An adjustable ruler

Abstract

The present invention discloses an adjustable ruler, which relates to the technical field of novel adjustable rulers. The present invention comprises a first fixing plate and a second fixing plate, wherein grooves are provided in the interior of the first fixing plate and the second fixing plate, and a first adjustment clamping mechanism and a second adjustment clamping mechanism are provided in the interior of the two grooves. By providing the first adjustment clamping mechanism, the size between the mounting brackets can be adjusted according to the actual widths of the left and right flanges. At the same time, the inner edge of the mounting bracket adopts a rounded corner process, which not only improves the strength of the mounting bracket itself, but also enables the mounting bracket to be installed in contact with the flange, thus solving the problem in the prior art that when other types of dimensions need to be measured, on-site surveys are required and customized devices are required. At the same time, the movable bolts are unreliable and easily get stuck, causing damage to the equipment. This reduces the efficiency of the entire customization, installation and measurement process and is also prone to damage to the equipment.

Description

Technical Field

[0001] The invention belongs to the technical field of novel adjustable rulers, and in particular relates to an adjustable ruler. Background Art

[0002] Currently, measuring the expansion and contraction length of GIS equipment bellows typically involves using a tape measure or a simple measuring device. However, GIS equipment bellows in power plants come in a variety of lengths, and tape measures are limited to measuring the bellows' deformation each time a user wishes to determine it. Furthermore, these measuring devices only capture the deformation of a specific type of bellows. Measuring other sizes requires on-site inspection and custom-made devices. Furthermore, the use of movable bolts is unreliable and prone to jamming, potentially damaging the equipment. This inefficient customization, installation, and measurement process can also lead to equipment damage. Furthermore, the entire process is time-consuming, labor-intensive, and uneconomical. Summary of the Invention

[0003] The present invention aims to provide an adjustable ruler that solves the problem of existing adjustable rulers. The simple measuring device can only measure the deformation of a certain type of bellows. When measuring other types of dimensions, on-site inspection and subsequent customization of the device are required. Furthermore, the movable bolts are unreliable and prone to getting stuck, causing damage to the equipment. This makes the entire customization, installation, and measurement process inefficient and can easily damage the equipment. Furthermore, the entire process is time-consuming, labor-intensive, and uneconomical.

[0004] To solve the above technical problems, the present invention is achieved through the following technical solutions:

[0005] The present invention provides an adjustable ruler, comprising a first fixing plate and a second fixing plate, wherein grooves are provided inside the first fixing plate and the second fixing plate, a first adjustment clamping mechanism and a second adjustment clamping mechanism are provided inside the two grooves, a vertical guide fixing mechanism is provided in the middle of the first adjustment clamping mechanism and the second adjustment clamping mechanism, a left scale is provided above the first adjustment clamping mechanism, and a right scale is provided above the second adjustment clamping mechanism, a mounting block is fixedly installed on one side of the first fixing plate, a quick release mechanism is provided on the surface of the mounting block, a portable handle is fixedly installed on one side of the quick release mechanism, a left flange and a right flange are provided below the first adjustment clamping mechanism and the second adjustment clamping mechanism, and a bellows is provided between the left flange and the right flange.

[0006] Furthermore, the first adjustment clamping mechanism and the second adjustment clamping mechanism include a first tooth plate and a second tooth plate, both of which are arranged on the inner top wall and the inner bottom wall of the groove. The middle part of the first tooth plate and the second tooth plate are meshed with gears, one side of the gear is slidably connected to a support rod, the other end of the support rod is fixedly connected to the inner wall of the groove, and the other side of the gear is fixedly installed with a drive rod.

[0007] Furthermore, the two driving rods slide through the surfaces of the first fixed plate and the second fixed plate, and a groove is provided on the surface of the driving rod, and a return spring is fixedly installed inside the groove. The surface of the driving rod is slidably connected to the limit ring, and a protrusion is fixedly installed on the inner side wall of the limit ring. One end of the return spring is fixedly installed on one side surface of the protrusion, and a limit column is fixedly installed on one side surface of the limit ring. The number of the limit columns is several, and the limit columns are distributed in a ring-shaped array on one side surface of the limit ring. The first tooth plate and the second tooth plate have limiting grooves on one side surface, and the number of the limiting grooves is several, and the limiting grooves are distributed in a ring-shaped array on the surfaces of the first tooth plate and the second tooth plate, and the limiting column is adapted to the limiting groove.

