CN213899440U - Hydraulic circuit protection type hydraulic system of roadblock machine - Google Patents
Hydraulic circuit protection type hydraulic system of roadblock machine Download PDFInfo
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- CN213899440U CN213899440U CN202023040560.XU CN202023040560U CN213899440U CN 213899440 U CN213899440 U CN 213899440U CN 202023040560 U CN202023040560 U CN 202023040560U CN 213899440 U CN213899440 U CN 213899440U
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Abstract
The utility model relates to a roadblock machine hydraulic circuit protection type hydraulic system belongs to the technical field of roadblock machine, and it includes main hydraulic circuit and a plurality of hydraulic unit that connect in parallel on main hydraulic circuit, and main hydraulic circuit includes oil tank, oil pump and switching-over valve, and every hydraulic unit all includes check valve and a pneumatic cylinder, and the pneumatic cylinder includes no pole chamber and has the pole chamber, hydraulic unit still includes hydraulic sensor and semi-automatic logical check valve, and hydraulic sensor is located between check valve and the no pole chamber, and semi-automatic logical check valve is located between switching-over valve and the check valve, and semi-automatic logical check valve is located the oil circuit that communicates with no pole chamber, and hydraulic sensor is connected with semi-automatic logical check valve electricity. The hydraulic unit can be disconnected from the main hydraulic circuit after the roadblock machine is impacted by a vehicle rushing card, so that the other parts of the hydraulic circuit are protected from being damaged in a normal working state.
Description
Technical Field
The application relates to the technical field of roadblock machines, in particular to a hydraulic circuit protection type hydraulic system of a roadblock machine.
Background
The roadblock is a device capable of effectively controlling the driving range of the vehicle, is widely applied to gates needing to limit the vehicle to enter and exit, such as government offices, banks, toll stations, communities, parking lots and the like, and effectively prevents the vehicle from forcibly rushing out of the card. The traffic order and the safety of main facilities and places are effectively guaranteed by limiting the passing vehicles. The current major forms of roadblocks include panel-turnover roadblocks and lift roadblocks.
The whole structure of the lifting type roadblock machine consists of a stand column, a hydraulic system and an electrical control system. As shown in fig. 1, the hydraulic system is a hydraulic circuit mainly composed of an oil tank 2, an oil pump 1, a reversing valve 3, a check valve, a hydraulic cylinder 5, and the like, wherein the oil tank 2, the oil pump 1, the reversing valve 3, and an oil path communicating the three are main hydraulic circuits, a single check valve, a single hydraulic cylinder 5, and an oil path communicating the two are a hydraulic unit, the single main hydraulic circuit can be connected with a plurality of hydraulic units in parallel, and each hydraulic unit is used for controlling the lifting of a single column.
The upright post of the lifting type roadblock machine in the related technology has two response modes when encountering forced collision of a vehicle during the rising process: firstly, the upright post is continuously lifted to a final travel position regardless of the collision, and the method aims to strengthen the interception of the car rushing out of the car; second, the column is lowered by actuating the reversing valve to reverse immediately through a negative feedback mechanism, which is intended to reduce damage to the roadblock column itself and to the vehicle.
With respect to the related art among the above, the inventors consider that the following drawbacks exist: in the process that the stand rises, it is very fast to dash the truck speed, it is great to the impact force of stand when taking place the striking, very easily cause the damage of stand and scrap, and because the lift of stand directly receives hydraulic system's pneumatic cylinder control, no matter so this moment control stand continues to rise or stops the decline of rising process turn around, all probably can make the pneumatic cylinder receive the effect of impact force indirectly and take place failures such as vibration, pressure unstability to transmit the pressure fluctuation that the oil pressure jar received to whole hydraulic system through main hydraulic circuit, in order to cause the damage to hydraulic system.
SUMMERY OF THE UTILITY MODEL
In order to improve the problem that the stand rises the in-process and receives the impact and easily cause the damage to hydraulic system, this application provides a roadblock machine hydraulic circuit protection type hydraulic system.
