A press platen lifting device

Abstract

This utility model discloses a pressure plate lifting device, comprising: a pressure plate, an inflation assembly, and a control device; the pressure plate is capable of reciprocating along the axial direction of the barrel lid; the inflation assembly is disposed on the barrel lid or the pressure plate, and the control device is connected to the inflation assembly; the control device is disposed on the barrel lid or the pressure plate, and is used to control the connection and disconnection of the inflation assembly. This utility model provides a pressure plate lifting device that can effectively provide an upward thrust, thereby enabling the pressure plate to smoothly reset, avoiding the operational difficulties caused by excessive suction in traditional oil drum pressure plate assemblies, greatly reducing the labor intensity of operators, reducing clothing contamination caused by strong pulling, improving operational efficiency, and making oil drum replacement more convenient. The control device of this application can prevent the pressure plate from continuing to rise, avoiding over-inflation, thereby preventing damage to the device.

Description

Technical Field

[0001] This utility model relates to the technical field of lubricating grease, and in particular to a pressure plate lifting device. Background Technology

[0002] In existing oil drum pressure plate systems, oil is extracted from the drum using an oil pump. However, as the amount of oil decreases during extraction, the height of the pressure plate decreases accordingly, resulting in a strong suction force between the pressure plate and the bottom of the drum. This suction force makes it difficult for operators to change oil drums, especially when the pressure plate is stuck to the bottom, often requiring considerable force to remove it. This process is not only time-consuming and labor-intensive but also easily soils the operators' clothes, increasing inconvenience and labor intensity. Utility Model Content

[0003] Therefore, it is necessary to provide a pressure plate lifting device to solve the above-mentioned technical problems.

[0004] A pressure plate lifting device, the pressure plate lifting device comprising:

[0005] Bucket lid;

[0006] A pressure plate, which is capable of reciprocating along the axial direction of the barrel lid;

[0007] An inflation assembly is disposed on the lid or the pressure plate. One end of the inflation assembly is configured to communicate with an external air source, and the other end of the inflation assembly is communicated with the pressure plate and extends into the bottom of the pressure plate. The external air source is used to introduce gas into the inflation assembly so that the gas can be filled into the space below the pressure plate.

[0008] A control device, which is connected to the inflation assembly; the control device is disposed on the lid and configured to abut against the pressure plate to control the disconnection of the inflation assembly; or the control device is disposed on the pressure plate and configured to abut against the lid to control the disconnection of the inflation assembly.

[0009] Optionally, the inflation assembly includes an air inlet pipe and an air outlet pipe. The air inlet pipe is disposed on the barrel cover, and the air outlet pipe is disposed in the oil storage chamber. One end of the air inlet pipe is configured to communicate with an external air source, and the other end of the air inlet pipe is communicated with one end of the control device. The other end of the control device is communicated with one end of the air outlet pipe, and the other end of the air outlet pipe is communicated with the pressure plate and extends to the bottom of the pressure plate. The control device is used to control the connection and disconnection between the air inlet pipe and the air outlet pipe.

[0010] Optionally, the control device includes a valve body and a valve core. The valve body is disposed on the barrel lid. The valve body has an air inlet channel, an air flow channel, and an air outlet channel that are connected in sequence inside. The air inlet channel is also connected to an air inlet pipe, and the air outlet channel is also connected to an air outlet pipe. The valve core is disposed in the air flow channel and can move along the air flow channel to realize the connection and disconnection of the air inlet channel and the air outlet channel, thereby realizing the connection and disconnection between the air inlet pipe and the air outlet pipe.

[0011] Optionally, the valve core includes a first body, a sealing part, and a second body. The sealing part is disposed between the first body and the second body, and its diameter is larger than the diameters of the first body and the second body. The first body is located above the second body. The airflow channel includes a first channel, a sealing channel, and a second channel. The sealing channel is disposed between the first channel and the second channel, and the first channel is located above the second channel. The first body is disposed within the first channel and extends out of the top of the valve body and the lid. The diameter of the sealing channel gradually decreases from the end connected to the second channel to the end connected to the first channel. The diameter of the sealing part is smaller than the maximum diameter of the sealing channel but larger than the minimum diameter of the sealing channel. The sealing part is partially disposed within the sealing channel. The second body is disposed within the second channel and extends out of the bottom of the valve body. The second body is configured to abut against the pressure plate, which is used to push the valve core to move along the airflow channel.

