Automatic liquid nitrogen pressurization and pressure relief device for copper pipe production

Abstract

The utility model provides an automatic liquid nitrogen pressurization and pressure relief device for copper pipe production, which relates to the technical field of copper pipe production and comprises a conveying pipeline body, the outer surface of the conveying pipeline body is fixedly communicated with a monitoring pipe, the upper end of the monitoring pipe is fixedly connected with a monitoring sleeve through a flange, and the outer surface of the monitoring sleeve is fixedly communicated with a pressure relief pipe. One end of the pressure relief pipe fixedly communicates with an emptying tank, a liquid nitrogen booster pump is fixedly installed at the upper end of the emptying tank, and automatic monitoring of the liquid nitrogen pressure on the inner wall of the conveying pipeline body is achieved through the pressure monitoring device; according to the liquid nitrogen conveying pipe, automatic pressure relief is carried out when the pressure of liquid nitrogen in the conveying pipe body exceeds a preset value, the discharged liquid nitrogen is stored, and automatic pressurization is carried out on the stored liquid nitrogen when the pressure of the liquid nitrogen in the conveying pipe body is lower than the preset value, so that the stability of the pressure of the liquid nitrogen in the conveying pipe body is guaranteed; and therefore, the production quality of the copper pipe is improved.

Description

Technical Field

[0001] This utility model relates to the field of copper tube production technology, and in particular to an automatic liquid nitrogen pressurization and depressurization device for copper tube production. Background Technology

[0002] During the production of copper tubes, such as after the drawing or extrusion molding process, nitrogen gas needs to be introduced into the copper tube to prevent oxidation inside.

[0003] Nitrogen is typically stored in liquid nitrogen. For easy transport, a constant pressure must be maintained within the liquid nitrogen tank; however, excessive pressure poses a risk of tank rupture. The current solution is manual pressure relief, where a pressure relief valve is opened when the pressure exceeds a threshold. However, manual pressure relief is highly subjective and depends on the operator's responsibility, thus safety cannot be guaranteed. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide an automatic liquid nitrogen pressurization and depressurization device for copper tube production, which can automatically depressurize and automatically pressurize after depressurization.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An automatic liquid nitrogen pressurization and depressurization device for copper tube production includes a conveying pipeline body, a monitoring pipe fixedly connected to the outer surface of the conveying pipeline body, a monitoring sleeve fixedly connected to the upper end of the monitoring pipe via a flange, a depressurization pipe fixedly connected to the outer surface of the monitoring sleeve, a venting tank fixedly connected to one end of the depressurization pipe, a liquid nitrogen pressurization pump fixedly installed at the upper end of the venting tank, a pressurization pipe fixedly connected to one end of the liquid nitrogen pressurization pump, and a pressurization pipe fixedly connected to the outer surface of the conveying pipeline body.

[0007] The monitoring sleeve is equipped with a pressure monitoring device, which includes an annular sealing block. The outer surface of the annular sealing block is fixedly sleeved with the inner wall of the monitoring sleeve.

[0008] Preferably, a lead screw is mounted on the upper surface of the monitoring sleeve via a bearing, and an adjustment handle is fixedly connected to the upper end of the lead screw.

[0009] Preferably, the other end of the lead screw passes through and extends into the interior of the monitoring sleeve, and a threaded sleeve is threadedly connected to the outer surface of the other end of the lead screw, with an adjusting plate fixedly connected to the lower end of the threaded sleeve.

[0010] Preferably, the outer surface of the adjusting plate is movably sleeved with the inside of the monitoring sleeve, and the inner wall of the adjusting plate is movably sleeved with symmetrically distributed guide rods, one end of each of the two guide rods being fixedly connected to a pressure plate.

[0011] Preferably, the outer surface of the pressure plate is movably sleeved with the outer surface of the monitoring sleeve, a support spring is fixedly connected to the upper surface of the pressure plate, one end of the support spring is fixedly connected to the lower surface of the adjusting plate, and a sealing plug is movably sleeved on the inner wall of the monitoring sleeve.

