Transportation tank capable of achieving gas phase pressure self-balance

Abstract

The invention provides a transportation tank capable of realizing gas-phase pressure self-balance, which is used for solving the problems that the pressure of a gas-phase space in an existing transportation tank and the pressure of a gas-phase space in a liquid pumping pipe are unbalanced, and when a flange cover of the liquid pumping pipe is not tightly sealed, a medium is pressed out through the liquid pumping pipe inserted into the liquid-phase space, so that the pressure of the liquid pumping pipe is not balanced. And a flange cover of the liquid pumping pipe must be manually opened during loading. According to the transportation tank body capable of achieving gas phase pressure self-balance, through cooperation of the communicating hole A, the communicating hole B and the communicating hole C of the passage ball valve and all through holes in the valve body, when the valve is opened, liquid in the tank body can be pumped out to guarantee unloading operation through the communicating hole A, the communicating hole B and the liquid pumping pipe which are communicated, and when the valve is closed, liquid in the tank body can be pumped out to guarantee unloading operation. Through the communication hole C, the communication hole B and the ventilation channel, communication between the liquid pumping pipe and the meteorological space in the tank body is achieved, the liquid level difference phenomenon in the liquid pumping pipe and the liquid level difference phenomenon in the tank body are thoroughly eliminated, and the phenomenon that a medium is pressed out through the liquid pumping pipe is avoided.

Description

Technical Field

[0001] The invention relates to a transport tank for railways and highways, and in particular to a transport tank capable of achieving self-balancing of gas phase pressure. Background Art

[0002] At present, most of the liquid loading and unloading methods of tank trucks or tank containers are top loading and unloading, such as Figure 1 As shown, the tank structure of a relatively common tank truck or tank container is provided with an air inlet pipe 03 and a liquid extraction pipe 01 directly connected to the liquid collection cavity at the bottom of the tank 02 at the top of the tank, which is used for extracting liquid and unloading. However, this type of transport tank has the following disadvantages: First, when the vehicle is in normal operation, the flange covers of the air inlet pipe 03 and the liquid extraction pipe 01 should be tightly closed to prevent the medium in the tank from leaking out; but this will cause the pressure of the gas phase space in the tank 02 to be unbalanced with the pressure of the gas phase space in the liquid extraction pipe 01. After the tank 02 is exposed to the sun, the pressure of the gas phase space in the tank 02 increases. When the flange cover of the liquid extraction pipe 01 is not tightly sealed, the medium will be pressed out through the liquid extraction pipe 01 inserted into the liquid phase space of the tank. Second, in order to avoid the increase of the pressure of the gas phase space above the liquid extraction pipe 01 during loading, the flange cover of the liquid extraction pipe 01 must be opened manually. Summary of the invention

[0003] The purpose of the present invention is to solve the technical problems that the pressure of the gas phase space in the existing transport tank is unbalanced with the pressure of the gas phase space in the liquid extraction pipe, when the flange cover of the liquid extraction pipe is not sealed tightly, the medium will be pressed out through the liquid extraction pipe inserted into the liquid phase space, and the flange cover of the liquid extraction pipe must be opened manually when loading, and to provide a transport tank body that can achieve self-balance of gas phase pressure.

[0004] In order to achieve the above object, the technical solution of the present invention is:

[0005] A transport tank capable of achieving self-balancing of gas phase pressure comprises a tank body, the top of which is provided with an air inlet pipe, and the special feature of the tank body is that the top of the tank body is also provided with an unloading structure;

[0006] The unloading structure includes a passage ball valve, a pipe seat and a liquid extraction pipe;

[0007] The passage ball valve comprises a valve body, a valve arranged in the valve body, and a handle; the handle is connected to the outer wall of the valve, and one end of the handle extends out of the valve body; a connecting hole A, a connecting hole B and a connecting hole C which are interconnected are arranged in the valve, and the connecting hole A, the connecting hole B and the connecting hole C all extend to the outside of the valve;

[0008] The top of the tank body is provided with a through hole matching the aperture of the pipe seat for welding with the outer wall of the pipe seat; the upper end of the pipe seat extends out of the tank body and is provided with a pipe seat flange; the upper end surface of the pipe seat flange is sealed and connected to the lower end surface of the flange at the lower end of the valve body and is internally connected;

[0009] The liquid extraction pipe is located inside the tank body, the upper end of which passes through the pipe seat and is connected to the pipe seat flange, and the lower end extends into the liquid collection cavity at the bottom of the tank body;

[0010] A first through hole communicating with the outside is provided in the valve body at a position corresponding to the other end of the communicating hole A, and a second through hole communicating with the flange through hole of the valve body flange is provided in the valve body at a position corresponding to the other end of the communicating hole B.

