Windproof pressing device of liquid rocket

Abstract

The utility model relates to the technical field of space flight and aviation, in particular to a wind-proof pressing device of a liquid rocket, which comprises a wind-proof pressing support, a telescopic piece shell, an adjusting screw rod device and a spring bolt, the inner end of the windproof pressing support is used for being fixedly connected with the side face, close to the top end, of the spiral lifting equipment, and the upper end of the windproof pressing support is fixedly connected with the lower end of the telescopic piece shell. The spring bolt is fixedly connected with the end of an adjusting lead screw of the adjusting lead screw equipment, the spring bolt and the adjusting lead screw equipment extend into the telescopic piece shell from the outer end of the telescopic piece shell, and the spring bolt can extend out of the telescopic piece shell to be inserted into a fixing hole of a rocket launching supporting leg at the top end of the spiral lifting equipment. And the shell of the adjusting screw rod equipment is fixedly connected with the outer end of the shell of the telescopic piece. The supporting stability of the movable launching pad on the liquid rocket can be improved, the influence of wind load on the vertical state of the liquid rocket is avoided, and it is guaranteed that the liquid rocket can be successfully launched.

Description

TECHNICAL FIELD

[0001] The present application relates to the aerospace technology field, and in particular to a wind pressure prevention device for a liquid rocket. BACKGROUND

[0002] At present, liquid rockets have been widely used in the field of spaceflight in China due to their relatively simple structure, convenience for repeated use design and recycling technology research and development, and good carrying capacity and stable working state.

[0003] However, since the propellant of the liquid rocket usually has corrosive and toxic properties, and needs to be accurately filled before launch, the liquid rocket needs to be equipped with a movable launch platform to support it. Since the movable launch platform is equipped with a special propellant filling system and pipeline, it can safely and accurately perform propellant filling operations in the rocket standing state, and can also easily perform propellant discharge operations if problems occur before launch. In addition, since the liquid rocket needs to be connected to a large number of devices, detected and debugged before launch, the movable launch platform has various cable, gas and liquid pipeline connection facilities connected to each system of the rocket, which facilitates technicians to detect and troubleshoot, and ensures that each system of the rocket works normally.

[0004] However, since the rocket may bear a large wind load after being erected, the stability of the movable launch platform supporting the rocket needs to be ensured to avoid the wind load affecting the vertical state of the rocket and to ensure the successful launch of the liquid rocket.

[0005] Therefore, how to improve the stability of the movable launch platform supporting the liquid rocket, avoid the wind load affecting the vertical state of the liquid rocket, and ensure the successful launch of the liquid rocket is a technical problem that needs to be solved by the technical personnel in the field at present. SUMMARY

[0006] The present application provides a wind pressure prevention device for a liquid rocket to improve the stability of the movable launch platform supporting the liquid rocket, avoid the wind load affecting the vertical state of the liquid rocket, and ensure the successful launch of the liquid rocket.

[0007] To solve the above technical problems, the present application provides the following technical solutions:

[0008] The wind pressure preventing device for liquid rocket comprises a wind pressure preventing support, an extension shell, an adjusting screw device and a lock tongue. The inner end of the wind pressure preventing support is fixedly connected with the side near the top end of the screw lifting device, and the upper end of the wind pressure preventing support is fixedly connected with the lower end of the extension shell. The lock tongue is fixedly connected with the end of the adjusting screw of the adjusting screw device, and the lock tongue and the adjusting screw device are extended into the extension shell from the outer end of the extension shell. The lock tongue can be extended out of the extension shell and inserted into the fixed hole of the rocket launching leg placed on the top end of the screw lifting device. The shell of the adjusting screw device is fixedly connected with the outer end of the extension shell.

[0009] The wind pressure preventing device for liquid rocket as described above, wherein, preferably, the outer end of the extension shell is fixedly connected with a mounting plate, and the shell of the adjusting screw device is fixedly connected with the mounting plate of the outer end of the extension shell.

[0010] The wind pressure preventing device for liquid rocket as described above, wherein, preferably, the mounting plate extends downward and contacts the outer end of the wind pressure preventing support.

