CN217330652U

CN217330652U - Sintering furnace heat-generating body structure

Info

Publication number: CN217330652U
Application number: CN202221241143.8U
Authority: CN
Inventors: 欧鹏; 崔志文; 柴神洲; 刘建辉
Original assignee: Hunan Weishang Technology Co ltd
Current assignee: Hunan Weishang Technology Co ltd
Priority date: 2022-05-23
Filing date: 2022-05-23
Publication date: 2022-08-30
Anticipated expiration: 2032-05-23

Abstract

The utility model relates to the technical field of heating structures of sintering furnaces, and discloses a heating body structure of a sintering furnace, which comprises a bottom heating area and a side heating area positioned above the bottom heating area; the bottom heating area comprises a plurality of lower heating rods which are connected in series and in parallel and are electrically communicated, one end of each lower heating rod is communicated with an electricity inlet electrode for supplying electricity to the bottom heating area, the other end, opposite to the electricity inlet electrode, of each lower heating rod is provided with a non-electricity inlet support electrode for supporting the bottom heating area, the lower heating rods are electrified through the electricity inlet electrodes, and currents form series and parallel current loops in the lower heating rods; the side heating area is provided with a plurality of side heating rods which are electrically communicated in parallel. The heating power in each district can be adjusted to this scheme, and the lower heating rod in the district that generates heat of bottom simultaneously carries the ability reinforce, and effective heating area is big, and the heating is even.

Description

Sintering furnace heating body structure

Technical Field

The utility model relates to a fritting furnace heat-generating body structure belongs to fritting furnace heating structure technical field.

Background

The sintering furnace heats and sinters metal, ceramic or some refractory metal intermediate compound powder in vacuum and protective atmosphere to obtain a dense body material with certain density and certain mechanical property. The sintering furnace mainly comprises a vacuum air pressure sintering furnace, a discharge plasma sintering furnace and the like. The vacuum air pressure sintering furnace combines vacuum, high pressure and high temperature sintering together, and is widely applied to sintering and molding of various anti-oxidation materials in the fields of powder metallurgy and vacuum diffusion welding. The vacuum sintering furnace comprises a heating body structure used for heating the sintering furnace. The following patents in the prior art relate to the heating element structure of a sintering furnace:

1. the patent publication is "CN 215572200U", and the patent name is the utility model discloses a utility model patent of "integrative stove heat-generating body structure of degrease sintering" discloses an integrative stove heat-generating body structure of degrease sintering, including six electrodes, six electrodes are constituteed by leading electrical pillar and support frame, all are provided with the heating rod that a plurality of equidistance distributed on the support frame, the heating rod leads electrical connection with what correspond, and the both ends of heating rod all are provided with the busbar, and the junction of heating rod and busbar all is provided with solid fixed ring, and the spliced eye has all been seted up to the one end of leading electrical pillar. The utility model discloses a six electrodes through setting up constitute series structure to twenty four heating rods to through electrode and two transformer electric connection, two electrode short circuits in the middle of the rethread, can form the heating interval of two independent work from top to bottom, be convenient for heat respectively, conveniently satisfy the requirement of stove interior temperature homogeneity. However, the patent has the following problems:

1) the heating rods in the patent are in a linear layout, the heating rods in the linear layout are mostly hollow heating rods, the resistance value is large, the number of the heating rods is small, the surface load of a single heating rod is large, the loading capacity is weak, the heating rods are easy to break, and the service life of the heating rods is limited;

2) the effective heating area of the heating rod in the linear layout is limited, and the heating stability and uniformity are poor;

3) when the heating rod expands and lengthens in the heating process, the heating rod in the linear layout and the power feeding connecting piece are easy to cause arc striking due to poor contact, so that the heating rod is damaged.

