Safety device for preventing pulling of oiling machine

Abstract

The utility model belongs to the field of oiling equipment, especially is involved in a kind of safety device of anti-pulling oiling machine.The technology includes pedestal and the oiling machine of installation in the top of pedestal, and the oiling machine is connected with oiling gun, further include connecting belt and shell, the top of pedestal is fixed with connecting ring, one end of connecting belt is fixed on oiling gun, the other end independently passes through shell and is fixed on connecting ring, freely rotating shaft is installed in shell, the section of connecting belt in shell is rolled up on rotating shaft, winding assembly for driving rotating shaft automatic winding connecting belt and limiting mechanism for preventing rotating shaft from releasing connecting belt during oiling are installed in shell.The utility model can avoid the oiling machine pulling accident caused by vehicle movement by the automatic winding of connecting belt and the restriction of limiting mechanism in the mode of physical limiting, maximumly reduce property loss and fuel leakage risk.

Description

Technical Field

[0001] This utility model belongs to the field of refueling equipment, and in particular relates to a safety protection device for an anti-pull refueling machine. Background Technology

[0002] With the booming development of the automotive industry, gas stations have become an indispensable public service facility in modern life. Currently, gas stations generally use manual operation of fuel nozzles to refuel vehicles. In practice, due to factors such as noisy environments, staff fatigue, poor communication with drivers, or negligence on both sides, situations occasionally occur where staff fail to remove the fuel nozzle in time, and the driver starts the vehicle and drives away. Once such an incident occurs, the fuel nozzle can easily be forcibly pulled off, leading to serious consequences such as damage to the fuel nozzle and pump, or even explosions.

[0003] Currently, the main solutions to this problem are strengthening personnel training and management, and setting up warning signs. These are all "soft" management measures and cannot fundamentally eliminate the risks caused by human error. Although existing technologies have proposed "hard" protection measures such as the fuel nozzle disconnect valve, the disconnect valve usually only activates after a large pulling force, which may still cause some impact on the fuel dispenser base. Moreover, it is a disposable component, and the replacement cost is high. Therefore, there is a need for a safety device that can actively prevent, physically limit, and is reusable, and can act immediately when the vehicle moves abnormally, fundamentally avoiding the occurrence of pulling accidents. Utility Model Content

[0004] The purpose of this utility model is to provide a safety protection device for a fuel dispenser that prevents the fuel dispenser from being pulled when the vehicle moves abnormally.

[0005] The aforementioned safety protection device for the anti-pull refueling machine includes a base and a refueling machine mounted on top of the base. The refueling machine is connected to a refueling nozzle and also includes a connecting belt and a housing. A connecting ring is fixed to the top of the base. One end of the connecting belt is fixed to the refueling nozzle, and the other end passes independently through the housing and is fixed to the connecting ring. A freely rotatable shaft is installed inside the housing. A section of the connecting belt located inside the housing is wound onto the shaft. A winding assembly for driving the shaft to automatically wind up the connecting belt and a limiting mechanism for preventing the shaft from releasing the connecting belt during refueling are installed inside the housing.

[0006] Furthermore, the winding assembly includes a first groove fitted onto one end of the rotating shaft and rotatably engaged therewith. The first groove is fixed to the inner wall of the housing. A coil spring is installed on the inner side of the first groove. When the coil spring is in its natural state, the connecting belt is in a straight state and the refueling nozzle is placed on the refueling machine.

[0007] Furthermore, the limiting mechanism includes a second groove fixedly mounted on the other end of the rotating shaft. The groove opening of the second groove faces forward and has ratchet teeth on its inner wall. A mounting block is provided in the lower end of the second groove. A pawl that meshes with the ratchet teeth and prevents the second groove from rotating in the direction of the release connecting belt is hinged to the lower end of the mounting block. A mounting rod that slides back and forth with the front side wall of the housing is inserted through the housing. One end of the mounting rod located inside the housing is fixed to the mounting block.

[0008] Furthermore, the lower end of the mounting block is provided with a hinge groove, and the upper end of the pawl is hinged in the hinge groove. When the pawl and the ratchet teeth mesh with each other, the pawl is in contact with the lower wall of the hinge groove and has a certain distance from the upper wall of the hinge groove.

[0009] Furthermore, the refueling nozzle is connected to the refueling machine via a refueling pipe.

[0010] Furthermore, the length of the connecting strip is less than the length of the refueling pipe.

