CN116221429A - Adjustable pressure release valve - Google Patents

Adjustable pressure release valve Download PDF

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Publication number
CN116221429A
CN116221429A CN202310160554.7A CN202310160554A CN116221429A CN 116221429 A CN116221429 A CN 116221429A CN 202310160554 A CN202310160554 A CN 202310160554A CN 116221429 A CN116221429 A CN 116221429A
Authority
CN
China
Prior art keywords
valve
seat
valve rod
spring
pressure relief
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310160554.7A
Other languages
Chinese (zh)
Inventor
倪明
杨天晴
薄伟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Neway Oil Equipment Suzhou Co ltd
Original Assignee
Neway Oil Equipment Suzhou Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Neway Oil Equipment Suzhou Co ltd filed Critical Neway Oil Equipment Suzhou Co ltd
Priority to CN202310160554.7A priority Critical patent/CN116221429A/en
Publication of CN116221429A publication Critical patent/CN116221429A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—Valve members
    • 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
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • 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
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/42—Valve seats
    • 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
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/06—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for adjusting the opening pressure
    • 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
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • 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
    • F16K31/60—Handles
    • 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
    • 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
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Safety Valves (AREA)

Abstract

The invention discloses an adjustable pressure relief valve, which comprises a valve body, a valve cover, a valve seat and a valve rod assembly, wherein the valve seat and the valve rod assembly are arranged in the valve body, the valve rod assembly comprises a valve rod, a valve rod nut and a valve core positioned at the lower end part of the valve rod, the lower end part of the valve core is provided with a valve clack matched with the valve seat, the upper end of the valve core is provided with a spring seat, an elastic piece is arranged between the spring seat and the valve clack, one end of the elastic piece acts on the spring seat, and the other end of the elastic piece acts on the valve clack; the elastic piece is a rectangular spring, and the valve core is automatically separated from the valve seat under a set pressure value by setting the degree of pre-pressing the rectangular spring, so that automatic pressure relief is realized; the valve rod is used for transmitting downward acting force and compressing the elastic element, and when the stroke exceeds the limit state of the elastic element, the valve clack is tightly attached to the valve seat, and the valve is closed.

Description

Adjustable pressure release valve
The present application is a divisional application of the invention patent application with the application number 2020115144044 and the name of the adjustable pressure release valve, which is the application day 2020, 12 and 21.
Technical Field
The invention relates to the technical field of valves, in particular to an adjustable pressure relief valve.
Background
The oil field which is difficult to put into production under the conventional development mode and technology belongs to the marginal oil field, and the application of the unmanned standing platform enables some marginal oil fields to have development benefits to a certain extent along with the development of the marginal oil field and the reduction of the investment requirements of development engineering. The design and use of the simple unmanned oil production platform in ocean engineering reduce the cost, but the equipment facilities of the simple unmanned platform part still need on-site inspection maintenance of staff at a certain time.
In unmanned operation oil recovery gas production platform, the effect of relief valve is adjusted pipeline pressure, plays the switching effect at the settlement pressure value, and satisfies the flow requirement. Because the space of the simple unmanned oil and gas production platform is limited, a hydraulic control station is not arranged, and a pressure relief valve is required to automatically relieve pressure. On the other hand, unmanned platform environments are often severe, and natural gas pipelines and valves often suffer from ice blockage in winter, usually due to the presence of gaseous or liquid water inside the pipelines.
So that the existing pressure release valve pipeline is frequently blocked by ice; the set pressure cannot be regulated, and when the pressure relief valve fails, a manual device for emergency shutdown is not available, so that the on-site maintenance is very inconvenient.
Disclosure of Invention
In view of the above, it is an object of the present invention to provide an improved adjustable pressure relief valve which is capable of adjusting the magnitude of the predetermined pressure and enabling the closing of the valve in an emergency.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the adjustable pressure relief valve comprises a valve body, a valve cover, a valve seat and a valve rod assembly, wherein the valve seat and the valve rod assembly are arranged in the valve body, the valve rod assembly comprises a valve rod, a valve rod nut and a valve core positioned at the lower end part of the valve rod, the lower end part of the valve core is provided with a valve clack matched with the valve seat, the upper end of the valve core is provided with a spring seat, an elastic piece is arranged between the spring seat and the valve clack, one end of the elastic piece acts on the spring seat, and the other end of the elastic piece acts on the valve clack;
the valve rod nut is in threaded connection with the valve rod, and a handle used for driving the valve rod nut to rotate is arranged outside the valve rod nut.
