A three-ball diaphragm pump

Abstract

The present invention discloses a three-ball diaphragm pump, which comprises a diaphragm pump body, diaphragms on both sides and a partial cover, wherein the partial cover is connected and fixed to the diaphragm pump body, and the diaphragm seals and isolates the two; the two sides of the diaphragm pump body are symmetrical chamber disks, the lower side of the symmetrical chambers is connected by an axial inlet channel, a through central axis groove is provided at the axial position, and the upper side is connected by an axial outlet channel; a reversing valve slot seat is also provided between the symmetrical chamber disks for placing a reversing valve. The valve seat of the present invention is integrally formed, and the valve seat is integrally formed, which is conducive to the disassembly of the ball cone seal, and the structural design is reasonable. At the same time, the three-ball double diaphragm pump is different from the traditional four-ball double diaphragm pump, and can perform reversing sealing more quickly and reduce pulses.

Description

Technical Field

[0001] The invention relates to the field of diaphragm pumps, in particular to a three-ball diaphragm pump. Background Art

[0002] The diaphragm pump, also known as the control pump, is the main type of actuator. It receives the control signal output by the modulation unit and uses power operation to change the fluid flow. When the diaphragm pump is used, a valve body is provided on it to control the flow direction of the liquid.

[0003] Traditional diaphragm pumps are mostly two-ball or four-ball diaphragm pumps. Two-ball diaphragm pumps are single diaphragm pumps, and four-ball diaphragm pumps are double diaphragm pumps. The pulses generated by the movement of the sealing balls of the diaphragm pumps are the heavy pressure factors that affect the function of the diaphragm pumps. In the four-ball diaphragm pumps, the pulses generated by the four balls will inevitably affect the reversing of the double diaphragm pumps.

[0004] At the same time, the valve body of the existing diaphragm pump adopts a split design. When the ball-cone seal is loaded into the diaphragm pump, the ball-cone seal will be difficult to disassemble due to the drying and solidification of the liquid during long-term use. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a three-ball diaphragm pump with an integrally formed valve seat, which is convenient for disassembly of the ball-cone seal and has a reasonable structural design. At the same time, the three-ball double diaphragm pump is different from the traditional four-ball double diaphragm pump and can perform reversing sealing more quickly and reduce pulses.

[0006] To achieve the above object, the technical solution adopted by the present invention is: a three-ball diaphragm pump, comprising a diaphragm pump body, diaphragms on both sides and a partial cover, the partial cover is connected and fixed to the diaphragm pump body, and the diaphragm seals and isolates the two;

[0007] The two sides of the diaphragm pump body are symmetrical chamber disks, the lower side of the symmetrical chambers is connected by an axial inlet channel, a through-through central axis groove is provided at the axial center position, and the upper side is connected by an axial outlet channel;

[0008] The central axis groove is used to set the central axis to connect the diaphragms on both sides with the chamber discs. A reversing valve groove seat is also provided between the symmetrical chamber discs for placing the reversing valve, which is located between the inlet channel and the outlet channel in the vertical direction;

[0009] A liquid inlet is provided at the center of the inlet channel, a liquid outlet is provided at the center of the outlet channel, and a ball valve assembly is also provided inside the outlet channel;

[0010] The ball valve assembly includes a ball valve seat and a first sealing ball. The ball valve seat with a hollow interior is symmetrically arranged at both ends of the outlet channel. The opposite surfaces of the inner side of the ball valve seat are ball cone surfaces. The first sealing ball is arranged between the symmetrical ball cone surfaces. The outer side of the ball valve seat is a sealing platform, and a sealing groove is also arranged on its circumferential surface.

[0011] The upper and lower ends of the partial cover are both provided with protruding valve seat supplementary inlets for accessing the integrated valve seat. The partial cover is also provided with a liquid channel opening at the valve seat supplementary inlet position on the inner surface, and the liquid channel opening is connected with the inlet channel and the outlet channel.

[0012] Furthermore, the integrated valve seat is composed of a ball-cone sealing section, an inlet section, a threaded section and a nut end from top to bottom, the threaded section to the ball-cone sealing is hollow, the upper end of the ball-cone sealing section is an inwardly buckled conical surface, and a sealing groove is provided on its outer surface, the inlet section is provided with a plurality of circular inlets connected to the liquid channel port, and a second sealing ball is provided between the ball-cone sealing section and the retaining column;

[0013] Furthermore, the ball valve seat is threadedly connected to both ends of the outlet channel, and a T-shaped sealing sheet is embedded in the sealing platform on the outside thereof;

[0014] Furthermore, the outlet channel is also provided with an external interface, which is closed or externally connected to a storage tank.

[0015] When the three-ball diaphragm pump is in use, liquid enters the inlet channel from the liquid inlet, and then, under the action of the reversing valve and the integrated valve seat, can enter the outlet channel from the left chamber or the right chamber of the partial cover. In the outlet channel, the ball valve is different from the traditional ball valve. It has a single-ball design and controls the opening and closing of the two-way ball valve seat, so that the liquid is discharged from the liquid outlet.

