Highly reliable diaphragm structure and corresponding diaphragm pump

Abstract

The utility model provides a kind of high-reliability diaphragm structure and corresponding diaphragm pump, diaphragm structure includes including diaphragm body and connecting rod, diaphragm body includes push block, deformation membrane and diaphragm panel. Two sides of diaphragm panel are pump cavity and connecting rod respectively, the end face of push block away from pump cavity is provided with buckle groove, annular clamping groove is provided on the inner circumferential side wall of buckle groove, the connecting surface of connecting rod is provided with buckle block, the outer circumferential side of buckle block is provided with the convex ring part for cooperating with annular clamping groove, when buckle block is connected with buckle groove, the end face of push block and connecting surface are in contact. Deformation membrane is connected between push block and the inner wall of through-hole, push block protrudes diaphragm panel close to one side of pump cavity, the side close to pump cavity of deformation membrane is convex side, the distance between the convex side of deformation membrane and diaphragm panel is greater than the distance between the end face of push block and diaphragm panel. The connection of diaphragm body and connecting rod is reliable, the bending of deformation membrane is small, the deformation space of deformation membrane is large, and the service life of diaphragm structure is long.

Description

Technical Field

[0001] This utility model relates to the field of diaphragm pumps, and in particular to a highly reliable diaphragm structure and a corresponding diaphragm pump. Background Technology

[0002] A diaphragm pump is a device that transports fluids through the periodic reciprocating motion of a flexible diaphragm. The diaphragm structure, as the core structure of the pump, directly determines the overall pump performance based on its reliability. In existing technologies, long-term operation has revealed problems with diaphragm structures, including unreliable connections and the diaphragm itself being prone to rupture, leading to a short lifespan.

[0003] Therefore, it is necessary to provide a highly reliable diaphragm structure and a corresponding diaphragm pump to solve the above-mentioned technical problems. Utility Model Content

[0004] This invention provides a highly reliable diaphragm structure and a corresponding diaphragm pump to solve the problems of unreliable diaphragm structure connection and easy breakage leading to short lifespan in existing diaphragm pumps.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is: a highly reliable diaphragm structure, which includes: a diaphragm body and a connecting rod, wherein the diaphragm body includes a pusher block, a deformable membrane and a diaphragm panel; The diaphragm panel has a pump chamber on one side and a connecting rod on the other side. The push block has a snap-fit ​​groove on its end face away from the pump chamber. The snap-fit ​​groove has an annular groove on its inner circumferential side wall. The connecting surface on one side of the connecting rod has a snap-fit ​​block. The snap-fit ​​block has a protruding ring on its outer circumferential side for engaging with the annular groove. When the snap-fit ​​block is connected to the snap-fit ​​groove, the end face of the push block is in contact with the connecting surface. The diaphragm panel has a through hole, one end of the pusher is located in the through hole, and the deformable membrane is connected around the periphery of one end of the pusher. The deformable membrane is connected between the pusher and the inner wall of the through hole. In its natural state, the pusher protrudes from the side of the diaphragm panel near the pump cavity. The side of the deformable membrane near the pump cavity is the protruding side. The distance between the protruding side of the deformable membrane and the diaphragm panel is greater than the distance between the end face of the pusher and the diaphragm panel.

[0006] In this invention, the diaphragm is made of rubber, and a tightening protrusion is provided on the outer periphery of the end of the push block away from the pump cavity. The tightening protrusion and the push block are integrally formed.

[0007] In this invention, a compression sleeve is slidably sleeved on the outer periphery of the end of the push block that is away from the pump cavity, and the compression sleeve is interference-fitted with the push block.

[0008] In this utility model, an annular retaining edge is provided on the connecting surface. When the snap-fit ​​block is connected to the snap-fit ​​groove, the push block is limited to the inner side of the annular retaining edge.

[0009] In this utility model, a positioning protrusion is provided on the connecting surface, and a positioning groove is provided on the end face of the push block away from the pump cavity. When the snap block is connected to the snap groove, the positioning protrusion and the positioning groove are positioned and inserted.

[0010] In this invention, the deformable membrane is bent and connected between the push block and the inner wall of the through hole. The deformable membrane includes a first connecting end, a second connecting end, and a plurality of bent segments, which are connected between the first connecting end and the second connecting end. The bent section is connected to the push block through the first connecting end, and the thickness of the first connecting end gradually decreases as the push block points towards the bent section. The bent section is connected to the diaphragm panel via the second connecting end, and the inner surface of the second connecting end is flush with the inner surface of the through hole.

[0011] Among them, the lengths of multiple bent segments are equal.

