Two-section type steel casing

Abstract

The utility model relates to the technical field of steel casings, in particular to a two-section type steel casing which comprises a lower casing body and an upper casing body, the lower casing body and the upper casing body are connected in a staggered and inserted mode, a plurality of sets of plug pin grooves distributed in a circumferential array mode are formed in the staggered and inserted position, and plug pins are transversely connected in the plug pin grooves in an inserted mode. The upper end of the upper protective cylinder is provided with a plug pin, the plug pin is elastically installed on the inner side of the upper protective cylinder, and the upper end of the upper protective cylinder is provided with a traction rope for pulling the plug pin to slide transversely, and the beneficial effects are that through cooperation of the elastically installed plug pin and the traction rope, transverse staggered insertion connection is achieved through elasticity of the spring to the plug pin, and the purpose of fixedly connecting adjacent steel protective cylinders is achieved; and the traction rope is arranged to reach the traction plug pin to transversely slide and extrude the spring, so that the connection position is conveniently disassembled, manual drilling into the pile foundation pit for disassembly is avoided, and the disassembly and assembly convenience is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of steel casings, in particular to a two-section steel casing. Background Art

[0002] In railway and highway roadbed widening construction projects, when widening and reinforcing pile foundations are carried out on existing pile raft structure roadbeds, the design requires that steel casings be buried within the existing embankments.

[0003] The existing steel casing is used to support the pile foundation pit. However, the pile foundation pit at the lower level requires continuous support, while the upper roadbed position does not require continuous support after the construction is completed. Therefore, in order to save costs and achieve recycling, the existing technology usually designs a two-section steel casing, and the steel casings are fixedly connected by rigid connections such as bolts. After the construction is completed, the upper steel casing is disassembled, recycled, and reused.

[0004] However, in the actual dismantling process, since the inner diameter of the pile foundation pit is small and the connection position of the steel casing is located inside the pile foundation pit, it is difficult to drill into it manually to dismantle the connecting parts, resulting in difficulties in dismantling and recycling. Utility Model Content

[0005] The utility model aims to provide a two-section steel casing to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A two-section steel casing, comprising a lower casing and an upper casing, wherein the lower casing and the upper casing are mutually staggered and plugged, and the positions of the staggered plugging are provided with a plurality of groups of latch grooves distributed in a circumferential array, wherein latch grooves are provided with latches which are laterally plugged, and the latches are elastically mounted on the inner side of the upper casing, and a traction rope for pulling the latch to slide laterally is provided at the upper end of the upper casing.

[0008] Preferably, a circular annular protrusion is provided at the lower end of the lower casing, and a clamping groove is provided at the lower end of the upper casing. The circular annular protrusion is inserted into the clamping groove in a staggered manner, and both the circular annular protrusion and the clamping groove are provided with mutually overlapping latch grooves.

[0009] Preferably, a lower frame is fixedly provided at the inner port of the lower end of the upper casing, the latch is laterally slidably inserted in the lower frame, a spring is provided in the inner cavity of the lower frame, and the spring is pressed between the latch and the inner wall of the lower frame.

[0010] Preferably, an upper frame corresponding to the lower frame is provided at the upper end port position of the upper casing, a laterally driven slider is provided on the upper frame, one end of the traction rope is fixed on the latch, and the other end of the traction rope is fixed on the slider.

[0011] Preferably, a sliding transverse groove is transversely arranged on the upper frame, and a side groove is arranged on the side wall of the sliding transverse groove. The slider is slidably installed in the sliding transverse groove, and a side strip that slides and fits the side groove is arranged on the side wall of the slider.

[0012] Preferably, a transverse screw hole is transversely arranged on the left side of the sliding transverse groove, a screw rod is threadedly installed in the transverse screw hole, one end of the screw rod is bearing-mounted on the slider, and the other end of the screw rod extends to the outside of the transverse screw hole.

[0013] Preferably, the compressed lateral length of the spring is greater than the length of the latch.

