Automatic micro-pressure bean milk cooking machine

Abstract

This utility model relates to the field of soy milk maker technology, specifically an automatic micro-pressure soy milk maker, including a cooking cylinder, a heating seat at the bottom of the cooking cylinder, an inner liner inside the cooking cylinder, and a sealing cover at the top of the cooking cylinder for sealing the inner liner. A pressure relief cover with vertical movement is located in the middle of the upper surface of the sealing cover. This automatic micro-pressure soy milk maker features a heating seat with a heating rod that is fixedly combined with the cooking cylinder. The heating rod continuously cooks the soy milk added to the inner liner. The sealing cover is tightly inserted into the inner liner with the help of a sealing gasket, and the stability of the installation is increased by the engagement of a locking block and a limiting groove. The pressure relief cover is inserted into the exhaust pipe, and the vertical movement of the pressure relief cover is limited by the threaded connection between the limiting screw and the second screw hole on the limiting post. The pressure relief hole communicates with the interior of the exhaust pipe to release pressure, and the sealing of the pressure relief hole achieves internal sealing.

Description

Technical Field

[0001] This utility model relates to the field of soy milk maker technology, specifically an automatic micro-pressure soy milk maker. Background Technology

[0002] Micro-pressure soy milk makers generate micro-pressure in a sealed environment, raising the boiling point, accelerating the softening of ingredients, shortening cooking time, fully releasing nutrients, and reducing the beany taste. The utility model CN222129314U discloses a micro-pressure automated pulp boiling device, including a pulp boiling tank. A boss is fixedly installed on one side of the top of the pulp boiling tank, and a sealing structure is provided at the top of the boss. A motor is provided at the middle of the top of the sealing structure, and the output end of the motor is connected to a rotating shaft. A first mounting sleeve is sleeved on the outer side of the top of the rotating shaft, and a stirring frame is provided on the side wall of the first mounting sleeve. The aforementioned technical solution, with its combination of rotating shaft, stirring frame, stirring rod, and stirring plate, facilitates thorough mixing of materials, thereby improving the overall efficiency of the cooking process. The rotating shaft's rotation causes the mounting sleeves on its outer surface to rotate as well. The combined rotation of these multiple mounting sleeves enables the movement of the stirring frame, stirring rod, and stirring plate, ensuring thorough mixing of the materials for subsequent processing. However, the micro-pressure automated cooking device, when used in a sealed environment, experiences increased internal pressure that cannot be stably released. Opening the lid or discharging the soy milk can cause splashing and injury, while discharging can result in spillage and waste of raw materials. Furthermore, the interior of the cooking tank is difficult to clean. Utility Model Content

[0003] The purpose of this invention is to provide an automatic micro-pressure soy milk maker to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: An automatic micro-pressure soy milk maker includes a steaming cylinder, a heating seat for heating is provided at the bottom of the steaming cylinder, an inner liner is provided inside the steaming cylinder, a sealing cover for sealing the inner liner is provided at the top of the steaming cylinder, and a pressure relief cover that can move up and down is provided at the middle of the upper surface of the sealing cover. A discharge pipe is provided on the outer wall of the cooking cylinder near the bottom. The inner end of the discharge pipe passes through the inner liner, and a butterfly valve is provided on the outer end of the discharge pipe. Several limiting blocks are provided on the outer wall of the cooking cylinder near the top. Each limiting block has an L-shaped limiting groove on one side. A positioning block is provided on the outer wall of the cooking cylinder near the right side. A first screw hole is provided on the positioning block. A handle is provided in the middle of the outer wall of the cooking cylinder. An L-shaped locking block is provided on the lower surface of the sealing cap corresponding to the limiting groove. A sealing gasket is provided on the lower surface of the sealing cap corresponding to the inner wall of the inner liner. A protrusion is provided on the sealing cap corresponding to the positioning block. A through hole is provided on the protrusion. A positioning bolt is provided in the through hole. A handle is provided at the outer end of the protrusion. An exhaust pipe is provided in the middle of the sealing cap. A tray is provided on the lower surface of the sealing cap corresponding to the exhaust pipe. A limiting post is provided in the middle of the tray. A second screw hole is provided at the top of the limiting post. The pressure relief cover has a circular hole in the center of the top, and a limiting screw corresponding to the second screw hole is provided in the circular hole. Several circular holes communicating with the interior are provided on the outer wall of the pressure relief cover. A sealing ring is provided on the top of the inner wall of the pressure relief cover, and a spring is provided in the middle of the sealing ring.

