CN218152528U - Pressure release module and explosion-proof high-low temperature damp-heat test box thereof - Google Patents

Abstract

A pressure relief module and an explosion-proof high-low temperature damp-heat test box thereof are disclosed, wherein the pressure relief module is arranged on a box body, the box body is also provided with a pressure relief groove and a test cavity, one end of the pressure relief groove is communicated with the test cavity, and the other end of the pressure relief groove penetrates through the box body; the pressure relief door comprises a bottom plate, wherein the bottom plate is arranged on a box body, a sealing frame is arranged on the bottom plate, a sealing installation groove is formed in the sealing frame, the sealing installation groove is fixedly assembled with a sealing installation part of a sealing strip, the sealing strip is in extrusion sealing with a pressure relief door, one end of the pressure relief door is hinged with the bottom plate through a hinge, one end, far away from the hinge, of the pressure relief door is directly or indirectly pressed against one end of a pressure relief spring, the other end of the pressure relief spring is directly or indirectly assembled with one end of a pressure relief bolt, the other end of the pressure relief bolt penetrates through a locking beam and is assembled with the locking beam, the locking beam is arranged on a pressure relief frame, and the pressure relief frame is arranged on the bottom plate; the bottom plate is provided with a penetrating bottom plate hole which is communicated with the pressure relief groove and is positioned on the inner side of the sealing strip; in the initial state, the pressure relief door is tightly pressed and sealed with the sealing strip.

Description

Pressure release module and explosion-proof high-low temperature damp-heat test box thereof

Technical Field

The utility model relates to a proof box especially relates to a pressure release module and explosion-proof type high low temperature damp and hot proof box thereof.

Background

The high-low temperature damp-heat test box is mainly used for carrying out high-low temperature damp-heat shock test on a sample, and in actual use, due to reasons such as impact, the conditions that the test sample explodes, the air pressure in the box is too high, and the box door is bounced open exist. The air current that rushes out at this moment probably damages equipment, causes the injury to staff on every side, and the piece that the explosion produced, the chamber door of popping open very easily strikes staff and equipment, therefore the potential safety hazard is bigger.

In the test process of the existing high-low temperature damp-heat test box, if the air pressure in the box rises and is not increased explosively, the explosion probability can be greatly reduced if the pressure can be released in time. During explosion, if the door is opened at a certain angle and is limited to be directly bounced, fragments and objects around the door can be effectively prevented from being impacted. However, at present, no similar design exists, and the pressure relief and explosion prevention design for the high-low temperature damp-heat test box is necessary, so that the explosion-proof type high-low temperature damp-heat test box is provided.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned defect of prior art, the utility model aims to solve the technical problem that a pressure release module and explosion-proof type high low temperature damp and hot test box is provided, the high pressure draught of incasement can in time be discharged to its pressure release module to reduce the probability of explosion and the impact force when exploding.

In order to achieve the purpose, the utility model provides a pressure relief module which is arranged on a box body, wherein the box body is also provided with a pressure relief groove and a test cavity, one end of the pressure relief groove is communicated with the test cavity, and the other end of the pressure relief groove penetrates through the box body; the pressure relief door is characterized by comprising a bottom plate, wherein the bottom plate is arranged on a box body, a sealing frame is arranged on the bottom plate, a sealing installation groove is formed in the sealing frame, the sealing installation groove is fixedly assembled with a sealing installation part of a sealing strip, the sealing strip is extruded and sealed with the pressure relief door, one end of the pressure relief door is hinged with the bottom plate through a hinge, one end, far away from the hinge, of the pressure relief door is directly or indirectly pressed against one end of a pressure relief spring, the other end of the pressure relief spring is directly or indirectly assembled with one end of a pressure relief bolt, the other end of the pressure relief bolt penetrates through a locking beam and is assembled with the locking beam, the locking beam is arranged on a pressure relief frame, and the pressure relief frame is arranged on the bottom plate; a penetrating bottom plate hole is formed in the bottom plate and communicated with the pressure relief groove, and the bottom plate hole is located on the inner side of the sealing strip; in an initial state, the pressure relief door is tightly pressed and sealed with the sealing strip to seal the pressure relief groove.

