CN208320823U - Hypobaric chamber - Google Patents

Abstract

The utility model discloses a kind of hypobaric chambers, including testing box main body, the chamber door that the test box main body includes laboratory and is located on front side of laboratory, described chamber door one end is hinged on the left side of laboratory, the chamber door other end is connected to the right side of laboratory, the chamber door is equipped with gasket, the gasket is between laboratory and chamber door, the laboratory includes test cover and vacuum chamber, the test cover and the equal front openings of vacuum chamber, the test cover leading flank is equipped with sheet frame identical with test cover opening shape, the sheet frame opening is located at test cover opening in the projection of perpendicular in the projection of perpendicular, the vacuum chamber front end is fixed in sheet frame and vacuum chamber front end is stretched out outside sheet frame, there is gap in five faces of the vacuum chamber between test cover, this is practical new Type provides a kind of hypobaric chamber that good seal performance makes the accuracy rate of performance test high.

Description

Hypobaric chamber

Technical field

The utility model relates to test products technical field field more particularly to hypobaric chambers.

Background technique

Low-atmospheric pressure test system (or chamber) is widely used in the fields such as Aeronautics and Astronautics, information, electronics, is mainly used to Carry out instrument and meter, electric product, material, components or equipment low pressure, high temperature, low temperature individual event or simultaneously act under Environmental suitability and reliability test.For example, low-atmospheric pressure test system (or chamber) can with simulated high altitude height above sea level weather or The specific conditions such as aeroclimate, test specimen is placed in one, and can carry out corresponding performance test, low pressure to test specimen The sealing performance of environmental test chamber is critically important, this is related to the accuracy rate of performance test, according to the prior art, hypobaric test The accuracy rate of the poor sealing performance of case, performance test is low.

Utility model content

The technical problem to be solved by the utility model is to overcoming the defect of the above prior art, a kind of leakproofness is provided It can be well so that the high hypobaric chamber of the accuracy rate of performance test.

Technical solution adopted in the utility model is: a kind of hypobaric chamber, including test box main body, described Test box main body include laboratory and the chamber door that is located on front side of laboratory, described chamber door one end is hinged on a left side for laboratory Side, the chamber door other end are connected to the right side of laboratory, and the chamber door is equipped with gasket, and the gasket is located at Between laboratory and chamber door, the laboratory includes test cover and vacuum chamber, and the test cover and vacuum chamber front side are opened Mouthful, the test cover leading flank is equipped with sheet frame identical with test cover opening shape, and the sheet frame is open in perpendicular Projection be located at test cover opening in the projection of perpendicular, the vacuum chamber front end is fixed in sheet frame and before vacuum chamber End is stretched out outside sheet frame, and there are gap, the gap and test box main body in five faces of the vacuum chamber between test cover Outside connection, the gasket are located at the position that sheet frame is contacted with vacuum chamber, the gasket be located at sheet frame and chamber door it Between, the self-regulation device that automatic adjustment chamber door is pressed in the tightness on sheet frame is equipped between the sheet frame and chamber door.

After using the above structure, compared with the prior art, the utility model has the following advantages: test specimen is placed on examination The indoor corresponding performance test of carry out is tested, needs to keep vacuum state in laboratory, tests indoor sealing performance and directly affect Laboratory is divided into test cover and vacuum chamber, vacuumizes in vacuum chamber, set plate on front side of test cover by the accuracy rate of performance test Frame, allows vacuum chamber front end to be fixed in sheet frame, thus allows upper surface, the left and right side of vacuum chamber, bottom surface and trailing flank point Not with upper surface, the left and right side of test cover, there are gap in bottom surface (being also possible to bottom, lower hollow) and trailing flank, in plate Gasket is set between frame and chamber door, due to being vacuum in vacuum chamber, and is atmospheric pressure outside vacuum chamber, the indoor vacuum state of vacuum Gasket can be sucked on sheet frame, since there is gap in five faces of vacuum chamber between test cover, while on front side of vacuum chamber It stretches out sheet frame and forms protrusion, the contact area of such gasket and outside air increases the contact surface of gasket and vacuum chamber simultaneously Product also increases, and the vacuum state of vacuum chamber can more inhale gasket on sheet frame, in from empty shape between test cover and vacuum chamber State, that is, vacuum chamber are fixed on sheet frame, and vacuum chamber is not contacted with laboratory, and such atmospheric pressure can be tightly pressed against gasket On sheet frame, vacuum chamber can inhale gasket on sheet frame, good seal performance, so that the accuracy rate of performance test is high.

