A rotary automatic slag hammer ash control valve

Abstract

The present invention discloses a rotary automatic slag-poking hammer-shaped ash control valve, comprising a valve seat provided with a boiler slag discharge port and a valve body provided with an ash control valve discharge port, and also comprising a valve stem and a slag-poking rod, wherein the valve stem is movably arranged in the valve body, and one end of the valve stem close to the boiler slag discharge port is connected with the slag-poking rod, and the outer wall of the slag-poking rod is provided with a slag-discharging thread along its length direction, and the boiler slag discharge port is located on the moving path of the slag-poking rod, and the valve stem is screwed in to reciprocate in the boiler slag discharge port to crush the block material, and the slag-discharging thread on the slag-poking rod is used to bring out part of the crushed material when the valve stem is screwed out of the boiler slag discharge port. The valve stem drives the slag-poking rod to move back and forth in the boiler slag discharge port to perform the slag-poking operation by screwing in, and when the slag-poking rod rotates and pushes out of the boiler slag discharge port, the slag-discharging thread on it will bring out part of the ash to achieve the effect of slag discharge, thereby avoiding the ash poke down from accumulating in the boiler slag discharge port, improving the dredging effect, and extending the service life of the boiler.

Description

Technical Field

[0001] The invention relates to the technical field of high-temperature ash control valves, in particular to a rotary automatic slag-moving hammer-shaped ash control valve. Background Art

[0002] The development and application of circulating fluidized bed boiler technology has been widely used. This technology is one of the advanced technologies for clean coal combustion and sustainable development strategy. It integrates the advantages of energy saving, clean combustion, safety and reliability, and reduced pollution emissions. However, in the actual operation of the boiler, some local structural problems will also affect the efficiency of the boiler. For example, due to frequent blockage of the slag discharge port, the boiler slag discharge gradually becomes abnormal, which seriously affects the safe and economic operation of the boiler.

[0003] At present, the dredging method of the ash (slag) outlet of the circulating fluidized bed boiler is mostly to install a slag-poking inclined pipe on the valve or the slag-dropping pipe to facilitate dredging when the slag is blocked. Once the ash (slag) outlet is blocked, the conventional dredging method is to organize personnel to use a slag-poking bar to insert the slag-poking inclined pipe into the boiler ash (slag) outlet for manual slag poking, and the on-site operators have high labor intensity. Because the furnace of the circulating fluidized bed boiler is slightly positive pressure, there is a risk of high-temperature ash leakage during slag poking, which can easily cause scalding accidents and pose a major safety hazard. Secondly, the slag-poking bar cannot take out the broken ash, resulting in the accumulation of broken ash in the slag outlet. It takes a long time to repeatedly poke the slag to complete the dredging of the slag outlet, and its dredging efficiency is low and the slag removal effect is poor. Secondly, the ash accumulated in the slag outlet is easy to harden and block the slag outlet again, resulting in the need to poke the slag again after the boiler has been running for a short time. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a rotary automatic slag-poking hammer-shaped ash control valve. The valve stem is screwed in to drive the slag-poking rod to move back and forth in the boiler slag discharge port to perform the slag-poking operation. The slag-poking rod impacts the blocky slag to crush the slag. When the slag-poking rod rotates out of the boiler slag discharge port, the slag discharge thread thereon will bring out part of the slag to achieve the slag discharge effect. As a result, the slag-poking rod will continuously discharge the crushed slag when it reciprocates to poke the slag, thereby avoiding the accumulation of the poked slag in the boiler slag discharge port, improving the unblocking effect, and extending the service life of the boiler.

[0005] The objective of the present invention is achieved through the following technical solutions: a rotary automatic slag-poking hammer-shaped ash control valve, comprising a valve seat provided with a boiler slag discharge port and a valve body provided with an ash control valve discharge port, and also comprising a valve stem and a slag-poking rod, the valve stem being movably arranged in the valve body, the slag-poking rod being connected to one end of the valve stem close to the boiler slag discharge port, the outer wall of the slag-poking rod being provided with slag discharge threads along its length direction, the boiler slag discharge port being located on the moving path of the slag-poking rod, the valve stem being reciprocated in the boiler slag discharge port by screwing in to crush the block materials, and the slag discharge threads on the slag-poking rod being used to bring out part of the crushed materials when the valve stem is screwed out of the boiler slag discharge port.

