CN112096683B - Integrated pumping main valve - Google Patents
Integrated pumping main valve Download PDFInfo
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- CN112096683B CN112096683B CN202010903712.XA CN202010903712A CN112096683B CN 112096683 B CN112096683 B CN 112096683B CN 202010903712 A CN202010903712 A CN 202010903712A CN 112096683 B CN112096683 B CN 112096683B
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- switching
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/01—Locking-valves or other detent i.e. load-holding devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
- F16K11/20—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by separate actuating members
- F16K11/22—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by separate actuating members with an actuating member for each valve, e.g. interconnected to form multiple-way valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B2013/002—Modular valves, i.e. consisting of an assembly of interchangeable components
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Multiple-Way Valves (AREA)
Abstract
The invention discloses an integrated pumping main valve which comprises a valve body, a high-pressure switching valve cavity, a low-pressure switching valve cavity and an on-off valve component, wherein 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, a first oil outlet communicated with a rod cavity oil port of a first oil cylinder and a second oil outlet communicated with a rodless cavity oil port of the first oil cylinder are arranged on the valve body, the valve body is provided with a third oil outlet communicated with a rod cavity oil port of the second oil cylinder and a fourth oil outlet communicated with a rodless cavity oil port of the second oil cylinder, the high-pressure switching valve cavity and the low-pressure switching valve cavity are integrated in the valve body, one end of the high-pressure switching valve cavity and the low-pressure switching valve cavity are communicated with the rod cavity of the first oil cylinder, the other end of the high-pressure switching valve cavity is communicated with the rod cavity of the second oil cylinder, and the on-off valve component is used for controlling the communication or disconnection of an oil path between the rod cavity of the first oil cylinder and the rod cavity of the second oil cylinder. The integrated pumping main valve has the advantages of small volume, simple structure, convenient installation, short oil supply path, low oil flow resistance, low pressure loss and quick oil supply switching reaction.
Description
Technical Field
The invention relates to the technical field of hydraulic control systems of engineering machinery, in particular to an integrated pumping main valve.
Background
In the field of engineering machinery and construction machinery, there are many devices, such as a pump truck, an excavator, a loader, a busy excavator at two ends and the like, which need to bear load or execute action by means of an oil cylinder, and the action of the oil cylinder is generally controlled by a control valve, for example, when the pump truck works, the pumping oil cylinder and the swinging oil cylinder need to alternately act, and the alternate action between the pumping oil cylinder and the alternate action between the pumping oil cylinder and the swinging oil cylinder need to be controlled by a pumping main valve, namely, the pumping main valve controls mortar to pump the pumping oil cylinder or the swinging oil cylinder to supply oil so as to realize the alternate action between the pumping oil cylinder and the alternate action between the pumping oil cylinder and the swinging oil cylinder. The pumping main valve comprises a base, wherein a main oil inlet communicated with a mortar pump, an oil return port communicated with an oil tank, an oil outlet and an oil return port communicated with two oil ports of at least one pumping oil cylinder, and an oil outlet and an oil return port communicated with two oil ports of a swinging oil cylinder are arranged on the base, a first electromagnetic switching valve and a second electromagnetic switching valve are connected to the top of the base, the first electromagnetic switching valve controls the main oil inlet to supply oil to the oil outlet of the pumping oil cylinder or the main oil inlet to supply oil to the oil return port of the pumping oil cylinder, and the second electromagnetic switching valve controls the main oil inlet to supply oil to the oil outlet of the swinging oil cylinder or the main oil inlet to supply oil to the oil return port of the swinging oil cylinder. The pumping main valve in the prior art has the following defects that firstly, two or at least two electromagnetic switching valves are arranged at the top of a base, the size of the whole pumping main valve is increased, the installation limit is more, the connecting structure is complex and the installation is inconvenient, and secondly, the distance between the electromagnetic switching valves and an oil outlet, an oil return port and a main oil inlet on the base is longer, and the length of an oil path connected between the electromagnetic switching valves is longer, so that the flow resistance of oil is larger, the oil pressure loss is high, the switching response is slow, and the oil outlet pressure is insufficient when the pumping main valve supplies oil. Moreover, in order to realize the alternate expansion and contraction work of the two parallel pumping cylinders, the two parallel pumping cylinders are generally communicated and linked, the rod cavity oil ports of the two pumping cylinders are directly communicated by adopting a cylinder communication valve or an on-off valve, and the rodless cavity oil ports of the two pumping cylinders are directly communicated by adopting a cylinder communication valve or an on-off valve, but the communication valve or the on-off valve in the prior art is generally arranged on a base, so that the volume of the base is certainly increased, and the pressure loss is larger when the oil pressure passes through the pipeline connection part of the communication valve, so that the defects of insufficient oil supply pressure and the like are caused.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the integrated pumping main valve which has the advantages of small volume, simple structure, convenient installation, short oil supply path, low oil flow resistance, low pressure loss and quick switching oil supply reaction.