The application provides a roadblock machine hydraulic circuit protection type hydraulic system adopts following technical scheme:
the utility model provides a roadblock machine hydraulic circuit protection type hydraulic system, includes main hydraulic circuit and a plurality of hydraulic unit that connect in parallel on main hydraulic circuit, main hydraulic circuit includes oil tank, oil pump and switching-over valve, every hydraulic unit all includes check valve and a pneumatic cylinder, every a stand of pneumatic cylinder control goes up and down, the pneumatic cylinder includes no pole chamber and has the pole chamber, hydraulic unit still includes hydraulic sensor and semi-automatic logical stop valve, hydraulic sensor is located between check valve and the no pole chamber, semi-automatic logical stop valve is located between switching-over valve and the check valve, just semi-automatic logical stop valve is located the oil circuit with no pole chamber intercommunication, hydraulic sensor is connected with semi-automatic logical stop valve electricity.
By adopting the technical scheme, when the hydraulic sensor detects the sudden change of the oil pressure in the rodless cavity, the semi-automatic stop valve is controlled to be closed, so that the connection between the hydraulic cylinder with an accident and the main hydraulic circuit is blocked, and other parts of the hydraulic system are protected from being damaged in a normal working state.
Optionally, a manual stop valve is arranged between the check valve and the rodless cavity.
Through adopting above-mentioned technical scheme, after the striking accident is relieved, can get rid of the fluid of no pole intracavity through opening manual stop valve and make the piston rod of pneumatic cylinder reset.
Optionally, a first overflow valve is arranged between the check valve and the rodless cavity.
By adopting the technical scheme, after the semi-automatic open-close valve is closed, the first overflow valve can automatically remove the excessive oil pressure in the hydraulic unit, so that the damage of the oil circuit and elements between the hydraulic cylinder and the semi-automatic open-close valve by strong hydraulic pressure is reduced.
Optionally, the check valve is a double hydraulic control check valve.
By adopting the technical scheme, the bidirectional self-locking of the upright column of the hydraulic system in a static state is realized.
Optionally, the hydraulic pressure sensor further comprises a warning lamp, and the warning lamp is electrically connected with the hydraulic pressure sensor.
By adopting the technical scheme, visual safety reminding can be performed on field personnel when an accident occurs.
Optionally, the hydraulic pressure sensor further comprises a buzzer, and the buzzer is electrically connected with the hydraulic pressure sensor.
By adopting the technical scheme, the auditory safety reminding device can carry out auditory safety reminding on field personnel when an accident occurs.
Optionally, a second overflow valve is arranged between the oil pump and the reversing valve.
By adopting the technical scheme, the second overflow valve can automatically unload the excessive oil pressure in the main hydraulic circuit, so that the pressure relief protection effect is realized on the main hydraulic circuit.
Optionally, an oil filter is arranged between the oil tank and the oil pump.
By adopting the technical scheme, the impurities entering the main hydraulic circuit are reduced, and further the damage of the oil impurities to system elements is reduced.
In summary, the present application includes at least one of the following beneficial technical effects:
1. through the arrangement of the hydraulic sensor and the semi-automatic through-stop valve, when the hydraulic sensor detects that the oil pressure of the rodless cavity suddenly changes, the semi-automatic through-stop valve is controlled to close an oil circuit, and because the semi-automatic through-stop valve is positioned between the reversing valve and the check valve, after the oil circuit is closed by the semi-automatic through-stop valve, the oil circuit between the reversing valve and the hydraulic unit is closed without hydraulic action at the check valve, so that the relation between a main hydraulic circuit and a hydraulic cylinder with an accident is cut off, and a hydraulic system is protected from being damaged by the hydraulic cylinder with the accident;
2. through the arrangement of the first overflow valve, an overpressure protection effect is achieved on a vertical column oil lifting way from the check valve to the hydraulic cylinder;
3. through the setting of manual stop valve, after taking place the vehicle and dash the card striking, the stand that the oil pump is unable control and is collided goes up and down, opens manual stop valve this moment and alright unload the fluid of no pole intracavity and make the stand descend.
