Vertical seam connection grouting device for prefabricating fan duct piece

Abstract

The utility model belongs to the technical field of fans, and provides a vertical seam connection grouting device for prefabricated fan segments, which comprises a grouting bottom plate, a grouting top plate and two closed-pore plates with the same size, and the two closed-pore plates are symmetrically arranged on two sides of a vertical seam between the two prefabricated fan segments; the grouting top plate is fixed to the top ends of the two closed-pore plates through bolts, the grouting bottom plate is fixed to the bottom ends of the two closed-pore plates through bolts, and the grouting bottom plate, the grouting top plate and the two closed-pore plates are fixedly connected through bolts to form a square shape; a grout inlet hole is formed in the middle of the grouting bottom plate, a grout outlet hole is formed in the middle of the grouting top plate, and the grout inlet hole and the grout outlet hole are located on the same straight line with the vertical seam. The operation is simpler and more convenient, and the sealing performance is more reliable.

Description

Technical Field

[0001] The utility model belongs to the technical field of fans, and in particular relates to a vertical seam connection grouting device for prefabricated fan pipe segments. Background Art

[0002] The statements in this section merely provide background technical information related to the present invention and do not necessarily constitute prior art.

[0003] With the continuous advancement of wind power generation technology, ultra-high wind turbines with larger unit capacity and higher power generation efficiency are becoming increasingly popular. As the key supporting structure of ultra-high wind turbines, the quality of the tower is directly related to the overall performance of the wind turbine. As an important part of the tower, the connection quality of the prefabricated wind turbine segments directly determines the strength and stability of the tower. Once there are quality problems at the segment connection, it will not only reduce the overall strength of the tower, but also damage its stability and may even cause serious safety accidents. Therefore, strict control of the segment connection quality is crucial.

[0004] The traditional prefabricated fan segment vertical joints are connected using bottom grouting technology. The bottom grouting assembly is fixed to the bottom of the vertical joint with a bandage. The steps are cumbersome and the reliability is poor. The sealing of the vertical joints between the segments is achieved by the pre-compression of the sealing strip and the joint surface of the segment. There is no measure to balance the air pressure. During the grouting operation, due to excessive internal pressure, the sealing strip may crack or even be damaged, which is prone to leakage. Utility Model Content

[0005] In order to solve the above-mentioned problem, the utility model proposes a vertical seam connection grouting device for prefabricated fan segments, two closed-hole plates are symmetrically arranged on both sides of the vertical seam between the two prefabricated fan segments, and the bottom grouting assembly and the grouting top plate are fixed to the closed-hole plates by fixing bolts instead of bandages, which makes the operation easier and the sealing more reliable.

[0006] According to some embodiments, the utility model adopts the following technical solutions:

[0007] In a first aspect, a vertical joint connection grouting device for prefabricated fan segments is proposed, comprising a grouting bottom plate, a grouting top plate and two closed-hole plates of the same size, wherein the two closed-hole plates are symmetrically arranged on both sides of the vertical joint between two prefabricated fan segments;

[0008] The grouting top plate is fixed to the top ends of the two closed hole plates by bolts, and the grouting bottom plate is fixed to the bottom ends of the two closed hole plates by bolts. After the grouting bottom plate, the grouting top plate and the two closed hole plates are fixedly connected by bolts, they are in a square shape.

[0009] A grouting hole is provided in the middle of the grouting bottom plate, and a grouting outlet hole is provided in the middle of the grouting top plate, and both the grouting hole and the grouting outlet hole are located in a straight line with the vertical joint.

[0010] Furthermore, a plurality of evenly distributed air outlet holes are formed starting from the middle of the closed-cell plate.

[0011] Furthermore, it also includes a rubber plug for sealing the air outlet.

[0012] Furthermore, the diameter of the rubber plug is the same as the diameter of the air outlet, and the rubber plug has parallel threads.

[0013] Furthermore, two sealing strips are arranged between the prefabricated fan segment and each closed-hole plate, and the two sealing strips are arranged on both sides of the closed-hole plate.

[0014] Furthermore, the length of the sealing strip is consistent with the length of the closed-cell plate.

[0015] Further, it also includes a connector;

[0016] One end of the connector is connected to the slurry inlet hole, and the other end of the connector is connected to a pumping machine connected to a mortar mixer through a grouting pipe.

