Fully-sealed wear-resistant deslagging valve and deslagging system

Abstract

The invention discloses a full-sealed wear-resistant slag discharge valve and a slag discharge system, and relates to the field of valves. The valve plate adopts a double-layer plate design, the elastic piece can provide continuous elastic jacking force for the main valve plate, it is ensured that the main valve plate can make close contact with the first valve deck all the time through the sealing face when the valve is closed, the sealing performance when the valve is closed is ensured, and even under the condition of frequent opening and closing, even if the valve plate sealing face of the valve is slightly abraded, the valve plate sealing face cannot be damaged. The wedge-shaped gate valve can still keep a tight sealing effect, meets internal and external zero leakage when the slag discharge valve is fully closed, does not need frequent maintenance, and solves the problems that an existing wedge-shaped gate valve is unreliable in sealing, prone to abrasion and leakage, short in service life, high in maintenance cost and the like. In addition, due to the double-layer plate combined design of the main valve plate and the supporting plate, the whole valve plate is more compact in structure and suitable for being installed and used in a small space. The slag discharge system comprises the fully-sealed wear-resistant slag discharge valve and has all the characteristics of the slag discharge valve.

Description

Technical Field

[0001] The invention relates to the technical field of valves, and in particular to a fully sealed wear-resistant slag discharge valve and a slag discharge system. Background Art

[0002] In the fully sealed slag discharge system, the coal mill's stone coal discharge port is usually equipped with a slag discharge valve to keep the coal mill temporarily closed when not discharging. The slag discharge valve should be opened intermittently during the operation of the coal mill to ensure that the stone coal is discharged into the slag box through the discharge valve. The slag discharge valve should be flexible to open and close, and there should be no leakage inside or outside when it is fully closed.

[0003] However, in the current slag discharge system, the commonly used slag discharge valve is a wedge-shaped plug valve (also known as a "knife gate valve"), which uses a metal seal and a wedge-shaped block auxiliary structure between the gate and the valve body. However, due to its structural characteristics, the sealing performance of this valve is often not ideal when it leaves the factory; moreover, the frequent opening of the gate is likely to cause rapid wear of the gate sealing surface, which is likely to cause stone coal to jam the gate, causing the gate to close loosely, followed by a large amount of hot air entrained with coal powder leakage, which not only reduces the working efficiency and performance of the coal mill, but may also cause serious harm to on-site personnel and equipment. Therefore, it is usually necessary to maintain, inspect, or even replace the valve every 3 to 6 months, with a short service life and high maintenance costs. Summary of the invention

[0004] The purpose of the present invention is to provide a new type of fully sealed wear-resistant slag discharge valve and a slag discharge system including the fully sealed wear-resistant slag discharge valve, so as to solve the problems of unreliable sealing, easy wear and leakage, short service life, high maintenance and repair costs existing in the above-mentioned existing wedge-shaped plug-in valve.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] In one aspect, the present invention provides a fully sealed wear-resistant slag discharge valve, comprising:

[0007] The valve body comprises a valve cavity, a first valve cover and a second valve cover are respectively arranged on both sides of the valve cavity, a valve body inlet and a valve body outlet are respectively provided on the first valve cover and the second valve cover, and the valve body inlet and the valve body outlet are communicated through the valve cavity;

[0008] A valve plate, which is assembled in the valve cavity, comprises a main valve plate, a supporting plate and an elastic member; the sealing surface of the main valve plate faces the first valve cover and contacts with the first valve cover to form a sliding sealing pair; the supporting plate is located on the side of the main valve plate away from the sealing surface and contacts with the second valve cover to form a sliding pair; the elastic member is connected between the main valve plate and the supporting plate to provide an elastic pressing force for the main valve plate;

[0009] At least one of the main valve plate and the support plate is used to connect an actuator, so that the valve plate can move along a linear opening and closing trajectory and open or close the inlet of the valve body.

[0010] In some embodiments, a ceramic sealing ring is provided between the sealing surface and the first valve cover;

[0011] The ceramic sealing ring is provided on the inner side wall of the first valve cover and is located on the outer ring of the inlet of the valve body; alternatively, the ceramic sealing ring is provided on the sealing surface, and when the sealing surface closes the inlet of the valve body, the ceramic sealing ring is located on the outer ring of the inlet of the valve body.

