A rotary lifting device for cleaning inside oil storage tanks and its operating method.

Abstract

This invention relates to a rotary lifting device suitable for cleaning inside oil storage tanks. It includes a vertical oil storage tank and a guide unit and a rotary lifting unit installed inside the tank. The top of the vertical oil storage tank has a suitable inspection port. The guide unit includes a straight track and a spiral track. The rotary lifting unit includes a drive motor and a lifting motor. A safety locking unit is installed inside the rotary lifting unit. The safety locking unit includes a turntable with four insertion holes on its surface, each containing a pressure rod. By incorporating the safety locking unit and the rotary lifting unit, when the drive motor is damaged, the entire device tends to move downwards, causing the positioning gear, rotating shaft, and turntable to rotate. This engages the notch on the pressure rod surface at the top with the edge of the irregularly shaped component, achieving the locking purpose and providing safety protection. This invention is suitable for widespread application and promotion.

Description

Technical Field

[0001] This invention belongs to the field of oil tank cleaning technology, specifically, it relates to a rotary lifting device and its operating method suitable for cleaning inside oil storage tanks. Background Technology

[0002] An oil tank is a container for storing petroleum and a key facility in oil depots. In pipeline transportation, it serves as the oil source interface for the pipeline. Based on their architectural features, they can be divided into above-ground oil tanks and underground oil tanks. Regular cleaning and maintenance of oil tanks helps extend pipeline life, improve transmission efficiency, and reduce energy consumption and leaks. Nowadays, when cleaning oil tanks, especially at higher elevations, scaffolding is used, which takes a long time to set up and poses safety risks.

[0003] In view of this, the present invention is proposed. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows: A rotary lifting device suitable for cleaning inside oil storage tanks includes a vertical oil storage tank and a guide unit and a rotary lifting unit installed inside the vertical oil storage tank. The vertical oil storage tank is equipped with a suitable maintenance port on its top. The guide unit includes a straight track and a spiral track, the two ends of which are connected to each other. The straight track is placed at the bottom of the vertical oil storage tank, and the straight track and spiral track are installed on the side wall of the vertical oil storage tank. A drive rack is installed on the surface of the straight track and spiral track. The rotary lifting unit includes a drive motor and a lifting motor. The output end of the drive motor is connected to a rotary shaft, and a positioning gear is welded to the end of the rotary shaft. The positioning gear meshes with the drive rack. The output end of the lifting motor is connected to a lead screw shaft, and a lead screw collar is meshed on the surface of the lead screw shaft. A safety locking unit is installed inside the rotary lifting unit. The safety locking unit includes a turntable with four holes on its surface. A pressure rod is inserted into each hole, and the side wall of the pressure rod has a notch. An irregularly shaped component is attached to the side wall of the turntable. The irregularly shaped component includes a vertical plate and a horizontal plate, which are welded alternately. The vertical plate fits the turntable, and the surface of the vertical plate has an inclined groove.

[0005] In a preferred embodiment of the present invention, a limiting slide rail is provided on the surface of the straight track and the spiral track, a limiting connecting block is slidably provided on the surface of the limiting slide rail, a connecting flange is overlapped on the surface of the limiting connecting block, a locking bolt is screwed between the connecting flange and the limiting connecting block, a guide seat is provided on the top of the connecting flange, and the surface of the guide seat is movably connected to the central shaft of the positioning gear.

[0006] In a preferred embodiment of the present invention, a first mounting bracket is installed on the side wall of the drive motor, an L-shaped bracket is installed at the bottom of the first mounting bracket, the end of the L-shaped bracket is placed at the bottom of the guide unit, and a synchronous slide rail is installed at the bottom of the straight track and the spiral track, and the L-shaped bracket is slidably arranged on the surface of the synchronous slide rail.

[0007] In a preferred embodiment of the present invention, a pair of bearing seats are installed on the side wall of the L-shaped bracket, and a bearing is snapped into the surface of each bearing seat. The inner wall of the bearing is snapped into both ends of the lead screw shaft. A top rod is welded to the side wall of the lead screw collar, and a processing platform is installed at the end of the top rod. The processing platform is placed above the guide unit. Several guardrails are provided on the side wall of the processing platform, and two limiting rods are vertically fixed at the bottom of the processing platform. Each limiting rod is movably inserted through the surface of the first mounting bracket.

[0008] In a preferred embodiment of the present invention, a collar is sleeved on the surface of the lead screw shaft, and the collar is squeezed by the bearing seat and the lead screw collar on both sides. A synchronous bracket is installed on both sides of the collar. The synchronous bracket is L-shaped and a positioning rod is installed on the surface of the synchronous bracket. Several pairs of positioning holes are opened at the bottom of the straight track and the spiral track. Each positioning hole corresponds to each tooth of the drive rack. The positioning hole is vertically corresponding to the positioning rod.

