Prestress releasing and tensioning device and prestress releasing and tensioning system for nuclear island steel strand

Abstract

The utility model discloses a prestress releasing and tensioning device and a prestress releasing and tensioning system for nuclear island steel strands, and particularly relates to the technical field of nuclear power engineering. A base, a release abutting assembly and a release driving piece are arranged. During use, one end of a steel strand sequentially penetrates through the threading hole and the tension releasing channel from the side, away from the tension releasing abutting assembly, of the base, penetrates out of the side, away from the base, of the tension releasing abutting assembly and then is detachably connected with the tension releasing driving piece so as to release the steel strand. When the pre-stress releasing and tensioning device is used, large-tonnage steel strands in a nuclear island plant can be tensioned by the aid of the pre-stress releasing and tensioning device, potential safety hazards such as steel strand breakage caused by included angles, pore sizes and the like of pre-buried pore passages in the tensioning process of the steel strands in the prior art are avoided, and operation safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of nuclear power engineering, in particular to a prestressed tensioning device and a prestressed tensioning system for nuclear island steel strands. Background Art

[0002] During nuclear island construction, prestressed steel strand threading and tensioning operations must be performed within the nuclear island building. After stranding is completed within the nuclear island building, anchors and clips are installed at both ends of the strands to temporarily secure the strands and to support the tensioning forces after the subsequent tensioning operations are completed. According to nuclear island building design requirements, after the strands reach maximum tension, their elongation under maximum tension must be between -5% and 8%.

[0003] However, due to factors such as the angle and diameter of the pre-buried holes used to thread the steel strands, the strands are subjected to uneven force during tensioning, which can easily lead to over-tensioning or strand breakage. To address these issues, a tensioning operation is required, but existing methods are not suitable for large-tonnage strands. Utility Model Content

[0004] The main purpose of the utility model is to propose a prestressed tensioning device and a prestressed tensioning system for nuclear island steel strands, aiming to solve the technical problem that the tensioning operation in the existing technology cannot be carried out on large-tonnage steel strands.

[0005] To achieve the above-mentioned purpose, the present invention proposes a prestressing device for nuclear island steel strands, comprising:

[0006] A base, wherein the base is formed with a threading hole for the steel strand to pass through;

[0007] A sheet-releasing abutting assembly, the sheet-releasing abutting assembly being mounted on the base, the sheet-releasing abutting assembly being formed with a sheet-releasing channel penetrating the sheet-releasing abutting assembly and communicating with the threading hole, and,

[0008] a sheet placing driving member, the sheet placing driving member abutting against a side of the sheet placing abutting assembly facing away from the base;

[0009] One end of the steel strand passes through the threading hole and the stretching channel in sequence from the side of the base away from the stretching abutment assembly, and then passes through the side of the stretching abutment assembly away from the base and is detachably connected to the stretching drive component to stretch the steel strand.

[0010] In one embodiment, the sheet placing and abutting assembly comprises:

[0011] a support, the support being detachably mounted on the base and located on one side of the threading hole; and

[0012] An abutment seat, the abutment seat is mounted on an end of the support away from the base, and the release channel is formed on the abutment seat, and the end of the abutment seat away from the support forms an abutment end;

[0013] The tensioning driving member abuts against the abutting end to cooperate with the abutting seat and tension or release the steel strand.

[0014] In one embodiment, the abutment seat comprises:

[0015] A connecting plate connected to the support, wherein a threading slot is formed on the connecting plate, the threading slot and the threading hole are coaxially arranged and communicate with each other; and

[0016] A partition plate is provided on one side of the threading slot to communicate with the threading slot to form the sheet-releasing channel, and the sheet-releasing driving member abuts against one end of the partition plate away from the connecting plate.

[0017] In one embodiment, there are two partition plates, and the two partition plates are relatively arranged on both sides of the threading groove, and the area between the two partition plates is connected to the threading groove to form the tensioning channel, and the tensioning drive member simultaneously abuts against one end of the two partition plates away from the connecting plate.

