Multi-loop temperature control kiln

Abstract

The utility model provides a multi-loop temperature control kiln which can improve the condition that a temperature field in the kiln is not uniform and ensure the sintering performance of a product. Comprising a furnace body, a heating cavity is formed in the furnace body, a roller rod used for containing a sagger is installed in the heating cavity, the roller rod is connected with a conveying mechanism so that the sagger used for containing a product can be conveyed in the furnace body, and a plurality of electric heating elements are installed in the heating cavity. The electric heating element is arranged on the outer side of the sagger in a surrounding mode, a thermocouple is installed in the portion, located on the outer side of the sagger, of the furnace body, an exhaust port is formed in the top of the furnace body, an exhaust device is installed on the exhaust port and comprises an exhaust pipe, an air pressure sensor and a gate valve, the exhaust pipe is communicated with the exhaust port, and the air pressure sensor is communicated with the gate valve. The gate valve is installed on the exhaust pipe, and the air pressure sensor is installed in the heating cavity.

Description

TECHNICAL FIELD

[0001] The utility model relates to kiln equipment technical field, concretely is a kind of multi-loop temperature control kiln. BACKGROUND

[0002] Kiln refers to the furnace for firing ceramic objects and sculptures or is to let enamel fusion to the surface of metal object, generally use brick and stone to build, according to need can be made into various size specifications, can use combustible gas, oil or electricity to run, and electric kiln is more easily controlled temperature than using combustible gas and oil kiln.

[0003] But the temperature control mode of current kiln is mostly up and down heating, up and down temperature control, that is, one temperature zone two temperature control circuits, so that the temperature field in furnace is uneven, lead to when producing certain products, the temperature difference of sagger for placing products at different positions in kiln is relatively large, even can be more than 15 ℃, thereby can greatly affect the sintering performance of product. UTILITY MODEL CONTENT

[0004] In view of the above problems, the utility model provides a kind of multi-loop temperature control kiln, it can improve the uneven situation of temperature field in furnace, guarantee the sintering performance of product.

[0005] The utility model adopts following technical scheme, a kind of multi-loop temperature control kiln, including furnace body, heating cavity is equipped in the furnace body, roller bar for placing sagger is installed in the heating cavity, the roller bar is connected with conveying mechanism, to realize the conveying of the sagger for placing product in the furnace body, several electric heating elements are installed in the heating cavity, and the electric heating element is with surrounding form setting at the outside of sagger, thermocouple is installed in the furnace body at the outside of sagger, exhaust port is set up in the top of the furnace body, and exhaust device is installed on the exhaust port, the exhaust device includes exhaust pipe, air pressure sensor, plug valve, the exhaust pipe is communicated with the exhaust port, the plug valve is installed on the exhaust pipe, the air pressure sensor is installed in the heating cavity.

[0006] Further, the furnace body bottom is equipped with air inlet, preheating cavity is set up in the heating cavity, the air inlet is communicated with the preheating cavity;

[0007] Further, two-way exhaust port is set up in the top of the furnace body, and the exhaust pipe is communicated with two-way exhaust port by tee pipe;

[0008] Further, the electric heating element adopts electric heating rod, the roller bar adopts SiSiC silicon carbide roller bar;The exhaust pipe adopts ceramic material;

[0009] Further, the electric heating elements are divided into upper electric heating elements, lower electric heating elements, left electric heating elements and right electric heating elements, which are arranged on the four sides of the sagger respectively; and the upper electric heating elements, the lower electric heating elements, the left electric heating elements and the right electric heating elements are arranged alternately and spaced apart from each other.

[0010] Further, the distribution density of the electric heating elements at the upper and lower ends of the sagger is greater than that of the electric heating elements at the left and right ends of the sagger.

[0011] Further, the upper electric heating elements, the lower electric heating elements, the left electric heating elements and the right electric heating elements respectively penetrate the furnace body; and the thermocouples are arranged on the four sides of the sagger.