Drawings
Fig. 1 is a schematic diagram of main components for embodying a hydraulic system in the related art.
Fig. 2 is a layout diagram of a hydraulic system for embodying the protection of a hydraulic circuit of a roadblock machine in an embodiment of the present application.
Description of reference numerals: 1. an oil pump; 11. an oil filter; 2. an oil tank; 3. a diverter valve; 4. a double hydraulic control check valve; 5. a hydraulic cylinder; 51. a rodless cavity; 52. a rod cavity; 6. a hydraulic pressure sensor; 61. a warning light; 62. a buzzer; 7. a semi-automatic on-off valve; 8. a first overflow valve; 9. a second overflow valve; 10. manual stop valve.
Detailed Description
The present application is described in further detail below with reference to figures 1-2.
The embodiment of the application discloses a hydraulic circuit protection type hydraulic system of a roadblock machine, as shown in fig. 2, the hydraulic circuit protection type hydraulic system comprises a main hydraulic circuit and a plurality of hydraulic units which are connected to the main hydraulic circuit in parallel. The main hydraulic circuit comprises an oil tank 2, an oil filter 11, an oil pump 1 and a reversing valve 3 which are connected in sequence; a single hydraulic unit is used for controlling the lifting of one upright column, two hydraulic units are arranged in the embodiment, each hydraulic unit comprises a check valve and a hydraulic cylinder 5 which are connected with each other, and each hydraulic cylinder 5 comprises a rod cavity 52 and a rodless cavity 51. The oil starts from the oil tank 2, is filtered by the oil filter 11 and then is pumped to the reversing valve 3, the oil outlet and the oil return port of one side of the reversing valve 3, which is far away from the oil pump 1, are connected with three-way joints, the reversing valve 3 flows through a check valve through the three-way joints when outputting oil, and simultaneously supplies oil to the rodless cavity 51 or the rod cavity 52 of the hydraulic cylinder 5 in the two hydraulic units, and simultaneously the oil in the other cavity of the hydraulic cylinder 5 returns oil to the oil tank 2 from the oil return port of the reversing valve 3 through a pipeline and the other three-way joint.
As shown in fig. 2, the oil filter 11 is used to filter off particulate impurities entering the main hydraulic circuit, thereby smoothing the oil path and reducing damage to various elements in the oil path; the reversing valve 3 is a three-position four-way electromagnetic reversing valve and is used for changing the oil flow direction of an oil path of the hydraulic unit. The check valve is used to keep the hydraulic cylinder 5 in a relatively stable stationary state when the oil pump 1 is not operating.
In this embodiment, the check valve adopts double hydraulic control check valve 4, and double hydraulic control check valve 4 has A, B, C and four hydraulic fluid ports D, and when A or C department received positive oil pressure, the oil circuit between A and B, between C and D all switched on, when A and C do not all received positive oil pressure, any oil circuit in the valve all did not switch on, so the check valve adopts double hydraulic control check valve 4 can realize the two-way non return of pneumatic cylinder 5. In the oil path of a single hydraulic unit, B is communicated with the rodless cavity 51 of the hydraulic cylinder 5, D is communicated with the rod cavity 52, namely when the oil port A is opened by positive oil pressure to feed oil, hydraulic oil passes through the oil port B and then is filled into the rodless cavity 51, meanwhile, the oil path between C and D is communicated, the oil in the rod cavity 52 flows out of the hydraulic cylinder 5 and flows back to the oil tank 2 through the oil port C, and at the moment, the hydraulic cylinder 5 controls the upright column to ascend.
