CN109404554B - Wedge-shaped parallel gate valve - Google Patents
Wedge-shaped parallel gate valve Download PDFInfo
- Publication number
- CN109404554B CN109404554B CN201811524766.4A CN201811524766A CN109404554B CN 109404554 B CN109404554 B CN 109404554B CN 201811524766 A CN201811524766 A CN 201811524766A CN 109404554 B CN109404554 B CN 109404554B
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- Prior art keywords
- valve
- valve plate
- wedge
- screw
- wedge block
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Classifications
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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
- F16K3/12—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 with wedge-shaped arrangements of sealing faces
- F16K3/14—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 with wedge-shaped arrangements of sealing faces with special arrangements for separating the sealing faces or for pressing them together
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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
- 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
- F16K3/316—Guiding of the slide
- F16K3/3165—Guiding of the slide with rollers or balls
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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
Abstract
The invention relates to a wedge-shaped parallel gate valve, which comprises a valve body, wherein a fluid channel is axially formed at the lower part of the valve body, a lower wedge block is arranged at the bottom of the fluid channel, an upper wedge block is arranged at the upper part of the fluid channel, and a left valve plate and a right valve plate are arranged at the left side and the right side of the upper wedge block. The valve rod is arranged right above the upper wedge block, the left valve plate and the right valve plate are connected to the lower part of the valve rod, the valve cover is connected to the upper part of the valve body, a cavity is formed, and the valve rod penetrates through the cavity. The connecting block is installed on the upper portion of valve rod, and the lead screw is installed on the upper portion of connecting block, and there is the support screw outside of lead screw, and the support screw is connected in the upper portion of valve gap, and the support end cover is connected in the upper portion of support screw. The invention has the advantages of simple structure, low manufacturing cost, stable and reliable quality, reduced friction of the valve plate, difficult clamping and suitability for medium-low pressure sealing.
Description
Technical Field
The invention relates to a gate valve, in particular to a wedge-shaped parallel gate valve.
Background
In general, the sealing principle of a wedge gate valve is to achieve sealing by tightly combining two sealing surfaces on a wedge gate plate and two sealing surfaces on a valve body when being wedged. The purpose of the wedge gate is to increase the auxiliary sealing load so that a metal-sealed wedge gate valve can seal against both high and low medium pressures. When the valve is closed, the valve rod is rotated clockwise, so that the sealing surface of the gate valve is tightly sealed with the sealing surface of the valve body to achieve sealing. The wedge-shaped parallel gate valve is mainly applied to petroleum and natural gas conveying pipelines, conveying pipelines of finished oil, storage equipment and the like.
The existing wedge-shaped parallel gate valve is in a five-piece structure and is in a wedge-shaped parallel structure, and the scheme cost of the five-piece structure is too high. The prior wedge-shaped rotary parallel valve body is internally provided with a limiting block, the valve plate is required to be close to valve seats at two sides after running downwards, and a process of friction movement at the left and right of the bottom is necessary, so that the abrasion of parts is quickened. The existing wedge-shaped valve plate of the parallel gate valve can generate friction in the use process, so that the loss is quickened. The existing scheme has the defects of complex structure and high cost, friction can be generated at the bottom and two sides of the valve plate, and abrasion of parts is accelerated.
Disclosure of Invention
Aiming at the defects of the prior art, the invention discloses a wedge-shaped parallel gate valve, which aims to solve the problems of complex structure, high cost, friction generated at the bottom and two sides of a valve plate, accelerated abrasion of components and the like in the prior art.
The technical scheme adopted by the invention is as follows:
a wedge-shaped parallel gate valve, characterized in that:
the valve comprises a left valve plate, a valve body, a valve rod, a valve cover, a non-guide bracket screw rod, a lower wedge block, a right valve plate, an upper wedge block, a guide bracket screw rod and a bracket end cover; the fluid passage is formed at the lower portion of the valve body; the lower part of the fluid channel is provided with the lower wedge block; the upper wedge block is arranged at the upper part of the fluid channel; the left valve plate and the right valve plate are respectively arranged on the left side and the right side of the upper wedge block; the upper wedge block is connected to the lower part of the valve rod; the valve body is connected to the lower part of the valve cover, a cavity is formed between the valve body and the valve cover, and the valve rod penetrates through the cavity to be connected to the lower part of the screw rod; the non-guide bracket screw and the guide bracket screw are arranged between the valve cover and the bracket end cover; a through groove is formed in the center of the support end cover, and the screw rod penetrates through the through groove.
