CN203023737U - Short-bolt type expansive self-stress grouting hoop - Google Patents

Abstract

The utility model relates to the repair and reinforcement of marine structures, in particular to a short-bolt type expansion self-stress grouting clamp. Including the upper clamp and the lower clamp, the upper clamp includes the upper saddle plate and the upper flange, the lower clamp includes the lower saddle plate and the lower flange, the upper saddle plate and the lower saddle plate are semicircular tubular, the upper saddle plate and the lower An axial annular cavity for placing damaged pipe fittings is formed between the saddle plates, the upper flange and the lower flange are arranged along the axial sides of the clamp, and the flange and the lower flange are fixed by short bolts Connection, short bolts are arranged at intervals along the upper flange and the lower flange, an axial seal is provided between the upper flange and the lower flange, and an end face sealing ring is provided on the axial end face of the upper clamp and the lower clamp, and the end face seal There is a pressure plate on the outer side of the ring, and the end face sealing ring is fixedly connected with the ring baffle through the fixing bolts, the pressure plate and the annular baffle. Its structure is simple, light in weight, large manufacturing tolerance is allowed, underwater construction is convenient, and it has good durability and load-bearing capacity, and is suitable for the repair and reinforcement of marine structures.

Description

Short Bolt Type Expansion Self-stressing Grouting Clamp

technical field

The utility model relates to the repair and reinforcement of marine structures, in particular to a short bolt type expansion type self-stress grouting clamp.

Background technique

At present, during the use of offshore platform pipe fittings and submarine pipelines, due to fatigue or corrosion, there will be a certain degree of damage after long-term use. In order to ensure their normal operation, offshore platform pipe fittings and submarine pipelines need to be repaired and reinforced. Since the damage occurred underwater, wet welding was difficult, making repairs difficult.

Utility model content

The purpose of this utility model is to propose a short bolt type expansion type self-stressing grouting clamp, which has a simple structure, light weight, allows large manufacturing tolerances, is convenient for underwater construction, has good durability and bearing capacity, and is suitable for marine applications. Repair and reinforcement of structures.

The utility model is realized by adopting the following technical solutions: a short-bolt type expansion self-stress grouting hoop, including an upper hoop and a lower hoop, wherein the upper hoop includes an upper saddle plate and an upper flange, The lower clamp includes a lower saddle plate and a lower flange. Both the upper saddle plate and the lower saddle plate are in the shape of a semicircular tube. An axial annular cavity for placing damaged pipe fittings is formed between the upper saddle plate and the lower saddle plate. The upper Both the flange and the lower flange are arranged along the axial sides of the clamp, the upper flange is welded to the lower end face of the upper saddle plate, the lower flange is welded to the upper end face of the lower saddle plate, the upper flange and the lower flange They are fixedly connected by short bolts. The short bolts are arranged at intervals along the upper flange and the lower flange. The bottom of the lower clamp is provided with a slurry inlet, and the top of the upper clamp is provided with a slurry outlet. Both communicate with the annular inner cavity between the upper saddle plate and the lower saddle plate, and there is an annular gap between the damaged pipe fittings and the inner walls of the upper saddle plate and the lower saddle plate, and the annular gap is filled with a grouting layer mixed with expansion agent. There is an axial seal between the upper flange and the lower flange, and an end face sealing ring is provided on the axial end faces of the upper clamp and the lower clamp. The end face sealing ring is located outside the grouting layer, and the end face sealing ring and the grouting layer An annular baffle is provided, and the annular baffle is welded on the inner surface of the upper saddle plate and the lower saddle plate, and a pressure plate is arranged outside the end face sealing ring, and the end face sealing ring is fixedly connected with the annular baffle through fixing bolts, the pressure plate and the annular baffle.

In the utility model, the short bolt runs through the upper flange, the axial seal and the lower flange, and one end of the short bolt is provided with a nut, and between the upper flange and the nut, as well as between the lower flange and the bolt head, With gaskets, the axial seal is fixed between the upper and lower flanges by short bolts, nuts and washers.

The annular baffle includes an upper annular baffle and a lower annular baffle, there is a radial gap between the annular baffle and the damaged pipe, there is a gap between the upper annular baffle and the lower annular baffle, and the annular baffle is provided for The threaded holes for fixing the sealing ring at the end are evenly spaced along the circumferential surface of the annular baffle.

