Swan-gull stop valve

Abstract

The utility model relates to a rotary luer lock valve and belongs to the technical field of connecting valve. It drives the linear motion of the internal slider through the rotation external knob, utilizes the slope on the slider to control the lift of the pressure column, thereby compacts or releases the hose in the valve to realize the reliable on-off of flow path. The utility model effectively reduces the operation torque under high pressure, and the opening and closing are light, the sealing property is good, and still can realize the quick and stable opening and closing flow path under high pressure condition.

Description

Technical Field

[0001] This utility model relates to the field of connection valve technology, and in particular to a rotary Luer stop valve. Background Technology

[0002] With the development of medical fluid connection technology, standardized connection devices based on Luer connectors have emerged. This technology features minimal leakage and reliable connection, leading to the development of various medical connection valve structures, such as two-way valves and three-way valves. Among them, the Luer connector achieves sealing through the mating of male and female conical surfaces, and has been further developed into a threaded locking structure, significantly improving connection stability. It is now widely used in intravenous infusion, blood transfusion, angiography, and pre-filled syringes, providing crucial technical support for the safe delivery and storage of medical fluids.

[0003] In related technologies, two-way valves often employ a rotary switch structure to control the flow path. In high-pressure applications, to ensure sealing performance, it is usually necessary to increase the knob torque to ensure tight valve closure, which places higher demands on valve body structural design, material strength, and manufacturing precision.

[0004] However, the aforementioned rotary switch-type Luer connection valve has problems such as excessive operating torque and low opening and closing efficiency under high pressure conditions, which not only increases the difficulty of operation, but also limits its applicability and reliability in high-pressure infusion or imaging scenarios.

[0005] Therefore, there is an urgent need for a Luer stop valve structure that can achieve rapid and stable opening and closing of the flow path even under high pressure conditions. Utility Model Content

[0006] In response to the shortcomings of the existing production technology, the applicant provides a rotary Luer stop valve that can ensure the valve body can be opened and closed even under high pressure inside the valve.

[0007] The technical solution adopted in this utility model is as follows: A rotary Luer stop valve, comprising: The valve body has a hose channel extending along its length inside. The top of the valve body is provided with a switch guide rail. The top of the hose channel is provided with a through hole. One end of the switch guide rail is provided with a buckle, and the other end is provided with a stop block. A switch assembly includes a slider body, the inner wall of which is provided with a sliding protrusion that mates with the switch guide rail, and the outer surface is provided with a threaded groove; the slider body is provided with a downward inclined ramp between its two ends in the length direction, and a positioning groove is provided on one side of the ramp; A knob assembly, sleeved on the outside of the switch assembly, includes a knob body and at least one protrusion on its inner wall, the protrusion being embedded in the threaded groove; A pressure column is located between the valve body and the switch assembly. Its top is an arc-shaped structure that abuts against the slope, and its bottom penetrates the through hole and contacts the hose in the hose channel. A flexible hose is provided within the hose channel; The retaining ring includes a first end and a second end, wherein the first end of the retaining ring is press-fitted with the inner wall of the hose, and the second end of the retaining ring is press-fitted with the inner wall of the hose channel.

[0008] As a further improvement to the above technical solution: In one embodiment, a locking assembly is also included, which includes a locking body and a locking groove on its top, the locking groove engaging with the locking mechanism.

[0009] In one embodiment, one end of the knob assembly is limited by the stop, and the other end is limited by the latch body.

[0010] In one embodiment, the side of the ramp adjacent to the stop is higher in the vertical direction than the side of the ramp adjacent to the latch body.

[0011] In one embodiment, the outer diameter of the first end of the retaining ring is smaller than the outer diameter of the second end of the retaining ring.

[0012] In one embodiment, when the knob body rotates, the slider body is driven to move linearly along the length of the switch guide rail through the cooperation between the protrusion and the threaded groove.

[0013] In one embodiment, when the slider body moves toward the stop, the pressure column moves down the slope to press the hose to close the flow path.

[0014] In one embodiment, the top of the pressure column enters the positioning groove, and the hose is in a fully closed state.

[0015] In one embodiment, when the slider body moves away from the stop, the pressure column moves up the slope, releasing the pressure on the hose, and the hose returns to a flow-through state.

[0016] In one embodiment, the hose is made of an elastic material that can return to its original shape after the pressure column is disengaged.

