CN109458374B - Heavy load speed increasing valve - Google Patents
Heavy load speed increasing valve Download PDFInfo
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- CN109458374B CN109458374B CN201910013119.5A CN201910013119A CN109458374B CN 109458374 B CN109458374 B CN 109458374B CN 201910013119 A CN201910013119 A CN 201910013119A CN 109458374 B CN109458374 B CN 109458374B
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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
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Abstract
The invention provides a heavy load speed increasing valve, which relates to the technical field of speed increasing valves and comprises a valve body, wherein an A1 port, an A2 port, a B1 port and a B2 port are formed in the valve body, and a first on-off valve, a second on-off valve and a counterbalance valve are arranged in the valve body; the first on-off valve comprises a Qa port and a Qb port, the second on-off valve comprises a Wa port and a Wb port, the counterbalance valve comprises a Pa port, a Pb port and a Px port, and a pressure setting spring for setting the working pressure of the Pa port is further arranged in the counterbalance valve; the Qa port of the first on-off valve is communicated with the A1 port of the valve body, and the Qb port of the first on-off valve, the Wa port of the second on-off valve and the Pb port of the counterbalance valve are communicated with each other; the port B1 of the valve body, the port Wb of the second on-off valve, the port Px of the counterbalance valve and the port B2 of the valve body are communicated with each other; the Pa port of the counterbalance valve is communicated with the A2 port of the valve body; the A2 port of the valve body is communicated with a rod cavity of the oil cylinder, and the B2 port is communicated with a rodless cavity of the oil cylinder. When the valve is used, the interference of external load to the valve can be prevented, and the whole valve body is ensured to stably and reliably realize load-bearing work.
Description
Technical Field
The invention relates to the technical field of speed increasing valves, in particular to a heavy-load speed increasing valve.
Background
Compared with other transmission modes, the hydraulic transmission mode has the advantages of large power ratio and easiness in realizing heavy load under the same volume. The hydraulic element has small volume and light weight, so the inertia is small and the action is sensitive. Because of its small size and light weight, external loads are sensitive to hydraulic components. Particularly under the working condition of heavy load, unstable and even out-of-control actions of the hydraulic element often occur.
The speed increasing valve is a hydraulic element for increasing the movement speed of the oil cylinder on the premise of not increasing the flow rate of the oil pump. The speed increasing valve in the prior art adopts a slide valve structure, the speed can only be increased, the load position state can not be controlled, the slide valve structure is influenced by the load hydraulic power when the load is heavy, and the valve core is easy to lose control when the valve is reversed. When the speed increasing valve with the slide valve structure is used, the leakage amount is large and the efficiency is low, so that the system can generate heat, and the normal work is influenced. Therefore, a heavy load speed increasing valve needs to be designed to meet the use requirements of working conditions of high load, high-low speed stable switching and low leakage.
Disclosure of Invention
The invention aims to provide a heavy-load speed increasing valve which can obviously improve the speed of an executing element, reduce the output displacement of an oil pump, reduce the cost of system elements and meet the use requirements of working conditions of high load, high-low speed switching, no impact and low leakage.
The technical aim of the invention is realized by the following technical scheme:
the heavy load speed increasing valve comprises a valve body, wherein an A1 port, an A2 port, a B1 port and a B2 port are formed in the valve body, and a first on-off valve, a second on-off valve and a counterbalance valve are arranged in the valve body; the first on-off valve comprises a Qa port and a Qb port, the second on-off valve comprises a Wa port and a Wb port, the counter valve comprises a Pa port, a Pb port and a Px port, and a pressure setting spring for setting the working pressure of the Pa port is further arranged in the counter valve; the Qa port of the first on-off valve is communicated with the A1 port of the valve body, and the Qb port of the first on-off valve, the Wa port of the second on-off valve and the Pb port of the counterbalance valve are communicated with each other; the port B1 of the valve body, the port Wb of the second break valve, the port Px of the counterbalance valve and the port B2 of the valve body are communicated with each other; the Pa port of the counterbalance valve is communicated with the A2 port of the valve body; the port A2 of the valve body is communicated with a rod cavity of the oil cylinder, and the port B2 is communicated with a rodless cavity of the oil cylinder.
