Flow measuring device

Abstract

This utility model discloses a flow measurement device, including a body, a first moving member, a second moving member, and a measuring member. The body includes at least one inlet and a receiving cavity communicating with the inlet, the receiving cavity being used to receive and store the flowing medium. The first moving member is disposed through the receiving cavity and is capable of dividing the receiving cavity into a first chamber and a second chamber. The second moving member includes a first end and a second end, the first end being rigidly connected to the first moving member. The measuring member is disposed on the body and faces the second end, the measuring member being used to measure the displacement of the second moving member. When the medium enters the receiving cavity through the inlet, driven by the pressure difference between the first chamber and the second chamber, the first moving member can move, and drive the second moving member to move together, and the direction of movement of the second moving member is consistent with the direction of movement of the first moving member.

Description

Technical Field

[0001] This utility model relates to the field of measuring instrument technology, and more specifically, to a flow measurement device. Background Technology

[0002] In industrial production and scientific research, flow measurement is a crucial technology that directly impacts production efficiency, quality control, and the effective utilization of resources. Flow measurement devices, as the core equipment for achieving this function, are widely used in various industries such as petroleum, chemical, water treatment, food and beverage, and pharmaceuticals. With continuous technological advancements, higher demands are being placed on the accuracy, stability, response time, and applicability of flow measurement.

[0003] Traditional flow measurement technologies include differential pressure flow meters, volumetric flow meters, velocity flow meters, and float flow meters. However, these flow meters are not effective at measuring small flow rates, resulting in inaccurate flow measurement results. Utility Model Content

[0004] The purpose of this invention is to provide a new technical solution for a flow measurement device.

[0005] According to one aspect of the present invention, a flow measurement device is provided, comprising:

[0006] The body includes at least one inlet and a receiving cavity communicating with the inlet, the receiving cavity being used to receive and store the flowing medium;

[0007] A first movable member is disposed through the receiving cavity, and the first movable member is capable of dividing the receiving cavity into a first chamber and a second chamber;

[0008] The second moving member includes a first end and a second end, wherein the first end is rigidly connected to the first moving member.

[0009] A measuring element is disposed on the body and faces the second end, and the measuring element is used to measure the displacement of the second moving element;

[0010] When the medium enters the receiving cavity through the inlet, driven by the pressure difference between the first chamber and the second chamber, the first moving member can move and drive the second moving member to move together, and the movement direction of the second moving member is the same as the movement direction of the first moving member.

[0011] Optionally, the inlet includes a first inlet and a second inlet, the first inlet communicating with the first chamber and the second inlet communicating with the second chamber;

[0012] When the medium enters the first chamber through the first inlet, the pressure in the first chamber is greater than the pressure in the second chamber, enabling the first moving member to move in the first direction; when the medium enters the second chamber through the second inlet, the pressure in the first chamber is less than the pressure in the second chamber, enabling the first moving member to move in the opposite direction to the first direction.

[0013] Optionally, it also includes a first switching switch, which is used to control the working state of the first inlet and the working state of the second inlet.

[0014] Optionally, it also includes a storage tank. The first switching switch has a first state and a second state. When the first switching switch is in the first state, the medium can enter the second chamber through the second inlet, and the medium in the first chamber can flow back to the storage tank through the first inlet.

[0015] When the first switching switch is in the second state, the medium can enter the first chamber through the first inlet, and the medium in the second chamber can flow back to the storage tank through the second inlet.

[0016] Optionally, it further includes a steering component, which is disposed on the inner wall of the body and intersects the movement direction of the first moving component. The steering component is used to switch the movement direction of the first moving component.

[0017] Optionally, the steering component includes a first steering component and a second steering component, wherein the first steering component is located on the inner wall of the first chamber away from the second chamber, and the second steering component is located on the inner wall of the second chamber away from the first chamber;

[0018] When the first moving member moves to abut against the first steering member, the first steering member can switch the first moving member to move in the first direction; when the first moving member moves to abut against the second steering member, the second steering member can switch the first moving member to move in the opposite direction to the first direction.

[0019] Optionally, it also includes a detection element for detecting the position of the first moving member, and the steering element is a reversing valve. When the detection element detects that the first moving member is at a critical position, the reversing valve can switch the movement direction of the first moving member.