As the utility model discloses a further improvement, the one end that the hinge was kept away from to the pressure release door compresses tightly with the hold-down head, the one end assembly of hold-down head and pressure release spring, the other end and the spring cap assembly of pressure release spring, the one end assembly of spring cap and pressure release bolt.

As a further improvement of the utility model, the pressure relief device also comprises a pressure relief frame, wherein the two ends of the pressure relief frame are respectively assembled with the bottom plate and the protective net, and the protective net is provided with a through hole through which a plurality of parts run through.

As the utility model discloses a further improvement still includes interior sleeve pipe, interior sleeve pipe is installed in the pressure release inslot, is provided with pressure release channel on the interior sleeve pipe, pressure release channel, bottom plate hole, test cavity intercommunication.

As a further improvement of the utility model, two ends of the inner sleeve respectively penetrate out of the pressure relief groove, edge covering parts are respectively arranged at two ends of the inner sleeve, and the inner sleeve is clamped in the pressure relief groove through the edge covering at two ends; the edge covering part between the bottom plate and the box body is tightly pressed on the box body through the bottom plate.

As a further improvement, the pressing head, the pressure relief spring, the spring cover and the pressure relief bolt are two, the two pressure relief bolts are assembled with the extrusion plate, and the extrusion plate applies pressure to the two spring covers.

As a further improvement, the pressure relief door is provided with a sealing plate on the end face contacted with the sealing strip, and the sealing plate is extruded and sealed with the sealing strip.

As a further improvement of the utility model, still include the heater subassembly, the heater subassembly includes the heater, and the heater generates heat after the circular telegram, and the heater directly or indirectly transmits the heat to interior sleeve pipe and/or pressure release door on.

As a further improvement of the utility model, the heating wire component also comprises an upper shell and a lower shell, the upper shell is sleeved on the lower shell, and a screw passes through the upper shell and the lower shell and then is assembled with the bottom plate; a hollow heating cavity is arranged between the upper shell and the lower shell, and a heating wire is arranged in the heating cavity.

The utility model also discloses a high low temperature damp and heat test box of explosion-proof type, characterized by: the pressure relief module is applied.

The utility model has the advantages that:

the utility model discloses a pressure release module pushes away the pressure release door through certain atmospheric pressure and initiatively releases pressure, its simple structure, and the mode through initiative pressure release can effectively reduce the probability of explosion in the experimental storehouse, the intensity of explosion moreover to improve the security. In addition, the pressure relief module heats the pressure relief groove through the heating wire assembly, so that the influence of the pressure relief groove and the pressure relief module on the test bin is compensated, and the test accuracy is ensured.

The utility model discloses a mode of chain constraint chamber door, chamber door is directly washed out when can effectively preventing explosion in the experimental storehouse to reduce danger, utilize the mode that the chamber door can be opened by certain angle to distribute the high pressure draught in the experimental storehouse rapidly simultaneously, can prevent the expansion of explosion effectively. And after the chain adopts swing arm control, can control opening and shutting of swing arm and chamber door fast through the simple operation of handle to still guarantee explosion-proof barrier propterty when guaranteeing the convenience.

Drawings

FIG. 1 is a schematic structural diagram of the first embodiment;

FIG. 2 is a schematic structural diagram according to the first embodiment;

FIG. 3 is a cross-sectional view of the pressure relief module 200 at the center face of the inner bushing 230;

FIG. 4 is an enlarged view at A in FIG. 3;

FIGS. 5-8 are schematic views of the pressure relief module 200;

fig. 9-10 are exploded views of the pressure relief module 200;

11-12 are partial exploded views of the pressure relief module 200;

FIG. 13 is a schematic structural diagram according to the first embodiment;

FIG. 14 is a schematic structural diagram of an explosion-proof module according to one embodiment;

FIGS. 15 to 16 are schematic structural views of the second embodiment;

FIGS. 17 to 18 are schematic structural views of an explosion-proof module according to a second embodiment;

19-23 are partial structural schematic diagrams of an explosion-proof module in a second embodiment;

fig. 24 is a sectional view of the explosion-proof module of the second embodiment at the center plane of the axis of the handle shaft 470;

