CN109357031B - Gear-driven novel gate valve - Google Patents
Gear-driven novel gate valve Download PDFInfo
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- CN109357031B CN109357031B CN201811511477.0A CN201811511477A CN109357031B CN 109357031 B CN109357031 B CN 109357031B CN 201811511477 A CN201811511477 A CN 201811511477A CN 109357031 B CN109357031 B CN 109357031B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
- F16K3/0254—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor being operated by particular means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/04—Construction of housing; Use of materials therefor of sliding valves
- F16K27/044—Construction of housing; Use of materials therefor of sliding valves slide valves with flat obturating members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
- F16K3/0281—Guillotine or blade-type valves, e.g. no passage through the valve member
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/28—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with resilient valve members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
- F16K3/314—Forms or constructions of slides; Attachment of the slide to the spindle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/53—Mechanical actuating means with toothed gearing
- F16K31/54—Mechanical actuating means with toothed gearing with pinion and rack
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0008—Mechanical means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0008—Mechanical means
- F16K37/0016—Mechanical means having a graduated scale
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanically-Actuated Valves (AREA)
- Sliding Valves (AREA)
Abstract
The utility model relates to a gate valve, in particular to a novel gate valve for a pipeline in the field of industrial gas flow, powder and granular objects, which is driven by gears. The gate valve adopts various sealing modes, which is beneficial to sealing the valve.
Description
Technical Field
The utility model relates to a gate valve, in particular to a gate valve applied to pipelines in the field of industrial gas flow, powder and granular object transportation.
Background
The gate valve is widely applied in the industrial field, and is mainly applied to opening, intercepting or turning of gas or materials in a pipeline system in the industries of power plants, smelting, cement, chemical industry, grains, mining industry and the like, but has the following defects: the gate valve commonly used in the industry at present has electric drive, manual drive, hydraulic drive and pneumatic drive, the hydraulic drive and pneumatic drive systems are complex, and the application range is limited; the electric and manual driven gate valve is a screw mechanism which is not suitable for frequent opening and closing and high-speed movement of the gate valve, and screw driving of the screw mechanism in an environment with large dust has great disadvantages, is particularly easy to seal and process the phenomenon of locking of a screw rod caused by improper treatment, and has long opening and closing time and difficult maintenance; the gear and rack drive advantage is huge, but can't realize mechanical automatic spacing after the push-pull valve reaches the terminal point, can't carry out mechanical automatic spacing and cause the phenomenon that the motor burns out after the push-pull valve reaches the terminal point when leading to electric drive equipment's automatically controlled device to be out of order, cause very much loss for mill operation, manual equipment opens or closes and also has the problem that hardly judges whether targets in place like what the manual equipment carries out straight reciprocating drive, brings trouble and puzzlement for the operator, can not be fine satisfy production and operation demand, and the sealing means of current push-pull valve also has certain defect.
For this purpose, solutions have been proposed, for example, the problem that the gear is disengaged from the rack and the rack is automatically engaged with the rack rapidly after the gear stops moving is achieved by the utility model patent No. ZL201620587096.0 in chinese patent literature, which discloses a device for disengaging the gear from the rack to the destination gear, but in said document [ 0005 ], the driving rack is formed by connecting the upper connecting block 5 of the rack and the rack portion 8 through the middle notch slideway of the object connecting plate 1 with bolts, the rack slideway and the fixing plate 6 are fixedly connected on the dragging object connecting plate 1 through the lower guide slot of the rack portion 8, and the slideways on both sides of the dragging object connecting plate 1 are arranged in the guide slots on the fixing frame, and the driving rack is connected with the dragging object connecting plate and then drives the dragging object to reciprocate along the fixing frame guide slots. The transmission rack in the arrangement is formed by connecting the upper part connecting block 5 of the rack and the rack part 8 through a notch slideway in the middle of the object connecting plate 1 by bolts, the arrangement of the upper part connecting block 5 has no substantial effect, the arrangement effect can be completely replaced by the arrangement of the rack part 8, excessive manufacturing process