Medical three-way valve capable of flexibly switching channels

Abstract

The invention discloses a medical three-way valve capable of flexibly switching channels, relates to the technical field of medical instruments, and aims to solve the technical problem that the medical three-way valve comprises a cylindrical valve body, a valve seat is fixedly arranged in the valve body, and a first infusion end and a second infusion end which are communicated with the valve seat are fixedly arranged on the outer side face of the valve body; the position of the valve element can be changed through pressure change to block the liquid instillation channel when a contrast agent is injected, and the liquid instillation channel is communicated with the valve seat through the valve element, so that the contrast agent instillation channel can be blocked, and the contrast agent instillation efficiency is improved. When injection of the contrast agent is finished, the valve element can be reset through the pressure of the instillation liquid, the effect of automatic conduction of different paths is achieved, therefore, the path of the contrast agent and the instillation liquid can be conveniently controlled, the forgetting situation possibly occurring when a doctor frequently and manually switches is avoided, and the contrast agent instillation device has the advantages of being capable of flexibly and automatically switching channels, reducing manual adjusting steps and improving the working efficiency. And the operation is simple.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and more specifically, to a medical three-way valve with flexible channel switching. Background Art

[0002] During medical procedures, operations such as infusing fluids, transfusing blood, injecting drugs, and collecting blood samples from patients are often required. In these operations, medical three-way valves are widely used to achieve the connection, switching, and control of fluid flow between different pipelines.

[0003] Currently, there are various problems with medical three-way valves on the market. For example, during the angiography process of vascular intervention therapy, doctors need to frequently manually switch the three-way valve to control the passage of contrast agent and infusion fluid. Due to the cumbersome operation, doctors are prone to forgetting to switch, resulting in the inability of the infusion fluid to drip continuously, greatly increasing the risk of thrombus formation in the catheter, and even causing life-threatening complications such as cerebral embolism and pulmonary embolism in severe cases. At the same time, the pressure of the contrast agent is usually relatively high. If the three-way valve is not switched in time during angiography, the excessive pressure is likely to damage the three-way valve, thereby delaying the operation time and affecting the operation process and treatment effect. In view of this, we propose a medical three-way valve with flexible channel switching. Summary of the Invention

[0004] The purpose of the present invention is to provide a medical three-way valve with flexible channel switching to solve the technical problem that current doctors need to frequently manually switch the three-way valve to control the passage of contrast agent and infusion fluid, resulting in a cumbersome operation and being prone to forgetting to switch, leading to the inability of the infusion fluid to drip continuously.

[0005] To solve the above technical problems, the present invention provides the following technical solution: A medical three-way valve with flexible channel switching, including a cylindrical valve body. A valve seat is fixedly arranged inside the valve body. The outer side surface of the valve body is fixedly provided with a first infusion end and a second infusion end that communicate with the valve seat, and the second infusion end is inclined upward in the direction close to the first infusion end. The bottom of the valve body is fixedly provided with a liquid outlet end that communicates with the valve seat;

[0006] The valve seat includes a first housing and a second housing. A square-shaped valve cavity is formed between the first housing and the second housing. Three thousand liquid flow holes communicating with the valve cavity are opened on the outer surfaces of the first housing and the second housing, and the three thousand liquid flow holes are respectively communicated with the side ends of the first infusion end, the second infusion end, and the liquid outlet end. A valve core for blocking the orifice of the liquid flow hole communicating with the second infusion end is rotatably installed between the opposite surfaces on one side of the valve cavity, and the other side of the valve core is adapted to the orifice of the top liquid flow hole.

[0007] Preferably, the valve core includes an inclined adjusting plate. Limiting seats are integrally formed on the opposite sides of the adjusting plate. A first blocking block is fixedly provided on the side surface of one of the limiting seats, and the diameter of the first blocking block is greater than the diameter of the liquid flow hole communicated with the second liquid infusion end. A second blocking block is fixedly provided on the side surface of the other limiting seat, and the diameter of the second blocking block is the same as the diameter of the top liquid flow hole.

