WO2021016826A1 - 隔膜泵 - Google Patents

隔膜泵 Download PDF

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Publication number
WO2021016826A1
WO2021016826A1 PCT/CN2019/098250 CN2019098250W WO2021016826A1 WO 2021016826 A1 WO2021016826 A1 WO 2021016826A1 CN 2019098250 W CN2019098250 W CN 2019098250W WO 2021016826 A1 WO2021016826 A1 WO 2021016826A1
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WO
WIPO (PCT)
Prior art keywords
diaphragm
pump
fastener
pump according
cavity
Prior art date
Application number
PCT/CN2019/098250
Other languages
English (en)
French (fr)
Inventor
舒展
万道玉
Original Assignee
深圳市大疆创新科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳市大疆创新科技有限公司 filed Critical 深圳市大疆创新科技有限公司
Priority to PCT/CN2019/098250 priority Critical patent/WO2021016826A1/zh
Priority to CN201980030042.0A priority patent/CN112135971A/zh
Publication of WO2021016826A1 publication Critical patent/WO2021016826A1/zh

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
    • A01M7/00—Special adaptations or arrangements of liquid-spraying apparatus for purposes covered by this subclass
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
    • A01M7/00—Special adaptations or arrangements of liquid-spraying apparatus for purposes covered by this subclass
    • A01M7/005—Special arrangements or adaptations of the spraying or distributing parts, e.g. adaptations or mounting of the spray booms, mounting of the nozzles, protection shields
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
    • B64D1/00—Dropping, ejecting, releasing, or receiving articles, liquids, or the like, in flight
    • B64D1/16—Dropping or releasing powdered, liquid, or gaseous matter, e.g. for fire-fighting
    • B64D1/18—Dropping or releasing powdered, liquid, or gaseous matter, e.g. for fire-fighting by spraying, e.g. insecticides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/0009—Special features
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
    • F04B43/04—Pumps having electric drive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/22—Arrangements for enabling ready assembly or disassembly

Definitions

  • This application relates to the technical field of diaphragm pumps.
  • diaphragm pumps Due to its good corrosion resistance, diaphragm pumps have been widely used in the plant protection industry in recent years.
  • the diaphragm pump when the diaphragm pump is working, its diaphragm needs to reciprocate, which causes the diaphragm to always bear alternating stress and is easily damaged, causing the diaphragm pump to fail to work normally.
  • the diaphragm of the existing diaphragm pump has a complicated shape, and it is difficult to remove the diaphragm after damage, so it is inconvenient to maintain it.
  • diaphragm pumps will come into contact with various media and require high corrosion resistance of the diaphragm.
  • the existing pure rubber diaphragms can only withstand specific types of media. The corrosion resistance range needs to be improved, and there will be problems when pumping pesticides.
  • a diaphragm pump comprising: a pump body; a pump cover arranged on the pump body; and a diaphragm located between the pump body and the pump cover, the diaphragm and the pump cover jointly forming a diaphragm cavity,
  • the diaphragm cavity is provided with a liquid inlet and a liquid outlet;
  • the diaphragm includes a diaphragm body, a first fastener, and a fluororesin protective layer;
  • the first fastener is fixed to the middle of the diaphragm body Connection, used for the connection between the diaphragm body and the pump body;
  • the fluororesin protective layer is arranged on the side of the diaphragm body close to the diaphragm cavity; it can be driven by the first fastener
  • the diaphragm body is deformed to change the size of the diaphragm cavity, so that the diaphragm discharges the liquid in the diaphragm cavity from the liquid
  • a spraying system includes: the above-mentioned diaphragm pump; and a spray head, which is connected with the diaphragm pump through a pipeline; wherein the diaphragm pump pumps liquid to the spray head and sprays it out through the spray head.
  • An agricultural plant protection drone comprising: a frame; the above-mentioned spraying system, which is installed on the frame; and a water tank, which is installed on the frame and communicated with the diaphragm pump through a pipe; wherein, The diaphragm pump pumps the liquid in the water tank to the spray head.
  • the diaphragm body is connected to the pump body through the first fastener. Because the first fastener has the advantage of convenient disassembly, the diaphragm is damaged. The diaphragm body can be easily detached from the pump body, which is convenient for maintenance or replacement of the diaphragm.
  • the fluorine-containing resin protective layer is in contact with the medium in the diaphragm cavity. Because the fluorine-containing resin protective layer has good corrosion resistance, it can withstand almost all solutions. The setting improves the corrosion resistance range of the diaphragm, extends the service life of the diaphragm, reduces the cost of the diaphragm, and expands the application place of the diaphragm pump.
  • FIG. 1 is a schematic structural diagram of a diaphragm according to an embodiment of the present application from a first view angle;
  • Fig. 2 is a schematic view of the structure of the diaphragm shown in Fig. 1 from a second perspective;
  • Fig. 3 is a schematic structural diagram of the diaphragm shown in Fig. 1 from a third perspective;
  • FIG. 4 is a schematic cross-sectional structure diagram of the diaphragm shown in FIG. 1;
  • Figure 5 is a schematic structural diagram of a diaphragm pump according to an embodiment of the present application.
  • Figure 6 is a schematic diagram of the first exploded structure of the diaphragm pump described in Figure 5;
  • FIG. 7 is a schematic diagram of a second exploded structure of the diaphragm pump described in FIG. 5;
  • Figure 8 is a schematic diagram of a third exploded structure of the diaphragm pump described in Figure 5;
  • FIG. 9 is a schematic structural diagram of the diaphragm pump according to an embodiment of the present application.
  • Fig. 10 is a schematic sectional view of the diaphragm pump shown in Fig. 9 in one direction;
  • FIG. 11 is a schematic cross-sectional view of the diaphragm pump shown in FIG. 9 in another direction;
  • Figure 12 is a schematic structural diagram of a diaphragm pump according to an embodiment of the present application.
  • Fig. 13 is an exploded structural diagram of the diaphragm pump shown in Fig. 12;
  • Figure 14 is a schematic sectional view of the diaphragm pump shown in Figure 12;
  • Figure 15 is a schematic structural diagram of an agricultural plant protection drone using a diaphragm pump.
  • a diaphragm pump 2 provided according to some embodiments of the present application includes a pump body 21, a pump cover 22 and a diaphragm 1.
  • the pump cover 22 is provided on the pump body 21.
  • the diaphragm 1 is located between the pump body 21 and the pump cover 22.
  • the diaphragm 1 and the pump cover 22 together form a diaphragm cavity 27.
  • the diaphragm cavity 27 is provided with a liquid inlet and a liquid outlet.
  • the diaphragm 1 includes a diaphragm body 11 and a first fastener 12.
  • the first fastener 12 is fixedly connected to the middle of the diaphragm body 11 and is used for the connection between the diaphragm body 11 and the pump body 21. Connection;
  • the first fastener 12 can drive the diaphragm body 11 to deform to change the size of the diaphragm cavity 27, so that the diaphragm 1 discharges the liquid in the diaphragm cavity 27 from the liquid outlet or sucks in liquid from the liquid inlet.
  • the diaphragm pump 2 is not only complicated to disassemble the pump cover 22, but also the fixing method of the diaphragm 1 is generally a double snap type. Even if the pump cover 22 is opened, it is troublesome to disassemble the diaphragm 1.
