Emergency locking device for fuel hydrant

Abstract

The present invention relates to an emergency zipper device for a fuel hydrant, which comprises a retractable device, a pull rope and a zipper hook. The retractable device comprises a support plate, a rotating shaft is arranged on the support plate, two or more roller shafts are arranged on the rotating shaft, the rotating shaft is a structure that can selectively drive one of the roller shafts to rotate, and the rotating shaft is a structure that can move axially; gears corresponding to the number of roller shafts are arranged on the rotating shaft, and each roller shaft corresponds to a gear that can drive it to rotate when in use; a latching tooth that can mesh with the corresponding gear when in use is arranged in the roller shaft, and the gear is a structure that can mesh with the latching tooth in the corresponding roller shaft as the rotating shaft moves axially, and when one of the gears meshes with the latching tooth in the corresponding roller shaft, the other gears are separated from the latching teeth in the corresponding roller shafts. When the refueling position of the aircraft is different, the emergency zipper device can be connected to the bolt well without obstacles, and the refueling operator can quickly and timely control the switch of the bolt well.

Description

Technical Field

[0001] The invention relates to the technical field of aircraft refueling accessory equipment, and in particular to an emergency zipper device for a refueling hydrant. Background Art

[0002] During the aircraft refueling operation, the emergency zipper device must be connected while installing the well plug connector. The zipper hook is connected to the well plug guide valve. After refueling, the well plug can be closed by pulling the zipper hook connected to the emergency zipper device to stop the oil output. Only after stopping the oil supply can other work be continued. In addition, if an emergency occurs during the refueling process, the zipper hook connected to the emergency zipper device can be pulled to close the well plug to minimize the risk.

[0003] Usually, an emergency zipper device is fixedly installed on a refueling truck. The installation position of the emergency zipper device is on the same side as the position where the refueling operator performs the refueling operation, so that the refueling operator can control the switch of the bolt well in time. However, the existing emergency zipper device is usually a roller shaft retracting rope, which can only connect to the bolt well guide valve from one direction. In the actual refueling process, due to the different models of aircraft and the different refueling positions, it is sometimes very inconvenient to connect to the bolt well. When the bolt well is on the same side of the emergency zipper device, it can be convenient to pull the rope and close the bolt well. However, when the bolt well and the emergency zipper device are on different sides, the rope needs to bypass the vehicle body and connect to the guide valve of the bolt well. At this time, when the rope on the emergency zipper device is pulled, the rope may be wrapped around the wheel or other equipment, which results in the failure to close the bolt well in time in an emergency, resulting in oil leakage. The failure to immediately close the supply of the oil circuit is bound to increase safety hazards. Although the installation of multiple emergency zippers in multiple directions on the refueling truck can solve the problem of the connection direction with the bolt well, it is not conducive to the refueling operator to quickly and timely control the emergency zipper device, which also increases the risk.

[0004] Moreover, the wheel diameter of the first emergency zipper device is small, and the pull rope is easy to fall off the disc and become loose, and there is no pull rope guide device. During the process of pulling the pull rope, it is inconvenient to pull the pull rope, and the pull rope is easy to wear. Summary of the invention

[0005] Purpose of the invention:

[0006] The invention provides an emergency zipper device for a fuel hydrant, and its purpose is to solve the problem that when the refueling positions of an aircraft are different, the emergency zipper device can be connected to the hydrant well without obstacles, and a refueling operator can promptly and quickly control the switch of the hydrant well to stop the oil supply, and the pull rope will not come off the disc, become loose, or be easily worn.

[0007] Technical solution:

[0008] A gas hydrant emergency zipper device comprises a retractable device, a pull rope and a zipper hook, the retractable device comprises a support plate, a rotating shaft is arranged on the support plate, two or more roller shafts are arranged on the rotating shaft, the rotating shaft is a structure that can selectively drive one of the roller shafts to rotate, and the rotating shaft is a structure that can move axially; gears corresponding to the number of roller shafts are arranged on the rotating shaft, and each roller shaft corresponds to a gear that can drive it to rotate when in use; teeth that can mesh with corresponding gears when in use are arranged in the roller shaft, and the gears are a structure that can mesh with the teeth in the corresponding roller shaft as the rotating shaft moves axially, and when one of the gears meshes with the teeth in the corresponding roller shaft, the other gears are separated from the teeth in the corresponding roller shafts.

