Closed electro-hydraulic double-layer cinder valve

Abstract

The utility model belongs to the technical field of cinder valves, and particularly relates to a closed type electro-hydraulic double-layer cinder valve which comprises a valve body and an electro-hydraulic power device, an ash hopper bin is arranged on the valve body, a gate valve is arranged at the top of the ash hopper bin, a first ash inlet communicated with the ash hopper bin is formed in the top of the valve body, and a second ash inlet is formed in a middle partition plate in the valve body. A first flap valve is arranged below the first ash inlet, and a second flap valve is arranged below the second ash inlet; the electro-hydraulic power device comprises a hydraulic station, the hydraulic station is connected with a first hydraulic assembly, a second hydraulic assembly and a third hydraulic assembly, the first hydraulic assembly is electrically connected with the gate valve, the second hydraulic assembly is electrically connected with the first flap valve, and the third hydraulic assembly is electrically connected with the second flap valve. The gate valve, the first flap valve and the second flap valve are controlled to be opened and closed intermittently through the first hydraulic assembly, the second hydraulic assembly and the third hydraulic assembly respectively, three independent spaces are formed, and multi-area partition and ash discharging are achieved. In use, the device ensures that at least one valve plate is closed, air and the valve bin are prevented from fleeing, and the air tightness of the system is ensured.

Description

Technical Field

[0001] This utility model belongs to the technical field of ash discharge valves, and in particular relates to a closed electro-hydraulic double-layer ash discharge valve. Background Technology

[0002] Currently, the main types of ash discharge valves used in flue gas pipelines under negative pressure are the counterweight double-layer ash discharge valve and the pneumatic double-layer ash discharge valve.

[0003] The working principle of the double-layer ash discharge valve is based on the self-weight of the counterweight for sealing. When the weight of the accumulated ash exceeds the weight of the counterweight, the valve will automatically open to discharge the ash. It has a simple structure and low cost. However, during use, when the counterweight valve is tilted down to discharge ash and then reset, the accumulated ash may jam the valve body, preventing the valve body from closing completely. This causes outside air to flow back into the flue, resulting in air leakage. Moreover, the backflowing air is in the opposite direction to the smoke discharge in the flue, which will hinder the discharge of soot in the flue and cause serious ash accumulation. The accumulated ash can only be released manually, which is time-consuming and labor-intensive. At the same time, the soot carried by the high-speed backflowing air will seriously wear down the valve body and ash hopper, shortening the service life of the ash discharge valve and increasing the equipment investment cost.

[0004] The working principle of the pneumatic double-layer ash discharge valve is to determine whether the valve body opens to discharge ash by judging whether the time and material level meet the preset conditions. It can realize automated control. However, when a large amount of material is discharged at one time, the ash inlet of the valve body is easily blocked, causing the pressure plate to fail to close. At this time, manual cleaning is required, which affects production efficiency. Moreover, the existing sealing ring is set on the pressure plate. When the pressure plate is closed, the accumulated ash material will wash the sealing ring on the pressure plate, causing the sealing ring to be worn, resulting in air leakage of the ash discharge valve, leading to ash accumulation and equipment wear.

[0005] At the same time, in the existing technology, the valve body seal of the two ash discharge valves is not complete enough, and it cannot guarantee that the accumulated ash can be discharged quickly and smoothly without disrupting the negative pressure environment inside the flue.

[0006] Therefore, there is an urgent need to design a closed electro-hydraulic double-layer ash discharge valve that can ensure that the negative pressure environment inside the pipeline is not damaged, and has good sealing performance and high reliability. Utility Model Content

[0007] To overcome the problems existing in the background technology, this utility model provides a closed electro-hydraulic double-layer ash discharge valve, including a valve body and an electro-hydraulic power device electrically connected to the valve body. The top of the valve body is provided with an ash hopper, and the top of the ash hopper is provided with a slide valve. The top of the valve body is provided with a first ash inlet communicating with the bottom of the ash hopper. The inside of the valve body is provided with a middle partition, and the partition is provided with a second ash inlet. Below the first ash inlet is a first flap valve, and below the second ash inlet is a second flap valve. The bottom of the valve body is provided with an ash discharge port.

[0008] The electro-hydraulic power unit includes a hydraulic station, on which a first hydraulic component, a second hydraulic component, and a third hydraulic component are respectively connected. The first hydraulic component is electrically connected to a slide gate valve, the second hydraulic component is electrically connected to a first flap valve, and the third hydraulic component is electrically connected to a second flap valve.

