Straight stroke pneumatic control gate valve

Abstract

The application relates to a straight-stroke pneumatic control gate valve, relates to the field of valve devices, and comprises a valve body, a gate plate and a pneumatic actuator, the gate plate is installed in the valve body in a lifting adjusting mode, the pneumatic actuator is fixedly installed on the valve body, a piston rod of the pneumatic actuator is fixedly connected with a valve rod in the valve body, and a signal input end of the pneumatic actuator is in control connection with a signal output end of an electric control cabinet. The application can improve the convenience of opening and closing the gate plate of the gate valve by technical personnel.

Description

Technical Field

[0001] This application relates to the field of valve devices, and more particularly to a linear pneumatic control gate valve. Background Technology

[0002] Gate valves, as a common fluid control component, are widely used in industrial fields such as water conservancy and metallurgy.

[0003] In the prior art, common gate valve products have a valve stem nut handwheel structure. The gate head is designed with a T-slot and fitted with a valve stem nut. The valve stem drives the valve stem nut to move linearly through the rotation of the handwheel, which in turn drives the gate to move up and down, thus realizing the function of opening or closing the valve.

[0004] However, manual gate valves typically require significant opening and closing force, necessitating manual operation. This can be particularly challenging for larger diameter gate valves. Especially in production environments requiring frequent opening and closing, manual operation can be cumbersome, time-consuming, and labor-intensive. Furthermore, the operation of manual gate valves requires on-site technical personnel, which can be inconvenient for equipment installed in high or difficult-to-access locations. Utility Model Content

[0005] To improve the ease of opening or closing gate valves for technicians, this application provides a linear pneumatic control gate valve.

[0006] The linear pneumatic control gate valve provided in this application adopts the following technical solution:

[0007] A linear-stroke pneumatically controlled gate valve includes a valve body, a gate, and a pneumatic actuator. The gate is adjustable and height-mounted within the valve body. The pneumatic actuator is fixedly mounted on the valve body, and its piston rod is fixedly connected to the valve stem within the valve body. The signal input terminal of the pneumatic actuator is connected to the signal output terminal of the electrical control cabinet.

[0008] By adopting the above technical solution, technicians can remotely control the pneumatic actuator through the electrical control cabinet to control the opening and closing of the gate valve via the piston rod. This facilitates remote control of the gate valve by technicians, making the operation of opening and closing the gate valve more time-saving, labor-saving, and efficient.

[0009] Preferably, the pneumatic actuator includes a cylinder, a limit switch, a filter pressure reducing valve, and a solenoid valve. The cylinder body is fixedly mounted on the top of the valve body, and the piston shaft of the cylinder is fixedly connected to the valve stem inside the valve body. The inlet end of the filter pressure reducing valve is connected to an air source, and the outlet end of the filter pressure reducing valve is connected to the solenoid valve and the cylinder through a three-way valve. The signal input ends of the solenoid valve and the limit switch are connected to the signal output end of the electrical control cabinet.

[0010] By adopting the above technical solution, the required opening and closing speed of the valve is adjusted through a filter pressure reducing valve, and impurities and moisture in the control air entering the cylinder are eliminated. The movement direction of the piston rod in the pneumatic actuator is controlled by a solenoid valve, and the valve stem of the gate valve only performs lifting and lowering movements. The stroke of the valve stem is controlled by a limit switch, achieving stepless adjustment of the stroke.

[0011] Preferably, the valve body is equipped with a position detection module for detecting the height position of the gate. The signal input terminal of the position detection module is connected to the control switch signal of the electrical control cabinet, and the signal output terminal of the position detection module is connected to the signal input terminal of the display on the electrical control cabinet.

[0012] By adopting the above technical solution, the rising height of the valve stem and gate can be monitored through the position detection module, which makes it convenient for operators to adjust the opening of the gate valve according to actual needs.

[0013] Preferably, the valve stem has a plurality of sensing slots along the axial direction, and the plurality of sensing slots are arranged in a linear array and uniformly distributed on the side wall of the valve stem.

[0014] A through hole is provided on the valve body, and a transparent cover plate for sealing the through hole is fixedly installed on the inner surface of the valve body. A mounting shell is fixedly connected to the outer wall of the valve body.

