Anesthesia machine adjustable pressure limiting valve with quick pressure relief function

Abstract

The invention relates to the technical field of medical instruments, in particular to an anesthesia machine adjustable pressure limiting valve with a quick pressure relief function, which comprises a valve body assembly, a valve core assembly and a valve port assembly, the valve body assembly comprises a limiting base and a base fixing ring arranged on the outer ring face of the limiting base. The valve element assembly is arranged in the valve body assembly and comprises a pressure adjusting ring, a pressure adjusting spring limiting ring, a pressure adjusting shaft, a pressure adjusting spring, a pressure adjusting sleeve, a pressure adjusting sliding barrel and a rapid pressure relief shaft. By arranging the valve body assembly and the valve element assembly, the quick pressure relief function is achieved, the overhigh pressure can be quickly released in emergency, and the safety of a patient is improved; meanwhile, through cooperation of a pressure adjusting spring and a pressure adjusting shaft, the pressure adjusting precision is improved, and the requirements of high-precision medical equipment are met; and the pressure limiting valve is simple and reliable in structure, easy to operate and maintain, and suitable for use environments of various medical devices.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to an adjustable pressure limiting valve for an anesthesia machine with a rapid pressure relief function. Background Technology

[0002] Anesthesia machines and ventilators are indispensable equipment in modern medicine, and the stability and safety of their respiratory circuit systems are crucial. Adjustable pressure relief valves (APL valves), as key components of the respiratory circuit system, are primarily used to regulate and release excessive pressure in the system to ensure patient safety. Currently, APL valves on the market mainly achieve pressure regulation and relief functions through simple mechanical structures, but their pressure relief speed and accuracy have certain limitations. With the advancement of medical technology, the performance requirements for APL valves are becoming increasingly stringent, especially the need for rapid pressure relief in emergency situations.

[0003] In existing technologies, the pressure relief function of APL valves is typically achieved through the cooperation of the valve core assembly and the valve port seal on the valve seat. When the pressure in the gas circuit exceeds the set pressure relief value, the gas pressure pushes open the seal or valve core assembly, releasing the gas and relieving pressure; when the pressure in the gas circuit drops, the seal or valve core assembly resets, pressing the valve port shut and blocking gas release, causing the pressure in the gas circuit to rise. Furthermore, some APL valves adjust pressure accuracy by regulating the spring compression ratio. However, these solutions are not ideal in terms of pressure relief speed and cannot meet the rapid pressure relief requirements in emergency situations.

[0004] The main drawback of existing APL valves is their inability to achieve rapid pressure relief. Because the valve core assembly requires a certain amount of time to reset and seal, the pressure relief process is slow, potentially failing to release excessive pressure in time during emergencies, thus affecting patient safety. Furthermore, existing APL valves have limited pressure regulation accuracy, making it difficult to meet the needs of high-precision medical equipment.

[0005] Therefore, this application provides an adjustable pressure limiting valve for an anesthesia machine with a rapid pressure relief function. Summary of the Invention

[0006] The purpose of this application is to solve at least one technical problem raised in the background art.

[0007] This application provides an adjustable pressure limiting valve for an anesthesia machine with a rapid pressure relief function, including a valve body assembly, a valve core assembly, and a valve port assembly; The valve body assembly includes a limiting base and a base fixing ring disposed on the outer ring surface of the limiting base. A valve body limiting ring is disposed between the limiting base and the base fixing ring. The valve body assembly also includes an annular handle disposed on the upper surface of the base fixing ring. The valve core assembly is disposed inside the valve body assembly. The valve core assembly includes a pressure regulating ring, a pressure regulating spring limiting ring, a pressure regulating shaft, a pressure regulating spring, a pressure regulating sleeve, a pressure regulating slide, and a quick-release shaft. The pressure regulating ring is disposed through the bottom of the limiting base. The pressure regulating sleeve is disposed inside the valve body limiting ring, and the pressure regulating slide is disposed inside the pressure regulating sleeve. The pressure regulating shaft is disposed inside the pressure regulating slide. The quick-release shaft is disposed inside the pressure regulating shaft and passes through the pressure regulating shaft. The pressure regulating spring is sleeved on the outer surface of the quick-release shaft and is disposed between the pressure regulating shaft and the pressure regulating ring. The pressure regulating spring limiting ring is disposed at the top of the pressure regulating ring. The valve port assembly is located below the valve body assembly.

