A three-way valve with filtering function

Abstract

The present invention discloses a three-way valve with a filtering function, comprising a valve body (1) and a valve core (2), wherein the valve body (1) comprises a straight-through (3), a bypass (4) and a liquid outlet (5), and is characterized in that it also comprises a filter (6), wherein the filter (6) comprises a first housing (7), a second housing (8), a filter core (9) and a filter membrane (10), wherein the first housing (7) is mounted on the bypass (4) and communicates with the bypass (4), the filter core (9) and the filter membrane (10) are both mounted in the first housing (7) and the filter core (9) is located on a side close to the bypass (4), and the second housing (8) covers the first housing (7) and is used to fix the filter core (9) and the filter membrane (10). The beneficial effects of the present invention are as follows: the present invention can meet the needs of anesthesia administration during surgery, and can also ensure the safety of infusion of patients during surgery and avoid the occurrence of adverse reactions to infusion, and the present invention also has the advantages of simple structure and convenient use.

Description

Technical Field

[0001] The invention relates to a three-way valve with a filtering function, belonging to the technical field of medical devices. Background Art

[0002] Three-way valves are widely used in intravenous infusion, arterial puncture, and intravenous drug pump administration in operating rooms. A patient can use three to four disposable three-way valves, or even more. However, with the rapid development of intravenous anesthesia administration, the application of three-way valves is becoming more and more extensive. The channel of the three-way valve connected to one end of the precision infusion set has the filtering function of the precision infusion set, which can filter out larger particles and air well to ensure the safety of the patient. However, the end of the three-way valve without the connection of the precision infusion set does not have any filtering function. The anesthesiologist frequently administers drugs, which often brings in air and particles, and does not guarantee the safety of the patient.

[0003] As shown in Appendix 1, a medical three-way valve is disclosed, which includes a valve body, a positioning cavity is provided at the upper end of the valve body, and interfaces 1, 2 and 3 are provided on the outer side of the valve body, which are all connected to the positioning cavity in the valve body. A valve core is provided in the positioning cavity, and the valve core includes a handle body provided outside the upper end of the valve body, an annular boss is provided on the upper end surface of the valve body, and recesses 1, 2 and 3 are provided on the outer side of the annular boss. A convex strip with elasticity is provided on the lower end surface of the handle body, and when the handle body rotates, the convex strip can move between recesses 1, 2 and 3 along the outer wall of the annular boss. When the convex strip is inserted into recess 1, the valve core connects interface 1 with interface 2, when the convex strip is inserted into recess 2, the valve core connects interface 1, interface 2 and interface 3, and when the convex strip is inserted into recess 3, the valve core connects interface 2 with interface 3. All interfaces are not provided with filters, and particles entering the three-way valve cannot be filtered.

[0004] Appendix 1: Invention patent announcement document with announcement number CN208756677U. Summary of the invention

[0005] The purpose of the present invention is to provide a three-way valve with a filtering function, which can meet the needs of anesthesia administration during surgery, ensure the safety of patient infusion during surgery, and avoid the occurrence of adverse reactions to infusion.

[0006] In order to solve the above problems, the technical solution adopted by the present invention is: a three-way valve with a filtering function, including a valve body and a valve core, the valve body includes a straight-through, a bypass and a liquid outlet, and also includes a filter, the filter includes a first shell, a second shell, a filter element and a filter membrane, the first shell is installed on the bypass and communicates with the bypass, the filter element and the filter membrane are both installed in the first shell and the filter element is located on the side close to the bypass, and the second shell and the first shell cover and are used to fix the filter element and the filter membrane. The present invention sets a filter on the three-way valve, when the anesthesiologist frequently administers drugs and brings particles into the three-way, the particles brought into the three-way can be filtered out, ensuring the safety of the patient's infusion during surgery and avoiding adverse reactions caused by particles mixed in the infused liquid.

