Liquid weighing device and flow detection equipment

Abstract

The utility model discloses a liquid weighing device and a flow detection device, and the liquid weighing device employs a scale body. The liquid storage tank is detachably connected to the scale body, a liquid storage cavity, a first gas port, a second gas port and a liquid outlet are formed, the first gas port, the second gas port and the liquid outlet are communicated with the liquid storage cavity, the first gas port and the liquid outlet are formed in the bottom of the liquid storage tank at intervals and penetrate through the cavity bottom wall of the liquid storage cavity, and the second gas port is formed above the first gas port; the floating scraping plate is arranged in the liquid storage cavity and divides the liquid storage cavity into an upper cavity body and a lower cavity body, the outer side face of the floating scraping plate is attached to the cavity side wall of the liquid storage cavity, the upper cavity body is communicated with the second air port, the lower cavity body is communicated with the first air port and the liquid outlet, and the floating scraping plate is provided with a liquid inlet communicated with the lower cavity body. When the liquid weighing device is used for weighing measurement, the deviation between a measured value and an actual value can be further reduced, so that the liquid flow detection precision is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of measuring equipment, in particular to a liquid weighing device and flow detection equipment. Background Art

[0002] Among the test parameters of aircraft engines, fuel flow is one of the important indicators for evaluating engine performance, and the mass method is one of the important test methods for testing this indicator. In the mass method measurement, weighing the fuel is a very important part. By comparing the weighed value with the value of the flow meter, the coefficient, linearity and other parameters of the calibrated flow meter can be obtained to obtain the verification and calibration results.

[0003] In the related art, the fuel to be tested is introduced into the liquid storage tank through a flow pump, and the mass of the fuel flowing in per unit time is measured by an electronic scale. The measured fuel flows into the main fuel tank through a pipeline, and this process is repeated. In this process, since the fuel on the inner wall of the liquid storage tank cannot be discharged in a short time, the next measurement will cause the measurement result to deviate from the actual result, affecting the accuracy of fuel flow detection. Utility Model Content

[0004] The main purpose of the utility model is to provide a liquid weighing device, aiming to further reduce the deviation of liquid weighing, thereby improving the accuracy of liquid flow detection.

[0005] To achieve the above-mentioned purpose, the liquid weighing device proposed by the utility model comprises:

[0006] It is called the body;

[0007] a liquid storage tank, detachably connected to the scale body, and formed with a liquid storage cavity and a first air port, a second air port and a liquid outlet communicating with the liquid storage cavity, wherein the first air port and the liquid outlet are spaced apart and opened at the bottom of the liquid storage tank and penetrate the bottom wall of the liquid storage cavity, and the second air port is arranged above the first air port; and

[0008] A floating scraper is disposed in the liquid storage cavity and divides the liquid storage cavity into an upper cavity and a lower cavity. The outer side of the floating scraper is attached to the cavity side wall of the liquid storage cavity. The upper cavity is connected to the second air port, and the lower cavity is connected to the first air port and the liquid outlet. The floating scraper is provided with a liquid inlet connected to the lower cavity.

[0009] The upper cavity and the lower cavity can form positive and negative pressures to drive the floating scraper to move up and down at the first air port and the second air port.

[0010] In an optional embodiment, the floating scraper includes a plate body and a liquid guide tube connected to the plate body, the plate body is accommodated in the liquid storage tank, and forms the upper cavity and the lower cavity together with the side wall of the liquid storage cavity, the liquid storage tank is provided with a through hole connected to the upper cavity, the liquid guide tube is provided with the liquid outlet, and partially extends out of the through hole.

[0011] In an optional embodiment, the liquid storage tank further comprises a guide sleeve, the guide sleeve is arranged on the outside of the through hole, and the liquid guide tube is slidably inserted into the guide sleeve.

[0012] In an optional embodiment, the floating scraper further includes an elastic retaining ring, which is sleeved on the outer side of the plate body and elastically abuts against the side wall of the liquid storage cavity.

[0013] In an optional embodiment, the elastic retainer is made of self-lubricating silicone.

[0014] In an optional embodiment, the side wall of the liquid storage cavity is further provided with at least one limiting protrusion, and the plate body moves toward the second air port and can abut against the limiting protrusion.

[0015] In an optional embodiment, a slot is provided at the bottom of the liquid storage tank, and part of the scale body is snapped into the slot.

