A tool for testing the cut-off pressure of a gas pressure regulator without stopping the gas supply

Abstract

The utility model provides a kind of tool for gas pressure regulator not to stop gas cut-off pressure test, including outer tube, the cylinder cover of being fixed in the top of outer tube, the inner tube of being slidably arranged in outer tube, spring being arranged between inner tube and outer tube, locking release mechanism being arranged in the both sides of outer tube and multiple fixed screws being radially rotated and being arranged in the lower part of outer tube, the middle part of cylinder cover is movably inserted adjusting bolt, the middle part of adjusting bolt is threadedly connected with the center of end plate, locking release mechanism includes the first lock hole of inner tube lower end, the second lock hole on outer tube, the L-shaped lock piece of being set in the both sides of outer tube by hinged structure pitching rotation and the torsion spring of exerting upward torsion to the inner end of L-shaped lock piece.The utility model's tool for gas pressure regulator not to stop gas cut-off pressure test, design is ingenious, test efficiency is high, not to stop gas test avoids the security risk problem of gas leakage due to user end forgets to close gas valve in turn due to test stop gas.

Description

Technical Field

[0001] This utility model belongs to the field of gas installation and testing, specifically relating to a tool for testing the pressure cut-off of a gas pressure regulator without interrupting gas flow. Background Technology

[0002] Gas safety is a crucial component of safety in production and daily life, requiring regular inspections. One such inspection involves testing the shut-off pressure of the gas regulator in the building's pressure regulating box. The gas regulator is a direct-acting type, a current product. Its main structure includes a regulator housing, an adjusting cylinder at the top of the housing, a main diaphragm in the middle of the housing, a valve stem fixed to the main diaphragm, and a regulating spring fitted onto the valve stem. The top of the regulating spring is inserted into the adjusting cylinder, and the upper end of the spring has a spring cap. The spring cap has a raised hexagonal prism in the middle, with a through hole in the middle facing the valve stem. A lever is hinged to the lower end of the valve stem, and the other end of the lever is hinged to a regulating rod that adjusts the valve opening of the gas regulator. Both the regulating rod and the shut-off valve stem are located at the double valve nozzle. Its working principle is as follows: as the opening of the gas pressure regulator valve increases, the outlet pressure of the gas pressure regulator rises. This increased outlet pressure, in turn, pushes the main diaphragm upwards. A fixed valve stem passes through the main diaphragm, and the valve stem drives a lever upwards. The other end of the lever pushes the regulating rod upwards and downwards, causing the gas pressure regulator valve opening to decrease, thus balancing the outlet pressure of the gas pressure regulator. When the outlet pressure of the gas pressure regulator reaches the cut-off pressure set by the shut-off valve, the shut-off valve of the gas pressure regulator cuts off the gas pipeline to prevent accidents.

[0003] Currently, the testing process for gas pressure regulators involves first screwing an adjustment tool with a hexagonal hole at the bottom and external threads into the top of the gas pressure regulator. The hexagonal hole is inserted into the protruding hexagonal post of the spring cap. The adjustment tool is then screwed further into the top of the gas pressure regulator, compressing the spring and causing the middle of the main diaphragm to move downwards. Since a fixed valve stem is inserted through the main diaphragm and spring, the downward movement of the main diaphragm causes the valve stem to move downwards. A lever is hinged to the bottom of the valve stem, and the other end of the lever pulls the pressure regulating rod upwards, increasing the opening of the gas pressure regulator valve and thus forcibly increasing the outlet pressure of the gas pressure regulator. When the outlet pressure of the gas pressure regulator reaches the cut-off pressure set by the shut-off valve, the shut-off valve cuts off the gas pipeline. The pressure change before and after the cut-off is observed, and it is determined whether the outlet pressure of the gas pressure regulator reaches or exceeds the set cut-off pressure when the gas pipeline is cut off. After the test is completed, the adjustment tool is rotated in the opposite direction, and then the shut-off valve is reset. This process takes several minutes. If some households are using gas, this lengthy reset process can cause the pressure inside the pipeline to drop sharply, making it troublesome and adding extra workload to readjusting the pressure inside the pipeline. Therefore, the current approach is to first cut off the gas supply to the user, then conduct a test, and then restore the gas supply to the user after the test is completed. However, this approach also has problems. For example, some users may turn on the gas and find that there is no gas or flame, and they may easily forget to turn it off. After the gas is restored, gas appliances such as gas stoves that have not been turned off are prone to gas leaks, which can lead to safety hazards.