[0008] Preferably, the outer ring of the valve body limiting ring is provided with a handle limiting ring, and the top of the annular handle is provided with a handle cover.

[0009] By adopting the above technical solution, the valve body assembly limits the APL valve scale position through the base fixing ring, and the annular handle and handle limiting ring are fastened with screws to prevent loosening.

[0010] Preferably, a zero-position spring is provided inside the pressure regulating sleeve on the outer surface of the pressure regulating slide, and a spring washer is provided at the bottom of the zero-position spring.

[0011] By adopting the above technical solution, the APL valve body limiting ring and the pressure regulating slide are provided with grooves and bosses. When the APL valve is set to the zero position, the boss enters the groove, changing the free extension height of the pressure regulating spring, so that the pressure returns to zero.

[0012] Preferably, a spring limit seat is provided on the outer surface of the top end of the pressure regulating sleeve, and an upward spring is sleeved on the outer surface of the pressure regulating sleeve at the bottom end of the spring limit seat.

[0013] By adopting the above technical solution, the quick pressure relief shaft is lifted by raising the ring handle, and the quick pressure relief shaft is lifted and disengaged from the pressure regulating ring to achieve quick pressure relief.

[0014] Preferably, the top end of the valve body limiting ring is provided with a quick-release limiting sleeve, the top end of the quick-release limiting sleeve is provided with a ball fixing plate, the upper surface of the ball fixing plate is provided with a ball shaft, and the outer surface of the ball shaft is fitted with a ball spring.

[0015] Preferably, the top of the pressure regulating sleeve is provided with a quick-release shaft fixing plate, and the quick-release shaft is located below the quick-release shaft fixing plate.

[0016] By adopting the above technical solution, it is easy to quickly unload the pressure shaft for fixing and limiting.

[0017] Preferably, the valve port assembly includes a support frame disposed below the limiting base and an annular valve port disposed at the bottom of the support frame. A valve port diaphragm is disposed inside the annular valve port, and a valve body slide rod is disposed at the bottom end of the pressure regulating ring. The bottom end of the valve body slide rod passes through the annular valve port.

[0018] Preferably, the bottom of the base fixing ring is provided with a quick positioning mechanism, which is used to quickly fix the adjustable pressure limiting valve of the anesthesia machine onto the mounting shell at a designated position. The quick positioning mechanism includes a plug ring fixed on the surface of the mounting shell and an annular plug groove formed on the lower surface of the base fixing ring and adapted to the plug ring.

[0019] By adopting the above technical solution, it is easy to fix the pressure relief valve to the surface of the mounting housing by inserting a plug ring.

[0020] Preferably, the inner top wall of the annular insertion groove is fixedly provided with an annular inflatable airbag, and the inner side wall of the annular insertion groove is provided with a plurality of cylindrical cavities in a circumferential array. The inner wall of the cylindrical cavity is fixedly provided with an inflatable airbag column, and the end of the inflatable airbag column is fixedly provided with a locking column that is slidably connected to the inner wall of the cylindrical cavity. The inner annular surface of the insertion ring is provided with a locking groove that matches the locking column. The end of the inflatable airbag column is provided with an inflation tube extending into the interior of the annular inflatable airbag. The end of the inflatable airbag column is also provided with a pressure relief tube extending into the outer surface of the base fixing ring, and the end of the pressure relief tube is provided with a pressure relief valve. The end of the annular inflatable airbag is provided with an air intake tube extending into the outer surface of the base fixing ring. The surface of the air intake tube is provided with an air intake one-way valve, and the end of the air intake tube is provided with a filter cover. The inner wall of the annular inflatable airbag is fixedly provided with a plurality of first return springs in a circumferential array, and the inner wall of the inflatable airbag column is fixedly provided with a second return spring.

[0021] By adopting the above technical solution, the locking pin can be automatically inserted into the locking groove by squeezing the annular inflatable airbag through the plug ring, thereby achieving effective locking and fixing of the plug ring. At the same time, when disassembling, it is only necessary to open the pressure relief valve, so that the air in the inflatable airbag column can be discharged through the pressure relief pipe under the action of the second return spring, which will drive the locking pin out of the locking groove, achieving the purpose of quick disassembly. Moreover, after the base fixing ring is separated from the mounting shell, the annular inflatable airbag can be drawn into the interior of the annular inflatable airbag through the air suction pipe under the action of the first return spring, achieving automatic reset of the annular inflatable airbag.