The further technical scheme is as follows: the gate valve further comprises a first sealing device and a lower wedge screw; a stepped through groove is formed at the lower part of the fluid channel, the lower wedge block is arranged in the stepped through groove, and the lower wedge block is connected to the upper part of the lower wedge block screw rod; the first sealing device is arranged between the lower wedge block screw and the stepped through groove; the lower part of the lower wedge block screw is fixed on the valve body.
The further technical scheme is as follows: the gate valve further comprises a plug; the lower surface of the valve body is provided with a through hole; and the through hole is plugged with the plug.
The further technical scheme is as follows: the gate valve further comprises a fixed ring and a second set screw; a threaded hole is formed on the outer circle surface of the lower part of the valve rod, and grooves are formed on the upper surface of the left valve plate and the upper surface of the right valve plate; a mounting through hole is formed on the outer surface of the fixed ring; the second set screw penetrates through the mounting through hole and is screwed into the threaded hole; the lower surface of the fixing ring is embedded into the groove.
The further technical scheme is as follows: the gate valve further comprises two groups of valve seats and two groups of guide blocks; grooves are formed on the inner surface of the left valve plate and the inner surface of the right valve plate, and the upper wedge block is arranged between the grooves of the left valve plate and the grooves of the right valve plate; the valve seat is mounted around the fluid passage; when the valve rod is pulled upwards, the upper wedge block is driven to move upwards, the upper surface of the upper wedge block is attached to the upper surface of the groove, the left valve plate and the right valve plate are driven to move upwards, and the fluid channel is opened; when the valve rod is pressed down, the upper wedge block is driven to move downwards, the lower surface of the upper wedge block is attached to the lower surface of the groove, the left valve plate and the right valve plate are driven to move downwards until the outer surface of the left valve plate and the outer surface of the right valve plate are attached to the two groups of valve seats respectively, and the fluid channel is closed; the two groups of guide blocks are respectively arranged on two sides of the left valve plate and the right valve plate.
The further technical scheme is as follows: the gate valve further comprises a fire-resistant hole; the fireproof hole is formed on the outer surface of the left valve plate or/and the right valve plate.
The further technical scheme is as follows: the gate valve further comprises a second sealing device; a first upper surface and a second upper surface are sequentially formed on the upper surface of the valve body along the direction from the outside of the valve body to the inside of the valve body; the first upper surface is higher than the second upper surface; the second sealing device is arranged between the valve cover and the second upper surface; the valve cover is fixedly connected to the first upper surface.
The further technical scheme is as follows: the gate valve further comprises a packing gland, a packing gasket, packing and a packing pressing sleeve; a circular groove is formed in the center of the upper surface of the valve cover; the packing gasket is arranged on the lower surface of the round groove, the packing is arranged on the packing gasket around the valve rod, the packing pressing sleeve is arranged on the packing, and the packing pressing cover covers the packing pressing sleeve; the packing gland is fixed on the valve cover.
The further technical scheme is as follows: the gate valve also comprises a bracket nut and a bracket base; a valve cover step is formed at the upper part of the valve cover; the bracket base is arranged above the valve cover step; the upper outer circular surface of the valve cover is provided with threads, and the bracket nut is screwed into the threads to fix the bracket base.
The further technical scheme is as follows: the gate valve further comprises a connecting block and a rotation stopping key; the upper part of the valve rod is connected with the lower part of the screw rod through the connecting block; a connecting piece is formed on the right side of the connecting block and is embedded into the guide bracket screw rod; a through groove is formed in the center of the support end cover, and the rotation stopping key is installed in the through groove.
