Quick coupling for tank car

Abstract

The utility model belongs to the field of fluid loading and unloading special equipment, and relates to a tank car quick connector which comprises an external thread sleeve, an internal thread sleeve, a hand wheel, a connecting rod mechanism, two clamping jaws and a loose flange. During butt joint, the connecting rod mechanism is pulled backwards, the abutting block of the connecting rod mechanism is opened towards the outer side, the clamping jaw connected with the abutting block is opened, the tank car quick connector is pushed to be close to the tank car interface flange, the connecting rod mechanism is loosened, and the clamping jaw is folded; the hand wheel is rotated clockwise to drive the external thread sleeve to rotate clockwise, the internal thread sleeve moves in the direction close to the hand wheel through thread transmission, the clamping jaw is driven to move backwards, and the clamping jaw and the tank car interface flange are tightened. The quick butt joint of the tank car quick connector and the tank car interface flange is achieved in a hand wheel transmission mode, the butt joint precision and the sealing tightness are improved, the connecting rod mechanism is adopted to be connected with the clamping jaws, opening and closing of the clamping jaws can be achieved, and the tank car quick connector and the tank car interface flange can be aligned and fixed conveniently.

Description

Technical Field

[0001] This utility model belongs to the field of special equipment for fluid loading and unloading, and relates to a quick connector for tank trucks. Background Technology

[0002] Loading and unloading booms are mainly used for loading and unloading fluids at ambient or cryogenic temperatures in the petrochemical industry. Currently, the loading and unloading boom is connected to the tank truck via flanges bolted together. The flange at the end of the loading and unloading boom is a loose flange, while the interface flange at the rear of the tank truck is a fixed standard flange. When the two flanges are tightened with four bolts, a gasket in the middle of the flange is pressed to achieve a sealed connection for fluid loading and unloading. The existing loose flange connection requires tightening four bolts, which hinders quick assembly and disassembly, resulting in low work efficiency. Repeated disassembly and reassembly of the loose flange may cause flange deformation, making it difficult to connect the flanges. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a quick connector for tank trucks that is easy to connect, simple to operate, and has good sealing performance.

[0004] The technical solution adopted by this utility model to solve the technical problem is:

[0005] This utility model provides a quick connector for tank trucks, comprising: an external threaded sleeve, an internal threaded sleeve, a handwheel, a linkage mechanism, two jaws, and a loose flange. The external threaded sleeve has an external thread on its outer ring; the internal threaded sleeve has an internal thread on its inner ring, and the internal threaded sleeve is connected to the external thread of the external threaded sleeve via the internal thread, and is installed on the outer wall of the external threaded sleeve; the handwheel is nested on the outer wall of the external threaded sleeve and located behind the internal threaded sleeve; the linkage mechanism includes a linkage sliding groove, a sliding connecting rod, a handheld rod, and two pressing blocks. The linkage sliding groove is installed on the outer wall of the internal threaded sleeve, and the handheld rod is a U-shaped rod with the sliding connecting rod connected in the middle. The other end of the sliding connecting rod is slidably connected to the linkage sliding groove, and both ends of the handheld rod are connected to... Two pressure blocks; the two jaws are symmetrically arranged, with the other end of each pressure block connected to a jaw, and the jaws hinged to the mounting base on the outer wall of the internal threaded sleeve. A spring is connected to the side of the jaws near the internal threaded sleeve, and the other end of the spring is connected to the outer wall of the internal threaded sleeve. The loose flange is installed on the end of the external threaded sleeve away from the handwheel. When docking, pulling the linkage mechanism backward opens the pressure block of the linkage mechanism outward, and the jaws connected to the pressure block open, pushing the tank car quick connector close to the tank car interface flange. Releasing the linkage mechanism causes the jaws to retract. Rotating the handwheel clockwise causes the external threaded sleeve to rotate clockwise, and the internal threaded sleeve moves towards the handwheel via threaded drive, causing the jaws to move backward and tighten with the tank car interface flange.

