Adjustable pressure limiting valve

Abstract

The utility model discloses an adjustable pressure-limiting valve, which relates to the technical field of medical instruments and comprises a valve cover and an air inlet sleeve, the top of the air inlet sleeve is in threaded connection with a deflation sleeve, an outer wall pipeline of the deflation sleeve is sleeved with an exhaust sleeve, and the top of the deflation sleeve is fixedly connected with a valve core sleeve through a sunk screw. An ejector pin is placed at the top of the air inlet sleeve, the other end of the ejector pin penetrates through and extends to the other side of the valve element sleeve, a valve element ejector rod is placed at the other end of the ejector pin, the outer wall of the valve element ejector rod is sleeved with a first spring, and the other end of the valve element ejector rod is slidably sleeved with a valve element screw. According to the adjustable pressure limiting valve, it can be guaranteed that a patient can obtain appropriate ventilation during an operation, airway pressure is limited, air pressure damage is prevented, medical professionals can conveniently and better control the performance of an anesthesia machine, and smooth operation is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to an adjustable pressure-limiting valve. Background Art

[0002] APL valve, full name adjustable pressure limiting valve, is a commonly used valve in the field of anesthesia machines. It is a small valve on medical equipment. When the patient is operated on, the pressure in the breathing circuit is adjusted through the APL valve to ensure that the patient is properly ventilated and protected during the operation. It is mainly used for gas pressure control of the manual drive gas branch of the anesthesia machine. However, most of the anesthesia machines on the anesthesia machines cannot be accurately controlled and the appropriate pressure can be selected. Summary of the invention

[0003] The utility model aims to solve the shortcomings in the prior art and proposes an adjustable pressure-limiting valve.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] 14. The illustrative embodiment of the present invention relates to a valve cover as set forth in claim 13, wherein the illuminating element is provided on the spool and the spool is provided with a plurality of spools of different diameters. The illuminating element is provided on the spool and the spool is provided with a plurality of spools of different diameters. The illuminating element is provided on the spool and the spool is provided with a plurality of spools of different diameters.

[0006] Preferably, the bottom and top outer walls of the exhaust sleeve are fixedly connected with sealing rings, the sealing ring at the top of the exhaust sleeve contacts the outer wall of the valve core sleeve, the sealing ring at the bottom of the exhaust sleeve contacts the outer wall of the intake sleeve, the bottom of the valve core sleeve is fixedly connected with a sealing ring, and the sealing ring at the bottom of the valve core sleeve contacts the top outer wall of the exhaust sleeve.

[0007] Preferably, the outer side wall of the valve core sleeve is provided with three evenly distributed countersunk holes, and the valve core sleeve is fixedly connected to the valve core sleeve at the countersunk holes by screws.

[0008] Preferably, the exhaust end of the exhaust sleeve is threadedly connected with a copper head.

[0009] Preferably, the inner wall of the valve cover is fixedly connected to a limit block, the outer wall of the valve core sleeve is sleeved with a valve pin, and the valve pin and the limit block correspond to each other.

[0010] Preferably, a gasket is sleeved inside the valve cover, a plurality of equidistantly arranged through holes are opened on the outer wall of the gasket, the limit block is located at the gasket, a second spring is sleeved at the bottom of the valve pin, and the through holes at the valve pin and the gasket correspond to each other.

[0011] The beneficial effects of the utility model are:

[0012] 1. In the utility model, the adjustable pressure-limiting valve is arranged in the breathing circuit, and the height of the first spring can be adjusted by rotating the valve cover to further set the pressure in the breathing circuit. When the pressure in the breathing circuit is higher than the set pressure, the gas pushes up the ejector pin through the air inlet sleeve and enters the air release sleeve, and is released into the exhaust sleeve from the circular holes around the air release sleeve, and is drained through the exhaust sleeve. When the exhaust gas is introduced through the copper head external pipe and the discharge pressure is not higher than the set pressure, due to the elastic force of the first spring, the ejector pin is tightly pressed against the exhaust port on the top of the air inlet sleeve through the valve core ejector rod, and no air is leaked.

[0013] 2. In the utility model, through the design of the valve pin, gasket and the second spring, the valve pin will be inserted into the through hole in the gasket. When the valve cover rotates, the valve cover will drive the gasket to rotate. At this time, the gasket will squeeze the valve pin and the second spring. The valve pin moves downward and then moves upward to be reinserted into the through hole, thereby forming a sense of frustration, which can prevent the valve cover from rotating excessively and facilitate accurate control of the pressure value of the pressure-limiting valve.

[0014] In short, the adjustable pressure-limiting valve can ensure that patients receive appropriate ventilation during surgery, limit airway pressure, prevent barotrauma, and enable medical professionals to better control the performance of the anesthesia machine to ensure the smooth progress of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a structural schematic diagram of an adjustable pressure-limiting valve.

