Expansion traction bolt piece

Abstract

An expansion traction bolt piece comprises an expansion piece body, a nut, a first sliding block, a second sliding block and a connecting nail. Symmetrical guide faces are arranged on the two opposite side faces of the expansion piece body in the axial direction, the two guide faces are obliquely arranged in the axial direction, and a sliding groove communicating with the two guide faces is formed in the expansion piece body. A stud is arranged at one end, close to each other, of the two guide surfaces; the nut is used for being assembled on the stud; the first sliding block and the second sliding block are symmetrically arranged on the two guide faces in a sliding fit mode. The connecting nail penetrates through the sliding groove in a clearance fit mode and is connected between the first sliding block and the second sliding block. A set shape is defined by the peripheral faces of the first sliding block, the expansion piece body and the second sliding block. The embodiment of the invention can be suitable for implementing axial traction operation on the pipe fitting, is uniform in stress and stable in anchoring, does not damage the pipe fitting, is adaptive to a multi-pipe-diameter scene, can be repeatedly used, can be simultaneously suitable for an application scene of an expansion bolt, is expanded and fastened, does not damage a base body, and can be repeatedly used.

Description

Technical Field

[0001] This application relates to the field of building construction technology, and in particular to an expansion tension bolt. Background Technology

[0002] Pipe jacking technology, as a core trenchless method for underground pipe laying, requires anchorage traction assistance for long-distance jacking or minor deviation adjustments. Sleeve-type pre-embedded pipes are widely used in building walls and concrete substrates, requiring the removal of functional pipes for later maintenance. Existing traction methods mostly employ threaded anchors, flange connections, or steel cable binding, which have significant drawbacks: threaded anchors are prone to loosening due to vibration, flange connections damage the pipe end face, and steel cable binding concentrates stress, easily leading to pipe deformation and anchorage failure, and is difficult to adapt to jacking and pre-embedded pipes of different diameters.

[0003] Expansion bolts, commonly used in building construction, consist of a threaded rod, a nut, and an expansion sleeve. The threaded rod has a frustum-shaped head that tapers towards the head, and the expansion sleeve has an axial slit at its tail end. During use, tightening the nut causes the frustum-shaped head to press into the expansion sleeve, forcing the tail end of the sleeve to expand and deform, thus tightening the mounting hole and achieving a secure fit. However, this structure relies on the plastic deformation of the expansion sleeve for fixation, making disassembly difficult and prone to damaging the wall substrate. Furthermore, once forcibly removed, the sleeve cannot be restored to its original shape, making reuse difficult and resulting in resource waste.

[0004] Based on the above-mentioned technical pain points, this application proposes an expansion tension bolt that integrates uniform force distribution, non-destructive tension function and expansion fastening, non-destructive fixing function, thereby solving the problems of anchoring failure, pipe damage, base damage and resource waste that exist in existing pipe jacking tension anchors, sleeve-type pre-embedded pipe removal devices and expansion bolts. Summary of the Invention

[0005] To address at least one of the problems mentioned in the background art, this application provides an expansion tension bolt component that is suitable for axial tensioning of pipes. It has the advantages of uniform force distribution, stable anchoring, no damage to pipes, adaptability to multi-diameter scenarios, and reusability. It is also suitable for expansion bolt application scenarios, with the advantages of expansion tightening, no damage to the base material, and reusability.

[0006] To achieve the above objectives, this application provides an expansion tension bolt component, including an expansion component body, a nut, a first slider, a second slider, and a connecting pin; The two opposite sides of the expansion component body along the axial direction are set as symmetrical guide surfaces, and both guide surfaces are inclined along the axial direction. A groove is opened on the expansion component body to connect the axial centers of the two guide surfaces. A stud with external threads is provided at one end of the expansion component body corresponding to the two guide surfaces that are close to each other. The nut is used to assemble on the stud. The first and second sliders slide symmetrically on two guide surfaces; the connecting pin passes through the groove with clearance and connects between the first and second sliders, with the head end of the connecting pin movably connected to the first slider and the tail end of the connecting pin fixedly connected to the second slider; the outer peripheral surfaces of the first slider, the expansion body, and the second slider form a set shape matching the application scenario.

[0007] In one feasible implementation, pull holes are provided on the end faces of the first slider and the second slider near the stud.

[0008] In one feasible implementation, a lifting ring is also included, which is provided with a nut sleeve for connecting the stud.

[0009] In one possible implementation, at least one of the outer peripheral surfaces of the first slider and the second slider is provided with a tool groove for mounting a cutting tool.

