A kind of tank car fills dangerous material's instrument protection device and tank car

Abstract

This utility model relates to an instrument protection device for tank trucks used for filling hazardous materials and the tank truck itself. It is used for level control of the tank. A root valve is located at the top of the tank, and the root valve has a first flange. The instrument protection device includes a controller; a filling pump electrically connected to the controller, used for filling the tank; and a level switch electrically connected to the controller. The level switch has a second flange, passes vertically through the root valve, and its end is inserted into the tank. The second flange and the first flange are detachably connected. The level switch and pressure switch of this utility model can avoid moving with the tank, thereby reducing the risk of damage to the level switch and pressure switch. It also avoids complicated wiring and debugging operations, improving work efficiency.

Description

Technical Field

[0001] This utility model relates to the field of liquid level detection technology, and in particular to an instrument protection device for tank trucks used for filling hazardous materials, and the tank truck itself. Background Technology

[0002] Byproducts from the filling process, such as HCl and 30%HF, are usually filled into tank trucks for transportation. Since the tank trucks are mobile, level control during the filling process is crucial. There have been several instances where the tanks were filled without checking the level and the pumps were not stopped, leading to overflow and posing a safety hazard of byproduct leakage.

[0003] To improve the level control effect, the initial approach was to set the product flow rate based on the tank capacity. However, since the tank capacity of each truck was different, overflowing often occurred due to level errors or flow failures during each filling, resulting in poor level control. Later, level switches and pressure switches were installed on the tanks of each tank truck. The level switches and pressure switches moved with the tank truck, and wiring and debugging were required before each filling. After filling, the connections had to be disconnected, which was time-consuming, labor-intensive, and inefficient. Moreover, the level switches and pressure switches were particularly prone to damage as they moved with the tank truck, resulting in high maintenance costs. Summary of the Invention

[0004] Therefore, the technical problem to be solved by this utility model is to overcome the problems of easy damage and complicated wiring and debugging of level switches and pressure switches that move with the tank in the prior art. In this way, an instrument protection device and a tank truck for filling dangerous materials are provided, in which the level switches and pressure switches can avoid moving with the tank, thereby reducing the risk of damage to the level switches and pressure switches, avoiding complicated wiring and debugging operations, and improving work efficiency.

[0005] To solve the above-mentioned technical problems, this utility model provides an instrument protection device for tank trucks filling hazardous materials, used for liquid level control of the tank. The top of the tank is equipped with a root valve, and the root valve has a first flange. The instrument protection device includes…

[0006] Controller;

[0007] A filling pump, which is electrically connected to the controller, is used to fill the tank;

[0008] A level switch is electrically connected to the controller. The level switch has a second flange. The level switch passes vertically through the root valve and its end is inserted into the tank. The second flange and the first flange can be detachably connected.

[0009] In one embodiment of this utility model, a sleeve with a third flange and a fourth flange respectively connected to both ends is further included. The third flange is connected to the first flange, the fourth flange is connected to the second flange, and the sleeve is fitted over the liquid level switch.

[0010] In one embodiment of this utility model, the liquid level switch is configured as a tuning fork liquid level switch, the tuning fork liquid level switch is provided with a second flange, and the second flange is connected to the fourth flange.

[0011] In one embodiment of this utility model, the diameter of the sleeve is larger than the diameter of the liquid level switch.

[0012] In one embodiment of this utility model, the inner wall of the sleeve is provided with a sealing structure.

[0013] In one embodiment of this utility model, the sealing structure is configured as a sealing ring, and the sealing ring is coaxially arranged with the sleeve.

[0014] In one embodiment of this utility model, a pressure switch electrically connected to the controller is provided inside the sleeve.

[0015] In one embodiment of this utility model, the length of the liquid level switch is greater than the length of the sleeve.

[0016] A tank truck includes an instrument protection device for the tank truck when filling hazardous materials.

[0017] In one embodiment of the present invention, the tanker truck includes a vehicle body and a tank connected to the vehicle body. The top of the tank is provided with a plurality of root valves, and the instrument protection device is connected to any one of the root valves.

[0018] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial effects:

[0019] The instrument protection device for tank trucks filling hazardous materials as described in this utility model has a level switch whose second flange is connected to the first flange of the root valve. The level switch can be flexibly connected to or removed from the tank without moving with it, reducing the risk of damage. The level switch feeds back the liquid level in the tank to the controller, which controls the opening and closing of the filling pump. This allows for timely control of the tank liquid level, effectively preventing underfilling or overflow, and reducing safety hazards. The integrated level switch, controller, and tank valve eliminate the need for wiring, debugging, and operation, reducing the difficulty of operation. Attached Figure Description

[0020] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0021] Figure 1 This is a schematic diagram of the instrument protection device in a preferred embodiment of the present invention;

[0022] Figure 2 for Figure 1 The diagram shows the structure of the tank and root valve.

