CN114321057B - Pumping main valve - Google Patents
Pumping main valve Download PDFInfo
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- CN114321057B CN114321057B CN202111367510.9A CN202111367510A CN114321057B CN 114321057 B CN114321057 B CN 114321057B CN 202111367510 A CN202111367510 A CN 202111367510A CN 114321057 B CN114321057 B CN 114321057B
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Abstract
The invention discloses a pumping main valve, which comprises a valve body, wherein a main oil inlet, a main oil return port, a secondary oil inlet and a secondary oil return port are arranged on the valve body, and the secondary oil inlet and the secondary oil return port are communicated with control oil; the first oil outlet, the second oil outlet, the third oil outlet and the fourth oil outlet; the switching valve cavity is arranged in the valve body and is provided with a first oil inlet, a first oil return port, a first switching oil port and a second switching oil port, a valve rod capable of moving back and forth is in clearance fit with the switching valve cavity, and the valve rod can enable the first oil inlet to be communicated with the first switching oil port and the first oil return port to be communicated with the second switching oil port, or enable the first oil inlet to be communicated with the second switching oil port and the first switching oil port to be communicated with the first oil return port; and the electromagnetic valve is connected to the valve body and used for controlling the valve rod to reciprocate in the switching valve cavity. The pumping main valve has the advantages of small volume, simple and compact structure, low production cost, quick oil supply switching reaction and capability of providing enough space for the assembly of other accessories.
Description
Technical Field
The invention relates to the technical field of hydraulic control systems of engineering machinery, in particular to a pumping main valve.
Background
In the field of engineering machinery and construction machinery, there are many devices such as pump trucks, excavators, loaders, excavators, etc., which need to bear loads or perform actions by means of cylinders, and the actions of the cylinders are generally controlled by control valves; if the pumping truck needs to alternately act between the pumping cylinders and the swinging cylinders during working, the alternate act between the pumping cylinders and the swinging cylinders needs to be controlled by the pumping main valve, namely the pumping main valve controls the mortar pump to supply oil to the pumping cylinders or the swinging cylinders so as to realize the alternate act between the pumping cylinders and the swinging cylinders. The structure of the pumping main valve in the prior art comprises two types, one type is separated, the other type is integrated, the electromagnetic switching valve is arranged on the outer side wall of the pumping main valve, and the pumping main valve is communicated with the electromagnetic switching valve through a pipeline; the integrated pumping main valve is characterized in that an electromagnetic switching valve is integrated in the pumping main valve; taking an integrated pumping main valve as an example, a high-pressure switching valve cavity and a low-pressure switching valve cavity are generally arranged in a valve body of the integrated pumping main valve in the prior art, two oil outlets of the high-pressure switching valve cavity are respectively communicated with a rodless cavity of a pumping oil cylinder, two oil outlets of the low-pressure switching valve cavity are respectively communicated with a rod cavity of the pumping oil cylinder, and the pumping oil cylinder alternately works through the action of valve rods in the high-pressure switching valve cavity and the low-pressure switching valve cavity. The valve body of the integrated pumping main valve in the prior art is internally provided with two switching valve cavities, so that the internal structure of the valve body is complex, and the production cost is high; other parts in the valve body, such as an on-off valve, a pressure relief valve and the like, have narrow assembly space, and are inconvenient to install and distribute; and the valve body has larger volume and less compact structure.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides the pumping main valve which has the advantages of small volume, simple and compact structure, low production cost, quick oil supply switching reaction and capability of providing enough space for the assembly of other accessories.
