Multifunctional anti-leakage device for dangerous chemical loading

Abstract

The utility model relates to crane pipe equipment technical field, and disclose a kind of multifunctional crane pipe leak-proof device for dangerous chemical loading, including tail end connection crane pipe and itself access the outlet pipe in the interior of tank truck, the outlet pipe outer surface is also connected with conical sealing cap, the flange upper portion is provided with travel switch, the outlet pipe tail end and located conical sealing cap below still install the liquid level switch for closing crane pipe filling gas-liquid. The utility model connects outlet pipe on crane pipe system, by using the butt joint structure of crane pipe system, outlet pipe is inserted into the tank mouth of tank truck, travel switch is touched when outlet pipe is lowered in place, position crane pipe starts filling, liquid level switch set in the suitable position of outlet pipe end starts to take effect, when dangerous chemical liquid level rises and triggers liquid level switch, crane pipe system will emergency cut off outlet valve, effectively prevent leakage, reach the beneficial effect of avoiding dangerous chemical in loading process appear tank, toxic gas overflow.

Description

Technical Field

[0001] This utility model relates to the field of loading arm equipment technology, specifically a multi-functional anti-leakage device for loading hazardous chemicals. Background Technology

[0002] Tanker trucks are widely used for loading and unloading hazardous chemicals in the market. Loading of hazardous chemicals often involves the use of loading arms. In the early days of the market, loading arms were mostly done manually. Manual loading has problems such as laborious operation, low safety guarantee, and lack of environmental protection measures. As the country and enterprises attach increasing importance to safety and environmental protection, electric and intelligent loading arms have emerged to solve the above problems. For example, a remote intelligent rocker arm loading control system with publication number CN 113325765 B discloses in paragraph 0030 that "a rotary motor controls the rotary rod to deflect, thereby controlling the clamp at the bottom of the rotary rod to drive the second guide tube to deflect, so as to accurately insert the vertical tube into the filling inlet."

[0003] Since existing loading arms are already unmanned during actual loading and docking, there are more safety monitoring requirements for actual loading. For example, intelligent loading arm systems may experience overflow or gas leakage due to the inherent data latency of the network during continuous filling when loading liquid or gas. Although data latency can be reduced by improving the network or using data cables to connect sensors, there is always the possibility of delay due to weather or other factors. This requires adjustments to the structure of the loading arm itself to ensure that it will not overflow even in the event of network latency. Utility Model Content

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides a multi-functional loading arm leak-proof device for loading hazardous chemicals, which has the advantages of preventing overflow and toxic gas spillage during the loading process, thus solving the aforementioned technical problems.

[0005] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: a multi-functional loading arm leak-proof device for loading hazardous chemicals, comprising an outlet pipe whose tail end is connected to the loading arm and whose front end is connected to the inside of the tanker truck, a conical sealing cap connected to the outer surface of the outlet pipe, the conical sealing cap having an opening and sealingly connecting a negative pressure pipe driven by a negative pressure device inside the opening, a flange dividing the entire outlet pipe in two above the conical sealing cap, a limit switch located above the flange at one end of the outlet pipe near the loading arm, and a level switch for shutting off the gas-liquid filling of the loading arm installed at the tail end of the outlet pipe below the conical sealing cap.

[0006] Preferably, the flange is a loose flange, and the conical sealing cap and the outlet pipe are connected using a telescopic connection.

[0007] Preferably, the telescopic connection between the conical sealing cap and the outlet pipe specifically involves the front end and rear end of the outlet pipe connected to the conical sealing cap moving up and down under the flange connection.

[0008] Preferably, the outlet pipe is inserted into the inlet of the tank truck, and the opening below the conical sealing cap is used to cover the tank truck.

[0009] Preferably, the level switch is a tuning fork switch.

[0010] Preferably, the outlet pipe and the conical sealing cap are made of tetrafluoroethylene (PTFE).

