WO2023098717A1

WO2023098717A1 - Multi-way control valve and construction machine

Info

Publication number: WO2023098717A1
Application number: PCT/CN2022/135386
Authority: WO
Inventors: 于晓晨; 陆爱华; 杨密密
Original assignee: 索特传动设备有限公司
Priority date: 2021-11-30
Filing date: 2022-11-30
Publication date: 2023-06-08
Also published as: CN114017413A

Abstract

A multi-way control valve and a construction machine. The multi-way control valve comprises: a value body (10), the valve body (10) being provided with a first inlet (11) and a second inlet (12); a first travel switching valve core (20), provided in the valve body (10, the first inlet (11) being communicated with the first travel switching valve core (20) by means of a first flow channel (30); a second travel switching valve core (40), provided in the valve body (10), the second inlet (12) being communicated with the second travel switching valve core (40) by means of a second flow channel (50); a linear travel switching valve core (60), provided in the valve body (10) and located on the second flow channel (50); a plurality of functional valve cores (80) arranged in parallel and provided in the valve body (10); and a first one-way circulation structure (110), provided on a fourth flow channel (90).

Description

Multi-way control valve and construction machinery

technical field

The present application relates to the technical field of hydraulic control, in particular to a multi-way control valve and engineering machinery.

Background of the invention

The hydraulic principle of the control valve used in the dual-pump system hydraulic excavator in the related art is shown in Figure 1. The control valve includes two multi-way control valves, and the two multi-way control valves are connected to two variable pumps (PL and PR) respectively. One multi-way control valve is provided with a left travel switching valve 1, and the other multi-way control valve is provided with a right travel switching valve 2. Figure 1 also shows the arm 1 (Arm 1), arm 2 (Arm 2), backup device (Option), bucket (Bucket), swing device, stick 1 (Boom 1) and stick controlled by the control valve 2 (Boom 2). Among them, the multi-way control valve on the right side in Fig. 1 is provided with a linear travel switch valve 3, when the linear travel switch valve 3 is controlled to be in the right position, the hydraulic oil of the variable pump PL flows into the left travel switch valve 1 and the right travel switch valve 1 at the same time. The travel switch valve 2 realizes the straight travel of the excavator, and the hydraulic oil of the variable pump PR supplies oil to other actuators of the excavator (such as boom, arm, bucket, etc.).

However, in the above-mentioned control valve, even if the excavator is not in a straight-line walking state, the hydraulic oil discharged from the variable pump PL will reciprocate in the two multi-way control valves before entering the multi-way valve on the left in Figure 1. In the control valve, and supply oil to each spool. The above situation makes the oil supply of the variable pump produce a large pressure loss in the long channel, which becomes one of the main obstacles for the excavator to reduce fuel consumption.

Contents of the invention

Therefore, the technical problem to be solved in this application is to overcome the defect of high oil consumption of the excavator due to the large flow pressure loss of the control valve of the dual-pump system hydraulic excavator in the related art, so as to provide a multi-way control valve and construction machinery.

In order to solve the above problems, the application provides a multi-way control valve, including: a valve body, the valve body is provided with a first inlet and a second inlet, the first inlet and the second inlet are respectively suitable for the first variable pump and the The second variable pump is connected; the first travel switching spool is set in the valve body, and the first inlet communicates with the first travel switching spool through the first flow channel; the second travel switching spool is set in the valve body, and the second inlet passes through The second flow channel communicates with the second travel switching spool; the linear travel switching spool is set in the valve body and is located on the second flow channel, and the linear travel switching spool communicates with the first flow channel through the third flow channel, and the linear travel switching The spool is suitable for selectively connecting the first inlet or the second inlet with the second travel switching spool; multiple functional spools arranged in parallel are arranged in the valve body, wherein the first inlet communicates with multiple The second inlet communicates with a plurality of functional spools through the fifth channel; the first one-way flow structure is arranged on the fourth flow channel, and the first one-way flow structure is suitable for making the hydraulic oil flow from the first flow channel. Inlet to multi-function spool for one-way flow, or suitable for blocking the fourth flow channel.

