A three-way switch device for infusion

Abstract

The utility model discloses a kind of three-way switch devices for infusion, including three-way valve body, the top of three-way valve body is threadedly connected with end cap, the inside of end cap is equipped with valve handle, the bottom of valve handle is fixedly connected with outer valve core, the surface of outer valve core is equipped with three big holes, the inside of valve handle is equipped with connecting rod, the bottom of connecting rod is fixedly connected with inner valve core, the surface of inner valve core is equipped with three small holes, the inside of valve handle and outer valve core is equipped with the through-hole of being adapted to connecting rod, the vertical movement of connecting rod is driven by the rotation of knob to press down, the sliding displacement of inner valve core in outer valve core is controlled, the small hole of inner valve core and the center of the big hole of outer valve core are accurately aligned, realize accurate flow rate grading adjustment, to provide two clear flow rate gear position selection, avoid the gear position fuzzy problem existing in traditional valve core rotation adjustment, make flow rate control more accurate and reliable.

Description

Technical Field

[0001] This utility model belongs to the field of medical three-way valve technology, and specifically relates to a three-way switch device for infusion. Background Technology

[0002] A medical three-way valve is a medical pipeline control device that allows for the directional flow of liquids by rotating the valve core to switch the connection mode of the three channels.

[0003] Currently, Chinese utility model patent CN202569194U discloses a medical three-way valve, including a valve core and a three-way valve body with a groove. The valve core has a protrusion that matches the groove of the three-way valve body, and the protrusion is sealed within the groove of the three-way valve body. One end of the three-way valve body is provided with a protective sleeve, and the other end is provided with a cap. The end of the three-way valve body is also provided with a spiral locking connector for locking the cap. The protective sleeve is threaded to the end of the three-way valve body. The three-way valve body is made of PC material. Its main technical advantages are: simple structure, convenient operation, transparent shell for easy observation, tight teeth to prevent leakage, which can effectively prevent leakage during the infusion of various drugs and increase the reliability of the infusion process.

[0004] Traditional rotary valve cores lack a clear sense of adjustment during the adjustment process, which can easily lead to unstable flow rate due to operational errors, affecting the treatment effect and failing to achieve precise graded flow rate adjustment. To solve the above problems, we provide a three-way switch device for infusion. Utility Model Content

[0005] The purpose of this invention is to provide a three-way switch device for infusion, in order to solve the problem mentioned in the background art that the traditional rotary valve core lacks a clear sense of gear position during adjustment, is prone to flow rate instability due to operation errors, affects the treatment effect, and cannot achieve precise flow rate graded adjustment.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a three-way infusion switch device, comprising a three-way valve body, an end cap threadedly connected to the top of the three-way valve body, a valve handle sleeved inside the end cap, an outer valve core fixedly connected to the bottom of the valve handle, three large holes on the surface of the outer valve core, a connecting rod sleeved inside the valve handle, an inner valve core fixedly connected to the bottom of the connecting rod, three small holes on the surface of the inner valve core, through holes adapted to the connecting rod in the interior of both the valve handle and the outer valve core, a circular plate fixedly connected to the top of the connecting rod, a knob provided on the top of the circular plate, a T-shaped groove adapted to the circular plate and the connecting rod on the bottom of the knob, the surface of the circular plate engaging with the T-shaped groove, a threaded connection between the top of the valve handle and the knob, a circular groove adapted to the knob on the top of the valve handle, sliders fixedly connected to both sides of the connecting rod, and a sliding groove adapted to the slider in the interior of the through hole.

[0007] Preferably, a fixing plate is fixedly sleeved on the surface of the connecting rod, a sealing ring is sleeved on the surface of the fixing plate, and an annular groove adapted to the sealing ring is formed on the surface of the fixing plate.

[0008] Preferably, a sealing gasket is fitted inside the end cap, and the inside of the sealing gasket is fitted with the valve handle.

[0009] Preferably, the ports on the front and side of the three-way valve body are threaded with a first protective cap, the port on the back of the three-way valve body is threaded with a second protective cap, and three indicator arrows are integrally machined on the top of the valve handle.

[0010] In summary, this utility model has the following beneficial effects: The device uses the rotation and pressure of a knob to drive the connecting rod to move vertically, controlling the sliding displacement of the inner valve core within the outer valve core. This ensures precise alignment between the center of the small hole in the inner valve core and the center of the large hole in the outer valve core, enabling precise flow rate graded adjustment. It provides two distinct flow rate levels, avoiding the ambiguous level problem of traditional valve core rotation adjustment, and making flow rate control more accurate and reliable. Attached Figure Description

[0011] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is an exploded view of the structure of this utility model; Figure 3 This is an exploded cross-sectional view of a portion of the structure of this utility model.

[0012] Reference numerals: 1. Three-way valve body; 2. End cap; 3. Valve handle; 4. Outer valve core; 5. Large hole; 6. Connecting rod; 7. Inner valve core; 8. Small hole; 9. Through hole; 10. Circular plate; 11. Knob; 12. T-slot; 13. Circular groove; 14. Slider; 15. Slide groove; 16. Fixing plate; 17. Sealing ring; 18. Sealing gasket; 19. First protective cap; 20. Second protective cap; 21. Indicator arrow. Detailed Implementation

[0013] The present invention will be further described in detail below with reference to the accompanying drawings.