[0011] Compared with the prior art, this utility model provides a multi-functional anti-leakage device for loading hazardous chemicals onto trucks, which has the following beneficial effects: 1. This utility model connects the outlet pipe to the loading arm system, and inserts the outlet pipe into the tank opening of the tanker truck using the docking structure of the loading arm system. When the outlet pipe descends to the correct position, a limit switch is triggered. After the limit switch is confirmed to be open, a vacuum is drawn on the conical sealing cap, thereby effectively ensuring that the conical sealing cap is tightly attached to the surface of the outlet pipe to form a sealing layer covering the tank opening of the tanker truck and the connection between the outlet pipe and the limit switch. The loading arm begins filling after the limit switch confirms that the insertion is in place. The liquid level switch set at an appropriate position at the end of the outlet pipe becomes active. When the liquid level of the hazardous chemical rises and triggers the liquid level switch, the loading arm system will urgently shut off the outlet valve, effectively preventing leakage and achieving the beneficial effect of avoiding overflow of the tank and spillage of toxic gases during the loading of hazardous chemicals. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a side view of the overall structure of this utility model; Figure 3 This is a schematic diagram of the conical sealing cap structure of this utility model; Figure 4 This is a schematic diagram of the outlet pipe structure of this utility model.

[0013] The components include: 1. Outlet pipe; 2. Conical sealing cap; 3. Negative pressure pipe; 4. Flange; 5. Limit switch; 6. Liquid level switch. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1-4 A multi-functional anti-leakage device for loading hazardous chemicals includes an outlet pipe 1 connected to the loading arm at its tail end and inserted into the tanker truck at its front end. A conical sealing cap 2 is also connected to the outer surface of the outlet pipe 1. The surface of the conical sealing cap 2 is open and sealed inside the opening to a negative pressure pipe 3 driven by a negative pressure device. A flange 4 is provided above the conical sealing cap 2, dividing the entire outlet pipe 1 into two parts. A limit switch 5 is provided near the end of the outlet pipe 1 close to the loading arm and above the flange 4 to confirm whether the outlet pipe 1 is inserted in place. A liquid level switch 6 is also installed at the tail end of the outlet pipe 1 and below the conical sealing cap 2 to shut off the gas and liquid filling of the loading arm.

[0016] Furthermore, the telescopic sleeve connection between the conical sealing cap 2 and the outlet pipe 1 is used for self-protection, preventing overload of the motor used for propulsion on the loading arm system and damage to the outlet pipe 1 during the distance between the outlet pipe 1 being in position and the triggering of the position switch.

[0017] Furthermore, the entire device, except for the limit switch 5, the level switch 6, and the flange 4, is made of PTFE material to ensure its corrosion resistance, and the flange is a loose flange.

[0018] Further, please refer to the appendix to the instruction manual. Figure 1-2 The outlet pipe and the conical sealing cap are welded together at the connection point. The flange 4 installed above the conical sealing cap 2 is sealed to the outlet pipe 1. The conical sealing cap and the outlet pipe are retractably connected by utilizing the expandable feature of the loose flange sleeve.

[0019] Furthermore, the outlet pipe 1 has a diameter of DN125, and the conical sealing cap has a large opening diameter of 560mm and a small opening diameter of 240mm. The large opening of the sealing cap can completely cover the tanker.

[0020] Furthermore, the level switch 6 is used to interlock the emergency shut-off valve. The level switch 6 is a float-type level switch, which is existing technology, such as the technology disclosed in CN105841779B. This application only repurposes the switch, rather than making structural improvements to the switch. Therefore, only its use is disclosed and its operating principle is not disclosed in detail.

[0021] Furthermore, the limit switch 5 installed above the outlet pipe 1 is located above the flange 4 connection. When the outlet pipe 1 descends into position within 2 cm inside the tank opening of the tank truck, the limit switch is triggered.