As shown in fig. 2, a semi-automatic open-close valve 7 is arranged between the reversing valve 3 and the oil port a of the double hydraulic control check valve 4, and a hydraulic sensor 6 is arranged on an oil path through which the oil port B of the double hydraulic control check valve 4 is communicated with the rodless cavity 51 of the hydraulic cylinder 5, and the hydraulic sensor 6 is connected with the semi-automatic open-close valve 7 through a circuit. Under the normal working state, the semi-automatic open-close valve 7 is in an open state; when the hydraulic sensor 6 detects sudden change of oil pressure in an oil circuit in the rising process of the upright column, a closing signal is sent to the semi-automatic through-stop valve 7, an oil inlet oil circuit between the reversing valve 3 and the double hydraulic control one-way valve 4 is closed, the pressure of an oil port A of the double hydraulic control one-way valve 4 disappears, the oil circuits A-B and the oil circuits D-C of the double hydraulic control one-way valve 4 are both closed, and at the moment, the connection between the hydraulic cylinder 5 and the main hydraulic circuit which are unexpected is cut off while the working states of other elements which normally work are unchanged, so that the influence of impact on a hydraulic system in the working state of the upright column of the roadblock machine is reduced.
As shown in fig. 2, each hydraulic unit is further electrically connected with a buzzer 62 and a warning lamp 61 through the hydraulic sensor 6, and when the hydraulic sensor 6 is triggered to work by the vehicle rushing to get stuck, the buzzer 62 and the warning lamp 61 give an alarm to safely remind a driver and pedestrians.
As shown in fig. 2, when the upright column jacks up the chassis of the automobile in the rising process, the semi-automatic check valve 7 is closed by a signal instruction, and at this time, a large pressure is formed in the oil path between the double hydraulic control check valve 4 and the rodless cavity 51 of the hydraulic cylinder 5, so that a first overflow valve 8 is arranged between the rodless cavity 51 of the hydraulic cylinder 5 and the double hydraulic control check valve 4 of each hydraulic unit, and when the oil pressure between the double hydraulic control check valve 4 and the rodless cavity 51 of the hydraulic cylinder 5 is too large, the first overflow valve 8 discharges the excessive oil pressure through oil drainage to protect the oil path therein; since the first relief valve 8 does not completely discharge the oil therein, the pillar and the underbody are still in a state of being in contact with each other, and the effect of intercepting the vehicle still remains.
As shown in fig. 2, the hydraulic cylinder 5 which is unexpected is separated from the main hydraulic circuit which normally works by the semi-automatic stop valve 7, the oil pump 1 normally outputs oil pressure energy, and the output end of the oil pressure energy is reduced, so that the oil pressure in the hydraulic system is increased, a second overflow valve 9 is arranged between the oil pump 1 and the reversing valve 3, the second overflow valve 9 can discharge the excessive oil pressure in the oil circuit, and the influence of pressure floating on the working state of the main hydraulic circuit is reduced.
As shown in fig. 2, a manual stop valve 10 is provided between the rodless cavity 51 of the hydraulic cylinder 5 of each hydraulic unit and the double hydraulic control check valve 4, after the oil passage is closed by the semi-automatic open-close valve 7, the oil in the rodless cavity 51 can be discharged through the manual stop valve 10 to lower the column of the roadblock machine, the semi-automatic open-close valve 7 is opened after the maintenance, installation and debugging of the column and the hydraulic cylinder 5 are completed, and the hydraulic cylinder 5 can be driven by the oil pump 1 to normally work again. The oil outlets of the first overflow valve 8, the second overflow valve 9 and the manual stop valve 10 are all communicated with the oil tank 2.
