Efficient separator for satellite

Abstract

The efficient separator comprises a fixed base, a separation connecting piece, a signal collector, a trigger switch and a separation control piece are arranged on the fixed base, the separation connecting piece can be connected with and separated from a satellite fixing platform, and a separation compression spring is connected to the separation connecting piece; when the separation connecting piece is connected with the satellite fixing platform, the satellite fixing platform compresses the separation compression spring, the separation control piece can promote the separation connecting piece to release the connection with the satellite fixing platform, the separation connecting piece can promote the trigger switch to work, and the trigger switch can feed back signals to the signal collector. And the signal collector can feed back information to a ground control system. The device can realize quick response of satellite separation and improve the separation efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of spacecraft launch, and in particular to a high-efficiency separator for satellites. Background Art

[0002] In the case of space launch missions, the separation of satellites and carrier rockets is a key link to ensure the successful entry of satellites into orbit. Traditional separators often have problems such as large size, heavy weight, poor adaptability to extreme environments, and slow separation response speed. These problems not only increase the launch cost, but may also affect the success rate of satellite launches. Therefore, it is of great significance to develop a satellite separator that is small in size, light in weight, highly stable, can adapt to a wide temperature range environment, and can respond quickly. Summary of the invention

[0003] In view of the defects in the prior art, the present invention provides a high-efficiency separator for satellites. The device can achieve rapid response of satellite separation and improve separation efficiency.

[0004] A high-efficiency separator for satellites comprises a fixed base, on which are provided a separation connector, a signal collector, a trigger switch and a separation control component. The separation connector can be connected to and separated from a satellite fixed platform, and a separation compression spring is connected to the separation connector. When the separation connector is connected to the satellite fixed platform, the satellite fixed platform compresses the separation compression spring, and the separation control component can prompt the separation connector to disconnect from the satellite fixed platform. The separation connector can prompt the trigger switch to operate, and the trigger switch can feed back a signal to the signal collector, and the signal collector can feed back information to a ground control system.

[0005] Preferably, the separation connection member comprises a fixed block, a base plate, a mounting tube and a moving rod, wherein the fixed block is mounted on a fixed base, the moving rod is slidably connected to the fixed block, and a first groove is formed on the moving rod.

[0006] The separation compression spring is arranged on the base plate, the installation tube is fixed on the base plate, a movable column is arranged in the installation tube, a first spring is connected between the movable column and the top wall in the installation tube, an annular groove is opened on the movable column, a through hole is opened on the side wall of the installation tube, and a card bead is arranged in the installation tube.

[0007] When the bottom wall of the movable column contacts the top wall of the motion rod, the card bead contacts the side wall of the movable column, and the card bead partially protrudes out of the through hole and is connected to the satellite fixing platform. When the motion rod is moved backward and the bottom end of the movable column falls into the first groove body, the annular groove descends, and the card bead falls back into the annular groove to release the connection with the satellite fixing platform.

[0008] The front end of the motion rod is in contact with the trigger switch, and the motion rod can cause the trigger switch to work when it moves. A second spring is connected between the motion rod and the fixed base.

[0009] Preferably, a first roller is installed at the bottom end of the movable column.

[0010] Preferably, the separation control component includes a separation mechanical component and a separation electronic component, the separation mechanical component includes a fixed plate and a moving column, and the separation electronic component includes a telescopic mechanism and a controller.

[0011] The fixed plate is arranged on the fixed base, the moving column is slidably arranged on the fixed plate, a second slot is opened on the front wall of the moving column, the telescopic mechanism is arranged on the fixed plate, a third spring is connected between the right end of the moving column and the fixed base, and the controller can receive the control signal of the ground control system and control the telescopic mechanism to work.

[0012] When the moving shaft of the telescopic mechanism extends out and contacts the left end of the moving column, the rear end of the moving rod contacts the front wall of the moving column, the bottom wall of the movable column contacts the top wall of the moving rod, and the moving shaft of the telescopic mechanism contracts. By utilizing the elastic restoring force of the third spring, the moving column can move to the left, driving the second slot body to move to the left. By utilizing the elastic restoring force of the second spring, the rear end of the moving rod moves backward into the second slot body.

