An automatic sandblasting device for oil pipe couplings and short sections.

Abstract

This invention relates to an automatic sandblasting device for tubing couplings and short sections, comprising a feeding frame; a sandblasting unit including a driving rotating part, a driven rotating part, a clamping cylinder, and a sandblasting gun; an unloading frame; and a moving unit including a first moving part and a second moving part. Compared with the prior art, this invention makes the spraying of tubing couplings and short sections more automated, saves resources, and improves productivity.

Description

Technical Field

[0001] This invention belongs to the technical field of pretreatment of inner coating for tubing couplings and short sections, and in particular relates to an automatic sandblasting device for tubing couplings and short sections. Background Technology

[0002] Oil pipes are widely used in oil extraction. Coating the inner metal wall of oil pipes with an anti-corrosion inner coating can significantly increase their service life. Furthermore, due to the smooth surface properties of the inner coating, it provides excellent drag reduction during oil extraction, greatly improving extraction efficiency.

[0003] Conventional oil pipes consist of a pipe body and couplings with a total length of approximately 9 meters, while oil pipe sections are composed of a pipe body and couplings with a length of less than 3 meters. When applying an internal coating to oil pipes, the conventional internal coating spraying technique involves applying the coating to the entire pipe body and coupling. This coating technique cannot guarantee complete coverage of the internal coating at the joint between the pipe body and coupling, posing a risk of exposing the metal substrate to corrosive media.

[0004] Therefore, the improved coating technology involves uncoupling and removing the coupling from the tubing, and then applying the internal coating separately. Specifically, the entire inner wall of the tubing is coated, and the first and second threads at the tubing end are also coated. The coupling only requires coating the central area of ​​its inner wall. The coated coupling is then reattached to the coated tubing via the top thread, thus maintaining the integrity of the inner coating on the tubing's inner wall.

[0005] In the existing technology, there is no device that can spray both oil pipe couplings and short sections, and the degree of automation of spraying devices is not high.

[0006] CN212146007U discloses a sandblasting device for processing oil pipe couplings, including a sandblasting box. A horizontal fixed pipe is fixed on the right side wall of the sandblasting box, and a telescopic cylinder is fixed on the left side wall of the sandblasting box. A motor is fixed to the end of the telescopic rod of the telescopic cylinder, and an outer baffle is installed through the output shaft of the motor. The left side of the oil pipe coupling is sleeved on the protruding post, and the oil pipe coupling is located inside the fixed pipe. A fixed rod is fixed inside the fixed pipe, and a conical stop is rotatably connected to the left end of the fixed rod. The right end of the oil pipe coupling is tightly abutted against the conical stop. Sandblasting nozzles are evenly distributed around the circumference of the fixed pipe, and the sand outlet of the sandblasting nozzle corresponds to the annular space between the oil pipe coupling and the fixed pipe. However, this application can only sandblast oil pipe couplings and short sections one by one, resulting in low processing efficiency and failing to meet the needs of automation. Summary of the Invention

[0007] The purpose of this invention is to overcome the defects of the prior art by providing an automatic sandblasting device for oil pipe couplings and short sections.

[0008] The objective of this invention can be achieved through the following technical solutions:

[0009] An automatic sandblasting device for oil pipe couplings and short sections includes:

[0010] A loading frame for placing the oil pipe couplings or the short sections;

[0011] A sandblasting unit located next to and perpendicular to the loading frame includes an active rotating part that drives the oil pipe coupling or the short section to rotate, a driven rotating part that is arranged opposite to the active rotating part, and a sandblasting gun that passes through the active rotating part and sprays sand into the interior of the oil pipe coupling or the short section.

[0012] A feeding frame is provided in the sandblasting unit and is used to place the oil pipe couplings or short sections after sandblasting.

[0013] The moving unit located below the loading frame, the sandblasting unit, and the unloading frame includes a first moving part for moving the oil pipe coupling or the short section from the loading frame to the sandblasting unit, and a second moving part located next to the first moving part for conveying the sandblasted oil pipe coupling or short section from the sandblasting unit to the unloading frame.

[0014] Furthermore, the sandblasting unit also includes:

[0015] A clamping cylinder located between the active rotating part and the driven rotating part, used to clamp the oil pipe coupling or short section after sandblasting.

[0016] A third moving part that drives the sandblasting gun to move along a direction perpendicular to the feeding frame;

[0017] A rubber hose with one end connected to the sandblasting gun and the other end connected to an external sandblasting storage tank;

[0018] And an adjustment unit for adjusting the vertical height of the active rotating part, the driven rotating part, the third moving part, the sandblasting gun, and the fourth moving part.

[0019] Furthermore, the adjustment unit includes:

[0020] The first column has several screw holes at different vertical heights;

[0021] The second column, which is arranged opposite to the first column, has several screw holes arranged in the same manner as the first column in the direction facing the first column.

[0022] The first movable plate is bolted between the first column and the second column;

[0023] The third column, arranged parallel to the first column, has several screw holes at different vertical heights;

[0024] A fourth column, arranged opposite to the third column, has several screw holes arranged in the same manner as the third column in the direction facing the third column.