The implementation principle of the hydraulic circuit protection type hydraulic system of the roadblock machine in the embodiment of the application is as follows:
when a vehicle is forcedly jammed in the rising process of the upright post of the roadblock machine, the top of the upright post collides with a vehicle bottom plate, hydraulic pressure in a rodless cavity 51 of the hydraulic cylinder 5 rises sharply, the hydraulic sensor 6 is triggered to transmit a signal to enable the semi-automatic check valve 7 to close an oil inlet passage of the hydraulic cylinder 5, an oil inlet of the double-hydraulic-control check valve 4 loses pressure effect to close a passage between the hydraulic cylinder 5 and a main hydraulic circuit, the hydraulic cylinder 5 cannot obtain oil pressure output provided by the oil pump 1 to stop moving, and the first overflow valve 8 can reduce damage of excessive oil pressure to an oil passage at the position through discharging the oil. Because each hydraulic cylinder 5 corresponds to the independent double hydraulic control one-way valve 4, the hydraulic sensor 6 and the semi-automatic through-stop valve 7, the connection between the hydraulic cylinder 5 corresponding to the upright post with the impact accident and the main circuit is cut off, so that the normal working state of each element of the main circuit and other hydraulic cylinders 5 cannot be influenced. The second relief valve 9 can maintain the hydraulic pressure in the main hydraulic circuit at a suitable level to reduce the damage to the oil circuit caused by pressure variations therein.
After the accident is relieved, the piston rod of the hydraulic cylinder 5 returns to the column retraction state by opening the manual stop valve 10 to discharge the oil liquid in the rodless cavity 51, and then the hydraulic cylinder 5 at the position can return to the normal working state by manually opening the semi-automatic stop valve 7.
The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. The utility model provides a roadblock machine hydraulic circuit protection type hydraulic system, includes main hydraulic circuit and a plurality of hydraulic unit that connect in parallel on main hydraulic circuit, main hydraulic circuit includes oil tank (2), oil pump (1) and switching-over valve (3), each hydraulic unit all includes check valve and a pneumatic cylinder (5), every a stand is controlled in pneumatic cylinder (5) and goes up and down, pneumatic cylinder (5) include rodless chamber (51) and have pole chamber (52), its characterized in that: the hydraulic unit further comprises a hydraulic sensor (6) and a semi-automatic open-close valve (7), the hydraulic sensor (6) is located between the check valve and the rodless cavity (51), the semi-automatic open-close valve (7) is located between the reversing valve (3) and the check valve, the semi-automatic open-close valve (7) is located on an oil path communicated with the rodless cavity (51), and the hydraulic sensor (6) is electrically connected with the semi-automatic open-close valve (7).
2. The hydraulic circuit protection hydraulic system of claim 1, wherein: and a manual stop valve (10) is arranged between the check valve and the rodless cavity (51).
3. The hydraulic circuit protection hydraulic system of claim 1, wherein: and a first overflow valve (8) is arranged between the check valve and the rodless cavity (51).
4. The hydraulic circuit protection hydraulic system of claim 1, wherein: the check valve is a double-hydraulic control check valve (4).
5. The hydraulic circuit protection hydraulic system of claim 1, wherein: still include warning light (61), warning light (61) are connected with hydraulic pressure sensor (6) electricity.
6. The hydraulic circuit protection hydraulic system of claim 1, wherein: the hydraulic control system further comprises a buzzer (62), wherein the buzzer (62) is electrically connected with the hydraulic sensor (6).
7. The hydraulic circuit protection hydraulic system of claim 1, wherein: and a second overflow valve (9) is arranged between the oil pump (1) and the reversing valve (3).
8. The hydraulic circuit protection hydraulic system of claim 1, wherein: an oil filter (11) is arranged between the oil tank (2) and the oil pump (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023040560.XU CN213899440U (en) | 2020-12-16 | 2020-12-16 | Hydraulic circuit protection type hydraulic system of roadblock machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023040560.XU CN213899440U (en) | 2020-12-16 | 2020-12-16 | Hydraulic circuit protection type hydraulic system of roadblock machine |
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| Publication Number | Publication Date |
|---|---|
| CN213899440U true CN213899440U (en) | 2021-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202023040560.XU Active CN213899440U (en) | 2020-12-16 | 2020-12-16 | Hydraulic circuit protection type hydraulic system of roadblock machine |
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| CN (1) | CN213899440U (en) |
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- 2020-12-16 CN CN202023040560.XU patent/CN213899440U/en active Active
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