CN214270955U

CN214270955U - Nitrogen purging device for inner wall of copper pipe

Info

Publication number: CN214270955U
Application number: CN202023191376.5U
Authority: CN
Inventors: 李昌文
Original assignee: Chongqing Hailiang Copper Co ltd
Current assignee: Chongqing Hailiang Copper Co ltd
Priority date: 2020-12-26
Filing date: 2020-12-26
Publication date: 2021-09-24
Anticipated expiration: 2030-12-26

Abstract

The utility model belongs to the technical field of the copper pipe processing, a copper pipe inner wall nitrogen gas sweeps device is provided, sweep the device body including nitrogen gas, still including pressing the operation pipeline including parallelly connected low pressure section operation pipeline and high-pressure section, be provided with the low pressure pneumatic ball valve and the relief pressure valve of establishing ties on low pressure section operation pipeline, be provided with high pressure pneumatic ball valve on high-pressure section operation pipeline. The utility model discloses set up the control line into parallelly connected low pressure section operation pipeline and high pressure section pressure operation pipeline, equipment set pressure operation when below 15MPa, the high pressure shutoff valve is turn-offed, the low pressure shutoff valve is opened and is used low pressure operation pipeline, set pressure is greater than valve set pressure back low pressure shutoff valve self-closing, the high pressure shutoff valve is automatic to be opened just so on the high pressure pipeline with automatic switch-over, thereby guaranteed that the straight stroke valve can not also guaranteed the continuation of flow when also can normally adjusting actual pressure by the circumstances of turn-off when sweeping pressure very low, the valve has directly guaranteed the copper pipe inner wall and has swept the quality.

Description

Nitrogen purging device for inner wall of copper pipe

Technical Field

The utility model belongs to the technical field of the copper pipe processing, specific theory relates to a copper pipe inner wall nitrogen gas sweeps device.

Background

The large dispersion plate is widely adopted in the copper pipe machining process, has the characteristics of high annealing speed, simplicity in operation, good control precision, high efficiency and the like, becomes indispensable key equipment in the air conditioner pipe manufacturing process, and is gradually popularized to other copper pipe machining processes. And during processing, the copper pipe is discharged from the discharging frame, enters a material receiving mechanism through straightening, cleaning, flaw detection, annealing, cooling, traction and pre-bending and is received into a specified shape through the mutual matching of the material receiving device and the pre-bending device.

In this annealing course of working, all must guarantee completely and air isolation through interior outer wall, at this moment, need use the inner wall to sweep the mechanism, however, current inner wall sweeps the mechanism and is sweeping the set pressure, the valve aperture of straight travel control is very little under the lower circumstances of flow (copper pipe length when 0 ~ 1000 meters), the valve can be closed when copper intraductal pressure is greater than the set pressure, thereby lead to the flow zero often appearing, the condition that pressure is cut off, lead to the oxidation to appear in the copper pipe inner wall, the yield of product has been seriously influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the set pressure that sweeps greatly scattered, under the lower condition of flow (copper pipe length when 0 ~ 1000 meters), the copper pipe inner wall oxidation problem that leads to provides a copper pipe inner wall nitrogen gas sweeps device.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a copper pipe inner wall nitrogen gas sweeps device, includes nitrogen gas and sweeps the device body, nitrogen gas sweeps the device body and includes the main line, and sets up on the main line by electronic straight stroke control valve, first pressure transmitter, second pressure transmitter, flowmeter, thermometer and the bleed valve that input to output set gradually, its characterized in that, still including be located the input and with the control line that the main line is connected, control line includes parallelly connected low pressure section operation pipeline and high pressure section pressure operation pipeline be provided with the pneumatic ball valve of low pressure and the relief pressure valve of series connection on the low pressure section operation pipeline be provided with high-pressure pneumatic ball valve on the high pressure section operation pipeline.

Preferably, the outlet pressure of the pressure reducing valve is 12-15 MPa.

Preferably, the operating pressure value of the low-pressure section operating pipeline is smaller than a set pressure value.

Further, the operating pressure value of the low-pressure section operating pipeline is 0-15 MPa.

Preferably, the operating pressure value of the high-pressure section operating pipeline is greater than a set pressure value.

Further, the operating pressure value of the high-pressure section operating pipeline is 15-35 MPa.

Preferably, the pressure reducing valve has a pressure resistance of 35 MPa.

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

the utility model discloses set up control line to parallelly connected low pressure section operation pipeline (0-15MPa) and high pressure section pressure operation pipeline (15-35MPa), when equipment settlement pressure operation is below 15MPa, the high pressure shutoff valve is turn-offed, low pressure shutoff valve is opened and is used low pressure operation pipeline, set pressure is greater than valve settlement pressure (15MPa) back low pressure shutoff valve self-closing, high pressure shutoff valve is automatic to be opened just so automatic switch-over to the high-pressure pipeline, thereby guaranteed that the straight stroke valve can not also guarantee the continuation of flow when also can normally adjusting actual pressure by the circumstances of turn-offeing when sweeping pressure very low, the valve has directly guaranteed the copper pipe inner wall and has swept the quality.

Drawings

Fig. 1 is a schematic view of the present invention.

Wherein, the names corresponding to the reference numbers are as follows: 1-low pressure pneumatic ball valve; 2-high pressure pneumatic ball valve; 3-a pressure reducing valve; 4-electric straight stroke regulating valve; 5-main pipeline; 6-a first pressure transmitter; 7-a second pressure transmitter; 8-a flow meter; 9-a thermometer; 10-air release valve; 11-low pressure section operation pipeline; 12-high pressure section operation pipeline.