[0017] The beneficial effects of this utility model are as follows: This utility model has a compact structure. Based on the rotational motion of the knob assembly, the linear motion of the slider is converted into the linear motion of the slider through the cooperation of the protrusion and the threaded groove. It makes great use of mechanical advantages. Only a small rotational torque needs to be applied, which can be amplified and converted into a sufficiently large linear pressure in the vertical direction through the ramp structure to close the hose. This fundamentally solves the problem that traditional knob valves require a large torque to ensure a seal under high pressure, making the opening and closing operation under high pressure conditions easy and fast.

[0018] This utility model also has the following advantages: The arc-shaped structure at the top of the pressure column of this invention, in conjunction with the ramp on the slider, makes the clamping process a gradual linear process rather than a sudden impact clamping. This clamping method can ensure that a sufficiently large and uniform clamping force is generated in the closed position to achieve a reliable seal, while avoiding the instantaneous excessive pressure from cutting or causing permanent damage to the hose structure and indentation, thus extending the service life of the hose. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0020] Figure 2 This is a schematic diagram of the overall structure of the present invention under an explosive state.

[0021] Figure 3 This is a cross-sectional view of the present invention in the open state.

[0022] Figure 4 This is a cross-sectional view of the switch assembly of this utility model.

[0023] Figure 5 This is a cross-sectional view of the present invention in the closed state.

[0024] Among them: 100, valve body; 200, knob assembly; 300, locking assembly; 400, switch assembly; 500, pressure column; 600, hose; 700, retaining ring; 101. Hoses; 102. Switch rail; 103. Through hole; 104. Clip; 105. Stop; 201. Knob body; 202. Protrusion; 301. Lock body; 302. Buckle groove; 401. Slider body; 402. Sliding protrusion; 403. Threaded groove; 404. Ramp; 405. Position groove; 701. First end of the retaining ring; 702. Second end of the retaining ring. Detailed Implementation

[0025] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0026] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0028] When using the terms “including,” “having,” and “comprising” as described herein, another component may be added unless explicitly qualifying terms such as “only,” “consisting of,” etc. are used. Unless otherwise stated, singular terms may include plural forms and should not be construed as having a quantity of one.

[0029] It should be understood that although the terms "first," "second," etc., may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from another. For example, without departing from the scope of this invention, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element.

[0030] Furthermore, the accompanying drawings are not drawn to a 1:1 scale, and the relative dimensions of the components are shown in the drawings only as examples and not necessarily to actual scale.

[0031] like Figures 1-5 The accompanying drawing shows a schematic diagram of the structure of a rotary Luer stop valve according to an embodiment of the present invention; for ease of description, the drawing only shows the structure related to the embodiment of the present invention.

[0032] This application provides a rotary Luer stop valve that converts the rotational motion of the knob assembly 200 into the precise linear motion of the switch assembly 400, and then controls the pressing and releasing of the pressure column 500 on the hose 600 through an inclined plane mechanism, ultimately realizing the on / off control of the flow channel.

[0033] See Figures 1 to 5 The rotary Luer stop valve includes a valve body 100, a knob assembly 200, a locking assembly 300, a switch assembly 400, a pressure rod 500, a hose 600, and a retaining ring 700.

[0034] In some embodiments, the valve body 100 has a hose channel 101 extending along its length inside for accommodating the hose 600. A switch guide rail 102 is provided on the top of the valve body 100. This guide rail is used to provide precise guidance and limit for the linear movement of the switch assembly 400. In the vertical direction, a through hole 103 is provided at the top of the hose channel 101; At one end of the switch guide rail 102 along its length, there is a buckle 104, and at the other end, there is a stop 105; The latch 104 is used to cooperate with the locking assembly 300 to limit one end of the knob assembly 200, while the stop 105 is used to limit the other end of the knob assembly 200.

[0035] In some embodiments, the switch assembly 400 includes a slider body 401; in this embodiment, the body has a semi-cylindrical structure to fit the internal space of the valve body 100.