[0022] Preferably, the lower surface of the base fixing ring is provided with an annular sealing groove, the inner wall of the annular sealing groove is fixed with a sealing airbag ring, and the sealing airbag ring is inflated and abuts against the outer surface of the mounting shell, and the end of the inflated airbag column is provided with a connecting pipe extending into the interior of the sealing airbag ring.

[0023] By adopting the above technical solution, the gap between the base fixing ring and the mounting shell can be automatically and effectively sealed.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. The adjustable pressure relief valve for an anesthesia machine with rapid pressure relief function described in this application comprises a valve body assembly and a valve core assembly. The valve body assembly defines the APL valve scale position via a base fixing ring. A ring-shaped handle and a handle limiting ring are secured with screws to prevent loosening. Simultaneously, the pressure regulating shaft has a groove for easy rotation. Rotating the pressure regulating shaft adjusts the distance of the rapid pressure relief shaft, thereby adjusting the compression ratio of the pressure regulating spring and achieving precise adjustment of the APL valve. Furthermore, raising the ring-shaped handle lifts the rapid pressure relief shaft, disengaging it from the pressure regulating ring to achieve rapid pressure relief. After pressure relief is complete, releasing the ring-shaped handle... The handle ensures that the pressure relief shaft and pressure regulating ring maintain their original pressure contact. Furthermore, the APL valve body's limiting ring and pressure regulating slide have grooves and bosses. When the APL valve is set to the zero position, the boss enters the groove, changing the free extension height of the pressure regulating spring and bringing the pressure to zero, thus achieving rapid pressure relief. This also allows for the rapid release of excessive pressure in emergencies, improving patient safety. Simultaneously, the cooperation between the pressure regulating spring and the pressure regulating shaft improves the accuracy of pressure regulation, meeting the needs of high-precision medical equipment. Moreover, this pressure relief valve has a simple and reliable structure, is easy to operate and maintain, and is suitable for various medical equipment operating environments.

[0025] 2. The adjustable pressure limiting valve for an anesthesia machine with rapid pressure relief function described in this application, by setting a rapid positioning mechanism, allows the pressure limiting valve to be inserted into the mounting housing during installation, and the insertion ring on the mounting housing to be inserted into the annular insertion groove for insertion and fixation. During the insertion and fixation process, the insertion ring can compress the annular inflation bladder in the annular insertion groove, causing the air in the annular inflation bladder to enter the interior of the inflation bladder column through the inflation tube, causing the inflation bladder column to expand. When the locking pin aligns with the locking groove, the locking pin can be inserted into the locking groove under the action of the expanded inflation bladder column, achieving automatic locking of the insertion ring, thereby achieving the purpose of rapid installation and fixation of the pressure limiting valve. Moreover, some of the air entering the inflation bladder column can enter the sealing bladder ring through the connecting pipe, causing the sealing bladder ring to expand and press against the surface of the mounting housing, achieving effective sealing of the gap between the base fixing ring and the mounting housing. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application; Figure 2 This is a front view structural diagram of Embodiment 1 of this application; Figure 3 This is a schematic diagram of the front section structure of Embodiment 1 of this application; Figure 4 This is a schematic diagram of the overall structure of Embodiment 2 of this application; Figure 5 This is a schematic diagram of the front section structure of Embodiment 2 of this application; Figure 6 This application Figure 5 Enlarged structural diagram at point A in the middle.

[0027] Explanation of reference numerals in the attached figures: 100. Valve body assembly; 101. Limiting base; 102. Base fixing ring; 103. Valve body limiting ring; 104. Ring-shaped handle; 105. Handle limiting ring; 106. Handle cover; 200. Valve core assembly; 201. Pressure regulating ring; 202. Pressure regulating spring limit ring; 203. Pressure regulating shaft; 204. Pressure regulating spring; 205. Pressure regulating sleeve; 206. Pressure regulating slide; 207. Quick pressure relief shaft; 208. Zero position spring; 209. Spring washer; 2010. Spring limit seat; 2011. Lifting spring; 2012. Quick pressure relief limit sleeve; 2013. Ball bearing fixing plate; 2014. Ball bearing shaft; 2015. Ball bearing spring; 2016. Quick release shaft fixing plate; 300. Valve port assembly; 301. Support frame; 302. Annular valve port; 303. Valve port diaphragm; 304. Valve body slide bar; 400. Quick positioning mechanism; 401. Insertion ring; 402. Annular insertion groove; 403. Annular inflatable airbag; 404. Cylindrical cavity; 405. Inflatable airbag column; 406. Locking column; 407. Locking groove; 408. Inflation tube; 409. Pressure relief tube; 4010. Suction tube; 4011. Suction one-way valve; 4012. First return spring; 4013. Second return spring; 4014. Sealing airbag ring; 4015. Connecting tube; 500. Install the outer casing. Detailed Implementation

[0028] The following combination Figures 1 to 6 This application will be described in further detail.

