CN210499880U

CN210499880U - Sealing clamp for airspeed tube

Info

Publication number: CN210499880U
Application number: CN201921005504.7U
Authority: CN
Inventors: 刘革伟; 张俊庸; 王卫东
Original assignee: Changsha 5712 Aircraft Industry Co ltd
Current assignee: Changsha 5712 Aircraft Industry Co ltd
Priority date: 2019-06-28
Filing date: 2019-06-28
Publication date: 2020-05-12
Anticipated expiration: 2029-06-28

Abstract

The utility model discloses a sealed anchor clamps for airspeed tube, including the barrel, be used for docking on the airspeed tube the static pressure hole gas of first static pressure hole chew and be used for docking dynamic pressure hole gas on the airspeed tube and chew, be equipped with on the inner wall of barrel and separate the ring, separate the ring and fall into first die cavity and second die cavity with the inner space of barrel, the static pressure hole gas is chewed and is installed on the lateral wall of barrel, dynamic pressure hole gas is chewed and is installed the one end at the barrel, is equipped with the first sealing washer that is used for sealed airspeed tube to leak rain hole in the first die cavity, is equipped with in the second die cavity and is used for sealing the second sealing washer of second static pressure hole on the airspeed. This sealing clamp for airspeed tube simple structure, convenient operation and sealed effectual.

Description

Sealing clamp for airspeed tube

Technical Field

The utility model relates to an aircraft maintenance technical field especially relates to a sealing clamp for airspeed tube.

Background

In the process of aircraft maintenance, a speed measuring system including an airspeed head needs to be tested for static pressure performance, and if necessary, whether a flight airspeed meter, a flight altimeter and connected accessory systems in an aircraft cabin are intact or not needs to be specially detected. The flight airspeed meter is connected with a dynamic pressure hole on the aircraft airspeed tube through a pipeline system, and the flight altimeter is connected with a static pressure hole on the aircraft airspeed tube through the pipeline system. When the ordinary sealing performance test is carried out, the relevant static pressure holes on the airspeed tube need to be sealed and vacuumized for inspection, and when the special performance test is carried out, the relevant static pressure holes on the airspeed tube need to be sealed and then connected with dynamic and static pressure measurement equipment for detection. At present, dynamic pressure and static pressure performance tests are carried out by separating dynamic pressure and static pressure for sealing, a proper rubber tube is directly used for dynamic pressure sealing, one end of the rubber tube clamps an air nozzle by a clamp, and the other end of the rubber tube is directly sleeved on an airspeed tube and clamped by the clamp; static pressure sealing is difficult, and at present, there are three types of sealing clamps:

the first is a clamp type: the rubber gasket is lined in the hoop, the hoop is sleeved at the small hole of the airspeed tube, and the tightening hoop can seal the small hole and is not suitable for sealing the small hole on the conical surface of the airspeed tube.

The second is in the form of an O-ring: an inner cylinder with an air nozzle is made, a plurality of O-shaped rings with corresponding sizes are placed in the inner cylinder and are separated by lining rings, a blocking cover at the opening of the cylinder is screwed down to compress the O-shaped rings to be attached to the surface of an airspeed tube for region sealing, and although the second type can seal small holes in a conical surface, the positioning is difficult, and the accurate position on the conical surface sealing is difficult to control after the compression amount of the O-shaped rings is superposed, so the effect is not good.

The third is that the second structure is made into an integral rubber type, and a strip of sealing ring is arranged at the corresponding part of the inner cavity for sealing, so that on one hand, accurate positioning can not be carried out during sealing, and on the other hand, the rubber has different shrinkage rates in cold and hot seasons, so that the rubber can not be used universally in cold and hot seasons.

As shown in fig. 1, a present airspeed tube 1, airspeed tube 1's periphery wall has the circular conical surface 11 of 3.2 degrees, and be equipped with a week interval along axial direction in proper order on the circular conical surface 11 and set up rain leakage hole 12, the first static pressure hole 13 that a week interval set up and the second static pressure hole 14 that a week interval set up, and airspeed tube 1 is equipped with dynamic pressure hole 15 in the one end (being most advanced) that conical surface 11 diminishes gradually, for the convenience of airspeed tube conical surface laminating, for last three kinds of sealed anchor clamps are difficult to seal airspeed tube 1 and are tested in order to accomplish the static and dynamic pressure, all can not reach user demand promptly.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to overcome the not enough of prior art, provide a simple structure, convenient operation and sealed effectual sealed anchor clamps for airspeed tube.

