Handheld pipe inner wall rust removal tool

Abstract

The present invention discloses a handheld pipeline inner wall rust removal tool, comprising a plurality of wire brushes, a rotating body, a spiral spring coupling, a driving motor, a first hollow connecting rod, a second hollow connecting rod, a plurality of wire brush radial adjustment mechanisms, a compressed air delivery mechanism and a vacuum cleaner connecting hose, wherein the plurality of wire brushes are radially evenly distributed, one end of the rotating body is connected to one end of the driving motor shaft through a spiral spring coupling, and the other end of the driving motor is connected to the first hollow connecting rod and the second hollow connecting rod in sequence. The radial adjustment mechanism of the wire brush comprises a brush handle, a brush handle barrel and a tension spring of the wire brush, and the brush handle barrel cooperates with the lower end of the brush handle of the wire brush to form a cylinder. The present invention can complete the grinding and rust removal of the circumferential surface of the pipeline inner wall in the area where the wire brush is located at one time, significantly improves the rust removal quality of the pipeline inner wall, greatly improves the rust removal efficiency, effectively improves the air environment of the workplace, and protects the health of the on-site operators.

Description

Technical Field

[0001] The invention relates to a special tool for removing rust from the inner wall of a steel pipeline, in particular to a special tool for removing rust from the inner wall of a straight pipe with a diameter d≥60mm and a length≤2000mm or a curved pipe with only one bend, and belongs to the technical field of hardware tools. Background Art

[0002] Seamless steel pipes or welded steel pipes are the most common steel materials and are widely used in various industrial fields such as machinery, construction and chemical industry. Steel pipes can be divided into carbon steel pipes, alloy steel pipes and stainless steel pipes according to the material of the pipe. Carbon steel pipes and some alloy steel pipes that have not been treated with anti-corrosion will rust after being exposed to the air for 2-3 days. Seamless steel pipes used for pipelines need to be derusted before installation. At present, the main methods for steel pipe rust removal are physical rust removal and chemical rust removal. Physical rust removal mainly includes grinding and rust removal with special electric tools or pneumatic tools and spray (cast) rust removal. Chemical rust removal mainly includes pickling and rust removal.

[0003] The rust removal level of the inner wall of oil pipes, water pipes and compressed air delivery pipes is generally Sa2-Sa3. The existing method of grinding and rust removal of the inner wall of industrial pipes using electric tools or pneumatic tools is as follows: the electric tool or pneumatic tool held by the operator drives the wire brush or grinding wheel at the end to rotate at high speed, and the inner wall of the pipe is locally ground and rusted in different areas. The wire brush or grinding wheel rotates around the center of the pipe for one circle to complete the rust removal of a section of the cross section of the inner wall of the pipe. The rust removal quality of the inner wall of the pipe cannot be uniform when using this rust removal tool and method, and the efficiency of gradually removing the rust from the inner wall of the pipe in different areas is low and the labor intensity is high. A large amount of dust is generated during use to pollute the environment, which seriously affects the health of the operator. Summary of the invention

[0004] The purpose of the present invention is to provide a handheld pipeline inner wall rust removal tool, which can effectively remove rust or other impurities on the inner wall of the pipeline.

[0005] The present invention is achieved through the following technical solutions:

[0006] A handheld pipeline inner wall rust removal tool, comprising a plurality of wire brushes, a rotating body, a spiral spring coupling, a driving motor, a first hollow connecting rod, a second hollow connecting rod, a plurality of wire brush radial adjustment mechanisms, a compressed air delivery mechanism and a vacuum cleaner connecting hose, wherein the plurality of wire brushes are radially evenly distributed, the longitudinal top of the wire brush head of the wire brush is in an arc shape, one end of the rotating body is connected to one end of the driving motor shaft through a spiral spring coupling, and the other end of the driving motor is connected to the first hollow connecting rod and the second hollow connecting rod in sequence; the radial adjustment mechanism of the wire brush comprises a brush handle, a brush handle tube and a tension spring of the wire brush, the brush handle extends downward from the center of the brush holder of the wire brush, and the rotating body is provided with a plurality of wire brushes. Several brush handle tubes extending vertically outward are evenly distributed on the part, the stepped through hole of the brush handle tube is a square hole near the brush support, and the other end is a round hole, the brush handle tube cooperates with the lower end of the brush handle of the wire brush to form a cylinder; the plunger at the lower end of the brush handle extends into the round hole at the lower end of the brush handle tube, and is sealed by the O-ring embedded in the hole wall of the round hole; one end of the tension spring is hooked on the hanging ring at one end of the brush handle, and the other end of the tension spring is hooked on the middle part of the spring support bolt, the spring support bolt crosses the root of the brush handle tube and is fixed on the root of the brush handle tube; the airway of the compressed air delivery mechanism is connected with the stepped through hole of the brush handle tube; one end of the vacuum cleaner connecting hose is connected to one end of the second hollow connecting rod.