[0029] Example 1 Please refer to Figures 1 to 3An adjustable pressure limiting valve for an anesthesia machine with a rapid pressure relief function includes a valve body assembly 100, a valve core assembly 200, and a valve port assembly 300. The valve body assembly 100 includes a limiting base 101 and a base fixing ring 102 disposed on the outer annular surface of the limiting base 101. A valve body limiting ring 103 is disposed between the limiting base 101 and the base fixing ring 102. The valve body assembly 100 also includes an annular handle 104 disposed on the upper surface of the base fixing ring 102. The valve core assembly 200 is disposed inside the valve body assembly 100 and includes a pressure adjusting ring 201, a pressure adjusting spring limiting ring 202, a pressure adjusting shaft 203, a pressure adjusting spring 204, a pressure adjusting sleeve 205, a pressure adjusting slide 206, and a rapid pressure relief valve. The pressure relief shaft 207 and pressure regulating ring 201 are installed through the bottom of the limiting base 101. The pressure regulating sleeve 205 is installed inside the valve body limiting ring 103, and the pressure regulating slide 206 is installed inside the pressure regulating sleeve 205. The pressure regulating shaft 203 is installed inside the pressure regulating slide 206. The quick pressure relief shaft 207 is installed inside the pressure regulating shaft 203 and passes through the pressure regulating shaft 203. The pressure regulating spring 204 is sleeved on the outer surface of the quick pressure relief shaft 207 and is located between the pressure regulating shaft 203 and the pressure regulating ring 201. The pressure regulating spring limiting ring 202 is located at the top of the pressure regulating ring 201. The valve port assembly 300 is located below the valve body assembly 100.

[0030] Please refer to Figure 2 , Figure 3 A handle limiting ring 105 is provided on the outer ring surface of the valve body limiting ring 103, and a handle cover 106 is provided on the top of the annular handle 104.

[0031] Specifically, the valve body assembly 100 defines the APL valve scale position by the base fixing ring 102, and the annular handle 104 and the handle limiting ring 105 are fastened with screws to prevent them from loosening.

[0032] Please refer to Figure 2 , Figure 3 The pressure regulating sleeve 205 is provided with a zero-position return spring 208 located on the outer surface of the pressure regulating slide 206, and a spring washer 209 is provided at the bottom of the zero-position return spring 208.

[0033] Specifically, the APL valve body limiting ring 103 and the pressure regulating slide 206 are provided with a groove and a boss. When the APL valve is set to the zero position, the boss enters the groove, changing the free extension height of the pressure regulating spring 204, so that the pressure returns to zero.

[0034] Please refer to Figure 2 , Figure 3A spring limit seat 2010 is provided on the outer surface of the top end of the pressure regulating sleeve 205, and an upward spring 2011 is sleeved on the outer surface of the pressure regulating sleeve 205 at the bottom end of the spring limit seat 2010.

[0035] Specifically, the quick-release shaft 207 is lifted by raising the ring handle 104, and the quick-release shaft 207 is lifted to disengage from the pressure regulating ring 201 to achieve quick pressure relief.

[0036] Please refer to Figure 2 , Figure 3 The valve body limiting ring 103 is provided with a quick pressure relief limiting sleeve 2012 at its top end, and a ball fixing plate 2013 is provided at its top end. A ball shaft 2014 is provided on the upper surface of the ball fixing plate 2013, and a ball spring 2015 is sleeved on the outer surface of the ball shaft 2014.

[0037] Please refer to Figure 2 , Figure 3 The pressure regulating sleeve 205 is provided with a quick discharge shaft fixing plate 2016 at its top, and the quick pressure relief shaft 207 is located below the quick discharge shaft fixing plate 2016.

