CN217129960U - High-precision double-pressure compensation constant flow device - Google Patents
High-precision double-pressure compensation constant flow device Download PDFInfo
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- CN217129960U CN217129960U CN202123297916.2U CN202123297916U CN217129960U CN 217129960 U CN217129960 U CN 217129960U CN 202123297916 U CN202123297916 U CN 202123297916U CN 217129960 U CN217129960 U CN 217129960U
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Abstract
The utility model relates to a high accuracy dual pressure compensation constant flow device. The technical problems that an existing speed regulating valve is greatly influenced by load change and system pressure change and low in control precision are mainly solved. The utility model adopts the technical proposal that: a high-precision double-pressure compensation constant flow device comprises a main valve body, a constant flow valve, a fixed-difference overflow valve and a plug; the constant flow valve is inserted into a constant flow valve jack arranged at the top of the main valve body, the constant-difference overflow valve is arranged in a constant-difference overflow valve jack arranged at the top of the main valve body, and the plug is arranged at an oil inlet and outlet control oil passage port arranged on the left side surface of the main valve body. The utility model has the advantages of design simple structure, with low costs, the load is sensitive, reduce the system energy consumption, the stable flow output of high accuracy, receive the load undulant less and the practicality is strong.
Description
Technical Field
The utility model belongs to the technical field of the hydrovalve, concretely relates to high accuracy dual pressure compensation constant flow device.
Background
At present, conventional speed regulating valves (or flow control valves) in the market are basically single-pressure compensation structures, the basic stability of flow can be guaranteed to a certain extent, but on the occasions where the flow is required to be stabilized at high precision, the traditional single-pressure compensation structures are greatly influenced by load change and system pressure change, and the flow variation range exceeds the high-precision requirement. Therefore, in combination with practical requirements, it is necessary to design and develop a dual-pressure compensation constant flow device to achieve high-precision flow output under the condition of load change.
Disclosure of Invention
The utility model aims at solving the technical problem that the change of load and the change of system pressure that exist of current governing valve influence greatly and control accuracy is low, providing a high accuracy dual pressure compensation constant flow device.
In order to solve the technical problem, the utility model discloses a technical scheme is:
a high-precision double-pressure compensation constant flow device comprises a main valve body, a constant flow valve, a fixed-difference overflow valve and a plug; the constant flow valve is inserted into a constant flow valve jack arranged at the top of the main valve body, the constant-difference overflow valve is arranged in a constant-difference overflow valve jack arranged at the top of the main valve body, and the plug is arranged at an oil inlet and outlet control oil passage port arranged on the left side surface of the main valve body.
Furthermore, the main valve body is a rectangular cube, and the top of the main valve body is provided with a constant flow valve jack and a fixed-difference overflow valve jack which are vertically parallel; the front of the main valve body is provided with a P1 oil inlet, a P2 oil outlet and a fixed-difference overflow T oil port; the left side surface of the main valve body is provided with a constant flow oil inlet control oil port and a constant flow oil outlet control oil port, a constant flow oil inlet control oil duct and a constant flow oil outlet control oil duct are arranged in the main valve body, the constant flow oil outlet control oil duct is positioned above the constant flow oil inlet control oil duct, one end of the constant flow oil outlet control oil duct is connected with the constant flow oil outlet control oil port, the constant flow oil outlet control oil duct penetrates through the middle upper part of a constant flow valve jack, the bottom of the other end of the constant flow oil outlet control oil duct is provided with a throttling hole, and the throttling hole is communicated with a control oil cavity arranged at the middle upper part of a constant difference overflow valve jack; one end of the constant flow oil inlet control oil duct is connected with a constant flow oil inlet control oil duct opening, the middle of the constant flow oil inlet control oil duct is communicated with a P1 oil inlet and an oil port arranged at the bottom of a constant flow valve jack in a crossed manner, the other end of the constant flow oil inlet control oil duct is communicated with an oil cavity arranged at the bottom of a fixed-difference overflow valve jack, a P2 oil outlet is communicated with an oil outlet cavity at the middle upper part of the constant flow valve jack, and a fixed-difference overflow T oil port is communicated with an overflow cavity arranged at the middle lower part of the fixed-difference overflow valve jack.
Furthermore, the constant flow valve consists of a valve body, a spring seat, a spring, a first pressure compensation valve core and a valve seat; the pressure compensating valve comprises a valve body, a spring seat, a first pressure compensating valve core, a spring seat, a second pressure compensating valve core, a spring seat and a valve seat, wherein the spring seat is installed at the top of a valve core hole formed in the valve body and is located above an oil outlet hole of the valve body, the first pressure compensating valve core is installed in the valve core hole formed in the valve body and is located below the oil outlet hole of the valve body, the spring is installed in the spring seat and a spring hole formed in the first pressure compensating valve core and is located between the spring seat and the first pressure compensating valve core, the valve seat is arranged at the bottom end of the valve body, and an oil inlet hole is formed in the bottom end of the valve seat.