[0016] Figure 2 This is a front view of an adjustable pressure-limiting valve of the utility model.

[0017] Figure 3 The utility model is an adjustable pressure limiting valve Figure 2 Cross-sectional view at AA in the middle.

[0018] Figure 4 The utility model is an exploded view of an adjustable pressure-limiting valve.

[0019] Figure 5The utility model is a structural schematic diagram of a valve cover, a gasket and a limit block of an adjustable pressure limiting valve.

[0020] Numbers in the figure: 1. Valve cover; 2. Valve core sleeve; 3. Exhaust sleeve; 4. Copper head; 5. Valve core screw; 6. Gasket; 7. Valve core; 8. Valve core outer sleeve; 9. Valve core push rod; 10. First spring; 11. Vent sleeve; 12. Ejector pin; 13. Inlet sleeve; 14. Valve pin; 15. Limit block; 16. Second spring. Implementation

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Example

[0022] As attached Figure 1 To Attachment Figure 5 As shown:

[0023] A kind of adjustable pressure limiting valve comprises a valve cover 1 and an air inlet sleeve 13. The top of the air inlet sleeve 13 is threadedly connected with a vent sleeve 11. The outer wall of the vent sleeve 11 is provided with a vent hole. The outer wall pipeline of the vent sleeve 11 is sleeved with an exhaust sleeve 3. The top of the vent sleeve 11 is fixedly connected with a valve core sleeve 2 by a countersunk screw. A ejector pin 12 is placed on the top of the air inlet sleeve 13. The other end of the ejector pin 12 penetrates and extends to the other side of the valve core sleeve 2. A valve core push rod 9 is placed on the other end of the ejector pin 12. The outer wall of the valve core push rod 9 is sleeved with a first spring 10. The other end of the valve core push rod 9 is slidably sleeved with a valve core screw 5. The other end of the valve core screw 5 is fixedly connected to the valve cover 1. The inside of the valve cover 1 is fixedly connected with a valve core 7. The valve core 7 is sleeved on the outside of the valve core screw 5. The bottom end of the valve core 7 is inserted into the valve core sleeve 2. The outer wall of the valve core 7 is provided with an external thread. The valve core 7 is threadedly connected with a valve core jacket 8 through the external thread. The valve core jacket 8 is fixedly sleeved with the valve core sleeve 2.

[0024] As attached Figure 3 To Attachment Figure 4 As shown, the bottom and top outer walls of the exhaust sleeve 3 are fixedly sleeved with sealing rings, the sealing ring at the top of the exhaust sleeve 3 contacts the outer wall of the valve core sleeve 2, the sealing ring at the bottom of the exhaust sleeve 3 contacts the outer wall of the intake sleeve 13, the bottom of the valve core sleeve 2 is fixedly sleeved with a sealing ring, and the sealing ring at the bottom of the valve core sleeve 2 contacts the top outer wall of the exhaust sleeve 11.

[0025] In the above technical solution, the design of the sealing ring improves the airtightness of the valve and prevents gas leakage.

[0026] The outer wall of the valve core sleeve 8 is provided with three evenly distributed countersunk holes, and the valve core sleeve 8 is fixedly connected to the valve core sleeve 2 by screws at the countersunk holes.

[0027] As attached Figure 1 As shown, the exhaust end of the exhaust sleeve 3 is threadedly connected with a copper head 4.

[0028] In the above technical solution, the copper head 4 is used to connect to an external pipeline, so that the gas in the valve body is discharged through the pipeline.

[0029] As attached Figure 3 To Attachment Figure 5 As shown, the inner wall of the valve cover 1 is fixedly connected with a limit block 15, and the outer wall of the valve core sleeve 8 is sleeved with a valve pin 14, and the valve pin 14 and the limit block 15 correspond to each other.

[0030] In the above technical solution, when the valve cover 1 rotates, the valve cover 1 will drive the limit block 15 to rotate, and the valve pin 14 can limit and block the valve cover 1 through the limit block 15 to prevent the valve cover 1 from rotating excessively.

[0031] As attached Figure 3 To Attachment Figure 5 As shown, a gasket 6 is sleeved inside the valve cover 1, and a plurality of equally spaced through holes are formed on the outer wall of the gasket 6. A limit block 15 is located at the gasket 6, and a second spring 16 is sleeved at the bottom of the valve pin 14. The through holes at the valve pin 14 and the gasket 6 correspond to each other.

[0032] In the above technical solution, the valve pin 14 will be inserted into the through hole in the gasket 6. When the valve cover 1 rotates, the valve cover 1 will drive the gasket 6 to rotate. At this time, the gasket 6 will squeeze the valve pin 14 and the second spring 16. The valve pin 14 moves downward and then moves upward to be reinserted into the through hole, thereby forming a sense of frustration, which is convenient for controlling and adjusting the pressure of the pressure-limiting valve.

