Integrated block assembly device

Abstract

The utility model discloses an integrated block assembly device which comprises an integrated block, a three-position four-way reversing valve and a two-position four-way reversing valve, and an oil inlet path, an oil return path, a first working oil path, a second working oil path and a third working oil path are arranged on the integrated block. A total oil inlet, a total oil return opening, a first working oil opening, a second working oil opening and a third working oil opening are formed in the integrated block; an oil inlet of the three-position four-way reversing valve is connected with the oil inlet oil way, an oil return opening of the three-position four-way reversing valve is connected with the oil return oil way, a first oil outlet and a second oil outlet of the three-position four-way reversing valve are connected with the first working oil way and the second working oil way respectively, a first oil inlet of the two-position four-way reversing valve is connected with the first working oil way, and a second oil inlet of the two-position four-way reversing valve is connected with the second working oil way. The oil outlet is connected with the third working oil way, and the oil return opening is connected with the oil return way. According to the integrated block assembly device, synchronous control over the push plate and spiral discharging of the motor sweeper can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic control, in particular to an integrated block assembly device. Background Art

[0002] A road sweeper, also known as a sweeper or cleaning vehicle, is a special vehicle used for cleaning roads, squares and other areas.

[0003] A street sweeper usually includes a garbage bin for storing garbage, and a push plate and a spiral unloading device for unloading garbage. The unloading process of a street sweeper is usually as follows: first, the vehicle stops at the unloading point and prepares to unload. The push plate pushes the garbage from the front end of the garbage bin backwards under the drive of the push plate cylinder. At the same time, the spiral unloading motor of the spiral unloading device starts, and the spiral blades rotate to push the pushed garbage to the unloading port. During this process, the push plate continuously feeds material, and the spiral device stirs, guides and compacts the garbage to prevent blockage. Finally, the push plate returns to the initial position after pushing the remaining garbage to complete the unloading.

[0004] The push plate and spiral unloading motor of the existing sweeper are usually controlled separately, which may cause the problem of inconsistency between the pushing speed and the unloading speed. It is easy to overload or no-load, causing damage to the push plate cylinder or the spiral unloading motor, and may also cause the box to be damaged due to pressure. Summary of the invention

[0005] In order to overcome the above-mentioned defects of the prior art, the utility model provides an integrated block assembly device for realizing synchronous control of a push plate and a spiral unloading of a sweeper.

[0006] The utility model discloses an integrated block assembly device, comprising an integrated block, a three-position four-way reversing valve and a two-position four-way reversing valve connected to the integrated block, wherein the integrated block is provided with an oil inlet circuit, an oil return circuit, a first working oil circuit, a second working oil circuit and a third working oil circuit, and the integrated block is provided with a total oil inlet connected to the oil inlet circuit, a total oil return connected to the oil return circuit, a first working oil port connected to the first working oil circuit, a second working oil port connected to the second working oil circuit, and a third working oil port connected to the third working oil circuit. The third working oil port connected to the three working oil circuits; the three-position four-way reversing valve includes an oil inlet, an oil return port, a first oil outlet, and a second oil outlet. The oil inlet of the three-position four-way reversing valve is connected to the oil inlet oil circuit, the oil return port of the three-position four-way reversing valve is connected to the oil return oil circuit, the first oil outlet and the second oil outlet of the three-position four-way reversing valve are respectively connected to the first working oil circuit and the second working oil circuit. The three-position four-way reversing valve has three working states. In the first working state, the oil inlet, the oil return port, the first oil outlet , the second oil outlet is disconnected, in the second working state, the oil inlet is connected to the first oil outlet, the oil return port is connected to the second oil outlet, in the third working state, the oil inlet is connected to the second oil outlet, and the oil return port is connected to the first oil outlet; the two-position four-way reversing valve includes a first oil inlet, a second oil inlet, an oil return port, and an oil outlet, the first oil inlet of the two-position four-way reversing valve is connected to the first working oil circuit, the second oil inlet is connected to the second working oil circuit, and the oil outlet of the two-position four-way reversing valve is connected to the third working oil circuit The oil return port of the two-position four-way reversing valve is connected to the oil return oil circuit. When the two-position four-way reversing valve is working, the internal oil flow produces pressure changes. This port connection can solve the problem of poor pressure bearing capacity of the internal guide sleeves of the electromagnet guide sleeves at both ends of the reversing valve, and prevent problems such as valve core sticking due to poor pressure bearing capacity of the guide sleeves. The two-position four-way reversing valve has two working states. In the first working state, only the first oil inlet and the oil outlet are connected, and in the second working state, only the second oil inlet and the oil outlet are connected.