[0017] Furthermore, it also includes a valve arranged on the connecting head.

[0018] Furthermore, the length of the closed-cell plate is consistent with the length of the vertical slit.

[0019] Furthermore, the grouting bottom plate and the grouting top plate have the same size and are both rectangular plates.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] The utility model provides a vertical seam connection grouting device for prefabricated fan segments, wherein two closed-hole plates are symmetrically arranged on both sides of the vertical seam between the two prefabricated fan segments, and the bottom grouting assembly and the grouting top plate are fixed to the closed-hole plates by means of fixing bolts, replacing bandages, so that the operation is simpler and the sealing is more reliable.

[0022] The utility model provides a vertical joint connection grouting device for prefabricated fan segments, which adds a plurality of exhaust holes and rubber plugs on the closed-hole plate, so that grouting can be carried out in stages, thereby improving the quality of vertical joint grouting and solving the problems of poor grouting density and easy leakage caused by the oversized segments of the ultra-high fan hybrid tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0024] Figure 1 It is a schematic diagram of the overall structure of a vertical seam connection grouting device for prefabricated fan segments of the utility model;

[0025] Figure 2 It is a top view of the arrangement of the prefabricated fan segments of the utility model;

[0026] Figure 3 It is a side view of the bottom grouting assembly of the utility model;

[0027] Figure 4 It is a side view of the grouting top plate of the utility model;

[0028] Figure 5 It is a top view of the grouting base plate of the utility model;

[0029] Figure 6 It is a side view of the closed hole plate of the utility model;

[0030] Figure 7 It is a front view of the closed hole plate of the utility model;

[0031] Figure 8 It is a schematic diagram of the rubber plug of the utility model;

[0032] Fig. 9 This is a schematic diagram of the installation of the closed-hole plate at the vertical seam of the utility model;

[0033] Fig.10 It is a detailed cross-sectional view of the vertical seam of the utility model;

[0034] Fig.11 It is a schematic diagram of the slurry pumping process of the utility model;

[0035] Fig.12 It is a schematic diagram of the prefabricated fan pipe segment and vertical seam dowel bars of the utility model. DETAILED DESCRIPTION

[0036] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0037] It should be noted that the following detailed descriptions are all exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0038] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the term "comprising" is used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0039] In the present invention, terms such as "upper", "vertical", "horizontal", "upward", "downward" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are relational words determined only for the convenience of describing the structural relationships of the various parts or elements of the present invention. They do not specifically refer to any part or element in the present invention and cannot be understood as limitations on the present invention.

[0040] In the present invention, terms such as "fixed" and "fixed" should be understood in a broad sense, indicating that the connection can be fixed, integral or detachable. Relevant scientific research or technical personnel in this field can determine the specific meaning of the above terms in the present invention according to specific circumstances, and they cannot be understood as limiting the present invention.

[0041] This embodiment provides a vertical seam connection grouting device for prefabricated fan segments.

[0042] The present embodiment provides a vertical joint grouting device for prefabricated fan segments, which is suitable for vertical joint grouting of new prestressed assembled hybrid tower segments.

[0043] This embodiment provides a vertical joint grouting device for prefabricated fan segments, such as Figure 1 As shown, it includes a bottom grouting assembly 7, a grouting top plate 12, a rubber plug and two closed-cell plates 16 with exactly the same size and shape.

[0044] like Figure 6 and Figure 7 As shown, a plurality of evenly distributed air outlet holes 4 are provided starting from the middle of the closed hole plate 16 , and closed hole plate bolt holes 14 are provided at both ends of the closed hole plate 16 .

[0045] As an implementation mode, two evenly distributed air outlet holes 4 are provided starting from the middle of the closed-cell plate 16 .

