Sequence valve and breathing machine

Abstract

The utility model belongs to the technical field of medical instruments, and particularly relates to a sequence valve and a breathing machine. The sequence valve comprises a sliding rod, a first elastic piece, a blocking block and a valve cylinder provided with an inner space. The valve cylinder is further provided with an adjusting opening, an air inlet and an air outlet which are all communicated with the inner space. The sliding rod and the blocking block are both installed in the inner space in a sliding mode. The first elastic piece is installed in the internal space and abuts against the blocking block. The sliding rod is provided with a first annular protruding part used for controlling connection and disconnection between the air inlet and the air outlet. Gas input into the internal space through the adjusting opening is used for driving the sliding rod to slide in the internal space through the blocking block, so that the first annular convex part controls connection and disconnection between the gas inlet and the gas outlet. The sequence valve is simple in structure, low in manufacturing cost and high in safety.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical equipment, and particularly relates to a sequence valve and a ventilator. Background Art

[0002] In clinical medicine, as an effective means of artificially replacing the spontaneous ventilation function, the ventilator has been widely used in respiratory failure caused by various reasons, anesthesia respiratory management during major surgery, respiratory support therapy, and emergency resuscitation. It occupies a very important position in the medical field. In addition, the ventilator is a vital medical device that can prevent and treat respiratory failure, reduce complications, and save and prolong the patient's life.

[0003] Since the patient breathes intermittently, the ventilator also needs to output gas to the patient intermittently; the sequence valve is an important component in the ventilator that controls the frequency of gas output by the ventilator.

[0004] In the prior art, the on-off frequency of the sequence valve is usually controlled electrically, but the electrically controlled sequence valve has problems such as high risk and high cost. In order to improve the safety of the ventilator, some manufacturers have also used pneumatically controlled sequence valves, but the existing pneumatically controlled sequence valves have problems such as complex structure and high cost. Summary of the invention

[0005] The utility model aims at the technical problems that the on-off valve in the prior art has a complex structure and occupies a large space, and provides a sequence valve and a ventilator.

[0006] In view of the above technical problems, an embodiment of the utility model provides a sequence valve, comprising a slide rod, a first elastic member, a blocking block, and a valve cylinder with an internal space, wherein the valve cylinder is further provided with a regulating port, an air inlet, and an air outlet all connected to the internal space;

[0007] The sliding rod and the blocking block are both slidably installed in the internal space; the first elastic member is installed in the internal space and abuts against the blocking block; the sliding rod is provided with a first annular convex portion for controlling the connection between the air inlet and the air outlet;

[0008] The gas input from the regulating port to the internal space is used to drive the sliding rod to slide in the internal space through the blocking block, so that the first annular protrusion controls the connection between the air inlet and the air outlet.

[0009] Optionally, the blocking block is provided with a groove, and the sliding rod is further provided with a second annular protrusion;

[0010] The sequence valve further includes a second elastic member installed in the groove, and one end of the second elastic member abuts against the second annular protrusion.

[0011] Optionally, the internal space includes a first inner hole and a second inner hole connected to the first inner hole, and the inner diameter of the first inner hole is smaller than the inner diameter of the second inner hole;

[0012] The air inlet and the air outlet are both connected to the first inner hole, and the regulating port is connected to the second inner hole; the blocking block is slidably installed in the second inner hole, the first annular protrusion is slidably inserted in the first inner hole, and the first elastic member is installed in the second inner hole.

[0013] Optionally, the regulating port and the air outlet are arranged at opposite ends of the valve cylinder, and the air inlet is arranged on a side wall of the valve cylinder.

[0014] Optionally, the sequence valve further comprises a first sealing ring and a second sealing ring installed in the first inner hole at intervals, the first sealing ring is located between the air outlet and the air inlet, and the second sealing ring is located between the air inlet and the second inner hole;

[0015] When the sliding rod drives the first annular protrusion to abut against the first sealing ring, the air inlet is not connected to the air outlet;

[0016] When the sliding rod drives the first annular protrusion to abut against the second sealing ring, the air inlet is connected to the air outlet.

