Split type diaphragm chamber structure of diaphragm pump

Abstract

The invention relates to the technical field of diaphragm pumps, in particular to a diaphragm pump split type diaphragm chamber structure which comprises a split type diaphragm cavity and further comprises an anti-corrosion assembly detachably connected with the split type diaphragm cavity through a connecting fastener and arranged opposite to the split type diaphragm cavity in the axial direction. The rubber diaphragm is clamped and fixed between the split type diaphragm cavity and the anti-corrosion assembly; and the cavity is defined by the split type diaphragm cavity, the anti-corrosion assembly and the rubber diaphragm. According to the split type diaphragm chamber structure provided by the invention, the medium inlet and outlet channel, the inlet and outlet valve and the connecting mounting disc of the pipeline are integrated on the diaphragm cavity outer ring body, so that when quick-wear parts such as a rubber diaphragm are replaced, the inlet and outlet valve and the pipeline do not need to be disassembled, and only the connecting fastener of the anti-corrosion assembly and the split type diaphragm cavity needs to be disassembled; the maintenance process is greatly simplified, and the downtime of equipment is shortened.

Description

Technical Field

[0001] This invention relates to the field of diaphragm pump technology, and in particular to a split-type diaphragm chamber structure for a diaphragm pump. Background Technology

[0002] Against the backdrop of current industrial development, the zinc smelting, nickel-cobalt smelting, and other metallurgical industries are experiencing vigorous growth both domestically and internationally, widely adopting more energy-efficient and high-performance hydrometallurgical processes. This has led to a surge in market demand for corrosion-resistant diaphragm pumps. As a key piece of equipment in hydrometallurgical processes, corrosion-resistant diaphragm pumps require their flow components to possess excellent corrosion resistance to ensure safe and stable operation in contact with corrosive slurry solutions (the pumped medium). Sometimes, they must also withstand high-temperature and high-pressure environments, overcoming the problem of accelerated acid corrosion caused by increased ion activity in the solution due to elevated temperatures. The chemical reactions involved in hydrometallurgy demand that corrosion-resistant diaphragm pumps guarantee long-term leak-free operation and stable performance.

[0003] The diaphragm chamber of a diaphragm pump is a core load-bearing component. Both the diaphragm cavity and its cover are typically large castings, resulting in significant size and weight. In traditional corrosion-resistant diaphragm pumps, the diaphragm chamber cover has an insertion part that works with the diaphragm cavity to secure the rubber diaphragm. The corrosive medium being transported must sequentially pass through the inlet of the diaphragm cavity, the through-hole of the insertion part, and the outlet of the diaphragm cavity. During this process, both the diaphragm cavity and the cover are in direct contact with the corrosive medium, therefore both must be made of corrosion-resistant materials such as stainless steel or titanium alloy. This not only leads to high manufacturing difficulty and production costs for the castings, but also necessitates the inspection or even replacement of the entire diaphragm cavity or cover when localized corrosion occurs, significantly increasing equipment maintenance costs and extending downtime, severely impacting the continuous operation rate and profitability of the user's equipment.

[0004] To address the issue of excessively high costs associated with traditional structural materials, an improved diaphragm pump diaphragm chamber structure has been disclosed in the prior art (application publication number: CN120798752A). This structure completely isolates the corrosive medium from the diaphragm chamber through a rubber diaphragm, allowing the diaphragm chamber to be manufactured using ordinary carbon steel castings. This effectively reduces the material cost of the diaphragm chamber, simplifies its structure, and reduces the occurrence of casting defects. However, this improved structure still has significant drawbacks: Firstly, integrating the media channel onto the corrosion-resistant diaphragm cover makes the structure of the cover more complex than that of a traditional diaphragm cover. The reinforcing ribs between the outer side of the media channel and the cover surface, the transition angles between the inlet / outlet mounting plates and the cover surface, and other structural features not only increase casting difficulty and component weight but also complicate the stress distribution on the components. Secondly, because the inlet / outlet mounting plates of the corrosion-resistant diaphragm cover are directly connected to the inlet / outlet valves and pipelines, when replacing the rubber diaphragm, which is a vulnerable component, requires removing the bolts around the diaphragm cover, the inlet / outlet mounting bolts, and the bolts at the inlet / outlet valves before the heavy diaphragm cover can be removed. This significantly increases maintenance difficulty and extends equipment downtime for both large reciprocating diaphragm pumps and small pneumatic diaphragm pumps, failing to balance the dual requirements of cost control and ease of maintenance.

