A lifting system and method for a steel storage tank

Abstract

This invention provides a lifting system and method for steel storage tanks, comprising several lifting units evenly distributed along the inner circumference of the tank body. Each lifting unit includes an I-beam pile, vertically positioned inside the tank body and close to the inner surface of the tank wall. A power mechanism is located at the top of the I-beam pile. A climbing mechanism is vertically slidably mounted on the I-beam pile and close to one side of the tank wall. One side of the climbing mechanism is vertically slidably connected to the I-beam pile, and the other side is in contact with an annular expansion ring. The upper end of the lifting rope is connected to the output end of the power mechanism, and the lower end of the lifting rope is connected to the climbing mechanism. This invention utilizes the power mechanism to drive the climbing mechanism vertically up and down via the lifting rope, achieving the purpose of lifting the tank body and avoiding the swaying of the tank body caused by wind load. Simultaneously, it ensures that the tank body is evenly stressed in the circumferential direction.

Description

Technical Field

[0001] This invention belongs to the technical field of storage tank construction equipment, and specifically relates to a lifting system and method for steel storage tanks. Background Technology

[0002] Steel storage tanks, as storage equipment, are generally composed of several tank bodies welded together along the centerline. Steel storage tanks are often welded using the inverted assembly method. The specific processing steps are as follows: after the assembled tank body is vertically lifted to a preset height, the next ring of tank bodies is assembled below the assembled tank body. Then, the assembled tank body is lowered above the next ring of tank bodies for the next stage of assembly and welding.

[0003] For the vertical lifting of the assembled cylinder, multiple lifting devices are typically distributed around the inner circumference of the cylinder, and the assembled cylinder is suspended and lifted using steel chains or wire ropes. Currently, most existing lifting equipment uses manual hoists, electric hoists, or hydraulic jacks. However, after the assembled cylinder is lifted, it is prone to swaying under wind loads, making it difficult to align with the next ring of cylinders, increasing construction difficulty and posing significant safety risks. Secondly, the misalignment of the lifting point and the lifting equipment in the circumferential direction during lifting causes uneven stress on the assembled cylinder, leading to circumferential deflection. Furthermore, uneven vertical stress on the various lifting devices during lifting can cause the assembled cylinder to tilt or cause abnormal stress on a particular lifting device, resulting in damage. Summary of the Invention

[0004] To address the technical problems existing in the prior art, the present invention provides a lifting system and method for steel storage tanks, which solves the technical problems in the prior art that the welded cylinder is prone to swaying under wind load during vertical lifting, the welded cylinder is subject to uneven force in the circumferential direction and circumferential deflection, and the uneven force on each lifting device in the vertical direction during the lifting process causes the entire lifting tank to tip over or a certain lifting device to be damaged due to abnormal force.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] The present invention provides a lifting system for steel storage tanks, comprising a plurality of lifting units; the plurality of lifting units are evenly distributed along the inner circumferential surface of the steel storage tank to be constructed; wherein the tank body is welded from a plurality of tank wall plates, and an annular expansion ring is provided on the inner circumferential surface of the tank body;

[0007] The lifting unit includes a power mechanism, a lifting rope, a climbing mechanism, and an I-shaped pile.

[0008] The I-shaped pile is vertically positioned inside the tank body and close to the inner surface of the tank wall; the power mechanism is located at the top of the I-shaped pile.

[0009] The climbing mechanism is vertically slidably mounted on the I-shaped pile and positioned near the tank wall. One side of the climbing mechanism is vertically slidably connected to the I-shaped pile, and the other side of the climbing mechanism is in contact with the annular expansion ring. The upper end of the lifting rope is connected to the output end of the power mechanism, and the lower end of the lifting rope is connected to the climbing mechanism.

[0010] Furthermore, it also includes three sets of support mechanisms; all three sets of support mechanisms are inclinedly arranged between the I-shaped pile and the bottom of the steel storage tank to be constructed; the upper end of the support mechanism is connected to the upper end of the I-shaped pile, and the lower end of the support mechanism is connected to the bottom of the steel storage tank to be constructed.

[0011] The first set of support mechanisms is inclinedly arranged on the side of the I-shaped pile and close to the center of the tank body; the second set of support mechanisms is inclinedly arranged at the front end of the I-shaped pile and close to the previous lifting unit; the third set of support mechanisms is inclinedly arranged at the rear end of the I-shaped pile and close to the next lifting unit.

[0012] Furthermore, the support mechanism includes a double-forked rod and a support base plate; the double-forked rod is inclined, and the support base plate is horizontally fixed to the upper surface of the tank bottom; wherein, the upper end of the double-forked rod is connected to the upper end of the I-shaped pile, and the lower end of the double-forked rod is connected to the support base plate; wherein, the double-forked rod and the I-shaped pile, as well as the double-forked rod and the support base plate, are connected by pins.

[0013] Furthermore, the I-shaped pile body includes a top plate, a left side plate, a middle vertical plate, a bottom plate, and a right side plate;

[0014] The top plate and bottom plate of the pile are arranged parallel to each other vertically, and the bottom plate of the pile is horizontally fixed to the upper surface of the bottom of the steel storage tank to be constructed; the left side plate and the right side plate are arranged vertically parallel between the top plate and the bottom plate of the pile; wherein, the left side plate is located near the inner surface of the tank wall, and the right side plate is located near the center of the tank body.

[0015] The intermediate vertical plate is vertically disposed between the left side plate and the right side plate, and the intermediate vertical plate is disposed radially along the tank body; wherein, one end of the intermediate vertical plate is fixed perpendicularly to the vertical center line of the left side plate, and the other end of the intermediate vertical plate is fixed perpendicularly to the vertical center line of the right side plate.

[0016] The power mechanism is fixedly mounted on the top plate of the pile body and is located near the left side plate; the climbing mechanism is vertically slidably mounted on the left side plate.