[0046] During use, two prefabricated fan segments 1 (in the form of a quarter circle) are spliced ​​on the same horizontal plane, and the straight steel bar segments of the vertical seam dowels 6 are installed at the joint surfaces of the prefabricated fan segments. The vertical seam dowels 6 are installed at the joint surfaces of the prefabricated fan segments through dowel installation joints 19. Specifically, the vertical seam dowels 6 are L-shaped, and include straight steel bar segments and corner steel bar segments. One of the two adjacent prefabricated fan segments has a plurality of vertical seam dowels 6 embedded from top to bottom on one side close to the joint, wherein the corner steel bar segments are embedded in the prefabricated fan segment and the straight steel bar segments extend out; the other of the two adjacent prefabricated fan segments is provided with an insertion opening 21 at the same height as the vertical seam dowel 6, and a dowel installation joint 19 is fixedly provided on the outer side of the insertion opening 21. The straight steel bar segment is inserted into the insertion opening 21 in the other prefabricated fan segment through the dowel installation joint 19, as shown in FIG. Fig.12 shown.

[0047] like Fig. 9 As shown, two closed hole plates 16 are symmetrically pasted on both sides of the joint (also called vertical joint) 2 between two prefabricated fan segments. The length of the two closed hole plates 16 is consistent with the length of the joint 2.

[0048] like Fig. 9 As shown, two sealing strips 17 are arranged between the prefabricated fan segments and each closed hole plate 16, and the two sealing strips are arranged on both sides of the air outlet 4 of the closed hole plate 16. The length of the sealing strip is consistent with the length of the closed hole plate 16.

[0049] like Figure 3 As shown, the bottom grouting assembly 7 includes a grouting bottom plate 8, a connecting head 9 and a valve 10.

[0050] like Figure 4 As shown, the grouting top plate 12 is rectangular, with bolt holes 11 provided at both ends of the grouting top plate 12 and a grouting hole 5 provided in the middle of the grouting top plate 12. Figure 5 As shown, the grouting bottom plate 8 is rectangular and consistent in size with the grouting top plate 12, and can cover the cross-section of the vertical joint. Bolt holes 11 are opened at both ends of the grouting bottom plate 8, and a grouting hole 13 is opened in the middle of the grouting bottom plate 8. The grouting hole 13 and the grouting hole 5 are both located in a straight line with the vertical joint.

[0051] As an embodiment, the two bolt holes 11 and the grouting hole 5 provided on the grouting top plate 12 are located on the central axis of the grouting top plate 12. Similarly, the two bolt holes 11 and the grouting hole 13 provided on the grouting bottom plate 8 are located on the central axis of the grouting bottom plate 8.

[0052] The closed-hole plate bolt holes 14 at the top of the two closed-hole plates 16 are respectively connected to the two bolt holes 11 opened on the grouting top plate 12 by bolts. The closed-hole plate bolt holes 14 at the bottom of the two closed-hole plates 16 are respectively connected to the two bolt holes 11 opened on the grouting bottom plate 8 by bolts. After the grouting bottom plate 8, the grouting top plate 12 and the two closed-hole plates 16 are connected by bolts, they are in a square shape.

[0053] like Figure 3 and Fig.11 As shown, one end of the connector 9 is connected to the grouting hole 13, and the other end of the connector 9 is connected to the pumping machine through the grouting pipe 20, and the pumping machine is connected to the mortar mixer. A valve 10 is provided on the connector 9.

[0054] The rubber plug 15 is used to seal the vent hole 4 to achieve phased grouting. The rubber plug adapted to the vent hole 4 has the same diameter as the vent hole 4 and is a rubber plug with soft parallel threads that can increase sealing performance. Figure 8 shown.

[0055] The present embodiment provides a vertical seam connection grouting device for prefabricated fan segments, wherein two closed-hole plates are symmetrically arranged on both sides of the vertical seam between the two prefabricated fan segments, and the bottom grouting assembly and the grouting top plate are fixed to the closed-hole plates by fixing bolts instead of bandages, making the operation easier and the sealing more reliable.

[0056] The present embodiment provides a vertical joint connection grouting device for prefabricated fan segments, which adds a plurality of exhaust holes and rubber plugs on the closed-hole plate, so that grouting can be carried out in stages, thereby improving the quality of vertical joint grouting and solving the shortcomings of poor grouting density and easy leakage caused by the oversized segments of ultra-high fan hybrid towers.

[0057] The present embodiment provides a vertical seam connection grouting device for prefabricated fan segments, which is suitable for the construction of assembled super-high fan hybrid towers.

[0058] The present embodiment provides a vertical joint connection grouting device for prefabricated fan segments, and a method for using the device comprises the following steps:

[0059] (1) Prepare grouting materials.

