A flow control valve for controlling liquid flow and flow rate

Abstract

The present invention belongs to the technical field of medical devices, and provides a flow control valve for controlling the flow rate and flow velocity of a liquid, including a valve sleeve and a valve core, wherein the valve sleeve includes a first connecting portion and a second connecting portion and both are hollow structures; the valve core includes a flap-shaped baffle, a circular baffle, a connecting rod and an elastic valve ring, wherein the middle part of the flap-shaped baffle and the middle part of the circular baffle are respectively connected to the two ends of the connecting rod, the diameter of the circular baffle is smaller than the inner diameter of the valve sleeve, the elastic valve ring is sleeved on the periphery of the connecting rod, the flap-shaped baffle is connected to the inner surface of the valve sleeve through the fan-shaped protrusion structure on its periphery, and the flow control valve is integrally formed except for the elastic valve ring. When it is used for throat anesthesia, the flow control valve can control the flow rate and flow velocity of the anesthetic liquid to achieve an atomization effect, so that the liquid spray is more uniform, the absorption is more comprehensive, and the secondary pollution of drug reflux will not be caused; when it is used for patients with specific requirements for infusion time and infusion volume, it can effectively solve the problem of timed and quantitative infusion, and can also effectively avoid the phenomenon of blood return caused by the infusion of the liquid.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and in particular to a flow control valve for controlling the flow rate and flow velocity of a liquid. Background Art

[0002] Laryngeal anesthesia is widely used in throat surgery and endoscopic examinations. It is mainly used for mucosal surface anesthesia to ensure that patients with sensitive throat reflexes can cooperate with doctors to complete the examination. In clinical practice, anesthesiologists need to anesthetize the patient's throat to relieve pain when performing laryngoscopy, tracheal intubation and throat surgery on patients.

[0003] The traditional throat anesthesia device includes a syringe and an injection catheter, which sprays anesthetic liquid into the throat through external force injection. This throat anesthesia device sprays the liquid unevenly and the spraying speed of the liquid is difficult to control.

[0004] Traditional infusion sets generally include infusion needles, infusion tubes, flow regulators, and drip buckets, which are connected by catheters. The infusion method is to hang a bottle or infusion bag filled with liquid at a high place, and use gravity to make the liquid flow into the vein through the infusion tube. The flow rate needs to be manually adjusted by the flow regulator, and the degree of adjustment depends on the drip rate (drops / minute) in the drip bucket. When using traditional infusion sets for infusion, you must always pay attention to the changes in the amount of liquid in the medicine bottle. If you fail to find that the liquid is empty in time, air will enter the blood vessels through the infusion tube or blood will flow back through the infusion tube. Air entering the blood vessels may cause adverse consequences, and severe cases may lead to sudden death. Summary of the invention

[0005] The purpose of the present invention is to provide a new flow control valve for controlling liquid flow and flow rate, which has a simple structure and is easy to operate, and can overcome the shortcomings of the above-mentioned prior art.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a flow control valve for controlling liquid flow and flow rate, comprising a valve sleeve and a valve core, the valve sleeve comprising a first connecting portion and a second connecting portion, the first connecting portion and the second connecting portion are both hollow structures; the valve core comprises a petal-shaped baffle, a circular baffle, a connecting rod and an elastic valve ring, the middle portion of the petal-shaped baffle and the middle portion of the circular baffle are respectively connected to the two ends of the connecting rod, the diameter of the circular baffle is smaller than the inner diameter of the valve sleeve, the elastic valve ring is sleeved on the outer periphery of the connecting rod, the petal-shaped baffle is connected to the inner surface of the valve sleeve through the fan-shaped protrusion structure on its outer periphery, and the flow control valve is integrally formed except for the elastic valve ring.

[0007] The other structures of the flow control valve except the elastic valve ring can be integrally formed by injection molding of elastic material, or integrally cast by rigid material; it depends on the application scenario.

[0008] Because the elastic valve ring is elastic, a corresponding tool can be used to pass through the circular baffle through the through hole in the middle of the elastic valve ring, so as to be sleeved on the outer periphery of the connecting rod.

[0009] When the above-mentioned petal-shaped baffle is arranged on the side close to the first connection part port, the fluid flows in from the first connection part port and flows out from the second connection part port; when the above-mentioned petal-shaped baffle is arranged on the side close to the second connection part port, the fluid flows in from the second connection part port and flows out from the first connection part port. The specific arrangement direction of the petal-shaped baffle depends on the application scenario.

