Plug structure at tail end of heating and ventilation pipeline

Abstract

The utility model discloses a screwed plug structure at the tail end of a heating and ventilation pipeline, which relates to the technical field of air cooler pipe boxes and comprises a threaded pipe, a plug block is integrally formed on the inner wall of the threaded pipe, a central pipe penetrates through the interior of the plug block, and an inflatable bag capable of expanding and deforming is fixed at one end of the central pipe through a plastic film connected in a gluing manner. The air pressure intensity borne by the inflatable bag is transmitted to the barometer through the central pipe. The air pressure detection structure is connected in the threaded pipe in a penetrating mode, the air inflation bag serves as a receptor of the air pressure detection structure, pressure in the threaded pipe can be transmitted through the central pipe, meanwhile, the pressure intensity in the threaded pipe is indicated through changes of the air pressure intensity in the air inflation bag, and the pressure in the threaded pipe can be accurately detected through regular observation of the air pressure indication number. The use duration and the use state of the threaded pipe can be deduced according to the use state of the inflation bag, the maintenance difficulty of the screwed plug structure is reduced, and the air tightness of the heating and ventilation pipeline is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of air cooler pipe boxes, in particular to a thread plugging structure at the end of a heating and ventilation pipeline. Background Art

[0002] The thread plug type air cooler tube box is also called the plug type air cooler tube box. The structure is usually that there is a thread plug (i.e., screw plug) at the end of each finned tube, which is convenient for expanding the finned tube during assembly and cleaning the tube bundle during maintenance. This type of tube box is used as a basic type because of its simple manufacturing and is widely used in medium and low pressure tube bundles. Existing thread plugs are often connected to the pipeline through the surface threads. Although they can provide a certain dust and leak-proof structure for the pipeline opening and facilitate the pipeline's own pressure resistance test, it is difficult for the existing thread plugs to quantify the pressure at the connection with the pipeline, and it is difficult for maintenance personnel to know the degree of wear of the thread plug, which delays the replacement of the thread plug, affects the normal use of the pipeline, and makes it difficult for maintenance personnel to inspect and maintain, which is not conducive to the sealing connection at the pipeline opening. To this end, we propose a thread plug structure at the end of the HVAC pipeline that can reduce the difficulty of maintenance and prevent delays in the replacement of the thread plug structure. Utility Model Content

[0003] The utility model aims to provide a thread plugging structure at the end of a HVAC pipeline to solve the problems raised in the above-mentioned background technology.

[0004] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a thread plug structure at the end of a HVAC pipe, comprising a threaded pipe, the threaded pipe is connected to the HVAC pipe thread by threads on its surface, a plug is integrally formed on the inner wall of the threaded pipe, the plug is used to plug the internal channel of the threaded pipe, a center tube runs through the inside of the block, the center tube serves as an air pressure detection channel, an inflatable and deformable air bag is fixed to one end of the center tube by a plastic film connected by gluing, the air bag serves as a sensor of the air pressure detection structure, the air pressure strength of the air bag is transmitted to the barometer through the center tube, and the center tube is connected to the air pressure sensor by gluing the center tube. A pressure gauge is installed at the other end of the core tube relative to the end where the inflatable bag is located, and an inflation and exhaust structure is connected through the surface of the center tube. The inflation and exhaust structure can pump or exhaust the gas in the inflatable bag. When the gas inside the inflatable bag is discharged, the volume of the inflatable bag can be reduced, which is convenient for the connection between the threaded tube and the external HVAC pipe. A hexagonal welding block is coaxially welded at one end of the threaded tube. The hexagonal welding block can be used as a clamping end for rotating the threaded tube. A force transmission tool that is compatible with the hexagonal welding block, such as a wrench or pliers, is used to clamp the hexagonal welding block, and the threaded tube can be further driven to rotate by rotating the hexagonal welding block.

[0005] As a further solution of the utility model: a rounded surface is provided at the opening of one end of the threaded tube, and the rounded surface can reduce the degree of wear on the surface of the airbag body.

[0006] As a further solution of the utility model: the inflatable bag includes a drainage tube and an airbag body. The drainage tube runs through the interior of the central tube tangently coaxially. The length of the drainage tube is equal to the length of the central tube. The airbag body is connected to the drainage tube and is integrally formed with the drainage tube. The pressure changes in the airbag body are transmitted to the pressure gauge through the central tube, and the changes in air pressure at one end of the central tube are detected by the pressure gauge.

[0007] As a further solution of the utility model: the airbag body is a hollow round cake-shaped flexible closed silicone membrane, and the maximum cross-section of the airbag body does not exceed the maximum cross-section of the threaded pipe to avoid affecting the connection between the threaded pipe and the external HVAC pipe.