2. The patent publication is "CN 215810214U", the patent name is the utility model patent of "a fritting furnace gate heat-generating body device", a fritting furnace gate heat-generating body device is disclosed, the pole that generates heat that this fritting furnace gate heat-generating body device set up is through connecting left electric frame, right electric frame, lower electric frame realizes the electricity with each connecting seat and is connected, vice electric frame realizes the electricity with the vice pole that generates heat of inboard setting equally and is connected, the clamping frame of this fritting furnace gate heat-generating body device inboard setting is used for treating the heating product and carries out spacing support, avoid treating each heater bar of heating product direct contact and each vice heater bar, thereby cause the damage of the product of waiting to heat. However, this heat generator device has the following problems: the left electric frame and the right electric frame are separated, and thrust can be generated when the heating rod expands and becomes long to cause the left electric frame and the right electric frame to be inclined, so that the service life of the heating body is influenced.

To sum up, how to arrange a heating performance stability, long service life, but sintering furnace heat-generating body of subregion regulation heating power simultaneously is the problem that needs to solve now urgently.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a fritting furnace heat-generating body structure, the power of generating heat in adjustable each district, the lower heating rod area that the electric intercommunication was gone up in cluster, parallelly connected in the district that generates heat in bottom simultaneously carries the ability reinforce, and effective heating area is big, and the heating is even.

In order to achieve the above object, the utility model provides a following technical scheme: a sintering furnace heating element structure comprises a bottom heating area and a side heating area positioned above the bottom heating area; the bottom heating area comprises a plurality of lower heating rods which are connected in series and in parallel and are electrically communicated, one end of each lower heating rod is communicated with an electricity inlet electrode for supplying electricity to the bottom heating area, the other end, opposite to the electricity inlet electrode, of each lower heating rod is provided with a non-electricity inlet support electrode for supporting the bottom heating area, the lower heating rods are electrified through the electricity inlet electrodes, and currents form series and parallel current loops in the lower heating rods; the side heating area is provided with a plurality of side heating rods which are electrically connected in parallel.

Preferably, the end parts of the lower heating rods, which are positioned at one end of the power feeding electrode, are uniformly connected with two front connecting frames, namely a left front connecting frame positioned at the left side and a right front connecting frame positioned at the right side; the left front connecting frame and the right front connecting frame are fixedly connected with the power feeding electrode through the first lower connecting seat respectively.

Preferably, the end part of one end of the lower heating rods, which is positioned on the supporting electrode, is connected with an integrated rear connecting frame, and the rear connecting frame is movably connected with the supporting electrode through a second lower connecting seat.

Preferably, the second lower connecting seat is provided with a guide rod, and the rear connecting frame is sleeved on the guide rod through a lower connecting hole; when the lower heating rod is expanded, the lower heating rod can push the rear connecting frame to horizontally slide on the guide rod so as to adapt to the expansion and contraction trend of the lower heating rod.

Preferably, the side heating area comprises a plurality of side heating rods, and two ends of each side heating rod are connected through a side connecting frame; the side connecting frame comprises a plurality of side connecting holes, and side locking nuts comprising middle through holes are arranged in the side connecting holes; the side heating rod is slidably arranged in the middle through hole.

Preferably, the side heating area comprises a left heating area and a right heating area which are uniformly distributed above the bottom heating area, and the lower ends of the left heating area and the right heating area are respectively provided with a left electrode and a right electrode; the left side electrode and the right side electrode are fixedly connected with the side connecting frame through the left connecting seat and the right connecting seat respectively.

Preferably, the two sides of the upper ends of the left heating area and the right heating area are respectively connected through pulling pieces, and a pull rod is arranged between the two pulling pieces.

Preferably, the outer end of the guide rod is provided with a baffle.

Preferably, the side heating rod is provided with a boss positioned at the inner side of the side connection frame near the side connection frames at the two ends.

Preferably, the lower heating zone comprises 8 lower heating rods which are uniformly distributed, one ends of the 8 lower heating rods, which are positioned on the supporting electrodes, are all fixedly connected with the rear connecting frame, one ends of the 4 heating rods, which are positioned on the left side, which are positioned on the power feeding electrode are all fixedly connected with the left front connecting frame, and one ends of the 4 heating rods, which are positioned on the right side, which are positioned on the power feeding electrode are all fixedly connected with the right front connecting frame; the series and parallel current loops of the bottom heating area are formed among the 8 lower heating rods, the rear connecting frame, the left front connecting frame and the right front connecting frame.

