阅读说明：本技术 加厚生产线中频感应加热器用防撞机构 (Anti-collision mechanism for medium-frequency induction heater of thickening production line ) 是由 周中吉 吕开宇 于 2020-12-24 设计创作，主要内容包括：本发明涉及石油天然气钻杆加工技术领域,具体说是石油天然气钻杆在加厚工艺中使用的加厚生产线中频感应加热器用防撞机构。它的特点是包括底座,该底座上固定有并排布置的支柱,支柱的顶端间连接有水平转轴,水平转轴与支柱间均呈转动配合。所述水平转轴的上方固定有支架,支架上有水平布置的限位孔。所述水平转轴的下方固定有第一摆杆,第一摆杆下端对应的底座上有接触开关。将该防撞机构安装在中频感应加热器的进口前端,可有效防止弯曲严重的管料接近感应加热器,彻底杜绝管料与感应加热器之间的撞击,同时不会增加能源消耗和加厚成本。(The invention relates to the technical field of petroleum and natural gas drill rod processing, in particular to an anti-collision mechanism for a medium-frequency induction heater of a thickening production line used in a thickening process of a petroleum and natural gas drill rod. The novel support is characterized by comprising a base, wherein pillars are fixed on the base and arranged side by side, a horizontal rotating shaft is connected between the top ends of the pillars, and the horizontal rotating shaft and the pillars are in running fit. A support is fixed above the horizontal rotating shaft, and a limit hole is horizontally arranged on the support. A first swing rod is fixed below the horizontal rotating shaft, and a contact switch is arranged on the base corresponding to the lower end of the first swing rod. Install this anticollision institution at intermediate frequency induction heater's import front end, can prevent effectively that crooked serious pipe material from being close induction heater, thoroughly stop the striking between pipe material and the induction heater, can not increase energy resource consumption and thickening cost simultaneously.)

1. The anti-collision mechanism for the medium-frequency induction heater in the thickening production line is characterized by comprising a base (1), wherein pillars (4) arranged side by side are fixed on the base (1), a horizontal rotating shaft (6) is connected between the top ends of the pillars (4), and the horizontal rotating shaft (6) is in rotating fit with the pillars (4); a bracket is fixed above the horizontal rotating shaft (6), and a limit hole (8) which is horizontally arranged is formed in the bracket; a first swing rod (3) is fixed below the horizontal rotating shaft (6), and a contact switch (2) is arranged on the base (1) corresponding to the lower end of the first swing rod (3).

2. The anti-collision mechanism for the medium-frequency induction heater of the thickening production line as claimed in claim 1, wherein the bracket is a square frame (7), a screw hole is formed in the middle of each edge of the square frame (7), a screw rod (9) is arranged in each screw hole, two ends of each screw rod (9) extend out of each screw hole, and each screw rod is provided with a locking nut (10); the axes of the screw rods (9) pass through the center point of the square frame (7), and the circles where the inner end connecting lines of the screw rods (9) are located form the limiting holes (8).

3. The anti-collision mechanism for the medium-frequency induction heater in the thickening production line as claimed in claim 1 or 2, wherein a second swing rod (5) is further fixed below the horizontal rotating shaft (6), a spring support (11) is arranged on the base (1) corresponding to the lower end of the second swing rod (5), and a return spring (12) is connected between the spring support (11) and the lower end of the second swing rod (5).

Technical Field

The invention relates to the technical field of petroleum and natural gas drill rod processing, in particular to an anti-collision mechanism for a medium-frequency induction heater of a thickening production line used in a thickening process of a petroleum and natural gas drill rod.

Background

The thickening is an important process for producing the petroleum and natural gas drill by adopting a drill rod, a thickened oil pipe for petroleum and natural gas, a thickened sleeve, a drill rod for trenchless construction and the like. The process of increasing the outer diameter, or decreasing the inner diameter, or increasing the outer diameter and decreasing the inner diameter of the pipe end of the drill pipe body, or in short, increasing the wall thickness of the pipe material is called thickening, and the thickening is usually carried out at high temperature, and is a hot forging production process. The medium-frequency induction heating speed is fast, the efficiency is high, the oxidation is less, the temperature control precision is high, the automatic operation is easy to realize, and therefore, the medium-frequency induction heating mode is often adopted in the thickening process, and the medium-frequency induction heater is required to be used.

The outer diameter of the pipe has tolerance, the center of the feeding device and the center of the induction heater also have deviation, and in order to ensure that the pipe can be smoothly conveyed into the induction heater, the aperture of the induction heater is larger than that of the pipe to be heated. The aperture of the induction heater is generally 20mm larger than the nominal outer diameter of the pipe material to be heated, i.e. the unilateral clearance is 10 mm. The unilateral clearance between the aperture of the induction heater and the nominal outer diameter of the pipe material to be heated can ensure the normal heating of most pipe materials. However, bending is inevitable in the case of a pipe material, and in the case of a pipe material which is extremely severely bent, the end face of the pipe material is inevitably significantly warped. The pipe material can collide the end face of the induction heater in the process of being conveyed to the induction heater, and the induction heater can be damaged by collision when the pipe material is serious, so that economic loss is caused, and meanwhile, the normal operation of thickening operation is influenced.