The handle seat is arranged on the valve rod nut, the handle seat is directly sleeved on the valve rod nut, the handle seat is fixedly connected with the valve rod nut, the handle penetrates through the handle seat to be installed on the valve rod nut, and the handle is positioned by the cotter pin, so that the on-site disassembly, assembly, maintenance and replacement are facilitated.
The elastic piece adopts a rectangular spring, is a high-load grinding tool spring, and enables the valve core to be automatically separated from the valve seat at a set pressure value by calculating the degree of the pre-pressing spring, so that automatic pressure relief is realized. The collected natural gas and the like enter the bottom of the inner cavity of the pressure relief valve through a pipeline, the valve core is pushed upwards when the pressure reaches a set value, the downward elastic force of the rectangular spring is overcome, and the valve is opened; when the pressure in the inner cavity is smaller than the set value, the valve core moves downwards under the action of the restoring force of the elastic piece, and the valve is in a closed state.
Through foretell structure, the relief valve with adjustable in this application can pass through handle switching, and the valve rod transmits downward effort, compression spring, when the limit state of stroke beyond the spring, makes valve clack cambered surface and disk seat cambered surface closely laminate, closes the valve by force, realizes shutting off under the emergency.
According to some preferred embodiments of the invention, the spring seat is sleeved outside the valve core and below the valve rod, and a rolling element is arranged between the lower surface of the valve rod and the upper surface of the spring seat. In some embodiments of the invention, the rolling element is a steel ball, and the lower surface of the valve rod and the upper surface of the spring seat are respectively provided with an annular groove, and the steel ball is accommodated in the annular groove. The connection part of the valve rod and the spring seat is provided with a plurality of steel balls, so that the friction is small, the stress is uniform and the durability is better than that of the valve rod and the spring seat by adopting the arrangement of a bearing; the valve rod is driven to move downwards through the rotating handle, the valve rod rotates and transmits the downward acting force to the steel ball, and the spring seat only bears the downward acting force and cannot rotate.
According to some preferred embodiments of the present invention, the valve cover is provided with a gland and a bearing seat, the lower end portion of the valve stem nut is accommodated in a space formed between the bearing seat and the gland, the lower end portion of the valve stem nut has an annular protrusion, the space has an upper bearing and a lower bearing therein, the upper bearing is disposed between an upper surface of the annular protrusion and the bearing seat, and the lower bearing is disposed between a lower surface of the annular protrusion and the gland. The torque is reduced when the handle and the valve rod nut are rotated through the annular convex part in the bearing seat, the upper bearing and the lower bearing, and the device is convenient and labor-saving.
According to some preferred embodiments of the invention, the annular protrusion is provided with an annular washer, and the bearing seat is provided with a fastening bolt corresponding to the annular washer. The annular gasket is a nylon gasket, and when the valve rod nut rotates in place, the fastening bolt is screwed down, the nylon Long Dian is abutted, and the position of the valve rod nut is locked to prevent the valve rod nut from rotating.
According to some preferred embodiments of the present invention, a limiting member sleeved outside the elastic member is further disposed in the valve body, an inner diameter of the limiting member is matched with an outer diameter of the elastic member, and the limiting member is used for limiting movement of the elastic member. In some embodiments of the invention, the lower end of the spring seat has a downwardly extending insert portion that is affixed to the outer surface of the valve stem, the insert portion being located inwardly of the upper end of the resilient member. The movement of the elastic piece is guided by the insertion part, the limiting piece and the valve core.
According to some preferred embodiments of the invention, the upper surface of the valve seat has an annular boss, and the lower surface of the stopper has an annular step fitted on the outer side of the annular boss. The lower end of the limiting piece is tightly matched with the valve seat through the annular boss and the annular step; the upper end of the limiting piece is provided with a limiting table protruding outwards, and the limiting table is propped against the inner wall of the cavity. The upper end and the lower end of the limiting piece are fixed, and a fixing pin is further arranged between the upper end face of the limiting piece and the lower end face of the valve cover, and the position of the limiting piece is fixed through the fixing pin. The limiting piece is also provided with a liquid outlet corresponding to the liquid outlet channel.
According to some preferred embodiments of the invention, the valve body has a liquid inlet channel, a liquid outlet channel and a cavity between the liquid inlet channel and the liquid outlet channel, and the valve seat, the valve clack and the limiting member are accommodated in the cavity.
