CN214092504U

CN214092504U - Electromagnetic seat valve

Info

Publication number: CN214092504U
Application number: CN202023205518.9U
Authority: CN
Inventors: 朱剑根; 曹力; 马欲宏; 谷文平
Original assignee: Shanghai Lixin Hydraulics Co ltd
Current assignee: Shanghai Lixin Hydraulics Co ltd
Priority date: 2020-12-27
Filing date: 2020-12-27
Publication date: 2021-08-31
Anticipated expiration: 2030-12-27

Abstract

The utility model discloses an electromagnetic seat valve, which comprises a driving body and a valve body; the valve body is provided with a valve channel, the inner side wall of the valve channel is sequentially provided with a first flow channel, a second flow channel and a third flow channel along the direction of the valve channel, and the first flow channel, the second flow channel and the third flow channel are all communicated with the valve channel; the valve core, the ejector rod and the spring are sequentially arranged in the valve channel in an abutting mode, and when the valve is powered on, the valve core abuts against the driving body; the valve body is provided with a first valve seat and a second valve seat in the valve passage, the first valve seat is provided with a first abutting hole, the second valve seat is provided with a second abutting hole, one end of the valve body fixedly connected with the ejector rod is provided with a sealing connector, and the sealing connector is positioned between the first valve seat and the second valve seat; the contact between the sealing connector and the first contact hole and the contact between the sealing connector and the second contact hole are line contact, and the pattern formed by the contact lines is in a closed ring shape. The utility model provides an electromagnetism seat valve has the advantage that the internal leakage is less, can the exclusive use, and its practicality is good, easily popularizes and applies, has great value.

Description

Electromagnetic seat valve

Technical Field

The utility model relates to a hydraulic control valve, more specifically the utility model relates to an electromagnetic seat valve.

Background

In modern mechanical equipment in the fields of engineering machinery, construction, metallurgy, machine tools, industry and the like, a large number of hydraulic bearing systems are applied, wherein a hydraulic control valve is a key hydraulic component of the systems, and the performance of the hydraulic bearing systems is directly influenced by the performance of the whole machine.

In some occasions, for example the pressurize process of press, the internal leakage that needs the hydraulic control valve is as little as possible to guarantee longer pressurize time, ordinary electromagnetic hydraulic control valve, the internal leakage that cooperation clearance caused is great, and the exclusive use can't satisfy the demand, needs to adopt other hydrovalves cooperations such as liquid accuse check valve to use.

SUMMERY OF THE UTILITY MODEL

To solve the above technical problem, an object of the present invention is to provide an electromagnetic seat valve with small internal leakage and capable of being used alone.

In order to achieve the above purpose, the utility model provides a following technical scheme: an electromagnetic seat valve comprises a driving body and a valve body;

the valve body is provided with a valve channel, a first flow channel, a second flow channel and a third flow channel are sequentially arranged on the inner side wall of the valve channel along the direction of the valve channel, the first flow channel, the second flow channel and the third flow channel are all communicated with the valve channel, the third flow channel is positioned at one end, close to the driving body, of the valve channel, and one end, far away from the driving body, of the valve channel is closed;

the valve body is provided with a first oil port communicated with the first flow channel, a second oil port communicated with the second flow channel and a third oil port communicated with the third flow channel;

the valve core, the ejector rod and the spring are sequentially arranged in the valve channel in an abutting mode, and when the valve is powered on, the valve core abuts against the driving body;

the valve body is provided with a first valve seat and a second valve seat in the valve passage, the first valve seat and the second valve seat are respectively fixed with the inner wall of the valve passage in a sealing manner, the first valve seat is positioned between the first flow passage and the second flow passage, and the second valve seat is positioned between the second flow passage and the third flow passage;

a first abutting hole is formed in the first valve seat, a second abutting hole is formed in the second valve seat, a sealing connector is arranged at one end, fixedly connected with the ejector rod, of the valve body, and the sealing connector is located between the first valve seat and the second valve seat;

the interference between the sealing connector and the first abutting hole and the interference between the sealing connector and the second abutting hole are line interference, and the pattern formed by the line interference is in a closed ring shape.

Preferably, the first abutting hole is a circular hole, one side of the sealing connector facing the first abutting hole is hemispherical, and the diameter of the hemisphere is greater than the inner diameter of the first abutting hole.

Preferably, the first abutting hole is a circular hole, one side of the sealing connector facing the first abutting hole is a right circular cone, and the diameter of the bottom surface of the right circular cone is larger than the inner diameter of the first abutting hole.

