An insertable anti-blocking wedge flowmeter and its installation and disassembly method without stopping the flow

Abstract

The present invention discloses an insertion type anti-blocking wedge flowmeter and a method for installing and disassembling it without stopping the flow. It solves the technical problems that the existing flowmeter has an unreasonable structural design, is prone to dirt accumulation and wear, resulting in poor repeatability of detection results, low accuracy, and inability to meet the requirements of installing and disassembling without stopping the flow, causing serious economic losses. It includes a measuring head and a meter head. The upper end of the measuring head is connected with an insertion tube and is connected to the meter head through the insertion tube. The measuring head includes a measuring circular tube and a flow obstruction body. The upper part of the flow obstruction body is a circular arc structure that matches the inner side wall of the measuring circular tube and is seamlessly connected. The high-pressure pressure tapping port and the low-pressure pressure tapping port are respectively arranged on the side walls of the measuring circular tube at the front and rear ends of the flow obstruction body. The cross-section of the flow obstruction body is a right-angled triangular pyramid structure, whose first right-angled side is seamlessly connected to the inner side wall of the measuring circular tube, and whose second right-angled side is vertically downward with respect to the inner side wall of the measuring circular tube, and can be widely applied to the technical field of flowmeter structural design.

Description

Technical Field

[0001] The present invention relates to the technical field of flowmeter structure design, and particularly to an insertion type anti-blocking wedge flowmeter and a method for installing and disassembling the same without stopping the flow. Background Art

[0002] A differential pressure flowmeter is an instrument that measures the flow rate based on the differential pressure generated by a flow detection element installed in a pipeline, known fluid conditions, and the geometric dimensions of the detection element and the pipeline. A differential pressure flowmeter consists of a primary device (detection element) and a secondary device (differential pressure conversion and flow display instrument). Usually, the differential pressure flowmeter is classified according to the type of the detection element, such as orifice plate flowmeter, venturi tube flowmeter, and averaging pitot tube flowmeter, etc. The secondary installation is various mechanical, electronic, and mechatronic differential pressure gauges, differential pressure transmitters, and flow display and calculation instruments. It has developed into a large category of instruments with a very high degree of three-standardization (series, generalization, and standardization) and a large number of complex specifications. The differential pressure gauge can be used to measure flow parameters, and can also measure other parameters (such as pressure, liquid level, density, etc.). Among them, the averaging pitot tube flowmeter includes Annbar, Torbar, Probar, verabar, itabar, etc., which is based on the pitot tube velocity measurement principle, that is, a typical differential pressure type flow sensor, and is an insertion type flowmeter that estimates the flow rate by the flow velocity at the midpoint of the side pipeline.

[0003] In the past nearly a hundred years, differential pressure flowmeters have been extremely widely used in various flow medium fields all over the world in process control and flow measurement. The earliest differential pressure measurement device appeared in the 1840s after Bernoulli's theorem was proposed. Using this principle, flow nozzles, venturi tubes, and orifice plates that are sold all over the world were produced. Traditional differential pressure flowmeters throttle around the pipe wall, and the fluid flows through the center of the pipeline. Until the 1980s, Americans proposed a new throttling method, using a cone as the throttling element, which is suspended in the fluid pipeline. The fluid is compressed and rectified by the cone in the center of the pipeline and then flows along the pipe wall, overcoming the disadvantages brought by many defects of the traditional differential pressure flowmeter itself, such as unstable discharge coefficient, poor linearity, low repeatability, low accuracy, easy fouling and easy wear, small range ratio, high on-site installation conditions, etc. Currently, most of the cone differential pressure flowmeters on the market are full-pipe type structures, that is, the full-pipe body of the cone throttling element is directly connected to the fluid pipeline, and the pressure guiding pipe is directly led out from the full-pipe body. The full-pipe type conical differential pressure flowmeter has a large volume, heavy weight, high price, large pressure loss, especially for large-diameter flowmeters, which brings great inconvenience to installation and transportation, and the comprehensive cost is high. For example, when measuring sticky and dirty media, in case of blockage or cone scaling, only the production can be stopped for maintenance, and the application cost and the economic loss caused by production shutdown are relatively large. Currently, there are also insertion type vortex flowmeters on the market, which are afraid of vibration interference, high temperature, sticky contamination, poor accuracy, and narrow range.

