CN109969797B - Electromagnetic drive type negative pressure pump - Google Patents
Electromagnetic drive type negative pressure pump Download PDFInfo
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- CN109969797B CN109969797B CN201910309992.9A CN201910309992A CN109969797B CN 109969797 B CN109969797 B CN 109969797B CN 201910309992 A CN201910309992 A CN 201910309992A CN 109969797 B CN109969797 B CN 109969797B
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- 230000005540 biological transmission Effects 0.000 claims description 29
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- 238000000034 method Methods 0.000 claims description 13
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- 238000001179 sorption measurement Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 5
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000005489 elastic deformation Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
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- 229910001208 Crucible steel Inorganic materials 0.000 description 1
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- 239000011248 coating agent Substances 0.000 description 1
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- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
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- 229920001296 polysiloxane Polymers 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/40—Feeding or discharging devices
- B65G53/50—Pneumatic devices
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- Reciprocating Pumps (AREA)
Abstract
An electromagnetic driving type negative pressure pump relates to the technical field of negative pressure pumps. It comprises the following steps: the device comprises a pump body with a containing cavity, wherein a feeding nozzle and a discharging nozzle are arranged on the pump body, and a diaphragm piece is arranged in the pump body; and the electromagnetic driving device is fixedly arranged on the pump body, is fixedly assembled with the diaphragm member at the power output end, is used for guiding materials entering the feeding nozzle into the accommodating cavity of the pump body and driving the diaphragm member to elastically deform so as to change the volume of the accommodating cavity of the pump body. By adopting the technical scheme, the service life of the negative pressure pump can be effectively prolonged, and the negative pressure pump has the advantages of stable driving effect, long service life, low manufacturing cost, low noise and stable operation.
Description
Technical Field
The invention relates to the technical field of negative pressure pumps, in particular to an electromagnetic driving type negative pressure pump.
Background
The miniature negative pressure pump is referred to as a miniature vacuum pump. Because the feeding mouth and the discharging mouth are respectively provided with a feeding mouth and a discharging mouth, vacuum or negative pressure (relative vacuum) can be continuously formed at the feeding mouth, and micro-positive pressure is formed at the discharging mouth. The micro vacuum pump is called a small negative pressure pump because of the negative pressure formed at the feeding nozzle. The simple working principle is as follows: the circular motion of motor makes the diaphragm inside the pump reciprocating motion through mechanical device to the air in compression, the tensile pump chamber forms the negative pressure, produces pressure differential with external atmospheric pressure in feed inlet department, under the effect of pressure differential, inhales the pump chamber with the material, discharges from the discharge gate again.
The existing small negative pressure pump generally adopts a belt motor as a power source, so that a volume change is generated in a cavity in the small negative pressure pump, the pressure in the cavity is changed, and materials in the cavity are fed and discharged. Because the motor has a certain service life, the motor can be easily damaged or scrapped when the service life reaches the rated service life, so that the miniature damage is caused, and therefore, the motor needs to be improved.
Disclosure of Invention
The invention aims to overcome the defects and shortcomings of the prior art, and provides an electromagnetic driving type negative pressure pump which can effectively avoid the problem that the first cavity is difficult to recover after negative pressure occurs, and has the advantages of stable driving effect, long service life, low manufacturing cost, low noise and stable operation.
In order to achieve the above purpose, the invention adopts the following technical scheme: an electromagnetically driven negative pressure pump comprising: the device comprises a pump body with a containing cavity, wherein a feeding nozzle and a discharging nozzle are arranged on the pump body, and a diaphragm piece is arranged in the pump body; and the electromagnetic driving device is fixedly arranged on the pump body, is fixedly assembled with the diaphragm member at the power output end, is used for guiding materials entering the feeding nozzle into the accommodating cavity of the pump body and driving the diaphragm member to elastically deform so as to change the volume of the accommodating cavity of the pump body.