Preferably, the self-regulation device refers to that it further includes hinge and hinge bar, the hinge includes first Plate and the second plate being hinged with the first plate, first plate are located at sheet frame left side, and second plate is located at chamber door Left side, the side of nearly second plate of first plate are equipped with the first protrusion, the side difference of nearly first plate of second plate If described second convexes to form open slot of the opening towards the first plate, first protrusion there are two the second protrusion It is stretched outside in open slot, first protrusion is radially equipped with first through hole, and second protrusion is radially equal Equipped with the second through-hole, the both ends of the hinge bar are located in the second through-hole, and the middle section of the hinge bar is located at first In through-hole, the cross-sectional shape of second through-hole is waist through hole, and the hinge bar can move front and back in the second through-hole Dynamic, the hinge bar can drive the first protrusion to be moved forward and backward in open slot, and structure is simple, in a practical situation low pressure ring Border chamber can be pressed in the tightness on sheet frame according to the air pressure of vacuum chamber come automatic control stuff box door and ensure the close of vacuum chamber Feng Xing, when the air pressure of vacuum chamber becomes larger, chamber door is moved toward the direction far from vacuum chamber, and chamber door drives the second plate to move forward, When the air pressure of vacuum chamber becomes smaller, chamber door is moved toward the direction of vacuum chamber, and chamber door drives the second plate to move backward, due to second logical Hole is waist through hole, and hinge bar is always situated in the second through-hole, that is to say, that due to there is the presence of the second through-hole, the second plate can be former After move, automatic adjustment chamber door be pressed in the tightness on sheet frame, high reliablity, good seal performance.

Preferably, first plate is equipped at least two the first fixation holes for being used to fix the first plate, it is described First fixation hole is waist through hole, and the axis of first fixation hole along its length is perpendicular to horizontal plane, adjustable the The upper and lower position of one plate, convenient for different installation site requirements.

Preferably, second plate is equipped at least two the second fixation holes for being used to fix the second plate, it is described Second fixation hole is waist through hole, and the axis of second fixation hole along its length is parallel to horizontal plane, adjustable the The front-rear position of two plates, convenient for adjusting the spacing between the second plate and the first plate, to adjust the pine between chamber door and vacuum chamber Tight degree, easy to use, high reliablity.

Preferably, the self-regulation device refers to that it further includes the door lock for controlling door switch, the door lock packet Jam plate and lock are included, the jam plate is located at sheet frame right side, and the lock is located at chamber door right side, sets on the jam plate There is sliding slot, the axis of the sliding slot is parallel to horizontal plane, and closing piece is sliding combined in the sliding slot, is set in the sliding slot There is spring, the spring one end is fixed in sliding slot, and the spring other end is fixed on closing piece, is set on the lock There is handle, described handle one end is rotatably assorted on lock, and the handle other end may be stuck on closing piece, the closing piece The synchronizing moving when handle is moved forward and backward, structure is simple, and hypobaric chamber can be according to vacuum chamber in a practical situation Air pressure comes the tightness that automatic control stuff box door is pressed on sheet frame and the leakproofness for ensuring vacuum chamber, when the air pressure of vacuum chamber becomes larger When, the past direction far from vacuum chamber of chamber door moves, and chamber door drives lock to move forward, and it latches while handle being driven to move forward, Handle drives closing piece to be slidably fitted in sliding slot, and the spring for being at this moment connected to closing piece is compressed, when the air pressure of vacuum chamber becomes smaller, Chamber door is moved toward the direction of vacuum chamber, and chamber door drives lock to move backward, latches while handle being driven to move backward, the bullet of spring Power drives closing piece to be slidably fitted in sliding slot, and automatic adjustment chamber door is pressed in the tightness on sheet frame, high reliablity, sealing performance It is good.

