CN112377625A

CN112377625A - Differential pressure regulating stop valve

Info

Publication number: CN112377625A
Application number: CN202011149645.3A
Authority: CN
Inventors: 罗仕勋
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-10-23
Filing date: 2020-10-23
Publication date: 2021-02-19

Abstract

The invention discloses a differential pressure regulating stop valve, which comprises a stop valve body, wherein a valve cavity is fixedly arranged inside the stop valve body, a first connecting flange is fixedly arranged on one side of the stop valve body, a second connecting flange is fixedly arranged on the other side of the stop valve body, a first waterproof seat is fixedly arranged at the top end of the stop valve body, two sides of the top end of the first waterproof seat are respectively and alternately connected with a second waterproof seat through threaded columns, the surfaces of the two threaded columns are respectively and spirally connected with a fastening nut, and a first threaded seat is fixedly arranged in the middle of the top end of the second waterproof seat. Effectively reducing the maintenance times and the maintenance and replacement cost.

Description

Differential pressure regulating stop valve

Technical Field

The invention relates to a stop valve, in particular to a differential pressure regulating stop valve, and belongs to the technical field of stop valves.

Background

The stop valve is also called stop valve, belonging to forced sealing type valve, so when the valve is closed, it must apply pressure to valve clack to force sealing surface not to leak, when the medium is fed into the valve from below the valve clack, the resistance force which must be overcome by operation force is the friction force of valve stem and packing material and the thrust force produced by pressure of medium, the force for closing the valve is greater than the force for opening the valve, so the diameter of valve stem is greater, otherwise the failure of stem top bending can occur. The connection mode is divided into three types: flange connection, screw thread connection and welding connection. After the self-sealing valve appears, the medium flow direction of the stop valve enters the valve cavity from the upper part of the valve clack, at the moment, the force for closing the valve is small under the action of medium pressure, the force for opening the valve is large, the diameter of the valve rod can be correspondingly reduced, and meanwhile, the valve in the form is tighter under the action of the medium.

Chinese patent No. CN109488774A proposes a large-flow stop valve and stop valve control method, both can realize the power of stop valve and open and close, thereby reduce working strength, can reduce the requirement for the drive energy of power supply by showing again, thereby be convenient for realize that power opens and closes through a kind of simple portable power source of battery, however, present stop valve still has some weak points, the stop valve is in the in-process that uses, even because do not open and close the step for a long time, lead to the complete rust-death of drive arrangement, can't ensure the normal use of screw rod, when need using to the needs, need spend more time maintenance, present stop valve does not have filtering capability simultaneously, lead to in the in-process that uses, the quality of water influences the life of stop valve, for this reason, we provide a pressure differential regulation stop valve.

Disclosure of Invention

The present invention is directed to a differential pressure regulating shutoff valve to solve the problems set forth in the background art.

In order to achieve the purpose, the invention provides the following technical scheme: a pressure difference adjusting stop valve comprises a stop valve body, wherein a valve cavity is fixedly arranged inside the stop valve body, a first connecting flange is fixedly arranged on one side of the stop valve body, a second connecting flange is fixedly arranged on the other side of the stop valve body, a first waterproof seat is fixedly arranged at the top end of the stop valve body, a transmission screw rod is connected with the first waterproof inner thread, one end of the transmission screw rod extends into the valve cavity and is fixedly connected with a valve clack, a sealing seat is fixedly arranged at a through hole of the valve cavity and is movably connected with the valve clack in a matched mode, an adjusting hand wheel is fixedly connected with the other end of the transmission screw rod, a protective cover is arranged at the top end of the second waterproof seat, a second thread seat is fixedly arranged at the top end of the protective cover and is in threaded through connection with the transmission screw rod, a slag discharge hole is fixedly arranged in the middle of the, the utility model discloses a slag discharging port's surface department threaded connection has sealed lid, the middle part of sealed lid inner chamber rotates and is connected with the connecting rod, the one end transition fit of connecting rod is connected with first filter screen and second filter screen, first filter screen and second filter screen are Y shape and distribute, just the one end of first filter screen and the one end of second filter screen all with seal receptacle swing joint.

