High-precision volume detector

Abstract

The utility model provides a high-precision volume detector which comprises a main measuring cylinder, a piston is arranged in the main measuring cylinder, and a main measuring cavity of which the volume can be changed through the displacement of the piston is formed in the main measuring cylinder; the three-way pipe is connected with one end, far away from the piston, of the main measuring cavity, a discharge valve / plug is arranged at the lower end of the three-way pipe, and the upper end of the three-way pipe is communicated with an auxiliary measuring pipe which is vertically arranged; the auxiliary measuring pipe comprises a liquid level indicating cavity which is vertically formed, the lower end of the liquid level indicating cavity is communicated with the three-way pipe, and a liquid inlet is formed in the upper end of the liquid level indicating cavity; the section of the main measuring cylinder is larger than that of the liquid level indicating cavity; the main measuring cylinder is transparent, the outer wall of the main measuring cylinder is provided with main volume marks which are arranged at intervals along the moving direction of the piston, the auxiliary measuring tube is transparent, the outer wall of the auxiliary measuring tube is provided with auxiliary volume marks which are arranged at intervals along the height direction, and the volume ratio of the main volume marks to the auxiliary volume marks under the same scale is (10-1000): 1. The utility model has the advantage of high measurement precision.

Description

TECHNICAL FIELD

[0001] The utility model relates to high precision volume detection appearance field, concretely relates to a high precision volume detection appearance. BACKGROUND

[0002] The existing volume detection generally carries out the volume measurement through the measuring cup or through the large volume detection groove / barrel and cooperates the water level meter, but cannot provide the high precision detection reference because of the liquid surface area influence, such as the volume error of the 50CM diameter measuring cylinder is far from the volume error of the 5CM diameter measuring cylinder when the liquid surface rises 1mm, although the flow pump and the flow meter can be used to measure, but all have the big error. SUMMARY

[0003] Based on the above problems, the utility model aims at providing a high precision volume detection appearance with high measurement precision.

[0004] In view of the above problems, the following technical scheme is provided: a high precision volume detection appearance, including main measuring cylinder, the piston is arranged in the main measuring cylinder, and the main measuring cavity with the volume changeable by the piston displacement is formed at the front end of the piston, and the three-way pipe is connected with the end of the main measuring cavity away from the piston, the discharge valve / stopper is arranged at the lower end of the three-way pipe, and the auxiliary measuring pipe is communicated with the upper end of the three-way pipe and arranged vertically, the auxiliary measuring pipe includes the liquid level indicating cavity arranged vertically and communicated with the three-way pipe, and the liquid inlet is formed at the upper end of the liquid level indicating cavity, the cross section of the main measuring cylinder is larger than that of the liquid level indicating cavity, the main measuring cylinder is transparent, the main volume mark is arranged on the outer wall of the main measuring cylinder and spaced apart along the moving direction of the piston, the auxiliary measuring pipe is transparent, the auxiliary volume mark is arranged on the outer wall of the auxiliary measuring pipe and spaced apart along the height direction, and the volume ratio of the main volume mark and the auxiliary volume mark with the same scale is 10-1000:1.

[0005] The utility model is further provided with the drive screw at the rear end of the piston, the tail cover is arranged at the rear side of the main measuring cylinder, the drive module is arranged in the tail cover and screwed with the drive screw to control the displacement of the piston, the liquid level measuring cavity is arranged in the auxiliary measuring pipe and communicated with the liquid level indicating cavity, and the liquid level sensor is arranged on the side wall of the liquid level measuring cavity.

[0006] The utility model is further provided with the storage groove recessed in the liquid level measuring cavity at the cross section of the auxiliary measuring pipe, and the liquid level sensor is arranged in the storage groove.

[0007] The utility model is further provided with the liquid level indicating cavity and the liquid level measuring cavity, and the cross section of the auxiliary measuring pipe is in the shape of 8, and the C-shaped buckle is arranged on the outer wall of the auxiliary measuring pipe corresponding to one side of the liquid level measuring cavity to fix the liquid level sensor in the storage groove.

[0008] The utility model further sets up, liquid level sensor is non contact sensor.

[0009] The utility model further sets up, liquid level sensor is capacitive sensor, inserts in liquid level measurement cavity.

[0010] The utility model further sets up, still include the liquid inlet funnel of installing in the liquid inlet position.

