Valve leakproofness detection device

Abstract

The invention relates to the technical field of valve leakproofness detection, in particular to a valve leakproofness detection device. In order to optimize leakage protection and detection implementation, the following scheme is adopted: the device comprises a cladding which is used for sleeving a valve, the cladding is provided and communicated with an adjusting sleeve, the adjusting sleeve can rotate relative to the cladding, and the cladding and the adjusting sleeve form a cavity; the joint of the valve and the pipeline, the movable sealing position of the valve opening and closing piece and the valve body shell and the detachable connecting position of the valve are all located in the cavity. And the valve adjusting sleeve is provided with a hole for the probe of the leakage detector to enter. Due to the fact that leakage is not a common situation, drainage is conducted through the holes, leaked gas can flow out of the designated holes to be detected by the leakage detector, and all connection points can be detected at one position. If leakage occurs, the leakage can be checked one by one in a certain environment covering the leakage points until the leakage points are checked out. And a leakage point can be temporarily blocked, or the pressure of the cavity environment can be relieved.

Description

Technical Field

[0001] The present invention relates to the technical field of valve tightness detection, and more particularly to a valve tightness detection device. Background Art

[0002] Valve leakage often occurs at the connection between the valve and the pipeline, the movable seal between the valve opening and closing parts and the valve body shell, and the detachable connection parts of the valve that are not integrated structures, such as flange connections. Existing detection methods mainly rely on leak detectors to collect sound signals. For example, operators use ultrasonic detectors containing probes and headphones to monitor the sound and observe instrument data to determine leaks. To prevent leaks, existing technologies often use covering structures such as sealing covers to wrap the valve. Although this can limit the spread of leaking media through physical barriers and reduce costs, it prevents the detection probe from contacting the leak point, hindering the collection of acoustic signals. Conversely, if an open structure is used, although it is convenient for instrument detection, it allows the leaking media to spread directly into the environment, posing a safety risk. Therefore, there is a certain contradiction between leakage protection and detection implementation in the existing solutions, which needs to be optimized. Summary of the Invention

[0003] The present invention provides a valve tightness detection device, the purpose of which is to optimize leakage protection and detection implementation.

[0004] The above objectives are achieved through the following technical solutions:

[0005] A valve tightness detection device includes a cladding for being sleeved on the valve, an adjusting sleeve being mounted on and connected to the cladding, the adjusting sleeve being rotatable relative to the cladding, and the cladding and the adjusting sleeve forming a cavity;

[0006] The connection between the valve and the pipeline, the movable seal between the valve opening and closing parts and the valve body shell, and the detachable connection part of the valve are all located in the cavity;

[0007] The valve adjusting sleeve has a hole for the leak detector probe to enter.

[0008] The valve switch handle is exposed from the enclosure.

[0009] Each valve and pipeline connection corresponds to an adjustment sleeve; the valve opening and closing parts and the movable sealing part of the valve body shell, as well as the valve detachable connection part share an adjustment sleeve; so that each valve and pipeline connection is aligned with a hole, the valve opening and closing parts and the movable sealing part of the valve body shell, as well as the valve detachable connection part are aligned with the same hole.

[0010] The shell and the adjustment sleeve are both spliced ​​and detachable structures.

[0011] The cladding is provided with holes.

[0012] The enclosure comprises two detachably connected half shells, wherein a passage identical to the valve and a passage for the valve switch to pass through are formed between the two half shells, thereby exposing the valve switch from the enclosure.

[0013] The adjusting sleeve comprises a fixing seat fixedly connected to the enclosure, and a rotating seat rotatably connected to the fixing seat, wherein a hole is provided on the rotating seat.

[0014] The rotating seat also includes a closing plug capable of sealing the holes on the rotating seat.

[0015] The closing plug can be inserted into the rotating seat to seal the leakage point.

[0016] A valve tightness detection method is implemented using the above-mentioned valve tightness detection device, comprising the following steps:

[0017] Step 1: Initially, all holes are sealed. First, the holes on the cladding are opened and a sound leak detector is used to detect whether there is leakage in the holes on the cladding. After the detection is completed, the holes on the cladding are sealed again. If there is leakage, proceed to step 2.

[0018] Step 2: Open one of the holes on the adjustment sleeve, detect the size of the leakage sound of the hole, and re-seal the hole after the detection is completed; repeat step 2 until all holes are detected; or, open one of the holes on the adjustment sleeve, detect the size of the leakage sound of the hole, and rotate the adjustment sleeve; repeat step 2 until the leakage sound increases when the adjustment sleeve is rotated, and the leakage point is detected.