Furthermore, the fixed-difference overflow valve comprises a fixed-difference valve seat, a pressure spring, a second pressure compensation valve core and a Glare ring, wherein one end of the pressure spring is arranged in a spring hole formed in the fixed-difference valve seat, the other end of the pressure spring is arranged in a spring hole formed in one end of the second pressure compensation valve core, and the Glare ring is arranged in a sealing groove formed in the outer surface of the second pressure compensation valve core.
The beneficial effects of the utility model are that:
the utility model discloses a cartridge formula pressure compensation constant flow valve and one have pressure compensation, the constant difference overflow valve that does not have the leakage, the constant flow ware of a high accuracy dual pressure compensation of constituteing carries out the full-automatic hydraulic control of dual pressure compensation to business turn over hydraulic fluid port pressure oil, has solved the technical problem that the change of receiving load and the change of system pressure that current governing valve exists influence greatly and control accuracy is low. Compared with the prior art, the utility model has the advantages of design simple structure, with low costs, the load is sensitive, reduce the system energy consumption, the stable flow output of high accuracy, receive the load undulant less and the practicality is strong.
Drawings
FIG. 1 is a hydraulic schematic diagram of the present invention;
fig. 2 is a schematic structural view of the constant flow device of the present invention;
fig. 3 is a cross-sectional view of the constant flow valve jack, the fixed difference overflow valve jack, the constant flow oil inlet control oil passage and the constant flow oil outlet control oil passage of the main valve body of the present invention;
FIG. 4 is a schematic structural view of the constant flow valve of the present invention;
FIG. 5 is a schematic structural view of the fixed-difference overflow valve of the present invention;
FIG. 6 is an assembly diagram of the constant flow valve, the fixed-difference overflow valve and the plug of the present invention;
in the figure: 1-a main valve body, 2-a constant flow valve, 3-a constant-difference overflow valve, 4-a plug, 5-a throttling hole, 6-P1 oil inlets, 7-a constant flow valve jack, 8-a constant flow oil inlet control oil passage port, 9-a constant flow oil outlet control oil passage port, 10-a constant-difference overflow valve jack, 11-P2 oil outlets, 12-a constant-difference overflow T oil port, 13-a constant flow oil inlet control oil passage, 14-a constant flow oil outlet control oil passage and 15-an overflow cavity; 2-1-a valve body, 2-2-a spring seat, 2-3-a spring, 2-4-a first pressure compensation valve core, 2-5-a valve seat, 2-6-an oil inlet hole and 2-7-an oil outlet hole of the valve body; 3-1-fixed difference valve seat, 3-2-pressure spring, 3-3-second pressure compensation valve core and 3-4-Glare ring.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples.
As shown in fig. 2 to 6, the high-precision dual-pressure compensation constant flow device in the present embodiment includes a main valve body 1, a constant flow valve 2, a fixed-difference overflow valve 3 and a plug 4; the constant flow valve 2 is inserted into a constant flow valve jack 7 arranged at the top of the main valve body 1, the constant difference overflow valve 3 is arranged in a constant difference overflow valve jack 10 arranged at the top of the main valve body 1, and the plug 4 is arranged at an oil inlet and outlet control oil passage port arranged on the left side surface of the main valve body 1.
The main valve body 1 is a rectangular cube, and the top of the main valve body 1 is provided with a constant flow valve jack 7 and a constant-difference overflow valve jack 10 which are vertically parallel; the front of the main valve body 1 is provided with a P1 oil inlet 6, a P2 oil outlet 11 and a fixed-difference overflow T oil port 12; the left side surface of the main valve body 1 is provided with a constant flow oil inlet control oil port 8 and a constant flow oil outlet control oil port 9, a constant flow oil inlet control oil duct 13 and a constant flow oil outlet control oil duct 14 are arranged in the main valve body 1, the constant flow oil outlet control oil duct 14 is positioned above the constant flow oil inlet control oil duct 13, one end of the constant flow oil outlet control oil duct 14 is connected with the constant flow oil outlet control oil port 9, the constant flow oil outlet control oil duct 14 penetrates through the middle upper part of a constant flow valve jack 7, the bottom of the other end of the constant flow oil outlet control oil duct is provided with a throttling hole 5, and the throttling hole 5 is communicated with a control oil cavity arranged at the middle upper part of a constant difference overflow valve jack 10; one end of the constant flow oil inlet control oil duct 13 is connected with a constant flow oil inlet control oil duct port 8, the middle of the constant flow oil inlet control oil duct 13 is communicated with the P1 oil inlet 6 and the oil port III arranged at the bottom of the constant flow valve jack 7 in a crossed manner, the other end of the constant flow oil inlet control oil duct 13 is communicated with an oil cavity arranged at the bottom of the fixed-difference overflow valve jack 10, the P2 oil outlet 11 is communicated with an oil outlet cavity arranged at the middle upper part of the constant flow valve jack 7, and the fixed-difference overflow T oil port 12 is communicated with an overflow cavity 15 arranged at the middle lower part of the fixed-difference overflow valve jack 10.