The end face seal ring includes an upper end face seal ring and a lower end face seal ring, the upper end face seal ring and the lower end face seal ring are in the shape of a semicircle, and there is no radial direction between the upper end face seal ring, the lower end face seal ring and the damaged pipe fitting. There is a gasket layer between the upper end face seal ring and the lower end face seal ring.

The beneficial effects of the utility model are: the clamp is simple and compact in structure, light in weight, and its steel structure weight is reduced by more than 30% compared with the long bolt clamp of the same reinforced pipe size; the axial sealing structure of the short bolt makes the grouting expansion pressure more uniform , the axial sliding bearing capacity of the clamp is more than 20% higher than that of the long bolt clamp with the same reinforced pipe size; the underwater construction is convenient, the construction cost is low, and the safety of the underwater construction is also improved, and it has good durability and Bearing capacity, suitable for repair and reinforcement of marine structures.

Description of drawings

Fig. 1 is the front sectional view of the utility model;

Figure 2 is a partial enlarged view of the short bolt connection;

Fig. 3 is a top sectional view of the utility model;

Fig. 4 is a schematic diagram of an end face sealing annular baffle;

Fig. 5 is a schematic diagram of an end face sealing ring.

In the figure: 1 upper clamp; 2 slurry outlet; 3 upper saddle plate; 4 upper flange; 5 lower flange; 6 lower saddle plate; 7 slurry outlet; 8 lower clamp; 9 grouting layer; 10 damaged Pipe fittings; 11 short bolts; 12 nuts; 13 fixing bolts; 14 end face sealing ring; 15 ring baffle; 16 axial seal;

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

Fig. 1 to Fig. 3 are the short bolt type expansion type self-stressing grouting hoop described in the utility model, comprise upper hoop 1 and lower hoop 8, upper hoop includes upper saddle plate 3 and upper flange 4, lower hoop The hoop includes a lower saddle plate 6 and a lower flange 5. Both the upper saddle plate 3 and the lower saddle plate 6 are in the shape of a semicircular tube, and an axial space for placing a damaged pipe 10 is formed between the upper saddle plate 3 and the lower saddle plate 6. Ring cavity. The upper flange 4 and the lower flange 5 are arranged along the axial sides of the clamp, the upper flange 4 is welded to the lower end surface of the upper saddle plate 3 , and the lower flange 5 is welded to the upper end surface of the lower saddle plate 6 . The upper flange 4 and the lower flange 5 are fixedly connected by short bolts 11 , and the short bolts 11 are arranged at intervals along the upper flange 4 and the lower flange 5 .

The bottom of the lower clamp 8 is provided with a slurry inlet 7, and the top of the upper clamp 1 is provided with a slurry outlet 2, the slurry inlet 7 and the slurry outlet 2 are connected to the annular space between the upper saddle plate 3 and the lower saddle plate 6 The inner cavity communicates, and there is an annular gap between the damaged pipe fitting 10 and the inner walls of the upper saddle plate 3 and the lower saddle plate 6, and the annular gap is filled with a grouting layer 9 mixed with an expansion agent. An axial seal 16 is arranged between the upper flange 4 and the lower flange 5, and the short bolt 11 runs through the upper flange 4, the axial seal 16 and the lower flange 5, and one end of the short bolt 11 is provided with a nut 12, the upper method A gasket 17 is provided between the flange 4 and the nut, and between the lower flange 5 and the bolt head, and the axial seal 16 is fixed on the upper flange 4 and the lower flange by short bolts 11, nuts 12 and gaskets 17 5, used to prevent grouting from leaking. Both axial end surfaces of the upper clamp 1 and the lower clamp 8 are provided with end face sealing rings 14 , and the end face sealing rings 14 are located outside the grouting layer 9 . The end face seal ring 14 includes an upper end face seal ring and a lower end face seal ring, both of which are in the shape of a semicircle, and there is no gap between the upper end face seal ring, the lower end face seal ring and the damaged pipe fitting 10. For the radial gap, a gasket layer 19 is provided between the upper end sealing ring and the lower end sealing ring, which is used to prevent the grouting leakage gap between the upper end sealing ring and the lower end sealing ring in the circumferential direction. An annular baffle 15 is arranged between the end face sealing ring 14 and the grouting layer 9. The annular baffle 15 includes an upper annular baffle and a lower annular baffle, and the upper annular baffle and the lower annular baffle are respectively welded on the upper saddle and the lower saddle. the inner surface of the board. There is a radial gap between the annular baffle 15 and the damaged pipe 10 in the radial direction, there is a gap between the upper annular baffle and the lower annular baffle, and a threaded hole for fixing the end sealing ring 14 is opened on the annular baffle 15 , the threaded holes are evenly spaced along the circumferential surface of the annular baffle 15 . A pressure plate 18 is provided on the outside of the end face sealing ring 14, and the end face sealing ring 14 is fixedly connected with the annular baffle plate 15 through the fixing bolts 13 and the pressure plate 18 to prevent grouting from leaking.

