Heat exchanger leak detection tool

Abstract

The utility model discloses a heat exchanger leak detection tool. The utility model discloses, including: bottom plate, the both sides of bottom plate bottom all equidistance arrangement and be provided with a plurality of bottom air inlet valve, the middle position of bottom plate top is provided with the cushion block, the outside of bottom plate top is provided with the first rectangle frame, the middle position of first rectangle frame inner wall is provided with the first sealing washer, the top of first rectangle frame is provided with the second sealing washer. The utility model discloses, through the cooperation between air inlet valve and air outlet valve, the board type heat exchanger exists the loophole, and the staff can continuously extract the gas from the leak detection space through the air outlet valve, and then the board type heat exchanger can be determined to exist the loophole, if the board type heat exchanger does not exist the loophole, the staff cannot continuously extract the gas from the leak detection space through the air outlet valve, and then the board type heat exchanger can be determined to not exist the loophole, and the process does not need to use liquid, can avoid the liquid residue on the inner and outer surfaces of the heat exchanger, and will not cause the influence to the board type heat exchanger.

Description

Technical Field

[0001] This utility model relates to the field of leak detection device technology, specifically a leak detection tooling for heat exchangers. Background Technology

[0002] A plate heat exchanger is a high-efficiency heat exchanger composed of a series of corrugated metal plates stacked together. Thin rectangular channels are formed between the plates, through which heat exchange occurs. Plate heat exchangers are ideal for liquid-liquid and liquid-vapor heat exchange. They feature high heat exchange efficiency, low heat loss, compact and lightweight structure, small footprint, wide application, and long service life. Under the same pressure loss conditions, their heat transfer coefficient is 3-5 times higher than that of a tubular heat exchanger, their footprint is one-third that of a tubular heat exchanger, and their heat recovery rate can reach over 90%.

[0003] A search reveals a patent application (CN222439059U, published on February 7, 2025) for a leak detection device for a plate-fin heat exchanger. The device includes a crossbeam frame and a sliding block. The sliding block is mounted on the outer wall of the crossbeam frame. A connecting box is installed at the bottom of the sliding block. A support sleeve is installed at the bottom of the connecting box. A support shaft is slidably mounted at the bottom of the support sleeve, extending into the interior of the support sleeve. A clamping frame is installed at the bottom of the support shaft. A water tank is located outside the crossbeam frame on one side of the clamping frame. A [unclear - possibly a device or component] is located outside the crossbeam frame on the other side of the water tank. A placement platform is provided, with a plate-fin heat exchanger body at the top. An air outlet is provided on the outer wall of the plate-fin heat exchanger body, and an air inlet is provided on the outer wall of the plate-fin heat exchanger body away from the air outlet. A bidirectional cylinder is installed at the center of the bottom end of the clamping frame. Adjusting rods are symmetrically installed at the output end of the bidirectional cylinder. Support rods are symmetrically installed at the bottom end of the clamping frame on one side of the bidirectional cylinder. Clamping blocks are provided at the bottom end of the clamping frame on the adjusting rod side, and the clamping blocks are all slidably connected to the support rods and connected to the adjusting rods.

[0004] While the above-mentioned methods can quickly detect leaks on the outside of the heat exchanger, the leak detection device requires liquid assistance during the leak detection process. After the leak detection is completed, there may be residual liquid on the surface or inside of the heat exchanger. Therefore, the heat exchanger needs to be dried. However, the liquid inside the heat exchanger is not easy to clean, which can easily lead to residual liquid inside the heat exchanger. This can cause corrosion inside the heat exchanger, reduce its service life, and contaminate the coolant. Utility Model Content

[0005] The purpose of this invention is to provide a heat exchanger leak detection fixture to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a heat exchanger leak detection fixture, comprising:

[0007] The base plate has multiple bottom air intake valves arranged at equal intervals on both sides of its bottom. A pad is provided at the middle position of the top of the base plate. A first rectangular frame is provided on the outer side of the top of the base plate. A first sealing ring is provided at the middle position of the inner wall of the first rectangular frame. A second sealing ring is provided at the top of the first rectangular frame.

[0008] The top plate has a second rectangular frame on its outer bottom side, a third sealing ring at the bottom of the second rectangular frame, mounting plates on the top of both sides of the second rectangular frame, air vent valves at both ends of the mounting plates away from the second rectangular frame, a connector at the middle of the top of the top plate, multiple top air inlet valves equidistantly arranged on both sides of the top of the top plate, multiple elastic elements at the middle of the bottom of the top plate, a clamping plate at the bottom of the elastic elements, and a telescopic sleeve between the outer side of the clamping plate and the top plate.

