Fluid pressure measurement sensing device

Abstract

The utility model relates to the technical field of fluid pressure measurement, in particular to a fluid pressure measurement sensing device which comprises a measuring tube, an inlet end and an outlet end, the outlet end is fixedly connected to the lower end of the measuring tube, and a detachable structure of the fluid pressure measurement sensing device is arranged on the outer wall of the measuring tube. The outer side of the measuring tube is provided with a fluid pressure measuring elastic diaphragm protection structure. According to the fluid pressure measurement sensing device, when the sensor main body is installed, the sensor main body is tightly plugged into the sealing groove in a seam fit mode, then the outer buckling cover screwed through threads abuts against the sensor main body to achieve fixation, and therefore when the pressure intensity of fluid in the measuring pipe is too large and exceeds the bearing limit of the elastic membrane, the elastic membrane is fixed; the limiting block can abut against the exceeding deformation amount of the elastic membrane forwards, it is guaranteed that fluid leakage caused by breaking through the elastic membrane is avoided, the sensor body can be detached from the outer side of the measuring tube very conveniently, impurities, close to the inner wall of the measuring tube, of the elastic membrane can be cleaned, and the service life of the elastic membrane is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of fluid pressure measurement technology, specifically a fluid pressure measurement sensing device. Background Technology

[0002] Fluid pressure measurement refers to measuring the pressure difference of a fluid across a plane using specific instruments and methods. Fluid pressure can be defined as the force exerted on any unit area of ​​a plane within the fluid when there is no relative motion between the fluid on either side. From a microscopic perspective, pressure is the manifestation of the average force generated by the collision of molecules with the container walls.

[0003] For example, the authorization announcement number "CN222212052U" describes a fluid pressure measurement and sensing device. With the cooperation of a buffer structure and the sensing device, the valve disc adjusts its position within the measuring tube according to the fluid flow rate and pressure to achieve flow regulation. Existing fluid pressure measurement and sensing devices improve the accuracy of fluid pressure measurement by employing a structure that allows for cleaning and scrubbing of the elastic diaphragm on the inside. However, the area and range of the scraper driven by the motor are relatively limited, making it impossible to thoroughly clean the inside of the elastic diaphragm. Furthermore, because the fluid pressure measurement and sensing device needs to measure the pressure of different types of fluids, such as water or other materials, more and thicker debris adheres to the side of the elastic diaphragm closest to the inner wall of the measuring tube during the fluid pressure measurement process, which the scraper cannot reach. All of these factors contribute to a shorter lifespan for the elastic diaphragm in the fluid pressure measurement and sensing device.

[0004] Meanwhile, existing fluid pressure measurement sensors use a single throttle valve to control the flow of fluid inside the measuring tube. However, under standard fluid pressure measurement conditions, it is necessary to ensure that the fluid is in a static state when measuring fluid pressure, because the dynamic pressure in a flowing state will interfere with the measurement of static pressure, resulting in a difference between the total pressure and the static pressure. Existing fluid pressure measurement sensors will cause a decrease in measurement accuracy when measuring pressure of flowing fluid. Utility Model Content

[0005] The purpose of this invention is to solve the problems of short service life and decreased measurement accuracy of the elastic diaphragm in fluid pressure measurement sensing devices, and to propose a fluid pressure measurement sensing device.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] The utility model designs a fluid pressure measurement sensor device, which comprises a measuring pipe, an inlet end and an outlet end, the inlet end is fixedly connected to the top end of the measuring pipe, the outlet end is fixedly connected to the lower end of the measuring pipe, the outer wall of the measuring pipe is provided with a fluid pressure measurement sensor device detachable structure, the outer side of the measuring pipe is provided with a fluid pressure measurement elastic diaphragm protection structure, and the inner side of the measuring pipe is provided with a two-way throttling measurement structure.

[0008] Preferably, the fluid pressure measurement sensor device detachable structure comprises a sealing groove and an outer buckle cover, the sealing groove is sealingly connected to the outer wall of the measuring pipe, a measuring hole is fixedly connected to the rear side of the sealing groove, a threaded pipe is fixedly installed on the outer side of the sealing groove, and the outer buckle cover is threadedly connected to the outer side of the threaded pipe.