  • the first fastener 12 is used to realize the connection between the diaphragm body 11 and the pump body 21. Since the first fastener 12 is easy to disassemble and install, the first fastener 12 is removed from the pump body 21.
  • the diaphragm 1 can be separated from the pump body 21, so that the diaphragm 1 can be easily removed from the pump body 21, and can also be easily installed back to the pump body 21, so that the diaphragm 1 can be conveniently replaced or repaired.
  • the first fastener 12 may be, but is not limited to, a screw or a bolt.
  • the side of the diaphragm body 11 away from the diaphragm cavity 27 is provided with a mounting hole 115 with one end open.
  • the mounting hole 115 is a blind hole.
  • the head 121 of the first fastener 12 is inserted into the mounting hole from the open end of the mounting hole 115.
  • 115 is confined in the mounting hole 115.
  • the first fastener 12 includes a head 121 and a threaded portion 122 connected with the head 121.
  • the threaded portion 122 is provided with external threads for connecting with the pump body 21.
  • the shape and size of the mounting hole 115 are respectively adapted to the shape and size of the head 121 of the first fastener 12, and the head 121 of the first fastener 12 is limited in the mounting hole 115, realizing the first fastening Fixation between the piece 12 and the diaphragm body 11.
  • the head 121 of the first fastener 12 and the mounting hole 115 are interference fit.
  • the mounting hole 115 is a blind hole, that is, the mounting hole 115 does not penetrate the diaphragm body 11 or the diaphragm 1.
  • the mounting hole 115 in this application has a blind hole structure, so that the first The fastener 12 does not affect the integrity of the diaphragm 1 and thus does not affect the sealing performance of the diaphragm 1 to the diaphragm cavity 27.
  • the head 121 of the first fastener 12 and the diaphragm body 11 are bonded.
  • the pump body 21 includes a driving mechanism and a transmission mechanism.
  • the driving mechanism can drive the transmission mechanism to move.
  • the transmission mechanism and the diaphragm body 11 are connected by a first fastener 12 to drive the diaphragm 1 to reciprocate under the action of the driving mechanism.
  • the diaphragm cavity 27 has a liquid inlet and a liquid outlet.
  • the pump body 21 is provided with a first valve communicating with the liquid inlet.
  • the first valve is used to control the flow of liquid into the diaphragm cavity 27.
  • the pump body 21 is also provided with a The second valve connected with the liquid port is used to control the liquid to flow out of the diaphragm cavity 27.
  • the liquid inlet is connected with the liquid inlet pipe
  • the liquid outlet is connected with the liquid outlet pipe
  • the first valve is arranged on the liquid inlet pipe and used to control the on and off of the liquid inlet pipe
  • the second valve is arranged on the liquid outlet pipe and used for control On and off of the outlet pipe.
  • the first valve and the second valve may be but not limited to the one-way valve 26.
  • the one-way valve 26 includes a valve core 262 and a reset member connected with the valve core 262, and the reset member may be a reset spring 261.
  • the reset member is supported between the valve core 262 and the pump body 22.
  • the valve core 262 moves toward the valve port under the action of the reset member.
  • the valve port is closed again, the one-way valve 26 is closed, and the liquid cannot pass through the one-way valve 26.
  • the one-way valve includes a base 263, the valve core 262 and the reset member are arranged on the base 263, and the base 263 is arranged on the pump body 21.
  • the pump body 21 includes a casing.
  • the transmission mechanism is located in the casing.
  • the driving mechanism can be a motor 23.
  • the motor 23 is fixed on the casing.
  • the drive shaft of the motor 23 extends into the casing and is connected to the transmission mechanism.
  • the drive shaft is fixed to the transmission mechanism. connection.
  • the transmission mechanism is connected to the diaphragm body 11 through the first fastener 12 to realize the connection between the pump body 21 and the diaphragm body 11.
  • the first fastener 12 is removed from the diaphragm body 11 to realize the separation of the diaphragm body 11 and the transmission mechanism, thereby realizing the separation of the diaphragm 1 and the pump body 21 to replace or maintain the diaphragm 1.
  • the motor 23 drives the transmission mechanism through the drive shaft, and the transmission mechanism drives the diaphragm body 11 to reciprocate.
  • the diaphragm 1 applies pressure at intervals to change the volume of the diaphragm cavity 27.
  • the volume of the diaphragm cavity 27 increases, the liquid flows into the diaphragm cavity 27 through the first valve; when the volume of the diaphragm cavity 27 decreases, the liquid flows out of the diaphragm cavity 27 through the second valve, realizing the pumping process.
  • the first fastener 12 is located in the middle of the diaphragm body 11, and when the transmission mechanism drives the diaphragm body 11 to reciprocate, the diaphragm body 11 can deform evenly everywhere.
  • the transmission mechanism includes a crank connecting rod mechanism.
  • the crank connecting rod mechanism includes a crankshaft and a connecting rod that are rotatably connected.
  • the crankshaft is connected to the driving mechanism, and the connecting rod is connected to the diaphragm body 11. It is connected by the first fastener 12.
  • the crank connecting rod mechanism is a plane connecting rod mechanism that can realize the mutual conversion between rotation and movement, and usually includes a rotating crankshaft and a moving connecting rod.
  • the rotational movement of the crankshaft can be converted into the reciprocating movement of the connecting rod, or the reciprocating movement of the connecting rod can be converted into the rotational movement of the crankshaft.
  • the crankshaft and the connecting rod of the crank connecting rod mechanism are respectively connected with the drive shaft of the motor 23 and the diaphragm 1.
  • the drive shaft of the motor 23 can drive the crankshaft to rotate, the crankshaft can drive the connecting rod to reciprocate, and then the connecting rod can drive the diaphragm 1 to reciprocate.
  • crank connecting rod structure is not particularly limited in this embodiment, and any existing implementation of the crank connecting rod structure can be used, as long as the crank connecting rod structure can drive the diaphragm 1 to reciprocate. .
  • the transmission mechanism includes a rack-and-pinion swing mechanism
  • the rack-and-pinion swing mechanism includes meshing gears and racks
  • the gears are connected to the driving mechanism
  • the rack and the diaphragm body 11 pass through the first tightening mechanism.
  • Firmware 12 is connected.
  • the rack and pinion swing mechanism may include a gear and a rack, and the gear is connected to the drive shaft.
  • the drive shaft is used to drive the gear to rotate, and the gear is used to drive the rack to reciprocate.
  • the rack-and-pinion swing mechanism is also called a rack-and-pinion mechanism, a rack-and-pinion transmission mechanism, etc. It usually includes a gear and a rack, which can convert the rotational motion of the gear into a reciprocating linear motion of the rack, or change the rack The reciprocating linear motion is transformed into the rotary motion of the gear.
  • the gear is connected to the drive shaft of the motor 23.
  • the drive shaft can drive the gear to rotate, and the gear can drive the rack to reciprocate.
  • the gear can drive the diaphragm 1 to reciprocate.
  • the implementation of the rack and pinion swing mechanism is not particularly limited in this embodiment, and any existing rack and pinion swing mechanism can be used, as long as the rack and pinion swing mechanism can drive the diaphragm 1 to reciprocate. .
  • the transmission mechanism includes an eccentric wheel and a bracket, the eccentric wheel is connected to the driving mechanism, the bracket abuts the outer contour of the eccentric wheel, and the bracket and the diaphragm body 11 are connected to each other through the first fastener 12 connection.