Through adopting above-mentioned technical scheme, the normal decline working process of hydro-cylinder is as follows, and fluid gets into the valve body from the A1 mouth of valve body, through the Qa mouth, the Qb mouth of first on-off valve, the Pb mouth, the Pa mouth of counterbalance valve, gets into the pole chamber of hydro-cylinder from the A2 mouth of valve body, promotes the hydro-cylinder piston and drives the heavy burden decline. At this time, the rodless cavity of the oil cylinder is in a compressed state, and oil in the rodless cavity enters the valve body through the port B2 of the valve body and flows out from the port B1 of the valve body to return to the oil collecting device. The working process of the load of the oil cylinder is as follows, oil enters the valve body from the port B1 of the valve body, flows out from the port B2 of the valve body and enters the rodless cavity of the oil cylinder, and pushes the piston of the oil cylinder to drive the load to rise. At this time, the rod cavity of the oil cylinder is in a compressed state, and when the working pressure of the rod cavity of the oil cylinder reaches the working pressure set value set by the pressure set spring in the counterbalance valve, the oil pressure of the Px port of the counterbalance valve pushes the valve core of the counterbalance valve to be opened. The oil flows through the Pa mouth, pb mouth, qb mouth and Qa mouth of the counter balance valve, and flows out of the valve body from the A1 mouth of the valve body. The pressure set by the pressure setting spring in the counter balance valve is used for counteracting the pressure generated by the load to the oil cylinder piston, and even if the load is heavy, the working environment pressure of the oil ports of the first on-off valve and the second on-off valve is the controllable pressure provided by the power unit, so that the whole valve body is ensured to realize the load work stably and reliably. The working process of the oil cylinder for realizing the load-bearing acceleration function is as follows, oil enters the valve body from the port B1 of the valve body, flows out from the port B2 of the valve body and enters the rodless cavity of the oil cylinder, and pushes the piston of the oil cylinder to drive the load to rise. At this time, the rod cavity of the oil cylinder is in a compressed state, and when the working pressure of the rod cavity reaches the working pressure set value set by the pressure set spring in the counterbalance valve, the oil pressure of the Px port of the counterbalance valve pushes the valve core of the counterbalance valve to open. Oil in a rod cavity of the oil cylinder enters the valve body from an A2 port of the valve body, flows through a Pa port and a Pb port of the counterbalance valve and Wa and Wb ports of the second on-off valve, flows out from a B2 port of the valve body and flows into a rodless cavity of the oil cylinder. Because the oil in the rod cavity of the oil cylinder flows into the rodless cavity of the oil cylinder, only little oil enters the rodless cavity of the oil cylinder from the port B1 and the port B2 of the valve body to drive the oil cylinder to act quickly. In the process, the counter valve in the valve body can counteract heavy load, so that the oil cylinder can still realize quick action under the condition of heavy load.
Further, the first on-off valve comprises a first spring position and a first electromagnetic change position, when the first on-off valve is positioned at the first spring position, oil can only flow from the Qa port to the Qb port, and the oil leakage amount from the Qb port to the Qa port is zero; when the first on-off valve is in a first electromagnetic change position, oil can flow through the Qa port and the Qb port.
Through adopting above-mentioned technical scheme, first spring position and first electromagnetism change to be used for controlling the flow direction of fluid in first break-make valve, according to the needs of in-service use switch first spring position and first electromagnetism change to. When the load bearing function of the oil cylinder is realized, the first on-off valve is positioned at a first electromagnetic change position so as to ensure that oil in a rod cavity of the oil cylinder can flow from a Qb port to a Qa port of the first on-off valve through the counterbalance valve and flow out of the valve body from an A1 port of the valve body, and thus the pressure set by the pressure setting spring in the counterbalance valve is used for counteracting the pressure generated by the load bearing on the piston of the oil cylinder, and the load bearing function of the oil cylinder is realized. When the load-bearing acceleration function of the oil cylinder is realized, the first on-off valve is positioned at the first spring position, oil can only flow from the Qa port to the Qb port, and therefore, the oil in the rod cavity of the oil cylinder can only enter the rodless cavity of the oil cylinder through the counter balance valve and the second on-off valve, so that the load-bearing acceleration function of the oil cylinder is realized.
Further, the second on-off valve comprises a second spring position and a second electromagnetic change position, when the second on-off valve is positioned at the second spring position, oil cannot flow between the Wa port and the Wb port, and oil leakage amount from the Wa port to the Wb port and from the Wb port to the Wa port is zero; when the second on-off valve is in a second electromagnetic change direction, oil can flow through the Wa port and the Wb port.
