CN110987098A - Plug-in type anti-blocking wedge-shaped flowmeter and non-stop mounting and dismounting method thereof - Google Patents
Plug-in type anti-blocking wedge-shaped flowmeter and non-stop mounting and dismounting method thereof Download PDFInfo
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- CN110987098A CN110987098A CN201911165037.9A CN201911165037A CN110987098A CN 110987098 A CN110987098 A CN 110987098A CN 201911165037 A CN201911165037 A CN 201911165037A CN 110987098 A CN110987098 A CN 110987098A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
- G01F1/36—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction
- G01F1/40—Details of construction of the flow constriction devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
- G01F1/50—Correcting or compensating means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/12—Cleaning arrangements; Filters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/18—Supports or connecting means for meters
- G01F15/185—Connecting means, e.g. bypass conduits
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
- G01F25/10—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters
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Abstract
The invention discloses an inserted anti-blocking wedge-shaped flowmeter and a non-stop flow mounting and dismounting method thereof, which solve the technical problems that the structural design of the existing flowmeter is unreasonable, the existing flowmeter is easy to accumulate and wear, the repeatability of a detection result is poor, the accuracy is low, the mounting and dismounting requirements of non-stop flow cannot be realized, and the economic loss is serious; the high-pressure taking port and the low-pressure taking port are respectively arranged on the side walls of the measuring circular tubes at the front end and the rear end of the bluff body; the cross section of the flow blocking body is of a direct triangular cone structure, a first right-angle edge of the flow blocking body is in seamless connection with the inner side wall of the measuring circular tube, a second right-angle edge of the flow blocking body is vertically and downwards arranged on the inner side wall of the measuring circular tube, and the flow blocking body can be widely applied to the technical field of flow meter structural design.
Description
Technical Field
The invention relates to the technical field of flowmeter structural design, in particular to an insertion type anti-blocking wedge-shaped flowmeter and a non-stop assembly and disassembly method thereof.
Background
Differential pressure flow meters are meters that measure flow based on the differential pressure generated by a flow sensing member installed in a pipe, known fluid conditions, and the geometry of the sensing member and the pipe. The differential pressure flowmeter consists of a primary device (detection part) and a secondary device (differential pressure conversion and flow display instrument). Differential pressure flow meters are generally classified in the form of test pieces, such as orifice plate flow meters, venturi flow meters, and averaging tube flow meters. The secondary installation is various mechanical, electronic and electromechanical integrated differential pressure meters, differential pressure transmitters and flow display and calculation instruments, and the secondary installation is developed into a large class of instruments with high degree of three types (serialization, universalization and standardization) and various specifications. The differential pressure gauge can be used to measure both flow parameters and other parameters (e.g., pressure, level, density, etc.). The averaging pitot tube flowmeter comprises an Annbar, Torbar, Probar, verabar, itabar and the like, and is an insertion type flowmeter which calculates the flow by using the flow velocity of the midpoint of a side pipeline based on a pitot tube speed measurement principle, namely a typical differential pressure type flow sensor.
Differential pressure flow meters have been used successfully in process control and flow metering applications in a wide variety of flow media areas throughout the world over the last hundred years. The earliest differential pressure measurement devices were generated in the forty decades of the eighteenth century after the proposal of bernoulli's theorem, and the flow nozzles, venturi tubes and orifice plates of the marketing world were produced using this principle. Conventional differential pressure flow meters are throttled around the walls of the pipe and fluid flows through the center of the pipe. Until the eighties of the twentieth century, americans proposed a new throttling mode, and used a cone as a throttling element, which was suspended in a fluid pipeline, and the fluid flowed along the pipe wall after being compressed and rectified by the cone at the center of the pipeline, thus overcoming the defects caused by the self-structure of the traditional differential pressure type flowmeter, such as: the flow coefficient is unstable, the linearity is poor, the repeatability is low, the accuracy is low, the dirt accumulation and the abrasion are easy to occur, the measuring range ratio is small, the field installation condition is high, and the like. At present, most of cone differential pressure flowmeters in the market are full-pipe type structures, namely, a full-pipe meter body of a cone throttling element is directly connected with a fluid pipeline, and a pressure guiding pipe is directly led out from the full-pipe meter body. The full-tube type conical differential pressure flowmeter is large in size, heavy in weight, high in price and pressure loss, particularly, a large-caliber flowmeter is prominent, great inconvenience is brought to installation and transportation, comprehensive cost is high, production maintenance can only be stopped when blockage or cone scaling occurs in the case of measuring a sticky medium, and economic loss caused by application cost and production stop is large. At present, the market also has an inserted vortex shedding flowmeter which is afraid of vibration interference, high temperature and dirt sticking, poor in precision and narrow in measuring range.