[0010] In one feasible implementation, a push screw is also included, wherein the head of the push screw is an external threaded section with a torque groove, and the tail of the push screw is a smooth rod section with a diameter smaller than that of the external threaded section. The stud is machined with a push blind hole along the axial direction. The outer end of the push blind hole is a threaded blind hole that mates with the external thread section, and the inner end of the push blind hole is a smooth hole that mates with the smooth rod and communicates with the slide groove.

[0011] In one possible implementation, a connecting pin is installed at one end of the first slider and the second slider near the stud. The connecting pin has a radially penetrating central hole in its middle section, and the smooth section of the push screw has a tapered tip at its tail. The first slider has a positioning mark on the wall of the opening that mates with the connecting pin, and the head of the connecting pin has a positioning notch.

[0012] In one feasible implementation, the end of the expansion member body away from the stud is machined with a threaded seat that extends axially.

[0013] In one feasible implementation, an adjusting screw is also included, wherein the center hole of the connecting screw is machined with an internal thread, and an adjusting hole is formed on the body of the expansion member between the corresponding slide groove and the threaded seat, and the adjusting screw is used to pass through the adjusting hole and connect with the center threaded hole.

[0014] In one feasible implementation, an extended threaded sleeve is also included, which is used for threaded connection and covers the stud.

[0015] In one feasible implementation, the angle between the guide surface and the central axis of the expansion member body is 15°-30°; And / or, the outer peripheral surfaces of the first slider and the second slider are provided with external threads.

[0016] This application provides an expansion tension bolt component, including an expansion component body, a nut, a first slider, a second slider, and a connecting pin.

[0017] When this embodiment of the application is used to pull the pipe opening at the head end of the pipe fitting, the stud end of the expansion member body can be turned outward, so that the first slider and the second slider (which may include part of the stud end if necessary) can be inserted into the inner hole of the pipe fitting. Then, the stud is pulled outward, so that the first slider and the second slider remain relatively stationary under the friction force of the inner hole of the pipe fitting and the connection action of the connecting pin. The cross-section of the outer peripheral surface of the first slider, the second slider and the expansion member body increases until it matches the inner diameter of the pipe opening, thereby achieving the expansion and fixing of the pipe fitting.

[0018] When expansion bolts are used for pipe tensioning, a tension rope can be connected to the stud as the tensioning connection end. During the tensioning process, even if vibration occurs, the first slider, the expansion bolt body, and the second slider remain tightly tucked inside the pipe due to the constant outward pulling force on the expansion bolt body, ensuring stable anchoring. Furthermore, the wedge-shaped fit of the guide surface automatically and precisely adjusts the optimal fulcrum position, maximizing the work done at the fulcrum. This reduces the number of external connectors, lowers the failure rate, and ensures relatively uniform stress on the pipe, making it less prone to deformation. Moreover, the wedge-shaped fit of the guide surface is suitable for a wide range of pipe diameters. When the tensioning function needs to be discontinued, an inward force is applied to the expansion bolt body. The first and second sliders remain relatively stationary due to the friction within the pipe's inner hole. The cross-section of the outer periphery of the structure formed by the first slider, the second slider, and the expansion bolt body decreases, achieving contraction and relaxation of the pipe. Then, the expansion bolt body can be removed as a whole from the support slider. During the process of tightening or loosening the pipe fittings, the expansion bolts do not damage the pipe fittings and do not deform themselves. They can be reused after removal.

[0019] When this embodiment of the application is used for expansion bolts, the stud end of the expansion member body can be facing outwards, so that the first slider, the second slider and part of the stud end can be inserted into the mounting hole. Then, the stud is pulled outwards, so that the first slider and the second slider remain relatively stationary under the friction of the mounting hole and the connection of the connecting pin. The cross-section of the outer peripheral surface of the first slider, the second slider and the expansion member body increases until it matches the inner diameter of the mounting hole, thereby achieving expansion and fixing of the mounting hole. Finally, a washer and a nut are installed on the stud end to lock the member to be fixed.

