CN111282152A - A fluid control valve for controlling liquid flow and velocity - Google Patents

Abstract

The invention belongs to the technical field of medical instruments, and provides a flow control valve for controlling liquid flow and flow rate, which comprises a valve sleeve and a valve core, wherein the valve sleeve comprises a first connecting part and a second connecting part which are both hollow structures; the valve core comprises a flap type baffle, a circular baffle, a connecting rod and an elastic valve ring, the middle part of the flap type baffle and the middle part of the circular baffle are respectively connected with 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 type baffle is connected with the inner surface of the valve sleeve through a fan-shaped protruding structure on the periphery of the flap type baffle, and the flow control valve is integrally formed except the elastic valve ring. When the flow control valve is used for throat anesthesia, the flow control valve can control the flow and the flow velocity of anesthetic liquid medicine, so that the atomization effect is achieved, the liquid medicine is sprayed more uniformly and absorbed more comprehensively, and secondary pollution caused by medicine backflow is avoided; when the infusion device is used for patients with specific requirements on infusion time and infusion amount, the infusion device can effectively solve the problem of timed and quantitative infusion, and can also effectively avoid the blood return phenomenon caused by the completion of infusion of liquid medicine.

Description

A fluid control valve for controlling liquid flow and velocity

technical field

The invention relates to the field of medical instruments, in particular to a fluid control valve for controlling the flow and flow rate of liquid.

Background technique

Throat anesthesia is widely used in throat surgery and endoscopy, mainly for mucosal surface anesthesia, to ensure that patients with sensitive throat reflexes can cooperate with doctors to complete the examination. In clinical practice, when anesthesiologists perform laryngoscopy, tracheal intubation and throat surgery on patients, they need to anesthetize the patient's throat to relieve pain.

The traditional throat anesthesia device includes a syringe and an injection catheter, and the anesthetic liquid is sprayed to the throat by external force injection. This throat anesthesia device sprays the liquid medicine unevenly, and the spraying speed of the liquid medicine is difficult to control.

Traditional infusion sets generally include infusion needles, infusion tubes, flow regulators and drip buckets, etc., which are connected by catheters. The infusion method is to hang the bottle or infusion bag containing the liquid at a high place, and use the action of gravity to make the liquid pass through the infusion. The leather tube flows into the vein, and the flow rate needs to be manually adjusted by the flow regulator. The degree of adjustment depends on the dripping speed (drops/min) in the drip bucket. When using a traditional infusion set for infusion, you must always pay attention to the change in the amount of liquid in the medicine bottle. If the medicine is not found empty in time, the air will enter the blood vessel through the infusion tube or the blood will flow back from the infusion tube. Air entering the blood vessels may cause adverse consequences, and in severe cases may lead to sudden death.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a new fluid control valve for controlling liquid flow and flow rate, which is simple in structure and convenient in operation, and can overcome the above-mentioned deficiencies of the prior art.

In order to achieve the above object, the present invention provides the following technical solutions, a fluid control valve for controlling the flow rate and flow rate of liquid, including a valve sleeve and a valve core, the valve sleeve includes a first connection part and a second connection part, the first connection part The connecting part and the second connecting part are both hollow structures; the valve core includes a flap-shaped baffle, a circular baffle, a connecting rod and an elastic valve ring, and the middle part of the flap-shaped baffle and the middle part of the circular baffle are the same as the The two ends of the connecting rod are connected respectively, 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, and the flap-shaped baffle is connected to the valve through the fan-shaped convex structure on its outer periphery. The inner surface of the sleeve is connected, and the fluid control valve is integrally formed except for the elastic valve ring.

Other structures of the above-mentioned fluid control valve except the elastic valve ring can be integrally injection-molded with an elastic material, or integrally cast with a rigid material; it depends on the application scenario.

Because the above-mentioned elastic valve ring has elasticity, a corresponding tool can be used to pass through the circular baffle plate through the through hole in the middle of the elastic valve ring, so as to be sleeved on the periphery of the connecting rod.