[0013] Preferably, a second roller is installed at the rear end of the motion rod.

[0014] Preferably, the trigger switch includes a switch body, which is electrically connected to the signal collector, a contact piece is hinged on the switch body, a return piece is connected between the contact piece and the switch body, and a pressure sensor is provided on the switch body. When the front end of the moving rod abuts against the contact piece and contacts the pressure sensor, the bottom wall of the movable column contacts the top wall of the moving rod.

[0015] Preferably, the number of the separation connectors is four, and the four separation connectors are divided into two separation connector groups, the two separation connector groups are distributed in the left-right direction, and each separation connector group includes two separation connectors distributed in the front-back direction.

[0016] In each disconnecting connecting member group, the motion rods of the two disconnecting connecting members are connected by the front and rear connecting rods.

[0017] The trigger switches are provided in two numbers, and the two trigger switches are respectively located at the front sides of the two separation connection member groups.

[0018] The separation control member is arranged at the rear side of the left separation connection member group. In the left separation connection member group, the rear end of the motion rod of the rear separation connection member contacts the front wall of the motion column of the separation control member.

[0019] A separation mechanical part is arranged at the rear side of the right separation connecting part group. In the right separation connecting part group, the rear end of the moving rod of the rear separation connecting part contacts the front wall of the moving column in the separation mechanical part.

[0020] The two motion columns are connected by left and right connecting rods.

[0021] Preferably, a first fixing block is provided on the fixing base, and two ends of the second spring are respectively connected to the first fixing block and the moving rod.

[0022] Preferably, a second fixing block is provided on the fixing base, and two ends of the third spring are respectively connected to the second fixing block and the moving column.

[0023] Preferably, a plurality of through holes are arranged on the installation tube, and the plurality of through holes are distributed along the circumference of the installation tube. A plurality of clamping beads are arranged in the installation tube, and the clamping beads correspond to the installation tubes one by one.

[0024] The beneficial effects of the present invention are as follows: the structural design is optimized in the technical solution, the volume and weight of the separator are reduced, the launch cost is reduced, and the stable operation and safe separation under complex environmental conditions are ensured by using a precise mechanical structure and high-strength materials. The materials are made of special materials to improve the adaptability of the separator to extreme temperature environments. Through the unique mechanical linkage and spring ejection mechanism, a rapid response to the separation signal is achieved, ensuring the efficient and smooth separation of the satellite. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the explosion structure of the present invention;

[0028] Figure 3 It is a schematic diagram of the overall structure of the left front side of the separation connection member and the separation control member in the present invention;

[0029] Figure 4 It is a schematic diagram of the partial explosion structure of the left rear side of the separation connection member and the separation control member in the present invention;

[0030] Figure 5 It is a schematic diagram of the overall structure of the trigger switch in the present invention.

[0031] In the accompanying drawings, 1-fixed base, 2-separation connecting member, 3-signal collector, 4-separation compression spring, 5-trigger switch, 6-separation control member, 7-front and rear connecting rods, 8-left and right connecting rods, 9-first fixed block, 10-second fixed block;

[0032] 201-fixed block, 202-base plate, 203-installation cylinder, 204-movable column, 205-annular groove, 206-first spring, 207-movement rod, 208-card bead, 209-through hole, 210-first slot body, 211-first roller, 212-second spring, 213-second roller;

[0033] 501-switch body, 502-contact sheet;

[0034] 601-fixed plate, 602-moving column, 603-telescopic mechanism, 604-second slot, 605-third spring. DETAILED DESCRIPTION

[0035] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0036] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0037] Example 1

[0038] like Figure 1-Figure 5 As shown, in this embodiment, a high-efficiency separator for satellite is provided, including a fixed base 1, on which a separation connector 2, a signal collector 3, a trigger switch 5 and a separation control component 6 are provided. The separation connector 2 can be connected to and separated from a satellite fixed platform. A separation compression spring 4 is connected to the separation connector 2. When the separation connector 2 is connected to the satellite fixed platform, the satellite fixed platform compresses the separation compression spring 4. The separation control component 6 can prompt the separation connector 2 to disconnect from the satellite fixed platform. The separation connector 2 can prompt the trigger switch 5 to work. The trigger switch 5 can feed back a signal to the signal collector 3, and the signal collector 3 can feed back information to the ground control system.