[0006] The effect of adopting the above technical scheme is that the valve stem drives the slag poking rod to move back and forth in the boiler slag discharge port by screwing in to perform the slag poking operation, and the slag poking rod impacts the block slag to crush the slag, and when the slag poking rod rotates and pushes out of the boiler slag discharge port, the slag discharge thread thereon will bring out part of the slag to achieve the slag discharge effect, and the slag poking rod will continuously discharge the crushed slag when poking the slag back and forth, thereby avoiding the accumulation of the poked slag in the boiler slag discharge port, improving the dredging effect, and extending the service life of the boiler; at the same time, the slag discharge thread has a crushing effect, which can accelerate the crushing of block slag and improve the slag crushing efficiency.

[0007] Furthermore, the valve stem is hollow, the slag-pecking rod is penetrated by a purge channel, and the purge channel is communicated with the inner hole of the valve stem.

[0008] Further, the valve stem includes a valve head, an outer tube, an intermediate tube, an inner tube and a perforated end head, the perforated end head is embedded in the valve head, one end of the outer tube is fixedly connected to the perforated end head, the intermediate tube is passed through the outer tube, the inner tube is passed through the intermediate tube and fixedly connected to the perforated end head, a first cooling channel is formed between the inner wall of the outer tube and the outer wall of the intermediate tube, a second cooling channel is formed between the inner wall of the intermediate tube and the outer wall of the inner tube, and an end of the second cooling channel close to the perforated end head is communicated with the first cooling channel.

[0009] Furthermore, a valve stem bracket is installed at the outer end of the valve body, a screw rod is fixedly arranged on the valve stem bracket, an internal thread is arranged in the inner tube, the valve stem is threadedly connected to the screw rod, and a rotary drive device is slidably arranged on the valve stem bracket, and the rotary drive device is used to drive the valve stem to rotate.

[0010] Furthermore, the rotary drive device includes an electric actuator and a rotary drive, both of which are slidably arranged on the valve stem bracket, the output end of the electric actuator is connected to the rotary drive, and the gear ring of the rotary drive is mounted on the valve stem.

[0011] Furthermore, a connecting flange is provided on the outer tube via a bearing sleeve, and the connecting flange is connected to the housing of the rotary drive via screws.

[0012] Furthermore, one end of the inner tube away from the hole end head extends to the outside of the intermediate tube and is provided with a blocking mechanism, the blocking mechanism includes a first sleeve and a second sleeve, the first sleeve is rotatably connected to the inner tube via a flat key, the second sleeve is slidably sleeved on the screw rod, the second sleeve is fixedly connected to the first sleeve via a bolt, a pressure cover is provided in the second sleeve, the pressure cover is fixedly sleeved on the screw rod, and the pressure cover abuts against one end of the inner tube away from the hole end head.

[0013] Furthermore, a round nut is provided between the first sleeve and the second sleeve, the round nut is threadedly connected to the inner tube, and the round thread abuts against the first sleeve.

[0014] Furthermore, one end of the intermediate tube away from the perforated end head extends to the outside of the outer tube and is provided with a sealing end cover, the sealing end cover is sleeved on the inner tube and abuts against the intermediate tube, and a sealing ring is provided between the inner wall of the outer tube and the outer wall of the intermediate tube.

[0015] Furthermore, a rotating joint is mounted on the valve stem, a water inlet communicating with the first cooling channel is formed on the side wall of the outer tube away from the end with the hole, a water outlet is formed on the side wall of the intermediate tube away from the end with the hole, a water inlet channel and a water outlet channel are formed on the rotating joint, the water inlet is located in the water inlet channel, and the water outlet is located in the water outlet channel.