Optionally, the first one-way flow structure includes: a one-way spool; a logic spool, the outlet of the logic spool communicates with the rear cavity of the one-way spool through the sixth flow channel, and the two inlets of the logic spool respectively pass through The seventh flow passage and the eighth flow passage communicate with the upstream oil passage and the downstream oil passage of the one-way spool, and the logic spool is suitable for making the downstream oil passage of the one-way spool communicate with the rear chamber, or the logic spool is suitable for Selectively make the upstream oil passage or the downstream oil passage of the one-way spool communicate with the rear chamber with higher pressure.

Optionally, the logic spool includes a first reversing valve and a second reversing valve arranged in series, wherein the first outlet of the first reversing valve communicates with the rear chamber through the sixth flow passage, and the eighth flow passage includes the first reversing valve. One flow channel and the second branch flow channel, the first branch flow channel communicates with the first control port of the first reversing valve, the second branch flow channel communicates with the third inlet of the first reversing valve, the seventh flow channel communicates with the second reversing valve It communicates with the fourth inlet of the valve, and the second outlet of the second reversing valve communicates with the fifth inlet of the first reversing valve and the second control end of the first reversing valve through the ninth flow passage.

Optionally, when the second outlet of the second reversing valve is disconnected from the fourth inlet, the second outlet communicates with the external oil tank.

Optionally, the plurality of functional spools includes a plurality of the following spools: boom control spool, stick control spool, bucket control spool, backup spool, wherein the boom control spool, stick control spool The control spool, the bucket control spool and the backup spool are set in parallel.

Optionally, the multi-way control valve further includes a second one-way flow structure, the second one-way flow structure is arranged on the fifth flow channel, and the second one-way flow structure is suitable for allowing the hydraulic oil to flow from the second inlet to the multiple functional valve cores. One-way circulation.

Optionally, the multi-way control valve further includes a rotary control spool, and the rotary control spool communicates with the second inlet through the tenth flow channel.

Optionally, the multi-way control valve further includes a first bypass spool and a second bypass spool, and the first bypass spool and the second bypass spool communicate with the first inlet and the second inlet respectively.

Optionally, the multi-way control valve further includes an overflow spool, and the overflow spool communicates with both the first inlet and the second inlet.

The present application also provides a construction machine, including the above-mentioned multi-way control valve.

This application has the following advantages:

Utilizing the technical solution of the present application, when the excavator does not travel in a straight line, the oil input from the first inlet supplies oil to the first travel switching spool, and the oil input from the second inlet supplies oil to the second travel switching spool. At the same time, The first one-way flow structure enables the hydraulic oil to communicate in one direction from the first inlet to the multiple functional spools, so that the oil entering the first inlet and the second inlet supplies oil to the multiple functional spools at the same time. When the excavator travels in a straight line, the straight-line travel switching spool is controlled to reversing, so that the first inlet is connected to the second switching travel spool, so that the oil in the first inlet simultaneously feeds the first travel switching spool and the second travel switching spool. The two travel switches the spool to supply oil. At the same time, the first one-way flow structure blocks the fourth flow channel, and at this time, only the oil from the second inlet supplies oil to the multiple functional valve cores. In the above structure, the multi-way control valve only has one valve body, and the length of each flow channel is greatly shortened, which reduces the oil supply flow pressure loss of the variable pump and improves the comprehensive energy efficiency of the excavator. Therefore, the technical solution of the present application solves the problem of high fuel consumption of the excavator due to the large flow pressure loss of the control valve of the dual-pump system hydraulic excavator in the related art.

Brief description of the drawings

In order to more clearly illustrate the technical solutions in the specific embodiments of the present application or related technologies, the following will briefly introduce the accompanying drawings that need to be used in the descriptions of specific embodiments or related technologies. Obviously, the accompanying drawings in the following description are For some embodiments of the present application, those skilled in the art can also obtain other drawings based on these drawings without any creative effort.

Fig. 1 shows a schematic diagram of the principle of a control valve of a hydraulic excavator with a dual-pump system in the related art.

Fig. 2 shows a schematic diagram of the hydraulic principle of the multi-way control valve of the present application.

Fig. 3 shows a schematic diagram of the hydraulic principle of the first one-way flow structure of the multi-way control valve in Fig. 2 .