[0012] Optionally, the outer wall of the sealing part is provided with a first groove, and the valve core further includes a first sealing ring, which is disposed in the first groove.

[0013] Optionally, the first body includes a first connecting portion and a second connecting portion, the first connecting portion being disposed at the top end of the second connecting portion, the sealing portion being disposed at the bottom end of the second connecting portion, and the diameter of the first connecting portion being larger than the diameter of the second connecting portion.

[0014] Optionally, the valve core further includes a second sealing ring, and the valve body also has a second groove. The second groove surrounds the first channel, the second sealing ring is disposed in the second groove, and the second sealing ring is sleeved on the outside of the first connecting part.

[0015] Optionally, the inflation assembly further includes a first limiting part and a second limiting part connected to each other. The valve body also has a limiting cavity inside, which is connected to the second channel. The first limiting part is disposed in the limiting cavity. Both the first limiting part and the second limiting part are sleeved on the outside of the second main body. The second limiting part is disposed at the bottom of the valve body. The diameter of the second limiting part is larger than the diameter of the first limiting part.

[0016] Optionally, the valve core further includes a third sealing ring, and a third groove is provided inside the second limiting portion. The third groove surrounds the second body, and the third sealing ring is disposed in the third groove and sleeved on the outside of the second body.

[0017] Optionally, the valve body may also have a first intermediate section and a second intermediate section inside. The first intermediate section is disposed between the air intake channel and the air flow channel to achieve communication between the air intake channel and the air flow channel. The second intermediate section is disposed between the air flow channel and the air outlet channel to achieve communication between the air flow channel and the air outlet channel.

[0018] This invention provides a pressure plate lifting device. By incorporating an inflation component, when the pressure plate needs to be reset, an external air source is connected to the inflation component. The external air source supplies gas into the inflation component, which then pumps the gas into the space below the pressure plate. The supplied gas creates an upward thrust on the pressure plate, thus resetting it. This pressure plate lifting device effectively provides an upward thrust, allowing the pressure plate to reset smoothly. It avoids the operational difficulties caused by excessive suction in traditional oil drum pressure plate assemblies, significantly reducing the labor intensity of operators, minimizing clothing contamination from forceful pulling, improving operational efficiency, and making oil drum replacement more convenient. This invention also includes a control device to control the on / off state of the inflation component. When the pressure plate is raised to a certain height, the control device abuts against the pressure plate or the lid, cutting off the inflation component and stopping the supply of air to the bottom of the pressure plate, thus stopping its ascent. The control device of this application can prevent the pressure plate from rising further, avoid over-inflation, and thus avoid damage to the device. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the pressure plate lifting device in one embodiment;

[0021] Figure 2 This is a schematic diagram of a pressure plate lifting device that does not include the barrel body in one embodiment;

[0022] Figure 3 This is a partial structural schematic diagram of the inflatable component in one embodiment;

[0023] Figure 4 This is a partial cross-sectional view of the inflation assembly in one embodiment;

[0024] Figure 5 This is a schematic diagram of the valve body in one embodiment;

[0025] Figure 6 A schematic diagram of the valve core in one embodiment.

[0026] 1. Oil drum; 11. Oil storage chamber; 12. Drum lid; 13. Drum body; 2. Pressure plate; 3. Oil pump; 4. Inflator assembly; 41. Air inlet pipe; 42. Valve body; 421. Air inlet channel; 422. Air outlet channel; 423. Airflow channel; 424. First channel; 4241. First connecting section; 4242. Second connecting section; 425. Sealing channel; 426. Second channel; 427. Second groove; 428. Limit 43. Vent cavity; 44. Air outlet pipe; 44. Valve core; 441. First body; 442. Sealing part; 443. Second body; 444. First groove; 445. First sealing ring; 446. First connecting part; 447. Second connecting part; 448. Second sealing ring; 449. Third sealing ring; 45. First limiting part; 46. Second limiting part; 461. Third groove; 5. First intermediate section; 6. Second intermediate section.

[0027] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0028] 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 scope of protection of the present utility model.