[0010] As a further improvement of the present invention, the fan-shaped protrusion structure is connected to the inner surface of the first connection part or the inner surface of the second connection part. The fan-shaped protrusion structure can be arranged at any position of the inner surface of the valve sleeve as required, preferably arranged on the inner surface of the connection between the first connection part and the second connection part, which can increase the strength and service life of the valve core.

[0011] As a further improvement of the present invention, the number of the fan-shaped protrusion structures is three or more, which can achieve the function of flow diversion.

[0012] As a further improvement of the present invention, the elastic valve ring is made of deformable medical silicone material, has excellent resistance to a variety of chemicals, has no adverse reactions to the human body, and has better elasticity to further control the flow rate and flow velocity of the fluid, making the fluid distribution more uniform.

[0013] As a further improvement of the present invention, the outer diameter of the elastic valve ring is smaller than the inner diameter of the valve sleeve, and can be used in the field of medical devices, such as throat anesthesia devices, to make the fluid distribution more uniform and reduce secondary pollution caused by the backflow of the drug solution.

[0014] As a further improvement of the present invention, the outer diameter of the elastic valve ring is ≥ the inner diameter of the valve sleeve, and can be used in the field of medical devices, such as throat anesthesia devices, to make the fluid distribution more uniform and prevent secondary contamination caused by the backflow of the drug solution; it can also be used in infusion devices, which can prevent the adverse reactions caused by the entry of air into the blood vessels on the one hand, and prevent secondary contamination caused by the backflow of drugs or blood on the other hand.

[0015] As a further improvement of the present invention, the thickness of the elastic valve ring is ≤ the length of the connecting rod; preferably, the thickness of the elastic valve ring is < the length of the connecting rod. In this case, the elastic valve ring can move along the connecting rod to play a buffering role and reduce the stress of the fluid on the elastic valve ring. The thickness of the elastic valve ring is preferably 0.01-10 mm, which can be adjusted according to needs or the size of the flow control valve. The liquid flow rate and flow rate are controlled by the thickness of the elastic valve ring. Under the same pressure, the smaller the thickness of the elastic valve ring, the larger the elastic valve ring variable and the greater the flow rate; the larger the thickness of the elastic valve ring, the smaller the elastic valve ring variable and the smaller the flow rate.

[0016] As a further improvement of the present invention, the outer diameters of the first connecting portion and the second connecting portion are the same or different, and can be adjusted as needed, such as according to the connection conditions with other injection devices, to match.

[0017] As a further improvement of the present invention, the inner diameters of the first connecting portion and the second connecting portion are the same or different, and can be adjusted as needed, such as according to the connection conditions with other injection devices, to match.

[0018] As a further improvement of the present invention, the inner surface or outer surface of the first connecting part and the second connecting part can be provided with threads as required, which can increase the connection strength with other equipment and prevent falling off.

[0019] Compared with the prior art, the flow control valve for controlling the liquid flow and flow rate provided by the present invention has the following technical effects: when used for throat anesthesia, the flow and flow rate of the anesthetic liquid can be controlled to achieve the effect of atomization, so that the liquid medicine can be sprayed more evenly, absorbed more comprehensively, and have a better anesthetic effect, and the secondary pollution caused by drug reflux can be reduced or prevented; when used in an infusion device, on the one hand, it can prevent the adverse reactions caused by the entry of air into the blood vessels, and on the other hand, it can prevent the secondary pollution caused by the reflux of drugs or blood, and effectively avoid the blood return phenomenon caused by the infusion of the liquid medicine. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional view of a flow control valve according to a preferred embodiment of the present invention.

[0021] Figure 2 for Figure 1 AA section of the flow control valve (50% scale).

[0022] Figure 3 for Figure 1 BB cross-sectional view of the flow control valve (about 75% scale, view from the fluid inlet end).

[0023] Figure 4 for Figure 1 BB cross-sectional view of the flow control valve (about 75% scale, view from the fluid outflow end).

[0024] Figure 5 for Figure 1 BB cross-section of a flow control valve without an elastic valve ring installed (about 75% scale).

[0025] Figure 6 A three-dimensional view of a valve core with an elastic valve ring installed.

[0026] Figure 7 It is a three-dimensional view of the valve core without the elastic valve ring installed (a view from the fluid inlet end).

[0027] Figure 8 It is a three-dimensional view of the valve core without the elastic valve ring installed (a view from the fluid outflow end direction).

[0028] Fig. 9 It is a three-dimensional diagram of the elastic valve ring.

