CN212203320U

CN212203320U - Ultrahigh pressure zero-leakage electromagnetic valve

Info

Publication number: CN212203320U
Application number: CN202020448174.5U
Authority: CN
Inventors: 鲁焕炯; 毛杉海; 魏荣波; 邵杰; 郑年泽
Original assignee: Yuyao Sanlixin Solenoid Valve Co ltd
Current assignee: Yuyao Sanlixin Solenoid Valve Co ltd
Priority date: 2020-03-31
Filing date: 2020-03-31
Publication date: 2020-12-22
Anticipated expiration: 2030-03-31

Abstract

The utility model discloses an ultrahigh pressure zero leakage electromagnetic valve, which comprises a valve body, an electromagnetic coil component and a piston element; the valve body comprises an inlet cavity and an outlet cavity, and a valve port is fixedly arranged in the valve body and comprises a main valve port and a guide hole; the electromagnetic coil assembly comprises a magnetism isolating pipe and a coil group; the piston element comprises a movable iron core and a valve needle; the movable iron core is internally provided with a spring guide hole and a valve needle guide hole communicated with the spring guide hole, the valve needle comprises a boss, a first guide column and a second guide column, the first guide column and the second guide column are arranged on two sides of the boss, the first guide column penetrates through the valve needle guide hole and then extends into the guide hole, a seal is formed between the end part of the valve needle and the opening of the main valve, a spring is arranged in the spring guide hole, and a spring sleeve is arranged outside the second guide column. The utility model discloses because the many places wizard of spring, movable iron core and needle for the concentricity of needle point is very good with the straightness that hangs down, very big weakening the impact force of superhigh pressure, consequently greatly reduced the easy defect of leaking of solenoid valve under the high-pressure condition.

Description

Ultrahigh pressure zero-leakage electromagnetic valve

Technical Field

The utility model relates to a solenoid valve technical field, more specifically relates to the solenoid valve that specially adapted used in high-pressure environment.

Background

The ultrahigh pressure electromagnetic valve is a common actuator in an automatic control system, and high pressure gas and high pressure water are the most common media. The service pressure of the ultrahigh-pressure electromagnetic valve is not generally not lower than 20MPa, and in the opening and closing processes of the electromagnetic valve, internal parts of the electromagnetic valve are difficult to avoid the impact from the pressure, which is called as a water hammer phenomenon, and the common working condition causes the service life of the existing high-pressure electromagnetic valve to be not long. Even for this reason, the actual service pressure of the solenoid valve does not reach its nominal pressure.

Common high-pressure solenoid valves generally use harder sealing materials such as PTFE and PEEK, and some special high-pressure solenoid valves use metal seals, but the forms of the seals are mostly plane seals. It is known that flat seals are particularly demanding in terms of seal manufacture and are not suitable for mass production. Meanwhile, under the working condition of ultrahigh pressure, when the electromagnetic valve is closed, the impact force of the sealing piece is very large, even if the sealing piece is particularly hard metal sealing, the sealing surface can be damaged inevitably. Once the sealing surfaces are damaged, leakage from the solenoid valve must be inevitable.

The leakage of the solenoid valve is a very important parameter for the performance of the solenoid valve, and we have now found that the use of a softer sealing material, such as rubber, can achieve zero leakage, but this is not suitable for high-pressure solenoid valves, especially for ultra-high pressure solenoid valves, because the service life is actually too short and the applicable media are very limited. In some specific occasions, the electromagnetic valve must play a role in pressure maintaining and sealing, particularly high-pressure gas, and if the electromagnetic valve leaks, one can think that one high-pressure gas cylinder is not inflated immediately.

In view of the above-mentioned shortcomings, it is necessary to provide a solenoid valve to solve the technical problem of easy leakage under high pressure.

SUMMERY OF THE UTILITY MODEL

First, technical problem to be solved

The utility model discloses an above-mentioned defect to prior art existence especially provides a zero solenoid valve that leaks of superhigh pressure to solve current technical defect.

