CN210411800U - Dredging device for pressure guide pipe of orifice plate flowmeter - Google Patents

Abstract

The utility model discloses a diaphragm flowmeter impulse pipe pull throughs, including sealed chamber assembly, dredging pipe passes sealed chamber assembly to dredging pipe is connected for sliding seal with sealed chamber assembly, the screw thread that is used for connecting the ball valve on the diaphragm flowmeter impulse pipe way is offered to port before the sealed chamber assembly. The rear end opening of the dredging pipe is connected with an inlet of the dirt collecting cavity, and the front end opening of the dredging pipe is designed to be in a groove shape. The dredging pipe is provided with a pressure gauge and a drain valve, and the drain valve is positioned behind the pressure gauge. An outlet is formed in the bottom of the dirt collecting cavity, an outlet valve of the collecting cavity is installed at the outlet, and the inner portion of the dirt collecting cavity is designed into a labyrinth channel or a snake-shaped channel. The utility model discloses can realize that the flowmeter does not stop to dredge and block up the pipeline to the plug of safe discharge realizes flowmeter normal operating, reduces worker intensity of labour.

Description

Dredging device for pressure guide pipe of orifice plate flowmeter

Technical Field

The utility model belongs to the technical field of the accessory technique of oil industry orifice plate flowmeter and specifically relates to an orifice plate flowmeter connecting pipe pull throughs.

Background

The orifice plate flowmeter is a flow metering device commonly used in petroleum industry production, and based on the throttling principle of an orifice plate to fluid, the orifice plate flowmeter realizes flow metering by utilizing pressure difference generated when the fluid passes through the orifice plate. The orifice plate flowmeter has simple structure, stability and reliability, and is widely applied to the natural gas metering work of the gas collecting and distributing station of the oil and gas field. Contain impurity such as a large amount of solid suspended particles, greasy dirt condensate and H2S in the natural gas under present site environment, after natural gas passes through the orifice plate throttle, receive the change influence of pressure and temperature, can form loose sulphide impurity in the pipeline, pile up the caking for a long time and can lead to leading between orifice plate flowmeter and the differential pressure transmitter to press the pipeline to take place blocking phenomenon, cause flowmeter data distortion, measure and appear the deviation. In order to ensure the accuracy of metering, the on-duty workers need to carry out encryption inspection and frequent pollution discharge, and when problems occur, the problems are reported in time and stopped to be processed, so that the labor intensity of the workers is increased; and because there is not dedicated dredging tool, the flowmeter still has the residual pressure in the local jam section after stopping transporting and emptying, and there is certain potential safety hazard in the mediation process, in order to change above-mentioned current situation, the scene needs a pressure pipeline pull throughs, realizes the safe effectual mediation work of accomplishing of not stopping transporting.

Patent retrieval situation: patent retrieval: the search keywords of orifice flowmeter impulse pipe, dredging device and orifice dredging do not search out corresponding patents in the patent search of the national intellectual property bureau.

And (3) searching papers: a search keyword "orifice plate flowmeter impulse piping", non-patent document 3, respectively, "installation and maintenance of differential pressure flowmeter impulse piping" in (1) scientific and technical information, 26 th year 2012; (2) "standard orifice flowmeter measurement refinery gas error analysis" from Guangdong chemical engineering, stage 12 of 2012; (3) petroleum industry technical supervision 2009, "on-site analysis of metering error of orifice plate flowmeter"; the above paper is comprehensively analyzed from the installation and maintenance of the pipeline, and only the design of the sewage discharge period and the flow bypass is discussed in the measure, and there is no difference from the device of the above patent application. The search keyword 'pressure guide pipe, pressure guide pipe dredging' does not find the relevant content thesis.

The prior art has the following defects: the natural gas under the field environment contains a large amount of solid suspended particles, oil condensate, H2S and other impurities, and after the natural gas is throttled by the orifice plate, the natural gas is influenced by changes of pressure and temperature, liquid drops in the gas, pipelines and solid particles in the gas can form a small amount of loose sulfide impurities in the pipelines, and long-time accumulation can cause the pressure guide pipeline between the orifice plate flowmeter and the differential pressure transmitter to be blocked, so that the data of the flowmeter is distorted, and the metering deviation occurs.

Application No.: 201220585247.0 relates to a pressure tapping hole dredging structure of a pore plate flowmeter. The pressure tapping hole pressure tapping device comprises flange plates, a differential pressure pipeline, a pressure tapping hole parallel section and a pressure tapping hole vertical section, and is characterized in that penetrating threaded holes which are vertically downward and concentric with the pressure tapping hole vertical section are drilled at the top ends of the two flange plates at the upper and lower positions respectively, the bottom ends of the two threaded holes are located above a pressure tapping hole blind hole, and sealing bolts are assembled in the threaded holes. When the pressure taking hole is blocked, the bolt is unscrewed, the pressure taking hole parallel section parallel to the gas pipeline can be dredged by using a tool from the inner side of the flange plate, the pressure taking hole vertical section vertical to the gas pipeline can be dredged downwards along the threaded hole from the top end of the flange plate, and the pressure taking hole is fastened and sealed by using the bolt after the dredging. The utility model has the advantages that: simple structure dredges fast under the condition that does not influence production, and easy maintenance is swift, is convenient for maintain and maintains.

