CN213448643U - Multi-way valve for large excavator - Google Patents
Multi-way valve for large excavator Download PDFInfo
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- CN213448643U CN213448643U CN202021500027.4U CN202021500027U CN213448643U CN 213448643 U CN213448643 U CN 213448643U CN 202021500027 U CN202021500027 U CN 202021500027U CN 213448643 U CN213448643 U CN 213448643U
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Abstract
The utility model discloses a large-scale multiple unit valve for machine that digs relates to the multiple unit valve field. The hydraulic control valve comprises an upper valve body, a middle valve body and a lower valve body, 12 main valve cores, a main overflow valve, 8 port overflow valves, 2 locking valves, 0-3 logic valves and a plurality of one-way valves. The upper valve body is provided with a straight-moving valve core, a left-moving valve core, a right-moving valve core and a rotary valve core, the middle valve body is provided with a movable arm 1 valve core, a movable arm 2 valve core, a bucket valve core and a standby valve core, and the lower valve body is provided with a bucket rod 1 valve core, a bucket rod 2 valve core, a first bypass cut-off valve core and a second bypass cut-off valve core. The hydraulic multi-way valve has the advantages of high efficiency, energy conservation, good controllability and capability of being used for a positive flow control system or a negative flow control system.
Description
Technical Field
The utility model relates to a multiple unit valve field especially relates to a large-scale multiple unit valve for machine that digs.
Background
The hydraulic excavator is an earth construction machine integrating loading and excavating functions, and is a multi-way valve used as a core control unit of the hydraulic excavator, and the performance of the multi-way valve determines the operating performance and the energy consumption condition of the hydraulic excavator. The multi-way valve that present large-scale machine of digging used is mostly two-piece formula, and the valve body atress condition is not good when the fit, leads to the case the jamming to appear or lets out the big condition of leakage volume, simultaneously because the oil duct arranges unreasonablely, and pressure loss is big, and energy loss is big. When the excavator performs composite action, because the working load difference of each working device is large, the performance of the composite action is improved to a certain extent by the currently used fixed priority valve, but because the difference of actual working conditions is large and changes at any time, the fixed priority valve cannot change along with the load of the working conditions, and the operation performance of the excavator during the working under the ideal working conditions is not ideal. The novel multi-way valve with reasonable structure, high working pressure, good energy-saving effect and good operation performance is designed by analyzing and optimizing the defects.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to current large-scale multi-way valve for excavator not enough, provide a liquid energy-efficient, the nature controlled good, can be used to positive flow control system or burden flow control system's hydraulic pressure multi-way valve.
In order to achieve the above object, the technical scheme of the utility model is to provide a large-scale multi-way valve for excavator, include: the upper valve body, the middle valve body and the lower valve body are arranged in sequence; the upper valve body is provided with a straight-moving valve core, a left-moving valve core, a right-moving valve core and a rotary valve core; the middle valve body is provided with a movable arm first valve core, a movable arm second valve core, a bucket valve core and a spare valve core; the lower valve body is provided with a second bucket rod valve core, a first bypass cut-off valve core and a second bypass cut-off valve core; the right traveling valve core, the movable arm first valve core, the bucket rod second valve core and the first bypass cut-off valve core are positioned on the first main pump oil path; the left traveling valve core, the rotary valve core, the movable arm second valve core, the standby valve core, the bucket rod first valve core and the second bypass cut-off valve core are positioned on a second main pump oil path; the straight-moving valve core is arranged on the first main pump oil path and the second main pump oil path at the same time, and further comprises a main overflow valve and eight-port overflow valves.
Further, the position of the first valve core of the bucket rod is called a first bucket rod joint, the position of the second valve core of the bucket rod is called a second bucket rod joint, the position of the first valve core of the movable arm is called a first movable arm joint, the position of the rotary valve core is called a rotary joint, the position of the valve core of the bucket is called a bucket joint, the rotary joint, the first bucket rod joint and the second bucket rod joint can be provided with priority valves or not provided with priority valves, the first movable arm joint and the first bucket rod joint are respectively provided with a load holding valve, and the first bucket rod joint is provided with a regeneration cut-off valve.