[0008] Furthermore, a connecting block is fixedly installed below the first tooth plate and the second tooth plate, and a mounting bracket is provided below the two connecting blocks. The surface of the mounting bracket is threadedly connected with a flat head screw, and one end of the flat head screw is bolted to the surface of the connecting block. There are four mounting brackets, and the surfaces of the four mounting brackets are provided with bolt grooves. The internal threads of the thread grooves are threadedly connected with a thimble bolt, and the surface of the thimble bolt is threadedly connected with a first nut. Every two mounting brackets form a group, and there are two groups of mounting brackets. A left flange and a right flange are provided inside each group of mounting brackets.

[0009] Furthermore, threaded holes are provided on the surfaces of the first fixing plate and the second fixing plate, and the number of the threaded holes is several. Slide grooves are provided on the surfaces of the first fixing plate and the second fixing plate. A clamping block is fixedly installed on the upper surface of the second tooth plate, and the clamping block slides inside the slide groove. The other ends of the two clamping blocks are fixedly installed on the lower surfaces of the left scale and the right scale. Waist-shaped holes are provided on the surfaces of the left scale and the right scale. The left scale and the right scale are respectively fixedly installed on the surfaces of the first fixing plate and the second fixing plate by hexagon socket bolts.

[0010] Furthermore, the vertical guide fixing mechanism includes a first threaded rod fixedly installed on one side of the mounting frame, first telescopic rods are fixedly installed on both sides of the surface of one side of the mounting frame, the surfaces of the outer rods of the two first telescopic rods are provided with through grooves, the surface of the inner rod of the first telescopic rod is fixedly installed with a support block, and the upper surfaces of the two support blocks are fixedly installed with a clamping plate.

[0011] Furthermore, a through hole is opened on the surface of the card plate, a first threaded rod is slidably connected inside the through hole, second nuts are threadedly connected on both sides of the surface of the first threaded rod, and two second nuts are respectively located on both sides of the card plate.

[0012] Furthermore, the quick-release mechanism includes a fixing groove fixedly opened on the surface of the mounting block, U-shaped fixing parts are clamped on both sides of the fixing groove, the upper surface and the lower surface of the two U-shaped fixing parts are provided with extrusion holes, the same portable handle is fixedly installed on one side surface of the two U-shaped fixing parts, and stabilizing rings are fixedly installed on both sides of the portable handle, and the material of the U-shaped fixing parts is plastic.

[0013] Furthermore, the mounting block is internally rotatably connected to a bidirectional threaded rod, both sides of the bidirectional threaded rod are threadedly connected to moving rings, both sides of the two moving rings are fixedly mounted with support rods, the number of the support rods is four, and a second telescopic rod is fixedly mounted on one side surface of the four support rods, a spring is provided inside the second telescopic rod, the inner rod of the second telescopic rod is adapted to the fixing groove, and a rotating column is fixedly mounted on the upper surface of the bidirectional threaded rod.

[0014] The present invention has the following beneficial effects:

[0015] 1. The first adjustment clamping mechanism allows the dimensions of the mounting brackets to be adjusted according to the actual width of the left and right flanges. The inner edges of the mounting brackets are rounded, which not only increases their strength but also allows them to fit snugly against the flanges for installation. This solves the problem of the prior art requiring on-site inspections and subsequent customization of the device when measuring other dimensions. Furthermore, the movable bolts are unreliable and prone to getting stuck, causing damage to the equipment. This reduces the efficiency of the entire customization, installation, and measurement process and can easily damage the equipment.

[0016] 2. This new device can simultaneously measure the expansion and contraction deformation of bellows from different manufacturers. At the same time, the installation method is simple, stable and reliable. The ruler has the advantages of rapidity, stability, versatility, high reliability and high safety. The device lays a technical foundation for the processing of adjustable rulers, provides effective guarantees for the efficient measurement of the expansion and contraction length of bellows, and ensures the high efficiency and economy of the measurement of the expansion and contraction length of bellows.

[0017] 3. The fixing plate is made of high-quality steel with a thickness of 10mm, a width of 22mm and a length of 150mm. The strength can meet the deformation caused by installation or equipment vibration.

