Intelligent differential pressure flowmeter

Abstract

The application relates to the technical field of differential pressure flow meters, in particular to an intelligent differential pressure flow meter which comprises a diaphragm box, a meter head, a mounting structure, a three-valve group, a throttling structure, a sliding-out structure, a fixing structure and a butt joint structure. The mounting structure is arranged to facilitate flexible adjustment of the angle and position of the mounting piece, facilitate alignment of the mounting piece with the nearby pipeline, realize support of the diaphragm box and the meter head, avoid suspension of the diaphragm box and the meter head, improve stability, and facilitate quick butt joint of the throttling piece and the conveying pipeline in cooperation with the butt joint structure, and facilitate quick dismounting of the throttling piece from the conveying pipeline, so that the intelligent differential pressure flow meter is high in flexibility. The sliding-out structure is arranged to facilitate quick replacement of the orifice plate with different apertures, avoid the problem that the throttling piece needs to be dismounted as a whole and screwed repeatedly during replacement, and is high in practicability and easy to operate.

Description

Technical Field

[0001] This invention relates to the field of differential pressure flow meter technology, specifically to an intelligent differential pressure flow meter. Background Technology

[0002] A differential pressure flow meter is a flow measurement instrument that uses a throttling device to create a differential pressure in a fluid and calculates the flow rate by measuring the differential pressure value. It mainly works by creating a static pressure difference between the upstream and downstream of the throttling element, and then introducing the differential pressure into the diaphragm assembly through a pressure-sensing pipeline. The information is then uploaded to the main board for centralized processing. By measuring the differential pressure value and combining it with parameters such as the fluid's temperature, pressure, and density, the flow rate of the fluid can be calculated. It is commonly used for flow rate calculation of fluids such as natural gas, coal gas, and steam.

[0003] Traditional differential pressure flow meters require the throttling element to be installed on the pipeline first, and then the throttling element to be connected to the meter assembly through the pressure tap. The throttling element is often fixed by welding or by a flange during installation, which is inconvenient to disassemble. If it is fixed by a flange, the bolts need to be repeatedly removed, making the operation process cumbersome.

[0004] If the actual flow rate of the fluid in the pipeline changes significantly during the use of a differential pressure flow meter, the orifice diameter of the orifice plate inside the throttling element may be too large or too small, resulting in a weak differential pressure signal or a differential pressure value exceeding the flow meter's range. Therefore, it is necessary to replace the orifice plate with one of different orifice diameters. However, the orifice plate is often clamped by a flange and fastened with bolts to the center of the throttling element. Therefore, when replacing or repairing the orifice plate, it is necessary to first remove the flange and repeatedly tighten the bolts, which is a cumbersome process and has low replacement efficiency.

[0005] To avoid the meter assembly being suspended during installation, U-bolts are usually used to install the bracket and meter assembly on nearby horizontal or vertical pipes. However, the angle and position of the U-bolts are usually constant, making it difficult to align the U-bolts with pipes at different angles and directions, resulting in poor flexibility. Summary of the Invention

[0006] To address the problems in the prior art, this invention provides an intelligent differential pressure flow meter.

[0007] The technical solution adopted by the present invention to solve its technical problem is: an intelligent differential pressure flow meter, including a diaphragm, a three-valve assembly installed on the diaphragm, a throttling structure connected to the three-valve assembly, and a sliding structure provided on the throttling structure;

[0008] The throttling structure includes a first mounting base and a second mounting base abutting against the first mounting base. The first mounting base is provided on the side of the diaphragm box. The sliding structure includes a mounting frame and an end cap engaged with the mounting frame. The mounting frame abuts between the first mounting base and the second mounting base. A perforated plate is engaged with the end cap. The perforated plate abuts against the inner wall of the mounting frame. Lugs are fixedly connected to both sides of the end cap. Sliding columns are fixedly connected to both the first and second mounting bases. A limiting post is slidably connected to one of the sliding columns. A third spring is fixedly connected between the limiting post and the inner wall of the sliding column. The end of the limiting post abuts against the lug. A knob is threadedly connected to one of the sliding columns. The knob abuts against the limiting post.