[0005] In summary, existing diaphragm pump diaphragm chamber structures either suffer from high manufacturing and maintenance costs, or, even after reducing some material costs, result in increased structural complexity and maintenance difficulty. They cannot simultaneously meet the core demands of industrial production for low cost, high reliability, and ease of maintenance. Therefore, there is an urgent need for an optimized diaphragm chamber structure to solve the above-mentioned technical problems. Summary of the Invention

[0006] Therefore, it is necessary to provide a diaphragm pump split-type diaphragm chamber structure that is simple in structure and easy to maintain, in order to address the above-mentioned technical problems.

[0007] The present invention provides a split-type diaphragm chamber structure for a diaphragm pump, comprising a split-type diaphragm cavity, and further comprising: The corrosion-resistant component is detachably connected to the split diaphragm cavity via fasteners and is arranged axially opposite to the split diaphragm cavity. A rubber diaphragm is clamped and fixed between the split diaphragm cavity and the corrosion-resistant component; The chamber is formed by the separation diaphragm cavity, the corrosion-resistant component, and the rubber diaphragm.

[0008] In one embodiment, the split diaphragm cavity is assembled from a diaphragm cavity bottom, an O-ring, a spacer ring, a rectangular sealing ring, an outer ring of the diaphragm cavity, and dynamic load prestressed bolts and nuts. The O-ring is disposed on the mating surface between the diaphragm cavity bottom and the spacer ring. The diaphragm cavity bottom, the O-ring, and the spacer ring are assembled with the outer ring of the diaphragm cavity, and the rectangular sealing ring is provided at the junction of the three.

[0009] In one embodiment, the outer ring of the spacer ring has a preset groove, which is movably engaged with the top of the diaphragm cavity.

[0010] In one embodiment, the outer ring of the diaphragm cavity has a completely symmetrical structure in terms of top and bottom, left and right, and front and back. The upper and lower ends are axially symmetrically provided with mounting plates, and the mounting plates are provided with connecting holes. The left and right end faces of the outer ring of the diaphragm cavity are each provided with a ring of evenly distributed dynamic load threaded holes.

[0011] In one embodiment, the corrosion protection component includes a diaphragm inner liner and a diaphragm chamber end cap, the diaphragm inner liner and the diaphragm chamber end cap being fixedly connected by connecting bolts.

[0012] In one embodiment, the thickness of the middle portion of the diaphragm chamber end cap is greater than the thickness at the edge bolt holes.

[0013] In one embodiment, the chamber is formed on one side of the liner inside the diaphragm, a pressing part is provided on the outer circumference of the chamber, a pressing groove is provided at the position of the inner cavity of the diaphragm ring, and the edge of the rubber diaphragm is clamped and fixed by the pressing part and the pressing groove.

[0014] In one embodiment, the outer ring of the diaphragm cavity is pressed together with the inner liner of the diaphragm cavity, and the mating area is sealed by the rectangular sealing ring.

[0015] In one embodiment, the inner liner of the diaphragm chamber has a channel on the side away from the chamber, with an inlet and an outlet at the two ends of the channel, and the outer ring of the diaphragm chamber has an inlet / outlet that coincides with the channel.

[0016] In one embodiment, the spacer ring and the outer ring of the diaphragm cavity are in contact with the transmission medium and are made of corrosion-resistant materials such as stainless steel and titanium.

[0017] In one embodiment, one side of the connection hole is connected in through to the inlet / outlet valve.

[0018] In one embodiment, a hydraulic oil chamber is formed on the side of the rubber diaphragm away from the cavity, and the O-ring seal is used to prevent hydraulic oil leakage in the hydraulic oil chamber.