The technical proposal of the invention is to provide an integrated pumping main valve with the following structure, which comprises
The valve body is provided with a main oil inlet communicated with the oil pump and a main oil return port communicated with an external oil tank, a first oil outlet communicated with a rod cavity oil port of the first oil cylinder and a second oil outlet communicated with a rodless cavity oil port of the first oil cylinder, and a third oil outlet communicated with a rod cavity oil port of the second oil cylinder and a fourth oil outlet communicated with a rodless cavity oil port of the second oil cylinder;
The high-pressure 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 second oil outlet and a second switching oil port communicated with the fourth oil outlet, and a first switching valve rod capable of moving back and forth is in clearance fit with the high-pressure switching valve cavity, and the first switching 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;
The low-pressure switching valve cavity is arranged in the valve body and is provided with a second oil inlet communicated with the main oil inlet, a second oil return port communicated with the main oil return port, a third switching oil port communicated with the first oil outlet and a fourth switching oil port communicated with the third oil outlet, and a second switching valve rod capable of moving back and forth is in clearance fit in the low-pressure switching valve cavity, and the second switching valve rod can enable the second oil inlet to be communicated with the third switching oil port and the second oil return port to be communicated with the fourth switching oil port or enable the second oil inlet to be communicated with the fourth switching oil port and the third switching oil port to be communicated with the second oil return port;
The first electromagnetic valve group is connected to the valve body and used for driving the first switching valve rod to reciprocate in the high-pressure switching valve cavity;
The second electromagnetic valve group is connected to the valve body and used for driving the second switching valve rod to reciprocate in the low-pressure switching valve cavity;
The first on-off valve assembly is arranged in the valve body, one end of the first on-off valve assembly is communicated with the rod cavity oil port of the first oil cylinder, and the other end of the first on-off valve assembly is communicated with the rod cavity oil port of the second oil cylinder and is used for controlling the communication or disconnection of an oil circuit between the rod cavity of the first oil cylinder and the rod cavity of the second oil cylinder.
As an improvement, the third switching oil port is communicated with the first oil outlet through a first oil path channel, the fourth switching oil port is communicated with the third oil outlet through a second oil path channel, the first on-off valve assembly is arranged between the first oil path channel and the second oil path channel, one end of the first on-off valve assembly is communicated with the first oil path channel, and the other end of the first on-off valve assembly is communicated with the second oil path channel.
As an improvement, the first locking mechanism is communicated with the oil way in which the first switching oil port and the second oil outlet in the valve body are communicated with the second locking mechanism, the oil way in which the second switching oil port and the fourth oil outlet are communicated with each other, the valve body is connected with an electromagnetic control oil valve, a control oil inlet of the electromagnetic control oil valve is communicated with the main oil inlet, and a control oil outlet of the electromagnetic control oil valve is respectively communicated with the first locking mechanism and the second locking mechanism and used for controlling the first locking mechanism and the second locking mechanism to act so that the oil way in which the first switching oil port and the second oil outlet are communicated and the oil way in which the second switching oil port and the fourth oil outlet are communicated are disconnected.
The valve body is internally provided with a swing cylinder switching valve cavity, the swing cylinder switching valve cavity is provided with a third oil inlet communicated with the secondary oil inlet, a third oil return port communicated with the secondary oil return port, a fifth switching oil port communicated with the fifth oil outlet and a sixth switching oil port communicated with the sixth oil outlet, a third switching valve rod capable of moving in a reciprocating mode is matched in the swing cylinder switching valve cavity in a clearance mode, the third switching valve rod can enable the third oil inlet to be communicated with the fifth switching oil port and the third oil return port to be communicated with the sixth switching oil port or enable the third oil inlet to be communicated with the sixth switching oil port and the fifth switching oil port to be communicated with the third oil return port, and the third electromagnetic valve group is connected to the valve body and used for driving the third switching valve rod to move in the swing cylinder switching valve cavity in a reciprocating mode.
The first on-off valve assembly comprises an on-off valve cavity which is arranged in a valve body and is positioned above a low-pressure switching valve cavity, one end of the on-off valve cavity is communicated with a first oil path channel, the other end of the on-off valve cavity is communicated with a second oil path channel, the outer end of the on-off valve cavity is connected with a first cover plate, an annular stepped hole which is communicated with the first oil path channel and the second oil path channel is arranged in the on-off valve cavity, an on-off valve core is matched in a sliding mode, a spring cavity is arranged between the tail end of the on-off valve core and the first cover plate, a compression spring is arranged in the spring cavity and has a movement trend that the head of the on-off valve core is sealed with the annular stepped hole, a first control oil channel which is communicated with the spring cavity is arranged on the first cover plate and is used for being connected with an electromagnetic control valve, and control oil in the electromagnetic control valve enters or flows out of the spring cavity through the first control oil channel.
Preferably, the outer side wall of the on-off valve core is provided with a first concave annular groove, the first annular groove is positioned in the on-off valve cavity close to the second oil path channel, and the area of the inner side wall of the first annular groove, which is far away from the head part of the on-off valve core, is larger than that of the inner side wall of the first annular groove, which is close to the head part of the on-off valve core.
Preferably, a third oil path channel is arranged between the first switching oil port and the second oil outlet, and a fourth oil path channel is arranged between the second switching oil port and the fourth oil outlet; the first locking mechanism comprises a first locking valve cavity arranged in the valve body, the first locking valve cavity is communicated with a third oil way channel, the outer end of the first locking valve cavity is connected with a second cover plate, a first annular hole is arranged in the third oil way channel, a first locking valve core is slidably matched in the first locking valve cavity, a first locking cavity is arranged between the tail end of the first locking valve core and the second cover plate, a first elastic piece is arranged in the first locking valve cavity, the first elastic piece is provided with a movement trend for enabling the head part of the first locking valve core to be sealed with the first annular hole, a second control oil channel communicated with the first locking cavity is arranged on the second cover plate, the second control oil channel is connected with a control oil outlet of the electromagnetic control oil valve, control oil in the electromagnetic control oil valve enters or flows out of the first locking cavity through the second control oil channel, the second locking valve cavity arranged in the valve body, the second locking valve cavity is communicated with the fourth oil way channel, the outer end of the second locking valve cavity is connected with the third cover plate, the second elastic piece is arranged in the second cover plate, the second locking valve cavity is communicated with the second annular hole is arranged in the second oil way channel, the second locking valve cavity is communicated with the second annular hole, the second control oil channel is communicated with the second control oil outlet, and the second valve channel is communicated with the second control oil channel through the second control oil channel, control oil in the electromagnetic control oil valve enters or flows out of the second locking cavity through the third control oil channel.
