A salted duck egg packaging machine

Abstract

The utility model relates to the field of salted duck egg packaging, disclose a kind of salted duck egg packaging machine, including support seat and salted duck egg oblique cleaning conveying frame, the top of the support seat is fixedly installed with water storage tank and filter box, the top of the salted duck egg oblique cleaning conveying frame is fixedly installed in the guide slope, multiple the fixed baffle fixedly installed in the top of guide slope and fixed baffle, the utility model has following advantages and effects: by the salted duck egg oblique flushing cleaning component of being set, salted duck egg oblique cleaning conveying frame cooperation guide slope, so that salted duck egg rolls along the direction of inclination, the water flow of flushing spray head can be contacted duck egg surface overall, solve the problem that duck egg and water flow contact insufficient when traditional transport round table is cleaned;Fixed baffle separates salted duck egg, and hydraulic telescopic link can adjust the inclination angle of salted duck egg oblique cleaning conveying frame simultaneously, control duck egg rolling speed, avoid multiple duck egg collision damage, further guarantee duck egg intact in cleaning process.

Description

Technical Field

[0001] This utility model relates to the field of salted duck egg packaging technology, and in particular to a salted duck egg packaging machine. Background Technology

[0002] There are several methods for pickling salted duck eggs, including the yellow sand pickling method, the saturated brine pickling method, the flour paste pickling method, and the white wine soaking method. In particular, duck eggs pickled using the yellow sand pickling method have a yellow sand coating on the outside. During the packaging process, the cleaning step is especially important. Improper cleaning can cause the eggshell to crack, allowing dirty water to enter the duck egg, making it inedible and causing economic losses.

[0003] CN207157694U discloses a salted duck egg packaging machine, including a packaging machine body with a hollow structure. A cleaning tank is installed on the inner wall of the bottom end of the packaging machine body, and multiple foam nozzles are installed in the cleaning tank. An air pipe is installed at one end of each foam nozzle. A first motor and a rotating shaft are installed at the bottom end of the packaging machine body. A first gear is fixed to the output shaft of the first motor, and a second gear is fixed to the rotating shaft. A through hole is opened at the axial position of the rotating shaft, and a threaded through hole is opened at the axial position of the second gear. The threaded through hole is connected to the through hole. A screw is installed in the through hole. One end of the screw extends into the cleaning tank, and the other end of the screw is located outside the bottom end of the packaging machine body. A push plate is fixed to one end of the screw, and one side of the push plate is slidably connected to the inner wall of the cleaning tank.

[0004] In the existing technology, before packaging, the duck eggs need to be poured into the washing tank by the staff. During the washing and rotating process, a large number of salted duck eggs are prone to collision and damage. After washing, it is difficult for all the eggs to enter the top of the first conveyor belt. The staff need to manually pick them up and place them. In addition, the solid debris generated during the rinsing process accumulates in the washing tank and is difficult to remove and clean. Utility Model Content

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a salted duck egg packaging machine, including a support base and a salted duck egg inclined washing and conveying frame, wherein a water storage tank and a filter box are fixedly installed on the top of the support base, and salted duck egg inclined rinsing and cleaning components are provided on the water storage tank, the filter box and the salted duck egg inclined washing and conveying frame.

[0006] The salted duck egg tilting rinsing and cleaning assembly includes a guide ramp, fixed partitions, a filter screen, and a solid debris collection drawer. The guide ramp is fixedly installed on the top of the salted duck egg tilting washing conveyor frame. Multiple fixed partitions are fixedly installed on the top of the guide ramp and the salted duck egg tilting washing conveyor frame. The filter screen is slidably installed on the front side of the salted duck egg tilting washing conveyor frame, and the solid debris collection drawer is slidably installed on the inner side of the salted duck egg tilting washing conveyor frame.

[0007] Preferably, fixed hanging ears are fixedly installed at the top four corners of the support base and the bottom four corners of the salted duck egg inclined washing conveyor frame. A rotating shaft is rotatably installed on the inner side of the fixed hanging ears, a rotating frame is fixedly installed on the outer side of the rotating shaft, and hydraulic telescopic rods are fixedly installed on the opposite sides of the upper and lower rotating frames.

