Novel ball valve on diaphragm pump

Abstract

A novel ball valve on a diaphragm pump comprises a ball seat, a ball cage and a valve ball. The ball cage comprises a positioning ring, a supporting column, a connecting ring and a limiting ring. The four supporting columns are annularly arranged at intervals. The positioning ring, the supporting column, the connecting ring and the limiting ring are integrally formed. The end, away from the positioning ring, of the supporting column and the side, facing the valve ball, of the supporting column are provided with an inclined face part, the inclined face of the inclined face part faces the valve ball, and the spherical face of the valve ball abuts against the four inclined face parts. According to the novel ball valve on the diaphragm pump, a one-way channel of the valve ball is formed through the four supporting columns which are annularly arranged at intervals, and the maximum flow of a fluid medium can be guaranteed while movement of the valve ball is limited. And during assembly, the ball cage of the corresponding model can be selected according to the flow performance required by the pump, so that the simple and low-cost matching of the overall flow characteristic of the pump can be realized, and the main structure of the pump body or the ball valve does not need to be changed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of one-way valve equipment, in particular to a novel ball valve on a diaphragm pump. BACKGROUND

[0002] Pneumatic diaphragm pumps and other equipment generally use ball valves as key one-way valve components. The components usually include a ball seat, a ball cage, and a valve ball moving between them. The main role of the ball cage is to guide and limit the movement trajectory of the valve ball under the impact of the pumped medium, ensuring that it can accurately fall back onto the ball seat to achieve sealing. The ball cage in the prior art mostly adopts a closed or semi-closed cage. For example, Chinese patent CN201920366707.2 discloses a ball valve assembly for a pneumatic diaphragm pump and a pneumatic diaphragm pump, which includes: the end of the column has an open slot and a material port at the open end of the open slot; the ball seat is arranged at the bottom of the open slot; the bottom wall of the ball sleeve abuts against the top wall of the ball seat, and the top wall of the ball sleeve is located below the material port, the ball sleeve has a through hole passing through the upper and lower portions, the through hole includes a main body hole section, a transition hole section, and a reduced diameter hole section, and the inner peripheral wall of the through hole has a plurality of grooves passing through the upper and lower portions of the ball sleeve. This ball valve assembly can limit the movement stroke of the valve ball, but its structure is complex, the manufacturing cost is high, and the fluid medium passes through the grooves, resulting in large flow resistance and being unable to guarantee the flow of the fluid medium. SUMMARY

[0003] In view of the above, the present application provides a novel ball valve on a diaphragm pump to solve the above problems.

[0004] A novel ball valve on a diaphragm pump includes a ball seat, a ball cage arranged on one side of the ball seat, and a valve ball arranged in the ball cage. The ball cage includes a positioning ring, at least four support columns arranged around the positioning ring, a connecting ring arranged on the side of the four support columns away from the positioning ring, and a limiting ring arranged on the inner ring of the connecting ring. The inner diameter of the limiting ring is smaller than the diameter of the valve ball, the positioning ring, the support columns, the connecting ring, and the limiting ring are integrally formed, and the four support columns form a fluid passage therebetween.

[0005] Further, one end of the support column away from the positioning ring has a beveled portion toward the side of the valve ball.

[0006] Further, the inner diameter of the ball seat is smaller than the diameter of the valve ball, and the inner wall of the side of the ball seat toward the ball cage has a ring of tapered surface matching the valve ball.

[0007] Further, the outer diameter of the positioning ring is the same as the outer diameter of the ball seat.

[0008] Furthermore, the connecting ring is connected to the ends of the four pillars.

[0009] Furthermore, a reinforcing rib is provided between the connecting ring and the limiting ring, corresponding to the position of each of the pillars, and the reinforcing rib is integrally formed with the ball cage.

[0010] Compared with existing technologies, the novel ball valve on the diaphragm pump provided by this invention forms a one-way channel for the valve ball through four pillars arranged in a ring at intervals. This restricts the movement of the valve ball while ensuring the maximum flow rate of the fluid medium. The four pillars constitute a minimalist open spatial framework, optimally resolving the contradictions between limiting, guiding, lightweighting, and low-cost manufacturing. Furthermore, during assembly, the appropriate ball cage model can be selected according to the required flow performance of the pump, achieving simple and low-cost matching of the overall flow characteristics of the pump without altering the main structure of the pump body or ball valve. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of the novel ball valve on the diaphragm pump provided by the present invention.

