Disposable triple three-way plug valve

Abstract

The invention provides a disposable triple three-way plug valve which comprises a plug valve assembly and three plug switching mechanisms, and the plug valve assembly comprises a main valve body, three switching pipes and three side branch pipes; wherein the main valve body is communicated with the three switching pipes, and the three side branch pipes are respectively communicated with the outer sides of the three switching pipes; the rotary handle is pressed to drive the three-way groove and the straight-through groove to move through the plunger, so that switching operation of the three-way groove and the straight-through groove is rapidly completed in a pressing mode, the operation efficiency is improved, the cut-off time is effectively shortened, then the rotary handle is rotated to be limited through the limiting mechanism, and the safety is improved. The overall stability of the triple three-way plug valve after the switching operation is completed is ensured; the mixing mechanism is used for guiding the liquid medium converged into the main valve body through the side branch pipe, and the converged medium and the medium flowing in the main valve body are mixed in the guiding process, so that the mixed liquid conveying effect is improved.

Description

Technical Field

[0001] The invention relates to a plug valve, in particular to a disposable three-way three-way plug valve, belonging to the technical field of medical devices. Background Art

[0002] The disposable three-way valve is a medical device commonly used in clinical medicine, especially when multiple liquid medicines need to be infused at the same time. This device is generally composed of a locking joint, a main valve seat, a protective cap, a handle valve and a one-way valve joint; its locking joint and main valve seat are usually made of polycarbonate (PC), the protective cap is made of polycarbonate (PC) or polypropylene (PP), the handle valve is made of polyethylene (PE), and the one-way valve joint is made of polycarbonate (PC) and silicone. The use of these materials ensures the durability and safety of the product. The product will be sterilized with ethylene oxide before use to ensure the safety of single-use.

[0003] The Chinese patent title is A pressure-resistant joint assembly and a triple three-way valve (publication number CN208436252U), which discloses a pressure-resistant joint assembly and a triple three-way valve technology. By adding an inner core that is tightly connected to the Luer outer cone joint and the branch tube respectively, and on the basis of the tight fit connection between the inner core and the branch tube, an adhesive seal is also used to improve the airtightness of each connection, so that the connection between the triple three-way valve and the catheter can withstand the pressure caused by pushing the syringe, providing protection for the operation of angiography; but the switching method between its branch pipe and the main pipe is the same as that of the traditional triple three-way valve, and both need to be controlled by twisting. Not only is the switching efficiency low, but the flow interruption time during the switching process is also long.

[0004] The Chinese patent title is A Disposable Three-Way Three-Piece Valve (publication number CN214248404U), which discloses a disposable three-way three-way technology. By setting a gear switch on the valve stem, when the gear switch drives the valve stem to rotate, the gear switch will have an obvious sense of frustration, so that medical staff can quickly determine the open and closed state of the circuit by the gear switch. However, although the three-way valve has the advantage of improving the convenience of use, it still has the problems of low operating efficiency and long flow interruption time, and the medium that is connected to the main tube through the branch pipe cannot be quickly and effectively mixed, affecting the infusion effect; for this reason, a disposable three-way three-way stopcock valve is proposed. Summary of the invention

[0005] In view of this, the present invention provides a disposable three-way three-way stopcock to solve or alleviate the technical problems existing in the prior art and at least provide a beneficial choice.

[0006] The technical solution of the embodiment of the present invention is implemented as follows: a disposable three-way three-way plug valve, including a plug valve assembly and three plug valve switching mechanisms, wherein the plug valve assembly includes a main valve body, three switching pipes and three side branch pipes;

[0007] The main valve body is connected to the three switching tubes, the three side branches are connected to the outsides of the three switching tubes respectively, the main valve body, the switching tube and the side branches are an integrated structure, the three cock switching mechanisms are respectively installed inside the three switching tubes, a limiting mechanism is provided between the switching tube and the cock switching mechanism, and a mixing mechanism is installed inside the three cock switching mechanisms;

[0008] Wherein, the cock switching mechanism comprises a rotating handle, a plug, a three-way slot and a straight slot;

[0009] Wherein, the three-way groove and the straight groove are both opened on the outer side wall of the plug, the outer side wall of the plug is slidably connected to the inner side wall of the switching tube, and the rotating handle is rotatably connected to the top of the plug;

[0010] Wherein, the limiting mechanism is used to limit the position between the switching tube and the cock switching mechanism;

[0011] Wherein, the mixing mechanism is used to mix the liquid medium introduced into the main valve body through the side branch pipe.

