Spherical inner plug measuring hole suitable for positive pressure flue gas duct

Abstract

The invention relates to the technical field of positive pressure flue gas duct measuring holes, in particular to a spherical inner plug measuring hole applicable to a positive pressure flue gas duct, which comprises a measuring hole pipeline mounted on the positive pressure flue gas duct and communicated with the positive pressure flue gas duct; the sealing ball is installed at the smoke inlet end of the hole measuring pipeline, and the diameter of the sealing ball is not smaller than the inner diameter of the hole measuring pipeline; the flexible traction piece penetrates through the measuring hole pipeline, one end of the flexible traction piece is fixedly connected with the sealing ball, and the other end of the flexible traction piece extends out of the measuring hole pipeline; the sealing ball has a first state in which the sealing ball completely blocks the flue gas inlet of the measuring hole pipeline when the flexible traction piece is tensioned, and a second state in which the sealing ball is separated from the flue gas inlet of the measuring hole pipeline when the flexible traction piece is loosened. When the testing equipment is placed, the sealing ball is used for blocking smoke at the smoke inlet of the testing hole pipeline, the influence of positive pressure smoke on the installation direction and the installation position of the testing equipment can be avoided, and the damage of high-temperature harmful smoke to testing personnel can also be avoided.

Description

Technical Field

[0001] The invention relates to the technical field of positive pressure flue gas duct hole measurement, and in particular to a spherical inner plug hole measurement suitable for positive pressure flue gas duct. Background Art

[0002] In industrial production enterprises like coal-fired power plants and steel mills, flue gas is converted to positive-pressure flue gas after passing through the induced draft fan (IDF). The flue duct at the induced draft fan outlet typically connects to the desulfurization island inlet. This section of the flue is typically equipped with measuring holes for temperature, pressure, smoke concentration, and other parameters. Because the flue gas in this section of the flue is at positive pressure, the positive pressure increases closer to the IDF outlet. This positive-pressure flue gas poses a challenge to placing test instruments. Furthermore, prolonged inhalation of undesulfurized flue gas can be harmful to testers, resulting in tracheal and lung burns, and skin burns caused by high temperatures.

[0003] In the prior art, the hole measuring devices installed on the positive pressure flue are generally single-layer flange and plug type. When using this type of hole measuring device, the tester must first open the hole. Once the flange or plug is opened, the flue gas will gush out along the hole measuring pipe due to the positive pressure. At this time, if the test equipment is placed into the flue through the hole measuring, it will be subject to greater flue gas resistance. The tester will also face the harm of high-temperature flue gas that has not been desulfurized. After the tester insists on completing the placement of the test equipment, it is still necessary to find rags and other materials to block the gap between the hole measuring and the equipment. The tester will once again face the harm of high-temperature flue gas that has not been desulfurized for a long time. During the test process, there will be a situation where the tester does not block the gap tightly enough, causing the flue gas to leak again or the angle of the test equipment changes, resulting in inaccurate measurement data. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art that high-temperature harmful flue gas may cause harm to the tester when installing the test equipment in the positive-pressure flue gas duct measuring hole, thereby providing a spherical internal plug measuring hole suitable for positive-pressure flue gas duct.

[0005] In order to solve the above technical problems, the present invention provides a spherical inner plug measuring hole suitable for positive pressure flue gas duct, comprising:

[0006] A hole measuring pipe is installed on the positive pressure flue gas duct and is connected to the positive pressure flue gas duct;

[0007] The sealing ball is installed at the smoke inlet end of the borehole pipe. The diameter of the sealing ball should not be less than the inner diameter of the borehole pipe.

[0008] A flexible traction member is provided through the borehole measuring pipe, one end of the flexible traction member is fixedly connected to the sealing ball, and the other end extends outside the borehole measuring pipe;

[0009] The sealing ball has a first state in which the smoke inlet of the orifice measuring pipe is completely blocked when the flexible traction member is tightened, and a second state in which the sealing ball is separated from the smoke inlet of the orifice measuring pipe when the flexible traction member is relaxed.

