Quick connector for filling hose of liquid nitrogen tank car

Abstract

The utility model discloses a liquid nitrogen tank car filling hose quick connector which comprises a connector, a connecting base, a first filling hose and a second filling hose, the connecting base is clamped in the connector, one end of the first filling hose and one end of the second filling hose are fixedly communicated with the connector and the connecting base respectively, and the other end of the first filling hose and one end of the second filling hose are fixedly communicated with the connecting base. And the lower portion of the connector is rotationally connected with a plurality of supporting blocks, and the tops of the supporting blocks make contact with the bottom of the connecting base. The quick connector for the filling hose of the liquid nitrogen tank car is reasonable in structural design and convenient to use, when a liquid nitrogen tank body is inflated, a clamping connection mode is adopted, quick connection can be achieved, multi-direction fixing is adopted, the stability after connection can be improved to the maximum extent, the situation of loosening and falling is avoided, and therefore the quick connector has the extremely high sealing degree, and the service life of the liquid nitrogen tank car is prolonged. Leakage is not prone to occurring during inflation, and the use requirement can be comprehensively met.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline connection, in particular to a liquid nitrogen tank truck filling hose quick connector. Background Art

[0002] Most of the existing liquid nitrogen tank truck filling hose quick connectors have the problem of not being able to connect quickly, and cannot be firmly connected after connection, resulting in easy loosening and falling off, reducing the sealing degree, and easy leakage during inflation, which is difficult to meet the needs. For this reason, we propose a liquid nitrogen tank truck filling hose quick connector to solve the problems raised in the above background technology. Utility Model Content

[0003] The purpose of the utility model is to provide a liquid nitrogen tank truck filling hose quick connector to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a liquid nitrogen tank truck filling hose quick connector, comprising a connecting head, a connecting seat, a first filling hose and a second filling hose, the connecting seat being clamped inside the connecting head, one end of the first filling hose and the second filling hose being fixedly connected to the connecting head and the connecting seat respectively, and the other ends being connected to the pump body and the liquid nitrogen tank respectively, a plurality of support blocks being rotatably connected below the connecting head, and the top of the support block being in contact with the bottom of the connecting seat.

[0005] Furthermore, at least two horizontal plates are installed around the outer side of the connecting head at equal distances, a fixed shaft is installed at the bottom of the horizontal plate, a rotating block is rotatably connected to the fixed shaft, the support block is fixedly connected to the surface of the rotating block, a locking block is slidably connected to the support block, and one end of the locking block passes through the connecting seat and is plugged into the connecting head.

[0006] Furthermore, a receiving groove is provided on the top of the support block, the locking block is slidably connected inside the receiving groove, and the bottom of the inner wall of the receiving groove is fixedly connected to the bottom of the locking block via a thrust spring.

[0007] Furthermore, a pull rod is fixedly connected to the bottom of the locking block and the inner side of the corresponding thrust spring, and the bottom end of the pull rod passes through the circular hole at the bottom of the locking block and is fixedly connected to a pull handle.

[0008] Furthermore, a positioning block is fixedly installed on the top of the connecting seat, and the positioning block is plugged into the top of the inner wall of the connecting head.

[0009] Furthermore, at least two screw sleeves are installed around the outer side of the connecting head at equal distances, the inner thread of the screw sleeve is connected to a locking screw, and the outer side of the connecting seat is provided with a locking hole adapted to the locking screw.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0011] The first and second filling hoses of the utility model are connected to the air pump and the liquid nitrogen tank at one end respectively. When the connector and the connector seat need to be connected, the connector is plugged into the outside of the connector seat, and the positioning block is used to form a preliminary positioning. At this time, the pull handle is pulled downward, and the locking block is retracted into the storage groove under the connection of the pull rod. Under the connection of the fixed shaft, the rotating block and the locking block are rotated, and the locking block is used to support and press from the bottom of the connector seat to form a secondary fixation. After the pull handle is loosened, the thrust spring pushes the locking block back to its original position, penetrates the connector seat and is inserted into The inside of the connector is screwed to further fix the connector seat. Under the threaded connection of the screw sleeve, the locking screw is rotated to insert its end into the locking hole to form the final fixation. The liquid nitrogen tank truck filling hose quick connector has a reasonable structural design and is easy to use. When inflating the liquid nitrogen tank, a card connection method is adopted to achieve quick connection, and multi-directional fixation is adopted to maximize the stability after connection, and there will be no loosening or falling off, so that it has a very high sealing degree, is not easy to leak during inflation, and can fully meet the needs of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0013] Figure 2 This is a structural cross-sectional view of the utility model;

[0014] Figure 3 This is a schematic diagram of the three-dimensional structure of the connecting seat of the utility model;

[0015] Figure 4 This is a cross-sectional view of the installation structure of the support block of the utility model.

[0016] In the figure: 1 connector, 2 connecting seat, 3 first filling hose, 4 second filling hose, 5 support block, 6 cross plate, 7 fixed shaft, 8 rotating block, 9 locking block, 10 storage groove, 11 thrust spring, 12 pull rod, 13 pull handle, 14 positioning block, 15 threaded sleeve, 16 locking screw, 17 locking hole. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] See also Figure 1-4 A liquid nitrogen tank truck filling hose quick connector includes a connector 1, a connecting seat 2, a first filling hose 3 and a second filling hose 4. The connecting seat 2 is clamped inside the connector 1. One end of the first filling hose 3 and the second filling hose 4 are fixedly connected to the connector 1 and the connecting seat 2 respectively, and the other ends are connected to the pump body and the liquid nitrogen tank respectively. Several support blocks 5 are rotatably connected to the bottom of the connector 1, and the top of the support block 5 is in contact with the bottom of the connecting seat 2.

