Track device for pushing internally-penetrating steel pipe

Abstract

The utility model belongs to the technical field of pipeline engineering, and particularly relates to a track device for propelling an internally-penetrating steel pipe, which is applied to construction of urban underground water pipelines. The concrete sleeve is used for providing protection and support for the internally-penetrating steel pipe, pipe jacking construction is carried out firstly, then the internally-penetrating steel pipe is laid, however, in the laying process of the internally-penetrating steel pipe, the internally-penetrating steel pipe serves as a water diversion pressure pipeline, the requirements for installation, welding, corrosion prevention and the like are high, and especially for a long internally-penetrating steel pipe, the construction cost is low. Technical problems exist in a traditional laying device and method. The utility model provides a track device for pushing an internally-penetrating steel pipe, which improves the laying accuracy and firmness of the internally-penetrating steel pipe and improves the laying quality and efficiency, and the track device comprises a sliding unit and a track, two parallel rails are arranged on the inner bottom surface of the concrete sleeve in the axial direction of the concrete sleeve; a plurality of sliding units are arranged between the two rails in the length direction of the rails and used for enabling the internally-penetrating steel pipes to move in the rail direction.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipeline engineering, and specifically relates to a track device for propelling an inner-penetrating steel pipe, which is applied in the construction of urban underground water pipelines. Background Art

[0002] With the development of urbanization in the country, urban water diversion is increasingly showing an upward trend, and the number of water pipelines built in water diversion projects is also gradually increasing. The jacking construction method has become more and more popular because it does not require surface excavation. When crossing a road during jacking construction, considering that the road is always open during the jacking construction, the upper load continues to exist and is variable, most of them adopt the method of placing an inner steel pipe in the concrete casing to deal with it. The role of the concrete casing is to provide protection and support for the inner steel pipe. The jacking construction is carried out first, and then the inner steel pipe is laid after the concrete casing is deployed. However, during the laying process of the inner steel pipe, the inner steel pipe, as a water diversion pressure pipe, has high requirements for installation, welding, and corrosion protection. Especially for longer inner steel pipes, the traditional laying devices and methods have the following technical problems:

[0003] 1. It is impossible to ensure that the inner steel pipe is accurately positioned in the concrete casing;

[0004] 2. In the process of laying inner steel pipes, traditional devices rely on pulley brackets and other heavy equipment to match each other, resulting in limited laying methods, slow laying speed and low efficiency;

[0005] 3. During the laying process, the outer wall of the inner steel pipe is prone to collide with the concrete casing and other equipment, which may damage the anti-corrosion layer of the outer wall of the inner steel pipe;

[0006] 4. The laying process is too complicated, the manpower investment cost is high, and it is difficult to promote and popularize. Utility Model Content

[0007] In view of this, the utility model provides a track device for advancing the inner-penetrating steel pipe, which improves the accuracy and firmness of laying the inner-penetrating steel pipe, and improves the laying quality and efficiency. The track device includes a sliding unit and a track;

[0008] Two mutually parallel tracks are arranged on the inner bottom surface of the concrete casing along its axial direction;

[0009] A plurality of sliding units are arranged between the two rails along the length direction of the rails, and are used to make the inner steel pipe move along the direction of the rails.

[0010] Preferably, the sliding unit comprises a support shaft and a sliding bearing, and the sliding bearings are mounted on both axial ends of the support shaft.

[0011] The inner ring of the sliding bearing is fixedly connected to the support shaft.

[0012] The two ends of the support shaft extend out of the sliding bearings at the corresponding ends and overlap on the top end surface of the track at the corresponding side.

[0013] Preferably, the track is connected to the concrete casing via a fastening unit;

[0014] The fastening unit includes a plurality of expansion bolts;

[0015] The expansion bolts are arranged on the concrete sleeves on both sides of the track in the transverse direction and are used to limit the track;

[0016] The nut of the expansion bolt is fixed to the rail by welding.

[0017] Preferably, the track is connected to the concrete casing via a fastening unit;

[0018] The fastening unit includes a plurality of expansion bolts and gaskets;

[0019] The gasket is arranged at the bottom of the track and is fixedly connected thereto;

[0020] The gasket is provided with a through hole or a threaded hole, and the gasket is fixed to the concrete casing by a fastener.

[0021] Preferably, the support shaft is a steel bar;

[0022] The track is a channel steel.

[0023] Preferably, a plurality of the tracks are butted end to end.

[0024] Beneficial effects:

[0025] (i) Two parallel tracks are arranged on the inner bottom surface of the concrete casing along its axial direction, and a number of sliding units parallel to each other and perpendicular to the tracks are arranged between the two tracks to ensure the accurate and stable pushing direction of the inner steel pipe.

[0026] (ii) The gravity of the inner steel pipe acts on the track through the sliding unit, and the track is connected to the concrete casing through the fastening unit, which further improves the stability of the inner steel pipe and the track, achieving accurate and stable installation and positioning of the inner steel pipe and improving the construction quality.

