Pure steam sterilization cabinet

Abstract

The utility model relates to the technical field of sterilization cabinets, in particular to a pure steam sterilization cabinet, which comprises a cabinet body, a heating bottom box, a condensing cone plate, a heat conducting plate, a tube seat, an impeller B and a transmission component. The cabinet body is rotatably connected with the cabinet door, and multiple sets of supports are arranged on the inner wall of the cabinet body at intervals and slidably connected with the containing basket. And the heating bottom box is arranged in the cabinet body and is positioned below the placing basket. The condensation cone plate is arranged in the cabinet body, a through hole A is formed in the condensation cone plate, and a water receiving hopper is arranged at the bottom of the condensation cone plate and communicated with the control valve. The heat conduction plate is connected with the condensation cone plate and the cooling fins, a wind scooper is arranged outside the cooling fins on the cabinet body, and an auxiliary cooling assembly is arranged on the wind scooper. The pipe base is communicated with the through hole A and the exhaust pipe, and an air filtering assembly is arranged in the pipe base. The impeller B is located in the exhaust pipe. The transmission assembly is in transmission connection with the impeller B and the auxiliary heat dissipation assembly. According to the utility model, articles such as sterile clothes, filling containers and the like can be quickly sterilized, and the activated carbon does not need to be replaced at high frequency.

Description

Technical Field

[0001] This utility model relates to the field of sterilization cabinet technology, and in particular to a pure steam sterilization cabinet. Background Technology

[0002] Steam sterilizers primarily sterilize items by heating water to generate high-pressure steam. The water can be heated to hot steam using a built-in electric heating element, or it can be heated to boiling point using an external steam generator. When the water is heated to 100°C, the resulting steam pressure is approximately 1.013 × 10^5 Pa. This environment allows for the rapid sterilization of sterile clothing, filling containers, and other items used in Class B clean areas.

[0003] The technical solution disclosed in Chinese Patent No. CN219538958U involves fixing and welding first threaded plates to both sides of the top and bottom of the door panel. After placing items and utensils on the top of the partition, the hinged door panel is closed, the first and second threaded plates are aligned, and the screw is turned to reinforce them. This causes the movable block connected by the spring in the slot to squeeze the sealing gasket and then enter the pressure groove. Together with the outer gasket, the gap of the cabinet door is sealed, preventing steam leakage when the inside is pressurized, thus solving the problem of poor sealing effect of the cabinet door.

[0004] However, the device still has shortcomings: because it lacks a structure to cool and dehumidify the air discharged from the outlet pipe, the activated carbon particles easily become wet after absorbing moisture from the gas, thus losing their function of absorbing toxic and harmful gases. Therefore, the activated carbon particles in the device need to be replaced very frequently. Utility Model Content

[0005] The purpose of this invention is to address the problems existing in the background technology by proposing a pure steam sterilization cabinet.

[0006] The technical solution of this utility model is: a pure steam sterilizer, including a cabinet body, a cabinet door that is rotatably and sealingly fitted to the cabinet body, and multiple sets of opposing supports arranged at intervals on the inner wall of the cabinet body, with the supports slidably connected to place baskets.

[0007] The heating base box is installed inside the cabinet and located below the bottom basket.

[0008] A condenser cone plate is installed on the upper wall of the inner compartment of the cabinet with its tip pointing downwards. The tip of the condenser cone plate has a through hole A that connects to the outside. The bottom of the condenser cone plate has a water collection trough for collecting condensate. The water collection trough is connected to a control valve. The control valve automatically opens when the cabinet door is open, allowing the condensate to automatically flow back into the heating base box.

[0009] A heat-conducting plate is inserted into the cabinet, with one end connected to a condenser cone plate and the other end connected to a heat sink. An air guide shroud is installed on the outside of the heat sink on the cabinet, and auxiliary heat dissipation components are installed on the air guide shroud.

[0010] The pipe socket is connected to the cabinet and connects to the through hole A and the exhaust pipe. An air filter assembly is installed inside the pipe socket.

[0011] Impeller B is located inside the exhaust pipe and is rotatably connected to its inner wall.

[0012] And a transmission assembly, which drives and connects impeller B and auxiliary heat dissipation assembly.

