A furnace bridge structure with water cooling and calcination kiln

Abstract

The utility model belongs to calcination kiln body structure field discloses a kind of furnace bridge structure and calcination kiln with water cooling, this scheme is by being arranged together with water cooling pipe and steel pipe, and then the heat of steel rail can be transferred to water cooling pipe by heat transfer, the high temperature of steel rail is endothermic by the water flowing in water cooling pipe, to reduce the influence of high temperature on steel rail, avoid the thermal deformation of steel pipe, improve the stability when steel rail is used. By the setting of vertical section, the arch foot of furnace arch can not only act on steel rail with vertical pressure, but also transfer horizontal pressure to vertical section by abutting with vertical section, so that kiln foundation will not directly bear the pressure of furnace arch, and the kiln foundation is protected.

Description

Technical Field

[0001] This utility model belongs to the technical field of kiln body structure of calcining kilns, specifically relating to a water-cooled furnace bridge structure and a calcining kiln. Background Technology

[0002] A vertical kiln, also known as a vertical furnace, is a thermal equipment that continuously calcines materials using the counter-current principle. It consists of a kiln body, feeding and discharging devices, and ventilation equipment. It has the advantages of lower infrastructure investment, smaller footprint, high efficiency, low fuel consumption, and ease of mechanization and automation.

[0003] In existing vertical calcining kilns, the furnace bridge in the kiln foundation is usually constructed by directly placing a brick arch (furnace arch) on heavy-duty steel rails. The heavy-duty steel rails support the furnace arch, but when subjected to high temperatures for a long time, the internal structure of the metal changes, leading to a decrease in the strength of the rails. When the rails are subsequently subjected to the pressure of the furnace arch, they are prone to deformation (i.e., thermal deformation of the metal), which damages the furnace arch and affects the safety of operation and use. At the same time, it results in a shorter actual service life of the furnace bridge. Utility Model Content

[0004] The present invention aims to provide a water-cooled furnace bridge structure and calcining kiln to solve the problem of thermal deformation of existing steel rails mentioned above.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a water-cooled furnace bridge structure, disposed on a kiln foundation, comprising... The steel rails are buried at both ends in the kiln foundation, and vertical sections are set at both ends of the steel rails; The furnace arch is installed on the steel rail, and its two ends abut against two vertical sections respectively; Water-cooled pipes are installed in the kiln foundation and connected to the steel rails.

[0006] The principle and effects of this technical solution: 1. By setting the water-cooling pipe together with the steel pipe, the heat of the rail can be transferred to the water-cooling pipe through heat transfer. The water flowing inside the water-cooling pipe absorbs the heat from the high temperature of the rail, thereby reducing the impact of high temperature on the rail, avoiding thermal deformation of the steel pipe, and improving the stability of the rail during use.

[0007] 2. By setting up the vertical section, the arch foot of the furnace arch can not only apply the vertical pressure to the rail, but also transfer the horizontal pressure to the vertical section through contact with it. Thus, the kiln foundation will not directly bear the pressure of the furnace arch, protecting the kiln foundation.

[0008] The present invention is further configured such that: the rail is an I-beam, and the water-cooling pipe is wound around the middle of the rail.

[0009] The principle and effect of this technical solution: By setting up the I-beam, the water-cooling pipe can be installed together with the I-beam by wrapping around its middle, which reduces the space occupied by the water-cooling pipe on the kiln foundation. That is, the total area of ​​the holes required to be opened in the kiln foundation is smaller, which makes the structural strength of the kiln foundation higher. Furthermore, the water-cooling pipe is located in the middle of the rail, which allows for more uniform heat transfer to the I-beam, resulting in better heat transfer efficiency and effect.

[0010] The present invention is further configured such that: a pipe support is provided on the outer sleeve of the water-cooled pipe, and the pipe support is fixed to the steel rail.

[0011] The principle and effect of this technical solution: The water-cooling pipe is fixed by the pipe support to prevent it from detaching from the I-beam.

[0012] The present invention is further configured such that the cross-section of the water-cooled pipe includes two semi-circular arc segments and a straight line segment connecting the two semi-circular arc segments.

[0013] The principle and effect of this technical solution: By making the cross-section of the water-cooled pipe into two semi-circular arc segments and a straight segment in the middle, the area of ​​direct contact between the water-cooled pipe and the steel pipe is larger, and the heat transfer effect is better.

