Fireproof and anti-static butterfly valve

Abstract

The utility model discloses a fireproof and anti-static butterfly valve, belongs to the technical field of valves, and solves the problem that static electricity generated by friction between a butterfly plate and a sealing ring is possibly reduced. Comprising a valve body, a butterfly plate rotationally arranged in the valve body, a valve seat fixedly connected to the valve body, a valve rod rotationally connected into the valve seat and fixedly connected with the butterfly plate, and a servo motor fixedly connected to the valve seat and in coaxial transmission connection with the valve rod. The butterfly valve further comprises a sealing annular air bag fixedly connected to the inner ring of the valve body, a gap exists between the butterfly plate and the inner ring of the valve body, the sealing annular air bag is located between the outer ring of the butterfly plate and the inner ring of the valve body, and the sealing annular air bag has a shrunken state and a bulged state. In the actual working process of the butterfly valve, the contact between the butterfly plate and the sealing annular air bag can be reduced as much as possible, and the possibility of static electricity is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a fireproof and anti-static butterfly valve. Background Art

[0002] A butterfly valve is a regulating valve with a simple structure and small volume, which is widely used in many fields such as petroleum, chemical industry, metallurgy, hydropower, etc. Its main feature is that the valve body is designed in a butterfly shape, and the valve flap can be fully opened or fully closed by rotating 90 degrees around the axis, with simple and fast operation. The butterfly valve has good sealing performance, can achieve a tight sealing effect, and at the same time has good fluid control characteristics, and can withstand a large pressure and temperature range. The opening and closing torque of the butterfly valve is small, and it is easy to realize automatic control. In addition, the butterfly valve also has the advantages of small flow resistance, light weight, and convenient installation, and is suitable for the control of various media, including liquids, gases, particles, etc.

[0003] During the opening and closing process of the butterfly valve, the contact and separation between the butterfly plate and the valve body may cause the generation of static electricity, especially during rapid or frequent operations, which is caused by their hard seals. Therefore, currently, soft seals are used for sealing. However, in actual applications, it has been found that the rubber material sealing ring used in the valve body to fit with the butterfly plate will also have a certain degree of friction with the butterfly plate during the actual opening and closing process of the butterfly plate. The friction between the metal plate and the rubber material sealing ring will also generate static electricity, only the probability of generating static electricity is lower. However, there will still be certain potential safety hazards, especially when the transported medium is a flammable and explosive fluid. This situation requires more attention, and the friction between the two should be reduced as much as possible.

[0004] Therefore, a fireproof and anti-static butterfly valve is proposed to solve or alleviate the above problems. Content of the Utility Model

[0005] The purpose of the utility model is to solve the deficiencies existing in the prior art and propose a fireproof and anti-static butterfly valve.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A fireproof and anti-static butterfly valve, comprising a valve body, a butterfly plate rotatably arranged in the valve body, a valve seat fixedly connected to the valve body, a valve stem rotatably connected in the valve seat and fixedly connected to the butterfly plate, and a servo motor fixedly connected to the valve seat and coaxially drivingly connected to the valve stem;

[0008] It also includes a sealed annular airbag fixedly connected to the inner ring of the valve body. There is a gap between the butterfly plate and the inner ring of the valve body. The sealed annular airbag is located between the outer ring of the butterfly plate and the inner ring of the valve body. The sealed annular airbag has a deflated state and an inflated state. When the sealed annular airbag is in the deflated state, the thickness of the sealed annular airbag is less than the gap between the butterfly plate and the valve body. When the sealed annular airbag is in the inflated state, the thickness of the sealed annular airbag is greater than the gap between the butterfly plate and the valve body.

[0009] Preferably, the sealed annular airbag is connected to a connecting pipe penetrating the valve body. The connecting pipe is connected to an air pump, and the air pump includes a servo motor 1.

[0010] Preferably, it also includes a microcontroller, a servo motor controller 1, and a relay module. The servo motor controller 1 is connected to the power supply through the relay module. The controlled end of the relay module is coupled to the output end of the microcontroller. The output end of the microcontroller is coupled to the input end of the servo motor controller 1. The output end of the servo motor controller 1 is coupled to the input end of the servo motor 1.

[0011] Preferably, it also includes a pressure sensor. The detection end of the pressure sensor is communicated into the connecting pipe. The output end of the pressure sensor is coupled to the input end of the microcontroller. The pressure sensor collects the air pressure in the connecting pipe and sends out an air pressure signal.

