CN111457107A - Large-scale high-temperature release valve with quick-replaceable driving device - Google Patents

Abstract

The invention relates to a large-scale high-temperature release valve capable of quickly replacing a driving device, which comprises a valve body, a valve plate and a valve plate driving mechanism, wherein the valve body is provided with a valve seat; the valve plate driving mechanism consists of a bidirectional buffer driving device, a transmission shaft, a driving arm and a connecting arm; a push rod of the bidirectional buffer driving device is hinged with one end of a driving arm, and the other end of the driving arm is connected with a transmission shaft through an open elastic shaft hub; one end of the connecting arm is connected with the transmission shaft through a split shaft hub, and the connecting arm is fixedly connected with one of the half shaft hubs; the other end of the connecting arm is connected with the valve plate; under the drive of the bidirectional buffer driving device, the driving arm drives the transmission shaft to rotate, and further drives the coupling arm and the valve plate to integrally rotate. The invention can realize the integral quick replacement of the transmission shaft, the connecting arm and the valve plate, further prolong the service life of the transmission shaft bearing and the valve port rubber sealing ring, improve the precision of the rotating position of the valve plate and ensure the safety of operating personnel.

Description

Large-scale high-temperature release valve with quick-replaceable driving device

Technical Field

The invention relates to the technical field of high-temperature valves, in particular to a large high-temperature release valve with a driving device capable of being replaced quickly.

Background

In an emergency, a main valve on a dust removal pipeline needs to be closed by a smoke dust release system of the lime shaft kiln, and a smoke gas release valve on the smoke dust pipeline is opened to release smoke dust in a kiln chamber; the smoke release valve needs to be used in a high-temperature and dust environment, the sealing performance requirement when the smoke release valve is closed is higher, maintenance personnel need to enter the valve to operate when the smoke release valve is overhauled and maintained, and the smoke release valve mainly carries out regular replacement on a bearing and a sealing rubber piece.

At present, the structure of the commonly used smoke release valve has the following defects: firstly, because the temperature is higher (sometimes exceeds 200 ℃) when the flue gas is exhausted from the kiln chamber, the dust amount is also larger, so that the service life of a bearing of a driving shaft in the flue gas release valve and a rubber sealing ring of a valve port is greatly influenced, particularly in recent years, large-scale kilns adopting low-calorific-value fuel are developed and applied successively, the exhaust amount of the flue gas is increased, the caliber of the valve is increased, the replacement of vulnerable parts on the valve is more and more difficult, and a large amount of overhaul time and labor force are generally consumed; in addition, when replacing these valve internal parts, it is necessary for the operator to enter the valve duct in the kiln body, which is very dangerous.

Disclosure of Invention

The invention provides a large-scale high-temperature release valve with a quick-replaceable driving device, which can realize the integral quick replacement of a transmission shaft, a connecting arm and a valve plate, further prolong the service life of a transmission shaft bearing and a valve port rubber sealing ring, improve the rotating position precision of the valve plate and ensure the safety of operators.

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

a large-scale high-temperature release valve capable of quickly replacing a driving device comprises a valve body, a valve plate and a valve plate driving mechanism; the smoke outlet is arranged at the other end of the valve body, the valve plate is arranged in the valve body, and the valve plate can be driven by the valve plate driving mechanism to rotate and close or open the smoke outlet; the valve plate driving mechanism consists of a bidirectional buffer driving device, a transmission shaft, a driving arm and a connecting arm; the body of the bidirectional buffer driving device is connected with the valve shell, a push rod of the bidirectional buffer driving device is hinged with one end of a driving arm, the other end of the driving arm is connected with a transmission shaft through an opening elastic shaft hub, and an opening of the opening elastic shaft hub is locked and fixed with the transmission shaft through a connecting bolt; one end of the connecting arm is connected with the transmission shaft through a split shaft hub, the split shaft hub consists of 2 half shaft hubs which are oppositely arranged, the 2 half shaft hubs are combined together through bolts and fixedly connected with the transmission shaft, and the connecting arm is fixedly connected with one of the half shaft hubs; the other end of the connecting arm is connected with the valve plate; under the drive of the bidirectional buffer driving device, the driving arm drives the transmission shaft to rotate, and further drives the coupling arm and the valve plate to integrally rotate.

The valve shell is provided with a base trunnion, the body of the bidirectional buffer driving device is provided with a base, and the base trunnion are rotationally connected through a base joint bearing; a single lug ring is arranged on a push rod of the bidirectional buffer driving device and is connected with the driving arm through a pin shaft, and the single lug ring is rotatably connected with the pin shaft through a head joint bearing.

The bidirectional buffer driving device is a hydraulic cylinder, an electro-hydraulic push rod or an electric push rod.

A large-scale high-temperature release valve capable of quickly replacing a driving device also comprises a valve body sealing structure; a connecting pipe section for connecting with an external flue gas pipeline is arranged at a flue gas outlet of the valve body, a sealing ring bottom plate is arranged on one side of the valve plate corresponding to the inner end of the connecting pipe section, the high-temperature-resistant rubber sealing ring is arranged in a clamping groove of the sealing ring bottom plate, and the inner side of the high-temperature-resistant rubber sealing ring is fixedly pressed by 3 annular pressing plates; the central angles of the 3 annular pressing plates are all 120 degrees; the annular pressure plate is fixedly connected with the valve plate through bolts, and the bolt holes in the annular pressure plate are long holes along the direction of the symmetrical center line of the annular pressure plate.

