Differential pressure type diaphragm pump

Abstract

The utility model belongs to the technical field of diaphragm pumps, and relates to a differential pressure type diaphragm pump which comprises a pump body main part, an elastic sealing assembly and a covering part. The pump body main part comprises a pipeline structure and an opening formed in the top surface of the pipeline structure, a pump body boss is arranged in the opening, and the pump body boss divides the pipeline structure into a first pipe section and a second pipe section; the opening is covered with the elastic sealing assembly, the covering piece is fixed to the elastic sealing assembly in a covering mode, and the top of the inner wall of the covering piece, the elastic sealing assembly and the pump body boss are sequentially connected in an abutting mode so that the first pipe section and the second pipe section can be sealed and separated. The diaphragm pump has the beneficial effects that as the elastic ball body or the lengthened jacking platform is adopted to provide elastic force, when one end of the diaphragm pump is filled with fluid, the sealing element is propped against or separated from the top surface of the boss of the pump body according to the pressure of the fluid, so that the on-off of a pipeline structure is automatically controlled, and the problem that the diaphragm pump adopting a spring cannot be used after being used for a long time is solved. The sealing effect of the diaphragm pump is poor due to the fact that the spring may fail due to various reasons.

Description

Technical Field

[0001] The utility model relates to the technical field of diaphragm pumps, in particular to a pressure differential diaphragm pump. Background Art

[0002] The diaphragm pump is arranged on the pipeline to open and close the pipeline and seal it. The diaphragm pump generally includes a pump body main part, a sealing unit and a cover body. Bolts pass through the pump body main part, the sealing unit and the cover body in sequence to fix them together. The two ends of the pump body are respectively connected to the pipeline. The pump body has an opening, and a separator is arranged in the opening. The sealing unit includes an elastic seal and a spring. The seal is sealed with the opening and sealed against the separator under the top contact of the spring, so that the pipelines on both sides of the separator are not connected. When one end of the pipeline is filled with a fluid with sufficient pressure, the seal is squeezed to form a gap with the separator, so that the two ends of the pipeline are connected to transport the fluid.

[0003] The diaphragm pump uses a spring to provide support force. After long-term use, the performance of the spring may age and fail due to various reasons, resulting in poor sealing effect of the diaphragm pump and poor use effect. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the utility model provides a pressure differential diaphragm pump, which solves the technical problem that the existing diaphragm pump has poor use effect.

[0006] (II) Technical solution

[0007] In order to achieve the above-mentioned purpose, the main technical solutions adopted by the utility model include:

[0008] The utility model provides a differential pressure diaphragm pump, comprising a pump body main part, an elastic sealing component and a cover assembly; the pump body main part comprises a pipeline structure and an opening arranged on the top surface of the pipeline structure, a pump body boss is arranged in the opening, and the pump body boss extends upward from the bottom of the inner wall of the pipeline structure and to both sides to separate the pipeline structure into a first pipe section and a second pipe section;

[0009] The elastic sealing component covers the opening, and the cover is fixed on the elastic sealing component. The inner wall top of the cover, the elastic sealing component and the pump body boss are abutted in sequence to seal and separate the first pipe section from the second pipe section.

[0010] Optionally, the elastic sealing assembly includes a sealing member; the sealing member includes an integrally formed annular sealing portion and a spherical top contact portion, the top surface of the annular sealing portion is sealed with the edge of the cover member, and the bottom surface thereof is sealed with the edges around the opening;

[0011] The bottom surface of the spherical top contact part abuts against the pump body boss, and a top contact platform is arranged in the middle of the top surface thereof. The top contact platform extends upward and abuts against the cover part.

[0012] Optionally, the elastic sealing assembly further comprises an elastic sphere, which is arranged between the top contact platform and the cover member;

[0013] The top contact platform, the elastic sphere and the cover member are abutted in sequence.

[0014] Optionally, the top contact platform is hollow inside, or the top contact platform is a solid piece.

[0015] Optionally, the elastic sphere is solid or hollow.

[0016] Optionally, a spring sheet is provided between the cover and the annular sealing portion, and the bolt passes through the cover, the spring sheet, the annular sealing portion and the pump body main part in sequence and is connected together with the nut.

[0017] Optionally, the pump body boss is arranged along the radial direction of the pump body main part, and its top surface is recessed downward to form an arc surface matching with the spherical top contact part, and the lowest point of the arc surface is lower than the plane where the opening is located.

[0018] Optionally, the top and bottom surfaces of the annular sealing portion are both provided with protrusions, and the top surface of the pump body main component and the edges around the bottom surface of the cover component are both provided with accommodating grooves matching the protrusions.

[0019] Optionally, the top of the inner wall of the cover is thickened to form a top contact block, and the top contact block abuts against the top contact platform or the elastic sphere.

