Automatic water spraying fire extinguishing system

Abstract

The utility model relates to the technical field of fire fighting, and discloses an automatic water-spraying fire-extinguishing system which comprises a building body, a first mounting frame, a first fire-fighting water tank and a second fire-fighting water tank are arranged on the outer side of the building body, and a first water pump is fixedly mounted on the inner side of the first mounting frame; and a first water pipe is arranged between the first water pump and the first fire water tank. According to the automatic water-spraying fire extinguishing system, after the detection assembly monitors and confirms a fire, the fire-fighting sprayers in the effective fire extinguishing area are immediately opened, the initial fire is really, rapidly and effectively extinguished, the fire extinguishing water amount is reduced, fire extinguishing is stopped after the detection assembly monitors and confirms that the fire is extinguished, and the practicability is high; through cooperation of the guide block and the guide groove, rapid positioning of the fire sprinkler can be achieved, follow-up limiting is facilitated, through cooperation of the limiting rod, the first through hole and the second through hole, rapid limiting of the fire sprinkler can be achieved, and the fire sprinkler can be conveniently overhauled after being used for a long time.

Description

Technical Field

[0001] This utility model relates to the field of fire protection technology, specifically to an automatic sprinkler system. Background Technology

[0002] Automatic sprinkler systems are comprehensive safety devices that integrate detection, alarm, and fire extinguishing functions. They utilize advanced sensor technology and automated control methods to achieve early warning and rapid response to fires. Automatic sprinkler systems can be used in various public places, underground garages, warehouses, home kitchens, engine rooms of small fishing boats, and other scenarios. Traditionally, when a fire occurs, it is necessary to manually extinguish it with a handheld fire extinguisher, which is inconvenient and results in a slow response, easily delaying the fire extinguishing opportunity and causing significant economic losses or casualties.

[0003] As prior art, Chinese utility model patent CN208525702U discloses an indoor automatic sprinkler system. This indoor automatic sprinkler system uses temperature sensors and smoke sensors to detect the ambient temperature and smoke concentration in the indoor environment, respectively. Considering the characteristics of low temperature and dense smoke in the initial stage of a fire, a low temperature sensing threshold and an appropriate smoke sensing threshold are set. After the initial fire is detected, the electrical control circuit is closed, the electric valve is opened, and the sprinkler head sprays water to extinguish the fire. After the initial fire is extinguished, when the temperature sensor and smoke sensor detect that the temperature is below the set threshold, the electrical control circuit is disconnected, the electric valve is closed, and the sprinkler head stops working.

[0004] This type of indoor automatic sprinkler system uses a combination of temperature and smoke sensors to detect fires. However, it is limited by the size of the flames, the building height, and the ambient temperature. Often, the system is slow to respond when the fire has reached a certain level, which affects the timely extinguishing of the fire. Furthermore, it lacks a quick-installation structure for the fire sprinklers, making it difficult to maintain after prolonged use. As a result, it has low practicality and is not suitable for widespread adoption. Summary of the Invention

[0005] The technical problem this utility model aims to solve is to provide an automatic sprinkler fire extinguishing system that effectively addresses the limitations of existing technologies that use a combination of temperature and smoke sensors to detect fires. These systems are affected by factors such as the size of the flames, building height, and ambient temperature, often resulting in delayed detection once the fire has reached a certain intensity. This hinders the timely extinguishing of fires by the automatic sprinkler system. Furthermore, the lack of a quick-installation structure for the fire sprinklers makes maintenance difficult after prolonged use, resulting in low practicality and limited applicability.

[0006] The technical solution adopted by this utility model is: an automatic sprinkler fire extinguishing system, relating to the building body. The building body has a first mounting frame, a first fire water tank, and a second fire water tank installed on its outer side. A first water pump is fixedly installed on the inner side of the first mounting frame. A first water pipe is installed between the first water pump and the first fire water tank. A second water pump is fixedly installed on the inner side of the first mounting frame. A second water pipe is installed between the second water pump and the second fire water tank. A third water pipe is installed inside the first mounting frame. A fourth water pipe is installed between the third water pipe and the first water pump. A fifth water pipe is installed between the third water pipe and the second water pump. The top of the sub-body is equipped with a sixth water pipe and a seventh water pipe. A connector is fixedly installed on the outside of the seventh water pipe. A first through hole and a guide groove are opened on the outside of the connector. A fire sprinkler head is installed at the end of the connector away from the seventh water pipe. A guide block and a positioning block are fixedly installed at the end of the fire sprinkler head near the connector. A second through hole is opened at the end of the fire sprinkler head near the connector. An installation groove is opened on the outside of the positioning block. A sealing ring is installed on the inside of the installation groove. A limit rod is inserted and installed on the outside of the connector. A detection component and an alarm component are installed inside the house body. An electrical control cabinet is fixedly installed on the inside of the first mounting bracket.

