Differential pressure liquid supply flow rate detection device

Abstract

The application belongs to the technical field of flow meters, and particularly relates to a differential pressure liquid supply flow detection device, which comprises a pipe body, a wedge-shaped block arranged in the middle of the inner cavity of the pipe body, and two symmetrical pressure-taking pipes communicated with the outer wall of the pipe body; the bottom edge of the wedge-shaped block and the cross section of the inner wall of the pipe body form a flow-through hole; the middle of the pipe body is provided with a connecting seat, and the connecting seat is internally slidably connected with an adjusting module; when the flow rate changes greatly, the wedge-shaped block and the gate plate can be used to adjust the area of the flow-through hole; when the flow rate increases, the flow rate sensor arranged in the pipe body can be used to identify the flow rate, and the gate plate can be indirectly controlled to slide upward through an electric signal, so that the differential pressure detected and calculated by the two pressure-taking pipes is prevented from being too large; when the flow rate decreases, the gate plate can be indirectly controlled to slide downward through an electric signal, so that the differential pressure calculated by the two pressure-taking pipes is increased, and the flow rate of low flow rate fluid can be accurately measured.

Description

Technical Field

[0001] This invention belongs to the field of flow meter technology, specifically a differential pressure liquid supply flow detection device. Background Technology

[0002] For flow detection of fluids containing solid particles, wedge flow meters are generally used. However, since the wedge opening angle of the wedge flow meter affects the detection range of the flow meter, if the flow rate of the fluid varies greatly, the flow meter with a fixed wedge opening angle may not be able to quickly and accurately identify and measure the change in the flow rate of the fluid. The analysis of the aforementioned existing technology reveals the following problems: Because the wedge opening angle of existing wedge flow meters is fixed, they cannot quickly identify and respond to large variations in fluid flow rate. In particular, for fluids with small flow rates, flow meters with fixed wedge opening angles may produce large detection errors.

[0003] Therefore, the present invention provides a differential pressure supply flow detection device. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0005] The technical solution adopted by the present invention to solve its technical problem is as follows: The differential pressure supply flow detection device of the present invention includes a tube body, a wedge block is provided in the middle of the inner cavity of the tube body, and two symmetrically arranged pressure tapping tubes are connected to the outer wall of the tube body; the bottom edge of the wedge block and the cross-section of the inner wall of the tube body form a flow hole; The feature is that a connecting seat is provided in the middle of the pipe body, and an adjustment module is slidably connected inside the connecting seat. The adjustment module is used to adjust the area of ​​the flow hole in the middle of the pipe body according to the flow rate. The adjustment module includes a gate plate, which is slidably connected inside the connecting seat and penetrates the bottom of the wedge block. When the flow velocity suddenly increases, the gate slides upward, the flow orifice area increases, and the differential pressure between the two pressure taps decreases. When the flow velocity suddenly decreases, the gate slides downward, the flow orifice area decreases, and the differential pressure between the two pressure taps increases, thus accurately measuring the flow rate of the low-velocity fluid.

[0006] Preferably, a docking plate is fixedly connected to the top of the connecting seat, and a connecting plate is provided on the docking plate. The connecting plate and the docking plate are connected by bolts. A sealing shell is fixedly connected to the connecting plate, and a hydraulic rod is fixedly connected to the top of the sealing shell. The output end of the hydraulic rod passes through the sealing shell and is fixedly connected to the gate. When the flow rate suddenly increases, the gate slides upward under the drive of the hydraulic rod. When the flow rate suddenly decreases, the gate slides downward under the drive of the hydraulic rod.

[0007] Preferably, the adjustment module further includes a vertical rod, which is fixedly connected to the top center of the gate plate. The vertical rod passes through the connecting seat and the docking plate, and is fixedly connected to the output end of the hydraulic rod inside the sealing shell.

[0008] Preferably, the wedge-shaped block has clearance grooves on both side walls, and a contact module is fixedly connected to the clearance groove via a screw. The contact module is used to record and output the pressure of the gate on the contact module during the up and down sliding of the gate, and to identify the wear condition of the gate.

[0009] Preferably, the touch module includes a mounting base with a movable groove inside. A third spring is fixedly connected to the bottom surface of the movable groove. The mounting groove is cylindrical, and a contact rod is slidably connected coaxially within the mounting groove. A limit rod is connected through the bottom of the contact rod, and the limit rod is slidably connected to a limit hole on the side wall of the mounting base. The two ends of the third spring are respectively fixed between the limit rod and the bottom surface of the movable groove. The end of the contact rod near the gate is configured as a spherical structure. When the gate slides in the connecting seat under the drive of the hydraulic rod, the spherical end of the contact rod contacts the surface of the gate and is squeezed.