[0029] Fig.10 for Figure 2 Front view of the section view.

[0030] Fig.11 for Figure 1 Left view of the stereogram.

[0031] Fig.12 for Figure 1 Right side view of the stereogram.

[0032] Fig.13 Schematic diagram of the anesthesia injection device.

[0033] Fig.14 Schematic diagram of the infusion device.

[0034] The marks in the figure are as follows:

[0035] 1. Flow control valve; 1.1. Valve sleeve; 1.1.1. First connection part; 1.1.2. Second connection part; 1.2. Valve core; 1.2.1. Petal-type baffle; 1.2.1.1. Fan-shaped protrusion structure; 1.2.2. Circular baffle; 1.2.3. Connecting rod; 1.2.4. Elastic valve ring; 2. Injection device; 3. Drug catheter; 3.1. Marker; 4. Infusion needle; 5. Infusion bottle; 6. Infusion tube. DETAILED DESCRIPTION

[0036] Now in conjunction with the accompanying drawings in the specification Figures 1 to 14 To further illustrate the present invention, Figures 1 to 14 What is shown is a preferred embodiment of the present invention.

[0037] like Figure 1 , which is a stereoscopic view of a flow control valve according to a preferred embodiment of the invention. Figure 1 Make the AA section and get Figure 2 AA section view shown. Figure 1 Make a BB section and get Figure 3 and Figure 4 In order to make the connection relationship between the flow control valve structure and the components of the present invention clearer, Figure 5 The BB section of the flow control valve without the elastic valve ring installed is shown. Figure 6 A three-dimensional view of the valve core with the elastic valve ring installed is shown. Figure 7-8 A three-dimensional view of the valve core without the elastic valve ring installed is shown. Fig. 9 A stereogram showing the elastic valve ring, Figure 10 to Figure 12 The plan views of the flow control valve at various angles are shown. In order to make the explanation of the use of the flow control valve of the present invention clearer, Figure 13-14 A schematic diagram showing how to use the flow control valve.

[0038] like Figure 2 to Figure 8 As shown, the flow control valve 1 of the present invention includes a valve sleeve 1.1 and a valve core 1.2, the valve sleeve 1.1 includes a first connecting part 1.1.1 and a second connecting part 1.1.2, the first connecting part 1.1.1 and the second connecting part 1.1.2 are both hollow structures, and the outer diameter of the first connecting part 1.1.1 is smaller than the outer diameter of the second connecting part 1.1.2, and the inner diameter of the first connecting part 1.1.1 is equal to the inner diameter of the second connecting part 1.1.2; the outer surface of the first connecting part 1.1.1 and the inner surface of the second connecting part 1.1.2 are provided with threads, which can increase the connection strength with other equipment and prevent falling off. The valve core 1.2 includes a flap-shaped baffle 1.2.1, a circular baffle 1.2.2, a connecting rod 1.2.3 and an elastic valve ring 1.2.4. The middle part of the flap-shaped baffle 1.2.1 and the middle part of the circular baffle 1.2.2 are respectively connected to the two ends of the connecting rod 1.2.3. The flap-shaped baffle 1.2.1 is arranged on the side close to the port of the first connecting part 1.1.1. The diameter of the circular baffle 1.2.2 is smaller than the inner diameter of the valve sleeve 1.1. The elastic valve ring 1.2.4 is sleeved on the outer periphery of the connecting rod 1.2.3. The flap-shaped baffle 1.2.1 is connected to the inner surface of the valve sleeve 1.1 through the fan-shaped protrusion structure 1.2.1.1 on its periphery. The flow control valve 1 is integrally formed except for the elastic valve ring 1.2.4. There are three fan-shaped protrusion structures 1.2.1.1, which are arranged on the inner surface of the second connection part 1.1.2 and close to one end of the first connection part 1.1.1. The radial thickness of the second connection part 1.1.2 is greater than that of the first connection part 1.1.1, so the strength and service life of the valve core 1.2 can be increased. Fig. 9 As shown, the elastic valve ring 1.2.4 is a deformable medical silicone material, which has excellent resistance to a variety of chemicals, has no adverse reactions to the human body, and has better elasticity to further control the flow rate and flow rate of the fluid, making the fluid distribution more uniform. Figure 10 to Figure 12 As shown, the outer diameter of the elastic valve ring 1.2.4 is equal to the inner diameter of the valve sleeve 1.1, the thickness of the elastic valve ring 1.2.4 is less than the length of the connecting rod 1.2.3, and the thickness of the elastic valve ring 1.2.4 is 1 mm. At this time, the elastic valve ring 1.2.4 can move along the connecting rod 1.2.3.

