Tension control device for winding sealing tape

Abstract

The utility model provides a tension control device for winding a sealing tape, which comprises a shell with an opening at one end, a mounting shaft is arranged inside the shell, a first through hole is arranged on the mounting shaft, the first through hole penetrates through the mounting shaft and the shell, a belt wheel wound with the sealing tape can be sleeved on the mounting shaft, and the sealing tape is wound on the belt wheel. A protrusion is arranged on the outer cylindrical face of the mounting shaft and abuts against the inner wall of a second through hole in the belt wheel, when the sealing belt is wound, the sealing belt drives the belt wheel to rotate around the mounting shaft, the inner wall of the second through hole in the belt wheel and the protrusion generate relative displacement, and then the inner wall of the second through hole in the belt wheel and the protrusion generate friction resistance. The friction resistance can be transmitted to the sealing belt through the belt wheel, then the tension of the sealing belt can be controlled through the friction resistance, when a worker winds the sealing belt on a pipeline, the sealing belt can continuously and stably keep certain tension, the sealing belt cannot be too loose or too tight, the winding quality is improved, winding of the worker is facilitated, and meanwhile the winding work efficiency is greatly improved.

Description

Technical Field

[0001] This utility model relates to the technical field of sealing tape accessories, and more specifically, to a tension control device for sealing tape winding. Background Technology

[0002] Sealing tape is a strip-shaped product used to seal gaps at pipe joints. Common examples include PTFE tape. Currently, sealing tape is often pre-wound onto a pulley. When wrapping the sealing tape around a pipe joint, the worker first places the beginning of the sealing tape against the pipe, then manually rotates the pulley around the pipe, causing the sealing tape to wrap around the pipe in circles. To ensure a tight wrap, the worker needs to pull the sealing tape taut by hand to maintain a certain tension. However, the force applied by the worker's hand during wrapping cannot be consistently uniform, resulting in insufficient tension on the sealing tape at times. Consequently, the sealing tape wraps loosely around the pipe, significantly reducing the sealing effect. Therefore, overcoming the shortcomings of the existing technology is a problem that urgently needs to be solved in this technical field. Utility Model Content

[0003] This invention provides a tension control device for sealing tape winding, which aims to improve the problem that existing sealing tape pulleys cannot maintain a certain tension when winding.

[0004] To achieve the above objectives, this utility model provides a tension control device for sealing tape winding, the specific technical solution of which is as follows:

[0005] The device includes a housing with an opening at one end, and an installation shaft inside the housing. The installation shaft has a first through hole that passes through the installation shaft and the housing. A pulley wrapped with a sealing strip can be fitted onto the installation shaft. A protrusion is provided on the outer cylindrical surface of the installation shaft. The protrusion abuts against the inner wall of the second through hole on the pulley. When the sealing strip is wrapped, the sealing strip drives the pulley to rotate around the installation shaft. The inner wall of the second through hole on the pulley and the protrusion are relatively displaced, thereby generating frictional resistance. This frictional resistance can be transmitted to the sealing strip through the pulley, and thus the frictional resistance can control the tension of the sealing strip.

[0006] In one embodiment, the shell wall of the housing has a discharge port, and the sealing belt of the pulley mounted on the housing can pass through the discharge port from the inside of the housing to the outside.

[0007] In one embodiment, at least two dividing openings are provided on the side wall of the mounting shaft, and a spring piece is formed between the at least two dividing openings. A baffle is provided at the end of the spring piece, and the baffle can restrict the pulley on the mounting shaft.

[0008] In one embodiment, the second through hole is provided with a groove adapted to the protrusion, the protrusion being accommodated within the groove.

[0009] In one embodiment, the protrusion is a protruding rib.

[0010] In one embodiment, the protrusion is a dot.

[0011] In one embodiment, multiple protrusions are provided, and the multiple protrusions are evenly distributed on the outer cylindrical surface of the mounting shaft.

