CN215002849U

CN215002849U - Muffle furnace

Info

Publication number: CN215002849U
Application number: CN202120890757.8U
Authority: CN
Inventors: 郭德祥; 蒋霞; 王梦鑫
Original assignee: Chengdu Xuzhe Pharmaceutical Technology Co Ltd
Current assignee: Sichuan Aobang Gude Pharmaceutical Co ltd
Priority date: 2021-04-28
Filing date: 2021-04-28
Publication date: 2021-12-03
Anticipated expiration: 2031-04-28

Abstract

The utility model provides a muffle furnace relates to firing equipment technical field. The muffle furnace comprises an outer furnace body, an inner furnace body and a hearth which are sequentially arranged from outside to inside. The entry has been seted up to one side of outer furnace body, and the entrance is pegged graft and is had the furnace gate, and the furnace gate passes through locking mechanism to be fixed at the entrance. A supporting rod is fixed in the middle of the furnace door, a supporting plate is fixed on the supporting rod, and a crucible frame is arranged on the supporting plate. An inserted bar with an I-shaped cross section is fixed at the lower part of the furnace door, a guide rail is arranged at the bottom of the furnace chamber, and the guide rail is provided with a jack matched with the inserted bar. A cooling channel is reserved between the outer furnace body and the inner furnace body and is connected with a cooling mechanism, and the cooling mechanism is used for accelerating the cooling of the hearth. Through fixing the crucible frame on the furnace gate, combine the use of inserted bar and guide rail again for the operator only needs to take the furnace gate out a section distance when getting into the crucible, can arrange the crucible in on the crucible frame, and the operator need not stretch into furnace with the hand in, this has greatly reduced the risk that the operator was scalded.

Description

Muffle furnace

Technical Field

The utility model belongs to the technical field of the firing equipment technique and specifically relates to a muffle furnace is related to.

Background

The muffle furnace is a universal heating device, and the universal nomenclature in China includes the following: electric furnace, resistance furnace, Mafu furnace. Present muffle furnace when using, need the operator to stretch into the furnace with the hand in order to get and put the crucible, though the operator generally all wears thermal-insulated gloves, nevertheless because the inner space of muffle furnace is darker for the operator when getting and putting the crucible, has the risk of being scalded.

Disclosure of Invention

In order to the above situation, the utility model provides a muffle furnace has solved current muffle furnace when using, needs the operator to stretch into the furnace with the hand in order to get and put the crucible, though the operator generally has all worn thermal-insulated gloves, nevertheless because the inner space of muffle furnace is darker for the operator is getting when putting the crucible, has the technical problem of the risk of being scalded.

In order to achieve the above object, the utility model provides a following technical scheme:

a muffle furnace, which may essentially comprise: an outer furnace body, an inner furnace body and a hearth which are arranged in sequence from outside to inside.

The inner side of the outer furnace body is provided with a heat insulation layer.

The entry has been seted up to one side of outer furnace body, and the entrance is pegged graft and is had the furnace gate that matches with the entry, and the furnace gate passes through locking mechanism to be fixed at the entrance. A supporting rod is fixed in the middle of the furnace door, a supporting plate is fixed on the supporting rod, and a crucible frame is arranged on the supporting plate. An inserted bar with an I-shaped cross section is fixed at the lower part of the furnace door, a guide rail is arranged at the bottom of the furnace chamber, and the guide rail is provided with a jack matched with the inserted bar.

A heating mechanism for heating the crucible is arranged in the hearth.

A cooling channel is reserved between the outer furnace body and the inner furnace body and is connected with a cooling mechanism, and the cooling mechanism is used for accelerating the cooling of the hearth.

Through fixing the crucible frame on the furnace gate, combine the use of inserted bar and guide rail again for the operator only needs to take the furnace gate out a section distance when getting into the crucible, can arrange the crucible in on the crucible frame, and the operator need not stretch into furnace with the hand in, this has greatly reduced the risk that the operator was scalded. In addition, the arrangement of the inserted link and the guide rail ensures that the position of the crucible support in the hearth can be kept consistent every time an operator closes the furnace door. The cooling channel and the cooling mechanism are arranged, so that the temperature of the hearth can be accelerated, and the waiting time of an operator is reduced.

In some embodiments of the present invention, the locking mechanism includes a cushion block, a rotating plate, a rotating shaft, a nut, a rotating handle, a supporting frame, a screw rod, a pressing plate, and a rotating handle.

The rotating shaft is installed on the outer furnace body through a bearing, one end of the rotating plate is fixed on the rotating shaft, the cushion block is sleeved on the rotating shaft and is located between the rotating plate and the outer furnace body, the nut is in threaded connection with the rotating shaft, and the rotating plate is located between the nut and the cushion block.