[0007] Preferably, the first, second, third, fourth, fifth, sixth, and seventh water pipes are interconnected, and multiple identical fire sprinklers are provided, with the multiple fire sprinklers distributed at equal intervals at the top of the interior of the house.

[0008] With the above technical solution, when a fire occurs, the detection component transmits a signal to the electrical control cabinet, which then starts the first water pump. The first water pump draws water from the first fire water tank through the first water pipe, and then discharges it into the seventh water pipe through the third, fourth, fifth, and sixth water pipes. The water is then sprayed out through the fire sprinklers, which can quickly extinguish the fire source and effectively extinguish the initial fire. It also reduces the amount of water used for fire extinguishing and has high practicality. The design of multiple fire sprinklers further improves the fire extinguishing efficiency.

[0009] Preferably, the positioning block and the connector are plug-in installed, the guide block and the guide groove are plug-in installed, and the cross-section of the guide block has an "L" shaped structure.

[0010] Using the above technical solution, workers insert the positioning block into the inside of the connector and then insert the guide block into the inside of the guide groove, which can achieve rapid positioning of the fire sprinkler head and facilitate subsequent limiting.

[0011] Preferably, the limiting rod passes through the first through hole and the second through hole, and the first through hole and the second through hole have the same diameter.

[0012] With the above technical solution, after the fire sprinkler head is quickly positioned, the staff then inserts the limiting rod through the first and second through holes, making it less likely for the fire sprinkler head to shake. This allows for quick positioning of the fire sprinkler head and facilitates maintenance after long-term use.

[0013] Preferably, the sealing ring is a rubber ring, and three identical sealing rings are provided, with the three sealing rings distributed at equal intervals.

[0014] The above technical solution utilizes the rubber ring's excellent sealing properties. The design of the sealing ring prevents water from leaking out of the connection gap, resulting in a high level of sealing performance. The design of three sealing rings further enhances the sealing performance.

[0015] Preferably, the detection component includes a second mounting bracket, a first motor, a mounting base, a second motor, a mounting plate, a positioning groove, a sliding groove, a plug rod, a limiting block, a camera, a slot, a limiting groove, a slot, and a buckle. The first motor is fixedly mounted on the outer side of the second mounting bracket, the output end of the first motor is fixedly mounted on the mounting base, the second motor is fixedly mounted on the outer side of the mounting base, the output end of the second motor is fixedly mounted on the mounting plate, the outer side of the second motor has a positioning groove and a sliding groove, the inner side of the positioning groove has a plug rod fixedly mounted, the inner side of the sliding groove has a limiting block slidably connected, the outer side of the mounting plate has a camera, the outer side of the camera has a slot, a limiting groove, and a slot, the outer side of the limiting block has a buckle fixedly mounted, the plug rod and the slot are plug-in mounted, and the camera and the positioning groove are plug-in mounted.

[0016] Using the above technical solution, the staff inserts the camera into the positioning slot and inserts the rod into the slot, which enables the camera to be quickly positioned and facilitates subsequent positioning.

[0017] Preferably, the buckle and the slot are adapted to each other, the sliding groove and the limiting groove are connected, and the limiting block is adapted to the limiting groove.

[0018] With the above technical solution, after the camera is quickly positioned, the staff slides the limiting block into the limiting groove. When the buckle comes into contact with the camera, the buckle deforms. When the limiting block is completely submerged in the limiting groove, the buckle returns to its original shape, so that the buckle is engaged in the groove. This can achieve quick positioning of the camera and facilitate maintenance after long-term use.