[0022] Furthermore, by adding a conical sealing cap to the outlet pipe 1 to cover the tank of the tanker, and then opening the conical sealing cap to connect the negative pressure pipe 3, which is connected to a negative pressure fan or other negative pressure device, and after the limit switch 5 of the outlet pipe 1 is determined to be open, the conical sealing cap 2 is evacuated, thereby effectively ensuring that the conical sealing cap 2 is tightly attached to the surface of the outlet pipe 1 to form a sealing layer covering the tank opening of the tanker and the connection of the outlet pipe 1, effectively preventing leakage.

[0023] In use, after connecting the outlet pipe 1 to the loading arm system, the outlet pipe 1 is inserted into the tank opening of the tanker truck using the docking structure of the loading arm system. The specific insertion method of the loading arm has been disclosed in the background art documents of this application, therefore this application will not elaborate further. As the outlet pipe is inserted into the tanker truck, the limit switch 5 is triggered when the outlet pipe descends to its final position. At this time, the limit switch 5 confirms that the insertion is complete, and the loading arm system can then fill it with gas and liquid. The specific limit switch is also prior art; its operating principle has been disclosed in the existing patent with publication number CN223118140U. This application does not make any structural improvements to the limit switch; therefore, its use is only briefly described. As the loading arm begins filling, the level switch 6, located at a suitable position at the end of the outlet pipe, becomes active. When the hazardous chemical level rises and triggers the level switch 6, the loading arm system will urgently shut off the outlet valve. A conical sealing cap is added to the outlet pipe 1 to cover the tanker. An opening is then made in the conical sealing cap to connect to the negative pressure pipe 3. The negative pressure pipe 3 is connected to a negative pressure fan or other negative pressure device. After the limit switch 5 of the outlet pipe 1 is confirmed to be open, a vacuum is drawn on the conical sealing cap 2, thereby effectively ensuring that the conical sealing cap 2 is tightly fitted to the surface of the outlet pipe 1 to form a sealing layer covering the tanker opening and the connection between the outlet pipe 1 and the tanker, effectively preventing leakage.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-functional loading arm leak-proof device for loading hazardous chemicals, comprising an outlet pipe (1) whose tail end is connected to the loading arm and whose front end is connected to the inside of the tank truck, characterized in that: The outer surface of the front end of the outlet pipe (1) is also connected to a conical sealing cap (2). The surface of the conical sealing cap (2) is open and sealed inside the opening to connect to a negative pressure pipe (3) driven by a negative pressure device. A flange (4) is provided above the conical sealing cap (2) to divide the entire outlet pipe (1) into two. A limit switch (5) is provided at one end of the outlet pipe (1) near the loading arm and above the flange (4). A liquid level switch (6) for closing the loading arm for filling gas and liquid is also installed at the tail end of the outlet pipe (1) and below the conical sealing cap (2).

2. The multi-functional loading arm leak-proof device for loading hazardous chemicals according to claim 1, characterized in that: The flange (4) is a loose flange, and the conical sealing cap (2) and the outlet pipe (1) are connected by a telescopic connection.

3. A multi-functional loading arm leak-proof device for loading hazardous chemicals according to claim 2, characterized in that: The telescopic connection between the conical sealing cap (2) and the outlet pipe (1) is specifically that the front end of the outlet pipe (1) connected to the conical sealing cap (2) and the rear end of the outlet pipe (1) move up and down under the connection of the flange (4).

4. A multi-functional loading arm leak-proof device for loading hazardous chemicals according to claim 1, characterized in that: The outlet pipe (1) is inserted into the inlet of the tank truck, and the opening below the conical sealing cap (2) is used to cover the tank truck.

5. A multi-functional loading arm leak-proof device for loading hazardous chemicals according to claim 1, characterized in that: The liquid level switch (6) is a tuning fork switch.

6. A multi-functional loading arm leak-proof device for loading hazardous chemicals according to claim 1, characterized in that: The outlet pipe (1) and the conical sealing cap (2) are made of tetrafluoroethylene.

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