A pneumatic diaphragm pump system and a blowback method

Abstract

The application relates to the technical field of air-driven diaphragm pumps, and discloses an air-driven diaphragm pump system and a back blowing method. The compressed air pipeline is branched, a first branch is connected to a gas inlet end of the air-driven diaphragm pump, a second branch is connected to a fluid inlet pipeline, compressed air cut-off valves are arranged on the first branch and the second branch, the directions of compressed air entering the air-driven diaphragm pump or the fluid inlet pipeline are effectively controlled, a flow meter is arranged on a fluid outlet pipeline, the liquid outlet flow can be effectively measured by the flow meter, whether the air-driven diaphragm pump is blocked is determined according to the measured value, the fluid inlet pipeline is back blown by controlling the compressed air cut-off valve, the blocking of the air-driven diaphragm pump is effectively solved, and the service life of the air-driven diaphragm pump system is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pneumatic diaphragm pump, in particular to a pneumatic diaphragm pump system and a back flushing method. BACKGROUND

[0002] With the development of China's economic construction, the use of pumps is increasing. Pneumatic diaphragm pump is a new type of conveying machinery, which uses external medium to provide power source and is suitable for liquid conveying in various complex environments. It is different from traditional pumps, does not need power supply and is widely used in electronic industry, chemical industry, petrochemical industry, food industry and other industries. However, the existing pneumatic diaphragm pump product technology is not mature, and the blockage problem cannot be solved in time, which leads to equipment idling, diaphragm damage and affects the fatigue life of pneumatic diaphragm pump. In order to solve the technical defects, a new type of pneumatic diaphragm pump is designed, and the automatic cleaning method is innovatively improved, which improves the service life of the pump and has application significance in actual industrial production.

[0003] When the product is in the temperate continental monsoon climate, the sand and dust are rampant in spring and autumn, and the garbage, sand and weeds are accumulated in the low-lying (material return groove) place, so that the pneumatic diaphragm pump will be affected during use. Secondly, in this project, the pneumatic diaphragm pump is arranged in the underground groove, which belongs to a limited space, and the maintenance operation is more dangerous.

[0004] The pneumatic diaphragm pump is a new type of machinery that uses compressed gas as a power source to achieve the purpose of conveying medium. However, due to the immature product technology of pneumatic diaphragm pump and the influence of environmental protection problems, the liquid suction port of the pneumatic diaphragm pump will be blocked, which affects its fatigue life. SUMMARY

[0005] In order to overcome the defects of the above-mentioned prior art, the purpose of the present application is to provide a pneumatic diaphragm pump system and a back flushing method to solve the technical problem of blockage of the liquid suction port and affect the fatigue life in the prior art.

[0006] The present application is realized by the following technical solutions:

[0007] A kind of pneumatic diaphragm pump system, including pneumatic diaphragm pump, compressed air pipeline, fluid inlet pipeline, fluid outlet pipeline, first compressed air cut-off valve, second compressed air cut-off valve, flowmeter and control system;The output end of the fluid inlet pipeline is connected to the liquid inlet end of pneumatic diaphragm pump;The output end of the compressed air pipeline is branched, wherein the first branch is connected to the gas inlet end of pneumatic diaphragm pump, and the second branch is connected to the fluid inlet pipeline close to the side of pneumatic diaphragm pump;The liquid outlet end of pneumatic diaphragm pump is connected to the fluid outlet pipeline, the first compressed air cut-off valve is installed on the first branch;The second compressed air cut-off valve is installed on the second branch;The flowmeter is installed on the fluid outlet pipeline, and the control end of the control system is connected to the first compressed air cut-off valve, the second compressed air cut-off valve and the flowmeter respectively.

[0008] Preferably, a controller is provided in the control system, the input end of the controller is connected to the data acquisition module, the output end of the controller is connected to the data comparison module and the drive module, the output end of the data acquisition module is connected to the flowmeter;The output end of the drive module is connected to the first compressed air cut-off valve and the second compressed air cut-off valve.

[0009] Preferably, a compressed air total valve is installed on the compressed air pipeline, and the compressed air total valve is installed close to the inlet of the compressed air pipeline.

[0010] Preferably, a filter pressure regulating valve integrated component is further provided on the compressed air pipeline.

[0011] Preferably, a fluid outlet valve is provided on the fluid outlet pipeline.

[0012] Preferably, a silencer is provided on the pneumatic diaphragm pump.

[0013] Preferably, the pneumatic diaphragm pump is placed on a base.

