CN-224224177-U - Pretensioned prestressing steel bar ejection preventing device

CN224224177UCN 224224177 UCN224224177 UCN 224224177UCN-224224177-U

Abstract

The utility model provides a pretensioned prestressing steel ejection preventing device, which belongs to the technical field of steel ejection prevention and comprises a baffle plate for preventing the ejection of prestressing steel in a tensioning end tensioning frame, wherein a limit device for preventing the ejection of the prestressing steel is additionally arranged by a steel protection layer limiting device, and the ejection of the prestressing steel and the left-right serpentine displacement are prevented by a carding ejection prevention ejection preventing device. The defects that in the prior art, besides the prestressed tendons on the pretensioned prestressed girder plate bench are unstable and are stretched, the prestressed tendons are easy to oversire, overstress and even damage caused by operation deviation in the process of binding the steel bars are avoided, the prestressed tendons are stretched and hurt people, and serious potential safety hazards exist.

Inventors

ZHANG ZHAOMIN
DING SHI
PAN GENQIANG
Liu Anzong
RONG CHEN
GAO MIN
WANG CHAOYU
ZHAO JIAJIAN

Assignees

中交三航局第四工程有限公司

Dates

Publication Date: 20260512
Application Date: 20250429

Claims (10)

1. The utility model provides a pretensioned prestressing steel prevents catapulting device which characterized in that includes: the method comprises the steps of arranging a baffle plate in a tensioning frame at a tensioning end for preventing the prestressed reinforcement from being ejected, arranging a limit device for preventing the prestressed reinforcement from being ejected upwards by using a reinforcement protection layer limit device, and preventing the prestressed reinforcement from being ejected upwards and snakelike displacement left and right by using a comb-arranging bulletproof device.
2. The pretensioned prestressed reinforcement ejection preventing device according to claim 1, wherein the structure for additionally installing the limit for preventing the upward ejection of the prestressed reinforcement by using the reinforcement cover limit device comprises the prestressed reinforcement ejection limit device.
3. The pretensioned prestressing steel catapulting prevention device according to claim 2, wherein the prestressing steel catapulting limiting device comprises a U-shaped steel bar protective layer limiting channel steel welded on a bottom die connected with the prestressing steel bar.
4. The pretensioned prestressed reinforcement catapulting prevention device according to claim 3, wherein the prestressed reinforcement catapulting limiting device further comprises a protection device which is arranged between two vertical beams of the U-shaped reinforced reinforcement protective layer limiting channel steel and two ends of a prestressed wire and is added to the U-shaped reinforced reinforcement protective layer limiting channel steel in order to ensure that the tensioned prestressed reinforcement is broken and catapulting to hurt people.
5. The pretensioned prestressing steel catapulting prevention device according to claim 4, wherein the protection device comprises a galvanized steel pipe and a round steel I which are additionally arranged on the U-shaped steel bar protection layer limiting channel steel, the galvanized steel pipe is welded on the side face of the U-shaped steel bar protection layer limiting channel steel, and the round steel I penetrates through the galvanized steel pipe to form a closed loop.
6. The pretensioning prestressed reinforcement anti-ejection device according to claim 5, wherein the galvanized steel pipe has a height exceeding the top row prestressed reinforcement.
7. The pretensioned prestressing steel ejection preventing device according to claim 6, wherein the row comb ejection preventing device is composed of a row comb formed by welding round steel II and a channel steel penetrating through the bottom of the precast beam pedestal.
8. The pre-tensioning method prestressed reinforcement catapulting prevention device according to claim 7, wherein the structure of the baffle plate for preventing the prestressed reinforcement from being ejected is arranged in the tensioning frame at the tensioning end, the structure comprises a socket type baffle plate in the tensioning frame, the prestressed reinforcement is fixed with the tensioning frame through a connecting tool screw rod, the steel plates at the inner side and the outer side of the tensioning frame are provided with holes corresponding to the prestressed reinforcement, socket type clamping grooves are formed in the steel plates at the outer side of the tensioning frame through angle iron welding, and the steel plate with a handle at the top is inserted to serve as the baffle plate.
9. The pretensioned prestressed reinforcement catapulting prevention device according to claim 8, wherein the length of the prestressed reinforcement on the pretensioned prestressed beam plate seat is 50-60 m.
10. The device for preventing the pre-tensioned prestressing steel from being ejected according to claim 9, further comprising two side safety shields, wherein the safety shields are arranged on the two sides of the tensioning area and the two sides of the anchoring end in a right opposite way, the safety shields are formed by welding steel plates and steel frames, and the steel triangle supporting legs are welded at the bottoms of the safety shields.