[0009] Furthermore, the slide gate valve includes a slide gate valve frame disposed on the top of the ash hopper, a slide gate valve guide rail disposed within the slide gate valve frame, a slide gate valve plate slidably disposed on the slide gate valve guide rail, and one end of the slide gate valve plate being electrically connected to the first hydraulic component.

[0010] Furthermore, the first flap valve and the second flap valve have the same structure. Both the first flap valve and the second flap valve include a pressure plate and a pressure plate shaft assembly. The upper end faces of the two pressure plates are respectively sealed and connected to the first ash inlet and the second ash inlet. The lower end faces of the two pressure plates are each provided with a pressure plate shaft assembly. The two pressure plate shaft assemblies are respectively rotatably connected to the second hydraulic assembly and the third hydraulic assembly.

[0011] Furthermore, the first hydraulic assembly includes a first hydraulic cylinder connected to a hydraulic station. The telescopic end of the first piston rod of the first hydraulic cylinder is provided with a first fixing member for fixing the slide valve plate. The slide valve plate is reciprocated by the telescopic extension and retraction of the first hydraulic cylinder controlled by the hydraulic station.

[0012] Furthermore, the second and third hydraulic assemblies have the same structure and are located on the outer wall of the valve body. Both the second and third hydraulic assemblies include a second hydraulic cylinder, a second fixing member, and a clamping crank arm. Both second hydraulic cylinders are connected to the hydraulic station. The second piston rod of each of the two second hydraulic cylinders is provided with a second fixing member. Each of the two second fixing members is hinged with a clamping crank arm, and the two clamping crank arms are respectively sleeved on one end of the two pressure plate shaft assemblies.

[0013] Furthermore, the pressure plate shaft assembly includes a pressure plate connecting arm fixedly connected to the lower end face of the pressure plate. The lower end of the pressure plate connecting arm is provided with a connecting arm bushing. A central shaft that penetrates the outer wall of the valve body is sleeved inside the connecting arm bushing. A bearing seat is provided on the central shaft near the outer wall of the valve body. The bearing seat is fixedly connected to the outer wall of the valve body. A clamping crank arm is sleeved on one end of the central shaft.

[0014] Furthermore, the first hydraulic component also includes a first limit switch and a second limit switch arranged at left and right intervals, and a slide valve limit plate is provided on the slide valve plate to contact the first limit switch or the second limit switch during reciprocating sliding.

[0015] Furthermore, both the second and third hydraulic components include a third limit switch and a fourth limit switch spaced vertically. A pressure plate limiting plate that contacts the third or fourth limit switch is sleeved on one end of the central shaft near the clamping crank arm. When the central shaft rotates, it causes the pressure plate limiting plate to rotate and touch the third or fourth limit switch, thereby opening or closing the first ash inlet and / or the second ash inlet.

[0016] Furthermore, both the first and second ash inlets are provided with rings connected to the inner surface of the valve body top wall near the upper surface of the pressure plate. A sealing ring is provided on the outer wall of the ring, and a rubber ring clamp is provided on the outer wall of the sealing ring.

[0017] Furthermore, the pressure plate connecting arm includes a flange fixedly connected to the pressure plate, a vertical connecting arm is fitted inside the flange, the top of the vertical connecting arm is provided with a hemispherical protrusion, an elastic element is provided on the hemispherical protrusion, the lower end face of the pressure plate is provided with a groove that matches the hemispherical protrusion, the elastic element is located between the groove and the hemispherical protrusion, and the lower end of the vertical connecting arm is fixedly connected to one end of the connecting arm bushing.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] (1) This utility model controls the intermittent opening and closing of the slide valve, the first flap valve and the second flap valve through the first hydraulic component, the second hydraulic component and the third hydraulic component in the electro-hydraulic power device, respectively, to form three relatively independent ash unloading spaces, realize multi-area isolation and complete multi-layer ash unloading operation; at the same time, during use or maintenance, the ash unloading valve can ensure that at least one valve plate is in the closed state, which can effectively prevent the outside air from entering the valve chamber and keep its negative pressure state unaffected, thus ensuring the airtightness of the entire system and providing a guarantee for online ash unloading.

[0020] (2) In this utility model, the first ash inlet and the second ash inlet of the valve body are both equipped with a full ring of sealing rubber ring, which makes the pressure plate of the first flap valve and the first ash inlet and the second ash inlet more fully abut against each other, greatly reducing the leakage of the ash discharge valve. At the same time, the accumulated ash will not directly wash against the sealing rubber ring during the material discharge process, which extends the service life of the sealing rubber ring and improves the durability of the ash discharge valve.

