Constant pressure valve mechanism of multi-component gluing nozzle

Abstract

The invention relates to the technical field of mixed gluing equipment, in particular to a constant pressure valve mechanism of a multi-component gluing sprayer, which comprises a center body, a mixing cavity is fixedly mounted at the bottom end of the center body, a stirring shaft is arranged in the center of the center body, and the center body is used for driving the stirring shaft to rotate and pull up and down; the feeding module is composed of a plurality of feeding valves which are symmetrically distributed at the bottom end of the center body, feeding ports and discharging ports are formed in valve bodies of the feeding valves, and the discharging ports are communicated with the interior of the mixing cavity through pipelines. By the adoption of the technical scheme, after the stirring shaft evenly stirs materials in the mixing cavity, the stirring shaft is pulled up and down, so that the purpose of spraying out the materials is achieved, and the feeding amount can be controlled by controlling the pulling distance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mixed gluing equipment, in particular to a constant pressure valve mechanism of a multi-component gluing nozzle. BACKGROUND

[0002] The gluing machine is used for extruding and spraying glue on the surface of the base material to form a required shape pattern. In the prior art, a hot shrinkage middle wall pipe full gluing special gluing pipe disclosed in application No. CN202022929965.2 includes a gluing pipe, a connecting pipe is arranged on one side of the gluing pipe, the gluing pipe and the connecting pipe are fixedly connected through a connecting piece, convex rings are arranged on the outer surfaces of the gluing pipe and the connecting pipe, a groove is formed in the inner surface of the connecting piece, ear plates are arranged on the two sides of the connecting piece, and threaded holes are formed in the surfaces of the ear plates. However, the gluing pipe mentioned in the prior art cannot mix and spray multi-component glue, lacks the mixing function, and the glue may be broken during spraying, which cannot meet the requirements of high-precision glue spraying.

[0003] Therefore, it is particularly necessary to solve how to mix the materials by the structure arranged in the nozzle during spraying to realize the mixed coating of A and B materials. SUMMARY

[0004] The purpose of the present application is to provide a constant pressure valve mechanism of a multi-component gluing nozzle to solve the problems existing in the prior art.

[0005] The above technical purpose of the present application is achieved by the following technical scheme: A constant pressure valve mechanism of a multi-component gluing nozzle, comprising: a center body, a mixing cavity is fixedly installed at the bottom end of the center body, a stirring shaft is arranged at the center position of the center body, and the center body is used for driving the stirring shaft to rotate and pull up and down; and a feeding module composed of a plurality of feeding valves symmetrically arranged at the bottom end of the center body, an inlet and an outlet are arranged on the valve body of the feeding valve, and the outlet is communicated with the inside of the mixing cavity through a pipeline.

[0006] By adopting the above technical scheme, the materials in the mixing cavity are stirred uniformly by the stirring shaft, then the stirring shaft is pulled up and down, so that the materials are sprayed out, and the feeding amount can be controlled by controlling the pulling distance.

[0007] In further embodiments, the center body includes an outer shell, a first striking rod, a second striking rod, a piston rod, a limiting rod, a return spring, and a plug; The top middle area of the shell is provided with a first circular hole penetrating from top to bottom, the top end of the stirring shaft is arranged in the shaft hole, and the diameter of the top end of the stirring shaft is greater than that of the first circular hole; the front side of the top end of the shell is provided with a second circular hole penetrating from front to back, and the two second circular holes are symmetrically arranged about the axis of the stirring shaft; the rear ends of the two stirring shafts are communicated with the first circular hole; the bottom middle area of the shell is provided with a positioning blind hole, the axis of the positioning blind hole is parallel to the axis of the stirring shaft, the rear side of the positioning blind hole is not communicated with the front side of the first circular hole, and the top end of the positioning blind hole is communicated with the two second circular holes; A piston cylinder is fixedly installed in the inner middle position of the positioning blind hole, the top end and the bottom end of the piston cylinder are completely open, the top end of the plug is inserted into the inner bottom end of the piston cylinder, the bottom end of the plug is detachably connected with the shell through bolts, the bottom end of the piston rod is located in the inner top end of the piston cylinder, and the bottom end of the piston rod is coaxial with the top end of the piston cylinder; the bottom end of the piston rod is provided with a piston disc, the piston disc is slidingly installed in the inner top end of the piston cylinder, the top end of the limiting rod is fixedly connected with the inner top of the positioning blind hole, and the limiting rod is coaxial with the positioning blind hole; the top of the piston rod is provided with a first shaft hole, and the bottom end of the first shaft hole does not penetrate the piston rod; the reset spring is coaxially arranged in the inside of the positioning blind hole, the top end of the reset spring is in abutment with the top of the positioning blind hole, the bottom of the reset spring is in abutment with the inner bottom of the first shaft hole of the piston rod, the outer diameter of the reset spring is in clearance fit with the inner diameter of the first shaft hole, and the inner diameter of the reset spring is in clearance fit with the diameter of the limiting rod; the limiting rod is used for guiding the contraction direction of the top end of the reset spring; The first and second beaters have consistent structural sizes, the first and second beaters are arranged in the second circular holes on the left and right sides respectively, and the axes of the first and second beaters are parallel to the axes of the second circular holes; the first beater is sequentially provided with a first cylindrical part, a second cylindrical part, a cam part, a third cylindrical part, a gear part, a fourth cylindrical part, a fifth cylindrical part and a rectangular part from front to back along the axial direction; a positioning sleeve is slidingly installed on the inner top end of the first circular hole, the positioning sleeve is sleeved on the top end of the stirring shaft, the top and bottom of the positioning sleeve are completely open, the bottom end of the positioning sleeve is provided with a downward protrusion symmetrically on the left and right sides, the bottom end surface of the protrusion is matched with the cam part, the top end of the piston rod is provided with a rack surface symmetrically on the left and right sides, the length direction of the rack surface is upward and downward, the gear part is meshed with the rack surface, a first bearing is sleeved on the first cylindrical part, the first bearing is fixedly installed on the inner rear end of the second circular hole, a second bearing is sleeved on the fifth cylindrical part, the second bearing is fixedly installed on the inner front end of the second circular hole, the front side of the shell is provided with an air inlet hole, the air inlet hole is communicated with the inside of the piston cylinder, and the bottom end of the piston cylinder is provided with a via hole corresponding to the air inlet hole.