Among the prior art, although measuring accuracy of bayonet flowmeter improves, the maintenance cost is low, but can not be very convenient dismantle the change and the maintenance to the display to the gauge outfit, long-time use, when the trouble such as damage and reveal can appear easily in the display, just need dismantle gauge outfit maintenance, traditional dismantlement mode, need to stop flowing and just can change the maintenance, take the gauge outfit apart completely, just can take out the display, to its maintenance, can not realize not stopping flowing to change at the line and overhaul the sensor, thus waste time, and the installation is troublesome. The flow stopping maintenance means that the production line needs to be stopped, the production stopping is a great contraindication in the modern production, for example, millions of yuan or even more can be lost when a petrochemical plant stops production for one hour, and the heat supply pipe network not only influences the production, but also influences the normal life of common people. Thus, a high user desire for an on-line replaceable flow meter that is excellent in performance, easy to install, and convenient. Most of the existing flowmeters are required to be mounted and dismounted under the condition of flow breaking, great difficulty is brought to production enterprises, and the existing products under the following conditions are difficult to solve: 1. some continuous production enterprises want to add flow meters on old equipment; 2. the originally used flowmeter is damaged and needs to be replaced; 3. the accuracy decreases over time after the meter is used for a period of time, and the meter is removed and re-tested by a third party certification authority. In these situations, the flow meter can be mounted and dismounted only after the production and the flow of the equipment are stopped and cut off, which brings great loss to the production of enterprises, especially in the economic aspect. In addition, most of traditional flowmeters adopt a pipeline connection mode, the size is large, the weight is heavy, great troubles are brought to transportation and installation, the manufacturing cost is high, the pipeline resistance is large, the economic loss caused by flow-breaking installation and disassembly is large, and the comprehensive operation cost is high.
Disclosure of Invention
Aiming at the defects and shortcomings in the prior art, the invention provides the plug-in type anti-blocking wedge-shaped flowmeter and the non-stop flow mounting and dismounting method thereof, wherein the plug-in type anti-blocking wedge-shaped flowmeter has a simple and ingenious device structure, the blocking condition is effectively prevented in the using process, the accuracy and the precision of the flowmeter detection are ensured, the service life is obviously prolonged, the non-stop flow mounting and dismounting method is simple, time and labor are saved, the non-stop flow requirement in the flow meter mounting and dismounting process in the existing production process is met, the mounting and dismounting cost of the flowmeter is obviously reduced, the regular detection and correction of the flowmeter in the production process are particularly convenient, the accuracy and the precision of the detection are ensured, the working efficiency is obviously improved, the requirement of the modern production non-stop flow maintenance and correction is met.
