Low-resistance anti-blocking self-cleaning type slag discharging valve

Abstract

The utility model relates to the technical field of slag discharging of circulating fluidized bed boilers, and particularly discloses a low-resistance anti-blocking self-cleaning slag discharging valve which comprises a valve body and a fastening support, the valve body is installed on the fastening support, a sliding channel is formed in the valve body, a valve plate is connected into the fastening support in a sliding mode, and the valve plate is connected with the valve body in a sliding mode. The valve plate is intermittently and slidably connected into the sliding channel to control opening and closing of the valve body. The valve body is provided with a plurality of sets of ash guiding holes, and the sliding channel is provided with an ash scraping part. When the valve plate slides in the sliding channel in the valve body, the ash residue scraping part on the sliding channel can scrape ash residues and the like on the valve plate into the ash residue guide hole, the ash residue guide hole discharges the ash residues, the ash residues on the valve plate are prevented from influencing opening and closing of the valve, and the service life of the valve is prolonged. It can be guaranteed that the valve on the slag discharging pipe of the circulating fluidized bed boiler can be opened and closed flexibly and reliably, the jamming condition is avoided, the valve plate has the self-cleaning function, and meanwhile sealing of the valve plate is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of slag discharging of circulating fluidized bed boilers, and particularly relates to a low-resistance anti-jamming self-cleaning slag discharging valve. Background Art

[0002] Circulating fluidized bed boilers adopt the clean coal combustion technology with the highest degree of industrialization. Circulating fluidized bed boilers adopt fluidized combustion, and the main structure includes two major parts: a combustion chamber (including a dense phase zone and a dilute phase zone) and a circulating return furnace (including a high-temperature gas-solid separator and a return material system). High-temperature ash slag at 850 - 950 degrees generated by the combustion of upper fuels continuously accumulates at the bottom of the fluidized bed of the fluidized bed boiler, and these high-temperature ash slag need to be continuously or intermittently discharged through a slag discharging pipe to maintain the bed differential pressure required for the normal operation of the boiler.

[0003] Currently, a sluice valve is arranged in the slag discharging pipe of the circulating fluidized bed boiler. There is a wedge-shaped groove on each of the left and right sides inside the sluice valve. This wedge-shaped groove serves as the guiding track for the opening and closing of the sluice of the sluice valve. When the slag flow passes through, slag accumulation occurs. When the valve is opened and closed and rubs against the sluice, the resistance of the sluice increases, resulting in valve jamming and being unable to be opened and closed. When the boiler has slag spraying or slag self-flowing, the sluice valve cannot be closed, which will cause a boiler shutdown accident. Content of the Utility Model

[0004] The purpose of the utility model is to provide a low-resistance anti-jamming self-cleaning slag discharging valve to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A low-resistance anti-jamming self-cleaning slag discharging valve includes a valve body and a fastening bracket. The valve body is installed on the fastening bracket. A sliding channel is opened on the valve body. A sluice plate is slidably connected inside the fastening bracket, and the sluice plate is intermittently slidably connected in the sliding channel to control the opening and closing of the valve body. A plurality of ash slag guiding holes are opened on the valve body, and a slag scraping part is arranged on the sliding channel. When the sluice plate body slides inside the sliding channel, the slag scraping part scrapes the ash slag on the valve body into the ash slag guiding holes.

[0006] Further, a valve inner ring is fixedly connected inside the valve body, and the sliding channel is opened on the valve inner ring.

[0007] Further, the slag scraping part includes a scraping strip installed on the valve inner ring, and the scraping strip is wedge-shaped.

[0008] Further, an installation frame is arranged on the fastening bracket, and a driving mechanism for driving the sluice plate to slide horizontally is installed on the installation frame.

[0009] Further, the driving mechanism includes a valve stem slidably connected to the fastening bracket. The valve plate is mounted on the valve stem through a connecting block, and a bushing is provided inside the mounting frame. The valve stem is slidably connected to the bushing; a driving member for driving the valve stem to slide horizontally is provided on the mounting frame.

[0010] Further, the driving member is an electric driving unit for driving the valve stem to slide horizontally.

[0011] Further, the driving member is a manual driving unit for driving the valve stem to slide horizontally.