[0010] Optionally, a winding device is further included, which is fixedly mounted on the outer wall of the hole measuring pipe or the outer wall of the positive pressure flue gas duct, and one end of the flexible traction member extending outside the hole measuring pipe is wound on the winding device.

[0011] Optionally, the winding device includes a mounting bracket and a winding roller, the winding roller is rotatably mounted on the mounting bracket, the flexible traction member is wound on the winding roller, and an operating handle is installed on the winding roller.

[0012] Optionally, a pipe orifice flange is provided at the smoke outlet end of the hole measuring pipe, and a sealing flange is detachably mounted on the pipe orifice flange.

[0013] Optionally, the pipe mouth flange and the sealing flange are connected by bolts.

[0014] Optionally, the flexible traction member is a steel wire.

[0015] Optionally, a through hole is provided on the borehole measuring pipe, the flexible traction member extends from the through hole to the outside of the borehole measuring pipe, and the through hole is sealed.

[0016] The technical solution of the present invention has the following advantages:

[0017] 1. The spherical inner plug measuring hole suitable for a positive-pressure flue gas duct provided by the present invention comprises: a measuring hole pipe, which is installed on the positive-pressure flue gas duct and is connected to the positive-pressure flue gas duct; a sealing ball, which is installed at the flue gas inlet end of the measuring hole pipe, and the diameter of the sealing ball is not less than the inner diameter of the measuring hole pipe; a flexible traction member, which is arranged through the measuring hole pipe, one end of the flexible traction member is fixedly connected to the sealing ball, and the other end extends to the outside of the measuring hole pipe; the sealing ball has a first state in which the flue gas inlet of the measuring hole pipe is completely blocked when the flexible traction member is tightened, and a second state in which the sealing ball is separated from the flue gas inlet of the measuring hole pipe when the flexible traction member is relaxed.

[0018] During normal operation of the positive pressure flue gas duct, the flexible traction member is in a tensioned state, so that the sealing ball completely blocks the flue gas inlet of the borehole pipe. When installing the sampling gun and the wind pipe test equipment inside the borehole pipe, place the required borehole measuring instruments and equipment into the borehole pipe, and lower the test equipment until it contacts the sealing ball. Then, select rags or other filling materials to block the gaps around the measurement and control equipment in the inner cavity of the borehole pipe. After fixing the test equipment so that it will not fall due to gravity and ensuring that the filling material is densely filled without gaps, loosen the flexible traction member so that the sealing ball flows into the flue with the flue gas and no longer blocks the borehole pipe. Due to the restraint of the flexible traction member, the sealing ball will not float away with the flue gas. Continue to lower the test equipment to the appropriate position and then conduct the test. If there is a small amount of flue gas leakage during the test, observe the leak location and then use filling materials to block it to ensure that the flue gas no longer leaks. After the test is complete, the test equipment is moved upward, withdrawing it from the flue into the borehole duct. The flexible traction member is tightened and fixed so that the sealing ball re-seals the flue gas inlet of the borehole duct. The test equipment and filling material are then removed in sequence, and the borehole duct is restored to its original state. When placing the test equipment, the sealing ball is used to block the flue gas at the flue gas inlet of the borehole duct. This prevents the positive pressure flue gas from affecting the installation direction and position of the test equipment, and protects the test personnel from being injured by the high-temperature and harmful flue gas.

[0019] 2. The spherical internal plug measuring hole for a positive-pressure flue gas duct provided by the present invention also includes a winding device fixedly mounted on the outer wall of the measuring hole pipe or the outer wall of the positive-pressure flue gas duct. The end of the flexible traction member extending outside the measuring hole pipe is wound around the winding device. The provision of the winding device facilitates the winding, storage, and securing of the flexible traction member outside the measuring hole pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 This is a schematic structural diagram of a spherical inner plug measuring hole suitable for a positive pressure flue gas duct provided in an embodiment of the present invention.

