RU2805377C1 - System for testing structure of tank container for strength using compression method - Google Patents

Abstract

FIELD: systems for testing strength.

SUBSTANCE: invention can be used to test the strength of a tank container structure. The complex contains a metal frame with four sides and a metal structure made of slats forming a closed contour in the form of a rectangular frame, the width and length of which are proportional to the width and length of the metal frame of the tank container. The metal structure contains a fixing device, and inside it, at least one platform is fixed on the bottom bar, located in the corner, contains at least one mechanism for pumping fuels and lubricants, creating a compression force, a pressure gauge and at least one device that transforms pneumohydraulic force into mechanical compression force, fixed on the site. The size of the gap made between the bottom side of the metal structure and the bottom side of the metal frame of the tank container should not be less than the distance measured from the horizontal surface of the platform to the top point of the device that transforms pneumohydraulic force into mechanical force, when it is in a vertical position on horizontal surface of the platform in non-working condition and should not be greater than the distance measured from the horizontal surface of the platform to the top point of the device that transforms pneumohydraulic force into mechanical force, when it is in a vertical position in working condition on the horizontal surface of the platform, and the size of the gap, made between each of the three remaining sides of the metal structure and each of the three remaining sides of the metal frame of the tank container shall not exceed 12 mm.

EFFECT: ability to conduct strength tests using the compression method on the structure of a tank container when it is in different positions.

6 cl, 5 dwg

Description

The invention relates to strength testing complexes and can be used to test the strength of a tank container structure, which includes a frame with two metal frames containing fittings, as well as a tank - a container designed for storing or transporting solid, liquid or gaseous products.

GOST 33549-2015 “TANK CONTAINERS WITH CONTAINERS MADE OF COMPOSITE MATERIALS” is known from the state of the art. This standard establishes requirements for mandatory strength testing of tank container frames. According to the requirements of GOST 33549-2015, models of tank containers must be tested for compression using the stacking method. The disadvantage of this method of testing tank container structures for strength using the compression method is the need for 8 similar tank containers or a stationary test bench.

A method of testing materials for dynamic compression is known from the prior art, which consists in the fact that a sample installed between the support and the piston of a hydraulic force exciter is loaded with a pulse load by connecting the force exciter to the cavity of the receiver, the initial pressure P _op of the working fluid and the volume V _p of which are set from the conditions

where F _max is the load on the sample at its maximum load-bearing capacity, kg;

C - rigidity of the hydraulic power exciter, kg/cm;

S _c - area of the piston of the hydraulic power exciter, cm ² ;

β - compressibility of the working fluid, cm ² /kg;

Δ - total absolute deformation of the sample, cm;

Δ ₃ - absolute limit deformation of the sample, cm,

characterized in that, in order to increase information content by ensuring registration of the complete stress-strain curve for a wide range of loads, before setting the initial pressure and volume of the receiver, the piston area S _{c of} the force exciter is determined from the conditions

_Ssmin , _Ssmax - respectively the minimum and maximum area of the piston of the power exciter available at the installation, cm ² ;

P _Ppmax - maximum permissible pressure in the hydraulic system receiver - power exciter, kg/cm ² ;

V _рmax - maximum volume of the receiver available in the installation, cm ³ ,

moreover, within the specified limits, S _c is chosen to be minimal when maximum loading speed is necessary and vice versa (patent SU 1177726, IPC G01N 3/30, IPC E21C 39/00, published 09/07/1985).

The disadvantages of the technical solution are:

- use of a permanently installed frame;

- the absence of a closed-loop metal structure that creates resistance to the compression force exerted by the structure of the test sample;

- the impossibility of placing the sample in different positions, namely, either vertically, or horizontally, or inclined to a horizontal surface;

- the impossibility of placing the frame in different positions: either vertically, or horizontally, or inclined to a horizontal surface;

- lack of possibility of testing the strength by compression method of the test objects - tank container.

Also known from the prior art is a loading unit for an installation for testing materials, with the help of which a method of testing asphalt concrete for fatigue strength under cyclic dynamic influences is implemented. The loading unit of the installation for testing materials contains a load transfer element, measuring means in the form of a force sensor and a displacement sensor, a horizontal base configured to move in a vertical plane, on which a sample beam is placed, while the load transfer element is made in the form of a U-shaped frame, the ends of the ends of which, at the maximum level of movement of the load transmission element, are placed with a gap relative to the plane of the horizontal base facing it, which is supported by compression springs, while compression springs are used as deformable elements of the displacement sensors (patent RU 132891, IPC G01N 3/00 , published September 27, 2013).