[0027] (III) Several expansion bolts of the fastening unit are distributed on both sides of the track to limit the track. At the same time, the nuts on the expansion bolts are fixed to the track by welding to increase the stability of the track. On the other hand, a gasket is provided on one side of the track, and a through hole or a threaded hole is provided on the gasket, which cooperates with the expansion bolts to provide another technical possibility for track reinforcement.

[0028] (IV) The support shafts and sliding bearings used in the track device are construction parts that are easily available in the market or on the construction site. Combined with the welding process, the track device can be installed and laid simply and quickly.

[0029] (V) Wrap the outer ring surface of the sliding bearing with waterproof tape to prevent the rolling of the sliding bearing from damaging the anti-corrosion layer of the inner steel pipe. In addition, apply lubricating oil to the sliding bearing to reduce the friction between the inner steel pipe and the sliding bearing, thereby improving the efficiency of the inner steel pipe installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the position relationship between the track device of the utility model and the concrete casing and the inner steel pipe;

[0031] Figure 2 This is a schematic diagram of the position relationship of the track device of the utility model when viewed from above;

[0032] Among them, 1-inner steel pipe, 2-concrete casing, 3-track, 4-support shaft, 5-sliding bearing, 6-expansion bolt. DETAILED DESCRIPTION

[0033] The utility model is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0034] like Figure 1-2 As shown, a track device for propelling an inner-penetrating steel pipe is used to transport the inner-penetrating steel pipe 1 into a concrete casing 2, which includes a fastening unit, a sliding unit and a track 3. Two parallel tracks 3 are arranged on the bottom surface of the inner wall of the concrete casing 2 along its axial direction; the track 3 is connected to the concrete casing 2 through the fastening unit; a plurality of sliding units are arranged between the two tracks 3 along the length direction of the track 3, and the sliding units are parallel to each other, so as to make the inner-penetrating steel pipe 1 move along the direction of the track 3.

[0035] As an example, the distance between the two rails 3 is set to 400 mm.

[0036] As an example, the channel steel of the track 3 is 50*50mm in specification, which can be purchased from the market or obtained from the construction site or on-site, making the track device more feasible for application.

[0037] The sliding unit includes a support shaft 4 and a sliding bearing 5. The same type of sliding bearings 5 ​​are mounted on both axial ends of the support shaft 4. The sliding bearing 5 includes an inner ring and an outer ring. The inner ring is welded and fixed to the support shaft 4 to ensure that the sliding bearing 5 is firmly installed. The support shaft 4 is a steel bar, and its two ends pass through the sliding bearings 5 ​​at the corresponding ends and overlap on the top end surface of the track 3, and are fixed to the track 3 using a welding machine process. At this time, the sliding bearing 5 is located between the two tracks 3, that is, the sliding bearing 5 is fixed on the support shaft 4 between the two tracks 3. At this time, the top surfaces of the two sliding bearings 5 ​​of the same support shaft 4 are at the same elevation (the elevation is equivalent to the altitude), and the inner steel pipe 1 is supported on the sliding bearing 5 and can roll on the sliding bearing 5 and cooperate with the sliding bearing 5 in rolling (that is, during the process of pushing the inner steel pipe 1, the outer ring of the sliding bearing 5 rotates).

[0038] As an example, the specification of the sliding bearing 5 is 80mm in outer diameter and 20mm in thickness. The outer ring surface of the sliding bearing is wrapped with waterproof tape to prevent the rolling of the sliding bearing from damaging the anti-corrosion layer of the inner steel pipe, and lubricating oil is applied between the inner and outer rings of the sliding bearing to reduce the friction between the sliding bearing and the inner steel pipe 1, thereby improving the laying efficiency of the inner steel pipe.

[0039] As an example, the fastening unit includes a gasket and an expansion bolt 6. The gasket is placed at the bottom of the track 3 to adjust the track height to ensure that the top surfaces of the sliding bearings 5 ​​on both sides are at the same elevation. The gasket and the track are welded. A through hole or a threaded hole (such as Figure 2 As shown, the width of the gasket is greater than the width of the track 3, and through holes or threaded holes are provided on the parts of the gasket extending out of the track 3 on both sides of the lateral direction. The gasket is fixed to the concrete casing 2 by expansion bolts 6 or other fasteners, and then the track 3 is firmly fixed to the inner wall of the concrete casing 2, ensuring that the inner steel pipe 1 remains accurately positioned during the process of being pushed into the concrete casing 2, thereby further improving the stability of the entire track device.

[0040] As an example, the thickness of the gasket is selected based on achieving the top surface of the sliding bearing 5 at the same elevation.

[0041] As an example, the fastening unit only includes expansion bolts 6 (i.e., in this example, no gasket is provided), and expansion bolts 6 are provided on the concrete casing 2 on both sides of the track 3 in the horizontal direction, which are used to limit the track 3 and prevent the track 3 from deviating from the pushing direction of the inner steel pipe 1 or the two tracks 3 from being parallel, thereby playing a role in fine-tuning the direction of the track 3. After the nut of the expansion bolt 6 is welded to the track 3, the nut and the expansion bolt 6 are welded together. At this time, the nut, the expansion bolt 6 and the track 3 are formed into a whole by welding, thereby further achieving the purpose of increasing the firmness between the track 3 and the inner wall of the concrete casing 2.

