CN209761886U - Automatic pressurizing loop of hydraulic support upright post - Google Patents
Automatic pressurizing loop of hydraulic support upright post Download PDFInfo
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- CN209761886U CN209761886U CN201920666181.XU CN201920666181U CN209761886U CN 209761886 U CN209761886 U CN 209761886U CN 201920666181 U CN201920666181 U CN 201920666181U CN 209761886 U CN209761886 U CN 209761886U
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Abstract
The utility model relates to an automatic pressure boost return circuit of hydraulic support stand, including first pneumatic cylinder and second pneumatic cylinder to and the pressure boost pipeline of first pneumatic cylinder and second pneumatic cylinder, the pressure boost pipeline includes booster, first check valve, second check valve, third check valve, first liquid accuse switching-over valve and second liquid accuse switching-over valve, the rodless chamber of booster little piston chamber through second check valve and third check valve intercommunication first pneumatic cylinder and second pneumatic cylinder respectively, and the big piston chamber of booster is through second liquid accuse switching-over valve connection first liquid accuse switching-over valve, first liquid accuse switching-over valve passes through first check valve and second check valve and third check valve intercommunication. The utility model discloses can carry out automatic pressure boost to hydraulic support through the booster when hydraulic support's pressure is not enough.
Description
Technical Field
The utility model relates to a hydraulic support technical field, concretely relates to automatic pressure boost return circuit of hydraulic support stand.
Background
With the development of the field of comprehensive mechanized coal mining, the hydraulic support becomes an important supporting apparatus in fully mechanized coal mining equipment. When the fully mechanized mining operation is carried out, the key factor for ensuring the safe operation of the fully mechanized mining operation is that the actual supporting force of the hydraulic support reaches the engineering requirement.
The existing hydraulic support has the problems that oil leakage and the like can occur in an upright hydraulic cylinder in the supporting process, so that the pressure of an upright lower cavity is gradually reduced, a top plate supported by the upper part of the hydraulic support can be reduced when the supporting force of the upright is insufficient, and finally accidents such as waste rock leakage, roof collapse and the like can be caused due to the reduction of the top plate.
Aiming at the problems, when the hydraulic support is put into operation, the hydraulic support needs to be pressurized in order to ensure that the supporting force of the hydraulic support meets the engineering requirements, so that the supporting initiative of the stand column is improved, and the safety of fully mechanized mining operation is ensured.
Disclosure of Invention
The utility model discloses a solve the problem that current hydraulic support's holding power can not reach the engineering requirement, provide an automatic pressure boost return circuit of hydraulic support stand, can carry out the pressure boost to hydraulic support automatically when hydraulic support's pressure is not enough.
In order to realize the purpose, the technical scheme of the utility model is that:
The utility model provides an automatic pressure boost return circuit of hydraulic support stand, includes first pneumatic cylinder and second pneumatic cylinder to and the pressure boost pipeline of first pneumatic cylinder and second pneumatic cylinder, the pressure boost pipeline includes booster, first check valve, second check valve, third check valve, first liquid accuse switching-over valve and second liquid accuse switching-over valve, the rodless chamber of first pneumatic cylinder of booster little piston chamber intercommunication respectively and second pneumatic cylinder through second check valve and third check valve, and the first liquid accuse switching-over valve is connected through second liquid accuse switching-over valve in the big piston chamber of booster, first liquid accuse switching-over valve passes through first check valve and second check valve and third check valve intercommunication.
Furthermore, oil inlets of the second one-way valve and the third one-way valve are connected with a small piston cavity and a first one-way valve of the supercharger, oil outlets of the second one-way valve and the third one-way valve are connected with rodless cavities of the first hydraulic cylinder and the second hydraulic cylinder, and an oil outlet of the first one-way valve is connected with a small piston cavity of the supercharger.
furthermore, the first hydraulic control reversing valve is a two-position two-way hydraulic control reversing valve, the port P of the first hydraulic control reversing valve is an oil inlet, the port A is an oil outlet, the port A is respectively connected with an oil inlet of the second hydraulic control reversing valve and an oil inlet of the first one-way valve, and a control oil path of the first hydraulic control reversing valve is connected with a rodless cavity of the first hydraulic cylinder.
Furthermore, the second hydraulic control reversing valve is a two-position three-way hydraulic control reversing valve, the port A is an oil outlet, the port P is an oil inlet, the port T is an oil return port, the port A of the second hydraulic control reversing valve is connected with a large piston cavity of the supercharger 13, and a control oil path of the second hydraulic control reversing valve is connected with a small piston cavity of the supercharger 13.
Furthermore, rod cavities of the first hydraulic cylinder and the second hydraulic cylinder are communicated with a manual reversing valve, and rodless cavities of the first hydraulic cylinder and the second hydraulic cylinder are respectively communicated with a first safety valve and a second safety valve.