Therefore, the invention provides an insertion type anti-blocking wedge-shaped flowmeter which comprises a measuring head and a gauge head, wherein the gauge head internally comprises a pressure detection device and a display screen, and the pressure detection device is electrically connected with the display screen; the upper end of the measuring head is connected with an inserting pipe and is connected with the gauge outfit through the inserting pipe, the measuring head comprises a measuring circular pipe and a flow blocking body, the flow blocking body is fixedly arranged in the measuring circular pipe, and the upper part of the flow blocking body is of a circular arc structure which is matched with the inner side wall of the measuring circular pipe and is in seamless connection with the inner side wall of the measuring circular pipe; the top of the measuring circular tube is also connected with two pressure tapping pipes, namely a high-pressure tapping pipe and a low-pressure tapping pipe, and the corresponding high-pressure tapping port and the corresponding low-pressure tapping port are respectively arranged on the side walls of the measuring circular tube at the front end and the rear end of the bluff body; the cross section of the bluff body is of a direct triangular cone structure, a first right-angle edge of the bluff body is in seamless connection with the inner side wall of the measuring round tube, a second right-angle edge of the bluff body is vertically arranged downwards with the inner side wall of the measuring round tube, and a low-pressure taking opening is further connected with an internal low-pressure guiding tube which is attached to the second right-angle edge and arranged downwards.
Preferably, the length of the second right-angle side of the flow blocking body is larger than the radius of the measuring circular tube, and the length of the internal low-pressure guiding tube is smaller than the radius of the measuring circular tube.
Preferably, the upper parts of the high-pressure sampling pipe and the low-pressure sampling pipe are arranged in the insertion pipe and are connected with a pressure detection device in the gauge outfit at the top end of the insertion pipe.
Preferably, the upper end of the insertion pipe is provided with a first sealing valve, the first sealing valve is fixed on a first sealing flange fixing base welded with the pipeline, and the upper end of the first sealing valve is pressed and fixed through a second sealing flange seat.
Preferably, the upper end of the second sealing flange seat is connected with a flowmeter lifting device, the flowmeter lifting device comprises a flowmeter lifting base, a lifting screw rod and a screw rod lifting handrail, the bottom of the flowmeter lifting base is connected with a joint of the second sealing flange seat, the upper portion of the flowmeter lifting base is connected with the screw rod lifting handrail, the lifting of the lifting screw rod is adjusted by rotating the screw rod lifting handrail, the lifting of the insertion pipe is driven, and the lifting of the measuring head is finally controlled.
Preferably, the meter head is connected above the screw lifting handrail, and the lifting screw between the flowmeter lifting base and the screw lifting handrail is also connected with a self-locking fastening device.
Preferably, the first sealing valve is a rotary ball valve or a plane gate valve; the measuring head is made of stainless steel.
The non-stop mounting and dismounting method for the plug-in type anti-blocking wedge-shaped flowmeter comprises the following specific mounting processes:
(1) point selection and fixation: welding a first sealing flange fixing base of the plug-in type anti-blocking wedge-shaped flowmeter on a process pipeline, connecting and fixing a first sealing valve and the first sealing flange fixing base, compressing and fixing the upper end of the first sealing valve through a second sealing flange seat, and keeping the valve of the first sealing valve in a closed state;
(2) punching: after connecting and fixing the special pipeline punching equipment and the first sealing valve, opening the valve of the first sealing valve, starting the special pipeline punching equipment to punch on the process pipeline, and after the punching operation is finished, closing the valve of the first sealing valve, and then removing the special pipeline punching equipment;
(3) installation: after the flowmeter lifting device is connected and fixed with the first sealing valve through the second sealing flange seat, the valve of the first sealing valve is opened, the lead screw lifting handrail is rotated to adjust the lifting of the lifting screw rod, the lifting screw rod is slowly screwed downwards to drive the insertion pipe to descend, the measuring head is finally controlled to descend and be installed into the process pipeline, after the measuring head is rotated to the position and the direction of the measuring head is adjusted, the self-locking fastening device on the lifting screw rod is fastened by bolts, and the non-stop installation work of the flowmeter is completed.
Preferably, the specific disassembly process is as follows:
firstly, on the inserted anti-blocking wedge-shaped flowmeter which is installed in the step (3), the bolt of the self-locking fastening device on the lifting screw rod is appropriately unscrewed to ensure that the lifting screw rod can rotate, then the screw rod lifting handrail is reversely rotated to rotatably lift the measuring head to the topmost end, namely, the measuring head is higher than the first sealing valve, then the valve of the first sealing valve is closed, the fastening bolt of the second sealing flange seat is loosened, and the continuous-flow disassembly work of the flowmeter is completed.
