CN209130335U - Reducing flow universal joint - Google Patents

Abstract

The utility model discloses a universal adapter for reducing flow, which comprises a cylindrical cavity, wherein the center of one end of the cylindrical cavity is connected with a DN15 pipeline access device, the center of the other end of the cylindrical cavity is connected with a DN10 pipeline access device, and the centers of the outer circumferential side walls of the cylindrical cavity are respectively connected with DN8, DN6 and DN4 pipeline access devices; the DN15, DN10, DN8, DN6 and DN4 pipeline access devices are respectively used for being connected with DN15, DN10, DN8, DN6 and DN4 fluid medium flow pipelines. The novel variable-diameter flow universal joint has the advantages of simple structure, convenience in connection operation, small misjudgment rate of metering and verification results and the like, can be embedded into a liquid large-flow standard device, extends the measurement range of a large-flow device at small flow, improves the calibration accuracy of small flow and micro flow, can be conveniently connected with various pipelines and flowmeters for field detection/calibration, and greatly facilitates the implementation of field detection/calibration.

Description

A variable diameter flow universal joint

technical field

The utility model relates to the technical field of measurement and detection, in particular to a variable-diameter flow universal joint.

Background technique

In recent years, domestic provincial and municipal metrology technical institutions have paid great attention to the development of "large-caliber, large-flow" liquid flow calibration devices, while less attention has been paid to the research on small-flow and micro-flow metering, which makes the research and development of small-flow metering devices more difficult. weak. How to connect the measuring instrument to the detection device for detecting small and medium flow and small flow is a very important link. At present, the main problems are: the measurement range of domestic small-flow and micro-flow liquid flow devices is narrow, the number of pipelines is limited, and the accuracy of small-flow verification or calibration is also low.

The professional liquid flow standard devices of the metering system usually have a diameter of DN25mm or more, and the diameter of DN20mm and DN15mm is detected by changing the pipe (due to the small diameter of the pipe, it is not easy to lay a fixed pipeline), and the diameter below DN10mm has almost no ability to detect. Instruments such as flowmeters, especially those below DN15, have different calibers and various specifications. The preset pipes of the liquid flow device often cannot completely cover all the calibers of the instruments submitted for inspection. The connection of pipelines is also inconvenient, especially the flowmeters with diameters below DN25mm mostly use threaded joints, and the pipeline connections on the device are flanged connections. When flanged connections are used, the inner diameters of the flowmeter and the pipeline will not be concentric, and the flow will flow when the fluid flows. The field is distorted, which cannot correctly reflect the measurement performance of the flowmeter, resulting in misjudgment of the verification results.

Utility model content

In view of the defects existing in the background technology, the purpose of the present utility model is to provide a variable diameter flow universal joint, which is mainly used to connect pipes of different diameters in various calibration and detection environments during flow verification. , and then realize rapid pipe diameter reduction, which is suitable for on-site calibration of small liquid flow and embedded liquid flow standard device to improve the measurement and verification of small-diameter flowmeters.

In order to achieve the above purpose, the technical solution adopted by the present invention is as follows: a variable-diameter flow universal joint, which includes a cylindrical cavity, and a DN15 pipeline access device is connected to the center of one end of the cylindrical cavity. The center of the other end of the cylindrical cavity is connected with a DN10 pipeline access device, and the center of the outer circumferential side wall of the cylindrical cavity is respectively connected with DN8, DN6, DN4 pipeline access devices;

The DN15 pipeline access device is used to connect with the DN15 fluid medium flow pipeline;

The DN10 pipeline access device is used to connect with the DN10 fluid medium flow pipeline;

The DN8 pipeline access device is used to connect with the DN8 fluid medium flow pipeline;

The DN6 pipeline access device is used to connect with the DN6 fluid medium flow pipeline;

The DN4 pipeline access device is used to connect with the DN4 fluid medium flow pipeline.

Further, the DN15 pipeline access device includes a Φ15 straight pipe section and a flange, one end of the Φ15 straight pipe section is connected with the cylindrical cavity, and the other end is connected with the flange, the flange It is used to connect with DN15 fluid medium flow pipeline, and the lumen of the Φ15 straight pipe section communicates with the inner cavity of the cylindrical cavity.

Further, the DN10 pipeline access device includes a Φ10 straight pipe section and a first valve, one end of the Φ10 straight pipe section is connected with the cylindrical cavity, and the other end is connected with the first valve, and the first valve is used for It is connected with the DN10 fluid medium flow pipeline, and the lumen of the Φ10 straight pipe section communicates with the inner cavity of the cylindrical cavity.

