Abrasion degree detection tool

Abstract

The utility model provides a wear degree detection tool, and relates to the technical field of monocrystalline silicon drawing. The detection tool comprises a handle part, a guide part and a contact part which are sequentially connected, the guide part and the contact part are inserted into an inner cavity of a flexible shaft head, the end face of the contact part is in contact with the end of the inner cavity of the shaft head, the guide part is matched with the inner cavity of the shaft head in shape, the detection tool further comprises a calibration part, and the calibration part comprises a minimum scale and a maximum scale. The minimum scale and the maximum scale are arranged on the guide part or the handle part, the distance between the minimum scale and the end face of the contact part is the minimum qualified value of the depth of the inner cavity of the shaft head, and the distance between the maximum scale and the end face of the contact part is the maximum qualified value of the depth of the inner cavity of the shaft head. The device is simple and quick to operate, and can quickly and accurately judge whether the shaft head is qualified or not and the abrasion degree of the shaft head.

Description

Technical Field

[0001] The utility model relates to the technical field of single crystal silicon pulling, in particular to a wear detection tool. Background Art

[0002] During the single crystal silicon pulling process, the heat shield lifting and transmission flexible shaft is an important transmission mechanism that drives the heat shield to move up and down synchronously. Its main function is to accelerate the cooling rate of the crystal rod through the temperature gradient cooling characteristics of the water-cooled heat shield, take away the heat generated during the pulling process, thereby increasing the pulling speed and reducing the cost of single crystal silicon.

[0003] In the prior art, if the flexible shaft and the shaft head are abnormal during operation (mainly due to shaft head wear), it will lead to thermal shield asynchronism, thermal shield action cessation, slow crystal rod cooling speed, lower average pulling speed, increase single crystal silicon cost, thermal shield lifting kinetic energy cessation, idling and uneven transmission, incorrect position pulse feedback and other problems. It may even cause serious problems such as the normal rise of the crucible position causing the liquid surface to contact the thermal shield, scalding the water-cooling shield, and explosion.

[0004] However, during the normal operation of single crystal silicon pulling, the heat shield flexible shaft and shaft head are concealed components, and there are no measures to detect the degree of wear of the shaft head and no abnormal judgment criteria. Utility Model Content

[0005] The utility model aims to develop a wear detection tool which is simple and quick to operate and can quickly and accurately judge whether a shaft head is qualified and the wear degree of the shaft head.

[0006] The utility model is achieved through the following technical solutions:

[0007] A wear detection tool, comprising:

[0008] A handle portion, a guide portion and a contact portion connected in sequence;

[0009] The guide part and the contact part are inserted into the inner cavity of the shaft head of the flexible shaft, the end surface of the contact part contacts the end of the inner cavity of the shaft head, and the shape of the guide part is adapted to the inner cavity of the shaft head;

[0010] The detection tooling also includes a calibration part, which includes a minimum scale and a maximum scale. The minimum scale and the maximum scale are arranged on the guide part or the handle part. The distance between the minimum scale and the end face of the contact part is the minimum qualified value of the inner cavity depth of the shaft head, and the distance between the maximum scale and the end face of the contact part is the maximum qualified value of the inner cavity depth of the shaft head.

[0011] Optionally, the handle portion, the guide portion and the contact portion are all cylindrical structures and are arranged in parallel.

[0012] Optionally, the cross-sections of the handle portion and the contact portion are located inside the cross-section of the guide portion.

[0013] Optionally, the inner cavity of the shaft head is in the shape of a regular quadrangular prism, and the guide portion is in the shape of a regular quadrangular prism that matches the inner cavity of the shaft head.

[0014] Optionally, the contact portion includes a coaxially connected cylindrical inner section and a truncated cone outer section, the inner section is coaxially connected to the guide portion, and a cross section of the inner section is an inscribed circle of a cross section of the guide portion.

