Pulverized coal conveying control valve for coal-fired power plant
By introducing motor-driven scraper cleaning components into the coal powder conveying control valve of coal-fired power plants, the problem of coal powder agglomeration and cleaning difficulties is solved, extending the service life of the equipment and reducing component losses.
Patent Information
- Application Number
- CN202323640282.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-29
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2033-12-29
AI Technical Summary
After a long time of use, the coal powder conveying control valve in the traditional coal-fired power plant may easily agglomerate, resulting in difficulty in cleaning and loss of parts.
A coal powder conveying control valve for coal-fired power plants is designed, which includes a cleaning component in the valve body, valve plate and medium channel. The scraper is driven by a motor to rotate in the medium channel to clean up the adhered coal powder, including ring gears and scrapers. Plate, rotating groove and drive mechanism to ensure timely cleaning of coal powder.
It effectively solves the problem of coal powder agglomeration and inconvenient cleaning on the inner wall, extends the service life of the valve, and reduces component losses.
Smart Images
Figure CN222163609U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of valves, and in particular relates to a pulverized coal conveying control valve for a coal-fired power plant. Background Art
[0002] A thermal power plant, also known as a thermal power plant, is a factory that uses combustible materials as fuel to produce electricity. Its basic production process is: when the fuel burns, it heats water to generate steam, converting the chemical energy of the fuel into thermal energy, and the thermal energy into mechanical energy; then it drives the generator to rotate, converting the mechanical energy into electrical energy to provide electricity for daily life or industrial enterprises.
[0003] Power plants with current technology generally use coal as fuel. The coal blocks are ground into powder by machinery and then supplied to the equipment. The amount of fuel in and out is controlled by the control valve body during the fuel delivery process. However, after long-term use, the coal powder remaining in the traditional control valve will clump together, resulting in the need to disassemble the control valve for cleaning. However, disassembly is troublesome and will also cause damage to parts. Utility Model Content
[0004] The utility model aims to provide a coal powder conveying control valve for a coal-fired power plant, so as to solve the problem that the coal powder on the inner wall of the valve cannot be processed in time and is easy to form agglomerates and is inconvenient to clean.
[0005] The utility model is realized by the following technical solutions:
[0006] In some embodiments, a pulverized coal delivery control valve for a coal-fired power plant includes a valve body and a valve plate disposed on the valve body;
[0007] A medium channel is provided on the valve body, and at least one set of cleaning components is provided in the medium channel;
[0008] The cleaning assembly includes a gear ring and a scraper disposed on the gear ring. A rotating groove matched with the gear ring is disposed in the medium channel. The gear ring is disposed in the rotating groove so that the axis of the gear ring coincides with the axis of the medium channel and the gear ring can rotate in the rotating groove around the axis of the medium channel. The scraper is disposed along the axial direction of the medium channel and contacts the inner wall of the medium channel.
[0009] A driving mechanism is arranged on the valve body, and the driving mechanism comprises a motor and a gear transmission assembly. The motor is connected to the gear transmission assembly, and the gear transmission assembly is meshingly connected with the gear ring. The motor drives the gear ring to rotate through the gear transmission assembly.
[0010] In some embodiments, the valve plate is arranged near the inlet or outlet of the medium channel, a group of cleaning components are arranged in the medium channel, one end of the scraper extends to the position of the valve plate, and the other end extends to a position close to the outlet or inlet of the medium channel.
[0011] In some embodiments, the valve plate is arranged near the middle of the medium channel, and a group of cleaning components are arranged on both sides of the valve plate in the medium channel. One end of the scraper extends to the position of the valve plate, and the other end extends to a position close to the outlet or inlet of the medium channel.
[0012] In some embodiments, a sleeve is disposed on the valve body in the medium channel, and the rotation groove is formed between an end of the sleeve inserted into the medium channel and a step surface of the valve body.
[0013] In some embodiments, a seal is provided between the end surface of the ring gear and the rotating groove.