[0012] Preferably, the lower surface of the sealing plug contacts the upper end of the annular sealing block, and a pressure sensor is fixedly installed on the upper surface of the sealing plug, with the upper end of the pressure sensor fixedly installed to the lower end of the pressure plate.

[0013] Preferably, a first check valve is fixedly installed on the outer surface of the pressure relief pipe, and a second check valve is fixedly installed on the outer surface of the pressure boosting pipe.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] In this invention, a pressure monitoring device is used to automatically monitor the liquid nitrogen pressure on the inner wall of the conveying pipe body. When the liquid nitrogen pressure inside the conveying pipe body exceeds a preset value, the device automatically releases pressure and stores the released liquid nitrogen. Furthermore, when the liquid nitrogen pressure inside the conveying pipe body falls below the preset value, the device automatically pressurizes the stored liquid nitrogen, thereby ensuring the stability of the liquid nitrogen pressure inside the conveying pipe body and improving the production quality of copper pipes. Attached Figure Description

[0016] Figure 1 A schematic diagram of the main structure of an automatic liquid nitrogen pressurization and depressurization device for copper tube production provided by this utility model;

[0017] Figure 2 A three-dimensional view of the vent tank structure of an automatic liquid nitrogen pressurization and depressurization device for copper tube production provided by this utility model;

[0018] Figure 3 A three-dimensional view of the monitoring sleeve structure of an automatic liquid nitrogen pressurization and depressurization device for copper tube production provided by this utility model;

[0019] Figure 4 A perspective view of the lead screw structure of an automatic liquid nitrogen pressurization and depressurization device for copper tube production provided by this utility model;

[0020] Figure 5 An exploded view of the sealing plug structure of an automatic liquid nitrogen pressurization and depressurization device for copper tube production provided by this utility model.

[0021] Legend: 1. Pipeline body; 2. Monitoring pipe; 3. Monitoring sleeve; 4. Pressure relief pipe; 5. Vent tank; 6. Liquid nitrogen booster pump; 7. Booster pipe; 8. Annular sealing block; 81. Screw; 82. Adjusting handle; 83. Threaded sleeve; 84. Adjusting plate; 85. Guide rod; 86. Pressure plate; 87. Support spring; 88. Sealing plug; 89. Pressure sensor; 810. First check valve; 811. Second check valve. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0023] To facilitate understanding of this utility model, a more comprehensive description of this utility model will be provided below with reference to relevant embodiments, and several embodiments of this utility model will be given. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of this utility model more thorough and complete.

[0024] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0026] Example

[0027] like Figure 1-5As shown, this utility model provides a technical solution: an automatic liquid nitrogen pressurization and depressurization device for copper tube production, including a conveying pipeline body 1, a monitoring pipe 2 fixedly connected to the outer surface of the conveying pipeline body 1, a monitoring sleeve 3 fixedly connected to the upper end of the monitoring pipe 2 through a flange, a depressurization pipe 4 fixedly connected to the outer surface of the monitoring sleeve 3, a venting tank 5 fixedly connected to one end of the depressurization pipe 4, a liquid nitrogen pressurization pump 6 fixedly installed at the upper end of the venting tank 5, a pressurization pipe 7 fixedly connected to one end of the liquid nitrogen pressurization pump 6, and a pressurization pipe 7 fixedly connected to the outer surface of the conveying pipeline body 1.

[0028] The monitoring sleeve 3 is equipped with a pressure monitoring device, which includes an annular sealing block 8. The outer surface of the annular sealing block 8 is fixedly sleeved with the inner wall of the monitoring sleeve 3.

[0029] A lead screw 81 is mounted on the upper surface of the monitoring sleeve 3 via a bearing, and an adjusting handle 82 is fixedly connected to the upper end of the lead screw 81.