The technical solution of the present invention is to provide a pumping main valve with the following structure: the valve comprises a valve body, wherein a main oil inlet, a main oil return port, a secondary oil inlet and a secondary oil return port which are communicated with control oil are arranged on the valve body; the valve body is provided with a first oil outlet and a second oil outlet which are communicated with the rodless cavity oil port of the first oil cylinder group, and a third oil outlet and a fourth oil outlet which are communicated with the rodless cavity oil port of the second oil cylinder group;
the switching valve cavity is arranged in the valve body and is provided with a first oil inlet communicated with the main oil inlet, a first oil return port communicated with the main oil return port, a first switching oil port communicated with the first oil outlet and the second oil outlet and a second switching oil port communicated with the third oil outlet and the fourth oil outlet, and a valve rod capable of moving back and forth is arranged in the switching valve cavity in a clearance fit manner, so that the first oil inlet is communicated with the first switching oil port and the first oil return port is communicated with the second switching oil port, or the first oil inlet is communicated with the second switching oil port and the first switching oil port is communicated with the first oil return port;
and the electromagnetic valve is connected to the valve body and used for controlling the valve rod to reciprocate in the switching valve cavity.
Preferably, valve bodies at two ends of the switching valve cavity are respectively connected with one end cover, and two control oil cavities are respectively arranged between two ends of the valve rod and the two end covers: a first control oil chamber and a second control oil chamber; the electromagnetic valves are two: a first solenoid valve and a second solenoid valve; the first electromagnetic valve controls the control oil of the secondary oil inlet to enter or flow out of the first control oil cavity, and the second electromagnetic valve controls the control oil of the secondary oil inlet to enter or flow out of the second control oil cavity.
Preferably, elastic pieces are arranged in the two control oil cavities, one end of each elastic piece is connected with the end part of the valve rod, and the other end of each elastic piece is connected with a positioning seat arranged on the inner wall of the end cover.
Preferably, the valve body is connected with an electromagnetic unloading valve, the oil inlet end of the electromagnetic unloading valve is communicated with the main oil inlet, and the oil outlet end of the electromagnetic unloading valve is communicated with the main oil return port.
Preferably, the main oil inlet, the main oil return port, the first oil outlet and the second oil outlet are all positioned on the first end face of the valve body, the secondary oil inlet, the secondary oil return port, the third oil outlet and the fourth oil outlet are all positioned on the second end face of the valve body, and the first end face and the second end face of the valve body are respectively arranged at two ends of the valve body.
Preferably, annular steps which shrink inwards in the radial direction are arranged at the two ends of the valve rod, a base is connected to the annular steps, and one end, close to the valve rod, of the elastic piece is connected with the base.
After the structure is adopted, compared with the prior art, the pumping main valve has the following advantages: compared with the two switching valve cavities of the high-pressure switching valve cavity and the low-pressure switching valve cavity integrated in the integrated pumping main valve in the prior art, the pumping main valve has the advantages that the low-pressure switching valve cavity is removed from the valve body, only one switching valve cavity is reserved, the switching valve cavity is substantially the high-pressure switching valve cavity, four oil outlets which are communicated with rodless cavities of an external pumping oil cylinder are arranged on the valve body, and the valve rod action in the switching valve cavity is controlled through an electromagnetic valve, so that hydraulic oil is distributed to the four oil outlets, and the alternating work of the external pumping oil cylinder is realized; the pumping main valve has only one switching valve cavity, has simple internal structure, convenient manufacture and low production cost, and provides enough space for the assembly of other accessories such as an on-off valve and a pressure relief valve; in addition, the pumping main valve can be matched with a pumping oil cylinder with a smaller diameter, so that the pumping oil cylinder can be rapidly moved and switched, and the working efficiency of the pumping oil cylinder is improved; the pumping main valve distributes high-pressure hydraulic oil through a single switching valve cavity, so that the use of the pumping oil cylinder under the working condition of high pressure and high load can be met, and the maximum pump meter number of the pumping system of the oil pump and the bearing of higher concrete pumping load are realized.
Drawings
Fig. 1 is a schematic diagram of a pumping main valve according to the present invention.
Fig. 2 is a schematic front view of a pumping main valve according to the present invention.