[0012] In some embodiments, ceramic support bars arranged along the linear opening and closing trajectory are further provided on the inner side wall of the first valve cover, and the ceramic support bars can be in sealing sliding fit with the sealing surface during the movement of the valve plate along the linear opening and closing trajectory.

[0013] In some embodiments, a convex slideway arranged along the linear opening and closing trajectory is further provided on the inner side wall of the second valve cover, and a self-lubricating metal block slidingly adapted to the convex slideway is provided on the side of the support plate facing away from the main valve plate.

[0014] In some embodiments, the valve cavity is integrally formed with the second valve cover, is detachably connected to the first valve cover, and a rubber sealing ring is further provided between the first valve cover and the valve cavity.

[0015] In some embodiments, the support plate is a hollow plate provided with a hollow structure.

[0016] In some embodiments, the cross-sectional area of the outlet of the valve body is not less than the cross-sectional area of the inlet of the valve body, and the vertical projection of the inlet of the valve body on the second valve cover is completely located inside the outlet of the valve body.

[0017] In some embodiments, the elastic member is a die spring, the main valve plate is a circular valve plate, the main valve plate is connected to the support plate by a plurality of the die springs, and the plurality of die springs are evenly distributed along the circumferential direction of the main valve plate.

[0018] In some embodiments, the fully sealed wear-resistant slag discharge valve further includes an actuator, and the actuator is a cylinder, a hydraulic cylinder or an electric telescopic rod; the actuator is arranged outside the valve body, and the telescopic rod of the actuator penetrates through the wall of the valve cavity and is connected to at least one of the main valve plate and the support plate.

[0019] In some embodiments, a shaft seal is formed between the telescopic rod of the actuator and the wall of the valve cavity through a multi-layer V-shaped combined seal.

[0020] On the other hand, the present invention also provides a slag discharging system, in which at least one fully sealed wear-resistant slag discharging valve as described in any one of the above is provided on the slag discharging passage.

[0021] The present invention has achieved the following technical effects compared with the prior art:

[0022] The fully sealed wear-resistant slag discharging valve proposed by the present invention is a plug-type slag discharging valve. Its valve plate adopts a double-layer plate design, and the elastic member can provide a continuous elastic pressing force for the main valve plate, ensuring that the main valve plate can always be in close contact with the first valve cover by using the sealing surface in the valve-closed state, guaranteeing the sealing performance when the valve is closed. Even under the condition of frequent opening and closing, even if the sealing surface of the valve plate of this valve shows slight wear, it can still maintain a tight sealing effect, meeting the requirement of zero leakage inside and outside when the slag discharging valve is fully closed, and without the need for frequent maintenance, solving the problems existing in the existing wedge-shaped plug valve, such as unreliable sealing, easy wear and leakage, low service life, and high maintenance and repair costs. In addition, the double-layer plate combination design of the main valve plate and the support plate makes the entire valve plate structure more compact and suitable for installation in a compact space.

[0023] In some technical solutions disclosed by the present invention, three mold springs of the same specification are evenly distributed between the main valve plate and the support plate, which not only ensures the balance of the overall valve plate structure but also plays a role in keeping the valve plate and the valve body in reliable sealing, realizing the design of a fully enclosed valve structure.

[0024] In some technical solutions disclosed by the present invention, a highly wear-resistant zirconia sealing pair is adopted between the main valve plate and the valve body, making the slag discharging valve have good sealing performance and longer durability.

[0025] In some technical solutions disclosed by the present invention, the shaft seal between the telescopic rod of the actuator and the valve cavity adopts a fully sealed multi-layer combined sealing structure, which is flexible in opening and closing, does not jam, does not wear, does not adopt the packing seal form, avoids the friction of the packing on the telescopic rod during the opening and closing process of the valve plate, thereby reducing the output loss of the actuator and the maintenance amount. At the same time, a fully enclosed structure is also realized.

