CN217236883U

CN217236883U - Rotatable orifice plate flowmeter of middle orifice plate

Info

Publication number: CN217236883U
Application number: CN202123137773.9U
Authority: CN
Inventors: 张斌; 马林; 王宇; 白志强
Original assignee: Henan Road And Mining Technology Co ltd
Current assignee: Henan Road And Mining Technology Co ltd
Priority date: 2021-12-13
Filing date: 2021-12-13
Publication date: 2022-08-19
Anticipated expiration: 2031-12-13

Abstract

The utility model relates to a colliery gas measurement field specifically is a rotatable orifice plate flowmeter of middle orifice plate, the mid-mounting including the fluid pipe has the long pivot of mountable orifice plate and internally mounted has the rotating base of rotatable short pivot, and the rotary disk is installed at the top of long pivot, and the tightening nut that is used for the location is installed near the bottom of rotary disk in long pivot surface. The orifice plate flowmeter with the rotatable middle orifice plate is characterized in that the orifice plate, the long rotating shaft/the short rotating shaft, the rotating base, the rotating disc, the screwing nut, the shaft sleeve and the O-shaped sealing ring are arranged in a matched mode, the device is mounted on a fluid pipe, the aperture of the orifice plate is smaller than the inner diameter of the fluid pipe, when fluid flows through the orifice plate, the cross section of a flow beam suddenly contracts, the flow speed is accelerated, the static pressure of the fluid at the rear end of the orifice plate is reduced, then, the static pressure difference is generated in the front and at the rear of the orifice plate, a determined numerical relation exists between the static pressure difference and the flow of the fluid, and the pressure difference in the front and at the rear of the orifice plate is measured by the U-shaped water column meter, so that the flow is measured.

Description

Rotatable orifice plate flowmeter of middle orifice plate

Technical Field

The utility model relates to a colliery gas measures technical field, specifically is a rotatable orifice plate flowmeter of middle orifice plate.

Background

In the process of gas extraction of a coal mine, firstly, a pore plate flowmeter is connected in parallel to a gas extraction pipeline, the concentration, negative pressure and pressure difference of gas in the gas extraction pipeline are measured by the pore plate flowmeter, and then the gas extraction quantity is calculated according to the parameters, so that the gas extraction quantity of a gas extraction point can be evaluated.

Chinese patent publication No. CN202582617U discloses a pressure nozzle of orifice plate flowmeter and an orifice plate flowmeter, belonging to the coal mine gas measurement technology, the pressure nozzle of orifice plate flowmeter comprises: the bottom surface of the main body is provided with a mounting connector which is used for being fixedly connected to a main measuring branch of the orifice plate flowmeter and used for communicating the main body with the main measuring branch, the main body is provided with a negative pressure meter port used for being connected with a negative pressure meter, the main body is also respectively provided with a differential pressure port used for being connected with one of two connectors of the differential pressure meter and a concentration port used for being connected with a gas concentration meter, the orifice plate flowmeter pressure nozzle can obtain three parameter values of negative pressure, concentration and differential pressure at one time, the measurement operation is simplified, and finally calculated gas extraction quantity can approach to a real value.

The orifice plate flowmeter who uses at present, the installation is more difficult when using to it is troublesome to measure, may influence the gas drainage effect, provides a rotatable orifice plate flowmeter of middle orifice plate for this reason.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Not enough to prior art, the utility model provides a rotatable orifice flowmeter of middle orifice plate has solved the problem of proposing among the above-mentioned background art.

(II) technical scheme

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: the utility model provides a rotatable orifice plate flowmeter of middle orifice plate, includes the rotating base of the long pivot of the mid-mounting of fluid pipe has the rotatable short pivot of mountable orifice plate and internally mounted, the rotary disk is installed at the top of long pivot, the bottom that long pivot surface is close to the rotary disk is installed and is used for the location screws up the nut, the inside wall of screwing up the nut is connected with the bottom can with the surface connection's of fluid pipe axle sleeve, the top of axle sleeve is connected with and is used for sealed O type sealing washer, the ring flange is all installed at the both ends of fluid pipe, the U type water column meter that the bottom mountable of fluid pipe is used for detecting, the surface mounting of fluid pipe has the copper joint of joinable.

