A quick-fixing tooling for grouting sleeves and its usage method

Abstract

The present invention relates to a rapid fixing tooling for a grouting sleeve and a using method thereof, which comprises a split expansion core tube, an expansion core nut, a pull rod and a return spring; one end of the split expansion core tube is of a split structure; the expansion core nut is arranged inside this end and abuts against the inner wall of the split expansion core tube; one end of the pull rod is connected to the expansion core nut, and the other end passes through the other end of the split expansion core tube; the return spring is sleeved on the pull rod. When the end of the pull rod passing through the split expansion core tube is pulled, the expansion core nut moves into the split expansion core tube, and the outer diameter of the tube end becomes larger, compressing the return spring; when the expansion core nut resets under the action of the return spring, the outer diameter of the tube end retracts. For the rapid fixing tooling of the present invention, only by pulling the pull rod to drive the expansion core nut to penetrate deep into the split expansion core tube, the end of the split expansion core tube can be expanded, so as to realize the rapid fixing of the grouting sleeve; it replaces the way of screwing multiple threaded parts of the existing fixing tooling, with convenient operation and easy to master.

Description

Technical Field

[0001] The present invention relates to the field of prefabricated buildings, and specifically, to a rapid fixing tooling for a grouting sleeve and a using method thereof. Background Art

[0002] With the continuous development and progress of China's prefabricated building technology, and the strong promotion of the prefabricated building production mode by the state, prefabricated building projects have been comprehensively promoted, with a huge market scale, and corresponding tools also have a large application demand.

[0003] Currently, the fixing tooling used in the production of PC component factories is mostly in the form of nut locking and expanding the plug of the expansion tooling. During the fastening process, a tool for turning the nut needs to be used to rotate the nut for multiple turns to lock it, which is time-consuming and laborious; moreover, the tooling plug is prone to wear and damage during use, and has a short service life.

[0004] Some also adopt the method of tapping the thread at the tail of the grouting sleeve. Similarly, a tool needs to be used to rotate the screw or other threaded parts for multiple turns to complete the installation and disassembly of the grouting sleeve. This method will also additionally increase the production process, consume more energy and man-hours, and increase the product cost in vain, which is neither environmentally friendly nor economical.

[0005] The above problems are worthy of solution. Summary of the Invention

[0006] In order to overcome the deficiencies of the existing technology, the present invention provides a rapid fixing tooling for a grouting sleeve and a using method thereof.

[0007] The technical solution of the present invention is as follows:

[0008] A rapid fixing tooling for a grouting sleeve includes a split expansion core tube, an expansion core nut, a pull rod and a return spring. The split expansion core tube is arranged inside the grouting sleeve and contacts the sleeve rib on the inner wall of the grouting sleeve; the split expansion core tube is a hollow cylindrical structure, and a plurality of slits extending from the end to the middle are evenly arranged at one end, so that this end has a split structure; the expansion core nut is arranged inside this end and abuts against the inner side wall of the split expansion core tube; one end of the pull rod is connected to the expansion core nut, and the other end passes through the other end of the split expansion core tube; the return spring is sleeved on the pull rod, and one end abuts against the expansion core nut, and the other end abuts against the inner wall of the end of the split expansion core tube; when the end of the pull rod passing through the split expansion core tube is pulled, the expansion core nut moves into the split expansion core tube, so that the outer diameter of the end of the split expansion core tube becomes larger, and the return spring is compressed; when the return spring resets, it pushes the expansion core nut outwards, so that the outer diameter of the end of the split expansion core tube retracts.

[0009] The present invention according to the above solution is characterized in that one end of the pull rod passing through the split expansion core tube is connected to a pulling assembly. The pulling assembly includes a wrench, which is a cam wrench. A wrench core shaft is provided at the head end of the cam wrench, and one end of the pull rod passing through the split expansion core tube is connected to the wrench core shaft. When the cam wrench is turned from the release position to the self-locking position, the end of the pull rod is pulled. When the cam wrench is turned from the self-locking position to the release position, the return spring is reset and pushes the expansion core nut, and the outer diameter of the end of the split expansion core tube shrinks.

