External anti-slip parts

Abstract

This invention relates to an external anti-detachment component. The external anti-detachment component includes a fixing head, a hook protruding towards the axis, and a connecting portion fixedly connected between the fixing head and the hook. The fixing head is detachably connected to one of the outer peripheral surfaces of a first pipe and a second pipe, and can move along with the first or second pipe to which the fixing head is located. The connecting portion is outside the second pipe, and has at least one radially elastic portion. The distance from the free end of the hook to its central axis is less than the distance from the top of the protrusion on the first or second pipe to its central axis. When the anti-detachment component moves towards the protrusion, the connecting portion and the hook are elastically separated by the protrusion. After release, the connecting portion drives the hook to engage in the recess of the first or second pipe. This invention provides an external locking mechanism for forming pipes, solving the problems of inaccurate positioning during pipe splicing and the cumbersome replacement of anti-detachment components.

Description

Technical Field

[0001] This invention relates to the field of pipes, and in particular to an external anti-detachment component. Background Technology

[0002] Corrugated pipes are widely used in drainage systems due to their advantages such as good compressive strength, low construction cost, light weight, and quick and convenient installation. For ease of transportation, each section of corrugated pipe cannot be too long; they are connected at the construction site. Current corrugated pipe connection methods are generally plug-in or flange connections. Traditional pipe connection methods cannot withstand axial tensile forces, and they involve many components, making installation cumbersome and resulting in high construction costs.

[0003] Furthermore, Chinese utility model patent application number CN201921861728.8 discloses a pipe assembly with an anti-detachment sealing structure to overcome the aforementioned shortcomings. It includes a spigot, a socket, and an external anti-detachment component to prevent rebound. The external anti-detachment component is an internal anti-detachment mechanism, meaning its elastic anti-detachment body is engaged in a groove on the inner circumferential wall of the socket to prevent axial rebound. This internal anti-detachment installation structure has the following disadvantages: 1. During pipe splicing, it is installed internally, making accurate positioning impossible and visually observable, which can easily lead to excessive force and pipe damage. 2. When the external anti-detachment component is damaged or needs replacement for other reasons, the operation is complex, requiring forcibly pulling the spigot section relative to the socket section, which can easily damage the external anti-detachment component. Summary of the Invention

[0004] The purpose of this invention is to overcome the above-mentioned shortcomings by providing an external anti-detachment component for forming an external clamping connection of the pipe, thereby solving the problems of inaccurate positioning during pipe splicing and cumbersome replacement of the anti-detachment component.

[0005] The present invention is achieved through the following technical solution: an external anti-detachment component for connecting a first pipe and a second pipe, characterized in that: the external anti-detachment component includes a fixing head, a hook head protruding towards the axis, and a connecting part fixedly connected between the fixing head and the hook head, wherein the fixing head is detachably connected to one of the outer peripheral surfaces of the first pipe and the second pipe, and can move together with the first pipe or the second pipe to which the fixing head is located;

[0006] The connecting part is outside the second pipe, and the connecting part has at least one section of radially elastic part. The distance from the free end of the hook to its central axis is less than the distance from the top of the protrusion on the first or second pipe to the central axis. When the anti-detachment component moves towards the protrusion, the connecting part and the hook are elastically opened by the protrusion. After release, the connecting part drives the hook to be inserted into the recess of the first or second pipe.

[0007] Furthermore, the inner wall of the connecting part is elastically pressed against the protrusion.

[0008] Furthermore, at least one section of the hook head is elastic.

[0009] Furthermore, the angle γ between the inner wall of the hook head and the inner wall of the connecting part is less than 90°.

[0010] Furthermore, a blocking part protruding towards the axis is provided on the side of the hook head away from the fixed head. The blocking part is fixedly installed with the connecting part, and a deformation space is reserved between the blocking part and the hook head.