[0039] The following Examples 1 and 2 respectively demonstrate the use of the flow control valve of the present invention in the field of medical devices, specifically in anesthesia injection devices and infusion devices.

[0040] Embodiment 1:

[0041] According to the above structure, the flow control valve 1 for controlling the liquid flow and flow rate is used for the injection of lidocaine hydrochloride in the throat in the anesthesia injection device. Fig.13 As shown, the flow control valve 1 is arranged between the injection device 2 and the drug catheter 3, that is, the first connection part 1.1.1 of the valve sleeve in the flow control valve 1 is connected to the output end of the injection device 2, and the second connection part 1.1.2 of the valve sleeve in the flow control valve 1 is connected to the input end of the drug catheter 3. When the injection device 2 is used to inject the drug solution, the drug catheter 3 is slowly inserted into the patient's throat with the convex surface facing upward until the marker 3.1 reaches the vicinity of the patient's vocal cords, and then the penetration can be stopped. Under the action of external force, the drug solution flows from the injection device 2 through the flow control valve 1 into the valve core in sequence, and flows to the elastic valve ring after being diverted by the flap-shaped baffle. The elastic valve ring undergoes elastic deformation under the pressure of the drug solution, and the drug solution finally flows into the drug catheter, so that the drug solution is more evenly distributed and the flow rate is faster. After the high-speed water flow encounters an obstacle, it will break into small water droplets, thereby forming a spray. This allows lidocaine hydrochloride to be injected into the throat in the form of mist, thereby enhancing the anesthetic effect. After the injection is completed, it is not easy for the drug solution to flow back, causing secondary pollution.

[0042] Embodiment 2:

[0043] According to the above structure, the flow control valve 1 for controlling the liquid flow rate and flow rate is used in the infusion device. Fig.14 As shown, the flow control valve 1 is arranged above the infusion needle 4. When the patient is infused, the liquid medicine flows from the infusion bottle 5 through the infusion tube 6 into the flow control valve 1. The liquid medicine flows into the valve core from the first connection part 1.1.1 of the valve sleeve in the flow control valve 1, and flows to the elastic valve ring after being diverted by the flap-shaped baffle. The elastic valve ring undergoes elastic deformation under the pressure of the liquid medicine, and the liquid medicine finally flows to the infusion needle and enters the human body. When the liquid medicine gradually flows out, the force provided by the gravity of the liquid medicine is not enough to deform the elastic valve ring. At this time, the elastic valve ring returns to its original shape, avoiding the air from entering the blood vessels caused by the liquid medicine flowing out, and preventing secondary contamination caused by the backflow of drugs or blood.

[0044] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A flow control valve for controlling liquid flow and flow rate, comprising a valve sleeve and a valve core, characterized in that: The valve sleeve includes a first connecting part and a second connecting part, and the first connecting part and the second connecting part are both hollow structures; the valve core includes a petal-shaped baffle, a circular baffle, a connecting rod and an elastic valve ring, the middle part of the petal-shaped baffle and the middle part of the circular baffle are respectively connected to the two ends of the connecting rod, the diameter of the circular baffle is smaller than the inner diameter of the valve sleeve, and the elastic valve ring is sleeved on the periphery of the connecting rod, and the liquid flow and flow rate are controlled by the thickness of the elastic valve ring; the petal-shaped baffle is connected to the inner surface of the valve sleeve through the fan-shaped protrusion structure on its outer periphery, and the flow control valve is integrally formed except for the elastic valve ring; the fan-shaped protrusion structure is more than three; the outer surface of the first connecting part and the inner surface of the second connecting part are provided with threads; the outer diameter of the elastic valve ring is less than the inner diameter of the valve sleeve.

2. The flow control valve for controlling liquid flow and flow rate according to claim 1, characterized in that: The fan-shaped protrusion structure is connected to the inner surface of the first connection part or the inner surface of the second connection part.

3. The flow control valve for controlling liquid flow and flow rate according to claim 1, characterized in that: The elastic valve ring is made of deformable medical silicone material.

4. The flow control valve for controlling liquid flow and flow rate according to claim 1, characterized in that: The thickness of the elastic valve ring is ≤ the length of the connecting rod.

5. The flow control valve for controlling liquid flow and flow rate according to claim 1, characterized in that: The outer diameters of the first connecting portion and the second connecting portion are the same or different, and the inner diameters of the first connecting portion and the second connecting portion are the same or different.

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