Coupled Replaceable Differential Pressure Sensor Assembly for Online Cabinet and Space Operation Box

Abstract

The present invention relates to a coupled replaceable differential pressure sensor assembly for an online cabinet and a space operation box. The coupled replaceable differential pressure sensor assembly for an online cabinet includes a mounting base, a plurality of differential pressure sensors, and an assembly plate. The plurality of differential pressure sensors are respectively assembled on the assembly plate. The two side surfaces of the mounting base are respectively a cabinet connection surface and a sensor connection surface. A limiting boss for limiting and clamping with the side wall of the cabinet is provided in the middle of the cabinet connection surface. The assembly plate is detachably installed on the sensor connection surface. The mounting base is provided with a connection channel for communicating with the external environment of the cabinet, and the plurality of differential pressure sensors are respectively communicated with the connection channel. Since the operation space of the operation cabinet of the online cabinet is limited, by using the coupled replaceable differential pressure sensor assembly for an online cabinet of the present invention, by coupling a plurality of differential pressure sensors on the assembly plate and the mounting base, it is possible to meet the design requirements of replaceability of multiple sensors on the premise of ensuring high reliability during the mechanical process.

Description

Technical Field

[0001] The present invention relates to the technical field of space online cabinets, and particularly relates to a coupled replaceable differential pressure sensor assembly for an online cabinet and a space operation box. Background Art

[0002] With the development of manned spaceflight technology, establishing a long-term inhabited and working environment in outer space has become the focus of the human spaceflight cause. The logistics supply of the International Space Station is extremely expensive and difficult compared to any previous natural exploration activities of mankind. The logistics problems faced in establishing bases on the moon and Mars in the future are even more severe. Especially in the face of emergencies, the losses caused by delays in ground support will be immeasurable. Therefore, considering the initiative of astronauts, enhancing the autonomous maintenance and support capabilities of facilities by providing a series of tools and technical support to personnel is an important measure to solve the logistics supply problem.

[0003] The on-orbit maintenance, adjustment and operation cabinet (hereinafter referred to as the "online cabinet") is a scientific and technical experimental platform planned for the space station application system, mainly providing a workplace for on-orbit fault diagnosis, relay-level maintenance and manual or mechanical operations of the space station payload. The online cabinet can utilize the in-cabin space environmental conditions provided by the manned space station, as well as the on-orbit operation, maintenance and replacement capabilities of astronauts, and carry out on-orbit maintenance, adjustment and operation and experimental research based on external mechanical, electrical, thermal, information, measurement and control and other resource constraints.

[0004] The on-orbit maintenance operation support unit (hereinafter referred to as the "operation box") is the main functional component of the online cabinet system, providing a large-volume, multi-type interface, environmentally controllable enclosed working space to ensure that astronauts can directly participate in some manual on-orbit operations and scientific experiments. To ensure the smooth and safe progress of operations and experiments, it is necessary to study and design the operation box into a system that is observable, measurable, replaceable and controllable during the operation and experimental process. Observable means that astronauts can directly observe the object to be operated and the operation process through the transparent panel of the on-orbit maintenance operation support unit; measurable means that the object to be operated is preliminarily measured by using configured auxiliary equipment (such as a three-dimensional scanner, an intelligent induction maintenance unit, etc.); replaceable means that the devices in the on-orbit maintenance operation support unit can be replaced and freely combined and disassembled according to the needs of operations and experiments; controllable means that the environment (such as light, temperature, gas, etc.) and fine operations (such as the end precision operation of a dexterous manipulator, etc.) in the on-orbit maintenance operation support unit are controllable. The environmental monitoring and the treatment of waste gas and waste particulate matter in the on-orbit maintenance operation support unit are mainly completed by the three-waste treatment unit.