[0030] The other end of the lead screw 81 passes through and extends into the interior of the monitoring sleeve 3. The outer surface of the other end of the lead screw 81 is threadedly connected to a threaded sleeve 83. The lower end of the threaded sleeve 83 is fixedly connected to an adjusting plate 84. The rotation of the lead screw 81 drives the adjusting plate 84 to move up and down through the threaded sleeve 83.

[0031] The outer surface of the adjusting plate 84 is movably sleeved with the inside of the monitoring sleeve 3. The inner wall of the adjusting plate 84 is movably sleeved with symmetrically distributed guide rods 85. One end of each guide rod 85 is fixedly connected to a pressure plate 86. The guide rods 85 improve the stability of the pressure plate 86 when it moves up and down. The guide rods 85 are two-section telescopic rods. The upper telescopic rod is fixedly connected to the inner top wall of the monitoring sleeve 3, thereby preventing the adjusting plate 84 from rotating.

[0032] The outer surface of the pressure plate 86 is movably sleeved with the outer surface of the monitoring sleeve 3. A support spring 87 is fixedly connected to the upper surface of the pressure plate 86. One end of the support spring 87 is fixedly connected to the lower surface of the adjusting plate 84. A sealing plug 88 is movably sleeved on the inner wall of the monitoring sleeve 3. The adjusting plate 84 changes the elastic potential energy of the support spring 87, thereby adjusting the pressure applied to the pressure plate 86.

[0033] The lower surface of the sealing plug 88 contacts the upper end of the annular sealing block 8. A pressure sensor 89 is fixedly installed on the upper surface of the sealing plug 88. The upper end of the pressure sensor 89 is fixedly installed on the lower end of the pressure plate 86. The pressure sensor 89 is electrically connected to an external display, thereby avoiding the transmission of pressure values ​​to the display via electrical signals, which facilitates the operator's viewing.

[0034] A first check valve 810 is fixedly installed on the outer surface of the pressure relief pipe 4, and a second check valve 811 is fixedly installed on the outer surface of the pressure boosting pipe 7. The first check valve 810 and the second check valve 811 respectively prevent backflow in the pressure relief pipe 4 and the pressure boosting pipe 7.

[0035] The pressure monitoring device enables automated monitoring of the liquid nitrogen pressure inside the conveying pipe body 1. When the liquid nitrogen pressure inside the conveying pipe body 1 exceeds the preset value, it automatically releases pressure and stores the released liquid nitrogen. It also automatically pressurizes the stored liquid nitrogen when the liquid nitrogen pressure inside the conveying pipe body 1 is lower than the preset value, thereby ensuring the stability of the liquid nitrogen pressure inside the conveying pipe body and improving the production quality of copper pipes.

[0036] The working process of this utility model:

[0037] Step 1: Before use, first rotate the lead screw 81 by adjusting the handle 82. The rotation of the lead screw 81 drives the adjusting plate 84 to move downward through the threaded sleeve 83. The movement of the adjusting plate 84 causes the support spring 87 to be squeezed and contracted. The elastic force of the support spring 87 applies pressure to the pressure sensor 89 through the pressure plate 86. At this time, the operator can check the pressure value through the external display. When it rises to the preset value, stop rotating the lead screw 81.

[0038] Step 2: Liquid nitrogen is transported through the main body of the conveying pipeline 1. The pressure during liquid nitrogen transport is applied through the detection tube to the lower end of the sealing plug 88, causing the sealing plug 88 to rise slightly and move away from contact with the annular sealing block 8. At this time, the pressure sensor 89 on the display increases, but remains within the preset pressure range.

[0039] Step 3: When the liquid nitrogen pressure inside the conveying pipe body 1 continues to rise, the sealing plug 88 drives the support spring 87 to continuously contract and disengage from the pressure relief pipe 4. At this time, the liquid nitrogen is transported to the venting tank 5 for storage through the cooperation of the pressure relief pipe 4 and the first one-way valve 810, thereby reducing the liquid nitrogen pressure inside the conveying pipe body. When the pressure returns to normal, the sealing plug 88 moves down to seal the pressure relief pipe 4 through the elastic force of the support spring 87.

