CN211737617U - Direct-acting pressure positive feedback two-way proportional pressure reducing valve - Google Patents
Direct-acting pressure positive feedback two-way proportional pressure reducing valve Download PDFInfo
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- CN211737617U CN211737617U CN202020078982.7U CN202020078982U CN211737617U CN 211737617 U CN211737617 U CN 211737617U CN 202020078982 U CN202020078982 U CN 202020078982U CN 211737617 U CN211737617 U CN 211737617U
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Abstract
A direct-acting pressure positive feedback two-way proportional pressure reducing valve comprises a proportional electromagnet, an electromagnet push rod, a pressure regulating spring, a valve body and a valve core; the electromagnet push rod is connected with the valve body and can slide on the valve body along the push rod axis, one end of the electromagnet push rod is connected with the pressure regulating spring, and the other end of the electromagnet push rod extends out of the shell and is connected with the proportional electromagnet; the valve core is tightly matched with the valve body and can slide in the valve body along the axis, and the shoulder of the valve core is matched with the oil outlet on the valve body to control the size of the throttling port flowing out of the valve body; thereby controlling the pressure value of the oil flowing out of the valve body; the pressure of the oil outlet is in linear relation with the input current of the proportional electromagnet.
Description
Technical Field
The utility model belongs to the technical field of fluid drive and control, a direct action type pressure positive feedback bi-pass proportion relief pressure valve is related to.
Background
The pressure reducing valve is a device for automatically reducing the working pressure of a pipeline in a hydraulic system, and does not work when the water pressure or the air pressure is normal; when the pressure in the pipeline is abnormal, the sensitive element in the valve starts to play a role, so that the effect of changing the size of the pressure value is achieved, and the working pressure in the pipeline reaches a normal value; the pressure reducing valve is widely used in high-rise buildings, urban water supply pipe networks, mines and other hydraulic and pneumatic occasions to ensure that each water point in a water supply system obtains proper service water pressure and flow.
The existing two-way pressure reducing valve adopts a structural form of pressure negative feedback, namely when the outlet pressure of the pressure reducing valve is increased, a throttling port of the valve can be reduced under the action of the pressure negative feedback; thereby reducing the flow through the valve port and the response speed of the valve is lower during valve movement.
Therefore, designing a direct-acting pressure positive feedback two-way proportional pressure reducing valve is especially important for improving the response speed of the pressure reducing valve and the adjustment sensitivity of a hydraulic system.
Disclosure of Invention
The utility model provides a direct action type pressure positive feedback two-way proportional pressure reducing valve, the device can show the response speed who improves the valve.
The utility model adopts the following technical scheme:
a direct-acting pressure positive feedback two-way proportional pressure reducing valve comprises a proportional electromagnet 1, an electromagnet push rod 2, a pressure regulating spring 3, a valve body 4 and a valve core 5; the electromagnet push rod 2 is connected with the valve body 4 and can slide along the axial direction of the valve core 5; one end of the electromagnet push rod 2 is connected with the pressure regulating spring 3, and the other end of the electromagnet push rod 2 extends out of the shell and is connected with the proportional electromagnet 1.
The valve core 5 is in a step-shaped five-section outer cylinder form and is arranged in the valve body 4, and the contact surface of the valve core 5 and the valve body 4 is tightly matched; the upper end surface of the valve core 5 and the inner cavity of the valve body 4 form an upper oil cavity A1, and the lower end surface of the valve core 5 and the inner cavity of the valve body 4 form a lower oil cavity A2; an oil inlet P, a throttling port B and an upper oil return port C are formed in the side face of the valve body 4, and a lower oil return port D is formed in the lower end face of the valve body 4; the throttle orifice B, the upper oil return port C and the lower oil return port D are communicated with the oil outlet A through pipelines; the valve body 5 is linearly slidable in the valve body 4, and the linear sliding of the valve body 5 enables the intermediate land of the valve body 5 to adjust the opening degree of the orifice B.
The pressure at the oil outlet A is led into an oil cavity at the upper end A1 of the valve core 5 as positive feedback, and is led into an oil cavity at the lower end A2 of the valve core 5 as negative feedback.
The utility model has the advantages that: a direct-acting pressure positive feedback two-way proportional pressure reducing valve is characterized in that pressure oil of an oil outlet A externally connected with a valve body 4 is led into an upper oil cavity A1 to serve as pressure positive feedback, and the response speed of the valve can be remarkably improved in the working process of the valve.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 1, a direct-acting pressure positive feedback two-way proportional pressure reducing valve includes a proportional electromagnet 1, an electromagnet push rod 2, a pressure regulating spring 3, a valve body 4 and a valve core 5; the electromagnet push rod 2 is connected with the valve body 4 and can slide along the axial direction of the valve core 5; one end of the electromagnet push rod 2 is connected with the pressure regulating spring 3, and the other end of the electromagnet push rod 2 extends out of the shell and is connected with the proportional electromagnet 1; the valve core 5 is in a step-shaped five-section outer cylinder form and is arranged in the valve body 4, the contact surface of the valve core 5 and the valve body 4 is tightly matched, and the upper end of the valve core 5 is connected with the pressure regulating spring 3; an oil inlet P, a throttling port B and an upper oil return port C are formed in the side face of the valve body 4, and a lower oil return port D is formed in the lower end face of the valve body 4; the upper oil return port C, the lower oil return port D and the throttle B are communicated with the oil outlet A through pipelines; the valve body 5 is linearly slidable in the valve body 4, and the linear sliding of the valve body 5 enables the intermediate land of the valve body 5 to adjust the opening degree of the orifice B.