[0010] Further, the convex arc surface at the head end of the cam wrench abuts against the end face of the split expansion core tube. The head end of the cam wrench is movably connected to the wrench core shaft and rotates about the wrench core shaft. The pull rod vertically penetrates into the wrench core shaft and is fixedly connected by a screw.

[0011] Furthermore, a gasket is provided between the cam wrench and the end face of the split expansion core tube.

[0012] Furthermore, an arc-shaped groove is provided on the surface of the gasket, and the head end of the cam wrench is located in the arc-shaped groove.

[0013] Further, the distance from the top surface to the center of the head end of the cam wrench is not equal to the distance from the front side surface to the center.

[0014] Preferably, the distance from the top surface to the center of the head end of the cam wrench is less than the distance from the front side surface to the center.

[0015] Further, two perforated brackets are provided at the head end of the cam wrench. The wrench core shaft passes through the two perforated brackets. The wrench core shaft is provided with a through hole and a threaded hole that are perpendicular and communicate with each other. The pull rod is inserted into the through hole, and the screw is inserted into the threaded hole and abuts against the pull rod.

[0016] The present invention according to the above solution is characterized in that an annular tooth-shaped protrusion is provided on the circumferential side surface of one end of the split expansion core tube close to the expansion core nut.

[0017] The present invention according to the above solution is characterized in that a grout stop ring is provided on the outer periphery of the split expansion core tube, and the grout stop ring is located at the opening of the grouting sleeve.

[0018] The present invention according to the above solution is characterized in that a limit chassis is provided at one end of the split expansion core tube close to the pulling assembly, and the diameter of the limit chassis is larger than the diameter of the tube body of the split expansion core tube.

[0019] Further, a prying notch is provided on the surface edge of the limit chassis.

[0020] The present invention according to the above solution is characterized in that the upper end of the expansion core nut is frustum-shaped, and the inner diameter of the end of the split expansion core tube gradually decreases to form a flared opening adapted to the frustum-shaped upper end of the expansion core nut.

[0021] The present invention according to the above solution is characterized in that the inner part of the expansion core nut is provided with an internal thread, and the pull rod is an external threaded rod.

[0022] The present invention also provides a method for using a quick-fixing tooling according to the above solution, including the following steps:

[0023] S1. Insert one end of the split expansion core tube of the quick-fixing tooling into the positioning hole on the side formwork from the outside of the side formwork, and press the limit chassis flat against the outer side of the side formwork;

[0024] S2. Align the tail hole of the grouting sleeve with the split expansion core tube, and sleeved on the split expansion core tube until the tail end face of the grouting sleeve is flat against the inner side of the side formwork;

[0025] S3. Press down the wrench to the self-locking position, so that the pull rod drives the expansion core nut to move into the split expansion core tube, thereby expanding the split expansion core tube and clamping the grouting sleeve, and at the same time the return spring is compressed;

[0026] S4. When disassembling, pull up the wrench to the release position, the expansion core nut moves towards the end of the split expansion core tube under the elastic force of the return spring, and the outer diameter of the end of the split expansion core tube retracts, and the quick-fixing tooling can be withdrawn from the positioning hole on the side formwork.

[0027] The present invention according to the above solution has the beneficial effects that:

[0028] The present invention forms a quick-fixing tooling through the combination of the split expansion core tube, the pull rod, the expansion core nut and the return spring. Only by pressing down the cam wrench to pull the pull rod and driving the expansion core nut to penetrate into the split expansion core tube can the end of the split expansion core tube be expanded, so as to realize the quick fixation of the grouting sleeve; to remove the fixing tooling, only need to pull up the cam wrench, the return spring resets and pushes the expansion core nut, and the end of the split expansion core tube retracts, then the fixing tooling can be taken out;

[0029] The present invention replaces the existing method of screwing multiple threaded parts of the fixing tooling, which is convenient, labor-saving, tool-free and easy to operate; at the same time, it saves the additional cost caused by tapping the tail of the grouting sleeve;

[0030] Furthermore, during the use of the present invention, the side formwork does not need to be disassembled, saving the process of repeatedly disassembling and assembling the side formwork and a large amount of working hours. Brief Description of the Drawings

[0031] Figure 1 is a schematic structural diagram of the present invention;

[0032] Figure 2 Structural decomposition diagram of the present invention;

[0033] Figure 3 Decomposition diagram of the split expansion core tube in the present invention;

[0034] Figure 4 and Figure 5 Schematic diagram of the process of rotating the cam wrench;

[0035] Figure 6 Schematic diagram of fixing the grouting sleeve of the present invention.