[0004] In the prior art, although the insertion-type flowmeter has improved measurement accuracy and low maintenance costs, it is not very convenient to disassemble the meter head for the replacement and repair of the display. After long-term use, when faults such as damage and leakage occur in the display, it is necessary to disassemble the meter head for repair. In the traditional disassembly method, the flow needs to be stopped to replace and repair. The meter head needs to be completely disassembled to remove the display for repair. It is impossible to replace and repair the sensor without stopping the flow online, which wastes time and is troublesome to install. Stopping the flow for maintenance means that the production line has to stop production, and stopping production is a major taboo in modern production. For example, a petrochemical plant may lose millions of yuan or even more for one hour of production stoppage. The heat supply network not only affects production but also the normal life of the people. Therefore, users greatly expect a flowmeter with excellent performance, convenient installation, and online replaceability. Most current flowmeters need to be installed and disassembled under the condition of interrupted flow, which brings great difficulties to production enterprises. The following existing products are difficult to solve: 1. Some continuously producing enterprises want to install a flowmeter on old equipment; 2. The originally used flowmeter is damaged and needs to be replaced; 3. After the flowmeter is used for a period of time, the accuracy decreases, and it needs to be disassembled and sent to a third-party calibration agency for re-detection. In such cases, the flowmeter can only be installed and disassembled after the equipment stops flowing, which brings great losses to enterprise production, especially economically. In addition, most traditional flowmeters use a pipeline connection method, which is large in size, heavy in weight, extremely troublesome for transportation and installation, expensive in cost, large in pipeline resistance, and causes great economic losses for interrupted-flow installation and disassembly, with high comprehensive operating costs. Summary of the Invention

[0005] The present invention aims at the disadvantages and deficiencies existing in the prior art, and provides an insertion-type anti-blocking wedge-shaped flowmeter and its non-stop-flow installation and disassembly method with a simple and ingenious device structure, which can effectively prevent blockage during use, ensure the accuracy and precision of flowmeter detection, significantly improve the service life, have a simple non-stop-flow installation and disassembly method, save time and effort, meet the non-stop-flow requirements for the installation and disassembly of the flowmeter in the current production process, significantly reduce the installation and disassembly costs of the flowmeter, especially facilitate the regular detection and correction of the flowmeter during production, ensure the accuracy and precision of detection, significantly improve work efficiency, meet the requirements of non-stop-flow maintenance and correction in modern production, ensure the continuity of production, and have a wide range of applicable scopes.

[0006] To this end, the present invention provides an insertable anti-blocking wedge flowmeter, comprising a measuring head and a meter head. The interior of the meter head includes a pressure detection device and a display screen, and the pressure detection device is electrically connected to the display screen; the upper end of the measuring head is connected with an insertion pipe, and is connected to the meter head through the insertion pipe. The measuring head includes a measuring circular pipe and a flow obstructing body, and the flow obstructing body is fixedly arranged inside the measuring circular pipe. The upper part of the flow obstructing body is an arc-shaped structure that matches and is seamlessly connected to the inner side wall of the measuring circular pipe; two pressure tapping pipes are also connected to the top of the measuring circular pipe, namely a high-pressure pressure tapping pipe and a low-pressure pressure tapping pipe, and their corresponding high-pressure pressure tapping ports and low-pressure pressure tapping ports are respectively arranged on the side walls of the measuring circular pipe at the front and rear ends of the flow obstructing body; the cross-section of the flow obstructing body is a right-angled triangular pyramid structure, its first right-angled side is seamlessly connected to the inner side wall of the measuring circular pipe, its second right-angled side is vertically downwardly arranged with respect to the inner side wall of the measuring circular pipe, and an internal low-pressure pressure guiding pipe that is attached and downwardly arranged with respect to the second right-angled side is also connected at the low-pressure pressure tapping port.

