Double-pipeline vertical pressure tapping device for nodular cast iron pipe production

Abstract

The utility model discloses a double-pipeline vertical pressure tapping device for nodular cast iron pipe production, which comprises a valve, a mounting pipe is mounted below the valve, a pressure tapping pipe is mounted above the valve, a dredging pipe is arranged on one side of the pressure tapping pipe, an anti-overflow mechanism is arranged below the inside of the dredging pipe, and a pressure tapping valve is arranged in the anti-overflow mechanism. The anti-overflow mechanism comprises a fixing plate, a round hole is formed in the middle of the upper end face of the fixing plate in a penetrating mode, a bottom plate is connected to the lower portion of the fixing plate through a spring B, a limiting column is installed in the middle of the upper end face of the bottom plate, and the outer surface of the limiting column is sleeved with a rubber ring. By arranging the anti-overflow mechanism, coal gas can be prevented from overflowing, dredging of the pressure tapping pipe is not affected, operation is convenient, by arranging the arc turning part, pressure tapping coal gas is made to circulate smoothly and not prone to blockage, meanwhile, communication is achieved through front and back reducing, and cleaning is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure taking of gas pipelines rich in moisture and dust, in particular to a double-pipeline vertical pressure taking device used for the production of ductile iron pipes. Background Art

[0002] In the ironmaking stage of the previous process of pipeline manufacturing, there are a large number of gas pipelines rich in moisture and dust due to process requirements, especially the raw gas and clean gas pipelines of blast furnace gas. To detect the pressure and flow of this pipeline, it is necessary to use a pressure pipe to take the pressure to the pressure and flow transmitter. At present, short-tube pressure measurement is generally adopted. Short-tube pressure measurement: a short tube of about 20 cm is welded on the opening of the coal powder pipeline, and the pressure transmitter is connected through the thread on the short tube. Because there is dust in the gas pipeline that is not fully settled or filtered, and there is also moisture generated by condensation in the pipeline due to the drop in medium temperature. When taking pressure to the pressure transmitter through the pressure pipe, dust and moisture are easy to condense to produce a mixture to block the pressure pipe, especially the pressure pipe opening welded on the main pipeline is particularly easy to block. Maintenance or production personnel are often required to clean and dredge the blocked pipeline.

[0003] The prior art CN204953461U pressure-taking pipe anti-blocking device is provided with an anti-blocking pipe, a ball valve, a first valve structure, a second valve structure, an insulation structure, a pass needle and a steam back-blowing pipe. The vertical pressure-taking pipe is arranged in the anti-blocking pipe, the pass needle is fixed in the vertical pressure-taking pipe through the ball valve, and the steam back-blowing pipe is radially connected with the horizontal section pressure-taking pipe through the first valve structure. When the pressure-taking pipe is blocked, the ball valve is first opened, and the pass needle through the ball valve is used to mechanically clear the vertical pressure-taking pipe, and then the ball valve is closed, and then the second valve structure is closed, and the first valve structure is opened. At this time, high-temperature and high-pressure steam / inert gas enters the horizontal pressure-taking pipe and the vertical pressure-taking pipe through the steam back-blowing pipe to back-blow and clear the blocked part, and finally the first valve structure is closed and the second valve structure is opened.

[0004] However, when the above device is in use, each time a blockage occurs, it is necessary to close the second valve structure and open the first valve structure, which is cumbersome to operate. In addition, the right-angle pressure-taking pipe with a dredging port used on a medium pipeline that is easily clogged has two defects: one is that the right-angle turn is particularly prone to blockage due to a sudden change in flow velocity, and the other is that the pipeline after the right-angle turn cannot be cleaned after being blocked. Therefore, it does not meet the existing needs. In this regard, we propose a circular arc turning double-pipeline vertical pressure-taking device with a dredging function. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In view of the shortcomings of the prior art, the utility model provides a double-pipe vertical pressure-taking device for the production of ductile iron pipes to solve the problems raised in the above-mentioned background technology. However, when the above-mentioned device is in use, it is necessary to close the second valve structure and open the first valve structure each time a blockage occurs, which is cumbersome to operate. In addition, the right-angle pressure-taking pipe with a dredging port used on a medium pipeline that is easily blocked has two defects: one is that the right-angle turn is particularly prone to blockage due to the sudden change in flow velocity, and the other is that the pipeline after the right-angle turn cannot be cleaned after being blocked.

