CN217842887U

CN217842887U - Bidirectional stop electromagnetic reversing valve

Info

Publication number: CN217842887U
Application number: CN202221626908.XU
Authority: CN
Inventors: 刘传运; 曲春秋; 罗占涛; 李响
Original assignee: Zhejiang Sanshang Zhidi Technology Co ltd
Current assignee: Zhejiang Sanshang Zhidi Technology Co ltd
Priority date: 2022-06-27
Filing date: 2022-06-27
Publication date: 2022-11-18
Anticipated expiration: 2032-06-27

Abstract

The utility model provides a two-way cut-off electromagnetic directional valve, which belongs to the field of electromagnetic valves and comprises a valve body, wherein an electromagnetic coil is sleeved outside the valve body, a valve sleeve is arranged at the front end of the valve body, a tail valve and a locking nut are arranged at the rear end of the valve body, an armature controlled to move by the electromagnetic coil is arranged in the valve body, the front end of the armature is connected with a valve core, and the front end of the valve core abuts against a first liquid port and a second liquid port on the valve sleeve; the rear end of armature is equipped with elasticity pressure regulating spare, elasticity pressure regulating spare one end butt in the tail is out, elasticity pressure regulating spare other end butt in armature, armature can the valve barrel internal motion. The utility model discloses can guarantee armature and push rod direct contact, when armature received the electromagnetic force effect, can directly promote the case and remove, greatly reduced two-way response time and the dead zone electric current by the electromagnetic directional valve, guarantee that it has very fast response speed.

Description

Bidirectional stop electromagnetic reversing valve

Technical Field

The utility model belongs to the solenoid valve field, more specifically relates to a two-way solenoid directional valve that ends.

Background

The electromagnetic directional valve can control the valve core to move by utilizing the force generated when the magnet is electrified for attraction so as to control the opening and closing of each oil drain hole, and has the advantages of simple operation, high automation degree and the like. At present, the electromagnetic directional valve is widely applied to the fields of aerospace, ships, engineering machinery and the like, and is a commonly used control element in a hydraulic system.

The prior art discloses various electromagnetic directional valves, for example, CN 1027901A discloses a bidirectional, small-volume, low-leakage and high-pressure electromagnetic directional valve, which adopts a pilot type plug-in mounting structure and can be applied to occasions with high pressure, large flow and small space; CN203500557U discloses a two-position two-way stop electromagnetic directional valve, each mating surface is sealed by a high-pressure sealing ring, can bear higher pressure, and is suitable for an oil circuit of a high-power hydraulic device requiring higher pressure and high sensitivity. However, the electromagnetic directional valve provided by the prior art generally has the problems of long response time, large dead zone current, large hysteresis loop and the like, and the actual application effect of the electromagnetic directional valve is seriously influenced.

SUMMERY OF THE UTILITY MODEL

To the defect of prior art, the utility model aims to provide a two-way solenoid directional valve that ends aims at solving the great problem of current solenoid directional valve response time length, dead zone electric current are big, hysteresis loop.

In order to achieve the purpose, the utility model provides a two-way cut-off electromagnetic directional valve, which comprises a valve body, wherein an electromagnetic coil is sleeved outside the valve body, a valve sleeve is arranged at the front end of the valve body, a tail valve and a locking nut are arranged at the rear end of the valve body, an armature controlled by the electromagnetic coil to move is arranged in the valve body, the front end of the armature is connected with a valve core, the valve core can move in the valve sleeve and is communicated with or cuts off a first liquid port and a second liquid port on the valve sleeve; the rear end of armature is equipped with elasticity pressure regulating spare, elasticity pressure regulating spare one end butt in the tail is out, elasticity pressure regulating spare other end butt in armature, armature can the valve barrel internal motion.

Preferably, an insulating bush is arranged between the outer wall of the armature and the inner wall of the valve body.

As a further preferred option, the elastic pressure regulating part comprises a pressure regulating rod main body, a spring is sleeved at the front end of the pressure regulating rod main body, a limiting groove used for mounting the spring is formed in the armature, and the spring has a movement trend for pushing the armature to move forwards.

Preferably, the pressure regulating rod body is provided with a limiting boss, and the front end of the tail yoke is provided with a limiting groove corresponding to the limiting boss.

Preferably, the pressure regulating rod main body is provided with an annular groove, and an O-shaped sealing ring is installed in the annular groove.

Preferably, a push rod is connected between the armature and the valve core, a clamping boss is arranged at the head of the push rod, and a clamping groove corresponding to the clamping boss is arranged on the armature.

