High-pressure electric control water valve

Abstract

The utility model discloses a high-pressure electric control water valve which comprises a mounting seat, a valve body, a main valve core and a driving mechanism, and the mounting seat is provided with a fluid outlet and a fluid inlet; the valve body is fixedly mounted on the mounting seat, the main valve core is mounted in the valve body, a pressure balance cavity is formed in the valve body, a pressure-bearing core is mounted in the pressure balance cavity, the pressure-bearing core is in sealed sliding fit with the inner wall of the pressure balance cavity, and the pressure-bearing core is directly or indirectly connected with the valve body; when the fluid outlet is opened, the fluid action resultant force borne by the pressure bearing core is F2 and is opposite to the valve closing movement direction of the main valve element, and the fluid action resultant force borne by the inner wall of the pressure balance cavity is F3 and is the same as the valve closing movement direction of the main valve element. The pressure-bearing core is arranged in the pressure balance cavity, water pressure borne by the pressure-bearing core can be conducted to the valve body, the water pressure bearing area of the end of the main valve element is reduced, the water pressure borne by the main valve element is greatly reduced, and therefore a motor with small power is used for directly driving the main valve element to move to achieve opening and closing of the high-pressure water valve.

Description

Technical Field

[0001] This utility model relates to the field of high-pressure valve technology for sanitation vehicles. Specifically, it relates to a high-pressure electrically controlled water valve. Background Technology

[0002] During the sanitation vehicle cleaning process, high-pressure water is usually used to wash the ground, with water pressure reaching 10-20MPa. The valve core used to control the water flow will directly bear very high pressure, making it very difficult to open and close the valve. A lot of power is required to drive the valve. In the existing technology, compressed air or hydraulic pressure is generally used as the power source to drive the valve. The above driving methods require the additional installation of air pumps or hydraulic pumps, as well as related control valves, pipelines and energy storage components on the sanitation vehicle, which increases the vehicle burden and cost. At the same time, because the valve core bears the dual force from water pressure and driving components, its service life is difficult to guarantee. Utility Model Content

[0003] Therefore, the technical problem to be solved by this utility model is to provide a high-pressure electrically controlled water valve that reduces the water pressure borne by the valve core, thereby utilizing a smaller size motor for direct drive and achieving control of the high-pressure water valve opening and closing with a smaller driving force.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a high-pressure electrically controlled water valve, comprising a mounting base, a valve body, a main valve core, and a drive mechanism. The mounting base has a fluid outlet and a fluid inlet. The valve body is fixedly mounted on the mounting base, and the main valve core is mounted inside the valve body. The drive mechanism drives the main valve core to reciprocate to open or close the fluid outlet. A pressure balancing chamber is formed inside the main valve core, and a pressure-bearing core is installed inside the pressure balancing chamber. The pressure-bearing core and the inner wall of the pressure balancing chamber are in a sealed sliding fit. A sealing ring is installed on the outer wall of the valve body. The pressure-bearing core is sealed to the inner wall of the pressure balance chamber through the sealing ring, and the pressure-bearing core is directly or indirectly connected to the valve body. When the fluid outlet is open, the resultant force of the fluid on the outer surface and end face of the main valve core is F1, which is opposite to the direction of the main valve core's closing movement. The resultant force of the fluid on the pressure-bearing core is F2, which is opposite to the direction of the main valve core's closing movement. The resultant force of the fluid on the inner wall of the pressure balance chamber is F3, which is the same as the direction of the main valve core's closing movement. F1>0, F2>0, F3≥0. By opening a pressure balance chamber inside the valve body, the volume of the water valve can be reduced, making it suitable for the narrow space under the sweeper.

[0005] The aforementioned high-pressure electrically controlled water valve has a stepped hole with an inner diameter larger than that of the pressure balance chamber. The connection between the stepped hole and the pressure balance chamber is a second pressure balance step surface. The second pressure balance step surface is subjected to a fluid force of F3a, which is in the same direction as the valve closing movement of the main valve core, and F3a>0.

[0006] In the aforementioned high-pressure electrically controlled water valve, a pressure relief hole communicating with the pressure balance chamber is provided on one end face of the main valve core near the fluid outlet. The inner diameter of the pressure relief hole is smaller than that of the pressure balance chamber, and a first pressure balance step surface is formed at the connection between the pressure relief hole and the pressure balance chamber. The first pressure balance step surface is subjected to a fluid force of F3b, which is in the same direction as the valve closing movement of the main valve core, and F3b>0.