[0007] The purpose of the present invention can be further achieved by the following technical measures.

[0008] Furthermore, the compressed air delivery mechanism includes a rotating body air duct, a connecting hose, a driving motor shaft, a driving motor shaft connecting pipe and a compressed air hose, wherein the driving motor shaft is a hollow shaft, and the rotating body air duct includes a rotating body axial blind hole and several transverse holes, wherein the rotating body axial blind holes are respectively communicated with one end of corresponding transverse holes evenly distributed in the same cross section of the rotating body, and the other ends of the transverse holes are respectively connected to the corresponding circular holes in the brush handle tube; a stepped shaft extends from one end of the rotating body, a pipe joint at one end of the connecting hose is fixed on one end of the stepped shaft, and a pipe joint at the other end of the connecting hose is connected to one end of the driving motor shaft through a spiral spring coupling; the other end of the driving motor shaft is connected to one end of the driving motor shaft connecting pipe, and the other end of the driving motor shaft connecting pipe crosses through a rotating sealing support mechanism and is connected to a compressed air hose joint, and the other end of the compressed air hose crosses through a second hollow connecting rod and leads to a compressed air tank.

[0009] Furthermore, the square hole cross-sectional area of ​​the stepped through hole of the brush handle tube is larger than the round hole cross-sectional area of ​​the inner hole of the cylinder tube, the cube of the brush handle close to the brush holder is matched with the square hole gap, and the outer circle of the plunger of the brush handle away from the brush holder is matched with the round hole gap.

[0010] Furthermore, the stepped shaft at one end of the rotating body extends into the flange at one end of the coil spring coupling, and one end of the driving motor shaft extends into the flange at the other end of the coil spring coupling, and the two ends of the coil spring coupling are fixedly connected to the stepped shaft and one end of the driving motor shaft respectively by means of fixing screws that are symmetrically and vertically screwed into the flanges.

[0011] Furthermore, the rotary seal support mechanism is arranged between the inner hole of the first hollow connecting rod and the other end of the drive motor shaft pipe, and includes a seal ring support ring, a seal ring and a plurality of support rods, wherein the seal ring is embedded in the seal ring support ring and contains the other end of the drive motor shaft pipe, and the two ends of the plurality of evenly distributed support rods are respectively fixedly connected to the outer circle of the seal ring support ring and the inner hole of the first hollow connecting rod. The seal ring is a rotary Gray seal ring.

[0012] Furthermore, the length of the first hollow connecting rod is shorter than that of the second hollow connecting rod, and a plurality of elliptical holes are evenly distributed in the circumference of the middle portion of the tube wall of the first hollow connecting rod and in the circumference of the tube wall of the second hollow connecting rod near one end of the first hollow connecting rod.

[0013] Furthermore, the first cover is fixedly covered on the outer peripheral surface of the driving motor, the second cover is fixedly covered on the end surface of the driving motor close to the first hollow connecting rod, the first cover is longitudinally provided with a convex groove covering the power cord of the driving motor, and the flange edge at one end of the first hollow connecting rod is fixed on the second cover.

[0014] Under the action of the cylinder formed by the brush handle tube of the rotating body of the present invention and the lower end of the brush handle of the wire brush, several wire brushes evenly distributed in the radial direction are pressed against the pipe wall. When the driving motor shaft drives several wire brushes to rotate around the pipe axis, the grinding and rust removal of the circumferential surface of the inner wall of the pipe in the area where the wire brushes are located can be completed at one time. The present invention significantly improves the rust removal quality of the inner wall of the pipe and greatly improves the rust removal efficiency. The first hollow connecting rod and the second hollow connecting rod of the present invention have several elliptical holes evenly distributed on the circumference of the pipe wall, which can inhale a large amount of dust generated when the inner wall of the pipe is rusted, and inhale it into the mobile vacuum cleaner through the vacuum cleaner connecting hose, which effectively improves the atmospheric environment of the workplace and protects the health of on-site operators.

