An air-heat internal circulation oven for insulator curing

Abstract

The present invention discloses an air-heated internal circulation oven for curing insulators, and relates to the technical field of air-heated internal circulation ovens, comprising a box body, wherein the box body comprises a first drying chamber and a second drying chamber, the temperature of the hot air circulated and transported in the first drying chamber is higher than the temperature of the hot air circulated and transported in the second drying chamber, and the box body is also provided with at least one transport chain running through the first drying chamber and the second drying chamber, a first movable frame is fixedly mounted on the transport chain, and at least one curing mould is arranged on the first movable frame; in the air-heated internal circulation oven for curing insulators, the curing mould arranged on the first movable frame is transported from the high-temperature first drying chamber to the low-temperature second drying chamber by the arranged transport chain, and during the movement, the upper mould and the lower mould of the curing mould can be separated from the insulator located in the curing mould, and the progress of secondary curing of each insulator can be accelerated.

Description

Technical Field

[0001] The invention relates to the technical field of wind-heated internal circulation ovens, and in particular to a wind-heated internal circulation oven for insulator curing. Background Art

[0002] As an important equipment in the field of high-voltage switchgear, insulators are generally cast from epoxy resin materials. Epoxy resin is a thermosetting resin. After being injected into the insulator mold, it is placed in an oven with air-heat internal circulation and maintained at a certain temperature for a period of time to undergo a cross-linking reaction, and then initially solidify into a hard body. However, during high-temperature curing, due to the rapid curing and shrinkage of the material, some residual stress will inevitably be generated. Therefore, the insulator needs to be placed under appropriate low-temperature conditions for a period of time so that the molecules inside the material can be slowly rearranged, so that the stress can be released to a certain extent, thereby improving the stability of the cured insulator after thorough curing, thereby improving the quality of the insulator.

[0003] At present, in the prior art, during the curing process of an insulator mold that has been injected with epoxy resin in some ovens, the curing mold needs to be placed in the high-temperature zone of the oven for preliminary curing treatment, and then transported to the low-temperature zone of the oven through conveying equipment such as a conveyor chain for secondary curing treatment; however, when the secondary curing treatment is carried out in the low-temperature zone, the epoxy resin in the insulator mold is wrapped by the shell of the insulator mold, resulting in extremely slow stress release within the effective time. Therefore, it is necessary to extend the time of secondary curing in the low-temperature zone, resulting in low curing efficiency. Summary of the invention

[0004] The purpose of the present invention is to provide an air-heat internal circulation oven for insulator curing to solve the deficiencies in the above-mentioned prior art.

[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: an air-heated internal circulation oven for curing insulators, comprising a box body, wherein the box body comprises a first baking chamber and a second baking chamber, the temperature of the hot air circulated and transported in the first baking chamber is higher than the temperature of the hot air circulated and transported in the second baking chamber, and the box body is also provided with at least one transport chain running through the first baking chamber and the second baking chamber, a first movable frame is fixedly mounted on the transport chain, and at least one curing mold is arranged on the first movable frame, the curing mold comprises an upper mold and a lower mold, and the upper mold and the lower mold are both vertically slidably connected to the first movable frame; in the process of the transport chain driving the first movable frame to move, the upper mold and the lower mold of the curing mold closed in the first baking chamber are driven by the mold separation mechanism to slide relative to the first movable frame in the second baking chamber and separate, so that the insulator located in the curing mold is exposed in the second baking chamber.

[0006] Preferably, the mold splitting mechanism includes: an upper track, which includes a first upper horizontal section, a first inclined section and a second upper horizontal section that are connected, and the upper mold is slidably connected in the upper track; a lower track, which includes a first lower horizontal section, a second inclined section and a second lower horizontal section that are connected, and the lower mold is slidably connected in the lower track; a second movable frame, which is slidably connected to the upper track; at least one clamping assembly, which is used to clamp the insulator exposed in the second baking chamber; the first movable frame drives the insulator in the curing mold to move in the box body in the following strokes: a first stroke, driving the upper mold to slide along the first upper horizontal section, the first inclined section and the second upper horizontal section in sequence to separate the upper mold from the insulator, so that the upper surface of the insulator is exposed in the second baking chamber; a second stroke, the first movable frame drives the second movable frame to move in the second baking chamber so that the clamping assembly clamps the insulator; a third stroke, driving the lower mold to slide along the first lower horizontal section, the second inclined section and the second lower horizontal section in sequence to separate the lower mold from the insulator, so that the lower surface of the insulator is exposed in the second baking chamber.

