Unbonded prestressed steel strand pulling and lubricating device

Abstract

The utility model discloses an unbonded prestressed steel strand penetrating and lubricating device, which belongs to the technical field of nuclear power station construction and comprises a box body, a spraying component and a lubricating guide pipe. The lubricating guide pipe is horizontally fixed in the box body, the upper side is provided with a long-strip-shaped hole penetrating through the upper pipe wall, and the lower side is provided with a plurality of liquid leakage holes penetrating through the lower pipe wall. The spraying part is fixed in the box body, and the box body is provided with a lubricating medium inlet connected with the spraying part; the spraying part is located above the lubricating guide pipe and sprays a lubricating medium to the lubricating guide pipe; the steel strand with the sheath rotatably penetrates through the lubricating guide pipe under the action of a strand pulling machine, and the surface of the steel strand is stained with the sprayed lubricating medium. The lubricating device has the advantages of good lubricating effect, high lubricating medium utilization rate and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of nuclear power plant construction, and relates to a steel strand bundle threading auxiliary device, and in particular to a non-bonded prestressed steel strand bundle threading lubrication device. Background Technology

[0002] In nuclear power plant construction, unbonded prestressed systems are mainly used for the reinforcement and optimization of concrete structures. This system uses prestressed tendons (usually high-strength steel strands) to enhance the bearing capacity and seismic performance of concrete structures. In the building structure of nuclear power plants, this technology can be used to improve the structural strength and stability of key parts such as containment, reactor base, cooling towers, etc.

[0003] In the unbonded prestressed system, the prestressed tendons use steel strands with grease and sheaths. Since the sheaths and grease can protect and prevent corrosion on the steel strands, the biggest construction difficulty in the process of unbonded prestressed steel strands is to pass through the strands at one time and prevent the sheaths from being damaged during the process. Each steel strand needs to pass through 55 steel strands with sheaths and grease. The more time passes, the more likely it is that the steel strands will fail to pass through the strands, the strands in the strands will get twisted, and the sheaths of the strands will be damaged. Therefore, the surface of the PE sheath of the strands needs to be fully lubricated to reduce the friction between the sheaths and between the sheaths and the steel strands, improve the passing rate of the strands, and ensure that the sheaths are not damaged during the process. Due to the particularity of the construction, there is currently no corresponding equipment in nuclear power plants and related construction fields that can lubricate unbonded prestressed steel strands. If manual lubrication is used, the lubrication effect cannot be guaranteed, and there are problems such as low lubrication efficiency. Contents of utility model

[0004] The utility model provides a non-bonded prestressed steel strand lubrication device to overcome the defects of the prior art.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A non-bonded prestressed steel strand lubrication device is used to lubricate the sheathed steel strand located between the bundle threading machine and the prestressed tube; it includes a box, a spray component and a lubrication duct; the lubrication duct is horizontally fixed in the box, with a long hole penetrating its upper tube wall on the upper side and a plurality of leakage holes penetrating its lower tube wall on the lower side; the spray component is fixed in the box, and the box has a lubrication medium inlet connected to the spray component; the spray component is located above the lubrication duct and sprays the lubrication medium into the lubrication duct; the sheathed steel strand rotates through the lubrication duct under the action of the bundle threading machine, and the surface is stained with the lubrication medium sprayed.

[0007] In order to optimize the above technical solutions, the specific measures taken also include:

[0008] Further, it further includes a circulation pipe; the bottom of the box body has a lubricating medium outlet; the lubricating medium outlet is connected to the lubricating medium inlet through the circulation pipe, and a circulation pump is provided on the circulation pipe.

[0009] Further, a cover plate capable of being opened is provided on the top of the box body.

[0010] Further, a filter screen is provided at the lubricating medium outlet.

[0011] Further, valves are provided at both the lubricating medium outlet and the lubricating medium inlet.

[0012] Further, the spraying component includes a spray pipe; the spray pipe is horizontally fixed in the box body and is connected to the lubricating medium inlet; several spray holes penetrating the lower pipe wall are provided on the lower side of the spray pipe; the setting range of the several spray holes matches the opening range of the long strip holes of the lubricating conduit.

[0013] Further, the spraying component further includes a connecting pipe; the spray pipe is connected to the lubricating medium inlet through the connecting pipe.

[0014] Further, on the lubricating conduit, the setting range of the liquid leakage holes is larger than the opening range of the long strip holes.

[0015] Further, it further includes a scale; the scale is vertically fixed in the box body; the scale has a bent section recessed towards one side; the upper end of the bent section is lower than the lubricating conduit, and the lower end is higher than the height of the lowest amount of lubricating medium that can circulate at the bottom of the box body; scales are provided on the bent section.

[0016] Further, the box body is an L-shaped box body, the bottom of the box body is narrower than its middle and upper parts, and the lubricating conduit is arranged in the middle of the box body.