[0009] The roller shaft includes a first roller shaft and a second roller shaft, the gears are divided into a first gear and a second gear, and the latch teeth are divided into a first latch tooth and a second latch tooth; the first gear and the second gear are arranged on the rotating shaft, the first gear can be meshed with the first latch tooth arranged in the first roller shaft, and the second gear can be meshed with the second latch tooth arranged in the second roller shaft, and the distance between the first gear and the second gear is smaller than the distance between the first latch tooth and the second latch tooth.

[0010] The first roller and the second roller both include a first wheel disc, a reel and a second wheel disc, the first wheel disc and the second wheel disc are fixedly connected at both ends of the reel, the first wheel disc and the second wheel disc are arranged at both ends of the reel, the reel is connected to the rotating shaft through a bearing, and the latching teeth arranged in the reel can mesh with the gears arranged on the rotating shaft.

[0011] The latching teeth arranged in the reel are structures that can extend into the tooth grooves of the gear when in use.

[0012] A plurality of radial tooth grooves are arranged in the reel, and the latching teeth are structures arranged in the tooth grooves and can move radially along the reel along the tooth grooves; the rear end of the latching teeth is connected with a first spring.

[0013] One side surface of the lower part of the latch tooth is an inclined surface that can be contacted by the tooth peak of the gear when in use.

[0014] Three circles of grooves are arranged in sequence at the rear of the rotating shaft, namely: the first groove, the second groove and the third groove; an adjustment damper is arranged on the side of the rotating shaft and can be inserted into the first groove, the second groove or the third groove when in use. When the adjustment damper is inserted into the third groove, the first gear is meshed with the first tooth arranged in the first roller shaft, and when the adjustment damper is inserted into the first groove, the second gear is meshed with the second tooth arranged in the second roller shaft. When the adjustment damper is inserted into the second groove, all gears and teeth are separated.

[0015] The front end of the rotating shaft is connected to the front support plate through the first bearing seat, and the rear end of the rotating shaft is connected to the rear support plate through the second bearing seat. An adjustable damping is set in the slot hole in the second bearing seat. The adjustable damping includes a nut, a second spring and a ball. One end of the second spring touches the nut, and the other end of the second spring touches the ball. The lower part of the ball extends out of the slot and can extend into the first groove, the second groove or the third groove.

[0016] The first groove, the second groove or the third groove is in an arc shape adapted to the arc of the lower part of the ball.

[0017] V-shaped inclined plates are also fixedly provided on the support plates on both sides, and the inclined plates include a first inclined plate and a second inclined plate. The corresponding ends of the first inclined plate and the second inclined plate are fixedly connected with guide rails. The guide rails are divided into two frames corresponding to the first roller shaft and the second roller shaft. A sliding ring is provided in the guide rail. The sliding ring is an annular structure with a groove on the outside, and the sliding ring can move in the guide rail.

[0018] Advantages and effects:

[0019] When the aircraft is refueling in different positions, the emergency zipper device can be connected to the bolt well without obstacles, and the refueling operator can quickly and timely control the switch of the bolt well to stop the oil supply, and the pull rope will not come off the disc, become loose, or be easily worn. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the emergency zipper device;

[0021] Figure 2 This is a top view of the emergency zipper device;

[0022] Figure 3 It is a side view of the emergency zipper device;

[0023] Figure 4 is a schematic diagram of the rotating shaft;

[0024] Figure 5 It is a schematic diagram of gears and latch teeth;

[0025] Figure 6 It is a schematic diagram of the inclined surface at the end of the latch tooth;

[0026] Figure 7 is a schematic diagram of the support plate;

[0027] Figure 8 Schematic diagram for adjusting damping;

[0028] Fig. 9 is a schematic diagram of brake damping;