Preferably, the outer side wall of the first locking valve core is provided with a concave second annular groove which is positioned in a third oil path channel close to the second oil outlet, the area of the inner side wall of the second annular groove on the side far away from the head of the first locking valve core is larger than the area of the inner side wall of the second annular groove on the side near the head of the first locking valve core, the outer side wall of the second locking valve core is provided with a concave third annular groove which is positioned in a fourth oil path channel near the fourth oil outlet, and the area of the inner side wall of the third annular groove on the side far away from the head of the second locking valve core is larger than the area of the inner side wall of the third annular groove on the side near the head of the second locking valve core.
Preferably, the high-pressure switching valve cavity and the low-pressure switching valve cavity are communicated through a plurality of oil channels, and the high-pressure switching valve cavity and the low-pressure switching valve cavity are both positioned below the main oil inlet, and an oil supply channel with a large outer end and a small inner end is arranged between the main oil inlet and the first oil inlet.
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.
After the structure is adopted, compared with the prior art, the integrated pumping main valve has the advantages that the integrated pumping main valve integrates the high-pressure switching valve cavity, the low-pressure switching valve cavity and the swing cylinder switching valve cavity in the valve body, a main oil inlet communicated with the oil pump and a main oil return port communicated with an external oil tank, a first oil outlet communicated with a rod cavity oil port of a first oil cylinder, a second oil outlet communicated with a rodless cavity oil port of the first oil cylinder, a third oil outlet communicated with a rod cavity oil port of a second oil cylinder and a fourth oil outlet communicated with a rodless cavity oil port of the second oil cylinder are integrated in the valve body, and a first on-off valve component for enabling an oil path communicated with the first switching oil port and the second oil outlet and an oil path disconnected from the fourth oil outlet is integrated in the valve body, so that the integrated pumping main valve is high in integration degree and small in size, is convenient to transport and install, and the first on-off valve component is integrated with a first on-off valve component for enabling the first oil path communicated with the second oil outlet and the second oil outlet to be connected with the fourth oil outlet through the first oil outlet and the second oil outlet, and the second oil outlet through the high-pressure switching oil outlet and the second oil outlet and the third oil outlet and the second oil outlet are short on-pressure oil outlet and the lower than the first oil outlet and the oil outlet.
Drawings
Fig. 1 is a schematic front view of an integrated pump main valve of the present invention.
Fig. 2 is a schematic diagram of the back side structure of the integrated pumping main valve of the present invention.
Fig. 3 is a schematic view of another angular configuration of the integrated pumping main valve of the present invention.
Fig. 4 is a schematic diagram of the control principle of the integrated pumping master valve of the present invention.
Fig. 5 is a schematic cross-sectional view of the main oil inlet of the integrated pumping main valve of the present invention.
Fig. 6 is a schematic cross-sectional structural view of a high pressure switching valve chamber and a low pressure switching valve chamber of the integrated pumping main valve of the present invention.
Fig. 7 is a schematic cross-sectional view of a first on-off valve assembly of the integrated pump main valve of the present invention.
Fig. 8 is a schematic cross-sectional view of the latching mechanism of the integrated pump main valve of the present invention.
As shown in the figure:
1. valve body, 100, main oil inlet, 101, main oil return port, 102, first oil outlet, 103, second oil outlet, 104, third oil outlet, 105, fourth oil outlet, 106, fifth oil outlet, 107, sixth oil outlet, 108, secondary oil inlet, 109, secondary oil return port, 110, main oil inlet, 111, oil passage, 2, high-pressure switching valve cavity, 200, first oil inlet, 201, first oil return port, 202, first switching oil port, 203, second switching oil port, 204, first switching valve rod, 205, third oil passage, 206, fourth oil passage, 3, low-pressure switching valve cavity, 300, second oil inlet, 301, second oil return port, 302, third switching oil port, 303, fourth switching oil port, 304, second switching valve rod, 305, first oil passage, 306, second oil passage, 4, first locking mechanism, 400, first locking valve cavity, 401, second cover plate, 402, second control oil passage, 403, first latching spool, 404, first latching chamber, 405, first elastic member, 406, second annular groove, 407, first annular hole, 5, second latching mechanism, 500, second latching valve chamber, 501, third cover plate, 502, third control oil passage, 503, second latching spool, 504, second latching chamber, 505, second elastic member, 506, third annular groove, 507, second annular hole, 6, electromagnetic control oil valve, 7, first on-off valve assembly, 700, on-off valve chamber, 701, first cover plate, 702, on-off spool, 703, spring chamber, 704, compression spring, 705, first control oil passage, 706, first annular groove, 707, annular stepped hole, 8, first electromagnetic valve set, 800, second electromagnetic valve set, 9, electromagnetic unloading valve, 10, swing cylinder switching valve chamber, 1000, third oil inlet, 1001, third oil return port, 1002. the fifth switching oil port, 1003, the sixth switching oil port, 1004, the third switching valve rod, 11, the third electromagnetic valve group, 12, the first oil cylinder, 13, the second oil cylinder, 14 and the second switching valve assembly.