[0008] Preferably, connecting circular blocks are fixedly provided on the opposite side surfaces at the top end of the adjusting plate, and connecting holes for engaging with the connecting circular blocks are formed on the opposite surfaces of the first shell and the second shell.

[0009] Preferably, a wavy baffle plate adhesively connected to the top of the valve cavity is fixedly provided on the side surface of the adjusting plate near the top end, and the wavy baffle plate is made of a flexible material.

[0010] Preferably, an adjusting assembly for adjusting the diameter of the cavity is rotatably installed inside the first liquid infusion end, and the control end of the adjusting assembly is located outside the first liquid infusion end.

[0011] Preferably, the adjusting assembly includes a rotating rod penetrating through one side of the first liquid infusion end. One end of the rotating rod located inside the first liquid infusion end is rotatably connected to the inner wall of the first liquid infusion end. A circular limiting baffle plate is fixedly installed on the rod wall of the rotating rod located inside the first liquid infusion end, and the diameter of the limiting baffle plate is smaller than the inner cavity diameter of the first liquid infusion end.

[0012] Preferably, a toothed ring is fixedly provided on the rod wall of the rotating rod near the outer wall of the first liquid infusion end. A fixed ring fitting with the toothed ring is sleeved on the rod wall of the rotating rod. Two connecting blocks fixedly connected to the outer wall of the first liquid infusion end are fixedly provided on the side surface of the fixed ring. An elastically telescopic positioning member is fixedly provided at the top of the side surface of the fixed ring near the toothed ring, and the lower end of the positioning member is engaged with the top of the limiting baffle plate.

[0013] Preferably, a positioning groove is formed on the side surface of the first shell where it fits with the second shell, and a positioning block inserted into the positioning groove is fixedly provided on the side surface of the second shell.

[0014] Preferably, a guiding surface inclined towards the bottom liquid flow hole is constructed at the bottom of the valve cavity, and guiding surfaces inclined downwards are constructed at both ends of the side surface where the limiting seat is combined with the second blocking block.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. When injecting the contrast agent, the present invention can change the position of the valve core through pressure changes to block the drip channel, and when the injection of the contrast agent ends, the valve core can be reset by the pressure of the drip solution, achieving the effect of automatic conduction of different paths. In this way, it can conveniently control the passage of the contrast agent and the drip solution, avoid the possible forgetting situation when doctors frequently switch manually, reduce the risk of thrombus formation in the catheter, and reduce the possibility of life-threatening complications such as cerebral embolism and pulmonary embolism.

[0017] 2. The present invention also designs the initial state of the adjusting plate to be inclined, which can press the valve core to keep its position fixed when the drip solution flows downward, so that the first blocking block can keep fitting with the outer wall of the liquid flow hole communicating with the second infusion end, further improving the stability of the blocking position. The design of the diversion surface at the bottom of the valve cavity and the guiding surface at the junction of the limiting seat and the second blocking block is beneficial to guiding the smooth flow of the liquid, reducing the retention and turbulence of the liquid in the valve cavity, and improving the efficiency and stability of infusion.

[0018] 3. The present invention also adjusts the diameter of the cavity through the adjusting component inside the first infusion end, thereby controlling the infusion speed. By rotating the rotating rod, the current-limiting baffle is driven to rotate, changing the size of the gap between the current-limiting baffle and the inner wall of the first infusion end, so as to realize the adjustment of the liquid flow rate, meet the requirements of different patients and different conditions for the infusion speed. With the cooperation of the telescopic positioning part and the toothed ring, the size of the gap between the current-limiting baffle and the inner wall of the first infusion end can be accurately controlled, reducing the difficulty of manual adjustment, improving the operation convenience, and further improving the safety of the infusion work. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is the overall structural schematic diagram of the present invention;

[0020] Figure 2 is the schematic diagram of the external structure of the present invention cut open;

[0021] Figure 3 is the schematic diagram of the internal structure of the present invention cut open;

[0022] Figure 4 is Figure 3 the partial structural schematic diagram of the other side of;

[0023] Figure 5 is the partial structural schematic diagram of the valve seat in the present invention;

[0024] Figure 6 is the schematic diagram of the structure of the first infusion end in the present invention cut open;

[0025] Figure 7 is Figure 4 the enlarged structural schematic diagram of part A in;

[0026] Figure 8 isFigure 6 Schematic enlarged view of the structure of part B in

[0027] Figure 9 Schematic sectional view of a usage state of the present invention.