According to some preferred embodiments of the present invention, the flanges on two sides of the valve body are respectively provided with a detection port, and the detection ports are communicated with the liquid inlet channel or the liquid outlet channel. The detection port detects flow and leakage, and the antifreezing agent can be injected into the detection port to prevent ice blockage. The size of the inlet flange and the outlet flange are different so as to connect different pipelines.
According to some preferred embodiments of the invention, the angle between the inlet channel and the outlet channel and the horizontal plane is 30-40 °. In some embodiments of the present invention, the extending directions of the liquid inlet channel and the liquid outlet channel are parallel, and the included angle between the liquid inlet channel and the liquid outlet channel and the horizontal plane is preferably 35 °, so that the pressure difference is realized when the liquid inlet channel and the liquid outlet channel are fully opened, and the flow requirement is ensured; the pressure release valve can achieve the purpose of blocking removal through the front-back pressure difference throttling reduction effect.
According to some preferred embodiments of the present invention, a protective cover is provided on the top of the valve stem nut, the protective cover has graduations, and the protective cover is made of transparent materials. The protection cover is arranged at the top of the valve rod nut, the movement position of the movement state of the valve rod can be observed through the scale on the protection cover, and the valve flow and the inlet and outlet pressure difference are adjusted by manually adjusting the valve rod to change the compression state of the spring.
Compared with the prior art, the adjustable pressure relief valve is stable in structure, reasonable in structural design, provided with the elastic piece, capable of calculating the degree of pre-pressing the elastic piece, and controlling the set pressure value, so that the valve core is automatically separated from the valve seat at the set pressure value, and automatic pressure relief is realized; the valve rod transmits downward acting force to compress the spring through rotating the handle opening and closing valve, when the stroke exceeds the limit state of the spring, the cambered surface of the valve clack is tightly attached to the cambered surface of the valve seat, the valve is forcibly closed, and the closing under emergency conditions is realized.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a perspective view of an adjustable pressure relief valve according to a preferred embodiment of the present invention;
FIG. 2 is a side view of an adjustable pressure relief valve according to a preferred embodiment of the present invention;
FIG. 3 is a cross-sectional view of C-C of FIG. 2;
FIG. 4 is an enlarged view of section I of FIG. 3;
in the accompanying drawings: valve body-1, valve core-2, valve clack-21, valve seat-3, annular boss-31, spacing piece-4, spacing table-41, O-ring-5, retainer-6, rectangular spring-7, fixing pin-8, thrust pad-9, spring seat-10, insert-101, guide belt-11, nut-12, stud-13, packing-14, gland-15, screw-16, oil cup-17, O-ring-18, valve stem nut-19, valve stem-20, protection cover-21, handle seat-22, handle-23, bolt-24, bearing seat-25, bearing-26, fastening bolt-27, nylon pad-28, guide belt-29, guide belt-30, steel ball-31, valve cover-32, sealing ring-33, plug-34, screw-35, cotter pin-36.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
Referring to fig. 1-4, the adjustable relief valve of the present embodiment includes a valve body 1, a valve cover 32, a gland 15 and a bearing seat 25 disposed on the valve cover 32, a valve seat 3 disposed in the valve body 1, and a valve rod assembly including a valve rod 20, a valve rod nut 19, and a valve core 2 disposed at a lower end portion of the valve rod 20. The valve cover 32 is connected with the valve body 1 through the nut 12 and the stud 13, and a sealing ring 33 is arranged between the joint surface of the valve cover 32 and the valve body 1. The gland 15 is fixed to the valve cover 32 by the screw 16, and the bearing housing 25 is fixed to the valve cover 32 by the bolt 24. A guide belt 29 is arranged between the gland 15 and the valve rod 20, and a valve cover 32 is provided with a packing 14 corresponding to the valve rod 20.
The valve rod nut 19 is in threaded connection with the valve rod 20, and a handle 23 for driving the valve rod nut 19 to rotate is arranged outside the valve rod nut 19. The handle seat 22 is arranged on the valve rod nut 19, the handle seat 22 is directly sleeved on the valve rod nut 19, the handle seat 22 is fixedly connected with the valve rod nut 19, the handle 23 penetrates through the handle seat 22 to be installed on the valve rod nut 19, and then the handle is positioned by the cotter pin 36, so that the on-site disassembly, assembly, maintenance and replacement are facilitated.