Preferably, in step (3), the direction of the adjusting measuring head after rotating to the position is: the central axis of the pressure measuring cavity inside the measuring circular tube is superposed with the central axis of the process pipeline, and the high-pressure tapping port of the measuring circular tube is arranged at the front end of the low-pressure tapping port along the flowing direction of the fluid, so that the tip of the fluid blocking body points to the opposite direction of the flowing direction of the fluid.
The invention has the beneficial effects that:
(1) according to the plug-in anti-blocking wedge-shaped flowmeter which is assembled and disassembled without current interruption, the device is simple and ingenious in structure and scientific and reasonable in design according to the fluid mechanics principle, the blocking condition is effectively prevented in the using process, the accuracy and precision of the flowmeter detection are ensured, and the service life is obviously prolonged; the plug-in anti-blocking wedge-shaped flowmeter is convenient to use, install and operate, time-saving and labor-saving, can be installed and disassembled under the non-stop operation state, meets the production requirement of modern production non-stop maintenance, obviously reduces the production and maintenance cost, ensures the long-term effectiveness of the detection result, and has long service life.
(2) The non-stop flow mounting and dismounting method of the plug-in type anti-blocking wedge-shaped flowmeter is simple, time-saving and labor-saving, meets the requirement of non-stop flow in the mounting and dismounting processes of the flowmeter in the existing production process, obviously reduces the mounting and dismounting cost of the flowmeter, is particularly convenient for the regular detection and correction of the flowmeter in the production process, ensures the accuracy and precision of detection, obviously improves the working efficiency, meets the requirement of the modern production non-stop flow maintenance and correction, ensures the continuity of production, and has wide application range.
The non-stop flow installation method of the plug-in type anti-blocking wedge-shaped flowmeter realizes the non-stop flow installation of the flowmeter in the whole process, realizes the on-line non-stop flow installation, saves time and labor, obviously improves the installation efficiency and saves the installation cost, and meets the requirement of the non-stop flow installation in modern production. Meanwhile, the stable outflow coefficient, high repeatability of detection data results, high accuracy, difficult dirt accumulation and abrasion, long service life and obvious production and installation cost saving are ensured.
The plug-in type anti-blocking wedge-shaped flowmeter non-stop dismounting method can dismount the plug-in type anti-blocking wedge-shaped flowmeter non-stop according to actual requirements at any time in the using process, is time-saving and labor-saving, is low in maintenance and detection cost, facilitates regular detection and correction of the plug-in type anti-blocking wedge-shaped flowmeter in the production process, ensures the accuracy and precision of detection, obviously improves the working efficiency, meets the requirements of modern production non-stop flow maintenance and correction, and ensures the continuity of production.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of the structure of the measuring head of FIG. 1;
FIG. 3 is a schematic view of the construction of the flow meter lifting device of FIG. 1;
FIG. 4 is a schematic structural diagram of a non-stop installation and punching process device of the plug-in type anti-blocking wedge-shaped flowmeter.
The labels in the figure are: 1. the measuring device comprises a measuring head, 2 a gauge head, 3 an insertion pipe, 4 a measuring circular pipe, 5 a flow blocking body, 6 a high-pressure tapping pipe, 7 a low-pressure tapping pipe, 8 a high-pressure tapping port, 9 a low-pressure tapping port, 10 a second right-angle side, 11 a first right-angle side, 12 a first sealing valve, 13 a pipeline, 14 a first sealing flange fixing base, 15 a second sealing flange seat, 16 a flowmeter lifting base, 17 a lifting screw, 18 a screw lifting handrail, 19 a self-locking type fastening device, 20 pipeline special punching equipment and 21 an internal low-pressure tapping pipe.
Detailed Description
The invention is further described below in conjunction with the drawings and the specific embodiments to assist in understanding the contents of the invention. The method used in the invention is a conventional method if no special provisions are made; the raw materials and the apparatus used are, unless otherwise specified, conventional commercially available products.
