A pre-buried sleeve positioning device for a civil defense door frame wall

Abstract

This invention relates to the field of civil defense engineering construction technology, and in particular to a positioning device for pre-embedded sleeves in civil defense door frame walls. The device includes a shaped sleeve composed of a triangular base component, a square component, and a top plate. The triangular base component has an inclined side and a sharp bottom. The triangular base component and the square component are integrated. The top plate is bolted to the top of the square component. Both sides of the square component and the top plate have L-shaped through grooves. The square component also has a circular groove. The device further includes: In this invention, the shaped sleeve is designed to consist of a triangular base component, a square component, and a top plate. The triangular base component has an inclined side and a sharp bottom, forming a non-circular outer contour with the square component. The inclined surface of the triangular base component can guide concrete flow, reducing bottom stagnation and floating, while avoiding the problems of smooth outer walls, weak adhesion, and easy floating and deflection during vibration of circular pipes.

Description

Technical Field

[0001] This invention relates to the field of civil defense engineering construction technology, specifically to a positioning device for pre-embedded sleeves in civil defense door frame walls. Background Technology

[0002] Pre-embedded conduits in civil defense door frame walls are horizontal conduits embedded in the concrete wall of the door frame wall, mainly used for cables, communication, and protective equipment lines to pass through the civil defense wall. During construction, they are arranged horizontally according to the design location, fixed to the reinforcing steel in the wall, and cast in one go with the concrete. To ensure smooth cable passage and reasonable stress distribution, pre-embedded conduits are mostly made of round steel or plastic pipes with smooth inner walls, facilitating cable passage and subsequent maintenance. The pipe openings must be tightly sealed before pouring to prevent grout from entering and causing blockages. Both ends of the conduit should extend beyond the wall surface as specified, and the embedding position, spacing, and elevation must be accurate.

[0003] During pouring, round holes are drilled in the formwork on both sides according to the outer diameter of the sleeve. The two ends of the sleeve are inserted into the holes, and the openings are sealed with rubber rings or sealant to prevent grout leakage. Wooden wedges, clamps, or tie bolts are then used to temporarily tighten the pipe ends on the outside to limit end displacement. However, this fixing only restrains the pipe openings, and the middle of the sleeve is still suspended between the wall reinforcement bars. Because the outer wall of the pre-embedded sleeve is a smooth round surface, the friction and adhesion between it and the concrete are very weak, and there is a certain gap in the round hole fit. When the concrete is vibrated, it liquefies, generating an upward buoyancy force and lateral pushing on the sleeve. This can easily cause the middle of the sleeve to float, horizontally deviate, and rotate around the axis. When multiple sleeves are arranged side by side, they are more likely to misalign with each other, ultimately causing the embedment elevation and orientation to exceed the tolerance, or even damaging the opening seal, affecting the protective and airtight performance of the air-raid shelter door frame wall. Summary of the Invention

[0004] The purpose of this invention is to provide a positioning device for pre-embedded sleeves in the frame wall of civil defense doors, which solves the problems of smooth outer walls, weak adhesion, and easy floating and deflection of round pipes during vibration.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a positioning device for a pre-embedded sleeve in a civil defense door frame wall, comprising a special-shaped sleeve, the special-shaped sleeve being composed of a triangular base component, a square component, and a top plate. The sides of the triangular base component are inclined and the bottom is sharp. The triangular base component and the square component are integrated. The top plate is bolted to the top of the square component. Both sides of the surface of the square component and the top plate are provided with L-shaped through grooves. The surface of the square component is also provided with a circular groove. The device further includes: A telescopic lateral anchoring mechanism is provided inside the through groove, and the telescopic lateral anchoring mechanism is flush with the side of the square piece when not under pressure. A closed pressure triggering mechanism is disposed on the top of the square piece and communicates with the interior of the through groove. The top of the closed pressure triggering mechanism is in a convex state under normal conditions and pushes the telescopic lateral anchoring mechanism to protrude from the side of the square piece when compressed.