[0010] Preferably, a water tank is fixedly connected to the top of the connecting plate, and a water pipe is connected to the bottom side of the water tank, with the water pipe extending through the connecting plate into the connecting seat.

[0011] Preferably, the top two sides of the gate are also fixedly connected to the squeezing rods; the bottom surface of the connecting plate is fixedly connected to the squeezing rods to the connecting pipe, the bottom of the connecting pipe is slidably connected to the piston rod, the connecting pipe is provided with a first spring inside, and the two ends of the first spring are fixedly connected between the top surface of the connecting pipe and the piston rod; one side of the connecting pipe is connected to an air pipe, and the air pipe passes through the connecting plate and connects to the top of the other side of the water tank; when the gate slides upward, the squeezing rod contacts and squeezes the piston rod, the piston rod compresses the first spring upward, and inflates the water tank through the air pipe, so that the water tank drains water through the water pipe into the connecting seat to clean the surface of the gate.

[0012] Preferably, the top of the gate is connected to a connecting pipe corresponding to the water pipe, and a diversion cavity is opened inside the gate. Multiple water outlets are opened on the surface of the gate, and the multiple water outlets are connected to the diversion cavity.

[0013] Preferably, a second spring is also fixedly connected between the gate and the connecting pipe. The two ends of the second spring are respectively fixedly connected to the bottom of the connecting pipe and the top of the gate, and the second spring is coaxial with the piston rod and the compression rod.

[0014] Preferably, a groove for a rubber strip is provided on the bottom surface of the connecting plate, the groove being used to fill the rubber strip and improve the sealing performance; a reinforcing rib is provided between the side wall of the connecting seat and the outer wall of the tube.

[0015] The beneficial effects of this invention are as follows: 1. The differential pressure supply flow detection device of the present invention adopts a gate that can slide in the connecting seat. When there is a large change in flow velocity, the flow orifice area can be adjusted by using a wedge block in conjunction with the gate. When the fluid flow velocity increases, the flow velocity sensor arranged in the pipe body can identify it and indirectly control the gate to slide upward through an electrical signal, thereby avoiding excessive differential pressure detected and calculated by the two pressure taps. When the fluid flow velocity decreases, the gate can be indirectly controlled to slide downward through an electrical signal, thereby increasing the differential pressure calculated by the two pressure taps, thus accurately measuring the flow rate of low-velocity fluid. 2. The differential pressure supply flow detection device of the present invention utilizes a contact module set on a wedge block. During the up-and-down displacement of the gate, the side wall of the gate can squeeze the contact module. Based on the pressure sensor integrated inside the contact module, the wear condition of the gate surface can be reflected. After the gate has been used for a period of time, its surface may be worn by solid particles flowing with the fluid, resulting in surface depression. When the gate contacts the contact module again, the pressure on the pressure sensor will inevitably be less than the initial maximum pressure value, thereby detecting the damage condition of the gate surface. Attached Figure Description

[0016] The invention will now be further described with reference to the accompanying drawings.

[0017] Figure 1 This is a perspective view of the present invention; Figure 2 This is a side view of the present invention; Figure 3 yes Figure 2 A cross-sectional view at position AA in the middle; Figure 4 yes Figure 3 Enlarged diagram of part a in the diagram; Figure 5 This is a partial cross-sectional view of the present invention; Figure 6 This is a perspective view of the adjustment module in this invention; Figure 7 This is a top view of the present invention; Figure 8 yes Figure 7 A cross-sectional view at position BB in the middle; Figure 9 yes Figure 8 Enlarged diagram of part b in the diagram; In the diagram: 1. Pipe body; 11. Pressure tapping pipe; 12. Connecting seat; 13. Reinforcing rib; 14. Butt joint plate; 15. Wedge block; 16. Relief groove; 2. Connecting plate; 21. Sealing shell; 22. Connecting pipe; 23. Piston rod; 24. First spring; 25. Second spring; 26. Rubber strip groove; 3. Hydraulic rod; 4. Water tank; 41. Air pipe; 42. Water pipe; 5. Touch module; 51. Mounting seat; 52. Third spring; 53. Limiting rod; 54. Contact rod; 55. Movable groove; 6. Adjustment module; 61. Vertical rod; 62. Gate plate; 63. Butt joint pipe; 64. Extrusion rod; 65. Water outlet. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0019] like Figures 1 to 9 As shown in the figure, a differential pressure supply flow detection device according to an embodiment of the present invention includes a tube body 1, a wedge block 15 is provided in the middle of the inner cavity of the tube body 1, and two symmetrically arranged pressure tapping tubes 11 are connected to the outer wall of the tube body 1; the bottom edge of the wedge block 15 and the cross-section of the inner wall of the tube body 1 form a flow hole; The feature is that a connecting seat 12 is provided in the middle of the pipe body 1, and an adjustment module 6 is slidably connected inside the connecting seat 12. The adjustment module 6 is used to adjust the area of ​​the flow hole in the middle of the pipe body 1 according to the flow rate. The adjustment module 6 includes a gate plate 62, which is slidably connected inside the connecting seat 12 and penetrates the bottom of the wedge block 15. When the flow velocity suddenly increases, the gate 62 slides upward, the flow orifice area increases, and the differential pressure between the two pressure taps 11 decreases. When the flow velocity suddenly decreases, the gate 62 slides downward, the flow orifice area decreases, and the differential pressure between the two pressure taps 11 increases, thus accurately measuring the flow rate of the low-velocity fluid.

