An air return system for the operating room of a shielded room for a helium leak detection device

Abstract

The present invention relates to the technical field of air reflux, and discloses an air reflux system for a shielded room operating room for a helium leak detection device, comprising a fixed bottom plate, a reflux control mechanism is arranged at the top of the fixed bottom plate, a connection sealing mechanism is arranged inside the reflux control mechanism, the connection sealing mechanism is used to ensure the air tightness of the connection node in the reflux control mechanism, the reflux control mechanism cooperates with the connection sealing mechanism to enable the air transported by the helium leak detection device to reflux into the shielded room through the shielded room operating room and to prevent the helium leakage in the helium leak detection device from causing damage to the health of the personnel in the shielded room operating room, and the outer surface of the reflux control mechanism is provided with a supporting assembly. The present invention not only ensures that the air transported by the helium leak detection device refluxes into the shielded room through the shielded room operating room and can prevent the helium leakage in the helium leak detection device from causing damage to the health of the personnel in the shielded room operating room, but also ensures the air tightness of its connection node.

Description

Technical Field

[0001] The invention relates to the technical field of air reflow, in particular to an air reflow system for an operating room of a shielding room used for a helium-filled leak detection device. Background Art

[0002] The helium leak detection device uses helium as a tracer gas. Helium is filled into the workpiece in the vacuum box of the helium leak detection device. Then the helium leak detector can accurately and quickly determine the leakage of the workpiece. An air return system is required when the air in the helium leak detection device is transported to the shielding room.

[0003] In the current air return system for the shielded room operating room of a helium-filled leak detection device, when the air transported into the shielded room operating room is transported into the shielded room during the use of the helium-filled leak detection device, there is helium leakage in the helium-filled leak detection device, which causes damage to the health of personnel in the shielded room operating room. Therefore, we propose an air return system for the shielded room operating room of a helium-filled leak detection device. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the shortcomings of the prior art, the present invention provides an air return system for a shielded room operating room for a helium leak detection device, which has the advantages of not only ensuring that the air transported by the helium leak detection device returns to the shielded room through the shielded room operating room and preventing helium leakage in the helium leak detection device from causing harm to the health of personnel in the shielded room operating room, but also ensuring the air tightness of its connection nodes, thereby solving the problem that helium leakage in the helium leak detection device causes harm to the health of personnel in the shielded room operating room.

[0006] (II) Technical solution

[0007] In order to achieve the above purpose of not only ensuring that the air transported by the helium leak detection device flows back into the shielded room through the shielded room operation room and preventing the helium leakage in the helium leak detection device from causing damage to the health of personnel in the shielded room operation room, but also ensuring the air tightness of its connection nodes, the present invention provides the following technical solutions: an air return system for the shielded room operation room for a helium leak detection device, comprising a fixed bottom plate, a return control mechanism is arranged on the top of the fixed bottom plate, a connection sealing mechanism is arranged inside the return control mechanism, the connection sealing mechanism is used to ensure the air tightness of the connection node in the return control mechanism, the return control mechanism cooperates with the connection sealing mechanism to ensure that the air transported by the helium leak detection device flows back into the shielded room through the shielded room operation room and prevent the helium leakage in the helium leak detection device from causing damage to the health of personnel in the shielded room operation room;

[0008] A support component is disposed on the outer surface of the backflow control mechanism, and the support component plays a role of fixed support for the backflow control mechanism. The backflow control mechanism is electrically connected to a control device.

[0009] As a preferred technical solution of the present invention, a fixing hole is opened inside the top end of the fixed bottom plate, and the top end of the fixed bottom plate is fixedly connected to the reflux control mechanism.

[0010] As a preferred technical solution of the present invention, the reflux control mechanism includes a control component and a reflux component, the control component and the reflux component are movably connected, and the control component and the fixed base plate are fixedly connected.

[0011] As a preferred technical solution of the present invention, the control component includes an air pump, which is fixedly connected to a fixed base plate, the air pump is electrically connected to an output end of a controller, the output end of the controller is electrically connected to a helium detector, the output end of the controller is electrically connected to an electrical valve, the controller is electrically signal-connected to a control device, the controller is fixedly connected to a fixed base plate, the electrical valve is movably connected to a reflux component, and the helium detector is fixedly connected to the reflux component.