Further, the DN8 pipeline access device includes a Φ8 straight pipe section and a second valve, one end of the Φ8 straight pipe section is connected with the cylindrical cavity, and the other end is connected with the second valve, and the second valve is used for In order to connect with the DN8 fluid medium flow pipeline, the lumen of the Φ8 straight pipe section communicates with the inner cavity of the cylindrical cavity.

Further, the DN6 pipeline access device includes a Φ6 straight pipe section and a third valve, one end of the Φ6 straight pipe section is connected with the cylindrical cavity, and the other end is connected with a third valve, and the third valve is used for Connected with the DN6 fluid medium flow pipeline, the lumen of the Φ6 straight pipe section communicates with the inner cavity of the cylindrical cavity.

Further, the DN4 pipeline access device includes a Φ4 straight pipe section and a fourth valve, one end of the Φ4 straight pipe section is connected with the cylindrical cavity, and the other end is connected with the fourth valve, and the fourth valve is used for In order to connect with the DN4 fluid medium flow pipeline, the lumen of the Φ4 straight pipe section communicates with the inner cavity of the cylindrical cavity.

Further, the first valve is a manual valve or an electric valve or a pneumatic valve or a hydraulic valve.

Further, the second valve is a manual valve or an electric valve or a pneumatic valve or a hydraulic valve.

Further, the third valve is a manual valve or an electric valve or a pneumatic valve or a hydraulic valve.

Further, the fourth valve is a manual valve or an electric valve or a pneumatic valve or a hydraulic valve.

The working principle of the variable diameter flow universal joint provided by the utility model is as follows:

First connect the DN15 pipeline access device of this variable diameter flow universal joint with the DN15 fluid medium flow pipeline, and then connect the DN10, DN8, DN6, DN4 pipelines of the variable diameter flow universal joint according to actual needs. The inlet device is respectively connected with the fluid medium flow pipelines of DN10, DN8, DN6 and DN4 that need to be measured and verified for small flow;

When measuring, keep the nozzle of the pipeline access device that needs to be transferred in an open state, and keep the nozzles of the other pipeline access devices in a closed state. The pipeline access device is kept open, and the remaining DN8, DN6 and DN4 pipeline access devices are kept closed, and at the same time, the valve of the pipe section perpendicular to the fluid flow direction is opened, so that the air in the pipe is discharged from the pipe section to ensure the pipe section. is in a state of full pipe flow.

Compared with the prior art, the beneficial effects of the present utility model are:

(1) It can realize the variable diameter connection of the liquid flow standard device with the diameter of DN15 to the fluid flow measuring instrument with the diameter of DN10 and below (such as: DN8, DN6 and DN4), so as to realize the measurement of the diameter of DN10 and below (such as: DN8) , DN6 and DN4) measurement and verification of small flow, micro flow liquid flow device;

(2) By adjusting and controlling the valve provided on the pipeline access device, the air in the corresponding pipe section can be exhausted as much as possible to ensure that the pipe section is always in a state of full pipe flow, thereby ensuring the correctness of the verification results;

(3) The structure is simple, the connection and operation are convenient, that is, it can be embedded in the liquid high-flow standard device, extend the measurement range of the large-flow device in the small flow, improve the calibration accuracy of small flow and small flow, and can be convenient for on-site detection// Calibration of various pipelines and flowmeter connections greatly facilitates the implementation of on-site testing/calibration.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the schematic diagram of the right side of Fig. 1;

In the figure: 1. Cylindrical cavity; 2. DN15 pipeline access device; 2a, Φ15 straight pipe section; 2b, flange plate; 3. DN10 pipeline access device; 3a, Φ10 straight pipe section; 3b, first Valve; 4, DN8 pipeline access device; 4a, Φ8 straight pipe section; 4b, the second valve; 5, DN6 pipeline access device; 5a, Φ6 straight pipe section; 5b, the third valve; 6, DN4 pipeline connection into the device; 6a, Φ4 straight pipe section; 6b, the fourth valve.

Detailed ways

In order to make it easy to understand the technical means, creative features, achievement goals and effects realized by the present invention, how to implement the present invention is further described below with reference to the accompanying drawings and specific embodiments.