of the rack part is caused, and the toughness of the rack is weakened; meanwhile, in the document, the ' middle ' rack slideway and the fixed plate 6 ' and the ' dragging object connecting plate 1 ' are integrally structured through the connection and fixation of the ' middle ' rack slideway and the fixed plate 6 on the dragging object connecting plate 1 in the lower guide groove of the rack part 8, and the arrangement is too simple, so that the technical characteristics of the device cannot be effectively exerted in the manufacturing process of the device; secondly, in the document [ 0006 ], the sliding ways on two sides of the middle notch of the dragging object connecting plate 1 are arranged in the guide grooves at the joint of the connecting block 5 at the upper part of the rack and the rack part 8, and the sliding ways of the sum-shaped rack sliding ways and the fixing plate 6 are arranged in the guide grooves at the lower parts of two sides of the rack part 8; the spring devices 7 and the rack limiting and stopping devices 9 are arranged at the two ends of the front face of the middle notch of the dragging object connecting plate 1, the transmission rack is provided with two slide ways, the two slide ways solve the same problem and belong to the design defect, and particularly the comprehensive arrangement of the dragging object connecting plate 1 with the spring devices 7 and the rack limiting and stopping devices 9 arranged at the two ends of the front face of the middle notch of the dragging object connecting plate 1 becomes a main body fixing structure in technical implementation, and the action of the dragging object connecting plate 1 is excessively set, so that the practical application of the technical principle is limited, and the sealing of the main body structure is inconvenient.
Disclosure of Invention
According to the problems, the novel gear-driven gate valve provided by the utility model changes the phenomenon that the mechanical automatic limit cannot be realized after the valve plate of the existing gate valve reaches the end point, realizes automatic compensation of the gap between the sealing material and the valve plate, and ensures the safe operation of the gate valve to the greatest extent.
In order to solve the technical problems, according to the part principle of the gear and rack reciprocating motion to end point tooth disengagement device disclosed in the utility model patent ZL201620587096.0, the utility model adopts the technical scheme that the novel gear-driven gate valve comprises a valve body, an upper sealing ring, a lower sealing ring, a valve plate, a fixing frame, a sealing device A, a sealing device B, a sealing leakage observation device, a fixing seat, a driving shaft, a gear, a rack, a driving block device, a fixed guide rail, a shell sealing part and a travel indicating device;
the structure of the valve body is a round body or a square body, the upper end and the lower end of the valve body are respectively provided with a connecting flange, wherein an upper sealing ring and a lower sealing ring are arranged at preset positions in the valve body, and the upper sealing ring and the lower sealing ring are made of metal materials or other hard materials; the middle positions of the upper sealing ring and the lower sealing ring are provided with valve plates, the tail ends of the valve plates are connected with a driving block device, and the valve plates do linear reciprocating motion through a fixing frame;
the fixed frames are fixed at preset positions on two sides of the outer part of the valve body, the number of the fixed frames is two, the fixed frames are channel steel, the fixed frames can also be of other structures, two fixed plates are arranged at the other end of the fixed frames and are fixed at the upper end and the lower end of the two fixed frames, and the middle parts of the two fixed plates reserve the normal movement space of the valve plate;
the upper and lower surfaces of the valve plate between the valve body and the two fixing frames are respectively provided with a sealing device A and a sealing device B in sequence, the sealing device A and the sealing device B are respectively provided with an upper group and a lower group, the two groups of sealing devices A are close to the outer side of the valve body, and a sealing leakage observing device is arranged on the sealing device B at the lower part;
the outer part of each fixing frame is provided with a fixing seat, the fixing seats are used for fixing a driving shaft, and two ends of the driving shaft are respectively and fixedly connected with two gears through each fixing seat and the corresponding fixing frame; the gear is meshed with the racks, each rack is arranged in the corresponding driving block device, the driving block devices are two groups and are respectively arranged in the inner spaces of the two fixing frames, the outer sides of the driving block devices are connected with the fixing guide rails, the number of the fixing guide rails is two groups, each group is two, and each fixing guide rail is fixed on the corresponding fixing frame; the outside of each mount all is equipped with the casing sealing part to the casing sealing part is detachable part, wherein sets up travel indication device on the corresponding casing sealing part of a set of mount.