FIG. 3 is a schematic view of another angular configuration of a pumping main valve of the present invention.
Fig. 4 is a schematic cross-sectional view of a switching valve chamber of a pumping main valve of the present invention.
Fig. 5 is a schematic diagram of the control principle of a pumping master valve according to the present invention.
As shown in the figure:
1. valve body, 100, first end face, 101, second end face, 102, main oil inlet, 103, main oil return port, 104, secondary oil inlet, 105, secondary oil return port, 106, first oil outlet, 107, second oil outlet, 108, third oil outlet, 109, fourth oil outlet, 2, switching valve cavity, 200, first oil inlet, 201, first oil return port, 202, first switching oil port, 203, second switching oil port, 3, valve rod, 300, annular step, 4, first solenoid valve, 400, second solenoid valve, 401, second oil inlet, 402, second oil return port, 403, third switching oil port, 404, third oil inlet, 405, third oil return port, 406, fourth switching oil port, 5, electromagnetic unloading valve, 6, end cover, 600, first control oil cavity, 601, second control oil cavity, 602, positioning seat, 603, base, 604, and elastic member.
Detailed Description
The invention will be described in further detail with reference to the drawings and the specific examples.
See fig. 1-5;
the invention relates to a pumping main valve, which is connected to a pump truck and other machines, is connected with an oil pump, and is used for inputting oil of the oil pump to a first oil cylinder and a second oil cylinder, controlling the first oil cylinder and the second oil cylinder to act alternately, wherein the first oil cylinder and the second oil cylinder in the embodiment are pumping oil cylinders; the pumping main valve structurally comprises a valve body 1, wherein a main oil inlet 102, a main oil return opening 103, a secondary oil inlet 104 and a secondary oil return opening 105 which are communicated with control oil are arranged on the valve body; the valve body 1 is provided with a first oil outlet 106 and a second oil outlet 107 which are communicated with the rodless cavity oil port of the first oil cylinder group, and a third oil outlet 108 and a fourth oil outlet 109 which are communicated with the rodless cavity oil port of the second oil cylinder group; the main oil inlet 102, the main oil return opening 103, the first oil outlet 106 and the second oil outlet 107 are all positioned on the first end face 100 of the valve body 1, the secondary oil inlet 104, the secondary oil return opening 105, the third oil outlet 108 and the fourth oil outlet 109 are all positioned on the second end face 101 of the valve body 1, and the first end face 100 and the second end face 101 of the valve body 1 are respectively arranged at two ends of the valve body 1.
A switching valve cavity 2 is integrally arranged in the valve body 1, the switching valve cavity 2 is provided with a first oil inlet 200 communicated with a main oil inlet 102, a first oil return port 201 communicated with a main oil return port 103, a first switching oil port 202 communicated with a first oil outlet 106 and a second oil outlet 107 and a second switching oil port 203 communicated with a third oil outlet 108 and a fourth oil outlet 109, a valve rod 3 capable of moving back and forth is in clearance fit in the switching valve cavity 2, and the valve rod 3 can enable the first oil inlet 200 to be communicated with the first switching oil port 202 and the first oil return port 201 to be communicated with the second switching oil port 203, or enable the first oil inlet 200 to be communicated with the second switching oil port 203 and the first switching oil port 202 to be communicated with the first oil return port 201; the valve body 1 is connected with an electromagnetic valve for controlling the valve rod 3 to reciprocate in the switching valve cavity 2, and the electromagnetic valve comprises a first electromagnetic valve 4 and a second electromagnetic valve 400 which are respectively arranged at two sides of the valve body 1, and control oil at two ends of the valve rod 3 is respectively controlled. In this embodiment, the valve body 1 at two ends of the switching valve cavity 2 is connected with an end cover 6, and two control oil cavities are respectively arranged between two ends of the valve rod 3 and the two end covers 6: a first control oil chamber 600 and a second control oil chamber 601; the first electromagnetic valve 4 controls the control oil of the secondary oil inlet 104 to enter or flow out of the first control oil cavity 600, and the second electromagnetic valve 400 controls the control oil of the secondary oil inlet 104 to enter or flow out of the second control oil cavity 601.
