Leak-proof gas ball valve

Abstract

The utility model relates to the technical field of gas ball valves, and discloses a leakproof gas ball valve which comprises a valve body, a ball core is arranged in the valve body, a valve rod seat is arranged on the valve body, a valve cover is arranged on the valve rod seat, a sealing device is arranged on the valve cover, a valve rod is arranged on the sealing device, and the valve rod is connected with the valve rod. A connecting assembly is arranged on the valve rod, a gas inlet end and a gas outlet end are arranged on the valve body, a cut-off assembly is arranged at the gas inlet end, a recycling assembly is arranged on the cut-off assembly, a gas sensitive sensor is arranged on the sealing equipment, and an alarm unit is arranged on the valve body. The gas flow can be quickly cut off through the cut-off assembly when the alarm unit gives an alarm, the safety barrier is recovered through the recovery assembly, slow response of a traditional manual or mechanical cut-off system is avoided, the safety is remarkably improved, the maintenance process of the valve rod is simplified through the connecting assembly, the maintenance time is shortened, and the service life of the valve rod is prolonged. The operation difficulty is reduced.

Description

Technical Field

[0001] This utility model relates to the field of gas ball valve technology, and in particular to a leak-proof gas ball valve. Background Technology

[0002] A leak-proof gas ball valve is a valve specifically designed to prevent gas leaks. Typically used in gas pipeline systems, the ball valve controls the flow of gas through the rotation of a ball, ensuring the proper transmission of gas in the pipeline while preventing leaks at valve connections.

[0003] A search revealed that Chinese Patent CN217003294U discloses a leak-proof gas ball valve, comprising a valve body, valve stem, ball core, valve cover, gas sensor, and sealing unit. The sealing unit includes a first sealing component, a first pressure plate, a second sealing component, and a second pressure plate. An annular pressure block is provided inside the valve cover, with the end of the annular pressure block away from the valve cover corresponding to the second pressure plate. The gas sensor detects the gas concentration in the sealing cavity in real time. When the gas concentration in the sealing cavity exceeds a preset threshold, the valve cover is threaded to the valve stem seat, and during the tightening of the valve cover, the annular pressure block applies force to the second pressure plate, thereby ensuring that the sealing components in the sealing cavity fit tightly. As the first and second sealing components wear out sequentially, the tightening degree of the valve cover is adjusted so that there is always a sealing component sealing the valve stem, thereby improving the service life of the gas ball valve.

[0004] While existing gas-sensitive detection systems can detect gas leaks, they often lack sufficient linkage control functions. Once a gas sensor detects a leak, the system typically only issues an alarm. This approach is not only slow to respond but also prone to human error or misoperation. Especially in emergencies, delayed human intervention can worsen the leak. Secondly, in existing technologies, valve stem replacement and maintenance often require complex disassembly operations. Replacing the valve stem usually necessitates disassembling the entire valve body or other connecting components. This process is time-consuming, labor-intensive, and requires specialized technicians, increasing maintenance difficulty and extending valve downtime. Therefore, a leak-proof gas ball valve is proposed to address these issues. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a leak-proof gas ball valve, which aims to improve the existing gas-sensitive detection system. Although it can detect gas leaks, it usually only issues an alarm and lacks linkage control with other safety components, resulting in slow response speed and susceptibility to human operation. In particular, it may delay handling in emergency situations, increase the risk of leakage, and solve the problems of complex disassembly operations required for traditional valve stem replacement and maintenance, which are time-consuming and labor-intensive.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a leak-proof gas ball valve, comprising a valve body, a ball core disposed within the valve body, a valve stem seat disposed on the valve body, a valve cover disposed on the valve stem seat, a sealing device disposed on the valve cover, a valve stem disposed on the sealing device, a connecting assembly disposed on the valve stem, an inlet end and an outlet end disposed on the valve body, a cut-off assembly disposed on the inlet end, and a recovery assembly disposed on the cut-off assembly;

[0007] The cutting assembly includes a cutting connecting block, which is disposed on the air intake end. The cutting connecting block contains a placement block one and a placement block two. A sealing assembly is disposed between the placement block one and the placement block two. A slot is provided on the placement block one, and a baffle is provided on the slot. A traction assembly is provided on the cutting connecting block.

[0008] As a further description of the above technical solution:

[0009] The valve stem includes a first rod body, a second rod body, and a rotating handle. The first rod body is mounted on the sealing device, and the first rod body and the second rod body are connected by a connecting assembly. The rotating handle is mounted on the second rod body.

