An integrated natural gas valve that is easy to open and close and maintain

Abstract

The present invention belongs to the technical field of integrated valves, and specifically discloses an integrated natural gas valve that is easy to open and close and maintain, comprising a valve body assembly, an automatic valve core mechanism, and a tightening mechanism. The valve body assembly comprises a valve seat and a valve cover, the automatic valve core mechanism comprises a valve core assembly and a strut assembly, the valve core assembly and the strut assembly being symmetrically arranged in the valve seat, the tightening mechanism comprising a snap-fit ​​assembly, an elastic locking assembly, and a pre-unlocking assembly, the snap-fit ​​assembly being annularly arranged on the valve seat and the valve cover, the elastic locking assembly being arranged on the snap-fit ​​assembly, and the pre-unlocking assembly being arranged on the valve cover. This solution can automatically close the valve core assembly from the inside when the valve cover is removed, and can automatically open the valve core assembly when the valve cover is installed. This can solve the problem of natural gas leakage caused by improper operation during valve maintenance without relying on human experience and caution.

Description

Technical Field

[0001] The present invention belongs to the technical field of integrated valves, and in particular relates to an integrated natural gas valve that is easy to switch and maintain. Background Art

[0002] In natural gas transmission pipelines, various valves are often required. These include ball valves or butterfly valves with simple structures and functions, as well as relatively complex throttle valves, stop valves, vent valves, and even integrated multi-functional monitoring valves that have multiple of the above functions. Generally speaking, the more functions a valve has and the more complex its structure, the higher the frequency and importance of its maintenance and inspection.

[0003] Pipes and valves that transport different media require different design emphases. The importance of leak prevention is determined by the probability of leakage and the degree of danger after the leakage. For example, even if a water pipe leaks, the danger is generally not great. However, if a natural gas leak occurs, it may cause a large-scale explosion and fire, so the importance of leak prevention is obviously higher.

[0004] However, the general setting of natural gas pipelines and valves is the same as that of water pipes. A ball valve or butterfly valve is set at each end of the integrated valve. When maintaining the integrated electric valve, it is necessary to close the small valves at both ends first; but in actual operation, the above steps can only be guided and standardized by the operation manual, and cannot be restricted by technical means. If forgotten or not operated properly, it will cause a large amount of natural gas to leak in a short period of time; although the probability of such an accident is not high, once it occurs, it is extremely dangerous (even the possibility of intentional leakage of natural gas from the valve cannot be ruled out), so it is necessary to eliminate dependence on people and solve the above problems through technical means.

[0005] In addition, the traditional method of installing ball valves or butterfly valves at both ends of the integrated valve will also take up a longer installation space (because the valves cannot be directly connected to each other, they need to be connected through a pipe, and the length of the pipe must meet certain standards), which increases the difficulty of installing the integrated valve in a small space.

[0006] Patent publication number CN119163807B discloses an automatic regulating fire valve, claiming that it is possible to operate the valve without closing the main valve during maintenance. However, its function is essentially similar to that of an ordinary butterfly valve, and there are many operating steps, and there may still be changes or omissions in the order between the steps, so there is still the possibility of misoperation. Summary of the Invention

[0007] In view of the above situation, in order to overcome the defects of the prior art, the present invention proposes an integrated natural gas valve that strictly limits the opening and closing sequence of the valve through structural limits and is easy to switch and maintain; this solution can automatically complete the closing of the valve core assembly from the inside when removing the valve cover, and can automatically open the valve core assembly when installing the valve cover, and can automatically complete the locking of the valve cover through the elastic locking assembly after the valve cover is installed in place. If the valve cover is to be removed, the cooperation of two independent steps is required; through the above technical means, the problem of natural gas leakage easily caused by improper operation during valve maintenance can be solved without relying on human experience and caution.

[0008] The position of the hinged support rod can be maintained by the magnetic sticker, so that the valve cover can automatically complete the separation and combination of the lever and the hinged support rod when disassembling and installing.

[0009] The technical solution adopted by the present invention is as follows: The present invention proposes an integrated natural gas valve that is easy to switch and maintain, including a valve body assembly, an automatic valve core mechanism and a tightening mechanism. The valve body assembly includes a valve seat and a valve cover. The automatic valve core mechanism includes a valve core assembly and a strut assembly. The valve core assembly and the strut assembly are symmetrically arranged in the valve seat. The tightening mechanism includes a clamping assembly, an elastic locking assembly and a pre-unlocking assembly. The clamping assembly is annularly arranged on the valve seat and the valve cover. The elastic locking assembly is arranged on the clamping assembly, and the pre-unlocking assembly is arranged on the valve cover.