[0019] Compared with the prior art, this utility model provides an automatic sprinkler fire extinguishing system, which has the following beneficial effects:

[0020] 1. This automatic sprinkler system detects and confirms a fire using its detection components, and can immediately activate the fire sprinklers within the effective fire suppression area to quickly and effectively extinguish initial fires while reducing the amount of water used for fire suppression. Once the fire is detected and confirmed to be extinguished, the system can immediately stop fire suppression, making it highly practical. Due to the excellent sealing properties of the rubber rings, the design of the sealing rings prevents water from leaking out from the connection gaps, resulting in high sealing performance. The design of three sealing rings further enhances the sealing performance.

[0021] 2. This automatic sprinkler system can quickly position the fire sprinkler head through the cooperation of the guide block and the guide groove, facilitating subsequent limiting. Through the cooperation of the limiting rod, the first through hole and the second through hole, the fire sprinkler head can be quickly limited, facilitating maintenance after long-term use. Through the cooperation of the plug rod and the slot, the camera can be quickly positioned, facilitating subsequent limiting. Through the cooperation of the buckle and the slot with the limiting block, the sliding groove and the limiting groove, the camera can be quickly limited, facilitating maintenance after long-term use. Attached Figure Description

[0022] Figure 1 This is a first-view three-dimensional structural diagram of the intelligent automatic sprinkler fire extinguishing system of this utility model;

[0023] Figure 2 This is a second-view three-dimensional structural diagram of the intelligent automatic sprinkler fire extinguishing system of this utility model;

[0024] Figure 3 This is a schematic diagram of the installation structure of the first and second fire water tanks of this utility model;

[0025] Figure 4 This is a schematic diagram of the installation structure of the fire sprinkler head of this utility model;

[0026] Figure 5 This is a schematic diagram of the sealing ring installation structure of this utility model;

[0027] Figure 6 This is a schematic diagram of the connector installation structure of this utility model;

[0028] Figure 7 This is a schematic diagram of the installation structure of the detection component of this utility model;

[0029] Figure 8 This is a schematic diagram of the first-view structure for installing the camera in this utility model;

[0030] Figure 9 This is a schematic diagram of the first-view structure for installing the camera of this utility model.

[0031] The components include: 1. Building body; 2. First mounting bracket; 3. First fire water tank; 4. Second fire water tank; 5. First water pump; 6. First water pipe; 7. Second water pump; 8. Second water pipe; 9. Third water pipe; 10. Fourth water pipe; 11. Fifth water pipe; 12. Sixth water pipe; 13. Seventh water pipe; 14. Connector; 15. First through hole; 16. Guide groove; 17. Fire sprinkler head; 18. Guide block; 19. Positioning block; 20. Second through hole; 21. Mounting groove; 22. Sealing ring; 23. Limiting rod; 24. Detection component; 2401. Second mounting bracket; 2402. First motor; 2403. Mounting base; 2404. Second motor; 2405. Mounting plate; 2406. Positioning groove; 2407. Slide groove; 2408. Insert rod; 2409. Limiting block; 2410. Camera; 2411. Slot; 2412. Limiting groove; 2413. Card slot; 2414. Buckle; 25. Electrical control cabinet; 26. Alarm component. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Example 1:

[0034] like Figure 1-9 As shown in the figure, this example provides a basic structural example of an automatic sprinkler fire extinguishing system.

[0035] Based on the diagram, the automatic sprinkler fire extinguishing system shown in this example specifically includes a building body 1. A first mounting bracket 2, a first fire water tank 3, and a second fire water tank 4 are installed on the outside of the building body 1. A first water pump 5 is fixedly installed inside the first mounting bracket 2. A first water pipe 6 is installed between the first water pump 5 and the first fire water tank 3. A second water pump 7 is fixedly installed inside the first mounting bracket 2. A second water pipe 8 is installed between the second water pump 7 and the second fire water tank 4. A third water pipe 9 is installed inside the first mounting bracket 2. A fourth water pipe 10 is installed between the third water pipe 9 and the first water pump 5. A fifth water pipe 11 is installed between the third water pipe 9 and the second water pump 7. A third water pipe 11 is installed at the top of the interior of the building body 1. The sixth water pipe 12 and the seventh water pipe 13 are provided. A connector 14 is fixedly installed on the outside of the seventh water pipe 13. A first through hole 15 and a guide groove 16 are opened on the outside of the connector 14. A fire sprinkler head 17 is provided at the end of the connector 14 away from the seventh water pipe 13. A guide block 18 and a positioning block 19 are fixedly installed at the end of the fire sprinkler head 17 near the connector 14. A second through hole 20 is opened at the end of the fire sprinkler head 17 near the connector 14. An installation groove 21 is opened on the outside of the positioning block 19. A sealing ring 22 is provided on the inside of the installation groove 21. A limit rod 23 is inserted and installed on the outside of the connector 14. A detection component 24 and an alarm component 26 are provided inside the house body 1. An electrical control cabinet 25 is fixedly installed on the inside of the first mounting bracket 2.

