Explosion-proof positive pressure cabinet for leak detector

Abstract

The present disclosure provides an explosion-proof positive pressure cabinet for a leak detector, which comprises an explosion-proof cabinet body, a bearing platform, a pressure regulating assembly and a first pressure relief valve. The explosion-proof cabinet body has a containing space. A side of the explosion-proof cabinet body is provided with an openable and closable door to open or close the containing space. A first connecting part and a second connecting part are provided on a first side wall of the explosion-proof cabinet body. The first connecting part is located on both sides of the containing space and is used for connecting a detection port of the leak detector and a measured pipe column. The second connecting part is located on one side of the containing space and is used for connecting an exhaust port of the leak detector. The bearing platform is movably arranged in the containing space corresponding to the openable and closable door, so as to be able to extend out of or retract into the containing space. The pressure regulating assembly is arranged on a second side wall of the explosion-proof cabinet body. One end of the pressure regulating assembly is communicated with the containing space, and the other end is used for detachably connecting a gas source to charge the containing space with pressure so as to keep the containing space in a positive pressure state. The first pressure relief valve is arranged on a third side wall of the explosion-proof cabinet body, and the first pressure relief valve is communicated with the inside and outside of the containing space.

Description

Technical Field

[0001] This disclosure relates to the field of testing equipment for oil and gas exploration and development, and in particular to explosion-proof positive pressure cabinets for leak detectors. Background Technology

[0002] During the on-site gas seal inspection of the casing and tubing, a helium leak detector is used to check for leaks in the casing and tubing connection threads in order to ensure the integrity of the tubing string.

[0003] Currently, helium leak detectors are directly connected to the oil casing at the work site, which is an area where oil and gas tend to accumulate, making deflagration highly likely and resulting in low operational safety. Utility Model Content

[0004] One of the technical problems this disclosure aims to solve is that the helium leak detector is directly connected to the oil casing at the work site, which is an area where oil and gas are prone to accumulate and are extremely prone to deflagration, resulting in low operational safety.

[0005] This disclosure provides an explosion-proof positive pressure cabinet for a leak detector, comprising:

[0006] An explosion-proof cabinet has a accommodating space. One side of the cabinet has an openable door to allow opening or closing of the accommodating space. A first connecting portion and a second connecting portion are provided on the first side wall of the explosion-proof cabinet. The first connecting portion, located on both sides inside and outside the accommodating space, is used to connect the detection port of a leak detector to the test tube column, respectively. The second connecting portion, located on one side inside the accommodating space, is used to connect to the exhaust port of the leak detector, allowing the leak detector to exhaust air out of the explosion-proof cabinet. The first side wall is different from the side where the openable door is located.

[0007] A support platform is movably disposed within the accommodating space corresponding to the openable door. The support platform can extend or retract into the accommodating space and is used to support the leak detector.

[0008] A pressure regulating component is disposed on the second side wall of the explosion-proof cabinet. One end of the pressure regulating component is connected to the accommodating space, and the other end is used to detachably connect to a gas source to pressurize the accommodating space and maintain the accommodating space in a positive pressure state. The second side wall is different from the side where the openable door is located.

[0009] The first pressure relief valve is located on the third side wall of the explosion-proof cabinet. The first pressure relief valve connects the inside and outside of the accommodating space and is normally open.

[0010] In some embodiments, the aforementioned explosion-proof positive pressure cabinet for leak detectors further includes a second pressure relief valve;

[0011] The second pressure relief valve is disposed on the second side wall. When the pressure in the accommodating space exceeds the first threshold, the second pressure relief valve is controlled to start releasing pressure.

[0012] In some embodiments, the aforementioned explosion-proof positive pressure cabinet for leak detectors further includes a detection component and a control unit;

[0013] The detection component is disposed within the containment space and is used to collect environmental parameters within the containment space, the environmental parameters including at least the pressure within the containment space;

[0014] The control unit is signal-connected to the detection component and the second pressure relief valve;

[0015] When the detection component detects that the pressure in the containment space exceeds the first threshold, the control unit controls the second pressure relief valve to open.

[0016] In some embodiments, the aforementioned explosion-proof positive pressure cabinet for leak detectors further includes an alarm device;

[0017] The alarm device is installed outside the explosion-proof cabinet and is signal-connected to the control unit. When the detection component detects that the pressure in the containment space exceeds the first threshold, the control unit controls the alarm device to issue an alarm.

[0018] In some embodiments, the aforementioned explosion-proof positive pressure cabinet for leak detectors further includes a threshold pressure relief valve;

[0019] The threshold pressure relief valve is located on the top of the explosion-proof cabinet. When the pressure in the containment space exceeds the second threshold, the threshold pressure relief valve is activated to release pressure.

[0020] Wherein, the second threshold is greater than the first threshold.