Fig. 4 shows a schematic structural view of the first one-way flow structure and the second one-way flow structure of the multi-way control valve in Fig. 2 .

Explanation of reference signs:

1. Left travel switching valve; 2. Right travel switching valve; 3. Straight travel switching valve; 10. Valve body; 11. First inlet; 12. Second inlet; 20. First travel switching spool; 30. Second First flow channel; 40, the second travel switching spool; 50, the second flow channel; 60, straight line travel switching spool; 70, the third flow channel; 80, function spool; 81, stick control spool; 82, Boom control spool; 83, bucket control spool; 84, spare spool; 90, fourth flow channel; 100, fifth flow channel; 110, first one-way flow structure; 111, one-way spool; 1111. Rear cavity; 112. Logic spool; 1121. First reversing valve; 11211. First outlet; 11212. First control terminal; 11213. Third inlet; 11214. Fifth inlet; 11215. Second control terminal 1122, the second reversing valve; 11221, the fourth inlet; 11222, the second outlet; 120, the sixth flow channel; , the second branch flow channel; 150, the ninth flow channel; 160, the second one-way flow structure; 170, the rotary control spool; 180, the tenth flow channel; 190, the first bypass spool; 200, the second bypass Pass spool; 210, overflow spool.

Ways to implement this application

The technical solutions of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

In the description of this application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the application and simplification of the description, rather than indicating or implying that the referred device or element must have a specific orientation, use a specific orientation construction and operation, therefore should not be construed as limiting the application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance.

In the description of this application, it should be noted that unless otherwise specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.

In addition, the technical features involved in the different embodiments of the present application described below may be combined as long as they do not constitute a conflict with each other.

As shown in Figure 2, the multi-way control valve of this embodiment includes a valve body 10, a first travel switching spool 20, a second travel switching spool 40, a linear travel switching spool 60, and multiple functional spools arranged in parallel 80 and the first one-way flow structure 110. Wherein, the valve body 10 is provided with a first inlet 11 and a second inlet 12, and the first inlet 11 and the second inlet 12 are respectively adapted to be connected with the first variable pump and the second variable pump. The first travel switching spool 20 is arranged in the valve body 10 , and the first inlet 11 communicates with the first travel switching spool 20 through the first flow channel 30 . The second travel switching spool 40 is arranged in the valve body 10 , and the second inlet 12 communicates with the second travel switching spool 40 through the second flow channel 50 . The linear travel switching spool 60 is arranged in the valve body 10 and is located on the second flow channel 50, and the linear travel switching spool 60 communicates with the first flow channel 30 through the third flow channel 70, and the linear travel switching spool 60 is suitable for selecting The first inlet 11 or the second inlet 12 is selectively communicated with the second travel switching spool 40 . A plurality of functional spools 80 arranged in parallel are arranged in the valve body 10, wherein the first inlet 11 communicates with the plurality of functional spools 80 through the fourth flow passage 90, and the second inlet 12 communicates with the plurality of functional spools 80 through the fifth flow passage 100. The functional spool 80 communicates. The first one-way flow structure 110 is arranged on the fourth flow channel 90, and the first one-way flow structure 110 is suitable for one-way flow of hydraulic oil from the first inlet 11 to the plurality of functional valve cores 80, or is suitable for blocking the fourth flow. Road 90.

Utilizing the technical solution of this embodiment, when the excavator does not travel in a straight line, the oil input from the first inlet 11 supplies oil to the first travel switching spool 20, and the oil input from the second inlet 12 supplies oil to the second travel switching spool 40. Oil supply, at the same time, the first one-way flow structure 110 makes the hydraulic oil communicate from the first inlet 11 to the multiple functional spools 80 in one direction, so that the oil inlet of the first inlet 11 and the second inlet 12 simultaneously feeds the multiple functional spools 80 fuel supply. When the excavator walks in a straight line, the straight line travel switching spool 60 is controlled to change direction, so that the first inlet 11 communicates with the second travel switching spool 40, so that the oil in the first inlet 11 is simultaneously switched to the first travel. The spool 20 and the second traveling switching spool 40 supply oil. At the same time, the first one-way flow structure 110 blocks the fourth flow channel 90 , and at this time, only the oil entering the second inlet 12 supplies oil to the multiple functional valve cores 80 . In the above structure, only one valve body 10 is provided for the multi-way control valve, the length of each flow channel is greatly shortened, the pressure loss of the oil supply circulation of the variable variable pump is reduced, and the comprehensive energy efficiency of the excavator is improved. Therefore, the technical solution of this embodiment solves the problem of high fuel consumption of the excavator due to the large flow pressure loss of the control valve of the dual-pump system hydraulic excavator in the related art.