[0016] In an optional embodiment, the liquid storage tank includes a tank body and a tank cover, the tank cover is detachably connected to the tank body and encloses the tank body to form the liquid storage cavity, and the first air port, the second air port and the liquid outlet are opened in the tank body.

[0017] In an optional embodiment, the liquid weighing device further includes a reversing valve, and the reversing valve is connected to the liquid inlet.

[0018] The utility model also provides a flow detection device, comprising the liquid weighing device as described above.

[0019] The technical solution of the utility model adopts a scale body; a liquid storage tank is detachably connected to the scale body, and is formed with a liquid storage cavity and a first air port, a second air port and a liquid outlet connected to the liquid storage cavity, the first air port and the liquid outlet are arranged at the bottom of the liquid storage tank at intervals, and penetrate the bottom wall of the liquid storage cavity, and the second air port is arranged above the first air port; a floating scraper is arranged in the liquid storage cavity, and divides the liquid storage cavity into an upper cavity and a lower cavity, the outer side surface of the floating scraper is attached to the side wall of the liquid storage cavity, the upper cavity is connected to the second air port, the lower cavity is connected to the first air port and the liquid outlet, and the floating scraper is provided with a liquid inlet connected to the lower cavity.

[0020] In the present application, the liquid to be tested enters the lower cavity through the liquid inlet of the floating scraper, and the scale body measures the liquid flowing into the cavity. After the measurement is completed, the liquid outlet is opened, and the liquid to be tested flows out from the liquid outlet. At the same time, the second air port injects air into the upper cavity. Under the action of air pressure, the floating scraper moves downward, scrapes the liquid to be tested remaining on the side wall of the liquid storage cavity to the bottom wall of the cavity, and flows out from the liquid outlet. After the floating scraper moves to the preset position, the second air port stops intake of air, and air is taken into the lower cavity from the first air port. At this time, the air pressure in the lower cavity is greater than that in the upper cavity, and the floating scraper moves upward, that is, moves toward the side of the second air port to the initial position. After returning to the initial position, the liquid to be tested is injected into the lower cavity again, and this process is repeated. From the above process, it can be seen that the present application arranges a floating scraper in the liquid storage chamber. Under the action of the positive and negative pressures of the upper cavity and the lower cavity, the floating scraper moves up and down between the first air port and the second air port, thereby cleaning the liquid to be tested remaining on the side wall of the liquid storage chamber. In this way, when performing weighing measurement, the deviation between the measured value and the actual value can be further reduced, thereby improving the accuracy of liquid flow detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0022] Figure 1 This is a front view of an embodiment of the liquid weighing device of the utility model;

[0023] Figure 2 for Figure 1 A partial structural schematic diagram of a liquid weighing device shown;

[0024] Figure 3 for Figure 2 A top view of the liquid weighing device shown;

[0025] Figure 4 for Figure 3 A cross-sectional view of the liquid weighing device shown along the AA direction;

[0026] Figure 5 for Figure 4 A magnified detail of point A in the middle.

[0027] Description of Figure Numbers:

[0028]

[0029]

[0030] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0033] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0034] Reference Figures 1 to 5 The utility model provides a liquid weighing device 100 .

[0035] In the embodiment of the utility model, the liquid weighing device 100 includes: a scale body 20; a liquid storage tank 10, which is detachably connected to the scale body 20 and is formed with a liquid storage cavity 10a and a first air port 10b, a second air port 10c and a liquid outlet 10d connected to the liquid storage cavity 10a, wherein the first air port 10b and the liquid outlet 10d are spaced apart and opened at the bottom of the liquid storage tank 10 and penetrate the bottom wall of the liquid storage cavity 10a, and the second air port 10c is arranged above the first air port 10b; a floating scraper 30 is arranged in the liquid storage cavity 10a, and The liquid storage chamber 10a is divided into an upper chamber 30a and a lower chamber 30b, the outer side surface of the floating scraper 30 is attached to the side wall of the liquid storage chamber 10a, the upper chamber 30a is connected to the second air port 10c, the lower chamber 30b is connected to the first air port 10b and the liquid outlet 10d, and the floating scraper 30 is provided with a liquid inlet 32a connected to the lower chamber 30b; the upper chamber 30a and the lower chamber 30b can form positive and negative pressures to drive the floating scraper 30 to move up and down at the first air port 10b and the second air port 10c.