[0007] As a further improvement of the present invention, a through hole is opened on the first shell along its axial direction, and the through holes include a first through hole, a second through hole and a third through hole which are connected in sequence, the first through hole is used to connect the bypass, the diameter of the second through hole is larger than the diameter of the first through hole, the diameter of the third through hole is larger than the diameter of the second through hole, the diameter of the filter element is equal to the diameter of the second through hole and is arranged in the second through hole, the filter membrane is arranged in the third through hole and its diameter is equal to the diameter of the third through hole, the diameter of one end of the second shell used to cover the first shell is equal to the diameter of the second through hole, and when the second shell covers the first shell, the end of the second shell extends into the third through hole and presses the filter membrane. In the present invention, the first shell covers the second shell, and the filter element and the filter membrane are pressed into the first shell, and no other components are required to fix the filter element and the filter membrane. The structure used to fix the filter element and the filter membrane of the present invention is simple.

[0008] As a further improvement of the present invention, an internal thread is provided in the first through hole, an external thread is provided at one end of the second housing that covers the first housing, and the first housing and the second housing are threadedly matched. The first housing and the second housing of the present invention are threadedly connected, which facilitates the installation and disassembly of the first housing and the second housing, and also facilitates the installation and replacement of the filter element and the filter membrane.

[0009] As a further improvement of the present invention, the end of the bypass is provided with an external thread, the first through hole is provided with an internal thread, the bypass extends into the first through hole and the first through hole is threadedly matched. In the present invention, the bypass is threadedly connected with the first through hole, which facilitates the disassembly and installation of the bypass and the filter.

[0010] As a further improvement of the present invention, the valve core is connected with a handle for rotating the valve core, the handle includes a connection portion fixed to the valve core and three extension rods, one end of the extension rod is connected to the connection portion, the top of the extension rod is provided with an oblong groove along its length, a plurality of first protrusions and a second protrusion are provided in the groove, the second protrusion is located at one end of the groove away from the connection portion, and the end of the second protrusion away from the connection portion is in a “>” shape, the length of the first protrusion from one close to the connection portion to one away from the connection portion is an arithmetic progression, and the distances between two adjacent first protrusions are equal. The present invention provides a handle to facilitate the rotation of the valve core, and the first protrusion and the second protrusion in the groove in the present invention are used to indicate the flow direction of the liquid medicine in the three-way, which is convenient for identification when used in the present invention.

[0011] As a further improvement of the present invention, a first protective cap is detachably provided on the straight-through, a second protective cap is detachably provided on the liquid outlet, and a third protective cap is detachably provided on an end of the second shell away from the first shell. The present invention provides the first protective cap, the second protective cap and the third protective cap to prevent particles from entering the tee when not in use.

[0012] As a further improvement of the present invention, a positioning device is also included, the positioning device includes a mounting seat fixed on the bypass, an elastic member and a fixed seat, the fixed seat has a slot for matching with the extension rod at one end away from the bypass, the elastic member connects the mounting seat and the fixed seat, the fixed seat can move relative to the mounting seat, and the elastic member contracts when the fixed seat moves relative to the mounting seat. The positioning device is provided in the present invention to prevent erroneous operation when the valve core does not need to be rotated.

[0013] As a further improvement of the present invention, a mounting hole is provided on the mounting seat, and the mounting hole includes a first mounting hole unit and a second mounting hole unit, the first mounting hole unit is located on a side close to the extension rod and communicates with the second mounting hole unit, the diameter of the first mounting hole unit is smaller than the diameter of the second mounting hole unit, the fixing seat includes a connecting end and a fixing end, the card slot is provided on the fixing end, the connecting end passes through the first mounting hole unit and extends into the second mounting hole unit, and the portion of the connecting end located in the second mounting hole unit is larger than the end connected to the fixing end. In the present invention, the mounting hole is composed of two parts, and the unequal apertures are used to limit the butt end to prevent the mounting seat from being separated from the fixing seat.

[0014] As a further improvement of the present invention, the connecting section includes two connecting units, a gap is left between the connecting units, and the end of the connecting unit away from the fixed end is a conical surface with a larger upper end and a smaller lower end. The two connecting units in the present invention facilitate the installation of the connecting section in the installation hole.