[0010] The split design allows the main body of the monitoring module to be disassembled without completely disassembling the valve body assembly, and the larger opening on the valve seat provides sufficient maintenance space for the monitoring module that cannot be disassembled.

[0011] Furthermore, a connecting tube is symmetrically provided on the valve seat, an internal ring is provided in the valve cover, and the valve core assembly includes a fixed retaining ring, a closing and returning spring and a floating valve core. The fixed retaining ring is fixed in the connecting tube, and the floating valve core is snap-fitted and slidably provided in the connecting tube. The closing and returning spring is provided between the fixed retaining ring and the floating valve core.

[0012] Preferably, the strut assembly includes a hinged strut and a shift rod, the shift rod is fixed to the inner ring, the two ends of the hinged strut are hinged to the shift rod and the floating valve core respectively, a magnetic sticker is provided on the inner wall of the connection between the valve seat and the connecting pipe, and the hinged strut can be attracted by the magnetic sticker, so that when the valve cover is removed, the hinged strut can maintain its position, thereby ensuring that the shift rod can be inserted into the shift slide hole when the valve cover is installed next time.

[0013] The lever can be used to control the engagement and separation of the fixed retaining ring and the floating valve core, thereby controlling the penetration and closure of the part. By closing the connecting pipe, natural gas leakage inside the pipeline can be avoided during maintenance.

[0014] As a further preferred embodiment of the present invention, a spring groove is provided on the fixed retaining ring, one end of the closing reset spring is provided in the spring groove, the outer ring of the floating valve core is provided with a hollow bracket, the other end of the spring groove is provided on the hollow bracket, and a rubber ring for sealing is provided at the portion of the floating valve core that fits with the fixed retaining ring.

[0015] Under the pulling force of the closing and returning spring, the floating valve core and the fixed retaining ring tend to approach and combine with each other, and the extrusion force and sealing performance of the two increase with the increase of the internal pressure of the pipeline, thereby achieving the technical purpose of ensuring the closing effect of the connecting pipe regardless of the internal pressure of the pipeline.

[0016] As a further preferred embodiment of the present invention, the strut assembly also includes a hinged head and a hinged pin, the hinged head is fixedly connected to the floating valve core, the hinged pin is arranged in the hinged head, one end of the hinged strut is rotatably arranged on the hinged pin, and the other end of the hinged strut is provided with a toggle slide hole, and the toggle rod can slide and rotate in the toggle slide hole.

[0017] By hingedly connecting the support rod and the lever, the valve core assembly and the valve cover can be matched, and the technical effect of automatically closing the valve core assembly when removing the valve cover and automatically opening the valve core assembly when installing the valve cover can be achieved without the need for other operating steps. This completely eliminates the possibility of human error and basically eliminates the possibility of natural gas leakage in the pipeline when removing the valve cover.

[0018] Furthermore, the clamping assembly includes a fixed clamping seat and a rotating clamping clip, the fixed clamping seat is fixed to the valve seat, and the rotating clamping clip is fixed to the valve cover. The fixed clamping seat and the rotating clamping clip are respectively provided with a clamping seat slope portion and a clamping clip slope portion that cooperate with each other. Through the cooperation of the clamping seat slope portion and the clamping clip slope portion, the extrusion force on the sealing ring can be increased by rotating the valve cover.

[0019] By cooperating with the inclined surfaces of the base slope and the buckle slope, the extrusion force on the sealing ring can be gradually increased when the valve seat and the valve cover rotate relative to each other, thereby ensuring that the connection strength and the sealing performance of the sealing ring meet the target requirements.

[0020] Preferably, the elastic locking assembly includes a spring base, a sliding lock tongue and a lock tongue spring, a locking slot is provided on the fixed base, the spring base is fixed to the side of the rotating buckle, the sliding lock tongue is slidably arranged on the rotating buckle, the lock tongue spring is arranged between the spring base and the sliding lock tongue, a lock tongue bevel is provided on the top of the sliding lock tongue, and the fixed base is provided with a base bevel that matches the lock tongue bevel.

