CN212398439U - Intelligent anti-deformation device for welding stainless steel low-temperature storage tank - Google Patents

Abstract

The utility model relates to an intelligent anti-deformation device for welding a stainless steel low-temperature storage tank, which comprises a protective cover, a water spraying device, a temperature sensor, a water tank and a controller; the protective cover is a box body structure with an opening on one side surface, an upper connecting pipe is arranged on the upper end surface of the protective cover, and a lower connecting pipe is arranged on the lower end surface of the protective cover; the water spraying device is arranged in the protective cover and communicated with the upper connecting pipe, and a water spraying hole of the water spraying device faces to the side face of the opening of the protective cover; the temperature sensor is arranged in the protective cover and used for measuring the temperature near the welding seam; the water tank is arranged outside the protective cover, a submersible pump is arranged in the water tank, the upper connecting pipe is connected with the water tank through a water inlet pipe, the water inlet pipe is connected with the submersible pump, and the lower connecting pipe is connected with the water tank through a water outlet pipe; the temperature sensor, the upper stop valve, the lower stop valve and the submersible pump are respectively connected with the controller, and the controller receives a measuring signal of the temperature sensor and controls the upper stop valve, the lower stop valve and the submersible pump to be opened and closed. The utility model discloses have and aerify and two kinds of functions of shape are prevented to automatic water spray to the stainless steel welding seam back.

Description

Intelligent anti-deformation device for welding stainless steel low-temperature storage tank

Technical Field

The utility model relates to a stainless steel low temperature storage tank welding technical field, concretely relates to stainless steel low temperature storage tank welding intelligence anti-deformation device.

Background

The liquefied gas storage tank is a low-temperature storage tank mainly used for storing Liquefied Natural Gas (LNG), Liquefied Ethylene (LEG), liquefied propylene and other media, and an inner shell and an outer shell of the storage tank body are mainly made of 196 ℃ below zero-resistant low-temperature steel such as austenitic stainless steel. The low-temperature tank has the characteristics of large storage tank volume, thin shell plate of the tank body and the like. The stainless steel has the characteristics of large expansion coefficient, low heat conductivity coefficient and the like, so that the welding deformation of the stainless steel, particularly thin stainless steel, is easy to generate during welding.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in producing welding deformation's not enough easily during the welding to the sheet metal stainless steel that above-mentioned prior art exists, provides a stainless steel low temperature storage tank welding intelligence anti-deformation device, can realize aerifing and automatic water spray to the stainless steel welding seam back, reduces stainless steel welding deformation.

The utility model discloses a solve the technical scheme that technical problem that the aforesaid provided adopted and be:

an intelligent anti-deformation device for welding of a stainless steel low-temperature storage tank comprises a protective cover, a water spraying device, a temperature sensor, a water tank and a controller; the protective cover is of a box body structure with an opening on one side face, an upper connecting pipe is arranged on the upper end face of the protective cover, an upper stop valve is arranged on the upper connecting pipe, a lower connecting pipe is arranged on the lower end face of the protective cover, and a lower stop valve is arranged on the lower connecting pipe; the water spraying device is arranged in the protective cover and communicated with the upper connecting pipe, and a water spraying hole of the water spraying device faces to the side face of the opening of the protective cover; the temperature sensor is arranged in the protective cover and used for measuring the temperature near the welding seam; the water tank is arranged outside the protective cover, a submersible pump is arranged in the water tank, the upper connecting pipe is connected with the water tank through a water inlet pipe, the water inlet pipe is connected with the submersible pump, and the lower connecting pipe is connected with the water tank through a water outlet pipe; the temperature sensor, the upper stop valve, the lower stop valve and the submersible pump are respectively connected with the controller, and the controller receives a measuring signal of the temperature sensor and controls the opening and closing of the upper stop valve, the lower stop valve and the submersible pump.

In the scheme, the water spraying device is composed of a steel pipe, and a plurality of water spraying holes are formed in the steel pipe.

In the above scheme, the temperature sensor follows the left and right sides board of safety cover sets up a plurality of, and the sensor of the left and right sides is along direction of height staggered arrangement.

In the scheme, the temperature sensor is tightly attached to one side of the opening of the protective cover so as to be convenient for the integral installation of the protective cover, and the temperature sensor is tightly attached to the base materials on two sides of the welding line.

The beneficial effects of the utility model reside in that:

1. the utility model discloses the device has and aerifys and two kinds of functions of automatic water spray anti-deformation to the stainless steel welding seam back. During the first backing welding, the device plays a role of an air-filling cover, the back of the device is filled with argon for protection, the back is prevented from being oxidized during welding, the single-side welding and double-side forming is realized, the traditional gouging mode is avoided, the heat input is reduced, and the welding deformation is prevented; when filling welding, through starting the device, when temperature sensor gathered the temperature signal when welding, immediately started water spray system, sprayed water and carried out forced cooling to the welding seam back, reduced stainless steel welding deformation.