Referring to FIG. 2 , it should be noted that, in this embodiment, the first travel switching spool 20 is a right travel switching spool, and the second travel switching spool 40 is a left travel switching spool. Of course, the specific functions of the two can be set in reverse, that is, the first travel switching spool 20 is a left travel switching spool, and the second travel switching spool 40 is a right travel switching spool.

Referring to FIG. 2 , it should be noted that, in this embodiment, the linear travel switching spool 60 is a two-position three-way reversing valve. The two-position three-way reversing valve can make the first inlet 11 communicate with the second travel switching spool 40 through the first flow channel 30 and the third flow channel 70 by switching the right or left position, or make the second inlet 12 pass through the second The second flow channel 50 communicates with the second travel switching valve core 40 .

Further, in this embodiment, when the construction machine needs to travel straight, the straight travel switch spool 60 is in the right position, and when the construction machine does not travel straight, the straight travel switch spool 60 is in the left position.

As shown in FIG. 2 and FIG. 3 , in the technical solution of this embodiment, the first one-way flow structure 110 includes a one-way valve core 111 and a logic valve core 112 . Wherein, the outlet of the logic spool 112 communicates with the rear cavity 1111 of the check valve 111 through the sixth channel 120 . The two inlets of the logic spool 112 communicate with the upstream and downstream oil passages of the one-way spool 111 through the seventh flow passage 130 and the eighth flow passage 140 respectively, and the logic spool 112 is suitable for making the one-way spool 111 The downstream oil passage communicates with the rear chamber 1111 , or, the logic spool 112 is adapted to selectively connect the upstream oil passage or the downstream oil passage of the one-way valve 111 with higher pressure to the rear chamber 1111 .

Specifically, as can be seen from FIG. 2 and FIG. 3 , the upstream oil path of the one-way valve core 111 is at a in the figure, and the downstream oil path of the one-way valve core 111 is at b in the figure.

When the logic spool 112 makes the downstream oil passage b flow into the rear chamber 1111, the one-way valve 111 acts as a normal one-way valve, that is, when the pressure of the upstream oil passage a is greater than the downstream oil passage b, The one-way spool 111 is opened, and the hydraulic oil in the first inlet 11 can pass into multiple functional spools 80 downstream. When the pressure of the upstream oil passage a is lower than the downstream oil passage b, the one-way valve core 111 is closed, and the hydraulic oil in the first inlet 11 cannot pass through.

When the logic spool 112 makes the path with higher pressure in the upstream oil path a and the downstream oil path b flow into the rear cavity 1111, regardless of the pressure between the upstream oil path a and the downstream oil path b, the one-way spool 111 It is always in a closed state, that is, the one-way valve core 111 blocks the fourth flow channel 90 .

As shown in FIGS. 2 to 4 , the logic spool 112 includes a first reversing valve 1121 and a second reversing valve 1122 arranged in series. Wherein, the first reversing valve 1121 is a two-position three-way reversing valve, and the second reversing valve 1122 is a two-position two-way reversing valve. Further, the first outlet 11211 of the first reversing valve 1121 communicates with the rear chamber 1111 through the sixth channel 120 . The eighth channel 140 includes a first branch channel 141 and a second branch channel 142 , the first branch channel 141 communicates with the first control end 11212 of the first reversing valve 1121 , the second branch channel 142 communicates with the first reversing valve 1121 The third entrance 11213 is connected. The seventh channel 130 communicates with the fourth inlet 11221 of the second reversing valve 1122 . The second outlet 11222 of the second reversing valve 1122 communicates with the fifth inlet 11214 of the first reversing valve 1121 and the second control port 11215 of the first reversing valve 1121 through the ninth channel 150 .