[0028] Description of reference numerals in the figure:

[0029] 1. Valve body; 2. Valve seat; 201. First housing; 202. Second housing; 203. Valve cavity; 204. Liquid flow hole; 205. Flow guiding surface; 206. Positioning groove; 207. Positioning block; 208. Connecting hole; 3. First liquid infusion end; 4. Second liquid infusion end; 5. Valve core; 501. Adjusting plate; 502. Limiting seat; 503. First blocking block; 504. Second blocking block; 505. Connecting round block; 506. Wave baffle; 507. Guiding surface; 6. Liquid outlet end; 7. Adjusting assembly; 701. Rotating rod; 702. Flow limiting baffle; 703. Tooth ring; 704. Fixed ring; 705. Connecting block; 706. Positioning member. Detailed implementation manner

[0030] As Figures 1 to 9 shown, a medical three-way valve with a flexibly switchable channel according to the present invention includes a cylindrical valve body 1. A valve seat 2 is fixedly arranged inside the valve body 1. A first liquid infusion end 3 and a second liquid infusion end 4 communicated with the valve seat 2 are fixedly arranged on the outer side surface of the valve body 1, and the second liquid infusion end 4 is arranged obliquely upward in the direction close to the first liquid infusion end 3. A liquid outlet end 6 communicated with the valve seat 2 is fixedly arranged at the bottom of the valve body 1. The valve seat 2 is fixed inside the valve body 1 by welding, and the overall material is of medical grade. The oblique upward setting of the second liquid infusion end 4 can prevent backflow during the injection of contrast agent and improve the stability of injection. The setting of the liquid outlet end 6 can facilitate the outflow of the injected medicament.

[0031] The valve seat 2 includes a first housing 201 and a second housing 202. A square-shaped valve cavity 203 is formed between the first housing 201 and the second housing 202. Three liquid flow holes 204 communicated with the valve cavity 203 are opened on the outer surfaces of the first housing 201 and the second housing 202, and the three liquid flow holes 204 are respectively communicated with the side ends of the first liquid infusion end 3, the second liquid infusion end 4, and the liquid outlet end 6. A valve core 5 for blocking the orifice of the liquid flow hole 204 communicated with the second liquid infusion end 4 is rotatably installed between the opposite surfaces on one side of the valve cavity 203, and the other side of the valve core 5 is adapted to the orifice of the top liquid flow hole 204. The first housing 201 and the second housing 202 are connected by welding. The cooperation between the valve cavity 203 and the liquid flow holes 204 facilitates the flow of liquids in different paths. The setting of the valve core 5 can block the other path when one path is penetrated, and can achieve the effect of free switching under the action of liquid pressure.

[0032] In an embodiment of the present invention, the valve core 5 includes an inclined adjustment plate 501. Limit seats 502 are integrally formed on the opposite sides of the adjustment plate 501. A first plugging block 503 is fixedly provided on the side surface of one limit seat 502, and the diameter of the first plugging block 503 is larger than the diameter of the liquid flow hole 204 communicating with the second infusion end 4. A second plugging block 504 is fixedly provided on the side surface of the other limit seat 502, and the diameter of the second plugging block 504 is the same as the diameter of the top liquid flow hole 204. The limit seats 502 on both sides of the adjustment plate 501 can conveniently limit the fixed positions of the first plugging block 503 and the second plugging block 504, facilitating positioning and assembly. When the liquid flow hole 204 communicating with the second infusion end 4 is blocked by the first plugging block 503, the liquid flow hole 204 communicating with the first infusion end 3 can be kept unobstructed. When injecting liquid medicine at the position of the second infusion end 4, the valve core 5 can be flipped by the pressure action to block the liquid flow hole 204 communicating with the first infusion end 3, achieving the effect of free channel switching.

