Threaded safety valve clamping device with sealing function

Abstract

The utility model discloses a threaded safety valve clamping device with a sealing function, and relates to the technical field of safety valve verification. The clamping device comprises a fixing assembly, the fixing assembly comprises a fixing piece and a tool piece, the tool piece is fixedly installed in the fixing piece, the tool piece is provided with a positioning groove, the positioning groove is used for fixing the threaded safety valve, the fixing piece is provided with an air inlet port, and the two ends of the air inlet port are communicated with the positioning groove and a checking table air channel respectively. The sealing assembly is arranged in the tool piece, and the sealing assembly is arranged on the peripheral side of the threaded safety valve in a surrounding mode; and one end of the driving mechanism is fixedly connected with the threaded safety valve, and the driving mechanism is used for driving the threaded safety valve to move between a clamping state in which the threaded safety valve is fixed in the positioning groove and a taking-out state in which the threaded safety valve is far away from the positioning groove so as to verify the threaded safety valve in the clamping state. According to the clamping device, the sealing effect and the verification efficiency can be improved, and the situation that threads are damaged in the thread tightening process is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of safety valve calibration, and particularly relates to a threaded safety valve clamping device with a sealing function. Background Art

[0002] As special equipment for gas transportation or storage, air storage tanks or gas cylinders are equipped with safety valves to ensure their safe use. As an accessory of special equipment, the safety valve is a safety protection device for pressure-bearing equipment, and its performance directly affects the operation safety of the system and equipment.

[0003] In the prior art, most safety valves are thread-connected. Therefore, when calibrating the safety valve, it is necessary to fix the safety valve to the calibration table and ensure the reliability of the seal during calibration. At present, a simple thread connection tooling is usually used to fix the safety valve during the calibration process. Before calibration, the safety valve calibrator first selects a connection tooling with the same thread as the safety valve to be tested, fixes the safety valve on the clamping table through the clamping jaws of the clamping table, then winds sealing raw tape on the connection thread of the safety valve to be tested, and tightens it on the connection tooling of the calibration table with a wrench. After calibration, the safety valve is removed and the remaining raw tape is removed. The calibration device in the prior art needs to manually wind the raw tape to ensure the sealing performance during the calibration process and manually remove the raw tape after calibration, resulting in low calibration work efficiency. And when manually tightening the thread, in order to ensure the sealing performance, the thread is often deformed due to excessive torque, thereby damaging the thread of the safety valve. Summary of the Utility Model

[0004] An object of the utility model is to provide a threaded safety valve clamping device with a sealing function, so as to solve the technical problems of low efficiency and easy damage to the thread in the prior art during the calibration of the safety valve.

[0005] Another object of the utility model is to improve the sealing performance of the clamping device.

[0006] According to the object of the utility model, the utility model provides a threaded safety valve clamping device with a sealing function, which comprises:

[0007] A fixing component, comprising a fixing piece and a tooling piece, the tooling piece is fixedly installed in the fixing piece, the tooling piece has a positioning groove for fixing the threaded safety valve, the fixing piece has an air inlet port, and both ends of the air inlet port are communicated with the positioning groove and the air circuit of the calibration table;

[0008] A sealing component, arranged in the tooling piece, and the sealing component is arranged to surround the circumferential side of the threaded safety valve;

[0009] A driving mechanism, one end of which is fixedly connected to the threaded safety valve, and the driving mechanism is used to drive the threaded safety valve to move between a clamped state fixed in the positioning groove and a removed state away from the positioning groove, so as to calibrate the threaded safety valve in the clamped state.

[0010] Optionally, the sealing assembly further includes:

[0011] A first seal, arranged to surround the periphery of the positioning groove, and the top surface of the first seal is arranged to abut against the step surface of the threaded safety valve;

[0012] A second seal, arranged to surround the periphery of the valve body of the threaded safety valve, and the second seal cooperates with the first seal to form a double seal within the tooling part;

[0013] The step surface is formed at the bottom of the valve body.