[0020] When expansion bolt components are applied to expansion bolts, during the fixing process, due to the force exerted on the stud by the component to be fixed, the first slider, the main body of the expansion component, and the second slider remain tightly tucked inside the pipe, ensuring stable anchoring. Furthermore, the wedge-shaped fit of the guide surface automatically and precisely adjusts to the optimal fulcrum position, maximizing the work done at the fulcrum. With fewer external connecting parts, the failure rate is low, resulting in relatively uniform stress on the mounting hole and reducing the likelihood of deformation. The wedge-shaped fit of the guide surface is also suitable for fine-tuning the mounting hole. When it is necessary to remove the expansion bolt, first remove the nut, the component to be fixed, and the washer. Then, apply an inward force to the main body of the expansion component. The first and second sliders remain relatively stationary under the frictional force of the mounting hole. The cross-section of the outer periphery of the structure formed by the first slider, the second slider, and the main body of the expansion component decreases, achieving contraction and relaxation of the mounting hole. Then, the expansion bolt component can be removed as a whole, supporting the slider of the main body of the expansion component. During the tightening or loosening process of the pipe, the expansion bolt component does not damage the mounting hole and does not deform itself, allowing for reuse after removal. Furthermore, this expansion bolt is compatible with hollow bricks and works well.

[0021] This application embodiment is applicable to axial pulling operations on pipe fittings, offering advantages such as uniform force distribution, stable anchoring, no damage to the pipe fitting, adaptability to multi-diameter scenarios, and reusability. It is also suitable for expansion bolt applications, providing advantages such as expansion tightening, no damage to the base material, and reusability. This application embodiment can quickly and easily complete lifting, pulling, and expansion fixing functions, with a simple structure, convenient operation, low cost, and few malfunctions. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a structural schematic diagram of the expansion tension bolt component used for tensioning function provided in the embodiments of this application; Figure 2 for Figure 1 The main view; Figure 3 for Figure 2 AA view; Figure 4 for Figure 2 The right view; Figure 5 Another structural schematic diagram of the expansion tension bolt component provided in the embodiments of this application for tension function; Figure 6A schematic diagram of the expansion tension bolt component used for expansion bolts provided in the embodiments of this application; Figure 7 for Figure 6 The main view; Figure 8 for Figure 7 BB view; Figure 9 An exploded view of the expansion tension bolt component is provided for the embodiments of this application; Figure 10 This is a schematic diagram of the structure of the expansion tension bolt component used for the expansion thread seat provided in the embodiments of this application; Figure 11 for Figure 10 The main view; Figure 12 for Figure 11 The CC view.

[0024] Explanation of reference numerals in the attached figures: 100 - Expansion tension bolt component; 110 - Expansion part body; 111 - Guide surface; 112 - Slide groove; 113 - Stud; 114 - Push blind hole; 115 - Thread seat; 116 - Adjustment hole; 121-First slider; 122-Second slider; 123-Pull hole; 130 - Connecting pin; 131 - Center threaded hole; 140 - Nut; 141 - Flat washer; 142 - Spring washer; 150 - Lifting ring; 160 - Push screw; 161 - External thread section; 162 - Polished shank section; 163 - Tip; 170 - Adjusting screw; 180-Extended threaded sleeve. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. It is worth noting that the embodiments described in the accompanying drawings are only some embodiments of this application, and not all embodiments. That is, the embodiments described with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0026] The following will combine Figures 1-12 An expansion tension bolt component 100 provided in the embodiments of this application will be described.

[0027] This application provides an expansion tension bolt component 100, referring to... Figures 1-9As shown, it includes an expansion body 110, a nut 140, a first slider 121, a second slider 122, and a connecting pin 130.

[0028] The expansion body 110 has two opposite sides along the axial direction configured as symmetrical guide surfaces 111, both of which are inclined along the axial direction. A groove 112 is formed on the expansion body 110 connecting the axial centers of the two guide surfaces 111. A stud 113 with external threads is provided at one end of the expansion body 110 corresponding to the two guide surfaces 111 that are close to each other. A nut 140 is used to assemble onto the stud 113.

[0029] The first slider 121 and the second slider 122 are symmetrically slidably fitted on two guide surfaces 111. A connecting pin 130 passes through the slide groove 112 with a clearance fit and connects between the first slider 121 and the second slider 122. The head end of the connecting pin 130 is clearance fitted with the first slider 121, and the tail end of the connecting pin 130 is threadedly connected to the second slider 122. The outer peripheral surfaces of the first slider 121, the expansion body 110, and the second slider 122 form a shape that matches the application scenario.

[0030] The expansion component body 110 has an axially extending cylindrical structure. One end is machined into a stud 113 for mounting a nut 140, and the other end has two opposite sides machined with guide surfaces 111. The two guide surfaces 111 are symmetrically arranged about the central axis of the expansion component body 110 and form an angle with the central axis. Along the axial direction, the ends of the two guide surfaces 111 that are close to each other are located in the middle of the expansion component body 110, and the ends of the two guide surfaces 111 that are far apart are located in the end of the expansion component body 110 away from the stud 113. The groove 112 extends along the axial direction of the expansion component body 110 and communicates with both guide surfaces 111.

