A micro-power precision valve device of a conical valve core

Abstract

The utility model discloses a kind of micro-power precision valve devices of conical surface valve core, including pilot valve body, atmospheric communication valve body, water injection valve body, the first end between the pilot valve body and atmospheric communication valve body is provided with pilot valve diaphragm, the second end between the water injection valve body and atmospheric communication valve body is provided with water injection valve diaphragm, pilot spring is provided between the pilot valve diaphragm and water injection valve diaphragm;The inside of the pilot valve body is provided with pilot elastic thimble assembly, one end of the pilot elastic thimble assembly is connected with pilot valve diaphragm and is in contact;The inside of the water injection valve body is provided with water injection elastic thimble assembly, one end of the water injection elastic thimble assembly is connected with water injection valve diaphragm and is in contact;The utility model can utilize the volume of sealed water in valve body inside by the pressure difference of diaphragm two sides automatic control, while diaphragm is driven thimble to move by independent adjustment under the action of pressure difference, and it can guarantee the pressure balance in valve body without setting additional external power component.

Description

Technical Field

[0001] This utility model belongs to the technical field of pilot valves, specifically relating to a micro-power precision valve device with a conical valve core. Background Technology

[0002] A pilot-operated pressure reducing valve is a hydraulic or pneumatic control element that controls the operation of the main valve through changes in the pressure of the pilot chamber. It is widely used in industrial automation, engineering machinery, and hydraulic support systems in coal mines. Its core advantage lies in using a small-flow pilot signal to regulate the large-flow output pressure of the main valve, thereby achieving precise control of the system pressure.

[0003] However, existing pilot-operated pressure reducing valves mostly rely on adjusting the spring pin or mechanical adjustment mechanism to change the spring deformation and set the pressure. Traditional pin-type pressure reducing valves require frequent manual operation of the spring pin when adjusting the pressure. Mechanically adjustable pressure reducing valves face two major challenges: firstly, the mechanical structure is prone to failure or malfunction due to long-term use; secondly, their adjustment power requirements are high, necessitating additional power equipment and limiting their engineering applications. Furthermore, mechanically adjustable pressure reducing valves suffer from insufficient adjustment accuracy, and the non-linear flow area of ​​the pilot valve core further reduces the accuracy of pressure regulation.

[0004] Therefore, in view of the above-mentioned defects of existing pilot valves, this utility model discloses a micro-power precision valve device with a conical valve core. Utility Model Content

[0005] This utility model discloses a micro-power precision valve device with a conical valve core, which can automatically control the volume of sealing water inside the valve body by utilizing the pressure difference on both sides of the diaphragm. At the same time, the diaphragm drives the pin to adjust and move autonomously under the action of the pressure difference, so that the pressure balance inside the valve body can be guaranteed without setting up additional external power components.

[0006] This utility model is achieved through the following technical solution:

[0007] A micro-powered precision valve device with a conical valve core includes a pilot valve body, an atmospheric communication valve body, and a water injection valve body. A pilot valve diaphragm is disposed between the first end of the pilot valve body and the atmospheric communication valve body, and a water injection valve diaphragm is disposed between the second end of the water injection valve body and the atmospheric communication valve body. A pilot spring is disposed between the pilot valve diaphragm and the water injection valve diaphragm. A pilot-missile elastic pin assembly is disposed inside the pilot valve body, and one end of the pilot-missile elastic pin assembly is in contact with the pilot valve diaphragm. A water injection elastic pin assembly includes a valve core capable of axial movement. A conical orifice is disposed inside the water injection valve body between the inlet pipe and the outlet pipe, and a conical surface is disposed on the valve core, which is connected to the conical orifice.

