Glass tube cutting device

Abstract

The utility model relates to glass tube cutting technical field discloses a glass tube cutting device, including base, gyro wheel subassembly, baffle, cutting unit, gyro wheel subassembly is arranged on the base symmetrically, and the gyro wheel subassembly arranged symmetrically is equipped with the positioning portion for placing glass tube between, baffle connects on the base, and cutting unit is hinged on the base, and is located gyro wheel subassembly's one side, still includes elevating unit, elevating unit slidingly connects on the base, and can slide along the length direction of base, baffle is connected on the base through elevating unit, and baffle is equipped with rotatable support block, and one end of glass tube on the positioning portion is abutted on the support block, and elevating unit can drive baffle to lift to make the axis of support block and glass tube axis consistent, the utility model discloses through placing glass tube on the positioning portion, rotates under the assistance of support block to cut glass tube, can improve the stability of glass tube when rotating glass tube, conveniently cuts glass tube, improves the quality of cutting.

Description

Technical Field

[0001] This utility model relates to the field of glass tube cutting technology, specifically a glass tube cutting device. Background Technology

[0002] In the purification project of chalcogenide glass scraps, H-shaped glass tubes are loaded with quartz glass fragments. The fragments are placed on one side of the glass tube, and then the glass tube is placed in a heating furnace to heat the side with the fragments. The quartz glass inside the high-temperature glass tube will slowly liquefy. Due to the temperature difference between the left and right sides of the H-tube, the pressure between the two tubes is different. The product on the high-temperature side will slowly flow to the low-temperature side, while the impurities in the product will remain in the glass tube on the high-temperature side. This can achieve the separation of chalcogenide glass products from impurities. After cooling, the glass tube is taken out and placed on a glass tube melting device. The middle connecting part of the glass tube is melted off by melting, and the melted part is heat-sealed. Then, an empty glass tube with a small amount of impurities inside is obtained. This empty tube can be cut open, cleaned, and reused. Depending on the requirements of different products, the glass tube needs to be cut into different lengths. The existing process relies on marking the bottle body and manual cutting by eye calibration. The cut glass tube dimensions are not accurate and the cut is uneven, which affects the subsequent use effect.

[0003] In the prior art, utility model patent (CN221417012U) discloses a quartz tube cutting machine, including a cutting table, a pusher plate horizontally slidably disposed on the cutting table, a lifting frame vertically slidably disposed on the cutting table, a circular saw cutting device mounted on the lifting frame, a positioning device for positioning the quartz tube on the cutting table, a chain transmission device for driving the pusher plate to slide, and a screw lifting device for driving the lifting frame to move up and down. The positioning device includes a pair of movable frames slidably disposed on the cutting table, rotating rods respectively rotatably disposed on the two movable frames, multiple positioning wheels fixed on the rotating rods, a servo motor for driving the rotating rods to rotate, an adjustment component for adjusting and controlling the relative distance between the two movable frames, a first slider slidably disposed on one side of the pusher plate, a second positioning wheel rotatably disposed on one side of the first slider, and an adjustment component for adjusting and controlling the first slider to move up and down relative to the cutting table. This cutting machine requires the first slider and the second positioning wheel for auxiliary cutting, and its structure is complex.

[0004] Therefore, the technical problem to be solved in this case is: how to adjust the cutting length of the glass tube and better protect the glass tube. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a glass tube cutting device. This cutting device uses a positioning part formed by a roller assembly to place the glass tube, and a baffle to press against one end of the glass tube. The glass tube can rotate between the roller assemblies, and one end of the glass tube abuts against a support block. The axis of the support block is aligned with the axis of the glass tube, which can play an auxiliary role during rotation and prevent wear on one end of the glass tube during rotation, thus protecting the glass tube. Moreover, the cutting operation is convenient and simple. On the other hand, the distance between the baffle assembly and the cutting unit can be adjusted by a lifting unit that can slide along the length of the base, thereby adjusting the cutting length of the glass tube.

[0006] The technical solution of this utility model is:

[0007] A glass tube cutting device includes a base, roller assemblies, a baffle, and a cutting unit. The roller assemblies are symmetrically arranged on the base, and a positioning part for placing the glass tube is provided between the symmetrically arranged roller assemblies. The baffle is connected to the base, and the cutting unit is hinged to the base and located on one side of the roller assemblies. The device also includes a lifting unit, which is slidably connected to the base and can slide along the length of the base. The baffle is connected to the base through the lifting unit, and a rotatable support block is provided on the baffle. One end of the glass tube located on the positioning part abuts against the support block. The lifting unit can drive the baffle to rise and fall so that the axis of the support block is aligned with the axis of the glass tube.