[0009] In a preferred embodiment of the present invention, a platform is installed at the bottom of the L-shaped bracket, a pair of sleeves are installed on the surface of the platform, a return spring is snapped inside the pair of sleeves, a plug is fixedly installed on the surface of the return spring, the plug movably penetrates the side wall of the plug, and the end of the plug is fixedly installed at the bottom of the synchronous bracket.

[0010] In a preferred embodiment of the present invention, a push rod is vertically fixedly provided on the side wall of the synchronous support, a guide seat is movably sleeved on the side wall of the push rod, the side wall of the guide seat is welded to the side wall of the L-shaped support, a fixing block is installed on the top of the push rod, a slide rod is fixedly provided on the surface of the fixing block, the slide rod slides inside the inclined groove, and the inclined groove tends to tilt outward.

[0011] In a preferred embodiment of the present invention, a guide rod is movably provided through the mounting lug of the side wall of the vertical plate, and a second mounting bracket is fixedly provided at both ends of the guide rod. The second mounting bracket is welded to the side wall of the first mounting bracket.

[0012] In a preferred embodiment of the present invention, a rotating shaft is installed at the center of the turntable, and an installation hole is provided inside the turntable. The installation hole is coaxial with the insertion hole. A swing arm is movably arranged between the four pressure rods located on the inner side of the turntable. A baffle is installed on the side wall of the pressure rod. The baffle is placed inside the installation hole, and a return spring is engaged between the baffle and the installation hole.

[0013] As a preferred embodiment of the present invention, a method for operating a rotary lifting device suitable for cleaning inside oil storage tanks includes the following steps: Step 1: When it is necessary to clean the residual oil stains inside the vertical oil storage tank, the oil inside the vertical oil storage tank must first be drained, the pipeline closed, the inspection port on the top of the oil storage tank opened, and the device hoisted into the vertical oil storage tank and installed inside the guide unit on the inner wall of the vertical oil storage tank, with the operator standing on the surface of the processing platform. Step 2: Next, start the drive motor. The drive motor drives the output shaft to rotate. After the rotating shaft rotates, it drives the positioning gear on the surface to start rotating. At this time, the positioning gear can move along the drive rack on the straight track and the spiral track, so that the device can be lifted along the straight track and the spiral track, thus achieving the purpose of lifting the position of the device. Step 3: After moving to the designated position, the operator needs to stop the start drive motor and turn on the lifting motor. The lifting motor drives the lead screw shaft to start rotating. The lead screw shaft surface is equipped with a lead screw collar. The lead screw collar then begins to move the top rod processing platform upward, which serves to lift the processing platform and ensures that it can still move up and down at the designated position, thus expanding the cleaning range. Step 4: During the up-and-down movement of the processing platform, the lead screw collar on the surface moves upward. After the lead screw collar moves upward, the distance between the bottom of the lead screw collar and the bearing seat increases. At this time, the return spring inside the sleeve pushes the insert rod upward, thereby moving the synchronous bracket upward synchronously. The collar in the center of the synchronous bracket slides on the lead screw shaft until the positioning rod at the end of the synchronous bracket is inserted into the positioning hole, ensuring that the position of the device and the guide unit are integrated at this time, which improves the safety of high-altitude operations. Step 5: After the synchronous bracket moves upward, it drives the push rod to move upward. The push rod moves vertically upward along the guide seat, and a slide rod is installed at the end of the push rod. At this time, the surface of the slide rod slides in connection with the inclined slide groove. As the slide rod moves upward, it pushes the irregular component with the inclined slide groove to move towards the center. The irregular component moves along the guide rod, which supports and guides the movement of the irregular component. As the irregular component moves towards the center, it causes the vertical plate to press against the pressure rod, while the pressure rods on both sides press inward. The swing arm drives the top pressure rod to move upward, and the return spring inside the pressure rod facilitates later reset. If the drive motor is damaged, the whole device tends to move downward, driving the positioning gear, rotating shaft and turntable to rotate, and locking the notch on the surface of the top pressure rod at the edge of the irregular component, thereby achieving the purpose of locking and playing a safety protection role.

[0014] Compared with the prior art, the present invention has the following advantages: The device is equipped with a rotary lifting unit. When the drive motor is started, the output shaft rotates. After the shaft rotates, the positioning gear on the surface starts to rotate. The positioning gear can move along the drive rack on the straight track and the spiral track, thereby lifting the device along the straight track and the spiral track, achieving the purpose of lifting the device position. The lifting motor drives the lead screw shaft to rotate. The lead screw shaft surface is equipped with a lead screw collar. The lead screw collar then begins to move the top rod processing platform upward, achieving the purpose of lifting the processing platform. This ensures that it can move up and down at the designated position, expanding the cleaning range. By incorporating a safety locking unit, when the drive motor is damaged, the entire device tends to move downwards, causing the positioning gear, rotating shaft, and turntable to rotate. This engages the notch on the top pressure rod surface with the edge of the irregularly shaped component, thus achieving the locking purpose and providing safety protection.

