Hydraulic pump control valve

Abstract

This utility model discloses a hydraulic pump control valve, including a valve body, a ball core, a valve stem, and a handle. The valve body has a valve cavity inside, with the ball core placed within the cavity. The valve body has an inlet and an outlet end, and a valve seat is fixedly mounted on the inner wall of the valve body. A first connecting pipe connects to the inlet end of the valve body, and a connecting base is fixedly mounted on the outlet end. A rotating rod is mounted on the other end of the connecting base, with a rocker arm vertically welded to it. A cover plate is fixedly mounted at the bottom of the rocker arm. A valve disc is vertically fixed to the outlet end of the valve body and abuts against the cover plate. An external thread is provided on the outer wall of the connecting base to connect a connecting cover, and a second connecting pipe connects to the other end of the connecting cover. Under the action of counter-current pressure and its own weight, the cover plate quickly adheres to the valve disc, blocking the reverse flow path, preventing high-pressure fluid from impacting the ball core, and extending the service life of the components. The threaded connection between the connecting cover and the connecting base facilitates the replacement and maintenance of components such as the cover plate.

Description

Technical Field

[0001] This utility model relates to control valves, and more particularly to a hydraulic pump control valve. Background Technology

[0002] Hydraulic pump control valves are core control components in hydraulic systems. Their performance directly determines the pressure, flow rate, and directional stability of the hydraulic pump's output oil, thus affecting the overall efficiency of the hydraulic system and the accuracy of the actuators. In the market, existing hydraulic pump control valves rely solely on the ball valve's ball core and seat for hydraulic control in practical applications. However, when the hydraulic pump stops or the ball valve closes, the fluid in the downstream pipeline will generate reverse pressure due to inertia. This can easily lead to fluid backflow when the system pressure fluctuates. The high-pressure fluid flowing in reverse directly impacts the ball valve's ball core and other components, easily accelerating the wear of the ball core, shortening the service life of the entire control valve, and in severe cases, even causing unstable hydraulic system pressure, affecting the normal operation of the equipment. Utility Model Content

[0003] To address the shortcomings of the aforementioned technologies, this utility model provides a hydraulic pump control valve.

[0004] To solve the above technical problems, the technical solution adopted by this utility model is: a hydraulic pump control valve, including a valve body, a ball core, a valve stem, and a handle for driving the valve stem to rotate; a valve cavity is provided inside the valve body, the ball core is placed inside the valve cavity, and a connecting channel is provided on the ball core; the valve body is provided with an inlet end and an outlet end that communicate with the valve cavity, and a valve seat is fixedly provided on the inner wall of the valve body, the valve seat abutting against the ball core; a valve stem is fixedly provided above the ball core, and a handle is sleeved on the top of the valve stem; The valve body has a first connecting pipe at the inlet end and a connecting base fixedly installed at the outlet end. The connecting base is connected to one end of the valve body and a rotating rod is installed at the other end. A rocker arm is vertically welded on the rotating rod and a cover plate is fixedly installed at the bottom end of the rocker arm. A valve disc is fixedly installed on the inner wall of the valve body and is vertically fixed to the outlet end of the valve body. The valve disc abuts against the cover plate. The outer wall of the connecting base is provided with external threads to connect one end of the connecting cover, and the other end of the connecting cover is connected to a second connecting pipe. The inner walls of the first connecting pipe and the inner walls of the second connecting pipe are both provided with first internal threads.

[0005] Furthermore, the end of the first internal thread in the second connecting pipe is provided with an annular sealing groove.

[0006] Furthermore, a limiting groove is formed on the outer wall of the valve body near the outlet end along the circumference; the outer wall of the connecting cover is bolted with a reinforcement device for matching the limiting groove.

[0007] Furthermore, the edges of the limiting groove are rounded.

