CN205712752U - A kind of grout sleeve and prefabricated component - Google Patents

Abstract

This utility model belongs to building engineering field, specifically disclose a kind of grout sleeve and prefabricated component, described grout sleeve includes sleeve body, described sleeve body is provided with grouting mouth and air vent, described sleeve body both ends open, being provided with fixture in the middle part of described sleeve body inner chamber, the internal diameter of described sleeve body is gradually reduced to middle part by two ends, and the inwall of described sleeve body is by the corrugated extension of inward at both ends.This utility model can realize reinforcing bar and the most axially controls and radially position, it is ensured that the positioning precision between reinforcing bar and grout sleeve；Use undulatory inwall, on the one hand, owing to tapering in the middle part of the interior radial direction of sleeve body, it is unfavorable for that grouting material flows to middle part, and undulatory inwall can ensure that grouting material has enough flowing spaces and the effect of water conservancy diversion grouting material, can be effectively improved Grouted density, on the other hand, the concavity and convexity of inwall can be effectively increased, and then increase the gmatjpdumamics between grouting material and sleeve, improve the anchoring strength of reinforcing bar.

Description

A grouting sleeve and prefabricated parts

technical field

The utility model belongs to the field of construction engineering, in particular to a grouting sleeve and a prefabricated part.

Background technique

In the traditional cast-in-place concrete structure, the steel bars are often connected by mechanical connection methods such as lap joints, welded joints or extrusion sleeves. The construction of the steel bar connection is relatively complicated, and the steel bar connection must be completed before pouring the concrete, which cannot The connection of steel bars between prefabricated parts makes it impossible to carry out prefabricated construction.

In the prior art, the steel bar connection between the prefabricated concrete building parts needs to be connected by sleeve grouting. The two connected steel bars are inserted into the metal sleeve and high-performance cement mortar is poured into the gap between the sleeve and the steel bar. After the cement mortar is hardened, the three are embedded with each other to realize the connection of the steel bars. For example, the patent CN 105133795 A discloses a variable-diameter semi-grouting sleeve, which uses a seamless steel pipe as the main pipe, and the inner wall of the main pipe is a concave-convex surface. The upper end of the main pipe is connected to the large diameter end of the conical pipe, and the small diameter The end is connected to one end of the cylindrical tube. A tapered tube is added to the above sleeve to reduce the diameter, so that the grouting sleeve is easy to connect and deform the steel bar so that it is squeezed into close contact with the connected steel bar. However, the setting of the tapered tube in the above-mentioned grouting sleeve makes the inner diameter of this part suddenly smaller. Because the steel bar has a certain rigidity, it is difficult to make the steel bar to be connected on the same straight line, and it is even impossible to extend the steel bar to the end of the sleeve. Inside, there are defects in the force.

To sum up, there is an urgent need to develop a grouting sleeve that can realize the axial control and radial positioning of the steel bar, ensure the positioning accuracy between the steel bar and the grouting sleeve, the force is reasonable, and the grouting density can be effectively improved.

Utility model content

The purpose of this utility model is to provide a grouting sleeve that can realize the axial control and radial positioning of the steel bar, ensure the positioning accuracy between the steel bar and the grouting sleeve, the force is reasonable, and the grouting density can be effectively improved at the same time, and Apply the preform with the grout sleeve.

