CN112923810B - Axial movement sealing device for gas detonation driven ultra-high-speed launching device - Google Patents

Abstract

The invention discloses an axial movement sealing device used for a gas detonation-driven ultra-high-speed launch device. The launch tube is supported by a launch tube walking structure and a self-aligning bracket. The launch tube walking structure includes a track, a support trolley and a traveling oil cylinder. It is erected horizontally in a straight line, the supporting trolley is clamped on the track, the supporting trolley is connected with the traveling cylinder, and the supporting trolley is driven to walk along the track by the traveling cylinder; The self-aligning bracket is connected with the test chamber, and the concentricity between the launch tube and the test chamber is controlled by the supporting trolley and the self-aligning bracket. Through the working principle of the invention, the sealing effect in the axial direction under dynamic conditions is achieved, and the oblique angle of the brass sealing ring ensures that the O-ring has sufficient deformation and extrusion space in the axial direction, so as to ensure the sealing effect. At the same time, the life of the O-ring is greatly improved.

Description

Axial Motion Seals for Gas Detonation Driven Ultra-Velocity Launchers

technical field

The invention belongs to the technical field of ultra-high-speed projectile/model testing experimental equipment, and in particular relates to an axial motion sealing device used for a gas detonation-driven ultra-high-speed launching device.

Background technique

A ballistic target is a launching system that launches a test model or projectile to a certain speed and can measure its aerodynamic characteristics and collision characteristics. According to different firing methods, it is divided into single-stage guns and multi-stage guns, among which multi-stage guns are mainly secondary guns. Ballistic targets were initially used to test the flight and lethality of bullets or artillery shells. In recent years, the continuous development of experimental research on the aerodynamic characteristics of various hypersonic vehicles, the resistance of materials to particle cloud erosion, and high-speed/ultra-high-speed collisions has greatly promoted the development of ballistic target equipment and its testing technology.

The launch tube and the test cabin are important components of the ballistic target equipment. The ballistic performance of the launch tube and the vacuum degree of the test cabin are directly related to the projectile launch speed and the simulated test environment. Ballistic target equipment requires high-pressure air, propellant or gas-phase detonation to provide driving capability. During the operation of the test equipment, due to the large impact load, the detonation tube, pump tube and launch tube will move forward and backward to a certain extent in the axial direction. In order to achieve stable measurement of the model in the test chamber, the launch tube and the test chamber cannot be hard-connected. Therefore, an axial seal is required to achieve a high vacuum environment in the test chamber.

The existing axial seals often use a labyrinth structure or a combination of O-rings and fasteners. This structure can achieve a better axial sealing effect and is mostly used for pressure pipeline connections, turbomachinery rotating shafts, etc. However, it is difficult to achieve the sealing effect under the condition of forward and backward movement in the axial direction. Therefore, how to focus on the connection and sealing between the launch tube and the test chamber in the gas detonation-driven high-speed launch device, to design a new type of axial sealing structure and travel control mechanism, to achieve the sealing effect under dynamic conditions, has important realistic meaning.

SUMMARY OF THE INVENTION

In view of the problems existing in the prior art, the purpose of the present invention is to provide an axial motion sealing device for a gas detonation-driven ultra-high-speed launch device, which is mainly used for the connection, axial movement and dynamic characteristics between the launch tube and the test chamber. seal.

The technical scheme adopted in the present invention is:

Axial motion sealing device for gas detonation-driven ultra-high-speed launch device, including launch tube, launch tube walking structure, self-aligning bracket and test chamber, the launch tube is supported by the launch tube walking structure and self-aligning bracket,

The launching tube walking structure includes a track, a supporting trolley and a traveling oil cylinder, the track is erected horizontally along a straight line, the supporting trolley is clamped on the track, the supporting trolley is connected with the traveling oil cylinder, and the traveling oil cylinder drives the supporting trolley to walk along the track;

The self-aligning bracket is fixedly installed on the track, and the launch tube is horizontally placed horizontally through the support trolley, the self-aligning bracket is connected to the test chamber, and the concentricity of the launch tube and the test chamber is controlled by the support trolley and the self-aligning bracket.

The support trolley and the self-aligning bracket are installed on the track to support the launch tube. The launch tube is connected to the test chamber, and the concentricity of the launch tube and the test chamber is fully guaranteed during installation.