[0038] Specifically, it facilitates quick and easy fixation and positioning of the pressure shaft 207.

[0039] Please refer to Figure 2 , Figure 3 The valve port assembly 300 includes a support frame 301 disposed below the limiting base 101, and an annular valve port 302 disposed at the bottom of the support frame 301. A valve port diaphragm 303 is disposed inside the annular valve port 302. A valve body slide rod 304 is disposed at the bottom end of the pressure regulating ring 201, and the bottom end of the valve body slide rod 304 passes through the annular valve port 302.

[0040] In this embodiment, a valve body assembly 100 and a valve core assembly 200 are provided. The valve body assembly 100 defines the APL valve scale position via a base fixing ring 102. The annular handle 104 and the handle limiting ring 105 are secured with screws to prevent loosening. Simultaneously, the pressure regulating shaft 203 has a groove for easy rotation. Rotating the pressure regulating shaft 203 adjusts the distance of the quick-release shaft 207, thereby adjusting the compression ratio of the pressure regulating spring 204 and achieving precise adjustment of the APL valve. Furthermore, the quick-release shaft 207 is lifted by raising the annular handle 104, causing it to disengage from the pressure regulating ring 201 and achieve rapid pressure release. After pressure release, the annular handle 104 is released. 04. The quick-release shaft 207 maintains the original pressure contact with the pressure regulating ring 201. Furthermore, the APL valve body limiting ring 103 and the pressure regulating slide 206 are provided with grooves and bosses. When the APL valve is set to the zero position, the boss enters the groove, changing the free extension height of the pressure regulating spring 204, thus bringing the pressure to zero and achieving the quick-release function. It can also rapidly release excessive pressure in emergencies, improving patient safety. Simultaneously, the cooperation between the pressure regulating spring 204 and the pressure regulating shaft 203 improves the accuracy of pressure regulation, meeting the needs of high-precision medical equipment. Moreover, this pressure-limiting valve has a simple and reliable structure, is easy to operate and maintain, and is suitable for various medical equipment operating environments.

[0041] Example 2 Based on Example 1, referring to Figures 4 to 6 And unlike Example 1, Please refer to Figure 5 , Figure 6 The bottom of the base fixing ring 102 is provided with a quick positioning mechanism 400, which is used to quickly fix the adjustable pressure limiting valve of the anesthesia machine onto the mounting housing 500 at a designated position. The quick positioning mechanism 400 includes a plug ring 401 fixed on the surface of the mounting housing 500, and an annular plug groove 402 opened on the lower surface of the base fixing ring 102 and adapted to the plug ring 401.

[0042] Specifically, this facilitates the insertion and fixing of the pressure relief valve onto the surface of the mounting housing 500 via the plug-in ring 401.

[0043] Please refer to Figure 5 , Figure 6An annular inflatable airbag 403 is fixedly mounted on the inner top wall of the annular insertion groove 402, and several cylindrical cavities 404 are arranged in a circular array on the inner side wall of the annular insertion groove 402. An inflatable airbag column 405 is fixedly mounted on the inner wall of the cylindrical cavity 404, and a locking column 406 that is slidably connected to the inner wall of the cylindrical cavity 404 is fixedly mounted at the end of the inflatable airbag column 405. A locking groove 407 that is adapted to the locking column 406 is opened on the inner annular surface of the insertion ring 401. An inflation tube 408 extending into the interior of the annular inflatable airbag 403 is provided at the end of the inflatable airbag column 405. The end of 5 is also provided with a pressure relief pipe 409 extending to the outer surface of the base fixing ring 102, and the end of the pressure relief pipe 409 is provided with a pressure relief valve. The end of the annular inflatable airbag 403 is provided with an air intake pipe 4010 extending to the outer surface of the base fixing ring 102. The surface of the air intake pipe 4010 is provided with an air intake one-way valve 4011, and the end of the air intake pipe 4010 is provided with a filter cover. The inner wall of the annular inflatable airbag 403 is fixed with a plurality of first return springs 4012 in a circumferential array, and the inner wall of the inflatable airbag column 405 is fixed with a second return spring 4013.