[0039] In this embodiment, a separation connector 2, a signal collector 3, a trigger switch 5 and a separation control component 6 are arranged on a fixed base 1. In the initial state, the separation connector 2 is connected to the satellite fixed platform. When the separation control component 6 receives a separation signal from the ground control system, the separation control component 6 prompts the separation connector 2 to disconnect from the satellite fixed platform, and the separation connector 2 prompts the trigger switch 5 to work. The trigger switch 5 feeds back a signal to the signal collector 3, and the signal collector 3 feeds back information to the ground control system, so that the staff can obtain the satellite separation information. In this way, through the cooperation of various components, the device can achieve a rapid response to satellite separation and improve separation efficiency.

[0040] In this embodiment, the separation connector 2 includes a fixed block 201, a base plate 202, a mounting tube 203 and a moving rod 207. The fixed block 201 is mounted on the fixed base 1. The moving rod 207 is slidably connected to the fixed block 201. The moving rod 207 is provided with a first groove 210.

[0041] The separation compression spring 4 is arranged on the base plate 202, the installation tube 203 is fixed on the base plate 202, a movable column 204 is arranged in the installation tube 203, a first spring 206 is connected between the movable column 204 and the inner top wall of the installation tube 203, an annular groove 205 is opened on the movable column 204, a through hole 209 is opened on the side wall of the installation tube 203, and a card bead 208 is arranged in the installation tube 203.

[0042] When the bottom wall of the movable column 204 contacts the top wall of the moving rod 207, the bead 208 contacts the side wall of the movable column 204, and the bead 208 partially protrudes out of the through hole 209 and is connected to the satellite fixing platform. When the moving rod 207 moves backward and the bottom end of the movable column 204 falls into the first groove body 210, the annular groove 205 descends, and the bead 208 falls back into the annular groove 205 to release the connection with the satellite fixing platform.

[0043] The front end of the moving rod 207 contacts the trigger switch 5 , and the moving rod 207 can cause the trigger switch 5 to work when it moves. A second spring 212 is connected between the moving rod 207 and the fixed base 1 .

[0044] In this embodiment, a first roller 211 is installed at the bottom end of the movable column 204 .

[0045] In this embodiment, the separation control component 6 includes a separation mechanical component and a separation electronic component. The separation mechanical component includes a fixed plate 601 and a moving column 602. The separation electronic component includes a telescopic mechanism 603 and a controller.

[0046] The fixed plate 601 is arranged on the fixed base 1, the moving column 602 is slidably arranged on the fixed plate 601, a second slot 604 is opened on the front wall of the moving column 602, the telescopic mechanism 603 is arranged on the fixed plate 601, a third spring 605 is connected between the right end of the moving column 602 and the fixed base 1, and the controller can receive the control signal of the ground control system and control the telescopic mechanism 603 to work.

[0047] In this embodiment, when the moving axis of the telescopic mechanism 603 extends out and contacts the left end of the moving column 602, the rear end of the moving rod 207 contacts the front wall of the moving column 602, and the bottom wall of the movable column 204 contacts the top wall of the moving rod 207. The moving axis of the telescopic mechanism 603 contracts. By utilizing the elastic restoring force of the third spring 605, the moving column 602 can move to the left, driving the second slot body 604 to move to the left. By utilizing the elastic restoring force of the second spring 212, the rear end of the moving rod 207 moves backward and enters the second slot body 604.

[0048] In this embodiment, a second roller 213 is installed at the rear end of the movement rod 207 .