[0036] Furthermore, a sliding protrusion 402 is provided on the inner wall of the slider body 401 (i.e. the side facing the switch guide rail 102). The sliding protrusion 402 forms a sliding pair with the switch guide rail 102 on the valve body 100, ensuring that the slider body 401 can only make stable linear movements along the length of the guide rail, and cannot rotate. A threaded groove 403 is provided on the outer surface of the slider body 401; More importantly, a downward-sloping ramp 404 is provided between the two opposite ends of the slider body 401 along its length. A positioning groove 405 is provided at the end of the ramp 404; Furthermore, the side of the ramp 404 adjacent to the stop 105 is higher in the height direction than the side of the ramp 404 adjacent to the locking body 301; the ramp 404 is used to convert the linear displacement in the horizontal direction into the displacement of the pressure column 500 in the height direction, while the positioning groove 405 is used to accommodate the top of the pressure column 500 in the closed position, providing a clear sense of positioning and stable positioning.

[0037] In some embodiments, the knob assembly 200 is sleeved outside the switch assembly 400, and it includes a manually rotatable knob body 201; On the inner wall of the knob body 201, there is at least one inwardly protruding protrusion 202; the protrusion 202 is embedded and locked in the threaded groove 403 of the switch assembly 400.

[0038] When the operator rotates the knob body 201, the protrusion 202 is restricted within the threaded groove 403. The rotation of the knob forces the slider body 401 to be unable to rotate due to the cooperation between the sliding protrusion 402 and the switch guide rail 102. It can only move linearly along the length of the switch guide rail 102, thus realizing the motion conversion of "rotation-linear".

[0039] In some embodiments, the pressure column 500 is disposed between the valve body 100 and the switch assembly 400 and is a component that directly performs the on / off action. Its top is designed with an arc surface structure, which is always in contact with the surface of the ramp 404 on the switch assembly 400, and its bottom extends through the through hole 103 on the valve body 100 into the hose channel 101, where it contacts the outer wall of the hose 600. The function of the pressure column 500 is to convert the mechanical motion transmitted from the ramp 404 into a vertical clamping force on the hose 600.

[0040] In some embodiments, the hose 600 is made of a highly elastic medical-grade material (such as silicone), and the hose 600 is disposed in the hose channel 101 of the valve body 100, serving as a channel through which fluid flows.

[0041] In some embodiments, the retaining ring 700 is used to fix the position of the hose 600 in the hose channel 101 to prevent it from being pushed out by pressure or from being displaced. Furthermore, the retaining ring 700 has two opposite ends in the longitudinal direction: a first retaining ring end 701 and a second retaining ring end 702; wherein the outer diameter of the first retaining ring end 701 is designed to be smaller than the outer diameter of the second retaining ring end 702. During assembly, the first retaining ring end 701 is inserted into the hose 600 and forms an interference fit with its inner wall; the second retaining ring end 702 forms an interference fit with the inner wall of the hose channel 101, ensuring a firm connection and reliable sealing.

[0042] In some embodiments, the locking assembly 300 is used to close the valve body 100 from one side and fix the knob assembly 200. It includes a locking body 301 with a snap-fit ​​groove 302 on its top. During assembly, the snap-fit ​​104 on the valve body 100 engages with this snap-fit ​​groove 302, achieving a reliable connection between the locking assembly 300 and the valve body 100. Simultaneously, the inner wall of the locking body 301 forms an axial limit on the end of the knob assembly 200, working in conjunction with the stop 105 at the other end of the valve body 100 to prevent the knob assembly 200 from moving axially.

[0043] The working principle of this utility model is as follows: See Figure 3Open state: At this time, the knob assembly 200 is in the loose position, and the slider body 401 of the switch assembly 400 is located at the end away from the stop block 105 under the action of the knob; the top arc surface of the pressure column 500 is at the higher position of the ramp 404, so the pressure of the bottom of the pressure column 500 on the hose 600 is minimal or zero, and the hose 600 returns to its original shape under its own elasticity, the flow channel is unobstructed, and the fluid can pass through freely; Closing Process: When it is necessary to close the flow path, rotate the knob assembly 200. The inner wall protrusion 202 of the knob body 201 moves within the threaded groove 403, driving the slider body 401 of the switch assembly 400 along the switch guide rail 102 towards the stop 105 (i.e., Figure 5 (In the direction shown) the slider body 401 moves in a straight line; as the slider body 401 moves, the arc surface at the top of the pressure column 500 slides along the downward slope 404, forcing the pressure column 500 to move downward (i.e. towards the hose 600), and the bottom of the pressure column 500 gradually presses the hose 600, causing it to deform and collapse, thereby closing the flow channel.