The above purpose is achieved through the following technical solutions: a grouting sleeve, including a sleeve body, the sleeve body is provided with a grouting port and an exhaust port, the two ends of the sleeve body are open, and the inside of the sleeve body is A fixing piece is provided in the middle of the cavity, the inner diameter of the sleeve body gradually decreases from both ends to the middle, and the inner wall of the sleeve body extends inwards in a corrugated shape from the ends. The internal diameter of the sleeve body described here gradually decreases from both ends to the middle, which means that in the overall trend, the inner diameter gradually decreases from both ends to the middle, which is not completely applicable to the local change of the inner diameter of the sleeve body. It reflects the overall change trend of the inner diameter of the sleeve body. When the grouting sleeve is applied, the grouting sleeve is pre-embedded in the prefabricated part during the production process of the prefabricated part. The pre-embedded steel bar passes through one end of the sleeve body and is connected with the fixing part, and the other end of the sleeve body faces outside the prefabricated part. When the steel bar is connected, the steel bar extends into the inner cavity of the sleeve body. Since the inner diameter of the sleeve body gradually decreases from the end to the middle, after the steel bar enters the inner cavity, the end of the steel bar is restrained by the inner wall of the sleeve body. Move down to the fixing piece until the end of the steel bar is connected with the fixing piece. In this way, during the butt joint process of the steel bar, the sleeve body can achieve precise axial control of the steel bar, realize radial positioning, and ensure the distance between the steel bar and the grouting sleeve. The positioning accuracy between them, under optimal conditions, that is, when the center point of the fixing part is on the center line of the inner cavity of the sleeve body, the steel bars butted at both ends of the sleeve body can be on the same straight line, and the force can be reasonably stressed; at the same time, it can be used The steel bar is located in the center of the inner cavity, so that the thickness of the grouting material around the steel bar remains consistent after grouting, the density of the grouting is improved, and the gripping force of the grouting material on the steel bar is increased. It should be understood that the minimum inner diameter of the inner cavity of the sleeve body should be slightly larger than the diameter of the steel bar.

The corrugated inner wall is used. On the one hand, because the inner diameter of the sleeve body gradually becomes smaller in the middle, it is not conducive to the flow of the grouting material to the middle, and the corrugated inner wall can ensure that the grouting material has enough flow space and the function of diverting the grouting material , can effectively improve the grouting density, on the other hand, can effectively increase the concavo-convexity of the inner wall, thereby increasing the bite force between the grouting material and the sleeve, and improving the anchoring strength of the steel bar.

Further, the bottom of the inner cavity at the end of the sleeve body is provided with an annular protrusion. Since the inner diameter of the sleeve body gradually decreases from the end to the inside, the grouting material tends to overflow to the outer end of the opening during the grouting process, and an annular protrusion is set at the bottom of the inner cavity at the end of the sleeve body, so that the grouting material is not affected. With a certain blocking effect, the grouting material can flow smoothly to the inside of the sleeve body first, which can improve the grouting density.

Further, the inner wall of the sleeve body is provided with an annular groove in the middle. With such setting, the inner diameter of the sleeve body in the middle can be significantly increased to ensure sufficient flow space for the grouting material to flow to the middle, to ensure that the grouting material fills the entire inner cavity, and to improve the grouting density. As the thickness increases, the grip force of the grouting material on the steel bar is increased, forming a reinforced area. In addition, when the grouting material is formed, a grouting layer consistent with the shape of the inner cavity is formed in the inner cavity of the sleeve body, that is, the diameter of the grouting layer at the annular groove is larger than the diameter of the end of the sleeve body, which increases the grouting layer in the sleeve. The ability to resist shear force and the tensile strength of the joint, so the integrity of the joint is better.

Further, the inner diameter of the inner cavity at the annular groove gradually increases from both ends to the middle. Such setting can make the inner diameter of the sleeve body gradually increase from the outside to the inside in the middle part, which is beneficial to guide the grouting material to flow to the middle part, and at the same time ensure enough flow space and improve the grouting density. At the same time, the thickness of this part of the grouting material increases. Increase the grip force of the grouting material on the steel bar to form a reinforced area.

Further, steel petals are provided on the inner wall of the sleeve body. The setting of the steel valve increases the overall rigidity of the sleeve body. Under the premise of satisfying the rigidity, the wall thickness of the sleeve body can be appropriately reduced to save materials. At the same time, in the case of the same outer diameter, the wall thickness is reduced, and the grouting material is increased, so that the grouting is more compact, and the overall bonding performance between the steel bar and the sleeve body is stronger. Preferably, the direction in which the steel flap is arranged is consistent with the axial direction of the inner cavity. In addition, the poured slurry forms a locking structure in the sleeve body that matches the inner space of the sleeve and the steel flap, which greatly improves the anchoring reliability of the steel bar. It should be understood that the steel flap can be cast integrally with the sleeve body, cut and processed, or installed in the inner cavity of the sleeve body during construction and flexibly connected with the sleeve body. Of course, the position of the steel flap does not overlap with the position of the grouting port and the exhaust hole.