[0026] In some technical solutions disclosed by the present invention, the slag discharging valve uses a cylinder to drive the opening and closing of the valve. The pneumatic system has reliable sealing, is flexible in opening and closing, has small resistance, has tight sealing and zero leakage inside and outside when fully closed, and zero leakage at the sealing shaft (i.e., the telescopic rod). The whole valve can be leak-free for 3 years and does not require replacement of spare parts in an environment with a long-term temperature of 400°C.

[0027] The slag discharging system disclosed by the present invention includes the above-mentioned fully sealed wear-resistant slag discharging valve and has all the characteristics of the above-mentioned slag discharging valve, which will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0029] Figure 1 Schematic diagram of the overall structure of the fully sealed wear-resistant slag discharge valve disclosed in the embodiment of the present invention;

[0030] Figure 2 Top view schematic diagram of the fully sealed wear-resistant slag discharge valve disclosed in the embodiment of the present invention;

[0031] Figure 3 Front view schematic diagram of the fully sealed wear-resistant slag discharge valve disclosed in the embodiment of the present invention;

[0032] Figure 4 Bottom view schematic diagram of the fully sealed wear-resistant slag discharge valve disclosed in the embodiment of the present invention;

[0033] Figure 5 Cross-sectional structure schematic diagram of the fully sealed wear-resistant slag discharge valve disclosed in the embodiment of the present invention;

[0034] Figure 6 Overall structure schematic diagram of the valve plate disclosed in the embodiment of the present invention;

[0035] Figure 7 Top view schematic diagram of the valve plate disclosed in the embodiment of the present invention;

[0036] Figure 8 Front view schematic diagram of the valve plate disclosed in the embodiment of the present invention;

[0037] Figure 9 Bottom view schematic diagram of the valve plate disclosed in the embodiment of the present invention;

[0038] Figure 10 Cross-sectional structure schematic diagram of the valve plate disclosed in the embodiment of the present invention;

[0039] Figure 11 Assembly schematic diagram of the valve plate and the first valve cover disclosed in the embodiment of the present invention;

[0040] Figure 12 Structure schematic diagram of the first valve cover disclosed in the embodiment of the present invention;

[0041] Figure 13 Assembly schematic diagram of the valve plate and the second valve cover disclosed in the embodiment of the present invention;

[0042] Figure 14 Structure schematic diagram of the second valve cover disclosed in the embodiment of the present invention;

[0043] Figure 15 This is a schematic structural diagram of the multi-layer V-shaped combined seal disclosed in the embodiments of the present invention.

[0044] In the figure, the reference numerals are: 100, fully sealed wear-resistant slag discharge valve;

[0045] 1, valve body; 11, valve cavity; 12, first valve cover; 13, second valve cover; 14, valve body inlet; 15, valve body outlet; 16, ceramic sealing ring; 17, ceramic support bar; 18, convex slideway;

[0046] 2, valve plate; 21, main valve plate; 211, sealing surface; 22, support plate; 221, hollow structure; 23, elastic member; 24, positioning column; 25, positioning hole; 26, self-lubricating metal block;

[0047] 3, actuator;

[0048] 4, rubber sealing ring;

[0049] 5, multi-layer V-shaped combined seal; 51, support ring; 52, pressing ring; 53, sealing ring;

[0050] 6, pin shaft;

[0051] 7, Y-shaped joint;

[0052] 8, alloy sleeve. Specific embodiments

[0053] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

[0054] One of the purposes of the present invention is to provide a new type of fully sealed wear-resistant slag discharge valve to solve the problems of unreliable sealing, easy wear and leakage, low service life, and high maintenance and repair costs existing in the existing wedge gate valve.

[0055] Another purpose of the present invention is to provide a slag discharge system including the above-mentioned fully sealed wear-resistant slag discharge valve.

