CN210293318U

CN210293318U - Differential pressure flowmeter convenient to installation

Info

Publication number: CN210293318U
Application number: CN201921411429.4U
Authority: CN
Inventors: 闵金卫; 刘炎光
Original assignee: Shanghai Zhangang Technology Group Jiangsu Co Ltd; Yichang Throttling Device Manufacturing Jiangsu Co Ltd
Current assignee: Shanghai Zhangang Technology Group Jiangsu Co Ltd; Yichang Throttling Device Manufacturing Jiangsu Co Ltd
Priority date: 2019-08-28
Filing date: 2019-08-28
Publication date: 2020-04-10
Anticipated expiration: 2029-08-28

Abstract

The utility model discloses a differential pressure flowmeter convenient to installation, survey buret, two including two flanged survey burets survey buret adjacent one end tip is pegged graft and is had stud, stud surface threaded connection has the nut, two it has the throttle plate to peg graft in the adjacent one side of survey buret, and throttle plate external fixed surface installs two seal ring, two survey buret top uses the throttle plate to weld as central symmetry has two to draw to press the pipe, and two draw to press the pipe and survey the inside intercommunication of buret, the central point that draws to press the pipe puts fixed mounting and has the stop valve. This differential pressure flowmeter convenient to installation through fixing the throttle plate in two survey adjacent departments of buret with stud, nut, can dismantle two survey burets, accomplishes the change to the throttle plate, cup joints the connector in the cardboard outside, and rotatable cardboard adjustment connector position rotates the connector and connects with the induced pressure pipe, simple structure, and convenient operation is convenient for install and the maintenance.

Description

Differential pressure flowmeter convenient to installation

Technical Field

The invention relates to the technical field of flow measurement, in particular to a differential pressure flowmeter convenient to install.

Background

The differential pressure flowmeter is based on the principle of fluid flow, and realizes flow measurement by utilizing pressure difference generated when fluid passes through a throttling device, is widely applied to industries such as petrochemical industry, food and beverage, pharmacy, energy and the like at present, is one of the most mature and commonly used methods for measuring flow in the current production, however, most of the existing differential pressure flowmeters cannot be conveniently installed and detached, and the maintenance or the replacement is inconvenient.

Disclosure of Invention

It is an object of the present invention to provide a differential pressure flowmeter that is easy to install to solve the problems set forth in the background art described above.

In order to achieve the purpose, the invention provides the following technical scheme: a differential pressure flowmeter convenient to install comprises two measuring pipes with flanges, two double-ended bolts are inserted into the end parts of the adjacent ends of the measuring pipes, nuts are connected to the outer surfaces of the double-ended bolts in a threaded manner, a throttle plate is inserted into the adjacent side of the two measuring pipes, two sealing washers are fixedly installed on the outer surface of the throttle plate, two pressure guiding pipes are welded on the top of the two measuring pipes in a symmetrical manner by taking the throttle plate as a center, the two pressure guiding pipes are communicated with the inside of the measuring pipes, a stop valve is fixedly installed at the central position of each pressure guiding pipe, a protective outer frame is sleeved outside each pressure guiding pipe, one end, far away from the measuring pipes, of each pressure guiding pipe is connected with a differential pressure transmitter in a threaded manner, the bottom of the differential pressure transmitter is fixedly installed with a, the connecting pipe outside cup joints and is connected with the connector, the cardboard is located the inside of connector, and the connector inner wall is close to the one end of bottom and is provided with the screw thread, the part that the pressure pipe is located the protection frame outside is provided with the screw thread section with connector looks adaptation.

Preferably, a sealing washer A is installed at the bottom of the connector, and a sealing washer B is installed at the bottom of the connecting pipe.

Preferably, the heating wire is evenly installed on the inner wall of the protection outer frame, a temperature sensor is installed on one side of the protection outer frame close to the surface of the bottom in a fixed mode, a temperature probe of the temperature sensor is located in the protection outer frame, and the sponge heat-insulating pipe is sleeved on the surface of the pressure leading pipe.

Preferably, the inner walls of the measuring pipe, the throttle plate, the pressure guiding pipe and the connecting pipe are all made of ceramic or quartz glass.

Preferably, a plurality of fluid through holes are uniformly formed in the throttle plate, the edges of the fluid through holes are smooth circular arcs, and the centers of the fluid through holes are conical.

Preferably, the inner diameter of the connector close to the top is slightly larger than the outer diameter of the pressure guiding pipe.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the differential pressure flowmeter convenient to install, the throttle plate is fixed at the adjacent position of the two measuring pipes through the stud bolts and the nuts, and after the fluid through hole is used for a long time, the cross section area of the fluid through hole is changed due to scouring of the inner wall of the fluid through hole in the flowing process of fluid, so that the measurement of the differential pressure flowmeter is influenced, the two measuring pipes can be detached at that time, and the throttle plate is replaced; through cup jointing the connector in the cardboard outside, rotatable cardboard adjustment connector position rotates the connector and is connected with the pressure pipe, simple structure, convenient operation, the installation and the maintenance of being convenient for.

