阅读说明：本技术 气动隔膜泵的控制装置 (Control device of pneumatic diaphragm pump ) 是由 王荣生 李震 周剑锋 周斌 陈翰 张韬 林冰洁 裘湛 汪喜生 郭志义 宋超 于 2018-06-15 设计创作，主要内容包括：本发明提出一种气动隔膜泵的控制装置,包括：气源管道、气控阀、气动隔膜泵、气控计时器、开启气控开关和停止气控开关。气控阀为双控五通气控阀,包括气体输入端、第一气控端、第二气控端、第一气体输出端和第二气体输出端,气体输入端连接到气源管道。气动隔膜泵的控制端与气控阀的第一气体输出端连接。气控计时器的输入端与气控阀的第一气体输出端连接,气孔计时器的输出端与气控阀的第二气控端连接。开启气控开关的输入连接到气源管道,开启气控开关的输出连接到气控阀的第一气控端。停止气控开关的输入连接到气源管道,停止气控开关的输出连接到气控阀的第二气控端。该气动隔膜泵的控制装置结构简单,成本低廉,运行可靠。(The invention provides a control device of a pneumatic diaphragm pump, which comprises: the pneumatic control device comprises an air source pipeline, a pneumatic control valve, a pneumatic diaphragm pump, a pneumatic control timer, a starting pneumatic control switch and a stopping pneumatic control switch. The pneumatic control valve is a double-control five-way pneumatic control valve and comprises a gas input end, a first pneumatic control end, a second pneumatic control end, a first gas output end and a second gas output end, wherein the gas input end is connected to a gas source pipeline. The control end of the pneumatic diaphragm pump is connected with the first gas output end of the pneumatic control valve. The input end of the pneumatic control timer is connected with the first gas output end of the pneumatic control valve, and the output end of the air hole timer is connected with the second pneumatic control end of the pneumatic control valve. The input of the opening pneumatic control switch is connected to the air source pipeline, and the output of the opening pneumatic control switch is connected to the first pneumatic control end of the pneumatic control valve. The input of the stop pneumatic control switch is connected to the air source pipeline, and the output of the stop pneumatic control switch is connected to the second pneumatic control end of the pneumatic control valve. The control device of the pneumatic diaphragm pump is simple in structure, low in cost and reliable in operation.)

1. A control device for an air operated diaphragm pump, comprising:

a gas source conduit;

the pneumatic control valve is a double-control five-way pneumatic control valve and comprises a gas input end, a first pneumatic control end, a second pneumatic control end, a first gas output end and a second gas output end, and the gas input end is connected to the gas source pipeline;

the control end of the pneumatic diaphragm pump is connected with the first gas output end of the pneumatic control valve;

the input end of the pneumatic control timer is connected with the first gas output end of the pneumatic control valve, and the output end of the air hole timer is connected with the second pneumatic control end of the pneumatic control valve;

the method comprises the following steps of starting a pneumatic control switch, wherein the input of the starting pneumatic control switch is connected to an air source pipeline, and the output of the starting pneumatic control switch is connected to a first pneumatic control end of a pneumatic control valve;

and the input of the stop pneumatic control switch is connected to the air source pipeline, and the output of the stop pneumatic control switch is connected to the second pneumatic control end of the pneumatic control valve.

2. The control apparatus of an air operated diaphragm pump according to claim 1, wherein the air control valve comprises:

an inner cavity;

a slide valve that slides in the inner cavity;

the input cavity is communicated with the gas input end and the inner cavity;

the first control cavity is communicated with the first air control end and the inner cavity;

the second control cavity is communicated with the second air control end and the inner cavity;

the first output cavity is communicated with the first gas output end and the inner cavity;

and the second output cavity is communicated with the second gas output end and the inner cavity.

3. The control apparatus of an air operated diaphragm pump according to claim 2, wherein the slide valve is moved to an open position or a stop position in the inner chamber;

in the opening position, the sliding valve closes the second output cavity, and airflow input from the gas input end enters the first output cavity through the input cavity and the inner cavity and is output from the first gas output end;

at the stop position, the slide valve closes the first output cavity, and the airflow input from the gas input end enters the second output cavity through the input cavity and the inner cavity and is output from the second gas output end.

4. A control apparatus of an air operated diaphragm pump according to claim 3,

the opening pneumatic control switch is opened, airflow enters the first control cavity, and the sliding valve is pushed to an opening position;

and the stop pneumatic control switch is opened, and the air flow enters the second control cavity to push the sliding valve to the stop position.

5. The control apparatus of an air operated diaphragm pump according to claim 1,

and the input end of the pneumatic control timer inputs airflow, the pneumatic control timer starts working timing, the working timing is finished, the pneumatic control timer is conducted, and the output end of the pneumatic control timer outputs the airflow to the second control cavity to push the sliding valve to a stop position.

