CN216523032U

CN216523032U - Tunnel oven telescopic machanism and tunnel oven

Info

Publication number: CN216523032U
Application number: CN202122506532.0U
Authority: CN
Inventors: 陈浩
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-10-18
Filing date: 2021-10-18
Publication date: 2022-05-13
Anticipated expiration: 2031-10-18

Abstract

A tunnel oven telescoping mechanism and a tunnel oven are provided, wherein the telescoping mechanism comprises a front telescoping frame, a rear telescoping frame and a sealing element; the front telescopic frame comprises an inner frame and an outer frame, and the rear telescopic frame comprises a pressing frame. The outer frame is arranged on the preorder hearth module, the inner frame is nested and arranged in the outer frame, the pressing frame is arranged on the subsequent hearth module, the sealing element is arranged between the inner frame and the outer frame, and the pressing frame abuts against the sealing element. The tunnel oven comprises a plurality of hearth modules and the telescopic mechanism, and the hearth modules are arranged in a straight line; the telescopic mechanism is arranged at the joint of two adjacent hearth modules and is respectively connected with the front hearth module and the rear hearth module. Through set up between two adjacent furnace modules telescopic machanism has avoided because of sealing element directly exposes under high temperature environment for a long time to and inside sealing element gets into furnace because of ageing or high temperature melts, cause the incident of furnace internal pollution.

Description

Tunnel oven telescopic machanism and tunnel oven

Technical Field

The utility model relates to the field of baking equipment, in particular to a tunnel oven telescopic mechanism and a tunnel oven.

Background

Expansion with heat and contraction with cold are natural physical phenomena, which refer to the property that an object expands when heated and contracts when cooled. Because the movement of particles (atoms) in the object can change along with the temperature, when the temperature rises, the vibration amplitude of the particles is increased, so that the object expands; however, as the temperature decreases, the amplitude of the particle vibration decreases, causing the object to contract. The expansion joint is a structural joint provided at an appropriate position on the device to prevent the structure from cracking or breaking due to temperature change (thermal expansion or cold contraction).

At present, tunnel ovens used in the market generally have a length of 60-100 meters and are assembled in a modularized way, when the ovens are operated, the temperature in a hearth can reach and be kept at about 350 ℃, the temperature difference with the normal temperature state exceeds 300 ℃, most parts of the ovens, particularly tunnel parts forming a hearth main body, are made of metal, the coefficient of linear expansion of the metal at 20-400 ℃ is lower, for example, cast iron is 11.5-12.7 x 10^-6/deg.C, larger, e.g. aluminum alloys, may reach 23.8 x 10 ° C^-6V. C. At this moment, set up the expansion joint between each module of oven and just become important problem, both need satisfy the sealed requirement of high temperature, also need satisfy the flexible requirement of high temperature inflation simultaneously, but also need compromise simple to operate's requirement. The expansion joint that oven that sells on the market set up ubiquitous following problem: (1) the outer diameter of the small metal frame is equal to or slightly smaller than the inner diameter of the large metal frame by mutually nesting the two metal frames with different sizes, and because a gap inevitably exists between the two metal frames, the potential safety hazard of scalding personnel due to the leakage of heat and water vapor of a hearth is easily caused; (2) a combined sealing structure of a metal frame and a sealing gasket is adopted, the metal frames need to be connected through bolts, the cost is high, and the installation is complex; (3) adopt the direct clamping of nonmetal heat insulating mattress to seal between metal frame, heat insulating mattress and the inside direct intercommunication of furnace, because the heat insulating mattress exposes under high temperature environment for a long time, take place ageing easily, and then cause the food incident who pollutes toast food in the furnace.

SUMMERY OF THE UTILITY MODEL

The first purpose of the utility model is to provide a tunnel oven telescopic mechanism which can prevent a hearth from being polluted due to aging of a sealing element. The method is realized by the following technical scheme:

a tunnel oven telescopic mechanism is arranged between two adjacent preorder hearth modules and posterior hearth modules and comprises a front telescopic frame, a rear telescopic frame and a sealing element; the method is characterized in that: the front telescopic frame comprises an inner frame and an outer frame, the rear telescopic frame comprises a pressing frame, the outer frame is arranged on the end face, close to the subsequent hearth module, of the preorder hearth module, the outer radial width of the inner frame is smaller than the inner radial width of the outer frame, the outer frame and the outer frame are arranged on the outer frame in a nested mode or the end face, close to the subsequent hearth module, of the preorder hearth module, the radial width of the pressing frame is larger than that of the inner frame and smaller than that of the outer frame, the pressing frame is arranged on the end face, close to the preorder hearth module, of the subsequent hearth module, the sealing element is arranged between the inner frame and the outer frame, and the pressing frame abuts against the sealing element.