The support frame is fixed in the rotating plate and keeps away from the one end of pivot, and the screw rod and support frame spiro union run through the rotating plate. The pressing plate is used for limiting the movement of the furnace door, the pressing plate is connected to the screw rod through a bearing, and the rotating handle is fixed at one end, far away from the furnace door, of the screw rod.

After the furnace door is closed, an operator can unscrew the nut through the rotating handle, the rotating plate rotates downwards under the action of self gravity, then the rotating handle is screwed, the pressing plate is pressed on the furnace door, and then the nut is screwed. When the furnace door needs to be opened, the rotating handle is reversely screwed to separate the pressing plate from the furnace door, the nut is unscrewed, the rotating plate is rotated upwards, and then the nut is screwed, so that the furnace door can be opened.

In some embodiments of the present invention, the heating mechanism includes a silicon carbide rod for heating.

In some embodiments of the present invention, the insertion rod and the guide rail are made of tungsten-molybdenum material.

In some embodiments of the present invention, the oven door is provided with a handle, and the handle is sleeved with a heat insulation sleeve.

The utility model discloses an in some embodiments, above-mentioned cooling body includes radiator fan and consecutive outlet pipe, water pump, cooling tube, wet return.

The cooling fan is fixed in the outside of outer furnace body, and the outlet pipe is located cooling fan's below, and the wet return is located cooling fan's top, has the solenoid valve on the outlet pipe, and outlet pipe and wet return all communicate with cooling channel.

The radiating pipe is positioned on the right side of the radiating fan and is spiral and provided with radiating fins.

When the hearth is required to be cooled, the electromagnetic valve is opened, water in the cooling channel flows in a circulating mode, water in the cooling channel flows into the radiating pipe with the radiating fins, and cooling is accelerated through the radiating fan.

In some embodiments of the present invention, a protective box is fixed on the outer furnace body, and the heat dissipation tube and the heat dissipation fan are located in the protective box. The protective box is communicated with a gas-collecting hood which is communicated with an exhaust pipe.

The arrangement of the protective box, the gas collecting hood and the exhaust pipe can exhaust hot gas emitted by the radiating pipe so as to reduce the temperature of a workshop.

In some embodiments of the present invention, the above-mentioned protection box is provided with a lighting lamp. A thermocouple is arranged in the hearth, and a temperature controller is arranged on the protective box. The output end of the thermocouple is electrically connected with the input end of the temperature controller, and the output end of the temperature controller is electrically connected with the control end of the electromagnetic valve.

The setting of light makes things convenient for the operator to operate when light condition is relatively poor. When the furnace chamber is required to be cooled, the temperature controller is powered on firstly, so that the temperature controller works normally, when the temperature detected by the thermocouple is higher than a preset value, the electromagnetic valve is opened by the temperature controller, and when the temperature detected by the thermocouple is lower than the preset value, the electromagnetic valve is closed by the temperature controller.

The embodiment of the utility model provides an at least, have following advantage or beneficial effect:

1. through fixing the crucible frame on the furnace gate, combine the use of inserted bar and guide rail again for the operator only needs to take the furnace gate out a section distance when getting into the crucible, can arrange the crucible in on the crucible frame, and the operator need not stretch into furnace with the hand in, this has greatly reduced the risk that the operator was scalded. In addition, the arrangement of the inserted link and the guide rail ensures that the position of the crucible support in the hearth can be kept consistent every time an operator closes the furnace door. The cooling channel and the cooling mechanism are arranged, so that the temperature of the hearth can be accelerated, and the waiting time of an operator is reduced.

2. When the hearth is required to be cooled, the electromagnetic valve is opened, water in the cooling channel flows in a circulating mode, water in the cooling channel flows into the radiating pipe with the radiating fins, and cooling is accelerated through the radiating fan.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a muffle furnace provided in an embodiment of the present invention;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

fig. 3 is a schematic structural view of an insert rod and a guide rail according to an embodiment of the present invention;

fig. 4 is a schematic structural view of the right side of the locking mechanism in fig. 1.

Icon: 11-outer furnace body, 111-inlet, 112-furnace door, 113-supporting rod, 114-supporting plate, 115-crucible holder, 116-inserted rod, 117-cooling channel, 118-handle, 119-heat insulation sleeve, 13-inner furnace body, 14-furnace chamber, 141-guide rail, 15-locking mechanism, 151-cushion block, 152-rotating plate, 153-rotating shaft, 154-nut, 155-rotating handle, 156-supporting frame, 157-screw rod, 158-pressing plate, 159-rotating handle, 171-radiating fan, 172-water outlet pipe, 174-water pump, 175-radiating pipe, 176-water return pipe, 177-radiating fin, 178-electromagnetic valve, 179-protective box, 181-gas collecting hood, 182-exhaust pipe and 183-illuminating lamp, 184-thermocouple, 185-temperature controller.

