CN107246482B

CN107246482B - Quick opening and closing gate valve device for stokehole charging pipe of biomass power plant

Info

Publication number: CN107246482B
Application number: CN201710073826.4A
Authority: CN
Inventors: 杨富强
Original assignee: Shanghai Institute of Electromechanical Engineering
Current assignee: Shanghai Institute of Electromechanical Engineering
Priority date: 2017-02-10
Filing date: 2017-02-10
Publication date: 2023-04-07
Anticipated expiration: 2037-02-10
Also published as: CN107246482A

Abstract

The invention discloses a device for quickly opening and closing a gate valve of a stokehold charging pipe of a biomass power plant, which comprises: the device comprises a frame (1), a flashboard (2) and a power device (3); the frame consists of a front end cross beam (101), a middle supporting beam (105), a rear end cross beam (115) and left and right end longitudinal beams (107), and is divided into a front chamber (8) and a rear chamber (9); the upper layer and the lower layer of the front chamber are respectively connected with a discharge port of a feed bin at the upper part and a charging pipe at the lower part; an upper guide plate (108) and a lower guide plate (108) are arranged on the inner sides of the left part and the right part of the front chamber to form a sliding chute, a long-strip first sawtooth blade (102) is fixed on the inner side of the front part of the front chamber, the first sawtooth blade and a long-strip second sawtooth blade (22) at the front end of the flashboard form a scissor structure, and the flashboard is drawn from the rear chamber to the front chamber through a middle support beam; the rear chamber is provided with a flashboard, the inner sides of the left part and the right part of the rear chamber are provided with cantilever shafts (111) according to a certain interval, the cantilever shafts are provided with bearings (5), the flashboard is arranged on the bearings, and the rear part of the flashboard is connected with a power device through a connector (4).

Description

Quick opening and closing gate valve device for stokehold charging pipe of biomass power plant

Technical Field

The invention relates to a gate valve device, in particular to a device for quickly opening and closing a gate valve by a stokehold charging pipe of a biomass power plant.

Background

The biomass power generation mainly utilizes agricultural and forestry wastes as fuel and adopts direct combustion and other modes to generate power. The biomass direct combustion power generation is to send biomass raw materials into a specific boiler for combustion to generate steam to drive a turbine generator to generate power. In recent years, by combining the traditional agriculture and forestry waste disposal situation of China, the environmental protection concept is deeply focused, the environment protection technology and the equipment level are improved, and a series of policies and supporting measures for encouraging biomass power generation are timely released by the country, so that the biomass power plant is continuously built and put into production, and the good momentum of healthy development is presented.

A section of charging pipe is connected between a boiler feed inlet and a feed bin of a boiler stokehole charging system of a biomass power plant boiler and is used for functional conversion and uniform feeding. In order to prevent flame from moving upwards when the feeding port of the boiler is accidentally tempered, a special valve device (or two special valve devices) is (are) additionally arranged at the feeding pipe, and the feeding pipe can be quickly closed in an emergency state of boiler tempering. At present, no valve device special for biomass power plants exists at home and abroad, and the traditional valve devices such as a flap-type (single-side or double-side) valve device, a draw-plate type valve device and the like are generally adopted or are adaptively modified on the basis of the traditional valve devices for replacing. The valve device is limited by variety, form specificity, component complexity and the like of biomass raw materials (such as straws, barks, branches, wood blocks, sawdust, rice chaff, bagasse and the like), when the valve of the valve device is closed, the closed part at the end part of the front chamber of the valve body and the door can be blocked by falling materials, the material blocking phenomenon can not be effectively closed, gaps are left, the effects of stopping feeding and blocking air circulation can not be achieved, and even if a common upper and lower set of arrangement method is adopted, the fire hazard still exists.

Disclosure of Invention

The invention aims to provide a gate valve device for quickly opening and closing a stokehole feeding pipe of a biomass power plant.

