Double-sealing safety protection device of hydraulic shutoff door and using method of double-sealing safety protection device

Abstract

The invention provides a double-sealing safety protection device for a hydraulic shutoff door and a using method thereof, and belongs to the technical field of hydraulic shutoff doors, the double-sealing safety protection device comprises a discharge port, mounting arms are fixedly connected to the bottoms of the two sides of the discharge port, a movable block is arranged on one side of each mounting arm, a hydraulic rod is fixedly connected to one side of each movable block, and the hydraulic rod is fixedly connected to the other side of each movable block. One end of the hydraulic rod is movably connected with a connecting frame, and the top of the connecting frame is fixedly connected with a door plate. Aiming at the impact problems of high-temperature slag material impact and large coke slag falling, the device is provided with a buffer mechanism, when coke slag impact force enables a buffer plate to move downwards, a movable rod drives a movable disc to extrude a buffer spring, meanwhile, a piston rod pushes a piston head to extrude gas in a fixed pipe, and the gas in the fixed pipe is compressed through air pressure damping formed by the small inner diameter of a vent hole. The buffer spring is matched to buffer impact force together, local deformation and weld joint cracking of the door body due to impact are avoided, tight closing of the door body is guaranteed, and the sealing effect is prevented from being damaged and the slag leakage risk is prevented.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of hydraulic shut-off doors, and particularly relates to a double-sealing safety protection device for a hydraulic shut-off door and a use method thereof. BACKGROUND

[0002] The hydraulic shut-off door is a core equipment in a boiler slag discharge system, is mainly installed at a slag discharge port at the bottom of a boiler, and is used for cutting off a channel between the slag discharge port and a downstream slag conveying equipment when the boiler is overhauled, the slag discharge system fails or the boiler is urgently stopped, preventing high-temperature slag and flue gas from leaking, avoiding air from flowing back into a furnace to affect a balance of a negative pressure of the boiler, and guaranteeing safety of system overhaul and stable operation of the boiler. For example, the utility model with the patent announcement number 202222458606.2 discloses a hydraulic shut-off door for a boiler slag discharge port, and the technical scheme points are as follows: a slag discharge pipe, a bottom end of the slag discharge pipe is symmetrically connected with a shut-off door through rotation, the shut-off door is connected with both sides of the slag discharge pipe through a rotating support, the utility model injects air into a piston cylinder through an air inlet, moves the piston to the lower side of the piston cylinder, controls the hydraulic rod to be extended or retracted through the hydraulic oil pipe, the hydraulic rod drives the shut-off door to rotate, the shut-off door is synchronously rotated through a linkage mechanism, the pressure in the hydraulic oil pipe of a certain hydraulic rod is too large, at this time, the hydraulic oil in the hydraulic oil pipe enters the inside of the piston cylinder through a shunt pipe, the air in the piston cylinder above the piston is compressed, after the shut-off door is rotated, the piston pushes the hydraulic oil back to the hydraulic oil pipe under the air pressure, the hydraulic oil pipe is divided by the piston cylinder, the shut-off door can be synchronously rotated, and damage caused by the pressure of a certain hydraulic rod being too large is avoided. However, the special working condition of the slag discharge port at the bottom of the boiler makes the defects of the existing hydraulic shut-off door more prominent. First, the existing shut-off door generally adopts a single rubber sealing strip sealing structure, and the slag discharge port is not only continuously washed and rubbed by high-temperature slag, but also eroded by corrosive components (such as sulfides and nitrogen oxides) in flue gas. The rubber sealing strip is prone to accelerated aging, hardening and cracking under high temperature, and is quickly worn out under the impact and friction of slag, and loses sealing performance in a short time. Once the sealing fails, high-temperature flue gas will leak from the gap between the door body and the slag discharge port, causing the temperature of the on-site environment to rise and harmful gas to diffuse, threatening the health of workers. If the negative pressure of the boiler fluctuates, air from the outside may also flow back into the furnace through the gap, damaging the stability of combustion, and even causing the risk of explosion in the furnace. Secondly, the hydraulic closing door at the slag outlet needs to withstand multiple external force impacts: on the one hand, the high-temperature slag falling will cause a violent impact on the door body, especially when the slag is clumped, the impact force can reach several thousand Newton in an instant; on the other hand, during the operation of the boiler, the phenomenon of "coking and coking" may occur, and when the large block of coke slag falls, it will cause a concentrated load impact on the door body. The door body of the existing closing door is mostly a welded structure of ordinary steel plate, lacks targeted strengthening design, and is easy to deform locally and crack the weld under the above impact, resulting in that the door body cannot be tightly closed, further aggravating the leakage problem, and even a safety accident of slag leakage may be caused due to the rupture of the door body; Furthermore, the boiler slag discharge system has a very high requirement for the emergency capability of the closing door in case of failure. If the door body cannot be reliably locked when power failure or hydraulic system failure occurs, the high-temperature slag accumulated at the slag outlet may push the door body to open by itself under the action of gravity, and a large amount of slag suddenly discharged will bury the downstream equipment and block the slag conveying channel, causing not only equipment damage but also shutdown for cleaning, resulting in huge production loss. Therefore, we provide a hydraulic closing door double-sealing safety protection device to solve the above problems. SUMMARY

[0003] Based on the problems existing in the prior art, the present application provides a hydraulic closing door double-sealing safety protection device and its use method, which is suitable for use in a boiler slag discharge system.

