An end taper grinding tool assembly for steel strands used for segmental beam threading

Abstract

The present invention proposes an end taper grinding tool assembly for steel strands used for segmental beam installation. It includes a hand-held electric drill body, a grinding sleeve connected to the output shaft of the hand-held electric drill body, and a guide positioning assembly; the guide positioning assembly includes a guide sleeve whose inner diameter is consistent with the outer diameter of the steel strand and a fixing bolt installed at one end of the guide sleeve through a thread, and the fixing bolt is adjusted along the radial direction of the guide sleeve to fix the guide sleeve on the steel strand to be ground; the grinding sleeve includes a conical grinding section and a positioning section, the positioning section has a positioning cylindrical surface for being sleeved on the outer periphery of the guide sleeve and rotatably matched with the guide sleeve, and a conical grinding stone is fixed on the inner conical surface of the conical grinding section; when grinding, the rotating grinding stone approaches the guide positioning assembly axially to gradually approach the end of the steel strand and grind it. It has the advantages of simple structure, convenient operation, safety and reliability, high grinding efficiency and high grinding quality.

Description

Technical Field

[0001] The invention relates to an end taper grinding tool assembly for steel strands used for segment beam installation. Background Art

[0002] In the construction of municipal viaducts, segmental beams are often used. Segmental beams are provided with holes for inserting steel strands along their longitudinal direction. Steel strands need to be installed in series between multiple segmental beams. Considering the load-bearing capacity, segmental beams have multiple holes, and 10-20 steel strands need to be inserted in each hole. Figure 1 As shown in FIG. 1 , the steel strand 4 consists of a central steel wire 41 and six surrounding steel wires 42 spirally wound around the central steel wire. When inserting, since multiple steel strands are inserted into the perforations together, loose steel strands are not easy to penetrate into the perforations. For this purpose, the following method can be used: Figure 2 The method shown in the figure aligns the ends of multiple steel strands 4 and then ties them together with steel belts 001. In order to reduce the volume of the ends of the steel strands as much as possible to make the installation smoother, it is often necessary to manually hold the ends of the steel strands and grind them on a grinder to grind the steel strands into a conical structure. However, during the grinding process, there are the following problems: manual grinding is very slow and the grinding quality is not high. It often causes injuries to personnel, uneven cone shapes, and wire breakage of surrounding steel wires due to poor operation, which is time-consuming and laborious. Summary of the invention

[0003] The invention provides an end taper grinding tool assembly for steel strands used for segment beam installation, which has the advantages of simple structure, convenient operation, safety, reliability and high grinding efficiency.

[0004] The technical solution of the present invention is implemented as follows: the end taper grinding tool assembly for steel strands used for segment beam threading comprises a hand-held electric drill body, a grinding sleeve drivingly connected to the output shaft of the hand-held electric drill body, and a guide positioning assembly;

[0005] The guide positioning assembly includes a guide sleeve whose inner diameter is consistent with the outer diameter of the steel strand and a fixing bolt installed at one end of the guide sleeve through a thread, and the fixing bolt is adjusted along the radial direction of the guide sleeve to fix the guide sleeve on the steel strand to be polished;

[0006] The grinding sleeve comprises a conical grinding section and a positioning section, wherein the positioning section has a positioning cylindrical surface which is sleeved on the outer periphery of the guide sleeve and rotatably cooperates with the guide sleeve, and a conical grinding stone is fixed on the inner conical surface of the conical grinding section;

[0007] During grinding, the rotating grinding stone approaches the guide positioning assembly in the axial direction to gradually approach the end of the steel strand and grind it.

[0008] Furthermore, the positioning section includes a circular plate with a circular hole and a connecting tube with one end detachably connected to the circular plate, the other end of the connecting tube is connected to the open end of the conical grinding section, the grinding stone is detachably installed in the conical grinding section, and the hole wall surface of the circular hole constitutes the positioning cylindrical surface. This structure can more conveniently replace the grinding stone after it is worn.

[0009] Furthermore, the circular plate and the connecting cylinder are connected by bolts.

[0010] Furthermore, the end of the guide sleeve away from the fixing bolt is chamfered, which can facilitate the sliding fit between the positioning section and the guide sleeve, that is, the positioning section is sleeved on the guide sleeve for guidance.

[0011] Furthermore, there are three fixing bolts, which are evenly distributed along the circumference of the guide sleeve. This method can make the guide sleeve and the steel strand as coaxial as possible, and can better fix the steel strand to prevent the surrounding steel wires from opening and loosening.

[0012] Furthermore, the grinding sleeve is detachably connected to the output shaft of the hand electric drill body.