The pump body includes: the feeding nozzle is arranged on the side wall of the main shell; the top shell is assembled with the main shell in a sealing way, and the discharging nozzle is arranged on one side, far away from the main shell, of the top shell; the valve plate is arranged on the main shell and positioned between the main shell and the top shell, and is used for discharging materials in the accommodating cavity of the pump body, and a discharge port is arranged on the valve plate and is in butt joint with the discharge nozzle; the first valve plate is arranged between the valve plate and the top shell and is used for being combined with the valve plate to form a one-way valve structure so as to control the opening or closing of the discharge port; and the diaphragm piece is arranged on the main shell, the diaphragm piece, the main shell and the valve plate enclose a first cavity to contain materials to be discharged, and when the negative pressure pump works, the diaphragm piece is used for deforming to change the volume of the first cavity.
The diaphragm piece is installed in the installation groove through the assembly compaction between the main shell and the top shell.
The electromagnetic drive apparatus includes: the hollow inductance component is fixedly assembled with the pump body and is used for generating magnetic force when being electrified and losing the magnetic force when being powered off; the magnetic metal block, the diaphragm piece and the main shell are enclosed to form a second cavity for accommodating materials entering from a feeding nozzle; an inner core which is arranged in the hollow part of the inductance component and can slide relative to the inductance component, generates magnetic force to be adsorbed on the magnetic metal block when the inductance component is electrified, and releases the adsorption with the magnetic metal block when the inductance component is powered off; the elastic piece is arranged between the magnetic metal block and the inner core, one end of the elastic piece is fixedly assembled with the magnetic metal block, the other end of the elastic piece is fixedly assembled with the inner core, and the elastic piece is used for providing restoring force for resetting the inner core when the inductance component is powered off; and one end of the transmission component is fixedly assembled with the diaphragm piece, the other end of the transmission component penetrates through the magnetic metal block and is fixedly assembled with the inner core, and the transmission component can synchronously move along with the inner core when the inner core slides so as to change the volumes of the first cavity and the second cavity, and when the volume of the first cavity is increased, the transmission component is used for guiding the material in the second cavity into the first cavity.
Be provided with the mounting hole on the magnetism metal piece, drive assembly includes: the driving head is arranged in the second cavity in a sliding mode and fixedly assembled with the diaphragm piece, a feeding channel is arranged on the driving head, and the feeding channel is used for guiding materials in the second cavity into the first cavity; and a transmission rod which is partially accommodated in the mounting hole and can slide along the axis of the mounting hole, one end of which is fixedly assembled with the inner core, and the other end of which is fixedly assembled with the driving head, and is used for transmitting the movement of the inner core to the driving head.
The diaphragm piece is provided with a mounting part, the mounting part is provided with a feed inlet, the feed inlet is in butt joint with a discharge port of the feed channel, a second valve plate is arranged between the feed inlet and the driving head, the second valve plate is matched with the driving head to form a one-way valve structure, and the second valve plate is used for controlling the opening or closing of the feed channel.
The inductance assembly includes: the coil rack is fixedly assembled with the pump body, a hollow cavity is arranged on the coil rack, and the inner core is arranged in the hollow cavity; a coil wound on the bobbin and electrically connected to an external power source, generating magnetic lines of force to magnetize the inner core when energized, and coating an insulating layer on the outer surface; and the metal shell is sleeved on the coil frame and used for wrapping the coil and enhancing the strength of magnetic force lines generated by the coil.
The middle part of the coil rack is provided with a concave part and is in an I shape as a whole, and the coil is wound on the concave part.
And a sealing ring is arranged between the coil rack and the pump body.
The magnetic metal block is provided with a vent hole, the vent hole is communicated with the second cavity and the hollow cavity, and the vent hole is used for reducing the pressure in the hollow cavity so as to reset the inner core.