[0014] A back flushing method of a pneumatic diaphragm pump system, based on the above-mentioned pneumatic diaphragm pump system, comprising the following processes:

[0015] A set liquid outlet flow rate set value is set on the control system;When the liquid outlet flow rate detected by the flowmeter is lower than the set liquid outlet flow rate set value, the control system controls the first compressed air cut-off valve to execute valve closing action, the pneumatic diaphragm pump stops working, the control system controls the second compressed air cut-off valve to execute valve opening action, compressed air enters the fluid inlet pipeline through the second branch of the compressed air pipeline, back flushing work is performed, dirt in the fluid inlet pipeline is back flushed, after the set time of back flushing work is executed, the control system controls the second compressed air cut-off valve to execute valve closing action, the control system controls the first compressed air cut-off valve to execute valve opening action, and the pneumatic diaphragm pump starts working.

[0016] Preferably, the compressed air flows into the pneumatic diaphragm pump through the first branch, the pneumatic diaphragm pump pumps the fluid in the fluid inlet pipeline to the fluid outlet pipeline, when the first compressed air cut-off valve performs the valve closing action, the pneumatic diaphragm pump stops working, when the second compressed air cut-off valve performs the valve opening action, the compressed air enters the fluid inlet pipeline through the second branch of the compressed air pipeline, and the back flushing work is performed.

[0017] Preferably, when the fluid inlet pipeline is blocked, the liquid outflow through the pneumatic diaphragm pump to the fluid outlet pipeline is reduced.

[0018] Compared with the prior art, the pneumatic diaphragm pump system has the following beneficial technical effects:

[0019] The pneumatic diaphragm pump system is provided, the compressed air pipeline is branched, the first branch is connected to the gas inlet end of the pneumatic diaphragm pump, the second branch is connected to the fluid inlet pipeline, the compressed air cut-off valves are arranged on the first branch and the second branch respectively, the direction of the compressed air entering the pneumatic diaphragm pump or the fluid inlet pipeline is effectively controlled, the flow meter is arranged on the fluid outlet pipeline, the liquid outflow can be effectively measured by the flow meter, whether the pneumatic diaphragm pump is blocked is determined by the measured value, and the blocking of the pneumatic diaphragm pump is effectively solved by back flushing the fluid inlet pipeline by controlling the compressed air cut-off valve, so that the service life of the pneumatic diaphragm pump system is ensured.

[0020] Further, the liquid outflow is effectively collected by the flow meter through the control system, and the blocking of the pneumatic diaphragm pump is effectively solved by back flushing the fluid inlet pipeline by controlling the first compressed air cut-off valve and the second compressed air cut-off valve.

[0021] Further, the compressed air total valve is arranged on the compressed air pipeline, and the compressed air pipeline is effectively controlled.

[0022] Further, the filter pressure regulating valve integrated piece is further arranged on the compressed air pipeline, the cleanliness of the compressed air is ensured, the air supply pressure is ensured, and the stability of the liquid outflow is ensured.

[0023] A back flushing method of the pneumatic diaphragm pump system, the control system collects the liquid outflow by the flow meter, and the blocking of the pneumatic diaphragm pump is effectively solved by back flushing the fluid inlet pipeline by controlling the first compressed air cut-off valve and the second compressed air cut-off valve, so that the continuous and stable operation of the pneumatic diaphragm pump is ensured, and the fatigue life of the pneumatic diaphragm pump is improved. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 The figure is a structural schematic diagram of the pneumatic diaphragm pump system in the application;

[0025] Figure 2 The control system schematic diagram in the application.

[0026] In the figure: 1-pneumatic diaphragm pump; 2-compressed air pipeline; 3-compressed air total valve; 4-filter pressure regulating valve integrated component; 5-first compressed air cut-off valve; 6-second compressed air cut-off valve; 7-fluid inlet pipeline; 8-flow meter; 9-fluid outlet valve; 10-fluid outlet pipeline; 11-silencer; 12-control system; 13-base. DETAILED DESCRIPTION

[0027] In order to make the personnel in the art better understand the application scheme, the technical scheme in the embodiments of the application will be described clearly and completely in combination with the accompanying drawings in the embodiments of the application. Obviously, the described embodiments are only a part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the application.

[0028] It should be noted that the terms "first", "second" and the like in the specification and claims of the application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0029] The application will be described in further detail below in combination with the accompanying drawings:

[0030] In order to overcome the defects of the prior art, the purpose of the application is to provide a pneumatic diaphragm pump system and a back flushing method, so as to solve the technical problem of liquid suction port blockage and influence on fatigue life in the prior art.