The disadvantages of the technical solution are:

- the absence of a closed-loop metal structure that creates resistance to the compression force exerted by the structure of the test sample beam;

- the impossibility of placing the horizontal base on which the sample beam is laid at an angle to the horizontal plane;

- the impossibility of placing the sample beam in various positions, namely, either vertically, or horizontally, or inclined to a horizontal surface;

- the device is stationary;

- lack of possibility of testing the strength by compression method of the test objects - tank container.

This technical solution was adopted as a prototype.

The technical problem of the invention is to meet the requirements for mandatory strength tests using the compression method for tank container structures, the structural elements of which are fittings, and the tank container structures can have different technical characteristics. Meeting the requirements for mandatory strength tests using the compression method is carried out with minimal labor costs.

The technical result of this invention lies in the possibility of testing the strength by compression method of the tank container structure (the elements of the metal frame of which are fittings) when it is in different positions, namely, either in a horizontal position, or in a vertical position, or in an inclined position to horizontal surface.

Also, the technical result consists in the use of a closed-loop metal structure that creates resistance to the compression force exerted by the metal frame of the tank container structure, with the possibility of the metal structure being in any position, namely, either in a horizontal position, or in a vertical position, or in an inclined position position to a horizontal surface.

In addition, the technical result is that the test is carried out not in one specific location of the equipment used, installed permanently, but in any location of the tank container.

The technical result is achieved in that the complex for testing the structural strength of a tank container by compression method, including a metal frame with four sides, contains a metal structure made of strips forming a closed contour in the form of a rectangular frame, the width and length of which are made proportional to the width and length metal frame of the tank container, the metal structure contains a locking device, and inside it, on the bottom bar, at least one platform is fixed, located in the corner, contains at least one mechanism for pumping fuels and lubricants, creating a compression force, a pressure gauge and at least one device that transforms the pneumohydraulic force into a mechanical compression force, fixed on the site, and the amount of the gap made between the bottom side of the metal structure and the bottom side of the metal frame of the tank container should not be less than the distance measured from the horizontal surface of the site to the top point of the device transforming pneumohydraulic force into mechanical force, when it is in a vertical position on the horizontal surface of the site in non-operating condition and should not be greater than the distance measured from the horizontal surface of the site to the top point of the device transforming pneumohydraulic force into mechanical force, when it is in a vertical position in working condition on a horizontal surface of the platform, and the size of the gap made between each of the three remaining sides of the metal structure and each of the three remaining sides of the metal frame of the tank container should not exceed 12 mm.

In a complex, the metal structure can consist of four planks.

In combination, the metal structure can be equipped with lifting lugs fixed on the top bar of the metal structure.

In combination with a metal structure, brackets made in the shape of the letter “L” can be used.

In combination, the metal structure can be reinforced with brackets in diagonally located places.

In the complex, the area of the platform can be larger than the base area of the device that transforms pneumohydraulic force into mechanical force.

The technical result is also achieved as a result of the inclusion in the complex of a metal structure of a closed contour of a rectangular shape, which, when installed on a rectangular metal frame of a closed contour, made with four fittings, comes into contact with three sides of the metal frame and creates resistance to the compression force, which is transmitted to the fittings by the metal frame of the structure tank container.

The technical result is also achieved due to the fact that the compression force is transferred to the metal frame of the tank container from a device that transforms the pneumohydraulic force into a mechanical compression force. In this case, the mechanism for pumping fuels and lubricants transfers the compression force to the device that transforms the pneumohydraulic force into a mechanical compression force.

The claimed utility model is illustrated by figures.

In fig. Figure 1 shows a metal structure installed on a tank container. In fig. 2 shows the metal structure. In fig. 3, fig. 4 and fig. Figure 5 shows installation diagrams of the tested tank containers in horizontal, vertical and inclined positions using the complex.