[0016] The beneficial effects of the present invention are:

[0017] 1. The valve stem is screwed in to drive the slag-poking rod to move back and forth in the boiler slag discharge port to perform the slag-poking operation. The slag-poking rod impacts the block slag to crush the slag. When the slag-poking rod rotates out of the boiler slag discharge port, the slag-discharging thread on it will bring out part of the slag to achieve the slag-discharging effect. When the slag-poking rod reciprocates to poke the slag, it will continuously discharge the crushed slag, thereby avoiding the accumulation of the poked slag in the boiler slag discharge port, improving the dredging effect, and extending the service life of the boiler; at the same time, the slag-discharging thread has a crushing effect, which can accelerate the crushing of block slag and improve the slag crushing efficiency.

[0018] 2. The water inlet and outlet of the valve stem are located at the same end, and the position where the first cooling channel is connected to the second cooling channel and the water inlet are respectively distributed at both ends of the outer tube, so that the cooling water fills the first cooling channel and then enters the second cooling channel in large quantities. When the second cooling channel is full, it is discharged from the water outlet, so that the cooling water covers the entire first cooling channel and the second cooling channel, which has the advantages of uniform heat exchange, good cooling effect, safety and reliability.

[0019] 3. Fixing the screw rod differently, by driving the valve stem to rotate and make the valve stem rotate along the spiral line direction of the screw rod, it is achieved that only one driving mode is needed to make the valve stem have rotational freedom and translational freedom, so that the valve stem can reciprocate to dredge and the slag discharge thread can bring out the broken ash by the rotational motion. At the same time, the reciprocating rotation dredging method makes the slag discharge thread also have the slag crushing function, thereby improving the dredging effect and efficiency.

[0020] 4. Compressed air is introduced through the valve stem, and the compressed air is discharged from the slag-poking rod into the boiler slag discharge port through the purge channel to purge the broken ash, enhance the fluidity of the ash, and further improve the dredging efficiency.

[0021] 5. Automatic slag removal is realized, which reduces labor intensity, quickly and effectively completes the dredging of the boiler slag outlet, avoids the problem of high-temperature ash leakage caused by manual slag removal, and reduces the safety risks of the unit and personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of a rotary automatic slag hammer ash control valve of the present invention;

[0023] Figure 2 It is a structural schematic diagram of a valve stem in a rotary automatic slag hammer-shaped ash control valve of the present invention;

[0024] Figure 3 for Figure 1 Enlarged view of point B in the middle;

[0025] Figure 4 for Figure 2 Enlarged view of point A in the middle;

[0026] In the figure, 1-boiler slag discharge port, 2-valve seat, 3-ash control valve discharge port, 4-valve body, 5-valve stem, 6-slag poking rod, 7-slag discharge thread, 8-purge channel, 9-valve stem bracket, 10-screw, 11-electric actuator, 12-rotation drive, 13-gear ring, 14-valve head, 15-outer tube, 16-middle tube, 17-inner tube, 18-hole end, 19-first cooling channel, 20-second cooling channel, 21-connecting flange, 22-screw, 23-first shaft sleeve, 24-second shaft sleeve, 25-bolt, 26-pressure cover, 27-round nut, 28-sealing end cover, 29-sealing ring, 30-swivel joint, 31-water inlet, 32-water outlet, 33-water inlet channel, 34-water outlet channel. DETAILED DESCRIPTION

[0027] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following.