[0006] Furthermore, the loose flange has a flange plate and a welding ring, the welding ring being fitted around the center of the flange plate.

[0007] Furthermore, it also includes a spring energy storage ring, which is fixed inside the welding ring of the loose flange.

[0008] Furthermore, it also includes a handwheel locking mechanism, which is mounted on the handwheel and is adjusted to lock the handwheel and the external threaded sleeve.

[0009] Furthermore, the handwheel includes a mounting sleeve, a connecting rod, and a rotating wheel. The mounting sleeve of the handwheel is installed on the outside of the external threaded sleeve, and one end of the connecting rod is connected to the mounting sleeve, while the other end is connected to the rotating wheel.

[0010] Furthermore, the connecting rod is a diagonal rod or an arc-shaped rod.

[0011] Furthermore, the handwheel locking mechanism includes an adjusting wheel and a screw. The adjusting wheel is installed on the top of the screw. A connecting block is formed on the mounting sleeve of the handwheel. The connecting block and the mounting sleeve below it have threaded holes that are compatible with the screw. When the handwheel is locked, the adjusting wheel is tightened, and the screw presses against the external threaded sleeve, so that the mounting sleeve of the handwheel is fixed on the external threaded sleeve.

[0012] Furthermore, the loose flange is provided with multiple claw grooves.

[0013] Furthermore, it also includes a one-way thrust ball bearing, which is fitted onto an external threaded sleeve and connected to a loose flange.

[0014] Furthermore, it also includes multiple limiting blocks, which are fixed to the loose flange by bolts and located outside the one-way thrust ball bearing and the internal threaded sleeve.

[0015] The advantages and positive effects of this utility model are:

[0016] 1. This application uses an external threaded sleeve and an internal threaded sleeve for threaded connection, and a handwheel is nested on the external threaded sleeve. The handwheel drive is used to realize the quick docking of the tank car quick connector and the tank car interface flange, which improves the docking accuracy and sealing tightness. Compared with manual docking, it is simple, convenient and easy to operate, saves working time and improves work efficiency.

[0017] 2. This application uses a linkage mechanism connected to the jaws, which helps to open and close the jaws, making it easier to align and fix the quick connector of the tank car with the interface flange of the tank car, enabling quick assembly and disassembly, avoiding deformation from repeated disassembly and assembly of the loose flange, and improving utilization and sealing effect.

[0018] 3. The loose flange edge of this application is equipped with a jaw groove, which allows the jaw to engage within the jaw groove, preventing the internal threaded sleeve from rotating when the handwheel is turned, thus improving docking efficiency. When the linkage mechanism of this application is pulled backward, the jaw separates from the jaw groove. When the jaw opens, rotating the linkage mechanism causes the internal threaded sleeve to drive the jaw to rotate, facilitating adjustment of the jaw's gripping position and improving docking accuracy.

[0019] 4. This application locks the handwheel and the external threaded sleeve together by tightening the adjusting wheel of the handwheel locking mechanism, thereby preventing the handwheel from moving and reducing work efficiency.

[0020] 5. This application uses an O-ring spring accumulator seal, which reduces the operating force required for the handwheel, and a single person can operate the handwheel to achieve vehicle sealing. Attached Figure Description

[0021] Figure 1 This is a perspective view of the quick-connect coupling for tank trucks in this application;

[0022] Figure 2 This is a plan view of the quick coupling for tank trucks in this application.

