CN219119548U - Direct-acting proportional pressure reducing valve - Google Patents
Direct-acting proportional pressure reducing valve Download PDFInfo
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- CN219119548U CN219119548U CN202223409270.7U CN202223409270U CN219119548U CN 219119548 U CN219119548 U CN 219119548U CN 202223409270 U CN202223409270 U CN 202223409270U CN 219119548 U CN219119548 U CN 219119548U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Abstract
The utility model provides a direct-acting proportional pressure reducing valve which comprises a valve body, a valve sleeve, a valve core and a controller, wherein a P port, an A port and a T port are formed in the side wall of the valve body, a first pressure cavity and a second pressure cavity are formed in the valve sleeve, a pressure sensor is arranged on the valve body, a cavity is formed in the valve sleeve, a first check ring and a second check ring are arranged at two ends of the cavity, an oil return cavity is formed in one side, close to the second check ring, of the valve core, a through hole is formed in the second check ring, a proportional electromagnet and a return spring are arranged on the valve core, a blind hole is formed in the valve core, a feedback valve core is fixedly connected with the second check ring, an orifice is formed in the bottom of the blind hole, and the controller drives the proportional electromagnet to adjust the position of the valve core in the cavity according to comparison of an external command signal and a detection signal of the pressure sensor. The direct-acting proportional pressure reducing valve provided by the utility model has a simple and compact structure, is especially suitable for controlling the working state of a system in a small flow (less than 12L/min), and has high output pressure precision and good stability.
Description
Technical Field
The utility model relates to the technical field of hydraulic mechanical engineering, in particular to a direct-acting proportional pressure reducing valve.
Background
The proportional pressure reducing valve is a main element for controlling and stabilizing the working pressure of the system in the hydraulic control system, and the requirements on the functions and performances of the hydraulic control element are continuously improved along with the improvement of the automation degree of engineering mechanical equipment. The proportional pressure reducing valve is used for remotely adjusting the working pressure of the hydraulic system according to a proportion, so that the proportional pressure reducing valve is widely applied, the proportional pressure reducing valve in the prior art is mainly composed of a pilot control part and a main valve, the pilot control part of the proportional pressure reducing valve needs pilot control oil, and the pressure change of the pilot control part is used for driving the main valve core to work. Therefore, in a control system with small flow rate below 10L/min, because a part of control oil is lost to provide a pilot control part for working, the control accuracy and stability of a control valve using the pilot proportional pressure reducing valve can be influenced, and the control system is suitable for using a direct-acting proportional pressure reducing valve, and the direct-acting proportional pressure reducing valve in the market at present is open-loop control.
Disclosure of Invention
The technical problems to be solved by the utility model are as follows: in order to overcome the defects in the prior art, the utility model provides a direct-acting proportional pressure reducing valve.
The technical scheme adopted for solving the technical problems is as follows: the direct-acting proportional pressure reducing valve comprises a valve body, a valve sleeve, a valve core and a controller, wherein a P port, an A port and a T port are arranged on the side wall of the valve body, a first pressure cavity communicated with the P port and a second pressure cavity communicated with the A port are arranged on the valve sleeve, a detection hole for detecting the pressure of the second pressure cavity is arranged on the valve body, a pressure sensor is arranged at the detection hole, a cavity matched with the valve core is arranged in the valve sleeve, a first check ring and a second check ring for limiting the position of the valve core are respectively arranged at two ends of the cavity, an oil return cavity is arranged at one side of the valve core, close to the second check ring, a through hole for communicating the oil return cavity and the T port is arranged on the second check ring, a proportional electromagnet for driving the valve core to be close to the second check ring and a reset spring for driving the valve core to be far away from the second check ring are arranged on the valve core, the valve core is characterized in that a blind hole is formed in one end, close to the second check ring, of the valve core, a feedback valve core is connected in a sliding mode, one end, extending out of the blind hole, of the feedback valve core is fixedly connected with the second check ring, an orifice communicated with the second pressure cavity is formed in the bottom of the blind hole, the valve core is driven by the proportion electromagnet to adjust the opening between the second pressure cavity and the first pressure cavity and the opening between the second pressure cavity and the oil return cavity, when the opening between the second pressure cavity and the first pressure cavity is increased, the opening between the second pressure cavity and the oil return cavity is decreased, and the opening between the second pressure cavity and the oil return cavity is increased.