[0018] In one embodiment, a first pad is further provided between the connecting plate and the support.

[0019] In one embodiment, the support includes a second pad, a support column and at least two diagonal braces, one end of the support column is connected to the second pad, the second pad is detachably connected to the base, at least two of the diagonal braces are supported on the outer periphery of the support column at intervals along the circumferential direction, and each of the diagonal braces is connected to the second pad.

[0020] In one embodiment, the number of the supports is two, and the two supports are spaced apart and arranged on both sides of the threading hole.

[0021] In one embodiment, bolt holes are formed on the base at intervals, and the bolt holes are bolted to external anchors through bolts.

[0022] In one embodiment, the base and the expansion abutment assembly are both made of steel.

[0023] Based on the same technical concept, in a second aspect, the present invention further proposes a prestressing and tensioning system, which applies the prestressing and tensioning device for nuclear island steel strands described in the first aspect.

[0024] The technical solution of the present invention is to set a base, a tensioning and abutting assembly and a tensioning driving part. When in use, one end of the steel strand is passed through the threading hole and the tensioning channel in sequence from the side of the base away from the tensioning and abutting assembly, and then passed out from the side of the tensioning and abutting assembly away from the base and is detachably connected to the tensioning driving part to tension the steel strand. When in use, the present invention can use the prestressed tensioning device to tension the large-tonnage steel strand inside the nuclear island plant, avoiding the existing hidden dangers of steel strand breakage caused by the angle, aperture size, etc. of the embedded channel during the tensioning process, thereby improving operation safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0026] Figure 1 A schematic structural diagram of the prestressed tensioning device provided by the present invention;

[0027] Figure 2 This is a schematic diagram of the planar structure of the prestressed tensioning device provided by the utility model;

[0028] Figure 3 This is a structural diagram of the prestressed tensioning device provided by the present invention in the initial operating state;

[0029] Figure 4 This is a structural diagram of the prestressed tensioning device provided by the utility model in an operating state;

[0030] Figure 5 This is a schematic diagram of the structure of the prestressed tensioning device provided by the present invention after tensioning;

[0031] Figure 6 This is a structural schematic diagram of an improved embodiment of the prestressed tensioning device exemplified by the present utility model.

[0032] Description of Figure Numbers:

[0033] 100. Base; 110. Threading hole; 200. Posting abutment assembly; 210. Posting channel; 300. Posting drive member; 220. Support; 230. Abutment seat; 231. Connecting plate; 232. Partition plate; 233. Threading slot; 234. First pad; 235. Second pad; 221. Support column; 222. Diagonal brace; 223. External anchor; 400. Guide mechanism; 410. Guide assembly; 411. Connecting rod; 412. Hinge end; 413. Guide end; 414. Mounting slot; 415. Long hole; 416. Pulley; 417. First spring; 418. Second spring; 500. Steel strand.

[0034] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only 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 making creative efforts are within the scope of protection of the present invention.

[0036] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0037] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0038] See also Figures 1 to 6 In one embodiment of the present invention, the prestressing device for the nuclear island steel strand 500 includes:

[0039] The base 100 is formed with a threading hole 110 for the steel strand 500 to pass through;

[0040] The sheet-releasing abutting assembly 200 is mounted on the base 100 , and a sheet-releasing channel 210 is formed on the sheet-releasing abutting assembly 200 , which passes through the sheet-releasing abutting assembly 200 and communicates with the threading hole 110 , and,

[0041] The sheet placing driving member 300 abuts against a side of the sheet placing abutting assembly 200 facing away from the base 100;

[0042] One end of the steel strand 500 passes through the threading hole 110 and the tensioning channel 210 in sequence from the side of the base 100 away from the tensioning abutment assembly 200, and then passes out from the side of the tensioning abutment assembly 200 away from the base 100 and is detachably connected to the tensioning drive member 300 to tension the steel strand 500.