[0007] Preferably, the length of the second right-angled side of the flow obstructing body is greater than the radius of the measuring circular pipe, and the length of the internal low-pressure pressure guiding pipe is less than the radius of the measuring circular pipe.

[0008] Preferably, the upper parts of the high-pressure pressure tapping pipe and the low-pressure pressure tapping pipe are both arranged inside the insertion pipe, and are connected to the pressure detection device inside the meter head at the top end thereof through the insertion pipe.

[0009] Preferably, a first sealing valve is installed at the upper end of the insertion pipe, and the first sealing valve is fixed on a first sealing flange fixed base welded to the pipeline, and its upper end is tightly fixed through a second sealing flange seat.

[0010] Preferably, a flowmeter lifting device is connected to the upper end of the second sealing flange seat. The flowmeter lifting device includes a flowmeter lifting base, a lifting screw rod, and a lead screw lifting handrail. The bottom of the flowmeter lifting base is connected to the joint of the second sealing flange seat, and its upper part is connected to the lead screw lifting handrail. By rotating the lead screw lifting handrail, the lifting of the lifting screw rod is adjusted, driving the lifting of the insertion pipe, and finally controlling the lifting of the measuring head.

[0011] Preferably, a meter head is connected above the lead screw lifting handrail, and a self-locking fastening device is also connected to the lifting screw rod between the flowmeter lifting base and the lead screw lifting handrail.

[0012] Preferably, the first sealing valve is a rotary ball valve or a flat gate valve; the measuring head is made of stainless steel.

[0013] The method for installing and disassembling a non-stop flow of an insertable anti-blocking wedge flowmeter according to any one of the above, the specific installation process is as follows:

[0014] (1) Point selection and fixation: First, weld the first sealing flange fixing base of the plug-type anti-blocking wedge flowmeter to the process pipeline, then connect and fix the first sealing valve to the first sealing flange fixing base, compress and fix its upper end through the second sealing flange seat, and keep the valve of the first sealing valve in the closed state;

[0015] (2) Drilling: After connecting and fixing the pipeline special drilling equipment to the first sealing valve, open the valve of the first sealing valve, start the pipeline special drilling equipment to perform drilling operations on the process pipeline. After the drilling operation is completed, close the valve of the first sealing valve, and then remove the pipeline special drilling equipment;

[0016] (3) Installation: After connecting and fixing the flowmeter lifting device to the first sealing valve through the second sealing flange seat, open the valve of the first sealing valve, rotate the screw lifting handrail, adjust the lifting of the lifting screw, slowly screw the lifting screw downward, drive the descent of the insertion pipe, and finally control the descent and installation of the measuring head into the process pipeline. After rotating in place and adjusting the direction of the measuring head, then tighten the bolts of the self-locking fastening device on the lifting screw to complete the installation work of the flowmeter without stopping the flow.

[0017] Preferably, the specific disassembly process is as follows:

[0018] First, loosen the bolts of the self-locking fastening device on the lifting screw of the plug-type anti-blocking wedge flowmeter installed in step (3) appropriately to ensure that the lifting screw can rotate. Then, rotate the screw lifting handrail in the reverse direction to rotate the measuring head upward to the top, that is, higher than the first sealing valve. After that, close the valve of the first sealing valve and loosen the fastening bolts of the second sealing flange seat to complete the disassembly work of the flowmeter without stopping the flow.

[0019] Preferably, in step (3), after rotating in place and adjusting the direction of the measuring head: set the central axis of the pressure measuring chamber inside the measuring round pipe to coincide with the central axis of the process pipeline, and along the direction of fluid flow, place the high-pressure pressure tapping port of the measuring round pipe in front of the low-pressure pressure tapping port, so that the tip of the flow resistance body points in the opposite direction of fluid flow.