Further, the supporting trolley includes a tube body bracket, a top cover on the tube body, a wheel, a wheel side cover, and a trailer bottom frame, and the tube body bracket and the trailer bottom frame are respectively arranged on the upper part and the lower part of the supporting trolley, The top of the tube body bracket is provided with a tube body upper cover, the launch tube is installed through the tube body bracket, and the tube body bracket and the tube body upper cover are fixed by fastening bolts; the bottom of the trailer chassis is installed with wheels through bearings The outer side of the wheel is provided with a wheel side cover, and the outer edge protrusions of the wheels on both sides clamp the rail in the middle, and control the wheel to move along the sliding rail.

Furthermore, the support trolley is also provided with an up and down adjustment mechanism, and the up and down adjustment mechanism is set as an up and down adjustment bolt. It is screwed between the tube body bracket and the trailer bottom frame, and the relative height between the tube body bracket and the trailer bottom frame is controlled by twisting the up and down adjustment bolts, and then the height position of the supporting trolley is adjusted.

Further, the support trolley is also provided with a left and right adjustment mechanism, and the left and right adjustment mechanisms include left and right adjustment bolts that are symmetrical to each other, and a left adjustment seat and a right adjustment seat that are fixed on the trailer chassis. The bolt penetrates the left adjustment seat and abuts on the side wall of the pipe bracket, the right adjustment bolt penetrates the right adjustment seat and abuts on the side wall of the pipe bracket, and the left adjustment bolt and the right adjustment bolt cooperate to adjust the pipe body The left and right position of the bracket, and then adjust the left and right position of the support trolley.

Further, the upper end of the self-aligning support is provided with an annular frame that communicates with the launch tube, the lower end of the self-aligning support is set as a U-shaped support, and the bottom end surface of the U-shaped support is set to be flat and in direct contact with the track.

Furthermore, the upper, lower, left, and right sides of the annular frame and the launch tube are respectively provided with an identical adjustment mechanism. The adjustment mechanism includes a hand wheel, a self-aligning screw, a screw sleeve, a roller shaft and a roller. On the ring frame, the self-aligning screw is embedded in the screw sleeve, the inner end of the self-aligning screw is installed with a roller through the roller shaft, the roller and the outer side wall of the launch tube are in contact with each other, and the outer end of the self-aligning screw is connected with the handwheel. The position of the rollers in the four directions of up, down, left and right of the launch tube is controlled by handwheel adjustment.

The self-aligning bracket is in sliding contact with the track, and the position of the launch tube can be adjusted up, down, left, and right by controlling the screw by the handwheel. The roller can ensure that the axial movement of the tube body is not restricted.

Further, a diameter conversion mechanism is provided between the launch tube and the test chamber, and the diameter conversion mechanism includes a test chamber flange, a transition flange, and a compression flange. The test chamber flange, the transition flange, and the compression method The inner diameter of the flange becomes smaller in turn, the test chamber flange is connected to the test chamber, the compression flange and the transition flange are respectively connected to the launch tube, the test chamber flange and the transition flange are fixed by bolts, and the two are embedded. A sealing ring is provided; the transition flange and the compression flange are fixed by bolts, and a sealing component is installed at the gap between the transition flange and the compression flange.

Further, the sealing components are sequentially arranged as a sealing pressure sleeve, an O-ring a, a brass sealing ring a, a brass sealing ring b, and an O-ring b, and the sealing pressure sleeve is made of brass material and is set as a straight mouth. structure; the O-ring a and the O-ring b are both set to a fluororubber O-ring structure; the outer sides of the brass sealing ring a and the brass sealing ring b are provided with an oblique angle, when the launch tube moves in the axial direction, it passes through the Extruded seals seal under dynamic conditions.

The position closest to the transition flange is the fluororubber O-ring (DN140), followed by two brass sealing rings, fluororubber O-ring, and sealing sleeve; during the test, when the launch tube moves in the axial direction, it passes through The extruded seal realizes sealing under dynamic conditions; in addition, the outer side of the brass seal ring is set with an oblique angle, and the larger oblique angle ensures sufficient deformation space for the O-ring, which is convenient to achieve a better sealing effect.

