Air tightness detection device

Abstract

The utility model relates to an air tightness detection device which is suitable for being installed at the two ends of a rubber capsule pipe and comprises two plug assemblies, an air nozzle and an air pressure detection device. The two plug assemblies are sleeved with the two ends of the rubber capsule pipe respectively, an air nozzle is arranged at the end, away from the rubber capsule pipe, of one plug assembly, and the end, away from the rubber capsule pipe, of the other plug assembly is fixedly connected with the air pressure detection device through a connecting pipeline. Each of the two plug assemblies comprises a sealing plug and a mounting joint; the rubber capsule pipe is arranged at one end of the installation connector in a sleeving mode, an installation groove is formed in the end, away from the rubber capsule pipe, of the installation connector, the sealing plug is embedded in the installation groove, the sealing plug is provided with a first cavity, a second cavity and a third cavity which are sequentially communicated, and the installation connector is provided with a fourth cavity which penetrates through the installation connector. The third chamber is communicated with the fourth chamber; one end of the air nozzle sequentially penetrates through the first cavity and the second cavity of one sealing plug and then stretches into the third cavity.

Description

Technical Field

[0001] This application relates to the field of rubber capsule tubing for acoustic logging tools, and more particularly to an airtightness testing device. Background Technology

[0002] In most current sonic logging instruments, the transmitting and receiving crystals typically use oil-filled rubber capsules as the coupling medium. However, during the production of these rubber capsules, manufacturing defects can occasionally lead to air leakage. If these potentially leaky rubber capsules are installed directly into the sonic logging instrument without undergoing airtightness testing and then used after oil filling, the leakage problem is usually only discovered after oil filling. The leaking oil can cause short circuits between electronic components within the sonic logging instrument, necessitating disassembly and repair, thus increasing maintenance costs. Summary of the Invention

[0003] In view of this, this application proposes an airtightness testing device suitable for installation at both ends of a rubber capsule tube, comprising: two plug assemblies, an air nozzle, and an air pressure testing device;

[0004] The two ends of the rubber capsule tube are respectively fitted onto two plug assemblies, and the two plug assemblies are arranged opposite each other; one plug assembly has an air nozzle at the end opposite to the rubber capsule tube, and the other plug assembly is fixedly connected to the air pressure detection device through a connecting pipe at the end opposite to the rubber capsule tube.

[0005] Both plug assemblies include: a sealing plug and an installation joint; a rubber capsule tube is sleeved on one end of the installation joint, and the end of the installation joint opposite to the rubber capsule tube has an installation groove, the sealing plug is embedded in the installation groove, the sealing plug has a first chamber, a second chamber and a third chamber connected in sequence, the installation joint has a fourth chamber and the fourth chamber passes through the installation joint, and the third chamber is connected to the fourth chamber;

[0006] One end of the nozzle passes through the first chamber and the second chamber of one of the sealing plugs and then extends into the third chamber. The nozzle is used to introduce detection gas into the rubber capsule tube. The first chamber of the other sealing plug is connected to the connecting pipe, and the detection gas flows to the pressure detection device through the connecting pipe.

[0007] In one possible implementation, a retaining ring is also included; the outer wall of the air nozzle is provided with external threads, the retaining ring is provided with internal threads, the retaining ring is threadedly connected to the air nozzle, and the retaining ring is located in the first chamber.

[0008] In one possible implementation, a first seal is provided on the outer wall of the air nozzle, and the seal is located in the second chamber.

[0009] In one possible implementation, a metal gasket is provided in the first chamber; the metal gasket is fitted onto the outer wall of the air nozzle, and the metal gasket is located on the side of the fixing ring facing the second chamber.

[0010] In one possible implementation, an O-ring is also included; the O-ring is located between the sealing plug and the mounting joint.

[0011] In one possible implementation, the main body of the mounting connector has a stepped structure.

[0012] In one possible implementation, two or more support portions are provided on the outer wall of the sealing plug; the two or more support portions are equidistantly arranged along the circumference of the sealing plug.

[0013] In one possible implementation, the air pressure detection device uses a barometer.

[0014] Beneficial effects of this application

[0015] By incorporating the airtightness testing device of this application, a comprehensive and rigorous airtightness test is conducted before installation, ensuring that the installed rubber capsule tube is leak-free. This effectively avoids oil waste and reduces operating costs. Compared to installation without prior testing, the airtightness testing device of this application effectively prevents the installation of rubber capsule tubes with potential leakage into the sonic logging tool. This solves the problem of short circuits in the instrument's electronic components caused by rubber capsule tube leakage, ensuring the normal operation of the instrument and reducing the need for disassembly and repair due to oil leakage, thus lowering maintenance costs.

