Vacuum high-temperature test box

Abstract

The present invention relates to the technical field of test boxes. Disclosed is a vacuum high-temperature test box, comprising a longitudinal height adjustment mechanism and a telescopic movable connection mechanism. In the vacuum high-temperature test box, when a box body is closed by a box cover, a downward suction force is formed on the box cover due to a suction force formed by vacuum, and the box body and the box cover have a longitudinal movement and universal connection relationship, such that the box cover is tightly closed at the top of the box body under the action of the suction force, and the box cover has an adaptive angle adjustment function. As a result, sealing strips at various positions are uniformly pressed, and a uniform pressure distribution effect is achieved, thereby achieving a consistent sealing effect.

Description

Vacuum high temperature test chamber TECHNICAL FIELD

[0001] The present application relates to the technical field of test chambers, in particular to a vacuum high temperature test chamber. BACKGROUND

[0002] A high temperature vacuum test chamber is a device used for testing, researching and simulating materials (such as silicon carbide composite ceramic materials, monocrystalline nitride materials, etc.) under high temperature and vacuum conditions. It provides a closed environment for controlling temperature and pressure to simulate actual application environments under high temperature and vacuum.

[0003] For example, the Chinese patent with publication number "CN221046101U" discloses a "vacuum high temperature test chamber", which mainly includes a box body, a box cover, a moving assembly, a supporting assembly and a heating assembly. The box cover is rotationally connected to the outside of the box body, the supporting assembly is installed inside the box body, the moving assembly is installed inside the supporting assembly, and the heating assembly is installed on the top outer wall of the box body. The heating assembly extends into the interior of the box body. The vacuum high temperature test chamber sets the moving assembly to place test items in the box body, covers the box cover, heats the interior of the box body through the heating assembly, and makes the surface of the support frame more uniform by uniformly surrounding the support frame, so that the items placed on the box inside are uniformly heated. After heating is completed, the box cover is opened, the spring pushes the moving block, and the moving block is slidably connected with the moving slot, so that the placing box is conveniently sent to the outside of the box body, and the test items are conveniently taken out.

[0004] However, in actual work, since the box body and the box cover are rotationally connected around the hinge shaft as the center line, the sealing strips of the box body and the box cover near the hinge shaft part and the sealing strips of the box body and the box cover away from the hinge shaft part have a difference in movement between them during the rotational closing process. Therefore, the sealing strips of the box body and the box cover at different parts are not uniformly sealed after being closed, resulting in inconsistent sealing pressure and uneven sealing effect.

[0005] SUMMARY

[0006] In view of the deficiencies of the prior art, the present application provides a vacuum high temperature test chamber. When the box body and the box cover are closed, the vacuum formed suction force forms a downward suction force on the box cover. The box body and the box cover have a longitudinal movement and universal connection relationship. Therefore, the box cover is tightly closed on the top of the box body under the action of the suction force. The box cover has a self-adaptive angle adjustment function, so that the sealing strips at different parts are uniformly pressed and have a uniform pressure dispersion effect, thereby having a consistent sealing effect, solving the above technical problems.

[0007] In order to achieve the above object, the present application provides the following technical scheme: a vacuum high-temperature test box, comprising a cylindrical box body, a vacuum test cavity arranged inside the cylindrical box body and having an open top end, a box cover placing groove arranged at the top end of the vacuum test cavity, a disc-shaped box cover capable of being covered in the box cover placing groove, an annular sealing strip placed in the cylindrical box body and the disc-shaped box cover, a longitudinal fixing rod integrally arranged at the bottom end of the disc-shaped box cover, a storage shell mounted at the bottom end of the longitudinal fixing rod and capable of being inserted into the vacuum test cavity, a first gas flow hole arranged at the circumferential side of the cylindrical box body and communicating with the vacuum test cavity, a longitudinal height adjusting mechanism, an inside of which is provided with a longitudinal threaded sleeve capable of rotating at one side of the cylindrical box body, a lower longitudinal threaded rod and an upper longitudinal threaded rod symmetrically mounted in the longitudinal threaded sleeve and capable of changing the longitudinal height when the longitudinal threaded sleeve rotates, and a polygonal limiting rod capable of preventing the lower longitudinal threaded rod and the upper longitudinal threaded rod from rotating with the rotation of the longitudinal threaded sleeve, and a telescopic movable connecting mechanism, an inside of which is provided with a first longitudinal hollow shell moving with the upper longitudinal threaded rod, a longitudinal movable plate arranged inside the first longitudinal hollow shell and capable of moving longitudinally relative to the first longitudinal hollow shell, a hemispherical shell fixedly mounted at the upper end surface of the disc-shaped box cover, and a ball head movably placed in the hemispherical shell and capable of moving with the longitudinal movable plate.