[0014] In some embodiments, the control valve also includes a valve plate drive mechanism, which includes a fixed platform arranged on the valve body, and an opening and closing drive component is arranged on the fixed platform. The opening and closing drive component connects the valve plate and drives the valve plate to move linearly along the radial direction of the medium channel.
[0015] In some embodiments, the opening and closing drive assembly includes a drive motor, a screw rod, a fixed plate and a connecting piece arranged on a fixed platform, the screw rod is connected to the drive motor, the fixed plate is arranged on the valve body, a slide groove is arranged on the fixed plate, one end of the connecting piece is connected to the valve plate, and the other end is provided with a slider, the slider is arranged in the slide groove and is slidably connected with the slide grooves, and the screw rod and the slider are transmitted. Connection.
[0016] In some embodiments, a mounting block is provided on the valve body at the position where the valve plate is inserted, and a sealing block is provided on the mounting block. When the valve plate is inserted into the valve body, the valve plate and the sealing block are sealed and matched.
[0017] Compared with the prior art, the utility model has the following advantages and beneficial effects:
[0018] In the control valve of the utility model, a cleaning component is arranged in the medium channel. When the inner wall of the medium channel needs to be cleaned, the scraper is driven by a motor to rotate in the medium channel to clean the coal powder adhered in the medium channel, which effectively solves the problem that the coal powder agglomerates on the inner wall and is difficult to clean. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.
[0020] Figure 1 This is a schematic diagram of the structure of the control valve of the utility model.
[0021] Figure 2 for Figure 1 The cross-sectional view of the control valve along the axis of the medium channel is shown in FIG.
[0022] Figure 3 for Figure 2 Partial schematic diagram at point A in the middle.
[0023] Figure 4 for Figure 1 A sectional view of the control valve shown in FIG. 1 along the cross-sectional direction of the medium channel.
[0024] Figure 5 This is a schematic diagram of the gear ring structure in the control valve of the utility model.
[0025] Among them: 1. valve body; 2. mounting plate; 3. motor; 4. driving wheel; 5. support block; 6. driving auxiliary wheel; 7. rotating groove; 8. gear ring; 9. rotating mouth; 10. sleeve; 11. scraper; 12. valve plate; 13. fixed platform; 14. driving motor; 15. fixed plate; 16. screw rod; 17. slider; 18. connecting piece; 20. mounting block; 21. sealing block; 22. sealing; 24. slide groove. DETAILED DESCRIPTION
[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings 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.
[0027] Reference Figure 1 , Figure 2 and Figure 4 In some embodiments, a coal-fired power plant pulverized coal conveying control valve includes a valve body 1 and a valve plate 12 disposed on the valve body. The control valve adopts a gate valve structure, and the on-off of the valve is controlled by opening and closing the valve plate;
[0028] The valve body 1 is provided with a medium channel, and one or two groups of cleaning components are provided in the medium channel;
[0029] The cleaning assembly includes a gear ring 8 and a scraper 11 arranged on the gear ring 8. A rotating groove 7 matching the gear ring 8 is arranged in the medium channel. The gear ring 8 is arranged in the rotating groove 7 so that the axis of the gear ring 8 coincides with the axis of the medium channel and the gear ring 8 can rotate in the rotating groove 7 around the axis of the medium channel. The scraper 11 is arranged along the axial direction of the medium channel and contacts the inner wall of the medium channel.
[0030] A driving mechanism is provided on the valve body, and the driving mechanism includes a motor 3 and a gear transmission assembly. The motor 3 is connected to the gear transmission assembly, and the gear transmission assembly is meshingly connected with the ring gear 8. The motor 3 drives the ring gear 8 to rotate through the gear transmission assembly.
[0031] A cleaning component is arranged in the medium channel of the control valve. When the inner wall of the medium channel needs to be cleaned, the scraper 11 is driven by the motor 3 to rotate in the medium channel to clean the coal powder adhered in the medium channel, which effectively solves the problem of coal powder agglomerating on the inner wall and being difficult to clean.
