Helium detection device

Abstract

The utility model relates to the technical field of fluid sealing performance testing of structural components, in particular to a helium detection device, a plate heat exchanger is provided with a connecting pipe, the helium detection device comprises a base used for placing the plate heat exchanger, the base is provided with a gas transmission hole corresponding to the connecting pipe, and the gas transmission hole is connected with external inflation equipment through a gas transmission pipe arranged in the base. A positioning ring is arranged on the periphery of the gas transmission hole, the positioning ring and the gas transmission hole are concentric, the connecting pipe arranged at the gas transmission hole abuts against the outer wall of the positioning ring, a detection groove for the connecting pipe to extend into is formed in the base, the gas transmission hole is formed in the bottom of the detection groove, a sealing ring is arranged in the detection groove, and an annular groove capable of containing the sealing ring is formed in the inner wall of the detection groove. According to the helium detection device, the gas transmission hole and the gas transmission pipe are integrated on the base, the heat exchanger to be detected can be detected only by placing the heat exchanger on the base, the detection difficulty is reduced, the detection steps are reduced, and the detection efficiency is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fluid tightness testing of structural components, and particularly relates to a helium leak detection device. Background Technique

[0002] Helium leak detection technology is widely used in industrial production, especially in the field of leak detection that requires high precision and high sensitivity, such as heat exchangers, condensers, and refrigeration equipment.

[0003] After retrieval, the patent with the publication number of CN111693222B discloses a helium mass spectrometry leak detection method for detecting the tightness of a printed circuit heat exchanger. The physical seal vacuum method and the pressurized vacuum method are respectively used to detect the tightness between the hot side and the atmosphere, between the cold side and the atmosphere, and between the hot and cold sides of the printed circuit heat exchanger. The detection data can accurately and intuitively reflect the leakage position and the magnitude of the leakage rate. The detection process is environmentally friendly and the detection efficiency is high. However, when the existing detection device conducts helium detection on a plate heat exchanger, it is necessary to first connect the docking pipe of the detection device to the air inlet of the plate heat exchanger, and then the gas transmission detection can be carried out. The detection steps are numerous, which greatly affects the detection efficiency. Content of the Utility Model

[0004] In order to solve the problem that during helium leak detection, it is necessary to first dock the connecting pipe with the air inlet and then conduct gas transmission detection, and the process is cumbersome, the utility model provides a helium leak detection device. By integrating the air outlet hole and the air delivery pipe on the base, it is only necessary to place the heat exchanger to be detected on the base to conduct the detection, which reduces the detection difficulty and the detection steps, and effectively improves the detection efficiency.

[0005] The utility model provides a helium leak detection device for detecting the tightness of a plate heat exchanger. A connecting pipe is arranged on the plate heat exchanger. The helium leak detection device includes a base for placing the plate heat exchanger. An air outlet hole corresponding to the connecting pipe is arranged on the base. The air outlet hole is connected to an external gas charging device through an air delivery pipe arranged in the base. By integrating the air outlet hole and the air delivery pipe on the base, gas transmission detection can be carried out by aligning the connecting pipe of the heat exchanger with the air outlet hole, which is convenient and fast.

[0006] Further, a positioning ring is arranged around the air outlet hole. The positioning ring is concentric with the air outlet hole. The connecting pipe placed at the air outlet hole abuts against the outer wall of the positioning ring. The sealing at the air outlet hole of the connecting pipe is ensured through the positioning ring.

[0007] Further, a detection groove for the connecting pipe to extend into is formed on the base, and the air outlet hole is arranged at the bottom of the detection groove. The connecting pipe can be placed into the detection groove to ensure the sealing at the air outlet hole of the connecting pipe.

[0008] Further, a sealing ring is arranged in the detection groove, and an annular groove for accommodating the sealing ring is formed on the inner wall of the detection groove. The sealing at the air outlet hole of the connecting pipe can be further ensured through the arrangement of the sealing ring.