Optionally, the surface of the long rotating shaft is in threaded connection with a connecting bolt for mounting the pore plate, so that the long rotating shaft can be connected with the pore plate through the connecting bolt.

Optionally, the top of the rotating base is connected to the bottom of the fluid pipe, and the top of the short rotating shaft may penetrate the surface of the fluid pipe.

Optionally, one side of the short rotating shaft may be connected to the bottom of the orifice plate through a connecting bolt, so that the orifice plate may rotate in the fluid pipe.

Optionally, the surface of the flange is provided with a mounting groove for mounting and connecting, and the orifice plate may be mounted inside the fluid pipe.

Alternatively, the bottom of the elongated rotating shaft may extend through the top of the fluid pipe and connect to the top of the orifice plate surface.

(III) advantageous effects

The utility model provides a rotatable orifice plate flowmeter of middle orifice plate possesses following beneficial effect:

1. this rotatable orifice plate flowmeter of middle orifice plate sets up through the cooperation between orifice plate, long pivot/short pivot, rotating base, rotary disk, the screw nut, axle sleeve and the O type sealing washer, installs the device on the fluid pipe, because the aperture of orifice plate is less than the fluid pipe internal diameter, when fluid flow through the orifice plate, the stream cross-section contracts suddenly, and the velocity of flow accelerates. The static pressure of the fluid at the rear end of the orifice plate is reduced, so that a static pressure difference is generated before and after the orifice plate, a determined numerical value relationship exists between the static pressure difference and the flow of the fluid, and the pressure difference before and after the orifice plate is measured by using a U-shaped water column meter, so that the flow is measured.

2. This rotatable orifice plate flowmeter of middle orifice plate, through the setting of orifice plate, the orifice plate is rotatable, and the device is the non-scale footpath apart from getting pressure flow measuring device, uses with U type water column meter is supporting, installs and manages to well in colliery gas drainage, survey gas flow, has rational in infrastructure, and measuring range is wide, easy maintenance, stable performance uses characteristics such as reliable to the resistance is little, does not influence the gas drainage effect.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the explosion structure at the short rotating shaft of the present invention;

FIG. 3 is a schematic view of the explosion structure at the long rotating shaft of the present invention;

fig. 4 is the structure schematic diagram of the tightening nut of the present invention.

In the figure: 1. a fluid pipe; 2. an orifice plate; 3. a long rotating shaft; 4. a short rotating shaft; 5. rotating the base; 6. rotating the disc; 7. screwing down the nut; 8. a shaft sleeve; 9. an O-shaped sealing ring; 10. a flange plate; 11. a U-shaped water column meter; 12. a copper joint; 13. a connecting bolt; 14. and (4) mounting the groove.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. 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 4, the present invention provides a technical solution: a rotatable orifice plate flowmeter of middle orifice plate, including the middle part of the fluid pipe 1 installs the long spindle 3 that can mount orifice plate 2 and internally installs the rotating base 5 of the rotatable short spindle 4, the bottom of the fluid pipe 1 can mount the U-type water column gauge 11 used for measuring, through the arrangement of orifice plate 2 and U-type water column gauge 11, the static pressure of the fluid of rear end of orifice plate 2 is reduced, so produce the static pressure difference before and after the orifice plate 2, there is definite numerical relation between flow rate of the fluid and the static pressure difference, measure the pressure difference before and after the orifice plate with the U-type water column gauge 11, thus realize the measurement to the flow;

the surface of the long rotating shaft 3 is in threaded connection with a connecting bolt 13 for mounting the pore plate 2, so that the long rotating shaft 3 can be connected with the pore plate 2 through the connecting bolt 13, the top of the short rotating shaft 4 can penetrate through the surface of the fluid pipe 1, one side of the short rotating shaft 4 can be connected with the bottom of the pore plate 2 through the connecting bolt 13, so that the pore plate 2 can rotate in the fluid pipe 1, the pore plate 2 can be mounted inside the fluid pipe 1, the long rotating shaft 3 and the short rotating shaft 4 are respectively attached to one side of the pore plate 2 through the arrangement of the connecting bolt 13, and the connecting bolt 13 is used for mounting;