[0032] Specifically, Figure 4 As shown, the motor 3 is fixedly arranged on the mounting plate 2, the mounting plate 2 is fixedly arranged on one side of the valve body 1, the gear transmission assembly includes a driving wheel 4 and a driving auxiliary wheel 6 which are meshingly connected, the driving wheel 4 is arranged on the rotating shaft of the motor 3, the driving auxiliary wheel 6 is arranged on the supporting block 5 and meshingly connected with the ring gear 8, so that the ring gear 8 is driven to rotate by the motor 3, and when the ring gear 8 rotates, it drives the scraper 11 to rotate along the inner wall of the medium channel to clean the coal powder on the inner wall of the medium channel, and the number of teeth of the driving wheel 4 and the driving auxiliary wheel 6 can be set to play a deceleration role.
[0033] like Figure 4 As shown, a rotation port 9 is provided on one side of the valve body 1 at the position of the gear ring 8 so that the gear transmission assembly can be connected to the gear ring 8 .
[0034] In some embodiments, when the valve plate 12 is set at a position close to the entrance or exit of the medium channel, a group of cleaning components are arranged in the medium channel, and one end of the scraper 11 extends to the position of the valve plate 12, and the other end extends to a position close to the entrance or exit of the medium channel. At this time, only one group of cleaning components needs to be set to clean the inner wall of the medium channel.
[0035] In some embodiments, Figure 2 As shown, when the valve plate 12 is set at a position close to the middle of the medium channel, a group of cleaning components are respectively arranged on both sides of the valve plate 12 in the medium channel, and one end of the scraper 11 extends to the position where the valve plate 12 is located, and the other end extends to a position close to the outlet or inlet of the medium channel. At this time, the inner wall of the medium channel on both sides of the valve plate 12 is cleaned by two groups of cleaning components.
[0036] In some embodiments, Figure 2 and Figure 3 As shown, a sleeve 10 is provided on the valve body 1 in the medium channel, and a rotation groove 7 is formed between the end of the sleeve 10 inserted into the medium channel and the step surface of the valve body 1. This structure is used to facilitate the installation of the gear ring 8 in the valve body 1. Figure 2 and Figure 3Taking the structure shown in as an example, during installation, the gear ring 8 is first positioned and installed on the step surface of the valve body 1, and then the sleeve 10 is installed in the medium channel. At this time, the step surface of the valve body 1 and the end surface of the sleeve 10 are respectively matched with the end surfaces of the two ends of the gear ring 8, so that the gear ring 8 can stably rotate in the rotation groove 7 formed between the step surface and the end surface of the sleeve 10.
[0037] In some embodiments, Figure 3 As shown, a seal 22 is provided between the end surface of the gear ring 8 and the rotating groove 7, so that this position has a good sealing performance to prevent leakage of the control valve.
[0038] In some embodiments, Figure 1 As shown, the control valve also includes a valve plate drive mechanism, which includes a fixed platform 13 arranged on the valve body 1, and an opening and closing drive component is arranged on the fixed platform 13. The opening and closing drive component is connected to the valve plate 12 and drives the valve plate 12 to perform linear motion along the radial direction of the medium channel.
[0039] In some embodiments, Figure 2 and Figure 4 As shown, the opening and closing drive assembly includes a drive motor 14, a screw rod 16, a fixed plate 15 and a connecting piece 18 arranged on a fixed platform 13, the screw rod 16 is connected to the drive motor 14, the fixed plate 15 is arranged on the valve body 1, and a slide groove 24 is arranged on the fixed plate 15. One end of the connecting piece 18 is connected to the valve plate 12, and the other end is provided with a slider 17, the slider 17 is arranged in the slide groove 24 and is slidably connected with the slide groove 24, and the screw rod 16 is in transmission connection with the slider 17. At this time, when the drive motor 14 is running, it can drive the valve plate 12 to move along the radial direction of the medium channel.
[0040] In some embodiments, Figure 2 As shown, a mounting block 20 is provided on the valve body 1 at the insertion position of the valve plate 12, and a sealing block 21 is provided on the mounting block 20. When the valve plate 12 is inserted into the valve body 1, the valve plate 12 and the sealing block 21 are sealed to make the control valve have good sealing performance.