After the technical scheme is adopted, the invention has the beneficial effects that: when the electromagnetic driving type negative pressure pump is used, the coil is electrified, then a magnetic induction line is generated after the coil is electrified, and then the inner core arranged in the hollow cavity is magnetized by the magnetic induction line, so that the inner core has magnetism, the magnetic inner core adsorbs the magnetic metal block under the action of magnetic force, and the magnetic metal block is fixedly arranged on the coil frame, so that the inner core moves to one side of the magnetic metal block under the action of magnetic force, and the elastic piece is compressed in the moving process until the magnetic metal block is adsorbed; in the process of movement of the inner core, the movement is transmitted to the driving head through the transmission rod, so that the driving head moves to one side of the valve plate, and the driving head is fixedly assembled with the diaphragm member, so that the diaphragm member is driven to elastically deform while the driving head moves, thereby compressing the volume of the first cavity, at the moment, the first valve plate is opened, and the material in the first cavity is pressed to the discharge hole and discharged from the discharge nozzle, so that the discharge of the material is realized; then the coil is powered off, so that the inner core loses magnetism, at the moment, the compressed elastic piece restores to the original length under the condition of self elasticity, the inner core is driven to move to the side far away from the magnetic metal block until the inner core returns to the initial position, in the process of resetting the inner core, the driving head is driven to move to the side far away from the valve plate through the transmission rod, in the process of moving the driving head to the side far away from the valve plate, the diaphragm piece is pulled to elastically deform, so that the volume in the first cavity is increased, the volume of the second cavity is compressed, at the moment, materials enter the second cavity from the feeding nozzle, the second valve plate is opened, and the materials stored in the second cavity enter the first cavity through the feeding channel and the feeding hole, so that feeding is realized; the negative pressure pump that sets up like this realizes the reciprocating motion of drive assembly through the break-make electricity of coil to drive diaphragm spare takes place elastic deformation, realizes the material business turn over of negative pressure pump, has the driving effect stability, long service life, low in manufacturing cost, and the noise is little, operates steady advantage.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a schematic overall structure of the first embodiment;
FIG. 2 is a top view corresponding to FIG. 1;
FIG. 3 is a cross-sectional view taken along section line A-A of FIG. 2;
FIG. 4 is an exploded view of the first embodiment;
FIG. 5 is a schematic diagram of the overall structure of the second embodiment;
FIG. 6 is a top view corresponding to FIG. 5;
FIG. 7 is a cross-sectional view taken along section line B-B in FIG. 6;
fig. 8 is an exploded view of the second embodiment.
Reference numerals illustrate: 1. a pump body; 2. an electromagnetic driving device; 3. a receiving chamber; 4. a feed nozzle; 5. a discharge nozzle; 6. a diaphragm member; 7. a main housing; 8. a top shell; 9. a valve plate; 10. a first valve plate; 11. a discharge port; 12. a first cavity; 13. a second cavity; 14. a fastening bolt; 15. a positioning groove; 16. a positioning block; 17. a bump; 18. an inductance assembly; 19. a magnetic metal block; 20. an inner core; 21. an elastic member; 22. a transmission assembly; 23. a vent hole; 24. a drive head; 25. a transmission rod; 26. a feed channel; 27. a feed inlet; 28. a second valve plate; 29. a coil former; 30. a coil; 31. a metal housing; 32. a hollow cavity; 33. a concave portion.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The present embodiment is only for explanation of the present invention and is not to be construed as limiting the present invention, and those skilled in the art can make modifications to the present embodiment which do not contribute to the invention as required after reading the present specification, but are protected by the patent laws within the scope of the appended claims.
Embodiment one: the present embodiment relates to an electromagnetically driven negative pressure pump, which is a diaphragm type negative pressure pump, as shown in fig. 1 to 4, including: the pump body 1 and the electromagnetic drive 2.