[0020] The beneficial effects of the present invention are:

[0021] (1) The plug-in anti-blocking wedge flowmeter of the present invention that can be disassembled and assembled without stopping the flow. According to the principle of fluid mechanics, its device structure is simple and ingenious, and the design is scientific and reasonable. It can effectively prevent blockage during use, ensure the accuracy and precision of the flowmeter detection, and significantly improve the service life. The installation and operation are convenient, time-saving and labor-saving. It can realize the installation and disassembly of the plug-in anti-blocking wedge flowmeter of the present invention under the condition of non-stop flow operation, meet the production requirements of non-stop maintenance in modern production, significantly reduce the production and maintenance costs, and ensure the long-term effectiveness of the detection results, with a long service life.

[0022] (2) The method for non-stop installation and disassembly of the plug-in anti-blocking wedge flowmeter of the present invention is simple, time-saving and labor-saving. It meets the non-stop flow requirements for the installation and disassembly of the flowmeter in the current production process, significantly reduces the installation and disassembly costs of the flowmeter, especially facilitates the regular detection and correction of the flowmeter during the production process, ensures the accuracy and precision of the detection, significantly improves the work efficiency, meets the requirements of non-stop maintenance and correction in modern production, ensures the continuous production, and has a wide applicable range.

[0023] The non-stop installation method of the plug-in anti-blocking wedge flowmeter of the present invention realizes the non-stop installation of the flowmeter throughout the process, realizes on-line non-stop installation, which is time-saving and labor-saving, significantly improves the installation efficiency and saves the installation cost, and meets the requirements of non-stop installation in modern production. At the same time, it also ensures stable discharge coefficient, high repeatability of detection data results, high accuracy, not easy to accumulate dirt and wear, long service life, and significantly saves the production and installation costs.

[0024] The non-stop disassembly method of the plug-in anti-blocking wedge flowmeter of the present invention can be disassembled non-stop according to actual needs at any time during use. It is time-saving and labor-saving, with low maintenance and detection costs, and is convenient for regular detection and correction of the plug-in anti-blocking wedge flowmeter of the present invention during the production process, ensures the accuracy and precision of the detection, significantly improves the work efficiency, meets the requirements of non-stop maintenance and correction in modern production, and ensures the continuous production. Description of the Drawings

[0025] Figure 1 is the structural schematic diagram of the present invention;

[0026] Figure 2 is Figure 1 the structural schematic diagram of the measuring head in

[0027] Figure 3 is Figure 1 the structural schematic diagram of the flowmeter lifting device in

[0028] Figure 4 the structural schematic diagram of the device for the non-stop installation punching process of the plug-in anti-blocking wedge flowmeter of the present invention.

[0029] Markings in the figure: 1. Measuring head, 2. Meter head, 3. Insertion tube, 4. Measuring circular tube, 5. Flow obstruction body, 6. High-pressure pressure tapping tube, 7. Low-pressure pressure tapping tube, 8. High-pressure pressure tapping port, 9. Low-pressure pressure tapping port, 10. Second right-angled side, 11. First right-angled side, 12. First sealing valve, 13. Pipeline, 14. First sealing flange fixing base, 15. Second sealing flange seat, 16. Flowmeter lifting base, 17. Lifting screw, 18. Screw lifting handrail, 19. Self-locking fastening device, 20. Special pipe punching equipment for pipelines, 21. Internal low-pressure pressure guiding tube. Specific implementation manners

[0030] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments to help understand the content of the present invention.

[0031] The methods used in the present invention are all conventional methods without special regulations; the raw materials and devices used are all conventional commercially available products without special regulations.

