Mechanical urine volume metering device based on buoyancy induction

Abstract

The urine volume mechanical metering device comprises a closestool body, a flow guide assembly and a metering cabin are arranged in the closestool body, the flow guide assembly is arranged at an end opening of the closestool body, the metering cabin is arranged at the bottom of the closestool body, the flow guide assembly is communicated with the metering cabin, and the flow guide assembly comprises an arc-shaped flow guide plate and a flow guide pipeline; the arc-shaped flow guide plate is detachably connected with the flow guide pipeline, a plurality of inserting grooves are formed in the flow guide pipeline, a plurality of inserting pieces are arranged on the arc-shaped flow guide plate, the inserting pieces can be inserted into the inserting grooves, different angles can be obtained by inserting the inserting pieces into the different inserting grooves, a metering module is arranged in the metering cabin, and the metering module is arranged at the bottom of the metering cabin. Urine enters the flow guide pipeline from the arc-shaped flow guide plate and enters the metering cabin through the flow guide pipeline, the metering module in the metering cabin is used for metering the total amount of the urine, accurate flow guide and metering of the urine are achieved, meanwhile, the flow guide plate is designed to be of an arc-shaped structure, the urination characteristics of women are accurately matched, and urine splashing is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of medical devices, in particular to a urine volume mechanical metering device based on buoyancy sensing. BACKGROUND

[0002] Many patients in clinical need to record urine volume due to their illness, but the compliance of patients who can urinate independently is poor, especially female patients due to physiological structural differences, traditional bedpans are indeed inconvenient and face the problem of inconvenient cleaning, and patients with diarrhea also have the special situation of mixed discharge of urine and stool, resulting in inaccurate urine volume recording. In clinical practice, accurate recording of urine volume is a key indicator for evaluating patient's renal function, heart failure status and chemotherapy side effects. However, the current urine volume recording method has significant defects:

[0003] 1. Gender difference dilemma:

[0004] Male patients can use a urine pot with scales, but women lack special equipment due to physiological structural differences (dispersion of urination trajectory, sitting urination); chemotherapy patients often have mixed discharge of urine and stool due to drug toxicity, and traditional methods cannot separate and measure, forcing medical staff to estimate urine volume, which has large errors.

[0005] 2. Clinical compliance bottleneck:

[0006] Female patients need to collect urine in a bedpan and then pour it into a measuring cup, which is cumbersome and prone to spillage, and most female patients in the ward give up recording; hospitalized patients can use a urinary catheter, but it increases the risk of infection and is not suitable for long-term monitoring.

[0007] 3. Technical limitations and cost pressure:

[0008] Electronic urine volume meters (such as ultrasonic flow meters) require power to drive and are difficult to popularize in primary care; existing intelligent toilets rely on pressure sensors, which are high in cost and cannot solve the problem of mixed discharge pollution, and the efficiency of collecting female urination trajectory has not been optimized.

[0009] Therefore, the urine volume mechanical metering device based on buoyancy sensing is proposed to solve the above problems. SUMMARY

[0010] The present application overcomes the shortcomings of the prior art and provides a urine volume mechanical metering device based on buoyancy sensing. To achieve the above purpose, the technical solution adopted by the present application is: a urine volume mechanical metering device based on buoyancy sensing, comprising: a toilet main body, a flow guide assembly and a metering cabin are arranged in the toilet main body, the flow guide assembly is arranged at the port of the toilet main body, the metering cabin is arranged at the bottom of the toilet main body, and the flow guide assembly communicates with the metering cabin;

[0011] The flow guide assembly comprises an arc-shaped flow guide plate and a flow guide pipe, the arc-shaped flow guide plate is detachably connected with the flow guide pipe, a plurality of insertion slots are arranged on the flow guide pipe, a plurality of insertion pieces are arranged on the arc-shaped flow guide plate, the insertion pieces can be inserted into the insertion slots to fix the arc-shaped flow guide plate on the flow guide pipe, and different angles can be obtained by inserting the insertion pieces into different insertion slots.