As shown in fig. 1-4, a containing cavity 3 is arranged in the pump body 1, a feeding nozzle 4 and a discharging nozzle 5 are arranged on the pump body 1, and a diaphragm member 6 is arranged in the pump body 1. The electromagnetic driving device 2 is fixedly arranged on the pump body 1, the power output end of the electromagnetic driving device 2 is fixedly assembled with the diaphragm member 6, and the electromagnetic driving device 2 is used for guiding materials entering through the feeding nozzle 4 into the accommodating cavity 3 of the pump body 1 and driving the diaphragm member 6 to elastically deform, so that the volume of the accommodating cavity 3 of the pump body 1 is changed, and the material entering and exiting are realized.
As shown in fig. 1 to 4, the pump body 1 includes: the main casing 7, the top casing 8, the valve plate 9, the first valve plate 10, and the diaphragm member 6. The main casing 7 is the main body of the pump body 1, and the feed nozzle 4 is provided on the side wall of the main casing 7. The top shell 8 is assembled with the main shell 7 in a sealing way, and the discharging nozzle 5 is arranged on one side, far away from the main shell 7, of the top shell 8. A valve plate 9 is mounted on the main casing 7 between the main casing 7 and the top casing 8. The valve plate 9 is used for discharging the material in the accommodating cavity 3 of the pump body 1. A discharge hole 11 is arranged on the valve plate 9, and the discharge hole 11 is in butt joint with the discharge nozzle 5. The first valve plate 10 is arranged between the valve plate 9 and the top shell 8, and the first valve plate 10 is used for forming a one-way valve structure by combining with the valve plate 9, so as to control the opening or closing of the discharge hole 11. The diaphragm member 6 is mounted on the main casing 7, and the diaphragm member 6 is used for dividing the accommodating chamber 3 into two chambers, namely a first chamber 12 and a second chamber 13. The first cavity 12 is used for containing the materials to be discharged, and the second cavity 13 is used for containing the materials entering from the feeding nozzle 4. The first chamber 12 is defined by the diaphragm member 6, the main housing 7 and the valve plate 9. When the negative pressure pump works, the diaphragm member 6 is used for deforming to change the volume of the first cavity 12, so as to realize the entry and the discharge of materials in the first cavity 12.
As shown in fig. 1 to 4, in the present embodiment, the main casing 7 is provided with a mounting groove in which the diaphragm member 6 is compressively mounted by fitting between the main casing 7 and the top casing 8. The discharge nozzle 5 and the top shell 8 are integrally formed, and the feed nozzle 4 and the main shell 7 are integrally formed. The main shell 7 and the top shell 8 are fixedly assembled through three fastening bolts 14. Three positioning grooves 15 are formed in the top shell 8, three positioning blocks 16 are arranged on the main shell 7, and when the main shell 7 and the top shell 8 are assembled, the three positioning grooves 15 and the three positioning blocks 16 are positioned at first, and then the fastening bolts 14 are used for locking. When the top case 8 is locked with the main case 7, the first valve plate 10, the valve plate 9, and the diaphragm member 6 are press-fitted between the top case 8 and the main case 7. In order to facilitate the mounting and positioning of the valve plate 9, a projection 17 is provided on the side wall of the receiving chamber 3. The diaphragm member 6 is made of a flexible material having elasticity (e.g., rubber, silicone, etc.). In other embodiments, the fastening bolts 14 may be provided with four, five, etc. The positioning groove 15 and the positioning block 16 may be provided with two, one, four, etc.
As shown in fig. 1 to 4, the electromagnetic driving device 2 includes: inductance assembly 18, magnetic metal block 19, inner core 20, elastic member 21, and transmission assembly 22.
