CN117072751A - Tower three-chamber RTO switching valve mechanism - Google Patents

Tower three-chamber RTO switching valve mechanism Download PDF

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Publication number
CN117072751A
CN117072751A CN202311176817.XA CN202311176817A CN117072751A CN 117072751 A CN117072751 A CN 117072751A CN 202311176817 A CN202311176817 A CN 202311176817A CN 117072751 A CN117072751 A CN 117072751A
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CN
China
Prior art keywords
valve shaft
rto
falling
switching valve
gland
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202311176817.XA
Other languages
Chinese (zh)
Inventor
许永童
郑庆华
王义成
秦庆丰
王康
李伟刚
陈龙
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Lanbao Environmental Protection Technology Co ltd
Original Assignee
Shanghai Lanbao Environmental Protection Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shanghai Lanbao Environmental Protection Technology Co ltd filed Critical Shanghai Lanbao Environmental Protection Technology Co ltd
Priority to CN202311176817.XA priority Critical patent/CN117072751A/en
Publication of CN117072751A publication Critical patent/CN117072751A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K41/00—Spindle sealings
    • F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C5/00—Crossheads; Constructions of connecting-rod heads or piston-rod connections rigid with crossheads
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/08—Guiding yokes for spindles; Means for closing housings; Dust caps, e.g. for tyre valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K41/00—Spindle sealings
    • F16K41/003—Spindle sealings by fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
    • F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Details Of Valves (AREA)

Abstract

The invention discloses a tower type three-chamber RTO switching valve mechanism, which aims at the movement of a switching valve in the incineration process of large-air-volume, high-concentration and volatile organic waste gas, and is provided with the following structure: a three-stage sealing structure formed by graphite packing, compressed air and a framework oil seal; a flexible connection compensation structure constructed by the fisheye joint and the Y-shaped joint; thirdly, a double anti-falling structure constructed by the thread pair and the anti-falling clamping piece; and (IV) an adjustable riding wheel structure. The problems of easiness in abrasion, easiness in leakage, easiness in falling and difficulty in adjustment in the operation process of the switching valve are solved, and the high-efficiency and stable operation of the switching valve is ensured.