Detailed Description

In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the embodiments of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.

In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "bottom", "inner", "outer", and the like refer to orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the embodiments of the present invention.

In the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as fixed or detachable connections or as an integral part; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the embodiments of the present invention can be understood by those skilled in the art according to specific situations.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Example 1

Referring to fig. 1 to 4, the present embodiment provides a muffle furnace, which mainly includes: an outer furnace body 11, an inner furnace body 13 and a hearth 14 which are arranged in sequence from outside to inside.

The inner side of the outer furnace body 11 is provided with a heat insulating layer (not shown in the figure).

An inlet 111 is formed in one side of the outer furnace body 11, a furnace door 112 matched with the inlet 111 is inserted into the inlet 111, and the furnace door 112 is fixed at the inlet 111 through a locking mechanism 15. A support rod 113 is fixed in the middle of the furnace door 112, a support plate 114 is fixed on the support rod 113, and a crucible holder 115 is arranged on the support plate 114. An inserting rod 116 with an I-shaped cross section is fixed at the lower part of the oven door 112, a guide rail 141 is arranged at the bottom of the hearth 14, and the guide rail 141 is provided with a jack matched with the inserting rod 116.

A heating mechanism (not shown) for heating the crucible is provided in the furnace chamber 14.

A cooling channel 117 is reserved between the outer furnace body 11 and the inner furnace body 13, and the cooling channel 117 is connected with a cooling mechanism for accelerating the cooling of the hearth 14.

By fixing the crucible frame 115 on the furnace door 112 and combining the use of the insertion rod 116 and the guide rail 141, when an operator takes in and puts in a crucible, the operator only needs to draw out the furnace door 112 for a certain distance to place the crucible on the crucible frame 115, and the operator does not need to stretch hands into the hearth 14, so that the risk of scalding the operator is greatly reduced. In addition, the arrangement of the insertion rod 116 and the guide rail 141 enables the position of the crucible holder 115 within the firebox 14 to be maintained consistently each time the operator closes the door 112. The cooling channel 117 and the cooling mechanism are arranged to accelerate the cooling of the furnace 14 to reduce the waiting time of the operator.

Specifically, the method comprises the following steps:

the locking mechanism 15 includes a spacer block 151, a rotating plate 152, a rotating shaft 153, a nut 154, a rotating handle 155, a supporting frame 156, a screw 157, a pressing plate 158, and a rotating handle 159. The rotating shaft 153 is mounted on the outer furnace body 11 through a bearing, one end of the rotating plate 152 is fixed on the rotating shaft 153, the cushion block 151 is sleeved on the rotating shaft 153 and is positioned between the rotating plate 152 and the outer furnace body 11, the nut 154 is screwed on the rotating shaft 153, and the rotating plate 152 is positioned between the nut 154 and the cushion block 151. The supporting frame 156 is fixed on one end of the rotating plate 152 far away from the rotating shaft 153, and the screw 157 is screwed with the supporting frame 156 and penetrates through the rotating plate 152. The pressing plate 158 is used for limiting the movement of the oven door 112, the pressing plate 158 is connected to the screw 157 through a bearing, and the rotating handle 159 is fixed at one end of the screw 157 far away from the oven door 112.

After the door 112 is closed, the operator can unscrew the nut 154 through the rotating handle 155, rotate the rotating plate 152 downwards under the action of the self gravity, then unscrew the rotating handle 159, press the pressing plate 158 on the door 112, and then tighten the nut 154. When the door 112 needs to be opened, the rotating handle 159 is turned reversely to separate the pressing plate 158 from the door 112, the nut 154 is loosened to rotate the rotating plate 152 upward, and then the nut 154 is screwed to open the door 112.

The heating mechanism comprises a silicon carbide rod for heating. The inserted rod 116 and the guide rail 141 are both made of tungsten-molybdenum materials, so that the normal sliding of the inserted rod 116 is prevented from being influenced by thermal expansion and cold contraction when the inserted rod 116 and the guide rail 141 are made of different materials. The oven door 112 is provided with a handle 118, and the handle 118 is sleeved with an insulating sleeve 119.

The cooling mechanism includes a heat dissipation fan 171, and a water outlet pipe 172, a water pump 174, a heat dissipation pipe 175, and a water return pipe 176 connected in sequence. The heat dissipation fan 171 is fixed on the outer side of the outer furnace body 11, the water outlet pipe 172 is located below the heat dissipation fan 171, the water return pipe 176 is located above the heat dissipation fan 171, the electromagnetic valve 178 is arranged on the water outlet pipe 172, and the water outlet pipe 172 and the water return pipe 176 are both communicated with the cooling channel 117. The heat pipe 175 is located at the right side of the heat dissipating fan 171, and the heat pipe 175 is spiral and has heat dissipating fins 177. When the temperature of the furnace 14 needs to be lowered, the electromagnetic valve 178 is opened to circulate the water in the cooling passage 117, and the water in the cooling passage 117 flows into the heat dissipating pipe 175 having the heat dissipating fins 177, so that the temperature is lowered by the heat dissipating fan 171.

