A durable rubber roll

Abstract

The application relates to the technical field of rubber rollers, in particular to a durable rubber roller which comprises an inner roller body, the outer surface of the inner roller body is sleeved with an outer roller body, the outer surface of the outer roller body is sleeved with a rubber roller body, the inner roller body comprises a core roller and movable rollers, the movable rollers are two and symmetrically sleeved on the core roller, one baffle is fixed at each end of the inner cavity of the outer roller body, through holes are formed in the two baffles, two groups of assembling parts are arranged at the two ends of the core roller, the two assembling parts pass through the two through holes and reach outside the two baffles, first ring shoulders are arranged at the outer circumferential end parts of the two movable rollers, and second ring shoulders are arranged on the outer circumferences of the two movable rollers, aging-proof agents are evenly applied on the outer circumferences of the rubber roller body, the aging-proof agents are used to quickly maintain the surface of the rubber roller after use, and the service life is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rubber roller, in particular to a durable rubber roller. BACKGROUND

[0002] The conveying roller is mainly used for conveying, supporting or rolling various materials. In the printing, textile, metallurgy, papermaking and other industries, in order to prevent the material from appearing indentation and other defects when conveying the material, the outermost layer of the conveying roller is often sleeved with rubber (commonly known as rubber roller), and the outer rubber is in flexible contact with the conveyed material, which not only protects the material but also increases the friction.

[0003] The printing and dyeing process contains chemical raw materials, and the chemical raw materials have certain corrosive properties. Although the conveying roller made of natural rubber has low cost, but with the long-term effect of friction and conveying force, the surface of the conveying roller will be prematurely abraded and aged, which affects its service life. SUMMARY

[0004] In order to solve the above problems, the present application provides a durable rubber roller, which comprises an inner roller body, an outer roller body sleeved on the outer surface of the inner roller body, and a rubber roller body sleeved on the outer surface of the outer roller body. The inner roller body comprises a core roller and a movable roller. The movable roller is symmetrical and sleeved on the core roller. The inner cavity of the outer roller body is fixed with a baffle at each end. The baffle is provided with a through hole. The core roller is provided with two groups of assembly parts at both ends. The assembly parts pass through the through hole and reach the outside of the baffle. The outer circular surface of the movable roller is provided with a first ring shoulder at each end. A plurality of second ring shoulders are arranged on the outer circular surface of the movable roller. A first pressure cavity is formed between the movable roller and the outer roller body. A second pressure cavity is formed between the movable roller and the outer roller body. The outer circular surface of the first ring shoulder is in sliding contact with the cavity wall of the outer roller body. The outer circular surface of the second ring shoulder is spaced apart from the cavity wall of the outer roller body. The first pressure cavity and the second pressure cavity are filled with an anti-aging agent. The first pressure cavity and the outer roller body are provided with a treatment assembly. The second pressure cavity and the outer roller body are also provided with a treatment assembly. The treatment assembly comprises an immersion pipe connected to the outer roller body. One end of the immersion pipe penetrates the outer circular surface of the rubber roller body, and the other end enters the first pressure cavity or the second pressure cavity and is flattened in the gap between the second ring shoulder and the outer roller body in the radial direction of the pipe cavity. When the movable roller moves to the middle position of the core roller, the gap is away from the immersion pipe, and the immersion pipe changes from flattening to relaxation.

[0005] Further preferably, the processing assembly further comprises a supporting spring filled in the outer roller body, two ends of the supporting spring respectively extend to the two movable rollers and enter the first pressure cavity and the second pressure cavity of the movable rollers, and the first ring shoulder and the second ring shoulder are the elastic supporting points, the supporting spring is coiled in the first pressure cavity and the second pressure cavity, and the two movable rollers are elastically supported by the two parts of the supporting spring, so that the first ring shoulder is tightly close to the stop plate on the same side.