[0009] Preferably, the fluid pressure measurement elastic diaphragm protection structure comprises a sensor main body and a display screen, the sensor main body is movably clamped to the inner wall of the measuring pipe, the display screen is fixedly installed at the front end of the sensor main body, a displacement sensor is fixedly installed in the sensor main body, one end of the displacement sensor is fixedly connected with a wire, a fixed ring is fixedly installed at the rear side in the sensor main body, an elastic diaphragm is fixedly installed on the inner side of the fixed ring, the other end of the wire is electrically connected with the display screen, and a limiting block is fixedly installed on one side of the inner wall of the sensor main body.

[0010] Preferably, the rear side of the elastic diaphragm is electrically connected with the wire, the side wall of the elastic diaphragm is arranged opposite to the inner side of the measuring hole, and the outer wall end of the sensor main body is tightly abutted with the inner wall of the outer buckle cover.

[0011] Preferably, the two-way throttling measurement structure comprises a first throttling valve and a second throttling valve, the first throttling valve is fixedly installed above the pipe wall of the measuring pipe, the second throttling valve is fixedly installed below the pipe wall of the measuring pipe, an upper valve body is fixedly installed on the inner side of the first throttling valve, a lower valve body is fixedly installed on the inner side of the second throttling valve, and the upper valve body and the lower valve body are fixedly arranged at the two ends of the inner wall of the measuring pipe.

[0012] Preferably, the inlet end and the outlet end are provided with a pipeline installation structure outside, the pipeline installation structure comprises a connecting head and a fixing bolt, two connecting heads are installed outside the inlet end and the outlet end respectively, flanges are fixedly connected to the outer walls of the two connecting heads, and a plurality of fixing bolts are threadedly connected to the outer sides of the two flanges.

[0013] The utility model provides a fluid pressure measurement sensing device has beneficial effect at in the installation, the sensor main part is inserted to the inside of the sealed groove in strictness, then utilizes the outer buckle cover of screwing in tight and tight sensor main part realizes fixed, like this when the fluid pressure in the measuring pipe is too big and exceeds the elastic diaphragm bearing limit, the limiting block can resist the exceeding deformation of elastic diaphragm forward, guarantee not to break through elastic diaphragm and cause fluid leakage, like this sensor main part can very conveniently be dismantled outside the measuring pipe, then can clean the impurity of elastic diaphragm close to the inner wall of measuring pipe, improve the service life of elastic diaphragm.

[0014] When fluid pressure measurement is carried out, first, the inlet end is connected to the fluid conveying pipeline to be measured, then the second throttle valve is used to control the horizontal closing of the lower valve body, the fluid is throttled in the measuring pipe, then the first throttle valve is used to close the upper valve body, so that the fluid is left in the middle position of the measuring pipe, which is convenient for the fluid to press the elastic diaphragm arranged inside the measuring pipe, thereby completing the fluid pressure measurement. In this way, the static fluid is used to complete the pressure measurement process, which reduces the dynamic pressure in the flow state that interferes with the measurement of static pressure, and improves the measurement accuracy of the fluid pressure measurement sensing device. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a three-dimensional structure schematic diagram of the utility model;

[0016] Figure 2 It is Figure 1 the front view schematic diagram of cutting open;

[0017] Figure 3 It is Figure 1 the top view schematic diagram of cutting open;

[0018] Figure 4 It is Figure 2 the enlarged sectional view of A part in the middle;

[0019] Figure 5 It is Figure 2 the enlarged sectional view of B part in the middle;

[0020] Figure 6 It is Figure 2 the enlarged sectional view of C part in the middle.