Description

Tower three-chamber RTO switching valve mechanism
Technical Field
The invention relates to the technical field of environmental protection equipment, in particular to a tower type three-chamber RTO switching valve mechanism.
Background
RTO is a high-efficient organic waste gas treatment equipment, compares with traditional catalytic combustion and direct-fired thermal oxidation stove, has thermal efficiency height, running cost low, characteristics such as can handle high amount of wind medium and low concentration waste gas. RTO is a regenerative oxidation furnace, and the principle is that organic matters in the exhaust gas are oxidized into corresponding carbon dioxide and water at high temperature, so that the exhaust gas is purified, and heat released during decomposition of the exhaust gas is recovered. Taking patent with the publication number of CN208237886U and the name of three-chamber RTO heat accumulating combustion furnace body with purging pipeline as an example, the RTO main body structure consists of a combustion chamber, a heat accumulating chamber, a switching valve and the like.
The switching valve mechanism is an important component of the tower type three-chamber RTO and is a key for ensuring the realization of the treatment efficiency. The valve shaft is rigidly connected with the telescopic rod of the air cylinder, and in the operation process of the switching valve, due to the severe field environment, untimely maintenance and other reasons, the conditions of easy abrasion, easy leakage, easy falling and difficult adjustment are caused in the operation process of the switching valve, so that the RTO operation efficiency is seriously affected, and the operation and maintenance cost of enterprises is increased.
Disclosure of Invention
The invention aims to provide a tower type three-chamber RTO switching valve mechanism so as to solve the problems in the prior art.
The purpose of the invention is realized in the following way: a tower three-chamber RTO switching valve mechanism comprising:
a cylinder (1) mounted outside the RTO chamber;
a round rod-shaped valve shaft (5) horizontally penetrating through the RTO outer wall (11) and extending into the RTO interior (10), and a telescopic rod of the air cylinder (1) is connected with the valve shaft (5);
a switching valve plate (8) which is used for opening and closing the valve port (9) and is used for fixing the sleeve valve shaft (5) and is positioned in the RTO (10);
the anti-leakage sealing structure (6) is integrally of an annular structure and seals a fit gap between the valve shaft (5) and the RTO outer wall (11);
a flexible connection structure (2);
the flexible connecting structure is characterized in that the flexible connecting structure (2) is movably connected with the telescopic rod and the valve shaft (5) of the air cylinder (1) and comprises a Y-shaped connector (21), a connector pin shaft (22) and a fish eye connector (23), the Y-shaped connector (21) is in threaded connection with the valve shaft (5), the fish eye connector (23) is in threaded connection with the telescopic rod of the air cylinder (1), a joint ball bearing of the fish eye connector (23) is located in a U-shaped groove of the Y-shaped connector (21), and the connector pin shaft (22) is movably connected with the joint ball bearing of the Y-shaped connector (21) and the fish eye connector (23) in a penetrating mode.
Further, a first anti-falling structure (3) is arranged at the connecting part of the valve shaft (5) and the Y-shaped joint (21), the first anti-falling structure (3) comprises a first anti-falling clamping piece (31) which is a bending plate integrally, the first anti-falling clamping piece (31) is provided with a first U-shaped clamping groove (31 a), the first clamping groove (31 a) detachably fixes the sleeve valve shaft (5) in a direction perpendicular to the axis of the valve shaft (5), and the first anti-falling clamping piece (31) is detachably fixedly connected with the Y-shaped joint (21).
Further, the first anti-falling clamping piece (31) is integrally an L-shaped bending plate and is divided into two mutually perpendicular parts, one part of the first anti-falling clamping piece (31) is perpendicular to the valve shaft (5) and provided with a first clamping groove (31 a), the other part of the first anti-falling clamping piece (31) is parallel to the valve shaft (5) and provided with a first slotted hole (31 b), the first slotted hole (31 b) is parallel to the valve shaft (5), the first anti-falling structure (3) is further provided with a first fixing screw (32), and the first fixing screw (32) penetrates through the first slotted hole (31 b) and is in threaded connection with the Y-shaped joint (21).
Further, the connection part of the fish-eye joint (23) and the telescopic rod of the air cylinder (1) is provided with a second anti-falling structure (4), the second anti-falling structure (4) comprises a second anti-falling clamping piece (41) and a fixed substrate (43), the second anti-falling clamping piece (41) is integrally a bending plate and is provided with a second U-shaped clamping groove (41 a), the second clamping groove (41 a) is detachably fixed in a sleeved mode with the fish-eye joint (23) in a direction perpendicular to the axis of the valve shaft (5), the fixed substrate (43) is fixedly sleeved with the telescopic rod of the air cylinder (1), and the second anti-falling clamping piece (41) is detachably fixedly connected with the fixed substrate (43).