[0017] Optionally, the sequence valve further comprises a third sealing ring sleeved on the blocking block, and the third sealing ring abuts against the inner wall of the second inner hole.

[0018] Optionally, the valve cylinder includes a first cylinder body and a second cylinder body mounted on the first cylinder body; the first inner hole, the air inlet and the air outlet are all arranged on the first cylinder body; the second inner hole and the regulating port are both arranged on the second cylinder body.

[0019] Optionally, the first cylinder includes an outer cylinder and an inner cylinder with a receiving space, the first inner hole and the air outlet are both arranged on the inner cylinder, and the air inlet is arranged on the outer cylinder;

[0020] The inner cylinder is installed in the accommodating space, and an annular space is formed between the outer wall of the inner cylinder and the inner wall of the outer cylinder;

[0021] The side wall of the inner cylinder is also provided with through holes distributed at annular intervals, and the air inlet is connected to the first inner hole through the annular space and the through holes.

[0022] Optionally, the sequence valve further includes a regulating joint plugged into the regulating port, an air inlet joint plugged into the air inlet, and an air outlet joint plugged into the air outlet.

[0023] Another embodiment of the utility model provides a breathing machine, comprising the above-mentioned sequence valve.

[0024] In the utility model, when the gas input from the regulating port drives the slide bar to move through the block until the first annular protrusion on the slide bar moves to between the air inlet and the air outlet, the channel between the air inlet and the air outlet is blocked by the first annular protrusion, so that the air inlet and the air outlet are in a disconnected state; and during the movement of the slide bar in the direction away from the regulating port, the slide bar will compress the first elastic member. When the gas output from the regulating port to the internal space is withdrawn, the rebound force of the first elastic member will drive the slide bar to move until the first annular protrusion moves to the rear end of the air inlet or the air outlet, at which time, the air inlet and the air outlet are in a conducting state. In summary, the purpose of adjusting the gas transmission frequency of the sequential valve is achieved by adjusting the frequency of the gas input to the regulating port; and the sequential valve has a simple structure, low manufacturing cost and high safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0026] Figure 1 It is a structural schematic diagram of a sequence valve provided by an embodiment of the utility model;

[0027] Figure 2 is a cross-sectional view of a sequence valve provided by an embodiment of the utility model;

[0028] Figure 3 It is a partial structural schematic diagram of a sequence valve provided in one embodiment of the utility model.

[0029] The reference numerals in the specification are as follows:

[0030] 1. Sliding rod; 11. First annular protrusion; 12. Second annular protrusion; 2. First elastic member; 3. Block; 4. Valve cylinder; 41. Internal space; 411. First inner hole; 412. Second inner hole; 42. Adjusting port; 43. Air inlet; 44. Air outlet; 45. First cylinder; 451. Outer cylinder; 452. Inner cylinder; 46. Second cylinder; 5. Second elastic member; 6. First sealing ring; 7. Second sealing ring; 8. Third sealing ring. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0032] It should be understood that the directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "front", "back", and "middle" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation of the present invention.

[0033] like Figures 1 to 3 As shown, a sequence valve provided by an embodiment of the utility model comprises a slide rod 1, a first elastic member 2, a blocking block 3 and a valve cylinder 4 having an internal space 41, wherein the valve cylinder 4 is further provided with a regulating port 42, an air inlet 43 and an air outlet 44 all connected to the internal space 41;

[0034] The sliding rod 1 and the blocking block 3 are both slidably installed in the internal space 41; the first elastic member 2 is installed in the internal space 41 and abuts against the blocking block 3; the sliding rod 1 is provided with a first annular protrusion 11 for controlling the on-off between the air inlet 43 and the air outlet 44; it can be understood that the blocking block 3 is arranged opposite to the regulating port 42, and the blocking block 3 can prevent the gas input from the air inlet 43 to the internal space 41 from leaking from the regulating port 42; the first elastic member 2 includes but is not limited to a spring, etc., and the first elastic member 2 abuts against one end of the blocking block 3 away from the regulating port 42.

[0035] The gas input from the regulating port 42 to the internal space 41 is used to drive the sliding rod 1 to slide in the internal space 41 through the blocking block 3 , so that the first annular protrusion 11 controls the connection between the air inlet 43 and the air outlet 44 .