FIG. 25 is a sectional view of the explosion-proof module of the second embodiment taken along a central plane of the axis of the pulley shaft 460;

fig. 26 is a sectional view (partially) of the explosion proof module in the second embodiment at the center plane where the axis of the spring shaft 481 is located;

fig. 27 is a sectional view of the explosion proof module of the second embodiment taken along a central plane of the axis of the lock block 921;

FIG. 28 is a schematic view of a portion of the structure of the handle 710 and the belt housing 130;

fig. 29 is a partial structural view of the handle 710 and the handle shaft 470.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Example one

Referring to fig. 1 to 14, the explosion-proof high-low temperature thermal-humidity test chamber of the present embodiment includes a chamber 100, a pressure relief module 200, and an explosion-proof module, where the chamber 100 is provided with a test chamber 101, one side of the test chamber 101 is open, and an opening end of the test chamber is closed by a chamber door 110, the chamber door 110 is installed on the chamber 100, and the chamber door 110 is provided with a transparent observation window 111. Specifically, in the present embodiment, the door 110 is hinged to the cabinet 100 at one side, and detachably assembled to the cabinet 100 by a door lock at the other side, as in the prior art.

The box body 100 is further provided with a pressure relief groove 102, one end of the pressure relief groove 102 is communicated with the test cavity 101, and the other end of the pressure relief groove 102 penetrates through the box body 100. In this embodiment, the pressure-releasing groove 102 penetrates the top surface of the box 100, and the pressure-releasing module 200 is installed at the pressure-releasing groove 102.

The pressure relief module 200 comprises a pressure relief frame 210, a bottom plate 240 and an inner sleeve 230, wherein two ends of the pressure relief frame 210 are respectively assembled with the bottom plate 240 and a protective net 220, and the protective net 220 is provided with a plurality of through holes which penetrate through, so that the air flow can be discharged conveniently, and the pressure relief door 280 can be protected. The inner sleeve 230 is arranged in the pressure relief groove 102, two ends of the inner sleeve 230 respectively penetrate through the pressure relief groove 102, edge-covered parts 232 are respectively arranged at two ends of the inner sleeve 230, and the inner sleeve 230 is clamped in the pressure relief groove 102 (on the box body 100) through the edge-covered parts 232 at two ends; the inner sleeve 230 and the bottom plate 240 are respectively provided with a pressure relief channel 231 and a bottom plate hole 241, and the pressure relief channel 231, the bottom plate hole 241 and the test cavity 101 are communicated.

A base plate 240 is mounted on the housing 100 and a rim portion 232 between the base plate 240 and the housing 100 is pressed against the housing 100 by the base plate 240 to further secure the inner sleeve 230. The bottom plate 240 is further provided with a sealing frame 260, the sealing frame 260 is provided with a sealing installation groove 261, the sealing installation groove 261 is fixedly assembled with a sealing installation part 271 of a sealing strip 270, the sealing strip 270 is in extrusion sealing with a pressure relief door 280, one end of the pressure relief door 280 is hinged with the bottom plate 240 through a hinge 281, one end, far away from the hinge 281, of the pressure relief door 280 is tightly pressed with a pressing head 511, the pressing head 511 is assembled with one end of a pressure relief spring 510, the other end of the pressure relief spring 510 is assembled with a spring cover 512, the spring cover 512 is assembled with one end of a pressure relief bolt 410, the other end of the pressure relief bolt 410 penetrates through a locking beam 291 and is assembled with the locking beam 291 in a threaded manner, the locking beam 291 is arranged on a pressure relief frame 290, and the pressure relief frame 290 is installed on the bottom plate 240. When the pressure relief door 280 is used, the compression degree of the pressure relief spring 510 can be adjusted by adjusting the distance between the pressure relief bolt 410 and the bottom plate 240, so that the opening pressure of the pressure relief door 280 can be adjusted. When the air pressure in the test chamber 101 reaches the opening pressure of the pressure relief door 280, the pressure relief door 280 will be pushed open, and the pressure relief door 280 will rotate upward around the hinge 281 to be opened, so as to quickly exhaust the air pressure in the test chamber 101, thereby reducing the probability of explosion. During explosion, the air pressure directly pushes the pressure relief door to relieve pressure, so that the impact force of the explosion on the door of the box is reduced.

