Equipment for pumping corrosive liquid and control method thereof

Abstract

The invention discloses equipment for pumping corrosive liquid and a control method of the equipment. The equipment comprises a cylinder body, air bag pumping assemblies are arranged on the two sides of the cylinder body correspondingly, and an alternate control assembly used for controlling the two air bag pumping assemblies to be compressed and stretched in turn is arranged in the cylinder body; a fluid inlet pipeline and a fluid outlet pipeline are arranged on the cylinder body, and two reverse control valves and two forward control valves are arranged in the middle of the cylinder body in a bilateral symmetry mode. The air bag pumping assembly is made of an anti-corrosion material; one end of the reverse control valve is connected to the air bag pumping assembly on the corresponding side, and the other end of the reverse control valve is connected to the fluid discharge pipeline; one end of the forward control valve is connected to the air bag pumping assembly on the corresponding side, the other end of the forward control valve is connected to the fluid inlet pipeline, and stable and safe conveying of highly corrosive liquid is achieved by optimizing the structural design and selecting corrosion-resistant materials.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fluid conveying equipment, in particular to a device for pumping corrosive liquid and a control method thereof. BACKGROUND

[0002] In the production process of chips, panels and the like, strong corrosive acids, alkalis and other chemical reagents need to be frequently used. The core structure of the traditional conveying equipment is designed by using a single pump body in combination with a pipeline and a valve. The traditional single pump body structure has a gap between suction and discharge due to the reciprocating movement of the pump body during the conveying process, which easily leads to flow fluctuation or interruption. These chemical reagents are conveyed to the use station through the pump, pipeline, valve, sealing element and other equipment. Due to their strong corrosiveness, the parts in direct contact with the fluid are quickly corroded, which leads to equipment leakage, affects the continuity of production, and has great safety hazards.

[0003] At present, most of the fluid conveying pumps on the domestic market are designed for water or weakly corrosive fluids, and are difficult to adapt to strong corrosive environments. Even if a few devices are used in strong corrosive environments, they generally have short service life and are prone to leakage, which cannot meet the requirements of industrial production for equipment stability and safety.

[0004] Therefore, the existing fluid conveying equipment technology needs to be further improved. SUMMARY

[0005] The purpose of the present application is to provide a device for pumping corrosive liquid and a control method thereof, which realizes stable and safe conveying of strong corrosive liquid by optimizing the structure design and selecting corrosion-resistant materials.

[0006] In order to achieve the above purpose, the present application adopts the following scheme:

[0007] A device for pumping corrosive liquid, comprising a cylinder, wherein two windbag pumping assemblies are arranged on both sides of the cylinder, a turn-by-turn control assembly for controlling the turn-by-turn compression and stretching of the two windbag pumping assemblies is arranged in the cylinder, a fluid inlet pipeline and a fluid outlet pipeline are arranged on the cylinder, and two reverse control valves and two forward control valves are symmetrically arranged on the left and right of the middle part of the cylinder.

[0008] The windbag pumping assembly is made of a corrosion-resistant material;

[0009] One end of the reverse control valve is connected to the corresponding windbag pumping assembly on one side, and the other end is connected to the fluid outlet pipeline;

[0010] One end of the forward control valve is connected to the corresponding windbag pumping assembly on one side, and the other end is connected to the fluid inlet pipeline.

[0011] Further, the air bag pumping assembly comprises a cavity provided in the cylinder, an intermediate partition assembly provided in the middle of the cavity, a compressed air bag provided on one side of the intermediate partition assembly, and a control assembly provided on one side of the cavity for controlling the left and right movement of the compressed air bag.

[0012] Further, the compressed air bag is made of PTFE material.

[0013] Further, the control assembly comprises a guide hole provided on one side of the cavity, a movable guide rod movably provided in the guide hole, an air bag connecting frame provided at the inner end of the movable guide rod, and the compressed air bag movably connected to one end of the air bag connecting frame and fixedly provided on the side wall of the intermediate partition assembly.

[0014] Further, the turn-by-turn control assembly comprises a connecting rod provided at the outer end of the movable guide rod, one or more than one synchronous guide hole provided on the cylinder, a synchronous guide rod movably provided in the synchronous guide hole, and the synchronous guide rod connected to the connecting rods on both sides, and a driving assembly connected to the synchronous guide rod for driving the synchronous guide rod to reciprocate.

[0015] Further, the fluid inlet pipe and the fluid outlet pipe are provided on the intermediate partition assembly.

