CN210767508U - Grout sleeve's insert end structure and grout sleeve - Google Patents

Abstract

The utility model provides a grout sleeve insert end structure and grout sleeve. The utility model discloses a grout sleeve insert end structure integrated into one piece in the grout sleeve's of by tubular product structure one end or both ends to make the reinforcing bar insert form the connection among the grout sleeve. The insertion end of the structure is integrally connected with the anchoring section of the grouting sleeve, and an annular pressing part is formed at the part of the anchoring section connected with the insertion end; the annular pressing part is provided with more than three pressing dents which are arranged on the outer peripheral surface of the anchoring section at intervals; inner wall bulges are formed on the inner peripheral surface of the anchoring section corresponding to the pressing dents; the inserting end is smoothly connected with the inner surface of the anchoring section at the bulge of the inner wall; the insertion end is in a bell mouth shape with gradually increased radial dimension, and the end face dimension of the port of the insertion end is kept with the original radial dimension of the pipe. The utility model discloses a telescopic inserting end structure of grout is favorable to the reinforcing bar to inserting the butt joint when grout sleeve and leading-in the same direction as smooth.

Description

Grout sleeve's insert end structure and grout sleeve

Technical Field

The utility model relates to a building engineering technical field, in particular to grout sleeve insert end structure. Furthermore, the utility model discloses still relate to a grout sleeve.

Background

Nowadays, in the field of construction engineering, fabricated concrete structures are one of the main structural types of buildings. The prefabricated concrete member is a main member of the prefabricated house, and the prefabricated member is a finished concrete member manufactured in factory by a member processing unit, and is assembled, connected and partially cast in situ to form a reinforced concrete frame structure of a building body on a construction site. For prefabricated parts, the connection quality of the nodes of the steel bars plays a decisive role in the safety of the structure, and the vertical connection of the assembled concrete shear wall and the frame structure in China is mostly realized by connecting the inserted steel bars through grouting sleeves.

The grouting sleeve can be divided into machining and casting according to the processing technology. The insertion end of the sleeve is machined by adopting a metal bar material, so that the raw material waste is high, and the machining process is complex. In the casting process, the spheroidization rate of the nodular cast iron is required to be ensured to be more than or equal to 85%, and the index is not easy to control in factory manufacturing, so that the performance stability of the product is poor, and the nodular cast iron is easy to crack under the conditions of fatigue and resonance.

When the prefabricated part is prefabricated in a factory, the central axis of the steel bars in the sleeve is required to be coincident with the central axis of the sleeve, and the anchoring section of the grouting sleeve is required to be tightly fixed with the fixed template to form a grouting sleeve assembly, so that the position of the grouting sleeve body is ensured not to move in the grouting manufacturing process, and the grouting sleeve in the prefabricated part is required to be aligned with all the steel bars in the main body structure to be inserted and smoothly installed in place when the prefabricated part is hoisted on site. The national construction industry standard grouting sleeve JG/T398-2012 for connecting reinforcing steel bars specifies that: the difference between the minimum inner diameter size of the anchoring section of the grouting sleeve and the diameter of the steel bar is 10mm or more, and is limited by the existing processing technology and design method, the difference between the size of the port at the insertion end of the grouting sleeve and the nominal diameter of the steel bar is 10-12mm, however, in the construction process, the steel bars at the stress nodes are dense, the connection structure is complex, the reinforcement arrangement amount is large, the use amount of the sleeve is large, and the problems that the steel bar is difficult to insert into the sleeve, the construction difficulty is large, and the construction progress and quality are difficult to guarantee exist in the grouting sleeve when the prefabricated part is installed on site.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a grout sleeve inserts end structure to an insert end structure of grout sleeve convenient to integrative structure processing is favorable to the reinforcing bar to the mouth and leading-in the same direction as smooth when inserting grout sleeve.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

an insertion end structure of a grouting sleeve is integrally formed at one end or two ends of the grouting sleeve constructed by a pipe material so as to enable a reinforcing steel bar to be inserted into the grouting sleeve to form connection, the insertion end structure of the grouting sleeve is provided with an insertion end, the insertion end is integrally connected with an anchoring section on the grouting sleeve, and an annular pressing part is constructed at a position, connected with the insertion end, on the anchoring section;

the annular pressing part is provided with eight pressing dents (3011) which are uniformly distributed on the outer peripheral surface of the anchoring section (3) at intervals; inner wall bulges are formed on the inner peripheral surface of the anchoring section corresponding to the pressing dents;

the insertion end is smoothly connected with the inner surface of the anchoring section at the bulge of the inner wall; and the direction of keeping away from the anchoring section along the axis of the anchoring section, the insertion end is in a bell mouth shape with gradually increased radial dimension, and the end face dimension of the port of the insertion end is kept with the original radial dimension of the pipe.

