Civil engineering construction formwork support mechanism

Abstract

The present invention relates to the field of construction engineering technology, and specifically to a civil engineering construction formwork support mechanism, including vertical poles and horizontal poles, wherein the vertical poles are grouped in pairs and are respectively arranged in parallel on both sides of a wall surface, and each vertical pole is sleeved with a fixing fastener that can be guided to rise and fall along the height direction of the vertical pole, and a snap-fitting hole is provided at one end of the fixing fastener facing the wall surface. The present invention arranges a rotatable sleeve on the sleeve body, and the sleeve can be used to conveniently and quickly fix the entire fixing fastener and the vertical pole. After fixing, the limiting sleeve is snapped on the top of the rotating sleeve. After the snap-fitting holes on both sides of the limiting sleeve fix the horizontal pole, once the horizontal pole moves downward due to force, the entire rotating sleeve will move downward accordingly and increase the bonding strength between the entire fixing fastener and the vertical pole, forming a template support structure with high efficiency and strong effective bonding strength for the arched surface.

Description

Technical Field

[0001] The invention relates to the technical field of construction engineering, and in particular to a civil engineering construction template supporting mechanism. Background Art

[0002] The formwork support structure plays a vital role in the construction field. It not only serves as the basic skeleton of the scaffolding, but also shapes and supports the building.

[0003] The formwork support structure is mostly formed by metal rods in the horizontal and vertical directions. However, for some arched buildings, this rectangular structure is difficult to provide effective support for the arched surface. A large number of fasteners are needed to fix the horizontal rods. However, the nodes on the vertical rods are relatively fixed, and the positions fixed by the fasteners are relatively rigid. Therefore, it is very inconvenient to have multiple horizontal rods contact the arched surface. In this case, the support and fixation of the arched surface are often neglected.

[0004] Therefore, a civil engineering construction formwork support mechanism is proposed to solve the above-mentioned problems. Summary of the invention

[0005] Technical issues solved

[0006] In view of the above-mentioned shortcomings of the prior art, the present invention provides a civil engineering construction formwork support mechanism, which can effectively solve the problem that the fixed fastener structure of the formwork support in the prior art is difficult to support and shape the arched building surface.

[0007] Technical Solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0009] The present invention provides a civil engineering construction formwork support mechanism, comprising vertical poles and horizontal poles, wherein the vertical poles are grouped in pairs and are respectively arranged in parallel on both sides of a wall surface, each vertical pole is sleeved with a fixing fastener which can be guided to rise and fall along the height direction of the vertical pole, and a clamping hole is provided at one end of the fixing fastener facing the wall surface, and the horizontal pole is horizontally placed between the two vertical poles, and the two ends of the horizontal pole are respectively arranged to penetrate the clamping holes on the two fixing fasteners.

[0010] Among them, the fixing fastener includes a clamping sleeve sleeved on the vertical pole and a limiting sleeve movably installed on the upper end of the clamping sleeve, the engaging hole is opened on the limiting sleeve, and a clamping pin which can swing toward the vertical pole body is provided on the end face of the clamping sleeve, and the clamping pin is in the shape of an arc block, and its thickness gradually increases along the circumference of the clamping sleeve, and the thickness of the clamping pin gradually increases from top to bottom. A rotatable rotating sleeve is concentrically sleeved on the outer side of the clamping sleeve, and the top end of the rotating sleeve is in contact with the limiting sleeve, and a stop block is provided on the inner wall of the rotating sleeve, and the movement path of the stop block always intersects with the outer end face of the stop pin.

[0011] Furthermore, the ferrule includes a sleeve body and a limit plate, the sleeve body is cylindrical and is sleeved on the outside of the vertical rod, and the limit plates are provided with two and are distributed in parallel at both ends of the sleeve body, wherein the rotating sleeve is sleeved on the sleeve body and is located between the two limit plates, and a limit ring is provided at the upper and lower ends of the rotating sleeve respectively, and an annular groove is opened at the position of the limit ring corresponding to the limit ring for the limit ring to rotate inside, and the depth of the annular groove is greater than the height of the limit ring.

[0012] Furthermore, a rubber ring is buried in each of the annular grooves.