[0023] Figure 3 for Figure 1 The schematic diagram shows the structure of the sleeve, the third flange, and the fourth flange.

[0024] Figure 4 for Figure 1 The diagram shows the structure of the liquid level switch head, the fourth flange, and the second flange.

[0025] Figure 5 for Figure 1 The cross-sectional view of the sleeve and sealing structure is shown.

[0026] Explanation of the reference numerals in the accompanying drawings: 1. Tank; 2. Root valve; 3. First flange; 4. Third flange; 5. Sleeve; 6. Fourth flange; 7. Second flange; 8. Level switch head; 9. Level switch; 91. Level switch end; 10. Pressure switch; 11. First sealing ring; 12. Second sealing ring; 13. Third sealing ring. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention. Example

[0028] Reference Figure 1 , Figure 2 and Figure 4 As shown, in one embodiment of this utility model, an instrument protection device for tank trucks filling hazardous materials is disclosed, used for liquid level control of a tank 1 filled with HCl and 30% HF. A root valve 2 is provided at the top of the tank 1, which separates the interior of the tank 1 from the exterior. The root valve 2 is provided with a first flange 3. The instrument protection device includes…

[0029] Controller;

[0030] A filling pump, which is electrically connected to the controller, is used to fill the tank 1;

[0031] A level switch 9 is electrically connected to the controller. The level switch 9 is provided with a second flange 7. The level switch 9 passes vertically through the root valve 2 and its end 91 is inserted into the tank 1. The second flange 7 and the first flange 3 can be detachably connected.

[0032] The instrument protection device for tank trucks filling hazardous materials described in this embodiment has a level switch 9 whose second flange 7 is connected to the first flange 3 of the root valve 2. The level switch 9 can be flexibly connected to or removed from the tank 1 without moving with the tank 1, reducing the risk of damage. The level switch 9 feeds back the liquid level in the tank to the controller, which controls the opening and closing of the filling pump, enabling timely control of the liquid level in the tank 1 and effectively preventing insufficient filling or overflow, thus reducing safety hazards. The level switch 9, controller, and tank 1 valve are integrated into one unit and can be used directly without wiring, debugging, or operation, reducing the difficulty of operation.

[0033] In one embodiment of this utility model, the circuit connection method of the controller, the liquid level switch 9 and the filling pump, as well as the model of the controller, adopt existing technical solutions and will not be described again.

[0034] Reference Figure 1 As shown, in one embodiment of this utility model, the end 91 of the liquid level switch 9 serves as a sensing area that senses the by-products.

[0035] Reference Figure 1 and Figure 3 As shown, in one embodiment of this utility model, a sleeve 5 is further included, with a third flange 4 and a fourth flange 6 connected to its two ends respectively. The third flange 4 is connected to the first flange 3, and the fourth flange 6 is connected to the second flange 7. The sleeve 5 is sleeved on the outside of the liquid level switch 9. The sleeve 5 is used to form a sealed channel, so that the liquid level switch 9 can be safely inserted into the tank 1 while reducing the leakage of by-products. The sleeve 5 can also provide a flange transition, solving the problem of mismatch in interface and size between the first flange 3 of the root valve 2 and the second flange 7 of the liquid level switch 9.

[0036] In one embodiment of this utility model, the liquid level switch 9 is configured as a tuning fork liquid level switch, the tuning fork liquid level switch is provided with a second flange 7, the second flange 7 is fixedly connected to the fourth flange 6, the tuning fork liquid level switch has the advantages of strong anti-interference and fast response, and can also provide a standardized interface such as the second flange 7.

[0037] In one embodiment of this utility model, the diameter of the sleeve 5 is larger than the diameter of the liquid level switch 9, ensuring that the liquid level switch 9 can be freely inserted and withdrawn within the sleeve 5.

[0038] Reference Figure 5As shown, in one embodiment of this utility model, the inner wall of the sleeve 5 is provided with a sealing structure. The sealing structure cooperates with the sleeve 5 to achieve double sealing of the tank 1, reducing the risk of by-product leakage and improving safety.

[0039] Reference Figure 5 As shown, in one embodiment of this utility model, the sealing structure is composed of multiple sealing rings, which are coaxially arranged with the sleeve 5. The sealing rings are used to achieve dynamic sealing between the sleeve 5 and the liquid level switch 9, reducing leakage of by-products along the gap between the sleeve 5 and the liquid level switch 9.

