CN210739472U - Non-resistance check valve - Google Patents
Non-resistance check valve Download PDFInfo
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- CN210739472U CN210739472U CN201920740994.9U CN201920740994U CN210739472U CN 210739472 U CN210739472 U CN 210739472U CN 201920740994 U CN201920740994 U CN 201920740994U CN 210739472 U CN210739472 U CN 210739472U
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Abstract
The utility model discloses a non-resistance check valve, which comprises a valve body which can be connected in a pipeline, a flange which is arranged at the middle part of the valve body and a valve plate which is arranged at the center of the flange, wherein the valve plate is connected with an actuating mechanism and is provided with a switch control port, and is also provided with a pressure difference switch which is electrically connected with the actuating mechanism and is provided with at least two pressure interfaces which are respectively arranged at two sides of the valve plate, a passing direction can be limited for the pipeline by arranging at least two trigger set values on the pressure difference switch, when water flows along the direction, the pressure difference value measured by the pressure difference switch in the direction exceeds the set value, the valve plate is closed to prevent the water from passing through, and when the water flows along the direction, the valve plate is in an open state, the non-resistance check valve can not bring additional resistance to the flow of water flow, and is beneficial to improving the efficiency of water flow passing.
Description
Technical Field
The utility model relates to a check valve technical field especially indicates a non-resistance check valve.
Background
The check valve is characterized in that a valve plate of the check valve in the prior art is mainly divided into a lifting type and a swing type, and the working principle is that when the inlet pressure is greater than the sum of the weight of the valve clack and the flow resistance of the valve clack, the valve is opened, otherwise, the valve is closed when the medium flows backwards, but the check valve can play a role of safely isolating and preventing the backflow, but can cause larger resistance to the medium flowing forwards, thereby invisibly wasting the energy consumed by transporting the medium and reducing the transportation efficiency.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention provides a non-resistance check valve, which does not cause resistance to a forward flowing medium on the basis of preventing backflow.
Based on the above-mentioned purpose the utility model provides a pair of non-resistance check valve for the pipeline, include:
a butterfly valve, which can be installed in a pipeline, comprises
A valve body connectable in a pipeline;
the flange is arranged in the middle of the valve body;
the valve plate is arranged in the center of the flange;
the actuating mechanism is connected with the valve plate and is provided with a switch control port;
the pressure difference switch is electrically connected with the actuating mechanism, is provided with at least two pressure interfaces and is respectively arranged on two sides of the valve plate;
the pressure difference switch is provided with at least two trigger set values which are respectively used for triggering the actuating mechanism to open and close the valve plate.
Preferably, the pressure difference switch both sides all are connected with the detecting tube, and the one end of two detecting tubes is connected to pressure switch's pressure interface respectively, and the other end of two detecting tubes is connected with annular detection piece, and annular detection piece installs on the flange, is equipped with the inspection hole of a plurality of equipartition on the annular detection piece.
Preferably, the number of the detection holes is set to 6.
Preferably, the detection hole is provided in a bell mouth shape.
Preferably, the through diameter of the detection hole is set to 10 mm.
Preferably, the actuator can be a pneumatic actuator, an electric actuator or a hydraulic actuator.
From the above, it can be seen that the utility model provides a non-resistance check valve, through setting up butterfly valve and differential pressure switch, and set up two pressure interfaces of differential pressure switch respectively in the both sides of valve plate, can measure the pressure differential of valve plate both sides, through setting up at least two trigger set values on differential pressure switch, can limit a direction of passage to the pipeline, when rivers flow along this direction, the differential pressure value that differential pressure switch measured in this direction surpasses the set value, open the valve plate and allow rivers to pass through, when rivers move against this direction, differential pressure switch measures the differential pressure value in opposite direction and surpasses the set value, close the valve plate and prevent rivers from passing through, thereby realize the non-return function, and when rivers flow forward, the valve plate is in the open mode, this non-resistance check valve can not bring additional resistance to the flow of rivers, help improving the efficiency that rivers pass through, the energy-saving effect is achieved.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention;
fig. 2 is the utility model discloses the inside structure schematic diagram that looks sideways of valve body.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings.
It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are used for distinguishing two entities with the same name but different names or different parameters, and it is understood that "first" and "second" are only used for convenience of expression and should not be understood as limitations to the embodiments of the present invention, and the following embodiments do not describe any more.
The utility model provides a non-resistance check valve, including being arranged in installing the butterfly valve in pipeline 101, the butterfly valve is including valve body 1, valve body 1 is used for connecting in pipeline 101, 1 mid-mounting of valve body has flange 2, 2 center installations can open and close valve plate 3 of flange, valve plate 3 is connected with actuating mechanism 4, it is specific, actuating mechanism 4 mountable is outside pipeline 101, actuating mechanism 4 has the on-off control port, differential pressure switch 5 is connected with actuating mechanism 4 electricity, at least two pressure interfaces have, set up respectively in the both sides of valve plate 3, differential pressure switch 5 is provided with two at least trigger setting values, be used for triggering actuating mechanism 4 respectively and open and close valve plate 3, two trigger setting value vectors that differential pressure switch 5 set up are opposite.
