Anti-ejection device for pre-tensioning prestressed reinforcement
By installing baffles, limiting devices, and comb-type anti-ejection devices in the pre-tensioned prestressed steel bar anti-ejection device, the problem of prestressed steel bar breakage causing injury has been solved, achieving full-process and all-round safety protection and improving construction safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- THE FOURTH BRANCH OF CCCC THIRD HARBOR ENGINEERING CO LTD
- Filing Date
- 2025-04-29
- Publication Date
- 2026-05-12
AI Technical Summary
During the reinforcement binding process of prestressed members using the pre-tensioning method, the prestressing tendons are prone to breakage due to instability or operational deviations, posing a serious safety hazard, especially when working under high stress conditions, which carries the risk of injury.
The prestressed steel bar anti-ejection device adopts a pre-tensioned method, which includes setting baffles at the tensioning end, using steel bar protective layer limiting devices and comb anti-ejection devices, and forming a closed ring with galvanized steel pipes and round steel to prevent the prestressed steel bars from ejecting upwards and sluggish displacement to the left and right. Safety baffles are also set in the tensioning area to provide comprehensive safety protection.
This effectively avoids injuries caused by the ejection of prestressed steel bars, improves the safety of the construction process, reduces safety hazards, and ensures the personal safety of steel bar binding personnel and workers outside the platform.
Smart Images
Figure CN224224177U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of reinforcing bar bulletproof technology, specifically relates to a pre-tensioning prestressed reinforcing bar bulletproof device. BACKGROUND
[0002] As mentioned in the prior art solution with the patent announcement number "CN203514177U", the application of pre-tensioning prestressed members is more and more extensive, the pre-tensioning prestressed member is tensioned before concrete pouring, and the prestressed reinforcing bar in the force holding state is temporarily anchored on the prefabricated pedestal, then the reinforcing cage is successively bound, the formwork is erected, and the concrete is poured, and after the concrete curing reaches the design specified strength, the prestressed reinforcing bar is relaxed, the pre-tensioning prestressed prefabricated member is widely applied in water transportation engineering.
[0003] The pre-tensioning prestressed prefabricated member generally adopts long line method prefabrication, the pedestal length is 50-70m, 5-6 pieces of members can be simultaneously produced, after the prestressed reinforcing bar connected in the whole length is tensioned and anchored, the binding of the stirrup, horizontal bar and other reinforcing bars is carried out, and the complete reinforcing cage is formed, in this process, the reinforcing bar binding personnel need to enter the pedestal to bind the reinforcing bar, and work for a long time under the condition that the prestressed reinforcing bar is in a high stress state, in addition to the fact that the prestressed reinforcing bar itself is unstable and broken, the prestressed reinforcing bar is also prone to overheat, overcurrent and even damage due to operation deviation in the reinforcing bar binding process, the prestressed reinforcing bar is broken and injures people, and there is a serious safety hazard. UTILITY MODEL CONTENTS
[0004] In order to solve the defects in the prior art, the utility model provides a pre-tensioning prestressed reinforcing bar bulletproof device, which effectively avoids the defects in the prior art that in addition to the fact that the prestressed reinforcing bar itself is unstable and broken, the prestressed reinforcing bar is also prone to overheat, overcurrent and even damage due to operation deviation in the reinforcing bar binding process, the prestressed reinforcing bar is broken and injures people, and there is a serious safety hazard.
[0005] The utility model uses the following technical solutions.
[0006] A pre-tensioning prestressed reinforcing bar bulletproof device, comprising:
[0007] A baffle for preventing the upward ejection of the prestressed reinforcing bar is arranged in the tensioning end tensioning frame; a reinforcing bar protection layer limiting device is used to add a limit for preventing the upward ejection of the prestressed reinforcing bar; and a combing bulletproof device is used to prevent the upward ejection and left-right serpentine displacement of the prestressed reinforcing bar.
[0008] Further, the structure of the reinforcing bar protection layer limiting device for adding a limit for preventing the upward ejection of the prestressed reinforcing bar comprises: a prestressed reinforcing bar upward ejection limiting device.
[0009] Further, the prestressed steel upward ejection limiting device comprises a U-shaped steel sheath limiting channel steel welded on the bottom die connected with the prestressed steel.