As shown in fig. 1-3, the present invention provides an insertion type anti-blocking wedge-shaped flowmeter, which comprises a measuring head 1 and a meter head 2, wherein the meter head 2 comprises a pressure detection device and a display screen, and the pressure detection device is electrically connected with the display screen; the upper end of the measuring head 1 is connected with an inserting tube 3 and is connected with the gauge outfit 2 through the inserting tube 3, the measuring head 1 comprises a measuring circular tube 4 and a flow blocking body 5, the flow blocking body 5 is fixedly arranged inside the measuring circular tube 4, and the upper part of the flow blocking body 5 is of a circular arc structure which is matched with the inner side wall of the measuring circular tube 4 and is in seamless connection with the inner side wall; the top of the measuring circular tube 4 is also connected with two pressure tapping pipes, namely a high-pressure tapping pipe 6 and a low-pressure tapping pipe 7, and a corresponding high-pressure tapping port 8 and a corresponding low-pressure tapping port 9 are respectively arranged on the side walls of the measuring circular tube 4 at the front end and the rear end of the bluff body 5; the cross section of the bluff body 5 is a direct triangular cone structure, a first right-angle side 11 of the bluff body is in seamless connection with the inner side wall of the measuring circular tube 4, a second right-angle side 10 of the bluff body is vertically arranged downwards with the inner side wall of the measuring circular tube 4, and a low-pressure tapping pipe 21 which is attached to the second right-angle side 10 and arranged downwards is further connected to the low-pressure tapping port 9; the low pressure of the second right-angle side 10 of the rear end of the bluff body 5 is got and is pressed mouth 9 and be in vacuum state, can effectively measure the low pressure on the one hand and get and press mouth 9 department pressure, can prevent effectively moreover that it from being blockked up by the fluid, ensures to detect through the accuracy, effectively avoids the high pressure to get to press pipe 6 and low pressure to get to press pipe 7 and takes place to glue dirty condition and take place, makes the detection more permanent.
The length of the second right-angle side 10 of the bluff body 5 is greater than the radius of the measuring round pipe 4, the length of the internal low-pressure-leading pipe 9 is less than the radius of the measuring round pipe 4, the accuracy and precision of detection are further ensured, the low-pressure-leading pipe 7 can be effectively prevented from being stained, and the detection durability is ensured.
The upper parts of the high-pressure sampling pipe 6 and the low-pressure sampling pipe 7 are arranged in the inserting pipe 3 and are connected with a pressure detection device in the gauge outfit 2 at the top end of the inserting pipe 3, so that the real-time effective monitoring of fluid media in the pipeline is realized.
A first sealing valve 12 is mounted at the upper end of the insertion tube 3, and the first sealing valve 12 is a rotary ball valve; the first sealing valve 12 is fixed to a first sealing flange fixing base 14 welded to the pipe 13, and its upper end is pressed and fixed by a second sealing flange seat 15. The upper end of the second sealing flange seat 15 is connected with a flowmeter lifting device, the flowmeter lifting device comprises a flowmeter lifting base 16, a lifting screw 17 and a screw lifting handrail 18, the bottom of the flowmeter lifting base 16 is connected with a joint of the second sealing flange seat 15, the upper part of the flowmeter lifting base is connected with the screw lifting handrail 18, the lifting of the lifting screw 17 is adjusted by rotating the screw lifting handrail 18, the insertion pipe 3 is driven to lift, and the lifting of the measuring head 1 is finally controlled.
The top of lead screw lift handrail 18 is connected with gauge outfit 2, still is connected on the lifting screw 17 between flowmeter lift base 16 and the lead screw lift handrail 18 and is equipped with self-locking formula fastener 19, can select fastening and the pine from self-locking formula fastener 19 of relaxing at any time according to actual demand in the use, realizes being fixed in the regulation to lifting screw 17.