Further, more than two steel petals are provided on the inner wall of the sleeve body, preferably, three or four steel petals are symmetrically provided on the inner wall of the sleeve body. The setting of the number of steel petals is mainly determined by the size of the sleeve body. The number of steel petals can be two petals, three petals, etc., so that the adjustment space of the sleeve body is larger.

Further, the distance between the steel petals along the circumference of the inner cavity of the sleeve body is smaller than the diameter of the steel bars to be connected. Such setting prevents the steel bars from being inserted into the seams between the steel flaps when the construction steel bars are butt-jointed, which will make the joint impossible and increase the difficulty of construction.

Further, the steel flap is provided with slurry holes or slurry guide grooves. On the one hand, the setting of the grout hole or the grout guide groove ensures that the grouting material has enough flow space when it flows to the middle, and enriches the entire grouting sleeve; The bonding force between the body and the grouting material is stronger, and the integrity of the grouting material is stronger, thereby effectively increasing the gripping force of the grouting material on the steel bar.

Further, the steel flap is helical. The steel flap adopts a spiral type, which can increase the bite force between it and the grouting material, and at the same time guide the flow of the grouting material to a certain extent, effectively improving the grouting density.

Further, the slurry passing holes or slurry guiding grooves are arranged along the circumference of the sleeve. In this way, the gaps between the steel flaps are communicated through the grout holes or grout guide grooves.

Further, the steel flap is provided with grooves or protrusions. A certain depth of groove or protrusion is set on the steel flap, which can increase the contact area between the steel flap and the grouting material, so as to increase the bite force between it and the grouting material, and make the force transmission between the steel bar and the sleeve more efficient. uniform. It should be understood that the grooves or protrusions can be arranged on the side wall and/or the inner wall of the steel flap, and the grooves or protrusions can be arranged horizontally, vertically or annularly. If a groove is provided, it can be set in the middle of the side wall of the steel flap or at the end of the side wall close to the wall of the sleeve body, especially if the groove is opened at the end of the side wall of the steel flap close to the wall of the sleeve body, the grouting material can be increased. grouting space, and at the same time increase the contact area between the steel flap, the inner wall of the sleeve and the grouting material.

further,. In this way, the connection and fixation of the steel bars on both sides of the sleeve can be guaranteed.

Further, the outer surface of the sleeve body is a rough surface. When the grouting sleeve is used as an embedded part, the outer surface of the sleeve body adopts a rough surface, which increases the anchoring force between the grouting sleeve and the concrete.

Further, the end of the sleeve body is provided with a sealing device, and the sealing device is provided with a penetration hole. Such arrangement prevents the grouting material from overflowing from the end of the sleeve body before setting and hardening. When in use, first pass the steel bar through the piercing hole on the sealing device, seal the steel bar after the butt joint of the steel bar, and then perform the grouting operation.

Further, the sealing device is an elastic sealing ring.

Further, the sealing device is connected with the sleeve body by threads or clips. In this way, the sealing device and the sleeve body form a reliable connection, which can avoid the phenomenon that the sealing device is pushed open due to the impact force of the grouting material and its own gravity during the grouting process.

Further, the two side walls of the sealing device are provided with anchoring protrusions. In this way, the sealing device can form a certain anchoring force with the grouting material on both sides and the cast-in-place layer, and indirectly strengthen the connection between the sleeve body and the two.

Further, the sealing device is a locking sleeve, and the locking sleeve is in interference fit with the inner cavity at the end of the sleeve body, and the locking sleeve is made of mild steel or spring steel. In this way, after the butt joint of the steel bar is completed, the locking sleeve is pushed inward when sealing. Since the inner diameter of the sleeve body gradually decreases from the end to the middle, the locking sleeve is elastically deformed, and then the steel bar is locked tightly. Live, so that the steel bars will not swing during the grouting process.