[0013] Furthermore, a stopper for stoppering and cooperating with the front end surface of the positioning section is provided on the guide sleeve at one end close to the fixing bolt.

[0014] Furthermore, the guide sleeve comprises a small diameter section and a large diameter section, the large diameter section constitutes the stopper, and the fixing bolt is screwed onto the large diameter section through a bolt hole.

[0015] By adopting the above technical scheme, the beneficial effects of the present invention are as follows: using the end cone grinding tool assembly of the steel strand for segmental beam installation of the present invention, first, there is no need to manually hold the steel strand on the grinding machine to grind it, and only the guide positioning assembly needs to be sleeved on the steel strand and locked in a suitable position by a fixing bolt, and then the hand-held electric drill body is held, the grinding sleeve is positioned and slid on the guide sleeve, and after the electric drill is turned on, the end of the steel strand can be tilted and grinded by the grinding stone, and since the positioning section and the guide sleeve are matched, it is ensured that there will be no deviation during grinding, and the shape of the polished cone head is uniform; second, since the guide positioning assembly is locked on the steel strand, the surrounding steel wires of the steel strand are not easy to loosen during grinding; third, the grinding sleeve is a closed structure, and the debris generated by grinding is blocked by the grinding sleeve and will not splash into the air to pollute the environment, and since the human hand will not contact the internal grinding stone, it is very safe to avoid injuries to the operator; fourth, during grinding, the grinding can be completed after being pushed to the position once, and there is no need for manual slow adjustment, and the grinding efficiency is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 This is the structural diagram of the steel strand;

[0018] Figure 2 It is a schematic diagram of the structure after multiple steel strands are bundled with steel belts;

[0019] Figure 3 It is a structural diagram of the end taper grinding tool assembly of the steel strand for segment beam installation of the present invention;

[0020] Figure 4 This is the usage status diagram before polishing;

[0021] Figure 5 This is the usage status diagram during grinding;

[0022] Figure 6 The arrangement diagram of the fixing bolts of the guide and positioning assembly;

[0023] Among them: 001-steel belt, 1-hand drill body, 11-output shaft, 2-grinding sleeve, 21-conical grinding section, 211-grinding stone, 22-positioning section, 221-round plate, 2211-round hole, 222-connecting cylinder, 3-guide positioning assembly, 31-guide sleeve, 311-small diameter section, 3111-chamfer, 312-large diameter section, 32-tightening bolt, 4-steel strand, 41-center steel wire, 42-surrounding steel wire, 43-cone head. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] The specific embodiment of the end taper grinding tool assembly of the steel strand for segment beam installation of the present invention is as follows: Figure 3-4As shown, the end taper grinding tool assembly for the stranded wire used for segment beam threading includes a hand-held electric drill body 1, a grinding sleeve 2 drivingly connected to the output shaft 11 of the hand-held electric drill body 1, and a guide positioning assembly 3. The hand-held electric drill body 1 is a prior art, such as a hand-held electric drill commonly used in construction, an electric wrench for tightening bolts, an electric screwdriver for tightening screws, etc., which is briefly described as follows: it includes a pistol-shaped housing, a rechargeable battery located in the housing, a control circuit, a motor, an output shaft 11, etc.

[0026] The guide and positioning assembly 3 includes a guide sleeve 31 whose inner diameter is consistent with the outer diameter of the steel strand 4 and a fixing bolt 32 threadedly installed at one end of the guide sleeve 31. The fixing bolt 32 is adjusted radially along the guide sleeve 31 to fix the guide sleeve 31 on the steel strand 4 to be polished.

[0027] The grinding sleeve 2 includes a conical grinding section 21 and a positioning section 22. The positioning section 22 has a positioning cylindrical surface for being sleeved on the outer periphery of the guide sleeve 31 and rotatably matched with the guide sleeve 31. A conical grinding stone 211 is fixed on the inner conical surface of the conical grinding section 21.

[0028] During grinding, the rotating grinding stone 211 approaches the guide positioning assembly 3 in the axial direction to gradually approach the end of the steel strand 4 and grind it.