The beneficial effects of the invention are as follows:
because the invention seals by combining the wedge acting force and the medium force, the thrust required by the actuating mechanism is rather large at low pressure, and the thrust is rather small at high pressure. The invention is divided into an upper wedge block and a lower wedge block, the three-piece structure is in a wedge-shaped parallel, the cost is lower, and the friction force is small when the two sides of the valve plate are separated under the action of the wedge blocks. Because the lower wedge block is arranged in the valve body, when the valve is closed, the lower wedge surface on the valve plate firstly contacts with the lower wedge block, the valve plate does not move downwards, and the upper wedge block pushes the upper part of the valve plate to press the upper wedge block and the lower wedge block, so that the initial sealing specific pressure is generated, and the sealing effect is achieved. The invention cancels the setting of the limiting block, so that the invention has almost no plane friction of the wedge block or the valve plate. Because the guide blocks are used for guiding the front side and the rear side of the valve plate, the sliding friction is changed into rolling friction, the valve plate is not easy to clamp, and the valve plate is also suitable for horizontal installation. Compared with the prior art, the sealing device has the characteristics of simple structure, low manufacturing cost, stable and reliable quality and suitability for medium-low pressure sealing, and is the biggest product. Simultaneously, the problems that friction is generated at the bottom and two sides of a valve plate and abrasion of parts is accelerated in the prior art are also solved.
Drawings
Fig. 1 is a schematic diagram of the front structure of the present invention.
Fig. 2 is a schematic side view of the present invention.
Fig. 3 is a partial enlarged view at a in fig. 2.
Fig. 4 is a top view of the valve body of the present invention.
Fig. 5 is a partial enlarged view at B in fig. 2.
Fig. 6 is a partial enlarged view at C in fig. 2.
In the figure: 1. a first sealing device; 2. a fluid channel; 3. a fire-resistant hole; 4. a left valve plate; 5. a valve body; 6. a valve stem; 7. a valve cover; 8. a packing gland; 9. a lock nut; 10. a first stud; 11. a non-guide bracket screw; 12. a screw rod; 13. a first set screw; 14. a lower wedge; 15. a right valve plate; 16. an upper wedge; 17. a valve seat; 18. a fixing ring; 19. a second sealing device; 20. a filler liner; 21. a filler; 22. packing pressing sleeve; 23. a connecting block; 24. a guide bracket screw; 25. a bracket end cover; 26. a first nut; 27. a second nut; 28. a second stud; 29. a third gasket; 30. a bolt; 31. a lower wedge screw; 32. a plug; 33. a guide block; 34. a second set screw; 35. a pin; 36. a first upper surface; 37. a second upper surface; 38. a first screw; 39. a first gasket; 40. a second screw; 41. a second gasket; 42. a rotation stopping key; 43. a bracket nut; 44. a bracket base; 45. a third set screw; 46. a valve cover step.
Detailed Description
The following describes a specific implementation of the present embodiment with reference to the drawings.
Fig. 1 is a schematic front view of the present invention, fig. 2 is a schematic side view of the present invention, and fig. 6 is a partially enlarged view of C in fig. 2. As shown in fig. 1, 2 and 6, the present invention discloses a wedge-shaped parallel gate valve, which comprises a valve body 5, a fluid passage 2 is formed at the lower portion of the valve body 5, and the fluid passage 2 is cylindrical. A stepped through groove is formed at a lower portion of the center of the fluid passage 2. The lower wedge 14 is mounted at the center of the stepped through groove, a through hole is formed in the upper surface of the lower wedge 14, and a screw hole is formed in the upper surface of the lower wedge screw 31. The first set screw 13 is threaded through the through hole and then into the threaded hole. Preferably, the first set screw 13 is a hexagon socket set screw. The lower wedge block 14 is fixedly arranged on the lower wedge block screw 31, and the lower surface of the lower wedge block 14 is attached to the upper surface of the lower wedge block screw 31. The first sealing device 1 is formed with an inner circular through hole at a central position thereof. Preferably, the first sealing means 1 is a gasket. The lower surface of the lower wedge screw 31 passes through the inner circular through-hole of the first sealing device 1 to reach the lower portion of the valve body 5. The first nut 26 is screwed into the lower portion of the lower wedge screw 31, and the upper surface of the first nut 26 is fitted to the lower surface of the valve body 5. Preferably, the first nut 26 is a hex nut. The first nut 26 fixedly connects the lower wedge screw 31 to the lower portion of the valve body 5. The joints of the first nut 26, the lower wedge screw 31 and the valve body 5 are welded, so that the connection is more stable. A through hole is formed in the lower surface of the valve body 5 at the side of the first nut 26. The through hole is plugged with a plug 32. The through hole may serve as a drain.
