Double-U-shaped diaphragm structure and diaphragm pump with same

Abstract

The utility model relates to a double-U-shaped diaphragm structure and a diaphragm pump with the same, the double-U-shaped diaphragm structure comprises an integrally formed U-shaped piece body, the U-shaped piece body comprises a U-shaped piece first horizontal part, at least one U-shaped piece first U-shaped part, at least one U-shaped piece second U-shaped part and a U-shaped piece second horizontal part, one end of the first U-shaped part of the uppermost U-shaped sheet is connected with the first horizontal part of the U-shaped sheet, the other end of the first U-shaped part of the uppermost U-shaped sheet is connected with the second U-shaped part of the U-shaped sheet, one end of the second U-shaped part of the lowermost U-shaped sheet is connected with the first U-shaped part of the U-shaped sheet, and the other end of the second U-shaped part of the lowermost U-shaped sheet is connected with the second horizontal part of the U-shaped sheet. According to the diaphragm pump, the phenomena of tension fracture and bulging of the diaphragm can be effectively reduced, so that the service life of the diaphragm and the service life of the diaphragm pump are prolonged, meanwhile, the single flow and the volume efficiency can be increased, and the larger liquid outlet amount and the larger liquid outlet pressure are provided.

Description

Technical Field

[0001] The utility model relates to the field of diaphragm pumps, in particular to a double U-shaped diaphragm structure and a diaphragm pump with the structure. Background Art

[0002] A diaphragm pump is a positive displacement pump that uses a diaphragm to separate the liquid being pumped from the pump cylinder and uses the fluctuation of the diaphragm to achieve the suction and discharge of the liquid. Diaphragm pumps are mainly divided into plunger diaphragm pumps, hydraulic diaphragm pumps and pneumatic diaphragm pumps. Regardless of the power form of the diaphragm pump, the diaphragm is one of the important components. The fluctuation stroke, life and other parameters of the diaphragm affect the corresponding characteristics of the diaphragm pump. For the plunger diaphragm pump, in the prior art, when the piston moves downward, the diaphragm is stretched to absorb liquid. Due to the stretching of the diaphragm, the middle deformation part of the diaphragm is in a state of deformation fatigue and becomes thinner, and is in repeated hard contact with the cylinder sleeve and the piston, which makes the diaphragm easy to be pulled and torn; when the piston moves upward, the diaphragm deformation is restored, but the liquid in the volume chamber is compressed to form high pressure, and the high-pressure liquid acts on the diaphragm, especially the deformation part of the diaphragm, which is in a state of deformation fatigue and becomes thinner due to repeated stretching of the deformation part, so that this part is easy to bulge, deform, and rupture under the action of the high-pressure liquid, which easily causes the diaphragm to be damaged, the diaphragm pump pressure to be reduced, and the oil tank to enter water and cannot be lubricated. As disclosed in Chinese invention patent application CN117489570A, a radial diaphragm pump includes a pump unit, the number of which is multiple and used to independently transport fluid; an annular tube body, the number of which is two and connected to the multiple pump units, one side of the annular tube body is connected to the inlet of the multiple pump units, and the other side of the annular tube body is connected to the outlet of the multiple pump units, and a fluid interface is provided on the annular tube body, and the annular tube body includes multiple single tube bodies connected end to end; the pump unit includes a cylinder body, a piston, a diaphragm, and a connecting rod. Specifically, the eccentric shaft is driven by an external motor or an internal combustion engine, and the eccentric shaft drives the piston to reciprocate along the cylinder body through the connecting rod, and the piston drives the diaphragm to expand and contract. In conjunction with the one-way valve at the inlet and outlet of the cylinder body, the fluid can be continuously transported from the inlet to the outlet, and in conjunction with the annular tube bodies on both sides, a channel for transporting fluid is formed. In the aforementioned patent application, the upward and downward movement of the piston causes the diaphragm to be in hard contact with the cylinder sleeve and the piston, and the high-pressure liquid in the volume chamber makes the diaphragm prone to tearing and bulging. Another example is an explosion-proof diaphragm pump disclosed in Chinese utility model patent CN218266270U, ​​which includes a mounting base and a connecting mechanism arranged above the mounting base, wherein the connecting mechanism includes a disassembly assembly and a compression assembly; the disassembly assembly includes a threaded disk, a sleeve, a threaded plate, a compression chamber and a piston chamber, a compression chamber is arranged above the mounting base, a threaded plate is fixedly connected to the side wall of the compression chamber, the piston chamber is fixedly connected to both sides of the compression chamber, a threaded disk is fixedly connected to one end of the piston chamber, and a sleeve is fixedly connected to the surface of the threaded disk; the compression assembly includes a cylinder, a crank ring, a buffer mechanism, a piston chamber, a piston rod, a diaphragm and a rubber plug, the top of the compression chamber is fixedly connected to the cylinder, the surface of the cylinder is provided with a crank ring, the interior of the compression chamber is provided with a buffer mechanism, the interior of the piston chamber is slidably connected to the piston rod, one end of the piston rod is fixedly connected to the diaphragm, and the outer side of the diaphragm is fixedly connected to the rubber plug.The diaphragm in the aforementioned patent is also prone to problems of tearing and bulging.