[0017] Furthermore, the climbing mechanism includes a pressure-bearing part and a crawling part; the left side of the pressure-bearing part contacts the lower surface of the annular expansion ring, and the right side of the pressure-bearing part is fixedly connected to the left side of the crawling part; the right side of the crawling part is slidably connected to the left side plate and can slide vertically up and down along the left side plate; the lower end of the lifting rope is fixedly connected to both the front and rear ends of the crawling part.

[0018] Furthermore, the pressure-bearing part includes a pressure-bearing upper plate, a pressure-bearing spring, a pressure-bearing base, a spring core cylinder, a guide column, and a limiting support plate;

[0019] The pressure-bearing upper plate and the pressure-bearing base are arranged parallel to each other vertically, and the upper surface of the pressure-bearing upper plate is in contact with the lower surface of the annular expansion ring; wherein, the pressure-bearing upper plate is horizontally arranged at the upper left side of the crawling part, and the pressure-bearing base is horizontally fixed at the lower left side of the crawling part;

[0020] The spring core is vertically fixed to the lower surface of the pressure-bearing upper plate, and the guide post is vertically fixed to the upper surface of the pressure-bearing base; wherein the spring core and the guide post are coaxially arranged, and the upper end of the guide post can be inserted into the lower end of the spring core; the pressure spring is vertically arranged between the pressure-bearing upper plate and the pressure-bearing base, and is concentrically sleeved on the outside of the spring core and the guide post; wherein the upper end of the pressure spring contacts the lower surface of the pressure-bearing upper plate, and the lower end of the pressure spring contacts the upper surface of the pressure-bearing base;

[0021] The limiting support plates are vertically symmetrically arranged on both sides of the pressure bearing spring; wherein, the lower end of the limiting support plate is fixedly connected to the upper surface of the pressure bearing base, and the upper end of the limiting support plate extends toward the lower surface of the pressure bearing plate; the right end of the limiting support plate is vertically fixedly connected to the left side of the crawling part.

[0022] Furthermore, the crawling part includes a frame and two wheel assemblies mounted on the frame, with the two wheel assemblies arranged vertically at intervals on the right side of the frame;

[0023] The frame is a U-shaped plate structure, including a frame plate body, a first end plate, and a second end plate. The frame plate body is vertically parallel to the left side plate and located to the left of the left side plate. The first end plate is vertically disposed at the front end of the left side plate, and its end is vertically fixed to the front end of the frame plate body. The second end plate is vertically disposed at the rear end of the left side plate, and its end is vertically fixed to the rear end of the frame plate body. The lower end of the lifting rope is fixedly connected to the outer middle of the first end plate on one side, and the lower end of the lifting rope is fixedly connected to the outer middle of the second end plate on the other side.

[0024] The wheel assembly includes two right-side wheels, two left-side wheels, two short axles, and a long axle; the two right-side wheels are symmetrically arranged on the right side of the left-side plate, wherein the first right-side wheel is mounted on the first end plate via one of the short axles, and the second right-side wheel is mounted on the second end plate via the other short axle.

[0025] The long shaft is horizontally arranged on the left side of the left side plate. One end of the long shaft is connected to the first end plate, and the other end of the long shaft is connected to the second end plate. Two left wheels are symmetrically arranged on the left side of the left side plate. The first left wheel is installed at one end of the long shaft, and the second left wheel is installed at the other end of the long shaft.

[0026] Furthermore, the horizontal distance between the right wheel and the left wheel matches the thickness of the left side plate.

[0027] Furthermore, the power mechanism is a manual hoist or an electric hoist; the lifting rope is a wire rope or a steel chain.

[0028] The present invention also provides a lifting method for steel storage tanks, utilizing the aforementioned lifting system for steel storage tanks;

[0029] The lifting method specifically includes the following steps:

[0030] Step 1: Determine the positioning circle of the lifting unit with the center of the bottom of the steel storage tank to be constructed as the center; evenly distribute several lifting units along the circumference of the positioning circle of the lifting unit; wherein the diameter of the positioning circle of the lifting unit is smaller than the inner diameter of the tank body of the steel storage tank to be constructed.

[0031] Step 2: Vertically fix the I-shaped pile to the bottom of the tank, and install the power mechanism and the crawling mechanism on the I-shaped pile; then connect the upper end of the lifting rope to the output end of the power mechanism, and connect the lower end of the lifting rope to the crawling mechanism;

[0032] Step 3: According to the engineering design requirements, complete the welding of the first ring of tank body and install an annular expansion ring on the inner wall of the first ring of tank body;

[0033] Step 4: Start the power mechanism to drive the crawling mechanism to move upward so that the crawling mechanisms in all lifting units contact the lower surface of the annular expansion ring;

[0034] Step 5: Continue to drive the crawling mechanism upward, pulling the entire tank body upward until the preset lifting height is reached, at which point the power mechanism stops;

[0035] Step 6: Under the lifted tank body, carry out the next round of tank body assembly welding according to the engineering design requirements;

[0036] Step 7: Restart the power mechanism to drive the crawling mechanism to move down until the lower end of the lifted tank body is connected to the upper end of the next ring of tank bodies. Then, carry out the welding construction of the upper and lower rings of tank bodies.

[0037] Step 8: Remove the annular expansion ring on the first ring of the tank body, and reinstall the annular expansion ring on the next ring of the tank body;

[0038] Step 9: Repeat steps 3-8 until all tank bodies in the steel storage tank to be constructed are welded and assembled.

[0039] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0040] This invention provides a lifting system and method for steel storage tanks. Several lifting units are evenly arranged along the inner circumference of the tank body. Both the power mechanism and the climbing mechanism are mounted on vertically positioned I-beams. The power mechanism uses lifting ropes to drive the climbing mechanism vertically up and down, thereby lifting the tank body and avoiding swaying caused by wind loads. By vertically sliding the climbing mechanism on the I-beams, the tank body is ensured to be evenly stressed in the circumferential direction, preventing circumferential deflection. Simultaneously, it prevents overall tilting of the tank body and damage to the lifting units. The device has a simple structure, is easy to operate, and is highly safe.

