A detection device and a test method for regulating valve packing sealing performance

Abstract

The present invention provides a detection device and a test method for the sealing performance of regulating valve packing, which relates to the technical field of packing sealing detection equipment, including: the pressure test cylinder detects the sealing performance of the regulating valve packing when water is injected and pressurized; two ball valves are symmetrically threaded at both ends of the horizontal part of the T-shaped water distribution pipe, one of which is used to inject water into the pressure test cylinder and pressurize it, and the other is used to drain and depressurize the pressure test cylinder when the two ball valves are opened; the head end openings of the two ball valves are threadedly connected with water receiving pipes, and racks are slidably installed above the two water receiving pipes. Two connecting rods, two racks and shaft rings are connected together to form two crank slider mechanisms, through which the upward and downward sliding shaft rings can drive the two racks to slide left and right, mesh and drive the two gears and the two valve shafts to twist synchronously, and control the two ball valves to switch alternately at one time, which is helpful to indirectly improve the detection and use efficiency of the equipment compared with the prior art.

Description

Technical Field

[0001] The invention relates to the technical field of packing seal detection equipment, and in particular to a detection equipment for regulating valve packing seal and a test method thereof. Background Art

[0002] Control valves are key components in industrial process control, used to adjust parameters such as pressure and flow of fluids (such as gas and liquid). The performance of control valves directly affects the stability and efficiency of the entire system, and the packing is an important sealing element of the control valve, and its sealing performance is directly related to the reliability and safety of the control valve.

[0003] The existing testing equipment is provided with a valve for allowing water to enter the water filling and pressure testing container. In order to prevent the pressurized water for the test from spraying and scattering through the water outlet groove or water outlet gap on the test container for water outlet testing the sealing when the filler is removed after the test is completed, a valve for draining and relieving the pressure of the test container is generally also configured. However, the two valves are separated and independently arranged from each other, and there is often a lack of power transmission mechanism between the two valve shafts, resulting in the two valves being unable to be synchronously driven to switch alternately. The two valves need to be switched alternately step by step before and after each test. The operation is relatively cumbersome and inconvenient, which indirectly reduces the detection efficiency of the equipment. Summary of the invention

[0004] In view of this, the present invention provides a detection device and a test method for regulating the sealing of valve packing, so as to solve the problem that the water inlet valve and the drain valve cannot be driven synchronously to switch alternately, and the two valves need to be switched alternately step by step before and after each detection, which makes the operation more cumbersome and inconvenient.

[0005] The technical solution proposed by the present invention is: a detection device for regulating the sealing performance of valve packing, specifically comprising: a pressurized test cylinder and a base, wherein a T-shaped water distribution pipe is welded at the center of the bottom end of the pressurized test cylinder;

[0006] The pressure test cylinder detects the sealing performance of the regulating valve packing when filling with water and pressurizing; two ball valves are symmetrically threaded at both ends of the horizontal part of the T-shaped water distribution pipe, and when the two ball valves are opened, one is used to fill the pressure test cylinder with water and pressurize it, and the other is used to drain and depressurize the pressure test cylinder;

[0007] The head end openings of the two ball valves are both threadedly connected with water receiving pipes, and racks are slidably installed above the two water receiving pipes, and the two racks slide towards each other;

[0008] A vertical support shaft is welded at the center of the top of the base, and the top of the vertical support shaft is welded and fixed to the T-shaped water distribution pipe. A shaft ring is slidably mounted on the vertical support shaft, and two connecting rods are symmetrically rotated between the tail ends of the two racks and the shaft rings; the top ends of the two ball valve shafts are both mounted with gears, and the two racks are correspondingly meshed with the two gears for transmission.

[0009] Furthermore, an L-shaped mounting block is welded to the top of the circumferential wall of the water receiving pipe, and the rack is slidably fitted with the top horizontal part of the L-shaped mounting block;

[0010] The tail end of a water receiving pipe connected to the ball valve for water injection is connected to the water supply end of an external pressurized water supply system through a hose, and the tail end of a water receiving pipe connected to the ball valve for drainage is connected to the return end of the external pressurized water supply system through a hose.

[0011] Furthermore, a horizontally supported driving rod is welded to the outer circumference of the shaft ring, and the tail ends of the two connecting rods are rotatably matched with the driving rod.

[0012] Furthermore, a circular water receiving basin is welded on the bottom end of the pressure test cylinder, and an L-shaped drain pipe is welded between the bottom part of the circumferential side wall of the circular water receiving basin and the water receiving pipe on one side of the water injection ball valve.

