CN206550487U - For welding pool and the integral type protective cover of fillet in normal shear high-temperature region - Google Patents

Abstract

The utility model discloses an integrated protective cover for welding molten pool and high-temperature zone of the front weld seam, which comprises a casing with a first exhaust hole at the bottom and a ventilation pipe arranged in the casing, the ventilation pipe It includes an air inlet main pipe with two gas outlets, a first ventilation pipe used to protect the weld pool and a second ventilation pipe used to protect the high temperature zone of the front weld seam respectively connected to the two gas outlets; A ventilation pipe is annular; the second ventilation pipe includes a first branch pipe and a second branch pipe; the shape of the first branch pipe matches the shape of the first ventilation pipe; the first ventilation pipe, the first branch pipe and the second branch pipe In the two branch pipes, at least the first vent pipe and the second branch pipe contain a second exhaust hole; the shell includes a first housing for accommodating the second branch pipe, a second housing for accommodating the first vent pipe and the first branch pipe, and a housing for accommodating the first vent pipe and the first branch pipe. The third shell of the intake main pipe; the upper and bottom of the second shell are provided with through holes matching the first air pipe and the first branch pipe.

Description

Integral protective cover for weld pool and front weld high temperature zone

technical field

The utility model relates to the technical field of welding, in particular to a protective cover for welding.

Background technique

Titanium alloy welding is very important in military use. During welding, it is necessary to protect the welding pool, the high temperature zone of the front weld and the high temperature zone of the back weld at the same time to avoid reactions with hydrogen, oxygen, nitrogen, carbon, etc., thereby reducing And avoid welding defects such as cracks and pores at the weld, so that the plasticity and toughness of the titanium alloy are significantly improved. Among them, the weld pool refers to the weld area directly under the welding torch, the front weld high temperature area refers to the weld front area where the temperature of the adjacent weld pool is above 300 °C after the welding torch moves, and the back weld high temperature area refers to the weld area adjacent to the front weld. The relative temperature of the high temperature zone of the weld is the backside area of the weld above 300°C. At present, three inert gas protection devices are usually used to protect the welding pool, the high-temperature zone of the front weld and the high-temperature zone of the back weld respectively, so three protective air inlets and three gas supply lines are required. Three shielding devices are required to operate simultaneously, thus three shielding gas cylinders are also required for independent gas supply. In actual industrial production, this protection method is more complicated, and it brings three specific problems:

(1) Each worker needs to control and operate the three protective devices at the same time, which will greatly increase the difficulty of welding production; Due to the gap between them, the high-temperature area in the middle is not protected, which seriously affects the welding quality; (3) Since multiple welding machines are usually required to work at the same time, whenever the shielding gas is used up, it is necessary to replace three times the number of gas cylinders as the number of welding machines , but in the actual welding production, due to the dense stacking of materials in the factory, the process of replacing gas cylinders is very inconvenient; (4) Each welding machine needs three gas supply hoses, and the increase in the number of hoses will make the staff The probability of being tripped is greatly increased, which brings a greater safety hazard.

Utility model content

Based on the deficiencies of the above-mentioned prior art, the technical problem to be solved by the utility model is to provide a protective cover for welding that can effectively reduce the number of shielding gas cylinders, provide more comprehensive protection and better operational safety.

The technical solution adopted by the utility model to solve the above-mentioned technical problems is that the integrated protective cover used for the high-temperature zone of the welding pool and the front weld seam includes a shell with a first vent hole at the bottom and a A ventilation pipe, the ventilation pipe includes an air inlet main pipe with two gas outlets, a first ventilation pipe used to protect the weld pool and a first ventilation pipe used to protect the high-temperature zone of the front weld seam, respectively connected to the two gas outlets. Two ventilation pipes; the first ventilation pipe is annular; the second ventilation pipe includes a first branch pipe and a second branch pipe; the shape of the first branch pipe matches the shape of the first ventilation pipe; the first ventilation pipe In the trachea, the first branch pipe and the second branch pipe, at least the first vent pipe and the second branch pipe contain a second exhaust hole; the shell includes a first housing that is sequentially connected to accommodate the second branch pipe, accommodate the first vent pipe and the second branch pipe. The second casing of the first branch pipe, the third casing containing the intake main pipe; the upper part and the bottom of the second casing are provided with through holes matching the first ventilation pipe and the first branch pipe.