Claims (4)

1. a lag bolt type expansion is from the stress technique of grouted clamp, comprise front band (1) and lower catch hoop (8), it is characterized in that: described front band comprises saddle plate (3) and upper flange (4), lower catch hoop comprises lower saddle plate (6) and lower flange (5), upper saddle plate (3) and lower saddle plate (6) all are the semicircle tubulose, form one between upper saddle plate (3) and lower saddle plate (6) and axial be used for placing the annular cavity of impaired pipe fitting (10), upper flange (4) and lower flange (5) all arrange along the axial both sides of clip, upper flange (4) is welded to connect with the lower end surface of upper saddle plate (3), lower flange (5) is welded to connect with the upper end of lower saddle plate (6), be fixedly connected with by lag bolt (11) between upper flange (4) and lower flange (5), lag bolt (11) is along upper flange (4) and lower flange (5) interval setting, the bottom of lower catch hoop (8) is provided with pulp inlet (7), the top of front band (1) is provided with grout outlet (2), pulp inlet (7) and grout outlet (2) all with upper saddle plate (3) and lower saddle plate (6) between annular cavity be communicated with, there is the annular space between the inwall of impaired pipe fitting (10) and upper saddle plate (3) and lower saddle plate (6), be filled with the grout blanket (9) that is mixed with dilatant in this annular space, be provided with axial seal (16) between upper flange (4) and lower flange (5), the axial end of front band (1) and lower catch hoop (8) is provided with end-face seal ring (14), end-face seal ring (14) is positioned at the outside of grout blanket (9), be provided with ring baffle (15) between end-face seal ring (14) and grout blanket (9), ring baffle (15) is welded on the internal surface of saddle plate and lower saddle plate, the outside of end-face seal ring (14) is provided with pressing plate (18), end-face seal ring (14) is by fixing bolt (13), pressing plate (18) is fixedly connected with ring baffle (15).

2. lag bolt type expansion according to claim 1 is from the stress technique of grouted clamp, it is characterized in that: described lag bolt (11) runs through upper flange (4), axial seal (16) and lower flange (5), one end of lag bolt (11) is provided with nut (12), be equipped with pad (17) between upper flange (4) and nut and between lower flange (5) and bolt head, described axial seal (16) is fixed between upper flange (4) and lower flange (5) by lag bolt (11), nut (12) and pad (17).

3. lag bolt type expansion according to claim 1 is from the stress technique of grouted clamp, it is characterized in that: described ring baffle (15) comprises ring baffle and lower ring baffle, there is radial clearance between ring baffle (15) and impaired pipe fitting, there is the gap between upper ring baffle and lower ring baffle, ring baffle (15) is provided with the tapped hole for the anchor portion seal ring, and tapped hole is along the even interval setting of the circumferential surface of ring baffle.

4. lag bolt type expansion according to claim 1 is from the stress technique of grouted clamp, it is characterized in that: described end-face seal ring (14) comprises upper-end surface seal ring and lower end surface seal ring, upper-end surface seal ring and lower end surface seal ring all are the semicircular ring shape, without radial clearance, be provided with sealing bed course (19) between upper-end surface seal ring and lower end surface seal ring between upper-end surface seal ring and lower end surface seal ring and impaired pipe fitting (10).

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