Fast-response electric regulating valve structure for natural gas pressure regulating stations

Abstract

This utility model discloses a fast-response electric regulating valve structure for a natural gas pressure regulating station, including a valve body. Inside the valve body, a flow-limiting plate is installed, and a plug is slidably inserted into the flow-limiting plate. A sealing seat is connected to the top of the valve body, and a support frame is flanged to the upper surface of the sealing seat. An electric mechanism is installed on the top of the support frame, including a motor. An electronic control unit is located on one side of the motor, and a screw is mounted on the motor output shaft. Limit rods are located on both sides of the screw. A moving cavity is located on the lower surface of the top plate of the support frame, and a movable plate is slidably inserted into the moving cavity. The movable plate has threaded holes that engage with the screw threads. A connecting rod is located at the bottom of the movable plate. This utility model, by setting up an electric mechanism, uses a motor to directly drive the screw, thereby moving the movable plate and connecting rod, and controlling the raising and lowering of the plug, greatly shortens the regulation response time. The multiple sets of sealing rings significantly improve the valve's sealing performance and effectively prevent natural gas leakage.

Description

Technical Field

[0001] This utility model relates to the field of regulating valve technology, specifically to the structure of a fast-response electric regulating valve for a natural gas pressure regulating station. Background Technology

[0002] With the widespread use of natural gas energy, pressure regulating stations, as key nodes in the natural gas transmission system, are directly related to the efficiency of energy supply and the normal order of social production and life in terms of their operational stability and safety.

[0003] Traditional natural gas pressure regulating valves often suffer from response lag during actual operation. When the supply and demand of natural gas changes suddenly, requiring rapid adjustment of valve opening to stabilize pressure, the complex transmission structure between the electric actuator and valve core in traditional valves results in significant energy loss. This prevents the valve core from responding quickly enough to meet the demands of rapid regulation, potentially affecting the stability of natural gas transmission and even posing safety hazards in extreme cases. Therefore, it is urgent to design a fast-response electric regulating valve structure for natural gas pressure regulating stations to solve these problems. Utility Model Content

[0004] The purpose of this invention is to provide a fast-response electric regulating valve structure for natural gas pressure regulating stations to address the aforementioned shortcomings in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] The fast-response electric regulating valve structure for a natural gas pressure regulating station includes a valve body. A flow-limiting plate is installed inside the valve body, and a plug is slidably inserted into the flow-limiting plate. A sealing seat is connected to the top flange of the valve body, and the guide rod of the plug passes through the sealing seat. A support frame is connected to the upper flange of the sealing seat. An electric mechanism is installed on the top of the support frame. The electric mechanism includes a motor mounted on the upper surface of the top plate of the support frame, an electrical control unit on one side of the motor, a screw on the motor output shaft, and limiting rods welded to the lower surface of the top plate of the support frame on both sides of the screw. A moving cavity is provided on the lower surface of the top plate of the support frame, and a movable plate is slidably inserted into the moving cavity. The movable plate has threaded holes that thread into the screw. A connecting rod is provided at the bottom of the movable plate.

[0007] In a preferred embodiment of this utility model, a sealing gasket is provided on the bottom surface of the plug, the sealing gasket is fixed in the valve body, a plurality of holes are provided on the flow limiting plate, an air inlet and an air outlet are respectively provided on the valve body, a pressure gauge is provided on the outer wall of both the air inlet and the air outlet, a groove is provided on the top flange of the valve body, and a sealing ring is provided in the groove of the top flange of the valve body.

[0008] In a preferred embodiment of this utility model, a graphene sealing ring is provided in the insertion hole on the sealing seat, and two sealing rings are provided above and below the graphene sealing ring.

[0009] In a preferred embodiment of this utility model, a connecting block is provided at one end of the guide rod of the embolization, and the guide rod and the connecting rod of the embolization are connected and fixed through the connecting block. A pointer is provided on one side surface of the connecting block, and a scale is provided on the support rod of the support frame.

[0010] In a preferred embodiment of this utility model, a protective cover is provided around the motor, and the protective cover is fixed to the top plate of the support frame by bolts.

[0011] In a preferred embodiment of this invention, the pressure gauge is connected to the electronic control unit via a wire.

[0012] In a preferred embodiment of this utility model, the limiting rod is inserted into the movable plate, the bottom of the movable plate is provided with an insertion cavity, and the screw is disposed in the insertion cavity.