[0013] Preferably, a sealing groove is provided on the cabinet body around its opening, a sealing ring that matches the sealing groove is provided on the cabinet door, and a control panel, handle and lock hook are provided on the cabinet door, while a buckle that cooperates with the lock hook is provided on the cabinet body.

[0014] Preferably, the heating box includes a box body and a heater. The box body is connected to the upper surface of the bottom plate of the cabinet. The opening of the box body faces upward, and the heater is located inside the box body and below the liquid surface.

[0015] Preferably, a water guide plate is provided inside the cabinet, the water guide plate is provided with a guide hole communicating with the opening of the box, and the water guide plate is provided with a conical groove communicating with the guide hole.

[0016] Preferably, the control valve includes a fixed seat, a sealing block, and a push plate. The fixed seat is located between the water receiving basin and the water guide plate and is connected to the side wall of the cabinet. The fixed seat has an inner cavity, and an inlet and an outlet hole communicating with the inner cavity are provided on the fixed seat. The outlet hole is located directly below the inlet hole. A water guide pipe communicating with the interior of the water receiving basin is provided at the bottom of the water receiving basin, and the output end of the water guide pipe is connected to the inlet hole. The sealing block is set in the inner cavity and is slidably connected to its inner wall. The sealing block has a through hole B. The sealing block is connected to a connecting rod, which is slidably connected to the fixed seat, and one end of the connecting rod extending out of the fixed seat is connected to the push plate. The fixed seat has a slide groove with an opening consistent with the opening of the cabinet. A spring A is set in the slide groove. The spring A is sleeved on the connecting rod and abuts against the inner wall of the slide groove and the push plate. When the spring A is extended, the through hole B opens to the inlet and outlet holes. When the spring A is contracted, it closes the inlet and outlet holes.

[0017] Preferably, the auxiliary heat dissipation component includes a rotating shaft A and an impeller A. The heat sink and the air guide shroud include two sets, with the air inlets of the two air guide shrouds facing away from each other. Each of the two air guide shrouds is provided with a through hole C, and a fixing frame A is installed in the through hole C. The rotating shaft A is rotatably connected to the fixing frame, and the impeller A is coaxially connected to the rotating shaft A.

[0018] Preferably, a fixed frame B is installed inside the exhaust pipe, the fixed frame B is rotatably connected to the rotating shaft B, and the impeller B is coaxially connected to the rotating shaft B.

[0019] Preferably, the transmission assembly includes a single-groove pulley, a double-groove pulley, and a toothed belt. The single-groove pulley is coaxially connected to shaft A, the double-groove pulley is coaxially connected to shaft B, and the double-groove pulley is connected to the single-groove pulleys on both sides via a toothed belt drive.

[0020] Preferably, the air filter assembly includes a storage box filled with an adsorbent for adsorbing toxic and harmful gases. The storage box is inserted into the tube seat and slidably connected to its inner wall, and the bottom plate of the storage box is a breathable plate.

[0021] Preferably, a pressure relief assembly is installed inside the exhaust pipe. The pressure relief assembly includes a retaining ring, a limiting rod, a sealing plate, and a spring B. The retaining ring is located inside the exhaust pipe and connected to its inner wall. The retaining ring has an upward-facing annular groove. The limiting rod is inserted into the annular groove from below the retaining ring and is slidably connected to the retaining ring. The limiting rods are arranged in a circular array about the center of the retaining ring, and the bottom end of the limiting rod is connected to a limiting block. The sealing plate is located inside the annular groove and is slidably connected to its inner wall. The bottom surface of the sealing plate is connected to the upper surface of the limiting rod. The spring B is sleeved on the outside of the limiting rod, and its two ends abut against the lower surface of the retaining ring and the upper surface of the limiting block, respectively.

[0022] Compared with the prior art, the present invention has the following beneficial technical effects:

[0023] By designing a combined structure of a condenser cone and a water collection basin, and incorporating heat dissipation fins connected to the condenser cone, the system utilizes the condenser cone and the rising hot air from inside the cabinet for cooling and dehumidification. This results in lower humidity of the air entering the pipe socket, preventing rapid deterioration of the activated carbon and reducing the frequency of activated carbon replacement. A control valve consisting of a fixed base, sealing block, push plate, and spring A prevents condensate from automatically entering the heating box when the cabinet is closed. When the cabinet door is open, the control valve opens, allowing condensate to enter the heating box, effectively preventing low-temperature water from entering and lowering the water temperature inside the heating box, thus affecting steam generation. A pressure relief valve structure maintains a high air pressure inside the cabinet, enhancing the efficiency of steam sterilization through high temperature and pressure. A linked structure of impellers A and B and the transmission assembly allows the flowing gas to drive impeller A during exhaust, which in turn drives impeller B through the transmission assembly. This causes air to circulate inside and outside the air guide shroud, accelerating the cooling of the heat dissipation fins and maintaining a low temperature for the condenser cone, ensuring rapid condensation of water vapor in the gas. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of one embodiment of the present utility model;