Positions in the figures are designated:

1 - metal structure that creates resistance to the compression force established in the technological documentation;

2 - lifting lugs;

3 - platform for a device that transforms pneumohydraulic force into mechanical force;

4 - hydraulic cylinder (a device that transforms pneumohydraulic force into mechanical force);

5 - hand pump (mechanism for pumping fuels and lubricants);

6 - pressure gauge;

7 - fitting, namely:

7.1 - upper left fitting;

7.2 - upper right fitting;

7.3 - lower left fitting;

7.4 - lower right fitting;

8 - lower strip of metal structure 1;

9 - bracket;

10 - truck crane;

11 - tank container;

12 - upper strip of metal structure 1;

13 - metal frame;

14 - stop;

15 - bottom side of metal frame 13.

The complex contains a metal structure 1, which includes four sides and is made, for example, with a lower bar 8 and an upper bar 12. The metal structure 1 creates resistance to the compression force established in the technological documentation. The complex contains a device that transforms pneumohydraulic force into mechanical force, for example, a hydraulic cylinder 4, a mechanism for pumping fuels and lubricants, for example, a hand pump 5, a pressure gauge 6, a locking device, for example, two stops 14. The complex may contain lifting lugs 2 and brackets 9.

The complex is used as follows.

Initially, for example, a metal structure 1 is secured to the lifting lugs 2 by a lifting device, for example, a truck crane 10. The metal structure 1 is made of slats that form a closed contour in the form of a rectangular frame, so the metal structure 1 is a rigid and durable structure. The lifting lugs 2 can be fixed, for example, on the top bar 12 of the metal structure 1.

Next, the metal structure 1 is moved to the location of the tank container 11 using the same lifting means.

Next, the metal structure 1 is installed on a metal frame 13 of a closed contour, shaped like a rectangle, made with four fittings 7 located in the corners of the metal frame 13, outside it. Fittings 7 are made of metal, with holes for hooks and have high strength. The metal frame 13 relates to the design of the tank container 11, since it is the end part of the frame of the tank container 11. The design of the tank container 11 includes two metal frames 13 of a closed contour. And the design of the metal frame 13 includes two horizontal and two vertical pipes (not shown), which are connected to each other by four fittings 7. The metal frame 13 includes four sides. Two horizontal and two vertical pipes and four fittings 7 are connected to each other by welding. Accordingly, the metal frame 13 is a rigid structure. The shape of the metal frame 13 is determined by the location of four fittings 7 in its corners. Accordingly, the rectangular shape of the metal structure 1 is due to the rectangular shape of the metal frame 13. The metal structure 1, consisting of strips, together forming a closed contour in the form of a rectangular frame, best retains its geometric parameters during operation. Therefore, this metal structure 1 has high operational reliability.

The dimensions of the metal structure 1 (height, width) were calculated in such a way that: the metal frame 13 fits completely inside the metal structure 1. The width and length of the metal structure 1 are proportional to the width and length of the metal frame 13 of the tank container 11. When using the complex, each of two upper fittings 7.1 and 7.2 with both sides must rest against the inner (upper) corners of the metal structure 1, and each of the two lower fittings 7.3 and 7.4 must be in contact with one of its vertical sides with the inside of the vertical strip of the metal structure 1, and the lower side of the fitting 7.3 and /or 7.4 must rest against a device that transforms pneumohydraulic force into mechanical force 4.

Between the bottom side of the metal structure 1, for example the bottom strip 8 of the metal structure 1, and the bottom 15 of the metal frame 13 of the tank container 11, a gap is provided to ensure that the metal frame 13 is placed inside the metal structure 1. The gap should not be less than the distance measured from the horizontal surface of the platform 3 to the top point of the device that transforms the pneumohydraulic force into mechanical force 4, when it is in a vertical position on the horizontal surface of the platform 3 in a non-working state. In this case, the gap should not be greater than the distance measured from the horizontal surface of platform 3 to the top point of the device that transforms pneumohydraulic force into mechanical force 4, when it is in a vertical position in operating condition on the horizontal surface of platform 3. Between the remaining sides of the metal structure 1, for example, with slats, and the remaining sides of the metal frame 13 also provide gaps. The amount of clearance provided between each of the three remaining sides of the metal structure 1, for example, each of the three remaining slats, and each of the three remaining sides of the metal frame 13 of the tank container 11 should not exceed 12 mm. If the gap is larger, it will be impossible to ensure the rigidity of the metal structure 1.