[0020] Optionally, the first movable member includes a first part and a second part connected together, the first part intersecting the second part.

[0021] Optionally, the first movable member further includes a third part, which is connected to both sides of the second part, and the extension direction of the third part is parallel to the extension direction of the first part.

[0022] Optionally, the second moving member includes a fourth part and a fifth part connected together, wherein the extending direction of one of the fourth part and the fifth part is consistent with the movement direction of the first moving member.

[0023] Optionally, it may also include a large flow meter;

[0024] When the inflow of medium is greater than or equal to the predetermined flow rate, the medium enters the large flow meter, and the large flow meter completes the flow measurement; when the inflow of medium is less than the predetermined flow rate, the medium enters the receiving cavity through the inlet, and the minute flow rate is measured by the minute displacement generated by the first moving part.

[0025] Optionally, a second switching switch is also included, which is used to switch the flow path of the medium based on a comparison between the flow rate of the medium entering the housing and a predetermined flow rate.

[0026] One technical advantage of this utility model is:

[0027] The flow measurement device includes a body, a first moving member, a second moving member, and a measuring member. The body includes at least one inlet and a receiving cavity communicating with the inlet, the receiving cavity being used to receive and store the incoming medium. The first moving member extends through the receiving cavity and is capable of dividing the receiving cavity into a first chamber and a second chamber. The second moving member includes a first end and a second end, the first end being rigidly connected to the first moving member. The measuring member is disposed on the body and faces the second end, the measuring member being used to measure the displacement of the second moving member. When the medium enters the receiving cavity through the inlet, driven by the pressure difference between the first chamber and the second chamber, the first moving member can move, and drive the second moving member to move together, and the direction of movement of the second moving member is consistent with the direction of movement of the first moving member.

[0028] In this way, the displacement of the second moving component, captured in real time by the measuring element, can be converted into corresponding flow information. This real-time response capability gives the flow measurement device a significant advantage in situations requiring rapid and accurate measurement of flow changes. Furthermore, the design of the main body and its internal cavity allows the medium entering from the inlet to remain stably within a single chamber. Compared to existing methods that measure flow during its movement, the flow measurement device of this embodiment offers better measurement accuracy and reliability, and can also measure minute flow rates, resulting in a wider measurement range.

[0029] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. Attached Figure Description

[0030] The accompanying drawings, which form part of this specification, illustrate embodiments of the present invention and, together with the specification, serve to explain the principles of the present invention.

[0031] Figure 1 This is a schematic diagram of a flow measurement device according to an embodiment of the present invention;

[0032] Figure 2 This is a schematic diagram of a flow measurement device according to an embodiment of the present invention;

[0033] Figure 3 This is a schematic diagram of a flow measurement device according to an embodiment of the present invention;

[0034] Figure 4 This is a measurement data curve of a flow measurement device according to an embodiment of the present invention.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1. Body; 11. Inlet; 12. First chamber; 13. Second chamber; 2. First moving part; 21. First part; 22. Second part; 23. Third part; 3. Second moving part; 31. Fourth part; 32. Fifth part; 4. Measuring element; 5. First switching switch; 6. Second switching switch; 7. Bracket; 8. High flow meter. Detailed Implementation

[0037] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present invention.

[0038] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0039] Technologies and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such technologies and equipment should be considered part of the specification.

[0040] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0041] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0042] This invention provides a flow measurement device that can be used in hydraulic systems and is suitable for detecting extremely small leaks of oil.

[0043] like Figure 1 and Figure 2 As shown, the flow measurement device provided in this embodiment of the present invention includes:

[0044] Body 1, the body 1 includes at least one inlet 11 and a receiving cavity communicating with the inlet 11, the receiving cavity being used to receive and store the flowing medium;

[0045] A first movable member 2 is disposed through the receiving cavity, and the first movable member 2 is capable of dividing the receiving cavity into a first chamber 12 and a second chamber 13;

[0046] The second moving part 3 includes a first end and a second end, and the first end is rigidly connected to the first moving part 2.

[0047] Measuring element 4, which is disposed on the body 1 and faces the second end, is used to measure the displacement of the second moving element 3;

[0048] When the medium enters the receiving cavity through the inlet 11, driven by the pressure difference between the first chamber 12 and the second chamber 13, the first moving member 2 can move and drive the second moving member 3 to move together, and the movement direction of the second moving member 3 is consistent with the movement direction of the first moving member 2.