[0012] The angle relationship between the insertion slot and the insertion piece satisfies the formula:

[0013] (wherein, The radian corresponding to the single insertion piece span is calculated, and multiplied by (i-1) to represent the angle offset accumulated with the insertion position change; wherein m: the number of insertion pieces on the arc-shaped flow guide plate; i: the starting position number of the selected insertion slot (1≤i≤n-m+1); θ i : the included angle between the forward flow guide plate and the horizontal direction when the insertion piece is inserted into the insertion slot of the i-th starting position; L: the arc length interval of adjacent insertion slots in the circumferential direction of the pipe; R: the radius of the flow guide pipe; n: the total number of insertion slots on the flow guide pipe);

[0014] The metering cabin is provided with a metering module, the metering module is arranged at the bottom of the metering cabin, urine enters the flow guide pipe from the arc-shaped flow guide plate, enters the metering cabin through the flow guide pipe, and the metering module in the metering cabin meters the total amount of urine.

[0015] In a preferred embodiment of the present application, the metering module comprises a lifting floating plate, a linkage rack, a photoelectric counter and a scale disc, the linkage rack is arranged on the lifting floating plate, and the linkage rack is connected with the photoelectric counter.

[0016] In a preferred embodiment of the present application, the scale disc is arranged on the surface of the closestool main body, and the scale disc comprises a transparent shell, and a plurality of scale lines are arranged on the shell.

[0017] In a preferred embodiment of the present application, the photoelectric counter further comprises a rotating needle connected to the rotating shaft of the gear set on the linkage rack.

[0018] In a preferred embodiment of the present application, the arc-shaped angle of the arc-shaped flow guide plate is 15°.

[0019] In a preferred embodiment of the present application, the arc-shaped flow guide plate and the inner wall of the flow guide pipe are both provided with a super-hydrophobic nano coating, and the super-hydrophobic nano coating has a hydrophobic performance standard of a contact angle greater than 160°.

[0020] In a preferred embodiment of the present invention, a mixing and separation screen plate is further provided inside the toilet body, and the mixing and separation screen plate is disposed above the metering chamber.

[0021] In a preferred embodiment of the present invention, the mixing and separating sieve plate is provided with sieve holes, the size of which is 2-3 mm.

[0022] In a preferred embodiment of the present invention, the mixing and separating screen plate is installed at an angle inside the toilet body, and the angle of inclination is 52°-56°.

[0023] In a preferred embodiment of the present invention, the sieve holes are tapered, and the upper diameter of the tapered structure is smaller than the lower diameter.

[0024] This invention addresses the shortcomings of the prior art and has the following beneficial effects:

[0025] (1) The present invention sets up a flow guiding component and a metering chamber in the toilet body. The flow guiding component introduces urine into the metering chamber for urine volume detection, thereby achieving accurate flow guiding and metering of urine. At the same time, the flow guiding plate is designed with an arc structure to accurately match the characteristics of female urination and avoid urine splashing.

[0026] Furthermore, the arc-shaped guide plate and the guide pipe are designed to be detachably connected, allowing the arc-shaped plate to be adjusted according to the patient's weight to obtain different arc-shaped structures. The arc-shaped structure satisfies the following angular relationship: the angular relationship between the insertion slot and the insertion piece satisfies... By using mathematical models to adjust the position of the arc-shaped flow guide plate according to physiological needs, a flow guide structure that is more suitable for each patient is obtained. While ensuring comfort, it meets the requirements of ergonomic design, accurately matches the parabolic urination trajectory of women in a sitting position, and solves the problems of urine residue and splashing during women's urination, achieving high-precision, maintenance-free urine volume measurement.