A large-scale high-temperature release valve capable of quickly replacing a driving device also comprises a cooling air system; the cooling air system consists of a cooling air main pipe, a cooling air branch pipe, an annular air storage and distribution box and a plurality of nozzles; the annular gas storage and distribution box is arranged on the outer side of the connecting pipe section, a plurality of cooling air inlets are formed in the annular gas storage and distribution box along the circumferential direction, the cooling air inlets are respectively connected with a cooling air main pipe through corresponding cooling air branch pipes, and the cooling air main pipe is additionally connected with an external cooling air supply system; the bottom of annular gas storage divides the gas tank is equipped with a plurality of nozzles along circumference, and the injection direction of nozzle is towards high temperature resistant rubber seal.

A large-scale high-temperature release valve capable of quickly replacing a driving device also comprises a valve body elastic supporting structure; the valve body elastic supporting structure consists of 2 groups of elastic supporting seats arranged on two sides of the valve body; each group of elastic supporting seats consists of a supporting beam, a supporting base plate, a guide shaft, a plurality of belleville springs, a guide shaft base, a stop dog and an adjusting gasket group; the two sides of the valve body are respectively provided with a support beam, the top of the support beam is provided with a support bottom plate, the top of the support bottom plate is provided with a guide shaft base, the lower end of the guide shaft is fixed in a shaft hole on the guide shaft base, and the outer side of the guide shaft base is provided with a stop dog; the butterfly springs are sleeved on the guide shaft in a pairwise opposite manner, and the guide shaft between the butterfly springs and the guide shaft base is provided with an adjusting gasket group; the valve body supports on the two sides of the valve body are sleeved on the guide shaft at the top of the belleville spring through the through hole.

A large-scale high-temperature release valve capable of quickly replacing a driving device also comprises a transmission shaft supporting structure; the transmission shaft supporting structure comprises 2 groups of supporting seats arranged at two ends of the transmission shaft; two ends of the transmission shaft extend out of two sides of the valve body and are supported by the supporting seat; each group of supporting seats comprises a bearing seat support, a bearing seat and double-row roller bearings, the bearing seat supports are fixed on the valve shell, the bearing seats are fixed on the bearing seat supports, the corresponding ends of the transmission shafts penetrate through shaft holes corresponding to the bearing seats, and the double-row roller bearings are arranged between the transmission shafts and the shaft holes of the bearing seats.

A large-scale high-temperature release valve capable of quickly replacing a driving device also comprises an inspection and observation door; the maintenance observation door consists of a connecting steel plate, a door body, a rotating pin shaft, a sealing pressure plate, a heat insulation layer and a manual screw door lock mechanism; the connecting steel plate is fixedly connected with the valve shell, the door body is rotatably connected with the connecting steel plate through a rotating pin shaft, a sealing pressure plate and a heat insulation layer are arranged on one side of the door body, which faces the valve body, a door hole is correspondingly formed in the valve body, a door edge sealing ring is arranged at the door hole, and the sealing pressure plate is matched with the door edge sealing ring to realize sealing; the maintenance observation door and the valve body are locked and fixed through a manual screw door lock mechanism.

A large-scale high-temperature release valve capable of quickly replacing a driving device also comprises a valve plate position detection device; the valve plate position detection device consists of a rotary encoder, an encoder connecting shaft, a coupler and an encoder bracket; the encoder support is arranged on the outer side of the shaft end of the transmission shaft, the body of the rotary encoder is fixed on the encoder support, the corresponding end of the transmission shaft is coaxially provided with an encoder connecting shaft, and the detection shaft of the rotary encoder is connected with the encoder connecting shaft through a shaft coupling.

A large-scale high-temperature release valve capable of quickly replacing a driving device also comprises a maintenance protection device; the maintenance protection device comprises a safety protection plate and a protection plate fixing frame; the guard plate mount is installed in the valve body that is close to flue gas entry one side, and the safety protection board is a plurality of, hangs the dress side by side and forms interim maintenance platform on the guard plate mount when overhauing.

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

1) the connecting arm is provided with a split shaft hub which can be quickly separated from the valve plate and the transmission shaft; the driving arm can also be quickly separated from the transmission shaft and the bidirectional buffer driving device, so that the valve plate and the transmission shaft can be quickly disassembled; the opening elastic shaft hub is arranged on the driving arm, the fastening force can be adjusted, the problem that the driving arm is difficult to replace due to thermal expansion, installation error and pipeline stress deformation in the production process can be thoroughly solved, and the smooth operation of equipment maintenance is ensured.

2) The drive device of the valve plate adopts a bidirectional buffer drive device, the bidirectional buffer drive device is respectively provided with a deceleration buffer section at two stroke end points close to the opening and closing of the valve plate, the buffer distance is within 25mm, the accuracy and no impact of the end point position of the valve plate are ensured, the close fitting of the annular compression ring and the high-temperature resistant rubber sealing ring is ensured, the good sealing property of the valve is ensured, and meanwhile, the service life of the high-temperature resistant rubber sealing ring is also favorably prolonged.