The controller adopts the control principle of a proportional electromagnetic valve in the prior art, and is irrelevant to a program. The controller controls the working current of the proportional electromagnet, and the larger the working current is, the larger the magnetic force generated by the coil of the proportional electromagnet is, so that the position of the valve core is adjusted. And the opening between the first pressure cavity and the second pressure cavity and the opening between the second pressure cavity and the oil return cavity are regulated by regulating the position of the valve core. And the pressure oil is introduced into the pressure reducing valve through the P port, in an initial state, the controller has no instruction signal, the proportional electromagnet has no working current at the moment, the valve core is completely retracted under the action of the return spring, the opening between the first pressure cavity and the second pressure cavity is zero at the moment, the second pressure cavity is communicated with the oil return cavity, the pressure of the second pressure cavity is equal to the pressure of the oil return cavity, and the default is zero. When a user inputs a command signal to the controller, the controller controls the working current of the proportional electromagnet, the proportional electromagnet generates magnetic force to push the valve core, when the first pressure cavity is communicated with the second pressure cavity, pressure is generated in the second pressure cavity, the pressure sensor detects the pressure in the second pressure cavity through the monitoring hole, the pressure sensor transmits a signal to the controller, the controller compares the detection signal of the pressure sensor with the input command signal in real time, and the working current of the proportional electromagnet is continuously adjusted through the controller. Because the orifice at the bottom of the blind hole is communicated with the second pressure cavity, when the opening between the first pressure cavity and the second pressure cavity is increased, the pressure in the blind hole is increased, the reaction force generated by the feedback valve core on the valve core is gradually increased, and when the valve core is stressed to enter a balanced state, the oil pressure output by the port A reaches the preset oil pressure, and the valve core stops at a working position, so that the pressure adjustment is realized.
Further, the output end of the proportional electromagnet is connected with a push rod, the push rod penetrates through the first check ring and is fixedly connected with the valve core, one end, far away from the valve core, of the push rod is provided with a limiting flange, the reset spring is sleeved on the push rod, one end of the reset spring is propped against the first check ring, and the other end of the reset spring is propped against the limiting flange.
Further, be equipped with the first sealing ring that is used for switching on or break off first pressure chamber and second pressure chamber on the case, still be equipped with the second sealing ring that is used for switching on or break off second pressure chamber and return oil chamber on the case, the one end that the orifice kept away from the blind hole is located between first sealing ring and the second sealing ring.
Further, the first retainer ring is in threaded connection with the valve body to fix the valve sleeve in the valve body.
Further, a plurality of sealing rings for preventing hydraulic oil leakage are arranged between the valve sleeve and the valve body.
The beneficial effects of the utility model are as follows: the direct-acting proportional pressure reducing valve provided by the utility model has a simple and compact structure, is especially suitable for controlling the working state of a system in a small flow (less than 12L/min), and has high output pressure precision and good stability.
Drawings
The utility model is further described below with reference to the drawings and examples.
FIG. 1 is a schematic view of a preferred embodiment of the present utility model;
FIG. 2 is a schematic structural view of a valve cartridge;
fig. 3 is a proportional pressure reducing valve control block diagram.
In the figure: 1. the valve comprises a valve body, 1-1, a P port, 1-2, an A port, 1-3, a T port, 1-4, a detection hole, 2, a valve sleeve, 3, a valve core, 3-1, a blind hole, 3-2, an orifice, 3-3, a first sealing ring, 3-4, a second sealing ring, 4, a controller, 5, a first pressure cavity, 6, a second pressure cavity, 7, a pressure sensor, 8, a first check ring, 9, a second check ring, 9-1, a through hole, 10, an oil return cavity, 11, a proportional electromagnet, 12, a return spring, 13, a feedback valve core, 14 and a push rod.
Detailed Description
The present utility model will now be described in detail with reference to the accompanying drawings. The figure is a simplified schematic diagram illustrating the basic structure of the utility model only by way of illustration, and therefore it shows only the constitution related to the utility model.