[0005] Furthermore, the top of the heating base is fixedly connected to the bottom of the cooking cylinder by screws, a heating rod is provided in the middle of the heating base, and the top of the heating base is embedded in the lower surface of the cooking cylinder.

[0006] In this invention, the heating rod is electrically connected to an external power source via a wire to steam the soy milk added inside the inner pot. The heating base provides a position for the heating rod to be installed and also supports the steaming pot, increasing the overall stability when placed independently.

[0007] Specifically, the outer diameter of the inner liner is adapted to the inner diameter of the cooking drum, the inner liner is bonded and fixed to the cooking drum, the handle is bonded and fixed to the cooking drum, the discharge pipe is bonded and fixed to the cooking drum, and the butterfly valve is fused and fixed to the discharge pipe.

[0008] In this utility model, the handle provides a point of leverage, making it convenient to lift and use the whole unit. With the help of the discharge pipe equipped with a butterfly valve, the butterfly valve can be opened to facilitate the discharge of soy milk after steaming inside the inner pot, and the butterfly valve can be closed to achieve internal sealing, reducing the impact of liquid discharge and air leakage.

[0009] It should be noted that the limiting blocks are distributed in a ring with equal spacing, and the limiting blocks and the cooking cylinder are integrally formed. The width of the inner wall of the limiting groove is adapted to the width of the outer wall of the locking block, and the locking block and the limiting groove are correspondingly engaged.

[0010] In this invention, the locking block and the limiting groove are engaged in a corresponding manner, which increases the stability of the combined installation of the sealing cover and the cooking cylinder. Furthermore, the locking block and the limiting groove are engaged by rotating in the same direction, which facilitates disassembly or installation.

[0011] Furthermore, the positioning block and the cooking cylinder are integrally formed, the protrusion and the sealing cover are integrally formed, the positioning bolt passes through the through hole and is threadedly connected to the first screw hole, and the handle and the protrusion are integrally formed.

[0012] In this invention, the handle provides a point of force to facilitate the rotation and engagement of the sealing cover. The protrusion corresponds to the positioning block, and the positioning bolt is threadedly connected to the first screw hole, thereby achieving a stable combination and installation of the positioning block and the protrusion, and thus fixing the combined position of the sealing cover and the cooking cylinder.

[0013] Secondly, the top of the sealing gasket is bonded and fixed to the bottom of the sealing cover, the outer diameter of the sealing gasket is adapted to the inner diameter of the inner liner, and the tray passes through the sealing gasket through the connecting post and is fixedly connected to the sealing cover by screws.

[0014] In this invention, the sealing gasket is inserted into the inner liner to increase the sealing of the inner liner, and the tray provides the force point for the limiting post without affecting the discharge of internal steam from the exhaust pipe.

[0015] It is worth noting that the bottom of the limiting post is welded and fixed to the top of the tray, the exhaust pipe and the sealing cover are integrally formed, the inner diameter of the pressure relief cover is adapted to the outer diameter of the exhaust pipe, the top of the sealing ring is bonded and fixed to the top of the inner wall of the pressure relief cover, the outer diameter of the sealing ring is adapted to the inner diameter of the exhaust pipe, one end of the spring is fixedly connected to the top of the inner wall of the pressure relief cover, and the other end is fixedly connected to the upper surface of the tray, and the limiting screw passes through the round hole and is threadedly connected to the second screw hole.

[0016] In this invention, the pressure relief cover is inserted into the top of the exhaust pipe. A spring provides elastic force, increasing the internal pressure and causing the pressure relief cover to move upward. As the pressure decreases, the pressure relief cover returns to its initial position with the help of the spring. Simultaneously, the spring deformation achieves pressure relief buffering. The sealing ring is inserted into the exhaust pipe to increase the sealing performance between the pressure relief cover and the exhaust pipe. The limiting screw is threaded into the second screw hole, limiting the range of vertical movement of the pressure relief cover. The limiting screw extends to the bottom of the second screw hole, and the pressure relief hole on the pressure relief cover is blocked by the exhaust pipe, achieving internal sealing. The end of the limiting screw is inserted halfway into the second screw hole, increasing the internal pressure and causing the pressure relief cover to move upward, facilitating communication between the pressure relief hole and the inside of the exhaust pipe, thus achieving corresponding pressure relief engagement.