In the center of the fluid channel 2, an upper wedge 16 is mounted at the upper part. The upper wedge 16 is mounted on the lower surface of the valve stem 6, and the upper surface of the upper wedge 16 is attached to the lower surface of the valve stem 6. A screw hole is formed in the outer circumferential surface of the lower portion of the valve stem 6, and an inner circumferential through hole is formed in the center of the fixing ring 18. The lower surface of the upper wedge 16 passes through the inner circular through hole, and a fixing ring 18 is mounted on the lower portion of the valve stem 6. Grooves are formed on the upper surfaces of both the left valve plate 4 and the right valve plate 15, and mounting through holes are formed on the outer surface of the fixing ring 18. The mounting method of the fixing ring 18 on the left valve plate 4 is as follows: the second set screw 34 passes through the mounting through hole and is screwed into the threaded hole. The second set screw 34 fixedly mounts the securing ring 18 to the lower portion of the valve stem 6. The lower surface of the fixing ring 18 is embedded in the groove. The method of mounting the fixing ring 18 on the right valve plate 15 is the same as the method of mounting the fixing ring 18 on the left valve plate 4. Preferably, the second set screw 34 is a hexagon socket set screw.
The left valve plate 4 and the right valve plate 15 are symmetrically arranged on the left side and the right side of the upper wedge block 16. The left valve plate 4 and the right valve plate 15 are both mounted on the lower portion of the valve rod 6, and the fireproof hole 3 is formed on the outer surface of the left valve plate 4 or/and the right valve plate 15. The fire-proof hole 3 is of fire-proof design. The inner surfaces of the left valve plate 4 and the right valve plate 15 are formed with 2 groups of symmetrical grooves, and the upper wedge 16 is embedded into the 2 groups of grooves. When the fluid passage 2 is open, the rear surface of the upper wedge 16 is in abutment with the rear surface of the 2 sets of grooves. A valve seat 17 is mounted around the fluid passage 2 and moves the upper wedge 16 upwardly when the valve stem 6 is pulled upwardly. The upper surface of the upper wedge block 16 is attached to the upper surface of the 2 groups of grooves, so that the left valve plate 4 and the right valve plate 15 are driven to move upwards. The fluid channel 2 is opened. When the valve rod 6 is pressed down, the upper wedge block 16 is driven to move downwards, and the lower surface of the upper wedge block 16 is attached to the lower surface of the 2 groups of grooves. Both the left valve plate 4 and the right valve plate 15 are driven to move downwards. The outer surfaces of the left valve plate 4 and the right valve plate 15 are respectively attached to two sets of valve seats 17. The fluid channel 2 is closed. The left valve plate 4 and the right valve plate 15 can seal the fluid passage 2 better due to the valve seat 17. Fig. 4 is a top view of the valve body 5 of the present invention, in combination with fig. 4. Guide blocks 33 are mounted on both sides of the left valve plate 4 and the right valve plate 15, respectively. Preferably, the guide block 33 is a rolling body. Since the guide block 33 is installed, the movement of the left valve plate 4 and the right valve plate 15 changes the sliding friction into rolling friction. Friction is reduced, and the clamping is not easy to happen.
Fig. 4 is a top view of the valve body of the present invention, and fig. 5 is a partial enlarged view at B in fig. 2. As shown in connection with fig. 4 and 5. The second sealing means 19 is formed at its central position with an inner circular through hole through which the valve stem 6 passes through the second sealing means 19. Preferably, the second sealing means 19 is a gasket. A first upper surface 36 and a second upper surface 37 are formed in this order on the upper surface of the valve body 5 in the direction from the outside of the valve body 5 to the inside of the valve body 5. The first upper surface 36 is higher than the second upper surface 37. The first upper surface 36 and the lower surface of the valve cover 7 are uniformly distributed with threaded through holes and pin holes. The pin 35 is inserted into the pin hole to fix the positions of the valve body 5 and the valve cover 7. The second stud 28 is screwed into the threaded through hole, and the second nut 27 is screwed into the upper portion of the second stud 28. Preferably, the second stud 28 is a stud second nut 27 is a hex nut. The second studs 28 are fixed by a plurality of second nuts 27, so that the connection between the valve body 5 and the valve cover 7 is more stable. The second upper surface 37 is in contact with the lower surface of the second sealing means 19, the upper surface of the second sealing means 19 is in contact with the lower surface of the valve cover 7, and the first upper surface 36 is in contact with the lower surface of the valve cover 7. The upper part of the valve body 5 is connected to the lower part of the valve cover 7, and cavities are formed in the upper part of the valve body 5 and the lower part of the valve cover 7, through which the valve rod 6 passes. Due to the second sealing means 19 a closed cavity is formed.