[0013] In the above technical solution, the fast-response electric regulating valve structure for natural gas pressure regulating stations provided by this utility model has the following advantages:

[0014] (1) By setting up an electric mechanism, the motor directly drives the screw to drive the movable plate and connecting rod to move, thereby controlling the lifting and lowering of the thrombus, which greatly shortens the adjustment response time.

[0015] (2) By setting multiple sets of sealing rings, a sealing gasket is set at the bottom of the plug to ensure that the valve will not leak after it is closed. A sealing ring is set at the connection between the valve body and the sealing seat. A sealing structure combining graphene sealing rings and ordinary sealing rings is used in the insertion hole of the sealing seat. This significantly improves the sealing performance of the valve and effectively prevents natural gas leakage.

[0016] (3) By setting up a dial and pointer, the pointer, together with the dial on the support frame, can intuitively display the valve opening, which is convenient for operators to control and monitor accurately, further improving the operational reliability and safety of the pressure regulating station. By setting up a flow limiting plate, the control of natural gas flow can be further improved. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1This is a three-dimensional view of the valve body structure provided for an embodiment of the fast-response electric regulating valve for a natural gas pressure regulating station according to this utility model.

[0019] Figure 2 This is a cross-sectional view of the valve body structure provided for an embodiment of the fast-response electric regulating valve for a natural gas pressure regulating station according to this utility model.

[0020] Figure 3 This is an exploded view of the electric mechanism structure provided for an embodiment of the fast-response electric regulating valve structure of the natural gas pressure regulating station of this utility model.

[0021] Figure 4 This invention provides an embodiment of the fast-response electric regulating valve structure for a natural gas pressure regulating station. Figure 2 Enlarged view of a portion of the structure.

[0022] Figure 5 This invention provides an embodiment of the fast-response electric regulating valve structure for a natural gas pressure regulating station. Figure 2 Enlarged view of a portion of the structure.

[0023] 1. Valve body; 2. Sealing seat; 3. Support frame; 4. Electric mechanism; 41. Protective cover; 42. Electrical control unit; 43. Motor; 44. Screw; 45. Limiting rod; 46. Movable plate; 47. Connecting rod; 48. Threaded hole; 49. Moving chamber; 5. Connecting block; 51. Pointer; 6. Dial; 7. Air inlet; 8. Air outlet; 9. Pressure gauge; 10. Plug; 11. Flow limiting plate; 12. Sealing gasket; 13. Sealing ring one; 14. Sealing ring two; 15. Graphene sealing ring. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0025] like Figure 1-5 As shown in the embodiment of this utility model, the fast-response electric regulating valve structure for a natural gas pressure regulating station includes a valve body 1. A flow limiting plate 11 is provided inside the valve body 1. A plug 10 is slidably inserted inside the flow limiting plate 11. A sealing seat 2 is connected to the top flange of the valve body 1. The guide rod of the plug 10 passes through the sealing seat 2. A support frame 3 is connected to the upper flange of the sealing seat 2. An electric mechanism 4 is provided on the top of the support frame 3. The electric mechanism 4 includes a motor 43 provided on the upper surface of the top plate of the support frame 3. An electric control unit 42 is provided on one side of the motor 43. A screw 44 is provided on the output shaft of the motor 43. Limiting rods 45 welded to the lower surface of the top plate of the support frame 3 are provided on both sides of the screw 44. A moving cavity 49 is provided on the lower surface of the top plate of the support frame 3. A movable plate 46 is slidably inserted inside the moving cavity 49. A threaded hole 48 is provided on the movable plate 46. The threaded hole 48 is threadedly engaged with the screw 44. A connecting rod 47 is provided at the bottom of the movable plate 46.

[0026] In this embodiment, the valve body 1 is made of high-strength ductile iron. A flow limiting plate 11 is installed inside the valve body 1. The flow limiting plate 11 and the valve body 1 are integrally formed and are made of wear-resistant alloy steel. A plug 10 is slidably inserted inside the flow limiting plate 11. The plug 10 is made of 304 stainless steel and the surface is polished to further reduce friction loss during sliding. A sealing seat 2 is connected to the top flange of the valve body 1. The sealing seat 2 is made of forged steel. The flange connection between the top of the valve body 1 and the sealing seat 2 adopts a tenon and groove sealing structure. The guide rod of the plug 10 passes through the sealing seat 2. A support frame 3 is connected to the flange on the upper surface of the sealing seat 2. The support frame 3 is welded from rectangular steel pipe.