[0017] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model combines a heating base with a heating rod and a steaming cylinder. The heating rod continuously steams the soy milk added inside the inner pot. The sealing cover is tightly inserted into the inner pot with the help of the sealing gasket. The stability of the installation is increased by the engagement of the locking block and the limiting groove. The pressure relief cover is inserted into the exhaust pipe and the upper and lower movement of the pressure relief cover is limited by the threaded connection of the limiting screw and the second screw hole on the limiting post. The pressure relief hole is connected to the inside of the exhaust pipe to release pressure. The pressure relief hole is then sealed to achieve internal sealing.

[0018] 2. This utility model provides a grip point for easy carrying of the steaming cylinder by setting a handle. With the cooperation of the positioning block and the protrusion, the positioning bolt passes through the through hole and is threadedly connected to the first screw hole to achieve a stable combination and fixation of the sealing cover and the steaming cylinder. The pressure relief cover is equipped with a sealing ring inside, which is inserted and cooperates with the exhaust pipe to increase the sealing performance of steaming. The spring connects the pressure relief cover and the support plate to increase the temperature during pressure relief. After the pressure relief cover is depressurized, it returns to its initial position. The discharge pipe with a butterfly valve realizes the discharge and collection of soy milk after steaming, reducing the impact of tipping and spillage. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the combination of the cooking cylinder and the heating base of this utility model; Figure 3 This is a schematic diagram of the sealing cap structure of this utility model; Figure 4 This is a schematic diagram showing the separation of the sealing cap and the pressure relief cap of this utility model; Figure 5 This is a schematic cross-sectional view of the sealing cap and pressure relief cap of this utility model; Figure 6 This is a schematic diagram of the overall cross-sectional structure of this utility model.

[0020] The meanings of the labels in the diagram are as follows: 1. Cooking drum; 10. Inner liner; 11. Discharge pipe; 110. Butterfly valve; 12. Handle; 13. Limiting block; 130. Limiting groove; 14. Positioning block; 140. First screw hole; 2. Sealing cap; 20. Sealing gasket; 21. Locking block; 22. Exhaust pipe; 23. Tray; 24. Protrusion; 240. Perforation; 241. Positioning bolt; 242. Handle; 25. Limiting post; 250. Second screw hole; 3. Pressure relief cover; 30. Round hole; 300. Limiting screw; 31. Pressure relief hole; 32. Spring; 33. Sealing ring; 4. Heated seat. Detailed Implementation

[0021] 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.

[0022] Please see Figures 1-6 This embodiment provides a technical solution: An automatic micro-pressure soy milk maker includes a steaming cylinder 1, a heating seat 4 for heating is provided at the bottom of the steaming cylinder 1, the top of the heating seat 4 is fixedly connected to the bottom of the steaming cylinder 1 by screws, a heating rod is provided in the middle of the heating seat 4, and the top of the heating seat 4 is embedded in the lower surface of the steaming cylinder 1.

[0023] In this invention, the heating rod is electrically connected to an external power source via a wire to steam the soy milk added inside the inner pot 10. The heating base 4 provides a position for the heating rod to be installed and also supports the steaming cylinder 1, increasing the overall stability when placed independently.

[0024] Furthermore, the cooking cylinder 1 is provided with an inner liner 10 inside, and a sealing cover 2 for sealing the inner liner 10 is provided on the top of the cooking cylinder 1. A pressure relief cover 3 that can move up and down is provided in the middle of the upper surface of the sealing cover 2. Specifically, a discharge pipe 11 is provided on the outer wall of the cooking drum 1 near the bottom. The inner end of the discharge pipe 11 is inserted into the inner liner 10, and a butterfly valve 110 is provided on the outer end of the discharge pipe 11. The outer diameter of the inner liner 10 is adapted to the inner diameter of the cooking drum 1. The inner liner 10 is bonded and fixed to the cooking drum 1. The handle 12 is bonded and fixed to the cooking drum 1. The discharge pipe 11 is bonded and fixed to the cooking drum 1. The butterfly valve 110 is fused and fixed to the discharge pipe 11.