In the technical scheme, the sealing element is arranged between the inner frame and the outer frame, so that the safety accident that the sealing element is directly exposed in a high-temperature environment for a long time and enters the hearth due to aging or high-temperature melting to cause pollution inside the hearth is avoided; the pressing frame is abutted against the flexible sealing element, so that the sealing performance of the telescopic mechanism is improved on the premise of ensuring the telescopic of the hearth module.

As a further improvement of the present invention, the rear telescopic frame further comprises a compensation frame, the compensation frame is mounted on an end surface of the subsequent furnace module close to the preceding furnace module, and the pressing frame is mounted on the compensation frame.

As a further improvement of the present invention, the centroids of the inner frame and the outer frame overlap in the front-rear direction.

As a further improvement of the present invention, the pressing frames are radially spaced apart from the inner frame and the outer frame, respectively.

As a further improvement of the utility model, a contraction part is concavely arranged on the inner frame, and the contraction part is arranged at one end of the inner frame close to the preorder hearth module.

As a further improvement of the utility model, the cross section of the concave part of the contraction part is one of an acute triangle, a right triangle, an obtuse triangle, a rectangle and a trapezoid.

As a further improvement of the utility model, the pressing frame is provided with a butting part, the butting part is arranged at one end of the pressing frame far away from the subsequent hearth module, and the end surface of the butting part is parallel to the end surface of the subsequent hearth module.

As a further improvement of the utility model, the furnace hearth structure further comprises a limiting mechanism, wherein the limiting mechanism is arranged on the preorder furnace hearth module and/or the postorder furnace hearth module and limits the telescopic distance of the preorder furnace hearth module and/or the postorder furnace hearth module in the front-back direction.

As a further improvement of the present invention, the limiting mechanism includes a limiting groove and a limiting pin, the limiting groove is fixedly disposed on an outer side surface of the preceding furnace module and/or the following furnace module, and the limiting pin is fixedly connected with an external mechanism and inserted into the limiting groove.

The second purpose of the utility model is to provide a tunnel oven, which can meet the requirements of expansion with heat and contraction with cold of the oven and improve the performance of a telescopic mechanism of the oven. The method is realized by the following technical scheme:

a tunnel oven comprises a plurality of hearth modules which are arranged in a straight line, wherein the tail part of the previous hearth module is connected with the front part of the next hearth module; the method is characterized in that: the furnace hearth structure is characterized by further comprising the telescopic mechanisms, wherein the telescopic mechanisms are arranged at the joints of the two adjacent furnace hearth modules and are respectively connected with the front furnace hearth module and the rear furnace hearth module.

Among the above-mentioned technical scheme, through set up telescopic machanism between two adjacent furnace modules, satisfied the furnace module and heated the inflation displacement that produces at the during operation, improved telescopic machanism's sealing performance simultaneously, reduced the loss of steam and steam in the furnace, improved the temperature stability and the security performance of tunnel oven.

Drawings

Fig. 1 is a front view of a tunnel oven provided in an embodiment of the present invention (only two hearth modules are shown).

Fig. 2 is a sectional view taken along the line a-a in fig. 1.

Fig. 3 is a partially enlarged view of the portion I in fig. 2.

Detailed Description

The following description of the embodiments of the present invention will be further described with reference to the accompanying drawings, wherein for the purpose of facilitating explanation, the upper, lower, left, right, front, rear, etc. orientations may be defined in the application, and the definitions are intended to facilitate clear description of the relative positions of the structures, and are not intended to limit the actual orientations of the products during the manufacturing, use, sale, etc. The following further describes embodiments of the present invention with reference to the accompanying drawings:

example one

Referring to fig. 1-3, the present embodiment provides a tunnel oven telescoping mechanism, which includes a front telescoping frame, a rear telescoping frame, a limiting mechanism and a sealing element.