[0018] 4. The ruler mounting frame and the flange are fixed with a thimble. That is, first place a ruler that is slightly larger than the flange width into the flange, tighten the threaded hole on the outer end of the flange with a thimble stud, and then fix it with a double nut after it is connected and tightened with the flange to ensure that the ruler is not affected by the vibration of the equipment and the thimble will fall off.

[0019] 5. The scale on the ruler is mounted on the mounting plate, with the scale on the left mounting block at the top and the scale on the right mounting block at the bottom. After installation, a gap is left between the two scales to prevent damage from friction between the scales. The waist-shaped holes on the scales allow adjustment to eliminate any deviation from zero after installation.

[0020] 6. By setting up a vertical guide fixing mechanism, the distance between the left flange and the right flange can be kept vertical, and the deformation of the bellows can be measured more accurately. At the same time, the bellows can be fixed after the deformation is completed, which makes it convenient for staff to record the data.

[0021] 7. The portable handle can be quickly disassembled and installed through the quick-release mechanism, making it convenient for staff to carry and hold it for measurement.

[0022] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can, without inventive effort, derive other implementation drawings based on the provided drawings.

[0024] Figure 1 It is a structural schematic diagram of the present invention;

[0025] Figure 2 This is a schematic diagram of the installation structure of the scale of the present invention;

[0026] Figure 3 It is a structural schematic diagram of the fixing plate and the scale of the present invention;

[0027] Figure 4 This is a schematic diagram of the installation structure of the ejector bolt of the present invention;

[0028] Figure 5 This is a schematic diagram of the assembled structure of the adjustable ruler of the present invention.

[0029] Figure 6This is a schematic structural diagram of the first adjusting clamping mechanism of the present invention.

[0030] Figure 7 It is a schematic diagram of the partial structure of the first adjustment clamping mechanism of the present invention.

[0031] Figure 8 It is a structural schematic diagram of the vertical guide fixing mechanism of the present invention.

[0032] Figure 9 It is a schematic structural diagram of the quick release mechanism of the present invention.

[0033] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0034] 1. First fixed plate;

[0035] 2. Second fixed plate;

[0036] 3. First adjustment clamping mechanism; 301. First tooth plate; 302. Second tooth plate; 303. Gear; 304. Drive rod; 305. Return spring; 306. Limiting ring; 307. Limiting column; 308. Mounting bracket; 309. Flat head screw; 310. Ejector bolt; 311. First nut;

[0037] 4. Second adjustment clamping mechanism;

[0038] 5. Vertical guide fixing mechanism; 501. First threaded rod; 502. First telescopic rod; 503. Clamping plate; 504. Second nut;

[0039] 6. Scale on the left;

[0040] 7. Scale on the right;

[0041] 8. Install the block;

[0042] 9. Quick release mechanism; 901. Fixing slot; 902. U-shaped fixing piece; 903. Bidirectional threaded rod; 904. Moving ring; 905. Support rod; 906. Second telescopic rod;

[0043] 10. Carrying handle; 11. Left flange; 12. Right flange; 13. Bellows; 14. Slideway. DETAILED DESCRIPTION

[0044] Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present disclosure. Rather, they are merely examples of devices consistent with certain aspects of the present disclosure, as detailed in the appended claims.

[0045] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Example

[0046] See also Figures 1 to 8 As shown, the present invention is an adjustable ruler, comprising a first fixed plate 1 and a second fixed plate 2, wherein grooves are provided inside the first fixed plate 1 and the second fixed plate 2, and a first adjustment clamping mechanism 3 and a second adjustment clamping mechanism 4 are provided inside the two grooves, a vertical guide fixing mechanism 5 is provided in the middle of the first adjustment clamping mechanism 3 and the second adjustment clamping mechanism 4, a left scale 6 is provided above the first adjustment clamping mechanism 3, and a right scale 7 is provided above the second adjustment clamping mechanism 4, a mounting block 8 is fixedly installed on one side of the first fixed plate 1, a quick release mechanism 9 is provided on the surface of the mounting block 8, a portable handle 10 is fixedly installed on one side of the quick release mechanism 9, a left flange 11 and a right flange 12 are provided below the first adjustment clamping mechanism 3 and the second adjustment clamping mechanism 4, and a bellows 13 is provided between the left flange 11 and the right flange 12.