3) The cooling air system is arranged, so that the high-temperature resistant rubber sealing ring can be ensured to be used in a high-temperature working condition environment of 200 ℃. The cooling air system can be interlocked with the computer control system for control, the air supply quantity is controlled according to the feedback signal of the temperature in the valve body, a plurality of nozzles are uniformly distributed on the annular air storage and distribution box, the high-temperature-resistant rubber sealing ring can be effectively cooled, the service life of the high-temperature-resistant rubber sealing ring is greatly prolonged, and therefore the sealing property in the kiln chamber after the valve plate is closed is ensured, the kiln chamber pressure maintaining is facilitated, the smoke and dust are prevented from leaking, and the environment protection is facilitated.

4) High temperature resistant rubber seal compresses tightly fixedly through 3 annular clamp plates, and bolt fastening department adopts rectangular hole, conveniently adjusts and changes, can prevent to reveal because of the high-temperature gas in the valve that the skew center of sealing washer leads to, avoids influencing kiln internal pressure, stops the pollution problem that the flue gas leaked and brought.

5) The elastic supporting structure arranged outside the valve body is used for bearing the weight of the whole valve body, and can eliminate various stress distortion deformation of each part of the valve body when the valve plate is subjected to factors such as high temperature, vibration, temperature change, installation error and the like of a kiln chamber smoke exhaust system, so that the normal operation of equipment is ensured.

6) The transmission shaft supporting device is arranged outside the valve body, so that fine powder can be completely prevented from leaking along a bearing gap due to positive pressure in the valve body and causing serious damage to the rotation of the bearing after hardening in the bearing, and the corrosion of high-temperature smoke in the valve body to the bearing can be prevented; although the external structure can cause the problems of increased overall dimension of equipment, increased occupied space and little increased cost, the service life of the bearing can be greatly prolonged, and the stable operation of the whole production line is very favorable, so the structure is suitable for occasions with high temperature or higher requirements on the service life of the bearing.

7) The maintenance observation door is provided with a heat insulation and sealing structure, so that the problem of deformation and air leakage of the door body caused by high temperature in the valve body can be avoided, and the opening and closing mode of the manual screw door lock mechanism is simple and convenient.

8) The high-precision rotary encoder is adopted to replace a commonly used corner travel control switch, so that the control precision of the rotating position of the valve plate can be greatly improved, the problem of low repeated positioning precision of the valve plate caused by the change of conditions such as environmental temperature and the like is solved, the position of the valve plate closed in the valve is accurately controlled, and the sealing and air leakage are ensured.

9) In order to ensure the personal safety of the operating personnel who enter the valve body for overhauling and observing the equipment, an overhauling and protecting device is arranged. The safety protection plate is temporarily erected on the protection plate fixing frame during maintenance, the outer side of the safety protection plate is erected on the inner ring structure of the valve body to form an operation platform, maintenance operation is conveniently carried out, and the safety of operators can be guaranteed.

Drawings

FIG. 1 is a front view of a large high temperature relief valve with a quick change actuator according to the present invention.

Fig. 2 is a left side view of fig. 1.

Fig. 3 is a top view of fig. 1.

Figure 4 is a schematic view of the structure of the drive arm of the present invention.

Fig. 5 is a view from direction a in fig. 4.

Fig. 6 is a sectional view B-B in fig. 3.

Fig. 7 is a cross-sectional view taken along line D-D in fig. 6.

Fig. 8 is a view in the direction of C in fig. 1.

Fig. 9 is a sectional view a-a in fig. 6.

Fig. 10 is an enlarged view of a portion i in fig. 2.

Fig. 11 is an enlarged view of a portion ii in fig. 2.

Fig. 12 is an enlarged view of the portion iii in fig. 6.

FIG. 13 is a schematic diagram of the construction of the annular pressure plate of the present invention.