[0041] In the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. used to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the utility model product is usually placed when used. They are only for the convenience of describing the present utility model 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 a limitation on the present utility model.
[0042] In addition, if the terms "horizontal" or "vertical" appear in the description of the present invention, it does not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0043] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it 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.
[0044] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.
Claims
1. A pulverized coal conveying control valve for a coal-fired power plant, characterized in that: It comprises a valve body (1) and a valve plate (12) arranged on the valve body; The valve body (1) is provided with a medium channel, and at least one set of cleaning components is provided in the medium channel; The cleaning assembly comprises a gear ring (8) and a scraper (11) arranged on the gear ring, a rotation groove (7) cooperating with the gear ring (8) is arranged in the medium channel, the gear ring (8) is arranged in the rotation groove (7), the axis of the gear ring (8) coincides with the axis of the medium channel and the gear ring (8) can rotate around the axis of the medium channel in the rotation groove (7), and the scraper (11) is arranged along the axial direction of the medium channel and contacts the inner wall of the medium channel; The valve body (1) is provided with a driving mechanism, the driving mechanism comprising a motor (3) and a gear transmission assembly, the motor (3) is connected to the gear transmission assembly, the gear transmission assembly is meshingly connected to the ring gear (8), and the motor (3) drives the ring gear (8) to rotate via the gear transmission assembly.
2. A pulverized coal conveying control valve for a coal-fired power plant according to claim 1, characterized in that: The valve plate (12) is arranged at a position close to the inlet or outlet of the medium channel, a group of cleaning components are arranged in the medium channel, and one end of the scraper (11) extends to the position where the valve plate (12) is located, and the other end extends to a position close to the outlet or inlet of the medium channel.
3. A pulverized coal conveying control valve for a coal-fired power plant according to claim 1, characterized in that: The valve plate (12) is arranged at a position close to the middle of the medium channel, and a group of cleaning components are respectively arranged on both sides of the valve plate (12) in the medium channel. One end of the scraper (11) extends to the position where the valve plate (12) is located, and the other end extends to a position close to the outlet or inlet of the medium channel.
4. A pulverized coal conveying control valve for a coal-fired power plant according to claim 1, 2 or 3, characterized in that: A sleeve (10) is provided on the valve body (1) in the medium channel, and the rotation groove (7) is formed between an end of the sleeve (10) inserted into the medium channel and a step surface of the valve body (1).
5. A pulverized coal conveying control valve for a coal-fired power plant according to claim 1, 2 or 3, characterized in that: A sealing member (22) is provided between the end surface of the gear ring (8) and the rotation groove (7).
6. A pulverized coal conveying control valve for a coal-fired power plant according to claim 1, characterized in that: It also includes a valve plate drive mechanism, the valve plate drive mechanism including a fixed platform (13) arranged on the valve body (1), an opening and closing drive component being arranged on the fixed platform (13), the opening and closing drive component being connected to the valve plate (12) and driving the valve plate (12) to perform linear motion along the radial direction of the medium channel.
7. A pulverized coal conveying control valve for a coal-fired power plant according to claim 6, characterized in that: The opening and closing drive assembly comprises a drive motor (14), a screw rod (16), a fixed plate (15) and a connecting piece (18) arranged on a fixed platform (13); the screw rod (16) is connected to the drive motor (14); the fixed plate (15) is arranged on the valve body (1); a slide groove (24) is arranged on the fixed plate (15); one end of the connecting piece (18) is connected to the valve plate (12); and the other end is provided with a slider (17); the slider (17) is arranged in the slide groove (24) and is slidably connected to the slide groove (24); the screw rod (16) and the slider (17) are transmission-connected.
8. The pulverized coal conveying control valve for a coal-fired power plant according to claim 1, characterized in that: A mounting block (20) is provided on the valve body (1) at a position where the valve plate (12) is inserted, and a sealing block (21) is provided on the mounting block (20); when the valve plate (12) is inserted into the valve body (1), the valve plate (12) and the sealing block (21) are in sealing cooperation.