A municipal gas pipeline protection device

Abstract

The utility model relates to the field of municipal pipeline protection, especially a pipeline protection device for municipal gas, which comprises a protective shell and an observation window, the protective shell is provided with two symmetrical insertion slots, rubber blocks are arranged in the insertion slots, the protective shell is connected with the observation window through the rubber blocks, a rotating rod is arranged in the observation window, the rotating rod penetrates the outer wall on one side of the observation window, the lower end of the rotating rod is fixedly connected with a gear, a rack is fixedly connected to the outer wall on one side of the rubber block, and the gear is engaged with the rack. The device utilizes the sleeve, piston, and bidirectional one-way valve cooperative structure and the gear and rack linkage observation window quick dismounting structure, realizes the effects of efficient discharge of residual gas in the protective shell and convenient operation and reliable sealing of the observation window, and solves the problems of lack of convenient gas discharge function and quick and safe observation and maintenance channel of the existing device.

Description

Technical Field

[0001] This utility model relates to the field of municipal pipeline protection, and in particular to a pipeline protection device for municipal gas. Background Technology

[0002] Currently, municipal gas pipeline protection devices primarily focus on basic protective functions, but they suffer from significant shortcomings in safety and ease of maintenance. Existing devices generally lack effective gas replacement mechanisms. When a pipeline leaks, the gas accumulated inside the protective casing is difficult to remove quickly, requiring reliance on external equipment or natural ventilation, which is not only inefficient but also poses an explosion risk. Furthermore, the design of the observation and maintenance structure is unreasonable. Traditional observation windows are mostly fixed with bolts, requiring specialized tools for disassembly and assembly, making operations cumbersome and time-consuming, and resulting in slow response times during emergency repairs. In addition, some devices have poor sealing performance, allowing gas to easily leak from gaps in the observation window, and lack non-powered emergency handling capabilities, making it difficult to ensure maintenance safety in outdoor scenarios without power. These problems seriously affect the safe operation and maintenance efficiency of gas pipelines.

[0003] A search revealed patent publication number CN220416610U, which discloses a protective device for municipal gas pipelines. The device includes two pairs of retaining rings and a pipeline protective sleeve. Each pair of retaining rings forms a ring, with one end of each pair hinged together. A retaining plate is fixedly mounted on the other end of each retaining ring. The two retaining plates on the same pair of retaining rings are connected by nuts and bolts. A sealing gasket is attached to the inner surface of each retaining ring. The pipeline protective sleeve is telescopic, and a groove is provided on the inner end face of each retaining ring. This groove is adapted to the two ends of the pipeline protective sleeve, which are then sealed and inserted into the groove. In use, the pipeline protective sleeve is fitted over the gas pipeline connection and sealed. A protective device is installed on the outside of the two gas pipeline connections, ensuring that even if a leak occurs at the connection, the normal operation of the gas pipeline will not be affected for a short period.

[0004] While existing technologies can achieve a certain level of protection during use, they suffer from drawbacks such as the lack of convenient gas discharge functions and quick and safe observation and maintenance channels. In view of this, we propose a pipeline protection device for municipal gas that solves the above problems. Utility Model Content

[0005] The purpose of this utility model is to address the problems existing in the background technology by proposing a pipeline protection device for municipal gas.

[0006] The technical solution of this utility model is as follows: A protective device for municipal gas pipelines includes a protective shell and an observation window. The protective shell has two symmetrical slots, and a rubber block is placed in each slot. The protective shell is connected to the observation window through the rubber block. A rotating rod is placed inside the observation window and passes through one side of the outer wall of the observation window. The lower end of the rotating rod is fixedly connected to a gear. A rack is fixedly connected to one side of the outer wall of the rubber block. The gear meshes with the rack, and the rotation of the gear can simultaneously drive the two rubber blocks to move towards or away from each other.

[0007] When using one of the municipal gas pipeline protection devices in this solution, the protective shell is fitted onto the municipal gas pipeline with the sleeve positioned below the pipeline (air is denser than gas, so air is injected from below, which can more thoroughly remove the gas inside the protective shell). The upper and lower mounting plates are connected with bolts to fix the protective shell onto the pipeline. The rubber rings at both ends of the inner wall of the protective shell seal the inside of the shell, forming a sealed space. When the pipeline ruptures and leaks, the gas will be temporarily blocked inside the protective shell to prevent gas leakage. During maintenance, the condition inside the pipeline can be observed through the glass plate of the observation window. The upstream valve of the pipeline is closed, the knob is turned to disengage the rubber block from the slot, the handle is pulled to remove the observation window, and the second handle is pushed and pulled repeatedly. The piston moves inside the sleeve, and air is injected into the protective shell through the second and first one-way valves, blowing out the residual gas inside the protective shell. Workers can then perform pipeline repairs in a safe environment.