[0012] As a preferred technical solution of the present invention, the reflux component includes an air inlet pipe, the inner cavity of the air inlet pipe is communicated with the inner cavity of an external helium filling leak detection device, the air inlet pipe is movably connected to the output end of the air pump, the air inlet pipe is provided with a first connecting pipe through the air pump, one end of the first connecting pipe is movably connected to the input end of the air pump, the first connecting pipe is movably connected to a connecting sealing mechanism, the first connecting pipe is provided with a second connecting pipe through the connecting sealing mechanism, the second connecting pipe is movably connected to an electrical valve, the second connecting pipe is movably connected to a support assembly, the second connecting pipe is provided with an exhaust pipe through the electrical valve, the inner cavity of the exhaust pipe is fixedly connected to a helium detector, and the inner cavity of the exhaust pipe is communicated with an inner cavity of an external shielding chamber.

[0013] As a preferred technical solution of the present invention, a first rubber sealing sleeve is sleeved on the outer surface of the first connecting pipe, and the first rubber sealing sleeve is movably connected to the connecting sealing mechanism.

[0014] As a preferred technical solution of the present invention, a second rubber sealing sleeve is sleeved on the outer surface of one end of the second connecting pipe, a sealing rubber ring is fixedly installed on the outer wall of the second connecting pipe, and the second rubber sealing sleeve and the sealing rubber ring are movably connected to the connecting sealing mechanism.

[0015] As a preferred technical solution of the present invention, the connecting sealing mechanism includes a connecting tube and a sealing assembly, a first thread groove is opened inside one end of the connecting tube, the first thread groove is threadedly connected to the first connecting tube, a tapered mouth is fixedly installed on the outer surface of the connecting tube, the tapered mouth is connected to one end of the first thread groove, a second thread groove is opened inside the other end of the connecting tube, the second thread groove is threadedly connected to the second connecting tube, and the inner cavity side walls of the first thread groove and the second thread groove are fixedly connected to the sealing assembly.

[0016] As a preferred technical solution of the present invention, the sealing assembly includes a first sealing ring and a telescopic rod, the first sealing ring is fixedly connected to the inner cavity side wall of the first thread groove, one end of the telescopic rod is fixedly connected to the inner cavity side wall of the second thread groove, a spring is sleeved on the outer surface of the telescopic rod, and a second sealing ring is fixedly installed on one end of the telescopic rod away from the inner cavity side wall of the second thread groove, the second sealing ring is fixedly connected to one end of the spring, the second sealing ring and the spring are both movably connected to the inner cavity of the second thread groove, and the second sealing ring is movably connected to the second rubber sealing sleeve.

[0017] As a preferred technical solution of the present invention, the support assembly includes a fixed block, which is fixedly connected to the ground in the operating room of the shielding room, a support column is fixedly installed on the top of the fixed block, an arc block is fixedly installed on the end of the support column away from the fixed block, and the arc block is movably connected to the second connecting pipe.

[0018] (III) Beneficial effects

[0019] Compared with the prior art, the present invention provides an air return system for the operating room of a shielded room for a helium leak detection device, which has the following beneficial effects:

[0020] 1. The helium-filled leak detection device uses an air reflux system in the shielding room operating room. By starting the air pump, the air in the inner cavity of the external helium-filled leak detection device is transported to the air pump through the air inlet pipe, and then the output end of the air pump discharges the air through the inner cavities of the first connecting pipe and the second connecting pipe, and finally discharges the air into the external shielding room through the inner cavity of the exhaust pipe. When there is no helium in the air transported to the shielding room operating room during the use of the helium-filled leak detection device, the helium detector transmits a signal to the controller, and the output end of the controller controls the air pump to stop running. At the same time, the output end of the controller controls the electrical valve to close, and transmits the data to the display in the control device connected to the signal, and the data is provided for monitoring and viewing by the operator, so as to facilitate the operator to enter the shielding room operating room safely for work, thereby ensuring that the air transported by the helium-filled leak detection device flows back to the shielding room through the shielding room operating room and can prevent the helium leakage in the helium-filled leak detection device from causing damage to the health of the personnel in the shielding room operating room.