[0019] The beneficial effects of the valve tightness detection device of the present invention are:

[0020] Since leakage is not a common occurrence, this application uses a single-position covering scheme to detect all positions to improve detection efficiency. If there is no leakage at a single position, there is no need to detect other positions. Although the airtightness of the shell and the adjustment sleeve is not completely sealed, by setting holes for drainage, the leaked gas can flow out from the designated holes for detection by the leak detector, so that all connection points can be detected at one position. In the event of a leak, it can be checked one by one under a certain environment of covering the leak point until the leak point is found. The leak point can be temporarily blocked, or the cavity environment can be depressurized. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Shows the front view of the valve tightness detection device after all optional solutions are installed;

[0022] Figure 2 Shows the top view of the valve tightness detection device after all optional solutions are installed;

[0023] Figure 3Shows the left side view of the valve tightness detection device after all optional solutions are installed;

[0024] Figure 4 A schematic diagram showing the installation of a custom plug on the cladding is shown;

[0025] Figure 5 A schematic diagram of the half shell is shown;

[0026] Figure 6 A schematic diagram of a half set is shown;

[0027] Figure 7 Shows Figure 6 Schematic diagram of the enlarged slot at a;

[0028] Figure 8 A schematic diagram of the bucket is shown;

[0029] Figure 9 A schematic diagram of the rotating mount is shown;

[0030] Figure 10 A schematic diagram of the closure plug is shown;

[0031] Figure 11 A cross-section of the closure plug is shown;

[0032] Figure 12 A schematic diagram of the total joint is shown;

[0033] Figure 13 A schematic diagram of the custom plug is shown;

[0034] Figure 14 A schematic diagram showing the custom plug inside the cladding;

[0035] Figure 15 Shows Figure 14 Schematic diagram of the enlarged stomata at point b.

[0036] In the figure: 1-1, half shell; 1-2, flange; 1-3, main joint; 2-1, half ring; 2-2, half groove; 2-3, half sleeve; 2-4, half track; 2-5, extension joint; 2-6, bucket; 2-7, groove; 2-8, plug; 3-1, first head; 3-2, threaded rod; 3-3, reset rod; 3-4, blocking part; 3-5, second head; 3-6, spring; 4-1, outer cylinder; 4-2, first clamping part; 4-3, second clamping part; 4-4, air hole; 4-5, optional plug; 5, sound insulation pad. DETAILED DESCRIPTION

[0037] A valve tightness testing device includes a cladding for fitting over a valve. To accommodate valves already installed in pipelines, and given the multi-path nature of the valve, the cladding is customized based on the number and orientation of the valve's pathways. This allows the cladding to cover all pathways.

[0038] For example, the valve flow channel is on one axis, and the valve switch is perpendicular to the flow channel, that is, the valve is a two-way valve. Then, the customized enclosure includes Figures 1 to 5 The illustrated half-shell 1-1, which is half of the cladding, features half a horizontal passageway and half a longitudinal pipeline, which connects to and is perpendicular to the horizontal passageway. Two half-shells 1-1 are assembled symmetrically, forming a horizontal passageway and a longitudinal pipeline connected to the horizontal passageway. The horizontal flow channel of the valve is located within the horizontal passageway of the cladding, while the valve switch is located within the longitudinal pipeline. The valve handle protrudes upward from the half-shell 1-1, allowing the handle to be operated to open and close the valve even when it is enclosed by the cladding.

[0039] Regarding the assembly method of the cladding, it is recommended to adopt a detachable connection method. For example, flanges 1-2 are fixed to the left and right ends of the upper side of the half shell 1-1, as well as the lower end. The flanges 1-2 of the two half shells 1-1 are connected by a bolt and nut assembly, and at the same time, rubber sealing pads are added to the contact position of the two half shells 1-1 to improve air tightness and sound insulation. Of course, the inner end surface of the half shell 1-1 can also be fixed with a sound insulation pad 5 by gluing. So far, the cladding has three openings on the left, right and top. It is not difficult to understand that the position of the opening is actually aligned one by one with the position of the valve opening and the switch, which is also an explanation of how the cladding is customized according to the number of valve passages and the direction of the passages.