[0014] Example 1:

[0015] refer to Figure 1-3 A three-way infusion switch device includes a three-way valve body 1, an end cap 2 threadedly connected to the top of the three-way valve body 1, a valve handle 3 sleeved inside the end cap 2, an outer valve core 4 fixedly connected to the bottom of the valve handle 3, three large holes 5 formed on the surface of the outer valve core 4, a connecting rod 6 sleeved inside the valve handle 3, an inner valve core 7 fixedly connected to the bottom of the connecting rod 6, three small holes 8 formed on the surface of the inner valve core 7, and through holes 9 both inside the valve handle 3 and the outer valve core 4 that are adapted to the connecting rod 6. A circular plate 10 is fixedly connected to the top of the connecting rod 6. A knob 11 is provided on the top of the circular plate 10. A T-shaped groove 12 adapted to the circular plate 10 and the connecting rod 6 is opened at the bottom of the knob 11. The surface of the circular plate 10 is engaged with the T-shaped groove 12. The top of the valve handle 3 is threadedly connected to the knob 11. A circular groove 13 adapted to the knob 11 is opened on the top of the valve handle 3. Slider 14 is fixedly connected to both sides of the connecting rod 6. A sliding groove 15 adapted to the slider 14 is opened inside the through hole 9.

[0016] refer to Figure 3 A fixing plate 16 is fixedly sleeved on the surface of the connecting rod 6. A sealing ring 17 is sleeved on the surface of the fixing plate 16. An annular groove adapted to the sealing ring 17 is opened on the surface of the fixing plate 16. By setting the sealing ring 17, the sealing between the fixing plate 16 and the circular groove 13 can be achieved.

[0017] refer to Figure 2 The end cap 2 is fitted with a sealing gasket 18 inside, and the inside of the sealing gasket 18 is fitted with the valve handle 3. By setting the sealing gasket 18 and the end cap 2, the sealing performance between the valve handle 3 and the three-way valve body 1 can be improved.

[0018] refer to Figure 1 The front and side ports of the three-way valve body 1 are threaded with a first protective cap 19, and the back port of the three-way valve body 1 is threaded with a second protective cap 20. The top of the valve handle 3 is integrally machined with three indicator arrows 21. By setting the indicator arrows 21, the flow direction can be effectively indicated.

[0019] Brief description of the usage process: By turning the knob 11, the knob 11 rotates downward inside the circular groove 13. At the same time, the knob 11 drives the connecting rod 6 to move through the circular plate 10. The connecting rod 6 drives the slider 14 to slide inside the sliding groove 15, and ensures that the connecting rod 6 moves vertically. The connecting rod 6 drives the inner valve core 7 to slide inside the outer valve core 4, so that the center point of the small hole 8 coincides with the center point of the large hole 5. Then, the small hole 8 reduces the flow rate of the liquid inside the device, so as to facilitate two-level adjustment of the liquid flow rate.

[0020] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A three-way infusion switch device, comprising a three-way valve body (1), characterized in that: The top of the three-way valve body (1) is threaded with an end cap (2). A valve handle (3) is fitted inside the end cap (2). An outer valve core (4) is fixedly connected to the bottom of the valve handle (3). Three large holes (5) are opened on the surface of the outer valve core (4). A connecting rod (6) is fitted inside the valve handle (3). An inner valve core (7) is fixedly connected to the bottom of the connecting rod (6). Three small holes (8) are opened on the surface of the inner valve core (7). Both the valve handle (3) and the outer valve core (4) have through holes (9) that are compatible with the connecting rod (6). The top of the connecting rod (6) is fixedly connected to the outer valve core (4). A circular plate (10) is connected, and a knob (11) is provided on the top of the circular plate (10). A T-shaped groove (12) adapted to the circular plate (10) and the connecting rod (6) is provided at the bottom of the knob (11). The surface of the circular plate (10) is engaged with the T-shaped groove (12). The top of the valve handle (3) is threaded to the knob (11). A circular groove (13) adapted to the knob (11) is provided on the top of the valve handle (3). Slider (14) is fixedly connected to both sides of the connecting rod (6). A sliding groove (15) adapted to the slider (14) is provided inside the through hole (9).

2. The three-way switch device for infusion according to claim 1, characterized in that: A fixing plate (16) is fixedly sleeved on the surface of the connecting rod (6), and a sealing ring (17) is sleeved on the surface of the fixing plate (16). An annular groove that matches the sealing ring (17) is opened on the surface of the fixing plate (16).

3. The three-way switch device for infusion according to claim 1, characterized in that: The end cap (2) is fitted with a sealing gasket (18), and the inside of the sealing gasket (18) is fitted with the valve handle (3).

4. The three-way switch device for infusion according to claim 1, characterized in that: The three-way valve body (1) has a first protective cap (19) threaded to the front and side ports, and a second protective cap (20) threaded to the back port. The valve handle (3) has three indicator arrows (21) integrally machined on the top.

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