[0021] In the figure: 1, measuring tube, 2, inlet end, 3, outlet end, 4, fluid pressure measurement sensor detachable structure, 41, sealing groove, 42, measuring hole, 43, threaded tube, 44, outer cover, 5, fluid pressure measurement elastic diaphragm protection structure, 51, sensor body, 52, displacement sensor, 53, wire, 54, display screen, 55, fixed ring, 56, elastic diaphragm, 57, limit block, 6, two-way throttling measurement structure, 61, first throttle valve, 62, upper valve body, 63, second throttle valve, 64, lower valve body, 7, pipeline mounting structure, 71, connector, 72, flange, 73, fixing bolt. DETAILED DESCRIPTION

[0022] The utility model will be further described below in combination with the drawings:

[0023] Example 1:

[0024] Please refer to Figures 1-6 In the embodiment, a fluid pressure measurement sensor device includes a measuring tube 1, an inlet end 2 and an outlet end 3, the inlet end 2 is fixedly connected to the top end of the measuring tube 1, the inlet end 2 is connected to the fluid conveying pipe, the outlet end 3 can discharge the fluid after measuring the fluid pressure, the outlet end 3 is fixedly connected to the lower end of the measuring tube 1, the outer wall of the measuring tube 1 is provided with a fluid pressure measurement sensor detachable structure 4, the outer side of the measuring tube 1 is provided with a fluid pressure measurement elastic diaphragm protection structure 5, and the inner side of the measuring tube 1 is provided with a two-way throttling measurement structure 6.

[0025] The fluid pressure measurement sensor detachable structure 4 includes a sealing groove 41 and an outer cover 44, the sealing groove 41 is sealingly connected to the outer wall of the measuring tube 1, the sealing groove 41 is made of stainless steel material embedded in the measuring tube 1 and has good sealing performance, the rear side of the sealing groove 41 is fixedly connected with a measuring hole 42, the measuring hole 42 is arranged on the side of the sealing groove 41 close to the inner wall of the measuring tube 1, so that the fluid passing through the inside of the measuring tube 1 can enter the measuring hole 42 to exert pressure on the sensor body 51 installed in the inside of the sealing groove 41, the outer side of the sealing groove 41 is fixedly installed with a threaded tube 43, and the outer cover 44 can be fixed by screwing the inner threads with the threaded tube 43, so that the outer cover 44 can press and fix the sensor body 51 in the inside of the sealing groove 41, and the outer cover 44 is screwedly connected to the outer side of the threaded tube 43.

[0026] The fluid pressure measuring elastic diaphragm protection structure 5 comprises a sensor body 51 and a display screen 54, the sensor body 51 is movably clamped on the inner wall of the measuring pipe 1, when installed, the sensor body 51 is tightly inserted into the inside of the sealing groove 41, then the outer cover 44 is screwed and tightly abuts against the sensor body 51 to realize fixation, the front end of the sensor body 51 is fixedly installed with the display screen 54, the display screen 54 is an LCD display screen, the inside of the sensor body 51 is fixedly installed with a displacement sensor 52, the model of the displacement sensor 54 is WDJ36F, the displacement sensor 52 is connected with the display screen 54 through a wire 53, so that the displacement sensor 52 can monitor the deformation amount of the elastic diaphragm 56, when the fluid pressure of the measuring pipe 1 acts on the elastic diaphragm 56, the elastic diaphragm 56 is slightly deformed, the displacement sensor 52 can detect the deformation degree of the elastic diaphragm 56 in real time, and convert it into an electric signal output through the wire 53, the electric signal is amplified, filtered and calibrated through a signal processing circuit, and then converted into a specific numerical value of the fluid pressure, and displayed on the signal display screen 54 for further processing, so as to realize high-precision measurement of the fluid pressure, one end of the displacement sensor 52 is fixedly connected with the wire 53, the inside of the rear side of the sensor body 51 is fixedly installed with a fixed ring 55, the fixed ring 55 is used for clamping and supporting the elastic diaphragm 56 on the inside, the inside of the fixed ring 55 is fixedly installed with the elastic diaphragm 56, the elastic diaphragm 56 is made of 316LSS stainless steel which is good in toughness and not easy to be damaged, the other end of the wire 53 is electrically connected with the display screen 54, the inner wall of the sensor body 51 is fixedly installed with a limiting block 57, the limiting block 57 is installed at one end of the inner wall of the sensor body 51, and the front end of the limiting block 57 is arranged opposite to the recessed position of the elastic diaphragm 56, so that when the fluid pressure in the measuring pipe 1 is too large and exceeds the bearing limit of the elastic diaphragm 56, the limiting block 57 can abut against the exceeding deformation amount of the elastic diaphragm 56 in front, so as to ensure that the elastic diaphragm 56 will not be broken and cause fluid leakage;