[0007] Preferably, the clamping assembly includes: a trigger rod, which is slidably connected to the second moving frame; a moving platform, which is slidably connected to the second moving frame; a first wedge block, which is fixedly connected to an end of the trigger rod away from the second moving frame, and the first wedge block is slidably connected to the moving platform; a second spring, one end of which is fixedly connected to the moving platform, and the other end is fixedly connected to the wedge block; a sliding rod, which is vertically slidably connected to the moving platform, and one end of the sliding rod abuts and cooperates with the inclined surface of the first wedge block; a turntable, which is rotatably connected to the moving platform; two symmetrically arranged clamping arms, each clamping arm is elastically rotatably connected to the turntable; a double-bevel block, which is vertically slidably connected to the turntable and is coaxially rotatably connected to the sliding rod; a transmission assembly, which is used to drive the trigger rod to slide relative to the second moving frame.

[0008] Preferably, the transmission assembly is a guide rail fixedly connected to the upper rail, and the guide rail includes a connected trigger inclined section and an abutting horizontal section.

[0009] Preferably, the elastic force of the second spring to restore the deformation is much greater than the elastic force of the first spring to restore the elastic deformation.

[0010] Preferably, the end of each clamping arm for clamping the insulator is fixedly connected to a clamping block, and the contact surface of each clamping block for clamping the insulator is fixedly connected to a heat-conducting anti-skid pad.

[0011] Preferably, a locking member is further provided between the second movable frame and the upper rail, and the locking member includes: a locking pin, which is vertically slidably connected to the second movable frame, and the end of the locking pin is spherically arranged; a storage cavity, which is opened on the second movable frame, and a third spring is provided in the storage cavity, one end of the third spring is fixedly connected to the second movable frame, and the other end is fixedly connected to the locking pin; a pin hole, which is opened on the upper rail.

[0012] In the above technical scheme, the present invention provides an air-heated internal circulation oven for curing insulators. After the preliminary curing of the insulator in the curing mold in the first baking chamber at high temperature is completed, the curing mold arranged on the first movable rack is transported from the high-temperature first baking chamber to the low-temperature second baking chamber through the arranged transport chain, and during the movement, the upper mold and the lower mold of the curing mold can be separated from the insulator located in the curing mold, so that the surface of the insulator located in the second baking chamber is exposed in the second baking chamber, so that the low temperature environment in the second baking chamber under the low temperature zone can prompt each insulator to accelerate the progress of secondary curing, thereby accelerating the curing efficiency, and at the same time, the stress in the insulator can be fully released to obtain a better curing effect, thereby improving the quality of the insulator after complete curing. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0014] Figure 1 A schematic diagram of the structure of a box provided by an embodiment of the present invention;

[0015] Figure 2 A schematic structural diagram of a mold splitting mechanism provided in an embodiment of the present invention;

[0016] Figure 3 The motion state of the first mobile frame provided in the embodiment of the present invention Figure I ;

[0017] Figure 4 The motion state of the first mobile frame provided in the embodiment of the present invention Figure II ;

[0018] Figure 5 A state diagram of an upper mold being separated from an insulator provided by an embodiment of the present invention;

[0019] Figure 6 The motion state of the first mobile frame provided in the embodiment of the present invention Figure III ;

[0020] Figure 7 Cooperation between the first mobile frame and the second mobile frame provided in the embodiment of the present invention Figure I

[0021] Figure 8 A schematic structural diagram of a first mobile rack provided in an embodiment of the present invention;