[0006] Preferably, the telescopic lateral anchoring mechanism includes an anchoring elastic sleeve, a force-applying rod, and a second sliding sleeve. The second sliding sleeve is bolted to the inner wall of the through groove and allows the force-applying rod to slide. The anchoring elastic sleeve is located at the outlet end of the through groove on the side of the square piece. The surface of the force-applying rod is also provided with a hollowed-out groove, and a connecting column is welded to the inner wall of the hollowed-out groove.

[0007] Preferably, the surface of the force-applying rod is further welded with several transverse strips that are slidably connected to the inner wall of the second sliding sleeve, the inner wall of the through groove is further welded with a first fixing ring, and the surface of the anchoring elastic sleeve is further provided with a second annular groove, and the first fixing ring is embedded in the inside of the second annular groove.

[0008] Preferably, the closed pressure triggering mechanism includes a vertical cylinder, a trigger elastic sleeve, a movable rod, a circular plate, and an internal vibration-sensing downward striking assembly. The vertical cylinder is bolted to the top of the top plate and communicates with the outlet at the top of the through slot. The trigger elastic sleeve is bonded to the outlet at the top of the vertical cylinder. A first sliding sleeve is bolted to the lower part of the inner wall of the vertical cylinder for the movable rod to slide. The circular plate is bolted to the surface of the movable rod. A first elastic element is also sleeved on the surface of the movable rod. The two ends of the first elastic element are in contact with the bottom of the circular plate and the surface of the first sliding sleeve, respectively. A connector is bolted to the bottom end of the movable rod. A push-pull rod is rotatably connected to the surface of the connector, and the other end of the push-pull rod is rotatably connected to a connecting column.

[0009] Preferably, the top of the first sliding sleeve is also bolted with a collar to prevent the bottom end of the first elastic element from shifting.

[0010] Preferably, the surface of the trigger elastic sleeve is further provided with a first annular groove, and the inner wall embedded at the top entrance of the vertical cylinder is further welded with a second fixing ring, which is embedded inside the first annular groove. The surface of the movable rod is further welded with a vertical strip that is slidably connected to the inner wall of the first sliding sleeve.

[0011] Preferably, the internal vibration-sensing downward striking assembly consists of a vertical groove, a second elastic element, a circular plate, and an impact block. The vertical groove is formed on the surface of the inner wall of the movable rod. The circular plate is slidably connected to the surface of the inner wall of the vertical groove. The two ends of the second elastic element are respectively fixed to the inner wall of the vertical groove and the surface of the circular plate. The impact block is disposed below inside the vertical groove.

[0012] Preferably, both the first and second elastic elements are compression springs. The two ends of the second elastic element are respectively fixed to the inner wall of the vertical groove and the surface of the circular plate through hooks. The impact block is a solid metal ball. When the second elastic element is in a stretched state under the action of gravity, the circular plate leaves a vertical movement range for the impact block below it.

[0013] Preferably, the top end of the movable rod that contacts the inner wall of the triggering elastic sleeve is designed as a circular surface larger than its own outer diameter, and the end of the push-pull rod that contacts the anchoring elastic sleeve is designed as a hemispherical shape with the same outer diameter as itself.

[0014] Preferably, the inclination angle of the side of the triangular base component is 45 to 60°.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In this invention, the irregularly shaped sleeve is designed to consist of a triangular base component, a square component, and a top plate. The triangular base component has an inclined side and a sharp bottom end, forming a non-circular outer contour with the square component. The inclined surface of the triangular base component can guide the concrete flow, reduce bottom retention and floating, and at the same time avoid the problems of smooth outer wall of round pipe, weak bonding, and easy floating and deflection during vibration.

[0016] 2. In use, when the concrete overflows the vertical cylinder and the trigger elastic sleeve, the static pressure overcomes the pre-tightening force of the first elastic element, triggering the elastic sleeve to contract. The movable rod descends, and the connecting piece drives the push-pull rod to push the force-applying rod, causing the anchoring elastic sleeve to bulge outward and enter the uncured concrete, forming a lateral anchoring point. After the concrete solidifies, the anchoring elastic sleeve mechanically engages with the concrete, resisting upward floating, horizontal deviation, and rotation around the axis. The second sliding sleeve, transverse strip, hollowed-out groove, and connecting column facilitate the stable sliding of the force-applying rod. The first fixing ring, the second annular groove, and the sealant prevent grout from entering, ensuring reliable pressure triggering and lateral anchoring.