[0004] In order to achieve the above purpose, the present application adopts the following technical scheme: a hydraulic closing door double-sealing safety protection device, comprising a discharge port, the bottoms of the two sides of the discharge port are fixedly connected with mounting arms, one side of the mounting arm is provided with a movable block, one side of the movable block is fixedly connected with a hydraulic rod, one end of the hydraulic rod is movably connected with a connecting frame, the top of the connecting frame is fixedly connected with a door plate, a sealing assembly is arranged between the door plates, the bottoms of the two sides of the discharge port are provided with locking assemblies, the top of the door plate is provided with a buffer protection assembly, the sealing assembly comprises a groove, the groove is formed in one side of the door plate, one side of the inner cavity of the groove is fixedly connected with a sealing spring, one end of the sealing spring is fixedly connected with a connecting block, one side of the connecting block is fixedly connected with a sealing gasket, the locking assembly comprises an arc-shaped plate, one side of the arc-shaped plate is fixedly connected with the surface of the door plate, arc-shaped grooves are formed in the bottoms of the two sides of the inner cavity of the discharge port, one side of the arc-shaped plate is fixedly connected with a rubber plate, the bottoms of the two sides of the discharge port are fixedly connected with fixed shells, one side of the inner cavity of the fixed shell is fixedly connected with a return spring, one end of the return spring is fixedly connected with a sealing plug, one side of the sealing plug is fixedly connected with a push-pull rod.

[0005] Preferably, the buffer protection assembly comprises a buffer groove opened at the top of the door plate, one side of the buffer groove cavity is fixedly connected with a fixed tube, the inner cavity of the fixed tube is movably connected with a piston rod, one end of the piston rod is fixedly connected with a moving disc, one side of the moving disc is fixedly connected with a buffer spring, the side of the moving disc away from the buffer spring is movably connected with a movable rod, the end of the movable rod away from the moving disc is movably connected with a buffer plate, the top of the buffer plate is extruded to move downward, the buffer plate moving downward drives one end of the movable rod to move, the other end of the movable rod drives the moving disc to move, the moving disc moving extrudes the buffer spring, and at the same time drives the piston rod and the piston head at one end of the piston rod to move in the inner cavity of the fixed tube, so as to extrude the gas in the inner cavity of the fixed tube, the gas in the inner cavity of the fixed tube is extruded and discharged from the air vent, and due to the small inner diameter of the two air vents, the gas discharge speed is slow, thereby forming a gas pressure damping effect, and the buffer spring buffers the impact force on the top of the buffer plate, avoiding the impact force affecting the sealing effect of the door body.

[0006] Preferably, the top and bottom of the fixed tube are provided with air vents, the side of the buffer plate away from the movable rod is in contact with the inner wall of the discharge port, the air vents at the top and bottom of the fixed tube enable the gas in the inner cavity of the fixed tube to be extruded and discharged, and the external air can slowly enter the inner cavity of the fixed tube through the air vents, so that the fixed tube forms a damping accessory.

[0007] Preferably, the bottom of the front and back of the discharge port is fixedly connected with a blocking frame, one side of the blocking frame is fixedly connected with a sealing strip, and when the two door plates are completely closed, the front and back of the two door plates are tightly pressed against the sealing strip on one side of the blocking frame, so as to improve the sealing between the front and back of the door plate and the discharge port.

[0008] Preferably, the bottom of the door plate is fixedly connected with a magnetic attraction strip, the top of the magnetic attraction strip is in contact with the bottom of the sealing gasket, and the two magnetic attraction strips attract each other when the door plates are completely closed, so as to limit and fix the side of the two door plates in contact, and improve the stability of the door plates when closed.

[0009] Preferably, one side of the top of the door plate is provided with a sealing groove, the bottom of the sealing groove cavity is fixedly connected with a buffer strip, the top of the sealing groove cavity is movably connected with a limiting plate, the top of the limiting plate is fixedly connected with the bottom of the buffer plate, and the limiting plate moves in the inner cavity of the sealing groove when the buffer plate moves, and the limiting plate extrudes the buffer strip when moving in the inner cavity of the sealing groove, the buffer strip is deformed after being extruded, and the deformation generates a reverse elastic force, so as to form an elastic resistance on the bottom of the buffer plate through the limiting plate, and further improve the buffering performance of the buffer plate.

[0010] Preferably, the bottom of the discharge port is provided with a semicircular groove on both sides, and the top of the door plate is fixedly connected with a semicircular strip on one side, the size of the semicircular strip is matched with the size of the inner cavity of the semicircular groove, and the semicircular strip is clamped into the inner cavity of the semicircular groove when the door plate is completely closed, so that the sealing and limiting structure formed by the semicircular groove and the semicircular strip can further improve the connection and sealing between the door plate and the discharge port.