[0021] (3) In this utility model, by using a hydraulic station to control three hydraulic components to control the opening and closing of a slide valve plate and two pressure plates, each hydraulic component can work independently and can provide a large torque, ensuring better sealing when the ash discharge valve is closed, and improving the reliability of the equipment.

[0022] (4) Each hydraulic component in this utility model is equipped with two limit switches. The two limit switches are set at intervals to ensure that the valve body is opened and closed in place, effectively avoiding damage to mechanical parts and motors, and extending the service life of the ash discharge valve. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the overall structure of the double-layer ash discharge valve of this utility model;

[0025] Figure 2 This is a schematic diagram of the overall structure of the double-layer ash discharge valve of this utility model from another angle;

[0026] Figure 3 This is an exploded structural diagram of the double-layer ash discharge valve of this utility model after the hydraulic station has been removed;

[0027] Figure 4 This is a cross-sectional structural diagram of the double-layer ash discharge valve of this utility model;

[0028] Figure 5 This is a schematic diagram of the valve body in the double-layer ash discharge valve of this utility model;

[0029] Figure 6 This is an exploded structural diagram of the slide gate valve in the double-layer ash discharge valve of this utility model;

[0030] Figure 7 This is a schematic diagram of the structure of the first flap valve and the second hydraulic component installed on the valve body in the double-layer ash discharge valve of this utility model;

[0031] Figure 8 This is an exploded structural diagram of the first flap valve and the second hydraulic component in the double-layer ash discharge valve of this utility model;

[0032] Wherein: 1-valve body, 101-first ash inlet, 102-middle partition, 103-second ash inlet, 104-ash discharge port, 105-observation window, 106-maintenance port, 2-electro-hydraulic power unit, 21-hydraulic station, 22-first hydraulic component, 220-first hydraulic cylinder, 2201-first piston rod, 221-first fixing component, 222-first limit switch, 223-second limit switch, 23-second hydraulic component, 24-third hydraulic component, 3-ash hopper, 4-slide gate valve, 41-slide gate valve frame, 42-slide gate valve guide rail, 43-slide gate valve plate, 430-slide gate valve limit plate, 44-slide gate valve Cover plate, 45-slide valve seal, 5-first flap valve, 6-second flap valve, 7-pressure plate, 71-groove, 8-pressure plate shaft assembly, 81-pressure plate connecting arm, 810-flange, 811-vertical connecting arm, 812-hemispherical protrusion, 813-elastic element, 82-connecting arm bushing, 83-central shaft, 84-bearing seat, 9-second hydraulic cylinder, 91-second piston rod, 10-second fixing element, 11-clamping crank arm, 12-third limit switch, 13-fourth limit switch, 14-pressure plate limit plate, 15-ring cylinder, 16-sealing ring, 17-ring clamp, 18-protective cover, 19-pointer assembly. Detailed Implementation

[0033] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0034] The following is combined Figures 1 to 8 The present invention will be described in detail with specific embodiments. This is for the purpose of facilitating the description of this application.

[0035] This utility model provides a closed electro-hydraulic double-layer ash discharge valve, including a valve body 1 and an electro-hydraulic power device 2 electrically connected to the valve body 1. The top of the valve body 1 is provided with an ash hopper 3, and the top of the ash hopper 3 is provided with a gate valve 4. The top of the valve body 1 is provided with a first ash inlet 101 communicating with the bottom of the ash hopper 3. The inside of the valve body 1 is provided with a middle partition 102, and the partition 102 is provided with a second ash inlet 103. The first ash inlet 101 is provided with a first flap valve 5, and the second ash inlet 103 is provided with a second flap valve 6. The bottom of the valve body 1 is provided with an ash discharge port 104. The electro-hydraulic power device 2 includes a hydraulic station 21, and the hydraulic station 21 is respectively connected to a first hydraulic component 22, a second hydraulic component 23, and a third hydraulic component 24. The first hydraulic component 22 is electrically connected to the gate valve 4, the second hydraulic component 23 is electrically connected to the first flap valve 5, and the third hydraulic component 24 is electrically connected to the second flap valve 6.