As shown in figures 1-3, the direct proportional pressure reducing valve comprises a valve body 1, a valve sleeve 2, a valve core 3 and a controller 4, wherein a P port 1-1, an A port 1-2 and a T port 1-3 are arranged on the side wall of the valve body 1, a first pressure cavity 5 communicated with the P port 1-1 and a second pressure cavity 6 communicated with the A port 1-2 are arranged on the valve sleeve 2, a detection hole 1-4 for detecting the pressure of the second pressure cavity 6 is arranged on the valve body 1, a pressure sensor 7 is arranged at the detection hole 1-4, a cavity matched with the valve core 3 is arranged in the valve sleeve 2, a first check ring 8 and a second check ring 9 for limiting the position of the valve core 3 are respectively arranged at two ends of the cavity, one side of the valve core 3 close to the second check ring 9 is provided with an oil return cavity 10, a proportional electromagnet 11 arranged on the second check ring 9 and used for communicating the oil return cavity 10 and the T port 1-3 and a second check ring 9 are arranged on the valve sleeve 3, a proportional electromagnet 11 and a return spring 3 arranged on the valve core 3 and a return spring 3 are arranged on the valve core 3 and are far away from the second check ring 3, when the second valve core 3 is far from the second valve cavity 3 and is far from the first end and far from the second valve cavity 3 and is connected with the first end 6 and the second end 6, the second end is fixedly connected with the first end 1 and the second end 6, the second end 6 of the valve core has a blind hole, and the second end is connected with the second end 1 through the second end 6, and the second end has a blind hole and a first end for regulating opening hole and a bore is connected with the second end hole, the opening degree between the second pressure cavity 6 and the oil return cavity 10 becomes smaller, and when the opening degree between the second pressure cavity 6 and the first pressure cavity 5 becomes smaller, the opening degree between the second pressure cavity 6 and the oil return cavity 10 becomes larger, and the controller 4 drives the proportional electromagnet 11 to adjust the position of the valve core 3 in the cavity according to comparison between an external command signal and a detection signal of the pressure sensor 7.
The output end of the proportional electromagnet 11 is connected with a push rod 14, the push rod 14 penetrates through the first check ring 8 to be fixedly connected with the valve core 3, one end, far away from the valve core 3, of the push rod 14 is provided with a limiting flange, the reset spring 12 is sleeved on the push rod 14, one end of the reset spring is propped on the first check ring 8, and the other end of the reset spring is propped on the limiting flange.
The valve core 3 is provided with a first sealing ring 3-3 for connecting or disconnecting the first pressure cavity 5 and the second pressure cavity 6, the valve core 3 is also provided with a second sealing ring 3-4 for connecting or disconnecting the second pressure cavity 6 and the oil return cavity 10, and one end of the throttle hole 3-2 far away from the blind hole 3-1 is arranged between the first sealing ring 3-3 and the second sealing ring 3-4.
The first retainer ring 8 is in threaded connection with the valve body 1 to fix the valve sleeve 2 in the valve body 1.
A plurality of sealing rings for preventing hydraulic oil from leaking are arranged between the valve sleeve 2 and the valve body 1.
The working process comprises the following steps:
initial state: the main pressure of the hydraulic control system enters the first pressure cavity 5 from the P port 1-1, at the moment, the controller 4 has no external command signal, the proportional electromagnet 11 has no working current, the push rod 14 drives the valve core 3 to be in a complete retraction state under the action of the return spring 12, at the moment, the first pressure cavity 5 is not communicated with the second pressure cavity 6, the second pressure cavity 6 is communicated with the oil return cavity 10, the output pressure of the port 1-2 of the second pressure cavity 6A is equal to the pressure of the port 1-3 of the oil return cavity 10T, and the pressure is defaulted to zero.
Working principle: when a command signal is input to the controller 4, the signal is processed and amplified by the controller 4, a certain working current is input to the proportional electromagnet 11, at the moment, the output end of the proportional electromagnet 11 pushes the push rod 14 to overcome the elastic force of the return spring 12, and pushes the valve core 3 to move towards the direction close to the second check ring 9, so that the first pressure cavity 5 and the second pressure cavity 6 are gradually communicated, the second pressure cavity 6 and the oil return cavity 10 are gradually closed, and at the moment, the pressure of the second pressure cavity 6 is gradually increased. Because the bottom of the blind hole 3-1 is communicated with the second pressure cavity 6 through the throttling hole 3-2, the pressure in the blind hole 3-1 is increased, the acting force of the feedback valve core 13 on the valve core 3 is gradually increased until the valve core 3 is stressed to enter a balanced state and is stopped at a working position, and the pressure adjustment is realized.
When a command signal is input to the controller 4, the pressure of the second pressure chamber 6 enters an adjustment state. The pressure of the second pressure cavity 6 is detected by the pressure sensor 7 of the detection hole 1-4 in real time, a pressure signal is converted into an electric signal and is continuously transmitted to the controller 4, the controller 4 compares and calculates a feedback electric signal of the pressure sensor 7 with an input command signal, and the working current of the proportional electromagnet 11 is continuously adjusted, so that the working position of the valve core 3 is adjusted, the output of the proportional pressure reducing valve corresponds to the command signal, and the rapid and precise pressure adjustment of the proportional pressure reducing valve is realized.