[0006] Further preferably, the two movable rollers are elastically supported by the supporting spring, so that the opposite ends of the two movable rollers form a movement space in the middle of the inner cavity of the outer roller body, and the processing assembly further comprises a corrugated cover arranged in the movement space, both ends of the corrugated cover are provided with tapered surfaces, the left tapered surface faces the left movable roller, and the right tapered surface faces the right movable roller.

[0007] Further preferably, the outer roller body and the annular array on the rubber roller body are collectively provided with a plurality of assembly holes distributed on the periphery of the first pressure cavity and the second pressure cavity, and each assembly hole is provided with a dip tube.

[0008] Further preferably, when the dip tube is flattened in the gap, one end of the dip tube entering the first pressure cavity and the second pressure cavity is bent towards the end side after entering the gap and is attached to the cavity wall of the first pressure cavity and the second pressure cavity; on the contrary, when the dip tube is released from the gap, the dip tube is away from the cavity wall of the first pressure cavity and the second pressure cavity by using the flexible feature, and is deflected downwards and is perpendicular in the radial direction, the dip tube is provided with a dip hole, and the dip hole is attached to the cavity wall of the first pressure cavity and the second pressure cavity when the dip tube is attached to the cavity wall of the first pressure cavity and the second pressure cavity; on the contrary, one end of the dip tube is deflected downwards, and the dip hole is perpendicular in the straight line direction.

[0009] Further preferably, a chamfer is formed on the edge of the second ring shoulder, and the inclined direction of the chamfer is towards the bending part of the dip tube.

[0010] Further preferably, an injection hole is formed from the outside of the stop plate to the inside, the inner end of the injection hole penetrates the first ring shoulder and communicates with the first pressure cavity, a metal pipe is arranged on the injection hole, the inner end of the metal pipe enters the first pressure cavity, the outer end of the metal pipe extends out of the stop plate and is provided with a threaded cap.

[0011] Further preferably, an auxiliary plate is connected in the dip pipe, the auxiliary plate is a circular rubber plate, the circular profile of the auxiliary plate is consistent with the shape of the lumen of the dip pipe, the auxiliary plate is close to the bending part of the dip pipe and is deflected in the dip pipe, the auxiliary plate is slightly deflected upward along the lumen of the dip pipe, an auxiliary hole is formed in the auxiliary plate, and when the dip pipe is flattened in the gap, the auxiliary plate continues to deflect upward and further closes the dip pipe.

[0012] The present application has the following advantages over the prior art:

[0013] 1. The movable roller in the rubber roller can move linearly, the movable roller is provided with a first pressure cavity and a second pressure cavity by a plurality of ring shoulders, and the first pressure cavity and the second pressure cavity are filled with anti-aging agents. When the device is running, the rubber roller rotates at high speed and conveys materials, the heat generated on the rubber roller body is transferred to the outer roller body, and then to the first pressure cavity and the second pressure cavity, so that the self-heating ensures the fluidity of the anti-aging agents in the first pressure cavity and the second pressure cavity.

[0014] 2. Metal pipes are arranged at the ends. After the device is stopped, the two metal pipes are pushed to drive the left and right movable rollers to move towards each other along the core roller, so that the pressure in the first pressure cavity and the second pressure cavity is formed, and the anti-aging agents in the first pressure cavity and the second pressure cavity are forced to enter the dip pipe and then flow to the rubber roller body. When the conveying device is started, the rubber roller rotates at low speed. According to the assembly and use principle of the conveying roller, at least two rubber rollers are pressed together when the rubber roller is used, the top surface of the material is conveyed by the upper rubber roller, and the bottom surface of the material is conveyed by the lower rubber roller, so that the material is not wrinkled during conveying. At this time, the upper and lower rubber rollers are running (without material conveying), so that the anti-aging agents are evenly applied to the outer circular surface of the rubber roller body. After the rubber roller is used, the anti-aging agents are used to quickly maintain the surface, thereby improving the service life. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 An external structure diagram of a durable rubber roller is provided for the embodiment of the present application.

[0016] Figure 2 An internal structure diagram of a durable rubber roller after being cut open is provided for the embodiment of the present application.

