CN219198150U - Positive feedback pressure control valve - Google Patents
Positive feedback pressure control valve Download PDFInfo
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- CN219198150U CN219198150U CN202320647315.XU CN202320647315U CN219198150U CN 219198150 U CN219198150 U CN 219198150U CN 202320647315 U CN202320647315 U CN 202320647315U CN 219198150 U CN219198150 U CN 219198150U
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Abstract
The present utility model relates to a positive feedback pressure control valve. The purpose is to solve the technical problems that the prior positive feedback control device needs more elements and has high electric control and use and maintenance costs. The technical scheme of the utility model is as follows: the control valve comprises a pressure spring, a long bolt, a nut, a lower valve body, a middle valve block, a valve rod, a valve pipe, a valve core, an upper valve body, a spring limiting block and a fixing nut, wherein the lower valve body is connected with the bottom surface of a boss of the middle valve block, the lower end of the valve pipe is connected with the top surface of the boss of the middle valve block, the upper end of the valve pipe is connected with the lower end of the upper valve body, the lower valve body, the middle valve block, the valve pipe and the upper valve body are connected into a whole through the long bolt and the nut, the lower end of the valve rod is sealed with a liquid outlet of the lower valve body firmly, the valve core is arranged on the upper part of the valve rod, the lower end of the pressure spring is arranged on the upper end surface of the valve core, the spring limiting block is arranged at the upper end of a spring hole of the upper valve body, and the lower end of the spring limiting block is contacted with the upper end of the pressure spring.
Description
Technical Field
The utility model belongs to the technical field of hydraulic control valves, and particularly relates to a positive feedback pressure control valve.
Background
At present, when there is a positive feedback control relationship between two pipelines and there is an automatic control requirement, if the pipeline pressure A is greater than a certain value, the pipeline B is required to be opened, and the common practice is to monitor the pipeline A through a PLC, when the pipeline A is monitored to be greater than a certain value, the PLC controls the valve installed on the pipeline B to be opened so as to communicate with the pipeline B, and when the pipeline A is monitored to be less than a certain value, the PLC controls the valve installed on the pipeline B to be closed so as to close the pipeline B. Such implementations, while accurate, require a large number of components and must be electronically controlled, with high maintenance costs.
Disclosure of Invention
The utility model aims to solve the technical problems that the prior positive feedback control device needs more elements and has high electric control and use and maintenance costs, and provides a positive feedback pressure control valve.
In order to solve the technical problems, the utility model adopts the following technical scheme:
a positive feedback pressure control valve comprising a pressure spring, a long bolt and a nut, wherein: the valve is characterized by further comprising a lower valve body, a middle valve block, a valve rod, a valve tube, a valve core, an upper valve body, a spring limiting block and a fixing nut, wherein the upper end of the lower valve body is connected with the bottom surface of a boss arranged in the middle of the middle valve block, the lower end of the middle valve block is inserted into a liquid cavity arranged in the lower valve body, the lower end of the valve tube is connected with the top surface of the boss arranged in the middle of the middle valve block, the upper end of the middle valve block is inserted into the lower part in the valve tube, the upper end of the valve tube is connected with the lower end of the upper valve body, the lower valve body, the middle valve block, the valve tube and the upper valve body are connected into a whole through a long bolt and a nut, the lower end of the valve rod penetrates through a valve rod hole arranged in the middle valve block and is firmly sealed with a liquid outlet arranged in the lower valve body, the valve core is arranged at the middle upper part of the valve rod and is fixed on the valve rod through the fixing nut, the valve core is positioned in a working cavity formed between the valve tube, the lower end of the pressure spring is arranged on the upper end surface of the valve core and the upper end of the middle valve block, the upper end of the pressure spring is positioned in a spring hole arranged in the upper valve body, the upper end of the valve block is connected with the upper end of the upper valve body, which is connected with the upper end of the upper valve body, and the upper end of the upper valve body is fixed with the lower end of the upper valve body.
Further, the lower valve body is provided with a liquid cavity, a liquid inlet and a liquid outlet, the liquid outlet is arranged in the lower valve body and is positioned in the center of the bottom surface of the liquid cavity, and the liquid inlet is arranged on the side surface of the lower valve body and is communicated with the liquid cavity.