[0025] The second movable plate is bolted between the third and fourth columns;

[0026] A plurality of first support rods pass through the first movable plate and the second movable plate, and the clamping cylinder is mounted on the first support rods;

[0027] A first support box is installed at the end of the first support rod away from the first moving plate. The active rotating part is installed on the first support box and one end of it protrudes through the first support box. The sandblasting gun passes through the first moving plate, the second moving plate, and the protrusion of the active rotating part.

[0028] The fifth column, arranged parallel to the third column, has several screw holes at different vertical heights;

[0029] A sixth column, arranged opposite to the fifth column, has several screw holes arranged in the same manner as the fifth column in the direction facing the fifth column;

[0030] The third movable plate is bolted between the fifth and sixth columns;

[0031] Several second support rods passing through the third movable plate;

[0032] A second support box is installed at the end of the second support rod away from the third moving plate. The driven rotating part is installed on the second support box. The second support box is hollow inside and has an opening at the bottom, which is connected to an external sandblasting recovery box.

[0033] Furthermore, the active rotating part includes a first cylinder mounted on the first support box, a second cylinder rotatably arranged on the first cylinder, a sprocket passing through the first cylinder and driving the second cylinder to rotate, a reduction motor mounted on the outer surface of the first support box and driving the sprocket to rotate, and a first thrust cylinder mounted on the outer surface of the second moving plate and controlling the first support box to move in a direction parallel to the feeding frame. The front end of the second cylinder has a protrusion that extends into the interior of the oil pipe coupling or the short section and abuts against the inner wall of the oil pipe coupling or the short section. The sandblasting gun passes through the sprocket, the first cylinder, the second cylinder, and the protrusion of the second cylinder. The sprocket is arranged inside the first support box and is on the same plane as the reduction motor.

[0034] Furthermore, the driven rotating part includes a second thrust cylinder mounted on the third movable plate and connected to the second support box, a third cylinder mounted on the outer surface of the second support box, and a fourth cylinder rotatably arranged on the third cylinder. The front end of the fourth cylinder has a protrusion that extends into the interior of the oil pipe coupling or the short section and abuts against the inner wall of the oil pipe coupling or the short section. The protrusion communicates with the interior of the second support box. The fourth cylinder is driven to rotate by the second cylinder, and the fourth cylinder receives sandblasting from the sandblasting gun.

[0035] Furthermore, the third moving part includes:

[0036] A fourth movable plate is slidably mounted on the first support rod, and one end of the sandblasting gun is fixed on the fourth movable plate;

[0037] And an electric cylinder installed on the first support box, one end of which is connected to the fourth movable plate.

[0038] Furthermore, the moving unit also includes:

[0039] A rectangular frame whose length is at least greater than the distance between the loading frame and the unloading frame;

[0040] And two translation cylinders located at both ends of the rectangular frame, which are respectively connected to the first moving part and the second moving part.

[0041] Furthermore, the first moving part includes a first moving body connected to the translation cylinder, a first lifting platform disposed on the top of the first moving body, a first V-shaped frame disposed above the first lifting platform, a first lifting cylinder disposed inside the first moving body and connected to the first lifting platform, and a plurality of casters disposed at the bottom of the first moving body.

[0042] The second moving part includes a second moving body connected to the translation cylinder, a second lifting platform disposed on the top of the second moving body, a second V-shaped frame disposed above the second lifting platform, a second lifting cylinder disposed inside the second moving body and connected to the second lifting platform, and a plurality of casters disposed at the bottom of the second moving body.

[0043] Furthermore, the feeding frame includes several first support frames and a first feeding box mounted on the first support frames and having an opening at its top. The first feeding box is approximately Z-shaped and its inclination angle satisfies the requirement that the oil pipe coupling or the short section slides from one end of the first feeding box to the other end.

[0044] Furthermore, the unloading frame includes several second support frames and a second unloading box mounted on the second support frames and having an opening at its top. The second unloading box is generally Z-shaped and its inclination angle satisfies the requirement that the oil pipe coupling or the short section slides from one end of the second unloading box to the other end.

[0045] Compared with the prior art, the present invention has the following beneficial effects:

[0046] (1) The present invention is fully automated. The operator only needs to place the oil pipe coupling or short section to be sprayed on the loading mechanism by means of a robotic arm or manually. Since the loading mechanism has a slope, the oil pipe coupling or short section will automatically move to the other end of the loading mechanism and be automatically moved to the sandblasting unit by the moving unit for sandblasting. Then, it will be automatically moved to the unloading mechanism for unloading. The entire process is automated, which improves the spraying efficiency.

[0047] (2) The multiple columns of the present invention can be adjusted by bolt connection, which makes it more convenient for the first or second moving part of the moving unit to be aligned with the clamping cylinder.

[0048] (3) The present invention provides uniform sandblasting. The rotation function of the active rotating part causes the oil pipe coupling or short section to rotate during spraying. The clamping cylinder clamps the active rotating part and the driven rotating part, making the spraying more stable and improving the yield.

[0049] (4) The present invention provides a second support box for collecting sandblasting that has not been sprayed into the oil pipe coupling or short section, and its bottom has an opening to connect with the external sandblasting recovery box. The sandblasting can be reused, saving resources and making the environment cleaner, i.e., the sandblasting will not escape.

