CN211707285U

CN211707285U - Power device of glue-applying pump

Info

Publication number: CN211707285U
Application number: CN201922052760.8U
Authority: CN
Inventors: 屈钰钦; 付长生
Original assignee: Chongqing Hongguang Mechanical & Electrical Engineering Co ltd
Current assignee: Chongqing Hongguang Electromechanical Equipment Co ltd
Priority date: 2019-11-25
Filing date: 2019-11-25
Publication date: 2020-10-20
Anticipated expiration: 2029-11-25

Abstract

A power device of a glue-beating pump comprises a shell, a reversing valve, a micro valve I and a micro valve II; the shell is provided with an air inlet, the shell is internally provided with a cavity, a piston with a piston rod is movably arranged in the cavity, the diameter of the piston is matched with that of the cavity, and the piston rod extends out of the shell; the reversing valve is fixed on the shell and comprises a reversing valve sleeve, a reversing valve needle, a reversing valve upper needle cover and a reversing valve lower needle cover which are matched with the reversing valve sleeve; the micro valve I and the micro valve II respectively comprise a micro valve thimble, a micro valve piston, a return spring and a micro valve shell with a cavity I and a cavity II. The utility model discloses have following advantage: the automatic reversing device can reduce noise under the condition of realizing automatic reversing, and also realizes integration and modularization, so that the space utilization rate is improved by 20-40%.

Description

Power device of glue-applying pump

Technical Field

The utility model relates to a beat and glue the pump field, concretely relates to beat and glue pump power device.

Background

In the production process of modern automobiles, the use of various glues, such as structural glues for connection, sealing glues for sealing, vibration isolation glues for vibration isolation, etc., is becoming more and more common. The glue is coated on the automobile, so that the phenomena of noise, water seepage and the like of the automobile can be well reduced, and the quality of the whole automobile is improved.

In the gluing process of the workshop sealant, the outer plate part and the inner plate part are connected by wrapping the inner plate with the outer plate, and the sealant is coated on an outer plate laminating machine between the wrapping edges of the outer plate and the inner plate so as to ensure tight combination of the outer plate and the inner plate. In the gluing process of the automobile production line, the glue stock is guaranteed to be evenly and reasonably coated on the workpiece, and the quality of the finished automobile product can be greatly improved. With the improvement of the future consumption level, the requirement of consumers on the quality of the automobile is higher and higher, and the automobile body gluing process directly influences the quality of the whole automobile, so that the improvement of the gluing quality and efficiency of the automobile is imperative and vital in a certain time in the future.

At present, the manual gluing speed is low, the glue yield is difficult to realize accurate control, the problems of glue overflow, glue falling, glue breaking, uneven glue spreading and the like often occur, and the waste of auxiliary material cost and personnel working hours is caused. When the edge folding glue is coated, if the glue line has the defects of waves, different thicknesses and the like, the phenomena that the edge of the product is badly covered, the quality is affected, even the product is reworked and repaired and the like are easily caused. If glue overflows when welding, before adjusting the line on the car door, the glue needs to be wiped; after the car body is painted, if glue overflows, the glue is required to be shoveled and treated difficultly, which is labor-consuming and time-consuming; the adhesive is not uniform, so that the phenomena of insecure adhesion, adhesive pollution, adhesive leakage and the like occur after adhesion; when the sealant at the windshield is coated with glue, the defects of water leakage and the like of the windshield can be caused by the problems of glue falling, glue breaking, uneven glue coating amount and the like.

Based on the problems, the gluing equipment enters the sight of people, the gluing equipment cannot be separated from the gluing pump, and the purpose of sucking the glue from the glue barrel can be achieved through the up-and-down movement of the piston in the gluing pump. The pneumatic pump of SCA is generally adopted to the pump of gluing on the existing market, and the pneumatic pump of this SCA is great in the noise of operation in-process, and average noise is at 87 decibels, and its each gas circuit component dispersion is isolated, and space utilization is lower.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a compact structure beat and glue pump power device, it not only can be in the condition reduction low noise that realizes automatic switching-over, has still realized integrating, modularization for space utilization has improved 20% -40%.