[0017] Figure 3 A three-dimensional structure diagram of a durable rubber roller after being cut open is provided for the embodiment of the present application.

[0018] Figure 4 A durable rubber roller is provided for the embodiment of the present application. Figure 3 An enlarged diagram of part A is provided.

[0019] Figure 5 A schematic view of the inner roller body after disassembly in a durable rubber roller according to an embodiment of the present application;

[0020] Figure 6 A distribution schematic view of only the outer roller body, rubber roller body and dip pipe in a durable rubber roller according to an embodiment of the present application;

[0021] Figure 7 A principle diagram of the durable rubber roller in actual application when conveying materials according to an embodiment of the present application.

[0022] In the figure: 1, inner roller body; 2, outer roller body; 3, rubber roller body; 4, core roller; 5, movable roller; 6, baffle; 7, through hole; 8, assembling part; 9, first ring shoulder; 10, second ring shoulder; 11, auxiliary plate; 12, first pressure cavity; 13, second pressure cavity; 14, gap; 15, dip pipe; 16, supporting spring; 17, movement space; 18, corrugated cover; 19, conical surface; 20, assembling hole; 21, chamfer; 22, injection hole; 23, metal pipe; 24, threaded cap; 25, auxiliary hole; 26, dip hole. DETAILED DESCRIPTION

[0023] The above and other embodiments and advantages of the present application are described in detail in conjunction with the accompanying drawings. It is obvious that the described embodiments are only some embodiments of the present application, but not all embodiments of the present application.

[0024] In an embodiment, as shown in Figures 1-7 :

[0025] The embodiment provides a durable rubber roller, which comprises an inner roller body 1, an outer roller body 2 sleeved on the outer surface of the inner roller body 1, and a rubber roller body 3 sleeved on the outer surface of the outer roller body 2, the inner roller body 1 comprises a core roller 4 and two movable rollers 5, the two movable rollers 5 are symmetrically sleeved on the core roller 4, one baffle 6 is fixed at each end of the inner cavity of the outer roller body 2, a through hole 7 is formed in the two baffles 6, two sets of assembling parts 8 are arranged at the two ends of the core roller 4, the two sets of assembling parts 8 pass through the two through holes 7 and reach outside the two baffles 6, a first ring shoulder 9 is arranged at the outer circumferential end of each of the two movable rollers 5, a plurality of second ring shoulders 10 are arranged on the outer circumferences of the two movable rollers 5, a first pressure cavity 12 is formed between the first ring shoulder 9 and the first second ring shoulder 10 and surrounds the movable roller 5 and the outer roller body 2, a second pressure cavity 13 is formed between the two second ring shoulders 10 and surrounds the movable roller 5 and the outer roller body 2, the outer circumference of the first ring shoulder 9 is in sliding contact with the cavity wall of the outer roller body 2, a gap 14 is left between the outer circumference of the second ring shoulder 10 and the cavity wall of the outer roller body 2, the first pressure cavity 12 and the second pressure cavity 13 are filled with an anti-aging agent, a processing assembly is arranged between the first pressure cavity 12 and the outer roller body 2, a processing assembly is also arranged between the second pressure cavity 13 and the outer roller body 2, the processing assembly comprises an immersion pipe 15 connected to the outer roller body 2, one end of the immersion pipe 15 penetrates the outer circumference of the rubber roller body 3, the other end of the immersion pipe 15 enters the first pressure cavity 12 or the second pressure cavity 13 and is flattened in the gap 14 between the second ring shoulder 10 and the outer roller body 2 in the radial direction of the pipe cavity and is closed, when the movable roller 5 moves to the middle position of the core roller 4, the gap 14 is away from the immersion pipe 15, and the immersion pipe 15 changes from being flattened to being relaxed.