Through adopting above-mentioned technical scheme, second spring position and second electromagnetism change to be used for controlling the flow of fluid in the second on-off valve, according to the needs of actual use switch second spring position and second electromagnetism change to. When the load bearing function of the oil cylinder is realized, the second on-off valve is positioned at the second spring position, the first on-off valve is positioned at the first electromagnetic change position, so that oil can flow from the Qb port to the Qa port of the second on-off valve directly through the counterbalance valve and flow out of the valve body from the A1 port of the valve body, and the pressure set by the pressure setting spring in the counterbalance valve is used for counteracting the pressure generated by the load bearing on the piston of the oil cylinder, so that the load bearing function of the oil cylinder is realized. When the load-bearing acceleration function of the oil cylinder is realized, the second on-off valve is positioned at the second electromagnetic change position, the first on-off valve is positioned at the first spring position, oil can only flow from the Qa port to the Qb port, and therefore, the oil in the rod cavity of the oil cylinder can only enter the rodless cavity of the oil cylinder through the counter balance valve and the second on-off valve, so that the load-bearing acceleration function of the oil cylinder is realized.
Further, oil in the counter balance valve can freely flow from the Pb port to the Pa port, and when the pressure at the Pa port of the counter balance valve exceeds the working pressure set value set by the pressure setting spring, the oil pressure at the Px port of the counter balance valve pushes the valve core of the counter balance valve to be opened, and oil can flow from the Pa port to the Pb port.
By adopting the technical scheme, when the functions of load and load acceleration of the oil cylinder are realized, the oil pressure of the Px port of the counterbalance valve pushes the valve core of the counterbalance valve to be opened only when the working pressure of the rod cavity of the oil cylinder reaches the working pressure set value set by the pressure setting spring in the counterbalance valve. The first on-off valve is positioned at a first electromagnetic change position, the second on-off valve is positioned at a second spring position, and liquid flows through the Pa port and the Pb port of the counterbalance valve, the Qb port and the Qa port of the first on-off valve and flows out of the valve body from the A1 port of the valve body. Or the first on-off valve is positioned at a first spring position, the second on-off valve is positioned at a second electromagnetic change position, oil in a rod cavity of the oil cylinder enters the valve body from an A2 port of the valve body, flows through a Pa port, a Pb port of the counter balance valve and Wa and Wb ports of the second on-off valve, flows out of a B2 port of the valve body and flows into a rodless cavity of the oil cylinder. In the two working states, the pressure set by the pressure setting spring in the counter balance valve is used for counteracting the pressure generated by the load on the cylinder piston, and even if the load is very heavy, the working environment pressure of the oil ports of the first on-off valve and the second on-off valve is the controllable pressure provided by the power unit, so that the whole valve body is ensured to realize the load work stably and reliably.
Further, a first electromagnet plug is arranged on the first on-off valve, a second electromagnet plug is arranged on the second on-off valve, and the first electromagnet plug and the second electromagnet plug are both positioned outside the valve body.
Through adopting above-mentioned technical scheme, the first electro-magnet plug and the second electro-magnet plug that are arranged in the valve body are used for controlling the break-make of first electromagnetism in the first break-make valve to change to the position respectively and the second electromagnetism in the second break-make valve changes to the position, and the convenience is artifical to be controlled to satisfy the work demand under the different circumstances of this invention, and its simple structure, convenient operation and effect are obvious.
Further, a T1 port, a T2 port, a P1 port and a P2 port are further arranged on the valve body, the T1 port and the T2 port of the valve body are communicated, the P1 port and the P2 port are communicated, the T2 port of the valve body is connected with an oil return tank, and the P2 port is connected with an oil tank; and electromagnetic reversing valves are further connected among the A1 port, the B1 port, the T1 port and the P1 port of the valve body.
Through adopting above-mentioned technical scheme, the fluid in the fluid case passes through the electromagnetic valve after passing through P1 mouth and the P2 mouth of valve body, gets into the valve body from the A1 mouth or the B1 mouth of valve body according to actual operating condition. After the oil in the oil cylinder flows out of the valve body from the port A1 or the port B1, the oil flows back into the oil return tank from the port T1 and the port T2 of the valve body through the electromagnetic reversing valve, so that the oil is collected, and the waste of the oil is avoided. Under the reversing action of the electromagnetic reversing valve, oil inlet or oil return of the opening A1 and the opening B1 of the valve body is realized, the structure is effectively simplified, and the cost is reduced.
Further, a plurality of first communication holes and second communication holes which are vertically communicated with the first communication holes are formed in the valve body, and oil flows through the valve body, the first on-off valve, the second on-off valve and the counterbalance valve from the first communication holes and the transverse communication holes.