[0015] Advantages and features of the present invention will be illustrated and explained by the following non-limiting description of preferred embodiments thereof, which are given by way of example only with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view of the present invention;

[0017] Figure 2 yes Figure 1 C-direction enlarged view;

[0018] Figure 3 yes Figure 1 AA section enlarged view;

[0019] Figure 4 yes Figure 1 BB cross-section enlarged view;

[0020] Figure 5 yes Figure 1 D-direction view;

[0021] Figure 6 yes Figure 1 Enlarged view of part I. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0023] like Figure 1 to Figure 6 As shown, this embodiment includes 4 wire brushes 1, a rotating body 2, a spiral spring coupling 3, a driving motor 4, a first hollow connecting rod 5, a second hollow connecting rod 6, 4 wire brush radial adjustment mechanisms 7, a compressed air delivery mechanism 8 and a vacuum cleaner connecting hose 9. The 4 wire brushes 1 are evenly distributed radially to form a cross intersection. The top of the wire brush head 11 of the wire brush 1 is in an arc shape in the longitudinal direction, which increases the contact area between the top of the wire brush head 11 and the pipe wall and improves the rust removal effect of the pipe wall. The left end of the rotating body 2 is connected to the right end of the driving motor shaft 41 through the spiral spring coupling 3, and the right end of the driving motor 4 is connected to the first hollow connecting rod 5 and the second hollow connecting rod 6 in sequence.

[0024] The wire brush radial adjustment mechanism 7 includes a brush handle 121, a brush handle tube 21 and a tension spring 71 of the wire brush 1. The brush handle 121 extends downward from the center of the brush holder 12 of the wire brush 1. Four brush handle tubes 21 extending vertically outward are evenly distributed in the middle of the rotating body 2. The stepped through hole 210 of the brush handle tube 21 is a square hole 211 near the brush holder 12, and a round hole 212 at the other end. The brush handle tube 21 cooperates with the lower end of the brush handle 121 of the wire brush 1 to form a cylinder. The plunger 122 at the lower end of the brush handle 121 extends into the round hole 212 at the lower end of the brush handle tube 21 and is sealed by an O-ring 213 embedded in the hole wall of the round hole 212. One end of the tension spring 71 is hooked on the hanging ring 123 at one end of the brush handle 121, and the other end is hooked on the middle of the spring support bolt 72. The spring support bolt 72 crosses the root of the brush handle barrel 21 and is fixed on the root of the brush handle barrel 21. The airway of the compressed air delivery mechanism 8 is connected to the stepped through hole 210 of the brush handle barrel 21. The left end of the vacuum cleaner connecting hose 9 is connected to the right end of the second hollow connecting rod 6, and the right end of the vacuum cleaner connecting hose 9 is connected to a mobile vacuum cleaner not shown in the figure.

