Reinforced outer cylinder in LNG (Liquefied Natural Gas) storage tank and positioning tool for outer cylinder
By rolling with thinner sheets and strengthening the outer cylinder design of the ring reinforcement ribs, the problems of large weight and insufficient compressive stability of the outer cylinder of the LNG storage tank are solved, and the effects of weight reduction and compression improvement are achieved.
Patent Information
- Application Number
- CN202421849713.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-01
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-08-01
AI Technical Summary
The outer cylinder of the LNG storage tank has a large weight, which affects the weight reduction and speed-up effect of commercial vehicles, and the existing outer cylinders have insufficient compressive stability.
The reinforced outer cylinder is rolled with a wall thickness of 2mm to 2.5mm, and the reinforcement rings and reinforcement ribs are welded at equal intervals on the inner wall of the cylinder. The positioning tool is used to improve the installation accuracy of the reinforcement rings and outer cylinders.
While reducing the weight of the outer cylinder, the compressive stability of the outer cylinder is improved, ensuring the weight reduction and speed-up effect of commercial vehicles, and preventing insufficient compressive strength caused by inclined welding of the reinforcement ring.
Smart Images
Figure CN222957834U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of pressure vessels, in particular to a reinforced outer cylinder in an LNG storage tank and a positioning tooling for the outer cylinder. Background Technique
[0002] An LNG storage tank is generally composed of an outer cylinder and an inner cylinder. Since the outer cylinder mainly plays a role of support and protection, currently, it is generally made of a 4-mm-thick steel plate rolled and welded. This will bring a problem, that is, the weight of the entire outer cylinder will be relatively heavy. And today, with the increasingly fierce market competition, it is necessary to reduce the weight and increase the speed of commercial vehicles to improve competitiveness. However, the heavy outer cylinder will affect the weight reduction and speed increase effect of commercial vehicles. In order to reduce the overall weight of the LNG storage tank, it is necessary to transform the outer cylinder. Content of the Utility Model
[0003] The purpose of the utility model is to provide a reinforced outer cylinder in an LNG storage tank and a positioning tooling for the outer cylinder. The reinforced outer cylinder is rolled out by a thinner plate and fixed with reinforcing rings, so that the outer cylinder can ensure strong compressive stability while being lightweight. In order to improve the installation accuracy between the reinforcing ring and the outer cylinder, it is necessary to use the positioning tooling to position the reinforcing ring and then weld it.
[0004] To achieve the above purpose, the technical solution adopted by the utility model is: a reinforced outer cylinder in an LNG storage tank, including: a cylinder body with a wall thickness of 2 mm to 2.5 mm, and a number of reinforcing rings are welded at equal intervals on the inner wall of the cylinder body. A number of reinforcing ribs are welded circumferentially between every two adjacent reinforcing rings, and both ends of the reinforcing ribs are welded to the two reinforcing rings respectively.
[0005] Further, for the aforementioned reinforced outer cylinder in an LNG storage tank, wherein, the reinforcing ring is rolled from any one of C-shaped steel, round steel or angle steel with a wall thickness of 1 mm to 1.5 mm, and the reinforcing ribs are made of the same thickness and type of steel as the reinforcing ring.
[0006] Further, for the aforementioned reinforced outer cylinder in an LNG storage tank, wherein, three reinforcing ribs are evenly distributed circumferentially between every two adjacent reinforcing rings, and every two adjacent rings of reinforcing ribs are arranged in a staggered manner.
[0007] A positioning tooling for the reinforced outer cylinder in an LNG storage tank, comprising: a transfer table, on which a positioning frame is provided, a lead screw is vertically rotatably arranged at the center position of the positioning frame, the lead screw is connected to a driving mechanism, a lead screw seat is threadedly connected to the lead screw, a balance plate is provided on the lead screw seat, the lead screw seat is located at the center position of the balance plate, two guide rods are symmetrically arranged around the lead screw in the positioning frame, two linear bearings are provided on the balance plate, and the two linear bearings are respectively slidably clamped on the two guide rods, a ring plate is fixedly provided on the balance plate, a plurality of air cylinders are circumferentially and evenly distributed on the ring plate, and a positioning block is provided on the piston rod of the air cylinder.
[0008] Further, for the positioning tooling for the reinforced outer cylinder in the LNG storage tank described above, four universal wheels are evenly distributed at the bottom of the transfer table.
[0009] Further, for the positioning tooling for the reinforced outer cylinder in the LNG storage tank described above, three air cylinders are circumferentially and evenly distributed on the ring plate, one of the air cylinders is located at the center line of the transfer table, and the other two air cylinders are symmetrically arranged left and right with respect to the center line of the transfer table.
[0010] Further, for the positioning tooling for the reinforced outer cylinder in the LNG storage tank described above, the driving mechanism includes: a reduction motor and a commutator, both the reduction motor and the commutator are arranged at the left and right center positions of the transfer table, the reduction motor is connected to the input shaft of the commutator, and the output shaft of the commutator is connected to the lead screw.