[0010] Further, the prestressed steel upward ejection limiting device further comprises a protection device added on the U-shaped steel sheath limiting channel steel, which is arranged between the two vertical beams of the U-shaped steel sheath limiting channel steel and at both ends of the prestressed steel.
[0011] Further, the protection device comprises a galvanized steel pipe and a round steel I added on the U-shaped steel sheath limiting channel steel, the galvanized steel pipe is welded on the side of the U-shaped steel sheath limiting channel steel, and the round steel I passes through the galvanized steel pipe to form a closed loop.
[0012] Further, the height of the galvanized steel pipe exceeds the top row of prestressed steels.
[0013] Further, the row comb ejection preventing device is composed of a row comb welded by a round steel II and a channel steel passing through the bottom of the precast beam pedestal.
[0014] Further, the structure of the baffle for preventing the ejection of the prestressed steel in the tensioning end tensioning frame comprises a socket baffle in the tensioning frame, the prestressed steel is fixed with the tensioning frame through a connecting tool screw rod, the outer side steel plate of the tensioning frame is provided with an opening corresponding to the prestressed steel, an angle iron is welded in the outer side steel plate of the tensioning frame to form a socket clamping groove, and a steel plate with a handle arranged at the top is inserted as the baffle.
[0015] Further, the length of the prestressed steel on the pre-tensioning method prestressed beam slab seat is 50-60 m.
[0016] Further, the prestressed steel ejection preventing device of the pre-tensioning method further comprises safety baffles arranged on both sides of the tensioning area and the anchoring end, the safety baffles are welded by steel plates and profile steel frames, and profile steel triangular legs are welded at the bottom.
[0017] The beneficial effects of the utility model lie in that, compared with the prior art, the technical effects of the utility model are as follows:
[0018] (1) simple structure, convenient to use and operate;
[0019] The device is all processed on site by common materials, has simple structure, is light in weight and is convenient to install.
[0020] (2) multiple prevention, greatly reduces the safety hidden danger and improves the safety degree.
[0021] The device provides multiple security guarantees in the whole process and in all directions for the prestressed construction process of the pre-tensioning prestressed beam. The upward ejection limiting device guarantees the safety in the tensioning process and the steel bar binding stage; the two-side safety baffle guarantees the safety on both sides of the bench after the tensioning process and the tensioning completion; the combing ejection prevention device guarantees the safety of the steel bar binding personnel in the bench after the tensioning; and the socket type baffle in the tensioning frame greatly improves the safety of the passage on both sides of the bench after the tensioning completion. BRIEF DESCRIPTION OF DRAWINGS
[0022] Figure 1 Fig. 1 is a structural schematic view of the upward ejection limiting device of the pre-tensioning prestressed steel bar of the pre-tensioning prestressed steel bar ejection prevention device in the utility model.
[0023] Figure 2 Fig. 2 is a three-dimensional schematic view of the combing device of the pre-tensioning prestressed steel bar ejection prevention device in the utility model.
[0024] Figure 3 Fig. 3 is a three-dimensional schematic view of the socket type baffle in the tensioning frame of the pre-tensioning prestressed steel bar ejection prevention device in the utility model.
[0025] Figure 4 Fig. 4 is a whole schematic view of the pre-tensioning prestressed steel bar ejection prevention device in the utility model.
[0026] Fig. 1 is a structural schematic view of the upward ejection limiting device of the pre-tensioning prestressed steel bar of the pre-tensioning prestressed steel bar ejection prevention device in the utility model. DETAILED DESCRIPTION
[0027] At present, the pre-tensioning prestressed prefabricated component generally adopts the long line method for prefabrication, the bench length is 50-70m, 5-6 components can be produced at the same time, after the tensioning anchoring of the prestressed steel bars connected in length is completed, the binding of the stirrup, horizontal bar and other steel bars is carried out, and the complete steel bar framework is formed. In this process, the steel bar binding personnel need to enter the bench to bind the steel bars, and work for a long time under the high stress state of the prestressed steel bars. In addition to the breakage of the prestressed steel bars due to the instability, the prestressed steel bars are also easy to be overheated, overcharged or even damaged due to the operation deviation in the steel bar binding process, the prestressed steel bars are broken and hurt people, and there is a serious safety hazard.