[0036] Specifically, when the gas input from the regulating port 42 drives the slide bar 1 to move through the block 3 until the first annular protrusion 11 on the slide bar 1 moves to between the air inlet 43 and the air outlet 44, the channel between the air inlet 43 and the air outlet 44 is blocked by the first annular protrusion 11, so that the air inlet 43 and the air outlet 44 are in a disconnected state; and during the movement of the slide bar 1 in the direction away from the regulating port 42, the slide bar 1 will compress the first elastic member 2. When the gas output from the regulating port 2 to the internal space 41 is withdrawn, the rebound force of the first elastic member 2 will drive the slide bar 1 to move until the first annular protrusion 11 moves to the rear end of the air inlet 43 or the air outlet 44, at which time, the air inlet 43 and the air outlet 44 are in a conducting state. In summary, the purpose of adjusting the gas transmission frequency of the sequence valve is achieved by adjusting the frequency of the gas input to the regulating port 42; and the sequence valve has a simple structure, low manufacturing cost and high safety.

[0037] In one embodiment, if Figures 1 to 3 As shown, the block 3 is provided with a groove, and the slide rod 1 is also provided with a second annular protrusion 12; it can be understood that the groove is arranged at the end of the block 3 away from the regulating port 42; when the air inlet 43 and the air outlet 44 are in a non-conducting state, the second annular protrusion 12 can play the role of covering the groove.

[0038] The sequence valve further comprises a second elastic member 5 installed in the groove, and one end of the second elastic member 5 abuts against the second annular protrusion 12. It can be understood that the second elastic member 5 includes but is not limited to a spring and the like.

[0039] Specifically, the gas input from the regulating port 42 first drives the block 3 forward, and the block 3 first compresses the second elastic member 5 and then drives the slide bar 1 forward, thereby avoiding the problems of rigid movement, collision with the inner wall, etc. caused by the gas input from the regulating port 42 directly driving the slide bar 1 to move; when the regulating port 42 withdraws the gas, the first elastic member 2 drives the slide bar 1 and the block 3 to move backward, and the compressed second elastic member 5 has a rebound force on the slide bar 1 to move forward, thereby ensuring the stability of the slide bar 1 so that the air inlet 43 and the air outlet 44 are in a conductive state. In this embodiment, the design of the second elastic member 5 ensures the stability of the movement of the slide bar 1 and the block 3 in the internal space 41.

[0040] In one embodiment, if Figure 1 and Figure 2As shown, the internal space 41 includes a first inner hole 411 and a second inner hole 412 connected to the first inner hole 411, and the inner diameter of the first inner hole 411 is smaller than the inner diameter of the second inner hole 412; it can be understood that the first inner hole 411 and the second inner hole 412 are coaxially arranged, and the outer diameter of the first annular protrusion 11 is smaller than or equal to the inner diameter of the first inner hole 411.

[0041] The air inlet 43 and the air outlet 44 are both connected to the first inner hole 411, and the regulating port 42 is connected to the second inner hole 412; the blocking block 3 is slidably installed in the second inner hole 412, the first annular protrusion 11 is slidably inserted in the first inner hole 411, and the first elastic member 2 is installed in the second inner hole 412. It can be understood that when the first annular protrusion 11 moves to the first inner hole 411 between the air inlet 43 and the air outlet 44, the air inlet 43 is not connected to the air outlet 44; when the first annular protrusion 11 moves to the first inner hole 411 at the rear end of the air inlet 43, the air inlet 43 is connected to the air outlet 44 through the first inner hole 411. In this embodiment, the sequential valve has a simple structure and low manufacturing cost.

[0042] In one embodiment, if Figure 1 and Figure 2 As shown, the regulating port 42 and the air outlet 44 are arranged at opposite ends of the valve cylinder 4, and the air inlet 43 is arranged on the side wall of the valve cylinder 4. It can be understood that the regulating port 42 is connected to the end of the second inner hole 412 away from the first inner hole 411, the air outlet 44 is connected to the end of the first inner hole 411 away from the second inner hole 412, and the air inlet 43 is connected to the first inner hole 411 from the side. In this embodiment, the sequential valve has a simple structure and low manufacturing cost.