[0044] Specifically, the compression of the annular inflatable airbag 403 by the insertion ring 401 enables the locking pin 406 to automatically insert into the locking groove 407, thereby effectively locking and fixing the insertion ring 401. At the same time, during disassembly, it is only necessary to open the pressure relief valve, so that the air in the inflatable airbag pin 405 can be discharged through the pressure relief pipe 409 under the action of the second return spring 4013, which drives the locking pin 406 to disengage from the locking groove 407, achieving the purpose of quick disassembly. Moreover, after the base fixing ring 102 is separated from the mounting shell 500, the annular inflatable airbag 403 can be drawn into the interior of the annular inflatable airbag 403 through the suction pipe 4010 under the action of the first return spring 4012, achieving the automatic reset of the annular inflatable airbag 403.

[0045] Please refer to Figure 5 , Figure 6 The lower surface of the base fixing ring 102 is provided with an annular sealing groove. The inner wall of the annular sealing groove is fixed with a sealing airbag ring 4014. After the sealing airbag ring 4014 expands, it abuts against the outer surface of the mounting shell 500. The end of the inflatable airbag column 405 is provided with a connecting pipe 4015 extending into the interior of the sealing airbag ring 4014.

[0046] Specifically, it can achieve automatic and effective sealing of the gap between the base fixing ring 102 and the mounting housing 500.

[0047] In this embodiment, by providing a quick positioning mechanism 400, the pressure relief valve can be inserted into the mounting housing 500 during installation, and the insertion ring 401 on the mounting housing 500 can be inserted into the annular insertion groove 402 to achieve insertion and fixation. During the insertion and fixation process, the insertion ring 401 can compress the annular inflatable airbag 403 in the annular insertion groove 402, causing the air in the annular inflatable airbag 403 to enter the interior of the inflatable airbag column 405 through the inflation tube 408, causing the inflatable airbag column 405 to inflate. When the locking column 405 is engaged... After the locking pin 406 aligns with the locking groove 407, the locking pin 406 can be inserted into the locking groove 407 under the action of the expanded airbag pin 405, thereby automatically locking the plug ring 401 and achieving the purpose of quickly installing and fixing the pressure relief valve. Moreover, some of the air entering the expanded airbag pin 405 can enter the sealing airbag ring 4014 through the connecting pipe 4015, causing the sealing airbag ring 4014 to expand and press against the surface of the mounting housing 500, thereby effectively sealing the gap between the base fixing ring 102 and the mounting housing 500.

Claims

1. An adjustable pressure relief valve for an anesthetizing machine having a rapid pressure relief function, characterized in that, The valve body assembly (100), the valve core assembly (200) and the valve port assembly (300) are included. The valve body assembly (100) includes a limiting base (101) and a base fixing ring (102) arranged on the outer ring surface of the limiting base (101), the middle of the limiting base (101) and the base fixing ring (102) is provided with a valve body limiting ring (103), and the valve body assembly (100) further includes a ring handle (104) arranged on the upper surface of the base fixing ring (102). The valve core assembly (200) is arranged in the inside of the valve body assembly (100), the valve core assembly (200) includes a pressure regulating ring (201), a pressure regulating spring limiting ring (202), a pressure regulating shaft (203), a pressure regulating spring (204), a pressure regulating sleeve (205), a pressure regulating sliding cylinder (206) and a quick pressure relief shaft (207), the pressure regulating ring (201) is arranged through the bottom of the limiting base (101), the pressure regulating sleeve (205) is arranged in the inside of the valve body limiting ring (103), the pressure regulating sliding cylinder (206) is arranged in the inside of the pressure regulating sleeve (205), the pressure regulating shaft (203) is arranged in the inside of the pressure regulating sliding cylinder (206), the quick pressure relief shaft (207) is arranged in the inside of the pressure regulating shaft (203) and penetrates the pressure regulating shaft (203), the pressure regulating spring (204) is sleeved on the outer surface of the quick pressure relief shaft (207), and the pressure regulating spring (204) is arranged between the pressure regulating shaft (203) and the pressure regulating ring (201), and the pressure regulating spring limiting ring (202) is arranged on the top of the pressure regulating ring (201). The valve port assembly (300) is arranged below the valve body assembly (100).

2. The adjustable pressure limiting valve with fast pressure relief function for an anesthesia machine according to claim 1, characterized in that, The outer ring surface of the valve body limiting ring (103) is provided with a handle limiting ring (105), and the top of the ring handle (104) is provided with a handle cover sheet (106).

3. The adjustable pressure limiting valve with fast pressure relief function for an anesthesia machine according to claim 2, characterized in that, The inside of the pressure regulating sleeve (205) is provided with a zero reset spring (208) on the outer surface of the pressure regulating sliding cylinder (206), and the bottom of the zero reset spring (208) is provided with a spring washer (209).

