CN220687708U - Automatic high-low speed hydraulic means of switching - Google Patents
Automatic high-low speed hydraulic means of switching Download PDFInfo
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- CN220687708U CN220687708U CN202322188206.9U CN202322188206U CN220687708U CN 220687708 U CN220687708 U CN 220687708U CN 202322188206 U CN202322188206 U CN 202322188206U CN 220687708 U CN220687708 U CN 220687708U
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- 239000012530 fluid Substances 0.000 claims description 5
- 239000010720 hydraulic oil Substances 0.000 abstract description 21
- 239000003921 oil Substances 0.000 description 18
- 230000009471 action Effects 0.000 description 6
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- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
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Abstract
The utility model belongs to the technical field of hydraulic systems, and particularly discloses an automatic switching high-low speed hydraulic device which comprises an electromagnetic reversing valve, a first one-way throttle valve, a second one-way throttle valve, a hydraulic cylinder and a high-low speed switching loop valve group, wherein the high-low speed switching loop valve group comprises a balance valve and a first one-way valve, a first one-way valve is communicated between a cylinder inlet and a cylinder outlet of the hydraulic cylinder, the cylinder outlet of the hydraulic cylinder is communicated with the balance valve, and the balance valve is communicated with the second one-way throttle valve. Through having set up high low speed switching circuit valves, utilize first check valve to carry out hydraulic oil confluence and handle to reach the purpose that high-speed stretches out, rethread balanced valve's setting sets for first check valve and carries out the threshold pressure that unidirectional connection was worked, when pressure reached the setting, automatic switch over to the low-speed return circuit from the high-speed return circuit, thereby realize the purpose of high low-speed automatic switch over.
Description
Technical Field
The utility model relates to the technical field of hydraulic systems, in particular to an automatic switching high-low speed hydraulic device.
Background
The hydraulic cylinder is a hydraulic actuator which converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swinging motion). When hydraulic oil is introduced into a cylinder inlet of the hydraulic cylinder, the hydraulic oil comes out from a cylinder withdrawal oil outlet of the hydraulic cylinder, so that the extending action of the hydraulic cylinder is completed; when hydraulic oil is introduced into the cylinder withdrawing oil port of the hydraulic oil cylinder, the hydraulic oil comes out of the cylinder inlet port of the hydraulic oil cylinder, so that the retraction action of the hydraulic oil cylinder is completed.
At present, the hydraulic cylinder is operated by a hydraulic valve group, when the hydraulic cylinder stretches out at a high speed and reaches a certain speed, the hydraulic cylinder cannot be automatically switched from a high speed to a low speed, and the oil inlet pressure is required to be manually interfered, so that the speed of the stretching out is adjusted.
It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the utility model and thus may include information that does not form the prior art that is already known to those of ordinary skill in the art.
Disclosure of Invention
The technical problem to be solved by the utility model is that the hydraulic cylinder in the background technology cannot automatically switch high and low speeds and needs manual intervention for switching, so that the automatic switching high and low speed hydraulic device is provided.
The technical scheme adopted by the utility model for solving the technical problems is as follows:
the utility model provides an automatic switch-over high low speed hydraulic means, includes electromagnetic directional valve, first one-way choke valve, second one-way choke valve and hydraulic cylinder, still includes high low speed switching circuit valves, high low speed switching circuit valves includes balanced valve and first one-way valve, electromagnetic directional valve with first one-way choke valve is linked together, first one-way choke valve with hydraulic cylinder's jar inlet is linked together, the hydraulic cylinder advances jar hydraulic fluid port and moves back and communicate there is first one-way valve between the jar hydraulic fluid port, hydraulic cylinder move back jar hydraulic fluid port with the balanced valve is linked together, the balanced valve with second one-way choke valve is linked together, the second one-way choke valve with electromagnetic directional valve is linked together.
The technical scheme for further limiting the first one-way valve and the connection relation thereof is as follows, wherein a cylinder withdrawal oil port of the hydraulic cylinder is communicated with an inlet of the first one-way valve, and an outlet of the first one-way valve is communicated with a cylinder inlet of the hydraulic cylinder.
The technical scheme for further limiting the balance valve and the connection relation thereof is that a cylinder withdrawal oil port of the hydraulic cylinder is communicated with an inlet of the balance valve, and an outlet of the balance valve is communicated with a one-way valve inlet of the second one-way throttle valve.
