Pump cavity structure and diaphragm pump

Abstract

The utility model discloses a pump cavity structure and a diaphragm pump. The pump cavity structure comprises a cavity shell, a pump shaft and a plurality of connecting rod assemblies, the cavity shell is provided with a plurality of circumferential side faces, and each circumferential side face is provided with at least one cavity hole. The pump shaft is arranged in the cavity shell in the axial direction of the cavity shell. The multiple sets of connecting rod assemblies are arranged in the cavity shell side by side in the axial direction of the pump shaft, one end of each connecting rod assembly is arranged on the peripheral side of the pump shaft in a sleeving mode, and the other end of each connecting rod assembly extends into the corresponding cavity hole; wherein the cavity shell is provided with a plurality of limiting parts, the end, extending into the cavity hole, of each connecting rod assembly is provided with a matching part, and each limiting part is matched with the corresponding matching part so as to limit the corresponding connecting rod assembly to move in the axial direction of the pump shaft. According to the diaphragm pump, the positions of all the connecting rod assemblies relative to the pump shaft are more stable, the relative positions of the multiple sets of connecting rod assemblies are more stable in the working process, mutual extrusion is not prone to occurring, and therefore the working stability of the whole diaphragm pump can be better guaranteed.

Description

Technical Field

[0001] This utility model relates to the technical field of pump bodies, specifically to a pump cavity structure and a diaphragm pump. Background Technology

[0002] A diaphragm pump is a transfer pump that uses the movement of a diaphragm to transport liquid or gas media. It relies on the reciprocating motion of a diaphragm to change the volume of the working chamber, thereby drawing in and expelling liquid or gas. To improve efficiency, diaphragm pumps typically have multiple chambers, each with a diaphragm. The simultaneous reciprocating motion of multiple diaphragms changes the volume of the working chamber, drawing in and expelling liquid or gas. Each diaphragm has an outlet and an inlet; the outlet connects to an outlet pipe, and the inlet connects to an inlet pipe. This allows for the simultaneous inhalation and exhalation of gas at the diaphragm. Because multi-diaphragm pumps (typically four, six, eight, or twelve holes) have multiple connecting rods, these rods are prone to movement during operation. When these rods shift, the entire pump body becomes unbalanced, prone to vibration, and may even affect the normal operation of the entire diaphragm pump. Utility Model Content

[0003] In order to solve the above-mentioned technical problems, the main purpose of this utility model is to provide a pump chamber structure and a diaphragm pump, which aims to solve the problem that the multiple connecting rods in the traditional diaphragm pump are easy to move. When the connecting rods are displaced, the operation of the entire pump body will be unbalanced, prone to vibration, and even affect the normal operation of the entire diaphragm pump.

[0004] To achieve the above objectives, the present invention proposes a pump chamber structure, characterized in that it comprises:

[0005] The cavity shell has multiple peripheral side surfaces, and each peripheral side surface has at least one cavity hole.

[0006] The pump shaft is disposed within the cavity housing along the axial direction of the cavity housing;

[0007] Multiple sets of connecting rod assemblies are arranged side by side in the cavity shell along the axial direction of the pump shaft. One end of each connecting rod assembly is sleeved on the outer periphery of the pump shaft, and the other end extends into the corresponding cavity hole.

[0008] The cavity shell is provided with multiple limiting parts, and each connecting rod assembly has a mating part at one end that extends into the cavity hole. Each limiting part cooperates with the corresponding mating part to restrict the axial movement of the corresponding connecting rod assembly along the pump shaft.

[0009] Optionally, each of the limiting portions includes a limiting groove disposed on the outer periphery of the cavity, and each of the mating portions includes a locking protrusion disposed on the end of each of the connecting rod assemblies. Each locking protrusion engages with the corresponding limiting groove to restrict the axial and circumferential movement of each of the connecting rod assemblies along the pump shaft.

[0010] Optionally, the shape of each of the card protrusions matches the shape of the limiting groove.

[0011] Optionally, each of the limiting grooves is arranged in a complete ring shape to surround the outer periphery of the corresponding cavity, and each of the locking protrusions is also arranged in a complete ring shape, or each of the locking protrusions includes a plurality of protrusions spaced apart along the circumference of the cavity.