[0008] Preferably, the longitudinal height adjusting mechanism comprises a longitudinal threaded sleeve, a lower half of the longitudinal threaded sleeve is provided with a lower threaded hole having an open bottom end, an upper half of the longitudinal threaded sleeve is provided with an upper threaded hole having an open top end, the longitudinal threaded sleeve is provided with the lower longitudinal threaded rod through a lower threaded structure when located in the lower threaded hole, the longitudinal threaded sleeve is provided with the upper longitudinal threaded rod through an upper threaded structure when located in the upper threaded hole, the longitudinal threaded sleeve is fixedly provided with the polygonal limiting rod inside, and the lower longitudinal threaded rod and the upper longitudinal threaded rod are both provided with polygonal limiting holes for placing the polygonal limiting rod at opposite end surfaces, a first fixing plate is fixedly mounted at the bottom end of the lower longitudinal threaded rod, a transverse linkage beam is fixedly mounted at the top end of the upper longitudinal threaded rod, a longitudinal linkage beam extending downward in an integral structure is arranged at the lower surface of one side of the transverse linkage beam, and a first component fixing groove recessed upward is arranged at the bottom end of the longitudinal linkage beam.

[0009] Preferably, the polygonal limiting hole has a polygonal structure in cross-sectional structure shape, and the polygonal limiting hole has a polygonal structure in cross-sectional structure size.

[0010] Preferably, the lower threaded structure comprises an internal threaded structure arranged on the circumferential surface of the lower threaded hole and an external threaded structure arranged on the body of the lower longitudinal threaded rod, the upper threaded structure comprises an internal threaded structure arranged on the circumferential surface of the upper threaded hole and an external threaded structure arranged on the body of the upper longitudinal threaded rod, and the helical direction of the lower threaded structure is opposite to that of the upper threaded structure.

[0011] Preferably, the telescopic movable connection mechanism comprises a first longitudinal hollow shell and a semispherical shell, the upper end surface of the first longitudinal hollow shell is provided with a fixed shaft structure which is integrally formed with the first longitudinal hollow shell and fixedly installed in the interior of the first component fixed slot, the interior of the first longitudinal hollow shell is provided with a first longitudinal component movable cavity, the bottom end of the first longitudinal hollow shell is provided with a first component through hole which communicates the space below the first longitudinal hollow shell with the bottom end of the first longitudinal component movable cavity, the first longitudinal hollow shell is provided with a longitudinal movable plate which can move axially along the first longitudinal component movable cavity in the interior of the first longitudinal component movable cavity, the upper surface of the longitudinal movable plate is provided with a helical spring in a compressed state, the bottom surface of the longitudinal movable plate is fixedly installed with a first movable shaft which penetrates the first component through hole, the bottom end of the first movable shaft is fixedly installed with a ball head, the interior of the semispherical shell is provided with a semispherical accommodation slot which is open at the top, the ball head is accommodated in the interior of the semispherical accommodation slot, and the bottom of the semispherical shell is provided with a second fixed plate which is integrally formed with the semispherical shell and fixedly installed on the upper surface of the disc-shaped box cover.

[0012] Preferably, the structure radius of the semispherical accommodation slot is consistent with the structure radius of the ball head, and the depth of the semispherical accommodation slot is greater than the structure radius of the ball head and less than the structure diameter of the ball head.

[0013] Preferably, the center of the ball head coincides with the circle of the semispherical accommodation slot, and both are on the extension line of the axial line of the disc-shaped box cover.

[0014] Preferably, the telescopic movable connection mechanism further comprises a pressure-reducing exhaust mechanism which is provided with a second longitudinal hollow shell fixedly installed on the side surface of the cylindrical box body and capable of realizing gas flow in the interior, a ball valve located in the interior of the second longitudinal hollow shell and capable of preventing gas from flowing into the vacuum experiment cavity under its own gravity, and a cylindrical valve body capable of driving the ball valve to move upward so as to contact and reversely limit the gas.

