A drug-resistant three-way connector

Abstract

The present invention discloses a drug-resistant three-way connector, which relates to the technical field of medical devices. It includes a main body, a plug is rotatably installed in the main body, a central rod is installed through the center of the plug, and an operating rod is sleeved through the top of the central rod and the main body; it also includes a central positioning head, the central positioning head is fixed on the outside of the central rod, and the central positioning head is limited to slide in the side wall cavity at the upper and lower openings of the plug. The upper and lower ends of the plug are respectively provided with a first mounting plate and a second mounting plate, positioning blocks are fixed on the outside of the first mounting plate and the second mounting plate, and the positioning blocks are vertically limited to slide in the side wall cavity of the main body. The bottom of the upper connecting rod passes through the plug and is fixed with a piston plate, and the top of the second mounting plate is provided with a lower connecting rod. This drug-resistant three-way connector can adjust the infusion speed through simple operation and avoid air from entering at the same time.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and specifically relates to a drug-resistant three-way valve. Background Art

[0002] The three-way valve has one inlet and two outlets. By controlling the position of the internal valve core, the liquid can flow out from different outlets. When it is applied to pipeline connection, it can reduce the complexity of the pipeline, so it is widely used in infusion devices. The position of the internal valve core is changed by manually rotating the rotary switch on the three-way valve to realize the change of the liquid flow direction in the three-way valve. However, the existing three-way valves have the following problems:

[0003] As the connection between the liquid medicine and the patient, according to different liquid medicines and different tolerances of the patient, the flow rate needs to be adjusted appropriately. However, the existing three-way valves are not convenient to adjust the infusion flow rate, and mostly need to use external tools for auxiliary adjustment, which is more troublesome to operate and also increases the cost. At the same time, when replacing or temporarily pausing the infusion, air is likely to enter at the external connector. The existing three-way valves are not convenient to discharge the cavity at the connector, and it is easy to cause air to enter the interior, affecting the safety of infusion.

[0004] In view of the above problems, there is an urgent need to innovate and design on the basis of the original three-way valve. Summary of the Invention

[0005] The purpose of the present invention is to provide a drug-resistant three-way valve to solve the problems in the above background art that the existing three-way valves are not convenient to adjust the infusion flow rate and are not convenient to discharge the cavity at the connector. The technical solution of the present invention provides a solution significantly different from the prior art for the technical problem that the prior art solutions are too single.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A drug-resistant three-way valve includes a main body. A plug is rotatably installed in the main body. A central rod is installed through the center of the plug. An operating rod is sleeved on the top of the central rod and penetrates through the main body.

[0007] It further includes a central positioning head. The central positioning head is fixed on the outside of the central rod. The central positioning head is limited to slide in the side wall cavity at the upper and lower openings of the plug. The upper and lower ends of the plug are respectively provided with a first mounting plate and a second mounting plate. Positioning blocks are fixed on the outside of the first mounting plate and the second mounting plate. The positioning blocks are vertically limited to slide in the side wall cavity of the main body. An upper connecting rod is installed at the bottom of the first mounting plate. The bottom of the upper connecting rod penetrates through the plug and is fixed with a piston plate. A lower connecting rod is installed at the top of the second mounting plate. The top of the lower connecting rod is fixed at the bottom of the plug.

[0008] A pushing component, which is arranged between the first mounting disc, the second mounting disc and the central rod, and is used to realize the separate movement of the first mounting disc and the second mounting disc.

[0009] Preferably, an opening is arranged on the outer side of the plug cock and is connected to an external connector. The plug cock is made of polycarbonate material, and the main body is made of polyamide material.

[0010] Preferably, a sealing ring is sleeved on the central rod, and the sealing ring is located at the upper and lower positions of the central positioning head and at the inner and outer positions of the plug cock.

[0011] Preferably, the top cross-section of the upper connecting rod is designed as a "T" - shaped structure, and the upper connecting rod is rotationally limited in an embedded manner in the annular channel at the bottom of the first mounting disc.

[0012] Preferably, the bottom cross-section of the lower connecting rod is designed as a "T" - shaped structure, and the lower connecting rod is rotationally limited in an embedded manner in the annular channel at the top of the second mounting disc.

[0013] Preferably, the pushing component includes a movable sleeve, which is located inside the first mounting disc and the second mounting disc. The movable sleeve is sleeved on the central rod. The top movable sleeve is rotatably arranged at the bottom of the operating rod, and the bottom movable sleeve is rotatably arranged at the bottom inside the main body. A guide head is fixed on the outer side of the movable sleeve, and the guide head is located in a guide groove. The guide groove is opened on the inner wall of the central cavity of the first mounting disc and the second mounting disc. A pushing positioning head is fixed on the outer side of the central rod, and a positioning port is arranged at the movement track of the pushing positioning head. The positioning port is opened at the end of the movable sleeve.