In the figure: 1. 1-1 driving arm, 1-2 coupling bolt, 1-3 fastening nut, 1-4 locking washer, 1-5 screw, 1-6 open elastic shaft hub, 1-7 coupling arm plate, 2 rib plate, 2-1 coupling arm, 2-2 cover plate coupling arm, 2-3 split shaft hub, 2-4 bolt, 2-5 fastening nut, 2-6 washer, 2-7 bush, 3 plain key, 3-1 cooling air system, 3-2 cooling air flange, 3-3 cooling air inlet, 3-4 cooling air main pipe, 3-5 cooling air branch pipe, 3-6 coupling bolt, 3-7 nut, 3-8 elastic washer, 3-9 flange sealing gasket, 3-10 annular air storage gas distribution box, 3-11 bolt, 3-11 elastic air main pipe 3-12 parts of gasket, 3-13 parts of nozzle, 4-1 parts of valve body sealing structure, 4-2 parts of high-temperature resistant rubber sealing ring, 4-3 parts of annular pressing plate, 4-4 parts of sealing ring bottom plate, 4-5 parts of bolt, 4-6 parts of nut, 4-7 parts of gasket, 4-7 parts of valve plate, 5-1 parts of valve body elastic supporting structure, 5-2 parts of guide shaft, 5-3 parts of belleville spring, 5-4 parts of adjusting gasket group, 5-5 parts of stop dog, 5-6 parts of guide shaft base, 5-7 parts of support bottom plate, 6-1 parts of support beam, 6-1 parts of transmission shaft supporting structure, 6-2 parts of O-shaped sealing ring, 6-3 parts of bearing seat, 6-4 parts of double-row roller bearing, 6-5 parts of bearing seat support, 6-6 parts of oil nozzle Bearing cap 6-10, bearing cap fixing bolt 6-11, washer 6-12, adapter sleeve 6-13, through cap O-shaped seal ring 6-14, bearing through cap 6-15, shaft shoulder baffle ring 6-16, transmission shaft 7, inspection observation door 7-1, seal press plate 7-2, thermal insulation layer 7-3, manual screw door lock mechanism 7-4, rotating pin shaft 7-5, door edge seal ring 7-6, connecting steel plate 8, inspection protection device 8-1, safety protection plate 8-2, protection plate fixing frame 9, valve plate position detection device 9-1, rotary encoder 9-2, coupler 9-3, encoder connecting shaft 9-4, encoder support 10, bidirectional buffer driving device 10-1, driving oil cylinder 10-2, oil cylinder mounting adjusting washer 10-2 10-3 parts of oil cylinder base 10-4 parts of base joint bearing 10-5 parts of base trunnion 10-6 parts of rotation stop baffle 10-7 parts of pin shaft 10-8 parts of single lug ring 10-9 parts of lubricating oil nozzle 10-10 parts of head joint bearing 10-11 parts of split pin 10-12 parts of gasket 10-13 parts of stop snap ring 10-14 parts of stop screw 11 parts of valve body support 12 parts of valve shell 13 parts of safety protection net

Detailed Description

The following further describes embodiments of the present invention with reference to the accompanying drawings:

as shown in fig. 1-3, the large-scale high-temperature release valve with a quick-replaceable driving device comprises a valve body, valve plates 4-7 and a valve plate driving mechanism; one end of the valve body is provided with a smoke inlet, the other end of the valve body is provided with a smoke outlet, the valve plate 4-7 is arranged in the valve body, and the valve plate 4-7 can be driven by the valve plate driving mechanism to rotate and close or open the smoke outlet; the valve plate driving mechanism consists of a bidirectional buffer driving device 10, transmission shafts 6-16, a driving arm 1 and a connecting arm 2; the body of the bidirectional buffer driving device 10 is connected with the valve shell 12, a push rod of the bidirectional buffer driving device 10 is hinged with one end of a driving arm 1, the other end of the driving arm 1 is connected with a transmission shaft 6-16 through an open elastic shaft hub 1-5 (shown in figure 4), and the opening of the open elastic shaft hub 1-5 is locked and fixed with the transmission shaft 6-16 through a connecting bolt 1-1 (shown in figure 5); one end of the connecting arm 2 is connected with the transmission shafts 6-16 through a split shaft hub 2-2 (shown in figure 6), the split shaft hub 2-2 consists of 2 half shaft hubs which are oppositely arranged, 2 half shaft hubs are held together through bolts 2-3 and are fixedly connected with the transmission shafts 6-16 (shown in figure 7), and the connecting arm 2 is fixedly connected with one of the half shaft hubs; the other end of the connecting arm 2 is connected with a valve plate 4-7; under the drive of the bidirectional buffer driving device 10, the driving arm 1 drives the transmission shafts 6 to 16 to rotate, and further drives the connecting arm 2 and the valve plates 4 to 7 to integrally rotate.

As shown in fig. 1, a base trunnion 10-5 is arranged on the valve shell 12, a base is arranged on the body of the bidirectional buffer driving device 10, and the base is rotatably connected with the base trunnion 10-5 through a base joint bearing 10-4; as shown in fig. 11, a single lug ring 10-8 is arranged on a push rod of the bidirectional buffer driving device 10, the single lug ring 10-8 is connected with the driving arm 1 through a pin shaft 10-7, and the single lug ring 10-8 is rotatably connected with the pin shaft 10-7 through a head joint bearing 10-10.

The bidirectional buffer driving device 10 is a hydraulic cylinder, an electro-hydraulic push rod or an electric push rod.

As shown in fig. 1 and 6, the large-scale high-temperature release valve capable of rapidly replacing the driving device further comprises a valve body sealing structure 4; a connecting pipe section for connecting with an external flue gas pipeline is arranged at a flue gas outlet of the valve body, a sealing ring bottom plate 4-3 is arranged on one side of the valve plate 4-7 corresponding to the inner end of the connecting pipe section, a high-temperature resistant rubber sealing ring 4-1 is arranged in a clamping groove of the sealing ring bottom plate 4-3, and the inner side of the high-temperature resistant rubber sealing ring 4-1 is pressed and fixed by 3 annular pressing plates 4-2; the central angles of the 3 annular pressure plates 4-2 are all 120 degrees (as shown in figure 13); the annular pressure plate 4-2 is fixedly connected with the valve plate 4-7 through bolts 4-4, and bolt holes in the annular pressure plate 4-2 are long holes along the direction of the symmetrical center line of the annular pressure plate.