[0016] Other features and aspects of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0017] The accompanying drawings, which are included in and form part of this specification, illustrate exemplary embodiments, features, and aspects of this application together with the specification and serve to explain the principles of this application.

[0018] Figure 1 This diagram shows the main structure of the airtightness testing device of this application;

[0019] Figure 2 Show Figure 1 A magnified view of a portion of the image;

[0020] Figure 3 A schematic diagram of the main structure of the mounting connector is shown;

[0021] Figure 4 A schematic diagram of the main structure of the sealing plug is shown. Detailed Implementation

[0022] Various exemplary embodiments, features, and aspects of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0023] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0026] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented without certain specific details. In some instances, methods, means, components, and circuits well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0027] This application discloses an airtightness testing device suitable for installation at both ends of a rubber capsule tube 500, such as... Figures 1 to 4As shown, it includes: two plug assemblies, an air nozzle 300, and a pressure detection device 400; both ends of the rubber capsule tube 500 are respectively fitted onto the two plug assemblies, and the two plug assemblies are arranged opposite each other. One plug assembly has an air nozzle 300 at the end opposite to the rubber capsule tube 500, and the other plug assembly is fixedly connected to the pressure detection device 400 via a connecting pipe 410 at the end opposite to the rubber capsule tube 500; each plug assembly includes: a sealing plug 100 and an installation joint 200; the rubber capsule tube 500 is fitted onto one end of the installation joint 200, and the end of the installation joint 200 opposite to the rubber capsule tube 500 has an installation groove 210, in which the sealing plug 100 is embedded. Inside 210, the sealing plug 100 has a first chamber 110, a second chamber 120, and a third chamber 130 connected in sequence. The mounting joint 200 has a fourth chamber 220, which passes through the mounting joint 200. The third chamber 130 is connected to the fourth chamber 220. One end of the air nozzle 300 passes through the first chamber 110 and the second chamber 120 of one of the sealing plugs 100 in sequence and then enters the third chamber 130. The air nozzle 300 is used to introduce detection gas into the rubber capsule tube 500. The first chamber 110 of the other sealing plug 100 is connected to the connecting pipe 410. The detection gas flows to the air pressure detection device 400 through the connecting pipe 410.

[0028] It should be noted that the plug assemblies are installed at both ends of the rubber capsule tube 500 to prevent gas leakage from both ends of the rubber capsule tube 500; this ensures that during the airtightness test, the gas can only flow inside the rubber capsule tube 500, thereby accurately assessing the airtightness of the rubber capsule tube 500; the air nozzle 300 is connected to an external air source for filling the rubber capsule tube 500 with gas; the air pressure detection device 400 is suitable for detecting changes in gas pressure inside the rubber capsule tube 500. By detecting the gas pressure inside the capsule tube in real time, it is possible to promptly detect and assess whether there are any leaks in the rubber capsule tube 500, ensuring that the airtightness performance of the rubber capsule tube 500 meets the requirements. Before installing the rubber capsule tube 500 into the sonic logging tool, gas enters the applied airtightness testing device through the gas nozzle 300. The gas flows into the rubber capsule tube 500 through the fourth chamber 220 of the mounting connector 200. The gas inside the rubber capsule tube 500 flows into the detection end of the gas detection device through the connecting pipe 410. When the gas pressure inside the rubber capsule tube 500 reaches the preset gas pressure value, the inflation operation is stopped. At this time, the preset gas pressure value detected by the gas pressure detection device 400 is used as the initial gas pressure value. The gas pressure detection device 400 monitors the gas pressure change inside the rubber capsule tube 500 in real time within a preset time. If the gas pressure value detected by the gas pressure detection device 400 remains consistent with the initial gas pressure value within the preset time, it is determined that the airtightness of the rubber capsule tube 500 is good and there is no leakage problem. Conversely, if the gas pressure value detected by the gas pressure detection device 400 gradually decreases, it is determined that there is a leakage problem in the rubber capsule tube 500.

[0029] The preset air pressure value is 0.5±0.05MPa, the preset time value is 5min, and the pressure does not decrease significantly.