The beneficial effects of the present invention are:

In the present invention, the launch tube is supported by the launch tube walking structure and the self-aligning bracket, the test chamber flange is connected with the test chamber, the transition flange is connected with the launch tube, and a sealing assembly is installed at the gap between the compression flange and the transition flange , During the test, when the launch tube moves in the axial direction, the sealing under dynamic conditions is achieved by extruding the seal. The launch tube walking mechanism has the functions of supporting the launch tube and ensuring the forward and backward walking of the launch tube. The walking mechanism can change the support position and support height by adjusting the left and right positioning screws to ensure the concentricity of the connection between the launch tube and the test chamber. The self-aligning bracket can adjust the center position of the launch tube by adjusting the self-aligning screw of the roller to keep it concentric with the launch tube and the tank body.

The invention realizes the dynamic sealing function under the condition of axial movement through the support trolley which has both support and axial movement, the self-aligning bracket which has the self-aligning function and does not move with the position of the pipe body, and the novel axial sealing assembly, which overcomes the In the past, the hard connection and labyrinth sealing mechanism could not bear the axial force and the sealing ring was easy to wear and so on. Through the novel design of the sealing component, the sealing effect in the axial direction under dynamic conditions was achieved. The oblique angle of the nylon ring ensures the O-type The ring has enough deformation and extrusion space in the axial direction, so that the life of the O-ring is greatly improved while ensuring the sealing effect.

Description of drawings

FIG. 1 is a schematic diagram of a partial overall structure of the present invention.

FIG. 2 is a front view of the supporting trolley in the present invention.

Fig. 3 is a side view of the support trolley in the present invention.

FIG. 4 is an enlarged schematic diagram of a part of K in FIG. 2 .

Fig. 5 is a front view of the self-aligning bracket in the present invention.

Fig. 6 is a side view of the self-aligning bracket in the present invention.

FIG. 7 is a schematic structural diagram of the sealing assembly in the present invention.

FIG. 8 is an enlarged schematic diagram of part A in FIG. 7 .

Among them, 1. track; 2. support trolley; 3. launch tube; 4. traveling cylinder; 5. self-aligning bracket; 6. sealing assembly; 7. test chamber; 8. fastening bolt; ; 10. Tube bracket; 11. Locking screw; 12. Up and down adjustment bolts; 13-1, Left adjustment seat; 13-2, Right adjustment seat; 14-1, Left adjustment bolt; 14-2, Right adjusting bolt; 15, trailer chassis; 16, wheel side cover; 17, U-shaped bracket; 18, roller; 19, screw sleeve; 20, self-aligning screw; 21, square cover; 22, countersunk head screw; 23, roller shaft; 24, hand wheel; 25, pin; 26, locking bolt; 27, ring frame; 28, roller frame; 29, sealing ring; 30, compression flange; 31, transition flange; 32, Test chamber flange; 33, sealing press sleeve; 34, O-ring a; 35, brass sealing ring a; 36, brass sealing ring b; 37, O-ring b.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

Example 1

The device of the present invention is driven by hydrogen-oxygen detonation and operates in a forward detonation drive mode. The projectile acquires high velocity in a uniform acceleration manner along the launch tube 3 under the action of brief platform pressure. When the projectile is further raised, the extrusion of the rear piston decreases until it stops. The waiter projectile continues to accelerate in the launch tube 3 in the manner of a first-stage gas cannon until it flies out of the muzzle. The projectile is launched into the test chamber 7, and the test results are collected through laser speed measurement, schlieren photography and other test technologies.

As shown in FIG. 1 , the axial motion sealing device used for the gas detonation-driven ultra-high-speed launch device includes a launch tube 3, a walking structure for the launch tube 3, an aligning support 5 and a test chamber 7, and the launch tube 3 passes through the launch tube 3 Walking structure and self-aligning bracket 5 support,

The walking structure of the launch tube 3 includes a track 1, a supporting trolley 2 and a traveling oil cylinder 4. The track 1 is erected horizontally along a straight line, the supporting trolley 2 is clamped on the track 1, and the supporting trolley 2 is connected with the traveling oil cylinder 4 through the traveling oil cylinder. 4. Drive the support trolley 2 to walk along the track 1;

The self-aligning bracket 5 is fixedly installed on the track 1, and the launch tube 3 is horizontally placed horizontally through the support trolley 2, and the self-aligning bracket 5 is connected to the test chamber 7. The support trolley 2 and the self-aligning bracket 5 control the launch tube 3 and test Concentricity of bin 7.