[0008] As a further solution of the utility model: the inflation and exhaust structure includes an air pipe passing through the central tube, the inner thread of the air pipe is connected with a plug, the diameter of the air pipe does not exceed half of the diameter of the central tube, and the central tube and the interior of the airbag are inflated by connecting the air pipe with an external air pump, so that the volume of the airbag expands and deforms.

[0009] As a further solution of the utility model: a groove is welded coaxially on the side of the trachea, the groove is in a circular shape, and a clamping block that fits the groove is fixed on one side of the plug. By adapting the clamping block to the groove, the air tightness of the connection between the plug and the trachea can be enhanced.

[0010] As a further solution of the utility model: a square protrusion is welded on one side of the hexagonal welding block, a center tube passes through the square protrusion, a cylindrical through hole is opened through the side of the square protrusion, and the square protrusion can adapt to a square force tool to drive the square protrusion and the threaded tube to rotate.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. The utility model connects an air pressure detection structure through the inside of the threaded pipe. The inflatable bag serves as a sensor of the air pressure detection structure, and can transmit the pressure in the threaded pipe through the center pipe. At the same time, the pressure intensity in the threaded pipe is indicated by the change of the air pressure intensity in the inflatable bag. By regularly observing the air pressure indication number, the use time and use status of the threaded pipe can be inferred through the use status of the inflatable bag, which is conducive to reducing the maintenance difficulty of the thread plugging structure and ensuring the air tightness of the HVAC pipeline.

[0013] 2. The utility model provides a rounded surface at the opening of one end of the threaded tube, which can reduce the degree of wear on the surface of the airbag body and prevent the opening of one end of the threaded tube from scratching the surface of the airbag body. The block that fixes the matching groove on one side of the plug can enhance the air tightness of the connection between the plug and the air pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural diagram of the utility model;

[0015] Figure 2 It is a partial exploded structural diagram of the utility model;

[0016] Figure 3 It is a partial structural diagram of the utility model.

[0017] In the figure: 1. threaded tube; 2. rounded surface; 3. blocking block; 4. center tube; 5. drainage tube; 6. air bag body; 7. plastic film; 8. pressure gauge; 9. hexagonal welding block; 10. square protrusion; 11. air pipe; 12. groove; 13. plug; 14. clamping block. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1-Figure 3 The utility model provides a technical solution: a thread plug structure at the end of a HVAC pipe, comprising a threaded pipe 1, which is threadedly connected to the HVAC pipe through the threads on its surface, and a blocking block 3 is integrally formed on the inner wall of the threaded pipe 1, which is used to block the internal channel of the threaded pipe 1, and a central tube 4 runs through the interior of the blocking block 3, and the central tube 4 serves as an air pressure detection channel. An inflatable and deformable air bag is fixed to one end of the central tube 4 through a plastic film 7 connected by gluing, and the air pressure intensity of the air bag is transmitted to a barometer 8 through the central tube 4, and the air bag comprises a drainage tube 5 and an air bag body 6, and the drainage tube 5 runs through the interior of the central tube 4 tangent to the axis.

[0020] A pressure gauge 8 is installed at the other end of the center tube 4 relative to the end where the inflatable bag is located. An inflation and exhaust structure is connected through the surface of the center tube 4. The inflation and exhaust structure can pump or exhaust the gas in the inflatable bag. When the gas inside the inflatable bag is discharged, the volume of the inflatable bag can be reduced, which is convenient for the connection of the threaded tube 1 with the external HVAC pipeline. The inflation and exhaust structure includes an air pipe 11 that penetrates the center tube 4. The air pipe 11 has a plug 13 connected to the inner thread. The diameter of the air pipe 11 does not exceed half of the diameter of the center tube 4. Through the connection of the air pipe 11 with an external air pump, the center tube 4 and the interior of the airbag body 6 are inflated, so that the volume of the airbag body 6 expands and deforms. A hexagonal welding block 9 is coaxially welded at one end of the threaded tube 1. The hexagonal welding block 9 can be used as a clamping end for rotating the threaded tube 1. A force transmission tool that is adapted to the hexagonal welding block 9, such as a wrench or pliers, is used to clamp the hexagonal welding block 9, and the threaded tube 1 can be further driven to rotate by rotating the hexagonal welding block 9.

[0021] Preferably, Figure 2 As shown, a rounded surface 2 is provided at an opening of one end of the threaded tube 1 , and the rounded surface 2 can reduce the degree of wear on the surface of the airbag body 6 .