[0036] In the present utility model, the valve body 1 is a rectangular metal box, and the ash hopper 3 has a funnel-shaped structure. The bottom end of the ash hopper 3 is detachably connected to the top of the valve body 1 by flange bolts. The ash inlet of the ash hopper 3 communicates with the first ash inlet 101. The funnel-shaped ash hopper 3 can quickly and smoothly gather the accumulated ash at the first ash inlet 101. The shapes of the valve body 1 and the ash hopper 3 are not limited here, and those skilled in the art can design them according to production needs. In some embodiments, the hydraulic station 21 is installed on the outer side wall of the valve body 1 through a metal bracket. Through holes for installing the second hydraulic component 23 and the third hydraulic component 24 are provided on the outer side wall of the valve body 1. The output ends of the second hydraulic component 23 and the third hydraulic component 24 respectively pass through the through holes and are connected to the first flap valve 5 and the second flap valve 6. The entire ash discharge valve has a compact structure and occupies a small space. In the present utility model, the first hydraulic component 22 in the electro-hydraulic power device 2 controls the sliding of the plug valve 4 to realize the opening and closing of the top end of the upper ash hopper 3; the second hydraulic component 23 and the third hydraulic component 24 respectively control the opening and closing of the first flap valve 5 and the second flap valve 6 to realize the opening and closing control of the upper and lower two ash inlets in the valve body 1. In the present utility model, the first hydraulic component, the second hydraulic component, and the third hydraulic component respectively control the intermittent opening and closing of the plug valve, the first flap valve, and the second flap valve to form three relatively independent ash discharge spaces, realize multi-region partitioning, and complete multi-layer ash discharge operations; at the same time, during use or maintenance, the ash discharge valve can ensure that at least one valve plate is in a closed state, can effectively avoid the air leakage between the outside air and the valve chamber, keep the negative pressure state unaffected, and ensure the airtightness of the entire system, thereby providing a guarantee for on-line ash discharge.

[0037] Specifically, referring to Figures 1-4 、 Figure 6 In some embodiments, the plug valve 4 includes a plug valve frame 41 provided at the top of the ash hopper 3. A plug valve guide rail 42 is provided inside the plug valve frame 41. A plug valve plate 43 is slidably provided on the plug valve guide rail 42. One end of the plug valve plate 43 is electrically connected to the first hydraulic component 22. In this embodiment, the plug valve frame 41 is welded by channel steel and is in an overall shape of a Chinese character 'Ri'. The first hydraulic component 22 is fixedly installed on the outer side wall of the plug valve frame 41. The plug valve guide rail 42 is in an L shape and is symmetrically arranged on both sides of the inner wall of the plug valve frame 41. The plug valve plate 43 is a rectangular metal plate. The hydraulic station 21 controls the first hydraulic component 22 to make the plug valve plate 43 reciprocate along the direction of the plug valve guide rail 42 to realize the opening and closing control of the top end of the ash hopper 3.

[0038] Specifically, referring to Figures 1-4 、 Figures 7-8In some embodiments, the first flap valve 5 and the second flap valve 6 have the same structure. Both the first flap valve 5 and the second flap valve 6 include a pressure plate 7 and a pressure plate shaft assembly 8. The upper end faces of the two pressure plates 7 are respectively sealed to the first ash inlet 101 and the second ash inlet 103. The lower end faces of the two pressure plates 7 are each provided with a pressure plate shaft assembly 8. The two pressure plate shaft assemblies 8 are respectively rotatably connected to the second hydraulic assembly 23 and the third hydraulic assembly 24. In this embodiment, the first ash inlet 101 and the second ash inlet 103 are circular holes. The pressure plate 7 is a circular metal plate that matches the shape and size of the first ash inlet 101 and the second ash inlet 103. According to actual production needs, the second hydraulic assembly 23 and the third hydraulic assembly 24 are controlled by the hydraulic station 21 to control the two pressure plates 7 to press or open the first ash inlet 101 and the second ash inlet 103 respectively.

[0039] For details, please refer to Figures 1-4 , Figure 6 In some embodiments, the first hydraulic assembly 22 includes a first hydraulic cylinder 220 connected to a hydraulic station 21. The telescopic end of the first piston rod 2201 of the first hydraulic cylinder 220 is provided with a first fixing member 221 for fixing the slide valve plate 43. The extension and retraction of the first hydraulic cylinder 220, controlled by the hydraulic station 21, causes the slide valve plate 43 to slide back and forth. In this embodiment, the first piston rod 2201 passes through one end of the slide valve frame 41 and is fixedly connected to one end of the slide valve plate 43 through the first fixing member 221. The hydraulic station 21 controls the extension and retraction of the first piston rod 2201 in the first hydraulic cylinder 220 to achieve the left-right back-and-forth sliding of the slide valve plate 43.