[0015] As a further improvement of the present invention, a first fixing cylinder is provided at the bottom of the fixed end, a second fixing cylinder is provided at the bottom of the second mounting hole unit, the elastic member is a spring, and both ends of the spring extend into the first fixing cylinder and the second fixing cylinder respectively. The present invention provides two fixing cylinders for fixing the spring from both ends thereof.

[0016] In summary, the beneficial effects of the present invention are as follows: the present invention can meet the needs of anesthesia administration during surgery, ensure the safety of patient infusion during surgery, and avoid the occurrence of adverse reactions to infusion. The present invention also has the advantages of simple structure and easy use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a top view of the present invention.

[0018] Figure 2 yes Figure 1 AA section view.

[0019] Figure 3 It is the front view of the present invention.

[0020] Figure 4 yes Figure 3 BB cross-sectional view.

[0021] Figure 5 It is a three-dimensional structural schematic diagram of the present invention.

[0022] Figure 6 It is a three-dimensional exploded view of the present invention at a first angle.

[0023] Figure 7 yes Figure 6 A partial enlarged view of point C in the middle.

[0024] Figure 8 It is a three-dimensional exploded view from a second angle of the present invention.

[0025] Fig. 9 yes Figure 8 A partial enlarged view of point D in the middle.

[0026] Fig.10 It is a three-dimensional exploded view of the present invention from a third angle.

[0027] Fig.11 yes Fig.10 A partial enlarged view of point E in the middle.

[0028] Wherein: 1. valve body; 2. valve core; 3. straight-through; 4. bypass; 5. liquid outlet; 6. filter; 7. first shell; 8. second shell; 9. filter element; 10. filter membrane; 11. handle; 12. connecting part; 13. extension rod; 14. groove; 15. first protrusion; 16. second protrusion; 17. weight-reducing hole; 18. first protective cap; 19. second protective cap; 20. blind hole; 21. limiting column; 22. third protective cap; 23. mounting seat; 24. elastic member; 25. fixing seat; 26. slot; 27. mounting hole; 28. first mounting hole unit; 29. ​​second mounting hole unit; 30. connecting end; 31. fixing end; 32. connecting unit; 33. gap; 34. cone surface; 35. first fixing cylinder; 36. second fixing cylinder. DETAILED DESCRIPTION

[0029] like Figures 1 to 11 The three-way valve with filtering function shown in the figure comprises a valve body 1 and a valve core 2, the valve body 1 comprises a straight-through 3, a bypass 4 and a liquid outlet 5, the valve body 1 is a prior art, and the present invention is provided with a filter 6, the filter 6 comprises a first shell 7, a second shell 8, a filter element 9 and a filter membrane 10, the first shell 7 is installed on the bypass 4 and communicates with the bypass 4, the filter element 9 and the filter membrane 10 are both installed in the first shell 7 and the filter element 9 is located on the side close to the bypass 4, the surface of the filter element 9 away from the bypass 4 is in contact with the filter membrane 10, and the second shell 8 covers the first shell 7 and is fixed to fix the filter element 9 and the filter membrane 10 in the first shell 7.

[0030] The first housing 7 of the present invention is provided with through holes along its axial direction, and the through holes include a first through hole (not shown in the figure), a second through hole (not shown in the figure) and a third through hole (not shown in the figure) which are sequentially connected, the first through hole is used to connect the bypass 4, the diameter of the second through hole is larger than the diameter of the first through hole, the diameter of the third through hole is larger than the diameter of the second through hole, the first through hole, the second through hole and the third through hole in the present invention are coaxial, the diameter of the filter element 9 is equal to the diameter of the second through hole and is arranged in the second through hole, the thickness of the filter element 9 is equal to the length of the second through hole The filter element 9 is equal to the first through hole and the second through hole. The end of the filter element 9 close to the bypass 4 is in contact with the shoulder formed at the connection between the first through hole and the second through hole. The filter membrane 10 is arranged in the third through hole and its diameter is equal to the diameter of the third through hole. The thickness of the filter membrane 10 is less than the length of the third through hole. The diameter of one end of the second shell 8 used to cover the first shell 7 is equal to the diameter of the second through hole. When the second shell 8 is covered with the first shell 7, the end of the second shell 8 extends into the third through hole, and the end of the second shell 8 is in contact with the filter membrane 10 and presses the filter membrane 10.