[0013] Furthermore, two limit strips are symmetrically arranged on the circumferential side wall of the pressurized test cylinder, and a sliding frame is slidably mounted on the pressurized test cylinder. The sliding frame as a whole is composed of two symmetrically arranged U-shaped vertical support rods and a sealing plug and a sliding ring welded between the two ends of the U-shaped vertical support rods in a corresponding manner up and down;

[0014] The sliding ring is slidably inserted and matched with the pressure test tube and the two limit strips, and a U-shaped force transmission frame is welded on the outer circumference of the sliding ring;

[0015] The sealing plug is a circular central opening structure as a whole, and the cross section of the sealing plug is a convex structure.

[0016] Furthermore, the top thread of the sealing plug is fastened with a support mounting member, and the support mounting member as a whole is composed of two upper and lower mounting rings and a circle of vertical support rods welded around the two mounting rings;

[0017] An inverted motor is threaded onto the top end of the support mount.

[0018] Furthermore, the rotating shaft of the motor is protruding at both ends, and a knob is welded on the top of the rotating shaft, and a hexagonal shaft hole is opened on the part of the rotating shaft below the motor;

[0019] The bottom end portion of the rotating shaft is in a hexagonal structure.

[0020] Furthermore, a threaded sleeve is welded at the center of the top of the pressure test cylinder, a packing installation cylinder is welded at the top of the threaded sleeve, the packing installation cylinder is a top open structure, and the inside of the packing installation cylinder is used to fill the regulating valve packing;

[0021] A test valve shaft is screwed through the threaded sleeve, the lower half of the test valve shaft is provided with external threads, and the upper half is a hexagonal structure;

[0022] Driven by the downward movement of the sliding frame, the hexagonal shaft hole on the rotating shaft is sleeved and matched with the hexagonal shaft section of the test valve shaft, and the bottom protruding part of the sealing plug is inserted into the packing installation cylinder and pressed into contact with the regulating valve packing.

[0023] Furthermore, a positioning ear plate is welded on the circumferential side wall of the top portion of the pressure test cylinder, and a mounting ear block is welded on the circumferential side wall of the circular water receiving basin, and a threaded rocker is rotatably installed between the positioning ear plate and the mounting ear block, and the threaded rocker is arranged in a vertical Z-shaped structure;

[0024] The threaded rocker is screwed through and matched with the middle part of the U-shaped force transmission frame.

[0025] The present invention also proposes a technical solution: a testing method for a detection device for regulating the sealing performance of valve packing, comprising the following operating steps:

[0026] ①. First, insert the regulating valve stuffing plug with unclosed structure such as packing or closed structure such as graphite pad into the annular spacing groove between the inside of the stuffing installation cylinder and the test valve shaft;

[0027] ② Then, push the sliding frame down by pushing the threaded rocker, insert the protruding part of the bottom side of the sealing plug into the inside of the packing installation tube and make pressure contact with the packing of the regulating valve, and perform pressure sealing on the gap between the sealing packing and the inner wall of the packing installation tube and the test valve shaft;

[0028] ③. As the sliding frame slides down, the hexagonal shaft hole on the rotating shaft is driven to fit with the hexagonal shaft section of the test valve shaft, thereby coupling the test valve shaft with the motor power;

[0029] ④. Start the motor to drive the test valve shaft to rotate, and open the water injection ball valve to inject water into the pressurized test cylinder to increase the pressure. When the water injection ball valve is opened, the drainage ball valve is closed;

[0030] ⑤. Observe whether there is water flowing out from the gap between the regulating valve packing and the test valve shaft and the inner wall of the packing installation cylinder. If there is water, it is judged that the sealing of the regulating valve packing is unqualified, otherwise it is qualified;

[0031] ⑥After the sealing test is completed, open the drainage ball valve to drain the water and release the pressure inside the packing installation cylinder. When the drainage ball valve is opened, the water injection ball valve is closed at the same time;

[0032] ⑦. Finally, the threaded rocker is used to push the sliding frame and the sealing plug to slide up and reset, and the stuffing installation cylinder is opened to remove and unload the stuffing of the regulating valve inside to complete the entire test process.