[0012] Optionally, each of the limiting grooves includes multiple groove segments spaced apart along the circumference of the cavity, and each of the locking protrusions includes multiple protrusions spaced apart along the circumference of the cavity, with each protrusion corresponding to and locking within one of the multiple groove segments; or,

[0013] Each of the card protrusions is arranged in a complete ring shape.

[0014] Optionally, each of the link assemblies includes:

[0015] A connecting rod, one end of which is rotatably sleeved on the outside of the pump shaft;

[0016] One end of the diaphragm is connected to the other end of the connecting rod, and the other end extends into the corresponding cavity. The other end of the diaphragm is protruding and locked in the limiting groove, so that the diaphragm is configured to close the cavity.

[0017] Optionally, the diaphragm has a connecting end and a closing end that are arranged opposite each other in the radial direction of the pump shaft, the connecting end being screwed to the connecting rod, and the shape of the closing end matching the shape of the cavity.

[0018] Optionally, the cavity is circular, the closed end is a disc shape that matches the cavity, and the locking protrusion is annularly located at the edge of the closed end and protrudes from the side of the closed end facing the pump shaft.

[0019] Optionally, the pump chamber structure further includes a plurality of pump covers connected to the chamber shell, with each pump cover corresponding to one of the plurality of chamber holes. At least a portion of each pump cover can extend into the chamber hole to press against the diaphragm sheet and press the locking protrusion into the corresponding limiting groove.

[0020] This utility model also provides a diaphragm pump, including the pump chamber structure described above.

[0021] The technical solution provided by this utility model has the following beneficial effects:

[0022] The pump chamber structure provided by this utility model includes a chamber shell, a pump shaft, and multiple sets of connecting rod assemblies. The chamber shell has multiple peripheral surfaces, which can be four-sided or six-sided, etc. Each peripheral surface can have at least one cavity. The multiple sets of connecting rod assemblies are arranged to correspond to the multiple cavities, forming multiple working chambers and improving the working efficiency of the diaphragm pump. Furthermore, the chamber shell has multiple limiting parts, and each connecting rod assembly has a mating part at the end extending into the cavity. Each limiting part cooperates with its corresponding mating part to restrict the axial movement of the corresponding connecting rod assembly along the pump shaft. This ensures that each set of connecting rod assemblies can be limited and engaged by the limiting parts and the mating parts, making the position of each connecting rod assembly relative to the pump shaft and cavity more stable and preventing displacement. This makes each working chamber more stable during operation, reducing the likelihood of liquid or air leakage. Moreover, the more stable position of each connecting rod assembly relative to the pump shaft and the more stable relative positions between the multiple sets of connecting rod assemblies during operation prevent mutual compression, thus further ensuring the stability of the entire diaphragm pump operation. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0024] Figure 1 A schematic diagram of an embodiment of a pump chamber structure provided by this utility model;

[0025] Figure 2 for Figure 1 An exploded structural diagram of the pump chamber structure described herein;

[0026] Figure 3 for Figure 1 A cross-sectional structural diagram of the pump chamber structure described herein;

[0027] Figure 4 for Figure 3 A magnified structural diagram of detail A in the middle;

[0028] Figure 5 This is a schematic diagram of an embodiment of a diaphragm pump provided by the present invention.

[0029] Explanation of icon numbers:

[0030] 1000-Diaphragm pump; 100-Pump chamber structure; 1-Cavity shell; 11-Cavity hole; 12-Limiting groove; 2-Pump shaft; 3-Connecting rod assembly; 31-Connecting rod; 32-Diaphragm; 321-Clamping protrusion; 4-Pump cover; 200-Drive motor; 300-Fan.