Further, the end of the locking sleeve is provided with a cutout. Such setting is beneficial to the deformation of the locking sleeve. It should be understood that the cutout can be provided at any one end or both ends of the locking sleeve.

Further, grooves are provided on the inner wall of the sleeve body between the steel flaps. Such setting increases the grouting space and at the same time increases the bite force between the inner wall of the sleeve body and the grouting material, and increases the overall resistance to tensile or shear force of the joint portion of the sleeve body. The groove is preferably arranged in a ring shape, that is, arranged along the circumference of the inner cavity of the sleeve body.

Further, the outer surface of the sleeve body is provided with an annular groove. Such arrangement increases the contact area between the sleeve body and concrete, and increases the anchoring force between the grouting sleeve and concrete.

Further, both ends of the sleeve body are provided with oblique openings. With such arrangement, the diameter of the inner cavity at the end is increased, and at the same time, the bevel can also play a guiding role, which is beneficial to the insertion of steel bars to achieve butt joint.

To achieve the above purpose, the utility model also provides a prefabricated part, the prefabricated part is pre-embedded with pre-embedded steel bars and the grouting sleeve described in any one of the above, and the pre-embedded steel bars are connected with the fixing parts. In this way, the prefabricated part is pre-embedded with a grouting sleeve, which is connected with the protruding steel bars of the prefabricated part to be assembled through the grouting sleeve, and then fixed by grouting to realize the butt joint installation of the prefabricated part.

Description of drawings

The accompanying drawings constituting a part of the utility model are used to provide a further understanding of the utility model, and the schematic embodiments of the utility model and their descriptions are used to explain the utility model, and do not constitute improper limitations to the utility model.

Figures 1 to 5 are front sectional views of the grouting sleeve involved in an embodiment of the present invention;

Figures 6 to 9 are the left side sectional views of the fixing part of the grouting sleeve involved in an embodiment of the present invention;

Fig. 10 is a front sectional view of a grouting sleeve related to another embodiment of the present invention;

Figures 11 and 12 are left side sectional views of the fixing part of the grouting sleeve involved in another embodiment of the present invention;

Figures 13 and 14 are cross-sectional views on the right side of the fixing part of the grouting sleeve involved in another embodiment of the present invention

Fig. 15 is a front sectional view of a grouting sleeve related to another embodiment of the present invention;

Fig. 16 is a schematic structural diagram of a locking sleeve involved in an embodiment of the present invention;

Fig. 17 is a schematic structural diagram of a prefabricated part involved in an embodiment of the present invention;

Fig. 18 is a schematic diagram of the docking state of the prefabricated parts involved in an embodiment of the present invention.

In the picture:

1 Socket body 2 Grout port 3 Vent port 4 Fixing

5 Internal cavity 6 Annular protrusion 7 Annular groove 8 Steel flap

9 Grouting hole 11 Steel flap inner wall 13 Steel bar 14 Grouting material

15 Protrusion 16 Groove 17 Closing device 18 Locking sleeve

19 piercing hole 20 cutout 21 prefabricated part 22 pre-embedded reinforcement

detailed description

The utility model will be described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory, and should not have any limiting effect on the protection scope of the utility model. In addition, those skilled in the art can make corresponding combinations of features in the embodiments in this document and in different embodiments according to the descriptions in this document.