[0025] In this utility model, the handle 12 provides a point of leverage for easy lifting and handling. With the help of the discharge pipe 11 equipped with the butterfly valve 110, the butterfly valve 110 opens to facilitate the discharge of soy milk after steaming inside the inner pot 10, and closes to achieve internal sealing, reducing the impact of liquid discharge and air leakage.

[0026] It should be noted that a number of limiting blocks 13 are provided on the outer wall of the cooking cylinder 1 near the top. Each limiting block 13 has an L-shaped limiting groove 130 on one side. A positioning block 14 is provided on the outer wall of the cooking cylinder 1 near the right side. A first screw hole 140 is provided on the positioning block 14. A handle 12 is provided in the middle of the outer wall of the cooking cylinder 1. Furthermore, an L-shaped locking block 21 is provided on the lower surface of the sealing cover 2 corresponding to the limiting groove 130. The limiting blocks 13 are distributed in a ring at equal intervals, and the limiting blocks 13 and the cooking cylinder 1 are integrally formed. The width of the inner wall of the limiting groove 130 is adapted to the width of the outer wall of the locking block 21, and the locking block 21 and the limiting groove 130 are correspondingly engaged.

[0027] In this utility model, the locking block 21 and the limiting groove 130 are correspondingly engaged, which increases the stability of the combined installation of the sealing cover 2 and the cooking cylinder 1. Furthermore, the locking block 21 and the limiting groove 130 are engaged by rotating in the same direction, which facilitates disassembly or installation.

[0028] Specifically, a sealing gasket 20 is provided on the lower surface of the sealing cover 2 corresponding to the inner wall of the inner liner 10. A protrusion 24 is provided on the sealing cover 2 corresponding to the positioning block 14. A through hole 240 is provided on the protrusion 24, and a positioning bolt 241 is provided in the through hole 240. A handle 242 is provided at the outer end of the protrusion 24. The positioning block 14 and the cooking cylinder 1 are integrally formed. The protrusion 24 and the sealing cover 2 are integrally formed. The positioning bolt 241 passes through the through hole 240 and is threadedly connected to the first screw hole 140. The handle 242 and the protrusion 24 are integrally formed.

[0029] In this utility model, the handle 242 provides a point of force to facilitate the rotation and engagement of the sealing cover 2. The protrusion 24 corresponds to the positioning block 14, and the positioning bolt 241 is threadedly connected to the first screw hole 140, so as to realize the stable combination and installation of the positioning block 14 and the protrusion 24, thereby fixing the combined position of the sealing cover 2 and the cooking cylinder 1.

[0030] Secondly, the sealing cover 2 has an exhaust pipe 22 in the middle, and a tray 23 is provided on the lower surface of the sealing cover 2 corresponding to the exhaust pipe 22. A limiting post 25 is provided in the middle of the tray 23, and a second screw hole 250 is provided on the top of the limiting post 25. It is worth noting that the top of the sealing gasket 20 is bonded and fixed to the bottom of the sealing cover 2, the outer diameter of the sealing gasket 20 is adapted to the inner diameter of the inner liner 10, and the tray 23 passes through the sealing gasket 20 through the connecting post and is fixedly connected to the sealing cover 2 by screws.

[0031] In this invention, the sealing gasket 20 is inserted into the inner liner 10 to increase the sealing of the inner liner 10. The tray 23 provides the force point for the limiting post 25 and does not affect the discharge of internal steam from the exhaust pipe 22.

[0032] Furthermore, a circular hole 30 is provided in the middle of the top of the pressure relief cover 3, and a limiting screw 300 corresponding to the second screw hole 250 is provided in the circular hole 30. Several circular holes 30 communicating with the interior are provided on the outer wall of the pressure relief cover 3. A sealing ring 33 is provided at the top of the inner wall of the pressure relief cover 3, and a spring 32 is provided in the middle of the sealing ring 33.