[0011] The utility model further sets up, when the piston and main measurement cavity front end are opposite, and the liquid level in auxiliary measurement pipe and the zero position of vice volume mark are level, the sum of the volume of three -way pipe content volume and auxiliary measurement pipe's vice volume mark below constitutes filling volume, when the piston and main measurement cavity front end are opposite, and main volume mark starts to calculate according to this filling volume.

[0012] The utility model has the advantages of:

[0013] 1, the volume ratio of main volume mark and vice volume mark under the same grid graduation is preferably 100:1, the cross section difference of the two is used to control the measurement accuracy, the distance of the piston moving one grid is equal to the distance of the liquid level of auxiliary measurement pipe rising or falling 100 grids, therefore after injecting a fixed amount of liquid medium, the number of grids of the piston moving relative to main volume mark is used to obtain the integer volume parameter (such as 150 grids = 1500ml, and each grid is 10ml), and then the precise volume parameter (such as 45 grids = 4.5ml, and each grid is 0.1ml) is obtained by referring to the liquid level of auxiliary measurement pipe and vice volume mark, so that the purpose of ensuring the measurement accuracy under large volume measurement is achieved, and the discharge valve / stopper is used to discharge the excess medium and empty the volume occupation.

[0014] 2, the liquid level sensor includes lower limit liquid level and upper limit liquid level, when the liquid level reaches the upper limit liquid level, the driving module controls the piston to move one grid distance of main volume mark, and the medium in the auxiliary measurement pipe is drawn into the main measurement cavity, and the liquid level reaches the lower limit liquid level when the drawing process is stopped, the volume difference between the upper limit liquid level and the lower limit liquid level is 10ml, and the reciprocating is continued until all the liquid in the measured volume is added, and the precise volume parameter is obtained by reading the liquid level height of main volume mark and vice volume mark, the liquid level indicating cavity and the liquid level measurement cavity are separated from each other, and only the lower ends are communicated with each other, so that when liquid is added to the liquid level indicating cavity, the liquid does not flow down along the liquid level measurement cavity from top to bottom, and the liquid level sensor is not misread. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the first perspective three-dimensional structure schematic diagram of the utility model.

[0016] Figure 2 It is the second perspective three-dimensional structure schematic diagram of the utility model.

[0017] Figure 3 This is a schematic diagram of the full sectional three-dimensional structure of this utility model.

[0018] Figure 4 This is a schematic diagram of the exploded three-dimensional structure of this utility model.

[0019] Figure 5 This is a three-dimensional structural diagram of the cross-section of the auxiliary measuring tube of this utility model.

[0020] Figure 6 This is a full-section three-dimensional structural diagram of the auxiliary measuring tube of this utility model.

[0021] The labels in the diagram mean: 10-Main measuring cylinder; 11-Main measuring chamber; 12-Main volume indicator; 13-Tail cap; 14-Drive module; 20-Piston; 21-Drive screw; 30-T-connector; 31-Drain valve / plug; 40-Auxiliary measuring tube; 41-Level indicator chamber; 411-Inlet; 42-Secondary volume indicator; 43-Level measuring chamber; 431-Containing tank; 50-Level sensor; 60-C-shaped retaining strip; 70-Inlet funnel. Detailed Implementation

[0022] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0023] refer to Figures 1 to 6 ,like Figures 1 to 6 The high-precision volume measuring instrument shown includes a main measuring cylinder 10, within which a piston 20 is provided, and a main measuring chamber 11 is formed at the front end of the piston 20, the volume of which can be changed by the displacement of the piston 20; it also includes a three-way pipe 30 connected to the end of the main measuring chamber 11 away from the piston 20, the lower end of the three-way pipe 30 being provided with a discharge valve / plug 31, and the upper end of the three-way pipe 30 being connected to a vertically arranged auxiliary measuring pipe 40; the auxiliary measuring pipe 40 includes a vertically opened section, the lower end of which is connected to the three-way pipe 30. The liquid level indicating cavity 41 is open, and the upper end of the liquid level indicating cavity 41 forms a liquid inlet 411; the cross section of the main measuring cylinder 10 is larger than the cross section of the liquid level indicating cavity 41; the main measuring cylinder 10 is transparent, and its outer wall is provided with main volume markings 12 spaced apart along the moving direction of the piston 20; the auxiliary measuring tube 40 is transparent, and its outer wall is provided with secondary volume markings 42 spaced apart along the height direction; the volume ratio of the main volume markings 12 and the secondary volume markings 42 at the same scale is 10~1000:1.

