CN110523557B - Efficient handheld spray gun and spraying method - Google Patents
Efficient handheld spray gun and spraying method Download PDFInfo
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- CN110523557B CN110523557B CN201910763838.9A CN201910763838A CN110523557B CN 110523557 B CN110523557 B CN 110523557B CN 201910763838 A CN201910763838 A CN 201910763838A CN 110523557 B CN110523557 B CN 110523557B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
- B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
- B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
- B05B9/0403—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
- B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
- B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
- B05B9/047—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump supply being effected by follower in container, e.g. membrane or floating piston, or by deformation of container
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
- B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
- B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
- B05B9/08—Apparatus to be carried on or by a person, e.g. of knapsack type
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Abstract
The invention discloses a high-efficiency handheld spray gun and a spraying method, wherein the spray gun comprises a body (1) and a nozzle (2), a liquid outlet cavity (24) is arranged in the body, the nozzle (2) is arranged at one end of the body (1) along the length direction and is communicated with the liquid outlet cavity (24), and the high-efficiency handheld spray gun is characterized in that: the liquid outlet device also comprises a voltage stabilizer (4) arranged on the body (1), and the position of the voltage stabilizer (4) is communicated with the liquid outlet cavity (24); the pressure stabilizer is used for maintaining a stable spraying pressure on the spraying liquid in the liquid outlet cavity (24) and ensuring that the spraying liquid is continuously sprayed out of the nozzle (2). The spray gun has the advantages of simple structure, light holding, convenient liquid supplement and disassembly, good spraying effect, no liquid dripping and liquid leakage phenomenon, convenient and reliable use, and solves the problems of heavy electromagnet type spray gun, large noise, easy liquid dripping and liquid flowing during spray painting and the like.
Description
Technical Field
The invention belongs to the technical field of spray guns, and particularly relates to an efficient handheld spray gun and a spraying method.
Background
The spray gun is a device which uses compressed liquid or compressed air to quickly release as power, is most commonly applied to directly connect coating materials, realizes the spraying functions of glue spraying, glue spreading, paint spraying, coating and the like, and is widely applied to various fields.
One traditional structure is an electromagnet type spray gun, which comprises a gun body and a gun head, wherein the gun body and the gun head are connected through a connecting mechanism, and a storage tank for storing paint is arranged on the gun body; the gun head comprises a nozzle, compressed air generated by using the air compression principle generates a low-pressure area lower than the atmospheric pressure in front of a paint nozzle connected with the nozzle when being sprayed out through an air cap at the front part of the spray gun, the paint is sucked from a paint storage tank by the pressure difference generated at the nozzle opening of the spray gun, and the paint is atomized into particles and sprayed on the surface of a coated object under the action of high-speed jet force of the compressed air. The spray gun body is internally provided with a pump body, a plunger rod, a spring, an electromagnet and the like, the plunger rod and the spring are acted by the electromagnet, the electromagnet drives an armature, the armature acts on the plunger rod to perform high-speed reciprocating motion to form an empty suction phenomenon, a spray pump system sucks liquid to be sprayed from a storage tank in a vacuum manner, and simultaneously forms pressure to compress and spray the liquid to be sprayed from a nozzle. The traditional electromagnet spray gun has the following disadvantages:
1. because the liquid pumping and the liquid spraying of the spray gun are realized by impacting the plunger rod back and forth by the armature, the liquid sprayed out by the spray nozzle in the mode is sprayed out in a pulse mode, so that the phenomena of dripping and liquid flowing at the spray nozzle can be caused by long-time spraying, the handheld operation of an operator is influenced, the waste of the sprayed liquid is also caused, and the pollution is caused to the operation environment;
2. the armature iron is adsorbed by the electromagnet, the armature iron is in intermittent impact or release with the plunger rod to finally drive the piston rod to realize liquid spraying, the armature iron and the piston rod repeatedly impact to enable the whole spray gun to generate strong vibration, so that an operator cannot accurately hold a handle of the spray gun to accurately spray, although the armature iron is generally provided with damping sheets to absorb shock and reduce noise, the noise caused by the shock and the noise can be close to 100dB, the noise is large, the operation state of a user is influenced, certain environmental noise pollution can be caused, and the construction operation is not facilitated;
3. the spraying principle is based on repeated impact of the armature and the piston rod, so the spray gun has low spraying pressure, can only be suitable for spraying low-viscosity liquid, has poor applicability and cannot meet the actual use requirements of spraying with different concentrations;
4. the coating storage tank is arranged on the gun body, and is generally positioned at the upper end or the lower end of the gun body, so that the holding balance of the whole spray gun is influenced, the whole electric spray gun is heavy, then the gun holding mode is changed from time to time when the electric spray gun works for a long time during spraying operation, and a specific angle needs to be controlled for a long time, so that the hand fatigue of an operator is easily caused, or the angle inclination of the spray gun is generated during the spraying process, so that the coating is unevenly drawn out, the uneven spraying is interrupted, the spraying surface effect is poor, and other poor spraying effects are caused;
5. because the spray gun is used for the hand to hold and carry out the operation, consequently its coating basin volume is general little slightly, when carrying out the operation that work load is big, and the coating basin of single storage is not enough to be used, need stop the spraying, adds coating to the basin, carries out the spraying again, so reciprocal, and it is all troublesome from the body of a gun dismantlement and installation basin.
Therefore, there is still a need for research and improvement on the conventional electromagnet type spray gun to provide a spray gun technology with wider applicability and more adaptability to actual use requirements.