[0027] (2) The metering module of the present invention includes a lifting float, a linkage rack and a dial. When urine enters the metering chamber, the dial is a transparent shell and the metering module is also equipped with a photoelectric counter. Under the action of buoyancy, the float is lifted. At this time, the linkage rack rotates and drives the rotating needle on the photoelectric counter to rotate, thereby obtaining the urine volume. Then, the photoelectric counter is connected to an external system and the counting signal is transmitted to an external data processing device to realize the electronic recording and storage of urine volume, which is convenient for subsequent data analysis and processing. It adopts a pure mechanical transmission, which does not require power supply, avoids electromagnetic interference, and has a simple structure, convenient maintenance and long service life.

[0028] (3) The toilet body of the present application is further provided with a mixed discharge separation sieve plate, which is arranged above the metering cabin, and sieve holes are arranged on the mixed discharge separation sieve plate. When mixed discharge, urine can flow into the metering cabin through the sieve holes, so as to effectively distinguish urine from other excrements, ensure the reliability of urine measurement, and at the same time, without power supply and complex electronic elements, the device failure points are reduced, the maintenance and production costs are reduced, maintenance-free use is realized, and the applicability and stability of the device are improved. BRIEF DESCRIPTION OF DRAWINGS

[0029] The present application is further described below in combination with the drawings and examples.

[0030] Figure 1 is a perspective view of the toilet body of the preferred embodiment of the present application;

[0031] Figure 2 is an enlarged view of the scale disc structure of the preferred embodiment of the present application;

[0032] Figure 3 is a sectional view of the toilet body of the preferred embodiment of the present application;

[0033] Figure 4 is a structural schematic view of the flow guide assembly of the preferred embodiment of the present application;

[0034] Figure 5 is a structural schematic view of the floating plate connection structure of the preferred embodiment of the present application;

[0035] Figure 6 is another structural schematic view of the floating plate connection structure of the preferred embodiment of the present application;

[0036] Figure 7 is a structural schematic view of the mixed discharge separation sieve plate of the preferred embodiment of the present application;

[0037] Figure 8 is a structural schematic view of the sieve hole of the mixed discharge separation sieve plate of the preferred embodiment of the present application.

[0038] In the figure: 1, toilet body; 2, flow guide assembly; 21, arc-shaped flow guide plate; 210, plug-in piece; 22, flow guide pipeline; 3, metering cabin; 4, metering module; 41, lifting floating plate; 42, linkage rack; 43, scale disc; 44, photoelectric counter; 440, rotating needle; 5, mixed discharge separation sieve plate; 51, sieve hole; 510, lower end of sieve hole; 511, upper end of sieve hole. DETAILED DESCRIPTION

[0039] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described, obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work belong to the scope of protection of the present application.

[0040] It should be noted that when a component is referred to as being "fixed" to another component, it can be directly on the other component or there can be another intermediate component fixed by the intermediate component. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or there can be another intermediate component. When a component is referred to as being "disposed" on another component, it can be directly disposed on the other component or there can be another intermediate component. The terms "vertical", "horizontal", "left", "right" and the like used herein are for illustrative purposes only.

[0041] 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 application belongs. The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0042] As shown in Figures 1 to 8 The urine volume mechanical metering device based on buoyancy sensing includes a toilet body 1, a flow guide assembly 2 and a metering cabin 3 are arranged in the toilet body 1, the flow guide assembly 2 is arranged at the port of the toilet body 1, the metering cabin 3 is arranged at the bottom of the toilet body 1, the flow guide assembly 2 communicates with the metering cabin 3, the flow guide assembly 2 includes an arc-shaped flow guide plate 21 and a flow guide pipeline 22, by arranging the flow guide assembly 2 and the metering cabin 3 in the toilet body 1, the flow guide assembly 2 introduces urine into the metering cabin 3 for urine volume detection, precise flow guiding and metering of urine are realized, and the design of the flow guide plate as an arc-shaped structure precisely matches the female urination feature to avoid urine splashing.

