Clamping tool and safety valve body machining tool

Abstract

The utility model relates to a clamping tool and a safety valve body processing machine tool, which are used for clamping a valve body and comprise a rotating piece, a clamping piece, a clamping piece and a clamping piece, the clamping piece is provided with a center threaded hole and a notch, the notch penetrates through the edge of the clamping piece and the center threaded hole, the center threaded hole is in threaded connection with the valve body, and the multiple clamping jaws located on the periphery of the clamping piece inwards clamp the outer wall of the clamping piece in the radial direction of the center threaded hole; according to the utility model, the valve body is arranged on the rotating piece and is clamped by the clamping jaw, so that the positioning and clamping efficiency of the tool on the valve body is improved, and the milling working efficiency of the valve body is further effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to processing frock technical field especially is a kind of clamping frock and safety valve body processing machine tool. BACKGROUND

[0002] Safety valve is commonly used in pressure vessel, pipeline or other pressure system for providing safety protection device, when system pressure value exceeds set value, safety valve will open in time and discharge medium, prevent system pressure from being too high and happening dangerous. Valve body as the main structural part of safety valve, play the role of carrying pressure from safety valve inside. In order to facilitate installation valve body, usually milling thread section and hex head consisting of six support surfaces for wrench to be twisted on valve body outside during processing, currently in valve body processing process, mainly through frock to complete valve body clamping, first, since the angle of frock is relatively fixed milling cutter, this makes every milling a support surface need to disassemble, adjust angle, clamp valve body, six support surfaces need to clamp six times to complete processing, not only the technical requirement of worker is relatively high, processing efficiency is very low, simultaneously also easy to cause valve body bad and scrap. Secondly, for the safety valve of different valve diameter, its valve body size is also different, and valve body will have multiple specifications in production, and the frock cannot quickly clamp valve body of different specifications, there is the defect of insufficient applicability. SUMMARY

[0003] Therefore, the utility model wants to overcome the technical problems in prior art that the positioning and clamping efficiency of frock to valve body is low, complete the milling of six support surfaces of valve body needs to disassemble and clamp valve body multiple times, lead to the problem of low milling work efficiency, further provide a kind of clamping frock and safety valve body processing machine tool, improve the positioning and clamping efficiency of frock to valve body, further effectively improve the milling work efficiency of valve body.

[0004] To solve the above technical problems, the utility model provides a kind of clamping frock, it is used for clamping valve body, including,

[0005] Rotating member, it is set to be able to rotate and be equipped with dog claw;

[0006] Clamping member is equipped with center threaded hole and notch, the notch penetrates the edge of the clamping member and the center threaded hole, the center threaded hole is threadedly connected the valve body, multiple dog claws located at the periphery of the clamping member are inwardly clamped the outer wall of the clamping member along the radial direction of the center threaded hole.

[0007] In an embodiment of the utility model, the rotating member is equipped with T-shaped sliding groove, the dog claw is equipped with slider that is profiled with the T-shaped sliding groove, and the slider is slidably connected with the T-shaped sliding groove.

[0008] In one embodiment of the utility model, the sliding block is provided with a through hole, the T-shaped sliding groove is provided with a plurality of screw holes along the length direction thereof, and the connecting piece is threadedly connected with the screw holes through the through hole.

[0009] In one embodiment of the utility model, the rotating piece is a disc, and the T-shaped sliding groove extends along the radial direction of the disc.

[0010] In one embodiment of the utility model, the disc is provided with a plurality of T-shaped sliding grooves which are uniformly distributed along the circumferential direction of the disc, and the claws are slidingly connected to the T-shaped sliding grooves.

[0011] In one embodiment of the utility model, the clamping piece is a ring, the central threaded hole is located at the center of the ring, and the ring is coaxially arranged with the disc.

[0012] In one embodiment of the utility model, the ring is further provided with a plurality of deformation gaps, the deformation gaps extend from the central threaded hole to the edge of the ring, and the plurality of deformation gaps and the notches are uniformly distributed along the circumferential direction of the ring.