[0031] The realization of the purpose, functional characteristics and excellent effects of this utility model will be further explained below in conjunction with specific embodiments and accompanying drawings. Detailed Implementation

[0032] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] It should be noted that if the embodiments of this utility model involve directional indication, the directional indication is only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0034] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0035] This utility model provides a pump chamber structure 100, which is suitable for a diaphragm pump 1000. For details, please refer to... Figures 1 to 2In this embodiment, the pump chamber structure 100 includes a chamber shell 1, a pump shaft 2, and multiple sets of connecting rod assemblies 3. The chamber shell 1 has multiple peripheral surfaces, each peripheral surface having at least one cavity 11. The pump shaft 2 is disposed within the chamber shell 1 along the axial direction of the chamber shell 1. The multiple sets of connecting rod assemblies 3 are arranged side-by-side along the axial direction of the pump shaft 2 within the chamber shell 1. One end of each connecting rod assembly 3 is sleeved on the outer peripheral side of the pump shaft 2, and the other end extends into the corresponding cavity 11. The chamber shell 1 has multiple limiting portions, and the end of each connecting rod assembly 3 extending into the cavity 11 has a mating portion. Each limiting portion cooperates with the corresponding mating portion to restrict the corresponding connecting rod assembly 3 from moving along the axial direction of the pump shaft 2.

[0036] In this embodiment, the cavity shell 1 is provided with multiple circumferential surfaces. Multiple circumferential surfaces can refer to an even number of circumferential surfaces, which can be greater than or equal to four. For example, the cavity shell 1 can be configured as having four or six surfaces. At least one cavity 11 can be provided on each side of the diaphragm pump 1000. Multiple sets of connecting rod assemblies 3 are arranged to correspond to the multiple cavities 11 to form multiple working chambers, thereby improving the working efficiency of the diaphragm pump 1000. Moreover, multiple limiting parts are provided on the housing 1, and a mating part is provided at the end of each connecting rod assembly 3 that extends into the cavity 11. Each limiting part cooperates with the corresponding mating part to restrict the axial movement of the corresponding connecting rod assembly 3 along the pump shaft 2. This allows each set of connecting rod assemblies 3 to be limited and engaged by the limiting part and the mating part, making the position of each connecting rod assembly 3 relative to the pump shaft 2 and the cavity 11 more stable and preventing displacement. The working chambers are more stable during operation and less prone to leakage. Furthermore, the position of each connecting rod assembly 3 relative to the pump shaft 2 is more stable, and the relative positions between multiple sets of connecting rod assemblies 3 are more stable during operation, making them less prone to mutual compression. Therefore, the stability of the entire diaphragm pump 1000 during operation is better guaranteed.

[0037] The following is an explanation of the specific structure of the pump cavity structure 100, taking the cavity shell 1 with four peripheral sides as an example. Other multi-faceted cavity shells 1 can be implemented with reference to this description.

[0038] Preferably, combined with Figure 3 and Figure 4 As shown, each of the limiting parts includes a limiting groove 12 disposed on the outer periphery of the cavity 11, and each of the mating parts includes a locking protrusion 321 disposed on the end of each of the connecting rod assemblies 3. Each locking protrusion 321 engages with the corresponding limiting groove 12 to restrict the axial and circumferential movement of each of the connecting rod assemblies 3 along the pump shaft 2. By locking the locking protrusion 321 in the corresponding limiting groove 12, each of the connecting rod assemblies 3 will not be displaced on the circumferential surface of the corresponding cavity shell 1, thus preventing the connecting rod assemblies 3 from moving relative to the pump shaft 2.

[0039] It is understandable that the shape and size of the corresponding limiting groove 12 will also be different when corresponding to cavities 11 of different shapes and sizes, and thus the size and shape of the locking protrusion 321 will also be different. Preferably, the shape of each locking protrusion 321 matches the shape of the limiting groove 12, so that each locking protrusion 321 can be better engaged in the corresponding limiting groove 12, the engagement fit is better, and therefore the limiting effect is also better.

[0040] In one embodiment, each of the limiting grooves 12 can be arranged in a complete ring shape, surrounding the outer periphery of the corresponding cavity 11. Each of the locking protrusions 321 is also arranged in a complete ring shape. By locking the complete ring of locking protrusions 321 within the ring-shaped limiting grooves 12, limiting is achieved in all directions along the plane containing the peripheral side surface of the cavity shell 1, resulting in a better limiting effect. Of course, the shapes of each locking protrusion 321 and the corresponding limiting grooves 12 may not be completely identical. For example, each locking protrusion 321 may include multiple protrusions spaced apart along the circumference of the cavity 11. These multiple protrusions are evenly distributed along the circumference of the limiting groove 12, similarly limiting the relative position of the connecting rod assembly 3 and the cavity shell 1 in multiple directions.

