CN218896060U

CN218896060U - Polyacrylonitrile-based precursor cross-section morphology detection clamp

Info

Publication number: CN218896060U
Application number: CN202222603289.9U
Authority: CN
Inventors: 张赟; 李旭东; 雷爱民; 李学刚; 段瑞云; 武建鹏; 王云生
Original assignee: Shanxi Gangke Carbon Materials Co Ltd
Current assignee: Shanxi Gangke Carbon Materials Co Ltd
Priority date: 2022-09-30
Filing date: 2022-09-30
Publication date: 2023-04-21
Anticipated expiration: 2032-09-30

Abstract

The utility model provides a polyacrylonitrile-based precursor section appearance detection clamp which comprises a fixed seat and a movable plugboard, wherein a first side surface of the fixed seat is a cutting guide plane for guiding a cutting track of a cutting tool, the top surface of the fixed seat is provided with a downward concave mounting groove, a filament discharging hole communicated with the cutting guide plane is formed in the bottom wall of the mounting groove, the filament discharging hole is used for placing a polyacrylonitrile-based precursor, and the movable plugboard is detachably assembled on the bottom wall of the groove to clamp the polyacrylonitrile-based precursor placed in the filament discharging hole. The whole cutting guide plane is a plane, so that the cutting guide plane has higher flatness through machining, does not have steps or pits formed by assembly joints, effectively avoids the damage threat phenomenon to a cutting tool in the cutting process of the precursor, and can enable the cutting process of the precursor to be smoother, further ensure that the profile cutting of the cross section of the precursor is more regular and reduce detection errors.

Description

Polyacrylonitrile-based precursor cross-section morphology detection clamp

Technical Field

The utility model belongs to the technical field of design of a precursor cross-section appearance detection tool, and particularly relates to a polyacrylonitrile-based precursor cross-section appearance detection clamp.

Background

In the production process of the polyacrylonitrile carbon fiber, a polyacrylonitrile-based precursor (hereinafter referred to as a precursor for short) is an important link in the whole production process of the polyacrylonitrile carbon fiber, and is also a key product for starting up and down in the production process of the carbon fiber. The precursor fiber of the high-performance carbon fiber is used as the precursor fiber of the high-performance carbon fiber, the quality of the precursor fiber directly affects the quality of the carbon fiber, the precursor fiber is a bottleneck for restricting the development of the carbon fiber, and the improvement of the quality and stability of the precursor fiber is a precondition for preparing the high-performance carbon fiber, so that the appearance of the precursor fiber is monitored in real time, the process parameters can be adjusted in time, and the scientific research production can be guided.

The patent document with publication number CN 102169096A discloses a method and a clamp for detecting the cross-sectional morphology of a polyacrylonitrile-based precursor, wherein the clamp specifically discloses a clamp for detecting the cross-sectional morphology of a polyacrylonitrile-based precursor, which is formed by combining a fixed plate and a movable plugboard which are aligned through a chute, wherein one plane (defined as a shredding side) is formed on the same side of the fixed plate and the movable plugboard, the polyacrylonitrile-based precursor is clamped between the fixed plate and the movable plugboard, and then a cutting knife (generally a surgical knife) is adopted to cut the polyacrylonitrile-based precursor along the shredding side to form the cross-sectional morphology of the precursor to be detected, but in the operation process, the inventor finds that, after the fixed plate and the movable plugboard are combined to clamp the precursor, a seam is formed on the shredding side, the size of the seam is influenced by the machining precision of the side corresponding to the fixed plate, the movable plugboard and the shredding side, and the machining precision of the chute, the seam cannot ensure the flatness, and further uneven defects such as steps and pits are formed, which have adverse effects on the cutting process of the cutting knife edge of the cutting knife on one hand, and on the other hand, the cutting edge of the cutting knife has damage threat, and irregular cross-sectional morphology of the polyacrylonitrile-based precursor is detected.

Disclosure of Invention

Therefore, the utility model provides the polyacrylonitrile-based precursor section morphology detection clamp, which can solve the technical problems that the damage threat is caused to the cutting edge of a cutting knife, the precursor section morphology cutting is irregular and the detection error is larger due to the seam after the combination of the fixed plate and the movable plugboard on the shredding side surface of the precursor section morphology detection clamp in the prior art.

In order to solve the problems, the utility model provides a polyacrylonitrile-based precursor section appearance detection clamp which comprises a fixed seat and a movable plugboard, wherein a first side surface of the fixed seat is a cutting guide plane for guiding a cutting track of a cutting tool, a mounting groove which is sunken downwards is formed in the top surface of the fixed seat, a filament discharge hole which penetrates through the cutting guide plane is formed in the bottom wall of the mounting groove, the filament discharge hole is used for placing a polyacrylonitrile-based precursor, and the movable plugboard is detachably assembled on the bottom wall of the groove to clamp the polyacrylonitrile-based precursor placed in the filament discharge hole.

