CN210788753U - Forming device of grouting sleeve shear groove for steel bar connection - Google Patents
Forming device of grouting sleeve shear groove for steel bar connection Download PDFInfo
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- CN210788753U CN210788753U CN201921287599.6U CN201921287599U CN210788753U CN 210788753 U CN210788753 U CN 210788753U CN 201921287599 U CN201921287599 U CN 201921287599U CN 210788753 U CN210788753 U CN 210788753U
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Abstract
The utility model discloses a forming device of a grouting sleeve shear groove for connecting steel bars, which comprises a shear groove forming female die, a steel pipe to be formed, expansion particles, a bottom sealing flange and a top sealing flange; the middle part of the top cover flange is provided with a through hole; a movable expansion extrusion rod is arranged in the through hole, and the expansion extrusion rod extrudes the expansion particles downwards and around; the expansion extrusion rod extrudes the expansion particles by applying external force, the flowability of the expansion particles is utilized to flow to the periphery to generate extrusion force, the inner wall of the steel pipe to be formed is extruded, so that the steel pipe to be formed is deformed, and a grouting sleeve with an annular groove is formed under the action of a shear groove forming female die; the forming device has the advantages of high material utilization rate, reduced stress concentration, lighter sleeve weight, higher strength, lower cost and high one-time qualification rate of products under the same stress condition.
Description
Technical Field
The utility model relates to shear force groove shaping technical field, concretely relates to forming device in grout sleeve shear force groove for steel bar connection.
Background
The grouting sleeve for connecting the reinforcing steel bars is a part for connecting the deformed steel bars in adjacent reinforced concrete building components, and the connection is realized through the force transmission effect of the cement-based grouting material. The use of the grouting sleeve enables the on-site assembly construction of the construction industry to be possible, greatly improves the construction efficiency, and saves time, labor and site cost.
The grouting sleeve has a large usage amount in the industry and has considerable economic benefits, and the national housing and urban and rural construction department has issued a plurality of relevant standards of grouting sleeves in recent years and is supported and encouraged by the country.
The manufacturing core of the grouting sleeve is the shear groove forming, and the formed sleeve has high tensile strength.
The current sleeve manufacturing methods mainly comprise two methods: casting and machining. Although they are both satisfactory for use, both manufacturing approaches have common disadvantages: 1. the manufacturing cost is high; 2. the product quality is limited by the manufacturing method, the product qualification rate is not high, and particularly the product qualification rate of the casting method is low.
Disclosure of Invention
The utility model aims at providing a forming device of grout sleeve shear force groove for steel bar connection to the problem that prior art exists.
In order to achieve the above object, the utility model adopts the following technical scheme:
a molding device of a shear groove of a grouting sleeve for connecting reinforcing steel bars comprises a shear groove molding female die, wherein a steel pipe to be molded is placed in the shear groove molding female die, and expansion particles are arranged in the steel pipe to be molded; the upper end and the lower end of the shear groove forming female die are fixedly connected through a bottom sealing cover flange and a top sealing cover flange respectively; a through hole is formed in the middle of the top cover sealing flange, the through hole is opposite to the central axis of the steel pipe to be formed, and the diameter of the through hole is smaller than the inner diameter of the steel pipe to be formed; and a movable expansion extrusion rod is arranged in the through hole, and the expansion extrusion rod extrudes the expansion particles downwards and all around.
The forming device of the grouting sleeve shear groove for connecting the reinforcing steel bars is matched with auxiliary parts such as a shear groove forming female die, a top sealing flange, a bottom sealing flange, an expansion extrusion rod and the like on the basis of the steel pipe meeting the national standard requirements of the grouting sleeve, and changes the change of the filling volume of a closed space in the steel pipe to be formed by utilizing the fluidity of expansion particles, so that the steel pipe deforms under the accurate control, and the forming effect is achieved; the expansion extrusion rod extrudes the expansion particles by applying external force, the expansion particles are forced to flow around to generate extrusion force, and the extrusion force is used for extruding the inner wall of the steel pipe to be formed, so that the steel pipe to be formed is deformed, and a grouting sleeve with an annular groove is formed under the action of the shear groove forming female die.