[0012] Further, a protective sleeve is provided on the mounting frame, and the valve stem is mounted inside the protective sleeve.

[0013] Further, a high-temperature resistant packing is provided between the fastening bracket and the valve body.

[0014] Further, an upper flange is provided at the top of the valve body, and a lower flange is provided at the bottom of the valve body.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows: for this low-resistance anti-jamming self-cleaning slag discharge valve, through the cooperation among the valve body, the sliding channel, the valve plate, the ash slag guiding hole, and the ash scraping part, etc., in the actual use process, whenever the valve plate slides in the sliding channel inside the valve body (i.e., the opening and closing of the valve plate), the ash scraping part on the sliding channel will scrape the ash slag on the valve plate into the ash slag guiding hole, and the ash slag is discharged through the ash slag guiding hole, avoiding the influence of the ash slag on the valve plate on the opening and closing of the valve. It can ensure that the valve on the slag discharge pipe of the circulating fluidized bed boiler can be opened and closed flexibly and reliably, without jamming, the valve plate has a self-cleaning function, and at the same time, its sealing is ensured. It is superior to the traditional electric (pneumatic, hydraulic, manual) slag discharge valves, and the traditional electric, pneumatic, hydraulic, and manual slag discharge valves often have problems such as jamming during operation, incomplete closing, and incomplete opening. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a schematic diagram of the overall structure provided by an embodiment of the present utility model;

[0018] Figure 2 It is a schematic diagram of the structure of the valve body in the open state provided by an embodiment of the present utility model;

[0019] Figure 3Schematic diagram of the valve body provided by the embodiment of the present utility model in a closed state;

[0020] Figure 4 Schematic diagram of the dark rod installation method provided by another embodiment of the present utility model.

[0021] Description of reference numerals: 1. Valve body; 1.1 Valve inner ring; 2 Upper flange; 3 Lower flange; 4 Sliding channel; 5 Ash slag guiding hole; 6 Scraping strip; 7 Valve plate; 8 Valve stem; 9 Connecting block; 10 Electric drive unit; 11 Manual drive unit; 12 Mounting bracket; 13 Fastening bracket; 14 Protective sleeve; 15 Bush; 16 High-temperature resistant packing; 17 Dark rod; 18 Discharge valve body. Specific implementation manners

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0023] Please refer to Figures 1-3 , the present utility model provides a technical solution: a low-resistance anti-jamming self-cleaning slag discharge valve, including a valve body 1 and a fastening bracket 13. The valve body 1 is installed on the fastening bracket 13. A sliding channel 4 is opened on the valve body 1. A valve plate 7 is slidably connected inside the fastening bracket 13. The valve plate 7 is intermittently slidably connected in the sliding channel 4 to control the opening and closing of the valve body 1. A plurality of groups of ash slag guiding holes 5 are opened on the valve body 1, and a dust scraping part is arranged on the sliding channel 4. When the valve plate 7 slides inside the sliding channel 4, the dust scraping part scrapes the ash slag on the valve body 1 into the ash slag guiding holes 5.

[0024] Specifically, the low-resistance anti-jamming self-cleaning slag discharge valve includes a valve body 1 and a fastening bracket 13, and the valve body 1 is installed on the fastening bracket 13. A sliding channel 4 is provided on the valve body 1, and a valve plate 7 is slidably connected inside the fastening bracket 13. The valve plate 7 is intermittently slidably connected in the sliding channel 4 to control the opening and closing of the valve body 1 to meet the working requirements. A plurality of ash and slag guiding holes 5 are provided on the valve body 1. Preferably, the number of ash and slag guiding holes 5 is 8, and they are arranged in a circumferential array with the center of the valve body 1 as the axis. A slag scraping part is provided on the sliding channel 4. When the valve plate 7 slides inside the sliding channel 4, the slag scraping part scrapes the ash and slag on the valve body 1 into the ash and slag guiding holes 5. Therefore, during actual use, whenever the valve plate 7 slides in the sliding channel 4 inside the valve body 1, the slag scraping part on the sliding channel 4 will scrape the ash and slag on the valve plate 7 into the ash and slag guiding holes 5, and the ash and slag are discharged through the ash and slag guiding holes 5, avoiding the influence of the ash and slag on the valve plate 7 on the opening and closing of the valve. It can ensure that the valve on the slag discharge pipe of the circulating fluidized bed boiler can be opened and closed flexibly and reliably, without jamming, the valve plate 7 has a self-cleaning function, and at the same time ensure its sealing. It is superior to the traditional electric (pneumatic, hydraulic, manual) slag discharge valve. The traditional electric (pneumatic, hydraulic, manual) slag discharge valve often has problems such as jamming in the middle, inability to close completely, and inability to open in place. The valve plate is made of 310S high-temperature resistant material, effectively solving the problem of valve jamming caused by valve plate deformation and material blockage.

