Single-layer wire-wrapped PCCP (prestressed concrete cylinder pipe)

Abstract

The utility model discloses a single-layer wire wrapping PCCP (prestressed concrete cylinder pipe), and particularly relates to the technical field of PCCPs. The single-layer wire winding PCCP comprises an inner concrete layer, a steel cylinder is installed on the outer wall of the inner concrete layer, the steel cylinder is composed of a cylinder body, a socket ring and a spigot ring, an outer concrete layer is prefabricated on the outer side of the steel cylinder, a plurality of circles of winding wires are wound on the outer portion of the outer concrete layer, the winding wires are 10 mm prestressed steel wires or 9.53 mm prestressed steel strands, and the diameter of the steel cylinder is larger than that of the cylinder body. A first fixing piece and a second fixing piece are installed on the bell mouth ring and the spigot ring respectively, and the outermost layer of the single-layer wire wrapping PCCP is a protective layer. The single-layer wire winding PCCP provided by the utility model can be used for fixing a large-prestress winding wire and has stronger bearing capacity.

Description

TECHNICAL FIELD

[0001] The utility model relates to PCCP technical field especially relates to a single layer winding PCCP. BACKGROUND

[0002] PCCP (prestressed concrete cylinder pipe) is widely used in the development and construction of water conservancy and municipal engineering in China due to its wide application range, strong external load resistance, low economic cost, convenient installation and other advantages. PCCP is a composite pipe material composed of a concrete pipe core, a steel cylinder, prestressed steel wire and a mortar protective layer. The prestressed steel wire is a key load-bearing structure that generates uniform pre-compressive stress on the pipe core to resist the tensile stress generated by the internal and external loads of the pipe.

[0003] The prestressed steel wire currently used in China is 4-7mm cold-drawn steel wire. When the pipe is under high load conditions (working pressure ≥1.0Mpa, soil cover ≥6m), the area of the circumferential prestressed steel wire of the pipe needs to be increased accordingly. In many cases, single-layer winding with 7mm steel wire cannot meet the requirements according to the minimum pitch specified in the standard. At this time, multi-layer winding is generally used to ensure the area of the circumferential prestressed steel wire, i.e. 2-3 layers of prestressed steel wire need to be wound. During the production of multi-layer winding pipes, the winding is first carried out according to the conventional process and the cement mortar protective layer is produced. Then the surface of the first layer of mortar protective layer is scraped flat. After the strength of the scraped mortar protective layer meets the winding requirements, the second layer of winding is carried out. This cycle continues until the designed number of winding layers is reached. Although multi-layer winding pipes can meet the engineering requirements, there are the following problems in the manufacturing process: ① The existing mortar protective layer scraping technology cannot guarantee that the surface of the scraped mortar is 100% flat, and there will always be unevenness, which will cause the prestressed steel wire of the second layer of winding to not fully adhere to the surface of the mortar, thereby causing uneven stress on the steel wire and affecting the safe operation of the pipe; ② Multi-layer winding will significantly reduce the production efficiency of the pipe and increase the labor cost. The efficiency is reduced by 32% and the labor cost is increased by 43%. In view of the above problems, single-layer winding PCCP is developed. Single-layer winding PCCP uses 10mm prestressed steel wire or 9.53mm steel strand for winding. When winding, the prestress on the 10mm prestressed steel wire or 9.53mm prestressed steel strand will be much greater than that on the traditional prestressed steel wire, which will directly cause the traditional prestressed steel wire end fixing buckle to be unable to be applied to the fixation of 10mm prestressed steel wire or 9.53mm prestressed steel strand under large prestress.

[0004] Therefore, it is necessary to provide a single-layer winding PCCP to solve the above technical problems. UTILITY MODEL CONTENTS

[0005] In view of the above, in order to overcome the defects of the prior art, the utility model provides a single layer of wire winding PCCP can fix the large prestressed winding wire, and the bearing capacity is stronger.

[0006] In order to achieve the above object, the utility model adopts the technical scheme as follows:

[0007] Single layer of wire winding PCCP, including: inner concrete layer, the inner concrete layer outer wall is installed with steel cylinder, the steel cylinder is composed of cylinder body, socket ring, spigot ring, the steel cylinder outside prefabricated with outer concrete layer, the outer concrete layer is wound with multiple turns of winding wire, the winding wire is 10mm prestressed steel wire or 9.53mm prestressed steel strand, first fixed part and second fixed part are installed on socket ring and spigot ring respectively, the outermost layer of single layer of wire winding PCCP is protective layer, the protective layer is mortar protective layer or concrete protective layer, the first fixed part and the second fixed part are used for fixing the winding wire, the first fixed part is fixedly connected with the socket ring, the first fixed part is composed of fixed block and clamping type lock that are welded on socket ring, fixed block and socket ring welding make fixed point more reliable, clamping type lock is welded on the fixed block, the second fixed part includes base welded on interface, installation structure is arranged on the base, first clamping block is fixed on the installation structure, second clamping block is installed on the first clamping block through multiple screws, half-arc-shaped lock body is welded on the first clamping block and the second clamping block.