Further, a control port is arranged on the side wall of the valve tube, and the control port is communicated with a working cavity between the middle valve block and the valve core.
The beneficial effects of the utility model are as follows:
according to the technical scheme, the pressure spring is arranged on the valve core, the pressure spring is adjusted to a value of a certain pressure at the beginning of use, when the pressure of the control port is smaller than the certain value, the valve core is subjected to downward pressure of the pressure spring, the valve rod is driven to move downwards to the liquid outlet of the lower valve body, and a fluid channel between the liquid inlet and the liquid outlet is blocked, so that a controlled pipeline is closed; when the pressure of the control port is larger than the fixed value, the valve core is subjected to downward force of the upward pressure larger than the pressure spring, so that the valve core drives the valve rod to move upwards until the valve rod opens the liquid outlet, the liquid inlet and the liquid outlet of the lower valve body are opened, and the valve core is communicated by the control pipeline; the positive feedback control device has the advantages that the positive feedback control relation between two pipelines is realized, the automatic control function is realized, and the technical problems that the existing positive feedback control device needs more elements and has high electric control and use and maintenance costs are solved. Compared with the background art, the utility model has the advantages of simple structure, no need of electric power control and low use and maintenance cost.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
in the figure: the valve comprises a lower valve body, a middle valve block 2, a valve rod 3, a valve tube 4, a valve core 5, an upper valve body 6, a pressure spring 7, a spring limiting block 8, a liquid outlet 9, a liquid inlet 10, a control port 11, a working cavity 12, a fixing nut 13, a nut 14 and a long bolt 15.
Detailed Description
The utility model is described in detail below with reference to the drawings and examples.
As shown in fig. 1, a positive feedback pressure control valve in the present embodiment includes a pressure spring 7, a long bolt 15, and a nut 14, wherein: the valve further comprises a lower valve body 1, a middle valve block 2, a valve rod 3, a valve tube 4, a valve core 5, an upper valve body 6, a spring limiting block 8 and a fixing nut 13, wherein the upper end of the lower valve body 1 is connected with the bottom surface of a boss arranged in the middle of the middle valve block 2, the lower end of the middle valve block 2 is inserted into a liquid cavity arranged in the lower valve body 1, the lower end of the valve tube 4 is connected with the top surface of the boss arranged in the middle of the middle valve block 2 and enables the upper end of the middle valve block 2 to be inserted into the lower part in the valve tube 4, the upper end of the valve tube 4 is connected with the lower end of the upper valve body 6, the lower valve body 1, the middle valve block 2, the valve tube 4 and the upper valve body 6 are connected into a whole through a long bolt 15 and a nut 14, the lower end of the valve rod 3 passes through a valve rod hole arranged in the middle valve block 2 and a liquid outlet arranged in the lower valve body 1, the valve rod 3 can slide in the valve rod hole arranged in the middle valve block 2, the valve core 5 is arranged at the middle upper part of the valve rod 3 and fixed on the valve rod 3 through the fixing nut 13, the valve core 5 is arranged at the upper end of the valve body 5 and is positioned at the upper end of the middle of the valve body 4 and the middle valve body 2 and is in the upper end of the valve body 6 and is in the upper end of the valve body 6 and the upper end of the upper valve body 7 is in the threaded connection with the upper end 8. A sealing ring is arranged between the lower valve body 1 and the lower end of the middle valve block 2, a sealing ring is arranged between the valve pipe 4 and the upper end of the middle valve block 2, a sealing ring is arranged between a valve rod hole of the middle valve block 2 and the valve rod 3, and a sealing ring is arranged between the valve core 5 and the valve pipe 4.
Further, the lower valve body 1 is provided with a liquid cavity, a liquid inlet 10 and a liquid outlet 9, the liquid outlet 9 is arranged in the lower valve body 1 and is positioned in the center of the bottom surface of the liquid cavity, and the liquid inlet 10 is arranged on the side surface of the lower valve body 1 and is communicated with the liquid cavity.
