Assembly method of tank truck head protection device

Abstract

The present invention specifically relates to an assembly method for a tank truck head protection device, which solves the problem that the existing tank truck head is damaged and easily causes medium leakage. The assembly method of the tank truck head protection device includes the following steps: 1) positioning the first connecting plate and the second connecting plate on the protective head, and assembling the first connecting plate and the second connecting plate on the protective head; 2) lifting the protective head and sleeve it on the outside of the tank head, adjusting the distance between the end ring weld of the protective head and the tank body, and setting the corresponding vertical plate position on the tank body; 3) checking whether the connection is accurate; 4) positioning the remaining connecting plates on the protective head respectively, and positioning the vertical plates corresponding to the remaining connecting plates on the tank body; 5) welding all the connecting plates on the protective head respectively; 6) welding all the vertical plates on the tank body respectively; 7) lifting the protective head to the outside of the tank head, formally assembling it, and fastening all the connecting plates to the corresponding vertical plates respectively.

Description

Technical Field

[0001] The invention particularly relates to an assembling method of a tank truck head protection device. Background Art

[0002] Tank trucks, as one of the main types of railway freight cars, are mainly used to transport various liquid and liquefied gas media. Most of these media have dangerous properties such as flammability, explosiveness, corrosiveness, and toxicity. Some media even have multiple dangerous properties at the same time. Once leaked, they can easily cause accidents such as combustion and explosion, seriously affecting the safety of life and property of residents along the railway and causing serious harm to the environment around the railway.

[0003] In existing tank car accidents, media leaks due to damaged tank heads account for one-fifth of all leaks. Therefore, head protection devices are necessary to reduce the risk of the tank head being punctured by the coupler after a tank car derails and overturns. Therefore, the European RID specification explicitly stipulates that tank heads should be protected to limit losses in the event of a derailment. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem that the existing tank truck head is damaged and easily causes medium leakage, and to provide an assembling method of a tank truck head protection device.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A method for assembling a tank truck head protection device, for installing a protective head on the outside of a tank head, wherein the protective head is fixedly connected to the tank body through a first connecting plate, a second connecting plate, five connecting plates and corresponding seven vertical plates;

[0007] Its special feature is that it includes the following steps:

[0008] 1) Positioning the first connecting plate and the second connecting plate on the protective head, and assembling the first connecting plate and the second connecting plate on the protective head;

[0009] Define the diameter perpendicular to the central axis of the tank head and coinciding with the center point of the tank positioning groove as the starting line of the angle;

[0010] The included angle between the first connecting plate and the straight line of the angle starting point is 100°; the included angle between the second connecting plate and the straight line of the angle starting point is 260°;

[0011] 2) Lift the protective head cover and install it on the outside of the tank head. After adjusting the distance between the edge of the protective head and the end ring weld of the tank body to the preset distance, set the positions of the vertical plate and the backing plate corresponding to the first connecting plate and the second connecting plate on the tank body;

[0012] 3) Check whether the first connecting plate and the second connecting plate are accurately connected to the corresponding vertical plates;

[0013] 4) Position the remaining connecting plates on the protective head respectively, and position the corresponding vertical plates of the remaining connecting plates on the tank body;

[0014] 5) Lift the protective head to the platform and weld all the connecting plates on the protective head;

[0015] 6) Weld all vertical plates on the tank body separately;

[0016] 7) Lift the protective head to the outside of the tank head and formally assemble it, and fasten all the connecting plates to the corresponding vertical plates (21).

[0017] Furthermore, in step 2), before the protective head is hoisted and installed on the outside of the tank head, the method further includes:

[0018] A plurality of support components are provided on the outer surface of the tank head, and the height of the support components is greater than or equal to 20 mm.

[0019] Furthermore, in step 2), the preset distance is 40±5 mm;

[0020] The support assembly has a height of 20-35 mm and a diameter of 40 mm.

[0021] Furthermore, step 3) is specifically as follows:

[0022] Insert bolts into the first connecting plate, the second connecting plate and the corresponding vertical plates respectively, check whether the connection is qualified, and remove the bolts if qualified.

[0023] Furthermore, step 4) is specifically as follows:

[0024] Position the remaining five connecting plates on the protective head respectively, and position the vertical plates corresponding to the five connecting plates on the tank body through the pads.