[0036] In the figure, 1 is the split expansion core tube; 11 is the slit; 12 is the annular tooth-shaped protrusion; 13 is the limit chassis; 131 is the pry notch; 14 is the grout stop ring;

[0037] 2 is the pull rod; 21 is the return spring; 3 is the expansion core nut; 4 is the cam wrench; 41 is the perforated bracket; 5 is the wrench core shaft; 51 is the through hole; 52 is the screw hole; 6 is the screw; 7 is the gasket; 71 is the arc-shaped groove; 8 is the grouting sleeve; 9 is the side formwork. Specific implementation mode

[0038] In order to better understand the purpose, technical solution and technical effect of the present invention, the present invention will be further explained below in conjunction with the drawings and embodiments. At the same time, it is stated that the embodiments described below are only used to explain the present invention and are not used to limit the present invention.

[0039] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time.

[0040] The directions or positions indicated by the terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the directions or positions shown in the drawings, and are only for the convenience of description and cannot be construed as a limitation to the technical solution of the present invention. The meaning of "several" is two or more, unless otherwise specifically defined.

[0041] Such as Figure 1 and Figure 6As shown, a quick fixing tool for a grouting sleeve comprises a split-type expansion tube 1, an expansion nut 3, a pull rod 2 and a reset spring 21. The split-type expansion tube 1 is arranged inside the grouting sleeve 8 and contacts the sleeve ribs on the inner wall of the grouting sleeve 8; the split-type expansion tube 1 is a hollow cylindrical structure, one end of which is evenly provided with a plurality of slits 11 extending from the end to the middle, so that the end is a split-type structure with multiple petals; the expansion nut 3 is arranged inside the end, and the side surface of the expansion nut 3 abuts against the inner side wall of the split-type expansion tube 1; the reset spring 21 is sleeved on the pull rod 2, and one end abuts against the expansion nut 3, and the other end abuts against the inner wall of the end of the split-type expansion tube;

[0042] When the expanding core nut 3 moves into the tube, the multiple petals can be moved away from each other along the radial direction of the tube, thereby expanding the end of the petal structure and increasing the force between the outer wall of the petal expanding core tube 1 and the sleeve ribs; when the expanding core nut 3 moves toward the end of the tube, the petals at the end of the petal expanding core tube are closed, the end retracts, and there is no force between the outer wall of the petal expanding core tube and the sleeve ribs, so the petal expanding core tube can be easily taken out of the grouting sleeve.

[0043] In the present invention, one end of the pull rod 2 is connected to the expanding core nut 3, and the other end passes through the other end of the split-type expanding core tube 1; when the end of the pull rod 2 passing through the split-type expanding core tube 1 is pulled, the expanding core nut 3 moves into the split-type expanding core tube 1 and increases the outer diameter of the end of the split-type expanding core tube 1, thereby achieving the effect of expanding the end of the split-type expanding core tube.

[0044] In the present invention, one end of the pull rod 2 passing through the split core expansion tube 1 is connected to the pulling component, and the pulling component is used to pull the pull rod 2. The use of the pulling component is convenient for operating the pull rod 2 and is more labor-saving, avoiding the failure of manual pulling force to pull the core expansion nut 3 well.

