Drug-resistant tee joint

Abstract

The invention discloses a drug-resistant tee joint, and relates to the technical field of medical instruments. Comprising a main body, a cock is rotatably installed in the main body, a center rod is installed at the center of the cock in a penetrating mode, and the top of the center rod penetrates through the main body and is sleeved with an operation rod; the rotary plug further comprises a center positioning head, the center positioning head is fixed to the outer side of the center rod, the center positioning head slides in side wall cavities at the upper opening and the lower opening of the rotary plug in a limited mode, a first mounting disc and a second mounting disc are arranged at the upper end and the lower end of the rotary plug respectively, and positioning blocks are fixed to the outer side of the first mounting disc and the outer side of the second mounting disc respectively. And the positioning block vertically slides in the cavity of the side wall of the main body in a limited mode, the bottom of the upper connecting rod penetrates through the plug cock to be fixedly provided with a piston plate, and a lower connecting rod is installed at the top of the second installation disc. According to the drug-resistant tee joint, the infusion speed can be adjusted through simple operation, and meanwhile air is prevented from entering the tee joint.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, in particular to a drug-resistant three-way connection. Background Art

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

[0003] The three-way valve is used as a connection between the drug solution and the patient. According to different drug solutions and different tolerance levels of patients, the flow rate needs to be adjusted appropriately. However, the existing three-way valve is not convenient for adjusting the infusion flow rate, and most of them need to use external tools for auxiliary adjustment, which is troublesome to operate and increases the cost. At the same time, when changing or temporarily pausing the infusion, air is easy to enter the external connection head. The existing three-way valve is not convenient for discharging the cavity at the connection head, which easily causes air to enter the interior and affects the safety of infusion.

[0004] In view of the above problems, it is urgent to carry out innovative design based on 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 problem that the existing three-way valve proposed in the above background technology is not convenient for adjusting the infusion flow rate and is not convenient for discharging the cavity at the connecting head. The technical solution of the present invention is aimed at the technical problem that the existing technical solution is too single, and provides a solution that is significantly different from the existing technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a drug-resistant tee, comprising a main body, a plug is rotatably installed in the main body, a center rod is installed through the center of the plug, and an operating rod is installed on the top of the center rod that passes through the main body;

[0007] It also includes a center positioning head, which is fixed to the outside of the center rod, and the center positioning head slides within 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, and the first mounting plate and the second mounting plate are both fixed with positioning blocks on the outside, and the positioning blocks slide vertically within the side wall cavity of the main body, an upper connecting rod is installed at the bottom of the first mounting plate, and a piston plate is fixed to the bottom of the upper connecting rod through the plug, and a lower connecting rod is installed at the top of the second mounting plate, and the top of the lower connecting rod is fixed to the bottom of the plug;

[0008] A pushing assembly is arranged between the first mounting plate, the second mounting plate and the central rod, and is used to realize the respective movement of the first mounting plate and the second mounting plate.

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

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

[0011] Preferably, the top cross-section of the upper connecting rod is designed as a "T"-shaped structure, and the upper connecting rod is embedded in the annular channel at the bottom of the first mounting plate to limit rotation.

[0012] Preferably, the bottom cross-section of the lower connecting rod is designed as a "T"-shaped structure, and the lower connecting rod is embedded in the top annular channel of the second mounting plate to limit rotation.

[0013] Preferably, the pushing assembly includes a movable sleeve, which is located inside the first mounting disk and the second mounting disk, and the movable sleeve is arranged on the center rod. The top of the movable sleeve is rotatably arranged at the bottom of the operating rod, and the bottom of the movable sleeve is rotatably arranged at the bottom inside the main body. A guide head is fixed on the outside 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 disk and the second mounting disk. A pushing positioning head is fixed on the outside of the center rod, and a positioning port is arranged at the movable track of the pushing positioning head, and the positioning port is opened at the end of the movable sleeve.