Preferably, there are two pressure heads 511, two pressure relief springs 510, two spring covers 512, and two pressure relief bolts 410, wherein the two pressure relief bolts 410 are assembled with the pressing plate 292, and the pressing plate 292 presses the two spring covers 512, so that the pressing forces exerted on the two pressure relief springs 510 are substantially the same, that is, the opening resistances exerted on the pressure relief door 280 by the two pressure heads 511 are the same. The design is mainly used for balancing the opening pressure of the pressure relief door and ensuring that the pressure relief door can be quickly opened under the preset air pressure.

Referring to fig. 3 to 4, a sealing plate 282 is preferably mounted on an end surface of the pressure relief door 280 contacting the sealing strip 270, and the sealing plate 282 is press-sealed with the sealing strip 270. The design mainly considers that the pressure relief door 280 and the sealing strip 270 need certain tightness, and the requirement on the flatness of the pressure relief door 280 can be effectively reduced through the compression sealing of the sealing plate 282 and the sealing strip 270, so that the cost is reduced, and the corresponding sealing performance is ensured.

Preferably, the box 100 is provided with the pressure relief groove 102, the pressure relief module 200 is mounted at the pressure relief groove 102, and then the original heat insulation structure of the box is greatly influenced, in order to prevent condensation and even frosting at the pressure relief groove 102 during a low-temperature test, a heating wire needs to be laid at the periphery of the pressure relief groove 102, and the working condition of the heating wire is the same as that of a door frame and a box frame of the test box, so that the part of the electric connection wire needs to be connected with the electric part of the test box. For this embodiment, a heating wire assembly 250 is further added, the heating wire assembly 250 includes an upper shell 251 and a lower shell 252, the upper shell 251 is sleeved on the lower shell 252, and screws penetrate through the upper shell 251 and the lower shell 252 and then are assembled with the bottom plate 240; a hollow heating cavity 253 is arranged between the upper shell 251 and the lower shell 252, and a heating wire is arranged in the heating cavity 253 and generates heat after being electrified. When the heating device is used, the heating wire is supplied with power according to needs, and the heating efficiency and the maximum heating temperature of the heating wire can be controlled by controlling the power supply parameters of the heating wire. Thereby eliminating or reducing the influence on the box body caused by the opening of the pressure relief hole 102 and the installation of the pressure relief module 200. The heat of the heating wire is transferred to the upper shell 251 and the lower shell 252, and then transferred to the bottom plate 240 and the inner sleeve 230, so that the pressure relief groove is effectively compensated, and the test accuracy is improved.

Referring to fig. 1-2 and 13-14, in order to prevent a certain potential safety hazard caused by the door 110 being opened due to untimely or rapid pressure relief by the pressure relief module during explosion, the embodiment further adds an explosion-proof module, where the explosion-proof module includes a plurality of chain support rings 330, a first chain 321, a second chain 322, a first lock rod 311, a second lock rod 312, and a third lock rod 313, the chain support rings 330 are respectively installed on three outer side surfaces of the box 100 and the outer side of the door 110, the first lock rods 311 are provided with two and respectively installed on two sides of the box 100, the second lock rods 312 are installed on the door 110, and the third lock rod 313 is installed on one side of the box away from the door; the first lock bar 311, the second lock bar 312 and the third lock bar 313 respectively slidably pass through the corresponding chain support ring 330, so that the first lock bar 311, the second lock bar 312 and the third lock bar 313 are movably assembled with the box body 100 and the box door 110; hanging rings 341 are respectively arranged at two ends of the first locking rod 311, the second locking rod 312 and the third locking rod 313, two ends of the first chain 321 are respectively assembled with the hanging ring 341 at one end of the first locking rod 311 and the hanging ring 341 at one end of the third locking rod 313, and two ends of the second chain 322 are respectively assembled with the hanging ring 341 at the other end of the first locking rod 311 and the hanging ring 341 at one end of the second locking rod 312; in the initial state, the second chain 322 and the first chain 321 are in an untensioned state.