[0041] Furthermore, by setting a set of support mechanisms on the side and at both ends of the I-shaped pile, the stability of the I-shaped pile is effectively improved.

[0042] Furthermore, by setting a pressure spring in the climbing mechanism, the stress on the lifting unit can be directly obtained through the compression of the pressure spring; the friction between the pressure plate and the annular expansion ring can effectively transfer the wind load to the climbing mechanism, and then to the bottom of the tank through the I-shaped pile and the support mechanism, thus avoiding the shaking or deflection of the tank body. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the usage status of the lifting system described in this invention;

[0044] Figure 2 This is a front view of the lifting unit in this invention;

[0045] Figure 3 This is a top view of the lifting unit in this invention;

[0046] Figure 4 This is a left view of the lifting unit in this invention;

[0047] Figure 5 This is a front view of the climbing mechanism in this invention;

[0048] Figure 6 This is a top view of the climbing mechanism in this invention;

[0049] Figure 7 This is a left view of the climbing mechanism in this invention;

[0050] Figure 8 This is a front view of the I-shaped pile in this invention;

[0051] Figure 9 This is a top view of the I-shaped pile in this invention;

[0052] Figure 10 This is a left view of the I-shaped pile in this invention;

[0053] Figure 11 This is a front view of the support mechanism in this invention;

[0054] Figure 12 This is a top view of the support mechanism in this invention;

[0055] Figure 13 This is a left view of the support mechanism in this invention.

[0056] Among them, 1 is the tank wall panel, 2 is the annular expansion ring, 3 is the power mechanism, 4 is the lifting rope, 5 is the climbing mechanism, 6 is the I-shaped pile body, 7 is the support mechanism; 51 is the pressure-bearing upper plate, 52 is the pressure-bearing spring, 53 is the pressure-bearing base, 54 is the right wheel, 55 is the left wheel, 56 is the frame, 57 is the short axle, 58 is the long axle, 59 is the spring core cylinder, 510 is the guide column, 511 is the limiting support plate, 512 is the rib plate; 61 is the pile top plate, 62 is the left side plate, 63 is the middle vertical plate, 64 is the pile bottom plate, 65 is the right side plate, 66 is the first pin seat; 71 is the double fork rod, 72 is the second pin seat, 73 is the support base plate, 74 is the fourth pin shaft. Detailed Implementation

[0057] To make the technical problems solved by the present invention, the technical solutions, and the beneficial effects clearer, the following specific embodiments provide a further detailed description of the present invention. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of the invention.

[0058] This invention provides a lifting system for steel storage tanks, used to lift steel storage tanks under construction. The steel storage tank includes a tank top, several rings of tank body, and a tank bottom. The rings of tank body are welded together along their centerline. The tank top is located at the top of the uppermost ring of tank body, and the tank bottom is located at the bottom of the lowermost ring of tank body. Each tank body includes several tank wall plates 1 and annular expansion rings 2. The tank wall plates 1 are arc-shaped steel plate structures, and several tank wall plates 1 are welded together circumferentially to form the tank body. The annular expansion rings 2 are circular structures, concentrically arranged on the inner wall of the tank body 1, and located near the lower end of the tank body. The annular expansion rings 2 are formed by splicing several arc-shaped expansion ring segments. The outer arc end of the annular expansion ring 2 is fixed to the inner wall of the tank body 1, and the inner arc end of the annular expansion ring 2 extends horizontally towards the centerline of the tank body 1.

[0059] As attached Figure 1-13 As shown, the lifting system for the steel storage tank includes several lifting units; the lifting units are evenly distributed along the inner circumference of the tank body of the steel storage tank to be constructed; wherein, the lifting unit includes a power mechanism 3, a lifting rope 4, a climbing mechanism 5, an I-shaped pile body 6, and three sets of support mechanisms 7.

[0060] The I-shaped pile 6 is vertically arranged inside the tank body and close to the inner surface of the tank wall plate 1; the power mechanism 3 is located at the top of the I-shaped pile 6 and is used to output lifting power; the climbing mechanism 5 is vertically slidably arranged on the I-shaped pile 6 and close to one side of the tank wall plate 1; wherein, one side of the climbing mechanism 5 is vertically slidably connected to the I-shaped pile 6, and the other side of the climbing mechanism 5 is in contact with the annular expansion ring 2; the lifting rope 4 is vertically arranged between the power mechanism 3 and the climbing mechanism 5, and the upper end of the lifting rope 4 is connected to the output end of the power mechanism 3. The lower end of the lifting rope 4 is connected to the climbing mechanism 5; three sets of support mechanisms 7 are all inclinedly arranged between the I-shaped pile 6 and the bottom of the steel storage tank to be constructed; the upper end of the support mechanism 7 is connected to the upper end of the I-shaped pile 6, and the lower end of the support mechanism 7 is connected to the bottom of the steel storage tank to be constructed; wherein, the first set of support mechanisms is inclinedly arranged on the side of the I-shaped pile 6 and close to the center of the tank body; the second set of support mechanisms is inclinedly arranged at the front end of the I-shaped pile 6 and close to the previous lifting unit; the third set of support mechanisms is inclinedly arranged at the rear end of the I-shaped pile 6 and close to the next lifting unit.

[0061] The lifting system for steel storage tanks of the present invention comprises an I-shaped pile 6 vertically arranged inside the tank body, a power mechanism 3 located at the top of the I-shaped pile 6, and a climbing mechanism 5 vertically slidably mounted on the I-shaped pile 6. The power mechanism 3 outputs lifting power, which drives the climbing mechanism 5 to move vertically up and down along the I-shaped pile 6 via a lifting rope 4. Since the climbing mechanism 5 is in contact with the annular expansion ring 2, during the vertical up and down movement of the climbing mechanism 5, the annular expansion ring 2 drives the tank body to move vertically, thereby achieving the lifting and lowering of the tank body.

[0062] In this invention, the power mechanism 3 is a hand-operated hoist or an electric hoist; the lifting rope 4 is a wire rope or a steel chain.