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

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

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] According to the present invention, when the flow rate needs to be adjusted, the center rod is pressed downward to disengage the center positioning head from the cock, and at the same time, the bottom push positioning head enters the positioning hole on the bottom movable sleeve, and then the operating rod and the center rod are rotated to drive the bottom movable sleeve to rotate by pushing the positioning head and the positioning hole, and then the second mounting plate is driven to move vertically through the guide head and the guide groove, and the cock is driven to move vertically through the lower connecting rod to adjust the overlap area between the external flow port of the cock and the external connecting head channel, so as to achieve flow rate adjustment, and at this time, the rotation of the cock will not be affected, and only its up and down movement will be driven, and its subsequent three-way switching operation will not be affected;

[0018] The present invention, when re-establishing the connection with the external infusion, pulls the center rod upwards to disengage the center positioning head from the stopcock, and at the same time pushes the top positioning head into the positioning port on the top movable sleeve, and then rotates the operating rod and the center rod, and drives the top movable sleeve to rotate by pushing the positioning head and the positioning port, and then drives the first mounting plate to move vertically through the guide head and the guide groove, and drives the piston plate to move vertically in the stopcock by the upper connecting rod to squeeze out the medicine, and then discharge the air in the outer end area of ​​the external connecting tube, and this process will not affect the subsequent three-way switching operation, and on the basis of realizing the basic three-way operation, the flow rate adjustment and air discharge operation can be realized by simple up and down adjustment and rotation, without interfering with each other, and with high practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the front cross-section structure of the present invention;

[0020] Figure 2 For the present invention Figure 1 The enlarged structural diagram at A in the middle;

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

[0022] Figure 4 This is a schematic diagram of the expanded structure of the guide groove of the present invention;

[0023] Figure 5 For the present invention Figure 1 Enlarged structural diagram at B in the middle.

[0024] In the figure: 1. main body; 2. plug; 21. center positioning head; 3. center 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 positioning head; 115. positioning port. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] See also Figure 1-Figure 5The present invention provides a technical solution: a drug-resistant tee, a main body 1, a plug 2, a center positioning head 21, a center 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 push positioning head 114 and a positioning port 115.

[0027] Embodiment 1

[0028] See also Figure 1-Figure 4 A plug 2 is rotatably installed in the main body 1, a center rod 3 is installed through the center of the plug 2, and an operating rod 4 is sleeved on the top of the center rod 3 through the main body 1; a center positioning head 21 is fixed on the outside of the center rod 3, and the center positioning head 21 slides 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, and positioning blocks 7 are fixed on the outside of the first mounting plate 5 and the second mounting plate 6. The positioning block 7 slides vertically in the side wall cavity of the main body 1, and an upper connecting rod 8 is installed at the bottom of the first mounting plate 5. The bottom of the upper connecting rod 8 passes through the plug 2 and is fixed with a piston plate 9;

[0029] The push assembly is arranged between the first mounting plate 5, the second mounting plate 6 and the center rod 3, and the push assembly is used to realize the movement of the first mounting plate 5 and the second mounting plate 6 respectively; an opening is arranged on the outer side of the plug 2 to connect with the external connector, the plug 2 is made of polycarbonate material, and the main body 1 is made of polyamide material; the use of polycarbonate and polyamide can improve its drug resistance and increase the service time, and a sealing ring is sleeved on the center rod 3, and the sealing ring is located at the upper and lower positions of the center positioning head 21, and the sealing ring is located 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 in the annular channel at the bottom of the first mounting plate 5 and limitedly rotates;

[0030] The push assembly includes 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 movable sleeve 111 is rotatably arranged at the bottom of the operating rod 4, and the bottom movable sleeve 111 is rotatably arranged at the bottom inside the main body 1. A guide head 112 is fixed on the outside of the movable sleeve 111, and the guide head 112 is located in a 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 push positioning head 114 is fixed on the outside of the central rod 3, and a positioning port 115 is arranged at the movable track of the push 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 top movable sleeve 111, and the bottom positioning port 115 is located at the top of the top movable sleeve 111;

[0031] When the flow rate needs to be adjusted, the center rod 3 is pressed downward to separate the center positioning head 21 from the plug 2, and the sealing inside the plug 2 is ensured by the sealing ring at the corresponding position. At this time, the bottom push-positioning head 114 enters the positioning port 115 on the bottom movable sleeve 111, and then the operating rod 4 and the center rod 3 are rotated to drive the bottom movable sleeve 111 to rotate by pushing the 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 guide groove 113 of the spiral structure, 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, adjust the overlapping area between the external flow port of the plug 2 and the external connecting head channel, and realize the adjustment of the flow rate.

