Height adjusting device for cast-in-place box girder support
By designing a height adjustment device including fixed pipe and sleeve, the problems of rust and dust entering the screw in the prior art are solved, and the smooth cooperation between the screw and the vertical rod and thread protection are achieved, which extends the service life.
Patent Information
- Application Number
- CN202420972238.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-07
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-05-07
AI Technical Summary
The screws of existing cast-in-place box beam brackets are prone to rust and dust is prone to enter the screw and nut during construction, resulting in poor coordination, and the friction between the screw and the vertical rod is large, which is easy to cause thread damage.
A height adjustment device including a top support body, a screw, a nut, a first and a second fixing tube, a support plate, a sleeve and a bolt are designed to prevent the screw from being exposed to the air by design of the fixing tube and sleeve, thereby reducing the exposure of the screw to the air. Dust enters and is secured to the upright through the sleeve, reducing displacement of the nut and screw, thereby reducing friction.
Effectively prevent the screw from rusting, reduce dust entering, improve the smoothness of the nut and screw, reduce the friction between the screw and the vertical rod, protect the threads, and extend the service life.
Smart Images
Figure CN222251781U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of bridge construction, in particular to a height adjusting device for a cast-in-place box beam support. Background Art
[0002] my country has a vast land area and complex and diverse terrain. For economic development, more and more expressways are being built. In the process of expressway construction, bridges need to be built in areas with uneven terrain. Box girders are commonly used in bridge projects, and box girders are divided into prefabricated box girders and cast-in-place box girders. Cast-in-place box girders require support from brackets, and brackets generally use bowl-hook brackets. When in use, first compact and level the bracket foundation in layers, pad the bottom of the bowl-hook bracket with a steel plate, and add a top support (generally called a top screw during construction) on the top to adjust the height of the template through the top support.
[0003] The existing jacking support includes a supporting plate, a screw and a nut. When in use, the screw is inserted into the vertical pole, and the length of the screw inserted into the vertical pole is adjusted by rotating the nut, thereby controlling the distance that the top end of the screw exceeds the vertical pole and adjusting the height of the supporting plate. However, in actual use, since the screw is directly exposed to the air, the air contacts the screw, and the screw is prone to rust, which makes the fit between the screw and the nut not smooth. In addition, during disassembly or construction, some dust and powder are also easy to be separated onto the screw or enter between the nut and the screw, affecting the fit between the screw and the nut. Moreover, after the existing screw is inserted into the vertical pole, the supporting plate at the top of the screw is prone to displacement of the screw after being subjected to force, causing greater friction between the screw and the vertical pole, and also easily damaging the thread on the screw. Utility Model Content
[0004] The utility model aims to provide a height adjustment device for a cast-in-place box beam support, which can protect the screw rod of the top support and reduce the thread wear on the screw rod.
[0005] The height adjustment device for the cast-in-place box girder support comprises a top supporting body, which comprises a vertically arranged screw rod, a support plate fixed to the top of the screw rod, a nut arranged on the screw rod, a first fixing tube independently sleeved on the screw rod above the nut, a second fixing tube independently sleeved on the first fixing tube, the top end of the second fixing tube being fixed to the bottom of the support plate, a sleeve independently arranged below the screw rod, a first bolt arranged on the sleeve for fixing it to the vertical pole, and the sleeve being connected to the nut through a connecting mechanism.
[0006] Furthermore, a first fixing ring is fixed to the bottom of the support plate inside the second fixing tube, the screw is located on the inner side of the first fixing ring, the outer wall of the first fixing ring is provided with a first external thread, and the inner wall of the top of the second fixing tube is provided with a first internal thread threadably matched with the first external thread.
[0007] Furthermore, a second fixing ring is fixed on the top of the nut inside the first fixing tube, the screw is located in the second fixing ring, the outer wall of the second fixing ring is provided with a second external thread, and the inner wall of the bottom of the first fixing tube is provided with a second internal thread threadably matched with the second external thread.
[0008] Furthermore, the connecting mechanism includes a third fixing tube vertically fixed on the bottom of the nut, a fourth fixing tube is independently installed in the third fixing tube, the screw is located in the fourth fixing tube, the bottom end of the fourth fixing tube is fixed to the outer wall of the sleeve through a fixing plate, and the third fixing tube is provided with a second bolt for fixing it to the fourth fixing tube.