[0021] 2. The helium-filled leak detection device uses an air return system in the shielded room operating room. The first connecting pipe is installed in the inner cavity of the first thread groove. At this time, the tapered mouth enters the inner cavity of the first connecting pipe, and the first sealing ring contacts the first rubber sealing sleeve until the first connecting pipe is threadedly fixed in the inner cavity of the first thread groove. Then the second connecting pipe is installed in the inner cavity of the second thread groove. At this time, the second sealing ring is squeezed and moved by the second connecting pipe, the telescopic rod is shortened, the spring is elastically deformed, and the sealing rubber ring is in close contact with the inner cavity of the second thread groove. The second rubber sealing sleeve is in close contact with the second sealing ring until the second connecting pipe is threadedly fixed in the inner cavity of the second thread groove, thereby ensuring the airtightness of the connecting node of the connecting pipe and preventing harmful air leakage.

[0022] 3. The air return system of the shielded room operating room of the helium leak detection device supports and fixes the second connecting pipe by using a supporting assembly. At this time, the supporting column fixed on the top of the fixing block and the arc block fixed on the top of the supporting column play a role in fixing and supporting the second connecting pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a main perspective view of the present invention;

[0024] Figure 2 It is a side perspective view of the present invention;

[0025] Figure 3 It is a three-dimensional diagram of the support assembly of the present invention;

[0026] Figure 4 It is a three-dimensional diagram of the connection sealing mechanism of the present invention;

[0027] Figure 5 It is a half-cutaway perspective view of the connection sealing mechanism of the present invention;

[0028] Figure 6 For the present invention Figure 5 Enlarged view of point A in the middle;

[0029] Figure 7 It is a flow chart of the control components and control equipment of the present invention.

[0030] In the figure: 1. fixed base plate; 101. fixed hole; 2. reflux control mechanism; 201. air pump; 202. controller; 203. air inlet pipe; 204. first connecting pipe; 2041. first rubber sealing sleeve; 205. second connecting pipe; 2051. second rubber sealing sleeve; 2052. sealing rubber ring; 206. electrical valve; 207. exhaust pipe; 208. helium detector; 3. connecting sealing mechanism; 301. connecting pipe; 3011. first thread groove; 3012. second thread groove; 302. first sealing ring; 303. conical mouth; 304. telescopic rod; 305. spring; 306. second sealing ring; 4. support assembly; 401. fixed block; 402. support column; 403. arc block; 5. control device. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0033] See also Figure 1-7 , an air reflux system for a shielded room operating room for a helium leak detection device, comprising a fixed bottom plate 1, a reflux control mechanism 2 is arranged on the top of the fixed bottom plate 1, a connection sealing mechanism 3 is arranged inside the reflux control mechanism 2, the connection sealing mechanism 3 is used to ensure the air tightness of the connection node in the reflux control mechanism 2, the reflux control mechanism 2 cooperates with the connection sealing mechanism 3 to reflux the air transported by the helium leak detection device into the shielded room through the shielded room operating room and prevent the helium leakage in the helium leak detection device from causing damage to the health of personnel in the shielded room operating room;

[0034] A support assembly 4 is provided on the outer surface of the backflow control mechanism 2 , and the support assembly 4 plays a role of fixed support for the backflow control mechanism 2 . The backflow control mechanism 2 is electrically connected to a control device 5 .

[0035] Specifically, a fixing hole 101 is opened inside the top of the fixed base plate 1 , and the top of the fixed base plate 1 is fixedly connected to the reflux control mechanism 2 .

[0036] In this embodiment, a fixing hole 101 is provided inside the top of the fixing base plate 1, so as to facilitate fixing the fixing base plate 1 at a designated position by using external fixing nails.

[0037] Specifically, the reflux control mechanism 2 includes a control component and a reflux component. The control component and the reflux component are movably connected, and the control component and the fixed base plate 1 are fixedly connected.

[0038] In this embodiment, the reflux control mechanism 2 is composed of a control component and a reflux component, wherein the control component is movably connected to the reflux component, and the control component is fixedly connected to the fixed base plate 1, so as to facilitate the delivery of air into the shielding room operating room during the use of the helium leak detection device.

[0039] Specifically, the control component includes an air pump 201, which is fixedly connected to the fixed base plate 1, the air pump 201 is electrically connected to the output end of the controller 202, the output end of the controller 202 is electrically connected to the helium detector 208, the output end of the controller 202 is electrically connected to the electrical valve 206, the controller 202 is connected to the control device 5 by electrical signals, the controller 202 is fixedly connected to the fixed base plate 1, the electrical valve 206 is movably connected to the reflux component, and the helium detector 208 is fixedly connected to the reflux component.