[0008] By adopting the above technical solution, workers place salted duck eggs above the left-side conveyor belt, where multiple limiting partitions separate the eggs, allowing them to roll onto the inclined washing conveyor. By controlling the movement of the two hydraulic telescopic rods on the left, the inclined washing conveyor can be tilted at a certain angle, blocking the salted duck eggs on the left. This allows the washing nozzles to clean a batch of salted duck eggs at a time, preventing multiple eggs from colliding and getting damaged. The rolling eggs cover a large cleaning area, thus significantly improving the cleaning effect.

[0009] Preferably, a salted duck egg conveyor frame is fixedly installed on the top left and right sides of the support base, and a vacuum packaging machine body is provided on one side of the salted duck egg conveyor frame on the right; a salted duck egg conveying and drying component is provided on the support base and the salted duck egg conveyor frame.

[0010] Preferably, the salted duck egg tilting rinsing and cleaning assembly further includes a drain pipe, a circulation pump, and a return pipe. One end of the drain pipe is fixedly installed at the bottom of the salted duck egg tilting washing conveyor, and the other end of the drain pipe is fixedly installed at the top of the filter box. The circulation pump is fixedly installed at the top of the water storage tank, and the output end of the circulation pump is connected to the water storage tank. One end of the return pipe is fixedly installed at the input end of the circulation pump, and the other end of the return pipe is fixedly installed inside the filter box.

[0011] Preferably, the salted duck egg tilting rinsing and cleaning assembly further includes a water pump, a connecting rigid pipe, and a rinsing nozzle. The water pump is fixedly installed on the rear side of the water tank, the suction end of the water pump is connected to the water tank, the connecting rigid pipe is fixedly installed on the output end of the water pump, and the rinsing nozzle is fixedly installed on the output end of the connecting rigid pipe.

[0012] Preferably, the salted duck egg conveying and drying assembly includes a salted duck egg conveyor belt, a limiting partition, and a drying support. The salted duck egg conveyor belt is rotatably installed on the inner side of the salted duck egg conveyor frame, the limiting partition is fixedly installed on the outer side of the salted duck egg conveyor belt, and the drying support is fixedly installed on the top of the right side of the salted duck egg conveyor frame.

[0013] Preferably, the salted duck egg conveying and drying assembly further includes a hot air blower, an air outlet nozzle, and a connecting hose. The hot air blower and the air outlet nozzle are both fixedly installed on the top of the drying support. One end of the connecting hose is fixedly installed at the output end of the hot air blower, and the other end of the connecting hose is fixedly installed at the input end of the air outlet nozzle.

[0014] By adopting the above technical solution, after the hot air machine is started, it can transmit hot air through the connecting hose and the air nozzle. The hot air can dry the cleaned salted duck eggs. The right side of the salted duck egg conveyor frame is connected to the main body of the vacuum packaging machine, which can make the device pack more efficiently.

[0015] Preferably, a hard-bristled cleaning brush is fixedly installed inside the front side of the inclined washing and conveying rack for salted duck eggs, and the hard-bristled cleaning brush is in contact with the filter screen.

[0016] By adopting the above technical solution, the cleaning hard bristle brush can wipe and clean the outer surface of the filter screen, effectively preventing it from becoming clogged and allowing water to drain out more effectively.

[0017] Preferably, the front side of the inclined washing and conveying rack for salted duck eggs is provided with a sliding groove, and the filter screen and the solid debris collection drawer are respectively slidably installed inside the corresponding sliding groove.

[0018] By adopting the above technical solution, the filter screen can be pulled out from the inside of the sliding groove, allowing solid debris to fall into the solid debris collection drawer through the connecting groove. The staff can then pull out the solid debris collection drawer to collect and process the solid debris in a unified manner.

[0019] Preferably, the top of the inclined washing and conveying rack for salted duck eggs is provided with a connecting groove, and the solid debris collection drawer is connected to the connecting groove.

[0020] By adopting the above technical solution, the filter screen allows the washed water to enter the drain pipe from the connecting trough and the solid debris collection drawer, and then be discharged into the inside of the filter box for filtration through the drain pipe. The solid debris and salted duck eggs generated during the washing process will not fall off, and the salted duck eggs can roll to the top of the salted duck egg conveyor belt on the right for conveying.

