A tank truck joint

Abstract

The present invention discloses a tanker connection head, which includes a plug and a connector; the plug is connected to the tanker, a spring is arranged inside the plug, one end of the spring is connected with a valve flap, the valve flap is located inside the plug, and the valve flap abuts against the plug under the action of the spring; the connector is connected to the liquid-using equipment, one end of the plug can be placed inside the connector and be in close contact with the connector, a first telescopic pipe is connected inside the connector, and a second telescopic pipe is connected inside the first telescopic pipe; the connector is provided with a first air inlet and a second air inlet, the first telescopic pipe is provided with a third air inlet and a fourth air inlet, the connector is connected with a cleaning inlet and a cleaning outlet, the cleaning inlet and the cleaning outlet are located at a position of the connector close to the plug, one end of the first telescopic pipe is connected with a contact part, the contact part can abut against the valve flap, and a through hole is arranged at a position of the first telescopic pipe close to the contact part. The tanker connection head provided by the present invention can realize the automatic switching between the cleaning state and the liquid passing state, and has high working efficiency.

Description

Technical Field

[0001] The present application relates to the field of special connectors, and particularly to a tanker connector. Background Art

[0002] Tankers are commonly used transportation equipment for transporting chemical raw materials. Chemical raw materials often pose hazards to the human body and the environment. After some high-purity chemicals with large usage amounts are transported to the customer site by tanker, the connection connectors are exposed to the air. When unloading the vehicle, impurities are easily introduced, affecting the product purity.

[0003] Currently, the Chinese utility model patent application with the patent number CN201821490129.5 discloses a self-cleaning tanker quick connector, which includes a first connector and a second connector. A first axial channel is arranged in the first connector, and a first spring and a first valve core are arranged in the first axial channel. In the natural state of the first spring, the first valve core blocks the first axial channel; a second axial channel is arranged in the second connector, and a second spring and a second valve core are arranged in the second axial channel. In the natural state of the second spring, the second valve core blocks the second axial channel. A plurality of positioning steel balls are circumferentially arranged on the second connector, a sliding sleeve is arranged outside the positioning steel balls, a positioning ring is arranged on the outer periphery of the second connector, a spring is arranged between the positioning ring and the sliding sleeve, a first positioning groove and a second positioning groove are arranged on the outer periphery of the first connector, and a water inlet pipe and a water outlet pipe are arranged on the second connector.

[0004] Regarding the above related technologies, the inventor believes that when cleaning the connector or transporting the liquid medicine, it is necessary to manually engage the positioning groove and the steel ball, resulting in a low switching efficiency between the two states of cleaning the connector and transporting the liquid medicine, and low work efficiency. Summary of the Invention

[0005] In order to facilitate the timely cleaning of the tanker connector and improve work efficiency, the present application provides a tanker connector.

[0006] The tanker connector provided by the present application adopts the following technical solutions:

[0007] A tanker connector includes a plug and a connection head;

[0008] The plug is connected to the tanker. A spring is arranged in the plug. One end of the spring is connected to a valve flap. The valve flap is located in the plug, and the valve flap abuts against the plug under the action of the spring;

[0009] For the connection head, the connection head is connected to the liquid-using equipment. One end of the plug can be placed in the connection head and be in close contact with the connection head. A first telescopic tube is connected in the connection head, and a second telescopic tube is connected in the first telescopic tube;

[0010] The connector is provided with a first air inlet and a second air inlet, the first telescopic tube is provided with a third air inlet and a fourth air inlet, the first air inlet and the second air inlet are not connected to each other, the third air inlet and the fourth air inlet are not connected to each other, the first air inlet and the third air inlet are always connected, and the second air inlet and the fourth air inlet are always connected;

[0011] The connector is connected with a cleaning inlet and a cleaning outlet, the cleaning inlet and the cleaning outlet are located at a position of the connector close to the plug, and the first air inlet is located between the cleaning inlet and the second air inlet;

[0012] One end of the first telescopic tube is connected to a resistance portion, and the resistance portion can resist the valve flap. A through hole is formed at a position of the first telescopic tube close to the resistance portion.