[0017] 3. In this invention, the internal vibration-sensing downward impact assembly utilizes the high-frequency micro-vibration of the vertical groove during vibration to cause the impact block to bounce up and down. When the impact block contacts the circular plate upwards, the second elastic element absorbs and stores energy, buffering the upward impact and preventing reverse pushing against the trigger elastic sleeve and movable rod. Subsequently, the second elastic element releases energy, and the impact block accelerates downwards under the action of gravity to impact the lower part of the vertical groove or the inner wall of the movable rod, forming a unidirectional downward impact. This impact is transmitted to the force-applying rod through the movable rod, connecting piece, and push-pull rod, so that the anchoring elastic sleeve receives intermittent outward extrusion force, continuously expands into the uncured concrete and prevents retraction, enhances the reliability of the anchoring action, and ensures that the closed pressure triggering mechanism operates in a single direction. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure in this invention; Figure 2 This is a partial cross-sectional structural diagram of the present invention; Figure 3 For the present invention Figure 2 Enlarged structural diagram at point A; Figure 4 This is a schematic cross-sectional view of the square component and the top plate in this invention; Figure 5 For the present invention Figure 4 Enlarged structural diagram at point B; Figure 6 This is a cross-sectional view of the vertical cylinder in this invention; Figure 7 This is a cross-sectional view of the vertical cylinder, the first sliding sleeve, and the collar in this invention; Figure 8 This is a schematic diagram of the trigger elastic sleeve in this invention; Figure 9 This is a schematic diagram of the movable rod and its surface in this invention; Figure 10 This is a cross-sectional view of the movable rod in this invention; Figure 11 This is a schematic diagram of the force-applying rod and its surface in this invention; Figure 12 This is a schematic diagram of the structure of the anchoring elastic sleeve in this invention.

[0019] In the diagram: 100, irregularly shaped sleeve; 110, triangular base component; 120, square component; 121, through groove; 122, first fixing ring; 130, circular groove; 140, top plate; 200, enclosed pressure triggering mechanism; 210, vertical cylinder; 211, second fixing ring; 220, triggering elastic sleeve; 221, first annular groove; 230, movable rod; 231, vertical bar; 240, circular plate; 250, first elastic element; 260. First sliding sleeve; 261, collar; 270, connector; 280, push-pull rod; 290, internal vibration-sensing downward impact assembly; 291, vertical groove; 292, second elastic element; 293, circular plate; 294, impact block; 300, telescopic lateral anchoring mechanism; 310, anchoring elastic sleeve; 311, second annular groove; 320, force-applying rod; 321, transverse bar; 322, hollowed-out groove; 323, connecting column; 330, second sliding sleeve. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see Figures 1-12 As shown, a positioning device for a pre-embedded sleeve in a civil defense door frame wall includes a special-shaped sleeve 100, which is composed of a triangular base component 110, a square component 120, and a top plate 140. The sides of the triangular base component 110 are inclined and the bottom is sharp. The triangular base component 110 and the square component 120 are integrated. The top plate 140 is bolted to the top of the square component 120. Both sides of the square component 120 and the top plate 140 have L-shaped through grooves 121. The device also includes a telescopic lateral anchoring mechanism 300 and a closed pressure triggering mechanism 200. The telescopic lateral anchoring mechanism 300 is located inside the through groove 121. When not under pressure, the telescopic lateral anchoring mechanism 300 is flush with the side of the square member 120. The closed pressure triggering mechanism 200 is located on the top of the square member 120 and communicates with the inside of the through groove 121. The top of the closed pressure triggering mechanism 200 is in a convex state under normal conditions, and when under pressure and contraction, it pushes the telescopic lateral anchoring mechanism 300 to protrude from the side of the square member 120. The surface of the square member 120 is also provided with a circular groove 130, which is used for the power supply line to pass through after the pre-embedded construction is completed.