[0007] In the aforementioned high-pressure electrically controlled water valve, a limiting groove is formed on the main valve core along its axial direction, and a crossbar is provided in the limiting groove. The two ends of the crossbar pass through the main valve core and are connected to the valve body. The main valve core slides axially with the crossbar through the limiting groove. The end of the pressure-bearing core opposite to the fluid outlet is connected to the crossbar.

[0008] The aforementioned high-pressure electrically controlled water valve has a drive mechanism comprising a drive motor, a screw, and a nut. The drive motor is fixed to the valve body, and a sealing ring is installed between the contact surfaces of the drive motor and the valve body. The screw is coaxially connected to the output shaft of the drive motor, and the nut is threaded onto the screw. The flange edge of the nut is fixedly connected to the end of the main valve core away from the fluid outlet by a screw.

[0009] In the aforementioned high-pressure electrically controlled water valve, a compression spring is installed inside the pressure balance chamber. One end of the compression spring abuts against the pressure-bearing core, and the other end abuts against the main valve core. By installing the compression spring, the main valve core can be tightened, ensuring that the nut is always pressed against the screw, thus pre-tightening the threads, improving control accuracy, and preventing wobbling caused by thread clearance.

[0010] The aforementioned high-pressure electrically controlled water valve has a retaining ring coaxially fitted inside the valve body. The retaining ring has slots on both sides, and the two ends of the crossbar are respectively engaged in the slots of the retaining ring. Under the action of a compression spring, the pressure-bearing core, crossbar, and retaining ring are sequentially pressed together, ensuring a tight fit. The pressure-bearing core, crossbar, and retaining ring can be manufactured separately for easy assembly.

[0011] The aforementioned high-pressure electrically controlled water valve has a set screw installed on one side of the valve body, and the set screw is pressed against one end of the crossbar.

[0012] In the aforementioned high-pressure electrically controlled water valve, a positioning pin coaxial with the main valve core is provided on the crossbar, and a positioning hole is provided on one end of the pressure-bearing core adjacent to the crossbar, into which the positioning pin is inserted.

[0013] The aforementioned high-pressure electrically controlled water valve further includes a valve seat. The first end of the valve seat is installed in a mounting hole of the mounting base and sealed to the inner wall of the mounting hole via a sealing ring. The second end of the valve seat extends into the fluid outlet and is sealed to the inner wall of the fluid outlet via a sealing ring. One side of the valve seat has an inlet hole communicating with the fluid inlet, and the end of the valve seat has a drain hole communicating with the fluid outlet. The first end of the main valve core is inserted into the valve seat and opens or closes the drain hole under the drive of the drive mechanism. The inner wall of the valve seat is sealed to the outer wall of the main valve core via a sealing ring. The first end of the valve seat protrudes from the mounting base, and a sealing ring is installed on the side wall of the first end of the valve seat. The outer side wall of the first end of the valve seat is sealed to the inner wall of the valve body via the sealing ring.

[0014] The technical solution of this utility model has achieved the following beneficial technical effects:

[0015] By setting a pressure-bearing core in the pressure balancing chamber, the water pressure borne by the pressure-bearing core can be transmitted to the valve body, thus sharing some of the water pressure. The area of ​​the main valve core end bearing water pressure is reduced, significantly reducing the water pressure on the main valve core. This allows a smaller power motor to directly drive the main valve core, simplifying the drive structure, reducing the size of the water valve, achieving weight reduction, and reducing the burden on the vehicle. At the same time, because the water pressure on the water valve is reduced, the force required for opening and closing is also reduced, improving the stability and lifespan of the main valve core. Furthermore, a pressure balancing step surface is set in the pressure balancing chamber. After high-pressure water enters the pressure balancing chamber, it applies a reaction force to the pressure balancing step surface, thereby balancing the water pressure on the end face of the main valve core and further reducing the resistance when closing the water valve. Attached Figure Description

[0016] Figure 1 A three-dimensional structural diagram of the high-pressure electrically controlled water valve of this utility model;

[0017] Figure 2 A schematic diagram of the cross-sectional structure of the high-pressure electrically controlled water valve along its length.

[0018] Figure 3 A cross-sectional view of the high-pressure electrically controlled water valve of this utility model along the width direction.