Two solutions are given in the prior art. One is to increase the aperture of the induction heater. However, the increase of the aperture of the induction heater increases the gap between the pipe material and the inner wall of the central hole of the induction heater, which inevitably causes the reduction of the thermal efficiency and increases the energy consumption of the thickening production. And the other method is that an operator is added at the thickening station to supervise the pipe material feeding operation, whether the pipe material has a severe bending phenomenon or not is detected, and the pipe material with severe bending is lifted away by a crane. This scheme increases an operative employee, has increased the thickening cost. And artificial vision supervision can not be done without loss, when the bending state of the pipe is near the critical point, human eyes can not make a judgment timely and accurately, and the risk of collision between the pipe and the induction heater still exists.

Disclosure of Invention

The invention aims to solve the problem of providing an anti-collision mechanism for a medium-frequency induction heater in a thickening production line, wherein the anti-collision mechanism is arranged at the front end of an inlet of the medium-frequency induction heater, so that a seriously bent pipe can be effectively prevented from approaching the induction heater, the impact between the pipe and the induction heater is thoroughly avoided, and the energy consumption and the thickening cost cannot be increased.

In order to solve the problems, the following technical scheme is adopted:

the anti-collision mechanism for the medium-frequency induction heater of the thickening production line is characterized by comprising a base, wherein pillars are fixed on the base and are arranged side by side, a horizontal rotating shaft is connected between the top ends of the pillars, and the horizontal rotating shaft is in rotating fit with the pillars. A support is fixed above the horizontal rotating shaft, and a limit hole is horizontally arranged on the support. A first swing rod is fixed below the horizontal rotating shaft, and a contact switch is arranged on the base corresponding to the lower end of the first swing rod.

The support is a square frame, a screw hole is formed in the middle of each edge of the square frame, a screw rod is arranged in each screw hole, two ends of each screw rod extend out of the screw holes, and locking nuts are arranged on the two ends of each screw rod. The axes of the screw rods pass through the center point of the square frame, and the circles where the inner ends of the screw rods are connected form the limiting holes.

Furthermore, a second swing rod is fixed below the horizontal rotating shaft, a spring support is arranged on the base corresponding to the lower end of the second swing rod, and a return spring is connected between the spring support and the lower end of the second swing rod.

By adopting the scheme, the method has the following advantages:

the anti-collision mechanism for the medium-frequency induction heater of the thickening production line comprises a base, wherein pillars are fixed on the base and arranged side by side, a horizontal rotating shaft is connected between the top ends of the pillars, and the horizontal rotating shaft is in rotating fit with the pillars; a bracket is fixed above the horizontal rotating shaft, and a limit hole which is horizontally arranged is arranged on the bracket; a first swing rod is fixed below the horizontal rotating shaft, and a contact switch is arranged on the base corresponding to the lower end of the first swing rod. When the anti-collision mechanism is used, the anti-collision mechanism is arranged at the front end of an inlet of the medium-frequency induction heater, and a contact switch of the anti-collision mechanism is connected with a controller of the medium-frequency induction heater. On the basis that the limiting hole of the anti-collision mechanism is basically concentric with the central hole of the medium-frequency induction heater, the aperture of the limiting hole is ensured to be smaller than or equal to that of the medium-frequency induction heater and larger than that of a pipe material. When the pipe material does not have the crooked or crooked less circumstances, material feeding unit can carry the pipe material to the intermediate frequency induction heater through this anticollision institution's spacing hole smoothly and carry out the thickening operation. When the pipe material is seriously bent and the end face of the pipe material is obviously warped, the front end face of the pipe material firstly meets the end face of the limiting hole of the anti-collision mechanism in the pipe material conveying process of the feeding device, so that the support is pushed to rotate forwards along the axis of the horizontal rotating shaft, meanwhile, the first swing rod rotates backwards along the axis of the horizontal rotating shaft, the lower end of the first swing rod touches the contact switch, the controller of the medium-frequency induction heater can control the feeding device to stop feeding, and the impact between the pipe material and the medium-frequency induction heater is prevented. And then the bent pipe material is lifted away by a travelling crane, so that normal production can be recovered. For the lifted bent pipe, the straightening operation is firstly carried out, and then the thickening operation can be carried out again.

Therefore, the anti-collision mechanism for the medium-frequency induction heater of the thickening production line can effectively prevent the seriously bent pipe materials from approaching the medium-frequency induction heater, and thoroughly avoid the collision between the pipe materials and the induction heater. Simultaneously, adopt this anticollision institution, need not to increase intermediate frequency induction heater's aperture, can not increase energy resource consumption, and its simple structure need not personnel's control, hardly increases the thickening cost.