[0021] The locking and unlocking of the valve cover can be controlled by extending and retracting the sliding lock tongue in the locking slot. The connection stability of the valve cover can be improved by automatically locking the valve cover when the valve cover is rotated to a certain angle.

[0022] As a further preferred embodiment of the present invention, the pre-unlocking assembly includes a handle, a pre-unlocking floating ring and a floating ring return spring. The handle is fixed to the valve cover, the pre-unlocking floating ring is slidably arranged on the rotating buckle, the floating ring return spring is arranged between the handle and the pre-unlocking floating ring, and the bottom of the floating ring return spring is provided with an unlocking pressure block matching the sliding lock tongue.

[0023] Unlocking the valve cover requires the coordination of two steps, namely pressing down the pre-unlocking floating ring and rotating the handle. The coordination of the two steps of pre-unlocking and unlocking can avoid the problem of mislocking during normal use. The setting of two independent unlocking devices also makes this device more secure.

[0024] Furthermore, it also includes a monitoring module, which is located inside the valve seat and the valve cover.

[0025] Preferably, the valve body assembly further comprises a sealing ring, the connecting surfaces of the valve seat and the valve cover are both provided with a groove, and the sealing ring is arranged in the groove.

[0026] As a further preferred embodiment of the present invention, the end of the connecting pipe is provided with a connecting flange connected to an external pipeline.

[0027] The beneficial effects achieved by the present invention using the above structure are as follows:

[0028] (1) This solution can automatically close the valve core assembly from the inside when removing the valve cover, and can automatically open the valve core assembly when installing the valve cover. After the valve cover is installed in place, the valve cover can be automatically locked by the elastic locking assembly. If the valve cover is to be removed, two independent steps are required. Through the above technical means, the problem of natural gas leakage caused by improper operation during valve maintenance can be solved without relying on human experience and caution.

[0029] (2) Through the split design, the main part of the monitoring module can be disassembled without completely disassembling the valve body assembly, and sufficient maintenance operation space is left for the monitoring module that cannot be disassembled through the larger opening on the valve seat.

[0030] (3) The lever can be used to control the engagement and separation of the fixed retaining ring and the floating valve core, thereby controlling the penetration and closure of the part. By closing the connecting pipe, natural gas leakage inside the pipeline can be avoided during maintenance.

[0031] (4) Under the pulling force of the closing return spring, the floating valve core and the fixed retaining ring have a tendency to approach each other and combine, and the extrusion force and sealing performance of the two increase with the increase of the internal pressure of the pipeline, thereby achieving the technical purpose of ensuring the closing effect of the connecting pipe regardless of the internal pressure of the pipeline.

[0032] (5) By hingedly connecting the support rod and the lever, the valve core assembly and the valve cover can be matched, and the valve core assembly can be automatically closed when the valve cover is removed and automatically opened when the valve cover is installed without the need for other operating steps. The possibility of human error is completely eliminated, and the possibility of natural gas leakage in the pipeline when the valve cover is removed is basically eliminated.

[0033] (6) By coordinating the inclined surfaces of the seat slope and the buckle slope, the extrusion force on the sealing ring can be gradually increased when the valve seat and the valve cover rotate relative to each other, thereby ensuring that the connection strength and the sealing performance of the sealing ring meet the target requirements.

[0034] (7) The locking and unlocking of the valve cover can be controlled by extending and retracting the sliding lock tongue in the locking slot. The connection stability of the valve cover can be improved by automatically locking the valve cover when the valve cover is rotated to a certain angle.

[0035] (8) Unlocking the valve cover requires the coordination of two steps, namely, pressing down the pre-unlocking floating ring and rotating the handle. The coordination of the two steps of pre-unlocking and unlocking can avoid the problem of mis-locking during normal use. The setting of two independent unlocking devices also makes this device more secure. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A three-dimensional diagram of an integrated natural gas valve that is easy to open and close and maintain, as proposed by the present invention;

[0037] Figure 2 This is a front view of an integrated natural gas valve proposed by the present invention that is easy to open and close and maintain;

[0038] Figure 3 This is a left side view of an integrated natural gas valve proposed by the present invention that is easy to open and close and maintain;

[0039] Figure 4 for Figure 2 A cross-sectional view along the cutting line AA;

