CN110835671A

CN110835671A - Trolley for heat treatment furnace, installation method of trolley and heat treatment furnace

Info

Publication number: CN110835671A
Application number: CN201911255677.9A
Authority: CN
Inventors: 郭有田; 陈中均; 段又天; 曾传银; 王学军; 石昕; 周鑫; 赵向东; 刘坚; 秦涛; 陈轩
Original assignee: Sichuan Petroleum Construction Engineering Co Ltd
Current assignee: Sichuan Petroleum Construction Engineering Co Ltd
Priority date: 2019-12-10
Filing date: 2019-12-10
Publication date: 2020-02-25

Abstract

The invention provides a trolley for a heat treatment furnace, an installation method of the trolley and the heat treatment furnace. The heat treatment furnace comprises a flame nozzle, the trolley comprises a moving mechanism, a refractory layer and a sizing block mechanism, wherein the moving mechanism comprises a moving body and a wheel set connected with the moving body; the fireproof layer is arranged on the movable body; the sizing block mechanism is arranged on the fire-resistant layer and is used for placing a workpiece to be thermally treated, the sizing block mechanism comprises a plurality of supporting gaskets which are parallel to each other and have the same height and a plurality of supporting strips which are arranged on the supporting gaskets along the furnace feeding direction of the trolley, the supporting gaskets have preset thickness along the furnace feeding direction of the trolley, the plane where the upper surfaces of the supporting gaskets are located together and the plane where the upper surfaces of the supporting strips are located together are the same plane, the same plane is parallel to the ground, and the sizing block mechanism is of a hollow structure. The trolley can avoid overburning of the workpiece at the fire hole, the heat treatment temperature is uniform, and the heat treatment quality of the workpiece is good.

Description

Trolley for heat treatment furnace, installation method of trolley and heat treatment furnace

Technical Field

The invention belongs to the technical field of petroleum and natural gas machining, and particularly relates to a trolley for a heat treatment furnace, an installation method of the trolley and the heat treatment furnace, which are particularly suitable for heat treatment of bent pipes.

Background

The trolley for the traditional heat treatment furnace is used for many years, the refractory brick layer of the trolley can be seriously damaged, the fire blocking mode is old, the fire blocking plate is still used, the temperature of a hearth can be uneven, the fire hole bent pipe is easy to overburn, and the heat treatment quality of the bent pipe is influenced.

Disclosure of Invention

In view of the deficiencies in the prior art, it is an object of the present invention to address one or more of the problems in the prior art as set forth above. For example, it is an object of the present invention to provide a trolley for a heat treatment furnace that provides more uniform heat transfer during heat treatment of a workpiece.

In order to achieve the above object, an aspect of the present invention provides a trolley for a heat treatment furnace, the heat treatment furnace may include a burner, and the trolley may include a moving mechanism, a refractory layer, and a paralleling mechanism, wherein the moving mechanism includes a moving body and a wheel set connected to the moving body; the fire-resistant layer is arranged on the movable body; the sizing block mechanism is arranged on the fire-resistant layer, a plurality of supporting gaskets that are parallel to each other and have the same height and a plurality of supporting bars that set up on the supporting gaskets that sizing block mechanism includes that perpendicular to platform truck advances the stove direction setting, the supporting gaskets have certain thickness in platform truck advances the stove direction, and the plane that the common place of upper surface of a plurality of supporting gaskets and the common place of a plurality of supporting bars upper surface are the coplanar just the coplanar is on a parallel with ground, sizing block mechanism is hollow out construction.

In an exemplary embodiment of the trolley for heat treatment according to the present invention, the refractory layer may include a first refractory sub-layer, a second refractory sub-layer and a third refractory sub-layer, which are sequentially disposed from top to bottom, where the first refractory sub-layer is composed of not less than 3 clay bricks, the second refractory sub-layer is formed by laying light insulating bricks, and the third refractory sub-layer is an asbestos layer. Furthermore, the flame retardant coating also comprises a fiber blanket and a protective edge castable which are arranged on the second flame retardant sub-layer and are positioned on two sides of the first flame retardant sub-layer along the furnace entering direction of the trolley.

In an exemplary embodiment of the trolley for heat treatment according to the present invention, the same plane may be vertically spaced more than 500mm from the upper surface of the refractory layer.

In an exemplary embodiment of the heat treatment carriage according to the present invention, the burner may be disposed at both sides of the parallels and the firing direction of the burner is between adjacent support pads.

In an exemplary embodiment of the heat treatment trolley according to the present invention, the upper portion of the support pad may be provided with concave openings for placing the support bars, and the lower portion of the support pad may be provided with convex openings spaced apart from the concave openings.

In an exemplary embodiment of the heat treatment carriage of the present invention, a height difference between the torch and the workpiece to be heat treated may be 300mm or more.

In an exemplary embodiment of the heat treatment trolley of the invention, the material of the sizing block mechanism can be medium-silicon heat-resistant ductile iron.

Another aspect of the present invention provides an installation method of a bogie for a heat treatment furnace, which may include the steps of: cleaning the surface of a moving mechanism for placing a refractory layer; installing a fireproof layer; leveling the surface of the fire-resistant layer; the support spacers are installed, then the support bars are installed and the fire hole positions are set between the adjacent support spacers during the installation process.

In an exemplary embodiment of the method for mounting a trolley for a heat treatment furnace according to the present invention, the refractory layer leveling may include a flatness within ± 5 mm.

Still another aspect of the present invention provides a heat treatment furnace including the above-described heat treatment furnace carriage.

Compared with the prior art, the invention has the beneficial effects that:

(1) the trolley avoids the traditional fire baffle plate and the overburning of the workpiece at the fire hole;

(2) the arrangement mode and the position of the sizing block mechanism and the flame nozzle can enable flame to pass through the bottom of the workpiece and the pore space in the sizing block mechanism, form convection rotary flame, enable heat conduction to be more uniform and ensure the heat treatment temperature of the workpiece to be consistent;

(3) the sizing block mechanism can prevent the workpiece to be heat-treated from directly contacting with the fire-resistant layer, prevent the fire-resistant layer from being damaged by the workpiece to be heat-treated, prevent the fire-resistant layer from being frequently maintained and replaced and save the cost;

(4) the hearth of the heat treatment furnace has uniform temperature and good heat treatment quality of workpieces.

Drawings

The above and other objects and features of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings, in which:

fig. 1 shows a front view and a plan view of a trolley for a heat treatment furnace according to an exemplary embodiment of the present invention;

FIG. 2 shows a schematic view of a support pad according to an exemplary embodiment of the present invention;

FIG. 3 illustrates a schematic view of a refractory layer in accordance with an exemplary embodiment of the present invention.

Detailed Description

Hereinafter, a bogie for a heat treatment furnace, an installation method thereof, and a heat treatment furnace according to the present invention will be described in detail with reference to the accompanying drawings and exemplary embodiments.

Fig. 1 is a front view and a plan view showing a bogie for a heat treatment furnace according to an exemplary embodiment of the present invention, in which fig. 1(a) is a front view of the bogie and fig. 1(b) is a plan view of the bogie. FIG. 2 shows a schematic view of a support pad according to an exemplary embodiment of the present invention; FIG. 3 illustrates a schematic view of a refractory layer in accordance with an exemplary embodiment of the present invention.

One aspect of the present invention provides a bogie for a heat treatment furnace. In an exemplary embodiment of the trolley for a heat treatment furnace of the present invention, as shown in fig. 1, the heat treatment furnace may include several torches 11. The trolley may include a moving mechanism 12 (as shown in fig. 1 (a)), a refractory layer 13, and a sizing mechanism 14.

The moving mechanism 12 may be used to move a dolly. The moving mechanism 12 may include a moving body and a wheel set disposed on a lower surface of the moving body and connected to the moving body. The moving body may be made of a metal material. The wheel sets may be arranged in one or more groups. For example, as shown in fig. 1(a), the wheel set may be disposed at the middle of the moving body, and may include two sets of wheel sets.

The refractory layer 13 may be laid on the upper surface of the moving body 12.

The sizing block mechanism 14 is arranged on the upper surface of the refractory layer 13. The sizing block mechanism 14 is used for placing a workpiece to be heat-treated. The sizing block mechanism 14 may be configured as an integral hollow structure. The workpiece to be subjected to heat treatment is arranged on the sizing block mechanism, the workpiece can be integrally erected, the workpiece is enabled to have a certain distance from the surface of the trolley, the flame nozzles with certain height difference with the workpiece are arranged in a matched mode, flame sprayed out of the flame nozzles can penetrate through the bottom of the workpiece and the hollow space of the sizing block mechanism, convection revolving flame can be formed, heat conduction can be more uniform, and the heat treatment temperature of the workpiece can be kept consistent. As shown in fig. 1, the sizing block mechanism 14 may include a plurality of support spacers 14a disposed perpendicular to the furnace-entering direction of the trolley and support bars 14b disposed along the furnace-entering direction of the trolley. The supporting pads 14a are arranged in parallel, and the supporting pads 14a are arranged at the same height. The support pad 14a is provided with a certain thickness along the direction of the trolley entering the furnace. Because each supporting gasket is arranged at the same height, the upper surface of each supporting gasket is on the same plane. The supporting bars 14b are provided on the upper surface of the supporting pad 14 a. The upper surfaces of the supporting bars are all on the same plane. The plane formed by the upper surfaces of the supporting pads and the plane formed by the upper surfaces of the supporting bars are the same plane and parallel to the ground. The upper plane of the supporting mechanism is parallel to the ground. The arrangement can ensure that the workpiece to be heat-treated is uniformly heated in the heat treatment process, and can further ensure that the heat treatment temperature of the workpiece is consistent.

In this embodiment, the support pad 20 may be as shown in fig. 2. The upper part of the supporting gasket can be provided with a plurality of concave-shaped openings 21. The plurality of concave-shaped openings 21 can be used for placing support bars. The lower portion of the support pad 20 may be formed with a plurality of boss-shaped openings 22. The boss-shaped openings 22 and the concave-shaped openings 21 are arranged at intervals. The weight of the support gasket can be greatly reduced by the support gasket, and the concave support bar arranged on the upper part can be well installed and can facilitate the detachment and installation of the support bar.

In the above, the size of the concave-shaped opening and the size of the boss-shaped opening can be set according to the size of the trolley and the size of the workpiece to be heat-treated, which are actually required on site. For example, the distance between two adjacent concave openings (the distance between the central lines of two adjacent concave openings) may be 550mm to 650 mm. The distance between the openings of two adjacent boss shapes can be 500 mm-600 mm (the distance between the center lines of two adjacent boss shapes). The distance between the parallel supporting pads may be set to 1600mm to 1800 mm.

In this embodiment, as shown in fig. 3, the refractory layer may include a first refractory sub-layer 1, a second refractory sub-layer 2, and a third refractory sub-layer 3, which are sequentially disposed from top to bottom. The first refractory sublayer 1 may be provided with 3 or more layers, for example, 4 layers. The first refractory sublayer may be made of clay bricks. The first refractory layer 1 may be masonry using refractory mortar 4. The second fireproof sub-layer 2 can be formed by laying light insulating bricks. The light insulating brick can be paved into 2 layers or more. The third refractory layer may be formed of an asbestos layer. Further, the fire-resistant layer may further include a fiber blanket and a bead casting material disposed on the second fire-resistant sub-layer and located on both sides of the first fire-resistant sub-layer in the direction of the trolley entering the furnace, as shown in fig. 3 at 5 and 6. The lower part of the refractory layer of the figure 3 is symmetrically provided with wheel set driving and mounting components.

In this embodiment, the vertical distance between the upper surface of the support mechanism and the upper surface of the refractory layer may be 500mm or more, and the height difference between the flame-throwing nozzle and the workpiece may be 300mm or more. Set up above-mentioned both height and mutually support, can ensure that the work piece has sufficient heat treatment temperature at the unsettled in-process of work piece to set up above-mentioned hollow out construction that highly cooperates supporting mechanism, can make flame pass in work piece bottom and supporting mechanism fretwork, form the convection current flame of circling round, make the heat conduction more symmetrical, thereby guarantee that work piece heat treatment temperature keeps unanimous. Further, the vertical distance from the upper surface of the support mechanism to the upper surface of the refractory layer may be 600mm, and the height difference from the flame nozzle to the workpiece may be 350 mm.

In the present embodiment, as shown in fig. 1(b), the illustrated flame spray nozzle 1 may be disposed on both sides of the support mechanism between two adjacent support spacers. The flame sprayed from the flame spray nozzle is sprayed out from the space between the supporting gaskets, the traditional fire baffle plate is avoided being arranged, and the phenomenon that the workpiece at the fire hole is over-burnt to influence the heat treatment quality of the workpiece can be prevented.

In this embodiment, the supporting spacers and the supporting bars may be made of medium-silicon heat-resistant ductile cast iron (RQTSi 5).

Another aspect of the present invention provides a method of installing a bogie for a heat treatment furnace, which, in an exemplary embodiment of the method of installing a bogie for a heat treatment furnace of the present invention, may include:

and S01, cleaning the surface of the trolley. If the old trolley is modified, the powder of the refractory bricks and the damaged refractory bricks on the surface of the old trolley need to be cleaned. The cleaning may not be performed if the dolly is newly prepared.

And S02, installing a fireproof layer.

And S03, leveling the plane of the fire-resistant layer. The flatness in the leveling process needs to be guaranteed within +/-5 mm. The heat treatment furnace can be subjected to furnace baking treatment, the temperature of the furnace baking can be 550-650 ℃, and the time of the furnace baking treatment can be 3.5-4.5 hours. For example, the oven temperature may be 600 ℃ and the time of treatment may be 4 hours.

And S04, mounting a supporting mechanism. In the mounting process, the supporting spacers are firstly mounted, the distance between two adjacent supporting spacers is determined, and then the supporting bars are mounted. During installation, the fire hole location should be avoided.

Still another aspect of the present invention provides a heat treatment furnace including the above-described bogie for a heat treatment furnace.

In conclusion, the trolley provided by the invention changes the traditional fire baffle plate, and avoids overburning of the workpiece at the fire hole; the arrangement mode and the position of the sizing block mechanism and the flame nozzle can enable flame to pass through the bottom of the workpiece and the pore space in the sizing block mechanism, form convection rotary flame, enable heat conduction to be more uniform and ensure the heat treatment temperature of the workpiece to be consistent; the sizing block mechanism can prevent the workpiece to be heat-treated from directly contacting with the fire-resistant layer, prevent the fire-resistant layer from being damaged by the workpiece to be heat-treated, prevent the fire-resistant layer from being frequently maintained and replaced and save the cost; the hearth of the heat treatment furnace has uniform temperature and good heat treatment quality of workpieces.

Although the present invention has been described above in connection with exemplary embodiments, it will be apparent to those skilled in the art that various modifications and changes may be made to the exemplary embodiments of the present invention without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A trolley for a heat treatment furnace is characterized by comprising a flame nozzle, and the trolley comprises a moving mechanism, a fire-resistant layer and a sizing block mechanism,

the moving mechanism comprises a moving body and a wheel set connected with the moving body;

the fire-resistant layer is arranged on the movable body;

the sizing block mechanism sets up on the flame retardant coating, sizing block mechanism is used for placing the work piece of treating thermal treatment, sizing block mechanism includes that a plurality of support pads that are parallel to each other and wait that perpendicular to platform truck advances the stove direction setting and a plurality of support bars that follow the platform truck advances the stove direction setting on support pads, support pads and advance the stove direction along the platform truck and have predetermined thickness, the plane that the common place of upper surface of each support pad and the plane that the common place of each support bar upper surface are the coplanar just the coplanar is on a parallel with ground, sizing block mechanism is hollow out construction.

2. The trolley for the heat treatment furnace according to claim 1, wherein the fire-resistant layer comprises a first fire-resistant sub-layer, a second fire-resistant sub-layer and a third fire-resistant sub-layer which are sequentially arranged from top to bottom, the first fire-resistant sub-layer is composed of not less than 3 layers of clay bricks, the second fire-resistant sub-layer is formed by laying light insulating bricks, and the third fire-resistant sub-layer is an asbestos layer.

3. The trolley for the heat treatment furnace according to claim 2, wherein the refractory layer further comprises a fiber blanket and a bead castable material which are arranged on the second refractory sub-layer and located on both sides of the first refractory sub-layer in the trolley furnace feeding direction.

4. The trolley for a heat treatment furnace as claimed in claim 1, wherein the coplanar vertical distance from the upper surface of the refractory layer is greater than 500 mm.

5. The bogie for heat treatment furnace according to claim 1, wherein the burners are disposed on both sides of the parallels and have a firing direction between adjacent support spacers.

6. The trolley for the heat treatment furnace as claimed in claim 1, wherein the support pad has concave openings at the upper part for placing the support bars, and convex openings at the lower part for alternately arranging the concave openings and the convex openings.

7. The bogie for heat treatment furnace according to claim 1, wherein the height difference between the burner and the workpiece to be heat treated is 300mm or more.

8. A method of mounting a bogie for heat treatment furnaces as recited in any one of claims 1 to 7, characterized by comprising the steps of:

installing a fireproof layer;

leveling the surface of the fire-resistant layer;

installing a supporting mechanism, wherein the installing of the supporting mechanism comprises determining an installation distance between adjacent supporting gaskets so as to install the supporting gaskets, and installing supporting bars after the supporting gaskets are installed;

and setting the position of a flame nozzle, and setting the position of the flame nozzle between the adjacent parallel supporting gaskets.

9. The method of claim 8, wherein the leveling of the refractory layer comprises a flatness within ± 5 mm.

10. A heat treatment furnace comprising the bogie for a heat treatment furnace according to any one of claims 1 to 7.