[0032] As Figures 1-3 shown, the present invention provides an insertion type anti-blocking wedge flowmeter, including a measuring head 1 and a meter head 2. The inside of the meter head 2 includes a pressure detection device and a display screen, and the pressure detection device is electrically connected to the display screen; the upper end of the measuring head 1 is connected with an insertion tube 3 and is connected to the meter head 2 through the insertion tube 3. The measuring head 1 includes a measuring circular tube 4 and a flow obstruction body 5. The flow obstruction body 5 is fixedly arranged inside the measuring circular tube 4. The upper part of the flow obstruction body 5 is an arc-shaped structure that matches the inner side wall of the measuring circular tube 4 and is seamlessly connected; two pressure tapping tubes are also connected to the top of the measuring circular tube 4, namely a high-pressure pressure tapping tube 6 and a low-pressure pressure tapping tube 7. The corresponding high-pressure pressure tapping port 8 and low-pressure pressure tapping port 9 are respectively arranged on the side walls of the measuring circular tube 4 at the front and rear ends of the flow obstruction body 5; the cross-section of the flow obstruction body 5 is a right-angled triangular pyramid structure. Its first right-angled side 11 is seamlessly connected to the inner side wall of the measuring circular tube 4, and its second right-angled side 10 is vertically downward with respect to the inner side wall of the measuring circular tube 4. An internal low-pressure pressure guiding tube 21 that fits and extends downward with the second right-angled side 10 is also connected at the low-pressure pressure tapping port 9. In the use process of such a measuring head 1 structure, the fluid flowing through the high-pressure pressure tapping port 8 at the front tip of the flow obstruction body 5 can effectively flow through the hypotenuse of the flow obstruction body 5, and the tip high-pressure pressure tapping port 8 can effectively measure the pressure at the front end; the low-pressure pressure tapping port 9 at the second right-angled side 10 at the rear end of the flow obstruction body 5 is in a vacuum state. On the one hand, it can effectively measure the pressure at the low-pressure pressure tapping port 9, and on the other hand, it can effectively prevent it from being blocked by the fluid, ensuring the detection accuracy, effectively avoiding the situation of fouling of the high-pressure pressure tapping tube 6 and the low-pressure pressure tapping tube 7, and making the detection more durable.

[0033] The length of the second right-angled side 10 of the fluid-blocking body 5 is greater than the radius of the measuring circular pipe 4, and the length of the internal low-pressure pressure guiding pipe 9 is less than the radius of the measuring circular pipe 4, further ensuring the accuracy and precision of detection, effectively preventing the low-pressure pressure tapping pipe 7 from being contaminated, and ensuring the durability of detection.

[0034] The upper parts of the high-pressure pressure tapping pipe 6 and the low-pressure pressure tapping pipe 7 are both arranged inside the insertion pipe 3, and are connected to the pressure detection device inside the meter head 2 at its top through the insertion pipe 3, realizing real-time and effective monitoring of the fluid medium in the pipeline.

[0035] A first sealing valve 12 is installed at the upper end of the insertion pipe 3, and the first sealing valve 12 is a rotary ball valve; the first sealing valve 12 is fixed on the first sealing flange fixed base 14 welded to the pipeline 13, and its upper end is tightly fixed through the second sealing flange seat 15. A flowmeter lifting device is connected to the upper end of the second sealing flange seat 15. The flowmeter lifting device includes a flowmeter lifting base 16, a lifting screw 17, and a lead screw lifting handrail 18. The bottom of the flowmeter lifting base 16 is connected to the joint of the second sealing flange seat 15, and its upper part is connected to the lead screw lifting handrail 18. By rotating the lead screw lifting handrail 18, the lifting of the lifting screw 17 is adjusted, driving the lifting of the insertion pipe 3, and finally controlling the lifting of the measuring head 1. The installation and operation are convenient, time-saving and labor-saving. The installation and disassembly of the plug-in anti-blocking wedge flowmeter of the present invention can be completed under the non-stop flow operation state, meeting the production requirements of non-stop flow maintenance in modern production, significantly reducing the production and maintenance costs, ensuring the long-term effectiveness of the detection results, and having a long service life.