[0009] Further, the inner diameter of the sealing ring is not greater than the diameter of the detection groove, and the inner diameter of the sealing ring is not less than the diameter of the connecting pipe. The sealing ring is tightly arranged between the detection groove and the connecting pipe.

[0010] Further, the sealing ring is made of rubber. The outer wall of the sealing ring is fixedly arranged in the annular groove through strong glue, and the inner wall of the sealing ring abuts against the outer wall of the connecting pipe. The rubber material has good elastic deformation effect.

[0011] Further, the sealing ring is a hollow ring, and the sealing ring is also provided with an air inlet. The deformation of the sealing ring can be generated by inflating and deflating.

[0012] Further, an air delivery pump is arranged on the base corresponding to the detection groove, and the air delivery pump is connected to the air inlet of the sealing ring. The inflation and deflation of the sealing ring are realized through the air delivery pump.

[0013] The beneficial effects of the utility model are as follows:

[0014] The utility model provides a helium detection device. By integrating the air delivery hole and the air delivery pipe on the base, only the heat exchanger to be detected needs to be placed in the corresponding detection groove on the base for detection. Moreover, the gap between the detection groove and the connecting pipe is sealed by the sealing ring, so that the detection difficulty is reduced and the detection steps are reduced, thereby effectively improving the detection efficiency. Description of the Drawings

[0015] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0016] Figure 1 It is a schematic diagram of Embodiment 1;

[0017] Figure 2 It is a schematic diagram of Embodiment 2;

[0018] Figure 3 It is a schematic diagram of the detection groove of Embodiment 2;

[0019] In the figure, 1. base, 2. air delivery hole, 3. air delivery pipe, 4. positioning ring, 5. detection groove, 6. sealing ring, 7. annular groove, 8. air delivery pump. Specific Embodiments

[0020] The following will clearly and completely describe the technical solutions of the utility model with reference to the drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the utility model.

[0021] The helium leak detection device is used to detect the sealing performance of the plate heat exchanger. It is a mechanism for outputting helium gas and can be a container for storing helium gas. An air pump connected to the gas pipeline 3 is installed on the container. A connecting pipe communicating with the gas pipeline 3 is provided on the plate heat exchanger. In order to simplify the helium leak detection steps and improve the helium leak detection efficiency, a helium leak detection device is designed.

[0022] Example 1, as Figure 1 shown, the helium leak detection device includes a base 1 for placing the plate heat exchanger. An air inlet hole 2 is provided on the base 1 corresponding to the connecting pipe. The air inlet hole 2 is connected to an external inflation device through a gas pipeline 3 placed inside the base 1. A positioning ring 4 is arranged around the air inlet hole 2. The positioning ring 4 is concentric with the air inlet hole 2. The connecting pipe placed at the air inlet hole 2 abuts against the outer wall of the positioning ring 4.

[0023] When the plate heat exchanger is placed on the base 1, the connecting pipe of the plate heat exchanger is opposite to the air inlet hole 2. The helium leak detection equipment can be directly started to inflate and detect the plate heat exchanger. Only by placing the heat exchanger to be detected on the base 1 can the detection be completed. The detection difficulty is low and the detection steps are few, which can greatly improve the detection efficiency. The positioning ring 4 is made of rubber and will not damage the connecting pipe. The positioning ring 4 is expanded and connected to the inner wall of the connecting pipe, which can ensure the seal between the air inlet hole 2 and the connecting pipe, thus ensuring the detection effect.

[0024] Example 2, as Figure 2 shown, the difference from Example 1 is that a detection groove 5 is provided to further improve the sealing performance. A detection groove 5 into which the connecting pipe can extend is opened on the base 1, and the air inlet hole 2 is arranged at the bottom of the detection groove 5. The connecting pipe of the plate heat exchanger can extend into the detection groove 5 for fixation, completing the positioning of the plate heat exchanger and improving the stability.