[0049] Specifically, the body 1 can be made of a robust and durable metal material (such as stainless steel), or glass for special corrosive media, to ensure stable operation in various media environments. The body 1 has one, two, or even more inlets 11 for receiving the medium to be measured. The inlet 11 can be designed as circular or rectangular, and its size can be adjusted according to actual needs to regulate the flow rate of the inflowing medium. The inlet 11 communicates with a receiving cavity inside the body 1, which temporarily stores the inflowing medium for subsequent flow rate measurement.

[0050] The first moving part 2 can be made of corrosion-resistant materials (such as ceramics or special alloys) and has a sealing structure to ensure that the two chambers separated by the first moving part 2 do not leak into each other. Figure 1 and Figure 2As shown, the first moving part 2 can be designed as a rod-shaped structure, with the first moving part 2 penetrating through the receiving cavity and its two ends located on both sides of the receiving cavity.

[0051] The first moving member 2 divides the receiving cavity into two chambers, a first chamber 12 and a second chamber 13. When the medium enters one of the two chambers through the inlet 11, a pressure difference is generated between the first chamber 12 and the second chamber 13. Driven by this pressure difference, the first moving member 2 can move. In other words, the flow rate of the medium can be converted into the displacement of the first moving member 2.

[0052] The second moving part 3 can also be made of corrosion-resistant and lightweight material, and it includes a first end and a second end. The first end can be connected to the end of the first moving part 2 by means of threaded connection, pin connection, etc., so that the first moving part 2 can drive the second moving part 3 to move together.

[0053] like Figure 1 and Figure 2 As shown, the measuring element 4 is mounted on the main body 1 and faces the second end of the second moving element 3. The measuring element 4 can be a non-contact displacement sensor such as a laser displacement sensor or a photoelectric displacement sensor, and it can measure the displacement of the second moving element 3. The measuring element 4 can be directly mounted on the main body 1 or mounted on the main body 1 through the bracket 7, both of which can achieve the fixation of the measuring element 4.

[0054] Specifically, when the medium enters the receiving cavity through inlet 11, due to the pressure difference generated by the medium flow, the first moving member 2 will move towards the side with lower pressure, driving the second moving member 3 to move together. As the medium flow rate increases, the pressure difference between the first chamber 12 and the second chamber 13 increases, causing the displacement of the first moving member 2 and the second moving member 3 to increase accordingly. The measuring element 4 measures the displacement d of the second moving member 3 in real time and converts it into an electrical signal, which is then processed by the data processing unit to obtain the real-time flow information of the medium. The data processing unit's processing includes acquiring the cross-sectional area s of the receiving cavity, and multiplying the cross-sectional area s by the displacement d to obtain the flow rate of the medium.

[0055] In the flow measurement device of this embodiment, when the medium enters the receiving cavity, the pressure difference between the first chamber 12 and the second chamber 13 drives the first moving member 2 to move, which in turn drives the second moving member 3 to move, thereby converting the flow rate value into a displacement value. Compared with traditional mechanical or electronic flow meters, this device can reflect the flow rate change of the medium more directly and accurately, improving the measurement accuracy and reliability of the flow measurement device. Therefore, by measuring the displacement of the first moving member 2, and based on the cross-sectional area of ​​the corresponding chamber and time data, the instantaneous flow rate and cumulative flow rate can be calculated in real time. Furthermore, its measurement accuracy can reach the micrometer level, making the measurement of extremely small flow rates possible.

[0056] Furthermore, since the displacements of the first moving member 2 and the second moving member 3 occur instantaneously with changes in the medium flow rate, the measuring element 4 can capture the displacement of the second moving member 3 in real time and convert it into corresponding flow rate information. Even with minute flow rates, the first moving member 2 and the second moving member 3 will respond to the minute flow rate by generating displacement, facilitating capture by the measuring element 4. This real-time response capability gives the flow measurement device a significant advantage in applications requiring rapid and accurate measurement of flow rate changes.