[0050] (5) The moving unit of the present invention is ingeniously designed. By using a translation cylinder to connect with the first moving part or the second moving part, the moving range of the first moving part and the second moving part is more accurate when moving. Attached Figure Description

[0051] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0052] Figure 2 This is the front view of the present invention.

[0053] Figure 3 This is the left view of the present invention.

[0054] Figure 4 This is a top view of the present invention.

[0055] Figure 5 This is a partial schematic diagram of the active rotating part of the present invention.

[0056] Figure 6 This is a partial schematic diagram of the driven rotating part of the present invention.

[0057] Numbering on the map:

[0058] 1-Feeding frame, 101-First support frame, 102-First discharge box, 2-Sandblasting unit, 201-Active rotating part, 202-Driven rotating part, 203-Third moving part, 204-Sandblasting gun, 205-Rubber hose, 206-Adjusting part, 207-Fourth moving plate, 208-First column, 209-Second column, 210-First moving plate, 211-Third column, 212-Fourth column, 213-Second moving plate, 214-First support rod, 215-First support box, 216-Fifth column, 217-Sixth column, 218-Third moving plate, 219-Second support rod, 220-Second support box, 22 1- Gear motor, 222- First cylinder, 223- Second thrust cylinder, 224- Third cylinder, 225- Electric cylinder, 226- First thrust cylinder, 227- Clamping cylinder, 228- Second cylinder, 229- Sprocket, 230- Fourth cylinder, 3- Unloading frame, 301- Second support frame, 302- Second unloading box, 4- Moving unit, 401- First moving part, 402- Second moving part, 403- Rectangular frame, 404- Translation cylinder, 405- First moving body, 406- First lifting platform, 407- First lifting cylinder, 408- Second moving body, 409- Second lifting platform, 410- Second lifting cylinder. Detailed Implementation

[0059] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. These embodiments are based on the technical solution of the present invention and provide detailed implementation methods and specific operating procedures. However, the scope of protection of the present invention is not limited to the following embodiments.

[0060] Unless otherwise specified in this technical solution, the component model, material name, connection structure, control method, and other features are considered to be common technical features disclosed in the prior art.

[0061] In the description of this invention, it should be understood that the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and 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. Therefore, they should not be construed as limitations on this invention.

[0062] In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integrated connection; they can refer to a bolted connection or a welded connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0063] To automate the spraying of tubing couplings and short sections, conserve resources, and improve productivity, this invention provides an automatic sandblasting device for tubing couplings and short sections. The structure of this device can be found in [link to device description]. Figures 1 to 6 As shown, it includes:

[0064] The loading frame 1 is used to place the oil pipe coupling or the short section;

[0065] A sandblasting unit 2 is arranged next to and perpendicular to the loading frame 1. It includes an active rotating part 201 that drives the oil pipe coupling or the short section to rotate, a driven rotating part 202 that is arranged opposite to the active rotating part 201, and a sandblasting gun 204 that passes through the active rotating part 201 and sprays sand into the interior of the oil pipe coupling or the short section.

[0066] A feeding frame 3 is provided in the sandblasting unit 2 and is used to place the oil pipe couplings or short sections after sandblasting;

[0067] And a moving unit 4 located below the loading frame 1, the sandblasting unit 2 and the unloading frame 3, comprising a first moving part 401 for moving the oil pipe coupling or the short section from the loading frame 1 to the sandblasting unit 2, and a second moving part 402 located beside the first moving part 401 for conveying the sandblasted oil pipe coupling or short section from the sandblasting unit 2 to the unloading frame 3.

[0068] For some specific implementation methods, please refer to [link / reference]. Figure 1 As shown, the sandblasting unit 2 further includes:

[0069] A clamping cylinder 227 is provided between the active rotating part 201 and the driven rotating part 202 and is used to clamp the oil pipe coupling or short section after sandblasting.

[0070] A third moving part 203 that drives the sandblasting gun 204 to move in a direction perpendicular to the feeding frame 1;

[0071] A rubber hose 205, one end of which is connected to the sandblasting gun 204 and the other end of which is connected to an external sandblasting storage tank;

[0072] And an adjustment unit 206 for adjusting the vertical height of the active rotating part 201, the driven rotating part 202, the third moving part 203, the sandblasting gun 202, and the fourth moving part 204.

[0073] For more detailed implementation methods, please refer to [link / reference]. Figure 1 As shown, the adjustment unit 206 includes:

[0074] The first column 208 has several screw holes at different vertical heights;

[0075] The second column 209, which is arranged opposite to the first column 208, has several screw holes arranged in the same manner as the first column 207 in the direction facing the first column 208.

[0076] The first movable plate 210 is bolted between the first column 208 and the second column 209;

[0077] The third column 211, which is arranged parallel to the first column 208, has several screw holes at different vertical heights.

[0078] A fourth column 212, arranged opposite to the third column 211, has a plurality of screw holes arranged in the same manner as the third column 211 in the direction toward the third column 211.

[0079] The second movable plate 213 is bolted between the third column 211 and the fourth column 212;

[0080] A plurality of first support rods 214 pass through the first movable plate 210 and the second movable plate 213, and the clamping cylinder 227 is mounted on the first support rods 214.

[0081] A first support box 215 is installed at the end of the first support rod 214 away from the first moving plate 210. The active rotating part 201 is installed on the first support box 215 and one end of it protrudes through the first support box 215. The sandblasting gun 202 passes through the first moving plate 210, the second moving plate 213, and the protrusion of the active rotating part 201.