[0009] By adopting the above technical solution, the presence of pads on the base plate and elastic elements and clamping plates on the top plate allows workers to fix plate heat exchangers of different sizes inside the first and second rectangular frames. Since both the base and top plates are equipped with multiple bottom and top air inlet valves, the inlets and outlets of different types of plate heat exchangers can be connected to either the bottom or top air inlet valve. Workers then introduce gas into the plate heat exchanger through the bottom or top air inlet valve and release it through the outlet valve. The air in the leak detection space formed by the first and second rectangular frames is then evacuated. If the plate heat exchanger has a leak, the operator can continuously extract gas from the leak detection space through the vent valve, thus confirming that the plate heat exchanger has a leak. If the plate heat exchanger does not have a leak, the operator cannot continuously extract gas from the leak detection space through the vent valve, thus confirming that the plate heat exchanger does not have a leak. This process does not require the use of liquid, thus avoiding liquid residue on the inner and outer surfaces of the heat exchanger and preventing any impact on the plate heat exchanger.

[0010] Preferably, buffer blocks are provided on both sides of the top of the base plate and on both sides of the bottom of the top plate, and both the pads and buffer blocks are made of rubber.

[0011] By adopting the above technical solution, the workers have installed ferrules or sleeves at the output ends of both the bottom and top air inlet valves. This prevents gas from leaking from the connection between the air inlet valve and the plate heat exchanger when the gas is introduced into the plate heat exchanger. The buffer block is made of rubber to facilitate the movement of the ferrule or sleeve on the air inlet valve, while the pad is also made of rubber to provide cushioning and prevent the elastic element and clamping plate from being damaged by compression when fixing the plate heat exchanger.

[0012] Preferably, an annular groove is provided at the middle position of the inner side of the first rectangular frame, and the first rectangular frame is connected to the first sealing ring through the annular groove.

[0013] By adopting the above technical solution, the first sealing ring can be stably and firmly fixed inside the first rectangular frame through the annular groove, and the first sealing ring is not easy to fall off when the first rectangular frame and the second rectangular frame are fitted together.

[0014] Preferably, the top of the first rectangular frame and the bottom of the second rectangular frame are provided with slots, and the first rectangular frame and the second rectangular frame are respectively engaged with the second sealing ring and the third sealing ring through the slots.

[0015] By adopting the above technical solution, the second and third sealing rings can be stably and firmly installed on the first and second rectangular frames through the slots, which can prevent the second and third sealing rings from falling off the first and second rectangular frames.

[0016] Preferably, a sealing groove is provided at the bottom of the outer surface of the second rectangular frame, the second rectangular frame is fitted with the first rectangular frame through the sealing groove, and the first sealing ring and the second sealing ring overlap with the sealing groove on the second rectangular frame.

[0017] By adopting the above technical solution, the first sealing ring, the second sealing ring and the third sealing ring can seal the connection between the first rectangular frame and the second rectangular frame, prevent gas from leaking from the connection between the first rectangular frame and the second rectangular frame, and keep the leak detection space of the first rectangular frame and the second rectangular frame in a sealed state when they are fitted together.

[0018] Preferably, round holes are provided on both sides of the bottom of the base plate, both sides of the top of the top plate, and both ends of the second rectangular frame. The dimensions of the bottom air inlet valve, the air outlet valve, and the top air inlet valve are adapted to the dimensions of the round holes. The bottom air inlet valve, the air outlet valve, and the top air inlet valve are connected to the base plate, the second rectangular frame, and the top plate respectively through the round holes.

[0019] By adopting the above technical solution, the bottom air inlet valve, the air outlet valve, and the top air inlet valve can be stably and firmly installed on the bottom plate, the second rectangular frame, and the top plate respectively through the round holes, so as to prevent the bottom air inlet valve, the air outlet valve, and the top air inlet valve from falling off the bottom plate, the second rectangular frame, and the top plate.

[0020] Preferably, the inner wall of the connector is provided with threads, the elastic element is composed of a buffer and a spring, and the top of both sides of the second rectangular frame is provided with fixing grooves, and the second rectangular frame is connected to the mounting plate through the fixing grooves.