[0013] By adopting the above technical solution, the plug is installed on the tank car, and the connector is installed on the liquid-using equipment. When cleaning is required, ventilation is performed through the air pump, the first air inlet and the third air inlet, the first telescopic tube and the second telescopic tube are contracted, and a cleaning chamber is formed between the abutment part and the valve cover. The through hole is closely attached to the inner wall of the first telescopic tube, and the cleaning chamber is cleaned through the cleaning inlet and the cleaning inlet;

[0014] When liquid passing is required, the first and third air inlets are stopped from being ventilated, and the second and fourth air inlets are ventilated through the air pump. Driven by the air pressure, the first and second telescopic tubes move toward the plug, the first telescopic tube contacts the plug, the second telescopic tube contacts the valve disc, the spring is compressed, and the liquid in the tank car flows into the liquid-using equipment through the plug, the through hole and the second telescopic tube. By controlling the air pump, the automatic switching between the cleaning state and the liquid passing state is realized, and the working efficiency is high. At the same time, the metal such as the spring is omitted from the connector part, which reduces the erosion of the metal by the liquid medicine, and improves the safety and purity of the liquid medicine.

[0015] Optionally, the first telescopic tube and the second telescopic tube are both composed of a resin tube and a corrugated tube, and the third air inlet and the fourth air inlet are both opened on the resin tube.

[0016] By adopting the above technical solution, the resin tube provided with the third air inlet and the fourth air inlet does not expand or contract, thereby increasing the service life of the device.

[0017] Optionally, the outer side wall of the first telescopic tube is integrally provided with a first annular sealing portion, the first annular sealing portion is located between the third air inlet and the fourth air inlet, the first annular sealing portion always contacts the inner wall of the connecting head, and the second telescopic tube is integrally provided with a second annular sealing portion, the second annular sealing portion always contacts the inner wall of the first telescopic tube, and the second annular sealing portion is always located between the third air inlet and the fourth air inlet.

[0018] By adopting the above technical solution, the phenomenon of gas leakage is avoided, and the sealing performance of the device is improved.

[0019] Optionally, an air cavity is formed between the inner wall of the first telescopic tube and the connector, and an air cavity is formed between the inner wall of the second telescopic tube and the first telescopic tube.

[0020] By adopting the above technical solution, it is convenient to control the telescopic movement of the first telescopic tube and the second telescopic tube.

[0021] Optionally, one end of the corrugated pipe in the first telescopic tube and the second telescopic tube is connected with a connecting pipe, and the connecting pipe is fixedly connected with the connector through bolts.

[0022] By adopting the above technical solution, the first telescopic tube and the second telescopic tube are kept horizontal, and at the same time, it is convenient to disassemble the first telescopic tube and the second telescopic tube.

[0023] Optionally, a third annular sealing portion is integrally provided at a position of the plug close to the connector, and the valve flap can be in contact with the third annular sealing portion.

[0024] By adopting the above technical solution, the sealing performance of the device is improved. At the same time, when the contact portion is in contact with the valve plate, there is a gap between the second telescopic tube and the inner wall of the valve flap, and the liquid medicine can enter the second telescopic tube through the through hole from the above gap.

[0025] Optionally, the spring is coated with polytetrafluoroethylene resin.

[0026] By adopting the above technical solution, the erosion of the spring by the liquid medicine is reduced, and the safety of the device and the purity of the liquid medicine are improved.

[0027] Optionally, the plug is connected to the tank truck through a flange, and the connector is connected to the liquid-using equipment through a flange.

[0028] By adopting the above technical solution, it is convenient to install the docking head.

[0029] Optionally, a fourth annular sealing portion is integrally provided on the inner wall of the first telescopic tube, and the fourth annular sealing portion is close to the third air inlet.

[0030] By adopting the above technical solution, the second annular sealing portion is in contact with the fourth annular sealing portion, avoiding the blockage of the plug by the valve flap due to the contact of the contact portion, and at the same time avoiding the blockage of the third air inlet by the second annular sealing portion, improving the stability of the device operation.

[0031] Optionally, when the second telescopic tube is compressed, the second annular sealing portion is still located between the third air inlet and the fourth air inlet, and the second telescopic tube is connected with a travel switch.