As shown in fig. 3 and 12, the large-scale high-temperature release valve capable of rapidly replacing the driving device further comprises a cooling air system 3; the cooling air system 3 consists of a cooling air main pipe 3-3, a cooling air branch pipe 3-4, an annular air storage and distribution box 3-9 and a plurality of nozzles 3-13; the annular gas storage and distribution box 3-9 is arranged on the outer side of the connecting pipe section, a plurality of cooling air inlets are formed in the annular gas storage and distribution box 3-9 along the circumferential direction, the cooling air inlets are respectively connected with a cooling air main pipe 3-3 through corresponding cooling air branch pipes 3-4, and the cooling air main pipe 3-3 is additionally connected with an external cooling air supply system; the bottom of the annular gas storage and distribution box 3-9 is circumferentially provided with a plurality of nozzles 3-13, and the spraying direction of the nozzles 3-13 faces the high-temperature resistant rubber sealing ring 4-1.

As shown in fig. 8, the large-scale high-temperature release valve capable of rapidly replacing the driving device further comprises a valve body elastic supporting structure 5; the valve body elastic supporting structure 5 consists of 2 groups of elastic supporting seats arranged on two sides of the valve body; each group of elastic supporting seats comprises a supporting seat beam 5-7, a supporting seat bottom plate 5-6, a guide shaft 5-1, a plurality of belleville springs 5-2, a guide shaft base 5-5, a stop dog 5-4 and an adjusting gasket group 5-3; two sides of the valve body are respectively provided with a support beam 5-7, the top of the support beam 5-7 is provided with a support bottom plate 5-6, the top of the support bottom plate 5-6 is provided with a guide shaft base 5-5, the lower end of the guide shaft 5-1 is fixed in a shaft hole on the guide shaft base 5-5, and the outer side of the guide shaft base 5-5 is provided with a stop dog 5-4; the butterfly springs 5-2 are sleeved on the guide shaft 5-1 in a pairwise opposite manner, and the guide shaft 5-1 between the butterfly springs 5-2 and the guide shaft base 5-5 is provided with an adjusting gasket group 5-3; the valve body support 11 at the two sides of the valve body is sleeved on the guide shaft 5-1 at the top of the belleville spring 5-2 through a through hole.

As shown in fig. 2 and 10, the large-scale high-temperature release valve capable of rapidly replacing the driving device further comprises a transmission shaft supporting structure 6; the transmission shaft supporting structure 6 comprises 2 groups of supporting seats arranged at two ends of a transmission shaft 6-16; two ends of the transmission shafts 6-16 extend out of two sides of the valve body and are supported by the supporting seat; each group of supporting seats comprises a bearing seat support 6-4, a bearing seat 6-2 and a double-row roller bearing 6-3, the bearing seat support 6-4 is fixed on the valve shell 12, the bearing seat 6-2 is fixed on the bearing seat support 6-4, the corresponding end of the transmission shaft 6-16 is arranged in the corresponding shaft hole of the bearing seat 6-2 in a penetrating manner, and the double-row roller bearing 6-3 is arranged between the transmission shaft 6-16 and the shaft hole of the bearing seat 6-2.

As shown in fig. 8, the large-scale high-temperature release valve capable of rapidly replacing the driving device further comprises an access observation door 7; the overhaul observation door 7 consists of a connecting steel plate 7-6, a door body, a rotating pin shaft 7-4, a sealing pressure plate 7-1, a heat insulation layer 7-2 and a manual screw door lock mechanism 7-3; the connecting steel plate 7-6 is fixedly connected with the valve shell 12, the door body is rotatably connected with the connecting steel plate 7-6 through a rotating pin shaft 7-4, a sealing pressure plate 7-1 and a heat insulation layer 7-2 are arranged on one side of the door body, which faces the valve body, a door hole is correspondingly formed in the valve body, a door edge sealing ring 7-5 is arranged at the door hole, and the sealing pressure plate 7-1 is matched with the door edge sealing ring 7-5 to realize sealing; the maintenance observation door 7 and the valve body are locked and fixed through a manual screw door lock mechanism 7-3.

As shown in fig. 2 and 3, the large-sized high-temperature release valve capable of rapidly replacing the driving device further comprises a valve plate position detection device 9; the valve plate position detection device 9 consists of a rotary encoder 9-1, an encoder connecting shaft 9-3, a coupler 9-2 and an encoder bracket 9-4; the encoder support 9-4 is arranged on the outer side of the shaft end of the transmission shaft 6-16, the body of the rotary encoder 9-1 is fixed on the encoder support 9-4, the corresponding end of the transmission shaft 6-16 is coaxially provided with an encoder connecting shaft 9-3, and the detection shaft of the rotary encoder is connected with the encoder connecting shaft 9-3 through a coupler 9-2.

As shown in fig. 6 and 9, the large-scale high-temperature release valve with the quick-replaceable driving device further comprises a maintenance protection device 8; the overhaul protection device 8 consists of a safety protection plate 8-1 and a protection plate fixing frame 8-2; the protective plate fixing frame 8-2 is arranged in the valve body close to one side of the smoke inlet, a plurality of safety protective plates 8-1 are arranged, and the safety protective plates are hung on the protective plate fixing frame 8-2 in parallel to form a temporary maintenance platform during maintenance.