[0012] Further preferably, the cock switching mechanism also includes a storage slot and a spring;

[0013] The storage groove is opened at the bottom of the plug, one end of the spring is fixedly connected to the inner wall of the storage groove, and the other end of the spring is fixedly connected to the bottom of the inner wall of the switching tube.

[0014] Further preferably, the limiting mechanism comprises two limiting plates, a plurality of guide strips, three sealing rings and two limiting ears;

[0015] Among them, the two limiting plates are fixedly connected to the outer wall of the rotating handle, the plurality of guide strips are fixedly connected to the outer wall of the plug, the three sealing rings are sleeved on the outer wall of the plug, the two limiting ears are symmetrically fixedly connected to the top of the switching tube, and the outer walls of the two limiting plates are slidably connected to the inner walls of the two limiting ears respectively.

[0016] Further preferably, one end of the main valve body is threadedly connected to a plug nut, the other end of the main valve body is threadedly connected to a connecting lock, and the end of the connecting lock away from the main valve body is sleeved with a protective cap.

[0017] Further preferably, a handle is fixedly connected to one side of the main valve body, the handle and the main valve body are an integrally formed structure, and one end of the three side branch pipes away from the switching pipe is threadedly connected to a connecting nut.

[0018] Further preferably, the top of the rotating handle is provided with an identification portion, the outer walls of the three switching tubes are threadedly connected to two limit bolts, and one end of the two limit bolts is slidably connected to the inner wall of the plug column.

[0019] Further preferably, the mixing mechanism is composed of two support rings, a plurality of inclined baffles and a plurality of diverter blocks;

[0020] Among them, the two inclined baffles are rotatably connected to the middle part of the inner wall of the three-way groove, a plurality of the inclined baffles are fixedly connected between the two inclined baffles, and a plurality of the diverter blocks are fixedly connected to the inner wall of one of the support rings.

[0021] Further preferably, the mixing mechanism is composed of a guide tube and a plurality of microholes;

[0022] Among them, one end of the guide tube is connected to one end of the side branch pipe, and the other end of the guide tube is fixedly connected to the inner wall of the three-way groove, and a plurality of micropores are opened on the outer wall of the guide tube.

[0023] Further preferably, the mixing mechanism is composed of a guide ring, a plurality of reverse discharge holes and a plurality of diverter strips;

[0024] Among them, the guide ring is fixedly connected to the inner wall of the three-way groove, one side of the guide ring is connected to the side branch pipe, several of the reverse discharge holes are opened at one end of the guide ring close to the input end of the main valve body, several of the diverter strips are fixedly connected to the inner wall of the guide ring, and several of the reverse discharge holes and several of the diverter strips are staggered.

[0025] Further preferably, the mixing mechanism is composed of a three-way liner pipe and a plurality of spiral guide plates;

[0026] Among them, the three-way inner lining pipe is fixedly connected to the inner wall of the three-way groove, one side of the three-way inner lining pipe is connected to the side branch pipe, and several spiral guide plates are fixedly connected to both sides of the inner wall of the three-way inner lining pipe.

[0027] The embodiment of the present invention has the following advantages due to the adoption of the above technical solution:

[0028] 1. The present invention utilizes the plug to drive the movement of the three-way groove and the straight groove by pressing the rotating handle, so as to quickly complete the switching operation of the three-way groove and the straight groove by pressing, thereby improving the operating efficiency and effectively reducing the flow interruption time. Then, the limiting mechanism is used to limit the position by rotating the rotating handle, thereby ensuring the overall stability of the three-way three-way plug valve after the switching operation is completed.