[0029] Fig.10 It is a schematic diagram of the guide rail on one side;

[0030] Fig.11 This is a schematic diagram of the guide rail on the other side;

[0031] Fig.12 is a top view of the sliding ring;

[0032] Fig.13 This is a schematic diagram of placing the retractable device on the refueling vehicle body;

[0033] Fig.14 Use a state diagram for the handle;

[0034] Description of reference numerals:

[0035] 1. Support plate, 2. Rotating shaft, 3. First roller, 4. Second roller, 5. First gear, 5-1. Tooth groove, 6. Second gear, 7. First latch tooth, 8. Second latch tooth, 9. First wheel, 10. Scroll, 10-1. Radial tooth groove, 11. Second wheel, 12. First spring, 13. First groove, 14. Second groove, 15. Third groove, 16. First bearing seat, 17. Second bearing seat, 18. Adjust damping, 18-1. Nut, 18-2. Second spring, 18 -3. Ball, 19. Inner hole retaining ring, 20. First inclined plate, 21. Second inclined plate, 22. Guide rail, 22-1. Square ring, 23. Sliding ring, 24. Brake damper, 24-1. C-shaped nut, 24-2. Shaft, 24-3. Bushing, 24-4. Third spring, 24-5. Rubber pad, 26. Handle, 26-1. Connecting shaft, 26-2. Fixed plate, 27. Pointer, 28. Head, 29. Handwheel, 30. Guide tube, 30-1. Ring stand, 31. Retractable device. DETAILED DESCRIPTION

[0036] like Figure 1 and Fig.11 As shown, an emergency zipper device for a gas hydrant includes a retractable device 31, a pull rope and a zipper hook. The retractable device 31 includes a support plate 1, a rotating shaft 2 is provided on the support plate 1, two or more rollers are provided on the rotating shaft 2, the rotating shaft 2 is a structure that can selectively drive one of the rollers to rotate, a pull rope is connected to the roller, the pull rope is connected to one end of the zipper hook, and the other end of the zipper hook is connected to the left and right positions of different front directions of the refueling vehicle body.

[0037] The rotating shaft 2 is a structure that can move axially relative to the roller shaft; the rotating shaft 2 is provided with gears corresponding to the number of roller shafts, and each roller shaft corresponds to a gear that can drive it to rotate when in use; the correspondence here means that the gear can engage with the locking teeth in the roller shaft by moving when in use.

[0038] The roller shaft is provided with latching teeth which can mesh with corresponding gears when in use. The gear is a structure which can move synchronously with the rotating shaft 2 as the rotating shaft 2 moves axially and mesh with the latching teeth in the corresponding roller shaft. When one of the gears meshes with the latching teeth in the corresponding roller shaft, the other gears are separated from the latching teeth in their respective corresponding roller shafts.

[0039] like Figure 1 As shown, the roller shaft includes a first roller shaft 3 and a second roller shaft 4, the gears are divided into a first gear 5 and a second gear 6, and the latch teeth are divided into a first latch tooth 7 and a second latch tooth 8; the first gear 5 and the second gear 6 are fixedly arranged on the rotating shaft 2, the first gear 5 can be driven by the axial movement of the rotating shaft 2 to mesh with the first latch tooth 7 arranged in the first roller shaft 3, the second gear 6 can be driven by the axial movement of the rotating shaft 2 to mesh with the second latch tooth 8 arranged in the second roller shaft 4, and the distance d1 between the first gear 5 and the second gear 6 is smaller than the distance d2 between the first latch tooth 7 and the second latch tooth 8.

[0040] Forward (Forward means Figure 1 The first gear 5 is meshed with the first tooth 7, and the first roller 3 is driven by the rotating shaft 2; at this time, the second gear 6 is separated from the second tooth 8; backward (forward is as shown in FIG. Figure 1 The rotating shaft 2 is pulled out (as shown on the right side), and the second gear 6 is meshed with the second latching tooth 8. At this time, the rotating shaft 2 can drive the second roller shaft 4 to rotate; at this time, the first gear 5 is separated from the first latching tooth 7, that is, the rotating shaft 2 selectively drives the roller shaft to rotate.