[0021] By adopting the above technical solution, workers can install the top plate onto the lifting device through the threads on the connector, while the bottom plate is provided with fixing holes so that the bottom plate can be stably and firmly installed on the workbench.

[0022] Compared with the prior art, the beneficial effects of this utility model are:

[0023] 1. This heat exchanger leak detection fixture has multiple air inlet valves on both the bottom and top plates. Workers can connect the air inlet valves at different positions according to the inlet and outlet positions of the plate heat exchanger, so that different models of plate heat exchangers can be leak detected. Through the cooperation between the pads, elastic elements and clamping plates, workers can clamp and fix plate heat exchangers of different sizes between the first rectangular frame and the second rectangular frame.

[0024] 2. This heat exchanger leak detection fixture, through the coordination between the inlet valve and the outlet valve, determines that if there is a leak in the plate heat exchanger, the operator can continuously extract gas from the leak detection space through the outlet valve. If there is no leak in the plate heat exchanger, the operator cannot continuously extract gas from the leak detection space through the outlet valve, thus determining that there is no leak in the plate heat exchanger. This process does not require the use of liquid, which can avoid liquid residue on the inner and outer surfaces of the heat exchanger and will not affect the plate heat exchanger. Attached Figure Description

[0025] Figure 1 This is a three-dimensional view of the structure of this utility model;

[0026] Figure 2 This is a front view of the structure of this utility model;

[0027] Figure 3 This is a side view of the structure of this utility model;

[0028] Figure 4 This is a front sectional view of the internal structure of this utility model.

[0029] In the diagram: 1. Base plate; 2. Bottom air inlet valve; 3. Pad block; 4. First rectangular frame; 5. First sealing ring; 6. Second sealing ring; 7. Second rectangular frame; 8. Third sealing ring; 9. Mounting plate; 10. Air outlet valve; 11. Top plate; 12. Connector; 13. Top air inlet valve; 14. Elastic element; 15. Clamping plate; 16. Telescopic sleeve; 17. Buffer block. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0031] Please see Figure 1-4This utility model provides an embodiment of a heat exchanger leak detection fixture, comprising: a base plate 1, with multiple bottom air inlet valves 2 evenly spaced on both sides of the bottom of the base plate 1; a pad 3 positioned at the center of the top of the base plate 1; a first rectangular frame 4 positioned on the outer side of the top of the base plate 1; a first sealing ring 5 positioned at the center of the inner wall of the first rectangular frame 4; and a second sealing ring 6 positioned at the top of the first rectangular frame 4; and a top plate 11, with a second rectangular frame 7 positioned on the outer side of the bottom of the top plate 11; and a third sealing ring positioned at the bottom of the second rectangular frame 7. 8. Mounting plates 9 are provided on the top of both sides of the second rectangular frame 7. Air outlet valves 10 are provided at both ends of the mounting plates 9 on the side away from the second rectangular frame 7. A connector 12 is provided in the middle of the top of the top plate 11. Multiple top air inlet valves 13 are arranged equidistantly on both sides of the top of the top plate 11. Multiple elastic elements 14 are provided in the middle of the bottom of the top plate 11. A clamping plate 15 is provided at the bottom of the elastic element 14. A telescopic sleeve 16 is provided between the outer side of the clamping plate 15 and the top plate 11. Because a pad 3 is provided on the bottom plate 1, and in… The top plate 11 is equipped with an elastic element 14 and a clamping plate 15, allowing operators to fix plate heat exchangers of different sizes inside the first rectangular frame 4 and the second rectangular frame 7. Since both the bottom plate 1 and the top plate 11 are equipped with multiple bottom air inlet valves 2 and top air inlet valves 13, the inlets and outlets of different types of plate heat exchangers can be connected to the bottom air inlet valves 2 or 13. Operators then introduce gas into the plate heat exchanger through the bottom air inlet valves 2 or 13, and the gas is continuously discharged through the outlet valve 10. After the air in the leak detection space formed by the fitting of the rectangular frame 4 and the second rectangular frame 7 is completely evacuated, if there is a leak in the plate heat exchanger, the staff can continuously extract gas from the leak detection space through the vent valve 10, thus confirming that there is a leak in the plate heat exchanger. If there is no leak in the plate heat exchanger, the staff cannot continuously extract gas from the leak detection space through the vent valve 10, thus confirming that there is no leak in the plate heat exchanger. This process does not require the use of liquid, which can avoid liquid residue on the inner and outer surfaces of the heat exchanger and will not affect the plate heat exchanger.

