Diaphragm pump

Abstract

The utility model provides a diaphragm pump, and relates to the field of mechanical engineering. The diaphragm pump comprises a pump body, a pump head, a pump frame and a driving assembly, the pump body is provided with a pumping assembly, a pump cover, a shaft frame and a connecting sealing gasket, the pumping assembly is provided with a crankshaft, a connecting rod, a piston, a diaphragm frame, a diaphragm, a valve frame, an umbrella valve and a cylinder gasket, the crankshaft is provided with a half shaft, a shaft pin A, a shaft pin B and a bearing, and the connecting rod is provided with a main connecting rod, an auxiliary connecting rod and a pin. The driving assembly is provided with a motor, a rack and a coupling piece, the pumping assembly is arranged in the pump cover, the shaft brackets are arranged at the two ends of the pump cover, the crankshaft is sequentially connected with the shaft brackets, the main connecting rod, the pump head, the pump body and the pump frame in series and fixed in sequence, the driving assembly is fixed to the outer side of the pump frame, and the motor drives the crankshaft to rotate through the coupling piece. The piston pushes the diaphragm to stir and pump fluid back and forth, the pump bodies are matched with the shaft pin B and the connecting sealing gasket to achieve multi-stage pump body connection, the annular and stacked structural layout is arranged, and the requirement for different pumping flows is met.

Description

TECHNICAL FIELD

[0001] The application relates to the field of mechanical engineering, in particular to a diaphragm pump. BACKGROUND

[0002] In the prior art, the pumping mode of the diaphragm pump is the circumferential movement of a motor, and a diaphragm in the pump is made to move reciprocatingly through a mechanical device; in the case of the same number of revolutions of the motor, the size and number of the diaphragms determine the amount of gas or liquid pumped by the diaphragm pump in unit time; the layout of the diaphragms of the existing diaphragm pump is a left-right symmetrical double-diaphragm structure, or a single-face multi-hole structure, and the number of holes is mainly 3 to 6, and the number of diaphragms is relatively small, so that the amount of gas or liquid pumped in unit time is relatively small, and the smaller the number of diaphragms, the poorer the flow stability of the pumped gas or liquid.

[0003] Therefore, there is an urgent need for a technical scheme which is reasonable in structure and can effectively improve the flow and pumping stability of the diaphragm pump. CONTENT OF THE UTILITY MODEL

[0004] The application aims to provide a diaphragm pump to solve the above technical problems.

[0005] To achieve the above object, the application provides the following technical scheme: the application provides a diaphragm pump, which comprises a pump body, a pump head, a pump frame and a driving assembly, the pump body is provided with a pumping assembly, a pump cover, a shaft support and a coupling sealing gasket, the pumping assembly is provided with a crankshaft, a connecting rod, a piston, a diaphragm support, a diaphragm, a valve support, an umbrella valve and a cylinder gasket, the crankshaft is provided with a half shaft, a shaft pin A, a shaft pin B and a bearing, the connecting rod is provided with a main connecting rod, an auxiliary connecting rod and a pin, the driving assembly is provided with a motor, a frame and a shaft coupling, the pumping assembly is arranged in the pump cover, the shaft support is arranged at both ends of the pump cover, the crankshaft is sequentially connected with the shaft support and the main connecting rod, the pump head, the pump body and the pump frame are sequentially connected and fixed, the driving assembly is fixed outside the pump frame, the motor drives the crankshaft to rotate through the shaft coupling, the crankshaft drives the connecting rod and the piston to move reciprocatingly, the piston pushes the diaphragm to pump fluid back and forth, and the shaft pin B and the coupling sealing gasket are matched between the pump bodies to realize multi-stage pump body connection, an annular structure and a stacked structure are arranged, and the demand for different pumping flows is met.

[0006] Optionally, the crankshaft is in a split structure and is composed of the half shaft, the shaft pin A, the shaft pin B and the bearing, and one crankshaft of the pump body is composed of two half shafts, one shaft pin A and three bearings; the connecting rod is in a split star structure, the auxiliary connecting rod is hinged to the main connecting rod through the pin, and one complete connecting rod is composed of one main connecting rod, multiple auxiliary connecting rods and multiple sets of pins; and the number of the auxiliary connecting rods is the same as that of the pins.