[0015] The position detection module includes:

[0016] An infrared ranging sensor is detachably installed in the mounting housing. The detection end is opposite to the valve stem through the transparent cover plate, and the signal input end is connected to the signal output end of the electrical control cabinet. It is used to detect the distance between the sensor and the valve stem surface and output a sensed distance signal.

[0017] The comparator chip is connected to the signal output terminal of the infrared ranging sensor and is used to receive the sensing distance signal and output a high-level signal when the sensing distance is greater than a set value.

[0018] The microcontroller has its signal input terminal connected to the comparator chip and the signal output terminal of the electrical control cabinet, and its signal output terminal connected to the signal input terminal of the display on the electrical control cabinet. It is used to receive the high-level signal and output the gate position signal based on the high-level signal.

[0019] By adopting the above technical solution, when technicians control the pneumatic actuator to open the gate valve through the electrical control cabinet, they can simultaneously control the infrared ranging sensor to start. During the valve stem's ascent, the sensing slots on the valve stem pass through the transparent cover and align with the sensing end of the infrared ranging sensor. When the sensing slots align with the infrared ranging sensor, the sensing distance measured by the infrared ranging sensor increases, and the comparator chip outputs a high-level signal. The microcontroller can determine the rising height of the valve stem and gate based on the number of occurrences of the high-level signal, and display the gate's position information on the display on the electrical control cabinet. This allows operators to easily control the opening degree of the gate valve based on the display.

[0020] Preferably, the side wall of the mounting shell is provided with a mounting opening and a receiving groove, and the mounting opening is located at the bottom of the receiving groove;

[0021] A board is detachably installed inside the mounting housing. The edge of the board is integrally formed with an installation edge, which is detachably installed in the receiving groove. The board extends into the inner cavity of the mounting housing through the installation port. The infrared ranging sensor is fixedly installed on the side of the board near the transparent cover.

[0022] A dustproof box is fixedly installed on the inner wall of the board, and the microcontroller and comparator chip are integrated and installed inside the dustproof box.

[0023] By adopting the above technical solution, the infrared ranging sensor, comparator chip, and microcontroller can be fixed and installed through the board.

[0024] In summary, the linear pneumatic control gate valve of this application has at least one of the following beneficial technical effects:

[0025] 1. With the pneumatic actuator, technicians can remotely control the pneumatic actuator through the electrical control cabinet to control the opening and closing of the gate plate inside the gate valve via the piston rod. This makes it easier for technicians to remotely control the opening and closing of the gate valve, making the operation of opening and closing the gate valve more time-saving, labor-saving and efficient.

[0026] 2. The position detection module can monitor the rising height of the valve stem and gate, making it easy for operators to adjust the opening of the gate valve according to actual needs. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of Embodiment 1 of this application used to illustrate the overall structure of the gate valve.

[0028] Figure 2 This is a schematic diagram of Embodiment 2 of this application, used to illustrate the overall structure of the position detection module.

[0029] Explanation of reference numerals in the attached drawings: 1. Valve body; 11. Through hole; 12. Transparent cover; 2. Gate; 3. Pneumatic actuator; 31. Cylinder; 32. Limit switch; 33. Solenoid valve; 34. Filter pressure reducing valve; 4. Valve stem; 41. Sensing slot; 5. Mounting housing; 51. Mounting port; 52. Receiving slot; 6. Infrared ranging sensor; 7. Circuit board; 71. Dustproof box; 8. Electrical control cabinet. Detailed Implementation

[0030] The following combination Figures 1-2 This application will be described in further detail.

[0031] Example 1

[0032] This application discloses a linear-stroke pneumatically controlled gate valve. (Refer to...) Figure 1 It includes a valve body 1, a gate 2, and a pneumatic actuator 3. The gate 2 is adjustable and installed inside the valve body 1. The pneumatic actuator 3 is fixedly installed on the valve body 1. The piston rod of the pneumatic actuator 3 is fixedly connected to the valve stem 4 inside the valve body 1. The signal input terminal of the pneumatic actuator 3 is connected to the signal output terminal of the electrical control cabinet 8.

[0033] With the pneumatic actuator 3, technicians can remotely control the pneumatic actuator 3 to control the opening and closing of the gate 2 inside the gate valve through the piston rod via the electrical control cabinet. This makes it easier for technicians to remotely control the opening and closing of the gate valve, making the operation of opening and closing the gate valve more time-saving, labor-saving, and efficient.