[0023] The above figures include the following reference numerals:

[0024] 1-Claw; 2-Loose flange; 3-One-way thrust ball bearing; 4-External threaded sleeve; 5-Internal threaded sleeve; 6-Handwheel locking mechanism; 61-Adjusting wheel; 62-Connecting block; 7-Handwheel; 71-Mounting sleeve; 72-Connecting rod; 73-Rotating wheel; 8-Limit block; 9-Butt weld ring; 10-Spring energy storage ring; 11-Connecting rod mechanism; 111-Connecting rod sliding groove; 112-Sliding connecting rod; 113-Hand lever; 114-Pressure block; 12-Spring; 13-Mounting seat; 14-Claw groove. Detailed Implementation

[0025] The present invention will be further described in detail below through specific embodiments. The following embodiments are only descriptive and not limiting, and should not be used to limit the protection scope of the present invention.

[0026] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and 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 this utility model.

[0027] like Figures 1-2As shown, this utility model provides a quick coupling for tank trucks, including: an external threaded sleeve 4, an internal threaded sleeve 5, a handwheel 7, a linkage mechanism 11, two chucks 1, and a loose flange 2.

[0028] like Figures 1-2 As shown, the outer ring of the external threaded sleeve 4 has an external thread; the inner ring of the internal threaded sleeve 5 has an internal thread, and the internal threaded sleeve 5 is connected to the external thread of the external threaded sleeve 4 through its internal thread, and is installed on the outer wall of the external threaded sleeve 4; the handwheel 7 is nested and installed on the outer wall of the external threaded sleeve 4, located behind the internal threaded sleeve 5. When the handwheel 7 is rotated, the external threaded sleeve 4 nested with the handwheel 7 rotates, realizing that the internal threaded sleeve 5 moves towards or away from the handwheel 7 by threaded drive, which facilitates the docking and fixing of the tank truck quick connector and the tank truck interface flange. The mutual connection by the transmission method improves the docking accuracy and sealing tightness. Compared with manual docking, it is simple, convenient and easy to operate, saves working time and improves work efficiency.

[0029] To facilitate locking the handwheel 7, a handwheel locking mechanism 6 is installed on the handwheel 7. Adjusting the handwheel locking mechanism 6 locks the handwheel 7 to the external threaded sleeve 4. In one specific embodiment, the handwheel 7 includes a mounting sleeve 71, a connecting rod 72, and a rotating wheel 73. The mounting sleeve 71 of the handwheel 7 is installed outside the external threaded sleeve 4. One end of the connecting rod 72 is connected to the mounting sleeve 71, and the other end is connected to the rotating wheel 73. The connecting rod 72 is either a slanted rod or an arc-shaped rod. The handwheel locking mechanism 6 includes an adjusting wheel 61 and a screw. The adjusting wheel 61 is installed on the top of the screw. A connecting block 62 is formed on the mounting sleeve 71 of the handwheel 7. The connecting block 62 and the mounting sleeve 71 below it have threaded holes adapted to the screw. When locking the handwheel 7, tightening the adjusting wheel 61 causes the screw to press against the external threaded sleeve 4, thus fixing the mounting sleeve 71 of the handwheel 7 onto the external threaded sleeve 4.

[0030] like Figures 1-2As shown, the linkage mechanism 11 includes a connecting rod sliding groove 111, a sliding connecting rod 112, a handheld rod 113, and two pressing blocks 114. The connecting rod sliding groove 111 is installed on the outer wall of the internally threaded sleeve 5. The handheld rod 113 is a U-shaped rod, with the sliding connecting rod 112 connected in the middle. The other end of the sliding connecting rod 112 is slidably connected to the connecting rod sliding groove 111. The two ends of the handheld rod 113 are connected to the two pressing blocks 114. Specifically, the handheld rod 113 and the pressing blocks 114 are connected by ribs. The sliding of the handheld rod 113 causes the position of the pressing blocks 114 to change, completing the contraction and opening of the claws 1. The two claws 1 are symmetrically arranged. The other end of the pressing block 114 is connected to the claw 1, and the claw 1 is hinged to the mounting seat 13 on the outer wall of the internally threaded sleeve 5. A spring 12 is connected to the side of the claw 1 near the internally threaded sleeve 5, and the other end of the spring 12 is connected to the outer wall of the internally threaded sleeve 5. When the linkage mechanism 11 is pulled, the sliding connecting rod 112 moves backward within the sliding groove 111 of the linkage. The hand lever 113 pulls the pressure block 114, causing the pressure block 114 to lift the claw 1, opening the claw 1. This releases the linkage mechanism 11, and the return spring 12 of the pressure block 114 causes the claw 1 to retract. In this application, when the linkage mechanism 11 is pulled, the force received by the hand lever 113 is sequentially transmitted to the pressure block 114 and the claw 1, thereby opening the claw 1 and facilitating the alignment of the loose flange 2 with the tank truck interface flange. When it is necessary to adjust the gripping position of the claw 1, the linkage mechanism 11 is pulled backward. After the claw 1 opens, the linkage mechanism 11 can be rotated to rotate the claw 1, thus adjusting the gripping position of the claw 1.

