Special device for anti-reflux sandwich therapy injection

Abstract

The utility model relates to the technical field of medical instruments, and discloses an anti-reflux sandwich therapy injection special device which comprises a three-way valve, the outer wall of the three-way valve is fixedly connected with a plurality of threaded connectors, the right side of the middle of the inner wall of the three-way valve is fixedly connected with a fixing block, and the outer side of the fixing block is rotationally connected with a sealing ring. A rotating rod is rotationally connected to the inner side of the sealing ring, a torsion spring is fixedly connected to the middle of the outer side of the rotating rod, the other end of the torsion spring is fixedly connected with the sealing ring, a sealing plate is fixedly connected to the outer wall of the torsion spring, and a first bevel gear is rotationally connected to the right side of the inner wall of the three-way valve. According to the three-way valve, the orientation and angle of the one-way valve can be controlled by rotating the clamping block and the gear, multi-angle adjustment of the flow direction of fluid is achieved, the lifting ring is driven by rotating the two-way threaded rod to move to apply pressure to the lifting plate, and the sealing performance of the three-way valve and an injector can be improved.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a special device for sandwich therapy injection for preventing backflow. Background Technology

[0002] Sandwich therapy is a unique treatment method. Like the structure of a sandwich, it is a combination of multiple treatment methods performed in stages. This treatment method is used in many fields. To prevent backflow during the treatment, a special sandwich therapy injection device for anti-backflow is required.

[0003] The sandwich therapy injection device for preventing backflow is an important tool specifically designed for sandwich therapy. During sandwich therapy, it can effectively prevent liquid backflow, ensuring the safety and effectiveness of the treatment. At the same time, it can be easily connected to a syringe, making the injection operation more convenient and accurate.

[0004] Currently available sandwich therapy injection devices connect the syringe and catheter via a three-way valve. However, in actual use, the device's one-way valve cannot be adjusted in real time according to needs, resulting in fluid flow only in one direction without adjustment, thus reducing the device's convenience. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a sandwich therapy injection device for preventing backflow, aiming to improve the problem that existing sandwich therapy injection devices can only allow fluid to flow in one direction and cannot be adjusted.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a sandwich treatment injection device for preventing backflow, comprising a three-way valve, wherein multiple threaded interfaces are fixedly connected to the outer wall of the three-way valve, a fixing block is fixedly connected to the right side of the middle part of the inner wall of the three-way valve, a sealing ring is rotatably connected to the outer side of the fixing block, a rotating rod is rotatably connected to the inner side of the sealing ring, a torsion spring is fixedly connected to the middle of the outer side of the rotating rod, the other end of the torsion spring is fixedly connected to the sealing ring, a sealing plate is fixedly connected to the outer wall of the torsion spring, a first bevel gear is rotatably connected to the right side of the inner wall of the three-way valve, a second bevel gear is rotatably connected to the front side of the inner wall of the three-way valve, the first bevel gear and the second bevel gear are meshed, rotating wheels are rotatably connected to the outer side of the second bevel gear and the inner side of the fixing block, a belt is provided on the outer side of the rotating wheel, and the two rotating wheels are connected by belt drive, a locking block is rotatably connected to the right side of the inner wall of the sealing ring, and a positioning mechanism is provided on the outer side of the three-way valve, the positioning mechanism being used to improve sealing performance.

[0007] As a further description of the above technical solution:

[0008] The positioning mechanism includes multiple slide grooves, which are respectively formed on the upper and lower sides of the outer wall of the three-way valve. A lifting ring is slidably connected to the inner side of each slide groove. U-shaped blocks are fixedly connected to the upper and lower sides of the outer wall of the three-way valve. A slide groove plate is rotatably connected to the outer side of each U-shaped block. A positioning plate is rotatably connected to the outer side of the lifting ring. The outer side of the positioning plate is slidably connected to the slide groove plate. A bidirectional threaded rod is provided on the left side of the three-way valve. The upper and lower sides of the outer wall of the bidirectional threaded rod are respectively threaded to the corresponding bidirectional threaded rod.

[0009] As a further description of the above technical solution:

[0010] Multiple positioning blocks are fixedly connected to the upper and lower sides of the outer wall of the three-way valve, and positioning holes are opened on the outer side of each of the multiple positioning blocks.

[0011] As a further description of the above technical solution:

[0012] The three-way valve has slots on both the upper and lower sides of its inner wall, and a filter screen is fixedly connected to the inner side of the slots.

[0013] As a further description of the above technical solution:

[0014] The three-way valve has handles fixedly connected to both the front and rear sides of its outer wall, and a protective sleeve is fixedly connected to the outside of the handles.

[0015] As a further description of the above technical solution:

[0016] A protective plate is fixedly connected to the left side of the three-way valve, and a knob is rotatably connected to the top of the protective plate. The bottom of the knob passes through the protective plate and is fixedly connected to the bidirectional threaded rod.