[0027] When installed, the sensor body 51 is tightly inserted into the inside of the sealing groove 41, then the outer cover 44 is screwed and tightly abuts against the sensor body 51 to realize fixation, and the front end of the limiting block 57 is arranged opposite to the recessed position of the elastic diaphragm 56, so that when the fluid pressure in the measuring pipe 1 is too large and exceeds the bearing limit of the elastic diaphragm 56, the limiting block 57 can abut against the exceeding deformation amount of the elastic diaphragm 56 in front, so as to ensure that the elastic diaphragm 56 will not be broken and cause fluid leakage, so that the sensor body 51 can be very conveniently disassembled outside the measuring pipe 1, and then the impurities close to the inner wall of the measuring pipe 1 of the elastic diaphragm 56 can be cleaned, and the service life of the elastic diaphragm is improved.

[0028] The rear side of the elastic diaphragm 56 is electrically connected with the wire 53, the side wall of the elastic diaphragm 56 is arranged opposite to the inside of the measuring hole 42, and the outer wall end of the sensor body 51 abuts against the inner wall of the outer cover 44.

[0029] The bidirectional throttling measurement structure 6 comprises a first throttle valve 61 and a second throttle valve 63, the first throttle valve 61 is fixedly installed above the pipe wall of the measurement pipe 1, the first throttle valve 61 and the second throttle valve 63 are both stainless steel metal throttle valves with the model L91H-40, the second throttle valve 63 is fixedly installed below the pipe wall of the measurement pipe 1, the first throttle valve 61 can control the upper valve body 62 to close the inside of the measurement pipe 1, the second throttle valve 63 can control the lower valve body 64 to close the inside lower end of the measurement pipe 1, when measuring the fluid pressure, first connect the inlet end 2 to the fluid conveying pipeline to be measured, then control the lower valve body 64 to be transversely closed by the second throttle valve 63, the fluid will be throttled in the measurement pipe 1, then close the upper valve body 62 by the first throttle valve 61, so that the fluid will be left in the middle position of the measurement pipe 1, which is convenient for the fluid to press the elastic diaphragm 56 arranged inside the measurement pipe 1, so as to complete the fluid pressure measurement, the inside of the first throttle valve 61 is fixedly installed with the upper valve body 62, the inside of the second throttle valve 63 is fixedly installed with the lower valve body 64, and the upper valve body 62 and the lower valve body 64 are both fixedly arranged at the two ends of the inner wall of the measurement pipe 1;

[0030] When measuring the fluid pressure, first connect the inlet end 2 to the fluid conveying pipeline to be measured, then control the lower valve body 64 to be transversely closed by the second throttle valve 63, the fluid will be throttled in the measurement pipe 1, then close the upper valve body 62 by the first throttle valve 61, so that the fluid will be left in the middle position of the measurement pipe 1, which is convenient for the fluid to press the elastic diaphragm 56 arranged inside the measurement pipe 1, so as to complete the fluid pressure measurement, so as to complete the pressure measurement process by using the static fluid, reduce the dynamic pressure in the flowing state which will interfere with the measurement of static pressure, and improve the measurement accuracy of the fluid pressure measurement sensor device.

