TWI906091B - Pre-heating furnace and pre-heating equipment - Google Patents

Abstract

A pre-heating furnace includes a furnace body, an air-outlet unit, a blocking member, and a driving unit. The testing room of the furnace body is adapted for the low-temperature gas to flow into, and the gas further enters the air-outlet channel. The box of the air-outlet unit is arranged at the furnace body, and the channel of the box is disposed with a pivotable valve to open or close the channel. The blocking member has a first face and a second face. The first face is located at the exterior periphery of the valve, and the second face faces the inner wall of the box. The driving unit has a support portion at the exterior periphery of the valve to support the blocking member. The driving unit can drive the blocking member to move along a first axis so that the second face abuts against the inner wall of the box to ensure the gas in the channel of the box may not leak.

Description

Pre-fired furnace body and pre-fired equipment

This invention provides a pre-burning furnace body that effectively prevents leakage and condensation of test gases, thereby improving the quality of pre-burning tests.

Currently, referring to Figure 1, after multiple electronic components are manufactured, if a longer testing period is required, manufacturers use pre-burning equipment to perform the testing. The pre-burning furnace 11 of the pre-burning equipment has a test chamber 111 inside. The test chamber 111 is equipped with a support 112 to hold the test module 20 containing the electronic component under test and test sockets. An air inlet duct 12 and an air outlet duct 13 are provided above the pre-burning furnace 11. The air inlet duct 12 delivers test gas with a preset low temperature to the test chamber 111 of the pre-burning furnace 11, thus testing the electronic components of the test module 20. When the component performs cold testing, the air outlet duct 13 is equipped with a rotatable valve 14 to control its opening and closing. During cold testing, the valve 14 rotates to a horizontal position to close the air outlet duct 13. After the cold testing is completed, the valve 14 rotates to a vertical position to open the air outlet duct 13 to discharge the test gas and allow the test chamber 111 of the pre-burning furnace body 11 to warm up, so as to facilitate the testing of different batches of electronic components.

However, to ensure smooth rotation of the valve 14 within the air outlet duct 13 for opening and closing, the manufacturer has a rotational tolerance distance L between the outer surface of the valve 14 and the inner wall of the air outlet duct 13 to prevent interference and wear during valve rotation. However, this rotational tolerance distance L not only causes leakage of low-temperature test gas, affecting the test temperature, but also necessitates the injection of more low-temperature test gas, thus increasing temperature control energy costs. Furthermore, leakage of low-temperature test gas through the rotational tolerance distance L easily leads to condensation in the air outlet duct 13, causing condensate droplets to fall into the test chamber 111, thereby affecting the quality of cold testing and damaging components of the test equipment.

The first objective of this invention is to provide a pre-firing furnace body, comprising a furnace body, an air outlet unit, at least one baffle, and an actuating unit. The furnace body has a test chamber and an air outlet channel. The test chamber is for receiving test gas with a preset temperature, and the air outlet channel is for receiving test gas discharged from the test chamber. The air outlet unit has a housing and a valve. The housing is mounted on the furnace body and has a passage communicating with the air outlet channel. The valve is sway-mounted on the housing and can open and close the passage. The at least one baffle defines at least one first face and at least one second face on its outer surface. The first face is located on one of the outer ring of the valve and the inner wall of the housing, and the second face faces the outer ring of the valve and the inner wall of the housing. The actuator has a support portion on one of the outer ring of the valve and the inner wall of the enclosure for supporting the stop member, and is provided with at least one actuator capable of driving the stop member to move along the first axis, so that the second surface of the stop member is in contact with or detached from the outer ring of the valve and the inner wall of the enclosure; thereby, when the valve is swung to a horizontal state, the actuator of the actuator unit can drive the second surface of the stop member to fit against one of the outer ring of the valve or the inner wall of the enclosure, thereby effectively sealing the passage of the enclosure, so as to effectively prevent the leakage of test gas during the test process, thereby ensuring the stability of the test temperature and saving temperature control energy costs.

The second objective of this invention is to provide a pre-burning furnace body, wherein the actuating unit can drive the second surface of the stop to abut against either the outer ring of the valve or the inner wall of the enclosure, so as to effectively seal the passage of the enclosure and thereby effectively prevent the test gas from condensing in the passage, so as to avoid the condensation water droplets damaging the internal components of the furnace body, thus achieving cost-saving performance.