[0040] Furthermore, the valve tightness detection device also includes an adjustment sleeve; wherein, the adjustment sleeve includes a fixed seat and a rotating seat, and the fixed seat includes two aligned and spliced ​​half rings 2-1, thereby forming a complete circular ring structure, and the half grooves 2-2 formed on the half rings 2-1 also form a complete circular ring groove after splicing. When the product is manufactured, the half ring 2-1 needs to be welded to the half shell 1-1 in advance, so that a half ring 2-1 is fixed to the left, right and upper ends of the half shell 1-1. After the valve is covered by the shell, three fixed seats are spliced ​​together. A fixed seat is used in conjunction with a rotating seat. During construction, a rotating seat needs to be rotated and connected to each fixed seat.

[0041] Specifically, the rotating seat includes: two half sleeves 2-3 that are spliced ​​together to form a complete tubular structure. The two half sleeves 2-3 are fixed together by a bolt and nut assembly, which essentially forms a clamp. A half rail 2-4 is fixed to the inner wall of each half sleeve 2-3. After the two half sleeves 2-3 are spliced ​​together, the two half rails 2-4 form a complete circular convex rail. During construction, first insert one half rail 2-4 into the circular groove of the fixed seat, and then insert the other half rail 2-4 into the same circular groove. Finally, the two half sleeves 2-3 are fixed together by a bolt and nut assembly to form a rotating seat. At this time, the two spliced ​​half sleeves 2-3 or the rotating seat can rotate on the two spliced ​​half rings 2-1 or the fixed seat. At this time, it is not difficult to understand that the rotating seat and the fixed seat are coaxially arranged. Figures 1 to 4 In the figure, a rotating base is installed on the fixed base on the left, right and top in the same way. Figure 6 It can be seen that a raised structure having the same function as the flange 1-2 is fixed to the bottom of the half sleeve 2-3. When the raised structures on the two half sleeves 2-3 are docked, they can be used in conjunction with the bolt and nut assembly for connection. An extension joint 2-5 is fixed and connected to one of the half sleeves 2-3. The position of the extension joint 2-5 faces the position where leakage needs to be detected, such as but not limited to the connection between the valve and the pipeline. The purpose of the extension joint 2-5 being connected to the half sleeve 2-3 is to allow the probe / line of the ultrasonic leak detector to enter so that the probe is close to the connection between the valve and the pipeline. Figure 2 A plug 2-8 is fixed to the inner wall of half housing 2-3. This plug 2-8 is designed to fit over and wrap around the pipe connected to the valve. If the plug 2-8 is located within the upper rotating seat, it wraps around the valve and is higher than the connection between the valve housing and the valve core. The rubber plug 2-8 is slightly deformed by the pressure of the pipe, providing a certain sealing and soundproofing effect. While the friction between the plug 2-8 and the pipe is insufficient to lock them together, relative motion can still occur, causing the rotating seat to rotate, thereby rotating the extension joint 2-5 around the axis of the valve-pipe connection, changing the probe's detection position. Because the housing and adjustment set enclose the valve and pipe, if the valve leaks, the gas will be concentrated toward the extension joint 2-5. If the probe approaches the extension joint 2-5 and detects a leak, it indicates a leak at the valve or / and pipe connection. As the probe moves further toward the valve-pipe connection, the sound from the ultrasonic leak detector's earphones increases as it rotates, indicating a leak at the valve-pipe connection.

[0042] Furthermore, the rotating seat also includes a closure plug, which includes a first head 3-1. A coaxially arranged threaded rod 3-2 is fixedly attached to the lower end of the first head 3-1. The diameter of the threaded rod 3-2 is smaller than that of the first head 3-1. A channel is formed in the first head 3-1 and the threaded rod 3-2 for insertion of the reset rod 3-3, allowing the reset rod 3-3 to slide longitudinally within the channel. A blocking portion 3-4 is fixedly attached to the top of the reset rod 3-3, which abuts the upper end of the first head 3-1. The blocking portion 3-4 is fixedly attached to the lower end of the reset rod 3-3. The reset rod 3-3, the blocking portion 3-4, and the threaded rod 3-2 are coaxially arranged, and the diameter of the blocking portion 3-4 is smaller than that of the threaded rod 3-2. A spring 3-6 is mounted on the reset rod 3-3, with the upper and lower ends of the spring 3-6 abutting the threaded rod 3-2 and the blocking portion 3-4, respectively. The threaded rod 3-2 is screwed into the first head 3-1 through a threaded fit, and the blocking portion 3-4 contacts the connection between the valve and the pipeline. The shape and structure of the blocking portion 3-4 are not limited to Figure 10 The cylindrical body shown in the figure can also be a structure with a circular arc surface or a stepped circular arc surface at the bottom, so as to simultaneously contact the valve and the pipeline. Figure 7 As shown, a groove 2-7 is provided on the extension joint 2-5 to accommodate the wiring of the ultrasonic leak detector probe. As the rotating base rotates, the position of the blocking portion 3-4 also changes. When the sound from the ultrasonic leak detector earphones becomes quieter, it indicates that the blocking portion 3-4 has reached the leak. Even when the ultrasonic leak detector probe is placed in groove 2-7, without being placed in the rotating base, it can still detect leaks at the connection between the valve and the pipeline. When the rotating first head 3-1 abuts the top of the extension joint 2-5, the extension joint 2-5 and groove 2-7 are sealed.