The forming device better utilizes the fluidity of the expanded particles and simultaneously utilizes the physical characteristics of the direct force transmission of the solid, most importantly, compared with the pressure transmission of the liquid, the forming device ingeniously avoids the sealing problem of the liquid under high pressure and integrates the fluidity similar to the liquid and the self solid characteristics of the expanded particles under most of sets.
The shear groove forming female die, the top cover sealing flange and the bottom cover sealing flange which are arranged in a matched manner are convenient for disassembly and assembly of the forming device, can be repeatedly used, and reduces the manufacturing cost;
the top sealing cover flange is provided with a through hole for filling expansion particles and providing a guiding function for the expansion extrusion rod; the through-hole size is less than treat the internal diameter of shaping steel pipe, the expansion particles fall into when avoiding filling the expansion particles the shear force groove shaping die with treat in the clearance between the shaping steel pipe outer wall to produce the waste product.
Preferably, the top cover sealing flange and the bottom cover sealing flange are respectively provided with an inward concave positioning step on the surface contacting with the steel pipe to be formed, two ends of the steel pipe to be formed are respectively arranged in the positioning steps, and the length of the steel pipe to be formed is slightly greater than that of the shear groove forming female die.
The arrangement of the positioning steps is adopted, so that a slightly long steel pipe to be formed can be conveniently accommodated and fixed; when the expansion particles extrude the steel pipe to be formed to deform, the slightly longer steel pipe to be formed is beneficial to feeding, and meanwhile, the expansion particles are prevented from falling into a gap between the shear groove forming female die and the outer wall of the steel pipe to be formed.
Further, the expanded particles are solid particle media with fluidity. The particle size of the expanded particles is selected according to actual requirements, and the core of the expanded particles is that the expanded particles have the characteristics of strong fluidity, low friction extrusion and the like.
Preferably, the solid particle medium is one or more of metal steel balls, sand, silica particles, ceramic particles and silicon carbide particles.
Further, a lubricant is filled in the steel pipe to be formed; the lubricant is one of lubricating grease, lubricating oil, water, molybdenum disulfide and talcum powder. The lubricant is beneficial to improving the fluidity of the expanded particles, reducing the friction force and improving the forming efficiency.
Further, the through hole is an internal thread hole, and an external thread matched with the internal thread hole is arranged on the expansion extrusion rod; and pushing the expansion extrusion rod into the steel pipe to be formed by applying torque.
Furthermore, the through hole is a unthreaded hole, the expansion extrusion rod is a polished rod, and the polished rod is in clearance fit with the unthreaded hole; the clearance fit clearance is smaller than the particle size of the expanded particles; and pushing the expansion extrusion rod into the steel pipe to be formed by applying an axial external force.
Furthermore, one end of the expansion extrusion rod inserted into the steel pipe to be formed is conical, so that the end part of the expansion extrusion rod can be smoothly inserted into the expansion particles; and the outer tail end of the expansion extrusion rod is provided with a mounting connecting block for connecting and mounting an external pressure device.
Further, both ends of the shear groove forming female die are provided with straight sections, and the middle section of the shear groove forming female die is provided with a plurality of annular grooves and annular bulges which are alternately arranged; the outer wall of the steel pipe to be molded is tightly attached to the annular bulge; and the clearance between the outer wall of the steel pipe to be molded and the straight section is smaller than the particle size of the expansion particles.
The shear groove forming female die is of a split structure, such as a left-right split structure, and comprises a pair of half dies which are symmetrically arranged, and the half dies are respectively connected with the bottom cover flange and the top cover flange through bolts.
A method for forming a shear groove of a grouting sleeve for connecting reinforcing steel bars comprises any one of the devices for forming the shear groove of the grouting sleeve for connecting the reinforcing steel bars; the molding method specifically comprises the following steps:
step (1): manufacturing a shear groove forming female die according to a process drawing, wherein an inner groove is designed by adopting an annular groove;
step (2): fixing a top sealing cover flange and a bottom sealing cover flange at two ends of the shear groove forming female die in a screwing mode, and presetting a steel pipe to be formed in the shear groove forming female die; and fixedly supporting the forming device on the flat surface for standby;
and (3): filling expansion particles into the through hole of the top sealing flange, adding corresponding lubricant, and inserting an expansion extrusion rod into the through hole;
and (4): applying external force to the top of the expansion extrusion rod to press the expansion extrusion rod to move towards the steel pipe to be formed, extruding expansion particles in the steel pipe to be formed by the expansion extrusion rod, transmitting extrusion force to the inner wall of the steel pipe to be formed by the expansion particles in a limited space, and deforming the inner wall of the steel pipe to be formed under the action of continuous extrusion force until the deformation is filled in the inner space of the shear groove forming female die, so that the forming is finished;
and (5): and sequentially taking out the expansion extrusion rod, disassembling the top sealing flange and the bottom sealing flange, taking out the formed steel pipe, and cleaning to obtain the formed grouting sleeve.