[0063] In this invention, the I-shaped pile body 6 includes a pile top plate 61, a left side plate 62, a middle vertical plate 63, a pile bottom plate 64, a right side plate 65, and a first pin seat 66; the pile top plate 61, the left side plate 62, the middle vertical plate 63, the pile bottom plate 64, and the right side plate 65 are spliced ​​together to form a vertical arrangement in the I-shaped frame structure.

[0064] Specifically, the pile top plate 61 and the pile bottom plate 64 are arranged parallel to each other vertically and are also parallel to the bottom of the tank; wherein, the pile bottom plate 64 is horizontally fixed on the upper surface of the bottom of the tank, and the pile bottom plate 64 and the bottom of the tank are fixed together by bolts; the left side plate 62 and the right side plate 65 are arranged parallel to each other vertically and are both located between the pile top plate 61 and the pile bottom plate 64.

[0065] The left side plate 62 is disposed near the tank wall plate 1 and is radially perpendicular to the tank body. The upper end of the left side plate 62 is vertically fixed to the left end of the lower surface of the pile top plate 61, and the lower end of the left side plate 62 is vertically fixed to the left end of the upper surface of the pile bottom plate 64. The right side plate 65 is disposed near the center of the tank body and is radially perpendicular to the tank body. The upper end of the right side plate 65 is vertically fixed to the right end of the lower surface of the pile top plate 61, and the lower end of the right side plate 65 is vertically fixed to the right end of the upper surface of the pile bottom plate 64.

[0066] The intermediate upright plate 63 is vertically disposed between the left side plate 62 and the right side plate 65, and the intermediate upright plate 63 is disposed radially along the tank body; wherein, one end of the intermediate upright plate 63 is fixed perpendicularly to the vertical center line of the left side plate 62, and the other end of the intermediate upright plate 63 is fixed perpendicularly to the vertical center line of the right side plate 65.

[0067] The power mechanism 3 is fixedly mounted on the top plate 61 of the pile body and is located near the left side plate 62; the climbing mechanism 5 is vertically slidably mounted on the left side plate 62; the first pin seat 66 is fixedly mounted on the right side surface of the right side plate 65 and is located on the vertical center line of the right side plate 65; one side of the first pin seat 66 is fixedly connected to the right side plate 65, and the other side of the first pin seat 66 is provided with a first pin hole; the first pin hole is used to be fixedly connected to the upper end of the first set of support mechanisms through a first pin shaft; the top front end of the right side plate 65 is provided with a second pin hole, which is used to be fixedly connected to the upper end of the second set of support mechanisms through a second pin shaft; the top rear end of the right side plate 65 is provided with a third pin hole, which is used to be fixedly connected to the upper end of the third support mechanism through a third pin shaft.

[0068] In this invention, the crawling mechanism 5 includes a pressure-bearing part and a crawling part; the left side of the pressure-bearing part is in contact with the lower surface of the annular expansion ring 2, and the right side of the pressure-bearing part is fixedly connected to the left side of the crawling part; the right side of the crawling part is slidably connected to the left side plate 62 and can move vertically up and down along the left side plate 62; the lower end of the lifting rope 4 is fixedly connected to both the front and rear ends of the crawling part.

[0069] The pressure-bearing part includes a pressure-bearing upper plate 51, two spring assemblies, a pressure-bearing base 53, a limiting support plate 511, and a rib plate 512. The pressure-bearing upper plate 51 and the pressure-bearing base 53 are arranged parallel to each other vertically. The pressure-bearing upper plate 51 is horizontally arranged at the upper left side of the crawling part, and the pressure-bearing base 53 is horizontally fixed at the lower left side of the crawling part. The pressure-bearing upper plate 51 is located below the annular expansion ring 2, and the upper surface of the pressure-bearing upper plate 51 is in contact with the lower surface of the annular expansion ring 2. The two spring assemblies are vertically symmetrically arranged between the pressure-bearing upper plate 51 and the pressure-bearing base 53, and the axis of symmetry of the two spring assemblies coincides with the radial direction of the tank body. The upper end of the spring assembly is in contact with the middle of the lower surface of the pressure-bearing upper plate 51, and the lower end of the spring assembly is in contact with the middle of the upper surface of the pressure-bearing base 53.

[0070] The spring assembly includes a pressure spring 52, a spring core 59, and a guide post 510. The spring core 59 is vertically fixed to the lower surface of the upper pressure plate 51, and the guide post 510 is vertically fixed to the upper surface of the pressure base 53. The spring core 59 and the guide post 510 are coaxially arranged, and the upper end of the guide post 510 can be inserted into the lower end of the spring core 59. The pressure spring 52 is vertically arranged between the upper pressure plate 51 and the pressure base 53, and is concentrically sleeved on the outside of the spring core 59 and the guide post 510. The upper end of the pressure spring 52 is sleeved on the outside of the spring core 59, the upper end of the pressure spring 52 is in contact with the lower surface of the upper pressure plate 51, the lower end of the pressure spring 52 is sleeved on the outside of the guide post 510, and the lower end of the pressure spring 52 is in contact with the upper surface of the pressure base 53.

[0071] The limiting support plate 511 is vertically symmetrically arranged on the outside of the two sets of spring assemblies and positioned between the pressure-bearing upper plate 51 and the pressure-bearing base 53; wherein, the lower end of the limiting support plate 511 is fixedly connected to the upper surface of the pressure-bearing base 53, and the upper end of the limiting support plate 511 extends toward the lower surface of the pressure-bearing upper plate 51; the right end of the limiting support plate 511 is vertically fixedly connected to the left side of the crawling part; the rib plate 512 is vertically symmetrically arranged below the lower surface of the pressure-bearing base 53 and is located in the same vertical plane as the limiting support plate 511; wherein, the upper end of the rib plate 512 is vertically fixedly connected to the lower surface of the pressure-bearing base 53, and the right end of the rib plate 512 is vertically fixed to the lower end of the left side surface of the crawling part.