Disclosure of Invention
The invention aims to solve the problems of heavy weight, high noise, easy liquid dropping and flowing during paint spraying and the like of the conventional electromagnet type spray gun, and provides a high-efficiency handheld spray gun.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a high-efficient hand-held type spray gun, includes the pump body, handheld portion and nozzle, handheld portion locates pump body below, be equipped with out the sap cavity in the pump body, the nozzle locate the pump body along length direction's one end and with go out the sap cavity intercommunication, its characterized in that: the liquid outlet cavity is communicated with the liquid outlet cavity; the pressure stabilizer is used for maintaining a stable spraying pressure on the spraying liquid in the liquid outlet cavity and ensuring that the spraying liquid is continuously sprayed out by the nozzle.
Furthermore, the voltage stabilizer comprises a telescopic mechanism, a voltage stabilizing cavity communicated with the liquid outlet cavity is arranged in the pump body, the telescopic mechanism is arranged in the voltage stabilizing cavity, the telescopic mechanism closes a liquid inlet through which spraying liquid enters the voltage stabilizing cavity from the liquid outlet cavity, and the telescopic mechanism is extruded by the spraying liquid to telescopically adjust the size of a liquid storage space of the spraying liquid entering the voltage stabilizing cavity from the liquid outlet cavity.
Furthermore, the telescopic mechanism comprises a first spring and a piston connected with the first spring, the first spring is abutted (in extrusion fit) to the top of the pressure stabilizing cavity, and the piston at the lower part of the pressure stabilizing cavity closes the liquid inlet. Spraying liquid enters the liquid outlet cavity to extrude the piston, the piston is jacked up to enter the pressure stabilizing cavity, the piston is jacked up to cause the first spring to be compressed, the first spring is compressed into the pressure stabilizing cavity to form a liquid storage space communicated with the liquid outlet cavity, and the liquid storage space is filled with spraying liquid.
Furthermore, the pressure stabilizer further comprises an adjusting part in threaded connection with the pump body, the adjusting part is in abutting contact with one end of the first spring, the liquid inlet is provided with a limiting part used for limiting the piston in the pressure stabilizing cavity, and the adjusting part is used for adjusting the pressure of the first spring.
Furthermore, a backflow hole is formed in the inner wall of the upper end of the pressure stabilizing cavity, when spraying liquid in the liquid outlet cavity and the liquid storage space connected with the pressure stabilizing cavity is excessive, the pressure stabilizer moves to enable the communication space to be enlarged to the position of the backflow hole, and the spraying liquid flows out of the backflow hole. The telescopic mechanism is compressed to the minimum, namely the spring is compressed to the minimum, and then the return hole is exposed, so that the spraying liquid can conveniently return to a storage device outside the pump body.
When the liquid inlet amount is larger than the liquid outlet amount, the liquid in the pump body is excessive and the pressure is too high when the nozzle cannot spray the liquid in time. The spraying liquid jacks up and rises the pressure stabilizer, particularly a piston, and flows back to the stored container from the backflow hole.
Further, an exhaust knob is arranged between the liquid outlet cavity of the pump body and the nozzle, and the exhaust knob is detachably connected with the pump body through a valve rod fixing sleeve; and a valve rod with one end extending out of the valve rod fixing sleeve is arranged in the liquid outlet cavity.
Furthermore, a liquid suction cavity, a liquid outlet cavity and a nozzle are arranged on the same axis in sequence, and a check valve is arranged between the liquid suction cavity and the liquid outlet cavity; the liquid suction cavity is internally provided with a linear pushing device, the linear pushing device reciprocates to push the spraying liquid from the liquid suction cavity to the check valve, and the check valve is opened to enter the liquid outlet cavity when the preset pressure is reached.
Furthermore, the linear pushing device comprises a driving mechanism, an eccentric bearing assembly and a plunger rod which are sequentially arranged, the driving mechanism drives the eccentric bearing assembly to move, the eccentric bearing assembly drives the plunger rod to do linear reciprocating motion, negative pressure is formed in the liquid suction cavity, and after the spraying liquid is sucked from the outside into the liquid suction cavity and pushed to enter the liquid outlet cavity, the spraying liquid is finally sprayed out from the nozzle.
Furthermore, the driving mechanism comprises a motor, a driving gear, a driven gear and a connecting shaft, the driving gear is sleeved on the motor spindle, the driving gear is meshed with the driven gear, the driven gear is sleeved at one end of the connecting shaft, and the other end of the connecting shaft is connected with the eccentric bearing assembly. The motor is a permanent magnet motor.
In the traditional electromagnet spray gun, because the electromagnet repeatedly beats the armature to push the plunger rod, the beating generates about 100dB of noise, but the new spray gun adopted by the invention is about 50dB, and the noise reduction effect is more obvious. The spray gun noise is reduced by changing the original mode that the electromagnet repeatedly attracts the armature to push the plunger rod into the mode that the permanent magnet motor drives the eccentric bearing assembly to drive the plunger rod to work, and the noise is effectively reduced by the driving mode with the new structure.
Furthermore, the spray gun also comprises a backpack type liquid storage bag which is communicated with the pump body through a liquid outlet pipe and used for storing spraying liquid.
The invention also provides a method for performing stable-pressure spraying by using the spray gun, which comprises the following steps:
s1 the spray gun starts to suck liquid, the plunger rod reciprocates to form negative pressure in the spray gun pump body to suck the spray liquid into the liquid outlet cavity, the nozzle does not discharge liquid, and the pressure stabilizer in the pressure stabilizing cavity closes the connection port of the pressure stabilizing cavity and the liquid outlet cavity;
s2, after the liquid outlet cavity is filled with spraying liquid, the spraying liquid extrudes the pressure stabilizer to form pressure to drive the pressure stabilizer to move, the spraying liquid enters the pressure stabilizing cavity and enters a liquid storage space communicated with the liquid outlet cavity, the spraying liquid is sprayed out from a nozzle on one side of the liquid outlet cavity, and the pressure stabilizer generates stable pressure on the spraying liquid in the liquid outlet cavity to ensure that the nozzle continuously sprays the spraying liquid;
s3, the spray gun is turned off, the spraying liquid in the liquid outlet cavity is reduced, the pressure in the liquid outlet cavity is reduced, and the voltage stabilizer moves to the position of the original liquid storage space.