In case explode in experimental bin 101, the impact force can push door 110 open, and can stretch second chain 322, first chain 321 when door 110 is opened, and the door reaches the biggest opening angle when second chain 322, first chain 321 tighten, and the door is not opened completely this moment, but can quick pressure release to can enough cushion the air current after the explosion, can prevent again that the impact force of explosion from directly opening the door, bring the piece out and cause the potential safety hazard. When the door is accidentally opened, the second chain 322 and the first chain 321 are tensioned, and the stress of the second chain 322 and the first chain 321 is relatively uniformly distributed to the front, back, left and right surfaces (especially the left and right corners of the back surface) of the box body, so that the impact force of explosion can be effectively resisted.

Preferably, a safety hook is further installed at one end of the second chain 322, and the safety hook can be manually opened to be separated from the corresponding hanging ring 341, so that the limitation on the box door can be removed, the box door can be completely opened, and the sample can not be influenced to enter and exit the test chamber.

Example two

In the first embodiment, the two second chains 322 of the explosion-proof module are quickly detached and installed through the safety hook, so that the limitation of the explosion-proof module on the door 110 is reduced as much as possible. However, the two safety hooks still need to be independently operated in the mode, so that the working procedures are increased, and the normal opening and closing of the box door can be influenced after the second chain is opened. Therefore, based on the current use habits and convenience, the explosion-proof module in the first embodiment is improved, so that the box door 110 can be opened and closed quickly without obviously increasing the necessity of the process, thereby not only maintaining the explosion-proof function, but also increasing the convenience and being more convenient to use.

Referring to fig. 15-29, in the explosion-proof module of this embodiment, one of the first lock levers 311 is replaced by a fourth lock lever 314, one of the second chains 322 is replaced by a third chain, an explosion-proof shell 610 is added, the explosion-proof shell 610 is mounted on the box body 100, the explosion-proof shell 610 is provided with a shaft seat 611, the shaft seat 611 and the arm shaft 430 can be assembled in a circumferential rotation manner, one end of the arm shaft 430 enters the explosion-proof shell 610 and is assembled with the arm shaft gear 820, the other end of the arm shaft 430 penetrates through the shaft seat 611 and is assembled with one end of the swing arm 620, the other end of the swing arm 620 is provided with a swing arm protrusion 621, one end of the swing arm 620 provided with the swing arm protrusion 621 is assembled with the engaging seat 120 in a clamping manner, the engaging seat 120 is mounted on the box door 110, the engaging seat 120 is provided with an engaging protrusion 121, the swing arm protrusion 621 is assembled with the engaging protrusion 121 in a clamping manner, one end of the swing arm 620 is assembled between the engaging seat 120 and the swing arm 620 cannot pass through the engaging seat 120 along the length direction (the direction perpendicular to the arm shaft 430 or the horizontal direction). This design is primarily intended to restrain the door by the swing arm 620 when the door is opened by an explosion.

A hanging ring 341 is mounted on the swing arm 620, the hanging ring 341 is assembled with one end of the third chain 323, the other end of the third chain 323 is assembled with the hanging ring 341 on one end of the fourth lock rod 314, and the fourth lock rod 314 passes through the pipe sleeve 420 and the corresponding chain supporting ring 330 and then is assembled with the corresponding first chain 321; the fourth locking bar 314 is slidably assembled with a pipe sleeve 420, and the pipe sleeve 420 is mounted on the explosion-proof housing 610. The engaging seat 120 and the second lock bar 312 can be assembled in an axial sliding manner, one end of the second lock bar 312 passes through the engaging seat 120 and then is assembled with the corresponding hanging ring 341, and the hanging ring 341 cannot pass through the engaging seat 120, so that the maximum moving displacement of the second lock bar 312 and the engaging seat 120 is limited.

Arm axle gear 820 and arm axle rack 810 mesh transmission, are provided with rack draw runner 811 on the arm axle rack 810, arm axle rack 810 and the assembly of direction spout 631 block, and direction spout 631 sets up on deflector 630, and deflector 630 is installed on explosion-proof shell 610.

The arm shaft gear 820, the arm shaft rack 810, the arm shaft 430, the swing arm 620, the clamping seat 120, the pipe sleeve 420, the third chain 323 and the fourth lock rod 314 form a swing arm mechanism, and the swing arm mechanism is provided with two swing arm mechanisms which are respectively arranged at the upper end and the lower end of the box door, so that the box door is better prevented from being explosion-proof and is not blocked by an observation window.