[0047] The staff clamps and fixes the left flange 11 through the first adjustment clamping mechanism 3, and clamps and fixes the right flange 12 through the second adjustment clamping mechanism 4. When the bellows 13 is deformed, the deformation of the bellows 13 can be measured by the left scale 6 and the right scale 7. The portable handle 10 is convenient for the staff to use the device. When it is not needed, the portable handle 10 can be removed to facilitate the staff to carry it. This new device can simultaneously measure the expansion and contraction deformation of bellows 13 from different manufacturers. At the same time, the installation method is simple, stable and reliable. The ruler has the advantages of speed, stability, versatility, high reliability and high safety. The device lays a technical foundation for the processing of adjustable rulers, provides effective guarantee for the efficient measurement of the expansion and contraction length of the bellows 13, and ensures the high efficiency and economy of the measurement of the expansion and contraction length of the bellows 13. Example

[0048] See also Figures 1 to 6As shown, the first adjustment clamping mechanism 3 and the second adjustment clamping mechanism 4 include a first tooth plate 301 and a second tooth plate 302, both of which are arranged on the top wall and the bottom wall of the groove. A gear 303 is meshed in the middle of the first tooth plate 301 and the second tooth plate 302. One side of the gear 303 is slidably connected to a support rod, and the other end of the support rod is fixedly connected to the inner wall of the groove. A driving rod 304 is fixedly installed on the other side of the gear 303. The two driving rods 304 slide through the surfaces of the first fixed plate 1 and the second fixed plate 2. A card slot is opened on the surface of the driving rod 304, and a return spring 305 is fixedly installed inside the card slot. The surface of the driving rod 304 is slidably connected to The limiting ring 306 has a protrusion fixedly installed on the inner side wall of the limiting ring 306, and one end of the return spring 305 is fixedly installed on one side surface of the protrusion. A limiting post 307 is fixedly installed on one side surface of the limiting ring 306. The number of limiting posts 307 is several, and the limiting posts 307 are distributed in an annular array on one side surface of the limiting ring 306. A limiting groove is provided on one side surface of the first tooth plate 301 and the second tooth plate 302. The number of limiting grooves is several, and the limiting grooves are distributed in an annular array on the surface of the first tooth plate 301 and the second tooth plate 302. The limiting post 307 is adapted to the limiting groove, and the lower sides of the first tooth plate 301 and the second tooth plate 302 are fixed. A connecting block is installed, and a mounting bracket 308 is provided under each of the two connecting blocks. The surface of the mounting bracket 308 is threadedly connected with a flat head screw 309, and one end of the flat head screw 309 is bolted to the surface of the connecting block. There are four mounting brackets 308, and the surfaces of the four mounting brackets 308 are provided with bolt grooves. The internal threads of the thread grooves are connected with ejector bolts 310, and the surfaces of the ejector bolts 310 are threadedly connected with first nuts 311. Every two mounting brackets 308 form a group, and there are two groups of mounting brackets 308. The interior of each group of mounting brackets 308 is provided with a left flange 11 and a right flange 12. The surfaces of the first fixing plate 1 and the second fixing plate 2 are provided with screws. There are several grooves and threaded holes. The surfaces of the first fixed plate 1 and the second fixed plate 2 are provided with a slide groove 14. A card block is fixedly installed on the upper surface of the second tooth plate 302, and the card block slides inside the slide groove 14. The other ends of the two cards are fixedly installed on the lower surfaces of the left scale 6 and the right scale 7. The surfaces of the left scale 6 and the right scale 7 are provided with waist-shaped holes. The left scale 6 and the right scale 7 are respectively fixedly installed on the surfaces of the first fixed plate 1 and the second fixed plate 2 by hexagon socket bolts. The first fixed plate 1 and the second fixed plate 2 are both made of high-quality steel with a thickness of 10 mm, a width of 22 mm and a length of 150 mm.