[0008] By adopting the technical scheme, the positioning blind hole, the piston rod, the piston cylinder and the piston disc are coaxially arranged, when air is sent into the interior of the piston cylinder through the via hole and the air inlet hole, the piston rod moves upward, the rack surface is engaged with the gear part, so that the gear part rotates, thereby driving the cam part to rotate, the cam part rotates to a certain position and strikes upward the protrusion at the bottom end of the positioning sleeve, because the positioning sleeve is fixedly connected with the stirring shaft, the stirring shaft moves upward, thereby realizing the up-down movement of the stirring shaft.

[0009] In a further embodiment, the top of the central body is fixedly provided with a support sleeve and a mounting seat, the bottom of the mounting seat is provided with an avoiding groove avoiding the support sleeve, the top of the mounting seat is fixedly provided with a driving motor, the top of the stirring shaft is provided with a rectangular protrusion integrally formed with the stirring shaft, the top of the stirring shaft is fixedly provided with a coaxial locking nut, the bottom end of the support sleeve is provided with a third bearing, the outer ring of the third bearing is fixedly arranged at the inner top of the first circular hole, the inside of the support sleeve is provided with a centripetal stop lever, one side of the locking nut is provided with an upward-downward penetrating groove, the stop lever is located in the groove, the output shaft of the driving motor is fixedly connected with the top end of the support sleeve through the mounting seat, the driving motor is used for driving the axial rotation of the support sleeve, and the support sleeve, the locking nut and the stirring shaft are coaxially arranged.

[0010] By adopting the technical scheme, because the inside of the support sleeve is provided with a fixed-position stop lever and the stop lever is located in the groove of the locking nut, when the support sleeve rotates, the stop lever cannot leave the inside of the groove, so the locking nut also rotates axially, at this time, the locking nut and the stirring shaft are fixed and coaxial, so the stirring shaft also rotates, and because the groove of the locking nut is upward-downward penetrating, the stirring shaft is upward-downward movable, through the arrangement of the scheme, the upward-downward movement and rotation of the stirring shaft do not interfere with each other, and multi-directional control of the stirring shaft is realized.

[0011] In a further embodiment, the stirring shaft is sequentially provided with a rectangular protrusion, a first circular rod part, a second circular rod part, a third circular rod part, a fourth circular rod part, a fifth circular rod part, a sixth circular rod part and a seventh circular rod part from top to bottom along the axial direction, the diameters of the first circular rod part, the third circular rod part and the sixth circular rod part are consistent, the diameters of the second circular rod part and the fourth circular rod part are consistent, the diameters of the second circular rod part and the fourth circular rod part are smaller than that of the first circular rod part, the diameter of the seventh circular rod part is smaller than that of the second circular rod part, the diameter of the fifth circular rod part is larger than that of the first circular rod part, the first circular rod part is provided with a threaded surface, the first circular rod part is sequentially screwed with a first nut and a second nut from top to bottom, the top end of the third circular rod part is provided with a compression ring, and the bottom end of the third circular rod part is provided with a fifth bearing, the locking nut is provided on the fifth bearing, and the positioning sleeve is provided at the bottom end of the locking nut.

[0012] By adopting the technical scheme, the positioning sleeve and the compression ring cooperate to firmly limit the lock nut at the top end of the stirring shaft.

[0013] In a further embodiment, the top of the lock nut is provided with a limiting ring, the fiber ring is coaxial with the lock nut, the bottom of the limiting ring is attached to the top of the lock nut, the top of the limiting ring is provided with a compression spring coaxial with the limiting ring, and the top end of the compression spring is in abutment with the inner top of the mounting seat.

[0014] By adopting the technical scheme, the compression spring can exert a downward reset force on the stirring shaft, so that the position change of the stirring shaft can be reset more quickly.