  • the eccentric wheel has a curved profile, the eccentric wheel can be sleeved on the drive shaft of the motor 23, and the drive shaft can drive the eccentric wheel to rotate.
  • the protruding end of the eccentric moves toward the diaphragm 1, the protruding end abuts against the stent and squeezes the stent, so that the diaphragm 1 is elastically deformed and the size of the diaphragm cavity 27 becomes smaller.
  • the protruding end of the eccentric is far away from the diaphragm 1, the diaphragm 1 rebounds and returns to a shape without elastic deformation, and the size of the diaphragm cavity 27 becomes larger.
  • the diaphragm 1 further includes a fluorine-containing resin protective layer 13, which is disposed on the side of the diaphragm body 11 close to the diaphragm cavity 27.
  • the fluorine-containing resin protective layer 13 is provided on the upper side of the diaphragm body 11.
  • the fluororesin protective layer 13 When the diaphragm pump 2 is working, the fluororesin protective layer 13 is in contact with the medium in the diaphragm cavity 27.
  • the fluororesin protective layer 13 has good corrosion resistance and can withstand almost all solutions. Therefore, the fluororesin protective layer 13
  • the setting increases the corrosion resistance range of the diaphragm 1, extends the service life of the diaphragm 1 and reduces the cost of the diaphragm 1, while expanding the application places of the diaphragm pump 2.
  • the diaphragm 1 can be provided with a fluororesin protective layer 13
  • the diaphragm pump 2 can be used as a plant protection diaphragm pump and applied to agricultural drones and pesticide sprayers.
  • Fluorine-containing resin is a type of thermoplastic resin containing fluorine atoms in the molecule, which has excellent high and low temperature resistance, dielectric properties, chemical stability and weather resistance.
  • the fluorine-containing resin may be, but is not limited to, polytetrafluoroethylene (PTFE), polychlorotrifluoroethylene (PCTFE), polyvinylidene fluoride (PVDF).
  • the fluorine-containing resin protective layer 13 is fixedly connected to the diaphragm body 11, for example, the two are bonded, clamped or connected by fasteners.
  • the fluorine-containing resin protective layer 13 includes a PTFE (polytetrafluoroethylene) film.
  • PTFE has the characteristics of resistance to acid, alkali, and various organic solvents, and is almost insoluble in all solvents, thereby effectively improving the corrosion resistance of the diaphragm 1.
  • the diaphragm body 11 can be, but not limited to, rubber material or metal material.
  • the diaphragm pump 2 When the diaphragm pump 2 is working, it needs to overcome the deformation of the diaphragm 1 all the time, causing additional loss and reducing efficiency. This requires that the diaphragm 1 should not be too thick. However, the diaphragm 1 needs to isolate the diaphragm cavity 27 from the transmission mechanism, and its sealing reliability requirements are also high, so the compression of the diaphragm 1 needs to be large enough, that is, the thickness of the diaphragm 1 should be large, so the flexibility and sealing of the diaphragm 1 There is a contradiction in the thickness of the requirements, that is, it is difficult for the diaphragm 1 with uniform thickness to meet the requirements for flexibility and sealing at the same time.
  • the diaphragm body 11 includes a working area 111 and a sealing area 112.
  • the working area 111 and the sealing area 112 are arranged in sequence, and the thickness of the working area 111 is smaller than that of the sealing area 112. Thickness, where the direction close to the center of the diaphragm body is inside, and the direction away from the center of the diaphragm body is outside.
  • the diaphragm body 11 is designed to have a non-uniform thickness to take into account both flexibility and sealing.
  • the working area 111 needs to be deformed.
  • the driving mechanism drives the working area 111 to reciprocate through the transmission mechanism to deform the working area 111 and change the volume of the diaphragm cavity 27.
  • the sealing area 112 has a sealing requirement.
  • the sealing area 112 and the pump cover 22 are connected in a sealed manner to ensure the sealing performance of the diaphragm cavity 27 and realize the isolation between the diaphragm cavity 27 and the transmission mechanism.
  • the thickness of the working area 111 is small, which reduces the additional loss of the driving mechanism caused by overcoming the deformation of the diaphragm 1, thereby improving the efficiency of the driving mechanism.
  • the thickness of the sealing area 112 is relatively large, so that the sealing area 112 can generate a relatively large amount of compression, and a good seal between the sealing area 112 and the pump cover 22 is achieved.
  • the thickness of the working area 111 ranges from 1mm to 2mm, avoiding the thickness of the working area 111 being less than 1mm, resulting in the thickness of the working area 111 being too small, affecting the strength and service life of the working area 111, and avoiding the thickness of the working area 111 If the thickness is greater than 2 mm, the thickness of the working area 111 is too large, and the additional loss caused by the deformation of the diaphragm 1 is large.
  • the thickness of the working area 111 may be, but is not limited to, 1 mm, 1.5 mm, or 2 mm.
  • the working area 111 extends along the circumferential direction of the diaphragm body 11 and has a ring shape.
  • the first fastener 12 is located inside the working area 111, and the transmission mechanism is connected with the first fastener 12, so that the driving mechanism drives the diaphragm body 11 to reciprocate through the transmission mechanism and the first fastener 12.
  • the working area 111 is annular, so that when the diaphragm body 11 reciprocates, the deformation capacity and the deformation amount of the working area 111 are uniform.
  • the thickness of the sealing area 112 is greater than or equal to 2 mm to avoid that the thickness of the sealing area 112 is too small, resulting in the sealing area 112 being unable to provide sufficient compression and affecting the seal between the diaphragm 1 and the pump cover 22.
  • sealing area 112 extends along the circumferential direction of the diaphragm body 11 and has a ring shape.
  • the sealing area 112 is sleeved on the outside of the working area 111, the sealing area 112 is ring-shaped, and the sealing area 112 is matched with the pump cover 22 in its entire circle to realize the circumferential seal of the diaphragm cavity 27.
  • a side of the working area 111 away from the fluororesin protective layer 13 (the lower side of the working area 111 in FIG. 4) is provided with a groove 116 to make the thickness of the working area 111 smaller than the thickness of the sealing area 112.
  • Disposing the groove 116 on the side away from the fluororesin protective layer 13 not only achieves the purpose of the thickness of the working area 111 being smaller than the thickness of the sealing area 112, but also enables the working area 111 to face the diaphragm cavity 27, that is, the fluororesin is provided
  • the surface of the protective layer 13 (the upper surface in FIG. 4) is flat, which facilitates the arrangement of the fluorine-containing resin protective layer 13 and increases the bonding area between the fluorine-containing resin protective layer 13 and the working area 111.
  • the groove 116 extends in the circumferential direction of the diaphragm body 11 in an annular shape, so that the working area 111 has an annular shape.
  • the working area 111 is provided with a boss portion 114 on the side facing away from the fluororesin protective layer 13.
  • the groove 116 is located on the outside of the boss portion 114 and has a ring shape extending along the circumferential direction of the boss portion 114.
  • the head 121 of the fastener 12 is embedded in the boss portion 114.
  • the boss portion 114 is located inside the annular groove 116, and the first fastener 12 is installed on the boss portion 114 so that the first fastener 12 can be located in the middle of the diaphragm body 11.