[0012] In addition, the included angles between adjacent bending segments are equal.

[0013] In this invention, the push block, the deformation membrane, and the diaphragm panel are integrally formed. The first connecting end is connected to the circumferential edge of the push block, and the second connecting end is connected to the outer surface edge of the through hole.

[0014] This utility model also includes a diaphragm pump that uses the above-mentioned highly reliable diaphragm structure. The diaphragm pump also includes an input umbrella valve, an output umbrella valve, a valve cover, a valve support, a diaphragm support, a base, a connecting shaft, a crank, and a motor. The valve cover and the valve support are connected, and an input cavity and an output cavity are connected between the valve cover and the valve support. The valve cover is provided with an input hole communicating with the input cavity and an output hole communicating with the output cavity. The diaphragm support is connected to the side of the valve support away from the valve cover. The pump cavity is formed between the diaphragm support and the valve support. The pump cavity is connected to the input cavity and the output cavity. The input umbrella valve is unidirectionally sealed in the input cavity and the pump cavity. The output umbrella valve is unidirectionally sealed in the output cavity and the pump cavity. The base is connected between the motor and the diaphragm support, the crank is connected to the output end of the motor, the connecting rod is connected to the crank through the connecting shaft, the diaphragm panel is pressed between the diaphragm support and the valve support, and the crank rotates to drive the diaphragm structure to compress or expand the space of the pump chamber; The diaphragm panel has an annular protrusion around the deformable membrane on the side near the pump chamber, and the valve bracket has an annular groove on one side for positioning and engaging with the annular protrusion. The diaphragm panels of multiple diaphragm structures are connected as one unit, and multiple annular protrusions are intersected and connected.

[0015] Compared with the prior art, the advantages of this invention are as follows: The highly reliable diaphragm structure of this invention not only forms a snap-fit ​​connection between the diaphragm body and the connecting rod, but also limits the push block through the connecting surface of the connecting rod, making the connection reliable and stable. On the other hand, the push block of the diaphragm body protrudes from the side of the diaphragm panel near the pump cavity, so that when the pump cavity is compressed, the push block stretches the deformable membrane of the bent structure, which can reduce the bending of the deformable membrane. At the same time, the protruding side of the deformable membrane is higher than the end face of the diaphragm panel and the push block, and the deformation space of the deformable membrane is large, which can improve the service life of the diaphragm structure. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments are briefly introduced below. The drawings described below are only the corresponding drawings of some embodiments of this utility model.

[0017] Figure 1 This is a schematic diagram of the exploded structure of the diaphragm pump of this utility model.

[0018] Figure 2 This is a schematic diagram of the first embodiment of the highly reliable diaphragm structure of this utility model.

[0019] Figure 3 This is a cross-sectional view of the first embodiment of the highly reliable diaphragm structure of this utility model.

[0020] Figure 4 This is a cross-sectional view of a second embodiment of the highly reliable diaphragm structure of this utility model.

[0021] Figure 5 This is a cross-sectional view of the third embodiment of the highly reliable diaphragm structure of this utility model.

[0022] Figure 6 This is a cross-sectional view of the fourth embodiment of the highly reliable diaphragm structure of this utility model.

[0023] Figure 7 This is a partial enlarged view of the deformable membrane of the highly reliable diaphragm structure of this utility model. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0025] The directional terms mentioned in this utility model, such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", "top" and "bottom", are only for reference to the orientation of the accompanying drawings. The directional terms used are for the purpose of explaining and understanding this utility model, and are not intended to limit this utility model.

[0026] The terms "first" and "second" in this utility model are used for descriptive purposes only and should not be construed as indicating or implying relative importance, nor as a restriction on the order of events.

[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, a connection can be a detachable connection or a connection of an integral structure; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components or an interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] Existing diaphragm structures often exhibit unreliable connections and are prone to rupture, leading to short lifespans, during long-term operation.

[0029] The following is a preferred embodiment of a diaphragm pump provided by this utility model that can solve the above technical problems.

[0030] Please refer to Figure 1 ,in Figure 1 This is a schematic diagram of the exploded structure of the diaphragm pump of this utility model.

[0031] In the diagram, units with similar structures are represented by the same labels.

[0032] This embodiment provides a diaphragm pump, which includes a highly reliable diaphragm structure, an input umbrella valve 15, an output umbrella valve 14, a valve cover 11, a valve support 12, a diaphragm support 13, a base 1A, a connecting rod 17, a connecting shaft 18, a crank 19, and a motor 1B.