Embodiments of the present utility model are as follows, referring to Fig. 1, a grouting sleeve includes a sleeve body 1, the sleeve body 1 is provided with a grouting port 2 and an exhaust port 3, and the sleeve body 1 is open at both ends , the middle part of the inner cavity 5 of the sleeve body 1 is provided with a fixing part 4, the inner diameter of the sleeve body 1 gradually decreases from both ends to the middle, and the inner wall of the sleeve body 1 extends inwards in a corrugated shape from the end . The inner diameter of the sleeve body 1 described here gradually decreases from both ends to the middle, which means that the inner diameter gradually decreases from both ends to the middle in the overall trend, and it is not completely applicable to the local inner diameter of the sleeve body 1 The change reflects the overall change trend of the inner diameter of the sleeve body 1 . When the grouting sleeve is applied, the grouting sleeve is pre-embedded in the prefabricated part 21 during the production process of the prefabricated part 21, and the pre-embedded steel bar 2213 passes through one end of the sleeve body 1 and is connected with the fixing part 4, and the end of the sleeve body 1 The other end communicates with the outside of the prefabricated part 21. When the steel bar 13 is docked, the steel bar 13 extends into the inner cavity 5 of the sleeve body 1. Since the inner diameter of the sleeve body 1 gradually decreases from the end to the middle, the steel bar 13 enters the inner cavity. After 5, the end of the reinforcing bar 13 moves towards the fixing part 4 under the constraint of the inner wall of the sleeve body 1 until the end of the reinforcing bar 13 is connected with the fixing part 4. In this way, during the butt joint process of the reinforcing bar 13, the sleeve body 1 can Accurate axial control of the steel bar 13, radial positioning, and positioning accuracy between the steel bar 13 and the grouting sleeve, preferably, the center point of the fixing member 4 is at the center of the inner cavity 5 of the sleeve body 1 When it is on the line, the steel bars 13 that are docked at the two ends of the sleeve body 1 can be on the same straight line, and can be reasonably stressed; at the same time, the steel bars 13 can be positioned at the center of the inner cavity 5, so that the grouting material 14 around the steel bars 13 after grouting The thickness remains consistent, the grouting compactness is improved, and the gripping force of the grouting material 14 on the steel bar 13 is increased. It should be understood that the minimum inner diameter of the inner cavity 5 of the sleeve body 1 should be slightly larger than the diameter of the steel bar 13 .

The corrugated inner wall is used. On the one hand, since the inner diameter of the sleeve body 1 gradually becomes smaller in the middle, it is not conducive to the flow of the grouting material 14 to the middle, and the corrugated inner wall can ensure that the grouting material 14 has enough flow space and diversion grouting The effect of the grouting material 14 can effectively improve the grouting compactness. On the other hand, it can effectively increase the concavo-convexity of the inner wall, thereby increasing the bite force between the grouting material 14 and the sleeve, and improving the anchoring strength of the steel bar 13.

On the basis of the above embodiments, in another embodiment of the present invention, as shown in FIG. 2 , the bottom of the inner cavity 5 at the end of the sleeve body 1 is provided with an annular protrusion 6 . Since the inner diameter of the sleeve body 1 gradually decreases from the end to the inside, during the grouting process, the grouting material 14 tends to overflow to the outer end of the opening first, and an annular protrusion 6 is arranged at the bottom of the inner cavity 5 at the end of the sleeve body 1, In this way, the grouting material 14 can be blocked to a certain extent, so that the grouting material 14 can flow smoothly to the inside of the sleeve body 1 first, and the grouting compactness can be improved.

On the basis of the above embodiments, in another embodiment of the present invention, as shown in FIG. 3 , the inner wall of the sleeve body 1 is provided with an annular groove 7 in the middle. With such arrangement, the inner diameter of the sleeve body 1 in the middle part can be significantly increased, so as to ensure that the grouting material 14 has enough flow space when it flows to the middle part, ensures that the grouting material 14 fills the entire inner cavity 5, and improves the grouting density. The thickness of part of the grouting material 14 increases, which increases the gripping force of the grouting material 14 on the steel bar 13, forming a section of reinforcement. In addition, after the grouting material 14 is formed, a grouting layer consistent with the shape of the inner cavity 5 is formed in the inner cavity 5 of the sleeve body 1, that is, the diameter of the grouting layer at the annular groove 7 is larger than the diameter of the end of the sleeve body 1, The ability to resist shear force and the tensile strength of the joint in the sleeve are increased, so the integrity of the joint is better.