[0036] A meter head 2 is connected above the lead screw lifting handrail 18, and a self-locking fastening device 19 is also connected to the lifting screw 17 between the flowmeter lifting base 16 and the lead screw lifting handrail 18. During use, the self-locking fastening device 19 can be selected to be fastened or loosened according to actual needs at any time, realizing the fixation and adjustment of the lifting screw 17.

[0037] The measuring head 1 is made of stainless steel, is not easy to rust, keeps the structure of the whole device firm and durable, is not easy to stick to the fluid, and has a long service life.

[0038] A method for non-stop installation and disassembly of a plug-in anti-blocking wedge flowmeter

[0039] The non-stop installation process of the plug-in anti-blocking wedge flowmeter of the present invention includes:

[0040] (1) Point selection and fixation: First, weld the first sealing flange fixed base 14 of the plug-in anti-blocking wedge flowmeter on the process pipeline 13, then connect and fix the first sealing valve 12 to the first sealing flange fixed base 14, and tightly fix its upper end through the second sealing flange seat 15, and keep the valve of the first sealing valve 12 in the closed state;

[0041] (2) Punching: As Figure 4 shown, after connecting and fixing the special pipe punching device 20 to the first sealing valve 12, open the valve of the first sealing valve 12, start the special pipe punching device 20 to perform punching operations on the process pipe 13. After the punching operations are completed, close the valve of the first sealing valve 12, and then remove the special pipe punching device 20;

[0042] (3) Installation: After connecting and fixing the flowmeter lifting device to the first sealing valve 12 through the second sealing flange seat 15, open the valve of the first sealing valve 12, rotate the screw lifting handrail 18 to adjust the lifting of the lifting screw 17, slowly screw the lifting screw 17 downward to drive the descent of the insertion pipe 3, and finally control the descent and installation of the measuring head 1 into the interior of the process pipe 13. After rotating in place and adjusting the direction of the measuring head 1: Align the central axis of the pressure measuring chamber inside the measuring round pipe 4 with the central axis of the process pipe 13, and along the direction of fluid flow, place the high-pressure pressure tapping 8 of the measuring round pipe 4 in front of the low-pressure pressure tapping 9, so that the tip of the flow blocker 5 points in the opposite direction of fluid flow; then tighten the bolts of the self-locking fastening device 19 on the lifting screw 17 to complete the installation of the flowmeter without stopping the flow.

[0043] When the fluid passes through the measuring head 1, a pressure difference is formed upstream and downstream of the flow blocker 5. The upstream of the tip of the flow blocker 5 (at the high-pressure pressure tapping 8) is PH, the downstream (low-pressure pressure tapping 9) is PL, and the differential pressure is △P, △P = PH - PL. This differential pressure is transmitted through the high-pressure pressure tapping pipe 6 and the low-pressure pressure tapping pipe 7 to the differential pressure transmitter of the pressure detection device inside the meter head 2. According to Bernoulli's theorem, with this flowmeter calculation formula, the flow rate of the fluid in the pipe can be accurately measured.

[0044] The non-stop installation method of the plug-in anti-blocking wedge-shaped flowmeter of the present invention realizes the non-stop installation of the flowmeter throughout the process, realizes on-line non-stop installation, saves time and effort, significantly improves the installation efficiency and saves the installation cost, meeting the requirements of modern production for non-stop installation. At the same time, it also ensures stable discharge coefficient, high repeatability of detection data results, high accuracy, not easy to accumulate dirt and wear, long service life, and significantly saves the production and installation cost.