[0005] The differential pressure sensor is an important device for environmental monitoring inside the operation box. Due to the complex system inside the operation box, multiple types of sensors need to be arranged in a limited space, so the space reserved for the differential pressure sensor is very limited. At the same time, a design of using two differential pressure sensors to verify each other is adopted to ensure the accuracy of the output data of the differential pressure sensor. In order to ensure that the system can work for 15 years, a replaceable design is required for the differential pressure sensor. Therefore, in a limited space, two differential pressure sensors are set. On the premise of ensuring high reliability during the mechanical process, it is also necessary to meet the replaceable design requirements. For this demand, there is an urgent need to propose a configuration design that can be replaced and operated in a limited space. Summary of the Invention

[0006] In order to arrange more than one differential pressure sensor in a limited space, the present invention provides a coupled replaceable differential pressure sensor assembly for an on-line cabinet and a space operation box, which meets the replaceable design requirements on the premise of ensuring high reliability during the mechanical process.

[0007] The technical solution of the present invention to solve the above technical problems is as follows: The coupled replaceable differential pressure sensor assembly for an on-line cabinet includes a mounting base, a plurality of differential pressure sensors, and an assembly plate. The plurality of differential pressure sensors are respectively assembled on the assembly plate. The two side surfaces of the mounting base are respectively a box connection surface and a sensor connection surface. A limiting boss for limiting and clamping with the side wall of the box is provided in the middle of the box connection surface. The assembly plate is detachably installed on the sensor connection surface. The mounting base is provided with a connection channel for communicating with the external environment of the box, and the plurality of differential pressure sensors are respectively communicated with the connection channel.

[0008] The beneficial effects of the present invention are as follows: Since the operation space of the box body of the on-line cabinet is limited, by using the coupled replaceable differential pressure sensor assembly of the present invention, by coupling a plurality of differential pressure sensors on the assembly plate and the mounting base, on the premise of ensuring high reliability during the mechanical process, the plurality of sensors meet the replaceable design requirements. By providing a limiting boss in the middle of the box connection surface, it can be limited and clamped with the side wall of the box to achieve stable assembly with the side wall of the box. By designing a connection channel on the mounting base, it is convenient to communicate the differential pressure sensors assembled on the assembly plate and the mounting base with the external environment for differential pressure monitoring.

[0009] On the basis of the above technical solutions, the present invention can be further improved as follows.

[0010] Further, a ventilation hole is provided on the limiting boss of the box connection surface, and a plurality of plunger holes are provided on the sensor connection surface. The ventilation hole and the plurality of plunger holes are respectively communicated with the connection channel, and the plungers of the plurality of differential pressure sensors are respectively assembled in the plurality of plunger holes in a one-to-one correspondence.

[0011] The beneficial effects of adopting the above further scheme are as follows: By providing a vent hole on the limiting boss of the box connection surface, the differential pressure sensor can be connected to the external environment through the plunger hole and the vent hole for differential pressure monitoring.

[0012] Further, an annular sealing groove for assembling a sealing ring is provided on the box connection surface, and the annular sealing groove is arranged around the circumference of the vent hole.

[0013] The beneficial effects of adopting the above further scheme are as follows: By providing an annular sealing groove on the box connection surface, it is convenient to seal the periphery of the vent hole.

[0014] Further, a helping-to-pull mechanism is provided on the side of the assembly plate facing away from the mounting base. The top of the helping-to-pull mechanism is adapted to the sensor connection surface of the mounting base and is used to abut and squeeze the sensor connection surface to move the assembly plate away from the sensor connection surface.

[0015] The beneficial effects of adopting the above further scheme are as follows: By providing a helping-to-pull mechanism, it is convenient to remove the assembly plate from the mounting base.

[0016] Further, the helping-to-pull mechanism further includes a helping-to-pull screw and a restraining screw. A helping-to-pull channel is provided on the assembly plate. One end of the helping-to-pull screw is threadedly connected in the helping-to-pull channel and is connected to the restraining screw. The top is sleeved on the head of the restraining screw with a clearance fit and is used to be pushed out of or retracted into the helping-to-pull channel under the action of the helping-to-pull screw.

[0017] Further, the helping-to-pull mechanism and the differential pressure sensor are located on the same side of the assembly plate.

[0018] Further, the mounting base is made of aluminum alloy, and a stainless steel top block adapted to the top is provided on the sensor connection surface of the mounting base.

[0019] The beneficial effects of adopting the above further scheme are as follows: The mounting base made of aluminum alloy can play a role in weight reduction. By providing a stainless steel top block on the sensor connection surface, it can avoid scratching the mounting base when pulling out the plunger using the helping-to-pull mechanism.