[0040] Reference Figure 5 As shown, in one embodiment of the present invention, the plurality of sealing rings include a first sealing ring 11, a second sealing ring 12, and a third sealing ring 13 distributed sequentially along the length direction of the sleeve 5.

[0041] Reference Figure 1 As shown, in one embodiment of this utility model, the sleeve 5 is provided with a pressure switch 10 electrically connected to the controller. The pressure switch 10 is used to monitor the pressure in the tank 1 in real time. When the pressure rises abnormally due to material volatilization, chemical reaction or poor venting during the filling process, the filling pump can be immediately triggered to stop filling to prevent overpressure from causing the tank to rupture or by-products to overflow.

[0042] Reference Figure 1 As shown, in one embodiment of this utility model, the length of the liquid level switch 9 is greater than the length of the sleeve 5. This length difference ensures that the liquid level switch 9 can still fully contact the by-products in the tank after passing through the sleeve 5, and avoids the sleeve 5 blocking the end sensing area of ​​the liquid level switch 9.

[0043] Reference Figure 1 As shown, in one embodiment of the present invention, the liquid level switch 9 is further provided with a liquid level switch head 8, which is disposed on one side of the second flange 7. Example

[0044] A tank truck includes an instrument protection device for the tank truck when filling hazardous materials.

[0045] In one embodiment of the present invention, the tanker truck includes a vehicle body and a tank connected to the vehicle body. The vehicle body includes a vehicle chassis and a driver's cab that carry the tank 1. The tank is a container for loading by-products and is provided with at least two root valves 2 on the top. The instrument protection device is connected to one root valve 2 for detecting the liquid level in the tank; the other root valve 2 is used to input by-products into the tank.

[0046] The working principle of the instrument protection device for tank trucks filling hazardous materials described in this utility model is as follows:

[0047] After the tanker truck arrives, first connect the third flange 4 of the sleeve 5 to the first flange 3 of the root valve 2, then open the root valve 2. Next, insert the insertion sleeve 5 of the level switch 9 into the tank 1 until the fourth flange 6 abuts against the third flange 4. After the third flange 4 and the fourth flange 6 are connected, the filling pump starts filling the tank 1 with by-products. When the liquid level in the tank 1 reaches the warning height, the level switch 9 sends a signal to the controller, which controls the filling pump to stop filling. If the pressure switch 10 detects that the pressure in the tank 1 is too high, it sends a signal to the controller, which controls the filling pump to stop filling until the pressure is reduced and then filling continues. After filling is completed, remove the level switch 9 and the sleeve 5 in sequence, and finally close the root valve 2.

[0048] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A tank car filling instrument protector for hazardous materials, characterized by, For level control of a tank, the tank is equipped with a root valve at the top, the root valve has a first flange, and the instrument protection device includes... Controller; A filling pump, which is electrically connected to the controller, is used to fill the tank; A level switch is electrically connected to the controller. The level switch has a second flange. The level switch passes vertically through the root valve and its end is inserted into the tank. The second flange and the first flange can be detachably connected.

2. The instrument protection device for filling a tank truck with a hazardous material according to claim 1, characterized in that, It also includes a sleeve with a third flange and a fourth flange connected to its two ends respectively. The third flange is connected to the first flange, and the fourth flange is connected to the second flange. The sleeve is fitted over the liquid level switch.

3. The instrument protection device for filling a tank truck with a hazardous material according to claim 2, characterized in that The level switch is a tuning fork level switch, and the tuning fork level switch is provided with a second flange, which is connected to the fourth flange.

4. The instrument protection device for filling a tank truck with a hazardous material according to claim 2, characterized in that, The diameter of the sleeve is larger than the diameter of the level switch.

5. The instrument protection device for filling a tank truck with a hazardous material according to claim 2, wherein The inner wall of the sleeve is provided with a sealing structure.

6. The instrument protection device for filling a tank truck with a hazardous material according to claim 5, characterized in that The sealing structure is configured as a sealing ring, which is coaxially arranged with the sleeve.

7. The instrument protection device for filling a tank truck with a hazardous material according to claim 2, wherein The sleeve contains a pressure switch electrically connected to the controller.

8. The instrument protection device for filling a tank truck with a hazardous material according to claim 2, wherein The length of the liquid level switch is greater than the length of the sleeve.

9. A tank truck characterized in that Includes the instrument protection device for tank trucks filling hazardous materials as described in any one of claims 1-8.

10. A tank vehicle as claimed in claim 9, wherein It includes a vehicle body and a tank connected to the vehicle body. The top of the tank is provided with multiple root valves, and the instrument protection device is connected to any one of the root valves.

Images