A gas pressure reducing valve balancing module

Abstract

The present invention relates to a gas pressure reducing valve balancing module, comprising a balancer housing and a balancing membrane, wherein the bottom of the balancer housing penetrates and is slidably connected to a balancing body, the upper end face of the balancing body is fixedly connected to a convex rod, the lower end of the balancing body is threadedly connected to a main regulating valve, the outer ring edge of the balancing membrane overlaps the stepped surface inside the balancer housing and is pressed by the balancer inner shell, the inner ring edge of the balancing membrane overlaps the stepped surface formed by the convex rod and the balancing body and is fixed to the balancing body by an upper pressure pad; a channel 1 that passes through from top to bottom is provided at the center of the main regulating valve, a channel 2 is provided at the center of the balancing body, a side hole is provided on the side wall of the convex rod located above the balancing membrane, the upper end of the channel 2 is connected to the side hole, and the lower end is connected to the channel 1. This gas pressure reducing valve balancing module allows the airflow on the inlet side of the pipeline to enter the cavity on the upper side of the balancing membrane, thereby balancing the force of the inlet pressure on the main regulating valve, so that the main regulator can adapt to a wider range of inlet pressure changes and the pressure regulation is more stable.

Description

Technical Field

[0001] The invention relates to the field of pressure reducing valves, in particular to a gas pressure reducing valve balancing module. Background Art

[0002] Gas pressure reducing valves are widely used for pressure adjustment and pressure stabilization in residential buildings, public service users, small hot water boilers and other gas users. They are suitable for media such as natural gas, artificial coal gas, liquefied petroleum gas and other non-corrosive gases.

[0003] In the process of regulating and stabilizing the gas pressure, the main regulator of the existing gas pressure reducing valve is affected by the inlet pressure fluctuation, thereby reducing the stability and reliability of the pressure regulation and stabilization. In view of this, we propose a gas pressure reducing valve balancing module. Summary of the invention

[0004] The object of the present invention is to provide a gas pressure reducing valve balancing module to solve the problems raised in the above background technology. To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a gas pressure reducing valve balancing module, comprising a balancer housing fixed on the side wall of a pipeline, a valve port fixed inside the pipeline, and a balancing membrane, and the balancing membrane is an annular structure, the balancer housing is a stepped groove structure, and the balancer housing is connected to the signal tube 2, the bottom of the balancer housing penetrates and is slidably connected to the balancing body, the center of the upper end surface of the balancing body is integrally fixedly connected to a convex rod, and the connection between the convex rod and the balancing body is a stepped surface, the lower end of the balancing body is threadedly connected to a main regulating valve, the bottom surface of the main regulating valve is embedded with a ring seal, and the ring seal is used to seal the upper end of the valve port, the outer ring edge of the balancing membrane overlaps the stepped surface on the inner side of the balancer housing and is pressed by the balancer inner shell, and the balancer inner shell is fixed to the inner side of the balancer housing by the inner shell pressure cover, the convex rod penetrates and is slidably connected to the center of the balancer inner shell, the upper end of the convex rod is threadedly connected to the lower end of the connecting rod 1, the inner ring edge of the balancing membrane overlaps the stepped surface formed by the convex rod and the balancing body and is fixed to the balancing body through an upper pressure pad;

[0005] A vertically penetrating channel 1 is provided at the center of the main regulating valve, a vertically penetrating channel 2 is provided at the center of the balancing body, a side hole is provided on the side wall of the convex rod above the balancing membrane, and the upper end of channel 2 is connected to the side hole, and the lower end is connected to channel 1.

[0006] Preferably, the balancing body and the protruding rod are arranged in a vertical direction.

[0007] Preferably, an O-ring is embedded on the stepped surface formed by the protruding rod and the balancing body, and an O-ring is embedded on the bottom surface of the balancing body.

[0008] Preferably, the side wall of the pipeline is fixed to and connected to the main regulator, and a membrane is fixed inside the main regulator, a connecting rod 2 is fixed at the center of the membrane, the upper end of the connecting rod 2 is connected to the top of the main regulator through a spring, the lower end of the connecting rod 2 is hinged to one end of a lever, the other end of the lever is hinged to the upper end of the connecting rod 1, and the middle part of the lever is arranged at the inner bottom of the main regulator.