[0015] In a further embodiment, the inner top of the mounting seat is screwed with a limiting nut, the top of the compression spring is attached to the bottom of the limiting nut, and by adjusting the height position of the limiting nut inside the mounting seat, the compression spring is in different compression lengths, so as to facilitate the adjustment of the reset force exerted by the compression spring on the stirring shaft.

[0016] In a further embodiment, the lock nut is sequentially provided with a first circular ring portion, a second circular ring portion, a third circular ring portion and a fourth circular ring portion from top to bottom along the axial direction, the groove is arranged on the side surface of the first circular ring portion, the groove penetrates the first circular ring portion from top to bottom, the diameter of the first circular ring portion is greater than the diameter of the second circular ring portion, the diameter of the second circular ring portion is greater than the diameter of the third circular ring portion, the diameter of the third circular ring portion is less than the diameter of the fourth circular ring portion, and the diameter of the fourth circular ring portion is less than the diameter of the second circular ring portion. The cross section of the XY plane of the positioning sleeve is rectangular, and the left and right two side surfaces of the positioning sleeve are both required to be arranged as arc surfaces, the top center position of the positioning sleeve is provided with a mounting circular hole penetrating from top to bottom, and the top end of the first circular hole is arranged as a shape conforming to the outer wall of the positioning sleeve.

[0017] By adopting the technical scheme, because the positioning sleeve has front and back two planes, and the top end of the first circular hole is arranged as a shape conforming thereto, the top end of the first circular hole is arranged in a mode of being attached (gap fit) to the front and back and left and right four side walls of the positioning sleeve, so as to realize the limitation of the up and down sliding direction of the positioning sleeve.

[0018] In a further embodiment, the top of the mixing cavity is provided with a through hole for penetrating the bottom end of the stirring shaft, the through hole is provided with an oil seal, the oil seal is used to seal the gap between the stirring shaft and the through hole, and the bottom of the mixing cavity is provided with a discharge hole.

[0019] By adopting the technical scheme, the oil seal avoids the overflow of the material from the gap between the stirring shaft and the through hole.

[0020] In summary, the present application has the following beneficial effects: 1. After the material inside the mixing cavity is stirred uniformly by the stirring shaft, the stirring shaft is pulled up and down to realize the purpose of spraying the material, and the feeding amount can be controlled by controlling the pulling distance. The present scheme enables the stirring shaft to receive the rotating power of the driving motor and to vertically displace under the control of the positioning sleeve, thereby realizing accurate adjustment of the stirring depth (the pressure inside the piston cylinder can be better controlled because the pressure spring at the top exerts pressure). This structural design is particularly suitable for processing glue with different viscosities, and the stirring depth and intensity can be adjusted according to the characteristics of the glue, thereby significantly improving the mixing uniformity and the glue coating quality. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is the overall structure schematic diagram of the present application; Figure 2 is the structure schematic diagram of the center body for embodying the present application; Figure 3 is the connection schematic diagram of the structure related to the piston rod for embodying the present application; Figure 4 is the structure schematic diagram of the stirring shaft inside the shell for embodying the present application; Figure 5 is the structure schematic diagram of the first beating rod for embodying the present application; Figure 6 is the connection relationship schematic diagram of various components provided on the stirring shaft for embodying the present application; Figure 7 is the structure schematic diagram of the positioning sleeve for embodying the present application; Figure 8 is the structure schematic diagram of the entire center body for embodying the present application; Figure 9 is the structure schematic diagram of the feeding valve of the feeding block for embodying the present application; Figure 10 is the structure schematic diagram of the inside of the mixing cavity for embodying the present application.

[0022] In the diagram, 100 is the central body; 110 is the outer shell; 120 is the first striking rod; 121 is the first cylindrical part; 122 is the second cylindrical part; 123 is the cam part; 124 is the third cylindrical part; 125 is the gear part; 126 is the fourth cylindrical part; 127 is the fifth cylindrical part; 128 is the rectangular part; 130 is the second striking rod; 140 is the piston rod; 141 is the piston cylinder; 142 is the piston disc; 145 is the rack surface; 150 is the limiting rod; 160 is the return spring; 170 is the plug; 200 is the mixing chamber; 300 is the stirring shaft; 301 is the positioning sleeve; 30 2. Rectangular protrusion; 303. First round rod portion; 304. Second round rod portion; 305. Third round rod portion; 306. Fourth round rod portion; 307. Fifth round rod portion; 308. Sixth round rod portion; 309. Seventh round rod portion; 400. Feeding module; 500. Support sleeve; 600. Mounting base; 700. Drive motor; 800. Locking nut; 101. First round hole; 102. First sleeve; 103. First oil seal; 104. Sealing plate; 105. First return spring; 106. First cylinder; 501. Second sleeve; 502. Second oil seal. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings.

[0024] Identical parts are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to the attached figures. Figure 1 In this specification, the terms "bottom surface" and "top surface," "inner" and "outer" refer to the direction toward or away from the geometry of a specific component. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this specification, "a plurality of" means two or more, unless otherwise explicitly and specifically defined by the direction of the center.