The valve body 1 is internally provided with a liquid inlet channel, a liquid outlet channel and a cavity between the liquid inlet channel and the liquid outlet channel, and the valve seat 3, the valve core 2 and the like are accommodated in the cavity. An O-shaped ring 5 and a check ring 6 are arranged on the outer wall of the valve seat 3 and the inner wall of the cavity. The flanges on two sides of the valve body 1 are respectively provided with a detection port which is communicated with the liquid inlet channel or the liquid outlet channel. The detection port detects flow and leakage, and the antifreezing agent can be injected into the detection port to prevent ice blockage. The test port is sealed with a plug 34 when not in use. The size of the inlet flange and the outlet flange are different so as to connect different pipelines.
In the embodiment, the extending directions of the liquid inlet channel and the liquid outlet channel are arranged in parallel, and the included angle between the liquid inlet channel and the liquid outlet channel and the horizontal plane is 35 degrees, so that the pressure difference is realized when the valve is fully opened, and the flow requirement is ensured; the pressure release valve of the embodiment can achieve the purpose of blocking removal through the front-rear differential pressure throttling reduction effect by the aid of the arrangement.
The lower end of the valve core 2 in the valve rod assembly is provided with a valve clack 21 matched with the valve seat 3, the upper end of the valve core 2 is provided with a spring seat 10, an elastic piece is arranged between the spring seat 10 and the valve clack 21, one end of the elastic piece acts on the spring seat 10, and the other end of the elastic piece acts on the valve clack 21. The elastic piece in this embodiment is a rectangular spring 7, which is a high-load grinding tool spring, and the set pressure value is controlled by calculating the degree of the pre-pressing spring, so that the valve core 2 is automatically separated from the valve seat 3 at the set pressure value, and automatic pressure relief is realized. Collected natural gas and the like enter the bottom of the inner cavity of the pressure relief valve through a pipeline, when the pressure reaches a set value, the valve core 2 is pushed upwards, the downward elastic force of the rectangular spring 7 is overcome, and the valve is opened; when the pressure in the inner cavity is smaller than the set value, the valve core 2 moves downwards under the action of the restoring force of the elastic piece, and the valve is in a closed state.
The lower end of the valve stem nut 19 is accommodated in a space formed between the bearing housing 25 and the gland 15, the lower end of the valve stem nut 19 has an annular convex portion, and a bearing 26 including an upper bearing and a lower bearing is provided in the space, the upper bearing being disposed between the upper surface of the annular convex portion and the bearing housing 25, and the lower bearing being disposed between the lower surface of the annular convex portion and the gland 15. The annular convex part in the bearing seat 25, the upper bearing and the lower bearing realize torque reduction when the handle 23 and the valve rod nut 19 are rotated, and the device is convenient and labor-saving. The bearing seat 25 is also provided with an oil cup 17. An O-ring is also provided between the bearing seat 25 and the valve stem nut 19.
The annular convex part is provided with an annular gasket, and the bearing seat 25 is provided with a fastening bolt 27 corresponding to the annular gasket. The ring washer is a nylon washer 28, and when the valve stem nut 19 is rotated into place, the fastening bolt 27 is tightened against the nylon washer 28, locking the position of the valve stem nut 19 against rotation.
The spring seat 10 is sleeved outside the valve core 2 and is positioned below the valve rod 20, and a rolling element is arranged between the lower surface of the valve rod 20 and the upper surface of the spring seat 10. In this embodiment, the rolling member is a steel ball 31, and the lower surface of the valve rod 20 and the upper surface of the spring seat 10 are respectively provided with an annular groove, and the steel ball 31 is accommodated in the annular groove. The connection part of the valve rod 20 and the spring seat 10 is provided with a plurality of steel balls 31, so that compared with the arrangement of the bearing 26, the valve rod has small friction, uniform stress and durability; the handle 23 is rotated to drive the valve rod 20 to move downwards, the valve rod 20 rotates and transmits the downward acting force to the steel ball 31, and the spring seat 10 only bears the downward acting force and cannot rotate.
And a limiting piece 4 sleeved outside the elastic piece is further arranged in the valve body 1, the inner diameter of the limiting piece 4 is matched with the outer diameter of the elastic piece, and the limiting piece 4 is used for limiting the movement of the elastic piece. In this embodiment, the lower end of the spring seat 10 has a downwardly extending insertion portion 101, the insertion portion 101 being attached to the outer surface of the valve stem 20, the insertion portion 101 being located inside the upper end of the elastic member. The movement of the elastic member is guided by the insertion portion 101, the stopper 4, and the valve body 2. The outer wall of the spring seat 10 is provided with a guide belt 11.