As a further preferred option, a first spring seat, a return spring and a second spring seat are sleeved on the valve core, and the return spring is located between the first spring seat and the second spring seat.

As further preferred, the second spring holder cover is established on the case and the outer wall with the laminating of valve barrel inner wall, the second spring holder with the case form first seal groove between the valve barrel, be equipped with first sealing washer in the first seal groove.

Preferably, the valve sleeve is provided with a second sealing groove for sealing with the valve body, and a second sealing ring is arranged in the second sealing groove; and a third sealing groove for sealing the valve body is arranged on the tail valve, and a third sealing ring is arranged in the third sealing groove.

Preferably, the valve body is provided with a mounting seat attached to the lock nut, the mounting seat is hinged to a tail plate, and the elastic pressure regulating piece can be pressed when the tail plate rotates.

Generally, through the utility model discloses above technical scheme that conceive compares with prior art, has following beneficial effect:

1. the utility model provides a two-way solenoid directional valve that ends supports armature through setting up elasticity pressure regulating part in the inside of armature, can guarantee armature and case contact, when armature receives the electromagnetic force effect, can directly promote the case to remove, greatly reduced two-way solenoid directional valve's response time and blind spot current, guaranteed that it has faster response speed;

2. particularly, the two-way stop electromagnetic directional valve provided by the utility model can effectively reduce the problem of large product hysteresis caused by overlarge friction force between the armature and the valve body by arranging the insulating bush between the valve body and the armature;

3. in addition, the two-way cut-off electromagnetic directional valve provided by the utility model is provided with the first sealing ring among the second spring seat, the valve core and the valve sleeve, the second sealing ring is arranged between the valve body and the valve sleeve, the third sealing ring is arranged between the valve body and the tail valve, and the two-way cut-off electromagnetic directional valve is provided with a multiple sealing structure, thereby having better pressure stabilizing and sealing effects;

4. furthermore, the utility model provides a two-way solenoid operated valve that ends still is provided with the mount pad, and articulated on the mount pad have the tailboard, and the tailboard promotes elasticity pressure regulating part, can realize the manual control function, can be under the condition that the operating equipment electric quantity exhausts the two-way switching that ends solenoid operated valve of manual control.

Drawings

Fig. 1 is a sectional view of a two-way cut-off electromagnetic directional valve according to a preferred embodiment of the present invention;

fig. 2 is a schematic structural diagram of a two-way stop electromagnetic directional valve provided in the preferred embodiment of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 1 at A;

FIG. 4 is an enlarged view of a portion of FIG. 1 at B;

fig. 5 is a hydraulic schematic diagram of a bidirectional stop electromagnetic directional valve according to a preferred embodiment of the present invention.

The same reference numbers will be used throughout the drawings to refer to the same or like elements or structures, wherein:

1-spring, 2-insulating bush, 3-armature, 4-valve body, 5-push rod, 6-valve core, 7-valve sleeve, 8-first liquid port, 9-second liquid port, 10-mounting seat, 11-tail, 12-pressure regulating rod body, 13-tail plate, 111-first sealing groove, 112-second sealing groove, 113-third sealing groove, 121-limiting boss, 122-annular groove, 31-limiting groove, 32-clamping groove, 51-clamping boss, 61-first spring seat, 62-return spring, 63-second spring seat and 64-steel wire check ring.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 to 5, the utility model provides a two-way cut-off electromagnetic directional valve, in order to achieve the above object, the utility model provides a two-way cut-off electromagnetic directional valve, including a valve body 4, a solenoid is sleeved outside the valve body 4, a valve sleeve 7 is arranged at the front end of the valve body 4, a tail yoke 11 and a lock nut are arranged at the rear end of the valve body 4, an armature 3 controlled by the solenoid to move is arranged in the valve body 4, the front end of the armature 3 is connected with a valve core 6, the valve core 6 can move in the valve sleeve 7 and is communicated with or cuts off a first liquid port 8 and a second liquid port 9 on the valve sleeve 7; when the electromagnetic coil is electrified, under the action of magnetic force, the armature 3 pushes the valve core 6 to open the first liquid port 8 and the second liquid port 9, so that the hydraulic flow in the valve body 4 is controlled, and the armature 3 is provided with an oil guide hole to form a loop in the valve body 4; in order to reduce the response time and dead zone current of the bidirectional cut-off electromagnetic directional valve, the rear end of the armature 3 is provided with an elastic pressure regulating part, the elastic pressure regulating part is arranged in the tail yoke 11 in a penetrating manner, one end of the elastic pressure regulating part is abutted against the tail yoke 11, the other end of the elastic pressure regulating part is abutted against the armature 3, the elastic pressure regulating part is arranged between the tail yoke 11 and the armature 3, the elastic pressure regulating part is in a compression state, when the electromagnetic force is applied to the armature 3, the elastic pressure regulating part is also applied to the armature 3, the thrust applied to the valve core 6 is increased, and the reaction time is shortened; meanwhile, the armature 3 can rub against the inner wall of the valve body 4 when moving, in order to reduce friction force, an insulating bush 2 is arranged between the outer wall of the armature 3 and the inner wall of the valve body 4, the insulating bush 2 is made of non-metal materials, the inner wall is smooth, friction force between the armature and the inner wall of the magnetic core tube is reduced, and hysteresis of the valve is reduced, and in the embodiment, the insulating bush 2 is made of polytetrafluoroethylene.