[0029] Specifically, the positioning section 22 includes a circular plate 221 with a circular hole 2211 and a connecting tube 222 detachably connected to the circular plate 221 at one end, the other end of the connecting tube 222 is connected to the open end of the conical grinding section 21, the tip of the conical grinding section 21 is connected to the output shaft 11 of the hand drill body 1, the grinding stone 211 is detachably installed in the conical grinding section 21, and the hole wall surface of the circular hole 2211 constitutes a positioning cylindrical surface. This structure can be more conveniently replaced after the grinding stone 211 is worn. The circular plate 221 and the connecting tube 222 are connected by bolts. A chamfer 3111 is provided at one end of the guide sleeve 31 away from the fixing bolt 32. The sliding fit between the positioning section 22 and the guide sleeve 31 can be facilitated, that is, the positioning section 22 is sleeved on the guide sleeve 31 for guidance. As Figure 6 As shown, there are three fixing bolts 32, which are evenly distributed along the circumference of the guide sleeve 31. This method can make the guide sleeve 31 as coaxial as possible with the steel strand 4 on the one hand, and can better fix the steel strand 4 on the other hand to prevent the surrounding steel wires 42 from being unthreaded or scattered. The grinding sleeve 2 is detachably connected to the output shaft 11 of the hand drill body 1. A stopper for cooperating with the front end surface of the positioning section 22 is provided on the guide sleeve 31 at one end close to the fixing bolt 32. The guide sleeve 31 includes a small diameter section 311 and a large diameter section 312, and the large diameter section 312 constitutes the stopper. Three radially arranged threaded through holes are evenly distributed circumferentially on the large diameter section 312, and the fixing bolt 32 is screwed onto the threaded through hole of the large diameter section 312 by threading.

[0030] When using the end cone grinding tool assembly of the steel strand for segment beam installation of the present invention, first, there is no need to manually hold the steel strand 4 on the grinding machine for grinding, and only the guide positioning assembly 3 is sleeved on the steel strand 4 and locked in a suitable position by the fixing bolt 32, and then the hand-held electric drill body 1 is held, and the grinding sleeve 2 is positioned and slid on the guide sleeve 31, and after turning on the electric drill, the end of the steel strand 4 can be grinded obliquely by relying on the grinding stone 211. Since the positioning section 22 cooperates with the guide sleeve 31, it is ensured that there will be no deflection during grinding, and the grinding is The conical head has a uniform shape; secondly, since the guide positioning component 3 is locked on the steel strand 4, the steel wire 42 around the steel strand 4 is not easy to loosen when being polished; thirdly, the polishing sleeve 2 is a closed structure, and the debris generated by polishing is blocked by the polishing sleeve 2 and will not splash into the air to pollute the environment, and since human hands will not come into contact with the internal polishing stone 211, injuries to operators are avoided, which is very safe; fourthly, when polishing, the polishing can be completed after being pushed to the position once, without the need for slow manual adjustment, and the polishing efficiency is higher.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An end taper grinding tool assembly for steel strands used for segmental beam threading, characterized in that: It includes a hand-held electric drill body, a grinding sleeve drivingly connected to the output shaft of the hand-held electric drill body, and a guide positioning component; The guide positioning assembly includes a guide sleeve whose inner diameter is consistent with the outer diameter of the steel strand and a fixing bolt installed at one end of the guide sleeve through a thread, and the fixing bolt is adjusted along the radial direction of the guide sleeve to fix the guide sleeve on the steel strand to be polished; The grinding sleeve comprises a conical grinding section and a positioning section, wherein the positioning section has a positioning cylindrical surface which is sleeved on the outer periphery of the guide sleeve and rotatably cooperates with the guide sleeve, and a conical grinding stone is fixed on the inner conical surface of the conical grinding section; During grinding, the rotating grinding stone approaches the guide positioning assembly in the axial direction to gradually approach the end of the steel strand and grind it; The positioning section includes a circular plate with a circular hole and a connecting tube with one end detachably connected to the circular plate, the other end of the connecting tube is connected to the open end of the conical grinding section, the grinding stone is detachably installed in the conical grinding section, and the hole wall surface of the circular hole constitutes the positioning cylindrical surface; The circular plate and the connecting cylinder are connected by bolts; One end of the guide sleeve away from the fixing bolt is provided with a chamfer.

2. The end taper grinding tool assembly for steel strands used for segment beam installation according to claim 1 is characterized in that: There are three fixing bolts which are evenly distributed along the circumference of the guide sleeve.

3. The end taper grinding tool assembly for steel strands for segment beam installation according to claim 1 is characterized in that: The grinding sleeve is detachably connected to the output shaft of the hand electric drill body.

4. The end taper grinding tool assembly for steel strands for segment beam installation according to claim 1 is characterized in that: A stopper for stoppering and cooperating with the front end surface of the positioning section is arranged on the guide sleeve at one end close to the fixing bolt.

5. The end taper grinding tool assembly for steel strands for segment beam installation according to claim 4, characterized in that: The guide sleeve comprises a small diameter section and a large diameter section, the large diameter section constitutes the stopper, and the fixing bolt is screwed onto the large diameter section through a bolt hole.

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