Both the support trolley 2 and the self-aligning bracket 5 are installed on the track 1 to support the launch tube 3 . The launch tube 3 is connected to the test chamber 7 , and the concentricity of the launch tube 3 and the test chamber 7 is fully ensured during installation.

In yet another embodiment of the present invention, the support trolley 2 is shown in Figures 2 , 3 and 4 , including a tube body bracket 10 , a tube body upper cover 9 , wheels, a wheel side cover 16 , and a trailer Bottom frame 15, up and down adjustment mechanism and left and right adjustment mechanism, the tube body bracket 10 is arranged on the upper part of the support trolley 2, the top end of the tube body bracket 10 is provided with a tube body upper cover 9, which is installed through the tube body bracket 10 The launch tube 3, the tube body bracket 10 and the upper cover 9 of the tube body are fixed by fastening bolts 8; the trailer chassis 15 is arranged at the lower part of the supporting trolley 2, and the bottom of the trailer chassis 15 is mounted with wheels through bearings, A wheel side cover plate 16 is arranged on the outside of the wheel, and the outer edge protrusions of the wheels on both sides clamp the rail in the middle, control the wheel to move along the slide rail, and play the dual functions of positioning and derailment prevention. During the test, when the tube body has axial movement, the support trolley 2 can move along with it to ensure the stable support of the tube body.

The up and down adjustment mechanism is set as the up and down adjustment bolts 12, the upper and lower adjustment bolts 12 are symmetrically arranged along the bottom of the tube body bracket 10, and each upper and lower adjustment bolt 12 is screwed on the tube body bracket 10 and the tube body bracket 10 from top to bottom. Between the trailer underframes 15 , the relative height between the pipe bracket 10 and the trailer underframe 15 is controlled by screwing the up and down adjustment bolts 12 , thereby adjusting the height position of the supporting trolley 2 .

The left-right adjustment mechanism includes a left-right adjustment mechanism including a left-right adjustment bolt 14-1 and a right adjustment bolt 14-2 that are left-right symmetrical, and a left-side adjustment seat 13-1 and a right-side adjustment seat 13 fixedly arranged on the trailer chassis 15. -2, the left adjustment bolt 14-1 penetrates through the left adjustment seat 13-1 and abuts on the side wall of the tube body bracket 10, and the right adjustment bolt 14-2 penetrates through the right adjustment seat 13-2 and abuts against the tube body bracket On the side wall of the frame 10, when the left adjustment bolt 14-1 is turned to the left, first loosen the right adjustment bolt 14-2, and the adjustment tube bracket 10 moves to the left as a whole; When adjusting the bolt 14-2, first loosen the left adjustment bolt 14-1, and adjust the tube body bracket 10 to move to the right as a whole; the left adjustment bolt 14-1 and the right adjustment bolt 14-2 cooperate with the adjustment tube body bracket 10 to adjust the left and right position of the support trolley 2.

A locking screw 11 is also provided. When the height and the left and right positions of the supporting trolley 2 are adjusted, the tube bracket 10 and the trailer chassis 15 are locked by the locking screw 11 to achieve the stability of the fixed position. effect.

On the basis of the above-mentioned embodiment, another embodiment different from the above-mentioned embodiment, the self-aligning bracket 5 is shown in FIG. 5 and FIG. 6 . The lower end of the self-aligning bracket 5 is set as a U-shaped bracket 17 , and the bottom end surface of the U-shaped bracket 17 is set as a plane and is in direct contact with the track 1 .

