CN116614906B - Heating equipment for air tightness test and heating method thereof - Google Patents
Heating equipment for air tightness test and heating method thereof Download PDFInfo
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- CN116614906B CN116614906B CN202310895015.8A CN202310895015A CN116614906B CN 116614906 B CN116614906 B CN 116614906B CN 202310895015 A CN202310895015 A CN 202310895015A CN 116614906 B CN116614906 B CN 116614906B
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 145
- 238000012360 testing method Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims description 10
- 230000007704 transition Effects 0.000 claims abstract description 47
- 210000001503 joint Anatomy 0.000 claims abstract description 43
- 238000007789 sealing Methods 0.000 claims abstract description 25
- 238000005485 electric heating Methods 0.000 claims abstract description 10
- 238000007664 blowing Methods 0.000 claims abstract description 9
- 238000009792 diffusion process Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 description 9
- 238000003756 stirring Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000013100 final test Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/02—Details
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
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- General Physics & Mathematics (AREA)
- Devices For Use In Laboratory Experiments (AREA)
Abstract
The invention relates to the field of heating equipment, in particular to heating equipment for air tightness test, which comprises a heating box, wherein a multidirectional electric heating structure is arranged in the heating box, a sealing door is installed on the heating box in a lifting manner through a vertical guide frame, the sealing door is driven through a hydraulic seat, a guide rail is fixedly connected to the heating box, a placing frame is movably installed on the guide rail, a transition box is arranged in the heating box, a drainage tube is arranged at the top of the transition box, an exhaust fan is arranged at a port of the drainage tube, a butt joint pipe is arranged on the side surface of the transition box, a bottom box is arranged at the bottom of the placing frame, a connecting pipe and an upper blowing port are arranged on the bottom box, a return pipe is fixedly installed on the bottom box, the ports of the return pipe and the drainage tube are oppositely arranged, an active sealing structure is arranged on the transition box and the butt joint pipe, a push rod is arranged on the placing frame, and a hanging strip is detachably installed on the push rod; the invention can achieve the purpose of uniformly heating the shell and avoiding inaccurate air tightness detection.
Description
Technical Field
The invention relates to the technical field of heating equipment, in particular to heating equipment for air tightness test and a heating method thereof.
Background
In the manufacture and assembly of certain products, in particular products involving sealing, gas tightness or pressure resistance, it is of paramount importance to conduct the gas tightness test. The air tightness test is used to detect whether the casing of the product has sufficient tightness to prevent leakage of gas or liquid.
The use environment of the motor is variable, wherein the temperature is the factor that affects the air tightness of the motor shell the greatest, because the motor shell can be exposed to high temperature or low temperature environment, resulting in thermal expansion and contraction of materials, thereby affecting the air tightness of the motor. Therefore, before the air tightness detection of the motor shell, the motor shell is usually put into heating equipment to be heated to 160-180 ℃, is insulated for two hours, is taken out to be cooled to about 50 ℃ at room temperature, and then is subjected to the air tightness detection.
Therefore, the heating device of the motor casing has decisive significance for the final air tightness detection result, at present, a plurality of motor casings are placed in the heating chamber, a high-temperature environment is directly built in the heating chamber through a heating structure surrounding the outer part of the motor casing, a radiation type heating mode is adopted, the outer heater cannot uniformly heat different parts of the motor casing, temperature gradients and uneven expansion are caused, and the final test result is inaccurate.