On the basis of the above embodiments, in another embodiment of the present invention, as shown in FIG. 4 , the inner diameter of the inner cavity 5 at the annular groove 7 gradually increases from both ends to the middle. Such setting can make the inner diameter of the sleeve body 1 gradually increase from the outside to the inside in the middle part, which is beneficial to guide the grouting material 14 to flow to the middle part, and at the same time ensure enough flow space and improve the grouting compactness. Increase, increase the gripping force of the grouting material 14 on the steel bar 13 to form a section of reinforcement.

On the basis of the above embodiments, in another embodiment of the present invention, as shown in FIG. 5 , a steel flap 8 is provided on the inner wall of the sleeve body 1 . The setting of the steel flap 8 increases the overall rigidity of the sleeve body 1, and under the premise of satisfying the rigidity, the wall thickness of the sleeve body 1 can be appropriately reduced to save materials. At the same time, under the condition of the same outer diameter, the wall thickness is reduced, and the grouting material 14 is increased, so that the grouting is denser, and the overall bonding performance between the steel bar 13 and the sleeve body 1 is stronger. Preferably, the arrangement direction of the steel flap 8 is consistent with the axial direction of the inner cavity 5 . In addition, the poured slurry forms a locking structure in the sleeve body 1 that matches the inner space of the sleeve and the steel flap 8 , which greatly improves the anchoring reliability of the steel bar 13 . It should be understood that, as shown in Figures 6-9, the steel flap 8 can be integrally cast with the sleeve body 1, or can be cut and processed, or can be installed in the inner cavity 5 of the sleeve body 1 during construction, and be integrated with the sleeve body 1. The cylinder body 1 is flexibly connected. Certainly, the position where the steel flap 8 is set does not overlap with the positions where the grouting port 2 and the vent hole are set.

On the basis of the above embodiments, in another embodiment of the present invention, as shown in Figures 6 to 9, the inner wall of the sleeve body 1 is provided with more than two steel petals 8, preferably, the inner wall of the sleeve body 1 Three or four steel petals 8 are arranged symmetrically on the top. The setting of the number of 8 steel petals is mainly determined according to the size of the sleeve body 1. The number of steel petals 8 can be two petals, three petals, etc., so that the adjustment space of the sleeve body 1 is larger.

On the basis of the above embodiments, in another embodiment of the present invention, as shown in FIG. 6 , the distance between the steel flaps 8 along the circumference of the inner chamber 5 of the sleeve body 1 is smaller than the diameter of the steel bars 13 to be connected. Such arrangement prevents the reinforcement bars 13 from being inserted into the seams between the steel flaps 8 when the construction reinforcement bars 13 are docked, and the docking cannot be realized, which increases the difficulty of construction.

On the basis of the above embodiments, in another embodiment of the present invention, as shown in Figures 10 and 11, the steel flap 8 is provided with a slurry hole 9 or a slurry guide groove. On the one hand, the setting of the grout hole 9 or the grout guide groove ensures that the grouting material 14 has enough flow space when it flows to the middle, enriches the entire grouting sleeve, and at the same time, the grouting material 14 in the gap between the steel flaps 8 can be connected into a whole , increase the binding force between the sleeve body 1 and the grouting material 14, and the integrity of the grouting material 14 is stronger, thereby effectively increasing the gripping force of the grouting material 14 on the steel bar 13.

On the basis of the above embodiments, in another embodiment of the present invention, as shown in FIG. 12 , the steel flap 8 is helical. The steel flap 8 adopts a spiral type, which can increase the bite force between it and the grouting material 14, and at the same time guide the grouting material 14 to flow to a certain extent, effectively improving the grouting density.

On the basis of the above embodiments, in another embodiment of the present invention, as shown in Fig. 11 , the grout holes 9 or grout guide grooves are arranged along the circumference of the sleeve. In this way, the gaps between the steel petals 8 are communicated through the grout holes 9 or grout guide grooves.