[0015] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0016] In the attached diagram: Figure 1 A schematic diagram of the overall installation structure of a rotary lifting device suitable for cleaning inside oil storage tanks; Figure 2 A rotary lifting device suitable for cleaning inside oil storage tanks. Figure 1 Internal structure diagram; Figure 3 A rotary lifting device suitable for cleaning inside oil storage tanks. Figure 2 Enlarged view of point A; Figure 4A rotary lifting device suitable for cleaning inside oil storage tanks. Figure 3 3D diagram; Figure 5 A rotary lifting device suitable for cleaning inside oil storage tanks. Figure 4 A bottom view; Figure 6 A rotary lifting device suitable for cleaning inside oil storage tanks. Figure 3 Top view; Figure 7 A rotary lifting device suitable for cleaning inside oil storage tanks. Figure 6 Enlarged view of point B; Figure 8 This is a cross-sectional view of the turntable of a rotary lifting device suitable for cleaning inside oil storage tanks.

[0017] In the picture: 101. Vertical oil storage tank; 1011. Inspection port; 200. Guide unit; 201. Straight track; 2011. Drive rack; 2012. Positioning hole; 202. Spiral track; 203. Limiting slide rail; 2031. Limiting connecting block; 300. Rotary lifting unit; 301. First mounting bracket; 3011. Bearing seat; 3012. Limiting rod; 3013. L-shaped bracket; 3014. Synchronous slide rail; 302. Drive motor; 3021. Rotary shaft; 3022. Positioning gear; 303. Connecting flange; 304. Lifting motor; 3041. Lead screw shaft; 3042. Lead screw collar; 305. Top rod; 3051. Machining platform; 400. Safety locking unit; 401. Collar; 4011. Synchronization bracket; 4012. Positioning rod; 402. Insert rod; 4021. Sleeve; 403. Push rod; 4031. Guide seat; 4032. Fixing block; 4033. Slide rod; 404. Irregular component; 4041. Vertical plate; 4042. Horizontal plate; 4043. Inclined slide groove; 405. Turntable; 4051. Insertion hole; 4052. Mounting hole; 406. Pressure rod; 4061. Swing arm; 4062. Baffle; 4063. Return spring; 4064. Notch; 407. Guide rod; 4071. Second mounting bracket. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention.

[0019] Example 1: like Figures 1 to 8As shown, a rotary lifting device suitable for cleaning inside oil storage tanks includes a vertical oil storage tank 101 and a guide unit 200 and a rotary lifting unit 300 installed inside the vertical oil storage tank. The top of the vertical oil storage tank 101 is provided with a suitable maintenance port 1011; The guide unit 200 includes a straight track 201 and a spiral track 202. The two ends of the straight track 201 and the spiral track 202 are connected to each other. The straight track 201 is placed at the bottom of the vertical oil storage tank 101. The straight track 201 and the spiral track 202 are installed on the side wall of the vertical oil storage tank 101. A drive rack 2011 is installed on the surface of the straight track 201 and the spiral track 202. The rotary lifting unit 300 includes a drive motor 302 and a lifting motor 304. A rotating shaft 3021 is connected to the output end of the drive motor 302, and a positioning gear 3022 is welded to the end of the rotating shaft 3021. The positioning gear 3022 meshes with a drive rack 2011. A lead screw shaft 3041 is connected to the output end of the lifting motor 304, and a lead screw collar 3042 is meshed on the surface of the lead screw shaft 3041. A safety locking unit 400 is installed inside the rotary lifting unit 300. By configuring the rotary lifting unit, the drive motor is started, and the drive motor... The rotating shaft of the output shaft rotates, which in turn drives the positioning gear on the surface to rotate. At this time, the positioning gear can move along the drive rack on the straight track and the spiral track, thereby raising the device along the straight track and the spiral track, achieving the purpose of lifting the device position. The lifting motor drives the lead screw shaft to rotate, and the lead screw shaft surface is meshed with a lead screw collar. The lead screw collar then begins to move the top rod processing platform upward, achieving the purpose of raising the processing platform, ensuring that it can still move up and down at the designated position, and expanding the cleaning range.