[0036] Specifically, in this embodiment, the scale body 20 can be a commercially available electronic scale, or the style and structure of the scale body 20 can be reset according to actual detection needs, as long as it can measure the substance to be tested placed on its surface.

[0037] The liquid storage tank 10 includes a tank body 13 and a tank cover 14. The tank body 13 and the tank cover 14 can be formed of plastic or metal materials and can be circular or rectangular in shape. The tank cover 14 can be detachably connected to the tank body 13 through a thread or a snap-on structure. The tank cover 14 and the tank body 13 enclose a liquid storage chamber 10a. The first air port 10b, the second air port 10c and the liquid outlet 10d are opened in the tank body 13. The first air port 10b and the second air port 10c are respectively connected to an external air pump through pipelines. The liquid inlet 32a and the liquid outlet 10d are respectively connected to an external valve through pipelines. Among them, the valve of the liquid inlet 32a is a reversing valve 40. One end of the reversing valve 40 is connected to the inflow end of the liquid, and the other two ends are respectively connected to the liquid inlet 32a and the main fuel tank. The reversing valve 40 is provided to realize the function of injecting fuel into the main fuel tank during the measurement process, thereby ensuring that the measurement and the function of injecting fuel into the main fuel tank are carried out simultaneously. The bottom of the tank body 13 is convexly provided with an annular convex rib (not shown), which encloses a slot 10f. The shape of the slot 10f is adapted to the shape of the tray of the scale body 20, so that the tray can be partially engaged in the slot 10f to fix the two, thereby preventing the tank body 13 from shaking during the measurement process and affecting the measurement results.

[0038] In the present application, the liquid to be measured enters the lower cavity 30b through the liquid inlet 32a of the floating scraper 30, and the liquid flowing into the cavity is measured by the scale body 20. After the measurement is completed, the liquid outlet 10d is opened, and the liquid to be measured flows out from the liquid outlet 10d. At the same time, the second air port 10c injects air into the upper cavity 30a. Under the action of air pressure, the floating scraper 30 moves downward, scrapes the liquid to be measured remaining on the side wall of the liquid storage cavity 10a to the bottom wall of the cavity, and flows out from the liquid outlet 10d. After the floating scraper 30 moves to the preset position, the second air port 10c stops intake of air, and air is taken into the lower cavity 30b from the first air port 10b. At this time, the air pressure in the lower cavity 30b is greater than that in the upper cavity 30a. The floating scraper 30 moves upward, that is, moves toward the side of the second air port 10c to the initial position. After returning to the initial position, the liquid to be measured is injected into the lower cavity 30b again, and this is repeated. From the above process, it can be seen that the present application sets a floating scraper 30 in the liquid storage chamber 10a. Under the positive and negative pressures of the upper cavity 30a and the lower cavity 30b, the floating scraper 30 moves up and down between the first air port 10b and the second air port 10c, thereby cleaning the liquid to be tested remaining on the side wall of the liquid storage chamber 10a. In this way, when performing weighing measurement, the deviation between the measured value and the actual value can be further reduced, thereby improving the accuracy of liquid flow detection.

[0039] Please see again Figure 4 In this embodiment, the floating scraper 30 includes an integrally formed plate body 31 connected to a liquid guide tube 32 of the plate body 31. The plate body 31 and the liquid guide tube can also be formed of metal or plastic materials. The plate body 31 is accommodated in the liquid storage tank 10, and forms an upper cavity 30a and a lower cavity 30b with the cavity side wall of the liquid storage cavity 10a. The liquid storage tank 10 is provided with a through hole 10e connected to the upper cavity 30a. The liquid guide tube 32 is provided with the liquid outlet 10d, and part of it extends out of the through hole 10e. One end of the liquid guide tube 32 is connected to the reversing valve 40 through a pipeline. The floating scraper 30 of the present application has the functions of cleaning the cavity side wall and inletting liquid, which can further simplify the overall structure of the liquid weighing device 100 and facilitate production and manufacturing.

[0040] Furthermore, the liquid storage tank 10 further includes a guide sleeve 11, which can be formed integrally or welded to the outside of the through hole 10e, and the liquid guide tube 32 can be slidably plugged into the guide sleeve 11. The guide sleeve 11 can ensure the overall balance of the plate body 31 during the lifting movement to the greatest extent, that is, the plate body 31 will not tilt due to the pressure during the lifting movement, thereby ensuring the cleaning effect on the side wall of the cavity.