Step S1 of the present invention is specifically that the spray gun is started, and the plunger rod reciprocates to form negative pressure in the liquid inlet cavity of the spray gun. When the plunger rod draws liquid back, the coating is sucked into the liquid inlet cavity, and at the moment, the ball valve of the liquid inlet cavity is pushed open by the coating. And the plunger rod pushes the coating to jack the anti-backflow ball valve into the liquid outlet cavity, the ball valve of the liquid inlet cavity is pressed by the spring to close the connecting port for communicating the liquid inlet cavity with the coating, the nozzle does not discharge liquid, and the pressure stabilizer in the pressure stabilizing cavity closes the connecting port for communicating the pressure stabilizing cavity with the liquid outlet cavity.
Step S2 of the present invention is specifically that S2 rotates the air-out knob to discharge air in the pump body through the nozzle, and after the liquid-out cavity is filled with liquid, the air-out knob is screwed to perform trial spraying, which is an adjustment stage. Because the liquid inlet volume is greater than the liquid outlet volume, the piston of the pressure stabilizer is extruded and driven to move by the un-sprayed coating in the pump body, the spraying liquid enters the liquid storage space communicated with the liquid outlet cavity in the pressure stabilizing cavity, and the first spring also generates pressure on the coating. The movement of the plunger rod comprises a liquid feeding part and a liquid sucking part, when the plunger rod sucks liquid, the coating loses a power source, and at the moment, pressure generated by extrusion of the coating in the pressure stabilizing cavity by a spring in the pressure stabilizer is used as a staged power source to make up for lost power neutral gear when the plunger rod sucks liquid. The continuous paint spraying of the nozzle is ensured.
Compared with the prior art, the invention has the beneficial effects that:
1. the pressure stabilizer is arranged, so that a stable and continuous spraying pressure in the spraying process is ensured, the spraying effect is further ensured, the dripping phenomenon of subsequent spray nozzle spraying is avoided, and a user can adjust the pressure stabilizer according to actual requirements according to the size of a storage and circulation space corresponding to the pressure stabilizer;
2. through the arrangement of the exhaust knob at the nozzle end, the gas in the liquid outlet cavity can be quickly discharged through manually adjusting the exhaust knob, so that the phenomena of poor early-stage spraying effect and large particles of the sprayed surface coating are reduced;
3. the eccentric bearing assembly is utilized to drive the plunger rod to reciprocate, compared with the traditional electromagnet driving mode, the vibration of the spray gun is greatly reduced, meanwhile, the noise is smaller, the use experience of a user is improved, and the pollution to the environmental noise is reduced;
4. through the arrangement of the strap type container bag, compared with a traditional spray gun which is directly provided with a liquid storage tank, the weight of the spray gun held by the hand is reduced, so that the spraying operation held by the arm is lighter and more convenient, the angle control and modulation are facilitated, the volume of spraying liquid stored by the human body in a back-carrying manner is larger, the liquid supplement does not need to be repeatedly detached and added in the spraying process, and the working efficiency in large-area spraying is improved;
5. the spray gun has the advantages of simple structure, convenient holding, convenient liquid supplement and disassembly, good spraying effect, no liquid dripping and leakage, and convenient and reliable use.
Drawings
FIG. 1 is a cross-sectional view of a high efficiency hand-held spray gun in one configuration;
FIG. 2 is a perspective view of a high efficiency hand held spray gun of one construction;
FIG. 3 is a cross-sectional view of a high efficiency hand-held spray gun of one construction;
FIG. 4 is a block diagram of the valve stem;
FIG. 5 is a block diagram of the vent knob;
FIG. 6 is a structural view of the drive mechanism;
FIG. 7 is a state diagram of the voltage regulator for performing a voltage regulation change;
FIG. 8 is a schematic view of an eccentric bearing assembly;
fig. 9 is a cross-sectional view of the eccentric bearing assembly.
In the figure: the device comprises a pump body 1, a nozzle 2, a nozzle shield 3, a voltage stabilizer 4, a first spring 5, a piston 6, an adjusting nut 7, a backflow through hole 8, an exhaust knob 9, a valve rod fixing sleeve 10, an anti-backflow valve seat 11, a second spring 12, a valve rod 13, a liquid outlet channel 131, an anti-backflow ball valve 14, a liquid inlet valve seat 15, a liquid inlet ball valve 16, a plunger rod 17, a plunger rod fixing sleeve 18, a copper sleeve 19, a high-molecular sealing element 20, an eccentric bearing assembly 21, an eccentric sleeve 22, a driving mechanism 23, a large gear 231, a small gear 232, a driving gear 233, a transmission gear 234, a motor 235, a connecting shaft 236, a bearing 237 and a fixing nut 237; the liquid-sucking device comprises a liquid outlet cavity 24, a liquid sucking cavity 25, a pressure stabilizing cavity 26, a liquid inlet pipeline 27, a liquid storage space 28, a bayonet 29, a liquid inlet 30, a limiting part 31, a bearing 32 and a bearing sleeve 33.
