CN211923565U - Large-radius circumferential horizontal duct prestressed steel strand pulling device - Google Patents
Large-radius circumferential horizontal duct prestressed steel strand pulling device Download PDFInfo
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- CN211923565U CN211923565U CN201922369190.5U CN201922369190U CN211923565U CN 211923565 U CN211923565 U CN 211923565U CN 201922369190 U CN201922369190 U CN 201922369190U CN 211923565 U CN211923565 U CN 211923565U
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Abstract
The utility model discloses a large-radius circumferential horizontal pore prestressed steel strand pulling device, which comprises a first conical sleeve and a second conical sleeve which are in threaded connection with each other, wherein a locking mechanism is detachably connected between the first conical sleeve and the second conical sleeve; the two ends of the guide steel wire rope are respectively positioned at the small-diameter ends of the first conical sleeve and the second conical sleeve; and a jack for accommodating the central wire end of the steel strand to be stranded is also arranged in the conical sleeve II. The utility model discloses it is big, have extravagant steel strand wires's problem to wear to restraint the construction to have the initial degree of difficulty with last steel strand wires to wear to restraint the construction for the steel strand wires of solving the horizontal hoop prestressing force pore canal of nuclear power plant among the prior art, realizes being applicable to horizontal hoop pore canal and wears to restraint and need reciprocate and the narrow and small environmental requirement of construction working face, and the initial and several last steel strand wires construction of the horizontal hoop pore canal of being convenient for simultaneously avoids the extravagant purpose of steel strand wires.
Description
Technical Field
The utility model relates to a nuclear power station prestressing force construction field, concretely relates to large radius hoop horizontal duct prestressing force steel strand wires wear to restraint device.
Background
The novel nuclear power station post-tensioning method is provided with a bonding prestress system, the horizontal annular prestress hole channel has large annular radius, the length of the hole channel is about 160 meters, the inner diameter of the hole channel is small, steel strands in the hole channel are dense, the number of the horizontal annular hole channels is large, and the horizontal annular hole channels are distributed on a shell with the elevation of-8 m to 65m, so that a penetrating construction working face of the novel nuclear power station needs to move up and down, and the moving space is narrow. In the bundle penetrating process of the whole bundle traction of the steel strand, the related equipment is heavy and needs a steel strand bundle weaving construction working face. For horizontal annular prestressed duct crossing construction, a crossing process for whole-bundle traction of steel strands is difficult to apply. In the conventional operation process of using a strand pulling machine to pull the prestressed steel strands, for the same horizontal circumferential duct: the first few steel strands are difficult to penetrate out of the outlet end of the pore channel due to the large friction coefficient in the pore channel, the passing rate is low, and six to seven steel strands are generally wasted as a bedding; and the last steel strands are difficult to penetrate out of the outlet end of the pore passage because the steel strands existing in the pore passage are dense. Therefore, for the large-radius annular horizontal duct prestressed steel strand pulling construction, the conventional operation of pulling the prestressed steel strand by using a pulling machine in the prior art has obvious limitation, the requirement of the novel nuclear power station horizontal annular prestressed duct prestressed steel strand pulling construction is difficult to meet, and a large amount of waste of the steel strands can be caused.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a large radius hoop horizontal pore prestressing force steel strand wires wear to restraint device to the steel strand wires of solving among the prior art nuclear power plant horizontal hoop prestressing force pore are worn to restraint the construction and are had the initial and last steel strand wires to wear to restraint the degree of difficulty big, there is the problem of extravagant steel strand wires, the realization is applicable to horizontal hoop pore and wears to restraint and need reciprocate and the narrow and small environmental requirement of construction working face, the initial and several last steel strand wires construction of the horizontal hoop pore of being convenient for simultaneously, avoid the extravagant purpose of steel strand wires.
The utility model discloses a following technical scheme realizes:
a large-radius annular horizontal channel prestressed steel strand pulling device comprises a first conical sleeve and a second conical sleeve which are in threaded connection with each other, wherein a locking mechanism is detachably connected between the first conical sleeve and the second conical sleeve and used for limiting relative movement between the first conical sleeve and the second conical sleeve; the two ends of the guide steel wire rope are respectively positioned at the small-diameter ends of the first conical sleeve and the second conical sleeve; the conical sleeve II is also internally provided with a jack for accommodating a central wire end of a steel strand to be stranded; when the first conical sleeve is connected with the second conical sleeve, the small-diameter ends of the first conical sleeve and the second conical sleeve are far away from each other.