The utility model aims to realize the purpose, and the power device of the glue pump comprises a shell, and a reversing valve, a micro valve I and a micro valve II which are arranged in the shell; the shell is provided with an air inlet, the shell is internally provided with a cavity, a piston with a piston rod is movably arranged in the cavity, the diameter of the piston is matched with that of the cavity, and one end of the piston rod extends out of the shell; the reversing valve comprises a reversing valve sleeve, a reversing valve needle, a reversing valve upper needle cover and a reversing valve lower needle cover which are matched with the reversing valve sleeve, wherein the reversing valve upper needle cover and the reversing valve lower needle cover are respectively fixed at the upper end and the lower end of the reversing valve needle; the micro valve I and the micro valve II are respectively fixed at the upper end and the lower end in the shell, the micro valve I and the micro valve II comprise micro valve ejector pins, micro valve pistons, reset springs and micro valve shells with cavities I and II, the cavities I and II are communicated through holes VI, the micro valve pistons are movably arranged in the cavities I, the diameters of the micro valve pistons are larger than those of the through holes VI and smaller than those of the cavities I, one end of each micro valve ejector pin extends into the cavity, the other end of each micro valve ejector pin penetrates through the cavities II and the through holes VI to be fixed with the micro valve pistons, and the reset springs are fixed between the tops of the cavities I and the micro valve pistons; air passages communicated with the air inlet and the through hole III, the air inlet and the cavity II of the micro valve I, the air inlet and the cavity II of the micro valve II, the cavity I of the micro valve I and the upper needle cover of the reversing valve, the cavity I of the micro valve II and the lower needle cover of the reversing valve, the through hole II and the top of the cavity, the through hole IV and the bottom of the cavity, the through hole I and the outside of the shell and the through hole V and the outside of the shell are respectively arranged.

In the utility model, when in use, gas is introduced from the air inlet on the shell and enters the reversing valve through the air passage between the air inlet and the through hole III, when the piston goes upward, the convex ring I and the convex ring II between the through hole IV and the through hole V, the convex ring I and the convex ring II between the through hole III and the through hole II correspond to ensure that the through hole IV and the through hole V do not communicate with each other, the through hole V does not enter and does not give out air, the gas entering the reversing valve from the through hole III enters the bottom of the cavity through the air passage between the through hole IV and the bottom of the cavity to ensure that the piston goes upward, and the gas in the cavity above the piston enters the reversing valve through the air passage between the through hole II and the top of the cavity and is discharged out of the shell through; when the piston is down, between I and II, protruding ring I and protruding ring II between III and IV correspond and make between I and II, do not ventilate between III and IV, through-hole I does not admit air nor give vent to anger, the gas that gets into the switching-over valve from III through-hole gets into the cavity top through the air flue between II and the cavity top and makes the piston down, the gas in the cavity below the piston gets into the switching-over valve through the air flue between IV and the cavity bottom after, it is outside to discharge the casing through the air flue between V and the casing outside through-hole.