[0008] Preferably, the cutting device further includes a sleeve that can be fitted onto one end of the glass tube, the sleeve having a positioning block whose axis is aligned with the axis of the glass tube, and a positioning groove on the support block, such that when the positioning block is located in the positioning groove, the axis of the glass tube is aligned with the axis of the positioning groove.

[0009] Preferably, the base is provided with a first slide rail, which is arranged along the width direction of the base. The roller assembly is provided with symmetrically arranged first sliders, which are slidably connected to the first slide rail. The roller assembly can slide along the length direction of the first slide rail through the first sliders. The roller assembly is provided with a first locking rod, which is located above the first slide rail. The first locking rod can abut against the first slide rail to fix the roller assembly.

[0010] Preferably, the roller assembly includes a base plate, a fixed seat, a rotating shaft, and rollers. A first locking rod is connected to the base plate, a first slider is connected to the bottom of the base plate, the fixed seat is connected to the base plate, the rotating shaft is rotatably connected to the fixed seat and arranged along the length of the base plate, the rollers are sleeved on the rotating shaft and rotate with the rotating shaft, and positioning parts are provided between the rollers on the symmetrically arranged roller assembly.

[0011] Preferably, the rotating shaft includes a first rotating shaft and a second rotating shaft, and there are four fixed seats. The first rotating shaft and the second rotating shaft are coaxially arranged and rotatably connected to the fixed seats. A gap is provided between the first rotating shaft and the second rotating shaft, and the gap is opposite to the position of the cutting unit.

[0012] Preferably, the first locking rod is a screw.

[0013] Preferably, the lifting unit includes a bracket, a slide rail, and a locking block. The bracket is slidably connected to the base and can move along the length of the base. The slide rail is fixed to the bracket. The baffle is slidably connected to the slide rail and can move along the height of the bracket. The locking block is movably connected to one side of the slide rail and can lock the baffle in the slide rail.

[0014] Preferably, the base is provided with a second slide rail and a scale. The second slide rail is arranged along the length of the base, and the scale is located on one side of the second slide rail. The bracket is provided with a second slider, a pointer, and a second locking rod. The second slider is slidably connected to the second slide rail, and the second locking rod is located at one end of the bracket. The second locking rod can be pressed against the second slide rail to fix the bracket, and the pointer is located above the scale.

[0015] Preferably, the bottom of the roller assembly is provided with a movable block, and the base is provided with a rotating block. The rotating block is connected to the movable block in a transmission manner, and the rotating block can rotate to make the symmetrically arranged roller assemblies move closer to or further away from each other.

[0016] Preferably, the rotating block includes a rotating rod, a disk, and connecting columns. The rotating rod is rotatably connected to the base, the disk is connected to the rotating rod, the connecting columns are arranged in a circumferential array on the disk, and the movable block is provided with a groove. The connecting columns are connected to the movable block through the groove.

[0017] One of the above-described technical solutions of this utility model has at least one of the following advantages or beneficial effects:

[0018] This invention uses a positioning part formed by a roller assembly to place a glass tube, and a baffle to hold one end of the glass tube in place. The glass tube can rotate between the roller assemblies, and one end of the glass tube abuts against a support block. The axis of the support block is aligned with the axis of the glass tube, which can assist in the rotation and prevent wear on one end of the glass tube during rotation, thus protecting the glass tube. Moreover, the cutting operation is convenient and simple. On the other hand, the distance between the baffle assembly and the cutting unit can be adjusted by a lifting unit that can slide along the length of the base, thereby adjusting the cutting length of the glass tube. Attached Figure Description

[0019] Figure 1 This is a perspective view of Embodiment 1 of the present utility model;

[0020] Figure 2This is a top view of Embodiment 1 of the present invention;

[0021] Figure 3 This is a front view of Embodiment 1 of the present invention;

[0022] Figure 4 This is a rear view of Embodiment 1 of the present utility model;

[0023] Figure 5 This is a side view of Embodiment 1 of the present utility model;

[0024] Figure 6 This is a cross-sectional view A of Embodiment 1 of the present invention;

[0025] Figure 7 This is a cross-sectional view B of Embodiment 1 of this utility model.