By adopting the technical scheme, under the guiding communication action of the first communication hole and the second communication hole, an oil inlet or oil return way of oil is formed, an oil pipe is not required to be arranged in the valve body, the structure in the valve body is simplified, the production and the manufacturing of the invention are convenient, the structure is simple, and the effect is obvious.
Further, the valve body is also provided with a process hole coaxially arranged with the second communication hole, one end of the process hole is communicated with the second communication hole, and the other end of the process hole penetrates through the end face of the valve body; and an oil plug is arranged in the process hole.
By adopting the technical scheme, when the valve body is manufactured, the process hole and the second communication hole can be synchronously processed, so that the second communication hole and the first communication hole are convenient to manufacture. And then an oil plug is arranged in the process hole, so that only the second communication hole and the first communication hole in the valve body are communicated, a flow path of oil is formed, and the oil is prevented from leaking out of the process hole. The valve body is simple in structure, production and manufacturing of the valve body are greatly facilitated, and production cost of the valve body is effectively reduced.
Further, the electromagnetic directional valve, the oil return tank, the oil tank, the rodless cavity and the rod cavity of the oil cylinder are connected with the valve body through pipelines, and the pipelines are communicated with the first communication hole.
Through adopting above-mentioned technical scheme, under the intercommunication effect of pipeline and first communication hole, form the oil circuit that fluid circulated, guarantee the normal supply and the recovery of fluid, and then guarantee under the auxiliary effect of this invention, the hydro-cylinder can realize heavy burden, heavy burden acceleration rate function, its simple structure, convenient operation and effect are obvious.
Further, the valve body is of a rectangular structure, and a plurality of mounting holes are formed in the end face of the valve body.
By adopting the technical scheme, the valve body with the rectangular structure is convenient to manufacture and install; the valve body is provided with the mounting holes so as to facilitate the mounting and use of the valve body, ensure that the mounting mode of the valve has universality, meet the mounting standard of valves, and have the advantages of simple structure, convenient operation and obvious effect.
In summary, the invention has the following beneficial effects:
1. the first on-off valve, the second on-off valve and the counterbalance valve are arranged in the valve body, the pressure setting spring is arranged in the counterbalance valve, the pressure set by the pressure setting spring is used for counteracting the pressure generated by the load on the cylinder piston, and even if the load is very heavy, the working environment pressure of the oil ports of the first on-off valve and the second on-off valve is the controllable pressure provided by the power unit, so that the whole valve body can realize the load work stably and reliably;
2. the process hole which is coaxial with and communicated with the second communication hole is arranged, and one end of the process hole, which is far away from the second communication hole, penetrates through the end face of the valve body, so that the second communication hole and the first communication hole are convenient to manufacture. Meanwhile, an oil plug is arranged in the process hole, so that only the second communication hole and the first communication hole in the valve body are communicated, a flow path of oil is formed, and oil is prevented from leaking out of the process hole.
Drawings
FIG. 1 is a schematic view of the overall structure of one of the views of a heavy load speed increasing valve;
FIG. 2 is a schematic overall construction of another view of the heavy load speed increasing valve;
fig. 3 is a schematic diagram of the operation of the heavy load speed increasing valve.
In the figure, 1, a valve body; 11. a first communication hole; 12. a second communication hole; 13. a process hole; 131. an oil plug; 14. a mounting hole; 2. a first on-off valve; 21. a first spring position; 22. a first electromagnetic change of direction; 221. a first electromagnet plug; 3. a second on-off valve; 31. a second spring position; 32. a second electromagnetic change of direction; 321. a second electromagnet plug; 4. a counterbalance valve; 41. a pressure setting spring; 5. an oil tank; 6. an oil return tank; 7. an electromagnetic reversing valve; 8. an oil cylinder; 81. a rod cavity is arranged; 82. a rodless cavity; 9. a pipeline.