[0040] In this embodiment, the controller 202 is a PLC, which starts the air pump 201 fixed on the top of the fixed base plate 1. At this time, the air pump 201 transports the air delivered to the operating room of the shielding room during the use of the helium leak detection device through the reflux component. When there is no helium in the air delivered to the operating room of the shielding room during the use of the helium leak detection device, the helium detector 208 fixed in the inner cavity of the reflux component transmits the signal to the controller 202 fixed on the top of the fixed base plate 1. The output end of the controller 202 controls the air pump 201 fixed on the top of the fixed base plate 1 to stop running. At the same time, the output end of the controller 202 controls the electric valve 206 to close, and transmits the data to the display in the signal-connected control device 5, and the operator is provided with monitoring and viewing, so as to facilitate the operator to safely enter the operating room of the shielding room for work.

[0041] Specifically, the reflux component includes an air inlet pipe 203, the inner cavity of the air inlet pipe 203 is communicated with the inner cavity of the external helium filling leak detection device, the air inlet pipe 203 is movably connected with the output end of the air pump 201, the air inlet pipe 203 is provided with a first connecting pipe 204 through the air pump 201, one end of the first connecting pipe 204 is movably connected with the input end of the air pump 201, the first connecting pipe 204 is movably connected with the connecting sealing mechanism 3, the first connecting pipe 204 is provided with a second connecting pipe 205 through the connecting sealing mechanism 3, the second connecting pipe 205 is movably connected with the electric valve 206, the second connecting pipe 205 is movably connected with the support assembly 4, the second connecting pipe 205 is provided with an exhaust pipe 207 through the electric valve 206, the inner cavity of the exhaust pipe 207 is fixedly connected with the helium detector 208, and the inner cavity of the exhaust pipe 207 is communicated with the inner cavity of the external shielding chamber.

[0042] In this embodiment, air is extracted through an air pump 201 fixed on the top of the fixed base plate 1. At this time, the air in the inner cavity of the external helium filling leak detection device is transported to the air pump 201 through the air inlet pipe 203 connected to the inner cavity of the external helium filling leak detection device. Then, the output end of the air pump 201 discharges the air through the inner cavities of the first connecting pipe 204 and the second connecting pipe 205, and finally through the inner cavity of the exhaust pipe 207 to the external shielding room, so as to avoid causing damage to the personnel in the operating room of the shielding room.

[0043] Specifically, a first rubber sealing sleeve 2041 is sleeved on the outer surface of the first connecting pipe 204 , and the first rubber sealing sleeve 2041 is movably connected to the connecting sealing mechanism 3 .

[0044] In this embodiment, a first rubber sealing sleeve 2041 is sleeved on the outer surface of the first connecting pipe 204 to ensure the air tightness of the connection node between the first connecting pipe 204 and the connection sealing mechanism 3.

[0045] Specifically, a second rubber sealing sleeve 2051 is sleeved on the outer surface of one end of the second connecting tube 205 , a sealing rubber ring 2052 is fixedly installed on the outer wall of the second connecting tube 205 , and the second rubber sealing sleeve 2051 and the sealing rubber ring 2052 are both movably connected to the connecting sealing mechanism 3 .

[0046] In this embodiment, a second rubber sealing sleeve 2051 is sleeved on the outer surface of one end of the second connecting tube 205, and a sealing rubber ring 2052 is fixedly installed on the outer wall of the second connecting tube 205, thereby ensuring the airtightness of the connection node between the second connecting tube 205 and the connection sealing mechanism 3.

[0047] Specifically, the connecting sealing mechanism 3 includes a connecting tube 301 and a sealing assembly, a first thread groove 3011 is opened inside one end of the connecting tube 301, the first thread groove 3011 is threadedly connected to the first connecting tube 204, a tapered mouth 303 is fixedly installed on the outer surface of the connecting tube 301, the tapered mouth 303 is connected to one end of the first thread groove 3011, a second thread groove 3012 is opened inside the other end of the connecting tube 301, the second thread groove 3012 is threadedly connected to the second connecting tube 205, and the inner cavity side walls of the first thread groove 3011 and the second thread groove 3012 are fixedly connected to the sealing assembly.

