Engineering machinery hydraulic valve core structure

Abstract

The utility model discloses an engineering machinery hydraulic valve core structure which comprises an installation plate, a valve pipe is installed on the installation plate, a water inlet pipe and a water outlet pipeline are arranged on the valve pipe, and a valve core assembly is arranged on the side, close to the water outlet pipeline, in the valve pipe. The threaded block moving outwards is used for driving the rubber sealing piece to be tightly compressed on the water outlet pipeline to form sealing, and then when the rubber sealing piece is abraded during long-time use, the main shaft can be continuously rotated to continuously increase the moving distance of the threaded block through limiting between the ratchet wheel and the pawl; and the distance from the position of the threaded block to the outermost edge of the threaded disc when the water outlet pipeline is initially blocked is the sealing compensation distance, so that the sealing length can be continuously increased during long-time use, and the service life is relatively long.

Description

Technical Field

[0001] This utility model belongs to the field of hydraulic valve core technology, and specifically relates to a valve core structure for hydraulic valves in engineering machinery. Background Technology

[0002] A valve core is a valve component that uses its movement to achieve basic functions such as directional control, pressure control, or flow control. Based on shape, they can generally be divided into spherical (ball valve), conical (plug valve), disc-shaped (butterfly valve and gate valve), and cap-shaped (gate valve and check valve). They are generally made of bronze or stainless steel, but plastics, nylon, ceramics, and glass are also used. Traditional hydraulic valves mostly rely on the tight fit of spherical or conical valve cores for sealing. However, this sealing method, over long-term use, will eventually lead to friction and gaps in the seal, lacking a proper sealing compensation mechanism. Utility Model Content

[0003] The purpose of this utility model is to provide a valve core structure for hydraulic valves in engineering machinery to solve the above-mentioned problems.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a hydraulic valve core structure for engineering machinery, including a mounting plate, a valve tube mounted on the mounting plate, an inlet pipe and an outlet pipe provided on the valve tube, and a valve core assembly provided inside the valve tube on the side near the outlet pipe;

[0005] The valve core assembly includes a main shaft movably connected to the inside of the valve tube via a bearing. A threaded disc is fixedly connected to one end of the main shaft away from the mounting plate. A threaded block is threadedly connected to one side of the threaded disc. An extension rod is provided on the threaded block. One end of the extension rod is inserted into the threaded block and movably connected to the threaded block. A sleeve is fixedly connected to the other end of the extension rod away from the threaded block. The sleeve is sleeved on the outside of the main shaft. A connecting rod is fixedly connected between the top of the sleeve and the valve tube to restrict the rotation of the sleeve.

[0006] Preferably, a rubber seal is fixedly connected to the bottom of the threaded block, and the rubber seal moves onto the water outlet pipe and is squeezed and blocks the water outlet pipe.

[0007] Preferably, one end of the main shaft extends through the threaded disc to the side of the threaded disc away from the water outlet pipe and a spring is fixedly sleeved on its outer side. A sealing plate is fixedly connected to one side of the spring. The sealing plate is fixed to one side of the valve pipe. One end of the main shaft extends through the sealing plate to the outer side of the sealing plate and is fixedly connected to an operating component.

[0008] Preferably, a ratchet is fixedly provided on the outer side of one end of the main shaft located outside the sealing plate, a telescopic member is sleeved on the outer side of the ratchet, and at least one pawl is fixedly connected to the inner side of the telescopic member, and the pawl and the ratchet form a ratchet-pawl mechanism.

[0009] Preferably, the telescopic component is a telescopic structure and is restricted in the circumferential direction, and the mounting plate has multiple threaded holes for mounting the mounting plate and valve pipe.

[0010] The technical effects and advantages of this utility model are as follows: By utilizing the rotation of the operating component to drive the main shaft and the threaded disc to rotate, the threaded disc and the threaded block can be driven to move away from and towards the main shaft through the threaded connection. The outward movement of the threaded block drives the rubber seal to be tightly compressed on the water outlet pipe to form a seal. When the rubber seal wears out during long-term use, the ratchet and pawl can be used to limit the rotation of the main shaft and continuously increase the movement distance of the threaded block. The distance from the initial position of the threaded block when the water outlet pipe is blocked to the outermost edge of the threaded disc is the sealing compensation distance. Thus, the sealing length can be continuously increased during long-term use, resulting in a long service life and convenient operation. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0012] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0013] Figure 3 For the present utility model Figure 2 Enlarged view of part A in the middle;

[0014] Figure 4 This is a schematic diagram of the internal structure of this utility model.

[0015] In the diagram: 1. Outlet pipe; 2. Telescopic component; 3. Operating component; 4. Sealing plate; 5. Valve pipe; 6. Inlet pipe; 7. Mounting plate; 9. Spring; 10. Pawl; 11. Ratchet; 12. Threaded disc; 13. Connecting rod; 14. Sleeve; 15. Spindle; 16. Rubber seal; 17. Threaded block; 18. Extension rod. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] This utility model provides a hydraulic valve core structure for engineering machinery as shown in the figure, including a mounting plate 7, a valve tube 5 mounted on the mounting plate 7, an inlet pipe 6 and an outlet pipe 1 provided on the valve tube 5, and a valve core assembly provided inside the valve tube 5 on the side near the outlet pipe 1.

