CN112964859B

CN112964859B - Insulating board shrinkage factor survey marking device

Info

Publication number: CN112964859B
Application number: CN202110248894.6A
Authority: CN
Inventors: 张爱民; 杨强
Original assignee: Jiangxi Gandian Electric Co ltd
Current assignee: Jiangxi Gandian Electric Co ltd
Priority date: 2021-03-08
Filing date: 2021-03-08
Publication date: 2023-04-11
Anticipated expiration: 2041-03-08
Also published as: CN112964859A

Abstract

A marking device for measuring shrinkage rate of an insulating paperboard belongs to the technical field of production of transformer insulators and comprises an extruding part and an extending part, wherein the extending part is provided with a pair of extending parts which are respectively arranged at two ends of the extruding part. The extrusion part comprises a square block, a blade, a lug piece, a stay, a lower boss and a handle, the square block is the main body structure of the whole marking device, and the two ends of the square block are respectively provided with the blade. Four corner points at the top of the square block are respectively provided with an inclined upward lug, and a stretching part is arranged between two lugs at each end. Two ends of the top surface of the square block are respectively provided with a lower boss, and the lower bosses are provided with springs. The stretching part comprises a cylinder, an upper connecting rod, an upper boss, a shifting fork, a compression roller and a spring, the cylinder is arranged between two lug pieces at the end of the square block through a shaft pin, the upper connecting rod is obliquely connected above the cylinder, the middle part of the upper connecting rod is provided with a downward upper boss through a round rod, the spring is arranged between the upper boss and the lower boss, the shifting fork which is obliquely connected is arranged below the cylinder, and the compression roller is arranged between two support legs at the bottom of the shifting fork.

Description

Insulating board shrinkage factor measurement marking device

Technical Field

The invention belongs to the technical field of production of transformer insulators, and particularly relates to a scribing device for determining shrinkage of an insulating paperboard.

Background

The method comprises the steps of firstly cutting a plurality of samples with the width of 25mm-50mm and the length of 170 mm-175 mm, marking out marks at the positions 10-15mm away from the edges of two ends of a paperboard along the length direction, measuring the size between the two marks, then placing the samples in a drying furnace to be dried thoroughly, measuring the size between the two marks, and obtaining the ratio of the size difference before and after drying to the original size, so as to obtain the shrinkage rate of the paperboard. The line is drawn in the more loaded down with trivial details one-step operation in this test, and the current common working method is for using the knife to draw a line on the cardboard, and suitable dynamics is difficult to master on the one hand to this kind of operating mode, and on the other hand, is difficult to control the initial interval between the ruling, and then leads to the shrinkage factor to calculate more loaded down with trivial details.

Disclosure of Invention

The invention provides a scribing device for determining the shrinkage rate of an insulating paperboard, which aims to solve the problems in the background technology.

The technical problem solved by the invention is realized by adopting the following technical scheme:

the utility model provides an insulating board shrinkage factor survey marking device, includes extrusion portion and extension portion, and extension portion has a pair ofly, installs respectively at the both ends of extrusion portion, and extension portion straightens the cardboard, and extrusion portion marks the known ruling of twice interval on the cardboard. The extruding part comprises a square block, blades, lugs, supporting strips, a lower boss and a handle, the square block is a main body structure of the whole marking device, the blades are respectively arranged at two ends of the square block, and the distance between the two blades is the distance of marked lines marked on the paperboard. Four corner points at the top of the square block are respectively provided with an upward inclined lug, and an extension part is arranged between two lugs at each end. Two ends of the top surface of the square block are respectively provided with a lower boss, and the lower bosses are provided with springs. The stretching portion comprises a cylinder, an upper connecting rod, an upper boss, a shifting fork, a compression roller and a spring, the cylinder is installed between two lug pieces at the ends of the square blocks through shaft pins, the upper connecting rod is obliquely connected to the upper portion of the cylinder, the downward upper boss is arranged in the middle of the upper connecting rod through a round rod, the spring is installed between the upper boss and the lower boss, the upper connecting rod always has the upward overturning trend under the action of the spring, the shifting fork is obliquely connected to the lower portion of the cylinder, and the compression roller is installed between two support legs at the bottom of the shifting fork.

Further, the size of the block is preferably about 50mm × 150 mm.

Furthermore, both ends of the block are respectively provided with a stay which is supported on a cross rod of the shifting fork to prevent the shifting fork from infinitely turning down under the action of the spring.

Furthermore, the top of the square block is provided with a handle which is convenient for the holding and the marking operation of the whole marking device.

Further, the cylinder and the lug can rotate.

The invention has the beneficial effects that:

the device is used for the sample scribing operation of the transformer insulation paper board shrinkage rate test, the stretching part can keep the paper board to be tensioned in the whole process of the scribing operation, inaccurate scribing caused by folding or loosening of the paper board is avoided, the device is also provided with the two blades with stable spacing, the scribing spacing of repeated scribing operation can be kept stable, and the measurement of the initial scribing spacing and the calculation work of the final shrinkage rate are greatly facilitated.

