Welded steel pipe end grinding device

Abstract

The utility model belongs to the technical field of steel pipe polishing, and particularly relates to a welded steel pipe end polishing device which comprises a polishing box, a limiting groove and a sliding groove are formed in the two sides of the inner wall of the polishing box respectively, an air draft box is installed between the limiting groove and the sliding groove in a sliding mode, and an air draft nozzle is fixedly installed at the bottom of the air draft box. The threaded column is rotationally mounted in the limiting groove, and one end of the threaded column penetrates through the air draft box and the grinding box and extends to the outside; the air draft assembly is located on the air draft box and used for conducting air draft on the air draft box; a sliding groove is formed in the grinding box, the storage plate is fixedly installed in the grinding box and located above the sliding groove, a lower pressing plate is installed in the grinding box and located over the storage plate in a sliding mode, and a threaded rod and a limiting rod are rotationally installed at the top of the storage plate. And the steel pipe cannot shake, the end of the steel pipe can be polished conveniently, and chippings generated in the polishing process can be cleared away.

Description

Technical Field

[0001] The utility model belongs to the technical field of steel pipe grinding, in particular to a welding steel pipe end grinding device. Background Art

[0002] Grinding is a type of surface modification technology. It generally refers to a processing method that uses rough objects such as sandpaper containing higher hardness particles to change the physical properties of the material surface through friction. The main purpose is to obtain a specific surface roughness.

[0003] For example, a Chinese patent with publication number CN207344321U discloses a steel pipe welding and grinding device, including a shell, a handle and a chassis. The lower end of the shell is connected to a baffle, and the upper end of the shell is connected to a handle through a speed control switch. A slide groove is provided inside the shell, and a slider is provided in the slide groove. A connecting groove is provided inside the slider, and a nut is provided in the connecting groove. Beneficial effect: the user first moves the chassis through the slider provided by the steel pipe welding and grinding device, and when the distance between the pad and the grinding belt is equal to the expected grinding diameter, the slider is fixed by using the knob. During this process, the chassis will also be fixed, and then the user can use the steel pipe welding and grinding device to grind the steel pipe. During the grinding process, the user only needs to rotate and move the steel pipe welding and grinding device through the handle. The steel pipe welding and grinding device has a simple structure and is easy to use. It is a new and practical grinding device.

[0004] The above patent has the following problems:

[0005] This patent has some disadvantages when in use, such as: when this device is used to grind the end of the steel pipe before welding, the steel pipe to be grinded cannot be fixed, the steel pipe to be grinded is prone to shaking, and it is not convenient to grind the end of the steel pipe. In addition, debris will be generated during the grinding process, and the debris will fall into the grinding box and is not convenient to clean. In view of this, we propose a device for grinding the end of a welded steel pipe. Utility Model Content

[0006] The utility model aims to provide a welding steel pipe end grinding device to solve the problems raised in the above background technology.

[0007] In view of this, the utility model provides a welding steel pipe end grinding device, comprising:

[0008] A polishing box, wherein both sides of the inner wall of the polishing box are respectively provided with a limit groove and a sliding groove, an exhaust box is slidably installed between the limit groove and the sliding groove, and an exhaust nozzle is fixedly installed at the bottom of the exhaust box;

[0009] A threaded column, wherein the threaded column is rotatably mounted in the limiting groove, and one end of the threaded column passes through the exhaust box and the polishing box and extends to the outside;

[0010] An exhaust assembly, which is located on the exhaust box and is used to exhaust air from the exhaust box;

[0011] A storage plate, the storage plate is fixedly installed in the polishing box and located above the sliding groove, a lower pressure plate is slidably installed in the polishing box and directly above the storage plate, a threaded rod and a limit rod are provided on the top of the storage plate, the top ends of the threaded rod and the limit rod both pass through the lower pressure plate, a plurality of circular holes are opened on the side of the storage plate opposite to the lower pressure plate, and a round ball is rotatably installed in the circular hole.