On the basis of the above embodiments, in another embodiment of the present invention, as shown in Figures 13 and 14 , the steel flap 8 is provided with grooves 16 or protrusions 15 . A groove 16 or a protrusion 15 of a certain depth is set on the steel flap 8, which can increase the contact area between the steel flap 8 and the grouting material 14, so as to increase the bite force between it and the grouting material 14, so that the steel bar 13 and the grouting material 14 The force transmission between the sleeves is more uniform. It should be understood that the groove 16 or the protrusion 15 can be arranged on the side wall and/or the inner wall of the steel flap 8, and the groove 16 or the protrusion 15 can be arranged horizontally, vertically or annularly. If offer groove 16, can be arranged on the middle part of steel petal 8 side wall or side wall close to an end of sleeve body 1 wall, especially groove is opened in steel petal 8 side wall close to an end of sleeve body 1 wall, The grouting space of the grouting material 14 can be increased, and the contact area between the steel flap 8, the inner wall of the sleeve and the grouting material 14 can be increased at the same time.

On the basis of the above embodiments, in another embodiment of the present invention, as shown in FIG. 1 , the fixing member 4 is a threaded connection port or a fixing bolt. In this way, the connection and fixation of the steel bars 13 on both sides of the sleeve can be ensured.

On the basis of the above embodiments, in another embodiment of the present invention, the outer surface of the sleeve body 1 is a rough surface. When the grouting sleeve is used as an embedded part, the outer surface of the sleeve body 1 adopts a rough surface, which increases the anchoring force between the grouting sleeve and the concrete.

On the basis of the above embodiments, in another embodiment of the present invention, as shown in FIG. 15 , the end of the sleeve body 1 is provided with a sealing device 17 , and the sealing device 17 is provided with a penetration hole 19 . Such arrangement prevents the grouting material 14 from overflowing from the end of the sleeve body 1 before setting and hardening. During use, first pass the reinforcing bar 13 through the piercing hole 19 on the sealing device 17, seal after completing the butt joint of the reinforcing bar 13, and then perform the grouting operation.

On the basis of the above embodiments, in another embodiment of the present invention, the sealing device 17 is an elastic sealing ring.

On the basis of the above-mentioned embodiments, in another embodiment of the present invention, the sealing device 17 is connected to the sleeve body 1 by threads or clips. In this way, the sealing device 17 forms a reliable connection with the sleeve body 1, which can avoid the phenomenon that the sealing device 17 is pushed open due to the impact force of the grouting material 14 and its own gravity during the grouting process.

On the basis of the above embodiments, in another embodiment of the present invention, the two side walls of the sealing device 17 are provided with anchoring protrusions. In this way, the sealing device 17 can form a certain anchoring force with the grouting material 14 on both sides and the cast-in-place layer, and indirectly strengthen the connection between the sleeve body 1 and the two.

On the basis of the above embodiments, in another embodiment of the present invention, as shown in Figures 15 and 16, the sealing device 17 is a locking sleeve 18, and the locking sleeve 18 is connected to the inner part of the end of the sleeve body 1. The cavity 5 is interference fit, and the locking sleeve 18 is made of mild steel or spring steel. In this way, after the butt joint of the steel bar 13 is completed, the locking sleeve 18 is pushed inward when sealing. Since the inner diameter of the sleeve body 1 gradually becomes smaller from the end to the middle, the locking sleeve 18 is elastically deformed, and then tightened. Locking the reinforcing bar 13 can prevent the reinforcing bar 13 from swinging during the grouting process.

On the basis of the above embodiments, in another embodiment of the present invention, as shown in FIG. 16 , a cutout 20 is formed at the end of the locking sleeve 18 . Such setting facilitates the deformation of the locking sleeve 18 . It should be understood that the cutout 20 can be provided at any one end or both ends of the locking sleeve 18 .

On the basis of the above embodiments, in another embodiment of the present invention, grooves are provided on the inner wall of the sleeve body 1 between the steel petals 8 . Such setting increases the grouting space while increasing the bite force between the inner wall of the sleeve body 1 and the grouting material 14 , increasing the overall tensile or shear force resistance of the joint portion of the sleeve body 1 . The groove is preferably arranged in a ring shape, that is, arranged along the circumference of the inner cavity 5 of the sleeve body 1 .