6. A control apparatus of an air operated diaphragm pump according to claim 5,

and the input end of the pneumatic control timer stops inputting airflow, the pneumatic control timer starts to reset and time, the resetting and time keeping are finished, and the pneumatic control timer is closed.

7. The control apparatus of an air operated diaphragm pump according to claim 5, wherein said air operated timer has a spring timing mechanism.

Technical Field

The invention relates to a sewage treatment technology, in particular to a control device of a pneumatic diaphragm pump for pumping water.

Background

The sludge treatment process in sewage comprises the steps of mixing fresh sludge and circulating sludge in a digestion tank through a screw pump, then putting the mixture into the digestion tank, heating and exchanging heat through a hot water boiler, controlling the temperature of the digestion tank to be about 35 ℃, hydrolyzing, acidifying and methanizing the sludge, decomposing organic matters under anaerobic conditions to generate methane, carbon dioxide oxygen, water and the like, and stabilizing the sludge.

In the process of conveying the medium-temperature biogas, excessive moisture is separated out in a liquid state in the gas conveying pipe due to the continuous reduction of the temperature. If a purification process is not adopted in the methane treatment process, the content of hydrogen sulfide in the methane is higher and can reach 50-100 PPM, and even after the optimized desulfurization process is carried out, the concentration of the hydrogen sulfide in the methane also reaches about 5-10 PPM. Hydrogen sulfide and carbon dioxide in the biogas are very soluble in water to form an acidic solution, and when the inner wall of a metal pipeline and gas equipment facilities such as a boiler and the like contact with the acidic solution, an electrochemical reaction is caused to cause metal corrosion. In order to remove water, a water condensation jar is arranged at the lowest point of the biogas pipe line, and precipitated liquid is collected in the water condensation jar. Due to the limited capacity of the condenser, the condensed water is required to be periodically drained from the condenser. If the condensed water is not discharged in time and accumulated, the drift diameter of a pipeline can be reduced, the operating pressure of the whole digestion system is slightly increased, and the hydraulic safety valve of the digestion tank is broken to cause the overflow of a large amount of methane in the digestion tank, so that the safe operation of the digestion system is seriously influenced.

Disclosure of Invention

The invention provides a control device of a pneumatic diaphragm pump, which comprises: the pneumatic control device comprises an air source pipeline, a pneumatic control valve, a pneumatic diaphragm pump, a pneumatic control timer, a starting pneumatic control switch and a stopping pneumatic control switch. The pneumatic control valve is a double-control five-way pneumatic control valve and comprises a gas input end, a first pneumatic control end, a second pneumatic control end, a first gas output end and a second gas output end, wherein the gas input end is connected to a gas source pipeline. The control end of the pneumatic diaphragm pump is connected with the first gas output end of the pneumatic control valve. The input end of the pneumatic control timer is connected with the first gas output end of the pneumatic control valve, and the output end of the air hole timer is connected with the second pneumatic control end of the pneumatic control valve. The input of the opening pneumatic control switch is connected to the air source pipeline, and the output of the opening pneumatic control switch is connected to the first pneumatic control end of the pneumatic control valve. The input of the stop pneumatic control switch is connected to the air source pipeline, and the output of the stop pneumatic control switch is connected to the second pneumatic control end of the pneumatic control valve.

Wherein, gas accuse valve includes: the device comprises an inner cavity, a sliding valve, an input cavity, a first control cavity, a second control cavity, a first output cavity and a second output cavity. The sliding valve slides in the inner cavity. The input cavity is communicated with the gas input end and the inner cavity. The first control cavity is communicated with the first air control end and the inner cavity. The second control cavity is communicated with the second pneumatic control end and the inner cavity. The first output cavity is communicated with the first gas output end and the inner cavity. The second output cavity is communicated with the second gas output end and the inner cavity.

Wherein the sliding valve moves in the inner cavity to an open position or a stop position. In the open position, the slide valve closes the second output cavity, and the airflow input from the gas input end enters the first output cavity through the input cavity and the inner cavity and is output from the first gas output end. At the stop position, the slide valve closes the first output cavity, and the airflow input from the gas input end enters the second output cavity through the input cavity and the inner cavity and is output from the second gas output end.

Wherein, open the gas accuse switch and open, the air current gets into first control chamber, promotes the slide valve to open the position. And the stop pneumatic control switch is opened, and the air flow enters the second control cavity to push the sliding valve to the stop position.

The input end of the pneumatic control timer inputs airflow, the pneumatic control timer starts working timing, the working timing is finished, the pneumatic control timer is conducted, and the output end of the pneumatic control timer outputs the airflow to the second control cavity to push the sliding valve to a stop position.