Further, the minimum inner diameter D2 of the annular pressing part and the original inner diameter D1 of the pipe meet the following conditions: 0.82D1 is not less than D2 is not less than 0.9D 1.

Further, in the axial direction of the grouting sleeve, the length L from the center position of the annular press-in portion to the end surface of the port satisfies: 2.5(D2-D1) ≥ L ≥ 2 (D2-D1).

Compared with the prior art, the utility model discloses following advantage has:

(1) grout sleeve's insert end structure, through the forging and pressing processing to customization tubular product, an organic whole constructs out and inserts the end, is fit for forging and pressing processing structure integratively, and is favorable to the reinforcing bar to mouthful and leading-in the same direction as smooth when inserting grout sleeve.

(2) The pressing dents on the same annular pressing part are uniformly arranged into eight at intervals to form the section of the annular pressing part similar to a regular octagon, so that under the condition of adopting the pressing depth of the smaller annular pressing part, a sufficient stress area is formed on the annular pressing part, the processing and the construction are convenient, and the anchoring performance of the anchoring section is reliable.

(3) The size proportion of the minimum inner diameter of the annular pressing-in part and the original inner diameter of the pipe is limited, so that the pressing-in depth of the annular pressing-in part is suitable for the radial size of the sleeve, and the anchoring mechanical property of the anchoring section to the inserted steel bar after grouting solidification is ensured.

(4) By limiting the relation between the length from the annular pressing part to the end face of the port and the radial dimension of the pipe, the inner diameter of the end face of the port is ensured to basically keep the original inner diameter dimension of the pipe, and the effective length of the anchoring section is increased to the maximum extent.

Another object of the utility model is to provide a grout sleeve, including the anchor section that is located the middle section, be close to the both ends of anchor section be provided with grout mouth and gas vent on the pipe wall of anchor section respectively, in the one end or the both ends integrated into one piece of anchor section construct the shaping have the telescopic insertion end structure of grout.

Furthermore, a plurality of annular press-in parts are arranged on the anchoring section at intervals along the axial direction of the grouting sleeve, a shearing force part is formed between every two adjacent annular press-in parts, and a shearing force groove is formed in the shearing force part.

Furthermore, when the steel bar is inserted into the grouting sleeve, a stop piece arranged on the anchoring section is transversely arranged on a path through which the steel bar passes, so that the steel bar is prevented.

Furthermore, the annular pressing parts which are positioned between the grouting opening and the stop part and between the exhaust opening and the stop part are uniformly arranged.

Compared with the prior art, the utility model provides a grout sleeve is convenient for integrative extrusion structure processing, and is favorable to the reinforcing bar to cut in the same direction as mouthful and smoothly leading-in when inserting grout sleeve. And through extrusion play annular portion of impressing and shear force groove on the anchor section, make the utility model discloses a grout sleeve more is suitable for a body ground forging and pressing processing, and the inner chamber is in the same direction as smooth, does benefit to twisted steel's smooth insertion, has reduced the possibility that the jamming appears when the reinforcing bar inserts.

Drawings

The accompanying drawings, which form a part of the present disclosure, are provided to provide a further understanding of the present disclosure, and the exemplary embodiments and descriptions thereof are provided to explain the present disclosure, wherein the related terms in the front, back, up, down, and the like are only used to represent relative positional relationships, and do not constitute an undue limitation of the present disclosure. In the drawings:

fig. 1 is a schematic view of an overall structure of an insertion end structure of a grouting sleeve used for a full grouting sleeve according to a first embodiment of the present invention;

FIG. 2 is an axial cross-sectional view of FIG. 1;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 4 is a view from direction B shown in FIG. 1;

fig. 5 is a schematic view of an overall structure of an insertion end structure of a grouting sleeve according to a second embodiment of the present invention, which is used for a half grouting sleeve;

FIG. 6 is an axial cross-sectional view of FIG. 5;

description of reference numerals:

1-insertion end, 101-port;

2-a screwed end, 201-a threaded hole;

3-anchoring section, 301-annular pressing-in part, 3011-pressing-in dent, 3012-inner wall protrusion, 302-shearing part, 3021-shearing groove, 303-grouting port, 304-exhaust port;

4-stop bolt.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

The utility model provides an insert end structure of grout sleeve, integrated into one piece is in the grout sleeve's of tubular product structure one end or both ends for the reinforcing bar by grout sleeve connection inserts, and the insert end of this structure links to each other with grout sleeve's anchor section is integrative, connects the position of inserting the end on the anchor section, constructs annular portion of impressing; the annular pressing part is provided with more than three pressing dents which are arranged on the outer peripheral surface of the anchoring section at intervals; inner wall bulges are formed on the inner peripheral surface of the anchoring section corresponding to the pressing dents; the inserting end is smoothly connected with the inner surface of the anchoring section at the bulge of the inner wall; the insertion end is in a bell mouth shape with gradually increased radial dimension, and the end face dimension of the port of the insertion end is kept with the original radial dimension of the pipe.