[0020] Optionally, the side wall of the pump body boss is an inclined surface, and the cross-sectional area of ​​the pump body boss gradually increases from top to bottom.

[0021] (III) Beneficial effects

[0022] The beneficial effects of the utility model are:

[0023] 1. A differential pressure diaphragm pump of the utility model adopts an elastic sphere or an extended top contact platform is arranged on the sealing member, the elastic sphere or the extended top contact platform provides sufficient elastic force for the sealing member to abut against the pump body boss, and the two ends of the pipeline structure are sealed and isolated. When one end of the pipeline structure is filled with fluid and the pressure difference between the two ends of the pipeline structure is large enough, the gap between the sealing member and the pump body boss is opened by the pressure of the fluid, so that the fluid flows in the pipeline structure; when the pressure of the fluid in the pipeline structure becomes smaller or even disappears, the sealing member re-seals and abuts against the pump body boss, and the two ends of the pipeline structure are no longer connected; compared with the prior art, the elastic sphere or the extended top contact platform is arranged, which can provide sufficient elastic force for the sealing member to abut and seal the pump body boss more stably and permanently, and the sealing effect is better, which solves the technical problem that after a long-term use of a spring-type diaphragm pump, the performance of the spring may age and fail due to various reasons, resulting in poor sealing effect and poor use effect of the diaphragm pump.

[0024] 2. Bolts and springs are set to fix the cover, seal and pump body together. At the same time, due to the elasticity of the springs, the connection between the three can be fine-tuned by screwing the bolts to adjust the contact force of the seal on the pump body boss, so as to adapt to the circulation of fluids with different pressures, which is more practical and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is one of the three-dimensional schematic diagrams of a diaphragm pump of Example 1 of a differential pressure diaphragm pump of the utility model;

[0026] Figure 2 This is one of the three-dimensional schematic diagrams of a diaphragm pump of Example 1 of a differential pressure diaphragm pump of the utility model;

[0027] Figure 3 This is an exploded schematic diagram of a diaphragm pump of Example 1 of a differential pressure diaphragm pump of the utility model;

[0028] Figure 4 It is a cross-sectional schematic diagram of a diaphragm pump of Example 1 of a differential pressure diaphragm pump of the utility model along the axial direction of the pipeline structure;

[0029] Figure 5 This is an exploded schematic diagram of a diaphragm pump of Example 2 of a differential pressure diaphragm pump of the utility model;

[0030] Figure 6 This is a schematic cross-sectional view of a diaphragm pump of Example 2 of a differential pressure diaphragm pump of the utility model along the axial direction of the pipeline structure.

[0031] [Description of Reference Numerals]

[0032] 1. Pump body main part; 11. First pipe section; 12. Second pipe section; 13. Pump body boss; 131. Arc surface;

[0033] 2. sealing member; 20. annular sealing portion; 21. projection; 22. spherical top contact portion; 23. top contact platform;

[0034] 3. Elastic sphere;

[0035] 4. Covering piece; 41. Screw through hole; 42. Top contact block. DETAILED DESCRIPTION

[0036] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below in conjunction with the accompanying drawings through specific implementation methods. Figure 1 With reference to the orientation, the direction where the pump body main part 1 is located is "down", and the direction where the cover part 4 is located is "up".

[0037] A pressure differential diaphragm pump proposed in an embodiment of the utility model includes a pump body main part, an elastic sealing component and a cover part; the pump body main part includes a pipeline structure and an opening arranged on the top surface of the pipeline structure, a pump body boss is arranged in the opening, the pump body boss extends upward from the bottom of the inner wall of the pipeline structure and to both sides to separate the pipeline structure into a first pipe section and a second pipe section; the elastic sealing component covers the opening, and the cover part is covered and fixed on the elastic sealing component, and the top of the inner wall of the cover part, the elastic sealing component and the pump body boss abut in sequence to seal and separate the first pipe section and the second pipe section; compared with the prior art, due to the use of an elastic sphere or an extended top contact platform on the seal, the elastic sphere or the extended top contact platform provides sufficient elastic force for the seal to abut against the pump body boss, so as to seal the pipeline structure The two ends of the structure are sealed and isolated. When one end of the pipeline structure is filled with fluid and the pressure difference between the two ends of the pipeline structure is large enough, the gap between the seal and the pump body boss is opened by the pressure of the fluid, allowing the fluid to flow in the pipeline structure; when the pressure of the fluid in the pipeline structure becomes smaller or even disappears, the seal is re-sealed against the pump body boss, and the two ends of the pipeline structure are no longer connected; compared with the prior art, an elastic sphere or an extended top contact platform is provided, which can provide sufficient elastic force for the seal to abut and seal the pump body boss more stably and permanently, and the sealing effect is better, which solves the technical problem that after a long-term use of a spring-type diaphragm pump, the performance of the spring may age and fail due to various reasons, resulting in poor sealing effect and poor use effect of the diaphragm pump.