Preferably, the driving body is provided with a push rod for driving the valve core to move along the valve channel, the end surface of the valve core facing the driving body is inwards recessed with a driving groove, and the push rod slides in the driving groove.

More preferably, the bottom of the driving groove is an inwardly recessed conical surface, a force-equalizing ball is arranged in the driving groove, and a contact line between the force-equalizing ball and the conical surface is a coaxial closed circle.

Preferably, a balance flow passage communicated with the valve passage is arranged in the valve passage, the balance flow passage is communicated with the first oil port, the balance flow passage is located on one side of the third flow passage, which is far away from the second flow passage, and the third flow passage and the balance flow passage are not communicated with each other.

More preferably, a guide separation sleeve is clamped between the valve core and the valve channel, the guide separation sleeve is fixedly and hermetically connected with the valve channel, and the guide separation sleeve is in sealing sliding fit with the valve core.

Further, the guide blocking sleeve is positioned between the third flow channel and the balance flow channel.

Preferably, the sealing manner in the sealing fixing manner is sealing by a sealing ring.

To sum up, the utility model discloses following beneficial effect has:

1. the inner leakage is reduced by adopting a cone sealing structure, wherein the cone sealing structure means that the collision of two matched sealing pieces is line collision, and the collision line forms a closed circle, so that the sealing effect formed by the line collision is better compared with the sealing formed by the surface collision; specifically, first butt hole and second butt hole are the circular port, and right case is the spheroid, and when right case right side and first butt hole butt, the conflict position of right case and first disk seat is in first butt hole border department, thereby the conflict point forms a closed circle and realizes the shutoff, when right case left side and second butt hole butt, the conflict position of right case and second valve seat is in second butt hole border department, thereby the conflict point forms a closed circle and realizes the shutoff.

2. The uniform force ball is arranged in the driving groove, the uniform force ball can roll in the driving groove, meanwhile, the bottom of the driving groove is provided with an inwards concave conical surface, the uniform force ball is abutted to the conical surface line, the contact line forms a closed circular ring, and when the push rod pushes the valve core to move through the steel ball, the uniform force ball can uniformly disperse the inner part of the valve core to the closed circular ring, so that the problem that the abutting point of the push rod and the bottom of the driving groove deviates from the axis is solved.

3. Through setting up the direction and hindering the spacer bush, each other not intercommunicate between third flow channel and the balanced runner, hydraulic oil in the first hydraulic fluid port flows to the left end face of case through balanced runner and gives the case thrust of a rightwards, and this thrust has offset and has conducted the runner and act on the case rightwards power for when electro-magnet driven valve body moves left, only need overcome the elasticity of spring can, thereby reduced the power demand to the electro-magnet, the effect that the end portion was led still plays to the case is hindered to the direction simultaneously.

Drawings

FIG. 1 is an axial cross-sectional schematic view of a solenoid seat valve in accordance with an embodiment;

FIG. 2 is a schematic diagram showing the positional relationship among the valve element, the lift pin, and the valve seat in the present embodiment;

FIG. 3 is a schematic structural view of each flow passage in the valve passage in the present embodiment;

FIG. 4 is a view of the valve body of this embodiment in the direction A shown in FIG. 3;

FIG. 5 is a schematic view illustrating the communication between the first oil port and the first flow passage and the balance flow passage in the valve body according to the present embodiment;

FIG. 6 is a schematic view of the third port in the valve body communicating with the third flow passage in the present embodiment;

FIG. 7 is a cross-sectional view of the spacer ring in the present embodiment;

fig. 8 is a sectional view of the large cage in this embodiment.

Reference numerals:

a. a drive body; b. a valve body; c. a valve way; d. a valve core; e. a seal ring; f. a flow through groove;

1. a rear cover; 2. a push rod; 3. a left valve core; 4. a middle valve core; 5. a right valve core; 6. a top rod; 7. a spring; 8. a force balancing ball; 9. a buffer block; 10. a guide sleeve; 11. a pin shaft; 12. a first flow passage; 13. a second flow passage; 14. a third flow path; 15. a first oil port; 16. a second oil port; 17. a third oil port; 18. a first valve seat; 19. a second valve seat; 20. a balance flow channel; 21. a guide barrier sleeve; 22. a small spacing ring; 23. a large spacing ring; 24. a first large space ring; 25. a small space ring; 26. a second large space ring; 27. a first blind opening; 28. a second blind hole;

1a, a spring groove; 3a, a driving groove; 6a, positioning holes; 18a, a first abutting hole; 19a, a second abutting hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings of the embodiments of the present application. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the application without any inventive step, are within the scope of protection of the application.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The use of the terms "a" or "an" and the like in the description and in the claims of the present application do not denote a limitation of quantity, but rather denote the presence of at least one.