[0033] The valve cover 11 and valve support 12 are connected, with an input chamber and an output chamber between them. The valve cover 11 is provided with an input hole communicating with the input chamber and an output hole communicating with the output chamber. A sealing gasket 1C can be provided between the valve cover 11 and the valve support 12 to form a sealed input chamber and output chamber. The diaphragm support 13 is connected to the side of the valve support 12 away from the valve cover 11, and a pump chamber 131 is formed between the diaphragm support 13 and the valve support 12. The pump chamber 131 communicates with the input chamber and the output chamber. The input umbrella valve 15 is unidirectionally sealed within the input chamber and the pump chamber 131, and the output umbrella valve 14 is unidirectionally sealed within the output chamber and the pump chamber 131.

[0034] The base 1A is connected between the motor 1B and the diaphragm support 13. The crank 19 is connected to the output end of the motor 1B. The connecting rod 17 is connected to the crank 19 via the connecting shaft 18. The diaphragm panel 163 is pressed between the diaphragm support 13 and the valve support 12. The motor 1B drives the crank 19 to rotate, thereby driving the diaphragm structure to compress or expand the space of the pump chamber 131.

[0035] Please refer to Figure 2 and Figure 3 The highly reliable diaphragm structure of this embodiment includes a diaphragm body 16 and a connecting rod 17. The diaphragm body 16 includes a pusher 161, a deformable membrane 162, and a diaphragm panel 163.

[0036] One side of the diaphragm panel 163 is the pump chamber 131, and the other side of the diaphragm panel 163 is provided with a connecting rod 17. The end face of the push block 161 facing away from the pump chamber 131 is provided with a snap-fit ​​groove 1611. The inner circumferential side wall of the snap-fit ​​groove 1611 is provided with an annular snap-fit ​​groove 1612. The connecting surface on one side of the connecting rod 17 is provided with a snap-fit ​​block 171. The outer circumferential side of the snap-fit ​​block 171 is provided with a protruding ring portion 1711 for cooperating with the annular snap-fit ​​groove 1612. When the snap-fit ​​block 171 is connected to the snap-fit ​​groove 1611, the end face of the push block 161 is in contact with the connecting surface, and the connection is reliable and stable.

[0037] A through hole is provided on the diaphragm panel 163. One end of the pusher block 161 is located inside the through hole. A deformable membrane 162 is connected around the periphery of one end of the pusher block 161. The deformable membrane 162 is connected between the pusher block 161 and the inner wall of the through hole. In its natural state, the pusher block 161 protrudes from the side of the diaphragm panel 163 near the pump chamber 131, and the side of the deformable membrane 162 near the pump chamber 131 is the convex side. The distance between the convex side of the deformable membrane 162 and the diaphragm panel 163 is greater than the distance between the end face of the pusher block 161 and the diaphragm panel 163. That is, Figure 3 From this perspective, the convex side of the deformable membrane 162 is higher than the end face of the diaphragm panel 163 and the pusher block 161, which can reduce the bending of the deformable membrane. At the same time, the deformable membrane 162 has a large deformation space, which can improve the service life of the diaphragm structure 16.

[0038] The diaphragm in this embodiment is made of rubber, which has a certain degree of hardness and good elastic deformation ability.

[0039] Optionally, a tightening ring may be provided on the outer periphery of the end of the pusher block 161 facing away from the pump chamber 131, and the tightening ring and the pusher block 161 are integrally formed. The tightening ring can also refer to... Figure 4 The tightening sleeve in the middle. The setting of the tightening protrusion ring can enhance the strength of the push block 161, so that the locking block 171 and the locking groove 1611 can be connected very firmly, and the locking block 171 is not easy to fall out of the locking groove 1611. However, the disadvantage is that the locking block 171 is also more difficult to assemble into the locking groove 1611.

[0040] Please refer to Figure 4 Optionally, a compression sleeve 21 can be slidably fitted onto the outer periphery of the end of the push block 161 away from the pump chamber 131. The compression sleeve 21 is interference-fitted with the push block 161. Applying external force to the compression sleeve 21 can overcome the interference force between the compression sleeve 21 and the push block 161, allowing the compression sleeve 21 to slide. When it is necessary to disassemble or assemble the latching block 171 and the latching groove 1611, slide the compression sleeve 21 away from the connecting rod 17 to make the latching groove 1611 easier to open, thereby improving the ease of disassembly and assembly of the latching block 171 and the latching groove 1611. After the latching block 171 and the latching groove 1611 are connected, slide the compression sleeve 21 to the outer periphery of the end of the push block 161 near the connecting rod 17, which can lock the connection between the latching block 171 and the latching groove 1611.