[0014] Optionally, the tooling part includes:

[0015] A first limiting groove for limiting the first seal;

[0016] A second limiting groove for limiting the second seal, and the first limiting groove and the second limiting groove are arranged in a stepped manner.

[0017] Optionally, the thickness of the first seal is greater than the depth of the first limiting groove.

[0018] Optionally, the second seal is a lip seal.

[0019] Optionally, the sealing assembly further includes:

[0020] A pressing plate, located at the top of the tooling part, and the pressing plate is arranged to be fixedly connected to the tooling part.

[0021] Optionally, the driving mechanism is a cylinder.

[0022] Optionally, the fixing assembly further includes:

[0023] A bottom plate, located at the bottom of the fixing part, and the bottom plate has an air inlet groove, and the calibration table air circuit is fixedly connected to the air inlet groove.

[0024] Optionally, the clamping device further includes:

[0025] A third seal, arranged between the fixing part and the bottom plate.

[0026] Optionally, the clamping device further includes:

[0027] The connecting block is located between the bottom of the driving mechanism and the threaded safety valve.

[0028] By providing a fixedly connected fixing member and a tooling member, a sealing assembly for sealing the threaded safety valve is provided inside the tooling member, and a driving mechanism for driving the threaded safety valve to move and be fixed in the positioning groove is provided, so that the threaded safety valve directly enters the positioning groove of the tooling member under the drive of the driving mechanism, and the threaded safety valve abuts against the sealing assembly inside the tooling member to ensure the sealing performance inside the tooling member. At the same time, the driving mechanism drives the threaded safety valve to be pressed into the tooling member downward, preventing the threaded safety valve from being deformed due to manual tightening of the threaded safety valve on the calibration table. That is, the clamping device in this embodiment can improve efficiency, ensure the sealing performance, and effectively avoid the situation of damaging the thread due to excessive torque caused by manual tightening of the thread.

[0029] Furthermore, the sealing assembly of the clamping device of the present invention further includes a first sealing member and a second sealing member. The first sealing member is arranged to surround the periphery of the positioning groove, and the top surface of the first sealing member is arranged to abut against the step surface of the threaded safety valve. The second sealing member is arranged to surround the periphery of the valve body of the threaded safety valve. The second sealing member cooperates with the first sealing member to form a double seal inside the tooling member. A step surface is formed at the bottom of the valve body, which improves the sealing performance of the clamping device, ensures the sealing performance during the calibration process, and effectively reduces the process of manually winding and removing the raw material tape for thread sealing in the prior art, improving the working efficiency of the clamping device.

[0030] The above description is only an overview of the technical solution of the present invention. In order to be able to understand the technical means of the present invention more clearly and implement it according to the content of the specification, the following takes the preferred embodiments of the present invention and describes them in detail with reference to the accompanying drawings as follows. Description of the Drawings

[0031] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary but non-limiting manner with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar components or parts. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0032] Figure 1 is a schematic structural diagram of a clamping device according to an embodiment of the present invention;

[0033] Figure 2 is a schematic cross-sectional view of a clamping device according to an embodiment of the present invention;

[0034] Figure 3 is Figure 2 a schematic partial enlarged view of the place shown at A.

[0035] Reference Numerals:

[0036] 100 - Clamping device, 200 - Threaded safety valve, 210 - Valve body, 211 - Step surface, 220 - Threaded end, 10 - Fixed assembly, 11 - Fixed part, 12 - Tooling part, 13 - Base plate, 121 - Positioning groove, 122 - Air inlet port, 123 - First limiting groove, 124 - Second limiting groove, 131 - Air inlet groove, 20 - Sealing assembly, 21 - First seal, 22 - Second seal, 23 - Pressure plate, 30 - Driving mechanism, 40 - Third seal, 50 - Connecting block. Detailed implementation manners

[0037] The following will further describe in detail the specific implementation manners of the present utility model in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0038] To make the above - mentioned objects, features and advantages of the present application more obvious and understandable, the following will describe in detail the specific implementation manners of the present application in conjunction with the accompanying drawings. It can be understood that the specific embodiments described herein are only used to explain the present application, rather than limiting the present application. Additionally, it should be noted that for the sake of convenience of description, only parts related to the present application rather than all structures are shown in the accompanying drawings. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0039] The terms "including" and "having" and any variations thereof in the present application are intended to cover non - exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products or devices.