[0033] The present invention provides a detection device for regulating valve packing sealing and a test method thereof, which have the following beneficial effects:

[0034] When the present invention is in use, two connecting rods, two racks and axle rings are connected together to form two crank slider mechanisms. Through these two mechanisms, the up and down sliding axle rings can drive the two racks to slide left and right toward each other, meshing and driving the two gears and the two valve shafts to twist synchronously, and control the two ball valves to switch alternately at one time. Compared with the prior art, the trouble of alternately switching the two ball valves in steps before and after each detection and use can be eliminated. The operation is relatively convenient and quick, which helps to indirectly improve the detection and use efficiency of the equipment.

[0035] In addition, the circular water collecting basin is used to collect test water that may leak from the rotating gap between the test valve shaft and the threaded sleeve when disassembling the regulating valve packing, so as to prevent the leaked test water from directly dripping downward along the circumferential outer wall of the pressurized test cylinder and wetting and polluting the bottom of the equipment and the surrounding ground; the leaked water collected in the circular water collecting basin can be returned to the external pressurized water supply system through the L-shaped drain pipe, the right-side water connecting pipe and the hose connected between the right-side water connecting pipe and the return water end of the external pressurized water supply system in turn for recycling and reuse, which is beneficial to reduce the waste and consumption of water resources by the equipment to a certain extent.

[0036] In addition, the motor is fixedly connected to the sliding frame through the support mounting part. When the sliding frame is driven to slide up and down to tighten the regulating valve packing, it can drive the motor to rise and fall together, control the combination and separation of the rotating shaft and the test valve shaft, and implement dynamic coupling and decoupling of the test valve shaft and the motor, eliminating the trouble of additional manual effort to slide the drive motor up and down before and after each test, which helps to simplify the operation steps of the equipment.

[0037] In addition, the hexagonal part at the bottom end of the rotating shaft can be used as a reference for calibrating and aligning the hexagonal shaft hole with the hexagonal shaft section of the test valve shaft. The hexagonal shaft hole can be quickly torsionally calibrated and aligned with the hexagonal shaft section of the test valve shaft by referring to the hexagonal part at the bottom end of the rotating shaft, thereby avoiding the hexagonal shaft hole being hidden by the rotating shaft and unable to directly check the posture and orientation, and requiring multiple twisting attempts to calibrate and align with the hexagonal shaft section of the test valve shaft. This helps to indirectly improve the operating efficiency of the test valve shaft and motor power coupling, and further simplifies the overall operating steps of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0039] The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.

[0040] In the attached picture:

[0041] Figure 1 The overall structural schematic diagram of the present invention is shown;

[0042] Figure 2 The motor sliding state diagram of the present invention is shown;

[0043] Figure 3 The overall bottom side structure schematic diagram of the present invention is shown;

[0044] Figure 4 The motor sliding state diagram of the present invention is shown;

[0045] Figure 5 A schematic diagram of the inner structure of a half-section of a pressurized test tube of the present invention is shown;

[0046] Figure 6 The slide frame of the present invention is shown in a disassembled state;

[0047] Figure 7 A schematic diagram of the bottom structure of the pressurized test cylinder of the present invention is shown;

[0048] Figure 8 A schematic diagram of the base structure of the present invention is shown;

[0049] Fig. 9 The rack disassembly state diagram of the present invention is shown;

[0050] Reference numerals list

[0051] 1. Pressurized test tube; 101. Limit strip; 102. Positioning ear plate; 103. T-shaped water distribution pipe; 104. Threaded sleeve; 105. Packing installation tube; 106. Test valve shaft;

[0052] 2. Round water receiving basin; 201. L-shaped drain pipe; 202. Mounting ear block; 203. Threaded rocker;

[0053] 3. base; 301. vertical support shaft; 302. shaft ring;

[0054] 5. Regulating valve packing;

[0055] 4. Ball valve; 401. Water connection pipe; 4011. L-shaped mounting block; 402. Rack; 4021. Connecting rod; 403. Gear;

[0056] 6. Sliding frame; 601. Sliding ring; 6011. Cylinder-shaped force transmission frame; 602. Sealing plug;

[0057] 7. Motor; 701. Rotating shaft;

[0058] 8. Support mounting parts. DETAILED DESCRIPTION

[0059] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0060] For convenience of description, the length direction of the water receiving pipe 401 is marked as the left-right direction, and the width direction is marked as the front-back direction;

[0061] Please refer to Figures 1 to 9 , an embodiment provided by the present invention:

[0062] The present invention proposes a detection device for regulating the sealing performance of valve packing, comprising: a pressure test cylinder 1, a limit strip 101, a positioning ear plate 102, a T-shaped water distribution pipe 103, a threaded sleeve 104, a packing installation cylinder 105, a test valve shaft 106, a circular water receiving basin 2, an L-shaped drain pipe 201, an installation ear block 202, a threaded rocker 203, a base 3, a vertical support shaft 301, a shaft ring 302, a ball valve 4, a water receiving pipe 401, an L-shaped installation block 4011, a rack 402, a connecting rod 4021, a gear 403, a sliding frame 6, a sliding ring 601, a U-shaped force transmission frame 6011, a sealing plug 602, a motor 7, a rotating shaft 701, and a support mounting member 8. A T-shaped water distribution pipe 103 is welded at the center of the bottom end of the pressure test cylinder 1;

[0063] Among them, the pressure test cylinder 1 detects the sealing performance of the regulating valve packing 5 when filling water and pressurizing; two ball valves 4 are symmetrically threaded at both ends of the horizontal part of the T-shaped water distribution pipe 103. When the two ball valves 4 are opened, one is used to fill water and pressurize the pressure test cylinder 1, and the other is used to drain and relieve pressure of the pressure test cylinder 1. Before the test, the pressure test cylinder 1 needs to be filled with water and pressurized, and after the test, the pressure test cylinder 1 needs to be drained and relieved; the head end openings of the two ball valves 4 are threadedly connected with water receiving pipes 401, and the upper ends of the two water receiving pipes 401 are connected to the upper ends of the two ball valves 401. Racks 402 are slidably installed on both sides, and the two racks 402 slide toward each other; a vertical support shaft 301 is welded at the center of the top of the base 3, and the top of the vertical support shaft 301 is welded and fixed to the T-shaped water distribution pipe 103, and a shaft ring 302 is slidably mounted on the vertical support shaft 301, and two connecting rods 4021 are symmetrically rotated between the tail ends of the two racks 402 and the shaft ring 302; the top ends of the valve shafts of the two ball valves 4 are both mounted with gears 403, and the two racks 402 are correspondingly meshed with the two gears 403 for transmission;

[0064] The ball valve 4 on the left is used for water injection, and the ball valve 4 on the right is used for drainage. When the pressure test cylinder 1 is injected with water and punched, the ball valve 4 on the left needs to be opened and the ball valve 4 on the right needs to be closed to prevent the injected water from being discharged through the ball valve 4 on the right and causing the pressure test cylinder 1 to fail to increase pressure normally. Similarly, when the pressure test cylinder 1 is depressurized, the ball valve 4 on the left needs to be closed and the ball valve 4 on the right needs to be opened, so that the two ball valves 4 have the operation requirement of switching on and off alternately.

[0065] The two connecting rods 4021, the two racks 402 and the collar 302 are connected together to form two crank slider mechanisms. Through these two mechanisms, the upward and downward sliding collar 302 can drive the two racks 402 to slide left and right toward each other, meshing and driving the two gears 403 and the two valve shafts to rotate synchronously, and control the two ball valves 4 to switch alternately at one time (refer to Figure 8 and Fig. 9 ), compared with the prior art, it can save the trouble of switching the two ball valves 4 alternately in steps before and after each detection, and the operation is more convenient and quick, which helps to indirectly improve the detection efficiency of the equipment;

[0066] It is worth noting that: the working principle of the ball valve 4 determines that it has no restrictions on the installation direction, but when installing two ball valves 4, it should be ensured that the switching states of the two ball valves 4 are mutually exclusive, that is, one is in the open state and the other is in the closed state. When the valve shafts on the two ball valves 4 with mutually exclusive switching states are synchronously twisted and driven by the two racks 402, it can be ensured that the two ball valves 4 are alternately switched.

[0067] Preferably, an L-shaped mounting block 4011 is welded to the top of the circumferential tube wall of the water receiving pipe 401, and the rack 402 is slidably fitted through the top horizontal part of the L-shaped mounting block 4011; the tail end of the water receiving pipe 401 connected to the ball valve 4 for water injection is connected to the water supply end of the external pressurized water supply system through a hose, and the tail end of the water receiving pipe 401 connected to the ball valve 4 for drainage is connected to the return water end of the external pressurized water supply system through a hose.

[0068] Preferably, a horizontally supported driving rod is welded to the outer circumference of the shaft ring 302, and the tail ends of the two connecting rods 4021 are rotatably matched with the driving rod.