[0030] By incorporating the airtightness testing device of this application, a comprehensive and rigorous airtightness test is conducted before installation, ensuring that the installed rubber capsule tube 500 is leak-free. This effectively avoids oil waste and reduces operating costs. Compared to installation without testing, the airtightness testing device of this application effectively prevents the installation of the rubber capsule tube 500, which may have leakage risks, into the sonic logging tool. This solves the problem of short circuits in the instrument's electronic components caused by leakage of the rubber capsule tube 500, ensuring the normal operation of the instrument, reducing the need for disassembly and repair due to oil leakage, and lowering maintenance costs.

[0031] like Figures 1 to 4As shown, the rubber capsule tube 500 is securely fitted onto one end of the mounting joint 200. The mounting groove 210 provides an installation position for the sealing plug 100. Internal threads are provided on the side wall of the mounting groove 210, and external threads are provided on the outer side wall of the sealing plug 100. The sealing plug 100 is threadedly connected to the mounting groove 210. This threaded connection design ensures that the sealing plug 100 and the mounting joint 200 together form a tight sealing structure, preventing gas inside the rubber capsule tube 500 from leaking through the connection between the sealing plug 100 and the mounting joint 200. When a leak occurs at the joint, the first chamber 110, the second chamber 120, and the third chamber 130 within the sealing plug 100 provide an installation position for the air nozzle 300. One end of the air nozzle 300 passes through the first chamber 110 and the second chamber 120 of one of the sealing plugs 100 in sequence and then extends into the third chamber 130 and communicates with the third chamber 130. An external air source is delivered to the third chamber 130 through the air nozzle 300, and the gas in the third chamber 130 enters the rubber capsule tube 500 through the fourth chamber 220 of the mounting connector 200.

[0032] Furthermore, the air valve 300 adopts the existing air valve technology, and the existing air valve 300 has a pressure relief function. After the rubber capsule tube 500 is tested, the pressure relief channel of the air valve 300 can be opened by the pressure relief gun to relieve the pressure of the rubber capsule tube 500.

[0033] Furthermore, such as Figure 1 As shown, one end of the connecting pipe 410 is provided with a first connecting part 411. The connecting pipe 410 is connected to the second chamber 120 of the sealing plug 100 through the first connecting part 411. The outer wall of the first connecting part 411 is provided with an external thread structure. The first chamber 110 of the sealing plug 100 is provided with an internal thread that matches the external thread structure. The first connecting part 411 extends into the first chamber 110 of the sealing plug 100 and is threadedly connected to the sealing plug 100. One end of the connecting pipe 410 connected to the air pressure detection device 400 is provided with a second connecting part 412. The connecting pipe 410 is connected to the detection end of the air pressure detection device 400 through the second connecting part 412. The inner wall of the second connecting part 412 is provided with an internal thread. The detection end of the air pressure detection device 400 is provided with an external thread that matches the internal thread. The detection end of the air pressure detection device 400 extends into the cavity of the second connecting part 412 and is threadedly connected to the second connecting part 412.

[0034] In one possible implementation, a third seal (not shown in the figure) is provided in the first chamber 110. The main body of the third seal is a hollow sheet structure. The third seal is located between the second chamber and the first connecting part 411. By twisting the first connecting part 411, the first connecting part 411 applies pressure to the third seal, thereby making the third seal tightly fit at the connection between the first connecting part 411, the first chamber 110 and the second chamber 120. This prevents gas from flowing into the connecting pipe 410 through the first connecting part 411 in the second chamber 120 from leaking from the connection between the first connecting part 411, the first chamber 110 and the second chamber 120, thus ensuring the accuracy of the detection.

[0035] In one possible implementation, a fourth seal (not shown in the figure) is provided in the second connection part 412. The fourth seal has the same structure as the third seal and is used to prevent gas leakage from the connection between the second connection part 412 and the detection end of the pressure detection device 400 when the gas in the connecting pipe 410 flows to the pressure detection device 400 through the second connection part 412, thus ensuring the accuracy of the detection.

[0036] Preferably, the third and fourth sealing elements are both made of copper gaskets or polytetrafluoroethylene gaskets, which are existing technologies.

[0037] In one possible implementation, the air pressure detection device 400 employs a barometer.

[0038] In one possible implementation, a retaining ring 310 is also included; the outer wall of the air nozzle 300 is provided with an external thread, the retaining ring 310 is provided with an internal thread, the retaining ring 310 is threadedly connected to the air nozzle 300, and the retaining ring 310 is located in the first chamber 110.