[0012] In the technical scheme, the threaded rod is rotated by setting the storage plate and the lower pressure plate. Under the action of the thread, the rotation of the threaded rod drives the lower pressure plate to move downward and clamp the steel pipe to be polished. At the same time, the lower pressure plate will slide on the limit rod, and then the motor 2 is started. The output shaft of the motor 2 rotates to drive the grinding disc to rotate. At this time, the personnel can push the steel pipe to be polished inward, and the steel pipe to be polished slides between the storage plate and the lower pressure plate. At the same time, under the action of friction, the steel pipe will drive a number of balls to rotate in the corresponding circular holes. When the end of the steel pipe contacts the grinding disc, the end of the steel pipe can be polished to ensure that the steel pipe can be clamped between the storage plate and the lower pressure plate when the end of the steel pipe is polished, to ensure that the steel pipe will not shake when the end of the steel pipe is polished.

[0013] By means of the exhaust box and the exhaust nozzle, when the steel pipe is polished, the exhaust assembly is driven to suck the debris in the polishing box from the exhaust nozzle into the exhaust box, and the threaded column is rotated by the threaded column. Under the action of the thread, the threaded column rotates to drive the exhaust box, the exhaust nozzle and the exhaust assembly to move back and forth between the limit groove and the sliding groove, so as to move and absorb the debris, thereby cleaning the debris at different positions in the polishing box.

[0014] In the above technical solution, further, the exhaust assembly includes:

[0015] An exhaust box is fixedly mounted on one side of the exhaust box, a motor is fixedly mounted on one side of the exhaust box, an output shaft of the motor passes through the exhaust box and is fixedly mounted with a fan blade, a filter is fixedly mounted in the exhaust box and located on one side of the fan blade, a collection box is slidably mounted in the exhaust box and located below the filter, and a plurality of exhaust holes are opened on one side of the exhaust box and between the fan blade and the motor.

[0016] In this technical solution, motor one is started, and the output shaft of motor one rotates to drive the fan blades to rotate. The rotation of the fan blades can suck the debris in the grinding box into the exhaust box through the exhaust box and the exhaust nozzle. The debris then falls into the collection box for unified cleaning. Under the action of the filter, it is ensured that the debris will not contact the fan blades.

[0017] In the above technical solution, further, the output shaft of the motor 1 is rotatably connected to the exhaust box, the filtering accuracy of the filter is 0.5-100 μm, and the diameter of some of the exhaust holes is 1-2 cm.

[0018] In this technical solution, it is ensured that the output shaft of motor 1 can rotate normally on the exhaust box, that debris will not contact the fan blades, and that the filtered wind in the exhaust box can be discharged from a plurality of exhaust holes.

[0019] In the above technical solution, further, it also includes:

[0020] Motor 2 is fixedly installed on one side of the polishing box, the output shaft of motor 2 passes through one side of the polishing box and is fixedly installed with a polishing disc, and a baffle is symmetrically fixedly installed on the inner wall of the polishing box and on the top of the exhaust box.

[0021] In this technical solution, start motor 2, and the output shaft of motor 2 rotates to drive the grinding disc to rotate. The rotation of the grinding disc can grind the steel pipe; under the action of the baffle, it is ensured that the debris in the grinding will not fall into the limit groove and the sliding groove.

[0022] In the above technical solution, further, the output shaft of the second motor is rotatably connected to the polishing box, the cross-section of the baffle is a triangular structure, and the top of the baffle is inclined.

[0023] In this technical solution, it is ensured that the output shaft of the second motor can rotate normally on the grinding box, and it is ensured that the debris falling on the baffle can fall to the bottom of the inner cavity of the grinding box.

[0024] In the above technical solution, further, the threaded column is threadedly connected to the exhaust box, the threaded column is rotatably connected to the polishing box, the threaded rod is threadedly connected to the lower pressure plate, the limit rod is slidably connected to the lower pressure plate, the limit rod and the storage plate are an integrally formed structure, and the lower end of the threaded rod is rotatably connected to the storage plate.

[0025] In this technical solution, it is ensured that the rotation of the threaded column can drive the exhaust box to move forward and backward in the limit groove and the sliding groove, that the threaded column can rotate normally on the grinding box, that the rotation of the threaded rod can drive the lower pressure plate to move up and down, that the lower pressure plate can slide normally on the limit rod, that the structure of the limit rod and the storage plate is stable, and that the lower end of the threaded rod can rotate normally in the storage plate.