Further, the second anti-falling structure (4) comprises a second fixing screw (42) sleeved with a nut, the second anti-falling clamping piece (41) is provided with a second fixing hole (41 b), and the second fixing screw (42) penetrates through the second fixing hole (41 b) and is connected with the fixing substrate (43) in a penetrating mode and is locked by the nut.
Further, the leakage-proof sealing structure (6) comprises:
an annular main seat (610) fixedly attached to the RTO outer wall (11), wherein the annular main seat (610) surrounds the valve shaft (5);
the valve shaft (5) is movably penetrated with the graphite packing (66) along the axial direction and takes the graphite packing (66) as a sliding support, and the graphite packing (66) is provided with a pair of graphite packing (66) and is distributed at intervals along the axial direction;
annular, encircle air seal ring (67) of valve shaft (5), a pair of graphite packing (66) relatively centre gripping air seal ring (67) in the axial, air seal ring (67) is furnished with compressed air connector (69), annular main seat (610) are pegged graft to compressed air connector (69), annular main seat (610) are equipped with vent (68) along its radial extension, the bleeder vent has been seted up to air seal ring (67), compressed air connector (69) are put through with the air compressor machine, compressed air connector (69), vent (68), the bleeder vent of air seal ring (67) are put through in proper order to fill in the fit clearance between air seal ring (67) and valve shaft (5) and have the high-pressure seal gas that the pressure value is greater than inside (10) atmospheric pressure of RTO.
Further, the leakage-proof sealing structure (6) further comprises:
the gland group consists of an annular first gland (62) and a second gland (64), the gland group is provided with a plurality of locking screws (61) which encircle the valve shaft (5) and are distributed along the circumferential direction, the first gland (62), the second gland (64) and the annular main seat (610) are sequentially distributed along the axial direction of the valve shaft (5), and the locking screws (61) penetrate through the first gland (62) and the second gland (64) and are in threaded connection with the annular main seat (610) so that the gland group is fixedly connected with the outer shaft end of the annular main seat (610);
an annular framework oil seal (63), wherein an annular groove is coaxially formed on the inner circular edge of the first gland (62), the framework oil seal (63) is fixed in the annular groove, and the inner circular side of the framework oil seal (63) is sealed and attached to the valve shaft (5) under the locking action of a locking screw (61);
the second gland (64) is provided with an axial convex part protruding towards the RTO inside (10), and the axial convex part of the second gland (64) presses the gasket (65) against one of the graphite packing (66) under the locking action of the locking screw (61).
Further, at least two sets of adjustable riding wheel structures (7) positioned in the RTO (10) are also included;
the riding wheel structure (7) comprises:
a riding wheel (71) for rolling and supporting the valve shaft (5);
an upper bracket (73), wherein the upper bracket (73) is provided with a shaft pin (72), and the riding wheel (71) is rotatably connected to the upper bracket (73) through the shaft pin (72);
a lower bracket (76) which is positioned right below the upper bracket (73);
the upper bracket (73) is connected with the lower bracket (76) in a lifting and adjusting mode through the adjusting components, the two adjusting components are symmetrically distributed by taking the central axis of the riding wheel (71) as a standard, and the number of each adjusting component is two and is respectively positioned below the two shaft ends of the riding wheel (71);
wherein each adjusting assembly comprises an adjusting bolt (74) and a plurality of fixing nuts (75) sleeved with the adjusting bolts (74), wherein the adjusting bolts (74) penetrate through the upper bracket (73) and the lower bracket (76), and the fixing nuts (75) lock the distance between the upper bracket (73) and the lower bracket (76).
Further, the upper bracket (73) is provided with four upper adjusting holes (73 a) which are vertically communicated and are matched with the adjusting assemblies one by one, the upper adjusting holes (73 a) are arranged into oblong holes, the length direction of the upper adjusting holes is parallel to the axial direction of the riding wheel (71), and the adjusting bolts (74) penetrate through the upper adjusting holes (73 a).
The invention has the beneficial effects that:
1. the sealing scheme is improved, the graphite packing, the compressed air and the framework oil seal form a three-stage sealing structure, and the three-stage sealing is mutually supplemented, so that not only is the waste gas inside the RTO prevented from leaking to the outside, but also the valve shaft is ensured to have a certain degree of freedom of movement, the abrasion is slowed down, and the service life is prolonged;