According to GOST 33549-2015, during multi-tier transportation of a tank container 11, for example, by sea, other tank containers 11 in an amount of up to eight pieces can be stacked on the tank container 11. Accordingly, the mechanical load is, first of all, transferred to the metal frame 13, namely, to the fittings 7 located in the corners of the metal frame 13. It has been experimentally confirmed that the presence of four fittings 7 installed in the corners of one metal frame 13, fixed on the end side tank container 11, and the presence of eight fittings 7 in the design of one tank container 11 provides optimal strength and rigidity of the tank container 11 structure.

Next, the metal structure 1 is fixed to the metal frame 13 of the tank container 11 using a locking device. Fixation can be carried out in different ways, for example, using two stops 14 fixed on the metal structure 1, which, if necessary, extend and support, that is, fix, the metal frame 13 in its working position. If you need to remove the fixation of the metal frame 13, then the stops 14 can be removed. Stops can be of different shapes and sizes.

After which, a compression force is created due to at least one mechanism for pumping fuels and lubricants. For example, you can use a hand pump 5. In the design of the tank container 11, namely in the metal frame 13, the necessary compression force is created, specified in the technological documentation for testing the tank container 11. That is, the magnitude of the compression force is included in the technological documentation for the tested container - tank 11. The required compression force for each fitting 7 of the tank container 11 must correspond to 55 tons (539365 Newton). The total compressive force exerted on the two fittings 7 is 110 tons. Next, the magnitude of the compression force is monitored using pressure gauge 6 according to the technological documentation, for example, visually. The technological documentation indicates not only the magnitude of the compression force, but also the method of its control. Since pressure gauge 6 shows the pressure value in units of measurement “Pascal (newton per square meter)”, when monitoring the magnitude of the compression force, the value of pressure measured in the units of measurement “Pascal (newton per square meter)” is converted into the value of compression force measured in Newton units. The technological documentation indicates the magnitude of the compression force.

Next, the compression force is transmitted from the mechanism for pumping fuels and lubricants, for example, from a hand pump 5, to at least one device that transforms the pneumohydraulic force into a mechanical compression force, for example, to a hydraulic cylinder 4. In this case, the device that transforms the pneumohydraulic force into mechanical the compression force is fixed on at least one platform 3, fixed inside the metal structure 1 in its lower corner on the lower side, for example, on the lower bar 8.

After which, the compression force is transmitted from the device that transforms the pneumohydraulic force into a mechanical compression force to the metal frame 13 and, accordingly, to the fittings 7 of the metal frame 13 of the tank container 11. Thus, the compression force is first created, and then it is transferred to the fittings 7 metal frame 13 of the tank container 11 (hereinafter it will be indicated - transferred to fittings 7).

If one mechanism for pumping fuels and lubricants and one device that transforms pneumohydraulic force into mechanical compression force are used, then the compression force is transmitted sequentially:

- the compression force is first transmitted to the metal frame 13 from one of its vertical sides; accordingly, the compression force is transmitted only to two fittings (7.1 and 7.3, located on one side of the metal frame 13). Fittings 7.1 and 7.3 transmit the compression force to the metal structure 1, and the metal structure 1 creates resistance to the compression force calculated as 55*2=110 tons;

- after which, the compression force is transferred to the metal frame 13 from its other vertical side, accordingly the compression force is transferred to the other two fittings (7.2 and 7.4 tank containers 11 located on the other side of the metal frame), and the metal structure 1 creates resistance to the compression force , calculated as 55*2=110 tons.

You can use, for example, two mechanisms for pumping fuels and lubricants at once, for example, two hand pumps 5 and two devices that transform pneumohydraulic force into mechanical compression force, for example, two hydraulic cylinders 4. In this case, one mechanism for pumping fuels and lubricants compression force transmits to one device that transforms pneumohydraulic force into mechanical compression force. In this case, one device, transforming the pneumohydraulic force into a mechanical compression force, transmits the compression force to two fittings (7.1 and 7.3) of the metal structure 1. The second device, transforming the pneumohydraulic force, transmits the compression force to two fittings (7.2 and 7.4) of the metal structure 1. The metal structure 1 creates resistance to the compression force, calculated as 55*4=220 tons.