[0040] For details, please refer to Figures 1-4 , Figures 7-8In some embodiments, the second hydraulic assembly 23 and the third hydraulic assembly 24 have the same structure. The second hydraulic assembly 23 and the third hydraulic assembly 24 are disposed on the outer side wall of the valve body 1. Both the second hydraulic assembly 23 and the third hydraulic assembly 24 include a second hydraulic cylinder 9, a second fixing member 10 and a clamping crank arm 11. Both second hydraulic cylinders 9 are connected to the hydraulic station 21. The second piston rod 91 of both second hydraulic cylinders 9 is provided with a second fixing member 10. The two second fixing members 10 are respectively hinged with clamping crank arms 11. The two clamping crank arms 11 are respectively sleeved on one end of the two pressure plate shaft assemblies 8. To better protect the second hydraulic assembly 23 and the third hydraulic assembly 24, both 23 and 24 include a cuboid metal protective cover 18 and a pointer assembly 19. The protective cover 18 is installed outside the second hydraulic cylinder 9, the second fixing member 10, and the clamping crank arm 11. The pointer assembly 19 is installed outside the protective cover 18 and coaxially connected to the clamping crank arm 11 to display the working status of the second hydraulic assembly 23 and the third hydraulic assembly 24. The hydraulic station 21 controls the extension and retraction of the second piston rod 91 on the hydraulic cylinder 9, causing the clamping crank arm 11 connected to the second fixing member 10 to rotate, thereby driving the pressure plate shaft assembly 8 connected to it to rotate, thus realizing the clamping or opening of the pressure plate 7 with the first ash inlet 101 or the second ash inlet 103.

[0041] For details, please refer to Figure 4 , Figures 7-8 In some embodiments, the pressure plate shaft assembly 8 includes a pressure plate connecting arm 81 fixedly connected to the lower end face of the pressure plate 7. The lower end of the pressure plate connecting arm 81 is provided with a connecting arm bushing 82. A central shaft 83, penetrating the outer wall of the valve body 1, is fitted inside the connecting arm bushing 82. A bearing seat 84 is provided on the central shaft 83 near the outer wall of the valve body 1. The bearing seat 84 is fixedly connected to the outer wall of the valve body 1. A clamping crank arm 11 is fitted onto one end of the central shaft 83. The hydraulic station 21 controls the extension and retraction of the second piston rod 91 on the hydraulic cylinder 9, causing the clamping crank arm 11 connected to the second fixing member 10 to rotate. This, in turn, drives the connecting arm bushing 82 fixedly connected to the central shaft 83 to rotate, thereby causing the pressure plate 7 fixedly connected to the pressure plate connecting arm 81 to press or open against the first ash inlet 101 or the second ash inlet 103.

[0042] For details, please refer to Figures 3-4 , Figure 6In some embodiments, the first hydraulic component 22 further includes a first limit switch 222 and a second limit switch 223 arranged at left and right intervals, and the slide valve plate 43 is provided with a slide valve limiting plate 430 that contacts the first limit switch 222 or the second limit switch 223 during reciprocating sliding. In this embodiment, the first hydraulic component 22 also includes a slide gate valve cover plate 44 covering the upper right side of the slide gate valve frame 41. The slide gate valve limiting plate 430 is a rectangular metal block welded to the front end of the upper surface of the slide gate valve plate 43. When the slide gate valve plate 43 slides under the action of the first hydraulic cylinder 220, the slide gate valve limiting plate 430 touches the contact of the first limit switch 222. The first limit switch 222 disconnects the circuit, the hydraulic station 21 stops supplying oil and maintains the oil pressure unchanged, and the first piston rod 2201 stops extending, so that the slide gate valve plate 43 stops at the closed limit position. When the slide gate valve limiting plate 430 touches the contact of the second limit switch 223, the second limit switch 223 disconnects the circuit, the hydraulic station 21 stops returning oil and maintains the oil pressure unchanged, and the first piston rod 2201 stops retracting, so that the slide gate valve plate 43 stops at the open limit position. By setting two limit switches, the slide gate valve 4 can be guaranteed to stop at the preset opening and closing limit positions, effectively avoiding damage to mechanical parts and motors, and extending the service life of the ash discharge valve.

[0043] Preferably, the extension and retraction stroke of the first piston rod 2201 in the first hydraulic cylinder 220 is the same as the opening and closing limit of the slide valve plate 43. When the first limit switch 222 and / or the second limit switch 223 fails or is damaged, the slide valve plate 43 will not damage the mechanical parts and the motor, further ensuring the service life of the ash discharge valve.