[0009] Specifically, the first mounting base and the second mounting base are fixedly connected by multiple fixing bolts, and a pressure tap is fixedly connected to both the first mounting base and the second mounting base. The end of the pressure tap is fixedly connected to the three-valve assembly.

[0010] Specifically, each of the two sliding columns is slidably connected to a sliding plate, and the two sliding plates are fixedly connected to the first mounting base and the second mounting base respectively by a second spring. The sliding plates are engaged with the adjacent lugs.

[0011] Specifically, the limiting post has an inclined surface at one end near the knob, and the end of the knob slides in conjunction with the inclined surface on the limiting post.

[0012] Specifically, both the first and second mounting bases are provided with a fixing structure, which includes a mounting block and a slide rod fixedly connected to the mounting block. Three mounting blocks are fixedly connected to both the first and second mounting bases. A clamping block is slidably connected to the slide rod. The clamping block is slidably connected to the mounting block. A first tension spring is fixedly connected to the clamping block and the mounting block. A limit rod is slidably connected to the clamping block. A second tension spring is fixedly connected to one end of the limit rod and the clamping block. The other end of the limit rod is slidably connected to the mounting block. Rubber pads are engaged on both the first and second mounting bases.

[0013] Specifically, the clamping block has an "L" shaped cross-section, and both the clamping block and the limiting rod have beveled surfaces at their inner ends. The second mounting base is connected to a docking structure.

[0014] Specifically, the docking structure includes a conveying pipe and a fixing ring fixedly connected to the end of the conveying pipe. The outer end of the second mounting base is connected to the conveying pipe. The fixing ring and the end of the second mounting base are engaged with each other. The conveying pipe and the fixing ring both abut against a rubber pad. Three inclined blocks are fixedly connected to the fixing ring. The inclined blocks have inclined surfaces and insertion holes.

[0015] Specifically, the inner end of the clamping block abuts against the fixing ring, the clamping block slides against the inclined surface on the adjacent inclined block, and the inclined block slides against the inclined surface at the end of the limiting rod.

[0016] Specifically, a meter head is fixedly connected to the top of the membrane box, and an installation structure is connected to the side of the membrane box.

[0017] Specifically, the installation structure includes a mounting frame and guide posts fixedly connected to both sides of the mounting frame. The mounting frame is fixedly connected to the side of the diaphragm box. A slide is slidably connected between the two guide posts. The slide is slidably connected to the mounting frame. Three limiting grooves are provided on one side of the slide. A limiting block is slidably connected to one of the guide posts near the limiting groove. One end of the limiting block is engaged with the limiting groove. A first spring is fixedly connected between the other end of the limiting block and the guide post. Two pairs of mounting holes are provided on the slide. A U-bolt is fixedly connected between one pair of mounting holes.

[0018] The beneficial effects of this invention are:

[0019] (1) The intelligent differential pressure flow meter of the present invention has an installation structure installed on the diaphragm box. The installation structure is designed to facilitate flexible adjustment of the angle and position of the installation component, and to facilitate alignment of the installation component with the nearby pipe, thereby supporting the diaphragm box and the meter head, avoiding the diaphragm box and the meter head from being suspended, and improving stability.

[0020] (2) The intelligent differential pressure flow meter of the present invention has a throttling structure connected to the diaphragm box, and a fixing structure is used in conjunction with the throttling structure. The fixing structure is used in conjunction with the docking structure to facilitate the quick docking of the throttling device with the conveying pipeline, and at the same time, it is easy to quickly remove the throttling device from the conveying pipeline, which is highly flexible.

