CN114321057A - Pumping main valve - Google Patents
Pumping main valve Download PDFInfo
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- CN114321057A CN114321057A CN202111367510.9A CN202111367510A CN114321057A CN 114321057 A CN114321057 A CN 114321057A CN 202111367510 A CN202111367510 A CN 202111367510A CN 114321057 A CN114321057 A CN 114321057A
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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 which are communicated with control oil are arranged on the valve body; 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 provided with a first oil inlet, a first oil return opening, a first switching oil opening and a second switching oil opening, a valve rod capable of moving back and forth is in clearance fit in the switching valve cavity, the valve rod can enable the first oil inlet to be communicated with the first switching oil opening and the first oil return opening to be communicated with the second switching oil opening, or enable the first oil inlet to be communicated with the second switching oil opening and the first switching oil opening to be communicated with the first oil return opening; and the electromagnetic valve is connected to the valve body and is used for controlling the valve rod to reciprocate in the switching valve cavity. The pumping main valve is small in size, simple and compact in structure, low in production cost, fast in switching oil supply reaction and capable of providing enough space for assembling 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 construction machinery and construction machinery, a plurality of devices such as a pump truck, an excavator, a loader, an excavator and the like are required to bear load or perform actions by virtue of a cylinder, and the actions of the cylinder are generally controlled by a control valve; if the pump truck needs to alternately act the pumping oil cylinder and the swing oil cylinder when in work, the alternate action between the pumping oil cylinder and the alternate action between the pumping oil cylinder and the swing oil cylinder need to be controlled by a pumping main valve, namely the pumping main valve controls a mortar pump to supply oil to the pumping oil cylinder or the swing oil cylinder, so that the alternate action between the pumping oil cylinder and the alternate action between the pumping oil cylinder and the swing oil cylinder are realized. The pumping main valve in the prior art has two structures, one is a separate type and the other is an integrated type, the separate type is that an electromagnetic switching valve is assembled 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 formed by integrating an electromagnetic switching valve inside the pumping main valve; taking an integrated pumping main valve as an example, in the integrated pumping main valve in the prior art, 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, 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 works alternatively through the action of valve rods in the high-pressure switching valve cavity and the low-pressure switching valve cavity. Two switching valve cavities are arranged in the valve body of the integrated pumping main valve in the prior art, so that the internal structure of the valve body is complex, and the production cost is high; the assembly space of other parts in the valve body, such as an on-off valve, a pressure release valve and the like, is narrow, so that the valve body is inconvenient to install and distribute; and the valve body has larger volume and less compact structure.
Disclosure of Invention
The main valve for pumping provided by the invention has the advantages of small volume, simple and compact structure, low production cost, fast oil supply switching response and capability of providing enough space for assembling other accessories.
The technical scheme of the 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 an oil port of a rodless cavity of the first oil cylinder group, and a third oil outlet and a fourth oil outlet which are communicated with an oil port of a rodless cavity of the second oil cylinder group;
the switching valve cavity is provided with a first oil inlet communicated with the main oil inlet, a first oil return opening communicated with the main oil return opening, a first switching oil opening communicated with the first oil outlet and the second oil outlet, and a second switching oil opening communicated with the third oil outlet and the fourth oil outlet, a valve rod capable of moving back and forth is in clearance fit in the switching valve cavity, the valve rod can enable the first oil inlet to be communicated with the first switching oil opening and the first oil return opening to be communicated with the second switching oil opening, or enable the first oil inlet to be communicated with the second switching oil opening and the first switching oil opening to be communicated with the first oil return opening;
and the electromagnetic valve is connected to the valve body and is used for controlling the valve rod to reciprocate in the switching valve cavity.
Preferably, all be connected with an end cover on the valve body of switching valve chamber both ends, be equipped with two control oil pockets between the both ends of valve rod and two end covers respectively: 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, the two control oil cavities are internally provided with elastic pieces, one ends of the elastic pieces are connected with the end parts of the valve rods, and the other ends of the elastic pieces are connected with positioning seats arranged on the inner walls of the end covers.
Preferably, 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.
Preferably, the main oil inlet, the main oil return port, the first oil outlet and the second oil outlet are all located on a 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 located on a second end face of the valve body, and the first end face and the second end face of the valve body are respectively located at two ends of the valve body.
Preferably, both ends of the valve rod are provided with annular steps which are radially retracted inwards, 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.