Preferably, the closing piece upper surface is equipped with cylindrical protrusions, the handle other end is hook, described The bar portion of hook is located in cylindrical protrusions and the hook portion of hook is hooked in cylindrical protrusions side, convenient for opening and lockking chamber door, Structure is simple.

Preferably, being equipped with the rack for placing test box main body, the rack below the test box main body It is connected in bottom and test cover, the test cover upper end is hollow, and the test cover upper end inner sidewall is equipped with support plate, institute The support plate stated is equipped with the cover board for covering test cover upper end hollow space, between increasing between vacuum chamber and test cover Gap enables gasket preferably to seal up vacuum chamber, and effect is good, and the left side and rear side for testing cover can also cover upper end with test Structure is equally hollow while cover board is arranged, and hollow can be not provided with cover board under test cover.

Preferably, the support plate is respectively distributed on four angles of test cover, the support plate cross section Shape is triangle, and structure is simple.

Preferably, the length that the vacuum chamber front end is stretched out outside sheet frame is 5 millimeters~30 millimeters, guarantee gasket most Limits seal up chamber door and vacuum chamber.

Preferably, the length that the vacuum chamber front end is stretched out outside sheet frame is 10 millimeters~25 millimeters, preferably 15,19 and 22 millimeters, effect is best.

Detailed description of the invention

Fig. 1 is the perspective view of the utility model hypobaric chamber.

Fig. 2 is the perspective view of another angle of the utility model hypobaric chamber.

Fig. 3 is the perspective view of the utility model hypobaric chamber the first plate and the second plate.

Fig. 4 is the cross-sectional view of the utility model hypobaric chamber the first plate and the second plate.

Fig. 5 is the perspective view of the utility model hypobaric chamber jam plate and lock.

Fig. 6 is the perspective view that chamber door, cover board and gasket are removed in the utility model hypobaric chamber.

Fig. 7 is the perspective view that chamber door is removed in the utility model hypobaric chamber.

Wherein, 1, test box main body, 2, laboratory, 3, chamber door, 4, gasket, 5, test cover, 6, vacuum chamber, 7, sheet frame, 8, hinge, 9, door lock, the 10, first plate, the 11, second plate, the 12, first protrusion, the 13, second protrusion, 14, first through hole, 15, second Through-hole, 16, hinge bar, 17, jam plate, 18, lock, the 19, first fixation hole, the 20, second fixation hole, 21, sliding slot, 22, handle, 23, closing piece, 24, hook, 25, cylindrical protrusions, 26, rack, 27, cover board, 28, support plate.

Specific embodiment

The utility model is described in further detail with reference to the accompanying drawings and detailed description.