[0011] The wind pressure preventing device for liquid rocket as described above, wherein, preferably, the lower part of the inner end of the wind pressure preventing support is fixedly connected with the side near the top end of the screw lifting device, and the upper part of the inner end of the wind pressure preventing support is placed on the top end of the wind pressure preventing support and is not subjected to pressure.

[0012] The wind pressure preventing device for liquid rocket as described above, wherein, preferably, the lower part of the inner end of the wind pressure preventing support is integrally formed with the side near the top end of the screw lifting device.

[0013] The wind pressure preventing device for liquid rocket as described above, wherein, preferably, the lower end surface of the wind pressure preventing support is gradually inclined upward from inside to outside.

[0014] The wind pressure preventing device for liquid rocket as described above, wherein, preferably, the lock tongue has a through locking hole on the part near the outer side, and the lock tongue is inserted into the fixed hole of the rocket launching leg. The locking hole is located on the side of the rocket launching leg away from the adjusting screw device, and the locking rod is inserted into the locking hole.

[0015] The wind pressure preventing device for liquid rocket as described above, wherein, preferably, the screw lifting device comprises a pressure sensor, a support disc and a screw lifting device body which can be extended upward and downward. The lower end of the screw lifting device body is fixedly connected with the movable launching platform, the upper end of the screw lifting device body is fixedly connected with the lower end of the support disc, the upper end of the support disc is fixedly connected with the lower end of the pressure sensor, and the upper end of the pressure sensor is used to support the rocket launching leg.

[0016] The wind pressure preventing device of the liquid rocket as described above, wherein preferably, the inner end of the wind pressure preventing support is fixedly connected with the side surface of the supporting disc.

[0017] The wind pressure preventing device of the liquid rocket as described above, wherein preferably, the pressure sensor is in a stepped shape, the small end surface of which is the pressure sensing surface; the lower part of the inner end of the wind pressure preventing support is fixedly connected with the side surface of the supporting disc, and the upper part of the inner end of the wind pressure preventing support is placed on the stepped surface of the pressure sensor.

[0018] In view of the above background, the wind pressure preventing device of the liquid rocket provided by the present application can improve the stability of the movable launching platform in supporting the liquid rocket, avoid the influence of wind load on the vertical state of the liquid rocket, and ensure the successful launching of the liquid rocket. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art based on these drawings.

[0020] Figure 1 is the overall structure diagram of the liquid rocket launching platform provided by the present application;

[0021] Figure 2 is the bottom structure diagram of the movable launching platform of the liquid rocket launching platform provided by the present application;

[0022] Figure 3 is the top structure diagram of the movable launching platform of the liquid rocket launching platform provided by the present application;

[0023] Figure 4 is the equipment arrangement diagram of the movable launching platform of the liquid rocket launching platform provided by the present application;

[0024] Figure 5 is the structure diagram of the wind pressure preventing mechanism of the liquid rocket launching platform provided by the present application;

[0025] Figure 6 is the arrangement diagram of the wind pressure preventing mechanism of the liquid rocket launching platform provided by the present application. DETAILED DESCRIPTION

[0026] Embodiments of the present application are described in detail below with reference to the attached drawing figures, wherein like or similar constituent elements or features may be denoted by like reference characters, and. The embodiments described below are presented by way of example only, and are not intended to limit the present application as aspects of the present application can be implemented in a variety of ways.

[0027] As shown in Figure 1 , the present application provides a liquid rocket launching platform, comprising a fixed launching platform 110, a movable launching platform 120, a plurality of helical lifting devices 130, a plurality of helical supporting devices 140 and a plurality of wind pressure preventing devices 150 (as shown in Figure 4 ).

[0028] The bottom surface of the fixed launching platform 110 is used to be fixed to the ground, and the fixed launching platform 110 has flow guiding holes (not shown in the figure) penetrating from the top surface to the bottom surface, and the flow guiding holes of the fixed launching platform 110 correspond to flow guiding channels on the ground. The bottom surface of the movable launching platform 120 is fixedly connected to the top surface of the fixed launching platform 110, and the movable launching platform 120 has flow guiding holes 121 penetrating from the top surface to the bottom surface, and the flow guiding holes 121 on the movable launching platform 120 correspond to the flow guiding holes on the fixed launching platform 110, so that when the rocket is launched, the rocket exhaust passes through the flow guiding holes of the movable launching platform 120, then passes through the flow guiding holes of the fixed launching platform 110, and finally is ejected from the flow guiding channels on the ground.