[0029] 2. The present invention uses a mixing mechanism to guide the liquid medium introduced into the main valve body from the side branch pipe, and mixes the introduced medium with the medium flowing in the main valve body during the diversion process, thereby improving the mixed infusion effect.

[0030] The above summary is for illustrative purposes only and is not limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present invention will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 This is a structural diagram of Embodiment 1 of the present invention;

[0033] Figure 2 This is a schematic cross-sectional structure diagram of Embodiment 1 of the present invention from a first viewing angle;

[0034] Figure 3 For the present invention Figure 2 A schematic diagram of the enlarged structure of region A;

[0035] Figure 4 It is a schematic cross-sectional structure diagram of the first embodiment of the present invention from a second viewing angle;

[0036] Figure 5 It is an isometric view of the rotary handle and the plug of the present invention;

[0037] Figure 6 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0038] Figure 7 It is a side view structural schematic diagram of the guide tube of the present invention;

[0039] Figure 8 This is a schematic diagram of the structure of Embodiment 3 of the present invention;

[0040] Fig. 9It is a schematic diagram of the side structure of the guide ring of the present invention;

[0041] Fig.10 This is a schematic diagram of the structure of Embodiment 4 of the present invention;

[0042] Fig.11 It is a schematic structural diagram of the three-way liner pipe and the spiral guide plate of the present invention.

[0043] Figure numerals: 1, plug valve assembly; 2, plug switching mechanism; 3, limit mechanism; 4, mixing mechanism; 101, main valve body; 102, switching pipe; 103, side branch pipe; 201, rotating handle; 202, plug column; 203, three-way groove; 204, straight groove; 205, storage groove; 206, spring; 301, limit plate; 302, guide strip; 303, sealing ring; 304, limit ear ; 401, support ring; 402, inclined baffle; 403, diverter block; 411, guide tube; 412, micropore; 421, guide ring; 422, reverse discharge hole; 423, diverter strip; 431, three-way liner; 432, spiral guide plate; 51, plug nut; 52, connecting lock; 53, protective cap; 54, handle; 55, identification part; 56, connecting nut; 57, limit bolt. DETAILED DESCRIPTION

[0044] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0045] It should be noted that the terms "first", "second", "symmetrical", "array", etc. are only used to distinguish between description and position description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the definition of "first", "symmetrical", etc. can explicitly or implicitly include one or more of these features; similarly, when the number of certain features is not limited in the form of words such as "two" or "three", it should be noted that this feature also explicitly or implicitly includes one or more feature quantities.

[0046] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0047] Embodiment 1

[0048] like Figure 1-Figure 5 As shown, an embodiment of the present invention provides a disposable three-way three-way plug valve, including a plug valve assembly 1 and three plug switch mechanisms 2, wherein the plug valve assembly 1 includes a main valve body 101, three switch pipes 102 and three side branch pipes 103;

[0049] The main valve body 101 is connected to the three switching tubes 102, and the three side branches 103 are respectively connected to the outsides of the three switching tubes 102. The main valve body 101, the switching tube 102 and the side branches 103 are an integrated structure. The three cock switching mechanisms 2 are respectively installed inside the three switching tubes 102. A limiting mechanism 3 is provided between the switching tube 102 and the cock switching mechanism 2. A mixing mechanism 4 is installed inside the three cock switching mechanisms 2.

[0050] The cock switching mechanism 2 includes a rotating handle 201, a plug 202, a three-way groove 203 and a straight groove 204;

[0051] The three-way groove 203 and the straight groove 204 are both formed on the outer wall of the plug 202. The outer wall of the plug 202 is slidably connected to the inner wall of the switching tube 102. The rotary handle 201 is rotatably connected to the top of the plug 202.