[0033] In an embodiment of the present invention, connecting circular blocks 505 are fixedly provided on the opposite side surfaces at the top end of the adjustment plate 501. Connecting holes 208 combined with the connecting circular blocks 505 are formed on the opposite surfaces of the first housing 201 and the second housing 202. The cooperation between the connecting circular blocks 505 and the connecting holes 208 can conveniently fix the installation position of the valve core 5, enabling it to achieve the flipping effect.

[0034] In an embodiment of the present invention, a wavy baffle 506 adhesively connected to the top of the valve cavity 203 is fixedly provided on the side surface of the adjustment plate 501 near the top end, and the wavy baffle 506 is made of a flexible material. Through the design of the wavy baffle 506, it can play a certain blocking effect during top liquid injection, reducing the flowing range of the liquid medicine after contacting the valve core 5.

[0035] In an embodiment of the present invention, an adjustment assembly 7 for adjusting the cavity diameter is rotatably installed inside the first infusion end 3, and the control end of the adjustment assembly 7 is located outside the first infusion end 3. The adjustment assembly 7 includes a rotating rod 701 penetrating through one side of the first infusion end 3, and one end of the rotating rod 701 inside the first infusion end 3 is rotatably connected to the inner wall of the first infusion end 3. A circular limiting baffle 702 is fixedly installed on the rod wall of the rotating rod 701 inside the first infusion end 3, and the diameter of the limiting baffle 702 is smaller than the inner cavity diameter of the first infusion end 3. The setting of the adjustment assembly 7 can adjust the flowing range of the liquid medicine inside the first infusion end 3, and the gap between the limiting baffle 702 and the inner cavity of the first infusion end 3 can be changed when the rotating rod 701 is rotated.

[0036] In an embodiment of the present invention, a toothed ring 703 is fixedly arranged on the rod wall of the rotating rod 701 near the outer wall of the first infusion end 3. A fixing ring 704 that fits with the toothed ring 703 is sleeved on the rod wall of the rotating rod 701. Two connecting blocks 705 fixedly connected to the outer wall of the first infusion end 3 are fixedly arranged on the side surface of the fixing ring 704. An elastically telescopic positioning member 706 is fixedly arranged at the top of the side surface of the fixing ring 704 close to the toothed ring 703, and the lower end of the positioning member 706 is engaged with the top of the flow-limiting baffle 702; through the cooperation of the toothed ring 703 and the positioning member 706, the position of the rotating rod 701 can be limited, so that after the flow-limiting baffle 702 is flipped to a proper angle, it can be accurately positioned and is not easy to shift, improving the convenience of the adjustment operation.

[0037] In an embodiment of the present invention, a positioning groove 206 is formed on the side surface of the first housing 201 that fits with the second housing 202, and a positioning block 207 inserted into the positioning groove 206 is fixedly arranged on the side surface of the second housing 202; through the combination of the positioning groove 206 and the positioning block 207, the combined position of the first housing 201 and the second housing 202 can be positioned, so that the two are not easy to shift during welding combination, improving the assembly quality.

[0038] In an embodiment of the present invention, a guiding surface 205 inclined towards the bottom liquid flow hole 204 is constructed at the bottom of the valve cavity 203, and guiding surfaces 507 inclined downwards are constructed on both side surfaces of the two ends where the limiting seat 502 is combined with the second plugging block 504; through the arrangement of the guiding surface 205 and the guiding surface 507, it is convenient to guide the flow direction of the liquid medicine, and has the effect of improving the smoothness of the liquid medicine flow.

