Gas supply device for isostatic pressing apparatus, control method, isostatic pressing apparatus

Abstract

This invention relates to a gas supply device, control method, and isostatic pressure equipment, specifically relating to the field of isostatic pressure equipment. The gas supply device includes: a gas source, a first valve, a compression device, and a second valve connected in sequence; a branch line is provided between the compression device and the second valve; a third valve is provided on the branch line; the first valve, the compression device, the second valve, and the third valve are connected to a control center. The gas supply device provided by this invention, by adding a valve group linkage device to the original design, adds a second valve, a branch line, and a third valve between the compressor and cylinder pipeline. By controlling the valve group, the purpose of immediate discharge of high-pressure gas is achieved, thereby solving the long-term pressure problem of the high-pressure pipeline between the compressor and cylinder and eliminating safety hazards.

Description

Technical Field

[0001] This invention relates to the field of isostatic pressure equipment, and specifically to an isostatic pressure equipment, a control method, and an isostatic pressure equipment. Background Technology

[0002] Currently, isostatic pressing technology enables the uniform compaction of materials in three dimensions, resulting in products with high density, low porosity, and excellent isotropy. Its applications are wide-ranging, encompassing powder metallurgy, advanced ceramics, cemented carbide, aerospace, nuclear power, biomedicine, and emerging solid-state battery manufacturing.

[0003] For example, CN110666175A discloses a hot isostatic pressing (HIP) method for nickel-based high-temperature alloy powder disks. Specifically, it is a method for hot isostatic pressing of nickel-based high-temperature alloy powder, suitable for preparing powder high-temperature alloy disks formed by direct hot isostatic pressing. The method uses high-temperature alloy powder prepared by plasma rotating electrode method as raw material. Under vacuum conditions, the powder is loaded into a sleeve and sealed before hot isostatic pressing. The temperature of the first step of hot isostatic pressing should be 10-30℃ higher than the γ' melting temperature, the pressure should be ≥100MPa, and the time should be ≤1h. After the first step, the temperature is raised to 50-100℃ below the liquidus temperature, the pressure should be ≥100MPa, and the time should be ≤30min. After the second step, the temperature is lowered to 10-20℃ below the melting temperature of the low-melting-point phase, the pressure should be ≥100MPa, the temperature is held for 30min, and then the furnace is cooled.

[0004] CN120055497A discloses a hot isostatic pressure diffusion welding method for copper busbars and alloy steel shafts. The hot isostatic pressure diffusion welding method includes the following steps: (1) performing surface treatment on the copper busbars and alloy steel shafts respectively to obtain treated copper busbars and treated alloy steel shafts; (2) assembling the treated copper busbars and treated alloy steel shafts and placing them in a sleeve for sleeve welding; (3) performing degassing treatment and hot isostatic pressure diffusion welding in sequence, removing the sleeve, and machining to obtain the finished product.

[0005] Isostatic pressing utilizes uniform static pressure to compress media, typically inert gases, which are usually stored in high-pressure tanks. During production, the gas in the high-pressure tank is pressurized by a compressor and then delivered to the cylinder of the hot isostatic press to achieve high-pressure production, generally exceeding 100 MPa. During this gas delivery process, because the pipeline between the compressor and the cylinder is connected to the cylinder, this section of pipeline bears the same pressure as the cylinder. This can cause the pipeline to be subjected to excessive pressure over a long period, making it prone to damage and leaks. Pipeline damage not only affects normal production, but more importantly, gas leaks pose a risk of asphyxiation and even death to personnel. Therefore, this traditional design presents significant equipment and personnel safety hazards. Summary of the Invention

[0006] In view of the problems existing in the prior art, the purpose of the present invention is to provide an air supply device, a control method, and an isostatic pressure device to solve the problems of damage and leakage caused by the pipeline between the compressor and the cylinder being subjected to the same pressure as the cylinder.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] In a first aspect, the present invention provides a gas supply device for an isostatic pressure apparatus, the gas supply device comprising:

[0009] The gas source, the first valve, the compression device, and the second valve are connected in sequence.

[0010] A branch is provided between the compression device and the second valve;

[0011] A third valve is installed on the branch line;

[0012] The first valve, the compression device, the second valve, and the third valve are connected to the control center.

[0013] The gas supply equipment provided by this invention adds a valve group linkage device to the original design. A second valve, a branch line and a third valve are added between the "compressor-cylinder" pipeline. By controlling the valve group, the purpose of timely discharge of high-pressure gas is achieved, thereby solving the long-term pressure problem of the "compressor-cylinder" high-pressure pipeline and eliminating safety hazards.

