Polyurethane tire raw material premixing device

Abstract

The utility model discloses a polyurethane tire raw material premixing device, which relates to the polyurethane tire processing field, and comprises a tank body, a stirring shaft, a motor, a tank cover and a feed pipe, the top of the tank body is provided with the tank cover, the top of the tank cover is fixedly provided with the motor, the bottom of the tank cover is rotatably connected with the stirring shaft, and the output end of the motor is fixedly connected with the corresponding end of the stirring shaft. Feeding pipes are arranged on the two sides of the tank body, movable plugs are connected to the interiors of the feeding pipes in a sliding mode, L-shaped channels are formed in the movable plugs, and one ends of the L-shaped channels directly face the interior of the tank body. Materials can be accurately injected into the tank body through a conveying pipeline through the L-shaped channels formed in the movable plugs, and splashing or leakage in the feeding process is avoided; after the movable plug slides to a preset position, the clamping rod is automatically clamped into the clamping groove under the action of gravity, temporary locking of the feeding port is achieved, and the stability of the feeding pipe in the operation process is ensured.

Description

Technical Field

[0001] This utility model relates to the field of polyurethane tire processing, and in particular to a polyurethane tire raw material premixing device. Background Technology

[0002] Polyurethane tires are widely used in the manufacturing of high-performance tires due to their excellent wear resistance, tear resistance, and elasticity. The premixing quality of polyurethane tire raw materials directly affects the physical properties and service life of the finished tire. Therefore, efficient and precise premixing devices are needed to achieve uniform mixing of multi-component raw materials. Existing premixing devices often use open or single-layer sealed inlets. During high-pressure conveying or injection of high-viscosity raw materials (such as isocyanates and polyols), the raw materials are prone to leakage from the gap between the inlet and the pipeline, causing environmental pollution or material waste.

[0003] Secondly, after long-term use, the seals are prone to failure due to raw material corrosion or mechanical wear, which further aggravates the leakage problem. Moreover, they are difficult to repair online and require shutdown for replacement, affecting the continuity of production. Utility Model Content

[0004] The purpose of this invention is to provide a polyurethane tire raw material premixing device that solves the problems of poor feeding sealing and inconvenient maintenance and cleaning in the existing premixing process.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows: A premixing device for polyurethane tire raw materials includes a tank, a stirring shaft, a motor, a tank cover, and a feed pipe. The tank cover is provided on the top of the tank, and a motor is fixedly installed on the top of the tank cover. The stirring shaft is rotatably connected to the bottom of the tank cover. The output end of the motor is fixedly connected to one end of the stirring shaft. Feed pipes are provided on both sides of the tank. A movable plug is slidably connected inside the feed pipe. An L-shaped channel is opened inside the movable plug. One end of the L-shaped channel faces the inside of the tank, and the other end of the L-shaped channel faces upward.

[0006] Preferably, the inner wall of the feed tube is symmetrically provided with axially extending slides, the extension direction of the slides is consistent with the sliding direction of the movable plug, and the outer wall of the movable plug is symmetrically fixedly connected with sliders, the number of sliders corresponding to the number of slides, and the sliders are slidably connected inside the corresponding slides. The slides and sliders cooperate to form a sliding limiting structure to limit the radial displacement of the movable plug in the feed tube and guide it to slide axially, while preventing the movable plug from rotating circumferentially during the sliding process.

[0007] Preferably, the end of the slide near the inside of the tank is bent, and the bend is of degree, forming a bent section. When the movable plug slides to the slider reaching the bent section of the slide, the movable plug is completely submerged in the feed pipe and blocks the L-shaped channel. At this time, by rotating the movable plug, the slider can be moved into the locking position of the bent section, thereby locking the movable plug in a closed state and preventing the movable plug from being accidentally pulled out.

[0008] Preferably, the end of the slide away from the inside of the tank is open. When the movable plug slides to the open end of the slide, the axial displacement of the movable plug is not restricted by the end of the slide and can be pulled out of the feed pipe as a whole.