[0011] Preferably, one end of the piston rod is fixedly connected with a piston head, the surface of the piston head is in contact with the inner wall of the fixed tube, and the surface of the piston head is in complete contact with the inner cavity of the fixed tube. When the piston head moves in the inner cavity of the fixed tube, the good sealing performance of the contact surface will generate air pressure.

[0012] A method for using a double-sealing safety protection device of a hydraulic shut-off door, comprising the following steps: a. opening the hydraulic rods, and moving the door plates at one end of the two hydraulic rods through the telescopic shafts, until the two door plates are parallel to the opening inner cavity of the bottom of the discharge port; b. when the two door plates are completely closed, the two sealing gaskets on one side of the door plate move reversely after being pressed against each other, the reverse movement of the sealing gaskets drives the connecting block to move and press the sealing spring, the elastic force of the sealing spring is generated by the compression deformation, so that the two sealing gaskets are tightly pressed against each other, and at the same time, the front and back surfaces of the door plate are tightly contacted with the sealing strips on one side of the blocking frame, so as to improve the sealing between the door plate and the discharge port through double sealing; c. when the door plate is closed, the arc-shaped plate on one side of the top of the door plate is inserted into the inner cavity of the arc-shaped through groove on the surface of the discharge port, and when the door plate drives the arc-shaped plate to move in the inner cavity of the arc-shaped through groove, the rubber plate on one side of the arc-shaped plate moves accordingly, and since the surface of the rubber plate is tightly attached to the inner wall of the arc-shaped through groove, the inner cavity of the arc-shaped through groove will generate air pressure when the rubber plate moves, the air pressure drives the sealing block to move towards one side of the fixed shell, and the movement of the sealing block will press the return spring, when the door plate is completely closed, the rubber plate stops moving, the sealing block rebounds under the action of external air pressure to reseal one side of the arc-shaped through groove, and the inner cavity of the arc-shaped through groove is resealed in cooperation with the rubber plate. Even if the hydraulic rod fails, the door plate will not be easily opened. When the door plate needs to be opened, pull the push-pull rod, and the push-pull rod drives the sealing block to move out of the inner cavity of the arc-shaped through groove, so as to remove the sealing environment of the inner cavity of the arc-shaped through groove, and the hydraulic rod can drive the door plate to open; d. When a large piece of slag falls from the discharge port, the impact force of the falling slag will cause the buffer plate to move downward, and the downward movement of the buffer plate will drive one end of the movable rod to move, and the other end of the movable rod will drive the movable plate to move. The movement of the movable plate will squeeze the buffer spring, and at the same time drive the piston rod and the piston head at one end of it to move in the inner cavity of the fixed tube, thereby squeezing the gas in the inner cavity of the fixed tube. The gas in the inner cavity of the fixed tube is squeezed and discharged from the vent hole. Since the inner diameter of the two vent holes is small, the gas discharge speed is slow, thereby forming an air pressure damping effect, and cooperating with the buffer spring to buffer the impact force on the top of the buffer plate, so as to avoid the impact force affecting the sealing effect of the door body.

[0013] Compared with the prior art, the advantages and positive effects of the hydraulic shut-off door double-sealing safety protection device of the present invention are: 1. The present invention improves the sealing performance through a double sealing structure. The sealing gaskets on one side of the door panel are pressed against each other by the elastic force of the sealing spring. At the same time, the front and back sides of the door panel are in close contact with the sealing strip on one side of the retaining frame, which can resist the erosion of high-temperature slag at the slag discharge port and the wear of the seals caused by flue gas corrosion, effectively avoid the leakage of high-temperature flue gas and the diffusion of harmful gases caused by sealing failure, and prevent the backflow of external air into the furnace, thereby protecting the health of on-site personnel and the stability of boiler combustion.

[0014] 2. The present invention has a dual emergency design of fault locking and convenient opening. When the door panel is closed, the arc plate, rubber plate and sealing block cooperate to form a sealed environment for the arc groove. Even if the hydraulic system fails or the power is cut off, the door panel will not open easily, which can prevent high-temperature slag from leaking out and burying equipment and blocking the passage. When it needs to be opened, it is only necessary to pull the push-pull rod to release the seal, and it can be opened normally through the hydraulic rod, taking into account both fault safety and operational convenience, and reducing downtime losses.