[0021] In some embodiments, the aforementioned explosion-proof positive pressure cabinet for leak detectors is provided with a power supply port on the explosion-proof cabinet. The power supply port is located on both sides inside and outside the accommodating space and is used to electrically connect the leak detector and the power supply. A power switch is connected to the side of the power supply port inside the accommodating space.

[0022] The control unit is electrically connected to the power switch;

[0023] When the temperature inside the containment space exceeds the specified temperature range, the control unit controls the power switch to disconnect.

[0024] The environmental parameters include at least the temperature within the containment space.

[0025] In some embodiments, the aforementioned explosion-proof positive pressure cabinet for leak detectors further includes a display screen;

[0026] The display screen is mounted on the third side wall of the explosion-proof cabinet. The display screen is signal-connected to the control unit and the detection component to display the detection results of the detection component and the control parameters of the control unit.

[0027] In some embodiments, the aforementioned explosion-proof positive pressure cabinet for leak detectors is provided with a viewing window on the top of the explosion-proof cabinet and / or on the side wall of the explosion-proof cabinet opposite to the opening and closing door, and a transparent plate is sealed at the viewing window to display the detection data of the leak detector.

[0028] In some embodiments, the aforementioned leak detector uses an explosion-proof positive pressure cabinet, wherein the explosion-proof cabinet is provided with a plurality of explosion-proof buttons around the viewing window, the explosion-proof buttons being used to flexibly abut the control buttons of the leak detector.

[0029] In some embodiments, the aforementioned leak detector explosion-proof positive pressure cabinet is provided with an explosion-proof cover on the cabinet corresponding to the viewing window;

[0030] The explosion-proof cover is rotatably connected to the explosion-proof cabinet so that the explosion-proof cover can be flipped over and placed over the viewing window. The explosion-proof cover has a viewing area corresponding to the viewing window.

[0031] The leak detector explosion-proof positive pressure cabinet provided in this disclosure utilizes the above technical solution. The cabinet provides explosion-proof enclosure space for the leak detector, and a pull-out support platform within the cabinet provides an installation position, improving installation convenience. A pressure regulating component and a first pressure relief valve are incorporated to pressurize the cabinet and maintain a positive pressure state, effectively preventing flammable and explosive substances from entering the cabinet and significantly improving explosion-proof performance. This effectively solves the problem that helium leak detectors are directly connected to oil casing pipes at the work site, which is an area prone to oil and gas accumulation, posing a high risk of deflagration and low operational safety. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a front structural schematic diagram of the explosion-proof positive pressure cabinet for leak detectors disclosed in this embodiment;

[0034] Figure 2 This is a schematic diagram of the rear structure of the explosion-proof positive pressure cabinet for leak detectors disclosed in this embodiment;

[0035] Figure 3 This is a schematic diagram of the structural fit between the explosion-proof positive pressure cabinet for the leak detector and the support platform disclosed in this embodiment.

[0036] Figure 4 This is a schematic diagram of the left side of the explosion-proof positive pressure cabinet for the leak detector disclosed in this embodiment;

[0037] Figure 5 This is a schematic diagram of the right side of the explosion-proof positive pressure cabinet for leak detectors disclosed in this embodiment;

[0038] Figure 6 This is a structural block diagram of the explosion-proof positive pressure cabinet for leak detectors disclosed in this embodiment;

[0039] Explanation of reference numerals in the attached figures:

[0040] Explosion-proof cabinet 1, openable door 11, first connecting part 12, second connecting part 13, power supply port 14, power reset switch 15, viewing window 16, explosion-proof button 161, explosion-proof cover 17, viewing area 171, tilted cabinet surface 18, lifting lug 19, bearing platform 2, pressure regulating assembly 3, pressure reducing valve 31, throttle valve 32, first pressure relief valve 4, second pressure relief valve 5, detection assembly 6, pressure sensor 61, temperature sensor 62, control unit 7, alarm device 8, threshold pressure relief valve 9, display screen 10, handle 20, power supply indicator light 21, emergency stop button 22. Detailed Implementation

[0041] The embodiments of this disclosure will be further described in detail below with reference to the accompanying drawings and examples. The detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of this disclosure by way of example, but should not be used to limit the scope of this disclosure. This disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0042] These embodiments are provided to make the disclosure thorough and complete, and to fully express the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, material composition, numerical expressions, and values ​​set forth in these embodiments should be interpreted as exemplary only and not as limiting.

[0043] It should be noted that, in the description of this disclosure, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationship, are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0044] Furthermore, the terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. "Vertical" is not strictly vertical, but within the permissible margin of error. "Parallel" is not strictly parallel, but within the permissible margin of error. Terms such as "including" or "contains" mean that the element preceding the word encompasses the element listed after the word, and do not exclude the possibility of encompassing other elements as well.

[0045] It should also be noted that, in the description of this disclosure, unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this disclosure depending on the specific circumstances. When a particular device is described as being located between a first device and a second device, an intermediary device may or may not be present between the particular device and the first or second device.