The reversing valve is reversed by gas entering from an air passage between a cavity I of a micro valve I and an upper needle cover of the reversing valve or an air passage between a cavity I of a micro valve II and a lower needle cover of the reversing valve, and the reversing valve needle is pushed downwards or upwards, so that convex rings I and II between a through hole I and a through hole II, between a through hole III and the through hole II, between the through hole III and a through hole IV or between the through hole IV and the through hole V correspond to each other, the through hole I or the through hole V is sealed, the air inlet and outlet directions of the through hole I, the through hole II, the through hole IV and the through hole V on the reversing valve are changed, and the reversing valve is reversed. When a piston moves upwards to push a micro valve thimble of a micro valve I to move upwards, the micro valve piston of the micro valve I moves upwards to be separated from the bottom surface of a cavity I of the micro valve I, at the moment, gas entering from a gas inlet enters the cavity II of the micro valve I through a gas passage between the gas inlet and a cavity II of the micro valve I, then enters the cavity I of the micro valve I through a through hole VI of the micro valve I, and finally pushes the reversing valve thimble to move downwards through the gas passage between the cavity I of the micro valve I and a reversing valve upper needle cover, so that the reversing valve realizes reversing; when the piston pushes the micro valve ejector pin of the micro valve II downwards, the micro valve piston of the micro valve II descends and is separated from the bottom surface of the cavity I of the micro valve II, at the moment, gas entering from the gas inlet enters the cavity II of the micro valve II through the gas channel between the gas inlet and the cavity II of the micro valve II, then enters the cavity I of the micro valve II through the through hole VI of the micro valve II, and finally pushes the reversing valve ejector pin to move upwards through the gas channel between the cavity I of the micro valve II and the reversing valve lower needle cover, so that reversing of the reversing valve is realized. This beat and glue pump power device's switching-over valve, microvalve I and microvalve II all set up in the casing and are correlated with each other and independent, consequently realized integrating, modular design for the structure is compacter, space utilization is higher. In addition, the power device of the glue applying pump has smooth reversing in the running process, and the average noise is 70 decibels.

Due to the adoption of the technical scheme, the utility model discloses following advantage has: the automatic reversing device can reduce noise under the condition of realizing automatic reversing, and also realizes integration and modularization, so that the space utilization rate is improved by 20-40%. The average noise of the power device of the glue applying pump in the running process is 70 decibels.

Drawings

The drawings of the utility model are as follows:

fig. 1 is a schematic perspective view of a power device of a glue pump of the present invention;

fig. 2 is an internal perspective view of a power device of a glue pump of the present invention;

fig. 3 is a schematic bottom view of a power plant of a glue pump of the present invention;

FIG. 4 is a schematic cross-sectional view taken at A-A in FIG. 3;

FIG. 5 is a schematic cross-sectional view taken at B-B of FIG. 3;

FIG. 6 is a schematic perspective view of a reversing valve in a power device of a glue dispensing pump according to the present invention;

fig. 7 is a schematic cross-sectional view of a reversing valve in a power plant of a glue dispensing pump of the present invention;

FIG. 8 is an enlarged schematic view at A in FIG. 7;

FIG. 9 is a schematic perspective view of a microvalve I and a microvalve II of a glue pump power plant according to the present invention;

FIG. 10 is a schematic top view of a microvalve I of a glue pump power plant of the present invention;

FIG. 11 is a schematic cross-sectional view taken at C-C of FIG. 10;

fig. 12 is a schematic cross-sectional view of a micro valve pin and a micro valve piston of a power device of a glue pump according to the present invention.

In the figure: 1. the pneumatic reversing valve comprises a shell, 2, a reversing valve, 3, micro valves I, 4, micro valves II, 5, an air inlet, 6, a chamber, 7, a piston rod, 8, a piston, 9, a reversing valve sleeve, 10, a reversing valve needle, 11, a reversing valve upper needle cover, 12, a reversing valve lower needle cover, 13, through holes I, 14, through holes II, 15, through holes III, 16, through holes IV, 17, through holes V, 18, a convex ring I, 19, a convex ring II, 20, a micro valve thimble, 21, a micro valve piston, 22, a return spring, 23, a cavity I, 24, a cavity II, 25, through holes VI, 26, a pneumatic guide ring, 27, a base, 28, an upper shell, 29, a cylinder barrel, 30, a bulge, 31, a limiting ring, 32, a ring boss, 33, through holes VII, 34, a through hole VIII, 35, a cover plate, 36, a circular table part, 37, a fixing part and a lifting ring.