[0015] Optionally, the end of the outer segment with a larger diameter is coaxially connected to the inner segment, the diameter of the larger end of the outer segment is the same as the outer diameter of the inner segment, and the angle between the generatrix and the bottom surface of the truncated cone-shaped outer segment is 68°.

[0016] Optionally, the handle portion is cylindrical and is coaxially connected to the guide portion, and the outer diameter of the handle portion is smaller than the width of the cross section of the guide portion.

[0017] Optionally, the minimum scale is an end surface where the guide portion is connected to the handle portion, and the maximum scale is a scale groove opened on the handle portion, and the scale groove is arranged along the outer wall of the handle portion.

[0018] The beneficial effects of the utility model are:

[0019] The utility model has the advantages of simple structure, low production and use costs, simple and quick operation, and when detecting the shaft head of the heat shield flexible shaft, the detection tool is inserted into the inner cavity of the shaft head, so that the contact part of the detection tool is in contact with the inner end part of the inner cavity of the shaft head, and the position of the outer end part of the shaft head on the calibration part of the detection tool is observed, so as to quickly and accurately judge whether the shaft head is qualified and the degree of wear of the shaft head, and it is convenient to replace the shaft head of the flexible shaft in time to avoid the excessive wear of the shaft head not being discovered and affecting the drawing of single crystal silicon. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application 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 application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a structural schematic diagram of the utility model;

[0022] Figure 2 for Figure 1 Left view of

[0023] Figure 3 This is a schematic diagram of the inspection tool for inspecting the shaft head. DETAILED DESCRIPTION

[0024] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0026] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0027] like Figures 1 to 3 As shown, the utility model discloses a wear detection tool, including a handle portion 100, a guide portion 200 and a contact portion 300 connected in sequence. When the detection tool detects the shaft head 400 of the flexible shaft 500, the contact portion 300 and the guide portion 200 are inserted into the inner cavity of the shaft head 400 until the end face of the contact portion 300 contacts the end of the inner cavity of the shaft head 400. During this process, the guide portion 200 contacts the inner wall of the shaft head 400 in sliding manner.

[0028] The inner cavity of the shaft head 400 is in the shape of a regular quadrangular prism, and the guide portion 200 is in the shape of a regular quadrangular prism that fits the inner portion of the shaft head 400 .

[0029] The handle portion 100 is cylindrical and is coaxially connected to the guide portion 200 . The outer diameter of the handle portion 100 is smaller than the width of the cross section of the guide portion 200 , so that the handle portion 100 can enter the shaft head 400 .

[0030] The contact portion 300 includes a cylindrical inner section 301 and a truncated cone-shaped outer section 302, the inner section 301 and the outer section 302 are coaxially connected, and the contact portion 300 is coaxially connected to the guide portion 200. The inner section 301 is connected to the guide portion 200, and the cross section of the inner section 301 is the inscribed circle of the cross section of the guide portion 200. The end of the outer section 302 with a larger diameter is coaxially connected to the inner section 301, and the diameter of the larger end of the outer section 302 is the same as the outer diameter of the inner section 301, and the angle between the generatrix of the truncated cone-shaped outer section 302 and the bottom surface is 68°.

[0031] The cross sections of the handle portion 100 and the contact portion 300 are both located inside the cross section of the guide portion 200 , that is, the guide portion 200 is the largest portion of the detection tooling, to avoid the handle portion 100 and the contact portion 300 being larger than the guide portion 200 and making it impossible to insert the detection tooling into the shaft head 400 .

[0032] The inspection tool is provided with a calibration part, which includes a minimum scale 201 and a maximum scale 101, and the minimum scale 201 and the maximum scale 101 can be provided on the guide part 200 or the handle part 100. The inspection tool is inserted into the shaft head 400, and after the contact part 300 contacts the inner end of the shaft head 400, if the outer end of the shaft head 400 is between the minimum scale 201 and the maximum scale 101 (including the minimum scale 201 and the maximum scale 101), the shaft head 400 is qualified, otherwise the shaft head 400 is unqualified.