[0046] All terms used in this disclosure have the same meaning as understood by one of ordinary skill in the art to which this disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.

[0047] In on-site testing of the gas seal in casing and tubing, a helium leak detector is used to check for leaks in the casing and tubing connection threads to ensure the integrity of the tubing string. Specifically, a sealing cap is installed at the casing and tubing coupling, and helium or a helium-containing gas is sprayed into it. The helium leak detector is connected to the casing and tubing end and aspirated. If the helium leak detector detects helium, it indicates a leak at the casing and tubing coupling; otherwise, the seal is good. However, currently, the helium leak detector is directly connected to the casing and tubing at the work site, lacking proper protection. Since the work site is an area where oil and gas can easily accumulate, there is a high risk of deflagration, resulting in low operational safety.

[0048] The explosion-proof positive pressure cabinet for leak detectors provided in this embodiment allows for the installation and removal of the leak detector relative to the explosion-proof cabinet through the combination of the explosion-proof cabinet body and the openable door. Correspondingly, the pull-out support platform provides an installation position for the leak detector, improving the convenience of loading and unloading. At the same time, the setting of pressure regulating components and the first pressure relief valve enables the pressurization of the containment space and maintains a positive pressure state of 100pa-1000pa, thereby preventing flammable and explosive substances from entering the containment space or coming into contact with the leak detector, effectively avoiding risks and improving the explosion-proof effect.

[0049] Example 1

[0050] Reference Appendix Figure 1 Appendix Figure 2 Appendix Figure 3 Appendix Figure 4 and appendix Figure 5 This embodiment discloses an explosion-proof positive pressure cabinet for a leak detector, comprising an explosion-proof cabinet body 1, a support platform 2, a pressure regulating component 3, and a first pressure relief valve 4. The explosion-proof cabinet body 1 has an accommodating space, and one side of the explosion-proof cabinet body 1 is provided with an openable door 11 to open or close the accommodating space. The first side wall of the explosion-proof cabinet body 1 is provided with a first connecting part 12 and a second connecting part 13. The first connecting part 12 is located on both sides inside and outside the accommodating space and is used to connect the detection port of the leak detector (not shown in the figure) and the test tube column (not shown in the figure), respectively. The second connecting part 13 is located on one side inside the accommodating space and is used to connect the exhaust port of the leak detector so that the leak detector can exhaust to the outside of the explosion-proof cabinet body 1. The first side wall is different from the first side wall. The side where the openable door 11 is located; the support platform 2 is movably arranged within the accommodating space corresponding to the openable door 11, the support platform 2 can extend or retract into the accommodating space, and the support platform 2 is used to support the leak detector; the pressure regulating component 3 is arranged on the second side wall of the explosion-proof cabinet 1, one end of the pressure regulating component 3 is connected to the accommodating space, and the other end is used to detachably connect to a gas source (not shown in the figure) to pressurize the accommodating space to maintain the accommodating space in a positive pressure state; the second side wall is different from the side where the openable door 11 is located; the first pressure relief valve 4 is arranged on the third side wall of the explosion-proof cabinet 1, the first pressure relief valve 4 connects the inside and outside of the accommodating space, and the first pressure relief valve 4 is in a normally open state.

[0051] Understandably, to address the issue that helium leak detectors are directly connected to oil casings at the work site, lacking protection, and that the work site is an area where oil and gas easily accumulate, posing a high risk of deflagration and low operational safety, this embodiment provides an explosion-proof positive pressure cabinet for the leak detector. The cabinet 1 provides an explosion-proof containment space to house the leak detector. The pressure regulating component 3 and the first pressure relief valve 4 are used to pressurize the explosion-proof cabinet 1 and maintain a positive pressure state inside, thereby preventing flammable and explosive substances from entering the leak detector and effectively ensuring its operational safety. Furthermore, this embodiment includes a pull-out support platform 2 for installing and supporting the leak detector, improving ease of installation and disassembly.

[0052] In this embodiment, the explosion-proof positive pressure cabinet can be used to detect positive pressure leaks.