In order to achieve the technical purpose, the invention adopts the following technical scheme:

the utility model provides a quick start-stop gate valve device of stokehold filling tube of biomass power plant, includes: a frame, a gate plate and a power device;

the frame consists of a front end cross beam, a middle supporting beam, a rear end cross beam, a left end longitudinal beam and a right end longitudinal beam, and is divided into a front chamber and a rear chamber;

the upper layer and the lower layer of the front chamber are respectively connected with a discharge port of a storage bin at the upper part and a charging pipe at the lower part; the middle of the inner sides of the left part and the right part of the front chamber is provided with an upper guide plate and a lower guide plate to form a sliding chute, the flashboard is limited to run in the sliding chute, a long-strip first sawtooth blade is fixed on the inner side of the front part of the front chamber, the first sawtooth blade and a long-strip second sawtooth blade at the front end of the flashboard form a scissors structure, the middle support beam is an upper steel plate and a lower steel plate, the middle support beam forms the rear part of the front chamber and the front part of the rear chamber, and the flashboard can be conveniently pulled from the rear chamber to the front chamber through gaps of the upper steel plate and the lower steel plate of the middle support beam;

the flashboard is placed to the rear chamber, and cantilever shaft is installed according to a determining deviation to the rear chamber left and right sides portion inboard, and cantilever shaft installs the bearing, places the flashboard on the bearing, and the flashboard includes flashboard body and second sawtooth blade, and the flashboard body front end is rectangular second sawtooth blade, and power device is connected through the connector in the flashboard body rear portion, and the flashboard can move ahead along the bearing of rear chamber, and the flashboard can remove in the spout of antechamber.

The supporting blocks are arranged below the first sawtooth blades on the inner side of the front chamber front portion, a certain distance is reserved between the supporting blocks and the first sawtooth blades, the supporting blocks are arranged below the first sawtooth blades, and the front portions of the supporting blocks are inclined downward, so that the flashboard can extend into the position below the first sawtooth blades.

The distance between the supporting block and the first sawtooth blade is the thickness of the second sawtooth blade of the flashboard.

A larger gap is formed between the end part of one guide plate below the sliding grooves on the inner sides of the left part and the right part of the front chamber and the inner side of the front chamber front part, namely a gap is reserved at the end head of the lower layer guide plate.

A long thin steel plate is obliquely fixed above the first saw-shaped blade on the inner side of the front part of the front chamber, a long thin steel plate is obliquely fixed above a guide plate on the sliding grooves on the inner sides of the left part and the right part of the front chamber, and a long thin steel plate is obliquely fixed above a middle support beam on the inner side of the rear part of the front chamber, so that the material hanging phenomenon is reduced.

Screw holes are formed in the upper and lower middle supporting beams on the inner side of the front portion of the rear chamber at a certain distance, and the rubber plate is fixed on the middle supporting beams through bolts and pressing plates, so that the upper and lower rubber plates can clamp the flashboard and keep the flashboard sealed.

The rubber plate is provided with an elliptical hole, and a bolt penetrates through the elliptical hole to adjust the vertical position of the rubber plate.

The frame antechamber and back room are the rectangle form, and the first sawtooth blade of antechamber is rectangular form, and first sawtooth blade is opened towards the antechamber has the sharp sword, sets up the second sawtooth blade of flashboard front end in the back room also for rectangular form, and second sawtooth blade cooperatees with first sawtooth blade and constitutes scissors structure.

The front chamber of the frame is in a herringbone shape, the front part of the rear chamber is in a herringbone shape, a first sawtooth blade of the front chamber is composed of two long-strip-shaped sawtooth blades and forms the herringbone shape, the first sawtooth blade is provided with a sharp edge towards the front chamber, a second sawtooth blade arranged at the front end of a flashboard in the rear chamber is also in the herringbone shape, and the second sawtooth blade is matched with the first sawtooth blade to form a scissor structure.

The front chamber of the frame is rhombus-shaped, the front part of the rear chamber is rhombus-shaped, or the rear chamber is rhombus-shaped, the first serrated blade of the front chamber is long-strip-shaped, the first serrated blade is obliquely arranged, the first serrated blade is provided with a sharp edge towards the front chamber, the second serrated blade arranged at the front end of the flashboard in the rear chamber is also long-strip-shaped, the second serrated blade is obliquely arranged, and the second serrated blade is matched with the first serrated blade to form a scissor structure.

