Integral type get-off multi-way reversing valve

Abstract

The utility model discloses an integral type unloading multi-way reversing valve which comprises an integral type valve body, an oil inlet P, an oil return opening T, an oil passing reversing valve, a main reversing valve and four selective reversing valves, and the oil inlet P is sequentially connected with the oil passing reversing valve, the main reversing valve, a through unloading oil channel of the four selective reversing valves on the rear side and the oil return opening T; one working oil port of the main reversing valve is connected with a main working oil port A of the valve body, and the other working oil port of the main reversing valve is connected with oil inlets of the four selective reversing valves; the oil inlet P is further connected with an oil inlet of an oil passing reversing valve through a one-way valve, one working oil port of the oil passing reversing valve is connected with a loading oil port V of the valve body, the other working oil port of the oil passing reversing valve is connected with an oil inlet of a main reversing valve, and an oil return port of the main reversing valve is connected with an oil return port T; under the condition that the using condition of the lower vehicle valve is met, oil can be supplied to the upper vehicle valve, misoperation on the lower vehicle valve when the upper vehicle valve works is prevented, use is convenient, and safety is good.

Description

Technical Field

[0001] The utility model relates to a vehicle getting off valve, in particular to an integral vehicle getting off multi-way reversing valve. Background Art

[0002] The dismounting valve currently used for truck-mounted cranes or small cranes is used to control the extension and retraction of the four horizontal oil cylinders and four outrigger oil cylinders of the dismounting crane, so as to support the load of the whole machine during operation. The existing dismounting valve includes a valve body, an oil inlet P, an oil return port T, a main reversing valve and four selective reversing valves. It only supplies oil to the four horizontal oil cylinders and the four outrigger oil cylinders, but the truck-mounted crane or small crane is also provided with an onboard valve for controlling some hydraulic parts of the onboard (such as telescopic arms), and a separate oil source needs to be provided for it, which is inconvenient to use. Summary of the invention

[0003] The purpose of the utility model is to provide an integral multi-way reversing valve for getting off the vehicle in view of the above-mentioned deficiencies in the prior art. After the conditions for using the getting off valve are met, the valve can also supply oil to the getting on valve and prevent misoperation of the getting off valve when the getting on valve is working. The utility model is easy to use and has good safety.

[0004] In order to achieve the above-mentioned purpose, the utility model is an integrated multi-way reversing valve for getting off a vehicle, comprising an integrated valve body, an oil inlet P, an oil return port T, a main reversing valve and four selective reversing valves arranged in the valve body, the central unloading oil passage of the main reversing valve is connected with the central unloading oil passages and the oil return port T of the four selective reversing valves at the rear side in sequence, one working oil port of the main reversing valve is connected with the main working oil port A of the valve body, and the other working oil port of the main reversing valve is connected with the oil inlet of the four selective reversing valves. are all connected; it is characterized in that: an oil-through reversing valve is provided between the oil inlet P and the main reversing valve, the oil inlet P is connected with the central unloading oil passage of the oil-through reversing valve and the central unloading oil passage of the main reversing valve in sequence, the oil inlet P is also connected with the oil inlet of the oil-through reversing valve through a one-way valve, a working oil port of the oil-through reversing valve is connected with the on-vehicle oil port V of the valve body, the other working oil port of the oil-through reversing valve is connected with the oil inlet of the main reversing valve, and the oil return port of the main reversing valve is connected with the oil return port T.

[0005] When the oil-passing reversing valve of the utility model is in one working position, the oil inlet of the main reversing valve is supplied with oil, and the slide valve position of the corresponding selective reversing valve is adjusted so that the corresponding horizontal oil cylinder for getting off the vehicle and the outrigger oil cylinder are extended to perform operation; after the outrigger oil cylinder for getting off the vehicle is in place, the slide valve of the oil-passing reversing valve is operated to another working position, and the on-vehicle valve is supplied with oil through the on-vehicle oil port V of the valve body, and no other oil source is needed, which is convenient to use, and at this time, the operating levers of the main reversing valve and the four selective reversing valves cannot perform reversing work, which can prevent the on-vehicle valve from being misoperated when the on-vehicle valve is working, and has good safety;

[0006] As a further improvement of the utility model, one working oil port of the main reversing valve is connected to the main working oil port A of the valve body through a hydraulically controlled one-way valve, and the control oil port of the hydraulically controlled one-way valve is connected to another working oil port of the main reversing valve; this can prevent the oil in the rod chamber of the horizontal oil cylinder and the outrigger oil cylinder from leaking and preventing creeping;

[0007] As a further improvement of the utility model, the oil inlet P is connected to the oil return port T through an adjustable relief valve; when the oil pressure is too high, the pressure can be released and the pressure relief pressure can be adjusted;

[0008] In summary, the utility model can supply oil to the onboard valve after satisfying the conditions for using the offboard valve, and prevent the onboard valve from being misoperated when the onboard valve is working, and is easy to use and safe. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is the front view of the embodiment of the utility model.

[0010] Figure 2 for Figure 1 Left view of .