2. The utility model discloses the device monitors the temperature at the welding seam back through temperature sensor to control opening and close of immersible pump, realize automatic control water spray cooling, when effectively preventing welding deformation, reduced the cost of labor, not only can be used to stainless steel welding vertical weld, also can be used to horizontal welding position.

Drawings

The invention will be further explained with reference to the drawings and examples, wherein:

FIG. 1 is an overall structure diagram of the intelligent anti-deformation device for welding the stainless steel low-temperature storage tank of the utility model;

FIG. 2 is a structure diagram of a protective cover of the intelligent anti-deformation device for welding the stainless steel low-temperature storage tank shown in FIG. 1;

FIG. 3 is a schematic view of a bottoming weld performed using the present invention;

fig. 4 is a schematic view of filling welding using the present invention.

In the figure: 10. a protective cover; 11. an upper connecting pipe; 12. an upper stop valve; 13. a lower connecting pipe; 14. a lower stop valve; 20. a water spraying device; 30. a temperature sensor; 40. a water tank; 41. a water inlet pipe; 42. a water outlet pipe; 43. a submersible pump; 200. and (7) welding seams.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1-2, the intelligent anti-deformation device for welding a stainless steel cryogenic storage tank according to a preferred embodiment of the present invention includes a protective cover 10, a water spraying device 20, a temperature sensor 30, a water tank 40 and a controller (not shown). The protective cover 10 is a box structure with an opening on one side and is made of channel steel or steel plates. An upper connecting pipe 11 is arranged on the upper end face of the protective cover 10, an upper stop valve 12 is installed on the upper connecting pipe 11, a lower connecting pipe 13 is arranged on the lower end face of the protective cover 10, and a lower stop valve 14 is installed on the lower connecting pipe 13. The water spraying device 20 is composed of a steel pipe, a plurality of water spraying holes are formed in the steel pipe, one side provided with the water spraying holes faces to one side of the opening of the protection cover 10, and the water spraying device 20 is arranged inside the protection cover 10 and is communicated with the upper connecting pipe 11. The temperature sensor 30 is arranged in the protective cover 10 and used for measuring the temperature near the welding seam 200, and the specific installation form is as follows: a plurality of temperature sensors 30 are installed along the left side plate and the right side plate of the protection cover 10, the sensors on the left side and the right side are arranged in a staggered mode along the height direction, and each temperature sensor 30 is installed in a mode of being attached to one side of the opening of the protection cover 10, so that the temperature sensors 30 are attached to base materials on two sides of a welding line when the protection cover 10 is integrally installed. The water tank 40 is arranged outside the protective cover 10, tap water is contained in the water tank 40 during operation, the submersible pump 43 is arranged in the water tank 40, the upper connecting pipe 11 is connected with the water tank 40 through the water inlet pipe 41, the water inlet pipe 41 is connected with the submersible pump 43, and the lower connecting pipe 13 is connected with the water tank 40 through the water outlet pipe 42. The temperature sensor 30, the upper stop valve 12, the lower stop valve 14 and the submersible pump 43 are respectively connected with a controller, and the controller receives a measuring signal of the temperature sensor 30 and controls the opening and closing of the upper stop valve 12, the lower stop valve 14 and the submersible pump 43.

As shown in figure 3, the protective cover 10 can be used independently, is arranged on the back of a stainless steel butt-joint welding seam, is filled with argon gas, and plays a role in protecting the back of the welding seam when the first bottoming is carried out during stainless steel welding so as to prevent the metal of the welding seam from being oxidized.

As shown in FIG. 4, when the stainless steel welding seam of the cryogenic tank is filled and welded, the protective cover 10 arranged on the back of the welding seam is connected with the water inlet pipe and the water outlet pipe 42, at the moment, the stop valve is in an open state, the external power supply is connected, and the temperature sensor 30 and the submersible pump 43 are in a standby working state. When a welder performs filling welding, the temperature of a welding seam part rises rapidly, heat is transferred to the back through a steel plate at the welding seam part, when the temperature exceeds a set temperature value, the temperature sensor 30 at the back triggers and starts the submersible pump 43 to start working, water in the water tank 40 is sent into the protective cover 10 through the water inlet pipe 41, the water is sprayed from the water spraying device 20 to the back of the stainless steel welding seam, the sprayed water flows into the lower part from the upper part of the welding seam in the protective cover 10 by virtue of the gravity of the water flow, and flows back to the water tank 40 from the water outlet pipe 42, and. The deformation of the welding seam caused by heat input is reduced by cooling of the water flow.