[0031] Specifically, according to Figure 1As shown, the pneumatic diaphragm pump system comprises a pneumatic diaphragm pump 1, a compressed air pipeline 2, a fluid inlet pipeline 7, a fluid outlet pipeline 10, a first compressed air cut-off valve 5, a second compressed air cut-off valve 6, a flow meter 8 and a control system 12; the output end of the fluid inlet pipeline 7 is connected to the liquid inlet end of the pneumatic diaphragm pump 1; the output end of the compressed air pipeline 2 is branched, wherein the first branch is connected to the gas inlet end of the pneumatic diaphragm pump 1, and the second branch is connected to the fluid inlet pipeline 7 close to the side of the pneumatic diaphragm pump 1; the liquid outlet end of the pneumatic diaphragm pump 1 is connected to the fluid outlet pipeline 10, the first compressed air cut-off valve 5 is arranged on the first branch, and the second compressed air cut-off valve 6 is arranged on the second branch;

[0032] The flow meter 8 is arranged on the fluid outlet pipeline 10, and the control ends of the control system 12 are connected to the first compressed air cut-off valve 5, the second compressed air cut-off valve 6 and the flow meter 8 respectively.

[0033] Specifically, according to the pneumatic diaphragm pump system, Figure 2 As shown, the control system 12 is provided with a controller, the input end of the controller is connected to a data acquisition module, the output end of the controller is connected to a data comparison module and a driving module, the output end of the data acquisition module is connected to the flow meter 8, and the output end of the driving module is connected to the first compressed air cut-off valve 5 and the second compressed air cut-off valve 6; through the control system, the liquid flow is effectively collected through the flow meter, and the back blowing of the fluid inlet pipeline is effectively solved through the control of the first compressed air cut-off valve and the second compressed air cut-off valve.

[0034] Specifically, a compressed air total valve 3 is arranged on the compressed air pipeline 2, the compressed air total valve 3 is arranged close to the inlet of the compressed air pipeline 2, and the compressed air pipeline is effectively controlled.

[0035] Specifically, a filter pressure regulating valve integrated piece 4 is further arranged on the compressed air pipeline 2, so as to ensure the cleanliness of compressed air and the air supply pressure, and to ensure the stability of the liquid flow.

[0036] Specifically, a fluid outlet valve 9 is arranged on the fluid outlet pipeline 10, so as to effectively control the amount of liquid flow and ensure the stability of the liquid flow.

[0037] Specifically, a silencer 11 is arranged on the pneumatic diaphragm pump 1.

[0038] Specifically, the pneumatic diaphragm pump 1 is placed on a base 13.

[0039] The application also provides a back blowing method of a pneumatic diaphragm pump system, based on the above-mentioned pneumatic diaphragm pump system, comprising the following processes:

[0040] The outflow rate set value is set on the control system 12; when the outflow rate detected by the flow meter 8 is lower than the set outflow rate set value, the control system 12 controls the first compressed air cut-off valve 5 to perform the valve closing action, the pneumatic diaphragm pump 1 stops working, the control system 12 controls the second compressed air cut-off valve 6 to perform the valve opening action, the compressed air enters the fluid inlet pipeline 7 through the second branch via the compressed air pipeline 2, the back flushing work is performed, the dirt in the fluid inlet pipeline 7 is back flushed, after the set time of the back flushing work is performed, the control system 12 controls the second compressed air cut-off valve 6 to perform the valve closing action, the control system 12 controls the first compressed air cut-off valve 5 to perform the valve opening action, and the pneumatic diaphragm pump 1 starts working.

[0041] Wherein, the compressed air flows into the pneumatic diaphragm pump 1 through the first branch, the pneumatic diaphragm pump 1 pumps the fluid in the fluid inlet pipeline 7 to the fluid outlet pipeline 10, when the first compressed air cut-off valve 5 is controlled to perform the valve closing action, the pneumatic diaphragm pump 1 stops working, and when the second compressed air cut-off valve 6 is controlled to perform the valve opening action, the compressed air enters the fluid inlet pipeline 7 through the second branch via the compressed air pipeline 2, and the back flushing work is performed.

[0042] Wherein, when the fluid inlet pipeline 7 is blocked, the outflow rate of the fluid flowing from the pneumatic diaphragm pump 1 to the fluid outlet pipeline 10 is reduced.

[0043] Embodiment

[0044] The embodiment provides a pneumatic diaphragm pump system, which controls stable compressed gas supplement through a pressure regulating valve, increases an online flow meter 8 at the outlet of a pneumatic diaphragm pump 1, monitors the outlet fluid flow, and judges whether the inlet pipeline is blocked. A cut-off valve is added to the compressed gas inlet pneumatic diaphragm pump body and the inlet pipeline, when the fluid flow is less than the set flow, the first compressed air cut-off valve 5 is automatically closed, and the second compressed air cut-off valve 6 is automatically opened, and the second compressed air cut-off valve 6 is automatically closed after 60S, so that the purpose of back flushing the inlet pipeline of the pneumatic diaphragm pump is achieved, the suction port of the pneumatic diaphragm pump is prevented from being blocked, the number of diaphragm damages in the equipment, the equipment failure rate and the difficulty of maintenance operation in the limited space are reduced.