Disclosure of Invention
The invention aims to provide heating equipment and a heating method for air tightness test, so as to achieve the purposes of uniformly heating a shell and avoiding inaccurate air tightness detection, and solve the problems in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a heating equipment of gas tightness test, includes the heating cabinet, be provided with multidirectional electrical heating structure in the heating cabinet, and install the sealed door through erecting the leading truck lift on the heating cabinet, the sealed door drives through the hydraulic pressure seat, and fixedly connected with guide rail on the heating cabinet, and movable mounting puts the frame on the guide rail, be provided with the transition box in the heating cabinet, and the transition box top is provided with the drainage tube, drainage tube port department is provided with the exhaust fan, and the side of transition box is provided with the butt joint pipe, the bottom of putting the frame is provided with the base case, and is provided with connecting pipe and last mouthpiece on the base case, fixed mounting has the loopback pipe on the base case, and the port of loopback pipe and drainage tube sets up relatively, be provided with initiative seal structure on transition box and the butt joint pipe, be provided with the ejector pin on the frame, and detachably install the suspender that can the adjustment position on the ejector pin, and the suspender is located the clearance of putting the frame.
Preferably, the multidirectional electric heating structure comprises an upper heater arranged at the top of the heating box and a side heater arranged on the side wall of the heating box, wherein the upper heater and the side heater are both electric heaters, the vertical guide frame is arranged on two sides of the heating box, and the sealing door is positioned at the opening of the heating box.
Preferably, the guide rail is horizontally connected to the opening side of the heating box, the bottom of the placing frame is provided with casters, the placing frame is arranged on the guide rail through the casters, and at least three placing layers are arranged in the placing frame.
Preferably, the transition box is installed in the bottom of heating cabinet, and the drainage tube is vertical to be set up, the top of drainage tube is diffusion formula opening, and the exhaust fan is located this open position, the exhaust fan sets up towards upper heater.
Preferably, the butt joint pipe and the connecting pipe are both horizontally arranged, external threads are arranged on the butt joint pipe and the connecting pipe, and two groups of butt joint pipes and two groups of connecting pipes are correspondingly arranged.
Preferably, the connecting pipe is installed in the side of base box, and go up the top surface of mouthpiece range setting at the base box, go up the mouthpiece and set up towards the layer of putting the frame, and return the vertical setting of pipe, the top of returning the pipe is diffusion type opening, be provided with the air cavity in the base box, and connecting pipe, last mouthpiece and return the air cavity intercommunication of pipe all with the base box.
Preferably, the initiative seal structure is including setting up the screw sleeve on the butt joint pipe, and be provided with the internal thread on the screw sleeve, be provided with the outer floor on the screw sleeve's the outer wall, rotate on the transition box and install the pivot, and fixed mounting has a drive wheel and gear in the pivot, be provided with on the drive wheel and push away the tooth, and push away tooth and outer floor contact connection.
Preferably, the initiative seal structure is still including setting up the guide holder on the transition box, and is provided with the spring guide arm on the guide holder, fixedly connected with crane on the spring guide arm, and the crane passes through electric push rod control, fixedly connected with rack on the crane, and rack and gear engagement, the diameter of pushing the round is at least twice of gear.
Preferably, the ejector rod is horizontally arranged, a socket is assembled on the ejector rod, the socket is a rod piece with a slot in the middle, the socket is connected with the ejector rod through clamping pieces on two sides, an insert is assembled in the slot of the socket, and a hanging strip is arranged at the bottom of the insert.
A heating method of an airtight test heating apparatus, the heating method comprising the steps of:
s1: opening a sealing door on the heating box, moving a placing frame to the outside of the heating box by virtue of a guide rail, uniformly placing the machine shell, and simultaneously arranging hanging strips on the placing frame according to the placing position to enable the hanging strips to be positioned in gaps of the machine shell, and then sending the placing frame into the heating box to close the sealing door;
s2, when the placing frame enters the heating box, the bottom box is communicated with the transition box through the connection of the connecting pipe and the butt joint pipe, and the connecting pipe and the butt joint pipe are connected together in a sealing mode through an active sealing structure;
s3: the direct heating is carried out from the top and the side of the machine shell through the multidirectional electric heating structure, meanwhile, the carrying of gas is carried out through the drainage tube with the exhaust fan, so that hot air flow close to the upper heater enters the drainage tube, then enters the bottom box through the transition box, a part of the hot air flow is diffused from the upper blowing opening at the top of the bottom box and is directly blown to the bottom of the machine shell, another part of the hot air flow in the bottom box enters the pipe, and the hot air flow is blown from the end part of the return pipe to the position of the drainage tube, so that hot air flow circulation is formed.