[0028] like Figures 1 to 4 As shown, a rotary automatic slag-poking hammer-shaped ash control valve comprises a valve seat 2 provided with a boiler slag discharge port 1 and a valve body 4 provided with an ash control valve discharge port 3, and also comprises a valve stem 5 and a slag-poking rod 6. The valve stem 5 is movably arranged in the valve body 4, and the end of the valve stem 5 close to the boiler slag discharge port 1 is connected with the slag-poking rod 6. The outer wall of the slag-poking rod 6 is provided with a slag-poking thread 7 along its length direction. The boiler slag discharge port 1 is located on the moving path of the slag-poking rod 6. The valve stem 5 performs a reciprocating motion in the boiler slag discharge port 1 by screwing in to crush the block material. The slag-poking thread 7 on the slag-poking rod 6 is used to bring out part of the slag when the valve stem 5 is screwed out of the boiler slag discharge port 1. The valve stem 5 is screwed in to drive the slag-poking rod 6 to move back and forth in the boiler slag discharge port 1 to perform the slag-poking operation. The slag-poking rod 6 impacts the block slag to crush the slag. When the slag-poking rod 6 rotates out of the boiler slag discharge port 1, the slag discharge thread 7 thereon will bring out part of the slag to achieve the slag discharge effect. The slag-poking rod 6 will continuously discharge the crushed slag when it reciprocates to poke the slag, thereby avoiding the accumulation of the poked slag in the boiler slag discharge port 1, improving the dredging effect, and extending the service life of the boiler. At the same time, the slag discharge thread 7 has a crushing effect, which can accelerate the crushing of block slag and improve the slag crushing efficiency.

[0029] Furthermore, if Figure 1 and Figure 2 As shown, the valve stem 5 is hollow, and the slag-poking rod 6 is penetrated by a purge channel 8, which is communicated with the inner hole of the valve stem 5. Compressed air is introduced through the valve stem 5, and the compressed air is discharged from the slag-poking rod 6 into the boiler slag discharge port 1 through the purge channel 8, so as to purge the broken ash and slag, enhance the fluidity of the ash and slag, and further improve the dredging efficiency.

[0030] Furthermore, if Figure 2As shown, the valve stem 5 includes a valve head 14, an outer tube 15, an intermediate tube 16, an inner tube 17 and a perforated end 18. The valve head 14 is conical, and the end with a small diameter of the valve head is arranged close to the boiler slag discharge port 1. The slag poking rod 6 is fixed to the small diameter end of the valve head 14. When the slag poking rod 6 is inserted into the boiler slag discharge port 1, the head of the valve head 14 is located in the boiler slag discharge port 1, thereby blocking the boiler slag discharge port 1. Since the boiler slag discharge port 1 is a high-temperature gas circulation environment, after the valve head 14 blocks the boiler slag discharge port 1, the pressure in the boiler slag discharge port 1 increases. When the valve stem 5 drives the slag poking rod 6 to withdraw from the boiler slag discharge port 1, the boiler slag discharge port 1 is in a conducting state, so that a pressure difference is formed between the boiler slag discharge port 1 and the ash control valve discharge port 3. Under this pressure Under the strong difference, the crushed ash is discharged from the boiler slag discharge port 1, ensuring that the slag poking rod 6 will not poke the block ash into the boiler slag discharge port 1, and at the same time, the compressed air is used to enhance the fluidity of the ash, and the slag discharge thread 7 brings out part of the ash, so that the crushed ash can be discharged from the boiler slag discharge port 1 to a great extent, thereby improving the dredging efficiency; the perforated end 18 is embedded in the valve head 14, one end of the outer tube 15 is fixedly connected to the perforated end 18, the intermediate tube 16 is penetrated in the outer tube 15, the inner tube 17 is penetrated in the intermediate tube 16 and fixedly connected to the perforated end 18, a first cooling channel 19 is formed between the inner wall of the outer tube 15 and the outer wall of the intermediate tube 16, and a second cooling channel 19 is formed between the inner wall of the intermediate tube 16 and the outer wall of the inner tube 17 The cooling channel 20, the end of the second cooling channel 20 close to the hole end 18 is connected to the first cooling channel 19, the valve stem 5 is provided with a rotary joint 30, the side wall of the outer tube 15 away from the hole end 18 is provided with a water inlet 31 connected to the first cooling channel 19, the side wall of the intermediate tube 16 away from the hole end 18 is provided with a water outlet 32, the rotary joint 30 is provided with a water inlet channel 33 and a water outlet channel 34, the water inlet 31 is located in the water inlet channel 33, the water outlet 32 ​​is located in the water outlet channel 34, the water inlet 31 and the water outlet 32 ​​of the valve stem 5 are located at the same end, and the position where the first cooling channel 19 is connected to the second cooling channel 20 and the water inlet 31 are respectively distributed at both ends of the outer tube 15, from After the cooling water fills the first cooling channel 19, it enters the second cooling channel 20 in large quantities. When the second cooling channel 20 is full, it is discharged from the water outlet 32, so that the cooling water covers the entire first cooling channel 19 and the second cooling channel 20, which has the advantages of uniform heat exchange, good cooling effect and safety and reliability; specifically, the rotary joint 30 is fixedly installed on the valve body 5, and the rotation of the valve body 5 drives the rotary joint 30 thereon to rotate, and the rotary joint 30 is used to arrange the water inlet pipe and the water outlet pipe. The water inlet pipe is connected to the water inlet channel 33, and the water outlet pipe is connected to the water outlet channel 34. The cooling water enters the first cooling channel 19 through the water inlet channel, flows through the second cooling channel 20 and is discharged from the water outlet channel 34, thereby realizing the cooling cycle of the valve stem 5.