[0056] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0057] Embodiment 1

[0058] As Figures 1 to 10As shown, this embodiment provides a fully sealed wear-resistant slag discharge valve 100, including a valve body 1 and a valve plate 2. The valve body 1 includes a valve cavity 11. A first valve cover 12 and a second valve cover 13 are respectively arranged on both sides of the valve cavity 11. The first valve cover 12 and the second valve cover 13 are preferably arranged in parallel and spaced apart, so that the valve cavity 11 is flat as a whole, and the slag discharge valve is flat as a whole. A valve body inlet 14 and a valve body outlet 15 are respectively provided on the first valve cover 12 and the second valve cover 13. The valve body inlet 14 and the valve body outlet 15 are connected through the valve cavity 11. Generally, the valve body inlet 14 and the valve body outlet 15 are arranged in alignment. The valve plate 2 is movably assembled in the valve cavity 11. The valve plate 2 includes a main valve plate 21, a support plate 22 and an elastic member 23. The main valve plate 21 is parallel to the first valve cover 12, and the side of the first valve cover 12 facing the first valve cover 12 is used as a sealing surface 211. The sealing surface 211 contacts the first valve cover 12 to form a sliding sealing pair; the support plate 22 is located on the side of the main valve plate 21 away from the sealing surface 211, and the side of the support plate 22 facing the second valve cover 13 contacts the second valve cover 13 to form a sliding pair; the elastic member 23 is connected to the main valve plate 21 and the support plate 22 When the valve plate 2 is installed in the valve cavity 11, the elastic member 23 can provide continuous elastic tightening force for the main valve plate 21, ensuring that the main valve plate 21 can always use the sealing surface 211 to closely contact with the first valve cover 12 when the valve is closed, ensuring the sealing performance when the valve is closed. Even if the sealing surface 211 is worn, it can be pressed against the first valve cover 12 in time under the elastic force of the elastic member 23, achieving dynamic sealing compensation, so as to ensure that the sealing surface 211 and the first valve cover 12 maintain good sealing for a long time. It should be noted that while the elastic member 23 applies elastic holding force to the main valve plate 21, the other end of the elastic member 23 also applies elastic force to the support plate 22, so that the support plate 22 maintains contact with the second valve cover 13. In the above-mentioned valve plate 2, at least one of the main valve plate 21 and the support plate 22 is used to connect the actuator 3, and the actuator 3 is used to drive the valve plate 2 to move back and forth along a straight opening and closing trajectory in the valve cavity 11 relative to the valve body 1 to open or close the valve body inlet 14, thereby realizing the opening or closing of the fully sealed wear-resistant slag discharge valve 100.

[0059] In some feasible embodiments, when the valve is closed, the sealing surface 211 and the first valve cover 12 can be in direct contact for sealing, or a sealing ring can be provided between them to achieve sealing. To extend the service life of the main structures such as the valve body 1 and the first valve cover 12 in the valve, it is preferred to provide a sealing ring between the sealing surface 211 and the first valve cover 12 for sealing. The sealing ring is preferably a ceramic sealing ring 16. The ceramic sealing ring 16 can be provided on the inner side wall of the first valve cover 12 and is located outside the outer circle of the valve body inlet 14. In addition, the ceramic sealing ring 16 can also be provided on the sealing surface 211, and when the sealing surface 211 closes the valve body inlet 14, the ceramic sealing ring 16 is located outside the outer circle of the valve body inlet 14. As a preferred solution, the ceramic sealing ring 16 is provided on the inner side wall of the first valve cover 12 and is located outside the outer circle of the valve body inlet 14.

[0060] In some feasible embodiments, ceramic support bars 17 arranged along the aforementioned linear opening and closing trajectory are further provided on the inner side wall of the first valve cover 12, that is, the ceramic support bars 17 are arranged parallel to the linear opening and closing trajectory and protrude from the surface of the inner side wall of the first valve cover 12. The ceramic support bars 17 can maintain a sealed sliding fit with the sealing surface 211 during the process of the valve plate 2 moving along the linear opening and closing trajectory. In practical applications, after milling grooves on the inner side wall of the first valve cover 12, the ceramic support bars 17 can be embedded in the milling grooves and bonded and fixed; the surface of the ceramic support bars 17 preferably protrudes from the surface of the inner side wall of the first valve cover 12 by 0.15 mm to 0.3 mm, with 0.2 mm being the best. It should be emphasized that both the ceramic support bars 17 and the ceramic sealing ring 16 are provided on the inner side wall of the first valve cover 12. Preferably, the heights of the ceramic support bars 17 and the ceramic sealing ring 16 protruding from the surface of the inner side wall of the first valve cover 12 are the same, that is, the surface of the ceramic support bars 17 for contact and cooperation with the sealing surface 211 is arranged at the same height as the end face of the ceramic sealing ring 16 for contact and cooperation with the sealing surface 211. Preferably, two ceramic support bars 17 are arranged in parallel. They cooperate with the ceramic sealing ring 16 to form an effective ceramic sealing pair with the main valve plate 21. During the process of the valve plate 2 reciprocating to open and close the valve, the first valve cover 12 can always be combined with the main valve plate 21 through the ceramic support bars 17 and the ceramic sealing ring 16, avoiding derailment of the ceramic sealing pair and wearing other parts, resulting in damage to the service life of the valve.