The technical effects are as follows:

1. the utility model discloses set up the bottom zone and the lateral part zone that generates heat of independent work, accessible adjustment voltage comes to control each district heating power to the realization is to the control in stove temperature field.

2. The utility model discloses the cluster in well bottom heating area, parallelly connected current loop structure have following effect:

1) compared with the large-resistance hollow heating rod with the linear layout, the current flowing length of the lower heating rod in the series-parallel current loop structure is increased by at least one time compared with the linear layout, so that a solid lower heating rod with a small resistance value can be adopted, and the solid lower heating rod has strong loading capacity, is corrosion-resistant and is not easy to break;

2) a plurality of lower heating rods can be arranged in the bottom heating area of the series-parallel current loop structure, so that the effective heating area is larger, and the heating is more uniform;

3) the non-power-feeding end of the heating rod of the series-parallel current loop structure can slide, and space is allowed for the heating rod to expand and lengthen in the heating process, so that the heating rod and the power-feeding connecting piece can adopt interference fit, and the current transmission is stable and reliable.

3. The lower heating rod in the bottom heating area and the side heating rod in the side heating area are both telescopic and simple to assemble, so that when the lower heating rod and the side heating rod expand and lengthen in the heating process, the arc striking phenomenon caused by poor contact is not easy to occur, the damage to the lower heating rod and the side heating rod can be avoided, and meanwhile, the current transmission is stable and reliable, and the service life of the heating rod can be greatly prolonged.

4. The two ends of the heating rod in the linear layout are usually wrapped by the electricity inlet connecting pieces, so that heat radiation and heat generated by the heating rod are easily blocked and absorbed, the heating rod has small heat productivity at the two ends and large heat productivity in the middle, and the heating uniformity is influenced; and the utility model discloses the connection electrode of well heat-generating body all sets up in the below of generating heat the pole, does not influence the pole that generates heat completely, can guarantee the homogeneity of the pole heating that generates heat.

5. The utility model discloses in with the side connecting frame in two lateral part heating areas through pulling-on piece and pull rod stabilize and hold back, can avoid making the crooked phenomenon of side connecting frame because the pole that generates heat inflation becomes the thrust that produces, also can further avoid the side connecting frame to contact bottom heating area and the short circuit is struck an arc.

Drawings

FIG. 1 is a schematic view of the entire structure of a heat-generating body.

Fig. 2 is a schematic structural diagram of a bottom heating region.

Fig. 3 is a top view of fig. 2.

Fig. 4 is a sectional view in the direction a-a of fig. 3.

Fig. 5 is a plan view of the side heat generation region.

Fig. 6 is a sectional view in the direction B-B of fig. 5.

Fig. 7 is a partially enlarged view of fig. 1 at E.

Description of reference numerals:

1. a side heating rod; 2. a side locking nut; 201. a middle through hole; 3. a side connection frame; 4. a left front connection frame; 5. a right front connection frame; 6. a rear connection frame; 7. a lower heating rod; 8. a support electrode; 9. an electricity feeding electrode; 10. a first lower connecting seat; 11. a second lower connecting seat; 12. a left electrode; 13. a right electrode; 14. a left connecting seat; 15. a right connecting seat; 16. a pull rod; 17. a pull tab; 18. a guide bar; 19. a baffle plate and a boss 20; 21. an insulating sheet.

Detailed Description

Embodiments of the present invention are described in further detail below with reference to fig. 1-7.

A sintering furnace heating element structure comprises a bottom heating area and a side heating area positioned above the bottom heating area, wherein the bottom heating area is specifically provided with a bottom heating area shown as A in figure 1, two side heating areas are uniformly arranged above the bottom heating area, the bottom heating area and the two side heating areas work independently, the two side heating areas are a left heating area shown as B in figure 1 and a right heating area shown as C in figure 1 respectively, and the heating power of each area can be controlled by adjusting the voltage in the three heating areas, so that the overall control of a temperature field in a sintering furnace is realized; those skilled in the art can also set other numbers or arrangement of heating zones according to actual conditions to meet the actual working condition requirements.