[0044] See also Figure 5 When rotated to the end point, the top of the pressure column 500 falls precisely into and abuts against the positioning groove 405 at the end of the ramp 404. At this point, the operator can feel a clear sense of positioning, the hose 600 is fully compressed, and the flow channel is completely and reliably sealed.

[0045] Reopening process: When it is necessary to reopen the flow path, rotate the knob assembly 200 counterclockwise. The knob body 201 drives the slider body 401 away from the stop 105 via the protrusion 202 (i.e., Figure 3 The pressure column 500 moves in a straight line (as shown); the top of the pressure column 500 moves upward along the slope 404, gradually relieving its pressure on the hose 600. Once the pressure is relieved, the flattened hose 600 automatically rebounds due to the elasticity of its material, restoring the circular channel, allowing fluid to pass through again.

[0046] In summary, the present invention has a reasonable structure. Based on the rotational movement of the knob assembly 200, the movement is converted into the linear movement of the slider body 401 through the cooperation of the protrusion 202 and the threaded groove 403. Furthermore, the linear movement of the slider body 401 is converted into the movement of the pressure column 500 in the height direction through the ramp 404, thereby realizing the opening or closing of the hose 600. This provides a rotary Luer stop valve that can achieve rapid and stable opening and closing of the flow path under high pressure conditions.

[0047] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0048] The embodiments described above merely illustrate the implementation of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A rotary Luer stop valve, characterized in that, include: The valve body (100) has a hose channel (101) extending along the length direction inside. The valve body (100) has a switch guide rail (102) on the top. The hose channel (101) has a through hole (103) on the top. The switch guide rail (102) has a buckle (104) at one end and a stop block (105) at the other end. The switch assembly (400) includes a slider body (401), the inner wall of which is provided with a sliding protrusion (402) that cooperates with the switch guide rail (102), and the outer surface is provided with a threaded groove (403); the slider body (401) is provided with a downward inclined ramp (404) between its two ends in the length direction, and a positioning groove (405) is provided on one side of the ramp (404). A knob assembly (200) is sleeved on the outside of the switch assembly (400), including a knob body (201) and at least one protrusion (202) on its inner wall, the protrusion (202) being embedded in the threaded groove (403); A pressure column (500) is located between the valve body (100) and the switch assembly (400). Its top is an arc-shaped structure that abuts against the ramp (404), and its bottom penetrates the through hole (103) and contacts the hose (600) in the hose channel (101). A flexible hose (600) is disposed within the flexible hose channel (101); The retaining ring (700) includes a first end (701) and a second end (702), wherein the first end (701) is in interference fit with the inner wall of the hose (600), and the second end (702) is in interference fit with the inner wall of the hose channel (101).

2. The rotary Luer stop valve according to claim 1, characterized in that, It also includes a locking assembly (300), which includes a locking body (301) and a snap-fit ​​groove (302) on its top, the snap-fit ​​groove (302) engaging with the snap (104).

3. The rotary Luer stop valve according to claim 2, characterized in that, One end of the knob assembly (200) is limited by the stop (105), and the other end is limited by the latch body (301).

4. The rotary Luer stop valve according to claim 1, characterized in that, The side of the ramp (404) adjacent to the stop (105) is higher in the vertical direction than the side of the ramp (404) adjacent to the locking body (301).

5. The rotary Luer stop valve according to claim 1, characterized in that, The outer diameter of the first end (701) of the retaining ring is smaller than the outer diameter of the second end (702) of the retaining ring.

6. The rotary Luer stop valve according to claim 1, characterized in that, When the knob body (201) rotates, the slider body (401) is driven to move linearly along the length direction of the switch guide rail (102) through the cooperation of the protrusion (202) and the threaded groove (403).

7. The rotary Luer stop valve according to claim 1, characterized in that, When the slider body (401) moves toward the stop (105), the pressure column (500) moves down along the slope (404) to press the hose (600) to close the flow path.

8. The rotary Luer stop valve according to claim 7, characterized in that, The top of the pressure column (500) enters the positioning groove (405), and the hose (600) is in a fully closed state.

9. The rotary Luer stop valve according to claim 1, characterized in that, When the slider body (401) moves away from the stop (105), the pressure column (500) moves up along the slope (404), releases the pressure on the hose (600), and the hose (600) returns to the flow state.

10. The rotary Luer stop valve according to claim 1, characterized in that, The hose (600) is made of an elastic material and is able to return to its original shape after the pressure column (500) is disengaged.

Images