[0020] Wedge flow meters are generally used in the field of fluid flow detection containing solid particles. For such fluids, the fixed wedge block 15 structure of the wedge flow meter can improve the service life of the flow meter. However, in actual applications, since the fluid flow rate is not constant, when there is a significant change in the fluid flow rate, the fixed wedge opening angle flow meter may have a large error in the flow detection of smaller fluid flows due to its range limitation, or the flow rate change may not be responded to in time when the flow rate is below a certain value. To address the above problems, this embodiment uses a gate 62 that can slide in the connecting seat 12. When there is a significant change in flow velocity, the wedge block 15 can be used in conjunction with the gate 62 to adjust the flow orifice area. Simply put, when the fluid flow velocity increases, it can be detected by the flow velocity sensor arranged in the pipe body 1. The gate 62 is indirectly controlled to slide upward by an electrical signal, thereby avoiding excessive differential pressure detected and calculated by the two pressure taps 11. When the fluid velocity decreases, the gate 62 can be indirectly controlled to slide downward by an electrical signal, thereby increasing the differential pressure calculated by the two pressure taps 11, thus accurately measuring the flow rate of low-velocity fluid. Compared with the fixed wedge flow meter in the prior art, the wedge flow meter disclosed in this embodiment has a sliding gate 62 in the middle of the wedge block 15. When the gate 62 is completely retracted in the connecting seat 12, it is the same as the fixed wedge flow meter in the prior art. When the gate 62 extends to the outside of the bottom edge of the wedge block 15, the flow hole is re-formed by the bottom edge of the wedge block 15, the bottom edge of the gate 62, and the cross-section of the inner wall of the pipe body 1. Therefore, the more the gate 62 slides downward, the smaller the area of ​​the connecting hole becomes, and vice versa. It is worth noting that this embodiment also includes a flow velocity sensor arranged inside the pipe body 1, which is mainly used to monitor the fluid flow velocity and output an electrical signal according to the fluid flow velocity. Different electrical signals are used to indirectly control the gate 62 to move upward or downward. Multiple flow velocity sensors are provided, and at least one flow velocity sensor is arranged directly below the inner wall of the pipe body 1.

[0021] like Figures 1 to 5 As shown, a docking plate 14 is fixedly connected to the top of the connecting seat 12, and a connecting plate 2 is provided on the docking plate 14. The connecting plate 2 and the docking plate 14 are connected by bolts. A sealing shell 21 is fixedly connected to the connecting plate 2, and a hydraulic rod 3 is fixedly connected to the top of the sealing shell 21. The output end of the hydraulic rod 3 passes through the sealing shell 21 and is fixedly connected to the gate plate 62. When the flow rate suddenly increases, the gate plate 62 slides upward under the drive of the hydraulic rod 3. When the flow rate suddenly decreases, the gate plate 62 slides downward under the drive of the hydraulic rod 3.

[0022] like Figures 1 to 6As shown, the adjustment module 6 also includes a vertical rod 61, which is fixedly connected to the top middle of the gate plate 62. The vertical rod 61 passes through the connecting seat 12 and the docking plate 14, and is fixedly connected to the output end of the hydraulic rod 3 inside the sealing shell 21.

[0023] As indicated in the above embodiments, the size of the flow orifice is controlled by the gate 62 according to the change in fluid velocity, thereby compensating for the large error in the flow detection of low-velocity fluid caused by the fixed wedge block 15. In this embodiment, the gate 62 is driven to slide upward or downward by the hydraulic rod 3. Considering the sealing problem, a docking plate 14 is provided on the top of the connecting seat 12 in this embodiment, and a sealing shell 21 is also provided on the connecting plate 2. The hydraulic rod 3 is located on the top of the sealing shell 21, with only the output end penetrating inside the sealing shell 21. Therefore, when the gate 62 needs to slide upward or downward, good sealing can be maintained.