A rack plate 812 is further mounted on the arm shaft rack 810 of one of the swing arm mechanisms, the rack plate 812 is assembled or pressed with one end of the rack spring 520, the other end of the rack spring 520 is pressed or assembled with the stress plate 612, the stress plate 612 is mounted on the explosion-proof shell 610, and the rack spring 520 applies a thrust far away from the stress plate 612 to the rack plate 812, so that in an initial state, the arm shaft rack 810 is at one end far away from the stress plate 612, at this time, the arm shaft rack 810 drives the swing arm to be at a rotation angle far away from the engaging seat 120 (the swing arm rotates by 90 degrees in fig. 15), so that the box door 110 is not shielded, and the box door 110 can be normally opened and closed, which is an unlocking state of the swing arm.

Arm shaft racks 810 of the two swing arm mechanisms are further in meshing transmission with a first driving tooth 831 and a second driving tooth 832 respectively, the first driving tooth 831 and the second driving tooth 832 are in meshing transmission with each other, the first driving tooth 831 and the second driving tooth 832 are sleeved on a first gear shaft 440 and a second gear shaft 450 respectively, and the first gear shaft 440 and the second gear shaft 450 are installed on an explosion-proof shell 610 respectively. In this embodiment, the axial length of the second driving tooth 832 is greater than the axial length of the first driving tooth 831, so that the second driving tooth 832 is simultaneously in meshing transmission with the first driving tooth 831 and the corresponding arm shaft rack 810. One end of the arm shaft rack 810 close to the first driving tooth 831 and one end of the second driving tooth 832 are provided with a section of non-toothed section 813, and the non-toothed section 813 is not provided with clamping teeth, so that in the maximum displacement range of the arm shaft rack 810 in use, the second driving tooth 832 cannot be meshed with the arm shaft rack 810 corresponding to the first driving tooth 831, and interference and clamping are prevented.

The first driving teeth 831 and the second driving teeth 832 are designed to enable the two arm shaft racks 810 to synchronously move away from or close to each other, so as to drive the two swing arms to synchronously rotate towards the corresponding engaging seats 120 or synchronously rotate away from the corresponding engaging seats 120.

One end of the first gear shaft 440 penetrates through the explosion-proof housing 610 and then is assembled with a bevel gear 840, the bevel gear 840 is installed in a taper hole 851 and is in meshing transmission with a latch on the inner wall of the taper hole 851, the taper hole 851 is arranged on a taper sleeve 850, the taper sleeve 850 is sleeved on a pulley shaft 460 in an axially sliding and non-circumferential rotating manner, the pulley shaft 460 is installed on the transmission housing 140 and the belt housing 130, and the transmission housing 140 and the belt housing 130 are respectively installed on the box door 110. The transmission shell 140 is provided with a transmission hole 141, the taper sleeve 850 is axially slidably and circumferentially rotatably mounted in the transmission hole 141, a taper sleeve spring 530 is mounted between the taper sleeve 850 and the closed end of the transmission hole 141, and the taper sleeve spring 530 applies a thrust force far away from the transmission hole 141 to the taper sleeve 850; the taper sleeve 850 is provided with an annular groove 852, and the limit bolt 910 enters the annular groove 852 after passing through the transmission shell 140, so that the maximum displacement of the taper sleeve 850 in the axial direction is limited.

The belt wheel shaft 460 is sleeved with a belt wheel 861 on the part of the belt shell 130, the belt wheel 861 is connected with another belt wheel 861 through a synchronous belt 860 to form a belt transmission mechanism, the other belt wheel 861 is sleeved on a handle shaft 470, one end of the handle shaft 470 is assembled with the belt shell 130, the other end of the handle shaft 470 penetrates through the shaft sleeve 150 and then is assembled with one end of the handle 710, the shaft sleeve 150 is installed on the belt shell 130, the handle 710 can drive the handle shaft 470 to rotate synchronously when rotating, so that the belt wheel shaft 460 is driven to rotate, the belt wheel shaft 460 drives the first gear shaft 440 to rotate, and then the two arm shaft racks 810 are driven to move, so that the two swing arms 620 are driven to rotate.