[0029] As shown in Figure 2 , the bottom surface of the movable launching platform 120 is fixedly connected to the top surface of the fixed launching platform 110 by a plurality of groups of bolts, and the movable launching platform 120 is arranged to span the flow guiding holes of the fixed launching platform 110. Optionally, the bottom surface of the movable launching platform 120 is fixedly connected to the top surface of the fixed launching platform 110 by 16 groups of bolts. Further optionally, the bottom surface of the movable launching platform 120 is fixedly connected with 16 pad plates 122, each of which is provided with two connecting holes penetrating into the inside of the movable launching platform 120, and the top surface of the fixed launching platform 110 is also provided with corresponding connecting holes, and mounting bolts (not shown in the figure) pass through the connecting holes of the movable launching platform 120 and the connecting holes of the fixed launching platform 110, so as to fixedly connect the bottom surface of the movable launching platform 120 and the top surface of the fixed launching platform 110 together. Yet optionally, all the pad plates 122 are divided into two groups, and each group of pad plates 122 is located at one long side of the movable launching platform 120.

[0030] As shown in Figure 2 and Figure 3As shown, the side of the movable launching platform 120 has outwardly extending positioning ears 123 with positioning holes extending therethrough, and the top of the fixed launching platform 110 has corresponding positioning holes. When the movable launching platform 120 and the fixed launching platform 110 are docked, positioning bolts (not shown) are passed through the positioning holes of the movable launching platform 120 and the positioning holes of the fixed launching platform 110, thereby achieving positioning when the movable launching platform 120 and the fixed launching platform 110 are docked. Alternatively, both sides of the movable launching platform 120 have two positioning ears 123, and the two positioning ears 123 on the same side are spaced apart, thereby positioning from different directions to make the positioning more accurate and avoid installation errors.

[0031] On the basis of the above, the movable launching platform 120 preferably has three side-by-side flow guide holes 121, so that the three flow guide holes 121 of the movable launching platform 120 can correspond to the core I rocket body and the two boost rocket bodies on the left and right sides of the core I rocket body. The fixed launching platform 110 can also have three side-by-side flow guide holes, and the three flow guide holes of the fixed launching platform 110 correspond to the three flow guide holes 121 of the movable launching platform 120. Alternatively, the fixed launching platform 110 can also have one flow guide hole, and the one flow guide hole of the fixed launching platform 110 corresponds to the three flow guide holes 121 of the movable launching platform 120. Alternatively, each flow guide hole 121 of the movable launching platform 120 is a regular hexagonal hole. Alternatively, the movable launching platform 120 is a rectangular box structure made of steel plates and has overall parameters meeting the requirements of road transportation. Hydraulic equipment and its accessories are installed in the compartments inside the movable launching platform 120. The hydraulic equipment, pipelines, and accessories are installed in the compartments of the movable launching platform 120, which can provide reliable protection for the hydraulic equipment, pipelines, and accessories to prevent ablation of these equipment during rocket launching. Alternatively, a manhole is provided on the top of the movable launching platform 120, and the manhole is located on the two short sides of the movable launching platform 120 to facilitate the arrangement of hydraulic pipelines in the compartments on the long sides.

[0032] As shown in Figure 4 The lower ends of the spiral lifting equipment 130 and the spiral support equipment 140 are fixedly installed to the top of the movable launching platform 120 and distributed around the flow guide holes 121. In order to install the spiral lifting equipment 130 and the spiral support equipment 140, the top of the movable launching platform 120 has a downwardly recessed first installation groove 124 and a second installation groove 125, and the first installation groove 124 and the second installation groove 125 are distributed around the flow guide holes 121. The spiral lifting equipment 130 is installed in the first installation groove 124, and the spiral support equipment 140 is installed in the second installation groove 125.