An inner circular through hole is formed at the upper center of the valve cover 7, and the upper surface of the valve rod 6 passes through the inner circular through hole. The upper surface of the valve cover 7 is provided with a threaded hole at the equidistant position from the center of the circle. A circular groove is formed in the center of the upper surface of the valve cover 7, and the diameter of the circular groove is larger than that of the inner circular through hole. A packing 20 is mounted on the lower surface of the circular groove, a packing 21 is mounted on the packing 20 around the outer circumferential surface of the valve rod 6, a packing sleeve 22 is mounted on the packing 21, and a packing gland 8 covers the packing sleeve 22. The upper surface of the packing gland 8 is provided with a threaded through hole at the equidistant position from the center of the circle. The first stud 10 is rotated through the threaded through hole and then screwed into the threaded hole. The lock nut 9 is screwed into the upper part of the first stud 10. Preferably, the first stud 10 is a stud. The lock nut 9 fixedly connects the packing gland 8 to the packing gland 22. The lower surface of the circular groove is jointed with the lower surface of the packing pad 20, the upper surface of the packing pad 20 is jointed with the lower surface of the packing 21, the upper surface of the packing 21 is jointed with the lower surface of the packing press sleeve 22, and the upper surface of the packing press sleeve 22 is jointed with the lower surface of the packing gland 8.
Fig. 3 is an enlarged view of a portion of fig. 2 at a, as shown in connection with fig. 3. The upper surface of the bracket base 44 is formed with a first threaded through hole at a position equidistant from the center of the circle. A second screw through hole is formed at the center of the bracket nut 43. The upper portion of the valve cap 7 is formed with a valve cap step 46, and the center of the bracket base 44 is formed with an inner circular through hole. The upper surface of the valve cover 7 passes through the inner circular through hole of the bracket base 44. The lower surface of the bracket base 44 engages the stepped surface of the valve cover step 46. The outer circumferential surface of the upper portion of the valve cap 7 is formed with an external thread, the external thread of the upper portion of the valve cap 7 is screwed into the second threaded through hole, and the lower surface of the bracket nut 43 is attached to the upper surface of the bracket base 44. The bracket nut 43 serves to fix the bracket base 44. The third set screw 45 is screwed into the first threaded through hole. The third set screw 45 allows the non-lead bracket screw 11 and the lead bracket screw 24 to be mounted on the bracket base 44. Preferably, the third set screw 45 is a hexagon socket set screw. The lower surfaces of the non-lead screw 11 and the lead screw 24 are in contact with the upper surface of the bracket base 44.
A first mounting hole is formed on the lower surface of the connection block 23, and a second mounting hole is formed on the upper surface of the connection block 23; the upper portion of the valve stem 6 is mounted in the first mounting hole. The lower part of the screw 12 is mounted in the second mounting hole. The upper part of the valve rod 6 is connected to the lower part of the connection block 23, and the lower part of the screw 12 is connected to the upper part of the connection block 23. The outer surface of the connection block 23 is formed with a screw hole, and the center of the first washer 39 is formed with an inner circular through hole. Preferably, the first washer 39 is a spring washer. A first screw 38 is mounted in the threaded bore through a first washer 39. Preferably, the first screw 38 is a socket head cap screw. The first screw 38 applies a clamping force to the connection block 23. A tab is formed on one of the right sides of the connection block 23 near the lead bracket screw 24. A top-down guide groove is formed in one side of the guide bracket screw 24 adjacent to the insert. The inserting piece is embedded into the guide groove and used for maintaining the up-and-down motion track of the screw rod 12 or/and the valve rod 6, so that the situations of deviation, vibration and the like are avoided. The paint is sprayed on the outer surface of the non-guide bracket screw 11, so that the effects of protection and rust prevention are achieved, the guide groove is formed in the guide bracket screw 24, and the paint does not need to be sprayed on the outer surface of the guide bracket screw 24.