[0026] The reference numerals in the accompanying drawings are as follows: 1. Base; 2. Roller assembly; 3. Baffle; 4. Cutting unit; 5. Positioning part; 6. Lifting unit; 7. Sleeve; 8. Glass tube; 11. First slide rail; 12. Second slide rail; 13. Scale; 14. Rotating block; 21. First slider; 22. First locking rod; 23. Base plate; 24. Fixed seat; 25. Rotating shaft; 26. Roller; 27. Gap; 28. Movable block; 31. Support block; 61. Bracket; 62. Slide groove; 63. Locking block; 71. Positioning block; 141. Rotating rod; 142. Disc; 143. Connecting column; 251. First rotating shaft; 252. Second rotating shaft; 281. Groove; 311. Positioning groove; 611. Second slider; 612. Pointer; 613. Second locking rod. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Example 1

[0029] It should be noted that the glass tube 8 in this embodiment is composed of two sections, one of which has a larger diameter than the other. The end with the larger diameter that is farther away from the smaller diameter is the closed end, and the end with the smaller diameter that is farther away from the larger diameter is the open end. The glass tube 8 needs to be cut to the required length. The length referred to here is the total length of the glass tube 8, which is the total length from the closed end with the larger diameter to the open end with the smaller diameter.

[0030] Please see Figure 1-7A glass tube 8 cutting device includes a base 1, roller assembly 2, baffle 3, and cutting unit 4. The roller assembly 2 is symmetrically arranged on the base 1, and a positioning part 5 for placing the glass tube 8 is provided between the symmetrically arranged roller assemblies 2. The baffle 3 is connected to the base 1, and the cutting unit 4 is hinged to the base 1 and located on one side of the roller assembly 2. The device also includes a lifting unit 6, which is slidably connected to the base 1 and can slide along the length direction of the base 1. The baffle 3 is connected to the base 1 through the lifting unit 6, and a rotatable support block 31 is provided on the baffle 3. One end of the glass tube 8 located on the positioning part 5 abuts against the support block 31. The lifting unit 6 can drive the baffle 3 to rise and fall so that the axis of the support block 31 is aligned with the axis of the glass tube 8.

[0031] In actual operation, the operator places the glass tube 8 on the positioning part 5 between the roller assembly 2, with the open end of the glass tube 8 facing the cutting unit 4 and the closed end facing the baffle 3. The closed end of the glass tube 8 is then placed against the support block 31. The height of the baffle 3 is adjusted by the lifting unit 6, so that the axis of the support block 31 and the axis of the glass tube 8 are on the same straight line. Then, the operator swings the cutting unit 4 until it contacts the glass tube 8. Specifically, in this embodiment, the cutting unit 4 is a grinding wheel. The operator only needs to rotate the glass tube 8 to perform a circumferential cut on the glass tube 8 by the grinding wheel, thus completing the cutting of the glass tube 8. During the rotation of the glass tube 8, since the support block 31 and the glass tube 8 rotate on the same axis, the glass tube 8 will not be worn, and the support block 31 can also provide an auxiliary rotation effect. The roller assembly 2 and the baffle 3 can also make the glass tube 8 rotate more stably on the positioning part 5, so that the grinding wheel can cut the glass tube 8, making the cut more even and improving the cutting quality.

[0032] Preferably, the cutting device further includes a sleeve 7 that can be fitted onto one end of the glass tube 8. The sleeve 7 is provided with a positioning block 71, the axis of which is aligned with the axis of the glass tube 8. The support block 31 is provided with a positioning groove 311. When the positioning block 71 is located in the positioning groove 311, the axis of the glass tube 8 is aligned with the axis of the positioning groove 311.

[0033] Through the above design, the sleeve 7 in this embodiment is set according to the large diameter end of the glass tube 8. There is a corresponding sleeve 7 for different glass tubes 8. When the sleeve 7 is fitted on the glass tube 8, the axis of the positioning block 71 and the axis of the glass tube 8 are on the same straight line. When the lifting unit 6 drives the baffle 3 to rise and fall, the support block 31 will also rise and fall along with it. The positioning groove 311 will also rise and fall along with the support block 31 until the positioning block 71 is located in the positioning groove 311 and the closed end of the glass tube 8 abuts against the support block 31. This can ensure that the support block 31 can rotate coaxially with the glass tube 8 and will not wear the glass tube 8, which is beneficial to protecting the glass tube 8.