[0012] Further, the electric heating elements are divided into upper electric heating elements and lower electric heating elements, the upper electric heating elements are arranged at both ends of the heating cavity above the sagger, and the lower electric heating elements are arranged at both ends of the heating cavity below the sagger.

[0013] Further, the upper electric heating elements and the lower electric heating elements are respectively arranged in the furnace body and extend into the middle part of the heating cavity; and the thermocouples are arranged at both ends of the heating cavity above and below the sagger.

[0014] The electric heating elements are arranged in a surrounding manner outside the sagger, the thermocouples are arranged in the furnace body outside the sagger, multiple loop temperature control can be realized, the temperature field in the furnace is uniform, the sintering performance of the product is ensured, the exhaust device is arranged, the air pressure in the furnace body can be detected in real time through the air pressure sensor, the plug valve is opened and closed to realize automatic exhaust, the air pressure in the furnace body is stable, air field disturbance is reduced, and the economic use value is good. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is the sectional view of the embodiment one of the utility model;

[0016] Figure 2 is the plan view of the embodiment one of the utility model;

[0017] Figure 3 is the side view of the embodiment one of the utility model;

[0018] Figure 4 is the structure schematic view of the exhaust device in the utility model;

[0019] Figure 5 is the sectional view of the embodiment two of the utility model. DETAILED DESCRIPTION

[0020] Embodiment one

[0021] As Figures 1-4 shown in the utility model discloses a kind of multi-loop temperature control kiln, including furnace body 1, heating cavity 2 is equipped in furnace body 1, heating cavity 2 is installed with roller bar 4 for placing sagger 3, roller bar 4 is connected with conveying mechanism (not shown in drawing), to realize the conveying of sagger 3 for placing product in furnace body 1, several electric heating elements are installed in heating cavity 2, and electric heating element is arranged in surrounding form on the outside of sagger 3, hot-wire thermocouple 5 is installed in furnace body 1 on the outside of sagger 3, exhaust port 6 is opened in the top of furnace body 1, and exhaust device is mounted on exhaust port 6, and exhaust device includes exhaust pipe 7, air pressure sensor (not shown in drawing), plug valve 8, exhaust pipe 7 is communicated with exhaust port 6, plug valve 8 is installed on exhaust pipe 7, and air pressure sensor is installed in heating cavity 2.

[0022] The bottom of furnace body 1 is equipped with air inlet 9, and preheating cavity 10 is arranged in communication in heating cavity 2, and air inlet 9 is communicated with preheating cavity 10;Two-way exhaust port 6 is opened in the top of furnace body 1, and exhaust pipe 7 is communicated with two-way exhaust port 6 through tee pipe 11;Electric heating rod is used for electric heating element, and SiSiC silicon carbide roller bar is used for roller bar 4;Ceramic material is used for exhaust pipe 7.

[0023] Electric heating element is divided into upper electric heating element 12, lower electric heating element 13, left electric heating element 14 and right electric heating element 15, and upper electric heating element 12, lower electric heating element 13, left electric heating element 14 and right electric heating element 15 are arranged on the four sides of sagger 3 respectively;And upper electric heating element 12, lower electric heating element 13, left electric heating element 14 and right electric heating element 15 are arranged in staggered form between intervals;The distribution density of electric heating element located at the upper and lower ends of sagger 3 is greater than that of electric heating element located at the left and right ends of sagger 3, so that the temperature above and below heating cavity 2 is greater than that on the left and right of heating cavity 2;Upper electric heating element 12, lower electric heating element 13, left electric heating element 14 and right electric heating element 15 penetrate furnace body 1 respectively;Hot-wire thermocouple 5 is arranged on the four sides of sagger 3.

[0024] Example two

[0025] As Figure 4 , Figure 5 shown, the difference between this embodiment two and example is that electric heating element is divided into upper electric heating element 12 and lower electric heating element 13, and upper electric heating element 12 is arranged at both ends in heating cavity 2 above sagger 3, and lower electric heating element 13 is arranged at both ends in heating cavity 2 below sagger 3;Upper electric heating element 12 and lower electric heating element 13 are respectively arranged in furnace body 1, and extend into the middle of heating cavity 2;Hot-wire thermocouple 5 is arranged at both ends in heating cavity 2 above and below sagger 3.

