CN210890263U

CN210890263U - Pipeline pressure difference device

Info

Publication number: CN210890263U
Application number: CN201921267125.5U
Authority: CN
Inventors: 卢贞琦; 于勤学
Original assignee: Shenyang Hongqi Thermal Equipment Manufacturing Co ltd
Current assignee: Shenyang Hongqi Thermal Equipment Manufacturing Co ltd
Priority date: 2019-08-07
Filing date: 2019-08-07
Publication date: 2020-06-30
Anticipated expiration: 2029-08-07

Abstract

The utility model relates to a pipeline pressure difference device, which is provided with a cylinder body; the upper end of the cylinder body is fixedly connected with an upper cover, and the lower end of the cylinder body is fixedly connected with a lower cover; a backwater inlet pipe is connected to the side wall of the middle part of the cylinder body, and a backwater outlet pipe is welded in a penetrating way; a corrugated pipe is accommodated above the inner part of the cylinder body; the upper end of the upper corrugated pipe is welded with the upper cover, and the lower end of the upper corrugated pipe is welded with the upper corrugated pipe movable plate; the upper corrugated pipe movable plate is fixedly connected with the top end of the central core; a central seat fixedly connected with a backwater outlet pipe is arranged in the middle of the cylinder body, and a central core is in through connection with the central seat; a lower corrugated pipe fixing plate is fixedly connected to the middle part in the cylinder body, and a movable sealing ring is arranged at the center of the fixing plate; the lower corrugated pipe fixing plate is welded with the lower corrugated pipe, and the lower corrugated pipe is welded with the lower corrugated pipe movable plate; the lower part in the cylinder body is provided with a differential pressure corrugated pipe welded with the lower cover, and the upper end of the differential pressure corrugated pipe is welded with a movable plate of the differential pressure corrugated pipe; the differential bellows movable plate is abutted with the central core. The novel pressure difference is related to the inflation pressure, is preset and does not need to be adjusted frequently.

Description

Pipeline pressure difference device

Technical Field

The utility model belongs to the technical field of relate to the pipeline, a pipeline differential pressure ware specifically says so.

Background

The heating terminal is a user, the heat quantity used by the user is not determined by the inlet pressure, but is determined by the pressure difference between the inlet pressure and the return pressure of the user, in the past, in order to obtain reasonable pressure difference, a heating enterprise generally selects and adopts valve opening degree adjustment, at present, a self-operated balance valve is used more advanced, the adjustment is also troublesome, and once the flow and the pressure of one branch or the user are changed, the whole heating network is influenced. And the error is large. The two adjusting methods all need the fixed user quantity of each branch, and the user can adjust the branch only after the heating begins due to the continuous change every year, so that the workload is large. The adjustment cost is high by using the electric regulating valve, and electric energy is needed.

SUMMERY OF THE UTILITY MODEL

The utility model relates to a special pipeline differential pressure ware for pipeline pressure, flow adjustment.

The utility model aims at realizing through the following technical scheme:

a pipeline pressure difference device is provided with a cylinder body; the upper end of the cylinder body is fixedly connected with an upper cover, and the lower end of the cylinder body is fixedly connected with a lower cover; a backwater inlet pipe is connected to the side wall of the middle part of the cylinder body, and a backwater outlet pipe is welded in a penetrating way; an upper corrugated pipe is accommodated above the inner part of the cylinder body; the upper end of the upper corrugated pipe is welded with the upper cover, and the lower end of the upper corrugated pipe is welded with the upper corrugated pipe movable plate; the upper corrugated pipe movable plate is fixedly connected with the top end of the central core; a central seat fixedly connected with a backwater outlet pipe is arranged in the middle of the cylinder body, and a central core is in through connection with the central seat; a lower corrugated pipe fixing plate is fixedly connected to the middle part in the cylinder body, and a movable sealing ring is arranged at the center of the fixing plate; the lower corrugated pipe fixing plate is welded with the lower corrugated pipe, and the lower corrugated pipe is welded with the lower corrugated pipe movable plate; the lower part in the cylinder body is provided with a differential pressure corrugated pipe welded with the lower cover, and the upper end of the differential pressure corrugated pipe is welded with a movable plate of the differential pressure corrugated pipe; the differential bellows movable plate is abutted with the central core.