[0039] Working principle: This embodiment provides a medical three-way valve with flexible channel switching. The medical three-way valve mainly consists of a cylindrical valve body 1 and a valve seat 2 inside it. The outer side of the valve body 1 is provided with a first infusion end 3 and a second infusion end 4 that slopes upward, and the liquid outlet end 6 is provided at the bottom. The valve seat 2 includes a first housing 201 and a second housing 202, and a square-shaped valve cavity 203 is formed between them. Three liquid flow holes 204 communicating with the valve cavity 203 are opened on its outer surface, corresponding to the three ports respectively. A rotatable valve core 5 is installed in the valve cavity 203. The valve core 5 is composed of an inclined adjustment plate 501, limit seats 502 on both sides, a first plugging block 503, and a second plugging block 504. The top end of the adjustment plate 501 is matched with the connection hole 208 on the valve seat 2 through a connecting round block 505 to achieve rotation. When it is necessary to infuse from the first infusion end 3 to the liquid outlet end 6, the downward flow of the drip liquid can press the valve core 5 to deflect downward, so that the orifice of the liquid flow hole 204 communicating the first plugging block 503 with the second infusion end 4 fits, achieving the plugging effect. The first infusion end 3 is communicated with the valve cavity 203 through the corresponding liquid flow hole 204, and the liquid flows out from the liquid outlet end 6 through the valve cavity 203; when it is necessary to inject the contrast agent from the second infusion end 4 to the liquid outlet end 6, the valve core 5 can be deflected upward by the injection pressure, so that the second plugging block 504 plugs the orifice of the top liquid flow hole 204, blocking the downward flow of the top drip liquid, achieving the effect of automatically switching the channel. When the valve core 5 rotates, the wave baffle 506 on the adjustment plate 501 can freely stretch by using the characteristics of its flexible material, playing a role in reducing the flow range. At the same time, the guide surface 205 at the bottom of the valve cavity 203 and the guide surfaces 507 at both ends of the joint between the limit seat 502 and the second plugging block 504 help to guide the liquid flow direction, reducing the flow resistance of the liquid in the valve cavity 203. When it is necessary to adjust the flow rate in the first infusion end 3, by rotating the rotating rod 701, the current-limiting baffle 702 is driven to rotate, changing the gap size between the current-limiting baffle 702 and the inner cavity of the first infusion end 3, so as to adjust the channel diameter of the first infusion end 3 and realize the control of the infusion flow rate of the first infusion end 3. After the current-limiting baffle 702 rotates to a suitable position, the lower end of the positioning member 706 meshes and combines with the top of the current-limiting baffle 702, achieving the limiting effect, preventing the current-limiting baffle 702 from accidentally rotating due to factors such as liquid pressure, and ensuring the stability of the flow rate adjustment. At the same time, the setting of the fixing ring 704 and the connecting block 705 provides a stable support structure for the rotating rod 701, ensuring the reliability of the adjustment assembly 7 during the working process. Through the cooperation of the overall structure, the steps of channel switching can be reduced, the probability of misoperation can be reduced, and the safety of infusion can be effectively improved.

[0040] The embodiments disclosed in this invention are preferred embodiments, but not limited thereto. Those of ordinary skill in the art can easily understand the spirit of this invention based on the above embodiments and make different extensions and changes. However, as long as they do not depart from the spirit of this invention, they are within the protection scope of this invention.