[0040] Step 4: When the liquid nitrogen pressure inside the main body of the conveying pipeline 1 is lower than the minimum set value, the pressure on the lower end of the sealing plug 88 decreases, thereby causing the elastic force of the supporting spring 87 to drive the sealing plug 88 to continue to descend and move until it contacts the annular sealing block 8. At the same time, the pressure value on the display will continue to decrease. The liquid nitrogen booster pump 6 is started by the external PLC controller to transport the liquid nitrogen in the vent pipe to the inside of the pipeline body through the booster pipe 7 and the second one-way valve 811, thereby increasing the conveying pressure of liquid nitrogen inside the pipeline body. When the pressure stabilizes, the operation of the liquid nitrogen booster pump 6 can be stopped.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic liquid nitrogen pressurization and depressurization device for copper tube production, comprising a conveying pipeline body (1), characterized in that: The outer surface of the conveying pipeline body (1) is fixedly connected to a monitoring pipe (2). The upper end of the monitoring pipe (2) is fixedly connected to a monitoring sleeve (3) via a flange. The outer surface of the monitoring sleeve (3) is fixedly connected to a pressure relief pipe (4). One end of the pressure relief pipe (4) is fixedly connected to a venting tank (5). The upper end of the venting tank (5) is fixedly installed with a liquid nitrogen booster pump (6). One end of the liquid nitrogen booster pump (6) is fixedly connected to a booster pipe (7). One end of the booster pipe (7) is fixedly connected to the outer surface of the conveying pipeline body (1). The monitoring sleeve (3) is equipped with a pressure monitoring device inside, and the pressure monitoring device includes an annular sealing block (8), the outer surface of which is fixedly sleeved with the inner wall of the monitoring sleeve (3).

2. The automatic liquid nitrogen pressurization and depressurization device for copper tube production according to claim 1, characterized in that: The upper surface of the monitoring sleeve (3) is fitted with a lead screw (81) via a bearing, and an adjustment handle (82) is fixedly connected to the upper end of the lead screw (81).

3. The automatic liquid nitrogen pressurization and depressurization device for copper tube production according to claim 2, characterized in that: The other end of the lead screw (81) passes through and extends into the interior of the monitoring sleeve (3). The outer surface of the other end of the lead screw (81) is threadedly connected to a threaded sleeve (83). The lower end of the threaded sleeve (83) is fixedly connected to an adjusting plate (84).

4. The automatic liquid nitrogen pressurization and depressurization device for copper tube production according to claim 3, characterized in that: The outer surface of the adjusting plate (84) is movably sleeved with the inside of the monitoring sleeve (3). The inner wall of the adjusting plate (84) is movably sleeved with symmetrically distributed guide rods (85), and one end of each of the two guide rods (85) is fixedly connected to a pressure plate (86).

5. The automatic liquid nitrogen pressurization and depressurization device for copper tube production according to claim 4, characterized in that: The outer surface of the pressure plate (86) is movably sleeved with the outer surface of the monitoring sleeve (3). A support spring (87) is fixedly connected to the upper surface of the pressure plate (86). One end of the support spring (87) is fixedly connected to the lower surface of the adjusting plate (84). A sealing plug (88) is movably sleeved on the inner wall of the monitoring sleeve (3).

6. The automatic liquid nitrogen pressurization and depressurization device for copper tube production according to claim 5, characterized in that: The lower surface of the sealing plug (88) is in contact with the upper end of the annular sealing block (8), and a pressure sensor (89) is fixedly installed on the upper surface of the sealing plug (88). The upper end of the pressure sensor (89) is fixedly installed with the lower end of the pressure plate (86).

7. The automatic liquid nitrogen pressurization and depressurization device for copper tube production according to claim 1, characterized in that: The outer surface of the pressure relief pipe (4) is fixedly equipped with a first one-way valve (810), and the outer surface of the pressure boosting pipe (7) is fixedly equipped with a second one-way valve (811).

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