Compared with the prior art, the invention has the beneficial effects that:
1. the main body of the heating equipment is the heating box, the upper heater and the side heater can be used as main heating structures to heat air in the heating cavity, meanwhile, the transition box is arranged in the heating box, and the air in the heating cavity can be circulated according to the designed direction by carrying the air through the drainage tube with the exhaust fan, so that hot air circulation is formed, the temperature difference of the parts of the machine shell is avoided, the air tightness detection result is influenced, the bottom box which can be communicated with the transition box is arranged at the bottom of the placing frame, hot air can be conveyed from the bottom of the machine shell through the bottom box, and the effect of uniformly heating the bottom of the machine shell is achieved.
2. According to the invention, the butt joint pipe is arranged on the transition box, the connecting pipe is arranged on the bottom box, and when the placing frame is sent into the heating box, the butt joint pipe can be connected with the connecting pipe, so that the bottom box is communicated with the transition box, the connection between the butt joint pipe and the connecting pipe is completed through the active sealing structure, and the hot air flow in the transition box is prevented from escaping, so that the hot air flow can flow according to expectations.
3. According to the invention, the ejector rod is arranged at the top of the placement frame, the socket can be arranged at any position on the ejector rod, the plug-in unit can be arranged at any position of the socket, so that the hanging strip is arranged in the gap of the shell as required, and when the upper blowing opening generates air flow, the hanging strip can move to play a role in stirring hot air flow, and further the heating effect is more uniform.
Drawings
Fig. 1 is a first schematic view of the overall structure of the present invention.
Fig. 2 is a second schematic view of the overall structure of the present invention.
Fig. 3 is a schematic view showing an opened state of the heating cabinet of the present invention.
Fig. 4 is a schematic view showing the bottom structure of the heating tank of the present invention.
FIG. 5 is a schematic view of the structure of the drainage tube of the present invention.
Fig. 6 is a schematic view of an active sealing structure according to the present invention.
Fig. 7 is a schematic view of the structure of the placement frame and the guide rail of the present invention.
Fig. 8 is a first schematic view of the structure of the placement frame of the present invention.
Fig. 9 is a second schematic view of the structure of the placement frame of the present invention.
FIG. 10 is a schematic view of the strap configuration of the present invention.
In the figure: the heating box 1, the upper heater 2, the side heater 3, the vertical guide frame 4, the sealing door 5, the hydraulic seat 6, the guide rail 7, the placing frame 8, the transition box 9, the drainage tube 10, the exhaust fan 11, the butt joint tube 12, the bottom box 13, the connecting tube 14, the upper blowing opening 15, the return pipe 16, the threaded sleeve 17, the outer rib plate 18, the rotating shaft 19, the pushing wheel 20, the pushing teeth 21, the guide seat 22, the spring guide rod 23, the lifting frame 24, the rack 25, the gear 26, the ejector rod 27, the socket 28, the clamping piece 29, the plug-in unit 30 and the hanging strip 31.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and detailed description, wherein it is to be understood that, under the precondition of no conflict, new embodiments can be formed by any combination of the embodiments or technical features described below, and it should be understood that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 to 10, the present invention provides a technical solution: the utility model provides a heating equipment of gas tightness test, including heating cabinet 1, be provided with multidirectional electrical heating structure in the heating cabinet 1, and install sealed door 5 through erecting guide frame 4 lift on the heating cabinet 1, sealed door 5 is driven through hydraulic pressure seat 6, and fixedly connected with guide rail 7 on the heating cabinet 1, and movable mounting has on the guide rail 7 and put the frame 8, be provided with transition box 9 in the heating cabinet 1, and transition box 9 top is provided with drainage tube 10, drainage tube 10 port department is provided with induced draft fan 11, and the side of transition box 9 is provided with butt joint pipe 12, the bottom of putting the frame 8 is provided with the base box 13, and be provided with connecting pipe 14 and last mouthpiece 15 on the base box 13, fixed mounting has loopback pipe 16 on the base box 13, and loopback pipe 16 and drainage tube 10's port set up relatively, be provided with initiative seal structure on transition box 9 and the butt joint pipe 12, be provided with ejector pin 27 on putting the frame 8, and detachably install 31 that can adjust the position on the ejector pin 27, and suspender 31 is located the clearance of putting the frame 8.