[0022] Preferably, Figure 2 As shown, the length of the drainage tube 5 is equal to that of the central tube 4, the airbag body 6 is connected to the drainage tube 5 and is integrally formed, the pressure change in the airbag body 6 is transmitted to the barometer 8 through the central tube 4, and the change of air pressure at one end of the central tube 4 is detected by the barometer 8.

[0023] Preferably, Figure 2 As shown, the airbag body 6 is a hollow round cake-shaped flexible closed silicone membrane, and the maximum cross-section of the airbag body 6 does not exceed the maximum cross-section of the threaded tube 1 to avoid affecting the connection between the threaded tube 1 and the external HVAC pipeline.

[0024] Preferably, Figure 3 As shown, a groove 12 is welded coaxially on the side of the air pipe 11, and the groove 12 is in a circular shape. A block 14 that fits the groove 12 is fixed on one side of the plug 13. By adapting the block 14 to the groove 12, the air tightness of the connection between the plug 13 and the air pipe 11 can be enhanced.

[0025] Preferably, Figure 1 As shown, a square protrusion 10 is welded on one side of the hexagonal welding block 9, the center tube 4 passes through the square protrusion 10, and a cylindrical through hole is opened on the side of the square protrusion 10. The square protrusion 10 can adapt to a square force tool to drive the square protrusion 10 and the threaded tube 1 to rotate.

[0026] Working principle: When in use, most of the gas in the airbag body 6 is discharged to shrink the volume of the airbag body 6 to avoid affecting the air tightness of the connection between the threaded tube 1 and the external HVAC pipe. When the threaded tube 1 is connected to one end of the HVAC pipe, the plug 13 is opened and gas is introduced into the air pipe 11 through an air pump. The gas can be an inert gas or air. The gas enters the interior of the airbag body 6 through the central tube 4, causing the airbag body 6 to expand and deform. The expanded airbag body 6 can seal the opening at one end of the threaded tube 1, so that the pressure in the threaded tube 1 generates pressure on the airbag body 6, causing the airbag body 6 to deform, and the pressure change in the airbag body 6 is transmitted to the barometer 8 through the central tube 4. By observing the value of the barometer 8 and comparing it with the standard value, it is possible to quickly determine whether the airbag body 6 is leaking or damaged by aging, thereby determining the degree of wear of the connection between the threaded tube 1 and the external HVAC pipe and the maintenance and replacement cycle according to the degree of loss of the airbag body 6.

[0027] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A thread plug structure at the end of a HVAC pipe, comprising a threaded pipe (1), characterized in that: The inner wall of the threaded tube (1) is integrally formed with a block (3), the interior of the block (3) is penetrated by a center tube (4), one end of the center tube (4) is fixed with an inflatable and deformable air bag by means of a plastic film (7) connected by gluing, an air pressure gauge (8) is installed at the other end of the center tube (4) opposite to the end where the air bag is located, the surface of the center tube (4) is penetrated and connected with an inflation and exhaust structure, and one end of the threaded tube (1) is coaxially welded with a hexagonal welding block (9).

2. The plugging structure at the end of a HVAC pipe according to claim 1, characterized in that: A rounded surface (2) is provided at an opening at one end of the threaded tube (1).

3. The plugging structure at the end of a HVAC pipe according to claim 1, characterized in that: The inflatable bag comprises a drainage tube (5) and an air bag body (6); the drainage tube (5) coaxially and tangentially penetrates the interior of the central tube (4); the length of the drainage tube (5) is equal to the length of the central tube (4); the air bag body (6) is connected to the drainage tube (5) and is integrally formed.

4. The plugging structure at the end of a HVAC pipe according to claim 3, characterized in that: The airbag body (6) is a hollow, round, flexible, closed silicone membrane, and the maximum cross-section of the airbag body (6) does not exceed the maximum cross-section of the threaded tube (1).

5. The plugging structure at the end of a HVAC pipe according to claim 1, characterized in that: The inflation and exhaust structure comprises an air pipe (11) penetrating the central pipe (4), a plug (13) being connected to the internal thread of the air pipe (11), and a diameter of the air pipe (11) is no more than half of the diameter of the central pipe (4).

6. The plugging structure at the end of a HVAC pipe according to claim 5, characterized in that: A groove (12) is coaxially welded on the side of the air pipe (11), the groove (12) is in the shape of a circular ring, and a block (14) adapted to fit the groove (12) is fixed on one side of the plug (13).

7. The plugging structure at the end of a HVAC pipe according to claim 1, characterized in that: A square protrusion (10) is welded to one side of the hexagonal welding block (9), the center tube (4) passes through the square protrusion (10), and a cylindrical through hole is opened through the side of the square protrusion (10).

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