[0031] The connecting screw 130 can be a semi-threaded connecting screw. The head of the connecting screw is flat or round and machined with a cross-shaped or hexagonal torque groove. The shank of the connecting screw is smooth near the head, and has external threads near the tail. The first slider 121 has a countersunk hole, and the head of the connecting screw 130 is used to limit its position at the step of the countersunk hole. The smooth shank of the connecting screw has a clearance fit within the small-diameter section inside the countersunk hole step. The second slider 122 has a threaded hole, and the external thread of the connecting screw is threaded into the threaded hole.

[0032] The shape of the outer periphery of the first slider 121, the expansion body 110, and the second slider 122 may be circular or elliptical, or may be a shape including a set of parallel opposite sides, such as square, hexagonal, and octagonal, to accommodate pipes or mounting holes of corresponding shapes.

[0033] Understandably, the first slider 121 and the second slider 122, under the action of the connecting pin 130, can move axially synchronously with the expansion body 110 along the extension direction of the slide groove 112. When either the slider or the expansion body 110 is pulled, causing relative movement between the slider and the expansion body 110, the cross-section of the outer peripheral surface formed by the guide surface 111 and the slider surface maintains its original shape, but the area increases or decreases accordingly, thereby achieving the expansion and tightening or contraction and relaxation of the pipe or mounting hole.

[0034] When this application embodiment is used for the pipe fitting pulling function, refer to... Figures 1-4 As shown, the main components may include a first slider 121, a second slider 122, and an expansion body 110. When this embodiment is used for pulling the pipe end of a fitting, the stud 113 end of the expansion body 110 can be turned outwards, allowing the first slider 121 and the second slider 122 (which may include part of the stud 113 end if necessary) to extend into the inner hole of the fitting; then the stud 113 is pulled outwards, so that one of the first slider 121 and the second slider 122 remains relatively stationary under the frictional force of the inner hole of the fitting, while the other of the first slider 121 and the second slider 122 also remains relatively stationary due to the connection of the connecting pin 130 (if necessary, the large end face of the first slider 121 and the second slider 122 can be pressed against each other to help limit the movement of the slider); the relative movement of the stud 113 and the slider increases the cross-section of the outer peripheral surface of the structure formed by the first slider 121, the second slider 122, and the expansion body 110 until it matches the inner diameter of the pipe opening, thereby achieving the expansion and fixing of the fitting.

[0035] When the expansion tension bolt 100 is used for pipe tensioning, a tension rope can be connected to the stud 113 as the tensioning connection end. During the tensioning process, even if vibration occurs, the expansion body 110 is always subjected to a pulling force towards the outside of the pipe, so the first slider 121, the expansion body 110, and the second slider 122 can always remain taut inside the pipe, ensuring stable anchoring. Furthermore, the wedge-shaped fit of the guide surface 111 automatically and precisely adjusts the optimal fulcrum position, maximizes the work done at the fulcrum, has fewer external connecting parts, and a low failure rate, making the pipe subjected to relatively uniform stress and less prone to pipe deformation. Moreover, the wedge-shaped fit of the guide surface 111 is applicable to a wide range of pipe diameters. When the pulling function needs to be removed, an inward force is applied to the expansion member body 110. The first slider 121 and the second slider 122 remain relatively stationary under the frictional force of the inner hole of the pipe. The expansion member body 110 and the sliders move relative to each other, reducing the cross-section of the outer periphery of the structure formed by the first slider 121, the second slider 122, and the expansion member body 110, thus achieving the contraction and relaxation of the pipe. Then, the expansion pulling bolt 100 can be removed as a whole by supporting the slider with the expansion member body 110. During the process of tightening or loosening the pipe, the expansion pulling bolt 100 does not damage the pipe and does not deform itself, allowing for reuse after removal.