[0021] (3) The intelligent differential pressure flow meter of the present invention has a sliding structure on the throttling structure. The sliding structure facilitates the quick replacement of orifice plates with different orifice diameters, avoiding the problem of disassembling the throttling element as a whole and repeatedly tightening the bolts when replacing it. It is easy to operate and highly practical. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Figure 1 This is a schematic diagram of the overall structure of a preferred embodiment of an intelligent differential pressure flow meter provided by the present invention.

[0024] Figure 2 for Figure 1 The diagram shows an enlarged view of part A.

[0025] Figure 3This is a schematic diagram of the connection structure between the mounting bracket and the carriage of the present invention.

[0026] Figure 4 This is a schematic diagram of the connection structure between the membrane capsule and the three-valve assembly of the present invention.

[0027] Figure 5 This is a schematic diagram of the connection structure between the second mounting base and the delivery pipe of the present invention.

[0028] Figure 6 for Figure 5 The diagram shows an enlarged view of section B.

[0029] Figure 7 This is a schematic diagram of the connection structure between the delivery pipe and the fixing ring of the present invention.

[0030] Figure 8 for Figure 7 The diagram shows an enlarged view of section C.

[0031] Figure 9 This is a schematic diagram of the connection structure between the second mounting base and the fixing ring of the present invention.

[0032] Figure 10 for Figure 9 The diagram shows an enlarged view of the structure of part D.

[0033] Figure 11 This is a schematic diagram of the connection structure between the mounting block and the clamping block of the present invention.

[0034] Figure 12 for Figure 11 The diagram shows an enlarged view of the E-section structure.

[0035] Figure 13 This is a schematic diagram of the connection structure between the first mounting base and the mounting frame of the present invention.

[0036] Figure 14 for Figure 13 The diagram shows an enlarged view of the F-section structure.

[0037] Figure 15 This is a schematic diagram of the connection structure between the end cap and the mounting frame of the present invention.

[0038] In the diagram: 1. Diaphragm box; 2. Meter head; 3. Mounting structure; 301. Mounting bracket; 302. Guide post; 303. Slide carriage; 304. Limiting groove; 305. Limiting block; 306. First spring; 307. Mounting hole; 308. U-bolt; 4. Three-valve manifold; 5. Throttling structure; 501. First mounting seat; 502. Second mounting seat; 503. Fixing bolt; 504. Pressure tap; 6. Sliding structure; 601. Mounting frame; 602. End cap; 60 3. Perforated plate; 604. Sliding column; 605. Slide plate; 606. Second spring; 607. Lug; 608. Limiting post; 609. Third spring; 610. Knob; 7. Fixing structure; 701. Mounting block; 702. Sliding rod; 703. Pressing block; 704. First tension spring; 705. Limiting rod; 706. Second tension spring; 707. Rubber pad; 8. Connecting structure; 801. Conveying pipe; 802. Fixing ring; 803. Inclined block; 804. Insertion hole. Detailed Implementation

[0039] 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.

[0040] like Figure 1 and Figures 5-15 As shown, the intelligent differential pressure flowmeter of the present invention includes a diaphragm box 1, a three-valve assembly 4 mounted on the diaphragm box 1, a throttling structure 5 connected to the three-valve assembly 4, and a sliding structure 6 provided on the throttling structure 5. Before installing the differential pressure flowmeter, the throttling element needs to be assembled first. The throttling structure 5 includes a first mounting seat 501 and a second mounting seat 502 abutting against the first mounting seat 501. The first mounting seat 501 and the second mounting seat 502 are fixedly connected by multiple fixing bolts 503. The first mounting seat 501 is provided on the side of the diaphragm box 1. A pressure tapping tube 504 is fixedly connected to both the first mounting seat 501 and the second mounting seat 502. The end of the pressure tapping tube 504 is fixedly connected to the three-valve assembly 4. The first mounting seat 501 and the second mounting seat 502 are fixed into a whole by multiple fixing bolts 503. At this time, the assembly of the throttling element is completed, and the throttling element is strong.

