An integrated differential pressure orifice flowmeter

Abstract

The present invention relates to the field of flow measurement technology, specifically an integrated differential pressure orifice flowmeter, including a differential pressure transmitter, a filtering structure, a driving structure, a mounting structure, a fixing structure, a disassembly structure, a three-valve group, a pressure guide tube and a mounting pipe; the setting of the filtering structure facilitates intercepting and filtering the medium in the fluid channel, can prevent impurities from entering the subsequent detection components to affect the detection effect, and prevent them from interfering with the flow detection; the driving structure facilitates driving the guide block to drive the filter to move back and forth, constantly changing the relative position of the filter and impurities, so that particulate impurities are not easy to adhere to the surface of the filter, thereby reducing the risk of blockage and ensuring that the fluid can filter the filter smoothly; the plug-in installation in the mounting structure can quickly complete the replacement of the orifice plate without disassembling multiple components, thereby improving the replacement efficiency; the second screw drive connecting ring in the fixed structure simultaneously drives multiple blocks to press against the pipeline flange, thereby improving the installation efficiency of the flowmeter mounting pipe.

Description

Technical Field

[0001] The invention relates to the technical field of flow measurement, in particular to an integrated differential pressure orifice flowmeter. Background Art

[0002] In the field of flow measurement in industrial production and scientific research experiments, the integrated differential pressure orifice flowmeter is an important device that realizes accurate flow measurement based on the throttling principle. Its core component is the orifice plate. When the fluid flows through the orifice plate, the flow area suddenly shrinks and the flow velocity accelerates. According to the Bernoulli equation, a pressure difference will be generated before and after the orifice plate. By accurately measuring this pressure difference and combining the physical properties of the fluid (such as density, viscosity, etc.) and pipeline parameters (such as pipe diameter, orifice plate aperture, etc.), the flow rate of the fluid can be obtained using a specific flow calculation formula. This type of flowmeter is widely used in the petrochemical industry for flow monitoring of crude oil, refined oil and chemical raw materials, steam and cooling water flow measurement in the power industry, and flow detection of various gas and liquid media in the metallurgical industry due to its relatively simple structure, low cost and strong adaptability.

[0003] However, when the production process is adjusted so that the flow measurement range and accuracy requirements change, and the orifice plate needs to be replaced to adapt to the new flow range, since the orifice plate is assembled between the flanges of the two mounting pipes and a pressure guide tube is installed on the flange, the pressure guide tube and three sets of valves need to be removed first, and then the two mounting pipes need to be removed before the orifice plate can be replaced. The multi-component disassembly process leads to low replacement efficiency; and the impurities contained in the transported fluid will not only wear the orifice plate, but may also enter the pressure port of the pressure sensing element, causing the pressure taking line to be blocked, making it inconvenient for the pressure sensing element to accurately obtain the true pressure before and after the orifice plate, and thus it is inconvenient to correctly calculate the pressure difference, affecting the detection effect; in addition, after the flowmeter is assembled, the flange of the flowmeter mounting pipe is generally connected to the on-site pipeline flange by bolts and nuts. During the installation process, the mounting pipe flanges at the inlet and outlet need to be tightened with bolts in turn, which is cumbersome to operate and results in low overall installation efficiency. Summary of the Invention

[0004] In view of the problems in the prior art, the present invention provides an integrated differential pressure orifice flowmeter.

[0005] The technical solution adopted by the present invention to solve its technical problem is: an integrated differential pressure orifice flowmeter, including a differential pressure transmitter, a three-valve group installed on the differential pressure transmitter, two pressure-guiding pipes installed on the three-valve group, two mounting pipes installed on the two pressure-guiding pipes, a filter structure installed on one of the mounting pipes, a mounting structure installed between the two mounting pipes, and a fixing structure installed on the mounting pipes;

[0006] The filtering structure includes a mounting frame detachably connected to the mounting tube and a sliding frame slidably connected to the mounting frame, a filter screen is mounted on the sliding frame, a guide block is fixedly connected to the sliding frame, the guide block is slidably connected to the mounting tube, a collecting trough is provided on the mounting frame, and the guide block is driven by a driving structure;

[0007] The driving structure includes a rotating shaft rotatably connected to the guide block and a connecting ball fixedly connected to the rotating shaft. The mounting frame is rotatably connected to a connecting shaft, and two driving disks are fixedly connected to the connecting shaft. The connecting ball and the driving disk are in rolling cooperation.

