CN114110191B

CN114110191B - Novel blind plate device with shifting rotating shaft

Info

Publication number: CN114110191B
Application number: CN202111271861.XA
Authority: CN
Inventors: 张萍; 郭清云; 高杨; 刘磊; 刘屹; 卢江波; 闫祁; 黄振海
Original assignee: Beijing Aerospace Petrochemical Technology and Equipment Engineering Corp Ltd
Current assignee: Beijing Aerospace Petrochemical Technology and Equipment Engineering Corp Ltd
Priority date: 2021-10-29
Filing date: 2021-10-29
Publication date: 2023-05-09
Anticipated expiration: 2041-10-29
Also published as: CN114110191A

Abstract

The invention provides a novel blind plate device with a shifting rotating shaft, which comprises a left valve body, a right valve body, a sliding plate with a double-sealing fireproof structure, an eccentric connecting rod actuating mechanism for controlling the sliding plate to loosen or clamp, a driving mechanism and a lifting mechanism for vertically drawing the sliding plate, wherein the sliding plate is positioned between the left valve body and the right valve body, the eccentric connecting rod actuating mechanism loosens or clamps the sliding plate under the action of the driving mechanism, and the lifting mechanism is used for driving the sliding plate to move up and down. The invention utilizes the eccentric connecting rod structure of the displacement type of the rotating shaft, realizes that the two working states of the through and the blind of the pipeline can be easily and quickly switched by only one person to operate the rotating shaft to rotate the rotating shaft without using other lifting equipment or auxiliary tools for dismounting and mounting the blind plate, and not only can the high sealing performance of the normal working state be met, but also the sealing reliability under the working condition of extreme fire can be met; in addition, the horizontal installation space can be saved to the greatest extent, and the blind plate is drawn smoothly and easily.

Description

Novel blind plate device with shifting rotating shaft

Technical Field

The invention belongs to the technical field of pipeline communication and cutting-off, and particularly relates to a novel blind plate device with a movable rotating shaft, which is arranged in the middle of a pipeline (not at the end of the pipeline), can realize quick separation or communication of the pipeline, is simple and quick in product use, convenient to maintain and capable of achieving the same sealing effect of an 8-shaped blind plate, and is particularly suitable for occasions needing frequent switching of the blind plates and high in sealing requirement, such as oil refining, chemical industry, offshore oil and gas exploitation, boundary region separation of equipment in industries such as long-distance pipeline and the like, material separation, periodic maintenance, frequent switching and the like, and the like.

Background

The traditional 8-shaped blind plate is usually switched by loosening bolts for connecting the blind plate and the pipeline, separating the flanges by adopting a forced method, and manually inserting the blind plate between the flanges so as to realize the isolation of the pipeline, thereby having high labor intensity and long operation time. For some discontinuous production process devices, if the blind plates need to be periodically switched, the workload is large, and the normal operation time of the device is influenced by excessively long time for switching the blind plates, so that the economic benefit is influenced.

Therefore, it is necessary to provide a blind plate device to realize the fast switching between the conducting state and the blind sealing state of the pipeline, reduce the environmental pollution caused by the leakage of the medium, improve the production efficiency and increase the production benefit.

Disclosure of Invention

The invention aims to design a blind plate rapid switching device which is suitable for the working condition of frequently switching blind plates and can realize rapid switching of pipeline conduction and blind sealing states and high-performance sealing. According to the invention, through designing the rotating shaft shifting type eccentric connecting rod structure, the two working states of the pipeline, namely the through working state and the blind working state, can be easily and rapidly switched by only one person to operate the rotating shaft to rotate the rotating shaft without using other lifting equipment or auxiliary tools for dismounting the blind plate, and the invention can not only meet the requirements of high sealing performance in the normal working state, but also meet the sealing reliability in the extreme fire working condition. In addition, the horizontal installation space can be saved to the greatest extent, and the blind plate is drawn smoothly and easily.

Specifically, the technical scheme provided by the invention is as follows:

a novel blind plate device with a shifting rotating shaft comprises a left valve body, a right valve body, a sliding plate with a double-sealing fireproof structure, an eccentric connecting rod executing mechanism for controlling the sliding plate to loosen or clamp, a driving mechanism and a lifting mechanism for vertically pulling the sliding plate;

the outer ends of the left valve body and the right valve body are pipeline flanges which are connected with flanges of the butted system pipelines, the inner ends of the left valve body and the right valve body are flange structures with sealing surfaces, and when the blind plate device is clamped, the inner side flanges and the double sealing rings of the sliding plate form a sealing pair;

the eccentric link actuator comprises a press block assembly, a first main driving shaft, a second main driving shaft, a first auxiliary driving shaft, a second auxiliary driving shaft, an eccentric shaft link, a crank and a crank link; the pressing block assembly comprises two longitudinal left pressing blocks and two longitudinal right pressing blocks, the left pressing blocks and the right pressing blocks are respectively pressed from two sides of the valve body and are connected with inner side flanges of the left valve body and the right valve body, the two left pressing blocks are connected in series through a first main driving shaft and a second main driving shaft which are distributed up and down, the two right pressing blocks are connected in series through a first auxiliary driving shaft and a second auxiliary driving shaft which are distributed up and down, the first main driving shaft and the second main driving shaft are eccentric rod pieces, and the first auxiliary driving shaft and the second auxiliary driving shaft are concentric rod pieces; the two ends of the first main driving shaft and the first auxiliary driving shaft, and the two ends of the second main driving shaft and the second auxiliary driving shaft are respectively connected in series by two parallel eccentric connecting rods; one end of the first main driving shaft is connected with the driving mechanism, the other end of the first main driving shaft is connected with the second main driving shaft through a crank connecting rod, two ends of the crank connecting rod are fixed on a crank, and the crank is sleeved on the main driving shaft at the outer side of the eccentric connecting rod;