[0041] Please refer to Figure 5 Optionally, an annular retaining edge 22 can be provided on the connecting surface of the connecting rod 17. When the latching block 171 is connected to the latching groove 1611, the push block 161 is limited to the inner side of the annular retaining edge 22, making the connection between the push block 161 and the connecting rod 17 more stable.

[0042] Please refer to Figure 6 Alternatively, a positioning protrusion 23 may be provided on the connecting surface of the connecting rod 17, and a positioning groove may be provided on the end face of the push block 161 away from the pump chamber 131. When the snap block 171 is connected to the snap groove 1611, the positioning protrusion 23 and the positioning groove are positioned and inserted, thereby improving the connection stability between the push block 161 and the connecting rod 17.

[0043] Please refer to Figure 7 In this embodiment, the deformable membrane 162 may be bent and connected between the push block 161 and the inner wall of the through hole. The deformable membrane 162 includes a first connecting end 1621, a second connecting end 1622 and a plurality of bent segments 1623, which are connected between the first connecting end 1621 and the second connecting end 1622.

[0044] The bent section 1623 is connected to the push block 161 through the first connecting end 1621. The thickness of the first connecting end 1621 gradually decreases from the direction of the push block 161 pointing to the bent section 1623, so that the first connecting end 1621 and the push block 161 form a stable connection that is not easily damaged.

[0045] The bent section 1623 is connected to the diaphragm panel 163 via the second connecting end 1622, and the inner surface of the second connecting end 1622 is flush with the inner surface of the through hole. When the push block 161 moves upward, no bend will form between the second connecting end 1622 and the diaphragm panel 163, making it less prone to damage.

[0046] Among them, the lengths of the multiple bending segments 1623 are equal, and the included angles between adjacent bending segments 1623 are equal. The deformation of the deformation membrane 162 is more uniform and less prone to damage.

[0047] In this embodiment, the push block 161, the deformation membrane 162, and the diaphragm panel 163 are integrally formed. The first connecting end 1621 is connected to the circumferential edge of the push block 161, and the second connecting end 1622 is connected to the outer surface edge of the through hole.

[0048] Please refer to Figure 2 In this embodiment, the diaphragm panel 163 near the pump chamber 131 is provided with an annular protrusion 164 surrounding the deformable membrane 162, and the valve bracket 12 is provided with an annular groove for positioning and engaging with the annular protrusion 164. The diaphragm panels 163 of multiple diaphragm structures are connected as one unit, and the multiple annular protrusions 164 are intersected and connected. Such a structure is more compact and stronger.

[0049] The working principle of this utility model is as follows: the motor 1B drives the crank 19 to rotate, and the crank 19 then drives the connecting rod 17 to move through the connecting shaft 18. Since the crank 19 has an eccentric inclined hole, the connecting shaft 18 will have an inclined angle. Thus, the crank 19 will drive the connecting shaft 18, the connecting rod 17 and the diaphragm structure to reciprocate. That is, the rotational motion of the motor 1B is converted into the up-and-down reciprocating motion of the push block 161, thereby driving the diaphragm structure to compress or expand the space of the pump chamber.

[0050] When the pusher block 161 moves upward, it can compress the space of the pump chamber 131, making the volume of the pump chamber 131 smaller and generating a large pressure. The pressure will push the gas inside the pump chamber 131 to the output chamber and discharge it.

[0051] When the pusher block 161 moves downward, it expands the space of the pump chamber 131. As the volume of the pump chamber 131 increases, the pressure in the pump chamber 131 decreases, creating a pressure difference between the outside environment and the pump chamber 131. The external atmospheric pressure is greater than the pressure in the pump chamber 131. The gas entering through the inlet pushes open the inlet umbrella valve 15 and then enters the pump chamber 131.

[0052] This creates an intake and exhaust action. As the motor 1B rotates continuously, the diaphragm structure continuously compresses or expands the space of the pump chamber 131, creating a continuous flow of gas.

[0053] This completes the process of the diaphragm pump drawing in and discharging fluid in this embodiment.

[0054] In this preferred embodiment, the highly reliable diaphragm structure's diaphragm body and connecting rod not only form a snap-fit ​​connection, but also limit the push block through the connecting surface of the connecting rod, ensuring a reliable and stable connection. Furthermore, the push block of the diaphragm body protrudes from the diaphragm panel near the pump chamber, allowing the push block to stretch the bent deformation membrane during pump chamber compression. This reduces bending of the deformation membrane. Simultaneously, the protruding side of the deformation membrane is higher than the end faces of the diaphragm panel and the push block, providing a large deformation space for the membrane and improving the service life of the diaphragm structure.

[0055] In summary, although the present invention has been disclosed above with reference to preferred embodiments, the above preferred embodiments are not intended to limit the present invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the claims.