[0043] In one embodiment, if Figure 2 As shown, the sequence valve further includes a first sealing ring 6 and a second sealing ring 7 installed in the first inner hole 411 at intervals, the first sealing ring 6 is located between the gas outlet 44 and the gas inlet 43, and the second sealing ring 7 is located between the gas inlet 43 and the second inner hole 412; it can be understood that the inner diameter of the inner hole of the first sealing ring 6 and the inner diameter of the inner hole of the second sealing ring 7 are both smaller than the outer diameter of the first annular protrusion 11. Preferably, a first annular groove and a second annular groove are provided on the inner wall of the first inner hole 411 at intervals, the first sealing ring 6 is installed in the first annular groove, and the second sealing ring 7 is installed in the second annular groove; the gas inlet 43 is located between the first annular groove and the second annular groove.

[0044] When the sliding rod 1 drives the first annular protrusion 11 to abut against the first sealing ring 6, the air inlet 43 is not connected to the air outlet 44; specifically, the gas input from the regulating port 42 drives the sliding rod 1 to move forward until the first annular protrusion 11 abuts against the first sealing ring 6; at this time, the first annular protrusion 11 abutting against the first sealing ring 6 can play a role in blocking the air inlet 43 and the air outlet 44.

[0045] When the slide bar 1 drives the first annular protrusion 11 to abut against the second sealing ring 7, the air inlet 43 is connected to the air outlet 44. Specifically, the rebound force of the first elastic member 2 drives the slide bar 1 to move backward until the first annular protrusion 11 abuts against the second sealing ring 7; at this time, the air inlet 43 is connected to the air outlet 44 through the first inner hole 411, and the first annular protrusion 11 abutting against the second sealing ring 7 can play a role in blocking the first inner hole 411 and the second inner hole 412. In this embodiment, the design of the first sealing ring 6 and the second sealing ring 7 ensures the sealing performance of the sequence valve.

[0046] In one embodiment, if Figure 2 As shown, the sequence valve further includes a third sealing ring 8 sleeved on the block 3, and the third sealing ring 8 abuts against the inner wall of the second inner hole 412. Preferably, a third annular groove is provided on the outer wall of the block 3, and the third sealing ring 8 is installed in the third annular groove. In this embodiment, the design of the third sealing ring 8 ensures the sealing of the block 3 sliding in the second inner hole 412, and prevents the gas input from the regulating port 42 from entering the second inner hole 412.

[0047] In one embodiment, if Figure 1 and Figure 2 As shown, the valve cylinder 4 includes a first cylinder body 45 and a second cylinder body 46 mounted on the first cylinder body 45; the first inner hole 411, the air inlet 43 and the air outlet 44 are all arranged on the first cylinder body 45; the second inner hole 412 and the regulating port 42 are all arranged on the second cylinder body 46. It can be understood that the first cylinder body 45 and the second cylinder body 46 can be connected by a threaded structure, and the first cylinder body 45 and the second cylinder body 46 are detachably connected, so as to facilitate the disassembly and assembly of the sequence valve.

[0048] In one embodiment, if Figure 2As shown, the first cylinder 45 includes an outer cylinder 451 and an inner cylinder 452 with a accommodating space, the first inner hole 411 and the air outlet 44 are both arranged on the inner cylinder 452, and the air inlet 43 is arranged on the outer cylinder 451; it can be understood that the air outlet 44 is arranged at one end of the inner cylinder 452 away from the second cylinder 46, and the air inlet 43 is arranged on the side wall of the outer cylinder 451; the outer cylinder 451 and the second cylinder 46 can be connected by a threaded structure or the like.

[0049] The inner cylinder 452 is installed in the accommodating space, and an annular space is formed between the outer wall of the inner cylinder 452 and the inner wall of the outer cylinder 451; it can be understood that the inner cylinder 452 can be inserted into the accommodating space from the top.

[0050] The side wall of the inner cylinder 452 is provided with through holes spaced in an annular pattern, and the air inlet 43 is connected to the first inner hole 411 through the annular space and the through holes.

