Pneumatic double-diaphragm pump capable of conveying different liquids

Abstract

The utility model discloses a pneumatic double-diaphragm pump capable of conveying different liquids, and relates to the technical field of diaphragm pumps. Comprising a middle supporting block, outer air chambers, air valve assemblies and inner air chambers, the two ends of the middle supporting block are fixedly connected with the inner air chambers, the outer side surfaces of the inner air chambers are fixedly connected with the outer air chambers through flange plates, the side walls of the outer air chambers are connected with a main pipeline, the two ends of the main pipeline are fixedly connected with valve seats, and ball valves are arranged in the valve seats; a limiting rod is fixedly connected to the side surface of the ball valve, a first limiting mechanism is arranged on the side surface of the limiting rod, a push plate is fixedly connected to the lower end of the limiting rod, a sealing seat is fixedly connected to one end of the valve seat, a sealing point I is arranged in the sealing seat, and a second limiting mechanism is arranged in the valve seat. The problem that when the diaphragm pump works, the valve ball moves up and down in the valve seat and collides or rubs with the inner wall of the valve seat is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of diaphragm pumps, in particular to a pneumatic double-diaphragm pump capable of transporting different liquids. Background Art

[0002] The diaphragm pump is a specialized type of positive displacement pump. It relies on the reciprocating motion of a diaphragm to change the volume of its working chamber, thereby drawing in and out liquid. Its operating principle is similar to that of a plunger pump. Depending on their power source, diaphragm pumps are divided into pneumatic diaphragm pumps and electric diaphragm pumps. Pneumatic diaphragm pumps are a new type of liquid material conveying equipment. Due to their numerous advantages, such as small size, light weight, easy and flexible installation and use, simple maintenance, minimal material agitation, idling capability, no overheating, no sparking, high efficiency, and submersible operation, they are widely used in a growing number of industries, including petrochemicals, coatings, shipbuilding, water treatment, food, papermaking, and mining.

[0003] A pneumatic double-diaphragm pump that can transport different liquids is a reciprocating positive displacement pump that works alternately on the left and right sides. During the operation, the pipeline is generally closed or opened by the valve ball inside the valve seat. The valve ball of the currently existing pneumatic double-diaphragm pumps that can transport different liquids is generally movably placed in the valve seat. When subjected to different air pressures, the valve ball will move up and down in the valve seat. However, during the process of the valve ball moving up and down, it often collides or rubs with the inner wall of the valve seat. Therefore, after long-term use, the valve ball body will be damaged by impact and friction, and the service life of the valve ball will be reduced. At the same time, when the valve ball is slightly damaged, the pipeline will not be sealed tightly, and the working efficiency of the diaphragm pump will be further reduced. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the utility model provides a pneumatic double-diaphragm pump that can transport different liquids, which solves the problem that the valve ball moves up and down in the valve seat and collides or rubs against the inner wall of the valve seat when the diaphragm pump is in operation.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a pneumatic double-diaphragm pump that can transport different liquids, including an intermediate support block, an outer air chamber, an air valve assembly and an inner air chamber, both ends of the intermediate support block are fixedly connected to the inner air chamber, and the outer surface of the inner air chamber is fixedly connected to the outer air chamber through a flange, the side wall of the outer air chamber is connected to a main pipe, the main pipe is connected to the interior of the outer air chamber, both ends of the main pipe are fixedly connected to a valve seat, and a ball valve is provided inside the valve seat, the side surface of the ball valve is fixedly connected to a limiting rod, the side surface of the limiting rod is provided with a first limiting mechanism, and the lower end of the limiting rod is fixedly connected to a push plate, one end of the valve seat is fixedly connected to a sealing seat, and a sealing point I is provided inside the sealing seat, and a second limiting mechanism is provided inside the valve seat.

[0006] Preferably, the first limiting mechanism includes a limiting ring, and the limiting ring is sleeved on the side surface of the limiting rod. The limiting rod is slidably connected to the limiting ring, and a support rod is fixedly connected to the outer side surface of the limiting ring. One end of the support rod is fixedly connected to the inner side wall of the valve seat.

[0007] Preferably, the second limiting mechanism includes a limiting groove, and the limiting groove is located on the inner side wall of the valve seat and above the support rod. A sliding rod is slidably connected inside the limiting groove, and one end of the sliding rod is fixedly connected to the side surface of the ball valve.

[0008] Preferably, a second cavity is formed inside the sealing seat, and the second cavity corresponds to the sealing point I. A buffer mechanism is provided inside the second cavity.