As shown, the utility model provides a kind of hypobaric chamber, including test box main body 1, the examination Tryoff main body 1 includes laboratory 2 and the chamber door 3 for being located at 2 front side of laboratory, and described 3 one end of chamber door is hinged on a left side for laboratory 2 Side, 3 other end of chamber door are connected to the right side of laboratory 2, and the chamber door 3 is equipped with gasket 4, the gasket 4 between laboratory 2 and chamber door 3, and the laboratory 2 includes test cover 5 and vacuum chamber 6, the test cover 5 and vacuum The equal front openings in room 6,5 leading flank of test cover are equipped with sheet frame 7 identical with test 5 opening shapes of cover, the sheet frame 7 It is open and is located at 5 opening of test cover in the projection of perpendicular in projecting for perpendicular, 6 front end of vacuum chamber is fixed on It is connected to outside in the sheet frame 7 and 6 front end gap Shen Jianyou of vacuum chamber, the gap and test box main body 1, the gasket 4 Be located at the position that sheet frame 7 is contacted with vacuum chamber 6, the gasket 4 between sheet frame 7 and chamber door 3, the sheet frame 7 with It is equipped with automatic adjustment chamber door 3 between chamber door 3 and is pressed in the self-regulation device of the tightness on sheet frame 7, the advantages of the utility model It is test specimen to be placed in laboratory 2 to carry out corresponding performance test, needs to keep vacuum state, laboratory 2 in laboratory 2 Interior sealing performance directly affects the accuracy rate of performance test, laboratory 2 is divided to test and covering 5 and vacuum chamber 6, in vacuum chamber 6 It vacuumizes, sets sheet frame 7 in 5 front side of test cover, 6 front end of vacuum chamber is allowed to be fixed in sheet frame 7, thus allow the upper table of vacuum chamber 6 Face, left and right side, bottom surface and trailing flank respectively with test cover 5 upper surface, left and right side, bottom surface (be also possible to bottom, Lower hollow) and trailing flank have gap, gasket 4 is set between sheet frame 7 and chamber door 3, due to being vacuum in vacuum chamber 6, and true It is atmospheric pressure outside empty room 6, the vacuum state in vacuum chamber 6 gasket 4 can be sucked on sheet frame 7, due to five of vacuum chamber 6 There is gap in face between test cover 5, while stretching out sheet frame 7 on front side of vacuum chamber 6 and forming protrusion, and such gasket 4 and outside are empty The contact area of gas increases gasket 4 and the contact area of vacuum chamber 6 simultaneously and also increases, and the vacuum state of vacuum chamber 6 more can be Gasket 4 is inhaled on sheet frame 7, is between test cover 5 and vacuum chamber 6 and is fixed on sheet frame 7 from dummy status, that is, vacuum chamber 6 On, vacuum chamber 6 is not contacted with laboratory 5, and such atmospheric pressure can be tightly pressed against gasket 4 on sheet frame 7, and vacuum chamber 6 can be close Packing 4 is inhaled on sheet frame 7, good seal performance, so that the accuracy rate of performance test is high.

The self-regulation device refers to that it further includes hinge 8 and hinge bar 16, and the hinge 8 includes 10 He of the first plate The second plate 11 being hinged with the first plate 10, first plate 10 are located at 7 left side of sheet frame, and second plate 11 is located at The side of 3 left side of chamber door, nearly second plate 11 of the first plate 10 is equipped with the first protrusion 12, second plate 11 nearly first The side of plate 10 is respectively equipped with two the second protrusions 13, and second protrusion 13 forms opening opening towards the first plate 10 Mouth slot, first protrusion 12 are stretched outside in open slot, and first protrusion 12 is radially equipped with first through hole 14, institute The second protrusion 13 stated radially is equipped with the second through-hole 15, and the both ends of the hinge bar 16 are located at the second through-hole 15 Interior, the middle section of the hinge bar 16 is located in first through hole 14, and the cross-sectional shape of second through-hole 15 is waist Shape through-hole, the hinge bar 16 can be moved forward and backward in the second through-hole 15, and the hinge bar 16 can drive the first protrusion 12 Be moved forward and backward in open slot, structure is simple, in a practical situation hypobaric chamber can according to the air pressure of vacuum chamber 6 come The tightness that chamber door 3 is pressed on sheet frame 7 and the leakproofness for ensuring vacuum chamber 6 are automatically adjusted, when the air pressure of vacuum chamber 6 becomes larger When, chamber door 3 is moved toward the direction far from vacuum chamber 6, and chamber door 3 drives the second plate 11 to move forward, when the air pressure of vacuum chamber 6 becomes smaller When, chamber door 3 is moved toward the direction of vacuum chamber 6, and chamber door 3 drives the second plate 11 to move backward, since the second through-hole 15 is logical for kidney-shaped Hole, hinge bar 16 is always situated in the second through-hole 15, that is to say, that due to there is the presence of the second through-hole 15, the second plate 11 can be former After move, automatic adjustment chamber door 3 be pressed in the tightness on sheet frame 7, high reliablity, good seal performance.