[0022] Fig. 9Cooperation between the first mobile frame and the second mobile frame provided in the embodiment of the present invention Figure II ;

[0023] Fig.10 A schematic diagram of the structure of a second mobile rack provided in an embodiment of the present invention;

[0024] Fig.11 A schematic diagram of the structure of a clamping assembly provided in an embodiment of the present invention;

[0025] Fig.12 A partial schematic diagram of a second mobile rack provided in an embodiment of the present invention;

[0026] Fig.13 The motion state of the second wedge block provided in the embodiment of the present invention Figure I ;

[0027] Fig.14 The motion state of the second wedge block provided in the embodiment of the present invention Figure II ;

[0028] Fig.15 The motion state of the second wedge block provided in the embodiment of the present invention Figure III ;

[0029] Fig.16 A state diagram of the lower mold being separated from the insulator provided in an embodiment of the present invention.

[0030] Description of reference numerals:

[0031] 1. Box; 11. First baking chamber; 12. Second baking chamber; 2. First moving frame; 21. Stop rod; 22. Stop block; 3. Curing mold; 31. Upper mold; 32. Lower mold; 41. Upper track; 411. First upper horizontal section; 412. First inclined section; 413. Second upper horizontal section; 42. Lower track; 421. First lower horizontal section; 422. Second inclined section; 423. Second lower horizontal section; 43. Second moving frame; 44. Frame; 6, guide rail; 61, trigger tilt section; 62, abutment horizontal section; 7, clamping assembly; 71, first wedge block; 72, second spring; 73, slide bar; 74, turntable; 75, clamping arm; 76, double inclined block; 77, trigger rod; 78, moving table; 79, first spring; 8, locking piece; 81, locking pin; 82, storage chamber; 83, third spring; 84, pin hole; 9, insulator; 10, damping plate. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0033] See also Figure 1-16An embodiment of the present invention provides an air-heated internal circulation oven for insulator curing, comprising a box body 1, wherein the box body 1 comprises a first drying chamber 11 and a second drying chamber 12. Specifically, the first drying chamber 11 and the second drying chamber 12 are both provided with an internal circulation air supply module for conveying circulating air, and both internal circulation air supply modules are implemented by using the existing technology. The first drying chamber 11 is provided with a first air inlet and a first air outlet for circulating hot air, and the second drying chamber 12 is provided with a second air inlet and a second air outlet for circulating hot air. The temperature of the hot air circulated and conveyed in the first drying chamber 11 is higher than the temperature of the hot air circulated and conveyed in the second drying chamber 12. Based on this, the first drying chamber 11 is a high temperature zone, and the second drying chamber 12 is a low temperature zone. Zone (higher than normal temperature but lower than the temperature in the high temperature zone), at least one transport chain is also provided in the box body 1, which runs through the first drying chamber 11 and the second drying chamber 12, and a first mobile frame 2 is fixedly installed on the transport chain, and at least one curing mold 3 is provided on the first mobile frame 2, and the curing mold 3 includes an upper mold 31 and a lower mold 32, and the upper mold 31 and the lower mold 32 are both vertically slidably connected to the first mobile frame 2; in the process of the transport chain driving the first mobile frame 2 to move, the upper mold 31 and the lower mold 32 of the curing mold 3 in the first drying chamber 11 are driven by the mold separation mechanism to slide relative to the first mobile frame 2 in the second drying chamber 12 and separate, so that the insulator 9 located in the curing mold 3 is exposed in the second drying chamber 12. It should be noted that the transport chain can drive the first mobile frame 2 to move from the first drying chamber 11 to the second drying chamber 12 in the box body 1, so that the insulator 9 in the curing mold 3 on the first mobile frame 2 is transported from the first drying chamber 11 at a high temperature to the second drying chamber 12 at a low temperature.