[0012] The beneficial effects of this embodiment are:

[0013] When sealing tape needs to be wrapped, one end of the sealing tape is placed on the pipe. Then, the worker inserts their fingers into the first through hole on the mounting shaft and uses their fingers to rotate the housing and pulley around the pipe. This causes the sealing tape on the pulley to pull the pulley inside the housing to rotate around the mounting shaft. The inner wall of the second through hole on the pulley and the protrusion on the outer side of the mounting shaft move relative to each other, and the protrusion comes into close contact with the inner wall of the second through hole. Therefore, friction is generated between the two, and this friction generates a backward pulling force on the pulley. Through the transmission of force, the pulley exerts a backward pulling force on the sealing tape, thus tightening the sealing tape. Since the friction between the protrusion and the pulley is continuous and uniform, the tension on the sealing tape on the pulley is also continuous and uniform. Therefore, when the worker wraps the sealing tape around the pipe, the sealing tape can maintain a certain tension continuously and stably. The sealing tape will not be too loose or too tight, which improves the wrapping quality of the sealing tape, makes it easier for workers to wrap, and greatly improves the wrapping efficiency. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the common process of winding pulley sealing tape on the market;

[0016] Figure 2 A schematic diagram of the sealing tape winding process provided for an embodiment of this utility model. Figure 1 ;

[0017] Figure 3 A schematic diagram of the sealing tape winding process provided for an embodiment of this utility model. Figure 2 ;

[0018] Figure 4A schematic diagram of the housing and pulley assembly provided for an embodiment of this utility model;

[0019] Figure 5 A schematic diagram showing the housing and pulley in a separated state provided for an embodiment of this utility model;

[0020] Figure 6 Schematic diagram of the shell structure provided for the embodiment of this utility model Figure 1 ;

[0021] Figure 7 A schematic diagram of the pulley structure provided for an embodiment of this utility model;

[0022] Figure 8 A cross-sectional view of the housing and pulley assembly provided for an embodiment of this utility model;

[0023] Figure 9 Schematic diagram of the shell structure provided for the embodiment of this utility model Figure 2 .

[0024] Explanation of reference numerals in the attached figures:

[0025] 100. Housing; 110. Mounting shaft; 111. First through hole; 112. Protrusion; 113. Dividing port; 114. Spring piece; 1141. Baffle; 120. Discharge port;

[0026] 200, pulley; 210, second through hole; 211, groove. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0028] The technical solutions provided by the embodiments of this utility model are described below with reference to the accompanying drawings.

[0029] Please see Figure 1-9A tension control device for sealing tape winding includes a housing 100 with an opening at one end. The housing 100 is circular. Specifically, the housing 100 has an internal cavity for housing a pulley 200 wound with sealing tape (such as PTFE tape). The housing 100 is preferably made of plastic, but metal can also be used. A discharge port 120 is provided on the housing wall of the housing 100. The width of the discharge port 120 is greater than the width of the sealing tape. This allows the sealing tape of the pulley 200 installed inside the housing 100 to pass through the discharge port 120 from the inside of the housing 100 to the outside, and then be wound onto the pipe, facilitating the discharge of the sealing tape from the pulley 200.

[0030] An integrally formed mounting shaft 110 is provided inside the housing 100. The mounting shaft 110 is coaxial with the housing 100. A first through hole 111 is provided in the middle of the mounting shaft 110. The first through hole 111 is coaxial with the mounting shaft 110 and passes through the mounting shaft 110 and the housing 100. When wrapping the sealing tape on the pipe, the worker can insert his / her fingers into the first through hole 111, thereby using his / her fingers to drive the housing 100 to rotate around the pipe to be wrapped. This greatly facilitates the worker to wrap the sealing tape by hand and improves the work efficiency of wrapping the sealing tape.