To the steel strand wires of the horizontal hoop prestressed duct of nuclear power plant among the prior art wear to restraint the construction and have the problem that initial and last steel strand wires wear to restraint the degree of difficulty big, extravagant steel strand wires, the utility model provides a large radius hoop horizontal duct prestressed steel strand wires wear to restraint device, this device mainly includes taper sleeve one, taper sleeve two and guide wire rope. The first conical sleeve and the second conical sleeve are connected through threads, and after the connection, the small-diameter ends of the first conical sleeve and the second conical sleeve are far away from each other, namely the small-diameter end of the first conical sleeve is located at one end far away from the second conical sleeve, and the small-diameter end of the second conical sleeve is located at one end far away from the first conical sleeve. When the first conical sleeve is connected with the second conical sleeve, the relative movement of the first conical sleeve and the second conical sleeve can be limited by a locking mechanism. And the conical sleeve II is also internally provided with a jack for accommodating the end of the central wire of the steel strand to be stranded, the central wire of the steel strand to be stranded is stripped during use and is placed into the jack of the conical sleeve II, so that the steel strand to be stranded moves together with the conical sleeve II. The application process is as follows: leading a guide steel wire rope into a prestressed horizontal annular pore canal to be strung; stripping out the central wire of the steel strand to be stranded, and placing the central wire into the jack of the conical sleeve II; the first conical sleeve and the second conical sleeve are connected through threads and locked by a locking mechanism; drawing and guiding the steel wire rope to drive the steel strand into the prestressed horizontal annular hole channel until a circle of annular penetration is completed; and releasing the locking of the locking mechanism, unscrewing the first conical sleeve and the second conical sleeve, and cutting off the steel strand to finish one-time strand pulling. The method is suitable for the strand pulling operation of each group of steel strands in the horizontal annular prestressed duct of the nuclear power station, and particularly can solve the problems that in the prior art, the steel strands are difficult to penetrate out of the outlet end of the duct due to the large friction coefficient in the duct, and the passing rate is low, so that the steel strands are wasted; in addition, the problem that the last steel strands cannot penetrate out of the outlet end of the pore passage easily due to the fact that the steel strands existing in the pore passage are dense can be solved through the small-diameter end conical structures of the conical sleeve I and the conical sleeve II.
Further, one end of the conical sleeve is provided with an internal thread hole, one end of the conical sleeve is provided with an external thread section, and the internal thread hole is matched with the external thread section.
Furthermore, the guide steel wire rope penetrates out from one end, far away from the internal thread, of the first conical sleeve, and the guide steel wire rope penetrates out from one end, far away from the external thread, of the second conical sleeve.
Furthermore, both ends of the guide steel wire rope are provided with end head pressure anchors, and cavities matched with the end head pressure anchors in size are arranged in the first conical sleeve and the second conical sleeve. And the end part of the guide steel wire rope is prevented from falling off from the first conical sleeve and the second conical sleeve in the traction process.
Furthermore, the locking mechanism comprises a locking pin, a first pin hole and a second pin hole, wherein the first pin hole is located on the first conical sleeve and communicated to the inner threaded hole, the second pin hole is located on the outer threaded section of the second conical sleeve, and the first pin hole and the second pin hole are matched with the locking pin. After the first conical sleeve and the second conical sleeve are connected in place, the first pin hole and the second pin hole are opposite to each other, and the locking function can be achieved by inserting the locking pin.
Furthermore, the axis of the jack is parallel to the axis of the conical sleeve II, and the anti-falling mechanism is used for preventing the central wire of the steel strand to be threaded from falling off from the jack.
The anti-falling mechanism is an expanding hole communicated with the jack, and the expanding hole is used for accommodating an end of a center wire of the steel strand to be strung to be subjected to upsetting.
Furthermore, the number of the insertion holes is N, the N insertion holes are annularly and uniformly distributed on the second conical sleeve, and N is larger than or equal to 3. The pulling of a plurality of steel strands can be completed at one time.
A strand pulling method of a large-radius annular horizontal channel prestressed steel strand pulling device comprises the following steps:
s1, inserting two ends of the guide steel wire rope into the first conical sleeve and the second conical sleeve respectively;
s2, introducing a guide steel wire rope into the prestressed horizontal annular hole channel to be bundled;
s3, stripping out the central wire of the steel strand to be stranded, and placing the central wire into the jack of the conical sleeve II and fixing the central wire;
s4, connecting the first conical sleeve and the second conical sleeve through threads, and locking by a locking mechanism;
s5, drawing and guiding the steel wire rope to drive the steel strand into the prestressed horizontal annular hole channel until a circle of annular penetration is completed;
and S6, releasing the locking of the locking mechanism, unscrewing the first conical sleeve and the second conical sleeve, and cutting the steel strand to finish one-time strand threading.
Furthermore, the end heads at two ends of the guide steel wire rope are subjected to anchor pressing, so that the end heads of the guide steel wire rope cannot fall off from the first conical sleeve and the second conical sleeve in the process of drawing the guide steel wire rope; and after the central wire of the strand penetrating steel strand is placed into the jack of the conical sleeve II, upsetting the end of the central wire of the strand penetrating steel strand by using a heading machine, so that the end of the central wire cannot pass through the jack.