[0045] In summary, the application provides a kind of pneumatic diaphragm pump system and blowback method, by the branch road setting of compressed air pipeline, wherein first branch is connected to the gas inlet end of pneumatic diaphragm pump, second branch is connected to fluid inlet pipeline, compressed air cut-off valve is set on first branch and second branch respectively, the direction of compressed air entering pneumatic diaphragm pump or fluid inlet pipeline is effectively controlled, flowmeter is set on fluid outlet pipeline, the flow of outflow can be effectively measured by flowmeter, whether pneumatic diaphragm pump has the phenomenon of blockage is determined by the measured value, and the phenomenon of blockage of pneumatic diaphragm pump is effectively solved by controlling compressed air cut-off valve to blow back fluid inlet pipeline, the service life of pneumatic diaphragm pump system is guaranteed.

[0046] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, but not to limit it, although the present application has been described in detail with reference to the above examples, those skilled in the art should understand that: the specific embodiments of the present application can still be modified or replaced by the equivalent, without departing from the spirit and scope of the present application, any modification or equivalent replacement, which should be covered within the protection scope of the claims of the present application.

Claims

1. A backflushing method for a pneumatic diaphragm pump system, based on a pneumatic diaphragm pump system comprising a pneumatic diaphragm pump (1), a compressed air pipeline (2), a fluid inlet pipeline (7), a fluid outlet pipeline (10), a first compressed air shut-off valve (5), a second compressed air shut-off valve (6), a flow meter (8), and a control system (12); the output end of the fluid inlet pipeline (7) is connected to the liquid inlet end of the pneumatic diaphragm pump (1); the output end of the compressed air pipeline (2) is branched, wherein the first branch is connected to the pneumatic diaphragm pump. The gas inlet end of the pump (1) is connected to the fluid inlet pipe (7) near the side of the pneumatic diaphragm pump (1); the liquid outlet end of the pneumatic diaphragm pump (1) is connected to the fluid outlet pipe (10); the first compressed air shut-off valve (5) is mounted on the first branch; the second compressed air shut-off valve (6) is mounted on the second branch; the flow meter (8) is mounted on the fluid outlet pipe (10); and the control terminal of the control system (12) is connected to the first compressed air shut-off valve (5), the second compressed air shut-off valve (6), and the flow meter (8) respectively. The control system (12) includes a controller, the input of which is connected to a data acquisition module, and the output of which is connected to a data comparison module and a drive module. The output of the data acquisition module is connected to a flow meter (8); the output of the drive module is connected to a first compressed air shut-off valve (5) and a second compressed air shut-off valve (6). The system is characterized in that... The process includes the following: Set the liquid flow rate setting value on the control system (12); when the liquid flow rate detected by the flow meter (8) is lower than the set liquid flow rate setting value, the control system (12) controls the first compressed air shut-off valve (5) to perform the valve closing action, the pneumatic diaphragm pump (1) stops working, the control system (12) controls the second compressed air shut-off valve (6) to perform the valve opening action, the compressed air enters the fluid inlet pipe (7) through the second branch via the compressed air pipe (2), and performs backflushing to backflush the dirt in the fluid inlet pipe (7). After the backflushing operation has been performed for the set time, the control system (12) controls the second compressed air shut-off valve (6) to perform the valve closing action, the control system (12) controls the first compressed air shut-off valve (5) to perform the valve opening action, and the pneumatic diaphragm pump (1) starts working. After the compressed air flows into the pneumatic diaphragm pump (1) through the first branch, the pneumatic diaphragm pump (1) pumps the fluid in the fluid inlet pipe (7) to the fluid outlet pipe (10). When the first compressed air shut-off valve (5) is controlled to close, the pneumatic diaphragm pump (1) stops working. When the second compressed air shut-off valve (6) is controlled to open, the compressed air enters the fluid inlet pipe (7) through the second branch via the compressed air pipe (2) to perform backflushing. When the fluid inlet pipe (7) is blocked, the flow rate of the fluid flowing through the pneumatic diaphragm pump (1) to the fluid outlet pipe (10) is reduced.

2. The backflush method for a pneumatic diaphragm pump system according to claim 1, characterized in that, The compressed air pipeline (2) is equipped with a compressed air main valve (3), which is located near the inlet of the compressed air pipeline (2).

3. The backflush method for a pneumatic diaphragm pump system according to claim 1, characterized in that, The compressed air pipeline (2) is also equipped with a filter pressure regulating valve assembly (4).

4. The backflush method for a pneumatic diaphragm pump system according to claim 1, characterized in that, A fluid outlet valve (9) is provided on the fluid outlet pipe (10).

5. The backflush method for a pneumatic diaphragm pump system according to claim 1, characterized in that, The pneumatic diaphragm pump (1) is equipped with a silencer (11).

6. The backflush method for a pneumatic diaphragm pump system according to claim 1, characterized in that, The pneumatic diaphragm pump (1) is placed on the base (13).

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