Rotary inner wall grinding device for pipe fitting

Abstract

The invention discloses a pipe fitting rotating inner wall grinding device, and belongs to the technical field of pipe fitting inner wall grinding, the pipe fitting rotating inner wall grinding device comprises a handheld part and an outer pipe, the outer pipe is rotatably mounted on the handheld part and driven by a motor mounted in the handheld part, and the outer pipe is communicated with external air exhaust equipment; the inner pipe is rotatably mounted on the handheld part and communicated with an external air pump, the inner pipe is coaxially inserted into the outer pipe, and the lower end of the inner pipe extends to the outside of the outer pipe; the polishing part is mounted between the lower end of the inner pipe and the lower end of the outer pipe; wherein during polishing, air exhaust of the outer pipe and air inflation of the inner pipe are matched with each other, so that a plurality of convex areas and a plurality of concave areas are formed on the outer surface of the polishing part, and the convex areas and the concave areas are distributed at intervals. And meanwhile, dust removal can be achieved while grinding is conducted, and a grinding area is cooled.

Description

Technical Field

[0001] The present invention relates to the technical field of inner wall grinding of pipe fittings, and particularly relates to a rotating inner wall grinding device for pipe fittings. Background Art

[0002] When producing spring rods, corresponding pipe fittings are required. These pipe fittings have high requirements for the smoothness of the inner wall during use. Traditional grinding devices mostly adopt rigid grinding heads or fixed grinding wheel structures, and the contact pressure between them and the pipe wall cannot be dynamically adjusted, easily causing local over-grinding or under-grinding. Existing technologies mostly rely on external dust suction equipment or natural sedimentation for chip removal, and cannot achieve real-time dust removal. Aluminum powder or metal chips often remain on the inner wall of electric vehicle pipe fittings, adhering to the brush or caking after cooling, resulting in a decrease in grinding accuracy. At the same time, traditional devices lack an active heat dissipation mechanism, and the local temperature rises sharply during high-speed grinding, easily causing thermal deformation of the pipe fitting material. To solve the above problems, the present invention provides a rotating inner wall grinding device for pipe fittings. Summary of the Invention

[0003] Aiming at the above existing technical deficiencies, the purpose of the present invention is to provide a rotating inner wall grinding device for pipe fittings, which can dynamically adjust the contact pressure between the grinding head and the inner wall of the pipe fitting through air pressure coordinated grinding and air flow circulation technology, and can simultaneously achieve dust removal during grinding and cool down the grinding area.

[0004] To solve the above technical problems, the present invention adopts the following technical solutions: The present invention provides a rotating inner wall grinding device for pipe fittings, including: A hand-held part; An outer tube, which is rotatably installed on the hand-held part and is driven by a motor installed inside the hand-held part. The outer tube is communicated with an external air extraction device; An inner tube, which is rotatably installed on the hand-held part, is communicated with an external air pump, coaxially inserted inside the outer tube, and the lower end of the inner tube extends to the outside of the outer tube; A grinding part, which is installed between the lower ends of the inner tube and the outer tube; Among them, during grinding, through the mutual cooperation of air extraction by the outer tube and air inflation by the inner tube, a plurality of convex areas and a plurality of concave areas are formed on the outer surface of the grinding part, and the plurality of convex areas and concave areas are distributed at intervals.

[0005] Preferably, the grinding part includes: A bladder, which is sleeved outside the lower end of the inner tube, its inner side surface is fixedly connected to the lower end surface of the inner tube, the opening is fixedly connected to the lower end surface of the outer tube, and a plurality of brushes are fixedly connected to the outer surface of the bladder; A plurality of support members, which are evenly distributed along the circumferential direction of the inner tube outside the inner tube, and one side of the support member is fixedly connected to the inner tube, and the other side is fixedly connected to the inner side wall of the bladder.

[0006] Preferably, when inflating the inner tube, the side of the support member away from the inner tube expands into an arc shape, and the thickness of the support member remains unchanged.

[0007] Preferably, the support member includes: a frame body, which is fixedly connected to the inner tube and communicates with the inner tube, and an opening is provided on the side of the frame body away from the inner tube; a spring plate, which is located at the opening of the frame body, and both ends of the spring plate are fixedly connected to the frame body. Both sides of the spring plate are folded towards the frame body and are inserted into the frame body.

[0008] Preferably, a plurality of air outlet holes are provided on both the spring plate and the bladder.