The specific structures of the first reversing valve 1121 and the second reversing valve 1122 are first introduced below:

As shown in FIG. 3 , the first reversing valve 1121 is a two-position three-way reversing valve, which includes two inlets and one outlet, that is, a third inlet 11213 , a fifth inlet 11214 and a first outlet 11211 . In FIG. 3 , the upper liquid control end of the first reversing valve 1121 is the first control end 11212 , and the lower liquid control end of the first reversing valve 1121 is the second control end 11215 . A return spring is provided at the first control end 11212 . When the first reversing valve 1121 is in the upper position, the third inlet 11213 communicates with the first outlet 11211 , and when the first reversing valve 1121 is in the lower position, the fifth inlet 11214 communicates with the first outlet 11211 .

As shown in FIG. 3 , the second reversing valve 1122 is a two-position, two-way reversing valve, which includes an inlet and an outlet, that is, a fourth inlet 11221 and a second outlet 11222 . The upper end of the second reversing valve 1122 is controlled by an external signal, and the lower end of the second reversing valve 1122 is provided with a return spring. When the second reversing valve 1122 is in the upper position, the fourth inlet 11221 is connected to the second outlet 11222, but when the second reversing valve 1122 is in the lower position, the fourth inlet 11221 is disconnected from the second outlet 11222.

Based on the structure and connection method of the first reversing valve 1121 and the second reversing valve 1122 above, the control method of the logic spool 112 in this implementation is:

1. When there is no external control signal, the second reversing valve 1122 is in the down position, the second control end 11215 of the first reversing valve 1121 has no control pressure, and the first control end 11212 of the first reversing valve 1121 is connected to the downstream oil The pressure of the channel b, the first reversing valve 1121 is kept at the upper position, and the hydraulic oil in the downstream oil channel b is passed into the rear cavity 1111 at this time.

2. When the external control signal is triggered, the second reversing valve 1122 is in the upper position, and the fifth inlet 11214 and the second control port 11215 of the first reversing valve 1121 are fed into the hydraulic oil in the upstream oil circuit a, that is, at this time , the first control port 11212 and the second control port 11215 of the first reversing valve 1121 respectively lead to the pressure of the downstream oil circuit b and the upstream oil circuit a, therefore:

When the pressure of the upstream oil path a is greater than the pressure of the downstream oil path b, the first reversing valve 1121 is in the lower position, at this time the fifth inlet 11214 communicates with the first outlet 11211, that is, the hydraulic oil in the upstream oil path a is passed into to the rear chamber 1111.

When the pressure of the upstream oil passage a is lower than the pressure of the downstream oil passage b, the first reversing valve 1121 is in the upper position, and at this time, the third inlet 11213 communicates with the first outlet 11211 . That is, the hydraulic oil in the downstream oil passage b is passed into the rear cavity 1111 .

It can be seen that, by judging whether the external signal is triggered or not, the first reversing valve 1121 and the second reversing valve 1122 realize the above logic control.

As shown in FIG. 3 , in the technical solution of this embodiment, when the second outlet 11222 of the second reversing valve 1122 is disconnected from the fourth inlet 11221 , the second outlet 11222 communicates with the external oil tank. Specifically, when the second reversing valve 1122 is in the down position, the second outlet 11222 communicates with the external oil tank, thereby ensuring pressure relief at the second control end 11215 of the first reversing valve 1121, so that the first reversing valve 1121 Stay on top.

As shown in FIG. 2 , in the technical solution of this embodiment, the multiple functional spools 80 include at least part of the following spools: boom control spool 81 , arm control spool 82 , bucket control spool 83 , Spare spool 84. The boom control spool is the spool that controls the boom 1 (Arm 1) in Figure 2, the stick control spool is the spool that controls the stick 1 (Boom 1) in Figure 2, and the bucket control spool is the one shown in Figure 2. 2 controls the spool of the bucket (Bkt), and the spare spool is the spool of the standby device (Option) controlled in Figure 2. Figure 2 also shows the tank (Tank), that is, the multi-way control valve can be used for the Tank.

Of course, according to different types of construction machines, the functional spool 80 may also include other types of control spools.