[0008] The pilot valve body and the water injection valve body are filled with liquid. The atmospheric connection valve body is connected to the external atmosphere. By controlling the liquid injection pressure inside the pilot valve body and the water injection valve body, a pressure difference is created on both sides of the pilot valve diaphragm. This pressure difference, generated by the liquid pressure from the pilot valve body and the air pressure from the atmospheric connection valve body acting on both sides of the pilot valve diaphragm, causes the pilot valve diaphragm to move. This, in turn, causes the pilot-operated elastic pin assembly to move, achieving autonomous control of the pilot-operated elastic pin assembly's movement. Simultaneously, the pilot-operated elastic pin assembly can return to its original position due to its own elasticity. Similarly, a pressure difference is created on both sides of the water injection valve diaphragm. This pressure difference, generated by the liquid pressure from the water injection valve body and the air pressure from the atmospheric connection valve body acting on both sides of the water injection valve diaphragm, causes the water injection valve diaphragm to move. This, in turn, causes the water injection valve diaphragm to move, achieving autonomous control of the water injection elastic pin assembly's movement. Simultaneously, the water injection elastic pin assembly can return to its original position due to its own elasticity. Ultimately, there is no need to set up an external power component to drive the movement of the missile-shaped ejector pin assembly and the water-injecting elastic ejector pin assembly; only the pressure on both sides of the diaphragm needs to be adjusted.

[0009] To better realize this utility model, the axial movement distance of the valve core further satisfies:

[0010] ;

[0011] in: L1 represents the axial movement distance of the valve core; L2 represents the diameter of the small-diameter end of the valve core's conical surface; h1 represents the axial length of the conical opening; α represents the inclination angle of the conical surface; k 2s This represents the equivalent coefficient of the flow area.

[0012] To better realize this utility model, the pilot-operated linear ejector assembly further includes an adjusting bolt and a pilot ejector pin. The pilot ejector pin is slidably disposed inside the pilot valve body. One end of the pilot ejector pin is in contact with the pilot valve diaphragm through a conical surface. The other end of the pilot ejector pin is provided with an adjusting bolt. The adjusting bolt is threadedly installed at one end of the pilot valve body. A sealing element is provided between the pilot ejector pin and the adjusting bolt.

[0013] To better realize this utility model, further, one end of the pilot valve body is provided with a pin connecting sleeve, a pilot pin is slidably provided inside the end of the pin connecting sleeve near the pilot valve diaphragm, and an adjusting bolt is provided inside the end of the pin connecting sleeve away from the pilot valve diaphragm with a threaded fit.

[0014] To better realize this utility model, a locking nut is screwed onto the outside of the adjusting bolt, and one end of the locking nut abuts against the end face of the ejector pin connecting sleeve.

[0015] To better realize this utility model, the water injection elastic pin assembly further includes a conical pin, a connector, an actuating spring, and a water injection valve cover. The water injection valve cover is located at the end of the water injection valve body away from the atmospheric communication valve body. The conical pin is slidably disposed inside the water injection valve cover, and an actuating spring is disposed between the conical pin and the water injection valve cover. A connector is disposed at the end of the conical pin near the atmospheric communication valve body, and one end of the connector is in contact with the diaphragm of the water injection valve.

[0016] To better realize this utility model, the water injection valve body further includes a water inlet pipe and a water outlet pipe, and the conical pin is disposed between the water inlet pipe and the water outlet pipe.

[0017] To better realize this utility model, further, an adjusting adapter is slidably provided inside the atmospheric communication valve body, a pilot valve diaphragm is provided at the first end of the adjusting adapter, and a pilot spring is provided at the second end of the adjusting adapter.

[0018] To better realize this utility model, further, the first end of the adjusting adapter is connected to a diaphragm fixing member by a fixing bolt, and a pilot valve diaphragm is provided between the diaphragm fixing member and the first end of the adjusting adapter. One end of the diaphragm fixing member abuts against the pilot-operated linear ejector assembly.

[0019] To better realize this utility model, a limiting washer is further provided at one end of the atmospheric communication valve body near the water injection valve body, and a flange that cooperates with the limiting washer is provided at one end of the water injection valve diaphragm.