Detailed Description
The invention will be described in further detail below with reference to the drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The utility model provides a heavy load speed increasing valve, is referenced with reference to fig. 1 and 2, is including being valve body 1 that the cuboid structure is equipped with A1 mouth, A2 mouth, B1 mouth, B2 mouth, T1 mouth, T2 mouth, P1 mouth and P2 mouth totally eight openings on valve body 1, and A1 mouth, B1 mouth, T1 mouth and P1 mouth are located one side, and A2 mouth, B2 mouth, T2 mouth and P2 mouth are located opposite side. Referring to fig. 3, the port T1 and the port T2 of the valve body 1 are communicated, the port P1 and the port P2 are communicated, the port T2 of the valve body 1 is connected with the oil return tank 6 through the pipe 9, and the port P2 is connected with the oil tank 5 through the pipe 9. Referring to fig. 3, an electromagnetic directional valve 7 is further connected between the A1 port, the B1 port, the T1 port, and the P1 port of the valve body 1 through a pipe 9. The electromagnetic directional valve 7 comprises a YA port, a YB port, a YT port and a YP port, wherein the A1 port of the valve body 1 is communicated with the YA port of the electromagnetic directional valve 7, the B1 port of the valve body 1 is communicated with the YB port of the electromagnetic directional valve 7, the T1 port of the valve body 1 is communicated with the YT port of the electromagnetic directional valve 7, and the P1 port of the valve body 1 is communicated with the YP port of the electromagnetic directional valve 7.
Referring to fig. 1 and 2, a first on-off valve 2, a second on-off valve 3, and a counter balance valve 4 are installed in a valve body 1, and referring to fig. 3, the first on-off valve 2 includes a Qa port and a Qb port, the second on-off valve 3 includes a Wa port and a Wb port, the counter balance valve 4 includes a Pa port, a Pb port, and a Px port, and a pressure setting spring 41 for setting the Pa port operating pressure is further provided in the counter balance valve 4. Referring to fig. 3, the Qa port of the first on-off valve 2 is communicated with the A1 port of the valve body 1, and the Qb port of the first on-off valve 2, the Wa port of the second on-off valve 3, and the Pb port of the counter balance valve 4 are communicated with each other. The port B1 of the valve body 1, the Wb port of the second shutoff valve 3, the Px port of the counter valve 4, and the port B2 of the valve body 1 are communicated with each other, and the Pa port of the counter valve 4 is communicated with the port A2 of the valve body 1. The port A2 of the valve body 1 is communicated with a rod cavity 81 of the oil cylinder 8 through a pipeline 9, and the port B2 is communicated with a rodless cavity 82 of the oil cylinder 8 through the pipeline 9.
In addition, referring to fig. 3, the first on-off valve 2 includes a first spring position 21 and a first electromagnetic shift position 22, and the second on-off valve 3 includes a second spring position 31 and a second electromagnetic shift position 32. Further, referring to fig. 1 and 3, the first on-off valve 2 and the second on-off valve 3 are provided with a first electromagnet plug 221 and a second electromagnet plug 321 electrically connected to the first electromagnetic change position 22 and the second electromagnetic change position 32, respectively, and the first electromagnet plug 221 and the second electromagnet plug 321 are located outside the valve body 1.
Referring to fig. 3, when the first on-off valve 2 is at the first spring position 21, oil can only flow from the Qa port to the Qb port, and oil cannot flow when the Qb port flows to the Qa port, and the oil leakage amount from the Qb port to the Qa port is zero. When the first on-off valve 2 is in the first electromagnetic switching direction 22, oil can flow from the Qa port to the Qb port or from the Qb port to the Qa port. When the second on-off valve 3 is at the second spring position 31, oil cannot flow from the Wa port to the Wb port, and oil cannot flow from the Wb port to the Wa port, and oil leakage amounts from the Wa port to the Wb port and from the Wb port to the Wa port are zero. When the second on-off valve 3 is in the second electromagnetic change direction 32, the oil can flow from the Wa port to the Wb port and also from the Wb port to the Wa port.
Referring to fig. 3, when the pressure at the Pa port of the counterbalance valve 4 exceeds the set operating pressure value set by the pressure setting spring 41, the oil pressure at the Px port of the counterbalance valve 4 pushes the spool of the counterbalance valve 4 to open, and at this time, the oil can flow from the Pa port to the Pb port.
Referring to fig. 3, in order to facilitate the flow of oil in the valve body 1, a plurality of first communication holes 11 and second communication holes 12 vertically communicating with the first communication holes 11 are provided in the valve body 1, and the oil flows through the valve body 1, the first on-off valve 2, the second on-off valve 3, and the counterbalance valve 4 from the first communication holes 11 and the lateral communication holes. Meanwhile, one end of the second communication hole 12 located on the end face of the valve body 1 is also connected to the pipe 9 corresponding thereto. In order to facilitate the manufacture of the second communication hole 12, referring to fig. 1, 2 and 3, a process hole 13 coaxially disposed and communicated with the second communication hole 12 is further disposed on the valve body 1, one end of the process hole 13 away from the second communication hole 12 penetrates through the end surface of the valve body 1, and an oil plug 131 is mounted in the process hole 13. In addition, in order to facilitate the installation of the valve body 1, referring to fig. 1, a plurality of installation holes 14 are provided on the end surface of the valve body 1 so as to conform to the installation standard of valve parts, and the installation mode has universality.
