Self-switching type vacuum-pumping system of super-long time hot chamber environmental mechanical test device

Abstract

The invention relates to the field of heat treatment equipment, and discloses a self-switching type vacuum-pumping system of a super-long-time hot chamber environment mechanical test device, which comprises a host supporting frame, a hot chamber environment assembly, a self-switching type vacuum-pumping system, a vacuum assembly and a water cooling system, the hot chamber environment assembly is mainly composed of a high-temperature-resistant replaceable clamp, a dynamic sealing assembly, a deformation measurement small chamber assembly, a double-layer water-cooling vacuum chamber, a temperature measurement module, a side insertion type deformation measurement assembly and a non-contact measurement assembly. The self-switching type vacuumizing system is used for controlling test pressure and mainly comprises a molecular pump supporting plate, a vacuum three-way pipeline, a vacuum assembly and a molecular pump support. Two groups of vacuum pipelines are designed, one group can be selected to work during testing, and if the vacuum pipeline of the working group is detected to have problems, the system automatically switches the standby group, so that the sample can be effectively prevented from being oxidized, and the test environment is ensured to meet the test requirements.

Description

Technical Field

[0001] The invention relates to the technical field of heat treatment equipment, in particular to a self-switching vacuum pumping system for an ultra-long-time hot chamber environmental mechanics testing device. Background Art

[0002] Mechanical property tests such as tensile, compression, and shear tests of materials under extended periods of time, high temperatures, and vacuum environments are widely used in industries such as mechanical metallurgy, defense and military industry, aerospace, automotive manufacturing, research institutes, universities, and quality inspection agencies. Currently, for valuable specimens or equipment requiring extended testing, there are still challenges such as insufficient vacuum levels and equipment failures that can impact the test process.

[0003] The present invention is designed with a high-temperature atmospheric furnace, a double vacuum system and a deformation measurement structure, which solves the above problems while making the test data of the sample more realistic, and the test measurement method can be flexibly selected according to the sample conditions. Summary of the Invention

[0004] In response to the deficiencies in the prior art, the present invention provides a self-switching vacuum pumping system for an ultra-long-time hot chamber environmental mechanics testing device, which solves the problem that the existing ultra-long-time testing equipment has a test vacuum degree that does not meet the requirements for valuable samples, and equipment failure affects the test process.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a self-switching vacuum pumping system for an ultra-long-duration hot chamber environmental mechanical testing device, comprising a mainframe support frame, a hot chamber environmental component, a self-switching vacuum pumping system, a vacuum component, and a water cooling system; the hot chamber environmental component mainly comprises a high-temperature resistant replaceable fixture, a dynamic sealing component, a deformation measurement chamber component, a double-layer water-cooled vacuum chamber, a temperature measurement module, a side-insertion deformation measurement component, and a non-contact measurement component; The self-switching vacuum pumping system is used to control the test pressure, and mainly includes a molecular pump support plate, a vacuum three-way pipe, a vacuum component, and a molecular pump bracket; The vacuum components mainly include electric vacuum butterfly valve, hexagon socket head screw elastic washer, flat washer, hexagon nut, O-ring, vacuum reducer elbow, ISO vacuum caliper, molecular pump, vacuum centering ring seal, metal vacuum resistance silicon tube, vacuum metal ionization silicon tube, and vacuum clamp; The flange surface of the electric vacuum butterfly valve is connected by means of an inner hexagonal cylindrical head screw elastic washer, a flat washer, and a hexagonal nut, and is sealed by an O-ring. One side is connected to a vacuum tee pipe and leads to the inside of the furnace body, and the other side is connected to a vacuum reducer elbow. An ISO vacuum caliper is used to finally connect the valve to the molecular pump. The vacuum centering ring seals the metal vacuum resistance silicon tube and the vacuum metal ionization silicon tube to the vacuum reducer elbow. The valve is sealed by a vacuum clamp. The opening and closing of the electric vacuum butterfly valve determines whether the molecular pump is connected to the furnace body, and the molecular pump is connected to an external mechanical pump.

[0006] Preferably, the mainframe support frame is a four-column structure, mainly composed of a working platform, columns, high-precision loading components, and an upper crossbeam.

[0007] Preferably, the frame structure composed of the working platform, columns and upper beams provides support for the entire device. The high-precision loading assembly is fixedly installed on the working platform and connected to the high-temperature resistant replaceable fixture on the hot chamber environment assembly. The high-precision loading assembly provides corresponding test force for the specimen.