[0034] Specifically, after the preliminary curing of the insulator 9 in the curing mold 3 in the first baking chamber 11 at high temperature is completed, the curing mold 3 arranged on the first mobile frame 2 is transported from the high-temperature first baking chamber 11 to the low-temperature second baking chamber 12 through the provided transport chain, and during the movement, the upper mold 31 and the lower mold 32 of the curing mold 3 can be separated from the insulator 9 located in the curing mold 3, so that the surface of the insulator 9 located in the second baking chamber 12 is exposed in the second baking chamber 12, so that the low temperature environment in the second baking chamber 12 in the low temperature zone can promote the progress of secondary curing of each insulator 9, thereby accelerating the curing efficiency, and at the same time, the stress in the insulator 9 can be fully released to obtain a better curing effect, thereby improving the quality of the insulator 9 after complete curing.

[0035] The mold splitting mechanism includes an upper rail 41, a lower rail 42, a second moving frame 43 and at least one clamping assembly 7. The upper rail 41 includes a first upper horizontal section 411, a first inclined section 412 and a second upper horizontal section 413 connected to each other. The upper mold 31 is slidably connected in the upper rail 41; the lower rail 42 includes a first lower horizontal section 421, a second inclined section 422 and a second lower horizontal section 423 connected to each other. The lower mold 32 is slidably connected in the lower rail 42; the second moving frame 43 is slidably connected to the upper rail 41; the clamping assembly 7 is used to clamp the insulator 9 exposed in the second baking chamber 12; the first moving frame 2 drives the insulator 9 in the curing mold 3 to be cured. The strokes of movement in the box body 1 include: a first stroke, driving the upper mold 31 to slide along the first upper horizontal section 411, the first inclined section 412 and the second upper horizontal section 413 in sequence to separate the upper mold 31 from the insulator 9, so that the upper surface of the insulator 9 is exposed in the second drying chamber 12; a second stroke, the first moving frame 2 drives the second moving frame 43 to move in the second drying chamber 12 so that the clamping assembly 7 clamps the insulator 9; a third stroke, driving the lower mold 32 to slide along the first lower horizontal section 421, the second inclined section 422 and the second lower horizontal section 423 in sequence to separate the lower mold 32 from the insulator 9, so that the lower surface of the insulator 9 is exposed in the second drying chamber 12. It should be noted that the abutting parts between the upper mold 31 and the lower mold 32 are provided with sealing gaskets, so as to improve the sealing performance of the upper mold 31 and the lower mold 32 in the mold closing state, and facilitate the mold closing of the upper mold 31 and the lower mold 32. It should be further explained that the slopes of the first inclined section 412 and the second inclined section 422 are both greater than the slope of the conical surface of the insulator 9, so that the upper mold 31 can be driven away from the insulator 9 that has been solidified in the first baking chamber 11 when passing through the first inclined section 412 and can be demolded smoothly, and the lower mold 32 can be driven away from the insulator 9 that has been solidified in the first baking chamber 11 and can be demolded smoothly when passing through the second inclined section 422. At the same time, it should be further explained that the direction in which the transport chain drives the first mobile frame 2 to move from the first drying chamber 11 to the second drying chamber 12 is the forward direction. At this point, the first inclined section 412 is closer to the first drying chamber 11 than the second inclined section 422. At this point, when the insulator 9 located in the curing mold 3 follows the first mobile frame 2 to move from the first drying chamber 11 to the second drying chamber 12, the upper mold 31 will be demolded first, and the lower mold 32 will be demolded after the clamping assembly 7 clamps the insulator 9. In this process, the lower mold 32 plays a supporting role, which facilitates the clamping assembly 7 to clamp the insulator 9.The upper mold 31 is slidably connected to the upper track 41 through the first extension rod, and the lower mold 32 is slidably connected to the lower track 42 through the second extension rod. Based on this, rollers are rotatably connected to the first extension rod and the second extension rod. The roller on the first extension rod is located in the slide groove of the upper track 41, and the roller on the second extension rod is located in the slide groove of the lower track 42, thereby reducing the friction resistance between the upper mold 31 and the upper track 41 and the friction resistance between the lower mold 32 and the lower track 42. The first extension rod is slidably connected to the first mobile frame 2 so that the upper mold 31 can slide vertically relative to the first mobile frame 2, and the second extension rod is slidably connected to the second mobile frame 43 so that the lower mold 32 can slide vertically relative to the first mobile frame 2. Among them, the movable platform 78 is slidably connected to the second movable frame 43 through a guide rod. The second movable frame 43 is provided with a through hole for the guide rod to slide. A stopper is fixedly connected to the end of the guide rod away from the second movable frame 43. When the stopper is in contact with the second movable frame 43, it indicates that the movable platform 78 slides away from the second movable frame 43 to the maximum distance.