[0033] The specific usage and function of this embodiment are as follows:

[0034] When the utility model is used, the entire adjustable pressure-limiting valve is fixedly installed on the outside of the regulating valve, the bottom of the air inlet sleeve 13 is the air inlet port, and the copper head 4 is externally connected to a pipeline, so that the gas in the valve body is discharged through the pipeline. When performing surgery, the valve cover 1 is rotated to drive the valve core 7 to rotate. Since the valve core 7 and the valve core sleeve 8 are threadedly connected, the valve core 7 and the valve core screw 5 move up or down at this time. Since the bottom of the valve core screw 5 squeezes the first spring 10 in the valve core 7, the height of the first spring 10 can be adjusted by controlling the position of the valve core screw 5, thereby setting the pressure in the limiting breathing circuit;

[0035] When the pressure in the breathing circuit is higher than the set pressure, the gas pushes up the ejector pin 12 through the inlet sleeve 13 and enters the exhaust sleeve 11, and is released from the circular holes around the exhaust sleeve 11 into the exhaust sleeve 3, and is drained through the exhaust sleeve 3, and is introduced into the exhaust gas through the external pipe of the copper head 4 for discharge;

[0036] When the pressure is not higher than the set pressure, due to the elastic force of the first spring 10, the ejector pin 12 is tightly pressed against the exhaust port at the top of the air inlet sleeve 13 through the valve core ejector rod 9, and no air is leaked.

[0037] For the above structure and process, please refer to Figure 1-5 .

[0038] The above are only preferred specific implementation methods of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, who makes equivalent replacements or changes based on the technical scheme and utility model concept of the utility model, should be covered by the protection scope of the utility model.

Claims

1. An adjustable pressure-limiting valve, comprising a valve cover (1) and an air inlet sleeve (13), characterized in that: The top of the air inlet sleeve (13) is threadedly connected to the air discharge sleeve (11), the outer wall pipe of the air discharge sleeve (11) is sleeved with the exhaust sleeve (3), the top of the air discharge sleeve (11) is fixedly connected to the valve core sleeve (2) via a countersunk screw, a ejector pin (12) is placed on the top of the air inlet sleeve (13), the other end of the ejector pin (12) penetrates and extends to the other side of the valve core sleeve (2), a valve core ejector rod (9) is placed on the other end of the ejector pin (12), and the outer wall of the valve core ejector rod (9) is sleeved with a first spring (10) The other end of the valve core push rod (9) is slidably sleeved with a valve core screw (5), the other end of the valve core screw (5) is fixedly connected to the valve cover (1), the interior of the valve cover (1) is fixedly connected with a valve core (7), the valve core (7) is sleeved on the outside of the valve core screw (5), the bottom end of the valve core (7) is inserted into the valve core sleeve (2), the outer wall of the valve core (7) is provided with an external thread, the valve core (7) is threadedly connected to a valve core sleeve (8) via the external thread, and the valve core sleeve (8) is fixedly sleeved with the valve core sleeve (2).

2. An adjustable pressure limiting valve according to claim 1, characterized in that: The bottom and top outer walls of the exhaust sleeve (3) are both fixedly sleeved with sealing rings, the sealing ring at the top of the exhaust sleeve (3) contacts the outer wall of the valve core sleeve (2), the sealing ring at the bottom of the exhaust sleeve (3) contacts the outer wall of the intake sleeve (13), the bottom of the valve core sleeve (2) is fixedly sleeved with a sealing ring, and the sealing ring at the bottom of the valve core sleeve (2) contacts the top outer wall of the exhaust sleeve (11).

3. The adjustable pressure limiting valve according to claim 1, characterized in that: The outer wall of the valve core sleeve (8) is provided with three evenly distributed countersunk holes, and the valve core sleeve (8) is fixedly connected to the valve core sleeve (2) at the countersunk holes by means of screws.

4. The adjustable pressure limiting valve according to claim 1, characterized in that: The exhaust end of the exhaust sleeve (3) is threadedly connected with a copper head (4).

5. The adjustable pressure limiting valve according to claim 1, characterized in that: The inner wall of the valve cover (1) is fixedly connected to a limit block (15), the outer wall of the valve core sleeve (8) is sleeved with a valve pin (14), and the valve pin (14) and the limit block (15) correspond to each other.

6. The adjustable pressure limiting valve according to claim 5, characterized in that: A gasket (6) is sleeved inside the valve cover (1), a plurality of through holes arranged at equal intervals are formed on the outer wall of the gasket (6), the limit block (15) is located on the gasket (6), a second spring (16) is sleeved at the bottom of the valve pin (14), and the through holes on the valve pin (14) and the gasket (6) correspond to each other.

Images