Claims

1. A medical three-way valve with flexible channel switching, characterized in that, It includes a cylindrical valve body (1), a valve seat (2) is fixedly arranged inside the valve body (1), a first liquid infusion end (3) and a second liquid infusion end (4) communicated with the valve seat (2) are fixedly arranged on the outer side surface of the valve body (1), and the second liquid infusion end (4) is arranged to incline upward in the direction close to the first liquid infusion end (3), and a liquid outlet end (6) communicated with the valve seat (2) is fixedly arranged at the bottom of the valve body (1); The valve seat (2) includes a first shell (201) and a second shell (202), a square-shaped valve cavity (203) is constructed between the first shell (201) and the second shell (202), three liquid flow holes (204) communicated with the valve cavity (203) are opened on the outer surfaces of the first shell (201) and the second shell (202), and the three liquid flow holes (204) are respectively communicated with the side ends of the first liquid infusion end (3), the second liquid infusion end (4), and the liquid outlet end (6), a valve core (5) for blocking the orifice of the liquid flow hole (204) communicated with the second liquid infusion end (4) is rotatably installed between the opposite surfaces on one side of the valve cavity (203), and the other side of the valve core (5) is adapted to the orifice of the top liquid flow hole (204).

2. The medical three-way valve with flexible channel switching according to claim 1, characterized in that, The valve core (5) includes an inclined adjusting plate (501), limiting seats (502) are integrally formed on the opposite side surfaces of the adjusting plate (501), a first blocking block (503) is fixedly arranged on the side surface of one limiting seat (502), and the diameter of the first blocking block (503) is larger than the diameter of the liquid flow hole (204) communicated with the second liquid infusion end (4), a second blocking block (504) is fixedly arranged on the side surface of the other limiting seat (502), and the diameter of the second blocking block (504) is the same as the diameter of the top liquid flow hole (204).

3. The medical three-way valve with flexible channel switching according to claim 2, characterized in that, Connecting circular blocks (505) are fixedly arranged on the opposite side surfaces at the top end of the adjusting plate (501), and connecting holes (208) combined with the connecting circular blocks (505) are opened on the opposite surfaces of the first shell (201) and the second shell (202).

4. The medical three-way valve with flexible channel switching according to claim 2, characterized in that, A wavy baffle (506) adhesively connected to the top of the valve cavity (203) is fixedly arranged on the side surface of the adjusting plate (501) close to the top end, and the wavy baffle (506) is made of a flexible material.

5. The medical three-way valve with flexible channel switching according to claim 1, characterized in that, An adjusting assembly (7) with an adjustable channel diameter is rotatably installed inside the first liquid infusion end (3), and the control end of the adjusting assembly (7) is located outside the first liquid infusion end (3).

6. The medical three-way valve with flexibly switchable channels according to claim 5, wherein, The adjusting assembly (7) includes a rotating rod (701) penetrating through one side of the first liquid infusion end (3), and one end of the rotating rod (701) located inside the first liquid infusion end (3) is rotatably connected to the inner wall of the first liquid infusion end (3), a circular current-limiting baffle (702) is fixedly installed on the rod wall of the rotating rod (701) located inside the first liquid infusion end (3), and the diameter of the current-limiting baffle (702) is smaller than the inner cavity diameter of the first liquid infusion end (3).

7. The medical three-way valve with flexible channel switching according to claim 6, characterized in that, A toothed ring (703) is fixedly provided on the rod wall of the rotating rod (701) near the outer wall of the first infusion end (3). A fixing ring (704) that fits with the toothed ring (703) is sleeved on the rod wall of the rotating rod (701). Two connecting blocks (705) fixedly connected to the outer wall of the first infusion end (3) are fixedly provided on the side surface of the fixing ring (704). An elastically telescopic positioning member (706) is fixedly provided at the top of the side surface of the fixing ring (704) close to the toothed ring (703), and the lower end of the positioning member (706) is engaged with the top of the flow-limiting baffle (702).

8. The medical three-way valve with flexible channel switching according to claim 1, wherein A positioning groove (206) is formed on the side surface of the first housing (201) that fits with the second housing (202). A positioning block (207) inserted into the positioning groove (206) is fixedly provided on the side surface of the second housing (202).

9. The medical three-way valve with flexible channel switching according to claim 2, characterized in that, A guiding surface (205) inclined towards the bottom liquid flow hole (204) is formed at the bottom of the valve cavity (203). Downward-inclined guiding surfaces (507) are formed on both side surfaces of the limiting seat (502) where it is combined with the second plugging block (504).

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