the sliding plate with the double-sealing fireproof structure is positioned between the left valve body and the right valve body and comprises a blind plate, an inner sealing ring and an outer sealing ring, one half of the blind plate is provided with a hole to form a through hole, the other half of the blind plate is a solid plate, the hole end is used for communicating a pipeline, and the solid plate is used for isolating the pipeline; double sealing grooves are formed in the two sides of the blind plate open end and the solid plate, the double sealing grooves are concentric with the blind plate through holes, the inner sealing ring and the outer sealing ring are embedded in the concentric double sealing grooves, and sealing between the sliding plate and the left valve body and sealing between the sliding plate and the right valve body are implemented;

the driving mechanism is used for driving the first main driving shaft to rotate so as to drive the second main driving shaft to rotate, eccentric rotation of the first main driving shaft and the second main driving shaft is utilized to generate eccentric distance, so that the front-back symmetrical eccentric connecting rod pulls the right valve body to shift, the sliding plate is pushed to move, and loosening or clamping of the left valve body and the right valve body to the sliding plate is implemented;

the lifting mechanism of the vertical drawing sliding plate is used for driving the sliding plate to move up and down and converting the blind state.

Further, the first main driving shaft comprises a middle thick section, a thin section I and a thin section II which are positioned at one side of the middle thick section, a thin section III, a thin section IV and a thin section V which are positioned at the other side of the middle thick section, the middle thick section is not concentric with the thin sections II-V at two ends and is concentric with the thin section I, and two left pressing blocks are sleeved on the middle thick section of the first main driving shaft; an eccentric connecting rod is arranged on a thin section III of the first main driving shaft, a crank is arranged on a thin section IV, and the thin section V is used as a spare part; and the thin section II is sequentially provided with an eccentric connecting rod thin nut and a cotter pin, and the thin section I is connected with a driving mechanism. The second main drive shaft has only few segments I connected to the drive mechanism relative to the first main drive shaft.

Further, the first auxiliary driving shaft and the second auxiliary driving shaft are of symmetrical concentric structures, and comprise a middle thick section and thin sections at two sides, wherein a right pressing block is sleeved on the middle thick section, and the thin sections at two sides are an eccentric connecting rod, a thin nut and a cotter pin in sequence from inside to outside.

Further, the lifting limiting plate and the bottom limiting plate are arranged at two ends of the sliding plate, and when limiting, the front edges of the lifting limiting plate and the bottom limiting plate can contact the inner side flange of the valve body facing the lifting limiting plate and the bottom limiting plate, so that the through hole or the blind end is centered with the pipeline and is positioned at the working position when the sliding plate moves upwards or downwards.

Further, the driving mechanism is a reduction gearbox with a driving hand wheel, and a torque output port of the reduction gearbox is connected with the thin section I of the first main driving shaft to provide driving force for the first main driving shaft.

Further, the lifting mechanism comprises a lifting frame, a valve rod nut, a valve rod, a rolling bearing, a bearing gland and a fork pin; the lifting frame is arranged on an inner side flange of the valve body opposite to the lifting limiting plate and the bottom limiting plate and comprises a longitudinal bracket and a top bracket for supporting the whole lifting mechanism; a shoulder is arranged on the valve rod nut, rolling bearings are arranged on two sides of the shoulder, and the bearing gland compresses the rolling bearings to compress the valve rod nut on a top support of the blind plate lifting frame, so that the valve rod nut does not move axially; an internal thread is processed in the valve rod nut and is matched with the valve rod thread with the trapezoid external thread, and the valve rod is driven to move up and down by rotation; the lower end of the valve rod is connected with the sliding plate through a fork pin, and the valve rod drives the sliding plate to move upwards or downwards together. The upper section of the valve rod nut is sleeved with a lifting hand wheel and locked by a locking nut to drive the valve rod nut to rotate.

Further, the vertical support of hoisting frame has vertical space, installs the pilot lever of slide in the vertical space, and the pilot lever is together fixed with fork round pin, along with fork round pin and slide reciprocates, indicates the position of slide. The vertical support of the lifting frame is marked with a switch position, the switch position refers to the limit position of the right valve body reaching the loosening slide plate, and the switch position refers to the limit position of the right valve body reaching the clamping slide plate.

Further, at least two valve body guide posts distributed on two sides of the sliding plate are arranged between the left valve body and the right valve body, one end of each valve body guide post is fixedly connected with the left valve body or the right valve body through threads, and the other end of each valve body guide post is connected with an optical hole of the right valve body or the left valve body through an optical axis to play a guiding role.