In some embodiments, the mounting slot includes a first slot riser parallel to the cutting guide plane, the removable insert being slidably coupled to the first slot riser.

In some embodiments, a cutting guide standing wall is formed between the first groove standing wall and the cutting guide plane, a wire discharging channel is formed on the cutting guide standing wall, a first end of the wire discharging channel is communicated with the wire discharging hole, and a second end of the wire discharging channel is communicated with the outer edge of the cutting guide standing wall.

In some embodiments, the side of the mounting groove opposite to the first groove standing wall is an open side, and the movable plugboard is bolted to the groove bottom wall of the mounting groove through a connecting rod.

In some embodiments, the polyacrylonitrile-based precursor cross-sectional profile detection fixture further comprises a base, and the fixing base is detachably connected to the base.

In some embodiments, the base is connected to the fixing base through a fastening structure.

In some embodiments, the base has a leveling knob thereon.

In some embodiments, the base has a horizontal bubble structure thereon.

In some embodiments, when the side of the mounting groove opposite to the first groove vertical wall is an open side, a diagonal brace is detachably connected between the base and the side of the movable insertion plate away from the first groove vertical wall.

According to the polyacrylonitrile-based precursor section appearance detection clamp provided by the utility model, the first side surface of the fixing seat is the cutting guide plane, the cutting guide plane is provided with the outlet of the filament discharge hole, when the precursor is placed in the filament discharge hole and reliably clamped, the cutting tool cuts the principle extending out of the filament discharge hole from top to bottom under the guide of the cutting guide plane to form a flat section, the subsequent section appearance detection is facilitated, the cutting guide plane is integrally a plane, the cutting guide plane is ensured to have higher flatness through machining, no step or recess formed by an assembly joint is formed, the damage threat phenomenon to the cutting tool in the precursor cutting process is effectively avoided, the precursor cutting process is smoother, the precursor section appearance cutting is ensured to be more regular, and the detection error is reduced.

Drawings

FIG. 1 is a front view of a cross-sectional profile inspection jig for a polyacrylonitrile-based precursor according to an embodiment of the present utility model;

FIG. 2 is a left side view of FIG. 1;

fig. 3 is a top view of fig. 1.

The reference numerals are expressed as:

1. a fixing seat; 11. cutting the guide plane; 13. a silk discharging hole; 14. cutting the guide vertical wall; 15. a wire discharging channel; 2. a movable plugboard; 3. a connecting rod; 4. a base; 41. leveling a knob; 42. a horizontal bubble structure; 5. a diagonal support member; 6. and a fastening structure.

Detailed Description

Referring to fig. 1 to 3 in combination, according to an embodiment of the present utility model, there is provided a polyacrylonitrile-based precursor section profile detection fixture, which includes a fixing base 1 and a movable insert plate 2, wherein a first side surface of the fixing base 1 is a cutting guide plane 11 for guiding a cutting path of a cutting tool, a top surface of the fixing base 1 has a mounting groove recessed downward, a wire discharge hole 13 penetrating through the cutting guide plane 11 is configured on a groove bottom wall of the mounting groove, the wire discharge hole 13 is used for placing a polyacrylonitrile-based precursor (hereinafter referred to as a "precursor"), the movable insert plate 2 is detachably assembled on the groove bottom wall to form a clamp for the polyacrylonitrile-based precursor placed in the wire discharge hole 13, that is, a top portion of the wire discharge hole 13 is opened, after the precursor is placed therein, the precursor has a portion higher than the opening of the wire discharge hole 13, and after the movable insert plate 2 is assembled, both a bottom surface of the movable insert plate 2 and the wire discharge hole 13 form a reliable clamp for the precursor, it can be understood that an outlet of the wire discharge hole 13 is positioned on the cutting guide plane 11. In this technical scheme, the first side of fixing base 1 is cutting guide plane 11, have the export of putting wire hole 13 on this cutting guide plane 11, after the precursor is placed in putting wire hole 13 by reliable centre gripping, cutting tool cuts out the principle that stretches out in putting wire hole 13 outside from top to bottom under the guide of cutting guide plane 11 and forms smooth cross-section, do benefit to the detection of follow-up cross-section appearance, because cutting guide plane 11 wholly is a plane, can guarantee that it has higher planarization through the machining, do not have the step or the sunken of equipment seam formation, effectively stop the damage threat phenomenon emergence to cutting tool in the precursor cutting process, simultaneously can make the cutting process of precursor more smooth and easy, and then guarantee that precursor cross-section appearance cutting is more regular, reduce detection error. The diameter of the wire-feed opening 13 is generally slightly smaller than the diameter of the wire to be cut, based on the fact that the wire can be clamped by the movable insert plate 2, and in a preferred embodiment the diameter of the wire-feed opening 13 is 0.3cm, depending on the circumstances.