[0007] Optionally, the piston is provided with a membrane head, a connecting rod seat and a slide rail in structure, the membrane holder is provided with a diaphragm positioning ring and a membrane groove in structure, the diaphragm is provided with a membrane sleeve, a membrane cavity and a membrane lug in structure, the shaft holder is provided with a shaft hole and a slide groove in structure, the slide grooves are evenly distributed radially outside the shaft hole, the outer shape of the membrane head and the inner cavity shape of the membrane sleeve are both circular, the slide rail has the same structure as the slide groove, and the slide rail can slide in the slide groove.

[0008] Optionally, the valve holder is provided with a valve holder assembly hole, a separation groove, a valve hole, a suction hole, a pump-out hole and a valve holder positioning block, the separation groove is provided in a double-ring structure, and the separation groove is arranged outside the suction hole and the pump-out hole, and the suction hole and the pump-out hole are both arranged outside the valve hole; the membrane holder is provided with a diaphragm positioning ring and a membrane groove, the cylinder gasket is provided with a cylinder gasket groove, the outer shape of the cylinder gasket is provided in a double-ring structure with a single-sided groove, and the outer shape of the cylinder gasket is the same as the structure of the separation groove; the distribution positions of the valve holder assembly hole and the diaphragm positioning ring are matched, and the diaphragm positioning ring can be inserted into the valve holder assembly hole.

[0009] Optionally, the structure of the pump cover is provided in an annular structure with an outer circle and an inner square, and the inner empty part of the pump cover is provided in a regular polygon structure, and the pump cover is further provided with a coupling mouth A, a pump suction port, a pump port, a coupling mouth B, a coupling groove A, a coupling groove B, a sealing ring, a membrane holder fixing hole, a sealing groove A, a sealing groove B, a pump cover fixing hole and a valve holder positioning groove in structure, the coupling mouth A and the coupling mouth B are provided in a hollow truncated cone shape, the coupling groove A and the coupling groove B are provided in an inverted conical circular groove, the coupling mouth A, the coupling groove A and the pump suction port are communicated with each other, and the coupling mouth B, the coupling groove B and the pump port are communicated with each other; the coupling mouth A, the pump suction port, the pump port, the coupling mouth B, the coupling groove A, the coupling groove B, the sealing ring, the membrane holder fixing hole, the sealing groove A, the sealing groove B, the pump cover fixing hole and the valve holder positioning groove are arranged on the pump cover, and the outer shape of the coupling mouth A and the coupling mouth B is matched with the inner structure of the coupling groove A and the coupling groove B.

[0010] Optionally, the pump head is provided with a coupling groove C, a coupling groove D, a pump head fixing hole, an outer interface A and an outer interface B in structure, the coupling groove C and the coupling groove D are provided in an inverted conical circular groove, the pump head fixing hole is provided in a through-hole structure, the coupling groove C is communicated with the outer interface A, and the coupling groove D is communicated with the outer interface B.

[0011] Optionally, the pump frame is provided with a plug, a pump frame fixing hole, a sealing groove C and a rack hole in structure, the plug is provided as a truncated cone structure, the pump frame fixing hole and the rack hole are circular through hole structures, the plug is symmetrically distributed on both sides of the pump frame fixing hole, the plug and the pump frame fixing hole are arranged in the sealing groove C, and the plug, the pump frame fixing hole and the sealing groove C are arranged on the end face of the pump frame.

[0012] Optionally, the coupling sealing gasket is provided with a coupling sealing nozzle and a coupling hole in structure, the coupling sealing nozzle is a hollow truncated cone structure, and the coupling hole is a circular through hole structure.

[0013] Optionally, the driving assembly is provided with a motor, a rack, a coupling, a motor screw and a rack screw.

[0014] The beneficial effects of the embodiments of the present application include:

[0015] The present application can assemble more diaphragms by arranging the crankshaft matched with the star-shaped connecting rod and the ring-arranged pumping assembly, so as to effectively improve the pumping flow of the diaphragm pump, and the number of the pumping assemblies and the number of the stacked pump bodies can be configured according to actual needs, so as to realize the required pumping flow and stability.

[0016] The present application facilitates the production and assembly of the pump body by arranging the split structure of the crankshaft.