[0028] In view of the existing problems, the utility model provides a pre-tensioning prestressed steel bar ejection prevention device.
[0029] In order to make the purpose, technical scheme and advantages of the utility model clearer, the technical scheme of the utility model will be expressed clearly and completely below in combination with the drawings in the utility model embodiments. The embodiments expressed in the application are only a part of the embodiments of the utility model, not all the embodiments. According to the utility model spirit, other embodiments obtained by the ordinary skilled in the art without making creative labor are all within the protection scope of the utility model.
[0030] As shown in Figure 1 and Figure 2 , a pre-tensioning prestressed steel bullet-proof device, comprising:
[0031] The length of the prestressed steel on the pre-tensioning prestressed beam plate pedestal is 50-60m, after tensioning, the prestressed steel is mainly limited in the pedestal, preventing upward bouncing, left and right serpentine displacement and shooting from the end to hurt people, reducing the security risks and improving the personal safety of the steel binding personnel and the personnel outside the pedestal.
[0032] The pre-tensioning prestressed steel bullet-proof device is mainly composed of three parts, one is to set a baffle for preventing the prestressed steel from shooting in the tensioning end tensioning frame, two is to add a limit for preventing the prestressed steel from upward shooting by using the steel protection layer limiting device, and three is to design and use a comb bullet-proof device to prevent the prestressed steel from upward bouncing and left and right serpentine displacement.
[0033] In the preferred but non-limiting embodiments of the utility model, the structure of the steel protection layer limiting device for adding a limit for preventing the prestressed steel from upward shooting comprises: a prestressed steel upward shooting limiting device.
[0034] In the preferred but non-limiting embodiments of the utility model, the prestressed steel upward shooting limiting device comprises: a U-shaped steel protection layer limiting channel steel 1 welded on the bottom die connected with the prestressed steel. The bottom and side surface net protection layer thickness of the main reinforcement of the prestressed steel are ensured.
[0035] In the preferred but non-limiting embodiments of the utility model, in order to protect the tensioned prestressed steel from shooting to hurt people, the prestressed steel upward shooting limiting device further comprises: a protection device added on the U-shaped steel protection layer limiting channel steel 1 as a prestressed steel protection layer limit, which is arranged between the two vertical beams of the U-shaped steel protection layer limiting channel steel 1 and the two ends of the prestressed line.
[0036] The utility model discloses preferably but non - limitative implementation mode, prestressed reinforcement upward ejection limiting device mainly utilizes the steel bar protective layer limiting device of channel section steel welding, that is U type steel bar protective layer limiting channel section steel 1, and the protective device is including galvanized steel pipe 2 and round steel one 3 of galvanized steel pipe 2 and round steel one 3 that galvanized steel pipe 2 is added on U type steel bar protective layer limiting channel section steel 1, the main method is that the galvanized steel pipe 2 of welding is galvanized steel pipe 2, uses round steel one 3 to pass through galvanized steel pipe, forms the closed loop, prevents the fracture of prestressed reinforcement during tensioning or after tensioning and upward bounce and injures.
[0037] The utility model discloses preferably but non - limitative implementation mode, the height of galvanized steel pipe 2 exceeds the top row prestressed reinforcement.
[0038] The use method of the protective device is that the device is arranged between the two beams of the U-shaped steel bar protective layer limiting channel steel 1 and the prestressed reinforcement connecting section at the two ends of the prestressed line, after the arrangement of the prestressed reinforcement is completed, the round steel is inserted into the galvanized steel pipe in position, all the prestressed reinforcement is closed, and then tensioning operation is carried out.
[0039] The utility model discloses preferably but non - limitative implementation mode, and the comb ejection prevention device is composed of the comb of round steel no.2 4 welding and the channel steel 5 through the bottom of the prefabricated beam pedestal, and the comb tooth spacing is set according to the arrangement of different prestressed reinforcement, and the height and width of the comb are set according to the height of the top row prestressed reinforcement and the width of the prefabricated beam.