[0025] Example 1: like Figures 1-9 As shown, a constant pressure valve mechanism for a multi-component adhesive spray nozzle includes: a central body 100, a mixing chamber 200 fixedly installed at the bottom end of the central body 100, and a stirring shaft 300 arranged at the center of the central body 100. The central body 100 is used to drive the stirring shaft 300 to rotate and move up and down. And the feeding module 400, the feeding module 400 is composed of a plurality of feeding valves symmetrically distributed at the bottom end of the central body 100, the valve body of the feeding valve is provided with an inlet and an outlet, the outlet is communicated with the inside of the mixing cavity 200 through a pipeline; the central body 100 includes a shell 110, a first punch 120, a second punch 130, a piston rod 140, a limiting rod 150, a return spring 160 and a plug 170.

[0026] As shown in Figures 1-9 The top middle area of the shell 110 is provided with a first circular hole penetrating upward and downward, the top end of the stirring shaft 300 is inserted into the shaft hole, and the diameter of the top end of the stirring shaft 300 is greater than the diameter of the first circular hole; the front side of the top end of the shell 110 is provided with a second circular hole penetrating forward and backward, and the two second circular holes are symmetrically arranged about the axis of the stirring shaft 300; the rear ends of the two stirring shafts 300 are communicated with the first circular hole; the bottom middle area of the shell 110 is provided with a positioning blind hole, and the axis of the positioning blind hole is parallel to the axis of the stirring shaft 300; the rear side of the positioning blind hole is not communicated with the front side of the first circular hole, and the top end of the positioning blind hole is communicated with the two second circular holes; The inside of the positioning blind hole is fixedly installed with a piston cylinder 141, the top end and the bottom end of the piston cylinder 141 are completely open, the top end of the plug 170 is inserted into the inner bottom end of the piston cylinder 141, the bottom end of the plug 170 is detachably connected with the shell 110 through bolts, the bottom end of the piston rod 140 is located at the inner top end of the piston cylinder 141, and the bottom end of the piston rod 140 is coaxial with the top end of the piston cylinder 141; the bottom end of the piston rod 140 is provided with a piston disc 142, the piston disc 142 is slidingly installed at the inner top end of the piston cylinder 141, the top end of the limiting rod 150 is fixedly connected with the inner top of the positioning blind hole, and the limiting rod 150 is coaxial with the positioning blind hole; the top of the piston rod 140 is provided with a first shaft hole, and the bottom end of the first shaft hole does not penetrate the piston rod 140; the return spring 160 is coaxially arranged in the inside of the positioning blind hole, and the top end of the return spring 160 abuts against the top of the positioning blind hole; the bottom of the return spring 160 abuts against the inner bottom of the first shaft hole of the piston rod 140, the outer diameter of the return spring 160 is clearance-fitted with the inner diameter of the first shaft hole, and the inner diameter of the return spring 160 is clearance-fitted with the diameter of the limiting rod 150; the limiting rod 150 is used for guiding the contraction direction of the top end of the return spring 160.

[0027] As shown in Figures 1-9As shown, the structural size of the first and second beaters 120 and 130 is consistent, the first and second beaters 120 and 130 are arranged in the second circular holes on the left and right sides respectively, and the axes of the first and second beaters 120 and 130 are parallel to the axes of the second circular holes; the first beater 120 is sequentially arranged from front to back along the axial direction as a first cylindrical part 121, a second cylindrical part 122, a cam part 123, a third cylindrical part 124, a gear part 125, a fourth cylindrical part 126, a fifth cylindrical part 127 and a rectangular part 128; a positioning sleeve 301 is slidably arranged on the inner top end of the first circular hole, the positioning sleeve 301 is sleeved on the top end of the stirring shaft 300, the top and bottom of the positioning sleeve 301 are completely open, the bottom end of the positioning sleeve 301 is symmetrically provided with a downward protrusion, the bottom end face of the protrusion is matched with the cam part 123, the top end of the piston rod 140 is symmetrically provided with a rack face 145 on the left and right sides, and the length direction of the rack face 145 is the up-down direction, the gear part 125 is engaged with the rack face 145, a first bearing is sleeved on the first cylindrical part 121, the first bearing is fixedly installed on the inner rear end of the second circular hole, a second bearing is sleeved on the fifth cylindrical part 127, the second bearing is fixedly installed on the inner front end of the second circular hole, the front side of the shell 110 is provided with an air inlet hole, the air inlet hole is in communication with the inside of the piston cylinder 141, the bottom end of the piston cylinder 141 is provided with a through hole corresponding to the air inlet hole; the top of the central body 100 is fixedly installed with a support sleeve 500 and a mounting seat 600, the bottom of the mounting seat 600 is provided with an avoiding groove avoiding the support sleeve 500, the top of the mounting seat 600 is fixedly installed with a driving motor 700, the top of the stirring shaft 300 is provided with a rectangular protrusion 302 integrally formed with the stirring shaft 300, the top of the stirring shaft 300 is fixedly installed with a coaxial locking nut 800, the bottom end of the support sleeve 500 is sleeved with a third bearing, the outer ring of the third bearing is fixedly installed on the inner top of the first circular hole, the inside of the support sleeve 500 is provided with a centripetal stop lever, one side of the locking nut 800 is provided with an upward and downward penetrating groove, the stop lever is located in the groove, the output shaft of the driving motor 700 is fixedly connected with the top end of the support sleeve 500 through the mounting seat 600, the driving motor 700 is used for driving the axial rotation of the support sleeve 500, the support sleeve 500, the locking nut 800 and the stirring shaft 300 are coaxially arranged;The stirring shaft 300 is sequentially provided with a rectangular protrusion 302, a first circular rod portion 303, a second circular rod portion 304, a third circular rod portion 305, a fourth circular rod portion 306, a fifth circular rod portion 307, a sixth circular rod portion 308 and a seventh circular rod portion 309 from top to bottom along the axial direction, the first circular rod portion 303, the third circular rod portion 305 and the sixth circular rod portion 308 have the same diameter, the second circular rod portion 304 and the fourth circular rod portion 306 have the same diameter, the diameter of the second circular rod portion 304 and the fourth circular rod portion 306 is smaller than that of the first circular rod portion 303, the diameter of the seventh circular rod portion 309 is smaller than that of the second circular rod portion 304, the diameter of the fifth circular rod portion 307 is larger than that of the first circular rod portion 303, the first circular rod portion 303 is provided with a threaded surface, the first circular rod portion 303 is sequentially screwed with a first nut and a second nut from top to bottom, the top end of the third circular rod portion 305 is sleeved with a compression ring, the bottom end of the third circular rod portion 305 is sleeved with a fifth bearing, a locking nut 800 is sleeved on the fifth bearing, and a positioning sleeve 301 is sleeved on the bottom end of the locking nut 800.