[0014] The present invention is further configured such that: a heat transfer cover is provided outside the water cooling pipe, the heat transfer cover abuts against the steel rail, and the heat transfer cover is fixed to the steel rail.

[0015] The principle and effect of this technical solution: By setting up the heat transfer cover, heat can be transferred through the area where the rail does not contact the water cooling pipe, indirectly increasing the contact area and thus improving the water cooling effect. At the same time, the heat transfer cover can also shield and protect the outer wall of the water cooling pipe, preventing external conditions from corroding the water cooling pipe and extending the service life of the water cooling pipe.

[0016] The present invention is further configured to include a heat transfer block, one side of which has an arc-shaped groove adapted to the water-cooled pipe, the other side of which abuts against the steel rail, and the heat transfer block is located inside the pipe support.

[0017] The principle and effect of this technical solution: By setting up the heat transfer block, the line contact between the water-cooled pipe and the rail is changed to the surface contact with the heat transfer block. The heat transfer block transfers heat to the rail, thereby indirectly increasing the contact area between the water-cooled pipe and the rail, that is, increasing the heat transfer area and improving the heat transfer efficiency.

[0018] The present invention is further configured such that a pad is installed inside the kiln foundation, and the pad is fixed to the bottom surface of the end of the rail.

[0019] The principle and effect of this technical solution: The pad plate allows the local stress on the end of the rail and the kiln foundation to be extended through the pad plate. That is, the pad plate bears the pressure on the rail and distributes it to the kiln foundation, which increases the contact area, reduces the local pressure required by the kiln foundation, and protects the kiln foundation.

[0020] This utility model also discloses a calcining kiln, including a kiln body, which is set on a kiln foundation.

[0021] The principle and effect of this technical solution: By setting up a water-cooled furnace bridge structure, the high temperature will not damage the furnace bridge structure during operation of the kiln body and kiln foundation, thus ensuring the normal operation of the kiln body. Attached Figure Description

[0022] Figure 1 This is a front view of Embodiment 1 of the present utility model; Figure 2 for Figure 1 Enlarged view of the foundation of the central kiln; Figure 3 for Figure 2 A partial top view; Figure 4 for Figure 2 Enlarged cross-sectional view of the central rail section; Figure 5 This is a schematic cross-sectional view of the rail section in Embodiment 2 of this utility model; Figure 6 for Figure 5 Schematic diagram of the structure without pipe supports; Figure 7 This is a schematic cross-sectional view of the rail section in Embodiment 3 of this utility model; Figure 8 This is a schematic cross-sectional view of the rail section in Embodiment 4 of this utility model; Figure 9 This is a cross-sectional schematic diagram of the rail section in Embodiment 5 of this utility model. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments: The reference numerals in the accompanying drawings include: 110. Kiln foundation; 120. Kiln body; 210. Rail; 220. Vertical section; 230. Base plate; 310. Furnace arch; 410. Water-cooled pipe; 411. Semicircular arc segment; 412. Straight segment; 510. Pipe support; 520. Heat transfer cover; 530. Heat transfer block.

[0024] Example 1, as shown in the appendix Figure 1-4 As shown, this utility model discloses a water-cooled furnace bridge structure and a calcining kiln. The calcining kiln includes a kiln body 120 and a kiln foundation 110. The kiln body 120 is set on the kiln foundation 110. The water-cooled furnace bridge structure is specifically set inside the kiln foundation 110 of the calcining kiln. Specifically, it includes a steel rail 210, a furnace arch 310 and a water-cooling pipe 410. The two ends of the steel rail 210 are respectively embedded in the kiln foundation 110, and vertical sections 220 are set at both ends of the steel rail 210. The vertical sections 220 and the steel rail 210 are both I-beams. The vertical sections 220 are welded to the steel rail 210. A pad 230 is pre-embedded in the kiln foundation 110. The pad 230 is fixed to the bottom surface of the end of the steel rail 210. The furnace arch 310 is installed on the steel rail 210 and is also connected to the kiln foundation 110 to bear the pressure on the upper part of the furnace arch 310. The arch feet at both ends of the furnace arch 310 respectively abut against two vertical sections 220. The water cooling pipe 410 passes through the kiln foundation 110 and is wound around the middle of the steel rail 210. Specifically, as follows... Figure 3 As shown, the water-cooled pipe 410 enters from one side of the vertical section 220 at end A, exits from the vertical section 220 at end B, then bends and enters the other side of the vertical section 220 at end B, and then exits from end A, completing the arrangement of one water-cooled pipe 410 around the steel rail 210. Multiple pipe supports 510 connected to the steel rail 210 are fitted around the water-cooled pipe 410. Specifically, the pipe supports 510 on both sides of the steel rail 210 can be simultaneously installed and fixed using bolts and nuts. The water-cooled pipe 410 is connected to an external water circulation system, which controls the water temperature inside the water-cooled pipe 410 to not exceed 60°C.