Further, each sealing device A comprises a sealing plate, a compression spring and a sealing cover, the sealing plate seals the valve plate, the compression spring is arranged between the sealing plate and the sealing cover, the compression spring automatically adjusts the sealing gap between the sealing plate and the valve plate, the sealing cover A is fixed on the shell of the fixing frame through a screw, and the sealing plate is made of hard materials or other materials.
Further, each sealing device B comprises a flexible sealing material, a pressing plate, an adjusting spring and a sealing cover A, wherein the flexible sealing material seals the valve plate, the adjusting spring is arranged between the pressing plate and the sealing cover A, the adjusting spring automatically adjusts a sealing gap between the flexible sealing material and the valve plate by pressing the pressing plate, and the sealing cover A is fixed on a shell of the fixing frame by screws.
Further, the seal leakage observation device comprises a flexible pipe and a valve, wherein the upper end of the flexible pipe is fixed on a seal cover A in a sealing device B, and the lower end of the flexible pipe is connected with the valve; the flexible pipe is transparent material, and convenient observation, furthermore, the flexible pipe also can set up to transparent observation window formula structure.
Further, guide grooves are symmetrically formed in two sides of each rack, and spring positioning rods are arranged at two ends of each rack.
Further, each driving block device comprises a fixed block, two springs, two limiting blocks and a dragging object connecting plate, wherein the two limiting blocks are respectively fixed at two ends of the fixed block, spring fixing holes are formed in each limiting block, one ends of the springs are connected in the spring fixing holes on the limiting blocks, the other ends of the springs are correspondingly connected with spring positioning rods of racks, the two limiting blocks are used for fixing the dragging object connecting plate, and meanwhile the dragging object connecting plate is fixedly connected with the tail ends of the valve plates through bolts.
Further, the fixed guide rail is arranged in the guide grooves on two sides of the rack and the limiting block, and the rack drives the driving block device to do linear reciprocating motion along the fixed guide rail through the guide grooves.
Further, the rack is in sliding limiting connection with the driving block device, two ends of the rack are provided with a certain distance from the corresponding limiting blocks, and the gear tooth of the gear passes through the last gear tooth of the rack under the action of force and still normally rotates; since the linear reciprocating motion of the rack is not directly limited by the reaction force of the valve plate, after the rotation of the gear is stopped, the rack is quickly returned to be meshed with the gear under the reaction force of the spring.
Further, guide grooves which are the same as the racks are formed in the two sides of the limiting block, and the guide grooves and the teeth are the same on the same horizontal line.
Further, the travel indicating device comprises a sealing cover B, travel scales and travel indicating needles, wherein the sealing cover B and the travel scales are respectively fixed on the corresponding shell sealing parts of the fixing frame, and the travel indicating needles penetrate through the corresponding shell sealing parts and are fixedly connected with limiting blocks in the corresponding driving block devices.
The utility model can set the number of gears and the same configuration according to actual needs.
Compared with the prior art, the utility model has the following advantages:
1. the gate valve adopts various sealing modes, which is beneficial to sealing the valve.
2. The gate valve adopts a structure of adjusting the sealing gap between the sealing material and the valve plate by adopting the double springs, so that the automatic sealing compensation of the sealing material and the valve plate in the sealing process is realized.
3. The structure of the driving block device in the gate valve realizes that the gear and the rack are automatically disengaged after the gate valve moves to the end point, and simultaneously realizes the purpose of mechanical automatic limiting after the valve plate of the gate valve moves to the end point.
4. The driving block device in the gate valve is simple and practical in structure and convenient to maintain.
5. The driving mode in the gate valve is suitable for frequent opening and closing and high-speed movement of the gate valve, overcomes the defects of a screw mechanism in the driving process, and ensures the safe operation of the gate valve to the maximum extent.
6. The sealing leakage observing device is arranged in the gate valve, so that the object leakage can be observed conveniently, and the sealing material can be replaced in time.
7. The stroke indicating device is arranged in the gate valve, so that an operator can clearly see the stroke state of the valve plate, and the opening and closing degree of the valve plate can be conveniently adjusted.