In order to solve the technical problem, the utility model discloses a following technical scheme:

the utility model provides an airspeed tube is with sealed anchor clamps, includes the barrel, is used for docking on the airspeed tube the static pressure hole air in first static pressure hole and chew and be used for docking dynamic pressure hole's dynamic pressure hole air on the airspeed tube and chew, be equipped with on the inner wall of barrel and separate the ring, separate and keep off the ring and fall into first die cavity and second die cavity with the inner space of barrel, the static pressure hole air is chewed and is installed on the lateral wall of barrel, dynamic pressure hole air is chewed the one end at the barrel, be equipped with in the first die cavity and be used for sealing the first sealing washer in rain leakage hole on the airspeed tube, be equipped with in the second die cavity and be used for sealing the second sealing washer in second.

As a further improvement of the above technical solution:

the dynamic pressure hole air nozzle is arranged at one end of the cylinder body in the first cavity, a first lining is arranged between the blocking ring and the first sealing ring in the first cavity, and a second lining is arranged between the dynamic pressure hole air nozzle and the first sealing ring.

The cylinder body is provided with a first blanking cover at one end provided with the dynamic pressure hole air nozzle, the inner end of the dynamic pressure hole air nozzle is movably sleeved in the cylinder body, and the first blanking cover is arranged at the outer end of the dynamic pressure hole air nozzle in a pressing mode.

The first blocking cover is in threaded connection with the cylinder body.

The two sides of the first sealing ring are respectively provided with a first conical surface, the joint surface of the first bushing and the first sealing ring and the contact surface of the second bushing and the first sealing ring are respectively provided with a second conical surface, and the first conical surfaces are matched with the second conical surfaces; and/or, the inner wall of one end of the cylinder body, which is provided with the dynamic pressure hole air nozzle, is provided with a ring groove, and a check ring is clamped in the ring groove.

The barrel has been installed the second blanking cover in the one end of second die cavity, be equipped with the third bush in the second die cavity between separating fender ring and second sealing washer, be equipped with the fourth bush between second blanking cover and second sealing washer.

The second plug cover is in threaded connection with the cylinder body.

And third conical surfaces are arranged on two sides of the second sealing ring, fourth conical surfaces are arranged on the joint surface of the third bushing and the second sealing ring and the contact surface of the fourth bushing and the second sealing ring, and the third conical surfaces are matched with the fourth conical surfaces.

The side wall of the cylinder body is provided with a mounting hole, one end of the mounting hole is communicated with the center of the baffle ring, the other end of the mounting hole is communicated with the outside of the cylinder body, and the static pressure hole air nozzle is arranged in the mounting hole.

The distance D1 between the mounting hole and one end of the dynamic pressure hole air nozzle arranged on the cylinder body is equal to the distance D2 between the first static pressure hole and the tip of the pitot tube.

Compared with the prior art, the utility model has the advantages of:

the utility model discloses airspeed tube is with sealed anchor clamps includes the barrel, is used for docking on the airspeed tube hydrostatic pressure hole air of first hydrostatic pressure hole and chew and be used for docking the dynamic pressure hole air of dynamic pressure hole on the airspeed tube and chew, is equipped with on the inner wall of barrel and separates the fender ring, separates the fender ring and falls into first die cavity and second die cavity with the inner space of barrel, and the hydrostatic pressure hole air is chewed and is installed on the lateral wall of barrel, and dynamic pressure hole air is chewed and is installed the one end at the barrel, is equipped with the first sealing washer that is used for sealed airspeed tube to leak the rain hole in the first die cavity, and second die cavity is equipped with and is used for sealing. During the use, the tip of airspeed tube is installed the other end that dynamic pressure hole air was chewed by the barrel and is stretched into in the barrel, and pass the second sealing washer in proper order, keep off ring and first sealing washer, and make, any first static pressure hole butt joint on static pressure hole air was chewed and the airspeed tube, dynamic pressure hole air is chewed and is connected with dynamic pressure hole on the airspeed tube, the internal perisporium of first sealing washer is sealed to be pressed all hourglass rain holes on the airspeed tube, the sealed inner wall that presses in first die cavity of the peripheral wall of first sealing washer, the sealed all second static pressure holes that press on the airspeed tube of the internal perisporium of second sealing washer, the sealed inner wall that presses in the second die cavity of peripheral wall of second sealing washer, realize the tight seal of clamp to the airspeed tube from this, the steam generator is.