[0022] Explanation of the accompanying symbols: 1. Sealing flange; 2. Pipe mouth flange; 3. Hole measuring pipe; 4. Sealing ball; 5. Flexible traction member; 6. Mounting bracket; 7. Winding roller; 8. Operating handle; 9. Flue wall panel. DETAILED DESCRIPTION

[0023] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0024] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0026] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0027] Example

[0028] like Figure 1 The figure shows a spherical inner plug measuring hole suitable for positive pressure flue gas provided by this embodiment, including a measuring hole pipe 3, a sealing ball 4 and a steel wire as a flexible traction member 5. The measuring hole pipe 3 and the sealing ball 4 in this embodiment are both made of stainless steel, which is waterproof, rust-proof and smoke-corrosion-resistant. In order to reduce the weight of the sealing ball 4, the sealing ball 4 is set as a hollow stainless steel sphere in this embodiment. The diameter of the sealing ball 4 is slightly larger than the inner diameter of the measuring hole pipe 3 to ensure that the sealing ball 4 will not be pressed into the measuring hole pipe 3 by the positive pressure flue gas and get stuck. A steel wire fixing ring is provided at the outer top of the sphere of the sealing ball 4, and the steel wire is bound and installed on the fixing ring to ensure that the steel wire will not fall off. In some other embodiments, a buckle is fixedly welded on the top of the sealing ball 4, and another buckle is bound to the end of the steel wire, and the two buckle structures are clamped and fixedly connected.

[0029] The borehole detection pipe 3 is mounted on the upper sidewall of the positive-pressure flue gas duct and communicates with the latter. A sealing ball 4 is installed at the flue gas inlet of the borehole detection pipe 3. The diameter of the sealing ball 4 is no smaller than the inner diameter of the borehole detection pipe 3. A flexible traction member 5 extends through the borehole detection pipe 3. One end of the flexible traction member is fixedly connected to the sealing ball 4, and the other end extends outside the borehole detection pipe 3. The sealing ball 4 has a first state in which the flexible traction member 5 completely blocks the flue gas inlet of the borehole detection pipe 3 when the flexible traction member 5 is tightened, and a second state in which the sealing ball 4 is separated from the flue gas inlet of the borehole detection pipe 3 when the flexible traction member 5 is relaxed.

[0030] In order to facilitate the control of the tensioning, loosening, and storage and fixing of the flexible traction member 5, a winding device is fixedly installed on the outer wall of the borehole measuring pipe 3, and the end of the flexible traction member 5 extending outside the borehole measuring pipe 3 is wound and installed on the winding device. In this embodiment, the winding device includes a mounting bracket 6 and a winding roller 7, the mounting bracket 6 is fixedly installed on the borehole measuring pipe 3, the winding roller 7 is rotatably installed on the mounting bracket 6, the flexible traction member 5 is wound and installed on the winding roller 7, and an operating handle 8 is installed on the winding roller 7. When fixing the flexible traction member 5, the flexible traction member 5 can be directly bound to the borehole measuring pipe 3, or the operating handle 8 can be directly limited to the mounting bracket 6 by using a limiting structure such as a limiting plate and a limiting column, and the limiting structure is installed on the mounting bracket 6 by spring expansion and contraction. In some other embodiments, the winding device is fixedly installed on the outer wall of the positive pressure flue.

[0031] In order to seal the borehole pipe 3 during routine operation of the positive-pressure flue, a nozzle flange 2 is provided at the flue gas outlet end of the borehole pipe 3, and a sealing flange 1 is detachably mounted on the nozzle flange 2. The nozzle flange 2 and the sealing flange 1 are fixedly connected by bolts. A through-hole is provided on the borehole pipe 3, and a flexible traction member 5 extends from the through-hole to the outside of the borehole pipe 3. The through-hole is sealed, and the steel wire serving as the flexible traction member 5 only slides in cooperation with the through-hole. Specifically, the borehole pipe 3 is welded and fixed to the flue wall panel 9. A through-hole is provided on the borehole pipe 3, and a silicone tube is installed on the through-hole to seal and reduce wear on the steel wire.

[0032] To install the borehole measurement device, weld the borehole measurement pipe 3 to the flue wall 9 of the positive-pressure flue. Leave a hole in the flue wall 9 with the same inner diameter as the borehole measurement pipe 3 to serve as the test hole. Pass the steel wire wrapped around the winding device through the through-hole and into the test hole. Securely secure the sealing ball 4 and the steel wire inside the positive-pressure flue. Then, bolt the sealing flange 1 to the nozzle flange 2.