[0010] As a further description of the above technical solution:

[0011] The connecting assembly includes a connecting pipe disposed on a first rod body. A wedge groove is formed on the connecting pipe, a wedge block is disposed in the wedge groove, a connecting shaft is disposed on the wedge block, a plurality of connecting slots are formed in a ring on the connecting pipe, connecting steel balls are disposed in the connecting slots, a plurality of connecting slots are formed in a ring on the connecting shaft, and a disassembly assembly is disposed on the connecting pipe.

[0012] As a further description of the above technical solution:

[0013] The disassembly assembly includes a disassembly sleeve, which is disposed on the connecting pipe, and a quick-release spring is provided between the connecting pipe and the disassembly sleeve.

[0014] As a further description of the above technical solution:

[0015] The sealing assembly includes a second wedge block, which is disposed on the second placement block, and the second placement block has a second wedge groove.

[0016] As a further description of the above technical solution:

[0017] The traction assembly includes a winding motor, which is disposed within the cutting and connecting block. The output end of the winding motor is fixedly connected to a winding shaft. The winding shaft is connected to placement block one and placement block two via a connecting rope. A storage groove is provided within the cutting and connecting block. The inner wall of the storage groove is connected to placement block one and placement block two via a return spring.

[0018] As a further description of the above technical solution:

[0019] The recycling assembly includes two sets of recycling blocks, which are set on the cutting and connecting block. A recycling shaft is provided between the recycling blocks, and the recycling shaft is connected to the baffle by a pull rope. One set of recycling blocks is provided with a rotating handle, and both the first and second placement blocks have through holes.

[0020] As a further description of the above technical solution:

[0021] The sealing device is equipped with a gas-sensitive sensor, and the valve body is equipped with an alarm unit, which includes a buzzer and a warning light.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, the winding motor causes the winding shaft to rotate, and the rotating winding shaft can wind up the connecting rope. The placing block is then taken into the storage groove through the connecting rope, and the baffle falls into the gas inlet end. It can respond quickly and automatically cut off the gas flow in the event of a gas leak. The baffle is then taken back into the cutting connecting block through the recovery shaft, ensuring that the safety barrier is immediately restored when the sealing device fails. Compared with the traditional manual shut-off or single mechanical shut-off system in the prior art, this design not only improves the response speed but also avoids the complexity of manual intervention, significantly improving safety.

[0024] 2. In this utility model, by sliding the disassembly sleeve and squeezing the quick-release spring, the connecting steel ball can no longer restrict the movement of the connecting shaft. At this time, the wedge block, the connecting shaft, and the second rod can be removed from the second rod, which simplifies the maintenance process. Compared with the traditional design that requires complex disassembly, it greatly shortens the maintenance time, reduces the difficulty of operation, ensures the long-term stable operation of the valve, and reduces maintenance costs. Attached Figure Description

[0025] Figure 1 This is a perspective view of a leak-proof gas ball valve proposed in this utility model;

[0026] Figure 2 This is a cross-sectional structural diagram of a leak-proof gas ball valve proposed in this utility model.

[0027] Figure 3This is a schematic diagram of part of the valve stem structure of a leak-proof gas ball valve proposed in this utility model;

[0028] Figure 4 This is a schematic diagram of the connection assembly structure of a leak-proof gas ball valve proposed in this utility model.

[0029] Figure 5 This is a schematic diagram of the shut-off assembly structure of a leak-proof gas ball valve proposed in this utility model;

[0030] Figure 6 This is a schematic diagram of the shut-off assembly of a leak-proof gas ball valve proposed in this utility model.

[0031] Figure 7 for Figure 1 Enlarged view of point A in the middle;

[0032] Figure 8 for Figure 4 Enlarged view of point B in the middle.

[0033] Legend:

[0034] 1. Valve body; 2. Valve stem; 201. First stem; 202. Second stem; 203. Rotary handle one; 3. Ball core; 4. Valve cover; 5. Gas sensor; 6. Sealing device; 7. Inlet end; 8. Outlet end; 9. Valve stem seat; 10. Alarm unit; 1001. Buzzer; 1002. Warning light; 11. Connecting assembly; 1101. Wedge one; 1102. Wedge groove one; 1103. Connecting pipe; 1104. Connecting shaft; 1105. Connecting groove one; 1106. Connecting groove two; 1107. Connecting steel ball; 1108. 1109. Disassembly sleeve; 12. Quick-release spring; 13. Cutting assembly; 14. Cutting connecting block; 15. Baffle; 16. Placement block one; 17. Placement block two; 18. Wedge groove two; 19. Wedge block two; 10. Connecting rope; 12. Storage slot; 12. Return spring; 12. Rewinding shaft; 13. Rewinding motor; 14. Slot; 15. Recycling assembly; 16. Pull rope; 17. Through hole; 18. Recycling block; 19. Recycling shaft; 10. Rotating handle two. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 8 An embodiment of this utility model is provided: a leak-proof gas ball valve, including a valve body 1, a ball core 3 disposed inside the valve body 1, a valve stem seat 9 disposed on the valve body 1, a valve cover 4 disposed on the valve stem seat 9, a sealing device 6 disposed on the valve cover 4, a valve stem 2 disposed on the sealing device 6, and a connecting assembly 11 disposed on the valve stem 2.

[0037] The valve stem 2 includes a first stem body 201, a second stem body 202, and a rotating handle 203. The first stem body 201 is mounted on the sealing device 6. The first stem body 201 and the second stem body 202 are connected by a connecting assembly 11. The rotating handle 203 is mounted on the second stem body 202.

[0038] The connecting assembly 11 includes a connecting pipe 1103, which is disposed on the first rod body 201. A wedge groove 1102 is formed on the connecting pipe 1103, a wedge block 1101 is disposed in the wedge groove 1102, a connecting shaft 1104 is disposed on the wedge block 1101, a plurality of connecting grooves 1105 are formed in an annular pattern on the connecting pipe 1103, connecting steel balls 1107 are disposed in the connecting grooves 1105, a plurality of connecting grooves 1106 are formed in an annular pattern on the connecting shaft 1104, and a disassembly assembly is disposed on the connecting pipe 1103.

[0039] The disassembly assembly includes a disassembly sleeve 1108, which is mounted on the connecting pipe 1103. A quick-release spring 1109 is provided between the connecting pipe 1103 and the disassembly sleeve 1108.

[0040] Specifically, the valve body 1 is the main body of the entire leak-proof gas ball valve, responsible for accommodating all other internal components. The ball core 3 controls the flow direction of gas by rotation, thereby realizing the valve's opening and closing function. The valve stem seat 9 is fixed above the valve body 1, serving as a support component for the valve stem 2, ensuring that the valve stem 2 rotates stably during operation and withstands operating pressure. The valve cover 4 can achieve the sealing effect of the valve body 1. The sealing device 6 is usually a sealing rubber ring, etc., to prevent gas leakage from the valve body 1.

[0041] The rotating handle 203 provides the working arm for manually opening the valve. The connecting pipe 1103 and the connecting shaft 1104 serve as the mounting base for the connecting assembly 11. By utilizing the engagement between the wedge block 1101 and the wedge groove 1102, the movement generated by the second rod 202 driven by the rotating handle 203 can be transmitted to the first rod 201. The first rod 201 is used to control the rotation of the ball core 3. The connecting groove 1105 provides a place for the setting of the connecting steel ball 1107. The disassembly sleeve 1108 serves as the operating component for manual disassembly and can also restrict the position of the connecting steel ball 1107, allowing the connecting steel ball 1107 to enter the connecting groove 1106 of the connecting shaft 1104, thereby fixing the connecting shaft 1104. The elastic potential energy of the quick-release spring 1109 is the key to achieving quick disassembly and assembly.

[0042] Reference Figure 1 , Figure 2 , Figure 5 and Figure 6 The valve body 1 is provided with an air inlet end 7 and an air outlet end 8. The air inlet end 7 is provided with a cut-off assembly 12. The cut-off assembly 12 includes a cut-off connecting block 1201. The cut-off connecting block 1201 is provided on the air inlet end 7. The cut-off connecting block 1201 is provided with a placement block 1203 and a placement block 2 1204. A sealing assembly is provided between the placement block 1203 and the placement block 2 1204. A slot 1212 is provided on the placement block 1203. A baffle 1202 is provided on the slot 1212. A traction assembly is provided on the cut-off connecting block 1201.

[0043] The sealing assembly includes a second wedge 1206, which is disposed on a second placement block 1204, and a second wedge groove 1205 is provided on the first placement block 1203;

[0044] The traction assembly includes a winding motor 1211, which is disposed inside the cutting and connecting block 1201. The output end of the winding motor 1211 is fixedly connected to a winding shaft 1210. The winding shaft 1210 is connected to the first placement block 1203 and the second placement block 1204 by a connecting rope 1207. A storage groove 1208 is provided inside the cutting and connecting block 1201. The inner wall of the storage groove 1208 is connected to the first placement block 1203 and the second placement block 1204 by a return spring 1209.