[0033] Optionally, the periphery of the regular hexagonal flow guide hole 121 has two first mounting grooves 124 and four second mounting grooves 125; and the two first mounting grooves 124 are respectively located at the periphery of the opposite two sides of the regular hexagonal flow guide hole 121 and at the two long side of the movable launching platform 120, and the four second mounting grooves 125 are respectively located at the periphery of the other four sides of the regular hexagonal flow guide hole 121, so as to arrange two spiral lifting devices 130 and four spiral supporting devices 140 around the regular hexagonal flow guide hole 121. Further optionally, the adjacent second mounting grooves 125 of two adjacent regular hexagonal flow guide holes 121 are communicated as a whole, so as to facilitate the welding processing of the movable launching platform 120. Yet further optionally, the depth of the second mounting groove 125 is deeper than the depth of the first mounting groove 124, so that the lower part of the first mounting groove 124 still has a larger cabin, facilitating the arrangement of equipment in the cabin and the shuttle of operators between the cabins.

[0034] The spiral lifting device 130 can be telescoped up and down, and the top of the spiral lifting device 130 can monitor the pressure, and after the rocket is erected, the spiral lifting device 130 is lifted and supported under the rocket launching leg 200, and the height of the spiral lifting device 130 is adjusted according to the monitored pressure, so as to realize the leveling of the rocket. The leveling is based on three-point leveling, which can reduce the leveling difficulty, and the weight of each rocket body is different, the core I rocket body is leveled first, and then the boost rocket body is leveled, so as to ensure the coordination between the rocket bodies.

[0035] The spiral supporting device 140 can also be telescoped up and down, and after leveling, the spiral supporting device 140 is lifted and supported under the rocket launching leg 200 according to the height of the spiral lifting device 130, so as to ensure that the rocket can be reliably vertically erected on the movable launching platform 120. Optionally, each spiral lifting device 130 and spiral supporting device 140 has a pull wire sensor (not shown in the figure), which can accurately output the height data of the corresponding device, and according to the height data of the spiral lifting device 130, the height of the spiral supporting device 140 is determined.

[0036] The shell of the windproof pressing device 150 is fixedly connected to the part close to the top of the screw lifting device 130, the telescopic part of the windproof pressing device 150 is located obliquely above the screw lifting device 130, and the telescopic part of the windproof pressing device 150 can be extended to the top of the screw lifting device 130 to be inserted into the fixing hole of the rocket launching leg 200 placed on the top of the screw lifting device 130, so that the rocket launching leg 200 is locked by the windproof pressing device 150 after the screw lifting device 130 supports and levels the rocket launching leg 200, thereby pressing the rocket body, sharing the wind load when the rocket body is subjected to the wind load, avoiding the position of the rocket body from changing under the action of the wind load, and further avoiding the rocket body from overturning; and the telescopic part of the windproof pressing device 150 can be retracted from the top of the screw lifting device 130 to be pulled out of the fixing hole of the rocket launching leg 200 placed on the top of the screw lifting device 130, so as to unlock the rocket launching leg 200 before the rocket is launched.

[0037] As shown in Figure 5 The screw lifting device 130 includes a pressure sensor 131, a support disc 132 and a screw lifting device body 133 which can be telescoped up and down; the lower end of the screw lifting device body 133 is used for fixedly connecting with the movable launching platform 120, the upper end of the screw lifting device body 133 is fixedly connected with the lower end of the support disc 132, the upper end of the support disc 132 is fixedly connected with the lower end of the pressure sensor 131, and the upper end of the pressure sensor 131 is used for supporting the rocket launching leg 200. Optionally, the lower end of the support disc 132 is fixedly connected with the upper end of the screw lifting device body 133 through a threaded structure, and the upper end of the support disc 132 is fixedly connected with the pressure sensor 131 through a bolt. Specifically, the top surface of the support disc 132 has a fixed threaded hole, the pressure sensor 131 is in a stepped shape, the small end surface thereof is a pressure sensing surface, the stepped surface thereof has an upper and lower through fixed connection hole, the bolt passes through the fixed bolt hole of the pressure sensor 131 and is screwed into the fixed threaded hole of the support disc 132, so as to realize the fixed connection of the support disc 132 and the pressure sensor 131.

