Tool structure for air tightness test

Abstract

The utility model discloses a tool structure for an air tightness test, which relates to the technical field of air tightness detection of pressure vessels and comprises a sealing cover plate, a sealing shell and a pipeline connecting piece, the sealing cover plate comprises a first sealing cover plate, and the first sealing cover plate is detachably mounted at a flange at one end of the insulating bonding piece; an open hole is formed in the surface of the sealing shell, the insulating bonding piece and the first sealing cover plate are located in the sealing shell, and a flange at the other end of the insulating bonding piece is installed at the open hole of the sealing shell and tightly attached to the edge of the outer side of the open hole; the pipeline connecting piece is installed on the sealing shell, and during use, air inflation or water injection is conducted on the interior of the sealing shell through the pipeline connecting piece. According to the utility model, the problem in the prior art that the actual working condition is not met due to the fact that pressure gas is filled into the insulating bonding piece and leakage detection is carried out outside the insulating bonding piece mainly aiming at a pressure container bearing high pressure outside during an air tightness test is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of air tightness detection of pressure vessels, in particular to a tooling structure for air tightness testing. Background Art

[0002] The vacuum interrupter is a vacuum sealed container made of ceramic or glass insulating shells and metal parts sealed together. A pair of contacts inside is in a high vacuum state with a pressure less than 10-2Pa. Due to the structural limitations of the vacuum interrupter, in order to meet the mechanical life of 10,000 times, the rated pressure at the bellows is usually not higher than 0.2MPa. The vacuum interrupter is applied to three-phase common box vacuum circuit breakers (China Patent Authorization Publication No. CN204740983U discloses the structure of the three-phase common box vacuum circuit breaker, and its structure is as follows Figure 1 As shown in the figure, because the pressure that the bellows of the vacuum interrupter can withstand is relatively low, in order to take into account the bellows structure of the vacuum interrupter and meet the insulation requirements of the circuit breaker tank, the circuit breaker needs to be filled with high-pressure gas. Therefore, two different high-pressure gas chambers and low-pressure gas chambers are usually set in the circuit breaker tank. The moving conductive rod and bellows of the vacuum interrupter are in the low-pressure gas chamber, and the vacuum interrupter body is in the high-pressure gas chamber. The high-pressure gas chamber and the low-pressure gas chamber are separated by insulating adhesives. The insulating adhesive composed of metal flanges and insulating materials is used as the high- and low-pressure gas chamber separation, which can meet different pressure requirements and insulation requirements, such as Figure 2 and Figure 3 The figure shows a schematic diagram of the structure of such an insulating adhesive.

[0003] At present, when conducting air tightness tests on such insulating adhesive parts, if conventional leak detection methods are used to seal the upper and lower flanges and fill the inside with pressurized gas, it does not conform to the actual working conditions. Therefore, a tooling structure is needed that can apply high pressure to the outside of the insulating adhesive part and perform leak detection inside to meet the actual working conditions and fully verify the air tightness performance of the insulating adhesive part. Utility Model Content

[0004] The utility model provides a tooling structure for air tightness test, so as to solve the problem that in the prior art, during the air tightness test, mainly for the pressure vessel with high pressure outside, pressurized gas is filled inside the insulating adhesive part, and leak detection is performed outside, which does not conform to the actual working conditions.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A tooling structure for air tightness test, characterized by comprising: a sealing cover plate for insulating adhesive parts, a sealing shell and a pipeline connector;

[0007] The sealing cover plate comprises a first sealing cover plate, which is detachably mounted on a flange at one end of the insulating adhesive member;

[0008] An opening is arranged on the surface of the sealing shell, the insulating adhesive member and the first sealing cover plate are located in the sealing shell, and the other end flange of the insulating adhesive member is installed at the opening of the sealing shell, and the other end flange is close to the outer edge of the opening;

[0009] The pipeline connector is installed on the sealed shell. When in use, air or water is injected into the sealed shell through the pipeline connector.

[0010] In some embodiments, the diameter of the opening is a value between the diameters of the flanges at both ends of the insulating adhesive.

[0011] In some embodiments, a sealing groove is provided on the surface of the first sealing cover plate where the insulating adhesive is installed, and a sealing groove is provided on the surface of the sealing housing opening where the insulating adhesive is installed; a sealing ring is installed in the sealing groove.

[0012] In some embodiments, when the diameters of the flanges at both ends of the insulating adhesive are the same, the sealing cover plate also includes a second sealing cover plate, the first sealing cover plate and the second sealing cover plate are respectively detachably installed at the flanges at both ends of the insulating adhesive, and the sealing shell is detachably connected to the second sealing cover plate to form a sealing structure.

[0013] In some embodiments, the first sealing cover plate and the second sealing cover plate are both provided with sealing grooves on their contact surfaces with the insulating adhesive member and the sealing housing, and sealing rings are matched with the sealing grooves.

[0014] In some embodiments, the sealing cover plate is a cylindrical structure.