1 and 2, a variable diameter flow universal joint provided by the present invention includes a cylindrical cavity 1, and a DN15 pipeline access device 2 is connected to the center of one end of the cylindrical cavity 1. A DN10 pipeline access device 3 is connected to the center of the other end of the cylindrical cavity 1, and a DN8, DN6, DN4 pipeline access device 4, 5, DN4 is connected to the center of the outer circumferential side wall of the cylindrical cavity 1, respectively. 6;

The DN15 pipeline access device 2 is used to connect with the DN15 fluid medium flow pipeline;

The DN10 pipeline access device 3 is used to connect with the DN10 fluid medium flow pipeline;

The DN8 pipeline access device 4 is used to connect with the DN8 fluid medium flow pipeline;

The DN6 pipeline access device 5 is used to connect with the DN6 fluid medium flow pipeline;

The DN4 pipeline access device 6 is used for docking with the DN4 fluid medium flow pipeline.

In the utility model, the DN15 pipeline access device 2 includes a Φ15 straight pipe section 2a and a flange 2b, one end of the Φ15 straight pipe section 2a is connected with the cylindrical cavity 1, and the other end is connected with the flange 2b. The blue plate 2b is used to connect with the DN15 fluid medium flow pipeline, and the lumen of the Φ15 straight pipe section 2a communicates with the inner cavity of the cylindrical cavity 1 .

In the present utility model, the DN10 pipeline access device 3 includes a Φ10 straight pipe section 3a and a first valve 3b, one end of the Φ10 straight pipe section 3a is connected with the cylindrical cavity 1, the other end is connected with the first valve 3b, and the first valve 3b is connected at the other end. A valve 3b is used to connect with a DN10 fluid medium flow pipeline, and the lumen of the Φ10 straight pipe section 3a communicates with the inner cavity of the cylindrical cavity 1 .

In the present utility model, the DN8 pipeline access device 4 includes a Φ8 straight pipe section 4a and a second valve 4b, one end of the Φ8 straight pipe section 4a is connected with the cylindrical cavity 1, and the other end is connected with the second valve 4b, The second valve 4b is used to connect with the DN8 fluid medium flow pipeline, and the lumen of the Φ8 straight pipe section 4a communicates with the inner cavity of the cylindrical cavity 1 .

In the present invention, the DN6 pipeline access device 5 includes a Φ6 straight pipe section 5a and a third valve 5b, one end of the Φ6 straight pipe section 5a is connected to the cylindrical cavity 1, the other end is connected to the third valve 5b, and the third The three valves 5b are used to connect with the DN6 fluid medium flow pipeline, and the lumen of the Φ6 straight pipe section 5a communicates with the inner cavity of the cylindrical cavity 1 .

In the utility model, the DN4 pipeline access device 6 includes a Φ4 straight pipe section 6a and a fourth valve 6b, one end of the Φ4 straight pipe section 6a is connected to the cylindrical cavity 1, the other end is connected to the fourth valve 6b, and the third The four valves 6b are used to connect with the DN4 fluid medium flow pipeline, and the lumen of the Φ4 straight pipe section 6a communicates with the inner cavity of the cylindrical cavity 1 .

Wherein, the first valve 3b, the second valve 4b, the third valve 5b and the fourth valve 6b can be any one of a manual valve, an electric valve, a pneumatic valve and a hydraulic valve.

The working principle of the variable diameter flow universal joint provided by the utility model is as follows:

First, connect the DN15 pipeline access device 2 of this variable-diameter flow universal joint to the DN15 fluid medium flow pipeline, and then connect the DN10, DN8, DN6, DN4 of the variable-diameter flow universal joint according to actual needs. The pipeline access devices 3, 4, 5, and 6 are respectively connected with the fluid medium flow pipelines of DN10, DN8, DN6 and DN4 that require small flow measurement and verification;

When measuring, keep the nozzle of the pipeline access device to be switched in an open state, and keep the nozzles of the remaining pipeline access devices in a closed state;

For example, when converting DN15 to DN10, keep the pipeline access devices 2 and 3 of DN15 and DN10 in an open state (passage state), and keep the remaining DN8, DN6 and DN4 pipeline access devices in a closed state (interrupted state). ), at the same time, open the first valve 3b on the straight pipe section 3a of Φ10, so that the air in the straight pipe section 3a of Φ10 is discharged from the pipe section, thereby ensuring that the straight pipe section 3a of Φ10 is in a state of full pipe flow.

For example, when converting DN15 to DN8, keep the pipeline access devices 2 and 4 of DN15 and DN8 in an open state (passage state), and keep the remaining DN10, DN6 and DN4 pipeline access devices in a closed state (off state) At the same time, open the second valve 4b connected to the straight pipe section 4a of Φ8, so that the air in the straight pipe section 4a of Φ8 is discharged from the pipe section, thereby ensuring that the straight pipe section 4a of Φ8 is in a state of full pipe flow.