[0036] When this embodiment of the application is used for pulling pipe segments (such as when both pipe ends are cracked) or straight pipe segments at any position, traction ropes can be connected to both ends of the expansion body 110 (e.g., on the stud 113 or at the groove 112), so that the expansion traction bolt 100 is located inside the pipe, and the traction ropes at both ends extend outside the pipe openings at both ends of the pipe. First, pull the traction rope at the stud 113 end of the expansion body 110 to tighten the expansion traction bolt 100 and fix it inside the pipe. Continue to pull the traction rope at the same end to drag the pipe until it moves to the designated position. Then, pull the traction rope at the end of the expansion body 110 away from the stud 113 to tighten the expansion traction bolt 100 and detach it from the pipe. Continue to pull the traction rope at the same end to drag the expansion traction bolt 100 out of the pipe. During the pulling process, it also has the advantages of relatively uniform force distribution, stable anchoring, no damage to the pipe, and a relatively large applicable pipe diameter range. Moreover, during the process of tightening or loosening the pipe fitting, the expansion bolt 100 does not damage the pipe fitting and does not deform itself, and can be reused after removal.

[0037] When this application embodiment is used for bolt tightening function, refer to... Figures 6-8As shown, the main components may include a first slider 121, a second slider 122, an expansion member body 110, and a nut 140. When this embodiment is used for expansion bolts, the stud 113 end of the expansion member body 110 can be facing outwards, allowing the first slider 121, the second slider 122, and part of the stud 113 end to extend into the mounting hole. Then, the stud 113 is pulled outwards, causing the first slider 121 and the second slider 122 to remain relatively stationary under the friction of the mounting hole and the connection of the connecting pin 130. The expansion member body 110 and the slider move relative to each other, increasing the cross-section of the outer peripheral surface of the first slider 121, the second slider 122, and the expansion member body 110 until it matches the inner diameter of the mounting hole, thus achieving expansion and fixing of the mounting hole. Finally, a flat washer 141 is installed at the end face of the mounting hole at the stud 113 end, followed by a spring washer 142 and a nut 140, etc., to lock the component to be fixed.

[0038] When the expansion bolt component 100 is applied to the expansion bolt, during the fixing process, due to the force exerted on the stud 113 by the component to be fixed, the first slider 121, the expansion body 110, and the second slider 122 remain tightly tucked inside the pipe, ensuring stable anchoring. Furthermore, the wedge-shaped fit of the guide surface 111 automatically and precisely adjusts the optimal fulcrum position, maximizing the work done at the fulcrum. With fewer external connecting parts, the failure rate is low, resulting in relatively uniform stress on the mounting hole and reducing the likelihood of deformation. Additionally, the wedge-shaped fit of the guide surface 111 is suitable for fine-tuning and matching the mounting hole. When it is necessary to remove the expansion bolt, first remove the nut 140, the component to be fixed, the spring washer 142, and the flat washer 141, etc. Then, apply an inward force to the expansion body 110. The first slider 121 and the second slider 122 remain relatively stationary under the frictional force of the mounting hole, while the expansion body 110 and the sliders move relative to each other. The cross-section of the outer periphery formed by the first slider 121, the second slider 122, and the expansion body 110 decreases, achieving contraction and relaxation of the mounting hole. Then, the expansion bolt 100 can be removed by supporting the slider of the expansion component body 110. During the tightening or loosening process of the pipe fitting, the expansion bolt 100 does not damage the mounting hole, nor does it deform, and can be reused after removal. Furthermore, this expansion bolt function is compatible with hollow bricks and works well.

[0039] This application embodiment is applicable to axial pulling operations on pipe fittings, offering advantages such as uniform force distribution, stable anchoring, no damage to the pipe fitting, adaptability to multi-diameter scenarios, and reusability. It is also suitable for expansion bolt applications, providing advantages such as expansion tightening, no damage to the base material, and reusability. This application embodiment can quickly and easily complete lifting, pulling, and expansion fixing functions, with a simple structure, convenient operation, low cost, and few malfunctions.

[0040] In one feasible implementation, refer to Figure 3 and Figure 4 As shown, threaded pull holes 123 are provided on the end faces of the first slider 121 and the second slider 122 near the end of the stud 113.

[0041] It is understandable that the connection end between the expansion member body 110 and the stud 113 is the small end of the section where the guide surface 111 is located. Correspondingly, the end faces of the first slider 121 and the second slider 122 near the stud 113 are the large ends of the sliders. A threaded pull hole 123 is provided on the large end face of the slider near the outer edge, which can be used to connect a long screw or fix a pull rope with a screw. When the expansion pull bolt 100 is used for pipe pulling, the slider is moved by pulling the long screw or pull rope, thereby achieving tightening and loosening inside the pipe, which is convenient to operate.

[0042] In some embodiments, the threaded pull hole 123 can communicate with the opening of the connecting pin 130, thereby pressing the connecting pin 130 with the screw in the threaded pull hole 123 to assist in positioning the latter.