[0033] When it is necessary to use the test equipment under the test hole for testing, open the bolts, remove the sealing flange 1, and separate it from the pipe mouth flange 2. Place the required sampling gun, wind measuring tube and other instruments and equipment into the measuring hole pipe 3. After the top of the equipment touches the sealing ball 4, select rags and other filling materials to block the gap between the measuring hole and the equipment, and fix the test equipment so that it will not move and there is no gap. Loosen the steel wire on the winding device so that the sealing ball 4 can move downward. Push the test equipment downward to force open the sealing ball 4. The sealing ball 4 will flow into the flue with the positive pressure flue gas and will no longer block the measuring hole. Due to the restraint of the steel wire, the sealing ball 4 will not float away with the flue gas. Continue to place the test equipment down to the appropriate position and observe. If there is a little smoke leakage, observe its position and then use filling materials such as broken steps to block it to ensure that the smoke no longer leaks.

[0034] When use is complete, shake the operating handle 8 to wind the wire around the winding device. The sealing ball 4 at the end of the wire is lifted to the lower end of the test hole pipe 3, blocking the test hole. Due to the positive pressure of the flue gas, the sealing ball 4 fits tightly against the test hole, preventing any leakage. The wire is now locked in the winding device. After removing the sampling gun, wind pipe, and other equipment, return the sealing flange 1 and the nozzle flange 2 to their original positions and secure them with bolts.

[0035] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A spherical inner plug measuring hole suitable for positive pressure flue gas duct, characterized in that: include: A hole measuring pipe (3) is installed on the positive pressure flue gas duct and is in communication with the positive pressure flue gas duct; A sealing ball (4) is installed at the smoke inlet end of the hole measuring pipe (3), and the diameter of the sealing ball (4) is not less than the inner diameter of the hole measuring pipe (3); A flexible traction member (5) is provided through the borehole measuring pipe (3), one end of the flexible traction member is fixedly connected to the sealing ball (4), and the other end extends to the outside of the borehole measuring pipe (3); The sealing ball (4) has a first state in which the smoke inlet of the orifice measuring pipe (3) is completely blocked when the flexible traction member (5) is tightened, and a second state in which the sealing ball (4) is separated from the smoke inlet of the orifice measuring pipe (3) when the flexible traction member (5) is relaxed.

2. The spherical inner plug measuring hole suitable for positive pressure flue gas duct according to claim 1 is characterized in that: It also includes a winding device fixedly mounted on the outer wall of the hole measuring pipe (3) or the outer wall of the positive pressure flue gas duct, and one end of the flexible traction member (5) extending outside the hole measuring pipe (3) is wound and mounted on the winding device.

3. The spherical inner plug measuring hole suitable for positive pressure flue gas duct according to claim 2 is characterized in that: The winding device comprises a mounting bracket (6) and a winding roller (7); the winding roller (7) is rotatably mounted on the mounting bracket (6); the flexible traction member (5) is wound on the winding roller (7); and an operating handle (8) is mounted on the winding roller (7).

4. The spherical inner plug measuring hole suitable for positive pressure flue gas duct according to any one of claims 1 to 3, characterized in that: The smoke outlet end of the hole measuring pipe (3) is provided with a pipe orifice flange (2), and a sealing flange (1) is detachably mounted on the pipe orifice flange (2).

5. The spherical inner plug measuring hole suitable for positive pressure flue gas duct according to claim 4 is characterized in that: The pipe mouth flange (2) and the sealing flange (1) are connected via bolts.

6. The spherical inner plug measuring hole suitable for positive pressure flue gas duct according to any one of claims 1 to 3, characterized in that: The flexible traction member (5) is a steel wire.

7. The spherical inner plug measuring hole suitable for positive pressure flue gas duct according to any one of claims 1 to 3, characterized in that: The borehole measuring pipe (3) is provided with a through hole, the flexible traction member (5) extends from the through hole to the outside of the borehole measuring pipe (3), and the through hole is sealed.

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