Detailed Description
The technical scheme of the invention is further described and illustrated by specific embodiments below, so that the invention is clearer and more obvious. Other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
Example 1
The embodiment discloses a high-efficiency spray gun, which comprises a pump body 1 and a nozzle 2, wherein a liquid outlet cavity 24 is arranged in the pump body, the nozzle 2 is arranged at one end of the pump body 1 along the length direction and is communicated with the liquid outlet cavity 24, a voltage stabilizer 4 is arranged on the pump body 1, and the position of the voltage stabilizer 4 is communicated with the liquid outlet cavity 24; the voltage stabilizer 4 is used for maintaining a stable spraying pressure on the spraying liquid in the liquid outlet cavity, and ensuring that the spraying liquid is continuously sprayed out by the nozzle.
Specifically, the pressure stabilizer 4 is arranged in a pressure stabilizing cavity 26 on the pump body 1, the pressure stabilizing cavity 26 is communicated with the liquid outlet cavity 24, the size of the liquid storage space of the liquid outlet cavity is controlled through the position change of the pressure stabilizer, and therefore when spraying liquid is filled into the liquid outlet cavity and then enters the pressure stabilizing cavity 26, the size of the liquid storage space can be adjusted according to the size of the hydraulic pressure.
A structure of a voltage stabilizer 4 is shown in figures 1-3, and comprises a telescopic mechanism, wherein the telescopic mechanism is arranged in a voltage stabilizing cavity 26, the telescopic mechanism blocks spraying liquid from entering a liquid inlet 30 of the voltage stabilizing cavity 26 from a liquid outlet cavity 24, the telescopic mechanism is extruded by the spraying liquid to be telescopic to adjust the size of a liquid storage space 28 of the spraying liquid entering the voltage stabilizing cavity from the liquid outlet cavity, namely the telescopic mechanism 41 is telescopic in the voltage stabilizing cavity, the liquid storage space 28 connected with the liquid outlet cavity 24 in the voltage stabilizing cavity 26 is reduced or enlarged, and the liquid storage space is used for storing redundant spraying liquid in the liquid outlet cavity 24.
The preferable structure of the telescopic mechanism comprises a first spring 5 and a piston 6 connected with the first spring 5, the top of a pressure stabilizing cavity of the first spring 5 is in top contact (the top of the pressure stabilizing cavity extrudes the first spring), and the bottom of the pressure stabilizing cavity is provided with a limiting part 31 for limiting the piston in the pressure stabilizing cavity.
The pressure stabilizer further comprises an adjusting part 7 which is detachably connected with the pump body 1 (such as in threaded connection or rotary connection) with the adjusting part 7, the adjusting part 7 is connected with the pump body 1 in a threaded manner, the adjusting part 7 is arranged at the top of the pressure stabilizing cavity, the adjusting part 7 is in contact with one end of the first spring 5 (the adjusting part extrudes the first spring to form a downward pressure on the first spring), a limiting part 31 (limiting the maximum position of the piston moving downwards in the pressure stabilizing cavity 26) for limiting the piston 6 in the pressure stabilizing cavity 26 is arranged at a liquid inlet 30 of the pressure stabilizing cavity 26, and the adjusting part 7 is used for adjusting the pressure of the first spring 5 connected with the piston due to the fact that the piston cannot move downwards in a limiting mode.
The pressurizer 4 is preferably arranged at the upper end of the pump body 1.
The following description is made in conjunction with the pressure values and the accompanying drawings:
because the liquid inlet of the spray gun depends on the reciprocating motion of the plunger rod 17, the spraying liquid is sucked into the spray gun and enters the liquid outlet cavity 24 when negative compaction is formed;
assuming that the first spring 5 exerts a pressure of 5mp on the piston 6 after being compressed, the pressure of the liquid in the liquid outlet chamber 24 needs to be more than 5mp to lift the piston;
the function of regulating part 7 is that after the spray gun has been used for a long time, the clearance between plunger rod 17 and polymer sealing member 20 will increase, and pressure will reduce, can't jack up piston 6 and form a steady voltage's a state. An adjusting part is properly adjusted;
the preset pressure of the first spring and the adjusting part is 5mp, namely the thread of the adjusting part is screwed downwards to the bottom, only 5mp is needed, and the pressure of the first spring cannot exceed 5mp, and the pressure of the first spring is adjusted to be small through the adjustment of the adjusting part.
One structure of the adjusting part 7 of this embodiment is an adjusting end cover, as shown in the figure, the one end of the first spring 5 is supported on the adjusting end cover, the adjusting end cover is connected with the upper end thread of the pump body 1, the adjusting end cover is rotated, the position of the adjusting end cover on the pump body is changed, and the pressure of the first spring 5 driven by the rotation of the adjusting end cover is changed because the lower end of the piston 6 is limited. The adjusting end cap is shown in threaded connection with the pump body 1 at the upper end of the surge chamber 26.
On the basis, the side wall of the pump body 1, which is located in the pressure stabilizing cavity 26, is provided with the backflow hole 8, that is, when the liquid outlet amount is smaller than the liquid inlet amount, so that the hydraulic pressure in the pump body is too large, the liquid storage space 28 is continuously enlarged, the piston continuously moves upwards to the position of the backflow hole 8, and the spraying liquid flows out from the backflow hole 8. Specifically, the hydraulic pressure is too high, the piston 6 is pushed by the liquid to move upwards to drive the first spring 5 to continue compressing, the piston 6 moves to the highest position to expose the backflow hole 8, the spraying liquid flows out of the backflow hole 8 into the storage device, and the spraying liquid is discharged through backflow to ensure stable pressure.