Furthermore, the manual reversing valve is a three-position four-way reversing valve, a P port of the manual reversing valve is an oil inlet, a T port is an oil return port, an A port and a B port are control oil ports, the B port of the manual reversing valve is connected with rod cavities of the first hydraulic cylinder and the second hydraulic cylinder, the A port of the manual reversing valve is communicated with oil inlets of the first hydraulic control one-way valve and the second hydraulic control one-way valve,
Furthermore, oil outlets of the first hydraulic control one-way valve and the second hydraulic control one-way valve are communicated with the rodless cavity, and control oil ways of the first hydraulic control one-way valve and the second hydraulic control one-way valve are connected with the rod cavity of the first hydraulic cylinder and the rod cavity of the second hydraulic cylinder.
Through the technical scheme, the beneficial effects of the utility model are that:
The utility model is provided with a supercharger, when the hydraulic cylinder needs supercharging, the hydraulic oil in the hydraulic cylinder makes the first hydraulic control reversing valve left-position switch-on through the control oil circuit of the first hydraulic control reversing valve, at this moment, the hydraulic oil enters the small piston cavity of the supercharger, the oil pressure of the hydraulic oil pushes the valve plug of the supercharger to move rightwards, at this moment, the supercharger makes the second hydraulic control reversing valve left-position work, the first hydraulic control reversing valve and the second hydraulic control reversing valve are in left-position work simultaneously, at this moment, the hydraulic oil of a pump station enters the large piston cavity of the supercharger from the left-position of the first hydraulic control reversing valve and the second hydraulic control reversing valve, the action area of the large piston cavity of the supercharger is larger than that of the small piston cavity, when the supercharger piston moves steadily, the hydraulic pressure of the small piston cavity is stronger than that of the large piston cavity, at this moment, the valve, the high-pressure oil liquid is used for pressurizing a rodless cavity of the hydraulic cylinder through the second one-way valve, so that the supporting force of the hydraulic support is further improved.
Drawings
Fig. 1 is a schematic view of the pressurization principle of an automatic pressurization circuit for a hydraulic support column of the present invention.
The reference numbers in the drawings are as follows: 1 is first pneumatic cylinder, 2 is the second pneumatic cylinder, 3 is first relief valve, 4 is the second relief valve, 5 is first pilot operated check valve, 6 is the second pilot operated check valve, 7 is manual switching-over valve, 8 is first pilot operated switching-over valve, 9 is first check valve, 10 is the second check valve, 11 is the third check valve, 12 is the second pilot operated switching-over valve, 13 is the booster.
Detailed Description
The invention will be further explained with reference to the drawings and the detailed description below:
As shown in fig. 1, an automatic pressurization loop for a hydraulic support column comprises a first hydraulic cylinder 1, a second hydraulic cylinder 2 and pressurization pipelines of the first hydraulic cylinder 1 and the second hydraulic cylinder 2, wherein the pressurization pipelines comprise a supercharger 13, a first check valve 9, a second check valve 10, a third check valve 11, a first hydraulic control directional valve 8 and a second hydraulic control directional valve 12, a small piston cavity of the supercharger 13 is respectively communicated with rodless cavities of the first hydraulic cylinder 1 and the second hydraulic cylinder 2 through the second check valve 10 and the third check valve 11, a large piston cavity of the supercharger 13 is connected with the first hydraulic control directional valve 8 through the second hydraulic control directional valve 12, and the first hydraulic control directional valve 8 is communicated with the second check valve 10 and the third check valve 11 through the first check valve 9.
In order to optimize the product structure, oil inlets of the second check valve 10 and the third check valve 11 are connected with a small piston cavity of the supercharger 13 and the first check valve 9, oil outlets of the second check valve 10 and the third check valve 11 are connected with rodless cavities of the first hydraulic cylinder 1 and the second hydraulic cylinder 2, and an oil outlet of the first check valve 9 is connected with the small piston cavity of the supercharger 13. The first hydraulic control reversing valve 8 is a two-position two-way hydraulic control reversing valve, a port P of the first hydraulic control reversing valve 8 is an oil inlet, a port A is an oil outlet, the port A is respectively connected with an oil inlet of the second hydraulic control reversing valve 12 and an oil inlet of the first one-way valve 9, and a control oil path of the first hydraulic control reversing valve 8 is connected with a rodless cavity of the first hydraulic cylinder 1.
The second hydraulic control reversing valve 12 is a two-position three-way hydraulic control reversing valve, an A port is an oil outlet, a P port is an oil inlet, a T port is an oil return port, the A port of the second hydraulic control reversing valve 12 is connected with a large piston cavity of the supercharger 13, and a control oil way of the second hydraulic control reversing valve 12 is connected with a small piston cavity of the supercharger 13.