[0011] Furthermore, the connecting part is bent, and the included angle θ of the inner wall of the bent part is: 90° < θ < 180°.

[0012] Furthermore, the inner wall of the connecting part is provided with an outwardly protruding curved part, and the curved part is elastic.

[0013] Furthermore, the fixing head has a circular ring structure, which is composed of two or more arc-shaped components, and adjacent arc-shaped components are connected by bolts.

[0014] Furthermore, the hook head and the connecting part constitute a hook body component, and multiple hook components are spaced apart along the circumferential direction on the fixed head.

[0015] The anti-detachment component consists of a fixing head, a connecting part, and a hook. The fixing head is detachably installed on one of the outer surfaces of the first and second pipes. The installation position of the anti-detachment component is exposed externally, making replacement simple. When the first or second pipe moves towards each other, the protrusion on either pipe can open the hook component. After installation, the hook engages with the recess. Because both the recess and the corresponding hook are located externally, the installation positioning is accurate and visually observable. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of Example 1;

[0017] Figure 2 This is an assembly diagram of Example 1;

[0018] Figure 3 This is a schematic diagram of the combined state of Example 1. Figure 1 ;

[0019] Figure 4 This is a schematic diagram of the overall structure of Example 1. Figure 1 ;

[0020] Figure 5 This is a partial structural diagram of the combined state of Embodiment 1;

[0021] Figure 6 This is a schematic diagram of the anti-detachment component in Example 1. Figure 1 ;

[0022] Figure 7 This is a schematic diagram of the anti-detachment component in Example 1. Figure 2 ;

[0023] Figure 8 This is a schematic diagram of the anti-detachment component in Example 1. Figure 3 ;

[0024] Figure 9 This is a schematic diagram of the anti-detachment component in Example 1. Figure 4 ;

[0025] Figure 10 This is a schematic diagram of the anti-detachment component in Example 1. Figure 5 ;

[0026] Figure 11 This is a schematic diagram of the combined state of Example 1. Figure 2 ;

[0027] Figure 12 This is a schematic diagram of the overall structure of Example 1. Figure 2 ;

[0028] Figure 13 This is a schematic diagram of the combined state of Example 1. Figure 3 ;

[0029] Figure 14 This is a schematic diagram of the structure of Example 2;

[0030] Figure 15 This is a schematic diagram of the combined state of Example 2. Figure 1 ;

[0031] Figure 16 This is a schematic diagram of the overall structure of Example 2. Figure 1 ;

[0032] Figure 17 This is a schematic diagram of the anti-detachment component in Example 2. Figure 1 ;

[0033] Figure 18 This is a schematic diagram of the anti-detachment component in Example 2. Figure 2 ;

[0034] Figure 19 This is a schematic diagram of the anti-detachment component in the normal installation state in Example 2. Figure 1 ;

[0035] Figure 20 This is a schematic diagram of the anti-detachment component in the stretched state in Example 2. Figure 1 ;

[0036] Figure 21 This is a schematic diagram of the anti-detachment component in the normal installation state in Example 2. Figure 2;

[0037] Figure 22 This is a schematic diagram of the anti-detachment component in the stretched state in Example 2. Figure 2 ;

[0038] Figure 23 This is a schematic diagram of the combined state of Example 2. Figure 2 ;

[0039] Figure 24 This is a schematic diagram of the overall structure of Example 2. Figure 2 ;

[0040] Figure 25 This is a schematic diagram of the combined state of Example 2. Figure 3 .