Compared with the prior art, the utility model, following advantage and beneficial effect have:
the utility model relates to a large-radius circumferential horizontal duct prestressed steel strand pulling device, which is suitable for pulling operation of each group of steel strands in a nuclear power station horizontal circumferential prestressed duct, and particularly can solve the problems that in the prior art, the initial steel strands are difficult to be pulled out from the outlet end of the duct due to the large friction coefficient in the duct, and the passing rate is low, so that the steel strands are wasted; in addition, the problem that the last steel strands cannot penetrate out of the outlet end of the pore passage easily due to the fact that the steel strands existing in the pore passage are dense can be solved through the small-diameter end conical structures of the conical sleeve I and the conical sleeve II.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a cross-sectional view of a first tapered sleeve according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a second tapered sleeve according to an embodiment of the present invention;
fig. 3 is an overall schematic diagram of an embodiment of the present invention.
Reference numbers and corresponding part names in the drawings:
1-a first conical sleeve, 2-a second conical sleeve, 3-a guide steel wire rope, 4-a jack, 5-an end head press anchor, 6-a locking pin, 7-a first pin hole, 8-a second pin hole, 9-a diameter expanding hole and 10-a center wire.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.
Example 1:
the large-radius circumferential horizontal duct prestressed steel strand pulling device shown in fig. 1 to 3 comprises a first conical sleeve 1 and a second conical sleeve 2 which are in threaded connection with each other, wherein a locking mechanism is detachably connected between the first conical sleeve 1 and the second conical sleeve 2 and used for limiting relative movement between the first conical sleeve 1 and the second conical sleeve 2; the device also comprises a guide steel wire rope 3, wherein two ends of the guide steel wire rope 3 are respectively positioned at the small-diameter ends of the first conical sleeve 1 and the second conical sleeve 2; the conical sleeve II 2 is also internally provided with a jack 4 for accommodating a central wire end of a steel strand to be stranded; when the tapered sleeve I1 is connected with the tapered sleeve II 2, the small-diameter ends of the tapered sleeve I1 and the tapered sleeve II 2 are far away from each other.
The device of the embodiment is small and exquisite, has large bearing capacity, and can smoothly pass the steel strand through the large-radius annular horizontal prestress pore channel. And the design is simple, the operation is safe and fast, the waste of the steel strand is greatly reduced, and the construction efficiency is improved.
Example 2:
as shown in fig. 1 to 3, in the large-radius prestressed strand pulling device for the circumferential horizontal duct, on the basis of embodiment 1, one end of the first conical sleeve 1 is provided with an internal threaded hole, one end of the second conical sleeve 2 is provided with an external threaded section, and the internal threaded hole is matched with the external threaded section. The guide steel wire rope 3 penetrates out of one end, far away from the internal thread, of the first conical sleeve 1, and the guide steel wire rope 3 penetrates out of one end, far away from the external thread, of the second conical sleeve 2. The two ends of the guide steel wire rope 3 are provided with end head pressure anchors 5, and cavities matched with the end head pressure anchors 5 in size are arranged in the conical sleeve I1 and the conical sleeve II 2. The locking mechanism comprises a locking pin 6, a first pin hole 7 which is located on the first conical sleeve 1 and communicated to the inner threaded hole, and a second pin hole 8 which is located on the outer threaded section of the second conical sleeve 2, wherein the first pin hole 7 and the second pin hole 8 are matched with the locking pin 6. The axis of the jack 4 is parallel to the axis of the conical sleeve 2, and the anti-falling mechanism is used for preventing the central wire of the steel strand to be threaded from falling off from the jack 4. The anti-falling mechanism is an expanding hole 9 communicated with the jack 4, and the expanding hole 9 is used for accommodating an end of a center wire of a steel strand to be threaded to be subjected to upsetting. Four jacks 4 are annularly and uniformly distributed on the second conical sleeve 2.
The beam-threading method according to the embodiment includes:
two ends of a guide steel wire rope 3 are respectively penetrated into the conical sleeve I1 and the conical sleeve II 2, two end heads of the guide steel wire rope 3 are pressed and anchored,
leading the guide steel wire rope 3 into a prestressed horizontal annular pore canal to be strung;
stripping out the central wire 10 of the steel strand to be stranded, and placing the central wire into the jack 4 of the second conical sleeve 2 and fixing the central wire;
the conical sleeve I1 and the conical sleeve II 2 are connected through threads and locked by a locking mechanism;
the steel wire rope 3 is drawn and guided to drive the steel strand into the prestressed horizontal annular hole channel until a circle of annular penetration is completed;
and releasing the locking of the locking mechanism, unscrewing the first conical sleeve 1 and the second conical sleeve 2, cutting off the steel strand, completing one-time strand threading, stripping the central wire of the steel strand to be threaded again at the moment, and placing the central wire into the jack 4 of the second conical sleeve 2 to perform the next strand threading operation.