[0082] The fifth column 216, which is arranged parallel to the third column 211, has several screw holes with different vertical heights.

[0083] The sixth column 217, which is arranged opposite to the fifth column 216, has a plurality of screw holes arranged in the same manner as the fifth column 216 in the direction facing the fifth column 216.

[0084] The third movable plate 218 is bolted between the fifth column 216 and the sixth column 217;

[0085] A plurality of second support rods 219 passing through the third movable plate 218;

[0086] And a second support box 220 installed at the end of the second support rod 219 away from the third moving plate 218, the driven rotating part 202 is installed on the second support box 220, the second support box 220 is hollow inside and has an opening at the bottom, the opening is connected to an external sandblasting recovery box.

[0087] For more detailed implementation methods, please refer to [link / reference]. Figure 1 , Figure 3 and Figure 5 As shown, the active rotating part 201 includes a first cylinder 222 mounted on the first support box 215, a second cylinder 228 rotatably arranged on the first cylinder 222, a sprocket 229 passing through the first cylinder 222 and driving the second cylinder 228 to rotate, a reduction motor 221 mounted on the outer surface of the first support box 215 and driving the sprocket 229 to rotate, and a first thrust cylinder 226 mounted on the outer surface of the second moving plate 213 and controlling the first support box 215 to move in a direction parallel to the loading frame 1. The front end of the second cylinder 228 has a protrusion that extends into the interior of the oil pipe coupling or the short section and abuts against the inner wall of the oil pipe coupling or the short section. The sandblasting gun 202 passes through the sprocket 229, the first cylinder 222, the second cylinder 228, and the protrusion of the second cylinder 228. The sprocket 229 is arranged inside the first support box 215 and is on the same plane as the reduction motor 221.

[0088] In this embodiment, the geared motor 221 drives the first cylinder 222 to rotate, and the first thrust cylinder 226 drives the first support box 215 to move horizontally along the first support rod 214, so that the protruding part of the second cylinder 228 extends into the interior of the oil pipe coupling or the short section.

[0089] For more detailed implementation methods, please refer to [link / reference]. Figure 1 , Figure 3 and Figure 6 As shown, the driven rotating part 202 includes a second thrust cylinder 223 mounted on the third moving plate 218 and connected to the second support box 220, a third cylinder 224 mounted on the outer surface of the second support box 220, and a fourth cylinder 230 rotatably arranged on the third cylinder 224. The front end of the fourth cylinder 230 has a protrusion that extends into the interior of the oil pipe coupling or the short section and abuts against the inner wall of the oil pipe coupling or the short section. The protrusion communicates with the interior of the second support box 220. The fourth cylinder 230 is driven to rotate by the second cylinder 228, and the fourth cylinder 230 receives sandblasting from the sandblasting gun 202.

[0090] In this embodiment, the second thrust cylinder 223 drives the second support box 220 to move horizontally along the second support rod 219, so that the protrusion of the fourth cylinder 230 is in close contact with the oil pipe coupling or the short section and is rotated by the second cylinder 228.

[0091] For more detailed implementation methods, please refer to [link / reference]. Figure 1 and Figure 3 As shown, the third moving part 203 includes:

[0092] A fourth movable plate 207 is slidably mounted on the first support rod 214, and one end of the sandblasting gun 204 is fixed on the fourth movable plate 207;

[0093] And an electric cylinder 225 installed on the first support box 215, one end of which is connected to the fourth moving plate 207.

[0094] In this embodiment, the electric cylinder 225 is fixed on the first support box 215, and the extension rod of the electric cylinder 225 is connected to the fourth moving plate 207. The fourth moving plate 207 is driven by the electric cylinder 225 to slide on the first support rod 214. Since the spray gun 204 is fixedly connected to the fourth moving plate 207, the spray gun 204 is driven by the fourth moving plate 204 to approach the inside of the oil pipe coupling or the short section for spraying.

[0095] For some specific implementation methods, please refer to [link / reference]. Figure 1 As shown, the moving unit 4 further includes:

[0096] A rectangular frame 403 with a length at least greater than the distance between the loading frame 1 and the unloading frame 3;

[0097] And two translation cylinders 404 located at both ends of the rectangular frame 403, which are respectively connected to the first moving part 401 and the second moving part 402.

[0098] In this embodiment, a first moving part 401 and a second moving part 402 are provided inside the rectangular frame 403. The extension rod of the translation cylinder 404 is fixed to the first moving part 401 and the second moving part 402 respectively. The first moving part 401 and the second moving part 402 are moved by the back-and-forth movement of the extension rod of the translation cylinder 404 in the horizontal direction.

[0099] For more detailed implementation methods, please refer to [link / reference]. Figure 1 and Figure 2As shown, the first moving part 401 includes a first moving body 405 connected to the translation cylinder 404, a first lifting platform 406 disposed on the top of the first moving body 405, a first V-shaped frame disposed above the first lifting platform 406, a first lifting cylinder 407 disposed inside the first moving body 405 and connected to the first lifting platform 406, and a plurality of casters disposed at the bottom of the first moving body 405.