[0008] Preferably, the upper outer wall of the rotating rod is fixedly connected to the knob, the knob is located on one side of the outer wall of the observation window, and a first handle is fixedly connected to one side of the outer wall of the observation window. The knob can control the movement of the rubber block.

[0009] Preferably, a guide rod is fixedly connected to the outer wall of the other side of the rubber block, and two limiting grooves are provided in the observation window. The guide rod is respectively provided in the limiting grooves, and the guide rod can only move in a straight line along the limiting groove.

[0010] Preferably, a sleeve is fixedly connected to the lower outer wall of the protective shell, a piston is provided inside the sleeve, and a second one-way valve is provided on the piston. The path of the second one-way valve is external air, the second one-way valve, and the interior of the upper end of the sleeve.

[0011] Preferably, a connecting rod is fixedly connected to the lower outer wall of the piston, and a second handle is fixedly connected to the lower outer wall of the connecting rod. The second handle facilitates the movement of the piston.

[0012] Preferably, the lower end of the protective shell is provided with a first one-way valve, which is connected to the sleeve, and the path of the first one-way valve is the sleeve, the first one-way valve, and the inside of the protective shell.

[0013] Preferably, the observation window is provided with a glass plate, which is located between the guide groove and the rack, and the installation position of the glass plate does not affect the movement of the rubber block.

[0014] Preferably, the protective shell is provided with two sets of symmetrical mounting plates, which are fixedly connected by bolts. Rubber rings are fixedly connected to the inner walls of both ends of the protective shell. The protective shell is provided with a pin, which allows the protective shell to rotate on both sides, facilitating installation with pipelines.

[0015] Compared with existing technologies, the advantages of this utility model are:

[0016] This invention features a gear and rack linkage rubber block locking structure for the observation window. Combined with the convenient operation of the knob and the first handle, it enables rapid installation and disassembly. Turning the knob drives the rubber block to simultaneously insert or disengage from the slot via gear transmission, completing the locking or unlocking of the observation window. The entire process requires no tools and can be completed quickly by a single person. This design ensures the airtight connection between the observation window and the protective shell while significantly improving response speed during maintenance. After gas replacement, staff can quickly remove the observation window to perform emergency repairs on the pipeline, reducing the impact of gas supply interruptions caused by prolonged equipment disassembly and assembly. It also facilitates daily visual inspection of the pipeline status through the glass panel, balancing safety and maintenance efficiency.

[0017] Based on the first beneficial effect, a highly efficient manual gas replacement system was constructed through the coordinated design of a sleeve, piston, and two one-way valves. When a pipeline leak occurs, workers can reciprocate by pushing and pulling the second handle to drive the piston. Outside air is drawn into the sleeve through the second one-way valve and then directionally injected into the protective casing through the first one-way valve. Utilizing the density characteristics of air, it fills from the bottom up, creating a continuous positive pressure that completely expels any remaining leaked gas from the protective casing. This design requires no external power source, is simple to operate, and has high replacement efficiency. It can quickly reduce the gas concentration inside the protective casing to a safe range, creating a safe working environment for maintenance personnel and effectively avoiding the risk of gas explosion or poisoning.

[0018] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0019] Figure 1 This is a top view of the entire utility model;

[0020] Figure 2 This is a bottom view of the overall design of this utility model;

[0021] Figure 3 This is a schematic diagram of the observation window structure of this utility model;

[0022] Figure 4 This is a cross-sectional view of the observation window of this utility model;

[0023] Figure 5 This is a schematic diagram of the internal structure of the sleeve of this utility model.