First of all, the first ventilation pipe for protecting the welding pool and the second ventilation pipe for protecting the high-temperature zone of the front weld share the same air inlet, which can reduce the number of gas supply hoses and shielding gas cylinders, and improve the safety of welding operations . Secondly, through ingenious design, the second vent pipe is designed to include the second branch pipe and the first branch pipe matched with the first vent pipe, and the annular through hole formed by the first branch pipe and the first vent pipe can be used as the installation channel of the welding torch , on the one hand, the integration level can be improved without affecting the installation of the welding torch, and the length of the air pipe can be shortened; on the other hand, the distance between the first air pipe and the second branch pipe can be shortened, and the unprotected area between the welding pool and the high temperature zone of the front weld seam can be reduced. The area of the area can effectively improve the quality of welding products. The shell can be integrally formed, or can be assembled from a first shell, a second shell, and a third shell that are manufactured separately. Preferably, the first ventilation pipe is located below the first branch pipe. At this time, the distance between the first ventilation pipe and the first exhaust hole at the bottom of the second shell is shorter, and the protective gas flow rate is faster, so as to avoid the influence of the first branch pipe on the The flow rate and flow rate of the shielding gas that protects the weld pool.

As a further improvement of the above-mentioned one-piece protective cover for the welding puddle and the high-temperature zone of the front weld seam, a first airflow acceleration device is provided between the second branch pipe and the bottom of the first shell; the first A second airflow acceleration device is provided between the vent pipe and the bottom of the second housing. By setting the protective gas flow acceleration device, the outflow speed of the protective gas can be significantly increased, and the protective effect can be maintained while reducing the amount of protective gas used.

As a further improvement of the above-mentioned one-piece protective cover for the high-temperature zone of the welding puddle and the front weld seam, the first airflow acceleration device is an airflow plate with a third exhaust hole; by setting the airflow plate, the The protective gas flowing out from the bottom of the first shell is more evenly distributed, and the protective effect is better.

As a further improvement of the above-mentioned one-piece protective cover for the high-temperature zone of the weld pool and the front weld seam, the upper opening area of the third exhaust hole is larger than the lower opening area; by increasing the turbulence effect of the shielding gas, it can be used Significantly increase the outflow speed of the protective gas, the device is simple and the protective effect is significantly improved.

As a further improvement of the above-mentioned one-piece protective cover for the weld puddle and the high-temperature zone of the front weld seam, the second airflow acceleration device is an inclined side connecting the bottom of the second shell and the bottom of the third shell. Since the second housing is provided with a through hole for the installation of the welding torch, the inclined side can increase the flow rate of the shielding gas without affecting the installation of the welding torch. The structure is simple and the installation is convenient.

As a further improvement of the above-mentioned one-piece protective cover for the weld pool and the high-temperature zone of the front weld seam, a baffle is provided between the first shell and the second shell. By setting the baffle, it can be ensured that both the molten pool and the high-temperature zone of the front welding seam are independently protected, and it is more convenient to control the flow rate of the shielding gas in the first ventilation pipe and the second ventilation pipe.

As a further improvement of the above-mentioned one-piece protective cover for welding molten pool and front weld high temperature zone, it also includes a shielding gas flow control system; the shielding gas flow control system includes a single-chip microcomputer, and the input end of the single-chip microcomputer is connected with The upper computer, the interruption controller connected with the welding torch, the transmitter connected with the flow sensor, the output end of the single-chip microcomputer is connected with the conversion circuit and the diverter valve in turn; the diverter valve is arranged on the intake main pipe. When the welding torch is working, the interrupt controller ends the interrupt control of the welding torch, and the host computer transmits the required shielding gas flow target value to the single-chip microcomputer, and the single-chip microcomputer converts the digital signal into an analog signal that can be recognized by the diverter valve through the conversion circuit to control the diverter valve When it is opened, the protection gas flows into the first vent pipe and the second vent pipe. When it passes through the flow sensor, the flow rate is monitored, and the flow sensor sends a flow feedback value signal, which is transmitted to the single-chip microcomputer through the transmitter, and the single-chip microcomputer sends this The flow feedback value is compared with the flow target value transmitted by the host computer. When the feedback value is greater than the target value, the control diverter valve is closed, otherwise, the diverter valve is opened until the target value is equal to the feedback value. At this time, the protective gas flow is stable. Near the target flow rate set by the host computer. By setting the shielding gas flow control system, it can be ensured that the shielding gas flows respectively flowing out from the bottom of the first shell and the bottom of the second shell meet the requirements in the shortest time.

As a further improvement of the above-mentioned one-piece protective cover for the high-temperature zone of the weld pool and the front weld seam, the diverter valve is a proportional diverter valve. By setting the proportional diverter valve, it is more convenient to control the first vent pipe and the second vent pipe. The gas flow of the air pipe is used to protect the particularity of the molten pool and the high-temperature zone of the front weld respectively; due to the setting of the proportional diverter valve, it is possible to set the flow sensor only on the main intake pipe, of course, it can also be further installed on the first air pipe Flow sensors are set on the second ventilation pipe, and the single-chip microcomputer comprehensively considers the test results of multiple flow sensors to make the control accuracy higher; the model of the terminal controller is 8259A; the conversion circuit is a D/A conversion circuit ; The transmitter is a digital transmitter; an amplifying circuit capable of amplifying digital signal power is also provided between the conversion circuit and the shunt valve.