Drawings

FIG. 1 is a schematic view of the present invention;

FIG. 2 is a left side view of the present invention;

FIG. 3 is an exploded view of the present invention;

in the figure: 10. the spring comprises a squeezing portion, 11 blocks, 12 blades, 13 lugs, 14 stays, 15 lower bosses, 16 handles, 20 unfolding portions, 21 cylinders, 22 upper connecting rods, 23 upper bosses, 24 shifting forks, 25 compression rollers and 26 springs.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Referring to fig. 1 to 3, the apparatus for measuring shrinkage of an insulating paperboard comprises a pressing portion 10 and a stretching portion 20, wherein the stretching portion 20 has a pair of lines respectively installed at both ends of the pressing portion 10, the stretching portion 20 straightens the paperboard, and the pressing portion 10 cuts two lines with a known interval on the paperboard.

The pressing part 10 comprises a square block 11, blades 12, lugs 13, a stay 14, a lower boss 15 and a handle 16, wherein the square block 11 is the main structure of the whole scribing device, the size of the square block 11 is preferably a block of about 50mm × 150mm, the blades 12 are respectively arranged at two ends of the square block 11, and the distance between the two blades 12 is the distance between scribed lines scribed on the paperboard, so that the initial distance of the scribed lines is stably controlled, and the subsequent calculation of the shrinkage rate is facilitated. Four corner points at the top of the block 11 are respectively provided with an upward inclined lug 13, and a stretching part 20 is arranged between two lugs 13 at each end. The two ends of the block 11 are respectively provided with a supporting bar 14, and the supporting bar 14 is used for supporting the extending part 20 and limiting the extending part 20. The block 11 is provided with a lower boss 15 at each end of the top surface, a spring 26 is arranged on the lower boss 15, the top of the block 11 is provided with a handle 16, and the handle 16 is convenient for holding and scribing operation of the whole scribing device.

The unfolding part 20 comprises a cylinder 21, an upper connecting rod 22, an upper boss 23, a shifting fork 24, a compression roller 25 and a spring 26, wherein the cylinder 21 is installed between two lugs 13 at the end of the block 11 through a shaft pin (not shown), the cylinder 21 and the lugs 13 can rotate, the upper connecting rod 22 is obliquely connected above the cylinder 21, the middle part of the upper connecting rod 22 is provided with the downward upper boss 23 through a round rod, the spring 26 is installed between the upper boss 23 and the lower boss 15, the upper connecting rod 22 always has the upward overturning trend under the action of the spring 26, the shifting fork 24 is obliquely connected below the cylinder 21, the compression roller 25 is installed between two support legs at the bottom of the shifting fork 24, and the support bar 14 is supported on a cross rod of the shifting fork 24 to prevent the shifting fork 24 from being infinitely turned downwards under the action of the spring 26.

The working principle of the invention is as follows: after the whole marking device is installed according to the attached drawing, in an initial state, under the action of a spring 26, the lower side of the unfolding portion 20 is turned downwards, the pressing roller 25 is located on the inner side and is located at a lower limit position under the support of the stay 14, the handle 16 is held by hands to tightly attach the whole marking device to the paperboard, the two pressing rollers 25 firstly contact two ends of the paperboard, the paperboard is straightened by the two pressing rollers 25 under the action of the two pressing rollers 25 along with the further downward pressing of the marking device to obtain unfolding, under the action of the spring 26, the friction force of the pressing rollers 25 on the paperboard is always kept, namely the paperboard is kept in a straightened state, along with the further downward pressing of the marking device, the blade 12 contacts the paperboard and then marks are marked on the paperboard, at the moment, the obtained regular marks and the distance between the marks are constant values, after the marking of a plurality of paperboard samples is completed, the test can be carried out, the distance after the test is measured, and the shrinkage rate of the paperboard can be easily calculated.

The above examples mainly illustrate the shrinkage rate measuring and marking device of the insulating paper board of the present invention. While only a limited number of embodiments and features have been described, those skilled in the art will recognize that the invention can be embodied in many other forms without departing from the spirit or scope thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, and various modifications and alternative arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims.

Claims

1. The utility model provides an insulating board shrinkage ratio survey marking device, including extrusion portion (10) and extension portion (20), characterized in that, extension portion (20) have a pair ofly, install respectively at the both ends of extrusion portion (10), extrusion portion (10) include square (11), blade (12), lug (13), lower boss (15), square (11) are whole marking device's major structure, a blade (12) is respectively installed at square (11) both ends, four corners in square (11) top respectively have an ascending lug (13) of slope, square (11) both ends respectively have a stay (14), stay (14) support is on the horizontal pole of shift fork (24), install extension portion (20) between two lugs (13) of every end, square (11) top surface both ends respectively have a lower boss (15), install spring (26) on lower boss (15), extension portion (20) include drum (21), go up connecting rod (22), go up boss (23), shift fork (24), compression roller (25) and spring (26), install in square (11) through the upper portion connecting rod (21) of the upper portion (23) of drum, the upper portion (21) of connecting rod (23) through the upper portion of a slope, the spring (26) is arranged between the upper boss (23) and the lower boss (15), a shifting fork (24) which is connected in an inclined mode is arranged below the cylinder (21), and a pressing roller (25) is arranged between two supporting legs at the bottom of the shifting fork (24).

2. The insulating board shrinkage measuring and scoring device according to claim 1, wherein the dice (11) are blocks of 50mm x 150mm in size.

3. The insulating board shrinkage rate measuring and marking device as claimed in claim 1, wherein the block (11) has a handle (16) at the top.

4. The apparatus for determining a shrinkage ratio of an insulating paperboard according to claim 1, wherein the cylinder (21) and the tab (13) are rotatable.