[0043] In this embodiment, by setting a base 100, a tensioning and abutting assembly 200 and a tensioning driving member 300, when in use, one end of the steel strand 500 is allowed to pass through the threading hole 110 and the tensioning channel 210 in sequence from the side of the base 100 away from the tensioning and abutting assembly 200, and then pass through the side of the tensioning and abutting assembly 200 away from the base 100 and be detachably connected to the tensioning driving member 300 to tension the steel strand 500. This allows the utility model to utilize a prestressed tensioning device to tension the large-tonnage steel strand 500 inside the nuclear island plant when in use, avoiding the existing hidden dangers of broken wires of the steel strand 500 caused by the angle and aperture size of the pre-buried channel during the tensioning process of the steel strand 500, thereby improving operational safety.

[0044] It should be particularly and clearly stated that in this embodiment, the exemplary tensioning drive member 300 is a hydraulic drive device used in the prior art for prestressing tensioning operations of the steel strand 500. In this embodiment, it is only applied and its own structure is not improved and designed, so it will not be described one by one here.

[0045] In some embodiments, the abutment assembly 200 includes:

[0046] A support 220 , which is detachably mounted on the base 100 and is located on one side of the threading hole 110 ; and

[0047] The abutment seat 230 is mounted on the end of the support 220 away from the base 100, and the abutment seat 230 is formed with a release channel 210, and the end of the abutment seat 230 away from the support 220 forms an abutment end;

[0048] The tensioning driving member 300 abuts against the abutting end to cooperate with the abutting seat 230 and tension or release the steel strand 500 .

[0049] In this embodiment, by setting a support 220 and an abutment seat 230, the support 220 is installed on the base 100, and the abutment seat 230 is installed on the support 220, so that when in use, the utility model can utilize the cooperation of the set support 220 and the abutment seat 230 to achieve the function of guiding and tensioning the steel strand 500.

[0050] In one embodiment, the abutment seat 230 includes:

[0051] A connecting plate 231 is connected to the support 220 , and a threading slot 233 is formed on the connecting plate 231 , and the threading slot 233 is coaxially arranged with the threading hole 110 and communicates with each other; and

[0052] The partition plate 232 is disposed on one side of the threading slot 233 to communicate with the threading slot 233 to form a sheet-releasing channel 210 . The sheet-releasing driving member 300 abuts against one end of the partition plate 232 away from the connecting plate 231 .

[0053] In this embodiment, a connecting plate 231 and a partition plate 232 are provided to connect the connecting plate 231 to the support 220, and a threading groove 233 is formed on the connecting plate 231, so that the threading groove 233 and one side of the partition plate 232 form a tensioning channel 210, thereby enabling the utility model to guide the steel strand 500 when in use, and also enabling the utility model to provide a more stable support position for the tensioning drive 300 when in use, thereby improving the stability of the steel strand 500 during tensioning.

[0054] In one embodiment, there are two partition plates 232, and the two partition plates 232 are relatively arranged on both sides of the threading groove 233, and the area between the two partition plates 232 is connected to the threading groove 233 to form a tensioning channel 210, and the tensioning drive member 300 simultaneously abuts against one end of the two partition plates 232 away from the connecting plate 231.

[0055] In this embodiment, the number of partition plates 232 is set to two, so that the two partition plates 232 are arranged on both sides of the threading slot 233, thereby enabling the utility model to utilize the set threading slot 233 to achieve the function of improving the abutment stability of the sheet-releasing drive member 300 when in use.

[0056] In one embodiment, a first pad 234 is further disposed between the connecting plate 231 and the support 220 .

[0057] In this embodiment, by arranging a first pad 234 between the connecting plate 231 and the support 220, the utility model can improve the horizontality of the end face of the support 220 when in use, thereby making the utility model more horizontal when in use, and can avoid the partition plate 232 from tilting due to the uneven end face of the support 220, and ultimately causing the tensioning drive member 300 to be at risk of tilting during the tensioning process of the steel strand 500.

