Electric dust butterfly valve system

Abstract

The utility model discloses an electric dust butterfly valve system which comprises a first valve plate and a second valve plate which are sequentially arranged in a pipeline to form a series-connection double-valve-plate system. The pressure switch is used for detecting the static pressure of materials on the first valve plate, and the pressure switch is a double-set-pressure switch; the main circuit breaker is electrically connected with a main loop and a control loop; the first motor is used for driving the first valve plate; the second motor is used for driving the second valve plate; wherein when the static pressure detected by the pressure switch is higher than 1.0 MPa, the first motor is controlled to rotate reversely to enable the first valve plate to be in a semi-open state for pressure relief, and when the static pressure is lower than 0.5 MPa, the first motor is controlled to rotate forwards to enable the first valve plate to be fully closed. The electric dust butterfly valve system has the advantages that the double valve plates which are sequentially arranged in the pipeline are adopted in the electric dust butterfly valve system and are intelligently controlled, the overall pressure bearing capacity can be improved, and the service life of the butterfly valve is prolonged.

Description

Technical Field

[0001] The utility model relates to a control system of a butterfly valve, in particular to an electric dust butterfly valve system. Background Art

[0002] Electric dust butterfly valve is a commonly used material control device in industrial production, mainly used to control the flow and cut-off of powdered materials. The existing electric dust butterfly valve realizes switch control by driving the valve plate to rotate by a motor. This control method is widely used in powder conveying systems.

[0003] The working process of the existing electric dust butterfly valve is usually as follows: when the material needs to be conveyed, the motor drives the valve shaft to rotate, driving the valve plate to rotate from the vertical position to the horizontal position to open the conveying channel; when the material needs to be cut off, the motor reverses to make the valve plate return to the vertical position to block the flow of materials. In this process, the valve plate needs to overcome the gravity of the material and the flow pressure to complete the switching action.

[0004] Since there are many kinds of powder materials transported in industrial production, their physical properties vary greatly. Some materials are highly abrasive, while others are easy to agglomerate or have a large accumulation pressure. These complex material characteristics bring great challenges to the valve plate. Especially when the amount of material accumulation is large, the huge static pressure will directly act on the valve plate, which can easily cause the valve plate to deform or break.

[0005] In actual applications, when the amount of material in the conveying pipeline suddenly increases, the pressure on the valve plate will rise sharply. In this case, the valve plate is prone to bending and deformation, and in severe cases, it may even cause the valve plate to break. Once the valve plate is damaged, it will not only cause material leakage and production losses, but may also cause equipment shutdown and affect the normal operation of the entire production line. In addition, frequent replacement of damaged valve plates also increases maintenance costs and downtime. Utility Model Content

[0006] The utility model aims to provide an electric dust butterfly valve system, which adopts double valve plates arranged in sequence in a pipeline and performs intelligent control on them, thereby improving the overall pressure bearing capacity and extending the service life of the butterfly valve.

[0007] The above technical objectives of the utility model are achieved through the following technical solutions:

[0008] An electric dust butterfly valve system comprises: a first valve plate and a second valve plate, which are arranged in sequence in a pipeline to form a series double valve plate system; a pressure switch, which is used to detect the static pressure of the material on the first valve plate, and the pressure switch is a double-setting pressure switch; a main circuit breaker QF, which is electrically connected to a main circuit and a control circuit; a first motor, which is used to drive the first valve plate; and a second motor, which is used to drive the second valve plate; wherein, when the static pressure detected by the pressure switch is higher than 1.0 MPa, the first motor is controlled to reverse so that the first valve plate is in a half-open state for pressure relief, and when the static pressure is lower than 0.5 MPa, the first motor is controlled to rotate forward so that the first valve plate is fully closed.

[0009] The utility model is further configured as follows: the main circuit includes: a first thermal relay, connected to the first motor; a first relay and a second relay, connected to the first thermal relay and arranged in parallel, the first relay is used to control the forward rotation of the first motor, and the second relay is used to control the reverse rotation of the first motor; a second thermal relay, connected to the second motor; a third relay and a fourth relay, connected to the second thermal relay and arranged in parallel, the third relay is used to control the forward rotation of the second motor, and the fourth relay is used to control the reverse rotation of the second motor.