[0026] In the above technical solution, further, the outlet of the circular hole is smaller than the diameter of the sphere, the width of the feed port of the exhaust nozzle is 0.3-0.5 cm, and the distance between the bottom of the exhaust nozzle and the bottom of the inner cavity of the polishing box is 0.5-1 cm.

[0027] In this technical solution, it is ensured that the ball will not fall out of the round hole, and it is ensured that the exhaust nozzle can suck out the debris at the bottom of the inner cavity of the grinding box.

[0028] The beneficial effects of the utility model are:

[0029] 1. The welding steel pipe end grinding device rotates the threaded rod through the set storage plate and the lower pressure plate. Under the action of the thread, the threaded rod rotates to drive the lower pressure plate to move downward and clamp the steel pipe to be ground. At the same time, the lower pressure plate will slide on the limit rod, and then start the motor 2. The output shaft of the motor 2 rotates to drive the grinding disk to rotate. At this time, the personnel can push the steel pipe to be ground inward, and the steel pipe to be ground slides between the storage plate and the lower pressure plate. At the same time, under the action of friction, the steel pipe will drive a number of balls to rotate in the corresponding circular holes. When the end of the steel pipe contacts the grinding disk, the end of the steel pipe can be ground, ensuring that the steel pipe can be clamped between the storage plate and the lower pressure plate when the end of the steel pipe is ground, ensuring that the steel pipe will not shake when the end of the steel pipe is ground.

[0030] 2. The welding steel pipe end grinding device, through the exhaust box and the exhaust nozzle, after grinding the steel pipe, drives the exhaust assembly, and can suck the debris in the grinding box from the exhaust nozzle into the exhaust box, and rotates the threaded column through the threaded column. Under the action of the thread, the threaded column rotates to drive the exhaust box, the exhaust nozzle and the exhaust assembly to move back and forth between the limit groove and the sliding groove, so as to move and absorb the debris, and can clean up the debris at different positions in the grinding box. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is one of the overall structural diagrams of the utility model;

[0032] Figure 2 This is the second schematic diagram of the overall structure of the utility model;

[0033] Figure 3 It is a schematic diagram of the detailed internal structure of the grinding box in the utility model;

[0034] Figure 4 For this utility model Figure 3 The enlarged structural diagram at A in the middle;

[0035] Figure 5 It is a schematic diagram of the cross-sectional structure of the middle storage plate and the lower pressure plate of the utility model.

[0036] The symbols in the figure are:

[0037] 1. Grinding box; 2. Limiting groove; 3. Sliding groove; 4. Exhaust box; 5. Exhaust nozzle; 6. Threaded column; 7. Exhaust box; 8. Motor 1; 9. Fan blades; 10. Filter; 11. Collection box; 12. Storage plate; 13. Lower pressure plate; 14. Threaded rod; 15. Round hole; 16. Round ball; 17. Motor 2; 18. Grinding disc; 19. Baffle; 20. Limiting rod. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0039] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0040] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0041] It should be noted that, in the description of the present application, the orientation or positional relationship indicated by terms such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise stated, these orientation words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application; the orientation words "inside and outside" refer to the inside and outside relative to the contour of each component itself.

[0042] It should be noted that, in the present application, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be noted that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0043] Embodiment 1:

[0044] See also Figure 1 - Figure 5 As shown, this embodiment provides a welding steel pipe end grinding device, comprising:

[0045] A grinding box 1, a limit groove 2 and a sliding groove 3 are respectively provided on both sides of the inner wall of the grinding box 1, an exhaust box 4 is slidably installed between the limit groove 2 and the sliding groove 3, and an exhaust nozzle 5 is fixedly installed at the bottom of the exhaust box 4;

[0046] The threaded column 6 is rotatably mounted in the limiting groove 2, and one end of the threaded column 6 passes through the exhaust box 4 and the polishing box 1 and extends to the outside;

[0047] An exhaust component, which is located on the exhaust box 4 and is used to exhaust air from the exhaust box 4;

[0048] A storage plate 12 is fixedly installed in the polishing box 1 and is located above the sliding groove 3. A lower pressure plate 13 is slidably installed in the polishing box 1 and directly above the storage plate 12. A threaded rod 14 and a limit rod 20 are provided on the top of the storage plate 12. The top ends of the threaded rod 14 and the limit rod 20 both penetrate the lower pressure plate 13. A plurality of circular holes 15 are provided on the side of the storage plate 12 opposite to the lower pressure plate 13, and a round ball 16 is rotatably installed in the circular hole 15.