On the basis of the above embodiments, in another embodiment of the present invention, the outer surface of the sleeve body 1 is provided with an annular groove. Such setting increases the contact area between the sleeve body 1 and the concrete of the prefabricated part 21, and increases the anchoring force between the grouting sleeve and the concrete.

On the basis of the above embodiments, in another embodiment of the present invention, the two ends 4 of the sleeve body 1 are provided as oblique openings. Such setting increases the diameter of the inner cavity 5 at the end, and at the same time, the bevel can also play a guiding role, which is beneficial for the insertion of the steel bar 13 to realize the butt joint.

The utility model also provides a prefabricated part 21, examples of which are as follows, referring to Figures 17 and 18, the prefabricated part 21 is pre-embedded with pre-embedded steel bars 22 and the grouting sleeve described in any one of the above, and the pre-embedded steel bars 22 links to each other with fixture 4. In this way, the prefabricated part 21 is pre-embedded with a grouting sleeve, which is connected with the protruding steel bars of the prefabricated part 21 to be assembled through the grouting sleeve, and then grouted and fixed to realize the butt joint installation of the prefabricated part 21 .

The above is only a preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made, these improvements and Retouching should also be regarded as the scope of protection of the present utility model.

Claims (20)

1. a grout sleeve, including sleeve body, described sleeve body is provided with grouting mouth and air vent, it is characterized in that, described sleeve body both ends open, being provided with fixture in the middle part of described sleeve body inner chamber, the internal diameter of described sleeve body is gradually reduced to middle part by two ends, and the inwall of described sleeve body is by the corrugated extension of inward at both ends.

Grout sleeve the most according to claim 1, it is characterised in that the bottom of described sleeve body end inner chamber is provided with annular protrusion.

Grout sleeve the most according to claim 1, it is characterised in that the inwall of described sleeve body is provided with annular groove at middle part.

Grout sleeve the most according to claim 3, it is characterised in that at described annular groove, the internal diameter of inner chamber is gradually increased to middle part by two ends.

5. according to the grout sleeve described in Claims 1 to 4 any one, it is characterised in that the inwall of described sleeve body is provided with steel lobe.

Grout sleeve the most according to claim 5, it is characterised in that set the steel lobe of more than two lobes on the inwall of described sleeve body.

Grout sleeve the most according to claim 6, it is characterised in that be less than the diameter of reinforcing bar to be connected between described steel lobe along the distance that the inner chamber of sleeve body is circumferential.

Grout sleeve the most according to claim 7, it is characterised in that offered slurry hole on described steel lobe or led stock tank.

Grout sleeve the most according to claim 8, it is characterised in that described steel lobe is helical form.

Grout sleeve the most according to claim 9, it is characterised in that described steel lobe is provided with groove or projection.

11. grout sleeves according to claim 9, it is characterised in that described steel lobe inwall is by the inside corrugated extension of opening.

12. grout sleeves according to claim 1, it is characterised in that described fixture is threaded mouth or fixing bolt.

13. grout sleeves according to claim 1, it is characterised in that described sleeve body outer surface is matsurface.

14. grout sleeves according to claim 1, it is characterised in that the opening of described sleeve body is provided with closing device, described closing device is provided with jack hole.

15. grout sleeves according to claim 14, it is characterised in that described closing device uses screw thread or shackle member to be connected with sleeve body.

16. grout sleeves according to claim 14, it is characterised in that the two side of described closing device is provided with anchoring projection.

17. grout sleeves according to claim 16, it is characterised in that described closing device is lock sleeve, the inner chamber interference fit of described lock sleeve and described sleeve body opening, described lock sleeve is mild steel or prepared by spring steel.

18. grout sleeves according to claim 17, it is characterised in that the end of described lock sleeve offers otch.

19. grout sleeves according to claim 10, it is characterised in that the sleeve body inwall between described steel lobe is provided with groove.

20. 1 kinds of prefabricated components, it is characterised in that described prefabricated component is embedded with the grout sleeve described in embedded bar and claim 1～19 any one, and described embedded bar is connected with fixture.