[0010] The utility model is further configured as follows: the control circuit comprises: a first push switch; a circuit 1 and a circuit 2, which are connected to the first push switch, the circuit 1 is used to control the first motor, and the circuit 2 is used to control the second motor.

[0011] The utility model is further configured as follows: loop 1 includes: branch 1 and branch 2, which are connected to the pressure switch.

[0012] The utility model is further configured as follows: branch one comprises: a first switch; a first contactor connected to the first switch; and a first power-on delay relay connected to the first contactor.

[0013] The utility model is further configured as follows: branch circuit 2 includes: a second switch; a second contactor connected to the second switch; and a second power-on delay relay connected to the second contactor.

[0014] The utility model is further configured as follows: loop two includes: a second push switch; a sliding switch connected to the second push switch; branch three and branch four connected to the sliding switch, branch three is used to control the forward rotation of the second motor, and branch four is used to control the reverse rotation of the second motor.

[0015] The utility model is further configured as follows: branch three includes: a third switch; a third contactor connected to the third switch; and a third power-on delay relay connected to the third contactor.

[0016] The utility model is further configured as follows: branch circuit four comprises: a fourth switch; a fourth contactor connected to the fourth switch; and a fourth power-on delay relay connected to the fourth contactor.

[0017] In summary, the utility model has the following beneficial effects:

[0018] The electric dust butterfly valve system adopts a double valve plate in series, and realizes the automatic adjustment function of the valve plate through an intelligent control system. The first valve plate is responsible for pressure regulation. When the static pressure of the material exceeds 1.0MPa, it automatically enters a semi-open state for pressure relief, and returns to a fully closed state when it is lower than 0.5MPa; the second valve plate is responsible for material conveying control. This division of labor and cooperation design not only effectively prevents a single valve plate from being damaged by excessive pressure, but also ensures the reliability of the valve plate movement through delay control. The thermal relay and pressure switch equipped in the system provide protection functions and effectively extend the service life of the equipment. The overall solution solves the problem that the traditional single valve plate system is easily damaged when a large amount of material is accumulated, and improves the safety and stability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Circuit diagram of the main circuit;

[0020] Figure 2 is the circuit diagram of the control loop;

[0021] Figure numerals: 1. main circuit breaker; 2. first motor; 3. second motor; 4. first thermal relay; 5. first relay; 6. second relay; 7. second thermal relay; 8. third relay; 9. fourth relay; 10. first push switch; 11. first thermal contactor; 112. second thermal contactor; 12. pressure switch; 13. first switch; 14. first contactor; 15. first power-on delay relay; 16. second switch; 17. second contactor; 18. second power-on delay relay; 19. second push switch; 20. sliding switch; 21. third switch; 22. third contactor; 23. third power-on delay relay; 24. fourth switch; 25. fourth contactor; 26. fourth power-on delay relay. DETAILED DESCRIPTION

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "page", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0024] In the description of the present utility model, "multiple" means two or more than two, unless otherwise clearly specified and specifically defined. In the present utility model, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal connection of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0025] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0026] like Figure 1 As shown, an electric dust butterfly valve system is a series double valve plate system arranged in sequence in a pipeline, including a main circuit breaker 1. The main circuit breaker 1 is used to control the on and off of the entire system. The main circuit breaker 1 is electrically connected to a main circuit and a control circuit.

[0027] The main circuit includes a first motor 2 and a second motor 3. The first motor 2 is used to control the operation of the first valve plate. The second motor 3 is used to control the operation of the second valve plate. The first motor 2 is connected to a first thermal relay 4. The first thermal relay 4 is connected to a first relay 5 for controlling the forward rotation of the first motor 2. The first relay 5 is provided in parallel with a second relay 6. The second relay 6 is used to control the reverse rotation of the first motor 2.

[0028] The second motor 3 is connected to a second thermal relay 7. The first thermal relay 4 and the second thermal relay 7 are used for overheat protection. When the motor is overheated, the first thermal relay 4 and the second thermal relay 7 can be cut off to achieve a circuit breaker effect. The second thermal relay 7 is connected to a third relay 8 and a fourth relay 9. The third relay 8 and the fourth relay 9 are connected in parallel. Among them, the third relay 8 is used to control the second motor 3 to rotate forward, and the fourth relay 9 is used to control the second motor 3 to rotate reversely.