[0043] Optimized, combined Figure 8 The lower part of the extension joint 2-5 is fixed with a bucket 2-6 to increase the range of the sound collected at the connection between the valve and the pipeline. Figure 9 The bottom of the bucket 2-6 is made into an arc surface for surface contact between the valve and the pipe connection, and the leakage point is wrapped in the bucket 2-6 so that the airflow can be concentrated and discharged from the top of the bucket 2-6 for detection.

[0044] The bucket 2-6 and the closing plug are optional. Customers can choose whether to install them according to their needs. If these two structures are not added, the extension joint 2-5 can be sealed with a plug. The plug can be sealed with a plug-in connection, a threaded connection, or a snap connection.

[0045] Furthermore, another optional solution is to combine Figures 12 to 15, fixed on the half shell 1-1 located at the rear side and connected to the main joint 1-3, the main joint 1-3 is used in conjunction with a customized plug, which is equivalent to an improvement of the closure plug. The customized plug includes an outer tube 4-1, the front end of the outer tube 4-1 is fixedly connected to a first clamping portion 4-2, the rear end of the outer tube 4-1 is fixedly connected to a second clamping portion 4-3, and a plurality of air holes 4-4 are evenly distributed on the circumference of the outer tube 4-1 near the first clamping portion 4-2. The second clamping portion 4-3 can be used as a flange structure or as a handle structure. The inner wall of the main joint 1-3 has a thread, and the outer wall of the outer tube 4-1 also has a thread. The outer tube 4-1 is screwed into the main joint 1-3 through threaded engagement. When the outer tube 4-1 is against the main joint 1-3, the air holes 4-4 are exposed, and the air holes 4-4 are connected to the inside of the cladding. When the first clamping portion 4-2 rests against the inner wall of the rear half-shell 1-1, the air hole 4-4 is shielded by the inner wall of the main joint 1-3. The second clamping portion 4-3 can be detachably connected to the outer tube 4-1 using a flange, or it can be welded to the outer tube 4-1 after the outer tube 4-1 is screwed into the main joint 1-3. If the inner wall of the half-shell 1-1 is equipped with a sound insulation pad 5, the first clamping portion 4-2 resting against the pad 5 can enhance the sealing effect. Furthermore, when the outer tube 4-1 rests against the main joint 1-3, the air hole 4-4 is not shielded by the pad 5.

[0046] At this point, if all optional solutions are installed, the detection efficiency can be improved. During the detection, the following detection methods can be used to improve the detection efficiency:

[0047] Step 1: Cover the shell and the adjusting sleeve on the valve so that the connection between the valve and the pipeline, as well as the connection of the valve structure itself, are not enclosed in an integrated structure inside a valve tightness detection device of the present application, and the valve handle is exposed to achieve full closure.

[0048] Step 2: When testing is required, first rotate second clamp 4-3 to move air hole 4-4 forward and expose it. Place the ultrasonic leak detector probe on second clamp 4-3 for testing. Then remove the probe and rotate second clamp 4-3 to move air hole 4-4 back into main joint 1-3, fully sealing the leak again. If a leak is detected, proceed to step 3. If no leak is detected, terminate the process.

[0049] Step 3: Rotate all the first heads 3-1 to expose all the slots 2-7, place the probe of the ultrasonic leak detector at each slot 2-7 for detection, keep the first head 3-1 at the slot 2-7 with the loudest sound unchanged, keep the slot 2-7 open, and rotate the other first heads 3-1 to close the other slots 2-7.