[0038] In order to better understand the above technical solution, exemplary embodiments of the present invention will be described in more detail with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a clearer and more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0039] Embodiment 1:

[0040] Reference Figure 1 and Figure 2 This embodiment 1 provides a differential pressure diaphragm pump, including a pump body main part 1, an elastic sealing component and a cover part 4.

[0041] See also Figure 3 and Figure 4 The pump body main part 1 includes a pipeline structure and an opening on the top surface of the pipeline structure, and a pump body boss 13 is arranged in the opening. The pump body boss 13 extends upward from the bottom of the inner wall of the pipeline structure and to both sides to separate the pipeline structure into a first pipe section 11 and a second pipe section 12. The elastic sealing component covers the opening, and the cover 4 is covered and fixed on the elastic sealing component. The inner wall top of the cover 4, the elastic sealing component and the pump body boss 13 are abutted in sequence to seal and separate the first pipe section 11 from the second pipe section 12.

[0042] Continue reading Figure 3 and Figure 4 , the elastic sealing assembly includes a seal 2. The seal 2 can be made of a highly elastic plastic material. The seal 2 includes an integrally formed annular sealing portion 20 and a spherical top contact portion 22, and the annular sealing portion 20 is arranged around the spherical top contact portion 22. The top surface of the annular sealing portion 20 is sealed with the edge of the cover 4, and its bottom surface is sealed with the edges around the opening; the bottom surface of the spherical top contact portion 22 abuts against the pump body boss 13, and a top contact platform 23 is provided in the middle of its top surface, which extends upward and abuts against the cover 4. The top contact platform 23 is used instead of the spring to provide elastic force for the seal 2, and the top contact platform 23 is integrally formed with the seal 2, with fewer parts, fewer production processes, and more convenient installation. Figure 4 As shown, in actual production and application, the interior of the top contact platform 23 is set to be hollow and filled with gas, or the top contact platform 23 is a solid piece according to actual needs.

[0043] See also Figure 3 As a feasible solution, the pump body boss 13 is arranged along the radial direction of the pump body main part 1, and its top surface is recessed downward to form an arc surface 131 that cooperates with the spherical top contact part 22. The lowest point of the arc surface 131 is lower than the plane where the opening is located, and the use experience of the diaphragm pump is better.

[0044] See also Figure 4 As a feasible solution, the top and bottom surfaces of the annular sealing portion 20 are both provided with protrusions 21, and the top surface of the pump body main component 1 and the bottom surface of the cover component 4 are both provided with accommodating grooves matching the protrusions 21 at the edges around them. The sealing component 2 can be more firmly and better matched with the top surface of the pump body main component 1 and the bottom surface of the cover component 4.

[0045] See also Figure 4 In some feasible solutions, the top of the inner wall of the cover member 4 is thickened to form a top contact block 42, and the top contact block 42 abuts against the top contact platform 23 or the elastic sphere 3.

[0046] See also Figure 4 In actual application, the side wall of the pump body boss 13 is usually set as an inclined surface, and the cross-sectional area of ​​the pump body boss 13 gradually increases from top to bottom, and its cross-sectional shape along the axial direction of the pipeline structure is approximately triangular as a whole.

[0047] In order to facilitate the adjustment of the elastic force on the seal 2, a spring sheet is provided between the cover 4 and the annular sealing portion 20. The bolts pass through the screw holes 41 of the cover 4, the spring sheet, the annular sealing portion 20 and the pump body main part 1 in sequence, and are connected together with the nuts. The bolts and spring sheets are not shown in the figure. Bolts and spring sheets are provided to fix the cover 4, the seal 2 and the pump body together. At the same time, since the spring sheet is elastic, the connection between the three can be fine-tuned by screwing the bolts, thereby changing the contact force of the spherical top contact portion 22 of the seal 2 against the arc surface 131 of the pump body boss 13, so as to adapt to the circulation of fluids with different pressures, which is more practical and convenient.

[0048] Embodiment 2:

[0049] See also Figure 5 and Figure 6 On the basis of Example 1, this Example 2 improves the elastic sealing component, and adds an elastic sphere 3 to the elastic sealing component. The elastic sphere 3 is arranged between the top contact platform 23 and the cover part 4. The top contact platform 23, the elastic sphere 3 and the cover part 4 are abutted in sequence.

[0050] See also Figure 6 In the actual production process, the elastic sphere 3 is solid, or the elastic sphere 3 is hollow and filled with gas, and its material is usually a plastic material with good elasticity.

[0051] Compared with the spring, the top contact platform 23 and the elastic sphere 3 have better contact with the spherical top contact portion 22 of the seal 2, have a larger contact surface, and have a better sealing effect.