[0032] In this embodiment, buffer blocks 17 are provided on both sides of the top of the base plate 1 and both sides of the bottom of the top plate 11. Both the pad block 3 and the buffer block 17 are made of rubber. The workers provide ferrules or sleeves at the output ends of the bottom air inlet valve 2 and the top air inlet valve 13 so that when the gas is introduced into the plate heat exchanger, the gas is not easy to leak from the connection between the air inlet valve and the plate heat exchanger. The buffer block 17 is made of rubber to facilitate the movement of the ferrule or sleeve on the air inlet valve, while the pad block 3 is made of rubber to play a buffering role and prevent the elastic element 14 and the clamping plate 15 from being damaged by compression when fixing the plate heat exchanger.

[0033] In this embodiment, an annular groove is provided at the middle position of the inner side of the first rectangular frame 4. The first rectangular frame 4 is connected to the first sealing ring 5 through the annular groove. The first sealing ring 5 can be stably and firmly locked inside the first rectangular frame 4 through the annular groove. When the first rectangular frame 4 and the second rectangular frame 7 are fitted together, the first sealing ring 5 is not easy to fall off.

[0034] In this embodiment, slots are provided at the top of the first rectangular frame 4 and the bottom of the second rectangular frame 7. The first rectangular frame 4 and the second rectangular frame 7 are respectively engaged with the second sealing ring 6 and the third sealing ring 8 through the slots. The second sealing ring 6 and the third sealing ring 8 can be stably and firmly installed on the first rectangular frame 4 and the second rectangular frame 7 through the slots, which can prevent the second sealing ring 6 and the third sealing ring 8 from falling off the first rectangular frame 4 and the second rectangular frame 7.

[0035] In this embodiment, a sealing groove is provided at the bottom of the outer surface of the second rectangular frame 7. The second rectangular frame 7 is fitted with the first rectangular frame 4 through the sealing groove. The first sealing ring 5 and the second sealing ring 6 overlap with the sealing groove on the second rectangular frame 7. The first sealing ring 5, the second sealing ring 6 and the third sealing ring 8 can seal the connection between the first rectangular frame 4 and the second rectangular frame 7 to prevent gas from leaking from the connection between the first rectangular frame 4 and the second rectangular frame 7, so that the leak detection space of the first rectangular frame 4 and the second rectangular frame 7 is in a sealed state when they are fitted together.

[0036] In this embodiment, round holes are provided on both sides of the bottom of the base plate 1, both sides of the top of the top plate 11, and both ends of the second rectangular frame 7. The dimensions of the bottom air inlet valve 2, the air outlet valve 10, and the top air inlet valve 13 are adapted to the dimensions of the round holes. The bottom air inlet valve 2, the air outlet valve 10, and the top air inlet valve 13 are connected to the base plate 1, the second rectangular frame 7, and the top plate 11 respectively through the round holes. The bottom air inlet valve 2, the air outlet valve 10, and the top air inlet valve 13 can be stably and firmly installed on the base plate 1, the second rectangular frame 7, and the top plate 11 respectively through the round holes, so as to prevent the bottom air inlet valve 2, the air outlet valve 10, and the top air inlet valve 13 from falling off the base plate 1, the second rectangular frame 7, and the top plate 11.

[0037] In this embodiment, the inner wall of the connector 12 is provided with threads, the elastic element 14 is composed of a buffer and a spring, and the top of both sides of the second rectangular frame 7 is provided with fixing grooves. The second rectangular frame 7 is connected to the mounting plate 9 through the fixing grooves. The operator can install the top plate 11 on the lifting device through the threads on the connector 12, and the bottom plate 1 is provided with fixing holes so that the bottom plate 1 can be stably and firmly installed on the workbench.

