Open type welded junction flame preheater

Abstract

An open type welded junction flame preheater is mainly composed of a preheater fixed part, a preheater movable part, a fuel gas part and a steel wire rope. A handle of the fixed part of the preheater is fixed on a preheater main body, the movable part of the preheater is a split ring, and the gas part consists of a gas valve, a hose and a flame nozzle; a tee joint is connected in the hose, one end of the tee joint is connected with the air valve, and the other two ends of the tee joint are connected with connectors in the fixed part and the movable part respectively. The flame sprayers are distributed on the inner ring of the split ring and the semicircular inner ring of the fixed part, the steel wire rope penetrates through a ring hole welded to the fixed part, and the two ends of the steel wire rope are connected with the handle and the split ring respectively. The device can quickly preheat the welded junction, saves working hours and energy consumption, is high in universality, simple to maintain and high in preheating efficiency, meets the requirements of national green construction, and has better technical and economic benefits and popularization and application values.

Description

Technical Field

[0001] This utility model is an open-type weld joint flame preheater, suitable for flame preheating of small-diameter pipe weld joints that require preheating before welding. It solves the problem of uneven preheating when using a cutting torch. The open-type weld joint preheater can conveniently and efficiently perform preheating of weld joints. Background Technology

[0002] According to the specifications, for alloy steel welds, large and medium diameter pipes are preheated by electric heating, while small diameter pipes are preheated by flame. (The specifications require that when using induction preheating or flame preheating, the preheating width on each side should not be less than three times the pipe wall thickness and not less than 100mm.) Using a cutting torch to heat 100mm of pipe sections on both sides of the weld to the temperature required by the specifications results in uneven preheating and slow preheating speed. Summary of the Invention

[0003] This utility model provides an open-type weld joint flame preheater. When preheating the weld joint, the preheater is held tightly by the handle, the open ring is opened and then inserted into the pipe section where the weld joint needs to be preheated. After releasing the wrench, multiple flame nozzles are ignited to preheat along both sides of the weld joint. This solves the problems of high worker skill requirements, low construction efficiency and poor preheating effect of traditional cutting torch flame preheating.

[0004] The device consists of a fixed part, a movable part, a gas supply section, and steel wire ropes assembled together. The fixed part comprises the preheater body and a handle; the movable part is an open ring; and the gas supply section consists of a gas valve, a hose, a tee, and a flame nozzle.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: the device mainly consists of a fixed part, a movable part, a gas supply part, and a steel wire rope.

[0006] Fixed part: This part consists of the preheater body and handle, which are connected by bolts and nuts. The semi-circular part of the preheater body has an internal gas passage for gas to pass through. The straight part has a base for connecting the gas valve on one side and a clamping hole for guiding the wire rope on the other side. The end of the semi-circular part has a slot for connecting the hose. The inner circle of the semi-circular part has four threaded holes for connecting the flame nozzle. The flame nozzle is connected to the internal gas passage. The handle is fixed to the preheater body by the handle fixing bolts and nuts.

[0007] The moving part consists of an open ring, which is connected to the fixed part by bolts and nuts. The open ring has a pre-drilled internal gas passage for gas to pass through and a threaded hole for connecting the hose. The flame nozzle is screwed into the threaded hole to directly connect with the internal gas passage inside the open ring.

[0008] Gas components: gas valve, hose, tee, and flame nozzle.

[0009] The wire rope passes through the clamp holes welded to the fixed part, and the two ends are connected to the handle and the open ring, respectively.

[0010] After the open-type weld joint flame preheater is assembled: open the annular preheater by gripping the handle, insert it into the pipe section that needs to be preheated for welding, open the gas valve, ignite the flame nozzle, move it evenly, heat it to the specified temperature, close the gas valve, grip the wrench, and the preheater can be removed for welding.

[0011] The entire device consists of detachable parts, making it easy to install, remove, and replace parts.

[0012] The structural materials have been optimized multiple times, making it lightweight, durable, easy to operate, and convenient and efficient for preheating weld joints.

[0013] The beneficial effects of this invention are as follows: This device provides a stable and reliable structure, ensuring that the preheating temperature meets the specified requirements. The device uses a mechanical structure, and operators can be trained and put into operation quickly. It is highly user-friendly and versatile, can be used long-term, is easy to maintain, improves preheating efficiency, and effectively reduces construction costs. This device can rapidly preheat weld joints, accelerate construction progress, save energy consumption, and meets national green construction requirements, demonstrating good technical and economic benefits and significant value for widespread application. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] Figure 1 A schematic diagram of an open-type weld joint flame preheater.

[0016] Figure 2 A schematic diagram of the use of an open-type weld joint flame preheater.

[0017] Figure 3 A schematic diagram of the disassembly of an open-type welded flame preheater.

[0018] Figure 4 A schematic diagram of the disassembly of the moving part of an open-type welded flame preheater.

[0019] Figure 5 A schematic diagram of the disassembly of the fixed part of the open-type welded flame preheater.

[0020] Figure 3 The components are: 1. Preheater body (1 piece), 2. Opening ring (1 piece), 3. Handle (1 piece), 4. Flame nozzle (8 pieces), 5. Handle fixing bolts and nuts (1 set), 6. Opening ring fixing bolts and nuts (1 set). Detailed Implementation

[0021] exist Figure 1As shown, the device consists of a fixed preheater part (A), a movable preheater part (B), an air valve (C), a hose and tee (D), and a steel wire rope (E).

[0022] exist Figure 4 As shown, flame nozzles (4 pieces) are installed on the open ring (1 piece) to complete the assembly of the preheater moving part (B).

[0023] exist Figure 5 As shown, the handle (1 piece) is installed and fixed to the preheater body (1 piece) with handle fixing bolts and nuts (1 set), forming the fixed part (A). The open ring is connected to the preheater body (1 piece) by bolts and nuts (1 set), and the flame nozzles (4 pieces) are screwed into the inner ring of the preheater fixed part (A) and the preheater moving part (B) respectively.

[0024] exist Figure 1 As shown, the movable part (B) of the preheater and the fixed part (A) of the preheater are connected using bolts and nuts (1 set) with open rings. The gas valve (C) is connected to the base welded to one side of the fixed part. A tee (D) is added in the middle of the hose. One end of the hose is connected to the gas valve (C), and the other two outlets of the hose are connected to the slots reserved in the fixed part (A) and the movable part (B) of the preheater, respectively. The steel wire rope (E) passes through the clamp hole welded on the fixed part (A), and the two ends are connected to the handle and the open ring, respectively. When the handle is squeezed, the steel wire rope (E) is driven to open the movable part (B) of the preheater.

[0025] exist Figure 2 As shown, the external gas pipe is connected to the valve. Hold the handle (1 piece) tightly, drive the wire rope (E) to open the movable part (B) of the preheater, put it into the pipe section that needs to be preheated for welding, release the handle, the movable part (B) closes, open the gas valve, ignite the flame nozzle, and heat the weld at a uniform speed. After the preheating temperature meets the specification requirements, close the gas valve, hold the handle tightly to drive the wire rope (E) to open the movable part (B), and remove the device from the pipe section, thus completing the preheating of the weld.

Claims

1. An open-type weld joint flame preheater, characterized in that: The complete set of equipment consists of a fixed part, a movable part, a gas section, and a steel wire rope. The fixed part is a preheater body and a handle connected by bolts and nuts. The movable part is an open ring. The gas section consists of a gas valve, a hose, a tee, and a flame nozzle. The device uses the handle to open the movable part through the steel wire rope. Both the fixed and movable parts have reserved air inlets and hose slots.

2. The open-type weld joint flame preheater according to claim 1, characterized in that: The fixed and movable parts are connected by bolts and nuts with an open ring; the movable part is opened and closed by gripping and releasing the handle, driven by a steel wire rope.

3. The open-type weld joint flame preheater according to claim 1, characterized in that: The weld joint is preheated uniformly by using flame nozzles evenly distributed in the inner ring of the fixed and moving parts. The flame nozzles are connected to the fixed and moving parts by threads.

4. The open-type weld joint flame preheater according to claim 1, characterized in that: The fixed part and the movable part each have a slot for inserting a gas hose, and each has an internal gas passage for gas to pass through. The inner ring of each part has a threaded hole for connecting to the flame nozzle.

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