The constant flow valve 2 comprises a valve body 2-1, a spring seat 2-2, a spring 2-3, a first pressure compensation valve core 2-4, a valve seat 2-5 and the like; the pressure compensating valve comprises a valve body 2-1, a spring seat 2-2, a first pressure compensating valve core 2-4, a spring seat 2-5, a valve seat 2-5 and an oil inlet 2-6, wherein the valve seat 2-2 is arranged at the top of a valve core hole arranged in the valve body 2-1 and is positioned above an oil outlet 2-7 of the valve body, the first pressure compensating valve core 2-4 is arranged in the valve core hole arranged in the valve body 2-1 and is positioned below the oil outlet 2-7 of the valve body, the spring 2-3 is arranged in a spring hole arranged in the spring seat 2-2 and the first pressure compensating valve core 2-4 and is positioned between the spring seat 2-2 and the first pressure compensating valve core 2-4, the valve seat 2-5 is arranged at the bottom end of the valve body 2-1, and the oil inlet 2-6 is arranged at the bottom end of the valve seat 2-5.
The constant-difference overflow valve 3 comprises a constant-difference valve seat 3-1, a pressure spring 3-2, a second pressure compensation valve core 3-3, a Glare ring 3-4 and the like, wherein one end of the pressure spring 3-2 is arranged in a spring hole formed in the constant-difference valve seat 3-1, the other end of the pressure spring 3-2 is arranged in a spring hole formed in one end of the second pressure compensation valve core 3-3, and the Glare ring 3-4 is arranged in a sealing groove formed in the outer surface of the second pressure compensation valve core 3-3.
The utility model discloses a working process is:
in the working process of the high-precision double-pressure compensation constant flow device in the embodiment, the system supplies oil, oil is fed from a P1 oil inlet 6 in front of the main valve body 1, and the middle part of a constant flow oil feeding control oil duct 13 of the main valve body 1 is divided into two paths; one path of oil flows through an oil port arranged at the bottom of the constant flow valve jack 7 and an oil inlet 2-6 of the valve seat 2-5 to reach a1 cavity at the lower end a of the first pressure compensation valve core 2-4, and continues to flow through a small hole in the middle of the bottom of the first pressure compensation valve core 2-4 to reach an a2 cavity at the upper end a of the first pressure compensation valve core 2-4, and the oil in the a1 cavity at the lower end of the first pressure compensation valve core 2-4 and the oil in the a2 cavity at the upper end form a pressure constant difference value, and the first pressure compensation valve core 2-4 moves up and down along with the change of system load, so that the size of the oil outlet 2-7 of the valve body of the constant flow valve 2 is automatically adjusted, and the flow stability of the oil outlet 2-7 of the valve body of the constant flow valve 2 is ensured; the other path of oil flows through the constant flow oil inlet control oil passage 13 to reach a cavity b1 at the lower end of a second pressure compensation valve core 3-3 of the constant difference overflow valve 3; stable flow oil flows out of the valve body oil outlet 2-7 of the constant flow valve 2, and the stable flow oil is divided into two paths in an oil outlet cavity arranged at the middle upper part of the constant flow valve jack 7; one path of oil provides a stable system flow through a P2 oil outlet of the constant flow valve 2; the other path of oil flows through the constant flow oil outlet control oil passage 14 and the throttling hole 5 to reach an upper end b2 cavity of a second pressure compensation valve core 3-3 of the constant-difference overflow valve 3, a pressure constant difference value is established between the oil in an upper end b2 cavity of the second pressure compensation valve core 3-3 and the oil in a lower end b1 cavity, the second pressure compensation valve core 3-3 moves up and down along with the change of the system load, the constant-difference overflow is automatically controlled, and the stability of the oil outlet flow of a P2 oil outlet of the constant flow valve 2 is further ensured; b2 chamber constant difference overflow oil flows into the front constant difference overflow T oil port 12 from the overflow chamber arranged at the middle lower part of the constant difference overflow jack 10 in the main valve body 1 and returns to the system oil tank; in order to prevent oil at the upper end of the second pressure compensation valve core 3-3 from leaking to the middle lower part of the valve body 1, an overflow cavity 15 is arranged, and the oil flows into the front fixed-difference overflow T oil port 12 and returns to the system oil tank, a Glare ring 3-4 is arranged between the upper end of the second pressure compensation valve core 3-3 and the middle lower overflow cavity 15 of the fixed-difference overflow jack 10 for sealing, so that no leakage of the second pressure compensation valve core 3-3 is realized, and the stability of the oil outlet flow of the P2 oil outlet is further ensured.