As shown in fig. 1-3, the bottom heating area includes a plurality of lower heating rods 7 electrically connected in series and in parallel, one end of each lower heating rod 7 is communicated with a power feeding electrode 9 for supplying power to the bottom heating area, and the lower heating rods 7 are powered through the power feeding electrodes 9; one end of the lower heating rod 7, which is positioned at the power feeding electrode 9, is provided with a front connecting frame which is separated from the power feeding electrode 9, and the front connecting frame is connected with the power feeding electrode 9 through a lower connecting seat I10; the implementation specifically comprises two front connecting frames, namely a left front connecting frame 4 and a right front connecting frame 5 which are symmetrically arranged, and a lower heating rod 7 is fixedly connected with the left front connecting frame 4 and the right front connecting frame 5; the left front connecting frame 4 and the right front connecting frame 5 are respectively and fixedly connected with an electricity inlet electrode 9 through a lower connecting seat I10, and 2 electricity inlet electrodes 9 are all positioned below the lower heating rod 7.

The other end of the lower heating rod 7 opposite to the power feeding electrode 9 is provided with a non-power feeding support electrode 8 for supporting the bottom heating area, and the support electrode 8 is used for supporting and not powering on the lower heating rod 7, so that the lower heating rod 7 forms a single-end power feeding structure with one end being powered and the other end not powered, and the length of current flowing through the lower heating rod 7 is increased.

The end parts of the lower heating rods 7, which are positioned at one end of the supporting electrode 8, are connected with an integrated rear connecting frame 6, the rear connecting frame 6 is movably connected with the supporting electrode 8 through a second lower connecting seat 11, and the supporting electrode 8 is positioned below the lower heating rods 7; the current forms a series-parallel current loop in the lower heating rods 7.

The lower heating area comprises 8 lower heating rods 7 which are uniformly distributed, one ends of the 8 lower heating rods 7, which are positioned on the supporting electrodes 8, are fixedly connected with the rear connecting frame 6, wherein one ends of the 4 lower heating rods 7, which are positioned on the left side, which are positioned on the power feeding electrodes 9 are fixedly connected with the left front connecting frame 4, and one ends of the 4 lower heating rods 7, which are positioned on the right side, which are positioned on the power feeding electrodes 9 are fixedly connected with the right front connecting frame 5; the 4 lower heating rods 7 on the left side are respectively communicated with the 4 lower heating rods 7 on the right side in parallel, and the 8 lower heating rods 7 are communicated in series through the integrated rear connecting frame 6; an n-type series-parallel current loop of a bottom heating area is formed among the 8 lower heating rods 7, the rear connecting frame 6, the left front connecting frame 4 and the right front connecting frame 5.

As shown in fig. 4, the lower connecting seat ii 11 is movably connected with the rear connecting frame 6, the outer end of the lower connecting seat ii 11 is provided with a guide rod 18, the lower connecting seat ii 11 is provided with a threaded hole, the connecting section of the guide rod 18 and the lower connecting seat ii 11 is a threaded rod structure which is matched with the threaded hole, and the guide rod 18 is fixedly connected on the lower connecting seat ii 11 through the threaded rod structure; the lower part of the rear connecting frame 6 is provided with a lower connecting hole, the rear connecting frame 6 is sleeved on the guide rod 18 in a sliding manner through the lower connecting hole, the part of the guide rod 18 connected with the lower connecting hole in the rear connecting frame 6 is of a polished rod structure with a smooth surface, and the rear connecting frame 6 can slide at the polished rod structure; when the lower heating rod 7 generates heat and expands and extends, the lower heating rod 7 can push the rear connecting frame 6 to horizontally slide along the guide rod 18 on the lower connecting seat II 11 so as to adapt to the expansion and extension trend of the lower connecting frame, and the lower heating rod 7 is prevented from arcing, extruding or breaking due to expansion and extension; the outer end of the guide bar 18 is provided with a stop 19 to prevent the rear connection frame 6 from slipping off the guide bar 18.