Further, a control port 11 is arranged on the side wall of the valve tube 4, and the control port 11 is communicated with a working cavity 12 between the middle valve block 2 and the valve core 5.
The working principle of the utility model is as follows:
when in use, the pressure spring 7 is adjusted to a certain pressure value, the control port 11 is communicated with the control pipeline, and the liquid inlet 10 and the liquid outlet 9 in the lower valve body 1 are connected in series in the controlled pipeline; when the liquid pressure in the control pipeline is smaller than the fixed value of the pressure spring, the upward force acting on the valve core 5 is smaller than the downward force acting on the valve core 5 by the pressure spring 7, and at the moment, the valve core 5 is wholly subjected to the downward force, so that the valve core 5 drives the valve rod 3 to move downwards to seal between the lower end of the valve rod 3 and the liquid outlet 9, and the liquid circulation between the liquid inlet 10 and the liquid outlet 9 in the lower valve body 1 is blocked, so that the controlled pipeline is closed; when the liquid pressure in the control pipeline is larger than the fixed value of the pressure spring, the upward force acting on the valve core 5 is larger than the downward force acting on the valve core 5 by the pressure spring 7, and the valve core 5 is wholly acted by the upward force at the moment, so that the valve core 5 drives the valve rod 3 to move upwards, the lower end of the valve rod 3 is opened with the liquid outlet 9 of the lower valve body 1, the liquid inlet 10 is communicated with the liquid outlet 9, and the liquid is communicated by the control pipeline; thus, when the positive feedback control relation between the two pipelines and the automatic control requirement are met, the automatic opening and closing function of the controlled pipeline is realized.
Claims (3)
1. The utility model provides a positive feedback pressure control valve, includes pressure spring, long bolt and nut, characterized by: the valve is characterized by further comprising a lower valve body, a middle valve block, a valve rod, a valve tube, a valve core, an upper valve body, a spring limiting block and a fixing nut, wherein the upper end of the lower valve body is connected with the bottom surface of a boss arranged in the middle of the middle valve block, the lower end of the middle valve block is inserted into a liquid cavity arranged in the lower valve body, the lower end of the valve tube is connected with the top surface of the boss arranged in the middle of the middle valve block, the upper end of the middle valve block is inserted into the lower part in the valve tube, the upper end of the valve tube is connected with the lower end of the upper valve body, the lower valve body, the middle valve block, the valve tube and the upper valve body are connected into a whole through a long bolt and a nut, the lower end of the valve rod penetrates through a valve rod hole arranged in the middle valve block and is firmly sealed with a liquid outlet arranged in the lower valve body, the valve core is arranged at the middle upper part of the valve rod and is fixed on the valve rod through the fixing nut, the valve core is positioned in a working cavity formed between the valve tube, the lower end of the pressure spring is arranged on the upper end surface of the valve core and the upper end of the middle valve block, the upper end of the pressure spring is positioned in a spring hole arranged in the upper valve body, the upper end of the valve block is connected with the upper end of the upper valve body, which is connected with the upper end of the upper valve body, and the upper end of the upper valve body is fixed with the lower end of the upper valve body.
2. A positive feedback pressure control valve as claimed in claim 1, characterized by: the lower valve body is provided with a liquid cavity, a liquid inlet and a liquid outlet, the liquid outlet is arranged in the lower valve body and is positioned in the center of the bottom surface of the liquid cavity, and the liquid inlet is arranged on the side surface of the lower valve body and is communicated with the liquid cavity.
3. A positive feedback pressure control valve as claimed in claim 1, characterized by: and a control port is arranged on the side wall of the valve pipe and is communicated with a working cavity between the middle valve block and the valve core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320647315.XU CN219198150U (en) | 2023-03-28 | 2023-03-28 | Positive feedback pressure control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320647315.XU CN219198150U (en) | 2023-03-28 | 2023-03-28 | Positive feedback pressure control valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219198150U true CN219198150U (en) | 2023-06-16 |
Family
ID=86706029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320647315.XU Active CN219198150U (en) | 2023-03-28 | 2023-03-28 | Positive feedback pressure control valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219198150U (en) |
-
2023
- 2023-03-28 CN CN202320647315.XU patent/CN219198150U/en active Active
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