[0031] In the present invention, preferably, an internal thread is provided in the first through hole, an external thread is provided at one end of the second housing 8 that overlaps with the first housing 7, and the first housing 7 and the second housing 8 are threadedly matched to realize the detachable connection between the first housing 7 and the second housing 8. In the present invention, an external thread is provided at the end of the bypass 4, an internal thread is provided in the first through hole, the bypass 4 extends into the first through hole and the first through hole is threadedly matched.

[0032] In the present invention, a handle 11 for rotating the valve core 2 is connected to the valve core 2, the handle 11 includes a connecting portion 12 fixed to the valve core 2 and three extending rods 13, one end of the extending rod 13 is connected to the connecting portion 12, wherein two extending rods 13 are located on the same straight line and are perpendicular to the other extending rod 13, the cross-section of the extending rod is rectangular, the top of the extending rod 13 is provided with an oblong groove 14 along its length, a plurality of first protrusions 15 and a second protrusion 16 are provided in the groove 14, the second protrusion 16 is located at one end of the groove 14 away from the connecting portion 12, and the end of the second protrusion 16 away from the connecting portion 12 is in a “>” shape, which is used to show the flow direction of the fluid in the three-way valve, in the present invention, the length of the first protrusion 15 from one close to the connecting portion 12 to one away from the connecting portion 12 is an arithmetic progression, and the distance between two adjacent first protrusions 15 (the width of the gap between two adjacent first protrusions 15) is equal.

[0033] The present invention preferably manufactures the connecting portion 12 and the valve core 2 as one piece, and sets a circular lightening hole 17 on the connecting portion 12 along its axial direction. The diameter of the lightening hole 17 is smaller than the diameter of the valve core 2 , and the lightening hole 17 extends downward to the valve core 2 .

[0034] Example 2

[0035] This embodiment is a further improvement made on the basis of the embodiment 1. Compared with the embodiment 1, the embodiment is provided with a first protective cap 18 detachably on the through hole 3, a second protective cap 19 detachably on the liquid outlet 5, and a third protective cap 22 detachably on the end of the second shell 8 away from the first shell 7, and the structures of the first protective cap 18, the second protective cap 19 and the third protective cap 22 are the same. The structure of the first protective cap 18 in the present invention is: a blind hole 20 is opened on the first protective cap 18, the blind hole 20 is used to cooperate with the through hole 3, and the through hole 3 can be inserted into and pulled out of the blind hole 20. In this embodiment, preferably, an internal thread is provided in the blind hole 20, and an external thread is provided at the end of the through hole 3, and the through hole 3 is inserted into the blind hole 20 and is threadedly matched with the blind hole 20, so that the through hole 3 is detachably connected to the first protective cap 18. The structure of the rest of the embodiment is the same as that of the embodiment 1, and the specifics can be referred to the embodiment 1, and the embodiment will not be repeated.

[0036] Example 3

[0037] This embodiment is a further improvement on the basis of the embodiment 2. Compared with the embodiment 2, the embodiment provides a limiting column 21 in the blind hole 20. The limiting column 21 is coaxial with the blind hole 20. The diameter of the limiting column 21 is equal to the inner diameter of the through hole 3. When the first protective cap 18 is installed on the through hole 3, the limiting column 21 extends into the through hole 3. The structure of the rest of the embodiment is the same as that of the embodiment 2. The details can be referred to the embodiment 2, and the embodiment will not be described in detail.

[0038] Example 4

[0039] The present embodiment is a further improvement on the basis of the embodiment 3. Compared with the embodiment 3, the present embodiment is provided with a positioning device, which includes a mounting seat 23, an elastic member 24 and a fixing seat 25 fixed on the bypass 4. The fixing seat 25 has a groove 26 for cooperating with the extension rod 13 at one end away from the bypass 4. The elastic member 24 connects the mounting seat 23 and the fixing seat 25. The fixing seat 25 can move relative to the mounting seat 23. When the fixing seat 25 moves relative to the mounting seat 23, the elastic member 24 contracts. When the valve core 2 needs to be rotated, the fixing seat 25 is pressed downward by hand to disengage the extension rod 13 from the groove 26. The positioning device no longer blocks the extension rod 13, and the valve core 2 can be rotated freely. When the valve core 2 rotates 90 degrees, the fixing seat 25 is released. Under the action of the elastic member 24, the fixing seat 25 rebounds. The extension rod 13 rotated to the top of the fixing seat 25 is stuck in the groove 26, and the valve core 2 is fixed again. In the present invention, the mounting seat 23 and the bypass 4 are integrally formed and manufactured.