[0013] In one embodiment of the utility model, a plurality of protrusions are arranged on the surface of the claw.

[0014] In one embodiment of the utility model, the clamping piece is composed of an elastic material.

[0015] In one embodiment of the utility model, the inner wall of the central threaded hole is further provided with a protruding part.

[0016] The utility model also provides a safety valve body processing machine tool, which comprises the clamping tool, a milling cutter and a machine tool spindle.

[0017] Compared with the prior art, the above technical scheme of the utility model has the following beneficial effects:

[0018] The clamping tool can clamp the valve body by clamping the claw on the rotating piece, can automatically align the milling cutter with the next milling point of the valve body by rotating the rotating piece after the milling of one supporting surface, thereby avoiding the disassembly and clamping of the valve body for multiple times, and greatly improving the clamping and positioning efficiency of the valve body. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to make the content of the utility model more easily be clearly understood, the following according to the specific embodiment of the utility model and combining with the drawings, the utility model is further detailed, wherein

[0020] Figure 1 It is the structure schematic view of the side view of the safety valve body machining machine tool in the preferred embodiment of the utility model;

[0021] Figure 2 It is the structure schematic view of the front view of the safety valve body machining machine tool shown in Figure 1

[0022] It is the structure schematic view of the cross section of the valve body shown in Figure 3 Figure 1 It is the structure schematic view of the front view of the clamping piece shown in

[0023] Figure 4 Figure 1 It is the structure schematic view of the cross section of the clamping piece shown in

[0024] Figure 5 It is the structure schematic view of the front view of the clamping piece shown in Figure 4

[0025] The description of the drawing of the specification: 1, valve body;11, hex head;12, threaded section;13, flow passage outer wall;2, clamping piece;21, internal thread;22, protruding portion;23, deformation gap;24, center threaded hole;25, notch;3, rotating member;4, clamping jaw;5, machine tool spindle;6, milling cutter. DETAILED DESCRIPTION

[0026] The utility model is further explained in conjunction with the drawings and specific embodiments, so that the person skilled in the art can better understand the utility model and can be implemented, but the embodiment is not as the limitation of the utility model. EMBODIMENT

[0027] Referring to Figure 1 In one embodiment of the utility model, a clamping tool is disclosed, which is used for clamping valve body 1;Referring to Figure 3 Valve body 1 is provided with hex head 11, threaded section 12 and flow passage outer wall 13, and the clamping tool comprises,

[0028] Rotating member 3 is realized rotation by being connected on rotating shaft, and the rotating member 3 is provided with at least three clamping jaws 4, and three clamping jaws 4 are annularly distributed around valve body 1 to clamp valve body 1 located in the middle, and the angle adjustment of valve body 1 can be realized by rotating rotating member 3, which avoids frequent disassembly and clamping of valve body 1 by hand, greatly improves the positioning and clamping efficiency of valve body 1;In order to improve the service life, rotating member 3 is preferably metal material; ​​​

[0029] The clamping part 2 is provided with a central threaded hole 24 and a notch 25, the inner wall of the central threaded hole 24 is provided with an internal thread 21, and the notch 25 penetrates the edge of the clamping part 2 and the central threaded hole 24. The notch 25 provides a deformation space for the clamping part 2 under pressure. Specifically, as the clamping part 2 is subjected to increasing pressure along its radial direction, the width of the notch 25 gradually narrows, and finally the clamping part 2 shrinks to press the valve body 1. The central threaded hole 24 is threadedly connected to the threaded section 12 of the valve body 1. By utilizing the small gap between the clamping part 2 and the threaded section 12, the risk of the valve body 1 being damaged by the clamping part 2 is reduced. After the valve body 1 is connected to the central threaded hole 24, the three clamping claws 4 located around the clamping part 2 clamp the outer wall of the clamping part 2 in the radial direction of the central threaded hole 24, so that the clamping part 2 shrinks to clamp the valve body 1.