[0008] Preferably, the high-temperature resistant replaceable fixture is connected to the dynamic sealing assembly. Since the high-temperature resistant replaceable fixture is a movable part, the dynamic sealing assembly designed at the connection can ensure that the airtightness of the hot chamber environment assembly is not affected. The lower end of the high-temperature resistant replaceable fixture is fixedly connected to the high-precision loading assembly.

[0009] Preferably, the dynamic sealing assembly is fixedly mounted on the deformation measuring chamber assembly, and the side-insertion deformation measuring assembly and the non-contact measuring assembly of the deformation measuring chamber assembly are both fixedly mounted on the double-layer water-cooled vacuum chamber. The side-insertion deformation measuring assembly contains a side-insertion deformation measuring extensometer, which is fixed in the water-cooling chamber of the double-layer water-cooled vacuum chamber. The non-contact measuring assembly observes and measures the deformation of the specimen through a window reserved on the double-layer water-cooled vacuum chamber, and a temperature measurement module is fixedly mounted on the double-layer water-cooled vacuum chamber.

[0010] Preferably, the vacuum system consists of a mechanical pump, a molecular pump, vacuum piping, a high-vacuum butterfly valve, and vacuum measuring instruments. The system is automatically controlled using a PLC program, automatically switching between the two systems based on the real-time operating status. The number of vacuum systems can be flexibly selected; using two sets of vacuum systems can achieve a higher vacuum level within the double-layer water-cooled vacuum chamber, resulting in better vacuuming results.

[0011] Preferably, the water cooling system consists of a cooling water pipeline, a water distribution device and a water cooler. The water distribution device is installed on the double-layer water-cooled vacuum chamber bracket. The water distribution device distributes the water of the water cooler to each water cooling pipe through the main inlet of the water distributor, and the flow of each water can be adjusted. The water cooler is used to cool the test device to ensure that the shell temperature of the double-layer water-cooled vacuum chamber is lower than ℃. A copper ball valve is left on each water interface of the water distribution, and the water pipe leading out of the water distribution device is connected to the double-layer water-cooled vacuum chamber.

[0012] The present invention provides a self-switching vacuum pumping system for an ultra-long-time hot chamber environmental mechanics testing device. It has the following beneficial effects: 1. The present invention is designed with two groups of vacuum pipelines. One group can be selected for work during the test. If a problem is detected in the vacuum pipeline of the working group, the system will automatically switch to the standby group. This can effectively prevent the oxidation of the sample and ensure that the test environment meets the test requirements.

[0013] 2. The present invention can choose to use one or two sets of vacuum pipes according to actual test technical indicators, which is more flexible, and the vacuuming effect is better when two sets of vacuum pipes are used.

[0014] 3. The present invention can flexibly select three measurement methods for the sample, namely: contact measurement, non-contact measurement, and contact measurement and non-contact measurement at the same time.

[0015] 4. The present invention provides more comprehensive protection for valuable samples or long-term tests, effectively avoiding the impact of vacuum problems on the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A perspective view of the present invention; Figure 2 This is a schematic diagram of the front view of the hot chamber environment component of the present invention; Figure 3 It is a schematic side view of the structure of the hot chamber environment component of the present invention; Figure 4 This is a schematic structural diagram of the self-switching vacuum pumping system of the present invention; Figure 5 This is a schematic diagram of the vacuum component structure of the present invention; Figure 6 This is a self-switching flow chart of the self-switching vacuum pumping system of the present invention.

