Class C liquid loading system

Abstract

The utility model relates to the technical field of chemical equipment, in particular to a class C liquid loading system which comprises a liquid storage tank, a liquid conveying tank, an infusion pump and a balance pipe, the liquid inlet end of the infusion pump is communicated with the bottom of the liquid storage tank, the liquid outlet end of the infusion pump is communicated with the bottom of the liquid conveying tank, and one end of the balance pipe is communicated with the top of the liquid conveying tank. The other end of the balance pipe is communicated with the top of the liquid storage tank, and the liquid conveying tank is communicated with the liquid storage tank through the balance pipe, so that the air pressure at the top of the liquid conveying tank is balanced with the air pressure at the top of the liquid storage tank, the pressure in the liquid conveying tank is prevented from being too high, the class C liquid in the liquid storage tank can be smoothly filled into the liquid conveying tank, and a manufacturer does not need to build an oil gas recovery system; and the construction and maintenance costs of manufacturers are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical equipment, in particular to a loading system for Class C liquids. Background Art

[0002] Class C liquids are liquids with a flash point ≥ 60 °C, also known as flammable liquids. The transportation of Class C liquids requires the use of special tank trucks. During the loading process of Class C liquids, volatile gases are generated, which will cause the pressure inside the tank of the tank truck to increase, affecting the liquid filling. To avoid excessive air pressure inside the tank of the tank truck, an exhaust pipe needs to be connected to the top of the tank of the tank truck. The exhaust pipe is used to discharge the volatile gases inside the tank during the loading process into the oil and gas recovery system. Therefore, the existing loading system for Class C liquids requires manufacturers to build an oil and gas recovery system, increasing the construction and maintenance costs of the manufacturers. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is that currently, the loading system for Class C gases requires the construction of an oil and gas recovery system for recovering the oil and gas generated during the loading process, increasing the construction and maintenance costs of the manufacturers.

[0004] To solve the above technical problem, the purpose of the utility model is to provide a loading system for Class C liquids, including a liquid storage tank, a liquid transportation tank, a liquid pumping pump, and a balance pipe. The liquid inlet end of the liquid pumping pump is communicated with the bottom of the liquid storage tank, the liquid outlet end of the liquid pumping pump is communicated with the bottom of the liquid transportation tank, one end of the balance pipe is communicated with the top of the liquid transportation tank, and the other end of the balance pipe is communicated with the top of the liquid storage tank.

[0005] As a preferred solution, the liquid outlet end of the liquid pumping pump is sequentially connected with a first oil pipeline and a loading arm, and the loading arm is connected to the liquid inlet of the liquid transportation tank.

[0006] As a preferred solution, a first valve body is provided at the liquid inlet of the liquid transportation tank. The first end of the loading arm is connected to the first valve body, and the second end of the loading arm is connected to the first liquid pipeline.

[0007] As a preferred solution, the loading system for Class C liquids includes a vacuum tank and a recovery pipe. One end of the recovery pipe is communicated with the vacuum tank, and the other end of the recovery pipe is communicated with the loading arm.

[0008] As a preferred solution, a second valve body is connected to the end of the recovery pipe far away from the vacuum tank, and the end of the second valve body far away from the recovery pipe is communicated with the loading arm.

[0009] As a preferred solution, the recovery pipe is communicated with the upper part of the vacuum tank. The bottom of the vacuum tank is communicated with the liquid storage tank through a liquid discharge pipe, and a third valve body is provided in the liquid discharge pipe.

[0010] As a preferred solution, the third valve body is arranged at one end of the liquid discharge pipe close to the vacuum tank, and a fourth valve body is connected to one end of the liquid discharge pipe close to the liquid storage tank. The fourth valve body is communicated with the liquid storage tank.

[0011] As a preferred solution, the liquid outlet end of the liquid extraction pump is connected with a fifth valve body, and the fifth valve body is connected to the first oil delivery pipe.

[0012] As a preferred solution, one end of the balance pipe is connected with a sixth valve body, the sixth valve body is communicated with the liquid transportation tank, the other end of the balance tank is connected with a seventh valve body, and the seventh valve body is communicated with the liquid storage tank.

