Pneumatic delay control device and gas drainage pipeline pneumatic timing slag and water discharging device

Abstract

According to the pneumatic time-delay control device and the gas drainage pipeline pneumatic timing deslagging water drainage device, an air source of the pneumatic time-delay control device inflates a first buffering air cylinder through a first two-position five-way valve, when air pressure in the first buffering air cylinder reaches a set value, the first two-position five-way valve is converted into a left-position function, and when the air pressure in the first buffering air cylinder reaches a set value, the first two-position five-way valve is switched into a right-position function; gas in the first buffer gas cylinder is released, the gas source applies pneumatic pressure to the execution assembly through the first two-position five-way valve, meanwhile, the gas source inflates the second buffer gas cylinder through the first two-position five-way valve, when the gas pressure of the second buffer gas cylinder reaches a set value, the first two-position five-way valve is converted into a right-position function, gas in the second buffer gas cylinder is released, and the second buffer gas cylinder inflates the execution assembly through the second two-position five-way valve. And the pneumatic pressure on the execution assembly is relieved, and meanwhile the air source inflates the first buffer air bottle. The device is of a pure mechanical structure, does not need a power supply, achieves accurate delay control through pneumatic operation, can operate for a long time in explosive dust and gas dangerous environments, and has high reliability and stability.

Description

Technical Field

[0001] The present invention relates to the technical field of delay control, and in particular to a pneumatic delay control device and a pneumatic timing slag and water drainer for a gas drainage pipeline. Background Art

[0002] With the continuous improvement of industrial automation, higher requirements are put forward for the precise control and time delay control of various actions in the production process. For example, in an automated production line, it is necessary to control the time interval between different processes to ensure product quality and production efficiency. The pneumatic delay device uses compressed air as the power source and does not require the use of electricity. Explosive dust and gas hazardous environments are usually accompanied by harsh conditions such as high temperature, humidity, and corrosion. The use of electrical energy may generate ignition sources such as electric sparks, leading to explosion accidents. The pneumatic delay device has good corrosion resistance and adaptability and can work stably in such an environment. Compared with electronic devices, the pneumatic delay device is not easily affected by factors such as humidity and corrosion, reducing the possibility of equipment failure caused by environmental factors, ensuring normal operation in special environments, and essentially improving the safety of use.

[0003] There is a large amount of accumulated water and sediment in the coal mine gas pipeline drainage system, which often causes pipeline blockage, poor drainage, increases the system negative pressure, increases the torque of the drainage motor, and greatly reduces the drainage efficiency, seriously threatening safety in production. At present, there are manual water drainers, mechanical automatic water drainers, and electric water drainers in the coal mine gas pipeline drainage system. The manual water drainer has low automation, high labor intensity, and cannot achieve the purpose of real-time slag and water drainage. The mechanical automatic water drainer is the most commonly used device at present. Due to its pure mechanical structure, the inlet and outlet check valves are often blocked by large coal slag particles and cannot drain slag and water normally. The internal reversing valve group is also often easily stuck by coal mud and coal slag, requiring frequent maintenance by coal mine workers, increasing maintenance costs, and affecting the normal operation of the gas drainage system. The electric water drainer requires power supply to control the switching of the valve group to realize the inlet and outlet water drainage of the water drainer. Since the coal mine underground is a coal and gas explosive hazardous environment, the gas pipeline drainage system has extremely strict requirements for the explosion-proof performance of electrical equipment. Therefore, the electric water drainer is prone to safety hazards in the coal mine gas pipeline drainage system and its application is restricted by many factors. Summary of the Invention

[0004] The present invention provides a pneumatic delay control device and a pneumatic timing slag and water drainer for a gas drainage pipeline. It is a pure mechanical structure without a power supply, realizes precise delay control through pneumatic means, can operate for a long time in an explosive dust and gas hazardous environment, and has high reliability and stability.