[0013] Furthermore, a limiting hole is opened in the middle of the limiting sleeve, including a first limiting hole and a second limiting hole in a cylindrical shape. The first limiting hole and the second limiting hole are each provided with a plurality and are arranged in a circle with the vertical rod as the axis. A plurality of clamping rods are arranged in a vertical circle on the upper end of the clamping sleeve. The number of the clamping rods is the same as the number of the first limiting holes and can be plugged into and matched with the first limiting holes. The upper end of the rotating sleeve is provided with a boss for inserting into the second limiting hole. The boss is in the shape of a truncated cone that is short on the top and wide on the bottom, and its maximum diameter is larger than the diameter of the second limiting hole.

[0014] Furthermore, at least two adjacent engaging holes are provided on the limiting sleeve, a rotatable pressing plate is provided between the two adjacent engaging holes, and two ends of the pressing plate extend into the two engaging holes respectively and are perpendicular to the axial directions of the two engaging holes.

[0015] Furthermore, each of the engaging holes is provided with two axial holes, which are symmetrically arranged and each of the axial holes is provided with a guide column that can move toward the engaging hole, wherein the guide column is truncated cone-shaped as a whole, and the end with a shorter diameter faces the inside of the engaging hole.

[0016] Furthermore, the length ratios of the two sides of the pressure plate centered at the hinge point are unequal.

[0017] Furthermore, there are three engaging holes, and a pressing plate is respectively provided between every two engaging holes, and the side of each pressing plate that is longer from the hinge point extends into the engaging hole located at the middle position.

[0018] Furthermore, each of the engaging holes is provided with a resistance block which can be extended and retracted along the radial direction of the engaging hole, and one end of the resistance block facing the middle of the engaging hole is in an arc surface.

[0019] Furthermore, an inclined wedge block is provided at one end of the stop block facing the latch, and the inclined surface of the inclined wedge block is arranged downward.

[0020] Beneficial Effects

[0021] Compared with the known public technology, the technical solution provided by the present invention has the following beneficial effects:

[0022] The present invention provides a rotatable sleeve on the sleeve body, and the entire fixing fastener and the vertical pole can be fixed conveniently and quickly by means of the sleeve. After fixation, the limiting sleeve is buckled on the top of the rotating sleeve. After the horizontal pole is fixed by the engaging holes on both sides of the limiting sleeve, once the horizontal pole moves downward due to force, the entire rotating sleeve will move downward accordingly and increase the bonding strength between the entire fixing fastener and the vertical pole, thereby forming a template support structure with high efficiency and strong effective bonding strength for the arched surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 This is a schematic diagram of a template support structure in an embodiment of the present invention;

[0025] Figure 2 It is a bottom view schematic diagram of the template support structure in an embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the exploded structure of a fixing fastener in an embodiment of the present invention;

[0027] Figure 4 It is a schematic diagram of a partial cross-sectional structure of a rotating sleeve in an embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of a top view of a ferrule in an embodiment of the present invention;

[0029] Figure 6 It is a schematic diagram of a cross-sectional state of a ferrule in an embodiment of the present invention when viewed from bottom;

[0030] Figure 7 This is a schematic diagram of the structure of the bayonet in an embodiment of the present invention;

[0031] Figure 8 It is a schematic diagram of a partial cross-sectional structure of a limiting sleeve in an embodiment of the present invention;

[0032] Fig. 9 In the embodiment of the present invention Figure 8 Schematic diagram of the structure at A in the middle;

[0033] Fig.10 This is a schematic diagram of the decomposed structure of the limit sleeve in an embodiment of the present invention;

[0034] Fig.11It is a schematic diagram of the exploded bottom view structure of the limit sleeve in the embodiment of the present invention;

[0035] Fig.12 In the embodiment of the present invention Fig.11 Schematic diagram of the structure at B in the middle;

[0036] Fig.13 Schematic diagram of the front end cross-sectional structure of the limiting sleeve in an embodiment of the present invention.

[0037] The numbers in the figure represent respectively: 1. vertical pole; 11. horizontal pole; 2. fixing fastener; 21. engaging hole; 211. axial hole; 212. guide column; 213. abutment block; 22. clamping sleeve; 221. bayonet pin; 222. sleeve body; 223. limiting plate; 224. annular groove; 225. rubber ring; 226. clamping rod; 23. limiting sleeve; 231. first limiting hole; 232. second limiting hole; 24. rotating sleeve; 241. abutment block; 2411. inclined wedge block; 242. limiting ring; 243. boss; 25. pressure plate;. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] The present invention will be further described below in conjunction with the embodiments.

