CN212272696U - Electro-hydraulic valve reversing anti-impact structure - Google Patents
Electro-hydraulic valve reversing anti-impact structure Download PDFInfo
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- CN212272696U CN212272696U CN202021585840.6U CN202021585840U CN212272696U CN 212272696 U CN212272696 U CN 212272696U CN 202021585840 U CN202021585840 U CN 202021585840U CN 212272696 U CN212272696 U CN 212272696U
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Abstract
The utility model provides a reversing anti-impact structure of an electro-hydraulic valve, belonging to the field of electro-hydraulic valve manufacturing; the utility model discloses a: a valve body; the valve body is provided with a flow guide hole and an oil outlet butted with the pilot valve, and a pressure reduction cavity is arranged in the valve body; a slidable valve core is arranged in the pressure reduction cavity, a pressure regulating screw rod is arranged at one end of the pressure reduction cavity, and a pre-tightened pressure spring is arranged between the pressure regulating screw rod and the valve core; two ends of the valve core are respectively used for radially plugging the flow guide hole and the oil outlet; the valve core compresses the pressure spring to slide under the action of hydraulic oil, so that the flow guide hole is connected with the oil outlet. The utility model discloses a set up slidable case on the water conservancy diversion hole, can guarantee that the high-pressure oil that surpasss the threshold value gets into the oil-out to play the effect of decompression, can effectual promotion pilot valve motion's stability, strengthened system safety, reduced the degree of difficulty that the valve body was reformed transform.
Description
Technical Field
The utility model relates to an electro-hydraulic valve manufacturing technology especially relates to an electro-hydraulic valve switching-over protecting against shock structure, belongs to valve manufacturing technical field.
Background
The electro-hydraulic directional valve is mainly used in a hydraulic system with the flow rate exceeding the normal working allowable range of the electromagnetic directional valve, and is used for controlling the action of an executing element or controlling the flow direction of oil.
In the prior art, the electro-hydraulic directional control valve is divided into an internal control type (control oil is taken from a P port of a main oil way) and an external control type (control oil is additionally provided with an independent oil source) according to the source of pressure oil of a pilot valve of the electro-hydraulic directional control valve, because the electro-hydraulic directional control valve is mostly used in a high-pressure and high-flow hydraulic control system, the directional impact is large when the internal control type is used, and the stability and the safety of the whole hydraulic system are influenced.
Therefore, an external control mode is often necessary, and an independent oil source with lower pressure is additionally arranged. However, this requires additional power, control and accessories, which results in a cost increase and a more complex system.
SUMMERY OF THE UTILITY MODEL
The utility model provides a new electrohydraulic valve switching-over protecting against shock structure sets up pressure relief device through the export at the main oil circuit to can balance the oil pressure of main oil circuit export, with the too big technical problem of pilot valve switching-over impact force that the main oil circuit links to each other among the solution prior art.
The utility model discloses electrohydraulic valve switching-over protecting against shock structure, include: a valve body; the valve body is provided with a flow guide hole and an oil outlet butted with the pilot valve, and a pressure reduction cavity is arranged in the valve body;
a slidable valve core is arranged in the pressure reduction cavity, a pressure regulating screw rod is arranged at one end of the pressure reduction cavity, and a pre-tightened pressure spring is arranged between the pressure regulating screw rod and the valve core;
two ends of the valve core are respectively used for radially plugging the flow guide hole and the oil outlet; the valve core compresses the pressure spring to slide under the action of hydraulic oil, so that the flow guide hole is connected with the oil outlet.
The electro-hydraulic valve reversing impact-resistant structure comprises a valve body, a valve rod, a pressure regulating screw and a pressure regulating screw rod, wherein the valve body is internally provided with the pressure regulating cavity;
the valve body is further provided with an oil return port and an oil return cavity, and the oil return port is connected with the oil return cavity through the pressure regulating cavity.
The electro-hydraulic valve reversing impact-resistant structure comprises a valve core, wherein the valve core is provided with a throttling hole, and the throttling hole is used for communicating the diversion hole with the oil outlet.
The electro-hydraulic valve reversing impact-resistant structure comprises a valve core, a valve rod, a connecting rod, a spring and a spring, wherein the valve core is provided with a plurality of cylinders;
the two cylinders are respectively positioned at two ends of the pressure reduction cavity and respectively correspond to the flow guide hole and the oil outlet so as to seal the flow guide hole and the oil outlet.
The electro-hydraulic valve reversing impact-resistant structure comprises a pressure regulating screw, a pressure regulating screw and a spring, wherein the pressure regulating screw is arranged at the end part of the pressure regulating screw; a nut is further installed on the outer side of the valve body; the screwing screw is arranged in the nut.
