Sand blowing device in heat supply pipeline and using method of sand blowing device

Abstract

The invention discloses a heat supply pipeline inner sand blowing device which comprises a sand blasting machine and a protective outer pipe, a sand blasting pipe of the sand blasting machine extends to the top of the protective outer pipe, a heat preservation inner pipe is arranged in the protective outer pipe and located below the sand blasting pipe, and a buffer air cushion is arranged between the bottom of the heat preservation inner pipe and the bottom of the protective outer pipe. According to the sand blowing device in the heat supply pipeline, by arranging the sand blowing device in the heat supply pipeline, by means of the gravity of sand in the protective outer pipe during sand blowing, the heat preservation inner pipe rises automatically, the sand enters the buffer air cushion automatically, the sand blowing efficiency is improved, and the sand blowing efficiency is improved. Therefore, the bottom of the heat preservation inner pipe and the bottom of the protection outer pipe can be covered with the sand, even if the sand cannot enter the buffer air cushion, the expanded buffer air cushion can achieve the buffer effect, and hard contact between the heat preservation inner pipe and the protection outer pipe is avoided.

Description

Technical Field

[0001] The invention relates to the field of pipelines, and in particular to a sand blowing device in a heating pipeline and a use method thereof. Background Art

[0002] At present, most of the heating pipes used for heating are pressure pipes, including internal insulation pipes and external protective pipes for heating. In order to prevent the pipelines from being damaged by external force after being buried, to prevent the insulation pipes from moving left and right in the protective pipes when the water supply pressure is high, and to prevent the insulation pipes and the external protective pipes from being damaged by mutual friction, sand blowing equipment is required to fill the gap between the insulation pipes and the protective pipes.

[0003] The patent with application number 202010425967.X discloses a pipeline sand blasting backfill device, which belongs to the technical field of engineering flood control devices, including a sand blasting main pipe, one side of the sand blasting main pipe is interconnected with a conduit, and a flange A is welded to the top of the conduit, a knife gate valve is detachably connected between the flange A and the flange B, and the flange B is welded to the head end of the tube body of the sand induction pipe, and a pipe arrangement bag is sleeved on the rear end of the tube body of the sand induction pipe, and flanges C are welded at the pipe openings at both ends of the sand blasting main pipe, and an inner pipe is arranged in the middle of the flange C of the sand blasting main pipe. After the flange C is connected with the flange D of the external pipe, it is locked with bolts. At this time, the inner pipe passes through the flange D and fits against the inner wall of the external pipe, and the clamping ring on the outside of the inner pipe is connected to the inner wall groove of the flange D for sealing, and the connection sealing between the sand blasting main pipe and the external pipe is optimized by the mosaic sealing structure such as the inner pipe and the clamping ring.

[0004] The patent application number 201711296836.0 discloses a sand blowing backfill device for engineering construction pipelines, and discloses a filtering device that separates mortar and stones by intercepting an inner rotating drum and rotating and pushing back to form an impact to impact and crush the agglomerates. It is characterized in that the side wall of the main body box is provided with multiple mounting holes along the circumferential direction, and close to one end of the main body tube, multiple guide sleeves are correspondingly placed in the mounting holes, screws are respectively arranged on both sides of the guide sleeves, the screws are parallel to each other, the two ends of the guide plate are correspondingly sleeved on the screws, and are limited by nuts, one end of the guide rod is vertically placed in the middle position of the guide plate, and the other end passes through the guide sleeve and is placed in the main body tube, the support wheel is provided with the other end of the guide rod, the reset spring sleeve is placed on the guide rod, and is located between the guide plate and the guide sleeve, the multiple support wheels are located on the same plane, the sealing box is placed in the main body box, and is located at the other end of the main body box, the driving motor is placed in the sealing box, and the connecting shaft is placed on the motor shaft of the driving motor, and is coaxial with the main body box.