[0020] Further, a plunger assembly hole is provided on the side of the assembly plate for assembling the differential pressure sensor. A plunger flange is provided on the circumferential side wall of the plunger of the differential pressure sensor. The plunger flange is assembled in the plunger assembly hole from the side of the assembly plate facing the mounting base. A threaded adapter block is provided on the side of the plunger flange facing away from the mounting base. The threaded adapter block is sleeved on the circumference of the plunger. One end of the differential pressure sensor is sleeved in the annular gap between the threaded adapter block and the plunger and is threadedly connected to the threaded adapter block.

[0021] The beneficial effects of adopting the above further solution are as follows: By providing a plunger flange and a threaded adapter block, it is beneficial to assemble the plunger on the assembly plate, and it can also make the directions of multiple differential pressure sensors consistent during assembly.

[0022] Further, a support plate is also provided on the assembly plate. The support plate is perpendicularly arranged with respect to the assembly plate, and the differential pressure sensor is fixed on the support plate.

[0023] The beneficial effects of adopting the above further solution are as follows: By providing a support plate, the differential pressure sensor is further positioned and fixed.

[0024] The space operation box includes the above-mentioned online cabinet-coupled replaceable differential pressure sensor assembly, and also includes a box body. An assembly hole is provided on the inner side wall of the box body. The connection surface of the box body is attached to the inner side wall of the box body, and the limiting boss is adaptively limited in the assembly hole. A filter screen covering the assembly hole is provided on the outer side wall of the box body.

[0025] The beneficial effects of the present invention are as follows: The space operation box of the present invention facilitates the assembly of the differential pressure sensor assembly, and by providing a filter screen, impurities are also prevented from entering the connection channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic three-dimensional structure diagram of the split state of the online cabinet-coupled replaceable differential pressure sensor assembly of the present invention Figure 1 ;

[0027] Figure 2 is a schematic three-dimensional structure diagram of the split state of the online cabinet-coupled replaceable differential pressure sensor assembly of the present invention Figure 2 ;

[0028] Figure 3 is a schematic front view structure diagram of the split state of the online cabinet-coupled replaceable differential pressure sensor assembly of the present invention;

[0029] Figure 4 is Figure 3 the schematic cross-sectional structure diagram of B-B in

[0030] Figure 5 is a schematic structure diagram of the online cabinet-coupled replaceable differential pressure sensor assembly assembled in the box body of the present invention.

[0031] In the drawings, the list of components represented by each reference numeral is as follows:

[0032] 400. Mounting base; 401. Limit boss; 402. Connection channel; 403. Ventilation hole; 404. Plunger hole; 405. Annular sealing groove; 406. Pull-out assisting screw; 407. Constraint screw; 408. Top head; 409. Stainless steel top block; 410. Differential pressure sensor; 411. Plunger; 412. Plunger flange; 413. Thread adapter block; 414. Assembly plate; 415. Support plate; 416. Box body; 417. Operation hole; 418. Weight reduction groove; 419. Plunger plug block; 420. Plunger process hole. Detailed implementation mode

[0033] The principles and features of the present invention will be described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not intended to limit the scope of the present invention.

[0034] Example 1

[0035] As Figures 1 to 4 shown, a coupled replaceable differential pressure sensor assembly for an online cabinet in this embodiment includes a mounting base 400, a plurality of differential pressure sensors 410, and an assembly plate 414. The plurality of differential pressure sensors 410 are respectively assembled on the assembly plate 414; both side surfaces of the mounting base 400 are a box body connection surface and a sensor connection surface. A limit boss 401 for limiting and clamping with the side wall of the box body 416 is provided in the middle of the box body connection surface, and the assembly plate 414 is detachably installed on the sensor connection surface; the mounting base 400 is provided with a connection channel 402 for communicating with the external environment of the box body 416, and the plurality of differential pressure sensors 410 are respectively communicated with the connection channel 402. Since the operation space of the box body of the operation box of the online cabinet is limited, by using the coupled replaceable differential pressure sensor assembly for the online cabinet in this embodiment, by coupling a plurality of differential pressure sensors on the assembly plate and the mounting base, it is possible to meet the design requirements of replaceability of multiple sensors on the premise of high reliability in the mechanical process. By providing a limit boss in the middle of the box body connection surface, it can be limited and clamped with the side wall of the box body to achieve stable assembly with the side wall of the box body. By designing a connection channel on the mounting base, it is convenient to communicate the differential pressure sensors assembled on the assembly plate and the mounting base with the external environment for differential pressure monitoring.