[0024] In addition, in this embodiment, in order to better control the sealing performance, a vertical rod 61 is provided at the top of the gate plate 62, and the vertical rod 61 extends through the connecting seat 12 into the sealing shell 21. The bottom of the hydraulic rod 3 is fixed to the top of the vertical rod 61 in the sealing shell 21. That is to say, during the process of the hydraulic rod 3 controlling the up and down displacement of the gate plate 62, the connection part between the hydraulic rod 3 and the vertical rod 61 slides in the sealing shell 21.

[0025] like Figures 1 to 4 As shown, the wedge block 15 has clearance grooves 16 on both side walls, and a contact module 5 is fixedly connected to the clearance groove 16 by a screw. The contact module 5 is used to record and output the pressure of the gate 62 on the contact module 5 during the up and down sliding process of the gate 62, and to identify the wear condition of the gate 62.

[0026] While the flow detection device performs its function, since wedge flow meters are commonly used for flow detection of fluids containing solid particles, the solid particles will contact the wedge block 15 as the fluid passes through the flow detection device, causing wear on the wedge block 15. It is foreseeable that the fixed structure of the wedge block 15 can resist the long-term wear of solid particles, giving the flow meter a longer service life. Other similar flow meters may be more easily damaged. In this embodiment, to prevent the gate 62 from being damaged due to prolonged friction with solid particles, which could lead to significant errors in flow detection, it is necessary to monitor the usage of the gate 62. A contact module 5 is installed using the clearance groove 16 provided on the wedge block 15. During the up-and-down movement of the gate 62, the side wall of the gate 62 can squeeze the contact module 5. Based on the pressure sensor integrated inside the contact module 5, the pressure of the gate 62 can be reflected. 2. Regarding the surface wear condition, specifically, when the gate 62 initially presses against the touch module 5, it will output a stable value based on the pressure sensor. This value can be used as the maximum pressure value generated by the gate 62 on the touch module 5. After a period of use, the surface of the gate 62 may be worn by solid particles flowing with the fluid, resulting in surface depression. At this time, when the gate 62 contacts the touch module 5 again, the pressure it exerts on the pressure sensor will inevitably be less than the initial maximum pressure value. This allows the detection of the damage condition of the gate 62 surface. Based on the settings, a pressure threshold can be set. When the pressure value is less than the pressure threshold, it indicates that the gate 62 is severely worn. Furthermore, in this embodiment, two touch modules 5 are symmetrically arranged. When the two touch modules 5 contact the gate 62, they may generate different pressure values ​​due to different wear conditions. If the wear on either side exceeds the pressure threshold, it indicates that the wear is severe and the gate 62 needs to be replaced. When detecting the pressure value exerted by the gate 62 on the contact module 5, it is necessary to ensure a single variable, that is, to control different detection times, such as once a week, while keeping other variables constant, such as controlling the specific position. The point of contact between the gate 62 and the contact module 5 can be controlled based on the hydraulic rod 3. It is also important to note that the point should be controlled as low as possible below the gate 62 to make it easier to obtain the wear condition of the gate 62.

[0027] like Figures 1 to 4 As shown, the touch module 5 includes a mounting base 51, with a movable groove 55 inside the mounting base 51. A third spring 52 is fixedly connected to the bottom surface of the movable groove 55. The mounting groove is cylindrical, and a contact rod 54 is slidably connected coaxially within the mounting groove. A limit rod 53 is connected through the bottom of the contact rod 54, and the limit rod 53 is slidably connected in a limit hole on the side wall of the mounting base 51. The two ends of the third spring 52 are respectively fixed between the limit rod 53 and the bottom surface of the movable groove 55. The end of the contact rod 54 near the gate plate 62 is configured as a spherical structure. When the gate plate 62 slides in the connecting seat 12 under the drive of the hydraulic rod 3, the spherical end of the contact rod 54 contacts the surface of the gate plate 62 and is squeezed.

[0028] It is worth noting that in this embodiment, the touch module 5 also includes a pressure sensor, which is located on the bottom surface of the movable groove 55 and is in direct contact with the third spring 52. When the gate 62 is displaced, the surface of the gate 62 will press the contact rod 54, causing the contact rod 54 to retract inward. At this time, the contact rod 54 will press the third spring 52 and transmit the pressure to the pressure sensor. The pressure sensor is used to obtain the pressure value of the gate 62 on the touch module 5, and the gate 62 is determined to be severely worn based on the comparison between the pressure value and the pressure threshold. In addition, in this embodiment, the contact rod 54 is slidably connected to the limiting hole on the side wall of the mounting base 51 based on the fiber rod, which ensures that the contact rod 54 can be displaced along the axis of the movable groove 55 when it is pressed by the side wall of the gate 62, avoiding off-axis compression and causing pressure sensor reading errors. In addition, the end of the contact rod 54 is set as a spherical structure, which can better contact the side wall of the gate 62 without affecting the displacement of the gate 62.