In order to ensure the system safety, when the pressure of a rodless cavity of the hydraulic cylinder is too high, the pressure of the rodless cavity of the hydraulic cylinder needs to be relieved, the rod cavities of the first hydraulic cylinder 1 and the second hydraulic cylinder 2 are communicated with a manual reversing valve 7, the rodless cavities of the first hydraulic cylinder 1 and the second hydraulic cylinder 2 are respectively communicated with a first safety valve 3 and a second safety valve 4, and oil outlets of the first safety valve 3 and the second safety valve 4 are communicated with an oil tank.
In order to continuously provide normal-pressure hydraulic oil for the hydraulic cylinders and optimize the product structure, the manual reversing valve 7 is a three-position four-way reversing valve, a P port of the manual reversing valve 7 is an oil inlet, a T port of the manual reversing valve 7 is an oil return port, an A port and a B port are control oil ports, the B port of the manual reversing valve 7 is connected with rod cavities of the first hydraulic cylinder 1 and the second hydraulic cylinder 2, the A port of the manual reversing valve 7 is communicated with oil inlets of the first hydraulic control one-way valve 5 and the second hydraulic control one-way valve 6, and the T port of the manual reversing valve 7 is connected with an oil tank.
Further optimize product structure, prevent the hydraulic oil refluence in the no pole chamber of pneumatic cylinder, the oil-out switch-on no pole chamber of first hydraulically controlled check valve 5 and second hydraulically controlled check valve 6, the control oil circuit of first hydraulically controlled check valve 5 and second hydraulically controlled check valve 6 connects the pole chamber that has of first pneumatic cylinder 1 and second pneumatic cylinder 2.
When the hydraulic support works, firstly, the manual reversing valve 7 is opened, the manual reversing valve 7 works at the left position, a port P of the manual reversing valve 7 is connected with a pump station, at the moment, normal-pressure hydraulic oil enters the rodless cavity support of the first hydraulic cylinder 1 and the second hydraulic cylinder 2 through a port A of the manual reversing valve 7 and the first hydraulic check valve 5 and the second hydraulic check valve 6 respectively to ascend, when a top beam of the support is contacted with a supported object, the first hydraulic cylinder 1 and the second hydraulic cylinder 2 cannot ascend continuously, at the moment, the pressure of the hydraulic oil in the rodless cavity rises, when the pressure rises to the set pressure of the first hydraulic control reversing valve 8, the hydraulic oil in the rodless cavity enters the first hydraulic control reversing valve 8 through a control oil path and enables the left position of the first hydraulic control reversing valve 8 to be communicated, as shown in fig. 1, the supercharger 13 has A, B, C three paths, at the moment, the hydraulic oil enters a small piston cavity of the supercharger 13 from the port A of the first hydraulic control valve 8 through the first, the valve core of the supercharger 13 moves from left to right to the rightmost end of the large piston cavity of the supercharger 13 under the pressure action of the hydraulic oil to complete the supercharging preparation work, because the valve core moves, the channel B originally closed by the valve core is opened, at the moment, the hydraulic oil enters the second hydraulic control reversing valve 12 through the channel B and the control oil path of the second hydraulic control reversing valve 12, the second hydraulic control reversing valve 12 works at the left position, at the moment, the first hydraulic control reversing valve 8 and the second hydraulic control reversing valve 12 are both in the left position working state, the hydraulic oil of the pump station flows through the port A of the first hydraulic control reversing valve 8, flows through the port A of the second hydraulic control reversing valve 12 and then enters the large piston cavity of the supercharger 13 through the channel C of the supercharger 13, when the valve core of the supercharger 13 moves stably, the pressure of the hydraulic oil acting on the valve core in the large piston cavity and the small piston cavity is equal, but because the acting area of, therefore, the oil pressure in the small piston cavity is high, the hydraulic oil in the large piston cavity pushes the valve core to move leftwards, the high-pressure oil in the small piston cavity flows out from the channel A of the supercharger 13, the pressurized hydraulic oil enters the rodless cavities of the first hydraulic cylinder 1 and the second hydraulic cylinder 2 through the second check valve 10 and the third check valve 11 respectively to pressurize the rodless cavities of the first hydraulic cylinder 1 and the second hydraulic cylinder 2, and the pressurization loop of the hydraulic support is automatically pressurized at the moment.
The above-mentioned embodiments are merely preferred embodiments of the present invention, and not intended to limit the scope of the present invention, so that equivalent changes or modifications made by the structure, features and principles of the present invention should be included in the claims of the present invention.