[0041] like Figure 1 and Figure 2 As shown, the first roller 3 and the second roller 4 are arranged in parallel along the axial direction, and the first roller 3 and the second roller 4 each include a first wheel disc 9, a reel 10 and a second wheel disc 11, and the first wheel disc 9 and the second wheel disc 11 are fixedly connected at both ends of the reel 10, and the first wheel disc 9 and the second wheel disc 11 are arranged at both ends of the reel 10, and the reel 10 is connected to the rotating shaft 2 through a bearing, and the latching teeth arranged in the reel 10 can mesh with the gears arranged on the rotating shaft 2.

[0042] like Figure 5 and Figure 6 As shown, the latching teeth arranged in the reel 10 are structures that can extend into the tooth groove 5-1 of the gear when in use.

[0043] A plurality of radial tooth grooves 10-1 are arranged in the reel 10, that is, the length direction of the tooth groove 10-1 is consistent with the radial direction of the reel 10, and the latching tooth is a structure arranged in the tooth groove 10-1 and can move along the tooth groove along the radial direction of the reel 10; the rear end of the latching tooth, that is, the end that does not contact the gear, is connected to the first spring 12.

[0044] One side of the lower part of the latch tooth is an inclined surface A that can be contacted by the tooth peak 5-2 of the gear when in use. That is to say, when in use, if the position of the latch tooth just corresponds to the tooth peak of the gear, then during the movement of the gear, the inclined surface A will be pressed against, forcing the latch tooth to retract into the tooth groove 10-1, and at this time, the first spring 12 is compressed.

[0045] Then, the rotating shaft 2 is rotated to make the gear rotate together. At this time, when the tooth groove 5-1 of the gear corresponds to the latch tooth, under the action of the first spring 12, the latch tooth will be quickly pushed into the tooth groove 5-1 to achieve meshing with the gear.

[0046] The rear end of the rotating shaft 2 is Figure 4 On the middle right side, three circles of grooves are arranged in sequence, namely: a first groove 13, a second groove 14 and a third groove 15. The distance between the first groove 13 and the second groove 14 is equal to the distance between the first gear 5 and the first latch tooth 7, and the distance between the second groove 14 and the third groove 15 is equal to the distance between the second gear 6 and the second latch tooth 8. An adjustment damper 18 is arranged on the side of the rotating shaft 2, which can be inserted into the first groove 13, the second groove 14 or the third groove 15 when in use. When the adjustment damper 18 is inserted into the third groove 15, the first gear 5 is meshed with the first latch tooth 7 provided in the first roller shaft 3. When the adjustment damper 18 is inserted into the first groove 13, the second gear 6 is meshed with the second latch tooth 8 provided in the second roller shaft 4. When the adjustment damper 18 is inserted into the second groove 14, all gears and latch teeth are separated.

[0047] like Figure 1 and Figure 7 As shown, the support plate 1 includes a front support plate 1-1 and a rear support plate 1-2.

[0048] like Figure 1-Figure 3 As shown, the front end of the rotating shaft 2 is connected to the front support plate 1-1 through the first bearing seat 16, and the rear end of the rotating shaft 2 is connected to the rear support plate 1-2 through the second bearing seat 17. An adjustment damper 18 is arranged in the slot 17-1 in the second bearing seat 17. The adjustment damper 18 can ensure that when the rotating shaft 2 is pushed forward or pulled backward axially, the first gear 5 is meshed with the first latch tooth 7, or the second gear 6 is meshed with the second latch tooth 8.

[0049] like Figure 8 As shown, the adjustment damping 18 includes a nut 18-1, a second spring 18-2 and a ball 18-3. One end of the second spring 18-2 touches the nut 18-1, and the other end of the second spring 18-2 touches the ball 18-3. The lower part of the ball 18-3 is shown in the figure. The opening of the slot 17-1 is in an inward state, that is, the size of the opening only needs to allow the lower part of the ball 18-3 to extend out, and it is also necessary to prevent the ball from slipping out of the slot 17-1 and extending into the first groove 13, the second groove 14 or the third groove 15.