[0016] The reversing valve adopts a pneumatic reversing valve, so this diaphragm pump can be used in dangerous liquid industries such as the chemical industry, such as the transportation of coal mine sewage.

[0017] In summary, the valve seat of the present invention is integrally formed, which is conducive to the disassembly of the ball-cone seal and has a reasonable structural design. At the same time, the three-ball double diaphragm pump is different from the traditional four-ball double diaphragm pump and can perform reversing sealing more quickly and reduce pulses. Moreover, the overall cost of the diaphragm pump is low and can be used in dangerous industries such as chemical industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the cross-section of the ball valve assembly structure;

[0020] Figure 3 It is a schematic diagram of the front and back structures of the partial cover of the present invention;

[0021] Figure 4 It is a schematic diagram of the integrated valve seat structure.

[0022] in:

[0023] 1. Diaphragm pump body; 2. Diaphragm; 3. Partial cover; 4. Ball valve assembly; 5. Integrated valve seat; 11. Chamber disk; 12. Inlet channel; 121. Liquid inlet; 13. Center axis groove; 14. Outlet channel; 141. Liquid outlet; 142. External interface; 15. Reversing valve groove seat; 31. Valve seat supplementary inlet; 32. Liquid channel outlet; 33. Block column; 41. Ball valve seat; 411. Ball cone surface; 412. Sealing platform; 413. Sealing groove; 42. First sealing ball; 43. T-type sealing sheet; 51. Ball cone sealing section; 511. Conical surface; 512. Sealing groove; 52. Inlet section; 521. Circular inlet; 53. Threaded section; 54. Nut end. DETAILED DESCRIPTION

[0024] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0025] Embodiment 1:

[0026] A three-ball diaphragm pump, such as Figure 1 As shown, it includes a diaphragm pump body 1, diaphragms 2 on both sides and a partial cover 3. The partial cover 3 is connected and fixed to the diaphragm pump body 1, and the diaphragm 2 seals and isolates the two.

[0027] Specifically, the diaphragm pump body 1 has symmetrical chamber disks 11 on both sides, the lower side of the symmetrical chamber disk 11 is connected by an axial inlet channel 12, a through center axis groove 13 is provided at the axial position, and the upper side is connected by an axial outlet channel 14, the center axis groove 13 is used to set the center axis to connect the diaphragms 2 on both sides with the chamber disk 11, specifically forming an inner gas chamber of the diaphragm 2 and the chamber disk 11, and a reversing valve groove seat 15 is also provided between the symmetrical chamber disks 11 for placing a reversing valve, which is located between the inlet channel 12 and the outlet channel 14 in the vertical direction, and the reversing valve specifically acts on the gas chamber.

[0028] A liquid inlet 121 is provided at the center of the inlet channel 12, a liquid outlet 141 is provided at the center of the outlet channel 14, and a ball valve assembly 4 is also provided inside the outlet channel 14, which is used to control the liquid to enter from the inner cavity of the left side cover 3 or from the inner cavity of the right side cover 3.

[0029] Continue to refer to the attached Figure 2The ball valve assembly 4 includes a ball valve seat 41 and a first sealing ball 42. The ball valve seat 41 with a hollow interior is symmetrically arranged at both ends of the outlet channel 14. The opposite surfaces close to the inner side of the ball valve seat 41 are ball cone surfaces 411. A first sealing ball 42 is arranged between the symmetrical ball cone surfaces 411. The outer side of the ball valve seat 41 is a sealing platform 412. The ball valve seat 41 is threadedly connected to both ends of the outlet channel 14. The sealing platform 412 on the outer side is embedded with a T-shaped sealing sheet 43. The T-shaped sealing sheet 43 is used for sealing and isolating the outer side of the thread of the ball valve seat 41 from the liquid, and a sealing ring is arranged in the sealing groove 413 arranged on the circumferential surface for sealing and isolating the inner side of the thread from the liquid, thereby ensuring that the liquid flow path is only the hollow position inside the ball valve seat 41.

[0030] It is worth noting that the first sealing ball 42 can fully fit with the ball cone surface 411 to achieve a sealing effect. At the same time, the diameter of the first sealing ball 42 is larger than the inner diameter of the liquid outlet 141, so that it can only move in the outlet channel 14 and only between the ball cone surfaces 141.

[0031] Continue to refer to the attached Figure 3 The upper and lower ends of the partial cover 3 are provided with a protruding valve seat supplementary inlet 31 for accessing the integrated valve seat 5. The partial cover 3 is also provided with a liquid channel port 32 at the position of the valve seat supplementary inlet 31 on the inner surface. Figure 4 The integrated valve seat 5 is composed of a ball-cone sealing section 51, an inlet section 52, a threaded section 53 and a nut end 54 from top to bottom. The interior from the threaded section 53 to the ball-cone sealing section 51 is hollow. The upper end of the ball-cone sealing section 51 is an inwardly buckled conical surface 511, and a sealing groove 512 is provided on its outer surface. The inlet section 52 is provided with a plurality of circular inlets 521 connected to the liquid channel port 32. A second sealing ball is provided between the ball-cone sealing section 51 and the blocking column 33. The ball-cone sealing section 51 and the blocking column 33 can completely control the movement of the second sealing ball therebetween to prevent the second sealing ball from entering the inner chamber of the partial cover 3.

