A tank unloading device and a tank head opening process

Abstract

This invention discloses a tank container unloading device and a head opening process, including a tank container head, an opening at the lower part of the tank container head, a valve seat installed on the opening, and a bottom unloading valve connected to the valve seat. The tank container head is a convex head, and the inner wall of the tank container head between the opening and the bottom of the tank container body is a straightened section. The straightened section and the bottom of the tank container body are on the same horizontal line. The inner wall of the valve seat is a conical inner wall. When the valve seat is installed on the opening, the conical inner wall connected to the straightened section is on the same horizontal line as the straightened section and the bottom of the tank container body. The vertical distance between the lower end of the bottom unloading valve and the tank container frame below it is H1, and H1 ≥ 10 mm. This invention can solve the problem of liquid not being completely unloaded from the tank container.

Description

Technical Field

[0001] This invention belongs to the field of tank container technology, and relates to a tank container unloading device and a tank container end cap opening process. Background Technology

[0002] Bottom unloading is the most common method for unloading tank containers. The bottom unloading port is typically located near the bottom of one end cap of the tank. First, a hole is drilled in the end cap, then a valve seat is welded to the hole, and a bottom unloading valve is installed. The location of the hole significantly affects the amount of residual material in the tank after unloading. How to drill the hole to ensure all liquid is discharged from the tank needs to be studied and resolved. Existing technologies have a small arc at the lower end of the end cap opening, maintaining the original curved shape of the end cap. This results in the inner surface of the valve seat being higher than the inner surface of the tank during implementation. During unloading, the liquid flows from inside the tank through the bottom unloading valve seat and then out of the tank through the bottom unloading valve, completing the unloading process. However, current technology requires a certain gap between the bottom unloading valve and the frame. In this case, the inner surface of the bottom unloading valve seat is higher than the inner surface of the tank, creating a drop that prevents all liquid from being discharged, resulting in material waste. Summary of the Invention

[0003] In view of the defects and deficiencies in the prior art, the present invention provides a tank unloading device and a tank head opening process to overcome the problem that the liquid in the existing tanks cannot be completely unloaded.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A tank container unloading device includes a tank container head, an opening located at the lower part of the tank container head, a valve seat installed on the opening, and a bottom unloading valve connected to the valve seat;

[0006] The tank head is a convex head, and the inner wall of the tank head between the opening and the bottom of the tank body is a straightened section; the straightened section is on the same horizontal line as the bottom of the tank body;

[0007] The inner wall of the valve seat is a conical inner wall. When the valve seat is installed on the opening, the conical inner wall connected to the straightening section is on the same horizontal line as the straightening section and the bottom of the tank body.

[0008] The vertical distance between the lower end of the bottom discharge valve and the tank frame located below it is H1, and H1≥10mm.

[0009] The present invention also includes the following technical features:

[0010] Specifically, the central axis of the bottom discharge valve is horizontal; the lower inner wall of the bottom discharge valve is at a horizontal position lower than the lower inner wall of the valve seat.

[0011] Specifically, the connection between the lower part of the bottom discharge valve and the lower part of the valve seat is an arc connection; the highest point of the arc is not higher than the horizontal position of the straightening section.

[0012] A process for opening a tank container head, which enables the aforementioned opening, includes the following steps:

[0013] Step 1: Cut an initial through hole at the bottom of the tank head. The vertical distance between the highest and lowest points of the initial through hole is H1, and the distance between the left and right ends of the initial through hole is B1. The final diameter of the opening is D. The initial through hole must satisfy H1 = D / 2 and B1 < D / 2. Then, use a spinning machine to vertically press down and spin the tank head on the left and right sides and below the initial through hole to form it.

[0014] Step 2: When the tank head below the initial through hole is turned outward, the hole is enlarged until the vertical distance between the highest and lowest points of the through hole is H2, and the distance between the left and right ends of the through hole is B2, satisfying B2 = D and H2 = 2D / 3; continue spinning using a spinning machine;

[0015] Step 3: When the bottom edge of the through hole turns outward again, enlarge the hole until the vertical distance between the highest and lowest points of the through hole is H3 and the distance between the left and right ends of the through hole is B3, and satisfy B3 = D and H3 = 4D / 5. Continue spinning using a spinning machine.