After adopting the structure, compared with the prior art, the pumping main valve has the following advantages: compared with two switching valve cavities, namely a high-pressure switching valve cavity and a low-pressure switching valve cavity, which are integrated in an integrated pumping main valve in the prior art, the pumping main valve is characterized in 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 essentially the high-pressure switching valve cavity, four oil outlets which are all communicated with a rodless cavity of an external pumping oil cylinder are arranged on the valve body, and a valve rod in the switching valve cavity is controlled by an electromagnetic valve to act, so that hydraulic oil is distributed to the four oil outlets, and the external pumping oil cylinder can alternatively work; the pumping main valve is provided with only one switching valve cavity, the internal structure of the pumping main valve is simple, the manufacturing is convenient, the production cost is low, and enough space is provided for assembling other accessories such as on-off valves and pressure relief valves; in addition, the pumping main valve can be matched with a pumping oil cylinder with a smaller drift diameter, so that the pumping oil cylinder can move and switch rapidly, and the working efficiency of the pumping oil cylinder is improved; the pumping main valve distributes high-pressure hydraulic oil through the single switching valve cavity, so that the use of the pumping oil cylinder under the high-pressure high-load working condition can be met, and the maximum pumping number of an oil pump pumping system and the bearing of higher concrete pumping load are realized.
Drawings
Fig. 1 is a schematic diagram of the construction of a pumping main valve of 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 cavity of a pumping main valve of the present invention.
Fig. 5 is a schematic view of the control principle of a pumping main valve according to the present invention.
As shown in the figure:
1. the hydraulic control valve comprises a valve body, 100, a first end face, 101, a second end face, 102, a main oil inlet, 103, a main oil return port, 104, a secondary oil inlet, 105, a secondary oil return port, 106, a first oil outlet, 107, a second oil outlet, 108, a third oil outlet, 109, a fourth oil outlet, 2, a switching valve cavity, 200, a first oil inlet, 201, a first oil return port, 202, a first switching oil port, 203, a second switching oil port, 3, a valve rod, 300, an annular step, 4, a first electromagnetic valve, 400, a second electromagnetic valve, 401, a second oil inlet, 402, a second oil return port, 403, a third switching oil port, 404, a third oil inlet, 405, a third oil return port, 406, a fourth switching oil port, 5, an electromagnetic unloading valve, 6, an end cover, 600, a first control oil cavity, 601, a second control oil cavity, 602, a positioning seat, 603, a base, 604 and an elastic piece.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples.
As shown in fig. 1 to 5;
the invention relates to a pumping main valve, which is connected to machinery such as a pump truck and the like, 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 and controlling the first oil cylinder and the second oil cylinder to alternately act; the pumping main valve structurally comprises a valve body 1, wherein a main oil inlet 102, a main oil return port 103, a secondary oil inlet 104 and a secondary oil return port 105 which are communicated with control oil are arranged on the valve body; a first oil outlet 106 and a second oil outlet 107 which are communicated with an oil port of a rodless cavity of the first oil cylinder group, and a third oil outlet 108 and a fourth oil outlet 109 which are communicated with an oil port of a rodless cavity of the second oil cylinder group are arranged on the valve body 1; the main oil inlet 102, the main oil return port 103, the first oil outlet 106 and the second oil outlet 107 are all located on a first end surface 100 of the valve body 1, the secondary oil inlet 104, the secondary oil return port 105, the third oil outlet 108 and the fourth oil outlet 109 are all located on a second end surface 101 of the valve body 1, and the first end surface 100 and the second end surface 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 the main oil inlet 102, a first oil return opening 201 communicated with the main oil return opening 103, a first switching oil opening 202 communicated with the first oil outlet 106 and the second oil outlet 107, and a second switching oil opening 203 communicated with the third oil outlet 108 and the fourth oil outlet 109, a valve rod 3 capable of moving back and forth is in clearance fit in the switching valve cavity 2, the valve rod 3 can enable the first oil inlet 200 to be communicated with the first switching oil opening 202 and the first oil return opening 201 to be communicated with the second switching oil opening 203, or enable the first oil inlet 200 to be communicated with the second switching oil opening 203 and the first switching oil return opening 202 to be communicated with the first oil return opening 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, 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, all be connected with an end cover 6 on the valve body 1 who switches 2 both ends of valve pocket, be equipped with two control oil pockets between the both ends of valve rod 3 and two end covers 6 respectively: 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 two switching valve cavities, namely a high-pressure switching valve cavity and a low-pressure switching valve cavity, which are integrated in an 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 a rodless cavity of an external pumping oil cylinder are arranged on the valve body 1, and a valve rod 3 in the switching valve cavity 2 is controlled to act through an electromagnetic valve, so that hydraulic oil is distributed to the four oil outlets, and the external pumping oil cylinder can work alternately; the pumping main valve is provided with only one switching valve cavity 2, has simple internal structure, convenient manufacture and low production cost and provides enough