[0050] Step 4: Insert the probe into the open slot 2-7, or rotate the first head 3-1 there to remove the plug. Insert the probe into the extension joint 2-5 until it reaches the end of the hopper 2-6, where it contacts the valve and pipe connection. Rotate the rotating seat there to reposition the hopper 2-6 until the sound of leakage increases, indicating the leak location. Then remove the probe, screw the threaded rod 3-2 back into the extension joint 2-5, and place the plug 3-4 against the leak, achieving a second seal. This step can also be used to detect leaks in other adjustment sleeves.

[0051] Step 5: Close the main valve and wait for maintenance of the second sealing part, or expose the air hole 4-4 so that the second clamping part 4-3 is connected to other pipelines to achieve pressure relief.

[0052] To optimize inspection efficiency, outer tube 4-1 can be plugged into main connector 1-3 and temporarily secured using friction preload. For example, a rubber sleeve fixed to the outer wall of outer tube 4-1 can be slightly deformed by squeezing into main connector 1-3. An elastic rubber plug 4-5 is inserted into outer tube 4-1. When plug 4-5 is pushed forward, it also pushes outer tube 4-1 into main connector 1-3. When plug 4-5 is pulled backward, it pulls outer tube 4-1 backward until the first latching portion 4-2 engages. Replacing rotation with a push-pull mechanism improves operational efficiency, but this requires the following: the friction between plug 4-5 and outer tube 4-1, denoted by A, and the friction between outer tube 4-1 and main connector 1-3, denoted by B, with A > B. Preferably, the hardness of the optional plug 4-5 is less than that of the outer cylinder 4-1, so that the optional plug 4-5 is a wearing part relative to the outer cylinder 4-1, and the optional plug 4-5 can be replaced.

Claims

1. A valve tightness detection device, characterized in that: The valve comprises a cladding for being sleeved on the valve, an adjusting sleeve being mounted on the cladding and in communication with the cladding, the adjusting sleeve being capable of rotating relative to the cladding, and the cladding and the adjusting sleeve forming a cavity; The connection between the valve and the pipeline, the movable seal between the valve opening and closing parts and the valve body shell, and the detachable connection part of the valve are all located in the cavity; The valve adjusting sleeve has a hole for the leakage detector probe to enter.

2. The valve tightness detection device according to claim 1, wherein the valve switch handle is exposed from the enclosure.

3. According to the valve tightness detection device of claim 1, each valve and pipeline connection corresponds to an adjustment sleeve; the valve opening and closing member and the movable sealing part of the valve body shell, as well as the valve detachable connection part share an adjustment sleeve; so that each valve and pipeline connection is aligned with a hole, and the valve opening and closing member and the movable sealing part of the valve body shell, as well as the valve detachable connection part are aligned with the same hole.

4. According to the valve tightness detection device according to claim 1, the shell and the adjustment sleeve are both spliced ​​and detachable structures. The valve tightness detection device according to claim 1 , wherein holes are provided on the cladding.

6. The valve tightness detection device according to claim 1, wherein the enclosure comprises two detachably connected half shells (1-1), and a passage identical to the valve is formed between the two half shells (1-1), as well as a passage for the valve switch to pass through, thereby exposing the valve switch to the enclosure.

7. The valve tightness detection device according to claim 1, wherein the adjustment sleeve includes a fixed seat fixed to the cladding shell, and a rotating seat rotatably connected to the fixed seat, and a hole is provided on the rotating seat.

8. The valve tightness detection device according to claim 1, wherein the rotating seat further comprises a sealing plug capable of sealing the holes therein.

9. The valve tightness detection device according to claim 8, wherein the sealing plug can be inserted into the rotating seat to seal the leakage point.

10. A valve tightness detection method, implemented using the valve tightness detection device according to claim 5, comprising the following steps: Step 1: Initially, all holes are sealed. First, open the holes on the cladding and use a sound leak detector to detect whether there is leakage in the holes on the cladding. After the detection is completed, the holes on the cladding are resealed. If there is leakage, proceed to step 2. Step 2: Open one of the holes on the adjustment sleeve, detect the sound level of the hole leakage, and re-seal the hole after the detection is completed; repeat step 2 until all holes are detected; or open one of the holes on the adjustment sleeve, detect the sound level of the hole leakage, and rotate the adjustment sleeve; Repeat step 2 until the leakage sound increases when the adjusting sleeve is rotated and the leakage point is detected.

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