[0009] Furthermore, a third fixing ring is fixed to the bottom of the nut inside the third fixing tube, the screw is located in the third fixing ring, the outer wall of the third fixing ring is provided with a third external thread, and the inner wall of the top of the third fixing tube is provided with a third internal thread threadably matched with the third external thread.
[0010] Furthermore, the second fixing tube is provided with a third bolt for fixing the second fixing tube to the first fixing tube.
[0011] Compared with the prior art, the utility model has the following beneficial effects:
[0012] The utility model prevents the screw rod above the nut from being directly exposed to the air through the first fixing tube and the second fixing tube, thereby slowing down the rusting of the screw rod above the nut and reducing the entry of external dust between the screw rod and the nut, thereby protecting the screw rod above the nut; and fixing the sleeve with the vertical rod can reduce the displacement of the nut and the screw rod, thereby reducing the friction between the screw rod and the vertical rod, and protecting the thread on the screw rod inside the vertical rod. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic diagram of the structure of the utility model;
[0014] Figure 2 for Figure 1 A schematic diagram of the front view structure of
[0015] The names of the components in the figure are: 1. screw; 2. nut; 3. first fixing tube; 4. second fixing tube; 5. support plate; 6. first fixing ring; 7. third bolt; 8. second fixing ring; 9. third fixing ring; 10. third fixing tube; 11. second bolt; 12. fourth fixing tube; 13. fixing plate; 14. sleeve; 15. first bolt. DETAILED DESCRIPTION
[0016] The present invention is further described below through specific embodiments in conjunction with the accompanying drawings, but the present invention is not limited thereto. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
[0017] The height adjustment device for a cast-in-place box beam support described in this embodiment is as follows: Figure 1 and Figure 2 As shown, it includes a supporting body, which includes a vertically arranged screw rod 1, a supporting plate 5 fixed on the top of the screw rod 1, the screw rod 1 and the supporting plate 5 are welded, a nut 2 is arranged on the screw rod 1, the outer diameter of the bracket upright is smaller than the outer diameter of the nut 2, or a fixing block is horizontally fixed on the outer side of the nut 2 to prevent the nut 2 from entering the upright of the bracket, and the screw rod 1, the nut 2 and the supporting plate 5 are the supporting structure used on the existing bowl-hook type bracket.
[0018] The screw rod 1 above the nut 2 is independently sleeved with a first fixing tube 3, and the first fixing tube 3 is independently sleeved with a second fixing tube 4, and the top end of the second fixing tube 4 is fixed to the bottom end of the support plate 5, so that the second fixing tube 4 is located above and outside the first fixing tube 3, so that the second fixing tube 4 can better block dust, and the dust is blocked by the second fixing tube 4 and then deposited and directly falls on the outside of the first fixing tube 3, which can prevent some dust from falling into the first fixing tube 3 due to deposition, and a sleeve 14 is independently arranged below the screw rod 1, and the sleeve 14 is connected from top to bottom, and a first bolt 15 is arranged on the sleeve 14 to fix it to the vertical pole, and a first threaded hole is provided on the side wall of the sleeve 14 to be threadedly matched with the first bolt 15, and the first threaded hole is connected and communicated with the inside of the sleeve 14, and the screw of the first bolt 15 passes through the first threaded hole and is located in the sleeve 14.
[0019] A first fixing ring 6 is fixed to the bottom of the support plate 5 inside the second fixing tube 4, and the diameter of the outer wall of the first fixing ring 6 is consistent with the diameter of the inner wall of the second fixing tube 4. The screw 1 is located on the inner side of the first fixing ring 6, and the outer wall of the first fixing ring 6 is provided with a first external thread, and the inner wall of the top of the second fixing tube 4 is provided with a first internal thread that is threadedly matched with the first external thread. Through the threaded cooperation between the second fixing tube 4 and the first fixing ring 6, the second fixing tube 4 and the support plate 5 are detachably matched, and the second fixing tube 4 can be removed from the bottom of the support plate 5; of course, in some embodiments, the top end of the second fixing tube 4 can also be directly fixed to the bottom of the support plate 5.