[0025] Figure 2 This is a schematic diagram of the connection structure between the condenser cone plate, the water receiving basin, and the fixed base.

[0026] Figure 3 This is a schematic diagram of the internal structure of the mounting base;

[0027] Figure 4 This is a schematic diagram of the connection structure between the air guide shroud and the heat sink.

[0028] Figure 5 This is a schematic diagram of the structure of each component inside the tube seat;

[0029] Figure 6 This is a schematic diagram of the pressure relief assembly.

[0030] Attached reference numerals: 1. Cabinet body; 2. Cabinet door; 3. Sealing ring; 4. Fastener; 5. Bracket; 6. Placement basket; 7. Water guide plate; 8. Heating base box; 9. Condensation cone plate; 91. Through hole A; 10. Water receiving basin; 11. Water guide pipe; 12. Fixing base; 121. Inner cavity; 122. Water inlet hole; 123. Water outlet hole; 124. Slide groove; 13. Sealing block; 131. Through hole B; 14. Connecting rod; 15. Push plate; 16. Spring 17. Spring A; 18. Heat-conducting plate; 19. Heat sink; 10. Air guide shroud; 191. Through hole C; 20. Shaft A; 21. Impeller A; 22. Single groove pulley; 23. Pipe seat; 24. Storage box; 25. Exhaust pipe; 26. Shaft B; 27. Impeller B; 28. Double groove pulley; 29. ​​Toothed belt; 30. Fixing ring; 3001. Annular groove; 31. Limiting rod; 311. Limiting block; 32. Sealing plate; 33. Spring B. Detailed Implementation