The first fixation holes 19 that first plate 10 is used to fix the first plate 10 equipped at least two, described first Fixation hole 19 is waist through hole, and the axis of first fixation hole 19 along its length is perpendicular to horizontal plane, adjustable the The upper and lower position of one plate 10, convenient for different installation site requirements.

The second fixation holes 20 that second plate 11 is used to fix the second plate 11 equipped at least two, described second Fixation hole 20 is waist through hole, and the axis of second fixation hole 20 along its length is parallel to horizontal plane, adjustable the The front-rear position of two plates 11, convenient for adjusting the spacing between the second plate 11 and the first plate 10, to adjust chamber door 3 and vacuum chamber 6 Between tightness, easy to use, high reliablity.

The self-regulation device refers to that it further includes the door lock 9 for controlling chamber door 3 and switching, and the door lock 9 includes jam plate 17 and lock 18, the jam plate 17 is located at 7 right side of sheet frame, and the lock 18 is located at 3 right side of chamber door, the jam plate 17 are equipped with sliding slot 21, and the axis of the sliding slot 21 is parallel to horizontal plane, is sliding combined with closing piece 23 in the sliding slot 21, Spring is equipped in the sliding slot 21, the spring one end is fixed in sliding slot 21, and the spring other end is fixed on lock On block 23, the lock 18 is equipped with handle 22, and described 22 one end of handle is rotatably assorted on lock 18, the handle 22 other ends may be stuck on closing piece 23, and the closing piece 23 synchronizing moving when handle 22 is moved forward and backward, structure is simple, in reality Hypobaric chamber can be pressed in the tightness on sheet frame 7 according to the air pressure of vacuum chamber 6 in situation come automatic control stuff box door 3 And ensure the leakproofness of vacuum chamber 6, when the air pressure of vacuum chamber 6 becomes larger, chamber door 3 is moved toward the direction far from vacuum chamber 6, chamber door 3 drive lock 18 to move forward, and lock 18 drives handle 22 to move forward simultaneously, and handle 22 drives closing piece 23 to be slidably fitted in cunning In slot 21, the spring for being at this moment connected to closing piece 23 is compressed, and when the air pressure of vacuum chamber 6 becomes smaller, chamber door 3 is toward the side of vacuum chamber 6 To movement, chamber door 3 drives lock 18 to move backward, and lock 18 drives handle 22 to move backward simultaneously, and the elastic force of spring drives lock Block 23 is slidably fitted in sliding slot 21, and automatic adjustment chamber door 3 is pressed in the tightness on sheet frame 7, high reliablity, sealing performance It is good.

23 upper surface of closing piece is equipped with cylindrical protrusions 25, and 22 other end of handle is hook 24, described The bar portion of hook 24 is located in cylindrical protrusions 25 and the hook portion of hook 24 is hooked in 25 side of cylindrical protrusions, convenient for opening and lock Firmly chamber door 3, structure are simple.

The rack 26 for placing test box main body 1,26 bottom of rack are equipped with below the test box main body 1 It being connected to in test cover 5,5 upper end of test cover is hollow, and the 5 upper end inner sidewall of test cover is equipped with support plate 28, The support plate 28 is equipped with the cover board 27 for covering test 5 upper end hollow spaces of cover, increases vacuum chamber 6 and test cover 5 Between gap, enable gasket 4 preferably to seal up vacuum chamber 6, effect is good, and the left side of test cover 5 and rear side can also be with Hollow as test 5 upper end formations of cover that cover board 27 is arranged simultaneously, test can be hollow under covering 5 but be not provided with cover board 27.