[0019] The reference numerals in the figure are as follows: 1-mounting base; 1-1-fluid inlet; 1-2-fluid outlet; 1-3-mounting hole; 2-valve body; 3-drive motor; 4-main valve core; 4-1-pressure balance chamber; 4-2-stepped hole; 5-screw; 6-nut; 7-valve seat; 8-water inlet; 9-pressure bearing core; 10-compression spring; 11-pressure relief hole; 12-first pressure balance step surface; 13-second pressure balance step surface; 14-limiting groove; 15-crossbar; 16-fixing ring; 17-drain hole. Detailed Implementation

[0020] One type of high-pressure electrically controlled water valve in this embodiment, such as Figure 1-2 As shown, the device includes a valve body 2, a main valve core 4, a valve seat 7, and a mounting base 1. The mounting base 1 has a fluid inlet 1-1 along its length. The top of the mounting base 1 has a mounting hole 1-3 communicating with the fluid inlet 1-1, and the bottom of the mounting base 1 has a fluid outlet 1-2 communicating with the fluid inlet 1-1. The mounting hole 1-3 and the fluid outlet 1-2 correspond vertically. The mounting base 1 has several mounting holes 1-3 and fluid outlets 1-2 along its length. Each mounting hole 1-3 is used to install a set of valve bodies 2. High-pressure water is input into the fluid inlet 1-1, and the water flow into the fluid outlet 1-2 is controlled by each set of valve bodies 2, thereby supplying water to different cleaning nozzles to achieve cleaning.

[0021] like Figure 2-3 As shown, valve seat 7 is fixed on mounting base 1, main valve core 4 is installed inside valve body 2, valve seat 7 is sealed in mounting hole 1-3, the first end of valve seat 7 is sealed to the inner wall of mounting hole 1-3 through sealing ring, the second end of valve seat 7 extends into fluid outlet 1-2 and is sealed to the inner wall of fluid outlet 1-2 through sealing ring, the end of valve seat 7 passes through fluid inlet 1-1 and is sealed to fluid outlet 1-2; a water inlet hole 8 is opened on the side wall of valve seat 7, and a drain hole 17 is opened on the end of valve seat 7, which is fluidly connected to water inlet hole 8, water inlet hole 8 is fluidly connected to fluid inlet 1-1, and drain hole 17 is fluidly connected to fluid outlet 1-2; the first end of main valve core 4 is installed inside valve seat 7, valve body 2 A drive motor 3 is installed on the valve seat 7. The drive motor 3 drives the main valve core 4 to move axially along the valve seat 7 through a linear reciprocating motion component. The inner wall of the valve seat 7 is sealed to the outer wall of the main valve core 4 through a sealing ring. The first end of the main valve core 4 is sealed to or separated from the drain hole 17. The edge of the first end of the main valve core 4 is set as a frustum. The edge of the inlet end of the drain hole 17 is a tapered hole that matches the first end of the main valve core 4. The frustum and the tapered hole fit together to achieve a seal, thereby cutting off the water flow from the inlet hole 8 to the drain hole 17. The first end of the valve seat 7 protrudes from the mounting base 1. A sealing ring is installed on the side wall of the first end of the valve seat 7. The outer side wall of the first end of the valve seat 7 is sealed to the inner wall of the valve body 2 through the sealing ring.

[0022] like Figure 2-3As shown, a pressure balancing chamber 4-1 is provided inside the main valve core 4. A pressure-bearing core 9 is installed inside the pressure balancing chamber 4-1. The pressure-bearing core 9 and the inner wall of the pressure balancing chamber 4-1 are in a sealed sliding fit. A sealing ring is installed on the outer wall of the pressure-bearing core. The pressure-bearing core is sealed to the inner wall of the pressure balancing chamber through the sealing ring. The pressure-bearing core 9 is directly or indirectly connected to the valve body 2. When the fluid outlet 1-2 is opened, the resultant force of the fluid action on the outer surface and end face of the main valve core 4 is F1 and is opposite to the direction of the main valve core 4 closing movement. The resultant force of the fluid action on the pressure-bearing core 9 is F2 and is opposite to the direction of the main valve core 4 closing movement. The resultant force of the fluid action on the inner wall of the pressure balancing chamber 4-1 is F3 and is the same as the direction of the main valve core 4 closing movement. F1>0, F2>0, F3≥0.