The ring frame 27 at the upper end of the self-aligning bracket 5 is provided with an identical adjusting mechanism on the upper, lower, left and right sides. Fixed on the ring frame 27, a square cover 21 is provided at the outer port of the screw sleeve 19, the square cover 21 and the screw sleeve 19 are fixed by a countersunk head screw 22, and the self-aligning screw 20 is embedded in the screw sleeve 19 Inside, the self-aligning screw 20 extends to the inner end of the ring frame 27 and is connected with the roller frame 28. The inner and outer side walls of the roller frame 28 are respectively connected with the self-aligning screw 20 and the screw sleeve 19 through threads. The base where the core screws 20 are sleeved with each other is set as a hollow cylindrical structure, the inner diameter of which is matched with the outer diameter of the self-aligning screw 20, and the outer diameter and the inner diameter of the screw sleeve 19 are mutually matched; the free end of the roller frame 28 The roller 18 is installed through the roller shaft 23, and the roller 18 abuts on the outer side wall of the launch tube 3. The outer end of the self-aligning screw 20 penetrates the square cover 21 through the pin 25 and is connected with the handwheel 24. Adjustment and control through the handwheel 24 The position of the roller 18 in the four directions of the launch tube 3 is moved, and the screw sleeve 19 is provided with a locking bolt 26. After the adjustment is completed, the position of the roller 18 fixed by the locking bolt 26 remains unchanged; during the test, the launch tube 3 When slightly moving forward and backward, the four rollers 18 can ensure that the position of the self-aligning bracket 5 remains unchanged when the pipe body moves, which can not only play a supporting role, but also take into account the needs of the pipe body moving.

On the basis of the above-mentioned embodiment, another embodiment different from the above-mentioned embodiment, the sealing assembly 6 between the launch tube 3 and the test chamber 7 is shown in FIG. 7 and FIG. 8 . A sealing assembly 6 is arranged between the test chambers 7, and the sealing assembly 6 includes a test chamber flange 32, a transition flange 31, and a pressing flange 30. The test chamber flange 32, the transition flange 31, and the pressing flange 30 The inner diameter of the test chamber decreases in turn, the test chamber flange 32 is connected to the test chamber 7, the compression flange 30 and the transition flange 31 are respectively connected to the launch tube 3, and the test chamber flange 32 and the transition flange 31 are fixed by bolts. And a sealing ring 29 is embedded between the two; the transition flange 31 and the pressing flange 30 are fixed by bolts, and a sealing pressing sleeve 33 and brass are installed at the gap between the transition flange 31 and the pressing flange 30. Sealing rings, O-rings.

On the basis of the above embodiment, another embodiment different from the above embodiment, the gap between the transition flange 31 and the pressing flange 30 is installed with a sealing pressure sleeve 33, an O-ring a34, a brass seal Ring a35, brass sealing ring b36, O-ring b37, the sealing pressure sleeve 33 is made of brass material and set as a straight structure; the O-ring a34 and O-ring b37 are both set as fluororubber O-ring structure ; The outer side of the brass sealing ring a35 is set with an oblique angle, and the outer side of the brass sealing ring b36 is set with an oblique angle. When the launch tube 3 moves in the axial direction, the sealing under dynamic conditions is realized by extruding the seal.

When the tube body moves upstream of the launch tube 3, the O-ring b37 located on the inside is squeezed and deformed, and the opening direction of the inclined opening of the brass sealing ring b36 in contact with it is the same as the moving direction of the tube body, ensuring sufficient deformation of the O-ring b37 In the same way, when the pipe body moves downstream, the O-ring a34 on the outside and the brass sealing ring a35 in contact with it work together, and the direction of the oblique opening of the brass sealing ring a35 is the same as the moving direction of the pipe body. , the dynamic sealing is also realized; the outermost sealing sleeve 33 is also made of brass, and the sealing sleeve 33 is designed with a straight mouth. Under the condition of ensuring the pressing effect, it also has a certain amount of deformation to ensure the sealing. Effect.

The above is not a limitation of the present invention, it should be pointed out: for those skilled in the art, under the premise of not departing from the essential scope of the present invention, several changes, modifications, additions or replacements can also be made. Improvements and modifications should also be considered within the scope of the present invention.

Claims (5)

1. An axial movement sealing device for a gas detonation drive ultra-high speed launching device is characterized by comprising a launching tube, a launching tube walking structure, an aligning bracket and a test bin, wherein the launching tube is supported by the launching tube walking structure and the aligning bracket,

the launching tube walking structure comprises a track, a supporting trolley and a walking oil cylinder, wherein the track is transversely erected along a straight line, the supporting trolley is clamped on the track and is connected with the walking oil cylinder, and the supporting trolley is driven to walk along the track through the walking oil cylinder;