[0021] The beneficial effects of this utility model are:

[0022] This invention features a tilted washing and cleaning component for salted duck eggs. The tilted washing and conveying frame, combined with a guide ramp, allows the salted duck eggs to roll along the tilt direction. The water jets from the washing nozzles can fully contact the surface of the duck eggs, solving the problem of insufficient contact between the duck eggs and the water jets during traditional round conveyor washing. Fixed partitions separate the salted duck eggs, while hydraulic telescopic rods can adjust the tilt angle of the tilted washing and conveying frame to control the rolling speed of the duck eggs, preventing multiple duck eggs from colliding and being damaged, further ensuring the integrity of the duck eggs during the washing process.

[0023] This invention features a salted duck egg conveying and drying assembly. The conveyor belt automatically transports the cleaned salted duck eggs to the drying area, while a limiting partition prevents the eggs from shifting during transport. Hot air generated by a hot air blower dries the eggs through connecting hoses and air nozzles. The dried eggs can then be directly transported to the vacuum packaging machine on the right, forming a continuous process of "cleaning-drying-conveying-packaging," reducing manual handling steps and improving overall packaging efficiency. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of a salted duck egg packaging machine proposed in this utility model.

[0026] Figure 2 This is a partial structural schematic diagram of a salted duck egg packaging machine proposed in this utility model.

[0027] Figure 3 This is a partial structural schematic diagram of the salted duck egg tilting rinsing and cleaning component proposed in this utility model.

[0028] Figure 4 This is a schematic diagram of the explosion section of a salted duck egg packaging machine proposed in this utility model.

[0029] In the diagram: 1. Salted duck egg tilting rinsing and cleaning assembly; 2. Salted duck egg conveying and drying assembly; 3. Support base; 4. Water tank; 5. Filter box; 6. Salted duck egg conveyor frame; 7. Fixed hanging lug; 8. Rotating shaft; 9. Rotating frame; 10. Hydraulic telescopic rod;

[0030] 12. Guide ramp; 13. Fixed partition; 14. Filter screen; 15. Solid debris collection drawer; 16. Drainage pipe; 17. Circulation pump; 18. Return pipe; 19. Water pump; 20. Connecting rigid pipe; 21. Rinsing nozzle;

[0031] 22. Salted duck egg conveyor belt; 23. Limiting partition; 24. Drying support; 25. Hot air blower; 26. Air outlet nozzle; 27. Connecting hose; 28. Cleaning hard brush; 29. ​​Vacuum packaging machine body. Detailed Implementation

[0032] See Figure 1 , Figure 2 , Figure 3 and Figure 4 This utility model provides a salted duck egg packaging machine, including a support base 3 and a salted duck egg inclined washing and conveying frame 11. A water storage tank 4 and a filter box 5 are fixedly installed on the top of the support base 3. A salted duck egg inclined rinsing and cleaning component 1 is provided on the water storage tank 4, the filter box 5 and the salted duck egg inclined washing and conveying frame 11.

[0033] The salted duck egg tilting rinsing and cleaning assembly 1 includes a guide ramp 12, a fixed partition 13, a filter screen 14, and a solid debris collection drawer 15. The guide ramp 12 is fixedly installed on the top of the salted duck egg tilting washing conveyor 11. Multiple fixed partitions 13 are fixedly installed on the top of the guide ramp 12 and the salted duck egg tilting washing conveyor 11. The filter screen 14 is slidably installed on the front side of the salted duck egg tilting washing conveyor 11. The solid debris collection drawer 15 is slidably installed on the inner side of the salted duck egg tilting washing conveyor 11.

[0034] In this embodiment, fixed hanging ears 7 are fixedly installed at the top four corners of the support base 3 and the bottom four corners of the salted duck egg inclined washing conveyor frame 11. A rotating shaft 8 is rotatably installed on the inner side of the fixed hanging ears 7, and a rotating frame 9 is fixedly installed on the outer side of the rotating shaft 8. Hydraulic telescopic rods 10 are fixedly installed on the opposite sides of the upper and lower rotating frames 9.