[0100] The second moving part 402 includes a second moving body 408 connected to the translation cylinder 404, a second lifting platform 409 disposed on the top of the second moving body 408, a second V-shaped frame disposed above the second lifting platform 409, a second lifting cylinder 410 disposed inside the second moving body 408 and connected to the second lifting platform 409, and a plurality of casters disposed at the bottom of the second moving body 408.

[0101] In this embodiment, the first V-shaped frame and the second V-shaped frame are used to place the oil pipe coupling or the short section. The first lifting platform 406 is fixedly connected to the extension rod of the first lifting cylinder 407. The reciprocating extension and retraction of the extension rod of the first lifting cylinder 407 in the vertical direction causes the first lifting platform 406 to rise or fall in the vertical direction, thereby connecting the first lifting platform 406 to the loading frame 1. The second lifting platform 409 is fixedly connected to the extension rod of the second lifting cylinder 410. The reciprocating extension and retraction of the extension rod of the second lifting cylinder 410 in the vertical direction causes the second lifting platform 409 to rise or fall in the vertical direction, thereby connecting the second lifting platform 409 to the unloading frame 3.

[0102] For some specific implementation methods, please refer to [link / reference]. Figure 1 and Figure 2 As shown, the feeding frame 1 includes several first support frames 101 and a first feeding box 102 mounted on the first support frames 101 and having an opening at its top. The first feeding box 102 is generally Z-shaped and its inclination angle satisfies the requirement that the oil pipe coupling or the short section slides from one end of the first feeding box 102 to the other end.

[0103] For some specific implementation methods, please refer to [link / reference]. Figure 1 and Figure 2 As shown, the unloading frame 3 includes several second support frames 301 and a second unloading box 302 mounted on the second support frames 301 and having an opening at its top. The second unloading box 302 is generally Z-shaped and its inclination angle satisfies the requirement that the oil pipe coupling or the short section slides from one end of the second unloading box 302 to the other end.

[0104] Each of the above implementation methods can be implemented individually, or in any combination of two or more.

[0105] The above implementation methods will be described in more detail below with reference to specific embodiments.

[0106] Example 1

[0107] To automate the spraying of tubing couplings and short sections, save resources, and improve productivity, this embodiment provides an automatic sandblasting device for tubing couplings and short sections.

[0108] See Figures 1 to 6 As shown, the device includes a loading frame 1 for placing oil pipe couplings or short sections, a sandblasting unit 2 arranged next to the loading frame 1 and perpendicular to the loading frame 1, a unloading frame 3 arranged in the sandblasting unit 2 for placing the sandblasted oil pipe couplings or short sections, and a moving unit 4 located below the loading frame 1, the sandblasting unit 2 and the unloading frame 3.

[0109] Specifically, the following description is given for sandblasting unit 2:

[0110] The sandblasting unit 2 includes an active rotating part 201 that drives the oil pipe coupling or short section to rotate, a driven rotating part 202 arranged opposite to the active rotating part 201, a sandblasting gun 204 that passes through the active rotating part 201 and sprays sand into the oil pipe coupling or short section, a clamping cylinder 227 disposed between the active rotating part 201 and the driven rotating part 202 for clamping the sandblasted oil pipe coupling or short section, and a first moving part 401 that moves the oil pipe coupling or short section from the loading frame 1 to the sandblasting unit 2. The equipment includes a second moving part 402 for conveying the sandblasted oil pipe coupling or short section from the sandblasting unit 2 to the unloading frame 3, a third moving part 203 for moving the sandblasting gun 204 in a direction perpendicular to the loading frame 1, a rubber hose 205 with one end connected to the sandblasting gun 204 and the other end connected to an external sandblasting storage tank, and an adjusting part 206 for adjusting the vertical height of the active rotating part 201, the driven rotating part 202, the third moving part 203, the sandblasting gun 202, and the fourth moving part 204.

[0111] Specifically, the adjustment section 206 is explained as follows:

[0112] Adjustment unit 206 includes a first column 208 having a plurality of screw holes at different vertical heights; a second column 209 arranged opposite to the first column 208 and having a plurality of screw holes arranged in the same manner as the first column 207 in the direction toward the first column 208; a first movable plate 210 bolted between the first column 208 and the second column 209; a third column 211 arranged parallel to the first column 208 and having a plurality of screw holes at different vertical heights; a fourth column 212 arranged opposite to the third column 211 and having a plurality of screw holes arranged in the same manner as the third column 211 in the direction toward the third column 211; a second movable plate 213 bolted between the third column 211 and the fourth column 212; and a plate passing through the first column 207. A plurality of first support rods 214 of a movable plate 210 and a second movable plate 213, a first support box 215 installed at the end of the first support rods 214 away from the first movable plate 210, a fifth column 216 arranged parallel to the third column 211 and having a plurality of screw holes at different vertical heights, a sixth column 217 arranged opposite to the fifth column 216 and having a plurality of screw holes arranged in the same manner as the fifth column 216 in the direction toward the fifth column 216, a third movable plate 218 bolted between the fifth column 216 and the sixth column 217, a plurality of second support rods 219 passing through the third movable plate 218, and a second support box 220 installed at the end of the second support rods 219 away from the third movable plate 218.