[0072] The crawling part includes a frame 56 and two wheel assemblies mounted on the frame 56, with the two wheel assemblies spaced vertically on the right side of the frame 56. The frame 56 is a U-shaped plate structure, including a frame plate body, a first end plate, and a second end plate. The frame plate body is vertically parallel to the left side plate 62 and located to the left of the left side plate 62. The pressure-bearing upper plate 51 is horizontally positioned at the upper left side of the frame plate body, the pressure-bearing base 53 is horizontally fixed at the lower left side of the frame plate body, and the right end of the limiting support plate 511 is vertically fixed to the left side of the frame plate body. The rib plate 512 is vertically positioned between the lower surface of the pressure-bearing base 53 and the lower left side of the frame plate body, and the right end of the rib plate 512 is vertically fixed to the lower left side of the frame plate body. The axes of symmetry of the two spring assemblies, the limiting support plate 511, and the rib plate 512 all coincide with the vertical centerline of the frame plate body.

[0073] The first end plate and the second end plate are arranged vertically parallel to each other and symmetrically on the right side of the frame plate body; wherein, the axis of symmetry of the first end plate and the second end plate coincides with the vertical center line of the frame plate body; specifically, the left end plate 62 is vertically arranged between the first end plate and the second end plate; the first end plate is vertically arranged at the front end of the left end plate 62, one end of the first end plate is vertically fixedly connected to the front end of the frame plate body, and the other end of the first end plate extends toward the right end plate 65; the second end plate is vertically arranged at the rear end of the left end plate 62, one end of the second end plate is vertically fixedly connected to the rear end of the frame plate body, and the other end of the second end plate extends toward the right end plate 65; one side of the lower end of the lifting rope 4 is fixedly connected to the middle of the outer side of the first end plate, and the other side of the lower end of the lifting rope 4 is fixedly connected to the middle of the outer side of the second end plate.

[0074] The wheel assembly includes two right-side wheels 54, two left-side wheels 55, two short axles 57, and a long axle 58. The two right-side wheels 54 are symmetrically arranged on the right side of the left-side plate 62, wherein the first right-side wheel is mounted on the first end plate via one of the short axles 57, and the second right-side wheel is mounted on the second end plate via the other short axle 57. The long axle 58 is horizontally arranged on the left side of the left-side plate 62, one end of which is vertically fixedly connected to the first end plate, and the other end of which is vertically fixedly connected to the second end plate. The two left-side wheels 55 are symmetrically arranged on the left side of the left-side plate 62, with the first left-side wheel mounted on one end of the long axle 58 and the second left-side wheel mounted on the other end of the long axle 58. The right side of the left-side wheel 55 is in sliding contact with the left side surface of the left-side plate 62, and the left side of the right-side wheel 54 is in sliding contact with the right side surface of the left-side plate 62. The horizontal distance between the right-side wheel 54 and the left-side wheel 55 matches the thickness of the left-side plate 62.

[0075] In this invention, the support mechanism 7 includes a double-fork rod 71, a second pin seat 72, a support base plate 73, and a fourth pin shaft 74. The double-fork rod 71 is inclined, and the support base plate 73 is horizontally fixed to the upper surface of the tank bottom. The support base plate 73 is fixedly connected to the tank bottom by bolts. The upper end of the double-fork rod 71 is connected to the upper end of the I-shaped pile body 6, and the lower end of the double-fork rod 71 is connected to the support base plate 73 through the second pin seat 72. The second pin seat 72 is fixed to the center of the upper surface of the support base plate 73. The upper end of the second pin seat 72 has a fourth pin hole, and the lower end of the double-fork rod 71 has a lower pin hole. The fourth pin hole and the lower pin hole communicate with each other. The double-fork rods 71 ​​are connected together via a fourth pin 74; the upper end of the double-fork rod 71 is provided with an upper pin hole; wherein, in the first set of support mechanisms, the upper pin hole of the double-fork rod is connected to the first pin hole via a first pin to connect the double-fork rod in the first set of support mechanisms to the first pin seat 66; in the second set of support mechanisms, the upper pin hole of the double-fork rod is connected to the second pin hole via a second pin to connect the double-fork rod in the second set of support mechanisms to the top front end of the right side plate 65; in the third set of support mechanisms, the upper pin hole of the double-fork rod is connected to the third pin hole via a third pin to connect the double-fork rod in the third set of support mechanisms to the top rear end of the right side plate 65.

[0076] Working principle and improvement methods:

[0077] The lifting system for steel storage tanks described in this invention includes the following steps when in use:

[0078] Step 1: Determine the positioning circle of the lifting unit with the center of the bottom of the steel storage tank to be constructed as the center; evenly arrange several lifting units along the circumference of the positioning circle of the lifting unit; wherein the diameter of the positioning circle of the lifting unit is smaller than the inner diameter of the tank body of the steel storage tank to be constructed.

[0079] Step 2: At the location where the lifting unit is installed, the I-shaped pile 6 is vertically fixed to the bottom of the tank with bolts. The support mechanism is connected to the I-shaped pile with pins. The power mechanism 3 and the crawling mechanism 5 are both installed on the I-shaped pile 6. Then, the upper end of the lifting rope 4 is connected to the output end of the power mechanism 3, and the lower end of the lifting rope 4 is connected to the crawling mechanism 5.

[0080] Step 3: According to the engineering design requirements, complete the assembly and welding of the first ring of the tank body, and install the annular expansion ring 2 on the inner wall of the first ring of the tank body.

[0081] Step 4: Start the power mechanism 3 to drive the crawling mechanism 5 to move upward so that the crawling mechanism 5 in all lifting units contacts the lower surface of the annular expansion ring 2; and cause the pressure spring in the crawling mechanism 5 to generate a preset deformation; adjust all lifting units so that the preset deformation of the pressure spring in each lifting unit is the same.