[0057] In this embodiment, the configuration of the body 1 and the cavity within the body 1 allows the medium entering from the inlet 11 to remain stably within a cavity. Compared to existing methods that measure flow during medium flow, the flow measurement device of this embodiment offers better measurement accuracy and reliability, thereby enabling the measurement of minute flow rates over a wider range.

[0058] Alternatively, an outlet can be provided on the main body 1 or an inlet 11 can be reused as an outlet. The outlet is connected to the storage tank, so that after the medium enters one of the first chamber 12 and the second chamber 13 from one inlet 11, the medium stored in the other of the first chamber 12 and the second chamber 13 flows back to the storage tank through the outlet, so that the medium can alternately flow back to the storage tank from the first chamber 12 and the second chamber 13.

[0059] Optionally, the inlet 11 includes a first inlet and a second inlet, the first inlet communicating with the first chamber 12 and the second inlet communicating with the second chamber 13;

[0060] When the medium enters the first chamber 12 through the first inlet, the pressure in the first chamber 12 is greater than the pressure in the second chamber 13, enabling the first moving member 2 to move in the first direction; when the medium enters the second chamber 13 through the second inlet, the pressure in the first chamber 12 is less than the pressure in the second chamber 13, enabling the first moving member 2 to move in the opposite direction to the first direction.

[0061] like Figure 1 and Figure 2 As shown, the flow measurement device of this embodiment includes two inlets 11, a first inlet and a second inlet, which are connected to a first chamber 12 and a second chamber 13 respectively. A reversing valve can be installed at each of the two inlets 11 to switch the flow of the medium from one of the first inlet and the second inlet to the other.

[0062] When the medium enters the first chamber 12 through the first inlet on the left, the pressure in the first chamber 12 is greater than the pressure in the second chamber 13. Driven by the pressure difference between the first chamber 12 and the second chamber 13, the first moving member 2 can move in the first direction, i.e., to the right, and drive the second moving member 3 to move to the right as well. The measuring member 4 can capture the displacement of the second moving member 3 and convert it into corresponding flow information. At this time, the second chamber 13 can be connected to the storage tank through the second inlet.

[0063] When the medium enters the second chamber 13 through the second inlet on the right, the pressure in the first chamber 12 is less than the pressure in the second chamber 13. Driven by the pressure difference between the first chamber 12 and the second chamber 13, the first moving member 2 can move in the second direction, i.e., to the left, and drive the second moving member 3 to move to the left as well. The measuring member 4 can capture the displacement of the second moving member 3 and convert it into corresponding flow information. At this time, the first chamber 12 can be connected to the storage tank through the first inlet.

[0064] Optionally, it also includes a first switching switch 5, which is used to control the working state of the first inlet and the working state of the second inlet.

[0065] like Figure 3 As shown, the housing is used to house and install the main body 1, the first moving part 2, the second moving part 3, the measuring part 4, and the first switching switch 5, and to provide reliable structural support. The first switching switch 5 can be a reversing valve, a switch, etc. The first switching switch 5 can switch the working state of the first inlet and the second inlet, so that one of the first inlet and the second inlet is used as the inlet for the medium, while the other of the first inlet and the second inlet is connected to the liquid storage tank, thereby ensuring the structural stability of the flow measurement device.

[0066] Specifically, when the first moving part 2 moves to its limit position and can no longer measure the flow rate, the first switching switch 5 can reverse the medium flow path. As the medium flows in, the first moving part 2 begins to move in the opposite direction, allowing the device to continue measuring the flow rate. When the first moving part 2 moves to the other limit position, the first switching switch 5 reverses the medium flow path again. This process is repeated to achieve uninterrupted flow rate measurement.

[0067] Optionally, it also includes a storage tank. The first switching switch 5 has a first state and a second state. When the first switching switch 5 is in the first state, the medium can enter the second chamber 13 through the second inlet, and the medium in the first chamber 12 can flow back to the storage tank through the first inlet.

[0068] When the first switching switch 5 is in the second state, the medium can enter the first chamber 12 through the first inlet, and the medium in the second chamber 13 can flow back to the storage tank through the second inlet.

[0069] Specifically, the storage tank is used to contain and store the outflowing medium to improve the measurement reliability of the flow measurement device. By adjusting the working state of the first switching switch 5, one of the first inlet and the second inlet can be used as the medium inlet, while the other of the first inlet and the second inlet is connected to the storage tank, thereby ensuring the structural stability of the flow measurement device and enabling the measurement of the flow rate of the bidirectional inflowing medium.