Preferably, the ends at the two ends of the guide steel wire rope 3 are anchored, so that the ends of the guide steel wire rope 3 cannot fall off from the first conical sleeve 1 and the second conical sleeve 2 in the process of drawing the guide steel wire rope 3;
preferably, after the central wire of the steel strand to be stranded is placed into the jack 4 of the conical sleeve II 2, the end of the central wire of the steel strand to be stranded is upset by using a heading machine, so that the end of the central wire cannot pass through the jack 4.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. The large-radius prestressed steel strand pulling device for the circumferential horizontal pore passage is characterized by comprising a first conical sleeve (1) and a second conical sleeve (2) which are in threaded connection with each other, wherein a locking mechanism is detachably connected between the first conical sleeve (1) and the second conical sleeve (2), and is used for limiting the relative movement between the first conical sleeve (1) and the second conical sleeve (2); the steel wire rope guide device is characterized by further comprising a guide steel wire rope (3), wherein two ends of the guide steel wire rope (3) are respectively located at the small-diameter ends of the first conical sleeve (1) and the second conical sleeve (2); the conical sleeve II (2) is also internally provided with a jack (4) for accommodating a central wire end of a steel strand to be stranded; when the first conical sleeve (1) is connected with the second conical sleeve (2), the small-diameter ends of the first conical sleeve (1) and the second conical sleeve (2) are far away from each other.
2. The large-radius circumferential horizontal duct prestressed steel strand pulling device as claimed in claim 1, wherein one end of the first conical sleeve (1) is provided with an internal threaded hole, one end of the second conical sleeve (2) is provided with an external threaded section, and the internal threaded hole and the external threaded section are matched with each other.
3. The large-radius circumferential horizontal tunnel prestressed steel strand pulling device as claimed in claim 2, wherein the guide steel wire rope (3) penetrates out from one end of the first conical sleeve (1) far away from the internal thread, and the guide steel wire rope (3) penetrates out from one end of the second conical sleeve (2) far away from the external thread.
4. The large-radius circumferential horizontal channel prestressed steel strand pulling device as claimed in claim 1, wherein both ends of the guiding steel wire rope (3) are provided with end head pressing anchors (5), and cavities matched with the size of the end head pressing anchors (5) are arranged in the conical sleeve I (1) and the conical sleeve II (2).
5. The large-radius circumferential horizontal hole prestress steel strand pulling device as claimed in claim 2, wherein the locking mechanism comprises a locking pin (6), a first pin hole (7) which is located on the first conical sleeve (1) and communicated with the internal threaded hole, and a second pin hole (8) which is located on an external threaded section of the second conical sleeve (2), wherein the first pin hole (7) and the second pin hole (8) are matched with the locking pin (6).
6. The large-radius circumferential horizontal duct prestressed steel strand pulling device as claimed in claim 1, wherein the axis of the insertion hole (4) is parallel to the axis of the conical sleeve II (2), and further comprising an anti-falling mechanism for preventing a central wire of a steel strand to be pulled from falling off the insertion hole (4).
7. The prestressed strand pulling device for large-radius circumferential horizontal ducts as claimed in claim 6, wherein said anti-slip means is a diameter-expanding hole (9) communicating with the insertion hole (4), said diameter-expanding hole (9) being adapted to receive the upset end of the central wire of the strand to be pulled.
8. The large-radius circumferential horizontal duct prestressed steel strand pulling device as claimed in claim 1, wherein the number of the insertion holes (4) is N, the N insertion holes (4) are annularly and uniformly distributed on the conical sleeve II (2), and N is greater than or equal to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922369190.5U CN211923565U (en) | 2019-12-25 | 2019-12-25 | Large-radius circumferential horizontal duct prestressed steel strand pulling device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922369190.5U CN211923565U (en) | 2019-12-25 | 2019-12-25 | Large-radius circumferential horizontal duct prestressed steel strand pulling device |
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| CN211923565U true CN211923565U (en) | 2020-11-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110905217A (en) * | 2019-12-25 | 2020-03-24 | 中国核工业二四建设有限公司 | Large-radius annular horizontal channel prestressed steel strand pulling device and method |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110905217A (en) * | 2019-12-25 | 2020-03-24 | 中国核工业二四建设有限公司 | Large-radius annular horizontal channel prestressed steel strand pulling device and method |
| CN110905217B (en) * | 2019-12-25 | 2024-02-27 | 中国核工业二四建设有限公司 | Large-radius circumferential horizontal duct prestress steel strand threading device and method |
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