[0053] The explosion-proof cabinet 1 is a rigid structure, which can be, but is not limited to, a cabinet structure enclosed by stainless steel plates. In this embodiment, considering both explosion-proof and heat dissipation performance, the thickness of the stainless steel plate can be designed to be 2mm-4mm, for example, 3.5mm. The shape and size of the explosion-proof cabinet 1 in this embodiment can be designed and adjusted according to actual needs, as long as it can accommodate the leak detector and its related instrument components; it can be, but is not limited to, a hexahedral form. In this embodiment, rubber shock-absorbing feet or casters can be installed at the bottom of the explosion-proof cabinet 1. The hinged door 11 can be installed on the side or back of the explosion-proof cabinet 1, which can open and close the storage space without affecting the overall appearance of the explosion-proof positive pressure cabinet. The hinged door 11 can be opened when the leak detector needs to be installed or removed, and the hinged door 11 can be closed when the leak detector is installed and testing is carried out. The hinged door 11 can be formed directly from the side wall panel of the explosion-proof cabinet 1. That is, the side wall panel can be rotatably opened and closed by rotating it to the explosion-proof cabinet 1 through a pivot or hinge at the edge of the side wall panel. Correspondingly, a sealing strip is provided at the circumferential edge of the side wall panel to ensure the sealing when closed. In this embodiment, a part of the side wall panel can also be cut out to form the above-mentioned rotatable opening and closing form, and the sealing setting is the same. Of course, it is not difficult to understand that locking components can be set on the openable door 11 in conjunction with the explosion-proof cabinet 1. For example, a bolt seat can be set on the explosion-proof cabinet 1, and a corresponding ear plate with screw holes can be set on the openable door 11. By screwing the bolt into the ear plate and the bolt seat at the same time, the openable door 11 can be kept pressed and locked, thereby sealing the accommodating space.

[0054] The first connecting part 12 and the second connecting part 13 can be, but are not limited to, a gas-electric hybrid aviation plug. The first connecting part 12 has a sealing ring on its circumferential side facing the inner space to ensure the airtightness of the inner space. The first connecting part 12 can be connected to the detection port of the leak detector through a pipeline, and the detection port of the leak detector can be indirectly connected to the test column through the first connecting part 12 for air intake operation. Similarly, the second connecting part 13 has a sealing ring on its circumferential side facing the inner space to ensure the airtightness of the inner space. The second connecting part 13 can be connected to the exhaust port of the leak detector through a pipeline, so that the gas sucked in by the leak detector can be discharged through the exhaust port and the second connecting part 13 to ensure normal operation. In this embodiment, the second connecting part 13 can also be set as a one-way valve, which can be connected to the exhaust port of the leak detector through a pipeline to restrict only the air exhaust operation, thereby ensuring the air exhaust operation without introducing flammable and explosive components into the inner space. In this embodiment, the first side wall where the first connecting part 12 and the second connecting part 13 are located is different from the side where the openable door 11 is located. For example, when the openable door 11 is the back side of the explosion-proof cabinet 1, the first side wall can be the side wall of the explosion-proof cabinet 1. Of course, the first connecting part 12 and the second connecting part 13 can be on the same side wall or not on the same side wall.

[0055] The support platform 2 is a rigid structure, which can be a flat plate, a trough, a frame, etc., as long as it can provide a support surface, support area, or support space for the leak detector. In this embodiment, the support platform 2 is pull-out, so when it is necessary to install or remove the leak detector, the openable door 11 is opened to pull out the support platform 2, and the installation and removal operations can be carried out outside the explosion-proof cabinet 1, preventing the space restriction inside the explosion-proof cabinet 1 from affecting the efficiency and convenience of installation and removal. Accordingly, in this embodiment, a guide sliding mechanism, such as pulleys, sliders, etc., can be set on the inner wall of the explosion-proof cabinet 1, and a sliding mechanism, such as a slide groove, etc., can be set on the support platform 2 accordingly; for example, see attached... Figure 1 In this embodiment, the support platform 2 can be configured as a U-shaped groove structure with a downward opening. Z-shaped frames are provided on the side walls at both ends and extend outward. A guide groove with an opening is provided on the inner wall of the explosion-proof cabinet 1. One end of the Z-shaped frame is inserted into the opening of the guide groove, so that it can slide in the guide groove. At the same time, the U-shaped support platform 2 with the opening facing downward allows the leak detector to be buffered in the depth direction of the U-shaped groove when it is pressed down. One end of the Z-shaped frame is supported by the guide groove and the other end is used to support the U-shaped frame, so as to improve the support stability of the support platform 2 while achieving sliding.

[0056] The pressure regulating component 3 connects the gas source and the containment space, pressurizing and adjusting the pressure within the containment space. In this embodiment, the pressure regulating component 3 may include, but is not limited to, a pressure reducing valve 31 and a throttle valve 32, because external gas sources are usually high-pressure sources. For the positive pressure of 100pa-1000pa required in this embodiment, pressure reduction and adjustment are necessary. The pressure reducing valve 31 is used for detachable connection to the gas source, and the throttle valve 32 is connected between the pressure reducing valve 31 and the explosion-proof cabinet 1. In this embodiment, both the pressure reducing valve 31 and the throttle valve 32 can be manual valves, and the specific opening degree can be designed and adjusted according to actual needs or experience, without specific limitations here. The second side wall where the pressure regulating component 3 is located is different from the side where the openable door 11 is located. Therefore, the pressure regulating component 3 can be on the same side as the first connecting part 12, or it can be on a different side. It is not difficult to understand that in this embodiment, the pressure range corresponding to the positive pressure state lock in the containment space is set to 100pa-1000pa. In order to ensure the airflow circulation inside and outside the containment space for heat dissipation, the lower limit of pressure cannot be too low. It is set to 100pa according to the needs and tests. At the same time, the upper limit of pressure can be set to 1000pa according to the pressure bearing capacity of the explosion-proof cabinet 1. This upper limit value needs to be less than the pressure bearing capacity of the explosion-proof cabinet 1, so as to ensure the safety of the explosion-proof positive pressure cabinet.