[0038] The windproof pressing device 150 comprises a windproof pressing support 151, an extension member housing 152, an adjusting screw rod device 153 and a lock tongue 154. The inner end of the windproof pressing support 151 is fixedly connected with the side of the support disc 132. The upper end of the windproof pressing support 151 is fixedly connected with the lower end of the extension member housing 152. The lock tongue 154 is fixedly connected with the end of the adjusting screw rod of the adjusting screw rod device 153, and the lock tongue 154 and the adjusting screw rod of the adjusting screw rod device 153 are extensions and extend into the extension member housing 152 from the outer end of the extension member housing 152. The housing of the adjusting screw rod device 153 is fixedly connected with the outer end of the extension member housing 152. In this way, under the drive of the adjusting screw rod of the adjusting screw rod device 153, the lock tongue 154 can extend out of the extension member housing 152 and be inserted into the fixing hole of the rocket launching leg 200 placed on the pressure sensor 131. The windproof pressing support 151 is installed on the side of the support disc 132, and the upper end of the support disc 132 is installed with the pressure sensor 131. This installation mode can ensure that the force of the windproof pressing support 151 is not transmitted to the pressure sensor 131, so that the pressure measured by the pressure sensor 131 is completely the force transmitted by the rocket launching leg 200.

[0039] Optionally, the outer end of the extension member housing 152 is fixedly connected with a mounting plate 1521, and the housing of the adjusting screw rod device 153 is fixedly connected with the mounting plate 1521 at the outer end of the extension member housing 152. Further optionally, the mounting plate 1521 extends downward and is in contact with the outer end of the windproof pressing support 151, so that part of the force of the windproof pressing device 150 can be transmitted to the screw lifting device 130 through the windproof pressing support 151. Still further optionally, the lower part of the inner end of the windproof pressing support 151 is fixedly connected with the side of the support disc 132. Since the stepped surface of the pressure sensor 131 does not sense pressure, the upper part of the inner end of the windproof pressing support 151 is placed on the stepped surface of the pressure sensor 131, so that the force of the windproof pressing device 150 can be transmitted to the screw lifting device 130 from the vertical direction and the horizontal direction. Still further optionally, the lower part of the inner end of the windproof pressing support 151 is integrally formed with the side of the support disc 132, that is, the windproof pressing support 151 and the support disc 132 are an integral structure. Further optionally, the lower end surface of the windproof pressing support 151 gradually inclines upward from inside to outside, so that the windproof pressing support 151 is wedge-shaped. Still further optionally, the part of the lock tongue 154 close to the outer side has a through locking hole. Here, the "close to the outer side" refers to the side of the lock tongue 154 away from the adjusting screw rod of the adjusting screw rod device 153. After the lock tongue 154 is inserted into the fixing hole of the rocket launching leg 200, the locking hole is located on the side of the rocket launching leg 200 away from the adjusting screw rod device 153, and then a locking rod is inserted into the locking hole to prevent the lock tongue 154 from being pulled out of the fixing hole of the rocket launching leg 200.

[0040] The screw supporting device 140 comprises a supporting disc and a screw supporting device body which can be extended and retracted up and down; the lower end of the screw supporting device body is used for fixed connection with the mobile launching platform 120, the upper end of the screw supporting device body is fixedly connected with the lower end of the supporting disc, and the upper end of the supporting disc is used for supporting the rocket launching leg 200. Optionally, the lower end of the supporting disc is fixedly connected with the upper end of the screw supporting device body through a threaded structure.

[0041] When the liquid rocket launching platform of the present application is used, the following procedures are as follows:

[0042] (1) Before the rocket body is erected, all the screw lifting devices 130 and the screw supporting devices 140 are lowered, and all the wind pressure tightening devices 150 are opened.

[0043] (2) After the rocket body is erected in place, all the screw lifting devices 130 are lifted to a specified stroke, and the lifting stroke is judged according to the pull line sensor of all the screw lifting devices 130, and the reading of the pressure sensor 131 is taken as the reference data.

[0044] (3) The values of all the pressure sensors 131 are read, and the value of a single pressure sensor 131 in the lifting process should not exceed the maximum load that can be borne by a single rocket launching leg 200 (for example, 187.5 tons is provided on the rocket).

[0045] (4) According to the reading of the pressure sensor 131, the whole rocket is leveled (if necessary), and then the lower clamping jaws of the erecting frame are opened and retracted to the position.