  • the boss portion 114 protrudes from the surface of the working area 111 away from the fluororesin protective layer 13, as shown in FIG. 4, the boss portion 114 protrudes downward from the lower surface of the working area 111, so that the thickness of the boss portion 114 is greater than the working area
  • the thickness of 111 facilitates the installation of the first fastener 12 on the boss portion 114.
  • the thickness of the boss portion 114 is large, which can enhance the strength of the boss portion 114. After the first fastener 12 is installed on the boss portion 114, the strength of the boss portion 114 can still meet the requirements of use.
  • the thickness of the boss portion 114 is greater than or equal to 1 mm.
  • the thickness of the boss portion 114 is less than 1mm, which affects the installation of the first fastener 12 on the boss portion 114 on the one hand, and on the other hand causes the first fastener 12 to be installed on the boss portion 114 after the boss portion 114
  • the strength is too small to meet the requirements of the diaphragm 1.
  • one of the side of the diaphragm body 11 facing away from the diaphragm cavity 27 and the pump body 21 is provided with a positioning rib 113, and the other is provided with a positioning groove corresponding to the positioning rib 113, and the positioning rib 113 is opposite to the positioning groove.
  • the fit is used for the positioning between the diaphragm body 11 and the pump body 21.
  • a positioning rib is provided on the lower surface of the diaphragm body, and a positioning groove is provided on the upper surface of the pump body.
  • the positioning mechanism includes a positioning rib 113 and a positioning groove.
  • the positioning rib 113 corresponds to the positioning groove. Further, the positioning rib 113 is matched with the positioning groove, and the positioning rib 113 is inserted into the positioning groove to realize the positioning between the diaphragm body 11 and the pump body 21.
  • the positioning rib 113 is provided on the side of the diaphragm body 11 away from the diaphragm cavity 27, and the positioning groove is provided on the surface of the pump body 21 facing the diaphragm body 11.
  • the side of the diaphragm body 11 away from the diaphragm cavity 27 extends in the direction of the pump body 21 to form positioning ribs 113.
  • the positioning ribs 113 may be ring-shaped arranged along the circumference of the diaphragm body 11, or the number of positioning ribs 113 is multiple.
  • the positioning ribs 113 are arranged at intervals along the circumferential direction of the diaphragm body 11.
  • the positioning rib 113 is arranged on the edge of the diaphragm body 11.
  • the outer edge of the diaphragm body 11 extends downward to form an annular positioning rib 113.
  • the positioning groove is annular.
  • Example 2 The positioning groove is provided on the side of the diaphragm body 11 away from the diaphragm cavity 27, and the positioning rib 113 is provided on the surface of the pump body 21 facing the diaphragm body 11.
  • the side of the diaphragm body 11 away from the diaphragm cavity 27 is recessed to form a positioning groove, and the pump body 21 extends toward the surface of the diaphragm body 11 in the direction of the pump body 21 to form a positioning rib 113.
  • the positioning ribs 113 may be arranged along the circumferential direction of the diaphragm body 11. Ring shape, or, the number of positioning ribs 113 is multiple and the multiple positioning ribs 113 are arranged at intervals along the circumferential direction of the diaphragm body 11.
  • the positioning groove is annular. In order that the positioning groove does not affect the size of the working area 111 on the diaphragm body 11, the positioning groove is provided on the edge of the diaphragm body 11.
  • the diaphragm body 11 is circular, and the head 121 of the first fastener 12 is fixed to the middle of the diaphragm body 11.
  • the diaphragm body 11 is circular, and the first fastener 12 is located in the middle of the diaphragm body 11, and further, the first fastener 12 is located in the center of the diaphragm body 11.
  • the positioning ribs 113 can always be located in the positioning groove to prevent the diaphragm body 11 from rotating with the first fastener 12 relative to the pump body 21
  • the positioning rib 113 interferes with the positioning groove, thereby ensuring the positioning accuracy between the diaphragm body 11 and the pump body 21 and preventing the position deviation between the diaphragm body 11 and the pump body 21.
  • pump body 21 and the pump cover 22 are connected by a second fastener 25, which facilitates the disassembly between the pump body 21 and the pump cover 22, and further facilitates the replacement or maintenance of the diaphragm 1.
  • the second fastener 25 can be, but is not limited to, a screw or a bolt.
  • the pump cover 22 is provided with a plurality of first screw holes 221 distributed at intervals, and the pump body 21 is provided with second screw holes 211 corresponding to the plurality of first screw holes 221 one-to-one.
  • the member 25 passes through the first screw hole 221 and the second screw hole 211 to realize the connection between the pump body 21 and the pump cover 22.
  • pump body 21 and the pump cover 22 can also be snapped together.
  • the diaphragm pump 2 provided by the embodiment of the present application, (1) the present application uses a circular diaphragm 1 with a simple shape, and the first fastener 12 is embedded on the back of the diaphragm 1. The first fastener 12 is connected to the pump The bodies 21 are connected to realize the installation of the diaphragm 1 on the pump body 21 and facilitate the disassembly of the diaphragm 1.
  • a PTFE film is pasted on the front of the diaphragm 1, and the PTFE film is in contact with the medium (a body in the diaphragm cavity 27), which has good corrosion resistance.
  • the circular diaphragm 1 is designed to have a non-uniform thickness to improve efficiency and sealing reliability.
  • this application also provides an agricultural plant protection drone using the above diaphragm pump.
  • the agricultural plant protection drone 100 of the embodiment of the present application includes a frame 110, a spray system 120, and a water tank 130.
  • the spray system 120 is installed on the frame 110.
  • the frame 110 includes a central body 111 and a plurality of arms 112 extending from the central body 111. Specifically, in the illustrated embodiment, the plurality of arms 112 and the central body 111 are rotatably connected.
  • the spray system 120 includes a diaphragm pump 2 and a spray head 121.
  • the spray head 121 communicates with the diaphragm pump 2 through a pipe.
  • the water tank 130 is installed on the frame 110 and communicates with the diaphragm pump 2 through a pipe.
  • the diaphragm pump 2 pumps the liquid in the water tank 130 to the spray head 121.
  • connection can be a fixed connection, a detachable connection, or an integral connection, or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium.