[0057] In this embodiment, the first pressure relief valve 4 is a manual pressure relief valve. It can be positioned on the opposite side of the pressure regulating component 3 to prevent the intake and exhaust gases from interfering with each other and reducing the efficiency of reaching a positive pressure state within the containment space. In this embodiment, the first pressure relief valve 4 is normally open, ensuring a constant positive pressure state with gas flow within the containment space. This not only prevents blind spots caused by leaks but also improves heat dissipation efficiency during leak detection. Accordingly, in this embodiment, the pressure relief rate of the first pressure relief valve 4 can be adjusted to be less than the intake rate of the pressure regulating component 3 to ensure efficient reaching of a positive pressure state.

[0058] It is also understood that the explosion-proof cabinet 1 in this embodiment may also be provided with a power supply port 14, which can at least power the leak detector; the power supply port 14 may be, but is not limited to, an explosion-proof sparkless plug, which can reserve a plug position outside the explosion-proof cabinet 1 to electrically connect to an external power source, and can connect the power supply line of the leak detector within the accommodating space. This setting is easily understood and implemented by those skilled in the art, and will not be elaborated here.

[0059] As listed above, the explosion-proof positive pressure cabinet for the leak detector provided in this disclosure includes an explosion-proof cabinet body 1 that provides explosion-proof housing space for the leak detector. A pull-out support platform 2 is installed inside the explosion-proof cabinet body 1 to provide an installation position for the leak detector, improving installation convenience. A pressure regulating component 3 and a first pressure relief valve 4 are used to pressurize the explosion-proof cabinet body 1 to maintain a positive pressure state, effectively ensuring that flammable and explosive substances will not enter the explosion-proof cabinet, thus effectively improving the explosion-proof effect. This effectively solves the problem that helium leak detectors are directly connected to oil casing pipes at the work site, which is an area where oil and gas easily accumulate, making deflagration highly likely and resulting in low operational safety.

[0060] In this article, the term "and / or" is merely a description of the relationship between related objects, identifying three possible relationships, such as A and / or B. Specifically, it can be understood as: A and B can be included simultaneously, A can exist alone, or B can exist alone, and any of the above three situations can be met.

[0061] In some embodiments, refer to the appendix Figure 5 The explosion-proof positive pressure cabinet for leak detectors provided in this embodiment also includes a second pressure relief valve 5 in a specific implementation. The second pressure relief valve 5 is disposed on the second side wall. When the pressure in the accommodating space exceeds the first threshold, the second pressure relief valve 5 is controlled to start releasing pressure.

[0062] Understandably, to ensure safety, a second pressure relief valve 5 is provided in this embodiment. The second pressure relief valve 5 is an electrically controlled valve body, which can be opened and closed according to an electrical control signal. It is easy to understand that the first threshold is the aforementioned 1000 Pa. When the pressure in the containment space reaches or exceeds 1000 Pa, the second pressure relief valve 5 can be controlled to relieve pressure. This situation may be caused by excessive air intake rate on the pressure regulating component 3 side or by an increase in temperature in the containment space accelerating the pressure increase, etc. Thus, the second pressure relief valve 5 actively relieves pressure to keep the internal pressure stable within the aforementioned range of 100-1000 Pa.

[0063] Accordingly, see Appendix Figure 6 The explosion-proof positive pressure cabinet for leak detectors provided in this embodiment further includes a detection component 6 and a control unit 7 in a specific implementation. The detection component 6 is disposed in the containment space and is used to collect environmental parameters within the containment space. The environmental parameters include at least the pressure within the containment space. The control unit 7 is signal-connected to the detection component 6 and the second pressure relief valve 5. When the detection component 6 detects that the pressure within the containment space exceeds the first threshold, the control unit 7 controls the second pressure relief valve 5 to open.

[0064] It is understood that, in order to achieve automatic control of the second pressure relief valve 5, a detection component 6 and a control unit 7 are configured in this embodiment. The detection component 6 may include, but is not limited to, a pressure sensor 61 and a temperature sensor 62. The control unit 7 is a PLC controller capable of data transmission and reception, analysis and processing, comparison, and program editing. The pressure sensor 61 is signal-connected to the control unit 7, which may be, but is not limited to, a cable connection or a wireless signal connection. When the pressure sensor 61 detects that the pressure in the containment space reaches or exceeds 1000 Pa, the control unit 7 controls the second pressure relief valve 5 to open and release pressure to prevent excessive pressure in the containment space from affecting the leak detector or causing impact damage to the instruments and other components equipped on the leak detector. Correspondingly, when the detection result returns to below 1000 Pa, the control unit controls the second pressure relief valve 5 to close and stop releasing pressure.