As a preferred technical scheme of the invention, an oil storage cylinder is fixedly arranged on one side of an inner cavity of the protective cover, a hemispherical plug is movably connected inside the oil storage cylinder in a matching manner, a piston rod is fixedly arranged at one end of the hemispherical plug, an oil guide pipe is fixedly arranged at the top end of the oil storage cylinder, one end of the oil guide pipe is fixedly connected with a bifurcated pipe, and two branch pipes of the bifurcated pipe are respectively communicated with a second threaded seat and a first threaded seat.

As a preferable technical scheme of the invention, one end of the piston rod penetrates through the protective cover and is fixedly provided with the pressing cap.

As a preferable technical scheme of the invention, the through hole at one end of the second connecting flange and the through hole at one end of the first connecting flange are both fixedly provided with extension pipes, and the surfaces of the two extension pipes are both fixedly provided with thread waterproof rings.

As a preferable technical solution of the present invention, a compression spring is fixedly provided between the second screw base and the first screw base.

As a preferable technical scheme of the invention, two symmetrical lug plates are fixedly arranged at the bottom of the protective cover, and the middle parts of the two lug plates are movably connected with the second waterproof seat through fastening screws in threaded connection.

As a preferable technical scheme of the invention, the bottom end of the valve body of the stop valve is fixedly provided with a wear-resistant support leg, and the bottom end of the wear-resistant support leg is fixedly provided with a stable support.

As a preferable technical scheme of the invention, an O-shaped ring is fixedly arranged at the joint of the slag discharge port and the sealing cover.

As a preferred technical scheme of the invention, an anti-corrosion sleeve is sleeved on the outer side of the transmission screw rod between the valve clack and the second waterproof seat.

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

1. according to the pressure difference adjusting stop valve, the first filter screen, the second filter screen and the connecting rod are arranged, and the first filter screen and the second filter screen are distributed in a Y shape, so that impurities in fluid inside the valve cavity can be filtered conveniently and effectively, the harm of the impurities to the valve body of the stop valve is reduced, and the service life of the stop valve is prolonged.

2. According to the pressure difference adjusting stop valve, the sealing cover and the slag discharging opening are arranged, the first filter screen and the second filter screen are movably connected and are in transition fit connection with the connecting rod, disassembly and cleaning are convenient, the filtering performance of the first filter screen and the filtering performance of the second filter screen are guaranteed, and the pressure difference adjusting stop valve is high in practicability.

3. According to the pressure difference adjusting stop valve, the semi-spherical plug, the piston rod, the pressing cap, the oil guide pipe, the oil storage cylinder and the branch pipe are arranged, so that lubricating oil in the oil storage cylinder can be conveniently added to the first threaded seat and the second threaded seat, the lubricating effect of a transmission screw is improved, friction is reduced, corrosion is avoided, long-term normal use of the valve in a severe environment is realized, and the maintenance frequency and the maintenance cost are effectively reduced.

4. According to the pressure difference adjusting stop valve, the protective cover, the lug plate, the fastening screw and the anti-corrosion sleeve are arranged, so that a good protective effect can be achieved, and the transmission screw is prevented from being corroded by wind and rain and fluid to be corroded and damaged, so that the normal use of the stop valve is influenced.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the valve body of the stop valve of the present invention;

FIG. 3 is a schematic view of the internal structure of the valve body of the shut-off valve of FIG. 1 according to the present invention;

FIG. 4 is a schematic view of the internal structure of the FIG. 1 shut-off valve body of the present invention;

FIG. 5 is an enlarged view of a portion of FIG. 1;

FIG. 6 is an enlarged view of a portion of FIG. 3 at B in accordance with the present invention;

FIG. 7 is an enlarged view of a portion of the invention shown at C in FIG. 3.