[0003] In view of this, the utility model provides a double U-shaped diaphragm structure and a diaphragm pump having the structure, which provides a deformation path and a deformation stroke for the diaphragm by arranging two U-shaped parts, thereby avoiding hard contact and thinning of the diaphragm with the cylinder sleeve during the deformation process, and at the same time uses the side edge of the support valve to limit the position, thereby solving the problem of the diaphragm being easily torn and bulged. Utility Model Content

[0004] The utility model intends to provide a double U-shaped diaphragm structure and a diaphragm pump with the structure to solve the deficiencies in the prior art. The technical problem to be solved by the utility model is achieved through the following technical solutions.

[0005] A double U-shaped diaphragm structure includes an integrally formed U-shaped sheet body, wherein the improvement lies in that the U-shaped sheet body includes a first horizontal portion of the U-shaped sheet, at least one first U-shaped portion of the U-shaped sheet, at least one second U-shaped portion of the U-shaped sheet, and a second horizontal portion of the U-shaped sheet; one end of the first U-shaped portion of the U-shaped sheet located at the top layer is connected to the first horizontal portion of the U-shaped sheet, and the other end is connected to the second U-shaped portion of the U-shaped sheet; one end of the second U-shaped portion of the U-shaped sheet located at the bottom layer is connected to the first U-shaped portion of the U-shaped sheet, and the other end is connected to the second horizontal portion of the U-shaped sheet; and the number of the first U-shaped portions of the U-shaped sheet is equal to the number of the second U-shaped portions of the U-shaped sheet.

[0006] Preferably, a U-shaped sheet edge protrusion is provided on the upper surface of the first horizontal portion of the U-shaped sheet near the outer edge.

[0007] Preferably, a U-shaped piece connecting hole for connecting to the piston is provided in the middle of the second horizontal part of the U-shaped piece, and a U-shaped piece upper protrusion and a U-shaped piece lower protrusion for sealing are respectively provided in the middle of the upper and lower surfaces of the second horizontal part of the U-shaped piece, and the U-shaped piece connecting hole passes through the upper and lower surfaces of the U-shaped piece upper protrusion and the U-shaped piece lower protrusion.

[0008] Preferably, it further includes a support valve, which is arranged at the lower part of the U-shaped piece body, and the support valve includes a support valve horizontal part abutting against the lower surface of the second horizontal part of the U-shaped piece and support valve side parts arranged on both sides of the support valve horizontal part, and a part of the second U-shaped part of the U-shaped piece is accommodated in the support valve side parts, and the height of the support valve side parts is not lower than the thickness of the second horizontal part of the U-shaped piece and not higher than the thickness of the second U-shaped part of the U-shaped piece.

[0009] Preferably, a support bearing connecting hole for connecting with the piston is provided in the middle of the horizontal part of the support bearing, and a support bearing upper accommodating part and a support bearing lower accommodating part are respectively provided in the middle of the upper and lower surfaces of the horizontal part of the support bearing, and the support bearing connecting hole passes through the lower and upper surfaces of the upper and lower accommodating parts of the support bearing.

[0010] Preferably, the support bearing horizontal portion is provided with a support bearing oil seepage hole penetrating through the upper and lower surfaces of the support bearing horizontal portion.