[0015] 3. To address the impact problems caused by high-temperature slag collisions and falling large pieces of coke slag, the present invention provides a buffer mechanism. When the impact force of the coke slag causes the buffer plate to move downward, the movable rod drives the movable disk to squeeze the buffer spring. At the same time, the piston rod pushes the piston head to squeeze the gas in the fixed tube. The air pressure damping formed by the small inner diameter of the vent hole is used in conjunction with the buffer spring to buffer the impact force, thereby avoiding local deformation of the door body and cracking of the weld due to impact, ensuring that the door body is tightly closed, and preventing damage to the sealing effect and the risk of slag leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A structural perspective diagram according to the present invention; Figure 2 is a bottom view schematic diagram according to the present invention; Figure 3 It is a cross-sectional schematic diagram of the discharge port according to the present invention; Figure 4 A schematic cross-sectional view according to the present invention; Figure 5According to the present invention Figure 4 A partial enlarged schematic diagram of point A in the middle; Figure 6 A partial cross-sectional schematic diagram according to the present invention; Figure 7 According to the present invention Figure 6 A partial enlarged schematic diagram of point B in the middle; Figure 8 Schematic diagram of the partial structure of the middle buffer protection component according to the present invention; Figure 9 Schematic diagram of the structure of the door panel according to the present invention.

[0017] Figure 10 According to the present invention Figure 9 A partial enlarged schematic diagram of point C in the middle.

[0018] Figure 11 It is a schematic diagram of the local structure of the discharge port according to the present invention.

[0019] Explanation of the reference numerals in the accompanying drawings: 1. discharge port; 2. mounting arm; 3. movable block; 4. hydraulic rod; 5. connecting frame; 6. door panel; 7. sealing assembly; 8. locking assembly; 9. buffer protection assembly; 701. groove; 702. sealing spring; 703. connecting block; 704. sealing gasket; 801. arc plate; 802. arc through groove; 803. rubber plate; 804. fixed shell; 805. return spring; 806. sealing block; 807. push-pull rod; 901. buffer groove; 902. fixed tube; 903. piston rod; 904. movable disk; 905. buffer spring; 906. movable rod; 907. buffer plate; 10. retaining frame; 11. piston head. DETAILED DESCRIPTION

[0020] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.

[0021] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0022] The hydraulic shut-off door double sealing safety protection device adopts the technical scheme: a hydraulic shut-off door double sealing safety protection device, which comprises a discharge port 1, mounting arms 2 fixedly connected to the bottoms on both sides of the discharge port 1, movable blocks 3 arranged on one side of the mounting arms 2, hydraulic rods 4 fixedly connected to one side of the movable blocks 3, connecting racks 5 movably connected to one end of the hydraulic rods 4, door plates 6 fixedly connected to the top of the connecting racks 5, sealing assemblies 7 arranged between the door plates 6, locking assemblies 8 arranged on the bottoms on both sides of the discharge port 1, and buffer protection assemblies 9 arranged on the top of the door plates 6.

[0023] The above technical scheme has the following advantages: the two hydraulic rods 4 drive the door plates 6 at the ends of the hydraulic rods 4 to move, so that the door plates 6 can be opened and closed; the locking assemblies 8 can lock the closed door plates 6; when the hydraulic rods 4 fail, the two locking assemblies 8 can fix the door plates 6, so that the door plates 6 cannot be opened to cause leakage; the sealing assemblies 7 can greatly improve the sealing performance between the two door plates 6 through the extrusion sealing effect of the sealing springs 702 and the sealing pads 704; when large pieces of coke fall in the discharge port 1, the large pieces of coke will impact on the buffer protection assemblies 9, the buffer protection assemblies 9 can buffer the impact force of the falling coke, so that the coke cannot directly fall on the door plates 6 to impact the door plates 6 and damage the sealing performance of the door plates 6.

[0024] In addition, the buffer protection assemblies 9 comprise buffer grooves 901 arranged on the top of the door plates 6, fixed pipes 902 fixedly connected to one side of the buffer grooves 901, piston rods 903 movably connected to the inner cavities of the fixed pipes 902, moving discs 904 fixedly connected to one end of the piston rods 903, buffer springs 905 fixedly connected to one side of the moving discs 904, movable rods 906 movably connected to the side, away from the buffer springs 905, of the moving discs 904, and buffer plates 907 movably connected to the ends, away from the moving discs 904, of the movable rods 906.

[0025] Further, the top and bottom of the fixed tube 902 are provided with air holes, and the side of the buffer plate 907 away from the movable rod 906 is in contact with the inner wall of the discharge port 1.

[0026] Preferably, the top of the buffer plate 907 moves downward after being pressed, and the downward movement of the buffer plate 907 drives one end of the movable rod 906 to move, and the other end of the movable rod 906 drives the moving disc 904 to move, which extrudes the buffer spring 905 and drives the piston rod 903 and the piston head 11 at one end of the piston rod 903 to move in the inner cavity of the fixed tube 902, so as to extrude the gas in the inner cavity of the fixed tube 902, and the gas in the inner cavity of the fixed tube 902 is discharged from the air holes due to the small inner diameter of the air holes, so that the gas is discharged at a slow speed, thereby forming a gas pressure damping effect, and the impact force on the top of the buffer plate 907 is buffered by the buffer spring 905, so as to avoid the impact force from affecting the sealing effect of the door body. The air holes at the top and bottom of the fixed tube 902 enable the gas in the inner cavity of the fixed tube 902 to be discharged after being extruded, and the external air can enter the inner cavity of the fixed tube 902 through the air holes at a slow speed, so that the fixed tube 902 forms a damping accessory.