Further, two rows of slide guide posts are respectively arranged on the inner side flanges of the left valve body and the right valve body, the slide guide posts are uniformly distributed according to the movement direction of the slide plate, one end of each slide guide post is a threaded section, a pressing block and the valve body are tightly pressed by screwing in the corresponding valve body, the other end of each slide guide post is a nut, and the slide plate is driven to move along with the right valve body when the slide plate is clamped or loosened.

The novel blind plate device with the rotary shaft shifted has the following beneficial effects:

(1) The novel blind plate device with the shifting rotating shaft has ingenious overall structural design, and compared with valve products, the blind plate device has no internal leakage and is completely isolated; compared with other quick-switching blind plate-like devices, the device has no internal hidden gasket, only has a visible gasket on the sliding plate, reduces the possibility of external leakage, and is environment-friendly and safe; the gasket is not hidden inside, and the gasket is convenient to replace in actual operation; the pipeline is only required to be opened by 3-5mm in the whole switching process, and only small pipeline stress is born, so that time and labor are saved compared with the traditional blind plate;

(2) In order to realize the rapid switching function of the blind plate device, the invention designs a set of simple and reliable eccentric connecting rod actuating mechanism for shifting the rotating shaft, which shifts a clamping mechanism (a left valve body or a right valve body) on one side of the blind plate through the rotation of the rotating shaft, controls the loosening or clamping of a sliding plate, only needs to operate a hand wheel to enable the loosening or clamping of the sliding plate, realizes the reduction of the blind plate switching operation time to the thirty-one or even less degree of the switching time of the 8-word blind plate, and does not depend on the operation experience of other hoisting tools or workers;

(3) The invention provides a novel blind plate device with a movable rotating shaft, which adopts a sliding plate with a double-sealing fireproof structure, wherein double sealing is adopted between the sliding plate and a left valve body and between the sliding plate and a right valve body, sealing and isolation of media are realized by an inner sealing ring, sealing and fire retarding are realized by an outer ring, and the high sealing requirement of a process pipeline when the blind plate is switched is met;

(4) The novel blind plate device with the shifting rotating shaft provided by the invention has the advantages that the guide mechanism of the blind plate device is designed to effectively solve the problem, so that the sliding plate of the blind plate device is shifted and not deviated in the blind state, and the pulling is smooth and not blocked;

(5) According to the novel blind plate device with the shifting rotating shaft, provided by the invention, the situation that the horizontal direction of the horizontal pipeline layout is quite compact in actual installation is considered, the space of the horizontal drawing blind plate is limited, the vertical drawing blind plate is adopted, a reliable vertical lifting slide plate mechanism is designed, the slide plate can be switched upwards or downwards by rotating a hand wheel to drive the lifting mechanism on the slide plate, the horizontal space is saved to a great extent, time and labor are saved, and unsafe factors which are easy to generate when the blind plate with the vertical drawing blind plate falls down are also solved.

Drawings

FIG. 1 is a schematic diagram of a front view of a blind apparatus;

FIG. 2 is a schematic side view of a blind apparatus;

FIG. 3 is a schematic top view of a blind apparatus;

FIG. 4 is a schematic view of a first primary drive shaft;

FIG. 5 is a schematic view of a dual seal fire seal sled;

fig. 6 is a schematic view of a sled lift mechanism.

Description of the reference numerals

1-a left valve body; 2-right valve body; 3-a slide plate guide post; 4-a first main drive shaft; 401-fine section I; 402-fine section II; 403-middle coarse section; 404-fine section III; 405-segment IV; 406-thin section V; 5-a second main drive shaft; 6-a first secondary drive shaft; 7-a second auxiliary drive shaft; 8-eccentric shaft connecting rods; 9-a pin shaft with pins; 10-crank; 11-crank connecting rod; 121-left pressing block; 122-right briquetting; 13-a drive mechanism; 14-a valve body guide post; 15-a skateboard; 16-eccentric link actuators; 17-a lifting mechanism; 18-a reduction gearbox; 19-threaded connection I; 20-a bracket; 21-threaded connection II; 22-cotter pin; 23-thin nuts; 24-an outer sealing ring; 25-an inner sealing ring; 26-lifting a limiting plate; 27-a bottom limiting plate; 28-threaded connection IV; 29-a valve stem; 30-lifting a hand wheel; 31-locking nut; 32-rolling bearings; 33-bearing gland; 34-forking pins; 35-lifting frame; 36-threaded connection III; 37-nut; 38-bolts; 39-a valve stem nut; 40-indicating rod.

Detailed Description

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

The word "exemplary" is used 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. Although various aspects of the embodiments are illustrated in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

The invention provides a novel blind plate device with a shifting rotating shaft, which is shown in figures 1, 2 and 3 and comprises a left valve body 1, a right valve body 2, a sliding plate 15 with a double-sealing fireproof structure, an eccentric connecting rod actuating mechanism 16 for controlling the loosening or clamping of the sliding plate, a driving mechanism 13, a sliding plate guiding mechanism and a lifting mechanism 17 for vertically drawing the sliding plate;

in the invention, the left valve body 1 and the right valve body 2 are basically consistent in appearance, the outer end is a pipeline flange which is connected with a flange of a butt joint system pipeline, the inner end is a flange structure with a sealing surface, and when the blind plate device is clamped, the inner flange and the double sealing rings of the sliding plate 15 form a sealing pair.

