阅读说明：本技术 一种新型蓄热式热力焚烧炉提升阀 (Novel heat accumulation formula heating power burns burning furnace poppet valve ) 是由 朱磊 李明 任春晓 樊魁 周儒昌 吕正林 汪涛 于 2021-02-09 设计创作，主要内容包括：本发明一种新型蓄热式热力焚烧炉提升阀,设计了具有良好密封性能的阀杆密封组件,特别设计了气封环的结构,能够有效阻隔灰尘,有效阻止废气外泄漏,且能延缓阀杆密封组件失效。同时,设计了具有良好密封性能的密封法兰组件,通过两道高度及硬度不同密封圈结构,使提升阀关闭时形成有效密封,防止高温废气内泄漏。另外气缸活塞与阀杆一端连接处的气缸浮动球头结构,以及阀杆另一端的调整支撑滑轮组组件均使提升阀整体有一定的安装偏差补偿能力,阀杆支撑套筒和支撑滑轮组组件共同作用能够使阀杆在两端均能得到有效支撑,提高提升阀的运行寿命与运行平顺性,耐用性强。(According to the novel heat accumulating type thermal incinerator poppet valve, the valve rod sealing assembly with good sealing performance is designed, and the structure of the air seal ring is particularly designed, so that dust can be effectively separated, waste gas can be effectively prevented from leaking outside, and the failure of the valve rod sealing assembly can be delayed. Meanwhile, a sealing flange assembly with good sealing performance is designed, and effective sealing is formed when the lifting valve is closed through two sealing ring structures with different heights and hardness, so that high-temperature waste gas is prevented from leaking. In addition, the floating ball head structure of the cylinder at the joint of the cylinder piston and one end of the valve rod and the adjusting support pulley block assembly at the other end of the valve rod enable the whole poppet valve to have certain installation deviation compensation capacity, the valve rod can be effectively supported at both ends under the combined action of the valve rod support sleeve and the support pulley block assembly, the service life and the running smoothness of the poppet valve are prolonged, and the durability is high.)

1. A novel poppet valve of a regenerative thermal incinerator is characterized by comprising a valve rod component (10), a valve rod sealing component (20), a supporting pulley block component (30) and a sealing flange component (40);

the valve rod assembly (10) comprises a first valve rod (101), a second valve rod (102) and a valve plate (104); one end of the first valve rod (101) is connected with the piston of the external cylinder (1), and the other end of the first valve rod is connected with one side of the valve plate (104); one end of the second valve rod (102) penetrates through the sealing flange assembly (40) and is supported by the supporting pulley block assembly (30), and the other end of the second valve rod is connected with the other side of the valve plate (104); the piston of the cylinder (1) moves to drive the first valve rod (101) to move along the axial direction, and further drives the valve plate (104) to be matched with the sealing flange assembly (40) to open or close the lift valve;

the valve rod sealing assembly (20) is arranged on the outer side of the first valve rod (101) and comprises a positioning assembly and an air seal ring (205); gas seal ring (205) are through locating component and first valve rod (101) clearance fit, and the internal surface is equipped with the hoop recess, makes the flue gas form the vortex here, avoids leaking to the external world.

2. A new poppet valve for a regenerative thermal oxidizer according to claim 1, wherein the valve stem seal assembly (20) further comprises a seal gas connector (207); the outer side of the air seal ring (205) is provided with a vent hole along the circumferential direction; one end of the sealing air connector (207) is communicated with the vent hole, the other end of the sealing air connector is connected with an external compressed air supply device, compressed air is introduced into a gap between the air seal ring (205) and the first valve rod (101), local positive pressure is formed, and abrasion of the air seal ring (205) is delayed.

3. A new poppet valve for a regenerative thermal oxidizer according to claim 1, wherein the positioning assembly comprises a sealing box body (202), a sealing box end cover (201), a bearing (204) and a positioning sleeve (206); the sealing box main body (202) is fixedly connected with the furnace body (3), and two ends of the sealing box main body are provided with sealing box end covers (201); the bearing (204) and the locating sleeve (206) are arranged in the sealing box main body (202) and located on two sides of the air seal ring (205), and the air seal ring (205) is clamped tightly by the sealing box main body (202) and the sealing box end cover (201) to locate the air seal ring (205).