[0005] However, the above patent and similar patents have the following problems when used for sand blasting of insulated pipes: since the bottom of the insulation pipe is in contact with the bottom of the protective pipe, there is no sand between the bottom of the insulation pipe and the bottom of the protective pipe after sand blasting, and the bottom of the insulation pipe and the bottom of the protective pipe are the most susceptible to wear, resulting in a greatly reduced effect of sand blasting protection. Summary of the invention

[0006] The object of the present invention is to provide a sand blowing device in a heating pipeline and a method of using the same to solve the above technical problems.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0008] A sand blasting device in a heating pipeline comprises a sand blasting machine and a protective outer tube, the sand blasting tube of the sand blasting machine extends to the top of the protective outer tube, an insulating inner tube is arranged inside the protective outer tube, the insulating inner tube is located below the sand blasting tube, a buffer air cushion is arranged between the bottom of the insulating inner tube and the bottom of the protective outer tube, the top surface of the buffer air cushion is in contact with the bottom of the insulating inner tube, the bottom surface of the buffer air cushion is in contact with the inner bottom of the protective outer tube, a first air bag, a second air bag, a third air bag, a fourth air bag, and a fifth air bag are arranged on both sides of the insulating inner tube, the outer wall of the insulating inner tube cooperates with the inner wall of the protective outer tube to clamp the first air bag, the second air bag, the third air bag, the fourth air bag, and the fifth air bag, the first air bag, the second air bag, the third air bag, the fourth air bag, and the fifth air bag are arranged in sequence from top to bottom, the first air bag, the second air bag, the third air bag, the fourth air bag, and the fifth air bag are fixedly connected and connected in sequence, and the fifth air bag is connected to the buffer air cushion through a plurality of connecting mechanisms.

[0009] Preferably, a valve core is installed at the end of the first airbag.

[0010] Preferably, the connecting mechanism includes a sealing piston, which passes through the fifth airbag and the buffer air cushion in sequence, and is respectively fixedly connected to the fifth airbag and the buffer air cushion. A guide tube is provided through the center of the sealing piston, and the guide tube is slidably connected to the sealing piston. A buffer spring is sleeved on the guide tube, and one end of the buffer spring is fixedly connected to the guide tube, and the other end of the buffer spring is fixedly connected to the sealing piston.

[0011] Preferably, the connecting mechanism also includes a first limiting plate, which is located in the fifth airbag, and the first limiting plate is fixedly sleeved on the end of the guide tube, and the first limiting plate is fixedly connected to the guide tube, and the edge of the first limiting plate is fixedly connected to one end of a plurality of oblique support rods, and the other end of the oblique support rods is fixedly connected to the inner wall of the fifth airbag, and the plurality of oblique support rods are arranged in a circular array around the first limiting plate.

[0012] Preferably, the connecting mechanism also includes a cannula, which is located in the guide tube and slidingly cooperates with the guide tube. A spike is provided at one end of the cannula, and a second limiting plate is sleeved on the other end of the cannula. The cannula is fixedly connected to the second limiting plate, and the edge of the second limiting plate is fixedly connected to one end of a plurality of connecting rods, and the other end of the connecting rod is fixedly connected to a buffer air cushion, and the plurality of connecting rods are arranged in a circular array around the second limiting plate.

[0013] Preferably, a mounting hole is provided through the bottom of the thermal insulation inner tube, the bottom end of the mounting hole is fixedly connected to and communicated with the buffer air cushion, and an alarm mechanism is installed in the mounting hole.

[0014] Preferably, the alarm mechanism includes a top cover, the bottom of the top cover is in a truncated cone shape, a guide column is arranged below the top cover, the upper end of the guide column is fixedly connected to the bottom end of the top cover, the guide column is inserted into the mounting hole, an elastic cover is sleeved on the top of the top cover, the elastic cover is fixedly connected to the top cover, and the edge of the elastic cover is fixedly connected to the inner wall of the thermal insulation inner tube.