In this case, the device that transforms the pneumohydraulic force into a mechanical compression force must be fixed on the platform 3 before starting work. The platform 3 must be fixed inside the metal structure 1 in its lower corners on its lower side, for example, on the lower bar 8. If one device that transforms pneumohydraulic force into mechanical compression force, then before starting work, it is first fixed on one platform 3 (oriented along the lower side of the metal structure 1, for example, along the bottom bar 8, and fixed inside the metal structure 1 in its lower corner on the bottom side, for example, on the bottom bar 8). After transferring the compression force to two fittings (7.1 and 7.3), this device, which transforms the pneumohydraulic force into mechanical compression force, is fixed on the second platform 3 (oriented along the lower side of the metal structure 1, for example, along the bottom bar 8, and fixed inside the metal structure 1 in its lower corner, on the bottom side, for example, on the bottom bar 8). The platforms 3 are necessary so that the device 4, which transforms the pneumohydraulic force into a mechanical compression force, when fixed, does not move relative to the metal frame 13 and the metal structure 1. The platforms 3 can be replaced during operation if they are deformed without changing the metal structure 1.

If necessary, carry out a visual inspection of the condition of the fittings 7 of the metal frame 13, and also measure their overall dimensions. If the compression force on the metal frame 13 is applied sequentially, first from one of its vertical sides, and then from its other vertical side, then a visual inspection of the condition of the fittings 7 of the metal frame 13, as well as measurement of their overall dimensions, if necessary, is carried out first from one end side of the container - tank 11, and then from the other end side of the tank container 11.

After that, all devices are turned off: the device (devices) transforming the pneumohydraulic force into mechanical compression force and the mechanism (mechanisms) for pumping fuels and lubricants, thereby eliminating the impact of compression forces on the metal frame 13. Next, the fixing device is removed, for example the stop 14, or the fixing devices are removed, for example, two stops 14, thereby eliminating the fixation of the metal frame 13 relative to the metal structure 1. Next, the metal structure 1 is fixed with a lifting means, for example, by the lifting lugs 2 and the metal structure is moved 1 to the second metal frame of the tank container 11, which is also the end part of the tank container 11 frame, using a lifting means. Thus, after testing the metal frame 13 located on one end side of the tank container 11, the metal structure 1 is moved to the other end side of the tank container 11.

After which, the strength of the second metal frame 13 of the tank container 11 is tested with the same number of devices transforming pneumohydraulic force into mechanical compression force, and the same number of mechanisms for pumping fuels and lubricants, in the same way and in the same sequence, - how the strength test of the first metal frame 13 was carried out.

Based on the results of testing the fittings 7 of both metal frames 13 of the design of the tank container 11, if necessary, a decision is made on the compliance of the design of the tank container 11 with GOST 33549-2015. If, according to the results of the strength test, at least one fitting 7 is damaged, namely, destroyed, deformed, for example, bent, then, accordingly, after a visual inspection, carried out as necessary, it will be concluded that the design of the tank container 11 has not passed the test for strength by compression method.

If the structure of the tank container and, accordingly, the fittings 7 are not tested for strength by the compression method, then, for example, during sea transportation, when the structure of the tank container 11 is loaded, its destruction may occur. Namely, first there will be destruction of the fittings 7 of the metal frame 13 of the structure of the tank container 11, then the rupture of the welds of the horizontal and vertical pipes of the metal frame 13 or their deformation, and then the destruction of the container of the tank container 11. As a result, the entire contents of the container container - tank 11 may be outside the tank container 11.

Thus, thanks to the claimed invention, used for its intended purpose, the problem of meeting the requirements for mandatory testing of tank container structures 11 for strength with various technical characteristics and with minimal labor costs is solved.

In total, the metal structure 1 may consist of four slats. This design ensures the best manufacturability.

To move a metal structure 1, either an overhead crane, a jib crane, or a truck crane 10 can be used. A jib crane, an overhead crane, and a truck crane 10 are among the most convenient and most technologically advanced devices for moving a metal structure 1.