[0005] The technical solution of the present invention is realized as follows: A pneumatic delay control device includes a gas source, a first delay component, a second delay component, and an execution component;

[0006] The first delay component includes a first two-position five-way valve, a first buffer gas cylinder, and a first two-position three-way valve. The first two-position five-way valve is initially in the right-position function. The air source inflates the first buffer gas cylinder through the first two-position five-way valve. The first buffer gas cylinder is connected to the pneumatic control end of the first two-position three-way valve. When the air pressure in the first buffer gas cylinder reaches the set value, the left-position function of the first two-position three-way valve is converted to the right-position function. The air inlet of the right-position function of the first two-position three-way valve is connected to the air source, and the air outlet is connected to the pneumatic right control end of the first two-position five-way valve. The air source causes the first two-position five-way valve to be converted to the left-position function through the first two-position three-way valve, and then the gas in the first buffer gas cylinder is released through the first two-position five-way valve;

[0007] The second delay component includes a second buffer gas cylinder and a second two-position three-way valve. When the first two-position five-way valve is converted to the left-position function, the air source applies pneumatic pressure to the actuator assembly through the first two-position five-way valve. At the same time, the air source inflates the second buffer gas cylinder through the first two-position five-way valve. The second buffer gas cylinder is connected to the pneumatic control end of the second two-position three-way valve. When the air pressure of the second buffer gas cylinder reaches the set value, the left-position function of the second two-position three-way valve is converted to the right-position function. The air inlet of the right-position function of the second two-position three-way valve is connected to the air source, and the air outlet is connected to the pneumatic left control end of the first two-position five-way valve. The air source causes the first two-position five-way valve to be converted to the right-position function through the second two-position three-way valve, releases the gas in the second buffer gas cylinder, relieves the pneumatic pressure on the actuator assembly, and at the same time, the air source inflates the first buffer gas cylinder.

[0008] Further, the actuator assembly includes a plurality of second two-position five-way valves. The second two-position five-way valves are connected to pneumatic actuators, and the pneumatic control ends of the second two-position five-way valves are connected to the air outlet holes of the left-position function of the first two-position five-way valve; when the air source applies pneumatic pressure to the actuator assembly, the second two-position five-way valves perform left-right position function conversion; after the pneumatic pressure on the actuator assembly is relieved, the second two-position five-way valves reset.

[0009] Further, a manual reversing valve is further provided between the first buffer gas cylinder and the first two-position three-way valve. The air inlet of the left-position function of the manual reversing valve is connected to the first buffer gas cylinder, the air inlet of the right-position function is connected to the air source, and the air outlet of the manual reversing valve is connected to the pneumatic control end of the first two-position three-way valve. When the air pressure in the first buffer gas cylinder reaches the set value, the first two-position three-way valve is converted to the right-position function through the air inlet and air outlet of the left-position function of the manual reversing valve.

[0010] Further, a first flowmeter is provided between the first two-position five-way valve and the first buffer gas cylinder. The air source inflates the first buffer gas cylinder through the first two-position five-way valve and the first flowmeter; a second flowmeter is provided between the first two-position five-way valve and the second buffer gas cylinder. The air source inflates the second buffer gas cylinder through the first two-position five-way valve and the second flowmeter.

[0011] Furthermore, it also includes a filter and a pressure gauge. Both the filter and the pressure gauge are connected to the gas source. The filter filters the gas source, and the pressure gauge is used to display the gas source pressure in real time.

[0012] Furthermore, the air outlet of the first buffer gas cylinder is connected to the air outlet of the right position function of the first two-position five-way valve through a first one-way valve, and the air outlet of the second buffer gas cylinder is connected to the air outlet of the left position function of the first two-position five-way valve through a second one-way valve; manual valves are provided on both the first buffer gas cylinder and the second buffer gas cylinder for releasing the condensed water in the corresponding buffer gas cylinder.

[0013] A pneumatic timing slag and water discharging device for a gas drainage pipeline includes the pneumatic delay control device described above.

[0014] Furthermore, the pneumatic timing slag and water discharging device for a gas drainage pipeline further includes a water collecting tank. An air-operated drain valve, an air-operated water inlet valve, and an air-operated air inlet valve are provided on the water collecting tank. The air-operated water inlet valve is connected to the gas pipeline. The air-operated drain valve, the air-operated water inlet valve, and the air-operated air inlet valve are all pneumatic actuators. The air-operated water inlet valve is connected to the left position function of the second two-position five-way valve, and the air-operated air inlet valve and the air-operated drain valve are connected to the right position function of the second two-position five-way valve. The gas source is connected to the air inlet of the second two-position five-way valve.

[0015] Advantages of the present invention:

[0016] The pneumatic delay control device of the present invention operates without electricity and completely adopts pneumatic control without electric drive, so it has high safety when used in explosive hazardous gas places. Compared with electronic devices, the pneumatic control delay device is not affected by factors such as electromagnetic interference, reducing the maintenance and repair costs caused by equipment failures, and at the same time reducing the personnel safety risks brought by equipment maintenance.