[0043] The arc-shaped flow guide plate 21 and the flow guide pipeline 22 are detachably connected, a plurality of insertion grooves are arranged on the flow guide pipeline 22, a plurality of insertion pieces 210 are arranged on the arc-shaped flow guide plate 21, the insertion pieces 210 can be inserted into the insertion grooves to fix the arc-shaped flow guide plate 21 on the flow guide pipeline 22, and different angles can be obtained by inserting the insertion pieces 210 into different insertion grooves;

[0044] The angle relationship between the insertion grooves and the insertion pieces 210 satisfies the formula:

[0045] (wherein, The radian corresponding to the span of a single patch 210 is calculated, multiplied by (i-1) to represent the accumulated angular offset as the patch position changes; where m: the number of patches 210 on the arc-shaped deflector 21; i: the currently selected starting position number of the patch slot (1≤i≤n-m+1); θ i : the angle between the front deflector and the horizontal direction when the patch 210 is inserted into the i-th starting position of the patch slot; L: the arc length interval of adjacent patch slots in the circumferential direction of the pipeline; R: the radius of the deflector pipeline 22; n: the total number of patch slots on the deflector pipeline 22);

[0046] The arc-shaped deflector 21 and the deflector pipeline 22 are designed to be detachably connected, so that the arc-shaped plate can be adjusted according to the weight of the patient to obtain different arc-shaped structures, and the arc-shaped structure satisfies the angle relationship formula: the angle relationship between the patch slot and the patch 210 satisfies By changing the position of the arc-shaped deflector 21 according to the patient's body type and physiological needs through a mathematical model, a deflector structure that is more suitable for each patient is obtained, which not only ensures comfort but also meets the ergonomic design, accurately matches the female sitting posture parabolic urine, solves the problems of urine residue and splashing during female urination, and realizes high-precision and maintenance-free urine measurement.

[0047] Formula application example 1

[0048] The maximum urine volume of a certain patient is 300g, and according to the mechanical formula, the gravity corresponding to 300g is 2.94N. According to the bearing formula F=kxμxAx cos(θ i ), (where k is the material structure coefficient, A is the effective contact area of the patch 210 and the patch slot, and μ is the friction coefficient between the patch 210 and the patch slot) to deduce It is known that: k=0.8, A=200mm 2 , μ=0.6, and θ i =85.47° is obtained by substituting the formula:

[0049] It is known that: m=5; L=10mm; R=50mm; n=20, and θ i =85.47 is substituted into the formula: ​i is equal to 10, so the arc-shaped guide plate 21 is inserted into the tenth insertion slot of the guide pipe 22, and the insertion slots and the insertion plates are marked according to the angle relationship in the production process, so that the insertion can be directly performed according to the urine amount of the patient in the past, without the need for calculation, and the mathematical model changes the position of the arc-shaped guide plate 21 according to the body shape and physiological needs of the patient, so that a guide structure more suitable for each patient is obtained, the comfort is ensured, the ergonomic design is met, the female sitting posture urination parabola is accurately matched, and the problems of urine residue and splashing in the female urination process are solved, and high-precision and maintenance-free urine measurement is realized.

[0050] In a preferred embodiment of the present application, the arc-shaped angle of the arc-shaped guide plate 21 is 15°, which matches the female sitting posture urination parabola.

[0051] In a preferred embodiment of the present application, the arc-shaped guide plate 21 and the inner wall of the guide pipe 22 are both provided with a super-hydrophobic nano coating, and the super-hydrophobic nano coating has a hydrophobic performance standard of a contact angle greater than 160°. The arc-shaped guide plate 21 and the inner wall of the guide pipe 22 are coated with a nano-scale super-hydrophobic coating, the contact angle of the coating is greater than 160°, the coating has excellent hydrophobic performance, and after urine drops on the surface of the coating, the urine quickly gathers into beads and smoothly rolls, quickly flows into the measurement cabin 3, further ensures zero urine residue, and improves the accuracy of measurement.