[0060] This embodiment uses geopolymer as the grouting material.

[0061] The cementitious material mix ratio for preparing geopolymer is fly ash and blast furnace slag (1:1).

[0062] First, prepare the alkali activator 24 hours in advance. The alkali activator is prepared by mixing water glass solution, sodium hydroxide and water. Then, dry mix the cementitious material with sand, with a sand-binder ratio of 1.5:1. Then, add the alkali activator and water reducer and wet mix, with a water-binder ratio of 0.3, until the geopolymer slurry is uniform. Finally, test the fluidity of the geopolymer grouting material, which should meet the quality standard requirements for the vertical joint connection of the prefabricated pipe segment.

[0063] (2) Splicing and vertical seam cleaning of prefabricated fan segments.

[0064] First, the prefabricated fan segments should be supported on supporting structures, such as independent brackets, cross steel beams or concrete piers, etc. The positions of the supporting structures should be evenly distributed to facilitate the placement of the prefabricated fan segments; to ensure that the supporting surface of the prefabricated fan segments is flat, the support should be easy to level the surface using steel pads or other methods. To ensure that the two prefabricated fan segments 1 are spliced ​​on the same horizontal plane, the flatness of the supporting surface should be 2mm, that is, the tolerance relative to the reference plane should be ±1mm, therefore, 1mm and 2mm thick thin plates are required as leveling pads.

[0065] Then, if there is rust, dust, debris or water accumulation on the prefabricated fan duct segment parts, they should be cleaned with a high-pressure air gun before splicing the prefabricated fan duct segments to ensure that they are dry and clean.

[0066] Then, the straight steel bar sections of the vertical seam dowel bars 6 are installed at the joint surfaces of the prefabricated fan segments, and the extended length and torque of the vertical seam dowel bars 6 are checked to meet the specified length and torque requirements.

[0067] Then, a closed-hole plate 16 with air outlet holes 4 is prefabricated, such as Figure 6 and Figure 7 As shown, threaded closed-hole plate bolt holes 14 are left at both ends of the closed-hole plate 16, two evenly distributed air outlet holes 4 are left on the closed-hole plate 16, and a closed-hole plate 16 is respectively pasted on both sides of the concrete in each joint of the prefabricated fan pipe segment.

[0068] Then, adjust the gap between the prefabricated fan segments, compress the sealing strip 17, and control the vertical gap to 20 mm.

[0069] Then, the bottom grouting assembly (also called bottom grouting assembly) 7 and the grouting top plate 12 are respectively fixed to the top and bottom ends of the two closed-hole plates 16 on both sides of the vertical seam 2 by bolts to complete the splicing work. The two closed-hole plates 16 on both sides of the vertical seam 2 are arranged as follows: Fig. 9 shown.

[0070] Finally, verify the ring (four prefabricated fan segments are spliced ​​into a ring, such as Figure 2Check whether the splicing is firm, measure the top and bottom inner and outer diameters, the distance relative to the segment bellows, the vertical seam gap, and the centering and misalignment of the prefabricated components to verify the geometric dimensions. If the size requirements are not met, adjustments must be made to correct them until all requirements are met.

[0071] (3) Install grouting equipment.

[0072] Specifically, the geopolymer grouting material is introduced into the mortar mixer for mixing, and the pumping machine is connected to the grouting hole 13 opened in the middle of the grouting bottom plate 8 by using the grouting pipe and the connector 9, and the valve 10 provided on the connector 9 is opened, and the pumping machine pumps the geopolymer grouting material 18 to the grouting hole 13, and then enters the grouting port 3 at the bottom of the vertical joint, and then enters the vertical joint, such as Figure 1 , Fig.10 and Fig.11 shown.

[0073] (4) Carry out grouting operation and verify the density of the slurry.

[0074] Specifically, the vent hole 4 and the rubber plug 15 can be used to grout in stages. Figure 1 As shown, two vent holes 4 are added to the closed-cell plate 16, and grouting is carried out in three stages. To ensure that the geopolymer grouting material (referred to as grouting material) is sufficient to meet the requirements of vertical joint grouting, at least 25% of the material should be reserved, and the grouting volume, surrounding environment and grouting temperature should also be checked and recorded.