[0011] Preferably, it also includes a fixing plate, which is abutted against the upper surface of the second horizontal portion of the U-shaped piece, and is used to seal and fix the U-shaped piece body and the connection between the support bearing and the piston.

[0012] Preferably, the fixing plate comprises a fixing plate body and a fixing plate transition portion provided at an edge of a lower surface of the fixing plate body.

[0013] Preferably, a fixing plate connecting hole for connecting to the piston is provided in the middle of the fixing plate, and a fixing plate upper accommodating portion and a fixing plate lower accommodating portion are respectively provided in the middle of the upper and lower surfaces of the fixing plate, and the fixing plate connecting hole passes through the lower and upper surfaces of the fixing plate upper accommodating portion and the fixing plate lower accommodating portion.

[0014] The utility model also provides a diaphragm pump, comprising a diaphragm structure, the improvement of which lies in that: the diaphragm structure is a double U-shaped diaphragm structure as described above.

[0015] The utility model provides a deformation path and a deformation stretching amount through the first U-shaped part and the second U-shaped part of the U-shaped piece body, which not only reduces the occurrence of diaphragm cracking and tearing problems, prolongs the service life of the diaphragm pump and the U-shaped piece body, but also increases the fluctuation stroke of the U-shaped piece body, thereby increasing the single flow rate and volumetric efficiency; the support valve can reduce the occurrence of diaphragm cracking and tearing problems, prevent the diaphragm from side bulging and deformation, and increase the stretching area, thereby prolonging the service life of the U-shaped piece body and increasing the single flow rate and volumetric efficiency; the fixed plate can reduce the occurrence of tearing problems, and can also increase the single flow rate and volumetric efficiency.

[0016] In short, the utility model can effectively reduce the occurrence of diaphragm tearing and bulging, thereby extending the service life of the diaphragm and the diaphragm pump, while increasing the single flow rate and volumetric efficiency, thereby providing a larger liquid output and liquid output pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 It is a schematic diagram of the full cross-section structure of the utility model;

[0019] Figure 3 It is a schematic diagram of the structure when the utility model is used;

[0020] The reference numerals in the accompanying drawings are in order: 1. U-shaped piece body, 11. U-shaped piece first horizontal portion, 12. U-shaped piece first U-shaped portion, 13. U-shaped piece second U-shaped portion, 14. U-shaped piece second horizontal portion, 15. U-shaped piece upper raised portion, 16. U-shaped piece lower raised portion, 17. U-shaped piece connecting hole, 18. U-shaped piece edge raised portion, 2. Supporting shoe, 21. Supporting shoe side portion, 22. Supporting shoe horizontal portion, 23. Supporting shoe connecting hole, 24. Supporting shoe upper accommodating portion, 25. Supporting shoe lower accommodating portion, 26. Supporting shoe oil seepage hole, 3. Fixed plate, 31. Fixed plate body, 32. Fixed plate transition portion, 33. Fixed plate connecting hole, 34. Fixed plate upper accommodating portion, 35. Fixed plate lower accommodating portion, a1. Shell, a2. Cylinder liner, a3. Piston, a4. Pressure cover. DETAILED DESCRIPTION

[0021] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0022] Embodiment 1:

[0023] Reference Figures 1 to 3 As shown, a double U-shaped diaphragm structure includes an integrally formed U-shaped sheet body 1, characterized in that: the U-shaped sheet body 1 includes a U-shaped sheet first horizontal portion 11, at least one U-shaped sheet first U-shaped portion 12, at least one U-shaped sheet second U-shaped portion 13, and a U-shaped sheet second horizontal portion 14, one end of the U-shaped sheet first U-shaped portion 12 located at the top layer is connected to the U-shaped sheet first horizontal portion 11, and the other end is connected to the U-shaped sheet second U-shaped portion 13, one end of the U-shaped sheet second U-shaped portion 13 located at the bottom layer is connected to the U-shaped sheet first U-shaped portion 12, and the other end is connected to the U-shaped sheet second horizontal portion 14, and the number of the U-shaped sheet first U-shaped portions 12 and the number of the U-shaped sheet second U-shaped portions 13 are equal.