[0040] Figure 5 for Figure 3 A cross-sectional view along the cutting line BB;

[0041] Figure 6 for Figure 2 A cross-sectional view along the cutting line CC;

[0042] Figure 7 This is a schematic diagram of the explosion structure of an integrated natural gas valve proposed by the present invention that is easy to open and close and maintain;

[0043] Figure 8 for Figure 4 A partial enlarged view of point Ⅰ in the middle;

[0044] Figure 9 for Figure 5 A partial enlarged view of the middle II;

[0045] Figure 10 for Figure 7 A partial enlarged view of point III in the middle;

[0046] Figure 11 for Figure 1 A partial enlarged view of point IV in the middle.

[0047] Among them, 1. Valve body assembly, 2. Automatic valve core mechanism, 3. Tightening mechanism, 4. Monitoring module, 5. Valve seat, 6. Valve cover, 7. Sealing ring, 8. Connecting pipe, 9. Connecting flange, 10. Internal ring, 11. Valve core assembly, 12. Support rod assembly, 13. Fixed retaining ring, 14. Closed return spring, 15. Floating valve core, 16. Hinge head, 17. Hinge pin, 18. Hinge support rod, 19. Push rod, 20. Spring groove, 21. Hollow bracket, 22. Rubber ring, 23. Slide hole, 24. Snap assembly, 25. Elastic locking assembly, 26. Pre-unlocking assembly, 27. Fixed base, 28. Rotating buckle, 29. Spring base, 30. Sliding lock tongue, 31. Lock tongue spring, 32. Handle, 33. Pre-unlocking floating ring, 34. Floating ring return spring, 35. Base slope, 36. Locking slot, 37. Base angle, 38. Buckle slope, 39. Lock tongue angle, 40. Unlocking pressure block.

[0048] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0050] In the description of the present invention, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0051] like Figures 1 to 11 As shown, the present invention proposes an integrated natural gas valve that is easy to open and close and maintain, including a valve body assembly 1, an automatic valve core mechanism 2 and a tightening mechanism 3. The valve body assembly 1 includes a valve seat 5 and a valve cover 6. The automatic valve core mechanism 2 includes a valve core assembly 11 and a strut assembly 12. The valve core assembly 11 and the strut assembly 12 are symmetrically arranged in the valve seat 5. The tightening mechanism 3 includes a clamping assembly 24, an elastic locking assembly 25 and a pre-unlocking assembly 26. The clamping assembly 24 is annularly arranged on the valve seat 5 and the valve cover 6. The elastic locking assembly 25 is arranged on the clamping assembly 24. The pre-unlocking assembly 26 is arranged on the valve cover 6.

[0052] The valve body assembly 1 further includes a sealing ring 7. The connecting surfaces of the valve seat 5 and the valve cover 6 are both provided with grooves, in which the sealing ring 7 is disposed. The end of the connecting pipe 8 is provided with a connecting flange 9 connected to an external pipeline.

[0053] Through the split design, the main part of the monitoring module 4 can be disassembled without completely disassembling the valve body assembly 1, and sufficient maintenance operation space is reserved for the monitoring module 4 that cannot be disassembled through the larger opening on the valve seat 5.

[0054] A connecting pipe 8 is symmetrically provided on the valve seat 5, an internal ring 10 is provided in the valve cover 6, and the valve core assembly 11 includes a fixed retaining ring 13, a closing and returning spring 14 and a floating valve core 15. The fixed retaining ring 13 is fixedly connected to the connecting pipe 8, and the floating valve core 15 is engaged and slidably provided in the connecting pipe 8. The closing and returning spring 14 is provided between the fixed retaining ring 13 and the floating valve core 15.

[0055] The strut assembly 12 includes a hinged strut 18 and a shift rod 19. The shift rod 19 is fixed to the inner ring 10. The two ends of the hinged strut 18 are hinged to the shift rod 19 and the floating valve core 15 respectively. A magnetic sticker is provided on the inner wall of the connection between the valve seat 5 and the connecting pipe 8, and the hinged strut 18 can be attracted by the magnetic sticker, so that when the valve cover 6 is removed, the hinged strut 18 can maintain its position, thereby ensuring that the shift rod 19 can be inserted into the shift slide hole 23 when the valve cover 6 is installed next time.