[0031] Example 1

[0032] like Figures 1-5As shown, the pure steam sterilizer proposed in this utility model includes a cabinet body 1, a heating base box 8, a condensing cone plate 9, a heat-conducting plate 17, a pipe seat 23, an impeller B27, and a transmission assembly. The cabinet body 1 is rotatably fitted with a cabinet door 2 that seals against it. A sealing groove is provided on the cabinet body 1 around its opening. A sealing ring 3 adapted to the sealing groove is provided on the cabinet door 2. The cabinet door 2 is equipped with a control panel, a handle, and a locking hook. A latch 4 that engages with the locking hook is provided on the cabinet body 1. Multiple sets of opposing supports 5 are spaced apart on the inner wall of the cabinet body 1, and the supports 5 are slidably connected to a placement basket 6. The heating base box 8 is located inside the cabinet body 1. The heating base box 8 includes a box body and a heater. The box body is connected to the upper surface of the bottom plate of the cabinet body 1, with the opening of the box body facing upwards. The heater is located inside the box body and below the liquid surface. A water guide plate 7 is provided inside the cabinet body 1. The water guide plate 7 has a guide hole communicating with the opening of the box body, and a conical groove communicating with the guide hole is provided on the water guide plate 7. A condenser cone plate 9, with its tip pointing downwards, is mounted on the upper wall of the inner compartment of cabinet 1. The tip of the condenser cone plate 9 has a through hole A91 connecting to the outside. A water collection basin 10 is located at the bottom of the condenser cone plate 9 to collect condensate. The water collection basin 10 is connected to a control valve, which automatically opens when cabinet door 2 is open, allowing condensate to automatically flow back into the heating base box 8. The control valve includes a fixed seat 12, a sealing block 13, and a push plate 15. The fixed seat 12 is located between the water collection basin 10 and the water guide plate 7 and is connected to the side wall of cabinet 1. An inner cavity 121 is provided inside the fixed seat 12. An inlet hole 122 and an outlet hole 123, both communicating with the inner cavity 121, are located on the fixed seat 12. The outlet hole 123 is located directly below the inlet hole 122. A water guide pipe 11, communicating with the interior of the water collection basin 10, is located at the bottom of the basin. The output end of the water guide pipe 11 is connected to the inlet hole 122. A sealing block 13 is disposed within the inner cavity 121 and slidably connected to its inner wall. A through hole B131 is provided on the sealing block 13. The sealing block 13 is connected to a connecting rod 14, which is slidably connected to a fixed seat 12. One end of the connecting rod 14 extending out of the fixed seat 12 is connected to a push plate 15. A slide groove 124 with an opening consistent with the opening of the cabinet 1 is provided on the fixed seat 12. A spring A16 is disposed within the slide groove 124. The spring A16 is sleeved on the connecting rod 14 and abuts against the inner wall of the slide groove 124 and the push plate 15. When the spring A16 is extended, the through hole B131 leads to the water inlet hole 122 and the water outlet hole 123. When the spring A16 is contracted, it closes the water inlet hole 122 and the water outlet hole 123. One end of the heat-conducting plate 17, inserted into the cabinet 1, is connected to the condenser cone plate 9, and the other end is connected to the heat sink 18. An air guide shroud 19 is installed on the outside of the heat sink 18 on the cabinet 1, and an auxiliary heat dissipation assembly is installed on the air guide shroud 19. The auxiliary heat dissipation assembly includes a rotating shaft A20 and an impeller A21. The heat sink 18 and the air guide shroud 19 consist of two sets, with the air inlets of the two air guide shrouds 19 facing away from each other. A through hole C191 is provided on each of the two air guide shrouds 19, and a fixing bracket A is installed inside the through hole C191. The rotating shaft A20 is rotatably connected to the fixing bracket, and the impeller A21 is coaxially connected to the rotating shaft A20.The tube seat 23 is connected to the cabinet 1 and communicates with the through hole A91 and the exhaust pipe 25. An air filter assembly is installed inside the tube seat 23. The air filter assembly includes a storage box 24 filled with an adsorbent for adsorbing toxic and harmful gases, including but not limited to activated carbon. The storage box 24 is inserted into the tube seat 23 and slidably connected to its inner wall. The bottom plate of the storage box 24 is a breathable plate. A fixing frame B is installed inside the exhaust pipe 25, and the fixing frame B is rotatably connected to the rotating shaft B26. The impeller B27 is located inside the exhaust pipe 25 and is coaxially connected to the rotating shaft B26. The transmission assembly includes a single-groove pulley 22, a double-groove pulley 28, and a toothed belt 29. The single-groove pulley 22 is coaxially connected to the rotating shaft A20, and the double-groove pulley 28 is coaxially connected to the rotating shaft B26. The double-groove pulley 28 and the single-groove pulleys 22 on both sides are respectively driven by a toothed belt 29. The transmission assembly drives the impeller B27 and the auxiliary heat dissipation assembly.

[0033] In this embodiment, the items to be sterilized are placed in the placement basket 6, an appropriate amount of water is added to the heating base box 8, and then the cabinet door 2 is closed and locked with the buckle 4. At this time, the cabinet door 2 presses the push plate 15, so that the sealing block 13 seals the water inlet 122 and the water outlet 123. Next, the heater is turned on, heating the water and gradually generating steam. The steam acts on the items through the holes in the basket 6, thus placing the items in a high-temperature steam environment. The steam generated inside the cabinet 1 rises and contacts the condenser cone 9. The high-temperature steam condenses quickly into water upon contact with the cold surface. The water falls into the water collection hopper 10 along the tip of the condenser cone 9. Meanwhile, the gas with lower humidity rises along the through hole A91 to the inlet pipe seat 23. The toxic and harmful components in the gas are absorbed by the activated carbon, and the harmless, low-temperature, and low-humidity gas is discharged along the exhaust pipe 25. During the exhaust process, the flowing gas drives the impeller B27 to rotate, which in turn drives the shaft B26 and the double-groove pulley 28 to rotate. The double-groove pulley 28 drives the single-groove pulley 22, as well as the shaft A20 and the impeller A21 to rotate. This causes the low-temperature air at the opening of the air guide shroud 19 to be drawn into the air guide shroud 19 and discharged along the through hole C191 under the drive of the impeller A21. Thus, the flowing air carries away the high temperature of the heat sink 18, thereby keeping the condenser cone 9 at a low temperature to ensure its efficiency in condensing steam. After steam sterilization, open cabinet door 2 and wait for the items to cool down before taking them out. Since cabinet door 2 is open, it no longer applies pressure to push plate 15. At this time, push plate 15 is pushed outward under the tension of spring A16 and drives sealing block 13 to slide through connecting rod 14. The through hole B131 of sealing block 13 is exactly connected to water inlet hole 122 and water outlet hole 123, so that the condensate in water receiving basin 10 flows back into heating base box 8 through water guide plate 7, avoiding water waste and effectively preventing low temperature water from entering the interior of heating base box 8 when steam is generated, causing the internal water temperature to drop.