[0015] Preferably, the pressure reducing exhaust mechanism comprises a spherical cavity arranged inside a second longitudinal hollow shell, a first gas passage of integral structure with the second longitudinal hollow shell and fixedly installed on the outer circumferential surface of the cylindrical box is arranged at the bottom end of the second longitudinal hollow shell, the two ends of the first gas passage are communicated with the bottom end of the spherical cavity and the first gas flow hole respectively, a second longitudinal component movable cavity is arranged at the top end of the spherical cavity of the second longitudinal hollow shell, a second gas passage is arranged inside the second longitudinal hollow shell and communicated with the outer circumferential surface and the side surface of the second longitudinal component movable cavity, a cylindrical valve body capable of moving in the region above the second gas passage along the second longitudinal component movable cavity is arranged inside the second longitudinal component movable cavity of the cylindrical box, a push-pull rod of integral structure with the cylindrical valve body is arranged on the upper end surface of the cylindrical valve body, a wire rope penetrating through the second longitudinal component movable cavity is fixedly installed at the bottom end of the cylindrical valve body, and a ball valve is fixedly installed at the bottom end of the wire rope.

[0016] Preferably, the structure radius of the ball valve is greater than the structure radius of the first gas passage inner hole and the structure radius of the second longitudinal component movable cavity, and the structure radius of the second longitudinal component movable cavity is greater than the rope diameter of the wire rope.

[0017] Compared with the prior art, the vacuum high-temperature test box has the following beneficial effects:

[0018] 1. When the box body and the box cover are closed, the suction force formed by the vacuum forms a downward suction force on the box cover, and the box body and the box cover have a longitudinal movement and universal connection relationship, so that the box cover is tightly closed on the top of the box body under the action of the suction force, and the box cover has a self-adaptive angle adjustment function, so that the sealing strips at each position are uniformly pressed, have a uniform pressure distribution effect, and have a consistent sealing effect.

[0019] 2. By arranging the longitudinal height adjusting mechanism, when the longitudinal threaded sleeve is rotated, the lower longitudinal threaded rod and the upper longitudinal threaded rod will move away from each other or move close to each other, thereby driving the disc-shaped box cover to be opened upward or closed downward, thereby realizing the opening and closing of the disc-shaped box cover.

[0020] 3, By setting the telescopic movable connecting mechanism, when the disc-shaped box cover is inserted into the box cover placing groove, the continued downward movement will make the spiral spring be compressed, at the same time, the elastic pressure formed by the spiral spring will act on the contact surface between the disc-shaped box cover and the cylindrical box body, at the same time, the suction force of the gas will generate a downward force on the disc-shaped box cover, the pressure formed by the force at each part of the disc-shaped box cover is consistent, therefore, the disc-shaped box cover will move on the axis of the vacuum experiment chamber, and the disc-shaped box cover is closed in the box cover placing groove, and the ball head can rotate in the semispherical placing groove according to the different stress angles, so that the disc-shaped box cover has the function of self-adapting angle adjustment. BRIEF DESCRIPTION OF DRAWINGS

[0021] Fig. 1 is a perspective view of the present application;

[0022] Fig. 2 is a perspective view of the present application;

[0023] Fig. 3 is a perspective view of the cylindrical box body, the annular sealing strip, the longitudinal fixed rod, the storage shell and the disc-shaped box cover in the present application;

[0024] Fig. 4 is a perspective view of the longitudinal height adjusting mechanism in the present application;

[0025] Fig. 5 is a perspective view of the polygonal limiting rod in the present application;

[0026] Fig. 6 is a perspective view of the telescopic movable connecting mechanism in the present application;

[0027] Fig. 7 is a perspective view of the telescopic movable connecting mechanism in the present application;

[0028] Fig. 8 is a perspective view of the decompression exhaust mechanism in the present application.