[0016] Further, the forward control valve and the reverse control valve are solenoid valve structures.

[0017] Further, the reverse control valve comprises a first conveying pipe provided in the compressed air bag and fixedly connected to the intermediate partition assembly, one end of the first conveying pipe communicated with the inside of the corresponding side of the compressed air bag, the other end of the first conveying pipe communicated with the fluid outlet pipe, a feeding through hole provided at the end of the first conveying pipe close to the inside of the compressed air bag, a stretchable sealing terminal provided in the first conveying pipe for sealing the feeding through hole, and a first spring assembly provided in the first conveying pipe for pressing the stretchable sealing terminal to keep the feeding through hole sealed.

[0018] Further, the forward control valve comprises a second conveying pipe provided in the compressed air bag and fixedly connected to the intermediate partition assembly, one end of the second conveying pipe communicated with the inside of the corresponding side of the compressed air bag, the other end of the second conveying pipe communicated with the fluid inlet pipe, a discharging through hole provided at the end of the second conveying pipe close to the fluid outlet pipe, a compressible sealing terminal provided in the second conveying pipe for sealing the discharging through hole, and a second spring assembly provided in the second conveying pipe for pressing the compressible sealing terminal to keep the discharging through hole sealed.

[0019] A control method, drive assembly: for driving two sides of the air bag pumping assembly to compression and stretching action, two actions are alternately performed;

[0020] When one side of the air bag pumping assembly is stretched, the corresponding reverse control valve and forward control valve are as follows: the reverse control valve remains closed, and the fluid cannot flow from the reverse control valve to the fluid discharge pipe; the forward control valve is opened due to the stretching force of the air bag pumping assembly, and the fluid in the fluid inlet pipe flows to the inside of the corresponding air bag pumping assembly;

[0021] And the other side of the air bag pumping assembly is compressed synchronously, and the corresponding reverse control valve and forward control valve are as follows: the forward control valve remains closed, and the fluid in the fluid inlet pipe cannot enter the other side of the air bag pumping assembly, and the reverse control valve is opened due to the compression force, and the fluid flows from the reverse control valve to the fluid discharge pipe.

[0022] In summary, the present application has the following advantages over the prior art:

[0023] The present application solves the problems existing in the prior art fluid conveying equipment technology. Through the structure of the present application, the following advantages are achieved. In the present application, two air bags work alternately, reducing the continuous contact time of each air bag with strong corrosive fluid. In combination with the corrosion resistance of PTFE material, the corrosion accumulation effect of a single air bag can be reduced, the average trouble-free operation time of the equipment can be significantly prolonged, and the occurrence of single pump body fluid flow interruption can be solved. The air bag pumping assembly is made of corrosion-resistant material and can withstand long-term corrosion of strong acid and alkali chemicals, solving the problem of short service life of traditional equipment due to corrosion, prolonging the service life of the equipment, and realizing the directional and continuous conveying of fluid by using two air bags alternately compressed and stretched and precise control of the forward control valve and the reverse control valve. The risk of leakage is greatly reduced, and it is especially suitable for chip and panel industries with high requirements for corrosion resistance of conveying equipment, providing a reliable solution for safe and stable conveying of strong corrosive liquid. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a front view of the present application;

[0025] Figure 2 is a front view of the present application Figure 1 is a sectional view along line A-A;

[0026] Figure 3 is a left view of the present application;

[0027] Figure 4 is a front view of the present application Figure 3 is a sectional view along line B-B;

[0028] Figure 5 For the invention Figure 3 Sectional view along line C-C;

[0029] Figure 6 For the invention Figure 3 Sectional view along line D-D;

[0030] Figure 7 For the invention Figure 3 Sectional view along line E-E. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be apparently and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0032] Please refer to Figures 1-7 The present application provides a device for pumping corrosive liquid, comprising a cylinder 1, a windbag pumping assembly 2 arranged on each side of the cylinder 1, a turn-by-turn control assembly 3 arranged in the cylinder 1 for controlling the windbag pumping assembly 2 on each side to be compressed and stretched alternately, a fluid inlet pipe 4 and a fluid outlet pipe 5 arranged on the cylinder 1, and two reverse control valves 6 and two forward control valves 7 arranged symmetrically on the left and right of the middle of the cylinder 1.

[0033] The windbag pumping assembly 2 is made of anticorrosive material.

[0034] One end of the reverse control valve 6 is connected to the windbag pumping assembly 2 on the corresponding side, and the other end is connected to the fluid outlet pipe 5.