As shown in fig. 1-4, in this embodiment, a second spring 12 and a valve rod 13 are disposed in the liquid outlet cavity 24, a head of the valve rod 13 is located at the side of the anti-backflow ball valve 14, a rod body of the valve rod 13 faces the nozzle side, the second spring 12 is sleeved on the rod body, the head is provided with a liquid outlet channel 131 along the rod axis direction, and the spraying liquid pushes the anti-backflow ball valve 14 open and then pushes the head of the valve rod 13 open, and enters the liquid outlet cavity 24 from the liquid outlet channel 131. The liquid outlet channels may be provided as through holes such as grooves as shown in the figures. When the spray gun is started, spraying liquid is extruded to the ball valve 14, the ball valve 14 is pressed to jack the valve rod 13 open, the channel of the liquid outlet cavity 11 is opened, and the spraying liquid is sprayed from the nozzle 2.
One end, namely the head, of the valve rod 13 is arranged in the liquid outlet cavity 24 of the pump body 1, the other end of the valve rod is connected with the valve rod fixing sleeve 10, and the rear end of the valve rod fixing sleeve 10 is detachably connected with the pump body 1 (in the figure, in a threaded connection); the nozzle 2 is detachably connected with the front end of the valve rod fixing sleeve 10 (in the figure, threaded connection is adopted). Before the liquid inlet of the spray gun, in order to discharge air in the liquid cavity 24 conveniently, an exhaust knob 5 is arranged between the liquid cavity 24 and the nozzle 2 on the pump body 1 of the spray gun, the nozzle 2 is detachably connected with a valve rod fixing sleeve 10, and the exhaust knob 5 is detachably connected with the valve rod fixing sleeve 10 (shown in the figure as being connected with the groove 51 in a matching mode through a convex block 101). Referring to fig. 1, 2, 3 and 5, the exhaust principle of the exhaust knob is as follows:
1. the exhaust knob 5 is rotated, and the exhaust knob 5 and the valve rod fixing sleeve 10 are fixed, and the valve rod 13 and the valve rod fixing sleeve 10 are fixed, so that the valve rod fixing sleeve 10 is rotated from the pump body 1 by rotating the exhaust knob 5, and the nozzle 2 is driven to move at the same time, when the exhaust knob 5 rotates outwards, the valve rod 13 is driven to move outwards from the liquid outlet cavity 24 to the position of the valve rod head to be separated from the liquid outlet cavity wall, so that air in the liquid outlet cavity 24 is discharged and discharged from the nozzle 2;
2. when the exhaust is finished, the exhaust knob 5 is rotated inwards, the valve rod fixing sleeve 10 is screwed with the pump body 1, and the valve rod 13 moves into the liquid outlet cavity 24 until the head of the valve rod 13 is contacted with the liquid outlet cavity 24 (namely, the position shown in the figure).
Preferably, as shown in fig. 1-2, a push rod and a spring sleeved on the push rod may be further disposed between the ball valve 14 and the valve rod 13, and the transverse space of the section is disposed to leave a buffer passage for the spraying liquid to enter the pressure stabilizing cavity upwards. Spraying liquid is sucked into the pump body, then the ball valve 14 is pushed to move towards one side of the valve rod 13 to push away the valve rod 13, and the spraying liquid enters the liquid outlet cavity 24.
The electric spray gun is characterized in that a liquid suction cavity 25 is further arranged in the pump body 1, the liquid suction cavity 25, the liquid outlet cavity 24 and the nozzle 2 are sequentially arranged on the same axis, the anti-backflow ball valve 14 is arranged between the liquid suction cavity 25 and the liquid outlet cavity 24, and the communication and the closing of a channel are realized through the anti-backflow ball valve 14.
A linear pushing device is arranged in the liquid suction cavity 25, the linear pushing device moves in a reciprocating mode to push spraying liquid from the liquid suction cavity 25 to the anti-backflow ball valve 14, and when the preset pressure is reached, the anti-backflow ball valve 14 is opened to enter the liquid outlet cavity 24. The linear pushing device comprises a driving mechanism, an eccentric bearing assembly 21 and a plunger rod 17 which are sequentially arranged, wherein the driving mechanism drives the eccentric bearing assembly 21 to move, the eccentric bearing assembly 21 rotates to drive the plunger rod 17 to do linear reciprocating motion, negative pressure is formed in a liquid absorbing cavity 25, and after spraying liquid is sucked from the outside into the liquid absorbing cavity 25 and pushed to enter a liquid outlet cavity 24, the spraying liquid is finally sprayed out from a nozzle 2.
A plunger rod fixing sleeve 18 is arranged at the right end of the pump body 1, a copper sleeve 19 is arranged in the plunger rod fixing sleeve 18, and a plunger rod 17 penetrates through the copper sleeve 19 and extends into the liquid suction cavity 25 to perform internal reciprocating motion. In order to improve the sealing property and prevent the leakage of the spraying liquid, a sealing member 20 is provided at the joint of the copper sheath 19 and the liquid suction chamber 25, and preferably a polymer sealing member is used to improve the wear resistance.
Preferably, the driving mechanism 23 includes a motor 235, a driving gear 233, a transmission gear 234 and a connecting shaft 236, the driving gear 233 is sleeved on a main shaft of the motor 235, the driving gear 233 is engaged with the driven gear 234, the driven gear 234 drives the connecting shaft 236 to rotate, the other end of the connecting shaft 236 is connected with the eccentric bearing assembly 21, the eccentric bearing assembly 21 is connected with the plunger rod 17, and drives the eccentric bearing assembly to rotate so as to push the plunger rod 17 to make a linear reciprocating motion in the liquid suction cavity 25, thereby forming a negative pressure to realize liquid suction. Specifically, a large gear (loose wheel) 231 and a small gear 232 can be directly arranged on the connecting shaft 236 and the transmission gear to realize power transmission.