[0009] Preferably, the outer side of the end of the feed pipe away from the tank is provided with an annular groove, and an elliptical ring is slidably connected to the outer side of the annular groove. A locking rod is fixedly connected to one side of the elliptical ring. The bottom end of the locking rod is spherical and initially vertical. A locking groove is opened on the top of the movable plug, and the position of the locking groove corresponds to the vertical position of the locking rod. When the movable plug is pulled outward along the feed pipe to a preset distance, the end of the L-shaped channel used to connect to the conveying pipe is exposed, and the locking rod is facing the locking groove. At this time, under the action of the elliptical ring's own gravity, the elliptical ring slides down along the annular groove, driving the locking rod to engage in the locking groove, thereby positioning the movable plug in the preset position and preventing the movable plug from continuing to slide outward.

[0010] Preferably, the side of the slot away from the tank body is provided with an inclined surface. When the movable plug is pushed back into the feed pipe, the spherical bottom end of the clamping rod contacts the inclined surface. As the movable plug is pushed forward, the inclined surface guides the clamping rod to rise naturally along the inclined direction of the inclined surface, thereby causing the clamping rod to disengage from the slot and slide upward, thus preventing the clamping rod from obstructing the push of the movable plug.

[0011] Preferably, a pull ring is fixedly connected to the end of the movable plug away from the tank body. The pull ring is used to provide an application point for the operator to grip and pull or push the movable plug. A sealing ring is sleeved on the outer side of the end of the movable plug away from the tank body. When the movable plug is inserted into the feed pipe, the sealing ring fits tightly with the feed pipe to enhance the sealing between the movable plug and the feed pipe.

[0012] Compared with the prior art, the advantages of this utility model are as follows:

[0013] 1. This utility model allows materials to be precisely injected into the tank through the conveying pipe via the L-shaped channel inside the movable plug, avoiding splashing or leakage during the feeding process. After the movable plug slides to the preset position, the locking rod automatically engages with the slot under the action of gravity, temporarily locking the feed port and ensuring the stability of the feed pipe during operation.

[0014] 2. When the movable plug of this utility model is completely submerged in the feed pipe, its outer wall is tightly fitted with the inner wall of the feed pipe, forming a first seal with the sealing ring to prevent material leakage from the tank. When the movable plug slides to the closed position, the L-shaped channel is completely blocked, forming a second sealing barrier with the elastic seal of the sealing ring, further reducing the risk of leakage. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the can lid structure of this utility model.

[0017] Figure 3 This is a schematic diagram of a partial structure of the tank body of this utility model.

[0018] Figure 4 This is a schematic diagram of the feed pipe structure of this utility model.

[0019] Figure 5 This is a schematic diagram of the movable plug structure of this utility model.

[0020] Attached reference numerals: 1. Tank body; 2. Stirring shaft; 3. Motor; 4. Tank lid; 5. Feed pipe; 6. Movable plug; 7. L-shaped channel; 8. Slide rail; 81. Bend section; 9. Sliding block; 10. Annular groove; 11. Elliptical ring; 12. Locking rod; 13. Locking groove; 14. Inclined surface; 15. Pull ring; 16. Sealing ring. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Please see Figures 1 to 5 This embodiment provides a polyurethane tire raw material premixing device, including a tank body 1, a stirring shaft 2, a motor 3, a tank cover 4, and a feed pipe 5. The tank body 1 is provided with a tank cover 4, and a motor 3 is fixedly installed on the top of the tank cover 4. The stirring shaft 2 is rotatably connected to the bottom of the tank cover 4. The output end of the motor 3 is fixedly connected to one end of the stirring shaft 2. Feed pipes 5 are provided on both sides of the tank body 1. A movable plug 6 is slidably connected inside the feed pipe 5. An L-shaped channel 7 is opened inside the movable plug 6. One end of the L-shaped channel 7 faces the inside of the tank body 1, and the other end of the L-shaped channel 7 faces upward.