[0040] Referring to "embodiments" herein means that the specific features, structures or characteristics described in conjunction with the embodiments can be included in at least one embodiment of the present application. The phrase appears in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0041] Figure 1 is a schematic structural diagram of a clamping device according to an embodiment of the present utility model, Figure 2 is a schematic cross - sectional view of a clamping device according to an embodiment of the present utility model, Figure 3 is Figure 2 a schematic partial enlarged view of the location A shown.

[0042] As shown Figure 2 in the figure, the utility model provides a clamping device 100 for a threaded safety valve 200. The clamping device 100 includes a fixing component 10, a sealing component 20 and a driving mechanism 30. The fixing component 10 includes a fixing piece 11 and a tooling piece 12. The tooling piece 12 is fixedly installed in the fixing piece 11. The tooling piece 12 has a positioning groove 121 for fixing the threaded safety valve 200. The fixing piece 11 has an air inlet port 122. Both ends of the air inlet port 122 are communicated with the positioning groove 121 and the air path of the calibration bench respectively. The sealing component 20 is arranged in the tooling piece 12 (refer to Figure 3 ), and the sealing component 20 is arranged to surround the circumferential side of the threaded safety valve 200. One end of the driving mechanism 30 is fixedly connected to the threaded safety valve 200. The driving mechanism 30 is used to drive the threaded safety valve 200 to move between a clamping state fixed in the positioning groove 121 and a taking-out state away from the positioning groove 121, so that the threaded safety valve 200 can enter or exit the positioning groove 121. Here, the diameter of the positioning groove 121 is larger than the diameter of the threaded end 220 of the threaded safety valve 200, and the depth of the positioning groove 121 is greater than the length of the threaded end 220 of the threaded safety valve 200.

[0043] In this embodiment, by setting the fixedly connected fixing piece 11 and tooling piece 12, a sealing component 20 for sealing the threaded safety valve 200 is arranged in the tooling piece 12, and a driving mechanism 30 for driving the threaded safety valve 200 to move and be fixed in the positioning groove 121 is set, so that the threaded safety valve 200 directly enters the positioning groove 121 of the tooling piece 12 under the drive of the driving mechanism 30, and the threaded safety valve 200 abuts against the sealing component 20 in the tooling piece 12 to ensure the sealing performance in the tooling piece 12. At the same time, the driving mechanism 30 drives the threaded safety valve 200 to be pressed into the tooling piece 12 downward, preventing the threaded safety valve 200 from being deformed due to manually tightening the threaded safety valve 200 to be fixed on the calibration bench. That is, the clamping device 100 in this embodiment can improve the efficiency, ensure the sealing performance, and effectively avoid the situation of damaging the thread due to excessive torque caused by manual tightening.

[0044] In this embodiment, the fixing piece 11 and the tooling piece 12 adopt an interference fit, without bolt fixation, and the positioning groove 121 of the tooling piece 12 can be designed according to the diameters of different threaded safety valves 200, so as to facilitate the replacement of the tooling piece 12 and improve the use convenience of the clamping device 100.