4. A new poppet valve for a regenerative thermal oxidizer according to claim 3, wherein the valve stem seal assembly (20) further comprises a rubber sealing ring (203); the rubber sealing ring (203) is arranged inside the sealing box main body (202) and is tightly attached to the sealing box end cover (201) and used for preventing foreign matters from entering the sealing box main body (202).

5. A new poppet valve for a regenerative thermal oxidizer according to claim 3, wherein the bearing (204) and the locating sleeve (206) are clearance fit with the first valve stem (101) with a tolerance less than the tolerance between the air seal ring (205) and the first valve stem (101).

6. A novel poppet valve for a regenerative thermal oxidizer according to claim 1, wherein the number of circumferential grooves on the inner surface of the gas seal ring (205) is 5-15, and the depth of the grooves is 1-5 mm.

7. A novel poppet valve for a regenerative thermal oxidizer according to claim 2, wherein the number of the air holes on the outer side of the air seal ring (205) is 8-12, and the diameter of the air holes is 1-3 mm.

8. A new poppet valve for a regenerative thermal incinerator according to claim 1, characterized in that said sealing flange assembly (40) comprises an outer sealing ring (401), an inner sealing ring (402) and a valve plate sealing flange (403); the valve plate sealing flange (403) is provided with an annular outer sealing ring (401) and an annular inner sealing ring (402) which take the center of the valve plate sealing flange (403) as the center of a circle; the diameter of the outer sealing ring (401) is larger than that of the inner sealing ring (402).

9. A novel poppet valve for a regenerative thermal oxidizer according to claim 8, wherein the inner sealing ring (402) is 1-3 mm higher than the outer sealing ring (401); the hardness of the material of the inner sealing ring (402) is lower than that of the outer sealing ring (401).

10. A new poppet valve for a regenerative thermal incinerator according to claim 1, characterised in that said supporting pulley block assembly (30) comprises three guide pulleys arranged in a Y-shape around the second valve stem (102).

11. A novel poppet valve for a regenerative thermal incinerator according to claim 1 wherein one end of said first valve stem (101) is connected to the piston of the external cylinder (1) through the floating ball (2) of the cylinder to compensate for the axial deviation of the piston of the cylinder (1) from the first valve stem (101) during installation.

12. A new poppet valve for a regenerative thermal oxidizer according to claim 1, further comprising a valve stem support sleeve (4); the first valve rod (101) is fixedly connected with the furnace body (3) through a valve rod supporting sleeve (4).

Technical Field

The invention belongs to the field of waste gas incineration treatment, and particularly relates to a novel heat accumulating type poppet valve of a thermal incinerator.

Background

Heat accumulation formula thermal incinerator (RTO), it is a high-efficient organic waste gas treatment equipment, its theory of operation is: firstly, organic waste gas is heated to a temperature close to the thermal oxidation temperature through a heat accumulator, and then enters a combustion chamber for thermal oxidation, so that Volatile Organic Compounds (VOCs) in the waste gas are oxidized and decomposed into carbon dioxide and water; the purified gas passes through another heat accumulator, the temperature is reduced, and the purified gas can be discharged after reaching the discharge standard. Different heat accumulators are switched over with time through a switching valve to absorb and release heat respectively.

In the above incinerator, in order to smoothly switch the exhaust gas among the regenerators, a nonstandard valve is required to smoothly open or close the intake or exhaust passage and to ensure that the leakage of the flue gas to the outside of the incinerator (referred to as external leakage) or the leakage of the flue gas to the inside of each incinerator (referred to as internal leakage) is avoided.

The lift valve sealing structure scheme that proposes in patent CN 109882602A is equipped with the winding of PTFE packing on the lift valve shaft in the axial space that encloses through axle sleeve urceolus and axle sleeve inner tube, realizes the sealed of flue gas through the frictional contact of valve rod and PTFE packing.

The patent CN 209495337U provides a connection structure of RTO poppet valve, through the connector between cylinder and the valve rod and support the trailing wheel group, solves the problem of cylinder piston rod and connecting rod disalignment, increases the life of cylinder.