[0023] Specifically, the pressure balancing chamber 4-1 has a stepped hole 4-2 with an inner diameter larger than that of the pressure balancing chamber 4-1. The connection between the stepped hole 4-2 and the pressure balancing chamber 4-1 is a second pressure balancing step surface 13. The second pressure balancing step surface 13 is subjected to a fluid force F3a, which is in the same direction as the valve closing movement of the main valve core 4, and F3a>0. The main valve core 4 has a pressure relief hole 11 on one end face adjacent to the fluid outlet 1-2, which communicates with the pressure balancing chamber 4-1. The inner diameter of the pressure relief hole 11 is smaller than that of the pressure balancing chamber 4-1. The connection between the pressure relief hole 11 and the pressure balancing chamber 4-1 forms a first pressure balancing step surface 12. The first pressure balancing step surface 12 is subjected to a fluid force F3b, which is in the same direction as the valve closing movement of the main valve core 4, and F3b>0. By using two pressure balancing step surfaces, the fluid force F3>0 on the inner wall of the pressure balancing chamber 4-1 is reduced, thereby reducing the driving force required to close the water valve. In practical applications, with a water pressure of 20MPa, the diameter of the first end face of the main valve core 4 is 10.7mm, and the diameter of the pressure relief hole 11 is 5mm. With the assistance of the pressure balance step surface, only a 42mm drive motor 3 is needed, with an operating power of about 30 watts. With the help of the lead screw pair, the main valve core 4 can be driven to move and close the high-pressure water valve, effectively simplifying the structure and reducing the number of drive components.

[0024] like Figure 3 As shown, the projected area of ​​the first pressure balancing step surface 12 and the second pressure balancing step surface 13 is equal to the projected area of ​​the first end face of the main valve core 4, thereby achieving pressure balance under the main valve core 4 and facilitating the opening and closing of the water valve.

[0025] like Figure 3As shown, a limiting groove 14 is formed on the main valve core 4 along its axial direction. A crossbar 15 is provided in the limiting groove 14. The two ends of the crossbar 15 pass through the main valve core 4 and are connected to the valve body 2. The main valve core 4 slides axially with the crossbar 15 through the limiting groove 14. The end of the pressure-bearing core 9 away from the fluid outlet 1-2 is connected to the crossbar 15. The crossbar 15 transmits the fluid pressure borne by the pressure-bearing core 9 to the valve body 2, reducing the pressure F1 on the main valve core 4.

[0026] like Figure 2-3 As shown, the drive mechanism includes a drive motor 3, a screw 5, and a nut 6. The drive motor 3 is fixed to the valve body 2, and a sealing ring is installed between the contact surfaces of the drive motor and the valve body. The screw 5 is coaxially connected to the output shaft of the drive motor 3, and the nut 6 is threaded onto the screw 5. The flange edge of the nut 6 is fixedly connected to the end of the main valve core 4 away from the fluid outlet 1-2 by screws. The main valve core 4 is restricted from rotation by the crossbar 15, allowing the screw 5 and nut 6 to perform linear drive smoothly.

[0027] like Figure 2-3 As shown, a compression spring 10 is installed in the pressure balance chamber 4-1. One end of the compression spring 10 abuts against the pressure bearing core 9, and the other end of the compression spring 10 abuts against the main valve core 4. A retaining ring 16 is coaxially fitted inside the valve body 2. The retaining ring 16 has slots on both sides. The two ends of the crossbar 15 are respectively inserted into the slots of the retaining ring 16. A set screw is installed on one side of the valve body 2. The set screw is pressed against one end of the crossbar 15. A positioning pin coaxial with the main valve core 4 is provided on the crossbar 15. A positioning hole is opened on the end of the pressure bearing core 9 adjacent to the crossbar 15. The positioning pin is inserted into the positioning hole.

[0028] In some other embodiments, the connecting component can be a connecting shaft, with one end fixed to the pressure-bearing core 9 and the other end passing through the first or second end of the main valve core 4 and connecting to a structure other than the main valve core 4. The pressure-bearing core 9 can also share the pressure. An axial guide, such as a slide rail or slider, is designed around the main valve core 4 and between it and the valve body 2 to prevent the main valve core 4 from rotating. Similarly, the linear reciprocating motion component can also adopt other structural forms in the prior art, such as a gear and rack structure. In specific installation, it can be installed coaxially with the main valve core 4, or it can be set on one side of the main valve core 4, or a thread can be formed directly on the outer or inner wall of the main valve core 4. The corresponding threaded cylinder or screw is driven by the drive motor 3 to cooperate with the main valve core 4 for driving. Similarly, a component to restrict the rotation of the main valve core 4 needs to be designed.

[0029] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of the claims of this patent application.