Detailed Description

The invention will be further explained with reference to the following figures and examples:

as shown in fig. 1 to 12, a power device of a glue-applying pump comprises a housing 1, and a reversing valve 2, a micro valve i 3 and a micro valve ii 4 which are arranged in the housing 1; an air inlet 5 is formed in the shell 1, a cavity 6 is formed in the shell 1, a piston 8 with a piston rod 7 is movably arranged in the cavity 6, the diameter of the piston 8 is matched with that of the cavity 6, and one end of the piston rod 7 extends out of the shell 1; the reversing valve 2 comprises a reversing valve sleeve 9, a reversing valve needle 10, a reversing valve upper needle cover 11 and a reversing valve lower needle cover 12 which are matched with the reversing valve sleeve 9, the reversing valve upper needle cover 11 and the reversing valve lower needle cover 12 are respectively fixed at the upper end and the lower end of the reversing valve needle 10, the reversing valve needle 10 is movably arranged in the reversing valve sleeve 9, the reversing valve sleeve 9 is sequentially provided with a through hole I13 and a through hole II 14 from bottom to top, the reversing valve sleeve 9 and the reversing valve needle 10 between the through hole I13 and the through hole II 14, between the through hole II 14 and the through hole III 15, between the through hole III 15 and the through hole IV 16 and between the through hole IV 16 and the through hole V17 are respectively provided with a convex ring I18 or a convex ring II 19, the convex ring I18 is fixed on the reversing valve sleeve 9 or the reversing valve needle 10 and corresponds to the convex ring II 19, and the convex ring II 19 is fixed on the reversing valve sleeve 9 or the reversing valve needle 10 and corresponds to the convex ring I18; the micro valve I3 and the micro valve II 4 are respectively fixed at the upper end and the lower end of the shell 1, the micro valve I3 and the micro valve II 4 respectively comprise a micro valve ejector pin 20, a micro valve piston 21, a return spring 22 and a micro valve shell with a cavity I23 and a cavity II 24, the cavity I23 and the cavity II 24 are communicated through a through hole VI 25, the micro valve piston 21 is movably arranged in the cavity I23, the diameter of the micro valve piston 21 is larger than that of the through hole VI 25 and smaller than that of the cavity I23, one end of the micro valve ejector pin 20 extends into the cavity 6, the other end of the micro valve ejector pin 20 penetrates through the cavity II 24 and the through hole VI 25 to be fixed with the micro valve piston 21, and the return spring 22 is fixed between the top of the cavity I23 and the micro valve piston; air passages communicated with the air inlet 5 and the through hole III 15, the air inlet 5 and the cavity II 24 of the micro valve I3, the air inlet 5 and the cavity II 24 of the micro valve II 4, the cavity I23 of the micro valve I3 and the reversing valve upper needle cover 11, the cavity I23 of the micro valve II 4 and the reversing valve lower needle cover 12, the through hole II 14 and the top of the cavity 6, the through hole IV 16 and the bottom of the cavity 6, the through hole I13 and the outside of the shell 1 and the through hole V17 and the outside of the shell 1 are respectively arranged.

In the utility model, during the use, let in gas from air inlet 5 on the casing 1, get into in the switching-over valve 2 through the air flue between air inlet 5 and the through-hole III 15, when piston 8 goes upward, protruding ring I18 and protruding ring II 19 between through-hole IV 16 and through-hole V17, between through-hole III 15 and the through-hole II 14 correspond and make between through-hole IV 16 and through-hole V17, through-hole III 15 and through-hole II 14 do not ventilate, through-hole V17 does not admit air nor give vent to anger, the gas that gets into switching-over valve 2 from through-hole III 15 gets into cavity 6 bottom through the air flue between through-hole IV 16 and cavity 6 bottom and makes piston 8 go upward, the gas in cavity 6 above piston 8 gets into switching-over valve 2 through the air flue between through-hole II 14 and cavity 6 top, discharge casing 1 outside through the air flue between through-hole I; when the piston 8 descends, the convex rings I18 and II 19 between the through hole I13 and the through hole II 14 and between the through hole III 15 and the through hole IV 16 are correspondingly enabled to be not ventilated between the through hole I13 and the through hole II 14 and between the through hole III 15 and the through hole IV 16, the through hole I13 does not admit air or exhaust air, the air entering the reversing valve 2 from the through hole III 15 enters the top of the cavity 6 through the air between the through hole II 14 and the top of the cavity 6 to enable the piston 8 to descend, and the air in the cavity 6 below the piston 8 enters the reversing valve 2 through the air passage between the through hole IV 16 and the bottom of the cavity 6 and is exhausted out of the shell 1 through the air passage between the through hole V17 and the outside of the shell 1.