Detailed Description
The invention will be described in further detail with reference to the drawings and the specific examples.
See fig. 1-8;
The invention relates to an integrated 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 12, a second oil cylinder 13 and a swinging oil cylinder, controlling the first oil cylinder 12, the second oil cylinder 13 and the swinging oil cylinder to act, wherein the first oil cylinder 12 and the second oil cylinder 13 in the embodiment are pumping oil cylinders; the integrated pumping main valve structurally comprises a valve body 1, wherein a main oil inlet 100 communicated with an oil pump and a main oil return port 101 communicated with an external oil tank are arranged on the valve body 1, a first oil outlet 102 communicated with a rod cavity oil port of a first oil cylinder 12 and a second oil outlet 103 communicated with a rodless cavity oil port of the first oil cylinder 12 are arranged on the valve body 1, a third oil outlet 104 communicated with a rod cavity oil port of a second oil cylinder 13 and a fourth oil outlet 105 communicated with a rodless cavity oil port of the second oil cylinder 13 are arranged on the valve body 1, a secondary oil inlet 108 and a secondary oil return port 109 are also arranged on the valve body 1, a fifth oil outlet 106 communicated with a first oil port of a swinging oil cylinder and a sixth oil outlet 107 communicated with a second oil port of the swinging oil cylinder are also arranged on the valve body 1, the second oil outlet 103, the fourth oil outlet 105 and the main oil inlet 100 are all located on a first end face of the valve body 1, the first oil outlet 102, the secondary oil return port 109 and the main oil return port 101 are all located on a second end face adjacent to the first end face of the valve body 1, the fifth oil outlet 106, the sixth oil outlet 107 and the secondary oil port 108 are all located on a third end face opposite to the first end face of the valve body 1, and the fourth end face is located on the fourth end face opposite to the fourth end face of the valve body 1.
The invention discloses an integrated pumping main valve, which further comprises a high-pressure switching valve cavity 2, wherein the high-pressure switching valve cavity 2 is arranged in a valve body 1, the high-pressure switching valve cavity 2 is provided with a first oil inlet 200 communicated with a main oil inlet 100, a first oil return port 201 communicated with a main oil return port 101, a first switching oil port 202 communicated with a second oil outlet 103 and a second switching oil port 203 communicated with a fourth oil outlet 105, a first switching valve rod 204 capable of moving back and forth is matched with the high-pressure switching valve cavity 2 in a clearance mode, the first switching valve rod 204 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 enable the first switching oil port 202 to be communicated with the first oil return port 201, a first electromagnetic valve set 8 is connected to the valve body 1 and is used for driving the first switching valve rod 204 to reciprocate in the high-pressure switching valve cavity 2, two ends of the high-pressure switching valve cavity 2 are respectively provided with an end cover, a control oil cavity is arranged between two ends of the first switching valve rod 204 and two end covers, the first electromagnetic valve cavity 204 and the two end covers can enable the first electromagnetic valve rod 204 to flow out of the control oil to flow into the first electromagnetic valve cylinder or the first electromagnetic valve cavity to control oil cylinder to move back and forth in the high-pressure switching valve cavity. The rodless cavity of the first oil cylinder or the second oil cylinder is supplied with oil by adopting high-pressure switching valve cavity because of larger cross section area, so that the rodless cavity of the first oil cylinder or the second oil cylinder can be filled with oil rapidly, the response time of the action of the first oil cylinder or the second oil cylinder is short, and the working efficiency is high.
The low-pressure switching valve cavity 3 is arranged in the valve body 1 and is arranged side by side with the high-pressure switching valve cavity 2, the low-pressure switching valve cavity 3 is provided with a second oil inlet 300 communicated with the main oil inlet 100, a second oil return port 301 communicated with the main oil return port 101, a third switching oil port 302 communicated with the first oil outlet 102 and a fourth switching oil port 303 communicated with the third oil outlet 104, a second switching valve rod 304 capable of reciprocating is in clearance fit with the low-pressure switching valve cavity 3, the second switching valve rod 304 can enable the second oil inlet 300 to be communicated with the third switching oil port 302 and the second oil return port 301 to be communicated with the fourth switching oil port 303, or enable the second oil inlet 300 to be communicated with the fourth switching oil port 303 and the third switching oil port 302 to be communicated with the second oil return port 301, a second electromagnetic valve block 800 is connected to the valve body 1 and is used for driving the second switching valve rod 304 to reciprocate in the low-pressure switching valve cavity 3, two ends of the low-pressure switching valve cavity 3 are respectively provided with an end cover, and a control oil flow out control rod is arranged between two ends of the second switching valve rod 304 and two end covers, and the control oil flow out control rod 800 is enabled to reciprocate in the low-pressure switching valve cavity 3, so that the second oil cylinder can reciprocate in the low-pressure switching valve cavity 3. The rod cavity of the first oil cylinder or the second oil cylinder has relatively small cross section area, and the low pressure is adopted to switch the valve cavity to supply oil with lower pressure, so that the oil supply pressure of the first oil cylinder or the second oil cylinder is balanced.