[0065] Further, see Appendix Figure 5 and attached Figure 6 The explosion-proof positive pressure cabinet for leak detectors provided in this embodiment also includes an alarm device 8 in a specific implementation. The alarm device 8 is located outside the explosion-proof cabinet 1 and is signal-connected to the control unit 7. When the detection component 6 detects that the pressure in the containment space exceeds the first threshold, the control unit 7 controls the alarm device 8 to issue an alarm.

[0066] Understandably, to improve the speed of emergency response, an alarm device 8 is included in this embodiment. The alarm device 8 can be, but is not limited to, an audible and visual alarm light, which can be attached or clipped to the outside of the explosion-proof cabinet 1, and can be, but is not limited to, the top of the cabinet. When the pressure inside the containment space reaches or exceeds 1000 Pa, the control unit 7 controls the alarm device 8 to emit an audible and visual alarm signal to alert personnel. Of course, it is also understood that in this embodiment, a third threshold of 100 Pa can be preset in the control unit 7. When the pressure inside the containment space is lower than 100 Pa, the alarm device 8 is controlled to alert personnel to operate the pressure regulating component 3 for rapid pressurization to maintain a positive pressure environment.

[0067] In some embodiments, refer to the appendix Figure 1 The explosion-proof positive pressure cabinet for leak detectors provided in this embodiment further includes a threshold pressure relief valve 9 in a specific implementation. The threshold pressure relief valve 9 is located on the top of the explosion-proof cabinet 1. When the pressure in the containment space exceeds the second threshold, the threshold pressure relief valve 9 is activated to release pressure. The second threshold is greater than the first threshold.

[0068] Understandably, to improve safety, this embodiment includes a threshold pressure relief valve 9, which automatically opens to relieve pressure when the pressure within the containment space exceeds the second threshold. The second threshold can be designed and adjusted according to actual needs, for example, 1200 Pa to 1500 Pa. When the pressure within the containment space increases to exceed the first threshold, and even opening the second pressure relief valve 5 fails to reduce the pressure and it still exceeds the second threshold, the threshold pressure relief valve 9 automatically opens to work in conjunction with the second pressure relief valve 5 to simultaneously relieve pressure, quickly restoring the positive pressure state within the containment space, thus maintaining the explosion-proof effect and safety.

[0069] Furthermore, in the specific implementation of the explosion-proof positive pressure cabinet for the leak detector provided in this embodiment, the power supply port 14 is connected to a power switch (not shown in the figure) on one side of the containment space; the control unit 7 is electrically connected to the power switch; when the temperature in the containment space exceeds the specified temperature range, the control unit 7 controls the power switch to disconnect; the environmental parameters include at least the temperature in the containment space.

[0070] Understandably, to improve safety, a power switch is provided at the power supply port 14 in this embodiment, and the power switch is electrically connected to the control unit 7. Accordingly, the specified temperature range can be designed and adjusted according to actual needs, for example, -10 degrees to 60 degrees. Once the temperature sensor 62 detects that the temperature inside the containment space is lower than -10 degrees or higher than 60 degrees, the control unit 7 controls the power switch to disconnect, i.e., the power supply to the leak detector. Of course, in this embodiment, it can be further extended to disconnect the power to all devices inside the explosion-proof cabinet 1 except for the detection component 6 and the control unit 7. Accordingly, in this embodiment, a reset switch 15 can be provided outside the explosion-proof cabinet 1. The reset switch 15 is electrically connected to the power switch. When the temperature inside the containment space returns to the above range, the power switch can be manually pressed or turned to drive the power switch to the conducting state, restoring power to the devices inside the explosion-proof cabinet 1.

[0071] Further, see Appendix Figure 4 The explosion-proof positive pressure cabinet for leak detectors provided in this embodiment also includes a display screen 10 in a specific implementation. The display screen 10 is disposed on the third side wall of the explosion-proof cabinet 1. The display screen 10 is signal-connected to the control unit 7 and the detection component 6 to display the detection results of the detection component 6 and the control parameters of the control unit 7.

[0072] It is understandable that, in order to directly obtain the environmental parameters within the containment space, a display screen 10 can be provided in this embodiment. The display screen 10 can be integrated with the control unit 7. The third sidewall corresponding to the display screen 10 can be the same as or different from the sidewall where the first component 12 is located, and can also be the same as or different from the sidewall where the power supply port 14 is located, and can also be the same as or different from the sidewall where the voltage regulating component 3 is located. In this embodiment, at least the display surface of the display screen 10 is exposed to the outside of the explosion-proof cabinet 1. It is easy to understand that the display screen 10 can be sealed with the explosion-proof cabinet 1 in the circumferential direction, which can be, but is not limited to, setting a sealing ring or sealing gasket, etc.; and the real-time detection data of the pressure sensor 61 and the temperature sensor 62 can be displayed intuitively on the display screen 10. As mentioned above, when the temperature recovers to the specified range after power failure, it can be obtained through the display screen 10.