Compared with the two switching valve cavities of the high-pressure switching valve cavity and the low-pressure switching valve cavity integrated in the integrated pumping main valve in the prior art, the pumping main valve has the advantages that the low-pressure switching valve cavity is removed from the valve body 1, only one switching valve cavity 2 is reserved, the switching valve cavity 2 is essentially the high-pressure switching valve cavity, four oil outlets which are communicated with rodless cavities of an external pumping oil cylinder are arranged on the valve body 1, and the action of the valve rod 3 in the switching valve cavity 2 is controlled through an electromagnetic valve, so that hydraulic oil is distributed to the four oil outlets, and the alternating work of the external pumping oil cylinder is realized; the pumping main valve has only one switching valve cavity 2, has simple internal structure, convenient manufacture and low production cost, and provides enough space for the assembly of other accessories such as an on-off valve and a pressure relief valve. In addition, the pumping main valve can be matched with a pumping oil cylinder with a smaller diameter, so that the pumping oil cylinder can be rapidly moved and switched, and the working efficiency of the pumping oil cylinder is improved; the pumping main valve distributes high-pressure hydraulic oil through a single switching valve cavity, so that the use of the pumping oil cylinder under the working condition of high pressure and high load can be met, and the maximum pump meter number of the pumping system of the oil pump and the bearing of higher concrete pumping load are realized.
Referring to fig. 4 and 5, as an embodiment of the present invention, an elastic member 604 is disposed in each of the two control oil chambers, one end of the elastic member 604 is connected to the end of the valve stem 3, and the other end of the elastic member 604 is connected to a positioning seat 602 mounted on the inner wall of the end cap 6. The two ends of the valve rod 3 are respectively provided with an annular step 300 which contracts inwards in the radial direction, the annular step 300 is connected with a base 603, and one end of the elastic piece 604, which is close to the valve rod 3, is connected with the base 603. Specifically, a first oil inlet hole is formed in the inner wall of the first control oil chamber 600, and a second oil inlet hole is formed in the inner wall of the second control oil chamber 601; the first electromagnetic valve 4 comprises a second oil inlet 401, a second oil return port 402 and a third switching oil port 403, wherein the second oil inlet 401 is communicated with the secondary oil inlet 104 of control oil, the second oil return port 402 is communicated with the secondary oil return port 105, and the third switching oil port 403 is communicated with the first oil inlet; the first electromagnetic valve 4 acts to control the control oil to enter or flow out of the first control oil cavity 600 through the third switching oil port 403, so as to drive the end part of the valve rod 3 to act; the second electromagnetic valve 400 comprises a third oil inlet 404, a third oil return port 405 and a fourth switching oil port 406, wherein the third oil inlet 404 is communicated with the secondary oil inlet 104 of control oil, the third oil return port 405 is communicated with the secondary oil return port 105, and the fourth switching oil port 406 is communicated with the second oil inlet; the second solenoid valve 400 operates to control the control oil to enter or exit the second control oil chamber 601 through the fourth switching oil port 406, thereby driving the end portion of the valve stem 3 to operate.
Referring to fig. 5 again, as an embodiment of the present invention, the valve body 1 is connected with an electromagnetic unloading valve 5, an oil inlet end of the electromagnetic unloading valve 5 is communicated with a main oil inlet 102, and an oil outlet end of the electromagnetic unloading valve 5 is communicated with a main oil return opening 103. The electromagnetic unloading valve 5 is convenient for establishing the pressure in the valve body 1 of the pumping main valve, and under the action of the electromagnetic unloading valve 5, the pressure in the valve body 1 reaches the set highest value, so that the oil supply pressure is ensured.