The measuring head 1 is made of stainless steel materials, is not easy to rust, keeps the firmness and durability of the whole device structure, is not easy to cause the phenomenon of fluid adhesion, and has long service life.
A non-stop mounting and dismounting method of a plug-in type anti-blocking wedge-shaped flowmeter,
the non-stop installation process of the plug-in anti-blocking wedge-shaped flowmeter comprises the following steps:
(1) point selection and fixation: firstly, welding a first sealing flange fixing base 14 of the plug-in type anti-blocking wedge-shaped flowmeter on a process pipeline 13, then connecting and fixing a first sealing valve 12 and the first sealing flange fixing base 14, compressing and fixing the upper end of the first sealing valve through a second sealing flange seat 15, and keeping the valve of the first sealing valve 12 in a closed state;
(2) punching: as shown in fig. 4, after the special pipe perforating equipment 20 is connected and fixed to the first sealing valve 12, the valve of the first sealing valve 12 is opened, the special pipe perforating equipment 20 is started to perform perforating operation on the process pipe 13, and after the perforating operation is completed, the valve of the first sealing valve 12 is closed, and then the special pipe perforating equipment 20 is removed;
(3) installation: after the flow meter lifting device is connected and fixed with the first sealing valve 12 through the second sealing flange seat 15, the valve of the first sealing valve 12 is opened, the lead screw lifting handrail 18 is rotated to adjust the lifting of the lifting screw 17, the lifting screw 17 is slowly screwed downwards to drive the insertion tube 3 to descend, and finally the measuring head 1 is controlled to descend and be installed into the process pipeline 13, and after the flow meter lifting device is rotated to the position and the direction of the measuring head 1 is adjusted: the central axis of a pressure measuring cavity in the measuring circular tube 4 is superposed with the central axis of the process pipeline 13, and a high-pressure tapping port 8 of the measuring circular tube 4 is arranged at the front end of a low-pressure tapping port 9 along the flowing direction of the fluid, so that the tip of a flow blocking body 5 points to the opposite direction of the flowing direction of the fluid; and then the self-locking fastening device 19 on the lifting screw 17 is fastened by bolts, so that the non-stop installation work of the flowmeter is completed.
When a fluid passes through the measuring head 1, a pressure difference is formed at the upstream and the downstream of the bluff body 5, the upstream (at a high-pressure taking port 8) of the tip of the bluff body 5 is PH, the downstream (at a low-pressure taking port 9) is PL, the differential pressure is △ P, △ P is PH-PL, the differential pressure is transmitted to a differential pressure transmitter of a pressure detection device in the gauge head 2 through the high-pressure taking pipe 6 and the low-pressure taking pipe 7, and the flow meter can accurately measure the flow rate of the fluid in a pipeline according to the Bernoulli theorem.
The non-stop flow installation method of the plug-in type anti-blocking wedge-shaped flowmeter realizes the non-stop flow installation of the flowmeter in the whole process, realizes the on-line non-stop flow installation, saves time and labor, obviously improves the installation efficiency and saves the installation cost, and meets the requirement of the non-stop flow installation in modern production. Meanwhile, the stable outflow coefficient, high repeatability of detection data results, high accuracy, difficult dirt accumulation and abrasion, long service life and obvious production and installation cost saving are ensured.
The plug-in type anti-blocking wedge-shaped flowmeter of the invention has the following non-stop disassembly process:
firstly, on the inserted anti-blocking wedge-shaped flowmeter which is installed in the step (3), the bolt of the self-locking fastening device 19 on the lifting screw 17 is appropriately unscrewed to ensure that the lifting screw 17 can rotate, then the screw lifting handrail 18 is reversely rotated to rotate the measuring head 1 to the topmost end, namely, higher than the first sealing valve 12, the valve of the first sealing valve 12 is closed, the fastening bolt of the second sealing flange seat 15 is loosened, namely, the non-stop disassembly work of the flowmeter is completed, in the using process, the non-stop disassembly of the inserted anti-blocking wedge-shaped flowmeter can be carried out at any time according to the actual requirements, the time and the labor are saved, the maintenance and the detection cost are low, the inserted anti-blocking wedge-shaped flowmeter is regularly detected and corrected in the production process, the detection accuracy and the precision are ensured, the working efficiency is obviously improved, and the requirements of the non-stop maintenance and the correction of the modern, ensuring the continuous production.