[0034] Reference Figure 1 The pneumatic actuator 3 includes a cylinder 31, a limit switch 32, a filter pressure reducing valve 34, and a solenoid valve 33. The cylinder body of the cylinder 31 is fixedly installed on the top of the valve body 1. The piston shaft of the cylinder 31 is fixedly connected to the valve stem 4 inside the valve body 1. The air inlet of the filter pressure reducing valve is connected to the air source. The air outlet of the filter pressure reducing valve is connected to the solenoid valve 33 and the cylinder 31 through a three-way valve. The signal input terminals of the solenoid valve 33 and the limit switch 32 are connected to the signal output terminals of the electrical control cabinet.

[0035] The required opening and closing speed of the valve is adjusted by a filter pressure reducing valve, which also eliminates impurities and moisture from the control air entering the cylinder 31. The direction of movement of the piston rod in the pneumatic actuator 3 is controlled by the solenoid valve 33, and the valve stem 4 of the gate valve only moves up and down. The stroke of the valve stem 4 is controlled by the limit switch 32, achieving stepless adjustment of the stroke.

[0036] The implementation principle of a linear pneumatic control gate valve in this application embodiment is as follows: Through the pneumatic actuator 3, technicians can remotely control the pneumatic actuator 3 to control the opening and closing of the gate plate 2 inside the gate valve through the piston rod via the electrical control cabinet. This facilitates remote control of the gate valve by technicians, making the operation of opening and closing the gate valve more time-saving, labor-saving, and efficient.

[0037] Example 2

[0038] In this embodiment, a position detection module for detecting the height position of the gate 2 is installed on the valve body 1. The signal input terminal of the position detection module is connected to the control switch signal of the electrical control cabinet, and the signal output terminal of the position detection module is connected to the signal input terminal of the display on the electrical control cabinet.

[0039] The position detection module can monitor the rising height of valve stem 4 and gate 2, making it easy for operators to adjust the opening of the gate valve according to actual needs.

[0040] Reference Figure 2 The valve stem 4 has a plurality of sensing slots 41 axially arranged on its body, and the plurality of sensing slots 41 are arranged in a linear array evenly on the side wall of the valve stem 4; the valve body 1 has a through hole 11, and a transparent cover plate 12 for sealing the through hole 11 is fixedly installed on the inner surface of the valve body 1, and an installation shell 5 is fixedly connected to the outer side wall of the valve body 1.

[0041] The position detection module includes: an infrared ranging sensor 6, which is detachably installed in the mounting housing 5. Its detection end is opposite to the valve stem 4 through a transparent cover plate 12, and its signal input end is connected to the signal output end of the electrical control cabinet. It is used to detect the distance between the sensor and the surface of the valve stem 4 and output a sensed distance signal; a comparator chip, which is connected to the signal output end of the infrared ranging sensor 6. It is used to receive the sensed distance signal and output a high-level signal when the sensed distance is greater than a set value; and a microcontroller, whose signal input end is connected to the comparator chip and the signal output end of the electrical control cabinet, and whose signal output end is connected to the signal input end of the display on the electrical control cabinet. It is used to receive the high-level signal and output the position signal of the gate 2 based on the high-level signal.

[0042] It should be noted that in this embodiment, the transparent cover is made of glass, and the infrared ranging sensor is a short-wave infrared ranging sensor, which has good penetration performance in transparent glass.

[0043] When technicians control the pneumatic actuator 3 to open the gate valve through the electrical control cabinet, they can simultaneously control the infrared ranging sensor 6 to start. During the rise of the valve stem 4, the sensing slots 41 on the valve stem 4 pass through the transparent cover plate 12 one by one and face the sensing end of the infrared ranging sensor 6. When the sensing slots 41 face the infrared ranging sensor 6, the sensing distance measured by the infrared ranging sensor 6 increases, and the comparator chip outputs a high-level signal. The microcontroller can determine the rising height of the valve stem 4 and the gate 2 based on the number of occurrences of the high-level signal, and display the position information of the gate 2 on the display on the electrical control cabinet. This allows the operator to control the opening degree of the gate valve based on the display.