The installation groove includes the first groove standing wall parallel with cutting guide plane 11, sliding connection between activity picture peg 2 and the first groove standing wall, concretely speaking, can construct the spout that top-down led on the first groove standing wall, concretely for example, have the crimp of inwards buckling on the relative two edges of first groove standing wall respectively, form foretell spout between the crimp of two relative settings, when needs are to the primary wire centre gripping, activity picture peg 2 top-down cartridge is between two crimps, realizes the accurate quick location of activity picture peg 2 under the guide of spout to finally realize fixing to the position of activity picture peg 2 can.

A cutting guide standing wall 14 is formed between the first groove standing wall and the cutting guide plane 11, namely, the outer vertical surface of the cutting guide standing wall 14 is the upper half part of the cutting guide plane 11, the inner vertical surface of the cutting guide standing wall 14 is the first groove standing wall, a wire discharging channel 15 is formed on the cutting guide standing wall 14, the first end of the wire discharging channel 15 is communicated with the wire discharging hole 13, the second end of the wire discharging channel 15 is communicated with the outer edge of the cutting guide standing wall 14, at the moment, a wire is finally placed in the wire discharging hole 13 along the guiding direction of the wire discharging channel 15 through an opening at the second end of the wire discharging channel 15, the wire does not need to be placed in the wire discharging hole 13 in a penetrating manner, contact friction between the wire and the wall of the wire discharging hole 13 in the wire penetrating process is prevented, the appearance of the wire is damaged, and the irregular section appearance of the wire is prevented, and the detection precision is reduced.

Referring to fig. 2, the side of the installation groove opposite to the first groove vertical wall is an open side, that is, the installation groove is only provided with one first groove vertical wall and a groove bottom wall, and lacks another groove vertical wall which is arranged oppositely, so that the section shape of the installation groove is L-shaped, the assembly of the movable plugboard 2 is convenient, the movable plugboard 2 is bolted between the bottom wall of the installation groove and the groove bottom wall through the connecting rod 3, specifically, at least the tail end of the connecting rod 3 is provided with external threads, the corresponding position of the fixing seat 1 and the installation groove is provided with corresponding internal thread holes, the connecting rod 3 passes through the movable plugboard 2 to be in threaded connection with the internal thread holes, the clamping degree of the precursor can be adjusted while the connection of the movable plugboard 2 and the fixing seat 1 is realized, and the operation is simple and convenient. Referring to fig. 1, two connecting rods 3 are provided, and the two connecting rods 3 are respectively disposed at the left and right sides of the filament placing hole 13, so as to apply a more uniform clamping force to the filament.

The detection clamp in the prior art has small bottom area, and the clamp is usually cut by adopting a handheld mode, so that slight shaking of hands can be caused when force is applied to cutting, the wire clamping force is influenced, the movement track of a cutting tool is also influenced, the appearance of a section is blurred under a microscope, and the test is required to be repeated; when the handheld clamp detects, the accident that the blade cuts the hand possibly occurs, and in the daily detection test, the hand injuries of personnel with different degrees occur for many times, so that the safety factor needs to be improved. Based on the foregoing deficiency of the prior art, in a preferred embodiment, the polyacrylonitrile-based precursor section morphology detection fixture further comprises a base 4, the fixing base 1 is detachably connected to the base 4, the cutting guide plane 11 is perpendicular to the top surface of the base 4, the whole center of gravity of the fixture moves downwards through the arrangement of the base 4, the assembly formed by assembling the fixing base 1, the movable plugboard 2 and other components can be reliably and stably supported on a workbench, thereby releasing the hands of an operator, ensuring that the precursor cutting is smoother and more convenient, ensuring that the cut precursor section is regular and the morphology is clean, ensuring high detection efficiency, completely avoiding the potential hazard to the hands of the operator in the cutting process, and improving the safety. In some embodiments, the base 4 is connected to the fixing base 1 through a fastening structure 6, and the fastening structure 6 is located at an edge of the fixing base 1 and a hook and a slot on the base 4, respectively. Specifically, before cutting the precursor, the upper components such as the fixing base 1 are quickly connected to the base 4 through the buckle structure 6 after being assembled, after the vertical relation between the upper components is ensured, the precursor is cut by the cutting tool from top to bottom along the vertical direction, then the buckle connection relation of the buckle structure 6 is released, the precursor with the section clamped between the fixing base 1 and the movable plugboard 2 is placed on the objective table of the microscope for a morphology observation test, a flat view screen is found, the diameter is measured by using a software scale, and the base is only supported and positioned in the cutting process and is detached before detection, so that the detection is more flexible.