[0113] The clamping cylinder 227 is mounted on the first support rod 214; the active rotating part 201 is mounted on the first support box 215 and one end of it protrudes through the first support box 215; the sandblasting gun 202 passes through the first moving plate 210, the second moving plate 213, and the protrusion of the active rotating part 201; the driven rotating part 202 is mounted on the second support box 220; the second support box 220 is hollow inside and has an opening at the bottom, which is connected to the external sandblasting recovery box.

[0114] Specifically, the following description is given for the moving unit 4:

[0115] The moving unit 4 includes a first moving part 401 for moving the oil pipe coupling or short section from the loading frame 1 to the sandblasting unit 2, and a second moving part 402 located next to the first moving part 401 for conveying the sandblasted oil pipe coupling or short section from the sandblasting unit 2 to the unloading frame 3.

[0116] The working principle of this embodiment is as follows:

[0117] The operator places the hose coupling or short section onto the loading frame 1. The hose coupling or short section moves to the lowest point of the loading frame 1. At this time, the first moving part 401 moves the hose coupling or short section to below the sandblasting unit 2. The clamping cylinder 227 clamps the hose coupling or short section. The active rotating part 201 clamps the hose coupling or short section and its protrusion extends into the hose coupling or short section. The driven rotating part 202 clamps the hose coupling or short section. The clamping cylinder 227 clamps the hose coupling or short section and retracts. The first moving part 401 retracts to the side of the loading frame 1.

[0118] The third moving part 203 drives the sandblasting gun 204 to approach the oil pipe coupling or short section, so that one end of the sandblasting gun 204 passes through the protrusion of the active rotating part 201. Then the sandblasting gun 204 performs sandblasting. The active rotating part 201 rotates when the sandblasting gun 204 performs sandblasting to make the sandblasting uniform. The driven rotating part 202 is driven to rotate by the active rotating part 201.

[0119] After sandblasting, the second moving part 402 moves to below the oil pipe coupling or short section, the active rotating part 201 and the driven rotating part 202 retract, the clamping cylinder 227 clamps the oil pipe coupling or short section, the second moving part 402 receives the oil pipe coupling or short section, the clamping cylinder 227 retracts, and the second moving part 402 moves the sprayed oil pipe coupling or short section to the unloading mechanism 3.

[0120] Example 2

[0121] See Figures 1 to 6 Compared with Embodiment 1, it is mostly the same, except that the active rotating part 201 includes a first cylinder 222 mounted on the first support box 215, a second cylinder 228 rotatably arranged on the first cylinder 222, a sprocket 229 passing through the first cylinder 222 and driving the second cylinder 228 to rotate, a reduction motor 221 mounted on the outer surface of the first support box 215 and driving the sprocket 229 to rotate, and a first thrust cylinder 226 mounted on the outer surface of the second moving plate 213 and controlling the first support box 215 to move in a direction parallel to the loading frame 1. The front end of the second cylinder (228) has a protrusion that extends into the interior of the oil pipe coupling or short section and abuts against the inner wall of the oil pipe coupling or short section. The sandblasting gun 202 passes through the sprocket 229, the first cylinder 222, the second cylinder 228, and the protrusion of the second cylinder 228. The sprocket 229 is arranged inside the first support box 215 and is on the same plane as the reduction motor 221.

[0122] The driven rotating part 202 includes a second thrust cylinder 223 mounted on the third moving plate 218 and connected to the second support box 220, a third cylinder 224 mounted on the outer surface of the second support box 220, and a fourth cylinder 230 rotatably arranged on the third cylinder 224. The front end of the fourth cylinder 230 has a protrusion that extends into the interior of the oil pipe coupling or short section and abuts against the inner wall of the oil pipe coupling or short section. The protrusion communicates with the interior of the second support box 220. The fourth cylinder 230 is driven to rotate by the second cylinder 228, and the fourth cylinder 230 receives sandblasting from the sandblasting gun 202.

[0123] The working principle of this embodiment is as follows:

[0124] In this embodiment, the geared motor 221 drives the first cylinder 222 to rotate, and the first thrust cylinder 226 drives the first support box 215 to move horizontally along the first support rod 214, so that the protruding part of the second cylinder 228 extends into the interior of the oil pipe coupling or short section.

[0125] In this embodiment, the second thrust cylinder 223 drives the second support box 220 to move horizontally along the second support rod 219, so that the protrusion of the fourth cylinder 230 is in close contact with the oil pipe coupling or short section and is rotated by the second cylinder 228.

[0126] Example 3

[0127] See Figures 1 to 6 It is almost identical to Embodiment 2, except that the third moving part 203 includes:

[0128] A fourth movable plate 207 is slidably mounted on the first support rod 214, and one end of the sandblasting gun 204 is fixed on the fourth movable plate 207;

[0129] And an electric cylinder 225 installed on the first support box 215, one end of which is connected to the fourth moving plate 207.

[0130] The working principle of this embodiment is as follows:

[0131] In this embodiment, the electric cylinder 225 is fixed on the first support box 215. The extension rod of the electric cylinder 225 is connected to the fourth moving plate 207. The fourth moving plate 207 is driven by the electric cylinder 225 to slide on the first support rod 214. Since the spray gun 204 is fixedly connected to the fourth moving plate 207, the spray gun 204 is driven by the fourth moving plate 204 to approach the inside of the oil pipe coupling or short section for spraying.