[0011] Furthermore, both the left and right side walls of the housing are provided with through slots for connecting belts to pass through independently.

[0012] Furthermore, a limiting block is fixed to the inner bottom of the housing, and the limiting block is fitted onto the mounting rod and slides back and forth with it.

[0013] Furthermore, the front sidewall of the housing has a through hole for the mounting rod to pass through, and a toggle plate is fixed to one end of the mounting rod located outside the housing.

[0014] Furthermore, a rubber washer is fixed inside the through hole to increase the friction between the mounting rod and the through hole.

[0015] Compared with the prior art, the present invention has the following beneficial effects: This invention utilizes a connecting belt, with one end fixed to the fuel nozzle and the other end fixed to a connecting ring, to physically limit and prevent fuel dispenser pulling accidents caused by vehicle movement. This transforms post-accident remediation into pre-accident prevention, significantly improving safety. Furthermore, by winding a portion of the connecting belt onto a rotating shaft and coordinating with the automatic winding mechanism, the device adapts to different vehicle models and parking positions, improving versatility. It also keeps the connecting belt taut at all times. Under the action of the limiting mechanism, the rotating shaft cannot rotate in the direction of releasing the connecting belt. Therefore, if the vehicle moves, the connecting belt quickly becomes taut, absorbing and bearing most of the tension, protecting the fuel dispenser, and minimizing the risk of property damage and fuel leakage. Moreover, this device is not disposable and can be used multiple times within certain limits; maintenance and replacement are simple and quick. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the shell; Figure 3 This is a schematic diagram showing the fit between the second groove, the mounting block, and the pawl. The components in the diagram are named as follows: 1. Base; 2. Fuel dispenser; 3. Fuel pipe; 4. Fuel nozzle; 5. Housing; 6. Actuating plate; 7. Connecting belt; 8. Connecting ring; 9. First groove; 10. Coil spring; 11. Rubber washer; 12. Mounting rod; 13. Limiting block; 14. Pawl; 15. Mounting block; 16. Rotating shaft; 17. Second groove. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention. Example 1