[0040] Example:

[0041] Formwork support refers to the formwork support structure used for cast-in-place concrete construction in buildings. It is generally made of steel or wooden beams assembled into formwork brackets, which are supported by scaffolding built with steel or wooden poles, and steel formwork is used in conjunction with concrete construction.

[0042] It is usually a bracket structure composed of multiple vertical poles and horizontal poles. After the vertical poles are fixed vertically, the horizontal poles are fixed on the vertical poles by fasteners. In addition to playing the role of building a scaffold, it also plays a role in supporting and shaping the entire building.

[0043] However, in the construction of some arched doors or windows, the use of horizontal rods to support the inner arch surface is often neglected. Only a small amount of the corners of the rod body are placed on the inner arch surface, but the supporting and solidifying effect is very limited. This architectural style is mostly arranged and fixed in a brick-built manner. When in some humid or rainy environments, the cement will dry slowly. If it is not solidified in time with external force, it will cause the cement to flow, forming a local "vacuum" in the fixed layer or a honeycomb fixed surface, affecting the stability of the entire building. The existing horizontal rods have high requirements on the position of the vertical rods when overlapping, resulting in a limited number of horizontal rods that can be placed on the arch surface, and the arch surface cannot be supported in time.

[0044] To this end, combined with the Figure 1-13 The present invention provides a civil engineering construction formwork support mechanism, which forms a spatial support structure through the combination of vertical poles 1 and horizontal rods 11, and a fixing fastener 2 for fastening the vertical poles 1 and fixing the horizontal rods 11 is arranged on each vertical pole 1, and the vertical poles 1 and the fixing fasteners 2 abandon the traditional screw tightening method (most of the fixing fasteners 2 are annular, and the diameter of the annular fasteners is gradually reduced by screws), and a quick rotation fixation is selected, and after the circumferential fixation is completed, when the horizontal rod 11 fixed on the fixing fastener 2 is subjected to force, it will move downward, and during the downward movement process, the friction between the fixing fastener 2 and the vertical pole 1 is increased, providing further guarantee for the stability of the fixing fastener 2.

[0045] Specifically, the fixing fastener 2 in the present embodiment has a hollow cylindrical structure as a whole, and includes two parts, namely, a sleeve 22 mounted on the vertical pole 1 and a limiting sleeve 23 movably mounted on the upper end of the sleeve 22. When the sleeve 22 moves to a suitable height and a suitable position, the resistance is gradually increased by rotating the rotating sleeve 24 located in the middle of the sleeve 22. There are four recesses distributed at the outer end of the sleeve 22, and each recess is provided with a swingable pin 221. The pin 221 and the sleeve 22 in the present embodiment are designed as an integrated whole. Other hinged structures can also be used in actual use, and no excessive restrictions are made here.

[0046] There are four abutting blocks 241 distributed circumferentially on the inner end surface of the rotating sleeve 24. When the rotating sleeve 24 rotates, the abutting blocks 241 will move to the end surface of the bayonet 221, gradually abutting the bayonet 221 toward the other side of the recess, that is, the outer end of the vertical pole 1, and the abutting force will gradually increase as the rotating sleeve 24 rotates.

[0047] Specifically, the bayonet 221 in the present solution is in the shape of an arc-shaped block as a whole, and the thickness gradually increases from one side in the circumferential direction of the sleeve 22, and the thickness gradually increases from top to bottom. This special shape first increases the squeezing force between the bayonet 221 when the rotating sleeve 24 rotates. When the maximum rotation force is reached, the force between the bayonet 221 and the vertical rod 1 is much greater than the gravity of the fixing fastener 2, and a fixation is formed between the bayonet 221 and the vertical rod 1. At this time, the upper end of the sleeve 22 needs to be fixed.

[0048] In addition, an inclined wedge block 2411 is provided at one end of the stop block 241 facing the latch 221 , and the inclined surface of the inclined wedge block 2411 is arranged downward, so that when the latch 221 moves downward, the inclined wedge block 2411 can further improve the squeezing capacity between the latch 221 and the stop block 241 .