As shown in Figure 2, in the technical solution of this embodiment, the multi-way control valve further includes a second one-way flow structure 160, the second one-way flow structure 160 is arranged on the fifth channel 100, and the second one-way flow structure 160 The structure 160 is suitable for one-way flow of hydraulic oil from the second inlet 12 to the plurality of functional spools 80 . The second one-way flow structure 160 is a one-way valve, and the second one-way flow structure 160 is arranged in parallel with the first one-way flow structure 110 .

As shown in FIG. 2 , in the technical solution of this embodiment, the multi-way control valve further includes a rotary control spool 170 , and the rotary control spool 170 communicates with the second inlet 12 through the tenth flow channel 180 . The rotary control spool 170 is arranged in parallel with the above-mentioned plurality of functional spools 80 .

As shown in Figure 2, in the technical solution of this embodiment, the multi-way control valve also includes a first bypass spool 190 and a second bypass spool 200, and the first bypass spool 190 and the second bypass valve The core 200 communicates with the first inlet 11 and the second inlet 12, respectively. The first bypass spool is L Bypass in Figure 2, and the second bypass spool is R Bypass in Figure 2. Specifically, both the first bypass spool 190 and the second bypass spool 200 are two-position two-way reversing valves. When the excavator is not performing any action, the first bypass spool 190 and the second bypass spool 200 are respectively suitable for releasing pressure on the first inlet 11 and the second inlet 12, so that the hydraulic oil of the two variable displacement pumps can pass through The first bypass spool 190 and the second bypass spool 200 flow back to the oil tank.

As shown in FIG. 2 , in the technical solution of this embodiment, the multi-way control valve further includes a relief spool 210 , and the relief spool 210 communicates with both the first inlet 11 and the second inlet. Specifically, the overflow spool 210 is suitable for adjusting the maximum working pressure of multiple variable displacement pumps.

This embodiment also provides a construction machine, including the above-mentioned multi-way control valve. Preferably, the engineering machinery is an excavator, and of course, other engineering machinery, such as cranes, pump trucks, etc., can use the above-mentioned multi-way control valve.

Apparently, the above-mentioned embodiments are only examples for clear description, rather than limiting the implementation. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. However, the obvious changes or changes derived therefrom are still within the protection scope of the invention of the present application.

Claims

A multi-way control valve comprising:

A valve body (10), the valve body (10) is provided with a first inlet (11) and a second inlet (12), and the first inlet (11) and the second inlet (12) are respectively suitable for Connected with the first variable pump and the second variable pump;

The first travel switching spool (20) is arranged in the valve body (10), and the first inlet (11) communicates with the first travel switching spool (20) through the first flow channel (30);

The second travel switching spool (40) is arranged in the valve body (10), and the second inlet (12) communicates with the second travel switching spool (40) through the second flow channel (50) ;

The linear travel switching spool (60) is arranged in the valve body (10) and on the second flow channel (50), and the linear travel switching spool (60) passes through the third flow channel (70 ) is in communication with the first passage (30), and the linear travel switching spool (60) is suitable for selectively switching the first inlet (11) or the second inlet (12) with the second travel The spool (40) is connected;

A plurality of functional spools (80) arranged in parallel are arranged in the valve body (10), wherein the first inlet (11) communicates with the plurality of functional spools ( 80) communication, the second inlet (12) communicates with a plurality of the functional spools (80) through the fifth flow channel (100);

The first one-way flow structure (110) is arranged on the fourth flow channel (90), and the first one-way flow structure (110) is suitable for allowing hydraulic oil to flow from the first inlet (11) to a plurality of The functional spool (80) communicates in one direction, or is suitable for blocking the fourth flow channel (90).
The multi-way control valve according to claim 1, wherein the first one-way flow structure (110) comprises:

One-way spool (111);

A logic spool (112), the outlet of the logic spool (112) communicates with the rear cavity (1111) of the one-way spool (111) through the sixth channel (120), the logic spool (112 ) through the seventh flow passage (130) and the eighth flow passage (140) respectively communicate with the upstream oil passage and the downstream oil passage of the check valve core (111), and the logic valve core (112) It is suitable for connecting the downstream oil circuit of the one-way spool (111) with the rear chamber (1111), or, the logic spool (112) is suitable for selectively making the oil circuit of the one-way spool (111) The path with higher pressure in the upstream oil path or the downstream oil path communicates with the rear cavity (1111).
The multi-way control valve according to claim 2, wherein the logic spool (112) includes a first reversing valve (1121) and a second reversing valve (1122) arranged in series, wherein,