[0029] like Figures 1 to 5 , Figures 8 to 9 As shown, a water tank 4 is fixedly connected to the top of the connecting plate 2, and a water pipe 42 is connected to the bottom of one side of the water tank 4, and the water pipe 42 extends through the connecting plate 2 into the connecting seat 12.

[0030] like Figures 1 to 5 , Figures 8 to 9 As shown, the top two sides of the gate plate 62 are also fixedly connected to the pressing rods 64; the bottom surface of the connecting plate 2 is fixedly connected to the pressing rods 64 via a connecting pipe 22, and the bottom of the connecting pipe 22 is slidably connected to a piston rod 23. A first spring 24 is provided inside the connecting pipe 22, and the two ends of the first spring 24 are fixedly connected between the top surface of the connecting pipe 22 and the piston rod 23; one side of the top of the connecting pipe 22 is connected to an air pipe 41, and the air pipe 41 passes through the connecting plate 2 and connects to the top of the other side of the water tank 4; when the gate plate 62 slides upward, the pressing rods 64 contact and press the piston rod 23, the piston rod 23 compresses the first spring 24 upward, and inflates the water tank 4 through the air pipe 41, so that the water tank 4 drains water through the water pipe 42 into the connecting seat 12 to clean the surface of the gate plate 62.

[0031] As mentioned above, since the wedge flow meter is mainly used for flow detection of fluids containing solid particles, both the wedge block 15 and the gate 62 are easily worn by particle impact. Furthermore, since the gate 62 and the wedge block 15 are in a relative sliding relationship, particles may adhere to the surface of the gate 62 and enter the wedge block 15 with the gate 62, causing wear on the bottom opening of the wedge block 15, and even disrupting the axial alignment of the gate 62 and the hydraulic rod 3, causing the gate 62 to deviate from its axis. Under the subsequent driving effect of the hydraulic rod 3, it cannot accurately pass through the wedge block 15, causing jamming. To address the above situation, in this embodiment, when the gate 62 moves upward, it indicates that the gate 62 is about to retract into the wedge block 15. At this time, the pressing rod 64 at the top of the gate 62 will press the piston rod 23, causing the piston rod 23 to retract inward into the connecting pipe 22. Since the connecting pipe 22 is filled with air, the air can be forced into the top of the water tank 4 through the air pipe 41. When the air is forced into the top of the water tank 4, the internal pressure of the water tank 4 increases, thereby forcing the water tank 4 to squeeze out some water through the water pipe 42, thus flushing the gate 62. The top of the water tank 4 is equipped with a one-way valve. Whenever the squeezing rod 64 disengages from the piston rod 23 and the piston rod 23 resets under the action of the first spring 24, it will draw away some air from the inside of the water tank 4. At this time, the top of the water tank 4 will draw air from the atmosphere through the one-way valve, so that the inside of the water tank 4 will reset to atmospheric pressure. When the squeezing rod 64 squeezes the piston rod 23 again with the gate 62, it will press the piston rod 23 back into the connecting pipe 22 and squeeze some air into the water tank 4, thereby gradually emptying the water inside the water tank 4 and flushing the gate 62. When the water in the water tank 4 is insufficient, it can be manually filled.

[0032] like Figures 1 to 9 As shown, the top of the gate 62 is connected to the water pipe 42 via a connecting pipe 63, and a diversion cavity is provided inside the gate 62. Multiple water outlets 65 are provided on the surface of the gate 62, and the multiple water outlets 65 are connected to the diversion cavity.

[0033] Furthermore, when water is discharged downwards from the water pipe 42, the connecting pipe 63 can receive the water and guide it, so that the water fills the diversion cavity and is discharged through the water outlet 65 opened on the surface of the gate 62. Based on the setting of multiple water outlets 65, the surface of the gate 62 can be fully rinsed.

[0034] like Figures 1 to 5 As shown, a second spring 25 is also fixed between the gate 62 and the connecting pipe 22. The two ends of the second spring 25 are respectively fixed to the bottom of the connecting pipe 22 and the top of the gate 62, and the second spring 25 is coaxial with the piston rod 23 and the compression rod 64.