The upper surface of the valve seat 3 is provided with an annular boss 31, the lower surface of the limiting piece 4 is provided with an annular step, and the annular step is matched with the outer side of the annular boss 31. The lower end of the limiting piece 4 is tightly matched with the valve seat 3 through the annular boss 31 and the annular step; the upper end of the limiting piece 4 is provided with a limiting table 41 protruding outwards, and the limiting table 41 is propped against the inner wall of the cavity. Thus, the upper end and the lower end of the limiting piece 4 are fixed, and a fixing pin 8 is further arranged between the upper end face of the limiting piece 4 and the lower end face of the valve cover 32, and the position of the limiting piece 4 is fixed through the fixing pin 8. The limiting piece 4 is also provided with a liquid outlet corresponding to the liquid outlet channel. In this embodiment, a thrust pad 9 is further disposed between the upper surface of the stopper 4 and the lower surface of the valve cover 32.
The top of valve rod nut 19 is provided with safety cover 21, has the scale on the safety cover 21, and safety cover 21 is transparent material. The protection cover 21 is installed on the top of the valve rod nut 19, the movement position of the movement state of the valve rod 20 can be observed through the scale on the protection cover, and the valve flow and the inlet and outlet pressure difference are adjusted by manually adjusting the valve rod 20 to change the compression state of the spring.
The adjustable pressure release valve in the embodiment can not only control the magnitude of a preset pressure value by adjusting the compression degree of the spring, but also can be opened and closed by the handle 23, the valve rod 20 transmits downward acting force, the spring is compressed, when the stroke exceeds the limit state of the spring, the cambered surface of the valve clack 21 is tightly attached to the cambered surface of the valve seat 3, the valve is forcibly closed, and the closing under the emergency condition is realized.
The adjustable pressure release valve provided by the invention mainly has the following structure and advantages: (1) the liquid inlet channel and the liquid outlet channel are arranged in parallel, form an included angle of 35 degrees with the horizontal plane, realize pressure difference when the valve is fully opened, and ensure the flow requirement; the flange of the inlet and the outlet is provided with a detection port, so that the flow and leakage are detected, and an antifreezing agent can be injected through the detection port to prevent ice blockage; the inlet flange and the outlet flange are different in size so as to be connected with different pipelines. (2) The high-load grinding tool spring is arranged in the cavity, and the degree of the pre-pressing spring is calculated, so that the valve clack is automatically separated from the valve seat at a set pressure value, and automatic pressure relief is realized. (3) The joint of the valve rod and the spring seat is provided with a plurality of steel balls, so that compared with a bearing structure, the valve rod is small in friction and even in stress, and has durability; the valve rod is driven to move downwards through the rotating handle, the valve rod rotates and transmits the downward acting force to the steel ball, and the spring seat only bears the downward acting force and does not rotate. (4) The detachable handle is arranged, the handle seat is directly sleeved on the valve rod nut, the handle penetrates through the handle seat to be installed on the valve rod nut, and the handle is positioned by the cotter pin, so that the on-site disassembly, assembly, maintenance and replacement are facilitated. (5) The lower part of the annular protruding part at the bottom of the valve rod nut is provided with a bearing for reducing torque, and the bearing is arranged in the bearing seat; a nylon pad is placed on the outer side of the valve rod nut, and a fastening bolt is used for pressing and stopping rotation; the protection cover is arranged at the top of the valve rod nut, the movement state and the position of the valve rod can be observed through the transparent protection cover with scales, and the valve flow and the inlet and outlet pressure difference are adjusted by manually adjusting the valve rod to change the compression state of the spring. The collected natural gas enters the bottom of the pressure relief valve cavity through a pipeline, when the pressure reaches a set value, the valve clack is pushed upwards, the downward elastic force of the rectangular spring is overcome, and the valve is opened; when the cavity pressure is smaller than the set value, the valve core moves downwards under the action of the restoring force of the elastic piece, and the valve is in a closed state. (6) Emergency shutdown: the valve rod transmits downward acting force through the opening and closing of the handle to compress the spring, and when the stroke exceeds the limit state of the spring, the cambered surface of the valve clack is tightly attached to the cambered surface of the valve seat to forcibly close the valve.
The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the present invention and to implement the same, but are not intended to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of the present invention.