[0009] Preferably, the buffer mechanism includes a first cavity, and the first cavity is located inside the second cavity. A spring is fixedly connected to the inner wall of the second cavity, and one end of the spring is fixedly connected to the sealing point I through a sealing gasket II.

[0010] Preferably, auxiliary pipelines are fixedly connected to the outer side surface of the sealing seat, and a discharge port is formed on the side surface of the auxiliary pipeline.

[0011] The utility model provides a pneumatic double diaphragm pump capable of conveying different liquids. Compared with the prior art, the following beneficial effects are achieved:

[0012] 1. Through the cooperation of the limiting rod, the support rod, the limiting ring inside the valve seat and the limiting groove and the sliding rod in the second limiting mechanism, the ball valve can be limited, so as to prevent the valve ball from moving up and down in the valve seat and hitting or rubbing against the inner wall of the valve seat during the operation of the diaphragm pump, and avoid friction damage to the ball valve, thereby prolonging the service life of the ball valve.

[0013] 2. Through the spring inside the sealing seat, the sealing point I and the ball valve inside the sealing seat can be buffered during the operation of the diaphragm pump, so as to reduce the impact force on the ball valve and the sealing point I, and avoid deformation and damage of the ball valve and the sealing point I caused by impact, thereby preventing the pipeline from being poorly sealed and affecting the working efficiency of the diaphragm pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the utility model;

[0015] Figure 2 is a schematic structural diagram of the valve seat in the utility model;

[0016] Figure 3 is for Figure 2 the internal structural diagram of;

[0017] Figure 4 Schematic diagram of the internal structure of the sealing seat in the present utility model.

[0018] In the figure: 1 intermediate support block, 2 outer air chamber, 3 valve seat, 301 ball valve, 302 push plate, 303 limit groove, 304 sliding rod, 305 limit rod, 4 auxiliary pipeline, 5 sealing seat, 501 first cavity, 502 spring, 503 second cavity, 504 sealing point I, 505 sealing gasket II, 6 air valve assembly, 7 support rod, 8 limit ring, 9 main pipeline, 10 inner air chamber. Specific implementation manner

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0020] Please refer to Figures 1-4 , the present utility model provides a technical solution: a pneumatic double diaphragm pump capable of transporting different liquids, including an intermediate support block 1, an outer air chamber 2, an air valve assembly 6 and an inner air chamber 10. Both ends of the intermediate support block 1 are fixedly connected with inner air chambers 10, and the outer surface of the inner air chamber 10 is fixedly connected with an outer air chamber 2 through a flange. There is a main pipeline 9 on the side wall of the outer air chamber 2, and the main pipeline 9 is internally connected to the outer air chamber 2. Both ends of the main pipeline 9 are fixedly connected with valve seats 3, and a ball valve 301 is arranged inside the valve seat 3. The side surface of the ball valve 301 is fixedly connected with a limit rod 305. A first limit mechanism is arranged on the side surface of the limit rod 305, and the lower end of the limit rod 305 is fixedly connected with a push plate 302. One end of the valve seat 3 is fixedly connected with a sealing seat 5, and a sealing point I 504 is arranged inside the sealing seat 5. A second limit mechanism is arranged inside the valve seat 3.

[0021] As a technical optimization solution of the present utility model, the first limit mechanism includes a limit ring 8, and the limit ring 8 is sleeved on the side surface of the limit rod 305. The limit rod 305 is slidably connected with the limit ring 8, and the outer surface of the limit ring 8 is fixedly connected with a support rod 7. One end of the support rod 7 is fixedly connected with the inner side wall of the valve seat 3, which can limit the ball valve 301 to prevent the ball valve 301 from contacting the inner wall of the valve seat 3 and causing friction when moving inside the valve seat 3.

[0022] As a technical optimization solution of the present utility model, the second limiting mechanism includes a limiting groove 303, and the limiting groove 303 is located on the inner side wall of the valve seat 3 and above the support rod 7. A sliding rod 304 is slidably connected inside the limiting groove 303, and one end of the sliding rod 304 is fixedly connected to the side surface of the ball valve 301, which can further limit the ball valve 301, prevent the ball valve 301 from rotating during the up and down movement, and further improve the stability of the ball valve 301.

[0023] As a technical optimization solution of the present utility model, a second cavity 503 is provided inside the sealing seat 5, and the second cavity 503 corresponds to the sealing point I 504. A buffer mechanism is provided inside the second cavity 503. The second cavity 503 can support the sealing point I 504, so that when the ball valve 301 moves to one side of the sealing point I 504, the pipeline can be tightly blocked.