[0045] As shown Figure 3As shown, in a further embodiment, the sealing assembly 20 further includes a first seal 21 and a second seal 22. The first seal 21 is arranged to surround the circumferential side of the positioning groove 121, and the top surface of the first seal 21 is arranged to abut against the stepped surface 211 of the threaded safety valve 200. The second seal 22 is arranged to surround the circumferential side of the valve body 210 of the threaded safety valve 200. The second seal 22 cooperates with the first seal 21 to form a double seal within the tooling part 12. A stepped surface 211 is formed at the bottom of the valve body 210. In this embodiment, the threaded safety valve 200 includes a threaded end 220 and a valve body 210. The threaded end 220 is located at the bottom of the valve body 210, and the diameter of the threaded end 220 is smaller than the diameter of the valve body 210, so as to form a stepped surface 211 at the bottom of the valve body 210. The first seal 21 is arranged to surround the circumferential side of the threaded end 220, and the top of the first seal 21 abuts against the stepped surface 211 of the valve body 210 to form a first sealing surface. The second seal 22 is arranged to surround the circumferential side of the valve body 210, and the inner diameter of the second seal 22 is smaller than or equal to the diameter of the valve body 210, so that the second seal 22 abuts against the outer periphery of the valve body 210 to form a second sealing surface. The first seal 21 and the second seal 22 cooperate to form the sealing assembly 20 to double-seal the threaded safety valve 200, improving the sealing performance of the clamping device 100, ensuring the sealing property during the calibration process, and effectively reducing the process of manually winding and removing the raw material tape for thread sealing in the prior art, thus improving the working efficiency of the clamping device 100. Here, the diameter of the first seal 21 is smaller than the diameter of the second seal 22.

[0046] As Figure 3As shown, in a further embodiment, the tooling part 12 includes a first limiting groove 123 and a second limiting groove 124. The first limiting groove 123 is used to limit the first seal 21, and the second limiting groove 124 is used to limit the second seal 22. The first limiting groove 123 and the second limiting groove 124 are arranged in a stepped shape. In this embodiment, the first limiting groove 123 surrounds the periphery of the positioning groove 121, and the top surface of the first positioning groove 121 is flush with the top surface of the positioning groove 121. The first seal 21 is located in the first limiting groove 123, so that the inner side of the first seal 21 abuts against the threaded end 220, and the top surface of the first seal 21 abuts against the step surface 211 of the valve body 210 of the threaded safety valve 200, so that the first seal 21 and the threaded safety valve 200 form a plurality of sealing surfaces. The second limiting groove 124 is located above the first limiting groove 123, and the inner circle diameter of the second limiting groove 124 is equal to the outer circle diameter of the first limiting groove 123, that is, the first limiting groove 123 and the second limiting groove 124 cooperate to form a stepped structure, that is, the first seal 21 and the second seal 22 cooperate with the threaded safety valve 200 to form a stepped seal with a plurality of sealing surfaces, thereby realizing the double sealing effect of the clamping device 100 and ensuring the sealing performance of the clamping device 100.

[0047] In a further embodiment, the thickness of the first seal 21 is greater than the depth of the first limiting groove 123. In this embodiment, the thickness of the first seal 21 is greater than the depth of the first limiting groove 123, so that after the first seal 21 is installed in the first limiting groove 123 and the threaded safety valve 200 is pressed into the positioning groove 121, the step surface 211 of the threaded safety valve 200 abuts against the top of the first seal 21, so that the sealing surface of the first seal 21 fits more closely with the threaded end 220 of the threaded safety valve 200 after being pressed, thereby enhancing the sealing performance of the sealing assembly 20.

[0048] In a further embodiment, the second seal 22 is a PTFE-coated seal ring. In this embodiment, the second seal 22 is a PTFE-coated seal ring. The PTFE-coated seal ring can maintain good sealing performance under both high-pressure and low-pressure conditions, effectively preventing gas leakage, and is suitable for devices with high sealing performance. Even in a non-pressure or micro-pressure state, the PTFE-coated seal ring can provide a stable sealing effect. The PTFE-coated seal ring can effectively resist wear during long-term use, that is, in an environment of high-frequency reciprocating motion, it has a long service life. Even if wear occurs during use, it can maintain the sealing effect through the automatic compensation of the spring, thereby extending the service life. In addition, the PTFE-coated seal ring can select appropriate materials and structural designs according to different working conditions.