[0043] In one feasible implementation, refer to Figure 5 and Figure 9 As shown, the expansion tension bolt component 100 also includes a lifting ring 150, which is provided with a nut sleeve for connecting the stud 113.

[0044] Thus, one end of the lifting ring 150 is a ring, and the other end is a nut sleeve. The lifting ring 150 is threaded onto the stud 113 via the nut sleeve, which makes it easier to pull the expansion component body 110. For large pipe fittings, a pulling device can also be connected to the lifting ring 150 to facilitate applying pulling force to the expansion component body 110.

[0045] It is understandable that, such as Figure 5 and Figure 9 As shown, the size of the lifting ring 150 is larger than that of the expansion bolt 100, making it more suitable for pulling at the pipe opening. When it is desired to use the lifting ring 150 inside the pipe, the size of the lifting ring 150 needs to be reduced so that it can be pulled and moved smoothly inside the pipe.

[0046] In one feasible implementation, the outer peripheral surfaces of the first slider 121 and the second slider 122 are both provided with tool slots for mounting cutting tools.

[0047] In this design, a blade is used as the cutting tool, and a tool slot serves as the recess for mounting the tool. For small plastic pipe fittings, existing technologies such as locating pins and clamping screws can be used to fix the blade in the tool slot. For large plastic pipe fittings, existing technologies such as clamping plates, bolts, or set screws can be used to fix the tool in the tool slot.

[0048] In this way, for some plastic pipes that need to be cut due to breakage, the pipes can be cut axially by attaching a blade to the slider and pulling the expansion body 110 while both ends are visible.

[0049] In one feasible implementation, refer to Figure 8 and Figure 9 As shown, the expansion tension bolt 100 also includes a push screw 160. The head of the push screw 160 is an external thread section 161 with a torque groove, and the tail of the push screw 160 is a smooth rod section 162 with a diameter smaller than that of the external thread section 161.

[0050] A push blind hole 114 is machined axially inside the stud 113. The outer end of the push blind hole 114 is a threaded blind hole that mates with the external thread section 161, and the inner end of the push blind hole 114 is a smooth hole that mates with the smooth rod and communicates with the slide groove 112.

[0051] The expansion tension bolt component 100 with push screw 160 can be used in applications requiring expansion bolts. The push blind hole 114 is coaxially aligned with the axis of the expansion component body 110. The head of the push screw 160 can have a slotted or Phillips head for easy tightening and is threaded into the internal thread at the outer end of the push blind hole 114. The tail of the push screw 160 is a smooth rod, which passes through the internal thread of the push blind hole 114 and extends into the inner smooth hole, thereby pressing against the connecting pin 130. This restricts the rotation of the connecting pin 130 while keeping the two sliders relatively pressed against the mounting hole, enhancing the overall stability of the expansion.

[0052] In addition, the depth of the internal thread of the push blind hole 114 can be appropriately increased, which can be used to connect the screw rod and extend the threaded section of the expansion bolt, thus providing more flexible application scenarios.

[0053] In one feasible implementation, refer to Figure 8 As shown, a connecting pin 130 is installed at one end of the first slider 121 and the second slider 122 near the stud 113.

[0054] The connecting pin 130 has a radially penetrating central hole in the middle, and the smooth section 162 of the push screw 160 has a tapered tip 163 machined at the tail.

[0055] The first slider 121 has a positioning mark on the wall of the hole that mates with the connecting pin 130, and the head of the connecting pin 130 has a positioning notch.

[0056] When the connecting pin 130 is located at the small end of the section where the guide surface 111 is located, the first slider 121 and the second slider 122 can have a relatively long space for movement and adjustment on the guide surface 111, preventing the threaded fixing relationship between the connecting pin 130 and the second slider 122 from overly restricting the movement space of the two sliders.

[0057] The positioning mark on the first slider 121 is aligned with the positioning notch of the connecting pin 130, so that the axis of the central hole through the middle of the connecting pin 130 is parallel to the central axis of the expansion body 110. This allows the tip 163 of the push screw 160 to engage in the central hole of the connecting pin 130, strengthening the connection between the push screw 160 and the connecting pin 130, enhancing the stability of the first slider 121 and the second slider 122, and improving the overall expansion stability.

[0058] It is understandable that when the expansion tension bolt component 100 is used for expansion bolts, it has different models corresponding to mounting holes of different diameters. That is, standard parts corresponding to the hole diameter can be prepared. Consequently, the adjustment space for the first slider 121 and the second slider 122 to move along the guide surface 111 is relatively limited. The axis of the central hole of the connecting nail 130 can be relatively kept on the axis of the push blind hole 114. Combined with the tip 163 of the push screw 160, even if a slight movement occurs, the tip 163 can at least partially extend into the central hole, thereby strengthening the expansion bolt's tightening and fixing.

