An online unblocking device for power plant circulating water pressure measuring gauge pipes

Abstract

This utility model discloses an online unblocking device for pressure measuring gauge pipes in power plant circulating water systems, relating to the field of industrial equipment maintenance technology. It includes a manual pressure pump for generating high-pressure fluid; a high-pressure connecting hose, one end of which is quickly connected to the output pipe of the manual pressure pump, and the other end connected to a needle valve or a pressure measuring gauge bend; and a pressure monitoring gauge, installed on the manual pressure pump, for real-time monitoring of the applied pressure during the unblocking process. This utility model enables online unblocking of pressure measuring gauge pipes and needle valves while the power plant circulating water system is operating normally, without interrupting production, and without requiring shutdown or disconnection of related equipment. It solves the pain point of traditional methods that require system shutdown and production stoppage.

Description

Technical Field

[0001] This utility model relates to the field of industrial equipment maintenance technology, and more specifically to an online unblocking device for power plant circulating water pressure measuring gauge pipes. Background Technology

[0002] Thermal power plants consume large quantities of circulating cooling water, primarily sourced from surface water and municipal wastewater. This water contains suspended solids (such as silt and algae), organic matter, and other pollutants. Despite various water treatment measures to prevent pipe scaling and microbial growth, remove suspended solids and impurities, and reduce turbidity, the complex water quality and varying operating conditions, coupled with the abundant nutrients in the circulating cooling water, make it prone to microbial growth, forming biological slime that clogs pipes. Scale buildup persists in the equipment of the circulating cooling water system. Due to the large flow rate and low velocity of the circulating water, measuring instruments are easily clogged by sludge, which accumulates over time to form hard scale, rendering the measuring devices ineffective, disrupting monitoring functions, and impacting the safe operation of the equipment.

[0003] Therefore, it is necessary to propose an online unblocking device for power plant circulating water pressure measuring gauge pipes to solve the above problems. Utility Model Content

[0004] The purpose of this utility model is to solve the problems in the existing technology that when the pressure measuring instrument pipe and related isolation valve of power plant circulating water are blocked, it is impossible to handle them online, requiring the system to be shut down or disconnected, and the maintenance and operation are complicated and easy to cause secondary damage.

[0005] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0006] An online unblocking device for power plant circulating water pressure measuring gauge pipes includes:

[0007] Manual pressure pumps are used to generate high-pressure fluids;

[0008] The high-pressure connecting hose has one end that can be quickly connected to the output pipe of the manual pressure pump, and the other end that can be connected to the union needle valve or the bend of the pressure gauge.

[0009] Pressure monitoring gauges are installed on the manual pressure pump to monitor the applied pressure in real time during the unblocking process.

[0010] Furthermore, the high-pressure connecting hose is fixedly connected to an installation tube that is inserted into the outside of the output tube, and a sealing gasket is fixedly connected to the end of the output tube away from the manual pressure pump.

[0011] Furthermore, a limiting frame is fixedly connected to the outer side of the output pipe, and an arc-shaped extension plate is fixedly connected to the end of the mounting pipe away from the high-pressure connecting hose, forming a space between the limiting frame and the output pipe for the arc-shaped extension plate to be inserted.

[0012] Furthermore, a ring is rotatably connected to the outer side of the output tube, and a connecting rod is fixedly connected to the side of the ring facing the mounting tube. An arc-shaped rod is fixedly connected to the end of the connecting rod away from the ring, and an arc-shaped through hole for the arc-shaped rod to be inserted is opened at the end of the arc-shaped extension plate away from the mounting tube.

[0013] Furthermore, a limiting block is fixedly connected to the output pipe on the side of the arc-shaped extension plate away from the connecting rod, and the limiting block fits against the side of the arc-shaped rod away from the ring.

[0014] Furthermore, the end of the high-pressure connecting hose furthest from the manual pressure pump is used to install adapter assemblies of different specifications to adapt to the interface of the union needle valve or the pressure gauge bend.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. This utility model enables online unblocking of pressure measuring gauges and needle valves without interrupting production or requiring shutdown or disconnection of related equipment in a power plant's circulating water system. It solves the problem of requiring system shutdown and production stoppage in traditional methods.

[0017] 2. This utility model enables quick assembly and disassembly of the high-pressure connecting hose through a quick-release connection between the high-pressure connecting hose and the manual pressure pump. Attached Figure Description

[0018] Figure 1 This is a front view schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a three-dimensional schematic diagram of the connection structure between the mounting pipe and the output pipe in this utility model.

[0020] Figure 3 This is a cross-sectional schematic diagram of the connection structure between the mounting pipe and the output pipe in this utility model.

[0021] Figure 4 This is a schematic diagram of the bend in the pressure measuring gauge of the unblocking device in this utility model.