The following examples are carried out on the premise of the technical scheme of the invention, and detailed embodiments and specific operation processes are given, but the scope of the invention is not limited to the following examples. The methods used in the following examples are conventional methods unless otherwise specified.

[ examples ] A method for producing a compound

In the embodiment, the large-scale high-temperature release valve with the quick replaceable driving device is used for opening and closing the smoke dust pipeline at the top of the kiln chamber in an emergency. The device comprises a driving arm 1, a connecting arm 2, a cooling air structure system 3, a valve body sealing structure 4, a valve body elastic supporting structure 5, a transmission shaft supporting structure 6, an inspection and observation door 7, an inspection and protection device 8, a valve plate position detection device 9 and a bidirectional buffer driving device 10, which can be replaced quickly; and a valve body support 11; a valve housing 12; a safety net 13, and the like.

The driving arm 1 adopts a structure which is easy to disassemble and replace on the basis of ensuring the driving force of transmission, and comprises an open elastic shaft hub 1-5, a connecting arm plate 1-6 and a rib plate 1-7 which are fastened on a transmission shaft 6-16 through a connecting bolt M16x901-1, a fastening nut M161-2 and a check washer 1-3; the screws 1-4 used for disassembly are matched with the corresponding threaded holes to form 2 groups. One end of the driving arm 1 is connected with the transmission shafts 6-16, and the other end is connected with the pin shaft 10-7 through a single lug ring 10-8 on the driving oil cylinder 10-1. The connecting part of the driving arm and the transmission shaft is positioned outside the valve body, and a safety protection net 13 is arranged outside the driving arm and the transmission shaft.

The connecting arm 2 is formed by welding a cover plate connecting arm 2-1 and a split shaft hub 2-2 together, the split shaft hub 2-2 is formed by 2 half hubs, one half hub is fixedly welded with the cover plate connecting arm 2-1, and the 2 half hubs are fastened on a transmission shaft 6-6 through a bolt 2-3, a fastening nut 2-4, a gasket 2-5, a bush 2-6 and the like (4 groups in total); the split type shaft hub 2-2 is connected with a transmission shaft 6-16 through a flat key 2-7, and when the transmission shaft 6-16 rotates, a connecting arm 2-1 fixed with the half shaft hub in a welding mode and a valve plate rotating pin shaft 4-8 drive a valve plate 4-7 to rotate, so that the valve is opened and closed.

The cooling air system 3 is connected with the air supply system through a cooling air flange 3-1, compressed cooling air enters the cooling air branch pipes 3-4 through a cooling air inlet 3-2, a cooling air main pipe 3-3 enters the annular air storage and distribution box 3-9 through the cooling air branch pipes 3-4, the compressed cooling air is sprayed out through a plurality of nozzles 3-13 uniformly arranged along the annular direction to cool the high-temperature resistant rubber sealing ring 4-1, the cooling air volume is controlled by a computer control system according to a temperature signal fed back by a temperature measuring device in the valve body, the feedback temperature is high, the air volume is large, otherwise, the air volume is small, and therefore the long-term reliable work of the high-temperature resistant rubber sealing ring 4-1 in the environment of high-temperature smoke (about 200 ℃) can be guaranteed. The pipelines are connected by flanges through connecting bolts 3-5, nuts 3-6, elastic washers 3-7 and flange sealing gaskets 3-8. The whole cooling air system 3 is arranged on a valve shell 12 through a group of bolts 3-10, elastic washers 3-11 and gaskets 3-12 which are uniformly distributed along the circumferential direction.

The valve body sealing structure 4 comprises a high-temperature-resistant rubber sealing ring 4-1 suitable for being used at the environment temperature of 200 ℃, the high-temperature-resistant rubber sealing ring is placed in a clamping groove of a sealing ring bottom plate 4-3, the inner side of the sealing ring bottom plate is tightly pressed by 3 annular pressing plates 4-2 which are at 120-degree angles and are uniformly arranged, and a strip hole formed in each annular pressing plate is used for adjusting the position of the annular pressing plate, so that the position precision of the high-temperature-resistant rubber sealing ring 4-1 is ensured, and the sealing performance of the high. After the position adjustment is finished, the high-temperature resistant rubber sealing ring 4-1, the sealing ring bottom plate 4-3, the annular pressing plate 4-2 and the like are connected and fixed together by using a bolt 4-4, a nut 4-5 and a gasket 4-6.

The valve body elastic supporting structure 5 is composed of two groups of supporting seats which are respectively supported on two sides of the valve body, the number of butterfly springs 5-2 in each group of supporting seats is 14, the uncompressed length of each group of butterfly springs 5-2 is 157mm, the compressed length is 119mm, every two butterfly springs 5-2 are oppositely sleeved on a guide shaft 5-1, the guide shaft 5-1 and a guide shaft base 5-5 are welded together, a stop dog 5-4 is used for limiting the horizontal movement of the guide shaft base 5-5, an adjusting gasket group 5-3 is used for adjusting the integral balance of the valve body by adjusting the initial position of the butterfly spring 5-2, the whole valve body and the valve body elastic supporting structure 5 are both located on a spring supporting bottom plate 5-6, and the spring calculating supporting bottom plate 5-6 is welded on a supporting base beam 5-7.