[0052] The measurement cabin 3 is provided with a measurement module 4, and the measurement module 4 is arranged at the bottom of the measurement cabin 3. Urine enters the guide pipe 22 from the arc-shaped guide plate 21, enters the measurement cabin 3 through the guide pipe 22, and the measurement module 4 in the measurement cabin 3 measures the total amount of urine. The measurement module 4 includes a lifting float plate 41, a linkage rack 42, a photoelectric counter 44 and a scale disc 43. The linkage rack 42 is arranged on the lifting float plate 41, the linkage rack 42 is connected with the photoelectric counter 44, and the scale disc 43 is arranged on the surface of the closestool main body 1. The scale disc 43 includes a transparent shell, and a plurality of scale lines are arranged on the shell. Since the scale disc 43 is a transparent shell, the scale disc 43 can be directly read,

[0053] The measurement module 4 includes a lifting float plate 41, a linkage rack 42 and a scale disc 43. When urine enters the measurement cabin 3, the float plate is lifted under the action of buoyancy. The photoelectric counter 44 further includes a rotating needle 440 connected to the rotating shaft of the gear set on the linkage rack 42. The float plate is lifted to drive the rotating needle 440 to rotate, so that the amount of urine is obtained. The photoelectric counter 44 is connected with an external system, and a counting signal is transmitted to an external data processing device, so that electronic recording and storage of the urine amount are realized, and subsequent data analysis and processing are facilitated. The measurement module 4 adopts pure mechanical transmission, does not need power driving, avoids electromagnetic interference, has a simple structure, is convenient to maintain, and has a long service life.

[0054] The toilet body 1 is further provided with a mixed discharge separation sieve plate 5, the mixed discharge separation sieve plate 5 is arranged above the metering cabin 3, the mixed discharge separation sieve plate 5 is provided with sieve holes 51, the size of the sieve holes 51 is 2-3 mm, the mixed discharge separation sieve plate 5 is obliquely arranged in the toilet body 1, and the oblique angle is 52°-56°. The mixed discharge separation sieve plate 5 is arranged above the metering cabin 3, the mixed discharge separation sieve plate 5 is provided with sieve holes 51, when mixed discharge, urine can flow into the metering cabin 3 through the sieve holes 51, so that the urine and other excrements can be effectively distinguished, the reliability of urine measurement is ensured, meanwhile, the power supply and complex electronic elements are not needed, the equipment failure points are reduced, the maintenance and production costs are reduced, the maintenance-free use is realized, and the applicability and stability of the equipment are improved.

[0055] In a preferred embodiment of the present application, the sieve hole 51 is a tapered structure, the upper end diameter of the tapered structure is smaller than the lower end diameter, preferably, the upper end 511 diameter of the sieve hole is 3 mm, the lower end 510 diameter of the sieve hole is 3.5 mm, and the tapered structure of the sieve hole 51 can prevent feces from adhering and blocking the sieve hole 51.

[0056] Example 1 only discharges urine

[0057] In use, the insertion piece 210 can be inserted into the insertion groove according to the previous urine volume of the patient, after assembly, in a sitting position, urine enters the flow guide pipe 22 along the front inclined arc-shaped flow guide plate 21, under the action of the nanoscale super-hydrophobic coating on the inner wall of the flow guide pipe 22, the urine quickly flows into the metering cabin 3, the user and the medical staff can directly read the urine volume from the scale disc 43, at the same time, the urine pushes the floating plate to rise, the floating plate drives the rack gear set to rotate, the rotating needle 440 rotates to trigger the photoelectric counter 44 to record the data, and the medical staff and the user can check the electronic recording urine volume data through the external data processing equipment connected with the photoelectric counter 44.