[0070] Optionally, it also includes a steering component, which is disposed on the inner wall of the body 1 and intersects with the movement direction of the first moving component 2. The steering component is used to switch the movement direction of the first moving component 2.

[0071] Specifically, a steering component can be provided on the inner wall of the body 1. The steering component is located on the extension line of the movement direction of the first moving component 2, so that the first moving component 2 can contact the steering component during its movement. The steering component can be any structure that can trigger a positioning signal, such as a smooth curved surface, inclined surface, or protrusion with a specific angle, located on the inner wall of the body 1.

[0072] By incorporating a deflector, the flow measurement device can switch the direction of movement of the first moving part 2. Whenever the first moving part 2 reaches its limit position, the deflector can switch the medium flow path, causing the first moving part 2 to move in the opposite direction until it reaches the limit position at the other end, and then switch again. This process is repeated, thereby enabling continuous measurement of the medium flow rate, thus expanding the application range of the flow measurement device and improving the flexibility and accuracy of the measurement.

[0073] Optionally, the steering component includes a first steering component and a second steering component, wherein the first steering component is located on the inner wall of the first chamber 12 away from the second chamber 13, and the second steering component is located on the inner wall of the second chamber 13 away from the first chamber 12.

[0074] When the first moving member 2 moves to abut against the first steering member, the first steering member can switch the first moving member 2 to move in the first direction; when the first moving member 2 moves to abut against the second steering member, the second steering member can switch the first moving member 2 to move in the opposite direction to the first direction.

[0075] Specifically, a steering member can be provided on the inner walls of the first chamber 12 and the second chamber 13 respectively. That is, the first steering member and the second steering member are located on the two opposite inner walls of the receiving cavity, and the first steering member and the second steering member are both on the extension line of the movement direction of the first moving member 2, so that the first moving member 2 can contact one of the first steering member and the second steering member during the movement of the first moving member 2.

[0076] like Figure 3 As shown, for example, the first steering component is disposed on the inner wall of the first chamber 12 away from the second chamber 13, and the second steering component is disposed on the inner wall of the second chamber 13 away from the first chamber 12. When the first moving component 2 moves in the first direction, that is, to the right, as the medium continues to flow in, the first moving component 2 can abut against the second steering component. At this time, the first moving component 2 can move in the opposite direction, that is, continue to move to the left. When the first moving component 2 moves in the second direction, that is, to the left, as the medium continues to flow in, the first moving component 2 can abut against the first steering component. At this time, the first moving component 2 can move in the opposite direction, that is, continue to move to the right.

[0077] Optionally, it also includes a detection element for detecting the position of the first moving part 2, and the steering element is a reversing valve. When the detection element detects that the first moving part 2 is in a critical position, the reversing valve can switch the movement direction of the first moving part 2.

[0078] Specifically, detection devices such as laser sensors, infrared sensors, and cameras can be installed to detect the position of the first moving part 2 in real time. When the detection device detects that the first moving part 2 has moved to a critical position, that is, when the first moving part 2 has moved to abut against the inner wall of the body 1, the detection device transmits the critical position signal to the controller. The controller controls the reversing valve to adjust the movement direction of the first moving part 2, so that the first moving part 2 can continue to move in the opposite direction. This can prevent the first moving part 2 from causing damage to the body 1 and improve the reliability and safety of the movement control of the first moving part 2.

[0079] Optionally, the first movable member 2 includes a first part 21 and a second part 22 connected together, the first part 21 and the second part 22 intersecting each other.

[0080] Specifically, the first moving part 2 can be configured to include two parts: a first part 21 and a second part 22. The first part 21 and the second part 22 are connected to each other, that is, there is an angle between the first part 21 and the second part 22. Both can divide the receiving cavity into two chambers: a first chamber 12 and a second chamber 13. Each chamber is connected to an inlet 11 so that the medium can alternately enter and exit the two chambers.

[0081] Optionally, the first movable member 2 further includes a third part 23, which is connected to both sides of the second part 22, and the extension direction of the third part 23 is parallel to the extension direction of the first part 21.