[0004] How to perform a shut-off pressure test on a gas pressure regulator without interrupting gas supply is a technical problem that urgently needs to be solved. Utility Model Content

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A tool for testing the pressure cut-off of a gas pressure regulator without interrupting gas flow includes an outer cylinder, a cylinder cover fixed to the top of the outer cylinder, an inner cylinder slidably disposed within the outer cylinder along its axis, a spring disposed between the inner and outer cylinders, locking and releasing mechanisms disposed on both sides of the outer cylinder, and a plurality of fixing screws radially screwed onto the lower part of the outer cylinder. An adjusting bolt is movably inserted into the center of the cylinder cover. The inner cylinder includes an inner cylinder body and an end plate disposed at the top of the inner cylinder body. The center of the adjusting bolt is threadedly connected to the center of the end plate. The lower end of the adjusting bolt is located below the end plate, and the upper end of the adjusting bolt is located above the cylinder cover. The diameter of the end plate is larger than the outer diameter of the inner cylinder. The inner wall of the outer cylinder has a step. The spring is located on the inner cylinder between the end plate and the step. The locking and releasing mechanism includes a first locking hole at the lower end of the inner cylinder, a second locking hole on the outer cylinder, an L-shaped locking member that is pivotally mounted on both sides of the outer cylinder via a hinge structure, and a torsion spring that applies an upward torque to the inner end of the L-shaped locking member. The middle part of the L-shaped locking member has a hinge hole, the inner end of the hinge hole is a latch, and the outer end of the hinge hole is a handle. The hinge structure is located at the outer end of the upper wall of the second locking hole. The second locking hole has space in the vertical direction for the latch to move downward to unlock.

[0007] Preferably, the hinge structure includes two parallel vertical plates fixed to the outer end of the upper wall of the second lock hole, a pin rotatably inserted into the two vertical plates and the hinge hole, and a torsion spring sleeved on the pin with its two ends respectively fixed to the handle and the outer wall of the outer cylinder above the second lock hole.

[0008] Preferably, the torsion spring is a double torsion spring.

[0009] Preferably, the axial cross-section of the second lock hole is a right trapezoid, including an upper right-angled side, a lower inclined side that slopes downward and inward, an outer short base side, and an inner long base side. The upper wall of the second lock hole cooperates with the bolt to stop, and the inclined lower wall of the second lock hole provides space for the bolt to move downward to unlock.

[0010] Preferably, the inner wall of the upper part of the outer cylinder has a vertical guide groove, and the end plate is provided with a guide block that guides and cooperates with the guide groove.

[0011] Preferably, the bottom of the adjusting bolt is provided with an enlarged end.

[0012] Preferably, the enlarged end consists of two nuts screwed onto the bottom of the adjusting bolt.

[0013] Preferably, the top of the adjusting bolt has an external hexagonal end that is easy to screw on.

[0014] Preferably, the outer cylinder has an external thread on its top outer circumferential surface, and the cylinder cover has an internal thread. The cylinder cover is detachably screwed onto the top of the outer cylinder.

[0015] Preferably, multiple limiting protrusions are evenly distributed on the outer circumferential surface of the inner cylinder below the first lock hole.