[0036] It should be noted that the contact surfaces of the upper mold 31 and the lower mold 32 of the curing mold 3 with the insulator 9 can be graphite coated, which effectively prevents the cured insulator 9 from adhering to the curing mold 3 and affecting the upper mold 31 and the lower mold 32 from being separated from the insulator 9.

[0037] Specifically, the first moving frame 2 follows the transport chain to make the insulator 9 in the curing mold 3 move in the box body 1, that is, the upper mold 31 slides along the first upper horizontal section 411, the first inclined section 412 and the second upper horizontal section 413 in the upper track 41 in sequence, and the lower mold 32 slides along the first lower horizontal section 421, the second inclined section 422 and the second lower horizontal section 423 in the lower track 42 in sequence. The specific demoulding process includes: the upper mold 31 moves along the first upper horizontal section 411 to the second upper horizontal section 413, and in the process of passing through the first inclined section 412, the upper mold 31 is driven to separate from the insulator 9 so that the upper surface of the insulator 9 is exposed. At the same time, the lower mold 32 keeps sliding along the first lower horizontal section 421, and then the second moving frame 43 is driven to follow the first moving frame 2 The lower mold 32 moves and clamps the end of the insulator 9 through the provided clamping assembly 7. Then, the lower mold 32 is driven to separate from the insulator 9 during the process of moving from the first lower horizontal section 421 to the second lower horizontal section 423 and passing through the second inclined section 422 to expose the lower surface of the insulator 9. At the same time, the upper mold 31 slides along the second upper horizontal section 413. So far, the whole process enables the insulator 9 that moves from the first baking chamber 11 to the second baking chamber 12 to expose the outer surface for low-temperature curing. After the provided clamping assembly 7 clamps the insulator 9, it can not only facilitate the demoulding of the lower mold 32, but also enable the insulator 9 that has been separated from the curing mold 3 to be better cured at low temperature. So far, while reducing the curing time, it can also improve the quality of the cured insulator 9.

[0038] Among them, a locking member 8 is also provided between the second mobile frame 43 and the upper rail 41, and the locking member 8 includes a locking pin 81, a receiving chamber 82 and a pin hole 84. The locking pin 81 is vertically slidably connected to the second mobile frame 43, and the end of the locking pin 81 is arranged in a spherical shape; the receiving chamber 82 is provided on the second mobile frame 43, and a third spring 83 is provided in the receiving chamber 82, one end of the third spring 83 is fixedly connected to the second mobile frame 43, and the other end is fixedly connected to the locking pin 81; the pin hole 84 is provided on the upper rail 41. Among them, it should be noted that, when the second mobile frame 43 is locked on the upper rail 41, only no more than half of the spherical end of the locking pin 81 will be inserted into the pin hole 84, so that the first mobile frame 2 can directly push the second mobile frame 43 after abutting against the second mobile frame 43, so that the second mobile frame 43 moves with the first mobile frame 2. Based on this, the locking member 8 can lock the second moving frame 43 on the upper rail 41 in the early stage, and can be directly pushed by the first moving frame 2 in the later stage so that the second moving frame 43 follows the first moving frame 2 to slide relative to the upper rail 41 .