[0029] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0030] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the term "and / or" throughout the text includes three solutions; taking A and / or B as an example, it includes technical solution A, technical solution B, and a technical solution that simultaneously satisfies A and B. Furthermore, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0031] refer to Figures 1 to 2 This utility model provides a pressure plate lifting device for oil drums. The pressure plate lifting device includes a drum cover 13, a pressure plate 2, an oil pump 3, an inflation component 4, and a control device. An oil storage chamber 11 is provided inside the oil drum 1 to hold oil. The oil drum 1 includes a drum body 13, and a drum cover 12 is detachably mounted on the top of the drum body 13. The pressure plate 2 is sealed within the oil storage chamber 11 and can reciprocate along the axial direction of the oil storage chamber 11. The oil pump 3 is partially located at the top of the drum cover 12 and is connected to the space formed between the bottom of the pressure plate 2 and the oil storage chamber 11. The inflation component 4 is located within the oil storage chamber 11, with one end extending out of the drum cover 13. The top of the pressure plate 2 is configured to communicate with an external air source. The other end of the inflation component 4 is connected to the pressure plate 2 and extends into the bottom of the pressure plate 2. The external air source is used to introduce gas into the inflation component 4 so that the gas can fill the space formed by the bottom of the pressure plate 2 and the oil storage chamber 11. The oil pump 3 is also used to extract oil from the oil storage chamber 11. The control device is connected to the inflation component 4. In this embodiment, the control device is located on the barrel cover 12 and is configured to abut against the pressure plate 2 to control the disconnection of the inflation component 4. In other embodiments, the control device is located on the pressure plate 2 and is configured to abut against the barrel cover 12 to control the disconnection of the inflation component 4.

[0032] When the oil drum 1 is full of oil, the pressure plate 2 is located at the top of the oil drum 1. After the oil pump 3 pumps oil for a period of time, the oil is pumped away, causing the pressure plate 2 to drop. When the oil is insufficient, the oil drum 1 needs to be replaced. This utility model provides a pressure plate lifting device. By setting an inflation component 4, when the pressure plate 2 needs to be reset, the external air source and the inflation component 4 are connected, allowing the external air source to introduce gas into the inflation component 4. The inflation component 4 then inputs the gas into the space formed between the bottom of the pressure plate 2 and the oil storage chamber 11. The introduced gas can generate an upward thrust on the pressure plate 2, thereby driving the pressure plate 2 to reset. Through the pressure plate lifting device of this utility model, the inflation component 4 can effectively provide an upward thrust, thereby allowing the pressure plate 2 to reset smoothly. This avoids the operational difficulties caused by excessive suction in traditional oil drum pressure plate sets, greatly reduces the labor intensity of operators, reduces clothing contamination caused by strong pulling, improves operational efficiency, and makes the replacement of the oil drum 1 more convenient.

[0033] This invention also includes a control device to control the on / off state of the inflation component 4. When the pressure plate 2 is raised to a certain height, the control device abuts against the pressure plate 2 or the lid 12, cutting off the inflation component 4 and stopping the supply of air to the bottom of the pressure plate 2, thus stopping the pressure plate 2 from rising. Compared to existing technologies where the inflation component requires manual operation, which is susceptible to human error, leading to over-inflation or the pressure plate not reaching the preset height before the inflation component is disconnected, this invention's control device automatically disconnects the inflation component when the pressure plate reaches a certain height, preventing over-inflation and the pressure plate from continuing to rise or being forcibly stopped before reaching the preset height.

[0034] In this embodiment, the pressure plate lifting device is used to extract grease, specifically butter, from an oil drum. This pressure plate lifting device can also be used to extract semi-solid or liquid substances from other barrel-shaped containers.

[0035] refer to Figures 1-5 The inflation assembly 4 includes an air inlet pipe 41 and an air outlet pipe 43. The air inlet pipe 41 is located on the top of the barrel cover 12. One end of the air inlet pipe 41 is configured to be connected to an external air source. The other end of the air inlet pipe 41 is connected to one end of the control device. The other end of the control device is connected to one end of the air outlet pipe 43. The other end of the air outlet pipe 43 is connected to the pressure plate 2. The air outlet pipe 43 is located in the oil storage chamber 11. The gas introduced from the external air source enters the control device through the air inlet pipe 41 and finally flows out to the bottom of the pressure plate 2 through the air outlet pipe 43.

[0036] The control device includes a valve body 43 and a valve core 44. The valve body 42 is located at the bottom of the barrel cover 12. The valve body 42 has an air inlet channel 421 and an air outlet channel 422 inside. The air inlet channel 421 and the air outlet channel 422 are connected. The air inlet pipe 41 extends into the air inlet channel 421, and the air outlet pipe 43 extends into the air outlet channel 422. The gas is introduced into the air inlet channel 421 through the air inlet pipe 41, then flows into the air outlet channel 422, and finally flows out to the bottom of the pressure plate 2 through the air outlet pipe 43.