[0008] Specifically, the installation frame is provided with a guide rail, the guide block is slidably connected to the guide rail, the sliding frame is fixedly connected to two guide rings, the guide rings are slidably connected to the installation frame, a driving member is installed in the installation frame, and the connecting shaft is driven by the driving member.

[0009] Specifically, the mounting structure includes a connecting frame installed between the two mounting tubes and a connecting plate detachably connected to the connecting frame, a perforated plate is provided on the connecting plate, two fixed plates are fixedly connected to the connecting frame, a limiting plate is slidably connected to the fixed plate, the limiting plate is slidably connected to the connecting plate, a first screw rod is rotatably connected between the two fixed plates, the limiting plate is threadedly connected to the first screw rod, and the thread directions at both ends of the first screw rod are opposite.

[0010] Specifically, a driving block is fixedly connected to the connecting plate, the cross section of the driving block is a triangular structure, and the inclined portion of the limiting plate is in sliding cooperation with the driving block.

[0011] Specifically, a positioning sleeve is fixedly connected to the connection frame, a positioning rod is fixedly connected to the connection plate, and the positioning rod is plugged into the positioning sleeve.

[0012] Specifically, a guide rod is fixedly connected between the two fixing plates, and the limiting plate is slidably connected to the guide rod.

[0013] Specifically, the fixing structure includes an adjusting ring slidably connected to the mounting tube and a connecting ring slidably connected to the adjusting ring, a plurality of fixing columns are fixedly connected to the connecting ring, the fixing columns are slidably connected to the mounting tube, a stop block is slidably connected to the fixing columns, a second screw rod is rotatably connected to the adjusting ring, and the connecting ring is threadedly connected to the second screw rod.

[0014] Specifically, a sliding rod is fixedly connected to the stop block, a guide column is fixedly connected inside the fixed column, the sliding rod is slidably connected to the guide column, a driving shaft is rotatably connected to the sliding rod, and a first spring is fixedly connected between the sliding rod and the fixed column.

[0015] Specifically, the drive shaft is used in conjunction with a disassembly structure, and the disassembly structure includes a drive ring rotatably connected to the connecting ring and a plurality of inclined surfaces provided on the drive ring. The drive shaft and the drive ring are in rolling cooperation. A connecting column is fixedly connected to the drive ring, and a slip ring is slidably provided on the connecting column. A limiting column is fixedly connected to the slip ring, and two limiting holes are provided on the adjustment ring, and the limiting column is engaged with one of the limiting holes.

[0016] Specifically, a pull rod is fixedly connected to the slip ring, and a second spring is fixedly connected between the slip ring and the connecting column.

[0017] The beneficial effects of the present invention are:

[0018] (1) The present invention relates to an integrated differential pressure orifice flowmeter, wherein a filter structure is provided on one of the mounting tubes, and a guide block is driven by a drive structure. The filter structure is provided to intercept and filter the medium in the fluid channel, thereby preventing impurities from entering the subsequent detection components and affecting the detection effect, thereby preventing them from interfering with the flow detection. The drive structure facilitates driving the guide block to drive the filter to move back and forth, continuously changing the relative position of the filter and the impurities, making it difficult for particulate impurities to adhere to the surface of the filter, thereby reducing the risk of blockage, ensuring that the fluid passes through the filter smoothly, and maintaining the stable operation of the flowmeter.

[0019] (2) The integrated differential pressure orifice flowmeter described in the present invention has a mounting structure provided between two mounting pipes. During assembly and disassembly, the orifice plate can be quickly replaced by means of a plug-in installation in the mounting structure without disassembling multiple components, thereby improving replacement efficiency and enabling the orifice plate to be stably installed between the two mounting pipes, thereby enhancing stability.