[0039] Specifically, the first movable frame 2 abuts against and pushes the second movable frame 43 so that the second movable frame 43 receives the thrust given by the first movable frame 2. At this time, the locking pin 81 can overcome the elastic force of the third spring 83 to restore the deformation and be squeezed into the storage cavity 82 until the insertion end of the locking pin 81 is disengaged from the pin hole 84. At this point, the second movable frame 43 and the upper rail 41 are in an unlocked state. At this point, the second movable frame 43 is pushed by the first movable frame 2 to slide in the second baking chamber 12, thereby facilitating the subsequent triggering of the clamping assembly 7 to clamp the corresponding insulator 9.

[0040] The clamping assembly 7 includes a trigger rod 77, a moving platform 78, a first wedge block 71, a second spring 72, a slide bar 73, a turntable 74, two symmetrically arranged clamping arms 75, a double-bevel block 76 and a transmission assembly. The trigger rod 77 is slidably connected to the second moving frame 43; the moving platform 78 is slidably connected to the second moving frame 43; the first wedge block 71 is fixedly connected to the end of the trigger rod 77 away from the second moving frame 43, and the first wedge block 71 is slidably connected to the moving platform 78; the second spring 72 is fixedly connected to the end of the trigger rod 77 away from the second moving frame 43, and the first wedge block 71 is slidably connected to the moving platform 78; the second spring One end of the spring 72 is fixedly connected to the moving platform 78, and the other end is fixedly connected to the wedge block; the slide bar 73 is vertically slidably connected to the moving platform 78, and one end of the slide bar 73 is abutted and matched with the inclined surface of the first wedge block 71; the turntable 74 is rotatably connected to the moving platform 78; each clamping arm 75 is elastically rotatably connected to the turntable 74; the double-bevel block 76 is vertically slidably connected to the turntable 74, and is coaxially rotatably connected with the slide bar 73; the transmission assembly is used to drive the trigger rod 77 to slide relative to the second moving frame 43. It should be noted that the clamping arm 75 is rotatably connected to the turntable 74 through a shaft, and a torsion spring (not shown in the figure) is sleeved on the shaft, one end of the torsion spring is fixedly connected to the turntable 74, and the other end is fixedly connected to the clamping arm 75, and the process of the torsion spring restoring elasticity is used to drive the two clamping arms 75 to separate. It should be noted that a T-shaped slot is provided on the inclined surface of the first wedge block 71, and a T-shaped block located in the T-shaped slot is fixedly connected to the contact surface between the slide bar 73 and the first wedge block 71, so that the first wedge block 71 can drive the slide bar 73 to move upward, so that the two clamping arms 75 release the clamping of the insulator 9. The inclined surface of the double-bevel block 76 is arranged downward, so that when the double-bevel block 76 moves downward relative to the moving platform 78, it drives the two clamping arms 75 to rotate relative to the rotating platform 74 so that the two clamping arms 75 clamp the insulator 9.

[0041] It should be further explained that the transmission assembly is a guide rail 6 fixedly connected to the upper rail 41, and the guide rail 6 includes a connected trigger inclined section 61 and a contact horizontal section 62. It should be explained that when the trigger rod 77 contacts the trigger inclined section 61, the trigger rod 77 is driven to slide relative to the second moving frame 43, and the contact horizontal section 62 allows the trigger rod 77 to maintain a state after sliding a certain distance relative to the second moving frame 43.

[0042] It should also be noted that the elastic force of the second spring 72 to restore the deformation is much greater than the elastic force of the first spring 79 to restore the elastic deformation. In a preferred state, when the trigger rod 77 is driven to slide relative to the second mobile frame 43, the trigger rod 77 will drive the first wedge block 71 to slide relative to the second mobile frame 43. At the same time, since the elastic force of the second spring 72 to restore the deformation is much greater than the elastic force of the first spring 79 to restore the elastic deformation, the first spring 79 will be stretched, while the second spring 72 will not be deformed, so that the moving platform 78 will slide synchronously relative to the second moving frame 43 until the two clamping arms 75 are driven to be located directly above the insulator 9. At this time, the moving platform 78 has slid to the maximum distance relative to the second moving frame 43, and then the trigger rod 77 continues to drive the first wedge block 71 to move relative to the second moving frame 43. At this point, the second spring 72 begins to compress so that the first wedge block 71 will move relative to the moving platform 78 until the two clamping arms 75 are driven to clamp the insulator 9.