[0017] The present application improves the precision and stability of the interlayer assembly of the pump body by arranging the annular pump cover. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0019] Figure 1 The present application provides an appearance schematic diagram of a diaphragm pump;

[0020] Figure 2 The present application provides a double-layer pump body structure schematic diagram of a diaphragm pump;

[0021] Figure 3 The present application provides an exploded view of a diaphragm pump;

[0022] Figure 4 The present application provides an exploded view of a double-layer pump body;

[0023] Figure 5 Pump body disassembly diagram provided for the embodiments of the present application;

[0024] Figure 6 Pumping assembly disassembly diagram provided for the embodiments of the present application;

[0025] Figure 7 Crankshaft disassembly diagram provided for the embodiments of the present application;

[0026] Figure 8 Connecting rod assembly schematic diagram provided for the embodiments of the present application;

[0027] Figure 9 Piston structure schematic diagram provided for the embodiments of the present application;

[0028] Figure 10 Valve holder, membrane holder, umbrella valve, cylinder gasket structure schematic diagram provided for the embodiments of the present application;

[0029] Figure 11 Diaphragm structure schematic diagram provided for the embodiments of the present application;

[0030] Figure 12 Crankshaft, connecting rod, piston, shaft holder assembly schematic diagram provided for the embodiments of the present application;

[0031] Figure 13 Pump cover structure schematic diagram one provided for the embodiments of the present application;

[0032] Figure 14 Pump cover structure schematic diagram two provided for the embodiments of the present application;

[0033] Figure 15 Shaft holder structure schematic diagram provided for the embodiments of the present application;

[0034] Figure 16 Pump head structure schematic diagram one provided for the embodiments of the present application;

[0035] Figure 17 Pump head structure schematic diagram two provided for the embodiments of the present application;

[0036] Figure 18 Pump holder structure schematic diagram provided for the embodiments of the present application;

[0037] In the figure: 01, diaphragm pump, 10, pump body, 11, pumping assembly, 111, crankshaft, 1111, half shaft, 1112, shaft pin A, 1113, bearing, 1114, shaft pin B, 112, connecting rod, 1121, main connecting rod, 1122, auxiliary connecting rod, 1123, pin, 113, piston, 1131, membrane head, 1132, connecting rod seat, 1133, slide rail, 114, membrane holder, 1141, diaphragm positioning ring, 1142, membrane groove, 115, diaphragm, 1151, membrane sleeve, 1152, membrane cavity, 1153, membrane ear, 116, valve holder, 1161, valve holder assembly hole, 1162, separation groove, 1163, valve hole, 1164, suction hole, 1165, pump outlet hole, 1166, valve holder positioning block, 117, umbrella valve, 118, cylinder gasket, 1181, cylinder gasket groove, 12, pump cover, 1201, coupling nozzle A, 1202, pump suction port, 1203, pumping port, 1204, coupling nozzle B, 1205, coupling groove A, 1206, coupling groove B, 1207, sealing ring, 1208, membrane holder fixing hole, 1209, sealing groove A, 1210, sealing groove B, 1211, pump cover fixing hole, 1212, valve holder positioning groove, 13, shaft holder, 131, shaft hole, 132, slide groove, 14, coupling sealing gasket, 141, coupling sealing nozzle, 142, coupling hole, 15, pump body screw, 20, pump head, 201, coupling groove C, 202, coupling groove D, 203, pump head fixing hole, 204, external interface A, 205, external interface B, 30, pump holder, 301, plug, 302, pump holder fixing hole, 303, sealing groove C, 304, motor hole, 40, driving assembly, 41, motor, 42, frame, 43, coupling piece, 44, motor screw, 45, frame screw, 50, packaging screw. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present application.

[0040] It should be noted that similar reference numbers and letters refer to similar items in the following drawings, and therefore, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

[0041] In the description of the present application, it should be noted that the terms "inner", "outer" and the like indicate the positional or location relationship based on the positional or location relationship shown in the drawings, or the positional or location relationship when the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application.