the device comprises a test bin, a supporting trolley, an aligning support, a test trolley, a test bin and a transmitting tube, wherein the aligning support is fixedly installed on a track, the upper end part of the aligning support is provided with an annular frame concentric with the transmitting tube, the lower end part of the aligning support is provided with a U-shaped support, the bottom end surface of the U-shaped support is provided with a plane and is directly contacted with the track, the transmitting tube horizontally and transversely penetrates through the supporting trolley, the aligning support and the test bin in sequence, and the concentricity of the transmitting tube and the test bin is controlled through the supporting trolley and the aligning support;

a diameter conversion mechanism is arranged between the launching tube and the test bin, the diameter conversion mechanism comprises a test bin flange, a transition flange and a compression flange, the inner diameters of the test bin flange, the transition flange and the compression flange are sequentially reduced, the test bin flange is connected with the test bin, the compression flange and the transition flange are respectively connected with the launching tube, the test bin flange and the transition flange are fixed through bolts, and a sealing ring is embedded between the test bin flange and the transition flange; the transition flange and the pressing flange are fixed through bolts, and a sealing assembly is arranged at a gap between the transition flange and the pressing flange;

the sealing assembly is sequentially provided with a sealing pressing sleeve, an O-shaped ring a, a brass sealing ring b and an O-shaped ring b, and the sealing pressing sleeve is made of a brass material and is provided with a straight opening structure; the O-shaped ring a and the O-shaped ring b are both of a fluororubber O-shaped ring structure; the outer sides of the brass sealing rings a and b are provided with oblique angles, and when the launching tube moves in the axial direction, the launching tube is sealed under a dynamic condition by extruding the sealing assembly.

2. The axial movement sealing device for a gas detonation drive ultra-high speed launcher according to claim 1, wherein the support trolley comprises a pipe bracket, a pipe upper top cover, wheels, wheel side cover plates, and a trailer chassis, the pipe bracket and the trailer chassis are respectively arranged at the upper part and the lower part of the support trolley, the pipe upper top cover is arranged at the top end of the pipe bracket, the launch tube is installed through the pipe bracket, and the pipe bracket and the pipe upper top cover are fixed through fastening bolts; the bottom of trailer chassis passes through the bearing installation wheel, and the wheel outside is provided with the wheel side cap board, and the outer arch of following of both sides wheel is with the track card in the centre, and the control wheel removes along the track.

3. The axial-motion sealing device for a gas detonation-driven ultra-high-speed launching device as claimed in claim 2, wherein the supporting trolley is further provided with an up-down adjusting mechanism, the up-down adjusting mechanism is provided with up-down adjusting bolts, the up-down adjusting bolts are symmetrically arranged along the bottom of the pipe bracket, each up-down adjusting bolt is screwed between the pipe bracket and the trailer chassis from top to bottom, and the height position of the supporting trolley is adjusted by controlling the relative height between the pipe bracket and the trailer chassis through screwing the up-down adjusting bolts.

4. The axial-motion sealing device for a gas detonation-driven ultra-high-speed launching device as claimed in claim 2, wherein the supporting trolley is further provided with a left-right adjusting mechanism, the left-right adjusting mechanism comprises a left adjusting bolt and a right adjusting bolt which are bilaterally symmetrical, and a left adjusting seat and a right adjusting seat which are fixedly arranged on the trailer chassis, the left adjusting bolt penetrates through the left adjusting seat and abuts against the side wall of the pipe bracket, the right adjusting bolt penetrates through the right adjusting seat and abuts against the side wall of the pipe bracket, and the left-right position of the supporting trolley is adjusted by the cooperation of the left adjusting bolt and the right adjusting bolt.

5. The axial-motion sealing device for a gas detonation-driven ultra-high-speed launching device as defined in claim 1, wherein the annular frame is provided with an upper, a lower, a left, and a right side thereof, and the launching tube are provided with a same adjusting mechanism, the adjusting mechanism comprises a hand wheel, an aligning screw, a screw sleeve, a roller shaft and a roller, the screw sleeve is fixedly arranged on the annular frame, the aligning screw is embedded in the screw sleeve, the roller is mounted at the inner end of the aligning screw through the roller shaft, the roller is in contact with the outer side wall of the launching tube, the outer end of the aligning screw is connected with the hand wheel, and the position movement of the roller in four directions of the upper, the lower, the left, and the right sides of the launching tube is controlled by the adjustment of the hand wheel.

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