[0043] The end of each clamping arm 75 for clamping the insulator 9 is fixedly connected with a clamping block, and the contact surface of each clamping block for clamping the insulator 9 is fixedly connected with a thermally conductive anti-skid pad. It should be noted that the contact surface of the clamping block for clamping the insulator 9 is an arc surface, thereby reducing the contact area between the insulator 9 and the clamping arm 75 to achieve a better low-temperature curing effect; at the same time, the anti-skid pattern on the thermally conductive anti-skid pad can increase the friction between the clamping arm 75 and the insulator 9, achieving a better clamping effect; and the thermally conductive anti-skid pad itself has an elastic effect, which effectively prevents the two clamping arms 75 from damaging the insulator 9 when clamping the insulator 9.

[0044] Specifically, when the second moving frame 43 follows the first moving frame 2 to move in the second baking chamber 12, the trigger rod 77 will be driven to abut against the trigger inclined section 61 of the guide rail 6 first, so that the trigger rod 77 and the first wedge block 71 fixedly connected to the trigger rod 77 will slide relative to the second moving frame 43. At the same time, because the elastic force of the second spring 72 is greater than the elastic force of the first spring 79, the first wedge block 71 will drive the moving platform 78 to slide away from the second moving frame 43 synchronously, until the moving platform 78 slides away from the second moving frame 43 to the maximum distance. This process can make the two clamping arms 75 be located at The second spring 72 is compressed to make the first wedge block 71 slide relative to the movable platform 78, so that the inclined surface of the first wedge block 71 abuts against the slide bar 73 to drive the slide bar 73 to move downward relative to the movable platform 78, so that the double-bevel block 76 moves downward relative to the movable platform 78, thereby making the two inclined surfaces of the double-bevel block 76 abut against the corresponding clamping arms 75 to make the two clamping arms 75 rotate relative to the turntable 74 and clamp the insulator 9.

[0045] Based on the above, as a preferred embodiment of the present invention, if there are multiple transport chains, then there are also multiple first mobile racks 2, and each first mobile rack 2 is provided with multiple curing molds 3. At this point, the trigger rods 77 corresponding to each curing mold 3 are connected by a connecting rod, so when the connecting rod abuts against the trigger inclined section 61, each clamping assembly 7 can be driven to clamp the insulator 9; wherein, Figure 7-9 and Fig.16 As shown, each first movable frame 2 is also fixedly connected to an L-shaped blocking rod 21, and a notch is provided on the blocking rod 21 for the guide rail 6 to pass through to avoid obstruction during the movement of the first movable frame 2 in the second baking zone. After the blocking rod 21 abuts against the connecting rod, the first movable frame 2 can be driven to push the second movable frame 43. The blocking rod 21 is fixedly connected to a limited position block 22, and a plurality of damping plates 10 corresponding to each first movable frame 2 are fixedly connected in the second baking chamber 12. A damping sleeve is fixedly connected to the peripheral side surface of each turntable 74. At this point, when each clamping assembly 7 After the two clamping arms 75 clamp the corresponding insulators 9, each transport chain can drive the first mobile frame 2 to drive the second mobile frame 43 to reciprocate in the second drying chamber 12, and the damping sleeves on each turntable 74 are attached to the damping plate 10 for friction, so that the turntable 74 rotates relative to the mobile table 78, thereby effectively making the clamped insulators 9 reciprocate in the second drying chamber 12, so that the circulating hot air in the second drying chamber 12 is blown to the insulators 9 more evenly, thereby further reducing the curing time of each insulator 9 in the second drying chamber 12. Among them, through the mutual cooperation between the provided blocking rod 21 and the limit block 22, each connecting rod can be driven to slide reciprocatingly on the abutting horizontal section 62, thereby realizing that each insulator 9 is clamped by the corresponding clamping assembly 7 and reciprocates in the second drying chamber 12.