[0020] The safety locking unit 400 includes a turntable 405 with four insertion holes 4051 on its surface. A pressure rod 406 is inserted into each insertion hole 4051, and a notch 4064 is provided on the side wall of the pressure rod 406. A shaped component 404 is attached to the side wall of the turntable 405. The shaped component 404 includes a vertical plate 4041 and a horizontal plate 4042, which are staggered and welded together. The vertical plate 4041 fits snugly against the turntable 405, and an inclined groove 4043 is provided on its surface. By incorporating the safety locking unit, when the drive motor is damaged, the entire device tends to move downwards, causing the positioning gear, rotating shaft, and turntable to rotate. This engages the notch on the top pressure rod with the edge of the shaped component, achieving the locking purpose and providing safety protection.

[0021] like Figures 1 to 8As shown, in a specific embodiment, a limiting slide rail 203 is provided on the surface of the straight track 201 and the spiral track 202. A limiting connecting block 2031 is slidably provided on the surface of the limiting slide rail 203. A connecting flange 303 is overlapped on the surface of the limiting connecting block 2031. A locking bolt is screwed between the connecting flange 303 and the limiting connecting block 2031. A guide seat is provided on the top of the connecting flange 303, and the surface of the guide seat is movably connected to the central shaft of the positioning gear 3022. When it is necessary to clean the residual oil stains inside the vertical oil storage tank 101, the oil inside the vertical oil storage tank 101 must first be drained, the pipeline closed, the inspection port 1011 on the top of the oil storage tank opened, and the device hoisted into the vertical oil storage tank 101 and installed inside the guide unit 200 on the inner wall of the vertical oil storage tank 101. The operator stands on the surface of the processing platform 3051. Next, the drive motor 302 is started, which drives the output shaft 3021 to rotate. After the rotating shaft 3021 rotates, it drives the positioning gear 3022 on the surface to start rotating. At this time, the positioning gear 3022 can move along the drive rack 2011 on the straight track 201 and the spiral track 202, thereby making the device lift along the straight track 201 and the spiral track 202, thus achieving the purpose of lifting the device position.

[0022] like Figures 1 to 8 As shown, a first mounting bracket 301 is further installed on the side wall of the drive motor 302. An L-shaped bracket 3013 is installed at the bottom of the first mounting bracket 301, with the end of the L-shaped bracket 3013 positioned at the bottom of the guide unit 200. A synchronous slide rail 3014 is installed at the bottom of the straight track 201 and the spiral track 202, and the L-shaped bracket 3013 is slidably mounted on the surface of the synchronous slide rail 3014. The L-shaped bracket 3013 serves as a support, acting as the support center of the device.

[0023] Example 2: The difference between the above embodiments and this embodiment is that: like Figures 1 to 8As shown, a pair of bearing seats 3011 are installed on the side wall of the L-shaped bracket 3013. Each bearing seat 3011 has a bearing snapped into its surface. The inner wall of the bearing is snapped into both ends of the lead screw shaft 3041. A top rod 305 is welded to the side wall of the lead screw collar 3042, and a processing platform 3051 is installed at the end of the top rod 305. The processing platform 3051 is placed above the guide unit 200. Several guardrails are provided on the side wall of the processing platform 3051, and two limit rods 3012 are vertically fixed at the bottom of the processing platform 3051. Each limit rod 3012 is movably inserted through the surface of the first mounting bracket 301. After moving to the designated position, the operator needs to stop the start drive motor 302 and turn on the lifting motor 304. The lifting motor 304 drives the lead screw shaft 3041 to start rotating. The lead screw shaft 3041 is fitted with a lead screw collar 3042 on its surface. The lead screw collar 3042 then begins to move the top rod 305 and the processing platform 3051 upwards, which raises the processing platform 3051 and ensures that it can still move up and down at the designated position, thus expanding the cleaning range.

[0024] like Figures 1 to 8 As shown, in a specific embodiment, a collar 401 is sleeved on the surface of the lead screw shaft 3041, and the collar 401 is pressed on both sides by the bearing seat 3011 and the lead screw collar 3042. Synchronous brackets 4011 are installed on both sides of the collar 401. The synchronous brackets 4011 are L-shaped, and positioning rods 4012 are installed on the surface of the synchronous brackets 4011. Several pairs of positioning holes 2012 are opened at the bottom of the straight track 201 and the spiral track 202. Each positioning hole 2012 corresponds to each tooth of the drive rack 2011, and the positioning hole 2012 corresponds vertically to the positioning rod 4012. A platform is installed at the bottom of the L-shaped bracket 3013. A pair of sleeves 4021 are installed on the surface of the platform. A return spring is snapped into the inside of the pair of sleeves 4021. A plug rod 402 is fixedly installed on the surface of the return spring. The plug rod 402 movably penetrates and inserts into the side wall of the plug rod 402. The end of the plug rod 402 is fixedly installed at the bottom of the synchronous bracket 4011. During the up-and-down movement of the processing platform 3051, the lead screw collar 3042 on the surface moves upward. After the lead screw collar 3042 moves upward, the distance between the bottom of the lead screw collar 3042 and the bearing seat 3011 increases. At this time, the return spring located inside the sleeve 4021 pushes the insert rod 402 to move upward, thereby moving the synchronous bracket 4011 upward synchronously. The collar 401 at the center of the synchronous bracket 4011 slides on the lead screw shaft 3041 until the positioning rod 4012 at the end of the synchronous bracket 4011 is inserted into the positioning hole 2012. This ensures that the position of the device and the guide unit 200 are integrated at this time, improving the safety of high-altitude operations.