In the description of the present specification and claims, the terms "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present application and simplifying the description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

Specific embodiments of the present application will now be described with reference to the accompanying drawings.

Fig. 1 to 8 show a specific embodiment of this application solenoid seat valve, and it includes driving body a and valve body b, is provided with connecting portion on the driving body a, and valve body b is whole to be the cuboid, and valve way c has been seted up to its axis department is coaxial, and both ends all are provided with the internal thread about valve way c, and driving body a passes through connecting portion and valve way c threaded connection to be fixed in valve body b left side, and valve body b closes valve way c right-hand member opening through setting up back lid 1 with valve way c threaded connection at valve way c right-hand member.

The driving body a is internally provided with an electromagnet and a push rod 2, the connecting part is axially provided with a channel for the push rod 2 to extend out, the valve body b is sequentially and coaxially provided with a valve core d, an ejector rod 6 and a spring 7 from left to right in the valve channel c, the push rod 2 and the spring 7 are positioned at two ends of the valve core d and the ejector rod 6, and the valve core d and the ejector rod 6 are driven by the push rod 2 and the spring 7 to move left and right along the valve channel c.

Valve core d is along its length direction from left to right respectively define as left valve core 3, well valve core 4 and right valve core 5, and left valve core 3 is inwards sunken to be formed with drive groove 3a towards the terminal surface of push rod 2, and push rod 2 is reciprocating motion in drive groove 3a, when push rod 2 and drive groove 3a tank bottom offset axis of contact, the in-process that push rod 2 pushed valve core d can make between valve core d and the valve way c circumference atress uneven to the easy scheduling problem of damaging of valve core d and valve way c appears.

In order to solve the problem, in this embodiment, the force-equalizing ball 8 is disposed in the driving groove 3a, the force-equalizing ball 8 can roll in the driving groove 3a, meanwhile, the bottom of the driving groove 3a is set to be an inwardly concave conical surface, the force-equalizing ball 8 abuts against the conical surface, the contact line forms a closed ring, when the push rod 2 pushes the valve core d to move through the steel ball, the force-equalizing ball 8 can uniformly disperse the force received by the push rod to the closed ring, so as to reduce the problem that the push rod 2 and the bottom of the driving groove 3a abut against the contact point and deviate from the axis, more preferably, in order to reduce the damage caused by collision between the push rod 2 and the force-equalizing ball 8, the buffer block 9 made of an elastic material is disposed between the push rod and the force-equalizing ball 8.

The so-called "sealed connector" is right valve core 5, under the effect of spring 7, right valve core 5 and ejector pin 6 remain conflict throughout, in this embodiment, right valve core 5 inwards caves into a slot towards a side end face axis of

ejector pin

6, 6 left ends of ejector pin are pegged graft in the slot, this mode makes conflict position between them lie in the axis throughout, simultaneously in order to make 6 right-hand members of ejector pin coaxial all the time, be provided with the uide bushing 10 with the coaxial setting of valve path c on the 1 left end face of back lid, the uide bushing 10 cover is established at 6 right-hand members of ejector pin, ejector pin 6 and uide bushing 10 are along the axial cooperation of sliding.

The end face of the rear cover 1 facing the ejector rod 6 is inwards provided with a spring groove 1a used for placing a spring 7 along the axis, the right end face of the ejector rod 6 is fed into the spring groove 1a to be abutted against the spring 7, the force given to the ejector rod 6 by the spring 7 is not uniform, the ejector rod 6 is easy to receive a radial offset component force along the ejector rod, in order to solve the problem, a positioning groove is coaxially formed in the bottom of the spring groove 1a, a pin shaft 11 is fixedly inserted into the positioning groove, the end face of the ejector rod 6 facing the pin shaft 11 is inwards sunken with a positioning hole 6a matched with the pin shaft 11, when the ejector rod 6 moves left and right, the pin shaft 11 slides in the positioning hole 6a, and the spring 7 is sleeved outside the pin shaft 11.

A first flow passage 12, a second flow passage 13 and a third flow passage 14 are coaxially arranged in the inner side wall of the valve passage c from right to left in sequence along the direction of the valve passage c, in this embodiment, the second flow passage 13 is substantially the part of the valve passage c between the first valve seat 18 and the second valve seat 19 in the axial direction, the first flow passage 12, the second flow passage 13 and the third flow passage 14 are all communicated with the valve passage c, and the outer side surface of the valve body b is sequentially provided with a first oil port 15, a second oil port 16 and a third oil port 17 from right to left, wherein the first oil port 15 penetrates through the valve body b to be communicated with the first flow passage 12, the second oil port 16 penetrates through the valve body b to be communicated with the second flow passage 13, and the third oil port 17 penetrates through the valve body b to be communicated with the third flow passage 14; in addition, the valve body b is also provided with a first blind port 27 and a second blind port 28 which are used for plugging oil ports at corresponding positions on the valve block contacted with the valve body b.