[0024] Figure label:

[0025] 1. Protective shell; 2. Mounting plate; 3. Bolt; 4. First check valve; 5. Rubber ring; 6. Pin; 7. Slot; 8. Rubber block; 9. Rotary rod; 10. Knob; 11. Observation window; 12. First handle; 13. Rack; 14. Gear; 15. Limiting groove; 16. Guide rod; 17. Piston; 18. Second check valve; 19. Sleeve; 20. Second handle; 21. Connecting rod; 22. Glass plate. Detailed Implementation

[0026] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0027] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Example

[0030] Please see Figures 1-5As shown, this embodiment is a protective device for municipal gas pipelines, including a protective shell 1 and an observation window 11. The protective shell 1 has two symmetrical slots 7, and rubber blocks 8 are installed in the slots 7. The protective shell 1 is connected to the observation window 11 through the rubber blocks 8. A rotating rod 9 is installed in the observation window 11, and the rotating rod 9 passes through one side of the outer wall of the observation window 11. The lower end of the rotating rod 9 is fixedly connected to a gear 14. A rack 13 is fixedly connected to one side of the outer wall of the rubber block 8. The gear 14 meshes with the rack 13. In use, rotating the rotating rod 9 can drive the gear 14 to rotate synchronously. Through the meshing transmission of the gear 14 and the rack 13, the two rubber blocks 8 are driven to move synchronously in opposite directions or in opposite directions in the horizontal direction, thereby quickly completing the connection and fixation or separation and disassembly of the observation window 11 and the protective shell 1. Example

[0031] Please see Figures 1-5 As shown, this embodiment, based on embodiment 1, further includes: the upper outer wall of the rotating rod 9 is fixedly connected to the knob 10, the knob 10 is located on one side of the outer wall of the observation window 11, and a first handle 12 is fixedly connected to one side of the outer wall of the observation window 11. In use, the operator can easily drive the rotating rod 9 to rotate by rotating the knob 10 without the need for tools, making the operation labor-saving and convenient; when the rubber block 8 is disengaged from the slot 7, the first handle 12 can be held to smoothly pull the observation window 11, realizing the quick removal of the observation window 11, which facilitates subsequent maintenance operations on the internal pipes of the protective shell 1.

[0032] A guide rod 16 is fixedly connected to the outer wall of the other side of the rubber block 8. Two limiting grooves 15 are provided in the observation window 11. The guide rod 16 is respectively located in the limiting grooves 15. When the rubber block 8 moves under the drive of the gear 14 and rack 13, the guide rod 16 slides in a straight line along the limiting groove 15, which forms a precise constraint on the movement trajectory of the rubber block 8, preventing the rubber block 8 from being misaligned with the slot 7 due to force deviation, ensuring that the rubber block 8 can be smoothly inserted into or detached from the slot 7, and ensuring the stability and sealing of the connection of the observation window 11.

[0033] A sleeve 19 is fixedly connected to the lower outer wall of the protective shell 1. A piston 17 is provided inside the sleeve 19. A second one-way valve 18 is provided on the piston 17. In use, when the piston 17 is pushed upward, the air above the piston 17 in the sleeve 19 is compressed. The second one-way valve 18 closes due to its one-way conduction characteristic to prevent air from flowing out in the opposite direction. When the piston 17 is pulled downward, a negative pressure is formed inside the sleeve 19. The second one-way valve 18 opens automatically, and outside air enters the inside of the sleeve 19 through the second one-way valve 18, completing the air intake action.

[0034] A connecting rod 21 is fixedly connected to the lower outer wall of the piston 17, and a second handle 20 is fixedly connected to the lower outer wall of the connecting rod 21. During use, the operator can easily control the up-and-down reciprocating movement of the piston 17 by holding the second handle 20. The connecting rod 21 effectively transmits the hand force to the piston 17, realizing the intake and compression of air in the sleeve 19. No additional tools are required, making it suitable for outdoor maintenance scenarios without a power source.

[0035] The lower end of the protective shell 1 is provided with a first one-way valve 4, which is connected to the sleeve 19. In use, when the piston 17 inside the sleeve 19 pushes the compressed air upward, the first one-way valve 4 opens under the action of air pressure, and the compressed air inside the sleeve 19 is continuously injected into the protective shell 1 through the first one-way valve 4. When the piston 17 is pulled downward to draw in air, the first one-way valve 4 automatically closes due to its one-way conduction characteristic, preventing the gas inside the protective shell 1 from flowing back to the sleeve 19 and ensuring that the air enters the protective shell 1 in a directional manner.