Claims (4)
1. The utility model provides a high accuracy dual pressure compensation constant flow device which characterized in that: comprises a main valve body (1), a constant flow valve (2), a fixed-difference overflow valve (3) and a plug (4); the constant flow valve (2) is inserted into a constant flow valve jack (7) arranged at the top of the main valve body (1), the constant-difference overflow valve (3) is arranged in a constant-difference overflow valve jack (10) arranged at the top of the main valve body (1), and the plug (4) is arranged at an oil inlet and outlet control oil passage port arranged on the left side surface of the main valve body (1).
2. A high precision dual pressure compensated constant flow device according to claim 1, wherein: the main valve body (1) is a rectangular cube, and the top of the main valve body (1) is provided with a constant flow valve jack (7) and a constant-difference overflow valve jack (10) which are vertically parallel; the front of the main valve body (1) is provided with a P1 oil inlet (6), a P2 oil outlet (11) and a fixed-difference overflow T oil port (12); the left side surface of the main valve body (1) is provided with a constant flow oil inlet control oil port (8) and a constant flow oil outlet control oil port (9), a constant flow oil inlet control oil duct (13) and a constant flow oil outlet control oil duct (14) are arranged in the main valve body (1), the constant flow oil outlet control oil duct (14) is positioned above the constant flow oil inlet control oil duct (13), one end of the constant flow oil outlet control oil duct (14) is connected with the constant flow oil outlet control oil duct port (9), the constant flow oil outlet control oil duct (14) penetrates through the middle upper part of a constant flow valve jack (7), the bottom of the other end of the constant flow oil outlet control oil duct is provided with a throttling hole (5), and the throttling hole (5) is communicated with a control oil cavity arranged at the middle upper part of a constant difference overflow valve jack (10); one end of the constant-flow oil inlet control oil duct (13) is connected with a constant-flow oil inlet control oil duct port (8), the middle of the constant-flow oil inlet control oil duct (13) is communicated with a P1 oil inlet (6) and an oil port arranged at the bottom of a constant-flow valve jack (7) in a crossed manner, the other end of the constant-flow oil inlet control oil duct (13) is communicated with an oil cavity arranged at the bottom of a constant-difference overflow valve jack (10), an oil outlet (11) of P2 is communicated with an oil outlet cavity arranged at the middle upper part of the constant-flow valve jack (7), and a constant-difference overflow T oil port (12) is communicated with an overflow cavity (15) arranged at the middle lower part of the constant-difference overflow valve jack (10).
3. A high accuracy dual pressure compensated constant flow device, as defined in claim 1, wherein: the constant flow valve (2) consists of a valve body (2-1), a spring seat (2-2), a spring (2-3), a first pressure compensation valve core (2-4) and a valve seat (2-5); the pressure compensating valve comprises a valve body (2-1), a spring seat (2-2), a first pressure compensating valve core (2-4), a spring (2-3), a valve seat (2-5), an oil inlet hole (2-6), a valve core hole, a valve outlet hole (2-7), a first pressure compensating valve core (2-4), a spring seat (2-3), a spring outlet hole, a spring seat (2-2), a spring outlet hole, a spring seat (2-3), a spring seat (2-2), a spring outlet hole, a spring seat (2-4), a spring seat (2-5), a spring outlet hole and a valve seat (2-6).
4. A high precision dual pressure compensated constant flow device according to claim 1, wherein: the constant-difference overflow valve (3) is composed of a constant-difference valve seat (3-1), a pressure spring (3-2), a second pressure compensation valve core (3-3) and a Glare ring (3-4), one end of the pressure spring (3-2) is installed in a spring hole formed in the constant-difference valve seat (3-1), the other end of the pressure spring (3-2) is installed in a spring hole formed in one end of the second pressure compensation valve core (3-3), and the Glare ring (3-4) is installed in a sealing groove formed in the outer surface of the second pressure compensation valve core (3-3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123297916.2U CN217129960U (en) | 2021-12-27 | 2021-12-27 | High-precision double-pressure compensation constant flow device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123297916.2U CN217129960U (en) | 2021-12-27 | 2021-12-27 | High-precision double-pressure compensation constant flow device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217129960U true CN217129960U (en) | 2022-08-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123297916.2U Active CN217129960U (en) | 2021-12-27 | 2021-12-27 | High-precision double-pressure compensation constant flow device |
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| Country | Link |
|---|---|
| CN (1) | CN217129960U (en) |
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2021
- 2021-12-27 CN CN202123297916.2U patent/CN217129960U/en active Active
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