The multidirectional electric heating structure comprises an upper heater 2 arranged at the top of a heating box 1, and a side heater 3 arranged on the side wall, wherein the upper heater 2 and the side heater 3 are electric heaters, a vertical guide frame 4 is arranged on two sides of the heating box 1, and a sealing door 5 is positioned at the opening of the heating box 1.
The main body of the heating equipment is a heating box 1, one side of the heating box 1 is provided with an open structure, the machine shell to be heated can be moved in and out, after the machine shell is fed into the heating box 1, a hydraulic seat 6 can control a closing door 5 to be closed, a closed heating cavity is formed in the heating box 1, and the upper heater 2 and the side heater 3 are used as main heating structures to heat air in the heating cavity.
The guide rail 7 is horizontally connected to the opening side of the heating box 1, casters are arranged at the bottom of the placement frame 8, the placement frame 8 is installed on the guide rail 7 through the casters, and at least three placement layers are arranged in the placement frame 8.
The side surface of the heating box 1 is provided with the guide rail 7, so that the setting of the setting frame 8 can be carried out, the setting of the machine shell and the entering and exiting of the machine shell in the heating box 1 are facilitated, the machine shell is firstly uniformly set on the setting frame 8 outside the heating box 1, then the setting frame 8 is pushed into the heating box 1 through the guide rail 7 for heating, in general, the machine shell is of a cylindrical structure, the flat end surface of the machine shell is taken as the bottom surface to be vertically set on the setting frame 8, the machine shells are arranged on the setting frame 8 in an equidistant mode, gaps with the same size are formed among the machine shells, and the uniform heat transfer of hot air flow is ensured.
The transition box 9 is installed in the bottom of heating cabinet 1, and the vertical setting of drainage tube 10, and the top of drainage tube 10 is diffusion formula opening, and exhaust fan 11 is located this open position, and exhaust fan 11 sets up towards upper heater 2.
In the invention, the multidirectional electric heating structure is adopted to directly heat the shell, the transition box 9 is arranged in the heating box 1, and the air can be conveyed through the drainage tube 10 with the exhaust fan 11, so that the air in the heating cavity can circulate according to the designed direction, and the influence of different temperatures of the parts of the shell on the detection result of air tightness is avoided.
The butt joint pipe 12 and the connecting pipe 14 are both horizontally arranged, external threads are arranged on the butt joint pipe 12 and the connecting pipe 14, and two groups of the butt joint pipe 12 and the connecting pipe 14 are correspondingly arranged.
The bottom box 13 is installed to the bottom of putting the frame 8, can carry the hot air flow from the bottom of casing through the bottom box 13, and then reaches the effect of even heating casing bottom, is provided with butt joint pipe 12 on transition box 9, and is provided with connecting pipe 14 on the bottom box 13, when putting the frame 8 into heating cabinet 1, butt joint pipe 12 can be connected with connecting pipe 14, and then makes bottom box 13 and transition box 9 intercommunication.
The connecting pipe 14 is installed in the side of the base box 13, and go up the top surface that the mouthpiece 15 arranged and set up at the base box 13, go up the mouthpiece 15 and put the layer of putting of frame 8 and set up vertically, and return pipe 16, the top of returning pipe 16 is the diffusion type opening, be provided with the air cavity in the base box 13, and connecting pipe 14, last mouthpiece 15 and return pipe 16 all communicate with the air cavity of base box 13.