The invention relates to a device for quickly opening and closing a gate valve by a stokehole charging pipe of a biomass power plant, which adopts a frame (valve body) and a flashboard structure, wherein the frame is divided into a front chamber and a rear chamber, the front chamber is connected with a discharge hole of a storage bin and a charging pipe, the front chamber allows biomass raw materials to pass, and the flashboard is arranged in the rear chamber; a long-strip first sawtooth blade is fixed on the inner side of the front part of the front chamber, and the first sawtooth blade and a long-strip second sawtooth blade at the front end of the flashboard form a scissor structure. When the feed port of the boiler is accidentally tempered, the control system can quickly start the flashboard with the second serrated blade, the first serrated blade fixed with the front chamber generates a 'scissors' effect, and the front chamber (including the closed part) of the valve body is effectively cut off to generate biomass raw materials in various forms of blocked materials; meanwhile, due to the structural form of the inner side of the top end of the front chamber of the valve body, impurities such as branches and leaves, wood chips, grass fibers and the like are difficult to embed and accumulate, the flashboard can be closed in place, continuous feeding is stopped in time, and air circulation is blocked, so that the aims of preventing flames from fleeing upwards and causing fire accidents are fulfilled.

The gate valve device is applied to a stokehold feeding system of a boiler of a biomass power plant, is arranged on the upper side of a feeding pipe connected between a feeding hole of the boiler and a storage bin, and has the functions of gate and air locking.

The gate valve device is divided into types I, II and III, is provided with three forms of frames and flashboards correspondingly, and can derive more forms so as to adapt to different arrangement requirements of the boiler front feeding system of the existing biomass power plant boiler.

When the gate valve device is actually applied, one or two sets of gate valve devices can be arranged at the position of the feed pipe according to field conditions and system requirements. If two sets are provided, a distance of more than 1m is supposed to be left between the two sets.

The gate valve device has the characteristics of simple structure, flexible arrangement, smooth logistics, reliable application, quick opening and closing, easy control, convenient maintenance, lower cost and the like, and is suitable for the actual operation condition of a biomass power plant.

The gate valve device can also be applied to similar application occasions for treating non-biomass materials such as municipal domestic waste, plastics, rubber and the like.

Drawings

FIG. 1 is a schematic structural view (I-shaped structure) of a gate valve device for rapidly opening and closing a stokehold charging pipe of a biomass power plant according to the invention;

FIG. 2 is a schematic structural diagram (type II structure) of a gate valve device for rapidly opening and closing a stokehold charging pipe of a biomass power plant according to the invention;

FIG. 3 is a schematic structural view (III-type structure) of a gate valve device for rapidly opening and closing a stokehold charging pipe of a biomass power plant according to the invention;

FIG. 4 isbase:Sub>A schematic sectional view taken along line A-A in FIGS. 1-3;

FIG. 5 is a schematic view of the view shown in FIG. 1 to FIG. 3 from direction D;

FIG. 6 is a schematic cross-sectional view taken along line C-C of FIGS. 1-3 (rotated 90 degrees counterclockwise);

FIG. 7 is an enlarged view of the section B-B in FIGS. 1 to 3;

FIG. 8 is an enlarged view of portion I of FIG. 4;

FIG. 9 is an enlarged view of section II of FIG. 6;

FIG. 10 is a schematic view of a first serrated blade configuration;

FIG. 11 is a schematic view of a second serrated blade (type I configuration);

FIG. 12 is a schematic view of a second serrated blade configuration (type II configuration);

FIG. 13 is a schematic view of a second serrated blade configuration (type III configuration);

FIG. 14 is a large scale reinforcing view of the shutter.

In the figure: 1 frame, 2 flashboards, 3 power devices, 4 connectors, 5 bearings, 6 rubber plates, 7 pressure plates, 8 front chambers and 9 rear chambers; 101 front end beam, 102 first sawtooth blade, 103 supporting block, 104 long thin steel plate, 105 middle supporting beam (supporting beam), 106 long thin steel plate, 107 longitudinal beam (left and right end longitudinal beam), 108 guiding plate, 109 long thin steel plate, 110 rib plate, 111 cantilever shaft, 112 rib plate, 113 lifting ring, 114 bottom plate, 115 rear end beam; 21 shutter body, 22 second serrated blade.