[0049] The trigger switch 5 described in this embodiment includes a switch body 501, and the switch body 501 is electrically connected to the signal collector 3. A contact piece 502 is hinged on the switch body 501, and a return piece is connected between the contact piece 502 and the switch body 501. A pressure sensor is provided on the switch body 501. When the front end of the moving rod 207 abuts against the contact piece 502 and contacts the pressure sensor, the bottom wall of the movable column 204 contacts the top wall of the moving rod 207.

[0050] The specific working principle is as follows: the fixed base 1 is installed at a predetermined position of the launch vehicle, and the satellite is fixed on the satellite fixed platform to ensure a stable connection. A card slot that cooperates with the card bead 208 is provided on the satellite fixed platform.

[0051] In the initial state, the moving axis of the telescopic mechanism 603 extends out and contacts the left end of the moving column 602, the rear end of the moving rod 207 contacts the front wall of the moving column 602, the bottom wall of the movable column 204 contacts the top wall of the moving rod 207, and the front end of the moving rod 207 presses against the contact piece 502 and contacts the pressure sensor. At this time, the card bead 208 partially protrudes out of the through hole 209 and enters the card slot of the satellite fixing platform, thereby realizing the connection between the launch vehicle and the satellite.

[0052] When the launch vehicle reaches the predetermined separation height, the ground control system sends a separation signal to the controller, and the controller controls the movement axis of the telescopic mechanism 603 to retract. By utilizing the elastic restoring force of the third spring 605, the movement column 602 can move to the left, driving the second slot 604 to move to the left. At this time, the second slot 604 corresponds to the movement rod 207. By utilizing the elastic restoring force of the second spring 212, the rear end of the movement rod 207 moves backward into the second slot 604. When the second slot 604 corresponds to the active column 204, the active column 204 is moved backward by utilizing the elastic restoring force of the first spring 206. 4, the bottom end of the switch 208 drops into the first slot 210. At this time, the card bead 208 corresponds to the annular slot 205, and the card bead 208 falls back into the annular slot 205. The card bead 208 is separated from the card slot on the satellite fixed platform. The elastic restoring force of the separation compression spring 4 is used to separate the satellite fixed platform from the carrier rocket. At the same time, the motion rod 207 is separated from the contact piece 502, and the contact piece 502 returns to its original position and is separated from the contact with the pressure sensor. The switch body 501 sends a signal to the signal collector 3, and the signal collector 3 feeds back the separation information to the ground control system, and the staff learns the satellite separation information.

[0053] The structural design in this embodiment is optimized to reduce the volume and weight of the separator, reduce the launch cost, and ensure stable operation and safe separation under complex environmental conditions through precise mechanical structure and high-strength materials. The use of special materials improves the separator's adaptability to extreme temperature environments. Through the unique mechanical linkage and spring ejection mechanism, a rapid response to the separation signal is achieved, ensuring efficient and smooth separation of the satellite.

[0054] In this embodiment, the first roller 211 and the second roller 213 are provided to reduce the friction force during the movement of the moving column 602 and the moving rod 207 .

[0055] In this embodiment, the positions of the second spring 212 and the third spring 605 can be installed according to actual needs, as long as the requirements of the elastic restoring force are met.

[0056] In this embodiment, the telescopic mechanism 603 may be a gas cylinder, an oil cylinder, etc., and the return member may be a torsion spring, etc.

[0057] Example 2

[0058] This embodiment is further described on the basis of the embodiment 1. In this embodiment, the separation connection members 2 are set to four, and the four separation connection members 2 are divided into two separation connection member groups. The two separation connection member groups are distributed in the left and right directions, and each separation connection member group includes two separation connection members 2 distributed in the front and back directions.

[0059] In each separation connection member group, the movement rods 207 of the two separation connection members 2 are connected by the front and rear connection rods 7.

[0060] The trigger switches 5 are provided in two numbers, and the two trigger switches 5 are respectively located at the front sides of the two separation connection member groups.

[0061] The separation control member 6 is arranged at the rear side of the left separation connection member group. In the left separation connection member group, the rear end of the motion rod 207 of the rear separation connection member 2 contacts the front wall of the motion column 602 of the separation control member 6.