[0025] Furthermore, step 6) is specifically as follows:

[0026] Weld all the pads to the tank body, and then weld all the vertical plates to the pads.

[0027] Furthermore, in step 4), among the remaining five connecting plates, the angle between two adjacent connecting plates is 50°.

[0028] Furthermore, in step 2), the height of the support assembly is 25 mm.

[0029] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0030] 1. Connection accuracy. The vertical plate is a fixing part on the tank head, and the connecting plate is a fixing part on the protective head. The vertical plate and the connecting plate are rigidly connected. If they are positioned and assembled according to the theoretical dimensions, the final connection may not be accurate. The assembly and connection method of the present invention is highly flexible and makes the assembly dimensions more accurate.

[0031] 2. High production efficiency. There is no need to underline the vertical plates and connecting plates. They can be accurately positioned during pre-assembly, reducing rework and improving production efficiency.

[0032] 3. Save time and labor. The application of the method of the present invention can realize the positioning of the vertical plate and the connecting plate at one time, avoiding the need to adjust the position back and forth, saving manpower and time. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic structural diagram of the state in which the protective head is sleeved on the tank head in the embodiment of the assembly method of the tank truck head protection device of the present invention;

[0034] Figure 2 This is a structural diagram of the connecting plate and the vertical plate in an embodiment of the assembly method of the tank truck head protection device of the present invention;

[0035] Figure 3 This is a structural schematic diagram of an embodiment of an assembly method of a tank truck head protection device of the present invention, in which a connecting plate is provided on the protective head.

[0036] The accompanying drawings are denoted as follows:

[0037] 1-protective head, 11-connecting plate, 12-first connecting plate, 13-second connecting plate, 2-tank head, 21-vertical plate, 22-pad. DETAILED DESCRIPTION

[0038] The inventive concept of the assembly method of a tank truck head protection device of the present invention is:

[0039] First, determine the size requirements for assembling the protective head 1 so that the distance between the protective head 1 and the tank head 2 is 25mm; the distance between the end face of the protective head 1 and the end ring seam of the tank body is 40±5mm. Figure 1 、 Figure 2As shown, the connection between the protective head 1 and the tank body is achieved by bolting the connecting plate 11 provided on the protective head 1 and the vertical plate 21 provided on the tank body pad 22. Since the weld of the vertical plate 21 is double-sided, the quality of the weld of the vertical plate 21 cannot be guaranteed if the protective head 1 is assembled at one time. Therefore, the method provided here is based on the premise of ensuring the final assembly size of the protective head 1. The vertical plate 21 on the tank body and the connecting plate 11 on the protective head 1 are first positioned using the idea of ​​pre-assembly. After removing the protective head 1, the vertical plate 21 is welded on the tank body, and then the protective head 1 and the connecting plate 11 are welded under the tank truck. After the welding is completed, the protective head 1 and the tank body head 2 are formally assembled. In this way, a flexible and reliable positioning method is used to reduce errors and rework caused by the marking method, improve production efficiency, and meet the needs of mass production.

[0040] In this embodiment, the assembly method of the tank truck head protection device specifically includes the following steps:

[0041] 1) Positioning the first connecting plate 12 and the second connecting plate 13 on the protective head 1 and assembling the first connecting plate 12 and the second connecting plate 13 on the protective head 1;

[0042] like Figure 3 As shown, the diameter perpendicular to the central axis of the tank head 2 and coinciding with the center point of the tank positioning groove is defined as the angle starting line;

[0043] The included angle between the first connecting plate 12 and the angle starting line is 100°; the included angle between the second connecting plate 13 and the angle starting line is 260°;

[0044] 2) Lift the protective head 1 and fit it over the tank head 2. Adjust the distance between the edge of the protective head 1 and the end ring weld of the tank to a preset distance of 40±5mm. Install several support assemblies on the outer surface of the tank. The support assemblies are 25mm high and 40mm in diameter. Then, install the vertical plate 21 and the backing plate 22 on the tank head 2, corresponding to the first and second connecting plates 12 and 13.

[0045] 3) Insert bolts into the first connecting plate 12 and the second connecting plate 13 and the corresponding vertical plates 21 respectively, check whether the connection is qualified, and remove the bolts if qualified.