[0045] The pulling assembly includes a wrench, a wrench mandrel 5 and a screw 6. The head end of the wrench is movably connected to the wrench mandrel 5 and rotates with the wrench mandrel 5 as the axis. The pull rod 2 vertically penetrates the wrench mandrel 5 and is fixedly connected to the wrench mandrel 5 by the screw 6. The wrench is a cam wrench 4, and the convex arc surface of the head end of the cam wrench 4 abuts against the end face of the split-type core expansion tube 1. It is known to those skilled in the art that the head end of the cam wrench 4 is a cam, and the diameters of different positions on the convex arc surface of the cam are different; when the cam wrench 4 is rotated around the wrench mandrel 5, and rotated to the more convex side (i.e., the side with a larger diameter) on the convex arc surface abuts against the end face of the split-type core expansion tube 1, the center of the head end of the cam wrench 4 will be away from and pull the pull rod 2 and the core expansion nut 3. At this time, the cam wrench is in a self-locking position, and the core expansion nut 3 is moved into the split-type core expansion tube 1.

[0046] Conversely, when the cam wrench 4 is pulled, rotated until the smaller-diameter side of the outer convex arc surface contacts the end face of the split expansion core tube, the center of the head end of the cam wrench 4 (the wrench mandrel 5) approaches and releases the tension on the pull rod. At this time, the cam wrench is in the release position, and then under the action of the restoring force of the return spring 21, the expansion core nut 3 is pushed outward.

[0047] Through the combination of the split expansion core tube, the pull rod, the expansion core nut, and the return spring, the present invention forms a quick-fixing tooling. Only by pressing down the cam wrench to pull the pull rod and driving the expansion core nut to penetrate into the split expansion core tube can the end of the split expansion core tube be expanded, thereby realizing the quick fixation of the grouting sleeve. To remove the fixing tooling, only the cam wrench needs to be lifted, and the return spring resets to drive the expansion core nut to move outward, and the end of the split expansion core tube retracts, then the fixing tooling can be taken out.

[0048] As Figure 3 shown, in a preferred embodiment, a gasket 7 is provided between the cam wrench 4 and the end face of the split expansion core tube 1. Further, an arc-shaped groove 71 is provided on the surface of the gasket 7, and the head end of the cam wrench 4 is located in the arc-shaped groove 71. The setting of the gasket 7 is beneficial to the stable rotation of the wrench, and the arc-shaped groove 71 and the cam structure are firmly locked.

[0049] As Figure 4 and Figure 5 shown, the distance from the top surface to the center of the head end of the cam wrench 4 is not equal to the distance from the front side to the center. In this embodiment, the distance from the top surface to the center of the head end of the cam wrench 4 is less than the distance from the front side to the center, so that the pull rod 2 can be pulled after the wrench is rotated 90°. Specifically, when the wrench is in the horizontal state, the top surface of its head end contacts the gasket 7. After the wrench is rotated 90°, the wrench is in the vertical state, and the front side of its head end contacts the gasket 7. The distance from the center of the head end of the cam wrench 4 to the contact point becomes larger, and finally, the cam wrench 4 is pressed down and the pull rod 2 is pulled.

[0050] In other embodiments, it can also be set that the distance from the top surface to the center of the head end of the cam wrench 4 is greater than the distance from the front side to the center, so as to realize lifting the cam wrench 4 and pulling the pull rod 2.

[0051] In a preferred embodiment, the difference in the distances from different positions on the top surface of the head end of the cam wrench 4 to its center gradually changes, so that during the rotation of the wrench, the displacement change amounts of the pull rod 2 and the expansion core nut 3 are linear, and the operation of rotating the wrench is smoother.

[0052] As Figure 2As shown, in an alternative embodiment, two perforated brackets 41 are provided at the head end of the cam wrench 4. The wrench mandrel 5 passes through the two perforated brackets 41 and can rotate internally. The wrench mandrel 5 is provided with a vertically communicating through hole 51 and a threaded hole 52. The pull rod 2 is inserted into the through hole 51, and the screw 6 is inserted into the threaded hole 52 and abuts against the pull rod 2 to achieve the fixed connection between the pull rod 2 and the wrench mandrel 5.

[0053] In the present invention, an annular tooth-shaped protrusion 12 is provided on the circumferential side of one end of the split expansion core tube 1 close to the expansion core nut 3, which can increase the friction force with the sleeve ribs on the inner wall of the grouting sleeve 8, so that the grouting sleeve 8 is fixed more firmly and the positioning effect is better.