[0037] In other embodiments, other devices that can provide an external air source, such as air pumps, air compressors, etc., may be used.

[0038] Specifically, the top of the lid 12 is provided with an air inlet, the air inlet pipe 41 is connected to the air inlet, and the air outlet pipe 43 is a flexible hose to avoid the air outlet pipe 43 obstructing the movement of the pressure plate 2.

[0039] refer to Figures 1 to 6 The valve body 42 has an airflow channel 423 inside, which is located between the air inlet channel 421 and the air outlet channel 422. The two sides of the airflow channel 423 are connected to the air inlet channel 421 and the air outlet channel 422 respectively. The valve core 44 is partially located in the airflow channel 423. One end of the valve core 44 is exposed at the top of the valve body 42, and the other end of the valve core 44 is exposed at the bottom of the valve body 42. The valve core 44 can move along the airflow channel 423 to realize the connection and disconnection of the air inlet channel 421 and the air outlet channel 422.

[0040] Specifically, the top of the barrel lid 12 and the valve body 42 are provided with clearance holes corresponding to the position of the valve core 33, so as to avoid the valve core 44 and facilitate the valve core 44 to move up and down along the axial direction of the valve body 42.

[0041] refer to Figures 3-6The valve core 44 includes a first body 441, a sealing part 442, and a second body 443. The sealing part 442 is disposed between the first body 441 and the second body 443, and the diameter of the sealing part 442 is larger than the diameters of the first body 441 and the second body 443. The first body 441 is located above the second body 443. The airflow channel 423 includes a first channel 424, a sealing channel 425, and a second channel 426. The sealing channel 425 is disposed between the first channel 424 and the second channel 426, and the first channel 424 is disposed above the second channel 426. In this valve body 42, the first main body 441 is disposed within the first channel 424 and extends to the top of the valve body 42. The diameter of the sealing channel 425 gradually decreases from the end connected to the second channel 426 to the end connected to the first channel 424. The diameter of the sealing part 442 is smaller than the maximum diameter of the sealing channel 425 and larger than the minimum diameter of the sealing channel 425. A part of the sealing part 442 is disposed within the sealing channel 425, and another part of the sealing part 442 is disposed within the second channel 426. The second main body 443 is disposed within the second channel 426 and extends to the bottom of the valve body 42.

[0042] refer to Figure 6 The outer wall of the sealing part 442 is provided with a first groove 444, and the valve core 44 also includes a first sealing ring 445. The first sealing ring 445 is disposed in the first groove 444 to achieve a seal between the sealing part 442 and the sealing channel 425, thereby blocking the air intake channel 421 and the air outlet channel 422.

[0043] Specifically, the inflation assembly 4 has a blocked state and a connected state. The sealing part 442 can move up and down along the sealing channel 425 to realize the switching of the inflation assembly 4 between the blocked state and the connected state. When the first sealing ring 445 moves upward to abut against the inner wall of the sealing channel 425, the inflation assembly 4 is in the blocked state. When the first sealing ring 445 moves downward and the first sealing ring 445 disengages from the inner wall of the sealing channel 425, the inflation assembly 4 switches to the connected state.

[0044] refer to Figure 6 The first body 441 includes a first connecting part 446 and a second connecting part 447. The first connecting part 446 is disposed at the top end of the second connecting part 447, and the sealing part 442 is disposed at the bottom end of the second connecting part 447. The diameter of the first connecting part 446 is larger than the diameter of the second connecting part 447, so that a gap is formed between the second connecting part 447 and the first channel 424 to allow gas flow.

[0045] Specifically, the first channel 424 includes a first connecting segment 4241 and a second connecting segment 4242. The top ends of the first connecting segment 4241 and the second connecting segment 4242 are connected, and the bottom end of the second connecting segment 4242 is connected to the top end of the sealing channel 425. The diameter of the second connecting segment 4242 is larger than the diameter of the first connecting segment 4241. A first connecting part 446 is disposed within the first connecting segment 4241. A portion of the second connecting part 447 is disposed within the first connecting segment 4241, and another portion is disposed within the second connecting segment 4242. The diameter of the second connecting part 447 is smaller than the diameter of the first connecting segment 4241, so that a gap is formed between the second connecting part 447 and the first connecting segment 4241 and the second connecting segment 4242 for gas to pass through.