[0024] In this embodiment, the first horizontal portion 11 of the U-shaped sheet is used to connect with the cylinder sleeve a2 and the gland a4 and seal the connection, so that the entire chamber is divided into an upper volume chamber and a lower piston chamber through the U-shaped sheet body 1. The volume chamber is used to pump the liquid to be transported, that is, the piston a3 stretches the U-shaped sheet body 1 downward to achieve the liquid suction operation, and the piston a3 restores the U-shaped sheet body 1 upward to achieve the pressurized delivery of the liquid, and the oil-liquid separation is also achieved during the entire operation. The first U-shaped portion 12 of the U-shaped sheet located at the top layer defines the deformation path of the U-shaped sheet body 1, and the first U-shaped portion 12 of the U-shaped sheet located at the bottom layer simultaneously defines the deformation path of the U-shaped sheet body 1 and provides the deformation stretching amount of the U-shaped sheet body 1. The second U-shaped portion 13 of the U-shaped sheet provides the deformation stretching amount of the U-shaped sheet body 1, thereby avoiding the problem of tearing and tearing caused by repeated hard contact between the first horizontal portion 11 of the U-shaped sheet and the cylinder sleeve a2 when the U-shaped sheet body 1 reciprocates, thereby extending the service life of the U-shaped sheet body 1. At the same time, the deformation stretching amount provided by the second U-shaped part 13 of the U-shaped sheet or the second U-shaped part 13 of the U-shaped sheet and the first U-shaped part 12 of the U-shaped sheet located in the lower layer ensures that the U-shaped sheet body 1 will not become thinner due to stretching during the fluctuation process, and is thus not prone to damage such as tearing or ripping.

[0025] This embodiment, through the cooperation of the first U-shaped portion 12 of the U-shaped piece and the second U-shaped portion 13 of the U-shaped piece, limits the deformation path of the U-shaped piece body 1, provides the deformation stretching amount of the U-shaped piece body 1, and increases the fluctuation stroke of the U-shaped piece body 1. Compared with the flat diaphragm in the prior art, there will be no situation where the U-shaped piece body 1 is continuously stretched up and down, bent, and repeatedly in hard contact with the cylinder sleeve a2 due to insufficient stroke, thereby reducing the occurrence of the U-shaped piece body 1 being torn or split.

[0026] Furthermore, when the number of the U-shaped sheet first U-shaped portion (12) is plural, the U-shaped sheet second U-shaped portion (13) located between the uppermost U-shaped sheet first U-shaped portion (12) and the lowermost U-shaped sheet second U-shaped portion (13) are alternately arranged with the U-shaped sheet first U-shaped portion (12) and sequentially connected. In this embodiment, by arranging a plurality of U-shaped sheet first U-shaped portions 12 and U-shaped sheet second U-shaped portions 13, the fluctuation stroke of the U-shaped sheet body 1 can be increased, thereby increasing the single flow rate and volumetric efficiency.

[0027] Furthermore, a U-shaped sheet edge protrusion 18 is provided on the upper surface of the first horizontal portion 11 of the U-shaped sheet near the outer edge.

[0028] In this embodiment, an extrusion seal is achieved by setting a U-shaped sheet edge protrusion 18 and utilizing the extrusion of the pressure cover a4. Compared with the planar extrusion seal in the prior art, the U-shaped sheet edge protrusion 18 cooperates with the recessed hole on the pressure cover a4, thereby effectively extruding to achieve a better extrusion sealing effect. At the same time, due to the setting of the U-shaped sheet edge protrusion 18 and the cooperation of the recessed hole on the pressure cover a4, the extrusion connection between the pressure cover a4, the cylinder sleeve a2 and the first horizontal portion 11 of the U-shaped sheet is more stable, thereby preventing the first horizontal portion 11 of the U-shaped sheet from being pulled off when the piston a3 moves downward to stretch the U-shaped sheet body 1.

[0029] Furthermore, a U-shaped sheet connecting hole 17 for connecting to the piston a3 is provided in the middle of the second horizontal portion 14 of the U-shaped sheet, and a U-shaped sheet upper protrusion 15 and a U-shaped sheet lower protrusion 16 for sealing are respectively provided in the middle of the upper and lower surfaces of the second horizontal portion 14 of the U-shaped sheet, and the U-shaped sheet connecting hole 17 passes through the upper and lower surfaces of the U-shaped sheet upper protrusion 15 and the U-shaped sheet lower protrusion 16.