4. The adjustable pressure limiting valve with fast pressure relief function for an anesthesia machine according to claim 3, characterized in that, The top end of the pressure regulating sleeve (205) is provided with a spring limiting seat (2010), and the outer surface of the pressure regulating sleeve (205) is sleeved with a lifting spring (2011) at the bottom end of the spring limiting seat (2010).

5. The adjustable pressure limiting valve with fast pressure relief function for an anesthesia machine according to claim 4, wherein, The top end of the valve body limiting ring (103) is provided with a quick pressure relief limiting sleeve (2012), the top end of the quick pressure relief limiting sleeve (2012) is provided with a marble fixing plate (2013), the upper surface of the marble fixing plate (2013) is provided with a marble shaft (2014), and the outer surface of the marble shaft (2014) is sleeved with a marble spring (2015).

6. The adjustable pressure limiting valve with fast pressure relief function for an anesthesia machine according to claim 5, wherein, The top of the pressure regulating sleeve (205) is provided with a quick discharge shaft fixing plate (2016), and the quick pressure relief shaft (207) is arranged below the quick discharge shaft fixing plate (2016).

7. The adjustable pressure-limiting valve with a fast pressure relief function for an anesthesia machine according to claim 1, characterized in that, The valve port assembly (300) comprises a support frame (301) arranged below the limiting base (101), and a ring-shaped valve port (302) arranged at the bottom of the support frame (301), wherein the inside of the ring-shaped valve port (302) is provided with a valve port diaphragm (303), the bottom end of the pressure regulating ring (201) is provided with a valve body slide rod (304), and the bottom end of the valve body slide rod (304) penetrates through the ring-shaped valve port (302).

8. The adjustable pressure limiting valve with fast pressure relief function for an anesthesia machine according to claim 1, wherein, The bottom of the base fixing ring (102) is provided with a quick positioning mechanism (400) for quickly fixing the adjustable pressure limiting valve of the anesthesia machine on the mounting shell (500) at a specified position, and the quick positioning mechanism (400) comprises a plug-in ring (401) fixed on the surface of the mounting shell (500), and a ring-shaped plug-in groove (402) formed in the lower surface of the base fixing ring (102) and matched with the plug-in ring (401).

9. The adjustable pressure-limiting valve with a fast pressure relief function for an anesthesia machine according to claim 8, characterized in that The inner top wall of the ring-shaped plug-in groove (402) is fixed with a ring-shaped inflation air bag (403), and the inner side wall of the ring-shaped plug-in groove (402) is circumferentially provided with a plurality of cylindrical cavities (404), the inner wall of the cylindrical cavity (404) is fixed with an inflation air bag column (405), the end of the inflation air bag column (405) is fixed with a locking column (406) in sliding connection with the inner wall of the cylindrical cavity (404), the inner ring surface of the plug-in ring (401) is provided with a locking groove (407) matched with the locking column (406), the end of the inflation air bag column (405) is provided with an inflation pipe (408) extending into the inside of the ring-shaped inflation air bag (403), the end of the inflation air bag column (405) is also provided with a pressure relief pipe (409) extending to the outer surface of the base fixing ring (102), and the end of the pressure relief pipe (409) is provided with a pressure relief valve, the end of the ring-shaped inflation air bag (403) is provided with an air suction pipe (4010) extending to the outer surface of the base fixing ring (102), the surface of the air suction pipe (4010) is provided with an air suction one-way valve (4011), and the end of the air suction pipe (4010) is provided with a filter cover, the inner wall of the ring-shaped inflation air bag (403) is circumferentially provided with a plurality of first reset springs (4012), and the inner wall of the inflation air bag column (405) is fixed with a second reset spring (4013).

10. The adjustable pressure-limiting valve with a fast pressure relief function for an anesthesia machine according to claim 9, characterized in that, The lower surface of the base fixing ring (102) is provided with a ring-shaped sealing groove, the inner wall of the ring-shaped sealing groove is fixed with a sealing air bag ring (4014), and the sealing air bag ring (4014) is in abutment with the outer surface of the mounting shell (500) after expansion, and the end of the inflation air bag column (405) is provided with a communication pipe (4015) extending into the inside of the sealing air bag ring (4014).

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