[0017] The pneumatic delay control device of the present invention can achieve precise timing of different states of pneumatic actuators to meet complex timing requirements; it can achieve precise delay control of single-group and multi-group actuators, with good scalability; it does not require complex explosion-proof treatment certification, which is convenient for users to use in explosive dust and gas hazardous places; it has precise pneumatic delay control, the delay time is adjustable, and the device is not affected by factors such as electromagnetic interference; in special emergency situations, when personnel intervene, the equipment can be started and stopped through a manual reversing valve.

[0018] The pneumatic timing slag and water discharging device for gas drainage pipeline of the present invention controls the opening and closing of the pneumatic valve through the pneumatic delay control device, realizes the timing slag and water discharging of the gas pipeline drainage system, and ensures the smoothness of the gas drainage system; it is suitable for the explosive dangerous environment of coal and gas mixture in coal mines and harsh environments such as high temperature, humidity, and corrosion. Due to the use of pneumatic control, it has good corrosion resistance, adaptability, and anti-interference ability, can work stably in harsh environments, avoid explosion accidents caused by electrical sparks, and essentially improves the safety of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0020] Figure 1 It is a schematic structural diagram of the pneumatic delay control device;

[0021] Figure 2 It is a schematic structural diagram of the pneumatic timing slag and water discharging device.

[0022] The first two-position five-way valve 1, the first buffer gas cylinder 2, the first two-position three-way valve 3, the air source 4, the second buffer gas cylinder 5, the second two-position three-way valve 6, the filter 7, the pressure gauge 8, the manual valve 9, the first flowmeter 10, the second flowmeter 11, the first one-way valve 12, the second one-way valve 13, the second two-position five-way valve 14, the pneumatic actuator 15, the manual reversing valve 16, the water collecting tank 17, the pneumatic drain valve 18, the pneumatic inlet valve 19, the pneumatic inlet valve 20, the gas pipeline 21, the pneumatic delay control device 22. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0024] Embodiment 1

[0025] As Figure 1 shown, a pneumatic delay control device includes an air source 4, a first delay component, a second delay component, and an execution component.

[0026] The first delay component includes a first five-port two-position valve 1, a first buffer gas cylinder 2, and a first three-port two-position valve 3. The initial position of the first five-port two-position valve 1 is the right-position function (the air inlet P is connected to the air outlet A, and the air outlet B is connected to the exhaust port S). The air inlet P of the first five-port two-position valve 1 is connected to the air source 4, the air outlet A is connected to the air inlet of the first buffer gas cylinder 2, and the exhaust port R is connected to the actuator assembly. The air source 4 fills the first buffer gas cylinder 2 through the air inlet P and the air outlet A of the first five-port two-position valve 1.

[0027] The first buffer gas cylinder 2 is connected to the pneumatic control end of the first three-port two-position valve 3. When the air pressure in the first buffer gas cylinder 2 reaches the set value, the air pressure in the first buffer gas cylinder 2 causes the left and right position functions of the first three-port two-position valve 3 to change. The air inlet P of the first three-port two-position valve 3 is connected to the air source 4, and the air outlet A is connected to the pneumatic right control end of the first five-port two-position valve 1. When the air pressure in the first buffer gas cylinder 2 reaches the set value, the air pressure in the first buffer gas cylinder 2 causes the left-position function (the air inlet R is connected to the air outlet A) of the first three-port two-position valve 3 to be converted to the right-position function (the air inlet P is connected to the air outlet A). The air source 4 pressure acts on the pneumatic right control end of the first five-port two-position valve 1 through the air inlet P and the air outlet A of the first three-port two-position valve 3, causing the first five-port two-position valve 1 to be converted to the left-position function (the air inlet P is connected to the air outlet B, and the air outlet A is connected to the exhaust port R). By driving the first five-port two-position valve 1 with the air source 4, the working responsiveness of the first five-port two-position valve 1 is better. The air outlet of the first buffer gas cylinder 2 is connected to the air outlet A of the first five-port two-position valve 1 through a first one-way valve 12, and the high-pressure gas in the first buffer gas cylinder 2 is released through the air outlet A and the exhaust port R of the first five-port two-position valve 1.

[0028] The second delay component includes a second buffer gas cylinder 5 and a second three-port two-position valve 6. The air outlet B of the first five-port two-position valve 1 is connected to the air inlet of the second buffer gas cylinder 5. When the first five-port two-position valve 1 is converted to the left-position function (the air inlet P is connected to the air outlet B), the air source 4 fills the second buffer gas cylinder 5 through the air inlet P and the air outlet B of the first five-port two-position valve 1, and at the same time, the air outlet B of the first five-port two-position valve 1 applies pneumatic pressure to the actuator assembly.

