Pneumatic diaphragm pump

Abstract

The utility model relates to the technical field of diaphragm pumps, in particular to a pneumatic diaphragm pump which comprises a pneumatic diaphragm pump body, the liquid discharge end of the pneumatic diaphragm pump body is fixedly communicated with a liquid discharge pipe, the liquid inlet end of the pneumatic diaphragm pump body is fixedly communicated with a connecting pipe, and the surface of the connecting pipe is fixedly communicated with a liquid inlet pipe. An extending plate is fixedly assembled on the inner wall of the connecting pipe, the surface of the extending plate is fixedly communicated with a filter screen, a sliding rod penetrates through the filter screen in a sliding mode, a scraping plate is fixedly assembled at one end of the sliding rod, the scraping plate abuts against the inner wall of the filter screen, and the outer circumferential face of the sliding rod is sleeved with a spring. According to the pneumatic diaphragm pump, the filter screen is arranged, when the pneumatic diaphragm pump body is used, the filter screen can filter liquid, impurities in the liquid can be reserved on the inner wall of the filter screen, and therefore the situation that the impurities enter the pneumatic diaphragm pump body, and a diaphragm in the pneumatic diaphragm pump body is abraded is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to diaphragm pump technical field especially relates to a pneumatic diaphragm pump. BACKGROUND

[0002] Pneumatic diaphragm pump is a kind of pump using compressed air as power source, this pump has good self-priming performance, even in the case that liquid does not completely fill the pump body also can work normally, is widely used in chemical industry, pharmacy, food processing etc.

[0003] In prior art, when pneumatic diaphragm pump works, compressed air will enter the air chamber of pump, promotes diaphragm to one side movement, and the volume of diaphragm other side chamber increases and forms negative pressure, at this time suction valve opens, liquid is inhaled;When compressed air reverses, diaphragm reverses movement, and the volume of chamber decreases, and pressure rises, and discharge valve opens, and liquid is extruded from pump body, so circulation reciprocating realizes liquid delivery.

[0004] The above and prior art have the following defects: in the process of pneumatic diaphragm pump work, when liquid contains impurities, impurities are easily attached and remain in pneumatic diaphragm pump, cause diaphragm to be abraded, thereby affect diaphragm normal work, cause the working efficiency of pneumatic diaphragm pump to decline.

[0005] Therefore, a kind of pneumatic diaphragm pump is proposed. UTILITY MODEL CONTENT

[0006] The utility model aims at solving when liquid contains impurities, impurities are easily attached and remain in pneumatic diaphragm pump, cause diaphragm to be abraded, thereby affect diaphragm normal work's shortcoming, and a kind of pneumatic diaphragm pump is proposed.

[0007] To achieve the above object, the utility model adopts the following technical scheme: a kind of pneumatic diaphragm pump, including pneumatic diaphragm pump body, the liquid discharge end of the pneumatic diaphragm pump body is fixedly connected with liquid discharge pipe, the liquid inlet end of the pneumatic diaphragm pump body is fixedly connected with connecting pipe, the surface of the connecting pipe is fixedly connected with liquid inlet pipe, the inner wall of the connecting pipe is fixedly equipped with extension plate, the surface of the extension plate is fixedly connected with filter screen.

[0008] The effect reached by the above components is that: by setting filter screen, when using pneumatic diaphragm pump body, filter screen can filter liquid, and impurities in liquid can be left on the inner wall of filter screen, thereby avoiding the occurrence of the condition that impurities enter pneumatic diaphragm pump body and cause abrasion to diaphragm in pneumatic diaphragm pump body.

[0009] Preferably, the filter screen is slidably penetrated by a slide rod, one end of the slide rod is fixedly equipped with a scraper, the scraper is abutted against the inner wall of the filter screen, the outer circumferential surface of the slide rod is sleeved with a spring, and the two ends of the spring are fixedly connected with the filter screen and the slide rod respectively.

[0010] The effect achieved by the above components is as follows: when the liquid stops flowing, the spring begins to contract, and the slide bar will drive the scraper to slide along the inner wall of the filter screen with the help of the spring force. The scraper will push out the impurities attached to the inner wall of the filter screen.

[0011] Preferably, a baffle is fixedly mounted on the inner wall of the filter screen, and the scraper abuts against the surface of the baffle.

[0012] The effect achieved by the above components is that when the scraper contacts the stop block, the stop block limits the movement range of the scraper, preventing the scraper from sliding out of the filter screen due to the spring force.

[0013] Preferably, the lower surface of the connecting tube is fixedly connected to a connecting pipe, and the lower end of the connecting pipe is slidably fitted with a storage bottle.

[0014] The effect achieved by the above components is that impurities will settle along the surface of the extension plate into the connecting tube, and then settle into the collection bottle, which will collect the impurities.