[0035] One end of the forward control valve 7 is connected to the windbag pumping assembly 2 on the corresponding side, and the other end is connected to the fluid inlet pipe 4.

[0036] The windbag pumping assembly 2 on each side of the cylinder 1 is alternately compressed and stretched under the action of the turn-by-turn control assembly 3; the windbag pumping assembly 2 is made of anticorrosive material and can contact corrosive liquid; the forward control valve 7 is used for guiding the fluid in the fluid inlet pipe 4 into the corresponding windbag pumping assembly 2, and the reverse control valve 6 is used for guiding the fluid in the windbag pumping assembly 2 out to the fluid outlet pipe 5, so that the fluid is inhaled and discharged through the cooperation of the two.

[0037] The wind bag pumping assembly 2 comprises a cavity 201 arranged in the cylinder 1, an intermediate separation assembly 206 arranged in the middle of the cavity 201, a compressed wind bag 207 arranged on one side of the intermediate separation assembly 206, and a control assembly 208 arranged on one side of the cavity 201 and used for controlling the left-right movement of the compressed wind bag 207; the cavity 201 of the wind bag pumping assembly 2 is separated by the intermediate separation assembly 206, and the compressed wind bag 207 is located on one side of the intermediate separation assembly 206; the control assembly 208 can control the left-right movement of the compressed wind bag 207, so that the compressed wind bag 207 generates compression or stretching deformation, thereby realizing the suction or discharge operation of the fluid.

[0038] The compressed wind bag 207 is made of PTFE material; the compressed wind bag 207 is made of PTFE material, and the corrosion resistance of PTFE to strong acid and alkali and other chemical reagents is used to ensure that the compressed wind bag 207 is not corroded when being in contact with corrosive liquid, thereby guaranteeing the normal fluid suction and discharge function of the compressed wind bag 207.

[0039] The control assembly 208 comprises a guide hole 202 arranged on one side of the cavity 201, a movable guide rod 203 movably arranged in the guide hole 202, a wind bag connecting frame 204 arranged at the inner end of the movable guide rod 203, and one end of the compressed wind bag 207 movably connected with the wind bag connecting frame 204 and the other end fixedly arranged on the side wall of the intermediate separation assembly 206; in the control assembly 208, the movable guide rod 203 can move in the guide hole 202, the wind bag connecting frame 204 at the inner end of the movable guide rod 203 is connected with one end of the compressed wind bag 207, and the other end of the compressed wind bag 207 is fixed on the side wall of the intermediate separation assembly 206; the movement of the movable guide rod 203 drives the compressed wind bag 207 to realize compression or stretching.

[0040] The turn-by-turn control assembly 3 comprises a connecting rod 301 arranged at the outer end of the movable guide rod 203, one or more than one synchronous guide hole 302 arranged on the cylinder 1, a synchronous guide rod 303 movably arranged in the synchronous guide hole 302, and the synchronous guide rod 303 connected with the connecting rods 301 on both sides and connected with a driving assembly used for driving the synchronous guide rod 303 to reciprocate; the synchronous guide rod 303 of the turn-by-turn control assembly 3 reciprocates in the synchronous guide hole 302, drives the movable guide rods 203 on both sides to move reversely through the connecting rods 301, and then makes the compressed wind bags 207 on both sides alternately compress and stretch, thereby realizing the turn-by-turn fluid suction and discharge action.

[0041] The fluid inlet pipe 4 and the fluid discharge pipe 5 are arranged on the intermediate separation assembly 206; the fluid inlet pipe 4 and the fluid discharge pipe 5 are arranged on the intermediate separation assembly 206, which is convenient for being connected with the forward control valve 7 and the reverse control valve 6 on both sides, centrally plans the fluid inlet and outlet path, and makes the structure more compact.

[0042] The first embodiment: the forward control valve 7 and the reverse control valve 6 are electromagnetic valve structures, the forward control valve 7 and the reverse control valve 6 are electromagnetic valve structures, and the opening and closing state thereof can be controlled through an electric signal, so that the compression and stretching actions of the compression air bag 207 are accurately matched, and the fluid is ensured to flow in the set direction.