[0040] The use method of the comb ejection prevention device is that the comb ejection prevention device is installed after the tensioning of the prestressed reinforcement is completed, is installed at 1 / 4 of the length of each prefabricated beam, and when installing, the comb teeth are vertically inserted between each column of prestressed reinforcement, and the prestressed reinforcement is vertically isolated. The channel steel is connected with the number of feet hooks on both sides of the comb, and is fixed with a wooden wedge, to form a closed system. When the reinforcement is bound, it is bound from both ends to the middle, and the device is removed when it is close.
[0041] The utility model discloses preferably but non - limitative implementation mode, and the structure of the baffle for preventing the ejection of the prestressed reinforcement arranged in the tensioning end tensioning frame includes the socket baffle in the tensioning frame, the prestressed reinforcement is fixed with the tensioning frame 6 through the connecting tool screw rod, and the outer side steel plate of the tensioning frame is provided with the opening 7 corresponding to the prestressed reinforcement, so that the tool screw rod is convenient to pass through, in order to prevent the ejection of the prestressed reinforcement from the two ends of the pedestal after the tensioning is completed, the socket card slot is formed by welding the angle iron 8 in the outer side steel plate of the tensioning frame, and the steel plate with the handle 9 at the top is inserted as the baffle, to prevent the ejection of the prestressed reinforcement from the two ends of the pedestal.
[0042] The use method of the socket baffle in the tensioning frame is that the socket baffle is extracted before tensioning, and is inserted in time after tensioning is completed, to improve safety.
[0043] In the preferred but non-limiting embodiment of the utility model, the length of the prestressed steel bar on the pedestal of the pre-tensioning prestressed beam slab is 50-60m.
[0044] In the preferred but non-limiting embodiment of the utility model, the pre-tensioning prestressed steel bar anti-ejection device further comprises: two safety baffle plates, which close the tensioning area during the tensioning process and the load holding stage, and irrelevant personnel are not allowed to cross the tensioning area, the safety baffle plates are arranged on the opposite sides of the tensioning area and the anchoring end, and the safety baffle plates prevent the prestressed steel bar from breaking and ejecting to injure people.
[0045] The working principle of the pre-tensioning prestressed steel bar anti-ejection device is as follows:
[0046] The pre-tensioning prestressed steel bar anti-ejection device mainly comprises four devices, namely, a limiting device for preventing the prestressed steel bar from being ejected upward, a combing anti-ejection device, two safety baffle plates, and a jack-up plug-in baffle plate in the tensioning frame.
[0047] (1) Operation sequence and use method
[0048] ① After the prestressed steel bars are connected into a whole in the steel bar workshop, the prestressed steel bars are transported to the pedestal, arranged according to the design drawing, and connected and fixed with the tensioning screw rod, and the screw rod is fixed with the tensioning frame and the steel beam.
[0049] ② The upward ejection limiting device is arranged between two beams and the prestressed steel bar connecting section at the two ends of the prestressed line, after the arrangement of the prestressed steel bars is completed, round steel is inserted into the galvanized steel pipe to be in place, all the prestressed steel bars are enclosed, and then the tensioning operation is performed.
[0050] ③ During the tensioning process and the load holding stage of the prestressed steel bar, the tensioning area is closed, irrelevant personnel are not allowed to cross the tensioning area, and the safety baffle plates are arranged on the opposite sides of the tensioning area and the anchoring end to prevent the prestressed steel bar from breaking and ejecting to injure people.
[0051] ④ After the tensioning of the prestressed steel bar is completed, the jack-up plug-in baffle plate in the tensioning frame is installed.
[0052] ⑤ After the tensioning is completed, the combing device is installed. The combing teeth are vertically inserted between each column of prestressed steel bars when the combing device is installed, and the prestressed steel bars are vertically isolated. The two side number hooks of the combing device are connected with the channel steel passing through the bottom of the pedestal and are fixed with wooden wedges to form an enclosure system. When the steel bars are bound, the binding is performed from both ends to the middle, and the device is removed when it is close to the middle.
[0053] The utility model has the advantages that, compared with the prior art, the technical effects of the utility model are as follows:
[0054] (1) The structure is simple, and the operation is convenient;
[0055] The device is made of common materials and is simple in structure and light in weight.
