Single-liquid screw valve

Abstract

The utility model discloses a single-liquid screw valve which comprises a single-liquid screw valve body, a U-shaped frame is installed at the bottom of the single-liquid screw valve body, a glue discharging mechanism which is used for discharging glue and can stretch out and draw back is installed on the U-shaped frame, and the U-shaped frame can plug a glue outlet when the glue discharging mechanism stops discharging the glue. Glue is sprayed on a plate needing to be pasted through the glue outlet mechanism, after a section of glue spraying distance is finished, the glue outlet mechanism can be rapidly and automatically shortened, the glue outlet enters the inner side of the U-shaped frame, blocking of the glue outlet by the U-shaped frame is achieved, and therefore the phenomenon that after a section of glue spraying distance is finished each time, the glue outlet is blocked by the U-shaped frame can be effectively avoided. When the equipment stops discharging glue, residual glue liquid can fall off from the glue outlet, so that the situation that the glue leaks out when being extruded due to too thick glue during pasting is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to single liquid screw valve technical field, concretely is a single liquid screw valve. BACKGROUND

[0002] Single liquid screw valve is a kind of point glue device for high-precision, quantitative delivery of multiple viscosity colloid, and single liquid screw valve is mainly composed of rotor and stator, rotor rotates in stator mold core, and the combination of the two forms a sealed space, motor drives rotor rotation, through the eccentric helical structure of rotor, continuously extrudes glue particles, to realize the continuous stable output of glue liquid, and its output is proportional to the rotational speed of screw, based on infinite piston principle, belongs to volumetric fluid delivery mode, determines the relationship between the rotational speed of pump, time and flow, constant material can be metered by time or pump rotational speed, glue amount is not influenced by air pressure, also not influenced by fluid viscosity change and liquid level change, and precise quantitative discharge can be realized.

[0003] At present, single liquid screw valve stops glue output when a section of glue route ends in use process, but part of redundant glue liquid at glue outlet nozzle will be accumulated by dropping down, to cause the situation that glue is too thick at glueing breakpoint and appears to seep when pasting.

[0004] Therefore, a single liquid screw valve is proposed to solve the above problems. UTILITY MODEL CONTENTS

[0005] 1. Technical problem to be solved by the utility model

[0006] In view of the defects in the prior art, the utility model aims at providing a single liquid screw valve, to solve the situation that glue is too thick at glueing breakpoint and appears to seep when pasting due to part of redundant glue liquid at glue outlet nozzle being accumulated by dropping down when a section of glue route ends in use process of single liquid screw valve in the prior art.

[0007] Technical scheme

[0008] To achieve the above object, the utility model provides the following technical scheme:

[0009] A single-liquid screw valve, comprising a single-liquid screw valve, characterized in that a U-shaped frame is arranged at the bottom of the single-liquid screw valve, a glue discharging mechanism capable of stretching and contracting is arranged on the U-shaped frame and used for discharging glue, a glue nozzle used for coating glue on a glue coating surface is arranged on the glue discharging mechanism, the bottom of the glue nozzle is in a conical shape, the size of the outer ring surface of the glue nozzle matches the size of the inner side surface of the through hole arranged at the bottom of the inner side of the U-shaped frame, a stretching and contracting cylinder is slidably arranged at the inner side of the glue nozzle, a sealing limiting ring is arranged at the bottom of the stretching and contracting cylinder, the top of the stretching and contracting cylinder protrudes from the top of the glue nozzle and is threadedly connected with the glue discharging port at the bottom of the single-liquid screw valve, a spring is arranged on the outer ring surface of the stretching and contracting cylinder in a sleeving mode, and the two ends of the spring are fixedly connected with the bottom of the single-liquid screw valve and the top of the glue nozzle respectively.

[0010] As a preferred scheme of the utility model, the top of the U-shaped frame is fixedly arranged at the two end edges of the bottom of the single-liquid screw valve, a speed sensor used for monitoring the moving speed of the single-liquid screw valve is arranged on the outer side of the U-shaped frame, the running speed of the motor on the single-liquid screw valve is proportional to the moving speed, and the motor stops running when the speed sensor detects that the speed is 0.