[0029] Wherein: 1, cylindrical box body; 2, vacuum test chamber; 3, box cover placing groove; 4, annular sealing strip; 5, longitudinal fixed rod; 6, storage shell; 7, No. 1 gas flow hole; 8, longitudinal height adjusting mechanism; 81, longitudinal threaded sleeve; 82, lower threaded hole; 83, upper threaded hole; 84, lower threaded structure; 85, upper threaded structure; 86, lower longitudinal threaded rod; 87, upper longitudinal threaded rod; 88, No. 1 fixed plate; 89, transverse linkage beam; 810, longitudinal linkage beam; 811, No. 1 component fixed groove; 812, polygonal limiting hole; 813, polygonal limiting rod; 9, telescopic movable connection mechanism; 91, No. 1 longitudinal hollow shell; 92, No. 1 longitudinal component movable cavity; 93, fixed shaft structure; 94, No. 1 component perforation; 95, longitudinal movable plate; 96, spiral spring; 97, No. 1 movable shaft; 98, semispherical shell; 99, No. 2 fixed plate; 910, semispherical placing groove; 911, ball head; 10, pressure reducing exhaust mechanism; 101, No. 2 longitudinal hollow shell; 102, spherical cavity; 103, No. 1 gas passage; 104, ball valve; 105, No. 2 longitudinal component movable cavity; 106, No. 2 gas passage; 107, cylindrical valve body; 108, push-pull rod; 109, string; 11, disc-shaped box cover. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0031] Please refer to FIG. 1, FIG. 2 and FIG. 3, a vacuum high-temperature test box, comprising a cylindrical box body 1, a vacuum test chamber 2 arranged inside the cylindrical box body 1 and having an open top end, a box cover placing groove 3 arranged at the top end of the vacuum test chamber 2, a disc-shaped box cover 11 capable of being covered in the box cover placing groove 3, an annular sealing strip 4 placed in the cylindrical box body 1 and the disc-shaped box cover 11, a longitudinal fixed rod 5 integrally arranged at the bottom end of the disc-shaped box cover 11, a storage shell 6 mounted at the bottom end of the longitudinal fixed rod 5 and capable of being inserted into the inside of the vacuum test chamber 2, and a No. 1 gas flow hole 7 arranged at the circumferential side of the cylindrical box body 1 and communicating with the vacuum test chamber 2. The object to be detected is placed into the storage shell 6, and the storage shell 6 is inserted into the inside of the vacuum test chamber 2, so that the disc-shaped box cover 11 is closed inside the box cover placing groove 3, and high-temperature vacuum detection can be performed.

[0032] In order to achieve the opening and closing of the disc-shaped box cover 11, please refer to Figure 1, Figure 2, Figure 4 and Figure 5, it is necessary to set the longitudinal height adjusting mechanism 8, which is internally provided with a longitudinal threaded sleeve 81 located on one side of the cylindrical box body 1 and capable of rotating, a lower longitudinal threaded rod 86 and an upper longitudinal threaded rod 87 symmetrically installed in the longitudinal threaded sleeve 81 and capable of changing the longitudinal height when the longitudinal threaded sleeve 81 rotates, and a polygonal limiting rod 813 capable of preventing the lower longitudinal threaded rod 86 and the upper longitudinal threaded rod 87 from rotating with the longitudinal threaded sleeve 81. When the longitudinal threaded sleeve 81 is rotated, due to the lower threaded structure 84 comprising an internal threaded structure provided on the circumferential surface of the lower threaded hole 82 and an external threaded structure provided on the rod body of the lower longitudinal threaded rod 86, the upper threaded structure 85 comprising an internal threaded structure provided on the circumferential surface of the upper threaded hole 83 and an external threaded structure provided on the rod body of the upper longitudinal threaded rod 87, and the spiral direction of the lower threaded structure 84 being opposite to the spiral direction of the upper threaded structure 85, the lower longitudinal threaded rod 86 and the upper longitudinal threaded rod 87 will move correspondingly, and the cross-sectional structure of the polygonal limiting hole 812 is consistent with the cross-sectional structure of the polygonal limiting rod 813, both being polygonal structures, and the cross-sectional structure size of the polygonal limiting hole 812 matches the cross-sectional structure size of the polygonal limiting rod 813, which will cause the lower longitudinal threaded rod 86 and the upper longitudinal threaded rod 87 to move away from each other or move closer to each other, thereby driving the disc-shaped box cover 11 to open upward or close downward, thereby achieving the opening and closing of the disc-shaped box cover 11.

[0033] Regarding the specific structure of the longitudinal height adjusting mechanism 8, please refer to Figure 4 and Figure 5, which includes a longitudinal threaded sleeve 81, the lower half of which is provided with a lower threaded hole 82 with an open bottom end, and the upper half of which is provided with an upper threaded hole 83 with an open top end. The longitudinal threaded sleeve 81 is installed with a lower longitudinal threaded rod 86 in the lower threaded hole 82 through a lower threaded structure 84, and is installed with an upper longitudinal threaded rod 87 in the upper threaded hole 83 through an upper threaded structure 85. A polygonal limiting rod 813 is fixedly installed inside the longitudinal threaded sleeve 81, and polygonal limiting holes 812 for placing the polygonal limiting rod 813 are provided on the opposite end faces of the lower longitudinal threaded rod 86 and the upper longitudinal threaded rod 87. A No. 1 fixed plate 88 is fixedly installed at the bottom end of the lower longitudinal threaded rod 86, and a transverse linkage beam 89 is fixedly installed at the top end of the upper longitudinal threaded rod 87. A longitudinal linkage beam 810 with an integral structure extending downward is provided on the lower surface of one side of the transverse linkage beam 89, and a No. 1 component fixing groove 811 recessed upward is provided at the bottom end of the longitudinal linkage beam 810.