[0025] As Figure 3 shown, a sealing ring 6 is arranged in the detection groove 5, and an annular groove 7 for accommodating the sealing ring 6 is opened on the inner wall of the detection groove 5. By contracting the sealing ring 6 into the annular groove 7, the contact between the connecting pipe and the sealing ring 6 when the connecting pipe enters and exits the detection groove 5 can be further reduced, and the influence of the sealing ring 6 on the connecting pipe when the connecting pipe enters and exits the detection groove 5 can be reduced.

[0026] The inner diameter of the sealing ring 6 is not greater than the diameter of the detection groove 5, and the inner diameter of the sealing ring 6 is not less than the diameter of the connecting pipe. In order to ensure that the connecting pipe can smoothly extend into the detection groove 5 and block the gap between the connecting pipe and the detection groove 5.

[0027] The sealing ring 6 is made of rubber. The outer wall of the sealing ring 6 is fixedly arranged in the annular groove 7 through strong glue, and the inner wall of the sealing ring 6 abuts against the outer wall of the connecting pipe. The material of the sealing ring 6 is preferably rubber or latex, so that the sealing ring 6 can automatically reset when deflating, reducing the influence of the sealing ring 6 on the connecting pipe when the connecting pipe enters and exits the detection groove 5.

[0028] The sealing ring 6 is a hollow ring, and is also provided with an air filling port. An air pump 8 is provided on the base 1 corresponding to the detection groove 5, and the air pump 8 is connected to the air filling port of the sealing ring 6. When the pipe of the plate heat exchanger is placed inside the detection groove 5, the air pump 8 is started to fill the hollow sealing ring 6, so that the sealing ring 6 is inflated and expanded until the inner wall of the sealing ring 6 and the pipe are against each other, thereby reducing the gap between the base 1 and the pipe, and ensuring the sealing of the helium test.

[0029] The above description is only illustrative rather than restrictive of the present invention. Those skilled in the art will understand that many modifications, changes or equivalents may be made without departing from the spirit and scope defined by the appended claims, but all will fall within the scope of protection of the present invention.

Claims

1. A helium detection device for detecting the sealing performance of a plate heat exchanger, wherein the plate heat exchanger is provided with a connecting pipe, characterized in that: The helium detection device comprises a base (1) for placing a plate heat exchanger, a gas delivery hole (2) is provided on the base (1) corresponding to the connecting pipe, and the gas delivery hole (2) is connected to an external inflation device via a gas delivery pipe (3) arranged in the base (1).

2. A helium detection device according to claim 1, characterized in that: A positioning ring (4) is arranged on the periphery of the gas delivery hole (2); the positioning ring (4) is concentric with the gas delivery hole (2); and a connecting pipe disposed at the gas delivery hole (2) abuts against an outer wall of the positioning ring (4).

3. A helium detection device according to claim 1, characterized in that: The base (1) is provided with a detection groove (5) into which a pipe can be inserted, and the air delivery hole (2) is arranged at the bottom of the detection groove (5).

4. A helium detection device according to claim 3, characterized in that: A sealing ring (6) is arranged in the detection groove (5), and an annular groove (7) capable of accommodating the sealing ring (6) is provided on the inner wall of the detection groove (5).

5. A helium detection device according to claim 4, characterized in that: The inner diameter of the sealing ring (6) is not greater than the diameter of the detection groove (5), and the inner diameter of the sealing ring (6) is not less than the diameter of the connecting pipe.

6. A helium detection device according to claim 5, characterized in that: The sealing ring (6) is made of rubber material, the outer wall of the sealing ring (6) is fixed in the annular groove (7) by means of strong glue, and the inner wall of the sealing ring (6) abuts against the outer wall of the connecting pipe.

7. A helium detection device according to claim 4, characterized in that: The sealing ring (6) is a hollow ring and is also provided with an air filling port.

8. A helium detection device according to claim 7, characterized in that: An air delivery pump (8) is provided on the base (1) corresponding to the detection groove (5), and the air delivery pump (8) is connected to the inflation port of the sealing ring (6).

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