[0011] An air vent is provided in the valve body, one end of which is connected to the outer wall of the valve, and the other end extends out of the bottom of the valve body; a first air vent is axially provided at a position corresponding to the other end of the air vent on the pipe seat flange and the pipe seat, respectively, so that the connecting hole C is connected to the second through hole, and the connecting hole B is connected to one end of the air vent when the handle drives the valve to rotate.

[0012] Furthermore, a valve cover is provided on the valve body at a position corresponding to the first through hole.

[0013] Furthermore, the apertures of the connecting hole A and the connecting hole B are the same and larger than the aperture of the connecting hole C;

[0014] The aperture of the communication hole C is larger than the aperture of the air passage.

[0015] Furthermore, the aperture of the second vent hole is larger than the aperture of the first vent hole, and the second vent hole is connected to the liquid extraction tube through hole on the tube seat.

[0016] Furthermore, the pipe seat flange and the flange of the valve body, the pipe seat flange and the pipe seat, and the valve body and the valve cover are all connected and fixed by bolts;

[0017] Sealing rings are provided at the connection between the pipe seat flange and the flange at the lower end of the valve body, at the connection between the pipe seat flange and the pipe seat, and at the connection between the valve body and the valve cover.

[0018] Furthermore, the connecting holes A, B and C are arranged in a T shape.

[0019] Furthermore, the connecting holes A, B and C are arranged in a Y shape.

[0020] Furthermore, the pipe seat, the liquid extraction pipe, and the pipe seat flange are all prepared by forging technology.

[0021] Furthermore, the outer side wall of the upper end of the liquid extraction pipe is welded to the inner side wall of the pipe seat flange.

[0022] Beneficial effects of the present invention:

[0023] 1. The present invention innovatively designs an unloading structure on a transport tank body. Through the cooperation of the connecting holes A, B and C of the passage ball valve and the through holes on the valve body, when the valve is opened, the liquid in the tank body can be extracted through the connected connecting holes A, B and the liquid extraction pipe to ensure the unloading operation while keeping the gas phase space in the liquid extraction pipe isolated from the gas phase space in the tank body. When the valve is closed, the gas space in the liquid extraction pipe is connected with the gas space in the tank body through the connecting holes C, B and the air passage, completely eliminating the liquid level difference in the liquid extraction pipe and the tank body, effectively avoiding the phenomenon of the medium being pressed out through the liquid extraction pipe, and also ensuring that no liquid gushing occurs when the unloading valve is opened. The present invention has high practicality and can be widely used in tank trucks and tank containers for railways and roads.

[0024] 2. The transport tank body provided by the present invention can realize self-balancing of gas phase pressure. The passage ball valve can realize self-balancing of gas phase pressure inside the tank body. There is no need to open the valve cover when loading, which reduces the risk of operators facing acid and alkali corrosive liquids in the liquid extraction pipe.

[0025] 3. In the present invention, the aperture of the connecting hole C is smaller than the apertures of the through hole A and the connecting hole B, and larger than the aperture of the vent. The connecting hole C can realize the self-balance of the gas phase pressure in the tank body, and can ensure the full connection between the connecting hole C and the vent.

[0026] 4. The aperture of the second vent hole in the present invention is larger than that of the first vent hole, and is connected to the through hole of the liquid extraction pipe on the tube seat, which effectively reduces the docking accuracy requirements of the second vent hole and the first vent hole, making the installation operation more convenient.

[0027] 5. The pipe seat, liquid extraction pipe and pipe seat flange in the present invention are all manufactured by forging machining method. Compared with the traditional casting processing method, the material density of the forging is better, which effectively improves the corrosion resistance of the pipe seat, liquid extraction pipe and pipe seat flange. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the tank structure based on the existing unloading structure;

[0029] Figure 1 The reference numerals in the drawings are:

[0030] 01-liquid extraction pipe; 02-tank body; 03-air inlet pipe;

[0031] Figure 2 It is a partial structural schematic diagram of an embodiment of a transport tank body capable of achieving gas phase pressure self-balancing of the present invention;

[0032] Figure 3It is a structural schematic diagram of the unloading structure in an embodiment of the present invention;

[0033] Figure 4 It is a structural schematic diagram of a pipe seat in the unloading structure of an embodiment of the present invention;

[0034] Figure 5 It is a structural schematic diagram of a liquid extraction pipe and a pipe seat flange in a car unloading structure according to an embodiment of the present invention;

[0035] Figure 6 It is a schematic diagram of the passage ball valve in the open unloading state in the embodiment of the present invention;

[0036] Figure 7 Schematic diagram of the passage ball valve in a closed state in an embodiment of the present invention.