[0032] By adopting the above technical solution, the blockage of the fourth air inlet by the second annular seal is avoided, the operation stability of the device is improved, and a switch is formed to detect the movement of the second telescopic tube and whether the second telescopic tube moves after ventilation, so as to detect the overall sealing performance of the device.

[0033] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0034] In the present invention, a first air inlet, a second air inlet, a third air inlet and a fourth air inlet are provided. The plug is installed on the tank truck, and the connector is installed on the liquid-using equipment. When cleaning is required, air is introduced through the air pump, the first air inlet and the third air inlet. The first telescopic tube and the second telescopic tube contract, and a cleaning cavity is formed between the abutting part and the valve cover. The through hole is closely attached to the inner wall of the first telescopic tube, and the cleaning cavity is cleaned through the cleaning inlet and the cleaning outlet. When liquid transfer is required, the ventilation of the first air inlet and the third air inlet is stopped, and air is introduced into the second air inlet and the fourth air inlet through the air pump. Driven by the air pressure, the first telescopic tube and the second telescopic tube move towards the plug. The first telescopic tube abuts against the plug, the second telescopic tube abuts against the valve flap, and the spring is compressed. The liquid in the tank truck flows into the liquid-using equipment through the plug, the through hole and the second telescopic tube. By controlling the air pump, the automatic switching between the cleaning state and the liquid transfer state is realized, with high working efficiency. At the same time, parts of the connector omit metals such as springs, reducing the erosion of the liquid medicine on the metals, and improving the safety and the purity of the liquid medicine.

[0035] In the present invention, a first annular seal and a second annular seal are provided to avoid the phenomenon of air leakage and improve the sealing performance of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a sectional view of the cleaning state of a tank truck connector of the present invention;

[0037] Figure 2 is a sectional view of the liquid transfer state of a tank truck connector of the present invention;

[0038] Figure 3 is Figure 2 the enlarged view of part A in

[0039] In the figure: 1, plug; 2, connector; 3, spring; 4, valve flap; 5, first telescopic tube; 6, second telescopic tube; 7, first air inlet; 8, second air inlet; 9, third air inlet; 10, fourth air inlet; 11, cleaning inlet; 12, cleaning outlet; 13, abutting part; 14, through hole; 15, first annular seal; 16, second annular seal; 17, connecting pipe; 18, third annular seal; 19, fourth annular seal. DETAILED DESCRIPTION OF THE INVENTION

[0040] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0041] Referring to Figures 1 to 3 , an embodiment of a tank truck connector provided by the present invention, the tank truck connector includes a plug 1 and a connection head 2. The plug 1 is connected to the tank truck. A spring 3 is arranged in the plug 1. One end of the spring 3 is connected to a valve flap 4. The valve flap 4 is located in the plug 1. Under the action of the spring 3, the valve flap 4 abuts against the plug 1. The connection head 2 is connected to the liquid-using equipment. One end of the plug 1 can be placed in the connection head 2 and be in close contact with the connection head 2. A first telescopic tube 5 is connected in the connection head 2, and a second telescopic tube 6 is connected in the first telescopic tube 5.

[0042] The connection head 2 is provided with a first air inlet 7 and a second air inlet 8. The first telescopic tube 5 is provided with a third air inlet 9 and a fourth air inlet 10. The first air inlet 7 and the second air inlet 8 are not communicated with each other. The third air inlet 9 and the fourth air inlet 10 are not communicated with each other. The first air inlet 7 and the third air inlet 9 are always communicated. The second air inlet 8 and the fourth air inlet 10 are always communicated.

[0043] The connection head 2 is connected with a cleaning inlet 11 and a cleaning outlet 12. The cleaning inlet 11 and the cleaning outlet 12 are located at a position of the connection head 2 close to the plug 1. The first air inlet 7 is located at a position between the cleaning inlet 11 and the second air inlet 8. One end of the first telescopic tube 5 is connected with a contact part 13. The contact part 13 can abut against the valve flap 4. A through hole 14 is provided at a position of the first telescopic tube 5 close to the contact part 13.