[0015] Preferably, a rectangular plate is fixedly mounted on the lower surface of the connecting tube, a connecting rod slides through the rectangular plate, a limiting plate is fixedly mounted on one end of the connecting rod, the limiting plate is slidably connected to the storage bottle, and both the limiting plate and the storage bottle have inclined surfaces.

[0016] The effect achieved by the above components is that when the limiting plate abuts against the surface of the storage bottle, it restricts the position of the storage bottle.

[0017] Preferably, the connecting rod has a regular hexagonal prism structure.

[0018] The effect achieved by the above components is that the connecting rod, which has a regular hexagonal prism structure, can restrict the movement path of the limiting plate, so that the limiting plate is aligned with the storage bottle.

[0019] Preferably, a leaf spring is fixedly mounted on the surface of the connecting rod, and one end of the leaf spring is fixedly connected to the rectangular plate.

[0020] The effect achieved by the above components is that when the storage bottle moves a certain distance, the leaf spring retracts, and the connecting rod will use the elastic force of the leaf spring to drive the limiting plate to slide and reset.

[0021] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0022] In this invention, by setting a filter screen, when the pneumatic diaphragm pump body is used, the filter screen will filter the liquid, and the impurities in the liquid will remain on the inner wall of the filter screen, thereby preventing impurities from entering the pneumatic diaphragm pump body and causing wear to the diaphragm inside the pneumatic diaphragm pump body. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the structure of the pneumatic diaphragm pump body of this utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the connecting pipe of this utility model;

[0026] Figure 4 This is a cross-sectional structural diagram of the connecting pipe of this utility model;

[0027] Figure 5 This is a schematic diagram of the disassembled structure of the connecting pipe of this utility model.

[0028] Legend: 1. Pneumatic diaphragm pump body; 2. Drain pipe; 3. Connecting pipe; 4. Inlet pipe; 5. Extension plate; 6. Filter screen; 7. Slide rod; 8. Scraper; 9. Spring; 10. Stop block; 11. Connecting pipe; 12. Storage bottle; 13. Rectangular plate; 14. Connecting rod; 15. Limiting plate; 16. Leaf spring. Detailed Implementation

[0029] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0030] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0031] like Figures 1-5As shown, this utility model provides a pneumatic diaphragm pump, including a pneumatic diaphragm pump body 1. A discharge pipe 2 is fixedly connected to the discharge end of the pneumatic diaphragm pump body 1, and a connecting pipe 3 is fixedly connected to the inlet end of the pneumatic diaphragm pump body 1. An inlet pipe 4 is fixedly connected to the surface of the connecting pipe 3. An extension plate 5 is fixedly mounted on the inner wall of the connecting pipe 3, and a filter screen 6 is fixedly connected to the surface of the extension plate 5. A slide rod 7 slides through the filter screen 6, and a scraper 8 is fixedly mounted at one end of the slide rod 7. The scraper 8 abuts against the inner wall of the filter screen 6, and the outer circumference of the slide rod 7 is fitted with... There is a spring 9, and its two ends are fixedly connected to the filter screen 6 and the slide rod 7 respectively. When the liquid stops flowing, the spring 9 begins to contract, and the slide rod 7 will drive the scraper 8 to slide along the inner wall of the filter screen 6 with the help of the elastic force of the spring 9. The scraper 8 pushes out the impurities attached to the inner wall of the filter screen 6. A stop block 10 is fixedly installed on the inner wall of the filter screen 6. The scraper 8 abuts against the surface of the stop block 10. When the scraper 8 contacts the stop block 10, the stop block 10 reaches the limit of the movement range of the scraper 8, preventing the scraper 8 from sliding out of the filter screen 6 due to the elastic force of the spring 9.

[0032] A connecting pipe 11 is fixedly connected to the lower surface of the connecting pipe 3. A collection bottle 12 is slidably fitted onto the lower end of the connecting pipe 11. Impurities will settle along the surface of the extension plate 5 into the connecting pipe 11, and then settle into the collection bottle 12, which will collect the impurities. A rectangular plate 13 is fixedly mounted on the lower surface of the connecting pipe 3. A connecting rod 14 slides through the rectangular plate 13. A limiting plate 15 is fixedly mounted on one end of the connecting rod 14. The limiting plate 15 is slidably connected to the collection bottle 12. Both the limiting plate 15 and the collection bottle 12 have inclined surfaces. When the limiting plate 15 abuts against the surface of the storage bottle 12, it restricts the position of the storage bottle 12. The connecting rod 14 has a regular hexagonal prism structure, which can restrict the movement path of the limiting plate 15, so that the limiting plate 15 is aligned with the storage bottle 12. A leaf spring 16 is fixedly mounted on the surface of the connecting rod 14. One end of the leaf spring 16 is fixedly connected to the rectangular plate 13. When the storage bottle 12 moves a certain distance, the leaf spring 16 retracts, and the connecting rod 14 will drive the limiting plate 15 to slide and reset with the help of the elastic force of the leaf spring 16.