[0009] Preferably, a pump barrel is fixed to the inner bottom surface of the balancer housing, and the pump barrel is located below the balancing membrane.

[0010] Preferably, a piston plate is slidably connected in the pump barrel, a push-pull rod is fixed on the piston plate, and the push-pull rod passes through and is slidably connected to the upper end wall of the pump barrel, and the upper end of the push-pull rod is fixedly connected to the balance membrane through a connecting plate, and the pump barrel is filled with inert gas.

[0011] Preferably, an air channel 1 is opened inside the balancing body, an air channel 2 is opened inside the main regulating valve, the upper end of the air channel 1 is connected to the bottom of the pump barrel through a conduit, and the lower end of the air channel 1 is connected to the upper end of the air channel 2.

[0012] Preferably, a groove matching the valve port is formed on the bottom surface of the ring seal, and an annular groove is formed on the inner side wall of the groove, and a rubber sealing ring is fixed at the opening of the annular groove facing the inside of the groove.

[0013] Preferably, an air channel three is provided in the ring seal, and the air channel three is respectively connected with the air channel two and the ring groove.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] In the present invention, by arranging a balancing module in the gas pressure reducing valve, when the upper end of the valve port of the main regulating valve is closed, the airflow on the inlet side of the pipeline can enter the cavity on the upper side of the balancing membrane, thereby balancing the force of the inlet pressure on the main regulating valve, so that the main regulator can adapt to a wider range of inlet pressure changes and the pressure regulation is more stable. In addition, through modular design, the versatility is enhanced and it can be used for the transformation of products without balancing devices. The entire balancing module has a simple structure and is easy to install and maintain, which greatly improves the operating performance of the gas pressure reducing valve and has the advantages of good effect and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the cross-sectional structure of the present invention when installed in a pipeline;

[0017] Figure 2 The schematic diagram of the cross-sectional structure of the general assembly of the present invention is shown in FIG. Figure 1 ;

[0018] Figure 3 It is a schematic diagram of the structure of the open state of the present invention;

[0019] Figure 4 The schematic diagram of the cross-sectional structure of the general assembly of the present invention is shown in FIG. Figure 2 ;

[0020] Figure 5 for Figure 4 Enlarged structural diagram at A in the middle.

[0021] In the figure: 1. balancer outer shell; 2. balancer inner shell; 3. inner shell gland; 4. connecting rod 1; 5. convex rod; 6. side hole; 7. upper pressure pad; 8. balance membrane; 9. balance body; 10. main regulating valve; 11. ring seal; 12. channel 1; 13. channel 2; 14. valve port; 15. connecting piece; 16. push-pull rod; 17. piston plate; 18. pump barrel; 19. conduit; 20. air channel 1; 21. air channel 2; 22. air channel 3; 23. ring groove; 24. rubber sealing ring; 25. pipeline; 26. inlet side ball valve; 27. pressure gauge; 28. outlet side ball valve; 29. ​​cut-off valve; 30. cut-off valve; 31. signal tube 1; 32. signal tube 2; 33. main regulator; 34. membrane; 35. spring; 36. connecting rod 2; 37. lever. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technical personnel in this field without creative work are within the scope of protection of the present invention.

[0023] Example 1

[0024] See also Figure 1 , Figure 2 and Figure 3 The present invention provides a technical solution: a gas pressure reducing valve balancing module, comprising a balancer housing 1 fixed on the side wall of a pipeline 25, a valve port 14 fixed inside the pipeline 25, and a balance membrane 8, and the balance membrane 8 is a ring structure, the balancer housing 1 is a stepped groove structure, and the balancer housing 1 is connected to the signal tube 2 32, the bottom of the balancer housing 1 penetrates and slides to connect the balance body 9, the center of the upper end face of the balance body 9 is integrally fixedly connected to the convex rod 5, and the connection between the convex rod 5 and the balance body 9 is a stepped surface, and the lower end of the balance body 9 is threadedly connected to the main adjustment movable Valve 10, the bottom surface of the main regulating valve 10 is embedded with a ring seal 11, and the ring seal 11 is used to seal the upper end of the valve port 14, the outer ring edge of the balancing membrane 8 overlaps the stepped surface on the inner side of the balancer outer shell 1 and is pressed by the balancer inner shell 2, and the balancer inner shell 2 is fixed to the inner side of the balancer outer shell 1 through the inner shell gland 3, the convex rod 5 penetrates and is slidably connected to the center of the balancer inner shell 2, the upper end of the convex rod 5 is threadedly connected to the lower end of the connecting rod 4, the inner ring edge of the balancing membrane 8 overlaps the stepped surface formed by the convex rod 5 and the balancing body 9 and is fixed to the balancing body 9 through the upper pressure pad 7;