[0041] Please see again Figure 4 and Figure 5Furthermore, the floating scraper 30 also includes an elastic retainer 33, wherein the elastic retainer 33 can be made of silicone or rubber material. Preferably, the elastic retainer 33 is made of self-lubricating silicone. The inner side surface of the elastic retainer 33 is concavely formed with a snap-in groove. When it is sleeved on the outer side of the plate body 31, the outer edge of the plate body 31 is snapped into the snap-in groove 10f, and when the plate body 31 is accommodated in the liquid storage cavity 10a, the elastic retainer 33 elastically abuts against the cavity side wall of the liquid storage cavity 10a. The present application can not only further improve the cleaning effect of the cavity side wall by setting the elastic retainer 33, but also minimize the wear of the plate body 31 and the tank body 13 during the lifting and lowering movement of the plate body 31, so that the service life of the liquid weighing device 100 is longer.

[0042] Furthermore, in the present application, the side wall of the liquid storage cavity 10a is also convexly provided with at least one limiting protrusion 12, which is located between the first gas port 10b and the second gas port 10c and above the plate body 31. When the plate body 31 moves toward the second gas port 10c, that is, when the plate body 31 moves upward, the upper surface of the plate body 31 can abut against the limiting protrusion 12. By providing the limiting protrusion 12, it is possible to avoid the situation where the plate body 31 as a whole passes over the second gas port 10c after moving upward, thereby ensuring the stability of the liquid weighing device 100 in use.

[0043] The present utility model also proposes a flow detection device (not shown), which includes a liquid weighing device 100. The specific structure of the liquid weighing device 100 refers to the above embodiment. Since the flow detection device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0044] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A liquid weighing device, characterized in that: include: It is called the body; a liquid storage tank, detachably connected to the scale body, and formed with a liquid storage cavity and a first air port, a second air port and a liquid outlet communicating with the liquid storage cavity, wherein the first air port and the liquid outlet are spaced apart and opened at the bottom of the liquid storage tank and penetrate the bottom wall of the liquid storage cavity, and the second air port is arranged above the first air port; and A floating scraper is disposed in the liquid storage cavity and divides the liquid storage cavity into an upper cavity and a lower cavity. The outer side of the floating scraper is attached to the cavity side wall of the liquid storage cavity. The upper cavity is connected to the second air port, and the lower cavity is connected to the first air port and the liquid outlet. The floating scraper is provided with a liquid inlet connected to the lower cavity. The upper cavity and the lower cavity can form positive and negative pressures to drive the floating scraper to move up and down at the first air port and the second air port.

2. The liquid weighing device according to claim 1, characterized in that: The floating scraper includes a plate body and a liquid guide tube connected to the plate body. The plate body is accommodated in the liquid storage tank and forms the upper cavity and the lower cavity with the side wall of the liquid storage cavity. The liquid storage tank is provided with a through hole connected to the upper cavity. The liquid guide tube is provided with the liquid outlet and partially extends out of the through hole.

3. The liquid weighing device according to claim 2, characterized in that: The liquid storage tank also includes a guide sleeve, which is arranged on the outside of the through hole, and the liquid guide tube can be slidably inserted into the guide sleeve.

4. The liquid weighing device according to claim 2, characterized in that: The floating scraper also includes an elastic retainer, which is sleeved on the outer side of the plate body and elastically abuts against the side wall of the liquid storage cavity.

5. The liquid weighing device according to claim 4, characterized in that: The elastic retainer is made of self-lubricating silica gel.

6. The liquid weighing device according to claim 2, characterized in that: The side wall of the liquid storage cavity is also convexly provided with at least one limiting protrusion, and the plate body moves toward the second air port and can abut against the limiting protrusion.

7. The liquid weighing device according to any one of claims 1 to 6, characterized in that: A slot is provided at the bottom of the liquid storage tank, and part of the scale body is snapped into the slot.

8. The liquid weighing device according to any one of claims 1 to 6, characterized in that: The liquid storage tank comprises a tank body and a tank cover, wherein the tank cover is detachably connected to the tank body and encloses the tank body to form the liquid storage cavity, and the first air port, the second air port and the liquid outlet are opened in the tank body.

9. The liquid weighing device according to any one of claims 1 to 6, characterized in that: The liquid weighing device also includes a reversing valve, which is connected to the liquid inlet.

10. A flow detection device, characterized in that: The invention comprises a liquid weighing device as claimed in any one of claims 1 to 9.

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