[0016] This utility model relates to a tool for testing the shut-off pressure of a gas pressure regulator without interrupting gas flow. In use, first press the adjusting bolt to press the inner cylinder to the locking and releasing mechanism position and lock it in place. Then, place the outer cylinder onto the adjusting cylinder of the gas pressure regulator and tighten the fixing screw to secure the outer cylinder to the adjusting cylinder. Next, tighten the adjusting bolt so that it passes downward through the spring cover and reaches the upper end of the valve stem. Then, begin the test: continue tightening the adjusting bolt, directly pressing the valve stem downward. The valve stem causes the inner end of the lever to move downward, while the other end of the lever pulls the adjusting rod upward, increasing the valve opening of the gas pressure regulator and forcibly increasing the outlet pressure. When the outlet pressure of the gas pressure regulator reaches the set shut-off pressure of the shut-off valve, the shut-off valve cuts off the gas pipeline. During this process, observe the pressure change before and after the cut-off, and whether the outlet pressure of the gas pressure regulator reaches or exceeds the set shut-off pressure when the gas pipeline is cut off. Then, quickly press the locking release mechanism to unlock the inner cylinder. The inner cylinder instantly jumps upwards to reset under the action of the spring, the adjusting bolt disengages from the valve stem, and the valve stem rises under the action of the pressure regulating spring and the main diaphragm. Pressing the locking release mechanism again quickly resets the shut-off valve, restoring gas supply. The entire testing process takes approximately 20 seconds, and the shut-off valve only takes about 5 seconds from cutting off the gas supply to resetting and restoring it. Even if the user uses gas during this process, the change in the natural gas pressure in the user's pipeline is small and within the normal fluctuation range. During testing, there is no need to stop the gas supply at the user's end; it allows for uninterrupted gas pressure testing of the gas regulator. This utility model's testing tool has a simple structure, ingenious design, and high testing efficiency. Uninterrupted testing avoids the safety hazard of gas leaks caused by users forgetting to turn off the gas valve during testing.

[0017] Furthermore, the hinge structure is fixed to the outer end of the upper wall of the second lock hole, which allows the upper wall of the second lock hole to limit the bolt when it is in a horizontal state. The inclined lower wall of the second lock hole provides space for the bolt to move downward to unlock.

[0018] Furthermore, the inner wall of the upper part of the outer cylinder has a vertical guide groove, and a guide block is provided on the end plate to guide and cooperate with the guide groove. This can prevent the inner cylinder from rotating and limit its movement, and guide it in the axial direction, making the up-and-down movement of the inner cylinder more stable, and ensuring that the first and second locking holes are aligned in the axial direction during the up-and-down movement of the inner cylinder. The bottom of the adjusting bolt is provided with an enlarged end to facilitate pressing the upper end of the valve stem. The enlarged end consists of two nuts screwed onto the bottom of the adjusting bolt, which can be tightened to prevent rotation.

[0019] Furthermore, the top of the adjusting bolt has an external hexagonal end for easy screwing, making it convenient to screw with your fingers.

[0020] Furthermore, the outer cylinder has external threads on its top outer circumference and internal threads on its cap. The cap is detachably screwed onto the top of the outer cylinder to prevent the inner cylinder from coming off the outer cylinder under the action of the spring during the resetting process.

[0021] Furthermore, multiple limiting protrusions are evenly distributed on the outer circumference of the inner cylinder below the first locking hole to radially limit the movement of the inner and outer cylinders, making the inner cylinder move up and down more smoothly in the outer cylinder. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the tool for uninterrupted gas pressure cut-off testing of the present invention;

[0023] Figure 2 This is a side view of the tool used for uninterrupted gas pressure cut-off testing of the present invention;

[0024] Figure 3 for Figure 2 A schematic diagram of the AA cross-sectional structure;

[0025] Figure 4 This is a schematic diagram of the outer cylinder of this utility model;

[0026] Figure 5 This is a schematic diagram of the inner cylinder and spring of this utility model;

[0027] Figure 6 This is a schematic diagram of the pin and torsion spring of this utility model.