2. the flexible connecting structure is used for connecting the telescopic rod and the valve shaft of the air cylinder, the fish-eye joint is connected with the Y-shaped joint, and even if the valve shaft is not concentric with the telescopic rod of the air cylinder, enough axial driving force can be obtained, concentricity is automatically found in the moving process, concentricity deviation is compensated, good sealing of the switching valve is ensured, and meanwhile, various defects of rigid connection of the valve shaft and the telescopic rod of the air cylinder are avoided;
3. the first and second anti-drop structures are arranged, the valve shaft and the Y-shaped joint are fixed by the first anti-drop structure, the fish-eye joint and the telescopic rod of the air cylinder are fixed by the second anti-drop structure, and the problem that the switching valve is off in long-term movement is effectively solved on the premise that the axial movement and radial movement of the valve shaft are not influenced;
4. the adjustable riding wheel structure is arranged, the adjusting bolts are arranged below the riding wheel, the longitudinal adjustment operation of the riding wheel can be realized, the upper adjusting holes are formed in the upper bracket, the transverse adjustment operation of the riding wheel can be realized, the longitudinal and transverse positions of the riding wheel are regularly adjusted, the valve shaft is always concentric with the leakage-proof sealing structure, the three-level sealing effect is ensured, the abrasion of the switching valve shaft is reduced, and the service life of the valve shaft is prolonged.
Drawings
Fig. 1 is a system layout of the present invention.
Fig. 2 is a cross-sectional view of a leak-proof seal structure.
Fig. 3 is a schematic structural view of the flexible connection structure.
Fig. 4 is a detailed schematic view of the flexible connection structure.
Fig. 5 is a schematic structural view of the first anti-disengagement clip.
Fig. 6 is a schematic structural view of the second anti-disengagement clip.
Fig. 7 is a schematic view of an adjustable idler configuration.
Fig. 8 is a top view of fig. 7.
Detailed Description
The invention will be further described with reference to figures 1-8 and the specific examples.
In the prior art, in the operation process of the switching valve, due to the reasons of severe field environment, untimely overhaul and maintenance and the like, the conditions of easy abrasion, easy leakage, easy falling and difficult adjustment are generated in the operation process of the switching valve, and the RTO operation efficiency is seriously influenced.
As shown in fig. 1, a tower three-chamber RTO switching valve mechanism includes:
a cylinder 1 installed outside the RTO chamber;
a round rod-shaped valve shaft 5 horizontally penetrating through the RTO outer wall 11 and extending into the RTO interior 10, and a telescopic rod of the air cylinder 1 is connected with the valve shaft 5;
a switching valve plate 8 which is fixedly sleeved with the valve shaft 5 and is positioned in the RTO interior 10 and used for opening and closing the valve port 9, and the valve shaft 5 is driven by the air cylinder 1 to translate to drive the switching valve plate 8 to translate so as to open and close the valve port 9;
the flexible connection structure 2 is shown in fig. 3 and 4, the flexible connection structure 2 is movably connected with the telescopic rod and the valve shaft 5 of the air cylinder 1, and comprises a Y-shaped joint 21, a joint pin shaft 22 and a fish-eye joint 23, the Y-shaped joint 21 is in threaded connection with the valve shaft 5, the fish-eye joint 23 is in threaded connection with the telescopic rod of the air cylinder 1, a joint ball bearing of the fish-eye joint 23 is positioned in a U-shaped groove of the Y-shaped joint 21, and the joint pin shaft 22 is movably connected with the joint ball bearings of the Y-shaped joint 21 and the fish-eye joint 23 in a penetrating manner;
the anti-leakage sealing structure 6 is an annular structure and seals the fit clearance between the valve shaft 5 and the RTO outer wall 11.
The connection part between the valve shaft 5 and the Y-shaped joint 21 is provided with a first anti-falling structure 3, the first anti-falling structure 3 comprises a first anti-falling clamping piece 31 which is a bending plate integrally, the first anti-falling clamping piece 31 is provided with a U-shaped clamping groove 31a, the clamping groove 31a detachably fixes the sleeve valve shaft 5 in a direction perpendicular to the axis of the valve shaft 5, and the first anti-falling clamping piece 31 is detachably fixedly connected with the Y-shaped joint 21.
The anti-falling clamping piece I31 is integrally an L-shaped bending plate and is divided into two mutually perpendicular parts, one part of the anti-falling clamping piece I31 is perpendicular to the valve shaft 5 and provided with a clamping groove I31 a, the other part of the anti-falling clamping piece I31 is parallel to the valve shaft 5 and provided with a long round hole I31 b, the long round hole I31 b is parallel to the valve shaft 5, the anti-falling structure I3 is also provided with a fixing screw I32, and the fixing screw I32 penetrates through the long round hole I31 b and is in threaded connection with the Y-shaped joint 21.