The support plate 28 is respectively distributed on four angles of test cover 5, the shape of 28 cross section of support plate For triangle, structure is simple.

The length that 6 front end of vacuum chamber is stretched out outside sheet frame 7 is 5 millimeters~30 millimeters, guarantees gasket 4 to greatest extent Seal up chamber door 3 and vacuum chamber 6.

The length that 6 front end of vacuum chamber is stretched out outside sheet frame 7 is 10 millimeters~25 millimeters, preferably 15,19 and 22 millimeters, Effect is best.

Specifically, the principles of the present invention are test specimen to be placed in laboratory 2 to carry out corresponding performance test, It needs to keep vacuum state in laboratory 2, the sealing performance in laboratory 2 directly affects the accuracy rate of performance test, test Room 2, which is divided, covers 5 and vacuum chamber 6 for test, vacuumizes in vacuum chamber 6, sets sheet frame 7 in 5 front side of test cover, makes 6 front end of vacuum chamber solid It is scheduled in sheet frame 7, thus allows upper surface, the left and right side of vacuum chamber 6, bottom surface and trailing flank are upper with test cover 5 respectively Surface, left and right side, there are gap in bottom surface (being also possible to bottom, lower hollow) and trailing flank, between sheet frame 7 and chamber door 3 It due to being vacuum in vacuum chamber 6, and is atmospheric pressure outside vacuum chamber 6, the vacuum state in vacuum chamber 6 can be sealing if gasket 4 Pad 4 is sucked on sheet frame 7, since there is gap in five faces of vacuum chamber 6 between test cover 5, while stretching out on front side of vacuum chamber 6 Sheet frame 7 forms protrusion, and such gasket 4 increases the contact surface of gasket 4 and vacuum chamber 6 simultaneously with the contact area of outside air Product also increase, the vacuum state of vacuum chamber 6 more can gasket 4 inhale on sheet frame 7, test cover 5 and vacuum chamber 6 between in from Dummy status, that is, vacuum chamber 6 are fixed on sheet frame 7, and vacuum chamber 6 is not contacted with laboratory 5, and such atmospheric pressure can be gasket 4 are tightly pressed against on sheet frame 7, and gasket 4 can be inhaled the good seal performance, so that performance test is accurate on sheet frame 7 by vacuum chamber 6 Rate is high.

The utility model preferred embodiment is described above, but is not to be construed as limiting the scope of the invention. The utility model is not only limited to above embodiments, and specific structure is allowed to vary, all in the utility model demand for independence Made various change is within the protection scope of the present utility model in protection scope.

Claims (10)

1. a kind of hypobaric chamber, including test box main body (1), the test box main body (1) includes laboratory (2) With the chamber door (3) being located on front side of laboratory (2), the chamber door (3) one end is hinged on the left side of laboratory (2), the case Door (3) other end is connected to the right side of laboratory (2), and the chamber door (3) is equipped with gasket (4), the gasket (4) Between laboratory (2) and chamber door (3), it is characterised in that: the laboratory (2) includes test cover (5) and vacuum chamber (6), the test cover (5) and vacuum chamber (6) equal front openings, test cover (5) leading flank, which is equipped with, covers (5) with test The identical sheet frame of opening shape (7), the sheet frame (7) opening are located at test cover (5) opening in the projection of perpendicular and are erecting In the projection of straight plane, the vacuum chamber (6) front end is fixed in sheet frame (7) and sheet frame (7) are stretched out in vacuum chamber (6) front end Outside, there is gap in five faces of the vacuum chamber (6) between test cover (5), and the gap and test box main body (1) are outside Portion's connection, the gasket (4) are located at the position that sheet frame (7) is contacted with vacuum chamber (6), and the gasket (4) is located at plate Automatic adjustment chamber door (3) is equipped between frame (7) and chamber door (3), between the sheet frame (7) and chamber door (3) to be pressed on sheet frame (7) Tightness self-regulation device.