In conclusion, the plug-in anti-blocking wedge-shaped flowmeter which is disassembled and assembled without stopping flow has a simple and ingenious structure, effectively prevents the blockage in the using process, ensures the accuracy and precision of the flowmeter detection, and obviously prolongs the service life. The non-stop flow mounting and dismounting method of the plug-in type anti-blocking wedge-shaped flowmeter is simple, time-saving and labor-saving, meets the requirement of non-stop flow in the mounting and dismounting processes of the flowmeter in the existing production process, obviously reduces the mounting and dismounting cost of the flowmeter, is particularly convenient for the regular detection and correction of the flowmeter in the production process, ensures the accuracy and precision of detection, obviously improves the working efficiency, meets the requirement of the modern production non-stop flow maintenance and correction, ensures the continuity of production, and has wide application range.
The above is only an embodiment of the present invention, and for example, the first sealing valve 12 is a rotary ball valve or a flat gate valve, and the plug-in type anti-blocking wedge flow meter and the non-stop mounting and dismounting method thereof of the present invention can be realized.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "front", "rear", "inner", "outer", "middle", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
However, the above description is only exemplary of the present invention, and the scope of the present invention should not be limited thereby, and the replacement of the equivalent components or the equivalent changes and modifications made according to the protection scope of the present invention should be covered by the claims of the present invention.
Claims (10)
1. An insertion type anti-blocking wedge-shaped flowmeter comprises a measuring head and a meter head, wherein the meter head comprises a pressure detection device and a display screen, and the pressure detection device is electrically connected with the display screen; the upper end of the measuring head is connected with an insertion pipe and is connected with the gauge outfit through the insertion pipe, and the measuring head is characterized by comprising a measuring circular pipe and a flow blocking body, wherein the flow blocking body is fixedly arranged in the measuring circular pipe, and the upper part of the flow blocking body is of a circular arc structure which is matched with the inner side wall of the measuring circular pipe and is in seamless connection with the inner side wall of the measuring circular pipe; the top of the measuring circular tube is also connected with two pressure tapping pipes, namely a high-pressure tapping pipe and a low-pressure tapping pipe, and the corresponding high-pressure tapping port and the corresponding low-pressure tapping port are respectively arranged on the side walls of the measuring circular tube at the front end and the rear end of the bluff body; the cross section of the flow blocking body is of a direct triangular cone structure, a first right-angle edge of the flow blocking body is in seamless connection with the inner side wall of the measuring circular tube, a second right-angle edge of the flow blocking body is perpendicular to and downward arranged with the inner side wall of the measuring circular tube, and the low-pressure taking opening is further connected with an internal low-pressure leading tube which is attached to the second right-angle edge and downward arranged.
2. The plug-in type anti-blocking wedge flow meter according to claim 1, wherein the length of the second right-angle side of the flow blocking body is greater than the radius of the measuring circular tube, and the length of the internal low-pressure pipe is less than the radius of the measuring circular tube.
3. The plug-in type anti-blocking wedge flow meter according to claim 1, wherein the upper parts of the high pressure pipe and the low pressure pipe are both arranged in the insertion pipe and are connected with a pressure detection device in a meter head at the top end of the insertion pipe through the insertion pipe.
4. The plug-in type anti-blocking wedge flow meter according to claim 3, wherein the upper end of the plug-in pipe is provided with a first sealing valve, the first sealing valve is fixed on a first sealing flange fixing base welded with the pipeline, and the upper end of the first sealing valve is tightly pressed and fixed through a second sealing flange seat.
