After-loading lifting compression hydraulic-electric system

Abstract

The utility model discloses an after-loading lifting compression hydraulic-electric system. The rear loading lifting compression hydraulic-electric system comprises an oil tank and a plurality of lifting oil cylinders, the oil tank is connected with a first oil pump and a second oil pump, the first oil pump and the second oil pump are connected with a valve block, one side of the valve block is provided with a first electromagnetic reversing valve, and the first electromagnetic reversing valve is connected with the first oil pump to control the lifting oil cylinders to work. The other side of the valve block is provided with a second oil inlet way and a second oil return way, the oil inlet end of the second oil inlet way is connected with the second oil pump, the oil outlet end of the second oil inlet way is a compression box oil inlet connector, the oil inlet end of the second oil return way is a compression box oil return connector, and the oil outlet end of the second oil return way is communicated with the oil tank. And an electromagnetic overflow valve is arranged between the second oil inlet path and the second oil return path. The utility model solves the problem of high cost investment in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic pressure, in particular to a rear-loading vehicle lifting compression hydraulic and electric system. Background Art

[0002] Garbage compression trucks are generally sanitation equipment modified from special vehicle chassis, and generally have garbage loading, garbage unloading, single garbage compression, and continuous garbage compression functions. Due to the large size of garbage compression trucks, they are not suitable for running through streets and alleys, and need to stay at garbage transfer stations to wait for loading. In order to ensure that the garbage collected at the garbage transfer station can be transferred in time, a garbage transfer station needs to be equipped with multiple garbage compression trucks, which is costly. Utility Model Content

[0003] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a post-loading vehicle lifting and compression hydraulic-electric system that can not only ensure the timely transfer of garbage collected at a garbage transfer station, but also reduce cost investment.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the after-loading vehicle lifting compression hydraulic and electric system of the utility model is:

[0005] A post-loading vehicle lifting compression hydraulic-electric system includes an oil tank and a plurality of lifting cylinders, the oil tank is connected to a first oil pump and a second oil pump, the first and second oil pumps are connected to a valve block, a first electromagnetic reversing valve is arranged on one side of the valve block, the first electromagnetic reversing valve and the first oil pump are connected to control the operation of the lifting cylinder, a second oil inlet circuit and a second oil return circuit are opened on the other side of the valve block, the oil inlet end of the second oil inlet circuit is connected to the second oil pump, the oil outlet end of the second oil inlet circuit is a compression box oil inlet interface, the oil inlet end of the second oil return circuit is a compression box oil return interface, the oil outlet end of the second oil return circuit is connected to the oil tank, and an electromagnetic overflow valve is arranged between the second oil inlet circuit and the second oil return circuit.

[0006] Preferably, the first solenoid reversing valve is an H-type three-position four-way solenoid reversing valve, the P oil port of the H-type three-position four-way solenoid reversing valve is connected to the first oil pump through the first oil inlet circuit, the T oil port of the H-type three-position four-way solenoid reversing valve is connected to the oil tank through the first oil return circuit, a first overflow valve is arranged between the first oil inlet circuit and the first oil return circuit, the A oil port of the H-type three-position four-way solenoid reversing valve is connected to the rod chamber of each lifting cylinder through the first lifting oil circuit via the manifold, and the B oil port of the H-type three-position four-way solenoid reversing valve is connected to the rodless chamber of each lifting cylinder through the second lifting oil circuit via the synchronous motor.

[0007] Preferably, one-way throttle valves are provided on the first and second lifting oil circuits.

[0008] Preferably, a one-way hydraulic lock is provided on the second lifting oil circuit.

[0009] Preferably, an oil cooling fan is provided on the first oil return line. The first oil pump and the oil cooling fan are operated to keep both ends of the H-type three-position four-way electromagnetic reversing valve de-energized to cool the hydraulic oil in the oil tank.

[0010] Preferably, the electromagnetic relief valve is composed of a second relief valve and an H-type two-position two-way electromagnetic valve.