[0028] As shown in Figures 1-9 , the inner top of the mounting seat 600 is screwed with a limiting nut, the top of the compression spring is attached to the bottom of the limiting nut, and the height position of the limiting nut in the interior of the mounting seat 600 is adjusted, so that the compression spring is in different compression lengths, and the force of the compression spring applied to the reset of the stirring shaft 300 is adjusted.

[0029] As shown in Figures 1-6 , the locking nut 800 is sequentially provided with a first circular ring portion, a second circular ring portion, a third circular ring portion and a fourth circular ring portion from top to bottom along the axial direction, a groove is arranged on the side surface of the first circular ring portion, the groove penetrates the first circular ring portion from top to bottom, the diameter of the first circular ring portion is larger than that of the second circular ring portion, the diameter of the second circular ring portion is larger than that of the third circular ring portion, the diameter of the third circular ring portion is smaller than that of the fourth circular ring portion, and the diameter of the fourth circular ring portion is smaller than that of the second circular ring portion. The XY plane of the positioning sleeve 301 is in a rectangular cross section, and the left and right two side surfaces of the positioning sleeve 301 are both provided with arc surfaces, the top center position of the positioning sleeve 301 is provided with a mounting circular hole penetrating from top to bottom, and the top end of the first circular hole is provided with a shape conforming to the outer wall of the positioning sleeve 301.

[0030] As shown in Figures 1-6 , the top of the mixing cavity 200 is provided with a perforation for penetrating the bottom end of the stirring shaft 300, an oil seal is arranged in the perforation for sealing the gap between the stirring shaft 300 and the perforation, and the bottom of the mixing cavity 200 is provided with a discharge hole.

[0031] The feed valve of the feed module 400 of the present application is a commercially available feed valve.

[0032] The positioning blind hole, the piston rod 140, the piston cylinder 141, and the piston disc 142 are coaxially arranged. When air is sent to the inside of the piston cylinder 141 through the via hole and the air inlet hole, the piston rod 140 moves upward. The rack surface and the gear portion are engaged, so the gear portion rotates, thereby driving the cam portion to rotate. When the cam portion rotates to a certain position, it strikes upward against the protrusion at the bottom end of the positioning sleeve 301. Because the positioning sleeve 301 is fixedly connected with the stirring shaft 300, the stirring shaft 300 moves upward, thereby realizing the upward and downward movement of the stirring shaft 300.

[0033] As shown in Figure 10 As shown in Figure 10 The water pipe connector connecting block is first placed with an O-ring (8x1.5) in the groove, and then connected with the bulk mixing chamber through an M5X30 internal hexagonal screw. Then, an O-ring (25x2) is placed in the recess inside the mixing chamber, and vaseline is applied; then the skeleton oil seal sleeve is placed on the mixing chamber shaft seal sleeve, vaseline is applied, and the mixing chamber center hole is pressed in; then a 29x2 sealing ring and a 40x2 sealing ring are placed in the groove on the upper surface of the mixing chamber, a skeleton oil seal 8-18-6 is placed on the mixing chamber shaft seal sleeve, vaseline is applied, the mixing chamber shaft seal tool is pressed into the center groove of the bearing seat, the bearing seat bearing gasket is placed, the 6003 bearing is pressed, and then the stirring shaft sleeve is placed in the inner ring of the bearing, so a coaxial stirring rod needs to be fixedly installed at the bottom end of the stirring shaft. The stirring rod needs to pass through and enter the inside of the mixing chamber, so the precision needs to be very high. By fixing the stirring rod below the stirring shaft, the overall manufacturing difficulty of the stirring shaft in the device is reduced.