[0034] Preferably, the base 1 is provided with a first slide rail 11, which is arranged along the width direction of the base 1. The roller assembly 2 is provided with symmetrically arranged first sliders 21, which are slidably connected to the first slide rail 11. The roller assembly 2 can slide along the length direction of the first slide rail 11 through the first sliders 21. The roller assembly 2 is provided with a first locking rod 22, which is located above the first slide rail 11. The first locking rod 22 can abut against the first slide rail 11 to fix the roller assembly 2.

[0035] Through the above design, the roller assembly 2 can slide on the first slide rail 11 via the first slider 21, thereby adjusting the distance between the symmetrically arranged roller assemblies 2, allowing glass tubes 8 of different sizes to be placed. The first locking rod 22 can lock the base plate 23 onto the first slide rail 11, preventing the first slider 21 from driving the base plate 23 to slide on the first slide rail 11 by pressing against it. Specifically, the operator can also adjust the height of the axis of the glass tube 8 by adjusting the spacing of the roller assemblies 2, so that the positioning block 71 on the sleeve 7 at the closed end of the glass tube 8 aligns with the positioning groove 311, thus facilitating the operator's operation. On the other hand, by cooperating with the lifting unit 6 and adjusting the spacing of the roller assemblies 2, glass tubes 8 of a larger size range can be cut.

[0036] Preferably, the roller assembly 2 includes a base plate 23, a fixed seat 24, a rotating shaft 25, and rollers 26. A first locking rod 22 is connected to the base plate 23, a first slider 21 is connected to the bottom of the base plate 23, the fixed seat 24 is connected to the base plate 23, the rotating shaft 25 is rotatably connected to the fixed seat 24 and arranged along the length of the base plate 23, the rollers 26 are sleeved on the rotating shaft 25 and rotate with the rotating shaft 25, and a positioning part 5 is provided between the rollers 26 on the symmetrically arranged roller assembly 2.

[0037] In the above design, the base plate 23 can be slidably connected to the first slide rail 11 via the first slider 21, thereby driving the fixed seat 24 to slide. The fixed seat 24 drives the rotating shaft 25 to move, and the rotating shaft 25 drives the roller 26 to move. The roller 26 can rotate via the rotating shaft 25. The glass tube 8 is attached to the roller 26 and can rotate on the roller 26. The positioning part 5 formed between the rollers 26 can also place the glass tube 8, thereby making the glass tube 8 rotate stably on the roller 26. Specifically, in this embodiment, the first slider 21 is symmetrically arranged on both sides of the base plate 23, and the first locking rod 22 is located between the two first sliders 21. The first locking rod 22 moves downward to press the base plate 23 against the first slide rail 11 to fix the base plate 23. In particular, the first locking rod 22 can also press against the base 1 to fix the base plate 23.

[0038] Preferably, the rotating shaft 25 includes a first rotating shaft 251 and a second rotating shaft 252, and there are four fixed seats 24. The first rotating shaft 251 and the second rotating shaft 252 are coaxially arranged and rotatably connected to the fixed seats 24. A gap 27 is provided between the first rotating shaft 251 and the second rotating shaft 252, and the gap 27 is opposite to the position of the cutting unit 4.

[0039] In this embodiment, the first rotating shaft 251 is rotatably connected to two fixed seats 24 located at one end of the base plate 23, and the second rotating shaft 252 is rotatably connected to two fixed seats 24 located at the other end of the base plate 23, and they are arranged coaxially. On the other hand, since the operator needs to ensure that the cutting unit 4 is always in contact with the glass tube 8 when rotating the glass tube 8, the operator needs to apply force to the cutting unit 4. If the operator fails to stop applying force in time after the cutting is completed, the rotating shaft 25 may be damaged. Therefore, the gap 27 can avoid this situation. On the other hand, the first rotating shaft 251 and the second rotating shaft 252 can be used to place a long glass tube 8 without hindering the glass tube 8 from rotating on the roller 26.

[0040] Preferably, the first locking rod 22 is a screw.

[0041] In this embodiment, the first locking rod 22 is a screw rod. The first locking rod 22 is screwed onto the base plate 23. The first locking rod 22 can be driven to move downward by rotating the first locking rod 22 to press against the first slide rail 11, thereby fixing the base plate 23 and preventing the base plate 23 from sliding.