[0014] As a preferred embodiment of the present invention, the second valve is connected to the air inlet of the isostatic pressure device.

[0015] Preferably, the isostatic pressing equipment is connected to the control center.

[0016] As a preferred technical solution of the present invention, the gas source includes: gas storage equipment and / or gas production equipment.

[0017] As a preferred embodiment of the present invention, the compression device includes: a positive displacement compressor and / or a power compressor.

[0018] As a preferred embodiment of the present invention, a pressure detection device is provided on the pipeline between the compressor and the second valve.

[0019] Preferably, the pressure detection device is connected to the control center.

[0020] As a preferred embodiment of the present invention, the compression device includes at least two compressors connected in series.

[0021] As a preferred embodiment of the present invention, a temperature control device is provided between the second valve and the air inlet of the isostatic pressure device.

[0022] Preferably, the temperature control device is connected to the control center.

[0023] In a second aspect, the present invention provides a control method for a gas supply device as described in the first aspect, the control method comprising:

[0024] The control center obtains the pressurization requirements of the isostatic pressure equipment;

[0025] The control center adjusts the parameters of the compression equipment according to the pressurization requirements, opens the first valve and the second valve, closes the third valve to pressurize to the required pressure, and then the compression equipment stops, the second valve is closed, and the third valve is opened to release pressure.

[0026] As a preferred technical solution of the present invention, the pressurization requirement includes: linear pressurization or staged pressurization.

[0027] Preferably, the parameters of the compression device include: exhaust volume, power, and rotational speed.

[0028] Thirdly, the present invention provides an isostatic pressure device, the isostatic pressure device comprising: the gas supply device as described in the first aspect.

[0029] Compared with existing technical solutions, the present invention has the following beneficial effects:

[0030] The gas supply equipment provided by this invention adds a valve group linkage device to the original design. A second valve, a branch line, and a third valve are added between the "compressor-cylinder" pipeline. At the same time, it is combined with intelligent control by the control center. With the help of the control valve group, the purpose of timely discharge of high-pressure gas can be achieved, thereby solving the long-term pressure problem of the "compressor-cylinder" high-pressure pipeline, eliminating safety hazards, and facilitating the efficient operation of isostatic pressure equipment. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the gas supply equipment for the isostatic pressure device provided in an embodiment of the present invention.

[0032] In the diagram: 110 - air source, 120 - first valve, 130 - compression equipment, 140 - second valve, 151 - branch line, 152 - third valve, 200 - control center, 300 - isostatic pressure equipment;

[0033] Dotted lines represent data connections, such as those achieved through data connection lines.

[0034] The present invention will now be described in further detail. However, the examples described below are merely simplified examples of the present invention and do not represent or limit the scope of protection of the present invention. The scope of protection of the present invention is determined by the claims. Detailed Implementation

[0035] To better illustrate the present invention and facilitate understanding of its technical solutions, typical but non-limiting embodiments of the present invention are as follows:

[0036] Isostatic pressing typically uses an inert gas as the medium for pressing, where all equal static pressures are applied. This medium gas is usually stored in a high-pressure tank. During production, the gas in the high-pressure tank is pressurized by a compressor and then delivered to the cylinder of the hot isostatic press to achieve high-pressure production, typically above 100 MPa. During this gas delivery process, because the pipeline between the compressor and the cylinder is connected to the cylinder, this section of pipeline bears the same pressure as the cylinder. This can cause the pipeline to be subjected to excessive pressure for extended periods, easily leading to damage and leaks. Therefore, this invention optimizes the gas supply pipeline assembly, allowing for timely depressurization at the supply end after pressurization without affecting subsequent pressurization, thus improving the safety factor of isostatic pressing operations. Specifically:

[0037] I. This embodiment provides a gas supply device for an isostatic pressure device, such as... Figure 1 As shown, the gas supply equipment includes:

[0038] The gas source 110, the first valve 120, the compression device 130, and the second valve 140 are connected in sequence.

[0039] A branch line 151 is provided between the compression device 130 and the second valve 140;

[0040] A third valve 152 is provided on the branch 151;

[0041] The first valve 120, the compression device 130, the second valve 140 and the third valve 152 are connected to the control center 200.

[0042] In this invention, the isostatic pressing device 300 refers to a device that uses a sealed high-pressure container to form a product under an ultra-high pressure state with uniform pressure in all directions.