The working principle and the using method of the invention are as follows:
the load of the oil cylinder 8 has three working processes, including the descending of the oil cylinder 8, the ascending of the oil cylinder 8 and the quick ascending of the oil cylinder 8, wherein the ascending of the oil cylinder 8 realizes the load function of the oil cylinder 8, and the quick ascending of the oil cylinder 8 realizes the load acceleration function of the oil cylinder 8. The following three working processes of the structural cylinder 8 describe the working principle of the present invention.
Firstly, the oil cylinder 8 normally descends, referring to fig. 3, the end a of the electromagnetic directional valve 7 is powered on, oil in the oil tank 5 enters the valve body 1 from the port P2 of the valve body 1, enters the valve body 1 from the port A1 of the valve body 1 through the port P1 and the YP and YA ports of the electromagnetic directional valve 7, enters the rod cavity 81 of the oil cylinder 8 from the port A2 of the valve body 1 through the port Qa and Qb ports of the first on-off valve 2 and the port Pb and Pa port of the counterbalance valve 4, and pushes the piston of the oil cylinder 8 to drive the load to descend, and the rodless cavity 82 of the oil cylinder 8 is in a compressed state. Referring to fig. 3, the oil in the rodless chamber 82 enters the valve body 1 through the B2 port of the valve body 1, flows out from the B1 port of the valve body 1, and returns to the oil return tank 6 through the YB port, the YT port, and the T1 port and the T2 port of the electromagnetic directional valve 7 and the valve body 1.
The working process of realizing the load function of the oil cylinder 8, namely the lifting of the oil cylinder 8 is as follows, referring to fig. 3, the B end of the electromagnetic directional valve 7 is powered, oil in the oil tank 5 enters the valve body 1 from the P2 port of the valve body 1, enters the valve body 1 from the B1 port of the valve body 1 through the P1 port, the YP port and the YB port of the electromagnetic directional valve 7, flows out from the B2 port of the valve body 1 and enters the rodless cavity 82 of the oil cylinder 8, and pushes the piston of the oil cylinder 8 to drive the load to lift, so that the rod cavity 81 of the oil cylinder 8 is in a compressed state. Referring to fig. 3, when the operating pressure of the rod chamber 81 of the cylinder 8 reaches the operating pressure set value set by the pressure setting spring 41 in the counterbalance valve 4, the oil pressure of the Px port of the counterbalance valve 4 pushes the spool of the counterbalance valve 4 to open.
Referring to fig. 3, the first on-off valve 2 is switched to the first electromagnetic switching position 22, the second on-off valve 3 is switched to the second spring position 31, and the oil in the rod cavity 81 of the oil cylinder 8 flows through the Pa port, pb port, qb port, qa port of the counter valve 4, flows out of the valve body 1 from the A1 port of the valve body 1, and is returned to the oil return tank 6 from the YA port, YT port, T1 port, T2 port of the electromagnetic switching valve 7 and the valve body 1. Referring to fig. 3, the pressure set by the pressure setting spring 41 in the counter valve 4 is used to offset the pressure generated by the load on the piston of the cylinder 8, and even if the load is heavy, the working environment pressure of the oil ports of the first on-off valve 2 and the second on-off valve 3 is the controllable pressure provided by the power unit, and the switching of the first spring position 21 and the first electromagnetic switching position 22 of the first on-off valve 2 and the switching of the second spring position 31 and the second electromagnetic switching position 32 of the second on-off valve 3 is not affected by the load, so that the load work is ensured to be stably and reliably realized.