[0058] Example 2 discharges feces mixed with urine

[0059] In use, the insertion piece 210 can be inserted into the insertion groove according to the previous urine volume of the patient, after assembly, in a sitting position, urine enters the flow guide pipe 22 along the front inclined arc-shaped flow guide plate 21, under the action of the nanoscale super-hydrophobic coating on the inner wall of the flow guide pipe 22, the urine quickly flows into the metering cabin 3.

[0060] At the same time, part of the urine is discharged together with the feces on the mixed discharge separation sieve plate 5, the urine flows into the metering cabin 3 through the sieve holes 51 arranged on the sieve plate, the sieve holes 51 are tapered structures, the upper end diameter of the tapered structure is smaller than the lower end diameter, and the tapered structure of the sieve holes 51 can prevent feces from adhering and blocking the sieve holes 51.

[0061] The urine flows into the metering cabin 3 through the flow guide pipe 22 and the screen hole 51, the inner wall of the flow guide pipe 22 is under the action of the nanoscale super-hydrophobic coating, and the urine quickly flows into the metering cabin 3, the user and the medical staff can directly read the urine volume from the dial 43, at the same time, the urine pushes the floating plate to rise, the floating plate drives the rack to rotate the gear set, and the rotating needle 440 rotates to trigger the photoelectric counter 44 to record the electronic record, and the user and the medical staff can view the urine volume data recorded by the photoelectric counter 44 connected to the external data processing equipment.

[0062] The present application realizes accurate flow guiding and metering of urine by arranging the flow guide assembly 2 and the metering cabin 3 in the closestool body 1, guiding the urine into the metering cabin 3 through the flow guide assembly 2 to detect the urine volume, and the design of the flow guide plate is an arc structure that accurately matches the female urination characteristics, thereby avoiding urine splashing.

[0063] In addition, the arc-shaped flow guide plate 21 and the flow guide pipe 22 are designed to be detachably connected, the arc-shaped plate can be adjusted according to the weight of the patient, different arc-shaped structures are obtained, and the arc-shaped structure meets the angle relationship that satisfies the formula: the angle relationship between the plug-in groove and the plug-in piece 210 satisfies

[0064] The position of the arc-shaped flow guide plate 21 is changed according to the physiological demand through a mathematical model, so that a flow guide structure that is more suitable for each patient is obtained, the ergonomics design is ensured while the comfort is ensured, the female sitting posture urination parabola is accurately matched, the problems of urine residue and splashing in the female urination process are solved, and high-precision and maintenance-free urine volume measurement is realized.

[0065] In addition, the metering module 4 is arranged in the lifting floating plate 41, the linkage rack 42 and the dial 43 mode, when the urine enters the metering cabin 3, the dial 43 is a transparent shell, the metering module 4 is also provided with a photoelectric counter 44, the floating plate is lifted under the action of the buoyancy, at this time, the linkage rack 42 rotates to drive the rotating needle 440 on the photoelectric counter 44 to rotate, so that the urine volume is obtained, the photoelectric counter 44 is connected with an external system, the counting signal is transmitted to an external data processing equipment, electronic recording and storage of the urine volume are realized, subsequent data analysis and processing are facilitated, pure mechanical transmission is adopted, power driving is not needed, electromagnetic interference is avoided, the structure is simple, maintenance is convenient, and the service life is long.

[0066] Further, the closestool body 1 is also provided with a mixed discharge separation sieve plate 5, the mixed discharge separation sieve plate 5 is arranged above the metering cabin 3, the mixed discharge separation sieve plate 5 is provided with a screen hole 51, when the mixed discharge, the urine can flow into the metering cabin 3 through the screen hole 51, so that the urine and other excretions are effectively distinguished, the reliability of the urine volume measurement is ensured, at the same time, the power supply and complex electronic elements are not needed, the equipment failure points are reduced, the maintenance and production costs are reduced, maintenance-free use is realized, and the applicability and stability of the equipment are improved.