[0075] First, start the grouting pump (i.e., pumping machine) and monitor the grouting situation in real time. If slurry leakage occurs, the grouting should be stopped in time. When the slurry flows out from the first (the first from the bottom up) vent without bubbles, seal it with a rubber plug in time.

[0076] Then, when the slurry flows out from the second vent (the second one from the bottom up) and there are no bubbles, seal it with a rubber stopper in time.

[0077] Then, when the slurry flows out from the slurry outlet hole 5 at the top of the vertical joint without bubbles, lower the pressure of the grouting pump and let it stand for a while.

[0078] Finally, pull out the rubber plug of the first air outlet. If the slurry is observed to gush out, quickly seal the rubber plug, which proves that the density of the slurry in the first section of vertical joint is good. Repeat this operation for the second air outlet.

[0079] Among them, the two vertical seams of each component (prefabricated fan segment) should be grouted at the same time to ensure the overall stability of the prefabricated fan segment.

[0080] In addition, if there is no slurry flowing out of the air outlet or the top slurry outlet hole, slurry blockage may occur and the air outlet or the top slurry outlet hole should be replenished in time.

[0081] (5) Maintenance of vertical joint grouting and removal of grouting equipment.

[0082] After the grouting operation is completed, the vertical joint area should be protected from the adverse effects of direct sunlight, strong winds, rain, snow, ice and avoid contact with corrosive agents.

[0083] If the daily average temperature is lower than 5℃, the vertical joints should be covered with a maintenance blanket; if the daily average temperature is higher than 35℃, the vertical joints should be covered with wet materials or watered to cool down.

[0084] 6 hours after the grouting is completed, the grouting equipment is removed and the construction site is cleaned up.

[0085] Within 12 hours after the grouting is completed, the concrete surface temperature near the vertical joints should not be lower than 0℃.

[0086] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A vertical joint grouting device for prefabricated fan segments, characterized in that: It includes a grouting bottom plate, a grouting top plate and two closed-hole plates of the same size, and the two closed-hole plates are symmetrically arranged on both sides of the vertical seam between two prefabricated fan segments; The grouting top plate is fixed to the top ends of the two closed-hole plates by bolts, and the grouting bottom plate is fixed to the bottom ends of the two closed-hole plates by bolts. After the grouting bottom plate, the grouting top plate and the two closed-hole plates are fixedly connected by bolts, they are in a U-shape; A grouting hole is provided in the middle of the grouting bottom plate, and a grouting outlet hole is provided in the middle of the grouting top plate, and the grouting hole and the grouting outlet hole are both located in a straight line with the vertical joint.

2. A vertical joint grouting device for prefabricated fan segments according to claim 1, characterized in that: A plurality of evenly distributed air outlet holes are formed starting from the middle of the closed-cell plate.

3. A vertical joint grouting device for prefabricated fan segments according to claim 2, characterized in that: Also included is a rubber plug for sealing the air outlet.

4. A vertical joint grouting device for prefabricated fan segments according to claim 3, characterized in that: The diameter of the rubber plug is the same as the diameter of the air outlet, and the rubber plug has parallel threads.

5. The vertical joint connection grouting device for prefabricated fan segments according to claim 1 is characterized in that: Two sealing strips are arranged between the prefabricated fan segments and each closed-hole plate, and the two sealing strips are arranged on both sides of the closed-hole plate.

6. A vertical joint grouting device for prefabricated fan segments according to claim 5, characterized in that: The length of the sealing strip is consistent with the length of the closed-cell plate.

7. The vertical joint connection grouting device for prefabricated fan segments according to claim 1 is characterized in that: Also includes a connector; One end of the connector is connected to the slurry inlet hole, and the other end of the connector is connected to a pumping machine connected to a mortar mixer through a grouting pipe.

8. A vertical joint grouting device for prefabricated fan segments according to claim 7, characterized in that: Also included is a valve arranged on the connecting head.

9. The vertical joint connection grouting device for prefabricated fan segments according to claim 1, characterized in that: The length of the closed-cell plate is consistent with the length of the vertical slit.

10. The vertical joint connection grouting device for prefabricated fan segments according to claim 1, characterized in that: The grouting bottom plate and the grouting top plate have the same size and are both rectangular plates.

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