[0034] Example 2

[0035] like Figure 4 and Figure 5 As shown, the pure steam sterilizer proposed in this utility model, compared with Embodiment 1, has a pressure relief assembly installed inside the exhaust pipe 25. The pressure relief assembly includes a fixing ring 30, a limiting rod 31, a sealing plate 32, and a spring B33. The fixing ring 30 is located inside the exhaust pipe 25 and connected to its inner wall. The fixing ring 30 has an annular groove 3001 with its opening facing upward. The limiting rod 31 is inserted into the annular groove 3001 from the bottom of the fixing ring 30 and is slidably connected to the fixing ring 30. The limiting rods 31 are arranged in a circular array about the center of the fixing ring 30, and the bottom end of the limiting rod 31 is connected to a limiting block 311. The sealing plate 32 is located inside the annular groove 3001 and is slidably connected to its inner wall. The bottom surface of the sealing plate 32 is connected to the upper surface of the limiting rod 31. The spring B33 is sleeved on the outside of the limiting rod 31, and the two ends of the spring B33 abut against the lower surface of the fixing ring 30 and the upper surface of the limiting block 311, respectively.

[0036] In this embodiment, when there is a large amount of steam and a high pressure inside the cabinet 1, the efficiency of high-temperature and high-pressure steam in sterilizing items can be effectively improved. When the steam pressure increases further, the high pressure will force open the sealing plate 32, thereby opening the channel of the fixing ring 30. Excess steam will be discharged along the channel. After the pressure is released inside the cabinet 1, the sealing plate 32 will reset under the tension of the spring B33 and enter the annular groove 3001, restoring the closed state.

[0037] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A pure steam sterilizer, characterized in that, include Cabinet (1), cabinet (1) is rotatably equipped with a cabinet door (2) that seals with it, and multiple sets of opposing brackets (5) are spaced apart on the inner wall of cabinet (1), and the brackets (5) are slidably connected to the basket (6). Heating base box (8) is set inside the cabinet (1) and located below the bottom placement basket (6); A condenser cone plate (9) is installed on the upper wall of the inner compartment of the cabinet (1) with its tip pointing downwards. The tip of the condenser cone plate (9) is provided with a through hole A (91) that communicates with the outside. The bottom of the condenser cone plate (9) is provided with a water collection hopper (10) for collecting condensate. The water collection hopper (10) is connected to a control valve. The control valve automatically opens when the cabinet door (2) is open and causes the condensate to automatically flow back into the heating bottom box (8). A heat-conducting plate (17) is inserted into the cabinet (1) and one end is connected to a condenser cone plate (9). The other end of the heat-conducting plate (17) is connected to a heat sink (18). An air guide shroud (19) is installed on the outside of the heat sink (18) on the cabinet (1). An auxiliary heat dissipation component is installed on the air guide shroud (19). Pipe seat (23), the pipe seat (23) is connected to the cabinet (1) and connected to the through hole A (91) and the exhaust pipe (25), and an air filter assembly is installed inside the pipe seat (23); Impeller B (27) is located inside the exhaust pipe (25) and is rotatably connected to its inner wall; And a transmission assembly, which drives the impeller B(27) and the auxiliary heat dissipation assembly.

2. The pure steam sterilizer according to claim 1, characterized in that, A sealing groove is provided on the cabinet body (1) around its opening, a sealing ring (3) that matches the sealing groove is provided on the cabinet door (2), and a control panel, handle and lock hook are provided on the cabinet door (2), and a buckle (4) that matches the lock hook is provided on the cabinet body (1).

3. The pure steam sterilizer according to claim 1, characterized in that, The heating box (8) includes a box body and a heater. The box body is connected to the upper surface of the bottom plate of the cabinet (1). The opening of the box body faces upward, and the heater is located inside the box body and below the liquid surface.