[0018] The valve core assembly includes a main shaft 15 that is movably connected to the inside of the valve tube 5 via a bearing. A threaded disc 12 is fixedly connected to one end of the main shaft 15 away from the mounting plate 7. A threaded block 17 is threadedly connected to one side of the threaded disc 12. An extension rod 18 is provided on the threaded block 17. One end of the extension rod 18 is inserted into the threaded block 17 and movably connected to the threaded block 17. A sleeve 14 is fixedly connected to the other end of the extension rod 18 away from the threaded block 17. The sleeve 14 is sleeved on the outside of the main shaft 15. A connecting rod 13 is fixedly connected between the top of the sleeve 14 and the valve tube 5 to restrict the rotation of the sleeve 14.

[0019] Specifically, a rubber seal 16 is fixedly connected to the bottom of the threaded block 17. When the rubber seal 16 moves onto the water outlet pipe 1, it is squeezed and blocks the water outlet pipe 1.

[0020] Specifically, one end of the main shaft 15 extends through the threaded disc 12 to the side of the threaded disc 12 away from the water outlet pipe 1, and a spring 9 is fixedly sleeved on the outside. A sealing plate 4 is fixedly connected to one side of the spring 9. The sealing plate 4 is fixed to one side of the valve pipe 5. One end of the main shaft 15 extends through the sealing plate 4 to the outside of the sealing plate 4 and is fixedly connected to the operating component 3.

[0021] Specifically, a ratchet 11 is fixedly installed on the outer side of one end of the main shaft 15 outside the sealing plate 4. A telescopic member 2 is sleeved on the outer side of the ratchet 11. At least one pawl 10 is fixedly connected to the inner side of the telescopic member 2, and the pawl 10 and the ratchet 11 form a ratchet-pawl mechanism.

[0022] Specifically, the telescopic component 2 is a telescopic structure and is restricted in the circumferential direction. The mounting plate 7 has multiple threaded holes, and the mounting plate 7 and valve pipe 5 are installed using the threaded holes.

[0023] Working principle: When using this utility model, water is introduced through the inlet pipe 6 and then discharged through the outlet pipe 1. During this process, the rotation of the operating component 3 drives the main shaft 15 and the threaded disc 12 to rotate. The threaded connection between the threaded disc 12 and the threaded block 17 allows the threaded block 17 to move away from and towards the main shaft 15. The outward movement of the threaded block 17 causes the rubber seal 16 to be tightly compressed onto the outlet pipe 1 to form a seal. When the rubber seal 16 wears out during long-term use, the ratchet 11 and the pawl 10 can be used to limit the rotation of the main shaft 15 and continuously increase the movement distance of the threaded block 17. The distance from the initial position of the threaded block 17 when the outlet pipe 1 is blocked to the outermost edge of the threaded disc 12 is the sealing compensation distance. Thus, the sealing length can be continuously increased during long-term use, resulting in a long service life and convenient operation.

[0024] By extending and retracting the telescopic component 2 and restricting its circumferential movement, when release is required, the telescopic component 2 can be pressed to move the pawl 10 out of the ratchet 11, thereby removing the restriction on the ratchet 11. Then, the spring 9's rebound force can be used to reset the threaded block 17, thus achieving the purpose of water flow.

[0025] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hydraulic valve core structure for engineering machinery, comprising a mounting plate (7), wherein a valve pipe (5) is mounted on the mounting plate (7), characterized in that: The valve tube (5) is provided with an inlet pipe (6) and an outlet pipe (1), and a valve core assembly is provided inside the valve tube (5) on the side near the outlet pipe (1); The valve core assembly includes a main shaft (15) movably connected to the inside of the valve tube (5) via a bearing. A threaded disc (12) is fixedly connected to one end of the main shaft (15) away from the mounting plate (7). A threaded block (17) is threadedly connected to one side of the threaded disc (12). An extension rod (18) is provided on the threaded block (17). One end of the extension rod (18) is inserted into the threaded block (17) and movably connected to the threaded block (17). A sleeve (14) is fixedly connected to one end of the extension rod (18) away from the threaded block (17). The sleeve (14) is sleeved on the outside of the main shaft (15). A connecting rod (13) is fixedly connected between the top of the sleeve (14) and the valve tube (5) to restrict the rotation of the sleeve (14).

2. The valve core structure of a hydraulic valve for engineering machinery according to claim 1, characterized in that: The bottom of the threaded block (17) is fixedly connected to a rubber seal (16). The rubber seal (16) moves to the water outlet pipe (1) and is squeezed and blocks the water outlet pipe (1).

3. The valve core structure of a hydraulic valve for engineering machinery according to claim 1, characterized in that: One end of the main shaft (15) extends through the threaded disc (12) to the side of the threaded disc (12) away from the water outlet pipe (1) and a spring (9) is fixedly sleeved on the outside. A sealing plate (4) is fixedly connected to one side of the spring (9). The sealing plate (4) is fixed to one side of the valve pipe (5). One end of the main shaft (15) extends through the sealing plate (4) to the outside of the sealing plate (4) and an operating component (3) is fixedly connected.

4. The valve core structure of a hydraulic valve for engineering machinery according to claim 3, characterized in that: The main shaft (15) is fixedly provided with a ratchet (11) on the outer side of one end outside the sealing plate (4). A telescopic member (2) is sleeved on the outer side of the ratchet (11). At least one pawl (10) is fixedly connected to the inner side of the telescopic member (2), and the pawl (10) and the ratchet (11) form a ratchet-pawl mechanism.

5. The valve core structure of a hydraulic valve for engineering machinery according to claim 4, characterized in that: The telescopic component (2) is a telescopic structure and is restricted in the circumferential direction. The mounting plate (7) has multiple threaded holes and the mounting plate (7) and valve pipe (5) are installed using the threaded holes.

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