In the description of the present invention, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," "outer," and the like indicate an orientation or a positional relationship based on that shown in the drawings or during actual use, merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," "fourth," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present invention should be included in the present invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Claims (3)
1. A pumping main valve, characterized by: it comprises
The valve body is provided with a main oil inlet, a main oil return port and a secondary oil inlet and a secondary oil return port which are communicated with control oil; the valve body is provided with a first oil outlet and a second oil outlet which are communicated with the rodless cavity oil port of the first oil cylinder group, and a third oil outlet and a fourth oil outlet which are communicated with the rodless cavity oil port of the second oil cylinder group;
the switching valve cavity is arranged in the valve body and is provided with a first oil inlet communicated with the main oil inlet, a first oil return port communicated with the main oil return port, a first switching oil port communicated with the first oil outlet and the second oil outlet and a second switching oil port communicated with the third oil outlet and the fourth oil outlet, and a valve rod capable of moving back and forth is arranged in the switching valve cavity in a clearance fit manner, so that the first oil inlet is communicated with the first switching oil port and the first oil return port is communicated with the second switching oil port, or the first oil inlet is communicated with the second switching oil port and the first switching oil port is communicated with the first oil return port;
the electromagnetic valve is connected to the valve body and used for controlling the valve rod to reciprocate in the switching valve cavity so that hydraulic oil of the main oil inlet is distributed to four oil outlets, and the first oil cylinder group and the second oil cylinder group work alternately;
an end cover is connected to the valve body at two ends of the switching valve cavity, and two control oil cavities are respectively arranged between two ends of the valve rod and the two end covers: a first control oil chamber and a second control oil chamber;
the electromagnetic valves are two: a first solenoid valve and a second solenoid valve; the first electromagnetic valve controls the control oil of the secondary oil inlet to enter or flow out of the first control oil cavity, and the second electromagnetic valve controls the control oil of the secondary oil inlet to enter or flow out of the second control oil cavity;
elastic pieces are arranged in the two control oil cavities, one end of each elastic piece is connected with the end part of the valve rod, and the other end of each elastic piece is connected with a positioning seat arranged on the inner wall of the end cover;
the two ends of the valve rod are provided with annular steps which shrink inwards in the radial direction, the annular steps are connected with a base, and one end of the elastic piece, which is close to the valve rod, is connected with the base; the method comprises the steps of,
the inner wall of the first control oil cavity is provided with a first oil inlet hole, and the inner wall of the second control oil cavity is provided with a second oil inlet hole; the first electromagnetic valve comprises a second oil inlet, a second oil return port and a third switching oil port, the second oil inlet is communicated with a secondary oil inlet of control oil, the second oil return port is communicated with the secondary oil return port, and the third switching oil port is communicated with the first oil inlet; the first electromagnetic valve is used for controlling control oil to enter or flow out of the first control oil cavity through the third switching oil port, so that the end part of the valve rod is driven to act;
the second electromagnetic valve comprises a third oil inlet, a third oil return port and a fourth switching oil port, the third oil inlet is communicated with a secondary oil inlet of control oil, the third oil return port is communicated with the secondary oil return port, and the fourth switching oil port is communicated with the second oil inlet; the second electromagnetic valve is used for controlling control oil to enter or flow out of the second control oil cavity through the fourth switching oil port, so that the end part of the valve rod is driven to act.
2. A pumping main valve as defined in claim 1, wherein: the electromagnetic unloading valve is characterized in that the valve body is connected with an electromagnetic unloading valve, an oil inlet end of the electromagnetic unloading valve is communicated with the main oil inlet, and an oil outlet end of the electromagnetic unloading valve is communicated with the main oil return port.