[0050] The first groove 13, the second groove 14 or the third groove 15 is an arc shape adapted to the arc of the lower part of the ball 18-3. When the rotating shaft 2 is pushed or pulled out, the ball 18-3 is squeezed and can enter the first groove 13 from the second groove 14, or enter the third groove 15 from the second groove 14.

[0051] like Figure 1 As shown, an indicator sign is provided at the front end of the rotating shaft 2, and the indicator sign shows front, middle and rear. A pointer 27 is provided on the adjacent support plate 1. The positions of front, middle and rear correspond to the positions of the first groove 13, the second groove 14 and the third groove 15, that is, when the ball 18-3 contacts the second groove 14, the pointer 27 points to the center; when the rotating shaft 2 is pushed axially forward and the ball 18-3 contacts the first groove 13, the pointer 27 points forward; when the rotating shaft 2 is pulled axially backward and the ball 18-3 contacts the third groove 15, the pointer 27 points backward.

[0052] like Figure 3 and Figure 10-12 As shown, V-shaped inclined plates are fixedly provided on the support plates 1 on both sides, and the distance between the edges of the inclined plates on both sides is greater than the diameter of the wheel disc. The inclined plates include a first inclined plate 20 and a second inclined plate 21. The corresponding ends of the first inclined plate 20 and the second inclined plate 21 are fixedly connected with guide rails 22 by bolts. The guide rails 22 are divided into two frames corresponding to the first roller shaft 3 and the second roller shaft 4. A sliding ring 23 is provided in the guide rail 22. The sliding ring 23 is an annular structure with a groove on the outside, and the sliding ring 23 can move in the guide rail 22.

[0053] Combination Fig.13 , the first roller 3 is used as Fig.11 After the guide rail 22 shown in the figure passes through the pull rope, the pull rope passes through the guide tube 30 set on the refueling vehicle body, and is connected to the ring frame 30-1 through the zipper hook connected to the end of the pull rope, so as to facilitate the use of the pull rope. The second roller 4 is used as shown in Fig.10 The guide rail 22 shown is also provided with a square ring 22 - 1 to which a zipper hook can be hung.

[0054] The pull rope connected to the roller shaft passes through the sliding ring 23 and is connected to the zipper hook. When the pull rope is pulled or retracted, the pull rope can move arbitrarily along the guide rail 22 in the sliding ring 23, making pulling or retracting convenient and labor-saving. The contact between the sliding ring 23 and the pull rope is a smooth arc, which does not damage the pull rope and extends the service life of the pull rope.

[0055] like Fig. 9As shown, the first inclined plate 20 and the second inclined plate 21 are also provided with a brake damper 24. The first brake damper 24 on the first inclined plate 20 can contact the first wheel disc 9 of the first roller 3, and the second brake damper 24 on the second inclined plate 21 can contact the first wheel disc 9 of the second roller 4. The brake damper 24 is a structure capable of limiting the rotation of the first roller 3 or the second roller 4. The brake damper 24 includes a C-shaped nut 24-118-1, a shaft 24-2, a sleeve 24-3, a third spring 24-4 and a rubber pad 24-5. The shaft 24-2 is provided In the sleeve 24-3, both ends of the shaft rod 24-2 extend out of the sleeve 24-3, the third spring 24-4 is sleeved on the shaft rod 24-2, one end of the third spring 24-4 is connected to the shaft rod 24-2, the other end of the third spring 24-4 is connected to the sleeve 24-3, one end of the shaft rod 24-2 is set in the groove of the C-shaped nut 24-118-1, one end of the shaft rod 24-2 is connected to the C-shaped nut 24-118-1 through an axis, the other end of the shaft rod 24-2 is connected to the rubber pad 24-5, and the shaft rod 24-2 is fixedly set on the inclined plate.

