VOCs recovery connecting device with liquid level monitoring function

Abstract

The application discloses a VOCs recovery connecting device with liquid level monitoring function, and belongs to the technical field of connecting devices.The VOCs recovery connecting device comprises a crane pipe, the crane pipe is composed of a liquid-phase arm and a gas-phase arm, a tank car tank body is arranged on the lower side of the crane pipe, a connector male end is arranged on the tank car tank body, a tank car valve is arranged on the connector male end, a connecting device is arranged on the gas-phase arm, the connecting device comprises a sealing cylinder, a signal cable is arranged on one end of a piston probe rod, a liquid level detection probe is arranged on the piston probe rod, a piston assembly is arranged on the piston probe rod, a connecting assembly is arranged at the bottom of the sealing cylinder, and the connecting assembly is connected with the gas-phase arm.The connecting device is connected with the tank car tank body, the tank car valve is opened, the liquid level detection probe is lowered into the tank car tank body through operation, and the liquid level detection probe detects and controls petroleum loading, so that the technical problems that the tank car is inconvenient to be modified and installed with a liquid level switch and VOCs are prone to volatilize and leak during VOCs gas recovery monitoring of a liquid level of an existing device are solved.

Description

Technical Field

[0001] This invention belongs to the field of connection device technology, and specifically relates to a VOCs recovery connection device with liquid level monitoring function. Background Technology

[0002] Tank trucks are essential tools for transporting liquid materials by road, widely used in the transportation of petroleum, chemicals, and liquid food products. The transportation process involves loading and unloading materials. Currently, most tank trucks use top-loading arms, commonly known as loading arms, which generally consist of a liquid phase arm and a gas phase arm. The liquid phase arm is responsible for loading liquid materials from storage tanks into the tank truck, while the gas phase arm is responsible for collecting toxic, harmful, flammable, and explosive gases from the tank truck and introducing them into the on-site VOCs system for treatment. For some highly toxic, easily vaporized and explosive, or pressure-filled materials, such as ethylene oxide, liquid chlorine, dichloroethane, and hydrogen fluoride, a completely sealed filling process is required. Tank trucks carrying these materials are equipped with both gas and liquid phase interfaces on the top of the tank truck, typically flange interfaces or quick-connect male connectors, and are equipped with on / off valves.

[0003] The loading volume of materials is generally quantitatively controlled by on-site flow meters. In some places, personnel even periodically visually observe the tank level gauge to determine the loading volume, and then manually operate the loading pump and valves. However, if there are problems with the loading volume, such as a malfunctioning or inaccurate flow meter or level gauge, or human negligence, it may lead to overflow, which is extremely dangerous. Current technology involves installing a level detection switch on the tanker, but this requires modification of the tanker. Tankers are often imported vehicles, and different manufacturers produce them with inconsistent standards and models, making modification difficult for many. Some systems use an additional level gauge inserted into the tanker to detect the level, but this requires opening the valve on the top of the tanker before inserting the level gauge probe. This process carries the risk of VOCs (volatile organic compounds) evaporation and leakage, causing air pollution. Summary of the Invention

[0004] Purpose of the invention: The purpose of this invention is to provide a VOCs recovery connection device with liquid level monitoring function, so as to solve the technical problems of inconvenience in modifying tank trucks to install liquid level switches and the easy volatilization and leakage of VOCs when monitoring liquid level in VOCs gas recovery.

[0005] A VOCs recovery connection device with liquid level monitoring function includes an loading arm, which consists of a liquid phase arm and a gas phase arm. A tanker body is located on the lower side of the loading arm. The tanker body has a male connector end, and a tanker valve is located on the male connector end. During loading, the liquid phase arm connects to the tanker body, and oil enters the tanker body through the liquid phase arm. The device is characterized by a connection device on the gas phase arm, which includes a sealed cylinder. The sealed cylinder has a pneumatically controlled reversing valve, which has two gas pipes. A throttling valve and a throttling valve are respectively located at the upper and lower parts of the sealed cylinder. The first gas pipe is connected to the first throttling valve, and the second gas pipe is connected to the second throttling valve. An electromagnetic sensor and an electromagnetic sensor are located from top to bottom on the sealed cylinder. A sealing valve is located inside the sealed cylinder. The system comprises two components: a first component and a second sealing component. Each component contains a piston probe rod with a signal cable at one end and a liquid level detection probe mounted on it. A piston assembly is also mounted on the piston probe rod. A connecting assembly is located at the bottom of the sealing cylinder, connecting to both the gas phase arm and the tanker body. Compressed gas enters the second gas pipe from the pneumatic control valve, then passes through the second throttle valve into the upper cavity of the piston assembly. This causes the piston assembly to move the piston probe rod downwards, opening the tanker valve and allowing the liquid level detection probe to enter the tanker body. When compressed air passes through the first gas pipe and the first throttle valve into the lower cavity of the piston assembly, the piston assembly moves the piston probe rod upwards. The first and second throttle valves also control the speed at which the piston probe rod rises and falls.