[0046] (5) The wind pressure tightening device 150 is in place, and the rocket launching leg 200 is locked.

[0047] (6) All the screw supporting devices 140 are lifted to a specified stroke and supported at the corresponding rocket launching leg 200, and the lifting height is the height of the pull line sensor of the screw lifting device 130 after leveling (or the height of the pull line sensor is calculated according to the interpolation result).

[0048] (7) Add fuel as needed.

[0049] (8) Ten minutes before launching, the wind pressure tightening device 150 is opened.

[0050] It will be obvious to a person skilled in the art that the application is not limited to the details of the foregoing exemplary embodiments and can be implemented in other concrete forms without departing from the spirit or essential characteristics of the application. The embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. No reference signs in the claims should be considered as limiting the scope of the claims to the identity of the reference signs therein.

[0051] Furthermore, it should be understood that although the description is made on the basis of the embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A wind pressure prevention device for a liquid rocket, characterized by comprising: The utility model relates to a rocket launching support device, which comprises a windproof compression support, a telescopic part shell, an adjusting screw device and a lock tongue. The inner end of the windproof compression support is fixedly connected to the side surface near the top end of the screw lifting device, and the upper end of the windproof compression support is fixedly connected to the lower end of the telescopic part shell. The lock tongue is fixedly connected to the end of the adjusting screw of the adjusting screw device, and the lock tongue and the adjusting screw device are extended into the telescopic part shell from the outer end of the telescopic part shell, and the lock tongue can be extended out of the telescopic part shell and inserted into the fixed hole of the rocket launching support leg placed on the top end of the screw lifting device. The shell of the adjusting screw device is fixedly connected to the outer end of the telescopic part shell. The outer end of the telescopic part shell is fixedly connected with a mounting plate, and the shell of the adjusting screw device is fixedly connected to the mounting plate at the outer end of the telescopic part shell.

2. The wind pressure prevention device for a liquid rocket according to claim 1, characterized by The mounting plate extends downward and contacts the outer end of the windproof compression support.

3. The wind pressure prevention device for a liquid rocket according to claim 2, characterized by The lower part of the inner end of the windproof compression support is fixedly connected to the side surface near the top end of the screw lifting device, and the upper part of the inner end of the windproof compression support is placed on the top end of the windproof compression support and is not subjected to pressure.

4. A wind pressure prevention device for a liquid rocket according to any one of claims 1 to 3, characterized by The lower part of the inner end of the windproof compression support is integrally formed with the side surface near the top end of the screw lifting device.

5. The wind pressure prevention device for a liquid rocket according to claim 4, characterized by The lower end surface of the windproof compression support gradually inclines upward from the inside to the outside.

6. A wind pressure prevention device for a liquid rocket according to any one of claims 1 to 3, characterized by The part near the outer side of the lock tongue has a through locking hole.

7. A wind pressure prevention device for a liquid rocket according to any one of claims 1 to 3, characterized by When the lock tongue is inserted into the fixed hole of the rocket launching support leg, the locking hole is located on the side of the rocket launching support leg away from the adjusting screw device, and the locking rod is inserted into the locking hole. The screw lifting device comprises a pressure sensor, a support disc and a screw lifting device body that can be extended upward and downward.

8. A wind pressure prevention device for a liquid rocket according to any one of claims 1 to 3, characterized by The lower end of the screw lifting device body is fixedly connected to the movable launching platform, the upper end of the screw lifting device body is fixedly connected to the lower end of the support disc, the upper end of the support disc is fixedly connected to the lower end of the pressure sensor, and the upper end of the pressure sensor is used for supporting the rocket launching support leg. The inner end of the windproof compression support is fixedly connected to the side surface of the support disc.

9. The wind pressure protection device for a liquid rocket according to claim 8, wherein The pressure sensor is in a stepped shape, and the small end surface is a pressure sensing surface.

10. The wind pressure prevention device for a liquid rocket according to claim 9, wherein The lower part of the inner end of the windproof compression support is fixedly connected to the side surface of the support disc, and the upper part of the inner end of the windproof compression support is placed on the stepped surface of the pressure sensor. ​

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