[0014] Preferably, the guide head fits and slides in the guide groove, and the guide groove is designed as a spiral structure.

[0015] Preferably, the positioning port is located at the bottom of the top movable sleeve, and the bottom positioning port is located at the top of the top movable sleeve.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] In the present invention, when the flow rate needs to be adjusted, the central rod is pressed downward, so that the central positioning head is separated from the plug cock. At the same time, the bottom pushing positioning head enters the positioning port on the bottom movable sleeve. Then, the operating rod and the central rod are rotated. The bottom movable sleeve is driven to rotate through the pushing positioning head and the positioning port. Furthermore, the second mounting disc is driven to move vertically through the guide head and the guide groove. The plug cock is driven to move vertically through the lower connecting rod, and the overlapping area between the external flow port outside the plug cock and the channel of the external connector is adjusted to realize the adjustment of the flow rate. At this time, it will not affect the rotation of the plug cock, but only drive its up and down movement, and will not affect its subsequent three - way switching operation;

[0018] In the present invention, when re - establishing a connection with an external infusion, the central rod is pulled upward, causing the central positioning head to disengage from the cock. At the same time, the top push - type positioning head enters the positioning opening on the top movable sleeve. Then, the operating rod and the central rod are rotated. By driving the push - type positioning head and the positioning opening, the top movable sleeve is rotated. Furthermore, through the guide head and the guide groove, the first mounting plate is vertically moved. The piston plate is vertically moved in the cock by the upper connecting rod, squeezing out the liquid medicine, and thus discharging the air in the outer - end area of the external connecting tube. This process will not affect the subsequent three - way switching operation. On the basis of realizing the basic three - way operation, by simple up - and - down adjustment and rotation, the flow - rate adjustment and air - discharging operations can be achieved without interference, and the practicability is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic cross - sectional view of the present invention;

[0020] Figure 2 For the present invention Figure 1 is an enlarged schematic view of part A in the present invention;

[0021] Figure 3 is a schematic bottom - view of the first mounting plate of the present invention;

[0022] Figure 4 is a schematic view of the unfolded guide groove of the present invention;

[0023] Figure 5 For the present invention Figure 1 is an enlarged schematic view of part B in the present invention.

[0024] In the figure: 1, main body; 2, cock; 21, central positioning head; 3, central rod; 4, operating rod; 5, first mounting plate; 6, second mounting plate; 7, positioning block; 8, upper connecting rod; 9, piston plate; 10, lower connecting rod; 111, movable sleeve; 112, guide head; 113, guide groove; 114, push - type positioning head; 115, positioning opening. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] Please refer to Figures 1-5, the present invention provides a technical solution: a drug-resistant three-way joint, including a main body 1, a plug 2, a central positioning head 21, a central rod 3, an operating rod 4, a first mounting plate 5, a second mounting plate 6, a positioning block 7, an upper connecting rod 8, a piston plate 9, a lower connecting rod 10, a movable sleeve 111, a guide head 112, a guide groove 113, a pushing positioning head 114 and a positioning port 115.

[0027] Embodiment 1

[0028] Please refer to Figures 1-4 , a plug 2 is rotatably installed inside the main body 1, a central rod 3 is installed through the center of the plug 2, and the top of the central rod 3 penetrates through the main body 1 and is sleeved with an operating rod 4; a central positioning head 21 is fixed on the outer side of the central rod 3, and the central positioning head 21 is limited to slide in the side wall cavity at the upper and lower openings of the plug 2. The upper and lower ends of the plug 2 are respectively provided with a first mounting plate 5 and a second mounting plate 6. Positioning blocks 7 are fixed on the outer sides of the first mounting plate 5 and the second mounting plate 6, and the positioning blocks 7 are vertically limited to slide in the side wall cavity of the main body 1. An upper connecting rod 8 is installed at the bottom of the first mounting plate 5, and the bottom of the upper connecting rod 8 penetrates through the plug 2 and is fixed with a piston plate 9;