In the figure: 1. a stop valve body; 2. an extension tube; 3. a thread waterproof ring; 4. a first connecting flange; 5. a second connecting flange; 6. a first waterproof seat; 7. a second waterproof seat; 8. adjusting a hand wheel; 9. a valve cavity; 10. a threaded post; 11. fastening a nut; 12. a protective cover; 13. a first threaded seat; 14. a compression spring; 15. a second threaded seat; 16. a drive screw; 17. a bifurcated tube; 18. a sealing seat; 19. a valve flap; 20. an anti-corrosion sleeve; 21. a wear resistant foot; 22. stabilizing the support; 23. a first filter screen; 24. a second filter screen; 25. a sealing cover; 26. a slag discharge port; 27. an O-shaped ring; 28. a connecting rod; 29. a hemispherical plug; 30. a piston rod; 31. pressing the cap; 32. an oil guide pipe; 33. an oil storage cylinder; 34. an ear plate; 35. and (5) fastening the screw.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-7, the present invention provides a technical solution of a differential pressure regulating stop valve:

according to the drawings 1-7, the check valve comprises a check valve body 1, a valve cavity 9 is fixedly arranged inside the check valve body 1, a first connecting flange 4 is fixedly arranged on one side of the check valve body 1, a second connecting flange 5 is fixedly arranged on the other side of the check valve body 1, a first waterproof seat 6 is fixedly arranged on the top end of the check valve body 1, two sides of the top end of the first waterproof seat 6 are respectively and alternately connected with a first end extending into the valve cavity 9 and a valve clack 19 through a threaded column 10, a sealing seat 18 is fixedly arranged at the opening of the valve cavity 9, the sealing seat 18 is movably connected with the valve clack 19 in a matching manner, an adjusting hand wheel 8 is fixedly connected with the other end of a transmission screw 16, a protective cover 12 is arranged on the top end of the second waterproof seat 7, a second threaded seat 15 is fixedly arranged on the top end of the protective cover 12, the second threaded seat 15 is in threaded through connection with the transmission screw 16, the threaded connection of the surface department of row's cinder notch 26 has sealed lid 25, and the middle part of sealed lid 25 inner chamber rotates and is connected with connecting rod 28, and the one end transition fit of connecting rod 28 is connected with first filter screen 23 and second filter screen 24, and first filter screen 23 and second filter screen 24 are Y-shaped and distribute, and the one end of first filter screen 23 and the one end of second filter screen 24 all with seal receptacle 18 swing joint.

According to the drawings of fig. 1, 3 and 7, an oil storage cylinder 33 is fixedly arranged on one side of the inner cavity of the protective cover 12, a hemispherical plug 29 is movably connected inside the oil storage cylinder 33 in a matched mode, a piston rod 30 is fixedly arranged at one end of the hemispherical plug 29, an oil guide pipe 32 is fixedly arranged at the top end of the oil storage cylinder 33, a bifurcated pipe 17 is fixedly connected to one end of the oil guide pipe 32, two branch pipes of the bifurcated pipe 17 are respectively communicated with a second threaded seat 15 and a first threaded seat 13, one end of the piston rod 30 penetrates through the protective cover 12 and is fixedly provided with a pressing cap 31, so that lubricating oil inside the oil storage cylinder 33 can be conveniently added to the first threaded seat 13 and the second threaded seat 15, the lubricating effect of the transmission screw 16 is improved, friction is reduced.