[0022] Figure 5 This is a schematic diagram of the unblocking device for unblocking needle valves in this utility model.

[0023] Reference numerals: 1. Manual pressure pump; 2. High-pressure connecting hose; 3. Output pipe; 4. Ring; 5. Connecting rod; 6. Arc rod; 7. Limiting block; 8. Limiting frame; 9. Mounting pipe; 10. Arc extension plate; 11. Sealing gasket. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1 to 5 The present invention discloses an online unblocking device for a power plant circulating water pressure measuring instrument pipe, which mainly includes a manual pressure pump 1, a high-pressure connecting hose 2, and various specifications of adapter assemblies, not all of which are shown in the figure, but are connected to the end of the high-pressure connecting hose 2 away from the manual pressure pump 1. The manual pressure pump 1 is equipped with a pressure monitoring gauge for real-time monitoring of the pump body's output pressure.

[0026] The manual pressure pump 1 is the core component for generating high-pressure fluid. Its pressure range is set between 1.6 MPa and 6 MPa, which can meet the unblocking requirements of the pressure measuring gauge pipes in the power plant's circulating water system. The output end of the manual pressure pump 1 is connected to an output pipe 3.

[0027] One end of the high-pressure connecting hose 2 is connected to the output pipe 3 of the manual pressure pump 1 via a quick-release structure. Specifically, an installation tube 9 is fixedly connected to this end of the high-pressure connecting hose 2. The installation tube 9 is designed to be inserted into the outside of the output pipe 3. To ensure a tight seal, a sealing gasket 11 is fixedly connected to the end of the output pipe 3 away from the manual pressure pump 1. When the installation tube 9 is fitted onto the output pipe 3, the sealing gasket 11 provides a reliable seal.

[0028] To achieve quick insertion and reliable positioning, a limiting frame 8 is fixedly connected to the outer side of the output pipe 3. An arc-shaped extension plate 10 is fixedly connected to the end of the mounting pipe 9 away from the high-pressure connecting hose 2. When the mounting pipe 9 is sleeved on the output pipe 3, the arc-shaped extension plate 10 can be inserted into the specific space formed between the limiting frame 8 and the output pipe 3, thereby achieving initial positioning.

[0029] To further secure the connection and prevent it from disengaging under high pressure, a ring 4 is rotatably connected to the outer side of the output tube 3. A connecting rod 5 is fixedly connected to the side of the ring 4 facing the mounting tube 9, and an arc-shaped rod 6 is fixedly connected to the end of the connecting rod 5 away from the ring 4. An arc-shaped through hole for inserting the arc-shaped rod 6 is provided at the end of the arc-shaped extension plate 10 away from the mounting tube 9. After the mounting tube 9 is inserted into place, the operator can rotate the ring 4, which drives the arc-shaped rod 6 to rotate through the connecting rod 5 and pass through the arc-shaped through hole on the arc-shaped extension plate 10, thereby locking the mounting tube 9 onto the output tube 3. At this time, the mounting tube 9 will compress the sealing gasket 11.

[0030] To prevent deformation between the connecting rod 5 and the arc-shaped rod 6, a limiting block 7 is fixedly connected to the output pipe 3 on the side of the arc-shaped extension plate 10 away from the connecting rod 5. When the arc-shaped rod 6 passes through the arc-shaped through hole and locks in place, the limiting block 7 will fit against the side of the arc-shaped rod 6 away from the ring 4, preventing the arc-shaped extension plate 10 from moving the arc-shaped rod 6 under the action of the rebound force of the sealing gasket 11, thus limiting the arc-shaped rod 6 and ensuring the reliability of the connection.

[0031] The other end of the high-pressure connecting hose 2 is designed to connect to an interface for various sizes of adapter assemblies. These adapter assemblies include various sizes of external thread adapters to adapt to pressure gauge tube interfaces of different sizes and thread types, such as G1 / 2, M20x1.5, M27x2, etc., as well as straight-through adapters. Through these adapters, the high-pressure connecting hose 2 can be flexibly connected to a union needle valve or pressure gauge bend, achieving a tight connection with the component being unclogged.

[0032] The pressure monitoring gauge is directly mounted on the manual pressurization pump 1, with a range of 0 to 25 MPa, sufficient to cover the instantaneous high pressure that may occur during the unblocking process. This gauge is used to monitor the pressure applied by the manual pressurization pump 1 in real time throughout the unblocking process, providing operators with intuitive pressure feedback, thereby enabling precise control of the pressurization process and ensuring operational safety and unblocking effectiveness.

[0033] Scenario 1: Unblocking the bend inlet of a pressure gauge, combined with... Figure 4 As shown.