[0067] The above embodiments only express several implementation manners of the present application, which are described in a more specific and detailed manner, but cannot be understood as limiting the scope of the patent application. It should be noted that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, which are equivalent modifications and improvements of the above embodiments according to the essential technology of the present application, and all of them belong to the protection scope of the present application.

Claims

1. A mechanical urine volume metering device based on buoyancy sensing, comprising: The toilet body is characterized in that a flow guide assembly and a metering cabin are arranged in the toilet body, the flow guide assembly is arranged at a port of the toilet body, and the metering cabin is arranged at the bottom of the toilet body, and the flow guide assembly communicates with the metering cabin. The flow guide assembly comprises an arc-shaped flow guide plate and a flow guide pipe, the arc-shaped flow guide plate is detachably connected with the flow guide pipe, a plurality of insertion slots are arranged on the flow guide pipe, a plurality of insertion pieces are arranged on the arc-shaped flow guide plate, the insertion pieces can be inserted into the insertion slots to fix the arc-shaped flow guide plate on the flow guide pipe, and different angles can be obtained by inserting the insertion pieces into different insertion slots. The angle relationship between the insertion slots and the insertion pieces satisfies the formula: (Wherein, The radian corresponding to a single patch span is calculated, multiplied by (i-1) to represent the accumulated angular offset as the patch position changes; wherein m: the number of patches on the arc-shaped guide plate; i: the currently selected starting position number of the patch slot (1≤i≤n-m+1); θ i : the included angle between the forward inclined guide plate and the horizontal direction when the patch is inserted into the i-th starting position of the patch slot; L: the arc length interval of adjacent patch slots in the circumferential direction of the pipeline; R: the radius of the guide pipeline; n: the total number of patch slots on the guide pipeline) A metering module is arranged in the metering cabin, the metering module is arranged at the bottom of the metering cabin, urine enters the flow guide pipe from the arc-shaped flow guide plate, enters the metering cabin through the flow guide pipe, and the metering module in the metering cabin meters the total amount of urine.

2. The buoyancy-sensing based mechanical urine volume metering device according to claim 1, characterized in that: The metering module comprises a lifting floating plate, a linkage rack, a photoelectric counter and a scale disc, the linkage rack is arranged on the lifting floating plate, and the linkage rack is connected with the photoelectric counter.

3. The buoyancy-sensing based mechanical urine volume metering device of claim 2, wherein: The scale disc is arranged on the surface of the toilet body, and the scale disc comprises a transparent shell, a plurality of scale lines are arranged on the shell.

4. The buoyancy-induced based mechanical urine volume metering device of claim 2, wherein: The photoelectric counter further comprises a rotating needle connected to the rotating shaft of the gear set on the linkage rack.

5. The buoyancy-sensing based mechanical urine volume metering device of claim 1, wherein: The arc angle of the arc-shaped flow guide plate is 15°.

6. The buoyancy-sensing based mechanical urine volume metering device of claim 1, wherein: The inner wall of the arc-shaped flow guide plate and the flow guide pipe is provided with a super-hydrophobic nano coating, and the super-hydrophobic nano coating has a hydrophobic performance standard of a contact angle greater than 160°.

7. The buoyancy-sensing based mechanical urine volume metering device of claim 1, wherein: A mixed discharge separation sieve plate is further arranged in the toilet body, and the mixed discharge separation sieve plate is arranged above the metering cabin.

8. The buoyancy-sensing based mechanical urine volume metering device of claim 7, wherein: A sieve hole is arranged on the mixed discharge separation sieve plate, and the size of the sieve hole is 2-3 mm.

9. The buoyancy-induced based mechanical urine volume metering device of claim 7, wherein: The mixed discharge separation sieve plate is obliquely installed in the toilet body, and the inclination angle is 52°-56°.

10. The buoyancy-sensing based mechanical urine volume metering device of claim 8, wherein: The sieve hole has a taper structure, and the upper end diameter of the taper structure is smaller than the lower end diameter.

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