[0020] A second fixing ring 8 is fixed to the top of the nut 2 inside the first fixing tube 3, and the screw 1 is located in the second fixing ring 8. The outer wall of the second fixing ring 8 is provided with a second external thread, and the inner wall of the bottom of the first fixing tube 3 is provided with a second internal thread threadedly matched with the second external thread. Through the threaded cooperation of the second fixing ring 8 and the first fixing tube 3, the first fixing tube 3 and the nut 2 are detachably matched, and the first fixing tube 3 can be removed from the nut 2; of course, the bottom end of the first fixing tube 3 can also be directly fixed to the top of the nut 2.
[0021] A third fixing tube 10 is vertically fixed to the bottom of the nut 2, a fourth fixing tube 12 is independently installed in the third fixing tube 10, the screw rod 1 is located in the fourth fixing tube 12, the bottom end of the fourth fixing tube 12 is fixed to the outer side wall of the sleeve 14 through a fixing plate 13, the fixing plate 13 is horizontally arranged, and two fixing plates 13 are arranged, which are symmetrically fixed to the left and right outer sides of the sleeve 14, the first bolt 15 is located at the front or rear side of the sleeve 14, the bottom end of the fourth fixing tube 12 is fixed to the top of the fixing plate 13, and the third fixing tube 10 is provided with a third fixing tube 12 fixing it to the fourth fixing tube 12. Second bolt 11, the side wall of the second bolt 11 is provided with a second threaded hole threadably matched therewith, the screw rod of the second bolt 11 passes through the second threaded hole and presses on the fourth fixing tube 12, thereby fixing the fourth fixing tube 12 and the third fixing tube 10, so that the third fixing tube 10 and the fourth fixing tube 12 connect the nut 2 and the sleeve 14, and because the sleeve 14 is fixed to the vertical pole by the first bolt 15, the third fixing tube 10 and the fourth fixing tube 12 can also support the nut 2, which can reduce the force on the nut 2 and protect the cooperation between the nut 2 and the screw rod 1.
[0022] Of course, in some embodiments, the connection mechanism can also be to replace the fourth fixing tube 12 and the third fixing tube 10 with two vertically arranged support rods, the two support rods are symmetrically distributed with the screw rod 1 as the center, the top of the support rod is fixed to the bottom of the nut 2, and the fixing plate 13 is provided with a through hole for the bottom end of the support rod to pass through, and the fixing plate 13 is provided with a fourth bolt for fixing the support rod in the through hole, that is, the fixing plate 13 is provided with a fourth threaded hole connected to the through hole in the thickness direction, and the fourth bolt and the fourth threaded hole are threadedly matched to fix the support rod in the through hole. The content of this paragraph as a whole constitutes a connection mechanism for connecting the sleeve 14 and the nut 2.
[0023] A third fixing ring 9 is fixed to the bottom of the nut 2 inside the third fixing tube 10, and the diameter of the third fixing ring 9 is smaller than the diameter of the third fixing tube 10. The screw 1 is located in the third fixing ring 9. The outer wall of the third fixing ring 9 is provided with a third external thread, and the inner wall of the top of the third fixing tube 10 is provided with a third internal thread that is threadedly matched with the third external thread. Through the threaded cooperation between the third fixing tube 10 and the third fixing ring 9, the third fixing tube 10 and the nut 2 are detachably matched, and the third fixing tube 10 can be removed from the nut 2.
[0024] The second fixing tube 4 is provided with a third bolt 7 for fixing it to the first fixing tube 3. The side wall of the second fixing tube 4 is provided with a third threaded hole threadedly matched with the screw rod of the third bolt 7. The screw rod of the third bolt 7 passes through the third threaded hole and presses on the first fixing tube 3, thereby fixing the first fixing tube 3 and the second fixing tube 4, so that the first fixing tube 3 and the second fixing tube 4 can also support the support plate 5. Because the nut 2 is placed on the vertical pole, after the first fixing tube 3 and the second fixing tube 4 support the support plate 5, the wear of the threads between the nut 2 and the screw rod 1 can also be reduced.