Through setting up butterfly valve and differential pressure switch 5, and set up two pressure interfaces of differential pressure switch 5 respectively in the both sides of valve plate 3, can measure the pressure differential of valve plate 3 both sides, through set up two at least trigger setting values on differential pressure switch 5, can prescribe a limit to pipeline 101 and pass through the direction, when rivers flow along this direction, the differential pressure value that differential pressure switch 5 surveyed in this direction exceeds the setting value, open valve plate 3 and allow rivers to pass through, when rivers move against this direction, differential pressure switch 5 surveys the differential pressure value in opposite direction and exceeds the setting value, close valve plate 3 and prevent rivers and pass through, thereby realize the non return function, and when rivers forward flow, valve plate 3 is in the open mode, this non-resistance check valve can not bring additional resistance to the flow of rivers, help improving the efficiency that rivers pass through, reach energy-conserving effect.
It is optional, differential pressure switch 5's both sides all are connected with detecting tube 6, the one end of two detecting tubes 6 is connected to differential pressure switch 5's pressure interface respectively, the other end of two detecting tubes 6 is connected with annular detection piece 7, annular detection piece 7 is installed on flange 2, be equipped with the inspection hole 8 of a plurality of equipartition on the annular detection piece 7, because rivers probably can not carry out even contact with the inner wall of pipeline 101 when getting into pipeline 101, through setting up detecting tube 6 and annular detection piece 7, can improve the sensitivity and the accuracy of the pressure detection who produces rivers.
Alternatively, the number of the detection holes 8 is set to 6 on the ring-shaped detection member 7.
Optionally, in order to improve the water flow passing performance of the detection hole 8, the detection hole 8 is flared.
Alternatively, the actuator 4 may be a pneumatic actuator, an electric actuator, or a hydraulic actuator.
When the non-resistance check valve disclosed by the utility model is used, the valve body 1 of the butterfly valve is connected in the pipeline 101, so that the valve body 1 connects two sections of pipelines into a whole, two trigger set values are arranged on the differential pressure switch 5 and are respectively used for triggering the actuating mechanism 4 to open and close the valve plate 3, and the vectors of the two trigger set values are opposite, for example, for the pipeline 101, water flow is allowed to flow from left to right, but the water flow is prevented from flowing back from right to left, because the valve plate 3 is in a closed state under an initial state, when the water flow flows from left to right, the water flow firstly reaches the left side of the valve plate 3 and enters the left detection pipe 6 through the bell-mouth-shaped detection hole 8, so that the pressure in the left detection pipe 6 is increased, and because the valve plate 3 is not opened at the moment, the pressure in the detection pipe 6 on the right side of the valve plate 3 is not changed, the differential pressure measured by, when the set value is reached, the differential pressure switch 5 starts the actuating mechanism 4, so that the actuating mechanism 4 opens the valve plate 3, and water flow in the pipeline 101 can flow from the left side of the valve plate 3 to the right side of the valve plate 3;
when rivers normally pass through, probably have rivers to get into the test tube 6 from the inspection hole 8 on valve plate 3 right side, make the pressure increase in the test tube 6 on valve plate 3 right side, but this pressure can not exceed the pressure in the test tube 6 on valve plate 3 left side, and pressure differential switch 5's measured value is still positive value on the vector from left to right, can not trigger another trigger setting value in pressure differential switch 5, and valve plate 3 still can be in the open mode, and rivers can continuously pass through smoothly.
When water flow from right to left occurs in the pipeline 101, the water flow firstly reaches the right side of the valve plate 3 and enters the detection pipe 6 on the right side through the bell-mouth-shaped detection hole 8, so that the pressure in the detection pipe 6 on the right side is increased, and at the moment, the pressure in the detection pipe 6 on the right side is certainly greater than the pressure in the detection pipe 6 on the left side, the measured value of the differential pressure switch 5 is a positive value on a vector from the right to the left, and when the measured value exceeds a set value on the vector, the differential pressure switch 5 starts a closing line in the actuating mechanism 4 to close the valve plate 3, so that the water flow is prevented from moving from the right side of the valve plate 3 to the left side.
By adjusting the set value of the differential pressure switch 5, the sensitivity of the non-resistance check valve can be adjusted.
Optionally, the differential pressure switch 5 is a CWK-100TS type double-contact differential pressure switch.
