Integral multi-way reversing valve

Abstract

The utility model discloses an integral multi-way reversing valve which comprises an integral valve body, an oil inlet and an oil return port which are arranged in the valve body, a first working oil port oil return channel, an oil inlet channel, a second working oil port oil return channel and a middle-position unloading oil channel which are arranged in the valve body, and a one-way valve is arranged between the oil inlet and the oil inlet channel. More than two slide valves are arranged in the valve body, one end of each slide valve is connected with a handle, and the other end of each slide valve is provided with a spring positioning mechanism; a low-pressure oil channel is further arranged in the valve body between the middle-position unloading oil channel and each spring positioning mechanism, each sliding valve penetrates through the low-pressure oil channel, and the first working oil port oil return channel, the second working oil port oil return channel and the low-pressure oil channel are all connected with an oil return port. Sealing rings are arranged on the slide valves on the outer sides of the first working oil port oil return channel and the low-pressure oil channel; low pressure can be achieved at the two ends of the slide valve, the compression amount of the sealing rings at the two ends can be properly reduced, the possibility of leakage is reduced, and reversing operation of the slide valve is facilitated.

Description

Technical Field

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

[0002] The existing integral multi-way reversing valve comprises an integral valve body, an oil inlet and an oil return port arranged in the valve body, a first working oil return channel, an oil inlet channel, a second working oil return channel, and a mid-position unloading oil channel arranged in sequence in the valve body along the transverse direction of the valve body, a one-way valve is arranged between the oil inlet and the oil inlet channel, two or more slide valves vertically pass through the oil inlet channel, the mid-position unloading oil channel and the two working oil return channels and are arranged in the valve body transversely, two working oil ports corresponding to each slide valve are arranged in the valve body on both sides of the oil inlet channel, one end of each slide valve is connected to a handle, and the other end is provided with a spring positioning mechanism; To prevent leakage, sealing rings are required to be provided on the oil return channel of the first working oil port and each sliding valve on the outside of the mid-position unloading oil channel on both sides; when the sliding valve is working, one end of the sliding valve adjacent to the mid-position unloading oil channel may be the high-pressure end. The high pressure can easily cause the sealing ring corresponding to this end to be compressed relatively more and damaged quickly, resulting in leakage after damage. In this way, the pressure level of the sealing ring at this end needs to be increased, but this will increase the friction between the sliding valve and the sealing ring, resulting in an increase in the resistance to the automatic return of the sliding valve. If the spring force in the spring positioning mechanism is increased, the operator will have to work harder when the sliding valve is switched, 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 in view of the above-mentioned deficiencies in the prior art, which can achieve low pressure at both ends of the slide valve and appropriately reduce the compression of the sealing rings at both ends, which not only reduces the possibility of external leakage but also facilitates the reversing operation of the slide valve.

[0004] In order to achieve the above-mentioned purpose, the utility model comprises an integral multi-way reversing valve, comprising an integral valve body, an oil inlet and an oil return port arranged in the valve body, a first working oil return channel, an oil inlet channel, a second working oil return channel, and a middle unloading oil channel arranged in the valve body in sequence along the transverse direction of the valve body, a one-way valve is arranged between the oil inlet and the oil inlet channel, two or more slide valves are arranged in the valve body transversely through the oil inlet channel, the middle unloading oil channel and the two working oil return channels, two working oil ports corresponding to each slide valve are arranged in the valve body on both sides of the oil inlet channel, one end of each slide valve is connected to a handle, and the other end is provided with a spring positioning mechanism; it is characterized in that a low-pressure oil channel is also arranged in the valve body between the middle unloading oil channel and each spring positioning mechanism, each slide valve passes through the low-pressure oil channel, the first working oil return channel, the second working oil return channel and the low-pressure oil channel are connected to the oil return port, and a sealing ring is arranged on each slide valve outside the first working oil return channel and the low-pressure oil channel.

[0005] The utility model adds a low-pressure oil channel in the valve body outside the middle unloading oil channel, and the low-pressure oil channel is connected to the oil return port. Both ends of the slide valve can return oil and are low-pressure ends. The low pressure at both ends not only reduces the possibility of external leakage, but also appropriately reduces the compression of the sealing rings at both ends, reduces the friction between the slide valve and the sealing ring, makes automatic return easier, and facilitates the reversing operation of the slide valve.

[0006] As a further improvement of the utility model, the first working oil port oil return channel and the low-pressure oil channel are connected to the oil inlet through respective overload valves; if the oil inlet pressure is too large, the two overload valves can be opened to release the pressure;

[0007] As a further improvement of the utility model, the end of the neutral unloading oil passage is connected to the bridge port, and the bridge port is connected to the valve body through a thread; other hydraulic valve groups or hydraulic components can be connected through the bridge port to increase the hydraulic function of each slide valve when it is in the neutral position;

[0008] In summary, the utility model can realize low pressure at both ends of the slide valve, and can appropriately reduce the compression amount of the sealing rings at both ends, which not only reduces the possibility of external leakage, but also facilitates the switching operation of the slide valve. 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 Top view of the .