A shield 179 is fixed to the outer body 11, and the heat dissipating pipe 175 and the heat dissipating fan 171 are located in the shield 179. The guard box 179 is connected with a gas-collecting hood 181, and the gas-collecting hood 181 is connected with an exhaust pipe 182. The protection box 179, the gas collecting hood 181 and the exhaust pipe 182 are disposed to exhaust the hot air emitted from the heat dissipating pipe 175, thereby reducing the temperature of the workshop.

An illumination lamp 183 is mounted on the shield 179. A thermocouple 184 is arranged in the hearth 14, and a temperature controller 185 is arranged on the protective box 179. The output end of the thermocouple 184 is electrically connected with the input end of the temperature controller 185, and the output end of the temperature controller 185 is electrically connected with the control end of the solenoid valve 178. The setting of light 183 makes things convenient for the operator to operate when light condition is relatively poor. When the temperature of the hearth 14 needs to be reduced, the temperature controller 185 is powered on first, so that the temperature controller 185 works normally, when the temperature detected by the thermocouple 184 is higher than a preset value, the temperature controller 185 opens the electromagnetic valve 178, and when the temperature detected by the thermocouple 184 is lower than the preset value, the temperature controller 185 closes the electromagnetic valve 178.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A muffle furnace is characterized by comprising an outer furnace body, an inner furnace body and a hearth which are sequentially arranged from outside to inside;

a heat insulation layer is arranged on the inner side of the outer furnace body;

an inlet is formed in one side of the outer furnace body, a furnace door matched with the inlet is inserted into the inlet, and the furnace door is fixed at the inlet through a locking mechanism; a support rod is fixed in the middle of the furnace door, a support plate is fixed on the support rod, and a crucible frame is arranged on the support plate; an inserted bar with an I-shaped cross section is fixed at the lower part of the furnace door, a guide rail is arranged at the bottom of the furnace chamber, and the guide rail is provided with an insertion hole matched with the inserted bar;

a heating mechanism for heating the crucible is arranged in the hearth;

2. The muffle of claim 1, wherein the locking mechanism comprises a spacer block, a rotating plate, a rotating shaft, a nut, a rotating handle, a support frame, a screw, a pressure plate and a rotating handle;

the rotating shaft is installed on the outer furnace body through a bearing, one end of the rotating plate is fixed on the rotating shaft, the cushion block is sleeved on the rotating shaft and is positioned between the rotating plate and the outer furnace body, the nut is in threaded connection with the rotating shaft, and the rotating plate is positioned between the nut and the cushion block;

the support frame is fixed at one end of the rotating plate far away from the rotating shaft, and the screw is in threaded connection with the support frame and penetrates through the rotating plate; the pressing plate is used for limiting the movement of the furnace door, the pressing plate is connected to the screw rod through a bearing, and the rotating handle is fixed at one end, far away from the furnace door, of the screw rod.

3. The muffle of claim 1 wherein the heating mechanism comprises a silicon carbide rod for heating.

4. The muffle of claim 1 wherein the bayonet and the rail are both made of tungsten molybdenum.

5. The muffle of claim 1, wherein a handle is provided on the door, and a heat insulating sleeve is sleeved on the handle.

6. The muffle furnace of any one of claims 1-5, wherein the cooling mechanism comprises a cooling fan, and a water outlet pipe, a water pump, a cooling pipe and a water return pipe which are connected in sequence;

the cooling fan is fixed on the outer side of the outer furnace body, the water outlet pipe is positioned below the cooling fan, the water return pipe is positioned above the cooling fan, the water outlet pipe is provided with an electromagnetic valve, and the water outlet pipe and the water return pipe are both communicated with the cooling channel;

the radiating pipe is located cooling fan's right side, the radiating pipe is the heliciform and has radiating fin.

7. The muffle of claim 6, wherein a protective box is fixed on the outer furnace body, and the heat dissipation pipe and the heat dissipation fan are positioned in the protective box; the protective box is communicated with a gas-collecting hood, and the gas-collecting hood is communicated with an exhaust pipe.

8. The muffle of claim 7 wherein an illumination lamp is mounted to the protective housing; a thermocouple is arranged in the hearth, and a temperature controller is arranged on the protective box; the output end of the thermocouple is electrically connected with the input end of the temperature controller, and the output end of the temperature controller is electrically connected with the control end of the electromagnetic valve.