The inductance component 18 is fixedly assembled with the pump body 1, and the inductance component 18 is used for generating magnetic force when electrified and losing magnetic force when powered off, and a hollow part is arranged inside the inductance component 18. The magnetic metal block 19 is assembled with one side of the inductance component 18, which is close to the pump body 1, in an inserting way, and the other part is inserted into the hollow part of the inductance component 18. The second cavity 13 is surrounded by the magnetic metal block 19, the diaphragm member 6 and the main casing 7 to accommodate the material entering from the feed nozzle 4. The core 20 is disposed within the hollow portion of the inductance assembly 18 and is slidable relative to the inductance assembly 18. The core 20 generates a magnetic force when the inductance assembly 18 is energized, thereby being attracted to the magnetic metal block 19. The core 20 loses magnetic force when the inductance assembly 18 is powered down, thereby desorbing from the magnetic metal block 19. The elastic member 21 is disposed between the magnetic metal block 19 and the inner core 20. One end of the elastic member 21 is fixedly assembled with the magnetic metal block 19, and the other end is fixedly assembled with the inner core 20. The spring 21 is used to provide a restoring force for the return of the core 20 when the inductance assembly 18 is de-energized. One end of the transmission component 22 is fixedly assembled with the diaphragm member 6, and the other end passes through the magnetic metal block 19 and is fixedly assembled with the inner core 20. As the core 20 slides, the transmission assembly 22 moves synchronously with the core 20, thereby driving the diaphragm member 6 to deform to change the volumes of the first and second chambers 12 and 13. The transmission assembly 22 is used to introduce the material in the second chamber 13 into the first chamber 12 as the volume of the first chamber 12 increases.
In the present embodiment, as shown in fig. 1 to 4, the elastic member 21 is a spring, and the spring is fixed to the magnetic metal block 19 and the inner core 20 by inserting. In order to reduce the pressure in the hollow cavity 32 and facilitate the resetting of the inner core 20, a vent hole 23 is arranged on the magnetic metal block 19, and the vent hole 23 communicates the second cavity 13 with the hollow cavity 32. In other embodiments, the elastic member 21 may be a spring block or a spring plate. The assembly relationship between the spring and the magnetic metal block 19 and between the spring and the inner core 20 can also be welding, clamping and fixing, etc.
As shown in fig. 1 to 4, the magnetic metal block 19 is provided with a mounting hole, and the transmission assembly 22 includes: the drive head 24 and the transmission rod 25. The driving head 24 is slidably mounted in the second chamber 13 and fixedly assembled with the diaphragm member 6. The driving head 24 is provided with a feeding channel 26, and the feeding channel 26 is used for guiding the material in the second cavity 13 into the first cavity 12, so that the driving head 24 can guide the material into the first cavity 12 in the moving process. The transmission rod 25 is partially accommodated in the mounting hole and is slidable along the axis of the mounting hole. One end of a transmission rod 25 is fixedly assembled with the inner core 20, and the other end is fixedly assembled with the driving head 24, and the transmission rod 25 is used for transmitting the movement of the inner core 20 to the driving head 24.
In this embodiment, the diaphragm member 6 is provided with a mounting portion, the mounting portion is provided with a feed inlet 27, the feed inlet 27 is in butt joint with a discharge port of the feed channel 26, a second valve plate 28 is disposed between the feed inlet 27 and the driving head 24, a step portion is disposed on one side of the driving head 24, which is close to the diaphragm member 6, and the second valve plate 28 is sleeved on the step portion. The second valve plate 28 cooperates with the driving head 24 to form a one-way valve structure, and the second valve plate 28 is used for controlling the opening or closing of the discharge port of the feed channel 26. The lower end of the driving head 24 is provided with a jack, and a transmission rod 25 is inserted into the jack. In other embodiments, the drive head 24 is integrally formed with the drive rod 25.
As shown in fig. 1-4, the inductance assembly 18 includes: a bobbin 29, a coil 30, and a metal housing 31. The coil frame 29 is fixedly assembled with the pump body 1, and a hollow cavity 32 is arranged on the coil frame 29, and the hollow cavity 32 is the hollow part of the inductance assembly 18. The core 20 is disposed within the hollow cavity 32. The coil 30 is wound around the bobbin 29 and is electrically connected to an external power source. When energized, the coil 30 generates magnetic lines of force to magnetize the core 20, and the coil 30 is coated with an insulating layer on the outer surface. The metal shell 31 is sleeved on the coil frame 29, and the metal shell 31 is used for wrapping the coil 30 and enhancing the intensity of magnetic force lines generated by the coil 30.