[0052] The limiting mechanism 3 is used to limit the position between the switching tube 102 and the cock switching mechanism 2;

[0053] The mixing mechanism 4 is used to mix the liquid medium introduced into the main valve body 101 through the side branch pipe 103 .

[0054] In one embodiment, the cock switching mechanism 2 also includes a storage slot 205 and a spring 206;

[0055] Among them, the storage groove 205 is opened at the bottom of the plug 202, one end of the spring 206 is fixedly connected to the inner wall of the storage groove 205, and the other end of the spring 206 is fixedly connected to the bottom of the inner wall of the switching tube 102. The top of the rotating handle 201 is provided with an identification part 55, and the outer walls of the three switching tubes 102 are threadedly connected to two limit bolts 57, and one end of the two limit bolts 57 is slidably connected to the inner wall of the plug 202.

[0056] The marking portion 55 is used to mark the direction of the rotating handle 201 , and the provided spring 206 is used to reset the plunger 202 pressed into the switching tube 102 .

[0057] In one embodiment, the limiting mechanism 3 includes two limiting plates 301, a plurality of guide strips 302, three sealing rings 303 and two limiting ears 304;

[0058] Among them, the two limit plates 301 are fixedly connected to the outer wall of the rotating handle 201, the plurality of guide strips 302 are fixedly connected to the outer wall of the plug 202, the three sealing rings 303 are sleeved on the outer wall of the plug 202, the two limit ears 304 are symmetrically fixedly connected to the top of the switching tube 102, and the outer walls of the two limit plates 301 are slidably connected to the inner walls of the two limit ears 304 respectively.

[0059] The guide strip 302 guides the moving plug 202 that slides in the switching tube 102, and the sealing ring 303 is used to ensure the sealing between the switching tube 102 and the plug 202. The limiting plate 301 is driven to slide into the guide strip 302 by rotating the rotating handle 201 to limit the plug 202 in the switching tube 102.

[0060] In one embodiment, one end of the main valve body 101 is threadedly connected to a plug nut 51, and the other end of the main valve body 101 is threadedly connected to a connecting lock 52. The end of the connecting lock 52 away from the main valve body 101 is provided with a protective cap 53. A handle 54 is fixedly connected to one side of the main valve body 101. The handle 54 and the main valve body 101 are an integrally formed structure. The ends of the three side branches 103 away from the switching tube 102 are all threadedly connected to connecting nuts 56.

[0061] The connecting nut 56 is used to connect the liquid supply pipeline with the side branch pipe 103;

[0062] The plug nut 51 is used to seal one end of the main valve body 101;

[0063] The connecting lock 52 is used to connect the liquid delivery pipeline and the main valve body 101 .

[0064] In one embodiment, the mixing mechanism 4 is composed of two support rings 401, a plurality of inclined baffles 402 and a plurality of diverter blocks 403;

[0065] The two inclined baffles 402 are rotatably connected to the middle of the inner wall of the three-way groove 203 , a plurality of inclined baffles 402 are fixedly connected between the two inclined baffles 402 , and a plurality of diverter blocks 403 are fixedly connected to the inner wall of a support ring 401 .

[0066] When the liquid medium flows into the three-way groove 203 through the side branch pipe 103, the liquid medium is used to push the inclined baffle 402 to move, and the moving inclined baffle 402 drives the support ring 401 to rotate as a whole. The diverter block 403 is used to improve the stirring effect of the mixing mechanism 4 on the liquid medium.

[0067] When the present invention is in operation: first, the disposable three-way three-way stopcock is connected using the plug nut 51, the connecting lock 52 and the connecting nut 56 according to actual needs. For example, when a syringe needs to be connected, one end of the main valve body 101 is opened by rotating the plug nut 51, and then the syringe is inserted into one end of the main valve body 101 to complete the connection operation. When a contrast catheter or an infusion tube needs to be connected, the protective cap 53 is removed from one end of the connecting lock 52 by moving it, and then the contrast catheter or the infusion tube is connected to one end of the main valve body 101 using the connecting lock 52. When a contrast agent tube, a heparin saline tube, or a pressure measurement tube needs to be connected, it is connected to one end of the side branch tube 103 by using the connecting nut 56.