[0006] Furthermore, the sealing assembly includes a rear plug, and inside the rear plug, from top to bottom, are arranged a dustproof ring, a shaft sealing ring, and a guide ring. The piston probe rod passes through the dustproof ring, the shaft sealing ring, and the guide ring. The bottom of the rear plug is provided with a sealing ring. The dustproof ring is used to prevent dust inside the sealing cylinder, and the guide ring is used to guide the piston probe rod. The rear plug, the sealing ring, the shaft sealing ring, and the sealing ring are used to seal the upper and lower cavities of the sealing assembly, facilitating the injection of compressed air.

[0007] Furthermore, the second sealing assembly includes a front plug, inside which a second guide ring, a second shaft sealing ring, and a second dustproof ring are arranged sequentially from top to bottom. The piston probe rod passes through the second guide ring, the second shaft sealing ring, and the second dustproof ring. The upper part of the front plug is provided with the second sealing ring. The second dustproof ring is used to prevent dust inside the sealing cylinder, and the second guide ring is used to guide the piston probe rod. The front plug, the second sealing ring, the second shaft sealing ring, and the second sealing ring are used to seal the upper and lower cavities of the sealing assembly, facilitating the injection of compressed air.

[0008] Furthermore, the piston assembly includes a piston, and a piston sealing ring is provided between the piston and the inner wall of the sealing cylinder. The piston sealing ring is used for sealing between the piston and the inner wall of the sealing cylinder. A soft magnetic ring is provided between the piston and the inner wall of the sealing cylinder. The soft magnetic ring moves with the movement of the piston. When the soft magnetic ring contacts electromagnetic sensor one, electromagnetic sensor one sends a signal indicating that the liquid level probe has been inserted into place to the loading system, indicating that loading can proceed. When the soft magnetic ring contacts electromagnetic sensor two, it indicates that the tanker valve can be closed and the connection can be disconnected, thus detaching the liquid phase and gas phase interfaces from the tanker.

[0009] Furthermore, the connecting assembly includes a tee pipe with a bend and a connection port connected to the gas phase arm. A reducing connector is located at the bottom of the tee pipe, with a female connector end and a locking lever. The female connector end connects to the male connector end on the tanker body and is locked using the locking lever. The connection port connects to the gas phase pipe, allowing VOCs gas inside the tanker body to enter the gas phase arm and be recovered.

[0010] Furthermore, a sealing ring is provided between the reducing connector and the female end of the connector to enhance the sealing performance between the reducing connector and the female end of the connector.

[0011] Compared with the prior art, the present invention has the following advantages:

[0012] When recovering VOCs, the gas phase arm first seals its connection to the male end of the tanker's connector via a connecting assembly. Then, the piston probe rod drives the liquid level detection probe into the tanker. The signal is fed back to the control system, which instructs the liquid phase arm to deliver oil into the tanker. When the oil level in the tanker contacts the liquid level detection probe, the signal is fed back to stop loading. This invention requires no modification to the tanker and is applicable to all types of tankers. Under sealed conditions, the piston probe rod drives the liquid level detection probe into the tanker, preventing VOCs leakage. Loading and VOCs recovery are fast, and VOCs recovery is more accurate.

[0013] The gas phase arm, piston probe rod, and liquid level detection probe share the male end of a connector on a tank truck, eliminating the need for additional connectors on the tank truck.

[0014] This avoids both the overflow of the tanker truck and the backflow of oil from the tanker truck during an overflow, which would otherwise enter the VOCs recovery system along with VOCs through the vapor phase arm, wasting oil and hindering VOCs recovery. Attached Figure Description

[0015] Figure 1 This is a structural diagram of the present invention;

[0016] Figure 2 The connecting device of the present invention is three-dimensional. Figure 1 ;

[0017] Figure 3 The connecting device of the present invention is three-dimensional. Figure 2 ;

[0018] Figure 4 This is a structural diagram of the connection device of the present invention;

[0019] Figure 5 This is the present invention. Figure 4 A magnified view of a portion at point a;

[0020] Figure 6 This is the present invention. Figure 4 A magnified view of part b;

[0021] Figure 7 This is a diagram showing the state of the connecting device of the present invention before it is connected to the tanker body;

[0022] Figure 8 This is a diagram showing the working state of the connecting device of the present invention after it is connected to the tank truck body;

[0023] Figure 9 This is a diagram showing the connection device of the present invention after the tanker is loaded onto the tanker truck.