[0011] As a preferred scheme of the utility model, the bottom of the inner side of the U-shaped frame is provided with a circular through hole, a rubber pad is arranged at the inner side of the through hole, the rubber pad is divided into four parts, and the rubber pad is tightly attached together without external extrusion. Beneficial effects

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] The utility model discloses a glue discharging mechanism is used for coating glue on the board to be pasted, after a section of glue coating distance is finished, the glue discharging mechanism can be shortened automatically, the glue discharging port enters the inner side of the U-shaped frame, the U-shaped frame is blocked, so that the glue discharging port can effectively avoid the situation that the residual glue drops when the equipment stops discharging after a section of glue coating distance is finished, and the situation that the glue seeps out when the glue is too thick and extruded during pasting is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the whole structure schematic view of the utility model discloses a single-liquid screw valve;

[0015] Figure 2 It is the U-shaped frame amplification structure schematic view of the utility model discloses a single-liquid screw valve;

[0016] Figure 3The utility model discloses a single liquid screw valve's glue outlet mechanism expansion structure diagram.

[0017] In the drawing: 1, single liquid screw valve;2, U-shaped frame;21, speed sensor;22, rubber pad;3, glue outlet mechanism;31, glue nozzle;32, telescopic cylinder;33, spring. PREFERRED EMBODIMENT

[0018] The utility model discloses an embodiment of the utility model will be below, clear, complete, the technical scheme in the embodiment of the utility model in the embodiment of the utility model is described, obviously, the described embodiment only is a part of embodiment of the utility model, but not all the embodiment, based on the embodiment in the utility model, all other embodiments that the ordinary skill in the art obtains without making creative labor are within the scope of the utility model protection. EMBODIMENT

[0019] Please refer to Figures 1-3 , the embodiment provides a single liquid screw valve, including single liquid screw valve 1, the bottom of single liquid screw valve 1 is installed with U-shaped frame 2, U-shaped frame 2 is installed with the glue outlet mechanism 3 for glue and can be telescopic, U-shaped frame 2 can be blocked when glue outlet mechanism 3 stops glue outlet, the single liquid screw valve is when using, glue water is beaten on the slab that needs to be pasted through glue outlet mechanism 3, after a section of glue distance ends, glue outlet mechanism 3 can be shortened quickly automatically, make glue outlet enter to the inside of U-shaped frame 2, realize the blocking of glue outlet by U-shaped frame 2, thereby can effectively avoid the glue liquid that will have residual at glue outlet when equipment stops glue outlet after each section of glue distance ends and falls down, prevent the situation of exuding when glue water is too thick extrusion when pasting.

[0020] In the embodiment, as Figure 1 And Figure 2 Indicated, the top two ends of U-shaped frame 2 are fixedly installed at the bottom two end edges of single liquid screw valve 1, the outer side of U-shaped frame 2 is installed with speed sensor 21 for monitoring the moving speed of single liquid screw valve 1, the motor operating speed on single liquid screw valve 1 is directly proportional to the moving speed, when the speed sensor 21 detects the speed as 0, the motor stops running, therefore can control the speed of glue outlet according to the moving speed of single liquid screw valve 1, improves the uniformity of glue outlet.

[0021] In the embodiment, as Figure 2 Indicated, the inside bottom of U-shaped frame 2 starts to have a round through-hole, and the rubber pad 22 is installed on the inside of the through-hole, the rubber pad 22 is divided into four blocks, and the rubber pad 22 is tightly attached together when there is no external pressure, because the elastic recovery of rubber pad 22 is good, can quickly recover to the initial state when the external force disappears after extrusion.

[0022] In the embodiment, as shown in Figure 1 and Figure 3 The inner side of the glue nozzle 31 is slidingly installed with a telescopic cylinder 32, the bottom of the telescopic cylinder 32 is installed with a sealing limiting ring, the top of the telescopic cylinder 32 extends out of the top of the glue nozzle 31 and is threadedly connected with the bottom glue outlet of the single-fluid screw valve 1, a spring 33 is installed on the outer ring surface of the telescopic cylinder 32, and the two ends of the spring 33 are fixedly connected with the bottom of the single-fluid screw valve 1 and the top of the glue nozzle 31, respectively. After the single-fluid screw valve 1 extrudes glue into the inside of the glue nozzle 31, the glue seat 31 will slide downward and elongate on the telescopic cylinder 32 due to the pressure effect, and when the single-fluid screw valve 1 stops supplying glue, the glue nozzle 31 quickly returns and contracts on the telescopic cylinder 32 under the action of the spring 33.