[0013] As a preferred solution, the liquid outlet of the liquid storage tank is sequentially connected with an eighth valve body, a second liquid delivery pipe and a ninth valve body, and the ninth valve body is connected to the liquid inlet end of the liquid extraction pump.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] The Class C liquid loading system of the present utility model includes a liquid storage tank, a liquid transportation tank, a liquid extraction pump and a balance pipe. The liquid inlet end of the liquid extraction pump is communicated with the bottom of the liquid storage tank, the liquid outlet end of the liquid extraction pump is communicated with the bottom of the liquid transportation tank, one end of the balance pipe is communicated with the top of the liquid transportation tank, and the other end of the balance pipe is communicated with the top of the liquid storage tank. The balance pipe connects the liquid transportation tank and the liquid storage tank, so that the air pressure at the top of the liquid transportation tank is balanced with the air pressure at the top of the liquid storage tank, thereby avoiding excessive pressure in the liquid transportation tank, ensuring that the Class C liquid in the liquid storage tank can be smoothly poured into the liquid transportation tank, eliminating the need for the manufacturer to build an oil and gas recovery system, and reducing the construction and maintenance costs of the manufacturer. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of the Class C liquid loading system of the present utility model;

[0017] In the figure, 1. Liquid storage tank, 2. Liquid transportation tank, 3. Liquid extraction pump, 4. Balance pipe, 51. First oil delivery pipe, 52. Loading arm, 53. Recovery pipe, 54. Liquid discharge pipe, 55. Second liquid delivery pipe, 61. First valve body, 62. Second valve body, 63. Third valve body, 64. Fourth valve body, 65. Fifth valve body, 66. Sixth valve body, 67. Seventh valve body, 68. Eighth valve body, 69. Ninth valve body, 7. Vacuum tank, 81. Tenth valve body. Detailed Embodiments

[0018] The following combines the drawings and embodiments to further describe in detail the specific embodiments of the present utility model. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0019] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. It should be understood that the present utility model uses the terms "first", "second", etc. to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present utility model, the "first" information can also be referred to as the "second" information, and similarly, the "second" information can also be referred to as the "first" information.

[0020] As Figure 1 shown, a preferred embodiment of the Class C liquid loading system of the present utility model includes a liquid storage tank 1, a liquid transportation tank 2, a liquid pumping pump 3, and a balance pipe 4. The liquid inlet end of the liquid pumping pump 3 is connected to the bottom of the liquid storage tank 1, and the liquid outlet end of the liquid pumping pump 3 is connected to the bottom of the liquid transportation tank 2. One end of the balance pipe 4 is connected to the top of the liquid transportation tank 2, and the other end of the balance pipe 4 is connected to the top of the liquid storage tank 1. The balance pipe 4 connects the liquid transportation tank 2 and the liquid storage tank 1, so that the air pressure at the top of the liquid transportation tank 2 is balanced with the air pressure at the top of the liquid storage tank 1, thereby avoiding excessive pressure in the liquid transportation tank 2 and ensuring that the Class C liquid in the liquid storage tank 1 can be smoothly poured into the liquid transportation tank 2. There is no need for the manufacturer to build an oil and gas recovery system, reducing the construction and maintenance costs of the manufacturer.

[0021] For the convenience of pouring Class C liquid, in this embodiment, the liquid outlet end of the liquid pumping pump 3 is sequentially connected with a first oil pipeline 51 and a loading arm 52, and the loading arm 52 is connected to the liquid inlet of the liquid transportation tank 2. The loading arm 52 is a special device in the fluid loading and unloading process of the petrochemical industry, also known as a fluid loading and unloading arm, which has the characteristics of high safety, flexibility, and long service life.

[0022] Specifically, a first valve body 61 is provided at the liquid inlet of the liquid transportation tank 2. The first end of the loading arm 52 is connected to the first valve body 61, and the second end of the loading arm 52 is connected to the first liquid pipeline. When in use, first close the first valve body 61, connect the loading arm 52 after the first valve body 61, open the first valve body 61, and turn on the liquid pumping pump 3 to start the pouring operation.

[0023] To avoid residual Class C liquid in the loading arm 52, in this embodiment, the Class C liquid loading system includes a vacuum tank 7 and a recovery pipe 53. One end of the recovery pipe 53 is connected to the vacuum tank 7, and the other end of the recovery pipe 53 is connected to the loading arm 52. Specifically, the recovery pipe 53 sucks the residual Class C liquid in the loading arm 52 into the vacuum tank 7, which can avoid residual Class C liquid in the loading arm 52 and reduce the harm to the operators and the impact on the working environment caused by the odor of chemical products discharged during the disassembly of the loading arm 52.

[0024] Among them, in order to facilitate the control of the timing of the recovery pipe 53 sucking the residual Class C liquid from the crane pipe 52, in this embodiment, the end of the recovery pipe 53 away from the vacuum tank 7 is connected to the second valve body 62, and the end of the second valve body 62 away from the recovery pipe 53 is connected to the crane pipe 52. During the infusion process, the second valve body 62 is closed, and when it is necessary to suck the residual Class C liquid in the crane pipe 52, the second valve body 62 is opened. Furthermore, in this embodiment, the crane pipe 52 is arranged up and down, and the second valve body 62 is connected to the lower end of the crane pipe 52. The Class C liquid in the crane pipe 52 will flow to the lower end under the action of its own gravity, thereby ensuring that the recovery pipe 53 can clean the residual Class C liquid in the crane pipe 52. In this embodiment, the Class C liquid is oil, and the liquid transport tank 2 is a tank body on a tank truck.