[0059] In one feasible implementation, refer to Figures 10-12 As shown, the end of the expansion body 110 away from the stud 113 is machined with a threaded seat 115 that extends axially.

[0060] When the expansion tension bolt assembly is used for pipe tensioning, the threaded seat 115 can be connected to a long screw or the tension rope can be fixed by the screw, which facilitates reverse tensioning of the expansion assembly body 110 and achieves tightening and loosening functions.

[0061] In one feasible implementation, refer to Figure 12 As shown, the expansion tension bolt 100 also includes an adjusting screw 170. The center hole of the connecting nail 130 is machined with an internal thread, and the diameter of the center hole is smaller than the diameter of the thread seat 115. An adjusting hole 116 is opened on the expansion body 110 between the corresponding slide groove 112 and the thread seat 115. The adjusting screw 170 is used to pass through the adjusting hole 116 and be threadedly connected to the center hole.

[0062] The adjusting hole 116 and the threaded seat 115 are both coaxially arranged with the expansion body 110, and the diameter of the adjusting hole 116 is smaller than the diameter of the threaded seat 115. The adjusting hole 116 can be a smooth hole that is clearance-fitted with the adjusting screw 170. The head of the adjusting screw 170 is larger than the diameter of the adjusting hole 116. The shank of the adjusting screw 170 is machined with external threads, and the tail of the adjusting screw 170 has a guide tip.

[0063] The expansion tension bolt 100, equipped with a threaded seat 115 and an adjusting screw 170, can be used in applications requiring an expansion threaded seat. With the threaded seat 115 of the expansion body 110 positioned at the outer end of the mounting hole, the stud 113 end, the first slider 121, and the second slider 122 are inserted into the mounting hole. The first slider 121 and the second slider 122 remain relatively stationary due to the frictional force of the hole wall and the connecting action of the connecting pin 130. As the stud 113 end is continuously pushed into the mounting hole, the cross-section of the outer circumferential surface formed by the first slider 121, the second slider 122, and the expansion body 110 increases until it matches the inner diameter of the mounting hole. Furthermore, the adjusting screw 170 passes through the adjusting hole 116 and extends into the center hole using the guide tip. The external thread of the adjusting screw 170 is threadedly connected to the center hole. By turning the adjusting screw 170, the first slider 121 and the second slider 122 move outward along the guide surface 111, enhancing the tightening and fixing of the mounting hole. Then, the screw can be threaded onto the threaded seat 115 to install the part to be fixed.

[0064] When it is necessary to remove the expansion tension bolt 100 used for the expansion threaded seat, first remove the connecting screws inside the part to be fixed and the threaded seat 115. Then, turn the adjusting screw 170 in the opposite direction to move the first slider 121 and the second slider 122 inward along the guide surface 111. The cross-section of the first slider 121, the second slider 122 and the outer peripheral surface of the expansion body 110 becomes smaller, realizing the contraction and relaxation of the mounting hole until the adjusting screw 170 is removed. Further, move the expansion body 110 outward to further contract and relax within the mounting hole, so that the expansion body 110 can be removed as a whole from the expansion tension bolt 100.

[0065] In the process of using the expansion tension bolt 100 as an expansion thread seat, it also has the advantages of relatively stable anchoring, automatic adjustment of the fulcrum, relatively uniform force distribution, not easily damaging the mounting hole, and reusability.

[0066] In one feasible implementation, refer to Figures 10-12 As shown, the expansion tension bolt 100 also includes an extended threaded sleeve 180, which is used for threaded connection and covers the stud 113.

[0067] Thus, when the expansion tension bolt 100 is used with the expansion thread seat, the extended threaded sleeve 180 can be connected to the stud 113, protecting the stud 113 from dust and damage. It is understood that when a washer is installed inside the stud 113, the washer can be set to the same diameter as the extended threaded sleeve 180, and both should be smaller than the diameter of the mounting hole to avoid obstructing the insertion of the extended threaded sleeve 180 into the mounting hole.

[0068] In some embodiments, such as Figure 10 As shown, the extended threaded sleeve 180 has two sets of parallel opposite sides, which facilitates clamping and tightening of the extended threaded sleeve 180. In some other embodiments, the extended threaded sleeve 180 may also be an extended hexagonal nut structure.