[0030] In this embodiment, a connecting piece, such as a bolt, passes through the U-shaped piece connecting hole 17 to connect the U-shaped piece body 1 and the piston a3; the U-shaped piece upper protrusion 15 and the U-shaped piece lower protrusion 16 can seal the corresponding connection points.

[0031] Embodiment 2:

[0032] Based on Example 1, Figure 2 As shown, the double U-shaped diaphragm structure also includes a support bearing 2, which is supported on the lower part of the U-shaped sheet body 1, and includes a support bearing horizontal portion 22 abutting against the lower surface of the second horizontal portion 14 of the U-shaped sheet and support bearing side portions 21 arranged on both sides of the support bearing horizontal portion 22, and a portion of the second U-shaped portion 13 of the U-shaped sheet is accommodated in the support bearing side portions 21, and the height of the support bearing side portions 21 is not lower than the thickness of the second horizontal portion 14 of the U-shaped sheet and not higher than the thickness of the second U-shaped portion 13 of the U-shaped sheet.

[0033] In this embodiment, the arrangement of the support pad 2 can reduce tearing and increase volumetric efficiency. In the prior art, the cross-sectional area of ​​the piston a3 is much smaller than the cross-sectional area of ​​the U-shaped sheet body 1. After the piston a3 is directly connected to the U-shaped sheet body 1, the two are in hard contact. As the piston a3 moves up and down, the connection between the U-shaped sheet body 1 and the piston a3 is repeatedly bent by hard contact, which makes the U-shaped sheet body 1 at this location easy to be torn, while the cross-sectional area of ​​the support bearing 2 is much larger than the cross-sectional area of ​​the piston a3 and wraps the U-shaped sheet body 1, thereby avoiding the problem of tearing at the lower part of the U-shaped sheet body 1; similarly, since the cross-sectional area of ​​the piston a3 is much smaller than the cross-sectional area of ​​the U-shaped sheet body 1, the stretching area of ​​the U-shaped sheet body 1 driven by the downward movement of the piston a3 is smaller, while the cross-sectional area of ​​the support bearing 2 is much larger than the cross-sectional area of ​​the piston a3 and wraps the U-shaped sheet body 1, which makes the stretching area of ​​the U-shaped sheet body 1 larger when the piston a3 moves downward and the support bearing 2 stretches the U-shaped sheet body 1, thereby increasing the volume of the volume cavity during a single deformation, thereby increasing the volumetric efficiency.

[0034] It is worth noting that the setting of the support bearing side edge 21 can reduce the occurrence of bulging deformation of the second U-shaped portion 13 of the U-shaped sheet. When the piston a3 moves upward to drive the U-shaped sheet body 1 to recover, the liquid in the volume chamber is compressed to form high pressure, and the high-pressure liquid acts on the deformation of the U-shaped sheet body 1, that is, the high-pressure liquid acts on the second U-shaped portion 13 of the U-shaped sheet. At this time, the second U-shaped portion 13 of the U-shaped sheet is prone to bulging and deforming laterally. At the same time, the bulging and deformed second U-shaped portion 13 of the U-shaped sheet will also produce friction with the inner side wall of the cylinder sleeve a2, thereby causing damage to the U-shaped sheet body 1. The support bearing side edge 21 in this embodiment can resist the bulging deformation of the second U-shaped portion 13 of the U-shaped sheet from the outside to the inside, thereby offsetting the pressure of the high-pressure liquid on the second U-shaped portion 13 of the U-shaped sheet. This is also the reason why "the height of the support bearing side edge 21 is not less than the thickness of the second horizontal portion 14 of the U-shaped sheet" is set in this way in this embodiment.

[0035] It is also worth mentioning that due to the setting of the support bearing side edge 21, when the piston a3 moves upward, the support bearing side edge 21 may also come into hard contact with the first horizontal portion 11 of the U-shaped piece and cause the first horizontal portion 11 of the U-shaped piece to bend. Therefore, in this embodiment, the height of the support bearing side edge 21 is set to be no higher than the thickness of the second U-shaped portion 13 of the U-shaped piece. After such setting, due to the pressure against the first U-shaped portion 12 and the second U-shaped portion 13 of the U-shaped piece, the support bearing side edge 21 will not come into contact with the first horizontal portion 11 of the U-shaped piece when the piston a3 moves upward, thereby avoiding the problem of tearing or damage of the first horizontal portion 11 of the U-shaped piece due to the reciprocating motion of the support bearing 2.