Furthermore, the bucket rod is connected in series, a regeneration cut-off valve, a load holding valve, a bucket rod first logic valve and a port overflow valve are arranged on the bucket rod, and a check valve is arranged in a valve core and used for recycling return oil flow;
the movable arm I is provided with a load holding valve and a port overflow valve, and a check valve is arranged in the valve core and used for recycling return oil flow;
the rotary joint is provided with a rotary logic valve, and when the movable arm ascends and rotates to perform compound action, the rotary logic valve ensures that high-pressure oil is preferentially supplied to the movable arm oil cylinder;
and when the movable arm rises and the bucket rod performs compound action, the second logic valve of the bucket rod ensures that high-pressure oil is preferentially supplied to the movable arm oil cylinder.
The bucket is connected with 2 port overflow valves arranged on the bucket. The spare valve core is called a spare joint, and 2 port overflow valves are arranged on the spare valve core.
Furthermore, the diameters of the first bypass cut-off valve core and the second bypass cut-off valve core are 28mm, the diameters of the rest main valve cores are 34mm, the rated single pump flow rate is 450L/min, the rated pressure is 34.3MPa, the maximum pressure is 37.3MPa, and the port pressure is 39.2MPa, so that the valve is suitable for a positive flow control system or a negative flow control system of a 30-80 ton-level excavator.
Further, the first main pump oil path comprises a first movable arm link and an arm link, and the second main pump oil path comprises a second movable arm link and an arm link, so that a double-pump confluence function of the movable arm link and the arm link is realized; the bucket coupler is positioned on an oil path of the first main pump, the double-pump confluence function is realized by cutting off the valve core through the second bypass, the standby coupler is also arranged on the oil path of the second main pump, and the double-pump confluence function is realized by cutting off the valve core through the first bypass.
Further, the bucket link and the standby link are respectively provided with 2 port overflow valves, and the movable arm link, the movable arm duplex link, the bucket rod duplex link and the bucket rod duplex link are respectively provided with one port overflow valve.
The beneficial effects of the utility model include:
1. the application range is wide. The utility model discloses a multiple unit valve can be general in the positive flow control system of 30~80 tons of grades of machines of digging or burden flow control system, is favorable to mass production.
2. High efficiency and energy saving. The utility model discloses a multiple unit valve pressure level is high, and loss of pressure is little, has double pump confluence and flow regeneration function simultaneously, plays effects such as reducing oil consumption, improvement operating efficiency.
3. The controllability is good. The utility model discloses a logic valve of 0~3 variable orifices can be integrated as required to the multiple unit valve, when digging quick-witted compound action, through the regulation of logic valve, makes the system flow match more optimizes, moves more harmoniously.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is obvious that the drawings in the following description are some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is the whole hydraulic principle circuit diagram of the multi-way valve of the utility model.
1-upper valve body, 2-middle valve body, 3-lower valve body, 4-first main pump oil way, 5-second main pump oil way, 6-straight travel valve core, 7-right travel valve core, 8-left travel valve core, 9-rotary valve core, 10-movable arm first valve core, 11-movable arm second valve core, 12-bucket valve core, 13-standby valve core, 14-arm second valve core, 15-arm first valve core, 16-first bypass cut-off valve core, 17-second bypass cut-off valve core, 18-main overflow valve, 19-port overflow valve, 20-load holding valve, 21-rotary logic valve, 22-arm first logic valve, 23-arm second logic valve and 24-regeneration cut-off valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The first embodiment is as follows:
as shown in fig. 1, the multi-way valve for the large excavator comprises three valve bodies, namely an upper valve body, a middle valve body and a lower valve body, twelve main valve cores, a main overflow valve, 8 port overflow valves, 2 locking valves, 3 logic valves and a plurality of check valves. The upper valve body 1 is provided with a straight travel valve core 6, a right travel valve core 7, a left travel valve core 8 and a rotary valve core 9, the middle valve body 2 is provided with a movable arm first valve core 10, a movable arm second valve core 11, a bucket valve core 12 and a standby valve core 13, and the lower valve body 3 is provided with a bucket rod second valve core 14, a bucket rod first valve core 15, a first bypass cut-off valve core 16 and a second bypass cut-off valve core 17. The diameters of the first bypass cut-off valve core 16 and the second bypass cut-off valve core 17 are 28mm, the diameters of the other main valve cores are 34mm, the rated single pump flow rate is 450L/min, the rated pressure is 34.3MPa, the maximum pressure is 37.3MPa, and the port pressure is 39.2MPa, so that the valve is suitable for a positive flow rate control system or a negative flow rate control system of a 30-80 ton excavator.