[0026] The injection hole 22 is formed from the outer surface of the baffle 6 to the inner surface, the inner end of the injection hole 22 penetrates the first ring shoulder 9 and communicates with the first pressure cavity 12, a metal pipe 23 is installed on the injection hole 22, the inner end of the metal pipe 23 enters the first pressure cavity 12, the outer end of the metal pipe 23 extends to the outside of the baffle 6 and is installed with a threaded cap 24, opening the threaded cap 24 injects the anti-aging agent into the first pressure cavity 12 through the metal pipe 23, after filling the first pressure cavity 12, the anti-aging agent is injected into the second pressure cavity 13 through the gap 14, and finally the threaded cap 24 is reinstalled, so as to prevent the anti-aging agent from leaking outward through the metal pipe 23 when the rubber roller rotates. The rubber roller not only has a conveying function, but also has a storage function. When the rubber roller rotates at high speed and conveys the material, heat will be generated on the rubber roller body 3, the heat is transferred to the outer roller body 2, and then transferred to the first pressure cavity 12 and the second pressure cavity 13. The self-heating ensures the flowability of the anti-aging agent in the first pressure cavity 12 and the second pressure cavity 13. After the equipment stops, the left and right threaded caps 24 are pushed, the left and right metal pipes 23 are pushed by the left and right threaded caps 24, and the left and right movable rollers 5 are pushed by the left and right metal pipes 23 to move towards the core roller 4. The gap 14 is away from the dip tube 15, the dip tube 15 is changed from being flattened to being relaxed, the pressure is formed in the first pressure cavity 12 and the second pressure cavity 13, and the anti-aging agent in the first pressure cavity 12 and the second pressure cavity 13 is forced to enter the dip tube 15, and then flows to the rubber roller body 3 through the dip tube 15. Starting the conveying equipment to drive the rubber roller to rotate at low speed. According to the assembly and use principle of the conveying roller (as shown in Figure 7 When the rubber roller is used, at least two rubber rollers are pressed together (the outer circular surface of the rubber roller body 3), the material (which can be understood as paper or printing and dyeing material) passes between the two rubber roller bodies 3, the top surface of the material is conveyed by the upper rubber roller, and the bottom surface of the material is conveyed by the lower rubber roller, so as to ensure that the material will not wrinkle during conveying. At this time, the upper and lower rubber rollers are running empty (without conveying material), so that the anti-aging agent is evenly applied to the outer circular surface of the rubber roller body 3. The rubber roller body 3 is quickly maintained after use by using the anti-aging agent, which improves the service life.

[0027] As Figure 2 , Figure 3As shown, the processing assembly further comprises a supporting spring 16 filled in the outer roller body 2, two ends of the supporting spring 16 respectively extend to the two movable rollers 5 and enter the first pressure cavity 12 and the second pressure cavity 13 of the movable rollers 5, and take the first ring shoulder 9 and the second ring shoulder 10 as the elastic support points, coil in the first pressure cavity 12 and the second pressure cavity 13, and the two movable rollers 5 are elastically supported by the two parts of the supporting spring 16, so that the first ring shoulder 9 abuts against the same side baffle 6. When the two threaded caps 24 are pressed to cause the two movable rollers 5 to move towards each other, the supporting spring 16 is compressed and shortened and stores elastic force, and when the two threaded caps 24 are loosened, the left and right metal pipes 23 no longer push the two movable rollers 5, and the two movable rollers 5 no longer move towards each other, at this time the supporting spring 16 restores the length, and pushes the left and right movable rollers 5 to be opposite to each other by using the elastic force released to the first ring shoulder 9 and the second ring shoulder 10. With the movement of the first ring shoulder 9 and the second ring shoulder 10, the gap 14 is pressed on the dip tube 15 again to make the dip tube 15 flatten and close. When the rubber roller rotates, the anti-aging agent in the first pressure cavity 12 and the second pressure cavity 13 will not overflow. The arrangement of the first ring shoulder 9 and the second ring shoulder 10 not only makes the anti-aging agent exist in multiple chambers during maintenance, facilitates uniform discharge to the rubber roller body 3, but also enables the dip tube 15 to close quickly during normal conveying work, and the anti-aging agent will not easily overflow.