[0017] Among them: 1. Mainframe support frame; 1.1. Working platform; 1.2. Column; 1.3. High-precision loading assembly; 1.4. Upper crossbeam; 2. Hot chamber environment assembly; 2.1. High-temperature resistant interchangeable fixture; 2.2. Dynamic seal assembly; 2.3. Deformation measurement chamber assembly; 2.4. Double-layer water-cooled vacuum chamber; 2.5. Temperature measurement module; 2.6. Side-insertion deformation measurement assembly; 2.7. Non-contact measurement assembly; 3. Self-switching vacuum system; 3.1. Molecular pump support plate; 3.2 , vacuum tee pipe; 3.4, molecular pump bracket; 4, vacuum components; 4.1, electric vacuum butterfly valve; 4.2, hexagon socket head screw; 4.3, elastic washer; 4.4, flat washer; 4.5, hexagonal nut; 4.6, O-ring; 4.7, vacuum reducer elbow; 4.8, ISO vacuum caliper; 4.9, molecular pump; 4.10, vacuum centering ring seal; 4.11, metal vacuum resistor silicon tube; 4.12, vacuum metal ionization silicon tube; 4.13, vacuum clamp. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the present specification. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] Example: Please see the attached Figure 1 -Attached Figure 6 The embodiment of the present invention provides a self-switching vacuum pumping system for an ultra-long-time hot chamber environmental mechanical testing device, comprising: a mainframe support frame 1, a hot chamber environmental component 2, a self-switching vacuum pumping system 3, a vacuum component 4, and a water cooling system; The main machine support frame 1 is a four-column structure, mainly composed of a working platform 1.1, columns 1.2, high-precision loading components 1.3, upper crossbeam 1.4 and other parts.

[0020] The framework structure consisting of the working platform 1.1, columns 1.2, and upper crossbeam 1.4 provides support for the entire device. The high-precision loading assembly 1.3 is fixedly installed on the working platform 1.1 and connected to the high-temperature resistant replaceable fixture 2.1 on the hot chamber environment assembly 2. The high-precision loading assembly 1.3 provides the corresponding test force for the specimen.

[0021] The hot chamber environment component 2 mainly consists of a high-temperature resistant replaceable fixture 2.1, a dynamic sealing component 2.2, a deformation measurement chamber component 2.3, a double-layer water-cooled vacuum chamber 2.4, a temperature measurement module 2.5, a side-insertion deformation measurement component 2.6, and a non-contact measurement component 2.7.

[0022] The high-temperature replaceable fixture 2.1 is connected to the dynamic seal assembly 2.2. Because the high-temperature replaceable fixture 2.1 is a movable component, the dynamic seal assembly 2.2 designed at the connection ensures the airtightness of the hot chamber environment assembly 2 is not affected. The lower end of the high-temperature replaceable fixture 2.1 is fixedly connected to the high-precision loading assembly 1.3, providing precise loading force to the specimen.

[0023] The dynamic sealing assembly 2.2 is fixedly mounted on the deformation measuring chamber assembly 2.3, and the deformation measuring chamber assembly 2.3, the side-insertion deformation measuring assembly 2.6, and the non-contact measuring assembly 2.7 are all fixedly mounted on the double-layer water-cooled vacuum chamber 2.4. The side-insertion deformation measuring assembly 2.6 contains a side-insertion deformation measuring extensometer, which is fixed in the water-cooling chamber of the double-layer water-cooled vacuum chamber 2.4. The non-contact measuring assembly 2.7 can observe and measure the deformation of the specimen through the window reserved on the double-layer water-cooled vacuum chamber 2.4. During the test, the present invention can flexibly select the deformation measuring chamber assembly 2.3, the side-insertion deformation measuring assembly 2.6, and the non-contact measuring assembly 2.7 to measure the deformation of the specimen according to the actual test situation. A temperature measurement module 2.5 is fixedly mounted on the double-layer water-cooled vacuum chamber 2.4 to collect the temperature of the specimen.

[0024] The self-switching vacuum pumping system 3 is used to control the test pressure, and mainly comprises a molecular pump support plate 3.1, a vacuum three-way pipe 3.2, a vacuum component 4, and a molecular pump bracket 3.4.

[0025] The vacuum assembly 4 mainly comprises an electric vacuum butterfly valve 4.1, a hexagon socket head screw 4.2, an elastic washer 4.3, a flat washer 4.4, a hexagonal nut 4.5, an O-ring 4.6, a vacuum reducer 4.7, an ISO vacuum caliper 4.8, a molecular pump 4.9, a vacuum centering ring seal 4.10, a metal vacuum resistance silicon tube 4.11, a vacuum metal ionization silicon tube 4.12, and a vacuum clamp 4.13.

[0026] The flange surface of electric vacuum butterfly valve 4.1 is connected by hexagon socket head screw 4.2, elastic washer 4.3, flat washer 4.4, and hexagonal nut 4.5, and sealed by O-ring 4.6. One side is connected to vacuum tee pipe 3.2 and leads to the interior of the furnace body, and the other side is connected to vacuum reducer 4.7. It is finally connected to molecular pump 4.9 using ISO vacuum caliper 4.8. It is connected to vacuum reducer 4.7 by vacuum centering ring seal 4.10, metal vacuum resistance silicon tube 4.11, and vacuum metal ionization silicon tube 4.12, and sealed by vacuum clamp 4.13.

