WO2018018714A1

WO2018018714A1 - Pump for shell-and-tube heat exchanger

Info

Publication number: WO2018018714A1
Application number: PCT/CN2016/098717
Authority: WO
Inventors: 王鼎兴
Original assignee: 王鼎兴
Priority date: 2016-07-27
Filing date: 2016-09-12
Publication date: 2018-02-01
Also published as: CN106017199A; CN106017199B

Abstract

A pump for a shell-and-tube heat exchanger comprises a pump body (1), a driving disc (2), a driving shaft (3), and a reset lever (4). The driving shaft (3) is disposed offset from the center of the driving disc (2). The pump body is provided with two liquid inlet pipes (11, 13) and two liquid outlet pipes (12, 14). The merits of the pump for shell-and-tube heat exchangers are as follows. The two liquid inlet pipes (11, 13) and the two liquid outlet pipes (12, 14) are provided, and are driven using the same driving disc (2). Namely, the flow of the tube-side and shell-side fluids in a shell-and-tube heat exchanger can be simultaneously driven, such that using two pumps for driving can be avoided, and such that the tube-side pressure and the shell-side pressure can be more easily maintained equal for achieving zero pressure difference. Therefore, the weak junction between the tube side and the shell side is not liable to damage. When the tube side and the shell side undergo leakage, the tube-side and shell-side fluids are unlikely to be mixed rapidly, thereby providing greater safety.

Description

Pump for shell and tube heat exchanger

Technical field

The invention relates to the field of heat exchanger production and, more particularly, to a pump for a shell-and-tube heat exchanger.

Background technique

In the prior art, the tube-flow fluid and the shell-side fluid of the shell-and-tube heat exchanger are respectively driven by two pumps, the cost is high, and the pressure between the tube and the shell is not easily consistent, so that the tube and the shell are made. There is a pressure difference between them, and the pressure difference easily damages the weak joint between the tube and the shell; when a leak occurs between the tube and the shell, the pressure difference is also easy to make the tube fluid and the shell fluid a large amount and Fast mixing with low safety factor

Summary of the invention

The invention mainly solves the technical problems existing in the prior art, thereby providing a method with two inlet pipes and two outlet pipes, and driving by the same drive plate, that is, simultaneously driving the tube-and-tube heat exchanger tube process Fluid and shell-side fluid flow, avoiding the use of two pumps to drive, the pressure between the tube and shell is easier to maintain, no pressure difference, so it is not easy to damage the weak connection between the tube and shell, in the tube and shell When the process leaks, the tube fluid and the shell-side fluid are not easily mixed quickly, and the pump with a high safety factor is used for the shell-and-tube heat exchanger.

The present invention solves the technical problems existing in the prior art by the following technical solutions:

A pump for a shell-and-tube heat exchanger includes a pump body, a drive plate and a drive shaft, the drive shaft is rotated in a clockwise direction, and the pump body is a hollow disc-shaped structure. The driving disc is disposed in the pump body, and the driving shaft extends through the center end of the pump body into the pump body and is rotatably connected to the pump body, and the driving The disk and the end of the drive shaft are arranged perpendicular to each other and fixedly connected, the drive shaft is arranged away from the center of the drive disk, and the drive plate is straight The diameter is larger than the radius of the inner surface of the pump body, the driving disc is arranged tangentially to the inner surface of the pump body, and the left lower portion of the pump body is provided with a first liquid inlet tube and a left upper portion. a first liquid outlet pipe, a second liquid inlet pipe at the upper right portion, a second liquid discharge pipe at the lower right portion, the first liquid inlet pipe and the second liquid discharge pipe, and the A reset rod is disposed between the first liquid outlet tube and the second liquid inlet tube, and the reset rod is slidably connected to the pump body and connected by a spring, and one end of the reset rod extends into the chamber The inside and the other end of the pump body extend outside the pump body, and the reset rod extends into one end of the pump body to be attached to the side surface of the drive plate.

As a preferred embodiment of the present invention, the reset rod extends into an end surface of one end of the pump body, and a circular arc groove is disposed on the end surface of the pump body, and a sealing block is disposed in the circular arc groove. The sealing block has a crescent-shaped structure, and includes a first circular arc sealing surface and a second circular arc sealing surface;

The radius of the first arc sealing surface is equal to the radius of the driving disc, and the first arc sealing surface is attached to the side of the driving disc and to the side of the driving disc Sliding connection

The radius of the second arc sealing surface is equal to the radius of the arcuate groove, and the second arc sealing surface is attached to the surface of the arcuate groove and is The circular arc groove is slidably connected.