[0016] Step 4: Repeat the above operations until the inner wall of the tank head between the through hole and the bottom of the tank body is pressed into a straight section. Then, round it until the diameter of the through hole is D to obtain the opening. The inner wall of the tank head between the opening and the bottom of the tank body is a pressed straight section. The pressed straight section is on the same horizontal line as the bottom of the tank body.

[0017] Compared with the prior art, the beneficial technical effects of this invention are:

[0018] This invention allows all materials inside the tank to be unloaded, preventing material waste. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the tank unloading device of the present invention;

[0020] Figure 2 This is a schematic diagram of the first step of the tank head opening process of the present invention. The left side is the main view of the initial through hole, and the right side is the side view of the initial through hole.

[0021] Figure 3 This is a schematic diagram of step two of the tank head opening process of the present invention. The left side is the main view of the through hole, and the right side is the side view of the through hole.

[0022] Figure 4This is a schematic diagram of step three of the tank head opening process of the present invention. The left side is the main view of the through hole, and the right side is the side view of the through hole.

[0023] Figure 5 This is a schematic diagram of step four of the tank head opening process of the present invention. The left side is the front view of the opening, and the right side is the side view of the opening.

[0024] Meaning of the symbols in the attached image:

[0025] 1. Tank head, 2. Opening, 3. Valve seat, 4. Bottom discharge valve, 5. Tank body, 6. Straightening section, 7. Tank frame.

[0026] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Detailed Implementation

[0027] Following the above technical solutions, specific embodiments of the present invention are given below. It should be noted that the present invention is not limited to the following specific embodiments, and all equivalent modifications made based on the technical solutions of this application fall within the protection scope of the present invention. The present invention will be further described in detail below with reference to the embodiments.

[0028] Example 1:

[0029] This embodiment provides a tank unloading device, including a tank head 1, an opening 2 located at the lower part of the tank head 1, a valve seat 3 installed on the opening 2, and a bottom unloading valve 4 connected to the valve seat 3.

[0030] The tank head 1 is a convex head, and the inner wall of the tank head 1 located between the opening 2 and the bottom of the tank body 5 is a straightening section 6; the straightening section 6 and the bottom of the tank body 5 are on the same horizontal line, so that the liquid inside the tank can flow out smoothly.

[0031] The inner wall of the valve seat 3 is a conical inner wall. When the valve seat 3 is installed on the opening 2, the conical inner wall connected to the straightening section 6 is on the same horizontal line as the straightening section 6 and the bottom of the tank body 5, so that the liquid inside the tank can flow out smoothly.

[0032] The vertical distance between the lower end of the bottom discharge valve 4 and the tank frame 7 located below it is H1, and H1≥10mm.

[0033] Specifically, the central axis of the bottom discharge valve 4 is horizontal; the horizontal position of the lower inner wall of the bottom discharge valve 4 is lower than the horizontal position of the lower inner wall of the valve seat 3.

[0034] Specifically, the connection between the lower part of the bottom discharge valve 4 and the lower part of the valve seat 3 is an arc connection; the highest point of this arc is not higher than the horizontal position of the straight section 6.

[0035] Example 2:

[0036] This embodiment provides a process for opening a tank head, which can achieve the opening of Embodiment 1, and includes the following steps:

[0037] Step 1: Follow Figure 2 An initial through hole is cut at the bottom of the tank head. The vertical distance between the highest and lowest points of the initial through hole is H1, and the distance between the left and right ends of the initial through hole is B1. The diameter of the final opening is D. The initial through hole must satisfy H1 = D / 2 and B1 < D / 2. Then, the tank head on the left and right sides and below the initial through hole is vertically pressed down and spun left and right to form the shape using a spinning machine.