[0038] Working principle: The operator installs the top plate 11 onto the lifting device using the threads on the connector 12. The bottom plate 1 has fixing holes to ensure stable and secure installation on the workbench. The operator then connects the bottom inlet valve 2, outlet valve 10, and top inlet valve 13 to gas detection equipment such as an air pump and gas sensor via pipes. The operator places the plate heat exchanger on the pad 3, aligning the inlet and outlet of the plate heat exchanger with the bottom inlet valve 2 or the top inlet valve 13. The operator then lowers the top plate 11 using the lifting device, allowing the second rectangular frame 7 to fit over the first rectangular frame 4. When the first rectangular frame 4 and the second rectangular frame 7 are fitted together, the clamping plate 15... The plate heat exchanger is pressed tightly against the elastic element 14, thus fixing it between the pad 3 and the clamping plate 15. Then, the operator introduces gas into the plate heat exchanger through the bottom air inlet valve 2 or the top air inlet valve 13. The air outlet valve 10 continuously evacuates the air from the leak detection space formed by the first rectangular frame 4 and the second rectangular frame 7. If there is a leak in the plate heat exchanger, the operator can continuously extract gas from the leak detection space through the air outlet valve 10, thus confirming that there is a leak in the plate heat exchanger. If there is no leak in the plate heat exchanger, the operator cannot continuously extract gas from the leak detection space through the air outlet valve 10, thus confirming that there is no leak in the plate heat exchanger. This process does not require the use of liquid.

[0039] For those skilled in the art, this invention is not limited to the details of the exemplary embodiments described above, and can be implemented in other specific forms without departing from the spirit or scope of this invention. Therefore, the embodiments of this invention are exemplary and not restrictive. The scope of this invention is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A heat exchanger leak detection fixture, characterized in that, include: The bottom plate (1) has multiple bottom air inlet valves (2) arranged at equal intervals on both sides of the bottom of the bottom plate (1), a pad (3) is provided at the middle position of the top of the bottom plate (1), a first rectangular frame (4) is provided on the outer side of the top of the bottom plate (1), a first sealing ring (5) is provided at the middle position of the inner wall of the first rectangular frame (4), and a second sealing ring (6) is provided at the top of the first rectangular frame (4). A top plate (11) is provided with a second rectangular frame (7) on the outer side of the bottom of the top plate (11). A third sealing ring (8) is provided at the bottom of the second rectangular frame (7). Mounting plates (9) are provided on the top of both sides of the second rectangular frame (7). Air outlet valves (10) are provided at both ends of the mounting plate (9) away from the second rectangular frame (7). A connector (12) is provided at the middle position of the top of the top plate (11). Multiple top air inlet valves (13) are arranged at equal intervals on both sides of the top of the top of the top plate (11). Multiple elastic elements (14) are provided at the middle position of the bottom of the top plate (11). A clamping plate (15) is provided at the bottom of the elastic element (14). A telescopic sleeve (16) is provided between the outer side of the clamping plate (15) and the top plate (11).

2. The heat exchanger leak detection fixture according to claim 1, characterized in that: Buffer blocks (17) are provided on both sides of the top of the base plate (1) and both sides of the bottom of the top plate (11). Both the pad (3) and the buffer block (17) are made of rubber.

3. The heat exchanger leak detection fixture according to claim 1, characterized in that: An annular groove is provided at the middle position of the inner side of the first rectangular frame (4), and the first rectangular frame (4) is connected to the first sealing ring (5) through the annular groove.

4. The heat exchanger leak detection fixture according to claim 1, characterized in that: The top of the first rectangular frame (4) and the bottom of the second rectangular frame (7) are provided with slots, and the first rectangular frame (4) and the second rectangular frame (7) are respectively engaged with the second sealing ring (6) and the third sealing ring (8) through the slots.

5. The heat exchanger leak detection fixture according to claim 1, characterized in that: A sealing groove is provided at the bottom of the outer surface of the second rectangular frame (7). The second rectangular frame (7) is connected to the first rectangular frame (4) through the sealing groove. The first sealing ring (5) and the second sealing ring (6) overlap with the sealing groove on the second rectangular frame (7).

6. The heat exchanger leak detection fixture according to claim 1, characterized in that: The bottom two sides of the base plate (1), the top two sides of the top plate (11), and the two ends of the second rectangular frame (7) are all provided with round holes. The size of the bottom air inlet valve (2), the air outlet valve (10), and the top air inlet valve (13) are adapted to the size of the round holes. The bottom air inlet valve (2), the air outlet valve (10), and the top air inlet valve (13) are connected to the base plate (1), the second rectangular frame (7), and the top plate (11) respectively through the round holes.

7. The heat exchanger leak detection fixture according to claim 1, characterized in that: The inner wall of the connector (12) is provided with threads, the elastic element (14) is composed of a buffer and a spring, and the top of both sides of the second rectangular frame (7) is provided with a fixing groove. The second rectangular frame (7) is connected to the mounting plate (9) through the fixing groove.

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