Claims

1. A high-pressure electrically controlled water valve, comprising a mounting base (1), a valve body (2), a main valve core (4), and a drive mechanism, wherein the mounting base (1) has a fluid outlet (1-2) and a fluid inlet (1-1); the valve body (2) is fixedly mounted on the mounting base (1), the main valve core (4) is mounted inside the valve body (2), and the drive mechanism drives the main valve core (4) to reciprocate to open or close the fluid outlet (1-2); characterized in that, The main valve core (4) has a pressure balancing chamber (4-1) inside, and a pressure-bearing core (9) is installed inside the pressure balancing chamber (4-1). The pressure-bearing core (9) is in a sealed sliding fit with the inner wall of the pressure balancing chamber (4-1), and the pressure-bearing core (9) is directly or indirectly connected to the valve body (2). When the fluid outlet (1-2) is opened, the resultant force of the fluid action on the outer surface and end face of the main valve core (4) is F1 and is opposite to the direction of the main valve core (4) closing movement. The resultant force of the fluid action on the pressure-bearing core (9) is F2 and is opposite to the direction of the main valve core (4) closing movement. The resultant force of the fluid action on the inner wall of the pressure balancing chamber (4-1) is F3 and is the same as the direction of the main valve core (4) closing movement. F1>0, F2>0, F3≥0.

2. A high voltage electrically controlled water valve according to claim 1, wherein The pressure balancing chamber (4-1) has a stepped hole (4-2) with an inner diameter larger than that of the pressure balancing chamber (4-1). The connection between the stepped hole (4-2) and the pressure balancing chamber (4-1) is a second pressure balancing step surface (13). The second pressure balancing step surface (13) is subjected to a fluid force of F3a, which is in the same direction as the valve closing movement of the main valve core (4), and F3a>0.

3. A high pressure electrically controlled water valve according to any one of claims 1-2, characterized in that, The main valve core (4) has a pressure relief hole (11) on one end face near the fluid outlet (1-2) that communicates with the pressure balance chamber (4-1). The inner diameter of the pressure relief hole (11) is smaller than that of the pressure balance chamber (4-1). The connection between the pressure relief hole (11) and the pressure balance chamber (4-1) forms a first pressure balance step surface (12). The first pressure balance step surface (12) is subjected to a fluid force of F3b and is in the same direction as the valve closing movement of the main valve core (4), where F3b>0.

4. A high voltage electrically controlled water valve according to claim 1, wherein The main valve core (4) has a limiting groove (14) along its axial direction. A crossbar (15) is provided in the limiting groove (14). The two ends of the crossbar (15) pass through the main valve core (4) and are connected to the valve body (2). The main valve core (4) slides axially with the crossbar (15) through the limiting groove (14). The end of the pressure-bearing core (9) away from the fluid outlet (1-2) is connected to the crossbar (15).

5. A high pressure electrically controlled water valve according to claim 4, wherein The drive mechanism includes a drive motor (3), a screw (5) and a nut (6). The drive motor (3) is fixed on the valve body (2). The screw (5) is coaxially connected to the output shaft of the drive motor (3). The nut (6) is threaded onto the screw (5). The flange edge of the nut (6) is fixedly connected to the end of the main valve core (4) away from the fluid outlet (1-2) by a screw.

6. A high pressure electrically controlled water valve according to claim 5, wherein A compression spring (10) is provided in the pressure balance chamber (4-1). One end of the compression spring (10) abuts against the pressure bearing core (9), and the other end of the compression spring (10) abuts against the main valve core (4).

7. A high pressure electrically controlled water valve according to claim 6, wherein A retaining ring (16) is coaxially fitted inside the valve body (2). The retaining ring (16) has slots on both sides. The two ends of the crossbar (15) are respectively inserted into the slots of the retaining ring (16).

8. A high pressure electrically controlled water valve according to claim 7, wherein A set screw is installed on one side of the valve body (2), and the set screw is pressed against one end of the crossbar (15).

9. A high voltage electrically controlled water valve according to claim 7, wherein, The crossbar (15) is provided with a positioning pin coaxial with the main valve core (4). The pressure-bearing core (9) has a positioning hole on one end adjacent to the crossbar (15), and the positioning pin is inserted into the positioning hole.

10. The high voltage electrically controlled water valve of claim 1, wherein, It also includes a valve seat (7), which is installed in the mounting hole (1-3) of the mounting base (1). One side of the valve seat (7) is provided with a water inlet hole (8) that communicates with the fluid inlet (1-1), and the end of the valve seat (7) is provided with a drain hole (17) that communicates with the fluid outlet (1-2). The first end of the main valve core (4) is inserted into the valve seat (7) and opens or closes the drain hole (17) under the drive of the drive mechanism.

Images