The reversing valve 2 is reversed by means of gas entering from a gas passage between a cavity I23 of a micro valve I3 and a reversing valve upper needle cover 11 or a gas passage between a cavity I23 of a micro valve II 4 and a reversing valve lower needle cover 12, the reversing valve needle 10 is pushed downwards or upwards, so that convex rings I18 and II 19 between a through hole I13 and a through hole II 14, between a through hole III and a through hole II, between a through hole III and a through hole IV or between a through hole IV 16 and a through hole V17 correspond to each other, the through hole I13 or the through hole V17 is closed, the gas inlet and outlet directions of the through hole I13, the through hole II 14, the through hole IV 16 and the through hole V17 on the reversing valve 2 are changed, and the reversing valve 2 is reversed. When the piston 8 moves upwards to push the micro valve thimble 20 of the micro valve I3 to move upwards, the micro valve piston 21 of the micro valve I3 moves upwards to be separated from the bottom surface of the cavity I23 of the micro valve I3, at the moment, the gas entering from the gas inlet 5 enters the cavity II 24 of the micro valve I3 through a gas passage between the gas inlet 5 and the cavity II 24 of the micro valve I3, then enters the cavity I23 of the micro valve I3 through a through hole VI 25 of the micro valve I3, and finally the thimble of the reversing valve 2 is pushed to move downwards through the gas passage between the cavity I23 of the micro valve I3 and the upper needle cover 11 of the reversing valve, so that the reversing valve 2 realizes reversing; when the piston 8 pushes the micro valve ejector pin 20 of the micro valve II 4 downwards, the micro valve piston 21 of the micro valve II 4 downwards moves to be separated from the bottom surface of the cavity I23 of the micro valve II 4, at the moment, gas entering from the gas inlet 5 enters the cavity II 24 of the micro valve II 4 through a gas channel between the gas inlet 5 and the cavity II 24 of the micro valve II 4, then enters the cavity I23 of the micro valve II 4 through a through hole VI 25 of the micro valve II 4, and finally pushes the ejector pin of the reversing valve 2 to move upwards through the gas channel between the cavity I23 of the micro valve II 4 and the reversing valve lower needle cover 12, so that the reversing valve 2 realizes reversing. In the present embodiment, in order to improve the sealing performance when the male ring i 18 and the male ring ii 19 are fitted to each other, a seal ring is fixed to a contact surface of the male ring i 18 and the male ring ii 19. This beat and glue pump power device's switching-over valve, microvalve I and microvalve II all set up in the casing and are correlated with each other and independent, consequently realized integrating, modular design for the structure is compacter, space utilization is higher. In addition, the power device of the glue applying pump has smooth reversing in the running process, and the average noise is 70 decibels.

In this embodiment, the other positions of the housing 1 except the chamber 6 and the other components or parts are solid, and the air passages communicated between the air inlet 5 and the through hole iii 15, between the air inlet 5 and the cavity ii 24 of the micro valve i 3, between the air inlet 5 and the cavity ii 24 of the micro valve ii 4, between the cavity i 23 of the micro valve i 3 and the upper needle cover 11 of the reversing valve, between the cavity i 23 of the micro valve ii 4 and the lower needle cover 12 of the reversing valve, between the through hole ii 14 and the top of the chamber 6, between the through hole iv 16 and the bottom of the chamber 6, between the through hole i 13 and the outside of the housing 1, and between the through hole v 17 and the outside of the housing 1 are all duct openings directly formed at the solid part of the housing 1.

Further, as shown in fig. 4 and 5, a pneumatic guide ring 26 is fixed to the side of the piston 8. The pneumatic guide ring 26 is used for supporting the piston 8 to move, preventing the piston 8 from directly contacting and rubbing with the wall of the chamber 6 or the wall of the cylinder 29 in the moving process, and further protecting the wall of the chamber 6 or the wall of the cylinder 29 and the piston 8 from being damaged.