[0024] Attached Figures: 1 Loading arm, 2 Liquid phase arm, 3 Gas phase arm, 4 Tank truck body, 5 Male connector, 6 Tank truck valve, 7 Sealing cylinder, 8 Pneumatic control directional valve, 9 Gas pipe one, 10 Gas pipe two, 11 Throttle valve two, 12 Throttle valve one, 13 Electromagnetic sensor one, 14 Electromagnetic sensor two, 15 Piston probe rod, 16 Signal cable, 17 Liquid level detection probe, 18 Rear plug, 19 Dustproof ring one, 20 Shaft seal one, 21 Guide ring one, 22 Seal ring one, 23 Front plug, 24 Guide ring two, 25 Shaft seal two, 26 Dustproof ring two, 27 Seal ring two, 28 Piston, 29 Piston seal ring, 30 Soft magnetic ring, 31 T-joint, 32 Bend, 33 Connection port, 34 Reducing connector, 35 Female connector, 36 Locking lever, 37 Seal ring three. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0026] In the description of the invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] Example

[0028] like Figure 1-9 As shown:

[0029] A VOCs recovery connection device with liquid level monitoring function includes an loading arm 1, which consists of a liquid phase arm 2 and a gas phase arm 3. A tanker truck body 4 is located on the lower side of the loading arm 1. A male connector 5 is located on the tanker truck body 4, and a tanker truck valve 6 is located on the male connector 5. The device is characterized in that a connection device is provided on the gas phase arm 3, the connection device including a sealing cylinder 7. A pneumatically controlled reversing valve 8 is provided on the sealing cylinder 7. A first gas pipe 9 and a second gas pipe 10 are provided on the pneumatically controlled reversing valve 8. A second throttle valve 11 and a first throttle valve 12 are respectively provided on the upper and lower parts of the sealing cylinder 7. Gas pipe 9 is connected to throttle valve 12, and gas pipe 10 is connected to throttle valve 11. The sealed cylinder 7 is equipped with electromagnetic sensor 13 and electromagnetic sensor 14 from top to bottom. The sealed cylinder 7 is equipped with sealing assembly 1 and sealing assembly 2. The sealing assembly 1 and sealing assembly 2 are equipped with piston probe rod 15. One end of the piston probe rod 15 is equipped with signal cable 16. The piston probe rod 15 is equipped with liquid level detection probe 17. The piston probe rod 15 is equipped with piston assembly. The bottom of the sealed cylinder 7 is equipped with connecting assembly, which is connected to gas phase arm 3.

[0030] Furthermore, the sealing assembly includes a rear plug 18, in which a dustproof ring 19, a shaft sealing ring 20, and a guide ring 21 are arranged sequentially from top to bottom. The piston probe rod 15 passes through the dustproof ring 19, the shaft sealing ring 20, and the guide ring 21. A sealing ring 22 is provided at the bottom of the rear plug 18.

[0031] Furthermore, the second sealing assembly includes a front plug 23, in which a second guide ring 24, a second shaft sealing ring 25, and a second dustproof ring 26 are arranged sequentially from top to bottom. The piston probe rod 15 passes through the second guide ring 24, the second shaft sealing ring 25, and the second dustproof ring 26. A second sealing ring 27 is provided on the upper part of the front plug 23.

[0032] Furthermore, the piston assembly includes a piston 28, a piston sealing ring 29 is provided between the piston 28 and the inner wall of the sealing cylinder 7, and a soft magnetic ring 30 is provided between the piston 28 and the inner wall of the sealing cylinder 7.

[0033] Furthermore, the connecting assembly includes a tee pipe 31, a bend pipe 32 on the tee pipe 31, a connection port 33 on the bend pipe 32, the connection port 33 being connected to the gas phase arm 3, a reducing connector 34 at the bottom of the tee pipe 31, a female connector end 35 on the reducing connector 34, and a locking lever 36 on the female connector end 35.

[0034] Furthermore, a sealing ring 37 is provided between the reducing connector 34 and the female connector 35.

[0035] The method of using this invention is as follows:

[0036] Connect the bend 32 and the gas phase arm 3 through the connection port 33, connect the male end 5 of the connector 35 of the tanker body 4 to the female end 35 of the connector, and lock them with the locking lever 36. Open the tanker valve 6, and the compressed gas enters the second gas pipe 10 through the pneumatic control reversing valve 8, and enters the upper cavity of the piston 28 through the second throttle valve 11. Under the action of the compressed air, the piston 28 drives the piston probe rod 15 and the liquid level detection probe 17 to move downwards, and enter the tanker body 4 through the male end 5 of the connector. At the same time, the soft magnetic ring 30 moves to the position of the second electromagnetic sensor 14 under the drive of the piston 28, and the liquid level detection probe 17 is inserted into place. The signal is fed back to the loading system to notify that loading can be carried out. The liquid phase arm 2 loads the oil into the tanker body 4.