[0049] The staff places the device above the left flange 11 and the right flange 12, and then pulls the limiting ring 306 outward to expand the reset spring 305, and then rotates the driving rod 304, and drives the gear 303 to rotate through the driving rod 304, and drives the first gear plate 301 and the second gear plate 302 to move toward the middle through the gear 303, and drives the mounting brackets 308 on both sides below to clamp the left flange 11 and the right flange 12 through the first gear plate 301 and the second gear plate 302, and then fixes the left flange 11 and the right flange 12 together through the ejector bolt 310 and the first nut 311. The two sides of the right flange 12 are fixed, and the movement of the second tooth plate 302 drives the left scale 6 to move inside the slide 14. The size between the mounting brackets 308 can be adjusted according to the actual width of the left and right flanges. At the same time, the inner edge of the mounting bracket 308 adopts a rounded corner process, which not only improves the strength of the mounting bracket 308 itself, but also enables the mounting bracket 308 to be installed in close contact with the flange. This solves the problem of the prior art that when other types of dimensions need to be measured, on-site inspection and subsequent customization of the device are required. At the same time, the movable bolts are unreliable and easily get stuck, causing damage to the equipment. This reduces the efficiency of the entire customization, installation and measurement process and is also prone to damage to the equipment. Example

[0050] See also Figure 1 、 Figure 5 and Figure 7 As shown, the vertical guide fixing mechanism 5 includes a first threaded rod 501 fixedly mounted on one side of the mounting frame 308, and first telescopic rods 502 are fixedly mounted on both sides of the surface of one side of the mounting frame 308. The surfaces of the outer rods of the two first telescopic rods 502 are provided with through grooves, and the surfaces of the inner rods of the first telescopic rods 502 are fixedly mounted with support blocks, and the upper surfaces of the two support blocks are fixedly mounted with clamping plates 503. The surface of the clamping plates 503 is provided with through holes, and the inside of the through holes is slidably connected to the first threaded rod 501. Second nuts 504 are threadedly connected on both sides of the surface of the first threaded rod 501, and the two second nuts 504 are respectively located on both sides of the clamping plate 503.

[0051] When the bellows 13 is deformed, the distance between the left flange 11 and the right flange 12 will increase, and the length of the first telescopic rods 502 on both sides will increase, driving the support block to move, and the support block drives the clamping plate 503 to move, and then the clamping plate 503 is fixed by rotating the second nut 504 on the surface of the first threaded rod 501, so that the distance between the left flange 11 and the right flange 12 can be vertical, and the deformation amount of the bellows 13 can be measured more accurately. At the same time, the bellows 13 can be fixed after the deformation is completed, so that the staff can record the data conveniently.

[0052] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

[0053] Other embodiments of the present disclosure will readily occur to those skilled in the art after considering the specification and practicing the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, and the true scope of the present disclosure is indicated by the following claims.

Claims

1. An adjustable ruler, characterized by: The invention comprises a first fixing plate (1) and a second fixing plate (2), wherein the first fixing plate (1) and the second fixing plate (2) are both provided with grooves, wherein the first adjusting clamping mechanism (3) and the second adjusting clamping mechanism (4) are provided in the interior of the two grooves, wherein a vertical guide fixing mechanism (5) is provided in the middle of the first adjusting clamping mechanism (3) and the second adjusting clamping mechanism (4), wherein a left scale (6) is provided above the first adjusting clamping mechanism (3), and a right scale (7) is provided above the second adjusting clamping mechanism (4), wherein a mounting block (8) is fixedly mounted on one side of the first fixing plate (1), wherein a quick release mechanism (9) is provided on the surface of the mounting block (8), and wherein a portable handle (10) is fixedly mounted on one side of the quick release mechanism (9), wherein a left flange (11) and a right flange (12) are both provided below the first adjusting clamping mechanism (3) and the second adjusting clamping mechanism (4), and wherein a bellows (13) is provided between the left flange (11) and the right flange (12); The first adjusting clamping mechanism (3) and the second adjusting clamping mechanism (4) both comprise a first tooth plate (301) and a second tooth plate (302) provided on the inner top wall and the inner bottom wall of the groove, wherein a gear (303) is meshed in the middle of the first tooth plate (301) and the second tooth plate (302), one side of the gear (303) is slidably connected to a support rod, the other end of the support rod is fixedly connected to the inner side wall of the groove, and a driving rod (304) is fixedly installed on the other side of the gear (303); the two driving rods (304) slide through the surfaces of the first fixed plate (1) and the second fixed plate (2), the surfaces of the driving rods (304) are provided with a slot, the interior of the slot is fixedly installed with a return spring (305), the driving rods ( The surface of the limiting ring (304) is slidably connected to the limiting ring (306), the inner side wall of the limiting ring (306) is fixedly installed with a protrusion, one end of the return spring (305) is fixedly installed on the side surface of the protrusion, and a limiting column (307) is fixedly installed on the side surface of the limiting ring (306). The number of the limiting columns (307) is several, and the limiting columns (307) are distributed in an annular array on the side surface of the limiting ring (306). The first tooth plate (301) and the second tooth plate (302) are provided with limiting grooves on one side surface. The number of the limiting grooves is several, and the limiting grooves are distributed in an annular array on the surfaces of the first tooth plate (301) and the second tooth plate (302), and the limiting columns (307) are adapted to the limiting grooves; A connecting block is fixedly installed below the first tooth plate (301) and the second tooth plate (302), and a mounting frame (308) is provided below the two connecting blocks. The surface of the mounting frame (308) is threadedly connected to a flat head screw (309), and one end of the flat head screw (309) is bolted to the surface of the connecting block. There are four mounting frames (308), and the surfaces of the four mounting frames (308) are each provided with a bolt groove. The interior of the bolt groove is threadedly connected to a thimble bolt (310), and the surface of the thimble bolt (310) is threadedly connected to a first nut (311). Every two mounting frames (308) form a group, and there are two groups of mounting frames (308). The interior of each group of mounting frames (308) is provided with a left flange (11) and a right flange (12).