In this embodiment, in order to facilitate the assembly between the coil frame 29 and the main housing 7, a clamping groove is provided on the coil frame 29, and a clamping block is provided on the main housing 7, so that the positioning and assembly of the coil frame 29 are facilitated by the cooperation of the clamping block and the clamping groove. The coil frame 29 has a concave portion 33 at the middle thereof, and is shaped like an "I" as a whole, and the coil 30 is wound around the concave portion 33. The size of the section of the coil frame 29 is the same as the outer diameter of the pump body 1, thereby ensuring the overall aesthetic appearance of the negative pressure pump. The inner core 20 and the magnetic metal block 19 are made of iron. In order to ensure tightness between the pump body 1 and the coil frame 29 after assembly, a seal ring is provided between the coil frame 29 and the pump body 1. In other embodiments, the material of the inner core 20 and the magnetic metal block 19 may be any of cobalt, nickel, complex, and cast steel. The assembly relationship between the transmission rod 25 and the driving head 24 can also be welding forming, clamping and fixing, screw thread assembly and the like.
The working principle of the present embodiment is approximately as follows: when the electromagnetic driven negative pressure pump is used, the coil 30 is electrified, a magnetic induction line is generated after the coil 30 is electrified, and then the inner core 20 arranged in the hollow cavity 32 is magnetized by the magnetic induction line, so that the inner core 20 has magnetism, the inner core 20 with magnetism adsorbs the magnetic metal block 19 under the action of magnetic force, and the magnetic metal block 19 is fixedly arranged on the coil frame 29, so that the inner core 20 moves to one side of the magnetic metal block 19 under the action of magnetic force, and the elastic piece 21 is compressed in the moving process until the magnetic metal block 19 is adsorbed; in the process of the movement of the inner core 20, the movement is transmitted to the driving head 24 through the transmission rod 25, so that the driving head 24 moves to one side of the valve plate 9, and the driving head 24 is fixedly assembled with the diaphragm member 6, so that the diaphragm member 6 is driven to elastically deform while the driving head 24 moves, thereby compressing the volume of the first cavity 12, at the moment, the first valve plate 10 is opened, and the material in the first cavity 12 is pressed to the discharge port 11 and discharged from the discharge port 5, so that the discharge of the material is realized; then the coil 30 is powered off to remove magnetism, at this time, the compressed elastic piece 21 restores to original length under the condition of self elasticity, so that the inner core 20 is driven to move to the side far away from the magnetic metal block 19 until the inner core 20 returns to the initial position, in the process of resetting the inner core 20, the driving head 24 is driven to move to the side far away from the valve plate 9 through the transmission rod 25, in the process of moving the driving head 24 to the side far away from the valve plate 9, the diaphragm piece 6 is pulled to elastically deform, so that the volume in the first cavity 12 is increased, the volume of the second cavity 13 is compressed, at this time, the material enters the second cavity 13 from the feeding nozzle 4, the second valve plate 28 is opened, and the material stored in the second cavity 13 enters the first cavity 12 through the feeding channel 26 and the feeding hole 27, so that feeding is realized; the negative pressure pump that sets up like this realizes the reciprocating motion of drive assembly 22 through the break-make of coil 30 to drive diaphragm spare 6 takes place elastic deformation, realizes the material business turn over of negative pressure pump, has the driving effect stability, long service life, low in manufacturing cost, and the noise is little, operates steady advantage.