[0043] In this invention, the compression device 130 refers to an industrial device that uses mechanical energy to compress gas to increase its pressure.

[0044] In this invention, the first valve 120, the second valve 140, and the third valve 152 are electrically controllable valves. Specifically, they can be selected as electrically controllable valves, or they can be implemented by a design that combines an electrically control device with a mechanical valve. In this way, the valve linkage control can be realized through the control center 200.

[0045] The second valve 140 is connected to the air inlet of the isostatic pressure device 300.

[0046] The isostatic pressure device 300 is connected to the control center 200.

[0047] In this invention, the control center 200 is equipped with devices capable of logic control, such as industrial computers, PLC controllers, and other commonly used industrial automation controllers.

[0048] In this invention, the logic control of the control center 200 is implemented through intelligent algorithms or machine programming languages. It can be either commercially available embedded logic control or a control process designed by the user.

[0049] The gas source 110 includes: a gas storage device and / or a gas production device.

[0050] In this invention, the gas storage device can be a commercially available gas cylinder or a conventional gas storage device in the field, as long as it can ensure a stable gas supply, such as a liquid argon tank + vaporizer, and further used in conjunction with a gas cylinder group for backup.

[0051] In this invention, gas production equipment refers to equipment capable of providing source gas that meets the requirements, such as argon separation equipment.

[0052] In this invention, the gas provided by the gas source 110 is reasonably selected according to actual needs, ensuring that it does not have a negative impact on the isostatic pressure product. For example, nitrogen or argon can be selected.

[0053] The compression device 130 includes a positive displacement compressor and / or a power compressor.

[0054] In this invention, the compression equipment used can be selected according to the pressure requirements of isostatic pressure.

[0055] A pressure detection device is installed on the pipeline between the compression device 130 and the second valve 140.

[0056] The pressure detection device is connected to the control center 200.

[0057] In this invention, by setting up a pressure detection device, after the control center 200 detects that the pressure of the isostatic pressure device 300 meets the requirements, the second valve 140 is closed, and then the third valve 152 is opened to release pressure. At the same time, the pressure detection device is used to determine whether the pressure release is complete and whether the third valve 152 is properly opened and closed.

[0058] Furthermore, the pressure detection equipment can also be used in conjunction with the control center 200 to directly control the third valve 152 to reduce pressure and achieve emergency pressure relief in the event of valve failure or excessively high pipe pressure.

[0059] The compression device 130 includes at least two compressors connected in series.

[0060] In this invention, the configuration of the compressor stages can be reasonably selected according to the pressurization requirements of the isostatic pressure equipment 300. By adopting a multi-stage compression method, the low-pressure compressor can quickly fill the tank, while the high-pressure compressor is responsible for the final pressurization and pressure holding, which can significantly improve the energy-saving effect. At the same time, the operation mode of multi-stage compressors can also reduce the number of compressor start-ups and shutdowns.

[0061] A temperature control device is configured between the second valve 140 and the air inlet of the isostatic pressure device 300.

[0062] The temperature control device is connected to the control center 200.

[0063] In this invention, the temperature control device is used to monitor and regulate the temperature of the gas entering the isostatic pressing device 300, thereby pre-controlling the temperature parameters of isostatic pressing and ensuring that the temperature of the isostatic pressing device 300 is more accurate.

[0064] It should be noted that the temperature control device of the present invention can also be configured in other locations of the gas supply equipment to achieve temperature monitoring and regulation.

[0065] Furthermore, a filter device can be optionally configured at the air inlet, intermediate pipeline, or air outlet of the gas supply equipment. Preferably, a filter device is configured at the air inlet, such as between the gas source 110 and the first valve 120, to remove particles, dust, and other impurities that may be mixed in the gas supplied by the gas source 110, so as to prevent adverse effects on the relevant equipment under high pressure.

[0066] Furthermore, an oxygen monitoring sensor is configured at the inlet of the second valve 140 and the isostatic pressure device 300. The oxygen monitoring sensor is connected to the control center 200 to detect the oxygen in the gas source 110 so as to control it in time when there is abnormal oxygen content and avoid the oxygen from having an adverse effect on the isostatic pressure process.

[0067] Furthermore, a gas recovery device can be optionally installed at the gas outlet of branch 151 to recover the depressurized gas. Furthermore, branch 151 can be used as the depressurization end of isostatic pressure device 300 by control center 200, so that the gas used for pressurization in isostatic pressure device 300 can be recovered.