[0034] In embodiment 2, a mixing chamber is used to mix different components of materials. The mixing chamber is provided with a first feeding port and a second feeding port at the top end. The first feeding port and the second feeding port are symmetrically arranged on the left and right sides of the mixing chamber, and the first feeding port is located on the left side of the top end of the mixing chamber. A feed module is provided, which includes a first feed valve and a second feed valve. The first feed valve and the second feed valve are symmetrically arranged on the left and right sides of the stirring module. The first feed valve is provided with one material inlet and one material outlet. The structure of the second feed valve is consistent with that of the first feed valve. The material outlet of the first feed valve is connected with the first feeding port through a feeding pipe, and the material outlet of the second feed valve is connected with the second feeding port through a feeding pipe.

[0035] By adopting the technical scheme, the first feeding valve and the second feeding valve are essentially gear pumps, the material inlets of the first feeding valve and the second feeding valve are respectively connected to a storage bin through pipelines, different materials are stored in the storage bin, the first feeding valve and the second feeding valve extract liquid materials in the storage bin through the gear pumps and the pipelines, and then the materials are sent into the mixing cavity through the feeding pipes. In this process, because the first feeding valve and the second feeding valve are both driven by the power systems of the gear pumps thereof, there is a speed difference, which is an uncontrollable speed difference caused by materials, control accuracy and other factors. Therefore, the feeding amount of the first feeding valve and the second feeding valve is within a range. Assuming that the first feeding valve feeds at a feeding speed of 10 cubic centimeters per second and the second feeding valve feeds at a feeding speed of 1 cubic centimeter per second, the transportation error is plus or minus 3%, that is, the feeding speed range of the first feeding valve is 9.7 cubic centimeters to 10.3 cubic centimeters, and the feeding speed range of the second feeding valve is 0.97 to 1.03, so the pressure in the mixing cavity fluctuates within a range. The fluctuation is the reason why the glue coating accuracy is difficult to control. Through the setting of the stirring module for balancing the internal pressure of the mixing cavity, the internal pressure of the mixing cavity is constant and controllable, so that high-precision glue coating is realized.

[0036] In further embodiments, the mixing cavity is a rectangular block structure, a first circular hole is arranged at the middle position of the top of the mixing cavity, the bottom end of the first circular hole does not penetrate the mixing cavity, the first circular hole is sequentially provided with a first cylindrical surface and a second cylindrical surface from top to bottom along the axial direction, the diameter of the first cylindrical surface is greater than that of the second cylindrical surface, a first sleeve is fixedly installed at the inner top end of the first circular hole, the first sleeve is coaxial with the first cylindrical surface, the top end surface of the first sleeve is coplanar with the top end surface of the mixing cavity, a first oil seal is fixedly installed in the first sleeve, the first oil seal is coaxial with the first sleeve, the top end surface of the first oil seal is attached to the bottom end surface of the annular protrusion, the bottom end surface of the first oil seal is coplanar with the top end surface of the second cylindrical surface, the inner diameter of the first oil seal is smaller than the diameter of the second cylindrical surface, the first feeding inlet and the second feeding inlet are both in communication with the second cylindrical surface, and an eccentric injection hole is arranged at the bottom of the mixing cavity and in communication with the first circular hole.

[0037] By adopting the technical scheme, when the stirring shaft part of the stirring module penetrates the oil seal into the first circular hole from top to bottom, the first feeding valve and the second feeding valve start to feed into the first circular hole. Because the injection hole is eccentric with the first circular hole, the material is first extruded upward, and the structure design of the stirring shaft realizes pressure stabilization of the material in the first circular hole, thereby playing a pressure stabilizing role.

[0038] In further embodiments, the inner bottom of the spray hole is fixedly mounted with a sealing plate, the inner bottom end of the first spray hole is provided with a first return spring, the top of the first return spring is fixedly mounted with a first cylinder, the diameter of the first cylinder is transitionally matched with the diameter of the spray hole, and the inner bottom end of the spray hole is provided from top to bottom with a plurality of first ring grooves, each of which is provided with a first sealing ring, the bottom end of the mixing cavity is provided with a second circular hole transverse to the axis, the left end of the second circular hole is communicated with the bottom end of the spray hole, the right end of the second circular hole is provided with a plug column, the plug column is used to completely seal the right end of the second circular hole, the bottom center of the mixing cavity is provided with a feeding port, the top end of the feeding port is communicated with the second circular hole, and the bottom end of the feeding port is fixedly mounted with a nozzle.

[0039] By adopting the above technical scheme, the sealing plate and the first return spring actually constitute a pressure relief valve, when the pressure is less than the set value, the first cylinder completely blocks the communication between the second circular hole and the spray hole, when the pressure reaches the standard, the first return spring is depressed, the top end surface of the first cylinder moves downward, the second circular hole is communicated with the spray hole, the material enters the inside of the feeding port through the spray hole and the second circular hole, and is finally sprayed on the surface of the object by the nozzle, so it needs to be noted that the whole device can only work within the negative deviation, that is, assuming that the first feeding valve feeds at a feeding speed of 10 cubic centimeters per second, and the second feeding valve feeds at a feeding speed of 1 cubic centimeter per second, the error of their standard transportation can only be a negative error, for example, a negative percentage of three, that is, under this assumption, the feeding speed range of the first feeding valve is only 9.7 cubic centimeters-10 cubic centimeters, and the feeding speed range of the second feeding valve is only 0.97-1, so that the material is prevented from extruding the first return spring to cause the non-uniformly mixed material to flow out in the case of positive error.