[0039] It should be noted here that, as Figure 1 Figure 2 As shown, the end of the air nozzle 300 that extends into the third chamber 130 is provided with a top cap. The diameter of the top cap is larger than the diameter of the second chamber 120 and smaller than the diameter of the third chamber 130, which prevents the air nozzle 300 from falling out of the sealing plug 100. The outer wall of the air nozzle 300 is provided with external threads. The main body of the fixing ring 310 is a hollow columnar structure. The inner wall of the fixing ring 310 is provided with matching internal threads. The fixing ring 310 is sleeved on the air nozzle 300 and threadedly connected to the air nozzle 300. The diameter of the fixing ring 310 is larger than the diameter of the second chamber 120 and smaller than the diameter of the first chamber 110. By rotating the fixing ring 310, the fixing ring 310 moves closer to the top cap along the axial direction of the air nozzle 300. The fixing ring 310 and the top cap cooperate with each other, thereby fixing the air nozzle 300 in the sealing plug 100.

[0040] In one possible implementation, such as Figure 1 , Figure 2 As shown, a first sealing element 320 is provided on the outer wall of the air nozzle 300, and the sealing element is located inside the second chamber 120. It should be noted that the outer contour of the first sealing element 320 matches the inner wall of the second chamber 120. The first sealing element 320 is sleeved on the outer wall of the air nozzle 300 and tightly fitted to the inner wall of the second chamber 120. The first sealing element 320 provides a sealing barrier between the air nozzle 300 and the second chamber 120, preventing gas from leaking from the gap between the air nozzle 300 and the second chamber 120.

[0041] Furthermore, the first seal 320 is made of an elastic material. The elastic first seal 320 can automatically adjust its shape according to the shape and size of the air nozzle 300 and the second chamber 120 to ensure that the first seal 320 forms a tight fit with the inner wall of the air nozzle 300 and the second chamber 120, thereby achieving a good sealing effect and preventing gas leakage.

[0042] Furthermore, such as Figure 2 As shown, it also includes a second sealing element 330, which is made of an elastic material. The second sealing element 330 is sleeved on the outer wall of the air nozzle 300, and the second sealing element 330 is located on the side of the fixing ring 310 facing the second chamber 120. By twisting the fixing ring 310, the fixing ring 310 applies pressure to the second sealing element 330, thereby causing the second sealing element 330 to deform. This makes the second sealing element 330 fit tightly against the connection between the air nozzle 300, the first chamber 110 and the second chamber 120, further enhancing the sealing effect and preventing leakage from the gap between the gas nozzle 300, the first chamber 110 and the second chamber 120.

[0043] Preferably, the second seal 330 is a sealing gasket as used in the prior art.

[0044] In one possible implementation, such as Figure 2 As shown, a metal gasket 340 is provided in the first chamber 110; the metal gasket 340 is sleeved on the outer wall of the air nozzle 300, and the metal gasket 340 is located on the side of the fixing ring 310 facing the second chamber 120. Its two sides abut against the first sealing member 320 and the fixing ring 310, respectively.

[0045] It should be noted that the metal gasket 340 is sleeved on the outer wall of the air nozzle 300 and is located between the second seal 330 and the retaining ring 310. When the retaining ring 310 applies pressure to the metal gasket 340, the metal gasket 340 can evenly transmit the pressure to the second seal 330. The metal gasket 340 and the second seal 330 work together under the pressure of the retaining ring 310. The rigidity and uniform pressure transmission characteristics of the metal gasket 340 are combined with the deformable sealing characteristics of the second seal 330 to form a complementary sealing structure. The metal gasket 340 ensures effective pressure transmission and uniform distribution, while the second seal 330 uses its own deformation to fill the gap around the air nozzle 300, further enhancing the sealing effect and preventing leakage at the gap between the gas nozzle 300, the first chamber 110 and the second chamber 120.

[0046] In one possible implementation, such as Figure 1 As shown, it also includes an O-ring 140; the O-ring 140 is located between the sealing plug 100 and the mounting joint 200.

[0047] It should be noted that the O-ring 140 is made of elastic material. The O-ring 140 is used to improve the sealing performance between the sealing plug 100 and the mounting joint 200. A sealing groove is formed on the outer wall of the sealing plug 100. The O-ring 140 is sleeved on the outer wall of the sealing plug 100 and located in the sealing groove. The volume of the O-ring 140 is larger than the volume of the sealing groove. When the sealing plug 100 and the mounting joint 200 are threadedly connected, the O-ring 140 fills the gap between the sealing groove and the gap between the sealing plug 100 and the mounting joint 200, preventing gas from leaking from the gap between the sealing plug 100 and the mounting joint 200.