[0073] Further, see Appendix Figure 1 and attached Figure 4 In the specific implementation of the explosion-proof positive pressure cabinet for the leak detector provided in this embodiment, a viewing window 16 is provided on the top of the explosion-proof cabinet 1 and / or on the side wall of the explosion-proof cabinet 1 opposite to the opening and closing door 11. A transparent plate is sealed at the viewing window 16 to display the detection data of the leak detector.

[0074] It is understandable that a leak detector has a display area to show its detection data and results. Therefore, in this embodiment, this area needs to be directly visible from outside the explosion-proof cabinet 1 to obtain the detection results. Thus, a viewing window 16 is provided in this embodiment. The transparent panel at the viewing window 16 can be a transparent glass area or a transparent plastic panel area. The shape and size of the viewing window 16 can be designed and adjusted according to the display area of ​​the leak detector, and can be, but is not limited to, [specific features]. Figure 1 The rectangle in the diagram. It is easy to understand that the transparent panel can be placed inside or outside the explosion-proof cabinet 1. Regardless of whether it is inside or outside, the side facing the explosion-proof cabinet 1 needs to be sealed and bonded around the perimeter of the viewing window 16. In this embodiment, the viewing window 16 can be provided on the top or front surface of the explosion-proof cabinet 1. Of course, refer to the attached diagram... Figure 4 and attached Figure 5 Alternatively, an inclined cabinet surface 18 can be set between the top and front surfaces of the explosion-proof cabinet 1, and a viewing window 16 can be set on the inclined cabinet surface 18 to improve the observation convenience of the staff, so that they do not need to stand on tiptoe to see the top surface or squat down to see the front surface.

[0075] Further, see Appendix Figure 1In the specific implementation of the explosion-proof positive pressure cabinet for the leak detector provided in this embodiment, a plurality of explosion-proof buttons 161 are provided around the viewing window 16 on the explosion-proof cabinet body 1. The explosion-proof buttons 161 are used to actuate the control button of the leak detector (not shown in the figure).

[0076] It is understandable that, in order to realize the detection and control of the leak detector, an explosion-proof button 161 is set in this embodiment. The number and distribution of the explosion-proof button 161 need to be designed and adjusted according to the control button of the leak detector. The explosion-proof button 161 has a contact part both inside and outside the explosion-proof cabinet 1. The outer contact part is used for operation by the staff, and the inner contact part is used to contact the control button of the leak detector, so as to realize the operation and control of the leak detector from outside the explosion-proof positive pressure cabinet, thereby improving safety and convenience.

[0077] Further, see Appendix Figure 4 and attached Figure 5 In the specific implementation of the explosion-proof positive pressure cabinet for leak detector provided in this embodiment, an explosion-proof cover 17 is provided on the explosion-proof cabinet body 1 corresponding to the viewing window 16; the explosion-proof cover 17 is rotatably connected to the explosion-proof cabinet body 1 so that the explosion-proof cover 17 can be flipped to cover the outside of the viewing window 16, and a viewing area 171 is provided on the explosion-proof cover 17 corresponding to the viewing window 16.

[0078] Understandably, to prevent leakage at the viewing window 16 from affecting the explosion-proof effect, an explosion-proof cover 17 can be provided in this embodiment. The explosion-proof cover 17 can be in the form of a cover or a groove, with its opening facing the viewing window 16 to cover it. The explosion-proof cover 17 can be, but is not limited to, made of stainless steel. One edge of the explosion-proof cover 17 can be rotatably connected to the explosion-proof cabinet 1, allowing it to be flipped relative to the explosion-proof cabinet 1 to determine whether or not the viewing window 16 is covered. A locking structure can be provided on the side of the explosion-proof cover 17 opposite to the rotatable connection to cooperate with the explosion-proof cabinet 1 to fix and maintain the explosion-proof cover 17 in the covered state. Correspondingly, in order to see the viewing window 16, a viewing area 171 can be provided on the explosion-proof cover 17. The viewing area 171 can be set in the same way as the viewing window 16, which will not be described in detail here.

[0079] Of course, in this embodiment, two lifting lugs 19 can also be installed at intervals on the top surface of the explosion-proof cabinet 1 to realize the hoisting of the explosion-proof positive pressure cabinet. In this embodiment, two handles 20 can also be installed on opposite sides of the explosion-proof cabinet 1 for lifting or pushing during hoisting or relocation. In this embodiment, a power indicator light 21 can also be installed on the front, which can be electrically connected to the power switch. When the power switch is on, the indicator light is on and the light is off when the power switch is off. In this embodiment, an explosion-proof mark, such as "EX (Explosion-proof)," can also be installed on the inclined cabinet surface 18. In this embodiment, an emergency stop button 22 can also be installed on the inclined cabinet surface 18. The emergency stop button 22 is electrically connected to the control unit 7. When the emergency stop button 22 is pressed, the control unit 7 controls the power switch to disconnect the power supply and perform a power-off operation.