[0034] In order to make the disc-shaped box cover 11 have the self-adapting angle adjustment function, please refer to FIG. 1, FIG. 2, FIG. 6 and FIG. 7, the telescopic movable connecting mechanism 9 is needed to be arranged, which is internally provided with a first longitudinal hollow shell 91 moving with the longitudinal screw rod 87, a longitudinal movable plate 95 being internally arranged in the first longitudinal hollow shell 91 and being longitudinally movable relative to the first longitudinal hollow shell 91, a hemispherical shell 98 being fixedly installed on the upper end surface of the disc-shaped box cover 11, and a ball head 911 movably arranged in the hemispherical shell 98 and being movable with the longitudinal movable plate 95. The first longitudinal hollow shell 91 drives the disc-shaped box cover 11 to move downward, when the disc-shaped box cover 11 is inserted into the box cover placing groove 3, the continuous downward movement will make the coil spring 96 be compressed, at the same time, the elastic pressure formed by the coil spring 96 will act on the contact surface between the disc-shaped box cover 11 and the cylindrical box body 1, at the same time, when the gas in the vacuum experiment cavity 2 is extracted to form the vacuum phenomenon, the suction force of the gas will generate the downward force on the disc-shaped box cover 11, the pressure formed by the force at each part of the disc-shaped box cover 11 is consistent, thus, the disc-shaped box cover 11 will move on the axis of the vacuum experiment cavity 2, and the disc-shaped box cover 11 is closed in the box cover placing groove 3, and the ball head 911 can rotate in the hemispherical placing groove 910 according to the different force angles, so that the disc-shaped box cover 11 has the self-adapting angle adjustment function.

[0035] The specific structure of the telescopic movable connecting mechanism 9 is shown in FIGS. 6 and 7. The telescopic movable connecting mechanism 9 comprises a first longitudinal hollow shell 91 and a semispherical shell 98. The first longitudinal hollow shell 91 has a fixed shaft structure 93 at the center of its upper end surface, which is integrally formed with the first longitudinal hollow shell 91 and fixedly installed inside a first component fixed slot 811. The first longitudinal hollow shell 91 has a first longitudinal component movable cavity 92 inside. The bottom end of the first longitudinal hollow shell 91 is provided with a first component through hole 94, which is in communication with the space below and the bottom end of the first longitudinal component movable cavity 92. The first longitudinal hollow shell 91 is provided with a longitudinal movable plate 95 inside the first longitudinal component movable cavity 92, which can move axially along the first longitudinal component movable cavity 92. The upper surface of the longitudinal movable plate 95 is provided with a compressed coil spring 96. The lower surface of the longitudinal movable plate 95 is fixedly installed with a first movable shaft 97, which penetrates the first component through hole 94. The bottom end of the first movable shaft 97 is fixedly installed with a ball head 911. The semispherical shell 98 is provided with a semispherical accommodation slot 910 with an open top inside. The ball head 911 is accommodated inside the semispherical accommodation slot 910. The bottom of the semispherical shell 98 is provided with a second fixed plate 99, which is integrally formed with the semispherical shell 98 and fixedly installed on the upper surface of the disc-shaped box cover 11. The structure radius of the semispherical accommodation slot 910 is consistent with the structure radius of the ball head 911. The depth of the semispherical accommodation slot 910 is greater than the structure radius of the ball head 911 and less than the structure diameter of the ball head 911. The center of the ball head 911 coincides with the circle of the semispherical accommodation slot 910, and both are on the extension line of the axial center line of the disc-shaped box cover 11.