[0011] Figure 3 for Figure 1 EE cross-sectional view.

[0012] Figure 4 The hydraulic principle diagram of the embodiment of the utility model. DETAILED DESCRIPTION

[0013] The utility model will be further described in detail below in conjunction with the accompanying drawings.

[0014] like Figures 1 to 4As shown, the integral multi-way reversing valve of this embodiment comprises an integral valve body 1, an oil inlet 2 (P) arranged in the valve body, an oil return port 3 (T), a first working oil return channel 4, an oil inlet channel 5, a second working oil return channel 6, a mid-position unloading oil channel 7 and a low-pressure oil channel 8 arranged in sequence in the valve body along the transverse direction of the valve body, a one-way valve 9 is arranged between the oil inlet 2 and the oil inlet channel 5, the first working oil return channel 4 and the low-pressure oil channel 8 are connected to the oil inlet 2 through respective overload valves 10 or 11, and six slide valves 13 are all arranged in the valve body 1 transversely through the oil inlet channel 5, the mid-position unloading oil channel 7 and the two working oil return channels 4, 6 and the low-pressure oil channel 8. Six groups of two working oil ports (A1-A6, B1-B6) corresponding to each slide valve 13 are arranged in the valve body 1 between the oil inlet channel 5 and the first working oil return channel 4 and the second working oil return channel 6 on both sides. One end of each slide valve 13 is connected to a handle 14, and the other end is provided with a spring positioning mechanism 15; the first working oil return channel 4, the second working oil return channel 6 and the low-pressure oil channel 8 are all connected to the oil return port 3, and sealing rings 16 and 17 are provided on each slide valve 13 outside the first working oil return channel 4 and the low-pressure oil channel 8; the end of the mid-position unloading oil channel 7 is connected to the bridge port 18 (J), and the bridge port 18 is connected to the valve body 1 through threads.

[0015] The six groups of two working oil ports (A1-A6, B1-B6) of the utility model share one oil inlet channel 5, and the structure is compact; by adding a low-pressure oil channel 8 in the valve body 1 outside the mid-position unloading oil channel 7, the first working oil port return oil channel 4 and the low-pressure oil channel 8 are both connected to the oil return port 3, and both ends of each slide valve 13 can return oil and are low-pressure ends. The low pressure at both ends not only reduces the possibility of external leakage, but also can appropriately reduce the compression of the sealing rings 16 and 17 at both ends, reduce the friction between the slide valve 13 and the two sealing rings, and make automatic return easier, so The return spring force of the spring positioning mechanism 15 can be reduced, and the working intensity of the operator when the slide valve is switched can be reduced, which is convenient for the switching operation of the slide valve; other hydraulic valve groups or hydraulic components can be connected through the bridge port 18 to increase the hydraulic function of each slide valve 13 when it is in the middle position; if there is no need to increase its hydraulic function, the bridge port 18 can be disassembled, its screw hole can be blocked, and the middle position unloading oil channel 7 can be connected to the return oil port 3; if the oil inlet pressure is too large, the two overload valves 10 and 11 can be opened to release the pressure; the utility model can be used for O-type and Y-type slide valves at the same time.

Claims

1. An integral multi-way reversing valve, comprising an integral valve body, an oil inlet and an oil return port arranged in the valve body, a first working oil return channel, an oil inlet channel, a second working oil return channel, and a mid-position unloading oil channel arranged in the valve body in sequence along the transverse direction of the valve body, a one-way valve is arranged between the oil inlet and the oil inlet channel, two or more slide valves are arranged transversely in the valve body through the oil inlet channel, the mid-position unloading oil channel and the two working oil return channels, two working oil ports corresponding to each slide valve are arranged in the valve body on both sides of the oil inlet channel, one end of each slide valve is connected to a handle, and the other end is provided with a spring positioning mechanism; characterized in that: A low-pressure oil passage is also provided in the valve body between the mid-position unloading oil passage and each spring positioning mechanism. Each sliding valve passes through the low-pressure oil passage. The first working oil port return oil passage, the second working oil port return oil passage and the low-pressure oil passage are all connected to the oil return port. Sealing rings are provided on each sliding valve outside the first working oil port return oil passage and the low-pressure oil passage.

2. The integrated multi-way reversing valve according to claim 1 is characterized in that: The first working oil port oil return passage and the low-pressure oil passage are both connected to the oil inlet through respective overload valves.

3. The integrated multi-way reversing valve according to claim 1 or 2, characterized in that: The end of the mid-position unloading oil passage is connected to the bridge port, and the bridge port is connected to the valve body through threads.

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