[0054] As Figure 3 shown, in the present invention, a slurry stopping ring 14 is provided on the outer periphery of the split expansion core tube 1, and the slurry stopping ring 14 is located at the opening of the grouting sleeve 8. When the split expansion core tube 1 is connected to the grouting sleeve 8, the slurry stopping ring 14 blocks the gap at the opening of the grouting sleeve 8, which can effectively prevent concrete from entering the inside of the grouting sleeve 8 and blocking the inner hole.

[0055] In the present invention, a limiting chassis 13 is provided at one end of the split expansion core tube 1 close to the pulling assembly, and the diameter of the limiting chassis 13 is larger than the diameter of the tube body of the split expansion core tube 1. During use, after the tube body of the split expansion core tube 1 passes through the positioning hole of the side formwork 9, the limiting chassis 13 can be stuck outside the side formwork 9 and cannot pass through the positioning hole.

[0056] A prying notch 131 is provided on the surface edge of the limiting chassis 13, and the prying notch 131 is used to assist in pulling out the split expansion core tube 1. For example, a prying tool is inserted into the prying notch 131, and the limiting chassis 13 and the side formwork 9 are pried and separated forcefully to take out the split expansion core tube 1.

[0057] In the present invention, the upper end of the expansion core nut 3 is frustum-shaped, and the inner diameter of the end of the split expansion core tube 1 gradually becomes smaller to form a flared mouth adapted to the frustum-shaped upper end of the expansion core nut 3, and the diameter near the end edge is larger to facilitate the movement of the expansion core nut 3 into the split expansion core tube 1.

[0058] In an alternative embodiment, an internal thread is provided inside the expansion core nut 3, and the pull rod 2 is an external threaded rod. The expansion core nut 3 and the pull rod 2 can be connected together by threaded connection, and the operation is convenient and simple.

[0059] As Figure 6 shown, the present invention also provides a method for using a quick fixing tooling, including the following steps:

[0060] S1. Insert the split expansion core tube 1 of the quick fixing tooling into the positioning hole on the side formwork 9 from the outside of the side formwork 9, and make the limiting chassis 13 flat against the outer side surface of the side formwork 9;

[0061] S2. Align the tail hole of the grouting sleeve 8 with the split expansion core tube 1, and slip it onto the split expansion core tube 1 until the tail end face of the grouting sleeve 8 lies flat against the inner side of the side formwork 9;

[0062] S3. Press down the wrench to the self-locking position, so that the pull rod 2 drives the expansion core nut 3 to move into the split expansion core tube 1, thereby expanding the split expansion core tube 1 and clamping tightly against the grouting sleeve 8. At the same time, the return spring is compressed;

[0063] Rotate the wrench from the horizontal state to the vertical state. The wrench pulls the pull rod 2, and the expansion core nut 3 moves deeper into the split expansion core tube 1, causing the end of the split expansion core tube 1 to expand;

[0064] S4. During disassembly, lift the wrench to the release position. The expansion core nut moves towards the end of the split expansion core tube under the elastic force of the return spring, and the outer diameter of the end of the split expansion core tube shrinks. Then, the quick-fixing tooling can be withdrawn from the positioning hole on the side formwork;

[0065] Rotate the wrench from the vertical state to the horizontal state, retract the pull rod 2. The expansion core nut 3 moves towards the end edge of the split expansion core tube 1, and the end of the split expansion core tube 1 resets. Several petal leaves close together, and the outer diameter becomes smaller. Thus, the split expansion core tube 1 of the quick-fixing tooling can be removed from the grouting sleeve 8 without disassembling the side formwork 9.

[0066] In summary, the present invention uses a quick-locking structure to achieve the quick installation of the grouting sleeve, eliminating the need to tighten multiple-turn threaded parts, saving time and effort. The present invention can lift the wall panel component without disassembling the side formwork, directly eliminating the process of repeatedly disassembling and assembling the side formwork, saving a large amount of man-hours. The usage method of the quick-fixing tooling of the present invention is greatly simplified compared to the usage method of the existing fixing tooling, making it easy to operate. Operators can quickly master and apply it to component production, shortening the component production cycle, and effectively enhancing the quick response ability and supply ability of component production enterprises.