[0029] The second buffer gas cylinder 5 is connected to the pneumatic control end of the second two-position three-way valve 6. When the air pressure in the second buffer gas cylinder 5 reaches the set value, the air pressure in the second buffer gas cylinder 5 causes the left and right position functions of the second two-position three-way valve 6 to be switched. The air inlet P of the second two-position three-way valve 6 is connected to the air source 4, and the air outlet A is connected to the pneumatic left control end of the first two-position five-way valve 1. When the air pressure in the second buffer gas cylinder 5 reaches the set value, the air pressure in the second buffer gas cylinder 5 causes the left position function (the air inlet R is communicated with the air outlet A) of the second two-position three-way valve 6 to be switched to the right position function (the air inlet P is communicated with the air outlet A), and the air source 4 pressure acts on the pneumatic left control end of the first two-position five-way valve 1 through the air inlet P and the air outlet A of the second two-position three-way valve 6, causing the first two-position five-way valve 1 to be switched to the right position function (the air inlet P and the air outlet A are communicated). The air outlet of the second buffer gas cylinder 5 is connected to the air outlet B of the first two-position five-way valve 1 through the second one-way valve 13, and the high-pressure gas in the second buffer gas cylinder 5 is released through the air outlet B and the exhaust port S of the first two-position five-way valve 1, and at the same time, the pneumatic pressure on the actuator assembly is released, and the air source 4 fills the first buffer gas cylinder 2 through the air inlet P and the air outlet A of the first two-position five-way valve 1.

[0030] The air source 4 is also connected to the filter 7 and the pressure gauge 8. The filter 7 filters the air source 4 to prevent unclean gas from entering the pneumatic delay control device 22, and the pressure gauge 8 is used to display the pressure of the air source 4 in real time to ensure that the pneumatic system works within the effective air source 4 pressure range.

[0031] Manual valves 9 are connected to both the first buffer gas cylinder 2 and the second buffer gas cylinder 5. Periodically, by manually opening the valves, the condensed water in the corresponding buffer gas cylinder is released to ensure the reliable operation of the pneumatic system.

[0032] A first flow meter 10 is provided between the first two-position five-way valve 1 and the first buffer gas cylinder 2, and the air source 4 fills the first buffer gas cylinder 2 through the first two-position five-way valve 1 and the first flow meter 10. The first flow meter 10 can control the flow rate of the compressed air entering the first buffer gas cylinder 2. Let the volume of the first buffer gas cylinder 2 be V1, and the set flow rate of the first flow meter 10 be Q1, that is, the precise positioning time is T1 = V1÷Q1. The precise adjustment of the delay is achieved through the combination of the flow meter and the gas buffer bottle.

[0033] A second flow meter 11 is provided between the first two-position five-way valve 1 and the second buffer gas cylinder 5, and the air source 4 fills the second buffer gas cylinder 5 through the first two-position five-way valve 1 and the second flow meter 11. The second flow meter 11 can control the flow rate of the compressed air entering the second buffer gas cylinder 5. Let the volume of the second buffer gas cylinder 5 be V2, and the set flow rate of the second flow meter 11 be Q2, that is, the precise positioning time is T2 = V2÷Q2.

[0034] Embodiment 2

[0035] This embodiment is basically the same as Embodiment 1, except that: as Figure 1 shown, the execution component includes several second two-position five-way valves 14, which can be 1, 2 or more. The second two-position five-way valve 14 is connected to the pneumatic actuator 15, and the pneumatic control end of the second two-position five-way valve 14 is connected to the air outlet B of the first two-position five-way valve 1; when the air source 4 applies pneumatic pressure to the execution component through the air outlet B of the first two-position five-way valve 1, the second two-position five-way valve 14 performs left and right position function conversion; after the pneumatic pressure of the execution component is released, the second two-position five-way valve 14 resets. For example, if the second two-position five-way valve 14 is initially in the right position function (the air inlet P and the air outlet A are connected), when the first buffer gas cylinder 2 applies pneumatic pressure to the execution component, the right position function changes to the left position function (the air inlet P and the air outlet B are connected), and after the pneumatic pressure of the execution component is released, the second two-position five-way valve 14 resumes the right position function.