[0046] 4) Position the remaining five connecting plates 11 on the protective head 1, and position the corresponding vertical plates 21 of the five connecting plates 11 on the tank body through the pads 22; wherein, the five connecting plates 11 are symmetrically arranged at an angle of 50° on both sides with the angle starting line as the reference;

[0047] 5) Lift the protective head 1 to the platform and weld all the connecting plates 11 on the protective head 1;

[0048] 6) Weld all the backing plates 22 onto the tank body, and then weld all the vertical plates 21 and backing plates 22;

[0049] 7) Lift the protective head 1 to the outside of the tank head 2 for formal assembly, and install all the connecting plates 11 and the corresponding vertical plates 21 with bolts and tighten them.

[0050] This embodiment is based on the premise of ensuring the final assembly size of the protective head 1 and adopts the idea of ​​pre-assembly. The vertical plate 21 connected to the protective head 1 on the tank body and the connecting plate 11 on the protective head 1 are first positioned. After removing the protective head 1, the vertical plate 21 is welded, and the protective head 1 and the connecting plate 11 are welded under the vehicle. After the welding is completed, the protective head 1 and the tank body are formally assembled.

Claims

1. A method for assembling a tank truck head protection device, for installing a protective head (1) on the outside of a tank head (2), wherein the protective head (1) is fixedly connected to the tank body via a first connecting plate (12), a second connecting plate (13), five connecting plates (11) and corresponding seven vertical plates (21); It is characterized in that The following steps are involved: 1) Positioning the first connecting plate (12) and the second connecting plate (13) on the protective head (1), and assembling the first connecting plate (12) and the second connecting plate (13) on the protective head (1); A diameter perpendicular to the central axis of the tank head (2) and coinciding with the center point of the tank positioning groove is defined as the angle starting point straight line; The included angle between the first connecting plate (12) and the straight line of the angle starting point is 100°; the included angle between the second connecting plate (13) and the straight line of the angle starting point is 260°; 2) hoisting the protective head (1) and sleeved it on the outside of the tank head (2), adjusting the distance between the edge of the protective head (1) and the end ring weld of the tank to a preset distance, and setting the positions of the vertical plate (21) and the backing plate (22) corresponding to the first connecting plate (12) and the second connecting plate (13) on the tank; 3) Check whether the first connecting plate (12) and the second connecting plate (13) are accurately connected to the corresponding vertical plates (21); 4) Positioning the remaining connecting plates (11) on the protective head (1) respectively, and positioning the vertical plates (21) corresponding to the remaining connecting plates (11) on the tank body; 5) Lift the protective head (1) to the platform and weld all the connecting plates (11) on the protective head (1); 6) Weld all the vertical plates (21) on the tank body; 7) Lift the protective head (1) to the outside of the tank head (2) and formally assemble it, and fasten all the connecting plates (11) to the corresponding vertical plates (21).

2. The method for assembling a tank truck head protection device according to claim 1, characterized in that: In step 2), before the protective cover (1) is hoisted and mounted on the outside of the tank cover (2), the following steps are also included: A plurality of support assemblies are provided on the outer surface of the tank head (2), and the height of the support assemblies is greater than or equal to 20 mm.

3. The method for assembling a tank truck head protection device according to claim 2, characterized in that: In step 2), the preset distance is 40±5 mm; The support assembly has a height of 20-35 mm and a diameter of 40 mm.

4. The method for assembling a tank truck head protection device according to any one of claims 2-3, characterized in that: Step 3) is as follows: Bolts are respectively inserted into the first connecting plate (12) and the second connecting plate (13) and the corresponding vertical plates (21) to check whether the connection is qualified. If qualified, the bolts are removed.

5. The method for assembling a tank truck head protection device according to claim 4, characterized in that: Step 4) is as follows: The remaining five connecting plates (11) are positioned on the protective head (1) respectively, and the vertical plates (21) corresponding to the five connecting plates (11) are positioned on the tank body through the pad (22).

6. The method for assembling a tank truck head protection device according to claim 5, characterized in that: Step 6) is as follows: All the backing plates (22) are welded to the tank body, and then all the vertical plates (21) are welded to the backing plates (22).

7. The method for assembling a tank truck head protection device according to claim 6, characterized in that: In step 4), among the remaining five connecting plates (11), the angle between two adjacent connecting plates (11) is 50°.

8. The method for assembling a tank truck head protection device according to claim 7, characterized in that: In step 2), the height of the support assembly is 25 mm.

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