[0043] The second embodiment: the reverse control valve 6 comprises a first conveying pipeline 601 arranged in the compression air bag 207 and fixedly connected with the intermediate separation assembly 206, one end of the first conveying pipeline 601 is communicated with the inside of the compression air bag 207 on the corresponding side, the other end is communicated with the fluid discharge pipeline 5, the end of the first conveying pipeline 601 close to the inside of the compression air bag 207 is provided with a feeding through hole 602, the first conveying pipeline 601 is provided with a stretching closing terminal 603 for closing the feeding through hole 602, and the first conveying pipeline 601 is provided with a first spring assembly 604 for pressing the stretching closing terminal 603 to keep closing the feeding through hole 602; the first conveying pipeline 601 of the reverse control valve 6 is communicated with the compression air bag 207 and the fluid discharge pipeline 5; in the normal state, the first spring assembly 604 presses the stretching closing terminal 603 to close the feeding through hole 602; when the compression air bag 207 is compressed, the internal pressure increases, the stretching closing terminal 603 is opened, and the fluid enters the fluid discharge pipeline 5 through the feeding through hole 602 and the first conveying pipeline 601.

[0044] The forward control valve 7 comprises a second conveying pipeline 701 arranged in the compression air bag 207 and fixedly connected with the intermediate separation assembly 206, one end of the second conveying pipeline 701 is communicated with the inside of the compression air bag 207 on the corresponding side, the other end is communicated with the fluid inlet pipeline 4, the end of the second conveying pipeline 701 close to the fluid discharge pipeline 5 is provided with a discharge through hole 702, the second conveying pipeline 701 is provided with a compression closing terminal 703 for closing the discharge through hole 702, and the second conveying pipeline 701 is provided with a second spring assembly 704 for pressing the compression closing terminal 703 to keep closing the discharge through hole 702; the first conveying pipeline 601 of the reverse control valve 6 is communicated with the compression air bag 207 and the fluid discharge pipeline 5; in the normal state, the first spring assembly 604 presses the stretching closing terminal 603 to close the feeding through hole 602; when the compression air bag 207 is compressed, the internal pressure increases, the stretching closing terminal 603 is opened, and the fluid enters the fluid discharge pipeline 5 through the feeding through hole 602 and the first conveying pipeline 601.

[0045] A control method, a driving assembly: used for driving the air bag pumping assemblies 2 on both sides to perform compression and stretching actions, and the two actions are alternately performed;

[0046] When one side of the air bag pumping assembly 2 is stretched, the corresponding reverse control valve 6 and forward control valve 7 are as follows: the reverse control valve 6 remains closed, and fluid cannot flow from the reverse control valve 6 to the fluid discharge pipe 5; the forward control valve 7 is opened due to the stretching force of the air bag pumping assembly 2, and fluid in the fluid inlet pipe 4 flows to the inside of the corresponding air bag pumping assembly 2.

[0047] At the same time, the air bag pumping assembly 2 on the other side is compressed, and the corresponding reverse control valve 6 and forward control valve 7 are as follows: the forward control valve 7 remains closed, and fluid in the fluid inlet pipe 4 cannot enter the air bag pumping assembly 2 on the other side; the reverse control valve 6 is opened due to the compression force, and fluid flows from the reverse control valve 6 to the fluid discharge pipe 5.

[0048] The driving assembly drives the two air bag pumping assemblies 2 to alternately compress and stretch; when one side of the air bag pumping assembly 2 is stretched, the corresponding forward control valve 7 is opened to suck in fluid, and the reverse control valve 6 is closed; when the air bag pumping assembly 2 on the other side is compressed, the corresponding reverse control valve 6 is opened to discharge fluid, and the forward control valve 7 is closed, so that continuous fluid delivery is achieved through the alternating action.

[0049] The above shows and describes the basic principles and main features of the present application and the advantages of the present application. It should be understood by those skilled in the art that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. An apparatus for pumping a corrosive liquid comprising a cylinder (1), characterised in that: The cylinder (1) is provided with a wind bag pumping assembly (2) on each side, the cylinder (1) is provided with a turn control assembly (3) for controlling the turn compression and stretching of the two wind bag pumping assemblies (2), the cylinder (1) is provided with a fluid inlet pipeline (4) and a fluid outlet pipeline (5), and the cylinder (1) is symmetrically provided with two reverse control valves (6) and two positive control valves (7) on the left and right middle parts; The wind bag pumping assembly (2) is made of anticorrosive material; One end of the reverse control valve (6) is connected to the corresponding wind bag pumping assembly (2) on one side, and the other end is connected to the fluid outlet pipeline (5); One end of the positive control valve (7) is connected to the corresponding wind bag pumping assembly (2) on one side, and the other end is connected to the fluid inlet pipeline (4).