3. A pumping main valve as defined in claim 1, wherein: the main oil inlet, the main oil return port, the first oil outlet and the second oil outlet are all positioned on the first end face of the valve body, the secondary oil inlet, the secondary oil return port, the third oil outlet and the fourth oil outlet are all positioned on the second end face of the valve body, and the first end face and the second end face of the valve body are respectively arranged at two ends of the valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111367510.9A CN114321057B (en) | 2021-11-18 | 2021-11-18 | Pumping main valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111367510.9A CN114321057B (en) | 2021-11-18 | 2021-11-18 | Pumping main valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114321057A CN114321057A (en) | 2022-04-12 |
| CN114321057B true CN114321057B (en) | 2023-10-20 |
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ID=81047132
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111367510.9A Active CN114321057B (en) | 2021-11-18 | 2021-11-18 | Pumping main valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114321057B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201039990A (en) * | 2009-05-06 | 2010-11-16 | Cong Rui Entpr Co Ltd | Fixture |
| CN102168696A (en) * | 2011-05-03 | 2011-08-31 | 三一重工股份有限公司 | High-low pressure switching control system, concrete pumping system and device |
| EP3029325A1 (en) * | 2014-12-02 | 2016-06-08 | Mitsubishi Heavy Industries, Ltd. | Spool valve, hydraulic machine, and wind turbine power generating apparatus |
| CN106382389A (en) * | 2016-11-23 | 2017-02-08 | 贵州大学 | Guide oil way control switching valve and working method thereof |
| CN111852972A (en) * | 2020-06-30 | 2020-10-30 | 宁波斯特林科技有限公司 | Integrated mortar pump control valve |
| CN112096683A (en) * | 2020-09-01 | 2020-12-18 | 宁波斯特林科技有限公司 | Integrated pumping main valve |
| CN212250662U (en) * | 2020-06-30 | 2020-12-29 | 宁波斯特林科技有限公司 | Integrated mortar pump control valve |
| CN212803798U (en) * | 2020-06-30 | 2021-03-26 | 宁波斯特林科技有限公司 | Distribution valve of swing oil cylinder |
| CN213419545U (en) * | 2020-09-01 | 2021-06-11 | 斯特林液压制造(宁波)有限公司 | Integrated pumping main valve |
| CN213419539U (en) * | 2020-09-01 | 2021-06-11 | 斯特林液压制造(宁波)有限公司 | Pumping main valve |
-
2021
- 2021-11-18 CN CN202111367510.9A patent/CN114321057B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201039990A (en) * | 2009-05-06 | 2010-11-16 | Cong Rui Entpr Co Ltd | Fixture |
| CN102168696A (en) * | 2011-05-03 | 2011-08-31 | 三一重工股份有限公司 | High-low pressure switching control system, concrete pumping system and device |
| EP3029325A1 (en) * | 2014-12-02 | 2016-06-08 | Mitsubishi Heavy Industries, Ltd. | Spool valve, hydraulic machine, and wind turbine power generating apparatus |
| CN106382389A (en) * | 2016-11-23 | 2017-02-08 | 贵州大学 | Guide oil way control switching valve and working method thereof |
| CN111852972A (en) * | 2020-06-30 | 2020-10-30 | 宁波斯特林科技有限公司 | Integrated mortar pump control valve |
| CN212250662U (en) * | 2020-06-30 | 2020-12-29 | 宁波斯特林科技有限公司 | Integrated mortar pump control valve |
| CN212803798U (en) * | 2020-06-30 | 2021-03-26 | 宁波斯特林科技有限公司 | Distribution valve of swing oil cylinder |
| CN112096683A (en) * | 2020-09-01 | 2020-12-18 | 宁波斯特林科技有限公司 | Integrated pumping main valve |
| CN213419545U (en) * | 2020-09-01 | 2021-06-11 | 斯特林液压制造(宁波)有限公司 | Integrated pumping main valve |
| CN213419539U (en) * | 2020-09-01 | 2021-06-11 | 斯特林液压制造(宁波)有限公司 | Pumping main valve |
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| CN114321057A (en) | 2022-04-12 |
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