[0030] Further, in order to accurately adjust the position of the clamping claw 4, so that the clamping tool can clamp valve bodies 1 of different specifications, the surface of the rotating part 3 is provided with a T-shaped sliding groove, the bottom of the clamping claw 4 is provided with a T-shaped sliding block matched with the T-shaped sliding groove, and the sliding block and the T-shaped sliding groove are slidably connected. The clamping claw 4 can be moved by pushing the sliding block along the T-shaped sliding groove, so as to clamp valve bodies 1 of different outer diameters.

[0031] Further, in order to accurately position the clamping claw 4 and prevent the clamping claw 4 from loosening, the sliding block is provided with a through hole, the T-shaped sliding groove is provided with a plurality of screw holes along its length direction, and a connecting member is threadedly connected to the screw holes through the through hole to fix the sliding block on the T-shaped sliding groove. When it is necessary to adjust the position of the clamping claw 4, the connecting member can be loosened. The connecting member is preferably a screw or a bolt.

[0032] Referring to Figure 2 The rotating part 3 is provided as a disc. The disc has good anti-vibration ability and anti-rotational inertia under high-speed rotation conditions, can maintain the rotation accuracy and stability of the valve body 1, and the T-shaped sliding groove extends in the radial direction of the disc. By sliding the sliding block close to or away from the center of the disc, the clamping claw 4 can clamp valve bodies 1 of different outer diameters.

[0033] Further, the same side of the disc is provided with three T-shaped sliding grooves uniformly distributed along the circumferential direction thereof, and the two ends of the T-shaped sliding grooves are both provided in an open manner, which is beneficial to disassembly and assembly of the sliding block. The sliding block and the clamping claw 4 are slidably connected to the three T-shaped sliding grooves. By using the three clamping claws 4 to clamp the valve body 1 from three directions with an included angle of sixty degrees, the loosening of the valve body 1 is prevented.

[0034] Referring to Figure 2As shown, in order to facilitate the clamping of the three claws 4 to the clamping piece 2, the clamping piece 2 is provided as a circular ring, and the central threaded hole 24 is located at the center of the circular ring. When the three claws 4 clamp the circular ring, the circular ring is coaxially arranged with the disc.

[0035] Referring to Figure 4 As shown, the circular ring is further provided with two deformation gaps 23. Both the two deformation gaps 23 and the notch 25 serve to provide deformation space for the circular ring under pressure. The deformation gap 23 extends from the central threaded hole 24 to the edge of the circular ring but does not penetrate the side wall of the circular ring. The purpose is to ensure the structural integrity of the clamping piece 2 and prevent it from breaking at the deformation gap 23. The width of the two deformation gaps 23 and the width of the notch 25 are the same and uniformly distributed along the circumference of the circular ring. In this way, the clamping piece 2 can be divided into three equal-sized sector-shaped clamping blocks by using the two deformation gaps 23 and the notch 25, and the three claws 4 clamp the three sector-shaped clamping blocks respectively.

[0036] Referring to Figure 5 As shown, further, the inner wall of the central threaded hole 24 is provided with a protruding part 22 extending along the circumference of the central threaded hole 24. The protruding part 22 is disconnected at the deformation gap 23 and the notch 25. Under the pressure of the claws 4, the protruding part 22 is pressed against the outer wall 13 of the flow channel with a smaller diameter.

[0037] Further, the surface of the claw 4 is provided with a plurality of small protrusions. The claw 4 clamps the valve body 1 through the plurality of small protrusions. The small protrusions can increase the roughness of the surface of the claw 4, thereby increasing the friction between the circular ring and the claw 4 and preventing the clamping piece 2 from rotating during milling.