[0008] Furthermore, the reinforcement device includes an upper clamping plate, a lower clamping plate, and a spring; the lower clamping plate is symmetrically provided with screws to be fixedly mounted on the connecting cover, one end of the spring is connected to the upper clamping plate, and the other end of the spring is connected to the lower clamping plate; the length of the upper clamping plate is greater than the length of the lower clamping plate, and a limit block is fixedly provided at the front end of the upper clamping plate.

[0009] Furthermore, the limiting block has a triangular prism structure with a vertices of 60 degrees.

[0010] This utility model discloses a hydraulic pump control valve. Under the action of reverse flow pressure and its own gravity, the cover plate quickly adheres to the valve disc, which can block the reverse flow channel, prevent high-pressure fluid from impacting the ball core, and extend the service life of core components. The connecting cover is threaded to the connecting base, which facilitates disassembly and allows for the replacement and maintenance of components such as the cover plate and rocker arm, thereby improving the reliability of the system. Attached Figure Description

[0011] Figure 1 This is a perspective view of Example 1.

[0012] Figure 2 This is a structural diagram of Example 1.

[0013] Figure 3 This is a perspective view of Example 2.

[0014] Figure 4 This is a structural diagram of Example 2.

[0015] Figure 5 for Figure 3 An enlarged schematic diagram of part A in the middle.

[0016] In the diagram: 1. Valve body; 2. Valve stem; 3. Connecting cover; 4. Second connecting pipe; 5. First internal thread; 6. Ball core; 7. Connecting base; 8. External thread; 9. Cover plate; 10. Valve disc; 11. Limiting groove; 12. Screw; 13. Upper clamping plate; 14. Lower clamping plate; 15. Spring; 16. Limiting block. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0018] Example 1:

[0019] like Figure 1-2As shown, a hydraulic pump control valve includes a valve body 1, a ball core 6, a valve stem 2, and a handle for driving the valve stem 2 to rotate. The valve body 1 has a valve cavity inside, and the ball core 6 is placed inside the valve cavity, with a connecting channel on the ball core 6. The valve body 1 has an inlet end and an outlet end communicating with the valve cavity. A valve seat is fixedly installed on the inner wall of the valve body 1, and the valve seat abuts against the ball core 6, forming a seal. The valve stem 2 is fixedly installed above the ball core 6, and a handle is sleeved on the top of the valve stem 2. The valve stem 2 and the ball core 6 are linked and cooperate. It should be noted that this configuration is a conventional technical means for those skilled in the art, enabling the ball core 6 to rotate synchronously when the handle is rotated to switch the on / off state of the valve port. The inlet end of the valve body 1 is connected to a first connecting pipe, and the outlet end of the valve body 1 is fixedly provided with a connecting base 7; in this embodiment, the outer diameter of the connecting base 7 is smaller than the outer diameter of the outlet end of the valve body 1.

[0020] The outer wall of the connecting base 7 is provided with an external thread 8 for threaded connection to one end of the connecting cover 3. It should be noted that one end of the connecting cover 3 has a second internal thread, and the external thread 8 of the connecting base 7 and the second internal thread of the connecting cover 3 are mutually compatible. The other end of the connecting cover 3 is connected to a second connecting pipe 4. The inner walls of both the first connecting pipe and the second connecting pipe 4 are provided with first internal threads 5, which connect to other pipes. It should be noted that in this embodiment, the end of the first internal thread 5 in the second connecting pipe 4 is provided with an annular sealing groove for installing an O-ring to achieve a sealed connection with other external pipes.