[0012] Figure 2 for Figure 1 A schematic diagram of the ball seat structure of the new ball valve on the diaphragm pump.

[0013] Figure 3 for Figure 1 A schematic diagram of the ball cage structure of the new ball valve on the diaphragm pump.

[0014] Figure 4 for Figure 1 A schematic diagram of the cross-section of a new type of ball valve assembled in a column on a diaphragm pump. Detailed Implementation

[0015] The following provides a more detailed description of specific embodiments of the present invention. It should be understood that the description of the embodiments of the present invention herein is not intended to limit the scope of protection of the present invention.

[0016] like Figure 1 The diagram shown is a structural schematic of the novel ball valve on a diaphragm pump provided by the present invention. The novel ball valve on the diaphragm pump includes a ball seat 10, a ball cage 20 disposed on one side of the ball seat 10, and a valve ball 30 disposed within the ball cage 20. It is conceivable that the novel ball valve on the diaphragm pump also includes other functional modules, such as a column module, a material flow module, etc., which are technologies known to those skilled in the art and will not be described in detail here.

[0017] Please refer to the following: Figures 2 to 4The new ball valve on the diaphragm pump is installed in a stand 40 of a diaphragm pump, the ball seat 10 is an annular base with an outer diameter slightly larger than the inner diameter of the stand 40, so that the ball seat 10 is pressed into the stand 40 by pressure, and the radial pressure is generated by the elastic deformation of the ball seat 10 itself to realize the sealing assembly.

[0018] The inner diameter of the ball seat 10 is smaller than the diameter of the valve ball 30, and the inner wall of the side of the ball seat 10 towards the ball cage 20 has a ring of tapered surface 11 matched with the valve ball 30. When the valve ball 30 moves towards the ball seat 10 under the pressure of the fluid medium, the spherical surface of the valve ball 30 abuts on the tapered surface 11 to close the flow passage and realize the flow control of the fluid medium.

[0019] The ball cage 20 includes a positioning ring 21, at least four spacer rings arranged on the positioning ring 21, a connecting ring 23 arranged on the side of the four spacer rings 22 away from the positioning ring 21, and a limiting ring 24 arranged on the inner ring of the connecting ring 23.

[0020] The outer diameter of the positioning ring 21 is the same as the outer diameter of the ball seat 10, and the end face of the positioning ring 21 away from the spacer ring 22 serves as a mounting reference surface. When assembling, the ball cage 20 is first pressed into the stand 40, then the valve ball 30 is put in, and then the ball seat 10 is abutted on the positioning ring 21 and continuously pressed in until the ball seat 10 is completely entered into the stand 40, so that the installation and positioning of the ball seat 10 and the ball cage 20 are completed.

[0021] The end of the spacer ring 22 away from the positioning ring 21 and towards the valve ball 30 has a beveled portion 25, and the end of the beveled portion 25 fixes the connecting ring 23 and the limiting ring 24 together, so that the positioning ring 21, the spacer ring 22, the connecting ring 23, and the limiting ring 24 are integrally formed. Specifically, the ball cage 20 can be integrally formed as a complete part by injection molding process.

[0022] The four spacer rings 22 are annularly arranged, so as to limit the moving distance of the valve ball 30 in the radial direction, form a one-way channel in the operation of the ball, and ensure that the valve ball 30 can accurately fall to the central position of the ball seat 10 each time the ball valve is closed, greatly improving the sealing reliability and consistency of the one-way valve.

[0023] The side wall of the spacer ring 22 away from the valve ball 30 is in spaced contact with the inner side wall of the stand 40, and the space between the four spacer rings 22 serves as a flow direction channel for the fluid medium, which can ensure the maximum flow of the fluid medium and greatly reduce the resistance influence on the fluid.