[0036] In order to reduce the negative impact of vacuum on the pumping equipment, please refer to Figure 1, Figure 2 and Figure 8, it is necessary to set the pressure relief exhaust mechanism 10, which is internally provided with a No. 2 longitudinal hollow shell 101 mounted on the side of the cylindrical box 1 and internally capable of realizing gas flow, a ball valve 104 located inside the No. 2 longitudinal hollow shell 101 and capable of preventing gas from flowing into the vacuum experiment chamber 2 under its own gravity, and a cylindrical valve body 107 capable of driving the ball valve 104 to move upward to contact the gas reverse restriction, connecting the gas circuit of the pumping equipment and the No. 2 gas passage 106 through the pipeline. When the pumping equipment is turned on, the gas in the vacuum experiment chamber 2 will be sequentially pumped out through the No. 1 gas flow hole 7, the No. 1 gas passage 103, the spherical cavity 102, the No. 2 longitudinal component movable cavity 105 and the No. 2 gas passage 106, so that the inside of the spherical cavity 102 forms a vacuum negative pressure state. In this process, external gas wants to flow back into the vacuum experiment chamber 2 through the No. 1 gas passage 103, but at this time, the ball valve 104 is blocked at the top end of the No. 1 gas passage 103 under the action of gravity, thereby preventing the gas backflow from causing the vacuum to continue to occur. When the work is completed, pull the push-pull rod 108 upward. When the pulling force is greater than the suction force formed by the vacuum, the ball valve 104 will be unblocked to the No. 1 gas passage 103, and the gas can be normally supplemented into the vacuum experiment chamber 2, thereby eliminating the vacuum phenomenon and facilitating the subsequent removal of the goods.

[0037] Regarding the specific structure of the pressure relief exhaust mechanism 10, please refer to Figure 8, which includes a spherical cavity 102 inside the No. 2 longitudinal hollow shell 101, a No. 1 gas passage 103 integrally formed with the bottom end of the No. 2 longitudinal hollow shell 101 and fixedly installed on the outer circumferential surface of the cylindrical box 1, both ends of the No. 1 gas passage 103 respectively communicating with the bottom end of the spherical cavity 102 and the No. 1 gas flow hole 7, a No. 2 longitudinal component movable cavity 105 provided at the top end of the spherical cavity 102, a No. 2 gas passage 106 provided inside the No. 2 longitudinal hollow shell 101 and communicating with the outer circumferential surface and the side of the No. 2 longitudinal component movable cavity 105, a cylindrical valve body 107 capable of moving along the No. 2 longitudinal component movable cavity 105 above the No. 2 gas passage 106 inside the No. 2 longitudinal component movable cavity 105 of the cylindrical box 1, a push-pull rod 108 integrally formed with the upper end surface of the cylindrical valve body 107, a string 109 fixedly installed at the bottom end of the cylindrical valve body 107 and penetrating through the No. 2 longitudinal component movable cavity 105, and a ball valve 104 fixedly installed at the bottom end of the string 109. The structural radius of the ball valve 104 is greater than the structural radius of the inner hole of the No. 1 gas passage 103 and the structural radius of the No. 2 longitudinal component movable cavity 105. The structural radius of the No. 2 longitudinal component movable cavity 105 is greater than the rope diameter of the string 109.

[0038] The specific working principle of the present application is that the detected object is placed into the object housing 6, and the gas circuit of the air extraction device is connected to the second gas passage 106 through a pipeline;

[0039] When the longitudinal threaded sleeve 81 is rotated, the lower longitudinal threaded rod 86 and the upper longitudinal threaded rod 87 will move away from or close to each other, thereby driving the disc-shaped cover 11 to open upward or close downward, so as to open and close the disc-shaped cover 11, and the object housing 6 is inserted into the vacuum experiment cavity 2, and the disc-shaped cover 11 is closed in the box cover placing groove 3;

[0040] When the air extraction device is turned on, the gas in the vacuum experiment cavity 2 will be sequentially extracted through the first gas flow hole 7, the first gas passage 103, the spherical cavity 102, the second longitudinal component movable cavity 105, and the second gas passage 106, so that the inside of the spherical cavity 102 forms a vacuum negative pressure state. During this process, external gas attempts to flow back into the vacuum experiment cavity 2 through the first gas passage 103, but at this time, the ball valve 104 is blocked at the top end of the first gas passage 103 under the action of gravity, thereby preventing the backflow of gas from causing the vacuum to continue to occur;

[0041] The disc-shaped cover 11 is driven by the first longitudinal hollow shell 91 to move downward, and when the disc-shaped cover 11 is inserted into the box cover placing groove 3, continued downward movement will cause the compression of the spiral spring 96. At the same time, the elastic pressure formed by the spiral spring 96 will act between the contact surface of the disc-shaped cover 11 and the cylindrical box 1. When the gas in the vacuum experiment cavity 2 is extracted to form a vacuum, the suction force of the gas will generate a downward force on the disc-shaped cover 11, thereby causing the annular sealing strip 4 between the disc-shaped cover 11 and the cylindrical box 1 to be in close contact;

[0042] When the work is completed, the push-pull rod 108 is pulled upward, and when the pulling force is greater than the suction force formed by the vacuum, the ball valve 104 will be unblocked from the first gas passage 103, and the gas can be normally supplemented into the vacuum experiment cavity 2, thereby eliminating the vacuum phenomenon and facilitating the subsequent removal of the object.