[0028] 1. Cylinder cover; 2. Outer cylinder; 3. Fixing screw; 4. Adjusting bolt; 5. L-shaped locking element; 6. Torsion spring; 7. Pin; 8. Vertical plate; 9. External thread; 10. Guide block; 11. Vertical guide groove; 12. Spring; 13. Second locking hole; 14. Nut; 15. Inner cylinder; 16. End plate; 17. First locking hole; 18. Large diameter hole; 19. Step; 20. Small diameter hole; 21. Threaded hole; 22. Limiting protrusion. Detailed Implementation

[0029] To clearly illustrate the beneficial effects of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that, unless otherwise specified, the embodiments and features described in the embodiments of the present invention can be combined with each other. Specific embodiments are only used to explain the present invention and are not intended to limit the present invention.

[0030] Example 1

[0031] A tool for testing the pressure cut-off of a gas regulator without interrupting gas flow, such as Figure 1-6As shown, the device includes an outer cylinder 2, a cylinder cover 1 fixed to the top of the outer cylinder, an inner cylinder slidably disposed in the outer cylinder along the axis of the outer cylinder, a spring 12 disposed between the inner cylinder and the outer cylinder, a locking and releasing mechanism disposed on both sides of the outer cylinder, and multiple fixing screws 3 radially screwed into the lower part of the outer cylinder. An adjusting bolt 4 is movably inserted into the middle of the cylinder cover. Specifically, the cylinder cover, inner cylinder, and outer cylinder are all made of plastic. In other embodiments, they can also be made of metal or other materials. The lower part of the outer cylinder has a threaded hole 21. The fixing screw 3 is screwed into the threaded hole 21 and has an external thread on the top outer circumferential surface of the outer cylinder. The cylinder cover has an internal thread. The cylinder cover can be detachably screwed and fixed to the top of the outer cylinder to prevent the inner cylinder from coming out of the outer cylinder under the action of the spring during the reset process. The inner cylinder includes an inner cylinder body 15 and an end plate 16 located at the top of the inner cylinder body. The middle part of the adjusting bolt is threaded to the center of the end plate. The lower end of the adjusting bolt is located below the end plate 16, and the upper end of the adjusting bolt is located above the cylinder cover 1. The bottom of the adjusting bolt is provided with an enlarged end to facilitate pressing the upper end of the valve stem. The enlarged end consists of two nuts 14 screwed onto the bottom of the adjusting bolt to tighten and prevent rotation. The top of the adjusting bolt has an external hexagonal end for easy screwing. The diameter of the end plate is larger than the outer diameter of the inner cylinder body, and the inner wall of the outer cylinder has steps. 19. Specifically, it is a stepped hole, with a large-diameter hole 18 at the top and a small-diameter hole 20 at the bottom. The diameter of the small-diameter hole is slightly larger than the outer diameter of the inner cylinder. A step is formed at the junction of the large-diameter hole and the small-diameter hole. The spring 12 is located on the inner cylinder between the end plate and the step. The locking and releasing mechanism includes a first locking hole 17 at the lower end of the inner cylinder, a second locking hole 13 on the outer cylinder, an L-shaped locking piece 5 that is pitch-rotatably mounted on both sides of the outer cylinder through a hinge structure, and a torsion spring 6 that applies an upward torque to the inner end of the L-shaped locking piece. In this embodiment, the torsion spring is a double torsion spring. The L-shaped lock has a hinge hole in the middle, with the inner end of the hinge hole serving as the latch and the outer end as the handle. The hinge structure is located at the outer end of the upper wall of the second lock hole. The second lock hole provides space for the latch to move downwards to unlock. Specifically, the axial section of the second lock hole is a right-angled trapezoid, including an upper right-angled side, a lower inclined side that slopes downwards and inwards, an outer short base, and an inner long base. The upper wall of the second lock hole engages with the latch, and the inclined lower wall of the second lock hole provides space for the latch to move downwards to unlock. The hinge structure includes two parallel vertical plates 8 fixed to the outer end of the upper wall of the second lock hole, and a pin 7 rotatably inserted into the two vertical plates and the hinge hole. A torsion spring is sleeved on the pin, with both ends fixed to the handle and the outer wall of the outer cylinder above the second lock hole, respectively. When in use, the latch is inserted into the first and second lock holes. With the torque of the torsion spring and the blocking action of the upper hole wall, the inner and outer cylinders are positioned and locked. Press the handle radially in the axial direction, and the inner end of the latch rotates downward, eventually disengaging from the first lock hole. Under the action of the spring, the inner cylinder quickly rises and rebounds to its original position, thus unlocking the inner and outer cylinders.