5. The plug-in type anti-blocking wedge-shaped flowmeter according to claim 4, wherein a flowmeter lifting device is connected to the upper end of the second sealing flange seat, the flowmeter lifting device comprises a flowmeter lifting base, a lifting screw rod and a screw rod lifting handrail, the bottom of the flowmeter lifting base is connected with the joint of the second sealing flange seat, the upper portion of the flowmeter lifting base is connected with the screw rod lifting handrail, the lifting screw rod is adjusted to lift by rotating the screw rod lifting handrail, the insertion tube is driven to lift, and the lifting of the measuring head is controlled finally.
6. The plug-in type anti-blocking wedge-shaped flowmeter according to claim 5, wherein the gauge outfit is connected above the screw lifting handrail, and a self-locking fastening device is further connected to the lifting screw rod between the flowmeter lifting base and the screw lifting handrail.
7. The plug-in anti-clogging wedge flow meter according to claim 5, wherein said first sealing valve is a rotary ball valve or a flat gate valve; the measuring head is made of stainless steel.
8. The non-stop mounting and dismounting method for the plug-in type anti-blocking wedge-shaped flowmeter according to any one of claims 1-7, characterized in that the specific mounting process is as follows:
(1) point selection and fixation: welding the first sealing flange fixing base of the plug-in anti-blocking wedge-shaped flowmeter on a process pipeline, then connecting and fixing the first sealing valve and the first sealing flange fixing base, compressing and fixing the upper end of the first sealing valve through the second sealing flange seat, and keeping the valve of the first sealing valve in a closed state;
(2) punching: after connecting and fixing the special pipeline punching equipment and the first sealing valve, opening the valve of the first sealing valve, starting the special pipeline punching equipment to punch on the process pipeline, and after the punching operation is finished, closing the valve of the first sealing valve, and then removing the special pipeline punching equipment;
(3) installation: after the flowmeter lifting device is connected and fixed with the first sealing valve through the second sealing flange seat, the valve of the first sealing valve is opened, the lead screw lifting handrail is rotated to adjust the lifting of the lifting screw rod, the lifting screw rod is slowly screwed downwards to drive the insertion pipe to descend, the measuring heads are finally controlled to descend and be installed into the process pipeline, after the measuring heads are rotated to the proper position and the directions of the measuring heads are adjusted, the self-locking fastening device on the lifting screw rod is fastened by bolts, and the non-stop installation work of the flowmeter is completed.
9. The method for installing and disassembling the plug-in type anti-blocking wedge-shaped flowmeter according to claim 8, characterized in that the specific disassembling process is as follows:
firstly, on the inserted anti-blocking wedge-shaped flowmeter which is installed in the step (3), the bolts of the self-locking fastening device on the lifting screw rod are appropriately unscrewed to ensure that the lifting screw rod can rotate, then the screw rod lifting handrail is reversely rotated to rotatably lift the measuring head to the topmost end, namely, the measuring head is higher than the first sealing valve, then the valve of the first sealing valve is closed, the fastening bolts of the second sealing flange seat are loosened, and the continuous-flow disassembly work of the flowmeter is completed.
10. The method for assembling and disassembling an inserted anti-blocking wedge flow meter according to claim 8, wherein in the step (3), the direction of the rotation-to-position adjusting measuring head is as follows: and arranging the central axis of the pressure measuring cavity inside the measuring circular tube and the central axis of the process pipeline in a superposition manner, and arranging the high-pressure tapping port of the measuring circular tube at the front end of the low-pressure tapping port along the flowing direction of the fluid so that the tip of the flow blocking body points to the opposite direction of the flowing direction of the fluid.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911165037.9A CN110987098A (en) | 2019-11-25 | 2019-11-25 | Plug-in type anti-blocking wedge-shaped flowmeter and non-stop mounting and dismounting method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111750936A (en) * | 2020-08-03 | 2020-10-09 | 淮安赛希尔自动化仪表有限公司 | Differential pressure flowmeter metering device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111750936A (en) * | 2020-08-03 | 2020-10-09 | 淮安赛希尔自动化仪表有限公司 | Differential pressure flowmeter metering device |
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