The utility model discloses a grout sleeve inserts the end structure, the integrative structure processing of being convenient for, and be favorable to the reinforcing bar to the mouth when inserting grout sleeve and leading-in with the same direction as smooth.

Example one

Based on the above general inventive concept, the insertion end structure of the grout sleeve of the present embodiment is applied to a full grout sleeve, and an exemplary structure of the full grout sleeve is shown in fig. 1, which mainly includes an anchoring section 3 and insertion ends 1 at both ends of the anchoring section 3.

In this embodiment, the fully grouted sleeve is manufactured by integrally forging and pressing the customized pipe. First, the anchor segment 3 is press-molded with the annular press-fitting portion 301 and the shearing portion 302, and the insertion end 1 is integrally formed at both ends of the anchor segment 3. An annular pressing part 301 is extruded and formed on the anchoring section 3 at the part which is jointed with the insertion end 1 to form a boundary between the insertion end 1 and the anchoring section 3; and a grouting opening 303 and an exhaust opening 304 are respectively arranged on the pipe wall of the anchoring section 3 close to the two ends of the anchoring section 3 and are used for connecting grouting and exhaust after the steel bar is installed.

As shown in figures 1 and 2, the annular pressed part 301 closest to the insertion end 1 is used as a boundary of the anchoring section 3 and the insertion end 1, the radial dimension of the insertion end 1 is gradually increased towards the direction far away from the anchoring section 3 along the axis, and the radial dimension D of the port 101 of the insertion end 1 is kept the original dimension of the customized pipe so as to facilitate the mouth-to-mouth entry and insertion guide during the insertion of the steel bar.

As shown in fig. 3, each annular pressing portion 301 includes more than three pressing dents 3011 formed on the outer surface of the tube wall by extrusion; and, the respective press-in indents 3011 of the same annular press-in portion 301 are arranged at intervals on a circle where a plane perpendicular to the axis of the anchor section 3 intersects the pipe wall; inner wall protrusions 3012 are formed on the inner surface of the tube wall corresponding to the respective press-in indentations 3011.

Fig. 4 shows a structural schematic of a view from the port 101 side of the sleeve. The insertion end 1 and the anchoring section 3 are respectively opened by the annular pressed-in part 301 in response to the extrusion forming of the annular pressed-in part 301 closest to the insertion end 1, the annular pressed-in part 301 forms the deformation of the pipe wall, and transitional deformation belts are formed on two sides of the annular pressed-in part 301, so that the joint part of the insertion end 1 and the anchoring section 3 in the sleeve presents a smooth transitional cambered surface at the position of the annular pressed-in part 301; the insertion end 1 is in the form of a bell mouth with a gradually increasing radial dimension in the axial direction away from the anchoring section 3.

The length from the center position of the annular pressing part 301 to the end face of the port 101 is set to be L, and the reasonable L size is set, so that the end face size of the port 101 of the insertion end 1 can keep the original radial size of the pipe, and the reinforcing steel bar can have the optimal opposite insertion condition.

The insertion end structure of the grouting sleeve adopting the processing mode can be integrally processed and formed on the customized metal pipe by assembling a special die by using special forging equipment or hydraulic equipment, and for example, the customized seamless steel pipe can be processed and manufactured as a base material.

The press-in indents 3011 on the same annular press-in portion 301 are three or more, which can prevent the section of the annular press-in portion 301 from forming a flat ellipse, so that the area of the section is large, and the steel bar can pass through the press-in indents when inserted. It is more preferable that the press-fitting indents 3011 on the same annular press-fitting portion 301 are arranged in eight at regular intervals, so that the annular press-fitting portion 301 has an approximately regular octagonal shape in a cross section perpendicular to the axis. By adopting the design, under the condition of adopting smaller press-in depth of the annular press-in part 301, enough stress area can be formed on the annular press-in part 301, so that the anchoring performance of the anchoring section 3 is reliable; and the cross section of the annular pressed portion 301 is made to have a regular shape and a large area, facilitating the insertion of the reinforcing bars therethrough.