The third objective of this invention is to provide a preheating furnace body, wherein the actuation unit can drive the stop to detach from either the outer ring of the valve or the inner wall of the enclosure. After testing, this facilitates smooth valve swing and avoids damage to the second surface of the stop, thereby improving performance and saving costs.

The fourth objective of this invention is to provide a pre-burning device, comprising a pre-burning furnace body, at least one exhaust fan, at least one support frame, and at least one test controller. The pre-burning furnace body includes a furnace body, an air outlet unit, at least one baffle, and an actuation unit for accommodating the test piece and preventing leakage and condensation of the test gas. At least one exhaust fan is installed in the pre-burning furnace body to deliver test gas with a preset temperature to the air inlet channel of the pre-burning furnace body. At least one support frame is disposed in the test chamber of the pre-burning furnace body for holding the test piece. At least one test controller is installed in the pre-burning furnace body for electrically connecting the test piece to perform test operations.

To enable your review committee to gain a further understanding of this invention, a preferred embodiment is provided below with accompanying drawings:

Please refer to Figures 2 to 4. The pre-firing equipment includes the pre-firing furnace body of the present invention, at least one exhaust fan, at least one support frame and at least one test controller (not shown in the figure).

The preheating furnace body includes the furnace body 31, the air outlet unit, at least one stop and the actuation unit.

The furnace body 31 is provided with at least one test chamber 311 and at least one air outlet duct. The test chamber 311 is for the inflow of test gas with a preset temperature, and the air outlet duct is for the inflow of test gas discharged from the test chamber 311.

The furnace body 31 further includes at least one air inlet channel 312 and at least one air inlet duct 313. The air inlet channel 312 is connected to the test chamber 311 for the flow of test gas, and the air inlet duct 313 is for the input of test gas to the air inlet channel 312.

Depending on the operational requirements, the test gas may be a low-temperature test gas or a high-temperature test gas.

In this embodiment, a test chamber 311 is provided inside the furnace body 31. The test chamber 311 has a closed top plate 3113 between two opposing first side plates 3111 and second side plates 3112. The first side plate 3111 has a plurality of air inlets 3114 for the flow of test gas, and the second side plate 3112 has a plurality of air outlets 3115 for the flow of test gas. The air inlet channel 312 is located on one side of the test chamber 311 of the furnace body 31 and communicates with the air inlets 3114 of the first side plate 3111, so that the test gas flows into the test chamber 311 from the air inlet channel 312, so that the test chamber 311 forms a temperature environment that simulates the future application of the test piece. An air inlet duct 313 is installed on the top surface of the furnace body 31. One end of the duct is connected to a test gas supply device (not shown in the figure), and the other end is connected to an air inlet channel 312 to allow test gas with a preset temperature to be input into the air inlet channel 312. An air outlet channel 314 is located on the other side of the test chamber 311 of the furnace body 31 and is connected to the air outlet 3115 of the second side plate 3112 to allow test gas discharged from the test chamber 311 to flow into it.

The air outlet unit includes a housing 32 and a valve 33; the housing 32 is mounted on the furnace body 31 and has a channel 321 that communicates with the air outlet passage 314; the valve 33 is mounted on the housing 32 in a swing manner and can open or close the channel 321 of the housing 32.

As described above, the air outlet unit is equipped with at least one drive in the housing 32, which can drive the valve 33 to swing displacement. Furthermore, the drive can be a direct-drive motor, a rotary cylinder, or a combination of a motor and a transmission assembly.

In this embodiment, the enclosure 32 is mounted on the top surface of the furnace body 31 and has an internal channel 321 that connects to the air outlet channel 314 of the furnace body 31 to discharge test gas after testing. A valve 33 is disposed in the channel 321 of the enclosure 32. The actuator is a rotary cylinder 34, which is also mounted on the enclosure 32. The rotating shaft 341 of the rotary cylinder 34 passes through the channel 321 of the enclosure 32 and connects to one side of the valve 33, causing the rotary cylinder 34 to rotate and swing the valve 33 to a horizontal or vertical position, thereby opening or closing the channel 321 of the enclosure 32. Alternatively, the actuator can also drive the valve 33 to swing at a desired angle.

At least one stopper 35 defines at least one first face 351 and at least one second face 352 on its outer surface. The first face 351 is located on one of the outer ring portion 331 of the valve 33 and the inner wall surface 322 of the housing 32, and the second face 352 faces the other of the outer ring portion 331 of the valve 33 and the inner wall surface 322 of the housing 32.