[0042] In the description of the present application, it should also be noted that unless otherwise explicitly specified and limited, the terms "provided", "coupled" should be understood broadly, for example, it can be fixedly coupled, or it can be detachably coupled, or integrally coupled; it can be directly connected, or indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] As shown in Figures 1 to 16 The present embodiment provides a diaphragm pump 01, which comprises a pump body 10, a pump head 20, a pump frame 30 and a driving assembly 40, the pump body 10 is provided with a pumping assembly 11, a pump cover 12, a shaft support 13 and a coupling sealing gasket 14, the pumping assembly 11 is provided with a crankshaft 111, a connecting rod 112, a piston 113, a diaphragm support 114, a diaphragm 115, a valve support 116, an umbrella valve 117 and a cylinder gasket 118, the crankshaft 111 is provided with a half shaft 1111, a shaft pin A 1112, a shaft pin B 1114 and a bearing 1113, the connecting rod 112 is provided with a main connecting rod 1121, a secondary connecting rod 1122 and a pin 1123, the driving assembly 40 is provided with a motor 41, a frame 42 and a shaft coupling 43, the pumping assembly 11 is installed in the pump cover 12, the shaft support 13 is arranged at both ends of the pump cover 12, the crankshaft 111 is sequentially connected with the main connecting rod 1121 through the shaft support 13, the pump head 20, the pump body 10 and the pump frame 30 are sequentially connected and fixed, the driving assembly 40 is fixed outside the pump frame 30, the motor 41 drives the crankshaft 111 to rotate through the shaft coupling 43, the crankshaft 111 drives the connecting rod 112 and the piston 113 to reciprocate, the piston 113 pushes the diaphragm 115 to pump fluid back and forth, the shaft pin B 1114 and the coupling sealing gasket 14 are matched to realize multi-stage pump body coupling, and the annular and stacked structure layout is arranged to meet the demand of different pumping flow.

[0044] Specifically, the crankshaft 111 is provided in a split structure and is composed of the half shaft 1111, the shaft pin A 1112, the shaft pin B 1114 and the bearing 1113. One crankshaft 111 of the pump body 10 is composed of two half shafts 1111, one shaft pin A 1112 and three bearings 1113. The half shafts 1111 are connected at both ends of the shaft pin A 1112. One of the three bearings 1113 is arranged between the two half shafts 1111, and the other two bearings 1113 are arranged at the outer ends of the half shafts 1111. The connecting rod 112 is provided in a split star structure. The sub connecting rod 1122 is hinged to the main connecting rod 1121 through the pin 1123. One complete connecting rod 112 is composed of one main connecting rod 1121, multiple sub connecting rods 1122 and multiple sets of pins 1123. The number of the sub connecting rods 1122 and the pins 1123 is the same, and the optimal number of the sub connecting rods 1122 and the pins 1123 is five.

[0045] Specifically, one end of the sub connecting rod 1122 is hinged to the main connecting rod 1121 through the pin 1123, and the other end is hinged to the connecting rod seat 1132 through the pin 1123. The shaft support 13 is provided with shaft holes 131 and sliding grooves 132. The sliding grooves 132 are radially distributed outside the shaft holes 131. The outer shape of the membrane head 1131 and the inner cavity shape of the membrane sleeve 1151 are both circular. The slide rails 1133 have the same structure as the sliding grooves 132. The slide rails 1133 can slide in the sliding grooves 132. The inner diameter of the shaft hole 131 is the same as the outer diameter of the bearing 1113. One shaft support 13 is symmetrically arranged at each end of the pump cover 12, and the pumping assembly 11 is arranged inside the two shaft supports 13. The crankshaft 111 is connected with the shaft hole 131 and the main connecting rod 1121. The slide rails 1133 are clamped into the sliding grooves 132. When the crankshaft 111 rotates, the crankshaft 111 drives the connecting rod 112 to reciprocate and rotate. The slide rails 1133 clamped into the sliding grooves 132 restrict the movement direction of the piston 113. The reciprocating and rotating connecting rod 112 drives the piston 113 to perform reciprocating linear motion. The piston 113 reciprocates to press the diaphragm 115, thereby realizing fluid pumping.