Further, in the step (2), the operation method of presetting the steel pipe to be formed in the shear groove forming female die comprises the following steps: firstly, a bottom sealing cover flange is screwed below the shear groove forming female die, then the steel pipe to be formed is inserted into the shear groove forming female die from the upper part until the end part of the steel pipe is tightly contacted with the bottom sealing cover flange, then the top sealing cover flange is screwed above the shear groove forming female die, and a through hole in the middle of the top sealing cover flange is over against the middle of the steel pipe to be formed.
The forming process of the forming device is advanced and efficient, the material utilization rate is high, stress concentration is reduced, and the sleeve is lighter in weight, higher in strength and lower in cost under the condition of equal stress; the sleeve cold machining method has the advantages of simple machining, high efficiency, high one-time qualification rate of products, reliable quality, energy conservation and environmental protection, and skillfully solves the problem of sleeve cold machining.
Compared with the prior art, the beneficial effects of the utility model are that: 1. the forming device better utilizes the fluidity of the expanded particles and simultaneously utilizes the physical characteristics of the direct force transmission of the solid, most importantly, compared with the pressure transmission of the liquid, the forming device skillfully avoids the sealing problem of the liquid under high pressure and integrates the fluidity of the expanded particles similar to the liquid and the self solid characteristics under most of the aggregation; 2. the expansion extrusion rod extrudes the expansion particles by applying external force, the flowability of the expansion particles is utilized to flow to the periphery to generate extrusion force, the inner wall of the steel pipe to be formed is extruded, so that the steel pipe to be formed is deformed, and a grouting sleeve with an annular groove is formed under the action of a shear groove forming female die; 3. gaps generated by the matched surfaces are smaller than the size of the expansion particles, so that the expansion particles are prevented from falling into the gap between the shear groove forming female die and the outer wall of the steel pipe to be formed when the expansion particles are filled, and waste products are avoided; 4. the forming device is advanced and efficient, has high material utilization rate, reduces stress concentration, and has lighter sleeve weight, higher strength and lower cost under the condition of equal stress; the sleeve cold machining method has the advantages of simple machining, high efficiency, high one-time qualification rate of products, reliable quality, energy conservation and environmental protection, and skillfully solves the problem of sleeve cold machining.
Drawings
Fig. 1 is a schematic structural view of a forming device of a shear groove of a grouting sleeve for connecting reinforcing steel bars according to the present invention;
fig. 2 is a schematic view of a forming state of the forming device of the grouting sleeve shear groove for connecting reinforcing steel bars of the present invention;
fig. 3 is a structural diagram of a formed grouting sleeve of a forming device of a grouting sleeve shear groove for connecting reinforcing steel bars according to the present invention;
in the figure: 1. expanding the extrusion stem; 101. installing a connecting block; 2. a bolt; 3. a top cover flange; 301. a through hole; 4. a shear groove forming female die; 401. a straight section; 402. an annular groove; 403. an annular projection; 5. a steel pipe to be formed; 6. expanded particles; 7. a bottom cover flange; 8. and (5) forming the grouting sleeve.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The first embodiment is as follows:
as shown in fig. 1 and 2, the forming device for the shear groove of the grouting sleeve for connecting the steel bars comprises a shear groove forming female die 4, wherein a steel pipe 5 to be formed is placed in the shear groove forming female die 4, and expansion particles 6 are arranged in the steel pipe 5 to be formed; the upper end and the lower end of the shear groove forming female die 4 are fixedly connected with a bottom cover sealing flange 7 and a top cover sealing flange 3 through bolts 2 respectively; a through hole 301 is formed in the middle of the top cover flange 3, the through hole 301 is opposite to the central axis of the steel pipe 5 to be formed, and the diameter of the through hole 301 is smaller than the inner diameter of the steel pipe 5 to be formed; the through hole 301 is internally provided with a movable expansion extrusion rod 1, and the expansion extrusion rod 1 extrudes the expansion particles 6 downwards and peripherally.