[0015] Preferably, a plurality of clickers are provided on the bottom edge of the top cover, and the plurality of clickers are arranged in a circular array around the top cover, and the bottom of the clicker is connected to the top cover via a torsion spring.

[0016] Preferably, the diameter of the guide column is smaller than the diameter of the mounting hole.

[0017] The beneficial effects of the present invention are:

[0018] The present invention provides a sand blowing device in the heating pipeline. When blowing sand, the heat-insulating inner pipe is automatically raised by the gravity of the sand in the protective outer pipe, and the sand automatically enters the buffer air cushion, so that the bottom of the heat-insulating inner pipe and the bottom of the protective outer pipe can also be covered by sand. Even if the sand cannot enter the buffer air cushion, the expanded buffer air cushion can also play a buffering effect, avoiding hard contact between the heat-insulating inner pipe and the protective outer pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a sand blowing device in a heating pipeline and a method of using the same according to the present invention;

[0020] Figure 2 The present invention provides a sand blowing device in a heating pipeline and a method for using the same Figure 1 A magnified schematic diagram of part A;

[0021] Figure 3 The structural diagram of the connection mechanism of the sand blowing device in the heating pipeline and the method for using the device is shown in FIG. Figure 1 ;

[0022] Figure 4 The structural diagram of the connection mechanism of the sand blowing device in the heating pipeline and the method for using the device is shown in FIG. Figure 2 ;

[0023] Figure 5 It is a schematic structural diagram of a pipe insertion of a sand blowing device in a heating pipeline and a method for using the same according to the present invention;

[0024] Figure numerals: 1. Protective outer tube; 2. Insulated inner tube; 3. First airbag; 4. Valve core; 5. Elastic cover; 6. Clicker; 7. Torsion spring; 8. Top cover; 9. Guide column; 10. Mounting hole; 11. Buffer air cushion; 12. Buffer spring; 13. Sealing piston; 14. Oblique support rod; 15. First limit plate; 16. Guide tube; 17. Second limit plate; 18. Connecting rod; 19. Insert tube; 20. Spike; 21. Second airbag; 22. Third airbag; 23. Fourth airbag; 24. Fifth airbag. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0026] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Example 1

[0029] like Figure 1-5 As shown, a sand blasting device in a heating pipeline includes a sand blasting machine and a protective outer tube 1. The sand blasting tube of the sand blasting machine extends to the top of the protective outer tube 1. An insulating inner tube 2 is arranged inside the protective outer tube 1. The insulating inner tube 2 is located below the sand blasting tube.

[0030] When in use, the insulating inner tube 2 is used to transport heating water. The sandblasting machine is started, and the sandblasting machine blows sand into between the protective outer tube 1 and the insulating inner tube 2 through the sandblasting tube, so that the sand fills the gap between the protective outer tube 1 and the insulating inner tube 2.

[0031] Example 2

[0032] like Figure 1-5 As shown, in the case where other parts are the same as those of Example 1, the difference between this embodiment and Example 1 is that a buffer air cushion 11 is arranged between the bottom of the thermal insulation inner tube 2 and the bottom of the protective outer tube 1, the top surface of the buffer air cushion 11 contacts the bottom of the thermal insulation inner tube 2, the bottom surface of the buffer air cushion 11 contacts the inner bottom of the protective outer tube 1, the left and right sides of the thermal insulation inner tube 2 are both provided with a first air bag 3, a second air bag 21, a third air bag 22, a fourth air bag 23, and a fifth air bag 24, and the thermal insulation inner tube 2 The outer wall cooperates with the inner wall of the protective outer tube 1 to clamp the first airbag 3, the second airbag 21, the third airbag 22, the fourth airbag 23, and the fifth airbag 24. The first airbag 3, the second airbag 21, the third airbag 22, the fourth airbag 23, and the fifth airbag 24 are arranged in sequence from top to bottom. The first airbag 3, the second airbag 21, the third airbag 22, the fourth airbag 23, and the fifth airbag 24 are fixedly connected and connected in sequence. The fifth airbag 24 is connected to the buffer air cushion 11 through multiple connecting mechanisms.