Detailed Description

The invention is further described with reference to the following figures and specific examples.

Referring to fig. 1, 4 to 11, a gate valve device for rapidly opening and closing a stokehold charging pipe of a biomass power plant comprises: the device comprises a frame 1, a flashboard 2, a power device 3, a connector 4, a bearing 5, a rubber plate 6 and a pressure plate 7;

the frame 1 is composed of a front end cross beam 101, a middle supporting beam 105, a rear end cross beam 115 and a left end longitudinal beam and a right end longitudinal beam 107, the frame 1 is in a shape similar to a Chinese character 'ri', and the frame 1 is divided into a front chamber 8 and a rear chamber 9. The front end cross beam 101, the rear end cross beam 115 and the left and right end longitudinal beams 107 are made of section steel or channel steel, the middle supporting beam 105 is an upper steel plate and a lower steel plate which are made of angle steel, and the frame 1 is formed by welding, see fig. 1.

Holes are formed in the peripheries of the upper layer and the lower layer of the front chamber 8 at certain intervals, so that the front chamber can be conveniently connected with a discharge hole of a storage bin at the upper part and a feed pipe at the lower part by bolts; an upper guide plate 108 and a lower guide plate 108 are arranged in the middle of the inner sides of the left part and the right part of the front chamber 8 to form a sliding chute, the shutter 2 is limited to run in the sliding chute, and the guide plates 108 are made of flat steel, which is shown in fig. 4, 6 and 8; a long-strip first sawtooth blade 102 is fixed on the inner side of the front part of the front chamber 8, and the first sawtooth blade 102 and a long-strip second sawtooth blade 22 at the front end of the flashboard 2 form a scissor structure; the first serrated blade 102 is made of cemented carbide, and the cutting edge of the first serrated blade 102 should be sharpened, as shown in fig. 10. When the gate valve device is started, a 'scissors' effect is generated between the second serrated blade 22 at the front end of the gate plate 2 and the first serrated blade 102 at the front chamber end.

A supporting block 103 is disposed below the first serrated blade 102 inside the front part of the front chamber 8, the supporting block 103 is spaced from the first serrated blade 102 by a distance equal to the thickness of the shutter second serrated blade 22, a plurality of supporting blocks 103 are disposed below the first serrated blade 102, and the front part of the supporting block 103 has a downward inclination angle, which facilitates the shutter 2 to extend below the first serrated blade 102, as shown in fig. 6 and 9. The supporting block 103 is made of small flat steel, and when the flashboard 2 is in contact with the supporting block 103, the flashboard can be stably guided in place, and plays a supporting role, and meanwhile, accumulation of sundries is avoided.

A guide plate 108 under the sliding chutes on the inner sides of the left and right parts of the front chamber 8 has a large gap with the inner side of the front part of the front chamber, namely, a gap is left at the end of the lower guide plate 108, which is shown in fig. 6, so that sundries accumulated in the sliding chutes can be conveniently discharged in the pushing process of the shutter 2. Under the lower guide plate 108, a plurality of ribs 110 are welded to reinforce the bracket, as shown in fig. 6 and 8.

The middle supporting beam 105 is made of two steel plates, namely an upper steel plate and a lower steel plate, the steel plates are made of angle steel, the middle supporting beam 105 forms the rear part of the front chamber 8 and the front part of the rear chamber 9, and the movement of the flashboard 2 from the rear chamber 9 to the front chamber 8 through gaps of the two steel plates of the middle supporting beam 105 is facilitated, and the drawing is shown in fig. 1 and 6. Screw holes are formed in the upper and lower intermediate support beams 105 on the inner side of the front portion of the rear chamber at a certain distance, and the rubber plate 6 is fixed to the intermediate support beams 105 by bolts and the pressing plate 7, so that the upper and lower rubber plates 6 can clamp the gate plate 2 and maintain sealing, as shown in fig. 6. The rubber plate 6 is provided with an elliptical hole, and a bolt passes through the elliptical hole to adjust the vertical position of the rubber plate 6. The rubber plate 6 is made of flame-retardant rubber plate material.