[0020] (3) The integrated differential pressure orifice flowmeter described in the present invention has a fixed structure on the mounting pipe, and the drive shaft is used in conjunction with the disassembly structure. The second screw drive connecting ring in the fixed structure simultaneously drives multiple blocks to press against the pipeline flange, thereby improving the installation efficiency of the flowmeter mounting pipe. The disassembly structure drives multiple blocks to contract simultaneously through a drive ring, thereby enhancing the disassembly flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below with reference to the accompanying drawings and examples.

[0022] Figure 1 A schematic diagram of the overall structure of a preferred embodiment of an integrated differential pressure orifice flowmeter provided by the present invention;

[0023] Figure 2 for Figure 1 An enlarged schematic diagram of the structure of section A is shown;

[0024] Figure 3 for Figure 1An enlarged schematic diagram of the structure of part B is shown;

[0025] Figure 4 Schematic diagram of the connection structure between the three-valve group and the differential pressure transmitter of the present invention;

[0026] Figure 5 for Figure 4 The enlarged schematic diagram of the C-section structure is shown;

[0027] Figure 6 for Figure 4 An enlarged schematic diagram of the D portion structure is shown;

[0028] Figure 7 for Figure 4 An enlarged schematic diagram of the E-section structure is shown;

[0029] Figure 8 This is a schematic diagram of the connection structure between the adjustment ring and the mounting tube of the present invention;

[0030] Figure 9 for Figure 8 The enlarged schematic diagram of the F part structure is shown;

[0031] Figure 10 This is a schematic diagram of the connection structure between the connection frame and the mounting pipe of the present invention;

[0032] Figure 11 for Figure 10 The enlarged schematic diagram of the G-section structure is shown;

[0033] Figure 12 Schematic diagram of the connection structure between the connecting ring and the adjusting ring of the present invention;

[0034] Figure 13 for Figure 12 The enlarged schematic diagram of the H part structure is shown.

[0035] Figure: 1, differential pressure transmitter; 2, filter structure; 201, mounting frame; 202, slide frame; 203, filter screen; 204, guide block; 205, guide rail; 206, guide ring; 207, collecting tank; 3, drive structure; 301, rotating shaft; 302, connecting ball; 303, connecting shaft; 304, drive disc; 305, driving member; 4, mounting structure; 401, connecting frame; 402, connecting plate; 403, orifice plate; 404, fixing plate; 405, limit plate; 406, first screw rod; 407, guide rod; 408, fixed rod Position sleeve; 409, positioning rod; 410, driving block; 5, fixing structure; 501, adjusting ring; 502, connecting ring; 503, fixing column; 504, stop block; 505, sliding rod; 506, guide column; 507, first spring; 508, driving shaft; 509, second screw rod; 6, disassembly structure; 601, driving ring; 602, inclined plane; 603, connecting column; 604, sliding ring; 605, limiting column; 606, limiting hole; 607, second spring; 608, pull rod; 7, three-valve group; 8, pressure guide tube; 9, mounting tube. DETAILED DESCRIPTION

[0036] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0037] like Figure 1 、 Figure 4 、 Figure 6 、 Figure 7 and Figure 13 As shown, the integrated differential pressure orifice flowmeter described in the present invention includes a differential pressure transmitter 1, a three-valve group 7 installed on the differential pressure transmitter 1, two pressure-guiding pipes 8 installed on the three-valve group 7, two mounting pipes 9 installed on the two pressure-guiding pipes 8, a filter structure 2 installed on one of the mounting pipes 9, a mounting structure 4 installed between the two mounting pipes 9, and a fixing structure 5 installed on the mounting pipe 9; the filter structure 2 includes a mounting frame 201 detachably connected to the mounting pipe 9 and a sliding frame 202 slidably connected to the mounting frame 201, the sliding frame A filter screen 203 is installed on 202, and a guide block 204 is fixedly connected to the sliding frame 202. The guide block 204 is slidingly connected to the mounting tube 9. A collecting groove 207 is provided on the mounting frame 201, and the guide block 204 is driven by a driving structure 3; the driving structure 3 includes a rotating shaft 301 rotatably connected to the guide block 204 and a connecting ball 302 fixedly connected to the rotating shaft 301, a connecting shaft 303 is rotatably connected to the mounting frame 201, and two driving disks 304 are fixedly connected to the connecting shaft 303, and the connecting ball 302 and the driving disk 304 are rollingly matched.