[0041] Specifically, such as Figure 7 , Figure 9 and Figures 11-15As shown, if the actual measured flow rate of the fluid in the delivery pipe 801 changes significantly and a different orifice plate 603 needs to be replaced, the sliding structure 6 includes a mounting frame 601 and an end cap 602 engaged with the mounting frame 601. The mounting frame 601 abuts against the first mounting seat 501 and the second mounting seat 502. The orifice plate 603 is engaged with the end cap 602, and the orifice plate 603 abuts against the inner wall of the mounting frame 601. Lugs 607 are fixedly connected to both sides of the end cap 602. Sliding columns 604 are fixedly connected to both the first mounting seat 501 and the second mounting seat 502. A limiting column 608 is slidably connected to one of the sliding columns 604. The limiting column 608 and the sliding column 604 are connected to each other. A third spring 609 is fixedly connected between the inner walls of 04. The end of the limiting post 608 abuts against the lug 607. A knob 610 is threadedly connected to one of the sliding posts 604, and the knob 610 abuts against the limiting post 608. Slide plates 605 are slidably connected to both sliding posts 604. The two slide plates 605 are fixedly connected to the first mounting base 501 and the second mounting base 502 respectively by a second spring 606. The slide plates 605 and the adjacent lugs 607 are engaged with each other. A bevel is provided on the end of the limiting post 608 near the knob 610. The end of the knob 610 slides against the bevel provided on the limiting post 608. The hole plate 603 can be pulled out from inside the mounting frame 601. Simply replace the perforated plate 603 with a new one. Use a hex wrench to turn the knob 610 on the slide post 604, moving the knob 610 outward. During this process, the end of the knob 610 slowly disengages from the limiting post 608. Simultaneously, the limiting post 608 retracts inward into the slide post 604 under the force of the third spring 609, until the outer end of the limiting post 608 no longer touches the lug 607 on the end cap 602. At this point, the slide plate 605, under the reset force of the second spring 606, pushes the lug 607 and the end cap 602 outward a certain distance. The end cap 602 then pushes the perforated plate 603 outward, making it easier for the operator to grasp. Then, simply remove the end cap 602 and the perforated plate 603 from... Simply pull out the mounting frame 601, then remove the original perforated plate 603 from the end cap 602 and reattach the perforated plate 603 with the other diameter to the end cap 602. Then insert the end cap 602 and the perforated plate 603 into the mounting frame 601. Finally, press the end cap 602 firmly with one hand and turn the knob 610 in the opposite direction with the other hand. The inner end of the knob 610 slides against the inclined surface on the limiting post 608, causing the limiting post 608 to extend towards the ear 607 until the limiting post 608 is pressed against the ear 607. At this point, the replacement and installation of the different perforated plates 603 are completed. The frame is very secure, and the inner and outer surfaces of the mounting frame 601 are made of rubber, ensuring overall sealing.

