CN216200804U

CN216200804U - Pilot valve

Info

Publication number: CN216200804U
Application number: CN202122156643.3U
Authority: CN
Inventors: 倪春晓; 刘念; 张杨杨
Original assignee: Jiangsu Yiheng Automation Equipment Co ltd
Current assignee: Jiangsu Yiheng Automation Equipment Co ltd
Priority date: 2021-09-07
Filing date: 2021-09-07
Publication date: 2022-04-05
Anticipated expiration: 2031-09-07

Abstract

The utility model relates to the technical field of pneumatic elements, in particular to a pilot valve which comprises a valve body, wherein an air inlet joint is fixedly inserted at the right side of the valve body. The pilot valve adopts a modular design, and the valve core, the three-way normally open module valve core seat, the three-way normally open module valve core ejector rod, the valve core are directly arranged inside the valve body by the spring and the operation valve core rod, so that the valve is convenient to decorate, the later use cost is reduced, and the application range is very wide; the operating valve core rod is provided with the nut, the telescopic length of the operating valve core rod can be adjusted according to needs, so that the stroke distance of two sides of the valve core is changed through the valve core spring, the maximum and minimum differential pressure values of the pilot valve are adjusted, and the adjusting operation is more convenient; the valve body both sides joint respectively has air inlet joint and mechanical valve protective sheath, when can guaranteeing the leakproofness, can also promote the durability of control end.

Description

Pilot valve

Technical Field

The utility model relates to the technical field of pneumatic elements, in particular to a pilot valve.

Background

The pilot valve, also called as a pneumatic control valve, is a pneumatic element that controls the pressure, flow rate and flow direction of air flow in a pneumatic system and ensures the normal operation of a pneumatic actuator or mechanism. The structure of the pneumatic control valve can be decomposed into a valve body and a valve core, and the valve body and the valve core are of a normally closed type and a normally open type according to the relative positions of the valve body and the valve core. The valves can be structurally divided into: stop type, sliding column type and sliding plate type valves.

The elements that control and regulate the flow of compressed air are called flow control valves. The element that changes and controls the direction of the airflow is called a directional control valve. In addition to the three types of control valves, the control valve also has logic elements capable of realizing certain logic functions, including a fluidic element without movable parts and a pneumatic logic element with movable parts.

In structural principle, the logic element is basically the same as the directional control valve, is only small in volume and path, and is generally used for realizing the logic operation function of signals. In recent years, with the miniaturization of pneumatic elements and the large number of applications of PLC control in pneumatic systems, the range of applications of pneumatic logic elements is gradually decreasing. From the control mode, the pneumatic control can be divided into intermittent control and continuous control. In a discontinuous control system, a pressure control valve, a flow control valve and a directional control valve are generally used to realize a programmed operation; in a continuous control system, in addition to pressure and flow control valves, servo and proportional control valves are used to continuously control the system.

The pilot valve structure on the market is fixed at present, and the dismouting is very inconvenient, leads to the unable quick dismantlement of inside pressure regulating mechanism to change, and the modularization degree is low, and application scope is very single.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is as follows: in order to solve the problems existing in the background technology, an improved pilot valve is provided, the problem that the existing pilot valve on the market is fixed in structure and inconvenient to disassemble and assemble, the internal pressure regulating mechanism cannot be disassembled and replaced quickly, the modularization degree is low, and the application range is very single is solved.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model provides a pilot valve, includes the valve body, valve body right side peg graft and be fixed with air inlet joint, the inside activity of valve body be equipped with the case, the inside air inlet joint left side that is located of valve body peg graft and have the tee bend normally open module case seat, the inside activity of tee bend normally open module case seat peg graft and have the tee bend normally open module case ejector pin, the tee bend normally open module case ejector pin left side be located tee bend normally open case seat inside and be provided with the spring for the case, the valve body left side seted up the side direction flexible control hole, the inside activity of side direction flexible control hole peg graft and have the operating valve core pole, the valve body left side be located the fixed this mechanical valve protective sheath of peripheral joint of operating valve core pole, the operating valve core pole be equipped with the nut, the coaxial operation ejector pin that has cup jointed in operating valve core pole left side.

The three-way normally open module valve core seat and the valve body inner cavity connecting surface are provided with O-shaped first sealing rings, and the outer side surface of the operating valve core rod is provided with an annular sealing groove internally provided with an O-shaped second sealing ring.