The following is the technical scheme that carries out further restriction to high low speed switching circuit valves and relation of connection thereof, high low speed switching circuit valves still includes the second check valve, the export of second check valve with the import of balanced valve is linked together, the import of second check valve with the export of balanced valve is linked together.
The technical scheme that the electromagnetic directional valve and the connection relation thereof are further limited is that the electromagnetic directional valve is a two-position four-way electromagnetic directional valve, the electromagnetic directional valve comprises a medium inlet, a medium first outlet, a medium second outlet and a medium discharge outlet, the medium inlet of the electromagnetic directional valve is communicated with an oil inlet passage, and the medium discharge outlet of the electromagnetic directional valve is communicated with an oil outlet passage.
The technical scheme that the first one-way throttle valve, the second one-way throttle valve and the connection relation thereof are further limited is that the first one-way throttle valve and the second one-way throttle valve both comprise a throttle valve and a one-way valve, a throttle valve inlet and a throttle valve outlet of the first one-way throttle valve are communicated, a throttle valve outlet and a throttle valve inlet of the first one-way throttle valve are communicated, a throttle valve inlet and a throttle valve outlet of the second one-way throttle valve are communicated, and a throttle valve outlet and a throttle valve inlet of the second one-way throttle valve are communicated.
The technical scheme is characterized in that the electromagnetic directional valve, the first one-way throttle valve, the second one-way throttle valve and the connection relation of the electromagnetic directional valve are further limited, a medium first outlet of the electromagnetic directional valve is communicated with a throttle inlet of the first one-way throttle valve, a throttle outlet of the first one-way throttle valve is communicated with a cylinder inlet of the hydraulic cylinder, a medium second outlet of the electromagnetic directional valve is communicated with a throttle inlet of the second one-way throttle valve, and a throttle outlet of the second one-way throttle valve is communicated with an inlet of the second one-way throttle valve.
Compared with the prior art, the utility model has the following technical effects:
according to the utility model, the high-speed and low-speed switching loop valve group is arranged, the hydraulic oil is converged by the first one-way valve, so that the purpose of high-speed extension is achieved, the threshold pressure of the first one-way valve for one-way conduction is set by the arrangement of the balance valve, and when the pressure reaches a set value, the high-speed loop is automatically switched to the low-speed loop, so that the purpose of high-speed and low-speed automatic switching is achieved.
The utility model will be further described with reference to the drawings and examples.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following description will briefly explain the embodiments or the drawings needed in the prior art, and it is obvious that the drawings in the following description are only some embodiments of the present utility model and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a simplified connection diagram of the present utility model.
Reference numerals: 1. an electromagnetic reversing valve; 2. a first one-way throttle valve; 3. a second one-way throttle valve; 4. a hydraulic cylinder; 5. a balancing valve; 6. a first one-way valve; 7. and a second one-way valve.
Detailed Description
In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.
In the description of the present utility model, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the embodiments of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like are to be construed broadly and include, for example, either permanently connected, removably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present utility model will be understood by those of ordinary skill in the art according to specific circumstances.
As shown in fig. 1, an automatic switching high-low speed hydraulic device is provided, which comprises an electromagnetic directional valve 1, a first one-way throttle valve 2, a second one-way throttle valve 3, a hydraulic cylinder 4 and a high-low speed switching loop valve group. The electromagnetic directional valve 1 is used for switching the extension or retraction of the hydraulic cylinder 4; the first one-way throttle valve 2 and the second one-way throttle valve 3 are used for adjusting the extending speed or the retracting speed of the hydraulic cylinder 4; the high-low speed switching loop valve group is used for automatically switching to the low speed loop when the pressure of the high speed loop reaches the set pressure.
The specific structures of the electromagnetic directional valve 1, the first unidirectional throttle valve 2, the second unidirectional throttle valve 3 and the high-low speed switching loop valve group are sequentially described in detail as follows:
for the electromagnetic directional valve 1: the electromagnetic directional valve 1 is a two-position four-way electromagnetic directional valve 1, the electromagnetic directional valve 1 comprises a medium inlet, a medium first outlet, a medium second outlet and a medium discharge outlet, the medium inlet of the electromagnetic directional valve 1 is communicated with an oil inlet passage, and the medium discharge outlet of the electromagnetic directional valve 1 is communicated with an oil outlet passage.