[0025] A vertically penetrating channel 12 is provided at the center of the main regulating valve 10, a second channel 13 is provided at the center of the balancing body 9, a side hole 6 is provided on the side wall of the protruding rod 5 above the balancing membrane 8, and the upper end of the second channel 13 is connected to the side hole 6, and the lower end is connected to the first channel 12.

[0026] In this embodiment, the balancing body 9 and the protruding rod 5 are arranged in a vertical direction, and an O-ring is embedded in the step surface formed by the protruding rod 5 and the balancing body 9 to maintain the sealing between the bottom surface of the balancing membrane 8 and the step surface. An O-ring is embedded in the bottom surface of the balancing body 9 to maintain the sealing between the bottom surface of the balancing body 9 and the main regulating valve 10.

[0027] In this embodiment, the side wall of the pipe 25 is fixed to and connected to the main regulator 33, and a membrane 34 is fixed inside the main regulator 33, and a connecting rod 36 is fixed at the center of the membrane 34. The upper end of the connecting rod 36 is connected to the top of the main regulator 33 through a spring 35, and the lower end of the connecting rod 36 is hinged to one end of a lever 37, and the other end of the lever 37 is hinged to the upper end of the connecting rod 1 4, and the middle part of the lever 37 is set at the inner bottom of the main regulator 33.

[0028] Working principle and advantages of the present invention: When the gas pressure reducing valve balancing module is in use, the working process is as follows: at the beginning, the main regulating valve 10 is in an open state, that is, the valve port 14 is not blocked, and the gas enters the interior of the pipeline 25 through the inlet side ball valve 26 at the left end of the pipeline 25, and comes to the outlet side of the pipeline 25 through the valve port 14, and then enters the lower cavity of the membrane 34 inside the main regulator 33 through the internal signal tube 2 32, giving the membrane 34 an upward force, so that the membrane 34 drives the right end of the lever 37 to move upward through the connecting rod 2 36, so that the left end of the lever 37 applies downward pressure to the connecting rod 1 4, and then the connecting rod 1 4 drives the balancing body 9 and the main regulating valve 10 to block the upper end of the valve port 14 through the convex rod 5. Close the valve port 14. At this time, the pressure on the outlet side is the closing pressure (static pressure). When the user starts to use gas, the outlet side ball valve 28 at the right end of the pipeline 25 is opened, so that the pressure on the outlet side drops, and the pressure in the lower cavity of the diaphragm 34 inside the main regulator 33 drops accordingly. Under the action of the spring 35 and the atmospheric pressure, the diaphragm 34 moves downward, so that the diaphragm 34 drives the right end of the lever 37 to move downward through the connecting rod 2 36, so that the left end of the lever 37 applies an upward pulling force to the connecting rod 1 4, and then the connecting rod 1 4 drives the balance body 9 and the main regulating valve 10 to move upward and away from the valve port 14 through the convex rod 5, so that the valve port 14 opens to supply gas to the downstream. As the gas consumption increases, the opening of the valve port 14 increases to meet the excess gas volume and gas pressure. On the contrary, when the gas consumption of the user decreases, the pressure on the outlet side increases, and the membrane 34 drives the right end of the lever 37 to move upward through the connecting rod 2 36, so that the left end of the lever 37 applies downward pressure to the connecting rod 1 4, and then the connecting rod 1 4 drives the balance body 9 and the main regulating valve 10 to move downward through the convex rod 5, so that the main regulating valve 10 gradually closes the valve port 14. When the flow rate is zero, the main regulating valve 10 closes the valve port 14.

