Bell jar type leak rate detection equipment
By designing bell-cover leak rate detection equipment, the problem of existing equipment being unable to detect valve body leakage from the inside to the outside and batch inspection operations is solved, and batch, bidirectional leakage detection and efficient and simple operation processes are realized.
Patent Information
- Application Number
- CN202421499604.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-27
- Publication Date
- 2025-05-20
- Estimated Expiration
- 2034-06-27
AI Technical Summary
Existing leakage rate detection equipment can only detect inward leakage rate and cannot meet the detection requirements of valve body leakage from inside to outside. Moreover, when batch detection of multiple valves, it needs to be disassembled and assembled repeatedly, which is cumbersome to operate.
A bell-cover leak rate detection device is designed, including two independent testing chambers, sealed by sealing rings and screw connections, adopting an I-shaped hollow tubular structure and step threaded holes, which can simultaneously perform leakage detection from the outside to the inside and from the inside to the outside.
It realizes batch and two-way leak detection, avoids repeated disassembly and assembly operations, simplifies the detection process, meets the requirements of high-pressure testing, and improves detection efficiency and sealing.
Smart Images
Figure CN222887602U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of valve leakage detection, in particular to a bell-type leak rate detection device. Background Art
[0002] As a general mechanical product, valves are widely used in various fields. Due to long-term use, valves may have leakage problems, and their safety has always been the focus of people's attention.
[0003] Existing leak rate detection devices can only detect internal leakage rates, and the maximum pressure is 0.1 MPa, which cannot meet the detection requirements for external leakage of the valve body. Moreover, when batch-detecting multiple valves simultaneously, it is necessary to detect both external-to-internal leakage and internal-to-external leakage. However, existing leak rate detection devices can only perform one-way detection, that is, internal leakage detection. If two-way detection is required, the valves need to be repeatedly removed and reinstalled, which is very cumbersome. Summary of the Invention
[0004] Aiming at the above problems, the purpose of the utility model is to provide a bell-type leak rate detection device that can achieve batch detection of external-to-internal leakage and internal-to-external leakage.
[0005] To achieve the above purpose, the utility model adopts the following technical solutions: A bell-type leak rate detection device includes: a first test cavity for accommodating at least one valve to be detected; a second test cavity, the first end of which is sealed and communicated with the first end of the first test cavity, and a plurality of mounting holes are provided on the end face of the first end of the second test cavity for mounting the valves to be detected; a first ventilation hole provided at the center of the end face of the second end of the second test cavity; a second ventilation hole provided at the center of the end face of the second end of the first test cavity; wherein, both the first ventilation hole and the second ventilation hole can be used as an air inlet or an air outlet; and sealing plugs are provided on the remaining mounting holes without valves to seal them.
[0006] Further, the first test cavity includes a first bell and a flange cover;
[0007] The first bell adopts a hollow tubular structure with an I-shaped cross-section and both ends are open;
[0008] The outer edges of the open ends of the first end and the second end of the first bell are hermetically connected to the first end of the second test cavity and the flange cover through sealing rings and fasteners.
[0009] Further, a groove for accommodating the sealing ring is provided on the outer edge of the open ends of the first end and the second end of the first bell, and the cross-sectional shape of the groove corresponds to the cross-sectional shape of the sealing ring.
[0010] Further, the sealing ring is made of nitrile rubber material.
[0011] Furthermore, the sealing ring is an O-ring, a dovetail-shaped sealing ring or a V-shaped sealing ring, and the groove correspondingly adopts an O-shaped groove, a dovetail-shaped groove or a V-shaped groove.
[0012] Furthermore, a plurality of threaded holes are provided on the outer edges at the open ends of the first and second ends of the first bell jar, and a plurality of threaded holes are correspondingly provided on the first end of the second test cavity and the flange cover;
[0013] The outer edge of the open end of the first end of the first bell jar and the first end of the second test cavity, and the outer edge of the open end of the second end of the first bell jar and the flange cover are fixedly connected through a plurality of screws and threaded holes;
[0014] A second ventilation hole is provided at the central position of the flange cover.
[0015] Furthermore, the second test cavity is a second bell jar with an I-shaped cross-section;
[0016] The second bell jar adopts an integrally formed hollow tubular sealing structure, and a plurality of mounting holes are provided in the middle of the end face of the first end of the second bell jar for mounting the valve and / or the sealing plug to be detected;
[0017] A plurality of threaded holes are provided at the outer edge of the first end of the second bell jar, and a first ventilation hole is provided at the central position of the end face of the first end of the second bell jar.