Application No.: 201110208857.9A method for dredging the flow orifice pipe of coke oven gas comprises adding purge valve and short pipe to the flow orifice plate, which is to reflect the flow to the flowmeter through the pressure difference between the positive and negative pipes, adding gate valve as purge valve and short pipe as connector to the hose, and introducing steam with temperature above 250 deg.C into the flow orifice plate pipe at 1.8MPa for 30 min. The invention can discharge the crystallized and melted naphthalene residue in the flow guide pipe along with the steam condensate water, prevent the flow guide pipe from being blocked and avoid influencing the production of users.

Application No.: 201120080384.4A pressure tapping anti-blocking device of orifice plate flowmeter is arranged on the medium pipeline of orifice plate flowmeter; the device comprises two fixed sleeves and pressure taking ports, wherein the two fixed sleeves are respectively arranged at two sides of a medium pipeline pore plate of the flowmeter; the two ejector rods are respectively inserted into the two fixed sleeves and are sealed by the sealing rings; and the two pressure taking pipes are respectively arranged on the side walls of the lower parts of the two fixed sleeves and communicated with the fixed sleeves, and the two pressure taking pipes are respectively connected with the orifice plate type flowmeter differential pressure transmitter. The utility model discloses change the state that originally got the unable online clearance of pressure port, can carry out online clearance at any time, ensure flowmeter operational reliability.

Application No.: 201621254107.X relates to a block cleaning device for flow orifice plate, which comprises a block cleaning rod, an intermediate joint, a connecting and fixing cylinder, a plastic sealing washer, and a leakage-proof plate, wherein the intermediate joint is fixed in the connecting and fixing cylinder, the block cleaning rod is inserted into the intermediate joint and the connecting and fixing cylinder, and the end of the block cleaning rod is vertically and fixedly connected with a handle. The flow meter has the advantages that the fault and labor cost can be reduced, resources are utilized to the maximum extent, the flow orifice plate and the pressure tapping pipeline joint cannot be cleaned in the production process, particularly, the blockage impurity caking and the sticking are avoided, and the flow meter is accurate and reliable in detection and convenient to overhaul and maintain.

Technical scheme and the technical problem that will solve and the beneficial effect who produces of above disclosure technique all with the utility model discloses inequality, to the utility model discloses more technical characteristics and the technical problem and the beneficial effect that will solve all do not have the technological inspiration in the above technical document that discloses.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a orifice plate flowmeter connecting pipe pull throughs can realize that the flowmeter does not shut down the mediation and blocks up the pipeline to the plug of discharging safely realizes flowmeter normal operating, reduces worker intensity of labour.

In order to achieve the above object, the present invention adopts the following technical solution, a pressure guiding pipe dredging device for a orifice plate flowmeter, comprising a sealing cavity assembly and a dredging pipe, wherein the dredging pipe passes through the sealing cavity assembly, the dredging pipe is connected with the sealing cavity assembly in a sliding sealing manner, and a front end of the sealing cavity assembly is provided with a threaded screw thread for connecting a ball valve on a pressure guiding pipe of the orifice plate flowmeter.

The rear end opening of the dredging pipe is connected with an inlet of the dirt collecting cavity, and the front end opening of the dredging pipe is designed to be in a groove shape.

The dredging pipe is provided with a pressure gauge and a drain valve, and the drain valve is positioned behind the pressure gauge.

An outlet is formed in the bottom of the dirt collecting cavity, an outlet valve of the collecting cavity is installed at the outlet, and the inner portion of the dirt collecting cavity is designed into a labyrinth channel or a snake-shaped channel.

The seal cavity assembly comprises a seal cavity and a seal gland, the seal cavity is provided with a front port and a rear port, the rear port is in thread connection with the seal gland, a seal ring is arranged on the inner wall of the seal gland, and the inner wall of the seal gland and the outer wall of the dredging pipe are in sliding seal.

Compared with the prior art, the utility model following beneficial effect has:

the utility model discloses pressure pipe pull throughs leads the ball valve on the pressure pipeline through sealed chamber assembly and orifice flowmeter and is connected, to dredge the pipe and insert sealed intracavity, screw up sealing gland, open and lead pressure pipeline ball valve, dredge the pipe and insert and lead the pressure pipeline and carry out back-and-forth movement mediation work, when the manometer shows normal pressure, prove that to lead pressure pipeline mediation and accomplish, frequently quick-opening quick-closing blowoff valve, utilize the flowmeter internal pressure to discharge filth impurity, the labyrinth that collects the intracavity through the filth carries out safe collection, accomplish mediation work, the device is pulled down to the order, install the pipeline and normally produce. The flowmeter is operated without stopping, the safety operation of workers is ensured, and the labor intensity of the workers is reduced.