[0061] In some feasible embodiments, both the ceramic support bars 17 and the ceramic sealing ring 16 are preferably made of zirconia ceramic material, which has high wear resistance and can further improve the sealing life of the valve.

[0062] In some feasible embodiments, it is preferred that the ceramic support bars 17, the ceramic sealing ring 16 and the main valve plate 21 are all subjected to mirror treatment to achieve a mirror sealing effect.

[0063] In some feasible embodiments, the first valve cover 12 and the second valve cover 13 are the main supporting surfaces on both sides of the valve body 1. The first valve cover 12 and the second valve cover 13 are supported and connected through the valve cavity 11, so that the flatness and stability of the valve meet the standards. The valve cavity 11, the first valve cover 12 and the second valve cover 13 can be separately arranged. Sealing rings are provided at both ends of the valve cavity 11 and can be in contact with and seal the first valve cover 12 and the second valve cover 13 respectively. In some other embodiments, the arc-shaped frame can be integrally formed with the second valve cover 13, detachably connected to the first valve cover 12, and a rubber sealing ring 4 is also provided between the first valve cover 12 and the valve cavity 11. As a preferred solution, the valve cavity 11 and the second valve cover 13 are designed to be integrally cast. The first valve cover 12 and the valve cavity 11 are sealed with a fluororubber sealing ring and pressed by multiple groups of bolts to ensure the sealing performance of the valve cavity 11.

[0064] In some feasible embodiments, a raised slideway 18 arranged along the aforementioned linear opening and closing trajectory is further provided on the inner side wall of the second valve cover 13. A self-lubricating metal block 26 slidably adapted to the raised slideway 18 is provided on the side of the support plate 22 facing away from the main valve plate 21. As a preferred solution, the self-lubricating metal block 26 is a metal strip arranged parallel to the raised slideway 18, and both the self-lubricating metal block 26 and the raised slideway 18 are arranged parallel to the linear opening and closing trajectory. The self-lubricating metal block 26 is preferably a self-lubricating copper strip, which protrudes from the surface of the side of the support plate 22 facing away from the main valve plate 21. The self-lubricating copper strip and the support plate 22 can be integrally formed, welded or adhesively connected, or the self-lubricating copper strip can be installed by embedding it in a strip-shaped groove opened on the surface of the side of the support plate 22 facing away from the main valve plate 21. After the self-lubricating copper strip is embedded in the strip-shaped groove of the support plate 22, the two can be fastened by adhesion or interference fit, and the surface of the self-lubricating copper strip is set to be higher than the surface of the side of the support plate 22 facing away from the main valve plate 21.

[0065] In some feasible embodiments, it is preferred that the raised slideway 18 is a boss structure protruding from the inner side wall surface of the second valve cover 13. Two raised slideways 18 can be arranged in parallel on the inner side wall surface of the second valve cover 13. At the same time, two self-lubricating metal blocks 26 (i.e., self-lubricating copper strips) on the support plate 22 are correspondingly arranged and are in one-to-one correspondence with the two raised slideways 18. The self-lubricating metal block 26 (i.e., self-lubricating copper strip) is preferably processed by precision grinding on a grinding machine and, in cooperation with the raised slideway 18, can play a role in guiding the linear movement and sliding of the valve plate 2.

[0066] In some feasible embodiments, the main valve plate 21 is preferably made of wear-resistant alloy after heat treatment and processed through multiple processes such as grinding on a grinding machine and manual grinding, such as using Q345R wear-resistant alloy. Among the valve plates 2, at least one of the support plate 22 and the main valve plate 21 is preferably made of alloy die steel.