The utility model discloses a working process does:
high-pressure oil enters the interior of the valve body 4 from the oil inlet P and flows out of the valve body 4 through the throttle B to the oil outlet A to enter an execution element, when the high-pressure oil flows out of the valve body 4 from the throttle B, a pipeline connected with the throttle B and the oil inlet A enters the upper oil cavity A1 together with the upper oil return port C, and enters the lower oil cavity A2 through the lower oil return port D; the valve core 5 is in a stepped five-section outer cylinder form, the upper and lower stress surfaces of the valve core 5 are different and generate pressure difference, when the hydraulic pressure applied to the valve core 5 is greater than the set value of the pressure regulating spring 3, the valve core 5 moves upwards, the flow area at the throttling port B is reduced, and therefore the pressure at the oil outlet A is ensured to be the set pressure value of the pressure regulating spring 3; the pressure set value of the pressure regulating spring 3 is provided by the electromagnet push rod 2 pushed by the proportional electromagnet 1, and the set value of the pressure regulating spring 3 is adjusted in real time by adjusting the current value of the proportional electromagnet 1 in the working process, so that the pressure value at the oil outlet A is adjusted.
Claims (1)
1. A direct-acting pressure positive feedback two-way proportional pressure reducing valve is characterized in that: comprises a proportional electromagnet (1), an electromagnet push rod (2), a pressure regulating spring (3), a valve body (4) and a valve core (5); the electromagnet push rod (2) is connected with the valve body (4), and the valve body (4) can slide along the axis of the electromagnet push rod (2); one end of the electromagnet push rod (2) is connected with the pressure regulating spring (3), and the other end of the electromagnet push rod (2) extends out of the shell and is connected with the proportional electromagnet (1);
the valve core (5) is in a stepped five-section outer cylinder form, is packaged in the valve body (4) and is tightly matched with the valve body (4); the upper end surface of the valve core (5) and the inner cavity of the valve body (4) form an upper oil cavity A1, and the lower end surface of the valve core (5) and the inner cavity of the valve body (4) form a lower oil cavity A2; an oil inlet P, a throttling port B and an upper oil return port C are formed in the side face of the valve body (4), and a lower oil return port D is formed in the lower end face of the valve body (4); the throttle orifice B, the upper oil return port C and the lower oil return port D are communicated with the oil outlet A through pipelines; the valve core (5) can slide linearly in the valve body (4), and the linear sliding of the valve core (5) can enable the middle shoulder of the valve core (5) to adjust the opening degree of the throttle orifice B;
introducing the pressure at the oil outlet A into an oil cavity A1 at the upper end of the valve core (5) as positive feedback, and introducing the pressure into an oil cavity A2 at the lower end of the valve core (5) as negative feedback;
the upper and lower stress surfaces of the valve core (5) are different and generate pressure difference, when the hydraulic pressure applied to the valve core (5) is greater than the set value of the pressure regulating spring (3), the valve core (5) moves upwards, the flow area at the throttling port B is reduced, and therefore the pressure at the oil outlet A is ensured to be the set pressure value of the pressure regulating spring (3); the pressure set value of the pressure regulating spring (3) is provided by the electromagnet push rod (2) pushed by the proportional electromagnet (1), and the set value of the pressure regulating spring (3) is adjusted in real time by adjusting the current value of the proportional electromagnet (1) in the working process, so that the pressure value at the oil outlet A is adjusted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020078982.7U CN211737617U (en) | 2020-01-15 | 2020-01-15 | Direct-acting pressure positive feedback two-way proportional pressure reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020078982.7U CN211737617U (en) | 2020-01-15 | 2020-01-15 | Direct-acting pressure positive feedback two-way proportional pressure reducing valve |
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| CN211737617U true CN211737617U (en) | 2020-10-23 |
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| CN202020078982.7U Active CN211737617U (en) | 2020-01-15 | 2020-01-15 | Direct-acting pressure positive feedback two-way proportional pressure reducing valve |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110953210A (en) * | 2020-01-15 | 2020-04-03 | 陕西理工大学 | Direct-acting pressure positive feedback two-way proportional pressure reducing valve |
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2020
- 2020-01-15 CN CN202020078982.7U patent/CN211737617U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110953210A (en) * | 2020-01-15 | 2020-04-03 | 陕西理工大学 | Direct-acting pressure positive feedback two-way proportional pressure reducing valve |
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