[0028] As shown in Figure 1 , Figure 4 and Figure 6 , the outer roller body 2 and the rubber roller body 3 are provided with a plurality of assembly holes 20 distributed on the periphery of the first pressure cavity 12 and the second pressure cavity 13, and each assembly hole 20 is provided with a dip tube 15. The first pressure cavity 12 is provided with a ring of dip tubes 15, and the second pressure cavity 13 is provided with a ring of dip tubes 15. When the above maintenance operation is performed, the efficiency of applying the anti-aging agent to the rubber roller body 3 through the dip tubes 15 is further improved.

[0029] As shown in Figure 2 , Figure 4As shown, when the dip tube 15 is pressed in the gap 14, the end of the dip tube 15 entering the first pressure chamber 12 and the second pressure chamber 13 enters the gap 14 and bends towards the end side direction and then adheres to the chamber wall of the first pressure chamber 12 and the second pressure chamber 13. Conversely, when the dip tube 15 is released from the gap 14 (when the second ring shoulder 10 is pushed inwards by the movable roller 5), the dip tube 15 bends away from the chamber wall of the first pressure chamber 12 and the second pressure chamber 13 by virtue of the flexible feature, and then deflects downwards and is perpendicular in the radial direction. The dip tube 15 is provided with a dip hole 26, and when the dip tube 15 adheres to the chamber wall of the first pressure chamber 12 and the second pressure chamber 13, the dip hole 26 also adheres to the chamber wall of the first pressure chamber 12 and the second pressure chamber 13. Conversely, when the end of the dip tube 15 located in the first pressure chamber 12 and the second pressure chamber 13 deflects downwards, the dip hole 26 is perpendicular to the straight line direction of the first pressure chamber 12 and the second pressure chamber 13. When the first ring shoulder 9 and the second ring shoulder 10 are pushed inwards by the movable roller 5, hydraulic pressure is formed in the first pressure chamber 12 and the second pressure chamber 13, and the anti-aging agent in the chamber is sent into the dip tube 15 through the dip hole 26 by virtue of the hydraulic pressure, and then sent to the outer circular surface of the rubber roller body 3 from the outer end of the dip tube 15, thereby completing the anti-aging work of the rubber roller body 3.

[0030] As shown in Figure 3 , Figure 4 , a chamfer 21 is provided on the edge of the second ring shoulder 10, and the inclined direction of the chamfer 21 is towards the bending part of the dip tube 15. When the second ring shoulder 10 is pushed inwards by the movable roller 5, the chamfer 21 is away from the dip tube 15, the gap 14 becomes larger and releases the dip tube 15, and the dip tube 15 restores to its original shape by virtue of its elasticity and makes the dip hole 26 perpendicular to the straight line direction of each pressure chamber. As the movable roller 5 is pushed inwards, the anti-aging agent is injected into the dip tube 15 from the pressure chamber, and at this time the dip tube 15 is open, the dip tube 15 discharges the anti-aging agent to the surface of the rubber roller body 3, and the maintenance work is started. Conversely, when the second ring shoulder 10 is pushed outwards by the movable roller 5, the chamfer 21 presses on the dip tube 15, and the dip tube 15 bends towards the chamber wall by virtue of the inclined directional principle, and the gap 14 gradually becomes smaller and the dip tube 15 is pressed in the gap 14. At this time, the dip tube 15 stops discharging the anti-aging agent to the surface of the rubber roller body 3, and the maintenance work is completed.

