Self-sealing integrated urine collector based on multi-stage retention chamber

Abstract

The invention discloses a self-sealing integrated urine collector based on a multi-stage retention chamber, and belongs to the technical field of clinical examination and test equipment. The self-sealing integrated urine collector based on the multi-stage retention chamber comprises a collection cup, a damping plug and a test tube, an axial positioning pin extending axially is arranged on the inner wall of the fixing sleeve and forms an anti-rotation structure with a positioning opening of the test tube, so that displacement of the damping plug caused by rotation of the test tube after assembly is avoided; the damping plug is internally provided with a three-stage stepped volume increasing retention area which is tightly connected to the liquid inlet pipe in a sleeving mode and communicated with the liquid inlet pipe through a flow guide groove, a liquid pipeline multi-time reducing structure is formed, and linear accumulation of resistance coefficients is achieved. The technical problems that the size of the air guide pipe is limited, the valve plate is prone to failure and sealing is not reliable are solved, and urine collection which is free of valve plate self-sealing, accurate in quantification, convenient and fast to operate, safe and reliable is achieved.

Description

Technical Field

[0001] This invention relates to the field of clinical laboratory testing equipment technology, specifically to a self-sealing integrated urine collector based on a multi-stage retention chamber. Background Technology

[0002] In clinical urine testing, hospitals typically provide patients with an open urine cup and a dedicated test tube. The patient collects urine using the open cup, transfers the sample to the tube, caps it, and sends it for testing. This method has the following drawbacks: ① Patients cannot easily control the amount of urine collected; if the amount is too small, it will not meet the testing requirements. ② It is prone to contamination; urine can easily get on the patient's hands, the floor, or the outer wall of the container. Used urine cups are often left scattered, polluting the environment. ③ It is inconvenient to operate and unsuitable for patients with limited mobility.

[0003] Chinese patent CN121015238A discloses an integrated urine collector, but this collector has the following defects: ① The air guide tube is located on the one-way valve. Due to the limited length and manufacturing diameter of the air guide tube of the one-way valve, the resistance to liquid flow cannot be effectively adjusted; ② The female buckle of the fixing sleeve can rotate freely after it is engaged with the male buckle of the test tube. Since the sealing ring of the one-way valve is in close contact with the test tube, the rotation of the test tube will drive the one-way valve to move in the inlet tube, which seriously affects the fit between the valve plate and the inlet tube; Both of the above problems will cause the valve plate to fail to close when the liquid reaches the one-way valve, resulting in the liquid flowing out of the test tube, polluting the environment and causing sampling failure; ③ The valve plate has high requirements for the material of the one-way valve and high processing precision; ④ Positioning assembly is required during assembly; All of the above problems will reduce the quality and efficiency of production.

[0004] Based on this situation, a self-sealing integrated urine collector based on multi-stage retention chambers is provided, including a collection cup, a damping plug, and a test tube. The inner wall of the fixing sleeve is provided with an axially extending axial positioning pin, which forms an anti-rotation structure with the positioning port of the test tube, preventing the damping plug from shifting due to the rotation of the test tube after assembly. The damping plug has a three-stage stepped retention zone with increasing volume, which is connected by a guide groove to form a liquid pipeline with multiple diameter changes, realizing the linear accumulation of the resistance coefficient. This invention solves the technical problems of limited air tube size, easy valve failure, and unreliable sealing, and realizes valve-free self-sealing, accurate quantification, convenient operation, and safe and reliable urine collection. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the technical solution provided by the present invention is as follows: According to an embodiment of the present invention, a self-sealing integrated urine collector based on multi-stage retention chambers includes a collection cup, a damping plug, and a test tube. The collection cup is provided with an inlet tube inside a fixed sleeve. The damping plug is sleeved on the inlet tube. The inlet tube is provided with a guide groove, which connects the inner and outer spaces of the test tube with multiple retention chambers. The inner wall of the fixed sleeve is provided with an axially extending axial positioning pin.

[0006] The collection cup consists of a cup body, a fixing sleeve, an inlet tube, a female buckle, an overflow port, and the axial positioning pin. The fixing sleeve is cylindrical and is located in the lower part of one outer side wall of the cup body, extending outward and downward. The inner wall of the fixing sleeve at the end away from the cup body is provided with a radially grooved female buckle. The axial positioning pin is located on the inner wall of the fixing sleeve at the end near the cup body and is spaced apart from the female buckle. An overflow port is provided at the upper end of the cup body opposite to the fixing sleeve.