[0049] Among them, through the set storage plate 12 and the lower pressure plate 13, the threaded rod 14 is rotated. Under the action of the thread, the threaded rod 14 rotates to drive the lower pressure plate 13 to move downward and clamp the steel pipe to be polished. At the same time, the lower pressure plate 13 will slide on the limit rod 20, and then the motor 2 17 is started. The output shaft of the motor 2 17 rotates to drive the grinding disc 18 to rotate. At this time, the personnel can push the steel pipe to be polished inward, and the steel pipe to be polished slides between the storage plate 12 and the lower pressure plate 13. At the same time, under the action of friction, the steel pipe will drive a number of balls 16 to rotate in the corresponding circular holes 15. When the end of the steel pipe contacts the grinding disc 18, the end of the steel pipe can be polished to ensure that the steel pipe can be clamped between the storage plate 12 and the lower pressure plate 13 when the end of the steel pipe is polished, to ensure that the steel pipe will not shake when the end of the steel pipe is polished.

[0050] By setting the exhaust box 4 and the exhaust nozzle 5, when the steel pipe is polished, the exhaust assembly is driven to suck the debris in the polishing box 1 from the exhaust nozzle 5 into the exhaust box 4, and the threaded column 6 is set to rotate the threaded column 6. Under the action of the thread, the threaded column 6 rotates to drive the exhaust box 4, the exhaust nozzle 5 and the exhaust assembly to move back and forth between the limit groove 2 and the sliding groove 3, so as to move and absorb the debris, so that the debris at different positions in the polishing box 1 can be cleaned.

[0051] Embodiment 2:

[0052] This embodiment provides a welding steel pipe end grinding device, which, in addition to the technical solutions of the above embodiments, also has the following technical features, and the exhaust assembly includes:

[0053] The exhaust box 7 is fixedly mounted on one side of the exhaust box 4, a motor 8 is fixedly mounted on one side of the exhaust box 7, the output shaft of the motor 8 passes through the exhaust box 7 and is fixedly mounted with a fan blade 9, a filter screen 10 is fixedly mounted in the exhaust box 7 and located on one side of the fan blade 9, a collecting box 11 is slidably mounted in the exhaust box 7 and located below the filter screen 10, and a plurality of exhaust holes are opened on one side of the exhaust box 7 and between the fan blade 9 and the motor 8.

[0054] Among them, the motor 8 is started, and the output shaft of the motor 8 rotates to drive the fan blades 9 to rotate. The rotation of the fan blades 9 can suck the debris in the grinding box 1 into the exhaust box 7 through the exhaust box 4 and the exhaust nozzle 5, and then the debris falls into the collection box 11 for unified cleaning. Under the action of the filter 10, it is ensured that the debris will not contact the fan blades 9.

[0055] Embodiment 3:

[0056] This embodiment provides a welding steel pipe end grinding device, which, in addition to the technical solutions of the above embodiments, also has the following technical features: the output shaft of the motor 8 is rotatably connected to the exhaust box 7, the filtering accuracy of the filter 10 is 0.5-100μm, and the diameter of the plurality of exhaust holes is 1-2cm.

[0057] Among them, it is ensured that the output shaft of the motor 8 can rotate normally on the exhaust box 7, that the debris will not contact the fan blades 9, and that the filtered wind in the exhaust box 7 can be discharged from a plurality of exhaust holes.

[0058] Embodiment 4:

[0059] This embodiment provides a welding steel pipe end grinding device, which, in addition to the technical solutions of the above embodiments, also has the following technical features, including:

[0060] Motor 2 17, Motor 2 17 is fixedly installed on one side of the polishing box 1, the output shaft of Motor 2 17 passes through one side of the polishing box 1 and is fixedly installed with a polishing disc 18, and a baffle 19 is symmetrically fixedly installed on the inner wall of the polishing box 1 and on the top of the exhaust box 4.

[0061] Among them, the motor 2 17 is started, and the output shaft of the motor 2 17 rotates to drive the grinding disc 18 to rotate. The rotation of the grinding disc 18 can grind the steel pipe; under the action of the baffle 19, it is ensured that the debris in the grinding will not fall into the limit groove 2 and the sliding groove 3.