[0021] A rotating rod is provided at the other end of the connecting base 7, which is connected to the valve body 1. A rocker arm is connected to the rotating rod, and a cover plate 9 is fixedly provided at the bottom of the rocker arm. An annular sealing gasket is provided on the side of the cover plate 9 facing the valve disc 10. The valve disc 10 is fixedly provided on the inner wall of the valve body 1. The valve disc 10 is vertically fixed to the outlet end of the valve body 1. The valve disc 10 has an annular structure, and its edge is sealed with the inner wall of the valve body 1. When no liquid is flowing, the valve disc 10 abuts against the inner wall of the cover plate 9. That is, when the liquid flows backward, the liquid pressure pushes the cover plate 9 to adhere to the end face of the valve disc 10, thereby achieving a check seal. It should be noted that in this embodiment, the end of the connecting base 7 away from the valve body 1 is rotatably connected to the rotating rod through a horizontal pin. A rocker arm is vertically welded on the rotating rod, forming a lever structure that can rotate around the pin.

[0022] The usage process of this utility model: 1. Connect the inlet and outlet ends to other water pipes through the first connecting pipe and the second connecting pipe 4; turn the handle and drive the ball core 6 to rotate, so that the ball valve is in the fully open state; Second, at this time, the liquid enters the valve body 1 from the inlet end, enters the valve body 1 channel and passes through the connecting channel of the ball core 6, and applies pressure to the water-facing surface of the cover plate 9. This pressure overcomes the initial sealing force between the cover plate 9 and the valve disc 10, and the cover plate 9 opens around the rotating rod in a direction away from the valve disc 10. It should be noted that the force applied to the cover plate 9 varies depending on the hydraulic pressure, and the degree of opening of the cover plate 9 varies. That is, when the hydraulic pressure increases, the thrust of the liquid on the cover plate 9 increases, the opening angle of the cover plate 9 increases, the flow gap expands, and the flow resistance is reduced. When the hydraulic pressure decreases, the thrust decreases, and the opening angle of the cover plate 9 decreases under its own weight and the tendency to reset, the flow gap narrows, and the fluid flows steadily. 3. After use, turn the handle in the opposite direction to drive the ball core 6 to rotate to the closed position. The outer wall of the ball core 6 will fit tightly against the inner wall of the valve body 1, cutting off the fluid passage. 4. During routine maintenance and repair, rotate the connecting cover 3 to separate the connecting cover 3 from the connecting base 7, and manually clean, replace and repair components such as the rocker arm and cover plate 9; after the repair is completed, reset and reassemble in the reverse order.

[0023] When the ball valve is closed or the pressure drops suddenly, the downstream fluid may flow backward due to inertia or reverse pressure. Under the action of the reverse pressure and its own gravity, the cover plate 9 quickly adheres to the valve disc 10, which can block the reverse flow path and prevent high-pressure fluid from impacting the ball core 6, thus extending the service life of the core components. The connecting cover 3 is threaded to the connecting base 7, which facilitates disassembly and allows for the replacement and maintenance of components such as the cover plate 9 and the rocker arm, thereby improving the reliability of the system.

[0024] Example 2:

[0025] like Figure 3-5 As shown, a limiting groove 11 is continuously formed along the circumference of the outer wall of the valve body 1 near the outlet end; a reinforcing device is bolted to the outer wall of the connecting cover 3, and the reinforcing device cooperates with the limiting groove 11 to ensure the stability of the connection between the connecting cover 3 and the valve body 1. In this embodiment, the edge of the limiting groove 11 is rounded to facilitate the insertion of the limiting block 16 into the limiting groove 11.

[0026] In this embodiment, the reinforcement device includes an upper clamping plate 13, a lower clamping plate 14, and a spring 15. Screws 12 are symmetrically arranged on the lower clamping plate 14 to fix it to the connecting cover 3. One end of the spring 15 is connected to the upper clamping plate 13, and the other end of the spring 15 is connected to the lower clamping plate 14. It should be noted that the upper clamping plate 13 and the lower clamping plate 14 are connected by a relatively rotatable connecting structure, namely the spring 15, so that the upper clamping plate 13 can rotate relative to the lower clamping plate 14, and under the elastic action of the spring 15, the upper clamping plate 13 and the lower clamping plate 14 can maintain a preset relative position.