As a further improvement of the above-mentioned one-piece protective cover for the high-temperature zone of the weld pool and the front weld seam, the second vent hole of the first ventilation pipe is arranged on the lower half of the first ventilation pipe wall; The second exhaust hole of the second branch pipe is arranged on the wall of the lower half of the second branch pipe. Different from the 360° full axial opening of the ventilation pipe of other protective covers, the ventilation pipe of the utility model only has holes below the cross section level, which can increase the gas pressure in the pipe when the same gas flow is input, so that the gas has a relatively The large flow rate makes the ejected gas better concentrated in the direction of the weld to be protected, improves the protection efficiency, saves the protection gas, is environmentally friendly and economical, and adapts to the development of the times.

As a further improvement of the above-mentioned one-piece protective cover for the high-temperature zone of the weld pool and the front weld seam, the shape of the second branch pipe is U-shaped. Compared with the traditional strip-shaped ventilation pipe, the U-shaped second The covering area of the branch pipe is wider and the protection area is larger; the first branch pipe is circular or semi-circular.

The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments. Additional aspects and advantages of the present invention will be set forth in part in the description which follows, and part will be apparent from the description which follows, or can be learned by practice of the present invention.

Description of drawings

The accompanying drawings constituting a part of this application are used to provide a further understanding of the utility model, and the specific implementation modes, schematic examples and descriptions of the utility model are used to explain the utility model and do not constitute improper limitations to the utility model. In the attached picture:

FIG. 1 is a top view of a first ventilation pipe of Embodiment 1. FIG.

FIG. 2 is a bottom view of the first ventilation pipe of Embodiment 1. FIG.

FIG. 3 is a top view of the second ventilation pipe of Embodiment 1. FIG.

FIG. 4 is a bottom view of the second vent pipe of Embodiment 1. FIG.

Fig. 5 is a cross-sectional view of the integrated protective cover for the weld puddle and the high-temperature zone of the front weld seam in embodiment 1.

FIG. 6 is a schematic structural diagram of the shielding gas flow control system in Embodiment 1. FIG.

FIG. 7 is a bottom view of the second air pipe of Embodiment 2. FIG.

FIG. 8 is a bottom view of the second vent pipe of Embodiment 3. FIG.

detailed description

It should be noted that, in the case of no conflict, the specific implementation methods, examples and features in the present application can be combined with each other. The utility model will now be described in detail with reference to the accompanying drawings and in conjunction with the following contents.

In order to enable those skilled in the art to better understand the scheme of the utility model, the technical solutions in the specific implementation manner and examples of the utility model will be clearly and completely described below in conjunction with the accompanying drawings in the specific implementation manner and examples of the utility model Description, obviously, the described embodiment is only a partial embodiment of the present utility model, rather than all the embodiments. Based on the specific implementation modes and examples in the present utility model, all other implementation modes and examples obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of the utility model.

Example 1

As shown in Figures 1-6, the integrated protective cover for the welding puddle and the high-temperature zone of the front weld includes a shell with a first exhaust hole 31 at the bottom and a vent pipe arranged in the shell; The ventilation pipe includes an air inlet main pipe 100 with two gas outlets, a first ventilation pipe 1 connected to the two gas outlets for protecting the welding puddle and a second ventilation pipe for protecting the high temperature zone of the front weld 2. The first ventilation pipe 1 is circular; the second ventilation pipe 2 includes a first branch pipe 21 and a second branch pipe 22. The shape of the first branch pipe 21 matches the shape of the first ventilation pipe 1 And it is circular, the shape of the second branch pipe 22 is U-shaped; Vent 32. The shell includes a first housing 41 for accommodating the second branch pipe 22, a second housing 42 for accommodating the first ventilation pipe 1 and the first branch pipe 21, and a third housing 43 for accommodating the intake main pipe 100, which are sequentially connected; The upper and lower parts of the second housing 42 are provided with through holes 420 matching the first ventilation pipe 1 and the first branch pipe 21 . The shape of the first housing 41 is a rectangle. A baffle 6 is provided between the first housing 21 and the second housing 22 .

A first airflow accelerating device is provided between the second branch pipe 22 and the bottom of the first housing 41; the first airflow accelerating device is an airflow plate 5 with a third exhaust hole 33; the third exhaust The upper opening area of the hole 33 is larger than the lower opening area. A second airflow acceleration device is provided between the first ventilation pipe 1 and the bottom of the second housing 42; Side 421.

