Device and method for detecting air tightness of seat ring

Abstract

The invention relates to a device and method for detecting the airtightness of a seat ring, and belongs to the technical field of compressor detection, and the device comprises a gas core which is divided into a supporting section, a detection section and a connection section which are connected in sequence; the tail end of the supporting section is provided with a gas path along the axial direction, and the gas path extends inwards to the detection section and is branched into a plurality of branches communicated with the external environment along the radial direction of the detection section; the multiple sealing rings are arranged on the detection section in a sleeving mode, the multiple sealing rings are divided into two groups and distributed on the two sides of the branch outlet, the seat ring is arranged on the detection section in a sleeving mode and abuts against the sealing rings, and the sleeving and fixing position of the pipe body and the pipe seat is located between the two groups of sealing rings; the pressing head is used for being connected with the connecting section and then matched with the supporting section to press the seat ring. Compared with the prior art, the air tightness detection of the housing ring of the housing assembly is realized, and the method can be used for evaluating the risk of the housing when the abnormal leakage of the housing ring of the compressor is found, or is used as a conventional monitoring leakage detection means of the housing assembly.

Description

Technical Field

[0001] The invention relates to the technical field of compressor detection, and in particular to a device and a detection method for seat ring air tightness detection. Background Art

[0002] The existing shell of the compressor is an assembly formed by welding multiple components, among which most of the components are welded components, especially the seat ring, which is formed by sleeve-fitting a tube body and a tube seat. The material of the tube body is mostly copper, and the material of the tube seat is mostly iron. The sleeve-fitting part of the tube body and the tube seat is welded by solder. Since the gap between the tube body and the tube seat is small, the solder welding may result in insufficient welding or leakage channels, so welding leakage is prone to occur at the sleeve-fitting part of the seat ring.

[0003] In the prior art, the only way to evaluate whether the seat ring on the housing assembly is leaking is to perform a water test after assembling the compressor. Once the compressor water test shows an abnormality, the cost of rescuing it is high. Summary of the invention

[0004] The purpose of the present invention is to provide a device and a method for detecting the air tightness of a seat ring in order to overcome at least one of the defects of the prior art.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] One of the purposes of the present invention is to provide a device for detecting the air tightness of a seat ring, wherein the seat ring is formed by a tube body and a tube seat being sleeved and fixed, and the device comprises:

[0007] An air core, the air core is divided into a supporting section, a detection section and a connecting section which are connected in sequence; an air path is axially arranged at the end of the supporting section, the air path extends inwardly to the detection section, and is radially branched into a plurality of branches connected to the external environment along the detection section;

[0008] A plurality of sealing rings are sleeved on the detection section, and the plurality of sealing rings are divided into two groups and distributed on both sides of the branch outlet; the seat ring is sleeved on the detection section and abuts against the sealing ring, and the sleeve fixing part of the tube body and the tube seat is located between the two groups of sealing rings;

[0009] The pressure head is used to cooperate with the supporting section to press the seat ring after being connected with the connecting section.

[0010] Furthermore, the pressing end of the pressure head is provided with a threaded hole threadedly connected to the connecting section, and the outer surface of the connecting section is matched with a thread, and the seat ring is pressed by the pressure head and the supporting section by rotating the pressure head.

[0011] Furthermore, gaskets are provided between the pressure head and the tube body and between the support section and the tube seat. On the one hand, the gaskets play a sealing role, and on the other hand, the gaskets prevent the pressure head from having hard contact with the seat ring, thereby preventing the seat ring from deforming.

[0012] Furthermore, the gasket is a silicone gasket with a thickness of at least 1 mm.

[0013] Furthermore, the pressure head is provided with a through hole in the radial direction for the force rod to pass through, and the pressure head is driven to rotate by rotating the force rod to tighten the seat ring.

[0014] Furthermore, a bearing is provided between the pressure head and the connecting section.

[0015] Furthermore, the outer wall of the support section is symmetrically provided with clamping parts along the central axis to facilitate the support section to be clamped by a clamp.

[0016] Furthermore, a threaded groove connected to an external gas source pipeline is also provided at the end of the support section, and the starting point of the gas path is located at the bottom of the threaded groove.

[0017] Furthermore, the height of the detection section is equal to the height of the seat ring. If the height of the detection section is greater than the height of the seat ring, the pressure head cannot play the role of pressing the seat ring. If the height of the detection section is less than the height of the seat ring, the seat ring is easily damaged during the pressing process of the pressure head.