Each mechanism or component in this embodiment, such as the driving mechanism, can be adjusted according to different angular positions, such as being arranged on the left side, the upper side or the right side, and mainly achieves the purpose of driving the eccentric bearing assembly to rotate.
As shown in fig. 8-9, the eccentric bearing assembly 21 includes an eccentric sleeve 22, a bearing 32 and a bearing sleeve 33, the upper end of the eccentric sleeve 22 is connected to the connecting shaft 236, the lower end of the eccentric sleeve 22 is connected to the bearing 32, the side wall of the bearing sleeve 33 is connected to the plunger rod 17, and the width L1 of the inner ring of the bearing sleeve 33 along the axial direction of the plunger rod 17 is smaller than the width L2 perpendicular to the plunger rod 17. The driving mechanism drives the eccentric bearing assembly 21 to move, including the rotation of the connecting shaft 236 driving the bearing 32 and the linear reciprocating motion of the bearing sleeve 33 and the plunger rod 17 when the bearing 32 rotates in the bearing sleeve 33 and contacts the inner ring.
The driving mechanism 23 drives the eccentric sleeve 22 to rotate, the eccentric sleeve 22 drives the bearing 32 to rotate, and because the inner ring of the bearing sleeve 33 is not regular round, when the bearing 32 rotates along the axial direction of the plunger rod 17 when the inner ring of the bearing sleeve 33 rotates, the bearing 32 is in top contact with the inner ring of the bearing sleeve 33, the bearing sleeve 33 and the plunger rod 17 are pushed or far away towards one side of the liquid inlet cavity, and the reciprocating motion of the plunger rod 17 is realized; when the bearing 32 rotates to the direction perpendicular to the plunger rod 17 when the inner ring of the bearing sleeve 33 rotates, the bearing 32 does not contact with the inner ring of the bearing sleeve 33.
In a preferred embodiment, the difference in width of the inner ring of the bearing sleeve 33 can be realized by an elliptical inner ring, or by providing a bump or step on the inner wall of the bearing sleeve 33.
The narrow side of the inner ring of the bearing sleeve 33 is connected with the plunger rod 17, specifically, the narrow side is realized through a bayonet 29 with a circular side opening, and the plunger rod 17 is clamped with the bayonet 29.
The enclosed housing and the handle held thereby are provided on the exterior of the overall gun structure, preferably on the opposite side of the nozzle discharge direction, as is the side of the inlet chamber 25.
This spray gun still includes the stock solution bag of a knapsack formula, and the user can store a large amount of spraying liquid through the mode of knapsack, the stock solution bag pass through the drain pipe with 1 intercommunication of pump body for store spraying liquid. Specifically, a liquid inlet valve seat 15 is arranged on the pump body 1, two ends of a liquid inlet pipeline 27 in the liquid inlet valve seat 15 are respectively communicated with the liquid absorption cavity 25 and the liquid storage bag, and the driving mechanism drives the plunger rod 17 to move to form negative pressure so as to suck the spraying liquid from the liquid storage bag into the liquid absorption cavity 25. The reservoir bag is preferably made of a flexible and elastic material, so that the capacity can be expanded on the basis of the limited specification. A liquid inlet ball valve 16 is arranged in the liquid inlet pipeline 27 to avoid backflow.
Preferably, a hand-held portion is provided below the pump body 1 to facilitate holding by hand. The hand-held portion is preferably provided on the side of the drive mechanism.
For the spray angle control, the nozzle 2 may be provided with a nozzle guard 3 so that the spray angle of the spray liquid is within the divergent range of the trumpet shape of the nozzle guard 3.
The voltage stabilizer of the embodiment mainly plays a role in energy storage. When the motor of the driving mechanism is started, the exhaust nut is unscrewed, no pressure exists in each chamber of the pump body, only one exhaust process is carried out, and therefore the movement frequency of the plunger rod can be fast. When the spraying chamber is filled with liquid and the exhaust nut is screwed, the moving frequency of the plunger rod can reach a balance.
For ease of understanding, the principle of achieving the gun pressure stabilization is described in connection with the numerical values:
assume that the plunger rod pushing pressure is set to around 7 MP. Setting spraying pressure 5MP and liquid absorption 350mm2And liquid outlet amount of 200mm2Constant pressure stock solution volume 130mm2The ball valve is reset to the original position to bring the liquid return amount to 20mm2Thus, a balance is formed. The working frequency of the piston is consistent with that of the plunger rod;
the constant-pressure operation of the pressure stabilizer is carried out, when the plunger rod returns to suck liquid, no subsequent pressure supply exists in the pump body of the whole spray gun at this time, the pressure stabilizer provides pressure, the spraying pressure is ensured to be above 5MP, and the spray nozzle can continuously and smoothly discharge liquid.
Example 2
Different from the embodiment 1, the regulator 4 of the embodiment is a compression deformation member, such as an elastic block or an air bag, one end of the elastic block or the air bag and a limiting part 31 at the bottom of the pressure stabilizing cavity 26 are limited to block the liquid inlet 30 between the liquid outlet cavity 24 and the pressure stabilizing cavity 26, and the other end of the elastic block or the air bag is connected with the regulating member 7.
Deformation is generated through the compression of the elastic block or the air bag to increase the liquid storage space 28, so that excessive liquid in the liquid outlet cavity enters the liquid storage space, when the excessive liquid exceeds a preset pressure value, the deformation is maximum, the backflow hole is exposed, and the spraying liquid flows back into the storage bag.