[0044] For details, please refer to Figures 7-8In this embodiment, both the second hydraulic component 23 and the third hydraulic component 24 include a third limit switch 12 and a fourth limit switch 13 arranged at an upper and lower interval. A pressure plate limiting plate 14 that contacts the third limit switch 12 or the fourth limit switch 13 is sleeved on one end of the central shaft 83 near the clamping crank arm 11. When the central shaft 83 rotates, it drives the plate limiting plate 14 to rotate and touch the third limit switch 12 or the fourth limit switch 13, so that the pressure plate 7 opens or closes the first ash inlet 101 and / or the second ash inlet 103. In this embodiment, the hydraulic station 21 controls the extension and retraction of the second piston rod 91 of the second hydraulic cylinder 9, causing the clamping crank arm 11 to swing, which in turn causes the central shaft 83 to rotate. When the central shaft 83 rotates, the pressure plate limiting plate 14 fixedly installed on the central shaft 83 also rotates. When the pressure plate limiting plate 14 rotates upward, it will touch the contact of the fourth limit switch 13, which will disconnect the circuit. The hydraulic station will stop supplying oil and maintain a constant oil pressure. The second piston rod 91 will no longer extend, and the pressure plate 7 will stop at the closed limit position. When the pressure plate limiting plate 14 rotates downward, it will touch the contact of the third limit switch 12, which will disconnect the circuit. The hydraulic station 21 will no longer supply oil and maintain a constant oil pressure. The second piston rod 91 will no longer extend, and the pressure plate 7 will stop at the open limit position. This ensures that the first flap valve 5 and the second flap valve 6 can stop at the preset opening and closing limit positions.

[0045] For details, please refer to Figures 4-5 In some embodiments, both the first ash inlet 101 and the second ash inlet 103 are provided with a ring cylinder 15 near the upper end face of the pressure plate 7, which is connected to the inner surface of the top wall of the valve body 1. A sealing ring 16 is provided on the outer wall of the ring cylinder 15, and a ring clamp 17 is provided on the outer wall of the sealing ring 16. In this embodiment, the sealing ring 16 is preferably a silicone sealing ring, which is a figure-eight shaped sealing ring with a smaller top and a larger bottom. The sealing ring 16 is fixed to the ring cylinder 15 by the metal ring clamp 17. This design prevents the accumulated ash from directly washing onto the sealing ring 16 during the material discharge process, improves the sealing effect, extends the service life of the sealing ring 16, and has an ingenious structure.

[0046] For details, please refer to Figure 4 , Figure 8In some embodiments, the pressure plate connecting arm 81 includes a flange 810 fixedly connected to the pressure plate 7. A vertical connecting arm 811 is fitted inside the flange 810. The top of the vertical connecting arm 811 is provided with a hemispherical protrusion 812, and an elastic element 813 is provided on the hemispherical protrusion 812. The lower end face of the pressure plate 7 is provided with a groove 71 adapted to the hemispherical protrusion 812. The elastic element 813 is located between the groove 71 and the hemispherical protrusion 812. The lower end of the vertical connecting arm 811 is fixedly connected to one end of the connecting arm bushing 82. In this embodiment, the pressure plate connecting arm 81 is detachably connected to the pressure plate 7 via the flange 810 and bolts. The elastic element 813 is preferably a spring. By the ball joint between the elastic element 813 on the hemispherical protrusion 812 and the pressure plate 7, the pressure plate connecting arm 81 has a good buffering effect, which can effectively offset the uneven force when the pressure plate 7 contacts the sealing ring 16 due to manufacturing errors.

[0047] For details, please refer to Figures 1-4 , Figure 6 In some embodiments, a gate valve seal 45 is provided on the upper surface of the gate valve plate 43 on the left side inside the gate valve frame 41. The gate valve seal 45 is composed of four long strip metal plates, and the lower ends of the four long strip metal plates are inclined inward and welded inside the gate valve frame 41.

[0048] For details, please refer to Figures 1-4 In some embodiments, an observation window 105 and a maintenance port 106 are respectively provided on the outer side wall of the valve body 1. There are two observation windows 105 and two maintenance ports 106. The observation windows 105 are arranged vertically on one side wall of the valve body 1, and the two maintenance ports 106 are arranged vertically on the other side wall of the valve body 1. By installing two observation windows 105 and two rear maintenance ports 106 on the valve body 1, it is convenient for later maintenance.

[0049] The working principle of this enclosed electro-hydraulic double-layer ash discharge valve is as follows:

[0050] (1) In the initial state, the slide valve plate 43 in the slide valve 4 on the ash hopper 3 is in the open state, and the first flap valve 5 and the second flap valve 6 are both in the closed state, and the ash falls into the ash hopper 3.