[0027] In another embodiment, the bottom of the front and back of the discharge port 1 is fixedly connected with a blocking frame 10, and one side of the blocking frame 10 is fixedly connected with a sealing strip.

[0028] Further, the bottom of the door plate 6 is fixedly connected with a magnetic attraction strip, and the top of the magnetic attraction strip is in contact with the bottom of the sealing gasket 704.

[0029] With the complete closing of the two door plates 6, the front and back of the two door plates 6 are tightly pressed against the sealing strip on one side of the blocking frame 10, so as to improve the sealing between the front and back of the door plate 6 and the discharge port 1.

[0030] The two magnetic attraction strips are attracted to each other with the complete closing of the door plate 6, and the side of the two door plates 6 in contact is fixedly positioned, so as to improve the stability of the door plate 6 when it is closed.

[0031] Preferably, one side of the top of the door plate 6 is provided with a sealing groove, the bottom of the inner cavity of the sealing groove is fixedly connected with a buffer strip, the top of the inner cavity of the sealing groove is movably connected with a limiting plate, and the top of the limiting plate is fixedly connected with the bottom of the buffer plate 907.

[0032] With the above technical solution, the limiting plate moves in the inner cavity of the sealing groove with the movement of the buffer plate 907, and the limiting plate extrudes the buffer strip when moving in the inner cavity of the sealing groove. The buffer strip deforms after being extruded, and the deformation generates a reverse elastic force, so as to form an elastic resistance on the bottom of the buffer plate 907 through the limiting plate, and further improve the buffering performance of the buffer plate 907.

[0033] In addition, the bottom of the discharge port 1 is provided with a semicircular groove on both sides, and the top of the door plate 6 is fixedly connected with a semicircular strip on one side, and the size of the semicircular strip is matched with the size of the inner cavity of the semicircular groove.

[0034] On the other hand, one end of the piston rod 903 is fixedly connected with a piston head 11, and the surface of the piston head 11 is in contact with the inner wall of the fixed tube 902.

[0035] Further, the semicircular strip is clamped into the inner cavity of the semicircular groove when the door plate 6 is completely closed, and the sealing and limiting structure composed of the semicircular groove and the semicircular strip can further improve the connection and sealing between the door plate 6 and the discharge port 1.

[0036] The surface of the piston head 11 is in complete contact with the inner cavity of the fixed tube 902, and when the piston head 11 moves in the inner cavity of the fixed tube 902, due to the good sealing performance of the contact surface, air pressure is generated.

[0037] The hydraulic shut-off door double-sealing safety protection device and the use method thereof will be further described below in combination with specific embodiments.

[0038] As shown in Figures 1-11 , the present application provides a hydraulic shut-off door double-sealing safety protection device, which comprises a discharge port 1, the bottom of both sides of the discharge port 1 is fixedly connected with a mounting arm 2, one side of the mounting arm 2 is provided with a movable block 3, one side of the movable block 3 is fixedly connected with a hydraulic rod 4, one end of the hydraulic rod 4 is movably connected with a connecting frame 5, the top of the connecting frame 5 is fixedly connected with a door plate 6, the door plate 6 is provided with a sealing assembly 7 between both sides, the bottom of both sides of the discharge port 1 is provided with a locking assembly 8, the top of the door plate 6 is provided with a buffer protection assembly 9, the sealing assembly 7 comprises a groove 701, the groove 701 is provided on one side of the door plate 6, one side of the inner cavity of the groove 701 is fixedly connected with a sealing spring 702, one end of the sealing spring 702 is fixedly connected with a connecting block 703, one side of the connecting block 703 is fixedly connected with a sealing gasket 704, the locking assembly 8 comprises an arc-shaped plate 801, one side of the arc-shaped plate 801 is fixedly connected with the surface of the door plate 6, the bottom of both sides of the inner cavity of the discharge port 1 is provided with an arc-shaped through slot 802, one side of the arc-shaped plate 801 is fixedly connected with a rubber plate 803, the bottom of both sides of the discharge port 1 is fixedly connected with a fixed shell 804, one side of the inner cavity of the fixed shell 804 is fixedly connected with a return spring 805, one end of the return spring 805 is fixedly connected with a sealing plug 806, one side of the sealing plug 806 is fixedly connected with a push-pull rod 807.

[0039] The specific settings and effects of the sealing assembly 7, the locking assembly 8 and the buffer protection assembly 9 will be described in detail below.

[0040] As shown in Figure 9 and Figure 10As shown, the sealing assembly 7 includes a groove 701 opened on one side of the door plate 6, one side of the inner cavity of the groove 701 is fixedly connected with a sealing spring 702, one end of the sealing spring 702 is fixedly connected with a connecting block 703, one side of the connecting block 703 is fixedly connected with a sealing gasket 704.