[0056] The lever 19 can control the engagement and separation of the fixed retaining ring 13 and the floating valve core 15, thereby controlling the penetration and closure of the portion. By closing the connecting pipe 8, natural gas leakage inside the pipeline can be avoided during maintenance.

[0057] A spring groove 20 is provided on the fixed retaining ring 13, one end of the closing and returning spring 14 is arranged in the spring groove 20, the outer ring of the floating valve core 15 is provided with a hollow bracket 21, the other end of the spring groove 20 is arranged on the hollow bracket 21, and a rubber ring 22 for sealing is provided on the part of the floating valve core 15 that fits with the fixed retaining ring 13.

[0058] Under the pulling force of the closing return spring 14, the floating valve core 15 and the fixed retaining ring 13 have a tendency to approach and combine with each other, and the extrusion force and sealing performance of the two increase with the increase of the internal pressure of the pipeline, thereby achieving the technical purpose of ensuring the closing effect of the connecting pipe 8 regardless of the internal pressure of the pipeline.

[0059] The strut assembly 12 also includes a hinged joint 16 and a hinged pin 17. The hinged joint 16 is fixed to the floating valve core 15. The hinged pin 17 is arranged in the hinged joint 16. One end of the hinged strut 18 is rotatably arranged on the hinged pin 17. The other end of the hinged strut 18 is provided with a toggle slide hole 23. The toggle rod 19 can slide and rotate in the toggle slide hole 23.

[0060] By hingedly connecting the support rod 18 and the shift rod 19, the valve core assembly 11 and the valve cover 6 can be matched, and the technical effect of automatically closing the valve core assembly 11 when the valve cover 6 is removed and automatically opening the valve core assembly 11 when the valve cover 6 is installed can be achieved without the need for other operating steps; the possibility of human error is completely eliminated, and the possibility of natural gas leakage in the pipeline when the valve cover 6 is removed is basically eliminated.

[0061] The clamping assembly 24 includes a fixed clamping seat 27 and a rotating clamping seat 28. The fixed clamping seat 27 is fixed to the valve seat 5, and the rotating clamping seat 28 is fixed to the valve cover 6. The fixed clamping seat 27 and the rotating clamping seat 28 are respectively provided with a clamping seat slope 35 and a clamping slope 38 that cooperate with each other. Through the cooperation of the clamping seat slope 35 and the clamping slope 38, the extrusion force on the sealing ring 7 can be increased by rotating the valve cover 6.

[0062] By cooperating with the inclined surfaces of the seat slope 35 and the buckle slope 38 , the squeezing force on the sealing ring 7 can be gradually increased when the valve seat 5 and the valve cover 6 rotate relative to each other, thereby ensuring that the connection strength and the sealing performance of the sealing ring 7 meet the target requirements.

[0063] The elastic locking assembly 25 includes a spring base 29, a sliding lock tongue 30 and a lock tongue spring 31. A locking slot 36 is provided on the fixed base 27. The spring base 29 is fixed to the side of the rotating buckle 28. The sliding lock tongue 30 is slidably arranged on the rotating buckle 28. The lock tongue spring 31 is arranged between the spring base 29 and the sliding lock tongue 30. A lock tongue bevel 39 is provided on the top of the sliding lock tongue 30. The fixed base 27 is provided with a base bevel 37 that cooperates with the lock tongue bevel 39.

[0064] The locking and unlocking of the valve cover 6 can be controlled by extending and retracting the sliding lock tongue 30 in the locking slot 36 . The connection stability of the valve cover 6 can be improved by automatically locking the valve cover 6 when the valve cover 6 is rotated to a certain angle.

[0065] The pre-unlocking assembly 26 includes a handle 32, a pre-unlocking floating ring 33 and a floating ring return spring 34. The handle 32 is fixed to the valve cover 6. The pre-unlocking floating ring 33 is slidably arranged on the rotating buckle 28. The floating ring return spring 34 is arranged between the handle 32 and the pre-unlocking floating ring 33. The bottom of the floating ring return spring 34 is provided with an unlocking pressure block 40 that matches the sliding lock tongue 30.

[0066] Unlocking the valve cover 6 requires the cooperation of two steps, namely pressing down the pre-unlocking floating ring 33 and rotating the handle 32. The cooperation of the two steps of pre-unlocking and unlocking can avoid the problem of mislocking during normal use. The setting of two independent unlocking devices also makes the device more secure.