[0062] Embodiment 5:

[0063] The present embodiment provides a welding steel pipe end grinding device, which, in addition to the technical solutions of the above-mentioned embodiments, also has the following technical features: the output shaft of the motor 2 17 is rotatably connected to the grinding box 1, the cross-section of the baffle 19 is a triangular structure, and the top of the baffle 19 is inclined.

[0064] The output shaft of the second motor 17 is ensured to rotate normally on the polishing box 1 , and the debris falling on the baffle 19 is ensured to fall to the bottom of the inner cavity of the polishing box 1 .

[0065] Embodiment 6:

[0066] The present embodiment provides a welding steel pipe end grinding device. In addition to the technical solutions of the above-mentioned embodiments, it also has the following technical features: the threaded column 6 is threadedly connected to the exhaust box 4, the threaded column 6 is rotatably connected to the grinding box 1, the threaded rod 14 is threadedly connected to the lower pressure plate 13, the limit rod 20 is slidably connected to the lower pressure plate 13, the limit rod 20 and the storage plate 12 are an integrally formed structure, and the lower end of the threaded rod 14 is rotatably connected to the storage plate 12.

[0067] Among them, it is ensured that the rotation of the threaded column 6 can drive the exhaust box 4 to move forward and backward in the limit groove 2 and the sliding groove 3, that the threaded column 6 can rotate normally on the grinding box 1, that the rotation of the threaded rod 14 can drive the lower pressure plate 13 to move up and down, that the lower pressure plate 13 can slide normally on the limit rod 20, that the structure of the limit rod 20 and the storage plate 12 is stable, and that the lower end of the threaded rod 14 can rotate normally in the storage plate 12.

[0068] Embodiment 7:

[0069] The present embodiment provides a device for grinding the end of a welded steel pipe. In addition to the technical solutions of the above-mentioned embodiments, the device also has the following technical features: the outlet of the circular hole 15 is smaller than the diameter of the sphere 16, the width of the feed port of the exhaust nozzle 5 is 0.3-0.5 cm, and the distance between the bottom of the exhaust nozzle 5 and the bottom of the inner cavity of the grinding box 1 is 0.5-1 cm.

[0070] The round ball 16 is ensured not to fall out of the round hole 15 , so that the exhaust nozzle 5 can suck out the debris at the bottom of the inner cavity of the polishing box 1 .

[0071] It is worth mentioning that when the steel pipe is located between the placement plate 12 and the lower pressure plate 13, after being clamped by the placement plate 12 and the lower pressure plate 13, the surface of the steel pipe will rest against a number of balls 16. When grinding the end of the steel pipe, the personnel hold the tail end of the steel pipe and push the steel pipe so that the end of the steel pipe is always in contact with the grinding disc 18, ensuring that the end of the steel pipe can always be ground. At the same time, the steel pipe is prevented from shaking under the clamping action of the placement plate 12 and the lower pressure plate 13.

[0072] Working principle: first place the steel pipe to be polished between the placement plate 12 and the lower pressure plate 13, and then rotate the threaded rod 14. Under the action of the thread, the threaded rod 14 rotates to drive the lower pressure plate 13 to move downward and clamp the steel pipe to be polished. At the same time, the lower pressure plate 13 will slide on the limit rod 20, and then start the motor 2 17. The output shaft of the motor 2 17 rotates to drive the grinding disc 18 to rotate. At this time, the personnel can push the steel pipe to be polished inward, and the steel pipe to be polished slides between the placement plate 12 and the lower pressure plate 13. At the same time, under the action of friction, the steel pipe will drive a number of balls 16 to rotate in the corresponding circular holes 15. When the end of the steel pipe contacts the grinding disc 18, the end of the steel pipe can be polished to ensure that the steel pipe can be clamped between the placement plate 12 and the lower pressure plate 13 when the end of the steel pipe is polished, to ensure that the steel pipe will not shake when the end of the steel pipe is polished.