The working process of realizing the load increasing function of the oil cylinder 8, that is, the rapid rising of the oil cylinder 8 is as follows, the path of the oil entering the rodless cavity 82 of the oil cylinder 8 is the same as the path of the oil implementing the load increasing function of the oil cylinder 8, except that referring to fig. 3, the first on-off valve 2 is switched to the first spring position 21, and the second on-off valve 3 is switched to the second electromagnetic change position 32. At this time, the oil in the rod chamber 81 of the oil cylinder 8 enters the valve body 1 from the A2 port of the valve body 1, flows through the Pa port and Pb port of the counterbalance valve 4, and the Wa port and Wb port of the second on-off valve 3, flows out from the B2 port of the valve body 1, and flows into the rod-free chamber 82 of the oil cylinder 8. Referring to fig. 3, in this process, since the oil in the rod cavity 81 of the oil cylinder 8 flows into the rod-free cavity 82 of the oil cylinder 8, only a small amount of oil needs to enter the rod-free cavity 82 of the oil cylinder 8 from the port B1 and the port B2 of the valve body 1 to drive the oil cylinder 8 to act rapidly, and the efficiency and energy saving are achieved. Moreover, since the counter valve 4 in the valve body 1 can counteract the heavy load, the cylinder 8 can still realize a quick action in the case of heavy load.
The invention can be freely switched between the normal speed and the speed increasing mode, is simple and convenient, is suitable for heavy load working conditions, effectively realizes heavy load protection function, has good pressure maintaining effect and zero leakage, effectively reduces oil output displacement and reduces cost. In actual use, the oil cylinders 8 need to achieve the same speed, and the output flow of the oil liquid can be reduced by 50% by using the invention, so that the cost is obviously reduced.
While the foregoing description illustrates and describes the preferred embodiments of the present invention, as noted above, it is to be understood that the invention is not limited to the forms disclosed herein but is not to be construed as excluding other embodiments, and that various other combinations, modifications and environments are possible and may be made within the scope of the inventive concepts described herein, either by way of the foregoing teachings or by those of skill or knowledge of the relevant art. And that modifications and variations which do not depart from the spirit and scope of the invention are intended to be within the scope of the appended claims.
Claims (6)
1. The heavy load speed increasing valve comprises a valve body (1), and is characterized in that: the valve body (1) is provided with an A1 port, an A2 port, a B1 port and a B2 port, and a first on-off valve (2), a second on-off valve (3) and a counterbalance valve (4) are arranged in the valve body (1); the first on-off valve (2) comprises a Qa port and a Qb port, the second on-off valve (3) comprises a Wa port and a Wb port, the counter valve (4) comprises a Pa port, a Pb port and a Px port, and a pressure setting spring (41) for setting the working pressure of the Pa port is further arranged in the counter valve (4); the Qa port of the first on-off valve (2) is communicated with the A1 port of the valve body (1), and the Qb port of the first on-off valve (2), the Wa port of the second on-off valve (3) and the Pb port of the counter balance valve (4) are communicated with each other; the port B1 of the valve body (1), the port Wb of the second switching valve (3), the port Px of the counter balance valve (4) and the port B2 of the valve body (1) are communicated with each other; the Pa port of the counterbalance valve (4) is communicated with the A2 port of the valve body (1); the port A2 of the valve body (1) is communicated with a rod cavity (81) of the oil cylinder (8), and the port B2 is communicated with a rodless cavity (82) of the oil cylinder (8);
the first on-off valve (2) comprises a first spring position (21) and a first electromagnetic change position (22), when the first on-off valve (2) is positioned at the first spring position (21), oil can only flow from a Qa port to a Qb port, and the oil leakage amount from the Qb port to the Qa port is zero; when the first on-off valve (2) is positioned in a first electromagnetic change direction (22), oil can flow through the Qa port and the Qb port;
the second on-off valve (3) comprises a second spring position (31) and a second electromagnetic change position (32), when the second on-off valve (3) is positioned at the second spring position (31), oil cannot circulate between the Wa port and the Wb port, and oil leakage quantity from the Wa port to the Wb port and from the Wb port to the Wa port is zero; when the second on-off valve (3) is positioned in a second electromagnetic change direction (32), oil can flow through the Wa port and the Wb port;
the oil in the counter balance valve (4) can freely flow from the Pb port to the Pa port, and when the pressure at the Pa port of the counter balance valve (4) exceeds a working pressure set value set by a pressure set spring (41), the oil pressure at the Px port of the counter balance valve (4) pushes a valve core of the counter balance valve (4) to be opened, and the oil can flow from the Pa port to the Pb port;
the valve is characterized in that a first electromagnet plug (221) is arranged on the first on-off valve (2), a second electromagnet plug (321) is arranged on the second on-off valve (3), and the first electromagnet plug (221) and the second electromagnet plug (321) are both positioned outside the valve body (1).