[0020] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0021] This invention establishes a pilot valve diaphragm between the pilot valve body and the atmospheric valve body, and a water injection valve diaphragm between the water injection valve body and the atmospheric valve body. By controlling the liquid pressure inside the pilot valve body and the water injection valve body, a pressure difference is generated on both sides of the pilot valve diaphragm and the water injection valve diaphragm. This pressure difference drives the pilot valve diaphragm and the water injection valve diaphragm to move, which in turn drives the pilot elastic ejector assembly and the water injection elastic ejector assembly to move autonomously. This eliminates the need for additional power equipment to maintain the internal pressure balance of the valve body, effectively reducing the energy consumption of the valve assembly while improving its safety and reliability. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the exploded structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the external structure of this utility model;

[0024] Figure 3 for Figure 2 Sectional view along axis AA;

[0025] Figure 4 This is a schematic diagram showing the axial movement distance of the valve core.

[0026] Wherein: 1-Pilot valve body; 2-Atmospheric valve body; 3-Water injection valve body; 4-Pilot valve diaphragm; 5-Water injection valve diaphragm; 6-Pilot spring; 7-Pilot flexible ejector assembly; 8-Water injection elastic ejector assembly; 9-Adjusting adapter; 10-Conical surface; 11-Conical port; 21-Air port; 71-Adjusting bolt; 72-Pilot ejector pin; 73-Ejector pin connecting sleeve; 74-Locking nut; 75-Seal; 81-Conical ejector pin; 82-Connector; 83-Actuating spring; 84-Water injection valve cover; 91-Diaphragm fixing component; 92-Fixing bolt; 93-Limit washer. Detailed Implementation

[0027] Example 1:

[0028] This embodiment describes a micro-powered precision valve device with a conical valve core, such as... Figures 1-3As shown, the system includes a pilot valve body 1, an atmospheric communication valve body 2, and a water injection valve body 3. A pilot valve diaphragm 4 is disposed between the first end of the pilot valve body 1 and the atmospheric communication valve body 2, and a water injection valve diaphragm 5 is disposed between the second end of the water injection valve body 3 and the atmospheric communication valve body 2. A pilot spring 6 is disposed between the pilot valve diaphragm 4 and the water injection valve diaphragm 5. A pilot-guided elastic pin assembly 7 is disposed inside the pilot valve body 1, and one end of the pilot-guided elastic pin assembly 7 is in contact with the pilot valve diaphragm 4. A water injection elastic pin assembly 8 is disposed inside the water injection valve body 3, and one end of the water injection elastic pin assembly 8 is in contact with the water injection valve diaphragm 5. The water injection elastic pin assembly 8 includes a valve core that can move axially. A conical orifice 11 is disposed inside the water injection valve body 3 between the inlet pipe and the outlet pipe, and a conical surface 10 is disposed on the valve core, which is connected to the conical orifice 11. While achieving a seal through the tight fit between the conical surface 10 and the conical opening 11, the valve core's axial movement can also be precisely controlled by differential pressure to accurately adjust the opening between the conical surface 10 and the conical opening 11, ultimately precisely controlling the fluid flow rate.

[0029] The pilot valve body 1 is connected to the inlet of the external pressure reducing valve, the atmospheric connection valve body 2 is connected to the external atmospheric environment through the air port 21, and the water injection valve body 3 is connected to the outlet of the external pressure reducing valve. Simultaneously, the pilot valve body 1 is equipped with an inlet and an outlet, both of which are equipped with electrically controlled valves. The opening and closing of these electrically controlled valves control the water inlet and outlet within the pilot valve body 1. The pilot valve diaphragm 4 and the water injection valve diaphragm 5 are located at opposite ends of the atmospheric connection valve body 2, and are connected by a near-rigid pilot spring 6. The pressure difference across the pilot valve diaphragm 4—that is, the pressure difference between the liquid pressure on one side of the pilot valve diaphragm 4 and the gas pressure from the atmospheric connection valve body 2 on the other side—drives the pilot-guided flexible pin assembly 7 to adaptively move and adjust, thereby ensuring internal pressure balance within the valve body. This eliminates the need for external power to drive the pilot-guided flexible pin assembly 7. Similarly, the pressure difference between the two sides of the water injection valve diaphragm 5, that is, the pressure difference between the liquid pressure on one side of the water injection valve diaphragm 5 and the gas pressure from the atmosphere in the valve body 2 on the other side, drives the water injection elastic pin assembly 8 to perform adaptive movement and adjustment, thereby ensuring the internal pressure balance of the valve body, without the need for external power to drive the water injection elastic pin assembly 8.