[0025] The compressed air delivery mechanism 8 includes a rotating body air passage 81, a connecting hose 82, a drive motor shaft 41, a drive motor shaft pipe 83 and a compressed air hose 84. The drive motor shaft 41 is a hollow shaft for the compressed air to pass through. The rotating body air passage 81 includes a rotating body axial blind hole 811 and four transverse holes 812. The rotating body axial blind hole 811 is respectively connected to one end of a corresponding transverse hole 812 uniformly distributed on the same cross section of the rotating body 2. The other end of the transverse hole 812 is respectively connected to the corresponding circular hole 212 in the brush handle tube 21. The rotating body 2 A stepped shaft 22 extends from the right end, and a pipe joint 821 at the left end of the connecting hose 82 is fixed to the right end of the stepped shaft 22 through a threaded connection. The pipe joint 821 at the right end of the connecting hose 82 passes through the spiral spring coupling 3 and is connected to the left end of the driving motor shaft 41; the right end of the driving motor shaft 41 is welded to the left end of the driving motor shaft connecting pipe 83, and the right end of the driving motor shaft connecting pipe 83 is connected to the compressed air hose joint 841 through a rotating sealing support mechanism 85, and the right end of the compressed air hose 84 crosses the second hollow connecting rod 6 and leads to the compressed air tank. In this way, the pneumatic switch 101 and the speed switch 102 on the second hollow connecting rod 6 are pressed, and the compressed air output from the compressed air tank passes through the compressed air hose 84, the drive motor shaft pipe 83, the drive motor shaft 41, the connecting hose 82, the axial blind hole 811 of the rotating body, and the four transverse holes 812 in sequence, and respectively enters the circular hole 212 at the lower end of the brush handle tube 21, and pushes the plunger 122 at the lower end of the corresponding brush handle 121 to move outward after overcoming the tension of the tension spring 71, so that the four wire brush heads 11 are against the inner wall of the pipeline; at the same time, the drive motor shaft 41 rotates at a high speed, and the four wire brush heads 11 rotate at a high speed around the pipeline axis to remove rust from the inner wall of the pipeline. The pneumatic switch 101 and the speed switch 102 can respectively control the flow rate of compressed air and the speed of the drive motor, so as to adjust the pressure of the four wire brush heads 11 against the inner wall of the pipeline and the speed of the four wire brush heads 11 rotating around the pipeline axis to improve the rust removal efficiency of the wire brush 1, and the operation is very flexible and convenient.

[0026] The cross-sectional area of ​​the square hole 211 of the brush handle barrel stepped through hole 210 is larger than the cross-sectional area of ​​the round hole 212 as the inner hole of the cylinder barrel, and the cube 121 of the brush handle 121 close to the brush holder 12 is loosely matched with the square hole 211 to prevent the wire brush head 11 from rotating around the axis of the brush handle 121. The outer circle of the plunger 212 away from the brush holder 12 is loosely matched with the round hole 212.

[0027] The stepped shaft 22 at the right end of the rotating body 2 extends into the flange 31 at the left end of the spiral spring coupling 3, and the left end of the drive motor shaft 41 extends into the flange 31 at the right end of the spiral spring coupling 3, and the two ends of the spiral spring coupling 3 are fixedly connected to the stepped shaft 22 and one end of the drive motor shaft 41 respectively by means of set screws 32 symmetrically and vertically screwed into the flange 31. The spiral spring coupling 3 can prevent the lateral force generated by the vibration of the wire brush head 11 during rust removal from being transmitted to the drive motor shaft 41, ensuring the normal operation of the drive motor 4.

[0028] The rotary seal support mechanism 85 is arranged between the inner hole 51 of the first hollow connecting rod and the right end of the drive motor shaft connecting pipe 83, and includes a seal ring support ring 851, a seal ring 852 and a support rod 853. The seal ring 852 is a rotary Gley seal ring. The seal ring 852 is embedded in the seal ring support ring 851 and contains the right end of the drive motor shaft connecting pipe 83. The two ends of the four evenly distributed support rods 853 are respectively fixedly connected to the outer circle of the seal ring support ring 851 and the inner hole 51 of the first hollow connecting rod. When the drive motor 4 rotates, the drive motor shaft connecting pipe 83 rotates accordingly, and the rotary Gley seal ring seals the adjacent ends of the rotating drive motor shaft connecting pipe 83 and the stationary compressed air hose 84.

[0029] The length of the first hollow connecting rod 5 is smaller than that of the second hollow connecting rod 6. Four elliptical holes 52 are evenly distributed in the circumference of the middle part of the tube wall of the first hollow connecting rod 5 and in the circumference of the tube wall of the second hollow connecting rod 6 near one end of the first hollow connecting rod 5. Dust generated when the four wire brush heads 11 of this embodiment rotate to remove rust is sucked into the first hollow connecting rod 5 and the second hollow connecting rod 6 through the eight elliptical holes 52, and then enters the mobile vacuum cleaner through the vacuum cleaner connecting hose 9, thereby reducing the emission of pollutants in the pipeline rust removal site and benefiting the health of on-site workers.