8. The whole sealing of the shell is completed by the shell sealing part in the gate valve, and dust is effectively prevented from entering the shell.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present utility model;
FIG. 2 is a top view of FIG. 1 in accordance with an embodiment of the present utility model;
FIG. 3 is a cross-sectional view A-A of FIG. 1 in accordance with an embodiment of the present utility model;
FIG. 4 is a B-B cross-sectional view of FIG. 1 in accordance with an embodiment of the present utility model;
FIG. 5 is a cross-sectional view of C-C of FIG. 1 in accordance with an embodiment of the utility model;
FIG. 6 is a cross-sectional view D-D of FIG. 1 in accordance with an embodiment of the present utility model;
FIG. 7 is a cross-sectional E-E view of FIG. 1 in accordance with an embodiment of the utility model;
FIG. 8 is a cross-sectional view F of FIG. 1 in accordance with an embodiment of the present utility model;
the marks in the figure: 1. valve body, 2, upper seal ring, 3, lower seal ring, 4, valve plate, 5, fixing frame, 6, sealing device a, 7, sealing device B, 8, seal leakage observing device, 9, fixing seat, 10, driving shaft, 11, gear, 12, rack, 13, driving block device, 14, fixed guide rail, 15, housing seal part, 16, travel indicating device, 17, seal plate, 18, hold-down spring, 19, seal cover, 20, flexible sealing material, 21, hold-down plate, 22, adjusting spring, 23, seal cover a, 24, fixing plate, 25, flexible tube, 26, valve, 27, guide groove, 28, spring positioning rod, 29, fixing block, 30, spring, 31, stopper, 32, dragging object connecting plate, 33, seal cover B, 34, travel scale, 35, travel indicating needle.
Detailed Description
The following describes embodiments of the present utility model with reference to the accompanying drawings, as shown in fig. 1, 2, 3, 4, 5, 6, 7 and 8: a novel gear-driven gate valve comprises a valve body 1, an upper sealing ring 2, a lower sealing ring 3, a valve plate 4, a fixing frame 5, a sealing device A6, a sealing device B7, a sealing leakage observing device 8, a fixing seat 9, a driving shaft 10, a gear 11, a rack 12, a driving block device 13, a fixed guide rail 14, a shell sealing part 15 and a travel indicating device 16;
the structure of the valve body 1 is a round body or a square body, the upper end and the lower end of the valve body 1 are respectively provided with a connecting flange, wherein an upper sealing ring 2 and a lower sealing ring 3 are arranged at preset positions in the valve body 1, the upper sealing ring 2 and the lower sealing ring 3 are respectively fixed on the valve body 1 shell, and the upper sealing ring 2 and the lower sealing ring 3 are made of metal materials or other hard materials; the middle positions of the upper sealing ring 2 and the lower sealing ring 3 are provided with valve plates 4, the tail ends of the valve plates 4 are connected with a driving block device 13, the valve plates 4 do linear reciprocating motion between the fixing frames 5, and the valve plates 4 intercept and open the valve body 1 through the reciprocating motion;
the fixing frames 5 are fixed at preset positions on two sides of the outer part of the valve body 1, the fixing frames 5 are channel steel, other structures can be arranged, the number of the fixing frames 5 is two, the two fixing frames 5 are symmetrically arranged on the left side and the right side of the valve body 1, two fixing plates 24 are arranged at the other end of the fixing frames 5, the two fixing plates 24 are fixed at the upper end and the lower end of the two fixing frames 5, and the middle part of the two fixing plates 24 is preset with the normal movement space of the valve plate 4.
The upper and lower surfaces of the valve plate 4 between the valve body 1 and the two fixing frames 5 are respectively provided with a sealing device A6 and a sealing device B7 in sequence, the sealing device A6 is close to the outer side of the valve body 1, the sealing devices A6 are respectively provided with an upper group and a lower group, each sealing device comprises a sealing plate 17, a compression spring 18 and a sealing cover 19, the sealing plates 17 are contacted with the valve plate 4, the compression springs 18 are arranged between the sealing plates 17 and the sealing covers 19, and the compression springs 17 automatically adjust the sealing gap between the sealing plates 19 and the valve plate 4; the sealing plate 17 is made of hard material, but can also be made of other materials, and the sealing cover A19 is fixed on the shell of the fixing frame 5 through screws.