A long thin steel plate 104 is obliquely fixed above the first saw-shaped blade 102 on the inner side of the front part 8, a long thin steel plate 109 is obliquely fixed above a guide plate 108 on the inner side of the left and right parts of the front chamber, a long thin steel plate 106 is obliquely fixed above a middle support beam 105 on the inner side of the rear part of the front chamber, namely, the oblique long thin steel plates are arranged above the periphery of the inner side of the front chamber 8 to reduce the hanging phenomenon of the biomass raw material and ensure smooth discharging, and refer to fig. 1, 8 and 9.

The gate plate 2 is placed in the rear chamber 9, the cantilever shafts 111 are arranged on the inner sides of the left part and the right part of the rear chamber 9 at certain intervals, the bearings 5 are arranged on the cantilever shafts 111, and the gate plate 2 is placed on the bearings 5, which is shown in fig. 1 and 7; the shutter 2 comprises a shutter body 21 and a second serrated blade 22, the front end of the shutter body 21 is provided with the long second serrated blade 22, referring to fig. 11, the rear part of the shutter body 21 is connected with the power device 3 through the connector 4, the connector 4 is a fork-shaped connector, the shutter 2 can move forward along the bearing 5 of the rear chamber 9, and the shutter 2 can move in the sliding chute of the front chamber 8.

Rib plates 112 are welded at four corners of the frame of the rear chamber 9 to increase the strength of the frame 1, see fig. 1. Since the rear chamber 9 is loaded with the shutter 2, the power unit 3, and the like, the hoisting ring 113 is fixed to the frame rear end cross member 115, and is conveniently hung on a portion capable of bearing by using a wire rope or the like. The lifting ring 113 may be made by itself or made as a standard part. A bottom plate 114 is welded to the outer side of the frame rear end beam 115 for facilitating the cooperation with an actuator (e.g., a cylinder, etc.) of the power unit 3, see fig. 5.

If the size of the length direction of the flashboard 2 is large, a section steel and a plurality of bearings can be additionally arranged in the middle of a frame of a rear chamber area (the same as the running direction of the flashboard), so that the middle of the flashboard is prevented from drooping.

The gate plate 2 is: for a smaller gate valve, the gate body 21 is mainly made of a steel plate, the front end of the steel plate is welded with the second serrated blade 22, and the second serrated blade 22 is made of a hard alloy material, as shown in fig. 11. For a gate valve with a larger size, a section bar such as flat steel is welded on the back surface of the gate plate body 21 for reinforcement, see fig. 14; the edge of the second serrated blade 22 should be sharpened and the edge of the second serrated blade 22 cooperates with the edge of the first serrated blade 102 to form a scissors structure. In order to prevent rusting and facilitate fire prevention, the flashboard 2 is to be coated with a fire-retardant coating.

The main innovation points of the device for quickly opening and closing the gate valve by using the stokehole charging pipe of the biomass power plant are the frame and the flashboard. Based on variety, morphological particularity and component complexity of biomass raw materials (such as straws, barks, branches, wood blocks, sawdust, rice chaff, bagasse and the like) combusted by a biomass power plant furnace, in order to overcome the defects that the valve cannot be closed effectively due to material blocking when being closed in the prior art, so that the effects of stopping feeding and blocking air circulation cannot be achieved, the rapid opening and closing gate valve device for the charging pipe in front of the biomass power plant furnace provides three gate valve device structures, the frames of the rapid opening and closing gate valve device are divided into types I, II and III, correspond to the shapes of three flashboards, and refer to figures 1, 2 and 3, 11, 12 and 13, although the shapes are different, the contents, functions and the like of components are basically the same. The sections of the charging pipes connected with the frames of the latter two gate valve devices should also be matched. The specific description is as follows:

referring to fig. 1 and 11, a quick opening and closing gate valve device for a stokehold charging pipe of a biomass power plant is of an I type and mainly comprises: the frame comprises a frame 1 and a flashboard 2, wherein a front chamber 8 and a rear chamber 9 of the frame are rectangular, a first sawtooth blade 102 of the front chamber 8 is long-strip-shaped, and the first sawtooth blade 102 has a sharp edge towards the front chamber, which is shown in figure 10; the second serrated blade 22 arranged at the front end of the shutter 2 in the rear chamber 9 is also in a long strip shape, and the second serrated blade 22 and the first serrated blade 102 are matched to form a scissors structure.