Wherein, the input of gas accuse timer stops the input air current, and gas accuse timer begins to reset the timing, and the time of resetting is over, and gas accuse timer closes.

Wherein the pneumatic controlled timer has a spring timing mechanism.

The control device of the pneumatic diaphragm pump is simple in structure, low in cost and reliable in operation, and can effectively reduce labor intensity and improve working efficiency.

Drawings

Fig. 1 discloses a schematic diagram of the structure of the control device of the pneumatic diaphragm pump of the present invention.

Fig. 2 discloses a constructional schematic of an inoperative state of the air operated diaphragm pump.

Fig. 3 discloses a structural schematic diagram of the open state of the air operated diaphragm pump.

Fig. 4 discloses a schematic diagram of the structure of the stopped state of the air operated diaphragm pump.

Fig. 5 shows a schematic diagram of the automatic timer stop state of the air operated diaphragm pump.

Detailed Description

In order to reduce working strength and improve working efficiency, mechanical water pumping is required to replace manual water pumping. Because the methane belongs to flammable and explosive gas, the whole methane area belongs to a level 1 explosion-proof area, and a condensed water discharge point is a level 0 explosion-proof area, a motor which can generate electric sparks cannot be used as a driving mechanism for pumping water. In consideration of explosion-proof safety, an air operated diaphragm pump using gas as a power source is a preferable choice.

The pneumatic diaphragm pump can adopt a suitable type sold in the market, but a set of control device of the pneumatic diaphragm pump is also needed, and the working process of the pneumatic diaphragm pump is controlled according to specific field working conditions.

The invention provides a control device of a pneumatic diaphragm pump. Fig. 1 discloses a schematic diagram of the structure of the control device of the pneumatic diaphragm pump of the present invention. Referring to fig. 1, the control apparatus of the air operated diaphragm pump includes: the air source pipeline 11, the air control valve 12, the pneumatic diaphragm pump 13, the air control timer 14, the opening air control switch 15 and the stopping air control switch 16.

The air supply conduit 11 is connected to an external air supply to provide a source of air flow for the entire device.

The pneumatic control valve 12 is a double-control five-way pneumatic control valve. The pneumatic control valve 12 includes five input and output ports as follows: a gas input 121, a first gas control end 122, a second gas control end 123, a first gas output 124, and a second gas output 125. The gas input 121 is connected to the gas supply line 11. The internal structure of the pneumatic control valve 12 includes: inner chamber 126, slide valve 127, input chamber 171, first control chamber 172, second control chamber 173, first output chamber 174, and second output chamber 175. The slide valve 127 slides in the inner cavity 126. The input chamber 171 communicates the gas input 121 with the internal chamber 126. The first control chamber 172 communicates the first pneumatic end 122 with the inner chamber 126. The second control chamber 173 communicates the second pneumatic control end 123 with the internal chamber 126. The first output chamber 174 communicates the first gas output 124 with the internal chamber 126. The second output chamber 175 communicates the second gas output 125 with the internal chamber 126. A slide valve 127 moves within the interior chamber 126 to control the direction of air flow within the pneumatic control valve. The slide valve 126 may be moved to an open position or a stop position. In the open position, the slide valve 127 closes the second output chamber 175 and gas flow from the gas input 121 enters the first output chamber 174 through the input chamber 171, the internal chamber 126, and exits the first gas output 124. In the rest position, the slide valve 126 closes the first output chamber 174 and gas flow from the gas input 121 passes through the input chamber 171, through the internal chamber 126, into the second output chamber 175, and out the second gas output 125. The first gas output 124 of the pneumatic control valve 12 is a working output and the second gas output 125 is a blind end.

The control end of the pneumatic diaphragm pump 13 is connected to the first gas output 124 of the pneumatic control valve 12. The pneumatic diaphragm pump can be a model QBK-25F pneumatic diaphragm pump.

The input IN of the pneumatic controlled timer 14 is connected to the first pneumatic output 124 of the pneumatic controlled valve 12, and the output OUT of the pneumatic controlled timer 14 is connected to the second pneumatic control 123 of the pneumatic controlled valve 12. The pneumatic timer 14 may be a pneumatic timer of type fesot 10413. The timing interval is (10-200) × 5 seconds, and the reset time is 200 milliseconds. The pneumatic controlled timer 14 has a spring timing mechanism. The input end IN of the pneumatic control timer 14 inputs air flow, the pneumatic control timer 14 starts working timing, the working timing is finished, the pneumatic control timer is conducted, the input end IN and the output end OUT are conducted, and the air flow can flow from the input end IN to the output end OUT. The output OUT of the pneumatic timer 14 outputs an air flow to the second control terminal 123, which enters the second control chamber 173, pushing the slide valve 127 to the stop position. After the pneumatic control valve 12 is stopped, the input end IN of the pneumatic control timer 14 stops inputting the air flow, after the air flow is stopped, the pneumatic control timer 14 starts resetting and timing, the resetting and timing are finished, the pneumatic control timer 14 is closed, and the input end IN and the output end OUT are not conducted any more.

