A vacuum high-voltage ignition test tank and its test method

Abstract

The present invention discloses a vacuum high-voltage sparking test tank and a test method thereof, which includes a vacuum tank body and an air intake regulating device assembled on the vacuum tank body; a tank flange is welded to the bottom of the vacuum tank body, and a measured power supply interface is provided at the top of the vacuum tank body; a vacuum pumping pipeline is connected to the side wall of the vacuum tank body; the air intake regulating device is assembled on the tank flange, and the air intake regulating device includes a tank adapter flange for sealing and fixedly connecting with the tank flange, a screw rod seat with one end sleeved inside the tank adapter flange and sealingly connected with the tank adapter flange, a screw rod threadedly connected inside the screw rod seat, and a magnet driving assembly for adjusting the position of the screw rod, and the screw rod seat is fixedly connected with the tank adapter flange through a fixing member. The present invention can precisely adjust the position of the air outlet point in the vacuum tank body during the working process, improving the working efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of vacuum ignition, and particularly to a vacuum high-voltage ignition test tank with dynamically adjustable air intake position and its test method. Background Art

[0002] When testing the high-voltage electrical ignition performance, a high-voltage electrical device is assembled in a vacuum tank, and gas is introduced into the vacuum tank through an air intake device to locally destroy the vacuum degree. The introduced gas serves as a carrier to create ignition conditions. However, in the experiment, the ignition position and the air intake point must be manually adjusted every time, which requires a process: experiment → result → expose the vacuum → open the vacuum tank body to adjust the vacuum exposure point → adjust the position of the nearest metal → close the vacuum tank body → evacuate the air → experiment. Since the evacuation speed takes 20 minutes, the single adjustment time requires more than half an hour, wasting manpower and material resources. Summary of the Invention

[0003] The purpose of the present invention is to solve the problem that the air intake position in the vacuum tank is inconvenient to adjust in the prior art, and to provide a vacuum high-voltage ignition test tank with dynamically adjustable air intake position.

[0004] Another purpose of the present invention is to provide a test method for the air intake position in the vacuum tank.

[0005] The technical solution adopted to achieve the purpose of the present invention is as follows:

[0006] A vacuum high-voltage ignition test tank includes a vacuum tank body and an air intake adjustment device assembled on the vacuum tank body;

[0007] A tank flange is welded to the bottom of the vacuum tank body, and a measured power supply interface is provided at the top of the vacuum tank body; a vacuum evacuation pipeline is connected to the side wall of the vacuum tank body;

[0008] The air intake adjustment device is assembled on the tank flange. The air intake adjustment device includes a tank adapter flange for sealing and fixedly connecting with the tank flange, a screw seat with one end sleeved inside the tank adapter flange and sealingly connected with the tank adapter flange, a screw threadedly connected inside the screw seat, and a magnet drive assembly for adjusting the position of the screw. The screw seat is fixedly connected to the tank adapter flange through a fixing member, wherein:

[0009] The screw is hollow inside. One end of the screw extends into the vacuum tank body to form a gas outlet, and the other end is inserted into the screw seat and forms a threaded connection with the internal thread of the screw seat. A sliding sealing ring is embedded at the end of the screw seat to seal the screw. An air intake passage is formed at the outer end of the screw seat, and the air intake passage is communicated with the hollow channel inside the screw;

[0010] The magnet driving assembly includes a first magnet block fixed on the screw and a second magnet block adsorbed outside the tank adapter flange. The first magnet block and the second magnet block are arranged oppositely inside and outside to form a follower.

[0011] In the above technical solution, the gas outlet of the screw is a narrow hole formed at the end of the screw.

[0012] In the above technical solution, a tool contact surface is provided on the side wall of the screw near the gas outlet.

[0013] In the above technical solution, a static sealing ring is embedded on the outer flange of the screw seat to press the outer flange of the tank adapter flange to form a seal.

[0014] In the above technical solution, the first magnet block is fixed on one side of the edge of the screw with a metal adhesive, and the second magnet block is placed outside the tank adapter flange.

[0015] In the above technical solution, the tank adapter flange, the screw seat and the screw are coaxially arranged.