[0029] The pushing assembly is arranged between the first mounting plate 5, the second mounting plate 6 and the central rod 3, and the pushing assembly is used to realize the separate movement of the first mounting plate 5 and the second mounting plate 6; an opening is arranged on the outer side of the plug 2 and is connected to an external connector. The plug 2 is made of polycarbonate material, and the main body 1 is made of polyamide material; by using polycarbonate and polyamide, its drug resistance can be improved and the service time can be increased. A sealing ring is sleeved on the central rod 3, and the sealing ring is located at the upper and lower positions of the central positioning head 21 and at the inner and outer positions of the plug 2; the top cross-section of the upper connecting rod 8 is designed as a "T" - shaped structure, and the upper connecting rod 8 is embedded and limited to rotate in the annular channel at the bottom of the first mounting plate 5;

[0030] The pushing assembly includes a movable sleeve 111, which is located inside the first mounting plate 5 and the second mounting plate 6. The movable sleeve 111 is sleeved on the central rod 3. The upper movable sleeve 111 is rotatably arranged at the bottom of the operating rod 4, and the lower movable sleeve 111 is rotatably arranged at the bottom inside the main body 1. A guide head 112 is fixed on the outer side of the movable sleeve 111, and the guide head 112 is located in the guide groove 113. The guide groove 113 is opened on the inner wall of the central cavity of the first mounting plate 5 and the second mounting plate 6. A pushing positioning head 114 is fixed on the outer side of the central rod 3, and a positioning port 115 is arranged at the moving track of the pushing positioning head 114. The positioning port 115 is opened at the end of the movable sleeve 111; the guide head 112 fits and slides in the guide groove 113, and the guide groove 113 is designed as a spiral structure; the positioning port 115 is located at the bottom of the upper movable sleeve 111, and the bottom positioning port 115 is located at the top of the upper movable sleeve 111;

[0031] When it is necessary to adjust the flow rate, press down the central rod 3, so that the central positioning head 21 is separated from the plug 2, and the seal inside the plug 2 is ensured through the sealing ring at the corresponding position. At this time, the bottom pushing positioning head 114 enters the positioning port 115 on the bottom movable sleeve 111, and then rotate the operating rod 4 and the central rod 3. By driving the bottom movable sleeve 111 to rotate through the pushing positioning head 114 and the positioning port 115, under the limiting action of the positioning block 7, the movable sleeve 111 drives the guide head 112 to slide in the spiral guide groove 113, which can drive the second mounting disc 6 to move vertically, and then drive the plug 2 to move vertically through the lower connecting rod 10, so as to adjust the overlapping area between the external flow port of the plug 2 and the external connector channel, and realize the adjustment of the flow rate.

[0032] Embodiment 2

[0033] On the basis of Embodiment 1, please refer to Figures 1-5 , a lower connecting rod 10 is installed at the top of the second mounting disc 6, and the top of the lower connecting rod 10 is fixed to the bottom of the plug 2; the bottom cross-section of the lower connecting rod 10 is designed as a "T" - shaped structure, and the lower connecting rod 10 is rotationally limited in an embedded manner in the top annular channel of the second mounting disc 6;

[0034] When establishing a new conveying connection, pull up the central rod 3, so that the central positioning head 21 is separated from the plug 2, and the seal inside the plug 2 is ensured through the sealing ring at the corresponding position. At this time, the top pushing positioning head 114 enters the positioning port 115 on the top movable sleeve 111, and then rotate the operating rod 4 and the central rod 3. By driving the top movable sleeve 111 to rotate through the pushing positioning head 114 and the positioning port 115, under the limiting action of the positioning block 7, the movable sleeve 111 drives the guide head 112, and then by sliding in the spiral guide groove 113, it can drive the first mounting disc 5 to move vertically, and the upper connecting rod 8 drives the piston plate 9 to move vertically in the plug 2, squeezing the internal liquid medicine to the end of the external connector and squeezing out the possible air at the end.

[0035] Working principle: When using this drug-resistant three-way valve, first, when the central positioning head 21 is inside the upper and lower ends of the plug 2, by rotating the central rod 3 and the operating rod 4, the opening and closing between the opening of the plug 2 and the external connector can be controlled, realizing the three-way delivery of the liquid medicine. When the flow rate needs to be adjusted, press down the central rod 3 to separate the central positioning head 21 from the plug 2, and ensure the seal inside the plug 2 through the sealing ring at the corresponding position. At this time, the bottom pushing positioning head 114 enters the positioning port 115 on the bottom movable sleeve 111, and then rotate the operating rod 4 and the central rod 3. By driving the bottom movable sleeve 111 to rotate through the pushing positioning head 114 and the positioning port 115, under the limiting action of the positioning block 7, the movable sleeve 111 drives the guide head 112 to slide in the spiral-shaped guide groove 113, which can drive the second mounting plate 6 to move vertically, and then drive the plug 2 to move vertically through the lower connecting rod 10, adjusting the overlapping area between the external flow port of the plug 2 and the channel of the external connector to realize the adjustment of the flow rate. There are multiple equal-angle distribution of the matching spaces between the inner walls of the upper and lower cavities of the plug 2 and the central positioning head 21 and the positioning ports 115, which is convenient for the central rod 3 to move up and reset after rotation, and keep the central positioning head 21 and the plug 2 engaged again;