space for assembling other accessories such as on-off valves and pressure relief valves. In addition, the pumping main valve can be matched with a pumping oil cylinder with a smaller drift diameter, so that the pumping oil cylinder can move and switch rapidly, and the working efficiency of the pumping oil cylinder is improved; the pumping main valve distributes high-pressure hydraulic oil through the single switching valve cavity, so that the use of the pumping oil cylinder under the high-pressure high-load working condition can be met, and the maximum pumping number of an oil pump pumping system 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 rod 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 cover 6. The two ends of the valve rod 3 are both provided with annular steps 300 which are radially retracted inwards, the annular steps 300 are connected with a base 603, and one end, close to the valve rod 3, of the elastic part 604 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, the second oil inlet 401 is communicated with a secondary oil inlet 104 of control oil, the second oil return port 402 is communicated with a secondary oil return port 105, and the third switching oil port 403 is communicated with a first oil inlet hole; the first solenoid 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 solenoid 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 a secondary oil inlet 104 of the control oil, the third oil return port 405 is communicated with a secondary oil return port 105, and the fourth switching oil port 406 is communicated with a second oil inlet; the second solenoid valve 400 operates to control the control oil to enter or flow out of the second control oil chamber 601 through the fourth switching port 406, thereby driving the end of the rod 3 to operate.
Referring to fig. 5 again, as an embodiment of the present invention, an electromagnetic unloading valve 5 is connected to the valve body 1, an oil inlet end of the electromagnetic unloading valve 5 is communicated with the main oil inlet 102, and an oil outlet end of the electromagnetic unloading valve 5 is communicated with the main oil return 103. The electromagnetic unloading valve 5 is arranged to facilitate the establishment of the pressure in the valve body 1 of the pumping main valve, and the pressure in the valve body 1 reaches the set maximum value under the action of the electromagnetic unloading valve 5, so that the oil supply pressure is ensured.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings or during actual use, are used for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed 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 relative importance or implicit to a number of indicated technical features.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (6)
1. A pumping main valve, characterized by: it comprises
The valve body is provided with 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; the valve body is provided with a first oil outlet and a second oil outlet which are communicated with an oil port of a rodless cavity of the first oil cylinder group, and a third oil outlet and a fourth oil outlet which are communicated with an oil port of a rodless cavity of the second oil cylinder group;
the switching valve cavity is provided with a first oil inlet communicated with the main oil inlet, a first oil return opening communicated with the main oil return opening, a first switching oil opening communicated with the first oil outlet and the second oil outlet, and a second switching oil opening communicated with the third oil outlet and the fourth oil outlet, a valve rod capable of moving back and forth is in clearance fit in the switching valve cavity, the valve rod can enable the first oil inlet to be communicated with the first switching oil opening and the first oil return opening to be communicated with the second switching oil opening, or enable the first oil inlet to be communicated with the second switching oil opening and the first switching oil opening to be communicated with the first oil return opening;
and the electromagnetic valve is connected to the valve body and is used for controlling the valve rod to reciprocate in the switching valve cavity.
2. A pumping main valve according to claim 1, wherein: all be connected with an end cover on the valve body of switching valve pocket both ends, be equipped with two control oil pockets between the both ends of valve rod and two end covers respectively: 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.
3. A pumping main valve according to claim 2, wherein: elastic pieces are arranged in the two control oil cavities, one end of each elastic piece is connected with the end portion of the corresponding valve rod, and the other end of each elastic piece is connected with a positioning seat arranged on the inner wall of the corresponding end cover.
4. A pumping main valve according to claim 1, wherein: the electromagnetic unloading valve is connected to the valve body, 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.
5. A pumping main valve according to claim 1, wherein: the main oil inlet, the main oil return port, the first oil outlet and the second oil outlet are all located on a 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 located on a second end face of the valve body, and the first end face and the second end face of the valve body are respectively located at two ends of the valve body.
6. A pumping main valve according to claim 3, wherein: the two ends of the valve rod are provided with annular steps which are radially retracted inwards, the annular steps are connected with a base, and one end, close to the valve rod, of the elastic part is connected with the base.
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 true CN114321057A (en) | 2022-04-12 |
| CN114321057B CN114321057B (en) | 2023-10-20 |
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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 |
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| 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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| CN114321057B (en) | 2023-10-20 |
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