[0036] As Figure 4 shown, a ventilation hole 403 is provided on the limit boss 401 of the box body connection surface of this embodiment, and a plurality of plunger holes 404 are provided on the sensor connection surface. The ventilation hole 403 and the plurality of plunger holes 404 are respectively communicated with the connection channel 402, and the plungers 411 of the plurality of differential pressure sensors 410 are respectively assembled in the plurality of plunger holes 404. By providing a ventilation hole on the limit boss of the box body connection surface, the differential pressure sensor can be communicated with the external environment by using the plunger hole and the ventilation hole for differential pressure monitoring.

[0037] As Figure 1 shown, an annular sealing groove 405 for assembling a sealing ring is formed on the box body connection surface of this embodiment, and the annular sealing groove 405 is arranged around the circumference of the air guiding hole 403. By arranging the annular sealing groove on the box body connection surface, it is convenient to seal the periphery of the air guiding hole.

[0038] Specifically, as Figure 1 shown, multiple circles of annular sealing grooves 405 can be arranged on the box body connection surface, and multiple sealing rings are arranged in the multiple circles of annular sealing grooves, so that the box body connection surface is pressed against the box body side wall through the sealing rings, and then the mounting base 400 and the box body side wall are fixedly connected by screws, ensuring the sealing inside and outside the box body and making the sealing effect better.

[0039] As Figures 1 to 4 shown, a helping extraction mechanism is arranged on the side surface of the mounting plate 414 of this embodiment that faces away from the mounting base 400. The top head 408 of the helping extraction mechanism is adapted to the sensor connection surface of the mounting base 400 and is used to abut and squeeze the sensor connection surface to realize the mounting plate 414 moving away from the sensor connection surface. By arranging the helping extraction mechanism, it is convenient to remove the mounting plate from the mounting base.

[0040] As Figures 1 to 4 shown, the helping extraction mechanism of this embodiment further includes a helping extraction screw 406 and a restraining screw 407. A helping extraction channel is arranged on the mounting plate 414. One end of the helping extraction screw 406 is threadedly connected in the helping extraction channel and is connected to the restraining screw 407. The top head 408 is sleeved on the head of the restraining screw 407 with a clearance fit and is used to be pushed out of or retracted into the helping extraction channel under the action of the helping extraction screw 406. The screw head of the helping extraction screw 406 adopts a standard M5 screw head, which is convenient for wrench operation. The top head and the restraining screw have a clearance fit to ensure that the top head will not rotate with the rotation of the helping extraction screw. The top head is arranged in the helping extraction channel and is usually received in the helping extraction channel. During work, it will not rotate with the rotation of the helping extraction screw, and only the thrust in the forward direction is retained.

[0041] As Figures 1 to 4 shown, the helping extraction mechanism and the differential pressure sensor 410 of this embodiment are located on the same side of the mounting plate 414. Specifically, helping extraction mechanisms can be respectively arranged at positions near both ends of the mounting plate 414.

[0042] As Figures 1 to 4As shown, the mounting base 400 of this embodiment is made of aluminum alloy, and a stainless steel top block 409 adapted to the top head 408 is provided on the sensor connection surface of the mounting base 400. The mounting base made of aluminum alloy can reduce weight, and the stainless steel top block is provided on the sensor connection surface to avoid scratches on the mounting base when the plunger is pulled out by the auxiliary pull-out mechanism.