[0035] In this embodiment, the second spring 25 provided between the gate 62 and the connecting pipe 22 can assist the gate 62 to slide down quickly when the fluid flow rate decreases, thereby quickly responding to the low flow rate monitoring of the fluid.

[0036] like Figures 1 to 5 As shown, a groove 26 for adhesive strips is provided on the bottom surface of the connecting plate 2. The groove 26 is used to fill the adhesive strips and improve the sealing performance. A reinforcing rib 13 is provided between the side wall of the connecting seat 12 and the outer wall of the tube body 1.

[0037] Working principle: A gate 62 that slides within the connecting seat 12 is used. When there are significant changes in flow velocity, the wedge block 15, in conjunction with the gate 62, can adjust the flow orifice area. Simply put, when the fluid velocity increases, the flow velocity sensor located within the pipe 1 detects this and indirectly controls the gate 62 to slide upwards via an electrical signal. This prevents the differential pressure detected and calculated by the two pressure taps 11 from becoming too large. Conversely, when the fluid velocity decreases, the gate 62 can be indirectly controlled to slide downwards via an electrical signal, thereby increasing the differential pressure calculated by the two pressure taps 11, thus ensuring accurate flow. To accurately measure the flow rate of low-velocity fluids, compared to the fixed wedge flow meters in the prior art, the wedge flow meter disclosed in this embodiment has a sliding gate 62 in the middle of the wedge block 15. When the gate 62 is fully retracted into the connecting seat 12, it works on the same principle as the fixed wedge flow meter in the prior art. When the gate 62 extends to the outside of the bottom edge of the wedge block 15, the flow hole is re-formed by the bottom edge of the wedge block 15, the bottom edge of the gate 62, and the cross-section of the inner wall of the pipe body 1. Therefore, the more the gate 62 slides downward, the smaller the area of ​​the flow hole becomes, and vice versa. It is worth noting that this embodiment also includes a flow velocity sensor arranged inside the pipe body 1, which is mainly used to monitor the fluid flow velocity and output an electrical signal according to the fluid flow velocity. Different electrical signals are used to indirectly control the gate 62 to move upward or downward. Multiple flow velocity sensors are provided, and at least one flow velocity sensor is arranged directly below the inner wall of the pipe body 1. The gate 62 is used to control the size of the flow hole area according to the change of fluid flow velocity, thereby compensating for the large error in the flow monitoring of low-flow-velocity fluid caused by the fixed wedge block 15. In this embodiment, a hydraulic rod 3 is used to drive the gate 62 to slide upward or downward. Considering the sealing problem, a docking plate 14 is provided on the top of the connecting seat 12 in this embodiment, and a sealing shell 21 is also provided on the connecting plate 2. The hydraulic rod 3 is located on the top of the sealing shell 21, with only the output end penetrating inside the sealing shell 21. Therefore, when the gate 62 needs to slide upward or downward, good sealing can be maintained.

[0038] To better control the sealing performance, a vertical rod 61 is provided at the top of the gate plate 62, and the vertical rod 61 extends through the connecting seat 12 into the sealing shell 21. The bottom of the hydraulic rod 3 is fixed to the top of the vertical rod 61 inside the sealing shell 21. That is to say, during the process of the hydraulic rod 3 controlling the up and down movement of the gate plate 62, the connection between the hydraulic rod 3 and the vertical rod 61 slides inside the sealing shell 21.

[0039] While the flow detection device performs its function, since wedge flow meters are commonly used for flow detection of fluids containing solid particles, the solid particles will contact the wedge block 15 as the fluid passes through the flow detection device, causing wear on the wedge block 15. It is foreseeable that the fixed structure of the wedge block 15 can resist the long-term wear of solid particles, giving the flow meter a longer service life. Other similar flow meters may be more easily damaged. In this embodiment, to prevent the gate 62 from being damaged due to prolonged friction with solid particles, which could lead to significant errors in flow detection, it is necessary to monitor the usage of the gate 62. A contact module 5 is installed using the clearance groove 16 provided on the wedge block 15. During the up-and-down movement of the gate 62, the side wall of the gate 62 can squeeze the contact module 5. Based on the pressure sensor integrated inside the contact module 5, the pressure of the gate 62 can be reflected. 2. Regarding the surface wear condition, specifically, when the gate 62 initially presses against the touch module 5, it will output a stable value based on the pressure sensor. This value can be used as the maximum pressure value generated by the gate 62 on the touch module 5. After a period of use, the surface of the gate 62 may be worn by solid particles flowing with the fluid, resulting in surface depression. At this time, when the gate 62 contacts the touch module 5 again, the pressure it exerts on the pressure sensor will inevitably be less than the initial maximum pressure value. This allows the detection of the damage condition of the gate 62 surface. Based on the settings, a pressure threshold can be set. When the pressure value is less than the pressure threshold, it indicates that the gate 62 is severely worn. Furthermore, in this embodiment, two touch modules 5 are symmetrically arranged. When the two touch modules 5 contact the gate 62, they may generate different pressure values ​​due to different wear conditions. If the wear on either side exceeds the pressure threshold, it indicates that the wear is severe and the gate 62 needs to be replaced. When detecting the pressure value exerted by the gate 62 on the contact module 5, it is necessary to ensure a single variable, that is, to control different detection times, such as once a week, while keeping other variables constant, such as controlling the specific position. The point of contact between the gate 62 and the contact module 5 can be controlled based on the hydraulic rod 3. It is also important to note that the point should be controlled as low as possible below the gate 62 to make it easier to obtain the wear condition of the gate 62.

