CN217355719U - Electric control main valve core - Google Patents

Abstract

The utility model discloses an automatically controlled main valve case, including case bottom, reset spring, the case, the valve barrel, the sealing ring, the disk seat, the case bush, the case top cap, the A mouth is seted up to the left end of case bottom, P mouth is seted up to valve barrel right-hand member equipartition, the B mouth is seted up to case top cap left end equipartition, the Z mouth is seted up to case top cap right-hand member, the drain hole is seted up to the equipartition on the case, make the A mouth, the B mouth, the P mouth links to each other, there is the condition of no working solution according to Z mouth department, make the change of the liquid circulation direction between A mouth and the B mouth, the P mouth realize hydraulic equipment feed liquor and return liquid, adopt the utility model discloses an automatically controlled main valve case, compact structure, sealing performance are reliable, stable performance is reliable, long service life.

Description

Electric control main valve core

Technical Field

The utility model belongs to relate to colliery hydraulic pressure field, concretely relates to automatically controlled main valve case.

Background

The valve core of the electric control main valve is used as an important element of underground coal mining equipment, and the sealing performance and the operability of the valve core directly influence the safety and the production efficiency of underground coal mining operation. As the underground coal dust can enter the valve core assembly, a plurality of sealing parts in the valve core assembly are seriously abraded, the sealing effect of the valve core is greatly reduced, and the working efficiency of underground coal mining is seriously influenced.

Disclosure of Invention

An object of the utility model is to overcome prior art's defect, provide a compact structure, sealing performance is reliable, the stable performance is reliable, long service life's automatically controlled main valve case.

In order to achieve the purpose, the utility model discloses an automatically controlled main valve case, its structure workable for multiple specifications such as DN10, DN12, DN20 are applicable to the mining support hydraulic system of different flow demands such as 125L/min, 200L/min, 320L/min respectively. The valve core component comprises a valve core bottom cover, a valve sleeve, a reset spring, a valve core, a sealing ring, a valve seat, a valve core top cover and a valve core bush, wherein a Z port is arranged at the right end of the valve core top cover, B ports are uniformly distributed at the left end of the valve core top cover, a conical surface is arranged at the left end of the valve core bush and is tightly attached to a boss position of the valve core top cover, a conical surface is arranged at the left end of the valve core bush and forms a conical surface sealing pair with a conical surface of the valve seat, a valve core is arranged in the middle of the valve core bush, the valve seat is arranged on a first-stage boss at the right end of the valve sleeve, the sealing ring is arranged between the valve seat and a second-stage boss of the valve sleeve, a conical surface sealing pair is formed by sealing the left end surface of the sealing ring and the conical surface of the valve core, P ports are uniformly distributed at the right end of the valve sleeve, the valve core bottom cover is arranged at the left end of the valve sleeve, the two are in interference fit, an inner cavity of the valve core bottom cover is in a staged type, the first stage is provided with the reset spring, the reset spring can prevent the reset spring from being incapable of normal work caused by deformation and dislocation, and the second stage is used for limiting the displacement of the valve core, the left end of the valve core bottom cover is provided with an A port.

This automatically controlled main valve case subassembly is connected for the cartridge formula with the valve body, and the screw thread counter bore is seted up to the case right-hand member, can use specific instrument high efficiency swiftly to take out case subassembly is whole, easy dismounting improves work efficiency greatly.

A plurality of liquid guide holes are uniformly distributed on a valve core top cover, a valve sleeve and a valve core of the electric control main valve core, so that working liquid can smoothly pass through an inner cavity of the valve core assembly.

The valve core of the electric control main valve performs proper selection and reasonable clearance fit on the materials of the spring seat, the piston and the valve core, and ensures that the safety valve moves flexibly and reliably.

Drawings

FIG. 1 is a cross-sectional view of an embodiment of the present invention;

fig. 2 is a schematic view of a hydraulic principle of the embodiment of the present invention.

Labeled as: 10. a valve core bottom cover; 11. a valve housing; 12. a return spring; 13. a valve core; 14. a seal ring; 15. a valve seat; 16. a valve core top cover; 17. and a spool bushing.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