[0056] When the rotating shaft 2 drives the first roller 3 to rotate, in order to prevent the second roller 4 from rotating and affecting the retracting and releasing of the pull rope of the first roller 3, the C-shaped nut 24-118-1 can be pressed manually, the shaft 24-2 can be relatively extended forward, and the rubber pad 24-5 can contact the first wheel 9 of the second roller 4 to limit the rotation of the second roller 4; when the C-shaped nut 24-118-1 is manually lifted, the C-shaped nut 24-118-1 is perpendicular to the inclined plate, the two ends of the C-shape are in contact with the sleeve 24-3, the shaft 24-2 is pulled out, and the third spring 24-4 is compressed. At this time, the rubber pad 24-5 leaves the first wheel 9 of the second roller 4 and does not limit the rotation of the second roller 4.

[0057] When the rotating shaft 2 drives the second roller shaft 4 to rotate, the braking method to prevent the first roller shaft 3 from rotating is the same as above.

[0058] like Figure 1 and Fig.14 As shown, the hand wheel 29 is connected with a handle 26, which is connected to a door-shaped fixing piece 26-2 provided on the hand wheel 29 through a connecting shaft 26-1, and the handle 26 can be moved away and buckled with the hand wheel 29. That is, when the handle 26 is moved away, the handle 26 is perpendicular to the hand wheel 29, and at this time, it is convenient to rotate the hand wheel 29; when the handle 26 is buckled, the handle 26 contacts the hand wheel 29, and at this time, space is saved and the handle 26 is prevented from being scratched by people.

[0059] A nut 18 - 1 -shaped head 28 is provided on the rotating shaft 2 , and pressing the head 28 facilitates pushing and pulling out of the rotating shaft 2 .

[0060] like Figure 1 and Figure 2As shown, bearings are disposed in the first bearing seat 16 and the second bearing seat 17 , and the bearings are connected to the rotating shaft 2 . An inner hole retaining ring 19 is also disposed in the first bearing seat 16 .

[0061] When the emergency zipper of the fuel hydrant is provided with two rollers, the movement of the rotating shaft 2 is set to three gears, namely, the front gear, the middle gear and the rear gear. The middle gear is the state when the rotating shaft 2 is pushed to place the ball 18-3 in the second groove 14. At this time, the hand wheel 29 is turned, the rotating shaft 2 rotates, but the first roller 3 and the second roller 4 do not rotate; in the middle gear state, the rotating shaft 2 is pushed forward, the rotating shaft 2 squeezes the ball 18-3, and the ball 18-3 enters the first groove 13 from the second groove 14, and at the same time the first gear 5 is just meshed with the first tooth 7, and the rotating shaft 2 rotates. Turn the hand wheel 29, the rotating shaft 2 rotates, the rotating shaft 2 drives the first roller 3 to rotate, and the second roller 4 does not move; when in the middle gear state, push the rotating shaft 2 backward, the rotating shaft 2 squeezes the ball 18-3, the ball 18-3 enters the third groove 15 from the second groove 14, and the second gear 6 is just engaged with the second latch tooth 8, turn the hand wheel 29, the rotating shaft 2 rotates, the rotating shaft 2 drives the second roller 4 to rotate, and the first roller 3 does not move; when the refueling truck is ready to refuel the aircraft, you can choose to use the pull rope on the first roller 3 or the second roller 4 to connect with the bolt well.