The sealing device B7 comprises an upper group and a lower group, each of the upper group and the lower group comprises a flexible sealing material 20, a pressing plate 21, an adjusting spring 22 and a sealing cover A23, the flexible sealing material 20 seals the valve plate 4, the adjusting spring 22 is arranged between the pressing plate 21 and the sealing cover A23, the adjusting spring 22 automatically adjusts the sealing gap between the flexible sealing material 20 and the valve plate 4 by extruding the pressing plate 21, and the sealing cover A23 is fixed on the shell of the fixing frame 5 through screws.
The sealing device B7 positioned at the lower part is provided with a sealing leakage observing device 8, the sealing leakage observing device 8 comprises a flexible pipe 25 and a valve 26, the upper end of the flexible pipe 25 is fixed on a sealing cover A23 in the sealing device B7, and the lower end of the flexible pipe 25 is connected with the valve 26; the flexible pipe 25 is made of transparent material, so that the observation is convenient, and the valve 26 discharges leaked objects; further, the flexible tube may also be provided as a transparent viewing window structure.
The outside of each fixing frame 5 is provided with a fixing seat 9, the fixing seats 9 fix a driving shaft 10, two ends of the driving shaft 10 are respectively and fixedly connected with two gears 11 through each fixing seat 9 and the corresponding fixing frame 5, and the driving shaft 10 is connected with electric (manual) equipment to provide power; the gear 11 is meshed with the racks 12, the racks 12 are two, guide grooves 27 are symmetrically formed in two sides of each rack 12, spring positioning rods 28 are arranged at two ends of each rack 12, each rack 12 is arranged in a corresponding driving block device 13, two groups of driving block devices 13 are respectively arranged in the inner spaces of two fixing frames 5, each driving block device 13 comprises a fixing block 29, two springs 30, two limiting blocks 31 and a dragging object connecting plate 32, the two limiting blocks 31 are respectively fixed at two ends of the fixing block 29, spring fixing holes are formed in each limiting block 31, one end of each spring 30 is connected in each spring fixing hole in each limiting block 31, the other end of each spring 30 is correspondingly connected with the corresponding spring positioning rod 28 of each rack 12, the two limiting blocks 31 are fixedly connected with the dragging object connecting plate 32, and the dragging object connecting plates 32 are fixedly connected with the tail ends of the valve plates 4 through bolts; and both sides of the limiting block 31 are provided with guide grooves 27 identical to the racks 12 and on the same horizontal line with the racks 12.
The outer sides of the driving block devices 13 are connected with fixed guide rails 14, two groups of fixed guide rails 14 are arranged, each group of fixed guide rails 14 is fixed on the corresponding fixing frame 5, each group of fixed guide rails 14 is arranged in guide grooves 27 on two sides of the corresponding racks 12 and limiting blocks 31, and the racks 12 drive the driving block devices 13 and the valve plates 4 to do linear reciprocating motion along the corresponding fixed slide ways 14 through the guide grooves 27.
The two ends of the rack 12 are provided with a certain distance from the corresponding limiting blocks 31, the rack 12 is in sliding limiting connection with the driving block device 13, the rack 12 is in separating fixed connection with the dragging object connecting plate 32, the linear reciprocating motion of the rack 12 is not directly limited by the reaction force of the valve plate 4, so that the gear 11 and the rack 12 are automatically separated from engagement after the end point of the motion of the valve plate 4, and after the rotation of the gear 11 is stopped, the rack 12 is quickly returned to be engaged with the gear 11 under the reaction force of the spring 30, the normal linear reciprocating motion of the valve plate 4 is ensured, and meanwhile, power equipment is not damaged.