When the flap-shaped baffle is arranged on the side close to the port of the first connection part, the fluid flows in from the port of the first connection part and flows out from the port of the second connection part; when the flap-shaped baffle is arranged near the port of the second connection part When it is on one side, the fluid flows in from the second connecting portion port and flows out from the first connecting portion port. The specific setting direction of the flap baffle depends on the application scenario.

As a further improvement of the present invention, the fan-shaped protruding structure is connected with the inner surface of the first connecting portion or the inner surface of the second connecting portion. The fan-shaped convex structure can be arranged on any part of the inner surface of the valve sleeve as required, and is preferably arranged on the inner surface of the connection between the first connecting part and the second connecting part, which can increase the strength and service life of the valve core.

As a further improvement of the present invention, the number of the fan-shaped raised structures is three or more, which can realize the function of diverting the flow.

As a further improvement of the present invention, the elastic valve ring is a deformable medical silicone material, which has excellent resistance to various chemicals, has no adverse reaction to the human body, and has better elasticity, which can further control the flow of fluid and flow rate, so that the fluid distribution is more uniform.

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

As a further improvement of the present invention, the outer diameter of the elastic valve ring is greater than or equal to the inner diameter of the valve sleeve, which can be used in the field of medical devices, such as a throat anesthesia device, to make the fluid distribution more uniform and prevent secondary pollution caused by the backflow of the medicinal solution; It can also be used in infusion devices. On the one hand, it can prevent adverse reactions caused by air entering blood vessels, and on the other hand, it can also prevent secondary pollution caused by drugs or blood backflow.

As a further improvement of the present invention, the thickness of the elastic valve ring≤the length of the connecting rod; preferably, the thickness of the elastic valve ring<the length of the connecting rod, at this time, the elastic valve ring can move along the connecting rod to play a buffering role and reduce the elasticity of the fluid. Stress of the 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 fluid control valve. The liquid flow 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 better the elastic valve. The larger the annular variable, the larger the flow velocity; the larger the thickness of the elastic valve ring, the smaller the annular variable of the elastic valve, and the smaller the flow velocity.

As a further improvement of the present invention, the outer diameters of the first connecting part and the second connecting part are the same or different, and can be adjusted according to requirements, such as the connection with other injection equipment, for matching.

As a further improvement of the present invention, the inner diameters of the first connecting part and the second connecting part are the same or different, and can be adjusted according to needs, such as the connection with other injection equipment, for matching.

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 them from falling off.

Compared with the prior art, a fluid control valve for controlling liquid flow and flow velocity provided by the present invention has the following technical effects: when it is used for throat anesthesia, the flow rate and flow velocity of anesthetic liquid can be controlled, so as to achieve the atomization effect. effect, make the liquid spray more uniform, absorb more comprehensively, have better anesthesia effect, reduce or prevent secondary pollution caused by drug backflow; when used in infusion devices, on the one hand, it can prevent adverse reactions caused by air entering the blood vessels, on the other hand On the one hand, it can prevent secondary pollution caused by drug or blood backflow, and effectively avoid the phenomenon of blood backflow caused by drug liquid infusion.

Description of drawings

FIG. 1 is a perspective view of a fluid control valve according to a preferred embodiment of the present invention.

Figure 2 is an A-A cross-sectional view (50% scale) of the fluid control valve of Figure 1 .

FIG. 3 is a B-B sectional view of the fluid control valve of FIG. 1 (approximately 75% scale, view from the direction of the fluid inflow end).

FIG. 4 is a B-B sectional view of the fluid control valve of FIG. 1 (approximately 75% scale, view from the direction of the fluid outflow end).

FIG. 5 is a B-B sectional view (about 75% scale) of the fluid control valve of FIG. 1 without the resilient valve ring installed.

FIG. 6 is a perspective view of a valve core with an elastic valve ring mounted thereon.

Fig. 7 is a perspective view of the valve body without the elastic valve ring (view in the direction of the fluid inflow end).

Fig. 8 is a perspective view of a valve element without an elastic valve ring (view in the direction of the fluid outflow end).

FIG. 9 is a perspective view of the elastic valve ring.