[0082] like Figure 2 As shown, the first moving member 2 may include three parts: a first part 21, a second part 22, and a third part 23. The third part 23 and the first part 21 both extend along the movement direction of the first moving member 2, and the second part 22 extends perpendicular to the movement direction of the first moving member 2. Both can divide the receiving cavity into two chambers: a first chamber 12 and a second chamber 13. Each chamber is connected to an inlet 11 so that the medium can alternately enter and exit the two chambers.

[0083] Depending on the actual arrangement, the second movable part 3 can be connected to one of the third part 23 and the first part 21 to realize the measurement function of the flow measurement device.

[0084] Optionally, the second moving member 3 includes a fourth part 31 and a fifth part 32 connected together, wherein the extending direction of one of the fourth part 31 and the fifth part 32 is consistent with the movement direction of the first moving member 2.

[0085] like Figure 2 As shown, the second moving part 3 may include two connected parts, a fourth part 31 and a fifth part 32. One of the fourth part 31 and the fifth part 32 is connected to the first moving part 2, and the other part of the fourth part 31 and the fifth part 32 faces the measuring part 4, so that the second moving part 3 can move under the drive of the first moving part 2, so that the measuring part 4 can detect the corresponding displacement d and convert it into an electrical signal output. The real-time flow information of the medium can be obtained by processing the data processing unit. The data processing unit includes collecting the cross-sectional area s of the receiving cavity, and multiplying the cross-sectional area s by the displacement d to obtain the flow rate of the medium.

[0086] Specifically, the extension direction of one of the fourth part 31 and the fifth part 32 is consistent with the movement direction of the first moving member 2, so that the displacement detected by the measuring member 4 is also the displacement d of the second moving member 3, thereby ensuring the reliability of the obtained medium flow rate.

[0087] Optionally, it also includes a large flow meter 8. When the flow rate of the incoming medium is greater than or equal to the predetermined flow rate, the medium enters the large flow meter 8 and the large flow meter 8 completes the flow rate measurement. When the flow rate of the incoming medium is less than the predetermined flow rate, the medium enters the receiving cavity through the inlet 11 and the small flow rate is measured by the small displacement generated by the first moving member 2.

[0088] like Figure 3 As shown, large flow meters 8, such as pressure flow meters, volumetric flow meters, velocity flow meters, and float flow meters, can also be installed. The large flow meters 8 and the measuring element 4 work together to measure the flow rate of the medium. When the flow rate of the incoming medium is greater than or equal to the predetermined flow rate, the medium enters the large flow meter 8 for detection; when the flow rate of the incoming medium is less than the predetermined flow rate, the medium enters the receiving cavity through the inlet 11, and the first moving element 2 drives the second moving element 3 to move, so that the measuring element 4 can detect the small flow rate.

[0089] In this way, it is possible to classify and detect small flow rates and normal flow rates. It can improve the measurement reliability and accuracy of the flow measurement device, and can also perform detection by switching between the large flow meter 8 and the measuring element 4. Furthermore, it can protect the structure of the main body 1, the first moving part 2, the second moving part 3 and the measuring element 4, and prevent them from being damaged or abnormal due to the impact of large flow rates.

[0090] Optionally, a second switching switch 6 is also included, which is used to switch the flow path of the medium based on a comparison between the flow rate of the medium entering the housing and a predetermined flow rate.

[0091] like Figure 3 As shown, the second switching switch 6 can be a reversing valve, switch, etc. The second switching switch 6 can switch the flow path of the medium according to the size of the medium flow rate, so that the medium can enter the large flow meter 8 or the body 1, thereby ensuring the structural stability and measurement reliability of the flow measurement device.

[0092] The above embodiments mainly describe the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. For the sake of brevity, they will not be elaborated here.

[0093] While specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

[0094] like Figure 4 The diagram shows partial experimental data of the flow measurement device based on an embodiment of this utility model. The data processing unit can calculate the velocity and cumulative flow of the first moving part 2 based on the displacement sensor readings. The velocity multiplied by the corresponding chamber cross-sectional area in the diagram gives the instantaneous flow rate.