Second, technical scheme

In order to solve the technical problem, the utility model provides an ultrahigh pressure zero leakage electromagnetic valve, which comprises a valve body, an electromagnetic coil component and a piston element;

the valve body comprises an inlet cavity and an outlet cavity, a valve port is fixedly arranged in the valve body, and the valve port comprises a main valve port which enables the inlet cavity and the outlet cavity to be communicated and a guide hole which is opposite to the main valve port;

the electromagnetic coil assembly comprises a magnetism isolating pipe fixedly arranged on the valve body and a coil group fixedly arranged outside the magnetism isolating pipe;

the piston element comprises a movable iron core and a valve needle; the movable iron core is movably arranged in the magnetism isolating pipe, a spring guide hole and a valve needle guide hole communicated with the spring guide hole are arranged in the movable iron core, a spring is arranged in the spring guide hole, the valve needle comprises a boss, a first guide column and a second guide column, the first guide column and the second guide column are arranged on two sides of the boss, the first guide column penetrates through the valve needle guide hole and then extends into the guide hole, a seal is formed between the end part of the valve needle and a main valve opening, the spring is arranged in the spring guide hole, a spring sleeve is arranged outside the second guide column, and two ends of the spring sleeve respectively abut against the boss of the magnetism isolating pipe and the valve needle.

Among the above-mentioned technical scheme, be provided with the recess in the valve body, the valve port is fixed to be set up in the recess.

Among the above-mentioned technical scheme, the valve port is fixed with the recess through the mode that the riveting was inlayed.

In the technical scheme, the outer wall of the movable iron core is provided with the annular groove, and the annular groove is internally provided with the guide ring.

Among the above-mentioned technical scheme, magnetism isolating pipe and valve body pass through threaded connection.

In the technical scheme, the O-shaped ring seal is arranged at the joint of the magnetism isolating pipe and the valve body.

In the above technical scheme, the bottom of the movable iron core is a conical surface.

In the technical scheme, the end part of the first guide column is provided with a needle point; a needle-shaped seal is formed between the needle point and the main valve port.

In the technical scheme, the coil assembly is sleeved outside the magnetism isolating pipe and fixedly connected with the magnetism isolating pipe through the flat gasket and the hexagonal nut.

In the technical scheme, the valve port is provided with a through hole, the inlet cavity of the valve body is communicated with the main valve port through the through hole, and the diameter of the through hole is larger than that of the main valve port.

Third, beneficial effect

Compared with the prior art, the utility model discloses a because spring, movable iron core and needle all have many places direction all the time, the removal of needle is more smooth and easy, and required solenoid valve is less relatively, and more smooth and easy is opened to the solenoid valve. After the coil is powered off, the movable iron core and the valve needle are pushed to move under the action of the spring, so that the needle tip is inserted into the main valve opening, and the concentricity and the verticality of the needle tip are very good due to the multi-position guide of the spring, the movable iron core and the valve needle in the period, so that the impact force of ultrahigh pressure is greatly weakened, and the defect that the electromagnetic valve is easy to leak under the high-pressure condition is greatly reduced.

Drawings

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

Fig. 2 is a schematic structural diagram of the valve needle of the present invention.

Fig. 3 is a schematic structural view of the movable core.

FIG. 4 is a schematic view of a valve port.

FIG. 5 is a schematic view of the valve body and valve port in mating relationship.

Fig. 6 is a schematic diagram of the cooperation between the movable iron core, the valve needle and the valve port.

FIG. 7 is a schematic view of a solenoid valve with the valve port closed.

FIG. 8 is a schematic view of a solenoid valve with the valve port open.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

Example 1:

referring to fig. 1 to 8, the present invention is further described in conjunction with the accompanying drawings. An ultrahigh pressure zero leakage solenoid valve comprises a valve body 1, an electromagnetic coil assembly and a piston element.

The valve body 1 comprises an inlet cavity 1a and an outlet cavity 1b, a valve port 3 is fixedly arranged in the valve body 1, and the valve port 3 comprises a main valve port 3b which enables the inlet cavity 1a and the outlet cavity 1b to be communicated and a guide hole 3c which is opposite to the main valve port 3 b;

the electromagnetic coil assembly comprises a magnetism isolating pipe 8 fixedly arranged on the valve body 1 and a coil group 11 fixedly arranged outside the magnetism isolating pipe;

the piston element comprises a movable iron core 5 and a valve needle 4; the movable iron core 5 is movably arranged in the magnetism isolating pipe 8, a spring guide hole 5b and a valve needle guide hole 5a communicated with the spring guide hole 5b are arranged in the movable iron core 5, a spring 7 is arranged in the spring guide hole 5b, the valve needle 4 comprises a boss 4d, a first guide column 4b and a second guide column 4c which are arranged on two sides of the boss 4d, the first guide column 4b penetrates through the valve needle guide hole 5a and then extends into the guide hole 3c, a seal is formed between the end part of the valve needle 4 and the main valve opening 3b, the spring 7 is arranged in the spring guide hole 5b, the spring 7 is sleeved outside the second guide column 4c, and two ends of the spring 7 are respectively abutted against the magnetism isolating pipe 8 and the boss 4d of the valve needle.