[0043] like Figure 4 As shown, the assembly plate 414 of this embodiment is used to assemble a plunger assembly hole on one side of the differential pressure sensor 410, and a plunger flange 412 is provided on the peripheral side wall of the plunger 411 of the differential pressure sensor 410. The plunger flange 412 is assembled in the plunger assembly hole from the side of the assembly plate 414 toward the mounting base 400, and a threaded adapter block 413 is provided on the side of the plunger flange 412 away from the mounting base 400. The threaded adapter block 413 is sleeved on the peripheral side of the plunger 411, and one end of the differential pressure sensor 410 is sleeved in the annular gap between the threaded adapter block 413 and the plunger 411 and is threadedly connected to the threaded adapter block 413. Since the direction of the threaded interface of the differential pressure sensor cannot be determined, a threaded adapter block is used to convert the uncertain direction into a determined flange + threaded hole form through matching processing and conversion, which is convenient for subsequent assembly. The plunger flange and the threaded adapter block are provided to facilitate assembly of the plunger on the assembly plate, and multiple differential pressure sensors can also be assembled in the same direction.

[0044] like Figures 1 to 4 As shown, in this embodiment, a support plate 415 is further provided on the assembly plate 414, and the support plate 415 is arranged vertically with the assembly plate 414, and the differential pressure sensor 410 is fixed on the support plate 415. By providing the support plate, the differential pressure sensor is further positioned and fixed.

[0045] like Figure 2 As shown, the mounting base 400 of this embodiment is also provided with a plurality of weight-reducing grooves 418 to facilitate overall weight reduction. Figure 4 As shown, the assembly plate 414 of this embodiment is further provided with a plunger process hole 420 connected to the connecting channel 402, and a plunger plug block 419 sealed by a double O-ring is provided in the plunger process hole 420.

[0046] The function of the coupled replaceable differential pressure sensor assembly for the online cabinet in this embodiment is to monitor the differential pressure between the internal and external environments of the space operation box. According to the monitored differential pressure data and the pre-set control strategy, the on-off of the charging and discharging valves is controlled to keep the differential pressure between the internal and external of the space operation box within the allowable range. Generally, two differential pressure sensors are used, namely the main differential pressure sensor and the spare differential pressure sensor. The two differential pressure sensors are installed at adjacent positions on the assembly plate to ensure that the measured differential pressure value is minimally affected by the installation position.

[0047] Embodiment 2

[0048] As Figure 5 shown, the space operation box of this embodiment includes the coupled replaceable differential pressure sensor assembly for the online cabinet, and also includes a box body 416. An assembly hole is provided on the inner side wall of the box body 416. The box body connection surface is attached to the inner side wall of the box body 416, and the limiting boss 401 is fitted and limited in the assembly hole. A filter screen covering the assembly hole is provided on the outer side wall of the box body 416. The filter screen can prevent large particle debris from entering the differential pressure sensor and affecting the test accuracy.

[0049] Specifically, as Figure 5 shown, it can be seen from Figure 5 that there are many components around the differential pressure sensor, and most of them are non-removable after installation. Therefore, the available space for the internal layout of the space operation box is very limited. An operation hole 417 is provided on the front side of the box body 416 of the space operation box. Since the operation hole 417 is very small and generally requires one-handed operation, by integrating the dual differential pressure sensor 410, it is convenient for the assembly and replacement of the differential pressure sensor assembly inside the box body 416. An activity partition is generally provided at the operation hole 417. By opening the activity partition, the dual differential pressure sensor 410 inside the box can be disassembled and assembled through the operation hole 417.

[0050] In the space operation box of this embodiment, the differential pressure sensor assembly moves upward with the online cabinet. During the test, if the deviation between the differential pressure values of the two groups of differential pressure sensors is too large and exceeds a certain preset limit value, it is considered that the differential pressure sensor assembly needs to be disassembled. The specific disassembly steps are as follows: Use a wrench to disassemble the activity partition of the space operation box, and then through the operation hole, first remove the electrical connector, and then unlock each non-loosening screw. At this time, since the plunger seal is inserted into the plunger hole with a large resistance, the astronaut cannot easily pull it out. A helping extraction mechanism needs to be used to lift the entire differential pressure sensor assembly as a whole to take out the entire differential pressure sensor assembly. After disassembly, a new differential pressure sensor assembly needs to be installed. The specific installation steps are as follows: Take out the new differential pressure sensor assembly, identify the R point of the differential pressure sensor disassembly and assembly component (as Figure 1 shown), and the R point of the differential pressure sensor installation base (as Figure 2As shown, align the two R points, then fully insert the two sets of double O plungers on the two differential pressure sensors into the two sets of plunger holes of the mounting base of the differential pressure sensor, then tighten the non-loosening screws, install the electrical connector of the new differential pressure sensor assembly, and install the movable partition plate.