Screw holes are formed at the upper surface positions of the non-lead screw 11 and the lead screw 24, respectively. The center positions of the third gasket 29 and the second gasket 41 are respectively formed with an inner circular through hole. Preferably, the third washer 29 and the second washer 41 are both spring washers. The upper surface of the bracket end cover 25 is formed with stepped through holes at positions equidistant from the center of the circle. The bracket end cap 25 has two mounting modes, a first mounting mode, a second screw 40 passes through the stepped through hole and then passes through the inner circular through hole of the second gasket 41, and finally is screwed into the threaded hole. Preferably, the second screw 40 is a socket head cap screw. In the second mounting mode, the bolt 30 passes through the stepped through hole and then passes through the inner circular through hole of the third washer 29, and finally is screwed into the threaded hole. Preferably, the bolts 30 are hex-head bolts. A through groove is formed in the center of the bracket end cover 25, and a rotation stop key 42 is installed in the through groove. The rotation stop key 42 may stop the rotation of the screw 12.
In the open state of the fluid passage 2, the left valve plate 4, the right valve plate 15 and the upper wedge 16 are placed in the cavity between the valve body 5 and the valve cover 7. When the fluid passage 2 is closed, the left valve plate 4, the right valve plate 15, and the upper wedge 16 move downward. The lower surfaces of the left valve plate 4 and the right valve plate 15 are bonded to the upper surface of the lower wedge 14. The left valve plate 4 and the right valve plate 15 do not move downwards any more, and the upper wedge block 16 continues to move downwards to push the left valve plate 4 and the right valve plate 15 to move outwards, so that the outer surfaces of the left valve plate 4 and the right valve plate 15 are attached to the outer surface of the valve seat 17. A closed space is formed. When the fluid passage 2 is reopened, the upper wedge 16 moves upward. The upper surface of the upper wedge block 16 is attached to the upper surfaces of the grooves on the inner surfaces of the left valve plate 4 and the right valve plate 15, so that the left valve plate 4 and the right valve plate 15 are driven to move upwards. The left valve plate 4, the right valve plate 15 and the upper wedge 16 are replaced in the cavity between the valve body 5 and the valve cover 7.
In the present embodiment, the connection between the members described is made by a screw and a washer, by a stud and a nut, and by a set screw, but the present invention is not limited thereto, and other connection methods may be used within a range capable of functioning.
In the present embodiment, the outer surface of the non-lead screw 11 is painted, but the present invention is not limited thereto, and other processing methods within a range capable of functioning are possible.
In the present embodiment, the number of the described components may be a certain number, but not limited to this, and may be other numbers within a range capable of functioning. In this specification, terms such as "cylindrical" are used, and the term "cylindrical" is not intended to be exact, and may be a "substantially cylindrical" state within a range in which the function thereof can be exhibited.
The above description is illustrative of the invention and not limiting, the scope of the invention being defined by the appended claims, which may be modified in any manner without departing from the basic structure of the invention.