[0032] The inner wall of the upper part of the outer cylinder has a vertical guide groove 11, and a guide block 10 is provided on the end plate to guide and cooperate with the guide groove. This can prevent the inner cylinder from rotating and limit its movement, and guide it in the axial direction, making the up-and-down movement of the inner cylinder more stable, and ensuring that the first locking hole and the second locking hole are aligned in the axial direction during the up-and-down movement of the inner cylinder. The outer circumferential surface of the top of the outer cylinder has an external thread 9, and the cylinder cover has an internal thread. The cylinder cover can be detachably screwed and fixed to the top of the outer cylinder. In addition, multiple limiting protrusions 22 are evenly distributed on the outer circumferential surface of the inner cylinder below the first locking hole, which radially limit the movement of the inner and outer cylinders, making the up-and-down movement of the inner cylinder in the outer cylinder more stable.

[0033] The tool used in this embodiment for testing the shut-off pressure of a gas pressure regulator without interrupting gas flow is operated as follows: First, press the adjusting bolt to press the inner cylinder into the locking and releasing mechanism position and lock it in place. Then, place the outer cylinder onto the adjusting cylinder of the gas pressure regulator and tighten the fixing screw to secure the outer cylinder to the adjusting cylinder. Next, tighten the adjusting bolt so that it passes downward through the spring cover and reaches the upper end of the valve stem. Then, begin the test: Continue tightening the adjusting bolt to directly press the valve stem downward. The valve stem moves the inner end of the lever downward, and the other end of the lever pulls the adjusting rod upward, increasing the opening of the gas pressure regulator valve and forcibly increasing the outlet pressure of the gas pressure regulator. When the outlet pressure of the gas pressure regulator reaches the shut-off pressure set by the shut-off valve, the shut-off valve cuts off the gas pipeline. During this process, observe the pressure change before and after the cut-off, and whether the outlet pressure of the gas pressure regulator reaches or exceeds the set shut-off pressure when the gas pipeline is cut off. Then, quickly press the locking release mechanism to unlock the inner cylinder. The inner cylinder instantly jumps upwards to reset under the action of the spring, the adjusting bolt disengages from the valve stem, and the valve stem rises under the action of the pressure regulating spring and the main diaphragm. Pressing the locking release mechanism again quickly resets the shut-off valve, restoring gas supply. The entire testing process takes approximately 20 seconds, and the shut-off valve only takes about 5 seconds from cutting off the gas supply to resetting and restoring it. Even if the user uses gas during this process, the change in the natural gas pressure in the user's pipeline is small and within the normal fluctuation range. During testing, there is no need to stop the gas supply at the user's end; it allows for uninterrupted gas pressure testing of the gas regulator. This utility model's testing tool has a simple structure, ingenious design, and high testing efficiency. Uninterrupted testing avoids the safety hazard of gas leaks caused by users forgetting to turn off the gas valve during testing.