[0040] In the embodiments disclosed in the present application, the terms "mount", "connect", "link", "fix" and the like should be understood in a broad sense, for example, "connect" can be fixed connection, detachable connection or integral connection; "connect" can be direct connection or indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the embodiments disclosed in the present application can be understood according to the specific circumstances.

[0041] The specific embodiments are only an explanation of the present application, and are not a limitation of the present application, those skilled in the art can make modifications to the embodiments without creative contribution according to the needs after reading the present application, but as long as the modifications are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A constant pressure valve mechanism for a multi-component adhesive spray nozzle, characterized in that: The utility model relates to a center body (100) is fixedly installed with mixing chamber (200) at the bottom end, is provided with stirring shaft (300) in the center position of center body (100), and center body (100) is used for driving stirring shaft (300) rotation and up and down pull; And feed module (400) is composed of multiple feed valves that are symmetrically distributed at the bottom end of center body (100), the valve body of feed valve is provided with inlet and outlet, and the outlet is communicated with the inside of mixing chamber (200) through pipeline. The center body (100) includes a shell (110), a first lever (120), a second lever (130), a piston rod (140), a limiting rod (150), a return spring (160), and a plug (170); 2. The constant pressure valve mechanism of a multi-component adhesive dispensing nozzle according to claim 1, wherein: The top of the shell (110) is provided with a first circular hole that penetrates from top to bottom, the top end of the stirring shaft (300) is inserted into the shaft hole, and the diameter of the top end of the stirring shaft (300) is larger than the diameter of the first circular hole; the front top of the shell (110) is provided with two second circular holes that penetrate from front to back, and the two second circular holes are symmetrically arranged about the axis of the stirring shaft (300); the rear ends of the two stirring shafts (300) are communicated with the first circular hole; the bottom of the shell (110) is provided with a positioning blind hole, and the axis of the positioning blind hole is parallel to the axis of the stirring shaft (300); the rear side of the positioning blind hole is not communicated with the front side of the first circular hole, and the top end of the positioning blind hole is communicated with the two second circular holes; The inside of the positioning blind hole is fixedly installed with a piston cylinder (141), the top and bottom ends of the piston cylinder (141) are completely open, the top end of the plug (170) is inserted into the inner bottom end of the piston cylinder (141), the bottom end of the plug (170) is detachably connected with the shell (110) through bolts, the bottom end of the piston rod (140) is located at the inner top end of the piston cylinder (141), and the bottom end of the piston rod (140) is coaxial with the top end of the piston cylinder (141); the bottom end of the piston rod (140) is provided with a piston disc (142), the piston disc (142) is slidingly installed at the inner top end of the piston cylinder (141), the top end of the limiting rod (150) is fixedly connected with the inner top of the positioning blind hole, and the limiting rod (150) is coaxial with the positioning blind hole; the top of the piston rod (140) is provided with a first shaft hole, and the bottom end of the first shaft hole does not penetrate the piston rod (140); the return spring (160) is coaxially arranged in the inside of the positioning blind hole, the top end of the return spring (160) abuts against the top of the positioning blind hole, the bottom of the return spring (160) abuts against the inner bottom of the first shaft hole of the piston rod (140), the outer diameter of the return spring (160) is clearance-fitted with the inner diameter of the first shaft hole, the inner diameter of the return spring (160) is clearance-fitted with the diameter of the limiting rod (150), and the limiting rod (150) is used for guiding the contraction direction of the top end of the return spring (160). ​ The structural size of the first and second beaters (120, 130) is consistent, the first and second beaters (120, 130) are arranged in the second circular holes on the left and right sides respectively, and the axes of the first and second beaters (120, 130) are parallel to the axes of the second circular holes; the first beater (120) is sequentially arranged from front to back along the axial direction as a first cylindrical part (121), a second cylindrical part (122), a cam part (123), a third cylindrical part (124), a gear part (125), a fourth cylindrical part (126), a fifth cylindrical part (127) and a rectangular part (128); a positioning sleeve (301) is slidably arranged on the inner top end of the first circular hole, the positioning sleeve (301) is sleeved on the top end of the stirring shaft (300), the top and bottom of the positioning sleeve (301) are completely open, the bottom end of the positioning sleeve (301) is symmetrically provided with a downward protrusion, the bottom end face of the protrusion is matched with the cam part (123), the top end of the piston rod (140) is symmetrically provided with a rack face (145) on the left and right sides, and the length direction of the rack face (145) is the up-down direction, the gear part (125) is engaged with the rack face (145), a first bearing is sleeved on the first cylindrical part (121), the first bearing is fixedly installed at the inner rear end of the second circular hole, a second bearing is sleeved on the fifth cylindrical part (127), the second bearing is fixedly installed at the inner front end of the second circular hole, the front side of the shell (110) is provided with an air inlet hole, the air inlet hole is in communication with the inside of the piston cylinder (141), and the bottom end of the piston cylinder (141) is provided with a through hole corresponding to the air inlet hole.

