Confluence sleeve and double-pipe heat exchanger

Abstract

The utility model provides a confluence sleeve and a double-pipe heat exchanger. The confluence sleeve comprises a body, the body comprises an end A and an end B which are oppositely arranged, at least three first through holes are formed in the end A of the body, a second through hole is formed in the end B of the body, runners in one-to-one correspondence with the first through holes are formed in the body, one ends of the runners are communicated with the first through holes, and the other ends of the runners are communicated with the second through holes. And the other end of the flow channel is gradually flared in a horn shape and then is communicated with the second through hole. The heat exchanger is simple in structure, suitable for on-site manufacturing, safe, reliable, capable of effectively reducing the pipeline resistance of the heat exchanger and prolonging the service life, and suitable for popularization and application.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, in particular to a confluence sleeve and a sleeve-and-tube heat exchanger. Background Art

[0002] The shell and tube heat exchanger is a common heat exchange equipment, including an outer tube and an inner tube sleeved inside the outer tube. One end of the inner and outer tubes are welded to the tube sheet, and the other end is connected to the rear section of the pipeline with a sleeve. One fluid flows in the inner tube and the other fluid flows in the outer tube, and the two fluids exchange heat through the tube wall.

[0003] When the fluid flows through the tube sheet, turbulence and turbulence are easily formed, the pipeline resistance is large, and the tube sheet is severely eroded and worn, which is not conducive to energy saving and easily shortens the life of the equipment. Utility Model Content

[0004] The utility model aims to provide a confluence sleeve and a shell and tube heat exchanger, which can reduce the pipeline resistance of the shell and tube heat exchanger and reduce the wear of the tube sheet.

[0005] The technical solution of the utility model is: a confluence sleeve, comprising a body, the body comprising an A end and a B end arranged opposite to each other, at least three first through holes are arranged on the A end of the body, a second through hole is arranged on the B end of the body, flow channels corresponding to the first through holes are arranged inside the body, one end of the flow channel is communicated with the first through hole, and the other end of the flow channel is communicated with the second through hole after gradually expanding in the shape of a trumpet.

[0006] Preferably, at least three of the flow channels are interconnected inside the body.

[0007] Preferably, the body is a cone with a larger end A and a smaller end B.

[0008] Preferably, a cylinder extends horizontally from the A end of the main body, and at least three of the first through holes are provided on the cylinder.

[0009] Preferably, at least three of the first through holes are evenly distributed on the circumference of the body.

[0010] Preferably, a straight-edge chamfer is provided on the outward side of the first through hole, and the straight-edge chamfer enables the edge of the first through hole to form a flared structure.

[0011] The utility model also provides a shell and tube heat exchanger, comprising an outer tube, an inner tube, a tube sheet, a sleeve and the above-mentioned confluence sleeve, the two ends of the outer tube are fixed to the tube sheet, one end of the tube sheet away from the outer tube is fixedly connected to the sleeve, the confluence sleeve is inserted into the sleeve, the A end of the confluence sleeve is connected to the tube sheet, the inner tube is arranged in the outer tube and has at least three ends, and the two ends of the inner tube pass through the tube sheets at the two ends of the outer tube and are connected to the first through holes in a one-to-one correspondence.

[0012] Preferably, a groove is provided on one end surface of the tube sheet, and the A end of the confluence sleeve is embedded in the groove.

[0013] Compared with the related art, the beneficial effects of the utility model are:

[0014] 1. A confluence sleeve is added between the tube sheet and the sleeve head. The confluence sleeve guides and merges the fluids of the three inner tubes and then flows out from the second through hole, or guides and divides the fluids of the second through hole into three flow channels to flow into the inner tube, which effectively solves the abnormal conditions such as turbulence and turbulence formed by the fluid flowing into the pipe of the shell and tube heat exchanger, reduces the rapid change of the flow direction of the fluid, and reduces the pressure loss of the fluid at the end of the shell and tube heat exchanger, which is beneficial to the reduction of energy consumption of the entire shell and tube heat exchanger. Through diversion, the wear of the tube sheet is also reduced;

[0015] Second, the confluence sleeve also has a certain protective and anti-scouring effect on the inner tube, tube sheet and sleeve head, which can extend the service life of the shell and tube heat exchanger;