[0027] Specifically, an electric mechanism 4 is installed on the top of the support frame 3. The electric mechanism 4 includes a motor 43 mounted on the upper surface of the top plate of the support frame 3. The motor 43 is a servo motor, which can precisely control the rotation angle of the screw 44, thereby achieving precise displacement of the plug 10. An electronic control unit 42 is installed on one side of the motor 43. The electronic control unit 42 adopts a PLC control system. The screw 44 is mounted on the output shaft of the motor 43. The output shaft of the motor 43 and the screw 44 are rigidly connected by a coupling. The coupling adopts a flexible pin structure. It can effectively buffer the impact load when the motor 43 starts and brakes. Limiting rods 45 are welded to the lower surface of the top plate of the support frame 3 on both sides of the screw 44. A moving cavity 49 is provided on the lower surface of the top plate of the support frame 3. A movable plate 46 is slidably inserted into the moving cavity 49. A threaded hole 48 is provided on the movable plate 46. The threaded hole 48 is threaded with the screw 44. Under the guidance of the limiting rods 45, the rotational motion of the motor 43 is efficiently converted into the linear motion of the movable plate 46. A connecting rod 47 is provided at the bottom of the movable plate 46.

[0028] In this embodiment, a sealing gasket 12 is provided on the bottom surface of the plug 10. The sealing gasket 12 is fixed inside the valve body 1. When the plug 10 is in the closed state, it can effectively prevent natural gas from leaking from the gap between the plug 10 and the flow limiting plate 11. The flow limiting plate 11 has several holes, which are evenly distributed in a ring. The sliding of the plug 10 in the flow limiting plate 11 can control the flow area of ​​these holes. This design makes the flow regulation more intuitive and precise, and can quickly respond to different pressure regulation needs. The valve body 1 is provided with an air inlet 7 and an air outlet 8. Pressure gauges 9 are provided on the outer walls of both the air inlet 7 and the air outlet 8. The pressure gauges 9 are high-precision digital pressure gauges. A groove is provided on the top flange of the valve body 1. A sealing ring 13 is provided in the groove of the top flange of the valve body 1, which strengthens the seal between the valve body 1 and the sealing seat 2 and prevents natural gas from leaking out from the connection.

[0029] In this embodiment, a graphene sealing ring 15 is provided in the insertion hole on the sealing seat 2, and sealing rings 14 are provided above and below the graphene sealing ring 15. The sealing rings 14 are made of nitrile rubber and form a multi-layer seal with the graphene sealing ring 15, which significantly improves the overall sealing effect of the sealing seat 2. It provides strict protection for the leakage point at the guide rod penetration of the plug 10. The graphene sealing ring 15 is a graphene coated sealing ring with excellent high temperature resistance, self-lubrication, high pressure resistance and wear resistance. When used in conjunction with the sealing rings 14, it greatly improves the reliability and durability of the seal and meets the sealing requirements in the high pressure transmission environment of natural gas.

[0030] In this embodiment, a connecting block 5 is provided at one end of the guide rod of the plug 10. The guide rod of the plug 10 and the connecting rod 47 are connected and fixed through the connecting block 5. A pointer 51 is provided on one side surface of the connecting block 5. A scale 6 is provided on the support rod of the support frame 3. The pointer 51 cooperates with the scale 6 on the support rod of the support frame 3 to provide the operator with an intuitive reference for the valve opening.

[0031] In this embodiment, a protective cover 41 is provided around the motor 43. The protective cover 41 is fixed to the top plate of the support frame 3 by bolts. The protective cover 41 is made of aluminum alloy and the surface is anodized to ensure the stable operation of the electric mechanism 4.

[0032] In this embodiment, the pressure gauge 9 is connected to the electronic control unit 42 via a wire, enabling the electronic control unit 42 to acquire inlet and outlet pressure information in real time, and then automatically issue control commands to realize the automatic adjustment of the valve.

[0033] In this embodiment, the limiting rod 45 is inserted into the movable plate 46, and the bottom of the movable plate 46 is provided with an insertion cavity to provide working space for the screw 44, which is disposed in the insertion cavity.

[0034] Working steps: 1. After the valve body 1 is installed, when it is necessary to regulate the pressure of natural gas, the electronic control unit 42 receives external control signals or issues corresponding control commands to the motor 43 based on the pressure data fed back by the pressure gauges 9 at the inlet 7 and outlet 8.

[0035] 2. After receiving the instruction from the electronic control unit 42, the motor 43 starts and its output shaft drives the screw 44 to rotate. Since the threaded hole 48 on the movable plate 46 is threadedly engaged with the screw 44, and the limit rods 45 on both sides are inserted into the movable plate 46 to play a limiting and guiding role, the rotation of the screw 44 will be converted into the up and down linear motion of the movable plate 46.