[0082] Step 5: Continue to drive the crawling mechanism 5 upward, pulling the entire tank body upward until the preset lifting height is reached, at which point the power mechanism 3 stops.

[0083] Step 6: Under the hoisted tank body, carry out the next round of tank body assembly welding construction according to the engineering design requirements.

[0084] Step 7: Restart the power mechanism 3 to drive the crawling mechanism 5 to move down until the lower end of the hoisted tank body connects with the upper end of the next ring of tank bodies. Then, carry out the welding construction of the upper and lower rings of tank bodies.

[0085] Step 8: Remove the annular expansion ring on the first ring of the tank body, and reinstall the annular expansion ring on the next ring of the tank body.

[0086] Step 9: Repeat steps 3-8 until all tank bodies in the steel storage tank to be constructed are welded and assembled.

[0087] The lifting system and method of this invention utilizes a plurality of lifting units evenly distributed along the circumference within the tank body. Each lifting unit employs a climbing mechanism that travels on the surface of an I-shaped pile to lift the tank body, thus addressing the problems of swaying of the assembled tank body under wind load and circumferential deflection during lifting. Furthermore, by incorporating a pressure spring within the climbing mechanism, with its upper end fitted onto the outside of the spring core and its lower end fitted onto the outside of the guide column, the compression of the pressure spring is used to determine the stress on the lifting equipment.

[0088] In this invention, the top of the I-shaped pile is provided with a pile top plate for fixing an electric hoist or a manual hoist; the bottom of the I-shaped pile is provided with a pile bottom plate for fixing the I-shaped pile to the bottom of the tank with bolts; the top of the right side plate of the I-shaped pile has two pin holes, and a first pin seat is fixed to the upper side of the right side plate, and the first pin seat has a pin hole; the pin hole is used to connect to the upper end of the double fork rod through a pin shaft; the lower end of the double fork rod is connected to the second pin seat through a pin shaft, and the second pin seat is fixed to the bottom of the tank with bolts; three sets of support mechanisms are connected to the I-shaped pile to form a stable structure; the left side plate of the I-shaped pile is used to install a climbing mechanism, which uses a lifting rope to move vertically up and down along the surface of the left side plate under the drive of an electric hoist or a manual hoist.

[0089] The climbing mechanism has two wheel assemblies arranged vertically in its climbing section. Each wheel assembly includes two left wheels and two right wheels. A horizontal gap exists between the left and right wheels, equal to the thickness of the left side plate. The left and right wheels can move vertically along the left side plate. The pressure-bearing section of the climbing mechanism includes a pressure-bearing upper plate, a spring assembly, and a pressure-bearing base. When the climbing mechanism lifts the annular expansion ring and the tank body via the pressure-bearing upper plate, the pressure spring is compressed. The amount of compression indicates the stress on the lifting unit. When the assembled tank body is lifted and subjected to wind load, the friction between the pressure-bearing upper plate and the annular expansion ring transfers the wind load to the climbing mechanism. The climbing mechanism then transfers the load to the I-beam pile via the wheels. The I-beam pile, through a support mechanism connecting its bottom plate and right side plate, transfers the wind load to the bottom of the tank, thus achieving load transfer and preventing swaying and circumferential deflection during lifting under wind load.

[0090] Examples of steel storage tank manufacturing:

[0091] In this example, the lifting process of a steel storage tank with a diameter of 20,000 mm is taken as an example. The specific construction process is as follows:

[0092] Step 1: Lay the bottom of the steel storage tank to be constructed on the ground. Determine the positioning circle of the lifting unit with the center of the bottom of the tank as the center. Distribute a lifting unit at 18° intervals along the circumference of the positioning circle of the lifting unit. There are a total of 20 lifting units evenly distributed.

[0093] Step 2: Fix the bottom plate of the I-shaped pile to the bottom of the tank with bolts.

[0094] Step 3: Install the climbing mechanism onto the left side plate of the I-beam pile, so that the left side plate is located between the right wheel and the left wheel.

[0095] Step 4: Use pins to install the double fork rods of the three sets of support mechanisms onto the right side plate of the I-shaped pile.

[0096] Step 5: Fix the support base plate of the support mechanism to the bottom of the tank with bolts so that the I-shaped pile has auxiliary support in all directions.

[0097] Step 6: Use bolts to fix the top plate of the I-shaped pile to the left side plate, the middle vertical plate, and the right side plate.

[0098] Step 7: Fix the power mechanism to the top plate of the I-shaped pile.

[0099] Step 8: Connect the power mechanism and the climbing mechanism with the lifting rope, and place the climbing mechanism in the lowest position, that is, close to the bottom plate of the I-shaped pile. At this point, a complete lifting unit is installed. Repeat steps 2 to 8 to install the remaining lifting units.

[0100] Step 9: Assemble and weld the first ring of the tank body according to the engineering design requirements, and install the annular expansion ring on the inner wall of the bottom of the tank body.

[0101] Step 10: Drive the power mechanism of each lifting unit. The power mechanism pulls the climbing mechanism through the lifting rope, so that the pressure plate of each climbing mechanism contacts the bottom surface of the annular expansion ring.

[0102] Step 11: Continue pulling the climbing mechanism to raise the first ring of the tank body and the annular expansion ring to a lower height. The pressure spring on the spring core cylinder will produce a certain deformation in the direction of the guide column and the spring core cylinder. Check the deformation of the pressure spring of the climbing mechanism in each lifting unit. If they are not equal, adjust them individually to be the same.

[0103] Step 12: Continue to pull the climbing mechanism to raise the first ring of the tank body and the annular expansion ring to the required height. Readjust the deformation of the pressure springs to be the same to ensure that the force on each lifting unit is the same after the tank body is lifted.

[0104] Step 13: On the work station below the hoisted tank body to assemble and weld the next section of the tank body according to the engineering design requirements;

[0105] Step 14: Slowly drive the climbing mechanism to descend, lowering the hoisted tank body onto the lower tank body. Continue driving the climbing mechanism to descend until the pressure plate and the bottom surface of the annular expansion ring are no longer in contact, allowing the pressure spring to return to its original state. Weld the two tank body sections according to the engineering design requirements.