[0036] Furthermore, a support bearing connecting hole 23 for connecting with the piston a3 is provided in the middle of the support bearing horizontal portion 22, and a support bearing upper accommodating portion 24 and a support bearing lower accommodating portion 25 are respectively provided in the middle of the upper and lower surfaces of the support bearing horizontal portion 22, and the support bearing connecting hole 23 passes through the lower and upper surfaces of the support bearing upper accommodating portion 24 and the support bearing lower accommodating portion 25.

[0037] In this embodiment, a connecting piece, such as a bolt, a stud bolt, etc., is passed through the U-shaped piece connecting hole 17 and the support bearing connecting hole 23 to connect the U-shaped piece body 1, the support bearing 2 and the piston a3; the upper receiving portion 24 of the support bearing is used to accommodate the lower protrusion 16 of the U-shaped piece, and under the extrusion action of the connecting piece, the lower protrusion 16 of the U-shaped piece realizes the extrusion sealing of the upper receiving portion 24 of the support bearing and the connecting piece, thereby isolating the engine oil in the piston cavity and the liquid in the volume cavity to realize oil-liquid separation, and the lower receiving portion 25 of the support bearing is used to dock and position the piston a3.

[0038] Furthermore, the support bearing horizontal portion 22 is provided with a support bearing oil seepage hole 26 penetrating through the upper and lower surfaces of the support bearing horizontal portion 22 .

[0039] In this embodiment, the setting of the support bearing oil seepage hole 26 can prevent the deformation of the second horizontal part 14 of the U-shaped piece by leaking the engine oil. Since the piston cavity is filled with engine oil for lubrication, when the piston a3 moves downward to drive the U-shaped piece body 1 to stretch, the engine oil in the piston cavity will enter between the support bearing horizontal part 22 and the second horizontal part 14 of the U-shaped piece. When the piston a3 moves upward to drive the U-shaped piece body 1 to recover, the liquid in the volume cavity is compressed to form high pressure, and the high-pressure liquid acts on the second horizontal part 14 of the U-shaped piece. At the same time, the piston a3 moves upward to push the second horizontal part 14 of the U-shaped piece. At this time, due to the pressure of the high-pressure liquid and the thrust of the piston a3, the support bearing 2 and the U-shaped piece body 1 are in close contact, and the engine oil between the support bearing horizontal part 22 and the second horizontal part 14 of the U-shaped piece will act on the second horizontal part 14 of the U-shaped piece in the opposite direction when there is nowhere to go, thereby causing the second horizontal part 14 of the U-shaped piece to bulge and deform. The support bearing oil seepage hole 26 in this embodiment can allow the engine oil to smoothly flow back to the piston chamber at this time, thereby avoiding deformation of the second horizontal portion 14 of the U-shaped piece.

[0040] Furthermore, it also includes a fixing plate 3, which is abutted against the upper surface of the second horizontal portion 14 of the U-shaped piece, and is used to seal and fix the U-shaped piece body 1 and the connection between the support bearing 2 and the piston a3.

[0041] In this embodiment, the fixed plate 3, on the one hand, realizes the fixed connection between the fixed plate 3, the U-shaped sheet body 1, the support bearing 2 and the piston a3; on the other hand, it increases the deformation area of ​​the second horizontal portion 14 of the U-shaped sheet of the U-shaped sheet body 1, thereby increasing the deformation volume of the volume chamber. This is because the cross-sectional area of ​​the connecting parts such as nuts is much smaller than the cross-sectional area of ​​the U-shaped sheet body 1. When the piston a3 pulls the U-shaped sheet body 1 downward to stretch, the second horizontal portion 14 of the U-shaped sheet will form a funnel shape at the bottom of the volume chamber under the action of the connecting parts. After adopting the fixed plate 3, the bottom of the volume chamber will form a cylindrical shape with the same diameter, thereby increasing the deformation volume of the volume chamber, that is, increasing the single flow rate, and then increasing the volumetric efficiency.