[0024] In the above structure, the volume ratio of the main volume mark 12 and the auxiliary volume mark 42 is preferably 100:1, and the cross-sectional difference of the two is used to control the measurement accuracy, so that the distance of the piston 20 moving one grid is equal to the distance of the auxiliary measuring tube 40 liquid surface rising or falling 100 grids; therefore, after injecting a fixed amount of liquid medium, the number of grids that the piston 20 moves relative to the main volume mark 12 is used as the main integer volume parameter (such as 150 grids = 1500 ml, each grid is 10 ml), and then the precise volume parameter (such as 45 grids = 4.5 ml, each grid is 0.1 ml) is obtained by referring to the liquid level of the auxiliary measuring tube 40 and the auxiliary volume mark 42, so as to achieve the purpose of ensuring the measurement accuracy in large volume measurement; the discharge valve / stopper 31 is used to discharge the excess medium and empty the volume occupation.

[0025] In the embodiment, the rear end of the piston 20 is provided with a drive screw 21; the rear side of the main measuring cylinder 10 is provided with a tail cover 13, and the tail cover 13 is provided with a drive module 14 which is threadedly connected with the drive screw 21 to control the displacement of the piston 20; the auxiliary measuring tube 40 further comprises a liquid level measuring cavity 43 which is arranged in parallel with the liquid level indicating cavity 41 and is communicated with the liquid level indicating cavity 41 at the lower end, and the upper end of the liquid level measuring cavity 43 is open and the side wall is provided with a liquid level sensor 50; the liquid level of the liquid level measuring cavity 43 is synchronously raised and lowered with the liquid level of the liquid level indicating cavity 41.

[0026] In the above structure, the drive module 14 is provided with a step / servo motor (not shown in the figure), which drives a worm (not shown in the figure) to rotate a worm gear (not shown in the figure), and the drive screw 21 is threadedly connected with the center of the worm gear (not shown in the figure) to realize the axial displacement of the drive screw 21 under the rotation of the worm gear (not shown in the figure); the outer wall of the drive screw 21 is provided with a key groove (prior art, not shown in the figure) which is opened along the axial direction of the drive screw 21, and is used to adapt to a rotation-stopping pin (not shown in the figure) in the tail cover 13 or the drive module 14 to avoid the drive screw 21 from rotating with the worm gear (not shown in the figure) when the worm gear (not shown in the figure) rotates; the liquid level sensor 50 comprises a lower limit liquid level and an upper limit liquid level (the lower limit liquid level is zero), when the liquid surface reaches the upper limit liquid level, the drive module 14 controls the piston 20 to move one grid distance of the main volume mark 12, and the medium in the auxiliary measuring tube 40 is drawn into the main measuring cavity 11, and the liquid surface reaches the lower limit liquid level (zero position) during the drawing process, and then the drawing is stopped immediately, the volume difference between the upper limit liquid level and the lower limit liquid level is 10 ml, and the process is repeated until all the liquid in the measured volume is added, and then the precise volume parameter is obtained by reading the liquid level height of the main volume mark 12 and the auxiliary volume mark 42; the liquid level indicating cavity 41 and the liquid level measuring cavity 43 are separated from each other, and are only communicated with each other at the lower end, so that when the liquid level indicating cavity 41 is filled with liquid, the liquid will not flow down along the liquid level measuring cavity 43 from top to bottom, causing the liquid level sensor 50 to misread.

[0027] The auxiliary measuring tube 40 is provided with a concave containing groove 431 in the liquid level measuring cavity 43, and the liquid level sensor 50 is located in the containing groove 431.

[0028] In the above structure, the liquid level measuring cavity 43 surrounds the liquid level sensor 50, thereby improving the measurement sensitivity.

[0029] In the embodiment, the liquid level indicating cavity 41 and the liquid level measuring cavity 43 make the cross section of the auxiliary measuring tube 40 present an 8 shape, and the outer wall of the auxiliary measuring tube 40 corresponding to one side of the liquid level measuring cavity 43 is provided with a C-shaped buckle 60 for fixing the liquid level sensor 50 in the containing groove 431.

[0030] In the above structure, the C-shaped buckle 60 is convenient for fixing the liquid level sensor 50.

[0031] In the embodiment, the liquid level sensor 50 is a non-contact sensor.

[0032] In the embodiment, the liquid level sensor 50 is a capacitive sensor and is inserted into the liquid level measuring cavity 43.

[0033] In the embodiment, the liquid inlet funnel 70 is installed at the position of the liquid inlet 411.

[0034] In the above structure, the liquid inlet funnel 70 is convenient for liquid filling.