[0058] In one embodiment, the support 220 includes a second pad 235, a support column 221 and at least two diagonal struts 222, one end of the support column 221 is connected to the second pad 235, the second pad 235 is detachably connected to the base 100, at least two diagonal struts 222 are supported on the outer periphery of the support column 221 at intervals along the circumferential direction, and each diagonal strut 222 is connected to the second pad 235.

[0059] In this embodiment, by providing a second pad 235, a support column 221 and at least two diagonal braces 222, the utility model can utilize the cooperation of the provided second pad 235 and the at least two diagonal braces 222 and the support column 221 when in use to release the thrust generated by the tensioning drive 300 during the tensioning operation or tensioning operation of the steel strand 500, thereby improving the stability of the overall structure and avoiding damage to the overall structure caused by excessive thrust provided by the tensioning drive 300.

[0060] In some preferred embodiments, there are two supports 220 , which are spaced apart and arranged on both sides of the threading hole 110 .

[0061] In this embodiment, by setting the number of supports 220 to two, the utility model can utilize the two supports 220 to evenly transmit the thrust borne by the tensioning abutment assembly 200 when in use, thereby further improving the stability and overall structural strength of the overall structure.

[0062] In one embodiment, bolt holes are formed on the base 100 at intervals, and the bolt holes are bolted to the external anchors 223 through bolts.

[0063] In this embodiment, by forming bolt holes distributed at intervals on the base 100, the prestressed tensioning device of the present invention can be bolted to the external anchor 223 when in use, thereby ensuring the stability of the present invention when in use.

[0064] In an exemplary embodiment, the base 100 and the deployment abutment assembly 200 are both made of steel.

[0065] Of course, in some exemplary embodiments, see Figure 6In order to prevent the steel strand 500 from shaking or vibrating when the prestressed tensioning device of the present invention is performing tensioning operation on the steel strand 500, a guide mechanism 400 is further provided on both sides of the threading hole 110 during specific implementation. The guide mechanism 400 of the example should include two groups of guide assemblies 410, each group of guide assemblies 410 includes two connecting rods 411, and the two ends of the two connecting rods 411 are respectively a hinge end 412 and a guide end 413, and the hinge end 412 is connected to the base 10 0 hinged, and two connecting rods 411 are arranged opposite each other. The guide ends 413 of the two connecting rods 411 in the same group extend into the threading hole 110, or extend above the threading hole 110. The guide ends 413 are formed with mounting grooves 414. The groove walls of the mounting grooves 414 are formed with elongated holes 415 extending along the extension direction of the corresponding connecting rods 411. A pulley 416 is mounted in the elongated hole 415. A first spring 417 is disposed between the pulley 416 and the bottom wall of the mounting groove 414. A second spring 418 is disposed between the two sets of guide assemblies 410 to facilitate reset between the two sets of guide assemblies 410.

[0066] In this embodiment, through the exemplary setting, the utility model can guide the steel strand 500 when in use, thereby preventing the steel strand 500 from shaking in the threading hole 110.

[0067] Of course, in order to more clearly illustrate the specific release process of the utility model, the specific process is as follows:

[0068] Install the prestressed tensioning device of the present invention example on the anchor. Open the stroke of the tensioning drive component 300 composed of the jack to a certain extent, and install the jack on the stranded wire. The jack continues to open the stroke, and pull the clip out of the threading hole 110, until the clip can be manually lifted. Hold the clip and release the pressure of the jack at the same time to gradually return it, leaving a certain amount of return to allow the stranded wire 500 to retract and drive the clip to lock. Push the clip into the threading hole 110 again, and return the jack to the bottom to complete the initial graded tensioning. Repeat the above process to continue to the next level of tensioning until the force unloading in the stranded wire 500 is completed.