Embodiment two: the present embodiment is a piston type negative pressure pump, and the difference between the present embodiment and the first embodiment is mainly that, as shown in fig. 5 to 8, the diaphragm member 6 is not provided in the pump body 1 in the present embodiment. In the present embodiment, the upper portion of the outer wall of the drive head 24 abuts against the inner wall of the accommodation chamber 3, and the lower portion of the outer wall of the drive head 24 is provided with a feed hole. The first cavity 12 is surrounded by the main shell 7, the valve plate 9 and the driving head 24, and the second cavity 13 is formed by deterring the main shell 7, the driving head 24 and the magnetic metal block 19. The radial dimension of the upper half of the drive head 24 is greater than the radial dimension of the lower half. A circular groove is formed in the side, close to the valve plate 9, of the driving head 24, and a second valve plate 28 is fixedly arranged in the second mounting groove.
When the negative pressure pump works, through the on-off of the coil 30, the inner core 20 reciprocates in the central control cavity under the action of magnetic force and the elastic force of the spring, so that the driving head 24 is driven to slide in the accommodating cavity 3 through the transmission rod 25, the volumes of the first cavity 12 and the second cavity 13 are continuously changed, and the extraction and discharge of materials are realized.
The above description is only for the purpose of illustrating the technical solution of the present invention and not for the purpose of limiting the same, and other modifications and equivalents thereof by those skilled in the art should be included in the scope of the claims of the present invention without departing from the spirit and scope of the technical solution of the present invention.
Claims (8)
1. An electromagnetically driven negative pressure pump, comprising:
the novel plastic pump comprises a pump body (1) with a containing cavity (3), wherein a feeding nozzle (4) and a discharging nozzle (5) are arranged on the pump body (1), and a diaphragm piece (6) is arranged inside the pump body (1); the method comprises the steps of,
the electromagnetic driving device (2) is fixedly arranged on the pump body (1), is fixedly assembled with the diaphragm member (6) at the power output end, is used for guiding materials entering from the feeding nozzle (4) into the accommodating cavity (3) of the pump body (1) and driving the diaphragm member (6) to elastically deform so as to change the volume of the accommodating cavity (3) of the pump body (1);
the pump body (1) comprises:
a main shell (7), wherein the feeding nozzle (4) is arranged on the side wall of the main shell (7);
the top shell (8), the top shell (8) is assembled with the main shell (7) in a sealing way, and the discharging nozzle (5) is arranged on one side, far away from the main shell (7), of the top shell (8);
the valve plate (9), the valve plate (9) is installed on the main shell (7) and is located between the main shell (7) and the top shell (8), the valve plate (9) is used for discharging materials in the accommodating cavity (3) of the pump body (1), a discharge hole (11) is formed in the valve plate (9), and the discharge hole (11) is in butt joint with the discharge hole (5);
the first valve plate (10) is arranged between the valve plate (9) and the top shell (8), and the first valve plate (10) is used for being combined with the valve plate (9) to form a one-way valve structure so as to control the opening or closing of the discharge port (11);
the diaphragm piece (6) is arranged on the main shell (7), the diaphragm piece (6), the main shell (7) and the valve plate (9) are enclosed to form a first cavity (12) so as to contain materials to be discharged, and when the negative pressure pump works, the diaphragm piece (6) is used for deforming so as to change the volume of the first cavity (12);
the electromagnetic drive device (2) comprises:
an air core inductance component (18) which is fixedly assembled with the pump body (1) and is used for generating magnetic force when being electrified and losing magnetic force when being cut off;
the magnetic metal block (19) is inserted into the hollow part of the inductance component (18) from the other part, which is assembled on the inductance component (18) and is close to one side of the pump body (1), and the magnetic metal block (19), the diaphragm piece (6) and the main shell (7) are enclosed to form a second cavity (13) so as to contain materials entering from the feeding nozzle (4);
an inner core (20) which is provided in a hollow portion of the inductance component (18) and is slidable with respect to the inductance component (18), generates magnetic force to be adsorbed on the magnetic metal block (19) when the inductance component (18) is energized, and releases the adsorption with the magnetic metal block (19) when the inductance component (18) is deenergized;
an elastic member (21) provided between the magnetic metal block (19) and the inner core (20), having one end fixedly assembled with the magnetic metal block (19) and the other end fixedly assembled with the inner core (20), and for providing a restoring force for resetting the inner core (20) when the inductance assembly (18) is powered off; the method comprises the steps of,
one end of the transmission component (22) is fixedly assembled with the diaphragm piece (6), the other end of the transmission component passes through the magnetic metal block (19) and is fixedly assembled with the inner core (20), and the transmission component can synchronously move along with the inner core (20) when the inner core (20) slides so as to change the volumes of the first cavity (12) and the second cavity (13), and when the volume of the first cavity (12) is increased, the transmission component (22) is used for guiding materials in the second cavity (13) into the first cavity (12).