[0049] Specifically, the clamping sleeve 22 in the present scheme includes a sleeve body 222 and a limiting disk 223. The sleeve body 222 is cylindrical and is sleeved on the outer side of the vertical pole 1. The limiting disk 223 is provided with two and parallelly distributed at the two ends of the sleeve body 222, and the rotating sleeve 24 is sleeved on the sleeve body 222 and is located between the two limiting disks 223, and a limiting ring 242 is provided at the upper and lower ends of the rotating sleeve 24 respectively. The limiting disk 223 is provided with an annular groove 224 for the limiting ring 242 to rotate inside at the position corresponding to the limiting ring 242, and the depth of the annular groove 224 is greater than the height of the limiting ring 242.

[0050] Therefore, in addition to being able to rotate in a limited position in the middle of the two limit plates 223, the rotating sleeve 24 can also be raised and lowered to a certain height in the height direction of the vertical pole 1. The specific function will be shown later. When the rotating sleeve 24 reaches the maximum rotation angle or is difficult to continue rotating, it is necessary to move the limit sleeve 23 in the fixing fastener 2 to achieve the purpose of fixing the rotating sleeve 24 and preventing it from being reset.

[0051] Specifically, three bosses 243 are circumferentially distributed on the upper end of the rotating sleeve 24, and the bosses 243 are in the shape of a truncated cone that is short at the top and wide at the bottom. Twelve second limiting holes 232 are circumferentially distributed on the end surface of the limiting sleeve 23, and the maximum diameter of each boss 243 is greater than the diameter of the second limiting hole 232. When the rotating sleeve 24 is rotated, the limiting sleeve 23 is buckled toward the rotating sleeve 24, so that the bosses 243 are inserted into the second limiting holes 232, but cannot be fully inserted. Even if they are fully inserted, they still cannot completely pass through the second limiting holes 232.

[0052] It is worth noting that when the rotating sleeve 24 reaches the maximum rotation angle, the boss 243 can still move a small distance toward the second limit hole 232. After the fixing fastener 2 fixes the horizontal rod 11 and is put into use, when the arched end surface collapses or deforms, a downward force will be generated on the fixing fastener 2. At this time, the force will be converted through the fixing fastener 2 to the rotating sleeve 24 that can be guided to rise and fall along the vertical direction of the vertical pole 1. The rotating sleeve 24 moves downward as a whole. During the downward movement, the stop block 241 will continue to move downward on the outer end surface of the pin 221 as the rotating sleeve 24 moves downward. Since the thickness of the pin 221 gradually increases from top to bottom, the resistance force of the pin 221 to the vertical pole 1 will be further increased, thereby ensuring the bonding strength between the fixing fastener 2 and the vertical pole 1.

[0053] Based on the premise that the fixing fastener 2 will not easily slide off the vertical rod 1, the present solution also provides a micro-correction mechanism composed of a plurality of engaging holes 21 and a pressure plate 25 provided on the fixing fastener 2, which can apply thrust to both sides of the collapsed area as soon as a certain area of ​​the arch surface is deformed and collapsed, thereby preventing the collapse from worsening and playing a protective role.

[0054] Specifically, three engaging holes 21 are respectively provided on both sides of the limiting sleeve 23, and a rotatable pressure plate 25 is provided between two adjacent engaging holes 21, that is, two pressure plates 25 are provided on the three engaging holes 21 on each side, and the rotation directions of the two pressure plates 25 on each side are opposite, and the two ends of each pressure plate 25 extend into the two engaging holes 21 respectively, and are perpendicular to the axial directions of the two engaging holes 21, and the "power arm" of each pressure plate 25 extends to the engaging hole 21 located in the middle position.

[0055] When fixing the horizontal rods 11, try to keep the three horizontal rods 11 on each side in close contact with the arch surface. Even if the two sides cannot be in close contact, they must be as close as possible, and the end face of the middle horizontal rod 11 must be in close contact with the position that is prone to sinking.

[0056] Fine-tuning of the distance between the horizontal rod 11 and the arch surface can be achieved through the interference block 213 located in each engaging hole 21. The end of the interference block 213 facing the middle of the engaging hole 21 is an arc surface, and the other end is connected to a screw. By turning the screw, the interference block 213 can be extended and retracted along the radial direction of the engaging hole 21, thereby reducing the distance between the interference block 213 and the horizontal rod 11.