[0023] This polyurethane tire raw material premixing device is used to precisely mix the multi-component raw materials in polyurethane tire production, including basic raw materials, polyether polyols such as polypropylene glycol, and isocyanates such as diphenylmethane diisocyanate. These two are the core monomers of polyurethane synthesis. Through premixing, polyurethane prepolymers are formed. It also includes additives, including chain extenders, catalysts, foam stabilizers and flame retardants.

[0024] Raw materials are injected into the tank 1 through two feed pipes 5 on both sides. For example, polyether polyol and chain extender are fed through one feed pipe 5, and isocyanate and catalyst are fed through the other feed pipe 5 to prevent premature reaction of the raw materials. The movable plug 6 is pulled to the feeding position so that the open end of the L-shaped channel 7 faces upward and connects to the external conveying pipeline. Under pressure, the raw materials enter the tank 1 vertically along the L-shaped channel 7 to avoid splashing or leakage caused by direct pouring. The motor 3 drives the stirring shaft 2 to rotate at high speed. The stirring blades on the stirring shaft 2 fully mix the raw materials in the tank. The polyether polyol and isocyanate undergo a polymerization reaction under the action of the catalyst to form a polyurethane prepolymer. The chain extender reacts further with the prepolymer to adjust the molecular chain length and finally form a uniform polyurethane mixture. During the mixing process, the movable plug 6 slides to the closed position, the L-shaped channel 7 is blocked, the feeding path is cut off, and the raw materials are prevented from leaking or external impurities from entering the tank 1. After mixing, the polyurethane liquid is discharged through the outlet of the tank 1 for subsequent tire molding process.

[0025] The inner wall of the feed pipe 5 is symmetrically provided with axially extending slides 8. The extension direction of the slides 8 is consistent with the sliding direction of the movable plug 6. The outer wall of the movable plug 6 is symmetrically fixedly connected with sliders 9. The number of sliders 9 corresponds to the number of slides 8, and the sliders 9 are slidably connected inside the corresponding slides 8. The slides 8 and sliders 9 cooperate to form a sliding limiting structure to limit the radial displacement of the movable plug 6 in the feed pipe 5 and guide it to slide axially, while preventing the movable plug 6 from rotating circumferentially during the sliding process.

[0026] The end of the slide 8 near the inside of the tank 1 is bent at a 90-degree angle, forming a bent section 81. When the movable plug 6 slides to the slider 9 and reaches the bent section 81 of the slide 8, the movable plug 6 is submerged in the feed pipe 5 and blocks the L-shaped channel 7. At this time, by rotating the movable plug 6, the slider 9 can be moved into the locking position of the bent section 81, thereby locking the movable plug 6 in a closed state and preventing the movable plug 6 from being accidentally pulled out.

[0027] The end of the slide 8 away from the inside of the tank 1 is open. When the movable plug 6 slides to the slider 9 and reaches the open end of the slide 8, the axial displacement of the movable plug 6 is not restricted by the end of the slide 8 and can be pulled out from the feed pipe 5 as a whole. The open end is used to provide a disassembly channel for the movable plug 6 so as to clean, maintain or replace the movable plug 6.

[0028] An annular groove 10 is provided on the outer side of the end of the feed pipe 5 away from the tank body 1. An elliptical ring 11 is slidably connected to the outer side of the annular groove 10. A locking rod 12 is fixedly connected to one side of the elliptical ring 11. The bottom end of the locking rod 12 is spherical and the locking rod 12 is vertical in the initial state. A slot 13 is provided on the top of the movable plug 6. The position of the slot 13 corresponds to the vertical position of the locking rod 12.