[0045] The non-stop disassembly process of the plug-in anti-blocking wedge-shaped flowmeter of the present invention is as follows:

[0046] First, on the plug-in anti-blocking wedge flowmeter installed in step (3), loosen the bolts of the self-locking fastening device 19 on the lifting screw rod 17 appropriately to ensure that the lifting screw rod 17 can rotate. Then, rotate the screw rod lifting handrail 18 in the reverse direction to rotate the measuring head 1 upward to the topmost position, that is, higher than the first sealing valve 12. Then, close the valve of the first sealing valve 12 and loosen the fastening bolts of the second sealing flange seat 15, thus completing the non-stop flow disassembly of the flowmeter. During the use process, the non-stop flow disassembly of the plug-in anti-blocking wedge flowmeter of the present invention can be carried out at any time according to actual needs, which saves time and effort, has a low maintenance and detection cost, and is convenient for regularly detecting and correcting the plug-in anti-blocking wedge flowmeter of the present invention during the production process, ensuring the accuracy and precision of detection, significantly improving work efficiency, meeting the needs of non-stop flow maintenance and correction in modern production, and ensuring the continuity of production.

[0047] In summary, the plug-in anti-blocking wedge flowmeter with non-stop flow disassembly and installation of the present invention has a simple and ingenious device structure, effectively prevents blockage during use, ensures the accuracy and precision of flowmeter detection, and significantly improves the service life. The method for non-stop flow installation and disassembly of the plug-in anti-blocking wedge flowmeter of the present invention is simple, time-saving and labor-saving, meets the non-stop flow requirements for the installation and disassembly of the flowmeter in the current production process, significantly reduces the installation and disassembly costs of the flowmeter, especially facilitates the regular detection and correction of the flowmeter during the production process, ensures the accuracy and precision of detection, significantly improves work efficiency, meets the needs of non-stop flow maintenance and correction in modern production, ensures the continuity of production, and has a wide applicable range.

[0048] The above are only the embodiments of the present invention. For example, the first sealing valve 12 is a rotary ball valve or a flat gate valve, and both can implement the plug-in anti-blocking wedge flowmeter of the present invention and its method for non-stop flow installation and disassembly.

[0049] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "top", "bottom", "front", "rear", "inner", "outer", "middle", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present invention.

[0050] However, the above are only the specific embodiments of the present invention, and the scope of implementation of the present invention cannot be limited thereby. Therefore, the replacement of equivalent components or the equivalent changes and modifications made according to the scope of patent protection of the present invention should still fall within the scope covered by the claims of the present invention.

Claims

1. An insertion type anti-blocking wedge flowmeter, comprising a measuring head and a meter head. The interior of the meter head includes a pressure detection device and a display screen, and the pressure detection device is electrically connected to the display screen; the upper end of the measuring head is connected with an insertion pipe and is connected to the meter head through the insertion pipe, and is characterized in that, The measuring head includes a measuring circular tube and a flow blocking body. The flow blocking body is fixedly arranged inside the measuring circular tube. The upper part of the flow blocking body is an arc-shaped structure that matches the inner side wall of the measuring circular tube and is seamlessly connected. Two pressure tapping pipes are also connected to the top of the measuring circular tube, namely a high-pressure pressure tapping pipe and a low-pressure pressure tapping pipe. The corresponding high-pressure pressure tapping port and low-pressure pressure tapping port are respectively arranged on the side walls of the measuring circular tube at the front and rear ends of the flow blocking body. The cross-section of the flow blocking body is a right-angled triangular pyramid structure. Its first right-angled side is seamlessly connected to the inner side wall of the measuring circular tube, and its second right-angled side is vertically downward with respect to the inner side wall of the measuring circular tube. An internal low-pressure pressure guiding pipe that fits and extends downward along the second right-angled side is also connected at the low-pressure pressure tapping port.

2. The insertion type anti-blocking wedge flowmeter according to claim 1, characterized in that, The length of the second right-angled side of the flow blocking body is greater than the radius of the measuring circular tube, and the length of the internal low-pressure pressure guiding pipe is less than the radius of the measuring circular tube.