[0033] The valve core 4 is installed at the end of the first airbag 3. The connecting mechanism includes a sealing piston 13, which passes through the fifth airbag 24 and the buffer air cushion 11 in sequence. The sealing piston 13 is fixedly connected to the fifth airbag 24 and the buffer air cushion 11 respectively. A guide tube 16 is provided through the center of the sealing piston 13, and the guide tube 16 is slidably connected to the sealing piston 13. A buffer spring 12 is sleeved on the guide tube 16, one end of the buffer spring 12 is fixedly connected to the guide tube 16, and the other end of the buffer spring 12 is fixedly connected to the sealing piston 13. The connecting mechanism also includes a first limiting plate 15, which is located in the fifth airbag 24, the first limiting plate 15 is fixedly sleeved on the end of the guide tube 16, the first limiting plate 15 is fixedly connected to the guide tube 16, the edge of the first limiting plate 15 is fixedly connected to one end of a plurality of oblique support rods 14, the other end of the oblique support rods 14 is fixedly connected to the inner wall of the fifth airbag 24, and the plurality of oblique support rods 14 are arranged in a circular array around the first limiting plate 15. The connecting mechanism also includes an insert tube 19, which is located in the guide tube 16 and is slidably matched with the guide tube 16. A spike 20 is provided at one end of the insert tube 19, and a second limiting plate 17 is sleeved on the other end of the insert tube 19. The insert tube 19 is fixedly connected to the second limiting plate 17. The edge of the second limiting plate 17 is fixedly connected to one end of a plurality of connecting rods 18, and the other end of the connecting rods 18 is fixedly connected to the buffer air cushion 11. The plurality of connecting rods 18 are arranged in a circular array around the second limiting plate 17.

[0034] After the sand is blown into the protective outer tube 1, the sand slides along the outer wall of the thermal insulation inner tube 2 to the left and right sides of the thermal insulation inner tube 2. As the sand on the left and right sides of the thermal insulation inner tube 2 accumulates more and more, the sand presses down the first airbag 3, and presses the air in the first airbag 3 into the remaining airbags and the buffer air cushion 11. When the first airbag 3 is flattened, the sand begins to squeeze the second airbag 21 below, and finally the sand gradually fills the left and right sides of the thermal insulation inner tube 2. The air in the first airbag 21, the second airbag 21, the third airbag 22, the fourth airbag 23, and the fifth airbag 24 is all compressed into the buffer air cushion 11, so that the buffer air cushion 11 is inflated to lift the thermal insulation inner tube 2 upward.

[0035] As more and more sand accumulates in the protective outer tube 1, the first airbag 3, the second airbag 21, the third airbag 22, the fourth airbag 23, and the fifth airbag 24 are continuously squeezed, and the compressed fifth airbag 24 squeezes and pushes the first limit plate 15, so that the guide tube 16 is inserted into the sealing piston 13, thereby exposing the spike 20 of the insertion tube 19 originally hidden in the guide tube 16, so that the spike 20 pierces the first airbag 21, the second airbag 21, the third airbag 22, the fourth airbag 23, and the fifth airbag 24, and penetrates into the sand inside the protective outer tube 1, so that the sand enters the buffer air cushion 11 through the insertion tube 19, so that the buffer air cushion 11 is filled with sand, so that the space between the bottom of the thermal insulation inner tube 2 and the bottom of the protective outer tube 1 can also be filled with sand.