[0042] Preferably, the lifting unit 6 includes a bracket 61, a slide 62, and a locking block 63. The bracket 61 is slidably connected to the base 1 and can move along the length of the base 1. The slide 62 is fixed to the bracket 61. The baffle 3 is slidably connected in the slide 62 and can move along the height of the bracket 61. The locking block 63 is movably connected to one side of the slide 62 and can lock the baffle 3 in the slide 62.

[0043] In this embodiment, the bracket 61 is connected to the base 1, and the slide 62 is fixed to the bracket 61 by a screw and is suspended. Both the bracket 61 and the baffle 3 are located in the slide 62, and the baffle 3 can slide in the slide 62. Specifically, when the locking block 63 locks the baffle 3, the baffle 3 is fixed at a certain height position; when the locking block 63 is loose, the baffle 3 can slide relative to the bracket 61 along the height direction of the bracket 61 in the slide 62, thereby facilitating operation by the staff. It should be noted that the locking block 63 in this embodiment is a screw.

[0044] Preferably, the base 1 is provided with a second slide rail 12 and a scale 13. The second slide rail 12 is arranged along the length of the base 1, and the scale 13 is located on one side of the second slide rail 12. The bracket 61 is provided with a second slider 611, a pointer 612, and a second locking rod 613. The second slider 611 is slidably connected to the second slide rail 12, and the second locking rod 613 is located at one end of the bracket 61. The second locking rod 613 can abut against the second slide rail 12 to fix the bracket 61, and the pointer 612 is located above the scale 13.

[0045] Through the above design, the bracket 61 can slide on the second slide rail 12 via the second slider 611, and when sliding, it will drive the pointer 612 to slide, thereby changing the scale indicated by the pointer 612. Furthermore, the second locking rod 613 can move downwards to abut against the second slide rail 12, thereby fixing the bracket 61. Specifically, the second locking rod 613 can also abut against the base 1. It should be noted that in this embodiment, the second locking rod 613 is a screw. Since the cutting unit 4 is hinged to the base 1, and the scale 13 is also on the base 1, the cutting line of the cutting unit 4 and the 0-degree mark of the scale 13 have a fixed length. The second slider 611 can slide on the second slide rail 12, thereby adjusting the scale line of the ruler 13 indicated by the pointer 612, thus achieving fixed-length cutting of the glass tube 8. That is, the position of the bracket 61 is adjusted according to the required length of the glass tube 8. Specifically, the length of the cutting line of the cutting unit 4 and the 0 scale line of the ruler 13 is X, and the required length of the glass tube 8 is Y. Z is obtained through YX. When Z is positive, the scale indicated by the pointer 612 is to the right of the 0 scale line, and the reading is Z; when Z is negative, the scale indicated by the pointer 612 is to the left of the 0 scale line, and the reading is the absolute value of Z.

[0046] Preferably, the bottom of the roller assembly 2 is provided with a movable block 28, and the base 1 is provided with a rotating block 14. The rotating block 14 is connected to the movable block 28 in a transmission manner, and the rotating block 14 can rotate to make the symmetrically arranged roller assemblies 2 move closer to or further away from each other.

[0047] In this embodiment, the rotating block 14 and the movable block 28 are connected by a transmission, which can be an meshing connection. When the rotating block 14 rotates, it will drive the movable block 28 to move closer or further away from each other. The movable block 28 will drive the symmetrically arranged roller assemblies 2 to move closer or further away from each other, thereby adjusting the distance between the roller assemblies 2. This allows glass tubes 8 of different sizes and specifications to be placed, and facilitates operation by the staff. Specifically, the staff can adjust the distance between the roller assemblies 2 by rotating the rotating block 14 or dragging the base plate 23 to slide on the first slide rail 11.

[0048] Preferably, the rotating block 14 includes a rotating rod 141, a disk 142, and a connecting column 143. The rotating rod 141 is rotatably connected to the base 1, the disk 142 is connected to the rotating rod 141, and the connecting column 143 is arranged in a circumferential array on the disk 142. The movable block 28 is provided with a groove 281, and the connecting column 143 is connected to the movable block 28 through the groove 281.