[0022] Specifically, the telescopic lateral anchoring mechanism 300 includes an anchoring elastic sleeve 310, a force-applying rod 320, and a second sliding sleeve 330. The second sliding sleeve 330 is bolted to the inner wall of the through groove 121 and allows the force-applying rod 320 to slide. The anchoring elastic sleeve 310 is located at the outlet end of the through groove 121 on the side of the square piece 120. The surface of the force-applying rod 320 is also provided with a hollowed-out groove 322, and a connecting column 323 is welded to the inner wall of the hollowed-out groove 322.

[0023] Furthermore, the surface of the force-applying rod 320 is welded with several transverse strips 321 that slide in connection with the inner wall of the second sliding sleeve 330. The force-applying rod 320 slides along the inner wall of the second sliding sleeve 330 via the transverse strips 321, increasing motion stability and preventing deviation. The inner wall of the through groove 121 is also welded with a first fixing ring 122. The surface of the anchoring elastic sleeve 310 is also provided with a second annular groove 311, and the first fixing ring 122 is embedded in the inside of the second annular groove 311. During assembly, when the anchoring elastic sleeve 310 enters the side port of the square piece 120 in the through groove 121, the first fixing ring 122 is located inside the second annular groove 311, and sealant is injected to fill the gap between the anchoring elastic sleeve 310 and the inner wall of the through groove 121, preventing external concrete from entering.

[0024] Furthermore, the closed pressure triggering mechanism 200 includes a vertical cylinder 210, a trigger elastic sleeve 220, a movable rod 230, a circular plate 240, and an internal vibration-sensing downward striking assembly 290. The vertical cylinder 210 is bolted to the top of the top plate 140 and communicates with the outlet at the top of the through groove 121. The trigger elastic sleeve 220 is bonded to the outlet at the top of the vertical cylinder 210. A first sliding sleeve 260 is bolted to the lower part of the inner wall of the vertical cylinder 210 for the movable rod 230 to slide. The circular plate 240 is bolted to the surface of the movable rod 230. A first elastic element 250 is also sleeved on the surface of the movable rod 230. The two ends of the first elastic element 250 are in contact with the bottom of the circular plate 240 and the surface of the first sliding sleeve 260, respectively. A connector 270 is bolted to the bottom end of the movable rod 230. A push-pull rod 280 is rotatably connected to the surface of the connector 270, and the other end of the push-pull rod 280 is rotatably connected to the connecting column 323.

[0025] Under normal conditions, the top of the trigger elastic sleeve 220 is not under force. The first elastic element 250 applies upward force to the surface of the movable rod 230 through the circular plate 240, so that the top of the movable rod 230 contacts the inner wall of the trigger elastic sleeve 220 and is in a convex state. At the same time, the movable rod 230 moves upward and drives the connecting piece 270 and the push-pull rod 280 to move upward. The push-pull rod 280 pulls the transverse force-applying rod 320 towards the direction of the second sliding sleeve 330 through the connecting column 323, without applying pressure to the anchor elastic sleeve 310. At this time, the anchor elastic sleeve 310 is flush with the side of the square piece 120.

[0026] Furthermore, a collar 261 is bolted to the top of the first sliding sleeve 260 to prevent the bottom end of the first elastic element 250 from shifting. A first annular groove 221 is also provided on the surface of the trigger elastic sleeve 220. A second fixing ring 211 is also welded to the inner wall of the top entrance of the vertical cylinder 210, and the second fixing ring 211 is embedded in the first annular groove 221. The trigger elastic sleeve 220 seals the top entrance of the vertical cylinder 210. At the same time, the first annular groove 221 of the trigger elastic sleeve 220 and the second fixing ring 211 are engaged. Sealant is injected between the trigger elastic sleeve 220 and the inner wall of the vertical cylinder 210 to increase the sealant. With the cooperation of the trigger elastic sleeve 220 and the anchoring elastic sleeve 310, concrete is prevented from entering the internal structure. A vertical strip 231 that slides and connects to the inner wall of the first sliding sleeve 260 is also welded to the surface of the movable rod 230, so that the movable rod 230 can only move in a straight line along the inner wall of the first sliding sleeve 260, avoiding the side rotation of the movable rod 230.