[0018] The safety protection device for an anti-pull-out fuel dispenser described in this embodiment includes a base 1 and a fuel dispenser 2 installed on top of the base 1. The fuel dispenser 2 is connected to a fuel nozzle 4. Figure 1 As shown, the fuel nozzle 4 and the fuel dispenser 2 are connected by the fuel pipe 3, and the base 1 is a concrete block; It also includes a connecting strap 7 and a housing 5. A connecting ring 8 is fixed to the top of the base 1. One end of the connecting strap 7 is fixed to the fuel nozzle 4, and the other end passes independently through the housing 5 and is fixed to the connecting ring 8. In this embodiment, by fixing one end of the connecting strap 7 to the fuel nozzle 4 and the other end to the connecting ring 8, the fuel dispenser pulling accident caused by vehicle movement can be avoided by physically limiting the connection, transforming post-accident remediation into pre-accident prevention, thereby significantly improving safety; Figure 1 and Figure 2 As shown, the housing 5 is a cylindrical box-shaped structure. The left side wall and right side wall of the housing 5 are provided with through slots for the connecting strap 7 to pass through independently. The connecting strap 7 is a retractable high-strength braided strap, and the connecting ring 8 is permanently fixed to the top of the base 1. In actual application, the length of the connecting strap 7 is less than the length of the refueling pipe 3, so as to ensure that the connecting strap 7 can play a protective role. A freely rotatable shaft 16 is installed inside the housing 5. A section of the connecting belt 7 located inside the housing 5 is wound onto the shaft 16. One end of the shaft 16 is fitted with a first groove 9 that rotatably engages with it. The first groove 9 is fixed to the inner wall of the housing 5. A coil spring 10 is installed inside the first groove 9. When the coil spring 10 is in its natural state, the connecting belt 7 is straight and the refueling nozzle 4 is placed on the refueling machine 2. (The first groove 9 and the coil spring 10 in this paragraph together constitute the structure used to automatically drive the shaft 16 to wind up the connecting belt 7.) In practical applications, the winding assembly can also have a mounting groove directly opened on the front inner side wall of the housing 5 (with the coil spring 10 installed in the mounting groove). In this embodiment, by winding a portion of the connecting strap 7 onto the rotating shaft 16 and cooperating with the automatic winding of the coil spring 10, the device can be adapted to different parking positions of different vehicle models (cars, SUVs, trucks, etc.), improving its versatility. It also ensures that the connecting strap 7 is always in a straight state, so that it can quickly become tensioned when the vehicle moves, thereby absorbing and bearing most of the tensile force. Figure 1 and Figure 2 As shown, the two ends of the rotating shaft 16 are respectively mounted on the front inner wall and the rear inner wall of the housing 5 and are rotatably engaged with them. The middle part of the connecting belt 7 is folded and then wound onto the rotating shaft 16. In this way, the rotating shaft 16 can simultaneously wind up and release both ends of the connecting belt 7. The opening of the first groove 9 faces forward and the bottom of the groove is provided with a channel for the rotating shaft 16 to pass through independently (independent passage means that the two are engaged but do not contact each other). The outer end of the coil spring 10 is fixed on the inner wall of the first groove 9, and the inner end is fixed on the rotating shaft 16. refer to Figure 2 and Figure 3The other end of the rotating shaft 16 is fixedly fitted with a second groove 17. The groove opening of the second groove 17 faces forward and has ratchet teeth on its inner wall. A mounting block 15 is provided in the lower end of the second groove 17. The lower end of the mounting block 15 is hinged to a pawl 14 that meshes with the ratchet teeth and prevents the second groove 17 from rotating in the direction of the release connecting belt 7. A mounting rod 12 is inserted through the front side wall of the housing 5 and slides back and forth with it. One end of the mounting rod 12 located inside the housing 5 is fixed to the mounting block 15. (The second groove 17, mounting block 15, pawl 14, and mounting rod 12 in this paragraph constitute the limiting mechanism for preventing the rotating shaft 16 from releasing the connecting belt 7 during refueling. In actual application, the ratchet teeth can also be gear teeth, the mounting block 15 can be a gear meshing with it, and the mounting rod 12 can be a prismatic structure, but the rotating shaft 16 cannot rotate when meshed.) In this embodiment, during refueling, pushing the mounting rod 12 inwards towards the housing 5 allows the mounting block 15 with its hinged pawl 14 and the second groove 17 with its ratchet teeth to form a ratchet mechanism. This prevents the shaft 16 from rotating in the direction of releasing the connecting belt 7. Therefore, when the vehicle moves, the connecting belt 7 quickly becomes tensioned, absorbing and bearing most of the tension, protecting the fuel dispenser 2, and minimizing the risk of property damage and fuel leakage. Furthermore, pulling the mounting rod 12 outwards from the housing 5 quickly releases the engagement between the mounting block 15 and the second groove 17, allowing the operator to move the fuel nozzle 4 freely. The entire refueling process only requires pulling the mounting rod 12 outwards and pressing it inwards, making it simple and quick. It can be completed while the gas station operator moves the fuel nozzle 4, adding almost no extra working time. Figure 3 For example, the lower end of the mounting block 15 is provided with a hinge groove, and the upper end of the pawl 14 is hinged in the hinge groove. When the pawl 14 and the ratchet teeth mesh with each other, the pawl 14 is in contact with the lower groove wall of the hinge groove and has a certain distance from the upper groove wall of the hinge groove. In this way, the pawl 14 will naturally mesh with the ratchet teeth under the action of gravity, and at the same time it can swing upward, so that the second groove body 17 can still rotate in the direction of winding the connecting belt 7. refer to Figure 1 and Figure 2 The inner bottom of the housing 5 is fixed with a limiting block 13, which is fitted onto the mounting rod 12 and slides back and forth with it. The mounting rod 12 has a prismatic structure to ensure that it can only move back and forth. The front side wall of the housing 5 has a through hole for the mounting rod 12 to pass through. The end of the mounting rod 12 located outside the housing 5 is fixed with a toggle plate 6, which makes it more convenient to press and pull the mounting rod 12. In actual application, when the pawl 14 and the ratchet are engaged, there is a certain gap between the toggle plate 6 and the front side wall of the housing 5.