[0067] In some feasible embodiments, the pallet 22 is preferably a hollow plate provided with a hollow structure 221. The pallet 22 adopts a reasonable hollow structure 221, which can effectively support the main valve plate 21 without being deformed by gravity extrusion. In addition, the hollow structure 221 also plays a role in smoothly discharging materials, enabling the ash residue accumulated on the pallet 22 to leak out in time, reducing the accumulation of ash residue, and avoiding scratching the inner wall of the valve body 1 when the valve plate 2 is opened. The shape of the hollow structure 221 is not limited and can be Figures 6 to 10 in the shape of a four-leaf clover as shown, or other reasonable shape designs can also be adopted.

[0068] In some feasible embodiments, the cross-sectional area of the valve body outlet 15 is not less than that of the valve body inlet 14, and the vertical projection of the valve body inlet 14 on the second valve cover 13 is completely located inside the valve body outlet 15. As a preferred solution, the cross-sectional area of the valve body outlet 15 is designed to be smaller than that of the valve body inlet 14. Based on this, the valve has the characteristics of a small inlet and a large outlet, which can effectively reduce the accumulation of ash residue. The shape of the valve body inlet 14 is generally preferably circular, and the valve body outlet 15 is preferably non-circular, such as Figure 14 shown. The valve body outlet 15 is opened according to the geometric shape of the linear movement track of the valve plate 2 and is in the shape of a pocket. The lower half of the valve body outlet 15 is semi-circular, and the upper half includes a middle arc. Both ends of the middle arc are respectively connected to the semi-circular shape of the lower half through straight lines, and the straight lines on both sides of the middle arc are parallel and are tangent to the semi-circular shape of the lower half.

[0069] In some feasible embodiments, the elastic member 23 is preferably a die spring, the main valve plate 21 is a circular valve plate, and the main valve plate 21 is connected to the pallet 22 through a plurality of die springs, and the plurality of die springs are evenly distributed along the circumferential direction of the main valve plate 21. As Figures 6 to 10 shown, three die springs are evenly arranged around the center of the main valve plate 21, which play a role in sealing and pre-tightening the main valve plate 21, ensuring that the sealing pair between the main valve plate 21 and the first valve cover 12 is always in a fully sealed state.

[0070] In some feasible embodiments, the fully sealed wear-resistant slag discharge valve 100 is further provided with an actuator 3. The actuator 3 can be a cylinder, a hydraulic cylinder or an electric telescopic rod. The actuator 3 is arranged outside the valve body 1, and the telescopic rod of the actuator 3 penetrates the wall of the valve cavity 11 and is connected to at least one of the main valve plate 21 and the pallet 22. As a preferred solution, the main valve plate 21 mainly plays a sealing role, and the pallet 22 mainly serves as a carrier for the main valve plate 21. Based on this, the telescopic rod of the actuator 3 can be only connected to the pallet 22 to drive the entire valve plate 2 to reciprocate linearly.

[0071] Taking the actuator 3 as an example of a cylinder, the entire fully sealed wear-resistant slag discharge valve 100 is a fully sealed wear-resistant slag discharge valve. One end of the valve body 1 away from the valve body outlet 15 and the valve body inlet 14 is provided with a cylinder seat, the cylinder is fixed on the cylinder seat, and the telescopic rod of the cylinder penetrates through the wall of the valve cavity 11 and is connected to the support plate 22. Specifically: The telescopic rod of the cylinder is provided with a Y-shaped joint 7. After the Y-shaped joint 7 is clamped on the end of the support plate 22, a cylindrical pin shaft 6 penetrates through the Y-shaped joint 7 and the support plate 22, thereby realizing the connection between the Y-shaped joint 7 and the support plate 22; A wear-resistant alloy sleeve 8 is inlaid in the inner hole of the Y-shaped joint 7, which can ensure the high wear resistance of the connection part between the telescopic rod of the cylinder and the support plate 22.