[0036] The observation window 11 is equipped with a glass plate 22, which is located between the guide groove and the rack 13. When in use, the glass plate 22 is made of high-strength transparent material. The staff can clearly observe the operation status of the internal pipe of the protective shell 1 through the glass plate 22 without disassembling the observation window 11. The rubber block 8 isolates the transmission components such as the gear 14 and rack 13 from the external environment to prevent dust and moisture from entering and affecting the transmission accuracy.

[0037] The protective shell 1 is provided with two sets of symmetrical mounting plates 2, which are fixedly connected by bolts 3. Rubber rings 5 ​​are fixedly connected to the inner walls of both ends of the protective shell 1. The protective shell 1 is provided with a pin 6. Before installation, the protective shell 1 can be rotated around the pin 6 to smoothly fit it onto the outside of the gas pipeline. By tightening the bolts 3 on the mounting plate 2, the protective shell 1 is made to fit tightly against the pipeline. The rubber rings 5 ​​at both ends undergo elastic deformation under the pressure, filling the gap between the protective shell 1 and the pipeline, forming a sealed space, and effectively preventing the gas leaking from the pipeline from spreading outward.

[0038] Instructions for use: When using this device, attach the protective shell 1 to the municipal gas pipeline, with the sleeve 19 positioned below the pipeline (air is denser than gas, so air is injected from below, which can more thoroughly remove the gas inside the protective shell 1). Connect the upper and lower mounting plates 2 with bolts 3 to fix the protective shell 1 to the pipeline. The rubber rings 5 ​​at both ends of the inner wall of the protective shell 1 seal the inside of the protective shell 1, forming a sealed space. When the pipeline ruptures and leaks, the gas will be temporarily blocked inside the protective shell 1 to prevent gas leakage. During maintenance, observe the inside of the pipeline through the glass plate 22 of the observation window 11. Close the upstream valve of the pipeline, turn the knob 10 to disengage the rubber block 8 from the slot 7, pull the handle to remove the observation window 11, and repeatedly push and pull the second handle 20. The piston 17 moves inside the sleeve 19, and air is injected into the protective shell 1 through the second one-way valve 18 and the first one-way valve 4, blowing out the residual gas inside the protective shell 1. The operator can then perform pipeline repair operations in a safe environment.

[0039] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A protective device for municipal gas pipelines, comprising a protective shell (1) and an observation window (11), characterized in that: The protective shell (1) is provided with two symmetrical slots (7), and a rubber block (8) is provided in the slot (7). The protective shell (1) is connected to the observation window (11) through the rubber block (8). A rotating rod (9) is provided in the observation window (11). The rotating rod (9) passes through the outer wall of one side of the observation window (11). The lower end of the rotating rod (9) is fixedly connected to a gear (14). A rack (13) is fixedly connected to the outer wall of one side of the rubber block (8). The gear (14) meshes with the rack (13).

2. The municipal gas pipeline protection device according to claim 1, characterized in that: The upper outer wall of the rotating rod (9) is fixedly connected to the knob (10), the knob (10) is located on one side of the outer wall of the observation window (11), and a first handle (12) is fixedly connected to one side of the outer wall of the observation window (11).

3. A municipal gas pipeline protection device according to claim 1, characterized in that: A guide rod (16) is fixedly connected to the outer wall of the other side of the rubber block (8). Two limiting grooves (15) are provided in the observation window (11), and the guide rod (16) is respectively located in the limiting groove (15).

4. A municipal gas pipeline protection device according to claim 1, characterized in that: A sleeve (19) is fixedly connected to the lower outer wall of the protective shell (1). A piston (17) is provided inside the sleeve (19), and a second one-way valve (18) is provided on the piston (17).

5. A municipal gas pipeline protection device according to claim 4, characterized in that: A connecting rod (21) is fixedly connected to the lower outer wall of the piston (17), and a second handle (20) is fixedly connected to the lower outer wall of the connecting rod (21).

6. A municipal gas pipeline protection device according to claim 1, characterized in that: The lower end of the protective shell (1) is provided with a first one-way valve (4), which is connected to the sleeve (19).

7. A municipal gas pipeline protection device according to claim 1, characterized in that: The observation window (11) is provided with a glass plate (22), which is located between the guide groove and the rack (13).

8. A municipal gas pipeline protection device according to claim 6, characterized in that: The protective shell (1) is provided with two sets of symmetrical mounting plates (2), which are fixedly connected by bolts (3). Rubber rings (5) are fixedly connected to the inner walls at both ends of the protective shell (1), and the protective shell (1) is provided with a pin (6).

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