[0036] For further explanation, see Figure 3 and Figure 4 In this example, the first water pipe 6, the second water pipe 8, the third water pipe 9, the fourth water pipe 10, the fifth water pipe 11, the sixth water pipe 12 and the seventh water pipe 13 are connected. Multiple identical fire sprinklers 17 are installed, and the multiple fire sprinklers 17 are distributed at equal intervals at the top of the interior of the house body 1.

[0037] With this setup, when a fire occurs, the detection component 24 transmits a signal to the electrical control cabinet 25. The electrical control cabinet 25 then starts the first water pump 5. The first water pump 5 draws water from the first fire water tank 3 through the first water pipe 6, and then discharges it into the seventh water pipe 13 through the third water pipe 9, the fourth water pipe 10, the fifth water pipe 11, and the sixth water pipe 12. The water is then sprayed out through the fire sprinkler head 17, which can quickly extinguish the fire source and effectively extinguish the initial fire. It also reduces the amount of water used for extinguishing the fire and has high practicality. The design of multiple fire sprinkler heads 17 further improves the fire extinguishing efficiency.

[0038] For further explanation, see Figure 4 and Figure 5 In this example, the positioning block 19 and the connector 14 are plugged in, the guide block 18 and the guide groove 16 are plugged in, and the cross section of the guide block 18 has an "L" shaped structure.

[0039] With this setup, the operator inserts the positioning block 19 into the interior of the connector 14 and then inserts the guide block 18 into the interior of the guide groove 16, which enables the fire sprinkler head 17 to be quickly positioned, facilitating subsequent positioning.

[0040] For further explanation, see Figure 3 and Figure 4 In this example, the limiting rod 23 passes through the first through hole 15 and the second through hole 20, and the diameters of the first through hole 15 and the second through hole 20 are the same. With this configuration, after the fire sprinkler head 17 is quickly positioned, the operator can then pass the limiting rod 23 through the first through hole 15 and the second through hole 20, making it less likely for the fire sprinkler head 17 to shake. This allows for quick positioning of the fire sprinkler head 17 and facilitates maintenance after prolonged use.

[0041] Example 2:

[0042] This example provides an optimized solution based on the solution in Example 1.

[0043] See Figure 5 In this example, a rubber ring is used for the sealing ring 22, and three identical sealing rings 22 are provided, with the three sealing rings 22 being distributed at equal intervals.

[0044] With this design, the rubber ring has good sealing properties, and the design of the sealing ring 22 prevents water from leaking out from the connection gap, resulting in a high level of sealing performance. The design of three sealing rings 22 further improves the sealing performance.

[0045] See Figures 7-9 This example presents a specific configuration scheme for the detection component 24.

[0046] Based on the illustration, the detection component 24 specifically includes a second mounting bracket 2401, a first motor 2402, a mounting base 2403, a second motor 2404, a mounting plate 2405, a positioning groove 2406, a sliding groove 2407, an insertion rod 2408, a limiting block 2409, a camera 2410, a slot 2411, a limiting groove 2412, a card slot 2413, and a buckle 2414.