[0042] Specifically, such as Figure 1 , Figures 5-6 , Figure 8 , Figure 10 , Figure 11 and Figure 13 As shown, the throttling device needs to be installed between the two delivery pipes 801. First, the second mounting base 502 needs to be connected to the adjacent delivery pipe 801. Both the first mounting base 501 and the second mounting base 502 are equipped with a fixing structure 7. The fixing structure 7 includes a mounting block 701 and a sliding rod 702 fixedly connected to the mounting block 701. Three mounting blocks 701 are fixedly connected to both the first mounting base 501 and the second mounting base 502. A clamping block 703 is slidably connected to the sliding rod 702. The clamping block 703 has an "L"-shaped cross-section and is slidably connected to the mounting block 701. A first tension spring 704 is fixedly connected. Simply align the second mounting base 502 with the opening of the conveying pipe 801, ensuring their center lines are aligned. Then, press the second mounting base 502 towards the conveying pipe 801. At this point, the retaining ring 802 at the opening of the conveying pipe 801 abuts against the inclined surface of the clamping block 703, simultaneously causing the three clamping blocks 703 to slide outward along the slide rod 702, stretching the first tension spring 704 between it and the mounting block 701. Continue pressing the second mounting base 502 until the conveying pipe 801 and the retaining ring 802 are both engaged on the second mounting base 502. The first tension spring 704 drives the clamping block 703 and the limiting rod 705 to reset. Then, the same operation is repeated between the first mounting base 501 on the other side and the adjacent conveying pipe 801. At this time, the connection between the conveying pipe 801 and the throttling device is initially completed. The operation is simple. The limiting rod 705 is slidably connected on the clamping block 703. One end of the limiting rod 705 is fixedly connected to the clamping block 703 with a second tension spring 706. The other end of the limiting rod 705 is slidably connected to the mounting block 701. Rubber pads 707 are engaged on both the first mounting base 501 and the second mounting base 502. The setting of the rubber pads 707 ensures that the conveying pipe 801 can be compressed inward by a certain distance. While ensuring a tight seal, both the clamping block 703 and the limiting rod 705 have inclined surfaces on their inner ends. The second mounting base 502 is connected to the docking structure 8. When the throttling device is rotated counterclockwise, the first mounting base 501 and the second mounting base 502 simultaneously drive the clamping block 703 to rotate counterclockwise. The clamping block 703 facilitates the sliding fit between the inclined surfaces on the inclined block 803, thereby gradually pressing the inclined block 803. The inclined block 803 drives the fixing ring 802 and the conveying pipe 801 to press the rubber pad 707 on the inner side of the first mounting base 501 and the second mounting base 502, thereby achieving further fixation between the conveying pipe 801 and the throttling device.

[0043] Specifically, such as Figure 1 and Figures 5-10As shown, the docking structure 8 includes a conveying pipe 801 and a fixing ring 802 fixedly connected to the end of the conveying pipe 801. The outer end of the second mounting base 502 is connected to the conveying pipe 801. The fixing ring 802 and the end of the second mounting base 502 are engaged with each other. Both the conveying pipe 801 and the fixing ring 802 abut against the rubber pad 707. Three inclined blocks 803 are fixedly connected to the fixing ring 802. During the counterclockwise rotation of the throttling device, the inclined surface of the inner end of the limiting rod 705 abuts against the inclined blocks 803, thereby causing the limiting rod 705 to slide outward. When the pressing block 703 rotates to the designated position on the inclined block 803... At this time, the inclined block 803 has an inclined surface and an insertion hole 804. The inner end of the pressing block 703 abuts against the fixing ring 802. The pressing block 703 and the inclined surface on the adjacent inclined block 803 are in sliding fit. The inclined block 803 and the inclined surface at the end of the limiting rod 705 are in sliding fit. At this time, the limiting rod 705 is aligned with the insertion hole 804 on the inclined block 803. Then, under the reset action of the second tension spring 706, the limiting rod 705 engages with the insertion hole 804. The setting of the limiting rod 705 prevents the throttling element from rotating arbitrarily under the action of external force, so that the throttling element and the conveying pipe 801 are more firmly fixed.