Drawings

Fig. 1 is a schematic diagram of the construction of a pitot tube.

Figure 2 is the utility model discloses the seal anchor clamps for airspeed head is with the schematic structure diagram of half section.

FIG. 3 is the utility model discloses sealing clamp's for airspeed tube spatial structure sketch map

FIG. 4 is the structure schematic diagram of the sealing clamp for airspeed head in the use state

The reference numerals in the figures denote:

1. a pitot tube; 11. a conical surface; 12. a rain leakage hole; 13. a first static pressure hole; 14. a second static pressure hole; 15. dynamic pressure holes; 2. a barrel; 21. a baffle ring; 22. a first cavity; 221. a first bushing; 222. a second bushing; 223. a second tapered surface; 23. a second cavity; 231. a third bushing; 232. a fourth bushing; 233. a fourth conical surface; 24. mounting holes; 25. a ring groove; 3. a static pressure port air nozzle; 4. a dynamic pressure hole air nozzle; 5. a first seal ring; 51. a first conical surface; 6. a second seal ring; 61. a third conical surface; 7. a first blanking cover; 8. a second blanking cover; 9. and a retainer ring.

Detailed Description

The invention will be described in further detail with reference to the drawings and specific examples.

As shown in fig. 2 to 4, the sealing clamp for pitot tube of this embodiment, including barrel 2, be used for butt joint the static pressure hole air nozzle 3 of first static pressure hole 13 on pitot tube 1 and be used for butt joint the dynamic pressure hole air nozzle 4 of dynamic pressure hole 15 on pitot tube 1, be equipped with on the inner wall of barrel 2 and keep off ring 21, keep off ring 21 and divide into first die cavity 22 and second die cavity 23 with the inner space of barrel 2, static pressure hole air nozzle 3 is installed on the lateral wall of barrel 2, dynamic pressure hole air nozzle 4 is installed in the one end of barrel 2, first die cavity 22 endotheca is equipped with the first sealing washer 5 that is used for sealing up rain hole 12 on pitot tube 1, second die cavity 23 endotheca is equipped with the second sealing washer 6 that is used for sealing up second static pressure hole 14 on pitot tube 1. During the use, airspeed tube 1's pointed end is installed the other end that dynamic pressure hole air chewed 4 by barrel 2 and is stretched into in the barrel 2, and pass second sealing washer 6 in proper order, separate fender ring 21 and first sealing washer 5, and make, any first static pressure hole 13 butt joint on static pressure hole air chewed 3 and airspeed tube 1, dynamic pressure hole 15 butt joint on dynamic pressure hole 4 and the airspeed tube 1, all rain leakage holes 12 on airspeed tube 1 are pressed in to the internal perisporium seal of first sealing washer 5, the sealed inner wall that presses in first die cavity 22 of the periphery wall of first sealing washer 5, all second static pressure holes 14 on airspeed tube 1 are pressed in the internal wall of second die cavity 23 in the internal wall seal of second sealing washer 6, realize the tight seal of clamp to airspeed tube 1 from this, moreover, the steam generator is simple in structure, convenient operation and sealed effectual.

In this embodiment, the dynamic pressure hole nozzle 4 is installed at one end of the cylinder 2 in the first cavity 22, a first bushing 221 is disposed between the baffle ring 21 and the first seal ring 5 in the first cavity 22, and a second bushing 222 is disposed between the dynamic pressure hole nozzle 4 and the first seal ring 5. The interaction of the first bushing 221 and the second bushing 222 can play a role in compressing, deforming and limiting the first sealing ring 5, so that the sealing operation of the pitot tube 1 is further facilitated.

In this embodiment, the first cap 7 is installed at one end of the cylinder 2 where the dynamic pressure hole nozzle 4 is installed, the inner end of the dynamic pressure hole nozzle 4 is movably sleeved in the cylinder 2, and the first cap 7 is pressed at the outer end of the dynamic pressure hole nozzle 4. Specifically, first bush 221, second bush 222 and first sealing washer 5 all can be along the gliding installation in first die cavity 22 of the axial of barrel 2, when first sealing washer 5 aimed at pitot tube 1 and leak the position of rain hole 12, install first blanking cover 7, first blanking cover 7 promotes dynamic pressure hole air nozzle 4, dynamic pressure hole air nozzle 4 promotes second bush 222 again, and finally, under second bush 222 and the interaction of first bush 221, inwards extrude first sealing washer 5 by the both sides of first sealing washer 5 for first sealing washer 5 tightly presses in pitot tube 1 on the conical surface 11 of leaking rain hole 12 department to it is more convenient to leak the sealed operation of rain hole 12 on the pitot tube 1.

