Adjustable saddle-shaped preheating device

Abstract

The utility model provides an adjustable saddle-shaped preheating device, and belongs to the technical field of energy accumulator preheating. Two half-saddle-shaped large flame spraying pipes and two half-saddle-shaped small flame spraying pipes are oppositely connected through arc-shaped pipe end baffles respectively, the half-saddle-shaped large flame spraying pipes and the half-saddle-shaped small flame spraying pipes are fixedly connected through transverse connecting steel pipes, and adjustable wind distribution burners are arranged at the bottoms of the transverse connecting steel pipes; the upper end of a longitudinal connecting steel pipe of the adjustable wind distribution burner is vertically communicated with a transverse connecting steel pipe, the lower end of the longitudinal connecting steel pipe is connected with the input end of a gas mixer, a wind distribution plate is arranged at an output port of the gas mixer, the middle position of the wind distribution plate is connected with a gas inlet pipe, and a wind regulation plate and a thin nut are arranged on the outer side of the gas inlet pipe. The semi-saddle-shaped flame spraying pipes of two specifications and sizes are arranged, 360-degree coverage heating of the pipe seat and the edge of the groove of the cylinder body is achieved, the semi-saddle-shaped flame spraying pipe can be fed into the cylinder body from a manhole in a halving mode, the structure is simple, and operation is convenient.

Description

Technical Field

[0001] This utility model relates to the field of energy storage preheating, and in particular to an adjustable saddle-shaped preheating device. Background Technology

[0002] Our company requires preheating before welding the steam inlet pipe seat and cylinder body of an accumulator for a certain project. The maximum diameter of the pipe seat flange is Φ742mm, the wall thickness is 100mm, the cylinder body specifications are Φ1800×100mm, and the cylinder body opening diameter is approximately Φ780mm. Preheating performance requirements: 1. The preheating temperature of the pipe seat and cylinder body within 100mm of the bevel edge must be ≥200℃; 2. The preheating device for the accumulator can only be inserted into the cylinder body through the product manhole, which is an ellipse of 400×300mm with a length of 400mm.

[0003] The accumulator steam inlet pipe seat and cylinder body are made of 12Cr2Mo1V, which has poor thermal conductivity. The existing preheating device cannot meet the preheating performance requirements. Secondly, the existing preheating device has a limited heating range and cannot fully cover the required preheating range, which leads to the post-weld microstructure and performance quality not meeting the production and manufacturing requirements. In addition, the existing preheating device is larger than the manhole size and cannot be installed. Utility Model Content

[0004] This utility model overcomes the above-mentioned problems in the prior art and provides an adjustable saddle-shaped preheating device. To achieve the above objective, the technical solution adopted by this utility model is as follows:

[0005] An adjustable saddle-shaped preheating device includes a semi-saddle-shaped large flame nozzle, a semi-saddle-shaped small flame nozzle, an adjustable air diffuser burner, a transverse connecting steel pipe, and an arc-shaped pipe end baffle. The two semi-saddle-shaped large flame nozzles and the two semi-saddle-shaped small flame nozzles are respectively connected to each other through the arc-shaped pipe end baffle. The semi-saddle-shaped small flame nozzles are set inside the semi-saddle-shaped large flame nozzles and share the same center point. The semi-saddle-shaped large flame nozzles and the semi-saddle-shaped small flame nozzles are connected and fixed by the transverse connecting steel pipe. An adjustable air diffuser burner is set at the bottom of the transverse connecting steel pipe.

[0006] The adjustable air distribution burner includes a longitudinal connecting steel pipe, a mixer, an air distribution plate, an air adjustment plate, a thin nut, and an air inlet pipe. The upper end of the longitudinal connecting steel pipe is perpendicularly connected to the transverse connecting steel pipe, and the lower end of the longitudinal connecting steel pipe is connected to the input end of the mixer. The output port of the mixer is equipped with an air distribution plate, and the air inlet pipe is connected to the middle position of the air distribution plate. An air adjustment plate and a thin nut are installed on the outer side of the air inlet pipe.

[0007] This utility model discloses an adjustable saddle-shaped preheating device. The air inlet pipe includes an air speed-increasing nozzle, an air pipe, and a nut. An air speed-increasing nozzle is provided at one end of the air pipe, and a nut is provided at the other end of the air pipe. The air speed-increasing nozzle is connected to the air distribution plate.

[0008] This utility model discloses an adjustable saddle-shaped preheating device, wherein the speed-increasing nozzle has a stepped hole inside and a stepped thread from top to bottom on the outside of the speed-increasing nozzle, which are respectively threaded to the air distribution plate, the air adjustment plate and the thin nut.

[0009] This utility model discloses an adjustable saddle-shaped preheating device, wherein the air distribution plate is symmetrically provided with four through holes around its perimeter.

[0010] This utility model discloses an adjustable saddle-shaped preheating device. The large end of the air mixer is provided with an internal threaded hole for connection with the air distribution plate, and the other end is provided with an internal threaded hole for connection with the longitudinal connecting steel pipe. The air mixer as a whole has a constricted structure.

[0011] This utility model discloses an adjustable saddle-shaped preheating device, wherein three transverse connecting steel pipes are arranged between the semi-saddle-shaped large flame nozzle and the semi-saddle-shaped small flame nozzle. The middle transverse connecting steel pipe is located at the highest point of the semi-saddle-shaped large flame nozzle and the semi-saddle-shaped small flame nozzle. The other two transverse connecting steel pipes are arranged symmetrically about the middle transverse connecting steel pipe. An adjustable air diffuser burner is arranged at the lower part of the middle transverse connecting steel pipe.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] This utility model discloses an adjustable saddle-shaped preheating device, which can meet the preheating performance requirements of the steam inlet pipe seat and cylinder body of 12Cr2Mo1V material before welding. Compared with the original preheating device structure, it uses an adjustable air distribution burner to adjust the air distribution plate, improves the oxygen and gas mixing ratio, and is equipped with two gas points to improve the flame combustion quality and ensure the preheating temperature. Secondly, the new adjustable saddle-shaped preheating device is equipped with two specifications of semi-saddle-shaped flame nozzles to achieve 360° coverage heating of the pipe seat and cylinder body bevel edge. In addition, the new adjustable saddle-shaped preheating device consists of two halves of saddle-shaped heating fixtures, which can be inserted into the cylinder body through the manhole in half. The structure is simple and easy to operate, solving the technical problems of the limited heating range of the original preheating device, which could not meet the preheating performance requirements, and the inability to install the original preheating device due to its out-of-tolerance dimensions. It can also improve the work efficiency of workers, ensure a safe working environment, guarantee the production quality and cycle of products, and reduce manufacturing costs. This adjustable saddle-shaped preheating device has been applied in the boiler product manufacturing process of our company and has been well received. Attached Figure Description

[0014] Figure 1 This is a top view of an adjustable saddle-shaped preheating device according to the present invention;

[0015] Figure 2 This is a schematic diagram of the adjustable air-dissipating burner in an adjustable saddle-shaped preheating device according to the present invention.

[0016] Figure 3 This is a front view of an adjustable saddle-shaped preheating device according to the present invention;

[0017] Figure 4 This is a schematic diagram of the structure of the semi-saddle-shaped large flame nozzle and the semi-saddle-shaped small flame nozzle in an adjustable saddle-shaped preheating device of this utility model.

[0018] Figure 5 This is a top view of the air distribution plate in an adjustable saddle-shaped preheating device according to this utility model;

[0019] Figure 6 This is a schematic diagram of the air inlet pipe in an adjustable saddle-shaped preheating device according to this utility model;

[0020] In the diagram: 1 is an adjustable air diffuser burner; 2 is a semi-saddle-shaped large flame nozzle; 3 is a semi-saddle-shaped small flame nozzle; 4 is a transverse connecting steel pipe; 5 is an arc-shaped pipe end baffle; 1-1 is a longitudinal connecting steel pipe; 1-2 is an air mixer; 1-3 is an air distribution plate; 1-4 is an air adjustment plate; 1-5 is a thin nut; 1-6 is an air inlet pipe; 1-6-1 is an air speed increaser nozzle; 1-6-2 is an air pipe; 1-6-3 is a nut. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example 1

[0023] like Figure 1-6 As shown, an adjustable saddle-shaped preheating device includes a semi-saddle-shaped large flame nozzle, a semi-saddle-shaped small flame nozzle, an adjustable air diffuser burner, a transverse connecting steel pipe, and an arc-shaped pipe end baffle. The two semi-saddle-shaped large flame nozzles and the two semi-saddle-shaped small flame nozzles are respectively connected to each other through the arc-shaped pipe end baffle. The semi-saddle-shaped small flame nozzles are set inside the semi-saddle-shaped large flame nozzles and share the same center point. The semi-saddle-shaped large flame nozzles and the semi-saddle-shaped small flame nozzles are connected and fixed by the transverse connecting steel pipe. An adjustable air diffuser burner is set at the bottom of the transverse connecting steel pipe.

[0024] The adjustable air distribution burner includes a longitudinal connecting steel pipe, a mixer, an air distribution plate, an air adjustment plate, a thin nut, and an air inlet pipe. The upper end of the longitudinal connecting steel pipe is perpendicularly connected to the transverse connecting steel pipe, and the lower end of the longitudinal connecting steel pipe is connected to the input end of the mixer. The output port of the mixer is equipped with an air distribution plate, and the air inlet pipe is connected to the middle position of the air distribution plate. An air adjustment plate and a thin nut are installed on the outer side of the air inlet pipe.

[0025] This utility model discloses an adjustable saddle-shaped preheating device. The air inlet pipe includes an air speed-increasing nozzle, an air pipe, and a nut. An air speed-increasing nozzle is provided at one end of the air pipe, and a nut is provided at the other end of the air pipe. The air speed-increasing nozzle is connected to the air distribution plate.

[0026] This utility model discloses an adjustable saddle-shaped preheating device, wherein the speed-increasing nozzle has a stepped hole inside and a stepped thread from top to bottom on the outside of the speed-increasing nozzle, which are respectively threaded to the air distribution plate, the air adjustment plate and the thin nut.

[0027] This utility model discloses an adjustable saddle-shaped preheating device, wherein the air distribution plate is symmetrically provided with four through holes around its perimeter.

[0028] This utility model discloses an adjustable saddle-shaped preheating device. The large end of the air mixer is provided with an internal threaded hole for connection with the air distribution plate, and the other end is provided with an internal threaded hole for connection with the longitudinal connecting steel pipe. The air mixer as a whole has a constricted structure.

[0029] This utility model discloses an adjustable saddle-shaped preheating device, wherein three transverse connecting steel pipes are arranged between the semi-saddle-shaped large flame nozzle and the semi-saddle-shaped small flame nozzle. The middle transverse connecting steel pipe is located at the highest point of the semi-saddle-shaped large flame nozzle and the semi-saddle-shaped small flame nozzle. The other two transverse connecting steel pipes are arranged symmetrically about the middle transverse connecting steel pipe. An adjustable air diffuser burner is arranged at the lower part of the middle transverse connecting steel pipe.

[0030] The new adjustable saddle-shaped preheating device is equipped with two sizes of heating arc tubes: a semi-saddle-shaped large flame nozzle and a semi-saddle-shaped small flame nozzle. The highest point of the heating arc tube is located and aligned using the connecting steel pipe in the adjustable air diffuser burner. This structure results in a more uniform distribution of heating points and a more comprehensive heating area.

[0031] The adjustable air diffuser burner is a detachable assembly type. During the installation of the preheating device, the detachable part of the adjustable air diffuser burner is assembled later, so that its maximum cross-sectional area is 212×196mm when it is sent into the cylinder, ensuring that it is smaller than the manhole size of 400×300mm. After being sent into the cylinder, the two preheating devices are positioned and fixed by the arc tube end baffle, ensuring that its preheating range can reach Φ600-Φ900mm.

[0032] The intake pipe of the adjustable air diffuser burner consists of an air speed increaser nozzle, an intake pipe, and a nut. The nut is designed with an M14×1 threaded hole, which serves to connect with the workshop air filling pipe. The threaded connection is simpler and more secure than the clamp connection. After welding the intake pipe, air speed increaser nozzle, and nut, a sealed cavity is formed, allowing the gas entering from the nut to first converge in the sealed cavity before reaching the mixer through the air speed increaser nozzle. The air speed increaser nozzle has Φ8-Φ4mm stepped holes inside, which increase the gas flow rate and improve combustion quality by reducing the cross-sectional area. The outside has M20-M16 stepped threads, which are used for connecting and fixing the air distribution plate, air adjustment plate, and thin M20 nut, respectively.

[0033] The air distribution plate has 4×Φ12mm through holes. By adjusting the distance between the air distribution plate and the air regulating plate, the oxygen and gas mixing ratio can be controlled to improve the combustion quality. At the same time, the thin nut M20 is used to position and lock the air regulating plate.

[0034] The large end of the mixer has an M56×1 internal thread hole to connect with the air distribution plate, and the other end has a G3 / 4 internal thread hole to connect with the connecting steel pipe. The overall design is a constricted structure, which is conducive to the full mixing of gas and oxygen.

[0035] Example 2

[0036] like Figure 1-6 As shown, a specific method of using an adjustable saddle-shaped preheating device is as follows:

[0037] 1. First, assemble and weld the semi-saddle-shaped large flame nozzle and the semi-saddle-shaped small flame nozzle to the end baffle of the arc pipe. Then, position and weld the connecting steel pipe to the highest point of the connection port in the circumferential direction of the semi-saddle-shaped large flame nozzle and the semi-saddle-shaped small flame nozzle, and connect and fix the semi-saddle-shaped large flame nozzle and the semi-saddle-shaped small flame nozzle with connecting pipes. After the entire assembly and welding is completed, it is sent into the cylinder through the manhole for later use.

[0038] 2. Weld the speed-increasing nozzle and nut to the air intake pipe respectively. After welding, inspect the weld to ensure there is no leakage.

[0039] 3. The thin M20 nut and the air regulating plate are installed on the air intake pipe by means of threaded connection, and are ready for adjustment.

[0040] 4. After the mixer is threadedly connected to the air distribution plate, it is locked and fixed to the speed-increasing nozzle. After the whole assembly is completed, it is sent into the cylinder through the manhole and threadedly connected to the connecting steel pipe. At this point, the installation of one adjustable semi-saddle-shaped preheating hydrogen removal device is completed.

[0041] 5. Repeat steps 1-4. After sending the two adjustable saddle-shaped preheating devices into the cylinder, use the arc tube end baffle to position and fix the two adjustable saddle-shaped preheating devices to complete the preparation for 360° all-round coverage.

[0042] 6. Connect the adjustable air diffuser burner to the two gas points in the workshop respectively. Perform the preheating process required before welding the accumulator steam inlet pipe seat and cylinder body. Adjust the air distribution plate to change the oxygen and fuel gas mixing ratio, improve the flame combustion quality, and ensure the preheating temperature. After the preheating performance requirements are met, proceed with the welding operation of the target product.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An adjustable saddle-type preheating device, characterized by: The adjustable saddle-shaped preheating device comprises half-saddle-shaped large-flame nozzles (2), half-saddle-shaped small-flame nozzles (3), adjustable air distribution burners (1), transverse connecting steel pipes (4) and arc-shaped pipe end baffles (5), two half-saddle-shaped large-flame nozzles (2) and two half-saddle-shaped small-flame nozzles (3) are connected oppositely through the arc-shaped pipe end baffles (5), the half-saddle-shaped small-flame nozzles (3) are arranged in the half-saddle-shaped large-flame nozzles (2) and share the same center point, the half-saddle-shaped large-flame nozzles (2) and the half-saddle-shaped small-flame nozzles (3) are connected and fixed through the transverse connecting steel pipes (4), the bottom of the transverse connecting steel pipe (4) is provided with the adjustable air distribution burner (1). The adjustable air distribution burner (1) comprises a longitudinal connecting steel pipe (1-1), a gas mixer (1-2), an air distribution plate (1-3), an air adjusting plate (1-4), a thin nut (1-5) and an air inlet pipe (1-6), the upper end of the longitudinal connecting steel pipe (1-1) is in vertical communication with the transverse connecting steel pipe (4), the lower end of the longitudinal connecting steel pipe (1-1) is connected with the input end of the gas mixer (1-2), the output port of the gas mixer (1-2) is provided with the air distribution plate (1-3), the middle position of the air distribution plate (1-3) is connected with the air inlet pipe (1-6), the outer side of the air inlet pipe (1-6) is provided with the air adjusting plate (1-4) and the thin nut (1-5).

2. The adjustable saddle preheat of claim 1, wherein, The air inlet pipe (1-6) comprises a speed-increasing nozzle (1-6-1), a gas pipe (1-6-2) and a nut (1-6-3), one end of the gas pipe (1-6-2) is provided with the speed-increasing nozzle (1-6-1), the other end of the gas pipe (1-6-2) is provided with the nut (1-6-3), and the speed-increasing nozzle (1-6-1) is connected with the air distribution plate (1-3).

3. An adjustable saddle preheater according to claim 2, characterized in that The speed-increasing nozzle (1-6-1) is internally provided with a stepped hole, and is externally provided with stepped threads from top to bottom, which are respectively threadedly connected with the air distribution plate (1-3), the air adjusting plate (1-4) and the thin nut (1-5).

4. The adjustable saddle preheat of claim 1, wherein, Four through holes are symmetrically arranged around the air distribution plate (1-3).

5. The adjustable saddle preheat of claim 1, wherein, The large opening end of the gas mixer (1-2) is provided with an internally threaded hole for cooperation and connection with the air distribution plate (1-3), the other end is provided with an internally threaded hole for cooperation and connection with the longitudinal connecting steel pipe (1-1), and the whole gas mixer (1-2) is of a necked structure.

6. The adjustable saddle preheat of claim 1, wherein, Three transverse connecting steel pipes (4) are arranged between the half-saddle-shaped large-flame nozzles (2) and the half-saddle-shaped small-flame nozzles (3), the middle transverse connecting steel pipe (4) is arranged at the highest point of the half-saddle-shaped large-flame nozzles (2) and the half-saddle-shaped small-flame nozzles (3), the other two transverse connecting steel pipes (4) are symmetrically arranged about the middle transverse connecting steel pipe (4), and the middle transverse connecting steel pipe (4) is provided with the adjustable air distribution burner (1) at the lower part.

Images