[0034] This scenario applies when the pressure gauge itself is functioning normally, but the bend connecting to the gauge is clogged due to internal deposits of silt, algae, or biological slime. The core idea is to use high pressure to backflush from the outside of the gauge tube inwards, flushing the blockage back into the main pipe and restoring the bend's flow.

[0035] The specific operating steps are as follows:

[0036] 1. Preparations and safety confirmation:

[0037] Confirm that the isolation needle valve connected to the pressure gauge pipe to be cleared is in the closed position.

[0038] Prepare this unblocking device and check that all components are complete and in good working order. Ensure that there is sufficient clean water in the manual pressure pump 1 as the working medium.

[0039] Operators wear appropriate personal protective equipment.

[0040] 2. Disassemble the pressure gauge and connect the unblocking device:

[0041] Carefully unscrew the pressure gauge connected to the bend in the pressure gauge tube.

[0042] Select the most suitable adapter from the adapter assembly based on the thread type and size of the gauge pipe interface.

[0043] Connect the selected adapter to the end of the high-pressure connection hose 2 that is furthest from the manual pressure pump 1.

[0044] Make a quick-release connection between one end of the high-pressure connecting hose 2 with the installation tube 9 and the output tube 3 of the manual pressure pump 1: Fit the installation tube 9 onto the output tube 3, insert the arc-shaped extension plate 10 into the space between the limiting frame 8 and the output tube 3, and then rotate the ring 4 to allow the arc-shaped rod 6 to pass through the arc-shaped through hole and be locked by the limiting block 7. Ensure the connection is secure and sealed.

[0045] Connect the assembled adapter to the other end of the high-pressure connecting hose 2, and carefully screw it into the end of the pressure gauge bend to ensure a sealed high-pressure channel is formed.

[0046] 3. Perform high-pressure flushing to clear blockages:

[0047] After confirming that the unblocking device is securely connected and properly sealed, slowly and steadily open the needle valve of the union joint connected to the bend of the pressure gauge.

[0048] Operate the manual pressure pump 1 to apply pressure slowly and steadily. During the pressurization process, closely monitor the readings of the pressure gauges on the manual pressure pump 1.

[0049] Observe pressure changes and unblocking effect: When the pressure increases to a certain value, if there is a blockage in the bend, the pressure may stagnate at a high value, or as the blockage loosens, the reading of the pressure monitoring meter will suddenly drop, which usually indicates that the blockage has been broken and the high-pressure water flow will push the blockage back to the main pipe.

[0050] After the blockage is broken, the pressure can be maintained for a period of time, or several small-amplitude pressurization and depressurization cycles can be performed to ensure that the residual impurities in the gauge tube are thoroughly flushed out.

[0051] 4. Depressurization and dismantling:

[0052] After the blockage is cleared, the pressure inside the device is slowly released through the pressure relief valve of the manual pressure pump 1, so that the reading of the pressure monitoring gauge gradually drops to zero.

[0053] After the internal pressure of the device is completely released, slowly close the isolation needle valve connected to the measuring instrument tube.

[0054] Carefully unscrew the connection between the drain cleaner and the pressure gauge bend. Disconnect the quick-release connection between the high-pressure hose 2 and the manual pressure pump 1, and properly clean and store all components.

[0055] 5. Final verification:

[0056] Inspect the connecting threads and sealing surfaces of the pressure gauge. Once confirmed to be undamaged, reinstall it onto the end of the gauge tube. Ensure it is properly tightened and check for a tight seal.

[0057] Slowly open the isolation needle valve and observe the pressure gauge reading. If the pressure gauge accurately displays the actual working pressure of the main pipeline and the reading is stable, it indicates that the blockage has been successfully cleared and the pressure measurement function has returned to normal.

[0058] Scenario 2: Unblocking the valve core of an isolation needle valve, combined with... Figure 5 As shown.

[0059] This scenario applies to situations where the valve core or valve chamber inside the isolation needle valve connected to the front end of the pressure gauge tube becomes blocked.

[0060] The specific operating steps are as follows:

[0061] 1. Preparations and safety confirmation:

[0062] Similar to Scenario 1, and with special confirmation that the pressure before and after the valve, especially on the main pipeline side, has been effectively isolated to ensure safety when disassembling the valve core.

[0063] Record the readings of the pressure gauge connected to the isolation needle valve; it will typically show zero pressure or abnormally low pressure.

[0064] 2. Disassemble the pressure gauge and the isolation needle valve core assembly:

[0065] Following the method in Scenario 1, carefully disassemble the pressure gauge connected to the outlet end of the isolation needle valve.

[0066] Depending on the structure of the isolation needle valve, use a special tool to unscrew the valve cover or gland at the top of the valve, and then carefully remove the valve core assembly.

[0067] 3. Connect the unblocking device:

[0068] Select the most suitable adapter based on the thread type and size of the outlet end of the isolation needle valve.