In some embodiments, the base 4 is provided with the leveling knob 41, and the levelness of the base 4 can be adjusted by operating the leveling knob 41, so that the phenomenon that errors occur when the diameter of a monofilament is measured due to the fact that the profile of the cut filament is a slope with a certain angle is effectively avoided, and the fixing base 1, particularly the cutting guide plane 11, is perpendicular to the horizontal plane. In order to adjust the absolute vertical relationship of the cutting guide plane 11 to the horizontal plane more quickly and straight, the base 4 has a horizontal bubble structure 42 thereon. The leveling knob 41 is specifically a threaded column body that can be screwed manually, and is screwed with the base 4, and by screwing the threaded column body, the relative displacement between the bottom end of the threaded column body and the bottom surface of the base 4 is realized, so that the height of one area of the base 4 is adjusted, and at least two leveling knobs 41 are provided, so that the base 4 can be leveled more quickly by combined adjustment. In a specific embodiment, the telescopic length of the leveling knob 41 is 0.5cm.

Referring to fig. 2, when the side of the installation groove opposite to the first groove vertical wall is an open side, an inclined support 5 is detachably connected between the base 4 and one side of the movable plugboard 2 far away from the first groove vertical wall, and the two ends of the inclined support 5 can be detachably connected through bolts, so that the reliability and stability of the whole fixture in the process of cutting the precursor can be ensured.

Those skilled in the art will readily appreciate that the advantageous features of the various aspects described above may be freely combined and stacked without conflict.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model. The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present utility model, and these modifications and variations should also be regarded as the scope of the utility model.

Claims

1. The utility model provides a polyacrylonitrile-based precursor cross-section appearance detection fixture, its characterized in that, includes fixing base (1), activity picture peg (2), wherein, the first side of fixing base (1) is cutting guide plane (11) that carry out the cutting track to cutting tool, the top surface of fixing base (1) has the mounting groove of undercut, be constructed on the groove diapire of mounting groove with wire releasing hole (13) that cutting guide plane (11) link up, wire releasing hole (13) are used for placing the polyacrylonitrile-based precursor, activity picture peg (2) detachably assemble in on the groove diapire with to place in wire releasing hole (13) the polyacrylonitrile-based precursor forms the centre gripping.

2. The polyacrylonitrile-based precursor cross-sectional profile detection jig according to claim 1, wherein the mounting groove comprises a first groove standing wall parallel to the cutting guide plane (11), and the movable insert plate (2) is slidably connected with the first groove standing wall.

3. The polyacrylonitrile-based precursor cross-sectional profile detection clamp according to claim 2, wherein a cutting guide standing wall (14) is formed between the first groove standing wall and the cutting guide plane (11), a wire discharging channel (15) is formed on the cutting guide standing wall (14), a first end of the wire discharging channel (15) is communicated with the wire discharging hole (13), and a second end of the wire discharging channel (15) is communicated with the outer edge of the cutting guide standing wall (14).

4. A polyacrylonitrile-based precursor cross-sectional profile detection clamp according to claim 3, wherein the side of the installation groove opposite to the first groove vertical wall is an open side, and the movable plugboard (2) is bolted with the groove bottom wall of the installation groove through a connecting rod (3).

5. The polyacrylonitrile-based precursor cross-sectional profile detection jig according to any one of claims 1 to 4, further comprising a base (4), wherein the fixing base (1) is detachably connected to the base (4).

6. The polyacrylonitrile-based precursor cross-section morphology detection clamp according to claim 5, wherein the base (4) is connected with the fixing seat (1) through a clamping structure (6).

7. The polyacrylonitrile-based precursor cross-sectional profile detection clamp according to claim 5, wherein the base (4) is provided with a leveling knob (41).

8. The polyacrylonitrile-based precursor cross-sectional profile detection fixture according to claim 5, wherein the base (4) is provided with a horizontal bubble structure (42).

9. The polyacrylonitrile-based precursor cross-sectional profile detection jig according to claim 5, wherein when the side of the installation groove opposite to the first groove standing wall is an open side, a diagonal support member (5) is detachably connected between the base (4) and the side of the movable insert plate (2) away from the first groove standing wall.