Drawings

FIG. 1 is a schematic structural diagram of an anti-collision mechanism for a medium-frequency induction heater in a thickening production line;

FIG. 2 is a left side view of FIG. 1;

FIG. 3 is a sectional view taken along line A-A of FIG. 1;

FIG. 4 is a schematic view of the anti-collision mechanism for the medium frequency induction heater in the thickening production line in a use state (normal pipe material);

fig. 5 is a schematic view of a second usage state of the anti-collision mechanism for the medium frequency induction heater in the thickening production line (the tube material is seriously warped).

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1, fig. 2 and fig. 3, the anti-collision mechanism for the medium frequency induction heater in the thickening production line of the invention comprises a base 1, wherein pillars 4 arranged side by side are fixed on the base 1, a horizontal rotating shaft 6 is connected between the top ends of the pillars 4, and the horizontal rotating shaft 6 and the pillars 4 are in running fit.

And a support is fixed above the horizontal rotating shaft 6, and a horizontally arranged limiting hole 8 is formed in the support. The support is a square frame 7, a screw hole is formed in the middle of each edge of the square frame 7, a screw rod 9 is arranged in each screw hole, two ends of each screw rod 9 extend out of the screw holes, and a locking nut 10 is arranged on each screw rod. The axes of the screw rods 9 pass through the center point of the square frame 7, and the circle where the connecting lines of the inner ends of the screw rods 9 are located forms the limiting hole 8.

A first swing rod 3 is fixed below the horizontal rotating shaft 6, and a contact switch 2 is arranged on the base 1 corresponding to the lower end of the first swing rod 3.

A second swing rod 5 is further fixed below the horizontal rotating shaft 6, a spring support 11 is arranged on the base 1 corresponding to the lower end of the second swing rod 5, and a return spring 12 is connected between the spring support 11 and the lower end of the second swing rod 5.

Before use, the anti-collision mechanism for the medium frequency induction heater of the thickening production line is arranged at the front end of an inlet of the medium frequency induction heater 13, and the contact switch 2 of the anti-collision mechanism is connected with the controller 16 of the medium frequency induction heater 13. On the basis that the limiting hole 8 of the anti-collision mechanism is basically concentric with the central hole of the medium-frequency induction heater 13, the aperture of the limiting hole 8 is ensured to be smaller than or equal to the aperture of the medium-frequency induction heater 13 and larger than the aperture of the pipe material 14. After the connection adjustment is finished, the device can be normally used. The support adopts a structure of a square frame 7, and the circle where the inner ends of the four screw rods 9 are connected forms the limiting hole 8, so that the size of the aperture of the limiting hole 8 can be conveniently adjusted, and thickening operation can be conveniently carried out by matching pipe materials 14 with various pipe diameters.

During thickening operation, the medium frequency induction heater 13 is started, and the feeding device 15 starts to convey the pipe material 14 to the central hole of the medium frequency induction heater 13. As shown in fig. 4, when the pipe 14 is not bent or is bent slightly, the feeding device 15 can smoothly convey the pipe 14 to the if induction heater 13 through the limiting hole 8 of the anti-collision mechanism for thickening. As shown in fig. 5, when the pipe 14 'is bent seriously and the end surface of the pipe has obvious warpage, the front end surface of the pipe 14' first meets the end surface (the inner end of the screw 9) of the limiting hole 8 of the anti-collision mechanism in the process of conveying the pipe 14 'by the feeding device 15, so as to push the square frame 7 to rotate forward along the axis of the horizontal rotating shaft 6, and meanwhile, the first swing link 3 and the second swing link 5 rotate backward along the axis of the horizontal rotating shaft 6, the lower end of the first swing link 3 touches the contact switch 2, and the controller 16 of the intermediate frequency induction heater 13 can control the feeding device 15 to stop feeding, so as to prevent the pipe 14' from colliding with the intermediate frequency induction heater 13. At this time, the bent pipe 14' can be lifted off by using a travelling crane, the second swing rod 5 drives the horizontal rotating shaft 6 to rotate under the action of the tension of the reset spring 12 on the spring support 11, so that the square frame 7 and the limiting hole 8 (the screw 9) are reset, the first swing rod 3 is separated from the contact switch 2, the controller 16 of the medium-frequency induction heater 13 can control the feeding device 15 to recover to operate, and the subsequent pipe thickening operation is continued. For the lifted-off bent pipe 14', the pipe needs to be straightened first and then thickened again.

The anti-collision mechanism for the medium-frequency induction heater of the thickening production line can judge whether the bending warpage of the pipe material exceeds the aperture of the central hole of the medium-frequency induction heater through the limiting hole before the pipe material to be thickened enters the medium-frequency induction heater, effectively prevents the pipe material which is seriously bent from approaching the medium-frequency induction heater, and thoroughly avoids the collision between the pipe material and the induction heater. Simultaneously, adopt this anticollision institution, need not to increase intermediate frequency induction heater's aperture, can not increase energy resource consumption, and its simple structure need not personnel's control, hardly increases the thickening cost.