[0031] Furthermore, if Figure 1As shown, a valve stem bracket 9 is installed at the outer end of the valve body 1, a screw rod 10 is fixedly arranged on the valve stem bracket 9, an internal thread is arranged in the inner tube 17, the valve stem 5 is threadedly connected with the screw rod 10, a rotary drive device is slidably arranged on the valve stem bracket 9, the rotary drive device is used to drive the valve stem 5 to rotate, the rotary drive device includes an electric actuator 11 and a rotary drive 12, the electric actuator 11 and the rotary drive 12 are both slidably arranged on the valve stem bracket 9, the output end of the electric actuator 11 is connected to the rotary drive 12, the gear ring 13 of the rotary drive 12 is sleeved on the valve stem 5, and the electric actuator 11 is connected to the rotary drive 12. The actuator 11 is used as the power input of the rotary driver 12. The power is input to the rotary driver 12 through the electric actuator 11, so that the gear ring 13 of the rotary driver 12 rotates, thereby driving the valve stem 5 in the gear ring 13 to rotate. When the valve stem 5 rotates on the screw rod 10, it will make a screw-in motion along the axial direction of the screw rod 10. During the screw-in process, the valve stem 5 will drive the rotary driver 12 and the electric actuator 11 to move on the valve stem bracket 9, so that the rotary driver 12 and the electric actuator 11 follow the valve stem 5 but do not rotate, ensuring that the valve stem 5 produces a screw-in motion. The electric actuator 11 The output reverse torque causes the gear ring 13 of the rotary driver 12 to rotate in the reverse direction, so that the valve stem 5 withdraws from the boiler slag outlet 1 in a screw-in manner, thereby realizing the reciprocating motion of the valve stem 5 in a screw-in manner; it is worth noting that the electric actuator 11 and the rotary driver 12 are both existing equipment and belong to the prior art. The point of this invention lies in the cooperation between the screw rod 10 and the valve stem 5, so that the valve stem 5 clears the boiler slag outlet 1 in a screw-in manner; the outer tube 15 is provided with a connecting flange 21 through a bearing sleeve, and the connecting flange 21 is connected to the shell of the rotary driver 12 by screws 22. On the body, a stop sleeve is rotatably provided on the rotary joint 30, and the stop sleeve is connected to the shell of the rotary drive 12. The connecting flange 21 and the stop sleeve are respectively located on both sides of the rotary drive 12, so that the relative movement between the ring gear 13 and the valve stem 5 is limited by the stop sleeve and the connecting flange 21, ensuring that the valve stem 5 is always installed in the ring gear 13 of the rotary drive 12. At the same time, the stop sleeve and the connecting flange 21 are both rotatably connected to the valve stem 5, thereby not limiting the rotational freedom of the valve stem 5, and at the same time can follow the valve stem 5 for translation, ensuring that there is no interference with the valve stem 5.