[0046] refer to Figure 5 and Figure 6 The valve core 44 also includes a second sealing ring 448, and the valve body 42 is also provided with a second groove 427. The second groove 427 is arranged around the first connecting section 4241, and the second sealing ring 448 is disposed in the second groove 427. The diameter of the first connecting part 446 is equal to or slightly smaller than the diameter of the first connecting section 4241. The second sealing ring 448 is sleeved on the outside of the first connecting part 446 to achieve a seal between the first connecting part 446 and the first connecting section 4241, so as to prevent gas from leaking out from the first connecting section 4241.

[0047] refer to Figures 3-6 The inflation assembly 4 also includes a first limiting part 45 and a second limiting part 46 connected to each other. The valve body 42 also has a limiting cavity 428 inside, which is connected to the second channel 426. The first limiting part 45 is disposed in the limiting cavity 428. The first limiting part 45 and the second limiting part 46 are both sleeved on the outside of the second main body 443. The second limiting part 46 is disposed at the bottom of the outside of the valve body 42. The diameter of the second limiting part 46 is larger than the diameter of the first limiting part 45. The diameter of the first limiting part 45 is larger than the diameter of the sealing part 442. The valve core 44 can move relative to the first limiting part 45 and the second limiting part 46. Through the cooperation of the first limiting part 45 and the second limiting part 46, and the fact that the diameter of the first limiting part 45 is larger than the diameter of the sealing part 442, the valve core 44 can be positioned, thereby preventing the valve core 44 from falling off the valve body 42.

[0048] refer to Figure 4 The valve core 44 also includes a third sealing ring 449. A third groove 461 is provided inside the second limiting part 46. The third groove 461 surrounds the second body 443. The third sealing ring 449 is disposed in the third groove 461 and sleeved on the outside of the second body 443 to achieve sealing between the second body 443 and the second limiting part 46, and prevent gas from leaking out from the gap between the second body 443 and the second limiting part 46.

[0049] refer to Figure 3 The valve body 42 is also provided with a first intermediate section 5 and a second intermediate section 6. The first intermediate section 5 is located between the air intake channel 421 and the air flow channel 423 to achieve communication between the air intake channel 421 and the air flow channel 423. The second intermediate section 6 is located between the air flow channel 423 and the air outlet channel 422 to achieve communication between the air flow channel 423 and the air outlet channel 422.

[0050] Specifically, when the pressure plate lifting device of this utility model needs to be operated, the pipe of the external air source is inserted into the air inlet pipe 41 of this utility model, and the valve core 44 is pressed to the bottom, that is, the bottom end of the sealing part 442 abuts against the top end of the first limiting part 45, the second body 443 is exposed at the bottom end of the valve body 42, the inflation component 4 is switched to the connected state, and the gas output from the external air source enters the air inlet channel 421 of the valve core 44 through the air inlet pipe 41, and then enters the airflow channel 423 through the first intermediate section 5. In the airflow channel 423, the gas enters the second intermediate section 6 in sequence along the gap between the sealing part 442 and the second channel 426, the gap between the sealing part 442 and the sealing channel 425, and the gap between the second connecting part 447 and the first channel 424, and then enters the space formed by the bottom of the pressure plate 2 and the oil storage chamber 11 through the air outlet pipe 43. Because the pressure plate 2 is in close contact with the oil drum 1, the input gas will not leak out. The continuously input gas will lift the pressure plate 2 along the oil pump 3 and the oil drum 1. When the pressure plate 2 rises to a position that just contacts the bottom of the second body 443 of the valve core 44, gas continues to enter, and the pressure plate 2 continues to rise. The pressure plate 2 pushes the valve core 44 to move upward as well. When the valve core 44 rises to a certain height, the first body 441 is exposed in the drum cover 12. At this time, the first sealing ring 445 abuts against the inner wall of the sealing part 442, and the valve core 44 will cut off the connection between the air inlet pipe 41 and the air outlet pipe 43. The inflation assembly 4 switches to the blocking state, so that the pressure plate 2 will stop moving upward on its own. At this time, the top of the valve core 44, i.e. the first body 441, is exposed in the top of the valve body 22 and the drum cover 12, and it will no longer rise. This makes it easy for the operator to observe that the pressure plate 2 has been reset and to turn off the oil pump 3. Finally, the operation of replacing the oil drum 1 is performed.