The electro-hydraulic valve reversing impact-resistant structure comprises a guide hole, wherein the front end of the guide hole is an inclined oil guide channel, and the section of the guide channel is gradually reduced along with the oil guide direction.
The electro-hydraulic valve reversing impact-resistant structure is characterized in that the pressure regulating cavity is connected with the pressure reducing cavity, and a communication hole is formed between the pressure regulating cavity and the pressure reducing cavity; the cylinder at one end of the valve core is positioned in the communicating hole; the valve body slides to open the communication hole.
The electro-hydraulic valve reversing impact-resistant structure comprises a valve body, wherein the valve body is provided with an oil return port and an oil outlet;
the top of the valve body is also provided with two guide holes; the upper part of the valve body is provided with a pilot electromagnetic valve; the pilot electromagnetic valve is connected with the valve body through the oil outlet, the oil return port and the guide hole.
The utility model discloses in, through set up the slidable case on the water conservancy diversion hole, can guarantee that the high-pressure oil that surpasss the threshold value gets into the oil-out to play the effect of decompression, can effectual promotion pilot valve motion's stability, strengthened system safety, reduced the degree of difficulty that the valve body was reformed transform.
Drawings
Fig. 1 is a side structure view of a reversing impact-proof structure of an electrohydraulic valve according to an embodiment of the present invention;
FIG. 2 is a schematic view of the pressure holding state at M in FIG. 1;
FIG. 3 is a schematic diagram of the pressure cutback condition at M in FIG. 1.
Detailed Description
Electro-hydraulic valve switching-over protecting against shock structure can adopt following material to make, and be not limited to following material, for example: cast steel, a cylindrical spring, an electromagnetic valve, a ceramic valve core, a sealing ring, an oil guide channel, a valve interface and the like.
Fig. 1 is a side structure view of a reversing impact-proof structure of an electrohydraulic valve according to an embodiment of the present invention; and in conjunction with figures 2 and 3.
The utility model discloses electrohydraulic valve switching-over protecting against shock structure includes: a valve body 1; the valve body 1 is provided with a flow guide hole 11 and an oil outlet 2 butted with a pilot valve, and a pressure reduction cavity is arranged in the valve body 1; the pressure reduction cavity is used for accommodating the pressure reduction device.
A slidable valve core 9 is arranged in the pressure reduction cavity, one end of the pressure reduction cavity is provided with a pressure regulating screw rod 4, and a pre-tightened pressure spring 41 is arranged between the pressure regulating screw rod 4 and the valve core 9; generally, the pressure spring 41 has a pressure adjusting screw 4 and a gasket 42 at its two ends, and the gasket 42 is used to contact with the valve element 9.
Two ends of the valve core 9 are respectively used for radially plugging the flow guide hole 11 and the oil outlet 2; the valve core 9 compresses the pressure spring 41 to slide under the action of hydraulic oil, so that the flow guide hole 11 is connected with the oil outlet 2.
In general, a pressure regulating cavity is further arranged in the valve body 1, and the pressure regulating screw rod 4 is arranged in the pressure regulating cavity; namely, the pressure regulating cavity can slide in order to regulate the pretightening force of the pressure spring, thereby adapting to the working conditions of different pressures.
The valve body 1 is further provided with an oil return port 3 and an oil return cavity 12, and the oil return port 3 is connected with the oil return cavity 12 through the pressure regulating cavity. The oil return chamber 12 is used for receiving pressure oil discharged by the pilot valve.
In the electrohydraulic valve reversing impact-proof structure of the present embodiment, the valve core 9 is provided with a throttle hole 90, and the throttle hole 90 is used for communicating the diversion hole and the oil outlet.
The utility model discloses as follows in the course of the work:
when the pressure-reducing valve works, the pressure-regulating screw rod is firstly regulated, so that the pressure threshold value of pressure reduction is regulated; the guide oil flowing to the pilot valve flows into the oil outlet 2 from the main pressure cavity of the oil guide hole 11, then flows into the oil outlet 2 rightwards through the central throttle hole of the valve core, when the pressure reaches a set value, the valve core 9 overcomes the preset elastic force of the pressure spring 41 to push the valve core 9 to move leftwards under the guide pressure pushing force, when a balance point is reached, the main pressure cavity of the oil guide hole 11 and the oil outlet 2 are divided into two chambers which are not communicated by the shoulder of the valve core 3, and at this time, no high-pressure oil flows into the oil outlet 2.
When the pressure thrust of the oil outlet 2 is lower than the set elastic force value of the overcome pressure spring 41, the pressure spring 41 can push the valve core 9 to move rightwards, and the oil guide hole 11 and the oil outlet 2 are instantly communicated for oil supplement (pressure supplement state) to ensure the pressure balance to be constant.