Preferably, the shaft sleeve 150 is provided with a notch 151, a stopper 471 is installed at a position of the handle shaft 470 corresponding to the notch 151, the stopper 471 can rotate in the notch 151, and the notch 151 limits a maximum rotation angle of the stopper 471. This design mainly limits the rotation angle of the handle shaft 470, thereby limiting the rotation angle of the swing arm 620, so as to prevent the swing arm 620 from rotating too much or too little to hinder the opening and closing of the door.

Preferably, still include locking piece 920, be provided with locking pole 922, locking piece 921 on the locking piece 920 respectively, locking pole 922, locking piece 921 respectively with belt shell 130 block and slidable assembly, the one end of locking piece 921 is worn out belt shell 130 back and is compressed tightly with the stopper 471 that is in the locking state to make stopper 471, handle shaft 470 unable rotation, in order to keep the locking state to the swing arm.

The locking piece 920 is assembled with one end of the sleeve 482, the sleeve 482 is axially slidably sleeved on the spring shaft 481, the spring shaft 481 is installed on the belt shell 130, the sleeve 482 and the spring shaft 481 are further sleeved with a locking spring 550, and the locking spring 550 is used for applying pushing force to the locking piece 920, away from the spring shaft 481, so that the locking block 921 is kept clamped on the limit block 471 (the state of fig. 27).

The end of the locking rod 922 is pressed against the end of the end face shaft seat 870, the end face bearing 870 is axially slidably sleeved on the shaft sleeve 150, the shaft sleeve 150 is further provided with a spring ring 152, a switch spring 540 is further sleeved on a portion of the shaft sleeve 150 located between the spring ring 152 and the end face bearing 870, and the switch spring 540 applies an elastic force to the end face bearing 870 to block the end face bearing 870 from moving towards the spring ring 152, so that the end face bearing cannot push the locking rod 922 to move towards the belt shell 130 in an initial state.

The end face bearing 870 is also assembled with one end of the push shaft 730, the other end of the push shaft 730 passes through the handle 710 and then is assembled with the push knob 720, and the push shaft 730 is axially assembled with the handle 710 in a sliding manner.

Fig. 27 and fig. 15 show the locking state of the swing arm 620 to the door 110, at this time, if an explosion occurs in the sample chamber 101, the door 110 will be opened by air pressure, and when the door is opened, the swing arm 620 is driven to disengage from the inner cylinder arm shaft 430, and then the third chain 323, the first chain 321, and the second chain 322 are respectively tightened to limit the maximum opening angle of the door, thereby achieving the effects of explosion prevention and safety improvement.

When the door needs to be opened, the push button 720 is pressed, the push button 720 drives the end face bearing 870 to extrude the switch spring 540, so that the end face bearing 870 pushes the locking rod 922 to extrude the locking spring 550 until the locking block 921 is separated from the limiting block 471, the handle 710 is rotated to the maximum angle at the moment, and the handle 710 drives the two swing arms 620 to move away from each other and rotate to the maximum rotation angle so as to leave the door. Release and push away the knot, push away the knot and reset under switch spring's effect, and stopper 471 and locking piece 921 separation this moment, locking piece 921 stretches out to scarce groove 151 under locking spring 550's effect and resets to hinder stopper 471's antiport, thereby keep handle 710 in the open mode. Then the door is opened, after the door is opened, the bevel gear 840 is separated from the taper hole 851, and at this time, the rack spring 520 maintains the swing arm 620 in an open state. When the box is needed to be used, the box door is closed, so that the bevel gear 840 is installed in the taper hole 851 and is in meshing transmission with the taper hole; then, the swing arm 620 returns to the snap-fit assembly with the snap seat 120 by rotating the handle 710 to return, i.e. the locked state.

Preferably, the limiting block 471 is further provided with a limiting inclined surface 472, and when the limiting block 471 is switched from the open state to the locking state, the handle 710 is directly rotated, so that the limiting inclined surface 472 is extruded with the end of the locking block 921, and finally the locking block 921 is pushed away, so that the limiting block 471 is rotated to the state shown in fig. 27, and the locking block 921 is reset. This design is primarily for convenience of use and provides damping to the rotation of the handle 710 to prevent the arm shaft rack from driving the handle 710 backwards under the action of the rack spring 520. The limiting block 471 can be driven to penetrate through the locking block 921 by a slightly large force, so that the use is greatly facilitated.