The front telescopic frame comprises a rectangular inner frame 11 and an outer frame 12, the outer frame 12 is mounted on the end face, close to the subsequent hearth module, of the preceding hearth module, the thickness of the inner frame 11 is the same as that of the outer frame 12, the radial width of the inner frame 11 is smaller than that of the outer frame 12, a contraction portion 111 is radially and concavely arranged on the inner frame 11, the contraction portion 111 is arranged at one end, close to the preceding hearth module, of the inner frame 11, the inwards concave cross-sectional shape is a right triangle (as other realizable technical schemes, the contraction portion can also be arranged in the middle of the inner frame, and the inwards concave cross-sectional shape of the contraction portion can also be an acute triangle, an obtuse triangle, a rectangle, a trapezoid and the like). The inner frame 11 is mounted on the outer frame 12 in a nested manner (as another realizable technical solution, the inner frame 11 may also be mounted on an end surface of a preceding furnace module, the end surface being close to one end of a succeeding furnace module), and after the mounting is completed, centroids of the inner frame 11 and the outer frame 12 are overlapped in the front-rear direction to form an annular sealing groove 13.

The rear telescopic frame comprises a rectangular pressing frame 21 and a rectangular compensation frame 22, the radial width of the pressing frame 21 is larger than that of the inner frame 11 and smaller than that of the outer frame 12, a butting part 211 is arranged on the pressing frame 21, the butting part 211 is arranged at one end, far away from the subsequent hearth module, of the pressing frame 21 and is parallel to the end face of the subsequent hearth module, the inner radial width of the compensation frame 22 is equal to or slightly larger than the outer radial width of the pressing frame 21, the compensation frame 22 is arranged on the end face, close to the preceding hearth module, of the subsequent hearth module, the pressing frame 21 is arranged on the compensation frame 22 in a nested mode, the centroids of the compensation frame 22 and the pressing frame 21 are overlapped with the inner frame 11 and the outer frame 12 in the front-rear direction, and the pressing frame 21 is spaced from the inner frame 11 and the outer frame 12 and does not contact with each other.

The sealing element 30 is installed in the sealing groove 13 formed between the inner frame 11 and the outer frame 12 and located at the concave position of the shrinking portion 111, and the pressing frame 21 abuts against the sealing element 30. The two sets of limiting mechanisms respectively comprise a limiting groove 41 and a limiting pin 42, the limiting grooves 41 are respectively and fixedly arranged on the outer side surfaces of the preorder hearth module and the postorder hearth module, the limiting pin 42 is fixedly connected with an external mechanism (such as a supporting leg 51 fixed on the ground) and inserted into the limiting groove 41, the limiting pin can move in the limiting groove 41 along the front-rear direction of the hearth module, and the limiting mechanism limits the moving distance of the hearth module in the front-rear direction.

Through setting up inside casing 11 and frame 12 to form the seal groove 13 that is used for placing sealing element 30 between inside casing 11 and frame 12, still be provided with indent constriction 111 on inside casing 11, when the furnace module is heated the inflation, be close to each other at two adjacent furnace modules, support on sealing element 30 press frame 21 to produce the oppression power to sealing element 30, make sealing element 30 produce the deformation, constriction 111 can hold sealing element 30 because of the radial expansion deformation that the compression of front-back direction brought, works as when furnace module temperature descends, because sealing element 30's elastic deformation resumes, press frame 21 is pushed back initial position. The compensation frame 22 is used for compensating installation errors among the hearth modules, the hearth modules are difficult to install in place at one time due to large size and heavy weight, the positions of the hearth modules in the front-back direction do not need to be accurately determined during positioning by adopting the compensation frame, and the installation requirements can be met as long as the installation errors do not exceed a certain range. The limiting mechanism limits the moving distance of the hearth modules in the front-back direction, and the front hearth module and the rear hearth module are prevented from being separated from each other due to overlarge contraction displacement.

Example two

Referring to fig. 1 to 3, the present embodiment provides a tunnel oven, which includes a plurality of hearth modules 50 and a telescopic mechanism provided in the first embodiment, wherein the plurality of hearth modules 50 are arranged in a straight line, and the tail of the front hearth module is connected to the front of the rear hearth module; the telescopic mechanism is arranged at the joint of two adjacent preorder hearth modules and a posterior hearth module and is respectively connected with the two front hearth modules and the two back hearth modules 50.