[0009] Preferably, between two adjacent frame bodies and on the bladder, a plurality of air extraction holes are provided.

[0010] Preferably, the upper end of the outer tube extends into the interior of the handheld part and is fixedly connected to a toothed ring rotatably installed inside the handheld part, and the toothed ring is meshed with a gear fixedly installed on the motor shaft of the motor.

[0011] Preferably, the upper end of the outer tube extends into the interior of the handheld part and is rotatably installed with a cover plate. A suction pipe is fixedly connected to the cover plate, and the suction pipe penetrates through the handheld part and extends to the outside of the handheld part.

[0012] Preferably, the upper end of the inner tube penetrates through the handheld part and extends to the upper end of the handheld part, and an air inlet pipe is rotatably sleeved on the upper end of the inner tube.

[0013] Preferably, a lifting handle and a control handle are respectively fixedly connected to the handheld part.

[0014] The beneficial effects of the present invention are as follows: Through the synergistic effect of air extraction by the outer tube and air inflation by the inner tube, the present invention realizes the formation of alternating convex areas and concave areas on the outer surface of the bladder during grinding, enabling the inner wall of the pipe fitting to be ground by multiple convex areas during the grinding process, and dynamically adjusting the contact pressure between the grinding head and the inner wall of the pipe fitting, avoiding the problem of uneven wear of the pipe wall caused by excessive local pressure in traditional fixed grinding devices.

[0015] The present invention is provided with air outlet holes and air extraction holes on the bladder. During grinding, the air outlet holes are located in the convex areas, and the air extraction holes are located in the concave areas, forming a two-way air flow cycle: the air outlet holes blow the grinding area to promote the shedding of waste chips, while avoiding the retention of waste chips on the brush and affecting grinding; the air extraction holes discharge the waste chips through suction, reducing dust diffusion and air pollution. The air flow cycle can also cool the grinding area to prevent material deformation caused by excessive temperature. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0017] Figure 1 It is a schematic structural diagram of a pipe fitting rotating inner wall grinding device provided by an embodiment of the present invention.

[0018] Figure 2 It is a cross-sectional view of the present invention.

[0019] Figure 3 For the present invention Figure 2 An enlarged view of part A.

[0020] Figure 4 It is a cross-sectional view of the capsule body of the present invention.

[0021] Figure 5 It is an exploded view of the capsule body, inner tube and outer tube of the present invention.

[0022] Figure 6 It is a schematic connection diagram of the frame body and the inner tube of the present invention.

[0023] Figure 7 It is an exploded view of the spring plate and the frame body of the present invention.

[0024] Figure 8 It is a cross-sectional view of the frame body of the present invention.

[0025] Figure 9 It is a schematic internal structure diagram of the handheld part of the present invention.

[0026] Explanation of reference numerals: 1. Handheld part, 2. Inner tube, 3. Outer tube, 4. Capsule body, 5. Frame body, 6. Spring plate, 7. Air outlet hole, 8. Air extraction hole, 9. Tooth ring, 10. Gear, 11. Cover plate, 12. Air extraction pipe, 13. Air inlet pipe, 14. Lifting handle, 15. Control handle, 16. Motor. Detailed implementation manners

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0028] The present invention provides a pipe fitting rotating inner wall grinding device, as Figures 1 to 9as shown

[0029] Embodiment 1: A pipe fitting rotary inner wall grinding device includes a handheld part 1, an outer pipe 3, an inner pipe 2 and a grinding part. The outer pipe 3 is driven by a motor 16 inside the handheld part 1. A gear 10 is fixed on the motor shaft of the motor 16. The gear 10 meshes with a toothed ring 9. The toothed ring 9 is fixed to the upper end of the outer pipe 3. When the motor shaft of the motor 16 rotates, the rotation of the outer pipe 3 is realized. An opening is provided at the upper end of the outer pipe 3. A cover plate 11 is rotatably installed at the opening. An air extraction pipe 12 is fixedly installed on the cover plate 11. The air extraction pipe 12 communicates with the inside of the outer pipe 3, and one end of the air extraction pipe 12 far from the cover plate 11 penetrates through the handheld part 1 and is connected to an external air extraction device. A rotary seal is provided between the cover plate 11 and the outer pipe 3.