The valve body b is coaxially provided with a first valve seat 18 and a second valve seat 19 in a valve passage c, the first valve seat 18 and the second valve seat 19 are respectively fixed with the inner wall of the valve passage c in a sealing manner, a first abutting hole 18a is formed in the axle center of the first valve seat 18, a second abutting hole 19a is formed in the axle center of the second valve seat 19, in the axial direction, the first valve seat 18 is located between the first flow passage 12 and the second flow passage 13, the second valve seat 19 is located between the second flow passage 13 and the third flow passage 14, the middle valve core 4 passes through the second abutting hole 19a, the right valve core 5 is located between the first valve seat 18 and the second valve seat 19, and the right valve core 5 is respectively abutted with the first abutting hole 18a and the second abutting hole 19a to seal the switching oil passage under the driving of the push rod 2 and the push rod 6.

According to the traditional electromagnetic seat valve in the background art, the plugging is realized through surface interference, and the problem that a completely closed surface cannot be formed easily occurs in a fit clearance exists, so that the internal leakage is large in practical use.

In order to solve the problem, in the embodiment, a "cone sealing structure" is adopted to reduce the internal leakage, and the "cone sealing structure" means that the collision of two matched sealing elements is line collision, and the collision line forms a closed circle, so that the sealing effect formed by the line collision is better compared with the sealing formed by the surface collision; specifically, the first abutting hole 18a and the second abutting hole 19a are circular holes, the right spool 5 is a sphere, when the right side of the right spool 5 abuts against the first abutting hole 18a, the abutting position of the right spool 5 and the first valve seat 18 is at the edge of the first abutting hole 18a, the abutting point forms a closed circle to realize plugging, when the left side of the right spool 5 abuts against the second abutting hole 19a, the abutting position of the right spool 5 and the second valve seat 19 is at the edge of the second abutting hole 19a, the abutting point forms a closed circle to realize plugging, in a preferred embodiment, the right spool 5 may be a cube formed by two coaxial right conical bottom surfaces in an abutting manner.

First hydraulic fluid port 15, second hydraulic fluid port 16, third hydraulic fluid port 17 are two-way hydraulic fluid port, all can realize the business turn over of outside hydraulic oil promptly, and in this embodiment, first hydraulic fluid port 15, second hydraulic fluid port 16 are respectively as outage oil inlet and circular telegram oil inlet use, and the hydraulic fluid port is made to third hydraulic fluid port 17 and is used, and the electromagnetism seat valve shifts the route between the above-mentioned hydraulic fluid port through electromagnetism drive valve core d removes the shutoff butt hole in the valve way c:

when the power is off, the electromagnet does not apply a force to the valve core d rightwards through the push rod 2, but the spring 7 always applies a force to the valve core d leftwards, under the action of the spring 7, the push rod 6 drives the valve core d to move leftwards, the ball head on the left side of the right valve core 5 is in line contact with the end surface of the second abutting hole 19a for sealing, at the moment, the first flow passage 12 is communicated with the second flow passage 13 through a gap between the push rod 6 and the first abutting hole 18a, namely, the first oil port 15 is communicated with the second oil port 16 at the moment, and external hydraulic oil flows out of the first oil port 15 through the first flow passage 12, the gap between the push rod 6 and the first abutting hole 18a, the second flow passage 13 and finally flows out of the second oil port 16;

when the electric valve is electrified, the electromagnet drives the push rod 2 to move rightwards, the acting force of the electromagnet is larger than the force which is applied to the valve core d leftwards by the spring 7, the push rod 2 drives the valve core d and the ejector rod 6 to move rightwards through the buffer block 9 and the force equalizing ball 8, the ball head on the right side of the right valve core 5 is in line contact and sealing with the end surface of the first abutting hole 18a, at the moment, the third flow passage 14 is communicated with the second flow passage 13 through a gap between the middle valve core 4 and the second abutting hole 19a, namely, the third oil port 17 is communicated with the second oil port 16 at the moment, and external hydraulic oil flows out of the second flow passage 13 from the third oil port 17 through the third flow passage 14, the gap between the middle valve core 4 and the second abutting hole 19a and finally from the second oil port 16.