When the instantaneous pressure of the oil outlet subjected to interference is higher than the preset value, the valve core 9 is displaced leftwards to break a balance point, the oil outlet is communicated with the pressure regulating cavity at the moment, and the action of instantaneous overflow and pressure regulation is carried out, so that the constant pressure is ensured.
The pressure at the inlet (oil outlet 2) of the pilot valve is ensured to be adjustable and stable through the steps, and under the ordinary condition, no matter the internal control or external control type electro-hydraulic reversing valve, the lower pilot pressure oil can push the hydraulic main valve core to be smoothly switched. If the pressure is too high, larger hydraulic impact force can be caused, the service life of the whole hydraulic system control and the stability of matched equipment are influenced, and therefore the pressure of the guide oil is controlled to be of great importance for the stable switching of the electro-hydraulic valve.
In the electro-hydraulic valve reversing impact-resistant structure of the embodiment, two ends of the valve core 9 are both cylinders, and a connecting rod is arranged between the two cylinders; the two cylinders are respectively positioned at two ends of the pressure reduction cavity and respectively correspond to the flow guide hole 11 and the oil outlet 2 so as to seal the flow guide hole 11 and the oil outlet 2.
In the electro-hydraulic valve reversing impact-resistant structure of the embodiment, a screwing screw 40 is arranged at the end part of the pressure regulating screw rod 4; a nut 5 is also arranged on the outer side of the valve body 1; the tightening screw 40 is mounted in the nut 5.
In the use process, the nut 5 is opened, and the pressure threshold between the pressure regulating screw rod 4 and the pressure spring 41 can be adjusted by screwing the screw 40.
In the electro-hydraulic valve reversing impact-resistant structure of the embodiment, the front end of the flow guide hole 11 is an inclined oil guide channel 10, and the section of the flow guide channel 10 is gradually reduced along with the oil guide direction.
In the electro-hydraulic valve reversing impact-resistant structure of the embodiment, the pressure regulating cavity is connected with the pressure reducing cavity, and a communication hole is formed between the pressure regulating cavity and the pressure reducing cavity; the cylinder at one end of the valve core is positioned in the communicating hole; the valve body slides to open the communication hole.
In the reversing impact-proof structure of the electrohydraulic valve in the embodiment, the oil return port 3 and the oil outlet 2 are both positioned at the top of the valve body 1; to facilitate installation of the pilot valve.
The top of the valve body 1 is also provided with two guide holes (AB in the figure); the upper part of the valve body 1 is provided with a pilot electromagnetic valve; the pilot electromagnetic valve is connected with the valve body 1 through the oil outlet 2, the oil return port 3 and the guide hole.
The utility model discloses in, through set up the slidable case on the water conservancy diversion hole, can guarantee that the high-pressure oil that surpasss the threshold value gets into the oil-out to play the effect of decompression, can effectual promotion pilot valve motion's stability, strengthened system safety, reduced the degree of difficulty that the valve body was reformed transform.
The utility model discloses a need not independently control the oil source outward, do not increase extra valves, do not basically change the pressure of valve body outward appearance, volume and carry out effectual adjustable control to the pilot valve under. The impact force of pilot control pressure oil on two sides of the hydraulic main valve is effectively reduced, and the noise and the impact on the valve body during reversing switching are reduced. The service life of the hydraulic control reversing valve is prolonged, and the working stability and the safety of the hydraulic control reversing valve are ensured.
The embodiment of the utility model provides an electro-hydraulic valve switching-over protecting against shock structure's advantage lies in:
1. when the electro-hydraulic valve reversing impact-resistant structure is used, a pilot electromagnetic valve and a hydraulic valve are combined, the electro-hydraulic valve reversing impact-resistant structure is optimized mainly on the basis of the original structure of the hydraulic valve body, and parts of a constant-pressure mechanism are additionally arranged;
2. the electro-hydraulic valve reversing impact-proof structure of the utility model processes the pressure-reducing cavity hole at the lower position between the original hydraulic main valve pilot valve surface P and the T function port, the total height is unchanged, and the limit of the installation space of a client is not influenced;
3. the utility model discloses an electro-hydraulic valve switching-over protecting against shock structure will lead the passageway of oil pocket to change into the inclined hole passageway in the valve body, for the decompression accent provides sufficient processing wall thickness space, and straight hole changes the inclined hole and has shortened runner length, has reduced the pressure drop loss.