Depending on operational requirements, for example, the first facet 351 of the stop member 35 may be located on the outer ring portion 331 of the valve 33, and when the valve 33 is in a horizontal position, the stop member 35 may protrude outwards, with the second facet 352 abutting against the inner wall surface 322 of the housing 32, thereby closing the passage 321. Alternatively, for example, the first facet 351 of the stop member 35 may be located on the inner wall surface 322 of the housing 32, and when the valve 33 is in a horizontal position, the stop member 35 may protrude outwards, with the second facet 352 abutting against the outer ring portion 331 of the valve 33, thereby closing the passage 321. Therefore, this embodiment is not limited to this specific embodiment.

In this embodiment, the stop member 35 is made of elastic material and has a first face 351 and a second face 352 defined on its outer surface, and a third face 353 defined on its bottom surface. The first face 351 of the stop member 35 is located on the outer ring portion 331 of the valve 33, and the second face 352 faces the inner wall surface 322 of the box 32.

The actuation unit has a support portion 332 on one of the outer ring portion 331 of the valve 33 and the inner wall surface 322 of the housing 32 for supporting the stop member 35, and is provided with at least one actuator capable of driving the stop member 35 to move along the first axis X, so that the second surface 352 of the stop member 35 fits against or separates from the other of the outer ring portion 331 of the valve 33 and the inner wall surface 322 of the housing 32, so as to ensure the airtight passage 321 or facilitate the swing displacement of the valve 33.

Depending on the operational requirements, the actuator may be at least one delivery pipe, a pressure cylinder, or include both a delivery pipe and a conduit, and is not limited to this embodiment.

According to the operation requirements, the actuator can provide a recessed support portion 332 on the outer ring portion 331 of the valve 33 along the first axis X to accommodate the stop member 35. The first surface portion 351 of the stop member 35 and the support portion 332 form an air chamber. The actuator includes at least one delivery pipe, which can supply or evacuate air to the air chamber to drive the stop member 35 to move along the first axis X at the support portion 332.

According to the operation requirements, the actuator has a recessed support portion on the inner wall surface 322 of the housing 32 along the first axis X to accommodate the stop member 35. The first surface 351 of the stop member 35 and the support portion form an air chamber. The actuator includes at least one delivery pipe that can supply or evacuate air to the air chamber to drive the stop member 35 to move along the first axis X at the support portion.

As described above, the actuator includes a conduit and a delivery pipe. The conduit is connected to the air chamber, and the delivery pipe is connected to the conduit, enabling the supply or extraction of air to the air chamber. For example, the actuator may have a conduit on one of the valve 33 and the housing 32. One end of the conduit is connected to the air chamber, and the other end is connected to the delivery pipe, allowing the delivery pipe to perform the operation of filling or evacuating air from the air chamber via the conduit.

As described above, the actuator includes a conduit and a delivery pipe. The conduit is used to house the delivery pipe, which is capable of supplying or evacuating air to the air chamber. For example, the actuator may have a conduit on one of the valve 33 and the housing 32. The conduit is used to house the delivery pipe, and one end of the delivery pipe is connected to the air chamber, so that the delivery pipe can perform the operation of filling or evacuating air to the air chamber through the conduit.

As described above, the bottom surface of the supporting part is attached to the third surface 353 of the stop 35.

As described above, the actuating unit provides a limiting structure between the supporting part and the stop member 35 to prevent the stop member 35 from detaching from the supporting part. Furthermore, the limiting structure is provided with at least one limiting component that can limit the displacement of the stop member 35 to a first position or a second position; the first position can be the retracted position of the stop member 35, and the second position can be the airtight position of the stop member 35.

As described above, the limiting structure has at least one limiting component in the supporting part and/or the stop member 35.

For example, the limiting structure has a limiting component that is a stepped surface on the inner side of the supporting part.

For example, the limiting structure has a first limiting member that serves as a blocking surface on the outer side of the supporting part, and a second limiting member that serves as a top abutting surface on the stop member 35. The stop member 35 moves outward along the first axis X. The limiting structure uses the top abutting surface of the stop member 35 to abut against the blocking surface of the supporting part to prevent the stop member 35 from falling off the supporting part.

For example, the limiting structure has a first limiting component and a second limiting component that cooperate with each other between the top surface and/or bottom surface of the supporting part and the stop member 35. The first limiting component and the second limiting component can be a sliding groove and a sliding block that cooperate with each other to prevent the stop member 35 from falling off the supporting part.

For example, the limiting structure has a limiting member that is elastic between the supporting part and the first surface 351 of the stop member 35, so that the stop member 35 can elastically protrude outward and retract inward to return to its original position.