[0031] A second through hole 210 is provided in the middle of the pulley 200 wrapped with sealing tape. The diameter of the second through hole 210 is slightly larger than the diameter of the mounting shaft 110, so that the pulley 200 can be fitted onto the mounting shaft 110 through the second through hole 210. A protrusion 112 is provided on the outer cylindrical surface of the mounting shaft 110. Preferably, multiple protrusions 112 are provided, and the multiple protrusions 112 are evenly distributed on the outer cylindrical surface of the mounting shaft 110. When the pulley 200 is inserted into the mounting shaft 110, the protrusions 112 abut tightly against the inner wall of the second through hole 210 on the pulley 200. It should be noted that the protrusions 112 can be protruding ribs (such as...). Figure 6 As shown), it can also be a protrusion or a boss (such as...). Figure 9As shown in the figure, any structure that can abut against the inner wall of the second through hole 210 on the pulley 200 is considered to be the protrusion 112 structure referred to in this application. The contact force between the protrusion 112 and the inner wall of the second through hole 210 on the pulley 200 should not be too large or too small. It should ensure that the pulley 200 can rotate around the mounting shaft 110 within the housing 100, but the rotation should not be too easy. When the pulley 200 rotates, it needs to have a certain backward resistance force so that the sealing strip can be pulled backward through the resistance force, so that the sealing strip has a certain backward tension during the winding process, thereby ensuring that the sealing strip is always subjected to a certain appropriate tension during the winding process, thereby tightening the sealing strip and improving the winding quality of the sealing strip. The specific size of the resistance force is common knowledge to those skilled in the art. The required size of the resistance force varies depending on the product being wound and the material of the sealing strip. Therefore, the size of the resistance force is not specified here, and those skilled in the art can set it according to the specific situation.

[0032] Specifically, when the sealing tape is wound, under the pull of the sealing tape, the sealing tape drives the pulley 200 to rotate around the mounting shaft 110. The inner wall of the second through hole 210 on the pulley 200 and the protrusion 112 are relatively displaced, thereby generating frictional resistance. This frictional resistance can be transmitted to the sealing tape through the pulley 200, thereby generating a backward pulling force on the sealing tape. This backward pulling force can control the tension on the sealing tape, so that the sealing tape is always subjected to a certain appropriate tension. This tension always keeps the sealing tape taut, avoiding the sealing tape being too loose or too tight during the winding process, thereby greatly improving the winding quality and the sealing effect of the sealing tape.

[0033] Preferably, a groove 211 adapted to the protrusion 112 is provided on the inner wall of the second through hole 210 on the pulley 200 (e.g., Figure 7 As shown, the volume of the groove 211 is larger than that of the protrusion 112, so the protrusion 112 can be accommodated in the groove 211. The purpose of setting the groove 211 is that when the protrusion 112 on the mounting shaft 110 rotates to the position of the groove 211, the protrusion 112 will enter the groove 211. At this time, the protrusion 112 will not abut against the inner wall of the pulley 200 due to the setting of the groove 211, so the friction between the two disappears, and the pulley 200 rotates more easily. This makes it easier for the sealing strip to drive the pulley 200 to rotate, and avoids the phenomenon that the protrusion 112 always abuts against the inner wall of the pulley 200, resulting in excessive friction between the two, excessive resistance to the sealing strip, and causing the pulley 200 to rotate unevenly.

[0034] The pulley 200 is installed onto the housing 100. The sealing strip on the pulley 200 passes through the outlet 120 of the housing 100, and then the pipe is wound. When the winding stops, due to the frictional resistance between the protrusion 112 on the mounting shaft 110 and the inner wall of the pulley 200, the pulley 200 is confined within the housing 100. Without the application of external force, the pulley 200 will not rotate relative to the housing 100. Therefore, when winding the pipe, the operator does not need to hold the pulley 200 with both hands; the hands can be removed from the pulley 200 at any time. After releasing the hand, the sealing strip will not come into contact with the inside of the device. The original design separated from the pulley 200, thus maintaining a certain tension on the sealing strip, ensuring a tight wrap around the pipe. However, the current market only uses pulley 200 for wrapping, requiring operators to constantly control the pulley 200 by hand. This is because the pulley 200 lacks any structure to restrict its free rotation. If the operator removes their hand from the pulley 200, it will rotate freely, causing the sealing strip to separate from the pulley 200. This results in the sealing strip losing or weakening its tension, leading to a loose wrap around the pipe and making it very inconvenient to use.