As shown in fig. 1, 5 and 6, a plurality of side heating rods 1 which are electrically connected in parallel are uniformly arranged in the left heating area and the right heating area, two ends of the side heating rods 1 in the left heating area and the right heating area are respectively connected through side connecting frames 3, specifically, two ends of all the side heating rods 1 in the left heating area are respectively connected through one side connecting frame 3, and two ends of all the side heating rods 1 in the right heating area are respectively connected through one side connecting frame 3; the side connecting frame 3 comprises a plurality of side connecting holes, and the side heating rod 1 is connected in the side connecting holes in a sliding manner; when the side heating rod 1 generates heat, expands and extends, the side heating rod 1 can horizontally extend and retract in the side connecting hole; as shown in fig. 6, the side heat rod 1 is provided with a boss 20 located inside the side connection frame 3 near the both end side connection frame 3, and the side heat rod 1 can be prevented from slipping out of the side connection hole by the boss 20.

A locking bolt 2 comprising a middle through hole 201 is arranged in the side connecting hole, the side connecting hole is a threaded hole, the locking bolt 2 is locked in the side connecting hole, and a nut of the locking bolt is positioned on the outer side of the side connecting frame 3; the side heating rod 1 is sleeved in the middle through hole 201 in a sliding manner; when the side heating rod 1 generates heat, expands and extends, the side heating rod 1 can horizontally extend and retract in the middle through hole 201; the locking bolt 2 can be connected with the more stable cooperation of the side heating rod 1, and when the side heating rod 1 or the peripheral component need to be disassembled, replaced and maintained, only the locking bolt 2 needs to be disassembled, and the side connecting frame 3 does not need to be replaced and disassembled.

As shown in fig. 1, two sides of the lower end of the left heating area and the right heating area are respectively provided with a left electrode 12 and a right electrode 13, the left electrode 12 and the right electrode 13 are respectively fixedly connected with the inner side of the lower end of the side connecting frame 3 through a left connecting seat 14 and a right connecting seat 15, and the left electrode 12 and the right electrode 13 are respectively 2 and are all located below the side heating rod 1.

All be equipped with the insulating part on left side electrode 12, right side electrode 13, advance electric electrode 9 and the support electrode 8, arrange left side electrode 12, right side electrode 13, advance electric electrode 9 and support electrode 8 equipartition in the stove outer side of the stove outer covering of fritting furnace, for the high temperature environment that the electrode is located the stove outer covering, left side electrode 12, right side electrode 13, advance electric electrode 9 and support electrode 8 and be located the stove outer side and can form the cold junction and insulate, improve insulating properties.

The two sides of the upper ends of the left heating area and the right heating area are connected through pull pieces 17, specifically, the upper ends of the two sides of the side connecting frames 3 in the left heating area and the right heating area are connected through the pull pieces 17, a pull rod 16 is arranged between the two pull pieces 17 for further connection, the pull pieces 17 and the pull rod 16 are used for restraining the side connecting frames 3 in the two side heating areas, and the phenomenon that the side connecting frames 3 are inclined or contacted with the bottom heating area to be arc-struck due to thrust generated by expansion and elongation of the side heating rods 1 is avoided; as shown in fig. 7, an insulating sheet 21 is further provided between the tab 17 and the side connection frame 3, the insulating sheet 21 in this embodiment is made of boron nitride, and the pull rod 16 is made of graphite rod.

When the heating device is used, the left heating area and the right heating area are respectively electrified by 2

left electrodes

12 and 2 right electrodes 13, and the bottom heating area is electrified by 2 electrified electrodes 9; and the heating power of each zone can be controlled by adjusting the power-in voltage of each zone so as to control the temperature field in the furnace.

The above embodiments are merely illustrative of the present invention, and are not intended to limit the present invention, and those skilled in the art can make modifications without inventive contribution to the embodiments of the present invention as needed after reading the present specification, but all the embodiments of the present invention are protected by patent laws within the scope of the claims of the present invention.