Additionally, the utility model discloses an electro-hydraulic valve switching-over protecting against shock structure cost of manufacture is not high, and structural design is compact, and the finished product quality is stable, and it is convenient to reform transform, and low in manufacturing cost is applicable to the major structure of various electro-hydraulic valves.
The above embodiment numbers of the present invention are only for description, and do not represent the advantages and disadvantages of the embodiments. Through the above description of the embodiments, those skilled in the art will clearly understand that the above embodiment method can be implemented by some modifications plus the necessary general technical overlap; of course, the method can also be realized by simplifying some important technical features in the upper level. Based on such understanding, the technical solution of the present invention essentially or the part contributing to the prior art is: the whole function and structure, and cooperate the utility model discloses each embodiment the structure.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (8)
1. An electro-hydraulic valve commutation protecting against shock structure for installing a pilot valve, the structure comprising: a valve body; the valve body is provided with a flow guide hole and an oil outlet butted with the pilot valve, and a pressure reduction cavity is arranged in the valve body;
a slidable valve core is arranged in the pressure reduction cavity, a pressure regulating screw rod is arranged at one end of the pressure reduction cavity, and a pre-tightened pressure spring is arranged between the pressure regulating screw rod and the valve core;
two ends of the valve core are respectively used for radially plugging the flow guide hole and the oil outlet; the valve core compresses the pressure spring to slide under the action of hydraulic oil, so that the flow guide hole is connected with the oil outlet.
2. The electro-hydraulic valve reversing impact-resistant structure according to claim 1, wherein a pressure regulating cavity is further arranged in the valve body, and the pressure regulating screw is arranged in the pressure regulating cavity;
the valve body is further provided with an oil return port and an oil return cavity, and the oil return port is connected with the oil return cavity through the pressure regulating cavity.
3. The electro-hydraulic valve reversing impact-resistant structure as claimed in claim 2, wherein a throttle hole is arranged on the valve core and used for communicating the diversion hole with the oil outlet.
4. The electro-hydraulic valve reversing impact-resistant structure according to claim 3, wherein both ends of the valve core are cylinders, and a connecting rod is arranged between the two cylinders;
the two cylinders are respectively positioned at two ends of the pressure reduction cavity and respectively correspond to the flow guide hole and the oil outlet so as to seal the flow guide hole and the oil outlet.
5. The electro-hydraulic valve reversing impact-resistant structure according to any one of claims 1 to 3, wherein a tightening screw is arranged at the end of the pressure regulating screw; a nut is further installed on the outer side of the valve body; the screwing screw is arranged in the nut.
6. The electro-hydraulic valve reversing impact-resistant structure according to any one of claims 1 to 3, wherein the front end of the flow guide hole is an inclined oil guide channel, and the cross section of the flow guide channel is gradually reduced along the oil guide direction.
7. The electro-hydraulic valve reversing impact-resistant structure according to claim 4, wherein the pressure regulating cavity is connected with the pressure reducing cavity, and a communication hole is formed between the pressure regulating cavity and the pressure reducing cavity; the cylinder at one end of the valve core is positioned in the communicating hole; the valve body slides to open the communication hole.
8. The electro-hydraulic valve reversing impact-resistant structure according to claim 2, wherein the oil return port and the oil outlet are both located at the top of the valve body;
the top of the valve body is also provided with two guide holes; the upper part of the valve body is provided with a pilot electromagnetic valve; the pilot electromagnetic valve is connected with the valve body through the oil outlet, the oil return port and the guide hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021585840.6U CN212272696U (en) | 2020-08-04 | 2020-08-04 | Electro-hydraulic valve reversing anti-impact structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021585840.6U CN212272696U (en) | 2020-08-04 | 2020-08-04 | Electro-hydraulic valve reversing anti-impact structure |
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| CN212272696U true CN212272696U (en) | 2021-01-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021585840.6U Active CN212272696U (en) | 2020-08-04 | 2020-08-04 | Electro-hydraulic valve reversing anti-impact structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111810483A (en) * | 2020-08-04 | 2020-10-23 | 涌镇液压机械（上海）有限公司 | Electro-hydraulic valve reversing anti-impact structure |
| CN113775590A (en) * | 2021-10-18 | 2021-12-10 | 山东泰丰智能控制股份有限公司 | Constant pressure differential valve with buffering function |
-
2020
- 2020-08-04 CN CN202021585840.6U patent/CN212272696U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111810483A (en) * | 2020-08-04 | 2020-10-23 | 涌镇液压机械（上海）有限公司 | Electro-hydraulic valve reversing anti-impact structure |
| CN113775590A (en) * | 2021-10-18 | 2021-12-10 | 山东泰丰智能控制股份有限公司 | Constant pressure differential valve with buffering function |
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