[0057] It is worth noting that when the resistance block 213 pushes the horizontal rod 11 to move a height no greater than that of the pressure plate 25 when it reaches the maximum rotation path, the other side of the pressure plate 25 will always contact and resist the horizontal rod 11. When the arch surface begins to deform, the force on the horizontal rod 11 in the middle position is increased, and the horizontal rod 11 will resist the two "power arms" located below it, causing the pressure plate 25 to tilt and rest against the two adjacent horizontal rods 11 with an upward force. The horizontal rods 11 on both sides will resist on both sides of the deformation point to avoid further deterioration of the deformation, thereby playing a good role in preventing secondary damage and providing sufficient time for the cement at the joints of bricks or tiles on the arch surface to solidify.

[0058] In order to allow the pressure plate 25 to achieve the best resistance effect, the length ratios of the two sides of the pressure plate 25 centered on the hinge point are unequal, that is, the distance between the two ends of the pressure plates 25 located below the horizontal rod 11 and the hinge point is greater than the distance between the hinge point and the other end, thereby achieving an effect of "the power arm length is greater than the resistance arm length", so that the force of the other end holding up the horizontal rod 11 is maximized.

[0059] Optionally, in order to ensure the best supporting effect for the arched building, in this solution, a vertical pole 1 is provided on both sides of the arched surface, and is arranged parallel to both sides of the wall, so that the fixing fasteners 2 on the vertically arranged vertical poles 1 on both sides can fix the same horizontal pole 11. When the horizontal pole 11 is subjected to force, the vertical pressure can be equally distributed to the two fixing fasteners 2.

[0060] Each vertical pole 1 is provided with a fixing fastener 2 which can be guided to rise and fall along the height direction of the vertical pole 1. A snap-fitting hole 21 is provided at one end of the fixing fastener 2 facing the wall. The horizontal rod 11 is horizontally placed between the two vertical poles 1, and the two ends of the horizontal rod 11 are respectively connected with the snap-fitting holes 21 on the two fixing fasteners 2.

[0061] The engaging hole 21 on the fixing fastener 2 is opened on the limiting sleeve 23, and a locking pin 221 which can swing toward the rod body of the vertical pole 1 is provided on the end face of the locking sleeve 22. The locking pin 221 is in the shape of an arc-shaped block, and its circumferential thickness gradually increases along the locking sleeve 22, and the thickness of the locking pin 221 gradually increases from top to bottom. A rotatable rotating sleeve 24 is concentrically sleeved on the outer side of the locking sleeve 22, and the top end of the rotating sleeve 24 contacts the limiting sleeve 23. A stop block 241 is provided on the inner wall of the rotating sleeve 24, and the movement path of the stop block 241 always intersects with the outer end face of the stop pin 221.

[0062] In order to reduce the noise when the rotating sleeve 24 moves up and down, and to provide a rebound reset effect when the rotating sleeve 24 moves downward due to weight, a rubber ring 225 is embedded in each annular groove 224.

[0063] Optionally, a limiting hole is opened in the middle of the limiting sleeve 23, and in addition to the second limiting hole 232, it also includes a cylindrical first limiting hole 231. There are twelve first limiting holes 231 and second limiting holes 232, and they are arranged in a circle with the vertical rod 1 as the axis. A plurality of clamping rods 226 are arranged in a vertical circle on the upper end of the clamping sleeve 22. The number of the clamping rods 226 is the same as the number of the first limiting holes 231 and can be plugged and matched with the first limiting hole 231. Therefore, when the second limiting hole 232 is inserted on the boss 243, the first limiting hole 231 will also be buckled on the clamping rod 226, and the fixing of the rotating sleeve 24 is completed at this time.

[0064] Due to the rotatability of the rotating sleeve 24 and the limiting sleeve 23, the limiting sleeve 23 can be fixed in multiple directions, further improving the use range of the fixing fastener 2, and when the fixing fastener 2 is subjected to unilateral force, since the first limiting hole 231 is engaged with the upper end of the clamping rod 226, the clamping rod 226 will contact the inner wall of the first limiting hole 231, thereby improving the fixing effect.

[0065] Optionally, two axial holes 211 are provided in each engaging hole 21, and the two axial holes 211 are symmetrically arranged and each axial hole 211 is provided with a guide column 212 that can move toward the engaging hole 21, wherein the guide column 212 is truncated cone-shaped as a whole, and the end with the shorter diameter faces the inside of the engaging hole 21. By using the guide column 212, the height of the guide column 212 in the engaging hole 21 can be adjusted. The higher the height, the greater the thickness of the exposed guide column 212. Under such a limited condition, the horizontal rod 11 can only be placed slightly tilted, thereby achieving the effect of being able to obliquely fix the horizontal rod 11.

