Shaft-seal-free single-liquid screw valve

Abstract

The utility model belongs to the technical field of glue dispensing, and particularly relates to a shaft-seal-free single-liquid screw valve which comprises a glue barrel, a stator seat arranged at the bottom of the glue barrel and a stator arranged in the stator seat, a glue storage cavity used for storing glue is formed in an inner cavity of the glue barrel, and a screw is rotationally arranged in the stator. The inner peripheral wall of the stator and the outer peripheral wall of the screw rod form a spiral channel for glue to pass through; a motor is arranged at the top of the rubber sleeve, a connecting rod is arranged between the output end of the motor and the screw rod, a through hole for the connecting rod to penetrate through is formed in the rubber sleeve, and a gap is reserved between the inner circumferential wall of the through hole and the outer circumferential wall of the connecting rod; the large-capacity glue barrel is adopted, glue entering the glue barrel from the feeding barrel flows downwards under the action of gravity and the screw, the two liquid level sensors are used for monitoring the liquid level, the possibility of leakage does not exist, and therefore a shaft seal does not need to be used, the whole structure is compact, the size is small, installation and use are convenient, and the cost is low. And the maintenance and replacement frequency is reduced, and the maintenance cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of glue dispensing, and in particular relates to a shaft-seal-free single-liquid screw valve. Background Art

[0002] With the rapid development of the new energy vehicle industry, the requirements for automotive motor cores are becoming more and more stringent. As one of the main ways to improve the performance of motor cores, the gluing process of motor cores has put forward higher requirements on the appropriate amount, uniformity and stability of glue supply.

[0003] As a dispensing valve, the screw valve includes a motor, a screw, a connecting rod connecting the motor output shaft and the screw, and a stator cooperating with the screw. The motor drives the screw to rotate, and the screw and the stator engage with each other. The glue in the rubber barrel enters the glue outlet joint through the stator to complete the glue discharge.

[0004] A Chinese patent with application number CN202221830824.8 discloses an integrated vacuum glue filling screw leak-stop valve. The rotor rotates to drive the glue in the glue rear end flow channel to move toward the stator. The rotor and the stator cooperate to stably drive the glue into the glue front end flow channel. The glue rear end flow channel is located in a limit fixing seat, and the limit fixing seat is small in size. The glue rear end flow channel formed by the inner wall of the limit fixing seat and the outer wall of the rotor is also narrow, so the amount of glue that can be accommodated is small. The glue entering the glue inlet flow channel often has the possibility of leakage. Therefore, a shaft seal is required to seal the limit fixing seat, resulting in a complex structure, cumbersome installation and high maintenance cost. Utility Model Content

[0005] The technical problem to be solved by the utility model is: in order to solve the problem that the limit fixing seat in the screw valve in the prior art is small in volume, the glue rear end flow channel formed by the inner wall of the limit fixing seat and the outer wall of the rotor is also narrow, so the amount of glue that can be accommodated is small, and the glue entering from the glue inlet flow channel is often likely to leak, and a shaft seal is required to seal the limit fixing seat, resulting in a complex structure, cumbersome installation and high maintenance cost. A shaft seal-free single-liquid screw valve is now provided.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions: a shaft seal-free single-liquid screw valve, comprising a rubber cylinder, a stator seat arranged at the bottom of the rubber cylinder and a stator arranged inside the stator seat, the inner cavity of the rubber cylinder forms a glue storage cavity for storing glue, the volume of the rubber cylinder is large, so the glue storage cavity has a large capacity, a screw is rotatably arranged inside the stator, and the inner peripheral wall of the stator and the outer peripheral wall of the screw form a spiral channel for glue to pass through;

[0007] A motor is arranged on the top of the rubber cylinder, a connecting rod is arranged between the output end of the motor and the screw, a through hole is opened on the rubber cylinder for the connecting rod to pass through, and a gap is left between the inner peripheral wall of the through hole and the outer peripheral wall of the connecting rod, so that the connecting rod can rotate freely, and no shaft seal is required between the two.

[0008] During the working process, first open the glue supply pressure of the feed barrel to allow the glue in the feed barrel to enter the glue storage cavity of the glue barrel. The glue flows downward by its own weight. Then the motor inputs power to drive the screw to rotate. The screw rotates and meshes with the stator installed in the stator seat. The amount of glue flowing out for each rotation of the screw is fixed, thereby driving the glue in the glue barrel to enter the glue outlet joint for glue discharge in a quantitative manner.