[0016] In the above technical solution, an embedding groove is provided in the screw seat, and the static sealing ring is assembled in the embedding groove.

[0017] In the above technical solution, the hollow channel in the screw seat is a stepped channel, and the internal thread is formed in the smallest diameter section of the stepped channel.

[0018] In the above technical solution, the end of the screw seat is the connection end of the intake pipe section for connecting an external pipeline.

[0019] In the above technical solution, the fixing member is a clamp, and the screw seat and the tank adapter flange are fixedly connected through the clamp.

[0020] In the above technical solution, the screw seat is provided with a standard KF25, KF40 or KF16 interface to dock with the tank adapter flange. The static sealing ring is a KF25, KF40 or KF16 flange static sealing ring; the structural form of the tank flange is one of the CF / LF / KF flange forms. The tank adapter flange and the tank flange are hermetically welded into a whole and fixed under the tank.

[0021] On the other hand of the present invention, the test method of the vacuum high-voltage spark test tank includes the following steps:

[0022] Positioning method: The tank adapter flange is welded to the tank flange of the vacuum tank. The screw seat and the screw are pre-assembled into an integral structure in a threaded form. The pre-assembled integral structure is inserted into the tank adapter flange, and the screw seat is fixed to the tank adapter flange by using the fixing member;

[0023] Outlet adjustment method: Gas is introduced through the air inlet passage of the screw base, passes through the hollow channel of the screw, enters the vacuum tank from the gas outlet of the screw, and locally exposes the vacuum. When the second magnet block is rotated outside the screw base, the first magnet block rotates with it, driving the screw to rotate within the screw base. At the same time, the screw performs a linear motion in the axial direction. While the screw advances and retreats, the position of the gas outlet within the vacuum tank is adjusted;

[0024] Testing method: The power supply interface to be tested is used to connect the power supply to be tested and the device to be tested. The vacuum tank is evacuated through the vacuum pipeline, gas is introduced into the vacuum tank through the dynamically adjustable vacuum sparking air inlet device for sparking tests. The position of the gas outlet can be adjusted through the outlet adjustment method to conduct sparking tests under different gas outlet position conditions. Additionally, by controlling the gas inlet flow rate, sparking tests under different gas flow rate conditions can be carried out.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] 1. The sealing performance between the air inlet adjustment device and the vacuum tank is good, facilitating assembly. Without opening the vacuum tank and destroying the vacuum environment, the position of the gas outlet within the vacuum tank can be adjusted through the air inlet adjustment device, which is convenient and fast, greatly improving work efficiency.

[0027] 2. The air inlet adjustment device has good mechanical properties, guiding properties, and sealing properties;

[0028] Mechanical properties:

[0029] During the entire testing of the sparking device, the vacuum degree within the test tank can reach 1×10 -4 Pa. In order to dynamically adjust the sparking discharge position without affecting the vacuum degree, the present invention uses a strong magnet as the traction force for the screw rotation, and uses the second magnet block outside the vacuum tank and the first magnet block on the internal screw for traction, so that the screw moves along the screw axis to adjust the air inlet position at any time during operation, realizing the adjustment of the air inlet position at any time in the working state of the vacuum tank without exposing to the air, thereby reducing the time consumed for single adjustment and improving the testing efficiency;

[0030] Guiding properties: Due to the fastening effect of the threaded connection and the sliding sealing ring, under the condition of ensuring the machining accuracy, the present invention can ensure the micro displacement in the radial direction of the screw, precisely adjusting the position of the local sparking area. The smaller the pitch of the thread, the more precise the position of the axial movement. The specific relative displacement can be known by using the pitch size of the screw machining and the number of turns of the magnet rotation, thereby accurately calculating the sparking discharge position and realizing the precise adjustment of the air inlet position.

[0031] Sealing performance: The sliding sealing ring is located inside the vacuum, so there is no possibility of external leakage. The sliding sealing ring ensures that when the height of the dynamic adjustment screw is adjusted, there is a unique air outlet for the incoming gas, so as to ensure the change of the vacuum degree in a specific local area of the effective vacuum tank body. The overall adjustment mechanism is within the sealing point, which is convenient for the assembly and sealing of each component. Description of the Drawings

[0032] Figure 1 It is a schematic structural diagram of a vacuum high-voltage spark test tank (the first magnet block and the second magnet block are omitted).