[0032] Furthermore, if Figure 3 and Figure 4As shown, one end of the inner tube 17 away from the hole end 18 extends to the outside of the intermediate tube 16 and is provided with a blocking mechanism, which includes a first sleeve 23 and a second sleeve 24. The first sleeve 23 is rotatably connected to the inner tube 17 through a flat key, and the second sleeve 24 is slidably sleeved on the screw rod 10. The second sleeve 24 is fixedly connected to the first sleeve 23 through a bolt 25. A gland 26 is provided in the second sleeve 24, and the gland 26 is fixedly sleeved on the screw rod 10. The gland 26 presses against the screw rod 10. The first sleeve 23 is connected to the inner tube 17 at one end away from the hole end 18, and the end of the inner tube 17 away from the hole end 18 is blocked by the pressure cap 26. A round nut 27 is provided between the first sleeve 23 and the second sleeve 24. The round nut 27 is threadedly connected to the inner tube 17. The round thread 27 abuts against the first sleeve 23. The movement of the first sleeve 23 is limited by the round nut 27 to prevent the first sleeve 23 from falling off from the inner tube 17. The first sleeve 23 is connected to the second sleeve 24 by the bolt 25. Then, the first sleeve 23 is rotatably connected to the inner tube 17, so that the valve stem 5 can rotate in the first sleeve 23, and the valve stem 5 moves forward at the same time to drive the first sleeve 13 and the second sleeve 24 to move. The second sleeve 24 is slidably arranged on the screw rod 10, so as not to affect the rotational freedom of the valve stem 5, so that the blocking mechanism as a whole moves forward and backward along the axial direction of the screw rod 10, and the end of the intermediate tube 16 away from the hole end 18 extends to the outside of the outer tube 15 and is provided with a sealing end cover 28, which is sleeved on the inner tube 17 and abuts against the intermediate tube 16, and the end of the intermediate tube 16 away from the hole end 18 is sealed by the sealing end cover 28, and a sealing ring 29 is arranged between the inner wall of the outer tube 15 and the outer wall of the intermediate tube 16, and the gap between the outer tube 15 and the intermediate tube 16 is blocked by the sealing ring 29, so as to seal the outer tube 15, the intermediate tube 16 and the inner tube 17, so as to ensure that the cooling water enters the valve body 5 from the water inlet 31 and is discharged from the water outlet 32.

[0033] In the description of the present invention, it is necessary to understand that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "two ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention; and it is known to those skilled in the art that the beneficial effects to be achieved by the present invention are only to achieve better beneficial effects under specific circumstances compared with the current implementation schemes in the prior art, rather than to directly achieve the best use effect in the industry.

[0034] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0035] The above is only a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art shall not deviate from the spirit and scope of the present invention, and shall be within the scope of protection of the claims attached to the present invention.

Claims

1. A rotary automatic slag hammer ash control valve, comprising a valve seat (2) provided with a boiler slag discharge port (1) and a valve body (4) provided with an ash control valve discharge port (3), characterized in that: It also comprises a valve stem (5) and a slag-poking rod (6), wherein the valve stem (5) is movably arranged in the valve body (4), the slag-poking rod (6) is connected to one end of the valve stem (5) close to the boiler slag discharge port (1), the outer wall of the slag-poking rod (6) is provided with a slag-poking thread (7) along its length direction, the boiler slag discharge port (1) is located on the moving path of the slag-poking rod (6), the valve stem (5) is screwed in and out of the boiler slag discharge port (1) to perform reciprocating motion to crush bulk materials, and the slag-poking thread (7) on the slag-poking rod (6) is used to bring out part of the crushed materials when the valve stem (5) is screwed out of the boiler slag discharge port (1); The valve stem (5) is hollow, and the slag-poking rod (6) is penetrated by a purge channel (8), and the purge channel (8) is in communication with the inner hole of the valve stem (5); The valve stem (5) comprises a valve head (14), an outer tube (15), an intermediate tube (16), an inner tube (17) and a perforated end head (18); the perforated end head (18) is embedded in the valve head (14); one end of the outer tube (15) is fixedly connected to the perforated end head (18); the intermediate tube (16) is passed through the outer tube (15); the inner tube (17) is passed through the intermediate tube (16) and fixedly connected to the perforated end head (18); a first cooling channel (19) is formed between the inner wall of the outer tube (15) and the outer wall of the intermediate tube (16); a second cooling channel (20) is formed between the inner wall of the intermediate tube (16) and the outer wall of the inner tube (17); an end of the second cooling channel (20) close to the perforated end head (18) is communicated with the first cooling channel (19).