[0069] In some embodiments, the internal thread of the extended threaded insert 180 can be a partial thread, which facilitates reducing the path of thread engagement with the stud 113 in expansion bolt seats and shortening assembly time. In other embodiments, the extended threaded insert 180 can be a full thread, which facilitates its use in expansion bolts, where the extended threaded insert 180 is threaded onto a portion of the stud 113, and the extended threaded insert 180 extending beyond the stud 113 can be used as a thread seat.

[0070] In one feasible implementation, the angle between the guide surface 111 and the central axis of the expansion body 110 is 15°-30°.

[0071] This configuration ensures that the first slider 121 and the second slider 122 have a relatively suitable displacement distance, meeting the requirements of the application scenario.

[0072] In one feasible implementation, the outer peripheral surfaces of the first slider 121 and the second slider 122 are provided with external threads.

[0073] This not only increases friction and provides an anti-slip effect, but also makes it suitable for threaded pipes or threaded mounting holes.

[0074] This application embodiment realizes the standard part design that integrates the three functions of pipe fitting tensioning, expansion bolts and expansion thread seats into one unit. It has the advantages of relatively uniform stress distribution, no damage to the base material, reusability, simple structure, low cost and few failures.

[0075] It should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" in the description of this application should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0076] The terms “upper,” “lower,” “front,” “back,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0077] The term "multiple" means two or more, unless otherwise specified precisely.

[0078] The terms “first,” “second,” “third,” “fourth,” etc., (if applicable) are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can include implementations in sequences other than those illustrated or described herein.

[0079] The terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or apparatus.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An expansion tension bolt component, characterized in that, It includes the expansion component body, nut, first slider, second slider, and connecting pin; The two opposite sides of the expansion component body along the axial direction are set as symmetrical guide surfaces, and both guide surfaces are inclined along the axial direction. A groove is opened on the expansion component body to connect the axial centers of the two guide surfaces. A stud with external threads is provided at one end of the expansion component body corresponding to the two guide surfaces that are close to each other. The nut is used to assemble on the stud. The first and second sliders slide symmetrically on two guide surfaces; the connecting pin passes through the groove with clearance and connects between the first and second sliders, with the head end of the connecting pin movably connected to the first slider and the tail end of the connecting pin fixedly connected to the second slider; the outer peripheral surfaces of the first slider, the expansion body, and the second slider form a set shape matching the application scenario.

2. The expansion tension bolt according to claim 1, characterized in that, Pull holes are provided on the end faces of the first and second sliders near the stud.

3. An expansion tension bolt according to claim 2, characterized in that, It also includes a lifting ring, which is equipped with a nut sleeve for connecting the stud.

4. An expansion tension bolt according to claim 3, characterized in that, At least one of the outer peripheral surfaces of the first slider and the second slider is provided with a tool groove for mounting a cutting tool.

5. An expansion tension bolt according to any one of claims 1-3, characterized in that, It also includes a push screw, wherein the head of the push screw is an external thread section with a torque groove, and the tail of the push screw is a smooth rod section with a diameter smaller than that of the external thread section; The stud is machined with a push blind hole along the axial direction. The outer end of the push blind hole is a threaded blind hole that mates with the external thread section, and the inner end of the push blind hole is a smooth hole that mates with the smooth rod and communicates with the slide groove.

6. An expansion tension bolt according to claim 5, characterized in that, A connecting pin is installed at the end of the first and second sliders near the stud. The connecting pin has a radially penetrating central hole in its middle section, and the smooth section of the push screw has a tapered tip at its tail. The first slider has a positioning mark on the wall of the opening that mates with the connecting pin, and the head of the connecting pin has a positioning notch.

7. An expansion tension bolt according to any one of claims 1-3, characterized in that, The expansion component body has a threaded seat that extends axially at the end away from the stud.

8. The deep membrane oxygen integrated reactor according to claim 7, characterized in that, It also includes an adjusting screw, the center hole of the connecting screw is machined with an internal thread, and an adjusting hole is opened on the body of the expansion member between the corresponding slide groove and the threaded seat. The adjusting screw is used to pass through the adjusting hole and connect with the center threaded hole.

9. An expansion tension bolt according to claim 8, characterized in that, It also includes extended threaded sleeves, which are used for threaded connections and cover the studs.

10. An expansion tension bolt according to any one of claims 1-3, characterized in that, The angle between the guide surface and the central axis of the expansion component body is 15°-30°; And / or, the outer peripheral surfaces of the first slider and the second slider are provided with external threads.

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