[0032] When the integrated valve seat 5 is connected to the valve seat supplementary inlet 31, a sealing gasket is provided at the nut end 54, and a sealing ring is provided in the sealing groove 512, and the circular inlet 521 is connected to the inlet channel 12. The integrated valve seat 5 is conducive to the disassembly of the ball-cone seal and has a reasonable structural design.

[0033] Preferably, the outlet channel 14 is further provided with an external interface 142, which is closed or connected to an external storage tank. At the same time, the reversing valve adopts a pneumatic reversing valve, so the diaphragm pump can be used in hazardous liquid industries such as the chemical industry, such as the transportation of coal mine sewage.

[0034] During operation, liquid enters the inlet channel 12 from the liquid inlet 121, and then, under the action of the reversing valve and the integrated valve seat 5, can enter the outlet channel 14 from the left chamber or the right chamber of the partial cover 3. In the outlet channel 14, the ball valve is different from the traditional ball valve. It has a single ball design and controls the opening and closing of the two-way ball valve seat 41, so that the liquid is discharged from the liquid outlet 141.

[0035] Taking the case where liquid enters the left chamber of the partial cover 3 as an example, the liquid enters the inlet channel 12 from the liquid inlet 121. At this time, under the action of the reversing valve, the second sealing ball of the right-side integrated valve seat 5 falls into the ball-cone sealing section 51 and seals with the conical surface 511. At this time, the second sealing ball of the left-side integrated valve seat 5 is separated from the ball-cone sealing section 51, and the liquid enters the chamber formed by the partial cover 3 and the diaphragm from the circular inlet 521, and enters the ball valve assembly 4 at the upper end. The first sealing ball 42 in the ball valve assembly 4 is now in contact with the ball cone surface 411 on the right side, so the liquid can be discharged from the liquid outlet 141.

[0036] When the liquid enters from the right side chamber of the partial cover 3, its working mechanism is similar to that of the left side, which will not be described in detail here.

[0037] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent transformation or modification made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A three-ball diaphragm pump, comprising a diaphragm pump body (1), diaphragms (2) on both sides and a partial cover (3), Features: The partial cover (3) is connected and fixed to the diaphragm pump body (1), and the diaphragm (2) seals and isolates the two. The diaphragm pump body (1) has symmetrical chamber discs (11) on both sides, the lower side of the symmetrical chamber disc (11) is connected by an axial inlet channel (12), a through-going central axis groove (13) is provided at the axial center, and the upper side is connected by an axial outlet channel (14); The central axis groove (13) is used to set a central axis to connect the diaphragms (2) on both sides with the chamber discs (11); a reversing valve groove seat (15) is also provided between the symmetrical chamber discs (11) for placing a reversing valve, which is located between the inlet channel (12) and the outlet channel (14) in the vertical direction; A liquid inlet (121) is provided at the center of the inlet channel (12), a liquid outlet (141) is provided at the center of the outlet channel (14), and a ball valve assembly (4) is also provided inside the outlet channel (14); The ball valve assembly (4) comprises a ball valve seat (41) and a first sealing ball (42); the ball valve seat (41) having a hollow interior is symmetrically arranged at two ends of the outlet passage (14); the opposite surfaces of the inner side of the ball valve seat (41) are ball cone surfaces (411); the first sealing ball (42) is arranged between the symmetrical ball cone surfaces (411); the outer side of the ball valve seat (41) is a sealing platform (412), and a sealing groove (413) is also arranged on the circumferential surface of the sealing platform; The upper and lower ends of the partial cover (3) are both provided with a protruding valve seat replenishing inlet (31) for connecting to the integrated valve seat (5), and the partial cover (3) is also provided with a liquid channel opening (32) at the position of the valve seat replenishing inlet (31) on the inner surface. A blocking column (33) is also provided at a position where the valve seat filling inlet (31) at the bottom communicates with the inner side of the partial cover (3). The integrated valve seat (5) comprises, from top to bottom, a spherical cone sealing section (51), an inlet section (52), a threaded section (53) and a nut end (54); the interior of the threaded section (53) to the spherical cone sealing section (51) is hollow; the upper end of the spherical cone sealing section (51) is an inwardly buckled conical surface (511), the outer surface of which is provided with a sealing groove (512); the inlet section (52) is provided with a plurality of circular inlets (521) connected to the liquid channel opening (32); a second sealing ball is provided between the spherical cone sealing section (51) and the blocking column (33); The ball valve seat (41) is threadedly connected to both ends of the outlet channel (14), and the sealing platform (412) on the outside thereof is embedded with a T-shaped sealing sheet (43). The outlet channel (14) is further provided with an external interface (142), and the external interface (142) is closed or externally connected to a storage tank. A sealing gasket is provided at the nut end (54), and a sealing ring is provided in the sealing groove (512).

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