[0052] The diaphragm pump is suitable for large-flow fluid delivery scenarios. The diaphragm pump can be installed on a water pipe, and the first pipe section 11 and the second pipe section 12 are connected to the water pipe respectively. When the water flow is connected to one direction of the water pipe and the water flow reaches a certain pressure, the spherical top contact part 22 of the seal 2 is deformed under the water flow pressure, so that the gap between the seal 2 and the pump body boss 13 is opened, and the water automatically flows to the other end of the water pipe; when the water flow gradually decreases, its pressure decreases until it disappears, and the spherical top contact part 22 of the seal 2 re-contacts the pump body boss 13 due to the elastic force of the top contact platform 23 or the elastic sphere 3 to seal and cooperate, which plays a role in fully automatically controlling the water flow interruption and sealing effect, saving and environmental protection. In actual application, the diaphragm pump can also be used on pipelines that circulate other fluids.

[0053] In the description of the present utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0054] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] In the present utility model, unless otherwise clearly specified and limited, when a first feature is “on” or “below” a second feature, it may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, when a first feature is “above”, “above” or “above” a second feature, it may be that the first feature is directly above or obliquely above the second feature, or it may simply mean that the first feature is higher in level than the second feature. When a first feature is “below”, “below” or “below” a second feature, it may be that the first feature is directly below or obliquely below the second feature, or it may simply mean that the first feature is lower in level than the second feature.

[0056] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0057] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A differential pressure diaphragm pump, characterized in that: The invention comprises a pump body main part (1), an elastic sealing component and a cover part (4); the pump body main part (1) comprises a pipeline structure and an opening arranged on the top surface of the pipeline structure, a pump body boss (13) is arranged in the opening, and the pump body boss (13) extends upward from the bottom of the inner wall of the pipeline structure and to both sides to separate the pipeline structure into a first pipe section (11) and a second pipe section (12); The elastic sealing component covers the opening, and the cover member (4) is covered and fixed on the elastic sealing component. The top of the inner wall of the cover member (4), the elastic sealing component and the pump body boss (13) are abutted in sequence to seal and separate the first pipe section (11) and the second pipe section (12).

2. A differential pressure diaphragm pump according to claim 1, characterized in that: The elastic sealing assembly comprises a sealing member (2); the sealing member (2) comprises an integrally formed annular sealing portion (20) and a spherical top contact portion (22); the top surface of the annular sealing portion (20) is in sealing cooperation with the edge of the cover member (4), and the bottom surface thereof is in sealing cooperation with the edges around the opening; The bottom surface of the spherical top contact portion (22) abuts against the pump body boss (13), and a top contact platform (23) is provided in the middle of the top surface thereof. The top contact platform (23) extends upward and abuts against the cover member (4).

3. A differential pressure diaphragm pump as claimed in claim 2, characterized in that: The elastic sealing component further comprises an elastic sphere (3), wherein the elastic sphere (3) is arranged between the top contact platform (23) and the cover member (4); The top contact platform (23), the elastic sphere (3) and the cover member (4) are in contact with each other in sequence.

4. A differential pressure diaphragm pump as claimed in claim 2, characterized in that: The top contact platform (23) is hollow inside, or the top contact platform (23) is a solid piece.

5. A differential pressure diaphragm pump as claimed in claim 3, characterized in that: The elastic sphere (3) is solid or hollow.

6. A differential pressure diaphragm pump as claimed in claim 3, characterized in that: A spring sheet is provided between the cover member (4) and the annular sealing portion (20), and a bolt passes through the cover member (4), the spring sheet, the annular sealing portion (20) and the pump body main part (1) in sequence and is connected together with a nut.

7. A differential pressure diaphragm pump as claimed in claim 3, characterized in that: The pump body boss (13) is arranged along the radial direction of the pump body main part (1), and its top surface is recessed downward to form an arc surface (131) that matches the spherical top contact part (22), and the lowest point of the arc surface (131) is lower than the plane where the opening is located.

8. A differential pressure diaphragm pump according to claim 7, characterized in that: The top and bottom surfaces of the annular sealing portion (20) are both provided with protrusions (21), and the top surface of the pump body main part (1) and the bottom surface of the cover part (4) are both provided with accommodating grooves matching the protrusions (21) at the edges around them.

9. A differential pressure diaphragm pump as claimed in claim 8, characterized in that: The top of the inner wall of the cover member (4) is thickened to form a top contact block (42), and the top contact block (42) abuts against the top contact platform (23) or the elastic sphere (3).

10. A differential pressure diaphragm pump according to any one of claims 1 to 9, characterized in that: The side wall of the pump body boss (13) is an inclined surface, and the cross-sectional area of ​​the pump body boss (13) gradually increases from top to bottom.

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