In this embodiment, the barrel 2 is equipped with the external screw thread with the link of first blanking cover 7, and first blanking cover 7 is equipped with the internal thread for first blanking cover 7 makes things convenient for the installation and the regulation of first blanking cover 7 with 2 threaded connection of barrel.

In this embodiment, the two sides of the first sealing ring 5 are both provided with the first conical surface 51, the joint surface of the first bushing 221 and the first sealing ring 5 and the contact surface of the second bushing 222 and the first sealing ring 5 are both provided with the second conical surface 223, the first conical surface 51 is matched with the second conical surface 223, which is beneficial to the extrusion deformation of the first sealing ring 5, preferably, the first conical surfaces 51 on the two sides of the first sealing ring 5 are symmetrically arranged, so that the width of the inner peripheral wall of the first sealing ring 5 is wider than that of the outer peripheral wall, and the alignment of the rain leaking hole 12 on the first sealing ring 5 and the pitot tube 1 is facilitated.

In this embodiment, the inner wall of the cylinder 2 at the end where the dynamic pressure hole nozzle 4 is installed is provided with a ring groove 25, and the retaining ring 9 is clamped in the ring groove 25 to prevent the second bushing 222 from sliding out.

In this embodiment, the cylinder 2 is provided with a second cap 8 at one end of the second cavity 23, a third bushing 231 is disposed between the baffle ring 21 and the second seal ring 6 in the second cavity 23, and a fourth bushing 232 is disposed between the second cap 8 and the second seal ring 6. Specifically, the third bush 231, the fourth bush 232 and the second seal ring 6 can be installed in the second cavity 23 in a sliding manner along the axial direction of the cylinder 2, when the second seal ring 6 is aligned with the position of the second static pressure hole 14 on the pitot tube 1, the second blanking cover 8 is installed, the second blanking cover 8 pushes the fourth bush 232, and finally, under the interaction of the fourth bush 232 and the third bush 231, the second seal ring 6 is pressed inwards by two sides of the second seal ring 6, so that the second seal ring 6 is tightly pressed on the conical surface 11 of the pitot tube 1 at the second static pressure hole 14, and the sealing operation of the second static pressure hole 14 on the pitot tube 1 is more convenient.

In this embodiment, the barrel 2 is equipped with the external screw thread with the link of second blanking cover 8, is equipped with the internal thread on the second blanking cover 8 for

second blanking cover

8 and 2 threaded connection of barrel make things convenient for the installation and the regulation of second blanking cover 8.

In this embodiment, both sides of the second sealing ring 6 are provided with the third conical surface 61, the joint surface between the third bushing 231 and the second sealing ring 6 and the contact surface between the fourth bushing 232 and the second sealing ring 6 are provided with the fourth conical surface 233, and the third conical surface 61 is matched with the fourth conical surface 233, so as to facilitate the extrusion deformation of the second sealing ring 6, preferably, the third conical surfaces 61 on both sides of the second sealing ring 6 are symmetrically arranged, so that the width of the inner peripheral wall of the second sealing ring 6 is wider than that of the outer peripheral wall, and the alignment of the second sealing ring 6 with the second static pressure hole 14 on the pitot tube 1 is facilitated.

In this embodiment, the side wall of the cylinder 2 is provided with a mounting hole 24, the mounting hole 24 is communicated with the center of the baffle ring 21, the static pressure hole air nozzle 3 is installed in the mounting hole 24, specifically, one end of the mounting hole 24 is communicated with the center of the baffle ring 21, the other end is communicated with the outside of the cylinder 2, the mounting hole 24 is a threaded hole, and the static pressure hole air nozzle 3 is in threaded connection with the mounting hole 24, so that the installation is convenient.