In the present invention, the eccentric link actuator 16 comprises a press block assembly, a first main drive shaft 4, a second main drive shaft 5, a first auxiliary drive shaft 6, a second auxiliary drive shaft 7, an eccentric shaft link 8, a crank 10 and a crank link 11; the press block assembly comprises two longitudinal left press blocks 121 and two longitudinal right press blocks 122, wherein the left press blocks 121 and the right press blocks 122 respectively press from two sides of the valve body and are connected with inner side flanges of the left valve body 1 and the right valve body 2, the two left press blocks 121 are strung together through a first main driving shaft 4 and a second main driving shaft 5 which are distributed up and down, the two right press blocks 122 are strung together through a first auxiliary driving shaft 6 and a second auxiliary driving shaft 7 which are distributed up and down, the first main driving shaft 4 and the second main driving shaft 5 are eccentric rods, and the first auxiliary driving shaft 6 and the second auxiliary driving shaft 7 are concentric rods; the two ends of the first main driving shaft 4 and the first auxiliary driving shaft 6, the two ends of the second main driving shaft 5 and the second auxiliary driving shaft 7 are respectively strung together by two parallel eccentric connecting rods 8; one end of the first main driving shaft 4 is connected with a driving mechanism 13, the other end of the first main driving shaft is connected with the second main driving shaft 5 through a crank connecting rod 11, two ends of the crank connecting rod 11 are fixed on a crank 10 through a pin shaft 9 with a pin, and the crank 10 is sleeved on the main driving shaft outside the eccentric connecting rod 8. Both ends of the two main drive shafts and the two auxiliary drive shafts are limited by cotter pins 22.

Preferably, as shown in fig. 4, the first main driving shaft 4 comprises a middle coarse section 403, a fine section I401 and a fine section II 402 which are positioned on one side of the middle coarse section 403, a fine section III404, a fine section IV 405 and a fine section V406 which are positioned on the other side of the middle coarse section 403, wherein the middle coarse section 403 is concentric with the fine sections II-V (402, 404, 405, 406) on two ends and is concentric with the fine section I401, and two left pressing blocks 121 are sleeved on the middle coarse section 403 of the first main driving shaft 4; an eccentric connecting rod 8 is arranged on a thin section III404 of the first main driving shaft 4, a crank 10 is arranged on a thin section IV 405, and a thin section V406 is used as a spare part; the eccentric connecting rod 8, the thin nut 23 and the cotter pin 22 are sequentially arranged on the thin section II 402, and the thin section I401 is connected with the driving mechanism 13. The second main drive shaft 5 is identical with respect to the first main drive shaft 4 with only a few thin segments I401 connected to the drive mechanism 13.

The first auxiliary driving shaft 6 is of a symmetrical concentric structure and comprises a middle thick section and thin sections at two sides, the right pressing block 122 is sleeved on the middle thick section, the thin sections at two sides are sequentially provided with the eccentric connecting rod 8, the thin nut 23 and the cotter pin 22 from inside to outside, and parts mounted on the second auxiliary driving shaft 7 are consistent with the parts mounted on the second auxiliary driving shaft.

When external force is applied to enable one end of the first main driving shaft 4 to rotate clockwise, the first main driving shaft 4 drives the second main driving shaft 5 to rotate together through a crank 10 and a crank connecting rod 11 which are connected together and a crank 10 connected with the other end of the crank connecting rod, eccentric rotation of the first main driving shaft 4 and the second main driving shaft 5 is utilized to generate eccentric distance, four eccentric connecting rods 8 which are symmetrical front and back are used for pulling a right valve body to shift leftwards, the distance between the left valve body and the right valve body is continuously reduced, a pushing sliding plate 15 is also moved leftwards, and further the left valve body and the right valve body clamp the sliding plate 15, so that the sealing effect is achieved. In general, the axial distance is changed by simultaneously rotating two eccentric shafts (the first main driving shaft 4 and the second main driving shaft 5) and two concentric shafts (the first auxiliary driving shaft 6 and the second auxiliary driving shaft 7) in the eccentric connecting rod actuating mechanism 16, so that the requirement of four-point clamping sealing sliding plates of the left valve body and the right valve body is realized. Similarly, the first main driving shaft 4 is rotated anticlockwise by rotating the driving mechanism 13 in the loosening process, so that the right valve body combined mechanism of the 4 eccentric shaft connecting rods 8 in the eccentric connecting rod actuating mechanism 16 is shifted rightwards, and the left valve body and the right valve body are further loosened to the slide plate 15, so that the effect of easily drawing the slide plate 15 is achieved.

In the invention, as shown in fig. 5, a sliding plate 15 with a double-sealing fireproof structure is positioned between a left valve body 1 and a right valve body 2 and comprises a blind plate, an inner sealing ring 25 and an outer sealing ring 24; the blind plate is the same as the 8-shaped blind plate, half of the blind plates are provided with holes to form through holes, half of the blind plates are solid plates, the open ends are used for communicating pipelines, and the solid plates are used for isolating the pipelines. The blind plate rapid switching device has two working states of a through state and a blind state, and in the through state, the through holes of the blind plate are aligned and sealed with the pipeline, and at the moment, the device is in a sealed state relative to the outside, and a medium is sealed in the pipeline; and when the blind state is achieved, the solid plates of the blind plates are aligned and sealed with the pipelines, the device is in a sealed state relative to the outside, and the medium is blocked in the pipelines at the two sides by the blind plates. The blind plate switching comprises the following steps: and switching from the blind end to the through end and switching from the through end to the blind end. In the blind state switching process, the device is in a non-sealing state relative to the outside, and the pipeline is communicated with the outside.