[0051] Specifically, the gas inlet 43 inputs gas into the annular space, and the gas in the annular space is input into the first inner hole 411 from the multiple through holes around it, thereby ensuring the stability of the gas input from the gas inlet 43 to the first inner hole 411.

[0052] In one embodiment, if Figure 1 and Figure 2 As shown, the sequence valve further includes an adjusting joint plugged into the adjusting port 42, an air inlet joint plugged into the air inlet 43, and an air outlet joint plugged into the air outlet 44. It can be understood that the design of the adjusting joint, the air inlet joint and the air outlet joint facilitates the connection of the sequence valve with an external pipeline.

[0053] The above are only embodiments of the sequence valve of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sequence valve, characterized in that: It comprises a sliding rod, a first elastic member, a blocking block and a valve cylinder with an internal space, wherein the valve cylinder is also provided with a regulating port, an air inlet and an air outlet all connected to the internal space; The sliding rod and the blocking block are both slidably installed in the internal space; the first elastic member is installed in the internal space and abuts against the blocking block; the sliding rod is provided with a first annular convex portion for controlling the connection between the air inlet and the air outlet; The gas input from the regulating port to the internal space is used to drive the sliding rod to slide in the internal space through the blocking block, so that the first annular protrusion controls the connection between the air inlet and the air outlet.

2. The sequence valve according to claim 1, characterized in that: The blocking block is provided with a groove, and the sliding rod is also provided with a second annular protrusion; The sequence valve further includes a second elastic member installed in the groove, and one end of the second elastic member abuts against the second annular protrusion.

3. The sequence valve according to claim 1, characterized in that: The internal space includes a first inner hole and a second inner hole connected to the first inner hole, and the inner diameter of the first inner hole is smaller than the inner diameter of the second inner hole; The air inlet and the air outlet are both connected to the first inner hole, and the regulating port is connected to the second inner hole; the blocking block is slidably installed in the second inner hole, the first annular protrusion is slidably inserted in the first inner hole, and the first elastic member is installed in the second inner hole.

4. The sequence valve according to claim 3, characterized in that: The regulating port and the air outlet are arranged at opposite ends of the valve cylinder, and the air inlet is arranged on the side wall of the valve cylinder.

5. The sequence valve according to claim 4, characterized in that: The sequence valve further comprises a first sealing ring and a second sealing ring installed in the first inner hole at intervals, the first sealing ring being located between the air outlet and the air inlet, and the second sealing ring being located between the air inlet and the second inner hole; When the sliding rod drives the first annular protrusion to abut against the first sealing ring, the air inlet is not connected to the air outlet; When the sliding rod drives the first annular protrusion to abut against the second sealing ring, the air inlet is connected to the air outlet.

6. The sequence valve according to claim 3, characterized in that: The sequence valve further comprises a third sealing ring sleeved on the blocking block, and the third sealing ring abuts against the inner wall of the second inner hole.

7. The sequence valve according to claim 3, characterized in that: The valve cylinder includes a first cylinder body and a second cylinder body installed on the first cylinder body; the first inner hole, the air inlet and the air outlet are all arranged on the first cylinder body; the second inner hole and the regulating port are both arranged on the second cylinder body.

8. The sequence valve according to claim 7, characterized in that: The first cylinder comprises an outer cylinder and an inner cylinder with a containing space, the first inner hole and the air outlet are both arranged on the inner cylinder, and the air inlet is arranged on the outer cylinder; The inner cylinder is installed in the accommodating space, and an annular space is formed between the outer wall of the inner cylinder and the inner wall of the outer cylinder; The side wall of the inner cylinder is also provided with through holes distributed at annular intervals, and the air inlet is connected to the first inner hole through the annular space and the through holes.

9. The sequence valve according to any one of claims 1 to 8, characterized in that: The sequence valve further comprises an adjusting joint plugged into the adjusting port, an air inlet joint plugged into the air inlet, and an air outlet joint plugged into the air outlet.

10. A ventilator, characterized in that: Comprising a sequence valve as claimed in any one of claims 1 to 9.

Images