[0069] Connect the selected adapter to the end of the high-pressure connection hose 2 that is furthest from the manual pressure pump 1.

[0070] Make a quick-release connection between the end of the high-pressure connecting hose 2 with the installation tube 9 and the output tube 3 of the manual pressure pump 1 to ensure a secure connection.

[0071] Carefully screw the assembled adapter into the outlet end of the isolation needle valve, at the original pressure gauge bend connection, ensuring a secure and sealed connection.

[0072] 4. Perform high-pressure flushing to clear blockages:

[0073] After confirming that the unblocking device is securely connected, slowly and steadily open the isolation needle valve. By rotating the valve stem, even if the valve core has been removed, the valve can still be simulated to ensure that the passage is unobstructed.

[0074] Operate manual pressure pump 1, applying pressure slowly and steadily. Closely monitor the reading on the pressure gauge on manual pressure pump 1.

[0075] Observe the pressure changes and the unblocking effect: When the blockage is broken, the pressure reading on the pressure monitoring gauge will suddenly drop. The high-pressure water flow will flush the blockage back into the main pipe.

[0076] After the blockage is broken, multiple pressurization-depressurization cycles can be performed, or the pressure can be maintained for a period of time to ensure that the internal passage of the isolation needle valve is thoroughly cleaned.

[0077] 5. Depressurization and dismantling:

[0078] After the blockage is cleared, slowly release the pressure inside the device through the pressure relief valve of the manual pressure pump until the pressure monitoring gauge reading is zero.

[0079] After the internal pressure of the device has been completely released, slowly close the isolation needle valve.

[0080] Carefully unscrew the connection between the drain cleaner and the valve, disconnect the quick-release connection between the high-pressure hose 2 and the manual pressure pump 1, and clean and properly store all components.

[0081] 6. Restore the isolation needle valve and perform final verification:

[0082] Carefully inspect the removed isolation needle valve core assembly to ensure it is undamaged, then reinstall it inside the valve body. Ensure it is properly installed and tighten the valve cover or gland to ensure a good seal.

[0083] Inspect the connection threads and sealing surfaces of the pressure gauge to ensure they are undamaged, then reinstall it onto the outlet end of the isolating needle valve. Ensure it is properly tightened and check for a tight seal.

[0084] Slowly open the isolation needle valve and observe the pressure gauge reading. If the pressure gauge accurately and stably displays the actual working pressure of the main pipeline, the blockage is successful and the pressure measurement function has returned to normal.

[0085] The above are merely preferred embodiments of this utility model and are not intended to limit this utility model. The scope of patent protection of this utility model shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of this utility model shall also be included within the scope of protection of this utility model.

Claims

1. An online unblocking device for power plant circulating water pressure measuring gauge pipes, characterized in that, include: Manual pressure pumps are used to generate high-pressure fluids; The high-pressure connecting hose has one end that can be quickly connected to the output pipe of the manual pressure pump, and the other end that can be connected to the union needle valve or the bend of the pressure gauge. Pressure monitoring gauges are installed on the manual pressure pump to monitor the applied pressure in real time during the unblocking process.

2. The on-line cleaning device for pressure measuring gauge tube of circulating water in power plant according to claim 1, characterized in that: The high-pressure connecting hose is fixedly connected to an installation tube that is inserted into the outside of the output tube, and a sealing gasket is fixedly connected to the end of the output tube away from the manual pressure pump.

3. The on-line cleaning device for pressure measuring gauge tube of circulating water in power plant according to claim 2, characterized in that: A limiting frame is fixedly connected to the outer side of the output pipe, and an arc-shaped extension plate is fixedly connected to the end of the mounting pipe away from the high-pressure connecting hose. A space for the arc-shaped extension plate to be inserted is formed between the limiting frame and the output pipe.

4. The on-line cleaning device for pressure measuring gauge tube of circulating water in power plant according to claim 3, characterized in that: The outer side of the output tube is rotatably connected to a ring, and a connecting rod is fixedly connected to the side of the ring facing the mounting tube. An arc-shaped rod is fixedly connected to the end of the connecting rod away from the ring, and an arc-shaped through hole for the arc-shaped rod to be inserted is opened at the end of the arc-shaped extension plate away from the mounting tube.

5. The on-line cleaning device for pressure measuring gauge tube of circulating water in power plant according to claim 4, characterized in that: A limiting block is fixedly connected to the output pipe on the side of the arc-shaped extension plate away from the connecting rod, and the limiting block fits against the side of the arc-shaped rod away from the ring.

6. The on-line cleaning device for pressure measuring gauge tube of circulating water in power plant according to claim 1, characterized in that: The end of the high-pressure connecting hose furthest from the manual pressure pump is used to install adapter assemblies of different specifications to adapt to the interface of the union needle valve or the bend of the pressure measuring gauge.

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