[0007] (II) Technical solution

[0008] To achieve the above purpose, the utility model is implemented by the following technical scheme: a double-pipe vertical pressure-taking device for ductile iron pipe production, comprising a valve, a mounting pipe is installed below the valve, a pressure-taking pipe is installed above the valve, a dredging pipe is arranged on one side of the pressure-taking pipe, an anti-overflow mechanism is arranged below the inside of the dredging pipe, the anti-overflow mechanism comprises a fixing plate, a circular hole is arranged through the middle of the upper end surface of the fixing plate, a bottom plate is connected to the fixing plate below through a spring B, a limiting column is installed in the middle of the upper end surface of the bottom plate, and a rubber ring is sleeved on the outer surface of the limiting column.

[0009] Preferably, vertical grooves are provided on both sides below the inner wall of the dredging pipe, a slide plate is installed inside the vertical groove through a spring A, and the outer surface of the slide plate is fixedly connected to the outer surface of the bottom plate.

[0010] Preferably, a circular arc turning portion is provided at the connection between the dredging pipe and the pressure taking pipe.

[0011] Preferably, the diameters of the aperture A set inside the installation tube and the aperture B set inside the pressure taking tube are both smaller than the tube diameter set inside the valve.

[0012] Preferably, an external thread is provided above the outer surface of the pressure taking tube.

[0013] (III) Beneficial effects

[0014] The utility model provides a double-pipeline vertical pressure-taking device used for the production of ductile iron pipes.

[0015] It has the following beneficial effects:

[0016] 1. The utility model is provided with an overflow prevention mechanism. When in normal use, gas enters the pressure-taking pipe through the installation pipe and the valve, and a part of the gas enters the dredging pipe. The gas pushes the bottom plate upward, so that the connection between the limit column and the circular hole is tighter, which can prevent gas from overflowing from the dredging pipe. When the pressure-taking pipe needs to be dredged, high-temperature and high-pressure steam or inert gas is input into the dredging pipe. The high-temperature and high-pressure steam or inert gas pushes the limit column downward. At this time, the spring A is compressed, the spring B is stretched, the slide plate moves downward on the inner side of the vertical groove, the limit column leaves the inner side of the circular hole, and the high-temperature and high-pressure steam or inert gas can enter the pressure-taking pipe through the gap between the circular hole, the bottom plate and the inner wall of the dredging pipe to dredge. The utility model can prevent gas from overflowing by providing an overflow prevention mechanism, and does not affect the dredging of the pressure-taking pipe, and is easy to operate.

[0017] 2. The utility model is provided with an arc turning part to avoid sudden changes in flow rate, so that the pressure gas can flow smoothly and is not easy to be blocked. By using a valve with a larger diameter than the installation pipe and the pressure pipe, the connection is achieved through the front and rear diameter changes, which not only improves the valve core that is most prone to blockage, but also makes it easier for the cleaning rod to pass through, making cleaning convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a straight-through pressure-taking pipe in the prior art;

[0019] Figure 2 It is a structural schematic diagram of a right-angle pressure-taking pipe with a dredging port in the prior art;

[0020] Figure 3 It is a general schematic diagram of the overall structure of the utility model;

[0021] Figure 4 It is a main cross-sectional view of the utility model as a whole;

[0022] Figure 5 It is a partial structural schematic diagram of the overflow prevention mechanism of the utility model;

[0023] Figure 6 It is a schematic diagram of the local structure of the pipe diameter of the utility model.

