Sensing device for measuring fluid pressure

Abstract

The utility model discloses a sensing device for measuring fluid pressure, which comprises a measuring tube, an input port fixedly communicated with the top end of the measuring tube, an output port fixedly communicated with the bottom end of the measuring tube, a buffer structure arranged inside the measuring tube and a sensing device arranged outside the measuring tube, the buffer structure comprises a throttling valve, a valve rod, a valve clack and a rubber ring, the valve rod is rotationally connected to the interior of the throttling valve and extends into the measuring tube, the valve clack is fixedly connected to the exterior of the valve rod, the rubber ring is connected to the exterior of the valve clack in a sleeving mode, and the valve clack is fixedly connected to the interior of the valve rod. The sensing device comprises a mounting shell, an elastic membrane, a signal display screen, a displacement sensor and a connecting line. Under the matching action of the buffer structure and the sensing device, the position of the valve clack in the measuring pipe is adjusted according to the flow and pressure of fluid, the purpose of adjusting the flow is achieved, direct impact of the fluid on the sensing device is reduced, and the measuring precision and stability are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of fluid pressure measurement, and in particular relates to a sensor device for fluid pressure measurement. Background Art

[0002] Fluid experiments refer to experiments that use different types of fluids to measure parameters such as flow velocity, flow rate, and pressure in a pipeline under different working conditions. Fluid experiments are often used to study the physical properties of fluids. They are particularly common in the study of professional courses such as fluid mechanics, thermodynamics, water supply and drainage engineering, and HVAC engineering.

[0003] Traditional fluid pressure measurement devices usually use elastic diaphragms, cantilever beams, spring tubes, etc. to transmit pressure to sensors. However, these devices are often complex in structure, and the multi-stage transmission mechanism is prone to accumulated errors, resulting in low measurement accuracy. At the same time, these devices lack sufficient buffering and throttling capabilities when facing high-pressure or high-flow fluids, which can easily cause sensor damage or inaccurate measurements. Utility Model Content

[0004] The utility model aims to solve the problem that the measuring device in the prior art lacks sufficient buffering and throttling capabilities when facing high-pressure or high-flow fluid, which easily causes sensor damage or inaccurate measurement. The utility model proposes the following technical solutions:

[0005] A sensing device for measuring fluid pressure, comprising a measuring tube, an input port fixedly connected to the top end of the measuring tube, an output port fixedly connected to the bottom end of the measuring tube, a buffer structure arranged inside the measuring tube, and a sensing device arranged outside the measuring tube;

[0006] The buffer structure includes a throttle valve, a valve stem, a valve disc, and a rubber ring. The valve stem is rotatably connected to the inside of the throttle valve and extends to the inside of the measuring tube. The valve disc is fixedly connected to the outside of the valve stem, and the rubber ring is sleeved on the outside of the valve disc.

[0007] The sensing device includes a mounting shell, an elastic diaphragm, a signal display screen, a displacement sensor, and a connecting line. The elastic diaphragm is fixedly mounted inside the mounting shell, the signal display screen is arranged on one side of the mounting shell, and the displacement sensor is fixedly mounted outside the mounting shell and is located on the outer surface of the elastic diaphragm.

[0008] With the cooperation of the buffer structure and the sensor device, the valve disc adjusts its position in the measuring tube according to the fluid flow and pressure, thereby changing the cross-sectional area of ​​the flow channel to achieve the purpose of regulating the flow, reducing the direct impact of the fluid on the sensor device, and improving the measurement accuracy and stability.

[0009] As a preferred embodiment of the above technical solution, the throttle valve is fixedly installed on the outside of the measuring tube, and the valve stem and the valve disc are both rotatably connected to the inside of the measuring tube.

[0010] By adjusting the valve disc, its position in the measuring tube can be adjusted according to the fluid flow and pressure.

[0011] As a preferred embodiment of the above technical solution, the outer diameter of the valve disc is matched with the inner diameter of the rubber ring, and the outer surface of the rubber ring is matched with the inner diameter of the measuring tube.

[0012] Under the sealing of the rubber ring, it is ensured that the measuring tube can still maintain good sealing performance under high pressure difference.

[0013] As a preferred embodiment of the above technical solution, the mounting shell is fixedly connected to the outside of the measuring tube, and the connecting line is fixedly connected between the displacement sensor and the signal display screen.

[0014] Under real-time detection by the displacement sensor, it is converted into an electrical signal output through a connecting wire.