[0019] The aforementioned split-type diaphragm chamber structure of a diaphragm pump integrates the connection between the medium channel and the inlet / outlet valves and pipelines into the outer ring of the diaphragm chamber. When replacing vulnerable parts such as the rubber diaphragm, it is not necessary to disassemble the inlet / outlet valves and pipelines; only the fasteners connecting the split-type corrosion-resistant diaphragm chamber cover and the split-type diaphragm chamber need to be disassembled, which greatly simplifies the maintenance process and shortens equipment downtime. The pre-grooved design on the diaphragm ring and the modular structure of the split-type diaphragm chamber make component replacement more convenient and further improve maintenance efficiency. The symmetrical structure design of the outer ring of the diaphragm chamber eliminates eddies and cavitation problems during medium flow, improving delivery stability. After the edge of the rubber diaphragm is clamped and fixed by the cooperation of the clamping part and the clamping groove, the rubber diaphragm made of fluororubber material blocks the corrosive medium, so that the bottom of the diaphragm chamber is completely out of contact with the corrosive medium. Therefore, ordinary pressure-bearing alloy steel can be used for casting, thereby significantly reducing material costs. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in this invention 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 some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 for Figure 1 Enlarged diagram of part A in the middle; Figure 3 This is a schematic diagram of the installation disk in this invention; Figure 4 This is a schematic diagram of the split-type diaphragm cavity in this invention; Figure 5 This is a schematic diagram of the anti-corrosion component in this invention; Figure 6 This is a schematic diagram of the structure of the outer ring of the diaphragm cavity in this invention.

[0022] Figure label: 1. Split-type diaphragm chamber; 101. Diaphragm chamber bottom; 102. O-ring seal; 103. Spacer ring; 104. Rectangular sealing ring; 105. Diaphragm chamber outer ring; 106. Dynamic load prestressed bolts and nuts; 2. Corrosion-resistant components; 21. Diaphragm chamber inner liner; 22. Diaphragm chamber end cap; 23. Connecting bolts; 3. Rubber diaphragm; 4. Chamber; 5. Pre-set groove; 6. Mounting plate; 61. Connecting hole; 7. Dynamic load threaded hole; 8. Pressing part; 9. Pressing groove; 10. Channel; 11. Hydraulic oil chamber. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this specification are for illustrative purposes only and do not represent the only possible implementation.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0026] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0027] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0028] The following is combined with Figures 1-6 This invention describes a split-type diaphragm chamber structure for a diaphragm pump.

[0029] See Figures 1-4 As shown, Implementation Content 1: This invention decomposes the diaphragm cavity of a traditional diaphragm chamber into an assembly consisting of a diaphragm cavity bottom 101, an O-ring seal 102, a spacer ring 103, a rectangular seal ring 104, an outer ring body 105, and dynamic load prestressing bolts and nuts 106. Specifically, the O-ring seal is placed on the mating surface of the diaphragm cavity bottom 101 and the spacer ring 103; after the diaphragm cavity bottom 101, the O-ring seal 102, and the spacer ring 103 are assembled, they are installed together with the outer ring body 105 of the diaphragm cavity and fastened together by the dynamic load prestressing bolts and nuts 106. A rectangular seal ring 104 is provided at the junction of the diaphragm cavity bottom 101, the spacer ring 103, and the outer ring body 105 of the diaphragm cavity. After the assembly, a split diaphragm cavity 1 is formed; at the same time, the separate design of the diaphragm cavity bottom 101 and the outer ring body 105 of the diaphragm cavity results in a relatively simple structure, which can better ensure the casting and processing quality. The locations where stress concentration easily occurs inside the traditional diaphragm cavity, such as corners and intersections, no longer exist after the split design. The structure of the outer ring 105 of the diaphragm cavity is simplified, and the bottom 101 of the diaphragm cavity only needs to be analyzed using the same strength verification method as the end cap 22 of the diaphragm chamber.

[0030] See Figure 1 , Figure 2 and Figure 5 As shown, Implementation Content Two: This invention decomposes the traditional diaphragm chamber cover into the anti-corrosion component 2 of this invention, including the inner liner 21 and the diaphragm chamber end cap 22, which are connected by connecting bolts 23. Unlike the general split diaphragm chamber cover, the middle part C2 of the diaphragm chamber end cap 22 is thicker than the C1 at the edge bolt holes, thereby optimizing the structural performance and preventing fatigue cracking of the diaphragm chamber end cap 22. The inner liner 21 of the diaphragm chamber needs to be made of corrosion-resistant materials such as stainless steel or titanium or other anti-corrosion technologies because it is in contact with the corrosive medium being transported. At the same time, the size and thickness of the inner liner 21 of the diaphragm chamber are reasonably reduced in the design, while the diaphragm chamber end cap 22 can be made of ordinary carbon steel or alloy steel profiles, thereby significantly reducing material costs.

