Flow leakage prevention structure and heat exchanger

Abstract

The utility model discloses a flow leakage prevention structure and a heat exchanger. The flow leakage prevention structure comprises baffle plates, sealing pieces and sealing plates. An annular groove is formed in the baffle plate, and the annular groove is formed in the side face, close to the heat exchanger cylinder, of the baffle plate; the sealing piece is arranged in the annular groove, and the height of the sealing piece is larger than the height b of the annular groove; the sealing plate comprises a bent part and a plane part, and the plane part is arranged in the annular groove. By arranging the two-stage sealing structure formed by the sealing plate and the sealing piece and arranging the bent part and the plane part on the sealing plate, the sealing effect between the baffle plate and the heat exchanger cylinder is achieved, medium leakage is prevented, and the heat exchange efficiency of the heat exchanger is improved.

Description

Technical Field

[0001] This solution relates to the field of heat exchanger manufacturing, and specifically relates to a leakage prevention structure and a heat exchanger. Background Art

[0002] A heat exchanger mainly consists of a cylinder body, a tube bundle, and a tube box. Since the sizes of the cylinder body and the tube bundle of a heat exchanger are generally relatively large and are both assembled parts, it is not easy to install the tube bundle into the cylinder body during the manufacturing process. To ensure that the tube bundle can be smoothly inserted into the cylinder body, according to national standards, the inner diameter of the cylinder body is 2.5 - 14 mm larger than the diameter of the baffle. However, some media will flow through the gap between the cylinder body and the baffle to form a "leakage flow" phenomenon. The more the leaked media, the worse the heat exchange effect and the lower the efficiency of the heat exchanger.

[0003] To avoid the generation of leakage flow, a structure that can both prevent media leakage flow and is easy to install needs to be designed. Utility Model Content

[0004] To solve the above technical problems, the present utility model provides a leakage prevention structure and a heat exchanger. By setting a two - stage sealing structure formed by a sealing plate and a sealing member, and by setting a bending part and a flat part on the sealing plate, the sealing effect between the baffle and the heat exchanger cylinder body is achieved, preventing media leakage flow and improving the heat exchange efficiency of the heat exchanger.

[0005] To achieve the above purpose, the technical solution adopted by the present utility model is as follows:

[0006] In the first aspect, the present utility model provides a leakage prevention structure, which is characterized by comprising:

[0007] A baffle, a sealing member, and a sealing plate;

[0008] A ring groove is provided on the baffle, and the ring groove is located on the side of the baffle close to the heat exchanger cylinder body;

[0009] The sealing member is arranged in the ring groove, and the height of the sealing member is greater than the height b of the ring groove;

[0010] The sealing plate includes a bending part and a flat part, and the flat part is arranged in the ring groove.

[0011] As a preferred technical solution, the width a of the ring groove is less than or equal to half of the thickness A of the baffle, that is, a ≤ 1 / 2A; the ring groove is located on the side of the baffle close to the media inlet.

[0012] As a preferred technical solution, the bending part includes a first bending part, a second bending part, a third bending part, and a fourth bending part.

[0013] As a preferred technical solution, the first bending portion is located at an end of the sealing plate close to the heat exchanger cylinder, and the first bending portion is convex in a direction away from the heat exchanger cylinder; the first bending portion and the second bending portion are connected, and the first bending portion and the second bending portion have opposite concave-convex directions, that is, the second bending portion is convex in a direction towards the heat exchanger cylinder.

[0014] As a preferred technical solution, a smooth portion is provided at the top end of the side wall of the annular groove on the side close to the medium inlet;

[0015] The third bending portion is located at the smooth portion of the annular groove, and the third bending portion has the same radian as the smooth portion and cooperates with each other.

[0016] As a preferred technical solution, the flat portion includes a horizontal portion and a vertical portion; the two ends of the fourth bending portion are respectively connected to the horizontal portion and the vertical portion; the two ends of the vertical portion are respectively connected to the third bending portion and the fourth bending portion.

[0017] As a preferred technical solution, the vertical portion is closely attached to the side wall of the annular groove.