Directions and references (e.g., up, down, left, right, etc.) in this utility model may be used only to aid in the description of features in the drawings. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the claimed subject matter is defined only by the appended claims and equivalents thereof.
While the foregoing is directed to the preferred embodiment of the present utility model, other and further embodiments of the utility model may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. The technical scope of the present utility model is not limited to the description, but must be determined according to the scope of claims.
Claims (5)
1. A direct-acting proportional pressure reducing valve is characterized in that: comprises a valve body (1), a valve sleeve (2), a valve core (3) and a controller (4), wherein a P port (1-1), an A port (1-2) and a T port (1-3) are arranged on the side wall of the valve body (1), a first pressure cavity (5) communicated with the P port (1-1) and a second pressure cavity (6) communicated with the A port (1-2) are arranged on the valve sleeve (2), a detection hole (1-4) for detecting the pressure of the second pressure cavity (6) is arranged on the valve body (1), a pressure sensor (7) is arranged at the detection hole (1-4), a cavity matched with the valve core (3) is arranged in the valve sleeve (2), a first check ring (8) and a second check ring (9) for limiting the position of the valve core (3) are respectively arranged at two ends of the cavity, a return oil cavity (10) is arranged on one side, close to the second check ring (9), a through hole (9) for communicating the return oil cavity (10) and the T port (1-3) is arranged on the valve body (1), a return spring (3) is arranged on the valve core (3) close to the second check ring (3), the valve core (3) is provided with a blind hole (3-1) at one end close to the second check ring (9), a feedback valve core (13) is connected in the blind hole (3-1), one end of the feedback valve core (13) extending out of the blind hole (3-1) is fixedly connected with the second check ring (9), an orifice (3-2) communicated with the second pressure cavity (6) is arranged at the bottom of the blind hole (3-1), the valve core (3) is driven by a proportional electromagnet (11) to adjust the opening between the second pressure cavity (6) and the first pressure cavity (5) and adjust the opening between the second pressure cavity (6) and the return oil cavity (10), when the opening between the second pressure cavity (6) and the return oil cavity (10) is increased, the opening between the second pressure cavity (6) and the first pressure cavity (5) is decreased, the opening between the second pressure cavity (6) and the return oil cavity (10) is increased, and the controller (4) is driven by an external command signal (7) to adjust the valve core position according to the command signal (3).
2. A direct-acting proportional pressure reducing valve as set forth in claim 1, wherein: the output end of the proportional electromagnet (11) is connected with a push rod (14), the push rod (14) penetrates through the first check ring (8) and is fixedly connected with the valve core (3), one end, far away from the valve core (3), of the push rod (14) is provided with a limiting flange, the reset spring (12) is sleeved on the push rod (14), one end of the reset spring is propped against the first check ring (8), and the other end of the reset spring is propped against the limiting flange.
3. A direct-acting proportional pressure reducing valve as set forth in claim 1, wherein: the valve core (3) is provided with a first sealing ring (3-3) for connecting or disconnecting the first pressure cavity (5) and the second pressure cavity (6), the valve core (3) is also provided with a second sealing ring (3-4) for connecting or disconnecting the second pressure cavity (6) and the oil return cavity (10), and one end, far away from the blind hole (3-1), of the orifice (3-2) is arranged between the first sealing ring (3-3) and the second sealing ring (3-4).
4. A direct-acting proportional pressure reducing valve as set forth in claim 1, wherein: the first check ring (8) is in threaded connection with the valve body (1) to fix the valve sleeve (2) in the valve body (1).
5. A direct-acting proportional pressure reducing valve as set forth in claim 1, wherein: a plurality of sealing rings for preventing hydraulic oil leakage are arranged between the valve sleeve (2) and the valve body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223409270.7U CN219119548U (en) | 2022-12-16 | 2022-12-16 | Direct-acting proportional pressure reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223409270.7U CN219119548U (en) | 2022-12-16 | 2022-12-16 | Direct-acting proportional pressure reducing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219119548U true CN219119548U (en) | 2023-06-02 |
Family
ID=86528340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223409270.7U Active CN219119548U (en) | 2022-12-16 | 2022-12-16 | Direct-acting proportional pressure reducing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219119548U (en) |
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2022
- 2022-12-16 CN CN202223409270.7U patent/CN219119548U/en active Active
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