Detailed Description

In order to make the present invention more clear to those skilled in the art, the present invention will be further described in detail with reference to the following embodiments. It should be understood that the following specific embodiments are only for explaining the present invention, and it is convenient to understand that the technical solutions provided by the present invention are not limited to the technical solutions provided by the following embodiments, and the technical solutions provided by the embodiments should not limit the protection scope of the present invention.

Examples

The high-pressure nitrogen inlet pressure is 25-30 MPa, the set pressure of the copper pipe during initial processing is 2MPa, curve analysis shows that during production, the initial pressure is reached when the opening of the straight stroke valve is very small (3-6%), the pressure relief speed of the inner wall of the copper pipe is low, the flow is zero after the valve is completely shut off, and when the pressure in the copper pipe is lower than the set pressure, the straight stroke valve is slowly opened. From the above analysis it can be seen that: in the above production process, in the process of completely closing the straight stroke valve to reopening, the inner wall of the copper pipe may be in a state of pressure (low-pressure set value) and no flow for a long time, so as to cause oxidation of the inner wall.

As shown in fig. 1, copper pipe inner wall nitrogen gas sweeps device, sweep the device body including nitrogen gas, nitrogen gas sweeps the device body and includes the main line, and set up the electronic straight stroke control valve that sets gradually by input to output on the main line, first pressure transmitter, second pressure transmitter, the flowmeter, thermometer and bleed valve, a serial communication port, still including being located the input and with the control pipeline of main line connection, control pipeline includes parallelly connected low pressure section operation pipeline and high pressure section pressure operation pipeline, be provided with the pneumatic ball valve of low pressure and the relief pressure valve of series connection on low pressure section operation pipeline, be provided with the pneumatic ball valve of high pressure on high pressure section operation pipeline. Preferably, the pressure of the pressure reducing valve is 35MP, and the outlet pressure of the pressure reducing valve is adjusted to 12-15 MPa. The utility model discloses in, each valve all adopts control system to carry out automatic control, and control system is not the utility model discloses a main improvement point, the event is not repeated here.

In a preferred embodiment, the operating pressure value of the low-pressure section operating pipeline is less than the set pressure value; setting the pressure value to be 15MPa, and then setting the operating pressure value of the low-pressure section operating pipeline to be 0-15MPa, wherein the operating pressure value does not contain 15 MPa; and if the operating pressure value of the high-pressure section operating pipeline is greater than the set pressure value, the operating pressure value of the high-pressure section operating pipeline is 15-35 MPa. It should be understood that, a person skilled in the art may adjust the set pressure value according to the actual working condition, and if the set pressure value is N and the pressure resistance of the pressure reducing valve is Y, the operating pressure value of the low-pressure section operating pipeline is 0 to N (mpa), and the operating pressure value of the high-pressure section operating pipeline is N to Y.

The utility model discloses a theory of operation: the control pipeline with double threads is adopted, one line is a high-pressure pipeline, the other line is a low-pressure pipeline, the operating pressure value of the high-pressure pipeline is greater than a set pressure value, the high-pressure pipeline meets the working operation above the set pressure value, the operating pressure value of the low-pressure pipeline is less than the set pressure value, and the low-pressure pipeline meets the working operation below the set pressure value. The switching between high pressure and low pressure is realized during the operation, thereby avoiding the problem that the inner wall of the copper pipe can be in a state of pressure (low pressure set value) and no flow for a long time, and avoiding the oxidation of the inner wall of the copper pipe; the set value is a value adjusted by a worker according to the working condition.

The above is the preferred embodiment of the present invention. It should be noted that, those skilled in the art can make several modifications without departing from the design principle and technical solution of the present invention, and these modifications should also be regarded as the protection scope of the present invention.

Claims

1. A nitrogen purging device for the inner wall of a copper pipe comprises a nitrogen purging device body, wherein the nitrogen purging device body comprises a main pipeline (5), and an electric straight stroke regulating valve (4), a first pressure transmitter (6), a second pressure transmitter (7), a flowmeter (8), a thermometer (9) and a deflation valve (10) which are arranged on the main pipeline (5) in sequence from the input end to the output end, characterized in that the device also comprises a control pipeline which is positioned at the input end and is connected with the main pipeline (5), the control pipeline comprises a low-pressure section running pipeline (11) and a high-pressure section running pipeline (12) which are connected in parallel, a low-pressure pneumatic ball valve (1) and a pressure reducing valve (3) which are connected in series are arranged on the low-pressure section running pipeline (11), and a high-pressure pneumatic ball valve (2) is arranged on the high-pressure section operation pipeline (12).

2. A nitrogen purging device for the inner wall of a copper pipe as claimed in claim 1, wherein: the outlet pressure of the pressure reducing valve (3) is 12-15 MPa.

3. A nitrogen purging device for the inner wall of a copper pipe as claimed in claim 2, wherein: and the operating pressure value of the low-pressure section operating pipeline (11) is less than the set pressure value.

4. A nitrogen purging device for the inner wall of a copper pipe as claimed in claim 3, wherein: the operating pressure value of the low-pressure section operating pipeline (11) is 0-15 MPa.

5. A nitrogen purging device for the inner wall of a copper pipe as claimed in claim 4, wherein: the operating pressure value of the high-pressure section operating pipeline (12) is greater than a set pressure value.

6. A nitrogen purging device for the inner wall of a copper pipe as claimed in claim 5, wherein: the operating pressure value of the high-pressure section operating pipeline (12) is 15-35 MPa.

7. A nitrogen purging device for the inner wall of a copper pipe as claimed in claim 6, wherein: the pressure resistance of the pressure reducing valve (3) is 35 MPa.