[0015] In some embodiments, the bottom diameter of the first sealing cover plate is equal to the flange diameter of the corresponding detachably mounted insulating adhesive member.

[0016] In some embodiments, the bottom surface diameter of the second sealing cover plate is larger than the flange diameter of the corresponding detachably mounted insulating adhesive member.

[0017] In some embodiments, the pipeline connector adopts a three-way valve.

[0018] In some embodiments, a pressure gauge is installed on the pipe connection.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] The utility model provides a tooling structure for air tightness test, including a sealing cover plate for an insulating adhesive, a sealing shell and a pipe connector, the sealing cover plate includes a first sealing cover plate, the first sealing cover plate is detachably mounted at one end flange of the insulating adhesive, the other end flange of the insulating adhesive is mounted at the opening of the sealing shell and is close to the outer edge of the opening, the pipe connector is mounted on the sealing shell, during the air tightness test, the sealing shell is inflated to the pressure required for the air tightness test, so that the outside of the insulating adhesive is pressurized, and leak detection is performed at the mounting surface of the sealing shell and the insulating adhesive, which can fully verify the air tightness of the insulating adhesive's own bonding surface and the flange sealing surface, and solve the problem that the prior art, during the air tightness test, mainly targets pressure vessels that are subjected to high pressure on the outside, fills the inside of the insulating adhesive with pressurized gas, and performs leak detection on the outside, which does not conform to the actual working conditions. In addition to the insulating adhesive, the utility model can be applied to other cavity-type components that are subjected to higher pressure on the outside than on the inside, and in addition to the air tightness test, the utility model can also be applied to the water pressure test, and water is injected into the sealing shell from the pipe connector to the test pressure to verify the strength of the component.

[0021] Furthermore, when the diameters of the flanges at both ends of the insulating adhesive are similar, the utility model can be set as an assembly structure, wherein a second sealing cover plate is also provided, and the first sealing cover plate and the second sealing cover plate are respectively detachably installed at the flanges at both ends of the insulating adhesive, and the sealing shell and the second sealing cover plate form a sealing structure. Through the airtightness test fixture structure proposed by the utility model, an airtightness test can be performed on an insulating adhesive that is subjected to high pressure externally, and the test method conforms to actual working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of a three-phase common box type vacuum circuit breaker;

[0023] Figure 2 is a cross-sectional view of an insulating adhesive member in an embodiment;

[0024] Figure 3 It is a structural schematic diagram of the insulating adhesive member in the embodiment;

[0025] Figure 4 A schematic diagram of the structure of the tooling for air tightness testing provided in Example 1;

[0026] Figure 5 This is a schematic diagram of the structure of the tooling for air tightness testing provided in Example 2.

[0027] Among them, 1. a first sealing cover plate; 2. a second sealing cover plate; 3. a sealing shell; 4. a three-way valve seat; 5. a pressure gauge. DETAILED DESCRIPTION

[0028] In the following, only some exemplary embodiments are briefly described, and the described embodiments can be modified in various different ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be illustrative rather than restrictive in nature.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed or operate in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Embodiment 1

[0033] like Figure 4 As shown, a tooling structure for air tightness test includes: a sealing cover plate, a sealing shell 3, a pipe connector, and a pressure gauge 5. The sealing cover plate includes a first sealing cover plate 1, and the pipe connector adopts a three-way valve seat 4. An opening is set on the surface of the sealing shell 3, and the end flange of the insulating adhesive is installed at the opening and close to the outer edge of the opening.

[0034] When performing an air tightness test on the insulating adhesive, first assemble the first sealing cover plate 1 at the bottom of the insulating adhesive, and then assemble the insulating adhesive inside the sealing shell 3. A three-way valve seat 4 is installed on the sealing shell 3 for inflation, and a pressure gauge 5 is installed to monitor the internal gas pressure of the sealing shell 3.

[0035] A sealing groove is provided at the contact surface between the first sealing cover plate and the insulating adhesive member, and a sealing groove is provided at the contact surface between the sealing housing 3 and the insulating adhesive member, and a sealing ring is installed in the sealing groove. After the assembly is completed, the sealing housing 3 is inflated through the three-way valve seat 4, and the surface of the sealing housing 3 is wrapped with a plastic sheet. After the time required by the standard, a leak detector is used to detect leaks from the wrapped leak detection position, and the gas leakage rate is calculated.

[0036] If a gas leak occurs, a detector can be used to detect the inside of the insulating adhesive, the mounting surface between the insulating adhesive and the first sealing cover plate 1, the insulating adhesive's own bonding surface, and the mounting surface between the insulating adhesive and the sealing housing 3 to determine the leak location.

[0037] The above-mentioned tooling structure for airtightness test is suitable for the situation where the diameters of the metal flanges at both ends of the insulating adhesive are inconsistent. The opening diameter of the sealing shell 3 is between the diameters of the metal flanges at both ends of the insulating adhesive, so that there is enough space to set the sealing groove.