For the first one-way throttle valve 2 and the second one-way throttle valve 3: the first one-way throttle valve 2 and the second one-way throttle valve 3 comprise throttle valves and one-way valves, the throttle valve inlet and the one-way valve outlet of the first one-way throttle valve 2 are communicated, the throttle valve outlet and the one-way valve inlet of the first one-way throttle valve 2 are communicated, the throttle valve inlet and the one-way valve outlet of the second one-way throttle valve 3 are communicated, and the throttle valve outlet and the one-way valve inlet of the second one-way throttle valve 3 are communicated.
For a high-low speed switching loop valve set: the high-low speed switching loop valve group comprises a balance valve 5, a first one-way valve 6 and a second one-way valve 7, wherein the inlet of the balance valve 5 is communicated with the inlet of the first one-way valve 6, the inlet of the balance valve 5 is communicated with the outlet of the second one-way valve 7, and the outlet of the balance valve 5 is communicated with the inlet of the second one-way valve 7.
The following describes in detail the connection relationship among the electromagnetic directional valve 1, the first one-way throttle valve 2, the second one-way throttle valve 3, the hydraulic cylinder 4, and the high-low speed switching circuit valve group:
the first medium outlet of the electromagnetic directional valve 1 is communicated with the throttle inlet of the first one-way throttle valve 2, the throttle outlet of the first one-way throttle valve 2 is communicated with the cylinder inlet of the hydraulic cylinder 4, the cylinder outlet of the hydraulic cylinder 4 is communicated with the inlet of the first one-way valve 6, the outlet of the first one-way valve 6 is communicated with the cylinder inlet of the hydraulic cylinder 4, the cylinder outlet of the hydraulic cylinder 4 is communicated with the inlet of the balance valve 5, the outlet of the balance valve 5 is communicated with the one-way valve inlet of the second one-way throttle valve 3, the medium second outlet of the electromagnetic directional valve 1 is communicated with the throttle inlet of the second one-way throttle valve 3, and the throttle outlet of the second one-way throttle valve 3 is communicated with the inlet of the second one-way valve 7.
The operation of this embodiment will be further described below:
in a high-speed extension loop, the left side of the electromagnetic directional valve 1 is electrified, hydraulic oil enters from an oil inlet passage, and enters into the hydraulic oil cylinder 4 through a medium inlet of the electromagnetic directional valve 1, a medium first outlet of the electromagnetic directional valve 1, a throttle inlet of the first one-way throttle valve 2, a throttle outlet of the first one-way throttle valve 2 and an oil inlet of the hydraulic oil cylinder 4;
subsequently, the hydraulic oil cylinder 4 performs high-speed extension action, hydraulic oil of the hydraulic oil cylinder 4 comes out from a cylinder withdrawal oil port of the hydraulic oil cylinder 4 and is converged through an inlet of the first one-way valve 6, an outlet of the first one-way valve 6 and a cylinder inlet port of the hydraulic oil cylinder 4, so that high-speed extension action is realized;
when the pressure of the high-speed extension loop reaches the set pressure (the set value can be 80 bar), the low-speed extension loop is automatically switched, so that in the low-speed extension loop, hydraulic oil enters from an oil inlet passage and enters into the hydraulic cylinder 4 through a medium inlet of the electromagnetic directional valve 1, a medium first outlet of the electromagnetic directional valve 1, a throttle inlet of the first one-way throttle valve 2, a throttle outlet of the first one-way throttle valve 2 and a cylinder inlet of the hydraulic cylinder 4;
subsequently, the hydraulic cylinder 4 performs high-speed extension action, hydraulic oil of the hydraulic cylinder 4 comes out from a cylinder withdrawal oil port of the hydraulic cylinder 4, passes through an inlet of the balance valve 5, an outlet of the balance valve 5, a one-way valve inlet of the second one-way throttle valve 3, a one-way valve outlet of the second one-way throttle valve 3, a medium second outlet of the electromagnetic directional valve 1 and a medium discharge port of the electromagnetic directional valve 1, and finally flows back to an oil outlet passage.
In the retraction loop, the right side of the electromagnetic directional valve 1 is electrified, hydraulic oil enters from an oil inlet passage, and enters into the hydraulic cylinder 4 through a medium inlet of the electromagnetic directional valve 1, a medium second outlet of the electromagnetic directional valve 1, a throttle inlet of the second one-way throttle valve 3, a throttle outlet of the second one-way throttle valve 3 and a cylinder withdrawal oil port of the hydraulic cylinder 4;
subsequently, the hydraulic cylinder 4 performs a retracting action, hydraulic oil of the hydraulic cylinder 4 comes out from a cylinder inlet of the hydraulic cylinder 4, passes through a one-way valve inlet of the first one-way throttle valve 2, a one-way valve outlet of the first one-way throttle valve 2, a medium first outlet of the electromagnetic directional valve 1, and a medium discharge outlet of the electromagnetic directional valve 1, and finally flows back to an oil outlet passage.