[0041] In another embodiment, each of the limiting grooves 12 includes a plurality of groove segments spaced apart along the circumference of the cavity 11. In this case, each of the locking protrusions 321 includes a plurality of protrusions spaced apart along the circumference of the cavity 11, and the plurality of protrusions are locked in the plurality of groove segments one by one; or, each of the locking protrusions 321 is arranged in a complete circle. By using the plurality of groove segments to lock the locking protrusions 321 arranged in a complete circle, or by using the plurality of groove segments and the plurality of protrusions to lock in a one-to-one correspondence, the relative position of the connecting rod assembly 3 and the cavity shell 1 can be limited, thereby ensuring the position of the connecting rod assembly 3 and the pump shaft 2.

[0042] Specifically, for each of the aforementioned link assemblies 3, in conjunction with Figure 2 and Figure 3 As shown, each of the connecting rod assemblies 3 includes a connecting rod 31 and a diaphragm 32. One end of the connecting rod 31 is rotatably sleeved on the outside of the pump shaft 2. One end of the diaphragm 32 is connected to the other end of the connecting rod 31, and the other end extends into the corresponding cavity 11. A retaining protrusion 321 is provided on the other end of the diaphragm 32 to engage with the limiting groove 12, so that the diaphragm 32 is configured to close the cavity 11. The diaphragm 32 is connected to the cavity shell 1, and the connecting rod 31 is connected to the pump shaft 2, thereby completely restricting the position of the connecting rod 31 and the diaphragm 32.

[0043] Furthermore, the diaphragm 32 has a connecting end and a closing end arranged opposite each other radially along the pump shaft 2. The connecting end is screwed to the connecting rod 31 to facilitate the assembly and disassembly of the diaphragm 32 and the connecting rod 31. The shape of the closing end matches the shape of the cavity 11, thereby better sealing the corresponding cavity 11. Moreover, the diaphragm 32 also includes a transition section connecting the connecting end and the closing end. The diameter of the filter section gradually increases in the radial and outward direction along the pump shaft 2. Preferably, the connecting end, the closing end, and the filter section are integrally formed, resulting in better strength and easier manufacturing.

[0044] Preferably, when the cavity 11 is circular, the closed end is a disc-shaped structure adapted to the cavity 11, and the locking protrusion 321 is annularly disposed at the edge of the closed end and protrudes from the side of the closed end facing the pump shaft 2. The diaphragm 32 is locked onto the cavity shell 1 by the peripheral edge of its closed end, thereby restricting the diaphragm 32 to the corresponding peripheral surface of the cavity shell 1. When the diaphragm 32 cannot move relative to the peripheral surface of the cavity shell 1, the entire connecting rod assembly 3 will not move relative to the cavity shell 1 and the pump shaft 2, thus better ensuring the relative positions of the multiple connecting rod assemblies 3.

[0045] Moreover, combined Figures 1 to 3 As shown, the pump chamber structure 100 further includes a plurality of pump covers 4 connected to the chamber shell 1. Each pump cover 4 is correspondingly positioned over a plurality of chamber holes 11. At least a portion of each pump cover 4 can extend into the chamber hole 11 to press against the diaphragm 32, thereby pressing the latching protrusion 321 into the corresponding limiting groove 12. By pressing the pump cover 4 against the corresponding diaphragm 32, the diaphragm 32 will not detach from the chamber hole 11. A working chamber is formed between the pump cover 4 and the corresponding diaphragm 32.

[0046] Each of the connecting rods 31 is eccentrically connected to the pump shaft 2. When the pump shaft 2 rotates under the drive of the drive motor 200, each of the connecting rods 31 can form a radial travel along the pump shaft 2 under the rotation of the pump shaft 2. The diaphragm 32 is elastically arranged. The movement of each of the connecting rods 31 drives each of the diaphragms 32 to undergo elastic deformation and movement, thereby generating pulsating force to promote the flow of gas or liquid.