The drive shaft support structure 6, which positions the bearings outside the valve housing 12, includes a bearing block 6-2 mounted on a bearing block bracket 6-4 by bolts 6-7 and washers 6-8, with the bearing block bracket 6-4 being fixed to the valve housing 12. An O-shaped sealing ring 6-1 and a through cover O-shaped sealing ring 6-13 arranged on a bearing seat 6-4 are used for sealing grease in the bearing seat 6-4, a double-row roller bearing 6-3 is positioned by a shaft shoulder baffle ring 6-15, the position of the double-row roller bearing 6-3 is fixedly adjusted by a fastening sleeve 6-12, lubricating grease is added into the bearing by a grease nipple 6-5 and a grease nipple guide pipe 6-6 for lubricating the bearing, a bearing end cover 6-9 and a bearing through cover 6-14 are screwed and fixed on the bearing seat 6-2 by a bearing end cover fixing bolt 6-10 and a gasket 6-11, and the bearing and accessories thereof are arranged on a transmission shaft 6-16.

When the maintenance observation door 7 is closed, the maintenance observation door is rotated along the rotating pin shaft 7-4, after the sealing pressure plate 7-1 on the maintenance observation door is contacted with the door edge sealing ring 7-5, the manual screw door lock mechanism 7-3 is screwed, and the connecting steel plate 7-6 is welded on the valve shell 12.

The maintenance protection device 8 comprises a safety protection plate 8-1 temporarily arranged in the valve body, the safety protection plate is horizontally hung on the protection plate fixing frame 8-2, and the protection plate fixing frame 8-2 can prevent the safety protection plate from rotating. When parts in the valve body need to be replaced or the valve plates 4-7 need to be adjusted, an operator stands on the safety protection plate in the valve body to operate, the operator can be prevented from falling into a high-temperature pipeline below the safety protection plate, and personal safety of the operator is guaranteed.

The valve plate position detection device 9 adopts a high-precision rotary encoder 9-1, a detection shaft of the high-precision rotary encoder is connected with an encoder connecting shaft 9-3 through a coupler 9-2, and a rotary encoder body is fixed on a rotary encoder support 9-4. The valve plate position detection device 9 is used for detecting and accurately controlling the rotation position of the valve plate, and prevents gas leakage at the sealing position of the valve due to inaccurate rotation position of the valve plate.

In this embodiment, the bidirectional buffer driving device 10 includes a driving cylinder 10-1 (not limited to hydraulic cylinder driving, but also adopting driving methods such as an electro-hydraulic push rod, etc.), a cylinder base 10-3, a base joint bearing 10-4, a base trunnion 10-5, etc. The bidirectional buffer driving device 10 is used as a power source and is used for driving the driving arm 1 and driving the valve plates 4-7 to rotate through the connecting arm 2 so as to complete the opening and closing of the valve. The adjustment of the stroke end of the push rod of the oil cylinder is completed by installing 8 oil cylinders with 2mm and adjusting gaskets 10-2. The head of the oil cylinder adopts anti-loose screws 10-14 to fasten the single lug ring 10-8, the head joint bearing 10-10 can adapt to the distortion caused by installation errors, the rotation-stopping baffle 10-6 is used for preventing the rotation of the pin shaft 10-7, the cotter pin 10-11 and the gasket 10-12 are used for positioning the pin shaft 10-7, and the stop snap ring 10-13 is used for positioning the head joint bearing 10-10. The head joint bearing is lubricated by oil through a lubricating oil filling nozzle 10-9.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (10)

1. A large-scale high-temperature release valve capable of quickly replacing a driving device comprises a valve body, a valve plate and a valve plate driving mechanism; the smoke outlet is arranged at the other end of the valve body, the valve plate is arranged in the valve body, and the valve plate can be driven by the valve plate driving mechanism to rotate and close or open the smoke outlet; the valve plate driving mechanism is characterized by consisting of a bidirectional buffer driving device, a transmission shaft, a driving arm and a connecting arm; the body of the bidirectional buffer driving device is connected with the valve shell, a push rod of the bidirectional buffer driving device is hinged with one end of a driving arm, the other end of the driving arm is connected with a transmission shaft through an opening elastic shaft hub, and an opening of the opening elastic shaft hub is locked and fixed with the transmission shaft through a connecting bolt; one end of the connecting arm is connected with the transmission shaft through a split shaft hub, the split shaft hub consists of 2 half shaft hubs which are oppositely arranged, the 2 half shaft hubs are combined together through bolts and fixedly connected with the transmission shaft, and the connecting arm is fixedly connected with one of the half shaft hubs; the other end of the connecting arm is connected with the valve plate; under the drive of the bidirectional buffer driving device, the driving arm drives the transmission shaft to rotate, and further drives the coupling arm and the valve plate to integrally rotate.

2. The large-scale high-temperature release valve with the quick-replaceable driving device according to claim 1, wherein a base trunnion is arranged on the valve shell, a base is arranged on a body of the bidirectional buffering driving device, and the base is rotatably connected with the base trunnion through a base joint bearing; a single lug ring is arranged on a push rod of the bidirectional buffer driving device and is connected with the driving arm through a pin shaft, and the single lug ring is rotatably connected with the pin shaft through a head joint bearing.