[0008] Preferably, the base is provided with a slot, the installation structure includes an insertion block and a connecting block, the insertion block is fixed with the connecting block, the connecting block is fixed with the first clamping block, and the insertion block is matched with the slot.

[0009] Preferably, the insertion block is cylindrical, the insertion block is set to be cylindrical, the insertion block can be conveniently rotated, the insertion block is rotated to drive the first clamping block to rotate through the connecting block, so that the clamping type lock composed of the two half-arc-shaped lock bodies and the clamping pieces can be rotated.

[0010] Preferably, the longest distance of the cross section of the connecting block is less than the minimum distance of the upper opening of the slot.

[0011] Preferably, the top of the connecting block is higher than the top of the base.

[0012] Preferably, the base is further provided with a plugging block, the plugging block is matched with the slot, the plugging block is fixed with the base through two screws, and the bottom of the plugging block is provided with a friction groove.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] (1) The utility model discloses a plurality of turns 10mm prestressed steel wire or 9.53mm prestressed steel strand are wound on the surface of outer layer concrete, realize PCCP single layer winding wire under high load condition, improve the pipeline production efficiency (promotion 32%), reduce the artificial and material cost (decrease 43%), and realize PCCP single layer winding wire under high load condition, reduce the pipeline quality defect after, can more ensure the safe operation of pipeline design life cycle;

[0015] (2) The original small diameter clamping groove type anchoring fast cannot fix the large diameter prestressed steel wire, and the utility model discloses can fix the large diameter prestressed winding wire through the use of first fixing piece and second fixing piece;

[0016] (3) The utility model discloses the design of the insertion slot and the insertion block between the base and the mounting structure, realize convenient and quick connection, improve the installation efficiency;

[0017] (4) The utility model discloses the position of first clamping block is adjusted by rotating the insertion block, so that the clip type lock can fix the winding wire at flexible angle, and the winding wire angle difference of different PCCP is adapted. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The utility model provides the structure schematic diagram of single layer winding wire PCCP;

[0019] Figure 2 It is Figure 1 The internal structure schematic diagram of single layer winding wire PCCP shown in figure 2;

[0020] Figure 3 It is Figure 1 The internal structure schematic diagram of single layer winding wire PCCP shown in figure 2;

[0021] Figure 4 The structure schematic diagram of second fixing piece;

[0022] Figure 5 The exploded view of second fixing piece;

[0023] Figure 6 The exploded view of second fixing piece;

[0024] Figure 7 It is the schematic diagram of half arc lock body and clip.

[0025] Among them, the name corresponding to the reference sign is: 1-steel cylinder, 2-outer concrete layer, 3-winding wire, 4-protection layer, 51-first fixing piece, 52-second fixing piece, 6-base, 7-first clamping block, 8-second clamping block, 9-half arc lock body, 10-clip, 11-insertion slot, 12-insertion block, 13-connection block, 14-plugging block, 15-screw, 16-friction groove. DETAILED DESCRIPTION

[0026] The utility model will be further explained in combination with the drawings and examples, and the mode of the utility model includes but is not limited to the following examples.

[0027] As Figures 1-7 As shown in, single layer silk winding PCCP provided by the utility model, including: inner concrete layer, the inner concrete layer outer wall is equipped with steel cylinder 1, the steel cylinder 1 is composed of cylinder body, socket ring, spigot ring, the outer side of steel cylinder 1 is prefabricated with outer concrete layer 2, the outer concrete layer 2 is wound with multiple turns of winding wire 3, the winding wire 3 is 10mm prestressed steel wire or 9.53mm prestressed steel strand, the socket ring and the spigot ring are equipped with first fixed part 51 and second fixed part 52 respectively, the outermost layer of single layer silk winding PCCP is protective layer 4, the protective layer 4 is mortar protective layer or concrete protective layer, the first fixed part 51 and the second fixed part 52 are all used to fix the winding wire, the first fixed part 51 is fixedly connected with the socket ring, the first fixed part 51 is composed of fixed block welded on the socket ring and clamping type lock, fixed block and socket ring welding make fixed point more reliable, clamping type lock is welded on the fixed block, and such combination can adapt to greater tensile stress of winding wire, the second fixed part 52 includes base 6 welded on the interface, the base 6 is provided with mounting structure, the mounting structure is fixed with first clamping block 7, the first clamping block 7 is provided with second clamping block 8 through a plurality of screws, the first clamping block 7 and the second clamping block 8 are all welded with semicircular lock body 9, when the first clamping block 7 is fixed with the second clamping block 8, two semicircular lock bodies 9 form a complete clamping type lock body, and the clamping piece 10 is arranged between the two semicircular lock bodies 9, and the two semicircular lock bodies 9 and the clamping piece 10 form a complete clamping type lock, after winding, the winding wire needs to be fixed on the second fixed part 52, before installation, the second clamping block 8 is removed from the first clamping block 7, when installing, the winding wire is located in the semicircular lock body 9, then the second clamping block 8 is fixed on the first clamping block 7, and finally the clamping piece 10 is inserted, so that the fixing of one end of the winding wire is realized, and the first fixed part 51 and the second fixed part 52 realize the fixing of both ends of the winding wire, and the fixed points all adopt welding and clamping type lock, can bear greater stress, so as to adapt to large diameter, large prestressed winding wire. EMBODIMENT