[0007] Furthermore, the inlet pipe is cylindrical and located inside the fixed sleeve. The outer wall of the end of the inlet pipe away from the fixed sleeve is provided with a straight concave guide groove. The end of the inlet pipe near the fixed sleeve is provided with limiting posts, which are symmetrically distributed on the outer wall of the inlet pipe as installation limiting devices for the damping plug. The centerline of the inlet pipe and the centerline of the fixed sleeve are collinear, and the angle α between the centerline of the fixed sleeve and the horizontal plane of the upper opening of the cup body is 15°~50°.

[0008] Furthermore, the axial positioning pins are located on the inner wall of the fixed sleeve, arranged symmetrically, and the top shape is similar to the shape of the test tube positioning port. During assembly, the test tube is quickly positioned by engaging the axial positioning pins with the bevel of the tube opening, achieving assembly without the need for positioning. During disassembly, the test tube is rotated, and the top of the axial positioning pins engages with the bevel of the test tube opening, easily separating the test tube from the collection cup.

[0009] The damping plug is cylindrical and consists of a plug body, a sealing ring, and retention areas. The plug body has multiple retention areas inside. The damping plug is sleeved on the inlet pipe and is collinear with the center line of the inlet pipe. The sealing ring is interference-fitted with the inner wall of the test tube to form a seal and physically separates the test tube into two spaces, the inside and the outside. The inner wall of the plug is tightly fitted with the outer wall of the inlet pipe, so that the multiple retention areas become multiple independent retention chambers. The inner and outer spaces of the test tube and the multiple retention chambers are connected by a guide channel.

[0010] The stagnation chamber has a circular or elliptical cross-section and is a three-stage stepped volume-increasing structure, arranged sequentially from small to large. The fluid undergoes a step-like attenuation at the junction of the variable diameter, achieving a linear accumulation of the drag coefficient.

[0011] The axial positioning pin is an axially extending convex structure with a trapezoidal or arc-shaped cross-section, and its length is equal to the depth of the test tube positioning port.

[0012] The test tube has a positioning port at the upper end of the test tube opening. The positioning port is arranged radially symmetrically at two vertices of the test tube opening, dividing the test tube into four equal parts. The connection between the vertices and the positioning port is an inclined plane, which serves as a rotation guide structure for the test tube. The positioning port slides with the axial positioning pin, and a male and female fastener are added to form an anti-rotation structure. The male fastener has radially symmetrically arranged vents.

[0013] Furthermore, the female buckle and the male buckle are connected by a snap-fit ​​structure. By rotating the test tube, the inclined surface of the test tube engages with the axial positioning pin, forcing the male buckle to disengage from the female buckle, thereby separating the test tube from the collection cup after collection.

[0014] The advantages of this invention compared to the prior art are: 1. The valve plate structure of the traditional one-way valve has been eliminated. Instead, a multi-stage retention chamber in the damping plug is connected by a guide channel. When the liquid fills the guide channel, a vortex is formed in the retention chamber, which generates energy dissipation and significantly reduces the flow rate. After sampling, the liquid in the inlet pipe, the liquid in the guide channel, and the sealing ring cooperate with each other to achieve dynamic self-sealing by relying solely on the surface tension of the liquid and geometric constraints without the addition of additional sealing components. This eliminates failure modes such as valve plate deformation, adhesion, and assembly misalignment, and significantly improves the reliability of long-term use. 2. The flow guide of the collection cup is connected to the retention chamber in the damping plug. The retention chamber adopts a three-stage stepped volume increasing structure, set from small to large. The flow velocity decreases in a step at the junction of the diameter change, realizing the linear accumulation of the resistance coefficient. Compared with the continuous thin tube method, the multiple diameter change method has a significant effect on increasing resistance, which can effectively prevent the liquid from continuing to flow into the test tube and realize accurate quantitative collection. 3. The valveless design eliminates the mechanical delay of valve opening and closing, thereby increasing the liquid inlet speed and accelerating the sampling speed; 4. The inlet pipe is changed to a cylindrical shape, eliminating the need for positioning during assembly and enabling rapid installation; at the same time, the cylindrical inlet pipe, combined with the straight guide groove, significantly reduces the processing difficulty of the injection mold, which is conducive to large-scale stable production and improves production efficiency. 5. The axial positioning pin on the fixed sleeve and the bevel of the test tube opening form an anti-rotation structure to prevent the test tube from driving the damping plug to rotate during collection and transportation, ensuring the fitting accuracy between the damping plug and the liquid inlet tube and improving the sealing reliability. 6. During the machine testing, when the test tube is rotated out, the sealing ring acts as a piston, drawing the liquid in the inlet tube into the test tube, thus avoiding secondary contamination. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the self-sealing integrated urine collector based on a multi-stage retention chamber according to the present invention; Figure 2 This is a cross-sectional view of the self-sealing integrated urine collector based on a multi-stage retention chamber according to the present invention; Figure 3 This is a partially enlarged cross-sectional view of the self-sealing integrated urine collector based on a multi-stage retention chamber according to the present invention. Figure 4 This is a schematic diagram of the collection cup of the self-sealing integrated urine collector based on a multi-stage retention chamber according to the present invention; Figure 5 This is a schematic diagram of the damping plug of the self-sealing integrated urine collector based on a multi-stage retention chamber according to the present invention; Figure 6 This is a schematic diagram of the test tube structure of the self-sealing integrated urine collector based on a multi-stage retention chamber according to the present invention; Figure 7 This is a cross-sectional view of the damping plug of the self-sealing integrated urine collector based on a multi-stage retention chamber according to the present invention.