The above designs can prevent the stop 35 from detaching from the support, and therefore are not limited to this embodiment.

In this embodiment, the actuating unit includes a support portion, an actuator, and a limiting structure. The actuating unit has a support portion 332, which is a groove, located inwardly along the first axis X on the outer ring portion 331 of the valve 33 to accommodate the stop member 35. The bottom surface 3321 of the support portion 332 abuts against the third surface 353 of the stop member 35. An air chamber 333 is formed between the support portion 332 and the first surface 351 of the stop member 35. The limiting structure has a first limiting member, which is a first stop surface 3322, on the outer side of the support portion 332, and a second limiting member, which is a stepped abutment surface 354, on the stop member 35. The support portion 332... The inner side is provided with a second limiting component that serves as a second stop surface 3323; the actuator includes a pipe 334 and a delivery pipe 335. The pipe 334 is located on the valve 33, with one end connected to the air chamber 333 and the other end connected to the bottom surface 336 of the valve 33. One end of the delivery pipe 335 is connected to the pipe 334, and the other end is connected to a driving gas supply device (not shown in the figure). When the delivery pipe 335 draws in or fills the air chamber 333 with driving gas, the stop 35 can be displaced along the first axis X within the support portion 332 to the first position A1 or the second position A2, so as to detach from or abut against the inner wall surface 322 of the box 32.

According to operational requirements, another embodiment of the actuation unit may also provide an L-shaped groove support portion on the outer ring portion 331 of the valve 33 for supporting the stop member 35. The actuator includes a power source and a transmission component. The power source can drive the transmission component, and the transmission component is connected to the first face portion 351 of the stop member 35 to drive the stop member 35 to move along the first axis X.

For example, as shown in Figure 10, the actuating unit has an L-shaped groove support portion 337 on the outer ring portion 331 of the valve 33 for supporting the stop member 35. The third part 353 of the stop member 35 is in contact with the bottom surface 3371 of the support portion 337. The actuator includes a power source and a transmission component. The power source is a pressure cylinder 3381, which is mounted on the top surface of the valve 33. The pressure cylinder 3381 is connected to the first part 351 of the stop member 35 by the transmission component 3382, so as to drive the stop member 35 to move along the first axis X on the support portion 337 to the first position A1 (i.e., the retracted position) or the second position A2 (i.e., the airtight position), and detach from or push against the inner wall surface 322 of the box 32. Furthermore, a limiting structure is provided on the inner side of the supporting part 337 as a limiting member 3372. When the pressing cylinder 3381 drives the blocking member 35 to move inward through the transmission member 3382, so that the first part 351 of the blocking member 35 abuts against the blocking member 3372 of the supporting part 337, the blocking member 35 is in the first position A1 (i.e., the retracted position) and is separated from the inner wall surface 322 of the box 32. Conversely, when the pressing cylinder 3381 drives the blocking member 35 to move outward through the transmission member 3382, so that the second part 352 of the blocking member 35 is in the second position A2 (i.e., the airtight position) and abuts against the inner wall surface 322 of the box 32, the passage 321 of the airtight box 32 can be secured.

Depending on the operational requirements, the pre-fired furnace body may include at least one temperature control unit (not shown in the figure) for temperature control of the gas used for testing.

At least one exhaust fan 40 is installed in the pre-calcining furnace body to draw test gas with a preset temperature into the air inlet channel 312 of the pre-calcining furnace body. Furthermore, the exhaust fan 40 can be installed in the furnace body 31 of the pre-calcining furnace body or in the air inlet pipe 313, as long as the test gas is drawn into the air inlet channel 312, and is not limited to this embodiment. In this embodiment, the exhaust fan 40 is installed in the furnace body 31 of the pre-calcining furnace body to draw the test gas input from the air inlet pipe 313 into the air inlet channel 312.

At least one support 50 is disposed in the test chamber 311 of the pre-burning furnace body for holding the test piece. Furthermore, the support 50 can be a fixed frame or a movable frame. For example, the support 50 is a movable transport trolley for moving into or out of the test chamber 311 of the pre-burning furnace body. For example, the support 50 is a fixed frame mounted on the test chamber 311 of the furnace body 31. In this embodiment, a plurality of supports 50 are disposed in a relatively fixed manner on the first side plate 3111 and the second side plate 3112 of the furnace body 31 for holding a plurality of test pieces.

At least one test controller (not shown) is installed in the furnace body 31 of the pre-burning furnace body to provide electrical connection to the test device (e.g., test module) to perform test operations.