[0042] Furthermore, the fixing plate 3 includes a fixing plate body 31 and a fixing plate transition portion 32 disposed at the edge of the lower surface of the fixing plate body 31 .

[0043] In this embodiment, the setting of the fixed plate transition portion 32 can reduce the occurrence of tearing of the U-shaped sheet body 1. The fixed plate transition portion 32 can change the contact between the edge of the lower surface of the fixed plate 3 and the upper surface of the second horizontal portion 14 of the U-shaped sheet from line contact to surface contact, thereby avoiding the tearing of the second horizontal portion 14 of the U-shaped sheet at the contact point caused by the up and down fluctuation of the U-shaped sheet body 1, that is, the fixed plate transition portion 32 has an anti-tearing effect.

[0044] Furthermore, a fixed plate connecting hole 33 for connecting to the piston a3 is provided in the middle of the fixed plate 3, and a fixed plate upper accommodating portion 34 and a fixed plate lower accommodating portion 35 are respectively provided in the middle of the upper and lower surfaces of the fixed plate 3, and the fixed plate connecting hole 33 passes through the lower and upper surfaces of the fixed plate upper accommodating portion 34 and the fixed plate lower accommodating portion 35.

[0045] In this embodiment, the fixing plate connecting hole 33 can realize the connection between the fixing plate 3, the U-shaped plate body 1, the support bearing 2 and the piston a3 through the connecting piece, the upper accommodating portion 34 of the fixing plate can accommodate the sealing gasket, and the lower accommodating portion 35 of the fixing plate can accommodate the raised portion 15 on the U-shaped plate, which plays a sealing role under the squeezing action of the connecting piece, thereby achieving the effect of separating the engine oil in the piston chamber from the liquid in the volume chamber.

[0046] Embodiment 3:

[0047] This embodiment provides a diaphragm pump, including a diaphragm structure, and its improvement lies in that: the diaphragm structure is a double U-shaped diaphragm structure as described in any one of Embodiments 1 or 2.

[0048] When this embodiment is used, the piston a3 is connected to the support shoe 2, the U-shaped sheet body 1 and the fixed plate through a connecting piece. The first horizontal portion 11 of the U-shaped sheet body 1 is squeezed, fixed and sealed by the cylinder sleeve a2 and the pressure cover a4. The stretching and recovery of the U-shaped sheet body 1 are achieved through the up and down movement of the piston a3, thereby completing the operation of liquid suction and pressurized liquid discharge.

[0049] The diaphragm pump of the present embodiment provides a deformation path and deformation stretching amount through the first U-shaped portion 12 and the second U-shaped portion 13 of the U-shaped piece body 1, which not only reduces the occurrence of diaphragm rupture and tearing, prolongs the service life of the diaphragm pump, but also increases the fluctuation stroke of the U-shaped piece body 1, thereby increasing the single flow rate and volumetric efficiency; the support valve 2 can reduce the occurrence of diaphragm rupture and tearing problems, prevent the diaphragm from side bulging and deformation, and increase the stretching area, thereby prolonging the service life of the U-shaped piece body 1 and increasing the single flow rate and volumetric efficiency; the fixing plate 3 can reduce the occurrence of tearing problems, and increase the single flow rate and volumetric efficiency.

[0050] It should be noted that the above detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present application belongs.

[0051] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments described in the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0052] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0053] In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or inherent to these processes, methods, products, or apparatuses.

[0054] For ease of description, spatially relative terms, such as "above", "above", "on the upper surface of", "above", etc., may be used herein to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways, such as rotated 90 degrees or in other orientations, and the spatially relative descriptions used herein are interpreted accordingly.

[0055] In the above detailed description, reference is made to the accompanying drawings, which form a part of this document. In the accompanying drawings, similar symbols typically identify similar components unless the context indicates otherwise. The illustrated embodiments described in the detailed description, drawings, and claims are not meant to be limiting. Other embodiments may be used, and other changes may be made, without departing from the spirit or scope of the subject matter presented herein.