The draft fan 11 is used for generating air flow, so that hot air flow close to the upper heater 2 enters the draft tube 10, then enters the bottom box 13 through the transition box 9, and part of the hot air flow is diffused from the upper blowing opening 15 at the top of the bottom box 13 and directly blown to the bottom of the machine shell, the multidirectional electric heating structure is matched for completing the omnibearing uniform heating of the machine shell, the local overheating of the machine shell is avoided, and the other part of the air flow in the bottom box 13 can enter the return pipe 16 and is blown from the end part of the return pipe 16 to the position of the draft tube 10, so that the circulation of the hot air flow is promoted, and the temperature of the whole heating cavity is more uniform.
The driving sealing structure comprises a threaded sleeve 17 arranged on a butt joint pipe 12, an internal thread is arranged on the threaded sleeve 17, an outer rib plate 18 is arranged on the outer wall of the threaded sleeve 17, a rotating shaft 19 is rotatably arranged on a transition box 9, a driving wheel 20 and a gear 26 are fixedly arranged on the rotating shaft 19, a driving tooth 21 is arranged on the driving wheel 20, and the driving tooth 21 is in contact connection with the outer rib plate 18.
The connection between the butt joint pipe 12 and the connecting pipe 14 is completed through an active sealing structure, so that the hot air flow in the transition box 9 is prevented from escaping, and the hot air flow can flow according to the expected condition.
The active sealing structure further comprises a guide seat 22 arranged on the transition box 9, a spring guide rod 23 is arranged on the guide seat 22, a lifting frame 24 is fixedly connected to the spring guide rod 23, the lifting frame 24 is controlled by an electric push rod, a rack 25 is fixedly connected to the lifting frame 24, the rack 25 is meshed with a gear 26, and the diameter of the pushing wheel 20 is at least twice that of the gear 26.
After the butt joint pipe 12 and the port of the connecting pipe 14 are in butt joint, the electric push rod can drive the lifting frame 24 to move downwards against the elasticity of the spring, the rack 25 on the lifting frame 24 is used for driving the gear 26 to rotate, the gear 26 and the pushing wheel 20 are coaxially connected on the rotating shaft 19, the diameter of the pushing wheel 20 is at least twice as large as that of the gear 26, the pushing wheel 20 can rotate along with the gear 26, the larger linear speed is achieved, an accelerating effect can be achieved, the pushing teeth 21 on the pushing wheel 20 are in contact with the outer rib plates 18, the threaded sleeve 17 is quickly driven to rotate, the threaded sleeve 17 rotates from the butt joint pipe 12 to the connecting pipe 14, and then sealing butt joint of the two is completed, otherwise, when the lifting frame 24 moves upwards, the threaded sleeve 17 is separated from the connecting pipe 14, and the placing frame 8 can be separated from the heating box 1.
The ejector rod 27 is horizontally arranged, the ejector rod 27 is provided with a socket 28, the socket 28 is a rod piece with a slot in the middle, the socket 28 is connected with the ejector rod 27 through clamping pieces 29 on two sides, an insert 30 is arranged in the slot of the socket 28, and the bottom of the insert 30 is provided with a hanging strip 31.
Meanwhile, the top of the placing frame 8 is provided with the ejector rod 27, the socket 28 can be arranged at any position on the ejector rod 27, the plug-in 30 can also be arranged at any position of the socket 28, the hanging strip 31 is arranged, the hanging strip 31 can be just arranged in a gap of the shell according to requirements, and when the upper blowing opening 15 generates air flow, the hanging strip 31 can move to play a role in stirring hot air flow, and further the heating effect is more uniform.
In the case of equidistant arrangement of the motor housing, the arrangement of the slings 31 can be made more convenient so that they lie in the slots of the motor housing.