[0043] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and deformations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A vacuum high-temperature test chamber, comprising a cylindrical chamber body (1), a vacuum test cavity (2) arranged inside the cylindrical chamber body (1) and having an open top end, a chamber cover placing groove (3) arranged at the top end of the vacuum test cavity (2), a disc-shaped chamber cover (11) capable of being covered in the chamber cover placing groove (3), an annular sealing strip (4) placed in the cylindrical chamber body (1) and the disc-shaped chamber cover (11), a longitudinal fixing rod (5) integrally arranged at the bottom end of the disc-shaped chamber cover (11), a storage shell (6) mounted at the bottom end of the longitudinal fixing rod (5) and capable of being inserted into the inside of the vacuum test cavity (2), and a first gas flow hole (7) arranged at the circumferential side of the cylindrical chamber body (1) and communicating with the vacuum test cavity (2), characterized in that: Also includes, The longitudinal height adjusting mechanism (8) is internally provided with a longitudinal threaded sleeve (81) located on one side of the cylindrical box body (1) and capable of rotating, a lower longitudinal threaded rod (86) and an upper longitudinal threaded rod (87) symmetrically installed in the longitudinal threaded sleeve (81) and capable of changing the longitudinal height when the longitudinal threaded sleeve (81) rotates, and a polygonal limiting rod (813) capable of preventing the lower longitudinal threaded rod (86) and the upper longitudinal threaded rod (87) from rotating with the longitudinal threaded sleeve (81); And a telescopic movable connection mechanism (9) internally provided with a first longitudinal hollow shell (91) moving with the upper longitudinal threaded rod (87), a longitudinal movable plate (95) located inside the first longitudinal hollow shell (91) and capable of moving longitudinally relative to the first longitudinal hollow shell (91), a hemispherical shell (98) fixedly installed on the upper end surface of the disc-shaped box cover (11), and a ball head (911) movably placed in the hemispherical shell (98) and capable of moving with the longitudinal movable plate (95).

2. The vacuum high temperature test chamber of claim 1, wherein: The longitudinal height adjusting mechanism (8) includes a longitudinal threaded sleeve (81), the lower half of the longitudinal threaded sleeve (81) is provided with a lower threaded hole (82) with an open bottom end, the upper half of the longitudinal threaded sleeve (81) is provided with an upper threaded hole (83) with an open top end, the longitudinal threaded sleeve (81) is installed with a lower longitudinal threaded rod (86) through a lower threaded structure (84) in the lower threaded hole (82), the longitudinal threaded sleeve (81) is installed with an upper longitudinal threaded rod (87) through an upper threaded structure (85) in the upper threaded hole (83), a polygonal limiting rod (813) is fixedly installed inside the longitudinal threaded sleeve (81), and the lower longitudinal threaded rod (86) and the upper longitudinal threaded rod (87) are provided with polygonal limiting holes (812) for placing the polygonal limiting rod (813) on opposite end surfaces, a first fixed plate (88) is fixedly installed at the bottom end of the lower longitudinal threaded rod (86), a transverse linkage beam (89) is fixedly installed at the top end of the upper longitudinal threaded rod (87), a longitudinal linkage beam (810) in an integral structure extending downward is provided on the lower surface of one side of the transverse linkage beam (89), and a first component fixing groove (811) recessed upward is provided at the bottom end of the longitudinal linkage beam (810).

3. A vacuum high temperature test chamber as claimed in claim 2, wherein: The cross-sectional structure of the polygonal limiting hole (812) is consistent with the cross-sectional structure of the polygonal limiting rod (813), both are polygonal structures, and the cross-sectional structure size of the polygonal limiting hole (812) matches the cross-sectional structure size of the polygonal limiting rod (813).

4. A vacuum high temperature test chamber as claimed in claim 3, wherein: The lower threaded structure (84) comprises an internal threaded structure arranged on the circumferential surface of the lower threaded hole (82) and an external threaded structure arranged on the rod body of the lower longitudinal threaded rod (86), the upper threaded structure (85) comprises an internal threaded structure arranged on the circumferential surface of the upper threaded hole (83) and an external threaded structure arranged on the rod body of the upper longitudinal threaded rod (87), and the screw direction of the lower threaded structure (84) is opposite to that of the upper threaded structure (85).