[0038] Specifically, such as Figure 4 and Figure 7 As shown, the installation frame 201 is provided with a guide rail 205, the guide block 204 is slidably connected to the guide rail 205, and two guide rings 206 are fixedly connected to the slide frame 202, and the guide rings 206 are slidably connected to the installation frame 201. The setting of the guide rings 206 allows the slide frame 202 to move more smoothly. A driving member 305 is installed in the installation frame 201, and the connecting shaft 303 is driven by the driving member 305.

[0039] Specifically, such as Figure 1 、 Figure 3 、 Figure 10 and Figure 11 As shown, the mounting structure 4 includes a connecting frame 401 installed between the two mounting tubes 9 and a connecting plate 402 detachably connected to the connecting frame 401, a perforated plate 403 is provided on the connecting plate 402, two fixed plates 404 are fixedly connected to the connecting frame 401, a limiting plate 405 is slidably connected to the fixed plate 404, the limiting plate 405 is slidably connected to the connecting plate 402, a first screw rod 406 is rotatably connected between the two fixed plates 404, the limiting plate 405 is threadedly connected to the first screw rod 406, the threads at both ends of the first screw rod 406 are in opposite directions, and the connecting plate 402 is fixedly connected to the fixing plate 401. It is connected to a driving block 410, and the cross-section of the driving block 410 is a triangular structure. The inclined part of the limit plate 405 slides with the driving block 410. The connecting frame 401 is fixedly connected with a positioning sleeve 408, and the connecting plate 402 is fixedly connected with a positioning rod 409. The positioning rod 409 is plugged into the positioning sleeve 408. By plugging the positioning rod 409 into the positioning sleeve 408, the orifice plate 403 can be prevented from being installed in the reverse direction and affecting the detection. A guide rod 407 is fixedly connected between the two fixed plates 404, and the limit plate 405 is slidably connected to the guide rod 407. The setting of the guide rod 407 allows the limit plate 405 to slide more smoothly.

[0040] Specifically, such as Figure 1 、 Figure 2 、 Figure 5 、 Figure 6 、 Figure 8 、 Figure 9 、 Figure 12 and Figure 13As shown, the fixing structure 5 includes an adjusting ring 501 slidably connected to the mounting tube 9 and a connecting ring 502 slidably connected to the adjusting ring 501, a plurality of fixing columns 503 are fixedly connected to the connecting ring 502, the fixing columns 503 are slidably connected to the mounting tube 9, a stop block 504 is slidably connected to the fixing columns 503, a second screw rod 509 is rotatably connected to the adjusting ring 501, the connecting ring 502 is threadedly connected to the second screw rod 509, and the second screw rod is connected to the fixing ring 502. The 509 driving connecting ring 502 simultaneously drives multiple blocks 504 to press against the pipeline flange, thereby improving the installation efficiency of the flow meter mounting pipe 9. The block 504 is fixedly connected with a slide rod 505, and a guide column 506 is fixedly connected to the fixed column 503. The slide rod 505 is slidably connected to the guide column 506. The slide rod 505 is rotatably connected to the drive shaft 508. A first spring 507 is fixedly connected between the slide rod 505 and the fixed column 503. The drive shaft 508 is equipped with a spring. The disassembly structure 6 includes a drive ring 601 rotatably connected to the connecting ring 502 and a plurality of inclined surfaces 602 provided on the drive ring 601. The drive shaft 508 and the drive ring 601 are in rolling cooperation. A connecting column 603 is fixedly connected to the drive ring 601. A slip ring 604 slides on the connecting column 603. A limiting column 605 is fixedly connected to the slip ring 604. Two limiting holes 606 are provided on the adjusting ring 501. The limiting column 605 is fixedly connected to the adjusting ring 501. 605 is engaged with one of the limiting holes 606, and the limiting column 605 is engaged with the adjusting ring 501, so as to fix the driving ring 601 after rotation to prevent it from rotating accidentally, and there is no need to keep turning the connecting column 603 during disassembly, thereby improving operational flexibility. At the same time, a plurality of blocks 504 are driven to contract simultaneously by a driving ring 601, thereby enhancing flexibility. A pull rod 608 is fixedly connected to the slip ring 604, and a second spring 607 is fixedly connected between the slip ring 604 and the connecting column 603.