Example 3
Corresponding to the high-efficiency handheld spray gun, the invention also provides a stable-pressure spraying method, which comprises the following steps:
s1, the spray gun starts to suck liquid, the spray liquid is sucked into the liquid outlet cavity, the spray nozzle does not discharge liquid, and the pressure stabilizer in the pressure stabilizing cavity blocks a connecting port which is communicated with the liquid outlet cavity in the pressure stabilizing cavity;
s2, after the liquid outlet cavity is filled with the spraying liquid, the liquid is continuously fed to enable the spraying liquid to extrude the voltage stabilizer to form pressure to drive the voltage stabilizer to move to open the connecting port, the spraying liquid enters the liquid storage space communicated with the liquid outlet cavity in the voltage stabilizer cavity, the spraying liquid is sprayed out from the nozzle on one side of the liquid outlet cavity, and the voltage stabilizer generates stable pressure on the spraying liquid in the liquid outlet cavity to ensure that the nozzle continuously sprays the spraying liquid;
s3, the spray gun is turned off, the spraying liquid in the liquid outlet cavity is reduced, the pressure in the liquid outlet cavity is reduced, and the voltage stabilizer moves to the position of the original liquid storage space.
In step S1, the method further includes an exhaust step including a liquid outlet chamber, wherein the exhaust knob is rotated to drive the valve rod to move from the liquid outlet chamber to the nozzle, so as to exhaust the gas in the liquid outlet chamber from the nozzle. And then the plunger rod reciprocates in the pump body to form negative pressure, and after the spraying liquid is sucked to fill the liquid outlet cavity, the redundant spraying liquid backs up the pressure stabilizer and enters a liquid storage space communicated with the pressure stabilizing cavity and the liquid outlet cavity.
In the process of S2, the operating frequency of the piston and the operating frequency of the plunger rod coincide. The plunger rod moves forwards to send liquid to the liquid outlet cavity; when the plunger rod moves backwards to suck liquid from the outside of the pump body, the pressure stabilizer provides pressure for spraying liquid in the liquid outlet cavity due to no pressure supply in the liquid outlet cavity, and the nozzle can continuously and smoothly discharge liquid.
The spraying liquid of this embodiment backs down the stabiliser for the stabiliser removes pressure stabilizing cavity upper end, pressure stabilizing cavity lower extreme is the stock solution space, specifically realize through a telescopic machanism's flexible, stretch out and draw back through a telescopic machanism with the pressure stabilizing intracavity setting of play liquid chamber intercommunication, telescopic machanism includes first spring and piston, first spring both ends respectively with pressure stabilizing cavity top, piston connection, the inlet that goes out the liquid chamber and be connected with pressure stabilizing cavity is plugged up to the piston when not starting, the piston receives hydraulic pressure to remove and opens the inlet and make first spring compression simultaneously, pressure stabilizing cavity is located the piston lower extreme and forms the stock solution space.
The pressure stabilization of the pressure stabilizer in the step S2 is realized by the pressure of the first spring, and the pressure of the first spring is adjusted by an adjusting part, specifically, by an adjusting part which is arranged at the upper end of the pressure stabilizing cavity and connected with the pump body. The adjusting part is preferably an adjusting end cover which is in threaded connection with the pump body, the first spring is connected with the adjusting end cover, and pressure to the first spring is controlled through the change of the rotating position of the adjusting end cover on the pump body (for example, the preset pressure value is fixed if the preset first spring pressure is 5mp, and the pressure of the first spring is reduced by screwing the adjusting end cover upwards out because the lower end piston is limited and cannot move downwards from the pressure stabilizing cavity).
In the method, the linear pushing device drives the plunger rod to reciprocate to extract liquid, the ball valve is pushed open or pulled back to the original position, the liquid pushes open the ball valve to enter the liquid suction cavity, and the pressure stabilizer stabilizes the pressure of the liquid suction cavity.
In the method, the linear thrustor drives the eccentric bearing assembly to rotate through the driving mechanism,
the eccentric bearing assembly drives the plunger rod to reciprocate in the liquid suction cavity.
Preferably, the driving mechanism is realized by matching a motor and a gear. The motor drives the gear to rotate, and the gear drives the eccentric bearing assembly to rotate through the shaft.
Preferably, the spray gun in the method absorbs liquid from the backpack type liquid storage bag, the backpack type design is convenient for storing spraying liquid with larger capacity, the spray gun is suitable for spraying operation with larger area, the force required by holding a human body is reduced, and the spraying angle of the spray gun is easier to control.
In the description of the present invention, it should be understood that the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in the embodiments do not limit the scope of the present invention. The directional or positional relationships, as indicated by directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the directional or positional relationships as shown in the drawings for ease of description and simplicity of description, and unless otherwise stated, are not intended to indicate and imply that the device or element so referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be considered as limiting the scope of the invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
The foregoing is only a preferred embodiment of the present invention and technical principles applied thereto, and does not limit the scope of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit and scope of the present disclosure.