Referring to fig. 2 and 12, a quick opening and closing gate valve device of a stokehold charging pipe of a biomass power plant is type II, and mainly comprises: the front chamber 8 of the frame is in a herringbone shape, the front part of the rear chamber 9 of the frame is in a herringbone shape, a first sawtooth blade 102 of the front chamber 8 consists of two long-strip-shaped sawtooth blades and is in a herringbone shape, and the first sawtooth blade 102 is provided with a sharp edge towards the front chamber, which is shown in figure 10; the second serrated blade 22 provided at the front end of the shutter 2 in the rear chamber 9 is also in a herringbone shape, and the second serrated blade 22 and the first serrated blade 102 cooperate to form a scissors structure.

Referring to fig. 3 and 13, a rapid opening and closing gate valve device for a stokehole charging pipe of a biomass power plant is of type III and mainly comprises: the front chamber 8 of the frame is in a diamond shape, the front part of the rear chamber 9 is in a diamond shape, or the rear chamber 9 is in a diamond shape, the first serrated blade 102 of the front chamber 8 is in a long strip shape, the first serrated blade 102 is arranged in an oblique direction, and the first serrated blade 102 is provided with a sharp edge towards the front chamber, which is shown in fig. 10; the second serrated blade 22 arranged at the front end of the shutter 2 in the rear chamber 9 is also in a long strip shape, the second serrated blade 22 is arranged in an oblique direction, and the second serrated blade 22 and the first serrated blade 102 are matched to form a scissors structure.

The invention relates to other main parts of a rapid opening and closing gate valve device of a stokehold charging pipe of a biomass power plant, which are described as follows:

a power device 3: according to the actual situation of the project, different types of driving modes such as electric, pneumatic and hydraulic can be adopted, for example, actuators such as electric push rods, air cylinders and hydraulic cylinders are arranged on the outer side of the frame 1, and the front end of the actuator is fixed with a bottom plate 114 (square steel plate) welded on the frame 1 by bolts, as shown in fig. 1 and 5. Parameters such as thrust, stroke and the like of the actuator are calculated, analyzed and determined according to conditions such as actual specifications, application occasions and the like of the gate valve device applied in engineering, and matched electric, pneumatic and hydraulic driving systems are selected correspondingly.

Connector 4: the connector 4 is a forked connector, and adopts a welding piece or a casting and forging piece to connect the gate plate 2 and the power device 3, see fig. 1, and the power device 3 is an actuator such as a cylinder. One end of the connecting rod can adopt a fork-shaped connecting mode, and the other end of the connecting rod can be connected with the connector in a connector form and size and can be prepared according to the end form of a piston rod of an actuator such as an air cylinder.

And a bearing 5 mounted on the cantilever shaft 111 for maintaining the horizontal state of the shutter 2 and ensuring the flexible drawing of the shutter 2, see fig. 7.

In addition, the upper and lower surfaces of the area of the frame rear chamber 9 are covered with sealing plates made of thin steel plates. When the stokehole charging system of the biomass power plant operates normally, the flashboard 2 is positioned in the rear chamber area of the gate valve device, and the flashboard is started only when an accident occurs, so that lubricating oil is injected into a bearing in the rear chamber area at ordinary times, and the flexible rotation of the bearing once acting is ensured. One of the purposes of the closure plate is to keep the environment within the rear chamber 9 clean.