The outer sides of the fixing frames 5 are respectively provided with a shell sealing part 15, dust is effectively prevented from entering the shell, the shell sealing parts are detachable components, maintenance and component detection are facilitated, a stroke indicating device 16 is arranged on the corresponding shell sealing part 15 of one group of fixing frames 5, the stroke indicating device 17 comprises a sealing cover B33, a stroke scale 34 and a stroke indicating needle 35, the sealing cover B33 and the stroke scale 34 are respectively fixed on the corresponding shell sealing part 15 of the fixing frames 5, the stroke indicating needle 35 passes through the corresponding shell sealing part 15 and is fixedly connected with the corresponding limiting block 31, and a space for reciprocating movement of the stroke indicating needle 35 is preset at the middle position of the shell of the corresponding shell sealing part 15 of the stroke indicating needle 35; the travel indicating device 16 allows an operator to clearly see the travel state of the movement of the valve plate 4, so as to conveniently adjust the opening and closing degree of the valve plate 4.
The specific working process of the embodiment of the utility model comprises the following steps: the driving shaft 10 of the gate valve is connected with a power device to provide power for the gear 11, the gear 11 pushes the rack 12 meshed with the gear 11 to drive the spring 30 in the driving block device 13 to linearly move along the fixed guide rail 14 under the action of the force, meanwhile, the driving block device 13 drives the valve plate 4 to linearly move in the fixed guide rail 14, when the force is larger than the reaction force of the spring 30, the spring 30 is extruded into a spring fixing hole arranged on the corresponding limiting block 31, at the moment, the rack 13 is contacted with the limiting block 31 and continuously moves, and when the meshing part of the gear 12 and the rack 13 reaches the tail end and the teeth of the gear 12 pass the last tooth of the rack 13, the valve plate 4 also reaches the end; because the two ends of the rack 12 are provided with a certain distance from the corresponding limiting blocks 31, the gear 11 is disengaged when the tooth of the gear 11 passes over the last tooth of the rack 12 under the action of force, but the gear 11 still rotates normally under the action of force.
When the acting force of the gear 11 stops, as the rack 12 is in sliding limit connection with the driving block device 13, the teeth at the tail end in the rack 12 quickly return to the meshing state with the gear 11 under the reaction force of the spring 30, and the purpose that the valve plate 4 of the gate valve does linear reciprocating motion to the end without an electric control device and does not damage electric equipment is achieved.
The last explanation is: the foregoing is merely a specific embodiment of the present utility model, which is merely for illustrating the technical solution of the present utility model, and not for limiting the scope of the present utility model in other forms; although the utility model has been described in detail with reference to the above embodiments, those skilled in the art will appreciate that modifications may be made to the technical solutions described in the above embodiments, or modifications or substitutions may be made to some or all of the technical features thereof; these modifications or substitutions do not depart from the essence of the corresponding technical solutions from the technical solution scope of the present utility model; any equivalent transformation and modification based on the technical scheme of the utility model belong to the protection scope of the technical scheme of the utility model.
Claims (7)
1. The gate valve comprises a valve body, an upper sealing ring, a lower sealing ring, a valve plate, a fixing frame, a sealing device A, a sealing device B, a sealing leakage observing device, a fixing seat, a driving shaft, a gear, a rack, a driving block device, a fixed guide rail, a shell sealing part and a travel indicating device;
the upper end and the lower end of the valve body are respectively provided with a connecting flange, wherein an upper sealing ring and a lower sealing ring are arranged in the valve body; a valve plate is arranged between the upper sealing ring and the lower sealing ring, the tail end of the valve plate is connected with a driving block device, and the valve plate does linear reciprocating motion through a fixing frame;
the two fixing frames are fixed on two sides of the outer part of the valve body, two fixing plates are arranged at the other end of the fixing frames and fixed on the upper end and the lower end of the two fixing frames, and the middle parts of the two fixing plates reserve the movement space of the valve plate;
the upper and lower surfaces of the valve plate between the valve body and the two fixing frames are respectively provided with a sealing device A and a sealing device B in sequence, the sealing device A and the sealing device B are respectively provided with an upper group and a lower group, the two groups of sealing devices A are close to the outer side of the valve body, and a sealing leakage observing device is arranged on the sealing device B at the lower part;