[0017] As a further description of the above technical solution:

[0018] A handle is rotatably connected to the right side of the three-way valve, and the outer side of the handle passes through the three-way valve and is fixedly connected to the first bevel gear.

[0019] As a further description of the above technical solution:

[0020] A positioning frame is provided at the bottom front side of the three-way valve, and an observation window is fixedly connected to the inner side of the positioning frame.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, by rotating the locking block to make it contact the sealing plate, the upper fluid can push the sealing plate to rotate, while the lower fluid is prevented from opening due to the restriction of the locking block. When the sealing plate opens, it drives the rotating rod to apply pressure to the torsion spring. When it closes, it is closed by the elastic potential energy. When adjusting the orientation, the locking block is rotated to make its bottom contact the sealing plate. When adjusting the position of the one-way valve, the first bevel gear is rotated to drive the second bevel gear, which drives the rotating wheel to rotate through the belt drive, so that the sealing ring rotates along the fixed block to adjust the position. The orientation and angle of the one-way valve can be controlled, and the fluid flow direction can be adjusted at multiple angles, thereby improving the convenience of the device.

[0023] 2. In this utility model, by rotating the bidirectional threaded rod, the lifting ring is driven to move along the slide groove, thereby causing the positioning plate to move. When the positioning plate slides and rotates, it drives the slide groove plate to move, causing the lifting plate to apply pressure to the inward side. After the three-way valve fixes the syringe with a threaded structure, the lifting plate applies pressure to the syringe, improving its sealing performance with the three-way valve, thereby improving the practicality of the device. Attached Figure Description

[0024] Figure 1 This is a perspective view of a sandwich-shaped therapeutic injection device for preventing backflow, as proposed in this utility model.

[0025] Figure 2 This is a front view of a sandwich-shaped therapeutic injection device for preventing backflow, as proposed in this utility model.

[0026] Figure 3 This is a top view of a sandwich-shaped therapeutic injection device for preventing backflow, as proposed in this utility model.

[0027] Figure 4 This is a split view of the positioning mechanism of a sandwich-style therapeutic injection device for preventing backflow, as proposed in this utility model.

[0028] Figure 5 This is a partial exploded view of a sandwich-style therapeutic injection device for preventing backflow, as proposed in this utility model.

[0029] Legend:

[0030] 1. Three-way valve; 2. Positioning mechanism; 201. Slide groove; 202. Lifting ring; 203. U-shaped block; 204. Slide groove plate; 205. Positioning plate; 206. Bidirectional threaded rod; 3. Threaded interface; 4. Fixing block; 5. Rotating rod; 6. Torsion spring; 7. Sealing plate; 8. First bevel gear; 9. Second bevel gear; 10. Rotating wheel; 11. Belt; 12. Sealing ring; 13. Clamping block; 14. Positioning block; 15. Positioning hole; 16. Clamping groove; 17. Filter screen; 18. Handle; 19. Protective sleeve; 20. Protective plate; 21. Knob; 22. Grip; 23. Positioning frame; 24. Observation window. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Reference Figure 1 , Figure 3 and Figure 5 This utility model provides an embodiment of a sandwich-style therapeutic injection device for preventing backflow, comprising a three-way valve 1, with multiple threaded interfaces 3 fixedly connected to the outer wall of the three-way valve 1, a fixing block 4 fixedly connected to the right side of the middle of the inner wall of the three-way valve 1, a sealing ring 12 rotatably connected to the outer side of the fixing block 4, a rotating rod 5 rotatably connected to the inner side of the sealing ring 12, a torsion spring 6 fixedly connected to the middle of the outer side of the rotating rod 5, the other end of the torsion spring 6 fixedly connected to the sealing ring 12, and a sealing plate 7 fixedly connected to the outer wall of the torsion spring 6. A first bevel gear 8 is rotatably connected to the right side of the inner wall of the three-way valve 1, and a second bevel gear 9 is rotatably connected to the front side of the inner wall of the three-way valve 1. The first bevel gear 8 and the second bevel gear 9 are meshed together. Rotating wheels 10 are rotatably connected to the outer side of the second bevel gear 9 and the inner side of the fixed block 4. A belt 11 is provided on the outer side of the rotating wheel 10. The two rotating wheels 10 are connected to each other by the belt 11. A locking block 13 is rotatably connected to the right side of the inner wall of the sealing ring 12. A positioning mechanism 2 is provided on the outer side of the three-way valve 1. The positioning mechanism 2 is used to improve the sealing performance.