[0048] In this embodiment, the first connecting tube 204 is installed in the inner cavity of the first thread groove 3011 opened inside one end of the connecting tube 301. At this time, the tapered mouth 303 fixed on the outer surface of the connecting tube 301 enters the inner cavity of the first connecting tube 204 until the first connecting tube 204 is threadedly fixed in the inner cavity of the first thread groove 3011 opened inside one end of the connecting tube 301, and then the second connecting tube 205 is installed in the inner cavity of the second thread groove 3012 opened inside the other end of the connecting tube 301. At this time, the sealing component is installed in the inner cavity of the second thread groove 3012 opened inside the other end of the connecting tube 301 and runs until the second connecting tube 205 is threadedly fixed in the inner cavity of the second thread groove 3012 opened inside the other end of the connecting tube 301, thereby ensuring the airtightness of the connecting node of the connecting tube 301 and preventing harmful air leakage.

[0049] Specifically, the sealing assembly includes a first sealing ring 302 and a telescopic rod 304. The first sealing ring 302 is fixedly connected to the inner cavity side wall of the first thread groove 3011, one end of the telescopic rod 304 is fixedly connected to the inner cavity side wall of the second thread groove 3012, a spring 305 is sleeved on the outer surface of the telescopic rod 304, and a second sealing ring 306 is fixedly installed on one end of the telescopic rod 304 away from the inner cavity side wall of the second thread groove 3012, the second sealing ring 306 is fixedly connected to one end of the spring 305, the second sealing ring 306 and the spring 305 are both movably connected to the inner cavity of the second thread groove 3012, and the second sealing ring 306 is movably connected to the second rubber sealing sleeve 2051.

[0050] In this embodiment, when the first connecting tube 204 is installed in the inner cavity of the first thread groove 3011 opened in one end of the connecting tube 301, the first sealing ring 302 fixed on the side wall of the inner cavity of the first thread groove 3011 is in contact with the first rubber sealing sleeve 2041 sleeved on the outer surface of the first connecting tube 204, thereby ensuring the airtightness of the connecting node of the connecting tube 301; when the second connecting tube 205 is installed in the inner cavity of the second thread groove 3012 opened in the other end of the connecting tube 301, the second sealing ring 302 fixed on the bottom end of the telescopic rod 304 is in contact with the first rubber sealing sleeve 2041 sleeved on the outer surface of the first connecting tube 204, thereby ensuring the airtightness of the connecting node of the connecting tube 301; The sealing ring 306 moves due to the squeezing of the second connecting tube 205, the telescopic rod 304 fixed on the inner side wall of the second threaded groove 3012 is shortened, the spring 305 sleeved on the outer surface of the telescopic rod 304 undergoes elastic deformation, and a sealing rubber ring 2052 is sleeved on the outer surface of the second connecting tube 205 and is in close contact with the inner cavity of the second threaded groove 3012, and the second rubber sealing sleeve 2051 sleeved on the outer surface of one end of the second connecting tube 205 is in close contact with the second sealing ring 306, thereby ensuring the air tightness of the connecting node of the connecting tube 301.

[0051] Specifically, the support assembly 4 includes a fixed block 401, which is fixedly connected to the ground in the shielding room operation room. A support column 402 is fixedly installed on the top of the fixed block 401, and an arc block 403 is fixedly installed on the end of the support column 402 away from the fixed block 401. The arc block 403 is movably connected to the second connecting pipe 205.

[0052] In this embodiment, by fixing the fixed block 401 on the ground in the operating room of the shielding room, the support column 402 fixed on the top of the fixed block 401 and the arc block 403 fixed on the top of the support column 402 play a fixed supporting role for the second connecting pipe 205, and further play a fixed supporting role for the reflux control mechanism 2.