[0062] A separation mechanical part is arranged at the rear side of the right separation connection part group. In the right separation connection part group, the rear end of the motion rod 207 of the rear separation connection part 2 contacts the front wall of the motion column 602 in the separation mechanical part.

[0063] The two motion columns 602 are connected via left and right connecting rods 8 .

[0064] Specifically, the front ends of the moving rods 207 of the two separation connectors 2 on the front side respectively abut against the contact pieces 502 in the two trigger switches 5 to contact the pressure sensors.

[0065] In this embodiment, four separation connectors 2 are provided, and the four separation connectors 2 are linked by two front and rear connecting rods 7 and left and right connecting rods 8. The four separation connectors 2 are connected to the satellite fixing platform at the same time, thereby improving the stability of the connection between the satellite fixing platform and the separator. When the telescopic mechanism 603 is extended and retracted, the left and right connecting rods 8 move to the left, and the front and rear connecting rods 7 move backward. When separating, the telescopic mechanism 603 only needs to perform one action to realize that the beads 208 in the four separation connectors 2 fall back at the same time, which can not only realize the stability of the satellite fixing platform when connected, but also can quickly respond when separating, and realize efficient and smooth separation.

[0066] In this embodiment, a first fixing block 9 is disposed on the fixing base 1 , and two ends of the second spring 212 are connected to the first fixing block 9 and the moving rod 207 respectively.

[0067] In this embodiment, a second fixing block 10 is disposed on the fixing base 1 , and two ends of the third spring 605 are connected to the second fixing block 10 and the moving column 602 respectively.

[0068] In the present embodiment, a plurality of through holes 209 are arranged on the installation tube 203 , and the plurality of through holes 209 are distributed along the circumference of the installation tube 203 . A plurality of clamping beads 208 are arranged in the installation tube 203 , and the clamping beads 208 correspond to the installation tubes 203 one by one.

[0069] In this embodiment, a first fixing block 9 and a second fixing block 10 are provided to install the second spring 212 and the third spring 605. In this embodiment, the positions of the second spring 212 and the third spring 605 can be installed according to actual needs, as long as the elastic restoring force requirements are met. After the four separation connectors 2 are provided, other springs can also be provided to enable the overall operation to have a stronger elastic restoring force.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A high-efficiency separator for satellite, characterized in that: The invention comprises a fixed base (1), on which a separation connection piece (2), a signal collector (3), a trigger switch (5) and a separation control piece (6) are arranged. The separation connection piece (2) can be connected to and separated from a satellite fixed platform. A separation compression spring (4) is connected to the separation connection piece (2). When the separation connection piece (2) is connected to the satellite fixed platform, the satellite fixed platform compresses the separation compression spring (4). The separation control piece (6) can prompt the separation connection piece (2) to release the connection with the satellite fixed platform. The separation connection piece (2) can prompt the trigger switch (5) to work. The trigger switch (5) can feed back a signal to the signal collector (3), and the signal collector (3) can feed back information to a ground control system.

2. A satellite high-efficiency separator according to claim 1, characterized in that: The separation connection member (2) comprises a fixed block (201), a base plate (202), a mounting tube (203) and a moving rod (207); the fixed block (201) is mounted on a fixed base (1); the moving rod (207) is slidably connected to the fixed block (201); a first groove (210) is formed on the moving rod (207); The separation compression spring (4) is arranged on the base plate (202), the installation tube (203) is fixed on the base plate (202), a movable column (204) is arranged in the installation tube (203), a first spring (206) is connected between the movable column (204) and the inner top wall of the installation tube (203), an annular groove (205) is formed on the movable column (204), a through hole (209) is formed on the side wall of the installation tube (203), and a card bead (208) is provided in the installation tube (203). When the bottom wall of the movable column (204) contacts the top wall of the moving rod (207), the bead (208) contacts the side wall of the movable column (204), and the bead (208) partially protrudes out of the through hole (209) and is connected to the satellite fixing platform. When the moving rod (207) moves backward and the bottom end of the movable column (204) falls into the first groove body (210), the annular groove (205) descends, and the bead (208) falls back into the annular groove (205) to release the connection with the satellite fixing platform. The front end of the moving rod (207) contacts the trigger switch (5), and when the moving rod (207) moves, it can cause the trigger switch (5) to work. A second spring (212) is connected between the moving rod (207) and the fixed base (1).