[0018] The second object of the present invention is to provide a method for detecting the air tightness of a seat ring using the device as described above, the method comprising the following steps:

[0019] First, put the seat ring on the detection section, and then use the pressure head to connect the connecting section and the supporting section to press the seat ring tightly to obtain the tooling to be tested;

[0020] The external air source pipeline is connected to the air circuit at the end of the supporting section, and high-pressure gas is introduced. Then the tooling to be tested is immersed in water. When bubbles appear at the joint between the tube body and the tube seat, it indicates leakage and poor air tightness. When no bubbles appear, it indicates good air tightness.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] (1) The present invention provides a device for detecting the air tightness of a seat ring, in which the seat ring is sleeved on the detection section, and a sealing ring sleeved on the detection section and distributed on both sides of the branch is used to abut against the seat ring to complete the sealing of the seat ring weld. The seat ring is pressed tightly by connecting the pressure head to the connecting section and cooperating with the supporting section, and then the threaded groove of the air core is connected to the external air source pipeline. After high-pressure gas is introduced, the assembled device is immersed in water. When bubbles appear at the joint and fixing point between the tube body and the tube seat, it indicates leakage and poor air tightness. When no bubbles appear, it indicates good air tightness.

[0023] (2) Compared with the prior art, the present invention realizes the air tightness inspection of the seat ring of the shell assembly, which can be used for shell risk assessment when an abnormal seat ring leakage is found in the compressor, or as a conventional monitoring and leak detection method for the shell assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of a device for detecting air tightness of a seat ring in Example 1;

[0025] Figure 2 is a schematic diagram of the air core in Example 2;

[0026] Figure 3 Schematic diagram of the pressure head in Examples 1 and 2;

[0027] Figure 4 Schematic diagram of the gasket in Examples 1 and 2;

[0028] Figure 5 is a schematic diagram of a device for detecting air tightness of a seat ring in Example 3;

[0029] As shown in the figure, the numbers are as follows: 1-pressure head; 11-through hole; 12-threaded hole; 2-washer; 3-air core; 31-support section; 32-detection section; 33-connecting section; 34-air path; 35-branch; 36-threaded groove; 4-seat ring; 41-tube body; 42-tube seat; 5-bearing. DETAILED DESCRIPTION

[0030] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0031] Example 1

[0032] See also Figure 1 , 3 4. A device for detecting the air tightness of a seat ring, wherein the seat ring 4 is formed by sleeve-fitting a tube body 41 and a tube seat 42, and the sleeve-fitting part is welded by solder; comprising:

[0033] The air core 3 is divided into a supporting section 31, a detection section 32 and a connecting section 33 which are connected in sequence; an air path 34 is axially arranged at the end of the supporting section 31, the air path 34 extends inwardly to the detection section 32, and is radially branched into a plurality of branches 35 connected to the external environment along the detection section 32;

[0034] A plurality of sealing rings 6 sleeved on the detection section 32, the plurality of sealing rings 6 are divided into two groups and distributed on both sides of the outlet of the branch 35, the seat ring 4 sleeved on the detection section 32 and abutted against the sealing ring 6, and the sleeve fixing part of the tube body 41 and the tube seat 42 is located between the two groups of sealing rings 6;

[0035] The pressing head 1 is used to press the seat ring 4 in cooperation with the supporting section 31 after being connected to the connecting section 33 .

[0036] Please refer to Figure 1 In this embodiment, the pressing end of the pressing head 1 is provided with a threaded hole 12 threadedly connected to the connecting section 33, and the outer surface of the connecting section 33 is matched with a thread. By rotating the pressing head 1, the seat ring 4 is pressed by the pressing head 1 and the supporting section 31.

[0037] See also Figure 1 In this embodiment, a gasket 2 is provided between the pressure head 1 and the tube body 41, and a gasket 2 is provided between the support section 31 and the tube seat 42. The gasket 2 is a silicone gasket with a thickness of at least 1 mm. On the one hand, the gasket 2 plays a sealing role, and on the other hand, the gasket 2 prevents the pressure head 1 and the seat ring 4 from hard contact and deformation of the seat ring 4.

[0038] In this embodiment, the outer wall of the support section 31 is symmetrically provided with a clamping portion along the central axis to facilitate the support section 31 to be clamped by a clamp. The clamping portion is a plane formed by cutting off a piece of the support section 31 along its axial direction. The clamping portion symmetrically provided on the outer wall of the support section 31 can facilitate the support section 31 to be clamped by the clamp, so as to facilitate the subsequent operation of rotating the pressure head 1 to press the seat ring 4. The clamp can be a wrench or a bench vise.

[0039] See also Figure 1 In this embodiment, a threaded groove 36 connected to an external gas source pipeline is further provided at the end of the support section 31 , and the starting point of the gas path 34 is located at the bottom of the threaded groove 36 .

[0040] See also Figure 3 In this embodiment, the pressure head 1 is provided with a through hole 11 in the radial direction for the force rod to pass through. The pressure head 1 is rotated by rotating the force rod to tighten the seat ring 4.