The method for welding the stainless steel low-temperature storage tank by using the intelligent anti-deformation device specifically comprises the following steps:

s1, mounting the protective cover 10: the protection cover 10 is fixed on the back of the stainless steel welding line 200 by spot welding, the side surface of the opening of the protection cover 10 faces the base materials on the two sides of the welding line, so that the temperature sensor 30 is attached to the base materials on the two sides of the welding line, and the gap between the protection cover 10 and the base materials is filled with sealant to realize sealing.

S2, backing welding: the upper stop valve 12 and the lower stop valve 14 are controlled to be opened through the controller, argon is filled into the protective cover 10 through the upper connecting pipe 11, the upper stop valve 12 and the lower stop valve 14 are closed after the argon is filled, and argon arc welding backing welding of a first welding seam can be carried out.

S3, filling and welding: after the first backing weld is finished, the gaps around the protective cover 10 are checked again to ensure that the periphery of the protective cover 10 is sealed and watertight, then the water inlet pipe 41 and the water outlet pipe 42 are installed, the water inlet pipe 41 is connected with the submersible pump 43, the upper stop valve 12 and the lower stop valve 14 are opened through the controller, the external power supply is connected to enable the temperature sensor 30 and the submersible pump 43 to be in a working state, and then filling welding is carried out. During filling welding, due to welding heat input, the temperature around the welding seam rises greatly, when the temperature sensor 30 on the back monitors that the temperature of the welding seam rises to a set value of 150 ℃, the controller controls the submersible pump 43 to start working, cold water enters the protective cover 10 through the water inlet pipe 41, the heated welding seam back is sprayed with water through the water spraying device 20, and water flows back to the water tank 40 through the water return pipe to realize recycling.

When the stainless steel longitudinal seam is welded vertically, the welding direction is from bottom to top, and the water flow is from top to bottom, so that a good cooling effect is achieved, and the water flowing downwards flows back to the water tank 40 from the water return pipe. When the system works, circulating water is controlled in the closed system, and the influence of water on surrounding construction sites is effectively avoided. The utility model discloses not only can be used to stainless steel welding vertical weld, also can be used to horizontal welding seam position, the application method is the same.

And S4, when the filling welding operation is stopped, the welding seam temperature is rapidly reduced under the action of water cooling, and when the temperature sensor 30 detects that the welding seam temperature is reduced to 150 ℃ lower than a set value, the controller controls the submersible pump 43 to stop working. The utility model discloses realize the intelligent water spray control cooling of welding process.

It should be noted that, if do not adopt argon arc welding backing, can adopt equally the utility model discloses the device when stainless steel vertical welding seam welding, adopts traditional shielded metal arc welding or other welding methods back cover back welding first way, at this welding seam back side installation the utility model discloses the device begins to implement from step S3, also can realize welding process' S intelligent water spray control cooling and reduce welding deformation, and safety cover 10 only plays the water spray cooling effect this moment.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

While the embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many modifications may be made by one skilled in the art without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims (4)

1. An intelligent anti-deformation device for welding of a stainless steel low-temperature storage tank is characterized by comprising a protective cover, a water spraying device, a temperature sensor, a water tank and a controller; the protective cover is of a box body structure with an opening on one side face, an upper connecting pipe is arranged on the upper end face of the protective cover, an upper stop valve is arranged on the upper connecting pipe, a lower connecting pipe is arranged on the lower end face of the protective cover, and a lower stop valve is arranged on the lower connecting pipe; the water spraying device is arranged in the protective cover and communicated with the upper connecting pipe, and a water spraying hole of the water spraying device faces to the side face of the opening of the protective cover; the temperature sensor is arranged in the protective cover and used for measuring the temperature near the welding seam; the water tank is arranged outside the protective cover, a submersible pump is arranged in the water tank, the upper connecting pipe is connected with the water tank through a water inlet pipe, the water inlet pipe is connected with the submersible pump, and the lower connecting pipe is connected with the water tank through a water outlet pipe; the temperature sensor, the upper stop valve, the lower stop valve and the submersible pump are respectively connected with the controller, and the controller receives a measuring signal of the temperature sensor and controls the opening and closing of the upper stop valve, the lower stop valve and the submersible pump.

2. The intelligent anti-deformation device for welding of the stainless steel low-temperature storage tank according to claim 1, wherein the water spraying device is composed of a steel pipe, and a plurality of water spraying holes are formed in the steel pipe.

3. The intelligent anti-deformation device for welding of the stainless steel low-temperature storage tank according to claim 1, wherein the temperature sensors are arranged along the left and right side plates of the protective cover, and the sensors on the left and right sides are arranged in a staggered manner in the height direction.

4. The intelligent welding deformation prevention device for the stainless steel cryogenic storage tank according to claim 1, wherein the temperature sensor is tightly attached to one side of the opening of the protection cover, so that the temperature sensor is tightly attached to base materials on two sides of a welding line when the protection cover is integrally installed.

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