[0029] When the main regulating valve 10 closes the upper end of the valve port 14, the airflow on the inlet side of the pipeline 25 enters the cavity on the upper side of the balancing membrane 8 through the valve port 14, channel 1 12, channel 2 13 and side hole 6, thereby increasing the cavity pressure on the upper side of the balancing membrane 8, so that the upper surface of the balancing membrane 8 is subjected to downward pressure, which is equal to the upward pressure exerted by the airflow in the valve port 14 on the bottom surface of the main regulating valve 10, thereby balancing the force of the inlet pressure on the main regulating valve 10, so that the main regulator 33 can adapt to a wider range of inlet pressure changes and the pressure regulation is more stable. In addition, through modular design, the general (applicability) is enhanced, and it can be used for the transformation of products without balancing devices. The entire balancing module has a simple structure and is easy to install and maintain, which greatly improves the operating performance of the gas pressure reducing valve and has the advantages of good effect and low cost.

[0030] A shut-off valve 29 cooperating with the main regulator is also provided on the pipeline 25. The pressure on the outlet side of the pipeline 25 acts on the shut-off diaphragm inside the shut-off valve 29 (the diaphragm is connected to the lock) through the signal tube 31 and is acted upon by the shut-off spring. When the pressure on the outlet side of the pipeline 25 rises to the shut-off set value due to a fault, the shut-off diaphragm drives the ball lock sleeve to move, allowing the ball lock device to release the valve stem, so that the shut-off live valve 30 at the upper end of the valve stem moves under the action of the spring to close the lower end of the valve port 14 and cut off the airflow. After the fault is eliminated, the shut-off protective cover is screwed upside down on the valve stem and pulled outward to move the shut-off live valve 30 away from the valve port 14, thereby manually resetting it.

[0031] Example 2

[0032] See also Figure 1 , Figure 4 and Figure 5 This embodiment is realized on the basis of the embodiment 1. A pump barrel 18 is fixed to the inner bottom surface of the balancer housing 1, and the pump barrel 18 is located below the balance membrane 8. A piston plate 17 is slidably connected in the pump barrel 18. A push-pull rod 16 is fixed on the piston plate 17. The push-pull rod 16 penetrates and is slidably connected to the upper end wall of the pump barrel 18. The upper end of the push-pull rod 16 is fixedly connected to the balance membrane 8 through a connecting piece 15. The pump barrel 18 is filled with an inert gas. An air passage 2 is provided inside the balance body 9. 0, an air passage 21 is provided in the main regulating valve 10, the upper end of the air passage 1 20 is connected with the bottom of the pump barrel 18 through the conduit 19, the lower end of the air passage 1 20 is connected with the upper end of the air passage 2 21, a groove matching the valve port 14 is provided on the bottom surface of the ring seal 11, and an annular groove 23 is provided on the inner side wall of the groove, a rubber sealing ring 24 is fixed at the opening of the annular groove 23 facing the inside of the groove, an air passage 3 22 is provided in the ring seal 11, and the air passage 3 22 is connected with the air passage 2 21 and the annular groove 23 respectively.

[0033] The working principle and advantages of this embodiment are as follows: As shown in Embodiment 1, in the process of the main regulating valve 10 moving downward to close the valve port 14, the groove on the bottom surface of the ring seal 11 is correspondingly sleeved on the upper end of the valve port 14, and the balancing membrane 8 is subjected to downward pressure and drives the piston plate 17 to move downward through the connecting piece 15 and the push-pull rod 16, so that the piston plate 17 sequentially transports the inert gas in the pump barrel 18 to the ring groove 23 through the conduit 19, the air channel 1 20, the air channel 2 21 and the air channel 3 22, so that the air pressure in the ring groove 23 increases and the rubber seal ring 24 expands to increase the tightness between the rubber seal ring 24 and the side wall of the valve port 14, thereby increasing the pressure on the valve. The sealing performance of the valve port 14 after closing is improved. When the valve port 14 is opened, the connecting rod 14 drives the balancing body 9 and the main regulating valve 10 to move upward through the convex rod 5, so that the balancing body 9 drives the balancing membrane 8 to move upward, and the balancing membrane 8 drives the piston plate 17 to move upward through the connecting piece 15 and the push-pull rod 16, so that the pump barrel 18 sucks the inert gas in the annular groove 23 into the pump barrel 18 through the conduit 19, the airway 1 20, the airway 21 and the airway 3 22 in sequence, so that the air pressure in the annular groove 23 is reduced, thereby reducing the fitting force between the rubber sealing ring 24 and the side wall of the valve port 14, so that the main regulating valve 10 can be smoothly separated from the valve port 14.