[0038] Further, the clamping piece 2 is composed of a resilient material such as metal. The purpose is to use the elasticity of the metal material to make the clamping piece 2 shrink and then rebound smoothly for the next time. The purpose is also to improve the mechanical life of the clamping piece 2. Embodiment

[0039] Referring to Figure 1 As shown, a safety valve valve body machining machine tool is also provided for milling the valve body 1. The machining machine tool comprises the clamping tool, a highly rotating milling cutter 6, and a machine tool spindle 5 driven to rotate by a motor. The milling cutter 6 is used for cutting the valve body 1. The machine tool spindle 5 and the rotating part 3 are coaxially connected by bolts. The machine tool spindle 5 is used to drive the rotating part 3, the clamping piece 2, and the valve body 1 to rotate. In this way, under the condition that the angle of the milling cutter 6 is fixed, the six milling points of the valve body 1 can be aligned with the milling cutter 6 in turn, and the milling of the six supporting surfaces can be completed in turn. This avoids frequent disassembly, rotation, and clamping of the valve body 1 by hand, greatly improving the milling efficiency.

[0040] The working principle of the clamping tool and the safety valve body machining machine tool is:

[0041] The rotating part 3 of the clamping tool is coaxially connected with the machine tool spindle 5 through a bolt to complete assembly, then the valve body 1 to be machined is placed between the three clamping claws 4, the position of the clamping claw 4 is adjusted through the sliding block to make the three clamping claws 4 uniformly press and clamp the outer wall of the clamping part 2, then the sliding block is fixed on the T-shaped sliding groove through a bolt to prevent the sliding block from loosening, then the high-speed rotating milling cutter 6 starts to mill the valve body 1, when the milling cutter 6 mills the first supporting surface at the first milling point, the machine tool spindle 5 rotates an angle to drive the second milling point of the valve body 1 to rotate to the lower side of the milling cutter 6 to continue milling, until six supporting surfaces are completed, to avoid the defect that the valve body 1 is disassembled once for each milling of a supporting surface.

[0042] Obviously, the above embodiments are only examples for clearly illustrating, and are not limited to the embodiments. For those skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, all the embodiments are not required to be exhausted, and the obvious changes or variations derived therefrom are still within the protection scope of the utility model.

Claims

1. A clamping tool for clamping a valve body, characterized in that: include, A rotating member, which is configured to be rotatable and provided with a claw; The clamping piece is provided with a central threaded hole and a notch, wherein the notch passes through the edge of the clamping piece and the central threaded hole, the central threaded hole is threadedly connected to the valve body, and the multiple claws located around the clamping piece clamp the outer wall of the clamping piece radially inward along the central threaded hole.

2. A clamping tool according to claim 1, characterized in that: The rotating member is provided with a T-shaped sliding groove, and the clamping claw is provided with a sliding block that matches the T-shaped sliding groove, and the sliding block is slidably connected to the T-shaped sliding groove.

3. A clamping tool according to claim 2, characterized in that: The slider is provided with a through hole, and the T-shaped slide groove is provided with a plurality of screw holes along its length direction. The connecting piece passes through the through hole and is threadedly connected to the screw holes.

4. A clamping tool according to claim 2, characterized in that: The rotating member is configured as a disc, and the T-shaped sliding groove extends along the radial direction of the disc.

5. A clamping tool according to claim 4, characterized in that: The disc is provided with a plurality of T-shaped sliding grooves evenly distributed along its circumference, and the plurality of T-shaped sliding grooves are all slidably connected to the clamping claws.

6. A clamping tool according to claim 4, characterized in that: The clamping member is configured as a circular ring, the central threaded hole is located at the center of the circular ring, and the circular ring is coaxially configured with the circular disk.

7. A clamping tool according to claim 6, characterized in that: The circular ring is further provided with a plurality of deformation gaps, wherein the deformation gaps extend from the central threaded hole to the edge of the circular ring, and the plurality of deformation gaps and the notches are evenly distributed along the circumference of the circular ring.

8. The clamping tool according to claim 1, characterized in that: A plurality of protrusions are arranged in an array on the surface of the claw.

9. The clamping tool according to claim 1, characterized in that: The clamping piece is composed of elastic material.

10. A safety valve body processing machine tool, characterized in that: It comprises the clamping fixture according to any one of claims 1 to 9, and further comprises a milling cutter and a machine tool spindle, wherein the milling cutter is used for cutting the valve body, and the machine tool spindle and the rotating part are coaxially connected by bolts.

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