[0038] Embodiment 2

[0039] like Figure 5 As shown, a tooling structure for air tightness test includes: a sealing cover plate, a sealing shell 3, a pipeline connector, and a pressure gauge 5. The sealing cover plate includes a first sealing cover plate 1 and a second sealing cover plate 2. The pipeline connector adopts a three-way valve seat 4. When performing the air tightness test, the first sealing cover plate 1 and the second sealing cover plate 2 are first installed on the metal flanges at both ends of the insulating adhesive, and then the second sealing cover plate 2 is assembled to the sealing shell 3 to form a sealing structure. The three-way valve seat 4 is installed on the sealing shell 3 for inflation, and a pressure gauge 5 is also installed. The pressure gauge 5 is used to monitor the gas pressure inside the sealing shell 3.

[0040] Each contact surface between the first sealing cover plate 1, the second sealing cover plate 2 and the sealing housing is provided with a sealing groove, and a sealing ring is installed in the sealing groove. After the whole tooling structure is assembled, the sealing housing 3 is inflated through the three-way valve seat 4, and the surface of the sealing housing 3 is wrapped with a plastic sheet. After the standard required time has passed, a leak detector is used to detect leaks from the wrapped leak detection position, and the gas leakage rate is calculated.

[0041] At this time, if a gas leak occurs, the detector can be used to detect the inside of the insulating adhesive, the mounting surface of the insulating adhesive and the sealing cover plate, the bonding surface of the insulating adhesive itself, and the mounting surface of the insulating adhesive and the sealing shell 3 to determine the leak location.

[0042] The airtightness test fixture structure provided in the second embodiment is not limited by the diameter of the metal flange of the insulating adhesive component and is applicable to various sizes.

[0043] Through the above embodiments, the utility model inflates the sealing shell 3 so that the outside of the insulating adhesive is pressurized, and leaks are detected at the wrapped leak detection position, which can fully verify the air tightness of the bonding surface and the sealing surface of the insulating adhesive. The sealing shell 3 can be set as a detachable assembly structure according to the diameter size of the metal flanges at both ends of the insulating adhesive, which is suitable for the situation where the diameters of the upper and lower sections of the insulating adhesive are similar. In addition, in addition to being applicable to air tightness tests, the utility model can also be applied to water pressure tests of such insulating adhesives.

Claims

1. A tooling structure for air tightness test, characterized in that: include: A sealing cover plate, a sealing shell (3) and a pipe connector for an insulating adhesive member; The sealing cover plate comprises a first sealing cover plate (1), and the first sealing cover plate (1) is detachably mounted on a flange at one end of the insulating adhesive member; An opening is provided on the surface of the sealing shell (3); the insulating adhesive component and the first sealing cover plate (1) are located inside the sealing shell (3); the other end flange of the insulating adhesive component is mounted at the opening of the sealing shell (3), and the other end flange is in close contact with the outer edge of the opening; The pipeline connector is mounted on the sealed housing (3). When in use, air or water is injected into the sealed housing through the pipeline connector.

2. The air tightness test tooling structure according to claim 1, characterized in that: The diameter of the opening is a value between the diameters of the flanges at both ends of the insulating adhesive.

3. The air tightness test tooling structure according to claim 1, characterized in that: A sealing groove is provided on the surface of the first sealing cover plate (1) on which the insulating adhesive member is mounted, and a sealing groove is provided on the surface of the opening of the sealing housing (3) on which the insulating adhesive member is mounted; The sealing groove is equipped with a sealing ring.

4. The air tightness test tooling structure according to claim 1, characterized in that: When the diameters of the flanges at both ends of the insulating adhesive are the same, the sealing cover plate further comprises a second sealing cover plate (2), the first sealing cover plate (1) and the second sealing cover plate (2) are respectively detachably mounted on the flanges at both ends of the insulating adhesive, and the sealing shell (3) is detachably connected to the second sealing cover plate (2) to form a sealing structure.

5. The air tightness test tooling structure according to claim 4, characterized in that: The first sealing cover plate (1) and the second sealing cover plate (2) are both provided with sealing grooves on their contact surfaces with the insulating adhesive member and the sealing housing (3), and the sealing grooves are equipped with sealing rings.

6. The air tightness test tooling structure according to claim 4, characterized in that: The sealing cover plate is a cylindrical structure.

7. The air tightness test tooling structure according to claim 6, characterized in that: The bottom diameter of the first sealing cover plate (1) is equal to the flange diameter of the corresponding detachably mounted insulating adhesive component.

8. The air tightness test tooling structure according to claim 6, characterized in that: The bottom surface diameter of the second sealing cover plate (2) is larger than the flange diameter of the corresponding detachably installed insulating adhesive component.

9. The air tightness test tooling structure according to claim 1, characterized in that: The pipeline connecting piece adopts a three-way valve.

10. The air tightness test tooling structure according to claim 1, characterized in that: A pressure gauge is installed on the pipeline connecting piece.

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