According to fig. 1, fig. 3 and fig. 5 show, the through-hole department of 5 one ends of second flange and the through-hole department of 4 one ends of first flange all fix and are equipped with extension pipe 2, the equal fixed waterproof circle of screw thread 3 that is equipped with in surface of two extension pipes 2, improve the sealing nature of being connected between stop valve and the pipeline, therefore, the clothes hanger is strong in practicability, it is equipped with compression spring 14 to fix between second screw thread seat 15 and the first screw thread seat 13, the fixed otic placode 34 that is equipped with two symmetries of bottom department of protection casing 12, the middle part of two otic placodes 34 all is through the fastening screw 35 and the waterproof seat 7 swing joint of second that threaded connection has, convenient to dismantle the inside lubricating oil of changing oil.

According to fig. 1 and 3, the bottom end of the stop valve body 1 is fixedly provided with a wear-resistant support leg 21, the bottom end of the wear-resistant support leg 21 is fixedly provided with a stable support 22, the stability is improved, an O-shaped ring 27 is fixedly arranged at the joint of a slag discharge port 26 and a sealing cover 25, the sealing performance of the slag discharge port 26 is improved, an anti-corrosion sleeve 20 is sleeved on the outer side of a transmission screw 16 between the valve clack 19 and the second waterproof seat 7, the protection performance of the transmission screw 16 inside the valve cavity 9 is improved, and the corrosion damage caused by fluid is avoided.

The thread waterproof ring 3 is made of ethylene propylene rubber and is formed by combining a plurality of rings.

When the pressure difference adjusting stop valve is used specifically, a first connecting flange 4 and a second connecting flange 5 are respectively connected to a pipeline in a flange mode, extension pipes 2 are fixedly arranged at a through hole at one end of the second connecting flange 5 and a through hole at one end of the first connecting flange 4, threaded waterproof rings 3 are fixedly arranged on the surfaces of the two extension pipes 2, and the connection sealing performance between the stop valve and the pipeline is improved;

in the using process, the fluid enters the inside of the valve cavity 9 through the first connecting flange 4, firstly passes through a Y-shaped structure formed by one end of the first filter screen 23 and the second filter screen 24 to filter impurities, the adjusting hand wheel 8 is rotated to enable the transmission screw 16 to correspondingly rotate, the valve clack 19 leaves the seal seat 18 to enable the fluid to pass through the seal seat 18, when the cut-off is needed, the adjusting hand wheel 8 is reversely rotated, the valve clack 19 is tightly fit with the seal seat 18 to prevent the fluid from passing through, secondly, a hemispherical plug 29, a piston rod 30, a pressing cap 31, an oil guide pipe 32, an oil storage cylinder 33 and a bifurcated pipe 17 are arranged, the lubricating oil in the oil storage cylinder 33 is conveniently added to the first threaded seat 13 and the second threaded seat 15, the lubricating effect of the transmission screw 16 is improved, the friction is reduced, the occurrence of corrosion is avoided, the long-term normal use of the valve in a severe environment is realized, the maintenance times and the maintenance, through the protection casing 12 that is equipped with, otic placode 34, fastening screw 35 and anticorrosion cover 20, can play good guard action, prevent that drive screw 16 from suffering the erosion of wind and rain and fluid matter and taking place the corrosion damage, influence the normal use of stop valve, the maintenance of being convenient for simultaneously, through the sealed lid 25 and the row cinder notch 26 that are equipped with, and swing joint between first filter screen 23 and the second filter screen 24, and be connected with connecting rod 28 transition fit, the convenient dismantlement is washd, guarantee first filter screen 23 and second filter screen 24's filtering quality, therefore, the clothes hanger is strong in practicability.

The first filter screen 23 and the second filter screen 24 are made of brass filter screens and a layer of filter cotton is attached to the brass filter screens.

In the description of the present invention, it is to be understood that the indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings and are only for convenience in describing the present invention and simplifying the description, but are not intended to indicate or imply that the indicated devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention.