[0041] When the present invention is in use, first, impurities in the fluid will be intercepted by the filter screen 203 and fall into the collection tank 207 of the installation frame 201. The filter screen 203 intercepts and filters the medium in the fluid channel, which can prevent impurities from entering the subsequent detection components to affect the detection effect and prevent them from interfering with the flow detection. At the same time, the driving member 305 (preferably a motor) is started, and the motor output shaft rotates to drive the connecting shaft 303 to rotate. The two inclined driving disks 304 on the connecting shaft 303 rotate synchronously. During the rotation of the driving disk 304, it rolls with the connecting ball 302. The connecting ball 302 transmits power to the guide block 204 through the rotating shaft 301, causing the guide block 204 to move along the guide rail 205. During the repeated sliding, the guide block 204 will drive the sliding frame 202 to move on the installation frame 201. When the sliding frame 202 moves, it drives the guide ring 206 to move. The setting of the guide ring 206 makes the sliding frame 202 move more smoothly. At the same time, the filter screen 203 moves back and forth accordingly. This movement can prevent the impurity particles on the surface of the filter screen 203 from adhering and accumulating. By constantly changing the relative position of the filter screen 203 and the impurities, it is difficult for the particles to adhere to the surface of the filter screen 203, thereby reducing the risk of clogging, ensuring that the fluid can flow smoothly through the filter screen 203 and maintaining the stable operation of the flow meter. During use, the installation frame 201 can be disassembled regularly to clean the impurities in the collection tank 207 to ensure the permeability of the filter screen 203.

[0042] When the orifice plate 403 needs to be replaced, insert the hexagonal wrench into the hexagonal groove of the first screw rod 406 and rotate the first screw rod 406. Since the threads at both ends of the first screw rod 406 are in opposite directions, the two limit plates 405 will move back to back along the guide rod 407. The setting of the guide rod 407 allows the limit plates 405 to slide more smoothly. As the limit plates 405 move, they no longer resist the connecting plate 402. At this time, press the positioning rod 409 to make the positioning rod 409 and the positioning sleeve 408 slide down, and at the same time pull out the orifice plate 403 to complete the disassembly. During installation, the positioning rod 409 and the positioning sleeve 408 are used to fix the orifice plate 403. The plug-in connection can avoid the orifice plate 403 being installed in the forward and reverse directions and affecting the detection. At the same time, when the inclined part of the first screw rod 406 threadedly drives the limit plate 405 to slide with the drive block 410, it will gradually clamp the connecting plate 402 and make the sealing ring on the connecting plate 402 press against the connecting frame 401 to improve the sealing. In addition, the orifice plate 403 is driven by the connecting plate 402 to perform plug-in installation. There is no need to disassemble multiple parts during assembly and disassembly, and the orifice plate 403 can be replaced quickly, which improves the replacement efficiency. The provision of the two limit plates 405 can make the orifice plate 403 firmly installed between the two mounting tubes 9, thereby enhancing the stability.