[0012] Preferably, it also includes a voltage comparison circuit 1, a voltage comparison circuit 2, and a servo motor controller 2. The input ends of the voltage comparison circuit 1 and the voltage comparison circuit 2 are both coupled to the pressure sensor. The output ends of the voltage comparison circuit 1 and the voltage comparison circuit 2 are both coupled to the input end of the servo motor controller 2. The servo motor controller 2 is coupled to a servo motor 2. The reference air pressure signal 1 in the voltage comparison circuit 1 is greater than the reference air pressure signal 2 in the voltage comparison circuit 2. The voltage comparison circuit 1 responds to the air pressure signal and sends out an air pressure detection signal 1 when the air pressure signal is greater than the reference air pressure signal 1. The voltage comparison circuit 2 responds to the air pressure signal and sends out an air pressure detection signal 2 when the air pressure signal is less than the reference air pressure signal 2.

[0013] Preferably, both the voltage comparison circuit 1 and the voltage comparison circuit 2 include a voltage comparator and several resistors.

[0014] Preferably, it also includes a main controller, a wireless module 1, and a wireless module 2. The main controller is coupled to the wireless module 1. The wireless module 1 and the wireless module 2 are wirelessly communicatively connected. The wireless module 2 is coupled to the microcontroller and the servo motor controller 2.

[0015] Preferably, the main controller and the microcontroller are both STM32 single-chip microcomputers, and the first wireless module and the second wireless module are both ESP8266 chips.

[0016] Preferably, the surfaces of the butterfly plate, the valve body, and the valve seat are successively coated with a fireproof coating and a UV-cured resin antistatic coating.

[0017] The utility model has the following beneficial effects:

[0018] During the actual working process of the butterfly valve of the utility model, the contact between the butterfly plate and the sealing annular airbag can be minimized, reducing the possibility of static electricity generation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model and should not be regarded as limiting the scope. For those of ordinary skill in the art, other relevant drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 is a schematic structural diagram of the present utility model;

[0021] Figure 2 is a structural block diagram of the present utility model.

[0022] 1. Valve body; 2. Valve seat; 3. Servo motor; 4. Butterfly plate; 5. Sealing annular airbag; 6. Connecting pipe; 7. Main controller; 8. First wireless module; 9. Second wireless module; 10. Microcontroller; 11. Relay module; 12. First servo motor controller; 13. Pressure sensor; 14. First voltage comparison circuit; 15. Second voltage comparison circuit; 16. Second servo motor controller; 17. First servo motor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0024] Accordingly, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0025] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not require further definition and explanation in subsequent drawings.

[0026] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present invention is usually placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0027] In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present invention, it should also be noted that unless otherwise clearly defined and limited, the terms "set", "installed", "connected", "connected to" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0029] A fire and static electricity prevention butterfly valve, as Figure 1 shown, includes a valve body 1, a butterfly plate 4 rotatably arranged in the valve body 1, a valve seat 2 fixedly connected to the valve body 1, a valve stem rotatably connected in the valve seat 2 and fixedly connected to the butterfly plate 4, and a servo motor 3 fixedly connected to the valve seat 2 and coaxially drivingly connected to the valve stem. The surfaces of the butterfly plate 4, the valve body 1, and the valve seat 2 are successively coated with a fireproof coating and a UV-cured resin antistatic coating;

[0030] It also includes a sealed annular airbag 5 fixedly connected to the inner ring of the valve body 1. There is a gap between the butterfly plate 4 and the inner ring of the valve body 1. The sealed annular airbag 5 is located between the outer ring of the butterfly plate 4 and the inner ring of the valve body 1. The sealed annular airbag 5 has a deflated state and an inflated state. When the sealed annular airbag 5 is in the deflated state, the thickness of the sealed annular airbag 5 is less than the gap between the butterfly plate 4 and the valve body 1. When the sealed annular airbag 5 is in the inflated state, the thickness of the sealed annular airbag 5 is greater than the gap between the butterfly plate 4 and the valve body 1. The sealed annular airbag 5 is connected to a connecting pipe 6 arranged through the valve body 1. The connecting pipe 6 is connected to an air pump, and the air pump includes a servo motor 17.