[0041] The effect achieved by the whole sealing assembly 7 is that, with the complete closing of the two door plates 6, the two sealing gaskets 704 on one side of the door plate 6 are reversely moved after being extruded, the reverse movement of the sealing gaskets 704 drives the connecting block 703 to move and extrude the sealing spring 702, the sealing spring 702 is deformed under pressure to generate elastic force, so that the two sealing gaskets 704 are tightly pressed against each other, at the same time, the front and back surfaces of the door plate 6 are tightly contacted with the sealing strips on one side of the blocking frame 10, and the sealing property between the door plate 6 and the discharge port 1 is improved through double sealing.

[0042] As shown in Figure 6 and Figure 7 , the locking assembly 8 includes an arc-shaped plate 801, one side of the arc-shaped plate 801 is fixedly connected with the surface of the door plate 6, the bottoms of the two sides of the inner cavity of the discharge port 1 are both provided with an arc-shaped through slot 802, one side of the arc-shaped plate 801 is fixedly connected with a rubber plate 803, the bottoms of the two sides of the discharge port 1 are both fixedly connected with a fixed shell 804, one side of the inner cavity of the fixed shell 804 is fixedly connected with a return spring 805, one end of the return spring 805 is fixedly connected with a sealing plug 806, one side of the sealing plug 806 is fixedly connected with a push-pull rod 807.

[0043] The effect achieved by the whole locking assembly 8 is that, with the closing of the door plate 6, the arc-shaped plate 801 on one side of the top of the door plate 6 is inserted into the inner cavity of the arc-shaped through slot 802 on the surface of the discharge port 1, with the movement of the arc-shaped plate 801 in the inner cavity of the arc-shaped through slot 802 driven by the door plate 6, the rubber plate 803 on one side of the arc-shaped plate 801 moves accordingly, since the surface of the rubber plate 803 is tightly attached to the inner wall of the arc-shaped through slot 802, with the movement of the rubber plate 803, the inner cavity of the arc-shaped through slot 802 generates air pressure, the air pressure drives the sealing plug 806 to move towards one side of the fixed shell 804, the movement of the sealing plug 806 extrudes the return spring 805, when the door plate 6 is completely closed, the rubber plate 803 stops moving, the sealing plug 806 rebounds under the action of external air pressure to re-plug one side of the arc-shaped through slot 802, cooperated with the rubber plate 803 to re-form a sealed environment in the inner cavity of the arc-shaped through slot 802, even if the hydraulic rod 4 fails, the door plate 6 will not be easily opened, when the door plate 6 needs to be opened, the push-pull rod 807 is pulled, the push-pull rod 807 drives the sealing plug 806 to move out of the inner cavity of the arc-shaped through slot 802, the sealed environment in the inner cavity of the arc-shaped through slot 802 is removed, and the hydraulic rod 4 can drive the door plate 6 to open.

[0044] As shown in Figure 3 , Figure 4 and Figure 9As shown, the buffer protection assembly 9 comprises a buffer groove 901 opened at the top of the door plate 6, one side of the inner cavity of the buffer groove 901 is fixedly connected with a fixed tube 902, the inner cavity of the fixed tube 902 is movably connected with a piston rod 903, one end of the piston rod 903 is fixedly connected with a moving disc 904, one side of the moving disc 904 is fixedly connected with a buffer spring 905, the side of the moving disc 904 away from the buffer spring 905 is movably connected with a movable rod 906, and the end of the movable rod 906 away from the moving disc 904 is movably connected with a buffer plate 907.

[0045] The effect achieved by the whole buffer protection assembly 9 is that when the large coke slag in the discharge port 1 falls, the impact force of the coke slag falling will cause the buffer plate 907 to move downward, the buffer plate 907 moving downward will drive one end of the movable rod 906 to move, the other end of the movable rod 906 will drive the moving disc 904 to move, the moving disc 904 moving will extrude the buffer spring 905, and at the same time, the piston rod 903 and the piston head 11 at one end of the piston rod 903 will move in the inner cavity of the fixed tube 902, so as to extrude the gas in the inner cavity of the fixed tube 902, and the gas in the inner cavity of the fixed tube 902 is extruded and discharged from the air hole, and since the inner diameters of the two air holes are small, the gas discharge speed is slow, thereby forming the air pressure damping effect, and the impact force on the top of the buffer plate 907 is buffered by the buffer spring 905, so as to avoid the impact force affecting the sealing effect of the door body.