[0040] The present invention has a mounting hole 27 on the mounting seat 23, and the mounting hole 27 includes a first mounting hole unit 28 and a second mounting hole unit 29. The first mounting hole unit 28 is located on a side close to the extension rod 13 and is communicated with the second mounting hole unit 29 and the two are coaxial. The diameter of the first mounting hole unit 28 is smaller than the diameter of the second mounting hole unit 29. A shoulder is formed at the connection between the first mounting hole unit 28 and the second mounting hole unit 29. The fixing seat 25 includes a connecting end 30 and a fixing end 31. The slot 26 is provided on the fixing end 31. The connecting end 30 passes through the first mounting hole unit 28 and extends into the second mounting hole unit 29. The portion of the connecting end 30 located in the second mounting hole unit 29 is larger than the end thereof connected to the fixing end 31. The shoulder at the connection between the first mounting hole unit 28 and the second mounting hole unit 29 is used to prevent the connecting end 30 from popping out of the mounting hole 27.

[0041] The connecting section 30 in the present invention includes two connecting units 32 with cross sections slightly smaller than a semicircle, with a gap 33 left between the connecting units 32. The end of the connecting unit 32 away from the fixed end 31 is a conical surface 34 with a larger upper end and a smaller lower end. When the connecting section 30 is installed in the mounting seat 23, the conical surface 34 at the bottom of the connecting section 30 is first placed in the first mounting hole unit 28, and the fixing seat 25 is pressed downward. At this time, due to the presence of the conical surface 34, the two connecting units 32 are deformed and bent in a direction close to each other, and the gap 33 between the two connecting units 32 is reduced. After the larger part of the bottom of the connecting section 30 is completely extended into the second mounting hole unit 29, the two connecting units 32 rebound outward to restore their original state, and are blocked by the shoulder at the connection between the first mounting hole unit 28 and the second mounting hole unit 29 and will not be pulled out of the mounting hole 27 or ejected.

[0042] To facilitate the fixation of the elastic member 24, the present invention is provided with a first fixing cylinder 35 at the bottom of the fixed end 31, wherein the first fixing cylinder 35 and the fixed end 31 are integrally formed, and a second fixing cylinder 36 is provided at the bottom of the second mounting hole unit 29, and the second fixing cylinder 36 and the mounting seat 23 are integrally formed, and the inner diameters of the first fixing cylinder 35 and the second fixing cylinder 36 are equal and coaxial, and the elastic member 24 is a spring, and the two ends of the spring extend into the first fixing cylinder 35 and the second fixing cylinder 36 respectively, and when the fixing seat 25 is pressed downward, the spring is compressed and the spring contracts, and when the fixing seat 25 is released, the spring stretches and returns to its original state, and the fixing seat 25 rebounds.

[0043] The structure of the rest of this embodiment is the same as that of Embodiment 3. For details, please refer to Embodiment 3 and this embodiment will not elaborate on it.

[0044] The parts not specifically described in the above description are all prior art, or can be implemented by prior art. Moreover, the specific implementation cases described in the present invention are only preferred implementation cases of the present invention, and are not used to limit the scope of implementation of the present invention. That is, all equivalent changes and modifications made according to the content of the patent scope of the present invention should be regarded as the technical scope of the present invention.