[0015] As a preferred embodiment of the above technical solution, a cleaning mechanism is arranged on the outside of the mounting shell, and the cleaning mechanism includes a mounting plate, a motor, a connecting rod, a scraper, and a cleaning brush. The mounting plate is fixedly connected to the bottom of the mounting shell, the motor is fixedly installed on the outside of the mounting plate, and the connecting rod is fixedly connected to the output shaft of the motor.

[0016] Under the drive of the motor, the connecting rod and the scraper make circular motion.

[0017] As a preferred embodiment of the above technical solution, the scraper is fixedly connected to an end of the connecting rod away from the motor, and the cleaning brush is fixedly connected to the back of the scraper and abuts against the outer surface of the elastic diaphragm.

[0018] Under the transmission of the connecting rod, the scraper and the cleaning brush are driven and matched, so that the outer surface of the elastic diaphragm can be cleaned regularly.

[0019] The beneficial effects of the utility model are:

[0020] (1) Under the cooperation of the buffer structure and the sensor device, the valve disc adjusts its position in the measuring tube according to the fluid flow and pressure, thereby changing the cross-sectional area of ​​the flow channel to achieve the purpose of regulating the flow, reducing the direct impact of the fluid on the sensor device, and improving the measurement accuracy and stability;

[0021] (2) Under the cleaning action of the cleaning mechanism, it is convenient to regularly clean the elastic diaphragm to prevent dust and dirt from affecting the measurement accuracy, which helps to combine with the displacement sensor to achieve high-precision measurement of fluid pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 What is shown is a structural stereogram of the entire device;

[0023] Figure 2 What is shown is a structural stereogram of the buffer structure;

[0024] Figure 3 What is shown is a structural stereogram of the sensing device;

[0025] Figure 4 What is shown is a sectional perspective view of the structure of the entire device;

[0026] Figure 5 Shown is a structural stereogram of the cleaning mechanism.

[0027] In the figure: 1. measuring tube; 2. input port; 3. output port; 4. buffer structure; 41. throttle valve; 42. valve stem; 43. valve disc; 44. rubber ring; 5. sensor device; 51. mounting shell; 52. elastic diaphragm; 53. signal display screen; 54. displacement sensor; 55. connecting line; 6. cleaning mechanism; 61. mounting plate; 62. motor; 63. connecting rod; 64. scraper; 65. cleaning brush. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiments of the present utility model clearer, the technical solution of the present utility model will be clearly and completely described below in conjunction with the embodiments.

[0029] Example

[0030] Figures 1 to 5 The structure diagram of a specific embodiment of the utility model is shown. A sensor device for measuring fluid pressure includes a measuring tube 1, an input port 2 fixedly connected to the top of the measuring tube 1, an output port 3 fixedly connected to the bottom of the measuring tube 1, a buffer structure 4 arranged inside the measuring tube 1, and a sensor device 5 arranged outside the measuring tube 1. The buffer structure 4 includes a throttle valve 41, a valve stem 42, a valve flap 43, and a rubber ring 44. The valve stem 42 is rotatably connected to the inside of the throttle valve 41 and extends to the inside of the measuring tube 1. The valve flap 43 is fixedly connected to the outside of the valve stem 42, and the rubber ring 44 is sleeved on the outside of the valve flap 43.

[0031] The throttle valve 41 is fixedly installed on the outside of the measuring tube 1 , and the valve stem 42 and the valve flap 43 are both rotatably connected to the inside of the measuring tube 1 .

[0032] Specifically, the outer diameter of the valve flap 43 matches the inner diameter of the rubber ring 44 , and the outer surface of the rubber ring 44 matches the inner diameter of the measuring tube 1 .

[0033] Under the sealing of the rubber ring 44, it is ensured that the measuring tube 1 can still maintain good sealing performance under high pressure difference.

[0034] When the fluid passes through the throttle valve 41, the valve flap 43 adjusts its position in the measuring tube 1 according to the fluid flow rate and pressure, thereby changing the cross-sectional area of ​​the flow channel to achieve the purpose of regulating the flow rate.

[0035] Figure 1 and Figure 3 In the figure, the sensing device 5 includes a mounting shell 51, an elastic diaphragm 52, a signal display screen 53, a displacement sensor 54, and a connecting line 55. The elastic diaphragm 52 is fixedly mounted inside the mounting shell 51, the signal display screen 53 is arranged on one side of the mounting shell 51, and the displacement sensor 54 is fixedly mounted outside the mounting shell 51 and is located on the outer surface of the elastic diaphragm 52.

[0036] The mounting shell 51 is fixedly connected to the outside of the measuring tube 1, and the connecting line 55 is fixedly connected between the displacement sensor 54 and the signal display screen 53. The model of the displacement sensor 54 is WDJ36F.