The invention relates to an integrated pumping main valve, which also comprises a first on-off valve component 7, wherein the first on-off valve component is arranged in a valve body 1, one end of the first on-off valve component is communicated with a rod cavity oil port of a first oil cylinder 12, and the other end of the first on-off valve component is communicated with a rod cavity oil port of a second oil cylinder 13 and is used for controlling the communication or disconnection of an oil way between the rod cavity of the first oil cylinder 12 and the rod cavity of the second oil cylinder 13. Of course, a second on-off valve assembly 14 is communicated between the rodless cavity oil ports of the first oil cylinder and the second oil cylinder, the second on-off valve assembly 14 is used for controlling the communication or disconnection between the rodless cavity oil ports of the first oil cylinder and the second oil cylinder, when the first on-off valve assembly 7 enables an oil path between the rod cavities of the first oil cylinder 12 and the second oil cylinder 13 to be communicated, and when the second on-off valve assembly 14 enables the oil path between the rod cavities of the first oil cylinder 12 and the second oil cylinder 13 to be communicated, the first oil cylinder 12 and the second oil cylinder 13 can supply oil mutually in the alternative action, and the oil supply pressure of the main oil inlet 100 is relieved.
Referring again to fig. 5 and 7, as an embodiment of the present invention, the third switching oil port 302 is communicated with the first oil outlet 102 through a first oil path channel 305, the fourth switching oil port 303 is communicated with the third oil outlet 104 through a second oil path channel 306, the first on-off valve assembly 7 is arranged between the first oil path channel 305 and the second oil path channel 306, one end of the first on-off valve assembly 7 is communicated with the first oil path channel 305, and the other end of the first on-off valve assembly 7 is communicated with the second oil path channel 306. The first on-off valve assembly 7 comprises an on-off valve cavity 700 which is arranged in the valve body 1 and is positioned above the low-pressure switching valve cavity 3, one end of the on-off valve cavity 700 is communicated with the first oil path channel 305, the other end of the on-off valve cavity 700 is communicated with the second oil path channel 306, the outer end of the on-off valve cavity 700 is connected with a first cover plate 701, an annular step hole 707 which is communicated with the first oil path channel 305 and the second oil path channel 306 is arranged in the on-off valve cavity 700, an on-off valve core 702 is slidably matched in the on-off valve cavity 700, a spring cavity 703 is arranged between the tail end of the on-off valve core 702 and the first cover plate 701, a compression spring 704 is arranged in the spring cavity 703, the compression spring 704 has a movement trend that the head of the on-off valve core 702 is sealed with the annular step hole 707, and a first control oil channel 705 which is communicated with the spring cavity 703 is arranged on the first cover plate 701 and is used for being connected with the electromagnetic control valve, so that control oil in the electromagnetic control valve enters or flows out of the spring cavity 703 through the first control oil channel 705. The outer side wall of the on-off valve core 702 is provided with a first concave annular groove 706, the first annular groove 706 is located in the on-off valve cavity 700 close to the second oil path channel 306, and the area of the inner side wall of the first annular groove 706, which is far away from the head of the on-off valve core 702, is larger than that of the inner side wall of the first annular groove 706, which is close to the head of the on-off valve core 702. When the first oil path channel 305 and the second oil path channel 306 are communicated, the electromagnetic control valve controls oil in the spring cavity 703 to flow out, oil pressure in the first oil path channel 305 overcomes the elasticity of the compression spring 704 to enable the head of the on-off valve core 702 to separate from the annular stepped hole 707 to enable the first oil path channel 305 and the second oil path channel 306 to be communicated, otherwise, when the oil pressure in the second oil path channel 306 and the second oil path channel 305 are communicated, the oil pressure in the second oil path channel 306 overcomes the elasticity of the compression spring 704 to enable the inner side wall of the first annular groove 706 of the on-off valve core 702 to be stressed to enable the head of the on-off valve core 702 to separate from the annular stepped hole 707 to enable the first oil path channel 305 and the second oil path channel 306 to be communicated, when the first oil path channel 305 and the second oil path channel 306 are disconnected, the electromagnetic control valve controls oil to enter the spring cavity 703, and the on-off valve core 702 moves downwards under the oil pressure in the spring cavity 703 to enable the head of the on-off valve core 702 to abut against the annular stepped hole 707 to enable the first oil path channel 305 and the second oil path channel 306 to be disconnected.