[0026] The utility model discloses a structure can be applied to box -type furnace or roller -way furnace, embodiment one, the upper electric heating element 12 of interval interlaced arrangement, lower electric heating element 13, left electric heating element 14, right electric heating element 15 are arranged respectively in the four around sides of saggar 3, then four loop individual temperature control of upper, lower, left, right can be realized, further can make the even temperature field in the furnace, guarantee the sintering performance of product, in the embodiment two, the heating cavity 2 of upper and lower saggar 3 is arranged with upper electric heating element 12, lower electric heating element 13 respectively in both ends, then the upper electric heating element 12 of two groups is equipped with in the upper saggar 3, the lower electric heating element 13 of two groups is equipped with in the lower saggar 3, then two upper, two lower four loop individual temperature control can be realized, also can make the even temperature field in the furnace, guarantee the sintering performance of product, simultaneously, through the real -time detection of gas pressure sensor in furnace body 1 gas pressure, and gas pressure sensor will the gas pressure value of detection real -time transmission to the corresponding existing controller, then the controller can real -time control plug valve 8 to open and close to realize automatic exhaust, to guarantee the gas pressure stability in the furnace, reduce the air field disturbance.

[0027] It is obvious to a person skilled in the art that the utility model is not limited to the details of the above-mentioned exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, the embodiments should be regarded as exemplary and non-limiting from any point of view, and the scope of the utility model is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0028] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be properly combined to form other embodiments that those skilled in the art can understand.

Claims

1. A multi-loop temperature-controlled kiln, comprising a kiln body, wherein a heating chamber is provided within the kiln body, and rollers for placing saggers are installed within the heating chamber, the rollers being connected to a conveying mechanism to realize the conveying of the saggers for placing products within the kiln body, characterized in that: A plurality of electric heating elements are installed in the heating cavity, and the electric heating elements are arranged in a surrounding form outside the sagger.

2. A multi-circuit temperature-controlled furnace according to claim 1, characterized in that: The bottom of the furnace body is provided with an air inlet, and the heating cavity is provided with a preheating cavity.

3. A multi-pass temperature controlled furnace as claimed in claim 1, wherein: Two exhaust outlets are formed in the top of the furnace body, and the exhaust pipe is connected with the two exhaust outlets through a tee pipe.

4. A multi-pass temperature controlled furnace as claimed in claim 1, wherein: The electric heating element adopts an electric heating rod, the roller rod adopts a SiSiC silicon carbide roller rod, and the exhaust pipe adopts ceramic material.

5. A multi-circuit temperature-controlled furnace according to any one of claims 1 to 4, characterized in that: The electric heating elements are divided into upper electric heating elements, lower electric heating elements, left electric heating elements and right electric heating elements, which are arranged around the sagger.

6. A multi-pass temperature controlled furnace as claimed in claim 5, wherein: The distribution density of the electric heating elements at the upper and lower ends of the sagger is greater than that of the electric heating elements at the left and right ends of the sagger.

7. A multi-pass temperature controlled furnace as claimed in claim 5, wherein: The upper electric heating elements, the lower electric heating elements, the left electric heating elements and the right electric heating elements respectively penetrate the furnace body, and the thermocouples are arranged around the sagger.

8. A multi-circuit temperature control furnace according to any one of claims 1 to 4, characterized in that: The electric heating elements are divided into upper electric heating elements and lower electric heating elements, and the upper electric heating elements are arranged at both ends of the heating cavity above the sagger, and the lower electric heating elements are arranged at both ends of the heating cavity below the sagger.

9. A multi-pass temperature controlled furnace as claimed in claim 8, wherein: The upper electric heating elements and the lower electric heating elements are respectively arranged in the furnace body and extend into the middle part of the heating cavity, and the thermocouples are arranged at both ends of the heating cavity above and below the sagger.

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