In combination, the metal structure 1 can be equipped with lifting lugs 2, fixed on the upper side of the metal structure 1, for example, on the bottom bar 12. The presence of lifting lugs 2, fixed on the top bar of the metal structure 1, ensures the best production manufacturability.

In combination, the metal structure 1 can be reinforced with brackets 9 located in diagonally located places of the metal structure 1 (in its corners). If the metal structure 1 is reinforced with brackets 9, then due to their presence it is possible to increase the strength of the metal structure 1.

In combination, in the metal structure 1 of the tank container 11, brackets 9 made in the shape of the letter “L” can be used. This design also provides the best manufacturability.

In the complex, the area of the platform 3 can be larger than the area of the base of the device that transforms pneumohydraulic force into mechanical force to maintain the stability of this device. Fulfillment of this condition makes it possible not to additionally fix on site 3 the device that transforms the pneumohydraulic force into mechanical force in order to maintain its stability.

Examples of using the complex.

1 Example.

A metal structure made of four strips forming a closed contour in the form of a rectangular frame is fixed with an overhead crane using lifting lugs fixed on the top strip of the metal structure, while the metal structure is reinforced with brackets in diagonally located places. Brackets made in the shape of the letter “L”. The metal structure is also moved to the tank container using an overhead crane. The metal structure is installed on a closed-loop metal frame, which is part of the tank container structure and is made with four fittings located in the corners of the metal frame. In this case, the metal frame is shaped like a rectangle and is the end part of the frame of the tank container. Next, the metal structure is fixed to the metal frame of the tank container using stops fixed to the metal structure. After this, a compression force is created using a hand pump. In this case, one hand pump is used. Next, visual control of the magnitude of the compression force is carried out using a pressure gauge in accordance with the technological documentation, since the magnitude of the compression force and the control method are indicated in it. In this case, the hydraulic cylinder must first be fixed on one of two platforms fixed inside the metal structure in its lower corners on the lower bar. Next, the compression force is transmitted from one hand pump to one hydraulic cylinder. The hydraulic cylinder, in turn, transmits the compression force to two fittings on one vertical side of the metal frame. After which, the hydraulic cylinder is turned off and disconnected from this platform and secured to the second platform. After that, a compression force is created (a second time) with the same hand pump. Next, visual control of the magnitude of the compression force is carried out using a pressure gauge in accordance with the technological documentation. After which, the compression force is transferred from the hand pump to the hydraulic cylinder, and it transmits the compression force to the remaining two fittings located on the other vertical side of the metal frame. After that, the hydraulic cylinder and hand pump are turned off, thereby eliminating the impact of the compression force on the metal frame. Next, the stops are removed, thereby eliminating the fixation of the metal frame relative to the metal structure. Next, the metal structure is fixed and the metal structure is moved with an overhead crane to the second end of the tank container, thereby freeing the metal frame. After that, a visual inspection of the condition of the fittings is carried out and their overall dimensions are measured.

After that, the strength test of the second metal frame of the tank container is also carried out with one hand pump and one hydraulic cylinder in the same way as the strength test of the first metal frame of the tank container was previously carried out. Based on the results of a visual inspection and measurement of the overall dimensions of the fittings, a decision is made on the compliance of the tank container design with GOST 33549-2015.

There is a gap between the bottom strip of the metal structure and the bottom side of the metal frame of the tank container. The gap should not be less than the distance measured from the horizontal surface of the platform to the top point of the device that transforms pneumohydraulic force into mechanical force when it is in a vertical position on the horizontal surface of the platform in non-operating condition. In this case, the gap should not be greater than the distance measured from the horizontal surface of the platform to the top point of the device that transforms pneumohydraulic force into mechanical force when it is in a vertical position in operating condition on the horizontal surface of the platform. There are also gaps between the remaining sides of the metal structure, for example, the slats, and the remaining sides of the metal frame. The size of the gap between each of the three remaining strips and each of the three remaining sides of the metal frame of the tank container is 10 mm.