[0046] The working principle of the hydraulic shut-off door double-sealing safety protection device is as follows: 1. open the hydraulic rod 4, and the telescopic shafts of the two hydraulic rods 4 drive the door plates 6 at one end to move until the two door plates 6 are parallel to the opening inner cavity of the discharge port 1 hopper bottom; 2. with the complete closure of the two door plates 6, the two sealing gaskets 704 on one side of the door plate 6 move reversely after being extruded, the reverse movement of the sealing gaskets 704 will drive the connecting block 703 to move and extrude the sealing spring 702, the sealing spring 702 is deformed under pressure to generate elastic force, so as to make the two sealing gaskets 704 abut against each other, and at the same time, the front and back surfaces of the door plate 6 abut against and contact the sealing strips on one side of the blocking frame 10, so as to improve the sealing between the door plate 6 and the discharge port 1 through double sealing; 3. As the door panel 6 is closed, the arc plate 801 on the top side of the door panel 6 is inserted into the inner cavity of the arc groove 802 on the surface of the discharge port 1. As the door panel 6 drives the arc plate 801 to move in the inner cavity of the arc groove 802, the rubber plate 803 on one side of the arc plate 801 moves accordingly. Since the surface of the rubber plate 803 is in close contact with the inner wall of the arc groove 802, as the rubber plate 803 moves, air pressure is generated in the inner cavity of the arc groove 802. The air pressure pushes the sealing block 806 to move toward the side of the fixed shell 804. The movement of the sealing block 806 squeezes the return spring 806. 05. When the door panel 6 is completely closed, the rubber plate 803 stops moving, and the sealing block 806 rebounds under the action of external air pressure to block one side of the arc groove 802 again, cooperating with the rubber plate 803 to re-form a sealed environment in the inner cavity of the arc groove 802. Even if the hydraulic rod 4 fails, the door panel 6 will not be easily opened. When the door panel 6 needs to be opened, the push-pull rod 807 is pulled, and the push-pull rod 807 drives the sealing block 806 to move out of the inner cavity of the arc groove 802, releasing the sealed environment of the inner cavity of the arc groove 802, and the hydraulic rod 4 can drive the door panel 6 to open; 4. When a large piece of slag falls from the discharge port 1, the impact force of the falling slag will cause the buffer plate 907 to move downward. The downward movement of the buffer plate 907 will drive one end of the movable rod 906 to move, and the other end of the movable rod 906 will drive the movable disk 904 to move. The movement of the movable disk 904 will squeeze the buffer spring 905, and at the same time drive the piston rod 903 and the piston head 11 at one end of the piston rod 903 to move in the inner cavity of the fixed tube 902, thereby squeezing the gas in the inner cavity of the fixed tube 902. The gas in the inner cavity of the fixed tube 902 is squeezed and discharged from the vent hole. Since the inner diameter of the two vent holes is small, the gas discharge speed is slow, thereby forming an air pressure damping effect, and cooperating with the buffer spring 905 to buffer the impact force on the top of the buffer plate 907, to prevent the impact force from affecting the sealing effect of the door body.

[0047] The above description is merely a preferred embodiment of the present invention and does not limit the present invention in any other form. Any technician familiar with the present invention may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes for application in other fields. However, any simple modification, equivalent change and modification of the above embodiment made according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A double-sealed safety protection device for a hydraulic shut-off door, comprising a discharge port (1), characterized in that: The bottoms of both sides of the discharge port (1) are fixedly connected to mounting arms (2), one side of the mounting arms (2) is provided with a movable block (3), one side of the movable block (3) is fixedly connected to a hydraulic rod (4), one end of the hydraulic rod (4) is movably connected to a connecting frame (5), the top of the connecting frame (5) is fixedly connected to a door panel (6), a sealing assembly (7) is provided between the door panels (6), the bottoms of both sides of the discharge port (1) are provided with locking assemblies (8), and the top of the door panel (6) is provided with a buffer protection assembly (9); The sealing assembly (7) comprises a groove (701), the groove (701) being formed on one side of the door panel (6), a sealing spring (702) being fixedly connected to one side of the inner cavity of the groove (701), one end of the sealing spring (702) being fixedly connected to a connecting block (703), and one side of the connecting block (703) being fixedly connected to a sealing gasket (704); The locking assembly (8) includes an arc-shaped plate (801), one side of the arc-shaped plate (801) is fixedly connected to the surface of the door panel (6), the bottoms of both sides of the inner cavity of the discharge port (1) are provided with arc-shaped through grooves (802), one side of the arc-shaped plate (801) is fixedly connected to a rubber plate (803), the bottoms of both sides of the discharge port (1) are fixedly connected to a fixed shell (804), one side of the inner cavity of the fixed shell (804) is fixedly connected to a return spring (805), one end of the return spring (805) is fixedly connected to a sealing block (806), and one side of the sealing block (806) is fixedly connected to a push-pull rod (807).

2. A double-sealed safety protection device for a hydraulic shut-off door according to claim 1, characterized in that: The buffer protection assembly (9) comprises a buffer groove (901), wherein the buffer groove (901) is opened at the top of the door panel (6), a fixed tube (902) is fixedly connected to one side of the inner cavity of the buffer groove (901), a piston rod (903) is movably connected to the inner cavity of the fixed tube (902), one end of the piston rod (903) is fixedly connected to a movable disk (904), one side of the movable disk (904) is fixedly connected to a buffer spring (905), a movable rod (906) is movably connected to the side of the movable disk (904) away from the buffer spring (905), and one end of the movable rod (906) away from the movable disk (904) is movably connected to a buffer plate (907).