[0031] As Figure 2 shown, it also includes a microcontroller 10, a servo motor controller 12, a pressure sensor 13, and a relay module 11. The servo motor controller 12 is connected to the power supply through the relay module 11. The controlled end of the relay module 11 is coupled to the output end of the microcontroller 10. The output end of the microcontroller 10 is coupled to the input end of the servo motor controller 12. The output end of the servo motor controller 12 is coupled to the input end of the servo motor 17. The detection end of the pressure sensor 13 is connected to the inside of the connecting pipe 6. The output end of the pressure sensor 13 is coupled to the input end of the microcontroller 10. The pressure sensor 13 collects the air pressure inside the connecting pipe 6 and sends out an air pressure signal.

[0032] It also includes a voltage comparison circuit 14, a voltage comparison circuit 15, and a servo motor controller 16. The input ends of the voltage comparison circuit 14 and the voltage comparison circuit 15 are both coupled to the pressure sensor 13. The output ends of the voltage comparison circuit 14 and the voltage comparison circuit 15 are both coupled to the input end of the servo motor controller 16. The servo motor controller 16 is coupled to the servo motor 3. The reference air pressure signal 1 in the voltage comparison circuit 14 is greater than the reference air pressure signal 2 in the voltage comparison circuit 15. The voltage comparison circuit 14 responds to the air pressure signal and sends out an air pressure detection signal 1 when the air pressure signal is greater than the reference air pressure signal 1. The voltage comparison circuit 15 responds to the air pressure signal and sends out an air pressure detection signal 2 when the air pressure signal is less than the reference air pressure signal 2. Both the voltage comparison circuit 14 and the voltage comparison circuit 15 include a voltage comparator and several resistors.

[0033] It also includes a main controller 7, a wireless module 8, and a wireless module 9. The main controller 7 is coupled to the wireless module 8. The wireless module 8 and the wireless module 9 are wirelessly communicatively connected. The wireless module 9 is coupled to the microcontroller 10 and the servo motor controller 16. Both the main controller 7 and the microcontroller 10 are stm32 single-chip microcomputers. Both the wireless module 8 and the wireless module 9 are ESP8266 chips.

[0034] When the utility model is actually working, an instruction is sent out by the main controller 7, and remote communication is carried out through the wireless module 1 8 and the wireless module 2 9, and the instruction is transmitted to the microcontroller 10 and the servo motor 3 controller. After receiving the instruction, the microcontroller 10 controls the relay module 11 to be powered on, so that a path is maintained among the air pump, the relay module 11 and the power supply. The servo motor 1 17 is powered on, and the air pump can also be powered on to work. At this time, the microcontroller 10 also controls the servo motor 1 17 to rotate forward through the servo motor controller 1 12, so that the air pump pumps air, and the air in the sealed annular airbag 5 is pumped away, so that it switches from the bulging state to the deflated state, and the sealed annular airbag 5 can no longer obstruct the outer ring of the butterfly plate 4. Until the air pressure sensor 13 detects that the air pressure in the connecting pipe 6 is relatively low, the air pressure sensor 13 generates an air pressure signal to the voltage comparison circuit 1 14 and the voltage comparison circuit 2 15. The voltage comparison circuit 2 15 therein is used to judge whether the air pressure is less than the threshold value, that is, an air pressure detection signal 2 is sent out when the air pressure signal is less than the reference air pressure signal 2 in the voltage comparison circuit 2 15. After receiving the instruction from the wireless module 2 9 and the air pressure detection signal 2 at the same time, the servo motor controller 2 16 controls the servo motor 2 3 to rotate, and then drives the butterfly plate 4 to rotate. And during this process, the rotation of the butterfly plate 4 will not rub against the sealed annular airbag 5, avoiding the occurrence of static electricity. When the butterfly plate 4 needs to close the valve body 1 again, the main controller 7 transmits an instruction to the microcontroller 10 through the wireless module 1 8 and the wireless module 2 9. The microcontroller 10 controls the servo motor 1 17 to rotate reversely through the servo motor controller 1 12, so that the air pump performs an inflation action, and the sealed annular airbag 5 bulges into a bulging state. At this time, the air pressure sensor 13 also generates an air pressure signal. Finally, it is judged by the voltage comparison circuit 1 14 whether the air pressure is greater than the threshold value, that is, an air pressure detection signal 1 is sent out when the air pressure signal is greater than the reference air pressure signal 1 in the voltage comparison circuit 1 14. The servo motor controller 2 16 can then control the servo motor 2 3 to drive the butterfly plate 4 to rotate reversely, so that the butterfly plate 4 blocks the valve body 1. During the actual working process of this butterfly valve, the contact between the butterfly plate 4 and the sealed annular airbag 5 can be minimized, and the possibility of static electricity occurrence can be reduced.