[0053] Working principle: When in use, the fixed base plate 1 is fixed at a designated position in the operating room of the shielding room by using an external fixing nail to pass through the inner cavity of the fixing hole 101 opened inside the top of the fixed base plate 1, and then the first connecting pipe 204 is installed in the inner cavity of the first thread groove 3011 opened inside one end of the connecting pipe 301. At this time, the tapered mouth 303 fixed on the outer surface of the connecting pipe 301 enters the inner cavity of the first connecting pipe 204, and the first sealing ring 302 fixed on the side wall of the inner cavity of the first thread groove 3011 contacts the first rubber sealing sleeve 2041 sleeved on the outer surface of the first connecting pipe 204 until the first connecting pipe 204 is threadedly fixed in the inner cavity of the first thread groove 3011 opened inside one end of the connecting pipe 301, and then the second connecting pipe 205 is installed in the inner cavity of the second thread groove 3012 opened inside the other end of the connecting pipe 301. At this time, the second sealing ring 306 fixed at the bottom end of the telescopic rod 304 is received by the second connecting pipe 2 05 is squeezed and moved, the telescopic rod 304 fixed on the inner side wall of the second thread groove 3012 is shortened, the spring 305 sleeved on the outer surface of the telescopic rod 304 is elastically deformed, and the sealing rubber ring 2052 fixed on the outer surface of the second connecting tube 205 is sleeved and closely contacted with the inner cavity of the second thread groove 3012, and the second rubber sealing sleeve 2051 sleeved on the outer surface of one end of the second connecting tube 205 is closely contacted with the second sealing ring 306 until the second connecting tube 205 is threadedly fixed to the inner cavity of the second thread groove 3012 opened inside the other end of the connecting tube 301, thereby ensuring the air tightness of the connecting node of the connecting tube 301 and preventing harmful air leakage; the second connecting tube 205 is supported and fixed by the support assembly 4, at this time, the support column 402 fixed on the top of the fixing block 401 and the arc block 403 fixed on the top of the support column 402 play a role in fixing and supporting the second connecting tube 205;

[0054] Then, by starting the air pump 201 fixed on the top of the fixed base plate 1, the air in the inner cavity of the external helium filling leak detection device is transported to the air pump 201 through the air inlet pipe 203 connected to the inner cavity of the external helium filling leak detection device, and then the output end of the air pump 201 discharges the air through the inner cavities of the first connecting pipe 204 and the second connecting pipe 205, and finally through the inner cavity of the exhaust pipe 207 to the external shielding room. When there is no helium in the air transported to the operating room of the shielding room during the use of the helium filling leak detection device, the helium detector 208 fixed in the inner cavity of the exhaust pipe 207 transmits a signal to the controller 202 fixed on the top of the fixed base plate 1, and the output end of the controller 202 controls the air pump 201 fixed on the top of the fixed base plate 1 to stop. Stop running, at the same time, the output end of the controller 202 controls the electric valve 206 to close, and transmits data to the display in the signal-connected control device 5, and provides monitoring and viewing for the operator, so as to facilitate the operator to safely enter the shielding room operating room for work, thereby ensuring that the air transported by the helium leak detection device flows back into the shielding room through the shielding room operating room and can prevent the helium leakage in the helium leak detection device from causing damage to the health of the personnel in the shielding room operating room. The device not only ensures that the air transported by the helium leak detection device flows back into the shielding room through the shielding room operating room and can prevent the helium leakage in the helium leak detection device from causing damage to the health of the personnel in the shielding room operating room, but also ensures the air tightness of its connection nodes.