[0034] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0035] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and 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 orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A gas pressure reducing valve balancing module, comprising a balancer housing (1) fixed on the side wall of a pipeline (25), wherein a valve port (14) is fixed inside the pipeline (25), characterized in that: The device also includes a balancing membrane (8), and the balancing membrane (8) is an annular structure. The balancer housing (1) is a stepped groove structure, and the balancer housing (1) is connected to the signal tube 2 (32). The bottom of the balancer housing (1) penetrates and is slidably connected to a balancing body (9). The center of the upper end surface of the balancing body (9) is integrally fixedly connected to a protruding rod (5), and the connection between the protruding rod (5) and the balancing body (9) is a stepped surface. The lower end of the balancing body (9) is threadedly connected to a main regulating valve (10), and the bottom surface of the main regulating valve (10) is embedded with a ring seal (11), and the ring seal (11) is used to adjust the balance body (9). The upper end of the valve port (14) is blocked, the outer ring edge of the balancing membrane (8) overlaps the stepped surface on the inner side of the balancer outer shell (1) and is pressed by the balancer inner shell (2), and the balancer inner shell (2) is fixed to the inner side of the balancer outer shell (1) by the inner shell pressure cover (3), the protruding rod (5) penetrates and is slidably connected to the center of the balancer inner shell (2), the upper end of the protruding rod (5) is threadedly connected to the lower end of the connecting rod (4), the inner ring edge of the balancing membrane (8) overlaps the stepped surface formed by the protruding rod (5) and the balancing body (9) and is fixed to the balancing body (9) by the upper pressure pad (7); A vertically penetrating hole 1 (12) is provided at the center of the main regulating valve (10), a second hole 13 is provided at the center of the balancing body (9), a side hole (6) is provided on the side wall of the protruding rod (5) located above the balancing membrane (8), and the upper end of the second hole 13 is connected to the side hole (6), and the lower end is connected to the first hole 12; The side wall of the pipe (25) is fixed to and connected to the main regulator (33), and a membrane (34) is fixed inside the main regulator (33). A second connecting rod (36) is fixed at the center of the membrane (34). The upper end of the second connecting rod (36) is connected to the top of the main regulator (33) through a spring (35). The lower end of the second connecting rod (36) is hinged to one end of a lever (37). The other end of the lever (37) is hinged to the upper end of the first connecting rod (4). The middle part of the lever (37) is arranged at the inner bottom of the main regulator (33). A pump barrel (18) is fixed to the inner bottom surface of the balancer housing (1), and the pump barrel (18) is located below the balance membrane (8). A piston plate (17) is slidably connected to the pump barrel (18), and a push-pull rod (16) is fixed to the piston plate (17). The push-pull rod (16) passes through and is slidably connected to the upper end wall of the pump barrel (18), and the upper end of the push-pull rod (16) is fixedly connected to the balance membrane (8) through a connecting piece (15). The pump barrel (18) is filled with inert gas, and an air passage (20) is provided inside the balance body (9). The main regulating valve (10) is provided with a gas passage (20). An air passage (21) is provided, the upper end of the air passage (20) is connected to the bottom of the pump barrel (18) through a conduit (19), the lower end of the air passage (20) is connected to the upper end of the air passage (21), the bottom surface of the ring seal (11) is provided with a groove matched with the valve port (14), and an annular groove (23) is provided on the inner side wall of the groove, a rubber sealing ring (24) is fixed to the opening of the annular groove (23) facing the inside of the groove, and an air passage (22) is provided in the ring seal (11), and the air passage (22) is respectively connected to the air passage (21) and the annular groove (23).

2. A gas pressure reducing valve balancing module according to claim 1, characterized in that: The balancing body (9) and the protruding rod (5) are arranged in a vertical direction.

3. A gas pressure reducing valve balancing module according to claim 2, characterized in that: An O-ring is embedded on the stepped surface formed by the convex rod (5) and the balancing body (9), and an O-ring is embedded on the bottom surface of the balancing body (9).

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