[0041] Labeling Explanation: 1-First pipe, 11-Recessed portion, 12-Protruding portion, 121-Beveled surface, 13-Mounting groove, 2-Second pipe, 21-Recessed portion, 22-Protruding portion, 221-Beveled surface, 23-Mounting groove, 24-Corrugated section, 3-Anti-detachment component, 31-Fixing head, 32-Hook head, 33-Connection part, 34-Blocking part, 341-Inner wall, 342-Outer wall, 35-Bend part, 36-Annular component, 4-Sealing ring, 5-Pipe body, 6-Connection section. Detailed Implementation

[0042] The present invention will now be described in detail with reference to the accompanying drawings:

[0043] Example 1:

[0044] This embodiment relates to an external anti-detachment component for connecting a first pipe 1 and a second pipe 2, such as... Figure 1-3 As shown, the inner diameter of one end or all of the second pipe 2 is larger than the outer diameter of one end or all of the first pipe 1, so that the first pipe 1 can be inserted into the second pipe 2 during the splicing process of the two pipes.

[0045] The anti-detachment component 3 is composed of a fixing head 31, a hook head 32 and a connecting part 33, wherein the connecting part 33 is connected between the fixing head 31 and the hook head 32, the fixing head 31 is a fixed end, and the anti-detachment component 3 is detachably connected to the first pipe 1 through the fixing head 31. When the first pipe 1 moves relative to the second pipe 2, the anti-detachment component 3 moves with the first pipe 1.

[0046] The connecting portion 33 is recessed outside the second pipe 2, and at least one portion of the connecting portion 33 is an elastic portion, allowing the connecting portion 33 to undergo radial elastic deformation at this elastic portion. Preferably, the elastic portion is located at the connection point between the connecting portion 33 and the fixing head 31. Another preferred embodiment is that all portions 33 are elastic. Yet another preferred embodiment is... Figure 9As shown, the connecting part 33 is provided with a curved part 35 that bends outward from the inner wall, and the elastic part is located at the connection position between the connecting part 33 and the curved part 35.

[0047] The second tube 2 has a recessed portion 21 on its outer surface that is recessed towards its axis. The recessed portion 21 is used to engage the hook head 32 of the anti-detachment component 3. The second tube 2 has an outwardly protruding protrusion 22 between the recessed portion 21 and the end position of the second tube 2. The distance from the free end of the hook head 32 to its central axis is greater than the distance from the top of the protrusion 22 to its central axis. When the first tube 1 and the second tube 2 move towards each other, if the second tube 2 is fixed, during the process of the first tube 1 being inserted into the second tube 2, the protrusion 22 pushes the hook head 32 outward. The hook head transmits the applied force to the connecting portion 33, causing the connecting portion 33 to elastically deform outward. When the hook head passes the position of the protrusion 22 and reaches the recessed portion 21, the connecting portion 33 elastically resets, causing the hook head 32 to engage in the recessed portion 21. The connecting portion 33 also wraps around the protrusion 22, forming a positioning and anti-detachment mechanism.

[0048] Since the anti-detachment component 3 is installed outside the second pipe 2, the replacement of the anti-detachment component 3 is simple, and the connection process between the hook 32 and the recess 21 can be observed with the naked eye, making the installation and positioning more accurate.

[0049] As a further improvement, such as Figure 5 , 9 As shown, the connecting part 33 is continuously and elastically fastened onto the inclined surface 221 of the protrusion 22. Because the connecting part 33 continuously and elastically fastens onto the protrusion 22, it applies a downward pressure to the protrusion 22, resulting in better stability of the entire external anti-detachment structure after installation. Compared to rigid fastening, elastic fastening provides a flexible connection, making the anti-detachment component less prone to being forcibly pulled off after installation.

[0050] The specific connection part 33 can be elastically clamped in various ways; as a preferred method, such as... Figure 5 As shown, the angle α between the inner wall of the inclined handle (i.e., the connecting part 33) and the horizontal line is smaller than the angle β between the inclined surface 221 of the protrusion 22 and the horizontal line. The elastic part is located at the connection position between the connecting part 33 and the fixing head 31. Figure 2 As shown, the maximum inner diameter D1 of the inner wall of the connecting part 33 is smaller than the maximum outer diameter D2 of the protrusion 22.