Please refer to Figures 5 to 7. The device under test is a test module 60 with multiple test sockets and electronic components. Open the door panel of the furnace body 31 (not shown in the figure), place the multiple test modules 60 under test on the multiple layers of the support frame 50 of the furnace body 31, and electrically connect them to the test controller (not shown in the figure), which is located in the test chamber 311 of the furnace body 31. Close the door panel.

The test gas supply equipment (not shown) of the pre-burning equipment delivers test gas with a preset low temperature to the air inlet duct 313, and the low temperature test gas is drawn to the air inlet channel 312 of the furnace body 31 by the exhaust fan 40. The low temperature test gas in the air inlet channel 312 flows into the test chamber 311 through the air inlet 3114, so that the test chamber 311 forms a low temperature environment that simulates the future application of electronic components, so that the electronic components of the test module 60 can perform cold testing in the test chamber 311.

The low-temperature test gas in the test chamber 311 of the furnace body 31 flows into the air outlet 314 through the air outlet 3115. Since the rotary cylinder 34 of the air outlet unit drives the valve 33 to be horizontally positioned by the rotating shaft 341, the actuating unit charges the driving gas into the air chamber 333 of the receiving part 332 through the pipeline 334 via the delivery pipe 335, so as to apply a thrust to the first surface 351 of the stop member 35, thereby driving the stop member 35 to move outward along the first axis X at the receiving part 332, and the top of the stop member 35 abuts against the gas outlet 314. When the surface 354 abuts against the first blocking surface 3322 of the supporting part 332, the second surface 352 of the blocking member 35 is located at the second position A2 and abuts against and adheres to the inner wall surface 322 of the enclosure 32, thereby effectively sealing the channel 321 of the enclosure 32. This effectively prevents the low-temperature test gas of the air outlet 314 from leaking out through the channel 321 of the enclosure 32, and also prevents the low-temperature test gas from condensing at the channel 321, so that the test chamber 311 maintains the preset low-temperature test environment and achieves improved test quality performance.

Please refer to Figures 3, 4, 8 and 9. After the cold test is completed, depending on the operation requirements, the rotary cylinder 34 can be directly driven by the rotating shaft 341 to swing the valve 33 to a vertical position, thereby opening the passage 321 of the housing 32; or the delivery pipe 335 of the actuation unit can draw driving gas from the air chamber 333 of the receiving part 332, thereby drawing the driving stop 35 away from the inner wall surface 322 of the housing 32, so as to facilitate the smooth swing of the valve 33 and avoid damage to the second surface 352 of the stop 35, thereby opening the passage 321 of the housing 32. Therefore, it is not limited to this embodiment.

In this embodiment, the delivery pipe 335 of the actuating unit draws driving gas from the air chamber 333 of the receiving part 332 via the pipe 334, thereby generating a suction force on the first surface 351 of the stop member 35. This suction drives the stop member 35 to move inward along the first axis X at the receiving part 332. When the first surface 351 of the stop member 35 abuts against the second stop surface 3323 of the receiving part 332, The second face 352 of the stop 35 is located at the first position A1 and is detached from the inner wall 322 of the enclosure 32; the air outlet unit can drive the valve 33 to swing vertically by rotating the shaft 341 of the cylinder 34 to smoothly open the channel 321 of the enclosure 32, so that the low-temperature test gas of the air outlet channel 314 of the furnace body 31 can be discharged outward through the channel 321 to facilitate the temperature recovery of the test chamber 311.

[Xi Zhi]

11: Pre-fired furnace body

111: Testing Room

112: Support frame

20: Test Module

12: Air Inlet Duct

13: Air outlet duct

14: Valves

20: Test Module

L: Rotational tolerance distance

[This invention]

31: Furnace Body

311: Testing Room

3111: First side panel

3112: Second side panel

3113: Roof

3114: Air Inlet

3115: Air vent

312: Entering the Wind Flow Path

313: Air Inlet Duct

314: Evasion Stream

32: Boxes and Cases

321: Channel

322: Inner wall surface

33: Valve

331: Outer Ring

332: Delivery Department

3321: Bottom surface

3322: First Block

3323: Second Baffle

333: Air Chamber

334: Pipeline

335: Conveyor Pipe

336: Bottom surface

337: Delivery Department

3371: Bottom surface

3372: Shield

3381: Cylinder

3382: Transmission Components

37: Rotary Cylinder

341: Rotary Shaft

35: Stopper

351: First Face

352: Second Face

353: Third Face

354: Top and bottom surfaces

X: First axis

A1: First position

A2: Second position

40: Exhaust fan

50: Support frame

60: Test Module

Figure 1: Partial schematic diagram of a conventional pre-calcining device. Figure 2: Partial schematic diagram of the pre-calcining furnace body of the present invention applied to a pre-calcining device. Figure 3: Schematic diagram of the air outlet unit, baffle, and actuation unit. Figure 4: Enlarged partial schematic diagram of Figure 3. Figures 5 to 9: Schematic diagrams of the pre-calcining furnace body in use. Figure 10: Schematic diagram of another embodiment of the actuation unit.