Patent CN 203614806U proposes a horizontal lift valve for RTO system, which can save the floor space and avoid the excessive wear of the valve rod.

The design scheme of current poppet valve is difficult to solve valve rod, valve plate simultaneously and uses for a long time and takes place to damage, and valve rod, valve plate operation process are sealed tight, and the sealing member replacement is difficult, and long-term operation easily takes place noise and abnormal sound scheduling problem, and above problem all can lead to the internal leakage of poppet valve or reveals outward.

Disclosure of Invention

The invention aims to overcome the defects and provides a novel heat accumulating type thermal incinerator poppet valve which adopts a brand new valve rod sealing component and a sealing flange component, ensures good sealing performance during the operation process of a valve rod and the lifting closing process, and prevents internal leakage and external leakage of waste gas.

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

a novel poppet valve of a regenerative thermal incinerator is characterized by comprising a valve rod component, a valve rod sealing component, a supporting pulley block component and a sealing flange component;

the valve rod assembly comprises a first valve rod, a second valve rod and a valve plate; one end of the first valve rod is connected with an external cylinder piston, and the other end of the first valve rod is connected with one side of the valve plate; one end of the second valve rod penetrates through the sealing flange assembly and is supported by the supporting pulley block assembly, and the other end of the second valve rod is connected with the other side of the valve plate; the cylinder piston moves to drive the first valve rod to move along the axial direction, and then the valve plate is driven to be matched with the sealing flange assembly, so that the poppet valve is opened or closed;

the valve rod sealing assembly is arranged on the outer side of the first valve rod and comprises a positioning assembly and an air seal ring; the gas seal ring passes through locating component and first valve rod clearance fit, and the internal surface is equipped with the hoop recess, makes the flue gas form the vortex here, avoids leaking to the external world.

Further, the valve rod sealing assembly also comprises a sealing air joint; the outer side of the air seal ring is provided with a vent hole along the circumferential direction; one end of the sealing air connector is communicated with the air vent, the other end of the sealing air connector is connected with an external compressed air supply device, compressed air is introduced into a gap between the air seal ring and the first valve rod, local positive pressure is formed, and abrasion of the air seal ring is delayed.

Furthermore, the positioning assembly comprises a sealing box main body, a sealing box end cover, a bearing and a positioning sleeve; the sealing box main body is fixedly connected with the furnace body, and two ends of the sealing box main body are provided with sealing box end covers; the bearing and the positioning sleeve are arranged in the sealing box main body and located on two sides of the air seal ring, and the air seal ring is clamped by the sealing box main body and the sealing box end cover to realize positioning of the air seal ring.

Further, the valve rod sealing assembly also comprises a rubber sealing ring; the rubber sealing ring is arranged in the sealing box main body and tightly attached to the sealing box end cover, and is used for blocking foreign matters from entering the sealing box main body.

Further, the bearing and the positioning sleeve (206) are in clearance fit with the first valve rod, and the fit tolerance is smaller than that between the air seal ring and the first valve rod.

Furthermore, the number of the annular grooves on the inner surface of the air seal ring is 5-15, and the depth of the grooves is 1-5 mm.

Furthermore, the number of the vent holes on the outer side of the air seal ring is 8-12, and the aperture is 1-3 mm.

Further, the sealing flange assembly comprises an outer sealing ring, an inner sealing ring and a valve plate sealing flange; the valve plate sealing flange is provided with an annular outer sealing ring and an annular inner sealing ring which take the center of the valve plate sealing flange as the circle center; the diameter of the outer sealing ring is larger than that of the inner sealing ring.

Furthermore, the inner sealing ring is 1-3 mm higher than the outer sealing ring; the hardness of the material of the inner sealing ring is lower than that of the outer sealing ring, and the height of the inner sealing ring and the height of the outer sealing ring are the distance of the sealing flange protruding out of the valve plate.

Further, the support pulley block assembly comprises three guide pulleys arranged around the second valve rod in a Y shape.

Furthermore, one end of the first valve rod is connected with an external cylinder piston through a cylinder floating ball head, and axis deviation generated by the cylinder piston and the first valve rod during installation is compensated.