[0044] Both the first telescopic tube 5 and the second telescopic tube 6 are composed of a resin tube and a corrugated tube. The third air inlet 9 and the fourth air inlet 10 are both provided on the resin tube. The resin tube provided with the third air inlet 9 and the fourth air inlet 10 does not expand and contract, which improves the service life of the device. The spring 3 is coated with polytetrafluoroethylene resin. The erosion of the spring 3 by the liquid medicine is reduced, which improves the safety of the device and the purity of the liquid medicine.

[0045] An outer sidewall of the first telescopic tube 5 is integrally provided with a first annular sealing portion 15. The first annular sealing portion 15 is located between the third air inlet 9 and the fourth air inlet 10, and the first annular sealing portion 15 always abuts against the inner wall of the connector 2. The second telescopic tube 6 is integrally provided with a second annular sealing portion 16, and the second annular sealing portion 16 always abuts against the inner wall of the first telescopic tube 5. The second annular sealing portion 16 is always located between the third air inlet 9 and the fourth air inlet 10. This avoids the phenomenon of air leakage and improves the sealing performance of the device.

[0046] An air cavity is formed between the inner wall of the first telescopic tube 5 and the inner wall of the connector 2, and an air cavity is formed between the inner wall of the second telescopic tube 6 and the inner wall of the first telescopic tube 5. This facilitates the control of the telescopic movement of the first telescopic tube 5 and the second telescopic tube 6.

[0047] One end of the corrugated tube in the first telescopic tube 5 and the second telescopic tube 6 is connected with a connecting pipe 17, and the connecting pipe 17 is fixedly connected with the connector 2 through bolts. This makes the first telescopic tube 5 and the second telescopic tube 6 keep horizontal, and at the same time facilitates the disassembly of the first telescopic tube 5 and the second telescopic tube 6.

[0048] The plug 1 is integrally provided with a third annular sealing portion 18 at a position close to the connector 2, and the valve flap 4 can abut against the third annular sealing portion 18. This improves the sealing performance of the device. At the same time, when the abutting portion 13 abuts against the valve plate, there is a gap between the inner wall of the second telescopic tube 6 and the valve flap 4, and the liquid medicine can enter the second telescopic tube 6 through the above gap and the through hole 14.

[0049] The plug 1 is connected to the tank truck through a flange, and the connector 2 is connected to the liquid-using equipment through a flange. This facilitates the installation of the docking head. One end of the plug 1 connected to the connector 2 is sealed by a plug when not connected, and one end of the connector 2 connected to the plug 1 is sealed by a plug when not connected.

[0050] The inner wall of the first telescopic tube 5 is integrally provided with a fourth annular sealing portion 19, and the fourth annular sealing portion 19 is close to the third air inlet 9. The second annular sealing portion abuts against the fourth annular sealing portion 19, which avoids the plugging of the plug 1 by the valve flap 4 caused by the abutment of the abutting portion 13, and at the same time avoids the blockage of the third air inlet 9 by the second annular sealing portion 16, and improves the stability of the device operation.

[0051] When the second telescopic tube 6 is compressed, the second annular sealing portion 16 is still located between the third air inlet 9 and the fourth air inlet 10. This avoids the blockage of the fourth air inlet 10 by the second annular sealing portion 16 and improves the stability of the device operation. A travel switch is connected to the outer sidewall of the resin tube of the second telescopic tube 6 to form a switch to detect the movement of the second telescopic tube 5, detect whether the second telescopic tube 6 moves after ventilation, and thus detect the overall sealing performance of the device.

[0052] Working principle:

[0053] The plug 1 is installed on the tank car, and the connector 2 is installed on the liquid-using equipment. When cleaning is required, ventilation is performed through the air pump, the first air inlet 7 and the third air inlet 9, the first telescopic tube 5 and the second telescopic tube 6 are contracted, and a cleaning chamber is formed between the abutment portion 13 and the valve cover. The through hole 14 is closely attached to the inner wall of the first telescopic tube 5, and the cleaning chamber is cleaned through the cleaning inlet 11 and the cleaning inlet 11;

[0054] When liquid passing is required, the first air inlet 7 and the third air inlet 9 are stopped from being ventilated, and the second air inlet 8 and the fourth air inlet 10 are ventilated through the air pump. Driven by the air pressure, the first telescopic tube 5 and the second telescopic tube 6 move toward the plug 1, the first telescopic tube 5 contacts the plug 1, the second telescopic tube 6 contacts the valve disc 4, the spring 3 is compressed, and the liquid in the tank car flows into the liquid-using device through the plug 1, the through hole 14 and the second telescopic tube 6. By controlling the air pump, the automatic switching between the cleaning state and the liquid passing state is realized, and the working efficiency is high. At the same time, the metal such as the spring 3 is omitted from the connector 2, which reduces the erosion of the metal by the liquid medicine, and improves the safety and purity of the liquid medicine.