[0016] Figure label: Collection cup 1; cup body 1-1; fixing sleeve 1-2; liquid inlet pipe 1-3; limiting post 1-3-1; guide groove 1-3-2; female thread 1-4; overflow port 1-5; axial positioning pin 1-6; damping plug 2; plug body 2-1; sealing ring 2-2; retention area 2-3; test tube 3; exhaust port 3-1; male thread 3-2; positioning port 3-3. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0018] Example: A self-sealing integrated urine collector based on a multi-stage retention chamber according to an embodiment of the present invention, such as... Figure 1-7 As shown, specifically, it includes a collection cup 1, a damping plug 2, and a test tube 3.

[0019] The collection cup 1 includes a cup body 1-1, a fixing sleeve 1-2, an inlet pipe 1-3, a female buckle 1-4, an overflow port 1-5, and an axial positioning pin 1-6. The fixing sleeve 1-2 is cylindrical, located in the lower middle part of the outer wall of the cup body 1-1, and extends outward and downward. The angle α between the center line of the fixing sleeve 1-2 and the horizontal plane of the upper opening of the cup body 1-1 is preferably 30°. The inner wall of the end of the fixing sleeve 1-2 away from the cup body 1-1 is provided with a radially grooved female buckle 1-4. The axial positioning pin 1-6 is located on the inner wall of the end of the fixing sleeve 1-2 near the cup body 1-1, and is spaced apart from the female buckle 1-4. The upper end of the cup body 1-1... An overflow port 1-5 is provided at the position opposite to the fixing sleeve 1-2 to prevent urine from overflowing and contaminating the patient and the test tube; the axial positioning pins 1-6 are symmetrically arranged on the inner wall of the fixing sleeve 1-2. The axial positioning pins 1-6 are axially extending convex structures with a trapezoidal or arc-shaped cross-section, and their length is equal to the depth of the positioning port 3-3 of the test tube 3; during assembly, the test tube 3 is quickly positioned by engaging the axial positioning pins 1-6 with the bevel of the tube opening, achieving assembly without positioning; during disassembly, the test tube 3 is rotated, and the top of the axial positioning pins 1-6 engages with the bevel of the tube opening of the test tube 3, easily separating the test tube 3 from the collection cup 1.

[0020] The inlet pipe 1-3 is cylindrical and is located inside the fixed sleeve 1-2 and is collinear with the center line of the fixed sleeve 1-2. The outer wall of the end of the inlet pipe 1-3 away from the fixed sleeve 1-2 is provided with a guide groove 1-3-2. The guide groove 1-3-2 is a straight groove and is located above the inlet pipe 1-3. The end of the inlet pipe 1-3 near the fixed sleeve 1-2 is provided with a limiting post 1-3-1. The limiting posts 1-3-1 are symmetrically distributed on the outer wall of the inlet pipe 1-3 and serve as the installation limiting device for the damping plug 2.