[0011] Further, for the positioning tooling for the reinforced outer cylinder in the LNG storage tank described above, a soft rubber pad is provided at the end of the positioning block.
[0012] The advantages of the present utility model are as follows: After replacing the original plate with a wall thickness of 4 mm with a plate with a wall thickness of 2 mm to 2.5 mm, the weight of the outer cylinder can be reduced, and strengthening rings and reinforcing ribs are provided on the inner wall of the outer cylinder to provide additional supporting force, so that good compressive stability of the outer cylinder can be ensured while reducing the weight of the outer cylinder. After using the positioning tooling, it is convenient to vertically weld the strengthening ring on the inner wall of the outer cylinder, preventing the situation of insufficient compressive strength caused by the inclined welding of the strengthening ring on the outer cylinder. Description of the Drawings
[0013] Figure 1 is a cross-sectional structural schematic diagram of the reinforced outer cylinder in the LNG storage tank described in the present utility model.
[0014] Figure 2 is a cross-sectional structural schematic diagram of the reinforced outer cylinder in the LNG storage tank described in the present utility model in another direction.
[0015] Figure 3 is a structural schematic diagram of the positioning tooling for the outer cylinder described in the present utility model.
[0016] Figure 4 is Figure 3 a schematic cross-sectional structure diagram in
[0017] Figure 5 a schematic structure diagram when the positioning tooling for the outer cylinder is in a positioned state after entering the outer cylinder. Specific implementation manners
[0018] The technical solution of the present utility model will be further described below in conjunction with the accompanying drawings and preferred embodiments.
[0019] As Figure 1 、 Figure 2 shown, the reinforced outer cylinder in the LNG storage tank of the present utility model includes: a cylinder body 1 with a wall thickness of 2 mm to 2.5 mm. The cylinder body 1 rolled from a plate with a thickness of 2 mm to 2.5 mm can effectively reduce the weight of the cylinder body 1. A number of reinforcing rings 11 are welded at equal intervals on the inner wall of the cylinder body 1. A number of reinforcing ribs 12 are welded circumferentially between every two adjacent reinforcing rings 11. Both ends of the reinforcing ribs 12 are respectively welded to the two reinforcing rings 11. The reinforcing rings 11 and the reinforcing ribs 12 can provide additional supporting force, so that the cylinder body 1 can still have good compressive stability while reducing the weight of the cylinder body 1. The reinforcing ring 11 is rolled from any one of C-shaped steel, round steel or angle steel with a wall thickness of 1 mm to 1.5 mm, and the reinforcing rib 12 is made of the same thickness and type of steel as the reinforcing ring 11.
[0020] In this embodiment, three reinforcing ribs 12 are evenly distributed circumferentially between every two adjacent reinforcing rings 11, and every two adjacent rings of reinforcing ribs 12 are arranged in a staggered manner. By the staggered arrangement, a more complex and uniform supporting structure can be formed on the inner wall of the cylinder body 1. Compared with the aligned arrangement, the staggered arrangement can more effectively transfer and disperse the load, and further enhance the stability of the cylinder body 1.
[0021] As Figure 3 、 Figure 4As shown in the figure, a positioning tooling for the reinforced outer cylinder in an LNG storage tank includes: a transfer table 2, on which a positioning frame 21 is provided. At the central position of the positioning frame 21, a lead screw 22 is vertically rotatably arranged. The lead screw 22 is connected to a driving mechanism. The driving mechanism includes: a reduction motor 3 and a commutator 31. Both the reduction motor 3 and the commutator 31 are arranged at the left and right central positions of the transfer table 2. The reduction motor 3 is connected to the input shaft of the commutator 31, and the output shaft of the commutator 31 is connected to the lead screw 22. A lead screw seat 221 is threadedly connected to the lead screw 22. A balance plate 4 is provided on the lead screw seat 221. The lead screw seat 221 is located at the central position of the balance plate 4. Two guide rods 23 are symmetrically arranged around the lead screw 22 in the positioning frame 21. Two linear bearings 41 are provided on the balance plate 4, and the two linear bearings 41 are respectively slidably clamped on the two guide rods 23. A ring plate 42 is fixedly provided on the balance plate 4. Three cylinders 5 are evenly distributed in a circle on the ring plate 42. One of the cylinders 5 is located on the center line of the transfer table 2, and the other two cylinders 5 are symmetrically arranged left and right with respect to the center line of the transfer table 2. Such a setting can ensure the left and right balance of the transfer table 2. A positioning block 51 is provided on the piston rod of the cylinder 5, and a soft rubber pad is provided at the end of the positioning block 51. Four universal wheels 24 are evenly distributed at the bottom of the transfer table 2. The two universal wheels 24 on the left and the two universal wheels 24 on the right are symmetrically arranged left and right with respect to the center line of the transfer table 2.