[0068] When the disposable three-way stopcock needs to be vented or infused, the corresponding side branch tube 103 needs to be opened, the limit plate 301 and the plug 202 are driven to move by pressing the rotating handle 201, and the moving plug 202 drives the guide bar 302, the sealing ring 303, the three-way groove 203, the straight groove 204 and the spring 206 to move, and the moving guide bar 302 guides the moving plug 202 by sliding in the switching tube 102, and the moving spring 206 is compressed by squeezing the inner wall of the switching tube 102, and the moving three-way groove 203 replaces the position of the straight groove 204 to open one end of the side branch tube 103 for convenience. The operation is quickly switched by pressing. The sealing ring 303 is provided to ensure the sealing between the switching tube 102 and the plug 202. The limiting bolt 57 is provided to locate the movement position of the plug 202, so as to quickly determine the pressing guide position of the rotating handle 201 and the plug 202. When the pressing operation is completed, the limiting plate 301 is driven to slide into the guide strip 302 by rotating the rotating handle 201, so as to limit the plug 202 in the switching tube 102. The compressed spring 206 provides a reverse thrust for the plug 202, so as to increase the friction between the limiting plate 301 and the guide strip 302, so as to ensure the overall stability of the triple three-way stopcock.

[0069] In actual operation, the pressing and switching and the limiting operation after switching can also be completed with one hand, such as placing the handle 54 in the palm of your hand, pressing the rotating handle 201 with your thumb and lifting the bottom of the switching tube 102 with your index finger, then using your thumb to quickly press the rotating handle 201 and the plug 202 into the guide position, and then rubbing your thumb to use friction to drive the rotating handle 201 to rotate, and the rotating rotating handle 201 drives the limiting piece 301 to slide into the guide strip 302 to complete the limiting operation, thereby completing the one-hand pressing and switching operation.

[0070] When the liquid medium flows into the three-way groove 203 through the side branch pipe 103, the liquid medium is used to push the inclined baffle 402 to move, and the moving inclined baffle 402 drives the support ring 401 to rotate as a whole, so as to mix the inflowing medium with the medium normally flowing in the main valve body 101, thereby improving the mixed infusion effect. The diverter block 403 is provided to improve the stirring effect of the mixing mechanism 4 on the liquid medium.

[0071] However, although this embodiment can achieve a mixing effect, there are certain requirements on the speed at which the medium in the side branch pipe 103 flows into the three-way groove 203.

[0072] Embodiment 2

[0073] like Figure 1-Figure 7 As shown, an embodiment of the present invention provides a disposable three-way three-way plug valve, including a plug valve assembly 1 and three plug switch mechanisms 2, wherein the plug valve assembly 1 includes a main valve body 101, three switch pipes 102 and three side branch pipes 103;

[0074] The main valve body 101 is connected to the three switching tubes 102, and the three side branches 103 are respectively connected to the outsides of the three switching tubes 102. The main valve body 101, the switching tube 102 and the side branches 103 are an integrated structure. The three cock switching mechanisms 2 are respectively installed inside the three switching tubes 102. A limiting mechanism 3 is provided between the switching tube 102 and the cock switching mechanism 2. A mixing mechanism 4 is installed inside the three cock switching mechanisms 2.

[0075] The cock switching mechanism 2 includes a rotating handle 201, a plug 202, a three-way groove 203 and a straight groove 204;

[0076] The three-way groove 203 and the straight groove 204 are both formed on the outer wall of the plug 202. The outer wall of the plug 202 is slidably connected to the inner wall of the switching tube 102. The rotary handle 201 is rotatably connected to the top of the plug 202.

[0077] The limiting mechanism 3 is used to limit the position between the switching tube 102 and the cock switching mechanism 2;

[0078] The mixing mechanism 4 is used to mix the liquid medium introduced into the main valve body 101 through the side branch pipe 103 .