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Abstract

一种隔膜泵，包括泵体（21）、泵盖（22）和隔膜（1）。泵盖（22）设置在泵体（21）上，隔膜（1）位于泵体（21）与泵盖（22）之间，隔膜（1）与泵盖（22）共同形成隔膜腔（27），隔膜腔（27）设有进液口以及出液口。隔膜（1）包括隔膜本体（11）及第一紧固件（12），第一紧固件（12）与隔膜本体（11）的中部固定连接，用于隔膜本体（11）与泵体（21）之间的连接；通过第一紧固件（12）能够带动隔膜本体（11）变形，以改变隔膜腔（27）的大小，使得隔膜（1）将隔膜腔（27）的液体从出液口排出，或从进液口吸入液体。采用第一紧固件（12）实现隔膜本体（11）与泵体（21）之间的连接，由于第一紧固件（12）方便拆卸与安装，将第一紧固件（12）从泵体（21）上拆卸下来，可以实现隔膜（1）与泵体（21）的分离，从而能够将隔膜（1）能够容易的从泵体（21）上拆下，也能方便的安装回泵体（21），进而可以方便的对隔膜（1）进行更换或维修。

Description

隔膜泵 技术领域
本申请涉及隔膜泵技术领域。
背景技术
由于隔膜泵的良好耐腐蚀性，近年来被广泛应用于植保行业。
现有技术中，一方面，隔膜泵工作时，其隔膜需要往复运动，导致隔膜一直承受交变应力，很容易破损，造成隔膜泵无法正常工作。而现有隔膜泵的隔膜形状复杂，损坏之后，很难将隔膜拆下，因此不方便对其进行维护。
另一方面，隔膜泵会接触各种介质，对隔膜的耐腐蚀要求较高，现有的纯橡胶隔膜只能耐受特定类别的介质，耐腐蚀范围有待提高，在泵农药时会有问题。
发明内容
有鉴于此，有必要提供一种能解决上述技术问题至少之一的隔膜泵。
一种隔膜泵，包括：泵体；泵盖，设置在所述泵体上；和隔膜，位于所述泵体与所述泵盖之间，所述隔膜与所述泵盖共同形成隔膜腔，所述隔膜腔设有进液口以及出液口；其中，所述隔膜包括隔膜本体、第一紧固件以及含氟树脂保护层；所述第一紧固件与所述隔膜本体的中部固定连接，用于所述隔膜本体与所述泵体之间的连接；所述含氟树脂保护层设置在所述隔膜本体靠近所述隔膜腔的一侧；通过所述第一紧固件能够带动所述隔膜本体变形，以改变所述隔膜腔的大小，使得所述隔膜将所述隔膜腔的液体从所述出液口排出，或从所述进液口吸入液体。
一种喷洒系统，包括：上述的隔膜泵；以及喷头，通过管道与所述隔膜泵 相连通；其中，所述隔膜泵将液体泵取至所述喷头，并通过所述喷头喷洒出去。
一种农业植保无人机，包括：机架；上述的喷洒系统，安装在所述机架上；以及水箱，安装在所述机架上，并且通过管道与所述隔膜泵相连通；其中，所述隔膜泵将所述水箱内的液体泵取至所述喷头。
与现有技术相比，本申请具有以下有益的技术效果：一方面，隔膜本体通过第一紧固件连接在泵体上，由于第一紧固件具有方便拆卸的优点，从而在隔膜出现损坏时，可以方便的将隔膜本体从泵体上的拆下，方便对隔膜进行维护或更换。另一方面，隔膜泵工作时，含氟树脂保护层与隔膜腔的介质接触，由于含氟树脂保护层具有良好的耐腐蚀性能，几乎可以耐受所有的溶液，因此，含氟树脂保护层的设置提高了隔膜耐腐蚀的范围，在延长隔膜使用寿命，降低隔膜使用成本的同时，扩大了隔膜泵的适用场所。
本申请的附加方面和优点将在下面的描述部分中变得明显，或通过本申请的实践了解到。
附图说明
本申请的上述和/或附加的方面和优点从结合下面附图对实施例的描述中将变得明显和容易理解，其中：
图1是本申请的一个实施例所述的隔膜第一个视角的结构示意图；
图2是图1所示的隔膜第二个视角的结构示意图；
图3是图1所示的隔膜第三个视角的结构示意图；
图4是图1所示的隔膜的剖视结构示意图；
图5是本申请的一个实施例所述的隔膜泵的结构示意图；
图6是图5所述的隔膜泵的第一种分解结构示意图；
图7是图5所述的隔膜泵的第二种分解结构示意图；
图8是图5所述的隔膜泵的第三种分解结构示意图；
图9是本申请的一个实施例所述的隔膜泵的结构示意图；
图10是图9所示的隔膜泵一个方向的剖视结构示意图；
图11是图9所示的隔膜泵另一个方向的剖视结构示意图；
图12是本申请的一个实施例所述的隔膜泵的结构示意图；
图13是图12所示的隔膜泵的分解结构示意图；
图14是图12所示的隔膜泵的剖视结构示意图；
图15是应用隔膜泵的农业植保无人机的结构示意图。
其中，图1至图15中附图标记与部件名称之间的对应关系为：
1隔膜，11隔膜本体，111工作区域，112密封区域，113定位筋，114凸台部，115安装孔，116凹槽，12第一紧固件，121头部，122螺纹部，13含氟树脂保护层，2隔膜泵，21泵体，211第二螺钉孔，22泵盖，221第一螺钉孔，23电机，231驱动轴，25第二紧固件，26单向阀，261复位弹簧，262阀芯，263底座，27隔膜腔。
具体实施方式
为了能够更清楚地理解本申请的上述目的、特征和优点，下面结合附图和具体实施方式对本申请进行进一步的详细描述。需要说明的是，在不冲突的情况下，本申请的实施例及实施例中的特征可以相互组合。
在下面的描述中阐述了很多具体细节以便于充分理解本申请，但是，本申请还可以采用其他不同于在此描述的方式来实施，因此，本申请的保护范围并不受下面公开的具体实施例的限制。
下面参照附图1至15描述根据本申请一些实施例的隔膜泵2。
如图5至图8所示，根据本申请一些实施例提供的一种隔膜泵2，包括泵体21、泵盖22和隔膜1。
泵盖22设置在泵体21上。隔膜1位于泵体21与泵盖22之间，隔膜1与泵盖22共同形成隔膜腔27，隔膜腔27设有进液口以及出液口。
如图1至图4所示，隔膜1包括隔膜本体11及第一紧固件12，第一紧固件12与隔膜本体11的中部固定连接，用于隔膜本体11与泵体21之间的连接；通过第一紧固件12能够带动隔膜本体11变形，以改变隔膜腔27的大小，使得隔膜1将隔膜腔27的液体从出液口排出，或从进液口吸入液体。
现有技术中，隔膜泵2不仅泵盖22的拆卸方式复杂，隔膜1的固定方式一般为双卡扣式，即使将泵盖22打开，拆卸隔膜1也比较麻烦。本申请中采用第一紧固件12实现隔膜本体11与泵体21之间的连接，由于第一紧固件12 方便拆卸与安装，将第一紧固件12从泵体21上拆卸下来，可以实现隔膜1与泵体21的分离，从而能够将隔膜1能够容易的从泵体21上拆下，也能方便的安装回泵体21，进而可以方便的对隔膜1进行更换或维修。第一紧固件12可以为但不限于螺钉或螺栓。
进一步地，隔膜本体11上背离隔膜腔27的一侧设有一端开口的安装孔115，安装孔115为盲孔，第一紧固件12的头部121自安装孔115的开口端插入安装孔115并限位于安装孔115内。
第一紧固件12包括头部121和与头部121连接的螺纹部122，螺纹部122上设有外螺纹，用于与泵体21相连接。安装孔115的形状和尺寸分别与第一紧固件12的头部121的形状和尺寸相适配，第一紧固件12的头部121限位于安装孔115内，实现了第一紧固件12与隔膜本体11之间的固定。示例性的，第一紧固件12的头部121与安装孔115过盈配合。