[0011] Figure 3 The hydraulic principle diagram of the embodiment of the utility model. DETAILED DESCRIPTION

[0012] The utility model will be further described in detail below in conjunction with the accompanying drawings.

[0013] like Figures 1 to 3 As shown, an integral multi-way reversing valve for disembarking in this embodiment comprises an integral valve body 1, an oil inlet P and an oil return port T arranged in the valve body, an oil-passing reversing valve 2, a main reversing valve 3 and four selective reversing valves 4 arranged in sequence in the valve body, the oil inlet P is connected with the central unloading oil passage of the oil-passing reversing valve 2, the central unloading oil passage of the main reversing valve 3, the central unloading oil passages of the four selective reversing valves 4 at the rear side and the oil return port T in sequence, the oil inlet P is connected with the oil return port T through an adjustable relief valve 7, and the oil inlet P is also connected with the oil return port T through a one-way valve 5. The oil inlet of the oil-passing reversing valve 2 is connected, a working oil port of the oil-passing reversing valve 2 is connected to the vehicle oil port V of the valve body, the other working oil port of the oil-passing reversing valve 2 is connected to the oil inlet of the main reversing valve 3, a working oil port of the main reversing valve 3 is connected to the main working oil port A of the valve body through a hydraulically controlled one-way valve 6, the other working oil port of the main reversing valve 3 is connected to the oil inlets of the four selection reversing valves 4, and the other working oil port of the main reversing valve 3 is also connected to the control oil port of the hydraulically controlled one-way valve 6; the oil return port of the main reversing valve 3 is connected to the oil return port T.

[0014] When in use, the on-board oil port V of the valve body is connected with the oil inlet of the on-board valve, the two working oil ports A1-A4 and B1-B4 of the four selection reversing valves 4 are respectively connected with the rodless chambers of the four horizontal cylinders and the four outrigger cylinders, and the main working oil port A of the valve body is simultaneously connected with the rod chambers of the four horizontal cylinders and the four outrigger cylinders; the oil-passing reversing valve 2 of the utility model is a two-position six-way reversing valve, the sliding valve of which supplies oil to the oil inlet of the main reversing valve 3 when in one working position, and adjusts the sliding valve position of the corresponding selection reversing valve 4, and then operates the sliding valve of the main reversing valve 3, so that the corresponding disembarking horizontal cylinder and outrigger cylinder are extended, and lifting operations can be carried out; after the outrigger cylinder for disembarking is in place, the sliding valve of the oil-passing reversing valve 2 is operated to reverse to another working position, and the on-board valve is supplied with oil through the on-board oil port V of the valve body, without It is convenient to use other oil sources, and at this time the main reversing valve 3 is disconnected from the oil circuit, the oil in the two chambers of the horizontal oil cylinder and the outrigger oil cylinder is locked, and the control levers of the main reversing valve 3 and the four selective reversing valves 4 cannot perform reversing work, which can prevent the wrong operation of the disembarking valve when the getting on valve is working, and has good safety; when the four horizontal oil cylinders and the four outrigger oil cylinders need to be retracted, the oil reversing valve 2, the main reversing valve 3 and the four selective reversing valves 4 can be reversed again; the two working oil ports of the four selective reversing valves 4 are alternately used as the inlet when returning oil, and then the oil is returned through the working oil port, the return oil port and the return oil port T corresponding to the main reversing valve 3; the hydraulically controlled one-way valve 6 can prevent the oil in the rod chamber of the horizontal oil cylinder and the outrigger oil cylinder from leaking, and prevent creeping; the adjustable relief valve 7 can relieve pressure when the oil pressure is too high, and adjust the relief pressure.

Claims

1. An integral multi-way reversing valve for disembarking a vehicle, comprising an integral valve body, an oil inlet P, an oil return port T, a main reversing valve and four selective reversing valves arranged in the valve body, wherein the central unloading oil passage of the main reversing valve is connected in sequence with the central unloading oil passages and the oil return port T of the four selective reversing valves at the rear side, a working oil port of the main reversing valve is connected with the main working oil port A of the valve body, and the other working oil port of the main reversing valve is connected with the oil inlets of the four selective reversing valves; characterized in that: An oil-passing reversing valve is provided between the oil inlet P and the main reversing valve. The oil inlet P is connected with the center-through unloading oil passage of the oil-passing reversing valve and the center-through unloading oil passage of the main reversing valve in sequence. The oil inlet P is also connected with the oil inlet of the oil-passing reversing valve through a one-way valve. One working oil port of the oil-passing reversing valve is connected with the on-vehicle oil port V of the valve body. The other working oil port of the oil-passing reversing valve is connected with the oil inlet of the main reversing valve. The oil return port of the main reversing valve is connected with the oil return port T.

2. The integrated multi-way reversing valve for getting off a vehicle according to claim 1, characterized in that: One working oil port of the main reversing valve is connected to the main working oil port A of the valve body through a hydraulically controlled one-way valve, and a control oil port of the hydraulically controlled one-way valve is connected to another working oil port of the main reversing valve.

3. An integrated multi-way reversing valve for getting off a vehicle according to claim 1 or 2, characterized in that: The oil inlet P is connected to the oil return port T through an adjustable relief valve.

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