In this embodiment, the distance D1 between the mounting hole 24 and the end of the cylinder 2 where the dynamic pressure hole air nozzle 4 is mounted is equal to the distance D2 between the first static pressure hole 13 and the tip of the pitot tube 1, that is, when the end face of the cylinder 2 where the dynamic pressure hole air nozzle 4 is mounted coincides with the tip end face of the pitot tube 1, each first static pressure hole 13 on the pitot tube 1 corresponds to the position of the mounting hole 24, each second static pressure hole 14 is located in the middle of the second sealing ring 6, and the rain leakage hole 12 is located in the middle of the first sealing ring 5, wherein the first sealing ring 5 and the second sealing ring 6 are preferably rubber rings.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention. The technical solution of the present invention can be used by anyone skilled in the art to make many possible variations and modifications, or to modify equivalent embodiments, without departing from the scope of the technical solution of the present invention, using the technical content disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments by the technical entity of the present invention should fall within the protection scope of the technical solution of the present invention.

Claims

1. The utility model provides a sealing clamp for airspeed tube which characterized in that: including barrel (2), be used for docking on airspeed head (1) the static pressure hole air of first static pressure hole (13) chew (3) and be used for docking dynamic pressure hole air of dynamic pressure hole (15) and chew (4), be equipped with on the inner wall of barrel (2) and keep off ring (21), keep off ring (21) and fall into first die cavity (22) and second die cavity (23) with the inner space of barrel (2), the static pressure hole air is chewed (3) and is installed on the lateral wall of barrel (2), the dynamic pressure hole air is chewed (4) and is installed the one end at barrel (2), be equipped with in first die cavity (22) and be used for sealing first sealing washer (5) of hourglass rain hole (12) on airspeed head (1), be equipped with in second die cavity (23) and be used for sealing second sealing washer (6) of second static pressure hole (14) on airspeed head (1).

2. The sealing clamp for the pitot tube of claim 1, wherein: the dynamic pressure hole air nozzle (4) is arranged at one end of the cylinder body (2) in the first cavity (22), a first lining (221) is arranged between the baffle ring (21) and the first sealing ring (5) in the first cavity (22), and a second lining (222) is arranged between the dynamic pressure hole air nozzle (4) and the first sealing ring (5).

3. The sealing clamp for pitot tube of claim 2, characterized in that: the cylinder body (2) is provided with a first blocking cover (7) at one end provided with the dynamic pressure hole air nozzle (4), the inner end of the dynamic pressure hole air nozzle (4) is movably sleeved in the cylinder body (2), and the first blocking cover (7) is pressed at the outer end of the dynamic pressure hole air nozzle (4).

4. The sealing clamp for the pitot tube of claim 3, wherein: the first blocking cover (7) is in threaded connection with the cylinder body (2).

5. The sealing clamp for the pitot tube of claim 4, wherein: two sides of the first sealing ring (5) are respectively provided with a first conical surface (51), the joint surface of the first bushing (221) and the first sealing ring (5) and the contact surface of the second bushing (222) and the first sealing ring (5) are respectively provided with a second conical surface (223), and the first conical surface (51) is matched with the second conical surfaces (223); and/or, the inner wall of one end of the cylinder body (2) provided with the dynamic pressure hole air nozzle (4) is provided with a ring groove (25), and a check ring (9) is clamped in the ring groove (25).

6. The sealing clamp for the pitot tube of any one of claims 1 to 5, wherein: the barrel (2) is provided with a second blanking cover (8) at one end of a second cavity (23), a third lining (231) is arranged between the baffle ring (21) and the second sealing ring (6) in the second cavity (23), and a fourth lining (232) is arranged between the second blanking cover (8) and the second sealing ring (6).

7. The sealing clamp for the pitot tube of claim 6, wherein: the second plug cover (8) is in threaded connection with the cylinder body (2).

8. The sealing clamp for the pitot tube of claim 7, wherein: and both sides of the second sealing ring (6) are provided with third conical surfaces (61), the joint surface of the third bushing (231) and the second sealing ring (6) and the contact surface of the fourth bushing (232) and the second sealing ring (6) are provided with fourth conical surfaces (233), and the third conical surfaces (61) are matched with the fourth conical surfaces (233).

9. The sealing clamp for the pitot tube of claim 7 or 8, wherein: the side wall of the barrel body (2) is provided with a mounting hole (24), one end of the mounting hole (24) is communicated with the center of the baffle ring (21), the other end of the mounting hole is communicated with the outside of the barrel body (2), and the static pressure hole air nozzle (3) is arranged in the mounting hole (24).

10. The sealing clamp for the pitot tube of claim 9, wherein: the distance D1 between the mounting hole (24) and one end of the cylinder (2) provided with the dynamic pressure hole air nozzle (4) is equal to the distance D2 between the first static pressure hole (13) and the tip of the airspeed head (1).