[0036] Example 3

[0037] like Figure 1-5 As shown, in the case where other parts are the same as those of Example 2, the difference between this embodiment and Example 2 is that: a mounting hole 10 is provided through the bottom of the thermal insulation inner tube 2, the bottom end of the mounting hole 10 is fixedly connected and communicated with the buffer air cushion 11, and an alarm mechanism is installed in the mounting hole 10. The alarm mechanism includes a top cover 8, the bottom of the top cover 8 is in a truncated cone shape, a guide column 9 is provided below the top cover 8, the upper end of the guide column 9 is fixedly connected to the bottom end of the top cover 8, the guide column 9 is inserted into the mounting hole 10, and an elastic cover 5 is sleeved on the top of the top cover 8, the elastic cover 5 is fixedly connected to the top cover 8, and the edge of the elastic cover 5 is fixedly connected to the inner wall of the thermal insulation inner tube 2. The diameter of the guide column 9 is smaller than the diameter of the mounting hole 10. A plurality of clickers 6 are provided at the bottom edge of the top cover 8, and the plurality of clickers 6 are arranged in a circular array around the top cover 8, and the bottom of the clickers 6 is connected to the top cover 8 through a torsion spring 7.

[0038] When there is sand between the bottom of the thermal insulation inner tube 2 and the bottom of the protective outer tube 1, the elastic force of the elastic cover 5 drives the top cover 8 and the guide column 9 to move downward, so that the guide column 9 is inserted into the sand. At this time, the top cover 8 presses the clicker 6 on the top of the installation hole 10, and the clicker 6 cannot make a sound.

[0039] When there is no sand between the bottom of the thermal insulation inner tube 2 and the bottom of the protective outer tube 1, and the buffer air cushion 11 is deflated and the bottom of the thermal insulation inner tube 2 is in hard contact with the bottom of the protective outer tube 1, the top cover 8 and the guide column 9 are pushed upward. At this time, the top cover 8 no longer presses the clicker 6. Under the impact of the water flow in the thermal insulation inner tube 2, the clicker 6 makes a sound. By monitoring the sound of the clicker 6, it can be determined whether there is sand or buffer air cushion 11 between the bottom of the thermal insulation inner tube 2 and the bottom of the protective outer tube 1.

[0040] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A sandblasting device for a heating pipeline, comprising a sandblasting machine and a protective outer tube (1), wherein the sandblasting tube of the sandblasting machine extends to the top of the protective outer tube (1), an insulating inner tube (2) is arranged inside the protective outer tube (1), and the insulating inner tube (2) is located below the sandblasting tube, characterized in that: A buffer air cushion (11) is arranged between the bottom of the thermal insulation inner tube (2) and the bottom of the protective outer tube (1); the top surface of the buffer air cushion (11) contacts the bottom of the thermal insulation inner tube (2); the bottom surface of the buffer air cushion (11) contacts the inner bottom of the protective outer tube (1); the left and right sides of the thermal insulation inner tube (2) are both provided with a first air bag (3), a second air bag (21), a third air bag (22), a fourth air bag (23), and a fifth air bag (24); the outer wall of the thermal insulation inner tube (2) cooperates with the inner wall of the protective outer tube (1) to clamp the first air bag (3), a second airbag (21), a third airbag (22), a fourth airbag (23), and a fifth airbag (24); the first airbag (3), the second airbag (21), the third airbag (22), the fourth airbag (23), and the fifth airbag (24) are arranged in sequence from top to bottom; the first airbag (3), the second airbag (21), the third airbag (22), the fourth airbag (23), and the fifth airbag (24) are fixedly connected and connected in sequence; and the fifth airbag (24) is connected to the buffer air cushion (11) via a plurality of connecting mechanisms.

2. The sand blowing device in a heating pipeline according to claim 1, characterized in that: A valve core (4) is installed at the end of the first air bag (3).

3. The sand blowing device in a heating pipeline according to claim 2, characterized in that: The connecting mechanism comprises a sealing piston (13), the sealing piston (13) passes through the fifth airbag (24) and the buffer air cushion (11) in sequence, the sealing piston (13) is fixedly connected to the fifth airbag (24) and the buffer air cushion (11) respectively, a guide tube (16) is provided through the center of the sealing piston (13), the guide tube (16) is slidably connected to the sealing piston (13), a buffer spring (12) is sleeved on the guide tube (16), one end of the buffer spring (12) is fixedly connected to the guide tube (16), and the other end of the buffer spring (12) is fixedly connected to the sealing piston (13).