Claims

1. A sintering furnace heating element structure is characterized by comprising a bottom heating area and a side heating area positioned above the bottom heating area; the bottom heating area comprises a plurality of lower heating rods (7) which are electrically connected in series and in parallel, one end of each lower heating rod (7) is communicated with a power feeding electrode (9) for supplying power to the bottom heating area, the other end, opposite to the power feeding electrode (9), of each lower heating rod (7) is provided with a non-power feeding supporting electrode (8) for supporting the bottom heating area, the lower heating rods (7) are powered in through the power feeding electrodes (9), and current forms a series-parallel current loop in the lower heating rods (7); the side heating area is provided with a plurality of side heating rods (1) which are electrically connected in parallel.

2. A sintering furnace heating body structure as claimed in claim 1, characterized in that two front connecting frames are uniformly connected to the end part of one end of the lower heating rods (7) located at the power feeding electrode (9), namely a left front connecting frame (4) located at the left side and a right front connecting frame (5) located at the right side; the left front connecting frame (4) and the right front connecting frame (5) are fixedly connected with the power feeding electrode (9) through a first lower connecting seat (10) respectively.

3. A sintering furnace heating body structure as claimed in claim 2, characterized in that the end part of one end of the plurality of lower heating rods (7) located at the supporting electrode (8) is connected with an integrated rear connecting frame (6), and the rear connecting frame (6) is movably connected with the supporting electrode (8) through a second lower connecting seat (11).

4. The sintering furnace heating body structure according to claim 3, characterized in that a guide rod (18) is arranged on the second lower connecting seat (11), and the rear connecting frame (6) is sleeved on the guide rod (18) through a lower connecting hole; when the lower heating rod (7) is heated and expanded, the lower heating rod (7) can push the rear connecting frame (6) to horizontally slide on the guide rod (18) so as to adapt to the expansion and retraction trend of the lower heating rod (7).

5. A sintering furnace heat-generating body structure as claimed in claim 4, characterized in that the side heat-generating region comprises a plurality of side heat-generating rods (1), and both ends of the side heat-generating rods (1) are connected by side connecting frames (3); the side connecting frame (3) comprises a plurality of side connecting holes, and side locking nuts (2) comprising middle through holes (201) are arranged in the side connecting holes; the side heating rod (1) is slidably arranged in the middle through hole (201) in a penetrating mode.

6. A sintering furnace heat-generating body structure as claimed in claim 5, characterized in that the side heat-generating regions include a left heat-generating region and a right heat-generating region which are uniformly distributed above the bottom heat-generating region, and the lower ends of the left heat-generating region and the right heat-generating region are respectively provided with a left electrode (12) and a right electrode (13); the left side electrode (12) and the right side electrode (13) are fixedly connected with the side connecting frame (3) through a left connecting seat (14) and a right connecting seat (15) respectively.

7. A sintering furnace heat-generating body structure as defined in claim 6, characterized in that both sides of the upper ends of the left and right heat-generating regions are connected by pull tabs (17), respectively, and a pull rod (16) is provided between the two pull tabs (17).

8. A sintering furnace heat-generating body structure as claimed in claim 7, characterized in that the outer end of the guide rod (18) is provided with a stopper (19).

9. A sintering furnace heat-generating body structure as described in claim 8, characterized in that the side heat-generating rod (1) is provided with bosses (20) located inside the side connection frames (3) near the both end side connection frames (3).

10. A sintering furnace heating body structure as claimed in any one of claims 3-9, characterized in that the lower heating zone comprises 8 lower heating rods (7) which are uniformly distributed, one ends of the 8 lower heating rods (7) which are positioned on the supporting electrode (8) are all fixedly connected with the rear connecting frame (6), wherein one ends of the 4 heating rods which are positioned on the left side and are positioned on the power feeding electrode (9) are all fixedly connected with the left front connecting frame (4), and one ends of the 4 heating rods which are positioned on the right side and are positioned on the power feeding electrode (9) are all fixedly connected with the right front connecting frame (5); an n-type series-parallel current loop of a bottom heating area is formed among the 8 lower heating rods (7), the rear connecting frame (6), the left front connecting frame (4) and the right front connecting frame (5).