3. The double-sealed safety device for a hydraulic shut-off door according to claim 2, characterized in that: The top and bottom of the fixed tube (902) are both provided with ventilation holes, and the side of the buffer plate (907) away from the movable rod (906) contacts the inner wall of the discharge port (1).

4. The double-sealed safety device for a hydraulic shutoff door according to claim 1, characterized in that: The bottoms of the front and back sides of the discharge port (1) are both fixedly connected to a retaining frame (10), and one side of the retaining frame (10) is fixedly connected to a sealing strip.

5. The double-sealed safety protection device for a hydraulic shut-off door according to claim 1, characterized in that: A magnetic strip is fixedly connected to the bottom of the door panel (6), and the top of the magnetic strip contacts the bottom of the sealing gasket (704).

6. The double-sealed safety device for a hydraulic shutoff door according to claim 1, characterized in that: A sealing groove is provided on one side of the top of the door panel (6); a buffer strip is fixedly connected to the bottom of the inner cavity of the sealing groove; a limit plate is movably connected to the top of the inner cavity of the sealing groove; and the top of the limit plate is fixedly connected to the bottom of the buffer plate (907).

7. The double-sealed safety device for a hydraulic shutoff door according to claim 1, characterized in that: Semicircular grooves are provided on both sides of the bottom of the discharge port (1), and a semicircular bar is fixedly connected to one side of the top of the door panel (6), and the size of the semicircular bar is adapted to the size of the inner cavity of the semicircular groove.

8. The double-sealed safety device for a hydraulic shutoff door according to claim 1, characterized in that: An arc-shaped reinforcement plate is fixedly connected to one side of the connecting frame (5), and a side of the arc-shaped reinforcement plate away from the connecting frame (5) is fixedly connected to the surface of the door panel (6).

9. The double-sealed safety device for a hydraulic shutoff door according to claim 2, characterized in that: One end of the piston rod (903) is fixedly connected to a piston head (11), and the surface of the piston head (11) is in contact with the inner wall of the fixed tube (902).

10. A method for using a double-sealed safety device for a hydraulic shutoff door according to any one of claims 1 to 9, characterized in that: The following steps are involved: a. Open the hydraulic rod (4), and the telescopic shafts of the two hydraulic rods (4) respectively drive the door panels (6) at one end thereof to move until the two door panels (6) are parallel to the open inner cavity at the bottom of the discharge port (1); b. As the two door panels (6) are completely closed, the two sealing gaskets (704) on one side of the door panel (6) squeeze each other and move in the opposite direction. The reverse movement of the sealing gasket (704) drives the connecting block (703) to move and squeeze the sealing spring (702). The sealing spring (702) is deformed under pressure to generate elastic force, thereby pressing the two sealing gaskets (704) against each other. At the same time, the front and back sides of the door panel (6) are respectively in close contact with the sealing strip on one side of the retaining frame (10), thereby improving the sealing performance between the door panel (6) and the discharge port (1) through double sealing; c. As the door panel (6) is closed, the arc plate (801) on the top side of the door panel (6) is inserted into the inner cavity of the arc groove (802) on the surface of the discharge port (1). As the door panel (6) drives the arc plate (801) to move in the inner cavity of the arc groove (802), the rubber plate (803) on one side of the arc plate (801) moves accordingly. Since the surface of the rubber plate (803) is in close contact with the inner wall of the arc groove (802), as the rubber plate (803) moves, air pressure is generated in the inner cavity of the arc groove (802). The air pressure pushes the sealing block (806) to move toward one side of the fixed shell (804). The movement of the sealing block (806) squeezes the return spring ( 805), when the door panel (6) is completely closed, the rubber plate (803) stops moving, and the sealing block (806) rebounds under the action of external air pressure to block one side of the arc groove (802) again, and cooperates with the rubber plate (803) to make the inner cavity of the arc groove (802) form a sealed environment again. Even if the hydraulic rod (4) fails, the door panel (6) will not be opened easily. When the door panel (6) needs to be opened, the push-pull rod (807) is pulled, and the push-pull rod (807) drives the sealing block (806) to move out of the inner cavity of the arc groove (802), releasing the sealed environment of the inner cavity of the arc groove (802), and the hydraulic rod (4) can drive the door panel (6) to open; d. When a large piece of slag falls from the discharge port (1), the impact force of the falling slag will cause the buffer plate (907) to move downward. The downward movement of the buffer plate (907) will drive one end of the movable rod (906) to move, and the other end of the movable rod (906) will drive the movable disk (904) to move. The movement of the movable disk (904) will squeeze the buffer spring (905), and at the same time drive the piston rod (903) and the piston head (11) at one end thereof to move in the inner cavity of the fixed tube (902), thereby squeezing the gas in the inner cavity of the fixed tube (902). The gas in the inner cavity of the fixed tube (902) is squeezed and discharged from the vent hole. Since the inner diameters of the two vent holes are small, the gas discharge speed is slow, thereby forming an air pressure damping effect, and cooperating with the buffer spring (905) to buffer the impact force on the top of the buffer plate (907), thereby preventing the impact force from affecting the sealing effect of the door body.

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