Specifically, in the embodiment, in order to facilitate processing and installation, the elastic pressure regulating part comprises a pressure regulating rod main body 12, a spring 1 is sleeved at the front end of the pressure regulating rod main body 12, in order to facilitate installation and positioning of the spring 1, a limiting groove 31 for installing the spring 1 is arranged on the armature 3, and the spring 1 has a movement tendency of pushing the armature 3 to move forwards; in order to facilitate the assembly of the pressure regulating rod main body 12 and the tail yoke 11, the pressure regulating rod main body 12 is provided with a limiting boss 121, and the front end of the tail yoke 11 is provided with a limiting groove corresponding to the limiting boss 121; because the elasticity pressure regulating member wears to establish in tail 11 and can axial displacement, in order to improve the leakproofness of elasticity pressure regulating member, seted up ring channel 122 on pressure regulating rod main part 12, install O type sealing washer in the ring channel 122.

In order to facilitate the armature 3 to push the valve core 6, a push rod 5 is connected between the armature 3 and the valve core 6, and in order to avoid the position of the armature 3 from shifting when the push rod 5 is driven to push the valve core 6, so that clamping stagnation occurs, a clamping boss 51 is arranged at the head of the push rod 5, and a clamping groove corresponding to the clamping boss 51 is arranged on the armature 3.

In order to facilitate the rapid return of the valve core 6 after the power-on is finished, a first spring seat 61, a return spring 62 and a second spring seat 63 are sleeved on the valve core 6, a steel wire retainer ring for installing and limiting the first spring seat 61 is arranged on the valve core 6, the front end of the second spring seat 63 is sleeved in the valve sleeve 7, and the return spring 62 is installed between the first spring seat 61 and the second spring seat 63; in order to improve the sealing performance between the valve core 6 and the valve sleeve 7, the second spring seat 63 is sleeved on the valve core 6, the outer wall of the second spring seat is attached to the inner wall of the valve sleeve 7, a first sealing groove 111 is formed between the second spring seat 63 and the valve core 6 and between the second spring seat 63 and the valve sleeve 7, and a first sealing ring is arranged in the first sealing groove 111; on the other hand, in order to improve the sealing performance between the valve body 4 and the valve sleeve 7, a second sealing groove 112 for sealing with the valve body 4 is arranged on the outer wall of the valve sleeve 7, and a second sealing ring is arranged in the second sealing groove 112; meanwhile, a third sealing groove 113 sealed with the valve body 4 is formed in the outer wall of the tail valve 11, a third sealing ring is arranged in the third sealing groove 113, multiple sealing is formed among all the parts, and the overall sealing performance of the bidirectional stop electromagnetic directional valve is improved.

In order to conveniently and manually regulate the pressure of the two-way stop electromagnetic directional valve, a mounting seat 10 is arranged on the valve body 4 in a fit mode through a locking nut, a tail plate 13 is hinged to the mounting seat 10, an elastic pressure regulating piece can be pressed when the tail plate 13 rotates, the elastic pressure regulating piece drives the valve core 6 to move so as to carry out manual pressure regulation, the debugging is convenient, the manual control function can be realized, and the opening and closing of the two-way stop electromagnetic directional valve can be manually controlled under the condition that the electric quantity of operating equipment is exhausted.

When the two-way cut-off electromagnetic directional valve is used, the electromagnetic coil is electrified, and the introduced current is gradually increased from zero to the maximum value, so that the opening area from the first liquid port 8 to the second liquid port 9 is gradually increased from zero to the maximum value; when the valve is closed, the introduced current is gradually reduced to zero from the maximum value, so that the opening area from the first liquid port 8 to the second liquid port 9 is gradually reduced to zero from the maximum value, and the flow rate proportional control of the bidirectional cut-off electromagnetic directional valve is realized.