[0051] To create multiple points to prevent hair loss, such as Figure 1-2As shown, the number of connecting portions 33 and hooks 32 on the anti-detachment component 3 is two or more, and they are distributed at intervals along the circumferential direction, preferably evenly spaced. Correspondingly, to accommodate the setting of the anti-detachment component 3, the recessed portion 21 on the second tube 2 is an annular groove or an intermittently arranged arc-shaped groove, and the protrusion 22 is an annular protrusion or an intermittently arranged arc-shaped protrusion. When there are multiple connecting portions 33 and hooks 32, the hooks 32 form multi-point engagement, and the connecting portions 33 form multi-point clamping in the circumferential direction, resulting in better wrapping performance. When the recessed portion 21 is an arc-shaped groove and / or the protrusion 22 is an arc-shaped protrusion, after the anti-detachment component 3 is installed in place, the first tube 1 and the second tube 2 cannot rotate around the axis.

[0052] The mounting method of the fixing head 31 can be varied; as a preferred method, such as... Figure 6 As shown, the fixing head 31 has a ring structure, which is composed of two or more arc-shaped components. The two adjacent arc-shaped components are connected by bolts. The ring structure is installed in an annular mounting groove 13 of the first pipe 1.

[0053] Another preferred method, such as Figure 7 As shown, the fixing head 31 has a C-shaped structure with an angle greater than 180°, and is installed into an annular mounting groove 13 of the first pipe 1 through the notch of the C-shaped structure.

[0054] Another preferred method, such as Figure 8 As shown, the fixing head 31 is a single structure, and each fixing head 31 is connected together by an annular component 36. The annular component is installed in an annular mounting groove 13 of the first pipe 1, wherein the annular component 36 can be a hoop, cable tie or other.

[0055] As a further improvement, such as Figure 10 As shown, at least one part of the hook head 32 is elastic, allowing the hook head 32 to swing left and right at the elastic part under the action of external force. This ensures that the pipe retains the advantage of flexible connection even after being given anti-detachment function, despite being subjected to external forces such as geological subsidence or thermal expansion and contraction. Preferably, the elastic position on the hook head 32 is located at the connection between the hook head 32 and the connecting part 33, or the entire hook head is elastic.

[0056] Furthermore, such as Figure 10 As shown, in order to allow for a larger swing range, the included angle γ between the inner wall of the hook head 32 and the inner wall of the connecting part 33 is less than 90°;

[0057] Furthermore, such as Figure 10As shown, a blocking portion 34 protruding towards the axis is provided on the side of the hook head 32 away from the fixed head 31. The blocking portion 34 is fixedly installed with the connecting portion 33, and a space is reserved between the blocking portion 34 and the hook head 32. The inner wall 341 of the blocking portion 34 serves as a limit to prevent the hook head 32 from being pulled off. Since the pipe is buried underground, the outer wall 342 of the blocking portion 34 serves to block soil, preventing soil from entering the space between the hook head 32 and the blocking portion 34, thereby jamming the hook head 32.

[0058] As a further improvement, such as Figure 9 As shown, the inner wall of the connecting part 33 is provided with an outwardly protruding curved part 35. The curved part 35 has a certain degree of elasticity and can resist the stretching caused by geological subsidence or thermal expansion and contraction.

[0059] Example 2:

[0060] This embodiment relates to an external anti-detachment component for connecting a first pipe 1 and a second pipe 2, such as... Figure 1-3 As shown, the inner diameter of one end or all of the second pipe 2 is larger than the outer diameter of one end or all of the first pipe 1, so that the first pipe 1 can be inserted into the second pipe 2 during the splicing process of the two pipes.

[0061] The anti-detachment component 3 consists of a fixing head 31, a hook head 32, and a connecting part 33, wherein the connecting part 33 is connected between the fixing head 31 and the hook head 32, the fixing head 31 is a fixing end, and the anti-detachment component 3 is detachably connected to the second pipe 2 through the fixing head 31.