[0018] Furthermore, each mounting hole adopts a stepped threaded hole; the mounting hole is hermetically connected to the inlet end or the outlet end of the valve to be detected, and a sealing ring is provided between the two.
[0019] Furthermore, both the first test cavity and the second test cavity are made of aluminum alloy material.
[0020] Furthermore, a gas source or a leak rate detection device is connected to the first ventilation hole and the second ventilation hole; when the valve is subjected to an outward-to-inward leak detection, the second ventilation hole is connected to the gas tank, and the first ventilation hole is connected to the airtightness detection device; when the valve is subjected to an inward-to-outward leak detection, the first ventilation hole is connected to the gas tank, and the second ventilation hole is connected to the airtightness detection device.
[0021] Due to the above technical solutions adopted by the present utility model, it has the following advantages:
[0022] 1. The present utility model can realize a device for batch detection and convenient detection of outward-to-inward leakage and inward-to-outward leakage.
[0023] 2. The present utility model adopts an aluminum alloy material, is light in weight, simple in operation, and can simultaneously meet the test pressure requirement of 3.5 MPa for outward leakage.
[0024] 3. The two test cavities of the present utility model are independently designed, achieving the efficient detection purpose of one-in-one-out and multi-point detection when detecting the leakage rate of the valve body. Description of the Drawings
[0025] Figure 1 It is a schematic diagram of the overall structure of the bell-type leakage rate detection device in an embodiment of the present utility model;
[0026] Reference numerals are:
[0027] 10 - First test cavity, 20 - Second test cavity, 11 - Flange cover, 12 - First bell, 121 - Sealing ring, 122 - Groove, 123 - Threaded hole, 13 - Second bell, 21 - Valve, 31 - First ventilation hole, 32 - Second ventilation hole, 33 - Mounting hole. Detailed Embodiment
[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the drawings of the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present utility model fall within the scope of protection of the present utility model.
[0029] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless otherwise clearly specified in the context, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0030] When detecting two valves 21 in batch simultaneously, it is necessary to detect the leakage from the outside to the inside and the leakage from the inside to the outside. However, in the prior art, only one-way detection can be performed, that is, the inward leakage detection. If two-way detection is required, the valve needs to be repeatedly removed and installed, and the operation is very cumbersome. Therefore, the present utility model provides a bell-type leakage rate detection device to achieve batch detection, and can detect the leakage from the outside to the inside and the leakage from the inside to the outside, avoiding the repeated and cumbersome disassembly and assembly operations, and saving a large amount of manpower and material resources.
[0031] Embodiment: As Figure 1 shown, this embodiment provides a bell-type leakage rate detection device. In this embodiment, the device includes:
[0032] A first test cavity 10 for accommodating at least one valve 21 to be detected;
[0033] The second test cavity 20 has its first end sealed and communicated with the first end of the first test cavity 10. A number of mounting holes 33 are provided on the end face of the first end of the second test cavity 20, and the mounting holes 33 are used to mount the valve 21 to be detected. Sealing plugs are provided on the remaining mounting holes 33 without the valve 21 installed for sealing;
[0034] The first ventilation hole 31 is provided at the center position of the end face of the second end of the second test cavity 20;
[0035] The second ventilation hole 32 is provided at the center position of the end face of the second end of the first test cavity 10;
[0036] Both the first ventilation hole 31 and the second ventilation hole 32 can be used as an air inlet or an air outlet.
[0037] During use, the valve 21 to be detected is hermetically installed in the first test cavity 10. When performing a leakage detection on the valve 21 from the outside to the inside, that is, a leakage detection from the inlet end to the outlet end of the valve 21, at this time, the first ventilation hole 31 serves as the air outlet hole and the second ventilation hole 32 serves as the air inlet hole; when performing a leakage detection on the valve 21 from the inside to the outside, that is, a leakage detection from the outlet end to the inlet end of the valve 21, at this time, the first ventilation hole 31 serves as the air inlet hole and the second ventilation hole 32 serves as the air outlet hole.
[0038] In an optional embodiment, the first test cavity 10 includes a first bell jar 12 and a flange cover 11. The first bell jar 12 adopts a hollow tubular structure with an I-shaped cross-section and both ends are open; the outer edges of the open ends of the first end and the second end of the first bell jar 12 are hermetically connected and fixed to the first end of the second test cavity 20 and the flange cover 11 through sealing rings 121 and fasteners.
[0039] In this embodiment, a groove 122 for accommodating the sealing ring 121 is provided on the outer edge of the open ends of the first end and the second end of the first bell jar 12, and the shape of the cross-section of the groove 122 corresponds to the shape of the cross-section of the sealing ring 121.