[0029] As described above, the operation of the first motor 2 and the second motor 3 is controlled according to the on / off conditions of the first to fourth relays 5 to 9 .

[0030] like Figure 2 As shown, the control circuit includes a first push switch 10. When the operator presses down the first push switch 10, the control circuit is energized.

[0031] The first push switch 10 is connected to two circuits, namely, circuit one for controlling the first motor 2 and circuit two for controlling the second motor 3. Circuit one is provided with a first thermal contactor 11, and circuit two is provided with a second thermal contactor 112. When the first motor 2 or the second motor 3 is overheated, the first thermal contactor 11 and the second thermal contactor 112 control the opening and closing of circuit one and circuit two. Circuit one is used to control the operation of the first motor 2, and circuit two is used to control the operation of the second motor 3.

[0032] The circuit 1 also includes a pressure switch 12 connected to the first thermal contactor 11. The pressure switch 12 is a dual-setting pressure switch. The pressure switch 12 is connected to two branches, namely branch 1 and branch 2. The pressure level set in branch 1 is greater than or equal to 1.0 MPa. When the static pressure of the material on the first valve plate is greater than 1.0 MPa, branch 1 is disconnected and the pressure switch 12 is switched to branch 2.

[0033] Branch 1 also includes a first switch 13. The first switch 13 is connected to a first contactor 14. The first contactor 14 is connected to a first power-on delay relay 15. When branch 1 is turned on, the first contactor 14 works, so that the first relay 5 in the main circuit is closed, and then the first motor 2 rotates forward. The first power-on delay relay 15 starts timing. After the timing ends, the first switch 13 is turned off, so that branch 1 is disconnected. The first motor 2 stops.

[0034] Branch 2 also includes a second switch 16. The second switch 16 is connected to a second contactor 17. The second contactor 17 is connected to a second power-on delay relay 18. When branch 2 is turned on, the second contactor 17 works, so that the second relay 6 in the main circuit is closed, and then the first motor 2 is reversed. The second power-on delay relay 18 starts timing. After the timing ends, the second switch 16 is turned off, so that branch 2 is disconnected. The first motor 2 stops.

[0035] The circuit 2 also includes a second push switch 19. When the second push switch 19 is pressed, the circuit 2 is turned on. The second push switch 19 is connected to a slide switch 20. The slide switch 20 is connected to two branches, namely branch 3 and branch 4. Branch 3 is used to control the second motor 3 to rotate forward, and branch 4 is used to control the second motor 3 to rotate reversely.

[0036] Branch three also includes a third switch 21. The third switch 21 is connected to a third contactor 22. The third contactor 22 is connected to a third power-on delay relay 23. When branch three is turned on, the third contactor 22 works, so that the third relay 8 in the main circuit is closed, and then the second motor 3 rotates forward. The third power-on delay relay 23 starts timing. After the timing ends, the third switch 21 is turned off, so that branch three is disconnected. The second motor 3 stops.

[0037] Branch three also includes a fourth switch 24. The fourth switch 24 is connected to a fourth contactor 25. The fourth contactor 25 is connected to a fourth power-on delay relay 26. When branch four is turned on, the fourth contactor 25 works, so that the fourth relay 9 in the main circuit is closed, and then the second motor 3 is reversed. The fourth power-on delay relay 26 starts timing. After the timing ends, the fourth switch 24 is turned off, so that branch four is disconnected. The second motor 3 stops.

[0038] Interlocking may be added between the first switch 13, the second switch 16, and between the third switch 21, the fourth switch 24, so that when the first switch 13 is closed, the second switch 16 is opened, when the third switch 21 is closed, the fourth switch 24 is opened, and vice versa.