The two ends of the valve core are respectively provided with a sealing head with a truncated cone-shaped structure, the left side surface of the valve core is provided with a lateral installation clamping groove, and the right end of the valve core ejector rod of the tee normally-open module is clamped and fixed with the sealing head on the left side of the valve core by being inserted into the lateral installation clamping groove.

The outer side surface of the valve core seat of the three-way normally open module is provided with an annular transition groove, the inner side surface of the valve core seat of the three-way normally open module is provided with an inner diversion hole communicated with the annular transition groove, and the outer side surface of the valve body is provided with an outer diversion hole corresponding to the annular transition groove.

The valve body left surface be located the flexible control hole periphery of side direction and have outside bellied integrative structure installation pipe, installation pipe outside arcwall on seted up ring groove, mechanical valve protective sheath medial surface be located right side open position have with ring groove matched with integrative structure annular clamp, the mechanical valve protective sheath pass through annular clamp cover and fix at ring groove inside and installation pipe lateral surface joint.

The outer side surface of the valve body is provided with four circular assembly holes which are arranged in an array manner.

The utility model has the beneficial effects that:

(1) the pilot valve adopts a modular design, and the valve core, the three-way normally open module valve core seat, the three-way normally open module valve core ejector rod, the valve core are directly arranged inside the valve body by the spring and the operation valve core rod, so that the valve is convenient to decorate, the later use cost is reduced, and the application range is very wide;

(2) the operating valve core rod is provided with the nut, the telescopic length of the operating valve core rod can be adjusted according to needs, so that the stroke distance of two sides of the valve core is changed through the valve core spring, the maximum and minimum differential pressure values of the pilot valve are adjusted, and the adjusting operation is more convenient;

(3) the valve body both sides joint respectively has air inlet joint and mechanical valve protective sheath, when can guaranteeing the leakproofness, can also promote the durability of control end.

Drawings

The utility model is further illustrated with reference to the following figures and examples.

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is an internal cross-sectional view of the present invention.

FIG. 3 is a partial cross-sectional view of the position of the valve spool in the present invention.

FIG. 4 is a partial cross-sectional view of the position of the mechanical valve protective sleeve of the present invention.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.

Fig. 1 and the pilot valve shown in fig. 2, including valve body 1, 1 right side of valve body is pegged graft and is fixed with air intake joint 2, the inside activity of 1 inside of valve body is equipped with case 3, 1 inside air intake joint 2 left side that is located of valve body is pegged graft and is had tee bend normally open module case seat 4, the inside activity of tee bend normally open module case seat 4 is pegged graft and is had tee bend normally open module case ejector pin 5, the module case ejector pin 5 left side is located tee bend normally open 4 inside of valve case and is provided with spring 6 for the case, the side direction flexible control hole has been seted up in 1 left side of valve body, the inside activity of side direction flexible control hole is pegged graft and is had operation valve core pole 7, 1 left side of valve body is located the fixed this mechanical valve protective sheath 9 that has of 7 peripheral joints of operation valve core pole, operation valve core pole 7 is equipped with nut 10, operation ejector pin 11 has coaxially cup jointed in operation valve core pole 7 left side.

Further, in order to improve the sealing performance of the internal assembly end, an O-shaped first sealing ring 12 is installed between the connection surface of the three-way normally-open module valve core seat 4 and the inner cavity of the valve body 1, and an annular sealing groove with a built-in O-shaped second sealing ring 8 is formed in the outer side surface of the operation valve core rod 7.

As shown in fig. 3, in order to cooperate with the side direction installation, the two ends of the valve core 3 are respectively provided with a sealing head with a truncated cone-shaped structure, the left side surface of the valve core 3 is provided with a side direction installation clamping groove 13, and the right end of the three-way normally open module valve core ejector rod 5 is clamped and fixed with the sealing head on the left side of the valve core 3 by being inserted into the side direction installation clamping groove 13.

Furthermore, in order to match with lateral input, an annular transition groove 14 is formed in the outer side surface of the three-way normally open module valve core seat 4, an inner flow guide hole 15 communicated with the annular transition groove 14 is formed in the inner side surface of the three-way normally open module valve core seat 4, and an outer flow guide hole 16 is formed in the outer side surface of the valve body 1 corresponding to the annular transition groove 14.