2. An apparatus for pumping a corrosive liquid as defined in claim 1, wherein: The wind bag pumping assembly (2) comprises a cavity (201) provided in the cylinder (1), an intermediate separation assembly (206) provided in the middle of the cavity (201), a compression wind bag (207) provided on one side of the intermediate separation assembly (206), and a control assembly (208) provided on one side of the cavity (201) for controlling the left and right movement of the compression wind bag (207).

3. An apparatus for pumping a corrosive liquid as defined in claim 2, wherein: The compression wind bag (207) is made of PTFE material.

4. An apparatus for pumping a corrosive liquid as defined in claim 3, wherein: The control assembly (208) comprises a guide hole (202) provided on one side of the cavity (201), a movable guide rod (203) movably provided in the guide hole (202), a wind bag connecting frame (204) provided at the inner end of the movable guide rod (203), and the compression wind bag (207) movably connected to one end of the wind bag connecting frame (204) and fixedly provided on the side wall of the intermediate separation assembly (206).

5. An apparatus for pumping a corrosive liquid as defined in claim 4, wherein: The turn control assembly (3) comprises a connecting rod (301) provided at the outer end of the movable guide rod (203), more than one synchronous guide hole (302) provided on the cylinder (1), a synchronous guide rod (303) movably provided in the synchronous guide hole (302), and the synchronous guide rod (303) connected to the connecting rods (301) on both sides at both ends, and the synchronous guide rod (303) is connected with a driving assembly for driving the synchronous guide rod (303) to reciprocate.

6. An apparatus for pumping a corrosive liquid as defined in claim 5, wherein: The fluid inlet pipeline (4) and the fluid outlet pipeline (5) are provided on the intermediate separation assembly (206).

7. An apparatus for pumping a corrosive liquid as defined in claim 6, wherein: The positive control valve (7) and the reverse control valve (6) are electromagnetic valve structures.

8. An apparatus for pumping a corrosive liquid as defined in claim 6, wherein: The reverse control valve (6) comprises a first conveying pipe (601) arranged in the compressed air bag (207) and fixedly connected with the intermediate partition assembly (206), one end of the first conveying pipe (601) is communicated with the inside of the corresponding side compressed air bag (207), the other end is communicated with the fluid discharge pipe (5), the first conveying pipe (601) is provided with a feeding through hole (602) near the one end of the inside of the compressed air bag (207), the first conveying pipe (601) is provided with a stretchable sealing terminal (603) for closing the feeding through hole (602), and the first conveying pipe (601) is provided with a first spring assembly (604) for pressing the stretchable sealing terminal (603) to keep closing the feeding through hole (602).

9. An apparatus for pumping a corrosive liquid as defined in claim 8, wherein: The forward control valve (7) comprises a second conveying pipe (701) arranged in the compressed air bag (207) and fixedly connected with the intermediate partition assembly (206), one end of the second conveying pipe (701) is communicated with the inside of the corresponding side compressed air bag (207), the other end is communicated with the fluid inlet pipe (4), the second conveying pipe (701) is provided with a discharging through hole (702) near the one end of the fluid discharge pipe (5), the second conveying pipe (701) is provided with a compression sealing terminal (703) for closing the discharging through hole (702), and the second conveying pipe (701) is provided with a second spring assembly (704) for pressing the compression sealing terminal (703) to keep closing the discharging through hole (702).

10. A control method, comprising the device for pumping corrosive liquid according to any one of claims 1-9, characterized in that: a driving assembly is used to drive the air bag pumping assemblies (2) on both sides to perform compression and stretching actions, and the two actions are performed alternately; when the air bag pumping assembly (2) on one side is stretched, the reverse control valve (6) and the forward control valve (7) on the corresponding side perform the following actions: the reverse control valve (6) remains closed, and the fluid cannot flow from the reverse control valve (6) to the fluid discharge pipe (5); the forward control valve (7) is opened due to the stretching force of the air bag pumping assembly (2), and the fluid in the fluid inlet pipe (4) flows into the inside of the air bag pumping assembly (2) on the corresponding side; while the air bag pumping assembly (2) on the other side is compressed synchronously, the reverse control valve (6) and the forward control valve (7) on the corresponding side perform opposite actions: the forward control valve (7) remains closed, and the fluid in the fluid inlet pipe (4) cannot enter the air bag pumping assembly (2) on the other side; the reverse control valve (6) is opened due to the compression force, and the fluid flows from the reverse control valve (6) to the fluid discharge pipe (5).

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