[0025] This valve is installed on the slag discharge pipeline of the circulating fluidized bed boiler through flange connection. It is the only isolated valve on the slag discharge pipeline of the circulating fluidized bed boiler. The slag flows into the valve channel through the inlet end of the valve. The electric (pneumatic, hydraulic, manual) actuator is driven remotely / on-site to drive the valve stem 8 and the plug board to open the valve channel. By opening the valve plug board to the fully open state, the ash and slag flow through the valve channel and flow to the lower slag pipe. During the opening process of the valve plug board, the ash and slag accumulated on the plug board flow out from the ash and slag guiding holes of the valve body, playing a role in self-cleaning and cleaning the slag accumulation on the sealing surface, effectively preventing the ash and slag on the sealing surface from jamming the opening of the valve, and also effectively preventing the situation of excessive torque during the opening process of the valve.

[0026] In the embodiment provided by the present utility model, a valve inner ring 1.1 is fixedly connected inside the valve body 1, and the sliding channel 4 is opened on the valve inner ring 1.1, which is convenient for the valve plate 7 to slide inside the valve body 1, can greatly improve the sliding stability of the valve plate 7, and at the same time enable the valve plate 7 to close in place with better sealing effect.

[0027] In the embodiment provided by the present utility model, the slag scraping part includes a scraping strip 6 installed on the valve inner ring 1.1. The scraping strip 6 is wedge-shaped. Specifically, the scraping strip 6 can also be made of elastic material, which can fit more closely with the valve plate 7 and scrape the ash and slag on the valve plate 7 into the ash and slag guiding holes 5 by using friction to meet the working requirements.

[0028] In the embodiment provided by the present utility model, an installation frame 12 is arranged on the fastening bracket 13, and a driving mechanism for driving the valve plate 7 to slide horizontally is installed on the installation frame 12, which can provide power for the sliding of the valve plate 7.

[0029] In the embodiment provided by the present utility model, the driving mechanism includes a valve rod 8 slidably connected to the fastening bracket 13. The valve plate 7 is installed on the valve rod 8 through a connecting block 9, and a bushing 15 is arranged inside the installation frame 12. The valve rod 8 is slidably connected to the bushing 15; a driving member for driving the valve rod 8 to slide horizontally is arranged on the installation frame 12. Therefore, during use, the valve rod 8 is driven to slide by the driving member, so that the valve plate 7 can be driven to slide through the connecting block 9, facilitating the opening and closing control of the valve plate 7.

[0030] In the embodiment provided by the present utility model, the driving member is an electric (pneumatic, hydraulic) driving unit 10 for driving the valve rod 8 to slide horizontally, improving work efficiency.

[0031] In the embodiment provided by the present utility model, the driving member is a manual driving unit 11 for driving the valve rod 8 to slide horizontally. Specifically, the manual driving unit 11 can be a handwheel, which can achieve the effect of cost saving.

[0032] Specifically, in another embodiment provided by the present utility model, the valve rod 8 is a non-rising stem 17. The working principle of the non-rising stem 17 is the same as that of the valve rod 8, and it is used to control the movement of the valve plate 7. And the above driving member drives the non-rising stem 17 to move in the same way as it drives the valve rod 8, that is, the above electric, manual, pneumatic and other methods are all applicable to driving the non-rising stem 17 to move.