2. The heavy load speed increasing valve according to claim 1, wherein: the valve body (1) is also provided with a T1 port, a T2 port, a P1 port and a P2 port, the T1 port and the T2 port of the valve body (1) are communicated, the P1 port and the P2 port are communicated, the T2 port of the valve body (1) is connected with an oil return tank (6), and the P2 port is connected with an oil tank (5); an electromagnetic reversing valve (7) is further connected among the A1 port, the B1 port, the T1 port and the P1 port of the valve body (1).
3. The heavy load speed increasing valve according to claim 2, wherein: a plurality of first communication holes (11) and second communication holes (12) which are vertically communicated with the first communication holes (11) are formed in the valve body (1), and oil flows through the valve body (1), the first on-off valve (2), the second on-off valve (3) and the counter valve (4) from the first communication holes (11) and the transverse communication holes.
4. A heavy load speed increasing valve according to claim 3, wherein: a process hole (13) which is coaxially arranged with the second communication hole (12) is also arranged on the valve body (1), one end of the process hole (13) is communicated with the second communication hole (12), and the other end of the process hole penetrates through the end face of the valve body (1); an oil plug (131) is arranged in the process hole (13).
5. A heavy load speed increasing valve according to claim 3, wherein: the electromagnetic reversing valve (7), the oil return tank (6), the oil tank (5), a rodless cavity (82) of the oil cylinder (8) and a rod cavity (81) are connected with the valve body (1) through a pipeline (9), and the pipeline (9) is communicated with the first communication hole (11).
6. The heavy load speed increasing valve according to any one of claims 1 to 5, wherein: the valve body (1) is of a rectangular structure, and a plurality of mounting holes (14) are formed in the end face of the valve body.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910013119.5A CN109458374B (en) | 2019-01-07 | 2019-01-07 | Heavy load speed increasing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910013119.5A CN109458374B (en) | 2019-01-07 | 2019-01-07 | Heavy load speed increasing valve |
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| CN109458374A CN109458374A (en) | 2019-03-12 |
| CN109458374B true CN109458374B (en) | 2023-09-22 |
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| CN201910013119.5A Active CN109458374B (en) | 2019-01-07 | 2019-01-07 | Heavy load speed increasing valve |
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| US5676169A (en) * | 1996-01-24 | 1997-10-14 | Power Team Division Of Spx Corporation | Counterbalance valve |
| JP2000283105A (en) * | 1999-03-31 | 2000-10-13 | Kobe Steel Ltd | Accelerating valve |
| CN204253484U (en) * | 2014-11-28 | 2015-04-08 | 周明嵩 | A kind of novel mass flow Bidirectional balanced valve |
| CN107339270A (en) * | 2017-09-05 | 2017-11-10 | 烟台艾迪精密机械股份有限公司 | A kind of hydraulic shear cylinder control system and hydraulic shear |
| CN207420997U (en) * | 2017-09-27 | 2018-05-29 | 鞍钢股份有限公司 | A kind of collecting main pressure regulating valve, which is died, powers off positioner |
| CN207879747U (en) * | 2017-12-30 | 2018-09-18 | 山东凯雷德工业设计有限公司 | It is a kind of to control the hydraulic valve bank and its system that snow is brushed, snow cave shovel lifts |
| CN209354455U (en) * | 2019-01-07 | 2019-09-06 | 油威力液压科技股份有限公司 | Heavy load speedup valve |
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2019
- 2019-01-07 CN CN201910013119.5A patent/CN109458374B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5676169A (en) * | 1996-01-24 | 1997-10-14 | Power Team Division Of Spx Corporation | Counterbalance valve |
| JP2000283105A (en) * | 1999-03-31 | 2000-10-13 | Kobe Steel Ltd | Accelerating valve |
| CN204253484U (en) * | 2014-11-28 | 2015-04-08 | 周明嵩 | A kind of novel mass flow Bidirectional balanced valve |
| CN107339270A (en) * | 2017-09-05 | 2017-11-10 | 烟台艾迪精密机械股份有限公司 | A kind of hydraulic shear cylinder control system and hydraulic shear |
| CN207420997U (en) * | 2017-09-27 | 2018-05-29 | 鞍钢股份有限公司 | A kind of collecting main pressure regulating valve, which is died, powers off positioner |
| CN207879747U (en) * | 2017-12-30 | 2018-09-18 | 山东凯雷德工业设计有限公司 | It is a kind of to control the hydraulic valve bank and its system that snow is brushed, snow cave shovel lifts |
| CN209354455U (en) * | 2019-01-07 | 2019-09-06 | 油威力液压科技股份有限公司 | Heavy load speedup valve |
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|---|---|
| CN109458374A (en) | 2019-03-12 |
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