[0009] The above technical solution adopts a large-capacity rubber cartridge, so that the glue entering the rubber cartridge from the feed barrel flows downward under the action of gravity and the screw, and there is no possibility of leakage, so there is no need to use a shaft seal, making the overall structure compact and small in size, easy to install and use, and reducing the frequency of maintenance and replacement, thereby reducing maintenance costs.

[0010] Furthermore, a coupling is provided between the output end of the motor and the connecting rod, a connecting sleeve is provided outside the coupling, one end of the connecting sleeve is fixed to a bracket for installing the motor, and the other end is fixed to an upper cover of the rubber cylinder, and the rubber cylinder can be fixed by the connecting sleeve.

[0011] Furthermore, a rotating shaft is provided between the screw and the connecting rod. The rotating shaft is a rigid shaft, but has flexibility and deflection. Compared with a conventional spring soft shaft, it has a faster response, more sensitive glue discharge, and higher precision.

[0012] Furthermore, liquid level sensors are installed on both sides of the rubber cylinder and the positions of the liquid level sensors are adjustable. The two liquid level sensors are distributed up and down to monitor the liquid level of the glue in the rubber cylinder to prevent glue leakage.

[0013] Furthermore, the bracket is provided with a mounting plate for installing the liquid level sensor, and the mounting plate is provided with a longitudinal waist-shaped groove for longitudinally adjusting the liquid level sensor and a transverse waist-shaped groove for transversely adjusting the liquid level sensor. The longitudinal adjustment and transverse adjustment of the liquid level sensor can be achieved through the cooperation of screws with the longitudinal waist-shaped groove and the transverse waist-shaped groove.

[0014] Furthermore, the top of the connecting sleeve is protruded to form a protruding portion for embedding into the annular groove at the bottom of the bracket, the protruding portion is embedded in the annular groove to position the connecting sleeve and the bracket and then the two are threadedly connected, and the bottom of the connecting sleeve is protruded to form an embedding portion for embedding into the top groove of the upper cover, the embedding portion is embedded in the groove to position the connecting sleeve and the upper cover and then the two are threadedly connected.

[0015] The beneficial effects of the utility model are as follows: the utility model adopts a large-capacity rubber barrel, so that the glue entering the rubber barrel from the feed barrel flows downward under the action of gravity and the screw, and two liquid level sensors are used to monitor the liquid level, so there is no possibility of leakage, so there is no need to use a shaft seal, making the overall structure compact, small in size, easy to install and use, and reducing the frequency of maintenance and replacement, thereby reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 It is a cross-sectional view of the utility model;

[0019] Figure 3 It is an exploded view of the utility model;

[0020] In the figure:

[0021] 1. Rubber cylinder; 101. Upper cover; 102. Perforation; 2. Stator seat; 3. Stator; 4. Screw; 5. Motor; 6. Connecting rod; 7. Coupling; 8. Connecting sleeve; 801. Protruding portion; 802. Embedded portion; 9. Bracket; 10. Rotating shaft; 11. Liquid level sensor; 12. Mounting plate; 1201. Longitudinal waist-shaped groove; 1202. Transverse waist-shaped groove; 13. Feeding barrel. DETAILED DESCRIPTION

[0022] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0023] like Figure 1-Figure 3 As shown, the utility model is a non-shaft seal type single-liquid screw valve, comprising a rubber cylinder 1, a stator seat 2 arranged at the bottom of the rubber cylinder 1, and a stator 3 arranged inside the stator seat 2. The rubber cylinder 1 is a cylindrical structure, and its inner cavity forms a rubber storage cavity for storing glue. The rubber cylinder 1 is large in volume, so the glue storage cavity has a large capacity. The glue storage cavity is connected with a feed cylinder 13, and its bottom is a conical structure. A connecting portion for embedding inside the stator seat 2 is protruded from the bottom of the rubber cylinder 1. The stator seat 2 and the stator 3 are connected by a key. A screw 4 is rotatably arranged inside the stator 3, and the inner peripheral wall of the stator 3 and the outer peripheral wall of the screw 4 form a spiral channel for glue to pass through;

[0024] The rubber cylinder 1 is provided with a motor 5 at the top, and a connecting rod 6 is provided between the output end of the motor 5 and the screw 4. The rubber cylinder 1 is provided with a through hole 102 for the connecting rod 6 to pass through, and a gap is left between the inner peripheral wall of the through hole 102 and the outer peripheral wall of the connecting rod 6, so that the connecting rod 6 can rotate freely without installing a shaft seal. A rotating shaft 10 is provided between the screw 4 and the connecting rod 6, and the rotating shaft 10 is a rigid shaft.