[0036] Embodiment 3

[0037] This embodiment is basically the same as Embodiment 1 or 2, except that: as Figure 1 shown, a manual reversing valve 16 is further connected between the first buffer gas cylinder 2 and the first two-position three-way valve 3. The left position function of the manual reversing valve 16 is that the air inlet R and the air outlet A are connected, and the right position function is that the air inlet P and the air outlet A are connected. The air inlet R of the left position function of the manual reversing valve 16 is connected to the first buffer gas cylinder 2, the air inlet P of the right position function is connected to the air source 4, and the air outlet A of the manual reversing valve 16 is connected to the pneumatic control end of the first two-position three-way valve 3.

[0038] When the air pressure of the first buffer gas cylinder 2 reaches the set value, the first two-position three-way valve 3 is converted to the right position function (the air inlet P is connected to the air outlet A) through the air inlet R and the air outlet A of the left position function of the manual reversing valve 16, and the air source 4 pressure acts on the pneumatic right control end of the first two-position five-way valve 1 through the air inlet P and the air outlet A of the first two-position three-way valve 3, so that the first two-position five-way valve 1 is converted to the left position function (the air inlet P and the air outlet B are connected, and the air outlet A and the exhaust hole R are connected).

[0039] In case of special circumstances, such as the air pressure of the first buffer gas cylinder 2 cannot make the first two-position three-way valve 3 be converted to the right position function, the manual reversing valve 16 is manually operated to change from the left position function to the right position function, the air inlet P and the air outlet A are connected, the air inlet P is connected to the air source 4, and the air source 4 acts on the pneumatic control end of the first two-position three-way valve 3 through the air inlet P and the air outlet A of the manual reversing valve 16, so that the first two-position three-way valve 3 is converted to the right position function.

[0040] Embodiment 4

[0041] As Figure 1 and 2As shown, a pneumatic timing slag and water discharging device for gas drainage pipeline includes the pneumatic delay control device 22 described in Embodiment 1, 2 or 3.

[0042] The pneumatic timing slag and water discharging device for gas drainage pipeline further includes a water collecting tank 17. An air-operated drain valve 18, an air-operated inlet valve 19 and an air-operated air inlet valve 20 are connected to the water collecting tank 17. The air-operated inlet valve 19 is connected to the gas pipeline 21. The air-operated drain valve 18, the air-operated inlet valve 19 and the air-operated air inlet valve 20 are all pneumatic actuators 15. The air-operated inlet valve 19 is connected to the air outlet B of the left position function of the second two-position five-way valve 14. The air-operated air inlet valve 20 and the air-operated drain valve 18 are connected to the air outlet A of the right position function of the second two-position five-way valve 14. The air source 4 is connected to the air inlet P of the second two-position five-way valve 14.

[0043] When the air source 4 applies pneumatic pressure to the pneumatic control end of the second two-position five-way valve 14 through the air inlet P and the air outlet B of the first two-position five-way valve 1, the second two-position five-way valve 14 changes from the right position function to the left position function, that is, the air inlet P of the second two-position five-way valve 14 communicates with the air outlet B, the air-operated inlet valve 19 opens, the air-operated air inlet valve 20 and the air-operated drain valve 18 close, and the coal slag and coal water in the gas pipeline 21 will flow into the water collecting tank 17 through the air-operated inlet valve 19. The gas pipeline 21 is a gas drainage pipeline and is in a negative pressure state. At this time, the water collecting tank 17 also forms a negative pressure environment. When the pneumatic pressure of the execution component is released, the second two-position five-way valve 14 resumes the right position function, that is, the air inlet P of the second two-position five-way valve 14 communicates with the air outlet A, the air-operated inlet valve 19 closes, the air-operated air inlet valve 20 and the air-operated drain valve 18 open. At this time, the gas pipeline 21 is cut off from the water collecting tank 17, and the atmospheric pressure enters the water collecting tank 17 through the air-operated air inlet valve 20, forming a positive pressure in the water collecting tank 17 in the original negative pressure state, and discharging the coal slag and coal water.