Claims (10)

1. An adjustable relief valve, its characterized in that: the valve comprises a valve body, a valve cover, a valve seat and a valve rod assembly, wherein the valve seat and the valve rod assembly are arranged in the valve body, the valve rod assembly comprises a valve rod, a valve rod nut and a valve core positioned at the lower end part of the valve rod, the lower end part of the valve core is provided with a valve clack matched with the valve seat, the upper end of the valve core is provided with a spring seat, an elastic piece is arranged between the spring seat and the valve clack, one end of the elastic piece acts on the spring seat, and the other end of the elastic piece acts on the valve clack;
the elastic piece is a rectangular spring, and the valve core is automatically separated from the valve seat under a set pressure value by setting the degree of pre-pressing the rectangular spring, so that automatic pressure relief is realized; the valve rod is used for transmitting downward acting force and compressing the elastic element, and when the stroke exceeds the limit state of the elastic element, the valve clack is tightly attached to the valve seat, and the valve is closed.
2. The adjustable pressure relief valve of claim 1, wherein: the spring seat is sleeved outside the valve core and is positioned below the valve rod, and a rolling element is arranged between the lower surface of the valve rod and the upper surface of the spring seat; the lower surface of the valve rod and the upper surface of the spring seat are correspondingly provided with annular grooves, and the rolling piece is accommodated in the annular grooves.
3. The adjustable pressure relief valve of claim 2, wherein: the rolling element is a steel ball.
4. The adjustable pressure relief valve of claim 2, wherein: the valve rod nut is in threaded connection with the valve rod, and a handle used for driving the valve rod nut to rotate is arranged outside the valve rod nut.
5. The adjustable pressure relief valve of claim 4, wherein: the valve rod nut is provided with a handle seat, the handle seat is fixedly connected with the valve rod nut, and the handle penetrates through the handle seat and is arranged on the valve rod nut.
6. The adjustable pressure relief valve of claim 5, wherein: the top of the valve rod nut is provided with a protective cover which is made of transparent materials; the protection cover is used for observing the movement position of the valve rod, and the compression state of the spring is changed by adjusting the valve rod, so that the flow rate of the valve and the pressure difference between an inlet and an outlet are adjusted.
7. The adjustable pressure relief valve of claim 1, wherein: the valve body is internally provided with a liquid inlet channel, a liquid outlet channel and a cavity positioned between the liquid inlet channel and the liquid outlet channel, and the valve seat and the valve clack are accommodated in the cavity.
8. The adjustable pressure relief valve of claim 7, wherein: when the pressure in the cavity reaches a set value, the valve core is pushed upwards, the downward elastic force of the rectangular spring is overcome, and the valve is opened; when the pressure in the cavity is smaller than the set value, the valve core moves downwards under the action of the restoring force of the elastic piece, and the valve is in a closed state.
9. The adjustable pressure relief valve of claim 7, wherein: the extending directions of the liquid inlet channel and the liquid outlet channel are arranged in parallel.
10. The adjustable pressure relief valve according to any one of claim 7 wherein: the flanges corresponding to the liquid inlet channel and the liquid outlet channel are different in size.
CN202310160554.7A 2020-12-21 2020-12-21 Adjustable pressure release valve Pending CN116221429A (en)

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CN101334116A (en) * 2008-07-11 2008-12-31 江苏星河集团有限公司 Stop valve of bellows instrument
CN102052493B (en) * 2009-11-10 2013-02-13 北京航天动力研究所 Steam safety valve with backpressure regulating mechanism and elastic valve clack
CN103244691B (en) * 2013-05-17 2016-02-17 江苏星河阀门有限公司 The internal pressure type bellows stop valve that belt switch position is aobvious
CN103511693B (en) * 2013-09-29 2015-08-26 北京航天动力研究所 Backpressure regulation formula steam security valve closed by a kind of valve stem seal type
CN104728485A (en) * 2013-12-23 2015-06-24 青岛万力科技有限公司 Relief stabilizer valve special for firefighting
CN204062052U (en) * 2014-08-21 2014-12-31 上海阀门厂有限公司 A kind of reheater safety valve
CN204942663U (en) * 2015-09-17 2016-01-06 罗浮阀门集团有限公司 A kind of Decompression valves
CN105156692A (en) * 2015-10-08 2015-12-16 江苏神通阀门股份有限公司 Nuclear safety stop valve
CN106567936A (en) * 2016-11-07 2017-04-19 施瑞德阀门(厦门)有限公司 Adjustable type elastic ceramic stop valve
CN110541955B (en) * 2019-10-08 2024-01-26 永一阀门集团有限公司 High-temperature high-pressure safety valve
CN210859941U (en) * 2019-10-23 2020-06-26 浙江良开阀门有限公司 High-pressure reducing valve

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