[0023] In the embodiment, as shown in Figure 1 , Figure 2 and Figure 3 The glue nozzle 31 is contracted to the inside of the U-shaped frame 2 and abuts against the top of the rubber pad 22 in the initial state, and the glue nozzle 31 will squeeze apart the rubber pad 22 and pass through the inside of the through hole and extend out when the glue nozzle 31 is elongated to extrude glue. Therefore, when the glue is stopped, the glue nozzle 31 quickly contracts so that the bottom of the glue nozzle 31 abuts against the rubber pad 22, thereby effectively preventing the glue liquid remaining in the glue nozzle 31 from dropping.

[0024] Working principle: when the single-fluid screw valve is used, the single-fluid screw valve 1 extrudes glue into the inside of the glue nozzle 31, the glue seat 31 slides downward and elongates on the telescopic cylinder 32 due to the pressure effect, and the glue is applied according to the glue application route, and when the single-fluid screw valve 1 stops supplying glue, the glue nozzle 31 quickly returns and contracts on the telescopic cylinder 32 under the action of the spring 33, at this time, the bottom of the glue nozzle 31 abuts against the rubber pad 22, thereby effectively preventing the glue liquid remaining in the glue nozzle 31 from dropping, achieving the plugging of the glue outlet, and effectively avoiding the situation that the glue outlet will have residual glue liquid dropping when the equipment stops glue output after each glue application distance is completed, and preventing the situation of glue seepage when the glue is too thick during pasting.

[0025] All the technical features in the embodiment can be freely combined according to actual needs.

[0026] The above embodiment is a preferred implementation scheme of the utility model, and the utility model can also be implemented in other ways, and any obvious replacement without departing from the technical scheme concept is within the protection scope of the utility model.

Claims

1. A single-fluid screw valve comprising a single-fluid screw valve (1), characterized by: The bottom of the single-liquid screw valve (1) is provided with a U-shaped frame (2), the U-shaped frame (2) is provided with a glue discharging mechanism (3) for discharging glue and capable of stretching and contracting, the glue discharging mechanism (3) is provided with a glue nozzle (31) for coating glue on a glue coating surface, the bottom of the glue nozzle (31) is conical, the outer ring surface size of the glue nozzle (31) matches the inner side surface size of the through hole provided on the inner side bottom of the U-shaped frame (2), the inner side of the glue nozzle (31) is slidably provided with a telescopic cylinder (32), the bottom of the telescopic cylinder (32) is provided with a sealing limiting ring, the top of the telescopic cylinder (32) protrudes out of the top of the glue nozzle (31) and is threadedly connected with the bottom glue discharging port of the single-liquid screw valve (1), the telescopic cylinder (32) is provided on the outer ring surface with a spring (33) which is sleeved and mounted, the two ends of the spring (33) are fixedly connected with the bottom of the single-liquid screw valve (1) and the top of the glue nozzle (31) respectively, the U-shaped frame (2) can block the glue discharging port when the glue discharging mechanism (3) stops discharging glue, the glue nozzle (31) is retracted to the inner side of the U-shaped frame (2) and tightly abuts against the top of the rubber pad (22) in the initial state, and the glue nozzle (31) is stretched out of the glue and pushes away the rubber pad (22) to pass through the inner side of the through hole and protrude out.

2. A single fluid screw valve according to claim 1, wherein: The top of the U-shaped frame (2) is fixedly installed at the two end edges of the bottom of the single-liquid screw valve (1), one outer side surface of the U-shaped frame (2) is provided with a speed sensor (21) for monitoring the moving speed of the single-liquid screw valve (1), the running speed of the motor on the single-liquid screw valve (1) is proportional to the moving speed, and the motor stops running when the speed sensor (21) detects that the speed is 0.

3. A single fluid screw valve according to claim 1, wherein: The inner side bottom of the U-shaped frame (2) is provided with a circular through hole, the rubber pad (22) is installed on the inner side of the through hole, the rubber pad (22) is equally divided into four parts, and the rubber pad (22) is tightly abutted together without external pressure.

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