The above description is only of the preferred embodiment of the present utility model, and is not intended to limit the present utility model in any way. Any person skilled in the art can make many possible variations and modifications to the technical solution of the present utility model or modifications to equivalent embodiments using the methods and technical contents disclosed above, without departing from the scope of the technical solution of the present utility model. Therefore, all equivalent changes according to the shape, structure and principle of the present utility model are covered in the protection scope of the present utility model.
Claims (7)
1. The utility model provides an automatic switch-over high low speed hydraulic means, includes electromagnetic directional valve, first one-way choke valve, second one-way choke valve and hydraulic cylinder, its characterized in that still includes high low speed switching circuit valves, high low speed switching circuit valves includes balanced valve and first one-way valve, electromagnetic directional valve with first one-way choke valve is linked together, first one-way choke valve with hydraulic cylinder's jar inlet is linked together, the intercommunication has first one-way valve between hydraulic cylinder's jar inlet and the jar return hydraulic fluid port, hydraulic cylinder's jar return hydraulic fluid port with the balanced valve is linked together, balanced valve with second one-way choke valve is linked together, second one-way choke valve with electromagnetic directional valve is linked together.
2. The automatic switching high-low speed hydraulic device according to claim 1, wherein a cylinder withdrawal port of the hydraulic cylinder is communicated with an inlet of the first check valve, and an outlet of the first check valve is communicated with a cylinder inlet port of the hydraulic cylinder.
3. The automatic switching high-low speed hydraulic device according to claim 1, wherein a cylinder withdrawal port of the hydraulic cylinder is communicated with an inlet of the balance valve, and an outlet of the balance valve is communicated with a check valve inlet of the second check throttle valve.
4. A self-switching high and low speed hydraulic device according to any one of claims 1-3, wherein said high and low speed switching circuit valve block further comprises a second one-way valve, an outlet of said second one-way valve being in communication with an inlet of said balancing valve, an inlet of said second one-way valve being in communication with an outlet of said balancing valve.
5. The automatic switching high-low speed hydraulic device according to claim 4, wherein the electromagnetic directional valve is a two-position four-way electromagnetic directional valve, the electromagnetic directional valve comprises a medium inlet, a medium first outlet, a medium second outlet and a medium discharge port, the medium inlet of the electromagnetic directional valve is communicated with an oil inlet passage, and the medium discharge port of the electromagnetic directional valve is communicated with an oil outlet passage.
6. The automatic switching high-low speed hydraulic device according to claim 5, wherein the first unidirectional throttle valve and the second unidirectional throttle valve each comprise a throttle valve and a unidirectional valve, wherein the throttle valve inlet and the unidirectional valve outlet of the first unidirectional throttle valve are communicated, the throttle valve outlet and the unidirectional valve inlet of the first unidirectional throttle valve are communicated, the throttle valve inlet and the unidirectional valve outlet of the second unidirectional throttle valve are communicated, and the throttle valve outlet and the unidirectional valve inlet of the second unidirectional throttle valve are communicated.
7. The automatic switching high-low speed hydraulic device according to claim 6, wherein a medium first outlet of the electromagnetic directional valve is communicated with a throttle inlet of the first one-way throttle valve, a throttle outlet of the first one-way throttle valve is communicated with a cylinder inlet of the hydraulic cylinder, a medium second outlet of the electromagnetic directional valve is communicated with a throttle inlet of the second one-way throttle valve, and a throttle outlet of the second one-way throttle valve is communicated with an inlet of the second one-way throttle valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322188206.9U CN220687708U (en) | 2023-08-15 | 2023-08-15 | Automatic high-low speed hydraulic means of switching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322188206.9U CN220687708U (en) | 2023-08-15 | 2023-08-15 | Automatic high-low speed hydraulic means of switching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220687708U true CN220687708U (en) | 2024-03-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322188206.9U Active CN220687708U (en) | 2023-08-15 | 2023-08-15 | Automatic high-low speed hydraulic means of switching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220687708U (en) |
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2023
- 2023-08-15 CN CN202322188206.9U patent/CN220687708U/en active Active
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