[0037] Figure 2-Figure 7 The reference numerals in the drawings are:

[0038] 1-passage ball valve, 11-valve body, 12-valve, 13-handle, 14-flange, 15-air duct; 2-pipe seat flange, 21-first air vent; 3-pipe seat, 31-second air vent; 4-liquid extraction pipe; 5-tank body; 6-valve cover; 7-air inlet pipe. DETAILED DESCRIPTION

[0039] In order to make the advantages and features of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0040] like Figure 2 As shown, a transport tank capable of achieving self-balancing of gas phase pressure comprises a tank body 5, the top of which is provided with an unloading structure 0 and an air inlet pipe 7 for unloading the liquid in the tank.

[0041] like Figure 3-Figure 5 As shown, the unloading structure 0 includes a passage ball valve 1, a pipe seat 3, a liquid extraction pipe 4 and a valve cover 6. The passage ball valve 1 includes a valve body 11, a valve 12 and a handle 13; the valve 12 is arranged in the valve body 11, and the handle 13 is connected to the outer wall of the valve 12, and one end of the handle 13 extends out of the valve body 11, and is used to drive the valve 12 to rotate in the valve body 11 through the handle 13.

[0042] The valve 12 is provided with interconnected connecting holes A, B and C, which extend to the outside of the valve 12. In this embodiment, the connecting holes A, B and C are arranged in a T shape, and in other embodiments of the present invention, the three can also be arranged in a Y shape. Since the connecting holes A and B are used for liquid unloading operations, and the connecting hole C is only used to cooperate in achieving the self-balance of the gas phase pressure in the tank body, it is preferred that the apertures of the connecting holes A and B are the same and larger than the aperture of the connecting hole C; at the same time, the aperture of the connecting hole C is larger than the aperture of the vent 15, ensuring that the connecting hole C is fully connected with the vent.

[0043] A through hole matching the aperture of the pipe seat 3 is provided on the top of the tank body 5 for welding with the outer wall of the pipe seat 3. The upper end of the pipe seat 3 extends out of the tank body 5, and a pipe seat flange 2 is provided on the upper end thereof; the upper end surface of the pipe seat flange 2 is sealedly connected with the lower end surface of the flange plate 14 at the lower end of the valve body 11, and the interiors of the two flanges are connected. Specifically, the flange 2 and the flange plate 14, and the pipe seat flange 2 and the pipe seat 3 are connected by bolts, and sealing rings are provided at both connections.

[0044] The pipe seat, the liquid extraction pipe, and the pipe seat flange are all prepared by forging technology, and the pipe seat flange 2 and the liquid extraction pipe 4 are welded as one piece. The liquid extraction pipe 4 passes through the pipe seat 3, and the lower end extends into the liquid collection cavity at the bottom of the tank body; the gas phase space in the tank body 5 is connected with the gas phase space in the liquid extraction pipe 4. A first through hole connected to the outside is opened at the position corresponding to the other end of the connecting hole A in the valve body 11, and a second through hole connected to the flange through hole of the valve body flange 14 is opened at the position corresponding to the other end of the connecting hole B in the valve body 11, so as to make the liquid extraction pipe 4 connected to the external space of the tank body through the flange through hole of the valve body flange 14, the second through hole of the valve body 11, the connecting hole B, the connecting hole A and the first through hole of the valve body 11 in sequence. At the same time, the valve cover 6 is located at the position corresponding to the first through hole on the valve body 11, and the valve body 11 and the valve cover 6 are connected by bolts, and a sealing ring is provided at the connection to seal the first through hole.

[0045] An air passage 15 is provided in the valve body 11, one end of which is connected to the outer wall of the valve 12, and the other end extends out of the bottom of the valve body 11; a first air hole 21 is axially provided on the pipe seat flange 2 at a position corresponding to the other end of the air passage 15, and a second air hole 31 is provided at a corresponding position on the pipe seat 3, so as to keep the air passage 15 connected with the tank body 5. Preferably, the aperture of the second air hole 31 is larger than the aperture of the first air hole 21, and the second air hole 31 is connected with the liquid extraction pipe through hole on the pipe seat 3, which effectively reduces the docking precision requirements of the second air hole and the first air hole.

[0046] The principle of the unloading structure 0 of the present invention to achieve gas phase pressure self-balancing is: Figure 6As shown, when the valve is opened, the gas phase space in the liquid extraction pipe is kept isolated from the gas phase space in the tank body, and the liquid in the tank body is extracted through the connected connecting hole A, connecting hole B and the liquid extraction pipe to ensure the unloading operation; Figure 7 As shown, when the valve is closed, the connecting hole C is connected to the second through hole, and the connecting hole B is connected to one end of the vent 15. Through the connecting hole C, the connecting hole B and the vent, the connection between the liquid extraction pipe and the atmospheric space in the tank body is achieved, completely eliminating the liquid level difference between the liquid extraction pipe and the tank body.