[0011] Compared with the prior art, the utility model has the following advantages:

[0012] A plurality of pits are set up in the same garbage transfer station for installing the utility model. When the garbage compression vehicle enters a pit, the lifting cylinder is controlled by the first electromagnetic reversing valve and the first oil pump of the pit to unload the empty compression box from the special vehicle chassis. The hydraulic system of the compression box is connected with the oil inlet interface and the oil return interface of the compression box, so that the garbage compression work can be carried out. At the same time, the special vehicle chassis can enter another pit full of garbage. The lifting cylinder is controlled by the first electromagnetic reversing valve and the first oil pump of the pit to load the full compression box onto the special vehicle chassis. The oil source on the special vehicle chassis supplies oil to the hydraulic system of the compression box, and the garbage in the full compression box is dumped into the garbage treatment station. In this way, multiple compression boxes can share one special vehicle chassis, which reduces the cost investment on the basis of ensuring the timely transportation and collection of garbage at the garbage transfer station. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is the principle diagram of the after-loading vehicle lifting compression hydraulic and electric system of the utility model;

[0014] Figure 2 yes Figure 1 Enlarged view of point C;

[0015] Figure 3 This is the principle structure diagram of the electromagnetic overflow valve.

[0016] Among them, 1 oil tank, 11 first oil pump, 111 first motor, 12 second oil pump, 121 second motor, 2 lifting cylinder, 3 valve block, 31 first oil inlet, 32 first oil return, 33 first lifting oil, 331 manifold, 34 second lifting oil, 341 synchronous motor, 35 second oil inlet, 36 second oil return, 37 compression box oil inlet interface, 38 compression box oil return interface, 4 first solenoid reversing valve, 5 oil cooling fan, 6 first overflow valve, 7 one-way throttle valve, 8 one-way hydraulic lock, 9 solenoid overflow valve, 91 second overflow valve, 92H type two-position two-way solenoid valve. DETAILED DESCRIPTION

[0017] The present invention is further explained below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that these implementation methods are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0018] like Figure 1-3 As shown, a post-loading vehicle lifting compression hydraulic and electric system includes an oil tank 1 and four lifting cylinders 2. The oil tank is connected to a first oil pump 11 and a second oil pump 12. The first and second oil pumps are connected to a valve block 3. A first electromagnetic reversing valve 4 is installed on the left side of the valve block. The first electromagnetic reversing valve and the first oil pump are connected to control the operation of the lifting cylinder. The first electromagnetic reversing valve is an H-type three-position four-way electromagnetic reversing valve. The P oil port of the H-type three-position four-way electromagnetic reversing valve is connected to the first oil pump through a first oil inlet 31. The H-type three-position four-way electromagnetic reversing valve The T oil port of the valve is connected to the oil tank through the first oil return line 32. An oil cooling fan 5 is installed on the first oil return line to cool the hydraulic oil in time to ensure the normal operation of the oil circuit. A first overflow valve 6 is installed between the first oil inlet line and the first oil return line. A one-way throttle valve 7 is installed on the first and second lifting oil circuits to adjust the oil circuit flow rate, thereby adjusting the action speed of the lifting cylinder. For example, when lifting an empty compression box, the speed of extending and retracting the telescopic rod of the lifting cylinder can be accelerated to improve work efficiency. When lifting a fully loaded compression box, When the box is lifted, the extension and retraction speed of the telescopic rod of the lifting cylinder is slowed down to improve safety. A one-way hydraulic lock 8 is installed on the second lifting oil circuit to improve safety when the compression box is lifted. The A oil port of the H-type three-position four-way electromagnetic reversing valve is connected to the rod chamber of each lifting cylinder through the first lifting oil circuit 33 via the manifold 331, and the B oil port of the H-type three-position four-way electromagnetic reversing valve is connected to the rodless chamber of each lifting cylinder through the second lifting oil circuit 34 via the synchronous motor 341. The synchronous motor can improve the four lifting To ensure the synchronization of the lifting cylinder action and avoid jamming, a second oil inlet 35 and a second oil return 36 are opened on the right side of the valve block. The oil inlet end of the second oil inlet is connected to the second oil pump, the oil outlet end of the second oil inlet is the compression box oil inlet interface 37, the oil inlet end of the second oil return is the compression box oil return interface 38, the oil outlet end of the second oil return is connected to the oil tank, and an electromagnetic overflow valve 9 is arranged between the second oil inlet and the second oil return, and the electromagnetic overflow valve is composed of a second overflow valve 91 and an H-type two-position two-way electromagnetic valve 92.