When the tunnel oven is installed, the limiting groove 41 is welded on the outer side surface of each hearth module 50, the outer frame 12 is welded on the end surface of the preceding hearth module, which is close to the subsequent hearth module, the inner frame 11 is welded on the outer frame 12 with the contraction part 111 facing the preceding hearth module, and the sealing element 30 is placed in the sealing groove 13 formed between the inner frame 11 and the outer frame 12 and is located at the concave position of the contraction part 111; the compensation frame 22 is welded on the end surface of the subsequent hearth module close to the preceding hearth module, and the pressing frame 21 is sleeved in the compensation frame 22 with the abutting part 211 facing the preceding hearth module. The upper, lower, left and right positions of each furnace module 50 are adjusted according to the front and back sequence of the furnace modules 50, so that a plurality of furnace modules 50 are aligned on a straight line, the distance between two adjacent furnace modules 50 is larger than the sum of the thickness of the outer frame 12 and the thickness of the compensation frame 22 and smaller than the sum of the thickness of the outer frame 12, the thickness of the pressing frame 21 and the thickness of the compensation frame 22, and the furnace modules 50 are fixed. Adjusting the front and rear positions of the pressing frame 21 to make the abutting portion 211 of the pressing frame 21 abut against the sealing element 30, and then welding the pressing frame 21 on the compensation frame 22. Finally, the stopper pin 42 is inserted into the stopper groove 41 and is fixedly connected to an external mechanism.

The above embodiments are merely for full disclosure and not for limitation, and any replacement of equivalent technical features, which can be obtained without inventive work based on the gist of the present invention, should be construed as the scope of the present disclosure.

Claims

1. A tunnel oven telescopic mechanism is arranged between two adjacent preorder hearth modules and posterior hearth modules and comprises a front telescopic frame, a rear telescopic frame and a sealing element; the method is characterized in that: the front telescopic frame comprises an inner frame and an outer frame, the rear telescopic frame comprises a pressing frame, the outer frame is arranged on the end face, close to the subsequent hearth module, of the preorder hearth module, the outer radial width of the inner frame is smaller than the inner radial width of the outer frame, the outer frame and the outer frame are arranged on the outer frame in a nested mode or the end face, close to the subsequent hearth module, of the preorder hearth module, the radial width of the pressing frame is larger than that of the inner frame and smaller than that of the outer frame, the pressing frame is arranged on the end face, close to the preorder hearth module, of the subsequent hearth module, the sealing element is arranged between the inner frame and the outer frame, and the pressing frame abuts against the sealing element.

2. The telescoping mechanism of claim 1, wherein: the rear telescopic frame further comprises a compensation frame, the compensation frame is installed on the end face, close to the preceding hearth module, of the subsequent hearth module, and the pressing frame is installed on the compensation frame.

3. The telescoping mechanism of claim 1, wherein: the centroids of the inner frame and the outer frame overlap in the front-rear direction.

4. The telescoping mechanism of claim 1, wherein: the pressing frame is respectively spaced from the inner frame and the outer frame in the radial direction.

5. The telescoping mechanism of claim 1, wherein: the inner frame is concavely provided with a contraction part, and the contraction part is arranged at one end of the inner frame close to the preorder hearth module.

6. The telescoping mechanism of claim 5, wherein: the cross section of the concave part of the contraction part is in the shape of an acute triangle, a right triangle, an obtuse triangle, a rectangle or a trapezoid.

7. The telescoping mechanism of claim 1, wherein: the pressing frame is provided with a butting part, the butting part is arranged at one end, far away from the subsequent hearth module, of the pressing frame, and the end face of the butting part is parallel to the end face of the subsequent hearth module.

8. The telescopic mechanism according to any one of claims 1 to 7, wherein: the furnace body structure is characterized by further comprising a limiting mechanism, wherein the limiting mechanism is arranged on the preorder furnace module and/or the subsequent furnace module and limits the telescopic distance of the preorder furnace module and/or the subsequent furnace module in the front-back direction.

9. The telescoping mechanism of claim 8, wherein: the limiting mechanism comprises a limiting groove and a limiting pin, the limiting groove is fixedly arranged on the outer side surface of the preorder hearth module and/or the postorder hearth module, and the limiting pin is fixedly connected with an external mechanism and inserted into the limiting groove.

10. A tunnel oven comprises a plurality of hearth modules which are arranged in a straight line, wherein the tail part of the previous hearth module is connected with the front part of the next hearth module; the method is characterized in that: the furnace structure further comprises a telescopic mechanism as claimed in any one of claims 1 to 9, wherein the telescopic mechanism is arranged at the joint of two adjacent furnace modules and is respectively connected with the front furnace module and the rear furnace module.