[0030] The inner pipe 2 is coaxially inserted into the inside of the outer pipe 3. Its top end penetrates through the handheld part 1 and rotatably sleeved with an air inlet pipe 13. The air inlet pipe 13 is connected to an external air pump. A rotary seal is provided between the air inlet pipe 13 and the inner pipe 2. The lower end of the inner pipe 2 extends to the outside of the outer pipe 3.

[0031] The grinding part is installed between the lower end of the inner pipe 2 and the lower end of the outer pipe 3. When grinding, starting the motor 16 can drive the outer pipe 3 to rotate, so that the grinding part can rotate to grind the inside of the pipe.

[0032] A lifting handle 14 and a control handle 15 are respectively installed on the handheld part 1, enabling the staff to use both hands and improving the grinding stability.

[0033] Embodiment 2: On the basis of Embodiment 1, in order to improve the grinding effect, the grinding part can be arranged as follows: The grinding part includes a bladder 4 and a support member. The bladder 4 is sleeved on the outer side of the lower end of the inner pipe 2. The lower end of the inner pipe 2 is fixedly connected to the bladder 4. The open end of the bladder 4 is fixedly connected to the lower end of the outer pipe 3. Brushes are distributed on the outer surface of the bladder 4. The support members are evenly distributed along the circumference of the inner pipe 2, and the side of the support member far from the inner pipe 2 is fixedly connected to the inner side surface of the bladder 4.

[0034] During grinding, an external air pump pumps air into the inside of the inner pipe 2. At this time, the side of the support member far from the inner pipe 2 expands into an arc shape, and the thickness of the support member remains unchanged, enabling the position where the bladder 4 is connected to the support member to expand in a direction away from the axis of the inner pipe 2.

[0035] The external air extraction device extracts air from the inside of the outer pipe 3, enabling the bladder 4 between two adjacent support members to be recessed in the direction of the axis of the inner pipe 2.

[0036] When the inner tube 2 and the outer tube 3 cooperate with each other, when the bladder 4 expands into a spherical shape, its surface is divided into multiple convex regions and concave regions, and the multiple convex regions and concave regions are distributed at intervals. During the grinding process, the multiple convex regions can periodically grind the grinding area. Compared with the traditional continuous pressing and grinding method, when the multiple convex regions grind periodically, they can generate an impact force on the burrs in the grinding area, and at the same time reduce the actual contact area, which will cause the unit pressure to increase, thereby increasing the friction force and being able to quickly remove the burrs.

[0037] Moreover, by adjusting the inflation flow rate and the exhaust flow rate, the pressure between the bladder 4 and the inner wall of the pipe fitting can be dynamically adjusted, avoiding the uneven wear problem caused by excessive local pressure in the traditional fixed grinding device.

[0038] The support member includes a frame body 5. The frame body 5 is fixedly connected to the inner tube 2 and is communicated with the inner tube 2. An opening is provided on one side of the frame body 5 away from the inner tube 2. A spring plate 6 is installed at the opening of the frame body 5. Both ends of the spring plate 6 are fixedly connected to both ends of the frame body 5. Both sides of the spring plate 6 are folded towards the direction of the frame body 5 and are inserted into the slots provided on the side wall of the frame body 5. The spring plate 6 is fixedly connected to the inner side wall of the bladder 4.

[0039] During inflation, the spring plate 6 will expand into an arc shape towards the side away from the axis of the inner tube 2, so as to support the position where the bladder 4 is connected to the spring plate 6, forming a convex region.

[0040] Moreover, the inner tube 2 and the outer tube 3 are connected by the bladder 4. When the resistance received is large, the inner tube 2 and the outer tube 3 will rotate relative to each other, and the bladder 4 will generate torsion, thereby playing a buffering role and preventing the staff from being injured.

[0041] Embodiment Three: On the basis of Embodiment Two, in order to be able to clean the waste chips generated by grinding in time, a plurality of air outlet holes 7 are provided on the spring plate 6 and the bladder 4, and a plurality of air extraction holes 8 are provided on the bladder 4 between two adjacent frame bodies 5. When inflating into the inside of the inner tube 2, part of the gas is blown out through the air outlet holes 7. When extracting air from the inside of the outer tube 3, the air inside the pipe wall will be extracted through the air extraction holes 8. The air outlet holes 7 and the air extraction holes 8 cooperate with each other to form a cycle of purging air flow and suction air flow. The air flow ejected from the air outlet holes 7 will form a spiral air flow field under the negative pressure of the air extraction holes 8, and conduct the grinding heat out through the outer tube 3 to cool and lower the temperature of the grinding position, preventing the pipe fitting from thermal deformation.