The fish-eye joint 23 is provided with a second anti-falling structure 4 at the connecting part of the fish-eye joint 23 and the telescopic rod of the air cylinder 1, the second anti-falling structure 4 comprises a second anti-falling clamping piece 41 and a fixed substrate 43, the second anti-falling clamping piece 41 is integrally a bending plate and is provided with a second U-shaped clamping groove 41a, the second clamping groove 41a is detachably fixed and sleeved with the fish-eye joint 23 in the direction perpendicular to the axis of the valve shaft 5, the fixed substrate 43 is fixedly sleeved with the telescopic rod of the air cylinder 1, and the second anti-falling clamping piece 41 is detachably and fixedly connected with the fixed substrate 43.
The second anti-drop structure 4 includes a second fixing screw 42 sleeved with a nut, a second fixing hole 41b is formed in the second anti-drop clamping member 41, and the second fixing screw 42 is inserted into the second fixing hole 41b and is connected with the fixing substrate 43 in a penetrating manner, and is locked by the nut.
The leak-proof seal structure 6 includes:
an annular main seat 610 fixedly and hermetically attached to the RTO outer wall 11, wherein the annular main seat 610 surrounds the valve shaft 5;
the annular graphite packing 66 fixed on the inner wall of the annular main seat 610 is mainly formed by finely weaving reinforced graphite wires such as various reinforced fibers, metal wires (steel wires, copper wires, nickel wires, carbon fibers, pre-oxidized wires and glass yarns) serving as raw materials, is suitable for dynamic sealing under high-temperature and high-pressure conditions, and is characterized in that the graphite packing 66 is movably penetrated in the axial direction of the valve shaft 5 and is used as a sliding support, and the graphite packing 66 is provided with a pair of graphite packing 66 and is distributed at intervals in the axial direction;
the annular air seal ring 67 surrounding the valve shaft 5, the pair of graphite packing 66 clamps the air seal ring 67 relatively in the axial direction, the air seal ring 67 is provided with a compressed air connector 69, the compressed air connector 69 is inserted into the annular main seat 610, the annular main seat 610 is provided with a ventilation hole 68 extending along the radial direction of the annular main seat, the air seal ring 67 is provided with ventilation holes, the compressed air connector 69 is communicated with an air compressor, the ventilation holes of the compressed air connector 69, the ventilation hole 68 and the air seal ring 67 are sequentially communicated, so that a matching gap between the air seal ring 67 and the valve shaft 5 is filled with high-pressure sealing gas with a pressure value larger than 10 air pressure in the RTO;
the gland group consists of an annular first gland 62 and an annular second gland 64, the gland group is provided with a plurality of locking screws 61 which encircle the valve shaft 5 and are distributed along the circumferential direction, the first gland 62, the second gland 64 and the annular main seat 610 are distributed along the axial direction of the valve shaft 5 in sequence, and the locking screws 61 penetrate through the first gland 62 and the second gland 64 and are in threaded connection with the annular main seat 610 so as to enable the gland group to be fixedly connected with the outer shaft end of the annular main seat 610;
an annular skeleton oil seal 63, wherein an annular groove is coaxially formed on the inner circular edge of the first gland 62, the skeleton oil seal 63 is fixed in the annular groove, and the inner circular side of the skeleton oil seal 63 is sealed and attached to the valve shaft 5 under the locking action of the locking screw 61;
the annular backing ring 65, the second gland 64 has an axial projection projecting in the direction of the RTO interior 10, the axial projection of the second gland 64 pressing the backing ring 65 against one of the graphite packing 66 under the locking action of the locking screw 61.
In addition, the mechanism comprises two sets of adjustable riding wheel structures 7 in the RTO interior 10.
The riding wheel structure 7 includes:
a riding wheel 71 for rolling and supporting the valve shaft 5;
an upper bracket 73, the upper bracket 73 is provided with a shaft pin 72, and the riding wheel 71 is rotatably connected to the upper bracket 73 through the shaft pin 72;
a lower bracket 76 located directly below the upper bracket 73;
the upper bracket 73 is connected with the lower bracket 76 in a lifting and adjusting manner through the adjusting assemblies, the two adjusting assemblies are symmetrically distributed by taking the central axis of the riding wheel 71 as a standard, and the number of each adjusting assembly is two and are respectively positioned below the two shaft ends of the riding wheel 71.
Wherein each of the adjustment assemblies includes an adjustment bolt 74 and a plurality of fixing nuts 75 fitted with the adjustment bolt 74, the adjustment bolt 74 is passed through the upper bracket 73 and the lower bracket 76, and the space between the upper bracket 73 and the lower bracket 76 is locked by the fixing nuts 75.
The upper bracket 73 is provided with four upper adjusting holes 73a which are vertically penetrated and are matched with the adjusting assemblies one by one, the upper adjusting holes 73a are formed as oblong holes, the length direction of the upper adjusting holes 73a is parallel to the axial direction of the riding wheel 71, and the adjusting bolts 74 penetrate the upper adjusting holes 73a.
This embodiment has the following advantages:
the graphite packing 66, the compressed air and the framework oil seal 63 constitute a three-stage sealing structure (a leakage-proof sealing structure 6 shown in fig. 2), and the valve shaft 5 is driven by the cylinder 1 to move horizontally (axially) in close contact with the three-stage sealing structure.
The primary sealing scheme is as follows: the graphite packing 66 is in surface contact with the inner circular surface of the valve shaft 5, and the graphite packing 66 is made of graphite and has a lubricating effect, so that the valve shaft 5 can horizontally move while the sealing performance of the valve shaft 5 is ensured.
The secondary sealing scheme is as follows: the compressed air connector 69 is connected with an air compressor or other pressure air sources, high-pressure air enters a gap between the air seal ring 67 and the valve shaft 5 through the ventilation holes 68 and the ventilation holes of the air seal ring 67, and 0.4-0.6MPa of compressed air is introduced into the air seal ring 67, so that the internal air pressure of the air seal ring 67 is larger than the air pressure of the RTO 10, and the waste gas in the RTO 10 is ensured not to escape to the outside of the equipment through air pressure difference, so that a good sealing effect is achieved.
The three-stage sealing scheme is as follows: the skeleton oil seal 63 is in line contact with the valve shaft 5, and under the action of the RTO internal and external pressure difference, a crescent surface is formed at the contact part of the sealing lip of the skeleton oil seal 63 and the valve shaft 5, so that the leakage of waste gas is prevented, and the valve shaft 5 is sealed.
In the above-mentioned tertiary sealed design scheme, mutually complement between the tertiary seal, not only can avoid the inside 10 waste gas of RTO to leak outside, guarantee moreover that switching valve shaft 5 has certain freedom of movement, slow down the wearing and tearing of switching valve shaft 5, prolong the life of valve shaft 5, reach the effect of half the effort.
The flexible connection structure 2 is arranged in the embodiment, the valve shaft 5 is connected with the Y-shaped connector 21 through a thread pair, the fish-eye connector 23 is connected with the telescopic rod of the air cylinder 1 through a thread pair, the Y-shaped connector 21 is connected with the fish-eye connector 23 through a connector pin shaft 22, the telescopic rod of the air cylinder 1 pushes the valve shaft 5 to horizontally move, even if the valve shaft 5 is not concentric with the telescopic rod of the air cylinder 1, enough axial driving force can be obtained, the concentricity is automatically found in the moving process, the concentricity deviation is compensated, the good sealing of the switching valve is ensured, and meanwhile, a plurality of defects of rigid connection of the valve shaft 5 and the telescopic rod of the air cylinder 1 are avoided.
The switching valve shaft 5 is connected with the Y-shaped joint 21 through a screw pair, and the fish-eye joint 23 is connected with the telescopic rod of the air cylinder 1 through a screw pair, so that the valve shaft 5 is ensured not to be off-axis in the axial operation process.
As shown in fig. 3-5, the clamping groove 31a of the first anti-falling clamping piece 31 is used for clamping the valve shaft 5 and is fixed with the Y-shaped joint 21 through the first fixing screw 32, so that the valve shaft 5 and the Y-shaped joint 21 are integrated and can coaxially move.
As shown in fig. 3, 4 and 6, the second clamping groove 41a of the second anti-falling clamping piece 41 is used for clamping the fisheye fitting 23 and is fixed with the fixing base plate 43 of the telescopic rod of the air cylinder 1 through the second fixing screw 42, so that the fisheye fitting 23 and the telescopic rod of the air cylinder 1 are fixed and can coaxially move. The problem of loosening and shaft release is solved by utilizing the first anti-release structure 3 and the second anti-release structure 4. The interlocking structure design gives full play to the respective advantages of the thread pair and the anti-drop structure, and effectively solves the problem that the switching valve drops off in long-term movement on the premise of not influencing the axial movement and the radial movement of the valve shaft 5.
As shown in fig. 1, 7 and 8, the adjustable riding wheel 71 supports the valve shaft 5 to horizontally move, and the riding wheel 71 is connected with the upper bracket 73 through the shaft pin 72, namely the riding wheel 71 can rotate; the upper bracket 73 is connected with the lower bracket 76 through an adjusting bolt 74, namely, the riding wheel 71 is longitudinally adjustable (vertically adjustable); the upper bracket 73 is provided with an upper adjustment hole 73a, i.e., the riding wheel 71 is laterally adjustable (horizontally adjustable). Through the longitudinal and transverse positions of the supporting roller 71, the valve shaft 5 and the anti-leakage sealing structure 6 (three-stage sealing assembly) are always concentric, the three-stage sealing effect is guaranteed, the abrasion of the valve shaft 5 is reduced, and the service life of the valve shaft 5 is prolonged.
The foregoing is a preferred embodiment of the present invention, and various changes and modifications may be made therein by those skilled in the art without departing from the general inventive concept, and such changes and modifications should be considered as falling within the scope of the present invention as defined in the appended claims.