[0062] The connecting portion 33 is excluded from the second pipe 2, and at least one part of the connecting portion 33 is an elastic part, allowing the connecting portion 33 to undergo elastic deformation up and down at the elastic part. Preferably, the elastic part is located at the connection position between the connecting portion 33 and the fixing head 31. In another preferred embodiment, all parts of the connecting portion 33 are elastic.

[0063] The first tube 1 has a recessed portion 11 on its outer surface that is recessed towards its axis. The recessed portion 11 is used to engage the hook head 32 of the anti-detachment component 3. The first tube 1 has an outwardly protruding protrusion 12 between the recessed portion 11 and the port position of the second tube 2. The distance between the top of the protrusion 12 and its central axis is greater than the distance from the free end of the hook head 32 to its central axis. When the first tube 1 and the second tube 2 move towards each other, if the second tube 2 is fixed, during the process of the first tube 1 being inserted into the second tube 2, the protrusion 12 pushes the hook head 32 outward. The hook head transmits the applied force to the connecting portion 33, causing the connecting portion 33 to elastically deform outward. When the hook head passes the position of the protrusion 12 and reaches the recessed portion 11, the connecting portion 33 elastically resets and drives the hook head to engage in the recessed portion 11. The connecting portion 33 also wraps around the protrusion 12, forming a positioning and anti-detachment mechanism.

[0064] Since the anti-detachment component 3 is installed outside the second pipe 2, the replacement of the anti-detachment component 3 is simple, and the connection process between the hook 32 and the recess 11 can be observed with the naked eye, making the installation and positioning more accurate.

[0065] To create multiple points to prevent hair loss, such as Figure 17 As shown, the number of connecting portions 33 and hooks 32 on the anti-detachment component 3 is two or more, and they are distributed at intervals along the circumferential direction, preferably evenly spaced. Correspondingly, to accommodate the setting of the anti-detachment component 3, the recessed portion 11 on the first tube 1 is an annular groove or an intermittently arranged arc-shaped groove, and the protrusion 12 is an annular protrusion or an intermittently arranged arc-shaped protrusion. When there are multiple connecting portions 33 and hooks 32, the hooks form multi-point engagement, and the connecting portions 33 form multi-point clamping in the circumferential direction, resulting in better wrapping performance. When the recessed portion 11 is an arc-shaped groove and / or the protrusion 12 is an arc-shaped protrusion, after the anti-detachment component 3 is installed in place, the first tube 1 and the second tube 2 cannot rotate around the axis.

[0066] The mounting method of the fixing head 31 can be varied; as a preferred method, such as... Figure 17 As shown, the fixing head 31 has a ring structure, which is composed of two or more arc-shaped components. The two adjacent arc-shaped components are connected by bolts. The ring structure is installed in an annular mounting groove 23 of the first pipe 1.

[0067] Another preferred method, such as Figure 18 As shown, the fixing head 31 has a C-shaped structure with an angle greater than 180°, and is installed into an annular mounting groove 23 of the first pipe 1 through the notch of the C-shaped structure.

[0068] In another preferred embodiment, the fixing head 31 is a single structure, and each fixing head 31 is connected together by an annular component 36. The annular component 36 is installed in an annular mounting groove 23 of the first pipe 1, wherein the annular component can be a hoop, cable tie or other.

[0069] As a further improvement, such as Figure 18-19 As shown, at least one part of the hook head 32 is elastic, allowing the hook head 32 to swing left and right at the elastic part under the action of external force. This ensures that the pipe retains the advantage of flexible connection even after being given anti-detachment function, despite being subjected to external forces such as geological subsidence or thermal expansion and contraction. Preferably, the elastic position on the hook head 32 is located at the connection between the hook head 32 and the connecting part 33, or the entire hook head is elastic.