5. A vacuum high temperature test chamber as claimed in claim 4, wherein: The telescopic movable connecting mechanism (9) comprises a first longitudinal hollow shell (91) and a semispherical shell (98), the center of the upper end surface of the first longitudinal hollow shell (91) is provided with a fixed shaft structure (93) which is of integral structure with the first longitudinal hollow shell (91) and is fixedly installed in the first part fixed groove (811), the inside of the first longitudinal hollow shell (91) is provided with a first longitudinal part movable cavity (92), the bottom end of the first longitudinal hollow shell (91) is provided with a first part perforation (94) which communicates with the space below and the bottom end of the first longitudinal part movable cavity (92), the first longitudinal hollow shell (91) is provided with a longitudinal movable plate (95) which can move axially along the first longitudinal part movable cavity (92) in the inside of the first longitudinal part movable cavity (92), the upper surface of the longitudinal movable plate (95) is provided with a spiral spring (96) in a compressed state, the lower surface of the longitudinal movable plate (95) is fixedly installed with a first movable shaft (97) which penetrates through the first part perforation (94), the bottom end of the first movable shaft (97) is fixedly installed with a ball head (911), the inside of the semispherical shell (98) is provided with a semispherical placing groove (910) which is open at the top, the ball head (911) is placed in the inside of the semispherical placing groove (910), and the bottom of the semispherical shell (98) is provided with a second fixed plate (99) which is of integral structure with the semispherical shell (98) and is fixedly installed on the upper surface of the disc-shaped box cover (11).

6. A vacuum high temperature test chamber as claimed in claim 5, wherein: The structural radius of the semispherical placing groove (910) is consistent with that of the ball head (911), and the depth of the semispherical placing groove (910) is greater than the structural radius of the ball head (911) and smaller than the structural diameter of the ball head (911).

7. A vacuum high temperature test chamber as claimed in claim 6, wherein: The center of the ball head (911) coincides with the circle of the semispherical placing groove (910), and both are on the extension line of the axial line of the disc-shaped box cover (11).

8. A vacuum high temperature test chamber according to any one of claims 1-7, characterized in that: The decompression exhaust mechanism (10) is further provided, which is internally provided with a second longitudinal hollow shell (101) which is installed on the side surface of the cylindrical box body (1) and can realize the flow of gas, a ball valve (104) which is located in the inside of the second longitudinal hollow shell (101) and can prevent the flow of gas into the vacuum experiment cavity (2) under its own gravity, and a cylindrical valve body (107) which can drive the ball valve (104) to move upward to contact the reverse restriction of the gas.

9. A vacuum high temperature test chamber as claimed in claim 8, wherein: The pressure reducing exhaust mechanism (10) comprises a spherical cavity (102) arranged inside a second longitudinal hollow shell (101), a first gas passage (103) of an integral structure with the second longitudinal hollow shell (101) and fixedly installed on the outer circumferential surface of the cylindrical box (1) is arranged at the bottom end of the second longitudinal hollow shell (101), two ends of the first gas passage (103) are respectively communicated with the bottom end of the spherical cavity (102) and the first gas flow hole (7), a second longitudinal component movable cavity (105) is arranged at the top end of the spherical cavity (102) of the second longitudinal hollow shell (101), a second gas passage (106) is arranged inside the second longitudinal hollow shell (101) and communicated with the outer circumferential surface and the side surface of the second longitudinal component movable cavity (105), a cylindrical valve body (107) capable of moving in the region above the second gas passage (106) along the second longitudinal component movable cavity (105) is arranged inside the second longitudinal component movable cavity (105) of the cylindrical box (1), a push-pull rod (108) of an integral structure with the cylindrical valve body (107) is arranged on the upper end surface of the cylindrical valve body (107), a wire rope (109) penetrating through the second longitudinal component movable cavity (105) is fixedly installed at the bottom end of the cylindrical valve body (107), and a ball valve (104) is fixedly installed at the bottom end of the wire rope (109).

10. A vacuum high temperature test chamber as claimed in claim 9, wherein: The structural radius of the ball valve (104) is greater than the structural radius of the first gas passage (103) and the structural radius of the second longitudinal component movable cavity (105), and the structural radius of the second longitudinal component movable cavity (105) is greater than the rope diameter of the wire rope (109).

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