[0035] In this embodiment, salted duck egg conveyor frame 6 is fixedly installed on the top left and right sides of the support base 3. A vacuum packaging machine body 29 is provided on one side of the right salted duck egg conveyor frame 6. A salted duck egg conveying and drying component 2 is provided on the support base 3 and the salted duck egg conveyor frame 6. The vacuum packaging machine body 29 is existing technology, which can package salted duck eggs after cleaning and drying, so it is not described in detail in this article.

[0036] In this embodiment, the salted duck egg tilting rinsing and cleaning assembly 1 also includes a drain pipe 16, a circulation pump 17, and a return pipe 18. One end of the drain pipe 16 is fixedly installed at the bottom of the salted duck egg tilting washing conveyor 11, and the other end of the drain pipe 16 is fixedly installed at the top of the filter box 5. The circulation pump 17 is fixedly installed at the top of the water storage tank 4, and the output end of the circulation pump 17 is connected to the water storage tank 4. One end of the return pipe 18 is fixedly installed at the input end of the circulation pump 17, and the other end of the return pipe 18 is fixedly installed inside the filter box 5.

[0037] In this embodiment, the salted duck egg tilting washing and cleaning assembly 1 also includes a water pump 19, a connecting rigid pipe 20, and a washing nozzle 21. The water pump 19 is fixedly installed on the rear side of the water storage tank 4, and the suction end of the water pump 19 is connected to the water storage tank 4. The connecting rigid pipe 20 is fixedly installed on the output end of the water pump 19, and the washing nozzle 21 is fixedly installed on the output end of the connecting rigid pipe 20. The salted duck egg tilting washing conveyor 11, in conjunction with the guide ramp 12, allows the salted duck eggs to roll along the tilting direction. The water flow sprayed from the washing nozzle 21 can fully contact the surface of the duck eggs, solving the problem of insufficient contact between the duck eggs and the water flow during traditional conveying round table washing. The fixed partition 13 separates the salted duck eggs, and the hydraulic telescopic rod 10 can adjust the tilt angle of the salted duck egg tilting washing conveyor 11 to control the rolling speed of the duck eggs, avoid multiple duck eggs colliding and being damaged, and further ensure the integrity of the duck eggs during the washing process.

[0038] In this embodiment, the salted duck egg conveying and drying assembly 2 includes a salted duck egg conveyor belt 22, a limiting partition 23, and a drying support 24. The salted duck egg conveyor belt 22 is rotatably installed on the inner side of the salted duck egg conveyor frame 6, the limiting partition 23 is fixedly installed on the outer side of the salted duck egg conveyor belt 22, and the drying support 24 is fixedly installed on the top of the right side of the salted duck egg conveyor frame 6.

[0039] In this embodiment, the salted duck egg conveying and drying assembly 2 also includes a hot air blower 25, an air outlet nozzle 26, and a connecting hose 27. The hot air blower 25 and the air outlet nozzle 26 are both fixedly installed on the top of the drying support 24. One end of the connecting hose 27 is fixedly installed at the output end of the hot air blower 25, and the other end of the connecting hose 27 is fixedly installed at the input end of the air outlet nozzle 26. The salted duck egg conveyor belt 22 can automatically convey the cleaned salted duck eggs to the drying area. The limiting partition 23 prevents the duck eggs from shifting during the conveying process. The hot air generated by the hot air blower 25 dries the duck eggs through the connecting hose 27 and the air outlet nozzle 26. The dried duck eggs can be directly conveyed to the vacuum packaging machine body 29 on the right, forming a continuous process of "cleaning-drying-conveying-packaging", reducing manual transfer steps and improving the overall packaging efficiency.

[0040] In this embodiment, a cleaning hard bristle brush 28 is fixedly installed inside the front side of the inclined washing conveyor frame 11 for salted duck eggs. The cleaning hard bristle brush 28 is in contact with the filter screen 14. The cleaning hard bristle brush 28 can wipe and clean the outer surface of the filter screen 14, which can effectively prevent it from becoming clogged.

[0041] In this embodiment, a sliding groove is provided on the front side of the inclined washing and conveying rack 11 for salted duck eggs. The filter screen 14 and the solid debris collection drawer 15 are slidably installed on the inner side of the corresponding sliding groove. The solid debris generated during washing is intercepted by the filter screen 14. The cleaning hard brush 28 can wipe the surface of the filter screen 14 in real time to prevent the filter screen from clogging and ensure that the water flow is normal. After the filter screen 14 is pulled out, the solid debris falls into the solid debris collection drawer 15 through the connecting groove. The staff only needs to pull out the drawer to handle the debris in a unified manner, which solves the problem of the difficulty in removing and cleaning debris in traditional washing, reduces the burden of manual cleaning, and keeps the washing environment clean.