[0045] Specifically, the cut-off connection block 1201 serves as the installation location for the cut-off assembly 12, while the placement block 1203 and placement block 2 1204 serve as components for accommodating and fixing the baffle 1202. They also act as sealing components inside the cut-off connection block 1201. The placement block 1203 and placement block 2 1204, through the wedge block 2 1206 and wedge groove 2 1205, ensure that when gas flows into the valve body 1 at the inlet end 7, the gas does not enter the cut-off connection block 1201.

[0046] The slot 1212 provides a place for fixing the baffle 1202. The baffle 1202 can fall into the air inlet 7 when there is a gas leak, so that the gas is restricted from the source. The winding motor 1211 is the power source for controlling the movement of the first placement block 1203 and the second placement block 1204. The winding motor 1211 causes the winding shaft 1210 to rotate. The rotating winding shaft 1210 can wind up the connecting rope 1207. The storage slot 1208 can accommodate the first placement block 1203 and the second placement block 1204 and provide space for the installation of the return spring 1209. Through the connecting action of the connecting rope 1207, the first placement block 1203 and the second placement block 1204 are put into the storage slot 1208. The elastic potential energy of the return spring 1209 enables the first placement block 1203 and the second placement block 1204 to quickly return to their original positions.

[0047] Reference Figure 1 , Figure 2 and Figure 7 The cutting component 12 is provided with a recycling component 13. The recycling component 13 includes two sets of recycling blocks 1303. The two sets of recycling blocks 1303 are provided on the cutting connecting block 1201. A recycling shaft 1304 is provided between the recycling blocks 1303. The recycling shaft 1304 is connected to the baffle 1202 by a pull rope 1301. One set of recycling blocks 1303 is provided with a rotating handle 1305. Both the first placement block 1203 and the second placement block 1204 are provided with through holes 1302.

[0048] The sealing device 6 is equipped with a gas sensor 5, and the valve body 1 is equipped with an alarm unit 10, which includes a buzzer 1001 and a warning light 1002.

[0049] Specifically, the recycling block 1303 serves as the mounting base for the recycling component 13, the recycling shaft 1304 is used to wind up the pull rope 1301 to achieve the pulling effect of the pull rope 1301, the rotating handle 1305 is a component that allows manual rotation of the recycling shaft 1304, and the perforation 1302 is designed so that when the baffle 1202 enters the air inlet 7, the placement block 1203 and the placement block 1204 can achieve a seal without damaging the pull rope 1301, providing a space for the pull rope 1301 to be placed.

[0050] The gas sensor 5 can detect the sealing effect of the sealing device 6 in real time. The buzzer 1001 and the warning light 1002 can emit sound and light when the gas sensor 5 detects a gas leak to alert people around, providing a basis for timely valve closure.

[0051] Working principle: When gas flows, the ball core 3 is opened by rotating the handle 203. Gas enters from the inlet end 7 and exits from the outlet end 8. The gas sensor 5 detects the sealing device 6. When the sealing device 6 fails and gas escapes, the gas sensor 5 will activate the buzzer and warning light 1002, and start the winding motor 1211. The winding motor 1211 causes the winding shaft 1210 to rotate. The rotating winding shaft 1210 winds up the connecting rope 1207, causing the placement block 1203 and placement block 2 1204 to enter the storage slot 1208. At this time, the return spring 1209 is compressed, and the clamping plate is not blocked by the placement block 1203 and the placement block. Under the action of gravity, it falls off the cutting connection block 1201 and blocks the inlet end 7. The operator rotates the handle 203 again to close the ball core 3.

[0052] After repairing the sealing device 6, the recovery shaft 1304 is rotated by turning the handle 1305. The rotating recovery shaft 1304 winds up the pull rope 1301, retracting the baffle 1202 into the cutting connection block 1201. Then the reset spring 1209 resets, and the placement block 1203 and placement block 2 1204 are engaged by the wedge block 2 1206 and the wedge groove 2 1205. The plate is recovered and fixed in the groove 1212.