[0040] Optionally, the sealing ring 121 is preferably made of nitrile rubber material to effectively improve the sealing performance between the first bell jar 12 and the second test cavity 20 and the flange cover 11, and avoid leakage of the test gas, which may affect the detection result of the valve 21.
[0041] Optionally, the sealing ring 121 is preferably an O-ring, a dovetail-shaped sealing ring or a V-shaped sealing ring, etc., and the groove correspondingly adopts an O-shaped groove, a dovetail-shaped groove or a V-shaped groove, etc., to further enhance the sealing performance between the first bell jar 12 and the second test cavity 20 and the flange cover 11.
[0042] In this embodiment, the flange cover 11 serves as the second end face of the first test cavity 10, and a second ventilation hole 32 is provided at the center of the flange cover 11. During use, when the valve 21 is subjected to an outward-to-inward leakage detection, the second ventilation hole 32 serves as the air inlet hole, and when the valve 21 is subjected to an inward-to-outward leakage detection, the second ventilation hole 32 serves as the air outlet hole.
[0043] In this embodiment, the fastener is a screw. A plurality of threaded holes 123 are provided on the outer edges of the open ends of the first and second ends of the first bell jar 12; a plurality of threaded holes 123 are also correspondingly provided on the first end of the second test cavity 20 and the flange cover 11. The outer edge of the open end of the first end of the first bell jar 12 is fixedly connected to the first end of the second test cavity 20, and the outer edge of the open end of the second end of the first bell jar 12 is fixedly connected to the flange cover 11 through a plurality of screws and threaded holes.
[0044] To further ensure the sealing performance of the connection, the pitch of the threaded holes is preferably M22 or M33, and an O-ring seal is provided between the screw and the threaded hole for further sealing.
[0045] In an alternative embodiment, the second test cavity 20 can accommodate the test gas. The second test cavity 20 is a second bell jar 13 with an I-shaped cross-section, and the second bell jar 13 adopts an integrally formed hollow tubular sealing structure. A plurality of mounting holes 33 are provided in the middle of the first end face of the second bell jar 13 for mounting the valve 21 to be tested and / or the sealing plug. The sealing plug is hermetically connected to the mounting hole 33 by threads; a plurality of threaded holes 123 are provided at the outer edge of the first end of the second bell jar 13. A first ventilation hole 31 is provided at the center of the first end face of the second bell jar 13; during use, when the valve 21 is subjected to an outward-to-inward leakage detection, the first ventilation hole 31 serves as the air outlet hole, and when the valve 21 is subjected to an inward-to-outward leakage detection, the first ventilation hole 31 serves as the air inlet hole.
[0046] In this embodiment, the diameters of the plurality of mounting holes 33 are different to be used for mounting and detecting valves 21 with different inner diameters.
[0047] Among them, each mounting hole 33 is a stepped threaded hole. The large diameter of the stepped threaded hole is a threaded sealing hole for connecting with the valve 21 to be tested and / or the sealing plug, and the small diameter is a smooth hole; the mounting hole 33 is connected to the outlet end of the valve 21 to be tested. To ensure the sealing performance, a sealing ring can be provided between them. It should be noted that the structure of the mounting hole 33 in this embodiment can also adopt other structures such as threaded holes, which are not limited herein and can be adjusted according to actual needs.
[0048] In this embodiment, the sealing plug is preferably made of nitrile rubber material. Through the sealing plug, it can be ensured that the first test cavity 10 and the second test cavity 20 are not connected, and the two test cavities are two independent spaces, so that the air inlet hole and the air outlet hole during the test are not connected, effectively ensuring the sealing performance and accuracy of the test.
[0049] In the above embodiments, a partition can also be provided between the second test cavity 20 and the first test cavity 10 to further ensure that the two test cavities are two independent spaces.
[0050] In the above embodiments, the first bell jar 12, the flange cover 11 and the second bell jar 13 in the first test cavity 10 and the second test cavity 20 are all made of aluminum alloy material, which is light in weight and can meet the test pressure requirement of outward leakage of 3.5 MPa at the same time.
[0051] In the above embodiments, an air tank or a airtightness detection device is connected at the first ventilation hole 31 and the second ventilation hole 32. When the valve 21 performs an outward-to-inward leakage detection, the second ventilation hole 32 is connected to the gas source to supply the detection gas into the first test cavity 10, and the first ventilation hole 31 is connected to the leak rate detection device to detect and display the result in real time. When performing an inward-to-outward leakage detection on the valve 21, the first ventilation hole 31 is connected to the gas source to supply the detection gas into the second test cavity 20, and the second ventilation hole 32 is connected to the leak rate detection device to detect and display the result in real time to determine whether there is leakage.