4. The sand blowing device in a heating pipeline according to claim 3, characterized in that: The connecting mechanism also includes a first limiting plate (15), the first limiting plate (15) is located in the fifth airbag (24), the first limiting plate (15) is fixedly sleeved on the end of the guide tube (16), the first limiting plate (15) is fixedly connected to the guide tube (16), the edge of the first limiting plate (15) is fixedly connected to one end of a plurality of oblique support rods (14), the other end of the oblique support rods (14) is fixedly connected to the inner wall of the fifth airbag (24), and the plurality of oblique support rods (14) are arranged in a circular array around the first limiting plate (15).

5. The sand blowing device in a heating pipeline according to claim 4, characterized in that: The connecting mechanism also includes an insert tube (19), the insert tube (19) is located in the guide tube (16), the insert tube (19) and the guide tube (16) are slidably matched, one end of the insert tube (19) is provided with a spike (20), the other end of the insert tube (19) is sleeved with a second limiting plate (17), the insert tube (19) is fixedly connected to the second limiting plate (17), the edge of the second limiting plate (17) is fixedly connected to one end of a plurality of connecting rods (18), the other end of the connecting rods (18) is fixedly connected to the buffer air cushion (11), and the plurality of connecting rods (18) are arranged in a circular array around the second limiting plate (17).

6. The sand blowing device in a heating pipeline according to claim 5, characterized in that: A mounting hole (10) is provided through the bottom of the thermal insulation inner tube (2); the bottom end of the mounting hole (10) is fixedly connected to and communicates with the buffer air cushion (11); and an alarm mechanism is installed in the mounting hole (10).

7. The sand blowing device in a heating pipeline according to claim 6, characterized in that: The alarm mechanism comprises a top cover (8), the bottom of the top cover (8) is in a truncated cone shape, a guide column (9) is arranged below the top cover (8), the upper end of the guide column (9) is fixedly connected to the bottom end of the top cover (8), the guide column (9) is inserted into the mounting hole (10), an elastic cover (5) is sleeved on the top of the top cover (8), the elastic cover (5) is fixedly connected to the top cover (8), and the edge of the elastic cover (5) is fixedly connected to the inner wall of the thermal insulation inner tube (2).

8. The sand blowing device in a heating pipeline according to claim 7, characterized in that: A plurality of clickers (6) are arranged at the bottom edge of the top cover (8), and the plurality of clickers (6) are arranged in a circular array around the top cover (8), and the bottom of the clicker (6) is connected to the top cover (8) via a torsion spring (7).

9. The sand blowing device in a heating pipeline according to claim 8, characterized in that: The diameter of the guide column (9) is smaller than the diameter of the mounting hole (10).

10. The method for using the sand blowing device in a heating pipeline according to claim 9, characterized in that: The method comprises the following steps: when sand is blown into the protective outer tube (1), the sand slides along the outer wall of the heat-insulating inner tube (2) to the left and right sides of the heat-insulating inner tube (2); as the sand on the left and right sides of the heat-insulating inner tube (2) accumulates more and more, the sand presses down the first airbag (3), and the air in the first airbag (3) is pressed into the remaining airbags and the buffer air cushion (11); when the first airbag (3) is flattened, the sand begins to squeeze the second airbag (21) below, and finally the sand gradually fills the left and right sides of the heat-insulating inner tube (2); the air in the first airbag (3), the second airbag (21), the third airbag (22), the fourth airbag (23), and the fifth airbag (24) is completely compressed into the buffer air cushion (11), so that the buffer air cushion (11) is inflated and expands to lift the heat-insulating inner tube (2) upward.

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