A heating method of an airtight test heating apparatus, the heating method comprising the steps of:
s1: opening a closed door 5 on the heating box 1, moving a placing frame 8 to the outside of the heating box 1 by virtue of a guide rail 7, uniformly placing a shell, and simultaneously arranging a hanging strip 31 on the placing frame 8 according to the placing position, so that the hanging strip 31 is positioned in a gap of the shell, and then sending the placing frame 8 into the heating box 1 to close the closed door 5;
s2, when the placing frame 8 enters the heating box 1, the bottom box 13 is communicated with the transition box 9 through the connection of the connecting pipe 14 and the butt joint pipe 12, and the connecting pipe 14 and the butt joint pipe 12 are connected together in a sealing mode by utilizing an active sealing structure;
s3: the direct heating is carried out from the top and the side of the machine shell through the multidirectional electric heating structure, meanwhile, the carrying of the air is carried out through the drainage tube 10 with the exhaust fan 11, so that the hot air flow near the upper heater 2 enters into the drainage tube 10, then enters into the bottom box 13 through the transition box 9, and is diffused from the upper blowing opening 15 at the top of the bottom box 13, is directly blown to the bottom of the machine shell, and the other part of the air flow in the bottom box 13 enters into the return pipe 16, is blown from the end part of the return pipe 16 to the position of the drainage tube 10, so that the hot air flow circulation is formed.
The invention is used when in use: firstly, the main body of the heating equipment is a heating box 1, one side of the heating box 1 is provided with an open structure, so that the machine shell to be heated can be put in and out, after the machine shell is fed into the heating box 1, a hydraulic seat 6 can control a closed door 5 to be closed, and then a closed heating cavity is formed in the heating box 1, and the upper heater 2 and the side heater 3 are used as main heating structures to heat air in the heating cavity, the guide rail 7 is arranged on the side surface of the heating box 1, the placement frame 8 can be arranged, thereby facilitating the placement of the machine shell and the machine shell to be put in and out in the heating box 1, the machine shell is placed on the placement frame 8 uniformly, and then the placement frame 8 is pushed into the heating box 1 through the guide rail 7 to heat, the transition box 9 is also arranged in the heating box 1, the transportation of gas can be carried out through the drainage tube 10 with the exhaust fan 11, so that the air in the heating cavity can circulate according to the designed direction, the temperature difference of the whole machine shell is avoided, the air tightness detection result is influenced, the bottom of the placement frame 8 is provided with the bottom box 13, the hot air flow can be conveyed from the bottom of the machine shell through the bottom box 13, the effect of uniformly heating the bottom of the machine shell is further achieved, the transition box 9 is provided with the butt joint tube 12, the bottom box 13 is provided with the connecting tube 14, when the placement frame 8 is sent into the heating box 1, the butt joint tube 12 can be connected with the connecting tube 14, the bottom box 13 is further communicated with the transition box 9, the air flow is generated through the exhaust fan 11, the hot air flow close to the upper heater 2 enters the drainage tube 10, and then enters the bottom box 13 through the transition box 9, part of the air flow is diffused from the upper blowing opening 15 at the top of the bottom box 13 and is directly blown to the bottom of the machine shell, the multidirectional electric heating structure is matched to complete the omnibearing uniform heating of the machine shell, the local overheating of the machine shell is avoided, the other part of the air flow in the bottom box 13 can enter the return pipe 16 and is blown from the end part of the return pipe 16 to the position of the drainage pipe 10, the circulation of the hot air flow is promoted, the temperature of the whole heating cavity is more uniform, the connection of the butt joint pipe 12 and the connecting pipe 14 is completed through the active sealing structure, the hot air flow in the transition box 9 is prevented from being dissipated, the hot air flow can flow according to expectations, after the butt joint pipe 12 and the port of the connecting pipe 14 are butted together, the lifting frame 24 can be driven by the electric push rod to move downwards against the elasticity of the spring, the gear 26 is driven to rotate by the rack 25 on the lifting frame 24, the gear 26 and the pushing wheel 20 are coaxially connected on the rotating shaft 19, the diameter of the pushing wheel 20 is at least twice of that of the gear 26, the pushing wheel 20 can rotate along with the gear 26, and has a larger linear speed, so that an acceleration effect can be achieved, the pushing teeth 21 on the pushing wheel 20 are in contact with the outer rib plates 18, the threaded sleeve 17 is quickly driven to rotate, the threaded sleeve 17 rotates from the butt joint pipe 12 to the connecting pipe 14, and further sealing butt joint of the two is completed, conversely, when the lifting frame 24 moves upwards, the threaded sleeve 17 is separated from the connecting pipe 14, the placing frame 8 can be separated from the heating box 1, meanwhile, the top of the placing frame 8 is provided with the ejector rod 27, a socket 28 can be arranged at any position on the ejector rod 27, the plug-in 30 can also be arranged at any position of the socket 28, further the hanging strip 31 is arranged, the hanging strip 31 can be just arranged in a gap of a machine shell according to requirements, when the upper mouthpiece 15 generates air flow, the hanging strip 31 can be enabled to move, the effect of stirring hot air flow is achieved, and the heating effect is further even.