3. A satellite high-efficiency separator according to claim 2, characterized in that: A first roller (211) is installed at the bottom end of the movable column (204).

4. A satellite high-efficiency separator according to claim 2, characterized in that: The separation control component (6) includes a separation mechanical component and a separation electronic component. The separation mechanical component includes a fixed plate (601) and a moving column (602). The separation electronic component includes a telescopic mechanism (603) and a controller. The fixed plate (601) is arranged on the fixed base (1), the moving column (602) is slidably arranged on the fixed plate (601), a second slot (604) is formed on the front wall of the moving column (602), the telescopic mechanism (603) is arranged on the fixed plate (601), a third spring (605) is connected between the right end of the moving column (602) and the fixed base (1), and the controller is capable of receiving a control signal from a ground control system and controlling the telescopic mechanism (603) to operate. When the moving shaft of the telescopic mechanism (603) extends out and contacts the left end of the moving column (602), the rear end of the moving rod (207) contacts the front wall of the moving column (602), the bottom wall of the movable column (204) contacts the top wall of the moving rod (207), and the moving shaft of the telescopic mechanism (603) contracts. By utilizing the elastic restoring force of the third spring (605), the moving column (602) can move to the left, driving the second slot body (604) to move to the left. By utilizing the elastic restoring force of the second spring (212), the rear end of the moving rod (207) moves backward and enters the second slot body (604).

5. A satellite high-efficiency separator according to claim 4, characterized in that: A second roller (213) is installed at the rear end of the movement rod (207).

6. A satellite high-efficiency separator according to claim 2, characterized in that: The trigger switch (5) comprises a switch body (501), the switch body (501) is electrically connected to the signal collector (3), a contact piece (502) is hinged on the switch body (501), a return piece is connected between the contact piece (502) and the switch body (501), and a pressure sensor is provided on the switch body (501), when the front end of the moving rod (207) abuts against the contact piece (502) and contacts the pressure sensor, the bottom wall of the movable column (204) contacts the top wall of the moving rod (207).

7. A satellite high-efficiency separator according to claim 4, characterized in that: The separation connection pieces (2) are arranged in four numbers, and the four separation connection pieces (2) are divided into two separation connection piece groups, the two separation connection piece groups are distributed in the left-right direction, and each separation connection piece group includes two separation connection pieces (2) distributed in the front-back direction. In each separation connection member group, the movement rods (207) of the two separation connection members (2) are connected by front and rear connection rods (7). The trigger switches (5) are provided in two numbers, and the two trigger switches (5) are respectively located at the front sides of the two separation connection member groups. The separation control member (6) is arranged at the rear side of the left separation connection member group. In the left separation connection member group, the rear end of the motion rod (207) of the rear separation connection member (2) contacts the front wall of the motion column (602) of the separation control member (6). A separation mechanical part is arranged at the rear side of the right separation connection part group. In the right separation connection part group, the rear end of the moving rod (207) of the rear separation connection part (2) contacts the front wall of the moving column (602) in the separation mechanical part. The two motion columns (602) are connected via left and right connecting rods (8).

8. A satellite high-efficiency separator according to claim 2, characterized in that: The fixed base (1) is provided with a first fixed block (9), and two ends of the second spring (212) are respectively connected to the first fixed block (9) and the moving rod (207).

9. A satellite high-efficiency separator according to claim 2, characterized in that: The fixed base (1) is provided with a second fixed block (10), and two ends of the third spring (605) are respectively connected to the second fixed block (10) and the moving column (602).

10. A satellite high-efficiency separator according to claim 2, characterized in that: The installation tube (203) is provided with a plurality of through holes (209), the plurality of through holes (209) being distributed along the circumference of the installation tube (203), and a plurality of clamping beads (208) are provided inside the installation tube (203), and the clamping beads (208) correspond one to one with the installation tube (203).

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