[0019] Specifically, at least two horizontal plates 6 are installed around the outside of the connector 1 at equal distances, a fixed shaft 7 is installed at the bottom of the horizontal plate 6, a rotating block 8 is rotatably connected to the fixed shaft 7, the support block 5 is fixedly connected to the surface of the rotating block 8, and a locking block 9 is slidably connected to the support block 5, and one end of the locking block 9 passes through the connecting seat 2 and is plugged into the connector 1.

[0020] Specifically, a receiving groove 10 is provided on the top of the support block 5 , the locking block 9 is slidably connected inside the receiving groove 10 , and the bottom of the inner wall of the receiving groove 10 is fixedly connected to the bottom of the locking block 9 through a thrust spring 11 .

[0021] Specifically, a pull rod 12 is fixedly connected to the bottom of the locking block 9 and corresponds to the inner side of the thrust spring 11 , and the bottom end of the pull rod 12 passes through the circular hole at the bottom of the locking block 9 and is fixedly connected to a pull handle 13 .

[0022] Specifically, a positioning block 14 is fixedly installed on the top of the connecting seat 2, and the positioning block 14 is plugged into the top of the inner wall of the connecting head 1. The positioning block 14 can be used to make the connecting head 1 and the connecting seat 2 initially plugged in and connected, and the through hole thereon is opposite to the locking block 9, which is convenient for insertion and fixation.

[0023] Specifically, at least two screw sleeves 15 are installed around the outer side of the connector 1 at equal distances, and the inner thread of the screw sleeve 15 is connected to a locking screw 16 . The outer side of the connecting seat 2 is provided with a locking hole 17 adapted to the locking screw 16 .

[0024] The liquid nitrogen tank truck filling hose quick connector has a reasonable structural design and is easy to use. When inflating the liquid nitrogen tank, it adopts a snap-on connection method to achieve quick connection, and adopts multi-directional fixation to maximize the stability after connection, and will not loosen or fall off, thereby having extremely high sealing, not easy to leak during inflation, and can fully meet the needs of use.

[0025] During use, one end of the first filling hose 3 and the second filling hose 4 are respectively connected to the air pump and the liquid nitrogen tank. When the connector 1 and the connecting seat 2 need to be connected, the connector 1 is inserted into the outside of the connecting seat 2, and the positioning block 14 is used to form a preliminary positioning. At this time, the pull handle 13 is pulled downward, and the locking block 9 is retracted to the inside of the storage groove 10 under the connection of the pull rod 12. Under the connection of the fixed shaft 7, the rotating block 8 and the locking block 9 are rotated, and the locking block 9 is used to support and tighten from the bottom of the connecting seat 2 to form a secondary fixation. After the pull handle 13 is loosened, the thrust spring 11 pushes the locking block 9 back to its position, penetrates the connecting seat 2 and is inserted into the inside of the connector 1, thereby achieving further fixation of the connecting seat 2. Under the threaded connection of the screw sleeve 15, the locking screw 16 is rotated so that its end is inserted into the locking hole 17 to form the final fixation.

[0026] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A liquid nitrogen tank truck filling hose quick connector, comprising a connector (1), a connection seat (2), a first filling hose (3) and a second filling hose (4), characterized in that: The connecting seat (2) is clamped inside the connecting head (1); one end of the first filling hose (3) and the second filling hose (4) are fixedly connected to the connecting head (1) and the connecting seat (2), respectively; the other ends are connected to the pump body and the liquid nitrogen tank, respectively; a plurality of support blocks (5) are rotatably connected below the connecting head (1); the tops of the support blocks (5) are in contact with the bottom of the connecting seat (2).

2. The liquid nitrogen tank truck filling hose quick connector according to claim 1, characterized in that: At least two transverse plates (6) are installed around the outer side of the connector (1) at equal distances. A fixed shaft (7) is installed at the bottom of the transverse plate (6). A rotating block (8) is rotatably connected to the fixed shaft (7). The support block (5) is fixedly connected to the surface of the rotating block (8). A locking block (9) is slidably connected to the support block (5). One end of the locking block (9) passes through the connector seat (2) and is plugged into the connector (1).

3. The liquid nitrogen tank truck filling hose quick connector according to claim 2, characterized in that: The top of the support block (5) is provided with a receiving groove (10), the locking block (9) is slidably connected inside the receiving groove (10), and the bottom of the inner wall of the receiving groove (10) is fixedly connected to the bottom of the locking block (9) via a thrust spring (11).

4. The liquid nitrogen tank truck filling hose quick connector according to claim 3, characterized in that: A pull rod (12) is fixedly connected to the bottom of the locking block (9) and the inner side of the corresponding thrust spring (11); the bottom end of the pull rod (12) passes through the circular hole at the bottom of the locking block (9) and is fixedly connected to a pull handle (13).

5. The liquid nitrogen tank truck filling hose quick connector according to claim 4, characterized in that: A positioning block (14) is fixedly mounted on the top of the connecting seat (2), and the positioning block (14) is plugged into the top of the inner wall of the connecting head (1).

6. The liquid nitrogen tank truck filling hose quick connector according to claim 5, characterized in that: At least two screw sleeves (15) are equidistantly mounted around the outer side of the connector (1), the screw sleeves (15) are internally threadedly connected to a locking screw (16), and a locking hole (17) adapted to the locking screw (16) is provided on the outer side of the connector seat (2).

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