[0031] See Figure 1 , Figure 2 and Figures 4-5As shown, in implementation three: the diaphragm cavity bottom 101, diaphragm ring 103, and diaphragm cavity outer ring 105 of the present invention are connected and combined to form a split diaphragm cavity 1, and a pressing groove 9 is formed in the inner cavity near the diaphragm ring 103; the diaphragm cavity inner liner 21 and the diaphragm cavity end cap 22 are connected by connecting bolts 23 to form an anti-corrosion component 2, and a cavity 4 is provided on one side of the diaphragm cavity inner liner 21, and the outer circumference of the cavity 4 is set as a pressing part 8; after the present invention is assembled as a whole, the diaphragm cavity end cap 22 and the diaphragm cavity outer ring 105 are fastened together by dynamic load prestressed bolts and nuts 106, and the edge of the rubber diaphragm 3 is connected to the pressing groove 9 through the pressing part 8. The outer ring 105 of the diaphragm cavity is clamped and fixed together with the inner liner of the diaphragm cavity and is provided with a rectangular sealing ring 104; a channel 10 is provided on the other side of the inner liner of the diaphragm cavity, with the two ends of the channel 10 being the inlet and outlet respectively, and the outer ring 105 of the diaphragm cavity is provided with an inlet and outlet that overlaps with it, and integrates the mounting plate 6 and the connecting hole 61.

[0032] See Figure 4 and Figure 5 As shown, the spacer ring 103 and the outer ring body 105 of the diaphragm cavity are in contact with the corrosive medium being transported, and must be made of corrosion-resistant materials such as stainless steel or titanium. The rectangular sealing ring 104 must be made of corrosion-resistant materials such as fluororubber. According to the third implementation, after the edge of the rubber diaphragm 3 is clamped and fixed by the clamping part 8 and the clamping groove 9, the rubber diaphragm 3 made of fluororubber material blocks the corrosive medium, so that the bottom of the diaphragm cavity 101 is completely out of contact with the corrosive medium. Therefore, ordinary pressure-bearing alloy steel can be used for casting, thereby significantly reducing material costs.

[0033] See Figure 4 and Figure 5 As shown, the O-ring 102 is located on the mating surface of the diaphragm cavity bottom 101 and the spacer ring 103. According to the third embodiment, after the edge of the rubber diaphragm 3 is clamped and fixed by the clamping part 8 and the clamping groove 9, the rubber diaphragm 3 will block the corrosive medium. The function of the O-ring 102 is to prevent the hydraulic oil leakage of the hydraulic oil cavity 11 on the other side of the rubber diaphragm 3. Therefore, ordinary rubber material can be used to make the O-ring 102.

[0034] See Figure 1 and Figure 2As shown, the split diaphragm cavity 1 formed by the connection and assembly in Implementation Content 1 will be a fault-free whole. After the diaphragm pump is running normally, it will not need to be disassembled when replacing the rubber diaphragm 3, making maintenance more convenient and quick. Unless the outer ring 105 of the diaphragm cavity is replaced, it will be completely disassembled, in which case the rectangular sealing ring 104 will need to be replaced at the same time. Furthermore, the diaphragm cavity bottom 101, O-ring seal and spacer ring 103 will be assembled as a fault-free whole, and will not need to be disassembled after normal operation. Considering that the spacer ring 103 needs to be replaced later, the O-ring seal will need to be replaced at the same time. The outer ring of the spacer ring 103 is provided with a preset groove 5, which makes it easy to use tools to push it out from the diaphragm cavity bottom 101 during disassembly.

[0035] See Figure 6 As shown, in Implementation 1, the preferred design of the outer ring 105 of the diaphragm cavity is a completely symmetrical structure in terms of top and bottom, left and right, and front and back. Mounting plates 6 are provided at both the top and bottom ends, and the mounting plates 6 are provided with connecting holes 61 (for connecting inlet and outlet valves). Each of the left and right end faces of the ring has a ring of evenly distributed dynamic load threaded holes 7. The symmetrical structure simplifies and optimizes the manufacturing process. Secondly, the symmetrical design enhances interchangeability. Furthermore, compared to traditional diaphragm chambers, the symmetrical structure straightens the path of the transmission medium within the chamber 4 and increases its overlap with the channel 10, eliminating the drawbacks of eddies and cavitation generated within the chamber 4. Also, due to its symmetrical structure, the rectangular sealing rings 104, dynamic load prestressed bolts, and nuts 106 used on both sides can be of identical specifications. Finally, because it is connected to the inlet and outlet valves, it is not necessary to disassemble the inlet and outlet valves when replacing the rubber diaphragm 3.