[0027] The opening and closing of electric vacuum butterfly valve 4.1 determines whether molecular pump 4.9 is connected to the furnace. Molecular pump 4.9 is connected to an external mechanical pump. During operation, the mechanical pump is first turned on. The vacuum level inside the pipeline is determined by metal vacuum resistor silicon tube 4.11 and vacuum metal ionization silicon tube 4.12. Once the vacuum level drops to a specified value, molecular pump 4.9 is turned on, further reducing the pressure inside the furnace to achieve a high vacuum state. During testing, the number of active vacuum circuits can be flexibly adjusted. Using two vacuum circuits simultaneously can meet higher vacuum requirements.

[0028] The water cooling system consists of cooling water piping, a water distribution device, and a water chiller. The water distribution device is mounted on the bracket of the double-layer water-cooled vacuum chamber 2.4. It distributes water from the water chiller through the main inlet of the manifold to each cooling pipe, with adjustable flow rates for each pipe. The water chiller cools the test device and ensures the shell temperature of the double-layer water-cooled vacuum chamber 2.4 remains below 30°C. Each water connection of the water distribution device is equipped with a copper ball valve. The water pipes from the water distribution device are connected to the double-layer water-cooled vacuum chamber 2.4 and other pipes.

[0029] During the test, the system uses PLC program for automatic control, and automatically judges the real-time working status of the two systems. That is, when one system fails, it automatically switches to the other system to ensure that the system continues to work stably without stopping; Take the failure of vacuum system 1 as an example. When the failure of vacuum system 2 occurs, similarly, there are two situations: Figure 3 : Plan A: If mechanical pump 1 fails, mechanical pump 1 and molecular pump 1 will stop working one by one, high vacuum butterfly valve 1 will be closed, mechanical pump 2 will be started, high vacuum butterfly valve 2 will remain closed, the system will determine that the vacuum degree in the pipeline of vacuum system 2 is less than or equal to the specified value, and after maintaining it for a certain period of time, high vacuum butterfly valve 2 will open, the system will again determine that the vacuum degree in the pipeline of vacuum system 2 is less than or equal to the specified value, and after maintaining it for a certain period of time, molecular pump 2 will be started. From then on, the entire vacuum system 1 will be closed, and vacuum system 2 will be used to work; Plan B: If molecular pump 1 fails, it stops and mechanical pump 2 starts. Mechanical pump 1 remains started, high vacuum butterfly valve 1 remains open, and high vacuum butterfly valve 2 remains closed. The system determines that the vacuum level in the vacuum system 2 pipeline is less than or equal to the specified value and maintains this value for a specified period. Then, molecular pump 2 starts. The system again determines that the vacuum level in the vacuum system 2 pipeline is less than or equal to that of vacuum system 1. High vacuum butterfly valve 1 closes, high vacuum butterfly valve 2 opens, and mechanical pump 1 stops. From then on, vacuum system 1 is completely shut down, and vacuum system 2 operates. This method effectively prevents air trapped in the pipeline from affecting the vacuum level in double-layer water-cooled vacuum chamber 2.4, ensuring test stability and data accuracy. It also protects long-term tests or valuable specimens. The self-switching vacuum system 3 automatically switches the vacuum system. After switching, the faulty component is removed for repair and then reinstalled, without affecting the test.