[0040] The touch module 5 also includes a pressure sensor, which is located on the bottom surface of the movable groove 55 and is in direct contact with the third spring 52. When the gate 62 is displaced, the surface of the gate 62 will press the contact rod 54, causing the contact rod 54 to retract inward. At this time, the contact rod 54 will press the third spring 52 and transmit the pressure to the pressure sensor. The pressure sensor is used to obtain the pressure value of the gate 62 on the touch module 5, and the gate 62 is determined to be severely worn based on the comparison between the pressure value and the pressure threshold. In addition, in this embodiment, the contact rod 54 is slidably connected to the limiting hole on the side wall of the mounting base 51 based on the fiber rod, which ensures that the contact rod 54 can be displaced along the axis of the movable groove 55 when it is pressed by the side wall of the gate 62, avoiding off-axis compression and causing pressure sensor reading errors. In addition, the end of the contact rod 54 is set as a spherical structure, which can better contact the side wall of the gate 62 without affecting the displacement of the gate 62. Since wedge flow meters are mainly used for flow detection of fluids containing solid particles, both the wedge block 15 and the gate 62 are easily worn by particle impact. Furthermore, because the gate 62 and the wedge block 15 slide relative to each other, particles may adhere to the surface of the gate 62 and enter the wedge block 15, causing wear on the bottom opening of the wedge block 15 and even disrupting the axial alignment of the gate 62 and the hydraulic rod 3. This can lead to the gate 62 becoming misaligned, and under the subsequent driving effect of the hydraulic rod 3, it cannot accurately pass through the wedge block 15, causing jamming. To address this, in this embodiment, when the gate 62 moves upward, it indicates that the gate 62 is about to retract into the wedge block 15. At this time, the pressing rod 64 at the top of the gate 62 will press the piston rod 23, causing the piston rod 23 to retract inward into the connecting pipe 22. The connecting pipe 22 is filled with air, so the air can be squeezed into the top of the water tank 4 through the air pipe 41. When the air is squeezed into the top of the water tank 4, the internal pressure of the water tank 4 increases, thereby forcing the water tank 4 to squeeze out some water through the water pipe 42, thus flushing the gate 62. The top of the water tank 4 is equipped with a one-way valve. Whenever the squeezing rod 64 disengages from the piston rod 23 and the piston rod 23 returns to its original position under the action of the first spring 24, it will draw away some air from the inside of the water tank 4. At this time, the top of the water tank 4 will draw air from the atmosphere through the one-way valve, so that the internal pressure of the water tank 4 will return to atmospheric pressure. When the squeezing rod 64 squeezes the piston rod 23 again with the gate 62, it will press the piston rod 23 back into the connecting pipe 22 and squeeze some air into the water tank 4, thereby gradually emptying the water inside the water tank 4 and flushing the gate 62. When the water in the water tank 4 is insufficient, it can be manually filled.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A differential pressure supply flow detection device, comprising a tube body (1), wherein a wedge block (15) is provided in the middle of the inner cavity of the tube body (1), and two symmetrically arranged pressure tapping tubes (11) are connected to the outer wall of the tube body (1); the bottom edge of the wedge block (15) and the cross-section of the inner wall of the tube body (1) form a flow hole; Its features are, A connecting seat (12) is provided in the middle of the pipe body (1), and an adjustment module (6) is slidably connected inside the connecting seat (12). The adjustment module (6) is used to adjust the area of ​​the flow hole in the middle of the pipe body (1) according to the flow rate. The adjustment module (6) includes a gate (62), which is slidably connected inside the connecting seat (12) and penetrates the bottom of the wedge block (15). When the flow rate suddenly increases, the gate (62) slides upward, the flow orifice area increases, and the differential pressure between the two pressure taps (11) decreases. When the flow rate suddenly decreases, the gate (62) slides downward, the flow orifice area decreases, and the differential pressure between the two pressure taps (11) increases, thus accurately measuring the flow rate of the low-velocity fluid.