As another alternative, the differential pressure switch 5 may be replaced by a differential pressure transmitter, that is, the differential pressure transmitter is at least provided with two pressure interfaces, which are respectively arranged on two sides of the valve plate 3, the differential pressure transmitter is electrically connected to a controller, the controller is electrically connected to the actuator 4, and can control the actuator 4 to act, the differential pressure transmitter sends a measured differential pressure signal to the controller, the controller is provided with two set values with opposite vectors, which respectively correspond to a direction in which water flows through the pipeline 101 and a direction in which water flows are blocked, for convenience of description, the direction in which water flows through the pipeline 101 is defined as a forward direction from left to right, and the direction in which water flows is blocked is from right to left, when water flows in the pipeline 101 along the forward direction, the water first reaches the left side of the valve plate 3 and enters the left detection pipe 6 through the bell-mouth-shaped detection hole 8, so that the pressure in, the valve plate 3 is not opened at this time, the differential pressure measured by the differential pressure transmitter is gradually increased on a vector from left to right, and when the controller judges that the differential pressure value exceeds a set value on the vector, the actuator 4 is controlled to open the valve plate 3, so that water flow in the pipeline 101 can flow from the left side of the valve plate 3 to the right side of the valve plate 3;
when reverse water flow occurs in the pipeline 101, the water flow firstly reaches the right side of the valve plate 3 and enters the detection pipe 6 on the right side through the bell-mouth-shaped detection hole 8, so that the pressure in the detection pipe 6 on the right side is increased, and the pressure in the detection pipe 6 on the right side is certainly greater than the pressure in the detection pipe 6 on the left side at the moment, the measured value of the differential pressure transmitter is a positive value on a reverse vector, the controller receives the measured value, and when the measured value reaches a reverse upward set value set in the controller, the control execution mechanism 4 closes the valve plate 3 to prevent the water flow from moving from the right side of the valve plate 3 to the left side of the valve plate 3, so that the non-.
Optionally, the pressure difference transmitter is an STD924 type pressure difference transmitter, and the controller is a PLC.
Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, is limited to these examples; within the idea of the invention, also combinations between technical features in the above embodiments or in different embodiments are possible, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity. Therefore, any omission, modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (6)
1. A non-resistance check valve for a pipeline, comprising:
a butterfly valve, which can be installed in a pipeline, comprises
A valve body connectable in a pipeline;
the flange is arranged in the middle of the valve body;
the valve plate is arranged in the center of the flange;
the actuating mechanism is connected with the valve plate and is provided with a switch control port;
the pressure difference switch is electrically connected with the actuating mechanism, is provided with at least two pressure interfaces and is respectively arranged on two sides of the valve plate;
the pressure difference switch is provided with at least two trigger set values which are respectively used for triggering the actuating mechanism to open and close the valve plate.
2. The non-resistance check valve of claim 1, wherein two sides of the differential pressure switch are connected with detection tubes, one ends of the two detection tubes are respectively connected to the pressure ports of the differential pressure switch, the other ends of the two detection tubes are connected with an annular detection member, the annular detection member is mounted on the flange, and the annular detection member is provided with a plurality of detection holes which are uniformly distributed.
3. A non-resistance check valve as claimed in claim 2, wherein the check hole is provided in 6 number.
4. A non-resistance check valve as claimed in claim 2, wherein said check hole is flared.
5. A non-resistance check valve as claimed in claim 2, wherein the check hole diameter is set to 10 mm.
6. A non-resistance check valve as claimed in claim 1, wherein the actuator is selected from a pneumatic actuator, an electric actuator or a hydraulic actuator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920740994.9U CN210739472U (en) | 2019-05-22 | 2019-05-22 | Non-resistance check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920740994.9U CN210739472U (en) | 2019-05-22 | 2019-05-22 | Non-resistance check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210739472U true CN210739472U (en) | 2020-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920740994.9U Active CN210739472U (en) | 2019-05-22 | 2019-05-22 | Non-resistance check valve |
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| CN (1) | CN210739472U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113399060A (en) * | 2021-07-13 | 2021-09-17 | 株洲长江硬质合金设备有限公司 | Automatic control system of wet grinding machine and wet grinding method |
| CN113685372A (en) * | 2021-08-30 | 2021-11-23 | 华能山东石岛湾核电有限公司 | Non-return device of fan export and have its fan |
-
2019
- 2019-05-22 CN CN201920740994.9U patent/CN210739472U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113399060A (en) * | 2021-07-13 | 2021-09-17 | 株洲长江硬质合金设备有限公司 | Automatic control system of wet grinding machine and wet grinding method |
| CN113399060B (en) * | 2021-07-13 | 2024-04-12 | 株洲长江硬质合金设备股份有限公司 | Automatic control system of wet grinding machine and wet grinding method |
| CN113685372A (en) * | 2021-08-30 | 2021-11-23 | 华能山东石岛湾核电有限公司 | Non-return device of fan export and have its fan |
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