[0018] As a preferred technical solution, the horizontal portion is closely attached to the bottom of the annular groove, and the width of the horizontal portion is smaller than the width a of the bottom of the annular groove.

[0019] As a preferred technical solution, the seal is a sealing ring.

[0020] In a second aspect, the present utility model further provides a heat exchanger installed with the anti-leakage structure.

[0021] The beneficial effects of the present utility model are:

[0022] 1. The sealing plate and the seal are respectively the first-stage seal and the second-stage seal of the anti-leakage structure. The two-stage seal improves the sealing effect, avoids the leakage phenomenon, and improves the heat exchange efficiency of the heat exchanger;

[0023] 2. The first bending portion and the second bending portion on the sealing plate have opposite concave-convex directions. When the sealing plate is subjected to the pressure of the medium, the first bending portion will tightly press against the heat exchanger cylinder. At this time, the structure of the second bending portion and the first bending portion will make the strength of the sealing plate greater. At the same time, since the surface area of the bending portion is larger than the surface area of the flat portion, the surface area of the sealing plate in contact with the medium will also increase, so that the sealing plate is in closer contact with the heat exchanger cylinder and the sealing effect is better;

[0024] 3. The third bending portion, the fourth bending portion and the smooth portion of the annular groove can reduce the stress at the bending position of the sealing plate and avoid the fracture of the sealing plate;

[0025] 4. The sealing plate is on the side of the baffle plate close to the medium inlet, and a large part of it is outside the baffle plate. When the tube bundle is pushed into the shell, the sealing plate will fall along the heat exchanger cylinder body, that is, the sealing plate bends towards the medium inlet side, and the resistance generated is very small, making the assembly of the product smoother. Brief Description of the Drawings

[0026] The accompanying drawings here are incorporated into the specification and form a part of this specification, showing embodiments in line with the present utility model, and are used together with the specification to explain the principles of the present utility model.

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, for those of ordinary skill in the art, other accompanying drawings can also be obtained based on these drawings without creative labor.

[0028] Figure 1 Schematic diagram of the leakage prevention structure of the present utility model;

[0029] Figure 2 Schematic diagram of the sealing plate of the present utility model;

[0030] Figure 3 Stereoscopic schematic diagram of the leakage prevention structure of the present utility model and the heat exchanger cylinder body;

[0031] Figure 4 For Figure 3 Partial enlarged view;

[0032] Figure 5 Stereoscopic diagram of the sealing plate of the present utility model;

[0033] Among them, 1 - baffle plate, 2 - seal, 3 - annular groove, 4 - sealing plate, 5 - first bending part, 6 - second bending part, 7 - third bending part, 8 - fourth bending part, 9 - vertical part, 10 - horizontal part, 11 - heat exchanger cylinder body. Detailed Embodiment

[0034] In order to be able to more clearly understand the above-mentioned objects, features and advantages of the present utility model, the solution of the present utility model will be further described below. It should be noted that, without conflict, the embodiments of the present utility model and the features in the embodiments can be combined with each other.

[0035] Many specific details are set forth in the following description in order to fully understand the present utility model, but the present utility model can also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only a part of the embodiments of the present utility model, rather than all the embodiments. Embodiment

[0036] Please refer toFigures 1 - 5 , a leakage - proof structure provided by the present utility model, includes a baffle plate 1, a seal 2, and a sealing plate 4; a ring groove 3 is arranged on the baffle plate 1, and the ring groove 3 is located on the side of the baffle plate 1 close to the heat exchanger cylinder 11; the seal 2 is arranged in the ring groove 3, the height of the seal 2 is greater than the height b of the ring groove 3, and the function of the seal 2 is to press the sealing plate 4 tightly to prevent the sealing plate 4 from moving arbitrarily in the ring groove 3, and at the same time play a role of secondary sealing, that is, if there is still a gap between the sealing plate 4 and the heat exchanger cylinder 11, the seal 2 will also intercept the medium to further prevent the medium from leaking. Preferably, the seal 2 is an O - ring; the sealing plate 4 includes a bent part and a flat part, and the flat part is arranged in the ring groove 3. It should be noted that if the baffle plate 1 is a circular plate - like object, the ring groove 3 is a groove that encircles the side wall of the baffle plate 1, and the corresponding seal 2 and sealing plate 4 are both circular rings; if the baffle plate 1 is a semi - circular plate - like object, the ring groove 3 is only arranged on the side of the baffle plate 1 close to the heat exchanger cylinder 11, that is, the ring groove 3 is only arranged on the side of the semi - circular arc part, and the corresponding seal 2 and sealing plate 4 are also semi - circular rings. That is, the lengths of the ring groove 3, the seal 2, and the sealing plate 4 match the shape of the baffle plate 1.