[0038] Step Two: When the tank head below the initial through-hole is turned outward, the hole is enlarged until the vertical distance between the highest and lowest points of the through-hole is H2, and the distance between the left and right ends of the through-hole is B2, satisfying B2 = D and H2 = 2D / 3. Figure 3 As shown; spinning continues using a spinning machine;

[0039] Step 3: When the bottom edge of the through hole flares out again, enlarge the hole until the vertical distance between the highest and lowest points of the through hole is H3, and the distance between the left and right ends of the through hole is B3, satisfying B3 = D and H3 = 4D / 5. Figure 4 As shown, spinning continues using a spinning machine;

[0040] Step four, repeat the above operations until the inner wall of the tank head between the through hole and the bottom of the tank body is pressed into a straight section, then round it until the diameter of the through hole is D, thus obtaining the opening, as shown. Figure 5 As shown, the inner wall of the tank head between the opening and the bottom of the tank body is a straightened section; the straightened section is located on the same horizontal line as the bottom of the tank body.

Claims

1. A process for opening holes in the end caps of a tank container, characterized in that, The opening (2) of the tank unloading device can be obtained through the tank head opening process. The tank unloading device includes a tank head (1), an opening (2) located at the bottom of the tank head (1), a valve seat (3) installed on the opening (2), and a bottom unloading valve (4) connected to the valve seat (3). The tank head (1) is a convex head, and the inner wall of the tank head (1) located between the opening (2) and the bottom of the tank body (5) is a straight section (6); the straight section (6) and the bottom of the tank body (5) are on the same horizontal line; The inner wall of the valve seat (3) is a conical inner wall. When the valve seat (3) is installed on the opening (2), the conical inner wall connected to the straightening section (6) is on the same horizontal line as the bottom of the straightening section (6) and the tank body (5). The vertical distance between the lower end of the bottom discharge valve (4) and the tank frame (7) located below it is H1, and H1≥10mm; The central axis of the bottom discharge valve (4) is horizontal; the horizontal position of the lower inner wall of the bottom discharge valve (4) is lower than the horizontal position of the lower inner wall of the valve seat (3); The connection between the lower part of the bottom discharge valve (4) and the lower part of the valve seat (3) is an arc connection; the highest point of the arc is not higher than the horizontal position of the straight section (6); The process includes the following steps: Step 1: Cut an initial through hole at the bottom of the tank head. The vertical distance between the highest and lowest points of the initial through hole is H1, and the distance between the left and right ends of the initial through hole is B1. The final diameter of the opening is D. The initial through hole must satisfy H1 = D / 2 and B1 < D / 2. Then, use a spinning machine to vertically press down and spin the tank head on the left and right sides and below the initial through hole to form it. Step 2: When the tank head below the initial through hole is turned outward, the hole is enlarged until the vertical distance between the highest and lowest points of the through hole is H2, and the distance between the left and right ends of the through hole is B2, satisfying B2 = D and H2 = 2D / 3; continue spinning using a spinning machine; Step 3: When the bottom edge of the through hole turns outward again, enlarge the hole until the vertical distance between the highest and lowest points of the through hole is H3 and the distance between the left and right ends of the through hole is B3, and satisfy B3 = D and H3 = 4D / 5. Continue spinning using a spinning machine. Step 4: Repeat the above operations until the inner wall of the tank head between the through hole and the bottom of the tank body is pressed into a straight section. Then, round it until the diameter of the through hole is D to obtain the opening. The inner wall of the tank head between the opening and the bottom of the tank body is a pressed straight section. The pressed straight section is on the same horizontal line as the bottom of the tank body. A valve seat (3) is installed on the opening (2), and the valve seat (3) is connected to the bottom discharge valve (4); The tank head (1) is a convex head, and the inner wall of the tank head (1) located between the opening (2) and the bottom of the tank body (5) is a straight section (6); the straight section (6) and the bottom of the tank body (5) are on the same horizontal line; The inner wall of the valve seat (3) is a conical inner wall. When the valve seat (3) is installed on the opening (2), the conical inner wall connected to the straightening section (6) is on the same horizontal line as the bottom of the straightening section (6) and the tank body (5). The vertical distance between the lower end of the bottom discharge valve (4) and the tank frame (7) located below it is H1, and H1≥10mm; The central axis of the bottom discharge valve (4) is horizontal; the horizontal position of the lower inner wall of the bottom discharge valve (4) is lower than the horizontal position of the lower inner wall of the valve seat (3); The connection between the lower part of the bottom discharge valve (4) and the lower part of the valve seat (3) is an arc connection; the highest point of the arc is not higher than the horizontal position of the straight section (6).

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