[0027] During the pre-embedding process, holes formed by triangles and directions are reserved on the wall template. Filler is installed inside the circular groove 130, and then concrete is injected into the wall template. During concrete injection, because it is not circular, there is no deflection. The inclination angle of the side of the triangular base component 110 is such that when the concrete contacts the triangular base component 110, the bottom slope guides the flow, preventing buoyancy from the concrete during injection. Furthermore, since the upper trigger elastic sleeve 220 is not compressed, the anchoring elastic sleeve 310 does not bulge, preventing the increase of lateral surface area from causing bulging. The increased surface area further avoids the risk of floating. Then, the concrete overflows the vertical cylinder 210 and the trigger elastic sleeve 220 above. When the static pressure of the concrete above is greater than that of the first elastic element 250 and the lateral force that the concrete exerts on the anchoring elastic sleeve 310, the trigger elastic sleeve 220 contracts inward and drives the movable rod 230 and the connecting piece 270 to descend. At the same time, the push-pull rod 280 pushes the force-applying rod 320, which squeezes the anchoring elastic sleeve 310 to extend outward and form an anchoring point. At this time, the concrete has not yet solidified, and the anchoring elastic sleeve 310 can push open the concrete and enter. The inclination angle of the side of the triangular base component 110 is 45 to 60°, preferably 45°. This angle ensures that the bottom slope has a good guiding effect, allowing the concrete to flow along the slope without easily forming stagnation and concentrated buoyancy below the triangular base component 110. It also ensures that the triangular base component 110 forms a reliable anti-rotation constraint in the formwork hole, preventing the sleeve from rotating around the axis. If the inclination angle is too small, the bottom will be too sharp, increasing the concrete flow resistance and the tip may easily damage the formwork. If the inclination angle is too large, the guiding effect will be weakened, and the anti-buoyancy and anti-rotation effects will decrease. Pre-reserving irregularly shaped holes on the wall formwork to match the triangular base component 110 and the square component 120 can further restrict the circumference of the sleeve. The circular groove 130 is filled with a material that can be used for temporary sealing or positioning to prevent grout from entering. After the concrete overflows the vertical cylinder 210 and the trigger elastic sleeve 220, the static pressure gradually increases. When the static pressure overcomes the pre-tightening force of the first elastic element 250 and the lateral resistance of the anchor elastic sleeve 310, the trigger elastic sleeve 220 contracts, the movable rod 230 descends, and the connecting piece 270 and the push-pull rod 280 push the force-applying rod 320. The force-applying rod 320 squeezes the anchor elastic sleeve 310 to extend outward. The anchor elastic sleeve 310 forms a lateral anchor point in the uncured concrete. After the concrete cures, the anchor point forms a mechanical engagement with the concrete, thereby effectively resisting floating, displacement and rotation.

[0028] Furthermore, the top of the movable rod 230 that contacts the inner wall of the trigger elastic sleeve 220 is designed with a circular surface larger than its own outer diameter, and the end of the push-pull rod 280 that contacts the anchor elastic sleeve 310 is designed with a hemispherical shape with the same outer diameter as itself. The diameter of the circular surface at the top of the movable rod 230 is preferably 1.5 to 2.5 times the outer diameter of the movable rod 230, more preferably twice. This increases the contact area with the inner wall of the trigger elastic sleeve 220, ensuring uniform force distribution when the trigger elastic sleeve 220 is compressed, avoiding localized excessive stretching or puncture. Simultaneously, the circular surface... The edges can be rounded to reduce stress concentration; the end of the push-pull rod 280 that contacts the anchoring elastic sleeve 310 is designed in a hemispherical shape with the same outer diameter as itself, which can reduce the friction and local compression between the end of the push-pull rod 280 and the inner wall of the anchoring elastic sleeve 310, so that the push-pull rod 280 can still smoothly push the anchoring elastic sleeve 310 when the angle changes, and avoid the sharp end from piercing the anchoring elastic sleeve 310. The hemispherical end can also make the thrust distributed along the normal of the contact point, so that the anchoring elastic sleeve 310 bulges outward more evenly, forming a stable lateral anchoring shape, rather than local bulging or tearing.