[0067] The valve body further comprises a monitoring module 4 , which is located inside the valve seat 5 and the valve cover 6 .

[0068] During specific use, the valve seat 5 is connected to the external pipeline through the connecting flanges 9 at both ends. Generally speaking, the valve seat 5 can be supported by the pipeline. If necessary, the position of the valve seat 5 can also be locked and fixed separately. The contact surface between the valve seat 5 and the valve cover 6 is sealed by the sealing ring 7; during normal operation, the flow rate, concentration, pressure and other parameters of the medium are monitored or actively regulated through the monitoring module 4 located inside the valve seat 5 and the valve cover 6.

[0069] When the monitoring module 4 needs to be maintained, the valve cover 6 needs to be disassembled. In the free state, the pre-unlocking floating ring 33 moves toward the handle 32 under the elastic force of the floating ring return spring 34. At this time, the operator pushes the pre-unlocking floating ring 33 away from the handle 32 with one hand until the unlocking pressure block 40 abuts against the sliding lock tongue 30 and presses the sliding lock tongue 30 down until it disengages from the locking slot 36. At this time, the pre-unlocking (or safety is released) is completed.

[0070] At the same time, the other hand rotates the handle 32 to rotate the valve cover 6 as a whole. At this time, the rotating buckle 28 also rotates in the fixed clamping seat 27, and gradually reduces the squeezing force of the valve seat 5 and the valve cover 6 on the sealing ring 7. When the rotating buckle 28 is detached from the fixed clamping seat 27, the valve cover 6 can be taken out vertically. At this time, the monitoring module 4 located in the valve seat 5 has a larger maintenance space, and the monitoring module 4 located in the valve cover 6 can be further disassembled for maintenance.

[0071] As the valve cover 6 rotates, the lever 19 also rotates along with the inner ring 10. Therefore, through the linkage of the hinged support rod 18, the floating valve core 15 gradually approaches the fixed retaining ring 13 until the rubber ring 22 is completely in contact with the inner conical surface of the fixed retaining ring 13, thereby completing the automatic closing of the valve core assembly 11.

[0072] Under the pulling force of the closing return spring 14, the floating valve core 15 and the fixed retaining ring 13 have a tendency to approach and combine with each other, and the extrusion force and sealing performance of the two increase with the increase of the internal pressure of the pipeline, thereby achieving the technical purpose of ensuring the closing effect of the connecting pipe 8 regardless of the internal pressure of the pipeline.

[0073] When the valve cover 6 is rotated to a detachable angle, the hinged support rod 18 just fits against the inner wall of the valve seat 5, specifically the connection between the valve seat 5 and the connecting pipe 8. Since a magnetic sticker is provided at this position and the hinged support rod 18 can be attracted by the magnetic sticker, the hinged support rod 18 can maintain its position when the valve cover 6 is removed, thereby ensuring that the lever 19 can be inserted into the sliding hole 23 when the valve cover 6 is installed next time.

[0074] After the maintenance is completed, the steps for installing the valve cover 6 are the opposite of those for disassembly. First, the valve cover 6 is vertically close to the valve seat 5. Since the hinged support rod 18 is attracted by the magnetic sticker inside the valve seat 5, when the valve cover 6 is attached to the valve seat 5, the lever 19 is also inserted into the sliding hole 23. Then, the handle 32 is rotated. As the rotating clip 28 enters the fixed clip 27, the clip slope 35 and the clip slope 38 cooperate, and the sealing ring 7 is gradually compressed, and the sealing performance is gradually improved.

[0075] The sliding lock tongue 30 can automatically retract when entering the fixed clamping seat 27 through the cooperation of the lock tongue bevel angle 39 and the clamping seat bevel angle 37. When the rotating buckle 28 is rotated to the specified angle, the sliding lock tongue 30 also just reaches the locking groove 36. At this time, the sliding lock tongue 30 is extended under the elastic force of the lock tongue spring 31, completing the automatic locking of the valve cover 6.

[0076] When the valve cover 6 rotates in the opposite direction, the lever 19 also rotates along with the inner ring 10 , so the floating valve core 15 gradually moves away from the fixed retaining ring 13 through the support of the hinged support rod 18 , thereby completing the automatic opening of the valve core assembly 11 .