Claims (8)
1. A wedge-shaped parallel gate valve, characterized in that: the valve comprises a left valve plate (4), a valve body (5), a valve rod (6), a valve cover (7), a non-guide bracket screw rod (11), a screw rod (12), a lower wedge block (14), a right valve plate (15), an upper wedge block (16), a guide bracket screw rod (24) and a bracket end cover (25); a fluid passage (2) is formed in the lower part of the valve body (5); the lower part of the fluid channel (2) is provided with the lower wedge block (14); the upper part of the fluid channel (2) is provided with the upper wedge block (16); the left valve plate (4) and the right valve plate (15) are respectively arranged on the left side and the right side of the upper wedge block (16); the upper wedge block (16) is connected to the lower part of the valve rod (6); the valve body (5) is connected to the lower part of the valve cover (7), a cavity is formed between the valve body (5) and the valve cover (7), and the valve rod (6) penetrates through the cavity and is connected to the lower part of the screw rod (12); the non-guide bracket screw (11) and the guide bracket screw (24) are arranged between the valve cover (7) and the bracket end cover (25); a through groove is formed in the center of the bracket end cover (25), and the screw rod (12) passes through the through groove;
the gate valve further comprises a first sealing device (1) and a lower wedge screw (31); a stepped through groove is formed at the lower part of the fluid channel (2), the lower wedge block (14) is arranged in the stepped through groove, and the lower wedge block (14) is connected to the upper part of the lower wedge block screw rod (31); the first sealing device (1) is arranged between the lower wedge block screw (31) and the stepped through groove; the lower part of the lower wedge screw (31) is fixed on the valve body (5);
the gate valve further comprises a fixed ring (18) and a second set screw (34); screw holes are formed on the outer circle surface of the lower part of the valve rod (6), and grooves are formed on the upper surface of the left valve plate (4) and the upper surface of the right valve plate (15); a mounting through hole is formed on the outer surface of the fixed ring (18); the second set screw (34) passes through the mounting through hole and is screwed into the threaded hole; the lower surface of the fixing ring (18) is embedded into the groove.
2. The wedge-shaped parallel gate valve of claim 1, wherein: the gate valve further comprises a plug (32); the lower surface of the valve body (5) is provided with a through hole; the through hole is plugged with the plug (32).
3. The wedge-shaped parallel gate valve of claim 1, wherein: the gate valve further comprises two groups of valve seats (17) and two groups of guide blocks (33); grooves are formed on the inner surface of the left valve plate (4) and the inner surface of the right valve plate (15), and the upper wedge block (16) is arranged between the grooves of the left valve plate (4) and the grooves of the right valve plate (15); -said valve seat (17) being mounted around said fluid passage (2); when the valve rod (6) is pulled upwards, the upper wedge block (16) is driven to move upwards, the upper surface of the upper wedge block (16) is attached to the upper surface of the groove, the left valve plate (4) and the right valve plate (15) are driven to move upwards, and the fluid channel (2) is opened; when the valve rod (6) is pressed down, the upper wedge block (16) is driven to move downwards, the lower surface of the upper wedge block (16) is attached to the lower surface of the groove, the left valve plate (4) and the right valve plate (15) are driven to move downwards until the outer surface of the left valve plate (4) and the outer surface of the right valve plate (15) are attached to the two groups of valve seats (17) respectively, and the fluid channel (2) is closed; the two groups of guide blocks (33) are respectively arranged on two sides of the left valve plate (4) and the right valve plate (15).
4. The wedge-shaped parallel gate valve of claim 1, wherein: the gate valve further comprises a fire-proof hole (3); the fireproof hole (3) is formed on the outer surface of the left valve plate (4) or/and the right valve plate (15).
5. The wedge-shaped parallel gate valve of claim 1, wherein: the gate valve further comprises a second sealing means (19); a first upper surface (36) and a second upper surface (37) are sequentially formed on the upper surface of the valve body (5) along the direction from the outside of the valve body (5) to the inside of the valve body (5); -the first upper surface (36) is higher in height than the second upper surface (37); the second sealing means (19) being mounted between the valve cover (7) and the second upper surface (37); the valve cover (7) is fixedly connected to the first upper surface (36).
6. The wedge-shaped parallel gate valve of claim 1, wherein: the gate valve further comprises a packing gland (8), a packing gasket (20), packing (21) and a packing gland bush (22); a circular groove is formed in the center of the upper surface of the valve cover (7); the packing gasket (20) is arranged on the lower surface of the round groove, the packing (21) is arranged on the packing gasket (20) around the valve rod (6), the packing pressing sleeve (22) is arranged on the packing (21), and the packing pressing cover (8) covers the packing pressing sleeve (22); the packing gland (8) is fixed on the valve cover (7).
7. The wedge-shaped parallel gate valve of claim 1, wherein: the gate valve further comprises a bracket nut (43) and a bracket base (44); a valve cover step (46) is formed on the upper part of the valve cover (7); is arranged above the valve cover step (46) on the bracket base (44); the upper outer circular surface of the valve cover (7) is provided with threads, and the bracket nut (43) is screwed into the threads to fix the bracket base (44).