[0048] In one possible implementation, such as Figure 3 As shown, the main body of the mounting connector 200 has a stepped structure. It should be noted that the stepped structure design allows the mounting connector 200 to be adapted to various sizes of rubber capsule tubes 500, improving the compatibility of the airtightness testing device. At the same time, enterprises do not need to purchase different connectors for different sizes of rubber capsule tubes 500, reducing the procurement quantity and inventory of mounting connectors 200, and further saving costs.

[0049] Furthermore, fasteners (not shown in the figure) are fitted on the rubber capsule tube 500, and clamps are located at the connection between the rubber capsule tube 500 and the mounting joint 200. The clamps provide additional tightening force to prevent the rubber capsule tube 500 from falling off the mounting joint 200, thus ensuring the stability of the connection between the rubber capsule tube 500 and the mounting joint 200.

[0050] Preferably, the fastener is a clamp as used in the prior art.

[0051] In one possible implementation, such as Figure 1 , Figure 2 As shown, the outer wall of the sealing plug 100 is provided with two or more support portions 150; the two or more support portions 150 are equidistantly arranged along the circumference of the sealing plug 100. It should be noted that the outer wall of the sealing plug 100 has two or more threaded holes, which are equidistantly arranged along the circumference of the sealing plug 100 and match the support portions 150. The support portions 150 are threadedly connected to the sealing plug 100 through the threaded holes. The support portions 150 are suitable for supporting the airtightness testing device. When the airtightness testing device is inflating the rubber capsule tube 500, the rapid inflating of gas will generate a certain reaction force. By providing the support portions 150, the support portions 150 provide a stable support point for the airtightness testing device, effectively limiting the displacement or rotation of the airtightness testing device due to the reaction force during inflation, ensuring that the airtightness testing device always remains in the predetermined position, and guaranteeing the accuracy of the test.

[0052] Preferably, the third and fourth sealing elements are both copper gaskets or polytetrafluoroethylene gaskets in the prior art.

[0053] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. An airtightness testing device, suitable for installation at both ends of a rubber capsule tube, characterized in that, include: Two plug assemblies, an air nozzle, and an air pressure detection device; The two ends of the rubber capsule tube are respectively fitted onto the two plug assemblies, and the two plug assemblies are arranged opposite to each other; one of the plug assemblies has the air nozzle at the end opposite to the rubber capsule tube, and the other plug assembly is fixedly connected to the air pressure detection device at the end opposite to the rubber capsule tube through a connecting pipe. Both of the plug assemblies include: a sealing plug and a mounting joint; the rubber capsule tube is sleeved on one end of the mounting joint, the end of the mounting joint opposite to the rubber capsule tube has a mounting groove, the sealing plug is embedded in the mounting groove, the sealing plug has a first chamber, a second chamber and a third chamber connected in sequence, the mounting joint has a fourth chamber and the fourth chamber passes through the mounting joint, and the third chamber communicates with the fourth chamber; One end of the nozzle passes through the first chamber and the second chamber of one of the sealing plugs in sequence and then extends into the third chamber. The nozzle is suitable for introducing detection gas into the rubber capsule tube. The first chamber of the other sealing plug is connected to the connecting pipe, and the detection gas flows to the air pressure detection device through the connecting pipe.

2. The airtightness testing device according to claim 1, characterized in that, It also includes a retaining ring; The outer wall of the air nozzle is provided with an external thread, and the inside of the fixing ring is provided with an internal thread. The fixing ring is threadedly connected to the air nozzle, and the fixing ring is located in the first cavity.

3. The airtightness testing device according to claim 1, characterized in that, The outer wall of the air nozzle is provided with a first sealing element, and the sealing element is located in the second cavity.

4. The airtightness testing device according to claim 2, characterized in that, The first chamber is equipped with a metal gasket; The metal gasket is fitted onto the outer wall of the air nozzle, and the metal gasket is located on the side of the fixing ring facing the second chamber.

5. The airtightness testing device according to claim 1, characterized in that, Also includes O-rings; The O-ring is located between the sealing plug and the mounting joint.

6. The airtightness testing device according to claim 1, characterized in that, The main body of the mounting joint has a stepped structure.

7. The airtightness testing device according to claim 1, characterized in that, The sealing plug has two or more support portions on its outer side wall; Two or more of the support portions are equidistant from each other along the circumference of the sealing plug.

8. The airtightness testing device according to claim 1, characterized in that, The air pressure detection device uses an air pressure gauge.

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