[0025] To facilitate maintenance or replacement of the recovery tube 53, a tenth valve body 81 is connected to the upper portion of the vacuum tank 7, one end of the recovery tube 53 is connected to the tenth valve body 81, and the other end of the recovery tube 53 is connected to the second valve body 62. When maintenance or replacement of the recovery tube 53 is required, the second valve body 62 and the tenth valve body 81 are closed at the same time.

[0026] After the Class C liquid in the vacuum tank 7 accumulates to a certain volume, it needs to be discharged in time. To facilitate the discharge of the Class C liquid in the vacuum tank 7, in this embodiment, the recovery pipe 53 is connected to the upper part of the vacuum tank 7, and the bottom of the vacuum tank 7 is connected to the liquid storage tank 1 through the liquid discharge pipe 54, and the third valve body 63 is provided in the liquid discharge pipe 54. After the Class C liquid in the vacuum tank 7 reaches the set amount, the third valve body 63 is opened to empty the vacuum tank 7, and at the same time, the Class C liquid is discharged from the vacuum tank 7 and flows into the oil storage tank to be refilled. In this embodiment, the volume of the vacuum tank 7 is 1 cubic meter, and a liquid level gauge is provided in the vacuum tank 7. When the liquid level in the vacuum tank 7 reaches the set value, the third valve body 63 is opened to start the emptying operation of the vacuum tank 7. In this embodiment, the vacuum tank 7 is set at a higher position than the liquid storage tank 1, that is, the lowest end of the vacuum tank 7 is higher than the top of the liquid storage tank 1. During the construction process, the vacuum tank 7 can be set on the second floor and the liquid storage tank 1 can be set on the first floor, or the oil storage tank 1 can be set below the ground and the vacuum tank 7 can be set above the ground. The vacuum tank 7 is connected to a pressure relief valve and a vacuum pump for evacuating the vacuum tank 7. When the vacuum tank 7 needs to be emptied, the pressure relief valve is opened to reduce the air pressure in the vacuum tank 7 to the standard atmospheric pressure, so that the Class C liquid in the vacuum tank 7 can flow out. After the vacuum tank 7 is emptied, the pressure relief valve is closed and the vacuum pump is turned on, which is conducive to the vacuum pump to make the vacuum tank reach the set negative pressure value.

[0027] For the convenience of replacing and maintaining the liquid discharge pipe 54 between the vacuum tank 7 and the liquid storage tank 1, in this embodiment, the third valve body 63 is arranged at one end of the liquid discharge pipe 54 close to the vacuum tank 7. The third valve body 63 is communicated with the vacuum tank 7. One end of the liquid discharge pipe 54 close to the liquid storage tank 1 is connected with a fourth valve body 64, and the fourth valve body 64 is communicated with the liquid storage tank 1. When the liquid discharge pipe 54 needs to be maintained or replaced, the third valve body 63 and the fourth valve body 64 are closed. When it is necessary to empty the Class C liquid in the vacuum tank 7, the third valve body 63 and the fourth valve body 64 are opened simultaneously.

[0028] For the convenience of maintaining and replacing the first oil delivery pipe 51, in this embodiment, the liquid outlet end of the liquid extraction pump 3 is connected with a fifth valve body 65, and the fifth valve body 65 is connected with the first oil delivery pipe 51.

[0029] For the convenience of maintaining and replacing the balance pipe 4, in this embodiment, one end of the balance pipe 4 is connected with a sixth valve body 66, and the sixth valve body 66 is communicated with the liquid transportation tank 2. The other end of the balance tank is connected with a seventh valve body 67, and the seventh valve body 67 is communicated with the liquid storage tank 1. When the balance pipe 4 needs to be maintained or replaced, the sixth valve body 66 and the seventh valve body 67 are opened simultaneously. After the replacement or maintenance of the balance pipe 4 is completed, the seventh valve body 67 is kept open all the time. When performing the perfusion operation, the sixth valve body 66 is opened, and after the perfusion operation is completed, the sixth valve body 66 is closed.

[0030] In this embodiment, the liquid outlet of the liquid storage tank 1 is sequentially connected with an eighth valve body 68, a second liquid delivery pipe 55 and a ninth valve body 69, and the ninth valve body 69 is connected with the liquid inlet end of the liquid extraction pump 3. When the liquid extraction pump 3 needs to be maintained, the ninth valve body 69 is closed. When the second liquid delivery pipe 55 needs to be maintained, the eighth valve body 68 is closed.