[0039] Overall working process:

[0040] The first valve plate described in the present application contacts the material first, and the second valve plate contacts the material later. In the initial state, the first valve plate is in a fully open state, and the second valve plate is in a half-open state. When the system is powered on, branch one is turned on, and when the second push switch 19 is operated, branch three is turned on and works, so that the first valve plate is fully closed and the second valve plate is fully closed. Then the second push switch 19 is operated again, so that branch three is cut off. When the static pressure of the material is placed on the first valve plate, the static pressure gradually accumulates on the first valve plate. When the static pressure is higher than 1.0MPa, the pressure switch 12 switches to branch two. Branch two is turned on. Branch two controls the first motor 2 to reverse, so that the first valve plate is half-open within the timing range, thereby relieving the static pressure of the material and preventing the first valve plate from being damaged.

[0041] When the pressure is released to a static pressure lower than 0.5 MPa, the pressure switch 12 switches to branch 1, so that the first motor 2 rotates forward, thereby fully closing the first valve plate, so that the first valve plate plays the role of accumulating pressure again.

[0042] The second valve plate is used to control the in and out of materials. When the material needs to be discharged from the valve pipeline, the sliding switch 20 is switched to branch 4, and the second push switch 19 is operated to make branch 4 conductive. When branch 4 is conductive, the second valve plate is fully opened, so that the material leaves the valve pipeline and the purpose of outputting the material is achieved. After the material output is completed, the sliding switch 20 is switched to branch 3, so that branch 3 is conductive, and the second valve plate is fully closed, closing the material outlet.

[0043] As mentioned above, the timing duration of the first power-on delay relay 15 to the fourth power-on delay relay 26 is set according to the rotation switching state of the first motor 2 and the second motor 3 .

[0044] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. An electric dust butterfly valve system, characterized in that: include: The first valve plate and the second valve plate are arranged in sequence in the pipeline to form a series double valve plate system; A pressure switch, used to detect the static pressure of the material on the first valve plate, wherein the pressure switch is a dual-setting pressure switch; A main circuit breaker, wherein the main circuit breaker is electrically connected to a main circuit and a control circuit; a first motor, used for driving the first valve plate; a second motor, used for driving the second valve plate; Among them, when the static pressure detected by the pressure switch is higher than 1.0MPa, the first motor is controlled to reverse and the first valve plate is in a half-open state to release pressure. When the static pressure is lower than 0.5MPa, the first motor is controlled to rotate forward and the first valve plate is fully closed.

2. The electric dust butterfly valve system according to claim 1 is characterized in that: The main circuit comprises: a first thermal relay connected to the first motor; A first relay and a second relay are connected to the first thermal relay and are arranged in parallel, the first relay is used to control the first motor to rotate forward, and the second relay is used to control the first motor to rotate reversely; a second thermal relay connected to the second motor; The third relay and the fourth relay are connected to the second thermal relay and are arranged in parallel. The third relay is used to control the forward rotation of the second motor, and the fourth relay is used to control the reverse rotation of the second motor.

3. The electric dust butterfly valve system according to claim 1, characterized in that: The control loop comprises: First push switch; Loop 1 and loop 2 are connected to the first push switch, the loop 1 is used to control the first motor, and the loop 2 is used to control the second motor.

4. The electric dust butterfly valve system according to claim 3 is characterized in that: The first circuit comprises: Branch 1 and branch 2 are connected to the pressure switch.

5. The electric dust butterfly valve system according to claim 4, characterized in that: The branch 1 comprises: First switch; a first contactor connected to the first switch; The first relay for power-on delay is connected with the first contactor.

6. The electric dust butterfly valve system according to claim 4, characterized in that: The second branch includes: Second switch; a second contactor connected to the second switch; The second power-on delay relay is connected to the second contactor.

7. The electric dust butterfly valve system according to claim 3, characterized in that: The second circuit comprises: Second push switch; A sliding switch connected to the second push switch; Branch three and branch four are connected to the sliding switch, branch three is used to control the second motor to rotate forward, and branch four is used to control the second motor to rotate reversely.

8. The electric dust butterfly valve system according to claim 7, characterized in that: The branch three includes: The third switch; a third contactor connected to the third switch; The third power-on delay relay is connected to the third contactor.

9. The electric dust butterfly valve system according to claim 7, characterized in that: The branch 4 comprises: Fourth switch; a fourth contactor connected to the fourth switch; A fourth power-on delay relay is connected to the fourth contactor.

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