2. This differential pressure flowmeter convenient to installation, edge through with the fluid through-hole sets up to arc, set up the center department of fluid through-hole into the circular cone, thereby strike the loss of fluid through-hole when can reduce fluid flow, during the use, the fluid gets into from the macrostoma of circular cone, flows out from the osculum of circular cone, can produce the impact to the inner wall in circular cone hole during fluid flow, can reduce and persist the scale deposit on the circular cone pore wall, the change of having avoided the fluid through-hole cross-sectional area and influenced the measurement accuracy of flowmeter, the life of throttle plate has been prolonged.

3. This differential pressure flowmeter convenient to installation, through the protecting sheathing who cup joints in the pressure pipe outside, install the heating wire on protecting sheathing's the inner wall, if the pressure pipe is in under microthermal state, can switch on the power of heating wire, make the heating wire heat protecting sheathing's inside, and the outside face cover of pressure pipe has connect one deck heat preservation sponge pipe, can keep warm to the pressure pipe after the heating wire heating, can avoid the pressure pipe to take place to freeze the phenomenon, the temperature sensor of externally mounted through protecting sheathing, and temperature sensor's temperature probe is located inside protecting sheathing, can monitor protecting sheathing inside temperature, make the temperature remain stable in the protecting sheathing.

4. This differential pressure flowmeter convenient to installation through at connecting pipe bottom installation seal ring A, at connector bottom installation seal ring B, can carry out double-deck sealed to the connecting pipe with the connection position of drawing the pressure pipe, avoids fluid to ooze from the junction, has improved measurement accuracy.

Drawings

FIG. 1 is a schematic view of the structure of the present invention.

Fig. 2 is a schematic view of the connection pipe of the present invention with the connection joint.

FIG. 3 is a schematic view of the connecting pipe of the present invention without the connecting head.

Fig. 4 is a schematic structural diagram of the pressure guiding tube of the present invention.

In the figure: the device comprises a measuring pipe 1, a throttle plate 2, a stud bolt 3, a nut 4, a pressure leading pipe 5, a differential pressure transmitter 6, a connecting pipe 7, a connector 8, a clamping plate 9, a sealing gasket B10, a sealing gasket A11, a thread section 12, a protective outer frame 13, a sponge heat-insulating pipe 14, a temperature sensor 15 and a stop valve 16.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-4, the present invention provides a technical solution: a differential pressure flowmeter convenient to install comprises two measuring tubes 1 with flanges, a stud bolt 3 is inserted at one end part adjacent to the two measuring tubes 1, a nut 4 is connected with the outer surface of the stud bolt 3 in a threaded manner, a throttle plate 2 is inserted at one side adjacent to the two measuring tubes 1, a plurality of fluid through holes are uniformly formed in the throttle plate 2, the edges of the fluid through holes are smooth circular arcs, the centers of the fluid through holes are all conical, two sealing gaskets are fixedly arranged on the outer surface of the throttle plate 2, the edges of the fluid through holes are arranged to be circular arcs, the centers of the fluid through holes are arranged to be conical, the loss of the fluid through holes caused by impacting the fluid through holes during fluid flowing can be reduced, when the differential pressure flowmeter is used, fluid enters from a large opening of a cone and flows out from a small opening of the cone, impact can be generated on the inner wall, the measuring precision of the flowmeter is prevented from being influenced by the change of the cross section area of the fluid through hole, and the service life of the throttle plate 2 is prolonged;

the top of the two measuring pipes 1 is symmetrically welded with two pressure guiding pipes 5 by taking the throttle plate 2 as a center, the two pressure guiding pipes 5 are communicated with the inside of the measuring pipe 1, a stop valve 16 is fixedly installed at the central position of the pressure guiding pipe 5, a protective outer frame 13 is sleeved outside the pressure guiding pipe 5, heating wires are evenly installed on the inner wall of the protective outer frame 13 and are electrically connected with an external power supply, a temperature sensor 15 is fixedly installed on the surface of one side of the protective outer frame 13 close to the bottom, a temperature probe of the temperature sensor 15 is positioned in the protective outer frame 13, a sponge heat-insulating pipe 14 is sleeved on the surface of the pressure guiding pipe 5, through the matching of the heating wires and the protective outer frame 13, if the pressure guiding pipe 2 is in a low-temperature state, the power supply of the heating wires can be switched on, so that the heating wires heat-insulating sponge pipe 14 is sleeved on the outer side of, the freezing phenomenon of the pressure guiding pipe 5 can be avoided;