安装孔115为盲孔，即安装孔115未贯穿隔膜本体11或隔膜1，相比于安装孔115为贯穿隔膜本体11的通孔，本申请中安装孔115为盲孔的结构，使得第一紧固件12不影响隔膜1的完整性，从而不影响隔膜1对隔膜腔27的密封性。
为进一步增强第一紧固件12与隔膜本体11的连接强度，第一紧固件12的头部121与隔膜本体11之间相粘结。
进一步地，泵体21包括驱动机构和传动机构，驱动机构能够带动传动机构运动，传动机构与隔膜本体11通过第一紧固件12相连接，以在驱动机构的作用下带动隔膜1往复运动。
隔膜腔27具有进液口及出液口，泵体21上设有与进液口相连通的第一阀门，第一阀门用于控制液体流入隔膜腔27，泵体21上还设有与出液口相连通的第二阀门，第二阀门用于控制液体流出隔膜腔27。例如进液口上连接有进液管，出液口上连接有出液管，第一阀门设置在进液管上并用于控制进液管的通断，第二阀门设置在出液管上并用于控制出液管的通断。第一阀门和第二阀门可以为但不限于单向阀26。如图7所示，单向阀26包括阀芯262和与阀芯262相连接的复位件，复位件可以为复位弹簧261。复位件支撑在阀芯262和泵体22之间，当阀芯262背离复位件一侧的液体压力大于第一预设压力时， 液体带动阀芯262朝向复位件运动，复位件被压缩，阀芯262将阀口打开，单向阀26导通，液体能够通过单向阀26，当液体压力减小至第二预设压力时，在复位件的作用下，阀芯262朝向阀口运动，重新将阀口关闭，单向阀26关闭，液体无法通过单向阀26。进一步地，单向阀包括底座263，阀芯262和复位件设置在底座263上，底座263设置在泵体21上。
泵体21包括外壳，传动机构位于外壳内，驱动机构可以为电机23，电机23固定在外壳上，电机23的驱动轴伸入外壳内，并与传动机构相连接，例如驱动轴与传动机构固定连接。传动机构通过第一紧固件12与隔膜本体11相连接，从而实现泵体21与隔膜本体11之间的连接。将第一紧固件12从隔膜本体11上拆下，可以实现隔膜本体11与传动机构的分离，从而实现隔膜1与泵体21的分离，以对隔膜1进行更换或维护。
隔膜泵2工作时，电机23通过驱动轴带动传动机构运动，传动机构带动隔膜本体11往复运动，隔膜1间隔地施加压力，使得隔膜腔27的容积发生变化。当隔膜腔27的容积变大时，液体通过第一阀门流入至隔膜腔27中；当隔膜腔27的容积变小时，液体通过第二阀门流出隔膜腔27，实现了泵水的流程。
第一紧固件12位于隔膜本体11的中部，传动机构在带动隔膜本体11往复运动时，能够使得隔膜本体11各处变形均匀。
至于传动机构的形式，在第一个具体的实施例中，传动机构包括曲柄连杆机构，曲柄连杆机构包括转动连接地曲轴和连杆，曲轴与驱动机构相连接，连杆与隔膜本体11通过第一紧固件12相连接。
曲柄连杆机构是可以实现转动和移动相互转换的平面连杆机构，通常包括进行转动的曲轴和进行移动的连杆。曲轴的旋转运动可以转换为连杆的往复运动，或者连杆的往复运动可以转换为曲轴的旋转运动。在本实施例中，曲柄连杆机构的曲轴和连杆分别与电机23的驱动轴和隔膜1连接。电机23的驱动轴可以带动曲轴转动，曲轴可以带动连杆往复运动，进而连杆可以带动隔膜1往复运动。
需要说明的是，本实施例对于曲柄连杆结构的实现方式不做特别限定，可以采用现有的任意一种曲柄连杆结构的实现方式，只要曲柄连杆结构可以带动隔膜1往复运动即可。
在第二个具体的实施例中，传动机构包括齿轮齿条摆动机构，齿轮齿条摆动机构包括相啮合的齿轮和齿条，齿轮与驱动机构相连接，齿条与隔膜本体11通过第一紧固件12相连接。
齿轮齿条摆动机构可以包括齿轮和齿条，齿轮与驱动轴连接。驱动轴用于带动齿轮转动，齿轮用于带动齿条往复运动。
具体的，齿轮齿条摆动机构也称为齿轮齿条机构、齿轮齿条传动机构等，通常包括齿轮和齿条，可以将齿轮的回转运动转变为齿条的往复直线运动，或者将齿条的往复直线运动转变为齿轮的回转运动。在本实施例中，齿轮与电机23的驱动轴连接。驱动轴可以带动齿轮转动，齿轮可以带动齿条往复运动。进而齿轮可以带动隔膜1往复运动。
需要说明的是，本实施例对于齿轮齿条摆动机构的实现方式不做特别限定，可以采用现有的任意一种齿轮齿条摆动机构，只要齿轮齿条摆动机构可以带动隔膜1往复运动即可。
在第三个具体的实施例中，传动机构包括偏心轮和支架，偏心轮与驱动机构相连接，支架与偏心轮的外轮廓相抵接，且支架与隔膜本体11通过第一紧固件12相连接。
偏心轮具有曲线轮廓，偏心轮可以套设在电机23的驱动轴上，驱动轴可以带动偏心轮转动。当偏心轮的凸出端向隔膜1移动时，凸出端与支架相抵接并挤压支架，以使隔膜1发生弹性形变，隔膜腔27尺寸变小。当偏心轮的凸出端远离隔膜1时，隔膜1回弹恢复为没有发生弹性形变的形状，隔膜腔27的尺寸变大。
可选地，如图4所示，隔膜1还包括含氟树脂保护层13，含氟树脂保护层13设置在隔膜本体11靠近隔膜腔27的一侧，如图4中，含氟树脂保护层13设置在隔膜本体11的上侧。
隔膜泵2工作时，含氟树脂保护层13与隔膜腔27的介质接触，由于含氟树脂保护层13具有良好的耐腐蚀性能，几乎可以耐受所有的溶液，因此，含氟树脂保护层13的设置提高了隔膜1耐腐蚀的范围，在延长隔膜1使用寿命，降低隔膜1使用成本的同时，扩大了隔膜泵2的适用场所，例如可以将隔膜1上设有含氟树脂保护层13的隔膜泵2可以用作植保隔膜泵，应用到农业无人 机、农药喷洒机中。
含氟树脂是分子中含有氟原子的一类热塑性树脂，具有优异的耐高低温性能、介电性能、化学稳定性和耐候性。含氟树脂可以为但不限于聚四氟乙烯(PTFE)、聚三氟氯乙烯(PCTFE)、聚偏氟乙烯(PVDF)。
含氟树脂保护层13与隔膜本体11固定连接，例如两者相粘结、相卡接或通过紧固件相连接等。
进一步地，含氟树脂保护层13包括PTFE(聚四氟乙烯)薄膜。
PTFE具有抗酸抗碱、抗各种有机溶剂的特点，几乎不溶于所有的溶剂，从而有效提高隔膜1的耐腐蚀性。
隔膜本体11可以为但不限于橡胶材质或金属材质等。
隔膜泵2工作时需要一直克服隔膜1的变形，产生额外损耗，降低了效率，这要求隔膜1不能太厚。但是，隔膜1需要将隔膜腔27与传动机构隔离，其密封可靠性要求也较高，所以隔膜1的压缩量需要够大，也就是隔膜1的厚度要大，因此对隔膜1的柔性和密封的要求在厚度方面存在矛盾，即厚度均一的隔膜1很难同时满足对柔性和密封性的要求。
如图4所示，可选地，隔膜本体11包括工作区域111和密封区域112，沿由内向外的方向，工作区域111和密封区域112依次设置，且工作区域111的厚度小于密封区域112的厚度，其中，靠近隔膜本体中心的方向为内，远离隔膜本体的中心的方向为外。