[0043] When the mounting tube 9 is installed with the pipeline on the construction site, the adjusting ring 501 slides on the mounting tube 9, driving the fixing column 503 to move along the mounting tube 9, and inserting it into the flange hole of the pipeline after adjusting it to a suitable installation position. When the inclined part of the stop block 504 conflicts with the flange hole, the stop block 504 will drive the slide rod 505 to slide, and the slide rod 505 slides along the guide column 506. The first spring 507 contracts, and the setting of the guide column 506 allows the slide rod 505 to slide more smoothly. When it moves to the other side of the pipeline flange, the stop block 504 slides out of the fixing column 503 under the action of the first spring 507. At this time, insert the hexagonal wrench into the hexagonal groove on the second screw rod 509, rotate the second screw rod 509, and the second screw rod 509 will drive the connecting The ring 502 slides on the adjusting ring 501, so that the adjusting ring 501 drives multiple fixed columns 503 to move. When the fixed columns 503 move, they drive the blocks 504 to move, so that the blocks 504 are pressed tightly against the flange of the pipeline, completing the installation of the mounting tube 9. The second screw rod 509 drives the connecting ring 502 to simultaneously drive multiple blocks 504 to press tightly against the pipeline flange, thereby improving the installation efficiency of the flow meter mounting tube 9. When disassembling, first rotate the second screw rod 509 to make the blocks 504 no longer press tightly, and then pull the pull rod 608. The pull rod 608 drives the slip ring 604 to move. When the slip ring 604 slides, the second spring 607 contracts, and the slip ring 604 drives the limiting column 605 to no longer engage with the limiting hole 606. At this time, the driving ring 601 is driven to rotate through the connecting column 603. The drive shaft 508 rolls on the inclined surface 602 of the drive ring 601, and the drive shaft 508 drives the slide bar 505 to slide, so that the block 504 is retracted into the fixed column 503 again, and the pull rod 608 is released at the same time, so that the limiting column 605 on the slip ring 604 is clamped into the limiting hole 606 of the adjusting ring 501 under the action of the second spring 607. The limiting column 605 is engaged with the adjusting ring 501 to fix the rotating drive ring 601 and prevent it from rotating accidentally. There is no need to keep toggling the connecting column 603 when disassembling, which improves the operational flexibility. At the same time, multiple blocks 504 are driven to contract at the same time by one drive ring 601, which enhances the flexibility. When the fluid flows through the orifice plate 403, due to the throttling effect of the orifice plate 403, the flow beam is A local contraction is formed at the plate 403 and a static pressure difference is generated. Then, the three-valve group 7, the differential pressure transmitter 1 and the pressure guide tube 8 work together to complete the flow detection. The balancing valve in the three-valve group 7 is kept open before the system is started to balance the pressure at both ends of the pressure guide tube 8 to avoid impact damage to the differential pressure transmitter 1. During operation, the balancing valve is closed, and the high-pressure valve and the low-pressure valve are opened. The pressure guide tube 8 stably transmits the high-pressure and low-pressure signals before and after the orifice plate 403 to the differential pressure transmitter 1 to form a pressure difference. After the sensitive element inside the differential pressure transmitter 1 senses the pressure difference, it is converted into a standard current signal output through the conversion circuit. The signal corresponds to the pressure difference and the flow rate. Through a preset calculation program or formula, the output signal can be converted into an actual fluid flow value to realize flow detection.