[0034] The embodiments described herein are merely preferred embodiments of the present invention. Those skilled in the art to which this invention pertains may make any modifications, additions, or equivalent substitutions to the described embodiments without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A tool for testing the pressure cut-off of a gas pressure regulator without interrupting gas flow, characterized in that: The device includes an outer cylinder, a cap fixed to the top of the outer cylinder, an inner cylinder slidably disposed within the outer cylinder along its axis, a spring disposed between the inner and outer cylinders, locking and releasing mechanisms disposed on both sides of the outer cylinder, and multiple fixing screws radially screwed onto the lower part of the outer cylinder. An adjusting bolt is movably inserted into the center of the cap. The inner cylinder includes an inner cylinder body and an end plate disposed at the top of the inner cylinder body. The center of the adjusting bolt is threadedly connected to the center of the end plate. The lower end of the adjusting bolt is located below the end plate, and the upper end of the adjusting bolt is located above the cap. The diameter of the end plate is greater than [missing information]. The outer diameter of the inner cylinder, the inner wall of the outer cylinder having a step, the spring being located on the inner cylinder between the end plate and the step, the locking and releasing mechanism including a first locking hole at the lower end of the inner cylinder, a second locking hole on the outer cylinder, an L-shaped locking member that is pivotally mounted on both sides of the outer cylinder via a hinge structure, and a torsion spring that applies an upward torque to the inner end of the L-shaped locking member, the middle part of the L-shaped locking member having a hinge hole, the inner end of the hinge hole being a latch, the outer end of the hinge hole being a handle, the hinge structure being located at the outer end of the upper wall of the second locking hole, and the second locking hole having space in the vertical direction for the latch to move downward to unlock.

2. The tool for uninterrupted gas pressure cut-off testing of a gas pressure regulator according to claim 1, characterized in that: The hinge structure includes two parallel vertical plates fixed to the outer end of the upper wall of the second lock hole, a pin rotatably inserted into the two vertical plates and the hinge hole, and a torsion spring sleeved on the pin with its two ends fixed to the handle and the outer wall of the outer cylinder above the second lock hole, respectively.

3. The tool for uninterrupted gas pressure cut-off testing of a gas pressure regulator according to claim 2, characterized in that: The torsion spring is a double torsion spring.

4. The tool for uninterrupted gas pressure cut-off testing of a gas pressure regulator according to claim 3, characterized in that: The axial cross-section of the second lock hole is a right trapezoid, including an upper right-angled side, a lower inclined side that slopes downward and inward, an outer short base side, and an inner long base side. The upper wall of the second lock hole is engaged with the bolt, and the inclined lower wall of the second lock hole provides space for the bolt to move downward to unlock.

5. The tool for uninterrupted gas pressure cut-off testing of a gas pressure regulator according to any one of claims 1-4, characterized in that: The inner wall of the upper part of the outer cylinder has a vertical guide groove, and the end plate is provided with a guide block that guides and cooperates with the guide groove.

6. The tool for uninterrupted gas pressure cut-off testing of a gas pressure regulator according to any one of claims 1-4, characterized in that: The bottom of the adjusting bolt is provided with an enlarged end.

7. The tool for uninterrupted gas pressure cut-off testing of a gas pressure regulator according to claim 6, characterized in that: The enlarged end consists of two nuts screwed onto the bottom of the adjusting bolt.

8. The tool for uninterrupted gas pressure cut-off testing of a gas pressure regulator according to claim 7, characterized in that: The top of the adjusting bolt has an external hexagonal end for easy screwing.

9. The tool for uninterrupted gas pressure cut-off testing of a gas pressure regulator according to any one of claims 1-4, characterized in that: The outer cylinder has an external thread on its top outer circumferential surface, and the cylinder cover has an internal thread. The cylinder cover is detachably screwed onto the top of the outer cylinder.

10. The tool for uninterrupted gas pressure cut-off testing of a gas pressure regulator according to any one of claims 1-4, characterized in that: Multiple limiting protrusions are evenly distributed on the outer circumferential surface of the inner cylinder below the first lock hole.

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