[0025] Example 3: The difference between the above embodiments and this embodiment is that: like Figures 1 to 8 As shown, a push rod 403 is vertically fixed to the side wall of the synchronous bracket 4011. A guide seat 4031 is movably sleeved on the side wall of the push rod 403. The side wall of the guide seat 4031 is welded to the side wall of the L-shaped bracket 3013. A fixing block 4032 is installed on the top of the push rod 403. A slide rod 4033 is fixedly installed on the surface of the fixing block 4032. The slide rod 4033 slides inside the inclined slide groove 4043, and the inclined slide groove 4043 tends to tilt outward. After the synchronous bracket 4011 moves upward synchronously, it drives the push rod 403 to start moving upward. At this time, the push rod 403 moves vertically upward along the guide seat 4031, and the slide rod 4033 is installed at the end of the push rod 403. At this time, the surface of the slide rod 4033 is slidably connected with the inclined slide groove 4043. As the slide rod 4033 continues to move upward, it pushes the irregular component 404 with the inclined slide groove 4043 to start moving towards the center.

[0026] like Figures 1 to 8 As shown, in a specific embodiment, a guide rod 407 is movably provided through the mounting lug on the side wall of the vertical plate 4041. Second mounting brackets 4071 are fixedly provided at both ends of the guide rod 407, and the second mounting brackets 4071 are welded to the side wall of the first mounting bracket 301. The irregularly shaped component 404 moves along the guide rod 407, which serves to support and guide its movement.

[0027] like Figures 1 to 8 As shown, a rotating shaft 3021 is installed at the center of the turntable 405. A mounting hole 4052 is provided inside the turntable 405. The mounting hole 4052 is coaxial with the insertion hole 4051. A swing arm 4061 is movably arranged between the four pressure rods 406 located inside the turntable 405. A baffle 4062 is installed on the side wall of the pressure rod 406. The baffle 4062 is placed inside the mounting hole 4052. A return spring 4063 is engaged between the baffle 4062 and the mounting hole 4052. The irregular component 404 begins to move towards the center, causing the vertical plate 4041 to press against the pressure rod 406. Meanwhile, the pressure rods 406 on both sides press inward. The swing arm 4061 drives the top pressure rod 406 to move upward. The return spring 4063 inside the pressure rod 406 facilitates later reset. When the drive motor 302 is damaged, the entire device tends to move downward, causing the positioning gear 3022, rotating shaft 3021, and turntable 405 to rotate. This causes the notch 4064 on the surface of the top pressure rod 406 to engage with the edge of the irregular component 404, thereby achieving the locking purpose and playing a safety protection role.