[0025] Working principle:
[0026] When in use, first insert the sleeve 14 from the top of the vertical pole, so that the sleeve 14 is sleeved on the outside of the top of the vertical pole, and fix the sleeve 14 to the vertical pole through the first bolt 15, and at the same time insert the bottom end of the screw rod 1 into the vertical pole of the bracket, and by rotating the nut 2, the nut 2 is moved up and down on the screw rod 1, so as to adjust the length of the bottom end of the screw rod 1 inserted into the vertical pole of the bracket, and then adjust the height of the support plate 5. Of course, when the nut 2 is rotated, the third bolt 7 and the second bolt 11 are loosened, so that when the nut 2 rotates, the first fixing tube 3 and the third fixing tube 10 will rotate with it, and the third bolt 7 and the second bolt 11 will not hinder the rotation of the first fixing tube 3 and the third fixing tube 10. The second fixing tube 4 can prevent the screw rod 1 above the nut 2 from being exposed to the outside, reduce the screw rod 1 above the nut 2 from being directly exposed to the air, thereby slowing down the rusting of the screw rod 1 above the nut 2, and the first fixing tube 3 and the second fixing tube 4 can prevent external dust from entering between the nut 2 and the screw rod 1, and can protect the screw rod 1 above the nut 2, so that the cooperation between the nut 2 and the screw rod 1 is smoother; and the nut 2 and the sleeve 14 are connected by the third fixing tube 10 and the second bolt 11, and the sleeve 14 is fixed to the vertical pole, so that the displacement of the nut 2 can be reduced to a certain extent, thereby reducing the displacement of the screw rod 1 in the vertical pole, reducing the contact and friction between the screw rod 1 and the vertical pole, and protecting the thread on the screw rod 1 in the vertical pole.
Claims
1. A height adjustment device for a cast-in-place box beam support, comprising a supporting body, the supporting body comprising a vertically arranged screw rod (1), a supporting plate (5) fixed to the top of the screw rod (1), a nut (2) arranged on the screw rod (1), characterized in that: A first fixing tube (3) is independently sleeved on the screw rod (1) above the nut (2), a second fixing tube (4) is independently sleeved on the first fixing tube (3), the top end of the second fixing tube (4) is fixed to the bottom of the support plate (5), a sleeve (14) is independently arranged below the screw rod (1), a first bolt (15) is arranged on the sleeve (14) for fixing it to the vertical pole, and the sleeve (14) is connected to the nut (2) through a connecting mechanism.
2. The height adjustment device for cast-in-place box beam support according to claim 1 is characterized in that: A first fixing ring (6) is fixed to the bottom of the support plate (5) inside the second fixing tube (4), the screw rod (1) is located inside the first fixing ring (6), the outer wall of the first fixing ring (6) is provided with a first external thread, and the inner wall of the top of the second fixing tube (4) is provided with a first internal thread that is threadably matched with the first external thread.
3. The height adjustment device for cast-in-place box beam support according to claim 2 is characterized in that: A second fixing ring (8) is fixed to the top of the nut (2) inside the first fixing tube (3), the screw rod (1) is located inside the second fixing ring (8), the outer wall of the second fixing ring (8) is provided with a second external thread, and the inner wall of the bottom of the first fixing tube (3) is provided with a second internal thread that is threadably matched with the second external thread.
4. The height adjustment device for cast-in-place box beam support according to claim 3 is characterized in that: The connection mechanism comprises a third fixing tube (10) vertically fixedly sleeved on the bottom of the nut (2), a fourth fixing tube (12) independently inserted into the third fixing tube (10), the screw rod (1) is located in the fourth fixing tube (12), the bottom end of the fourth fixing tube (12) is fixed to the outer wall of the sleeve (14) through a fixing plate (13), and a second bolt (11) is provided on the third fixing tube (10) for fixing it to the fourth fixing tube (12).
5. The height adjustment device for cast-in-place box beam support according to claim 4 is characterized in that: A third fixing ring (9) is fixed to the bottom of the nut (2) inside the third fixing tube (10), the screw rod (1) is located inside the third fixing ring (9), the outer wall of the third fixing ring (9) is provided with a third external thread, and the inner wall of the top of the third fixing tube (10) is provided with a third internal thread that is threadably matched with the third external thread.
6. The height adjustment device for cast-in-place box beam support according to claim 5, characterized in that: The second fixing tube (4) is provided with a third bolt (7) for fixing the second fixing tube (4) to the first fixing tube (3).