Further, as shown in fig. 1, 4 and 5, the housing 1 includes a base 27 and an upper shell 28 fixed on the base 27, a cylinder 29 is fixed in the chamber 6, and the piston 8 is movably disposed in the cylinder 29. The shell 1 comprises a base 27 and an upper shell 28 fixed on the base 27, so that the shell 1 can be conveniently processed and manufactured, and the processing cost of a die is reduced; a cylinder 29 is fixed in the chamber 6, and the piston 8 is movably arranged in the cylinder 29 and has the function of enabling the piston 8 to smoothly move up and down or downwards in the cylinder 29 under the conditions of facilitating the processing and manufacturing of the shell 1 and ensuring the air tightness of the shell 1.

Further, as shown in fig. 4 and 5, the top surface of the piston 8 and the bottom surface of the piston 8 are each provided with a projection 30. The top surface of the piston 8 and the bottom surface of the piston 8 are both provided with protrusions 30 for limiting the movement of the piston 8. The direct contact between the top surface of the piston 8 and the top surface of the chamber 6 can cause that static friction exists between the top surface of the piston 8 and the top surface of the chamber 6, gas is difficult to enter the upper part of the piston 8, the downward starting of the piston 8 is difficult, and the direct contact between the top surface of the piston 8 and the top surface of the chamber 6 after the piston 8 moves upwards is avoided by the bulge 30 on the top surface of the piston 8; the direct contact between the bottom surface of the piston 8 and the bottom surface of the chamber 6 causes the static friction between the bottom surface of the piston 8 and the bottom surface of the chamber 6, and the gas is difficult to enter the lower part of the piston 8, the piston 8 is difficult to start upwards, and the protrusion 30 on the bottom surface of the piston 8 prevents the bottom surface of the piston 8 from directly contacting the bottom surface of the chamber 6 after the piston 8 descends.

Further, as shown in fig. 4 and 5, the edge of the top surface of the piston 8 and the edge of the bottom surface of the piston 8 are provided with a retainer ring 31. The stopper ring 31 serves to improve the structural strength of the piston 8 while restricting the movement of the piston 8.

Further, as shown in fig. 1, 5, 9, 10 and 11, in order to reduce the manufacturing cost of the molds of the micro valve i 3 and the micro valve ii 4, a through hole vii 33 with a ring boss 32 is formed on the micro valve housing above the cavity i 23, a micro valve cover matched with the through hole vii 33 is arranged on the ring boss 32 in the through hole vii 33, a through hole viii 34 corresponding to the upper end of the micro valve piston 21 is formed on the micro valve cover, the return spring 22 is arranged in the through hole viii 34, the diameter of the through hole viii 34 is larger than or equal to the diameter of the upper end of the micro valve piston 21, and a cover plate 35 is fixed above the through hole vii 33.

Further, as shown in fig. 12, in order to increase the compactness of the microvalve i 3 and the microvalve ii 4, the microvalve piston 21 includes a circular table portion 36 and a fixing portion 37 fixed to the circular table portion 36, and the diameter of the fixing portion 37 matches the diameter of the through hole viii 34.

Further, the cover plate 35 is provided with a hole. The hole functions to communicate the outside air with the through hole viii 34. When the fixing part 37 of the micro valve piston 21 ascends to enter the through hole VIII 34 to compress the spring, gas in the micro valve flows out of the air outlet 39 to push the reversing valve 2 to reverse, the spring is reset after the reversing valve 2 reverses, the fixing part 37 of the micro valve piston 21 descends to enable the cavity I23 to be communicated with the through hole VIII 34, and at the moment, as the cover plate 35 is provided with the hole, external air is communicated with the through hole VIII 34, the gas in the micro valve finally enters the external air from the hole in the cover plate 35, the phenomenon that the pressure in the micro valve is too high due to the fact that the gas in the micro valve is too much is avoided, and danger is reduced. In other embodiments, the dangerous effect can be reduced by opening a hole in the air channel between the micro valve and the reversing valve 2 and then manually or automatically opening or closing the hole at regular time, so that excessive air in the micro valve can be prevented from causing excessive air pressure in the micro valve.