[0044] Specifically, such as Figure 2 and Figure 3As shown, a meter 2 is fixedly connected to the top of the diaphragm box 1. Then, the meter 2 and the three-valve assembly 4 are respectively installed on the diaphragm box 1. A mounting structure 3 is connected to the side of the diaphragm box 1. The mounting structure 3 includes a mounting bracket 301 and guide posts 302 fixedly connected to both sides of the mounting bracket 301. The mounting bracket 301 is fixedly connected to the side of the diaphragm box 1. A slide 303 is slidably connected between the two guide posts 302. The slide 303 is slidably connected to the mounting bracket 301. A section is opened on one side of the slide 303. Three limiting grooves 304 are provided. A limiting block 305 is slidably connected to a guide post 302 near one of the limiting grooves 304. One end of the limiting block 305 is engaged with the limiting groove 304, and a first spring 306 is fixedly connected between the other end of the limiting block 305 and the guide post 302. Two pairs of mounting holes 307 are provided on the slide 303. A U-bolt 308 is fixedly connected between one pair of mounting holes 307 to fix the diaphragm box 1 to a nearby pipe using the U-bolt 308, thus preventing... The meter head 2 and diaphragm box 1 are suspended to improve stability. The mounting bracket 301 is fixed to the diaphragm box 1. During the process of fixing the U-bolt 308 to the nearby pipe, the U-bolt 308 can be adjusted to a suitable angle and position. Simply pull the limiting block 305 outward to make it slide out of the limiting groove 304, and then pull the slide 303 downward until the slide 303 and U-bolt 308 are pulled down to a suitable length. Then the angle can be adjusted. The groove 304 has a hexagonal structure. The slide 303 rotates around the two guide posts 302 by a specified angle. Then, the limiting block 305 is released. Under the action of the first spring 306, the limiting block 305 engages with the corresponding limiting groove 304. At this time, the position and angle of the slide 303 and the U-bolt 308 can be adjusted, which is convenient for connecting with the pipe of the accessory. In addition, the slide 303 has two sets of mounting holes 307, which are convenient for adjusting the position of the U-bolt 308, making it flexible and strong.

[0045] When using this invention, before installing the differential pressure flow meter, the throttling element needs to be assembled first. Simply place the mounting frame 601 with the orifice plate 603 engaged between the first mounting base 501 and the second mounting base 502, so that the first mounting base 501 and the second mounting base 502 cooperate to clamp the mounting frame 601. Then, use multiple fixing bolts 503 to fix the first mounting base 501 and the second mounting base 502 into a whole. At this time, the assembly of the throttling element is completed, and the throttling element is very strong.

[0046] Next, the throttling device needs to be installed between the two delivery pipes 801. First, the second mounting base 502 needs to be aligned with the adjacent delivery pipe 801. Simply align the second mounting base 502 with the opening of the delivery pipe 801, making their center lines mutually aligned. Then, press the second mounting base 502 towards the delivery pipe 801. At this time, the fixing ring 802 at the opening of the delivery pipe 801 abuts against the inclined surface on the clamping block 703, simultaneously driving the three clamping blocks 703 to slide outward along the slide rod 702, and stretching the first tension spring 7 between the mounting block 701 and the first tension spring 7. 04. Continue pressing the second mounting base 502 until the three clamping blocks 703 no longer obstruct the movement of the conveying pipe 801, until the conveying pipe 801 and the fixing ring 802 are engaged on the second mounting base 502. Then, the first tension spring 704 drives the clamping blocks 703 and the limiting rod 705 to reset. Then, repeat the same operation between the first mounting base 501 on the other side and the adjacent conveying pipe 801. At this point, the connection between the conveying pipe 801 and the throttling device is initially completed. The operation is simple. Next, it needs to be further fixed. Simply rotate the throttling device counterclockwise. At this time, the first mounting base 501 and the second mounting base 502 simultaneously drive the clamping block 703 to rotate counterclockwise. The clamping block 703 facilitates the sliding fit between the inclined surfaces on the inclined block 803, thereby gradually clamping the inclined block 803. The inclined block 803, in turn, drives the fixing ring 802 and the conveying pipe 801 to press the rubber pad 707 on the inner side of the first mounting base 501 and the second mounting base 502, thereby further fixing the conveying pipe 801 to the throttling device. The rubber pad 707 ensures that the conveying pipe 801 can be compressed inward by a certain distance, while ensuring a tight seal. The limiting rod 705 is sealed, and during the counterclockwise rotation of the throttling device, the inclined surface of the inner end of the limiting rod 705 will abut against the inclined block 803, thereby causing the limiting rod 705 to slide outward. When the pressing block 703 rotates to the designated position on the inclined block 803, the limiting rod 705 is aligned with the insertion hole 804 opened on the inclined block 803. Then, under the reset action of the second tension spring 706, the limiting rod 705 engages with the insertion hole 804. The setting of the limiting rod 705 prevents the throttling device from rotating arbitrarily under the action of external force, making the throttling device and the conveying pipe 801 more firmly fixed.