As a preferred embodiment of the present invention, the two reset rods are arranged coaxially, and the axis of the reset rod passes through the center of the drive shaft and is arranged perpendicular to the drive shaft.

The pump for a shell-and-tube heat exchanger of the present invention has the advantages of having two inlet pipes and two outlet pipes and driving by the same drive plate, that is, simultaneously driving the tube-and-tube heat exchanger tube-flow fluid And the shell-side fluid flow, avoiding the use of two pumps to drive, the pressure of the tube and shell sides is easier to maintain consistent, no pressure difference, so it is not easy to damage the weak connection between the tube and shell, in the tube and shell When a leak occurs, the tube fluid and the shell-side fluid are not easily mixed quickly, and the safety factor is high.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art description will be briefly described below. Obviously, the following description The drawings in the drawings are only some of the embodiments of the present invention, and those skilled in the art can obtain other drawings according to the drawings without any creative work.

Figure 1 is a schematic view showing the structure of a pump for a shell-and-tube heat exchanger of the present invention;

Figure 2 is a schematic structural view of the reset lever of Figure 1;

Figure 3 is a schematic structural view of the sealing block of Figure 1;

among them:

1. Pump body; 11, first inlet pipe; 12, first outlet pipe; 13, second inlet pipe; 14, second outlet pipe;

2, the drive disk;

3. The drive shaft;

4, reset rod; 41, arc-shaped groove;

5. Sealing block; 51, first arc sealing surface; 52, second arc sealing surface.

detailed description

The preferred embodiments of the present invention are described in detail below to enable the advantages and features of the present invention to be more readily understood by those skilled in the art.

Embodiment 1:

As shown in FIG. 1 , a pump for a shell-and-tube heat exchanger includes a pump body 1 , a drive plate 2 and a pump a drive shaft 3 that rotates in a clockwise direction, the pump body 1 is a hollow disc-shaped structure, the drive disc 2 is disposed in the pump body 1, and the drive shaft 3 passes through the center of the pump body 1 An end portion extends into the pump body 1 and is rotatably connected to the pump body 1. The drive plate 2 and the end of the drive shaft 3 are arranged perpendicularly and fixedly connected to each other, and the drive shaft 3 is arranged away from the center of the drive plate 2, The driving disc 2 has a diameter larger than the inner surface of the pump body 1. The driving disc 2 is disposed tangentially to the inner surface of the pump body 1. The lower left portion of the pump body 1 is provided with a first liquid inlet tube 11 and an upper left side. a first liquid outlet pipe 12, a second liquid inlet pipe 13 at the upper right portion, and a second liquid discharge pipe 14 at the lower right portion, between the first liquid inlet pipe 11 and the second liquid discharge pipe 14 A reset rod 4 is disposed between the first liquid outlet tube 12 and the second liquid inlet tube 13, and the reset rod 4 is slidably connected to the pump body 1 and connected by a spring. One end of the reset rod 4 extends into the pump. The inside and the other end of the body 1 extend outside the pump body 1. The reset rod 4 extends into one end of the pump body 1 and is attached to the side surface of the drive plate 2. This reset lever 4 is connected to the pump body 1 by a spring so that the end of the reset lever 4 can always be attached to the side of the drive plate 2. In use, the first liquid inlet tube 12 is connected to the tube or shell side of the shell-and-tube heat exchanger, and the second inlet tube 13 and the second tube The outlet pipe 14 is connected to the shell or tube of the shell-and-tube heat exchanger, and the pump for the shell-and-tube heat exchanger can be used to simultaneously drive the fluid flow of the tube and the shell, due to the shell The tube and shell side fluids of the heat exchanger are driven by the same drive disc 2, and the driving disc 2 is completely consistent with the rotational speed of the tube-side fluid and the shell-side fluid, so the pressure of the tube and shell fluid is relatively easy. Consistently, the pressure difference between the tube and shell sides is small, and the weak joints between the tube and shell are not easily damaged; when there is leakage between the tube and the shell, due to the pressure between the tube and the shell The difference is small, the fluid on both sides is not easy to mix quickly, and the safety factor is high.