[0079] The difference from the first embodiment is that the mixing mechanism 4 is composed of a guide tube 411 and a plurality of micro holes 412;

[0080] One end of the guide tube 411 is connected to one end of the side branch pipe 103 , and the other end of the guide tube 411 is fixedly connected to the inner wall of the three-way groove 203 . A plurality of micro holes 412 are provided on the outer wall of the guide tube 411 .

[0081] The rest of the structure is the same as that of the first embodiment.

[0082] When the liquid medium flows into the three-way groove 203 through the side branch pipe 103, the liquid medium is firstly guided by the guide tube 411 and discharged into the three-way groove 203 through the provided micropores 412, so that the medium passing through the micropores 412 can be mixed with the medium entering. Compared with the first embodiment, although the mixing effect of this embodiment is better and the requirement for the flow rate of the medium in the side branch pipe 103 is reduced, the provided guide tube 411 and micropores 412 will block the flow of the liquid medium in the main valve body 101.

[0083] Embodiment 3

[0084] like Figure 1-Figure 9 As shown, an embodiment of the present invention provides a disposable three-way three-way plug valve, including a plug valve assembly 1 and three plug switch mechanisms 2, wherein the plug valve assembly 1 includes a main valve body 101, three switch pipes 102 and three side branch pipes 103;

[0085] The main valve body 101 is connected to the three switching tubes 102, and the three side branches 103 are respectively connected to the outsides of the three switching tubes 102. The main valve body 101, the switching tube 102 and the side branches 103 are an integrated structure. The three cock switching mechanisms 2 are respectively installed inside the three switching tubes 102. A limiting mechanism 3 is provided between the switching tube 102 and the cock switching mechanism 2. A mixing mechanism 4 is installed inside the three cock switching mechanisms 2.

[0086] The cock switching mechanism 2 includes a rotating handle 201, a plug 202, a three-way groove 203 and a straight groove 204;

[0087] The three-way groove 203 and the straight groove 204 are both formed on the outer wall of the plug 202. The outer wall of the plug 202 is slidably connected to the inner wall of the switching tube 102. The rotary handle 201 is rotatably connected to the top of the plug 202.

[0088] The limiting mechanism 3 is used to limit the position between the switching tube 102 and the cock switching mechanism 2;

[0089] The mixing mechanism 4 is used to mix the liquid medium introduced into the main valve body 101 through the side branch pipe 103 .

[0090] The difference from the first embodiment and the second embodiment is that the mixing mechanism 4 is composed of a guide ring 421, a plurality of reverse discharge holes 422 and a plurality of flow dividing strips 423;

[0091] Among them, the guide ring 421 is fixedly connected to the inner wall of the three-way groove 203, one side of the guide ring 421 is connected to the side branch pipe 103, a plurality of reverse discharge holes 422 are opened at one end of the guide ring 421 close to the input end of the main valve body 101, a plurality of diverter strips 423 are fixedly connected to the inner wall of the guide ring 421, and a plurality of reverse discharge holes 422 and a plurality of diverter strips 423 are staggered.

[0092] The rest of the structure is the same as that of the first embodiment.

[0093] When the liquid medium flows into the three-way groove 203 through the side branch pipe 103, the liquid medium is firstly guided by the guide ring 421, and then the liquid medium in the guide ring 421 is discharged in a reverse form through the reverse discharge hole 422 to mix the medium, and the mixed liquid medium is diverted by the provided diverter strip 423 to further mix it. Compared with the first and second embodiments, although this embodiment reduces the mixing effect, it also reduces the demand for the flow rate of the medium in the side branch pipe 103 and the obstruction caused by the liquid medium in the main valve body 101. However, due to the reverse discharge method, there is a certain demand for the pressure of the medium in the side branch pipe 103. If the forward discharge method is adopted, although the demand for the medium pressure can be reduced, the mixing effect will also be affected.