[0069] Based on the same technical concept, in a second aspect, the present invention further proposes a prestressing and tensioning system, which applies the prestressing and tensioning device for the nuclear island steel strand 500 of the first aspect.

[0070] The prestressed tensioning system provided in the embodiments of the present application utilizes the prestressed tensioning device for the nuclear island steel strand 500 described in the aforementioned embodiments, thereby resolving the technical issue of the inability to perform tensioning operations on large-tonnage steel strands 500. Compared to the prior art, the prestressed tensioning system provided in the embodiments of the present application achieves the same beneficial effects as the prestressed tensioning device for the nuclear island steel strand 500 described in the aforementioned embodiments. Other technical features of the prestressed tensioning system are the same as those disclosed in the aforementioned embodiments and are not further detailed here.

[0071] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A prestressing device for nuclear island steel strand, characterized in that: include: A base, wherein the base is formed with a threading hole for the steel strand to pass through; A sheet-releasing abutting assembly, the sheet-releasing abutting assembly being mounted on the base, the sheet-releasing abutting assembly being formed with a sheet-releasing channel penetrating the sheet-releasing abutting assembly and communicating with the threading hole, and, a sheet placing driving member, the sheet placing driving member abutting against a side of the sheet placing abutting assembly facing away from the base; One end of the steel strand passes through the threading hole and the stretching channel in sequence from the side of the base away from the stretching abutment assembly, and then passes through the side of the stretching abutment assembly away from the base and is detachably connected to the stretching drive component to stretch the steel strand.

2. The prestressing device for nuclear island steel strands according to claim 1, characterized in that: The sheet placing and abutting assembly comprises: a support, the support being detachably mounted on the base and located on one side of the threading hole; and An abutment seat, the abutment seat is mounted on an end of the support away from the base, and the release channel is formed on the abutment seat, and the end of the abutment seat away from the support forms an abutment end; The tensioning driving member abuts against the abutting end to cooperate with the abutting seat and tension or release the steel strand.

3. The prestressing device for nuclear island steel strands according to claim 2, characterized in that: The abutment seat comprises: A connecting plate connected to the support, wherein a threading slot is formed on the connecting plate, the threading slot and the threading hole are coaxially arranged and communicate with each other; and A partition plate is provided on one side of the threading slot to communicate with the threading slot to form the sheet-releasing channel, and the sheet-releasing driving member abuts against one end of the partition plate away from the connecting plate.

4. The prestressing tensioning device for nuclear island steel strands according to claim 3, characterized in that: There are two partition plates, which are relatively arranged on both sides of the threading slot, and the area between the two partition plates is connected to the threading slot to form the tensioning channel. The tensioning drive member simultaneously abuts against one end of the two partition plates away from the connecting plate.

5. The prestressing tensioning device for nuclear island steel strands according to claim 3, characterized in that: A first pad is further provided between the connecting plate and the support.

6. The prestressing tensioning device for nuclear island steel strands according to claim 5, characterized in that: The support includes a second pad, a support column and at least two diagonal braces, one end of the support column is connected to the second pad, the second pad is detachably connected to the base, at least two of the diagonal braces are supported on the outer periphery of the support column at intervals along the circumferential direction, and each of the diagonal braces is connected to the second pad.

7. The prestressing tensioning device for nuclear island steel strands according to claim 6, characterized in that: The number of the supports is two, and the two supports are spaced apart and arranged on both sides of the threading hole.

8. The prestressing tensioning device for nuclear island steel strands according to any one of claims 1 to 7, characterized in that: Bolt holes distributed at intervals are formed on the base, and the bolt holes are bolted to external anchors through bolts.

9. The prestressing tensioning device for nuclear island steel strands according to any one of claims 1 to 7, characterized in that: The base and the expansion abutment assembly are both made of steel.

10. A prestressed tensioning system, characterized in that: A prestressing tensioning device for nuclear island steel strands as claimed in any one of claims 1 to 9 is used.

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