[0028] The present invention also discloses an operating method for a rotary lifting device applicable to cleaning inside oil storage tanks, the steps of which are as follows: Step 1: When it is necessary to clean the residual oil stains inside the vertical oil storage tank 101, the oil inside the vertical oil storage tank 101 must first be drained, the pipeline closed, the inspection port 1011 on the top of the oil storage tank opened, and the device hoisted into the vertical oil storage tank 101 and installed inside the guide unit 200 on the inner wall of the vertical oil storage tank 101, with the operator standing on the surface of the processing platform 3051. Step 2: Next, start the drive motor 302. The drive motor 302 drives the output shaft 3021 to rotate. After the rotating shaft 3021 rotates, it drives the positioning gear 3022 on the surface to start rotating. At this time, the positioning gear 3022 can move along the drive rack 2011 on the straight track 201 and the spiral track 202, thereby making the device lift along the straight track 201 and the spiral track 202, thus achieving the purpose of lifting the position of the device. Step 3: After moving to the designated position, the operator needs to stop starting the drive motor 302 and start the lifting motor 304. The lifting motor 304 drives the lead screw shaft 3041 to start rotating. The lead screw shaft 3041 is equipped with a lead screw collar 3042 on its surface. The lead screw collar 3042 then begins to move the top rod 305 and the processing platform 3051 upwards, which raises the processing platform 3051 and ensures that it can still move up and down at the designated position, thus expanding the cleaning range. Step 4: During the up-and-down movement of the processing platform 3051, the lead screw collar 3042 on the surface moves upward. After the lead screw collar 3042 moves upward, the distance between the bottom of the lead screw collar 3042 and the bearing seat 3011 increases. At this time, the return spring inside the sleeve 4021 pushes the insertion rod 402 to move upward, thereby moving the synchronous bracket 4011 upward synchronously. The collar 401 in the center of the synchronous bracket 4011 slides on the lead screw shaft 3041 until the positioning rod 4012 at the end of the synchronous bracket 4011 is inserted into the positioning hole 2012. This ensures that the position of the device and the guide unit 200 are integrated at this time, improving the safety of high-altitude operations. Step 5: After the synchronous bracket 4011 moves upward synchronously, it drives the push rod 403 to move upward. The push rod 403 moves vertically upward along the guide seat 4031, and a slide rod 4033 is installed at the end of the push rod 403. The surface of the slide rod 4033 is slidably connected to the inclined groove 4043. As the slide rod 4033 moves upward, it pushes the irregularly shaped component 404 with the inclined groove 4043 to move towards the center. The irregularly shaped component 404 moves along the guide rod 407, which supports and guides its movement. The device begins to move towards the center, causing the vertical plate 4041 to press against the pressure rod 406. The pressure rods 406 on both sides press inward, and the top pressure rod 406 moves upward through the swing arm 4061. The return spring 4063 inside the pressure rod 406 facilitates later reset. When the drive motor 302 is damaged, the entire device tends to move downward, causing the positioning gear 3022, rotating shaft 3021 and turntable 405 to rotate. This causes the notch 4064 on the surface of the top pressure rod 406 to engage with the edge of the irregular component 404, thereby achieving the purpose of locking and playing a safety protection role.

[0029] The implementation principle of the rotary lifting device and its operation method applicable to cleaning inside oil storage tanks in this embodiment is as follows: When it is necessary to clean the residual oil stains inside the vertical oil storage tank 101, the oil inside the vertical oil storage tank 101 must first be drained, the pipeline closed, the inspection port 1011 on the top of the oil storage tank opened, and the device hoisted into the vertical oil storage tank 101 and installed inside the guide unit 200 on the inner wall of the vertical oil storage tank 101, with the operator standing on the surface of the processing platform 3051.

[0030] Next, the drive motor 302 is started, which drives the output shaft 3021 to rotate. After the rotating shaft 3021 rotates, it drives the positioning gear 3022 on the surface to start rotating. At this time, the positioning gear 3022 can move along the drive rack 2011 on the straight track 201 and the spiral track 202, thereby making the device lift along the straight track 201 and the spiral track 202, thus achieving the purpose of lifting the device position.

[0031] Once the device is moved to the designated position, the operator needs to stop the start drive motor 302 and turn on the lifting motor 304. The lifting motor 304 drives the lead screw shaft 3041 to start rotating. The lead screw shaft 3041 has a lead screw collar 3042 meshing on its surface. The lead screw collar 3042 then begins to move the top rod 305 and the processing platform 3051 upwards, thus raising the processing platform 3051 and ensuring that it can still move up and down at the designated position, expanding the cleaning range.

[0032] During the up-and-down movement of the processing platform 3051, the lead screw collar 3042 on the surface moves upward. After the lead screw collar 3042 moves upward, the distance between the bottom of the lead screw collar 3042 and the bearing seat 3011 increases. At this time, the return spring located inside the sleeve 4021 pushes the insert rod 402 to move upward, thereby moving the synchronous bracket 4011 upward synchronously. The collar 401 at the center of the synchronous bracket 4011 slides on the lead screw shaft 3041 until the positioning rod 4012 at the end of the synchronous bracket 4011 is inserted into the positioning hole 2012. This ensures that the position of the device and the guide unit 200 are integrated at this time, improving the safety of high-altitude operations.

[0033] After the synchronous support 4011 moves upward synchronously, it drives the push rod 403 to move upward. The push rod 403 then moves vertically upward along the guide seat 4031, and a slide rod 4033 is installed at the end of the push rod 403. The surface of the slide rod 4033 is slidably connected to the inclined groove 4043. As the slide rod 4033 moves upward, it pushes the irregularly shaped component 404 with the inclined groove 4043 to move towards the center. The irregularly shaped component 404 moves along the guide rod 407, which supports and guides its movement. Moving towards the center causes the vertical plate 4041 to press against the pressure rod 406, while the pressure rods 406 on both sides press inward. The swing arm 4061 drives the top pressure rod 406 to move upward, and the return spring 4063 inside the pressure rod 406 facilitates later reset. When the drive motor 302 is damaged, the entire device tends to move downward, driving the positioning gear 3022, rotating shaft 3021 and turntable 405 to rotate, locking the notch 4064 on the surface of the top pressure rod 406 against the edge of the irregular component 404, thereby achieving the purpose of locking and playing a safety protection role.