[0035] In the embodiment, when the piston 20 abuts against the front end of the main measuring cavity 11 and the liquid surface in the auxiliary measuring tube 40 is leveled with the zero position of the auxiliary volume mark 42, the sum of the volume of the three-way tube 30 and the volume below the auxiliary volume mark 42 of the auxiliary measuring tube 40 constitutes the filling volume, and the main volume mark 12 starts to calculate according to the filling volume when the piston 20 abuts against the front end of the main measuring cavity 11.

[0036] In the above structure, the measurement error caused by the filling volume can be excluded.

[0037] In the embodiment, the moving distance of the piston 20 is controlled by a program, the transparent main measuring cylinder 10 is convenient for observing the position of the piston 20, the reference with the main volume mark 12 is realized, or the parameter of the main volume mark 12 is directly calculated by the program and displayed on the display screen.

[0038] In the above structure, when the liquid surface reaches the upper limit liquid level, the worm gear rotates one round, the drive screw moves one pitch, the pitch is 1 mm, and the main volume mark is also 1 mm per small block, and at this time, the liquid surface reaches the lower limit liquid level.

[0039] The above merely is the preferred embodiment of the present application, it should be pointed out that, for ordinary skilled in the art, without departing from the technical principles of the present application, under the premise of, can also make a number of improvements and variations, the above hypothetical these improvements and variations should also be considered as the protection scope of the present application.

Claims

1. A high-precision volume detector comprising a main measuring cylinder, characterized in that: The main measuring cylinder is provided with a piston and a main measuring cavity with variable volume formed by displacement of the piston at the front end of the piston; further comprising a three-way pipe connected to the end of the main measuring cavity away from the piston, the lower end of the three-way pipe is provided with a discharge valve / plug, the upper end of the three-way pipe is communicated with a vertically arranged auxiliary measuring pipe; the auxiliary measuring pipe comprises a vertically arranged liquid level indicating cavity, the lower end of which is communicated with the three-way pipe, and the upper end of the liquid level indicating cavity forms a liquid inlet; the cross section of the main measuring cylinder is larger than that of the liquid level indicating cavity; the main measuring cylinder is transparent, and the outer wall thereof is provided with main volume marks arranged at intervals along the moving direction of the piston; the auxiliary measuring pipe is transparent, and the outer wall thereof is provided with auxiliary volume marks arranged at intervals along the height direction; the volume ratio of the main volume marks and the auxiliary volume marks with the same scale is 10-1000:

1.

2. The high-precision volume detector according to claim 1, characterized in that: The rear end of the piston is provided with a drive screw; the rear side of the main measuring cylinder is provided with a tail cover, the tail cover is provided with a drive module threadedly matched with the drive screw to control the displacement of the piston; the auxiliary measuring pipe further comprises liquid level measuring cavities arranged side by side with the liquid level indicating cavity and communicated with each other at the lower end, the upper end of the liquid level measuring cavity is open and the side wall thereof is provided with a liquid level sensor.

3. The high-precision volume detector according to claim 2, characterized in that: The cross section of the auxiliary measuring pipe is provided with a volume placing groove arranged in a concave manner into the liquid level measuring cavity, and the liquid level sensor is located in the volume placing groove.

4. The high-precision volume detector according to claim 3, characterized in that: The cross section of the auxiliary measuring pipe is provided with a volume placing groove arranged in a concave manner into the liquid level measuring cavity, and the liquid level sensor is located in the volume placing groove.

5. The high-precision volume detector according to claim 3, characterized in that: The cross section of the auxiliary measuring pipe is provided with a volume placing groove arranged in a concave manner into the liquid level measuring cavity, and the liquid level sensor is located in the volume placing groove.

6. The high-precision volume detector according to claim 2, characterized in that: The liquid level sensor is a non-contact sensor.

7. The high-precision volume detector according to claim 1, characterized in that: The liquid level sensor is a capacitive sensor inserted into the liquid level measuring cavity.

8. The high-precision volume detector according to claim 1, characterized in that: Further comprising a liquid inlet funnel installed at the position of the liquid inlet. When the piston abuts against the front end of the main measuring cavity, and the liquid surface in the auxiliary measuring pipe is leveled with the zero position of the auxiliary volume mark, the sum of the volume in the three-way pipe and the volume below the auxiliary volume mark of the auxiliary measuring pipe constitutes the filling volume; when the piston abuts against the front end of the main measuring cavity, the main volume mark starts to calculate according to the filling volume.

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