In actual extrusion processing, a special die for hydraulic equipment assembly can be adopted to process the metal pipe at normal temperature, eight die blocks with the width larger than 2mm can be selected for use, and the length and the width of each die block can be selected and matched according to the original outer diameter D of the processed pipe. One preferred size set is: the length of the die block is more than or equal to 0.15D and more than or equal to 0.25D; the length of the die block is more than or equal to 0.35 and the width of the die block is more than or equal to 0.25. The shape of the extrusion surface of the die block can be rectangular, preferably, the shape is approximately rectangular with the concave middle part, and in the extrusion direction, the middle part of the extrusion surface is convex relative to two ends.

The eight die blocks are symmetrically distributed on the periphery circle of the pipe to extrude the pipe, so that the stress of the pipe is balanced, and the safety in the processing process is facilitated.

In order to provide favorable conditions for the insertion of the reinforcing steel bar on the basis of reliable anchoring mechanical properties, the pressing depth of the annular pressing portion 301 should be matched with the radial dimension of the sleeve. Preferably, the minimum inner diameter D2 of the annular pressed portion 301 and the original inner diameter D1 of the tube are defined as: d2 is more than or equal to 0.85D1 and less than or equal to 0.9D 1; that is, the pressing depth of the annular pressing part 301 should be between 0.1D1 and 0.15D 1.

In order to maintain the inner diameter of the end face of the port 101 substantially equal to the original inner diameter of the pipe and to increase the effective length of the anchoring section 3 to the maximum, the length L of the insertion end 1 is set as follows in the axial direction of the grouting sleeve: 2.5(D2-D1) ≥ L ≥ 2 (D2-D1). The insertion end 1 of the grouting sleeve obtained according to the setting has the end surface inner diameter of the port 101 capable of keeping the original inner diameter of the pipe, and the L size is smaller, so that the length of the anchoring section 3 is effectively increased.

Further, as shown in fig. 1 and 2, the same plurality of annular indents 301 may be configured on the anchor segments 3, which are arranged to be spaced apart along the axial direction of the anchor segments 3. In response to the molding of the annular pressed portions 301, shear portions 302 are formed between every two adjacent annular pressed portions 301 inside the anchor segments 3, shear grooves 3021 are formed inside the shear portions 302, and the junction of the shear grooves 3021 and the annular pressed portions 301 has a smooth transition curved surface. Compared with the traditional sleeve, the structure of the annular pressing-in part 301 ensures that the inner cavity of the sleeve has no step dead angle, and when the sleeve is grouted, the bubbles in the grouting material can smoothly overflow along the smooth transition surface of the inner wall of the sleeve, so that the bubbles in the sleeve can be completely discharged before the grouting material is solidified, and the connection mechanical property of the grouting sleeve is improved.

Similarly, in order to make the transition of the joint between the shear groove 3021 and the annular pressed portion 301 smoother, and to make the inner diameter of the middle portion of the shear groove 3021 substantially maintain the original inner diameter dimension of the pipe, so that the anchoring performance of the shear groove 3021 is better, the distance between two adjacent annular pressed portions 301 on the anchoring section 3 can be set with reference to the double L dimension.

Furthermore, a grout port 303 is provided on the tube wall adjacent to the shear portion 302 of the insertion end 1, and a vent port 304 is provided on the tube wall adjacent to the shear portion 302 at the other end; accordingly, the length L of the shear portion 302 can be increased according to the drilling requirements of the grouting port 303 and the air outlet 304. The arrangement is convenient to process and can obtain better grouting effect. The annular pressing parts 301 between the grouting opening 303 and the exhaust opening 304 can be arranged at even intervals, which is not only beneficial to processing and manufacturing, but also enables the anchoring stress of the anchoring section 3 to be more balanced.

In order to make the insertion depth of the inserted steel bars reasonable and to operate in construction, a stopper may be provided at a position near the middle of the anchoring section 3, as shown in fig. 1 and 2. Preferably, the stop bolt 4 is used, and the stop bolt 4 is installed by machining a through hole which is transverse to the axis on the pipe wall of the shearing part 302 of the section, so that the stop bolt can play a role in stopping and positioning when the steel bar is inserted. Accordingly, the length L of the section of the shear portion 302 can be set to be increased according to the drilling requirement of the stop bolt 4.

The following table lists the gauge dimensions of the custom-made tubing for a conventional gauge grout sleeve and gives the corresponding tooling dimensional data for the annular indention 301 in the insert end construction. The dimensions defined above and provided in the table below are all obtained by tests and experiments, and are superior dimensions under the condition of meeting the requirement of anchoring mechanical property of the insertion end structure of the grouting sleeve.