In this embodiment, a mechanical door lock is used between the door 110 and the box 100, and the handle shaft 470 can be connected to the mechanical door lock (coaxially assembled with the door lock shaft), so that the swing arm 620 and the mechanical door lock can be operated by operating the handle 710 at the same time, thereby greatly facilitating the use, providing the same convenience as the prior art, but increasing the explosion-proof function.

The details of the present invention are well known to those skilled in the art.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims (10)

1. The pressure relief module is arranged on a box body, a pressure relief groove and a test cavity are further arranged on the box body, one end of the pressure relief groove is communicated with the test cavity, and the other end of the pressure relief groove penetrates through the box body; the method is characterized in that: the pressure relief door is characterized by comprising a bottom plate, wherein the bottom plate is arranged on a box body, a sealing frame is arranged on the bottom plate, a sealing installation groove is formed in the sealing frame, the sealing installation groove is fixedly assembled with a sealing installation part of a sealing strip, the sealing strip is extruded and sealed with the pressure relief door, one end of the pressure relief door is hinged with the bottom plate through a hinge, one end, far away from the hinge, of the pressure relief door is directly or indirectly pressed against one end of a pressure relief spring, the other end of the pressure relief spring is directly or indirectly assembled with one end of a pressure relief bolt, the other end of the pressure relief bolt penetrates through a locking beam and is assembled with the locking beam, the locking beam is arranged on a pressure relief frame, and the pressure relief frame is arranged on the bottom plate; the bottom plate is provided with a penetrating bottom plate hole which is communicated with the pressure relief groove and is positioned on the inner side of the sealing strip; in an initial state, the pressure relief door is tightly pressed and sealed with the sealing strip to seal the pressure relief groove.

2. The pressure relief module of claim 1, wherein: one end, far away from the hinge, of the pressure relief door is tightly pressed with the pressing head, the pressing head is assembled with one end of the pressure relief spring, the other end of the pressure relief spring is assembled with the spring cover, and the spring cover is assembled with one end of the pressure relief bolt.

3. The pressure relief module of claim 1, wherein: the pressure relief device is characterized by further comprising a pressure relief frame, wherein two ends of the pressure relief frame are respectively assembled with the bottom plate and the protective net, and a plurality of through holes penetrating through the protective net are formed in the protective net.

4. The pressure relief module of claim 1, wherein: still include interior sleeve pipe, interior sleeve pipe is installed in the pressure release groove, is provided with the pressure release passageway on the interior sleeve pipe, pressure release passageway, bottom plate hole, test cavity intercommunication.

5. The pressure relief module of claim 4, wherein: two ends of the inner sleeve respectively penetrate out of the pressure relief groove, edge covering parts are respectively arranged at two ends of the inner sleeve, and the inner sleeve is clamped in the pressure relief groove through the edge covering at two ends; the edge covering part between the bottom plate and the box body is tightly pressed on the box body through the bottom plate.

6. The pressure relief module of claim 2, wherein: the pressing head, the pressure relief spring, the spring cover and the pressure relief bolt are two, the two pressure relief bolts are assembled with the extrusion plate, and the extrusion plate applies pressure to the two spring covers.

7. The pressure relief module of claim 1, wherein: and a sealing plate is arranged on the contact end face of the pressure relief door and the sealing strip, and the sealing plate and the sealing strip are extruded and sealed.

8. The pressure relief module of any of claims 1-7, wherein: still include the heater subassembly, the heater subassembly includes the heater, and the heater generates heat after the power-on, and the heater directly or indirectly transmits the heat to interior sleeve pipe and/or on the pressure release door.

9. The pressure relief module of claim 8, wherein: the heating wire component also comprises an upper shell and a lower shell, the upper shell is sleeved on the lower shell, and a screw penetrates through the upper shell and the lower shell and then is assembled with the bottom plate; a hollow heating cavity is arranged between the upper shell and the lower shell, and a heating wire is arranged in the heating cavity.

10. An explosion-proof type high low temperature damp heat test case, characterized by: use of a pressure relief module according to any of claims 1-9.

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