[0030] like Figure 4 As shown, the axial movement distance of the valve core satisfies:

[0031] ;

[0032] in: L1 represents the axial movement distance of the valve core; L2 represents the diameter of the small-diameter end of the valve core's conical surface; h1 represents the axial length of the conical opening; α represents the inclination angle of the conical surface; k2s This represents the equivalent coefficient of the flow area.

[0033] It should be further noted that the entire micro-power precision valve device is installed horizontally, and its levelness requirement is that the angle between the valve core and the horizontal plane is 1 / 12πrad-5 / 12πrad, preferably 1 / 6πrad-1 / 3πrad.

[0034] Example 2:

[0035] This embodiment discloses a micro-power precision valve device with a conical valve core, which is optimized based on Embodiment 1, such as... Figure 1 and Figure 3 As shown, the pilot-operated linear ejector assembly 7 includes an adjusting bolt 71 and a pilot ejector 72. The pilot ejector 72 is slidably disposed inside the pilot valve body 1. One end of the pilot ejector 72 is in contact with the pilot valve diaphragm 4. The other end of the pilot ejector 72 is provided with the adjusting bolt 71. The adjusting bolt 71 is threadedly installed at one end of the pilot valve body 1. A sealing element 75 is provided between the pilot ejector 72 and the adjusting bolt 71.

[0036] By rotating the adjusting bolt 71, the depth of the adjusting bolt 71 inserted into the pilot valve body 1 is controlled. When the pilot valve diaphragm 4 drives the pilot pin 72 to move under the action of pressure difference, the pilot pin 72 moves until it touches the end of the adjusting bolt 71. At this time, the pilot pin 72 can no longer move, thereby controlling the movement stroke of the pilot pin 72.

[0037] Furthermore, a pin connecting sleeve 73 is detachably fitted to one end of the pilot valve body 1. A pilot pin 72 is slidably disposed inside the end of the pin connecting sleeve 73 near the pilot valve diaphragm 4, and an adjusting bolt 71 is threadedly disposed inside the end of the pin connecting sleeve 73 away from the pilot valve diaphragm 4. A locking nut 74 is screwed onto the outside of the adjusting bolt 71, and one end of the locking nut 74 abuts against the end face of the pin connecting sleeve 73.

[0038] The adjusting bolt 71 is locked by locking nut 74 to fix the depth of the adjusting bolt 71 into the pilot valve body 1. The inside of the ejector pin connecting sleeve 73 is provided with an inner cavity. The pilot ejector pin 72 is slidably connected to the inner cavity to ensure that the pilot ejector pin 72 slides smoothly axially under the action of the pilot valve diaphragm 4.

[0039] The rest of this embodiment is the same as that of Embodiment 1, so it will not be described again.

[0040] Example 3:

[0041] This embodiment discloses a micro-power precision valve device with a conical valve core, which is optimized based on embodiment 1 or 2, such as... Figure 1 and Figure 3 As shown, the water-injecting elastic pin assembly 8 includes a conical pin 81, a connector 82, an actuating spring 83, and a water-injecting valve cover 84. The water-injecting valve cover 84 is located at the end of the water-injecting valve body 3 away from the atmospheric communication valve body 2. The conical pin 81 is slidably disposed inside the water-injecting valve cover 84, and the actuating spring 83 is disposed between the conical pin 81 and the water-injecting valve cover 84. The connector 82 is located at the end of the conical pin 81 near the atmospheric communication valve body 2, and one end of the connector 82 is in contact with the water-injecting valve diaphragm 5. The water-injecting valve body 3 includes an inlet pipe and a drain pipe, and the conical pin 81 is disposed between the inlet pipe and the drain pipe.