[0033] Specifically, the bottom of the limiting post 25 is welded and fixed to the top of the tray 23, the exhaust pipe 22 and the sealing cover 2 are integrally formed, the inner diameter of the pressure relief cover 3 is adapted to the outer diameter of the exhaust pipe 22, the top of the sealing ring 33 is bonded and fixed to the top of the inner wall of the pressure relief cover 3, the outer diameter of the sealing ring 33 is adapted to the inner diameter of the exhaust pipe 22, one end of the spring 32 is fixedly connected to the top of the inner wall of the pressure relief cover 3, and the other end is fixedly connected to the upper surface of the tray 23, and the limiting screw 300 passes through the round hole 30 and is threadedly connected to the second screw hole 250.

[0034] In this invention, the pressure relief cover 3 is inserted into the top of the exhaust pipe 22. The spring 32 provides elastic force, increasing the internal pressure and squeezing the pressure relief cover 3 upward. As the pressure decreases, the pressure relief cover 3 returns to its initial position with the help of the spring 32. At the same time, the deformation of the spring 32 achieves pressure relief buffering. The sealing ring 33 is inserted into the exhaust pipe 22 to increase the sealing between the pressure relief cover 3 and the exhaust pipe 22. The limiting screw 300 is threaded into the second screw hole 250, limiting the range of vertical movement of the pressure relief cover 3. The limiting screw 300 extends to the bottom of the second screw hole 250, and the pressure relief hole 31 on the pressure relief cover 3 is blocked by the exhaust pipe 22 to achieve internal sealing. The end of the limiting screw 300 is inserted halfway into the second screw hole 250, increasing the internal pressure and squeezing the pressure relief cover 3 upward, facilitating the communication between the pressure relief hole 31 and the interior of the exhaust pipe 22, and achieving corresponding pressure relief.

[0035] In this embodiment of the automatic micro-pressure soy milk maker, when in use, the heating base 4 with heating rod is first combined and fixed with the steaming cylinder 1 with inner pot 10. Then, the discharge pipe 11 with butterfly valve 110 is combined and fixed with the steaming cylinder 1. The sealing cover 2 with multiple locking blocks 21 is inserted and engaged with the inner pot 10 through sealing gasket 20. The pressure relief cover 3 is inserted and engaged with the exhaust pipe 22 through spring 32 and sealing ring 33. The limiting screw 300 passes through the round hole 30 and is threadedly connected to the second screw hole 250 at the top of the limiting post 25 on the tray 23. The sealing cover 2 is installed on the steaming cylinder 1 and rotated clockwise. The locking blocks 21 are inserted and engaged with the limiting groove 130 to increase the stability of the combination of the sealing cover 2 and the steaming cylinder 1. When soy milk needs to be added, hold the handle 242 and rotate the sealing cover 2 counterclockwise. The sealing cover 2 is removed from the top of the steaming cylinder 1, and the soy milk is added from the top of the inner pot 10. Then, the sealing cover 2 is inserted and engaged with the steaming cylinder 1. Turn it clockwise, and the locking block 21 is inserted and engaged with the limiting groove 130. The positioning block 14 corresponds to the protrusion 24. The positioning bolt 241 passes through the through hole 240 and is threadedly connected to the first screw hole 140, so that the sealing cover 2 and the steaming cylinder 1 are combined and fixed. The limiting screw 300 is threadedly connected to the second screw hole 250, and the end of the limiting screw 300 extends to the bottom of the second screw hole 250, which limits the position of the pressure relief cover 3. The pressure relief hole 31 is blocked by the exhaust pipe 22. Then, the heating rod on the heating base 4 is connected to the external power supply to steam the soy milk inside. The hot steam is not discharged, which increases the internal pressure of the inner pot 10. After steaming and cooking are completed, internal pressure needs to be released. The limiting screw 300 is rotated to the middle of the second screw hole 250, so that the pressure relief hole 31 on the pressure relief cover 3 can continuously release pressure and exhaust air. When the pressure is released to the final stage, the internal pressure is small, and the limiting screw 300 is removed from the second screw hole 250, so that the inside of the pressure relief cover 3 and the inside of the exhaust pipe 22 can be directly connected to the outside, and the pressure is fully released. Finally, the butterfly valve 110 is opened, and the steamed soy milk is discharged in a concentrated manner through the discharge pipe 11. After removing the sealing cap 2, it is convenient to thoroughly clean the inside of the inner pot 10 without affecting the next steaming process, and to reduce the contamination of the next steaming liquid by soy milk residue.