[0017] The beneficial effects of the present utility model are as follows: The present utility model provides a non-bonded prestressed steel strand threading lubrication device, which can fully lubricate the surface of the sheath of the steel strand under the action of a threading machine, reduce the friction between the sheaths and between the sheath and the prestressed pipe, so that the steel strand with a sheath can smoothly penetrate into the prestressed pipe. Specifically, this device uses a lubricating conduit to lubricate the rotating steel strand with a sheath. Under the spraying of the spraying component, the lubricating medium flows in from the long strip holes on the upper side of the lubricating conduit and then flows out from several liquid leakage holes on the lower side. During this process, the surface of the sheath is fully lubricated. In addition, this device also recirculates the flowing lubricating medium back to the spraying component through the setting of a circulation pipe and a circulation pump, so that the lubricating medium is fully utilized.

[0018] The present utility model has the advantages of good lubrication effect and high utilization rate of lubricating medium. Description of the Drawings

[0019] Figure 1It is a three-dimensional structural schematic diagram of a lubricating device for unbonded prestressed steel strand threading.

[0020] Figure 2 It is an external front view structural schematic diagram of a lubricating device for unbonded prestressed steel strand threading (excluding the circulation pipe and circulation pump).

[0021] Figure 3 It is a front view semi-sectional view of the lubricating duct.

[0022] Figure 4 It is a front view structural schematic diagram of the scale. Specific embodiments

[0023] The following will describe the specific embodiments of the present invention with reference to the accompanying drawings.

[0024] The present invention provides a lubricating device for unbonded prestressed steel strand threading, which is arranged between the threading machine and the prestressed pipe and is used to lubricate the sheathed steel strand located between the threading machine and the prestressed pipe.

[0025] As Figure 1 and 2 shown, the device includes a box body 1, a spraying component, and a lubricating duct 3. The lubricating duct 3 is horizontally fixed in the box body 1, and both ends penetrate through the box body 1. As Figure 3 shown, the upper side of the lubricating duct 3 has a long hole 31 penetrating its upper pipe wall, and the lower side has several liquid leakage holes 32 penetrating its lower pipe wall. The spraying component is fixed in the box body 1. The box body 1 has a lubricating medium inlet 11 connected to the spraying component, and the lubricating medium flows into the spraying component from the lubricating medium inlet 11. The spraying component is located above the lubricating duct 3 and sprays the lubricating medium onto the lubricating duct 3. The sheathed steel strand passes through the lubricating duct 3 under the action of the threading machine and rotates during the passing process, so that the lubricating medium sprayed thereon adheres to its surface to achieve the lubrication purpose.

[0026] In a specific embodiment, the spraying component includes a spraying pipe 2. The spraying pipe 2 is horizontally fixed in the box body 1 and is connected to the lubricating medium inlet 11. The lower side of the spraying pipe 2 has several spraying holes 21 penetrating its lower pipe wall. The setting range of the several spraying holes 21 matches the opening range of the long hole 31 of the lubricating duct 3 to fully lubricate the sheath therein. The spraying component also includes a connecting pipe. The spraying pipe 2 is connected to the lubricating medium inlet 11 through the connecting pipe.

[0027] On the lubricating duct 3, the setting range of the liquid leakage holes 32 is larger than the opening range of the long hole 31, so that the sheath therein can be well lubricated.

[0028] Both the spraying component and the lubricating duct 3 are made of iron. The inner wall of the lubricating duct 3 needs to be polished smoothly to avoid scratching the sheath.

[0029] The device further includes a circulation pipe 41. The bottom of the box body 1 has a lubricating medium outlet 12. The lubricating medium outlet 12 is connected to the lubricating medium inlet 11 through the circulation pipe 41, and a circulation pump 42 is provided on the circulation pipe 41. The lubricating medium under spraying falls to the bottom of the box body 1 and re-enters the spraying component through the circulation pump 42 via the circulation pipe 41 for spraying again. When it is first used or the circulating lubricating medium is insufficient, the lubricating medium can be directly added into the box body 1. Specifically, the circulation pump 42 is a gear type self-priming pump.

[0030] The top of the box body 1 is provided with a cover plate 13 that can be opened for adding lubricating medium. Specifically, the cover plate 13 adopts an asymmetric folding capping structure and is fixed on the box body 1 through four latches. When adding lubricating medium, only one side needs to be removed to open it. After adding the lubricating medium, the cover plate 13 is sealed again.

[0031] A filter screen 5 is provided at the lubricating medium outlet 12 for filtering impurities such as skin debris falling from the sheath to avoid clogging the valve, the circulation pipe 41, and the circulation pump 42.

[0032] Valves are provided at both the lubricating medium outlet 12 and the lubricating medium inlet 11 to control the inflow and outflow of the lubricating medium. Specifically, the valve is a ball valve.

[0033] The device further includes a scale 6. The scale 6 is vertically fixed inside the box body 1. As Figure 4 shown, the scale 6 has a bent section 61 that is recessed towards one side. The upper end of the bent section 61 is lower than the lubricating conduit 3, and the lower end is higher than the height of the lowest amount of lubricating medium that can circulate at the bottom of the box body 1. That is, this bent section 61 represents the maximum storage amount and the minimum storage amount of the lubricating medium in the box body 1. The maximum storage amount of the lubricating medium in the box body 1 means that the lubricating medium cannot be higher than the lubricating conduit 3 to avoid wasting the lubricating medium and at the same time prevent flooding the lubricating conduit 3 resulting in over-lubrication of the sheath. The minimum storage amount of the lubricating medium in the box body 1 means that the lubricating medium needs to circulate between the lubricating medium outlet 12 and the spraying component. Therefore, the storage amount of the lubricating medium in the box body 1 needs to at least meet the circulation requirements. The scale 6 can measure the remaining amount of the lubricating medium and control the usage amount of the lubricating medium. The bent section 61 has graduations. The scale 6 is made of stainless steel.