[0056] (2) Multiple prevention greatly reduces the security risks and improves the security.
[0057] The device provides full-process and full-range multiple security for the prestressed construction process of the pre-tensioning prestressed beam. The upward ejection limiting device ensures the safety during the tensioning process and the steel bar binding stage; the two-side safety baffle ensures the safety of the two sides of the bench after the tensioning process and the tensioning completion; the comb ejection prevention device ensures the safety of the steel bar binding personnel in the bench after the tensioning; and the socket type baffle in the tensioning frame greatly improves the safety of the passage on the two sides of the bench after the tensioning completion.
[0058] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present application, but not to limit it. Although the present application has been described in detail with reference to the above examples, those skilled in the art should understand that modifications or equivalent replacements can still be made to the specific embodiments of the present application without departing from the spirit and scope of the present application. Any modifications or equivalent replacements should be covered in the protection scope of the claims of the present application.
Claims
1. A projectile-resistant device for prestressed steel bars using the pre-tensioning method, characterized in that, include: A baffle is installed inside the tensioning frame at the tensioning end to prevent prestressed steel bars from being ejected. A retaining device for the concrete cover is used to prevent the prestressed steel bars from springing upwards. A comb-type anti-ballistic device is used to prevent prestressed steel bars from bouncing upwards and shifting left and right in a serpentine manner.
2. The anti-ballistic device for prestressed steel bars using the pre-tensioning method according to claim 1, characterized in that, The structure that uses a steel reinforcement protective layer limiting device to prevent the upward ejection of prestressed steel bars includes: a prestressed steel bar upward ejection limiting device.
3. The anti-ballistic device for prestressed steel bars according to claim 2, characterized in that, The prestressed steel bar upward ejection limiting device includes: a U-shaped steel bar protective layer limiting channel steel welded on the bottom mold connected to the prestressed steel bar.
4. The anti-ballistic device for pre-tensioned prestressed steel bars according to claim 3, characterized in that, To prevent injury from the ejection of prestressed tendons upon breakage, the upward ejection limiting device for prestressed tendons also includes: adding a protective device to the U-shaped tendon protective layer limiting channel steel. This protective device is installed between the two vertical beams of the U-shaped tendon protective layer limiting channel steel and at both ends of the prestressing line.
5. The anti-ballistic device for prestressed steel bars using the pre-tensioning method according to claim 4, characterized in that, The protective device includes a galvanized steel pipe and a round steel bar installed on the U-shaped steel bar protective layer limiting channel steel; a galvanized steel pipe is welded to the side of the U-shaped steel bar protective layer limiting channel steel, and a round steel bar is used to pass through the galvanized steel pipe to form a closed loop.
6. The anti-ballistic device for prestressed steel bars according to claim 5, characterized in that, The height of the galvanized steel pipe exceeds that of the top row of prestressed tendons.
7. The anti-ballistic device for pre-tensioned prestressed steel bars according to claim 6, characterized in that, The comb-shaped anti-ballistic device consists of a comb welded from two round steel bars and a channel steel that passes through the bottom of the precast beam platform.
8. The anti-ballistic device for prestressed steel bars according to claim 7, characterized in that, The structure of setting a baffle to prevent the prestressed steel bars from being ejected inside the tensioning frame at the tensioning end includes a socket-type baffle inside the tensioning frame. The prestressed steel bars are fixed to the tensioning frame by connecting tool screws. The inner and outer steel plates of the tensioning frame have openings corresponding to the prestressed steel bars. An angle iron is welded into the outer steel plate of the tensioning frame to form a socket groove, and a steel plate with a handle at the top is inserted as a baffle.
9. The anti-ballistic device for prestressed steel bars using the pre-tensioning method according to claim 8, characterized in that, The length of the prestressed steel bars on the prestressed beam slab base in the pre-tensioned method is 50-60m.
10. The anti-ballistic device for pre-tensioned prestressed steel bars according to claim 9, characterized in that, The anti-ballistic device for prestressed steel bars under pretensioning method also includes: safety baffles on both sides, which are set directly opposite each other in the tensioning area and the anchorage end. The safety baffles are welded from steel plates and steel frame, and the bottom is welded with steel triangular support legs.