[0044] Reference Figure 2The mounting housing 5 has a mounting opening 51 and a receiving groove 52 on its side wall. The mounting opening 51 is located at the bottom of the receiving groove 52. A circuit board 7 is detachably installed inside the mounting housing 5. The edge of the circuit board 7 is integrally formed with a mounting edge, which is detachably installed in the receiving groove 52. The circuit board 7 extends into the inner cavity of the mounting housing 5 through the mounting opening 51. The infrared ranging sensor 6 is fixedly installed on the side of the circuit board 7 near the transparent cover plate 12. A dustproof box 71 is fixedly installed on the inner side wall of the circuit board 7. The microcontroller and comparator chip are integrated and installed in the dustproof box 71. The circuit board 7 enables the fixing and installation of the infrared ranging sensor 6, the comparator chip, and the microcontroller.

[0045] It should be noted that in this embodiment, Bluetooth is integrated into the dust box 71, and the microcontroller connects wirelessly to the electrical control cabinet via Bluetooth.

[0046] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A linear-stroke pneumatic control gate valve, characterized in that, The device includes a valve body (1), a gate (2), and a pneumatic actuator (3). The gate (2) is adjustable in height and is installed inside the valve body (1). The pneumatic actuator (3) is fixedly installed on the valve body (1). The piston rod of the pneumatic actuator (3) is fixedly connected to the valve rod (4) inside the valve body (1). The signal input terminal of the pneumatic actuator (3) is connected to the signal output terminal of the electrical control cabinet (8). The valve body (1) is equipped with a position detection module for detecting the height position of the gate (2). The signal input terminal of the position detection module is connected to the control switch signal of the electrical control cabinet, and the signal output terminal of the position detection module is connected to the signal input terminal of the display on the electrical control cabinet. The valve stem (4) has a plurality of sensing slots (41) axially arranged on its body, and the plurality of sensing slots (41) are arranged in a linear array on the side wall of the valve stem (4). A through hole (11) is provided on the valve body (1), and a transparent cover plate (12) for sealing the through hole (11) is fixedly installed on the inner surface of the valve body (1). A mounting shell (5) is fixedly connected to the outer wall of the valve body (1). The position detection module includes: The infrared ranging sensor (6) is detachably installed in the mounting housing. The detection end is opposite to the valve stem (4) through the transparent cover plate (12). The signal input end is connected to the signal output end of the electrical control cabinet. It is used to detect the distance between the sensor and the surface of the valve stem (4) and output the sensing distance signal. The comparator chip is connected to the signal output terminal of the infrared ranging sensor (6) and is used to receive the sensing distance signal and output a high-level signal when the sensing distance is greater than the set value. The microcontroller has its signal input terminal connected to the comparator chip and the signal output terminal of the electrical control cabinet, and its signal output terminal connected to the signal input terminal of the display on the electrical control cabinet. It is used to receive the high-level signal and output the position signal of the gate (2) based on the high-level signal. The mounting shell has an installation port (51) and a receiving groove (52) on its side wall, and the installation port (51) is located at the bottom of the receiving groove (52). The mounting housing has a detachable plate (7) installed inside. The edge of the plate (7) is integrally formed with an installation edge. The installation edge is detachably installed in the receiving groove (52). The plate (7) extends into the inner cavity of the mounting housing through the installation port (51). The infrared ranging sensor (6) is fixedly installed on the side of the plate (7) near the transparent cover plate (12). A dustproof box (71) is fixedly installed on the inner wall of the board (7), and the microcontroller and comparator chip are integrated and installed in the dustproof box (71).

2. The linear pneumatic control gate valve according to claim 1, characterized in that, The pneumatic actuator (3) includes a cylinder (31), a limit switch (32), a filter pressure reducing valve (34), and a solenoid valve (33). The cylinder body of the cylinder (31) is fixedly installed on the top of the valve body (1). The piston shaft of the cylinder (31) is fixedly connected to the valve stem (4) inside the valve body (1). The air inlet of the filter pressure reducing valve is connected to the air source. The air outlet of the filter pressure reducing valve is connected to the solenoid valve (33) and the cylinder (31) through a three-way valve. The signal input terminals of the solenoid valve (33) and the limit switch (32) are connected to the signal output terminal of the electrical control cabinet.

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