Claims (9)

1. A tower three-chamber RTO switching valve mechanism comprising:
a cylinder (1) mounted outside the RTO chamber;
a round rod-shaped valve shaft (5) horizontally penetrating through the RTO outer wall (11) and extending into the RTO interior (10), and a telescopic rod of the air cylinder (1) is connected with the valve shaft (5);
a switching valve plate (8) which is used for opening and closing the valve port (9) and is used for fixing the sleeve valve shaft (5) and is positioned in the RTO (10);
characterized by further comprising:
the anti-leakage sealing structure (6) is integrally of an annular structure and seals a fit gap between the valve shaft (5) and the RTO outer wall (11);
a flexible connection structure (2);
the flexible connecting structure is characterized in that the flexible connecting structure (2) is movably connected with the telescopic rod and the valve shaft (5) of the air cylinder (1) and comprises a Y-shaped connector (21), a connector pin shaft (22) and a fish eye connector (23), the Y-shaped connector (21) is in threaded connection with the valve shaft (5), the fish eye connector (23) is in threaded connection with the telescopic rod of the air cylinder (1), a joint ball bearing of the fish eye connector (23) is located in a U-shaped groove of the Y-shaped connector (21), and the connector pin shaft (22) is movably connected with the joint ball bearing of the Y-shaped connector (21) and the fish eye connector (23) in a penetrating mode.
2. The tower three-chamber RTO switching valve mechanism of claim 1, wherein: the valve shaft (5) is provided with a first anti-falling structure (3) at the connecting part of the Y-shaped joint (21), the first anti-falling structure (3) comprises a first anti-falling clamping piece (31) which is a bending plate integrally, the first anti-falling clamping piece (31) is provided with a first U-shaped clamping groove (31 a), the first clamping groove (31 a) is detachably fixed with the sleeved valve shaft (5) in a direction perpendicular to the axis of the valve shaft (5), and the first anti-falling clamping piece (31) is detachably fixedly connected with the Y-shaped joint (21).
3. A tower three chamber RTO switching valve mechanism as defined in claim 2, wherein: the anti-falling clamping piece I (31) is integrally an L-shaped bending plate and is divided into two mutually perpendicular parts, one part of the anti-falling clamping piece I (31) is perpendicular to the valve shaft (5) and provided with a clamping groove I (31 a), the other part of the anti-falling clamping piece I (31) is parallel to the valve shaft (5) and provided with a long round hole I (31 b), the long round hole I (31 b) is parallel to the valve shaft (5), the anti-falling structure I (3) is further provided with a fixing screw I (32), and the fixing screw I (32) is matched with the long round hole I (31 b) in a penetrating mode and is in threaded connection with the Y-shaped joint (21).
4. A tower three chamber RTO switching valve mechanism as defined in claim 2, wherein: the fish-eye joint (23) is provided with a second anti-falling structure (4) at the connection part of the telescopic rod of the air cylinder (1), the second anti-falling structure (4) comprises a second anti-falling clamping piece (41) and a fixed base plate (43), the second anti-falling clamping piece (41) is integrally a bending plate and is provided with a second U-shaped clamping groove (41 a), the second clamping groove (41 a) is detachably fixed and sleeved with the fish-eye joint (23) in a direction perpendicular to the axis of the valve shaft (5), the fixed base plate (43) is fixedly sleeved with the telescopic rod of the air cylinder (1), and the second anti-falling clamping piece (41) is detachably and fixedly connected with the fixed base plate (43).
5. The tower three-chamber RTO switching valve mechanism of claim 4, wherein: the second anti-falling structure (4) comprises a second fixing screw (42) sleeved with a nut, a second fixing hole (41 b) is formed in the second anti-falling clamping piece (41), and the second fixing screw (42) penetrates through the second fixing hole (41 b) and is connected with the fixing base plate (43) in a penetrating mode and is locked by the nut.
6. The tower three-chamber RTO switching valve mechanism of claim 1, wherein:
the leak-proof sealing structure (6) comprises:
an annular main seat (610) fixedly attached to the RTO outer wall (11), wherein the annular main seat (610) surrounds the valve shaft (5);
the valve shaft (5) is movably penetrated with the graphite packing (66) along the axial direction and takes the graphite packing (66) as a sliding support, and the graphite packing (66) is provided with a pair of graphite packing (66) and is distributed at intervals along the axial direction;