[0094] Embodiment 4

[0095] like Figure 1-Figure 11 As shown, an embodiment of the present invention provides a disposable three-way three-way plug valve, including a plug valve assembly 1 and three plug switch mechanisms 2, wherein the plug valve assembly 1 includes a main valve body 101, three switch pipes 102 and three side branch pipes 103;

[0096] The main valve body 101 is connected to the three switching tubes 102, and the three side branches 103 are respectively connected to the outsides of the three switching tubes 102. The main valve body 101, the switching tube 102 and the side branches 103 are an integrated structure. The three cock switching mechanisms 2 are respectively installed inside the three switching tubes 102. A limiting mechanism 3 is provided between the switching tube 102 and the cock switching mechanism 2. A mixing mechanism 4 is installed inside the three cock switching mechanisms 2.

[0097] The cock switching mechanism 2 includes a rotating handle 201, a plug 202, a three-way groove 203 and a straight groove 204;

[0098] The three-way groove 203 and the straight groove 204 are both formed on the outer wall of the plug 202. The outer wall of the plug 202 is slidably connected to the inner wall of the switching tube 102. The rotary handle 201 is rotatably connected to the top of the plug 202.

[0099] The limiting mechanism 3 is used to limit the position between the switching tube 102 and the cock switching mechanism 2;

[0100] The mixing mechanism 4 is used to mix the liquid medium introduced into the main valve body 101 through the side branch pipe 103 .

[0101] The difference from the first, second and third embodiments is that the mixing mechanism 4 is composed of a three-way liner pipe 431 and a plurality of spiral guide vanes 432;

[0102] Among them, the three-way inner lining pipe 431 is fixedly connected to the inner wall of the three-way groove 203, one side of the three-way inner lining pipe 431 is connected to the side branch pipe 103, and a plurality of spiral guide plates 432 are fixedly connected to both sides of the inner wall of the three-way inner lining pipe 431.

[0103] The rest of the structure is the same as that of the first embodiment.

[0104] When the liquid medium in the main valve body 101 flows into the three-way inner liner 431, the spiral guide plate 432 is used to guide the flowing medium, so that the liquid medium forms a vortex after entering the three-way inner liner 431, so as to use the vortex to mix the liquid medium flowing into the side branch 103, and then the spiral guide plate 432 on the other side of the three-way inner liner 431 is used to guide the mixed medium again to further improve the mixing effect of the liquid medium. Compared with the first embodiment, the second embodiment and the third embodiment, this embodiment effectively reduces the flow rate and pressure requirements of the medium in the side branch 103, and does not cause obstruction to the flowing medium, but affects the stability of the flow of the liquid medium in the main valve body 101.

[0105] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of various changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A disposable three-way three-way plug valve, comprising a plug valve assembly (1) and three plug switching mechanisms (2), characterized in that: The plug valve assembly (1) comprises a main valve body (101), three switching pipes (102) and three side branch pipes (103); The main valve body (101) is connected to the three switching tubes (102), the three side branch tubes (103) are respectively connected to the outsides of the three switching tubes (102), the main valve body (101), the switching tube (102) and the side branch tube (103) are an integrated structure, the three valve switching mechanisms (2) are respectively installed inside the three switching tubes (102), a limiting mechanism (3) is provided between the switching tube (102) and the valve switching mechanism (2), and a mixing mechanism (4) is installed inside the three valve switching mechanisms (2); Wherein, the cock switching mechanism (2) comprises a rotating handle (201), a plug (202), a three-way groove (203) and a straight groove (204); The three-way groove (203) and the straight groove (204) are both formed on the outer wall of the plug (202), the outer wall of the plug (202) is slidably connected to the inner wall of the switching tube (102), and the rotating handle (201) is rotatably connected to the top of the plug (202); The limiting mechanism (3) is used to limit the position between the switching tube (102) and the cock switching mechanism (2); The mixing mechanism (4) is used to mix the liquid medium introduced into the main valve body (101) from the side branch pipe (103).