[0007] The control oil inlet and the first working oil circuit or the second working oil circuit that can be switched by the three-position four-way reversing valve can be connected or disconnected, so as to control the push plate cylinder to drive the push plate to push out, retract or stop the movement. The first working oil circuit and the third working oil circuit or the second working oil circuit that can be switched by the two-position four-way reversing valve can be connected, so that the spiral unloading motor can be controlled to work when the push plate is controlled to push and retract, thereby realizing the simultaneous control of the push plate and the unloading motor. This design helps to ensure that the pushing speed and the unloading speed are consistent, avoids damage to the push plate cylinder or the unloading motor or pressure damage to the box body due to overload or no load, and makes the operation more convenient. In addition, the three-position four-way directional valve and the two-position four-way directional valve are connected through the oil circuit on the integrated block, which has a simple and compact structure and is convenient for disassembly, assembly and replacement of the directional valve.

[0008] Furthermore, it also includes a first overflow valve connected to the integrated block, the oil inlet of the first overflow valve is connected to the third working oil circuit, and the oil outlet of the first overflow valve is connected to the return oil circuit, which can limit the maximum working pressure of the unloading motor and protect the safe operation of the unloading motor.

[0009] Furthermore, it also includes a second relief valve connected to the integrated block, the oil inlet of the second relief valve is connected to the oil inlet oil circuit, the oil outlet of the second relief valve is connected to the oil return oil circuit, and the set pressure of the second relief valve is greater than the set pressure of the first relief valve. The second relief valve can limit the pressure of normal operation of the system, and as the last line of defense of the system pressure, it limits the pressure below its set pressure, prevents the maximum operating pressure of the reversing valve and hydraulic actuator in the system, prevents the system from being seriously damaged due to excessive pressure, and further ensures the safety of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a front view of an embodiment of the utility model;

[0011] Figure 2 A side view of an embodiment of the utility model;

[0012] Figure 3 This is a schematic diagram of the oil circuit connection of an embodiment of the utility model;

[0013] Figure 4 This is a schematic diagram of a three-position four-way electromagnetic reversing valve according to an embodiment of the utility model;

[0014] Figure 5 Schematic diagram of a two-position four-way electromagnetic reversing valve according to an embodiment of the utility model DETAILED DESCRIPTION

[0015] The structure of an integrated block assembly device according to an embodiment of the utility model is as follows Figure 1-5 As shown, it includes an integrated block 1, a three-position four-way reversing valve 2 and a two-position four-way reversing valve 3 connected to the integrated block 1, the integrated block 1 is provided with an oil inlet circuit 11, an oil return circuit 12, a first working oil circuit 13, a second working oil circuit 14 and a third working oil circuit 15, and the integrated block 1 is provided with a total oil inlet port 110 connected to the oil inlet circuit 11, a total oil return port 120 connected to the oil return circuit 12, a first working oil port 130 connected to the first working oil circuit 13, a second working oil port 140 connected to the second working oil circuit 14, and a third working oil port 150 connected to the third working oil circuit 15.

[0016] like Figure 3 , 4 As shown, the three-position four-way reversing valve 2 includes an oil inlet, an oil return port, a first oil outlet, and a second oil outlet. The oil inlet of the three-position four-way reversing valve 2 is connected to the oil inlet oil circuit 11, the oil return port of the three-position four-way reversing valve 2 is connected to the oil return oil circuit 12, and the first oil outlet and the second oil outlet of the three-position four-way reversing valve 2 are connected to the first working oil circuit 13 and the second working oil circuit 14, respectively.

[0017] The three-position four-way reversing valve 2 has three working states. In the first working state, the oil inlet, the oil return port, the first oil outlet, and the second oil outlet are all disconnected. In the second working state, the oil inlet is connected to the first oil outlet, and the oil return port is connected to the second oil outlet. In the third working state, the oil inlet is connected to the second oil outlet, and the oil return port is connected to the first oil outlet.

[0018] like Figure 3 , 5 As shown, the two-position four-way reversing valve 3 includes a first oil inlet, a second oil inlet, an oil return port, and an oil outlet. The first oil inlet of the two-position four-way reversing valve 3 is connected to the first working oil circuit 13, the second oil inlet is connected to the second working oil circuit 14, the oil outlet of the two-position four-way reversing valve 3 is connected to the third working oil circuit 15, and the oil return port of the two-position four-way reversing valve 3 is connected to the oil return circuit 12. When the two-position four-way reversing valve 3 is working, the internal oil flow produces a pressure change, and this port is connected to release the oil pressure. In order to solve the problem of poor pressure bearing capacity of the guide sleeves inside the electromagnet guide sleeves at both ends of the reversing valve and prevent problems such as valve core sticking due to poor pressure bearing capacity of the guide sleeves, the two-position four-way reversing valve 3 has two working states. In the first working state, only the first oil inlet and the oil outlet are connected. In the second working state, only the second oil inlet and the oil outlet are connected, and the first working oil circuit 13 and the third working oil circuit 15 or the second working oil circuit 14 and the third working oil circuit 15 can be switched to achieve connection.