[0049] As Figure 2As shown, in a further embodiment, the sealing assembly 20 further includes a pressing plate 23. The pressing plate 23 is located at the top of the tooling part 12 and is configured to be fixedly connected to the tooling part 12. In this embodiment, the presence of the pressing plate 23 can more effectively transfer the externally applied pressure to the lip seal, making the sealing lip of the lip seal fit more closely to the sealing surface, thereby enhancing the sealing effect. Additionally, the pressing plate 23 can compensate for the increased sealing gap caused by wear or deformation of the lip seal by applying a certain pressure, maintaining the stability and reliability of the sealing effect. The pressing plate 23 can firmly fix the lip seal in the second limiting groove 124, preventing it from shifting or falling off during operation, helping to ensure the overall stability and reliability of the sealing system, and reducing the risk of seal failure caused by impact loads. At the same time, when installing the second seal 22, first place the lip seal in the second limiting groove 124 and fix it with the pressing plate 23. The installation is convenient and fast, and helps to ensure the accuracy and reliability of the installation.

[0050] In a further embodiment, the driving mechanism 30 is a cylinder. In this embodiment, as the driving mechanism 30, the cylinder can ensure precise position control and force control during the process of pressing the threaded safety valve 200 into the positioning groove 121 and the sealing assembly 20, helping to reduce the risk of poor sealing or damage to the tooling part 12 caused by improper operation or insufficient accuracy. Moreover, the cylinder has a fast response speed and can complete the pressing action of the threaded safety valve 200 in a short time, improving the installation efficiency and calibration speed of the clamping device 100. In addition, during operation, due to its relatively simple and stable structure, the cylinder can maintain high working stability, helping to ensure that the threaded safety valve 200 will not deviate from the predetermined trajectory due to external forces or vibrations during the pressing process.

[0051] As Figure 1 As shown, in a further embodiment, the fixing assembly 10 further includes a bottom plate 13. The bottom plate 13 is located at the bottom of the fixing member 11 and has an air inlet groove 131. The calibration table air circuit is fixedly connected to the air inlet groove 131. In this embodiment, the bottom plate 13 is provided with a through air inlet groove 131. The two ends of the air inlet groove 131 are respectively communicated with the air inlet port 122 and the calibration table air circuit, and the air inlet groove 131 is provided with threads that cooperate with the calibration air circuit, so that the calibration air circuit is fixedly connected to the bottom plate 13 by threads, ensuring the sealing performance between the calibration air circuit and the fixing assembly 10. Here, the diameter of the air inlet groove 131 is larger than the diameter of the air inlet port 122. The clamping device 100 further includes a mounting bracket, one end of which is fixedly mounted on the bottom plate 13 and the other end is fixedly mounted with the driving mechanism 30.

[0052] In a further embodiment, the clamping device 100 further includes a third seal 40 disposed between the fixing member 11 and the base plate 13. In this embodiment, the third seal 40 is disposed between the fixing plate and the base plate 13, that is, between the air inlet port 122 and the air inlet groove 131, to ensure the sealing performance between the base plate 13 and the fixing member 11, thereby further improving the airtightness of the clamping device 100 during the calibration process.

[0053] In a further embodiment, the clamping device 100 further includes a connecting block 50 located between the bottom of the driving mechanism 30 and the threaded safety valve 200. In this embodiment, the clamping device 100 further includes a connecting block 50 for connecting the driving mechanism 30 and the threaded safety valve 200. Both ends of the connecting block 50 are respectively connected to the driving mechanism 30 and the threaded safety valve 200, so that when the driving mechanism 30 drives the connecting block 50 to move up and down, it drives the threaded safety valve 200 to move down into the workpiece 12, or drives the threaded safety valve 200 to move up to a position separated from the fixing assembly 10. And the connecting block 50 is internally provided with an exhaust hole for discharging test gas during the sealing test of the threaded safety valve 200. That is, the connecting block 50 can not only drive the threaded safety valve 200 to move under the drive of the driving mechanism 30, but also exhaust in time to avoid potential safety hazards caused by excessive internal pressure of the threaded safety valve 200 during the calibration process.