In the above structure, the guide hole 3c mainly functions as follows: firstly, the impact of the ultrahigh pressure on the valve needle 4 is weakened, so that the valve needle 4 is ensured not to be bent and deformed, and the displacement of the valve needle can be smoother; secondly, the concentricity and the verticality of the valve needle 4 during the vertical displacement are ensured, so that the valve needle 4 can better seal the main valve port 3 b. The valve needle guide hole 5a is used for ensuring the concentricity and the verticality of the vertical displacement of the valve needle 4, so that the valve needle 4 can move more smoothly.

The utility model discloses the theory of operation as follows: the coil group 11 is electrified to generate electromagnetic force to overcome the elastic force of the spring 7, the movable iron core 5 is lifted to move upwards, the movable iron core is abutted against the boss 4d on the valve needle 4 when moving upwards to synchronously drive the valve needle 4 to move upwards, so that the needle point 4a leaves the main valve port 3b, at this time, fluid in the valve body inlet cavity 1a flows to the valve body outlet cavity 1b through the main valve port 3b, and the electromagnetic valve is in an open state. The coil assembly 11 is powered off, the movable iron core 5 and the valve core 4 are displaced downwards under the action of the elastic force of the spring 11, so that the needle tip 4a is inserted into the main valve port 3b to form a seal, the main valve port 3b is closed, and the electromagnetic valve is in an open-close state at the moment. In the process of opening and closing the electromagnetic valve, the valve needle 4 passes through the guide hole 3c and the guide hole 5a, and the valve needle 4, the movable iron core 5 and the main valve port 3b are always positioned on the same central line, so that the electromagnetic force required by opening the electromagnetic valve is smaller, the impact force of ultrahigh pressure is greatly weakened, and the defect that the electromagnetic valve is easy to leak under the high-pressure condition is greatly reduced.

Wherein, the valve body 1 comprises a thread 1c connected with the magnetism isolating pipe, and a groove 1d embedded with a valve port is arranged in the valve body; the valve port 3 is riveted and embedded in the groove 1d of the valve body 1, and the flow path of the electromagnetic valve is changed by changing the size of the main valve port 3b on the valve port 3. This makes the interchangeability of the solenoid valves even more robust. Further, the blank of the valve port 3 is formed by forging to enhance the strength of the valve port, so that the valve port has enough strength to bear the impact damage of the ultrahigh pressure on the valve port. And then the corresponding dimension is obtained by metal processing.

The magnetism isolating pipe 8 and the valve body 1 are fixedly connected through threads 1c, and the two parts are sealed through an O-shaped ring 2.

Two spaced annular grooves 5c are arranged on the outer wall of the movable iron core 5, and a guide ring 6 is arranged in the annular groove 5 c. The movable iron core forms a sliding connection through two guide rings 6. In this embodiment, PTFE or PTFE are chooseed for use to the material of guide ring, and the guide ring of above-mentioned material has fine lubricated effect to make 5 displacements of movable iron core more smooth and easy. The coil 11 is sleeved on the magnetism isolating pipe 8 and fixedly connected with the hexagonal nut 9 through a flat gasket 10.

Furthermore, the valve port 3 is provided with a through hole 3a, and the through hole 3a is communicated with the valve body inlet cavity 1a and the main valve port 3 b. In this structure, the pressure in the inlet chamber of the valve body must pass through the through hole 3a to reach the main valve port 3b, so that the direct impact of the ultrahigh pressure on the main valve port 3b is avoided, thereby protecting the main valve port 3 b. The diameter of the through hole 3a is larger than that of the main valve port 3b so as to satisfy a sufficient flow rate.