[0029] When the movable plug 6 is pulled outward along the feed pipe 5 to a preset distance, the end of the L-shaped channel 7 used to connect to the conveying pipe is exposed, and the locking rod 12 is directly opposite the locking groove 13. At this time, under the action of its own gravity, the elliptical ring 11 slides downward along the annular groove 10, driving the locking rod 12 to lock into the locking groove 13, thereby positioning the movable plug 6 in the preset position and preventing the movable plug 6 from continuing to slide outward. Only when the elliptical ring 11 is manually slid upward and pulled to separate the locking rod 12 from the locking groove 13 can the movable plug 6 continue to be pulled outward.

[0030] The slot 13 has an inclined surface 14 on the side away from the tank 1. When the movable plug 6 pushes back into the feed pipe 5, the spherical bottom end of the clamping rod 12 contacts the inclined surface 14. As the movable plug 6 is pushed forward, the inclined surface 14 guides the clamping rod 12 to rise naturally along the inclined direction of the inclined surface 14, so that the clamping rod 12 disengages from the slot 13 and slides upward, thus preventing the clamping rod 12 from obstructing the push of the movable plug 6.

[0031] A pull ring 15 is fixedly connected to the end of the movable plug 6 away from the tank body 1. The pull ring 15 is used to provide an operating point for the operator to grip and apply force so as to pull or push the movable plug 6. A sealing ring 16 is sleeved on the outer side of the end of the movable plug 6 away from the tank body 1. When the movable plug 6 is inserted into the feed pipe 5, the sealing ring 16 fits tightly with the feed pipe 5 to enhance the sealing between the movable plug 6 and the feed pipe 5 and prevent material leakage or the entry of external impurities.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A premixing device for polyurethane tire raw materials, comprising a tank (1), a stirring shaft (2), a motor (3), a tank cover (4), and a feed pipe (5), wherein the tank (1) is provided with a tank cover (4) at the top, a motor (3) is fixedly installed on the top of the tank cover (4), and a stirring shaft (2) is rotatably connected to the bottom of the tank cover (4), and the output end of the motor (3) is fixedly connected to one end of the stirring shaft (2), characterized in that, The tank (1) is provided with feed pipes (5) on both sides. A movable plug (6) is slidably connected inside the feed pipe (5). An L-shaped channel (7) is opened inside the movable plug (6). One end of the L-shaped channel (7) faces the inside of the tank (1), and the other end of the L-shaped channel (7) faces upward.

2. The polyurethane tire raw material premixing device according to claim 1, characterized in that, The inner wall of the feed pipe (5) is symmetrically provided with axially extending slides (8). The extension direction of the slides (8) is consistent with the sliding direction of the movable plug (6). The outer wall of the movable plug (6) is symmetrically fixedly connected with sliders (9). The number of sliders (9) corresponds to the number of slides (8), and the sliders (9) are slidably connected inside the corresponding slides (8).

3. The polyurethane tire raw material premixing device according to claim 2, characterized in that, The slide (8) is bent at one end near the inside of the tank (1) with a bending angle of 90 degrees, forming a bent section (81).

4. The polyurethane tire raw material premixing device according to claim 3, characterized in that, The end of the slide (8) away from the interior of the tank (1) is open.

5. The polyurethane tire raw material premixing device according to claim 4, characterized in that, The feed pipe (5) has an annular groove (10) on the outer side of the end away from the tank (1). An elliptical ring (11) is slidably connected to the outer side of the annular groove (10). A locking rod (12) is fixedly connected to one side of the elliptical ring (11). The bottom end of the locking rod (12) is spherical and the locking rod (12) is vertical in the initial state. The top of the movable plug (6) has a locking groove (13). The position of the locking groove (13) corresponds to the vertical position of the locking rod (12).

6. The polyurethane tire raw material premixing device according to claim 5, characterized in that, The slot (13) has an inclined surface (14) on the side away from the tank (1).

7. The polyurethane tire raw material premixing device according to claim 1, characterized in that, The movable plug (6) is fixedly connected to a pull ring (15) at one end away from the tank body (1), and a sealing ring (16) is fitted on the outer side of the movable plug (6) away from the tank body (1).

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