Further, the novel heat accumulating type thermal incinerator poppet valve further comprises a valve rod supporting sleeve; the first valve rod is fixedly connected with the furnace body through a valve rod supporting sleeve.

Compared with the prior art, the invention has the following beneficial effects:

(1) according to the novel heat accumulating type thermal incinerator poppet valve, the valve rod sealing assembly with good sealing performance is designed, and the structure of the air seal ring is particularly designed, so that dust can be effectively separated, waste gas can be effectively prevented from leaking outside, and the failure of the valve rod sealing assembly can be delayed.

(2) The invention relates to a novel heat accumulating type thermal incinerator poppet valve, which is provided with a sealing flange component with good sealing performance, and the poppet valve is effectively sealed when closed through two sealing ring structures with different heights and hardness, so that high-temperature waste gas is prevented from leaking inwards.

(3) The novel heat accumulating type thermal incinerator poppet valve has the advantages of simple overall structure and convenience in part disassembly and replacement.

(4) According to the novel heat accumulating type thermal incinerator poppet valve, the valve rod can be effectively supported at two ends under the combined action of the valve rod supporting sleeve and the supporting pulley block assembly, the service life and the running smoothness of the poppet valve are prolonged, and the durability is high.

(5) According to the novel heat accumulating type thermal incinerator lifting valve, the cylinder floating ball head structure at the joint of the cylinder piston and one end of the valve rod and the adjusting and supporting pulley block assembly at the other end of the valve rod enable the lifting valve to have certain installation deviation compensation capacity integrally, and the installation process of the lifting valve is simplified.

Drawings

FIG. 1 is a schematic view of a poppet valve of a regenerative thermal oxidizer according to the present invention;

fig. 2 is a schematic view of a valve rod assembly of a novel poppet valve of a regenerative thermal oxidizer according to the present invention;

fig. 3 is a schematic view of a valve rod sealing assembly of a novel poppet valve of a regenerative thermal oxidizer according to the present invention;

FIG. 4 is a schematic view of a supporting pulley block of a novel poppet valve of a regenerative thermal oxidizer according to the present invention;

fig. 5 is a schematic view of a sealing flange assembly of a novel poppet valve of a regenerative thermal oxidizer according to the present invention;

fig. 6 is a schematic view of an air seal ring of a novel poppet valve of a regenerative thermal oxidizer according to the present invention.

Detailed Description

The features and advantages of the present invention will become more apparent and appreciated from the following detailed description of the invention.

The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

A new kind of regenerative thermal incinerator poppet valves, as shown in figure 1, including the valve stem assembly 10, the valve stem seal assembly 20, support the assembly 30 of the pulley block and seal the assembly 40 of the flange;

as shown in fig. 2, the stem assembly 10 includes a first stem 101, a second stem 102, and a valve plate 104; one end of the first valve rod 101 is connected with the piston of the external cylinder 1, and the other end is connected with one side of the valve plate 104; one end of the second valve rod 102 penetrates through the sealing flange assembly 40 and is supported by the supporting pulley block assembly 30, and the other end of the second valve rod is connected with the other side of the valve plate 104; the piston of the cylinder 1 moves to drive the first valve rod 101 to move along the axial direction, and then the valve plate 104 is driven to be matched with the sealing flange assembly 40, so that the poppet valve is opened or closed; the valve plate 104 is combined with the first valve stem 101 and the second valve stem 102 by two flange connection structures and a valve plate connection plate 103.

Further, the thickness of the valve plate 104 is generally not less than 4mm, and the valve plate 104 does not deform significantly when the valve is closed.

The stem seal assembly 20 is disposed outside the first stem 101 and includes a positioning assembly and a gas seal ring 205, as shown in fig. 3; the gas seal ring 205 is in clearance fit with the first valve rod 101 through a positioning assembly, and an annular groove is formed in the inner surface of the gas seal ring, so that the flue gas forms an eddy current at the position, and the flue gas is prevented from leaking to the outside, as shown in fig. 6;

further, the valve stem seal assembly 20 further includes a seal air fitting 207; the outer side of the air seal ring 205 is provided with a vent hole along the circumferential direction, as shown in fig. 6; one end of the sealing air connector 207 is communicated with the vent hole, the other end of the sealing air connector is connected with an external compressed air supply device, compressed air is introduced into a gap between the air seal ring 205 and the first valve rod 101, local positive pressure is formed, and abrasion of the air seal ring 205 is delayed. The valve rod sealing assembly 20 prevents the leakage of flue gas from the regenerator to the outside of the equipment when the valve rod moves back and forth, as shown in fig. 1.