The forming device of the grouting sleeve shear groove for connecting the steel bars is matched with auxiliary parts such as a shear groove forming female die 4, a top cover sealing flange 3, a bottom cover sealing flange 7, an expansion extrusion rod 1 and the like on the basis of the steel pipe meeting the national standard requirements of the grouting sleeve, changes the change of the filling volume of a closed space in the steel pipe 5 to be formed by utilizing the fluidity of expansion particles 6, and leads the steel pipe to deform under the accurate control so as to achieve the forming effect; the expansion extrusion rod 1 extrudes the expansion particles 6 by applying external force, the expansion particles 6 are forced to flow around to generate extrusion force, and the extrusion force is used for extruding the inner wall of the steel pipe 5 to be formed, so that the steel pipe 5 to be formed is deformed, and a forming grouting sleeve 8 with an annular groove is formed under the action of the shear groove forming female die 4.
The forming device better utilizes the fluidity of the expanded particles 6 and simultaneously utilizes the physical characteristics of direct force transmission of solid, most importantly, compared with the pressure transmission of liquid, the forming device ingeniously avoids the sealing problem of liquid under high pressure and integrates the fluidity similar to the liquid and the self solid characteristics of the expanded particles under most of collections.
The shear groove forming female die 4, the top cover sealing flange 3 and the bottom cover sealing flange 7 which are arranged in a matched manner are convenient for disassembly and assembly of the forming device, can be repeatedly used, and reduces the manufacturing cost;
the top cover flange 3 is provided with a through hole 301 for filling expansion particles 6 and providing a guiding function for the expansion extrusion rod 1; the size of the through hole 301 is smaller than the inner diameter of the steel pipe 5 to be formed, so that expansion particles are prevented from falling into a gap between the shear groove forming female die and the outer wall of the steel pipe to be formed when the expansion particles are filled, and waste products are prevented from being produced.
Further, the expanded particles 6 are solid particle media with fluidity, and metal steel balls are selected in the embodiment.
Further, a lubricant is filled in the steel pipe to be formed; the lubricant is grease. The lubricant is advantageous in improving the fluidity of the expanded particles 6, reducing the frictional force, and improving the molding efficiency.
Further, the through hole 301 is an internal threaded hole, and an external thread matched with the internal threaded hole is arranged on the expansion extrusion rod 1; the expansion extrusion stem 1 is pushed into the steel pipe 5 to be formed by applying torque.
Furthermore, the end part of one end of the expansion extrusion rod 1 inserted into the steel pipe 5 to be formed is conical, so that the end part can be smoothly inserted into the expansion particles 6; and the outer tail end of the expansion extrusion rod 1 is provided with a mounting connecting block 101 for connecting and mounting an external pressure device.
Further, both ends of the shear groove forming female die 4 are provided with straight sections 401, and the middle section of the shear groove forming female die 4 is provided with a plurality of annular grooves 402 and annular protrusions 403 which are alternately arranged; the outer wall of the steel pipe 5 to be formed is tightly attached to the annular bulge 403; the clearance between the outer wall of the steel pipe 5 to be formed and the straight section 401 is smaller than the particle size of the expansion particles 6.
The shear groove forming female die 4 is of a left-right parting structure and comprises a pair of half dies which are symmetrically arranged, and the half dies are respectively connected with the bottom cover flange 7 and the top cover flange 3 through bolts 2.
Example two:
the difference between the present embodiment and the first embodiment is that the through hole and the expansion extrusion rod are arranged differently.
Specifically, the through hole 301 is a unthreaded hole, the rod body of the expansion extrusion rod 1 is a polished rod, and the polished rod is in clearance fit with the unthreaded hole; the clearance fit clearance is smaller than the particle size of the expanded particles 6; and pushing the expansion extrusion rod into the steel pipe to be formed by applying an axial external force. The polished rod and the polished hole are easier to process, and the manufacturing cost is reduced.
Example three:
this embodiment differs from embodiment one in that the top and bottom cover flanges are arranged differently.