The first outlet (11211) of the first reversing valve (1121) communicates with the rear chamber (1111) through the sixth flow channel (120), and the eighth flow channel (140) includes the first branch flow channel (141) and a second branch channel (142), the first branch channel (141) communicates with the first control end (11212) of the first reversing valve (1121), and the second branch channel ( 142) communicate with the third inlet (11213) of the first reversing valve (1121),

The seventh channel (130) communicates with the fourth inlet (11221) of the second reversing valve (1122),

The second outlet (11222) of the second reversing valve (1122) passes through the ninth channel (150) and the fifth inlet (11214) of the first reversing valve (1121) and the first reversing valve The second control port (11215) of the valve (1121) communicates.
The multi-way control valve according to claim 3, wherein when the second outlet (11222) and the fourth inlet (11221) of the second reversing valve (1122) are disconnected, the second The outlet (11222) communicates with the external tank.
The multi-way control valve according to claim 3 or 4, wherein the upper liquid control end of the first reversing valve (1121) is the first control end (11212), and the first reversing valve The lower liquid control end of (1121) is the second control end (11215), and a return spring is arranged at the first control end (11212).
The multi-way control valve according to claim 3 or 4, wherein the upper end of the second reversing valve (1122) is controlled by an external signal, and the lower end of the second reversing valve (1122) is provided with a return spring.
The multi-way control valve according to any one of claims 1 to 6, wherein the plurality of functional spools (80) include a plurality of the following spools:

Boom control spool (82), arm control spool (81), bucket control spool (83), spare spool (84),

Wherein, the boom control spool (82), the arm control spool (81), the bucket control spool (83) and the backup spool (84) are arranged in parallel.
The multi-way control valve according to any one of claims 1 to 7, wherein the multi-way control valve further comprises a second one-way flow structure (160), and the second one-way flow structure (160) is set On the fifth channel (100), the second one-way flow structure (160) is adapted to make the hydraulic oil one-way flow from the second inlet (12) to the plurality of functional valve cores (80) .
The multi-way control valve according to claim 8, wherein, the second one-way flow structure (160) is a one-way valve, and the second one-way flow structure (160) and the first one-way flow structure (110) Parallel setting.
The multi-way control valve according to any one of claims 1 to 9, wherein the multi-way control valve further comprises a rotary control spool (170), and the rotary control spool (170) passes through the tenth channel (180) communicates with said second inlet (12).
The multi-way control valve according to claim 10, wherein the rotary control spool (170) is arranged in parallel with a plurality of the functional spools (80).
The multi-way control valve according to any one of claims 1 to 11, wherein the multi-way control valve further comprises a first bypass spool (190) and a second bypass spool (200), the The first bypass spool (190) and the second bypass spool (200) communicate with the first inlet (11) and the second inlet (12) respectively.
The multi-way control valve according to any one of claims 1 to 12, wherein the multi-way control valve further comprises a relief spool (210), and the relief spool (210) is connected to the first Both the inlet (11) and the second inlet are connected.
The multi-way control valve according to any one of claims 1 to 13, wherein the first travel switching spool (20) is a right travel switching spool, and the second travel switching spool (40) is Left travel switching spool; or

The first travel switching spool (20) is a left travel switching spool, and the second travel switching spool (40) is a right travel switching spool.
The multi-way control valve according to any one of claims 1 to 14, wherein the linear travel switching spool (60) is a two-position three-way reversing valve, and the two-position three-way reversing valve switches the right position or left position, so that the first inlet (11) communicates with the second travel switching spool (40) through the first flow channel (30) and the third flow channel (70), or make the The second inlet (12) communicates with the second travel switching valve core (40) through the second flow channel (50).
A construction machine, comprising the multi-way control valve according to any one of claims 1 to 15.
The construction machine according to claim 16, wherein the construction machine comprises one of the following construction machines: an excavator, a crane, and a pump truck.