Two funnel-shaped sealing valves are arranged on the outer side of the central core, and when the central core moves upwards, the sealing valves are far away from the central seat and are gradually opened to increase the flow of the backwater outlet pipe; when the central core moves downwards, the sealing valve is close to the central seat and gradually seals, and the flow of the backwater outlet pipe is reduced.

A backwater feedback pipe is arranged on the backwater inlet pipe, and the free end of the backwater feedback pipe is arranged in the inner cavity of the lower corrugated pipe.

The upper cover is provided with a water inlet feedback pipe which is communicated into the upper corrugated pipe.

The lower cover is provided with a differential pressure corrugated pipe inflation pipe which is communicated with the inner cavity of the differential pressure corrugated pipe.

The diameters of the upper corrugated pipe, the lower corrugated pipe and the differential pressure corrugated pipe are the same, and the drift diameters of the three corrugated pipes are more than twice of the diameters of the backwater inlet pipe and the backwater outlet pipe.

The utility model has the advantages that:

1. the utility model discloses a pressure differential is invariable, and is irrelevant with inlet pressure, user's volume, each branch road change.

2. The utility model discloses favorable operating position is arranged in to the gas tube, and the differential pressure gauge body can bury underground entirely.

3. The utility model discloses pressure differential is relevant with inflation pressure, and is irrelevant with other parameters, can preset, need not the frequent adjustment of electric power.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings 1 and 2.

A pipeline differential pressure device comprises a cylinder body 2;

the upper end of the cylinder body 2 is fixedly connected with an upper cover 1, and the lower end is fixedly connected with a lower cover 17;

a backwater inlet pipe 5 is connected to the side wall of the middle part of the cylinder body 2, and a backwater outlet pipe 12 is welded in a penetrating way;

an upper corrugated pipe 3 is accommodated above the inner part of the cylinder body 2;

the upper end of the upper corrugated pipe 3 is welded with the upper cover 1, and the lower end of the upper corrugated pipe 3 is welded with the upper corrugated pipe movable plate 4; the upper bellows movable plate 4 is fixedly connected with the top end of the central core 11;

a central seat 6 fixedly connected with a backwater outlet pipe 12 is arranged at the middle part in the cylinder body 2, and a central core 11 is in through connection with the central seat 6;

a lower corrugated pipe fixing plate 15 is fixedly connected to the middle part in the cylinder body 2, and a movable sealing ring 16 is arranged at the center of the fixing plate 15; the lower corrugated pipe fixing plate 15 is welded with the lower corrugated pipe 14, and the lower corrugated pipe 14 is welded with the lower corrugated pipe movable plate 13;

the inner lower part of the cylinder body 2 is provided with a differential pressure corrugated pipe 9 welded with a lower cover 17, and the upper end of the differential pressure corrugated pipe 9 is welded with a differential pressure corrugated pipe movable plate 8; the differential bellows movable plate 8 abuts against the center core 11.

Two funnel-shaped sealing valves are arranged on the outer side of the central core 11, and when the central core 11 moves upwards, the sealing valves are far away from the central seat 6 and are gradually opened, so that the flow of the backwater outlet pipe 12 is increased; when the central core 11 moves downwards, the sealing valve is close to the central seat 6 and gradually seals, and the flow of the backwater outlet pipe 12 is reduced.

A backwater feedback pipe 7 is arranged on the backwater inlet pipe 5, and the free end of the backwater feedback pipe 7 is arranged in the inner cavity of the lower corrugated pipe 14.

The upper cover 1 is provided with a water inlet feedback pipe 10 which is communicated into the upper corrugated pipe 3, and the water inlet feedback pipe 10 is connected with a water inlet pipe of a heat supply network pipeline.

The lower cover 17 is provided with a differential pressure corrugated pipe inflation pipe 18 which is communicated with the inner cavity of the differential pressure corrugated pipe 9.

The diameters of the upper corrugated pipe 3, the lower corrugated pipe 14 and the differential pressure corrugated pipe 9 are the same, and the drift diameters of the three corrugated pipes are more than twice of the diameters of the return water inlet pipe 5 and the return water outlet pipe 12.