[0047] Then, install the meter 2 and the three-valve assembly 4 onto the diaphragm box 1 respectively. Next, fix the pressure taps 504 on the first mounting base 501 and the second mounting base 502 to the interfaces of the three-valve assembly 4. Then, fix the diaphragm box 1 to the nearby pipe with U-bolts 308 to prevent the meter 2 and the diaphragm box 1 from being suspended and to improve stability. Fix the mounting bracket 301 onto the diaphragm box 1. During the process of fixing the U-bolts 308 to the nearby pipe, the U-bolts 308 can be adjusted to a suitable angle and position. Simply pull the limiting block 305 outward to make the limiting block 305 slide out of the limiting groove 304, and then pull the slide down. 303, until the slide 303 and U-bolt 308 are pulled down to the appropriate length, then the angle can be adjusted. Since the limiting groove 304 is a hexagonal structure, the slide 303 rotates around the two guide posts 302 at a specified angle. Then, release the limiting block 305. Under the action of the first spring 306, the limiting block 305 engages with the corresponding limiting groove 304. At this time, the position and angle of the slide 303 and U-bolt 308 are adjusted, which is convenient for connecting with the pipe of the accessory. In addition, the slide 303 has two sets of mounting holes 307, which are convenient for adjusting the position of the U-bolt 308, making it flexible and strong.

[0048] If the actual measured flow rate of the fluid in the delivery pipe 801 changes significantly and a different orifice plate 603 needs to be replaced, simply pull the orifice plate 603 out of the mounting frame 601 and replace it with a new one. Use a hex wrench to turn the knob 610 on the slide post 604, moving the knob 610 outward. During this process, the end of the knob 610 slowly disengages from the limiting post 608. Simultaneously, the limiting post 608 retracts into the slide post 604 under the force of the third spring 609 until the outer end of the limiting post 608 no longer touches the lug 607 on the end cap 602. At this point, the slide plate 605, under the reset force of the second spring 606, pushes the lug 607 and the end cap 602 outward a certain distance. The end cap 602 then pushes the orifice plate 603 outward. The plate pops out for easy handling by the operator. Then, simply pull the end cap 602 and the perforated plate 603 out of the mounting frame 601. Next, remove the original perforated plate 603 from the end cap 602 and re-attach the perforated plate 603 with the other diameter to the end cap 602. Then, insert the end cap 602 and the perforated plate 603 into the mounting frame 601. Finally, press the end cap 602 firmly with one hand and turn the knob 610 in the opposite direction with the other hand. The inner end of the knob 610 slides against the inclined surface on the limiting post 608, causing the limiting post 608 to extend towards the ear 607 until the limiting post 608 is pressed against the ear 607. At this point, the replacement and installation of different perforated plates 603 are completed. The system is very secure, and the inner and outer surfaces of the mounting frame 601 are made of rubber, ensuring overall sealing.