The blind plate open end and the two sides of the solid plate are respectively provided with a double-seal groove, the double-seal grooves are concentric with the blind plate through holes, the inner sealing ring 25 and the outer sealing ring 24 are embedded in the concentric double-seal grooves, the upstream and downstream of a pipeline is effectively isolated during blind sealing, the risk of external air leakage is avoided, and high-performance sealing between the sliding plate 15 and the left valve body 1 and the right valve body 2 is realized. Preferably, the inner seal ring is typically a rubber O-ring or a plastic gasket, and the outer seal ring is typically a graphite ring or a graphite wound gasket. The inner and outer seal rings (25, 24) may also be other types of seals such as wound gaskets, sealing blocks, semi-metallic gaskets, etc. During normal operation, the driving mechanism 13 drives the right valve body 2 to clamp the inner sealing ring and the outer sealing ring at the sliding plate 15, so that the sealing of the device is realized, and the device is in a sealing state. When the blind plate state needs to be switched, the driving mechanism 13 is operated to drive the right valve body 2 to loosen the sliding plate 15 and form gaps on two sides of the sliding plate 15. Before the working position of the slide plate 15 is switched, the integrity of the inner and outer sealing rings can be directly checked, and the replacement can be carried out without cutting off the pipeline or removing the structure on the device.

Preferably, the two ends of the sliding plate 15 are provided with a lifting limiting plate 26 and a bottom limiting plate 27, when limiting, the front edges of the lifting limiting plate 26 and the bottom limiting plate 27 can contact the inner flange of the valve body facing the lifting limiting plate 26 and the bottom limiting plate 27 (if the two limiting plates face the left valve body, the front edges of the limiting plates can contact the inner flange of the left valve body), so as to ensure that the through hole or the blind end is centered with the pipeline and positioned at the working position when the sliding plate moves upwards or downwards, ensure that the sealing positions of each time are the same, and realize the sealing stability. Further, the lifting limiter plate 26 comprises a transverse limiter plate and a longitudinal connecting plate, both of which are fixed to the blind plate by means of threaded connectors IV 28, such as screws.

In the present invention, the slide guide mechanism is realized by the design of the slide guide post 3 and the valve body guide post 14. At least two valve body guide posts 14 distributed on two sides of the sliding plate are arranged between the left valve body (1) and the right valve body (2), one end of each valve body guide post 14 is fixedly connected with the left valve body (1) or the right valve body (2) through threads, and the other end of each valve body guide post is connected with an optical axis of the right valve body (2) or an optical hole of the left valve body (1) to play a guiding role, so that the right valve body (2) and the sliding plate do not deviate along the left-right movement of the axial direction of the pipeline.

Two rows of slide plate guide posts 3 are respectively arranged on the inner side flanges of the left valve body 1 and the right valve body 2 and are uniformly distributed according to the movement direction of the slide plate 15, so that the slide plate 15 is smooth and free from jamming when moving up and down; one end of the slide plate guide post 3 is a thread section, and the screw is screwed into the corresponding valve body to compress the pressing block 12 and the valve body, and the other end of the slide plate guide post 3 is a nut such as a hexagonal nut, so that the nut can drive the slide plate 15 to move along with the right valve body 2 when the slide plate 15 is clamped or loosened. Through the design of the axial height of the slide guide post nut, a certain amount of clearance is also ensured between the slide 15 and the left and right valve bodies (1, 2) in the loosening state, and abrasion between the sealing ring on the slide and the left and right valve bodies (1, 2) in real time is prevented when the slide 15 is pulled.

In the invention, as shown in fig. 6, a lifting mechanism 17 of a vertical pulling slide plate comprises a lifting frame 35, a valve rod nut 39, a valve rod 29, a lifting hand wheel 30, a locking nut 31, a rolling bearing 32, a bearing gland 33 and a fork pin 34; the lifting frame 35 is arranged on an inner flange of the valve body opposite to the lifting limiting plate 26 and the bottom limiting plate 27, and comprises a longitudinal bracket and a top bracket for supporting the whole lifting mechanism 17; a shoulder is arranged on the valve rod nut 39, rolling bearings 32 are arranged on two sides of the shoulder, and a bearing gland 33 compresses the rolling bearings 32 to compress the valve rod nut 39 on a top bracket of the blind plate lifting frame 35, so that the valve rod nut 39 can only rotate without axial movement; the upper section of the valve rod nut 39 is sleeved with a lifting hand wheel 30 and locked by a locking nut 31 for driving the valve rod nut 39 to rotate; an internal thread is processed in the valve rod nut 39 and is in threaded fit with the valve rod 29 with the trapezoid external thread, and the valve rod 29 is driven to move up and down by rotation; the lower end of the valve rod 29 is connected with the lifting limiting plate 26 through a fork pin 34, the lower end of the valve rod 29 is fixed with the fork pin 34 through screws, the lifting limiting plate 26 is connected with the fork pin 34 through a bolt 38 and a nut 37, and therefore the valve rod 29 drives the slide lifting plate 26 and the slide 15 to move upwards or downwards together. The design of the lifting mechanism not only can save manpower to lift the sliding plate, but also can save horizontal installation space, and also provides an alternative scheme for field installation.