[0046] Specifically, the piston 113 is provided with a membrane head 1131, a connecting rod seat 1132 and a sliding rail 1133 in structure, the membrane holder 114 is provided with a diaphragm positioning ring 1141 and a membrane groove 1142 in structure, the diaphragm 115 is provided with a membrane sleeve 1151, a membrane cavity 1152 and membrane ears 1153 in structure, the membrane ears 1153 are uniformly distributed on the outer edge of the diaphragm 115, and the number of the membrane ears 1153 is the same as that of the diaphragm positioning ring 1141, the valve holder 116 is provided with a valve holder assembly hole 1161, a separation groove 1162, a valve hole 1163, a suction hole 1164, a pump-out hole 1165 and a valve holder positioning block 1166, the number of the valve holder assembly hole 1161 is the same as that of the diaphragm positioning ring 1141, and the distribution position of the valve holder assembly hole 1166 matches that of the diaphragm positioning ring 1141, the separation groove 1162 is provided in a double-ring structure, and the separation groove 1162 is arranged outside the suction hole 1164 and the pump-out hole 1165, and the suction hole 1164 and the pump-out hole 1165 are both annularly arranged outside the valve hole 1163; the cylinder gasket 118 is provided with a cylinder gasket groove 1181, and the outer shape structure of the cylinder gasket 118 is provided in a double-ring structure with a single-sided groove, and the outer shape structure of the cylinder gasket 118 is the same as that of the separation groove 1162, and the umbrella valve 117 is reversely assembled on the valve hole 1163, respectively; during assembly, the membrane sleeve 1151 is first passed through the membrane groove 1142, the membrane sleeve 1151 is sleeved on the membrane head 1131, the membrane ears 1153 are sleeved on the diaphragm positioning ring 1141, the diaphragm 115 is clamped between the membrane holder 114 and the valve holder 116, and when the pump body screw 15 is fastened, the membrane holder 114 and the valve holder 116 press the diaphragm 115.

[0047] Specifically, the pump cover 12 is arranged in an annular structure with an outer circle and an inner square, the inner empty part of the pump cover 12 is a regular polygon structure, and the structure layout of a regular hexagon is optimal, the pump cover 12 is further provided with a coupling mouth A1201, a pump suction port 1202, a pumping port 1203, a coupling mouth B1204, a coupling groove A1205, a coupling groove B1206, a sealing ring 1207, a membrane frame fixing hole 1208, a sealing groove A1209, a sealing groove B1210, a pump cover fixing hole 1211 and a valve frame positioning groove 1212 in the structure, the coupling mouth A1201 and the coupling mouth B1204 are arranged in a hollow truncated cone shape, the coupling groove A1205 and the coupling groove B1206 are arranged in an inverted conical circular groove, the coupling mouth A1201, the coupling groove A1205 and the pump suction port 1202 are communicated with each other, and the coupling mouth B1204, the coupling groove B1206 and the pumping port 1203 are communicated with each other; the coupling mouth A1201, the coupling mouth B1204 and the sealing groove A1209 are arranged at one end of the pump cover 12, the coupling groove A1205, the coupling groove B1206 and the sealing groove B1210 are arranged at the other end of the pump cover 12, the pump suction port 1202, the pumping port 1203 and the sealing ring 1207 are arranged on the inner side of the pump cover 12, the membrane frame fixing hole 1208 is arranged on the outer side of the sealing ring 1207, the membrane frame fixing hole 1208 is a through hole structure, the pump cover fixing hole 1211 penetrates through both ends of the pump cover 12, the valve frame positioning groove 1212 is arranged along the edge on the inner side of the pump cover 12, and the outer shape of the coupling mouth A1201 and the coupling mouth B1204 matches the inner structure of the coupling groove A1205 and the coupling groove B1206; when assembling, the ungrooved end of the cylinder gasket 118 is first assembled into the separation groove 1162 inwards, then the cylinder gasket groove 1181 is sleeved on the sealing ring 1207, the valve frame positioning block 1166 is clamped into the valve frame positioning groove, and the pump body screw 15 is screwed from the outer side of the membrane frame fixing hole 1208 to assemble the pumping assembly 11 on the inner side of the pump cover 12.