one end of the pressure guiding pipe 5 far away from the measuring pipe 1 is connected with a differential pressure transmitter 6 by screw thread, the bottom of the differential pressure transmitter 6 is fixedly provided with a connecting pipe 7 with the same diameter as the pressure guiding pipe 5, and one end of the connecting pipe 7 close to the bottom is provided with a thread section, the thread section is connected with a clamping plate 9 in a threaded manner, the outside of the connecting pipe 7 is connected with a connecting head 8 in a sleeved manner, the clamping plate 9 is positioned inside the connecting head 8, the bottom of the connecting head 8 is provided with a sealing washer A11, the bottom of the connecting pipe 7 is provided with a sealing washer B10, and the sealing washer B11 is matched with the sealing washer A10, the double-layer sealing can be carried out on the connecting part of the connecting pipe 7 and the pressure guiding pipe 5, the fluid is prevented from seeping out from the connecting part, the measurement precision is improved, and the end of the inner wall of the connector 8 close to the bottom is provided with threads, and the part of the pressure guiding pipe 5 outside the protective outer frame 13 is provided with a thread section 12 matched with the connector 8.

The working principle is as follows: when a user installs the measuring tube, the two measuring tubes 1 can be placed at the same horizontal height, a certain gap is reserved between adjacent measuring tubes 1, the throttle plate 2 is placed in the gap between the two measuring tubes 1, the two measuring tubes 1 are connected through the stud bolts 3, and the two measuring tubes 1 are locked and fixed through the rotating nuts 4; then, the connecting pipe 7 is butted with the pressure leading pipe 5, the clamping plate 9 is rotated to a certain height along the thread on the pressure leading pipe 5, the connecting head 8 is rotated to be connected with the thread section 12 of the pressure leading pipe 5 outside the protective outer frame 13, so that the connecting pipe 7 is connected with the pressure leading pipe 5, and finally, one end of the measuring pipe 1 with the flange plate can be connected with an external pipeline.

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. A differential pressure flowmeter convenient to installation, includes two measuring burets (1) of taking the flange, its characterized in that: two the one end tip that survey buret (1) is adjacent is pegged graft and is had stud (3), stud (3) surface threaded connection has nut (4), two survey one side that buret (1) is adjacent is pegged graft and is had throttle plate (2), and throttle plate (2) surface fixed mounting has two seal ring, two survey buret (1) top and use throttle plate (2) to weld as central symmetry has two to draw and press pipe (5), and two draw and press pipe (5) and survey buret (1) inside intercommunication, the central point of drawing and pressing pipe (5) puts fixed mounting has stop valve (16), it has protection frame (13) to draw the outside of pressing pipe (5) to cup joint, the one end threaded connection who keeps away from surveying buret (1) of drawing pipe (5) has differential pressure transmitter (6), differential pressure transmitter (6) bottom fixed mounting has connecting pipe (7) the same with drawing pipe (5) pipe diameter, and connecting pipe (7) are provided with the screw thread section near the one end of bottom, threaded connection has cardboard (9) in the screw thread section, connecting pipe (7) outside cup joints and is connected with connector (8), cardboard (9) are located the inside of connector (8), and the one end that connector (8) inner wall is close to the bottom is provided with the screw thread, the partial screw thread section (12) that is provided with and connector (8) looks adaptation that the pressure pipe (5) are located protection frame (13) outside.

2. An easily installable differential pressure flowmeter as claimed in claim 1 wherein: seal ring A (11) is installed to connector (8) bottom, seal ring B (10) is installed to connecting pipe (7) bottom.

3. An easily installable differential pressure flowmeter as claimed in claim 1 wherein: evenly install the heating wire on protection frame (13) inner wall, the fixed surface that one side of protection frame (13) is close to the bottom installs temperature sensor (15), and the temperature probe of temperature sensor (15) is located protection frame (13), sponge insulating tube (14) have been cup jointed on pressure pipe (5) surface to the pressure.

4. An easily installable differential pressure flowmeter as claimed in claim 1 wherein: the inner walls of the measuring pipe (1), the throttle plate (2), the pressure guiding pipe (5) and the connecting pipe (7) are made of ceramic or quartz glass.

5. An easily installable differential pressure flowmeter as claimed in claim 1 wherein: a plurality of fluid through holes are uniformly formed in the throttle plate (2), the edges of the fluid through holes are smooth circular arcs, and the centers of the fluid through holes are conical.

6. An easily installable differential pressure flowmeter as claimed in claim 1 wherein: the inner diameter of the connector (8) close to the top is slightly larger than the outer diameter of the pressure guiding pipe (5).