[0037] VOCs gas inside the tanker 4 enters the tee pipe 31 through the gap between the male end of the connector 5 and the piston probe rod 15, and then enters the gas phase arm 3 through the bend pipe 32, and enters the oil and gas recovery system to realize the recovery of VOCs gas. When the oil level inside the tanker 4 comes into contact with the liquid level detection probe 17, a signal is fed back to notify the truck to stop loading.

[0038] After loading is completed, operate the pneumatic reversing valve 8. Compressed air enters the air pipe 9 from the pneumatic reversing valve 8, and enters the lower cavity of the piston 28 through the throttle valve 12. Under the action of the compressed air, the piston 28 drives the piston probe rod 15 and the liquid level detection probe 17 to move upward. At the same time, the soft magnetic ring 30 moves to the position of the electromagnetic sensor 13 under the action of the piston 28. The pneumatic reversing valve 8 is closed. At this time, the tanker valve 6 is closed, and the liquid phase arm 2 and the gas phase arm 3 are separated from the tanker tank body 4.

[0039] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of the present invention, and these improvements should also be considered within the scope of protection of the present invention.

Claims

1. A VOCs recovery connection device with liquid level monitoring function, comprising an loading arm (1), the loading arm (1) being composed of a liquid phase arm (2) and a gas phase arm (3), a tanker body (4) being provided on the lower side of the loading arm (1), a connector male end (5) being provided on the tanker body (4), and a tanker valve (6) being provided on the connector male end (5), characterized in that, The gas phase arm (3) is provided with a connecting device, which includes a sealing cylinder (7). The sealing cylinder (7) is provided with a pneumatically controlled reversing valve (8). The pneumatically controlled reversing valve (8) is provided with a first gas pipe (9) and a second gas pipe (10). The upper and lower parts of the sealing cylinder (7) are respectively provided with a second throttle valve (11) and a first throttle valve (12). The first gas pipe (9) is connected to the first throttle valve (12), and the second gas pipe (10) is connected to the second throttle valve (11). The sealing cylinder (7) is provided with an electric... A magnetic sensor (13) and an electromagnetic sensor (14) are provided. A sealing assembly (1) and a sealing assembly (2) are provided inside the sealed cylinder (7). A piston probe rod (15) is provided inside the sealing assembly (1) and the sealing assembly (2). A signal cable (16) is provided at one end of the piston probe rod (15). A liquid level detection probe (17) is provided on the piston probe rod (15). A piston assembly is provided on the piston probe rod (15). A connecting assembly is provided at the bottom of the sealed cylinder (7). The connecting assembly is connected to the gas phase arm (3). The piston assembly includes a piston (28), a piston sealing ring (29) is provided between the piston (28) and the inner wall of the sealing cylinder (7), and a soft magnetic ring (30) is provided between the piston (28) and the inner wall of the sealing cylinder (7).

2. The VOCs recovery connection device with liquid level monitoring function according to claim 1, characterized in that, The sealing assembly includes a rear plug (18), and the rear plug (18) is provided with a dustproof ring (19), a shaft seal ring (20) and a guide ring (21) from top to bottom. The piston probe rod (15) passes through the dustproof ring (19), the shaft seal ring (20) and the guide ring (21). The bottom of the rear plug (18) is provided with a seal ring (22).

3. The VOCs recovery connection device with liquid level monitoring function according to claim 2, characterized in that, The sealing assembly 2 includes a front plug (23), and the front plug (23) is provided with a guide ring 2 (24), a shaft sealing ring 2 (25) and a dustproof ring 2 (26) from top to bottom. The piston probe rod (15) passes through the guide ring 2 (24), the shaft sealing ring 2 (25) and the dustproof ring 2 (26). The upper part of the front plug (23) is provided with a sealing ring 2 (27).

4. The VOCs recovery connection device with liquid level monitoring function according to claim 3, characterized in that, The connecting assembly includes a three-way pipe (31), a bend (32) on the three-way pipe (31), a connection port (33) on the bend (32), the connection port (33) being connected to the gas phase arm (3), a reducing connector (34) at the bottom of the three-way pipe (31), a female connector (35) on the reducing connector (34), and a locking lever (36) on the female connector (35).

5. The VOCs recovery connection device with liquid level monitoring function according to claim 4, characterized in that, A sealing ring (37) is provided between the reducing connector (34) and the female end of the connector (35).

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