3. The constant pressure valve mechanism of a multi-component adhesive dispensing nozzle according to claim 2, wherein: The top of the center body (100) is fixedly installed with a supporting sleeve (500) and a mounting seat (600), the bottom of the mounting seat (600) is provided with a avoiding groove avoiding the supporting sleeve (500), the top of the mounting seat (600) is fixedly installed with a driving motor (700), the top of the stirring shaft (300) is provided with a rectangular protrusion (302) integrally formed with the stirring shaft (300), the top of the stirring shaft (300) is fixedly installed with a coaxial locking nut (800), the bottom end of the supporting sleeve (500) is sleeved with a third bearing, the outer ring of the third bearing is fixedly installed at the inner top of the first circular hole, the inside of the supporting sleeve (500) is provided with a centripetal stop lever, one side of the locking nut (800) is provided with a recess penetrating up and down, the stop lever is located in the recess, the output shaft of the driving motor (700) is fixedly connected with the top end of the supporting sleeve (500) through the mounting seat (600), the driving motor (700) is used for driving the supporting sleeve (500) to rotate axially, and the supporting sleeve (500), the locking nut (800) and the stirring shaft (300) are coaxially arranged.

4. The constant pressure valve mechanism of a multi-component adhesive dispensing nozzle according to claim 3, wherein: The stirring shaft (300) is sequentially provided with a rectangular protrusion (302), a first circular rod portion (303), a second circular rod portion (304), a third circular rod portion (305), a fourth circular rod portion (306), a fifth circular rod portion (307), a sixth circular rod portion (308) and a seventh circular rod portion (309) from top to bottom along the axial direction, the first circular rod portion (303), the third circular rod portion (305) and the sixth circular rod portion (308) have the same diameter, the second circular rod portion (304) and the fourth circular rod portion (306) have the same diameter, the diameter of the second circular rod portion (304) and the fourth circular rod portion (306) is smaller than that of the first circular rod portion (303), the diameter of the seventh circular rod portion (309) is smaller than that of the second circular rod portion (304), the diameter of the fifth circular rod portion (307) is larger than that of the first circular rod portion (303), the first circular rod portion (303) is provided with a threaded surface, the first circular rod portion (303) is sequentially screwed with a first nut and a second nut from top to bottom, the top end of the third circular rod portion (305) is provided with a compression ring, and the bottom end of the third circular rod portion (305) is provided with a fifth bearing, the locking nut (800) is sleeved on the fifth bearing, and the positioning sleeve (301) is sleeved on the bottom end of the locking nut (800).

5. The constant pressure valve mechanism of a multi-component adhesive dispensing nozzle according to claim 4, wherein: The top of the locking nut (800) is provided with a limiting ring, the fiber ring is coaxial with the locking nut (800), the bottom of the limiting ring is attached to the top of the locking nut (800), the top of the limiting ring is provided with a compression spring coaxial with the limiting ring, and the top end of the compression spring is abutted against the inner top of the mounting seat (600).

6. The constant pressure valve mechanism of a multi-component adhesive dispensing nozzle according to claim 5, wherein: The inner top of the mounting seat (600) is screwed with a limiting nut, the top of the compression spring is attached to the bottom of the limiting nut, the height position of the limiting nut in the interior of the mounting seat (600) is adjusted, so that the compression spring is in different compression lengths, and the force applied to the stirring shaft (300) by the compression spring for resetting is adjusted.

7. The constant pressure valve mechanism of a multi-component adhesive dispensing nozzle according to claim 4, wherein: The locking nut (800) is sequentially provided with a first circular ring portion, a second circular ring portion, a third circular ring portion and a fourth circular ring portion from top to bottom along the axial direction, the groove is arranged on the side surface of the first circular ring portion, the groove penetrates the first circular ring portion from top to bottom, the diameter of the first circular ring portion is larger than that of the second circular ring portion, the diameter of the second circular ring portion is larger than that of the third circular ring portion, the diameter of the third circular ring portion is smaller than that of the fourth circular ring portion, and the diameter of the fourth circular ring portion is smaller than that of the second circular ring portion. The XY plane of the positioning sleeve (301) is in a rectangular shape, both left and right side surfaces of the positioning sleeve (301) are provided with arc surfaces, the top center of the positioning sleeve (301) is provided with a mounting circular hole penetrating the positioning sleeve (301) from top to bottom, and the top end of the first circular hole is provided with a shape conforming to the outer wall of the positioning sleeve (301).

8. The constant pressure valve mechanism of a multi-component coating applicator nozzle according to claim 4, characterized in that: The top of the mixing cavity (200) is provided with a through hole for penetrating the bottom end of the stirring shaft (300), the through hole is provided with an oil seal for sealing the gap between the stirring shaft (300) and the through hole, and the bottom of the mixing cavity (200) is provided with a discharging hole.

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