Referring to fig. 6 and 8 again, as an embodiment of the present invention, the first locking mechanism 4 is connected to the oil path in which the first switching oil port 202 and the second oil outlet 103 in the valve body 1 are connected, the second locking mechanism 5 is connected to the oil path in which the second switching oil port 203 and the fourth oil outlet 105 are connected, the valve body 1 is connected with the electromagnetic control oil valve 6, the control oil inlet of the electromagnetic control oil valve 6 is connected to the main oil inlet 100, and the control oil outlet of the electromagnetic control oil valve 6 is respectively connected to the first locking mechanism 4 and the second locking mechanism 5, so as to control the first locking mechanism 4 and the second locking mechanism 5 to act, so that the oil path in which the first switching oil port 202 and the second oil outlet 103 are connected and the oil path in which the second switching oil port 203 and the fourth oil outlet 105 are disconnected. Specifically, a third oil path 205 is provided between the first switching oil port 202 and the second oil outlet 103, and a fourth oil path 206 is provided between the second switching oil port 203 and the fourth oil outlet 105; the first locking mechanism 4 comprises a first locking valve cavity 400 arranged in the valve body 1, the first locking valve cavity 400 is communicated with the third oil path 205, and the outer end of the first locking valve cavity 400 is connected with a second cover plate 401; a first annular hole 407 is disposed in the third oil passage 205, a first locking valve core 403 is slidably fitted in the first locking valve cavity 400, a first locking cavity 404 is disposed between the tail end of the first locking valve core 403 and the second cover plate 401, a first elastic member 405 is disposed in the first locking cavity 404, and the first elastic member 405 has a movement tendency that the head of the first locking valve core 403 is sealed with the first annular hole 407; the second cover plate 401 is provided with a second control oil channel 402 communicated with the first locking cavity 404, the second control oil channel 402 is connected with a control oil outlet of the electromagnetic control oil valve 6, so that control oil in the electromagnetic control oil valve 6 enters or flows out of the first locking cavity 404 through the second control oil channel 402, the second locking mechanism 5 comprises a second locking valve cavity 500 arranged in the valve body 1, the second locking valve cavity 500 is communicated with the fourth oil channel 206, the outer end of the second locking valve cavity 500 is connected with a third cover plate 501, a second annular hole 507 is arranged in the fourth oil channel 206, a second locking valve core 503 is slidably matched in the second locking valve cavity 500, a second locking cavity 504 is arranged between the tail end of the second locking valve core 503 and the third cover plate 501, a second elastic piece 505 is arranged in the second locking cavity 504, the second elastic member 505 has a movement tendency that the head of the second locking valve core 503 is sealed with the second annular hole 507, and the third cover plate 501 is provided with a third control oil channel 502 that is communicated with the second locking cavity 504, and the third control oil channel 502 is connected with a control oil outlet of the electromagnetic control oil valve 6, so that the control oil in the electromagnetic control oil valve 6 enters or flows out of the second locking cavity 504 through the third control oil channel 502. The outer side wall of the first locking valve core 403 is provided with a second concave annular groove 406, the second annular groove 406 is positioned in the third oil path 205 close to the second oil outlet 103, the area of the inner side wall of the second annular groove 406 far away from the head of the first locking valve core 403 is larger than the area of the inner side wall of the second annular groove 406 close to the head of the first locking valve core 403, the outer side wall of the second locking valve core 503 is provided with a third concave annular groove 506, the third annular groove 506 is positioned in the fourth oil path 206 close to the fourth oil outlet 105, and the area of the inner side wall of the third annular groove 506 far away from the head of the second locking valve core 503 is larger than the area of the inner side wall of the third annular groove 506 close to the head of the second locking valve core 503. The first locking mechanism 4 and the second locking mechanism 5 are arranged, when the second oil outlet 103 or the fourth oil outlet 105 supplies oil, the first locking mechanism 4 and the second locking mechanism 5 are in an open state, and oil in rodless cavities of the first oil cylinder and the second oil cylinder can be prevented from flowing back to the high-pressure switching valve cavity in the pressure maintaining or pressure stabilizing supporting process of the first oil cylinder and the second oil cylinder, so that the high-pressure switching valve cavity is damaged or the switching response is slower. The first locking mechanism 4 and the second locking mechanism 5 in the valve body are arranged in a reasonable structure, the length of an oil path between the high-pressure switching valve cavity and the second oil outlet 103 or the fourth oil outlet 105 is effectively shortened, and the oil pressure loss is low.
Referring to fig. 4 to 6 again, as an embodiment of the present invention, a tilt cylinder switching valve cavity 10 is provided in the valve body 1, the tilt cylinder switching valve cavity 10 has a third oil inlet 1000 communicating with the secondary oil inlet 108, a third oil return port 1001 communicating with the secondary oil return port 109, a fifth switching oil port 1002 communicating with the fifth oil outlet 106, and a sixth switching oil port 1003 communicating with the sixth oil outlet 107, and a third switching valve rod 1004 capable of reciprocally moving is gap-matched in the tilt cylinder switching valve cavity 10, and the third switching valve rod 1004 may enable the third oil inlet 1000 to communicate with the fifth switching oil port 1002 and the third oil return port 1001 to communicate with the sixth switching oil port 1003, or enable the third oil inlet 1000 to communicate with the sixth switching oil port 1003 and the fifth switching oil port 1002 to communicate with the third oil return port 1001, and a third electromagnetic valve set 11 is connected to the valve body 1 and is used for driving the third switching valve rod 1004 to reciprocally move in the tilt cylinder switching valve cavity 10. The structure of the swing cylinder switching valve cavity 10 is the same as that of the high-pressure switching valve cavity or the low-pressure switching valve cavity, and the oil supply switching mode is the same, and not described in detail in this embodiment, the third electromagnetic valve group 11 controls the control oil to enter the control oil cavities at two ends of the third switching valve rod 1004, so as to drive the third switching valve rod 1004 to reciprocate, thereby realizing intermittent oil supply of the fifth oil outlet 106 and the sixth oil outlet 107, and realizing reciprocating motion of the swing cylinder. The valve body is internally integrated with the tilt cylinder switching valve cavity 10, so that the length of an oil duct between the secondary oil inlet 108 and the fifth oil outlet 106 and between the sixth oil outlet 107 is shortened, the flow resistance of oil is small, the oil pressure loss is low, and the integration level of the valve body is high and the volume is small.
Referring to fig. 5 and 6 again, as an embodiment of the present invention, the high-pressure switching valve cavity 2 and the low-pressure switching valve cavity 3 are communicated through a plurality of oil channels 111, and the high-pressure switching valve cavity 2 and the low-pressure switching valve cavity 3 are located below the main oil inlet 100, and an oil supply channel 110 with a large outer end and a small inner end is arranged between the main oil inlet 100 and the first oil inlet 200. In addition, the arrangement of the positions of the high-pressure switching valve cavity 2 and the low-pressure switching valve cavity 3 and the arrangement of the shape of the oil supply channel 110 enable the oil entering the main oil inlet 100 to quickly enter the high-pressure switching valve cavity 2 and the low-pressure switching valve cavity 3, so that the flow resistance of the oil in the oil supply channel is further reduced, and the loss of the oil pressure is reduced.