[0031] Working principle:

[0032] The fluid pressure measurement sensor device is used for fluid experiment, the fluid experiment refers to the experiment of measuring the flow rate, flow and pressure parameters of different kinds of fluids in different working conditions, the fluid experiment is often used to study the physical properties of fluids, and it is particularly common in the learning of fluid mechanics, thermodynamics, water supply and drainage engineering and heating and ventilation engineering professional courses;

[0033] Sensor mounting structure of the fluid pressure measurement sensor device:

[0034] The sealing groove 41 is made of stainless steel material with good sealing performance embedded in the inside of the measuring tube 1. The rear side of the sealing groove 41 is fixedly connected with a measuring hole 42. The measuring hole 42 is arranged on the side of the sealing groove 41 close to the inner wall of the measuring tube 1. In this way, the fluid can enter the measuring hole 42 through the inside of the measuring tube 1 to exert pressure on the sensor body 51 installed in the inside of the sealing groove 41. The outer cover 44 can be fixed by screwing the inner thread with the threaded tube 43. In this way, the outer cover 44 can press and fix the sensor body 51 in the inside of the sealing groove 41.

[0035] Fluid pressure measurement operation of the fluid pressure measurement sensor device:

[0036] When the sensor body 51 is installed, it is tightly inserted into the inside of the sealing groove 41, and then the outer cover 44 is screwed to tightly press and fix the sensor body 51. When the fluid pressure of the measuring tube 1 acts on the elastic diaphragm 56, the elastic diaphragm 56 deforms slightly. The displacement sensor 52 detects the deformation degree of the elastic diaphragm 56 in real time and converts it into an electrical signal output through the wire 53. The electrical signal is amplified, filtered and calibrated by the signal processing circuit, and then converted into the specific value of the fluid pressure and displayed on the signal display screen 54 for further processing, so as to realize high-precision measurement of the fluid pressure.

[0037] The fixing ring 55 is used to clamp and support the elastic diaphragm 56 on the inside. The elastic diaphragm 56 is made of 316LSS stainless steel with good toughness and is not easy to break. The limiting block 57 is installed on one end of the inner wall of the sensor body 51. The front end of the limiting block 57 is arranged opposite to the recessed position of the elastic diaphragm 56. In this way, when the fluid pressure in the measuring tube 1 is too large and exceeds the bearing limit of the elastic diaphragm 56, the limiting block 57 can tightly press the exceeding deformation of the elastic diaphragm 56 forward to ensure that the elastic diaphragm 56 will not be broken and cause fluid leakage.

[0038] Resting measurement structure of the fluid pressure measurement sensor device:

[0039] Both the first throttle valve 61 and the second throttle valve 63 are made of stainless steel throttle valve with model L91H-40. The first throttle valve 61 can control the upper valve body 62 to close the inside of the measuring tube 1. The second throttle valve 63 can control the lower valve body 64 to close the lower end of the inside of the measuring tube 1. When measuring the fluid pressure, first connect the inlet end 2 to the fluid conveying pipeline to be measured, then use the second throttle valve 63 to control the lower valve body 64 to close horizontally. The fluid will be throttled in the measuring tube 1, and then the first throttle valve 61 is used to close the upper valve body 62. In this way, the fluid will be left in the middle position of the measuring tube 1, which is convenient for the fluid to press the elastic diaphragm 56 arranged on the inside of the measuring tube 1, so as to complete the fluid pressure measurement.

[0040] Example 2:

[0041] Please refer to Figures 1-6 In the embodiment, the fluid pressure measurement sensor device further comprises a pipeline mounting structure 7 arranged outside the inlet end 2 and the outlet end 3, the pipeline mounting structure 7 comprises connecting heads 71 and fixing bolts 73, the two connecting heads 71 are respectively arranged outside the inlet end 2 and the outlet end 3, the connecting heads 71 are made of stainless steel, two flanges 72 are fixed on the two sides of the inlet end 2 and the outlet end 3 through welding, the flanges 72 can be connected and tightly mounted with the fluid conveying pipeline through the multiple fixing bolts 73 outside the flanges 72, the fixing of the fluid pressure measurement sensor device in use is facilitated, the outer wall of the two connecting heads 71 is fixedly connected with the flanges 72, and the outer side of the two flanges 72 is threadedly connected with the multiple fixing bolts 73.