[0077] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0078] The present invention and its embodiments are described above. This description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by this and, without departing from the purpose of the present invention, designs structures and embodiments similar to this technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. An integrated natural gas valve that is easy to open and close and maintain, comprising a valve body assembly, wherein the valve body assembly comprises a valve seat and a valve cover, and is characterized in that: It also includes an automatic valve core mechanism and a tightening mechanism, the automatic valve core mechanism includes a valve core assembly and a strut assembly, the valve core assembly and the strut assembly are symmetrically arranged in the valve seat, the tightening mechanism includes a clamping assembly, an elastic locking assembly and a pre-unlocking assembly, the clamping assembly is annularly arranged on the valve seat and the valve cover, the elastic locking assembly is arranged on the clamping assembly, and the pre-unlocking assembly is arranged on the valve cover; The valve seat is symmetrically provided with a connecting pipe, the valve cover is provided with an internal ring, the valve core assembly includes a fixed retaining ring, a closing and returning spring and a floating valve core, the fixed retaining ring is fixedly connected to the connecting pipe, the floating valve core is engaged and slidably provided in the connecting pipe, and the closing and returning spring is provided between the fixed retaining ring and the floating valve core; The support rod assembly includes a hinged support rod and a lever, the lever is fixed to the inner ring, and the two ends of the hinged support rod are hinged to the lever and the floating valve core respectively. A magnetic sticker is provided on the inner wall of the connection between the valve seat and the connecting pipe, and the hinged support rod can be attracted by the magnetic sticker, so that when the valve cover is removed, the hinged support rod can maintain its position, thereby ensuring that the lever can be connected to the hinged support rod when the valve cover is installed next time; The strut assembly further includes a hinged joint and a hinged pin, wherein the hinged joint is fixedly connected to the floating valve core, the hinged pin is arranged in the hinged joint, one end of the hinged strut is rotatably arranged on the hinged pin, and the other end of the hinged strut is provided with a toggle sliding hole, and the toggle rod can slide and rotate in the toggle sliding hole; The clamping assembly includes a fixed clamping seat and a rotating clamping buckle, the fixed clamping seat is fixed to the valve seat, and the rotating clamping buckle is fixed to the valve cover. The fixed clamping seat and the rotating clamping buckle are respectively provided with a clamping seat slope portion and a clamping buckle slope portion that cooperate with each other. Through the cooperation of the clamping seat slope portion and the clamping buckle slope portion, the sealing performance of the connection between the valve seat and the valve cover can be improved by rotating the valve cover; The elastic locking assembly includes a spring base, a sliding lock tongue and a lock tongue spring, a locking slot is provided on the fixed base, the spring base is fixed to the side of the rotating buckle, the sliding lock tongue is slidably arranged on the rotating buckle, the lock tongue spring is arranged between the spring base and the sliding lock tongue, the top of the sliding lock tongue is provided with a lock tongue bevel, and the fixed base is provided with a base bevel that matches the lock tongue bevel; The pre-unlocking assembly includes a handle, a pre-unlocking floating ring and a floating ring return spring. The handle is fixed to the valve cover, the pre-unlocking floating ring is slidably arranged on the rotating buckle, the floating ring return spring is arranged between the handle and the pre-unlocking floating ring, and the bottom of the floating ring return spring is provided with an unlocking pressure block that matches the sliding lock tongue.

2. The integrated natural gas valve that is easy to open and close and maintain according to claim 1, characterized in that: A spring groove is provided on the fixed retaining ring, one end of the closing reset spring is provided in the spring groove, the outer ring of the floating valve core is provided with a hollow bracket, the other end of the spring groove is provided on the hollow bracket, and a rubber ring for sealing is provided at the part of the floating valve core that fits with the fixed retaining ring.

3. The integrated natural gas valve that is easy to open and close and maintain according to claim 1 is characterized in that: The valve seat and the valve cover also include a monitoring module, which is located inside the valve seat and the valve cover.

4. The integrated natural gas valve that is easy to open and close and maintain according to claim 1 is characterized in that: The valve body assembly further comprises a sealing ring. The connecting surfaces of the valve seat and the valve cover are both provided with a groove, and the sealing ring is arranged in the groove.

5. The integrated natural gas valve that is easy to open and close and maintain according to claim 1 is characterized in that: The end of the connecting pipe is provided with a connecting flange connected to an external pipeline.

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