[0021] The damping plug 2 is cylindrical and made of medical-grade silicone rubber or thermoplastic elastomer. It includes a plug body 2-1, a sealing ring 2-2, and retention zones 2-3. The plug body 2-1 has multiple retention zones 2-3 inside. The damping plug 2 is collinear with the center line of the inlet pipe 1-3. The sealing ring 2-2 is press-fitted with the inner wall of the test tube 3 to form a seal and physically separate the test tube 3 into two spaces, the inner and outer sides. The inner wall of the plug body 2-1 is tightly fitted with the outer wall of the inlet pipe 1-3, making the multiple retention zones 2-3 into multiple independent retention chambers. The guide channel 1-3-2 connects the inner and outer spaces of the test tube 3 and the multiple retention chambers. The cross-section of the retention chamber is circular or elliptical, and it is a three-stage stepped volume-increasing structure, arranged sequentially from small to large. It is the main structure for forming multiple diameter changes in the liquid pipeline. The fluid undergoes a step-like attenuation at the diameter change interface, realizing the linear accumulation of the resistance coefficient.

[0022] The test tube 3 has a positioning port 3-3 at the upper end of the test tube opening. The positioning port 3-3 is radially symmetrically arranged at two vertices of the test tube opening, dividing the test tube 3 into four equal parts. The connection between the vertices and the positioning port 3-3 is an inclined plane, which serves as a rotation guide structure for the test tube. The positioning port 3-3 is slidably engaged with the axial positioning pin 1-6, and the male buckle 3-2 engages with the female buckle 1-4 to form an anti-rotation structure. The male buckle 3-2 has radially symmetrically arranged vent ports 3-1.

[0023] The self-sealing integrated urine collector based on multi-stage retention chambers is pre-assembled at the factory and can be used directly by the patient. During sampling, the patient holds the test tube 3 with the cup body 1-1 facing upwards. As the urine level in the cup body 1-1 rises, the pressure difference between the cup body 1-1 and the inner cavity of the test tube 3 increases, and urine enters the test tube 3 from the inlet tube 1-3. Air inside the test tube 3 flows out through the guide channel 1-3-2 and then exits through the gap between the test tube 3 and the fixing sleeve and the vent 3-1. When the urine level rises to the guide channel 1-3-2, the liquid flows through multiple retention chambers inside the guide channel 1-3-2 and the connected damping plug 2, forming vortices within the retention chambers, resulting in energy dissipation and a significant reduction in flow velocity. Under the segmented resistance mechanism constructed by the multiple retention chambers and the guide channel 1-3-2, the fluid kinetic energy is dissipated in segments, each... Each stage of diameter change triggers local flow field reconstruction and turbulent kinetic energy dissipation, effectively preventing liquid from continuing to flow into test tube 3. After sampling, tilt cup 1-1 to pour out the remaining urine for testing. At this time, the liquid in inlet tube 1-3, the liquid in guide groove 1-3-2, and sealing ring 2-2 cooperate with each other to achieve dynamic self-sealing based solely on liquid surface tension and geometric constraints without the addition of additional seals, ensuring that urine does not overflow. Before testing, rotate test tube 3, and the inclined surface of test tube 3 engages with axial positioning pin 1-6, forcing male buckle 3-2 to disengage from female buckle 1-4. Test tube 3 can then be removed from fixed sleeve 1-2. During the removal process, sealing ring 2-2 acts as a piston, drawing the liquid in inlet tube 1-3 into test tube 3 to avoid secondary contamination. Then, it can be directly tested.

[0024] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A self-sealing integrated urine collector based on a multi-stage retention chamber, characterized in that, The device includes a collection cup (1), a damping plug (2), and a test tube (3). The collection cup (1) has a liquid inlet pipe (1-3) inside its fixed sleeve (1-2). The damping plug (2) is fitted onto the liquid inlet pipe (1-3). The liquid inlet pipe (1-3) has a guide groove (1-3-2) that connects the inner and outer spaces of the test tube (3) with multiple retention chambers. The inner wall of the fixed sleeve (1-2) has an axially extending axial positioning pin (1-6).

2. The self-sealing integrated urine collector based on a multi-stage retention chamber as described in claim 1, characterized in that, The collection cup (1) is composed of a cup body (1-1), a fixing sleeve (1-2), an inlet pipe (1-3), a female buckle (1-4), an overflow port (1-5), and an axial positioning pin (1-6). The fixing sleeve (1-2) is cylindrical and is located in the lower part of an outer side wall of the cup body (1-1) and extends outward and downward. The inner wall of the fixing sleeve (1-2) away from the cup body (1-1) is provided with a radially grooved female buckle (1-4). The axial positioning pin (1-6) is located on the inner wall of the fixing sleeve (1-2) near the cup body (1-1) and is spaced apart from the female buckle (1-4). An overflow port (1-5) is provided at the upper end of the cup body (1-1) opposite to the fixing sleeve (1-2).