[0028] As Figure 5As shown, the base 6 is provided with a slot 11, the mounting structure comprises an insertion block 12 and a connecting block 13, the insertion block 12 is fixed with the connecting block 13, the connecting block 13 is fixed with the first clamping block 7, the insertion block 12 is matched with the slot 11, during installation, the insertion block 12 is inserted into the slot 11 and pushed into the slot 11, so that the connection between the base 6 and the mounting structure is completed, in the embodiment, the slot 11 and the insertion block 12 are adopted, so that the convenient and rapid connection between the base 6 and the mounting structure is realized, and then the rapid installation of the first clamping block 7 is realized.

[0029] Further, the insertion block 12 is cylindrical, the insertion block 12 is provided in a cylindrical shape, so that the insertion block 12 can be conveniently rotated, the insertion block 12 is rotated to drive the first clamping block 7 to rotate through the connecting block 13, so that the clamping type lock composed of the two semi-arc lock bodies 9 and the clamping piece 10 can be rotated, so that the semi-arc lock body 9 can be fixed at a flexible angle, and the inclination angle of the tail end of the winding wire is not fixed during the winding process, and the angle of the winding wire of different PCCPs is different, and the embodiment can adapt to the difference, and the fixed angle is flexible and changeable.

[0030] Still further, the longest distance of the cross section of the connecting block 13 is smaller than the minimum distance of the upper opening of the slot 11, so that the connecting block 13 can be rotated along with the insertion block 12.

[0031] Still further, the top of the connecting block 13 is higher than the top of the base 6, so that the first clamping block 7 can not be interfered by the base 6 during rotation.

[0032] Further, the base 6 is further provided with a blocking block 14, the blocking block 14 is matched with the slot 11, the blocking block 14 is fixed with the base 6 through two screws 15, the bottom of the blocking block 14 is provided with a friction groove 16, when the blocking block 14 is installed in the slot 11, the friction groove 16 is in contact with the insertion block 12, and the blocking block 14 is used for blocking the slot 11 and fixing the insertion block 12.

[0033] In the utility model, when winding, one end of the winding wire is first fixed on the first fixing part 51, then the winding is started, when the winding is finished, the insertion block 12 is inserted into the slot 11, so that the rapid installation of the first clamping block 7 is realized, then the semi-arc lock body 9 of the winding wire is located in the arc structure of the first clamping block 7, then the second clamping block 8 is installed on the first clamping block 7, finally, the clamping piece 10 is inserted into the two semi-arc lock bodies 9, the fixing of the winding wire is realized, and the fixing of the winding wire is completed.

Claims

1. A single layer wire wound PCCP, characterized in that, Include: The inner concrete layer is provided with a steel cylinder (1) outside the wall, the steel cylinder (1) is composed of a cylinder, a socket ring and a spigot ring, the outer side of the steel cylinder (1) is prefabricated with an outer concrete layer (2), the outer concrete layer (2) is wrapped with a plurality of winding wires (3), the socket ring and the spigot ring are respectively provided with a first fixing part (51) and a second fixing part (52), the outermost layer of the single-layer winding wire PCCP is a protective layer (4), the first fixing part (51) is fixedly connected with the socket ring, the first fixing part (51) is composed of a fixing block welded on the socket ring and a clamping type lock, the clamping type lock is welded on the fixing block, the second fixing part (52) includes a base (6) welded on the interface, the base (6) is provided with a mounting structure, the mounting structure is fixedly provided with a first clamping block (7), the first clamping block (7) is provided with a second clamping block (8) through a plurality of screws, and the first clamping block (7) and the second clamping block (8) are both welded with a semicircular lock body (9).

2. The single layer wire wound PCCP according to claim 1, wherein, The base (6) is provided with a slot (11), the mounting structure includes a plug (12) and a connecting block (13), the plug (12) is fixed with the connecting block (13), the connecting block (13) is fixed with the first clamping block (7), and the plug (12) is matched with the slot (11).

3. The single layer wire wound PCCP according to claim 2, wherein, The plug (12) is cylindrical.

4. The single layer wire wound PCCP according to claim 2, wherein, The longest distance of the cross section of the connecting block (13) is smaller than the minimum distance of the upper opening of the slot (11).

5. The single layer wire wound PCCP according to claim 2, wherein, The top of the connecting block (13) is higher than the top of the base (6).

6. The single layer wire wound PCCP according to claim 2, wherein, The base (6) is also provided with a plugging block (14), the plugging block (14) is matched with the slot (11), the plugging block (14) is fixed with the base (6) through two screws (15), and the bottom of the plugging block (14) is provided with a friction groove (16).

7. The single layer wire wound PCCP according to claim 1, wherein, The winding wire (3) is a 10mm prestressed steel wire or a 9.53mm prestressed steel strand.

8. The single layer wire wound PCCP according to claim 1, wherein, The protective layer (4) is a mortar protective layer or a concrete protective layer.

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