Claims

1. A three-way valve with filtering function, comprising a valve body (1) and a valve core (2), wherein the valve body (1) comprises a straight-through port (3), a bypass port (4) and a liquid outlet (5), characterized in that: The filter (6) further comprises a first housing (7), a second housing (8), a filter element (9) and a filter membrane (10), wherein the first housing (7) is mounted on the bypass (4) and communicates with the bypass (4), the filter element (9) and the filter membrane (10) are both mounted in the first housing (7) and the filter element (9) is located on a side close to the bypass (4), and the second housing (8) covers the first housing (7) and is used to fix the filter element (9) and the filter membrane (10); The valve core (2) is connected to a handle (11) for rotating the valve core (2), the handle (11) comprising a connection portion (12) fixed to the valve core (2) and three extension rods (13), one end of the extension rod (13) being connected to the connection portion (12), the top of the extension rod (13) being provided with an oblong groove (14) along its length, a plurality of first protrusions (15) and a second protrusion (16) being provided in the groove (14), the second protrusion (16) being located at an end of the groove (14) away from the connection portion (12), and the end of the second protrusion (16) away from the connection portion (12) being in a ">" shape, the length of the first protrusion (15) from one close to the connection portion (12) to one away from the connection portion (12) being in an arithmetic progression, and the distance between two adjacent first protrusions (15) being equal; A first protective cap (18) is detachably provided on the through-hole (3), a second protective cap (19) is detachably provided on the liquid outlet (5), and a third protective cap (22) is detachably provided on an end of the second shell (8) away from the first shell (7); The invention also comprises a positioning device, which comprises a mounting seat (23) fixed on the bypass (4), an elastic member (24) and a fixed seat (25), wherein one end of the fixed seat (25) away from the bypass (4) is provided with a slot (26) for cooperating with the extension rod (13), the elastic member (24) connects the mounting seat (23) and the fixed seat (25), the fixed seat (25) can move relative to the mounting seat (23), and the elastic member (24) contracts when the fixed seat (25) moves relative to the mounting seat (23); The mounting seat (23) is provided with a mounting hole (27), the mounting hole (27) comprising a first mounting hole unit (28) and a second mounting hole unit (29), the first mounting hole unit (28) being located on a side close to the extension rod (13) and communicating with the second mounting hole unit (29), the diameter of the first mounting hole unit (28) being smaller than the diameter of the second mounting hole unit (29), the fixing seat (25) comprising a connecting end (30) and a fixing end (31), the slot (26) being provided on the fixing end (31), the connecting end (30) passing through the first mounting hole unit (28) and extending into the second mounting hole unit (29), the portion of the connecting end (30) located in the second mounting hole unit (29) being larger than the end thereof connected to the fixing end (31); The connecting section (30) comprises two connecting units (32), a gap (33) is left between the connecting units (32), and one end of the connecting unit (32) away from the fixed end (31) is a conical surface (34) with a larger upper end and a smaller lower end; A first fixing tube (35) is arranged at the bottom of the fixing end (31), a second fixing tube (36) is arranged at the bottom of the second mounting hole unit (29), the elastic member (24) is a spring, and two ends of the spring extend into the first fixing tube (35) and the second fixing tube (36) respectively.

2. The three-way valve with filtering function according to claim 1, characterized in that: The first shell (7) has through holes opened along its axial direction, and the through holes include a first through hole, a second through hole and a third through hole which are connected in sequence. The first through hole is used to connect the bypass (4). The diameter of the second through hole is larger than the diameter of the first through hole. The diameter of the third through hole is larger than the diameter of the second through hole. The diameter of the filter element (9) is equal to the diameter of the two through holes and is arranged in the second through hole. The filter membrane (10) is arranged in the third through hole and its diameter is equal to the diameter of the third through hole. The diameter of one end of the second shell (8) used to cover the first shell (7) is equal to the diameter of the second through hole. When the second shell (8) covers the first shell (7), the end of the second shell (8) extends into the third through hole and presses the filter membrane (10).

3. The three-way valve with filtering function according to claim 2, characterized in that: An internal thread is arranged in the first through hole, an external thread is arranged at one end of the second shell (8) covering the first shell (7), and the first shell (7) and the second shell (8) are threadedly matched.

4. The three-way valve with filtering function according to claim 3, characterized in that: An external thread is arranged at the end of the bypass (4), an internal thread is arranged in the first through hole, the bypass (4) extends into the first through hole and the first through hole thread is matched.

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