[0048] Specifically, the pump head 20 is provided with a coupling groove C201, a coupling groove D202, a pump head fixing hole 203, an outer interface A204 and an outer interface B205 in the structure, the coupling groove C201 and the coupling groove D202 are arranged in an inverted conical circular groove, the pump head fixing hole 203 is arranged in a through hole structure, the coupling groove C201 is communicated with the outer interface A204, and the coupling groove D202 is communicated with the outer interface B205; when the diaphragm pump 01 works, fluid is sucked from the outer interface 204, enters the pump body 10 after passing through the coupling groove C201, and is then pumped out through the coupling groove D202 and the outer interface B205.

[0049] Specifically, the pump frame 30 is provided with a plug 301, a pump frame fixing hole 302, a sealing groove C 303 and a rack hole 304. The plug 301 is provided in a truncated cone structure. The pump frame fixing hole 302 and the rack hole 304 are circular through-hole structures. The plug 301 is symmetrically distributed on both sides of the pump frame fixing hole 302. The plug 301 and the pump frame fixing hole 302 are arranged in the sealing groove C 303. The plug 301, the pump frame fixing hole 302 and the sealing groove C 303 are arranged on the end face of the pump frame 30. The plug 301 has the same size and shape as the coupling nozzle A1201 and the coupling nozzle B1204.

[0050] Specifically, the coupling sealing gasket 14 is provided with a coupling sealing nozzle 141 and a coupling hole 142. The coupling sealing nozzle 141 is a hollow truncated cone structure. The coupling hole 142 is a circular through-hole structure. The coupling sealing nozzle 141 is symmetrically distributed on both sides of the coupling hole 142. The internal structure of the coupling sealing nozzle 141 is the same as the shape of the plug 301, the coupling nozzle A1201 and the coupling nozzle B1204. When assembled, the coupling sealing gasket 14 is sleeved on the plug 301, the coupling nozzle A1201 and the coupling nozzle B1204. The coupling sealing gasket 14 can ensure the sealing performance of the pump body 10 when the pump body 10 is connected with the pump body 10, the pump head 20 and the pump frame 30. The plug 301 cooperates with the coupling sealing gasket 14 to seal the coupling groove A1205 and the coupling groove B1206.

[0051] Specifically, the drive assembly 40 is provided with a motor 41, a rack 42, a coupling piece 43, a motor screw 44 and a rack screw 45. The motor 41 is assembled on the rack 42 through the motor screw 43. The rack 42 is assembled on the pump frame 30 through the rack screw 45. The motor 41 is connected with the crankshaft 111 through the coupling piece 43. The drive assembly 40, the pump frame 30, the pump body 10 and the pump head 20 are connected and fixed through the packaging screw 50. The pump body 10 can be assembled according to the actual pumping flow. The length of the packaging screw 50 can be adjusted according to the number of the pump body 10.

[0052] Specifically, the motor 41 drives the crankshaft 111 to rotate through the coupling 43, the crankshaft 111 drives the connecting rod 112 to reciprocate, the connecting rod 112 drives the piston 113 to reciprocate, the piston 113 reciprocally pushes and pulls the diaphragm 115, when the piston 113 pulls down the diaphragm 115, the umbrella valve 117 assembled on the valve hole 1163 and on the same side of the pump outlet hole 1165 prevents fluid from entering from the pump outlet hole, fluid can only enter into the membrane cavity 1152 from the external interface A 204, the coupling groove C 201, the coupling nozzle A 1201, the pump suction port 1202, the suction hole 1164 in turn, when the piston 113 pushes up and extrudes the diaphragm 115, the umbrella valve 117 assembled on the valve hole 1163 and on the same side of the suction hole 1164 prevents fluid from being discharged from the suction hole 1164, the fluid in the membrane cavity 1152 is pressed and pumped out from the pump outlet hole 1165, the pumping port 1203, the coupling nozzle B 1204, the coupling groove D 202, the external interface B 205 in turn, when a single pump body 10 cannot meet the required flow, two or more pump bodies 10 can be selected for stacked assembly.

[0053] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and variations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of the present application being defined by the appended claims and their equivalents.