[0047] This utility model also provides a diaphragm pump 1000, such as Figure 5As shown, the diaphragm pump 1000 includes the aforementioned pump chamber structure 100, drive motor 200, and fan 300. The drive motor 200 can drive the pump shaft 2 of the pump chamber structure 100 to rotate, and the fan 300 can dissipate heat from the drive motor 200. The drive motor 200, the fan 300, and the pump shaft 2 are all coaxially arranged, resulting in a more compact structure and smaller size.

[0048] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structure made using the contents of the present utility model specification and drawings, or directly or indirectly applied to other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A pump chamber structure, characterized by, The pump cavity structure comprises: a cavity shell having a plurality of circumferential sides, each of which is provided with at least one cavity hole; a pump shaft arranged in the cavity shell along the axial direction of the cavity shell; a plurality of connecting rod assemblies arranged side by side in the cavity shell along the axial direction of the pump shaft, one end of each connecting rod assembly being sleeved on the outer circumferential side of the pump shaft, and the other end extending into the corresponding cavity hole; wherein the cavity shell is provided with a plurality of limiting portions, one end of each connecting rod assembly extending into the cavity hole is provided with a matching portion, and each limiting portion is matched with the corresponding matching portion to limit the movement of the corresponding connecting rod assembly along the axial direction of the pump shaft.

2. The pump chamber structure of claim 1, wherein, Each of the limiting portions comprises a limiting groove arranged on the outer circumferential side of the cavity hole, and each of the matching portions comprises a clamping protrusion arranged on the end portion of each connecting rod assembly, each clamping protrusion being matched with the corresponding limiting groove to limit the movement of each connecting rod assembly along the axial and circumferential directions of the pump shaft.

3. The pump chamber structure of claim 2, wherein, The shape of each clamping protrusion matches the shape of the limiting groove.

4. The pump chamber structure of claim 2, wherein, Each limiting groove is arranged in a complete annular shape to be arranged around the outer circumferential side of the corresponding cavity hole, and each clamping protrusion is also arranged in a complete annular shape, or each clamping protrusion comprises a plurality of protruding portions arranged at intervals along the circumferential direction of the cavity hole.

5. The pump chamber structure of claim 2, wherein, Each limiting groove comprises a plurality of groove segments arranged at intervals along the circumferential direction of the cavity hole, each clamping protrusion comprises a plurality of protruding portions arranged at intervals along the circumferential direction of the cavity hole, and each protruding portion is matched with one of the groove segments; or Each clamping protrusion is arranged in a complete annular shape.

6. The pump chamber structure of claim 2, wherein Each connecting rod assembly comprises: a connecting rod rotatably sleeved on the outer side of the pump shaft at one end; a diaphragm connected to the other end of the connecting rod at one end and extending into the corresponding cavity hole at the other end, the clamping protrusion being arranged on the other end of the diaphragm to be matched with the limiting groove, so that the diaphragm is arranged to close the cavity hole.

7. The pump chamber structure of claim 6, wherein The diaphragm has a connecting end and a closing end arranged in opposition along the radial direction of the pump shaft, the connecting end being screwed with the connecting rod, and the shape of the closing end matching the shape of the cavity hole.

8. The pump chamber structure of claim 7, wherein The cavity hole is arranged in a circular shape, the closing end is arranged in a disc shape matching the cavity hole, and the clamping protrusion is arranged in a ring shape at the edge of the closing end and protrudes from the side of the closing end facing the pump shaft.

9. The pump chamber structure of claim 6, wherein, The pump cavity structure further comprises a plurality of pump covers connected to the cavity shell, each of the pump covers being matched with one of the cavity holes, and at least part of each pump cover being capable of extending into the cavity hole to be pressed onto the diaphragm to press the clamping protrusion into the corresponding limiting groove.

10. A diaphragm pump characterized in that, The pump cavity structure comprises any one of claims 1 to 9. The pump cavity structure comprises any one of claims 1 to 9.

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