Further, as shown in fig. 4, in order to ensure the connection strength between the micro valve thimble 20 and the micro valve piston 21 in the micro valve i 3 and the micro valve ii 4, the micro valve thimble 20 is provided with a screw, the micro valve piston 21 is internally provided with a thread, and the thimble and the micro valve piston 21 are connected by the thread and the screw.

Further, as shown in fig. 1, 4 and 5, a hanging ring 38 is fixed on the housing for conveniently taking down and hanging the power device of the glue pump in the using process.

Claims

1. The utility model provides a beat and glue pump power device which characterized in that: comprises a shell (1), and a reversing valve (2), a micro valve I (3) and a micro valve II (4) which are arranged in the shell (1); an air inlet (5) is formed in the shell (1), a cavity (6) is formed in the shell (1), a piston (8) with a piston rod (7) is movably arranged in the cavity (6), the diameter of the piston (8) is matched with that of the cavity (6), and the piston rod (7) extends out of the shell (1);

the reversing valve (2) comprises a reversing valve sleeve (9), a reversing valve needle (10), a reversing valve upper needle cover (11) and a reversing valve lower needle cover (12) which are matched with the reversing valve sleeve (9), the reversing valve upper needle cover (11) and the reversing valve lower needle cover (12) are respectively fixed at the upper end and the lower end of the reversing valve needle (10), the reversing valve needle (10) is movably arranged in the reversing valve sleeve (9), the reversing valve sleeve (9) is sequentially provided with a through hole I (13), a through hole II (14), a through hole III (15), a through hole IV (16) and a through hole V (17) from bottom to top, the reversing valve sleeve (9) between the through hole I (13) and the through hole II (14), between the through hole II (14) and the through hole III (15), between the through hole III (15) and the through hole IV (16) and between the through hole IV (16), and the reversing valve needle (10) are respectively provided with a convex ring I (18) or a convex ring (19), the convex ring I (18) is fixed on the reversing valve sleeve (9) or the reversing valve needle (10) and corresponds to the convex ring II (19), and the convex ring II (19) is fixed on the reversing valve sleeve (9) or the reversing valve needle (10) and corresponds to the convex ring I (18);

the micro valve I (3) and the micro valve II (4) are respectively fixed at the upper end and the lower end of the shell (1), the micro valve I (3) and the micro valve II (4) comprise a micro valve thimble (20) and a micro valve piston (21), the miniature valve comprises a reset spring (22) and a miniature valve shell with a cavity I (23) and a cavity II (24), wherein the cavity I (23) is communicated with the cavity II (24) through a through hole VI (25), a miniature valve piston (21) is movably arranged in the cavity I (23), the diameter of the miniature valve piston (21) is larger than that of the through hole VI (25) and smaller than that of the cavity I (23), one end of a miniature valve thimble (20) extends into the cavity (6), the other end of the miniature valve thimble (20) penetrates through the cavity II (24) and the through hole VI (25) to be fixed with the miniature valve piston (21), and the reset spring (22) is fixed between the top of the cavity I (23) and the miniature valve piston (21);

air passages communicated with each other are arranged between the air inlet (5) and the through hole III (15), between the air inlet (5) and the cavity II (24) of the micro valve I (3), between the air inlet (5) and the cavity II (24) of the micro valve II (4), between the cavity I (23) of the micro valve I (3) and the upper needle cover (11) of the reversing valve, between the cavity I (23) of the micro valve II (4) and the lower needle cover (12) of the reversing valve, between the through hole II (14) and the top of the cavity (6), between the through hole IV (16) and the bottom of the cavity (6), between the through hole I (13) and the outside of the shell (1) and between the through hole V (17) and the outside of the shell (1).

2. A glue pump power plant as claimed in claim 1, characterised in that: a pneumatic guide ring (26) is fixed on the side surface of the piston (8).