[0033] In this embodiment, the minimum scale 201 is the end surface where the guide portion 200 and the handle portion 100 are connected, and the maximum scale 101 is a scale groove opened on the handle portion 100, and the scale groove is arranged along the circumferential outer wall of the handle portion 100.

[0034] The depth of the inner cavity of the shaft head 400 is h, the distance between the minimum scale 201 and the end face of the contact part 300 is a, and the distance between the maximum scale 101 and the end face of the contact part 300 is b. When a≤h≤b, the shaft head 400 is qualified, that is, a is the minimum qualified value of the inner cavity depth of the shaft head 400, and b is the maximum qualified value of the inner cavity depth of the shaft head 400. Conversely, if hb, the shaft head 400 is unqualified.

[0035] The utility model has a simple structure, low production and use costs, and is simple and quick to operate. When inspecting the shaft head 400 of the thermal shield flexible shaft 500, the inspection tool is inserted into the inner cavity of the shaft head 400, so that the contact portion 300 of the inspection tool is in contact with the inner end portion of the inner cavity of the shaft head 400. Then, the position of the outer end portion of the shaft head 400 on the calibration portion of the inspection tool is observed to quickly and accurately determine whether the shaft head 400 is qualified and the degree of wear of the shaft head 400, so as to facilitate timely replacement of the shaft head 400 of the flexible shaft 500, thereby avoiding excessive wear of the shaft head 400 that is not discovered and affects the drawing of single crystal silicon.

[0036] The above embodiments are only preferred embodiments of the present utility model and are not limitations on the technical solutions of the present utility model. Any technical solution that can be implemented on the basis of the above embodiments without creative work should be deemed to fall within the scope of protection of the patent of the present utility model.

Claims

1. A wear detection tool, characterized in that: include: A handle portion, a guide portion and a contact portion connected in sequence; The guide part and the contact part are inserted into the inner cavity of the shaft head of the flexible shaft, the end surface of the contact part contacts the end of the inner cavity of the shaft head, and the shape of the guide part is adapted to the inner cavity of the shaft head; The detection tooling also includes a calibration part, which includes a minimum scale and a maximum scale. The minimum scale and the maximum scale are arranged on the guide part or the handle part. The distance between the minimum scale and the end face of the contact part is the minimum qualified value of the inner cavity depth of the shaft head, and the distance between the maximum scale and the end face of the contact part is the maximum qualified value of the inner cavity depth of the shaft head.

2. The wear detection tool according to claim 1, characterized in that: The handle portion, the guide portion and the contact portion are all in columnar structures and are arranged in parallel.

3. The wear detection tool according to claim 2, characterized in that: The cross sections of the handle portion and the contact portion are located inside the cross section of the guide portion.

4. The wear detection tool according to claim 2, characterized in that: The inner cavity of the shaft head is in the shape of a regular quadrangular prism, and the guide portion is in the shape of a regular quadrangular prism matched with the inner cavity of the shaft head.

5. The wear detection tool according to claim 4, characterized in that: The contact portion comprises a coaxially connected cylindrical inner section and a truncated cone outer section, the inner section is coaxially connected to the guide portion, and the cross section of the inner section is an inscribed circle of the cross section of the guide portion.

6. The wear detection tool according to claim 5, characterized in that: The end of the outer section with a larger diameter is coaxially connected to the inner section. The diameter of the larger end of the outer section is the same as the outer diameter of the inner section. The angle between the generatrix and the bottom surface of the truncated cone-shaped outer section is 68°.

7. The wear detection tool according to claim 4, characterized in that: The handle portion is cylindrical and is coaxially connected to the guide portion, and the outer diameter of the handle portion is smaller than the width of the cross section of the guide portion.

8. The wear detection tool according to any one of claims 1 to 7, characterized in that: The minimum scale is the end surface where the guide portion is connected to the handle portion, and the maximum scale is a scale groove opened on the handle portion, and the scale groove is arranged along the outer wall of the handle portion.

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