[0035] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. Fireproof and anti-static butterfly valve, characterized by: The valve comprises a valve body (1), a butterfly plate (4) rotatably arranged in the valve body (1), a valve seat (2) fixedly connected to the valve body (1), a valve stem rotatably connected in the valve seat (2) and fixedly connected to the butterfly plate (4), and a servo motor (3) fixedly connected to the valve seat (2) and coaxially connected to the valve stem; It also includes a sealing annular airbag (5) fixedly connected to the inner ring of the valve body (1), a gap exists between the butterfly plate (4) and the inner ring of the valve body (1), the sealing annular airbag (5) is located between the outer ring of the butterfly plate (4) and the inner ring of the valve body (1), the sealing annular airbag (5) exists in a deflated state and a bulged state, when the sealing annular airbag (5) is in the deflated state, the thickness of the sealing annular airbag (5) is smaller than the gap between the butterfly plate (4) and the valve body (1), when the sealing annular airbag (5) is in the bulged state, the thickness of the sealing annular airbag (5) is greater than the gap between the butterfly plate (4) and the valve body (1).

2. The fireproof and antistatic butterfly valve according to claim 1 is characterized in that: The sealing annular airbag (5) is connected to a connecting pipe (6) which is arranged to penetrate the valve body (1), and the connecting pipe (6) is connected to an air pump, and the air pump includes a servo motor (17).

3. The fireproof and antistatic butterfly valve according to claim 2 is characterized in that: It also includes a microcontroller (10), a servo motor controller (12), and a relay module (11), wherein the servo motor controller (12) is connected to a power supply via the relay module (11), a controlled end of the relay module (11) is coupled to an output end of the microcontroller (10), the output end of the microcontroller (10) is coupled to an input end of the servo motor controller (12), and the output end of the servo motor controller (12) is coupled to an input end of a servo motor (17).

4. The fireproof and antistatic butterfly valve according to claim 3 is characterized in that: It also includes an air pressure sensor (13), the detection end of the air pressure sensor (13) is connected to the connecting tube (6), the output end of the air pressure sensor (13) is coupled to the input end of the microcontroller (10), and the air pressure sensor (13) collects the air pressure in the connecting tube (6) and sends out an air pressure signal.

5. The fireproof and antistatic butterfly valve according to claim 4 is characterized in that: The invention also comprises a voltage comparison circuit 1 (14), a voltage comparison circuit 2 (15), and a servo motor controller 2 (16). The input ends of the voltage comparison circuit 1 (14) and the voltage comparison circuit 2 (15) are coupled to the air pressure sensor (13). The output ends of the voltage comparison circuit 1 (14) and the voltage comparison circuit 2 (15) are coupled to the input end of the servo motor controller 2 (16). The servo motor controller 2 (16) is coupled to the servo motor 2 (3). The reference air pressure signal 1 in the voltage comparison circuit 1 (14) is greater than the reference air pressure signal 2 in the voltage comparison circuit 2 (15). The voltage comparison circuit 1 (14) responds to the air pressure signal and sends out an air pressure detection signal 1 when the air pressure signal is greater than the reference air pressure signal 1. The voltage comparison circuit 2 (15) responds to the air pressure signal and sends out an air pressure detection signal 2 when the air pressure signal is less than the reference air pressure signal 2.

6. The fireproof and antistatic butterfly valve according to claim 5 is characterized in that: The voltage comparison circuit 1 (14) and the voltage comparison circuit 2 (15) both include a voltage comparator and a plurality of resistors.

7. The fireproof and antistatic butterfly valve according to claim 5 is characterized in that: The invention also comprises a main controller (7), a wireless module 1 (8) and a wireless module 2 (9), wherein the main controller (7) is coupled to the wireless module 1 (8), the wireless module 1 (8) and the wireless module 2 (9) are wirelessly connected, and the wireless module 2 (9) is coupled to the microcontroller (10) and the servo motor controller 2 (16).

8. The fireproof and antistatic butterfly valve according to claim 7 is characterized in that: The main controller (7) and the microcontroller (10) are both stm32 single-chip microcomputers, and the wireless module one (8) and the wireless module two (9) are both ESP8266 chips.

9. The fireproof and antistatic butterfly valve according to claim 1 is characterized in that: The surfaces of the butterfly plate (4), the valve body (1) and the valve seat (2) are coated with fire retardant paint and UV curing resin antistatic coating in sequence.

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