[0016] 3. The confluence sleeve and sleeve head are fixed by conical surface matching to prevent rotation;

[0017] Fourth, the utility model has a simple structure and is suitable for on-site production. It is safe and reliable, can effectively reduce the pipe resistance of the heat exchanger, and prolongs the service life, and is suitable for popularization and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the confluence sleeve provided by the utility model from a first viewing angle and an internal perspective;

[0019] Figure 2 A schematic structural diagram of a second viewing angle of the confluence sleeve provided by the utility model;

[0020] Figure 3 This is a schematic diagram of the internal structure of the shell and tube heat exchanger provided by the utility model.

[0021] In the accompanying drawings: 1, confluence sleeve; 11, main body; 111, cylinder; 112, cone; 12, first through hole; 13, second through hole; 14, flow channel; 15, straight edge chamfer; 2, tube sheet; 21, groove; 3, sleeve; 4, outer tube; 5, inner tube. DETAILED DESCRIPTION

[0022] The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict. For the convenience of description, if the words "upper", "lower", "left" and "right" appear in the following text, they only indicate that the upper, lower, left and right directions are consistent with the drawings themselves, and do not limit the structure.

[0023] like Figure 1 , Figure 2 As shown, a confluence sleeve 1 provided in this embodiment includes a body 11 , a first through hole 12 , a second through hole 13 , a flow channel 14 and a straight-edge chamfer 15 .

[0024] The body 11 includes a cylinder 111 and a cone 112 connected in sequence. The small diameter end of the cone 112 forms the B end of the body 11, the large diameter end of the cone 112 is connected to the cylinder 111, and the end of the cylinder 111 forms the A end.

[0025] The cylindrical body 111 is provided with three first through holes 12, which are evenly distributed around the circumference. A second through hole 13 is provided at the B end of the body 11. The second through hole 13 forms a thin-walled structure at the B end. The body 11 is provided with three flow channels 14, which are equal in number to the first through holes 12. One end of the flow channel 14 is connected to the first through hole 12, and the other end is gradually expanded in a trumpet shape and connected to the second through hole 13 (such as Figure 2 The three flow channels 14 are connected inside the body 11.

[0026] like Figure 1 As shown, a straight-edge chamfer 15 is provided on the outward side of the first through hole 12 , and the straight-edge chamfer 15 enables the edge of the first through hole 12 to form a flared structure, which is convenient for installing the inner tube 5 .

[0027] like Figure 3 As shown, the utility model also provides a shell and tube heat exchanger, comprising an outer tube 4, an inner tube 5, a tube sheet 2, a sleeve 3 and the above-mentioned confluence sleeve 1. The two ends of the outer tube 4 are fixed to the tube sheet 2, and one end of the tube sheet 2 away from the outer tube 4 is fixed to the sleeve 3. A groove 21 is provided on the surface of one side of the tube sheet 2 close to the sleeve 3.

[0028] The confluence sleeve 1 is inserted into the sleeve head 3, the sleeve head 3 and the cone 112 of the body 11 form a conical surface for fit and fixation, and the A end of the confluence sleeve 1 is inserted into the groove 21. The confluence sleeve 1 is not welded to the tube sheet 2 and the inner tube 5, but fixed by fit. The sleeve head 3 is fixed to the B end by segment welding.

[0029] The inner tubes 5 are arranged in the outer tubes 4 and are in number of three. Both ends of the inner tubes 5 pass through the tube sheets 2 at both ends of the outer tubes 4 and are connected to the first through holes 12 in a one-to-one correspondence.

[0030] The outer tube 4 and the inner tube 5 are fixed to the tube sheet 2 by welding, and the inner tube 5 is welded on both sides. The sleeve 3 is a large and small head. The confluence sleeve 1 can improve the flow of fluid in the shell and tube heat exchanger.

[0031] The flow channel 14 inside the confluence sleeve 1 is lofted and finally formed in an array according to the number of inner tubes 5. The diameter of the first through hole 12 is the outer diameter of the inner tube 5 plus a reasonable gap.