The inserting end structure of the grouting sleeve of the embodiment integrally constructs the inserting end 1 through forging and pressing the customized pipe, is suitable for integrally forging and pressing a structure, and is favorable for aligning and smoothly guiding when the reinforcing steel bar is inserted into the grouting sleeve.

Example two

Based on the same inventive concept, the insertion end structure of the grout sleeve of the present embodiment is applied to a half grout sleeve, and an exemplary structure of the half grout sleeve is shown in fig. 5, which mainly includes an insertion end 1, a bolt end 2 and an anchoring section 3.

In this embodiment, the half-grouting sleeve is manufactured by integrally forging and pressing the customized pipe. In addition to the structure of the insertion end 1 and the anchoring section 3, the structure of the grouting port 303 and the exhaust port 304 as described in the first embodiment, a screw-connection end 2 with a gradually reduced outer diameter is formed by forging and pressing at the other end of the anchoring section 3.

The screw-in end 2 is constructed as shown in fig. 5 and 6. The screw joint end 2 is in a closing-up shape with the radial size gradually reduced along the axial line towards the direction far away from the anchoring section 3, and a screw hole 201 for screwing the reinforcing steel bar is arranged at the convoluted axial line part of the screw joint end 2. The screw joint end 2 is in a closed-up shape, is suitable for an integrated forging and pressing structure on the customized pipe, is convenient to process and manufacture, and is convenient for screwing in and mounting the reinforcing steel bars by processing a threaded hole 201 in the middle of the screw joint end 2.

In this embodiment, the structures of the insertion end 1, the anchoring section 3, and the shearing portion 302 of the half grouting sleeve and the annular pressing portion 301 are the same as those described in the first embodiment, and are not described herein again.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. The utility model provides a grout sleeve inserts end structure, integrated into one piece in the grout sleeve's of by tubular product structure one end or both ends to make the reinforcing bar insert form the connection in the grout sleeve, its characterized in that: the inserting end structure of the grouting sleeve is provided with an inserting end (1), the inserting end (1) is integrally connected with an anchoring section (3) on the grouting sleeve, and a ring-shaped pressing part (301) is formed at the part of the anchoring section (3) connected with the inserting end (1);

the annular pressing part (301) is provided with eight pressing dents (3011) which are uniformly distributed on the outer peripheral surface of the anchoring section (3) at intervals; inner wall protrusions (3012) are formed on the inner peripheral surface of the anchoring section (3) corresponding to the press-in dents (3011);

the insertion end (1) is smoothly connected with the inner surface of the anchoring section (3) at the inner wall bulge (3012); and the direction of keeping away from the anchoring section (3) along the axis of the anchoring section (3), the inserting end (1) is in a bell mouth shape with gradually increased radial dimension, and the end surface dimension of the port (101) of the inserting end (1) is kept with the original radial dimension of the pipe.

2. The insert end structure of a grout sleeve of claim 1, wherein: the minimum inner diameter D2 of the annular pressing part (301) and the original inner diameter D1 of the pipe material meet the following conditions: 0.82D1 is not less than D2 is not less than 0.9D 1.

3. The insert end structure of a grout sleeve of claim 2, wherein: in the axial direction of the grouting sleeve, the length L of the central position of the annular pressing part (301) from the end surface of the port (101) satisfies the following condition: 2.5(D2-D1) ≥ L ≥ 2 (D2-D1).

4. The utility model provides a grout sleeve, is including anchor section (3) that are located the middle section, in be close to the both ends of anchor section (3) be provided with grout mouth (303) and gas vent (304) on the pipe wall of anchor section (3) respectively, its characterized in that: integrally constructed at one or both ends of the anchoring section (3) is a plug-in end structure of a grout sleeve according to any one of claims 1-3.

5. A grout sleeve according to claim 4, wherein: along the axial direction of the grouting sleeve, a plurality of annular press-in parts (301) are arranged on the anchoring section (3) at intervals, a shearing force part (302) is formed between every two adjacent annular press-in parts (301), and a shearing force groove (3021) is formed inside the shearing force part (302).

6. A grout sleeve according to claim 5, wherein: when the reinforcing steel bar is inserted into the grouting sleeve, a stop piece arranged on the anchoring section (3) is transversely arranged on a path through which the reinforcing steel bar passes so as to form a stop for the reinforcing steel bar.

7. A grout sleeve according to claim 6, wherein: the annular pressing parts (301) positioned between the grouting opening (303) and the stop member and between the exhaust opening (304) and the stop member are uniformly arranged.

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