[0049] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0050] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An intelligent differential pressure flow meter, characterized in that, It includes a membrane box (1), a three-valve assembly (4) installed on the membrane box (1), a throttling structure (5) connected to the three-valve assembly (4), and a sliding structure (6) provided on the throttling structure (5). The throttling structure (5) includes a first mounting base (501) and a second mounting base (502) abutting against the first mounting base (501). The first mounting base (501) is provided on the side of the diaphragm box (1). The sliding structure (6) includes a mounting frame (601) and an end cap (602) engaged with the mounting frame (601). The mounting frame (601) abuts between the first mounting base (501) and the second mounting base (502). A perforated plate (603) is engaged with the end cap (602). The perforated plate (603) abuts against the inner wall of the mounting frame (601). Both sides of the end cap (602) are fixedly connected with lugs (607). The first mounting base (501) and the second mounting base (502) are fixedly connected with sliding pillars (604). A limiting post (608) is slidably connected to one of the sliding pillars (604). A third spring (609) is fixedly connected between the limiting post (608) and the inner wall of the sliding pillar (604). The end of the limiting post (608) abuts against the lugs (607). A knob (610) is threadedly connected to one of the sliding pillars (604). The knob (610) abuts against the limiting post (608). Each of the two sliding columns (604) is slidably connected to a sliding plate (605). The two sliding plates (605) are respectively fixedly connected to the first mounting base (501) and the second mounting base (502) by a second spring (606). The sliding plate (605) is engaged with the adjacent lug (607). Both the first mounting base (501) and the second mounting base (502) are provided with a fixing structure (7). The fixing structure (7) includes a mounting block (701) and a slide rod (702) fixedly connected to the mounting block (701). Three mounting blocks (701) are fixedly connected to both the first mounting base (501) and the second mounting base (502). A pressing block (703) is slidably connected to the slide rod (702). The pressing block (703) is slidably connected to the mounting block (701). A first tension spring (704) is fixedly connected between the pressing block (703) and the mounting block (701). A limiting rod (705) is slidably connected to the clamping block (703). One end of the limiting rod (705) is fixedly connected to the clamping block (703) with a second tension spring (706). The other end of the limiting rod (705) is slidably connected to the mounting block (701). Rubber pads (707) are engaged on both the first mounting seat (501) and the second mounting seat (502). The clamping block (703) has an "L" shaped cross section. An inclined surface is provided on the inner side of both the clamping block (703) and the limiting rod (705). A docking structure (8) is connected to the second mounting seat (502).

2. The intelligent differential pressure flow meter according to claim 1, characterized in that: The first mounting base (501) and the second mounting base (502) are fixedly connected by multiple fixing bolts (503). A pressure tap (504) is fixedly connected to both the first mounting base (501) and the second mounting base (502). The end of the pressure tap (504) is fixedly connected to the three-valve group (4).

3. The intelligent differential pressure flow meter according to claim 1, characterized in that: The limiting post (608) has an inclined surface at one end near the knob (610), and the end of the knob (610) slides in contact with the inclined surface on the limiting post (608).

4. The intelligent differential pressure flow meter according to claim 1, characterized in that: The docking structure (8) includes a conveying pipe (801) and a fixing ring (802) fixedly connected to the end of the conveying pipe (801). The outer end of the second mounting base (502) is connected to the conveying pipe (801). The fixing ring (802) and the end of the second mounting base (502) are engaged with each other. The conveying pipe (801) and the fixing ring (802) both abut against the rubber pad (707). Three inclined blocks (803) are fixedly connected to the fixing ring (802). An inclined surface is provided on the inclined block (803). An insertion hole (804) is provided on the inclined block (803).

5. The intelligent differential pressure flow meter according to claim 1, characterized in that: The inner end of the clamping block (703) abuts against the fixing ring (802), the clamping block (703) slides with the inclined surface on the adjacent inclined block (803), and the inclined block (803) slides with the inclined surface at the end of the limiting rod (705).

6. The intelligent differential pressure flow meter according to claim 1, characterized in that: The top of the diaphragm box (1) is fixedly connected to the meter head (2), and the side of the diaphragm box (1) is connected to the mounting structure (3).

7. The intelligent differential pressure flow meter according to claim 6, characterized in that: The mounting structure (3) includes a mounting frame (301) and guide posts (302) fixedly connected to both sides of the mounting frame (301). The mounting frame (301) is fixedly connected to the side of the diaphragm box (1). A slide (303) is slidably connected between the two guide posts (302). The slide (303) is slidably connected to the mounting frame (301). Three limiting grooves (304) are provided on one side of the slide (303). A limiting block (305) is slidably connected on one of the guide posts (302) near the limiting groove (304). One end of the limiting block (305) is engaged with the limiting groove (304). A first spring (306) is fixedly connected between the other end of the limiting block (305) and the guide post (302). Two pairs of mounting holes (307) are provided on the slide (303). A U-bolt (308) is fixedly connected between one pair of mounting holes (307).

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