[0014] Preferably, the lower frame and the upper frame are respectively provided with a first steering wheel and a second steering wheel, and the traction rope is smoothly bent and extended along the first steering wheel and the second steering wheel.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The utility model arranges the elastically installed latch and the pulling rope to cooperate, thereby utilizing the elastic force of the spring on the latch to realize transverse dislocation plug-in, so as to achieve the purpose of fixed connection between adjacent steel casings; by arranging the pulling rope to reach the pulling latch to slide transversely and squeeze the spring, convenient disassembly of the connection position is realized, and manual drilling into the pile foundation pit for disassembly is avoided, thereby greatly improving the convenience of disassembly and installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 for Figure 1 A magnified view of the structure at center;

[0019] Figure 3 for Figure 1 A magnified view of the structure at B in the middle;

[0020] Figure 4 It is a schematic diagram of the three-dimensional structure of the connection between the latch and the traction rope of the utility model.

[0021] In the figure: 1, lower casing; 2, upper casing; 3, upper frame; 4, latch; 5, traction rope; 6, slider; 7, side bar; 8, screw; 9, slot; 10, circular protrusion; 11, latch slot; 12, lower frame; 13, spring; 14, first steering wheel; 15, transverse screw hole; 16, sliding transverse slot; 17, side slot; 18, second steering wheel. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figures 1 to 4 , the utility model provides a technical solution:

[0024] A two-section steel casing comprises a lower casing 1 and an upper casing 2, the lower casing 1 and the upper casing 2 are mutually staggered and plugged, and a plurality of groups of latch grooves 11 distributed in a circumferential array are arranged at the positions of the staggered plugging, a circular annular protrusion 10 is arranged at the lower end of the lower casing 1, and a clamping groove 9 is arranged at the lower end of the upper casing 2, the circular annular protrusion 10 is staggered and plugged into the clamping groove 9, and the circular annular protrusion 10 and the clamping groove 9 are both provided with mutually overlapping latch grooves 11.

[0025] The insertion and matching of the annular protrusion 10 and the clamping groove 9 realizes the alignment and insertion of the connection positions of the lower casing 1 and the upper casing 2.

[0026] A latch 4 is laterally inserted in the latch groove 11, and the latch 4 is elastically installed on the inner side of the upper casing 2. A lower frame 12 is fixedly provided at the inner port of the lower end of the upper casing 2. The latch 4 is laterally slidably inserted in the lower frame 12. A spring 13 is provided in the inner cavity of the lower frame 12, and the spring 13 is pressed between the latch 4 and the inner wall of the lower frame 12.

[0027] Under the resetting elastic force of the spring 13 , the latch pin 4 is inserted into the latch pin slot 11 , thereby achieving a fixed connection between the lower casing 1 and the upper casing 2 .

[0028] A traction rope 5 for transverse sliding of a traction pin 4 is provided at the upper end of the upper casing 2, an upper frame 3 corresponding to the lower frame 12 is provided at the upper end port position of the upper casing 2, a transversely driven slider 6 is provided on the upper frame 3, one end of the traction rope 5 is fixed on the pin 4, and the other end of the traction rope 5 is fixed on the slider 6, a sliding transverse groove 16 is transversely provided on the upper frame 3, a side groove 17 is provided on the side wall of the sliding transverse groove 16, the slider 6 is slidably installed in the sliding transverse groove 16, and a side strip 7 that slides and fits the side groove 17 is provided on the side wall of the slider 6.

[0029] The lateral pulling force of the latch 4 is controlled by setting a traction rope 5. When disassembling, the traction rope 5 is pulled to make the latch 4 move outward and squeeze the spring 13, so as to achieve the purpose of convenient and quick disassembly. The sliding transverse groove 16 is used to limit the position of the slider 6, thereby limiting the traction direction of the traction rope 5.

[0030] A transverse screw hole 15 is transversely arranged on the left side of the sliding transverse groove 16, and a screw rod 8 is threadedly installed in the transverse screw hole 15. One end of the screw rod 8 is bearing-mounted on the slider 6, and the other end of the screw rod 8 extends to the outside of the transverse screw hole 15. The compressed transverse length of the spring 13 is greater than the length of the pin 4.

[0031] The screw rod 8 rotates in the transverse screw hole 15 to pull the slider 6 to slide transversely. The side strips 7 and the side grooves 17 are arranged to cooperate to prevent the slider 6 from being pulled and rotated by the screw rod 8, so that the slider 6 can maintain smooth transverse sliding.

[0032] A first steering wheel 14 and a second steering wheel 18 are respectively provided on the lower frame 12 and the upper frame 3 , and the traction rope 5 is smoothly bent and extended along the first steering wheel 14 and the second steering wheel 18 .