In the present invention, unless otherwise explicitly specified or limited, for example, it may be fixedly attached, detachably attached, or integrated; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a pressure difference adjusting stop valve, includes stop valve body (1), its characterized in that, the fixed valve pocket (9) that is equipped with in inside of stop valve body (1), one side of stop valve body (1) is fixed and is equipped with first flange (4), the fixed second flange (5) that is equipped with of opposite side of stop valve body (1), the fixed first waterproof seat (6) that is equipped with in top of stop valve body (1), the inside threaded connection that the both sides on first waterproof seat (6) top all worn through screw thread post (10) that are equipped with has drive screw (16), the one end of drive screw (16) extends to the inside of valve pocket (9) and fixedly connected with valve clack (19), the through-hole department of valve pocket (9) is fixed and is equipped with seal receptacle (18), seal receptacle (18) and valve clack (19) cooperation swing joint, the other end fixedly connected with of drive screw (16) adjusts hand wheel (8), the top of the waterproof seat of second (7) is equipped with protection casing (12), the fixed second screw thread seat (15) that is equipped with in top of protection casing (12), second screw thread seat (15) and drive screw (16) screw thread through connection, the fixed row's of being equipped with cinder notch (26) in the middle part of stop valve body (1) bottom, the surperficial threaded connection of row cinder notch (26) has sealed lid (25), the middle part of sealed lid (25) inner chamber is rotated and is connected with connecting rod (28), the one end transition fit of connecting rod (28) is connected with first filter screen (23) and second filter screen (24), first filter screen (23) and second filter screen (24) are Y shape and distribute, just the one end of first filter screen (23) and the one end of second filter screen (24) all with seal receptacle (18) swing joint.

2. A differential pressure regulating shut-off valve as defined in claim 1, wherein: the fixed oil storage section of thick bamboo (33) that is equipped with in one side of protection casing (12) inner chamber, the inside cooperation swing joint of oil storage section of thick bamboo (33) has hemisphere stopper (29), the fixed piston rod (30) that is equipped with of one end of hemisphere stopper (29), the top fixer of oil storage section of thick bamboo (33) is equipped with leads oil pipe (32), the one end fixedly connected with bifurcated pipe (17) of leading oil pipe (32), two branch pipe departments of bifurcated pipe (17) communicate with each other with second screw thread seat (15) and first screw thread seat (13) respectively.

3. A differential pressure regulating shut-off valve as defined in claim 2, wherein: one end of the piston rod (30) penetrates through the protective cover (12) and is fixedly provided with a pressing cap (31).

4. A differential pressure regulating shut-off valve as defined in claim 1, wherein: the through hole of one end of the second connecting flange (5) and the through hole of one end of the first connecting flange (4) are fixedly provided with extension pipes (2), and the surfaces of the extension pipes (2) are fixedly provided with thread waterproof rings (3).

5. A differential pressure regulating shut-off valve as defined in claim 1, wherein: and a compression spring (14) is fixedly arranged between the second threaded seat (15) and the first threaded seat (13).

6. A differential pressure regulating shut-off valve as defined in claim 1, wherein: the bottom department of protection casing (12) is fixed to be equipped with otic placode (34) of two symmetries, two the middle part of otic placode (34) all through threaded connection have fastening screw (35) and second waterproof seat (7) swing joint.

7. A differential pressure regulating shut-off valve as defined in claim 1, wherein: the bottom mounting of stop valve body (1) is equipped with wear-resisting stabilizer blade (21), the bottom mounting of wear-resisting stabilizer blade (21) is equipped with stable support (22).

8. A differential pressure regulating shut-off valve as defined in claim 1, wherein: an O-shaped ring (27) is fixedly arranged at the joint of the slag discharging port (26) and the sealing cover (25).

9. A differential pressure regulating shut-off valve as defined in claim 1, wherein: an anti-corrosion sleeve (20) is sleeved on the outer side of the transmission screw rod (16) between the valve clack (19) and the second waterproof seat (7).

10. A differential pressure regulating shut-off valve as defined in claim 1, wherein: the first filter screen (23) and the second filter screen (24) are made of brass filter screens and a layer of filter cotton is attached to the brass filter screens.