[0019] The specific working process and principle of the utility model are as follows: the setting pressure of the first overflow valve is 16Mpa, the setting pressure of the second overflow valve is 20Mpa, and the setting pressure of the overflow valve in the synchronous motor is 18Mpa.

[0020] The unloaded garbage compactor enters the pit, starts the first motor 111 connected to the first oil pump, and the DT1 end of the H-type three-position four-way solenoid reversing valve is energized. The hydraulic oil in the oil tank is evenly distributed into the rodless chambers of the four lifting cylinders through the PB oil port, the one-way hydraulic lock, and the one-way throttle valve by the synchronous motor. The telescopic rods of the four lifting cylinders are extended at the same time. After the unloaded compression box is lifted, the special vehicle chassis is evacuated from the pit, and the DT2 end of the H-type three-position four-way solenoid reversing valve is energized. The hydraulic oil in the oil tank is evenly distributed into the rod chambers of the four lifting cylinders through the PA oil port and the one-way throttle valve by the manifold. The telescopic rods of the four lifting cylinders are retracted at the same time. After the unloaded compression box falls into the pit, the first motor is turned off, DT1 and DT2 are both de-energized, and the unloaded compression box is automatically The hydraulic system is connected to the oil inlet interface and the oil return interface of the compression box, and the second motor 121 connected to the second oil pump at the pit is started, and the hydraulic system of the compression box is powered on. When DT3 of the H-type two-position two-way solenoid valve is energized, the compression box can compress the garbage until the compression box is full of garbage, and then DT3 of the H-type two-position two-way solenoid valve loses power. Two seconds after DT3 loses power, the second motor is turned off. When the compression box is compressing the garbage, the special vehicle chassis can deliver the fully loaded compression boxes of other pits to the garbage disposal station, and bring the empty compression boxes back and put them into the empty pit. In this way, multiple compression boxes can share one special vehicle chassis, which reduces the cost investment while ensuring the timely transportation and collection of garbage at the garbage transfer station.

Claims

1. A post-loading vehicle lifting compression hydraulic and electric system, characterized in that: It includes an oil tank and a plurality of lifting cylinders. The oil tank is connected to a first oil pump and a second oil pump. The first and second oil pumps are connected to a valve block. A first electromagnetic reversing valve is arranged on one side of the valve block. The first electromagnetic reversing valve and the first oil pump are connected to control the operation of the lifting cylinder. A second oil inlet circuit and a second oil return circuit are arranged on the other side of the valve block. The oil inlet end of the second oil inlet circuit is connected to the second oil pump. The oil outlet end of the second oil inlet circuit is a compression box oil inlet interface. The oil inlet end of the second oil return circuit is a compression box oil return interface. The oil outlet end of the second oil return circuit is connected to the oil tank. An electromagnetic overflow valve is arranged between the second oil inlet circuit and the second oil return circuit.

2. The after-loading vehicle lifting compression hydraulic and electric system according to claim 1 is characterized in that: The first solenoid reversing valve is an H-type three-position four-way solenoid reversing valve, the P oil port of the H-type three-position four-way solenoid reversing valve is connected to the first oil pump through the first oil inlet circuit, the T oil port of the H-type three-position four-way solenoid reversing valve is connected to the oil tank through the first oil return circuit, a first overflow valve is arranged between the first oil inlet circuit and the first oil return circuit, the A oil port of the H-type three-position four-way solenoid reversing valve is connected to the rod chamber of each lifting cylinder through the first lifting oil circuit via the manifold, and the B oil port of the H-type three-position four-way solenoid reversing valve is connected to the rodless chamber of each lifting cylinder through the second lifting oil circuit via the synchronous motor.

3. The after-loading vehicle lifting compression hydraulic and electric system according to claim 2 is characterized in that: One-way throttle valves are arranged on the first and second lifting oil circuits.

4. The after-loading vehicle lifting compression hydraulic and electric system according to claim 3 is characterized in that: The second lifting oil circuit is provided with a one-way hydraulic lock.

5. The after-loading vehicle lifting compression hydraulic and electric system according to claim 1 is characterized in that: An oil cooling fan is arranged on the first oil return line.

6. The after-loading vehicle lifting compression hydraulic and electric system according to claim 1 is characterized in that: The electromagnetic overflow valve is composed of a second overflow valve and an H-type two-position two-way electromagnetic valve.

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