[0052] In the above embodiments, the detection gas can be helium, and its maximum pressure is 3.5 MPa.
[0053] In summary, when the present utility model is used, the operation is simple, it can realize the detection of a batch of valves, and can realize the outward-to-inward leakage and inward-to-outward leakage detections, avoiding the repeated and cumbersome disassembly and assembly operations.
[0054] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims
1. A bell-shaped leak rate detection device, characterized in that: include: A first test chamber (10) for accommodating at least one valve (21) to be tested; A second test cavity (20), a first end of which is sealed and connected to the first end of the first test cavity (10), and a plurality of mounting holes (33) are provided on the first end surface of the second test cavity (20), wherein the mounting holes (33) are used to mount the valve (21) to be tested; A first vent hole (31) is arranged at a central position of a second end surface of the second test cavity (20); A second vent hole (32) is arranged at a central position of a second end surface of the first test cavity (10); The first vent hole (31) and the second vent hole (32) can both be used as an air inlet or an air outlet; and the remaining installation holes (33) without valves (21) are provided with sealing plugs for sealing.
2. The bell-shaped leak rate detection device according to claim 1, characterized in that: The first test chamber (10) comprises a first bell jar (12) and a flange cover (11); The first bell jar (12) is a hollow tubular structure with an I-shaped cross section and open at both ends; The outer edges of the first end and the second end of the first bell jar (12) at the open end are sealedly connected to the first end of the second test cavity (20) and the flange cover (11) through a sealing ring (121) and a fastener.
3. The bell-shaped leak rate detection device according to claim 2, characterized in that: A groove (122) for accommodating a sealing ring (121) is provided on the outer edges of the first end and the second end of the first bell jar (12), and the cross-sectional shape of the groove (122) is arranged to correspond to the cross-sectional shape of the sealing ring (121).
4. The bell-shaped leak rate detection device according to claim 3, characterized in that: The sealing ring (121) is made of nitrile rubber material.
5. The bell-shaped leak rate detection device according to claim 3, characterized in that: The sealing ring (121) is an O-shaped sealing ring, a dovetail-shaped sealing ring or a V-shaped sealing ring, and the groove is an O-shaped groove, a dovetail-shaped groove or a V-shaped groove.
6. The bell-shaped leak rate detection device according to claim 2, characterized in that: A plurality of threaded holes (123) are arranged on the outer edges of the first end and the second end of the first bell jar (12), and a plurality of threaded holes (123) are correspondingly arranged on the first end of the second test cavity (20) and the flange cover (11); The outer edge of the first open end of the first bell jar (12) and the first end of the second test cavity (20), and the outer edge of the second open end of the first bell jar (12) and the flange cover (11) are fixedly connected via a plurality of screws and threaded holes; A second vent hole (32) is provided at the center of the flange cover (11).
7. The bell-shaped leak rate detection device according to claim 1, characterized in that: The second test cavity (20) is a second bell jar (13) with an I-shaped cross section; The second bell jar (13) adopts an integrally formed hollow tubular sealing structure, and a plurality of mounting holes (33) are provided in the middle of the first end surface of the second bell jar (13) for mounting the valve (21) to be tested and / or the sealing plug; A plurality of threaded holes (123) are arranged at the outer edge of the first end of the second bell jar (13), and a first vent hole (31) is arranged at the center of the first end surface of the second bell jar (13).
8. The bell-shaped leak rate detection device according to claim 7, characterized in that: Each mounting hole (33) is a stepped threaded hole; The mounting hole (33) is sealedly connected to the inlet end or the outlet end of the valve to be tested (21), and a sealing ring is arranged between the two.
9. The bell-shaped leak rate detection device according to claim 1, characterized in that: The first test cavity (10) and the second test cavity (20) are both made of aluminum alloy material.
10. The bell-shaped leak rate detection device according to claim 1, characterized in that: An air source or a leakage rate detection device is connected to the first vent hole (31) and the second vent hole (32); When the valve (21) is tested for leakage from the outside to the inside, the second vent hole (32) is connected to the gas tank, and the first vent hole (31) is connected to an air tightness testing device; When the valve (21) is tested for leakage from the inside out, the first vent hole (31) is connected to the gas tank, and the second vent hole (32) is connected to an air tightness testing device.