[0032] Embodiment 2

[0033] Based on Example 1, please refer to Figure 1-Figure 5 A lower connecting rod 10 is installed on the top of the second mounting plate 6, and the top of the lower connecting rod 10 is fixed to the bottom of the cock 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 embedded in the top annular channel of the second mounting plate 6 and rotates in a limited position;

[0034] When establishing a new conveying connection, the center rod 3 is pulled upward to separate the center positioning head 21 from the plug 2, and the sealing inside the plug 2 is ensured by 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 the operating rod 4 and the center rod 3 are rotated to drive the top movable sleeve 111 to rotate by pushing the 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 drives the first mounting plate 5 to move vertically by sliding in the guide groove 113 of the spiral structure. The upper connecting rod 8 drives the piston plate 9 to move vertically in the plug 2, squeezing the internal medicine liquid to the end of the external connecting head, and squeezing out the air that may exist at the end.

[0035] Working principle: When using the drug-resistant tee, first, when the center positioning head 21 is inside the upper and lower ends of the plug 2, by rotating the center rod 3 and the operating rod 4, the opening and closing between the plug 2 opening and the external connecting head can be controlled to realize the three-way delivery of the liquid medicine. When the flow rate needs to be adjusted, the center rod 3 is pressed downward to separate the center positioning head 21 from the plug 2, and the sealing ring at the corresponding position is used to ensure the sealing inside the plug 2. At this time, the bottom push positioning head 114 enters the positioning port 115 on the bottom movable sleeve 111, and then the operating rod 4 and the center rod 3 are rotated to push the positioning head 114 and the positioning port 115 drives the bottom movable sleeve 111 to rotate. Under the limiting effect of the positioning block 7, the movable sleeve 111 drives the guide head 112 to slide in the guide groove 113 of the spiral structure, 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, adjust the overlapping area between the external flow port of the plug 2 and the external connecting head channel, and realize the adjustment of the flow rate. There are multiple matching spaces and positioning ports 115 at the inner walls of the upper and lower cavities of the plug 2 and the center positioning head 21, which are evenly distributed at multiple angles, so that the center rod 3 can be moved up and reset after rotation, and the center positioning head 21 can be kept engaged with the plug 2 again;

[0036] When establishing a new conveying connection, the center rod 3 is pulled upward to separate the center positioning head 21 from the plug 2, and the sealing inside the plug 2 is ensured by 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 the operating rod 4 and the center rod 3 are rotated to drive the top movable sleeve 111 to rotate by pushing the 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 drives the first mounting plate 5 to move vertically by sliding in the guide groove 113 of the spiral structure. The upper connecting rod 8 drives the piston plate 9 to move vertically in the plug 2, squeezing the internal medicine liquid to the end of the external connecting head, squeezing out the air that may exist at the end, and then pressing the center rod 3 to reset, so as to facilitate the subsequent rotation operation of the plug 2.

[0037] The contents not described in detail in this specification belong to the prior art known to the professional and technical personnel in this field. In the description of the present invention, unless otherwise specified, "multiple" means two or more; the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply 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 of the present invention. In addition, the terms "first", "second", "third" and the like 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 limited, the terms "connected" and "connected" 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 ordinary technicians in this field, 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 aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in 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: It 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 bottom of the first mounting plate (5) being installed with an upper connecting rod (8), 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); A pushing assembly is arranged between the first mounting plate (5), the second mounting plate (6) and the central rod (3), and is used to realize the respective movement of the first mounting plate (5) and the second mounting plate (6).

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 center rod (3) is sleeved with a sealing ring, the sealing ring is located at upper and lower positions of the center positioning head (21), and the sealing ring is located at inner and outer positions of the cock (2).

4. The drug-resistant tee according to claim 3, 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.

5. The drug-resistant tee according to claim 4, 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.

6. The drug-resistant tee according to claim 5, characterized in that: The push assembly comprises 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 center rod (3). The top of the movable sleeve (111) is rotatably arranged at the bottom of the operating rod (4), and the bottom of the movable sleeve (111) is rotatably arranged at the bottom of the main body (1). A guide head (112) is fixed to the outside of the movable sleeve (111). The guide head (112) is located in a guide groove (113). The guide groove (113) is formed on the inner wall of the center cavity of the first mounting plate (5) and the second mounting plate (6). A push positioning head (114) is fixed to the outside of the center 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).

7. The drug-resistant tee according to claim 6, characterized in that: The guide head (112) fits and slides in the guide groove (113), and the guide groove (113) is designed as a spiral structure.

8. The drug-resistant tee according to claim 7, characterized in that: 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).

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