[0024] As a technical optimization solution of the present utility model, the buffer mechanism includes a first cavity 501, and the first cavity 501 is located inside the second cavity 503. A spring 502 is fixedly connected to the inner wall of the second cavity 503, and one end of the spring 502 is fixedly connected to the sealing point I 504 through a sealing gasket II 505, which can buffer the sealing point I 504 and prevent the ball valve 301 from frequently hitting the sealing point I 504, resulting in deformation of the sealing point I 504 and causing the ball valve 301 to be poorly sealed.

[0025] As a technical optimization solution of the present utility model, auxiliary pipelines 4 are fixedly connected to the outer side surface of the sealing seat 5, and a discharge port is provided on the side surface of the auxiliary pipelines 4.

[0026] When the present utility model is in use, when the inner membrane inside the outer air chamber 2 is driven by the diaphragm pump to move, the ball valve 301 inside the valve seat 3 will also move accordingly. During the up and down movement of the ball valve 301, the ball valve 301 is limited by the limiting rod 305, the support rod 7, and the limiting ring 8. Therefore, the ball valve 301 will not collide with the inner wall of the valve seat 3, nor will there be up and down sliding friction. And due to the limitation of the limiting groove 303 and the sliding rod 304 in the second limiting mechanism on the ball valve 301, the ball valve 301 will not rotate and rub against the inner wall of the valve seat 3 either, reducing the possibility of damage to the ball valve 301 and prolonging the service life of the ball valve 301. When the ball valve 301 hits the sealing point I 504, the spring 502 inside the sealing seat 5 will buffer both the sealing point I 504 and the ball valve 301 at the same time. Therefore, the impact force between the ball valve 301 and the sealing point I 504 is reduced, thereby protecting both the ball valve 301 and the sealing point I 504 at the same time.

[0027] At the same time, the content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0028] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising said element.

[0029] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A pneumatic double diaphragm pump capable of transporting different liquids, comprising an intermediate support block (1), an outer air chamber (2), an air valve assembly (6) and an inner air chamber (10). Both ends of the intermediate support block (1) are fixedly connected with the inner air chamber (10), and the outer surface of the inner air chamber (10) is fixedly connected with the outer air chamber (2) through a flange. It is characterized in that: A main pipeline (9) is connected to the side wall of the outer air chamber (2). The main pipeline (9) is communicated with the inside of the outer air chamber (2). Both ends of the main pipeline (9) are fixedly connected with valve seats (3). A ball valve (301) is arranged inside the valve seat (3). A limiting rod (305) is fixedly connected to the side surface of the ball valve (301). A first limiting mechanism is arranged on the side surface of the limiting rod (305). The lower end of the limiting rod (305) is fixedly connected with a push plate (302). One end of the valve seat (3) is fixedly connected with a sealing seat (5). A sealing point I (504) is arranged inside the sealing seat (5). A second limiting mechanism is arranged inside the valve seat (3).

2. The pneumatic double diaphragm pump capable of conveying different liquids according to claim 1, wherein: The first limiting mechanism includes a limiting ring (8). The limiting ring (8) is sleeved on the side surface of the limiting rod (305). The limiting rod (305) is slidably connected with the limiting ring (8). A support rod (7) is fixedly connected to the outer side surface of the limiting ring (8). One end of the support rod (7) is fixedly connected with the inner side wall of the valve seat (3).

3. The pneumatic double diaphragm pump capable of transporting different liquids according to claim 2, characterized in that: The second limiting mechanism includes a limiting groove (303). The limiting groove (303) is located on the inner side wall of the valve seat (3) and above the support rod (7). A sliding rod (304) is slidably connected inside the limiting groove (303). One end of the sliding rod (304) is fixedly connected with the side surface of the ball valve (301).

4. The pneumatic double diaphragm pump capable of transporting different liquids according to claim 1, wherein: A second cavity (503) is formed inside the sealing seat (5). The second cavity (503) corresponds to the sealing point I (504). A buffer mechanism is arranged inside the second cavity (503).

5. The pneumatic double diaphragm pump capable of conveying different liquids according to claim 4, characterized in that: The buffer mechanism includes a first cavity (501). The first cavity (501) is located inside the second cavity (503). A spring (502) is fixedly connected to the inner wall of the second cavity (503). One end of the spring (502) is fixedly connected with the sealing point I (504) through a sealing gasket II (505).

6. The pneumatic double diaphragm pump capable of conveying different liquids according to claim 1, characterized in that: Auxiliary pipelines (4) are fixedly connected to the outer side surface of the sealing seat (5). A discharge port is formed on the side surface of the auxiliary pipeline (4).

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