As shown in fig. 3, the bottom of the movable iron core 5 is provided with a conical surface 5d, and the conical surface 5d is arranged to reduce the instant impact force of the ultrahigh pressure on the movable iron core 5 and improve the higher opening pressure of the electromagnetic valve.

Example 2:

in this embodiment, the end of the first guide post 4b is set to be the needle tip 4a, so that the needle tip 4a and the main valve port 3b form a needle-type sealing connection, compared to embodiment 1. The needle type sealing connection structure can enable the electromagnetic valve to work normally under the pressure of higher force because the stress area is small. Compared with other sealing modes, the needle type sealing has better sealing effect under ultrahigh pressure, has longer service life and is suitable for various fluid media.

The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, although the present invention describes a solenoid valve with a specific structure, the present invention is not limited to the specific solenoid valve structure. Without departing from the technical principle of the present invention, a plurality of improvements and decorations can be made, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides an ultrahigh pressure zero leakage solenoid valve, includes valve body (1), solenoid subassembly and piston element, its characterized in that:

the valve body (1) comprises an inlet cavity (1a) and an outlet cavity (1b), a valve port (3) is fixedly arranged in the valve body (1), and the valve port (3) comprises a main valve port (3b) which enables the inlet cavity (1a) and the outlet cavity (1b) to be communicated and a guide hole (3c) which is opposite to the main valve port (3 b);

the electromagnetic coil assembly comprises a magnetism isolating pipe (8) fixedly arranged on the valve body (1) and a coil group (11) fixedly arranged outside the magnetism isolating pipe;

the piston element comprises a movable iron core (5) and a valve needle (4); the movable iron core (5) is movably arranged in the magnetism isolating pipe (8), a spring guide hole (5b) and a valve needle guide hole (5a) communicated with the spring guide hole (5b) are arranged in the movable iron core (5), a spring (7) is arranged in the spring guide hole (5b), the valve needle (4) comprises a boss (4d) and a first guide column (4b) and a second guide column (4c) which are arranged at two sides of the boss (4d), the first guide column (4b) penetrates through the valve needle guide hole (5a) and then extends into the guide hole (3c), a seal is formed between the end part of the valve needle (4) and the main valve port (3b), a spring (7) is arranged in the spring guide hole (5b), the spring (7) is sleeved outside the second guide post (4c), the two ends of the magnetic-isolating pipe are respectively propped against the magnetic-isolating pipe (8) and the boss (4d) of the valve needle.

2. An ultra-high pressure zero leakage solenoid valve as claimed in claim 1 wherein: a groove (1d) is formed in the valve body (1), and the valve port (3) is fixedly arranged in the groove (1 d).

3. An ultra-high pressure zero leakage solenoid valve as claimed in claim 2 wherein: the valve port (3) is fixed with the groove (1d) in a riveting and embedding manner.

4. An ultra-high pressure zero leakage solenoid valve as claimed in claim 1 wherein: an annular groove (5c) is formed in the outer wall of the movable iron core (5), and a guide ring (6) is arranged in the annular groove (5 c).

5. An ultra-high pressure zero leakage solenoid valve as claimed in claim 1 wherein: the magnetism isolating pipe (8) is connected with the valve body (1) through threads.

6. An ultra-high pressure zero leakage solenoid valve as claimed in claim 5 wherein: an O-shaped ring (2) is arranged at the joint of the magnetism isolating pipe (8) and the valve body (1) for sealing.

7. An ultra-high pressure zero leakage solenoid valve as claimed in claim 1 wherein: the bottom of the movable iron core (5) is a conical surface (5 d).

8. An ultra-high pressure zero leakage solenoid valve as claimed in claim 1 wherein: a needle point (4a) is arranged at the end part of the first guide column (4 b); a needle type seal is formed between the needle point (4a) and the main valve port (3 b).

9. An ultra-high pressure zero leakage solenoid valve as claimed in claim 1 wherein: the coil assembly (11) is sleeved outside the magnetism isolating pipe (8) and fixedly connected with the magnetism isolating pipe through a flat gasket (10) and a hexagonal nut (9).

10. An ultra-high pressure zero leakage solenoid valve as claimed in claim 1 wherein: a through hole (3a) is arranged in the valve port (3), the valve body inlet cavity (1a) and the main valve port (3b) are communicated through the through hole (3a), and the diameter of the through hole (3a) is larger than that of the main valve port (3 b).