From the above description it can be seen that when de-energized, the right valve element 5 is subjected not only to the force from the spring 7 to the right, but also to the hydraulic force from the right conducting channel, which is generally greater, and that for energizing the push rod 2 can push the valve element d to the left, which places a higher demand on the power of the electromagnet.

In order to solve the problem, in the present embodiment, a balance flow passage 20 communicating with the valve passage c is provided in the valve passage c, the balance flow passage 20 communicates with the first oil port 15, the balance flow passage 20 is located on a side of the third flow passage 14 away from the second flow passage 13, and the third flow passage 14 and the balance flow passage 20 do not communicate with each other.

In a preferred embodiment, the third flow passage 14 and the balance flow passage 20 are not communicated with each other by interposing a guide spacer 21 between the valve core d and the valve passage c, specifically, in a radial direction, the guide spacer 21 is interposed between the valve core d and the valve passage c, in an axial direction, the guide spacer 21 is located between the third flow passage 14 and the balance flow passage 20, the guide spacer 21 is fixedly and hermetically connected with the valve passage c, and the guide spacer 21 is in sealed sliding fit with the valve core d.

According to the arrangement, due to the existence of the guide blocking sleeve 21, the third flow passage 14 and the balanced flow passage 20 are not communicated with each other, hydraulic oil in the first oil port 15 flows to the left end face of the valve core d through the balanced flow passage 20 to provide a rightward thrust for the valve core d, and the rightward thrust counteracts the rightward force applied to the valve core d by the conductive flow passage, so that when the electromagnet driving valve body b moves leftwards, only the elastic force of the spring 7 needs to be overcome, the power requirement on the electromagnet is reduced, and meanwhile, the guide blocking sleeve 21 also plays a role in guiding the end part of the valve core d.

In the above description of the present embodiment, there are a plurality of sealing manners that are not specifically disclosed, and as described herein collectively, the sealing manners in the present embodiment are all sealed in a manner of sandwiching the sealing ring e between the two sealing surfaces, except for the line butt seal, and more preferably, a receiving groove for receiving the sealing ring e is provided on one of the sealing surfaces to fix the sealing ring e.

Meanwhile, in the present embodiment, the limiting of the valve element 4 at the axial left end is realized by the small limiting ring 22, the positioning of the guide spacer 21 in the axial direction is realized by the large limiting ring 23 and the first large spacer ring 24, the positioning of the first valve seat 18 in the axial direction is realized by the first large spacer ring 24 and the small spacer ring 25, the positioning of the second valve seat 19 in the axial direction is realized by the small spacer ring 25 and the second large spacer ring 26, the positioning of the guide sleeve 10 in the axial direction is realized by the second large spacer ring 26 and the left end face of the rear cover 1, and the large spacer ring and the small spacer ring 25 are both provided with the through-flow grooves f for the medium to pass through, so as not to hinder the medium from flowing through.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. An electromagnetic seat valve comprises a driving body and a valve body; the method is characterized in that:

2. A base valve as defined in claim 1, wherein the first hole is a circular hole, and a side of the sealing connector facing the first hole is a hemisphere, the hemisphere having a diameter larger than an inner diameter of the first hole.

3. A base valve as defined in claim 1, wherein the first abutting hole is a circular hole, and a side of the sealing connector facing the first abutting hole is a right circular cone, and a diameter of a bottom surface of the right circular cone is larger than an inner diameter of the first abutting hole.

4. A solenoid seat valve according to claim 1, wherein said driving body is provided with a push rod for driving said spool to move along said valve path, said end surface of said spool facing said driving body is recessed inwardly with a driving groove, and said push rod slides in said driving groove.

5. The electromagnetic seat valve according to claim 4, wherein the bottom of the driving groove is an inwardly concave conical surface, a force equalizing ball is arranged in the driving groove, and the contact line of the force equalizing ball and the conical surface is a coaxial closed circle.

6. A solenoid valve according to claim 1, wherein a balance flow passage is disposed in the valve passage and communicates with the valve passage, the balance flow passage communicates with the first port, the balance flow passage is disposed on a side of the third flow passage away from the second flow passage, and the third flow passage and the balance flow passage do not communicate with each other.

7. The electromagnetic seat valve according to claim 6, characterized in that a guide blocking sleeve is clamped between the valve core and the valve way, the guide blocking sleeve is fixed on the valve way in a sealing manner, and the guide blocking sleeve is in sliding fit with the valve core in a sealing manner.

8. A solenoid seat valve according to claim 7, wherein said pilot spacer sleeve is positioned between said third flow path and said balance flow path.

9. A base valve according to any one of claims 1 to 8, wherein the sealing means in the sealing and securing means is a gasket seal.