[0031] In summary, the Class C liquid loading system of the present utility model includes a liquid storage tank 1, a liquid transportation tank 2, a liquid extraction pump 3 and a balance pipe 4. The liquid inlet end of the liquid extraction pump 3 is communicated with the bottom of the liquid storage tank 1, the liquid outlet end of the liquid extraction pump 3 is communicated with the bottom of the liquid transportation tank 2, one end of the balance pipe 4 is communicated with the top of the liquid transportation tank 2, and the other end of the balance pipe 4 is communicated with the top of the liquid storage tank 1. The balance pipe 4 connects the liquid transportation tank 2 and the liquid storage tank 1, so that the air pressure at the top of the liquid transportation tank 2 is balanced with the air pressure at the top of the liquid storage tank 1, thereby avoiding excessive pressure in the liquid transportation tank 2 and ensuring that the Class C liquid in the liquid storage tank 1 can be smoothly poured into the liquid transportation tank 2. It is not necessary for the manufacturer to build an oil and gas recovery system, reducing the construction and maintenance costs of the manufacturer. Moreover, by setting the vacuum tank 7 and the recovery pipe 53, the residual Class C liquid in the loading arm can be recovered, avoiding the harm caused by the residual Class C liquid in the loading arm.

[0032] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present utility model, several improvements and replacements can still be made, and these improvements and replacements should also be regarded as the protection scope of the present utility model.

Claims

1. A Class C liquid loading system, characterized in that: The invention comprises a liquid storage tank (1), a liquid transport tank (2), a liquid extraction pump (3) and a balance pipe (4); the liquid inlet end of the liquid extraction pump (3) is connected to the bottom of the liquid storage tank (1); the liquid outlet end of the liquid extraction pump (3) is connected to the bottom of the liquid transport tank (2); one end of the balance pipe (4) is connected to the top of the liquid transport tank (2); and the other end of the balance pipe (4) is connected to the top of the liquid storage tank (1).

2. The Class C liquid loading system according to claim 1, characterized in that: The liquid outlet end of the liquid pump (3) is connected to a first oil delivery pipe (51) and a lifting pipe (52) in sequence, and the lifting pipe (52) is connected to the liquid inlet of the liquid transport tank (2).

3. The Class C liquid loading system according to claim 2, characterized in that: The liquid inlet of the liquid transport tank (2) is provided with a first valve body (61), the first end of the lift pipe (52) is connected to the first valve body (61), and the second end of the lift pipe (52) is connected to the first oil pipeline.

4. The Class C liquid loading system according to claim 3, characterized in that: The Class C liquid loading system comprises a vacuum tank (7) and a recovery pipe (53), one end of the recovery pipe (53) is connected to the vacuum tank (7), and the other end of the recovery pipe (53) is connected to the crane pipe (52).

5. The Class C liquid loading system according to claim 4, characterized in that: One end of the recovery pipe (53) away from the vacuum tank (7) is connected to a second valve body (62), and one end of the second valve body (62) away from the recovery pipe (53) is in communication with the lifting pipe (52).

6. The Class C liquid loading system according to claim 4, characterized in that: The recovery pipe (53) is in communication with the upper portion of the vacuum tank (7), and the bottom of the vacuum tank (7) is in communication with the liquid storage tank (1) via a liquid discharge pipe (54), wherein a third valve body (63) is provided in the liquid discharge pipe (54).

7. The Class C liquid loading system according to claim 6, characterized in that: The third valve body (63) is arranged at one end of the liquid discharge pipe (54) close to the vacuum tank (7), and one end of the liquid discharge pipe (54) close to the liquid storage tank (1) is connected to the fourth valve body (64), and the fourth valve body (64) is in communication with the liquid storage tank (1).

8. The Class C liquid loading system according to claim 2, characterized in that: The liquid outlet end of the liquid pump (3) is connected to a fifth valve body (65), and the fifth valve body (65) is connected to the first oil delivery pipe (51).

9. The Class C liquid loading system according to claim 1, characterized in that: One end of the balance pipe (4) is connected to a sixth valve body (66), and the sixth valve body (66) is in communication with the liquid transport tank (2); the other end of the balance pipe is connected to a seventh valve body (67), and the seventh valve body (67) is in communication with the liquid storage tank (1).

10. The Class C liquid loading system according to claim 1, characterized in that: The liquid outlet of the liquid storage tank (1) is connected to an eighth valve body (68), a second liquid infusion tube (55) and a ninth valve body (69) in sequence, and the ninth valve body (69) is connected to the liquid inlet end of the liquid pump (3).

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