[0032] The fluid enters from the second through hole 13 of the confluence sleeve 1 at one end of the shell-and-tube heat exchanger, and then flows out from the three first through holes 12 on the confluence sleeve 1 to the inner tube 5, realizing the confluence of multiple fluids into one, reducing the turbulence and turbulence of the fluid in the pipeline, and also protecting the confluence sleeve 1 at the other end. The fluid in the inner tube 5 flows in from the three first through holes 12 of the confluence sleeve 1 at the other end, and then flows out from the second through hole 13 on the confluence sleeve 1. By adding the confluence sleeve 1 at the end of the heat exchanger, the purpose of reducing the resistance of the heat exchanger pipeline and reducing the wear head life is achieved.

[0033] During installation, one end of the tube sheet 2 is welded to the outer tube 4 and the inner tube 5, and the inner tube 5 passes through the tube sheet 2 and extends into the first through hole 12. The number of the inner tubes 5 is designed according to the heat exchange requirements. The B end of the confluence sleeve 1 is fixed by the conical surface of the sleeve head 3, and the B end is welded to the inner wall of the sleeve head 3. The flow channel 14 in the confluence sleeve 1 can improve the flow and resistance of the internal fluid.

[0034] One end of the flow channel 14 is connected to the first through hole 12, and the other end of the flow channel 14 is gradually expanded in a trumpet shape and connected to the second through hole 13. This structural design can change the direction of the fluid, and its guiding effect can prevent the fluid from forming a local vortex at the end of the inner tube 5, reduce the scouring of the tube sheet 2, and extend the life of the shell and tube heat exchanger.

[0035] The installation of the confluence sleeve needs to ensure that the inner tube 5 extends out of the tube sheet 2 to a certain length, which is sufficient to extend into the first through hole 12. The reserved hole needs to control the tolerance to ensure that the inner tube 5 can be inserted into the first through hole 12. The inner tube 5 and the first through hole 12 are not welded.

[0036] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A confluence sleeve, characterized in that: The invention comprises a body (11), wherein the body (11) comprises an A end and a B end which are arranged opposite to each other, the A end of the body (11) is provided with at least three first through holes (12), the B end of the body (11) is provided with a second through hole (13), and the body (11) is provided with flow channels (14) which correspond to the first through holes (12) in a one-to-one manner, one end of the flow channel (14) is connected to the first through hole (12), and the other end of the flow channel (14) is connected to the second through hole (13) after gradually expanding in a trumpet shape.

2. The junction sleeve according to claim 1, characterized in that: At least three of the flow channels (14) are interconnected inside the body (11).

3. The junction sleeve according to claim 1, characterized in that: The body (11) is a cone with a larger end A and a smaller end B.

4. The junction sleeve according to claim 1, characterized in that: A cylinder is horizontally extended from the A end of the body (11), and at least three of the first through holes (12) are arranged on the cylinder.

5. The junction sleeve according to claim 1, characterized in that: At least three of the first through holes (12) are evenly distributed around the circumference of the body (11).

6. The junction sleeve according to claim 1, characterized in that: A straight-edge chamfer (15) is provided on the outward side of the first through hole (12), and the straight-edge chamfer (15) enables the edge of the first through hole (12) to form a flared structure.

7. A shell and tube heat exchanger, comprising an outer tube (4), an inner tube (5), a tube sheet (2) and a sleeve (3), wherein both ends of the outer tube (4) are fixed to the tube sheet (2), and one end of the tube sheet (2) away from the outer tube (4) is fixed to the sleeve (3), characterized in that: It also comprises a junction sleeve (1) as claimed in any one of claims 1 to 6, wherein the junction sleeve (1) is inserted into the sleeve head (3), the A end of the junction sleeve (1) is connected to the tube sheet (2), the inner tube (5) is arranged in the outer tube (4) and has at least three inner tubes (5), and the two ends of the inner tube (5) pass through the tube sheets (2) at the two ends of the outer tube (4) and are connected to the first through holes (12) in a one-to-one correspondence.

8. The double-tube heat exchanger according to claim 7, characterized in that: A groove (21) is provided on one end surface of the tube sheet (2), and the A end of the confluence sleeve (1) is embedded in the groove (21).

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