[0033] Specifically, by rotating the locking block 13 so that its upper side contacts the sealing plate 7, the fluid on the upper side will push the sealing plate 7 to rotate, while the fluid on the lower side will be prevented from opening the sealing plate 7 by the restriction of the locking block 13. At the same time, when the sealing plate 7 opens, it will drive the rotating rod 5 to rotate and apply pressure to the torsion spring 6 on it, so that the sealing plate 7 can be closed again by the elastic potential energy when it needs to be closed. When it is necessary to adjust the orientation, simply rotate the locking block 13 180 degrees so that its bottom contacts the sealing plate 7. When it is necessary to adjust the position of the one-way valve to adjust the fluid in different directions, by rotating the first bevel gear 8, the second bevel gear 9 is driven to rotate through meshing transmission. The rotating wheel 10 is driven to rotate through the transmission of the belt 11, thereby driving the sealing ring 12 to rotate along the fixed block 4 to adjust its position.

[0034] Reference Figure 2 , Figure 3 and Figure 4The positioning mechanism 2 includes multiple slide grooves 201, which are respectively opened on the upper and lower sides of the outer wall of the three-way valve 1. A lifting ring 202 is slidably connected to the inner side of the slide groove 201. U-shaped blocks 203 are fixedly connected to the upper and lower sides of the outer wall of the three-way valve 1. A slide plate 204 is rotatably connected to the outer side of the U-shaped blocks 203. A positioning plate 205 is rotatably connected to the outer side of the lifting ring 202. The outer side of the positioning plate 205 is slidably connected to the slide plate 204. A bidirectional threaded rod 206 is provided on the left side of the three-way valve 1. The upper and lower sides of the outer wall of the bidirectional threaded rod 206 are respectively threaded to the corresponding bidirectional threaded rod 206.

[0035] Specifically, by rotating the bidirectional threaded rod 206, the lifting ring 202 is driven to move up and down along the slide groove 201 via the threaded connection. As the lifting ring 202 moves, the positioning plate 205 on it can also move up and down. At this time, through the sliding of the positioning plate 205 along the slide groove plate 204 and its own rotation along the lifting plate 202, the slide groove plate 204 can be moved at the same time, so that the lifting plate 202 can apply pressure inward while moving. In this way, after the three-way valve 1 fixes the syringe through its threaded structure 3, pressure is applied to the syringe to improve the sealing between it and the three-way valve 1.

[0036] Reference Figure 1 , Figure 3 and Figure 5 Multiple positioning blocks 14 are fixedly connected to the upper and lower sides of the outer wall of the three-way valve 1, and positioning holes 15 are opened on the outer side of the multiple positioning blocks 14; slots 16 are opened on the upper and lower sides of the inner wall of the three-way valve 1, and filter screens 17 are fixedly connected to the inner side of the slots 16; handles 18 are fixedly connected to the front and rear sides of the outer wall of the three-way valve 1, and protective sleeves 19 are fixedly connected to the outer side of the handles 18.

[0037] Specifically, by installing threaded parts in the positioning holes 15 on the positioning block 14, the device can be easily installed and fixed. The filter screen 17 in the slot 16 can filter the fluid in the device. The handle 18 makes it easy to hold, carry and store the device, and the protective cover 19 on it can improve the comfort of holding.

[0038] Reference Figure 2 , Figure 3 and Figure 4 A protective plate 20 is fixedly connected to the left side of the three-way valve 1. A knob 21 is rotatably connected to the top of the protective plate 20. The bottom of the knob 21 passes through the protective plate 20 and is fixedly connected to the bidirectional threaded rod 206. A handle 22 is rotatably connected to the right side of the three-way valve 1. The outside of the handle 22 passes through the three-way valve 1 and is fixedly connected to the first bevel gear 8. A positioning frame 23 is provided at the bottom front side of the three-way valve 1. An observation window 24 is fixedly connected to the inner side of the positioning frame 23.

[0039] Specifically, the protective plate 20 can enhance the protection of the bidirectional threaded rod 206, the operation knob 21 can be turned to easily drive the bidirectional threaded rod 206 to rotate, the handle 22 can be used to easily drive the first bevel gear 8 to rotate, and the observation window 24 in the positioning frame 23 can be used to easily observe the operation of the device in real time.

[0040] Working principle: Before using the device, first rotate the locking block 13 so that its upper side contacts the sealing plate 7. At this time, the fluid on the upper side will push the sealing plate 7 to rotate, while on the lower side, due to the restriction of the locking block 13, the fluid will prevent the sealing plate 7 from opening. At the same time, when the sealing plate 7 opens, it will drive the rotating rod 5 to rotate, applying pressure to the torsion spring 6 on it, so that when it needs to be closed, the sealing plate 7 can be closed again with the help of the elastic potential energy. When it is necessary to adjust the orientation, simply rotate the locking block 13 180 degrees so that its bottom contacts the sealing plate 7. When it is necessary to adjust the position of the one-way valve to adjust the fluid in different directions, the first bevel gear 8 can be rotated, which drives the second bevel gear 9 to rotate through meshing transmission, and then drives the rotating wheel 10 to rotate through the transmission of the belt 11, thereby driving the sealing ring 12 to rotate along the fixed block 4, thereby adjusting its position.