The input of the opening pneumatic control switch 15 is connected to the air source pipeline 11, and the output of the opening pneumatic control switch 15 is connected to the first pneumatic control end 122 of the pneumatic control valve 12. The opening pneumatic switch 15 may be a pneumatic on-off valve signaled as SMC VM 13. The open air control switch 15 is opened and air flows through the first air control port 122 into the first control chamber 172, urging the slide valve 127 to the open position.

The input of the stop pneumatic control switch 16 is connected to the air supply pipe 11, and the output of the stop pneumatic control switch 16 is connected to the second pneumatic control end 123 of the pneumatic control valve 12. The stop pneumatic switch 16 may employ a pneumatic on-off valve signaled as SMC VM 13. The stop pneumatic switch 16 is opened and air flows into the second control chamber 173 through the second pneumatic port 123, pushing the slide valve 127 to the stop position.

Fig. 2 discloses a constructional schematic of an inoperative state of the air operated diaphragm pump. In the non-working state, the opening pneumatic control switch 15 and the stopping pneumatic control switch 16 are both closed. The initial position of the slide valve 127 is the stop position. Gas supplied by the gas supply line 11 enters the input chamber 171 through the gas input 121. The input chamber 171 now communicates with the second output chamber 175 through the internal chamber 126, while the first output chamber 174 is closed by the slide valve 127. However, the second output 125 is blind and is not connected to other outputs, so that the pneumatic control valve 12 does not have a valid output at this time, and the pneumatic diaphragm pump 13 does not receive a gas input and is in a non-operating state.

Fig. 3 discloses a structural schematic diagram of the open state of the air operated diaphragm pump. In the on state, the on pneumatic control switch 15 is turned on, and the off pneumatic control switch 16 is turned off. When the open air control switch 15 is opened, air from the air supply line 11 enters the first control chamber 172 through the first air control port 122, urging the slide valve 127 to the open position. At this time, the input chamber 171 communicates with the first output chamber 174 through the inner chamber 126, and the second output chamber 175 is closed by the slide valve 127. The air flow output from the first output end 124 flows into the control end of the air operated diaphragm pump 13, and the air operated diaphragm pump 13 receives the air input to start operating. The output of the first output 124 also enters an input IN of the pneumatic controlled timer 14, as will be further described below IN conjunction with FIG. 5.

Fig. 4 discloses a schematic diagram of the structure of the stopped state of the air operated diaphragm pump. In the on state, the on pneumatic switch 15 is turned off, and the off pneumatic switch 16 is turned on. After the on-pneumatic switch 15 is closed and the off-pneumatic switch 16 is opened, the air flow from the air supply line 11 enters the second control chamber 173 through the second pneumatic control port 123, again pushing the slide valve 127 to the off position. At this point, the input chamber 171 is again in communication with the second output chamber 175 via the internal chamber 126, and the first output chamber 174 is closed by the slide valve 127. The output of the first output 124 is cut off and the control terminal of the air operated diaphragm pump 13 and the input IN of the air operated timer 14 no longer receive the air input and the air operated diaphragm pump 13 stops.

Fig. 5 shows a schematic diagram of the automatic timer stop state of the air operated diaphragm pump. In order to prevent the pneumatic diaphragm pump from not closing due to misoperation or other reasons and working for a long time, the control device of the pneumatic diaphragm pump is also provided with a function of automatically stopping the timing. When the first output 124 outputs an airflow, the input IN of the pneumatic controlled timer 14 has an input airflow. At this time, the pneumatic timer 14 starts the operation timing, which may be set to 300 seconds. The work timing is performed by a spring timing mechanism. When the work timing is over, the pneumatic control timer 14 is conducted, the input terminal IN and the output terminal OUT are conducted, and the air flow can flow from the input terminal IN to the output terminal OUT. The output OUT of the pneumatic timer 14 outputs an air flow to the second control terminal 123, which enters the second control chamber 173, pushing the slide valve 127 to the stop position. Causing the first output 124 to stop outputting airflow. When the first output 124 stops outputting airflow, the input IN of the pneumatic controlled timer 14 no longer has input airflow. The pneumatic control timer 14 starts the reset timing after the stop of the input air flow, and the reset timing is 200 msec. When the reset timing is over, the pneumatic control timer 14 is turned off, and the input terminal IN and the output terminal OUT are not conducted.

The control device of the pneumatic diaphragm pump is simple in structure, low in cost and reliable in operation, and can effectively reduce labor intensity and improve working efficiency.