[0132] Example 4

[0133] See Figures 1 to 6 It is largely the same as Embodiment 1, except that the moving unit 4 also includes:

[0134] A rectangular frame 403 with a length at least greater than the distance between the loading frame 1 and the unloading frame 3;

[0135] And two translation cylinders 404 located at both ends of the rectangular frame 403, which are respectively connected to the first moving part 401 and the second moving part 402.

[0136] The first moving part 401 includes a first moving body 405 connected to a translation cylinder 404, a first lifting platform 406 disposed on the top of the first moving body 405, a first V-shaped frame disposed above the first lifting platform 406, a first lifting cylinder 407 disposed inside the first moving body 405 and connected to the first lifting platform 406, and a plurality of casters disposed at the bottom of the first moving body 405.

[0137] The second moving part 402 includes a second moving body 408 connected to a translation cylinder 404, a second lifting platform 409 disposed on the top of the second moving body 408, a second V-shaped frame disposed above the second lifting platform 409, a second lifting cylinder 410 disposed inside the second moving body 408 and connected to the second lifting platform 409, and a plurality of casters disposed at the bottom of the second moving body 408.

[0138] The working principle of this embodiment is as follows:

[0139] In this embodiment, a first moving part 401 and a second moving part 402 are provided inside the rectangular frame 403. The extension rod of the translation cylinder 404 is fixed to the first moving part 401 and the second moving part 402 respectively. The first moving part 401 and the second moving part 402 are moved by the back-and-forth movement of the extension rod of the translation cylinder 404 in the horizontal direction.

[0140] In this embodiment, the first V-shaped frame and the second V-shaped frame are used to place oil pipe couplings or short sections. The first lifting platform 406 is fixedly connected to the extension rod of the first lifting cylinder 407. The reciprocating extension and retraction of the extension rod of the first lifting cylinder 407 in the vertical direction causes the first lifting platform 406 to rise or fall in the vertical direction, thereby connecting the first lifting platform 406 to the loading frame 1. The second lifting platform 409 is fixedly connected to the extension rod of the second lifting cylinder 410. The reciprocating extension and retraction of the extension rod of the second lifting cylinder 410 in the vertical direction causes the second lifting platform 409 to rise or fall in the vertical direction, thereby connecting the second lifting platform 409 to the unloading frame 3.

[0141] Example 5

[0142] See Figures 1 to 6Compared with Embodiment 1, it is mostly the same, except that the feeding frame 1 includes several first support frames 101 and a first feeding box 102 installed on the first support frames 101 and having an opening at its top. The first feeding box 102 is roughly Z-shaped and its tilt angle satisfies that the oil pipe coupling or short section can slide from one end of the first feeding box 102 to the other end.

[0143] The unloading frame 3 includes several second support frames 301 and a second unloading box 302 mounted on the second support frames 301 and having an opening at its top. The second unloading box 302 is generally Z-shaped and its tilt angle is such that the oil pipe coupling or short section can slide from one end of the second unloading box 302 to the other end.

[0144] The above description of the embodiments is provided to enable those skilled in the art to understand and use the invention. It will be apparent to those skilled in the art that various modifications can be made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the invention should be within the protection scope of the present invention.

Claims

1. An automatic sandblasting device for oil pipe couplings and short sections, characterized in that, include: A loading frame (1) for placing the oil pipe coupling or the short section; A sandblasting unit (2) is arranged next to the loading frame (1) and perpendicular to the loading frame (1). It includes an active rotating part (201) that drives the oil pipe coupling or the short section to rotate, a driven rotating part (202) that is arranged opposite to the active rotating part (201), and a sandblasting gun (204) that passes through the active rotating part (201) and sprays sand into the interior of the oil pipe coupling or the short section. A feeding frame (3) is provided in the sandblasting unit (2) and is used to place the oil pipe couplings or short sections after sandblasting. And a moving unit (4) located below the loading frame (1), the sandblasting unit (2) and the unloading frame (3), comprising a first moving part (401) for moving the oil pipe coupling or the short section from the loading frame (1) to the sandblasting unit (2), and a second moving part (402) located next to the first moving part (401) for conveying the sandblasted oil pipe coupling or short section from the sandblasting unit (2) to the unloading frame (3). The sandblasting unit (2) also includes: A clamping cylinder (227) is provided between the active rotating part (201) and the driven rotating part (202) and is used to clamp the oil pipe coupling or short section after sandblasting. A third moving part (203) that drives the sandblasting gun (204) to move in a direction perpendicular to the loading frame (1). A rubber hose (205) with one end connected to the sandblasting gun (204) and the other end connected to an external sandblasting storage tank. And an adjustment unit (206) for adjusting the vertical height of the active rotating part (201), the driven rotating part (202), the third moving part (203), the sandblasting gun (204), and the fourth moving part. The adjustment unit (206) includes: The first column (208) has several screw holes at different vertical heights; A second column (209) arranged opposite to the first column (208) has a plurality of screw holes arranged in the same manner as the first column (208) in the direction facing the first column (208); The first movable plate (210) is bolted between the first column (208) and the second column (209); The third column (211) is arranged parallel to the first column (208) and has several screw holes with different vertical heights; A fourth column (212) arranged opposite to the third column (211) has a plurality of screw holes arranged in the same manner as the third column (211) in the direction toward the third column (211); The second movable plate (213) is bolted between the third column (211) and the fourth column (212); The clamping cylinder (227) is mounted on the first support rods (214) passing through the first moving plate (210) and the second moving plate (213); A first support box (215) is installed at the end of the first support rod (214) away from the first moving plate (210). The active rotating part (201) is installed on the first support box (215) and one end of it protrudes through the first support box (215). The sandblasting gun (204) passes through the first moving plate (210), the second moving plate (213), and the protrusion of the active rotating part (201). The fifth column (216), which is arranged parallel to the third column (211), has several screw holes with different vertical heights; A sixth column (217) arranged opposite to the fifth column (216) has a plurality of screw holes arranged in the same manner as the fifth column (216) in the direction toward the fifth column (216); The third movable plate (218) is bolted between the fifth column (216) and the sixth column (217); A plurality of second support rods (219) passing through the third movable plate (218); And a second support box (220) installed at the end of the second support rod (219) away from the third moving plate (218), the driven rotating part (202) is installed on the second support box (220), the second support box (220) is hollow inside and has an opening at the bottom, the opening is connected to an external sandblasting recovery box.