[0035] It should be noted that at least two dividing openings 113 are provided on the side wall of the mounting shaft 110, and a spring piece 114 is formed between the at least two dividing openings 113. The dividing openings 113 separate and isolate the two sides of the spring piece 114 from the shaft wall of the mounting shaft 110, thereby reducing the stress on the spring piece 114 from the shaft wall of the mounting shaft 110, thus increasing the elasticity of the spring piece 114 and increasing its degree of bending deformation. A baffle 1141 is provided at the end of the spring piece 114. The baffle 1141 can restrict and block the pulley 200 on the mounting shaft 110. When it is necessary to remove or install the pulley 200 on the housing 100, the spring piece 114 is pressed down by hand, thereby causing the spring piece 114 to drive the baffle 1141 towards the mounting shaft 110. The shaft 110 moves along its axis, allowing the baffle 1141 to enter the second through hole 210 on the pulley 200. This prevents the baffle 1141 from obstructing the installation or removal of the pulley 200 from the shaft 110. After the pulley 200 is installed or removed, the spring 114 is released. Under the elastic force of the spring 114, it causes the baffle 1141 to spring back to its initial position. The baffle 1141 blocks the outside of the pulley 200. With the action of the bottom surface of the housing 100 and the baffle 1141, the pulley 200 is clamped between them, thus blocking the pulley 200 inserted on the shaft 110 and preventing it from slipping off, thus providing a limiting and blocking function.

[0036] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0038] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A tension control device for sealing tape winding, characterized in that, The device includes a housing (100) with an opening at one end. An installation shaft (110) is provided inside the housing (100). A first through hole (111) is provided on the installation shaft (110). The first through hole (111) passes through the installation shaft (110) and the housing (100). A pulley (200) wrapped with a sealing strip can be fitted onto the installation shaft (110). A protrusion (112) is provided on the outer cylindrical surface of the installation shaft (110). The protrusion (112) abuts against the inner wall of the second through hole (210) on the pulley (200). When the sealing strip is wrapped, the sealing strip drives the pulley (200) to rotate around the installation shaft (110). The inner wall of the second through hole (210) on the pulley (200) and the protrusion (112) are relatively displaced, thereby generating frictional resistance. This frictional resistance can be transmitted to the sealing strip through the pulley (200), and thus the frictional resistance can control the tension of the sealing strip.

2. The tension control device for sealing tape winding according to claim 1, characterized in that, The shell wall of the housing (100) is provided with a discharge port (120), and the sealing strip of the pulley (200) installed on the housing (100) can pass through the discharge port (120) from the inside of the housing (100) to the outside.

3. The tension control device for sealing tape winding according to claim 1, characterized in that, At least two dividing openings (113) are provided on the side wall of the mounting shaft (110), and a spring piece (114) is formed between the at least two dividing openings (113). A baffle (1141) is provided at the end of the spring piece (114), and the baffle (1141) can restrict the pulley (200) on the mounting shaft (110).

4. The tension control device for sealing tape winding according to claim 1, characterized in that, The second through hole (210) is provided with a groove (211) that is adapted to the protrusion (112), and the protrusion (112) can be accommodated in the groove (211).

5. The tension control device for sealing tape winding according to claim 1, characterized in that, The protrusion (112) is a protruding rib.

6. The tension control device for sealing tape winding according to claim 1, characterized in that, The protrusion (112) is a protrusion point.

7. The tension control device for sealing tape winding according to claim 1, characterized in that, The protrusions (112) are provided in multiple ways, and the multiple protrusions (112) are evenly distributed on the outer cylindrical surface of the mounting shaft (110).

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