[0042] In this embodiment, the top of the inclined washing and conveying rack 11 for salted duck eggs is provided with a connecting groove, and the solid debris collection drawer 15 is connected to the connecting groove. The water after washing flows through the drain pipe 16 into the filter box 5 for filtration. The circulating pump 17 pumps the filtered water back to the water storage tank 4 through the return pipe 18, and then transports it to the rinsing nozzle 21 for reuse through the water pump 19 and the connecting hard pipe 20. There is no need to continuously consume new water, which reduces water consumption and meets the requirements of energy conservation and environmental protection.

[0043] Specifically, the salted duck egg tilting washing and cleaning component 1 uses a salted duck egg tilting washing conveyor 11 in conjunction with a guide ramp 12 to make the salted duck eggs roll along the tilting direction. The water jets from the washing nozzles 21 can fully contact the surface of the duck eggs, solving the problem of insufficient contact between the duck eggs and the water jets during traditional conveyor round table cleaning. The fixed partition 13 separates the salted duck eggs, and the hydraulic telescopic rod 10 can adjust the tilt angle of the salted duck egg tilting washing conveyor 11 to control the rolling speed of the duck eggs, avoid multiple duck eggs colliding and being damaged, and further ensure the integrity of the duck eggs during the cleaning process.

[0044] Solid debris generated during cleaning is intercepted by the filter screen 14. The cleaning brush 28 can wipe the surface of the filter screen 14 in real time to prevent the filter screen from clogging and ensure that the water flows out normally. After the filter screen 14 is pulled out, the solid debris falls into the solid debris collection drawer 15 through the connecting groove. The staff only needs to pull out the drawer to dispose of the debris in a unified manner, which solves the problem of difficult debris removal and cleaning in traditional cleaning, reduces the burden of manual cleaning, and keeps the cleaning environment clean.

[0045] After cleaning, the water flows through the drain pipe 16 into the filter box 5 for filtration. The circulation pump 17 pumps the filtered water back to the storage tank 4 through the return pipe 18, and then through the water pump 19 and the connecting hard pipe 20 to the flushing nozzle 21 for reuse. This eliminates the need for continuous consumption of new water, reduces water consumption, and meets the requirements of energy conservation and environmental protection.

[0046] The salted duck egg conveyor belt 22 of the salted duck egg conveying and drying assembly 2 can automatically transport the cleaned salted duck eggs to the drying area. The limiting partition 23 prevents the duck eggs from shifting during the conveying process. The hot air generated by the hot air blower 25 dries the duck eggs through the connecting hose 27 and the air nozzle 26. The dried duck eggs can be directly transported to the vacuum packaging machine body 29 on the right side, forming a continuous process of "cleaning-drying-conveying-packaging", reducing manual transfer steps and improving the overall packaging efficiency.

[0047] The sliding groove design of the inclined washing conveyor frame 11 for salted duck eggs facilitates the pulling and disassembly of the filter screen 14 and the solid debris collection drawer 15, allowing staff to quickly clean the filter screen or debris. When the hydraulic telescopic rod 10 adjusts the tilt angle, it can accommodate salted duck eggs of different sizes, enhancing the equipment's versatility, while simplifying maintenance and reducing the difficulty of use.

Claims

1. A salted duck egg packaging machine, characterized in that, include: Support base (3) and salted duck egg inclined washing conveyor (11), the top of the support base (3) is fixedly installed with a water storage tank (4) and a filter box (5), and the water storage tank (4), the filter box (5) and the salted duck egg inclined washing conveyor (11) are provided with a salted duck egg inclined rinsing and cleaning component (1). The salted duck egg tilting rinsing and cleaning assembly (1) includes a guide ramp (12), a fixed partition (13), a filter screen (14), and a solid debris collection drawer (15). The guide ramp (12) is fixedly installed on the top of the salted duck egg tilting washing conveyor (11). Multiple fixed partitions (13) are fixedly installed on the top of the guide ramp (12) and the salted duck egg tilting washing conveyor (11). The filter screen (14) is slidably installed on the front side of the salted duck egg tilting washing conveyor (11). The solid debris collection drawer (15) is slidably installed on the inner side of the salted duck egg tilting washing conveyor (11).