FIG. 10 is a front view of the cross-sectional view of FIG. 2 .

FIG. 11 is a left side view of the perspective view of FIG. 1 .

FIG. 12 is a right side view of the perspective view of FIG. 1 .

Figure 13 is a schematic diagram of an anesthesia injection device.

Figure 14 is a schematic diagram of an infusion device.

The marks in the figure are as follows:

1. Fluid control valve; 1.1, valve sleeve; 1.1.1, first connecting part; 1.1.2, second connecting part; 1.2, valve core; 1.2.1, flap baffle; 1.2.1.1, sector-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 ways

The present invention will now be further described with reference to FIGS. 1 to 14 in the accompanying drawings. FIGS. 1 to 14 show a preferred embodiment of the present invention.

As shown in FIG. 1, it is a perspective view of a fluid control valve according to a preferred embodiment of the invention. Now, the A-A section of FIG. 1 is made, and the A-A section shown in FIG. 2 is obtained. The B-B cross-section of FIG. 1 is taken, and the B-B cross-sectional views shown in FIGS. 3 and 4 are obtained. In order to make the structure of the flow control valve of the present invention and the connection relationship between the various components clearer, FIG. 5 shows the B-B sectional view of the flow control valve without the elastic valve ring installed, and FIG. 6 shows the valve core with the elastic valve ring installed Perspective views, Figures 7-8 show the three-dimensional view of the valve core without the elastic valve ring installed, Figure 9 shows the three-dimensional view of the elastic valve ring, and Figures 10-12 show the plan views of the fluid control valve from various angles. In order to make the explanation of the fluid control valve of the present invention clearer for its usage, FIGS. 13 to 14 show schematic diagrams of the usage method of the fluid control valve.

As shown in FIGS. 2 to 8 , the fluid 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 portion 1.1.1 and a second connecting portion 1.1.2, the Both the first connecting portion 1.1.1 and the second connecting portion 1.1.2 are hollow structures, and the outer diameter of the first connecting portion 1.1.1 is smaller than the outer diameter of the second connecting portion 1.1.2, and the first connecting portion 1.1.1 The inner diameter is equal to the inner diameter of the second connection part 1.1.2; the outer surface of the first connection part 1.1.1 and the inner surface of the second connection part 1.1.2 are provided with threads, which can increase the connection strength with other equipment and prevent them from 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 of the flap-shaped baffle 1.2.1 and the circular baffle 1.2.2 The middle part is connected to the two ends of the connecting rod 1.2.3 respectively, the petal-shaped baffle 1.2.1 is arranged on the side close to the port of the first connecting part 1.1.1, and 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 periphery of the connecting rod 1.2.3, and the flap-shaped baffle 1.2.1 is connected to the valve sleeve 1.1 through the fan-shaped convex structure 1.2.1.1 on its outer periphery. For surface connection, the fluid control valve 1 is integrally formed except for the elastic valve ring 1.2.4. There are three fan-shaped raised structures 1.2.1.1, which are arranged on the inner surface of the second connecting part 1.1.2 and close to one end of the first connecting part 1.1.1. The radial thickness of the second connecting part 1.1.2 is larger than that of the first connecting part 1.1.1. 1 The radial thickness is large, so the strength and service life of the valve core 1.2 can be increased. As shown in Figure 9, 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 fluid flow and flow rate, so that the fluid distribution is more uniform. As shown in Figures 10 to 12, 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 < the length of the connecting rod 1.2.3, and the thickness of the elastic valve ring 1.2.4 is 1mm, at this time, the elastic valve ring 1.2.4 can move along the connecting rod 1.2.3.

The following Embodiments 1 and 2 respectively demonstrate the use of the fluid control valve of the present invention in the field of medical devices, such as anesthesia injection devices and infusion devices.