[0029] Furthermore, the internal vibration-sensing downward striking component 290 is composed of a vertical groove 291, a second elastic element 292, a circular plate 293, and an impact block 294. The vertical groove 291 is formed on the surface of the inner wall of the movable rod 230. The circular plate 293 is slidably connected to the surface of the inner wall of the vertical groove 291. The two ends of the second elastic element 292 are respectively fixed to the inner wall of the vertical groove 291 and the surface of the circular plate 293. The impact block 294 is located below the interior of the vertical groove 291. The first elastic element 250 and the second elastic element 292 are both compression springs. The two ends of the second elastic element 292 are respectively fixed to the inner wall of the vertical groove 291 and the surface of the circular plate 293 by hooks. The impact block 294 is made of solid metal ball. When the second elastic element 292 is in a stretched state under the action of gravity, the circular plate 293 leaves a vertical movement range for the impact block 294 below it.

[0030] During the vibration process, the concrete vibration causes the movable rod 230 and the vertical groove 291 to generate high-frequency micro-vibrations as a whole, and the impact block 294 bounces up and down within the vertical groove 291. When the impact block 294 moves upward and contacts the circular plate 293, the circular plate 293 compresses the second elastic element 292. The second elastic element 292 absorbs and stores energy, buffering the upward impact of the impact block 294 and preventing an upward reaction force on the movable rod 230 and the trigger elastic sleeve 220. Subsequently, the second elastic element 292 releases energy and pushes the circular plate 293, while the impact block 294 accelerates downward under the action of gravity, causing the impact block 294 to strike the lower part of the vertical groove 291 or the inner wall of the movable rod 230 at a greater speed, forming a downward impact similar to a hammer blow. This downward impact is transmitted through the movable rod 230, connecting... The connector 270 and push-pull rod 280 transmit the force to the force-applying rod 320, causing the force-applying rod 320 to apply intermittent, outward compressive force to the anchoring elastic sleeve 310. This causes the anchoring elastic sleeve 310 to continuously expand outward and enter the uncured concrete during vibration, preventing the anchoring elastic sleeve 310 from retracting due to the lateral pressure of the concrete. Since the upward movement is buffered by the second elastic element 292, while the downward movement is accelerated and enhanced, the impact block 294 generally only applies a downward force to the inner wall of the vertical groove 291. This unidirectional impact enhances the reliability of the anchoring action, allowing the anchoring elastic sleeve 310 to form a stable anchoring point before the concrete initially sets. At the same time, it does not generate reverse pushing on the triggering elastic sleeve 220 and the movable rod 230, ensuring that the closed pressure triggering mechanism 200 has a single and reliable direction of action.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0032] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A positioning device for a pre-embedded sleeve in a civil defense door frame wall, comprising a special-shaped sleeve (100), characterized in that: The shaped sleeve (100) is composed of a triangular base component (110), a square component (120), and a top plate (140). The side of the triangular base component (110) is inclined and the bottom is sharp. The triangular base component (110) and the square component (120) are integrated. The top plate (140) is bolted to the top of the square component (120). Both sides of the surface of the square component (120) and the top plate (140) are provided with L-shaped through grooves (121). The surface of the square component (120) is also provided with a circular groove (130). The device also includes: A telescopic lateral anchoring mechanism (300) is disposed inside the through groove (121), and the telescopic lateral anchoring mechanism (300) is flush with the side of the square piece (120) when not under pressure; A closed pressure triggering mechanism (200) is disposed on the top of the square piece (120) and communicates with the interior of the through groove (121). The top of the closed pressure triggering mechanism (200) is in a convex state under normal conditions and pushes the telescopic lateral anchoring mechanism (300) to protrude from the side of the square piece (120) when compressed.

2. The positioning device for the pre-embedded sleeve of a civil defense door frame wall according to claim 1, characterized in that: The telescopic lateral anchoring mechanism (300) includes an anchoring elastic sleeve (310), a force-applying rod (320), and a second sliding sleeve (330). The second sliding sleeve (330) is bolted to the inner wall of the through groove (121). The second sliding sleeve (330) allows the force-applying rod (320) to slide. The anchoring elastic sleeve (310) is located at the outlet end of the through groove (121) on the side of the square piece (120). The surface of the force-applying rod (320) is also provided with a hollowed-out groove (322). A connecting column (323) is welded to the inner wall of the hollowed-out groove (322).