[0024] In the figure: 1. installation pipe; 2. valve; 3. pressure taking pipe; 4. dredging pipe; 5. arc turning part; 6. overflow prevention mechanism; 601. bottom plate; 602. limit column; 603. rubber ring; 604. spring A; 605. vertical groove; 606. slide plate; 607. spring B; 608. fixing plate; 609. round hole; 7. external thread; 8. aperture A; 9. pipe diameter; 10. aperture B. DETAILED DESCRIPTION

[0025] 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.

[0026] See also Figures 3 to 6 The utility model provides an embodiment: a double-pipe vertical pressure-taking device for ductile iron pipe production. It includes a valve 2, a mounting pipe 1 is installed below the valve 2, a pressure-taking pipe 3 is installed above the valve 2, a dredging pipe 4 is arranged on one side of the pressure-taking pipe 3, and an anti-overflow mechanism 6 is arranged below the inside of the dredging pipe 4. The anti-overflow mechanism 6 includes a fixing plate 608, a circular hole 609 is arranged through the middle of the upper end surface of the fixing plate 608, a bottom plate 601 is connected to the bottom of the fixing plate 608 through a spring B607, a limiting column 602 is installed in the middle of the upper end surface of the bottom plate 601, and a rubber ring 603 is sleeved on the outer surface of the limiting column 602.

[0027] Furthermore, vertical grooves 605 are provided on both sides below the inner wall of the dredging pipe 4 , and a slide plate 606 is installed inside the vertical groove 605 through a spring A604 , and the outer surface of the slide plate 606 is fixedly connected to the outer surface of the bottom plate 601 .

[0028] By adopting the above technical solution, the stability of the bottom plate 601 is improved, the stability of the limiting column 602 inside the circular hole 609 is ensured, and the stability of the bottom plate 601 moving up and down is improved.

[0029] Furthermore, a circular arc turning portion 5 is provided at the connection between the dredging pipe 4 and the pressure taking pipe 3 .

[0030] By adopting the above technical solution and using the arc turning part 5, the pressurized gas can flow smoothly and is not easily blocked.

[0031] Furthermore, the diameters of the aperture A8 set inside the installation pipe 1 and the aperture B10 set inside the pressure taking pipe 3 are both smaller than the pipe diameter 9 set inside the valve 2 .

[0032] By adopting the above technical solution, a valve 2 with a larger diameter than the installation pipe 1 and the pressure taking pipe 3 is used, and the connection is achieved by changing the diameter of the front and rear parts, which not only improves the valve core that is most prone to blockage, but also makes it easier for the cleaning rod to pass through.

[0033] Furthermore, an external thread 7 is provided above the outer surface of the pressure taking tube 3 .

[0034] Working principle: When the circular arc turning double-pipe vertical pressure-taking device with dredging function for the production of ductile iron pipes is in use, an overflow prevention mechanism 6 is provided. When in normal use, gas enters the pressure-taking pipe 3 through the installation pipe 1 and the valve 2, and part of the gas enters the dredging pipe 4. The gas pushes the bottom plate 601 upward, so that the limit column 602 is more tightly connected to the circular hole 609, which can prevent the gas from overflowing from the dredging pipe 4. When the pressure-taking pipe 3 needs to be dredged, high-temperature and high-pressure steam or inert gas is input into the dredging pipe 4. The high-temperature and high-pressure steam or inert gas pushes the limit column 602 downward. At this time, the spring A604 is compressed, the spring B607 is stretched, and the slide plate 606 moves downward on the inner side of the vertical groove 605. The limit column 602 Leaving the inner side of the circular hole 609, high-temperature and high-pressure steam or inert gas can enter the pressure-taking pipe 3 through the gap between the circular hole 609, the bottom plate 601 and the inner wall of the dredging pipe 4 to dredge the pipe. By providing an arc turning portion 5, a sudden change in flow velocity can be avoided, so that the pressure-taking gas can flow smoothly and is not easily blocked. By using a valve 2 that is one level larger in diameter than the installation pipe 1 and the pressure-taking pipe 3, communication is achieved through front and rear diameter changes, which not only improves the valve core that is most prone to blockage, but also makes it easier for cleaning rods to pass through, making cleaning easier. The utility model can prevent gas overflow by providing an anti-overflow mechanism 6 without affecting the dredging of the pressure-taking pipe 3, and is easy to operate. By providing an arc turning portion 5, the pressure-taking gas can flow smoothly and is not easily blocked. At the same time, communication is achieved through front and rear diameter changes, making cleaning easier.