The invention relates to a working process of a rapid opening and closing gate valve device of a stokehold charging pipe of a biomass power plant, which comprises the following steps:

the gate valve device is mainly used in a boiler stokehole feeding system of a biomass power plant. The frame 1 (valve body) is connected with a discharge port of the storage bin and a feeding pipe, so that the passing area of the biomass raw material is a front chamber 8; the shutter 2 is located in a rear chamber 9 in a normal state. The front chamber part of the frame 1 is respectively connected with the discharge port of the storage bin above the front chamber part and the feeding pipe below the front chamber part by bolts. When a backfire phenomenon occurs at a feed port of the boiler, a temperature sensor arranged at the lower part of the feed pipe sends a signal, a power device 3 of the gate valve device is started through a control system to push a flashboard 2 with a second serrated blade to rapidly move, a scissor effect is generated between the flashboard and a first serrated blade fixed on one side of a cross beam at the end part of a front chamber, the front chamber (including a closed part) is cut off to generate biomass raw materials with various forms for blocking materials, the biomass raw materials are closed in place, continuous feeding is stopped in time, air up-and-down circulation is blocked, and the purposes of preventing flame from channeling and causing fire accidents are achieved. After confirming that the problem of boiler tempering is solved and the relevant warning is removed, the power device 3 of the gate valve device can be started in a manual intervention mode, so that the gate plate 2 is reset, and feeding is recovered.

When the charging system is operating normally, the shutter 2 is located in the rear chamber area of the gate valve device and is only activated in the event of an accident. Because the rear chamber (rear part) of the gate valve device simultaneously bears the loads of the flashboard, the power device and the like, and a lifting ring is fixed on a cross beam (profile steel) at the rear end of the gate valve device, the gate valve device can be directly suspended on a storage bin and other suitable parts which can bear the loads above the gate valve device in a wire rope mode and the like; or supported on a nearby boiler front steel frame.

According to different material characteristics and use occasions, the gate valve device is divided into three types, I, II and III. The section shapes of the charging pipes connected with the latter two gate valve devices are matched, namely the charging pipes are originally rectangular and need transitional change at the connection parts. Based on three kinds of gate valve devices, by changing the size and the shape of the gate valve devices or the size and the shape of a chute, more gate valve devices can be derived to adapt to different arrangement requirements of the stokehole feeding system of the boiler of the current biomass power plant.

The present invention is not limited to the above embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a biomass power plant stokehold filling tube opens and close gate valve device fast, characterized by includes: the device comprises a frame (1), a flashboard (2) and a power device (3);

the frame (1) consists of a front end cross beam (101), a middle supporting beam (105), a rear end cross beam (115) and left and right end longitudinal beams (107), and the frame (1) is divided into a front chamber (8) and a rear chamber (9);

the upper layer and the lower layer of the front chamber (8) are respectively connected with a discharge port of a storage bin at the upper part and a charging pipe at the lower part; an upper guide plate and a lower guide plate (108) are arranged in the middle of the inner sides of the left part and the right part of the front chamber to form a sliding chute, the flashboard (2) is limited to run in the sliding chute, a long-strip first sawtooth blade (102) is fixed on the inner side of the front chamber front part, the first sawtooth blade (102) and a long-strip second sawtooth blade (22) at the front end of the flashboard (2) form a scissor structure, a middle support beam (105) is an upper steel plate and a lower steel plate, the middle support beam (105) forms the front chamber rear part and the rear chamber front part, and the flashboard (2) is favorably pulled to the front chamber (8) from the rear chamber (9) through the upper steel plate gap and the lower steel plate gap of the middle support beam (105);

flashboard (2) are placed in rear chamber (9), cantilever shaft (111) are installed according to a determining deviation to the rear chamber left and right parts inboard, installation bearing (5) are gone up in cantilever shaft (111), place flashboard (2) on bearing (5), flashboard (2) are including flashboard body (21) and second sawtooth blade (22), flashboard body (21) front end is rectangular second sawtooth blade (22), power device (3) are connected through connector (4) at flashboard body (21) rear portion, bearing (5) the antedisplacement of rear chamber can be followed in flashboard (2), flashboard (2) can move in the spout of antechamber.

2. The device for rapidly opening and closing the gate valve of the stokehold charging pipe of the biomass power plant as claimed in claim 1, is characterized in that: a supporting block (103) is arranged below the first sawtooth blade (102) on the inner side of the front chamber front portion, the supporting block (103) and the first sawtooth blade (102) are separated by a certain distance, the supporting blocks (103) are arranged below the first sawtooth blade (102), and the front portion of the supporting block (103) is in a downward inclination angle, so that the flashboard (2) can conveniently stretch into the lower portion of the first sawtooth blade (102).