[0033] Figure 2 It is a schematic assembly structural diagram of the air intake adjustment device.

[0034] Figure 3 It is a schematic unassembled structural diagram of the air intake adjustment device.

[0035] Figure 4 It is a front view of the air intake adjustment device.

[0036] Figure 5 It is a schematic connection structural diagram of the air intake adjustment device and the tank flange.

[0037] Figure 6 It is a top view of the vacuum tank body.

[0038] In the figure: 1 - tank flange, 2 - tank adapter flange, 3-1 - first magnet block, 3-2 - second magnet block, 4 - sliding sealing ring, 5 - static sealing ring, 6 - screw seat, 7 - screw, 8 - vacuum tank body, 9 - measured power supply interface, 10 - vacuum pumping pipeline.

[0039] 6-1 - air intake passage, 6-2 - connecting end of the intake pipe section, 7-1 - gas outlet, 7-2 - tool contact surface. Specific Embodiments

[0040] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0041] Embodiment 1

[0042] A vacuum high-voltage spark test tank includes a vacuum tank body 8 and an air intake adjustment device assembled on the vacuum tank body 8;

[0043] The bottom of the vacuum tank body is welded with a tank flange 1, and the top of the vacuum tank body is provided with a measured power supply interface 9; a vacuum pumping pipeline 10 is connected to the side wall of the vacuum tank body;

[0044] The intake air regulating device is assembled on the tank flange 1. The intake air regulating device includes a tank adapter flange 2 for sealing and fixedly connecting with the tank flange 1, a screw seat 6 with one end sleeved inside the tank adapter flange 2 and capable of forming a sealed and fixed connection with the tank adapter flange 2, a screw 7 threadedly connected inside the screw seat 6, and a magnet driving assembly for adjusting the position of the screw 7, wherein:

[0045] The screw 7 is hollow inside. One end of the screw 7 extends into the vacuum tank to form a gas outlet 7-1, and the other end is inserted into the screw seat 6 and threadedly connected with the internal thread of the screw seat 6. A sliding sealing ring 4 is embedded at the end of the screw seat 6 to seal the screw 7. An air intake passage 6-1 is formed at the outer end of the screw seat 6, and the air intake passage is communicated with the hollow passage inside the screw 7;

[0046] The magnet driving assembly includes a first magnet block 3-1 fixed on the screw 7 and a second magnet block 3-2 adsorbed outside the tank adapter flange 2. The first magnet block 3-1 and the second magnet block 3-2 are arranged oppositely inside and outside to form a follow-up.

[0047] Embodiment 2

[0048] The testing method of the vacuum high-voltage sparking test tank as described in Embodiment 1 includes the following steps:

[0049] Positioning method: The tank adapter flange 2 is welded to the tank flange 1 of the vacuum tank. During use, silicone grease or fluorine grease is applied at the position of the sliding sealing ring 4 to reduce friction. The screw seat 6 and the screw 7 are pre-assembled into an integral structure in a threaded form, the pre-assembled integral structure is inserted into the tank adapter flange 2, and the screw seat 6 is fixed on the tank adapter flange 2;

[0050] Air outlet adjusting method: Gas is introduced through the air intake passage of the screw seat 6, passes through the hollow passage of the screw 7, and enters the vacuum tank from the gas outlet 7-1 of the screw 7 to locally expose the vacuum. When the second magnet block 3-2 is rotated outside the screw seat 6, the first magnet block 3-1 rotates with it, driving the screw 7 to rotate inside the screw seat 6. At the same time, the screw 7 performs a linear motion in the axial direction. While the screw 7 advances and retreats, the position of the gas outlet 7-1 in the vacuum tank is adjusted.

[0051] Testing method: The power supply interface to be tested is used to connect the power supply to be tested and the device to be tested. The vacuum tank is evacuated through a vacuum pumping pipeline, gas is introduced into the vacuum tank through a dynamically adjustable vacuum sparking air intake device for sparking testing. The position of the gas outlet can be adjusted through the air outlet adjusting method to conduct sparking tests under different gas outlet position conditions. In addition, by controlling the flow rate of the gas entering, sparking tests under different gas flow rate conditions are conducted.