[0036] Among them, the outer ring body 105 of the diaphragm cavity and the inner lining body 21 of the diaphragm cavity are made of stainless steel or titanium. Their surfaces that come into contact with the corrosive medium being transported can be treated with other anti-corrosion technologies, such as surface coating and rubber lining, depending on the working conditions. Since the structure of each part of the present invention is simple, surface anti-corrosion coating and rubber lining are easier, simplifying the processing difficulty and improving the convenience of maintenance.

[0037] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0038] The above-described embodiments are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A split-type diaphragm chamber structure for a diaphragm pump, comprising a split-type diaphragm cavity, characterized in that, Also includes: The corrosion-resistant component is detachably connected to the split diaphragm cavity via fasteners and is arranged axially opposite to the split diaphragm cavity. A rubber diaphragm is clamped and fixed between the split diaphragm cavity and the corrosion-resistant component; The chamber is formed by the separation diaphragm cavity, the corrosion-resistant component, and the rubber diaphragm.

2. The diaphragm pump split-type diaphragm chamber structure according to claim 1, characterized in that, The split-type diaphragm cavity is assembled from a diaphragm cavity bottom, an O-ring, a spacer ring, a rectangular sealing ring, an outer ring of the diaphragm cavity, and dynamic load prestressed bolts and nuts. The O-ring is located on the mating surface between the diaphragm cavity bottom and the spacer ring. The diaphragm cavity bottom, the O-ring, and the spacer ring are assembled with the outer ring of the diaphragm cavity, and the rectangular sealing ring is provided at the junction of the three components.

3. The diaphragm pump split-type diaphragm chamber structure according to claim 2, characterized in that, The outer ring of the diaphragm has a preset groove, which is movably engaged with the top of the diaphragm cavity.

4. The diaphragm pump split-type diaphragm chamber structure according to claim 2, characterized in that, The outer ring of the diaphragm cavity has a completely symmetrical structure in the upper and lower, left and right, and front and back. The upper and lower ends are axially symmetrically provided with mounting plates. The mounting plates are provided with connecting holes. The left and right end faces of the outer ring of the diaphragm cavity are each provided with a ring of evenly distributed dynamic load threaded holes.

5. The diaphragm pump split-type diaphragm chamber structure according to claim 2, characterized in that, The corrosion protection component includes an inner liner of the diaphragm chamber and an end cap of the diaphragm chamber, which are fixedly connected by connecting bolts.

6. The diaphragm pump split-type diaphragm chamber structure according to claim 5, characterized in that, The thickness of the middle portion of the diaphragm chamber end cap is greater than the thickness at the edge bolt holes.

7. The diaphragm pump split-type diaphragm chamber structure according to claim 5, characterized in that, The chamber is located on one side of the liner inside the diaphragm. A pressing part is provided on the outer circumference of the chamber. A pressing groove is provided at the position of the inner cavity of the diaphragm ring. The edge of the rubber diaphragm is clamped and fixed by the pressing part and the pressing groove.

8. The diaphragm pump split-type diaphragm chamber structure according to claim 7, characterized in that, The outer ring of the diaphragm cavity is pressed together with the inner liner of the diaphragm cavity, and the joint between the two is sealed by the rectangular sealing ring.

9. A diaphragm pump split-type diaphragm chamber structure according to claim 5, characterized in that, The inner lining of the diaphragm chamber has a channel on the side away from the chamber, with an inlet and an outlet at each end of the channel. The outer ring of the diaphragm chamber has an inlet / outlet that coincides with the channel.

10. A diaphragm pump split-type diaphragm chamber structure according to claim 2, characterized in that, The spacer ring and the outer ring of the diaphragm cavity are in contact with the transmission medium and are made of corrosion-resistant materials such as stainless steel and titanium.

11. A diaphragm pump split-type diaphragm chamber structure according to claim 4, characterized in that, One side of the connection hole is connected to the inlet / outlet valve.

12. The diaphragm pump split-type diaphragm chamber structure according to claim 1, characterized in that, The side of the rubber diaphragm away from the chamber forms a hydraulic oil chamber, and the O-ring seal is used to prevent hydraulic oil leakage from the hydraulic oil chamber.

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