Example 1:

According to the above structure, the fluid control valve 1 for controlling the flow rate and flow rate of the liquid is used for the injection of lidocaine hydrochloride in the throat in the anesthesia injection device. As shown in Figure 13, the flow control valve 1 is arranged between the injection device 2 and the drug conduit 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 flow control valve The second connection part 1.1.2 of the valve sleeve in 1 is connected to the input end of the drug catheter 3 . When using the injection device 2 to inject the medicinal liquid, put the medicinal catheter 3 with the convex side facing upwards and slowly insert it into the patient's throat until the marker 3.1 reaches the vicinity of the patient's vocal cords, then the penetration can be stopped. 2 The flow control valve 1 flows into the valve core in turn, and flows to the elastic valve ring after being shunted by the flap-shaped baffle. The elastic valve ring is elastically deformed under the pressure of the liquid medicine, and the liquid medicine finally flows into the drug conduit to make the liquid medicine distribution more uniform. , the flow rate is faster, and the high-speed water flow will break into small water droplets after hitting the obstacle, thereby forming a spray. Allows lidocaine hydrochloride to be injected into the throat in a mist form, thereby enhancing the effect of anesthesia. After the injection is completed, the backflow of the medicinal liquid is not easy to occur, causing secondary pollution.

Example 2:

According to the above configuration, the fluid control valve 1 that controls the flow rate and flow rate of the liquid is used in the infusion apparatus. As shown in FIG. 14 , the flow control valve 1 is arranged above the infusion needle 4 , and when the patient is infused, the medicinal liquid 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 connecting part 1.1.1 of the valve sleeve in the flow control valve 1, and flows to the elastic valve ring after being shunted by the flap-shaped baffle. The elastic valve ring is elastically deformed under the pressure of the liquid medicine, and the liquid medicine Finally, it flows to the infusion needle and enters the human body. When the liquid medicine is gradually drained, 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, which prevents the air from entering the blood vessels caused by the liquid medicine running out, and can prevent the backflow of medicine or blood. secondary pollution.

The above descriptions are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions under the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those skilled in the art, 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 (10)

1. A fluid control valve for controlling liquid flow and flow rate, comprising a valve sleeve and a valve core, wherein the valve sleeve comprises a first connecting part and a second connecting part, the first connecting part is connected to the first connecting part and the second connecting part; The two connecting parts are both hollow structures; the valve core includes a flap-shaped baffle, a circular baffle, a connecting rod and an elastic valve ring, and the middle part of the flap-shaped baffle and the middle part of the circular baffle and the two ends of the connecting rod are respectively 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, and the flap-shaped baffle is connected to the inner surface of the valve sleeve through the fan-shaped convex structure on its outer periphery, so The flow control valve is integrally formed except for the elastic valve ring. 2 . The fluid control valve according to claim 1 , wherein the fan-shaped convex structure is connected to the inner surface of the first connecting portion or the inner surface of the second connecting portion. 3 . 3 . The fluid control valve for controlling liquid flow and flow velocity according to claim 1 , wherein the number of the fan-shaped convex structures is three or more. 4 . 4 . The fluid control valve for controlling liquid flow and flow rate according to claim 1 , wherein the elastic valve ring is a deformable medical silica gel material. 5 . 5 . The fluid control valve for controlling liquid flow and flow velocity according to claim 1 , wherein the outer diameter of the elastic valve ring<the inner diameter of the valve sleeve. 6 . 6 . The fluid control valve for controlling liquid flow and flow rate according to claim 1 , wherein the outer diameter of the elastic valve ring is greater than or equal to the inner diameter of the valve sleeve. 7 . 7 . The fluid control valve for controlling liquid flow and flow velocity according to claim 1 , wherein the thickness of the elastic valve ring≤the length of the connecting rod. 8 . 8 . The fluid control valve according to claim 1 , wherein the first connecting portion and the second connecting portion have the same or different outer diameters, and the first connecting portion and the second connecting portion have the same or different outer diameters. 9 . Internal diameters are the same or different. 9 . The fluid control valve for controlling liquid flow and flow rate according to claim 1 , wherein the inner surface or outer surface of the first connecting part and the second connecting part can be provided with threads, grooves or protrusions as required. 10 . point. 10. The fluid control valve for controlling liquid flow and flow rate according to any one of claims 1 to 9, wherein the fluid control valve can be used in the field of medical devices to control fluid flow and flow rate.

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