[0070] Furthermore, such as Figure 18-19As shown, in order to reserve a larger swing radius space, the included angle γ between the inner wall of the hook head 32 and the inner wall of the connecting part 33 is less than 90°;

[0071] Furthermore, such as Figure 20-21 As shown, a blocking portion 34 protruding towards the axis is provided on the side of the hook head 32 away from the fixed head 31. The blocking portion 34 is fixedly installed with the connecting portion 33, and a space is reserved between the blocking portion 34 and the hook head 32. The inner wall 341 of the blocking portion 34 serves as a limit to prevent the hook head 32 from being pulled off. Since the pipe is buried underground, the outer wall 342 of the blocking portion 34 serves to block soil, preventing soil from entering the space between the hook head 32 and the blocking portion 34, thereby jamming the hook head 32.

[0072] Furthermore, such as Figure 1-2 As shown, the connecting part 33 is bent, and the included angle θ of the bent part is 90°-180°. Since the connecting part 33 is a bent structure, the elastic deformation part is at the bent position. Therefore, the force required to open the connecting part 33 by the hook 32 is greatly increased.

[0073] To ensure a tight seal between the first pipe 1 and the second pipe 2, such as Figure 15 As shown, a sealing ring 4 is also installed between the first pipe 1 and the second pipe 2.

[0074] Although the present invention has been illustrated and described through specific embodiments and alternative methods, it should be understood that various changes and modifications may be made without departing from the spirit and scope of the invention. Therefore, it should be understood that the present invention is not limited in any sense except by the appended claims and their equivalents.

Claims

1. An outer release for connecting a first pipe (1) and a second pipe (2), characterized in that: The outer anti-off piece (3) comprises a fixed head (31), a hook head (32) protruding towards the direction of the axis, and a connecting part (33) fixedly connected between the fixed head (31) and the hook head (32), the fixed head (31) is used for detachable connection on one of the outer circumferential surface of the first pipe (1) and the outer circumferential surface of the second pipe (2), and can move together with the first pipe (1) or the second pipe (2) where the fixed head (31) is located; The connecting part (33) is avoided outside the second pipe (2), and at least one elastic part with a radial elastic change is arranged on the connecting part (33), the distance from the free end of the hook head (32) to the central axis is less than the distance from the top end of the protruding part (22, 12) on the first pipe (1) or the second pipe (2) to the central axis, when the anti-off piece (3) moves towards the protruding part (22, 12), the connecting part (33) and the hook head (32) are elastically separated by the protruding part (22, 12), and after release, the connecting part (33) drives the hook head (32) to be clamped into the recessed part (21, 11) of the first pipe (1) or the second pipe (2); At least one part of the hook head (32) has elasticity; A blocking part (34) protruding towards the direction of the axis is arranged on the side of the hook head (32) away from the fixed head (31), the blocking part (34) is fixedly arranged with the connecting part (33), and a deformation space is reserved between the blocking part (34) and the hook head (32); the outer side wall (342) of the blocking part (34) plays a role of blocking soil; the included angle γ between the inner wall of the hook head (32) and the inner wall of the connecting part (33) is less than 90°; and the inner wall of the connecting part (33) is elastically buckled on the protruding part (22).

2. The outer detachment preventer of claim 1, wherein: The connecting part (33) is arranged in a bending mode, and the included angle θ of the inner wall of the bending part is 90°<θ<180°.

3. The outer detachment preventer of claim 1, wherein: The inner wall of the connecting part (33) is provided with an outward protruding bending part (35), and the bending part (35) has elasticity.

4. The outer detachment preventer of claim 1, wherein: The fixed head (31) is in a circular ring structure, and the circular ring structure is composed of two or more than two arc-shaped parts, and adjacent two arc-shaped parts are connected through bolts.

5. The outer denailer of claim 4, wherein: The hook head (32) and the connecting part (33) form a hook body part, and a plurality of hook body parts are arranged on the fixed head (31) in a circumferential direction.

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