Claims

1. A highly reliable diaphragm structure, characterized in that, include: The diaphragm body and the connecting rod, wherein the diaphragm body includes a pusher, a deformable membrane, and a diaphragm panel; The diaphragm panel has a pump chamber on one side and a connecting rod on the other side. The push block has a snap-fit ​​groove on its end face away from the pump chamber. The snap-fit ​​groove has an annular groove on its inner circumferential side wall. The connecting surface on one side of the connecting rod has a snap-fit ​​block. The snap-fit ​​block has a protruding ring on its outer circumferential side for engaging with the annular groove. When the snap-fit ​​block is connected to the snap-fit ​​groove, the end face of the push block is in contact with the connecting surface. The diaphragm panel has a through hole, one end of the pusher is located in the through hole, and the deformable membrane is connected around the periphery of one end of the pusher. The deformable membrane is connected between the pusher and the inner wall of the through hole. In its natural state, the pusher protrudes from the side of the diaphragm panel near the pump cavity. The side of the deformable membrane near the pump cavity is the protruding side. The distance between the protruding side of the deformable membrane and the diaphragm panel is greater than the distance between the end face of the pusher and the diaphragm panel.

2. The highly reliable diaphragm structure according to claim 1, characterized in that, The diaphragm is made of rubber, and a tightening protrusion is provided on the outer periphery of the end of the push block away from the pump cavity. The tightening protrusion and the push block are integrally formed.

3. The highly reliable diaphragm structure according to claim 1, characterized in that, A compression sleeve is slidably fitted around the outer periphery of the end of the push block away from the pump chamber, and the compression sleeve is interference-fitted with the push block.

4. The highly reliable diaphragm structure according to claim 1, characterized in that, An annular retaining edge is provided on the connecting surface. When the latching block is connected to the latching groove, the push block is limited to the inside of the annular retaining edge.

5. The highly reliable diaphragm structure according to claim 1, characterized in that, A positioning protrusion is provided on the connecting surface, and a positioning groove is provided on the end face of the push block away from the pump cavity. When the snap block is connected to the snap groove, the positioning protrusion and the positioning groove are positioned and inserted.

6. The highly reliable diaphragm structure according to claim 1, characterized in that, The deformable membrane is bent and connected between the push block and the inner wall of the through hole. The deformable membrane includes a first connecting end, a second connecting end, and a plurality of bent segments, which are connected between the first connecting end and the second connecting end. The bent section is connected to the push block through the first connecting end, and the thickness of the first connecting end gradually decreases as the push block points towards the bent section. The bent section is connected to the diaphragm panel via the second connecting end, and the inner surface of the second connecting end is flush with the inner surface of the through hole.

7. The highly reliable diaphragm structure according to claim 6, characterized in that, The lengths of the multiple bent segments are equal.

8. The highly reliable diaphragm structure according to claim 6, characterized in that, The included angles between adjacent bending segments are equal.

9. The highly reliable diaphragm structure according to claim 6, characterized in that, The pusher block, the deformation membrane, and the diaphragm panel are integrally formed. The first connecting end is connected to the circumferential edge of the pusher block, and the second connecting end is connected to the outer surface edge of the through hole.

10. A diaphragm pump, characterized in that, Using the highly reliable diaphragm structure described in any of claims 1-9, the diaphragm pump further includes an input umbrella valve, an output umbrella valve, a valve cover, a valve support, a diaphragm support, a base, a connecting shaft, a crank, and a motor. The valve cover and the valve support are connected, and an input cavity and an output cavity are connected between the valve cover and the valve support. The valve cover is provided with an input hole communicating with the input cavity and an output hole communicating with the output cavity. The diaphragm support is connected to the side of the valve support away from the valve cover. The pump cavity is formed between the diaphragm support and the valve support. The pump cavity is connected to the input cavity and the output cavity. The input umbrella valve is unidirectionally sealed in the input cavity and the pump cavity. The output umbrella valve is unidirectionally sealed in the output cavity and the pump cavity. The base is connected between the motor and the diaphragm support, the crank is connected to the output end of the motor, the connecting rod is connected to the crank through the connecting shaft, the diaphragm panel is pressed between the diaphragm support and the valve support, and the crank rotates to drive the diaphragm structure to compress or expand the space of the pump chamber; The diaphragm panel has an annular protrusion around the deformable membrane on the side near the pump chamber, and the valve bracket has an annular groove on one side for positioning and engaging with the annular protrusion. The diaphragm panels of multiple diaphragm structures are connected as one unit, and multiple annular protrusions are intersected and connected.

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