2 Example.

The metal structure, made of four strips forming a closed contour in the form of a rectangular frame, is fixed using a jib crane to the lifting lugs fixed on the top strip of the metal structure, while the metal structure is reinforced with brackets in diagonally located places. Brackets made in the shape of the letter “L”. The metal structure is also moved to the tank container using a jib crane. The metal structure is installed on a closed-loop metal frame, which is part of the tank container structure and is made with four fittings located in the corners of the metal frame. In this case, the metal frame is shaped like a rectangle and is the end part of the frame of the tank container. Next, the metal structure is fixed to the metal frame of the tank container using stops fixed to the metal structure. Next, the hydraulic cylinders are fixed on two platforms fixed inside the metal structure in its lower corners on the lower bar. After that, a compression force is created using two hand pumps. Two hand pumps are used. Next, visually monitor the magnitude of the compression force on both hand pumps using pressure gauges in accordance with the technological documentation, since the magnitude of the compression force is indicated therein. Next, compression forces from two hand pumps are simultaneously transmitted to two hydraulic cylinders, as shown in Fig. 1. After that, two hydraulic cylinders simultaneously transmit compression forces to four fittings, while one hydraulic cylinder transmits compression forces to two fittings located on one side of the metal frame (bottom and top), and the second hydraulic cylinder transmits compression forces to two fittings located on the other side of the metal frame (bottom and top). After which, the hydraulic cylinders and hand pumps are turned off, thereby eliminating the impact of compression forces on the metal frame. Next, the stops are removed, thereby eliminating the fixation of the metal frame relative to the metal structure. Next, fix the metal structure with an overhead crane by the lifting lugs and move the metal structure to the second end of the tank container using an overhead crane, thereby freeing the metal frame. After that, a visual inspection of the condition of the fittings is carried out and their overall dimensions are measured.

Next, the strength of the second metal frame of the tank container is tested using two hand pumps and two hydraulic cylinders in the same way as the strength test of the first metal frame of the tank container was previously tested. After that, a visual inspection of the condition of the fittings is carried out and their overall dimensions are measured.

Based on the test results of two metal frames, a decision is made on the compliance of the tank container design with GOST 33549-2015.

There is a gap between the bottom strip of the metal structure and the bottom side of the metal frame of the tank container. The gap should not be less than the distance measured from the horizontal surface of the platform to the top point of the device that transforms pneumohydraulic force into mechanical force when it is in a vertical position on the horizontal surface of the platform in non-operating condition. In this case, the gap should not be greater than the distance measured from the horizontal surface of the platform to the top point of the device that transforms pneumohydraulic force into mechanical force when it is in a vertical position in operating condition on the horizontal surface of the platform. There are also gaps between the remaining sides of the metal structure, for example, the slats, and the remaining sides of the metal frame. The size of the gap between each of the three remaining strips and each of the three remaining sides of the metal frame of the tank container is 8 mm.

Claims (6)

1. A complex for testing the structural strength of a tank container using the compression method, including a metal frame with four sides, containing a metal structure made of strips forming a closed contour in the form of a rectangular frame, the width and length of which are made proportional to the width and length of the metal frame of the container - tanks, the metal structure contains a fixing device, and inside it, at least one platform is fixed on the bottom bar, located in the corner, contains at least one mechanism for pumping fuel and lubricants, creating a compression force, a pressure gauge and at least at least one device that transforms the pneumohydraulic force into a mechanical compression force, fixed on the platform, while the size of the gap made between the bottom side of the metal structure and the bottom side of the metal frame of the tank container should not be less than the distance measured from the horizontal surface of the site to the top point of the device that transforms pneumohydraulic force into mechanical force, when it is in a vertical position on the horizontal surface of the platform in an inoperative state, and should not be greater than the distance measured from the horizontal surface of the platform to the top point of the device that transforms pneumohydraulic force into mechanical force force when it is in a vertical position in working condition on a horizontal surface of the platform, and the size of the gap made between each of the three remaining sides of the metal structure and each of the three remaining sides of the metal frame of the tank container should not exceed 12 mm. 2. The complex according to claim 1, characterized in that the metal structure consists of four slats. 3. The complex according to claim 1, characterized in that the lifting lugs of the metal structure are fixed on the top bar of the metal structure. 4. The complex according to claim 1, characterized in that the metal structure is reinforced with brackets in diagonally located places. 5. The complex according to claim 4, characterized in that the metal structure uses brackets made in the shape of the letter “G”. 6. The complex according to claim 1, characterized in that the area of the platform is larger than the base area of the device that transforms pneumohydraulic force into mechanical force.