[0051] The space operation box of this embodiment facilitates the assembly of the differential pressure sensor assembly, and by setting the filter screen, it also prevents impurities from entering the connection channel.

[0052] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0053] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0054] In the present invention, unless otherwise clearly specified and defined, the terms "install", "connect", "connect", "fix", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] In the present invention, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is less than that of the second feature.

[0056] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0057] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. Coupled replaceable differential pressure sensor assembly for online cabinets, Characterized in that, It includes an installation base, multiple differential pressure sensors and an assembly plate, and the multiple differential pressure sensors are respectively assembled on the assembly plate; both side surfaces of the installation base are a cabinet connection surface and a sensor connection surface, a limiting boss for limiting and clamping with the side wall of the cabinet is provided in the middle of the cabinet connection surface, and the assembly plate is detachably installed on the sensor connection surface; the installation base is provided with a connection channel for communicating with the external environment of the cabinet, and the multiple differential pressure sensors are respectively communicated with the connection channel; A helping extraction mechanism is provided on one side surface of the assembly plate facing away from the installation base, and the top of the helping extraction mechanism is adapted to the sensor connection surface of the installation base and is used for abutting and squeezing the sensor connection surface to realize the assembly plate moving away from the sensor connection surface.

2. The coupled replaceable differential pressure sensor assembly for online cabinets according to claim 1, Characterized in that, A ventilation hole is provided on the limiting boss of the cabinet connection surface, multiple plunger holes are provided on the sensor connection surface, the ventilation hole and the multiple plunger holes are respectively communicated with the connection channel, and the plungers of the multiple differential pressure sensors are respectively assembled in the multiple plunger holes in a one-to-one correspondence.

3. The coupled replaceable differential pressure sensor assembly for online cabinets according to claim 2, Characterized in that, An annular sealing groove for assembling a sealing ring is provided on the cabinet connection surface, and the annular sealing groove is arranged around the ventilation hole.

4. The coupled replaceable differential pressure sensor assembly for online cabinets according to claim 1, Characterized in that, The helping extraction mechanism further includes a helping extraction screw and a constraint screw, a helping extraction channel is provided on the assembly plate, one end of the helping extraction screw is threadedly connected in the helping extraction channel and is connected with the constraint screw, and the top is sleeved on the head of the constraint screw with a clearance fit and is used for being pushed out or retracted into the helping extraction channel under the action of the helping extraction screw.

5. The coupled replaceable differential pressure sensor assembly for online cabinets according to claim 1, Characterized in that, The helping extraction mechanism and the differential pressure sensor are on the same side of the assembly plate.

6. The coupled replaceable differential pressure sensor assembly for online cabinets according to claim 1, Characterized in that, The installation base is made of aluminum alloy material, and a stainless steel top block adapted to the top is provided on the sensor connection surface of the installation base.

7. The coupled replaceable differential pressure sensor assembly for online cabinets according to claim 1, Characterized in that, Plunger assembly holes are provided on one side surface of the assembly plate for assembling the differential pressure sensor, a plunger flange is provided on the peripheral side wall of the plunger of the differential pressure sensor, the plunger flange is assembled in the plunger assembly hole from the side of the assembly plate facing the installation base, a threaded adapter block is provided on the side surface of the plunger flange facing away from the installation base, the threaded adapter block is sleeved on the periphery of the plunger, and one end of the differential pressure sensor is sleeved in the annular gap between the threaded adapter block and the plunger and is threadedly connected with the threaded adapter block.

8. The coupled replaceable differential pressure sensor assembly for online cabinets according to claim 1, Characterized in that, a support plate is further provided on the assembly plate, the support plate is vertically arranged with the assembly plate, and the differential pressure sensor is fixed on the support plate.

9. Space operation box, Characterized in that, comprising the on-line cabinet-coupled replaceable differential pressure sensor assembly according to any one of claims 1 to 8, further comprising a box body, an assembly hole is provided on the inner side wall of the box body, the connection surface of the box body is attached to the inner side wall of the box body, and the limit boss is fitted and limited in the assembly hole, and a filter screen covering the assembly hole is provided on the outer side wall of the box body.

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