[0042] The conical ejector pin 81, under the elastic force of the actuating spring 83, blocks the drain end of the water inlet pipe. When the water injection valve diaphragm 5 moves under the pressure difference, it drives the conical ejector pin 81 to move via the connecting piece 82. Simultaneously, when water pressure is generated in the water inlet pipe, combined with the pushing force applied to the conical ejector pin 81 by the connecting piece 82, the spring force of the actuating spring 83 is overcome, thus pushing the conical ejector pin 81 to open. At this time, liquid can flow through the water inlet pipe into the interior of the water injection valve body 3 and out through the drain pipe. The elastic deformation of the actuating spring 83 can be autonomously adjusted by the pressure difference and the water injection pressure, eliminating the need for external power equipment to drive the actuating spring 83.

[0043] The rest of this embodiment is the same as that of embodiment 1 or 2, so it will not be described again.

[0044] Example 4:

[0045] This embodiment discloses a micro-power precision valve device with a conical valve core, which is optimized based on any one of embodiments 1-3, such as... Figure 1 and Figure 3 As shown, an adjusting adapter 9 is slidably disposed inside the atmospheric communication valve body 2. A pilot valve diaphragm 4 is disposed at the first end of the adjusting adapter 9, and a pilot spring 6 is disposed at the second end of the adjusting adapter 9. A diaphragm fixing member 91 is connected to the first end of the adjusting adapter 9 by a fixing bolt 92. A pilot valve diaphragm 4 is disposed between the diaphragm fixing member 91 and the first end of the adjusting adapter 9. One end of the diaphragm fixing member 91 abuts against the pilot-operated linear ejector assembly 7.

[0046] The first end of the adjusting adapter 9 is provided with a threaded hole, inside which a fixing bolt 92 is installed, and a spring is sleeved on the outside of the fixing bolt 92. The fixing bolt 92 can not only fix the diaphragm fixing member 91 to one side of the pilot valve diaphragm 4, but also adjust the preload of the spring. Under the action of the pressure difference on both sides of the pilot valve diaphragm 4, the fixing bolt 92 and the adjusting adapter 9 can be moved, realizing the autonomous control of the spring deformation, and then the fixing bolt 92 can drive the pilot pin 72 to move.

[0047] Furthermore, a limiting washer 93 is provided at one end of the atmospheric communication valve body 2 near the water injection valve body 3, and a flange that cooperates with the limiting washer 93 is provided at one end of the water injection valve diaphragm 5. Through the cooperation between the flange and the limiting washer 93, the water injection valve diaphragm 5 can be quickly positioned and installed at the end of the atmospheric communication valve body 2, ensuring the coaxiality of the water injection valve diaphragm 5 and the atmospheric communication valve body 2.

[0048] The rest of this embodiment is the same as any one of embodiments 1-3, so it will not be described again.

[0049] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A micro-powered precision valve device with a conical valve core, comprising a pilot valve body (1), an atmospheric communication valve body (2), and a water injection valve body (3), characterized in that, A pilot valve diaphragm (4) is provided between the first end of the pilot valve body (1) and the atmospheric communication valve body (2), and a water injection valve diaphragm (5) is provided between the second end of the water injection valve body (3) and the atmospheric communication valve body (2). A pilot spring (6) is provided between the pilot valve diaphragm (4) and the water injection valve diaphragm (5). A pilot-guided flexible pin assembly (7) is provided inside the pilot valve body (1), and one end of the pilot-guided flexible pin assembly (7) is connected to the pilot valve diaphragm (4). The water injection valve body (3) is provided with a water injection elastic pin assembly (8) inside, and one end of the water injection elastic pin assembly (8) is in contact with the water injection valve diaphragm (5). The water injection elastic pin assembly (8) includes a valve core that can move axially. A conical port (11) is provided inside the water injection valve body (3) between the water inlet pipe and the water outlet pipe. A conical surface (10) is provided on the valve core. The conical surface (10) is connected to the conical port (11).