[0019] In this embodiment, when in use, first pull the actuating plate 6 outward from the housing 5 to disengage the mounting block 15 from the second groove 17, thus releasing the engagement of the pawl 14 and the ratchet. At this time, the rotation of the rotating shaft 16 is unrestricted, and the operator can freely move the fuel nozzle 4 until it is connected to the car's fuel tank. At the same time as the connection, the actuating plate 6 can be pressed inward from the housing 5 to engage the pawl 14 and the ratchet. At this time, the rotating shaft 16 cannot rotate in the direction of releasing the connecting belt 7. Once a vehicle moves, the connecting belt 7 will quickly become tensioned, absorbing and bearing most of the tension, thus preventing the fuel dispenser 2 from being pulled and causing oil leakage or even explosion. Example 2

[0020] This embodiment further illustrates the technology, wherein a rubber washer 11 is fixed inside the through hole to increase the friction between the mounting rod 12 and the through hole, such as... Figure 2 As shown, in this embodiment, by fixing a rubber washer 11 inside the through hole through which the mounting rod 12 passes, the friction between the mounting rod 12 and the through hole can be increased, thereby ensuring that the mounting rod 12 will not slide in its natural state and improving the stability of the device.

Claims

1. A safety protection device for an anti-pull-out refueling machine, comprising a base (1) and a refueling machine (2) mounted on top of the base (1), wherein the refueling machine (2) is connected to a refueling nozzle (4), characterized in that: It also includes a connecting belt (7) and a housing (5). A connecting ring (8) is fixed to the top of the base (1). One end of the connecting belt (7) is fixed to the refueling nozzle (4), and the other end passes independently through the housing (5) and is fixed to the connecting ring (8). A freely rotatable shaft (16) is installed inside the housing (5). A section of the connecting belt (7) located inside the housing (5) is wound on the shaft (16). A winding assembly for driving the shaft (16) to automatically wind up the connecting belt (7) and a limiting mechanism for preventing the shaft (16) from releasing the connecting belt (7) during refueling are installed inside the housing (5).

2. The safety protection device for the anti-pull refueling machine according to claim 1, characterized in that: The winding assembly includes a first groove (9) fitted onto one end of the rotating shaft (16) and rotatably engaged therewith. The first groove (9) is fixed on the inner wall of the housing (5). A coil spring (10) is installed on the inner side of the first groove (9). When the coil spring (10) is in its natural state, the connecting belt (7) is in a straight state and the refueling nozzle (4) is placed on the refueling machine (2).

3. The safety protection device for the anti-pull refueling machine according to claim 2, characterized in that: The limiting mechanism includes a second groove (17) fixedly mounted on the other end of the rotating shaft (16). The groove of the second groove (17) faces forward and has ratchet teeth on its inner wall. An installation block (15) is provided in the lower end of the second groove (17). A pawl (14) that meshes with the ratchet teeth and prevents the second groove (17) from rotating in the direction of the release connecting belt (7) is hinged to the lower end of the installation block (15). An installation rod (12) that slides through the front side wall of the housing (5) and slides back and forth with it is installed therethrough. One end of the installation rod (12) located in the housing (5) is fixed on the installation block (15).

4. The safety protection device for the anti-pull refueling machine according to claim 3, characterized in that: The lower end of the mounting block (15) is provided with a hinge groove, and the upper end of the pawl (14) is hinged in the hinge groove. When the pawl (14) and the ratchet are engaged, the pawl (14) is in contact with the lower wall of the hinge groove and has a certain distance from the upper wall of the hinge groove.

5. The safety protection device for the anti-pull refueling machine according to claim 1, characterized in that: The refueling nozzle (4) is connected to the refueling machine (2) via the refueling pipe (3).

6. The safety protection device for the anti-pull refueling machine according to claim 5, characterized in that: The length of the connecting strip (7) is less than the length of the refueling pipe (3).

7. The safety protection device for the anti-pull refueling machine according to claim 1 or 3, characterized in that: The left and right side walls of the housing (5) are provided with through slots for the connecting belt (7) to pass through independently.

8. The safety protection device for the anti-pull refueling machine according to claim 3, characterized in that: The inner bottom of the housing (5) is fixed with a limiting block (13), which is fitted onto the mounting rod (12) and slides back and forth with it.

9. The safety protection device for the anti-pull refueling machine according to claim 1 or 3, characterized in that: The front side wall of the housing (5) is provided with a through hole for the mounting rod (12) to pass through, and a toggle plate (6) is fixed at one end of the mounting rod (12) located outside the housing (5).

10. The safety protection device for the anti-pull refueling machine according to claim 9, characterized in that: A rubber washer (11) is fixed inside the through hole to increase the friction between the mounting rod (12) and the through hole.

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