[0055] It should be noted that, in this article, terms such as "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0056] Although 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An air return system for a shielded room operating room of a helium leak detection device, comprising a fixed bottom plate (1), Features: A reflux control mechanism (2) is arranged at the top of the fixed bottom plate (1), and a connection sealing mechanism (3) is arranged inside the reflux control mechanism (2). The connection sealing mechanism (3) is used to ensure the air tightness of the connection node in the reflux control mechanism (2). The reflux control mechanism (2) and the connection sealing mechanism (3) cooperate to allow the air transported by the helium leak detection device to flow back into the shielding room through the shielding room operation room and to prevent the helium leakage in the helium leak detection device from causing damage to the health of personnel in the shielding room operation room; The outer surface of the backflow control mechanism (2) is provided with a support component (4), the support component (4) plays a role of fixing and supporting the backflow control mechanism (2), and the backflow control mechanism (2) is electrically connected to a control device (5); A fixing hole (101) is provided inside the top end of the fixing base plate (1), and the top end of the fixing base plate (1) is fixedly connected to the reflux control mechanism (2); The reflux control mechanism (2) comprises a control component and a reflux component, the control component and the reflux component are movably connected, and the control component and the fixed base plate (1) are fixedly connected; The control component comprises an air pump (201), the air pump (201) is fixedly connected to the fixed base plate (1), the air pump (201) is electrically connected to the output end of the controller (202), the output end of the controller (202) is electrically connected to the helium detector (208), the output end of the controller (202) is electrically connected to the electrical valve (206), the controller (202) and the control device (5) are connected by electrical signals, the controller (202) and the fixed base plate (1) are fixedly connected, the electrical valve (206) and the reflux component are movably connected, and the helium detector (208) and the reflux component are fixedly connected; The reflux component comprises an air intake pipe (203), the inner cavity of the air intake pipe (203) is communicated with the inner cavity of an external helium filling leak detection device, the air intake pipe (203) is movably sleeved with the output end of the air pump (201), the air intake pipe (203) is provided with a first connecting pipe (204) through the air pump (201), one end of the first connecting pipe (204) is movably sleeved with the input end of the air pump (201), the first connecting pipe (204) is movably connected to the connection sealing mechanism (3), and the first connecting pipe (204) is movably sleeved with the input end of the air pump (201). The tube (204) is provided with a second connecting tube (205) through a connecting sealing mechanism (3); the second connecting tube (205) is movably connected to an electric valve (206); the second connecting tube (205) is movably connected to a supporting assembly (4); the second connecting tube (205) is provided with an exhaust pipe (207) through the electric valve (206); the inner cavity of the exhaust pipe (207) is fixedly connected to a helium detector (208); and the inner cavity of the exhaust pipe (207) is communicated with the inner cavity of an external shielding chamber; The connection sealing mechanism (3) comprises a connection tube (301) and a sealing assembly, wherein a first thread groove (3011) is provided inside one end of the connection tube (301), and the first thread groove (3011) is threadedly connected to the first connection tube (204), and a tapered mouth (303) is fixedly installed on the outer surface of the connection tube (301), and the tapered mouth (303) is connected to one end of the first thread groove (3011), and a second thread groove (3012) is provided inside the other end of the connection tube (301), and the second thread groove (3012) is threadedly connected to the second connection tube (205), and the inner cavity side walls of the first thread groove (3011) and the second thread groove (3012) are fixedly connected to the sealing assembly.

2. The air return system for the operating room of the shielded room for the helium leak detection device according to claim 1, Features: A first rubber sealing sleeve (2041) is sleeved on the outer surface of the first connecting pipe (204), and the first rubber sealing sleeve (2041) is movably connected to the connecting sealing mechanism (3).

3. The air return system for the operating room of the shielded room for the helium leak detection device according to claim 1, Features: A second rubber sealing sleeve (2051) is sleeved on the outer surface of one end of the second connecting tube (205), a sealing rubber ring (2052) is fixedly mounted on the outer wall of the second connecting tube (205), and the second rubber sealing sleeve (2051) and the sealing rubber ring (2052) are both movably connected to the connection sealing mechanism (3).

4. The air return system for the operating room of the shielded room for the helium leak detection device according to claim 1, Features: The sealing assembly comprises a first sealing ring (302) and a telescopic rod (304); the first sealing ring (302) is fixedly connected to the inner cavity side wall of the first thread groove (3011); one end of the telescopic rod (304) is fixedly connected to the inner cavity side wall of the second thread groove (3012); a spring (305) is sleeved on the outer surface of the telescopic rod (304); a second sealing ring (306) is fixedly installed on one end of the telescopic rod (304) away from the inner cavity side wall of the second thread groove (3012); the second sealing ring (306) is fixedly connected to one end of the spring (305); the second sealing ring (306) and the spring (305) are both movably connected to the inner cavity of the second thread groove (3012); and the second sealing ring (306) is movably connected to the second rubber sealing sleeve (2051).

5. The air return system for the operating room of the shielded room for the helium leak detection device according to claim 1, Features: The support assembly (4) comprises a fixed block (401), the fixed block (401) is fixedly connected to the ground in the operating room of the shielding room, a support column (402) is fixedly installed on the top of the fixed block (401), an arc block (403) is fixedly installed on the end of the support column (402) away from the fixed block (401), and the arc block (403) is movably connected to the second connecting pipe (205).

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