3. A glue pump power plant according to claim 1 or 2, characterized in that: the shell (1) comprises a base (27) and an upper shell (28) fixed on the base (27), a cylinder (29) is fixed in the chamber (6), and the piston (8) is movably arranged in the cylinder (29).

4. A glue pump power plant according to claim 1 or 2, characterized in that: the top surface of the piston (8) and the bottom surface of the piston (8) are both provided with bulges (30).

5. A glue pump power plant as claimed in claim 3, characterised in that: the top surface of the piston (8) and the bottom surface of the piston (8) are both provided with bulges (30).

6. A glue pump power plant according to claim 1, 2 or 5, characterized in that: the edge of the top surface of the piston (8) and the edge of the bottom surface of the piston (8) are both provided with a limiting ring (31).

7. A glue pump power plant as claimed in claim 3, characterised in that: the edge of the top surface of the piston (8) and the edge of the bottom surface of the piston (8) are both provided with a limiting ring (31).

8. A power device of a glue spraying pump according to claim 4, characterized in that: the edge of the top surface of the piston (8) and the edge of the bottom surface of the piston (8) are both provided with a limiting ring (31).

9. A glue pump power plant as claimed in claim 1, 2, 5, 7 or 8, wherein: above the cavity I (23), a through hole VII (33) with a ring boss (32) is formed in the micro valve shell, a micro valve cover matched with the through hole VII (33) is arranged on the ring boss (32) in the through hole VII (33), a through hole VIII (34) corresponding to the upper end of the micro valve piston (21) is formed in the micro valve cover, a reset spring (22) is arranged in the through hole VIII (34), the diameter of the through hole VIII (34) is larger than or equal to that of the upper end of the micro valve piston (21), and a cover plate (35) is fixed above the through hole VII (33).

10. A glue pump power plant as claimed in claim 3, characterised in that: above the cavity I (23), a through hole VII (33) with a ring boss (32) is formed in the micro valve shell, a micro valve cover matched with the through hole VII (33) is arranged on the ring boss (32) in the through hole VII (33), a through hole VIII (34) corresponding to the upper end of the micro valve piston (21) is formed in the micro valve cover, a reset spring (22) is arranged in the through hole VIII (34), the diameter of the through hole VIII (34) is larger than or equal to that of the upper end of the micro valve piston (21), and a cover plate (35) is fixed above the through hole VII (33).

11. A power device of a glue spraying pump according to claim 4, characterized in that: above the cavity I (23), a through hole VII (33) with a ring boss (32) is formed in the micro valve shell, a micro valve cover matched with the through hole VII (33) is arranged on the ring boss (32) in the through hole VII (33), a through hole VIII (34) corresponding to the upper end of the micro valve piston (21) is formed in the micro valve cover, a reset spring (22) is arranged in the through hole VIII (34), the diameter of the through hole VIII (34) is larger than or equal to that of the upper end of the micro valve piston (21), and a cover plate (35) is fixed above the through hole VII (33).

12. A power device of a glue spraying pump according to claim 6, characterized in that: above the cavity I (23), a through hole VII (33) with a ring boss (32) is formed in the micro valve shell, a micro valve cover matched with the through hole VII (33) is arranged on the ring boss (32) in the through hole VII (33), a through hole VIII (34) corresponding to the upper end of the micro valve piston (21) is formed in the micro valve cover, a reset spring (22) is arranged in the through hole VIII (34), the diameter of the through hole VIII (34) is larger than or equal to that of the upper end of the micro valve piston (21), and a cover plate (35) is fixed above the through hole VII (33).

13. A glue pump power plant as claimed in claim 9, characterised in that: the micro valve piston (21) comprises a circular table part (36) and a fixing part (37) fixed on the circular table part (36), and the diameter of the fixing part (37) is matched with that of the through hole VIII (34).

14. A glue pump power plant according to claim 10, 11 or 12, characterised in that: the micro valve piston (21) comprises a circular table part (36) and a fixing part (37) fixed on the circular table part (36), and the diameter of the fixing part (37) is matched with that of the through hole VIII (34).