Embodiment 2:

On the basis of the first embodiment, as shown in FIG. 1 and FIG. 2, the end surface of the reset rod 4 extending into one end of the pump body 1 is provided with a circular arc-shaped recess 41, which is arranged in the circular arc-shaped recess 41. a sealing block 5, as shown in Figure 3, the sealing block 5 has a crescent-shaped structure, including a first arc sealing surface 51 and a second arc sealing surface 52;

The radius of the first arc sealing surface 51 is equal to the radius of the driving disc 2, and the first arc sealing surface 51 is attached to the side surface of the driving disc 2 and is slidably connected to the side surface of the driving disc 2;

The radius of the second arc seal surface 52 is equal to the radius of the arcuate groove 41, and the second arc seal surface 52 is attached to the surface of the arcuate groove 41 and the arcuate groove 41 sliding connection.

The friction between the end of the reset rod 4 and the side of the drive plate 2 in the first embodiment is serious, and the sealing performance is poor. The user needs to replace the reset rod 4 periodically, and the use cost is high; In the second embodiment, by providing the sealing block 5, the user only needs to replace the sealing block 5 at regular intervals, and the use cost is low, and the sealing block 5 can also be made of wear-resistant material, thereby further improving the service life of the sealing block 5.

Embodiment 3:

On the basis of the second embodiment, as shown in FIG. 1, the two reset levers 4 are coaxially arranged, and the axis of the reset lever 4 passes through the center of the drive shaft 3 and is arranged perpendicular to the drive shaft 3. This structure can prevent the reset lever 4 from applying an additional load to the drive plate 2, which can improve energy efficiency.

The above is only a design idea of some embodiments of the present invention. When the system allows, the present invention can be extended to externally connect more functional modules to maximize the functions thereof.

The above is only the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of by the creative work are included in the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the invention as defined by the appended claims.

Claims

A pump for a shell-and-tube heat exchanger, comprising a pump body (1), a driving disc (2) and a driving shaft (3), wherein the driving shaft (3) rotates in a clockwise direction The pump body (1) is a hollow disc-shaped structure, the drive disc (2) is disposed in the pump body (1), and the drive shaft (3) passes through the pump body The center end of (1) extends into the pump body (1) and is rotatably coupled to the pump body (1), the drive disk (2) and the end of the drive shaft (3) The parts are arranged perpendicularly to each other and are fixedly connected, characterized in that the drive shaft (3) is arranged offset from the center of the drive disc (2), and the diameter of the drive disc (2) is larger than the pump body ( 1) The radius of the inner surface, the driving disk (2) is arranged tangentially to the inner surface of the pump body (1), and the first liquid inlet tube is disposed at the lower left portion of the pump body (1) (11), a first liquid outlet pipe (12) is disposed on the upper left portion, a second liquid inlet pipe (13) is disposed on the upper right portion, and a second liquid discharge pipe (14) is disposed on the lower right portion, and the first liquid inlet pipe is disposed. Between the tube (11) and the second liquid outlet tube (14) and the first liquid outlet tube (12) and the first A reset rod (4) is disposed between the two inlet pipes (13), and the reset rod (4) is slidably connected to the pump body (1) and connected by a spring, and the reset rod (4) One end extends into the interior of the pump body (1) and the other end projects outside the pump body (1), and the reset rod (4) extends into one end of the pump body (1) Fitted on the side of the drive disc (2).
The pump for a shell-and-tube heat exchanger according to claim 1, characterized in that the reset rod (4) extends into an end surface of one end of the pump body (1) and is provided with a circular arc shape. a groove (41), a sealing block (5) disposed in the circular arc groove (41), the sealing block (5) having a crescent-shaped structure in cross section, including a first arc sealing surface (51) and a second arc sealing surface (52);

The radius of the first arc sealing surface (51) is equal to the radius of the driving disc (2), and the first arc sealing surface (51) is attached to the driving disc (2) Slidingly connected to the side of the drive disc (2);

The radius of the second arc sealing surface (52) is equal to the radius of the circular arc groove (41), and the second arc sealing surface (52) is attached to the arc The surface of the groove (41) is slidably coupled to the arcuate groove (41).
Pump for a shell-and-tube heat exchanger according to claim 1, characterized in that said two reset rods (4) are arranged coaxially, the axis of said reset rod (4) passing through said The center of the drive shaft (3) is arranged perpendicular to the drive shaft (3).