[0051] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the inventive concept of this utility model and the contents of this utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A pressure plate lifting device, characterized in that, include: Bucket lid; A pressure plate, which is capable of reciprocating along the axial direction of the barrel lid; An inflation assembly is disposed on the lid or the pressure plate. One end of the inflation assembly is configured to communicate with an external air source, and the other end of the inflation assembly is communicated with the pressure plate and extends into the bottom of the pressure plate. The external air source is used to introduce gas into the inflation assembly so that the gas can be filled into the space below the pressure plate. A control device, which is connected to the inflation assembly, is used to control the disconnection of the inflation assembly.

2. The pressure plate lifting device according to claim 1, characterized in that, The inflation assembly includes an air inlet pipe and an air outlet pipe. The air inlet pipe is disposed on the barrel lid. One end of the air inlet pipe is configured to communicate with an external air source. The other end of the air inlet pipe is connected to one end of the control device. The other end of the control device is connected to one end of the air outlet pipe. The other end of the air outlet pipe is connected to the pressure plate and extends to the bottom of the pressure plate. The control device is used to control the connection and disconnection between the air inlet pipe and the air outlet pipe.

3. The pressure plate lifting device according to claim 2, characterized in that, The control device is disposed on the lid and configured to abut against the pressure plate to control the disconnection of the inflation assembly; or the control device is disposed on the pressure plate and configured to abut against the lid to control the disconnection of the inflation assembly.

4. The pressure plate lifting device according to claim 3, characterized in that, The control device includes a valve body and a valve core. The valve body is disposed on the barrel lid. The valve body has an air inlet channel, an air flow channel, and an air outlet channel that are connected in sequence inside the valve body. The air inlet channel is also connected to the air inlet pipe, and the air outlet channel is also connected to the air outlet pipe. The valve core is disposed in the air flow channel and can move along the air flow channel to realize the connection and disconnection of the air inlet channel and the air outlet channel, thereby realizing the connection and disconnection between the air inlet pipe and the air outlet pipe.

5. The pressure plate lifting device according to claim 4, characterized in that, The valve core includes a first body, a sealing part, and a second body. The sealing part is disposed between the first body and the second body, and its diameter is larger than the diameters of the first body and the second body. The first body is located above the second body. The airflow channel includes a first channel, a sealing channel, and a second channel. The sealing channel is disposed between the first channel and the second channel, and the first channel is located above the second channel. The first body is disposed within the first channel and extends out of the top of the valve body and the lid. The diameter of the sealing channel gradually decreases from the end connected to the second channel to the end connected to the first channel. The diameter of the sealing part is smaller than the maximum diameter of the sealing channel but larger than the minimum diameter of the sealing channel. The sealing part is partially disposed within the sealing channel. The second body is disposed within the second channel and extends out of the bottom of the valve body. The second body is configured to abut against the pressure plate, which is used to push the valve core to move along the airflow channel.

6. The pressure plate lifting device according to claim 5, characterized in that, The outer wall of the sealing part is provided with a first groove, and the valve core also includes a first sealing ring, which is disposed in the first groove.

7. The pressure plate lifting device according to claim 5, characterized in that, The first main body includes a first connecting part and a second connecting part. The first connecting part is disposed at the top end of the second connecting part, and the sealing part is disposed at the bottom end of the second connecting part. The diameter of the first connecting part is larger than the diameter of the second connecting part.

8. The pressure plate lifting device according to claim 5, characterized in that, The valve core also includes a second sealing ring, and the valve body also has a second groove. The second groove surrounds the first channel, the second sealing ring is disposed in the second groove, and the second sealing ring is sleeved on the outside of the first connecting part.

9. The pressure plate lifting device according to claim 5, characterized in that, The inflation assembly also includes a first limiting part and a second limiting part connected to each other. The valve body also has a limiting cavity inside, which is connected to the second channel. The first limiting part is disposed in the limiting cavity. Both the first limiting part and the second limiting part are sleeved on the outside of the second main body. The second limiting part is disposed at the bottom of the valve body. The diameter of the second limiting part is larger than the diameter of the first limiting part.

10. The pressure plate lifting device according to claim 9, characterized in that, The valve core also includes a third sealing ring. The second limiting part has a third groove inside. The third groove surrounds the second body. The third sealing ring is disposed in the third groove and is sleeved on the outside of the second body.

Images