Claims

1. An automatic micro-pressure boiled soybean milk machine comprising a boiling cylinder, characterized in that: The bottom of the cooking drum is provided with a heating seat for heating, the inside of the cooking drum is provided with an inner liner, the top of the cooking drum is provided with a sealing cover for sealing the inner liner, and the upper surface of the sealing cover is provided with a pressure relief cover that can move up and down in the middle. A discharge pipe is provided on the outer wall of the cooking cylinder near the bottom. The inner end of the discharge pipe passes through the inner liner, and a butterfly valve is provided on the outer end of the discharge pipe. Several limiting blocks are provided on the outer wall of the cooking cylinder near the top. Each limiting block has an L-shaped limiting groove on one side. A positioning block is provided on the outer wall of the cooking cylinder near the right side. A first screw hole is provided on the positioning block. A handle is provided in the middle of the outer wall of the cooking cylinder. An L-shaped locking block is provided on the lower surface of the sealing cap corresponding to the limiting groove. A sealing gasket is provided on the lower surface of the sealing cap corresponding to the inner wall of the inner liner. A protrusion is provided on the sealing cap corresponding to the positioning block. A through hole is provided on the protrusion. A positioning bolt is provided in the through hole. A handle is provided at the outer end of the protrusion. An exhaust pipe is provided in the middle of the sealing cap. A tray is provided on the lower surface of the sealing cap corresponding to the exhaust pipe. A limiting post is provided in the middle of the tray. A second screw hole is provided at the top of the limiting post. The pressure relief cover has a circular hole in the center of the top, and a limiting screw corresponding to the second screw hole is provided in the circular hole. Several circular holes communicating with the interior are provided on the outer wall of the pressure relief cover. A sealing ring is provided on the top of the inner wall of the pressure relief cover, and a spring is provided in the middle of the sealing ring.

2. The automatic micro-pressure soy milk maker according to claim 1, characterized in that: The top of the heating base is fixedly connected to the bottom of the cooking cylinder by screws. A heating rod is provided in the middle of the heating base, and the top of the heating base is embedded in the lower surface of the cooking cylinder.

3. The automatic micro-pressure boiled soybean milk machine according to claim 1, characterized in that: The outer diameter of the inner liner is adapted to the inner diameter of the cooking drum. The inner liner is bonded and fixed to the cooking drum. The handle is bonded and fixed to the cooking drum. The discharge pipe is bonded and fixed to the cooking drum. The butterfly valve is fused and fixed to the discharge pipe.

4. The automatic micro-pressure boiled soybean milk machine according to claim 1, characterized in that: The limiting blocks are distributed in a ring with equal spacing, and the limiting blocks and the cooking cylinder are integrally formed. The width of the inner wall of the limiting groove is adapted to the width of the outer wall of the locking block, and the locking block and the limiting groove are correspondingly engaged.

5. The automatic micro-pressure boiled soybean milk machine according to claim 1, characterized in that: The positioning block and the cooking cylinder are integrally formed, the protrusion and the sealing cover are integrally formed, the positioning bolt passes through the through hole and is threadedly connected to the first screw hole, and the handle and the protrusion are integrally formed.

6. The automatic micro-pressure boiled soybean milk machine according to claim 1, characterized in that: The top of the sealing gasket is bonded and fixed to the bottom of the sealing cap. The outer diameter of the sealing gasket is adapted to the inner diameter of the inner liner. The tray passes through the sealing gasket via a connecting post and is fixedly connected to the sealing cap by screws.

7. The automatic micro-pressure boiled soybean milk machine according to claim 1, characterized in that: The bottom of the limiting post is welded and fixed to the top of the tray. The exhaust pipe and the sealing cover are integrally formed. The inner diameter of the pressure relief cover is adapted to the outer diameter of the exhaust pipe. The top of the sealing ring is bonded and fixed to the top of the inner wall of the pressure relief cover. The outer diameter of the sealing ring is adapted to the inner diameter of the exhaust pipe. One end of the spring is fixedly connected to the top of the inner wall of the pressure relief cover, and the other end is fixedly connected to the upper surface of the tray. The limiting screw passes through the round hole and is threadedly connected to the second screw hole.

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