[0056] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A double U-shaped diaphragm structure, comprising an integrally formed U-shaped sheet body (1), characterized in that: The U-shaped sheet body (1) comprises a U-shaped sheet first horizontal portion (11), at least one U-shaped sheet first U-shaped portion (12), at least one U-shaped sheet second U-shaped portion (13), and a U-shaped sheet second horizontal portion (14); one end of the U-shaped sheet first U-shaped portion (12) located at the top layer is connected to the U-shaped sheet first horizontal portion (11), and the other end is connected to the U-shaped sheet second U-shaped portion (13); one end of the U-shaped sheet second U-shaped portion (13) located at the bottom layer is connected to the U-shaped sheet first U-shaped portion (12), and the other end is connected to the U-shaped sheet second horizontal portion (14); the number of the U-shaped sheet first U-shaped portions (12) and the number of the U-shaped sheet second U-shaped portions (13) are equal.

2. A double U-shaped diaphragm structure according to claim 1, characterized in that: A U-shaped sheet edge protrusion (18) is provided on the upper surface of the first horizontal portion (11) of the U-shaped sheet near the outer edge.

3. A double U-shaped diaphragm structure according to claim 1, characterized in that: A U-shaped sheet connection hole (17) for connecting with the piston (a3) ​​is provided in the middle of the second horizontal portion (14) of the U-shaped sheet, and a U-shaped sheet upper protrusion (15) and a U-shaped sheet lower protrusion (16) for sealing are provided in the middle of the upper and lower surfaces of the second horizontal portion (14) of the U-shaped sheet, respectively. The U-shaped sheet connection hole (17) passes through the upper and lower surfaces of the U-shaped sheet upper protrusion (15) and the U-shaped sheet lower protrusion (16).

4. A double U-shaped diaphragm structure according to claim 1, characterized in that: The invention also comprises a support pad (2), wherein the support pad (2) is supported on the lower part of the U-shaped sheet body (1), and the support pad (2) comprises a support pad horizontal part (22) abutting against the lower surface of the second horizontal part (14) of the U-shaped sheet, and support pad side parts (21) arranged on both sides of the support pad horizontal part (22), and a part of the second U-shaped part (13) of the U-shaped sheet is accommodated in the support pad side parts (21), and the height of the support pad side parts (21) is not less than the thickness of the second horizontal part (14) of the U-shaped sheet and not more than the thickness of the second U-shaped part (13) of the U-shaped sheet.

5. A double U-shaped diaphragm structure according to claim 4, characterized in that: A support bearing connecting hole (23) for connecting with the piston (a3) ​​is provided in the middle of the support bearing horizontal part (22), and a support bearing upper accommodating part (24) and a support bearing lower accommodating part (25) are provided in the middle of the upper and lower surfaces of the support bearing horizontal part (22), respectively, and the support bearing connecting hole (23) passes through the lower and upper surfaces of the support bearing upper accommodating part (24) and the support bearing lower accommodating part (25).

6. A double U-shaped diaphragm structure according to claim 4, characterized in that: The support bearing horizontal portion (22) is provided with a support bearing oil seepage hole (26) penetrating the upper and lower surfaces of the support bearing horizontal portion (22).

7. A double U-shaped diaphragm structure according to claim 4, characterized in that: It also includes a fixing plate (3), which is abutted against the upper surface of the second horizontal portion (14) of the U-shaped piece, and is used to seal and fix the connection between the U-shaped piece body (1) and the support bearing (2) and the piston (a3).

8. A double U-shaped diaphragm structure according to claim 7, characterized in that: The fixing plate (3) comprises a fixing plate body (31) and a fixing plate transition portion (32) arranged at the edge of the lower surface of the fixing plate body (31).

9. A double U-shaped diaphragm structure according to claim 7, characterized in that: A fixing plate connecting hole (33) for connecting with the piston (a3) ​​is provided in the middle of the fixing plate (3), and a fixing plate upper accommodating portion (34) and a fixing plate lower accommodating portion (35) are provided in the middle of the upper and lower surfaces of the fixing plate (3), respectively. The fixing plate connecting hole (33) passes through the lower and upper surfaces of the fixing plate upper accommodating portion (34) and the fixing plate lower accommodating portion (35).

10. A diaphragm pump, comprising a diaphragm structure, characterized in that: The diaphragm structure is a double U-shaped diaphragm structure as described in any one of claims 1-9.

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