[0069] Preferably, a circular water receiving basin 2 is welded to the bottom end of the pressure test cylinder 1, and an L-shaped drain pipe 201 is welded between the bottom side portion of the circumferential side wall of the circular water receiving basin 2 and the water receiving pipe 401 on one side of the water injection ball valve 4;

[0070] The circular water receiving basin 2 is used to receive the test water that may leak out from the rotating gap between the test valve shaft 106 and the threaded sleeve 104 when disassembling the regulating valve packing 5, avoiding the leaked test water from directly dripping downward along the circumferential outer wall of the pressure test cylinder 1 and wetting and contaminating the bottom of the equipment and the surrounding ground; the leaked water received inside the circular water receiving basin 2 can flow back into the external pressurized water supply system for recycling through the L-shaped drain pipe 201, the right connecting water pipe 401, and the hose connecting the right connecting water pipe 401 and the return end of the external pressurized water supply system in sequence, which is beneficial to reducing the waste and consumption of water sources by the equipment to a certain extent;

[0071] It should be noted that: the test water discharged from the pressure test cylinder 1 flows back into the external pressurized water supply system for recycling through the right ball valve 4, the right connecting water pipe 401, and the hose connecting the right connecting water pipe 401 and the return end of the external pressurized water supply system in sequence.

[0072] Preferably, two limiting strips 101 are symmetrically arranged on the circumferential side wall of the pressure test cylinder 1, and a sliding frame 6 is slidably sleeved on the pressure test cylinder 1. The sliding frame 6 is integrally composed of two symmetrically arranged U-shaped vertical support rods and a sealing plug 602 and a sliding ring 601 welded between the heads and tails of the two U-shaped vertical support rods; the sliding ring 601 is slidably inserted and fitted with the pressure test cylinder 1 and the two limiting strips 101, and a U-shaped force transmission frame 6011 is welded on the outer circumference of the sliding ring 601; the sealing plug 602 is of a circular center-opening structure, and the cross-section of the sealing plug 602 is a convex structure.

[0073] Preferably, a support mounting member 8 is screwed and fixed at the top end of the sealing plug 602. The support mounting member 8 is integrally composed of two upper and lower mounting rings and a circle of vertical support rods welded between the two mounting rings; an inverted motor 7 is screwed and fixed at the top end of the support mounting member 8.

[0074] Preferably, the rotating shaft 701 of the motor 7 protrudes at both ends, and a knob is welded at the top end of the rotating shaft 701. A hexagonal shaft hole is provided on the part of the rotating shaft 701 below the motor 7; the bottom end part of the rotating shaft 701 is of a hexagonal structure.

[0075] Preferably, a threaded sleeve 104 is welded at the center position of the top end of the pressure test cylinder 1, and a packing installation cylinder 105 is welded at the top end of the threaded sleeve 104. The packing installation cylinder 105 is of a top-opening structure, and the regulating valve packing 5 is filled inside the packing installation cylinder 105; a test valve shaft 106 is screwed through the threaded sleeve 104. The lower half of the test valve shaft 106 is provided with an external thread, and the upper half is of a hexagonal structure; under the downward driving of the sliding frame 6, the hexagonal shaft hole on the rotating shaft 701 is inserted and fitted with the hexagonal shaft section of the test valve shaft 106, and the protruding part at the bottom side of the sealing plug 602 is inserted and pressed against the inside of the packing installation cylinder 105 and is in top pressure contact with the regulating valve packing 5;

[0076] When the hexagonal shaft hole on the rotating shaft 701 is inserted and matched with the hexagonal shaft section of the test valve shaft 106, the test valve shaft 106 is connected and coupled with the motor 7, and when the bottom side protruding part of the sealing plug 602 is inserted into the inside of the packing installation cylinder 105 and presses and contacts the regulating valve packing 5, the plug cover of the packing installation cylinder 105 can be closed, and the regulating valve packing 5 is elastically deformed by pressing, the volume of the regulating valve packing 5 is increased, and the gap between the regulating valve packing 5 and the inner wall of the packing installation cylinder 105 and the test valve shaft 106 is compressed and sealed (refer to Figure 5 and Figure 6 );

[0077] The motor 7 is fixedly connected to the sliding frame 6 through the supporting mounting member 8. When the sliding frame 6 is driven to slide up and down to loosen or tighten the regulating valve packing 5, the motor 7 can be driven to lift and slide together, and the rotating shaft 701 and the test valve shaft 106 are controlled to be inserted, combined and separated, and the test valve shaft 106 and the motor 7 are dynamically coupled and decoupled, eliminating the trouble of additional manual effort to slide the drive motor 7 up and down before and after each test, which helps to simplify the operation steps of the device;