3. The large-scale high-temperature release valve with the quick-replaceable driving device according to claim 1 or 2, wherein the bidirectional buffering driving device is a hydraulic cylinder, an electro-hydraulic push rod or an electric push rod.

4. The large-scale high-temperature release valve with the quick-replaceable driving device according to claim 1, characterized by further comprising a valve body sealing structure; a connecting pipe section for connecting with an external flue gas pipeline is arranged at a flue gas outlet of the valve body, a sealing ring bottom plate is arranged on one side of the valve plate corresponding to the inner end of the connecting pipe section, the high-temperature-resistant rubber sealing ring is arranged in a clamping groove of the sealing ring bottom plate, and the inner side of the high-temperature-resistant rubber sealing ring is fixedly pressed by 3 annular pressing plates; the central angles of the 3 annular pressing plates are all 120 degrees; the annular pressure plate is fixedly connected with the valve plate through bolts, and the bolt holes in the annular pressure plate are long holes along the direction of the symmetrical center line of the annular pressure plate.

5. The large scale quick change drive high temperature relief valve according to claim 1 further comprising a cooling air system; the cooling air system consists of a cooling air main pipe, a cooling air branch pipe, an annular air storage and distribution box and a plurality of nozzles; the annular gas storage and distribution box is arranged on the outer side of the connecting pipe section, a plurality of cooling air inlets are formed in the annular gas storage and distribution box along the circumferential direction, the cooling air inlets are respectively connected with a cooling air main pipe through corresponding cooling air branch pipes, and the cooling air main pipe is additionally connected with an external cooling air supply system; the bottom of annular gas storage divides the gas tank is equipped with a plurality of nozzles along circumference, and the injection direction of nozzle is towards high temperature resistant rubber seal.

6. The large-scale high-temperature release valve with the quick-replaceable driving device according to claim 1, characterized by further comprising a valve body elastic supporting structure; the valve body elastic supporting structure consists of 2 groups of elastic supporting seats arranged on two sides of the valve body; each group of elastic supporting seats consists of a supporting beam, a supporting base plate, a guide shaft, a plurality of belleville springs, a guide shaft base, a stop dog and an adjusting gasket group; the two sides of the valve body are respectively provided with a support beam, the top of the support beam is provided with a support bottom plate, the top of the support bottom plate is provided with a guide shaft base, the lower end of the guide shaft is fixed in a shaft hole on the guide shaft base, and the outer side of the guide shaft base is provided with a stop dog; the butterfly springs are sleeved on the guide shaft in a pairwise opposite manner, and the guide shaft between the butterfly springs and the guide shaft base is provided with an adjusting gasket group; the valve body supports on the two sides of the valve body are sleeved on the guide shaft at the top of the belleville spring through the through hole.

7. The large scale quick change drive high temperature relief valve according to claim 1 further comprising a drive shaft support structure; the transmission shaft supporting structure comprises 2 groups of supporting seats arranged at two ends of the transmission shaft; two ends of the transmission shaft extend out of two sides of the valve body and are supported by the supporting seat; each group of supporting seats comprises a bearing seat support, a bearing seat and double-row roller bearings, the bearing seat supports are fixed on the valve shell, the bearing seats are fixed on the bearing seat supports, the corresponding ends of the transmission shafts penetrate through shaft holes corresponding to the bearing seats, and the double-row roller bearings are arranged between the transmission shafts and the shaft holes of the bearing seats.

8. The large-scale high-temperature release valve with the quick-replaceable driving device according to claim 1, characterized by further comprising an access observation door; the maintenance observation door consists of a connecting steel plate, a door body, a rotating pin shaft, a sealing pressure plate, a heat insulation layer and a manual screw door lock mechanism; the connecting steel plate is fixedly connected with the valve shell, the door body is rotatably connected with the connecting steel plate through a rotating pin shaft, a sealing pressure plate and a heat insulation layer are arranged on one side of the door body, which faces the valve body, a door hole is correspondingly formed in the valve body, a door edge sealing ring is arranged at the door hole, and the sealing pressure plate is matched with the door edge sealing ring to realize sealing; the maintenance observation door and the valve body are locked and fixed through a manual screw door lock mechanism.

9. The large-scale high-temperature release valve with the quick-replaceable driving device according to claim 1, characterized by further comprising a valve plate position detection device; the valve plate position detection device consists of a rotary encoder, an encoder connecting shaft, a coupler and an encoder bracket; the encoder support is arranged on the outer side of the shaft end of the transmission shaft, the body of the rotary encoder is fixed on the encoder support, the corresponding end of the transmission shaft is coaxially provided with an encoder connecting shaft, and the detection shaft of the rotary encoder is connected with the encoder connecting shaft through a shaft coupling.

10. The large-scale high-temperature release valve with the quick-replaceable driving device according to claim 1, characterized by further comprising a maintenance protection device; the maintenance protection device comprises a safety protection plate and a protection plate fixing frame; the guard plate mount is installed in the valve body that is close to flue gas entry one side, and the safety protection board is a plurality of, hangs the dress side by side and forms interim maintenance platform on the guard plate mount when overhauing.

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