[0027] The upper clamping plate 13 is longer than the lower clamping plate 14. A limiting block 16 is fixedly installed at the front end of the upper clamping plate 13. In this embodiment, the limiting block 16 has a triangular prism structure with a vertices of 60 degrees. In this embodiment, the limiting groove 11 is an annular through groove with a rectangular cross-section and a groove depth of 5mm. When the connecting cover 3 and the connecting base 7 are tightened, the limiting block 16 is embedded into the limiting groove 11 under the force of the spring 15, forming a limiting position. It should be noted that the shape of the limiting block 16 does not need to be perfectly matched with the shape of the limiting groove 11. It is sufficient for one side of the limiting block 16 to abut against the limiting groove 11 on the outer wall of the valve body 1 to achieve the effect of limiting and reinforcing. By pressing the rear end of the upper clamping plate 13 and rotating the connecting cover 3, the connecting cover 3 and the connecting base 7 can be separated.

[0028] By installing a reinforcing component between the connecting cover 3 and the connecting base 7, the risk of fluid leakage caused by loose connection is avoided when the fluid pressure fluctuates significantly.

[0029] In summary, the second embodiment in this specification mainly describes the differences from the first embodiment. The same or similar parts between the first embodiment and other embodiments can be referred to each other.

[0030] The above embodiments are not intended to limit the present utility model, nor is the present utility model limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the technical solution of the present utility model are also within the protection scope of the present utility model.

Claims

1. A hydraulic pump control valve comprising a valve body (1), a ball core (6), a valve stem (2) and a handle for driving the valve stem (2) to rotate, characterized in that: The valve body (1) has a valve cavity inside, and the ball core (6) is placed inside the valve cavity. The ball core (6) has a connecting channel. The valve body (1) has an inlet end and an outlet end that communicate with the valve cavity. The valve seat is fixedly installed on the inner wall of the valve body (1), and the valve seat abuts against the ball core (6). The valve stem (2) is fixedly installed above the ball core (6), and a handle is sleeved on the top of the valve stem (2). The inlet end of the valve body (1) is connected to a first connecting pipe, and the outlet end of the valve body (1) is fixedly provided with a connecting base (7); the other end of the connecting base (7) connected to one end of the valve body (1) is provided with a rotating rod, a rocker arm is vertically welded on the rotating rod, and a cover plate (9) is fixedly provided at the bottom end of the rocker arm; a valve disc (10) is fixedly provided on the inner wall of the valve body (1), the valve disc (10) is vertically fixed to the outlet end of the valve body (1), and the valve disc (10) abuts against the cover plate (9); The outer wall of the connecting base (7) is provided with an external thread (8) to connect one end of the connecting cover (3), and the other end of the connecting cover (3) is connected to a second connecting pipe (4). The inner wall of the first connecting pipe and the inner wall of the second connecting pipe (4) are both provided with a first internal thread (5).

2. The hydraulic pump control valve of claim 1, wherein: The end of the first internal thread (5) in the second connecting pipe (4) is provided with an annular sealing groove.

3. The hydraulic pump control valve of claim 1, wherein: The valve body (1) has a circumferentially ...

4. The hydraulic pump control valve of claim 3, wherein: The edge of the limiting groove (11) is rounded.

5. The hydraulic pump control valve of claim 4, wherein: The reinforcement device includes an upper clamping plate (13), a lower clamping plate (14), and a spring (15); the lower clamping plate (14) is symmetrically provided with screws (12) to be fixedly installed on the connecting cover (3), one end of the spring (15) is connected to the upper clamping plate (13), and the other end of the spring (15) is connected to the lower clamping plate (14); the length of the upper clamping plate (13) is greater than the length of the lower clamping plate (14), and a limit block (16) is fixedly provided at the front end of the upper clamping plate (13).

6. The hydraulic pump control valve according to claim 5, characterized in that: The limiting block (16) has a triangular prism structure with a vertices of 60 degrees.

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