[0046] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An air-heat internal circulation oven for insulator curing, comprising a box body, characterized in that: The box body includes a first drying chamber and a second drying chamber, the temperature of the hot air circulated and transported in the first drying chamber is higher than the temperature of the hot air circulated and transported in the second drying chamber, the box body is also provided with at least one transport chain running through the first drying chamber and the second drying chamber, a first moving frame is fixedly mounted on the transport chain, at least one curing mold is arranged on the first moving frame, the curing mold includes an upper mold and a lower mold, and the upper mold and the lower mold are both vertically slidably connected to the first moving frame; When the transport chain drives the first moving frame to move, the upper mold and the lower mold of the curing mold in the first drying chamber are driven by the mold separation mechanism to slide relative to the first moving frame in the second drying chamber and separate, so that the insulator in the curing mold is exposed in the second drying chamber; The mold splitting mechanism comprises: An upper track, comprising a first upper horizontal section, a first inclined section and a second upper horizontal section connected to each other, wherein the upper mold is slidably connected in the upper track; A lower track, comprising a first lower horizontal section, a second inclined section and a second lower horizontal section connected to each other, wherein the lower mold is slidably connected in the lower track; A second moving frame is slidably connected to the upper track; At least one clamping assembly, used for clamping the insulator exposed in the second drying chamber; The first moving frame drives the insulator in the curing mold to move in the box body in the following steps: In the first stroke, the upper mold is driven to slide along the first upper horizontal section, the first inclined section and the second upper horizontal section in sequence to separate the upper mold from the insulator, so that the upper surface of the insulator is exposed in the second baking chamber; In the second stroke, the first movable frame drives the second movable frame to move in the second drying chamber so that the clamping assembly clamps the insulator; The third stroke drives the lower mold to slide along the first lower horizontal section, the second inclined section and the second lower horizontal section in sequence to separate the lower mold from the insulator, so that the lower surface of the insulator is exposed in the second baking chamber.

2. The wind-heat internal circulation oven for insulator curing according to claim 1, characterized in that: The clamping assembly comprises: a trigger rod slidably connected to the second moving frame; A moving platform slidably connected to the second moving frame; A first wedge-shaped block is fixedly connected to an end of the trigger rod away from the second moving frame, and the first wedge-shaped block is slidably connected to the moving platform; A second spring, one end of which is fixedly connected to the moving platform, and the other end of which is fixedly connected to the wedge block; A slide bar is vertically slidably connected to the moving platform, and one end of the slide bar is in abutment with the inclined surface of the first wedge block; A turntable, which is rotatably connected to the moving table; two symmetrically arranged clamping arms, each clamping arm is elastically rotatably connected to the turntable; A double-bevel block is vertically slidably connected to the turntable and is coaxially rotatably connected to the slide rod; The transmission assembly is used to drive the trigger rod to slide relative to the second moving frame.

3. The wind-heat internal circulation oven for insulator curing according to claim 2, characterized in that: The transmission assembly is a guide rail fixedly connected to the upper rail, and the guide rail includes a connected trigger inclined section and an abutting horizontal section.

4. The wind-heat internal circulation oven for insulator curing according to claim 2, characterized in that: The elastic force of the second spring to restore the deformation is greater than the elastic force of the first spring to restore the elastic deformation.

5. The wind-heat internal circulation oven for insulator curing according to claim 2, characterized in that: The end of each clamping arm for clamping the insulator is fixedly connected with a clamping block, and the contact surface of each clamping block for clamping the insulator is fixedly connected with a heat-conducting anti-skid pad.

6. The wind-heat internal circulation oven for insulator curing according to claim 1, characterized in that: A locking member is also provided between the second movable frame and the upper rail, and the locking member includes: A lock pin is vertically slidably connected to the second movable frame, and an end of the lock pin is arranged in a spherical shape; A storage chamber is provided on the second movable frame, and a third spring is arranged in the storage chamber, one end of the third spring is fixedly connected to the second movable frame, and the other end of the third spring is fixedly connected to the locking pin; A pin hole is provided on the upper track.

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