Specifically, the top cover sealing flange 3 and the bottom cover sealing flange 7 are respectively provided with an inward concave positioning step on the surface contacting with the steel pipe 5 to be formed, two ends of the steel pipe 5 to be formed are respectively arranged in the positioning steps, and the length of the steel pipe 5 to be formed is slightly larger than that of the shear groove forming female die 4.
The arrangement of the positioning steps is adopted, so that the steel pipe 5 to be formed which is slightly long can be conveniently accommodated and fixed; when the expansion particles 6 extrude the steel pipe 5 to be formed to deform, the slightly longer steel pipe to be formed is beneficial to feeding, and meanwhile, the expansion particles 6 are prevented from falling into a gap between the shear groove forming female die 4 and the outer wall of the steel pipe 5 to be formed.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A forming device of a shear groove of a grouting sleeve for connecting reinforcing steel bars is characterized by comprising a shear groove forming female die, wherein a steel pipe to be formed is placed in the shear groove forming female die, and expansion particles are arranged in the steel pipe to be formed; the upper end and the lower end of the shear groove forming female die are fixedly connected through a bottom sealing cover flange and a top sealing cover flange respectively; a through hole is formed in the middle of the top cover sealing flange, the through hole is opposite to the central axis of the steel pipe to be formed, and the diameter of the through hole is smaller than the inner diameter of the steel pipe to be formed; and a movable expansion extrusion rod is arranged in the through hole, and the expansion extrusion rod extrudes the expansion particles downwards and all around.
2. A device for forming a shear groove of a grout sleeve for reinforcing bar connection as claimed in claim 1, wherein the swelling particles are solid particle medium having fluidity.
3. The apparatus as claimed in claim 2, wherein the solid granular medium is one or more selected from metal steel balls, sand, silica particles, ceramic particles, and silicon carbide particles.
4. The device for forming the shear groove of the grouting sleeve for connecting the steel bars as claimed in claim 1, wherein the steel pipe to be formed is further filled with a lubricant; the lubricant is one of lubricating grease, lubricating oil, water, molybdenum disulfide and talcum powder.
5. The forming device of the shear groove of the grouting sleeve for connecting the steel bars as claimed in claim 1, wherein the through hole is an internal threaded hole, and the expansion extrusion rod is provided with an external thread matched with the internal threaded hole; and pushing the expansion extrusion rod into the steel pipe to be formed by applying torque.
6. The apparatus as claimed in claim 1, wherein the through hole is a smooth hole, the expansion extrusion rod is a polish rod, and the polish rod is in clearance fit with the smooth hole; the clearance fit clearance is smaller than the particle size of the expanded particles; and pushing the expansion extrusion rod into the steel pipe to be formed by applying an axial external force.
7. The apparatus for forming a shear groove of a grout sleeve for reinforcing bar connection according to claim 1, wherein one end of the expansion extrusion rod inserted into the steel pipe to be formed is tapered; and the outer tail end of the expansion extrusion rod is provided with a mounting connecting block.
8. The forming device of the shear groove of the grouting sleeve for connecting the steel bars according to claim 1, wherein the shear groove forming female die is of a split structure, both ends of the shear groove forming female die are provided with straight sections, and the middle section of the shear groove forming female die is provided with a plurality of annular grooves and annular bulges which are alternately arranged; the outer wall of the steel pipe to be molded is tightly attached to the annular bulge; and the clearance between the outer wall of the steel pipe to be molded and the straight section is smaller than the particle size of the expansion particles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921287599.6U CN210788753U (en) | 2019-08-09 | 2019-08-09 | Forming device of grouting sleeve shear groove for steel bar connection |
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| CN201921287599.6U CN210788753U (en) | 2019-08-09 | 2019-08-09 | Forming device of grouting sleeve shear groove for steel bar connection |
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| CN210788753U true CN210788753U (en) | 2020-06-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110479823A (en) * | 2019-08-09 | 2019-11-22 | 武汉源锦建材科技有限公司 | A kind of reinforcing bar connection shears the molding machine and forming method of slot with grout sleeve |
-
2019
- 2019-08-09 CN CN201921287599.6U patent/CN210788753U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110479823A (en) * | 2019-08-09 | 2019-11-22 | 武汉源锦建材科技有限公司 | A kind of reinforcing bar connection shears the molding machine and forming method of slot with grout sleeve |
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