[0033] A blanking valve 18 is further arranged at the bottom of the fastening bracket 13. The blanking valve 18 is normally closed. If there is residual ash on the valve plate 7 during the sliding stroke, it will fall inside the blanking valve 18. Open the blanking valve 18 regularly to clean the ash inside the blanking valve 18, avoiding the pollution of the surrounding environment by the ash on the valve plate 7.

[0034] In the embodiment provided by the present utility model, a protective sleeve 14 is arranged on the installation frame 12, and the valve rod 8 is installed inside the protective sleeve 14, which can greatly protect the valve rod 8.

[0035] In the embodiment provided by the present utility model, a high-temperature resistant packing 16 is arranged between the fastening bracket 13 and the valve body 1. Specifically, the high-temperature resistant packing 16 is generally filled with high-temperature resistant high-carbon graphite to ensure long-term stable operation at high temperatures.

[0036] In the embodiments provided by the present utility model, an upper flange 2 is provided at the top of the valve body 1, and a lower flange 3 is provided at the bottom of the valve body 1, which can facilitate the installation of the entire valve on the slag discharge pipeline of the circulating fluidized bed boiler.

[0037] It should be noted that the electrical (gas, liquid) equipment involved in this application can be driven by an external 380V / 220V power supply or 0.3 - 0.5MPa compressed air and hydraulic pressure.

[0038] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, terms such as "installation", "provided with", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0039] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A low-resistance anti-jamming self-cleaning slag discharge valve, comprising a valve body (1) and a fastening bracket (13), the valve body (1) being installed on the fastening bracket (13), characterized in that: A sliding channel (4) is provided on the valve body (1), and a valve plate (7) is slidably connected inside the fastening bracket (13), and the valve plate (7) is intermittently slidably connected in the sliding channel (4) to control the opening and closing of the valve body (1); A plurality of ash and slag guiding holes (5) are provided on the valve body (1), and a ash scraping part is arranged on the sliding channel (4); When the valve plate (7) slides inside the sliding channel (4), the ash scraping part scrapes the ash and slag on the valve body (1) into the ash and slag guiding holes (5).

2. The low-resistance anti-jamming self-cleaning slag discharge valve according to claim 1, wherein: A valve inner ring (1.1) is fixedly connected inside the valve body (1), and the sliding channel (4) is provided on the valve inner ring (1.1).

3. The low-resistance anti-jamming self-cleaning slag discharge valve according to claim 2, wherein: The ash scraping part includes a scraping strip (6) installed on the valve inner ring (1.1), and the scraping strip (6) is wedge-shaped.

4. The low-resistance anti-jamming self-cleaning slag discharge valve according to claim 1, wherein: An installation frame (12) is provided on the fastening bracket (13), and a driving mechanism for driving the valve plate (7) to slide horizontally is installed on the installation frame (12).

5. The low-resistance anti-jamming self-cleaning slag discharge valve according to claim 4, wherein: The driving mechanism includes a valve rod (8) slidably connected to the fastening bracket (13), the valve plate (7) is installed on the valve rod (8) through a connecting block (9), and a bushing (15) is arranged inside the installation frame (12), and the valve rod (8) is slidably connected to the bushing (15); A driving part for driving the valve rod (8) to slide horizontally is provided on the installation frame (12).

6. The low-resistance anti-jamming self-cleaning slag discharge valve according to claim 5, characterized in that: The driving part is an electric driving unit (10) for driving the valve rod (8) to slide horizontally.

7. A low-resistance anti-jamming self-cleaning slag discharge valve according to claim 5, characterized in that: The driving part is a manual driving unit (11) for driving the valve rod (8) to slide horizontally.

8. The low-resistance anti-jamming self-cleaning slag discharge valve according to claim 4, wherein: A protective sleeve (14) is provided on the installation frame (12), and the valve rod (8) is installed inside the protective sleeve (14).

9. A low-resistance anti-jamming self-cleaning slag discharge valve according to claim 1, characterized in that: A high-temperature resistant filler (16) is arranged between the fastening bracket (13) and the valve body (1).

10. The low-resistance anti-jamming self-cleaning slag discharge valve according to claim 1, wherein: An upper flange (2) is provided at the top of the valve body (1), and a lower flange (3) is provided at the bottom of the valve body (1).

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