2. The electromagnetic driven negative pressure pump according to claim 1, characterized in that the main housing (7) is provided with a mounting groove, and the diaphragm member (6) is compressively mounted in the mounting groove by means of the assembly between the main housing (7) and the top housing (8).
3. The electromagnetic driven negative pressure pump according to claim 1, characterized in that the magnetic metal block (19) is provided with a mounting hole, and the transmission assembly (22) comprises:
the driving head (24) is slidably arranged in the second cavity (13) and fixedly assembled with the diaphragm piece (6), a feeding channel (26) is arranged on the driving head (24), and the feeding channel (26) is used for guiding materials in the second cavity (13) into the first cavity (12); the method comprises the steps of,
and a transmission rod (25) which is partially accommodated in the mounting hole and can slide along the axis of the mounting hole, one end of which is fixedly assembled with the inner core (20), and the other end of which is fixedly assembled with the driving head (24) and is used for transmitting the movement of the inner core (20) to the driving head (24).
4. A negative pressure pump according to claim 3, characterized in that the diaphragm member (6) is provided with a mounting portion, the mounting portion is provided with a feed inlet (27), the feed inlet (27) is in butt joint with a discharge port of the feed channel (26), a second valve plate (28) is arranged between the feed inlet (27) and the driving head (24), the second valve plate (28) and the driving head (24) cooperate to form a one-way valve structure, and the second valve plate (28) is used for controlling the opening or closing of the feed channel (26).
5. The electromagnetically driven negative-pressure pump according to claim 4, characterised in that said inductance assembly (18) comprises:
a coil frame (29) fixedly assembled with the pump body (1), wherein a hollow cavity (32) is arranged on the coil frame (29), and the inner core (20) is arranged in the hollow cavity (32);
a coil (30) which is wound around the bobbin (29) and is electrically connected to an external power source, generates magnetic lines of force to magnetize the core (20) when energized, and is coated with an insulating layer on the outer surface; the method comprises the steps of,
and the metal shell (31) is sleeved on the coil frame (29) and used for wrapping the coil (30) and enhancing the intensity of magnetic force lines generated by the coil (30).
6. The electromagnetic driven negative pressure pump according to claim 5, characterized in that the middle part of the coil frame (29) is provided with a concave part (33) and is in an overall I shape, and the coil (30) is wound on the concave part (33).
7. The electromagnetically driven negative pressure pump according to claim 6, characterised in that a sealing ring is provided between said coil former (29) and said pump body (1).
8. The electromagnetic driven negative pressure pump according to claim 7, characterized in that a vent hole (23) is provided on the magnetic metal block (19), the vent hole (23) communicates the second cavity (13) with the hollow cavity (32), and the vent hole (23) is used for reducing the pressure in the hollow cavity (32) so as to reset the inner core (20).
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| JP5585569B2 (en) * | 2011-11-30 | 2014-09-10 | 株式会社デンソー | solenoid valve |
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| DE2659773A1 (en) * | 1976-12-31 | 1978-07-06 | Hugo Brennenstuhl | Paint spray gun with membrane pump - has actuating piston end and engaging membrane of corresponding diameter |
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