[0042] As an example, since the concrete casing 2 has a certain length, the track device can meet the use requirements of concrete casings 2 of different lengths by connecting multiple tracks 3 end to end. In this case, the fastening unit can be set in the middle section of a single track 3 or at the joint of two tracks 3, and the purpose of the setting is to fine-tune the direction of the track 3 and enhance the firmness between the track 3 and the inner wall of the concrete casing 2.

[0043] As an example, the track device is laid out using the following construction steps:

[0044] Step 1: Lay two rails 3 above the bottom inner wall of the concrete casing 2, ensure that the two rails 3 are at the same horizontal height, and fix the rails 3 to the inner wall of the concrete casing 2 through a fastening unit;

[0045] During the installation of the rails 3 , a level ruler is used to measure the heights of the two rails 3 , and the two rails 3 are kept on the same horizontal plane as much as possible. After the rails 3 are basically positioned, the rails 3 are fixed to the inner wall of the concrete casing 2 using expansion bolts 6 .

[0046] After track 3 is installed, clean the welding slag and weld nodules by grinding.

[0047] Step 2: Install sliding bearings 5 ​​on both sides of the support shaft 4 at equal distances from its end points, ensuring that the spacing between the sliding bearings 5 ​​is smaller than the spacing between the rails 3; wrap the outer ring surface with waterproof tape to prevent the sliding bearings 5 ​​from rolling and damaging the anti-corrosion layer of the inner steel pipe 1;

[0048] Step 3, weld the support shaft 4 with the installed sliding bearing 5 to the two rails 3; the spacing between the support shafts 4 is not less than 1200mm; ensure that the support shafts 4 are parallel to each other, and ensure that the gravity of the inner steel pipe 1 acts on the rail 3 through the sliding bearing 5;

[0049] Since the horizontal friction resistance generated by the rotation of the sliding bearing 5 is much smaller than the sliding friction resistance, the inner steel pipe 1 can be pushed to the designated position in the concrete casing 2 by using the power provided by the crane and assisted by manual labor.

[0050] When the track device is pushing the inner steel pipe 1, it needs to be assisted by limited small mechanical equipment, which is different from the traditional method that relies on large equipment. That is, a directional pulley is set at the hole, the vertical direction of the crane traction wire rope is converted to the horizontal direction, and the hook is hung on the end of the inner steel pipe 1. After all preparations are completed, the crane is started for traction (the crane traction only occurs at the beginning of the construction. After the crane stops, the inner steel pipe 1 is slowly pushed along the track 3 to the specified position in the concrete casing 2 by manual labor); assisting manual labor for pushing and direction control, this method can be pulled without hydraulic jacking or winch, achieving the purpose of saving costs, reducing equipment, and environmentally friendly construction.

[0051] The length of the inner steel pipe 1 is 6m, the length and thickness are 1219*10mm, and the unit weight is 296kg / m.

[0052] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention.

Claims

1. A track device for propelling an inner-penetrating steel pipe, used for conveying the inner-penetrating steel pipe (1) into a concrete casing (2), characterized in that: It includes a sliding unit and a track (3); Two mutually parallel tracks (3) are arranged on the inner bottom surface of the concrete casing (2) along its axial direction; A plurality of sliding units are provided between the two rails (3) along the length direction of the rails (3) for moving the inner steel pipe (1) along the direction of the rails (3); The sliding unit comprises a support shaft (4) and a sliding bearing (5), wherein the sliding bearings (5) are mounted on both axial ends of the support shaft (4), the inner ring of the sliding bearing (5) is fixedly connected to the support shaft (4), and the sliding bearings (5) at the corresponding ends of the two ends of the support shaft (4) are extended and overlapped on the top end surface of the track (3) on the corresponding side.

2. A track device for propelling a steel pipe according to claim 1, characterized in that: The track (3) is connected to the concrete casing (2) via a fastening unit; The fastening unit comprises a plurality of expansion bolts (6); The expansion bolts (6) are arranged on the concrete sleeves (2) on both sides of the track (3) in the transverse direction and are used to limit the track (3); The nut of the expansion bolt (6) and the rail (3) are fixed by welding.

3. A track device for propelling a steel pipe according to claim 1, characterized in that: The track (3) is connected to the concrete casing (2) via a fastening unit; The fastening unit comprises a plurality of expansion bolts (6) and gaskets; The gasket is arranged at the bottom of the track (3) and is fixedly connected thereto; The gasket is provided with a through hole or a threaded hole, and the gasket is fixed to the concrete casing (2) by means of a fastener.

4. A track device for propelling a steel pipe according to claim 1, characterized in that: The support shaft (4) is a steel bar; The track (3) is a channel steel.

5. A track device for propelling a steel pipe according to any one of claims 1 to 4, characterized in that: A plurality of rails (3) are butt-jointed end to end.

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