[0041] By rotating the bidirectional threaded rod 206, the lifting ring 202 can be driven to move up and down along the slide groove 201 via the threaded connection. As the lifting ring 202 moves, it can simultaneously drive the positioning plate 205 on it to move up and down. At this time, the positioning plate 205 slides along the slide groove plate 204 and rotates along the lifting plate 202. While moving, it can drive the slide groove plate 204 to move, so that the lifting plate 202 can apply pressure to the inside when it moves. In this way, when the three-way valve 1 fixes the syringe through its threaded structure 3, it can apply pressure to the syringe, thereby improving the sealing between it and the three-way valve 1.

[0042] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model 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 make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sandwich-style therapeutic injection device for preventing backflow, comprising a three-way valve (1), characterized in that: The outer wall of the three-way valve (1) is fixedly connected with multiple threaded interfaces (3). A fixing block (4) is fixedly connected to the right side of the middle part of the inner wall of the three-way valve (1). A sealing ring (12) is rotatably connected to the outer side of the fixing block (4). A rotating rod (5) is rotatably connected to the inner side of the sealing ring (12). A torsion spring (6) is fixedly connected to the middle of the outer side of the rotating rod (5). The other end of the torsion spring (6) is fixedly connected to the sealing ring (12). A sealing plate (7) is fixedly connected to the outer wall of the torsion spring (6). A first bevel gear (8) is rotatably connected to the right side of the inner wall of the three-way valve (1). The inner wall of the three-way valve (1) is rotatably connected to a second bevel gear (9). The first bevel gear (8) meshes with the second bevel gear (9). The outer side of the second bevel gear (9) and the inner side of the fixed block (4) are both rotatably connected to rotating wheels (10). A belt (11) is provided on the outer side of the rotating wheel (10). The two rotating wheels (10) are connected by the belt (11). A locking block (13) is rotatably connected to the right side of the inner wall of the sealing ring (12). A positioning mechanism (2) is provided on the outer side of the three-way valve (1). The positioning mechanism (2) is used to improve the sealing performance.

2. The sandwich-style therapeutic injection device for preventing backflow according to claim 1, characterized in that: The positioning mechanism (2) includes multiple slide grooves (201), which are respectively opened on the upper and lower sides of the outer wall of the three-way valve (1). A lifting ring (202) is slidably connected to the inner side of the slide groove (201). U-shaped blocks (203) are fixedly connected to the upper and lower sides of the outer wall of the three-way valve (1). A slide plate (204) is rotatably connected to the outer side of the U-shaped block (203). A positioning plate (205) is rotatably connected to the outer side of the lifting ring (202). The outer side of the positioning plate (205) is slidably connected to the slide plate (204). A bidirectional threaded rod (206) is provided on the left side of the three-way valve (1). The upper and lower sides of the outer wall of the bidirectional threaded rod (206) are respectively threaded to the corresponding bidirectional threaded rod (206).

3. The sandwich-style therapeutic injection device for preventing backflow according to claim 1, characterized in that: The three-way valve (1) has multiple positioning blocks (14) fixedly connected to the upper and lower sides of its outer wall, and positioning holes (15) are opened on the outer side of the multiple positioning blocks (14).

4. The sandwich-style therapeutic injection device for preventing backflow according to claim 1, characterized in that: The inner wall of the three-way valve (1) is provided with slots (16) on both the upper and lower sides, and a filter screen (17) is fixedly connected to the inner side of the slots (16).

5. A sandwich-style therapeutic injection device for preventing backflow according to claim 1, characterized in that: The three-way valve (1) has handles (18) fixedly connected to both the front and rear sides of its outer wall, and a protective sleeve (19) is fixedly connected to the outside of the handles (18).

6. A sandwich-style therapeutic injection device for preventing backflow according to claim 2, characterized in that: A guard plate (20) is fixedly connected to the left side of the three-way valve (1). A knob (21) is rotatably connected to the top of the guard plate (20). The bottom of the knob (21) passes through the guard plate (20) and is fixedly connected to the bidirectional threaded rod (206).

7. A sandwich-style therapeutic injection device for preventing backflow according to claim 1, characterized in that: A handle (22) is rotatably connected to the right side of the three-way valve (1). The outside of the handle (22) passes through the three-way valve (1) and is fixedly connected to the first bevel gear (8).

8. A sandwich-style therapeutic injection device for preventing backflow according to claim 1, characterized in that: The three-way valve (1) has a positioning frame (23) at the bottom front side, and an observation window (24) is fixedly connected to the inner side of the positioning frame (23).

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