4. The pure steam sterilizer according to claim 3, characterized in that, A water guide plate (7) is provided inside the cabinet (1). A guide hole communicating with the opening of the box is provided on the water guide plate (7), and a conical groove communicating with the guide hole is provided on the water guide plate (7).

5. The pure steam sterilizer according to claim 4, characterized in that, The control valve includes a fixed seat (12), a sealing block (13), and a push plate (15); the fixed seat (12) is located between the water receiving hopper (10) and the water guide plate (7) and is connected to the side wall of the cabinet (1). The fixed seat (12) is provided with an inner cavity (121). The fixed seat (12) is provided with an inlet hole (122) and an outlet hole (123) communicating with the inner cavity (121). The outlet hole (123) is located directly below the inlet hole (122). The bottom of the water receiving hopper (10) is provided with a water guide pipe (11) communicating with its interior. The output end of the water guide pipe (11) is connected to the inlet hole (122); the sealing block (13) is set in the inner cavity (121) and is slidably connected to its inner wall. The sealing block (13) is provided with a through hole. B(131), sealing block (13) is connected to connecting rod (14), connecting rod (14) is slidably connected to fixed seat (12), and one end of connecting rod (14) extending out of fixed seat (12) is connected to push plate (15); fixed seat (12) is provided with a slide groove (124) with an opening consistent with the opening of cabinet (1), and spring A (16) is provided in slide groove (124). Spring A (16) is sleeved on connecting rod (14) and abuts against the inner wall of slide groove (124) and push plate (15). When spring A (16) is extended, through hole B (131) connects water inlet hole (122) and water outlet hole (123). When spring A (16) is contracted, it closes water inlet hole (122) and water outlet hole (123).

6. The pure steam sterilizer according to claim 1, characterized in that, The auxiliary heat dissipation components include a rotating shaft A (20) and an impeller A (21); the heat sink (18) and the air guide shroud (19) include two sets, the air inlets of the two air guide shrouds (19) are opposite to each other, and a through hole C (191) is provided on each of the two air guide shrouds (19). A fixed frame A is provided in the through hole C (191), the rotating shaft A (20) is rotatably connected to the fixed frame, and the impeller A (21) is coaxially connected to the rotating shaft A (20).

7. The pure steam sterilizer according to claim 6, characterized in that, A fixed frame B is installed inside the exhaust pipe (25). The fixed frame B is rotatably connected to the rotating shaft B (26). The impeller B (27) is coaxially connected to the rotating shaft B (26).

8. The pure steam sterilizer according to claim 7, characterized in that, The transmission assembly includes a single-groove pulley (22), a double-groove pulley (28), and a toothed belt (29); the single-groove pulley (22) is coaxially connected to the rotating shaft A (20), the double-groove pulley (28) is coaxially connected to the rotating shaft B (26), and the double-groove pulley (28) is connected to the single-groove pulleys (22) on both sides through a toothed belt (29).

9. The pure steam sterilizer according to claim 1, characterized in that, The air filter assembly includes a storage box (24) filled with an adsorbent for adsorbing toxic and harmful gases; the storage box (24) is inserted into the tube seat (23) and slidably connected to its inner wall, and the bottom plate of the storage box (24) is a breathable plate.

10. The pure steam sterilizer according to claim 1, characterized in that, A pressure relief assembly is installed inside the exhaust pipe (25). The pressure relief assembly includes a fixing ring (30), a limiting rod (31), a sealing plate (32), and a spring B (33). The fixing ring (30) is located inside the exhaust pipe (25) and connected to its inner wall. An annular groove (3001) with its opening facing upward is provided on the fixing ring (30). The limiting rod (31) is inserted into the annular groove (3001) from the bottom of the fixing ring (30) and is slidably connected to the fixing ring (30). Each limiting rod (31) The fixed ring (30) is arranged in a ring array around its center. The bottom end of the limiting rod (31) is connected to the limiting block (311). The sealing plate (32) is located in the annular groove (3001) and is slidably connected to its inner wall. The bottom surface of the sealing plate (32) is connected to the upper surface of the limiting rod (31). The spring B (33) is sleeved on the outside of the limiting rod (31). The two ends of the spring B (33) abut against the lower surface of the fixed ring (30) and the upper surface of the limiting block (311), respectively.

Images