[0037] Further, please refer to Figure 1 , the width a of the ring groove 3 is less than or equal to half of the thickness A of the baffle plate 1, that is, a ≤ 1 / 2A; the ring groove 3 is located on the side of the baffle plate 1 close to the medium inlet, and a large part of the sealing plate 4 is outside the baffle plate 1. When installing the tube bundle, it is convenient for the sealing plate 4 to be tilted towards the side close to the medium inlet, and at the same time, the length of the sealing plate 4 can be reduced, the thickness of the baffle plate 1 can be reduced, and further the resistance to assembling the leakage - proof structure into the heat exchanger cylinder 11 can be reduced, so that the assembly of the heat exchanger is smoother.

[0038] Further, please refer to Figures 1 - 5 , the bent part includes a first bent part 5, a second bent part 6, a third bent part 7, and a fourth bent part 8; the first bent part 5 is located at the end of the sealing plate 4 close to the heat exchanger cylinder 11, and the first bent part 5 is convex in the direction away from the heat exchanger cylinder 11; the first bent part 5 and the second bent part 6 are connected, and the convex - concave directions of the first bent part 5 and the second bent part 6 are opposite, that is, the second bent part 6 is convex in the direction towards the heat exchanger cylinder 11. When the sealing plate 4 is subjected to the pressure of the medium, the first bent part 5 will tightly press against the heat exchanger cylinder 11. At this time, the reverse structure of the second bent part 6 and the first bent part 5 will make the strength of the sealing plate 4 greater. At the same time, since the surface area of the bent part is larger than that of a straight line, the surface area of the sealing plate 4 in contact with the medium will also increase, so that the sealing plate 4 is in closer contact with the heat exchanger cylinder 11 and the sealing effect is better.

[0039] Further, please refer toFigures 1 - 2 On the top of the side wall of the annular groove 3 near the medium inlet, a rounded portion is provided; the third bending portion 7 is located at the rounded portion of the annular groove 3, and the third bending portion 7 has the same radian as the rounded portion and cooperates with each other. When the sealing plate 4 is subjected to the pressure of the medium, the third bending portion 7 deforms, preventing the sealing plate 4 from breaking under repeated stress. The radius of the R arc of the rounded portion is preferably 2-3 mm, which is slightly smaller than the gap between the baffle 1 and the heat exchanger cylinder 11, facilitating installation and not causing large deformation when the sealing plate 4 is stressed.

[0040] Further, please refer to Figure 2 The planar portion includes a horizontal portion 10 and a vertical portion 9; both ends of the fourth bending portion 8 are respectively connected to the horizontal portion 10 and the vertical portion 9; both ends of the vertical portion 9 are respectively connected to the third bending portion 7 and the fourth bending portion 8; the vertical portion 9 is closely attached to the side wall of the annular groove 3; the horizontal portion 10 is closely attached to the bottom of the annular groove 3, and the width of the horizontal portion 10 is smaller than the width a of the bottom of the annular groove 3.

[0041] The following is the specific implementation process:

[0042] Install the planar portion of the sealing plate 4 in the annular groove 3 of the baffle 1, and the first bending portion 5 and the second bending portion 6 extend outside the annular groove 3. Place the sealing ring in the annular groove 3. At this time, the horizontal portion 10 of the sealing plate 4 is located between the sealing ring and the annular groove 3 of the baffle 1. The leakage prevention structure is assembled into the heat exchanger cylinder 11 along with the tube bundle.