[0066] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A civil engineering construction formwork support mechanism, characterized in that: include: Vertical poles, the vertical poles are grouped in pairs and are respectively arranged in parallel on both sides of the wall surface, each vertical pole is sleeved with a fixing fastener that can be guided to rise and fall along the height direction of the vertical pole, and the fixing fastener has a clamping hole at one end facing the wall surface; A horizontal rod, wherein the horizontal rod is horizontally placed between the two vertical rods, and the two ends of the horizontal rod are respectively connected to the engaging holes on the two fixing fasteners; The fixing fastener comprises a clamping sleeve sleeved on the vertical pole and a limiting sleeve movably mounted on the upper end of the clamping sleeve, the clamping hole is provided on the limiting sleeve, and a clamping pin which can swing toward the vertical pole body is provided on the end surface of the clamping sleeve, and the clamping pin is in the shape of an arc block, and its thickness gradually increases along the circumferential direction of the clamping sleeve, and the thickness of the clamping pin gradually increases from top to bottom; A rotatable rotating sleeve is coaxially sleeved on the outer side of the clamping sleeve, the top of the rotating sleeve is in contact with the limiting sleeve, and a stop block is provided on the inner wall of the rotating sleeve, and the movement path of the stop block always intersects with the outer end surface of the bayonet pin; The ferrule comprises a sleeve body and a limiting disk, wherein the sleeve body is cylindrical and sleeved on the outside of the vertical rod; the limiting disks are provided with two and are parallelly distributed at both ends of the sleeve body; wherein the rotating sleeve is sleeved on the sleeve body and is located between the two limiting disks, and a limiting ring is provided at the upper and lower ends of the rotating sleeve respectively, and an annular groove for the limiting ring to rotate inside is provided at the position of the limiting disk corresponding to the limiting ring, and the depth of the annular groove is greater than the height of the limiting ring; The middle part of the limit sleeve is provided with a limit hole, including a first limit hole and a second limit hole in a cylindrical shape, the first limit hole and the second limit hole are provided with a plurality of them and are arranged circumferentially with the vertical rod as the axis, and a plurality of clamping rods are arranged vertically circumferentially on the upper end of the clamping sleeve, the number of the clamping rods is the same as the number of the first limit hole and can be plugged and matched with the first limit hole; Wherein, a boss for inserting into the second limiting hole is provided at the upper end of the rotating sleeve, and the boss is in the shape of a truncated cone which is short at the top and wide at the bottom, and its maximum diameter is larger than the diameter of the second limiting hole.

2. A civil engineering construction formwork support mechanism according to claim 1, characterized in that: A rubber ring is embedded in each of the annular grooves.

3. A civil engineering construction formwork support mechanism according to claim 1, characterized in that: The limiting sleeve is provided with at least two adjacent engaging holes, a rotatable pressing plate is provided between the two adjacent engaging holes, and two ends of the pressing plate extend into the two engaging holes respectively and are perpendicular to the axial directions of the two engaging holes.

4. A civil engineering construction formwork support mechanism according to claim 3, characterized in that: Each of the engaging holes is provided with two shaft holes, the two shaft holes are symmetrically arranged and each shaft hole is provided with a guide column that can move toward the engaging hole; The guide post is in a truncated cone shape as a whole, and the end with a shorter diameter faces the inside of the engagement hole.

5. A civil engineering construction formwork support mechanism according to claim 3, characterized in that: The length ratios of the two sides of the pressing plate centered at the hinge point are unequal.

6. A civil engineering construction formwork support mechanism according to claim 5, characterized in that: There are three engaging holes, and a pressing plate is respectively arranged between every two engaging holes, and the side of each pressing plate which is longer than the hinge point extends into the engaging hole located at the middle position.

7. A civil engineering construction formwork support mechanism according to claim 5, characterized in that: Each of the engaging holes is provided with a resistance block which can be extended and retracted along the radial direction of the engaging hole, and one end of the resistance block facing the middle of the engaging hole is in an arc surface.

8. A civil engineering construction formwork support mechanism according to claim 1, characterized in that: An inclined wedge block is arranged at one end of the stop block facing the latch, and the inclined surface of the inclined wedge block is arranged downward.

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