Claims

1. A fuel hydrant emergency zipper device, comprising a retractable device (31), a pull rope and a zipper hook, characterized in that: The retracting and unwinding device (31) comprises a support plate (1), a rotating shaft (2) being arranged on the support plate (1), two or more rollers being arranged on the rotating shaft (2), the rotating shaft (2) being a structure capable of selectively driving one of the rollers to rotate, and the rotating shaft (2) being a structure capable of axial movement; the rotating shaft (2) being arranged with gears corresponding to the number of the rollers, and each roller corresponds to a gear capable of driving the roller to rotate when in use; the rollers are provided with latching teeth capable of meshing with corresponding gears when in use, and the gears are a structure capable of meshing with the latching teeth in the corresponding rollers as the rotating shaft (2) moves axially, and when one of the gears is meshed with the latching teeth in the corresponding rollers, the other gears are separated from the latching teeth in the corresponding rollers; The roller shaft comprises a first roller shaft (3) and a second roller shaft (4); the gears are divided into a first gear (5) and a second gear (6); and the latching teeth are divided into a first latching tooth (7) and a second latching tooth (8); the rotating shaft (2) is provided with a first gear (5) and a second gear (6); the first gear (5) can mesh with a first latching tooth (7) provided in the first roller shaft (3); the second gear (6) can mesh with a second latching tooth (8) provided in the second roller shaft (4); and the distance between the first gear (5) and the second gear (6) is smaller than the distance between the first latching tooth (7) and the second latching tooth (8); The first roller (3) and the second roller (4) both comprise a first wheel disc (9), a reel (10) and a second wheel disc (11); the first wheel disc (9) and the second wheel disc (11) are fixedly connected at both ends of the reel (10); the first wheel disc (9) and the second wheel disc (11) are arranged at both ends of the reel (10); the reel (10) is connected to the rotating shaft (2) via a bearing; and a latching tooth arranged in the reel (10) can mesh with a gear arranged on the rotating shaft (2); The rear part of the rotating shaft (2) is provided with three circles of grooves in sequence, namely: a first groove (13), a second groove (14) and a third groove (15); an adjustment damper (18) is provided on the side of the rotating shaft (2) and can be inserted into the first groove (13), the second groove (14) or the third groove (15) when in use; when the adjustment damper (18) is inserted into the third groove (15), the first gear (5) is meshed with a first latching tooth (7) provided in the first roller shaft (3); when the adjustment damper (18) is inserted into the first groove (13), the second gear (6) is meshed with a second latching tooth (8) provided in the second roller shaft (4); when the adjustment damper (18) is inserted into the second groove (14), all gears and the latching teeth are separated.

2. The fuel hydrant emergency zipper device according to claim 1, characterized in that: The latching teeth arranged in the reel (10) are structures that can extend into the tooth groove (5-1) of the gear when in use.

3. The fuel hydrant emergency zipper device according to claim 1, characterized in that: A plurality of radial tooth grooves (10-1) are arranged in the reel (10); the latching teeth are structures arranged in the radial tooth grooves (10-1) and capable of moving radially along the reel (10) along the tooth grooves; and the rear end of the latching teeth is connected to a first spring (12).

4. The fuel hydrant emergency zipper device according to claim 3, characterized in that: One side surface of the lower part of the latch tooth is an inclined surface (A) capable of being contacted by the tooth peak (5-2) of the gear when in use.

5. The fuel hydrant emergency zipper device according to claim 1, characterized in that: The front end of the rotating shaft (2) is connected to the front support plate (1-1) via a first bearing seat (16), and the rear end of the rotating shaft (2) is connected to the rear support plate (1-2) via a second bearing seat (17). An adjusting damper (18) is arranged in a slot hole (17-1) in the second bearing seat (17). The adjusting damper (18) comprises a nut (18-1), a second spring (18-2) and a ball (18-3). One end of the second spring (18-2) contacts the nut (18-1), and the other end of the second spring (18-2) contacts the ball (18-3). The lower part of the ball (18-3) extends out of the slot hole (17-1) and can extend into the first groove (13), the second groove (14) or the third groove (15).

6. The fuel hydrant emergency zipper device according to claim 5, characterized in that: The first groove (13), the second groove (14) or the third groove (15) is in an arc shape that is adapted to the arc of the lower part of the ball (18-3).

7. The fuel hydrant emergency zipper device according to claim 1, characterized in that: V-shaped inclined plates are also fixedly arranged on the support plates (1) on both sides, and the inclined plates include a first inclined plate (20) and a second inclined plate (21). The corresponding ends of the first inclined plate (20) and the second inclined plate (21) are fixedly connected with guide rails (22). The guide rails (22) are divided into two frames corresponding to the first roller shaft (3) and the second roller shaft (4). A sliding ring (23) is arranged in the guide rail (22). The sliding ring (23) is an annular structure with a groove on the outside, and the sliding ring (23) can move in the guide rail (22).

Images