2. The micro-power precision valve device with a conical valve core according to claim 1, characterized in that, The axial movement distance of the valve core satisfies: ； in: L1 represents the axial movement distance of the valve core; L2 represents the diameter of the small-diameter end of the valve core's conical surface; h1 represents the axial length of the conical opening; α represents the inclination angle of the conical surface; k 2s This represents the equivalent coefficient of the flow area.

3. The micro-power precision valve device with a conical valve core according to claim 2, characterized in that, The pilot-operated linear ejector assembly (7) includes an adjusting bolt (71) and a pilot ejector (72). The pilot ejector (72) is slidably disposed inside the pilot valve body (1). One end of the pilot ejector (72) is in contact with the pilot valve diaphragm (4). The other end of the pilot ejector (72) is provided with an adjusting bolt (71). The adjusting bolt (71) is threadedly installed at one end of the pilot valve body (1). A sealing element (75) is provided between the pilot ejector (72) and the adjusting bolt (71).

4. The micro-power precision valve device with a conical valve core according to claim 3, characterized in that, One end of the pilot valve body (1) is provided with a pin connecting sleeve (73). A pilot pin (72) is slidably provided inside the end of the pin connecting sleeve (73) near the pilot valve diaphragm (4). An adjusting bolt (71) is provided inside the end of the pin connecting sleeve (73) away from the pilot valve diaphragm (4) with a threaded fit.

5. A micro-power precision valve device with a conical valve core according to claim 4, characterized in that, The adjusting bolt (71) is screwed with a locking nut (74), one end of which abuts against the end face of the ejector pin connecting sleeve (73).

6. A micro-power precision valve device with a conical valve core according to any one of claims 1-5, characterized in that, The water injection elastic pin assembly (8) includes a conical pin (81), a connector (82), an actuating spring (83), and a water injection valve cover (84). The water injection valve cover (84) is located at the end of the water injection valve body (3) away from the atmospheric communication valve body (2). The conical pin (81) is slidably arranged inside the water injection valve cover (84). An actuating spring (83) is arranged between the conical pin (81) and the water injection valve cover (84). The connector (82) is located at the end of the conical pin (81) near the atmospheric communication valve body (2). One end of the connector (82) is in contact with the water injection valve diaphragm (5).

7. A micro-power precision valve device with a conical valve core according to claim 6, characterized in that, The water injection valve body (3) includes an inlet pipe and a drain pipe, and the conical pin (81) is disposed between the inlet pipe and the drain pipe.

8. A micro-power precision valve device with a conical valve core according to any one of claims 1-5, characterized in that, An adjusting adapter (9) is slidably disposed inside the atmospheric communication valve body (2). A pilot valve diaphragm (4) is disposed at the first end of the adjusting adapter (9), and a pilot spring (6) is disposed at the second end of the adjusting adapter (9).

9. A micro-power precision valve device with a conical valve core according to claim 8, characterized in that, The first end of the adjusting adapter (9) is connected to a diaphragm fixing member (91) by a fixing bolt (92). A pilot valve diaphragm (4) is provided between the diaphragm fixing member (91) and the first end of the adjusting adapter (9). One end of the diaphragm fixing member (91) abuts against the pilot valve ferrule assembly (7).

10. A micro-power precision valve device with a conical valve core according to claim 9, characterized in that, The atmospheric communication valve body (2) is provided with a limiting washer (93) at one end near the water injection valve body (3), and the water injection valve diaphragm (5) is provided with a flange that cooperates with the limiting washer (93) at one end.

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