[0030] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A self-switching vacuum pumping system for an ultra-long-time hot chamber environmental mechanics test device, characterized in that: It comprises a mainframe support frame (1), a hot chamber environment component (2), a self-switching vacuum pumping system (3), a vacuum component (4) and a water cooling system; the hot chamber environment component (2) mainly comprises a high-temperature resistant replaceable fixture (2.1), a dynamic sealing component (2.2), a deformation measurement chamber component (2.3), a double-layer water-cooled vacuum chamber (2.4), a temperature measurement module (2.5), a side-insertion deformation measurement component (2.6), and a non-contact measurement component (2.7); The self-switching vacuum pumping system (3) is used to control the test pressure, and mainly comprises a molecular pump support plate (3.1), a vacuum three-way pipe (3.2), a vacuum component (4), and a molecular pump bracket (3.4); The vacuum assembly (4) mainly includes an electric vacuum butterfly valve (4.1), a hexagon socket head screw (4.2), an elastic washer (4.3), a flat washer (4.4), a hexagonal nut (4.5), an O-ring (4.6), a vacuum reducer elbow (4.7), an ISO vacuum caliper (4.8), a molecular pump (4.9), a vacuum centering ring seal (4.10), a metal vacuum resistance silicon tube (4.11), a vacuum metal ionization silicon tube (4.12), and a vacuum clamp (4.13); The flange surface of the electric vacuum butterfly valve (4.1) is connected by means of a hexagon socket head screw (4.2), an elastic washer (4.3), a flat washer (4.4), and a hexagonal nut (4.5), and is sealed by means of an O-ring (4.6). One side is connected to a vacuum three-way pipe (3.2) and leads to the interior of the furnace body, and the other side is connected to a vacuum reducer elbow (4.7). An ISO vacuum caliper (4.8) is used to finally connect the valve to a molecular pump (4.9). A metal vacuum resistance silicon tube (4.11) and a vacuum metal ionization silicon tube (4.12) are connected to the vacuum reducer elbow (4.7) by means of a vacuum centering ring seal (4.10). The valve is sealed by means of a vacuum clamp (4.13). The opening and closing of the electric vacuum butterfly valve (4.1) determines whether the molecular pump (4.9) is connected to the furnace body. The molecular pump (4.9) is connected to an external mechanical pump.

2. The self-switching vacuum pumping system of the ultra-long-time hot chamber environmental mechanics testing device according to claim 1 is characterized in that: The mainframe support frame (1) is a four-column structure, mainly consisting of a working platform (1.1), columns (1.2), a high-precision loading component (1.3), and an upper crossbeam (1.4).

3. The self-switching vacuum pumping system of the ultra-long-time hot chamber environmental mechanics testing device according to claim 2 is characterized in that: The frame structure composed of the working platform (1.1), the columns (1.2), and the upper crossbeam (1.4) provides support for the entire device. The high-precision loading component (1.3) is fixedly installed on the working platform (1.1) and is connected to the high-temperature resistant replaceable fixture (2.1) on the hot chamber environment component (2). The high-precision loading component (1.3) provides a corresponding test force for the specimen.

4. The self-switching vacuum pumping system of the ultra-long-time hot chamber environmental mechanics testing device according to claim 1 is characterized in that: The high-temperature resistant replaceable fixture (2.1) is connected to the dynamic sealing component (2.2). Since the high-temperature resistant replaceable fixture (2.1) is a movable component, the dynamic sealing component (2.2) designed at the connection can ensure that the airtightness of the hot chamber environment component (2) is not affected. The lower end of the high-temperature resistant replaceable fixture (2.1) is fixedly connected to the high-precision loading component (1.3).

5. The self-switching vacuum pumping system of the ultra-long-time hot chamber environmental mechanics testing device according to claim 1 is characterized in that: The dynamic sealing assembly (2.2) is fixedly mounted on the deformation measuring chamber assembly (2.3). The deformation measuring chamber assembly (2.3), the side-insertion deformation measuring assembly (2.6), and the non-contact measuring assembly (2.7) are all fixedly mounted on the double-layer water-cooled vacuum chamber (2.4). The side-insertion deformation measuring assembly (2.6) contains a side-insertion deformation measuring extensometer, which is fixed in the water-cooling chamber of the double-layer water-cooled vacuum chamber (2.4). The non-contact measuring assembly (2.7) observes and measures the deformation of the specimen through a window reserved on the double-layer water-cooled vacuum chamber (2.4). A temperature measuring module (2.5) is fixedly mounted on the double-layer water-cooled vacuum chamber (2.4).

6. The self-switching vacuum pumping system of the ultra-long-time hot chamber environmental mechanics testing device according to claim 1 is characterized in that: The water cooling system is composed of a cooling water pipeline, a water distribution device and a water cooler. The water distribution device is installed on the bracket of the double-layer water-cooled vacuum chamber (2.4). The water distribution device distributes the water of the water cooler to each water cooling pipe through the main inlet of the water distributor, and the flow rate of each water is adjustable. The water cooler is used to cool the test device to ensure that the shell temperature of the double-layer water-cooled vacuum chamber (2.4) is lower than 30°C. A copper ball valve is left on each water interface of the water distribution device, and the water pipe leading out of the water distribution device is connected to the double-layer water-cooled vacuum chamber (2.4).

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