2. The rotary automatic slag hammer ash control valve according to claim 1 is characterized in that: A valve stem bracket (9) is mounted on the outer end of the valve body, a screw rod (10) is fixedly mounted on the valve stem bracket (9), an internal thread is arranged in the inner tube (17), the valve stem (5) is threadedly connected to the screw rod (10), and a rotary drive device is slidably mounted on the valve stem bracket (9), the rotary drive device is used to drive the valve stem (5) to rotate.

3. The rotary automatic slag hammer ash control valve according to claim 2 is characterized in that: The rotary drive device comprises an electric actuator (11) and a rotary drive (12), wherein the electric actuator (11) and the rotary drive (12) are both slidably arranged on the valve stem bracket (9), an output end of the electric actuator (11) is connected to the rotary drive (12), and a gear ring (13) of the rotary drive (12) is sleeved on the valve stem (5).

4. The rotary automatic slag hammer ash control valve according to claim 3 is characterized in that: A connecting flange (21) is mounted on the outer tube (15) via a bearing sleeve, and the connecting flange (21) is connected to the housing of the rotary drive (12) via screws (22).

5. The rotary automatic slag hammer ash control valve according to claim 2 is characterized in that: One end of the inner tube (17) away from the hole end head (18) extends to the outside of the intermediate tube (16) and is provided with a blocking mechanism, the blocking mechanism comprising a first sleeve (23) and a second sleeve (24), the first sleeve (23) being rotatably connected to the inner tube (17) via a flat key, the second sleeve (24) being slidably sleeved on the screw rod (10), the second sleeve (24) being fixedly connected to the first sleeve (23) via a bolt (25), a pressure cover (26) being provided inside the second sleeve (24), the pressure cover (26) being fixedly sleeved on the screw rod (10), the pressure cover (26) being in contact with one end of the inner tube (17) away from the hole end head (18).

6. The rotary automatic slag hammer ash control valve according to claim 5 is characterized in that: A round nut (27) is provided between the first shaft sleeve (23) and the second shaft sleeve (24); the round nut (27) is threadedly connected to the inner tube (17); the round nut (27) abuts against the first shaft sleeve (23).

7. The rotary automatic slag hammer ash control valve according to claim 6 is characterized in that: One end of the intermediate tube (16) away from the perforated end head (18) extends to the outside of the outer tube (15) and is provided with a sealing end cover (28). The sealing end cover (28) is sleeved on the inner tube (17) and abuts against the intermediate tube (16). A sealing ring (29) is provided between the inner wall of the outer tube (15) and the outer wall of the intermediate tube (16).

8. The rotary automatic slag hammer ash control valve according to claim 3 is characterized in that: The valve stem (5) is provided with a rotating joint (30); a water inlet (31) communicating with the first cooling channel (19) is provided on a side wall of the outer tube (15) at an end away from the end with the hole (18); a water outlet (32) is provided on a side wall of the intermediate tube (16) at an end away from the end with the hole (18); a water inlet channel (33) and a water outlet channel (34) are provided on the rotating joint (30); the water inlet (31) is located in the water inlet channel (33), and the water outlet (32) is located in the water outlet channel (34).

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