Claims (5)
1. The utility model provides a high-efficient hand-held type spray gun, includes the pump body (1) and nozzle (2), be equipped with out sap cavity (24) in the pump body (1), nozzle (2) locate the pump body (1) along length direction one end and with go out sap cavity (24) intercommunication, its characterized in that: the pump also comprises a pressure stabilizer (4) arranged on the pump body (1), and the position of the pressure stabilizer (4) is communicated with the liquid outlet cavity (24); the pressure stabilizer is used for maintaining a stable spraying pressure on the spraying liquid in the liquid outlet cavity (24) and ensuring that the spraying liquid is continuously sprayed out of the nozzle (2); the pressure stabilizer (4) comprises a telescopic mechanism, a pressure stabilizing cavity (26) communicated with the liquid outlet cavity (24) is arranged in the pump body (1), the telescopic mechanism is arranged in the pressure stabilizing cavity (26), the telescopic mechanism blocks a liquid inlet (30) of spraying liquid entering the pressure stabilizing cavity (26) from the liquid outlet cavity (24), and the telescopic mechanism is extruded by the spraying liquid, is telescopically adjusted, and enters a liquid storage space (28) for storing the spraying liquid in the pressure stabilizing cavity (26) from the liquid outlet cavity (24); the telescopic mechanism comprises a first spring (5) and a piston (6) connected with the first spring (5), the first spring is in top contact with the top of the pressure stabilizing cavity (26), and the piston (6) at the lower part of the pressure stabilizing cavity (26) blocks the liquid inlet (30); the pressure stabilizer further comprises an adjusting part (7) in threaded connection with the pump body (1), the adjusting part (7) is arranged at the top of the pressure stabilizing cavity (26), the adjusting part (7) is in top contact with one end of the first spring (5), the liquid inlet (30) is provided with a limiting part (31) for limiting the piston (6) in the pressure stabilizing cavity (26), and the adjusting part (7) is used for adjusting the pressure of the first spring (5); the adjusting part (7) is an adjusting end cover; a liquid suction cavity (25) is further arranged in the pump body (1), the liquid suction cavity (25), the liquid outlet cavity (24) and the nozzle (2) are sequentially arranged on the same axis, and the liquid suction cavity (25) and the liquid outlet cavity (24) are communicated or closed through a ball valve (14); a linear pushing device is arranged in the liquid suction cavity (25), the linear pushing device moves in a reciprocating mode to push the spraying liquid from the liquid suction cavity (25) to the ball valve (14), and the ball valve (14) is pushed to enter the liquid outlet cavity (24); the linear pushing device comprises a driving mechanism (23), an eccentric bearing assembly (21) and a plunger rod (17) which are sequentially connected, the driving mechanism (23) drives the eccentric bearing assembly (21) to move, the eccentric bearing assembly (21) drives the plunger rod (63) to do linear reciprocating motion in the liquid suction cavity (25), negative pressure is formed in the liquid suction cavity (25), and spraying liquid is sucked from the outside of the pump body (1) into the liquid suction cavity (25) and pushed to enter the liquid outlet cavity (24) to be sprayed out from the nozzle (2).
2. A high efficiency hand held spray gun as claimed in claim 1, characterised in that the internal wall of the upper end of the pressure maintaining chamber (26) is provided with a return flow through hole (8).
3. A high-efficiency hand-held spray gun according to claim 1, characterized in that an exhaust knob (9) is arranged between the liquid outlet cavity (24) of the pump body (1) and the nozzle (2), and the exhaust knob (9) is detachably connected with the pump body (1) through a valve rod fixing sleeve (10); a valve rod (13) with one end extending out of the valve rod fixing sleeve (10) is arranged in the liquid outlet cavity (24).
4. A high efficiency hand held spray gun as claimed in claim 1 further comprising a backpack reservoir communicating with the pump body (1) via a drain.
5. A spray coating method using the high efficiency hand held spray gun of claim 1 comprising the steps of:
s1 the spray gun starts to suck liquid, the plunger rod reciprocates to form negative pressure in the spray gun pump body to suck the spray liquid into the liquid outlet cavity, the nozzle does not discharge liquid, and the pressure stabilizer in the pressure stabilizing cavity blocks the connecting port of the pressure stabilizing cavity and the liquid outlet cavity;
s2, after the liquid outlet cavity is filled with spraying liquid, the spraying liquid extrudes the pressure stabilizer to form pressure to drive the pressure stabilizer to move, the spraying liquid enters the pressure stabilizing cavity and enters a liquid storage space communicated with the liquid outlet cavity, the spraying liquid is sprayed out from a nozzle on one side of the liquid outlet cavity, and the pressure stabilizer generates stable pressure on the spraying liquid in the liquid outlet cavity to ensure that the nozzle continuously sprays the spraying liquid;
s3, the spray gun is turned off, the spraying liquid in the liquid outlet cavity is reduced, the pressure in the liquid outlet cavity is reduced, and the voltage stabilizer moves to the position of the original liquid storage space.
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| CN112974067B (en) * | 2020-04-07 | 2021-12-28 | 徐州斯普瑞喷涂有限公司 | Mechanical equipment with drip prevention and flocculation and accessory paint spraying device and using method |
| CN111330756A (en) * | 2020-04-17 | 2020-06-26 | 中船黄埔文冲船舶有限公司 | Spray gun for ship coating operation |
| CN112206448A (en) * | 2020-09-23 | 2021-01-12 | 诸佳枫 | Water spraying gun head capable of reducing noise to the maximum extent during water spraying |
| CN113499872B (en) * | 2021-09-13 | 2021-11-19 | 江苏双聚智能装备制造有限公司 | Coating nozzle with anti-dripping function |
| CN114832967B (en) * | 2022-07-04 | 2022-09-02 | 南通先佳精密模具有限公司 | Coating spray gun with spraying stabilizing device |
| CN116603657B (en) * | 2023-06-05 | 2023-10-20 | 浙江浩达工具制造股份有限公司 | Automatic adjust flush coater of flow |
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| CN110523557A (en) | 2019-12-03 |
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Address after: 321000 No. 1, Shuntian Road, Xiaoshun Town, Jindong District, Jinhua City, Zhejiang Province, China (Zhejiang) Pilot Free Trade Zone (Building 8, Xiaoshun Branch, Zhejiang Huafeng Power Tools Co., Ltd.) Patentee after: Jinhua yanchuang Technology Co.,Ltd. Address before: 322000 building 7, block B, Yingcai Pioneer Park, chuojiang street, Yiwu City, Jinhua City, Zhejiang Province Patentee before: Jinhua yanchuang Technology Co.,Ltd. |