[0022] As Figure 5 As shown in the figure, when it is necessary to weld a reinforcing ring 11 in the cylinder body 1, the transfer table 2 is pushed into the cylinder body 1. When the transfer table 2 reaches the specified position, since the universal wheels 24 on the left and right sides of the transfer table 2 are symmetrically arranged, and the positioning frame 21, the balance plate 4, the ring plate 42 and the cylinders 5 are all symmetrically arranged left and right, when the transfer table 2 is located in the cylinder body 1, the transfer table 2 will automatically level left and right to ensure that the center line of the transfer table 2 is longitudinally aligned and parallel to the axis of the cylinder body 1. In this way, it can be ensured that the meridians of the ring plate 42 are parallel to the meridians of the cylinder body 1. Then, the lead screw 22 is driven to rotate by the reduction motor 3 and the commutator 31. The lead screw 22 drives the lead screw seat 221 to drive the balance plate 3 and the ring plate 42 to rise and fall, so that the distances between the three cylinders 5 on the ring plate 42 and the cylinder body 1 are the same and then locked. Then, the cylinders 5 are started, so that the piston rods on the cylinders 5 push the positioning blocks 51 to abut against the inner wall of the cylinder body 1. Since there is a soft rubber pad at the end of the positioning block 51, the positioning block 51 will not damage the inner wall of the cylinder body 1 when it abuts against the cylinder body 1. When the three positioning blocks 51 all abut against the inner wall of the cylinder body 1, the three positioning blocks 51 are in the same plane. Then, the reinforcing ring 11 is abutted against the three positioning blocks 51, and it can be ensured that the reinforcing ring 11 is perpendicular to the inner wall of the cylinder body 1. Finally, the reinforcing ring 11 is welded to the inner wall of the cylinder body 1.
[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them. Although the present utility model has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: it is still possible to modify the specific implementation manners of the present utility model or make equivalent substitutions, and any modification or equivalent substitution that does not depart from the spirit and scope of the present utility model shall be covered by the protection scope of the claims of the present utility model.
Claims
1. The reinforced outer cylinder in the LNG storage tank is characterized by: include: The cylinder has a wall thickness of 2mm to 2.5mm, and a plurality of reinforcing rings are welded at equal intervals on the inner wall of the cylinder. A plurality of reinforcing ribs are welded circumferentially between each two adjacent reinforcing rings, and the two ends of the reinforcing ribs are respectively welded to the two reinforcing rings.
2. The reinforced outer cylinder in the LNG storage tank according to claim 1, characterized in that: The reinforcement ring is formed by rolling any one of C-shaped steel, round steel or angle steel with a wall thickness of 1mm to 1.5mm, and the reinforcement ribs are made of steel of the same thickness and type as the reinforcement ring.
3. The reinforced outer cylinder in the LNG storage tank according to claim 1, characterized in that: Three reinforcing ribs are evenly distributed on the circumference between each two adjacent reinforcing rings, and each two adjacent rings of reinforcing ribs are staggered.
4. The positioning tool for the reinforced outer cylinder in the LNG storage tank is characterized by: include: A transfer table is provided on the transfer table, a positioning frame is provided on the transfer table, a lead screw is provided at the center position of the positioning frame for vertical rotation, the lead screw is connected to a driving mechanism, a lead screw seat is threadedly connected to the lead screw, a balance plate is provided on the lead screw seat, the lead screw seat is located at the center position of the balance plate, two guide rods are symmetrically provided with the lead screw as the center in the positioning frame, two linear bearings are provided on the balance plate, the two linear bearings are respectively slidably clamped on the two guide rods, a ring plate is fixedly provided on the balance plate, a plurality of cylinders are evenly distributed on the circumference of the ring plate, and a positioning block is provided on the piston rod of the cylinder.
5. The positioning tool for the reinforced outer cylinder in the LNG storage tank according to claim 4 is characterized in that: Four universal wheels are evenly distributed on the bottom of the transfer table.
6. The positioning tool for the reinforced outer cylinder in the LNG storage tank according to claim 4 is characterized in that: Three cylinders are evenly distributed on the circumference of the ring plate, one of which is located at the center line of the transfer platform, and the other two cylinders are symmetrically arranged with respect to the center line of the transfer platform.
7. The positioning fixture for the reinforced outer cylinder in the LNG storage tank according to claim 4 is characterized in that: The driving mechanism comprises: a reduction motor and a commutator, both of which are arranged at the left and right center positions of the transfer platform, the reduction motor is connected to the input shaft of the commutator, and the output shaft of the commutator is connected to the lead screw.
8. The positioning tool for the reinforced outer cylinder in the LNG storage tank according to claim 4 is characterized in that: A soft rubber pad is arranged at the end of the positioning block.