[0072] In some feasible embodiments, a shaft seal is formed between the telescopic rod of the cylinder and the wall of the valve cavity 11 through a multi-layer V-shaped (tapered) combined seal 5, which can ensure the tightness of the slag discharge valve. As Figure 15 shown, the multi-layer V-shaped combined seal 5 is composed of a support ring 51, a pressure ring 52, and a multi-layer seal ring 53 located between the support ring 51 and the pressure ring 52. The support ring 51, the pressure ring 52 and the multi-layer seal ring 53 are stacked and extruded. The inner ring of the seal ring 53 holds the outer ring of the telescopic rod of the cylinder tightly, and the hole for the telescopic rod of the cylinder to penetrate through the valve cavity 11 squeezes the seal ring 53 from the outside, achieving a good sealing effect, so that between the telescopic rod of the cylinder and the wall of the valve cavity 11, it not only meets the relative sliding requirement but also meets the shaft seal requirement. In the multi-layer V-shaped combined seal 5, the seal ring 53 is preferably provided with five layers. Based on this, the entire multi-layer V-shaped combined seal 5 adopts a 7-layer high-pressure PTFE material seal and a Y-shaped pressing combined seal form.

[0073] In some feasible embodiments, to ensure the space requirement for on-site installation, the overall thickness of the entire fully sealed wear-resistant slag discharge valve 100 (i.e., the distance between the outer end faces of the first valve cover 12 and the second valve cover 13) is preferably not greater than 100 mm.

[0074] For the above-mentioned fully sealed wear-resistant slag discharge valve 100, through the inlet and outlet sealing system formed by the valve plate 2 and the valve body 1, it fundamentally solves the incomplete sealing, the unreliability and non-wear resistance of the inlet and outlet sealing pairs of the fully sealed wear-resistant slag discharge valve in a small space. The specific beneficial effects are as follows:

[0075] (1) The valve plate of the slag discharge valve adopts a double-layer plate design. Three mold springs of the same specification not only ensure the balance of the overall structure of the valve plate but also play a role in keeping the valve plate and the valve body in reliable sealing, realizing the design of a fully enclosed valve structure. In addition, the double-layer plate combination design of the main valve plate and the support plate makes the entire valve plate structure more compact, meeting the requirements of small size and height.

[0076] (2) The valve plate connects the main valve plate and the support plate through a die spring, achieving the spring preloading sealing characteristic of the valve plate against the valve body. At the same time, a highly wear-resistant zirconia sealing pair is adopted between the main valve plate and the valve body, enabling the slag discharge valve to have good sealing performance and longer durability.

[0077] (3) The shaft seal between the telescopic rod of the actuator and the valve cavity adopts a fully sealed multi-layer combined sealing structure, which is flexible in switching, does not jam, does not wear, does not adopt the packing seal form, avoids the friction of the packing against the telescopic rod during the opening and closing of the valve plate, thereby reducing the output loss of the actuator and the maintenance amount. At the same time, a fully enclosed structure is also achieved.

[0078] (4) The slag discharge valve uses a cylinder to drive the opening and closing of the valve. The pneumatic system has reliable sealing, is flexible in switching, has low resistance, has tight sealing and zero leakage inside and outside when fully closed, and zero leakage at the sealing shaft (i.e., the telescopic rod). The whole valve can be leak-free and does not require spare part replacement for 3 years in an environment with a long-term temperature of 400°C.

[0079] (5) By configuring elastic parts in the valve plate, a fully enclosed sealing structure is achieved. The valve plate is in a fully sealed state during the opening and closing process, always inside the valve body, which can completely avoid the problem of hot air and dust leakage at the traditional plug-type gate plate.

[0080] (6) The flexibility of the overall thickness (height) dimension of the valve maximizes its usage scenarios. It can be used as a slag discharge valve or as a feed valve.

[0081] Embodiment 2

[0082] This embodiment provides a slag discharge system, and at least one fully sealed wear-resistant slag discharge valve 100 as disclosed in Embodiment 1 or Embodiment 2 is provided on the slag discharge channel.

[0083] It should be noted that the structures, proportions, sizes, etc. depicted in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention. Therefore, they do not have technical essential significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the efficacy that the present invention can produce and the purpose that can be achieved, should still fall within the scope covered by the technical content disclosed in the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" cited in this specification are only for the convenience of narration and are not used to limit the scope for the implementation of the present invention. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope for the implementation of the present invention.