the bottom of the long rotating shaft 3 can penetrate through the top of the fluid pipe 1 and is connected with the top of the surface of the pore plate 2, the rotating disc 6 is installed at the top of the long rotating shaft 3, the tightening nut 7 used for positioning is installed on the surface of the long rotating shaft 3 close to the bottom of the rotating disc 6, the inner side wall of the tightening nut 7 is connected with the shaft sleeve 8 of which the bottom can be connected with the surface of the fluid pipe 1, the top of the shaft sleeve 8 is connected with the O-shaped sealing ring 9 used for sealing, and the long rotating shaft 3, the tightening nut 7 and the shaft sleeve 8 can be sealed through the arrangement of the O-shaped sealing ring 9;

the two ends of the fluid pipe 1 are respectively provided with a flange plate 10, the surface of the fluid pipe 1 is provided with a connectable copper joint 12, the top of the rotating base 5 is connected with the bottom of the fluid pipe 1, and the surface of the flange plate 10 is provided with a mounting groove 14 for mounting connection.

The utility model discloses in, the device's working procedure as follows:

1. firstly, installing a pore plate 2 in the fluid pipe 1, and clamping the pore plate on the inner wall of the fluid pipe 1;

2. secondly, respectively attaching one side of the pore plate 2 by using the long rotating shaft 3 and the short rotating shaft 4, and installing by using a connecting bolt 13;

3. then, when the U-shaped water column meter 11 is installed, as the aperture of the pore plate 2 is smaller than the inner diameter of the fluid pipe 1, when the fluid flows through the pore plate 2, the flow beam section suddenly shrinks, and the flow speed is accelerated;

4. finally, the static pressure of the fluid at the rear end of the orifice plate 2 is reduced, so that a static pressure difference is generated before and after the orifice plate 2, a determined numerical relation exists between the static pressure difference and the flow rate of the fluid, and the pressure difference before and after the orifice plate is measured by using the U-shaped water column meter 11, so that the flow rate is measured.

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

1. The utility model provides a rotatable orifice plate flowmeter of middle orifice plate, includes that the mid-mounting of fluid pipe (1) has long pivot (3) of mountable orifice plate (2) and internally mounted has rotating base (5) of rotatable short pivot (4), its characterized in that: rotary disk (6) are installed at the top of long pivot (3), long pivot (3) surface is close to the bottom of rotary disk (6) and installs the nut of screwing up (7) that is used for the location, the inside wall of screwing up nut (7) is connected with bottom can with axle sleeve (8) of the surface connection of fluid pipe (1), the top of axle sleeve (8) is connected with O type sealing washer (9) that are used for sealing, ring flange (10) are all installed at the both ends of fluid pipe (1), the U type water column meter (11) that the bottom mountable of fluid pipe (1) is used for detecting, the surface mounting of fluid pipe (1) has the copper of joinable to connect (12).

2. The orifice plate rotatable flowmeter of claim 1, wherein: the surface of the long rotating shaft (3) is in threaded connection with a connecting bolt (13) for mounting the pore plate (2), so that the long rotating shaft (3) can be connected with the pore plate (2) through the connecting bolt (13).

3. The orifice plate rotatable flowmeter of claim 1, wherein: the top of the rotating base (5) is connected with the bottom of the fluid pipe (1), and the top of the short rotating shaft (4) can penetrate through the surface of the fluid pipe (1).

4. The orifice plate rotatable flowmeter of claim 2, wherein: one side of the short rotating shaft (4) can be connected with the bottom of the pore plate (2) through a connecting bolt (13), so that the pore plate (2) can rotate in the fluid pipe (1).

5. The rotatable intermediate orifice plate orifice flow meter of claim 1 in which: the surface of the flange plate (10) is provided with a mounting groove (14) for mounting and connecting, and the pore plate (2) can be mounted inside the fluid pipe (1).

6. The orifice plate rotatable flowmeter of claim 1, wherein: the bottom of the long rotating shaft (3) can penetrate through the top of the fluid pipe (1) and is connected with the top of the surface of the pore plate (2).