[0030] The first cover 42 is fixedly covered on the outer peripheral surface of the driving motor 4 by a plurality of fastening screws 43, and the second cover 44 is fixedly covered on the end surface of the driving motor 4 close to the first hollow connecting rod 5. The first cover 42 is longitudinally provided with a convex groove 421 covering the power line of the driving motor to protect the motor wiring from damage. The flange edge 53 at the right end of the first hollow connecting rod 5 is fixedly fixed on the second cover 44 by a plurality of fastening screws 43.

[0031] In addition to the above embodiments, the present invention may also have other implementation modes. Any technical solutions formed by equivalent replacement or equivalent transformation shall fall within the protection scope required by the present invention.

Claims

1. A handheld pipeline inner wall rust removal tool, comprising a plurality of wire brushes, a rotating body, a spiral spring coupling, a driving motor, a first hollow connecting rod and a second hollow connecting rod, wherein the plurality of wire brushes are radially evenly distributed, and the longitudinal top of the wire brush head of the wire brush is in an arc shape, one end of the rotating body is connected to one end of the driving motor shaft through a spiral spring coupling, and the other end of the driving motor is connected to the first hollow connecting rod and the second hollow connecting rod in sequence; characterized in that: The brush holder is provided with a plurality of guide rails, and the guide rails are provided with a plurality of guide rails, each of which is provided with a plurality of guide rails. The guide rails are provided with a plurality of guide rails, each of which is ... The compressed air delivery mechanism includes a rotating body air duct, a connecting hose, a driving motor shaft, a driving motor shaft connecting pipe and a compressed air hose, wherein the driving motor shaft is a hollow shaft, and the rotating body air duct includes a rotating body axial blind hole and several transverse holes, wherein the rotating body axial blind holes are respectively communicated with one end of corresponding transverse holes uniformly distributed on the same cross section of the rotating body, and the other ends of the transverse holes are respectively connected with the corresponding circular holes in the brush handle tube; a stepped shaft extends from one end of the rotating body, a pipe joint at one end of the connecting hose is fixed on one end of the stepped shaft, and a pipe joint at the other end of the connecting hose is connected to one end of the driving motor shaft through a spiral spring coupling; the other end of the driving motor shaft is connected to one end of the driving motor shaft connecting pipe, and the other end of the driving motor shaft connecting pipe crosses out through a rotating sealing support mechanism and is connected to a compressed air hose joint, and the other end of the compressed air hose crosses out a second hollow connecting rod and leads to a compressed air tank. The cross-sectional area of ​​the square hole of the step through hole of the brush handle barrel is larger than the cross-sectional area of ​​the round hole as the inner hole of the cylinder barrel, the cube of the brush handle close to the brush holder is in gap with the square hole, and the outer circle of the plunger of the brush handle away from the brush holder is in gap with the round hole; The stepped shaft at one end of the rotating body extends into the flange at one end of the spiral spring coupling, and one end of the drive motor shaft extends into the flange at the other end of the spiral spring coupling, and the two ends of the spiral spring coupling are fixedly connected to the stepped shaft and one end of the drive motor shaft respectively by means of set screws symmetrically and vertically screwed into the flanges; The rotary seal support mechanism is arranged between the inner hole of the first hollow connecting rod and the other end of the drive motor shaft pipe, and includes a sealing ring support ring, a sealing ring and a plurality of support rods. The sealing ring is embedded in the sealing ring support ring and contains the other end of the drive motor shaft pipe. The two ends of the plurality of evenly distributed support rods are respectively fixedly connected to the outer circle of the sealing ring support ring and the inner hole of the first hollow connecting rod; the sealing ring is a rotary Gray sealing ring; 2. The handheld pipeline inner wall rust removal tool according to claim 1, characterized in that: The length of the first hollow connecting rod is smaller than that of the second hollow connecting rod. A plurality of elliptical holes are evenly distributed in the circumference of the middle part of the tube wall of the first hollow connecting rod and in the circumference of the tube wall of the second hollow connecting rod near one end of the first hollow connecting rod.

3. The handheld pipeline inner wall rust removal tool according to claim 1, characterized in that: The first cover is fixedly covered on the outer peripheral surface of the driving motor, the second cover is fixedly covered on the end surface of the driving motor close to the first hollow connecting rod, the first cover is longitudinally provided with a convex groove covering the power line of the driving motor, and the flange edge at one end of the first hollow connecting rod is fixed on the second cover.

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