3. The biomass power plant stokehole charging pipe rapid opening and closing gate valve device according to claim 2, characterized in that: the distance between the supporting block (103) and the first sawtooth blade (102) is equal to the thickness of the second sawtooth blade (22) of the flashboard.

4. The device for rapidly opening and closing the gate valve of the stokehold charging pipe of the biomass power plant as claimed in claim 1, is characterized in that: a larger gap is reserved between the end part of one guide plate (108) below the sliding grooves on the inner sides of the left part and the right part of the front chamber and the inner side of the front chamber front part, namely a gap is reserved at the end of the lower guide plate (108).

5. The device for rapidly opening and closing the gate valve of the stokehold charging pipe of the biomass power plant as claimed in claim 1, is characterized in that: a long thin steel plate (104) is obliquely fixed above a first saw-shaped blade (102) on the inner side of the front part of the front chamber, a long thin steel plate (109) is obliquely fixed above a guide plate (108) on the upper surfaces of sliding grooves on the inner sides of the left part and the right part of the front chamber, and a long thin steel plate (106) is obliquely fixed above a middle supporting beam (105) on the inner side of the rear part of the front chamber.

6. The biomass power plant stokehole charging pipe rapid opening and closing gate valve device according to claim 1, characterized in that: screw holes are formed in the upper and lower middle supporting beams (105) on the inner side of the front portion of the rear chamber at a certain distance, and the rubber plate (6) is fixed on the middle supporting beams (105) through bolts and the pressing plate (7), so that the upper and lower rubber plates (6) can clamp the flashboard (2) and keep sealing.

7. The device for rapidly opening and closing the gate valve of the stokehold charging pipe of the biomass power plant as claimed in claim 6, is characterized in that: an elliptical hole is formed in the rubber plate (6), and a bolt penetrates through the elliptical hole to adjust the vertical position of the rubber plate (6).

8. The device for rapidly opening and closing the gate valve of the stokehold charging pipe of the biomass power plant as claimed in claim 1, is characterized in that: the front chamber and the rear chamber of the frame (1) are rectangular, the first sawtooth blade (102) of the front chamber (8) is long, the first sawtooth blade (102) is opened towards the front chamber to form a sharp edge, the second sawtooth blade (22) arranged at the front end of the flashboard (2) in the rear chamber (9) is also long, and the second sawtooth blade (22) is matched with the first sawtooth blade (102) to form a scissor structure.

9. The device for rapidly opening and closing the gate valve of the stokehold charging pipe of the biomass power plant as claimed in claim 1, is characterized in that: the front chamber (8) of the frame (1) is in a herringbone shape, the front part of the rear chamber (9) is in a herringbone shape, a first sawtooth blade (102) of the front chamber consists of two long-strip-shaped sawtooth blades and forms the herringbone shape, the first sawtooth blade (102) is provided with a sharp edge towards the front chamber, a second sawtooth blade (22) arranged at the front end of a flashboard (2) in the rear chamber (9) is also in the herringbone shape, and the second sawtooth blade (22) is matched with the first sawtooth blade (102) to form a scissors structure.

10. The device for rapidly opening and closing the gate valve of the stokehold charging pipe of the biomass power plant as claimed in claim 1, is characterized in that: the front chamber (8) of the frame (1) is in a diamond shape, the front part of the rear chamber (9) is in a diamond shape, or the rear chamber (9) is in a diamond shape, the first sawtooth blade (102) of the front chamber (8) is in a long strip shape, the first sawtooth blade (102) is arranged in a slant mode, the first sawtooth blade (102) is provided with a sharp edge towards the front chamber, the second sawtooth blade (22) arranged at the front end of the flashboard (2) in the rear chamber (9) is also in a long strip shape, the second sawtooth blade (22) is arranged in a slant mode, and the second sawtooth blade (22) is matched with the first sawtooth blade (102) to form a scissor structure.