Further, as shown in fig. 3, the positioning assembly includes a sealing box body 202, a sealing box end cover 201, a bearing 204 and a positioning sleeve 206; the sealing box main body 202 is fixedly connected with the furnace body 3, and the fixed connection mode is as follows: the sealing box flange is fixed on the furnace body 3 through bolts, and then the sealing box main body 202 is welded on the sealing box flange; two ends of the sealing box main body 202 are provided with sealing box end covers 201, and the sealing box end covers 201 and the sealing box main body 202 are fixed through bolts; the bearing 204 and the positioning sleeve 206 are arranged in the sealing box main body 202 and are positioned on two sides of the air seal ring 205, and the air seal ring 205 is clamped by the sealing box main body 202 and the sealing box end cover 201 to position the air seal ring 205.

Further, the valve stem sealing assembly 20 further comprises a rubber sealing ring 203; the rubber sealing ring 203 is arranged inside the sealing box main body 202 and clings to the sealing box end cover 201, and is used for blocking foreign matters from entering the sealing box main body 202. Preferably, the rubber seal ring 203 is a Y-shaped seal ring.

Further, the bearing 204 and the positioning sleeve 206 are in clearance fit with the first valve rod 101, and the fit tolerance should be smaller than that between the air seal ring 205 and the first valve rod 101; this fitting accuracy is used to ensure the coaxiality of the first stem 101 and the gas seal ring 205, and also to avoid the contact between the first stem 101 and the gas seal ring 205; preferably, the bearing 204 is a self-lubricating bearing.

In summary, the parts of the valve stem seal assembly axially included along the valve stem are sequentially a rubber sealing ring 203, a positioning sleeve 206, an air sealing ring 205, a bearing 204 and the rubber sealing ring 203, and two ends of the valve stem seal assembly are provided with sealing box end covers 201 fixed by bolts.

Furthermore, the number of the circumferential grooves on the inner surface of the gas seal ring 205 is tens, preferably 5-15; the depth of the groove is 1-5 mm.

Furthermore, the number of the vent holes on the outer side of the air seal ring 205 is 8-12, and the aperture is 1-3 mm.

Further, as shown in fig. 5, the sealing flange assembly 40 includes an outer sealing ring 401, an inner sealing ring 402 and a valve plate sealing flange 403; the valve plate sealing flange 403 is provided with two grooves, and an outer sealing ring 401 and an inner sealing ring 402 which take the center of the valve plate sealing flange 403 as the center of a circle and are arranged along the circumferential direction are respectively arranged; the diameter of the outer sealing ring (401) is larger than that of the inner sealing ring (402); preferably, the diameter difference is 10-20 mm. When the sealing flange assembly 40 can make the valve plate closed, avoid leaking in the flue gas, leak in the regenerator outward heat accumulation formula shown in fig. 1 promptly, the principle is: when the poppet valve is closed, the piston of the cylinder 1 extends to drive the valve rod assembly 10 to move, so that the valve plate 104 is firstly contacted with the inner sealing ring 402, the inner sealing ring 402 deforms at the moment, the valve rod assembly 10 continues to move until the limiting position is reached, the valve plate 104 is contacted with the outer sealing ring 401, and at the moment, the valve plate 104, the outer sealing ring 401 and the inner sealing ring 402 form a labyrinth sealing structure, so that smoke leakage can be effectively prevented.

Further, the inner sealing ring 402 is 1-3 mm higher than the outer sealing ring 401; the inner seal ring 402 is made of a material having a lower hardness than the outer seal ring 401.

Further, as shown in fig. 4, the supporting pulley block assembly 30 includes three guide pulleys arranged around the second valve stem 102 in a Y-shape, and sliding bearings 303 are installed in the guide pulleys.