[0078] The hexagonal part at the bottom of the rotating shaft 701 can be used as a reference for calibrating and aligning the hexagonal shaft hole with the hexagonal shaft section of the test valve shaft 106. The hexagonal shaft hole can be quickly calibrated and aligned with the hexagonal shaft section of the test valve shaft 106 by referring to the hexagonal part at the bottom of the rotating shaft 701, so as to avoid the hexagonal shaft hole being hidden by the rotating shaft 701 and unable to directly check the posture and orientation, and requiring multiple twisting attempts to calibrate and align with the hexagonal shaft section of the test valve shaft 106, which helps to indirectly improve the operating efficiency of the power coupling between the test valve shaft 106 and the motor 7, and further simplify the overall operation and use steps of the equipment;

[0079] When the rotating shaft 701 and the test valve shaft 106 are inserted and matched with each other for power connection, the motor 7 can rotate to drive the test valve shaft 106 and the compressed regulating valve packing 5 to rotate relative to each other, simulating the relative motion relationship between the valve shaft and the packing under the actual use state, so that the test effect of the equipment is more real and effective;

[0080] The regulating valve packing 5 of the closed structure such as the graphite pad needs to be sleeved with the test valve shaft 106 and slide up and down along the test valve shaft 106 to be disassembled and assembled inside the packing installation cylinder 105. When the motor 7 and the rotating shaft 701 slide upward to the top, the rotating shaft 701 is separated from the test valve shaft 106 and a spacing space is formed between them (refer to Figure 1 and Figure 2 ), this interval space can be used for the regulating valve packing 5 with a closed structure such as a graphite pad to be inserted and removed on the test valve shaft 106, ensuring that the regulating valve packing 5 with a closed structure can be normally disassembled and assembled in the packing installation cylinder 105.

[0081] Preferably, a positioning ear plate 102 is welded on the circumferential side wall of the top portion of the pressure test cylinder 1, and a mounting ear block 202 is welded on the circumferential side wall of the circular water receiving basin 2, and a threaded rocker 203 is rotatably installed between the positioning ear plate 102 and the mounting ear block 202, and the threaded rocker 203 is arranged in a vertical Z-shaped structure; the threaded rocker 203 is screwed through and matched with the middle portion of the U-shaped force transmission frame 6011;

[0082] The threaded rocker 203 can rotate forward and backward to drive the U-shaped force transmission frame 6011 and the entire sliding frame 6 to slide up and down.

[0083] Based on the first embodiment, the second embodiment:

[0084] The present invention also proposes a testing method for a detection device for regulating the sealing performance of valve packing, comprising the following operating steps:

[0085] ① First, insert the regulating valve packing 5 of an unclosed structure such as packing or a closed structure such as a graphite pad into the annular spacing groove between the inside of the packing installation cylinder 105 and the test valve shaft 106;

[0086] ② Then, the threaded rocker 203 is pushed to drive the sliding frame 6 downward, and the bottom protruding part of the sealing plug 602 is inserted into the packing installation tube 105 and pressed into contact with the regulating valve packing 5, so as to implement pressure sealing on the gap between the sealing packing and the inner wall of the packing installation tube 105 and the test valve shaft 106;

[0087] ③, while the sliding frame 6 slides down, the hexagonal shaft hole on the rotating shaft 701 is driven to be inserted and matched with the hexagonal shaft section of the test valve shaft 106, so as to couple the test valve shaft 106 with the motor 7;

[0088] ④, start the motor 7 to drive the test valve shaft 106 to rotate, and open the water injection ball valve 4 to inject water into the pressurized test tube 1 to increase the pressure. When the water injection ball valve 4 is opened, the drainage ball valve 4 is closed;

[0089] ⑤. Observe whether there is water flowing out from the gap between the regulating valve packing 5 and the test valve shaft 106 and the inner wall of the packing installation cylinder 105. If there is water, it is judged that the sealing of the regulating valve packing 5 is unqualified, otherwise it is qualified;

[0090] ⑥ After the sealing test is completed, the drainage ball valve 4 is opened to drain the water and release the pressure inside the packing installation cylinder 105. When the drainage ball valve 4 is opened, the water injection ball valve 4 is closed;

[0091] ⑦. Finally, the threaded rocker 203 is used to push the sliding frame 6 and the sealing plug 602 upward to slide back to the original position, and the packing installation cylinder 105 is opened to remove and unload the regulating valve packing 5 inside it, so as to complete the entire test process.