[0080] The embodiments of this disclosure have now been described in detail. To avoid obscuring the concept of this disclosure, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0081] While specific embodiments of this disclosure have been described in detail by way of examples, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of this disclosure. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of this disclosure. In particular, as long as there is no structural conflict, the technical features mentioned in the various embodiments can be combined in any manner.

Claims

1. An explosion-proof positive pressure cabinet for a leak detector, characterized in that, It includes: An explosion-proof cabinet has a accommodating space. One side of the cabinet has an openable door to allow opening or closing of the accommodating space. A first connecting portion and a second connecting portion are provided on the first side wall of the explosion-proof cabinet. The first connecting portion, located on both sides inside and outside the accommodating space, is used to connect the detection port of a leak detector to the test tube column, respectively. The second connecting portion, located on one side inside the accommodating space, is used to connect to the exhaust port of the leak detector, allowing the leak detector to exhaust air out of the explosion-proof cabinet. The first side wall is different from the side where the openable door is located. A support platform is movably disposed within the accommodating space corresponding to the openable door. The support platform can extend or retract into the accommodating space and is used to support the leak detector. A pressure regulating component is disposed on the second side wall of the explosion-proof cabinet. One end of the pressure regulating component is connected to the accommodating space, and the other end is used to detachably connect to a gas source to pressurize the accommodating space and maintain the accommodating space in a positive pressure state. The second side wall is different from the side where the openable door is located. The first pressure relief valve is located on the third side wall of the explosion-proof cabinet. The first pressure relief valve connects the inside and outside of the accommodating space and is normally open.

2. The explosion-proof positive pressure cabinet for leak detectors according to claim 1, characterized in that: It also includes a second pressure relief valve; The second pressure relief valve is disposed on the second side wall. When the pressure in the accommodating space exceeds the first threshold, the second pressure relief valve is controlled to start releasing pressure.

3. The explosion-proof positive pressure cabinet for leak detectors according to claim 2, characterized in that: It also includes detection components and control units; The detection component is disposed within the containment space and is used to collect environmental parameters within the containment space, the environmental parameters including at least the pressure within the containment space; The control unit is signal-connected to the detection component and the second pressure relief valve; When the detection component detects that the pressure in the containment space exceeds the first threshold, the control unit controls the second pressure relief valve to open.

4. The explosion-proof positive pressure cabinet for leak detectors according to claim 2, characterized in that: It also includes alarm devices; The alarm device is installed outside the explosion-proof cabinet and is signal-connected to the control unit. When the detection component detects that the pressure in the containment space exceeds the first threshold, the control unit controls the alarm device to issue an alarm.

5. The explosion-proof positive pressure cabinet for a leak detector according to claim 2, characterized in that: It also includes a threshold pressure relief valve; The threshold pressure relief valve is located on the top of the explosion-proof cabinet. When the pressure in the containment space exceeds the second threshold, the threshold pressure relief valve is activated to release pressure. Wherein, the second threshold is greater than the first threshold.

6. The explosion-proof positive pressure cabinet for a leak detector according to claim 3, characterized in that: The explosion-proof cabinet is equipped with a power supply port, which is located on both sides inside and outside the accommodating space and is used to electrically connect the leak detector and the power supply respectively; and the side of the power supply port inside the accommodating space is connected to a power switch; The control unit is electrically connected to the power switch; When the temperature inside the containment space exceeds the specified temperature range, the control unit controls the power switch to disconnect. The environmental parameters include at least the temperature within the containment space.

7. The explosion-proof positive pressure cabinet for a leak detector according to claim 6, characterized in that: It also includes a display screen; The display screen is mounted on the third side wall of the explosion-proof cabinet. The display screen is signal-connected to the control unit and the detection component to display the detection results of the detection component and the control parameters of the control unit.

8. The explosion-proof positive pressure cabinet for a leak detector according to claim 1, characterized in that: A viewing window is provided on the top of the explosion-proof cabinet and / or on the side wall of the explosion-proof cabinet opposite to the opening and closing door. A transparent plate is sealed at the viewing window to display the detection data of the leak detector.

9. The explosion-proof positive pressure cabinet for a leak detector according to claim 8, characterized in that: The explosion-proof cabinet is provided with several explosion-proof buttons around the viewing window, and the explosion-proof buttons are used to actuate the control buttons of the leak detector.

10. The explosion-proof positive pressure cabinet for a leak detector according to claim 9, characterized in that: The explosion-proof cabinet is equipped with an explosion-proof cover corresponding to the viewing window; The explosion-proof cover is rotatably connected to the explosion-proof cabinet so that the explosion-proof cover can be flipped over and placed over the viewing window. The explosion-proof cover has a viewing area corresponding to the viewing window.

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