[0053] When the second valve stem 2 needs maintenance and replacement during long-term use in gas, the sliding disassembly sleeve 1108 is used. The disassembly sleeve 1108 compresses the quick-release spring 1109, at which point the connecting shaft 1104 is pulled upwards, and the connecting steel ball 1107 returns to the connecting groove 1105. Then, the replacement second valve body 1 is connected, and the wedge block 1101 on the new connecting shaft 1104 is inserted into the wedge groove 1102. Then, the disassembly sleeve 1108 is released, and the quick-release spring 1109 resets the disassembly sleeve 1108. The connecting steel ball 1107 is pushed into the connecting groove 1106 in the connecting shaft 1104, thus fixing the connecting shaft 1104 and the second valve body 1.

[0054] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A leak-proof gas ball valve comprising a valve body (1), characterized in that: The valve body (1) is provided with a ball core (3), the valve body (1) is provided with a valve rod seat (9), the valve rod seat (9) is provided with a valve cover (4), the valve cover (4) is provided with a sealing device (6), the sealing device (6) is provided with a valve rod (2), the valve rod (2) is provided with a connecting assembly (11), the valve body (1) is provided with an air inlet end (7) and an air outlet end (8), the air inlet end (7) is provided with a cutting assembly (12), the cutting assembly (12) is provided with a recycling assembly (13). The cutting assembly (12) includes a cutting connecting block (1201), the cutting connecting block (1201) is arranged on the air inlet end (7), the cutting connecting block (1201) is provided with a placing block one (1203) and a placing block two (1204), the sealing assembly is arranged between the placing block one (1203) and the placing block two (1204), the placing block one (1203) is provided with a clamping groove (1212), the clamping groove (1212) is provided with a baffle (1202), the cutting connecting block (1201) is provided with a traction assembly.

2. A gas leak-proof ball valve according to claim 1, characterized in that: The valve rod (2) includes a first rod body (201), a second rod body (202) and a rotating handle one (203), the first rod body (201) is arranged on the sealing device (6), the first rod body (201) is connected with the second rod body (202) through the connecting assembly (11), and the rotating handle one (203) is arranged on the second rod body (202).

3. A gas leak-proof ball valve as claimed in claim 1, wherein: The connecting assembly (11) includes a connecting pipe (1103), the connecting pipe (1103) is arranged on the first rod body (201), the connecting pipe (1103) is provided with a wedge groove one (1102), the wedge groove one (1102) is provided with a wedge block one (1101), the wedge block one (1101) is provided with a connecting shaft (1104), the connecting pipe (1103) is annularly provided with a plurality of connecting grooves one (1105), the connecting grooves one (1105) are provided with connecting steel balls (1107), the connecting shaft (1104) is annularly provided with a plurality of connecting grooves two (1106), and the connecting pipe (1103) is provided with a dismounting assembly.

4. A gas leak-proof ball valve according to claim 3, characterized in that: The dismounting assembly includes a dismounting sleeve (1108), the dismounting sleeve (1108) is arranged on the connecting pipe (1103), and the connecting pipe (1103) and the dismounting sleeve (1108) are provided with a quick release spring (1109).

5. A gas leakproof ball valve according to claim 1, characterized in that: The sealing assembly includes a wedge block two (1206), the wedge block two (1206) is arranged on the placing block two (1204), and the placing block one (1203) is provided with a wedge groove two (1205).

6. A gas leakproof ball valve according to claim 1, characterized in that: The traction assembly includes a winding motor (1211) arranged in the cut-off connecting block (1201), an output end of the winding motor (1211) is fixedly connected with a winding shaft (1210), the winding shaft (1210) is connected with the placing block one (1203) and the placing block two (1204) through a connecting rope (1207), a receiving groove (1208) is arranged in the cut-off connecting block (1201), and inner walls of the receiving groove (1208) are connected with the placing block one (1203) and the placing block two (1204) through a reset spring (1209).

7. A gas leak-proof ball valve according to claim 1, wherein: The recycling assembly (13) includes two groups of recycling blocks (1303), the two groups of recycling blocks (1303) are arranged on the cut-off connecting block (1201), recycling shafts (1304) are arranged between the recycling blocks (1303), the recycling shafts (1304) are connected with the baffle (1202) through pull ropes (1301), one group of the recycling blocks (1303) is provided with a rotating handle two (1305), and the placing block one (1203) and the placing block two (1204) are both provided with perforations (1302).

8. A gas leak-proof ball valve according to claim 1, wherein: The sealing device (6) is provided with a gas-sensitive sensor (5), the valve body (1) is provided with an alarm unit (10), and the alarm unit (10) includes a buzzer (1001) and a warning light (1002).

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