[0025] Example 2, as shown in the appendix Figure 5 , 6 The difference between the present embodiment and the first embodiment is that the water-cooled pipe 410 is also covered by a heat transfer cover 520, which abuts against the steel rail 210 and is fixed to the steel rail 210. Specifically, the heat transfer cover 520 and the pipe support 510 are arranged side by side to jointly cover the water-cooled pipe 410, and the pipe supports 510 on both sides of the middle part of the steel rail 210 can be installed and fixed simultaneously by bolts and nuts.

[0026] Example 3, as shown in the appendix Figure 7 As shown, the difference from Embodiment 1 is that it also includes a heat transfer block 530. One side of the heat transfer block 530 has an arc-shaped groove adapted to the water cooling pipe 410, and the other side of the heat transfer block 530 abuts against the steel rail 210. The heat transfer block 530 is located inside the pipe support 510.

[0027] Example 4, as shown in the appendix Figure 8 As shown, the difference from Embodiment 1 is that it includes the heat transfer cover 520 and heat transfer block 530 as in Embodiment 2 and Embodiment 3.

[0028] Example 5, as shown in the appendix Figure 9 As shown, the difference from Embodiment 1 is that the cross-section of the water-cooled pipe 410 includes two semi-circular arc segments 411 and a straight segment 412 connecting the two semi-circular arc segments 411. The parts of this device not described herein are the same as or can be implemented using existing technology.

[0029] Among them, insert and sliding insert are mating bodies with holes, the cross section of the shaft or rod matches the hole, and the shaft or rod can slide relative to the hole. Threaded insert is a hole with threads, the shaft or rod is threaded, and the shaft or rod is connected to the mating body by screwing. Detachable installation can be by bolt thread connection or bolt and nut connection, etc., depending on what can be actually achieved.

[0030] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A water-cooled furnace bridge structure, installed on a kiln foundation, characterized in that: include The steel rails are embedded at both ends in the kiln foundation, and vertical sections are provided at both ends of the steel rails; A furnace arch is installed on the steel rail, and both ends of the furnace arch abut against the two vertical sections respectively; A water-cooled pipe is installed in the kiln foundation and is connected to the steel rail.

2. The water-cooled furnace bridge structure as described in claim 1, characterized in that: The rail is an I-beam, and the water-cooling pipe is wound around the middle of the rail.

3. A water-cooled furnace bridge structure as described in claim 2, characterized in that: The water-cooled pipe is fitted with a pipe support, which is fixed to the steel rail.

4. A water-cooled furnace bridge structure as described in claim 2, characterized in that: The cross-section of the water-cooled pipe includes two semi-circular arc segments and a straight line segment connecting the two semi-circular arc segments.

5. A water-cooled furnace bridge structure as described in claim 3, characterized in that: The water-cooled pipe is also covered by a heat transfer cover, which abuts against the steel rail and is fixed to the steel rail.

6. A water-cooled furnace bridge structure as described in claim 3, characterized in that: It also includes a heat transfer block, one side of which has an arc-shaped groove adapted to the water-cooled pipe, and the other side of which abuts against the steel rail. The heat transfer block is located inside the pipe support.

7. A water-cooled furnace bridge structure as described in claim 1, characterized in that: A pad is also installed inside the kiln foundation, and the pad is fixed to the bottom surface of the end of the rail.

8. A calcining kiln, characterized in that: The structure includes a water-cooled furnace bridge as described in any one of claims 1-7, and also includes a kiln body disposed on a kiln foundation.

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