It also includes a shielding gas flow control system, the shielding gas flow control system includes a single-chip microcomputer, the input of the single-chip microcomputer is connected with a host computer, an interrupt controller connected with a welding torch, and a transmitter connected with a flow sensor, and the single-chip microcomputer The output end is sequentially connected with a conversion circuit, an amplifying circuit, and a diverter valve 7; the diverter valve 7 is arranged on the main intake pipe 100, and the diverter valve 7 is a proportional diverter valve; the flow sensor is arranged on the main pipe 100 of the intake air; The model of the terminal controller is 8259A; the conversion circuit is a D/A conversion circuit; the transmitter is a digital transmitter.

Example 2

Compared with Embodiment 1, the integrated protective cover for the weld pool and the high-temperature zone of the front weld of this embodiment has the following differences: As shown in Figure 7, the lower half of the first branch pipe 21 has a A second exhaust hole 32 is also provided.

Example 3

Compared with Embodiment 1, the integrated protective cover for the weld puddle and the high-temperature zone of the front weld of this embodiment has the following differences: As shown in FIG. 8 , the first branch pipe 21 is semicircular.

Claims (10)

1. An integrated protective cover for the welding pool and the high-temperature zone of the front weld seam, comprising a shell with a first vent hole (31) at the bottom and a ventilation pipe arranged in the shell, characterized in that: The ventilation pipe includes an air inlet main pipe (100) with two gas outlets, a first ventilation pipe (1) connected to the two gas outlets for protecting the welding pool and a high temperature welding seam for protecting the front side. zone's second vent pipe (2); The first vent pipe (1) is annular; the second vent pipe (2) includes a first branch pipe (21) and a second branch pipe (22), and the shape of the first branch pipe (21) is the same as that of the first vent pipe. The shape of the trachea (1) matches each other; in the first ventilation tube (1), the first branch tube (21) and the second branch tube (22), at least the first ventilation tube (1) and the second branch tube (22) contain The second exhaust hole (32); The shell includes a first housing (41) connected in sequence to accommodate the second branch pipe (22), a second housing (42) to accommodate the first ventilation pipe (1) and the first branch pipe (21), and a second housing (42) to accommodate the intake air The third housing (43) of the main pipe (100); the top and bottom of the second housing (42) are provided with through holes (420) matched with the first ventilation pipe (1) and the first branch pipe (21) . 2. The integrated protective cover for welding puddle and front weld seam high temperature zone according to claim 1, characterized in that: between the second branch pipe (22) and the bottom of the first shell (41) A first airflow acceleration device is provided; a second airflow acceleration device is provided between the first ventilation pipe (1) and the bottom of the second casing (42). 3. The integrated protective cover for welding puddle and front weld seam high temperature zone as claimed in claim 2, characterized in that: the first airflow acceleration device is an airflow plate with a third exhaust hole (33) (5). 4. The integrated protective cover for welding puddle and front weld seam high temperature zone according to claim 3, characterized in that: the upper opening area of the third exhaust hole (33) is larger than the lower opening area. 5. The integrated protective cover for welding puddle and front weld seam high temperature zone as claimed in claim 2, characterized in that: the second airflow accelerating device is for connecting the bottom of the second casing (42) and the third The inclined side (421) of housing (43) bottom. 6. The integrated protective cover for welding puddle and front weld seam high temperature zone according to claim 1, characterized in that: the first casing (41) and the second casing (42) are provided with There is a baffle (6). 7. The integrated protective cover for welding puddle and front weld seam high temperature zone as claimed in claim 1, characterized in that: it also includes a shielding gas flow control system; the shielding gas flow control system includes a single-chip microcomputer, the The input end of the single-chip microcomputer is connected with a host computer, an interrupt controller connected with a welding torch, and a transmitter connected with a flow sensor, and the output end of the single-chip microcomputer is connected with a conversion circuit and a diverter valve (7) in sequence; the diverter valve (7 ) is located on the intake main pipe (100). 8. The integrated protective cover for welding puddle and front weld seam high temperature zone as claimed in claim 7, characterized in that: the diverter valve (7) is a proportional diverter valve; the flow sensor is arranged at the inlet On the main pipe (100); an amplification circuit is also provided between the conversion circuit and the shunt valve (7). 9. The integrated protective cover for welding puddle and front weld seam high temperature zone as claimed in claim 1, characterized in that: the second exhaust hole (32) of the first ventilation pipe (1) is located at On the wall of the lower half of the first ventilation pipe (1); the second exhaust hole (32) of the second branch pipe (22) is arranged on the wall of the lower half of the second branch pipe (22). 10. The integrated protective cover for welding puddle and front weld seam high temperature zone as claimed in claim 1, characterized in that: the shape of the second branch pipe (22) is U-shaped; the first branch pipe ( 21) be annular or semi-annular.