3. The insertion type anti-blocking wedge flowmeter according to claim 1, characterized in that, The upper parts of the high-pressure pressure tapping pipe and the low-pressure pressure tapping pipe are both arranged inside the insertion pipe and are connected to the pressure detection device inside the meter head at its top through the insertion pipe.

4. The insertion type anti-blocking wedge flowmeter according to claim 3, characterized in that, A first sealing valve is installed at the upper end of the insertion pipe. The first sealing valve is fixed on the first sealing flange fixed base welded to the pipeline, and its upper end is tightly fixed through the second sealing flange seat.

5. The insertion type anti-blocking wedge flowmeter according to claim 4, characterized in that, A flowmeter lifting device is connected to the upper end of the second sealing flange seat. The flowmeter lifting device includes a flowmeter lifting base, a lifting screw rod, and a lead screw lifting handrail. The bottom of the flowmeter lifting base is connected to the joint of the second sealing flange seat, and its upper part is connected to the lead screw lifting handrail. By rotating the lead screw lifting handrail, the lifting of the lifting screw rod is adjusted, driving the lifting of the insertion pipe, and finally controlling the lifting of the measuring head.

6. The insertion type anti-blocking wedge flowmeter according to claim 5, characterized in that, The meter head is connected above the lead screw lifting handrail, and a self-locking fastening device is also connected to the lifting screw rod between the flowmeter lifting base and the lead screw lifting handrail.

7. The insertion type anti-blocking wedge flowmeter according to claim 5, characterized in that, The first sealing valve is a rotary ball valve or a flat gate valve; the measuring head is made of stainless steel.

8. A method for installing and disassembling the insertion type anti-blocking wedge flowmeter according to any one of claims 1-7 without stopping the flow, characterized in that, The specific installation process is as follows: (1) Point selection and fixation: First, weld the first sealing flange fixed base of the insertion type anti-blocking wedge flowmeter on the process pipeline, then connect and fix the first sealing valve to the first sealing flange fixed base, and its upper end is tightly fixed through the second sealing flange seat, and keep the valve of the first sealing valve in the closed state. (2) Drilling: After connecting and fixing the pipeline special drilling equipment to the first sealing valve, open the valve of the first sealing valve, start the pipeline special drilling equipment to perform drilling operations on the process pipeline. After the drilling operation is completed, close the valve of the first sealing valve, and then remove the pipeline special drilling equipment. (3) Installation: After connecting and fixing the flowmeter lifting device to the first sealing valve through the second sealing flange seat, open the valve of the first sealing valve, rotate the screw lifting handrail, adjust the lifting of the lifting screw, slowly screw the lifting screw downward, drive the descent of the insertion tube, and finally control the descent of the measuring head and install it into the process pipeline. After rotating in place and adjusting the direction of the measuring head, then bolt-fasten the self-locking fastening device on the lifting screw to complete the installation work of the flowmeter without stopping the flow.

9. The method for installing and disassembling the insertion type anti-blocking wedge flowmeter according to claim 8, characterized in that, The specific disassembly process is as follows: First, loosen the bolts of the self-locking fastening device on the lifting screw of the plug-in anti-blocking wedge flowmeter installed in step (3) appropriately to ensure that the lifting screw can rotate. Then, rotate the screw lifting handrail in the reverse direction to rotate the measuring head up to the top, that is, higher than the first sealing valve. After that, close the valve of the first sealing valve and loosen the fastening bolts of the second sealing flange seat to complete the disassembly work of the flowmeter without stopping the flow.

10. The method for installing and disassembling the insertion type anti-blocking wedge flowmeter according to claim 8, characterized in that, In step (3), after rotating in place, the direction of the measuring head is adjusted as follows: The central axis of the pressure measuring chamber inside the measuring round tube is set to coincide with the central axis of the process pipeline. And along the direction of fluid flow, the high-pressure pressure tapping port of the measuring round tube is placed in front of the low-pressure pressure tapping port, so that the tip of the flow blocker points in the opposite direction of fluid flow.

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