[0106] Step 15: Remove the annular expansion ring from the upper tank body and place the removed annular expansion ring on the pressure plate of the climbing mechanism. As the climbing mechanism descends to the bottom of the lower tank body, reinstall the annular expansion ring.

[0107] Step 16: As the number of tank body welds increases, it is necessary to replace the pressure springs with ones with greater stiffness to ensure that the pressure plate of the climbing mechanism does not come into contact with the limit support plate.

[0108] Step 17: Repeat steps 10-16 to complete the lifting and assembly of each tank ring; at this point, the steel storage tank processing is complete.

[0109] The lifting system and method for steel storage tanks described in this invention employs a plurality of lifting units evenly distributed along the circumference within the tank body. Each lifting unit includes a power mechanism, a lifting rope, a climbing mechanism, an I-shaped pile, and three sets of support mechanisms. The three sets of support mechanisms are connected to the I-shaped pile to form a stable pile structure. The power mechanism is installed on top of the I-shaped pile, and the climbing mechanism is vertically slidably mounted on the I-shaped pile. The lifting rope connects the power mechanism to the climbing mechanism. The lifting power output from the power mechanism drives the climbing mechanism to move vertically up and down along the left side plate of the I-shaped pile, thereby lifting or lowering the assembled tank body. This avoids swaying of the tank body under wind loads, circumferential deflection during lifting, and uneven force on the lifting units in the vertical direction. The lifting units are fixed to the tank bottom by bolts. The overall structure is simple, easy to operate, safe, reliable, and reusable.

[0110] The above embodiments are merely one of the implementation methods for achieving the technical solution of the present invention. The scope of protection claimed by the present invention is not limited to this embodiment, but also includes any variations, substitutions and other implementation methods that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention.

Claims

1. A lifting system for a steel storage tank, characterized in that, The application relates to a steel storage tank construction device, which comprises a plurality of lifting units; the lifting units are uniformly distributed along the inner circumferential surface of a tank cylinder of a steel storage tank to be constructed; the tank cylinder is welded by a plurality of storage tank wall plates (1); and the inner circumferential surface of the tank cylinder is provided with an annular expansion ring (2); The lifting unit comprises a power mechanism (3), a hoisting rope (4), a climbing mechanism (5) and a I-shaped pile body (6); The I-shaped pile body (6) is vertically arranged on the inner side of the tank cylinder and is arranged close to the inner surface of the storage tank wall plate (1); and the power mechanism (3) is arranged at the top end of the I-shaped pile body (6); The climbing mechanism (5) is vertically slidably arranged on the I-shaped pile body (6) and is arranged close to one side of the storage tank wall plate (1); one side of the climbing mechanism (5) is vertically slidably connected with the I-shaped pile body (6), the other side of the climbing mechanism (5) is in contact with the annular expansion ring (2); the upper end of the hoisting rope (4) is connected with the output end of the power mechanism (3), and the lower end of the hoisting rope (4) is connected with the climbing mechanism (5); The climbing mechanism (5) comprises a pressure bearing part and a crawling part; the left side of the pressure bearing part is in contact with the lower surface of the annular expansion ring (2), and the right side of the pressure bearing part is fixedly connected with the left side of the crawling part; the right side of the crawling part is slidably connected with the left side plate (62) and can vertically slide up and down along the left side plate (62); and the lower end of the hoisting rope (4) is fixedly connected with the front and rear ends of the crawling part; The pressure bearing part comprises a pressure bearing upper plate (51), a pressure bearing spring (52), a pressure bearing base (53), a spring core cylinder (59), a guide column (510) and a limiting support plate (511); The pressure bearing upper plate (51) and the pressure bearing base (53) are arranged in parallel on the upper and lower surfaces; the upper surface of the pressure bearing upper plate (51) is in contact with the lower surface of the annular expansion ring (2); the pressure bearing upper plate (51) is horizontally arranged at the left upper end of the crawling part, and the pressure bearing base (53) is horizontally fixed at the left lower end of the crawling part; The spring core cylinder (59) is vertically fixed on the lower surface of the pressure bearing upper plate (51), and the guide column (510) is vertically fixed on the upper surface of the pressure bearing base (53); the spring core cylinder (59) and the guide column (510) are coaxially arranged, and the upper end of the guide column (510) can be inserted into the lower end of the spring core cylinder (59); the pressure bearing spring (52) is vertically arranged between the pressure bearing upper plate (51) and the pressure bearing base (53) and is concentrically arranged outside the spring core cylinder (59) and the guide column (510); the upper end of the pressure bearing spring (52) is in contact with the lower surface of the pressure bearing upper plate (51), and the lower end of the pressure bearing spring (52) is in contact with the upper surface of the pressure bearing base (53); The limiting support plate (511) is vertically symmetrically arranged on both sides of the pressure bearing spring (52); wherein the lower end of the limiting support plate (511) is fixedly connected with the upper surface of the pressure bearing base (53), and the upper end of the limiting support plate (511) extends towards the side of the lower surface of the pressure bearing upper plate (51); the right end of the limiting support plate (511) is fixedly connected with the left side of the crawling part perpendicularly; The crawling part comprises a frame (56) and two wheel assemblies mounted on the frame (56), and the two wheel assemblies are arranged on the right side of the frame (56) in an up-down interval; The frame (56) is a U-shaped plate structure, comprising a frame plate body, a first end plate and a second end plate; the frame plate body is vertically arranged in parallel with the left side plate (62) and located on the left side of the left side plate (62); the first end plate is vertically arranged at the front end of the left side plate (62), and the end of the first end plate is fixedly connected with the front end of the frame plate body perpendicularly; the second end plate is vertically arranged at the rear end of the left side plate (62), and the end of the second end plate is fixedly connected with the rear end of the frame plate body perpendicularly; wherein the lower end of the hoisting rope (4) is fixedly connected with the outer middle part of the first end plate, and the other lower end of the hoisting rope (4) is fixedly connected with the outer middle part of the second end plate; The wheel assembly comprises two right side wheels (54), two left side wheels (55), two short shafts (57) and a long shaft (58); the two right side wheels (54) are symmetrically arranged on the right side of the left side plate (62), wherein the first right side wheel is mounted on the first end plate through one of the short shafts (57), and the second right side wheel is mounted on the second end plate through the other short shaft (57); The long shaft (58) is horizontally arranged on the left side of the left side plate (62), one end of the long shaft (58) is connected with the first end plate, and the other end of the long shaft (58) is connected with the second end plate; the two left side wheels (55) are symmetrically arranged on the left side of the left side plate (62); wherein the first left side wheel is mounted on one end of the long shaft (58), and the second left side wheel is mounted on the other end of the long shaft (58).