8. The wedge-shaped parallel gate valve of claim 1, wherein: the gate valve further comprises a connecting block (23) and a rotation stopping key (42); the upper part of the valve rod (6) is connected with the lower part of the screw rod (12) through the connecting block (23); a connecting piece is formed on the right side of the connecting piece (23), and is embedded into the guide bracket screw (24); a through groove is formed in the center of the bracket end cover (25), and the rotation stopping key (42) is installed in the through groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811524766.4A CN109404554B (en) | 2018-12-13 | 2018-12-13 | Wedge-shaped parallel gate valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811524766.4A CN109404554B (en) | 2018-12-13 | 2018-12-13 | Wedge-shaped parallel gate valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109404554A CN109404554A (en) | 2019-03-01 |
| CN109404554B true CN109404554B (en) | 2023-08-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811524766.4A Active CN109404554B (en) | 2018-12-13 | 2018-12-13 | Wedge-shaped parallel gate valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109404554B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3349789A (en) * | 1965-05-24 | 1967-10-31 | Gray Tool Co | Lubricated wedge gate valve |
| US4573660A (en) * | 1984-11-23 | 1986-03-04 | Anchor/Darling Valve Company | Double disc gate valve |
| CN1103938A (en) * | 1993-12-19 | 1995-06-21 | 丁前凯 | Gate valve balance device |
| CN201166136Y (en) * | 2008-03-14 | 2008-12-17 | 严胜春 | Temperature adjustment type water sealing parallel type double gate valve |
| CN101915318A (en) * | 2010-08-09 | 2010-12-15 | 上海启会机电科技有限公司 | Wedge block jacking valve |
| CN102094988A (en) * | 2010-12-09 | 2011-06-15 | 无锡市亚迪流体控制技术有限公司 | Parallel gate valve |
| CN202327163U (en) * | 2011-11-28 | 2012-07-11 | 精工阀门有限公司 | Water sealing parallel type double-disc gate valve |
| CN203322328U (en) * | 2013-06-17 | 2013-12-04 | 胡相兰 | Parallel double-gate-disc sluice valve |
| CN105387227A (en) * | 2015-12-03 | 2016-03-09 | 潘健 | Gate valve with module combination type valve body and replaceable sealing rings |
| CN207393992U (en) * | 2017-11-10 | 2018-05-22 | 四川赛尔阀门制造有限公司 | A kind of recovery type double disc expansion sluice valve |
-
2018
- 2018-12-13 CN CN201811524766.4A patent/CN109404554B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3349789A (en) * | 1965-05-24 | 1967-10-31 | Gray Tool Co | Lubricated wedge gate valve |
| US4573660A (en) * | 1984-11-23 | 1986-03-04 | Anchor/Darling Valve Company | Double disc gate valve |
| CN1103938A (en) * | 1993-12-19 | 1995-06-21 | 丁前凯 | Gate valve balance device |
| CN201166136Y (en) * | 2008-03-14 | 2008-12-17 | 严胜春 | Temperature adjustment type water sealing parallel type double gate valve |
| CN101915318A (en) * | 2010-08-09 | 2010-12-15 | 上海启会机电科技有限公司 | Wedge block jacking valve |
| CN102094988A (en) * | 2010-12-09 | 2011-06-15 | 无锡市亚迪流体控制技术有限公司 | Parallel gate valve |
| CN202327163U (en) * | 2011-11-28 | 2012-07-11 | 精工阀门有限公司 | Water sealing parallel type double-disc gate valve |
| CN203322328U (en) * | 2013-06-17 | 2013-12-04 | 胡相兰 | Parallel double-gate-disc sluice valve |
| CN105387227A (en) * | 2015-12-03 | 2016-03-09 | 潘健 | Gate valve with module combination type valve body and replaceable sealing rings |
| CN207393992U (en) * | 2017-11-10 | 2018-05-22 | 四川赛尔阀门制造有限公司 | A kind of recovery type double disc expansion sluice valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109404554A (en) | 2019-03-01 |
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