3. The positioning device for the pre-embedded sleeve of a civil defense door frame wall according to claim 2, characterized in that: The surface of the force-applying rod (320) is also welded with several transverse strips (321) that are slidably connected to the inner wall of the second sliding sleeve (330). The inner wall of the through groove (121) is also welded with a first fixing ring (122). The surface of the anchoring elastic sleeve (310) is also provided with a second annular groove (311), and the first fixing ring (122) is embedded in the interior of the second annular groove (311).

4. A positioning device for a pre-embedded sleeve in a civil defense door frame wall according to claim 2, characterized in that: The closed pressure triggering mechanism (200) includes a vertical cylinder (210), a trigger elastic sleeve (220), a movable rod (230), a circular plate (240), and an internal vibration-sensing downward striking assembly (290). The vertical cylinder (210) is bolted to the top of the top plate (140) and communicates with the outlet at the top of the through groove (121). The trigger elastic sleeve (220) is bonded to the outlet at the top of the vertical cylinder (210). A first sliding sleeve (260) is bolted to the lower part of the inner wall of the vertical cylinder (210) for the movable rod (230) to slide. The circular plate (240) is bolted to the surface of the movable rod (230). The surface of the movable rod (230) is also fitted with a first elastic element (250). The two ends of the first elastic element (250) are in contact with the bottom of the circular plate (240) and the surface of the first sliding sleeve (260), respectively. The bottom end of the movable rod (230) is bolted with a connector (270). The surface of the connector (270) is rotatably connected with a push-pull rod (280), and the other end of the push-pull rod (280) is rotatably connected to the connecting column (323).

5. A positioning device for a pre-embedded sleeve in a civil defense door frame wall according to claim 4, characterized in that: The top of the first sliding sleeve (260) is also bolted with a collar (261) to prevent the bottom end of the first elastic element (250) from shifting.

6. A positioning device for a pre-embedded sleeve in a civil defense door frame wall according to claim 4, characterized in that: The surface of the trigger elastic sleeve (220) is also provided with a first annular groove (221), and the inner wall embedded at the top entrance of the vertical cylinder (210) is also welded with a second fixing ring (211), and the second fixing ring (211) is embedded in the inside of the first annular groove (221). The surface of the movable rod (230) is also welded with a vertical strip (231) that is slidably connected to the inner wall of the first sliding sleeve (260).

7. A positioning device for a pre-embedded sleeve in a civil defense door frame wall according to claim 4, characterized in that: The internal vibration-sensing downward striking assembly (290) is composed of a vertical groove (291), a second elastic element (292), a circular plate (293), and an impact block (294). The vertical groove (291) is formed on the surface of the inner wall of the movable rod (230). The circular plate (293) is slidably connected to the surface of the inner wall of the vertical groove (291). The two ends of the second elastic element (292) are respectively fixed to the inner wall of the vertical groove (291) and the surface of the circular plate (293). The impact block (294) is disposed below the interior of the vertical groove (291).

8. A positioning device for a pre-embedded sleeve in a civil defense door frame wall according to claim 7, characterized in that: The first elastic element (250) and the second elastic element (292) are both compression springs. The two ends of the second elastic element (292) are respectively fixed to the inner wall of the vertical groove (291) and the surface of the circular plate (293) by hooks. The impact block (294) is a solid metal ball. When the second elastic element (292) is in a stretched state under the action of gravity, the circular plate (293) leaves a vertical movement range for the impact block (294) below the circular plate (293).

9. A positioning device for a pre-embedded sleeve in a civil defense door frame wall according to claim 4, characterized in that: The top of the movable rod (230) that contacts the inner wall of the trigger elastic sleeve (220) has a circular surface design larger than its own outer diameter, and the end of the push-pull rod (280) that contacts the anchoring elastic sleeve (310) has a hemispherical design with the same outer diameter as itself.

10. A positioning device for a pre-embedded sleeve in a civil defense door frame wall according to claim 1, characterized in that: The inclination angle of the side of the triangular base component (110) is 45 to 60°.

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