[0037] When the fluid pressure acts on the elastic diaphragm 52, the elastic diaphragm 52 undergoes a slight deformation, and the displacement sensor 54 detects the deformation degree of the elastic diaphragm 52 in real time, and converts it into an electrical signal for output through the connecting line 55. After being amplified, filtered and calibrated by the signal processing circuit, the electrical signal is converted into a specific value of the fluid pressure, and displayed on the signal display screen 53 for further processing, thereby achieving high-precision measurement of the fluid pressure.

[0038] Figure 1 and Figure 5 In the figure, a cleaning mechanism 6 is arranged on the outside of the mounting shell 51, and the cleaning mechanism 6 includes a mounting plate 61, a motor 62, a connecting rod 63, a scraper 64, and a cleaning brush 65. The mounting plate 61 is fixedly connected to the bottom of the mounting shell 51, the motor 62 is fixedly installed on the outside of the mounting plate 61, and the connecting rod 63 is fixedly connected to the output shaft of the motor 62.

[0039] Under the drive of the motor 62, the connecting rod 63 and the scraper 64 make a circular motion.

[0040] The scraper 64 is fixedly connected to one end of the connecting rod 63 away from the motor 62, and the cleaning brush 65 is fixedly connected to the back of the scraper 64 and abuts against the outer surface of the elastic diaphragm 52. When not in use, the cleaning brush 65 is located on the lower surface of the elastic diaphragm 52 to avoid affecting its elastic deformation.

[0041] By starting the motor 62 through the controller, the connecting rod 63, the scraper 64 and the cleaning brush 65 are transmitted and cooperated, so that the outer surface of the elastic diaphragm 52 can be cleaned regularly to prevent dust and dirt from affecting the measurement accuracy. High-precision pressure measurement can be achieved, and it has good durability and fast response capabilities, and is suitable for various fluid pressure measurement applications.

[0042] The above embodiments are only used to illustrate the technical solution of the present invention, but not to limit it.

Claims

1. A sensor device for measuring fluid pressure, comprising a measuring tube (1), an input port (2) fixedly connected to the top end of the measuring tube (1), an output port (3) fixedly connected to the bottom end of the measuring tube (1), a buffer structure (4) arranged inside the measuring tube (1), and a sensor device (5) arranged outside the measuring tube (1), characterized in that: The buffer structure (4) comprises a throttle valve (41), a valve stem (42), a valve flap (43), and a rubber ring (44); the valve stem (42) is rotatably connected to the inside of the throttle valve (41) and extends to the inside of the measuring tube (1); the valve flap (43) is fixedly connected to the outside of the valve stem (42); and the rubber ring (44) is sleeved on the outside of the valve flap (43); The sensor device (5) comprises a mounting shell (51), an elastic diaphragm (52), a signal display screen (53), a displacement sensor (54), and a connecting line (55); the elastic diaphragm (52) is fixedly mounted inside the mounting shell (51); the signal display screen (53) is arranged on one side of the mounting shell (51); and the displacement sensor (54) is fixedly mounted outside the mounting shell (51) and is located on the outer surface of the elastic diaphragm (52).

2. A sensor device for measuring fluid pressure according to claim 1, characterized in that: The throttle valve (41) is fixedly mounted on the outside of the measuring tube (1), and the valve stem (42) and the valve flap (43) are both rotatably connected to the inside of the measuring tube (1).

3. A sensor device for measuring fluid pressure according to claim 1, characterized in that: The outer diameter of the valve flap (43) matches the inner diameter of the rubber ring (44), and the outer surface of the rubber ring (44) matches the inner diameter of the measuring tube (1).

4. A sensor device for measuring fluid pressure according to claim 1, characterized in that: The mounting shell (51) is fixedly connected to the outside of the measuring tube (1), and the connecting line (55) is fixedly connected between the displacement sensor (54) and the signal display screen (53).

5. A sensor device for fluid pressure measurement according to claim 1, characterized in that: A cleaning mechanism (6) is arranged outside the mounting shell (51), and the cleaning mechanism (6) comprises a mounting plate (61), a motor (62), a connecting rod (63), a scraper (64), and a cleaning brush (65); the mounting plate (61) is fixedly connected to the bottom of the mounting shell (51), the motor (62) is fixedly mounted outside the mounting plate (61), and the connecting rod (63) is fixedly connected to the output shaft of the motor (62).

6. A sensor device for fluid pressure measurement according to claim 5, characterized in that: The scraper (64) is fixedly connected to an end of the connecting rod (63) away from the motor (62), and the cleaning brush (65) is fixedly connected to the back of the scraper (64) and abuts against the outer surface of the elastic diaphragm (52).

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