[0052] Example 3

[0053] Preferably, the power supply interface 9 to be measured is a blind plate that can be matched with a quick-insert power supply. An O-ring is embedded in the blind plate, and the power supply interface 9 to be measured can be covered with the blind plate to prevent dust from falling.

[0054] Preferably, the gas outlet 7-1 of the screw 7 is a narrow hole formed at the end of the screw 7. A tool contact surface 7-2 is provided on the side wall of the screw 7 near the gas outlet 7-1, which is convenient for assembling the screw 7 using tools.

[0055] Preferably, a static sealing ring 5 is embedded on the outer flange of the screw base 6 to press the outer flange of the tank body adapter flange 2 to form a seal. When the integrated structure is inserted into the tank body adapter flange 2, a seal is formed between the screw base 6 and the tank body adapter flange 2 under the action of the static sealing ring 5.

[0056] Preferably, the first magnet block 3-1 is fixed to one side of the edge of the screw 7 with a metal adhesive, and the second magnet block 3-2 is placed outside the tank body adapter flange 2. They attract each other, and the second magnet block 3-2 can drive the first magnet block 3-1 to rotate. The circumferential motion outside the vacuum is converted into the axial motion of the screw 7 by using the threaded connection method of the screw 7 and the screw base 6.

[0057] Preferably, the tank body adapter flange 2, the screw base 6, and the screw 7 are coaxially arranged, which is convenient for assembly and improves the sealing degree.

[0058] Preferably, an embedding groove is provided in the screw base 6, and the static sealing ring 5 is assembled in the embedding groove.

[0059] Preferably, the hollow channel in the screw base 6 is a stepped channel, and the internal thread is formed in the smallest diameter section 6-3 of the stepped channel, which has the function of preventing jamming.

[0060] Preferably, the end of the screw base 6 is an inlet pipe section connection end 6-2 for connecting an external pipeline.

[0061] Preferably, the screw base 6 and the tank body adapter flange 2 are fixedly connected by a clamp. Further, the outer flange of the screw base 6 and the outer flange of the tank body adapter flange 2 are fixed together by a clamp (stainless steel ferrule), and the clamp is omitted in the figure.

[0062] Preferably, the screw base 6 is provided with standard KF25, KF40, or KF16 interfaces to dock with the tank body adapter flange 2.

[0063] Preferably, the static sealing ring 5 is a KF25, KF40 or KF16 flange static sealing ring, which is convenient for sealing with the tank transfer flange 2.

[0064] Preferably, the structural form of the tank flange 1 is one of the CF / LF / KF flange forms. The tank transfer flange 2 and the tank flange 1 are integrally formed by sealed welding and fixed under the tank.

[0065] For ease of explanation, spatial relative terms such as "upper", "lower", "left", "right" etc. are used in the embodiments to describe the relationship of one element or feature shown in the drawings to another element or feature. It should be understood that, in addition to the orientation shown in the drawings, the spatial terms are intended to cover different orientations during the use or operation of the device. For example, if the device in the drawings is inverted, the element described as being "below" other elements or features will be positioned "above" the other elements or features. Thus, the exemplary term "lower" can encompass both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein can be interpreted accordingly.

[0066] Moreover, relational terms such as "first" and "second" are only used to distinguish one component with the same name from another, and do not necessarily require or imply any actual relationship or order between these components.

[0067] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, several improvements can be made without departing from the principle of the present invention, and these improvements should also be regarded as the protection scope of the present invention.