[0031] As shown in Figures 2-5As shown, the two movable rollers 5 are elastically supported by the supporting spring 16, so that their opposite ends form a movement space 17 in the middle of the inner cavity of the outer roller body 2. The processing assembly further comprises a bellows 18 arranged in the movement space 17. The bellows 18 is provided with a tapered surface 19 at each end. The tapered surface 19 at the left end faces the left movable roller 5, and the tapered surface 19 at the right end faces the right movable roller 5. The bellows 18 is used to fill the movement space 17, and the tapered surfaces 19 at the two ends are used to reduce the volume of the adjacent second pressure chamber 13. When the two movable rollers 5 move relative to each other and generate hydraulic pressure in the second pressure chamber 13 by means of the ring shoulder structure, the anti-aging agent in the second pressure chamber 13 can enter the dip tube 15 in a short time, and then be quickly applied to the surface of the rubber roller body 3 through the dip tube 15.

[0032] As shown in the drawings, Figure 4 The dip tube 15 is connected with an auxiliary plate 11. The auxiliary plate 11 is a circular rubber plate. The circular profile of the auxiliary plate 11 is consistent with the shape of the lumen of the dip tube 15. The auxiliary plate 11 is close to the curved portion of the dip tube 15 and is inclined in the dip tube 15. The auxiliary plate 11 is slightly deflected upward along the lumen of the dip tube 15. The auxiliary plate 11 is provided with an auxiliary hole 25. When the dip tube 15 is opened, the auxiliary plate 11 is deflected into the lumen, and the auxiliary hole 25 is communicated with the lumen of the dip tube 15. At this time, the dip tube 15 is opened, and the lumen is opened through the auxiliary hole 25. When the dip tube 15 is flattened in the gap 14, the auxiliary plate 11 continues to deflect upward and further closes the dip tube 15. At this time, the auxiliary hole 25 is also closed due to the flattening of the dip tube 15. The arrangement of the auxiliary plate 11 makes the controlled mode of the dip tube 15 more effective.

[0033] The above orientation reference does not represent the specific orientation of each component in the embodiment. The embodiment is only for the convenience of describing the scheme and is relatively described by referring to the orientation in the drawings. In essence, the specific orientation of each component is determined according to its actual installation and actual use as well as the orientation description habit of those skilled in the art. Therefore, it is stated herein.

[0034] The above specific embodiments further describe the inventive purpose, technical solutions, and beneficial effects of the present application. It should be understood that the above description is only a specific embodiment of the present application and does not limit the protection scope of the present application. It is particularly pointed out that any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A long wearing rubber roll characterized in that, The utility model provides a rubber roller body, which comprises an inner roller body (1), an outer roller body (2) sleeved on the outer surface of the inner roller body (1), and a rubber roller body (3) sleeved on the outer surface of the outer roller body (2), wherein the inner roller body (1) comprises a core roller (4) and two movable rollers (5) symmetrically sleeved on the core roller (4); two end plates (6) are fixed on the inner cavity of the outer roller body (2); through holes (7) are formed in the two end plates (6); two sets of assembly parts (8) are arranged at the two ends of the core roller (4) and extend out of the two end plates (6) through the two through holes (7); first ring shoulders (9) are arranged at the outer circumferential ends of the two movable rollers (5); a plurality of second ring shoulders (10) are arranged on the outer circumferences of the two movable rollers (5); a first pressure cavity (12) is formed between the first ring shoulder (9) and the second ring shoulder (10) and surrounds the movable roller (5) and the outer roller body (2); a second pressure cavity (13) is formed between the two second ring shoulders (10) and surrounds the movable roller (5) and the outer roller body (2); the outer circumferential surface of the first ring shoulder (9) is in sliding contact with the cavity wall of the outer roller body (2); a gap (14) is formed between the outer circumferential surface of the second ring shoulder (10) and the cavity wall of the outer roller body (2); the first pressure cavity (12) and the second pressure cavity (13) are filled with an anti-aging agent; a treatment assembly is arranged between the first pressure cavity (12) and the outer roller body (2) and between the second pressure cavity (13) and the outer roller body (2); the treatment assembly comprises an immersion pipe (15) connected to the outer roller body (2); one end of the immersion pipe (15) penetrates the outer circumferential surface of the rubber roller body (3); the other end of the immersion pipe (15) enters the first pressure cavity (12) or the second pressure cavity (13) and is flattened in the gap (14) between the second ring shoulder (10) and the outer roller body (2) in the radial direction of the pipe cavity; when the movable roller (5) moves to the middle position of the core roller (4), the gap (14) is away from the immersion pipe (15), and the immersion pipe (15) changes from flattening to relaxation.