根据柔性和密封的不同需求，将隔膜本体11设计为非均一厚度，以兼顾柔性和密封性。工作区域111有变形需求，隔膜泵2工作时，驱动机构通过传动机构带动工作区域111往复运动，以使工作区域111变形，改变隔膜腔27的容积。密封区域112具有密封需求，密封区域112与泵盖22之间密封连接，保证隔膜腔27的密封性，实现隔膜腔27与传动机构的隔离。
具体地工作区域111的厚度较小，减小了驱动机构因克服隔膜1变形而产生的额外损耗，从而提高了驱动机构的效率。密封区域112的厚度较大，使得密封区域112可以产生较大的压缩量，实现密封区域112与泵盖22之间的良好密封。
进一步地，工作区域111的厚度的范围为1mm～2mm，避免工作区域111 的厚度小于1mm，导致工作区域111的厚度过小，影响工作区域111的强度和使用寿命，同时避免工作区域111的厚度大于2mm，导致工作区域111厚度过大，从而导致克服隔膜1变形产生的额外损耗大。
工作区域111的厚度可以为但不限于1mm、1.5mm或2mm。
进一步地，工作区域111沿隔膜本体11的周向延伸并呈环形。
第一紧固件12位于工作区域111的内侧，传动机构与第一紧固件12相连接，从而驱动机构通过传动机构和第一紧固件12带动隔膜本体11往复运动。工作区域111呈环形，使得隔膜本体11往复运动时，工作区域111各处变形能力均匀、形变量均匀。
进一步地，密封区域112的厚度大于或等于2mm，避免密封区域112的厚度过小，导致密封区域112不能提供足够的压缩量，影响隔膜1与泵盖22之间的密封。
进一步地，密封区域112沿隔膜本体11的周向延伸并呈环形。
密封区域112套设在工作区域111的外侧，密封区域112呈环形，密封区域112整圈与泵盖22相配合，实现对隔膜腔27的周圈密封。
进一步地，工作区域111上背离含氟树脂保护层13的一侧(如图4中工作区域111的下侧)设有凹槽116，以使工作区域111的厚度小于密封区域112的厚度。
将凹槽116设置在背离含氟树脂保护层13的一侧，既实现了工作区域111的厚度小于密封区域112的厚度的目的，同时可以使得工作区域111上朝向隔膜腔27即设置含氟树脂保护层13的表面(如图4中上表面)平整，方便含氟树脂保护层13的设置，增大含氟树脂保护层13与工作区域111之间的贴合面积。
可选地，凹槽116沿隔膜本体11的周向延伸呈环形，使得工作区域111呈环形。
进一步地，工作区域111上背离含氟树脂保护层13的一侧设有凸台部114，凹槽116位于凸台部114的外侧并呈沿凸台部114的周向延伸的环形，第一紧固件12的头部121嵌入凸台部114内。
凸台部114位于环形凹槽116的内侧，第一紧固件12安装在凸台部114 上，使得第一紧固件12能够位于隔膜本体11的中部。凸台部114凸出工作区域111上背离含氟树脂保护层13的表面，如图4中，凸台部114向下凸出工作区域111的下表面，使得凸台部114的厚度大于工作区域111的厚度，方便第一紧固件12在凸台部114上的安装。且凸台部114的厚度较大，可以增强凸台部114的强度，第一紧固件12安装在凸台部114上后，凸台部114的强度仍能够满足使用要求。
进一步地，凸台部114的厚度大于或等于1mm。
凸台部114的厚度小于1mm，一方面影响第一紧固件12在凸台部114上的安装，另一方面导致第一紧固件12安装在凸台部114上后凸台部114的强度过小，不满足隔膜1的使用要求。
进一步地，隔膜本体11上背离隔膜腔27的一侧和泵体21中的一个上设有定位筋113，另一个上设有与定位筋113相对应的定位槽，定位筋113与定位槽相配合，用于隔膜本体11与泵体21之间的定位。如图4中，隔膜本体的下表面上设有定位筋，泵体的上表面上设有定位槽。
在将隔膜本体11安装在泵体21上时，为实现隔膜本体11与泵体21之间的定位，提高隔膜本体11在泵体21上的安装精度，在隔膜本体11和泵体21之间设有定位机构，定位机构包括定位筋113和定位槽。定位筋113与定位槽相对应，进一步地，定位筋113与定位槽相适配，定位筋113插入定位槽内，实现隔膜本体11与泵体21之间的定位。
示例性1，定位筋113设置在隔膜本体11背离隔膜腔27的一侧，定位槽设置在泵体21上朝向隔膜本体11的表面上。
隔膜本体11背离隔膜腔27的一侧向泵体21的方向延伸形成定位筋113，定位筋113可以是沿隔膜本体11的周向设置的环形，或者，定位筋113的数量为多个且多个定位筋113沿隔膜本体11的周向间隔设置。
为使得定位筋113不影响隔膜本体11上工作区域111的大小，定位筋113设置在隔膜本体11的边缘。例如如图中，隔膜本体11的外边缘向下延伸形成环形的定位筋113。定位槽呈环形。
示例性2，定位槽设置在隔膜本体11背离隔膜腔27的一侧，定位筋113设置在泵体21上朝向隔膜本体11的表面上。
隔膜本体11背离隔膜腔27的一侧凹陷形成定位槽，泵体21朝向隔膜本体11的表面向泵体21的方向延伸形成定位筋113，定位筋113可以是沿隔膜本体11的周向设置的环形，或者，定位筋113的数量为多个且多个定位筋113沿隔膜本体11的周向间隔设置。定位槽呈环形。为使得定位槽不影响隔膜本体11上工作区域111的大小，定位槽设置在隔膜本体11的边缘。
进一步地，隔膜本体11呈圆形，第一紧固件12的头部121固定在隔膜本体11的中部。
隔膜本体11呈圆形，且第一紧固件12位于隔膜本体11的中部，进一步地，第一紧固件12位于隔膜本体11的中心。第一紧固件12从泵体21上拧下来或拧到泵体21上时，定位筋113可以始终位于定位槽内，避免隔膜本体11随第一紧固件12相对于泵体21转动时定位筋113与定位槽出现干涉，从而保证隔膜本体11与泵体21之间的定位精度，防止隔膜本体11与泵体21之间出现位置偏差。
进一步地，泵体21与泵盖22之间通过第二紧固件25相连接，方便泵体21与泵盖22之间的拆下，进一步方便对隔膜1进行更换或维护。
第二紧固件25可以为但不限于螺钉或螺栓等。如图6中，泵盖22上设有多个间隔分布的第一螺钉孔221，泵体21上设有与多个第一螺钉孔221一一对应的第二螺钉孔211，第二紧固件25穿过第一螺钉孔221和第二螺钉孔211，实现泵体21与泵盖22之间的连接。
可以理解，泵体21与泵盖22之间还可以相卡接。
综上所述，本申请实施例提供的隔膜泵2，(1)本申请采用形状简单的圆形隔膜1，在隔膜1背面内嵌第一紧固件12，第一紧固件12与泵体21相连接，从而实现隔膜1在泵体21上的安装，且方便隔膜1的拆卸。(2)在隔膜1的正面黏贴PTFE薄膜，PTFE薄膜与介质(隔膜腔27中的一体)接触，具有良好的耐腐蚀性。(3)根据柔性和密封的不同需求，将圆形隔膜1设计成非均一厚度，提高效率和密封可靠性。
基于上述隔膜泵，本申请还提供一种应用上述隔膜泵的农业植保无人机。
请同时参阅图15，本申请的实施例的农业植保无人机100包括机架110、喷洒系统120、以及水箱130。喷洒系统120安装在机架110上。机架110包 括中心机体111以及从中心机体111延伸出来的多个机臂112，具体在图示的实施例中，多个机臂112与中心机体111可转动连接。