the driving shaft is fixed by the fixed seats, and two ends of the driving shaft are fixedly connected with the two gears through the fixed seats and the corresponding fixed frames respectively; the gear is meshed with the racks, each rack is arranged in the corresponding driving block device, the driving block devices are two groups and are respectively arranged in the inner spaces of the two fixing frames, the outer sides of the driving block devices are connected with the fixing guide rails, the number of the fixing guide rails is two groups, each group is two, and each fixing guide rail is fixed on the corresponding fixing frame; the outer sides of the fixing frames are respectively provided with a shell sealing part, the shell sealing parts are detachably connected with the fixing frames, and a travel indicating device is arranged on the corresponding shell sealing part of one group of fixing frames;
guide grooves are symmetrically formed in two sides of each rack, and spring positioning rods are arranged at two ends of each rack;
each driving block device comprises a fixed block, two springs, two limiting blocks and a dragging object connecting plate, wherein the two limiting blocks are respectively fixed at two ends of the fixed block, spring fixing holes are formed in each limiting block, one end of a spring is connected in each spring fixing hole on each limiting block, the other end of the spring is correspondingly connected with a spring positioning rod of a rack, the two limiting blocks are fixedly dragging object connecting plates, and the dragging object connecting plates are fixedly connected with the tail ends of valve plates through bolts;
the rack is in sliding limit connection with the driving block device, two ends of the rack are provided with a certain distance from the corresponding limiting blocks, and the gear tooth of the gear passes through the last gear tooth of the rack under the action of force and still normally rotates; since the linear reciprocating motion of the rack is not directly limited by the reaction force of the valve plate, after the rotation of the gear is stopped, the rack is quickly returned to be meshed with the gear under the reaction force of the spring.
2. The gear driven gate valve of claim 1, wherein: each sealing device A comprises a sealing plate, a compression spring and a sealing cover, wherein the sealing plate seals the valve plate, the compression spring is arranged between the sealing plate and the sealing cover, the compression spring automatically adjusts the sealing gap between the sealing plate and the valve plate, and the sealing cover A is fixed on the shell of the fixing frame through screws.
3. The gear driven gate valve of claim 1, wherein: each sealing device B comprises a flexible sealing material, a pressing plate, an adjusting spring and a sealing cover A, wherein the flexible sealing material seals the valve plate, the adjusting spring is arranged between the pressing plate and the sealing cover A, the adjusting spring automatically adjusts a sealing gap between the flexible sealing material and the valve plate by extruding the pressing plate, and the sealing cover A is fixed on a shell of the fixing frame through a screw.
4. A gear driven gate valve according to claim 1 or 3, wherein: the seal leakage observation device comprises a flexible pipe and a valve, wherein the upper end of the flexible pipe is fixed on a seal cover A in a seal device B, and the lower end of the flexible pipe is connected with the valve; the flexible tube is a transparent material.
5. The gear driven gate valve of claim 1, wherein: the fixed guide rail is arranged in the guide grooves on two sides of the rack and the limiting block, and the rack drives the driving block device to do linear reciprocating motion along the fixed guide rail through the guide grooves.
6. The gear driven gate valve of claim 1, wherein: the two sides of the limiting block are provided with guide grooves which are the same as the racks and are the same as the racks on the same horizontal line.
7. The gear driven gate valve of claim 1, wherein: the stroke indicating device comprises a sealing cover B, a stroke scale and a stroke indicating needle, wherein the sealing cover B and the stroke scale are respectively fixed on a corresponding shell sealing part of the fixing frame, and the stroke indicating needle penetrates through the corresponding shell sealing part and is fixedly connected with a limiting block in the corresponding driving block device.
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| CN201811511477.0A CN109357031B (en) | 2018-12-11 | 2018-12-11 | Gear-driven novel gate valve |
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| CN201811511477.0A CN109357031B (en) | 2018-12-11 | 2018-12-11 | Gear-driven novel gate valve |
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| CN109357031B true CN109357031B (en) | 2023-08-29 |
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| CN111252397A (en) * | 2020-03-23 | 2020-06-09 | 大连碧海环保设备有限公司 | Powder strong shut-off valve and stock bin |
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|---|---|
| CN109357031A (en) | 2019-02-19 |
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