[0054] In this embodiment, the calibration process of the threaded safety valve 200 is as follows: First, the fixing assembly 10 and the driving mechanism 30 are installed on the base plate 13. The first seal 21 and the second seal 22 are respectively installed in the first limiting groove 123 and the second limiting groove 124. The driving mechanism 30 is connected to the threaded safety valve 200 to be calibrated through the connecting block 50, and drives the threaded safety valve 200 to be calibrated to move down into the sealing assembly 20 in the workpiece 12. Then, the pressing plate 23 is fixedly connected to the workpiece. The gas in the calibration bench air circuit sequentially flows through the air inlet groove 131, the air inlet port 122, the positioning groove 121, the vent hole of the threaded safety valve 200, and the exhaust hole of the connecting block 50 to realize the calibration of the threaded safety valve 200. After the calibration is completed, the driving mechanism 30 is driven to drive the threaded safety valve 200 to separate from the workpiece 12, improving the calibration efficiency and operation simplicity of the inspection device.

[0055] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

[0056] The above-described embodiments merely represent several implementation manners of the present utility model. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all fall within the protection scope of the present utility model. Therefore, the protection scope of the present utility model patent shall be subject to the appended claims.

Claims

1. A clamping device for a threaded safety valve with a sealing function, characterized in that, Comprising: A fixing component, including a fixing piece and a tooling piece. The tooling piece is fixedly installed within the fixing piece. The tooling piece has a positioning groove for fixing a threaded safety valve. The fixing piece has an air inlet port, and both ends of the air inlet port are in air circuit communication with the positioning groove and the calibration bench respectively; A sealing component, disposed within the tooling piece, and the sealing component is arranged to surround the circumferential side of the threaded safety valve; A driving mechanism, one end of which is fixedly connected to the threaded safety valve. The driving mechanism is used to drive the threaded safety valve to move between a clamped state fixed in the positioning groove and a removed state away from the positioning groove, so as to calibrate the threaded safety valve in the clamped state.

2. The clamping device according to claim 1, characterized in that, The sealing component further includes: A first sealing member, arranged to surround the circumferential side of the positioning groove, and the top surface of the first sealing member is arranged to abut against the step surface of the threaded safety valve; A second sealing member, arranged to surround the circumferential side of the valve body of the threaded safety valve. The second sealing member cooperates with the first sealing member to form a double seal within the tooling piece; The bottom of the valve body forms the step surface.

3. The clamping device according to claim 2, characterized in that, The tooling piece includes: A first limiting groove for limiting the first sealing member; A second limiting groove for limiting the second sealing member. The first limiting groove and the second limiting groove are arranged in a stepped manner.

4. The clamping device according to claim 3, wherein The thickness of the first sealing member is greater than the depth of the first limiting groove.

5. The clamping device according to claim 4, wherein The second sealing member is a lip seal.

6. The clamping device according to claim 5, characterized in that, The sealing component further includes: A pressing plate, located at the top of the tooling piece, and the pressing plate is arranged to be fixedly connected to the tooling piece.

7. The clamping device according to any one of claims 1 - 6, wherein The driving mechanism is a cylinder.

8. The clamping device according to claim 7, wherein, The fixing component further includes: A bottom plate, located at the bottom of the fixing piece. The bottom plate has an air inlet groove, and the calibration bench air circuit is fixedly connected to the air inlet groove.

9. The clamping device according to claim 8, characterized in that, Further comprising: A third sealing member, disposed between the fixing piece and the bottom plate.

10. The clamping device according to claim 9, wherein, Further comprising: A connecting block, located between the driving mechanism and the threaded safety valve.

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