[0092] Working principle: First, insert the regulating valve packing 5 of an unclosed structure such as packing or a closed structure such as a graphite pad into the annular spacing groove between the inside of the packing installation tube 105 and the test valve shaft 106, and then push the sliding frame 6 down through the threaded rocker 203, and insert the bottom side protruding part of the sealing plug 602 into the inside of the packing installation tube 105 and press it into contact with the regulating valve packing 5, and perform top pressure sealing on the gap between the sealing packing and the inner wall of the packing installation tube 105 and the test valve shaft 106. While the sliding frame 6 slides down, the hexagonal shaft hole on the rotating shaft 701 is driven to fit with the hexagonal shaft section of the test valve shaft 106, so as to couple the test valve shaft 106 with the power of the motor 7, and start the motor 7 to drive the test valve shaft 106 to rotate, and open it. The ball valve 4 for water injection is used to pressurize the inside of the pressurized test tube 1. When the ball valve 4 for water injection is opened, the ball valve 4 for drainage is closed at the same time. Observe whether there is water flowing out from the gap between the regulating valve packing 5 and the test valve shaft 106 and the inner wall of the packing installation tube 105. If so, it is judged that the sealing of the regulating valve packing 5 is unqualified, otherwise it is qualified. After the sealing test is completed, the ball valve 4 for drainage is opened to drain the water and release the pressure inside the packing installation tube 105. When the ball valve 4 for drainage is opened, the ball valve 4 for water injection is closed at the same time. Finally, the threaded rocker 203 is used to push and drive the sliding frame 6 and the sealing plug 602 to slide up and reset, and the packing installation tube 105 is opened to dismantle and unload the regulating valve packing 5 inside it to complete the entire test process.

[0093] In this article, there are a few points to note:

[0094] 1. The drawings of the embodiments of the present invention only relate to the structures related to the embodiments of the present invention, and other structures may refer to the usual designs.

[0095] 2. In the absence of conflict, the embodiments of the present invention and the features therein may be combined with each other to obtain new embodiments.

[0096] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A detection device for regulating the sealing performance of valve packing, comprising: Pressurized test cylinder (1), base (3) and regulating valve packing (5). At the center of the bottom end of the pressurized test cylinder (1), a T-shaped water distributor (103) is welded. It is characterized in that the pressurized test cylinder (1) detects the sealing performance of the regulating valve packing (5) during water injection and pressurization; at both ends of the horizontal part of the T-shaped water distributor (103), two ball valves (4) are symmetrically connected by threads. When the two ball valves (4) are opened, one is used for injecting water and pressurizing the pressurized test cylinder (1), and the other is used for draining water and relieving pressure from the pressurized test cylinder (1). At the first-end openings of the two ball valves (4), water connection pipes (401) are connected by threads. Above the two water connection pipes (401), racks (402) are slidably installed. The two racks (402) slide towards each other. At the center of the top end of the base (3), an upright support shaft (301) is welded. The top end of the upright support shaft (301) is welded and fixed to the T-shaped water distributor (103). An axle collar (302) is slidably sleeved on the upright support shaft (301). Between the tails of the two racks (402) and the axle collar (302), two connecting rods (4021) are symmetrically and rotatably connected; at the top ends of the valve shafts of the two ball valves (4), gears (403) are sleeved. The two racks (402) are correspondingly meshed and driven with the two gears (403). On the circumferential side wall of the pressurized test cylinder (1), two limiting strips (101) are symmetrically arranged. A sliding frame (6) is slidably sleeved on the pressurized test cylinder (1). The sliding frame (6) is integrally composed of two symmetrically arranged U-shaped vertical support rods, a sealing plug (602) and a sliding ring (601) which are welded between the head and tail ends of the two U-shaped vertical support rods in an up-and-down correspondence. The sliding ring (601) is slidably inserted and fitted with the pressurized test cylinder (1) and the two limiting strips (101). On the circumferential outer ring of the sliding ring (601), a U-shaped force transmission frame (6011) is welded; the sealing plug (602) is of an overall circular structure with a central opening, and the cross-section of the sealing plug (602) is of a convex structure. At the top end of the sealing plug (602), a support mounting part (8) is screwed and fastened. The support mounting part (8) is integrally composed of two upper and lower mounting rings and a circle of upright support rods welded between the two mounting rings; at the top end of the support mounting part (8), an inverted motor (7) is screwed and fastened. The rotating shaft (701) of the motor (7) is provided with protruding ends, a knob is welded to the top of the rotating shaft (701), and a hexagonal shaft hole is provided in the portion of the rotating shaft (701) below the motor (7); the bottom end of the rotating shaft (701) is a hexagonal structure; a threaded sleeve (104) is welded to the center of the top end of the pressure test cylinder (1), a packing installation cylinder (105) is welded to the top end of the threaded sleeve (104), the packing installation cylinder (105) is a top open structure, and the packing installation cylinder (105) is The interior of the (105) is used to fill the regulating valve packing (5); a test valve shaft (106) is screwed through the threaded sleeve (104), the lower half of the test valve shaft (106) is provided with an external thread, and the upper half is a hexagonal structure; under the downward drive of the sliding frame (6), the hexagonal shaft hole on the rotating shaft (701) is sleeved and matched with the hexagonal shaft section of the test valve shaft (106), and the bottom side protruding part of the sealing plug (602) is inserted into the packing installation cylinder (105) and is in pressure contact with the regulating valve packing (5); A positioning ear plate (102) is welded on the circumferential side wall of the top portion of the pressure test cylinder (1), and a mounting ear block (202) is welded on the circumferential side wall of the circular water receiving basin (2). A threaded rocker (203) is rotatably installed between the positioning ear plate (102) and the mounting ear block (202), and the threaded rocker (203) is arranged in a vertical Z-shaped structure; the threaded rocker (203) is screwed into the middle portion of the U-shaped force transmission frame (6011).