2. hypobaric chamber according to claim 1, it is characterised in that: the self-regulation device refers to it also Including hinge (8) and hinge bar (16), the hinge (8) include the first plate (10) and be hinged with the first plate (10) the Two plates (11), first plate (10) are located at sheet frame (7) left side, and second plate (11) is located at chamber door (3) left side, The side of nearly second plate (11) of first plate (10) is equipped with first raised (12), nearly first plate of the second plate (11) (10) side is respectively equipped with two second raised (13), and described second raised (13) form an opening towards the first plate (10) open slot, described first raised (12) are stretched outside in open slot, and described first raised (12) are radially equipped with First through hole (14), described second raised (13) are radially equipped with the second through-hole (15), the hinge bar (16) Both ends be located in the second through-hole (15), it is interior that the middle section of the hinge bar (16) is located at first through hole (14), described The cross-sectional shape of second through-hole (15) is waist through hole, and the hinge bar (16) can move front and back in the second through-hole (15) Dynamic, the hinge bar (16) can drive first raised (12) to be moved forward and backward in open slot.

3. hypobaric chamber according to claim 2, it is characterised in that: first plate (10) is equipped with extremely Few two are used to fix the first fixation hole (19) of the first plate (10), and first fixation hole (19) is waist through hole, described The first fixation hole (19) axis along its length perpendicular to horizontal plane.

4. hypobaric chamber according to claim 2, it is characterised in that: second plate (11) is equipped with extremely Few two are used to fix the second fixation hole (20) of the second plate (11), and second fixation hole (20) is waist through hole, described The second fixation hole (20) axis along its length be parallel to horizontal plane.

5. hypobaric chamber according to claim 1, it is characterised in that: the self-regulation device refers to it also Door lock (9) including control chamber door (3) switch, the door lock (9) include jam plate (17) and lock (18), the jam plate (17) it is located at sheet frame (7) right side, the lock (18) is located at chamber door (3) right side, and the jam plate (17), which is equipped with, to be slided Slot (21), the axis of the sliding slot (21) are parallel to horizontal plane, are sliding combined with closing piece (23), institute in the sliding slot (21) Spring is equipped in the sliding slot (21) stated, the spring one end is fixed in sliding slot (21), and the spring other end is fixed on On closing piece (23), the lock (18) is equipped with handle (22), and the handle (22) one end is rotatably assorted in lock (18) On, the handle (22) other end may be stuck on closing piece (23), and the closing piece (23) is same when handle (22) are moved forward and backward Moved further.

6. hypobaric chamber according to claim 5, it is characterised in that: described closing piece (23) upper surface is equipped with Cylindrical protrusions (25), the handle (22) other end are hook (24), and the bar portion of the hook (24) is located at cylinder On raised (25) and the hook portion of hook (24) is hooked in cylindrical protrusions (25) side.

7. hypobaric chamber according to claim 1, it is characterised in that: below the test box main body (1) Equipped with the rack (26) for placing test box main body (1), it is connected in the rack (26) bottom and test cover (5), it is described Test cover (5) upper end it is hollow, test cover (5) the upper end inner sidewall is equipped with support plate (28), the support plate (28) it is equipped with the cover board (27) for covering test cover (5) upper end hollow space.

8. hypobaric chamber according to claim 7, it is characterised in that: the support plate (28) is distributed respectively On four angles of test cover (5), the shape of the support plate (28) cross section is triangle.

9. hypobaric chamber according to claim 1, it is characterised in that: vacuum chamber (6) front end is stretched out The length of sheet frame (7) outside is 5 millimeters~30 millimeters.

10. hypobaric chamber according to claim 9, it is characterised in that: vacuum chamber (6) front end is stretched out The length of sheet frame (7) outside is 10 millimeters~25 millimeters.