Claims

1. A rotary lifting device suitable for cleaning inside oil storage tanks, comprising a vertical oil storage tank (101) and a guide unit (200) and a rotary lifting unit (300) installed inside the vertical oil storage tank, characterized in that, The vertical oil storage tank (101) has a suitable maintenance port (1011) on its top. The guide unit (200) includes a straight track (201) and a spiral track (202). The two ends of the straight track (201) and the spiral track (202) are connected to each other. The straight track (201) is placed at the bottom of the vertical oil storage tank (101). The straight track (201) and the spiral track (202) are installed on the side wall of the vertical oil storage tank (101). A drive rack (2011) is installed on the surface of the straight track (201) and the spiral track (202). The rotary lifting unit (300) includes a drive motor (302) and a lifting motor (304). A rotating shaft (3021) is connected to the output end of the drive motor (302). A positioning gear (3022) is welded to the end of the rotating shaft (3021) and meshes with a drive rack (2011). A lead screw shaft (3041) is connected to the output end of the lifting motor (304). A lead screw collar (3042) is meshed on the surface of the lead screw shaft (3041). The lifting unit (300) is equipped with a safety locking unit (400); a first mounting bracket (301) is installed on the side wall of the drive motor (302), and an L-shaped bracket (3013) is installed at the bottom of the first mounting bracket (301). The end of the L-shaped bracket (3013) is placed at the bottom of the guide unit (200), and a synchronous slide rail (3014) is installed at the bottom of the straight track (201) and the spiral track (202). The L-shaped bracket (3013) is slidably arranged on the surface of the synchronous slide rail (3014). The L-shaped bracket (3013) has a pair of bearing seats (3011) installed on its side wall. Each bearing seat (3011) has a bearing snapped into its surface. The inner wall of the bearing is snapped into both ends of the lead screw shaft (3041). The lead screw collar (3042) has a top rod (305) welded to its side wall. A processing platform (3051) is installed at the end of the top rod (305). The processing platform (3051) is placed above the guide unit (200). The processing platform (3051) has several guardrails on its side wall. Two limit rods (3012) are vertically fixed at the bottom of the processing platform (3051). Each limit rod (3012) is movably inserted into the surface of the first mounting bracket (301). The safety locking unit (400) includes a turntable (405), the surface of which has four holes (4051), each hole (4051) is fitted with a pressure rod (406), and the side wall of the pressure rod (406) has a notch (4064). The side wall of the turntable (405) is fitted with a shaped component (404), the shaped component (404) includes a vertical plate (4041) and a horizontal plate (4042), the vertical plate (4041) and the horizontal plate (4042) are welded in an alternating manner, and the vertical plate (4041) is attached to the turntable (405). The surface of the vertical plate (4041) is inclined with an inclined groove (4043).

2. The rotary lifting device for cleaning inside oil storage tanks according to claim 1, characterized in that, The straight track (201) and the spiral track (202) are provided with limit slide rails (203), and limit connecting blocks (2031) are slidably provided on the surface of the limit slide rails (203). A connecting flange (303) is overlapped on the surface of the limit connecting block (2031). A locking bolt is screwed between the connecting flange (303) and the limit connecting block (2031). A guide seat is provided on the top of the connecting flange (303), and the surface of the guide seat is movably connected to the central shaft of the positioning gear (3022).

3. A rotary lifting device for cleaning inside oil storage tanks according to claim 1, characterized in that, A collar (401) is sleeved on the surface of the lead screw shaft (3041), and the collar (401) is squeezed by the bearing seat (3011) and the lead screw collar (3042) on both sides. A synchronous bracket (4011) is installed on both sides of the collar (401). The synchronous bracket (4011) is L-shaped. A positioning rod (4012) is installed on the surface of the synchronous bracket (4011). Several pairs of positioning holes (2012) are opened at the bottom of the straight track (201) and the spiral track (202). Each positioning hole (2012) corresponds to each tooth of the drive rack (2011). The positioning hole (2012) is vertically corresponding to the positioning rod (4012).

4. A rotary lifting device for cleaning inside oil storage tanks according to claim 1, characterized in that, The L-shaped bracket (3013) has a platform installed at its bottom. A pair of sleeves (4021) are installed on the surface of the platform. A reset spring is snapped into the inside of the pair of sleeves (4021). A plug rod (402) is fixedly installed on the surface of the reset spring. The plug rod (402) is movably inserted through the side wall of the plug rod (402). The end of the plug rod (402) is fixedly installed at the bottom of the synchronous bracket (4011).