Claims

1. A diaphragm pump characterized by, It includes: Pump body, pump head, pump frame and drive assembly, the pump body is provided with pumping assembly, pump cover, shaft support and coupling sealing pad, the pumping assembly is provided with crankshaft, connecting rod, piston, membrane support, diaphragm, valve support, umbrella valve and cylinder pad, the crankshaft is provided with half shaft, shaft pin A, shaft pin B and bearing, the connecting rod is provided with main connecting rod, auxiliary connecting rod and pin, the drive assembly is provided with motor, frame and shaft coupling, the pumping assembly is installed in the pump cover, the shaft support is arranged at both ends of the pump cover, the crankshaft is sequentially connected with the main connecting rod through the shaft support, the pump head, the pump body and the pump frame are sequentially connected and fixed, the drive assembly is fixed outside the pump frame, the motor drives the crankshaft to rotate through the shaft coupling, the crankshaft drives the connecting rod and the piston to reciprocate, the piston pushes the diaphragm to pump fluid back and forth, the pump body is connected with the shaft pin B and the coupling sealing pad to realize multi-stage pump body connection, and the annular and stacked structure layout is arranged to meet the demand of different pumping flow.

2. The membrane pump of claim 1, wherein, The crankshaft is arranged in a split structure and is composed of the half shaft, the shaft pin A, the shaft pin B and the bearing, and the connecting rod is arranged in a split star structure, and the auxiliary connecting rod is hinged to the main connecting rod through the pin.

3. The membrane pump of claim 1, wherein, The piston is provided with a membrane head, a connecting rod seat and a sliding rail in structure, the membrane support is provided with a diaphragm positioning ring and a membrane groove in structure, the diaphragm is provided with a membrane sleeve, a membrane cavity and a membrane lug in structure, the shaft support is provided with a shaft hole and a sliding groove in structure, and the sliding groove is radially distributed outside the shaft hole.

4. The membrane pump of claim 1, wherein, The valve support is provided with a valve support assembly hole, a separation groove, a valve hole, a suction hole, a pump outlet hole and a valve support positioning block; the separation groove is arranged in a double-ring structure, and the separation groove is arranged outside the suction hole and the pump outlet hole, and the suction hole and the pump outlet hole are arranged outside the valve hole in a ring shape; the membrane support is provided with a diaphragm positioning ring and a membrane groove, the cylinder pad is provided with a cylinder pad groove, and the outer shape structure of the cylinder pad is arranged in a double-ring structure with a single-sided groove, and the outer shape structure of the cylinder pad is the same as that of the separation groove.

5. The membrane pump of claim 1, wherein, The structure of the pump cover is arranged in an annular structure with an outer circle and an inner square, and the inner space of the pump cover is a regular polygon structure, and the pump cover is further provided with a coupling nozzle A, a pump suction port, a pumping port, a coupling nozzle B, a coupling groove A, a coupling groove B, a sealing ring, a membrane support fixing hole, a sealing groove A, a sealing groove B, a pump cover fixing hole and a valve support positioning groove in structure, the coupling nozzle A and the coupling nozzle B are arranged in a hollow truncated cone shape, the coupling groove A and the coupling groove B are arranged in an inverted conical circular groove, and the coupling nozzle A, the coupling groove A and the pump suction port are communicated with each other, and the coupling nozzle B, the coupling groove B and the pumping port are communicated with each other.

6. The membrane pump of claim 1, wherein, The pump head is provided with a coupling groove C, a coupling groove D, a pump head fixing hole, an external interface A and an external interface B in structure, the coupling groove C and the coupling groove D are arranged in an inverted conical circular groove, the pump head fixing hole is arranged in a through hole structure, the coupling groove C is communicated with the external interface A, and the coupling groove D is communicated with the external interface B.

7. The membrane pump of claim 1, wherein, The pump frame is structurally provided with a plug, a pump frame fixing hole, a sealing groove C and a frame hole, the plug is provided as a truncated cone structure, the pump frame fixing hole and the frame hole are circular through-hole structures, the plugs are symmetrically distributed on both sides of the pump frame fixing hole, the plug and the pump frame fixing hole are both arranged in the sealing groove C, and the plug, the pump frame fixing hole and the sealing groove C are annularly arranged on the pump frame end face.

8. The membrane pump of claim 1, wherein, The coupling sealing gasket is structurally provided with a coupling sealing nozzle and a coupling hole, the coupling sealing nozzle is a hollow truncated cone structure, and the coupling hole is a circular through-hole structure, the coupling sealing nozzles are symmetrically distributed on both sides of the coupling hole.

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