[0043] When the medium flows from the inlet direction towards the sealing plate 4, since the second bending portion 6 is convex towards the cylinder direction and concave relative to the medium inlet direction at a certain angle, the pressure on the second bending portion 6 is the greatest. The second bending portion 6 will deform towards the direction away from the medium inlet, and at the same time, the first bending portion 5 will also follow the second bending portion 6 to deform. When the first bending portion 5 deforms, it will fit more closely to the heat exchanger cylinder 11. The greater the pressure on the second bending portion 6, the closer the first bending portion 5 fits to the heat exchanger cylinder 11, and the better the sealing effect. When the second bending portion 6 is subjected to the pressure of the medium, the third bending portion 7 will also produce a slight deformation. When the third bending portion 7 deforms, it will compress the sealing ring, and at the same time, the reaction force given by the sealing ring will also cause the sealing plate 4 to contact the annular groove 3 more closely, and the sealing effect will also be better. The third bending portion 7 fits closely with the annular groove 3. When there is pressure of the medium on the sealing plate 4, the third bending portion 7 will deform along the direction of the medium flow, pressing the sealing ring to make the sealing effect better.

[0044] After the sealing plate 4 is pressed by the sealing ring, the pressure of the medium on the sealing plate 4 will be decomposed onto the heat exchanger cylinder body 11 and the sealing ring. At this time, the sealing plate 4 resists and balances the pressure of the medium through deformation, and the sealing ring will also undergo slight deformation to relieve the pressure on the sealing plate 4. At the same time, the contact between the sealing ring and the heat exchanger cylinder body 11 will be closer after deformation, and the sealing effect will be better. Embodiment

[0045] The present invention also provides a heat exchanger, which includes the above-mentioned anti-leakage flow structure and further includes a heat exchanger cylinder body 11.

[0046] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, various changes and modifications can be made to the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A leak-proof flow structure, characterized in that, Comprising: Baffle plates, seals, and sealing plates; A ring groove is provided on the baffle plate, and the ring groove is located on the side of the baffle plate close to the heat exchanger cylinder; The seal is arranged in the ring groove, and the height of the seal is greater than the height b of the ring groove; The sealing plate includes a bent portion and a flat portion, and the flat portion is arranged in the ring groove.

2. The anti-leakage structure according to claim 1, characterized in that, The width a of the ring groove is less than or equal to half of the thickness A of the baffle plate, that is, a ≤ 1 / 2A; the ring groove is located on the side of the baffle plate close to the medium inlet.

3. The anti-leakage structure according to claim 1, characterized in that, The bent portion includes a first bent portion, a second bent portion, a third bent portion, and a fourth bent portion.

4. A leak-proof flow structure according to claim 3, characterized in that, The first bent portion is located at the end of the sealing plate close to the heat exchanger cylinder, and the first bent portion is convex in the direction away from the heat exchanger cylinder; the first bent portion and the second bent portion are connected, and the concave-convex directions of the first bent portion and the second bent portion are opposite, that is, the second bent portion is convex in the direction towards the heat exchanger cylinder.

5. The anti-leakage structure according to claim 3, characterized in that, A rounded portion is provided at the top of the side wall of the ring groove close to the medium inlet; The third bent portion is located at the rounded portion of the ring groove, and the third bent portion has the same radian as the rounded portion and cooperates with each other.

6. The anti-leakage structure according to claim 3, characterized in that, The flat portion includes a horizontal portion and a vertical portion; the fourth bent portion is connected to the horizontal portion and the vertical portion at both ends respectively; the vertical portion is connected to the third bent portion and the fourth bent portion at both ends respectively.

7. The anti-leakage structure according to claim 6, characterized in that, The vertical portion is closely attached to the side wall of the ring groove.

8. The anti-leakage flow structure according to claim 6, characterized in that, The horizontal portion is closely attached to the bottom of the ring groove, and the width of the horizontal portion is less than the width a of the bottom of the ring groove.

9. The anti-leakage structure according to claim 1, characterized in that, The seal is an O-ring.

10. A heat exchanger, characterized in that, Comprising the leak-proof flow structure according to any one of claims 1-9.

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