[0044] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pneumatic delay control device, comprising an air source, a first delay component, a second delay component and an actuator component; characterized in that: The first delay component includes a first two-position five-way valve, a first buffer gas cylinder and a first two-position three-way valve. The first two-position five-way valve is initially in the right position function. The gas source inflates the first buffer gas cylinder through the first two-position five-way valve. The first buffer gas cylinder is connected to the pneumatic control end of the first two-position three-way valve. When the gas pressure in the first buffer gas cylinder reaches a set value, the left position function of the first two-position three-way valve is converted to the right position function. The gas inlet of the right position function of the first two-position three-way valve is connected to the gas source, and the gas outlet is connected to the pneumatic right control end of the first two-position five-way valve. The gas source converts the first two-position five-way valve into the left position function through the first two-position three-way valve, and then the gas in the first buffer gas cylinder is released through the first two-position five-way valve; The second delay component includes a second buffer gas cylinder and a second two-position three-way valve. When the first two-position five-way valve is converted to the left position function, the gas source applies pneumatic pressure to the actuator through the first two-position five-way valve, and at the same time, the gas source inflates the second buffer gas cylinder through the first two-position five-way valve. The second buffer gas cylinder is connected to the pneumatic control end of the second two-position three-way valve. When the gas pressure of the second buffer gas cylinder reaches the set value, the left position function of the second two-position three-way valve is converted to the right position function, the air inlet of the right position function of the second two-position three-way valve is connected to the gas source, and the air outlet is connected to the pneumatic left control end of the first two-position five-way valve. The gas source converts the first two-position five-way valve to the right position function through the second two-position three-way valve, releases the gas in the second buffer gas cylinder, relieves the pneumatic pressure on the actuator, and at the same time, the gas source inflates the first buffer gas cylinder.

2. A pneumatic delay control device according to claim 1, characterized in that: The actuator assembly includes a plurality of second two-position five-way valves, which are connected to the pneumatic actuator, and the pneumatic control end of the second two-position five-way valve is connected to the air outlet of the left position function of the first two-position five-way valve; when the air source applies pneumatic pressure to the actuator assembly, the second two-position five-way valve switches the left and right positions; after the pneumatic pressure of the actuator assembly is released, the second two-position five-way valve is reset.

3. A pneumatic delay control device according to claim 1 or 2, characterized in that: A manual reversing valve is also arranged between the first buffer gas cylinder and the first two-position three-way valve. The air inlet of the left-position function of the manual reversing valve is connected to the first buffer gas cylinder, the air inlet of the right-position function is connected to the gas source, and the air outlet of the manual reversing valve is connected to the pneumatic control end of the first two-position three-way valve. When the air pressure of the first buffer gas cylinder reaches the set value, the first two-position three-way valve is converted to the right-position function through the air inlet and air outlet of the left-position function of the manual reversing valve.

4. A pneumatic delay control device according to claim 1 or 2, characterized in that: A first flow meter is arranged between the first two-position five-way valve and the first buffer gas cylinder, and the gas source inflates the first buffer gas cylinder through the first two-position five-way valve and the first flow meter.

5. A pneumatic delay control device according to claim 1 or 2, characterized in that: A second flow meter is arranged between the first two-position five-way valve and the second buffer gas cylinder, and the gas source inflates the second buffer gas cylinder through the first two-position five-way valve and the second flow meter.

6. A pneumatic delay control device according to claim 1, characterized in that: It also includes a filter and a pressure gauge, both of which are connected to the gas source. The filter filters the gas source, and the pressure gauge is used to display the gas source pressure in real time.

7. A pneumatic delay control device according to claim 1, characterized in that: The gas outlet of the first buffer gas cylinder is connected to the gas outlet of the right position function of the first two-position five-way valve through the first one-way valve, and the gas outlet of the second buffer gas cylinder is connected to the gas outlet of the left position function of the first two-position five-way valve through the second one-way valve; manual valves are provided on the first buffer gas cylinder and the second buffer gas cylinder for releasing condensed water in the corresponding buffer gas cylinders.

8. A pneumatic timed slag and water discharger for a gas extraction pipeline, characterized in that: It comprises the pneumatic delay control device as described in any one of claims 1 to 7.

9. A pneumatic timed slag and water discharger for a gas extraction pipeline according to claim 8, characterized in that: The pneumatic timed slag drainer of the gas extraction pipeline also includes a water collecting tank, on which are provided a pneumatic drain valve, a pneumatic water inlet valve and a pneumatic air inlet valve, the pneumatic water inlet valve being connected to the gas pipeline, the pneumatic drain valve, the pneumatic water inlet valve and the pneumatic air inlet valve being all pneumatic actuators, the pneumatic water inlet valve being connected to the left position function of the second two-position five-way valve, the pneumatic air inlet valve and the pneumatic drain valve being connected to the right position function of the second two-position five-way valve, and the air source being connected to the air inlet of the second two-position five-way valve.

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