其中，喷洒系统120包括隔膜泵2以及喷头121。喷头121通过管道与隔膜泵2相连通。水箱130安装在机架110上，并且通过管道与隔膜泵2相连通。隔膜泵2将水箱130内的液体泵取至喷头121。
在本申请的描述中，除非另有明确的规定和限定，术语“多个”是指两个或两个以上；除非另有规定或说明，术语“连接”、“固定”等均应做广义理解，例如，“连接”可以是固定连接，也可以是可拆卸连接，或一体地连接，或电连接；可以是直接相连，也可以通过中间媒介间接相连。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。
本说明书的描述中，需要理解的是，术语“上”、“下”、“前”、“后”、“左”、“右”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或单元必须具有特定的方向、以特定的方位构造和操作，因此，不能理解为对本申请的限制。
在本说明书的描述中，术语“一个实施例”、“一些实施例”、“具体实施例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或特点包含于本申请的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例或实例。而且，描述的具体特征、结构、材料或特点可以在任何的一个或多个实施例或示例中以合适的方式结合。
以上所述仅为本申请的优选实施例而已，并不用于限制本申请，对于本领域的技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (19)

  1. 一种隔膜泵，其中，包括：
    泵体；
    泵盖，设置在所述泵体上；和
    隔膜，位于所述泵体与所述泵盖之间，所述隔膜与所述泵盖共同形成隔膜腔，所述隔膜腔设有进液口以及出液口；
    其中，所述隔膜包括隔膜本体、第一紧固件以及含氟树脂保护层；所述第一紧固件与所述隔膜本体的中部固定连接，用于所述隔膜本体与所述泵体之间的连接；所述含氟树脂保护层设置在所述隔膜本体靠近所述隔膜腔的一侧；
    通过所述第一紧固件能够带动所述隔膜本体变形，以改变所述隔膜腔的大小，使得所述隔膜将所述隔膜腔的液体从所述出液口排出，或从所述进液口吸入液体。
  2. 根据权利要求1所述的隔膜泵，其中，
    所述隔膜本体上背离所述隔膜腔的一侧设有一端开口的安装孔，所述安装孔为盲孔，所述第一紧固件的头部自所述安装孔的开口端插入所述安装孔并限位于所述安装孔内。
  3. 根据权利要求1所述的隔膜泵，其中，
    所述第一紧固件的头部与所述隔膜本体相粘结。
  4. 根据权利要求1所述的隔膜泵，其中，
    所述含氟树脂保护层包括PTFE薄膜。
  5. 根据权利要求1所述的隔膜泵，其中，
    所述含氟树脂保护层粘结在所述隔膜本体上。
  6. 根据权利要求1所述的隔膜泵，其中，
    所述隔膜本体包括工作区域和密封区域，沿由内向外的方向，所述工作区域和所述密封区域依次设置，且所述工作区域的厚度小于所述密封区域的厚度。
  7. 根据权利要求6所述的隔膜泵，其中，
    所述工作区域的厚度的范围为1mm～2mm；和/或，所述密封区域的厚度大于或等于2mm。
  8. 根据权利要求6所述的隔膜泵，其中，
    所述工作区域沿所述隔膜本体的周向延伸并呈环形；和/或，所述密封区域沿所述隔膜本体的周向延伸并呈环形。
  9. 根据权利要求6所述的隔膜泵，其中，
    所述工作区域上背离所述含氟树脂保护层的一侧设有凹槽，以使所述工作区域的厚度小于所述密封区域的厚度。
  10. 根据权利要求9所述的隔膜泵，其中，
    所述工作区域上背离所述含氟树脂保护层的一侧设有凸台部，所述凹槽位于所述凸台部的外侧并呈沿所述凸台部的周向延伸的环形，所述第一紧固件的头部嵌入所述凸台部内。
  11. 根据权利要求10所述的隔膜泵，其中，
    所述凸台部的厚度大于或等于1mm。
  12. 根据权利要求1至11中任一项所述的隔膜泵，其中，
    所述隔膜本体呈圆形，所述第一紧固件的头部固定在所述隔膜本体的中部。
  13. 根据权利要求1至11中任一项所述的隔膜泵，其中，
    所述隔膜本体上背离所述隔膜腔的一侧和所述泵体中的一个上设有定位筋，另一个上设有与所述定位筋相对应的定位槽，所述定位筋与所述定位槽相配合，用于所述隔膜本体与所述泵体之间的定位。
  14. 根据权利要求13所述的隔膜泵，其中，
    所述定位筋的数量为多个并沿所述隔膜本体上背离所述隔膜腔的一侧和所述泵体中的所述一个的周向间隔设置，或者，所述定位筋呈沿所述隔膜本体上背离所述隔膜腔的一侧和所述泵体中的所述一个的周向设置的环形。
  15. 根据权利要求1至11中任一项所述的隔膜泵，其中，
    所述泵体包括驱动机构和传动机构，所述驱动机构能够带动所述传动机构运动，所述传动机构与所述隔膜本体通过所述第一紧固件相连接，以在所述驱动机构的作用下带动所述隔膜往复运动。
  16. 根据权利要求15所述的隔膜泵，其中，
    所述传动机构包括曲柄连杆机构，所述曲柄连杆机构包括转动连接地曲轴和连杆，所述曲轴与所述驱动机构相连接，所述连杆与所述隔膜本体通过所述第一紧固件相连接；或者，
    所述传动机构包括齿轮齿条摆动机构，所述齿轮齿条摆动机构包括相啮合的齿轮和齿条，所述齿轮与所述驱动机构相连接，所述齿条与所述隔膜本体通过所述第一紧固件相连接；或者，
    所述传动机构包括偏心轮和支架，所述偏心轮与所述驱动机构相连接，所述支架与所述偏心轮的外轮廓相抵接，且所述支架与所述隔膜本体通过所述第一紧固件相连接。
  17. 根据权利要求1至11中任一项所述的隔膜泵，其中，
    所述泵体与所述泵盖之间通过第二紧固件相连接。
  18. 一种喷洒系统，其中，包括：
    权利要求1至17中任一项所述的隔膜泵；以及
    喷头，通过管道与所述隔膜泵相连通；
    其中，所述隔膜泵将液体泵取至所述喷头，并通过所述喷头喷洒出去。
  19. 一种农业植保无人机，其中，包括：
    机架；
    权利要求18所述的喷洒系统，安装在所述机架上；以及
    水箱，安装在所述机架上，并且通过管道与所述隔膜泵相连通；
    其中，所述隔膜泵将所述水箱内的液体泵取至所述喷头。
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CN113153704A (zh) * 2021-04-26 2021-07-23 贝德凯利电气（深圳）有限公司 一种皮碗结构以及隔膜泵的传动机构

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