CN113653807A - Electric vacuum regulating valve for uranium concentration plant - Google Patents

Electric vacuum regulating valve for uranium concentration plant Download PDF

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Publication number
CN113653807A
CN113653807A CN202110897505.2A CN202110897505A CN113653807A CN 113653807 A CN113653807 A CN 113653807A CN 202110897505 A CN202110897505 A CN 202110897505A CN 113653807 A CN113653807 A CN 113653807A
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CN
China
Prior art keywords
valve
corrugated pipe
rod
fixedly connected
valve position
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
CN202110897505.2A
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Chinese (zh)
Inventor
李红彦
袁军
段生鹏
王伟
郁峰
郭卫中
唐建
温伟
张杨
封学智
翟微
石彦华
孙丹
陈伟
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.)
Cnnc Shaanxi Enrichment Co ltd
Xian Aerospace Yuanzheng Fluid Control Co Ltd
Original Assignee
Cnnc Shaanxi Enrichment Co ltd
Xian Aerospace Yuanzheng Fluid Control 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.)
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Publication date
Application filed by Cnnc Shaanxi Enrichment Co ltd, Xian Aerospace Yuanzheng Fluid Control Co Ltd filed Critical Cnnc Shaanxi Enrichment Co ltd
Priority to CN202110897505.2A priority Critical patent/CN113653807A/en
Publication of CN113653807A publication Critical patent/CN113653807A/en
Pending legal-status Critical Current

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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
    • 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
    • F16K1/02—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 with screw-spindle
    • 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
    • F16K1/36—Valve members
    • F16K1/38—Valve members of conical shape
    • F16K1/385—Valve members of conical shape contacting in the closed position, over a substantial axial length, a seat surface having the same inclination
    • 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
    • F16K1/46—Attachment of sealing rings
    • 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
    • F16K1/48—Attaching valve members to screw-spindles
    • F16K1/487—Attaching valve members to screw-spindles by a fixing element extending in the axial direction of the spindle, e.g. a screw
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F16K37/0008—Mechanical means
    • 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
    • F16K41/00—Spindle sealings
    • F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
    • 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
    • F16K41/00—Spindle sealings
    • F16K41/10—Spindle sealings with diaphragm, e.g. shaped as bellows or tube
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/022—Test plugs for closing off the end of a pipe

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Details Of Valves (AREA)

Abstract

The invention belongs to the technical field of uranium enrichment processes, and particularly discloses an electric vacuum regulating valve for a uranium enrichment factory, which comprises a valve body, a valve core, a valve rod, a corrugated pipe welding pressing plate, an actuating mechanism, a support and a middle flange; the valve core and the corrugated pipe are positioned in the valve body, the valve core is connected with the inner surface of the valve body in a joint way, the corrugated pipe is positioned above the valve core, and the corrugated pipe is fixedly connected with the valve core; the middle flange is positioned above the valve body and is fixedly connected with the valve body; the corrugated pipe welding pressure plate is positioned between the middle flange and the valve body and above the corrugated pipe, and the corrugated pipe welding pressure plate is fixedly connected with the corrugated pipe; the bracket is positioned above the middle flange and fixedly connected with the middle flange; the actuating mechanism is positioned above the bracket and is fixedly connected with the bracket; the valve rod is located inside the corrugated pipe, the top of the valve rod extends into the inner through hole of the support, and the bottom of the valve rod is located in the opening of the valve core. The invention has good sealing performance and high adjusting precision and can detect the leakage of the medium.