The utility model relates to an automatically controlled main valve case, its structure machinable be DN10, DN12, DN20 etc. multiple specification, be applicable to respectively that the flow is 125L/min, 200L/min, 320L/min's mining support hydraulic system. The valve core component comprises a valve core bottom cover 10, a valve sleeve 11, a reset spring 12, a valve core 13, a sealing ring 14, a valve seat 15, a valve core top cover 16 and a valve core bush 17, wherein a Z port is formed at the right end of the valve core top cover 16, a B port is uniformly formed at the left end of the valve core top cover 16, the right end of the valve core bush 17 is tightly attached to a boss of the valve core top cover 16, a conical surface is formed at the left end of the valve core bush 17 to form a conical surface sealing pair with the conical surface of the valve seat 15, the valve core 13 is placed in the middle of the valve core bush 17, the valve seat 15 is placed on a first-stage boss at the right end of the valve sleeve 11, the sealing ring 14 is placed between the valve seat 15 and a second-stage boss of the valve sleeve 11, the left end surface of the sealing ring 14 and the conical surface of the valve core 13 form a conical surface sealing pair, a P port is uniformly formed at the right end of the valve sleeve 11, the valve core bottom cover 10 is placed at the left end of the valve sleeve 11 in interference fit, an inner cavity of the valve core bottom cover 10 is in a staged type, the first stage is placed with the reset spring 12, and can prevent the reset spring 12 from deforming, The malposition results in the failure of normal operation, the second level is to limit the displacement stroke of the valve core 13, and the left end of the valve core bottom cover 10 is provided with an A port.

The working principle of the valve core of the electric control main valve is as follows: the utility model generally uses emulsion as working medium. When working fluid is arranged at the position of the Z port, the pressure of the high-pressure fluid at the position of the Z port is continuously increased, the right end of the valve core bush 17 is provided with an inclined plane with a certain angle, the high-pressure fluid between the right end of the valve core 13 and the valve core top cover 16 also acts on the valve core bush 17 and enables the valve core bush 17 to move leftwards, the left end of the valve core bush 17 is provided with a conical surface which forms a sealing pair with the conical surface of the valve seat 15, then the valve core bush 17 seals the position B when the valve core bush 17 moves to a corresponding position, the hydraulic pressure force applied to the right end of the valve core 13 gradually overcomes the spring force of the return spring 12 to enable the valve core to move leftwards, and the sealing pair between the conical surface of the valve core 13 and the conical surface of the sealing ring 14 is opened, so that the position A port is communicated with the position P port. And only the port A is communicated with the port P, and the inside of the equipment connected with the port A is in a liquid inlet working state. When no working liquid exists at the position of the Z port, the valve core 13 moves rightwards due to the spring force of the return spring 12, and then the conical surface of the valve core 13 is tightly attached to the conical surface of the sealing ring 14 to form a sealing pair, so that the position of the P port is in a closed state. At the moment, the liquid entering from the port A acts on the left end inclined plane of the valve core bush 17, so that the valve core bush 17 moves rightwards, the port B is opened, the port A is communicated with the port B, and the interior of equipment connected with the port A is in a liquid return working state.

The invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above-described manner. Various insubstantial improvements are made by adopting the method conception and the technical proposal of the utility model; or without improvement, the above conception and technical solution of the present invention can be directly applied to other occasions, all within the protection scope of the present invention.

Claims (3)

1. An electrically controlled main valve core, the structure of the electrically controlled main valve core can be processed into DN10, DN12 and DN20 specifications, and is respectively suitable for mining bracket hydraulic systems with different flow demands of 125L/min, 200L/min and 320L/min, and the system is composed of a valve core bottom cover, a valve sleeve, a reset spring, a valve core, a sealing ring, a valve seat, a valve core top cover and a valve core bush, and is characterized in that the right end of the valve core top cover is provided with a Z port, the left end is uniformly provided with B ports, the right end of the valve core bush is tightly attached to a boss position of the valve core top cover, the left end of the valve core bush is provided with a conical surface which forms a conical surface sealing pair with a valve seat conical surface, the valve core is arranged in the middle of the valve core bush, the valve seat is arranged on a first-step boss at the right end of the valve sleeve, the sealing ring is arranged between the valve seat and a second-step boss of the valve sleeve, the left end of the sealing ring forms a conical surface sealing pair with a conical surface of the valve core, the valve sleeve is uniformly provided with P ports, the valve core bottom cover is placed at the left end of the valve sleeve, interference fit is formed between the valve core bottom cover and the valve core bottom cover, the inner cavity of the valve core bottom cover is in a graded mode, the reset spring is placed at the first stage, the situation that the reset spring cannot normally work due to deformation and dislocation can be prevented, the second stage is used for limiting the displacement stroke of the valve core, and the port A is formed at the left end of the valve core bottom cover.

2. The electrically controlled main valve spool according to claim 1, wherein the spool assembly is connected to the valve body in a plug-in manner, and a threaded counter bore is formed in the right end of the spool, so that the spool assembly can be efficiently and quickly taken out integrally by using a special tool.

3. The electrically controlled main valve spool according to claim 1, wherein a plurality of fluid-conducting holes are uniformly formed in said spool top cover, said valve sleeve and said spool.

Images