[0042] The air outlet 7 is located in the convex area, which can directly impact the grinding area during the grinding process, prompting the burrs to break away, and can also prompt the waste chips ground off to separate from the brush. At the same time, the air extraction hole 8 is located in the concave area between adjacent frames 5. The outer tube 3 continuously extracts air through the air extraction pipe 12, and can suck the grinding waste chips into the inner cavity of the outer tube 3 through the air extraction hole 8 and then discharge them, avoiding the waste chips from adhering to the inner wall of the pipe fitting again and affecting the grinding effect.

[0043] Obviously, those skilled in the art can make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims

1. A pipe fitting rotating inner wall grinding device, characterized in that, Comprising: A handheld part (1); An outer tube (3), which is rotatably mounted on the handheld part (1) and is driven by a motor (16) installed inside the handheld part (1), and the outer tube (3) communicates with an external air extraction device; An inner tube (2), which is rotatably mounted on the handheld part (1), communicates with an external air pump, the inner tube (2) is coaxially inserted inside the outer tube (3), and the lower end of the inner tube (2) extends to the outside of the outer tube (3); A grinding part, which is installed between the lower ends of the inner tube (2) and the outer tube (3); Wherein, during grinding, through the mutual cooperation of air extraction by the outer tube (3) and air inflation by the inner tube (2), a plurality of convex areas and a plurality of concave areas are formed on the outer surface of the grinding part, and the plurality of convex areas and concave areas are distributed at intervals.

2. The inner wall grinding device for rotating pipe fittings according to claim 1, characterized in that, The grinding part includes: A bladder (4), which is sleeved outside the lower end of the inner tube (2), its inner side is fixedly connected to the lower end surface of the inner tube (2), the opening is fixedly connected to the lower end surface of the outer tube (3), and a plurality of brush hairs are fixedly connected to the outer surface of the bladder (4); A plurality of support members, which are evenly distributed along the circumference of the inner tube (2) on the outside of the inner tube (2), and one side of the support member is fixedly connected to the inner tube (2), and the other side is fixedly connected to the inner side wall of the bladder (4).

3. The inner wall grinding device for rotating pipe fittings according to claim 2, characterized in that, When inflating the inner tube (2), the side of the support member away from the inner tube (2) expands into an arc shape, and the thickness of the support member remains unchanged.

4. The inner wall grinding device for rotating pipe fittings according to claim 3, characterized in that, The support member includes: A frame body (5), which is fixedly connected to the inner tube (2) and communicates with the inner tube (2), and an opening is provided on the side of the frame body (5) away from the inner tube (2); A spring plate (6), which is located at the opening of the frame body (5), and both ends of the spring plate (6) are fixedly connected to the frame body (5), and both sides of the spring plate (6) are folded towards the direction of the frame body (5) and are inserted into the frame body (5).

5. The inner wall grinding device for rotating pipe fittings according to claim 4, characterized in that, A plurality of air outlet holes (7) are provided on both the spring plate (6) and the bladder (4).

6. The inner wall grinding device for rotating pipe fittings according to claim 5, characterized in that, Between adjacent two frame bodies (5), and a plurality of air extraction holes (8) are provided on the bladder (4).

7. The inner wall grinding device for rotating pipe fittings according to claim 1, characterized in that, The upper end of the outer tube (3) extends into the handheld part (1) and is fixedly connected to a toothed ring (9) rotatably mounted inside the handheld part (1), and the toothed ring (9) is meshed and connected to a gear (10) fixedly installed on the motor shaft of the motor (16).

8. The inner wall grinding device for rotating pipe fittings according to claim 1, characterized in that, The upper end of the outer tube (3) extends into the handheld part (1) and is rotatably mounted with a cover plate (11), and an air extraction pipe (12) is fixedly connected to the cover plate (11), and the air extraction pipe (12) penetrates through the handheld part (1) and extends to the outside of the handheld part (1).

9. The inner wall grinding device for rotating pipe fittings according to claim 1, characterized in that, The upper end of the inner tube (2) penetrates through the handheld part (1) and extends to the upper end of the handheld part (1), and an air inlet pipe (13) is rotatably sleeved on the upper end of the inner tube (2).

10. A pipe fitting rotating inner wall grinding device according to claim 1, characterized in that, A lifting handle (14) and a control handle (15) are respectively fixedly connected to the handheld part (1).

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