The left traveling valve core 8, the movable arm first valve core 10, the bucket valve core 12, the arm second valve core 14 and the first bypass cut-off valve core 16 are positioned on the first main pump oil path 4; the right traveling valve core 7, the rotary valve core 9, the movable arm second valve core 11, the standby valve core 13, the arm first valve core 15 and the second bypass cut-off valve core 17 are positioned on the second main pump oil path 5; the straight spool 6 is on both the first main pump fluid passage 4 and the second main pump fluid passage 5.
The straight-moving valve core 6 ensures that the moving does not deviate when the excavator performs left-right moving and compound actions of other mechanisms.
The first valve core 15 of the bucket rod is called as a bucket rod assembly, a regeneration cut-off valve 24, a load holding valve 20, a first logic valve 22 of the bucket rod and a port overflow valve 19 are arranged on the first valve core, and a check valve is arranged inside the valve core and used for recycling return oil flow.
The movable arm first valve core 10 is called as a movable arm assembly, a load holding valve 20 and a port overflow valve 19 are arranged on the movable arm first valve core, and a check valve is arranged inside the valve core and used for recycling return oil flow.
The rotary valve core 9 is called a rotary joint, a rotary logic valve 21 is arranged on the rotary joint, and when the movable arm ascends and rotates in a compound action, the rotary logic valve 21 ensures that high-pressure oil is preferentially supplied to the movable arm oil cylinder.
The arm second valve core 14 is called an arm duplex, and an arm second logic valve 23 and a port overflow valve 19 are arranged on the arm second valve core, so that when a movable arm ascends and an arm performs combined action, the arm second logic valve 23 ensures that high-pressure oil is preferentially supplied to a movable arm oil cylinder.
The bucket valve core 12 is called a bucket chain, and 2 port overflow valves 19 are arranged on the bucket valve core. The spare valve core 13 is called a spare joint, and 2 port overflow valves 19 are arranged on the spare valve core.
The second bypass cut-off valve core 17 cuts off a passage of the P2 pump returning oil tank when the bucket cylinder operates alone, so that high-pressure oil of the P2 pump flows to the bucket link through the one-way valve, and a double-pump confluence function that the P1 pump and the P2 pump supply oil simultaneously when the bucket cylinder operates alone is realized.
The first bypass cut-off valve core 17 cuts off a passage of the P1 pump returning oil tank when the standby oil cylinder independently acts, so that high-pressure oil of the P1 pump flows to a standby link through a one-way valve, and a double-pump confluence function that the P1 pump and the P2 pump supply oil simultaneously when the standby oil cylinder independently acts is realized.
When the system pressure is higher than the set pressure of the main overflow valve 18, the main overflow valve 18 is opened, and the flow flows back to the oil tank through the main overflow valve 18, so as to protect the system.
When the impact generated by the operation of the oil cylinder exceeds the set pressure of the port overflow valve 19, the port overflow valve 19 is opened, and the flow can flow back to the oil tank through the port overflow valve 19, so that the aim of protecting the oil cylinder is fulfilled; meanwhile, when the pressure of the oil cylinder is lower than the suction prevention pressure set by the port overflow valve 19 under the action of the negative load, the port overflow valve 19 is opened, so that oil enters the oil cylinder, and the purpose of preventing the oil cylinder from being sucked is achieved.
The above-mentioned embodiments are only intended to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.
Claims (6)
1. A multi-way valve for a large excavator is characterized by comprising: the valve comprises an upper valve body (1), a middle valve body (2) and a lower valve body (3) which are arranged in sequence; the upper valve body (1) is provided with a straight travel valve core (6), a left travel valve core (7), a right travel valve core (8) and a rotary valve core (9); the middle valve body (2) is provided with a movable arm first valve core (10), a movable arm second valve core (11), a bucket valve core (12) and a spare valve core (13); the lower valve body (3) is provided with an arm second valve core (14), an arm first valve core (15), a first bypass cut-off valve core (16) and a second bypass cut-off valve core (17); the hydraulic control system is characterized by further comprising a first main pump oil way (4) and a second main pump oil way (5), wherein the right traveling valve core (8), the movable arm first valve core (10), the bucket valve core (12), the arm second valve core (14) and the first bypass cut-off valve core (16) are located on the first main pump oil way (4); the left traveling valve core (7), the rotary valve core (9), the movable arm second valve core (11), the standby valve core (13), the bucket rod first valve core (15) and the second bypass cut-off valve core (17) are positioned on the second main pump oil way (5); the straight-moving valve core (6) is arranged on the first main pump oil path (4) and the second main pump oil path (5) at the same time, and further comprises a main overflow valve (18) and eight port overflow valves (19).