Claims

1. A vacuum high-voltage sparking test tank, characterized in that, It includes a vacuum tank body and an intake air regulating device assembled on the vacuum tank body; A tank flange is welded to the bottom of the vacuum tank body, and a measured power supply interface is provided at the top of the vacuum tank body; a vacuum pumping pipeline is connected to the side wall of the vacuum tank body; The intake air regulating device is assembled on the tank flange. The intake air regulating device includes a tank adapter flange for sealing and fixedly connecting with the tank flange, a screw seat with one end sleeved inside the tank adapter flange and sealingly connected with the tank adapter flange, a screw threadedly connected inside the screw seat, and a magnet driving component for adjusting the position of the screw. The screw seat is fixedly connected with the tank adapter flange through a fixing member, wherein: The screw is hollow inside. One end of the screw extends into the vacuum tank body to form a gas outlet, and the other end is inserted into the screw seat and threadedly connected with the internal thread of the screw seat. A sliding sealing ring is embedded at the end of the screw seat to seal the screw. An intake air passage is formed at the outer end of the screw seat, and the intake air passage is communicated with the hollow channel inside the screw; The magnet driving component includes a first magnet block fixed on the screw and a second magnet block adsorbed outside the tank adapter flange. The first magnet block and the second magnet block are arranged oppositely inside and outside to form a follow-up.

2. The vacuum high-voltage sparking test tank according to claim 1, characterized in that, The gas outlet of the screw is a narrow hole formed at the end of the screw.

3. The vacuum high-voltage sparking test tank according to claim 1, characterized in that, A tool contact surface is provided at a position on the side wall of the screw close to the gas outlet.

4. The vacuum high-voltage sparking test tank according to claim 1, characterized in that, A static sealing ring is embedded on the outer flange of the screw seat to press the outer flange of the tank adapter flange to form a seal.

5. The vacuum high-voltage sparking test tank according to claim 1, characterized in that, The first magnet block is fixed on one side of the edge of the screw with a metal bonding agent, and the second magnet block is placed outside the tank adapter flange.

6. The vacuum high-voltage sparking test tank according to claim 1, characterized in that, The tank adapter flange, the screw seat and the screw are coaxially arranged.

7. The vacuum high-voltage sparking test tank according to claim 4, characterized in that, An embedding groove is provided inside the screw seat, and the static sealing ring is assembled in the embedding groove.

8. The vacuum high-voltage sparking test tank according to claim 1, characterized in that, The hollow channel inside the screw seat is a stepped channel, and the internal thread is formed in the smallest diameter section of the stepped channel.

9. The vacuum high-voltage sparking test tank according to claim 1, characterized in that, The end of the screw seat is a connection end for an intake pipe section to connect an external pipeline.

10. The vacuum high-voltage sparking test tank according to claim 1, characterized in that, The fixing member is a clamp, and the screw seat and the tank adapter flange are fixedly connected through the clamp.

11. The vacuum high-voltage sparking test tank according to claim 4, characterized in that, The screw seat is provided with a standard KF25, KF40 or KF16 interface for docking with the tank adapter flange. The static sealing ring is a KF25, KF40 or KF16 flange static sealing ring; the structural form of the tank flange is one of the CF / LF / KF flange forms.

12. A test method for the vacuum high-voltage sparking test tank according to any one of claims 1-11, characterized in that, It includes the following steps: Positioning method: The tank adapter flange is welded to the tank flange of the vacuum tank body. The screw seat and the screw are pre-assembled into an integral structure in a threaded form. The pre-assembled integral structure is inserted into the tank adapter flange, and the screw seat is fixed to the tank adapter flange by using the fixing member; Outlet adjustment method: Gas is introduced through the intake passage of the screw base, passes through the hollow channel of the screw, enters the vacuum tank from the gas outlet of the screw, and locally exposes to vacuum. When the second magnet block is rotated outside the screw base, the first magnet block rotates with it, driving the screw to rotate within the screw base. At the same time, the screw performs a linear motion in the axial direction. While the screw advances and retreats, the position of the gas outlet within the vacuum tank is adjusted; Testing method: The power supply interface under test is used to connect the power supply under test and the device under test. The vacuum tank is evacuated through the vacuum pumping pipeline, and gas is introduced into the vacuum tank through the dynamically adjustable vacuum ignition intake device for ignition testing. The position of the gas outlet can be adjusted through the outlet adjustment method to conduct ignition tests under different gas outlet position conditions. Additionally, by controlling the gas inlet flow rate, ignition tests under different gas flow rate conditions can be conducted.

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