[0036] When establishing a new delivery connection, pull up the central rod 3 to separate the central positioning head 21 from the plug 2, and ensure the seal inside the plug 2 through the sealing ring at the corresponding position. At this time, the top pushing positioning head 114 enters the positioning port 115 on the top movable sleeve 111, and then rotate the operating rod 4 and the central rod 3. By driving the top movable sleeve 111 to rotate through the pushing positioning head 114 and the positioning port 115, under the limiting action of the positioning block 7, the movable sleeve 111 drives the guide head 112 and then through sliding in the spiral-shaped guide groove 113, which can drive the first mounting plate 5 to move vertically, and the upper connecting rod 8 drives the piston plate 9 to move vertically inside the plug 2, squeezing the liquid medicine inside it to the end of the external connector and squeezing out the possible air at the end. Then press the central rod 3 to reset, which is convenient for subsequent rotation operation of the plug 2.

[0037] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more; the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, terms such as "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A drug-resistant tee, comprising a main body (1), a plug (2) rotatably mounted inside the main body (1), a center rod (3) penetrating the center of the plug (2), and an operating rod (4) sleeved on the top of the center rod (3) passing through the main body (1); Features: The utility model also comprises a center positioning head (21), the center positioning head (21) being fixed on the outside of the center rod (3), the center positioning head (21) sliding in a limited position in the side wall cavity at the upper and lower openings of the plug (2), the first mounting plate (5) and the second mounting plate (6) being respectively provided at the upper and lower ends of the plug (2), the first mounting plate (5) and the second mounting plate (6) being fixed with a positioning block (7) on the outside of each of the first mounting plate (5) and the second mounting plate (6), the positioning block (7) sliding in a limited position vertically in the side wall cavity of the main body (1), the first mounting plate (5) being installed with an upper connecting rod (8) at the bottom, the bottom of the upper connecting rod (8) passing through the plug (2) and being fixed with a piston plate (9), the top of the second mounting plate (6) being installed with a lower connecting rod (10), the top of the lower connecting rod (10) being fixed to the bottom of the plug (2), the center rod (3) being sleeved with a sealing ring, the sealing ring being located at the upper and lower positions of the center positioning head (21), and the sealing ring being located at the inner and outer positions of the plug (2); A push assembly, the push assembly is arranged between the first mounting plate (5) and the second mounting plate (6) and the central rod (3), the push assembly is used to realize the respective movement of the first mounting plate (5) and the second mounting plate (6), the push assembly comprises a movable sleeve (111), which is located in the first mounting plate (5) and the second mounting plate (6), the movable sleeve (111) is sleeved on the central rod (3), the top of the movable sleeve (111) is rotatably arranged on the bottom of the operating rod (4), and the bottom of the movable sleeve (111) is rotatably arranged on the bottom of the main body (1), and a guide head (112) is fixed on the outer side of the movable sleeve (111), and the guide head (112) is located at the guide The guide groove (113) is formed on the inner wall of the central cavity of the first mounting plate (5) and the second mounting plate (6); a push positioning head (114) is fixed on the outer side of the central rod (3); a positioning opening (115) is provided at the movable track of the push positioning head (114); the positioning opening (115) is formed at the end of the movable sleeve (111); the guide head (112) slides in the guide groove (113); the guide groove (113) is designed as a spiral structure; the top positioning opening (115) is located at the bottom of the top movable sleeve (111); and the bottom positioning opening (115) is located at the top of the top movable sleeve (111).

2. The drug-resistant tee according to claim 1, characterized in that: The outer side of the plug (2) is provided with an opening connected to an external connector; the plug (2) is made of polycarbonate material, and the main body (1) is made of polyamide material.

3. The drug-resistant tee according to claim 2, characterized in that: The top cross-section of the upper connecting rod (8) is designed to be a "T"-shaped structure, and the upper connecting rod (8) is embedded in the annular channel at the bottom of the first mounting plate (5) for limited rotation.

4. The drug-resistant tee according to claim 3, characterized in that: The bottom cross-section of the lower connecting rod (10) is designed to be a "T"-shaped structure, and the lower connecting rod (10) is embedded in the top annular channel of the second mounting plate (6) for limited rotation.

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