When converting DN15 to DN6 or DN15 to DN4, you can follow the above steps in the same way.

Finally, the above description is only an embodiment of the present invention, and is not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and accompanying drawings of the present invention, or directly or indirectly Applications in other related technical fields are similarly included in the scope of patent protection of the present invention.

Claims (10)

1. A variable-diameter flow universal joint, characterized in that it comprises a cylindrical cavity (1), and a DN15 pipeline access device (2) is connected to the center of one end of the cylindrical cavity (1) , a DN10 pipeline access device (3) is connected to the center of the other end of the cylindrical cavity (1), and DN8, DN6, DN4 pipeline access device (4, 5, 6); The DN15 pipeline access device (2) is used to connect with the DN15 fluid medium flow pipeline; The DN10 pipeline access device (3) is used to connect with the DN10 fluid medium flow pipeline; The DN8 pipeline access device (4) is used to connect with the DN8 fluid medium flow pipeline; The DN6 pipeline access device (5) is used to connect with the DN6 fluid medium flow pipeline; The DN4 pipeline access device (6) is used for docking with the DN4 fluid medium flow pipeline. 2. The variable diameter flow universal joint according to claim 1, wherein the DN15 pipeline access device (2) comprises a Φ15 straight pipe section (2a) and a flange (2b) , one end of the Φ15 straight pipe section (2a) is connected with the cylindrical cavity (1), and the other end is connected with the flange (2b), which is used to connect with the DN15 fluid medium flow pipe The lumen of the Φ15 straight pipe section (2a) communicates with the inner lumen of the cylindrical cavity (1). 3. The variable-diameter flow universal joint according to claim 1, wherein the DN10 pipeline access device (3) comprises a Φ10 straight pipe section (3a) and a first valve (3b), One end of the Φ10 straight pipe section (3a) is connected with the cylindrical cavity (1), and the other end is connected with the first valve (3b), and the first valve (3b) is used for connecting with the DN10 fluid medium flow pipeline, so the The lumen of the Φ10 straight pipe section (3a) communicates with the inner lumen of the cylindrical cavity (1). 4. The variable-diameter flow universal joint according to claim 1, wherein the DN8 pipeline access device (4) comprises a Φ8 straight pipe section (4a) and a second valve (4b), One end of the Φ8 straight pipe section (4a) is connected with the cylindrical cavity (1), and the other end is connected with the second valve (4b), the second valve (4b) is used for connecting with the DN8 fluid medium flow pipeline, so The lumen of the Φ8 straight pipe section (4a) communicates with the inner lumen of the cylindrical cavity (1). 5. The variable diameter flow universal joint according to claim 1, characterized in that: the DN6 pipeline access device (5) comprises a Φ6 straight pipe section (5a) and a third valve (5b) , One end of the Φ6 straight pipe section (5a) is connected with the cylindrical cavity (1), and the other end is connected with the third valve (5b), which is used to connect with the DN6 fluid medium flow pipeline, The lumen of the Φ6 straight pipe section (5a) communicates with the inner lumen of the cylindrical cavity (1). 6. The variable-diameter flow universal joint according to claim 1, wherein the DN4 pipeline access device (6) comprises a Φ4 straight pipe section (6a) and a fourth valve (6b) , One end of the Φ4 straight pipe section (6a) is connected with the cylindrical cavity (1), and the other end is connected with the fourth valve (6b), which is used to connect with the DN4 fluid medium flow pipeline, The lumen of the Φ4 straight pipe section (6a) communicates with the inner lumen of the cylindrical cavity (1). 7 . The variable diameter flow universal joint according to claim 3 , wherein the first valve ( 3 b ) is a manual valve or an electric valve or a pneumatic valve or a hydraulic valve. 8 . 8 . The variable diameter flow universal joint according to claim 4 , wherein the second valve ( 4 b ) is a manual valve or an electric valve or a pneumatic valve or a hydraulic valve. 9 . 9 . The variable diameter flow universal joint according to claim 5 , wherein the third valve ( 5 b ) is a manual valve or an electric valve or a pneumatic valve or a hydraulic valve. 10 . 10 . The variable diameter flow universal joint according to claim 6 , wherein the fourth valve ( 6 b ) is a manual valve or an electric valve or a pneumatic valve or a hydraulic valve. 11 .