Furthermore, one end of the first valve rod 101 is connected with the piston of the external cylinder 1 through the cylinder floating ball head 2, so that the axial deviation between the piston of the cylinder 1 and the first valve rod 101 during installation is compensated.

Further, a valve rod supporting sleeve 4 is also included; the first valve rod 101 is fixedly connected with the furnace body 3 through the valve rod supporting sleeve 4. The combined action of the valve rod supporting sleeve 4 and the supporting pulley block assembly 30 can enable the valve rod to be effectively supported at two ends, and the service life and the running smoothness of the lift valve are improved.

Further, in order to have a better high-temperature-resistant sealing effect, the inner sealing ring 402 is made of an elastic tetrafluoro material, and the outer sealing ring 401 is made of a flexible graphite material.

Further, in order to resist the corrosion of smoke, the material of the valve rod is 316 stainless steel.

Further, for better protection of the valve stem material, the material of the positioning sleeve 206 and the air seal ring 205 is tin bronze.

Further, for better durability of the pulley, the material of the guide pulley is 40 Cr.

Example 1

The valve rod assembly 10 firstly passes through the Y-shaped rubber sealing ring 203, the self-lubricating bearing 204, the air sealing ring 205, the positioning sleeve 206 and the Y-shaped rubber sealing ring 203 in the valve rod sealing assembly 20 in the furnace body 3; the support pulley assembly 30 includes two narrow pulleys 304 located at the lower side and a wide pulley 302 located at the upper side, and the two narrow pulleys 304 are brought into close contact with the second valve stem 102 and fixed by a jackscrew by adjusting the installation height of the support pulley assembly 30.

The axis installation error of the piston rod of the cylinder 1 and the valve rod assembly 10 is compensated through the floating ball head 2 of the cylinder. The narrow pulley 304 and the wide pulley 302 of the supporting pulley block assembly 30 can restrain the tilting of the valve rod assembly 10 in the operation process, so that the valve rod assembly 10 is kept in a supported state, and meanwhile, a certain movable gap is ensured between at least one pulley and the valve rod assembly 10, and the operation of the truck and se is avoided.

The valve stem seal assembly 20 provides good operational sealing for the poppet valve. The first valve rod 101 is ensured to be coaxial with the gas seal ring 205 through the positioning sleeve 206 and the self-lubricating bearing 204, dozens of annular grooves are machined in the inner surface of the gas seal ring 205, and the smoke can form vortex at the grooves and is difficult to leak to the outside. Meanwhile, a plurality of vent holes are formed in the outer surface of the air seal ring 205 in the circumferential direction, compressed air can be introduced through the seal air connector 207, and after the poppet valve operates for a period of time, if the sealing effect of the air seal ring 205 is reduced, a small amount of compressed air can be introduced at the position to form local micro-positive pressure, so that the sealing life can be prolonged.

When the poppet valve is closed, the piston of the cylinder 1 extends to drive the valve rod assembly 10 to move, so that the valve plate 104 is firstly contacted with the inner sealing ring 402, the inner sealing ring 402 deforms at the moment, the valve rod assembly 10 continues to move until the limiting position is reached, the valve plate 104 is contacted with the outer sealing ring 401, and at the moment, the valve plate 104, the outer sealing ring 401 and the inner sealing ring 402 form a labyrinth sealing structure, so that smoke leakage can be effectively prevented.

In order to have better high-temperature-resistant sealing effect, the inner sealing ring 402 is made of elastic tetrafluoro material, and the outer sealing ring 401 is made of flexible graphite material; in order to resist the corrosion of smoke, the material of the valve rod is 316 stainless steel; in order to better protect the valve rod material, the positioning sleeve and the gas seal ring are made of tin bronze; for better durability of the pulley, the material of the guide pulley is 40 Cr.

The invention has been described in detail with reference to specific embodiments and illustrative examples, but the description is not intended to be construed in a limiting sense. Those skilled in the art will appreciate that various equivalent substitutions, modifications or improvements may be made to the technical solution of the present invention and its embodiments without departing from the spirit and scope of the present invention, which fall within the scope of the present invention. The scope of the invention is defined by the appended claims.

Those skilled in the art will appreciate that those matters not described in detail in the present specification are well known in the art.