[0068] In this invention, the recovered gas, after purification and filtration, can be directly fed into the gas supply equipment through the gas source 110 for reuse, thereby achieving efficient utilization of the gas.

[0069] In this invention, the control center 200 and the isostatic pressure device 300 are associated, so that the gas supply equipment can be controlled in conjunction with the operating conditions of the isostatic pressure device 300. For example, the branch 151 can be used as a pressure relief end to relieve pressure on the isostatic pressure device 300, thereby further simplifying the design of the isostatic pressure device 300.

[0070] II. This embodiment provides a control method for a gas supply device, the control method comprising:

[0071] The control center 200 obtains the pressurization requirements of the isostatic pressure equipment 300;

[0072] The control center 200 adjusts the parameters of the compression equipment 130 according to the pressurization requirements, and opens the first valve 120 and the second valve 140, closes the third valve 152 to pressurize to the required pressure, and then the compression equipment 130 stops, closes the second valve 140, and opens the third valve 152 to release pressure.

[0073] The pressurization requirements include: linear pressurization or staged pressurization.

[0074] In this invention, linear pressurization refers to continuously increasing the pressure to the required pressure at a constant pressurization rate.

[0075] In this invention, graded pressurization refers to using different pressurization rates to increase the pressure to the required pressure.

[0076] The parameters of the compression device 130 include: exhaust volume, power and speed.

[0077] In this invention, the compression capacity of the compression device 130 is controlled by adjusting the parameters of the compression device 130, so as to ensure that excellent compression effect is achieved under optimal working conditions, thereby achieving energy saving effect.

[0078] III. This embodiment provides an isostatic pressure device 300, which includes: a gas supply device.

[0079] In this invention, the isostatic pressure device 300 uses the gas supply device of this invention as the gas supply end, which can achieve good gas supply to the isostatic pressure device 300, with stable and efficient effect, and can ensure the stable operation of the isostatic pressure device.

[0080] In this invention, the isostatic pressing process corresponding to the isostatic pressing equipment 300 is divided into three different types according to the temperature during molding and consolidation: cold isostatic pressing, warm isostatic pressing, and hot isostatic pressing.

[0081] Cold isostatic pressing is usually carried out at room temperature and is mainly used for powder molding to provide a blank for subsequent sintering; warm isostatic pressing generally operates at a temperature of 50-500℃ and a pressure of 50-500MPa, and is used in the mass production of solid-state batteries; hot isostatic pressing is carried out at both high temperature and high pressure and is used for the final densification, diffusion bonding and defect repair of materials.

[0082] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0083] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

[0084] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed by the present invention.

Claims

1. A gas supply device for an isostatic pressing apparatus, characterized by The gas supply equipment includes: The gas source, the first valve, the compression device, and the second valve are connected in sequence. A branch is provided between the compression device and the second valve; A third valve is installed on the branch line; The first valve, the compression device, the second valve, and the third valve are connected to the control center.

2. The gas supply apparatus of claim 1, wherein The second valve is connected to the air inlet of the isostatic pressure equipment; Preferably, the isostatic pressing equipment is connected to the control center.

3. The gas supply apparatus of claim 1, wherein The gas source includes: gas storage equipment and / or gas production equipment.

4. The gas supply equipment as described in claim 1, characterized in that, The compression equipment includes: a positive displacement compressor and / or a power compressor.

5. The gas supply equipment as described in claim 1, characterized in that, A pressure detection device is installed on the pipeline between the compressor and the second valve; Preferably, the pressure detection device is connected to the control center.

6. The gas supply equipment as described in claim 1, characterized in that, The compression device includes at least two compressors connected in series.

7. The gas supply equipment as described in claim 1, characterized in that, A temperature control device is configured between the second valve and the air inlet of the isostatic pressure device; Preferably, the temperature control device is connected to the control center.

8. A control method for a gas supply device as described in any one of claims 1-7, characterized in that, The control method includes: The control center obtains the pressurization requirements of the isostatic pressure equipment; The control center adjusts the parameters of the compression equipment according to the pressurization requirements, opens the first valve and the second valve, closes the third valve to pressurize to the required pressure, and then the compression equipment stops, the second valve is closed, and the third valve is opened to release pressure.

9. The control method as described in claim 8, characterized in that, The pressurization requirements include: linear pressurization or staged pressurization; Preferably, the parameters of the compression device include: exhaust volume, power, and rotational speed.

10. An isostatic pressing device, characterized in that, The isostatic pressure device includes: the gas supply device as described in any one of claims 1-7.

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