[0041] See also Figure 1 In this embodiment, the height of the detection section 32 is equal to the height of the seat ring 4. If the height of the detection section 32 is greater than the height of the seat ring 4, the pressure head 1 cannot play the role of pressing the seat ring 4. If the height of the detection section 32 is less than the height of the seat ring 4, the seat ring 4 is easily damaged during the pressing process of the pressure head 1.

[0042] When in use, the support section 31 is clamped by a clamp, and then the gasket 2, the seat ring 4, and the gasket 2 are sequentially put on the detection section 32 of the gas core 3 of the device of this embodiment, and at the same time, it is ensured that the sleeve fixing part of the tube body 41 and the tube seat 42 is located between the two sets of sealing rings 6. The threaded hole of the pressure head 1 is threadedly connected with the connecting section 33, and the pressure head 1 is tightened by inserting the force rod provided in the pressure head through hole 11 to ensure good sealing between the pressure head 1 and the seat ring 4, and between the support section 31 and the seat ring 4.

[0043] After the device is assembled, it is connected to the external gas source pipeline through the threaded groove of the gas core 3. After the high-pressure gas is introduced, the assembled device is immersed in water. If bubbles appear at the joint and fixing point of the tube body 41 and the tube seat 42, it indicates leakage and poor air tightness. When no bubbles appear, it indicates that the seat ring 4 has no leakage and good air tightness.

[0044] Example 2

[0045] This embodiment is basically the same as the embodiment 1, except that the structure of the air core 3 in this embodiment is as follows: Figure 2 shown.

[0046] Example 3

[0047] This embodiment is basically the same as the embodiment 1, except that a bearing 5 is further provided between the pressure head 1 and the connecting section 33 in this embodiment. Figure 5 .

[0048] The above is only a preferred embodiment of the present invention, and does not limit the present invention in other forms. Any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention still belongs to the protection scope of the technical solution of the present invention.

Claims

1. A device for detecting the air tightness of a seat ring, wherein the seat ring (4) is formed by a tube body (41) and a tube seat (42) being sleeved and fixed, and characterized in that: The device includes: An air core (3), the air core (3) being divided into a supporting section (31), a detection section (32) and a connecting section (33) which are connected in sequence; an air path (34) is axially arranged at the end of the supporting section (31), the air path (34) extending inwardly to the detection section (32) and radially branching into a plurality of branches (35) connected to the external environment along the detection section (32); A plurality of sealing rings (6) sleeved on the detection section (32), the plurality of sealing rings (6) being divided into two groups and distributed on both sides of the outlet of the branch (35); the seat ring (4) sleeved on the detection section (32) and abutting against the sealing ring (6), and the sleeve-fixed portion of the tube body (41) and the tube seat (42) being located between the two groups of sealing rings (6); The pressing head (1) is used to press the seat ring (4) in cooperation with the supporting section (31) after being connected to the connecting section (33).

2. A device for detecting air tightness of a seat ring according to claim 1, characterized in that: The pressing end of the pressing head (1) is provided with a threaded hole (12) threadedly connected to the connecting section (33), and the outer surface of the connecting section (33) is matched with threads.

3. A device for detecting air tightness of a seat ring according to claim 2, characterized in that: Gaskets (2) are provided between the pressure head (1) and the tube body (41), and between the support section (31) and the tube seat (42).

4. A device for detecting air tightness of a seat ring according to claim 3, characterized in that: The gasket (2) is a silicone gasket with a thickness of at least 1 mm.

5. The device for detecting the air tightness of a seat ring according to claim 1, characterized in that: The pressure head (1) is provided with a through hole (11) in the radial direction for facilitating the passage of the force rod.

6. The device for detecting the air tightness of a seat ring according to claim 1, characterized in that: A bearing (5) is also provided between the pressure head (1) and the connecting section (33).

7. The device for detecting the air tightness of a seat ring according to claim 1, characterized in that: The outer wall of the support section (31) is symmetrically provided with clamping portions along the central axis to facilitate the support section (31) to be clamped by a clamp.

8. The device for detecting the air tightness of a seat ring according to claim 1, characterized in that: The end of the support section (31) is also provided with a threaded groove (36) connected to an external gas source pipeline, and the starting point of the gas path (34) is located at the bottom of the threaded groove (36).

9. The device for detecting the air tightness of a seat ring according to claim 1, characterized in that: The height of the detection section (32) is equal to the height of the seat ring.

10. A method for detecting the air tightness of a seat ring using the device according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: The seat ring (4) is put on the detection section (32), and then the pressure head (4) is connected with the connecting section (33) and the supporting section (31) to press the seat ring (4) tightly, so as to obtain the tooling to be detected; An external gas source pipeline is connected to the gas circuit (34), and high-pressure gas is introduced. The tooling to be tested is immersed in water. When bubbles appear at the joint and fixing point between the tube body (41) and the tube seat (42), it indicates that the air tightness is poor. When no bubbles appear, it indicates that the air tightness is good.

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