Referring to fig. 1 and fig. 4 again, as an embodiment of the present invention, the valve body 1 is connected with an electromagnetic unloading valve 9, an oil inlet end of the electromagnetic unloading valve 9 is communicated with a main oil inlet 100, and an oil outlet end of the electromagnetic unloading valve 9 is communicated with a main oil return port 101. The electromagnetic unloading valve is convenient for establishing the pressure in the valve body of the integrated pumping main valve, and under the action of the electromagnetic unloading valve, the pressure in the valve body 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 (6)
1. An integrated pumping main valve is characterized by comprising
The valve body is provided with a main oil inlet communicated with the oil pump and a main oil return port communicated with an external oil tank; the valve body is provided with a first oil outlet communicated with a rod cavity oil port of the first oil cylinder and a second oil outlet communicated with a rodless cavity oil port of the first oil cylinder, and is provided with a third oil outlet communicated with the rod cavity oil port of the second oil cylinder and a fourth oil outlet communicated with the rodless cavity oil port of the second oil cylinder;
The high-pressure 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 second oil outlet and a second switching oil port communicated with the fourth oil outlet, and a first switching valve rod capable of moving back and forth is in clearance fit with the high-pressure switching valve cavity, and the first switching 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;
The low-pressure switching valve cavity is arranged in the valve body and is provided with a second oil inlet communicated with the main oil inlet, a second oil return port communicated with the main oil return port, a third switching oil port communicated with the first oil outlet and a fourth switching oil port communicated with the third oil outlet, and a second switching valve rod capable of moving back and forth is in clearance fit in the low-pressure switching valve cavity, and the second switching valve rod can enable the second oil inlet to be communicated with the third switching oil port and the second oil return port to be communicated with the fourth switching oil port or enable the second oil inlet to be communicated with the fourth switching oil port and the third switching oil port to be communicated with the second oil return port;
The first electromagnetic valve group is connected to the valve body and used for driving the first switching valve rod to reciprocate in the high-pressure switching valve cavity;
The second electromagnetic valve group is connected to the valve body and used for driving the second switching valve rod to reciprocate in the low-pressure switching valve cavity;
The first on-off valve assembly is arranged in the valve body, one end of the first on-off valve assembly is communicated with a rod cavity oil port of the first oil cylinder, the other end of the first on-off valve assembly is communicated with a rod cavity oil port of the second oil cylinder and is used for controlling the communication or disconnection of an oil path between the rod cavity of the first oil cylinder and the rod cavity of the second oil cylinder;
The first on-off valve assembly comprises an on-off valve cavity which is arranged in the valve body and is positioned above the low-pressure switching valve cavity, one end of the on-off valve cavity is communicated with the first oil path channel, and the other end of the on-off valve cavity is communicated with the second oil path channel; the outer end of the on-off valve cavity is connected with a first cover plate, and an annular step hole which is communicated with a first oil path channel and a second oil path channel is arranged in the on-off valve cavity; the on-off valve cavity is slidably matched with an on-off valve core, a spring cavity is arranged between the tail end of the on-off valve core and a first cover plate, a compression spring is arranged in the spring cavity, the compression spring has a movement trend of enabling the head of the on-off valve core to be sealed with an annular stepped hole, a first control oil channel communicated with the spring cavity is arranged on the first cover plate, and the first control oil channel is used for being connected with an electromagnetic control valve, so that control oil in the electromagnetic control valve enters or flows out of the spring cavity through the first control oil channel;
The outer side wall of the on-off valve core is provided with a first concave annular groove which is positioned in the on-off valve cavity close to the second oil path channel, and the area of the inner side wall of the first annular groove on the side far away from the head of the on-off valve core is larger than that of the inner side wall of the first annular groove on the side close to the head of the on-off valve core.
2. The integrated pumping main valve of claim 1, wherein a first locking mechanism is communicated with an oil path of the first switching oil port and the second oil port in the valve body, a second locking mechanism is communicated with an oil path of the second switching oil port and the fourth oil port, an electromagnetic control oil valve is connected to the valve body, a control oil inlet of the electromagnetic control oil valve is communicated with the main oil inlet, a control oil outlet of the electromagnetic control oil valve is respectively communicated with the first locking mechanism and the second locking mechanism, and the control oil outlet of the electromagnetic control oil valve is used for controlling the first locking mechanism and the second locking mechanism to act so as to disconnect the oil path of the first switching oil port and the second oil port and the oil path of the second switching oil port and the fourth oil port.
3. The integrated pumping main valve according to claim 1, wherein the valve body is further provided with a secondary oil inlet and a secondary oil return port, a fifth oil outlet communicated with a first oil port of the swing oil cylinder and a sixth oil outlet communicated with a second oil port of the swing oil cylinder, a swing cylinder switching valve cavity is arranged in the valve body, the swing cylinder switching valve cavity is provided with a third oil inlet communicated with the secondary oil inlet, a third oil return port communicated with the secondary oil return port, a fifth switching oil port communicated with the fifth oil outlet and a sixth switching oil port communicated with the sixth oil outlet, a third switching valve rod capable of moving back and forth is arranged in the swing cylinder switching valve cavity in a clearance fit mode, the third switching valve rod can enable the third oil inlet to be communicated with the fifth switching oil port and the third oil return port to be communicated with the sixth switching oil port or enable the third oil inlet to be communicated with the sixth switching oil port and the fifth switching oil port to be communicated with the third oil return port, and the third electromagnetic valve group is connected to the valve body and used for driving the third switching valve rod to move back and forth in the swing cylinder switching valve cavity.