The above embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, but various modifications can be made by those skilled in the art without inventive effort from the above concepts, and all modifications are within the scope of the present invention.
Claims (10)
1. Heating equipment for air tightness test, comprising a heating box (1), characterized in that: be provided with multidirectional electrical heating structure in heating cabinet (1), and install through erecting leading truck (4) lift on heating cabinet (1) and seal door (5), seal door (5) and drive through hydraulic seat (6), and fixedly connected with guide rail (7) on heating cabinet (1), and movable mounting puts frame (8) on guide rail (7), be provided with transition box (9) in heating cabinet (1), and transition box (9) top is provided with drainage tube (10), drainage tube (10) port department is provided with exhaust fan (11), and the side of transition box (9) is provided with butt joint pipe (12), the bottom of putting frame (8) is provided with base case (13), and is provided with connecting pipe (14) and last mouthpiece (15) on base case (13), and the port of returning pipe (16) and echo pipe (10) sets up relatively, be provided with initiative seal structure on transition box (9) and butt joint pipe (12), can be provided with on top carrier bar (27) and position (31) and can dismantle in setting up in adjustment suspender (31).
2. A heating apparatus for air tightness testing according to claim 1, wherein: the multidirectional electric heating structure comprises an upper heater (2) arranged at the top of a heating box (1), and a side heater (3) arranged on the side wall, wherein the upper heater (2) and the side heater (3) are both electric heaters, a vertical guide frame (4) is arranged at two sides of the heating box (1), and a sealing door (5) is positioned at the opening of the heating box (1).
3. A heating apparatus for air tightness testing according to claim 1, wherein: the guide rail (7) is horizontally connected to the opening side of the heating box (1), casters are arranged at the bottom of the placement frame (8), the placement frame (8) is installed on the guide rail (7) through the casters, and at least three placement layers are arranged in the placement frame (8).
4. A heating apparatus for air tightness testing according to claim 2, wherein: the transition box (9) is installed in the bottom of the heating box (1), the drainage tube (10) is vertically arranged, the top end of the drainage tube (10) is provided with a diffusion type opening, the exhaust fan (11) is located at the opening position, and the exhaust fan (11) is arranged towards the upper heater (2).
5. A heating apparatus for air tightness testing according to claim 1, wherein: the butt joint pipe (12) and the connecting pipe (14) are horizontally arranged, external threads are arranged on the butt joint pipe (12) and the connecting pipe (14), and the butt joint pipe (12) and the connecting pipe (14) are correspondingly provided with two groups.
6. A heating apparatus for air tightness testing according to claim 1, wherein: the connecting pipe (14) is installed in the side of base box (13), and go up the top surface of blow opening (15) range setting at base box (13), go up blow opening (15) and set up towards the layer of putting frame (8), and return pipe (16) vertical setting, the top of returning pipe (16) is diffusion type opening, be provided with the air cavity in base box (13), and connecting pipe (14), go up blow opening (15) and return pipe (16) all communicate with the air cavity of base box (13).