32: Boxes and Cases

321: Channel

322: Inner wall surface

33: Valve

331: Outer Ring

332: Delivery Department

3321: Bottom surface

3322: First Block

3323: Second Baffle

333: Air Chamber

334: Pipeline

335: Conveyor Pipe

336: Bottom surface

35: Stopper

351: First Face

352: Second Face

353: Third Face

354: Top and bottom surfaces

X: First axis

A1: First position

A2: Second position

Claims (10)

A pre-firing furnace body, comprising: A furnace body: having at least one test chamber and at least one air outlet duct, the test chamber for receiving a test gas having a preset temperature, and the air outlet duct for receiving the test gas discharged from the test chamber; An air outlet unit: having a housing and a valve, the housing being mounted on the furnace body and having a passage communicating with the air outlet duct, the valve being swayably mounted on the housing and capable of opening and closing the passage; At least one stop member: defining at least one first facet and at least one second facet on its outer surface, the first facet being located on one of the outer ring of the valve and the inner wall surface of the housing, and the second facet facing the other of the outer ring of the valve and the inner wall surface of the housing; Actuation unit: A receiving portion is provided on one of the outer ring of the valve and the inner wall surface of the housing to receive the stop member, and at least one actuator is provided to drive the stop member to move along a first axis, so that the second surface of the stop member is in contact with or detached from one of the outer ring of the valve and the inner wall surface of the housing. As described in claim 1, the pre-fired furnace body has an air outlet unit within the enclosure equipped with at least one drive capable of driving the valve to swing displacement. As described in claim 1, the pre-fired furnace body has an actuation unit with a recessed receiving portion along the first axis on the outer circumference of the valve for accommodating the stop member. A gas chamber is formed between the first surface of the stop member and the receiving portion. The actuator includes at least one delivery pipe capable of supplying or evacuating gas from the gas chamber to drive the stop member to displace along the first axis at the receiving portion. As described in claim 1, in the pre-fired furnace, the actuation unit has a recessed receiving portion along the first axis on the inner wall surface of the housing for accommodating the stop member. A gas chamber is formed between the first surface of the stop member and the receiving portion. The actuator includes at least one delivery pipe capable of supplying or evacuating air from the gas chamber to drive the stop member to displace along the first axis at the receiving portion. As described in claim 1, the pre-fired furnace body has an actuation unit with an L-shaped groove on the outer ring of the valve for receiving the stop member. The actuator includes a power source and a transmission component. The power source drives the transmission component, which is connected to the first facet of the stop member to displace the stop member along the first axis. As described in claim 3 or 4, the actuator of the pre-fired furnace includes a conduit and a delivery pipe, the conduit communicating with the gas chamber, and the delivery pipe communicating with the conduit, thereby enabling the supply or extraction of gas from the gas chamber. As described in claim 3 or 4, the actuator of the pre-fired furnace includes a conduit and a delivery pipe, the conduit for accommodating the delivery pipe, which communicates with the gas chamber and is capable of supplying or evacuating the gas chamber. The pre-burning furnace body as described in any of claims 1 to 5 has an actuation unit with a limiting structure between the support portion and the stop member to prevent the stop member from detaching from the support portion. The pre-fired furnace body as described in claim 1, wherein the furnace body has at least one air inlet channel and at least one air inlet duct, the air inlet channel communicating with the test chamber for the inflow of the test gas, and the air inlet duct for the input of the test gas to the air inlet channel. A pre-calcination apparatus, comprising: at least one pre-calcination furnace body as described in claim 9; at least one exhaust fan: mounted on the pre-calcination furnace body for supplying test gas having a preset temperature to the air inlet channel of the pre-calcination furnace body; at least one support: disposed in the test chamber of the pre-calcination furnace body for holding at least one test piece; at least one test controller: mounted on the pre-calcination furnace body for electrically connecting to the test piece to perform test operations.