3. The self-sealing integrated urine collector based on a multi-stage retention chamber as described in claim 2, characterized in that, The inlet pipe (1-3) is cylindrical and is located inside the fixed sleeve (1-2). The outer wall of the end of the inlet pipe (1-3) away from the fixed sleeve (1-2) is provided with a straight concave guide groove (1-3-2). The end of the inlet pipe (1-3) near the fixed sleeve (1-2) is provided with a limiting post (1-3-1), which is symmetrically distributed on the outer wall of the inlet pipe (1-3) as an installation limiting device for the damping plug (2). The center line of the inlet pipe (1-3) and the center line of the fixed sleeve (1-2) are collinear. The angle α between the center line of the fixed sleeve (1-2) and the horizontal plane of the opening on the cup body (1-1) is 15°~50°.

4. The self-sealing integrated urine collector based on a multi-stage retention chamber as described in claim 2, characterized in that, The axial positioning pins (1-6) are located on the inner wall of the fixed sleeve (1-2) and are arranged symmetrically. The top shape is similar to the shape of the positioning port (3-3) of the test tube (3). During assembly, the test tube (3) is quickly positioned by the cooperation of the inclined surface of the tube opening with the axial positioning pins (1-6), so that assembly can be carried out without positioning. During disassembly, the test tube (3) is rotated, and the top of the axial positioning pins (1-6) cooperates with the inclined surface of the tube opening of the test tube (3), so that the test tube (3) can be easily separated from the collection cup (1).

5. The self-sealing integrated urine collector based on a multi-stage retention chamber as described in claim 1, characterized in that, The damping plug (2) is cylindrical and consists of a plug body (2-1), a sealing ring (2-2), and retention areas (2-3). The plug body (2-1) has multiple retention areas (2-3) inside. The damping plug (2) is sleeved on the inlet pipe (1-3) and is collinear with the center line of the inlet pipe (1-3). The sealing ring (2-2) is press-fitted with the inner wall of the test tube (3) to form a seal and physically separate the test tube (3) into two spaces inside and outside. The inner wall of the plug body (2-1) is tightly fitted with the outer wall of the inlet pipe (1-3), so that the multiple retention areas (2-3) become multiple independent retention chambers. The guide groove (1-3-2) connects the inner and outer spaces of the test tube (3) and the multiple retention chambers.

6. The self-sealing integrated urine collector based on a multi-stage retention chamber as described in claim 5, characterized in that, The cross-section of the retention chamber (2-5) is circular or elliptical, and it is a three-stage stepped volume-increasing structure, arranged sequentially from small to large. The fluid undergoes a step-like attenuation at the junction of the variable diameter, realizing the linear accumulation of the drag coefficient.

7. The self-sealing integrated urine collector based on a multi-stage retention chamber as described in claim 1, characterized in that, The axial positioning pin (1-6) is an axially extending convex structure with a trapezoidal or arc-shaped cross-section and its length is equal to the depth of the positioning port (3-3) of the test tube (3).

8. The self-sealing integrated urine collector based on a multi-stage retention chamber according to claim 1, characterized in that, The test tube (3) has a positioning port (3-3) at the upper end of the test tube opening. The positioning port (3-3) is arranged radially symmetrically at two vertices of the test tube opening, dividing the test tube (3) into four equal parts. The connection between the vertices and the positioning port (3-3) is an inclined plane, which is a test tube rotation guide structure. The positioning port (3-3) is slidably engaged with the axial positioning pin (1-6), and the male buckle (3-2) is engaged with the female buckle (1-4) to form an anti-rotation structure. The male buckle (3-2) has radially symmetrically arranged exhaust ports (3-1).

9. The self-sealing integrated urine collector based on a multi-stage retention chamber as described in claim 2 or 8, characterized in that, The female buckle (1-4) and the male buckle (3-2) are connected by a snap-fit ​​structure. By rotating the test tube (3), the inclined surface of the test tube (3) cooperates with the axial positioning pin (1-6), forcing the male buckle (3-2) to disengage from the female buckle (1-4), thereby realizing the separation of the test tube (3) from the collection cup (1) after collection.

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