[0019] During implementation, the main oil inlet 110 on the integrated block 1 is connected to a pressure source (such as an oil pump), the main oil return port 120 is connected to the oil tank, the rod chamber and the rodless chamber of the push plate oil cylinder are connected to the first working oil port 130 and the second working oil port 140 of the integrated block 1, and the unloading motor is connected to the third working oil port 150 of the integrated block 1. The three-position four-way reversing valve 2 can switch the control oil inlet circuit 11 and the first working oil circuit 13 or the second working oil circuit 14 to be connected or disconnected, so as to control the push plate oil cylinder to drive the push plate to push out, retract or stop moving. The two-position four-way reversing valve 3 can be switched to connect the first working oil circuit 13 and the third working oil circuit 15 or the second working oil circuit 14 and the third working oil circuit 15, so that when the push plate is controlled to push and retract, the spiral unloading motor can also be controlled to work at the same time, realizing the simultaneous control of the push plate and the unloading motor. This design helps to ensure that the pushing speed and the unloading speed are consistent, avoiding problems such as damage to the push plate cylinder or the unloading motor or damage to the box body due to overload or no load, and also makes the operation more convenient. In addition, the three-position four-way reversing valve 2 and the two-position four-way reversing valve 3 are connected through the oil circuit on the integrated block 1, which has a simple and compact structure and is convenient for disassembly, assembly and replacement of the reversing valve.

[0020] In addition, it also includes a first relief valve 4 and a second relief valve 5 connected to the integrated block 1. The oil inlet of the first relief valve 4 is connected to the third working oil circuit 15, and the oil outlet of the first relief valve 4 is connected to the return oil circuit 12. The first relief valve 4 can release pressure in time when the pressure in the third working oil circuit 15 is too high, which can limit the maximum working pressure of the unloading motor and protect the safe operation of the unloading motor.

[0021] The oil inlet of the second relief valve 5 is connected to the oil inlet circuit, the oil outlet of the second relief valve 5 is connected to the oil return circuit 12, and the set pressure of the second relief valve 5 is greater than the set pressure of the first relief valve 4. The second relief valve 5 can limit the pressure of the normal operation of the system, and as the last line of defense of the system pressure, it limits the pressure below its set pressure, prevents the maximum operating pressure of the reversing valve and hydraulic actuator in the system, prevents the system from being seriously damaged due to excessive pressure, and further ensures the safety of the system.

[0022] The above-mentioned three-position four-way directional control valve 2 adopts a double electromagnetic directional control valve, and the two-position four-way directional control valve 3 adopts a single electromagnetic directional control valve (the valve core is reset by a spring).

[0023] The above embodiment is only one of the preferred specific embodiments of the present invention. Common changes and substitutions made by those skilled in the art within the technical solution of the present invention are all included in the protection scope of the present invention.

Claims

1. An integrated block assembly device, characterized in that: The invention comprises an integrated block, a three-position four-way reversing valve and a two-position four-way reversing valve connected to the integrated block, wherein the integrated block is provided with an oil inlet circuit, an oil return circuit, a first working oil circuit, a second working oil circuit and a third working oil circuit, and the integrated block is provided with a total oil inlet connected to the oil inlet circuit, a total oil return connected to the oil return circuit, a first working oil port connected to the first working oil circuit, a second working oil port connected to the second working oil circuit for working, and a third working oil port connected to the third working oil circuit; the oil inlet of the three-position four-way reversing valve is connected to the oil inlet circuit, the oil return port of the three-position four-way reversing valve is connected to the oil return circuit, the first oil outlet and the second oil outlet of the three-position four-way reversing valve are connected to the first working oil circuit and the second working oil circuit respectively, and the three-position four-way reversing valve is provided with a total oil inlet connected to the oil inlet circuit, a total oil return connected to the oil return circuit, a first working oil port connected to the first working oil circuit, a second working oil port connected to the second working oil circuit for working, and a third working oil port connected to the third working oil circuit. The valve has three working states. In the first working state, the oil inlet, the oil return port, the first oil outlet and the second oil outlet are all disconnected. In the second working state, the oil inlet and the first oil outlet are connected, and the oil return port and the second oil outlet are connected. In the third working state, the oil inlet and the second oil outlet are connected, and the oil return port and the first oil outlet are connected. The first oil inlet of the two-position four-way reversing valve is connected to the first working oil circuit, the second oil inlet is connected to the second working oil circuit, the oil outlet of the two-position four-way reversing valve is connected to the third working oil circuit, and the oil return port of the two-position four-way reversing valve is connected to the return oil circuit. The two-position four-way reversing valve has two working states. In the first working state, only the first oil inlet and the oil outlet are connected. In the second working state, only the second oil inlet and the oil outlet are connected.

2. The integrated block assembly device according to claim 1, characterized in that: The utility model comprises a first overflow valve connected with the integrated block, the oil inlet of the first overflow valve is connected with the third working oil circuit, and the oil outlet of the first overflow valve is connected with the oil return circuit.

3. The integrated block assembly device according to claim 2, characterized in that: It includes a second overflow valve connected to the integrated block, the oil inlet of the second overflow valve is connected to the oil inlet oil circuit, the oil outlet of the second overflow valve is connected to the oil return oil circuit, and the set pressure of the second overflow valve is greater than the set pressure of the first overflow valve.

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