2. The disposable three-way three-way stopcock according to claim 1, characterized in that: The cock switching mechanism (2) also includes a storage slot (205) and a spring (206); The storage groove (205) is opened at the bottom of the plug (202), one end of the spring (206) is fixedly connected to the inner wall of the storage groove (205), and the other end of the spring (206) is fixedly connected to the bottom of the inner wall of the switching tube (102).

3. The disposable three-way three-way stopcock according to claim 1, characterized in that: The limiting mechanisms (3) each comprise two limiting plates (301), a plurality of guide strips (302), three sealing rings (303) and two limiting ears (304); The two limiting plates (301) are fixedly connected to the outer wall of the rotating handle (201), the plurality of guide strips (302) are fixedly connected to the outer wall of the plug (202), the three sealing rings (303) are sleeved on the outer wall of the plug (202), the two limiting ears (304) are symmetrically fixedly connected to the top of the switching tube (102), and the outer walls of the two limiting plates (301) are slidably connected to the inner walls of the two limiting ears (304) respectively.

4. The disposable three-way three-way stopcock according to claim 1, characterized in that: One end of the main valve body (101) is threadedly connected to a plug nut (51), and the other end of the main valve body (101) is threadedly connected to a connecting lock buckle (52), and one end of the connecting lock buckle (52) away from the main valve body (101) is sleeved with a protective cap (53).

5. The disposable three-way three-way stopcock according to claim 1, characterized in that: A handle (54) is fixedly connected to one side of the main valve body (101), and the handle (54) and the main valve body (101) are an integrally formed structure. One end of the three side branch pipes (103) away from the switching pipe (102) is threadedly connected to a connecting nut (56).

6. The disposable three-way three-way stopcock according to claim 1, characterized in that: The top of the rotating handle (201) is provided with an identification portion (55), and the outer walls of the three switching tubes (102) are threadedly connected with two limit bolts (57), and one end of the two limit bolts (57) is slidably connected to the inner wall of the plug (202).

7. The disposable three-way three-way stopcock according to any one of claims 1 to 6, characterized in that: The mixing mechanism (4) is composed of two support rings (401), a plurality of inclined baffles (402) and a plurality of diverter blocks (403); The two inclined baffles (402) are rotatably connected to the middle of the inner wall of the three-way groove (203), a plurality of the inclined baffles (402) are fixedly connected between the two inclined baffles (402), and a plurality of the diverter blocks (403) are fixedly connected to the inner wall of one of the support rings (401).

8. The disposable three-way three-way stopcock according to any one of claims 1 to 6, characterized in that: The mixing mechanism (4) is composed of a guide tube (411) and a plurality of microholes (412); One end of the guide tube (411) is connected to one end of the side branch pipe (103), the other end of the guide tube (411) is fixedly connected to the inner wall of the three-way groove (203), and the plurality of micropores (412) are all provided on the outer wall of the guide tube (411).

9. The disposable three-way three-way stopcock according to any one of claims 1 to 6, characterized in that: The mixing mechanism (4) is composed of a guide ring (421), a plurality of reverse discharge holes (422) and a plurality of flow dividing strips (423); The guide ring (421) is fixedly connected to the inner wall of the three-way groove (203), one side of the guide ring (421) is connected to the side branch pipe (103), a plurality of reverse discharge holes (422) are opened at one end of the guide ring (421) close to the input end of the main valve body (101), a plurality of diverter strips (423) are fixedly connected to the inner wall of the guide ring (421), and a plurality of reverse discharge holes (422) and a plurality of diverter strips (423) are staggered.

10. The disposable three-way three-way stopcock according to any one of claims 1 to 6, characterized in that: The mixing mechanism (4) is composed of a three-way liner pipe (431) and a plurality of spiral guide plates (432); Among them, the three-way inner lining tube (431) is fixedly connected to the inner wall of the three-way groove (203), one side of the three-way inner lining tube (431) is connected to the side branch pipe (103), and a plurality of spiral guide plates (432) are fixedly connected to both sides of the inner wall of the three-way inner lining tube (431).

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