[0033] The overall working principle is as follows: When using the pneumatic diaphragm pump body 1, liquid is introduced into the inlet pipe 4, and then the liquid flows into the connecting pipe 3. Under the obstruction of the extension plate 5, the liquid impacts the scraper 8, which slides along the inner wall of the filter screen 6. The sliding of the scraper 8 drives the sliding rod 7 to slide, which in turn stretches the spring 9. Then the liquid flows through the filter screen 6, which filters the liquid. Impurities in the liquid are retained on the inner wall of the filter screen 6, thus preventing impurities from entering the pneumatic diaphragm pump body. Within 1, wear occurs on the diaphragm inside the pneumatic diaphragm pump body 1. When the liquid stops flowing, the spring 9 begins to contract, and the slide rod 7, with the help of the spring force of the spring 9, drives the scraper 8 to slide along the inner wall of the filter screen 6. The scraper 8 pushes out the impurities attached to the inner wall of the filter screen 6. When the scraper 8 contacts the stop block 10, the stop block 10 reaches the limit of the movement range of the scraper 8, preventing the scraper 8 from sliding out of the filter screen 6 due to the spring force of the spring 9. The impurities will settle along the surface of the extension plate 5 to the connecting plate. The impurities are collected in tube 11 and then settle in storage bottle 12. When it's time to empty the impurities from storage bottle 12, pull connecting rod 14. Connecting rod 14 will move limiting plate 15, causing it to disengage from storage bottle 12. Then, storage bottle 12 can be removed downwards. After emptying the impurities, storage bottle 12 is reattached to the lower end of connecting tube 11. During this process, the inclined surface of storage bottle 12 will press against the inclined surface of limiting plate 15. The limiting plate 15 will move towards the rectangular plate 13. At this time, the leaf spring 16 will be stretched by the connecting rod 14. After the storage bottle 12 moves a certain distance, the leaf spring 16 will retract, and the connecting rod 14 will drive the limiting plate 15 to slide in the opposite direction with the help of the elastic force of the leaf spring 16. When the limiting plate 15 abuts against the surface of the storage bottle 12, it will restrict the position of the storage bottle 12. At the same time, the connecting rod 14, which has a regular hexagonal prism structure, can restrict the movement path of the limiting plate 15, so that the limiting plate 15 is aligned with the storage bottle 12.

[0034] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A pneumatic diaphragm pump comprising a pneumatic diaphragm pump body (1), characterized in that: The liquid outlet end of the air-driven diaphragm pump body (1) is fixedly communicated with a liquid outlet pipe (2), the liquid inlet end of the air-driven diaphragm pump body (1) is fixedly communicated with a connecting pipe (3), the surface of the connecting pipe (3) is fixedly communicated with a liquid inlet pipe (4), the inner wall of the connecting pipe (3) is fixedly assembled with an extension plate (5), and the surface of the extension plate (5) is fixedly communicated with a filter screen (6).

2. A gas driven diaphragm pump according to claim 1, characterized in that: The filter screen (6) is slidably penetrated by a sliding rod (7), one end of the sliding rod (7) is fixedly assembled with a scraper (8), the scraper (8) abuts against the inner wall of the filter screen (6), the outer circumferential surface of the sliding rod (7) is sleeved with a spring (9), and the two ends of the spring (9) are fixedly connected with the filter screen (6) and the sliding rod (7) respectively.

3. A gas driven diaphragm pump according to claim 2, characterized in that: The inner wall of the filter screen (6) is fixedly assembled with a stop block (10), and the scraper (8) abuts against the surface of the stop block (10).

4. A gas driven diaphragm pump according to claim 1, characterized in that: The lower surface of the connecting pipe (3) is fixedly communicated with a connecting pipe (11), and the lower end of the connecting pipe (11) is slidably sleeved with a storage bottle (12).

5. A gas driven diaphragm pump according to claim 1, characterized in that: The lower surface of the connecting pipe (3) is fixedly assembled with a rectangular plate (13), the rectangular plate (13) is slidably penetrated by a connecting rod (14), one end of the connecting rod (14) is fixedly assembled with a limiting plate (15), the limiting plate (15) is slidably connected with the storage bottle (12), and the surfaces of the limiting plate (15) and the storage bottle (12) are both provided with inclined surfaces.

6. A gas driven diaphragm pump according to claim 5, characterized in that: The connecting rod (14) is in a regular hexagonal prism structure.

7. A gas driven diaphragm pump according to claim 5, characterized in that: The surface of the connecting rod (14) is fixedly assembled with a plate spring (16), and one end of the plate spring (16) is fixedly connected with the rectangular plate (13).

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