[0035] In summary, the utility model is provided with an overflow prevention mechanism. When in normal use, gas enters the pressure taking pipe through the installation pipe and the valve, and a part of the gas enters the dredging pipe. The gas pushes the bottom plate upward, so that the connection between the limit column and the circular hole is tighter, which can prevent gas from overflowing from the dredging pipe. When the pressure taking pipe needs to be dredged, high-temperature and high-pressure steam or inert gas is input into the dredging pipe. The high-temperature and high-pressure steam or inert gas pushes the limit column downward. At this time, the spring A is compressed, the spring B is stretched, the slide plate moves downward on the inner side of the vertical groove, the limit column leaves the inner side of the circular hole, and the high-temperature and high-pressure steam or inert gas can enter the pressure taking pipe through the gap between the circular hole, the bottom plate and the inner wall of the dredging pipe to dredge. The utility model can prevent gas from overflowing by providing an overflow prevention mechanism without affecting the dredging of the pressure taking pipe, and is easy to operate.

[0036] The utility model is provided with an arc turning portion to avoid sudden changes in flow velocity, so that the pressurized gas can flow smoothly and is not easy to be blocked. By using a valve with a larger diameter than the installation pipe and the pressure pipe, the connection is achieved through the front and rear diameter changes, which not only improves the valve core that is most prone to blockage, but also makes it easier for the cleaning rod to pass through, thereby facilitating cleaning.

[0037] 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.

[0038] 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 double-pipe vertical pressure-taking device for the production of ductile iron pipes, including a valve (2), characterized in that: A mounting tube (1) is installed below the valve (2), a pressure-taking tube (3) is installed above the valve (2), a dredging tube (4) is provided on one side of the pressure-taking tube (3), an anti-overflow mechanism (6) is provided below the inside of the dredging tube (4), and the anti-overflow mechanism (6) comprises a fixing plate (608), a circular hole (609) is provided through the middle of the upper end surface of the fixing plate (608), a bottom plate (601) is connected below the fixing plate (608) via a spring B (607), a limiting column (602) is installed in the middle of the upper end surface of the bottom plate (601), and a rubber ring (603) is sleeved on the outer surface of the limiting column (602).

2. A double-pipeline vertical pressure-taking device for ductile iron pipe production according to claim 1, characterized in that: Vertical grooves (605) are provided on both sides below the inner wall of the dredging pipe (4), and a slide plate (606) is installed inside the vertical groove (605) via a spring A (604), and the outer surface of the slide plate (606) is fixedly connected to the outer surface of the bottom plate (601).

3. A double-pipeline vertical pressure-taking device for ductile iron pipe production according to claim 1, characterized in that: A circular arc turning portion (5) is provided at the connection between the dredging pipe (4) and the pressure taking pipe (3).

4. A double-pipeline vertical pressure-taking device for ductile iron pipe production according to claim 1, characterized in that: The diameters of the aperture A (8) provided inside the installation tube (1) and the aperture B (10) provided inside the pressure-taking tube (3) are both smaller than the tube diameter (9) provided inside the valve (2).

5. A double-pipeline vertical pressure-taking device for ductile iron pipe production according to claim 1, characterized in that: An external thread (7) is provided above the outer surface of the pressure taking pipe (3).

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