[0047] The first motor 2402 is fixedly mounted on the outer side of the second mounting bracket 2401. The output end of the first motor 2402 is fixedly mounted on the mounting base 2403. The second motor 2404 is fixedly mounted on the outer side of the mounting base 2403. The output end of the second motor 2404 is fixedly mounted on the mounting plate 2405. The outer side of the second motor 2404 is provided with a positioning groove 2406 and a sliding groove 2407. The inner side of the positioning groove 2406 is fixedly mounted with a plug rod 2408. The inner side of the sliding groove 2407 is slidably connected with a limit block 2409. The outer side of the mounting plate 2405 is provided with a camera 2410. The outer side of the camera 2410 is provided with a slot 2411, a limit groove 2412 and a card slot 2413. The outer side of the limit block 2409 is fixedly mounted with a buckle 2414. The plug rod 2408 and the slot 2411 are plugged in and installed together. The camera 2410 and the positioning groove 2406 are plugged in and installed together.

[0048] Furthermore, the camera 2410 here is specifically a fire detection camera, which can detect fire situations within the monitoring range and generate an alarm signal after confirming a fire. The specific structure and function of the fire detection camera are existing technology for those skilled in the art and will not be elaborated here. For example, the camera 2410 can be a Hikvision fire alarm camera.

[0049] With the detection component 24 configured in this way, the operator inserts the camera 2410 into the positioning slot 2406 and inserts the rod 2408 into the slot 2411, which enables the camera 2410 to be quickly positioned, facilitating subsequent positioning.

[0050] Specifically, the buckle 2414 and the slot 2413 are compatible, the slide 2407 and the limiting slot 2412 are connected, and the limiting block 2409 is compatible with the limiting slot 2412. With this configuration, after the camera 2410 is quickly positioned, the operator slides the limiting block 2409 into the limiting slot 2412. When the buckle 2414 contacts the camera 2410, the buckle 2414 deforms. When the limiting block 2409 is completely submerged in the limiting slot 2412, the buckle 2414 returns to its original shape, allowing it to engage with the slot 2413. This enables rapid positioning of the camera 2410 and facilitates maintenance after prolonged use.

[0051] The following example illustrates the specific operation process of the automatic sprinkler fire extinguishing system formed by the above-mentioned solution.

[0052] Combination Figures 1 to 9During installation, the automatic sprinkler fire extinguishing system allows for quick positioning of the camera 2410 by inserting it into the positioning slot 2406 and the insertion rod 2408 into the slot 2411. This facilitates subsequent positioning. After positioning the camera 2410, the operator slides the limiting block 2409 into the limiting slot 2412. When the latch 2414 contacts the camera 2410, it deforms. When the limiting block 2409 is fully submerged in the limiting slot 2412, the latch 2414 returns to its original shape, locking into the slot 2413. This allows for quick positioning of the camera 2410 and facilitates maintenance after prolonged use.

[0053] Subsequently, the staff inserts the positioning block 19 into the interior of the connector 14, and then inserts the guide block 18 into the interior of the guide groove 16, which can realize the rapid positioning of the fire sprinkler head 17, making it convenient for subsequent limiting. After the fire sprinkler head 17 is quickly positioned, the staff then inserts the limiting rod 23 through the first through hole 15 and the second through hole 20, making the fire sprinkler head 17 less prone to shaking, which can realize the rapid limiting of the fire sprinkler head 17, and facilitates its maintenance after long-term use.

[0054] In use, the staff first connects the external power supply. When a fire occurs, the detection component 24 detects and confirms the fire (the fire detection and confirmation scheme can be implemented using existing technology, which will not be elaborated here). The detection component 24 will generate a detection signal and transmit it to the electrical control cabinet 25. Then, the electrical control cabinet 25 starts the first water pump 5. The first water pump 5 draws water from the first fire water tank 3 through the first water pipe 6, and then discharges it into the seventh water pipe 13 through the third water pipe 9, the fourth water pipe 10, the fifth water pipe 11 and the sixth water pipe 12. Then, it is sprayed out through the fire sprinkler head 17, which can quickly extinguish the fire source and achieve truly rapid and effective extinguishing of the initial fire. It also reduces the amount of fire extinguishing water and has high practicality. The design of multiple fire sprinkler heads 17 further improves the fire extinguishing efficiency.

[0055] Once the detection component 24 detects and confirms that the fire has been extinguished, the firefighting will stop. Because the rubber ring has good sealing performance, the design of the sealing ring 22 prevents water from leaking out from the connection gap, and the sealing performance is high. The design of three sealing rings 22 further improves the sealing performance.