[0049] In this embodiment, the rotating rod 141 can rotate to drive the disk 142 to rotate around the axis of the disk 142. The disk 142 drives the connecting column 143 to rotate around the axis of the disk 142, and the connecting column 143 will drive the groove 281 to slide along the length direction of the first slide rail 11, thereby driving the movable block 28 to slide, ultimately causing the roller assembly 2 to move closer or further away from each other. In particular, the rotating block 14 and the movable block 28 in this embodiment can also be set as a gear and rack structure, so that the roller assembly 2 moves closer or further away from each other through meshing.

[0050] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A glass tube cutting device, comprising a base, roller assemblies, a baffle, and a cutting unit, wherein the roller assemblies are symmetrically arranged on the base, and a positioning part for placing a glass tube is provided between the symmetrically arranged roller assemblies; the baffle is connected to the base; and the cutting unit is hinged to the base and located on one side of the roller assemblies, characterized in that... It also includes a lifting unit, which is slidably connected to the base and can slide along the length of the base. The baffle is connected to the base through the lifting unit. The baffle is provided with a rotatable support block. One end of the glass tube located on the positioning part abuts against the support block. The lifting unit can drive the baffle to rise and fall so that the axis of the support block is aligned with the axis of the glass tube.

2. The glass tube cutting device according to claim 1, characterized in that, The cutting device further includes a sleeve that can be fitted onto one end of the glass tube. The sleeve is provided with a positioning block, the axis of which is consistent with the axis of the glass tube. The support block is provided with a positioning groove. When the positioning block is located in the positioning groove, the axis of the glass tube is consistent with the axis of the positioning groove.

3. The glass tube cutting device according to claim 1, characterized in that, The base is provided with a first slide rail, which is arranged along the width direction of the base. The roller assembly is provided with symmetrically arranged first sliders, which are slidably connected to the first slide rail. The roller assembly can slide along the length direction of the first slide rail via the first sliders. The roller assembly is provided with a first locking rod, which is located above the first slide rail. The first locking rod can abut against the first slide rail to fix the roller assembly.

4. The glass tube cutting device according to claim 3, characterized in that, The roller assembly includes a base plate, a fixed seat, a rotating shaft, and rollers. The first locking rod is connected to the base plate, the first slider is connected to the bottom of the base plate, the fixed seat is connected to the base plate, the rotating shaft is rotatably connected to the fixed seat and arranged along the length of the base plate, the rollers are sleeved on the rotating shaft and rotate with the rotating shaft, and the positioning part is provided between the rollers on the symmetrically arranged roller assembly.

5. The glass tube cutting device according to claim 4, characterized in that, The rotating shaft includes a first rotating shaft and a second rotating shaft. There are four fixed seats. The first rotating shaft and the second rotating shaft are coaxially arranged and rotatably connected to the fixed seats. There is a gap between the first rotating shaft and the second rotating shaft, and the gap is opposite to the position of the cutting unit.

6. The glass tube cutting device according to claim 3, characterized in that, The first locking rod is a screw.

7. The glass tube cutting device according to claim 1, characterized in that, The lifting unit includes a bracket, a slide rail, and a locking block. The bracket is slidably connected to the base and can move along the length of the base. The slide rail is fixed to the bracket. The baffle is slidably connected to the slide rail and can move along the height of the bracket. The locking block is movably connected to one side of the slide rail and can lock the baffle in the slide rail.

8. The glass tube cutting apparatus according to claim 7, characterized in that, The base is provided with a second slide rail and a scale. The second slide rail is arranged along the length of the base. The scale is located on one side of the second slide rail. The bracket is provided with a second slider, a pointer, and a second locking rod. The second slider is slidably connected to the second slide rail. The second locking rod is located at one end of the bracket and can be pressed against the second slide rail to fix the bracket. The pointer is located above the scale.

9. The glass tube cutting device according to claim 1, characterized in that, The roller assembly has a movable block at its bottom and a rotating block on its base. The rotating block is connected to the movable block in a transmission manner, and the rotating block can rotate to make the symmetrically arranged roller assemblies move closer to or further apart from each other.

10. The glass tube cutting apparatus according to claim 9, characterized in that, The rotating block includes a rotating rod, a disk, and a connecting column. The rotating rod is rotatably connected to the base, the disk is connected to the rotating rod, and the connecting column is arranged in a circumferential array on the disk. The movable block is provided with a groove, and the connecting column is connected to the movable block through the groove.

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