2. The differential pressure supply flow rate detection device according to claim 1, characterized in that: The top of the connecting seat (12) is fixedly connected to a docking plate (14), and a connecting plate (2) is provided on the docking plate (14). The connecting plate (2) and the docking plate (14) are connected by bolts. A sealing shell (21) is fixedly connected to the connecting plate (2), and a hydraulic rod (3) is fixedly connected to the top of the sealing shell (21). The output end of the hydraulic rod (3) passes through the sealing shell (21) and is fixedly connected to the gate (62). When the flow rate suddenly increases, the gate (62) slides upward under the drive of the hydraulic rod (3). When the flow rate suddenly decreases, the gate (62) slides downward under the drive of the hydraulic rod (3).

3. The differential pressure supply flow rate detection device according to claim 2, characterized in that: The adjustment module (6) also includes a vertical rod (61), which is fixedly connected to the top middle of the gate plate (62). The vertical rod (61) passes through the connecting seat (12) and the docking plate (14), and is fixedly connected to the output end of the hydraulic rod (3) inside the sealing shell (21).

4. The differential pressure supply flow rate detection device according to claim 3, characterized in that: The wedge block (15) has clearance grooves (16) on both sides of its sidewalls, and a contact module (5) is fixedly connected to the clearance groove (16) by a screw. The contact module (5) is used to record and output the pressure of the gate (62) on the contact module (5) during the sliding of the gate (62) up and down, and to identify the wear condition of the gate (62).

5. The differential pressure supply flow rate detection device according to claim 4, characterized in that: The touch module (5) includes a mounting base (51), which has a movable groove (55) inside. A third spring (52) is fixedly connected to the bottom surface of the movable groove (55). The mounting groove is cylindrical and a contact rod (54) is slidably connected to it in the same direction. A limit rod (53) is connected through the bottom of the contact rod (54), and the limit rod (53) is slidably connected to the limit hole on the side wall of the mounting base (51). The two ends of the third spring (52) are respectively fixed between the limit rod (53) and the bottom surface of the movable groove (55). The end of the contact rod (54) near the gate (62) is set as a spherical structure. When the gate (62) slides in the connecting seat (12) under the drive of the hydraulic rod (3), the spherical end of the contact rod (54) contacts the surface of the gate (62) and is squeezed.

6. The differential pressure supply flow rate detection device according to claim 5, characterized in that: A water tank (4) is fixed to the top of the connecting plate (2), and a water pipe (42) is connected to the bottom of one side of the water tank (4), and the water pipe (42) extends through the connecting plate (2) into the connecting seat (12).

7. The differential pressure supply flow rate detection device according to claim 6, characterized in that: The top two sides of the gate (62) are also fixedly connected to the squeezing rod (64); the bottom surface of the connecting plate (2) is fixedly connected to the squeezing rod (64) and the bottom of the connecting pipe (22) is slidably connected to the piston rod (23). The connecting pipe (22) is provided with a first spring (24), and the two ends of the first spring (24) are fixed between the top surface of the connecting pipe (22) and the piston rod (23); the top of one side of the connecting pipe (22) is connected to the air pipe (41), and the air pipe (41) passes through the connecting plate (2) and connects to the top of the other side of the water tank (4); when the gate (62) slides upward, the squeezing rod (64) contacts and squeezes the piston rod (23), the piston rod (23) compresses the first spring (24) upward, and inflates the water tank (4) through the air pipe (41), so that the water tank (4) drains water through the water pipe (42) into the connecting seat (12) to clean the surface of the gate (62).

8. The differential pressure supply flow rate detection device according to claim 7, characterized in that: The top of the gate (62) is connected to the water pipe (42) via a connecting pipe (63), and a diversion cavity is provided inside the gate (62). Multiple water outlets (65) are provided on the surface of the gate (62), and the multiple water outlets (65) are connected to the diversion cavity.

9. The differential pressure supply flow rate detection device according to claim 8, characterized in that: A second spring (25) is also fixed between the gate (62) and the connecting pipe (22). The two ends of the second spring (25) are fixed to the bottom of the connecting pipe (22) and the top of the gate (62), respectively. The second spring (25) is coaxial with the piston rod (23) and the compression rod (64).

10. The differential pressure supply flow rate detection device according to claim 9, characterized in that: The bottom surface of the connecting plate (2) is provided with a rubber strip groove (26), which is used to fill the rubber strip and improve the sealing performance; a reinforcing rib (13) is provided between the side wall of the connecting seat (12) and the outer wall of the tube body (1).

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