Preferably, the vertical support of the lifting frame 35 has a vertical gap, the vertical gap is provided with an indication rod 40 of the sliding plate, the indication rod 40 is fixed with the fork pin 34 by a screw, and can move up and down along with the fork pin 34 and the sliding plate 15, so that the position of the sliding plate 15 can be accurately indicated, the through and blind positions of the sliding plate 15 can be accurately indicated, and the on-site operation is more visual and convenient.

Preferably, the longitudinal support of the lifting frame 35 is marked with a switch position, the open position means that the right valve body 2 reaches the limit position of the loosening slide 15, and the closed position means that the right valve body 2 reaches the limit position of the clamping slide 15. When the indication rod 40 corresponds to the open position, the sliding plate 15 is released, and enough gaps are reserved on the two sides, so that the blind plate switching operation can be completed; when the indication lever 40 is at the corresponding closing position, the right valve body 2 is indicated to clamp the slide plate 15, and the sealing state is achieved.

In the invention, the driving mechanism 13 is a reduction gearbox 18 with a driving hand wheel, and a torque output port of the reduction gearbox 18 is connected with a thin section I401 of the first main driving shaft 4 to provide driving force for the first main driving shaft 4. In addition to a manually operated drive hand wheel, the reduction gearbox 18 may be driven in other ways: such as pneumatic, hydraulic, electric, etc., can be controlled realistically and automatically.

When in field installation, the blind plate device is arranged in the middle of a pipeline, and the left valve body 1 and the right valve body 2 of the blind plate device are respectively connected with a pipeline flange. If the normal working condition is assumed to be on, namely the left valve body 1 and the right valve body 2 clamp the position of the through hole of the sliding plate 15, the smoothness of the pipeline is realized. When the working condition is switched from the 'on' state to the 'blind' state, the driving mechanism 13 is operated to drive the eccentric link actuating mechanism 16 to realize the loosening of the slide plate 15, the lifting mechanism 17 of the vertical pulling slide plate is used for pulling the slide plate 15, the position of the through hole on the slide plate 15 is moved to the blind sealing position, and finally the driving hand wheel 13 is reversely rotated to drive the eccentric link actuating mechanism 16 to realize the clamping of the slide plate 15. The specific operation process is as follows:

1 operation of the blind apparatus from the clamped state to the unclamped state by the slide 15:

the driving hand wheel 13 is operated anticlockwise, and enough torque is provided by the reduction gearbox 18 with the driving hand wheel 13 as an actuating mechanism. First, the safety lock of the blind plate device is opened, the driving hand wheel 13 is operated anticlockwise, and enough torque is provided by the reduction gearbox 18 with the driving hand wheel as an actuating mechanism. The reduction gearbox 18 is locked on the bracket 20 through a threaded connecting piece I19 such as a screw, and the bracket 20 and the left pressing block 121 are fixed through a threaded connecting piece II 21 such as a screw. The torque output port of the reduction gearbox 18 is connected with a thin section I401 of the first main driving shaft 4, the thin section I401 is concentric with a middle thick section 403 of the first main driving shaft 4, a crank 10, an eccentric connecting rod 8 and a pressing block 12 are sequentially arranged from a thin section IV 405 thin section III to the middle thick section 403 of the first main driving shaft 4, and a thin section V406 is free; a press block 12, an eccentric link 8, a thin nut 23, a cotter pin 22 and a driving mechanism 13 are installed in this order from the middle thick section 403, the thin section II 402 to the thin section I401. The second main drive shaft 5 is identical in size and mounting parts and order to the first main drive shaft 4, except that it is not connected to the reduction gearbox 18 and therefore has a small number of output ends connected to the output of the reduction gearbox 18. The first auxiliary drive shaft 6 is provided with a right press block 122, an eccentric connecting rod 8, a thin nut 23 and a cotter pin 22 in this order from the middle thick section to the two thin sections on the two sides, and the parts mounted on the second auxiliary drive shaft 7 are consistent with the parts. The first main drive shaft 4 is connected to the second main drive shaft 5 by means of two cranks 10 and a crank connecting rod 11. The two ends of the crank connecting rod 11 are fixed with the crank 10 through a pin shaft 9 with pins. The first main driving shaft 4 rotates anticlockwise, drives the whole eccentric connecting rod actuating mechanism 16 to push the right valve body 2 to the right together, drives the slide plate guide post 3 to pull the slide plate 15 to shift rightwards, and reaches the loosening state of the slide plate 15 at the moment until the hand wheel rotates to the open position.

2 switch the skateboard from the ON state to the blind state

The lifting hand wheel 30 is rotated anticlockwise, the hand wheel drives the valve cover nut 39 to rotate, and the valve rod nut 39 is pressed on the blind plate lifting support 35 by the rolling bearing 32, the bearing gland 33 and the screw, the valve cover nut 39 can only rotate, the valve rod 29 with trapezoidal threads is driven by the valve cover nut 39 to move up and down, the lower end of the valve rod 29 is connected with the lifting limiting plate 26 through the fork pin 34, the lower end of the valve rod 29 is fixed with the fork pin 34 through a threaded connecting piece III36 such as a screw, and the longitudinal connecting plate of the lifting limiting plate 26 is connected with the fork pin 34 through the bolt 38 and the nut 37, so that the valve rod 29 drives the sliding plate lifting plate 26 and the sliding plate 15 to move down together. The indicator bar 40 on the blind lift bracket 35 can move downwardly with the fork pin 34 and slide plate 15 to precisely indicate the position of the slide plate 15 until the indicator bar 40 moves downwardly to a designated "blind seal" position, stopping rotation of the lift hand wheel 30.