Description

Pretensioned prestressing steel bar ejection preventing device Technical Field The utility model belongs to the technical field of steel bar bullet prevention, and particularly relates to a pretensioned prestressing steel bar bullet prevention device. Background As mentioned in the prior art scheme of patent publication No. CN203514177U, the pretensioned prestressing member is increasingly used, the pretensioned prestressing member stretches the prestressing tendons before the concrete is poured, temporarily anchors the prestressing tendons in a holding state on the prefabrication pedestal, then sequentially binds the reinforcement cage, supports the formwork, and pours the concrete, and relaxes the prestressing tendons after the concrete is cured to reach the design specified strength, so as to form a prestressing system, and the pretensioned prestressing prefabricated member is widely used in the water transportation engineering. The pretensioning method prestress prefabricated component is generally prefabricated by adopting a long line method, the length of a pedestal is 50-70 m, 5-6 pieces of components can be produced simultaneously, after tensioning and anchoring of pretensioned steel bars connected through length are finished, binding of steel bars such as stirrups and horizontal bars is carried out to form a complete steel bar framework, in the process, steel bar binding personnel need to enter the pedestal to bind the steel bars, long-time operation is carried out under the condition that the prestress bars are in a high stress state, besides the fact that the prestress bars are unstable, the prestress bars are prone to being broken due to operation deviation, excessive fire, excessive electricity and even damage occur in the steel bar binding process, the prestress bars are broken to hurt people, and serious potential safety hazards exist. Disclosure of utility model In order to solve the defects in the prior art, the utility model provides the pre-tensioning method prestressed reinforcement catapulting prevention device, which effectively avoids the defects that the prestressed reinforcement on the pre-tensioning method prestressed beam slab bench in the prior art is unstable and is broken, and the prestressed reinforcement is easy to be overheated, electrified and even damaged due to operation deviation in the binding process of the reinforced bar, so that the prestressed reinforcement is broken and hurts people, and serious potential safety hazards exist. The utility model adopts the following technical scheme. A pretensioned prestressed reinforcement ballistic apparatus comprising: the method comprises the steps of arranging a baffle plate in a tensioning frame at a tensioning end for preventing the prestressed reinforcement from being ejected, arranging a limit device for preventing the prestressed reinforcement from being ejected upwards by using a reinforcement protection layer limit device, and preventing the prestressed reinforcement from being ejected upwards and snakelike displacement left and right by using a comb-arranging bulletproof device. Further, the limit structure for preventing the upward ejection of the prestressed reinforcement by additionally installing the limit device for the reinforcement protection layer comprises the upward ejection limit device for the prestressed reinforcement. Further, the upward ejection limiting device for the prestressed reinforcement comprises a U-shaped reinforcement protective layer limiting channel steel welded on a bottom die connected with the prestressed reinforcement. Furthermore, in order to ensure that the tensioned prestressed reinforcement breaks and ejects to hurt people, the upward ejection limiting device for the prestressed reinforcement further comprises a protection device which is arranged between two vertical beams of the U-shaped steel reinforcement protective layer limiting channel steel and two ends of the prestressed wire, wherein the protection device is added on the U-shaped steel reinforcement protective layer limiting channel steel. The protection device comprises a galvanized steel pipe and a round steel I which are additionally arranged on the U-shaped steel bar protection layer limiting channel steel, wherein the galvanized steel pipe is welded on the side surface of the U-shaped steel bar protection layer limiting channel steel, and the round steel I penetrates through the galvanized steel pipe to form a closed loop. Further, the height of the galvanized steel pipe exceeds the top row of prestressed tendons. Further, the comb arranging and anti-ballistic device consists of a comb arranged by welding round steel II and channel steel penetrating through the bottom of the precast beam pedestal. Further, the structure of the baffle plate for preventing the prestressed reinforcement from being ejected is arranged in the tensioning frame at the tensioning end, the structure comprises a socket type baffle plate in the te