2. The salted duck egg packaging machine according to claim 1, characterized in that, Fixed hanging ears (7) are fixedly installed at the top four corners of the support base (3) and the bottom four corners of the salted duck egg inclined washing conveyor (11). A rotating shaft (8) is rotatably installed on the inner side of the fixed hanging ears (7), and a rotating frame (9) is fixedly installed on the outer side of the rotating shaft (8). A hydraulic telescopic rod (10) is fixedly installed on the opposite sides of the rotating frame (9) on the upper and lower sides.

3. The salted duck egg packaging machine according to claim 1, characterized in that, Salted duck egg conveyor frame (6) is fixedly installed on the top left and right sides of the support base (3), and a vacuum packaging machine body (29) is provided on one side of the salted duck egg conveyor frame (6) on the right side; salted duck egg conveying and drying components (2) are provided on the support base (3) and the salted duck egg conveyor frame (6).

4. The salted duck egg packaging machine according to claim 1, characterized in that, The salted duck egg tilting rinsing and cleaning assembly (1) also includes a drain pipe (16), a circulation pump (17), and a return pipe (18). One end of the drain pipe (16) is fixedly installed at the bottom of the salted duck egg tilting cleaning conveyor (11), and the other end of the drain pipe (16) is fixedly installed at the top of the filter box (5). The circulation pump (17) is fixedly installed at the top of the water storage tank (4), and the output end of the circulation pump (17) is connected to the water storage tank (4). One end of the return pipe (18) is fixedly installed at the input end of the circulation pump (17), and the other end of the return pipe (18) is fixedly installed inside the filter box (5).

5. A salted duck egg packaging machine according to claim 4, characterized in that, The salted duck egg tilting rinsing and cleaning assembly (1) also includes a water pump (19), a connecting hard pipe (20), and a rinsing nozzle (21). The water pump (19) is fixedly installed on the rear side of the water storage tank (4). The suction end of the water pump (19) is connected to the water storage tank (4). The connecting hard pipe (20) is fixedly installed on the output end of the water pump (19). The rinsing nozzle (21) is fixedly installed on the output end of the connecting hard pipe (20).

6. A salted duck egg packaging machine according to claim 3, characterized in that, The salted duck egg conveying and drying assembly (2) includes a salted duck egg conveyor belt (22), a limiting partition (23), and a drying support (24). The salted duck egg conveyor belt (22) is rotatably installed on the inner side of the salted duck egg conveyor frame (6). The limiting partition (23) is fixedly installed on the outer side of the salted duck egg conveyor belt (22). The drying support (24) is fixedly installed on the top of the right side of the salted duck egg conveyor frame (6).

7. A salted duck egg packaging machine according to claim 6, characterized in that, The salted duck egg conveying and drying assembly (2) also includes a hot air blower (25), an air outlet nozzle (26), and a connecting hose (27). The hot air blower (25) and the air outlet nozzle (26) are both fixedly installed on the top of the drying support (24). One end of the connecting hose (27) is fixedly installed at the output end of the hot air blower (25), and the other end of the connecting hose (27) is fixedly installed at the input end of the air outlet nozzle (26).

8. A salted duck egg packaging machine according to claim 1, characterized in that, A cleaning hard bristle brush (28) is fixedly installed inside the front side of the inclined washing conveyor rack (11) for salted duck eggs, and the cleaning hard bristle brush (28) is in contact with the filter screen (14).

9. A salted duck egg packaging machine according to claim 1, characterized in that, The front side of the inclined washing and conveying rack (11) for salted duck eggs is provided with a sliding groove, and the filter screen (14) and the solid debris collection drawer (15) are respectively slidably installed on the inner side of the corresponding sliding groove.

10. A salted duck egg packaging machine according to claim 1, characterized in that, The top of the inclined washing and conveying rack (11) for salted duck eggs is provided with a connecting groove, and the solid debris collection drawer (15) is connected to the connecting groove.

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