[0025] A coupling 7 is provided between the output end of the motor 5 and the connecting rod 6, and a connecting sleeve 8 is provided on the outside of the coupling 7. One end of the connecting sleeve 8 is fixed to the bracket 9 for installing the motor 5, and the other end is fixed to the upper cover 101 of the rubber cylinder 1. Therefore, the rubber cylinder 1 can be fixed by the connecting sleeve 8, and the feeding barrel 13 is fixed on the bracket 9. The top of the connecting sleeve 8 protrudes to form a protruding portion 801 for embedding into the annular groove at the bottom of the bracket 9. The protruding portion 801 embeds into the annular groove to position the connecting sleeve 8 and the bracket 9 and then the two are threadedly connected. The bottom of the connecting sleeve 8 protrudes to form an embedding portion 802 for embedding into the top groove of the upper cover 101. The embedding portion 802 embeds into the groove to position the connecting sleeve 8 and the upper cover 101 and then the two are threadedly connected.

[0026] Liquid level sensors 11 are installed on both sides of the rubber cylinder 1 and the position of the liquid level sensors 11 is adjustable. The two liquid level sensors are distributed up and down to monitor the liquid level of the glue in the rubber cylinder to prevent glue leakage. The bracket 9 is provided with a mounting plate 12 for mounting the liquid level sensor 11. The mounting plate 12 includes a longitudinal plate and a transverse plate. The longitudinal plate is provided with a longitudinal waist-shaped groove 1201 for longitudinally adjusting the liquid level sensor 11, and the transverse plate is provided with a transverse waist-shaped groove 1202 for transversely adjusting the liquid level sensor 11. The longitudinal and transverse adjustments of the liquid level sensor 11 can be achieved by the cooperation of screws with the longitudinal waist-shaped groove 1201 and the transverse waist-shaped groove 1202.

[0027] Working principle:

[0028] During the working process, first open the glue feeding air pressure of the feeding barrel 13 to allow the glue in the feeding barrel 13 to enter the glue storage cavity of the glue barrel 1, and the glue flows downward by its own weight. Then the motor 5 inputs power to drive the screw 4 to rotate. The screw 4 is rotationally engaged with the stator 3 installed in the stator seat 2, and the amount of glue flowing out of the screw 4 per rotation of one circle is fixed, thereby driving the glue in the glue barrel 1 to enter the glue outlet joint for glue discharge in a quantitative manner.

[0029] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A single-liquid screw valve without shaft seal, characterized in that: The invention comprises a rubber cartridge (1), a stator seat (2) arranged at the bottom of the rubber cartridge (1), and a stator (3) arranged inside the stator seat (2); the inner cavity of the rubber cartridge (1) forms a rubber storage cavity for storing glue; a screw (4) is rotatably arranged inside the stator (3); the inner peripheral wall of the stator (3) and the outer peripheral wall of the screw (4) form a spiral channel for the glue to pass through; A motor (5) is provided at the top of the rubber cylinder (1), a connecting rod (6) is provided between the output end of the motor (5) and the screw rod (4), the rubber cylinder (1) is provided with a through hole (102) for the connecting rod (6) to pass through, and a gap is left between the inner peripheral wall of the through hole (102) and the outer peripheral wall of the connecting rod (6).

2. The sealless single-liquid screw valve according to claim 1, characterized in that: A coupling (7) is provided between the output end of the motor (5) and the connecting rod (6), and a connecting sleeve (8) is provided outside the coupling (7). One end of the connecting sleeve (8) is fixed to a bracket (9) for mounting the motor (5), and the other end is fixed to an upper cover (101) of the rubber cylinder (1).

3. The sealless single-liquid screw valve according to claim 2, characterized in that: A rotating shaft (10) is provided between the screw rod (4) and the connecting rod (6), and the rotating shaft (10) is a rigid shaft.

4. The sealless single-liquid screw valve according to claim 2, characterized in that: Liquid level sensors (11) are installed on both sides of the rubber cylinder (1), and the positions of the liquid level sensors (11) are adjustable.

5. The sealless single-liquid screw valve according to claim 4, characterized in that: The bracket (9) is provided with a mounting plate (12) for mounting the liquid level sensor (11), and the mounting plate (12) is provided with a longitudinal waist-shaped groove (1201) for longitudinally adjusting the liquid level sensor (11) and a transverse waist-shaped groove (1202) for transversely adjusting the liquid level sensor (11).

6. The sealless single-liquid screw valve according to claim 2, characterized in that: The top of the connecting sleeve (8) is protruded to form a protruding portion (801) for embedding into the annular groove at the bottom of the bracket (9), and the bottom of the connecting sleeve (8) is protruded to form an embedding portion (802) for embedding into the groove at the top of the upper cover (101).

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