[0051] (2) When the storage time is set (the factory program is set to 30 minutes, which can be adjusted by those skilled in the art according to actual needs), the ash discharge valve starts to enter the ash discharge working mode. The hydraulic station 21 controls the first piston rod 2201 of the first hydraulic cylinder 220 to extend, driving the slide valve plate 43 to move from right to left. When the slide valve limit plate 430 touches the contact of the first limit switch 222, the first limit switch 222 disconnects the circuit, the hydraulic station 21 stops supplying oil and maintains the oil pressure unchanged, the first piston rod 2201 stops extending, and the slide valve plate 43 stops at the closed limit position.

[0052] (3) After the slide valve plate 43 is closed for 2 seconds (the time is adjustable), the hydraulic station 21 controls the second hydraulic component 23 to make the pressure plate 7 in the first flap valve 5 rotate downward and open the first ash inlet 101. The ash in the ash hopper 3 falls downward into the valve body 1 of the next layer.

[0053] (4) After 10 seconds (time adjustable), the hydraulic station 21 controls the second hydraulic component 23 to make the pressure plate 7 in the first flap valve 5 rotate upward and press the first ash inlet 101. After the pressure plate 7 in the first flap valve 5 is closed for 2 seconds (time adjustable), the hydraulic station 21 controls the third hydraulic component 24 to make the pressure plate 7 in the second flap valve 6 rotate downward and open the second ash inlet 103. The accumulated ash in the valve body 1 slides down and is discharged through the ash discharge port 104.

[0054] (5) After the pressure plate 7 in the second flap valve 6 is opened for 30 seconds (the discharge time is set to 30 seconds by the factory program and is adjustable), the hydraulic station 21 controls the third hydraulic component 24 to make the pressure plate 7 in the second flap valve 6 rotate upward and press the second ash inlet 103.

[0055] (6) Wait for the program to reset. The factory program is set to 1 minute (time adjustable). After 1 minute, the hydraulic station 21 controls the first piston rod 2201 of the first hydraulic cylinder 220 to retract, driving the slide valve plate 43 to move from left to right. When the slide valve limit plate 430 touches the contact of the second limit switch 223, the second limit switch 223 disconnects the circuit, the hydraulic station 21 no longer returns oil and maintains the oil pressure unchanged, the first piston rod 2201 no longer retracts, and the slide valve plate 43 stops at the open limit position.

[0056] By repeating the above process, the automatic and timed discharge of accumulated ash material is achieved.

[0057] The present invention has been further described above with reference to specific embodiments. However, it should be understood that the specific description herein should not be construed as limiting the substance and scope of the present invention. Various modifications made by those skilled in the art to the above embodiments after reading this specification are all within the scope of protection of the present invention.

Claims

1. A closed electro-hydraulic double-layer ash discharge valve, characterized in that, Includes a valve body (1) and an electro-hydraulic power device (2) electrically connected to the valve body (1). The top of the valve body (1) is provided with an ash hopper (3), and the top of the ash hopper (3) is provided with a gate valve (4). The valve body (1) has a first ash inlet (101) at the top that communicates with the bottom of the ash hopper (3). The valve body (1) has a middle partition (102) inside. The partition (102) has a second ash inlet (103) on it. The first ash inlet (101) has a first flap valve (5) below it. The second ash inlet (103) has a second flap valve (6) below it. The valve body (1) has an ash discharge port (104) at the bottom. The electro-hydraulic power unit (2) includes a hydraulic station (21), on which a first hydraulic component (22), a second hydraulic component (23) and a third hydraulic component (24) are respectively connected. The first hydraulic component (22) is electrically connected to the slide gate valve (4), the second hydraulic component (23) is electrically connected to the first flap valve (5), and the third hydraulic component (24) is electrically connected to the second flap valve (6).

2. The enclosed electro-hydraulic double-layer ash discharge valve according to claim 1, characterized in that, The slide gate valve (4) includes a slide gate valve frame (41) set on the top of the ash hopper (3), a slide gate valve guide rail (42) is provided inside the slide gate valve frame (41), a slide gate valve plate (43) is slidably provided on the slide gate valve guide rail (42), and one end of the slide gate valve plate (43) is electrically connected to the first hydraulic component (22).