annular, encircle air seal ring (67) of valve shaft (5), a pair of graphite packing (66) relatively centre gripping air seal ring (67) in the axial, air seal ring (67) is furnished with compressed air connector (69), annular main seat (610) are pegged graft to compressed air connector (69), annular main seat (610) are equipped with vent (68) along its radial extension, the bleeder vent has been seted up to air seal ring (67), compressed air connector (69) are put through with the air compressor machine, compressed air connector (69), vent (68), the bleeder vent of air seal ring (67) are put through in proper order to fill in the fit clearance between air seal ring (67) and valve shaft (5) and have the high-pressure seal gas that the pressure value is greater than inside (10) atmospheric pressure of RTO.
7. The tower three-chamber RTO switching valve mechanism of claim 6, wherein: the leak-proof sealing structure (6) further comprises:
the gland group consists of an annular first gland (62) and a second gland (64), the gland group is provided with a plurality of locking screws (61) which encircle the valve shaft (5) and are distributed along the circumferential direction, the first gland (62), the second gland (64) and the annular main seat (610) are sequentially distributed along the axial direction of the valve shaft (5), and the locking screws (61) penetrate through the first gland (62) and the second gland (64) and are in threaded connection with the annular main seat (610) so that the gland group is fixedly connected with the outer shaft end of the annular main seat (610);
an annular framework oil seal (63), wherein an annular groove is coaxially formed on the inner circular edge of the first gland (62), the framework oil seal (63) is fixed in the annular groove, and the inner circular side of the framework oil seal (63) is sealed and attached to the valve shaft (5) under the locking action of a locking screw (61);
the second gland (64) is provided with an axial convex part protruding towards the RTO inside (10), and the axial convex part of the second gland (64) presses the gasket (65) against one of the graphite packing (66) under the locking action of the locking screw (61).
8. The tower three-chamber RTO switching valve mechanism of claim 1, wherein: at least two sets of adjustable riding wheel structures (7) positioned in the RTO (10);
the riding wheel structure (7) comprises:
a riding wheel (71) for rolling and supporting the valve shaft (5);
an upper bracket (73), wherein the upper bracket (73) is provided with a shaft pin (72), and the riding wheel (71) is rotatably connected to the upper bracket (73) through the shaft pin (72);
a lower bracket (76) which is positioned right below the upper bracket (73);
the upper bracket (73) is connected with the lower bracket (76) in a lifting and adjusting mode through the adjusting components, the two adjusting components are symmetrically distributed by taking the central axis of the riding wheel (71) as a standard, and the number of each adjusting component is two and is respectively positioned below the two shaft ends of the riding wheel (71);
wherein each adjusting assembly comprises an adjusting bolt (74) and a plurality of fixing nuts (75) sleeved with the adjusting bolts (74), wherein the adjusting bolts (74) penetrate through the upper bracket (73) and the lower bracket (76), and the fixing nuts (75) lock the distance between the upper bracket (73) and the lower bracket (76).
9. The tower three-chamber RTO switching valve mechanism of claim 8, wherein: the upper bracket (73) is provided with four upper adjusting holes (73 a) which are vertically communicated and are matched with the adjusting assemblies one by one, the upper adjusting holes (73 a) are arranged into oblong holes, the length direction of the upper adjusting holes is parallel to the axial direction of the riding wheel (71), and the adjusting bolts (74) penetrate through the upper adjusting holes (73 a).
CN202311176817.XA 2023-09-13 2023-09-13 Tower three-chamber RTO switching valve mechanism Pending CN117072751A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311176817.XA CN117072751A (en) 2023-09-13 2023-09-13 Tower three-chamber RTO switching valve mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311176817.XA CN117072751A (en) 2023-09-13 2023-09-13 Tower three-chamber RTO switching valve mechanism

Publications (1)

Publication Number Publication Date
CN117072751A true CN117072751A (en) 2023-11-17

Family

ID=88717050

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311176817.XA Pending CN117072751A (en) 2023-09-13 2023-09-13 Tower three-chamber RTO switching valve mechanism

Country Status (1)

Country Link
CN (1) CN117072751A (en)

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