[0042] Working principle:

[0043] The two connecting heads 71 are respectively arranged outside the inlet end 2 and the outlet end 3, the connecting heads 71 are made of stainless steel, two flanges 72 are fixed on the two sides of the inlet end 2 and the outlet end 3 through welding, the flanges 72 can be connected and tightly mounted with the fluid conveying pipeline through the multiple fixing bolts 73 outside the flanges 72, the fixing of the fluid pressure measurement sensor device in use is facilitated.

[0044] Although the utility model has been illustrated and described through the reference preferred embodiment, but, the professional ordinary skilled person should understand, can make various various changes in form and detail within the scope of claims.

Claims

1. A fluid pressure measuring sensor device, comprising a measuring tube (1), an inlet end (2) and an outlet end (3), the inlet end (2) is fixedly connected to the top end of the measuring tube (1), the outlet end (3) is fixedly connected to the lower end of the measuring tube (1), characterized in that: The outer wall of the measuring pipe (1) is provided with a fluid pressure measurement sensor detachable structure (4), the outer side of the measuring pipe (1) is provided with a fluid pressure measurement elastic diaphragm protection structure (5), and the inner side of the measuring pipe (1) is provided with a two-way throttling measurement structure (6).

2. The fluid pressure measuring sensor apparatus of claim 1, wherein: The fluid pressure measurement sensor detachable structure (4) comprises a sealing groove (41) and an outer buckle cover (44), the sealing groove (41) is sealingly connected to the outer wall of the measuring pipe (1), the rear side of the sealing groove (41) is fixedly connected with a measuring hole (42), and the outer side of the sealing groove (41) is fixedly installed with a threaded pipe (43); the outer buckle cover (44) is threadedly connected to the outer side of the threaded pipe (43).

3. The fluid pressure measuring sensor apparatus of claim 1, wherein: The fluid pressure measurement elastic diaphragm protection structure (5) comprises a sensor body (51) and a display screen (54), the sensor body (51) is movably clamped on the inner wall of the measuring pipe (1), the front end of the sensor body (51) is fixedly installed with the display screen (54), the inside of the sensor body (51) is fixedly installed with a displacement sensor (52), one end of the displacement sensor (52) is fixedly connected with a wire (53), the inside of the rear side of the sensor body (51) is fixedly installed with a fixed ring (55), the inner side of the fixed ring (55) is fixedly installed with an elastic diaphragm (56), the other end of the wire (53) is electrically connected with the display screen (54), and the inner wall of the sensor body (51) is fixedly installed with a limiting block (57) on one side.

4. The fluid pressure measuring transducer of claim 3 wherein: The rear side of the elastic diaphragm (56) is electrically connected with the wire (53), the side wall of the elastic diaphragm (56) is arranged opposite to the inner side of the measuring hole (42), and the outer wall end of the sensor body (51) is tightly abutted with the inner wall of the outer buckle cover (44).

5. The fluid pressure measuring sensor apparatus of claim 1, wherein: The two-way throttling measurement structure (6) comprises a first throttling valve (61) and a second throttling valve (63), the first throttling valve (61) is fixedly installed above the pipe wall of the measuring pipe (1), the second throttling valve (63) is fixedly installed below the pipe wall of the measuring pipe (1), the inner side of the first throttling valve (61) is fixedly installed with an upper valve body (62), the inner side of the second throttling valve (63) is fixedly installed with a lower valve body (64), and the upper valve body (62) and the lower valve body (64) are fixedly arranged at the two ends of the inner wall of the measuring pipe (1).

6. The fluid pressure measuring sensor apparatus of claim 1, wherein: The outer side of the inlet end (2) and the outlet end (3) is provided with a pipeline installation structure (7), the pipeline installation structure (7) comprises a connecting head (71) and a fixing bolt (73), two connecting heads (71) are installed on the outer sides of the inlet end (2) and the outlet end (3) respectively, the outer walls of the two connecting heads (71) are fixedly connected with flanges (72), and the outer sides of the two flanges (72) are threadedly connected with a plurality of fixing bolts (73).

Images