[0067] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as within the scope described in this specification.

[0068] The above embodiments only represent several implementation manners of the present invention, and the description is relatively specific and detailed. However, it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent should be subject to the appended claims.

Claims

1. A quick-fixing tooling for grouting sleeves, characterized in that, It includes a split expansion core tube, an expansion core nut, a pull rod and a return spring. The split expansion core tube is arranged inside the grouting sleeve and contacts the sleeve ribs on the inner wall of the grouting sleeve. The split expansion core tube is a hollow cylindrical structure. At one end, a number of slits extending from the end to the middle are evenly provided, making this end a split structure. The expansion core nut is arranged inside this end and abuts against the inner side wall of the split expansion core tube. The circumferential side surface of the end of the split expansion core tube near the expansion core nut is provided with an annular tooth-shaped protrusion. One end of the pull rod is connected to the expansion core nut, and the other end passes through the other end of the split expansion core tube. The return spring is sleeved on the pull rod, with one end abutting against the expansion core nut and the other end abutting against the inner wall of the end of the split expansion core tube. The end of the pull rod passing through the split expansion core tube is connected to a pulling assembly. The pulling assembly includes a wrench, which is a cam wrench. The convex arc surface at the head end of the cam wrench abuts against the end face of the split expansion core tube. A wrench core shaft is provided at the head end of the cam wrench. The end of the pull rod passing through the split expansion core tube is connected to the wrench core shaft. When the cam wrench is pulled from the release position to the self-locking position, the end of the pull rod is pulled, the expansion core nut moves into the split expansion core tube, making the outer diameter of the end of the split expansion core tube larger, and compressing the return spring. When the cam wrench is pulled from the self-locking position to the release position, the return spring resets and pushes the expansion core nut, making the outer diameter of the end of the split expansion core tube retract. A slurry stop ring is provided on the outer periphery of the split expansion core tube, and the slurry stop ring is located at the opening of the grouting sleeve.

2. The quick-fixing tooling for grouting sleeves according to claim 1, characterized in that, The head end of the cam wrench is movably connected to the wrench core shaft and rotates around the wrench core shaft. The pull rod vertically penetrates into the wrench core shaft and is fixedly connected by screws.

3. The quick-fixing tooling for grouting sleeves according to claim 2, characterized in that, A gasket is provided between the cam wrench and the end face of the split expansion core tube.

4. The quick-fixing tooling for grouting sleeves according to claim 3, characterized in that, An arc-shaped groove is provided on the surface of the gasket, and the head end of the cam wrench is located in the arc-shaped groove.

5. The quick-fixing tooling for grouting sleeves according to claim 1, characterized in that, A limit chassis is provided at the end of the split expansion core tube near the pulling assembly, and the diameter of the limit chassis is larger than the diameter of the tube body of the split expansion core tube.

6. The quick-fixing tooling for grouting sleeves according to claim 1, characterized in that, The upper end of the expansion core nut is frustum-shaped, and the inner diameter of the end of the split expansion core tube gradually becomes smaller to form a flared opening adapted to the frustum-shaped upper end of the expansion core nut.

7. A method for using the quick-fixing tooling for grouting sleeves according to claim 5, characterized in that, It includes the following steps: S1. Insert one end of the split expansion core tube of the quick fixing tooling from the outside of the side formwork into the positioning hole on the side formwork, and make the limit chassis flat against the outer side surface of the side formwork. S2. Align the tail hole of the grouting sleeve with the split expansion core tube and sleeved it on the split expansion core tube until the tail end face of the grouting sleeve is flat against the inner side surface of the side formwork. S3. Press down the wrench to the self-locking position, so that the pull rod drives the expansion core nut to move into the split expansion core tube, thereby expanding the split expansion core tube and clamping the grouting sleeve, and at the same time the return spring is compressed. S4. During disassembly, pull up the wrench to the release position. The expansion core nut moves towards the end of the split expansion core tube under the elastic force of the return spring, and the outer diameter of the end of the split expansion core tube retracts, and then the quick fixing tooling can be withdrawn from the positioning hole on the side formwork.

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