[0073] After the grinding is completed, the motor 8 is started, and the output shaft of the motor 8 rotates to drive the fan blades 9 to rotate. The rotation of the fan blades 9 can suck the debris in the grinding box 1 into the exhaust box 7 through the exhaust box 4 and the exhaust nozzle 5, and then the debris falls into the collection box 11 for unified cleaning. At the same time, the threaded column 6 is rotated. Under the action of the thread, the threaded column 6 rotates to drive the exhaust box 4, the exhaust nozzle 5, the exhaust box 7, the motor 8, the filter 10, the fan blades 9 and the collection box 11 to move back and forth between the limit slot 2 and the sliding slot 3, and move to absorb the debris, so that the debris at different positions in the grinding box 1 can be cleaned.

[0074] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A welding steel pipe end grinding device, characterized in that: include: A polishing box (1), wherein a limit groove (2) and a sliding groove (3) are respectively provided on both sides of the inner wall of the polishing box (1), an exhaust box (4) is slidably installed between the limit groove (2) and the sliding groove (3), and an exhaust nozzle (5) is fixedly installed at the bottom of the exhaust box (4); A threaded column (6), wherein the threaded column (6) is rotatably mounted in the limiting groove (2), and one end of the threaded column (6) passes through the exhaust box (4) and the polishing box (1) and extends to the outside; An exhaust assembly, the exhaust assembly being located on the exhaust box (4) and being used to exhaust air from the exhaust box (4); A storage plate (12), the storage plate (12) is fixedly installed in the polishing box (1) and is located above the sliding groove (3), a lower pressure plate (13) is slidably installed in the polishing box (1) and directly above the storage plate (12), a threaded rod (14) and a limiting rod (20) are provided on the top of the storage plate (12), the top ends of the threaded rod (14) and the limiting rod (20) both pass through the lower pressure plate (13), a plurality of circular holes (15) are opened on the side of the storage plate (12) opposite to the lower pressure plate (13), and a round ball (16) is rotatably installed in the circular hole (15).

2. A welding steel pipe end grinding device according to claim 1, characterized in that: The exhaust assembly comprises: An exhaust box (7), wherein the exhaust box (7) is fixedly mounted on one side of the exhaust box (4), a motor (8) is fixedly mounted on one side of the exhaust box (7), an output shaft of the motor (8) passes through the exhaust box (7) and is fixedly mounted with a fan blade (9), a filter (10) is fixedly mounted in the exhaust box (7) and located on one side of the fan blade (9), a collection box (11) is slidably mounted in the exhaust box (7) and located below the filter (10), and a plurality of exhaust holes are provided on one side of the exhaust box (7) and located between the fan blade (9) and the motor (8).

3. A welding steel pipe end grinding device according to claim 2, characterized in that: The output shaft of the motor 1 (8) is rotatably connected to the exhaust box (7), the filtering accuracy of the filter screen (10) is 0.5-100 μm, and the diameter of the exhaust holes is 1-2 cm.

4. A welding steel pipe end grinding device according to claim 1, characterized in that: Also includes: Motor 2 (17), the motor 2 (17) is fixedly mounted on one side of the polishing box (1), the output shaft of the motor 2 (17) passes through one side of the polishing box (1) and is fixedly mounted with a polishing disc (18), and a baffle (19) is symmetrically fixedly mounted on the inner wall of the polishing box (1) and located on the top of the exhaust box (4).

5. A welding steel pipe end grinding device according to claim 4, characterized in that: The output shaft of the second motor (17) is rotatably connected to the polishing box (1), the cross section of the baffle (19) is a triangular structure, and the top of the baffle (19) is inclined.

6. A welding steel pipe end grinding device according to claim 1, characterized in that: The threaded column (6) is threadedly connected to the exhaust box (4), the threaded column (6) is rotatably connected to the polishing box (1), the threaded rod (14) is threadedly connected to the lower pressure plate (13), the limiting rod (20) is slidably connected to the lower pressure plate (13), the limiting rod (20) and the storage plate (12) are an integrally formed structure, and the lower end of the threaded rod (14) is rotatably connected to the storage plate (12).

7. A welding steel pipe end grinding device according to claim 1, characterized in that: The outlet of the circular hole (15) is smaller than the diameter of the sphere (16), the width of the feed opening of the exhaust nozzle (5) is 0.3-0.5 cm, and the distance between the bottom of the exhaust nozzle (5) and the bottom of the inner cavity of the polishing box (1) is 0.5-1 cm.

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