5. A rotary lifting device for cleaning inside oil storage tanks according to claim 4, characterized in that, A push rod (403) is vertically fixed on the side wall of the synchronous bracket (4011). A guide seat (4031) is movably sleeved on the side wall of the push rod (403). The side wall of the guide seat (4031) is welded to the side wall of the L-shaped bracket (3013). A fixing block (4032) is installed on the top of the push rod (403). A slide rod (4033) is fixedly installed on the surface of the fixing block (4032). The slide rod (4033) slides inside the inclined slide groove (4043), and the inclined slide groove (4043) tends to tilt outward.

6. A rotary lifting device for cleaning inside oil storage tanks according to claim 1, characterized in that, The mounting lugs on the side wall of the vertical plate (4041) are movably provided with guide rods (407), and the two ends of the guide rods (407) are fixedly provided with second mounting brackets (4071), which are welded to the side wall of the first mounting bracket (301).

7. A rotary lifting device for cleaning inside oil storage tanks according to claim 1, characterized in that, A rotating shaft (3021) is installed at the center of the turntable (405). An installation hole (4052) is opened inside the turntable (405). The installation hole (4052) is coaxial with the insertion hole (4051). A swing arm (4061) is movably arranged between the four pressure rods (406) located inside the turntable (405). A baffle (4062) is installed on the side wall of the pressure rod (406). The baffle (4062) is placed inside the installation hole (4052). A return spring (4063) is snapped between the baffle (4062) and the installation hole (4052).

8. An operating method for a rotary lifting device suitable for cleaning inside oil storage tanks, characterized in that, The rotary lifting device for cleaning inside oil storage tanks, as described in any one of claims 1 to 7, comprises the following steps: Step 1: When it is necessary to clean the residual oil stains inside the vertical oil storage tank (101), the oil inside the vertical oil storage tank (101) must first be drained, the pipeline closed, the inspection port (1011) on the top of the oil storage tank opened, and the device hoisted into the vertical oil storage tank (101) and installed inside the guide unit (200) on the inner wall of the vertical oil storage tank (101), and the operator stands on the surface of the processing platform (3051); Step 2: Next, start the drive motor (302). The drive motor (302) drives the output shaft (3021) to rotate. After the rotating shaft (3021) rotates, it drives the positioning gear (3022) on the surface to start rotating. At this time, the positioning gear (3022) can move along the drive rack (2011) on the straight track (201) and the spiral track (202), so that the device can be lifted along the straight track (201) and the spiral track (202), thus achieving the purpose of lifting the position of the device. Step 3: After moving to the designated position, the operator needs to stop starting the drive motor (302) and turn on the lifting motor (304). The lifting motor (304) drives the lead screw shaft (3041) to start rotating. The lead screw shaft (3041) is fitted with a lead screw collar (3042) on its surface. The lead screw collar (3042) then begins to move the top rod (305) and the processing platform (3051) upwards, which raises the processing platform (3051) and ensures that it can still move up and down at the designated position, thus expanding the cleaning range. Step 4: During the up-and-down movement of the processing platform (3051), the lead screw collar (3042) on the surface moves upward. After the lead screw collar (3042) moves upward, the distance between the bottom of the lead screw collar (3042) and the bearing seat (3011) increases. At this time, the return spring inside the sleeve (4021) pushes the insert rod (402) to move upward, thereby moving the synchronous bracket (4011) upward synchronously. The collar (401) in the center of the synchronous bracket (4011) slides on the lead screw shaft (3041) until the positioning rod (4012) at the end of the synchronous bracket (4011) is inserted into the positioning hole (2012), ensuring that the position of the device and the guide unit (200) are integrated at this time, which improves the safety of high-altitude operations. Step 5: After the synchronous support (4011) moves upward synchronously, it drives the push rod (403) to start moving upward. At this time, the push rod (403) moves vertically upward along the guide seat (4031), and a slide rod (4033) is installed at the end of the push rod (403). At this time, the surface of the slide rod (4033) is slidably connected with the inclined slide groove (4043). As the slide rod (4033) moves upward continuously, it pushes the irregular component (404) with the inclined slide groove (4043) to start moving towards the center. The irregular component (404) moves along the guide rod (407), which supports and guides the movement of the irregular component (404). The device begins to move towards the center, causing the vertical plate (4041) to press against the pressure rod (406), while the pressure rods (406) on both sides press inward. The top pressure rod (406) moves upward through the swing arm (4061), and the return spring (4063) inside the pressure rod (406) facilitates later reset. When the drive motor (302) is damaged, the device as a whole tends to move downward, causing the positioning gear (3022), rotating shaft (3021) and turntable (405) to rotate, and the notch (4064) on the surface of the top pressure rod (406) is engaged with the edge of the irregular component (404), thereby achieving the purpose of locking and playing a safety protection role.

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