Claims

1. A flow measurement device, characterized in that, include: The body (1) includes at least one inlet (11) and a receiving cavity communicating with the inlet (11), the receiving cavity being used to receive and store the flowing medium; A first movable member (2) is disposed through the receiving cavity, and the first movable member (2) is capable of dividing the receiving cavity into a first chamber (12) and a second chamber (13). The second moving part (3) includes a first end and a second end, the first end being rigidly connected to the first moving part (2); Measuring element (4), the measuring element (4) is disposed on the body (1) and faces the second end, the measuring element (4) is used to measure the displacement of the second moving element (3); When the medium enters the receiving cavity through the inlet (11), driven by the pressure difference between the first chamber (12) and the second chamber (13), the first moving part (2) can move and drive the second moving part (3) to move together, and the movement direction of the second moving part (3) is consistent with the movement direction of the first moving part (2).

2. The flow measurement device according to claim 1, characterized in that, The inlet (11) includes a first inlet and a second inlet, the first inlet being connected to the first chamber (12) and the second inlet being connected to the second chamber (13); When the medium enters the first chamber (12) through the first inlet, the pressure of the first chamber (12) is greater than the pressure of the second chamber (13), so that the first moving member (2) can move in the first direction; when the medium enters the second chamber (13) through the second inlet, the pressure of the first chamber (12) is less than the pressure of the second chamber (13), so that the first moving member (2) can move in the opposite direction to the first direction.

3. The flow measurement device according to claim 2, characterized in that, It also includes a first switching switch (5), which is used to control the working state of the first inlet and the working state of the second inlet.

4. The flow measurement device according to claim 3, characterized in that, It also includes a storage tank. The first switching switch (5) has a first state and a second state. When the first switching switch (5) is in the first state, the medium can enter the second chamber (13) through the second inlet, and the medium in the first chamber (12) can flow back to the storage tank through the first inlet. When the first switching switch (5) is in the second state, the medium can enter the first chamber (12) through the first inlet, and the medium in the second chamber (13) can flow back to the storage tank through the second inlet.

5. The flow measurement device according to claim 1, characterized in that, It also includes a steering component, which is disposed on the inner wall of the body (1) and intersects the movement direction of the first moving component (2). The steering component is used to switch the movement direction of the first moving component (2).

6. The flow measurement device according to claim 5, characterized in that, The steering component includes a first steering component and a second steering component, wherein the first steering component is located on the inner wall of the first chamber (12) away from the second chamber (13), and the second steering component is located on the inner wall of the second chamber (13) away from the first chamber (12); When the first moving member (2) moves to abut against the first steering member, the first steering member can switch the first moving member (2) to move in the first direction; when the first moving member (2) moves to abut against the second steering member, the second steering member can switch the first moving member (2) to move in the opposite direction to the first direction.

7. The flow measurement device according to claim 5, characterized in that, It also includes a detection element, which is used to detect the position of the first moving part (2). The steering element is a reversing valve. When the detection element detects that the first moving part (2) is in a critical position, the reversing valve can switch the movement direction of the first moving part (2).

8. The flow measurement device according to claim 1, characterized in that, The first movable element (2) includes a first part (21) and a second part (22) connected together, the first part (21) and the second part (22) intersecting each other.

9. The flow measurement device according to claim 8, characterized in that, The first movable part (2) further includes a third part (23), which is connected to both sides of the second part (22) and the first part (21) respectively, and the extension direction of the third part (23) is parallel to the extension direction of the first part (21).

10. The flow measurement device according to claim 1, characterized in that, The second moving member (3) includes a fourth part (31) and a fifth part (32) connected together, wherein the extension direction of one of the fourth part (31) and the fifth part (32) is consistent with the movement direction of the first moving member (2).

11. The flow measurement device according to claim 1, characterized in that, It also includes a large flow meter (8); When the inflow of medium is greater than or equal to the predetermined flow rate, the medium enters the large flow meter (8) and the flow rate is measured by the large flow meter (8); when the inflow of medium is less than the predetermined flow rate, the medium enters the receiving cavity through the inlet (11) and the small flow rate is measured by the small displacement generated by the first moving part (2).

12. The flow measurement device according to claim 11, characterized in that, It also includes a second switching switch (6), which is used to switch the flow path of the medium according to the comparison between the flow rate of the medium entering the housing and the predetermined flow rate.

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