4. The integrated main pumping valve of claim 2, wherein a third oil passage is provided between the first switching port and the second oil outlet, a fourth oil passage is provided between the second switching port and the fourth oil outlet, the first blocking mechanism comprises a first blocking valve cavity provided in the valve body and communicated with the third oil passage, and a second cover plate is connected to the outer end of the first blocking valve cavity, a first annular hole is provided in the third oil passage, a first blocking valve core is slidably fitted in the first blocking valve cavity, a first blocking cavity is provided between the tail end of the first blocking valve core and the second cover plate, a first elastic member is provided in the first blocking cavity, the first elastic member has a movement trend of sealing the head of the first blocking valve core with the first annular hole, a second control oil passage communicated with the first blocking cavity is provided on the second cover plate, the second control oil passage is connected with the control oil outlet of the electromagnetic control valve, the control oil in the electromagnetic control valve enters or exits the second valve cavity through the second control oil passage, a first blocking valve core is slidably fitted in the first blocking valve cavity, a first blocking valve core is provided in the second blocking valve cavity, a second elastic member is provided in the second blocking valve cavity is provided with a second blocking valve cavity communicated with the second annular hole, a second blocking valve cavity is provided in the second blocking valve cavity, a second elastic member is provided in the second blocking valve cavity is provided with a second blocking valve cavity communicated with the second annular hole, and is provided in the second blocking valve cavity, and is communicated with the second blocking valve cavity, and a second elastic member is provided with the second blocking valve cavity is provided with a second blocking valve cavity, the third control oil channel is connected with a control oil outlet of the electromagnetic control oil valve, so that control oil in the electromagnetic control oil valve enters or flows out of the second locking cavity through the third control oil channel.
5. The integrated pumping main valve of claim 4, wherein the outer side wall of the first locking valve core is provided with a concave second annular groove, the second annular groove is positioned in a third oil path channel close to the second oil outlet, the area of the inner side wall of the second annular groove on the side far away from the head of the first locking valve core is larger than the area of the inner side wall of the second annular groove on the side near the head of the first locking valve core, the outer side wall of the second locking valve core is provided with a concave third annular groove, the third annular groove is positioned in a fourth oil path channel close to the fourth oil outlet, and the area of the inner side wall of the third annular groove on the side far away from the head of the second locking valve core is larger than the area of the inner side wall of the third annular groove on the side near the head of the second locking valve core.
6. The integrated pumping main valve of claim 1, wherein the high-pressure switching valve cavity and the low-pressure switching valve cavity are communicated through a plurality of oil ducts, and the high-pressure switching valve cavity and the low-pressure switching valve cavity are positioned below the main oil inlet, and an oil supply channel with a large outer end and a small inner end is arranged between the main oil inlet and the first oil inlet.
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| CN202010903712.XA CN112096683B (en) | 2020-09-01 | 2020-09-01 | Integrated pumping main valve |
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| CN202010903712.XA CN112096683B (en) | 2020-09-01 | 2020-09-01 | Integrated pumping main valve |
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| CN112096683B true CN112096683B (en) | 2025-03-21 |
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| CN114321057B (en) * | 2021-11-18 | 2023-10-20 | 斯特林液压制造(宁波)有限公司 | Pumping main valve |
| CN115434964B (en) * | 2022-07-22 | 2025-07-01 | 浙江海宏液压科技股份有限公司 | Pumping system |
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| CN105351279A (en) * | 2015-11-13 | 2016-02-24 | 北汽福田汽车股份有限公司 | Pumping device and pumping hydraulic system thereof |
| 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2510974B2 (en) * | 1985-06-27 | 1996-06-26 | 三菱重工業株式会社 | Switching device for concrete pump |
| DE102005035981A1 (en) * | 2005-07-28 | 2007-02-01 | Putzmeister Ag | Hydraulic circuit arrangement, in particular for the drive of concrete distributor masts |
| CN202937535U (en) * | 2012-07-09 | 2013-05-15 | 长沙市凌云工程机械有限公司 | Hydraulic reversing combination valve |
| CN103615418B (en) * | 2013-11-29 | 2016-05-11 | 三一汽车制造有限公司 | Hydraulic system of pump and concrete pumping equipment |
| CN208345604U (en) * | 2018-06-25 | 2019-01-08 | 圣邦集团有限公司 | Closed system integrates switching valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102705274A (en) * | 2012-05-23 | 2012-10-03 | 中国重型机械研究院有限公司 | Belt-breaking protection system driven by hydraulic pressure |
| CN203394737U (en) * | 2013-05-13 | 2014-01-15 | 飞翼股份有限公司 | Concrete delivery pump integrated valve block with high-and-low voltage switching function |
| CN105351279A (en) * | 2015-11-13 | 2016-02-24 | 北汽福田汽车股份有限公司 | Pumping device and pumping hydraulic system thereof |
| 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 |
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Address after: 315100 1st floor, building 27, No.138, Lane 666, Jinshan Road, Jiangbei District, Ningbo City, Zhejiang Province Applicant after: Stirling hydraulic manufacturing (Ningbo) Co.,Ltd. Address before: 315100 1st floor, building 27, No.138, Lane 666, Jinshan Road, Jiangbei District, Ningbo City, Zhejiang Province Applicant before: Ningbo Stirling Technology Co.,Ltd. |
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