[0036] Third, when the movable plate 46 moves up and down, it drives the connecting block 5 to move through the connecting rod 47 at the bottom, which in turn causes the guide rod of the plug 10 to move accordingly, so that the plug 10 slides in the flow-limiting plate 11 inside the valve body 1. When the plug 10 moves downward, it will gradually approach the sealing gasket 12, reducing the flow area of ​​the cavity on the flow-limiting plate 11. When the plug 10 moves upward, it will move away from the sealing gasket 12, increasing the flow area, thereby regulating the flow rate and pressure of natural gas.

[0037] Fourth, during the movement and operation of the plug 10, the sealing gasket 12 at the bottom of the plug 10 ensures the seal between the plug 10 and the inside of the valve body 1. The sealing ring 13 in the flange groove at the top of the valve body 1 enhances the sealing between the valve body 1 and the sealing seat 2. The graphene sealing ring 15 in the insertion hole of the sealing seat 2 and the sealing rings 14 above and below it ensure the seal at the through point of the plug 10 guide rod, effectively preventing natural gas leakage.

[0038] 5. When the pressure displayed by pressure gauge 9 reaches the required value, or when the electronic control unit 42 receives a stop signal, the electronic control unit 42 controls the motor 43 to stop working, the screw 44 stops rotating, and the movable plate 46 and the plug 10 remain in their current positions, thus completing the adjustment process.

[0039] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A structure of electric regulating valve for fast response of natural gas pressure regulating station, comprising a valve body (1), characterized in that, The valve body (1) is equipped with a flow limiting plate (11) inside, and a plug (10) is slidably inserted inside the flow limiting plate (11). A sealing seat (2) is connected to the top flange of the valve body (1). The guide rod of the plug (10) passes through the sealing seat (2). A support frame (3) is connected to the upper flange of the sealing seat (2). An electric mechanism (4) is provided on the top of the support frame (3). The electric mechanism (4) includes a motor (43) provided on the upper surface of the top plate of the support frame (3). An electric motor (43) is provided on one side of the motor (43). The control unit (42) has a screw (44) on the output shaft of the motor (43). Limiting rods (45) welded to the lower surface of the top plate of the support frame (3) are provided on both sides of the screw (44). A motion cavity (49) is provided on the lower surface of the top plate of the support frame (3). A movable plate (46) is slidably inserted into the motion cavity (49). A threaded hole (48) is provided on the movable plate (46). The threaded hole (48) is threadedly engaged with the screw (44). A connecting rod (47) is provided at the bottom of the movable plate (46).

2. The fast responding electric regulating valve structure for natural gas pressure regulating station according to claim 1, characterized in that, A sealing gasket (12) is provided on the bottom surface of the plug (10). The sealing gasket (12) is fixed inside the valve body (1). Several holes are opened on the flow limiting plate (11). An air inlet (7) and an air outlet (8) are respectively provided on the valve body (1). Pressure gauges (9) are provided on the outer walls of the air inlet (7) and the air outlet (8). A groove is opened on the top flange of the valve body (1). A sealing ring (13) is provided in the groove on the top of the valve body (1).

3. The fast responding electric regulating valve structure for natural gas pressure regulating station according to claim 1, characterized in that, A graphene sealing ring (15) is provided in the insertion hole on the sealing seat (2), and sealing rings (14) are provided above and below the graphene sealing ring (15).

4. The fast responding electric regulating valve structure for natural gas pressure regulating station according to claim 1, characterized in that, A connecting block (5) is provided at one end of the guide rod of the plug (10). The guide rod of the plug (10) and the connecting rod (47) are connected and fixed through the connecting block (5). A pointer (51) is provided on one side surface of the connecting block (5). A dial (6) is provided on the support rod of the support frame (3).

5. The fast responding electric regulating valve structure for natural gas pressure regulating station according to claim 1, characterized in that, A protective cover (41) is provided around the motor (43), and the protective cover (41) is fixed to the top plate of the support frame (3) by bolts.

6. The fast responding electric regulating valve structure for natural gas pressure regulating station according to claim 2, characterized in that, The pressure gauge (9) is connected to the electronic control unit (42) via a wire.

7. The fast responding electric regulating valve structure for natural gas pressure regulating station according to claim 1, characterized in that, The limiting rod (45) is inserted into the movable plate (46), and the bottom of the movable plate (46) is provided with an insertion cavity, and the screw (44) is disposed in the insertion cavity.

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