2. The automatic sandblasting device for oil pipe couplings and short sections according to claim 1, characterized in that, The active rotating unit (201) includes a first cylinder (222) mounted on the first support box (215), a second cylinder (228) rotatably arranged on the first cylinder (222), a sprocket (229) passing through the first cylinder (222) and driving the second cylinder (228) to rotate, a geared motor (221) mounted on the outer surface of the first support box (215) and driving the sprocket (229) to rotate, and a second moving plate (213) mounted on the outer surface and controlling the first support box (215). The first thrust cylinder (226) moves in a direction parallel to the feeding frame (1). The front end of the second cylinder (228) has a protrusion that extends into the interior of the oil pipe coupling or the short section and abuts against the inner wall of the oil pipe coupling or the short section. The sandblasting gun (204) passes through the sprocket (229), the first cylinder (222), the second cylinder (228), and the protrusion of the second cylinder (228). The sprocket (229) is arranged inside the first support box (215) and is on the same plane as the geared motor (221).

3. The automatic sandblasting device for oil pipe couplings and short sections according to claim 2, characterized in that, The driven rotating part (202) includes a second thrust cylinder (223) mounted on the third moving plate (218) and connected to the second support box (220), a third cylinder (224) mounted on the outer surface of the second support box (220), and a fourth cylinder (230) rotatably arranged on the third cylinder (224). The front end of the fourth cylinder (230) has a protrusion that extends into the interior of the oil pipe coupling or the short section and abuts against the inner wall of the oil pipe coupling or the short section. The protrusion communicates with the interior of the second support box (220). The fourth cylinder (230) is driven to rotate by the second cylinder (228), and the fourth cylinder (230) receives sandblasting from the sandblasting gun (204).

4. An automatic sandblasting device for oil pipe couplings and short sections according to claim 2, characterized in that, The third moving part (203) includes: A fourth movable plate (207) is slidably mounted on the first support rod (214), and one end of the sandblasting gun (204) is fixed to the fourth movable plate (207); And an electric cylinder (225) installed on the first support box (215), one end of which is connected to the fourth moving plate (207).

5. An automatic sandblasting device for oil pipe couplings and short sections according to claim 1, characterized in that, The moving unit (4) further includes: A rectangular frame (403) with a length at least greater than the distance between the loading frame (1) and the unloading frame (3). And two translation cylinders (404) located at both ends of the rectangular frame (403), which are respectively connected to the first moving part (401) and the second moving part (402).

6. An automatic sandblasting device for oil pipe couplings and short sections according to claim 5, characterized in that, The first moving part (401) includes a first moving body (405) connected to the translation cylinder (404), a first lifting platform (406) disposed on the top of the first moving body (405), a first V-shaped frame disposed above the first lifting platform (406), a first lifting cylinder (407) disposed inside the first moving body (405) and connected to the first lifting platform (406), and a plurality of casters disposed at the bottom of the first moving body (405); The second moving part (402) includes a second moving body (408) connected to the translation cylinder (404), a second lifting platform (409) disposed on the top of the second moving body (408), a second V-shaped frame disposed above the second lifting platform (409), a second lifting cylinder (410) disposed inside the second moving body (408) and connected to the second lifting platform (409), and a plurality of casters disposed at the bottom of the second moving body (408).

7. An automatic sandblasting device for oil pipe couplings and short sections according to claim 1, characterized in that, The feeding frame (1) includes several first support frames (101) and a first feeding box (102) mounted on the first support frames (101) and having an opening at its top. The first feeding box (102) is generally Z-shaped and its tilt angle satisfies the requirement that the oil pipe coupling or the short section slides from one end of the first feeding box (102) to the other end.

8. An automatic sandblasting device for oil pipe couplings and short sections according to claim 1, characterized in that, The feeding frame (3) includes several second support frames (301) and a second feeding box (302) mounted on the second support frames (301) and having an opening at its top. The second feeding box (302) is generally Z-shaped and its tilt angle satisfies the requirement that the oil pipe coupling or the short section slides from one end of the second feeding box (302) to the other end.

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