[0084] In the present invention, specific examples are used to elaborate on the principles and implementation manners of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A fully sealed wear-resistant slag discharge valve, characterized in that, include: A valve body (1), comprising a valve cavity (11), a first valve cover (12) and a second valve cover (13) being respectively arranged on both sides of the valve cavity (11), a valve body inlet (14) and a valve body outlet (15) being respectively provided on the first valve cover (12) and the second valve cover (13), and the valve body inlet (14) and the valve body outlet (15) being communicated with each other through the valve cavity (11); A valve plate (2) is assembled in the valve cavity (11), and the valve plate (2) comprises a main valve plate (21), a support plate (22) and an elastic member (23); the sealing surface (211) of the main valve plate (21) faces the first valve cover (12), and contacts with the first valve cover (12) to form a sliding sealing pair; the support plate (22) is located on the side of the main valve plate (21) away from the sealing surface (211), and contacts with the second valve cover (13) to form a sliding pair; the elastic member (23) is connected between the main valve plate (21) and the support plate (22) to provide an elastic pressing force for the main valve plate (21); At least one of the main valve plate (21) and the support plate (22) is used to connect to an actuator (3) so that the valve plate (2) can move along a straight opening and closing trajectory and open or close the valve body inlet (14).

2. The fully sealed wear-resistant slag discharge valve according to claim 1, wherein A ceramic sealing ring (16) is provided between the sealing surface (211) and the first valve cover (12); The ceramic sealing ring (16) is arranged on the inner wall of the first valve cover (12) and is located at the outer ring of the valve body inlet (14); or, the ceramic sealing ring (16) is arranged on the sealing surface (211), and when the sealing surface (211) closes the valve body inlet (14), the ceramic sealing ring (16) is located at the outer ring of the valve body inlet (14).

3. The fully sealed wear-resistant slag discharge valve according to claim 1 or 2, characterized in that The inner side wall of the first valve cover (12) is also provided with a ceramic support strip (17) arranged along the linear opening and closing trajectory, and the ceramic support strip (17) can be in sealing and sliding cooperation with the sealing surface (211) when the valve plate (2) moves along the linear opening and closing trajectory.

4. The fully sealed wear-resistant slag discharge valve according to claim 1 or 2, characterized in that, The inner side wall of the second valve cover (13) is also provided with a raised slideway (18) arranged along the straight opening and closing trajectory, and the side of the support plate (22) facing away from the main valve plate (21) is provided with a self-lubricating metal block (26) slidably matched with the raised slideway (18).

5. The fully sealed wear-resistant slag discharge valve according to claim 1 or 2, characterized in that, The support plate (22) is a hollow plate provided with a hollow structure (221).

6. The fully sealed wear-resistant slag discharge valve according to claim 1 or 2, characterized in that The cross-sectional area of ​​the valve body outlet (15) is not less than the cross-sectional area of ​​the valve body inlet (14), and the vertical projection of the valve body inlet (14) on the second valve cover (13) is completely located inside the valve body outlet (15).

7. The fully sealed wear-resistant slag discharge valve according to claim 1 or 2, characterized in that, The elastic member (23) is a mold spring, the main valve plate (21) is a circular valve plate, the main valve plate (21) is connected to the support plate (22) via a plurality of the mold springs, and the plurality of the mold springs are evenly distributed along the circumferential direction of the main valve plate (21).

8. The fully sealed wear-resistant slag discharge valve according to claim 1 or 2, characterized in that It further includes an actuator (3), and the actuator (3) is a cylinder, a hydraulic cylinder or an electric telescopic rod; the actuator (3) is arranged outside the valve body (1), and the telescopic rod of the actuator (3) penetrates through the cavity wall of the valve cavity (11) and is connected to at least one of the main valve plate (21) and the support plate (22).

9. The fully sealed wear-resistant slag discharge valve according to claim 8, wherein, A shaft seal is formed between the telescopic rod of the actuator (3) and the cavity wall of the valve cavity (11) through a multi-layer V-shaped combined seal (5).

10. A slag discharging system, characterized in that, At least one fully sealed wear-resistant slag discharge valve (100) as described in any one of claims 1 to 9 is provided on the slag discharge channel.

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