As shown in fig. 4, in order to cooperate with the lateral installation and improve the installation firmness, the left side surface of the valve body 1 is located at the periphery of the lateral expansion control hole and is provided with an integrated structure installation pipe 17 protruding outwards, an annular clamping groove 18 is formed in the outer arc surface of the installation pipe 17, the inner side surface of the mechanical valve protection sleeve 9 is located at the right opening position and is provided with an integrated structure annular clamp 19 matched with the annular clamping groove 18, and the mechanical valve protection sleeve 9 is sleeved inside the annular clamping groove 18 through the annular clamp 19 and is clamped and fixed with the outer side surface of the installation pipe 17.

Further, in order to facilitate lateral assembly, four circular assembly holes 20 arranged in an array are formed in the outer side surface of the valve body 1.

The pilot valve adopts a modular design, and the valve core 3, the three-way normally open module valve core seat 4, the three-way normally open module valve core ejector rod 5, the valve core spring 6 and the operation valve core rod 7 are directly arranged inside the valve body 1, so that the pilot valve is convenient to decorate, reduces the later use cost, and has a very wide application range; the nut 10 is assembled on the operating valve core rod 7, and the telescopic length of the operating valve core rod 7 can be adjusted according to needs, so that the stroke distance of two sides of the valve core 3 is changed through the valve core spring 6, the maximum and minimum pressure difference values of the pilot valve are adjusted, and the adjusting operation is more convenient; the air inlet connector 2 and the mechanical valve protective sleeve 9 are respectively clamped on two sides of the valve body 1, so that the sealing performance can be guaranteed, and meanwhile, the durability of the control end can be improved.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations can be made by the worker in the light of the above teachings without departing from the spirit of the utility model. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A pilot valve, includes valve body (1), characterized by: the right side of the valve body (1) is fixedly connected with an air inlet connector (2) in an inserting mode, a valve core (3) is movably assembled in the valve body (1), a three-way normally-open module valve core seat (4) is inserted in the left side of the air inlet connector (2) in the valve body (1), a three-way normally-open module valve core ejector rod (5) is movably inserted in the three-way normally-open module valve core seat (4), a spring (6) for a valve core is arranged in the left side of the three-way normally-open module valve core ejector rod (5) in the three-way normally-open module valve core seat (4), a lateral telescopic control hole is formed in the left side of the valve body (1), an operating valve core rod (7) is movably inserted in the lateral telescopic control hole, the mechanical valve protective sleeve (9) is fixedly connected to the periphery of the operating valve core rod (7) in a clamping mode in the left side of the valve body (1), and a nut (10) is assembled on the operating valve core rod (7), the left side of the operating valve core rod (7) is coaxially sleeved with an operating ejector rod (11).

2. A pilot valve as claimed in claim 1, wherein: the three-way normally-open module valve core seat (4) and the inner cavity connecting surface of the valve body (1) are provided with O-shaped first sealing rings (12), and the outer side surface of the operating valve core rod (7) is provided with an annular sealing groove with a built-in O-shaped second sealing ring (8).

3. A pilot valve as claimed in claim 1, wherein: the novel three-way normally-opened module valve core ejector rod is characterized in that sealing heads with truncated cone-shaped structures are arranged at two ends of the valve core (3), a lateral installation clamping groove (13) is formed in the left side face of the valve core (3), and the right end of the three-way normally-opened module valve core ejector rod (5) is fixedly connected with the sealing head on the left side of the valve core in a clamping mode through inserting the lateral installation clamping groove (13).

4. A pilot valve as claimed in claim 1, wherein: the three-way normally-opened module valve core seat is characterized in that an annular transition groove (14) is formed in the outer side face of the three-way normally-opened module valve core seat (4), an inner flow guide hole (15) communicated with the annular transition groove (14) is formed in the inner side face of the three-way normally-opened module valve core seat (4), and an outer flow guide hole (16) is formed in the outer side face of the valve body (1) corresponding to the annular transition groove (14).

5. A pilot valve as claimed in claim 1, wherein: valve body (1) left surface be located the flexible control hole of side direction periphery and have outside bellied integrative structure installation pipe (17), installation pipe (17) outside arcwall on seted up ring groove (18), mechanical valve protective sheath (9) medial surface be located right side open position have with ring groove (18) matched with integrative structure annular clamp (19), mechanical valve protective sheath (9) fix with installation pipe (17) lateral surface joint inside ring groove (18) through annular clamp (19) cover.

6. A pilot valve as claimed in claim 1, wherein: the outer side surface of the valve body (1) is provided with four circular assembly holes (20) which are arranged in an array manner.