2. The multi-way valve for large excavators according to claim 1, characterized in that:
the bucket hydraulic control system is characterized in that the position of the first valve core (15) of the arm is called an arm first joint, the position of the second valve core (14) of the arm is called an arm second joint, the position of the first valve core (10) of the movable arm is called a movable arm first joint, the position of the rotary valve core (9) is called a rotary joint, the position of the valve core (12) of the bucket is called a bucket joint, the rotary joint, the arm first joint and the arm second joint can be provided with a priority valve or not provided with the priority valve, the movable arm first joint and the arm first joint are respectively provided with a load holding valve, and the arm first joint is provided with a regeneration cut-off valve.
3. The multi-way valve for large excavators according to claim 2, characterized in that: the bucket rod I is provided with a regeneration cut-off valve (24), a load retaining valve (20), a bucket rod first logic valve (22) and a port overflow valve (19), and a check valve is arranged in a valve core and used for recycling return oil flow;
the movable arm assembly is provided with a load maintaining valve (20) and a port overflow valve (19), and a check valve is arranged in a valve core and used for recycling return oil flow;
the rotary joint is provided with a rotary logic valve (21), and when the movable arm ascends and rotates in a compound action, the rotary logic valve (21) ensures that high-pressure oil is preferentially supplied to the movable arm oil cylinder;
the bucket rod is connected in a duplex mode, a second bucket rod logic valve (23) and a port overflow valve (19) are arranged on the bucket rod, and when a movable arm rises and the bucket rod moves in a combined mode, the second bucket rod logic valve (23) ensures that high-pressure oil is preferentially supplied to a movable arm oil cylinder;
the bucket unit is provided with 2 port overflow valves (19);
the spare valve core (13) is called a spare joint, and 2 port overflow valves (19) are arranged on the spare valve core.
4. The multi-way valve for large excavators according to claim 2, characterized in that: the diameters of the first bypass cut-off valve core (16) and the second bypass cut-off valve core (17) are 28mm, the diameters of the other main valve cores are 34mm, the rated single pump flow rate is 450L/min, the rated pressure is 34.3MPa, the maximum pressure is 37.3MPa, and the port pressure is 39.2MPa, so that the valve is suitable for a positive flow control system or a negative flow control system of a 30-80 ton-level excavator.
5. The multi-way valve for large excavators according to claim 2, characterized in that: the first main pump oil path comprises a movable arm duplex part and an arm duplex part, and the second main pump oil path comprises a movable arm duplex part and an arm duplex part, so that the double-pump confluence function of the movable arm duplex part and the arm duplex part is realized; the bucket coupler is positioned on an oil path of the first main pump, the double-pump confluence function is realized by cutting off the valve core through the second bypass, the standby coupler is also arranged on the oil path of the second main pump, and the double-pump confluence function is realized by cutting off the valve core through the first bypass.
6. The multi-way valve for large excavators according to claim 5, characterized in that: the bucket link and the standby link are respectively provided with 2 port overflow valves, and the movable arm one link, the movable arm double link, the bucket rod one link and the bucket rod double link are respectively provided with one port overflow valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021500027.4U CN213448643U (en) | 2020-07-27 | 2020-07-27 | Multi-way valve for large excavator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021500027.4U CN213448643U (en) | 2020-07-27 | 2020-07-27 | Multi-way valve for large excavator |
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| CN213448643U true CN213448643U (en) | 2021-06-15 |
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| CN202021500027.4U Active CN213448643U (en) | 2020-07-27 | 2020-07-27 | Multi-way valve for large excavator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113339358A (en) * | 2021-06-29 | 2021-09-03 | 湖南星邦智能装备股份有限公司 | Valve core clamping stagnation detection method and device of hydraulic control valve and overhead working truck |
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2020
- 2020-07-27 CN CN202021500027.4U patent/CN213448643U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113339358A (en) * | 2021-06-29 | 2021-09-03 | 湖南星邦智能装备股份有限公司 | Valve core clamping stagnation detection method and device of hydraulic control valve and overhead working truck |
| CN113339358B (en) * | 2021-06-29 | 2024-03-12 | 湖南星邦智能装备股份有限公司 | Valve element clamping stagnation detection method and device of hydraulic control valve and overhead working truck |
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