[0024] The connecting ring 23 is connected to the ends of the four support pillars 22 to form a stable ball cage structure, thereby strengthening the structural strength of the ball cage 20. A reinforcing rib 26 is provided between the connecting ring 23 and the limiting ring 24, corresponding to the position of each support pillar 22. This reinforcing rib 26 is integrally formed with the ball cage 20 to enhance the structural strength between the connecting ring 23 and the limiting ring 24.

[0025] The inner diameter of the limiting ring 24 is smaller than the diameter of the valve ball 30 to block the valve ball 30 from passing through. This limits the axial movement distance of the valve ball 30, preventing the valve ball 30 from directly impacting the column 40. This effectively buffers the impact kinetic energy of the valve ball 30, extends the service life of the pump body components, and significantly reduces operating noise.

[0026] The inclined surface of the inclined portion 25 faces the valve ball 30. When the valve ball 30 moves toward the limiting ring 24 under the pressure of the fluid medium, the spherical surface of the valve ball 30 will abut against the four inclined portions 25, and the fluid medium will flow freely directly between the four pillars 22, between the connecting ring 23 and the limiting ring 24, and between the valve ball 30 and the limiting ring 24, so as to maximize the flow space of the fluid medium and ensure the normal operation of the check valve.

[0027] During a single opening and closing cycle of the ball valve, the valve ball 30 moves under the pressure of the fluid medium from the ball seat 10 to the limiting ring 24, and then back to the ball seat 10. The round trip distance traveled by the valve ball 30 is the length of the support column 22. Therefore, the length of the support column 22 directly determines the movement distance of the valve ball 30, which in turn directly affects the maximum flow rate of the fluid medium. Thus, by designing different models of the ball cage 20 and manufacturing support columns 22 of different lengths, ball cages 20 with different maximum flow characteristics can be set. During assembly, the corresponding model of ball cage 20 can be selected according to the required flow performance of the pump, achieving simple and low-cost matching of the overall flow characteristics of the pump without changing the main structure of the pump body or ball valve.

[0028] Compared with existing technologies, the novel ball valve on the diaphragm pump provided by this invention forms a unidirectional channel for the valve ball 30 through four pillars 22 arranged in a ring at intervals. This restricts the movement of the valve ball 30 while ensuring the maximum flow rate of the fluid medium. The four pillars 22 constitute a minimalist open spatial frame, optimally resolving the contradictions between limiting, guiding, lightweighting, and low-cost manufacturing. Furthermore, during assembly, the corresponding model of ball cage 20 can be selected according to the required flow performance of the pump, achieving simple and low-cost matching of the overall flow characteristics of the pump without changing the main structure of the pump body or ball valve.

[0029] The above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions or improvements within the spirit of the present invention are covered within the scope of the claims of the present invention.

Claims

1. A new type of ball valve on a diaphragm pump, characterized by: The new ball valve on the diaphragm pump comprises a ball seat, a ball cage arranged on one side of the ball seat, and a valve ball arranged in the ball cage, the ball cage comprises a positioning ring, at least four spacer rings around the support arranged on the positioning ring, a connecting ring arranged on the side of the four supports away from the positioning ring, and a limiting ring arranged in the inner ring of the connecting ring, the inner diameter of the limiting ring is smaller than the diameter of the valve ball, the positioning ring, the support, the connecting ring, and the limiting ring are integrally formed, and the four supports form a fluid passage.

2. The new ball valve on diaphragm pump as claimed in claim 1, wherein: The end of the support away from the positioning ring has a beveled portion toward the side of the valve ball.

3. The new ball valve on diaphragm pump as claimed in claim 1, wherein: The inner diameter of the ball seat is smaller than the diameter of the valve ball, and the inner wall of the side of the ball seat toward the ball cage has a taper surface matched with the valve ball.

4. The new ball valve on diaphragm pump as claimed in claim 1, wherein: The outer diameter of the positioning ring is the same as the outer diameter of the ball seat.

5. The new ball valve on diaphragm pump as claimed in claim 1, wherein: The connecting ring is connected to the end of the four supports.

6. The new ball valve on diaphragm pump as claimed in claim 1, wherein: The connecting ring and the limiting ring respectively have a reinforcing rib corresponding to the position of each support, and the reinforcing rib is integrally formed with the ball cage.

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