[0044] 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 embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0045] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. An integrated differential pressure orifice flowmeter, characterized in that: The invention comprises a differential pressure transmitter (1), a three-valve group (7) installed on the differential pressure transmitter (1), two pressure-guiding pipes (8) installed on the three-valve group (7), two mounting pipes (9) installed on the two pressure-guiding pipes (8), a filter structure (2) installed on one of the mounting pipes (9), a mounting structure (4) installed between the two mounting pipes (9), and a fixing structure (5) installed on the mounting pipes (9); The filtering structure (2) comprises a mounting frame (201) detachably connected to the mounting tube (9) and a sliding frame (202) slidably connected to the mounting frame (201); a filter screen (203) is mounted on the sliding frame (202); a guide block (204) is fixedly connected to the sliding frame (202); the guide block (204) is slidably connected to the mounting tube (9); a collecting trough (207) is provided on the mounting frame (201); and the guide block (204) is driven by the driving structure (3); The driving structure (3) comprises a rotating shaft (301) rotatably connected to the guide block (204) and a connecting ball (302) fixedly connected to the rotating shaft (301); a connecting shaft (303) is rotatably connected to the mounting frame (201); two driving disks (304) are fixedly connected to the connecting shaft (303); and the connecting ball (302) and the driving disk (304) are in rolling engagement. The mounting structure (4) comprises a connecting frame (401) mounted between the two mounting tubes (9) and a connecting plate (402) detachably connected to the connecting frame (401), the connecting plate (402) being provided with a perforated plate (403), two fixing plates (404) being fixedly connected to the connecting frame (401), a limiting plate (405) being slidably connected to the fixing plate (404), the limiting plate (405) being slidably connected to the connecting plate (402), a first screw rod (406) being rotatably connected between the two fixing plates (404), the limiting plate (405) being threadedly connected to the first screw rod (406), and the threads at both ends of the first screw rod (406) being in opposite directions; The fixing structure (5) comprises an adjusting ring (501) slidably connected to the mounting tube (9) and a connecting ring (502) slidably connected to the adjusting ring (501); a plurality of fixing columns (503) are fixedly connected to the connecting ring (502); the fixing columns (503) are slidably connected to the mounting tube (9); a stop block (504) is slidably connected to the fixing columns (503); a second screw rod (509) is rotatably connected to the adjusting ring (501); and the connecting ring (502) is threadedly connected to the second screw rod (509); A sliding rod (505) is fixedly connected to the stop block (504), a guide column (506) is fixedly connected inside the fixed column (503), the sliding rod (505) is slidably connected to the guide column (506), a driving shaft (508) is rotatably connected to the sliding rod (505), and a first spring (507) is fixedly connected between the sliding rod (505) and the fixed column (503).

2. The integrated differential pressure orifice flowmeter according to claim 1, characterized in that: A guide rail (205) is provided on the installation frame (201), the guide block (204) is slidably connected to the guide rail (205), two guide rings (206) are fixedly connected to the slide frame (202), the guide rings (206) are slidably connected to the installation frame (201), a driving member (305) is installed in the installation frame (201), and the connecting shaft (303) is driven by the driving member (305).

3. The integrated differential pressure orifice flowmeter according to claim 2, characterized in that: A driving block (410) is fixedly connected to the connecting plate (402), the cross section of the driving block (410) is a triangular structure, and the inclined portion of the limiting plate (405) is in sliding engagement with the driving block (410).

4. The integrated differential pressure orifice flowmeter according to claim 3, characterized in that: A positioning sleeve (408) is fixedly connected to the connection frame (401), a positioning rod (409) is fixedly connected to the connection plate (402), and the positioning rod (409) is plugged into the positioning sleeve (408).

5. The integrated differential pressure orifice flowmeter according to claim 4, characterized in that: A guide rod (407) is fixedly connected between the two fixing plates (404), and the limiting plate (405) is slidably connected to the guide rod (407).

6. The integrated differential pressure orifice flowmeter according to claim 1, characterized in that: The drive shaft (508) is used in conjunction with a disassembly structure (6), the disassembly structure (6) comprising a drive ring (601) rotatably connected to the connecting ring (502) and a plurality of inclined surfaces (602) provided on the drive ring (601), the drive shaft (508) and the drive ring (601) being in rolling engagement, a connecting column (603) being fixedly connected to the drive ring (601), a slip ring (604) being slidably provided on the connecting column (603), a limiting column (605) being fixedly connected to the slip ring (604), two limiting holes (606) being provided on the adjusting ring (501), and the limiting column (605) being engaged with one of the limiting holes (606).

7. The integrated differential pressure orifice flowmeter according to claim 6, characterized in that: A pull rod (608) is fixedly connected to the slip ring (604), and a second spring (607) is fixedly connected between the slip ring (604) and the connecting column (603).

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