[0055] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and range of equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A tank truck connector, characterized in that: It includes a plug (1) and a connector (2); The plug (1) is connected to the tank truck. A spring (3) is arranged inside the plug (1). One end of the spring (3) is connected to a valve flap (4). The valve flap (4) is located inside the plug (1). The valve flap (4) abuts against the plug (1) under the action of the spring (3); The connector (2) is connected to the liquid-using equipment. One end of the plug (1) can be placed inside the connector (2) and be in close contact with the connector (2). A first telescopic tube (5) is connected inside the connector (2), and a second telescopic tube (6) is connected inside the first telescopic tube (5); The connector (2) is provided with a first air inlet (7) and a second air inlet (8). The first telescopic tube (5) is provided with a third air inlet (9) and a fourth air inlet (10). The first air inlet (7) and the second air inlet (8) are not communicated with each other. The third air inlet (9) and the fourth air inlet (10) are not communicated with each other. The first air inlet (7) and the third air inlet (9) are always communicated. The second air inlet (8) and the fourth air inlet (10) are always communicated; The connector (2) is connected with a cleaning inlet (11) and a cleaning outlet (12). The cleaning inlet (11) and the cleaning outlet (12) are located at a position of the connector (2) close to the plug (1). The first air inlet (7) is located at a position between the cleaning inlet (11) and the second air inlet (8); One end of the first telescopic tube (5) is connected with a contact part (13). The contact part (13) can abut against the valve flap (4). A through hole (14) is provided at a position of the first telescopic tube (5) close to the contact part (13); A first annular sealing part (15) is integrally arranged on the outer side wall of the first telescopic tube (5). The first annular sealing part (15) is located between the third air inlet (9) and the fourth air inlet (10). The first annular sealing part (15) always abuts against the inner wall of the connector (2). A second annular sealing part (16) is integrally arranged on the second telescopic tube (6). The second annular sealing part (16) always abuts against the inner wall of the first telescopic tube (5). The second annular sealing part (16) is always located at a position between the third air inlet (9) and the fourth air inlet (10); An air cavity is formed between the inner wall of the first telescopic tube (5) and the connector (2). An air cavity is formed between the inner wall of the second telescopic tube (6) and the first telescopic tube (5).

2. The tanker connection according to claim 1, characterized in that: Both the first telescopic tube (5) and the second telescopic tube (6) are composed of a resin tube and a corrugated tube. The third air inlet (9) and the fourth air inlet (10) are both provided on the resin tube.

3. The tank truck connector according to claim 1, wherein: One ends of the corrugated tubes of the first telescopic tube (5) and the second telescopic tube (6) are both connected with a connecting pipe (17). The connecting pipe (17) is fixedly connected to the connector (2) through bolts.

4. The tanker coupling according to claim 1, wherein: A third annular sealing part (18) is integrally arranged at a position of the plug (1) close to the connector (2). The valve flap (4) can abut against the third annular sealing part (18).

5. The tank car connector according to claim 1, characterized in that: The spring (3) is coated with polytetrafluoroethylene resin.

6. The tank car connector according to claim 1, characterized in that: The plug (1) is connected to the tank truck through a flange, and the connector (2) is connected to the liquid-using equipment through a flange.

7. The tanker connector according to claim 1, characterized in that: The inner wall of the first telescopic pipe (5) is integrally provided with a fourth annular sealing portion (19), and the fourth annular sealing portion (19) is close to the third air inlet (9).

8. The tank truck connector according to claim 7, characterized in that: When the second telescopic pipe (6) is compressed, the second annular sealing portion (16) is still located between the third air inlet (9) and the fourth air inlet (10), and the second telescopic pipe (6) is connected with a travel switch.

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