[0047] The above description is only used to illustrate the technical solution of the present invention rather than to limit it. For ordinary professional and technical personnel in the field, the specific technical solution recorded in the above embodiment can be modified, or some of the technical features therein can be replaced by equivalents, and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution protected by the present invention.

Claims

1. A transport tank capable of achieving self-balancing of gas phase pressure, comprising a tank body (5), wherein an air inlet pipe (7) is arranged on the top of the tank body (5), and characterized in that: The top of the tank body (5) is also provided with a vehicle unloading structure (0); The unloading structure (0) comprises a passage ball valve (1), a pipe seat (3) and a liquid extraction pipe (4); The passage ball valve (1) comprises a valve body (11), a valve (12) arranged in the valve body (11), and a handle (13); the handle (13) is connected to the outer wall of the valve (12), and one end of the handle extends out of the valve body (11); a connecting hole A, a connecting hole B and a connecting hole C are provided in the valve (12) and are connected to each other, and the connecting hole A, the connecting hole B and the connecting hole C all extend to the outside of the valve (12); The top of the tank body (5) is provided with a through hole matching the aperture of the pipe seat (3) for welding with the outer wall of the pipe seat (3); the upper end of the pipe seat (3) extends out of the tank body (5) and is provided with a pipe seat flange (2); the upper end surface of the pipe seat flange (2) is connected to the lower end surface of the flange plate (14) at the lower end of the valve body (11) and is internally connected; The liquid extraction pipe (4) is located inside the tank body (5), the upper end of which passes through the pipe seat (3) and is connected to the pipe seat flange (2), and the lower end of which extends into the liquid collection cavity at the bottom of the tank body; A first through hole communicating with the outside is provided in the valve body (11) at a position corresponding to the other end of the communicating hole A, and a second through hole communicating with the flange through hole of the valve body flange (14) is provided in the valve body (11) at a position corresponding to the other end of the communicating hole B. The valve body (11) is provided with an air passage (15), one end of which is connected to the outer wall of the valve (12), and the other end of which extends out of the bottom of the valve body (11); the pipe seat flange (2) and the pipe seat (3) are axially provided with a first air passage (21) and a second air passage (31) at positions corresponding to the other end of the air passage (15), so as to enable the connecting hole C to be connected with the second through hole, and the connecting hole B to be connected with one end of the air passage (15) when the handle (13) drives the valve (12) to rotate.

2. A transport tank capable of achieving self-balancing of gas phase pressure according to claim 1, characterized in that: A valve cover (6) is arranged on the valve body (11) at a position corresponding to the first through hole.

3. A transport tank capable of achieving gas phase pressure self-balancing according to claim 2, characterized in that: The apertures of the connecting hole A and the connecting hole B are the same and larger than the aperture of the connecting hole C; The aperture of the communication hole C is larger than the aperture of the air passage (15).

4. A transport tank capable of achieving self-balancing of gas phase pressure according to claim 3, characterized in that: The diameter of the second ventilation hole (31) is larger than the diameter of the first ventilation hole (21), and the second ventilation hole (31) is connected to the liquid extraction pipe through hole on the pipe seat (3).

5. A transport tank capable of achieving self-balancing of gas phase pressure according to claim 4, characterized in that: The pipe seat flange (2) and the flange plate (14) of the valve body (11), the pipe seat flange (2) and the pipe seat (3), and the valve body (11) and the valve cover (6) are all connected and fixed by bolts; Sealing rings are provided at the connection between the pipe seat flange (2) and the flange plate (14) at the lower end of the valve body (11), the connection between the pipe seat flange (2) and the pipe seat (3), and the connection between the valve body (11) and the valve cover (6).

6. A transport tank capable of achieving self-balancing of gas phase pressure according to any one of claims 1 to 5, characterized in that: The communicating holes A, B and C are arranged in a T shape.

7. A transport tank capable of achieving self-balancing of gas phase pressure according to any one of claims 1 to 5, characterized in that: The connecting holes A, B and C are arranged in a Y shape.

8. The transport tank capable of achieving gas phase pressure self-balancing according to claim 1, characterized in that: The pipe seat (3), the liquid extraction pipe (4) and the pipe seat flange (2) are manufactured by a forging process.

9. A transport tank capable of achieving gas phase pressure self-balancing according to claim 8, characterized in that: The outer side wall of the upper end of the liquid extraction pipe (4) is welded to the inner side wall of the pipe base flange (2).

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