[0031] like Figures 1-2 As shown, the loose flange 2 is installed at the end of the external threaded sleeve 4 away from the handwheel 7. The loose flange 2 has a flange plate and a welding ring 9, with the welding ring 9 fitted around the center of the flange plate. The flange plate and welding ring 9 fit tightly together to ensure a seal and improve the sealing effect. A spring accumulator 10 is fixed inside the welding ring 9 of the loose flange 2. This sealing structure uses an O-ring spring accumulator 10, reducing the operating force required for the handwheel 7, allowing for vehicle connection sealing with a single operator. Furthermore, the loose flange 2 has multiple claw grooves 14. These claw grooves 14 on the edge of the loose flange 2 allow the claws 1 to engage, preventing the internal threaded sleeve 5 from rotating when the handwheel 7 is turned.

[0032] In addition, the one-way thrust ball bearing 3 is mounted on the external threaded sleeve 4 and connected to the loose flange 2. The one-way thrust ball bearing 3 helps extend the service life of the equipment by reducing friction and bearing unidirectional axial load. To limit the loosening or sliding of the one-way thrust ball bearing 3 and the internal threaded sleeve 5, multiple limiting blocks 8 are bolted to the loose flange 2, and these limiting blocks 8 are located outside the one-way thrust ball bearing 3 and the internal threaded sleeve 5.

[0033] The working principle of this application is as follows:

[0034] ① Loosen the flange 2 and align it with the tank car interface flange. Pull the linkage mechanism 11 backward, the pawl 1 opens, and pushes the quick connector close to the tank car interface flange. Release the linkage mechanism 11, and the pawl 1 closes. Turn the handwheel 7 clockwise to drive the external threaded sleeve 4 to rotate clockwise. The internal threaded sleeve 5 moves towards the handwheel 7 by the thread drive, driving the pawl 1 to move backward and tighten with the tank car interface flange. Then tighten the adjusting wheel 61 of the handwheel locking mechanism 6, and the handwheel 7 is locked by the handwheel locking mechanism 6.

[0035] ② Loosen the adjusting wheel 61 of the handwheel locking mechanism 6 by 1-2 turns. The handwheel 7 will be released. Turn the handwheel 7 counterclockwise to drive the external threaded sleeve 4 to rotate counterclockwise. The internal threaded sleeve 5 will move away from the handwheel 7 by the thread drive, which will drive the pawl 1 to move forward first, and then pull the connecting rod mechanism 11 backward. The pawl 1 will open, and the tank car quick connector will be pulled away from the tank car interface flange.

[0036] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the concept of the utility model, and these all fall within the protection scope of the present utility model.