3 operation of the blind assembly from the released state of the slide 15 to the clamped state:

the driving hand wheel is operated clockwise, the first driving shaft 4 is driven to rotate clockwise through the reduction gearbox 18, the whole eccentric connecting rod actuating mechanism 16 is driven to move the right valve body 2 leftwards together, the slide plate guide post 3 is driven to pull the slide plate 15 to move leftwards, and the clamping state of the slide plate 15 is achieved until the hand wheel rotates to the 'off' position.

The state switching of the blind plate device from the blind state to the on state is basically consistent with the above, and will not be repeated.

The operation process in the invention is realized by manually operating the driving hand wheel and the lifting hand wheel 30, and other driving modes can be adopted: such as pneumatic, hydraulic, electric, etc., can be controlled realistically and automatically.

The invention has been described in detail in connection with the specific embodiments and exemplary examples thereof, but such description is not to be construed as limiting the invention. It will be understood by those skilled in the art 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, and these fall within the scope of the present invention. The scope of the invention is defined by the appended claims.

What is not described in detail in the present specification is a well known technology to those skilled in the art.

Claims

1. The novel blind plate device with the shifting rotating shaft is characterized by comprising a left valve body (1), a right valve body (2), a sliding plate (15) with a double-sealing fireproof structure, an eccentric connecting rod actuating mechanism (16) for controlling the loosening or clamping of the sliding plate, a driving mechanism (13) and a lifting mechanism (17) for vertically pulling the sliding plate;

the outer ends of the left valve body (1) and the right valve body (2) are pipeline flanges, the pipeline flanges are connected with flanges of the butted system pipelines, the inner ends of the left valve body and the right valve body are flange structures with sealing surfaces, and when the blind plate device is clamped, the inner side flanges and double sealing rings of the sliding plate (15) form a sealing pair;

the eccentric link actuating mechanism (16) comprises a pressing block assembly, a first main driving shaft (4), a second main driving shaft (5), a first auxiliary driving shaft (6), a second auxiliary driving shaft (7), an eccentric link (8), a crank (10) and a crank link (11); the pressing block assembly comprises two longitudinal left pressing blocks (121) and two longitudinal right pressing blocks (122), the left pressing blocks (121) and the right pressing blocks (122) are respectively pressed from two sides of the valve body and are connected with inner side flanges of the left valve body (1) and the right valve body (2), the two left pressing blocks (121) are connected with each other in series through a first main driving shaft (4) and a second main driving shaft (5) which are distributed up and down, the two right pressing blocks (122) are connected with each other in series through a first auxiliary driving shaft (6) and a second auxiliary driving shaft (7) which are distributed up and down, the first main driving shaft (4) and the second main driving shaft (5) are eccentric bars, and the first auxiliary driving shaft (6) and the second auxiliary driving shaft (7) are concentric bars; the two ends of the first main driving shaft (4) and the first auxiliary driving shaft (6), and the two ends of the second main driving shaft (5) and the second auxiliary driving shaft (7) are respectively connected in series by two parallel eccentric connecting rods (8); one end of the first main driving shaft (4) is connected with a driving mechanism (13), the other end of the first main driving shaft is connected with the second main driving shaft (5) through a crank connecting rod (11), two ends of the crank connecting rod (11) are fixed on a crank (10), and the crank (10) is sleeved on the main driving shaft outside the eccentric connecting rod (8);

the sliding plate (15) with the double-sealing fireproof structure is positioned between the left valve body (1) and the right valve body (2) and comprises a blind plate, an inner sealing ring (25) and an outer sealing ring (24), one half of the blind plate is provided with a hole to form a through hole, the other half of the blind plate is a solid plate, the hole end is used for communicating a pipeline, and the solid plate is used for isolating the pipeline; double-sealing grooves are formed in the two sides of the blind plate open end and the solid plate, the double-sealing grooves are concentric with the blind plate through holes, an inner sealing ring (25) and an outer sealing ring (24) are embedded in the concentric double-sealing grooves, and sealing between the sliding plate (15) and the left valve body (1) and sealing between the sliding plate and the right valve body (2) are implemented;

the driving mechanism (13) is used for driving the first main driving shaft (4) to rotate so as to drive the second main driving shaft (5) to rotate, eccentric distances are generated by using eccentric rotation of the first main driving shaft (4) and the second main driving shaft (5), so that the front-back symmetrical eccentric connecting rod (8) pulls the right valve body to shift, the sliding plate (15) is pushed to move, and loosening or clamping of the sliding plate by the left valve body and the right valve body is implemented;

the lifting mechanism (17) of the vertical drawing slide plate is used for driving the slide plate (15) to move up and down so as to realize the conversion between the open state and the blind state.