In a preferred embodiment of the present invention, the bidirectional cut-off electromagnetic directional valve is applied to the descending hydraulic control of an aerial work platform, when the current passing through the electromagnetic coil is zero, the valve core 6 is tightly attached to the valve sleeve 7 by the sealing surface under the action of the spring 1, the first fluid port 8 is cut off and not communicated with the second fluid port 9, the second fluid port 9 is also cut off and not communicated with the first fluid port 8, and the aerial work platform can stably stop at the high altitude; after the aerial work is finished, the current passing through the electromagnetic coil is gradually increased from zero to the maximum value, the opening area from the first liquid port 8 to the second liquid port 9 is gradually increased from zero, the flow of the passing hydraulic oil is gradually increased from zero, and then the descending speed of the aerial work platform is gradually increased from zero and is kept after the maximum descending speed is reached; when the aerial work platform descends to be close to the ground, the current passing through the electromagnetic coil is gradually reduced to zero from the maximum value, the opening area from the first liquid port 8 to the second liquid port 9 is gradually reduced to zero from the maximum value, the flow of the passing hydraulic oil is also reduced to zero from the maximum value, and further the descending speed of the aerial work platform is gradually reduced to zero from the fastest speed.

It will be understood by those skilled in the art that the foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the invention to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

Claims

1. A two-way stop electromagnetic directional valve is characterized in that: the valve comprises a valve body (4), wherein an electromagnetic coil is sleeved outside the valve body (4), a valve sleeve (7) is arranged at the front end of the valve body (4), a tail yoke (11) and a locking nut are arranged at the rear end of the valve body (4), an armature (3) controlled to move by the electromagnetic coil is arranged in the valve body (4), a valve core (6) is connected to the front end of the armature (3), and the valve core (6) can move in the valve sleeve (7) and is communicated with or separated from a first liquid port (8) and a second liquid port (9) in the valve sleeve (7); the rear end of armature (3) is equipped with elasticity pressure regulating spare, elasticity pressure regulating spare one end butt in tail yoke (11), elasticity pressure regulating spare other end butt in armature (3), armature (3) can the valve barrel (7) internal motion.

2. The bidirectional blocking electromagnetic directional valve of claim 1, wherein: and an insulating bush (2) is arranged between the outer wall of the armature (3) and the inner wall of the valve body (4).

3. The bidirectional blocking electromagnetic directional valve of claim 1, wherein: the elastic pressure regulating piece comprises a pressure regulating rod main body (12), a spring (1) is sleeved at the front end of the pressure regulating rod main body (12), a limiting groove used for installation of the spring (1) is formed in the armature (3), and the spring (1) pushes the armature (3) to move forwards.

4. The bidirectional blocking electromagnetic directional valve of claim 3, wherein: the pressure regulating rod is characterized in that a limiting boss (121) is arranged on the pressure regulating rod body (12), and a limiting groove corresponding to the limiting boss (121) is arranged at the front end of the tail yoke (11).

5. The bidirectional cutoff electromagnetic directional control valve as recited in claim 3 wherein; an annular groove (122) is formed in the pressure regulating rod main body (12), and an O-shaped sealing ring is installed in the annular groove (122).

6. The bidirectional blocking electromagnetic directional valve of claim 1, wherein: a push rod (5) is connected between the armature (3) and the valve core (6), a clamping boss (51) is arranged at the head of the push rod (5), and a clamping groove corresponding to the clamping boss (51) is formed in the armature (3).

7. The bidirectional cutoff electromagnetic directional control valve of claim 1, characterized in that: the valve core (6) is sleeved with a first spring seat (61), a return spring (62) and a second spring seat (63), and the return spring (62) is located between the first spring seat (61) and the second spring seat (63).

8. The bidirectional blocking electromagnetic directional valve of claim 7, wherein: second spring holder (63) cover is established on case (6) and the outer wall with valve barrel (7) inner wall laminating, second spring holder (63) with case (6) form first seal groove (111) between valve barrel (7), be equipped with first sealing washer in first seal groove (111).

9. The bidirectional cutoff electromagnetic directional control valve of claim 1, characterized in that: a second sealing groove (112) used for sealing with the valve body (4) is formed in the valve sleeve (7), and a second sealing ring is arranged in the second sealing groove (112); the tail yoke (11) is provided with a third sealing groove (113) sealed with the valve body (4), and a third sealing ring is arranged in the third sealing groove (113).

10. The bidirectional blocking electromagnetic directional valve of claim 1, wherein: the valve body (4) is attached to the locking nut and is provided with a mounting seat (10), a tail plate (13) is hinged to the mounting seat (10), and the elastic pressure regulating piece can be pressed when the tail plate (13) rotates.