[0033] The first steering wheel 14 and the second steering wheel 18 are used to achieve smooth bending of the traction rope 5, so that the traction rope 5 extends smoothly to the outside of the upper casing, thereby facilitating operation and avoiding manual entry into the casing for disassembly.

[0034] Working principle: First, the screw rod 8 rotates outward, so that the slider 6 slides and drives the traction rope 5 to pull the pin 4, so that the pin 4 is received in the inner cavity of the lower frame 12, which is convenient for the plug-in cooperation of the annular protrusion 10 and the card slot 9, so as to realize the alignment plug-in of the connection position of the lower casing 1 and the upper casing 2. After docking, the screw rod 8 rotates in the opposite direction, the traction rope 5 is relaxed, and the pin 4 is driven to be plugged into the pin slot 11 under the reset elastic force of the spring 13, so as to realize the fixed connection between the lower casing 1 and the upper casing 2.

[0035] When disassembly is required, the screw rod 8 is rotated again, and the thread of the screw rod 8 in the transverse screw hole 15 rotates, thereby pulling the slider 6 to slide transversely, driving and pulling the traction rope 5, and by setting the cooperation of the side strips 7 and the side grooves 17, the slider 6 is prevented from being pulled and rotated by the screw rod 8, so that the slider 6 maintains a smooth and horizontal sliding, and the pin 4 is disengaged from the pin groove 11 under the drive of the traction rope 5, so that convenient and fast disassembly is achieved.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A two-stage steel casing, characterized in that: The two-section steel casing comprises a lower casing (1) and an upper casing (2), wherein the lower casing (1) and the upper casing (2) are mutually staggered and plugged, and a plurality of groups of latch grooves (11) distributed in a circumferential array are arranged at the positions of the staggered plugging, wherein latches (4) are arranged in the latch grooves (11) and are inserted transversely, wherein the latches (4) are elastically mounted on the inner side of the upper casing (2), and a traction rope (5) for pulling the latches (4) to slide transversely is arranged at the upper end of the upper casing (2).

2. A two-stage steel casing according to claim 1, characterized in that: The lower end of the lower casing (1) is provided with a circular annular protrusion (10), and the lower end of the upper casing (2) is provided with a clamping groove (9). The circular annular protrusion (10) is inserted into the clamping groove (9) in a staggered manner, and the circular annular protrusion (10) and the clamping groove (9) are both provided with mutually overlapping latch grooves (11).

3. A two-stage steel casing according to claim 2, characterized in that: A lower frame (12) is fixedly provided at the inner port at the lower end of the upper protective tube (2), the latch (4) is laterally slidably inserted in the lower frame (12), and a spring (13) is provided in the inner cavity of the lower frame (12), and the spring (13) is pressed between the latch (4) and the inner wall of the lower frame (12).

4. A two-stage steel casing according to claim 3, characterized in that: An upper frame (3) corresponding to the lower frame (12) is arranged at the upper end port of the upper casing (2), a horizontally driven slider (6) is arranged on the upper frame (3), one end of the traction rope (5) is fixed on the latch (4), and the other end of the traction rope (5) is fixed on the slider (6).

5. A two-stage steel casing according to claim 4, characterized in that: The upper frame (3) is laterally provided with a sliding groove (16), the side wall of the sliding groove (16) is provided with a side groove (17), the slider (6) is slidably installed in the sliding groove (16), and the side wall of the slider (6) is provided with a side strip (7) that slidably fits the side groove (17).

6. A two-stage steel casing according to claim 5, characterized in that: A transverse screw hole (15) is transversely arranged on the left side of the sliding transverse groove (16), a screw rod (8) is threadedly installed in the transverse screw hole (15), one end of the screw rod (8) is bearing-mounted on the slider (6), and the other end of the screw rod (8) extends to the outside of the transverse screw hole (15).

7. A two-stage steel casing according to claim 3, characterized in that: The compressed transverse length of the spring (13) is greater than the length of the latch (4).

8. The two-stage steel casing according to claim 3 is characterized in that: The lower frame (12) and the upper frame (3) are respectively provided with a first steering wheel (14) and a second steering wheel (18), and the traction rope (5) is smoothly bent and extended along the first steering wheel (14) and the second steering wheel (18).

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