3. The enclosed electro-hydraulic double-layer ash discharge valve according to claim 1, characterized in that, The first flap valve (5) and the second flap valve (6) have the same structure. Both the first flap valve (5) and the second flap valve (6) include a pressure plate (7) and a pressure plate shaft assembly (8). The upper end faces of the two pressure plates (7) are respectively sealed to the first ash inlet (101) and the second ash inlet (103). The lower end faces of the two pressure plates (7) are provided with pressure plate shaft assemblies (8). The two pressure plate shaft assemblies (8) are respectively rotatably connected to the second hydraulic assembly (23) and the third hydraulic assembly (24).

4. The enclosed electro-hydraulic double-layer ash discharge valve according to claim 2, characterized in that, The first hydraulic assembly (22) includes a first hydraulic cylinder (220) connected to the hydraulic station (21). The telescopic end of the first piston rod (2201) of the first hydraulic cylinder (220) is provided with a first fixing member (221) for fixing the slide valve plate (43). The first hydraulic cylinder (220) is controlled to telescopically extend and retract by the hydraulic station (21) so that the slide valve plate (43) slides back and forth.

5. The enclosed electro-hydraulic double-layer ash discharge valve according to claim 3, characterized in that, The second hydraulic assembly (23) and the third hydraulic assembly (24) have the same structure. The second hydraulic assembly (23) and the third hydraulic assembly (24) are disposed on the outer side wall of the valve body (1). The second hydraulic assembly (23) and the third hydraulic assembly (24) each include a second hydraulic cylinder (9), a second fixing member (10) and a clamping crank arm (11). Both second hydraulic cylinders (9) are connected to the hydraulic station (21). The second piston rod (91) of both second hydraulic cylinders (9) is provided with a second fixing member (10). The two second fixing members (10) are respectively hinged with clamping crank arms (11). The two clamping crank arms (11) are respectively sleeved on one end of the two pressure plate shaft assemblies (8).

6. The enclosed electro-hydraulic double-layer ash discharge valve according to claim 5, characterized in that, The pressure plate shaft assembly (8) includes a pressure plate connecting arm (81) fixedly connected to the lower end face of the pressure plate (7). The lower end of the pressure plate connecting arm (81) is provided with a connecting arm bushing (82). The connecting arm bushing (82) is fitted with a central shaft (83) that penetrates the outer wall of the valve body (1). A bearing seat (84) is provided on the central shaft (83) near the outer wall of the valve body (1). The bearing seat (84) is fixedly connected to the outer wall of the valve body (1). The clamping crank arm (11) is sleeved on one end of the central shaft (83).

7. The enclosed electro-hydraulic double-layer ash discharge valve according to claim 4, characterized in that, The first hydraulic component (22) also includes a first limit switch (222) and a second limit switch (223) arranged at left and right intervals. The slide valve plate (43) is provided with a slide valve limit plate (430) that contacts the first limit switch (222) or the second limit switch (223) during reciprocating sliding.

8. The enclosed electro-hydraulic double-layer ash discharge valve according to claim 6, characterized in that, Both the second hydraulic assembly (23) and the third hydraulic assembly (24) include a third limit switch (12) and a fourth limit switch (13) spaced vertically. A pressure plate limiting plate (14) is sleeved on one end of the central shaft (83) near the clamping crank arm (11) to contact the third limit switch (12) or the fourth limit switch (13). When the central shaft (83) rotates, it causes the pressure plate limiting plate (14) to rotate and touch the third limit switch (12) or the fourth limit switch (13), so that the pressure plate (7) opens or closes the first ash inlet (101) and / or the second ash inlet (103).

9. The enclosed electro-hydraulic double-layer ash discharge valve according to claim 3, characterized in that, Both the first ash inlet (101) and the second ash inlet (103) are provided with a ring cylinder (15) connected to the inner surface of the top wall of the valve body (1) near the upper end face of the pressure plate (7). A sealing rubber ring (16) is provided on the outer side wall of the ring cylinder (15), and a rubber ring clamp (17) is provided on the outer side wall of the sealing rubber ring (16).

10. The enclosed electro-hydraulic double-layer ash discharge valve according to claim 6, characterized in that, The pressure plate connecting arm (81) includes a flange (810) fixedly connected to the pressure plate (7). A vertical connecting arm (811) is fitted inside the flange (810). The top of the vertical connecting arm (811) is provided with a hemispherical protrusion (812). An elastic element (813) is provided on the hemispherical protrusion (812). The lower end face of the pressure plate (7) is provided with a groove (71) that matches the hemispherical protrusion (812). The elastic element (813) is located between the groove (71) and the hemispherical protrusion (812). The lower end of the vertical connecting arm (811) is fixedly connected to one end of the connecting arm bushing (82).

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