2. A lifting system for a steel storage tank according to claim 1, characterized in that, It also comprises three sets of support mechanisms (7); the three sets of support mechanisms (7) are all arranged obliquely between the I-shaped pile body (6) and the tank bottom of the steel storage tank to be constructed; the upper end of the support mechanism (7) is connected with the upper end of the I-shaped pile body (6), and the lower end of the support mechanism (7) is connected with the tank bottom of the steel storage tank to be constructed; Among them, the first set of support mechanisms is obliquely arranged on the side of the I-shaped pile body (6) and close to the center side of the tank cylinder; the second set of support mechanisms is obliquely arranged at the front end of the I-shaped pile body (6) and close to the side of the previous lifting unit; the third set of support mechanisms is obliquely arranged at the rear end of the I-shaped pile body (6) and close to the side of the next lifting unit.

3. A lifting system for a steel storage tank according to claim 2, characterized in that The support mechanism (7) comprises a double fork head rod (71) and a support bottom plate (73); the double fork head rod (71) is arranged obliquely, and the support bottom plate (73) is horizontally fixed on the upper surface of the tank bottom; wherein the upper end of the double fork head rod (71) is connected with the upper end of the I-shaped pile body (6), and the lower end of the double fork head rod (71) is connected with the support bottom plate (73); wherein the double fork head rod (71) and the I-shaped pile body (6) and the double fork head rod (71) and the support bottom plate (73) are connected by pin shafts.

4. A lifting system for a steel storage tank as defined in claim 1, wherein The I-shaped pile body (6) comprises a pile body top plate (61), a left side plate (62), an intermediate vertical plate (63), a pile body bottom plate (64) and a right side plate (65); The pile body top plate (61) and the pile body bottom plate (64) are arranged in parallel vertically, and the pile body bottom plate (64) is horizontally fixed on the upper surface of the tank bottom of the steel storage tank to be constructed; the left side plate (62) and the right side plate (65) are arranged in parallel vertically between the pile body top plate (61) and the pile body bottom plate (64); wherein the left side plate (62) is arranged close to the inner surface of the wall plate (1) of the storage tank, and the right side plate (65) is arranged close to the center of the tank cylinder; The intermediate vertical plate (63) is arranged vertically between the left side plate (62) and the right side plate (65), and the intermediate vertical plate (63) is arranged along the radial direction of the tank cylinder; wherein one end of the intermediate vertical plate (63) is fixed perpendicularly to the vertical center line of the left side plate (62), and the other end of the intermediate vertical plate (63) is fixed perpendicularly to the vertical center line of the right side plate (65); The power mechanism (3) is fixedly arranged on the pile body top plate (61) and arranged close to one side of the left side plate (62); and the climbing mechanism (5) is vertically slidably arranged on the left side plate (62).

5. A lifting system for a steel storage tank as defined in claim 1, wherein The horizontal distance between the right side wheel (54) and the left side wheel (55) matches the thickness of the left side plate (62).

6. A lifting system for a steel storage tank as defined in claim 1, wherein The power mechanism (3) adopts a hand-operated hoist or an electric hoist; and the hoisting rope (4) adopts a steel wire rope or a steel chain.

7. A method for lifting a steel tank, characterized in that, The lifting system for the steel storage tank according to any one of claims 1-6 is used; The lifting method comprises the following steps: Step 1: taking the center of the tank bottom of the steel storage tank to be constructed as the center, determining a lifting unit positioning circle, and evenly arranging a plurality of lifting units along the circumference of the lifting unit positioning circle; wherein the diameter of the lifting unit positioning circle is smaller than the inner diameter of the tank cylinder of the steel storage tank to be constructed; Step 2: vertically fixing the I-shaped pile body (6) on the tank bottom, and installing the power mechanism (3) and the climbing mechanism (5) on the I-shaped pile body (6); then connecting the upper end of the hoisting rope (4) with the output end of the power mechanism (3), and connecting the lower end of the hoisting rope (4) with the climbing mechanism (5); Step 3: completing the assembly and welding construction of the first circle of tank cylinder according to the engineering design requirements, and installing an annular expansion ring (2) on the inner wall of the first circle of tank cylinder. Step 4, start the power mechanism (3) to drive the climbing mechanism (5) to move upward, so that the climbing mechanism (5) in all lifting units is in contact with the lower surface of the annular expansion ring (2); Step 5, continue to drive the climbing mechanism (5) to move upward, pull the whole-circle tank cylinder upward until the preset lifting height, at this time the power mechanism (3) stops; Step 6, below the lifted tank cylinder, carry out the next circle tank cylinder assembly welding construction according to the engineering design requirements; Step 7, start the power mechanism (3) again to drive the climbing mechanism (5) to move downward until the lower end of the lifted tank cylinder is connected with the upper end of the next circle tank cylinder, then carry out the assembly welding construction of the upper and lower two circle tank cylinders; Step 8, remove the annular expansion ring on the first circle tank cylinder and reinstall the annular expansion ring on the next circle tank cylinder; Step 9, repeat the operations of steps 3-8 until all the tank cylinders in the steel storage tank to be constructed are welded and assembled.

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