7. A heating apparatus for air tightness testing according to claim 1, wherein: initiative seal structure is including setting up screw sleeve (17) on butt joint pipe (12), and is provided with the internal thread on screw sleeve (17), be provided with outer floor (18) on the outer wall of screw sleeve (17), rotate on transition box (9) and install pivot (19), and fixed mounting has push away wheel (20) and gear (26) on pivot (19), be provided with on push away tooth (21) on push away wheel (20), and push away tooth (21) and outer floor (18) contact connection, the diameter of push away wheel (20) is at least twice of gear (26).
8. A heating apparatus for air tightness testing according to claim 7, wherein: the active sealing structure further comprises a guide seat (22) arranged on the transition box (9), a spring guide rod (23) is arranged on the guide seat (22), a lifting frame (24) is fixedly connected to the spring guide rod (23), the lifting frame (24) is controlled by an electric push rod, a rack (25) is fixedly connected to the lifting frame (24), and the rack (25) is meshed with a gear (26).
9. A heating apparatus for air tightness testing according to claim 1, wherein: the ejector rod (27) is horizontally arranged, the ejector rod (27) is provided with a socket (28), the socket (28) is a rod piece with a slot in the middle, the socket (28) is connected with the ejector rod (27) through clamping pieces (29) on two sides, an insert (30) is assembled in the slot of the socket (28), and a hanging strip (31) is arranged at the bottom of the insert (30).
10. A heating method of an air tightness test heating apparatus as defined in any of claims 1-9, characterized by: the heating method comprises the following steps:
s1: opening a closed door (5) on the heating box (1), moving a placing frame (8) to the outside of the heating box (1) by virtue of a guide rail (7), uniformly placing a shell, and simultaneously arranging a hanging strip (31) on the placing frame (8) according to the placing position, so that the hanging strip (31) is positioned in a gap of the shell, and then sending the placing frame (8) into the heating box (1) to close the closed door (5);
s2, when the placing frame (8) enters the heating box (1), the bottom box (13) is communicated with the transition box (9) through the connection of the connecting pipe (14) and the butt joint pipe (12), and the connecting pipe (14) and the butt joint pipe (12) are connected together in a sealing mode through an active sealing structure;
s3: direct heating is carried out from the top and the side of the machine shell through a multidirectional electric heating structure, meanwhile, carrying of gas is carried out through a drainage tube (10) with an exhaust fan (11), hot air flow close to the upper heater (2) enters the drainage tube (10), then enters a bottom box (13) through a transition box (9), a part of the hot air flow is diffused from an upper blowing opening (15) at the top of the bottom box (13) and is directly blown to the bottom of the machine shell, and the other part of the air flow in the bottom box (13) enters a return pipe (16) and is blown from the end part of the return pipe (16) to the position of the drainage tube (10), so that hot air flow circulation is formed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310895015.8A CN116614906B (en) | 2023-07-20 | 2023-07-20 | Heating equipment for air tightness test and heating method thereof |
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| CN116614906B true CN116614906B (en) | 2023-09-12 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN215724639U (en) * | 2021-07-03 | 2022-02-01 | 潍坊海心农业科技有限公司 | Efficient electric heat blast air drying cabinet |
| CN216420648U (en) * | 2021-07-30 | 2022-05-03 | 聊城市开发区金运钢管有限公司 | Raw material heating device for seamless steel pipe production |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN215724639U (en) * | 2021-07-03 | 2022-02-01 | 潍坊海心农业科技有限公司 | Efficient electric heat blast air drying cabinet |
| CN216420648U (en) * | 2021-07-30 | 2022-05-03 | 聊城市开发区金运钢管有限公司 | Raw material heating device for seamless steel pipe production |
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