2. The novel blind plate device with the shift type rotating shaft according to claim 1, wherein the first main driving shaft (4) comprises a middle thick section (403), a thin section I (401) and a thin section II (402) which are positioned on one side of the middle thick section (403), a thin section III (404), a thin section IV (405) and a thin section V (406) which are positioned on the other side of the middle thick section (403), the middle thick section (403) is not concentric with the thin sections II-V at two ends and is concentric with the thin section I (401), and two left pressing blocks (121) are sleeved on the middle thick section (403) of the first main driving shaft (4); an eccentric connecting rod (8) is arranged on a thin section III (404) of the first main driving shaft (4), a crank (10) is arranged on a thin section IV (405), and a thin section V (406) is used as a spare section; an eccentric connecting rod (8), a thin nut (23) and a cotter pin (22) are sequentially arranged on the thin section II (402), and the thin section I (401) is connected with a driving mechanism (13).

3. A new blind apparatus with shifted spindle according to claim 2, characterized in that the second main drive shaft (5) has only few thin segments I (401) connected to the drive mechanism (13) with respect to the first main drive shaft (4).

4. The novel blind plate device with the shift type rotating shaft according to claim 1, wherein the first auxiliary driving shaft (6) and the second auxiliary driving shaft (7) are of symmetrical concentric structures and comprise a middle thick section and thin sections at two sides, a right pressing block (122) is sleeved on the middle thick section, and the thin sections at two sides are respectively provided with a thin nut (23) of an eccentric connecting rod (8) and a cotter pin (22) from inside to outside.

5. The novel blind plate device with the displacement type rotating shaft according to claim 1, wherein lifting limiting plates (26) and bottom limiting plates (27) are arranged at two ends of the sliding plate (15), and when limiting, the front edges of the lifting limiting plates (26) and the bottom limiting plates (27) can contact with the inner flange of the valve body facing the lifting limiting plates, so that the through holes or blind ends are aligned with the pipeline and are positioned at working positions when the sliding plate moves upwards or downwards.

6. The novel blind plate device with the displacement type rotating shaft according to claim 1, wherein the driving mechanism (13) is a reduction gearbox (18) with a driving hand wheel, and a torque output port of the reduction gearbox (18) is connected with a thin section I (401) of the first main driving shaft (4) to provide driving force for the first main driving shaft (4).

7. The novel blind plate device with the displacement of the rotating shaft according to claim 5, wherein the lifting mechanism (17) comprises a lifting frame (35), a valve rod nut (39), a valve rod (29), a rolling bearing (32), a bearing gland (33) and a fork pin (34); the lifting frame (35) is arranged on an inner side flange of the valve body opposite to the lifting limiting plate (26) and the bottom limiting plate (27), and comprises a longitudinal bracket and a top bracket for supporting the whole lifting mechanism (17); a shoulder is arranged on the valve rod nut (39), rolling bearings (32) are arranged on two sides of the shoulder, and a bearing gland (33) presses the rolling bearings (32) to press the valve rod nut (39) on a top support of the blind plate lifting frame (35) so that the valve rod nut (39) does not move axially; an internal thread is processed in the valve rod nut (39) and is matched with the thread of the valve rod (29) with the trapezoid external thread, and the valve rod (29) is driven to move up and down by rotation; the lower end of the valve rod (29) is connected with the sliding plate (15) through a fork pin (34), and the valve rod (29) drives the sliding plate (15) to move upwards or downwards together.

8. The novel blind plate device with the shift type rotating shaft according to claim 7, wherein the upper section of the valve rod nut (39) is sleeved with a lifting hand wheel (30) and locked by a locking nut (31) for driving the valve rod nut (39) to rotate.

9. The novel blind plate device with the displacement type rotating shaft according to claim 7, wherein the longitudinal support of the lifting frame (35) is provided with a longitudinal gap, an indication rod (40) of the sliding plate is arranged in the longitudinal gap, the indication rod (40) is fixed with the fork pin (34), and the position of the sliding plate (15) is indicated along with the up-and-down movement of the fork pin (34) and the sliding plate (15).

10. The novel blind plate device with the displacement type rotating shaft according to claim 9, wherein a switch position is marked on a longitudinal bracket of the lifting frame (35), the open position refers to the limit position of the right valve body (2) reaching the loosening slide plate (15), and the closed position refers to the limit position of the right valve body (2) reaching the clamping slide plate (15).

11. The novel blind plate device with the shift type rotating shaft according to claim 1, wherein at least two valve body guide posts (14) distributed on two sides of the sliding plate are arranged between the left valve body (1) and the right valve body (2), one end of each valve body guide post (14) is fixedly connected with the left valve body (1) or the right valve body (2) through threads, and the other end of each valve body guide post is connected with an optical axis and an optical hole of the right valve body (2) or the left valve body (1) to play a guiding role.

12. The novel blind plate device with the shift type rotating shaft according to claim 1, wherein two rows of slide plate guide posts (3) are respectively arranged on the inner side flanges of the left valve body (1) and the right valve body (2), the slide plate guide posts are uniformly distributed according to the moving direction of the slide plate (15), one end of each slide plate guide post (3) is a threaded section, a pressing block is screwed into the corresponding valve body to press the valve body, the other end of each slide plate guide post (3) is a nut, and the slide plate (15) is driven to move along with the right valve body (2) when the slide plate (15) is clamped or loosened.