The pressure guide pipe dredging device is used for dredging a pipe, and the front end of the pressure guide pipe dredging device is subjected to groove treatment, so that the pipeline is conveniently dredged; on the dredging pipe of the pressure guide pipe dredging device, pressure display is designed, and the safe operation of the pressure display is ensured. The sewage collecting cavity of the pressure guide pipe dredging device is designed with a labyrinth device, thereby avoiding pollution and personal injury and facilitating the collection of discharged materials.

Drawings

Fig. 1 is a schematic structural view of a pressure pipe dredging device of an orifice plate flowmeter of the present invention;

FIG. 2 is a cross-sectional view of a capsule assembly connection configuration.

In the figure: the device comprises a sealed cavity assembly 1, a dredging pipe 2, a pressure gauge 3, a blow-down valve 4, a dirt collecting cavity 5, a collecting cavity outlet valve 6 and a ball valve 7 on a pressure guide pipeline of an orifice plate flowmeter;

a sealing cavity 11, a sealing gland 12 and a sealing ring 13.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 to 2, the present invention provides a technical solution:

the utility model provides a diaphragm flowmeter impulse pipe pull throughs, includes sealed chamber assembly 1, dredge pipe 2, dredge the pipe and pass sealed chamber assembly to dredge the pipe and be the sliding seal connection with sealed chamber assembly, the screw thread that is used for connecting ball valve 7 on the diaphragm flowmeter impulse pipe way is offered to sealed chamber assembly front end mouth.

The rear end opening of the dredging pipe is connected with an inlet of the sewage collecting cavity 5, and the front end opening of the dredging pipe is designed into a groove shape.

The dredging pipe is provided with a pressure gauge 3 and a blow-down valve 4, and the blow-down valve is positioned behind the pressure gauge.

An outlet is formed in the bottom of the dirt collecting cavity, an outlet valve 6 of the collecting cavity is installed at the outlet, and the inner portion of the dirt collecting cavity is designed into a labyrinth channel or a snake-shaped channel.

The seal cavity assembly comprises a seal cavity 11 and a seal gland 12, the seal cavity is provided with a front port and a rear port, the seal gland is connected with the rear port through a thread buckle, a seal ring 13 is installed on the inner wall of the seal gland, and the inner wall of the seal gland and the outer wall of the dredging pipe are in sliding seal. The sealed chamber can also play the effect of the temporary storage filth except the sealing effect, and the temporary storage filth finally enters the dredging pipe and is discharged to the filth collecting chamber 5.

The pressure guide pipe dredging device consists of a sealing cavity assembly 1, a dredging pipe 2, a pressure gauge 3, a blow-off valve 4 and a dirt collecting cavity 5. The sealing cavity assembly 1 is connected with a ball valve screw thread on a pressure guide pipe of the orifice plate flowmeter, the dredging pipe 2 enters the pressure guide pipeline through the sealing cavity and the pressure guide pipe ball valve to conduct dredging work, and the pressure gauge 3 is connected with the dredging pipe 2 to display the pipeline state; the tail part of the drain valve 4 and the dredging pipe 2 is connected by screw threads, and the sewage collecting cavity 5 is arranged on the drain valve 4.

The utility model is suitable for a natural gas distribution station defeated pipeline of pipe especially is applicable to orifice plate flowmeter and all kinds of differential pressure transmitter have ball valve control lead the mediation work of pressing the pipeline.

In the description of the present invention, it should be understood that the orientation indication or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description of the present invention, and does not indicate or imply that the device or element 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.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. The utility model provides a perforated plate flowmeter impulse pipe pull throughs, includes sealed chamber assembly, dredge pipe passes sealed chamber assembly to dredge pipe and sealed chamber assembly are sliding seal to be connected, sealed chamber assembly front end mouth is seted up and is used for connecting the screw thread of the ball valve on the perforated plate flowmeter impulse pipe way.

2. The pressure pipe dredging device for the orifice plate flowmeter as claimed in claim 1, wherein the rear port of the dredging pipe is connected with the inlet of the dirt collecting cavity, and the front port of the dredging pipe is designed to be in a groove shape.

3. The dredging device for the pressure guiding pipe of the orifice plate flowmeter as claimed in claim 2, wherein the dredging pipe is provided with a pressure gauge and a drain valve, and the drain valve is positioned behind the pressure gauge.

4. The orifice plate flowmeter impulse pipe dredging device of claim 2 or 3, wherein an outlet is arranged at the bottom of the dirt collection cavity, an outlet valve of the collection cavity is arranged at the outlet, and the inside of the dirt collection cavity is designed into a labyrinth channel or a snake-shaped channel.

5. The orifice plate flowmeter impulse pipe pull throughs of claim 2 or 3, wherein the seal chamber assembly comprises a seal chamber, a seal gland, the seal chamber has a front port and a rear port, wherein the rear port is in thread-lock connection with the seal gland, a seal ring is installed on the inner wall of the seal gland, and the inner wall of the seal gland and the outer wall of the pull through pipe are in sliding seal.

Images