[0056] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. Automatic sprinkler system, comprising a house body (1), characterized in that: The house body (1) outside is provided with first mounting frame (2), first fire water tank (3) and second fire water tank (4), the inner side of first mounting frame (2) is fixedly installed with first water pump (5), first water pump (5) and first fire water tank (3) between being provided with first water pipe (6), the inner side of first mounting frame (2) is fixedly installed with second water pump (7), second water pump (7) and second fire water tank (4) between being provided with second water pipe (8), the inside of first mounting frame (2) is provided with third water pipe (9), fourth water pipe (10) is arranged between third water pipe (9) and first water pump (5), fifth water pipe (11) is arranged between third water pipe (9) and second water pump (7), the top of the inside of house body (1) is provided with sixth water pipe (12) and seventh water pipe (13), the outer side of seventh water pipe (13) is fixedly installed with connector (14), the outer side of connector (14) is provided with first through hole (15) and guide slot (16), the end, away from seventh water pipe (13), of connector (14) is provided with fire sprinkler (17), the end, close to connector (14), of fire sprinkler (17) is fixedly installed with guide block (18) and positioning block (19), the end, close to connector (14), of fire sprinkler (17) is provided with second through hole (20), the outer side of positioning block (19) is provided with mounting groove (21), the inner side of mounting groove (21) is provided with sealing ring (22), the outer side of connector (14) is insertedly installed with limiting rod (23), the inside of house body (1) is provided with detection assembly (24) and alarm assembly (26), the inner side of first mounting frame (2) is fixedly installed with electric control cabinet (25).

2. The automatic sprinkler system according to claim 1, wherein: The first water pipe (6), second water pipe (8), third water pipe (9), fourth water pipe (10), fifth water pipe (11), sixth water pipe (12) and seventh water pipe (13) are communicated, the fire sprinkler (17) is provided with the same plurality, a plurality of fire sprinkler (17) is distributed at the top of the inside of house body (1) with equal interval.

3. The automatic sprinkler system of claim 1, wherein: The positioning block (19) and connector (14) are insertedly installed, the guide block (18) and guide slot (16) are insertedly installed, the cross section of guide block (18) is in the form of "L" letter type structure.

4. The automatic sprinkler system of claim 1, wherein: The limiting rod (23) penetrates first through hole (15) and second through hole (20), the first through hole (15) and the second through hole (20) have the same aperture.

5. The automatic sprinkler system of claim 1, wherein: The sealing ring (22) is rubber ring, the sealing ring (22) is provided with the same three, three sealing rings (22) are distributed with equal interval.

6. The automatic sprinkler system of claim 1, wherein: The detection assembly (24) comprises a second mounting frame (2401), a first motor (2402), a mounting seat (2403), a second motor (2404), a mounting plate (2405), a positioning groove (2406), a sliding groove (2407), a plug rod (2408), a limiting block (2409), a camera (2410), a slot (2411), a limiting groove (2412), a clamping groove (2413) and a buckle (2414), the outer side of the second mounting frame (2401) is fixedly installed with the first motor (2402), the output end of the first motor (2402) is fixedly installed with the mounting seat (2403), the outer side of the mounting seat (2403) is fixedly installed with the second motor (2404), the output end of the second motor (2404) is fixedly installed with the mounting plate (2405), the outer side of the second motor (2404) is provided with the positioning groove (2406) and the sliding groove (2407), the inner side of the positioning groove (2406) is fixedly installed with the plug rod (2408), the inner side of the sliding groove (2407) is slidably connected with the limiting block (2409), the outer side of the mounting plate (2405) is provided with the camera (2410), the outer side of the camera (2410) is provided with the slot (2411), the limiting groove (2412) and the clamping groove (2413), the outer side of the limiting block (2409) is fixedly installed with the buckle (2414), the plug rod (2408) and the slot (2411) are in plug connection, and the camera (2410) and the positioning groove (2406) are in plug connection.

7. The automatic sprinkler system of claim 6, wherein: The buckle (2414) and the clamping groove (2413) are matched, the sliding groove (2407) and the limiting groove (2412) are communicated, and the limiting block (2409) and the limiting groove (2412) are matched.

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