Principle of operation

Air is filled into the inner cavity of the differential pressure corrugated pipe 9 through the differential pressure corrugated pipe air filling pipe 18, the upper end of the differential pressure corrugated pipe moves upwards under the action of air pressure, the differential pressure corrugated pipe movable plate 8 is in contact with the central core to drive the central core to move upwards, the opening degree of the differential pressure device is the largest, and when the differential pressure corrugated pipe works, fluid enters the water inlet pipe and respectively enters the inner cavities of the upper corrugated pipe and the lower corrugated pipe of the differential pressure device through the water inlet feedback pipe 10 and the water return feedback pipe 7. Simultaneously the fluid flows to the export through two sections openings of center seat, and pressure P1 of intaking, the pressure of returning the mouth is P2, and the inflation pressure is P3, and outlet pressure P4 is disregarded two bellows deformation rigidity power and center seat both ends and the central core pressure differential, disregards the central core and passes the shared area of bellows fly leaf down, and central core upward force is:

1. the water return pressure P2S in the movable plate of the lower bellows acts; s is the same under the action area of the corrugated pipe;

2. fluid pressure P1S acting on the upper bellows plate;

3. air pressure P3S acting within the differential bellows;

the central core down force is:

1. water inlet pressure P1S acting in the upper bellows movable plate;

2. fluid pressure P2S acting on the lower bellows plate;

the central core balance condition is that the resultant force is zero,

2 P2S+P3S＝P1S+P2S (1)

because the diameters of the three corrugated pipes are the same and are S, the above formula is arranged as follows:

P1-P2＝P3 (2)

the pressure difference between the inlet water and the return water is obtained by the formula (2) and is related to the charging pressure P3 and is not related to other parameters.

The charging pressure P3 is the air pressure artificially charged in advance according to the heat used by the user, the pipe pressure difference device is at the maximum opening under the action of the charging pressure P3, the opening of the backwater outlet pipe 12 is at the maximum opening, when the pressure of the fluid pressure P1 of the upper bellows movable plate is high, the backwater pressure P2 in the lower bellows movable plate is at the full opening position due to the starting pipe pressure difference device, the pressure is low, under the action of the fluid pressure P1 of the upper bellows movable plate, the central core moves downwards, the opening of the backwater outlet pipe 12 gradually decreases, the backwater pressure P2 in the lower bellows movable plate gradually increases until P1-P2 is P3, the stress of the central core is balanced, when the pressure of the inlet P1 changes, the P2 also changes, the stress of the central core is unbalanced, the central core moves to reach the new balance P1-P2-P3, when the user increases or decreases, the P2 changes, the stress balance, a new equilibrium P1-P2 ═ P3 is also reached. Changes in the outlet pressure P4 for various reasons can also cause changes in P2, and a new equilibrium is reached also due to the action of P2.

The analysis shows that no matter the pressure at the outlet of the inlet, the return and the differential pressure device changes or the user changes, the differential pressure of the pipeline differential pressure device is only related to the inflation pressure and is not related to other parameters.

Claims

1. A pipe pressure differential, comprising:

has a cylinder body;

the upper end of the cylinder body is fixedly connected with an upper cover, and the lower end of the cylinder body is fixedly connected with a lower cover;

a backwater inlet pipe is connected to the side wall of the middle part of the cylinder body, and a backwater outlet pipe is welded in a penetrating way;

an upper corrugated pipe is accommodated above the inner part of the cylinder body;

the upper end of the upper corrugated pipe is welded with the upper cover, and the lower end of the upper corrugated pipe is welded with the upper corrugated pipe movable plate; the upper corrugated pipe movable plate is fixedly connected with the top end of the central core;

a central seat fixedly connected with a backwater outlet pipe is arranged in the middle of the cylinder body, and a central core is in through connection with the central seat;

a lower corrugated pipe fixing plate is fixedly connected to the middle part in the cylinder body, and a movable sealing ring is arranged at the center of the fixing plate; the lower corrugated pipe fixing plate is welded with the lower corrugated pipe, and the lower corrugated pipe is welded with the lower corrugated pipe movable plate;

the lower part in the cylinder body is provided with a differential pressure corrugated pipe welded with the lower cover, and the upper end of the differential pressure corrugated pipe is welded with a movable plate of the differential pressure corrugated pipe; the differential bellows movable plate is abutted with the central core.

2. The pipe pressure differential device of claim 1, wherein:

3. The pipe pressure differential device of claim 1, wherein:

4. The pipe pressure differential device of claim 1, wherein:

5. The pipe pressure differential device of claim 1, wherein:

6. The pipe pressure differential device of claim 1, wherein: