Heating tool for surfacing seal head of positioner platform

Abstract

The utility model discloses a positioner platform surfacing seal head heating tool which is characterized in that a plurality of heaters are connected end to end to form an annular structure, so that an integral annular heater is formed, a cavity is formed in the heater, a burner and a fuel inlet are arranged on the heater, and the burner and the fuel inlet are both communicated with the cavity in the heater. The facing direction of the burner is perpendicular to the overall annular heater, after high-pressure fuel gas is introduced into the heater from the fuel inlet, the sprayed fuel gas is ignited at the burner of the heater, the overall annular heater can be arranged on the outer side of the end socket in a sleeving mode in the using process, and uniform heating of the surfacing end socket can be achieved through the scheme. And the integral annular heater is sleeved on the outer side of the sealing head, so that the sealing head cannot be contacted by a worker basically, the ground space is not occupied, and the safety is higher.

Description

Technical Field

[0001] This utility model belongs to the field of pressure vessel product processing equipment, and in particular relates to a heating fixture for the weld overlay head of a positioner platform. Background Technology

[0002] In the manufacturing process of pressure vessels, especially in the petrochemical and refining industries, core equipment such as hydrogenation reactors and hot / cold high-pressure separators require corrosion-resistant metal overlay welding to meet process requirements. Due to the curvature of the end caps, the overlay welding of the end caps must be performed as a whole on a positioner platform. The majority of materials used in core equipment are high-strength steel, chromium-molybdenum steel, and vanadium-reinforced steel. These materials require a preheating temperature of ≥150℃ before welding to ensure the quality of the weld layer and the overall product quality. The original heating fixtures were installed on both sides of the positioner and the end caps, using individual natural gas combustion nozzles for heating each time. This resulted in uneven preheating, and the placement of the original heating fixtures on the ground posed a certain degree of danger. Furthermore, the original heating fixtures needed to be moved when the position of the positioner changed. Utility Model Content

[0003] (1) Technical problem to be solved: In view of the defects of uneven heating and unsafety of the heating tooling used in the current head welding of the positioner, this utility model provides a heating tooling for the head welding of the positioner platform to make up for the above defects.

[0004] (2) The technical solution adopted by this utility model is as follows:

[0005] A heating fixture for a positioner platform weld overlay head is characterized by comprising multiple heaters connected end to end to form a ring structure, each heater having an internal cavity, and each heater being provided with a burner and a fuel inlet, both of which are connected to the internal cavity of the heater.

[0006] A further technical solution includes a buffer steam drum, which is equipped with a main inlet pipe and a branch outlet pipe. The number of branch outlet pipes corresponds to the number of fuel inlets, and each branch outlet pipe corresponds to a fuel inlet. The corresponding branch outlet pipe is connected to the fuel inlet through a branch pipe, and the main inlet pipe is connected to the fuel source.

[0007] A further technical solution is that a ball valve is installed at the main inlet pipe and a flashback valve is installed at the branch outlet pipe.

[0008] A further technical solution involves connecting two adjacent heaters via an adjustable structure.

[0009] A further technical solution is that the adjustable structure includes a first connecting piece and a second connecting piece respectively provided at both ends of the heater. Both the first connecting piece and the second connecting piece are provided with elongated holes. In two adjacent heaters, the first connecting piece of one heater is connected to the second connecting piece of the other heater by an adjusting bolt. The adjusting bolt passes through the elongated hole and is threaded with an adjusting nut.

[0010] A further technical solution is that the adjustable structure includes a square sliding sleeve fixedly mounted on the heater, a square sliding rod slidably connected inside the square sliding sleeve, a first connecting rod mounted on the square sliding sleeve, a second connecting rod mounted on the square sliding rod, and in two adjacent heaters, the first connecting rod of one heater and the second connecting rod of the other heater are hinged by a pin.

[0011] (3) Due to the adoption of the above technical solution, the beneficial effects of this utility model are as follows: By connecting multiple heaters end to end to form a ring structure, an integral ring heater is formed. The heater has a cavity inside and a burner and a fuel inlet are provided on the heater. The burner and the fuel inlet are connected to the cavity inside the heater. The burner is perpendicular to the integral ring heater. After the high-pressure gas is introduced into the heater from the fuel inlet, the gas is ignited at the burner of the heater. When in use, the integral ring heater can be put on the outside of the end cap, with the burner facing the outer wall of the end cap. The heater can be directly fixed to the end cap by spot welding. The end cap is a hemispherical hollow structure, and the positioner has a middle gap. The gas pipeline connected to the fuel inlet is passed through the middle gap of the positioner to connect to the gas supply equipment, avoiding the gas pipeline from getting tangled and hindering the operator from welding and operating the positioner and the belt welding equipment. The above solution can achieve uniform heating of the welded end cap. Moreover, the integral ring heater is put on the outside of the end cap and is basically inaccessible to the workers. It does not occupy ground space and is safer. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the connection between two adjacent heaters of this utility model;

[0014] Figure 3 This is a structural schematic diagram of the connection between two adjacent heaters of this utility model from another perspective;

[0015] Figure 4 This is a schematic diagram of the structure of the buffer steam drum described in this utility model;

[0016] Figure 5 This is a schematic diagram of the structure of two adjacent heaters of this utility model connected in another way;

[0017] Figure 6 This is a schematic diagram of the present invention in use. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0019] like Figures 1-6 As shown. A heating fixture for a positioner platform overlay welding head, characterized in that it includes multiple heaters 1 connected end-to-end to form a ring structure. Each heater 1 has an internal cavity. Each heater 1 is equipped with a burner 2 and a fuel inlet 3, both of which communicate with the internal cavity. It also includes a buffer steam drum 4, which is equipped with a main inlet pipe 5 and branch outlet pipes 6. The number of branch outlet pipes 6 corresponds to the number of fuel inlets 3, and each branch outlet pipe 6 corresponds one-to-one with a fuel inlet 3. The corresponding branch outlet pipe 6 is connected to the fuel inlet 3 via a branch pipe 7. The main inlet pipe 5 is connected to a fuel source.

[0020] In use, multiple heaters 1 are connected end to end to form a ring structure, thus forming an integral ring heater 1. The integral ring heater 1 can be fitted over the outside of the end cap, with the burner 2 facing the outer wall of the end cap. The heater 1 can be directly fixed to the end cap by spot welding. The end cap is a hemispherical hollow structure, and the positioner has a central cavity. There is a gap between the positioner and the end cap. The end cap welding is carried out inside the end cap, so the gas pipeline should avoid the area around the open end cap. Because the positioner can change the position of the end cap, the gas pipeline (branch line 7) connecting to the fuel inlet 3 can be passed through the central cavity of the positioner and then... A gap exists between the positioner and the end cap, through which the connecting buffer steam drum 4 passes. The buffer steam drum 4 is placed below the positioner to prevent the branch pipe 7 from affecting the operation of the positioner. The corresponding branch outlet pipe 6 is connected to the fuel inlet 3 through the branch pipe 7. The main inlet pipe 5 is connected to the fuel source. After the high-pressure gas is introduced into the heater 1 from the fuel inlet 3, the gas sprayed out at the burner 2 of the heater 1 can be ignited to preheat the end cap. The positioner platform overlay welding end cap heating fixture proposed in this utility model can be moved simultaneously with the positioner because it is fixed to the end cap by electric welding or spot welding to the positioner. When not in use, it can be removed by hammering it off.

[0021] A ball valve 8 is installed at the main inlet pipe 5. The ball valve 8 is used to close or open the gas flow. A flashback valve 9 is installed at the branch outlet pipe 6. The flashback valve 9 is used to prevent flame backflow.

[0022] Two adjacent heaters 1 are connected by an adjustable structure. This allows for adjustment of the distance between the two heaters 1, ultimately forming a complete annular heater 1.

[0023] The adjustable structure includes a first connecting piece 10 and a second connecting piece 11 respectively provided at both ends of the heater 1. Both the first connecting piece 10 and the second connecting piece 11 are provided with elongated holes 12. In two adjacent heaters 1, the first connecting piece 10 of one heater 1 and the second connecting piece 11 of the other heater 1 are connected by an adjusting bolt 13. The adjusting bolt 13 passes through the elongated hole 12 and is threaded with an adjusting nut 14. By loosening the adjusting nut 14, the distance between the two adjacent heaters 1 can be changed by adjusting the distance between the overlapping of the first connecting piece 10 and the second connecting piece 11.

[0024] The adjustable structure includes a square sliding sleeve 15 fixedly mounted on the heater 1, a square sliding rod 16 slidably connected inside the square sliding sleeve 15, a first connecting rod 17 on the square sliding sleeve 15, and a second connecting rod 18 on the square sliding rod 16. In two adjacent heaters 1, the first connecting rod 17 of one heater 1 and the second connecting rod 18 of the other heater 1 are hinged by a pin 19. A set screw 20 is threaded onto the square sliding sleeve 15, and the end of the set screw 20 contacts the square sliding rod 16 to lock the position of the square sliding rod 16. The distance between two adjacent heaters 1 can be adjusted by adjusting the length of the extended square sliding rod 16.

[0025] The above are merely preferred embodiments of this utility model.

Claims

1. A positioner platform overlay head heating fixture, characterized by, The application relates to a heating device, which comprises a plurality of heaters (1) connected end to end to form a ring structure, wherein the heaters (1) have cavities inside, and burners (2) and fuel inlets (3) are arranged on the heaters (1) and communicate with the cavities inside the heaters (1).

2. The head heating tooling for a platform overlay of a roll positioner as defined in claim 1, wherein, The device further comprises a buffer steam pocket (4) provided with a main inlet pipe (5) and shunt outlet pipes (6), wherein the number of the shunt outlet pipes (6) corresponds to the number of the fuel inlets (3), the shunt outlet pipes (6) correspond to the fuel inlets (3) one by one, the corresponding shunt outlet pipes (6) and fuel inlets (3) are connected through branch pipes (7), and the main inlet pipe (5) is connected with a fuel source.

3. The head heating tooling for a platform overlay of a roll positioner as defined in claim 2, wherein, Ball valves (8) are arranged at the main inlet pipe (5), and tempering valves (9) are arranged at the shunt outlet pipes (6).

4. The skid surfacing head heating tooling of claim 1 or 2, wherein, Two adjacent heaters (1) are connected through an adjustable structure.

5. The skid surfacing head heating tooling of claim 4, wherein, The adjustable structure comprises first connecting plates (10) and second connecting plates (11) arranged at two ends of the heaters (1) respectively, the first connecting plates (10) and the second connecting plates (11) are provided with long circular holes (12), the first connecting plate (10) of one of the two adjacent heaters (1) is connected with the second connecting plate (11) of the other heater (1) through an adjusting bolt (13) penetrating through the long circular holes (12), and an adjusting nut (14) is threadedly connected on the adjusting bolt (13).

6. The line heating tool of claim 4, wherein: The adjustable structure comprises square sliding sleeves (15) fixedly arranged on the heaters (1), square sliding rods (16) slidably connected inside the square sliding sleeves (15), first connecting rods (17) arranged on the square sliding sleeves (15), second connecting rods (18) arranged on the square sliding rods (16), the first connecting rod (17) of one of the two adjacent heaters (1) is hingedly connected with the second connecting rod (18) of the other heater (1) through a pin shaft (19).

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