[0034] The box body 1 is an L-shaped box body. The bottom of the box body 1 is narrower than its upper and middle parts, and the lubricating conduit 3 is arranged in the middle of the box body 1. The shape of this box body 1 matches the shape of the strand threading machine and can be installed on the strand threading machine.

[0035] The usage method of the unbonded prestressed steel strand threading lubrication device of the present utility model is as follows: Fix the box body 1 on the threading machine. Open the cover plate 13 to introduce the lubricating medium into the box body 1, and make the liquid level within the range of the bent section 61 of the scale 6. Open the valves of the lubricating medium outlet 12 and the lubricating medium inlet 11 to connect the circulation pipe 41 with the box body 1 to form a circulation loop. Start the circulation pump 42 to pump the lubricating medium in the box body 1 to the spraying component, and spray it downward through the spray pipe 2 into the lubricating conduit 3. At the same time, the steel strand with a sheath rotates through the lubricating conduit 3 under the action of the threading machine. During the passing process, the surface of the sheath is evenly lubricated, and the lubricated steel strand with a sheath is pushed into the prestressed pipe. The remaining lubricating medium flows into the bottom of the box body 1 from the liquid leakage hole 32 on the lower side of the lubricating conduit 3 for recycling. During the threading process, pay attention to the remaining amount of the lubricating medium in the box body 1 and control it within the bent section 61 of the scale 6 to ensure the smooth circulation of the lubricating medium.

[0036] It should be noted that the terms such as "upper", "lower", "left", "right", "front", "rear", etc. cited in the present utility model are only for the convenience of clear narration, rather than used to limit the scope of implementation of the present utility model. The change or adjustment of their relative relationship, without substantial change in the technical content, should also be regarded as the scope of implementation of the present utility model.

[0037] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A non-bonded prestressed steel strand lubrication device, used for lubricating the sheathed steel strand located between the bundle threading machine and the prestressed pipe, characterized in that: It includes a box body, a spray component and a lubrication duct; The lubrication conduit is fixed horizontally in the box body, and has a long hole penetrating the upper tube wall on the upper side, and a plurality of leakage holes penetrating the lower tube wall on the lower side; The spray component is fixed in the box body, and the box body has a lubricating medium inlet connected to the spray component; The spray component is located above the lubrication duct and sprays the lubrication medium into the lubrication duct; the sheathed steel strand rotates through the lubrication duct under the action of the bundle threading machine, and the surface is stained with the sprayed lubrication medium.

2. The unbonded prestressed steel strand lubrication device according to claim 1 is characterized in that: Also includes a circulation tube; The bottom of the box body is provided with a lubricating medium outlet; The lubricating medium outlet is connected to the lubricating medium inlet through a circulation pipe, and a circulation pump is arranged on the circulation pipe.

3. The unbonded prestressed steel strand lubrication device according to claim 2 is characterized in that: The top of the box body is provided with an openable cover.

4. The unbonded prestressed steel strand lubrication device according to claim 2 is characterized in that: The lubricating medium outlet is provided with a filter.

5. The unbonded prestressed steel strand lubrication device according to claim 2 is characterized in that: The lubricating medium outlet and the lubricating medium inlet are both provided with valves.

6. The unbonded prestressed steel strand lubrication device according to claim 1 is characterized in that: The spray component includes a spray pipe; The spray pipe is horizontally fixed in the box and connected to the lubricating medium inlet; The lower side of the spray pipe is provided with a plurality of spray holes penetrating the lower pipe wall thereof; The setting range of the plurality of spray holes matches the opening range of the long strip hole of the lubrication duct.

7. The unbonded prestressed steel strand lubrication device according to claim 6 is characterized in that: The spray component also includes a connecting pipe; The spray pipe is connected to the lubricating medium inlet through a connecting pipe.

8. The unbonded prestressed steel strand lubrication device according to claim 1 is characterized in that: On the lubricating conduit, the setting range of the leakage hole is larger than the opening range of the long hole.

9. The unbonded prestressed steel strand lubrication device according to claim 1 is characterized in that: Also includes rulers; The ruler is fixed vertically in the box; The scale has a bent section that is concave toward one side; the upper end of the bent section is lower than the lubrication conduit, and the lower end is higher than the height of the minimum amount of lubrication medium that can circulate at the bottom of the box; There are scales on the bending section.

10. The unbonded prestressed steel strand lubrication device according to claim 1, characterized in that: The box body is an L-shaped box body, the bottom of the box body is narrower than the upper part thereof, and the lubrication duct is arranged in the middle part of the box body.

Images