Claims

1. A tank car quick coupler, characterized by, It comprises: an outer threaded sleeve (4) with outer threads on its outer wall; an inner threaded sleeve (5) with inner threads on its inner wall, which is connected to the outer threads of the outer threaded sleeve (4) through the inner threads and is installed on the outer wall of the outer threaded sleeve (4); a hand wheel (7) which is nested with the outer wall of the outer threaded sleeve (4) and is located behind the inner threaded sleeve (5); a connecting rod mechanism (11) which comprises a connecting rod sliding groove (111), a sliding connecting rod (112), a hand-held rod (113), and two pressing blocks (114), the connecting rod sliding groove (111) is installed on the outer wall of the inner threaded sleeve (5), the hand-held rod (113) is a U-shaped rod, the middle part of which is connected to the sliding connecting rod (112), the other end of the sliding connecting rod (112) is connected to the connecting rod sliding groove (111), and the two ends of the hand-held rod (113) are connected to the two pressing blocks (114); two clamps (1) which are symmetrically arranged, the other end of the pressing block (114) is connected to the clamp (1), and the clamp (1) is hinged to the mounting seat (13) of the outer wall of the inner threaded sleeve (5), the side of the clamp (1) close to the inner threaded sleeve (5) is connected to a spring (12), and the other end of the spring (12) is connected to the outer wall of the inner threaded sleeve (5); a loose flange (2) which is installed on the end of the outer threaded sleeve (4) away from the hand wheel (7); when docking, the connecting rod mechanism (11) is pulled backward, the pressing block (114) of the connecting rod mechanism (11) opens outward, the clamp (1) connected to the pressing block (114) opens, the tank car quick connector is pushed to close to the tank car flange, the connecting rod mechanism (11) is released, and the clamp (1) is closed; the hand wheel (7) is rotated clockwise to drive the outer threaded sleeve (4) to rotate clockwise, the inner threaded sleeve (5) is moved to the direction close to the hand wheel (7) through thread transmission, the clamp (1) is moved backward, and the tank car flange is tightened.

2. The tank truck quick coupler of claim 1, wherein, The loose flange (2) has a flange plate and a butt joint ring (9), and the butt joint ring (9) is sleeved in the center of the flange plate.

3. The tank truck quick coupler of claim 2, wherein, It also comprises a spring energy storage ring (10) which is fixed inside the butt joint ring (9) of the loose flange (2).

4. The tank truck quick coupler of claim 3, wherein, It also comprises a hand wheel locking mechanism (6) which is installed on the hand wheel (7) and adjusts the locking of the hand wheel (7) and the outer threaded sleeve (4).

5. The tank truck quick coupler of claim 4, wherein, The hand wheel (7) comprises a mounting sleeve (71), a connecting rod (72), and a rotating wheel (73), the mounting sleeve (71) of the hand wheel (7) is installed on the outside of the outer threaded sleeve (4), one end of the connecting rod (72) is connected to the mounting sleeve (71), and the other end is connected to the rotating wheel (73).

6. The tank truck quick coupling of claim 5, wherein, The connecting rod (72) is an inclined rod or an arc-shaped rod.

7. The tank truck quick coupling of claim 6, wherein, The hand wheel locking mechanism (6) comprises an adjusting wheel (61) installed on the top of a screw rod, a connecting block (62) is made on the mounting sleeve (71) of the hand wheel (7), a threaded hole adapted to the screw rod is made in the connecting block (62) and the inside of the mounting sleeve (71) below the connecting block (62), when the hand wheel (7) is locked, the adjusting wheel (61) is tightened, the screw rod is pressed against the outer threaded sleeve (4), and the mounting sleeve (71) of the hand wheel (7) is fixed on the outer threaded sleeve (4).

8. The tank truck quick coupling of claim 7, wherein, A plurality of clamping pawl grooves (14) are made on the loose sleeve flange (2).

9. The tank truck quick coupling of claim 8, wherein, A one-way thrust ball bearing (3) is further included, which is sleeved on the outer threaded sleeve (4) and connected to the loose sleeve flange (2).

10. The tank truck quick coupling of claim 9, wherein, A plurality of limiting blocks (8) are further included, which are fixed on the loose sleeve flange (2) by bolts and located outside the one-way thrust ball bearing (3) and the inner threaded sleeve (5).

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