Claims (7)
1. An automatic pressurization loop of a hydraulic support upright column comprises a first hydraulic cylinder (1), a second hydraulic cylinder (2) and pressurization pipelines of the first hydraulic cylinder (1) and the second hydraulic cylinder (2), it is characterized in that the supercharging pipeline comprises a supercharger (13), a first one-way valve (9), a second one-way valve (10), a third one-way valve (11), a first hydraulic control reversing valve (8) and a second hydraulic control reversing valve (12), the small piston cavity of the supercharger (13) is respectively communicated with the rodless cavities of the first hydraulic cylinder (1) and the second hydraulic cylinder (2) through a second one-way valve (10) and a third one-way valve (11), the large piston cavity of the supercharger (13) is connected with the first hydraulic control reversing valve (8) through a second hydraulic control reversing valve (12), the first hydraulic control reversing valve (8) is communicated with the second one-way valve (10) and the third one-way valve (11) through the first one-way valve (9).
2. The automatic hydraulic support column pressurization circuit according to claim 1, wherein oil inlets of the second check valve (10) and the third check valve (11) are connected with a small piston cavity of the pressurizer (13) and the first check valve (9), oil outlets of the second check valve (10) and the third check valve (11) are connected with rodless cavities of the first hydraulic cylinder (1) and the second hydraulic cylinder (2), and an oil outlet of the first check valve (9) is connected with a small piston cavity of the pressurizer (13).
3. The automatic hydraulic support column pressurization circuit according to claim 1, wherein the first hydraulic control directional control valve (8) is a two-position two-way hydraulic control directional control valve, the port P of the first hydraulic control directional control valve (8) is an oil inlet, the port A is an oil outlet, the port A is respectively connected with an oil inlet of the second hydraulic control directional control valve (12) and an oil inlet of the first check valve (9), and a control oil path of the first hydraulic control directional control valve (8) is connected with a rodless cavity of the first hydraulic cylinder (1).
4. The automatic hydraulic support column pressurization circuit according to claim 3, wherein the second hydraulic control reversing valve (12) is a two-position three-way hydraulic control reversing valve, the port A is an oil outlet, the port P is an oil inlet, the port T is an oil return port, the port A of the second hydraulic control reversing valve (12) is connected with a large piston cavity of the supercharger (13), and a control oil path of the second hydraulic control reversing valve (12) is connected with a small piston cavity of the supercharger (13).
5. The automatic hydraulic support column pressurization circuit according to claim 1, characterized in that the rod chambers of the first hydraulic cylinder (1) and the second hydraulic cylinder (2) are communicated with a manual directional valve (7), and the rodless chambers of the first hydraulic cylinder (1) and the second hydraulic cylinder (2) are respectively communicated with a first safety valve (3) and a second safety valve (4).
6. the automatic hydraulic support column pressurization circuit according to claim 5, wherein the manual directional control valve (7) is a three-position four-way directional control valve, the port P of the manual directional control valve (7) is an oil inlet, the port T is an oil return port, the ports A and B are control oil ports, the port B of the manual directional control valve (7) is connected with the rod cavities of the first hydraulic cylinder (1) and the second hydraulic cylinder (2), and the port A of the manual directional control valve (7) is communicated with the oil inlets of the first hydraulic control one-way valve (5) and the second hydraulic control one-way valve (6).
7. The automatic hydraulic support column pressurization circuit according to claim 6, wherein oil outlets of the first hydraulic control check valve (5) and the second hydraulic control check valve (6) are communicated with a rodless cavity, and control oil passages of the first hydraulic control check valve (5) and the second hydraulic control check valve (6) are connected with rod cavities of the first hydraulic cylinder (1) and the second hydraulic cylinder (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920666181.XU CN209761886U (en) | 2019-05-10 | 2019-05-10 | Automatic pressurizing loop of hydraulic support upright post |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920666181.XU CN209761886U (en) | 2019-05-10 | 2019-05-10 | Automatic pressurizing loop of hydraulic support upright post |
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| Publication Number | Publication Date |
|---|---|
| CN209761886U true CN209761886U (en) | 2019-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920666181.XU Expired - Fee Related CN209761886U (en) | 2019-05-10 | 2019-05-10 | Automatic pressurizing loop of hydraulic support upright post |
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| CN (1) | CN209761886U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112879379A (en) * | 2021-02-01 | 2021-06-01 | 中国航发沈阳发动机研究所 | Efficient three-cavity hydraulic cylinder and actuating method thereof |
| CN113339025A (en) * | 2021-06-04 | 2021-09-03 | 煤炭科学研究总院 | Hydraulic system and hydraulic support group |
-
2019
- 2019-05-10 CN CN201920666181.XU patent/CN209761886U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112879379A (en) * | 2021-02-01 | 2021-06-01 | 中国航发沈阳发动机研究所 | Efficient three-cavity hydraulic cylinder and actuating method thereof |
| CN113339025A (en) * | 2021-06-04 | 2021-09-03 | 煤炭科学研究总院 | Hydraulic system and hydraulic support group |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191210 Termination date: 20200510 |