2. The adjustable ruler according to claim 1, characterized in that: The surfaces of the first fixing plate (1) and the second fixing plate (2) are both provided with threaded holes, and the number of the threaded holes is several. The surfaces of the first fixing plate (1) and the second fixing plate (2) are both provided with sliding grooves (14). A clamping block is fixedly installed on the upper surface of the second tooth plate (302), and the clamping block slides inside the sliding groove (14). The other ends of the two clamping blocks are fixedly installed on the lower surfaces of the left scale (6) and the right scale (7). The surfaces of the left scale (6) and the right scale (7) are both provided with waist-shaped holes. The left scale (6) and the right scale (7) are respectively fixedly installed on the surfaces of the first fixing plate (1) and the second fixing plate (2) by hexagon socket bolts. The first fixing plate (1) and the second fixing plate (2) are both made of steel with a thickness of 10 mm, a width of 22 mm and a length of 150 mm.

3. The adjustable ruler according to claim 1, characterized in that: The vertical guide fixing mechanism (5) comprises a first threaded rod (501) fixedly mounted on one side of the mounting frame (308), first telescopic rods (502) fixedly mounted on both sides of the surface of one side of the mounting frame (308), through grooves being provided on the surfaces of the outer rods of the two first telescopic rods (502), support blocks fixedly mounted on the surface of the inner rod of the first telescopic rod (502), and clamping plates (503) fixedly mounted on the upper surfaces of the two support blocks.

4. The adjustable ruler according to claim 3, characterized in that: A through hole is provided on the surface of the clamping plate (503), a first threaded rod (501) is slidably connected inside the through hole, and second nuts (504) are threadedly connected on both sides of the surface of the first threaded rod (501), and the two second nuts (504) are respectively located on both sides of the clamping plate (503).

5. The adjustable ruler according to claim 1, characterized in that: The quick-release mechanism (9) comprises a fixing groove (901) fixedly provided on the surface of the mounting block (8), U-shaped fixing members (902) are clamped on both sides of the fixing groove (901), and extrusion holes are provided on the upper and lower surfaces of the two U-shaped fixing members (902). The same portable handle (10) is fixedly installed on one side surface of the two U-shaped fixing members (902), and stabilizing rings are fixedly installed on both sides of the portable handle (10). The material of the U-shaped fixing member (902) is plastic.

6. The adjustable ruler according to claim 5, characterized in that: The mounting block (8) is internally rotatably connected to a bidirectional threaded rod (903), both sides of which are threadedly connected to movable rings (904), and both sides of the two movable rings (904) are fixedly mounted with support rods (905), the number of the support rods (905) being four, and a second telescopic rod (906) is fixedly mounted on one side surface of each of the four support rods (905), a spring being provided inside the second telescopic rod (906), an inner rod of the second telescopic rod (906) being adapted to the fixed groove (901), and a rotating column being fixedly mounted on the upper surface of the bidirectional threaded rod (903).

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