2. A detection device for regulating valve packing sealing according to claim 1, characterized in that: An L-shaped mounting block (4011) is welded to the top of the circumferential wall of the water receiving pipe (401), and the rack (402) and the top horizontal portion of the L-shaped mounting block (4011) penetrate and slide in cooperation; The tail end of a water receiving pipe (401) connected to the ball valve (4) for water injection is connected to the water supply end of an external pressurized water supply system through a hose, and the tail end of a water receiving pipe (401) connected to the ball valve (4) for drainage is connected to the water return end of the external pressurized water supply system through a hose.

3. The detection device for regulating valve packing sealing according to claim 1, characterized in that: A horizontally supported driving rod is welded to the outer circumference of the shaft ring (302), and the tail ends of the two connecting rods (4021) are both rotatably matched with the driving rod.

4. The detection device for regulating valve packing sealing according to claim 1, characterized in that: A circular water receiving basin (2) is welded to the bottom end of the pressure test cylinder (1), and an L-shaped drain pipe (201) is welded between the bottom side portion of the circumferential side wall of the circular water receiving basin (2) and the water receiving pipe (401) on one side of the water injection ball valve (4).

5. A testing method for a detection device for regulating valve packing sealing according to any one of claims 1 to 4, characterized in that: The steps include: ① First, insert the regulating valve packing (5) of an unclosed structure such as packing or a closed structure such as a graphite pad into the annular spacing groove between the inside of the packing installation cylinder (105) and the test valve shaft (106); ② Then, the threaded rocker (203) is pushed to drive the sliding frame (6) downward, and the protruding portion of the bottom side of the sealing plug (602) is inserted into the interior of the packing installation tube (105) and is pressed into contact with the regulating valve packing (5), thereby performing a pressure seal on the gap between the sealing packing and the inner wall of the packing installation tube (105) and the test valve shaft (106); ③, the sliding frame (6) slides down, driving the hexagonal shaft hole on the rotating shaft (701) to be inserted and matched with the hexagonal shaft section of the test valve shaft (106), thereby coupling the test valve shaft (106) with the motor (7); ④, starting the motor (7) to drive the test valve shaft (106) to rotate, and opening the water injection ball valve (4) to inject water into the pressurized test cylinder (1) to increase the pressure, and when the water injection ball valve (4) is opened, the drainage ball valve (4) is closed; 5. Observe whether water flows out from the gap between the regulating valve packing (5) and the test valve shaft (106) and the inner wall of the packing installation cylinder (105). If so, it is determined that the sealing performance of the regulating valve packing (5) is unqualified, otherwise it is qualified; ⑥ After the sealing test is completed, the drainage ball valve (4) is opened to release the internal pressure of the packing installation cylinder (105). When the drainage ball valve (4) is opened, the water injection ball valve (4) is closed; ⑦. Finally, the threaded rocker (203) is pushed to drive the sliding frame (6) and the sealing plug (602) to slide upward and reset, and the packing installation cylinder (105) is opened to remove and unload the regulating valve packing (5) inside it, thereby completing the entire test process.

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