2. A long wearing rubber roll as claimed in claim 1 wherein, The treatment assembly further comprises a supporting spring (16) filled in the outer roller body (2); the two ends of the supporting spring (16) extend to the two movable rollers (5) and enter the first pressure cavity (12) and the second pressure cavity (13) of the movable rollers (5); the supporting spring (16) is coiled in the first pressure cavity (12) and the second pressure cavity (13) with the first ring shoulder (9) and the second ring shoulder (10) as elastic support points; and the two movable rollers (5) are tightly abutted against the end plates (6) on the same side under the elastic support of the two parts of the supporting spring (16).

3. A long wearing rubber roll as set forth in claim 2 wherein, Two said movable rollers (5) are elastically supported by said supporting spring (16), so that their opposite ends form a movement space (17) in the middle of the inner cavity of said outer roller body (2), said processing assembly further comprises a corrugated cover (18) arranged in the movement space (17), both ends of said corrugated cover (18) are provided with tapered surfaces (19), the left said tapered surface (19) faces the left said movable roller (5), and the right said tapered surface (19) faces the right said movable roller (5).

4. A long wearing rubber roll as set forth in claim 3 wherein, The outer roller body (2) and the rubber roller body (3) are provided with a plurality of assembly holes (20) distributed on the periphery of the first pressure cavity (12) and the second pressure cavity (13), and each assembly hole (20) is provided with a dip tube (15).

5. A long wearing rubber roll as set forth in claim 4 wherein, When the dip tube (15) is flattened in the gap (14), one end of the dip tube (15) entering the gap (14) and bending towards the end side direction is fitted on the cavity wall of the first pressure cavity (12) and the second pressure cavity (13); on the contrary, when the dip tube (15) is released from the gap (14), the dip tube (15) is away from the cavity wall of the first pressure cavity (12) and the second pressure cavity (13) by using the flexible feature, and is deflected downwards and perpendicular to the radial direction, the dip tube (15) is provided with a dip hole (26), when the dip tube (15) is fitted on the cavity wall of the first pressure cavity (12) and the second pressure cavity (13), the dip hole (26) is also fitted on the cavity wall of the first pressure cavity (12) and the second pressure cavity (13); on the contrary, one end of the dip tube (15) located in the first pressure cavity (12) and the second pressure cavity (13) is deflected downwards, and the dip hole (26) is perpendicular to the straight line direction.

6. A long wearing rubber roll as set forth in claim 5 wherein, The edge of the second ring shoulder (10) is provided with a chamfer (21), and the inclined direction of the chamfer (21) is towards the bending part of the dip tube (15).

7. A long wearing rubber roll as defined in claim 6 wherein, An injection hole (22) is formed from the outside to the inside of the baffle (6), the inner end of the injection hole (22) penetrates the first ring shoulder (9) and communicates with the first pressure cavity (12), a metal pipe (23) is installed on the injection hole (22), the inner end of the metal pipe (23) enters the first pressure cavity (12), and the outer end of the metal pipe (23) extends out of the baffle (6) and is provided with a threaded cap (24).

8. A long wearing rubber roll according to claim 7, wherein The auxiliary plate (11) is connected in the dip tube (15), the auxiliary plate (11) is circular rubber plate, the circular profile of the auxiliary plate (11) is consistent with the cavity shape of the dip tube (15), the auxiliary plate (11) is close in the bending part of the dip tube (15), and is deflected in the dip tube (15), the auxiliary plate (11) is slightly deflected upward along the cavity of the dip tube (15), the auxiliary hole (25) is formed in the auxiliary plate (11), when the dip tube (15) is flattened in the gap (14), the auxiliary plate (11) continues to deflect upward and further closes the dip tube (15).

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