Description

Electric vacuum regulating valve for uranium concentration plant
Technical Field
The invention belongs to the technical field of uranium enrichment processes, and particularly relates to an electric vacuum regulating valve for a uranium enrichment plant.
Background
The electric vacuum regulating valve is pushed by the actuating mechanism, and the purposes of regulating medium flow and stabilizing pressure behind the valve are achieved by changing the flow area between the valve core and the valve seat.
The valve rod and the valve core of the existing vacuum regulating valve are directly connected through threads, so that the requirement on the machining precision of the valve rod and the valve core is extremely high; when the valve core is contacted with the valve seat, the position deviation is easy to occur, so that the sealing performance is poor when the valve is closed;
in addition, the valve with the conventional corrugated pipe structure has large heat dissipation area, so that the material temperature is easily reduced to generate desublimation crystallization, and the normal work of the corrugated pipe and the smooth transportation of media are not facilitated;
meanwhile, the vacuum regulating valve needs to be provided with the minimum through-flow capacity of the valve under various complex working conditions in the operation process, and no valve capable of regulating the minimum through-flow capacity exists at present;
in addition, the life of the bellows is closely related to the amount of compression. The compression range of the bellows of the currently used bellows valve is determined at the beginning of design and cannot be changed. The method cannot adapt to variable working conditions on a uranium concentration process pipeline;
finally, the reliability of the bellows in the uranium enrichment process line is of paramount importance. When the service life test of the corrugated pipe is carried out in the early stage, the medium leakage when the corrugated pipe is broken needs to be detected in time. However, there is no vacuum regulating valve which can detect leakage conveniently in time during life test.
Therefore, it is highly desirable to develop an electric vacuum regulating valve for uranium enrichment plants, which can effectively overcome the above technical problems.
Disclosure of Invention
The invention aims to provide an electric vacuum regulating valve for a uranium concentration plant, which can meet the requirements of internal sealing and external sealing of a valve channel under the working condition of a uranium concentration process, has high regulating precision and can detect the cracking and leakage of a corrugated pipe during the service life test of the valve.
The technical scheme for realizing the purpose of the invention is as follows:
an electric vacuum regulating valve for a uranium enrichment plant, the electric vacuum regulating valve comprising: the valve comprises a valve body, a valve core, a valve rod, a corrugated pipe welding pressure plate, an actuating mechanism, a support and a middle flange; the valve core and the corrugated pipe are both positioned in the valve body, the valve core is connected with the inner surface of the valve body in a joint way, the corrugated pipe is positioned above the valve core, and the corrugated pipe is fixedly connected with the valve core; the middle flange is positioned above the valve body and is fixedly connected with the valve body; the corrugated pipe welding pressure plate is positioned between the middle flange and the valve body and above the corrugated pipe, and the corrugated pipe welding pressure plate is fixedly connected with the corrugated pipe; the bracket is positioned above the middle flange and fixedly connected with the middle flange; the actuating mechanism is positioned above the bracket and is fixedly connected with the bracket; the valve rod is located inside the corrugated pipe, the top of the valve rod extends into the inner through hole of the support, and the bottom of the valve rod is located in the opening of the valve core.
Furthermore, the corrugated pipe is fixedly connected with the valve core through welding, and the corrugated pipe welding pressure plate is fixedly connected with the corrugated pipe through welding.
Further, the electric vacuum regulator valve further comprises: the self-adaptive connecting ball head is positioned below the valve rod and fixedly connected with the valve rod, the locking nut is sleeved on the valve rod and positioned above the valve core, and the locking nut is respectively and fixedly connected with the valve rod and the valve core; the disc spring is sleeved on the valve rod and is positioned between the locking nut and the self-adaptive connecting ball head, and the disc spring is connected with the locking nut and the self-adaptive connecting ball head in a joint mode respectively.
Furthermore, the self-adaptive connecting ball head is fixedly connected with the valve rod through threads, and the locking nut is fixedly connected with the valve rod and the valve core through threads respectively.
Further, the electric vacuum regulator valve further comprises: the valve position adjusting nut is sleeved on the valve rod and positioned below the limiting retaining ring, an inner hole of the valve position adjusting nut is in clearance fit with the valve rod, and the valve position adjusting nut is movably connected with the support; the valve position locking screw penetrates through the side wall of the support, the valve position locking screw is movably connected with the support, the free end of the valve position locking screw is tightly propped against the valve position adjusting nut, and the mounting position of the valve position adjusting nut is locked.
Further, the electric vacuum regulator valve further comprises: the valve position indicating device comprises a valve position indicating rod, a valve position indicating plate and a valve position indicating block, wherein the valve position indicating plate is provided with valve position scales and is fixedly arranged in an indicating groove on the side wall of a support, the valve position indicating block is sleeved at the top end of a valve rod, and the valve position indicating block is fixedly connected with the valve rod; the valve position indicating rod is positioned between the valve position indicating block and the support, one end of the valve position indicating rod is fixedly connected with the valve position indicating block, and the other end of the valve position indicating rod extends into the middle position of the indicating groove on the side wall of the support.
Further, an output shaft of the actuating mechanism is fixedly connected with the valve rod and the valve position indicating block.
Further, the electric vacuum regulator valve further comprises: the check nut and the lock nut are sequentially sleeved on an output shaft of the actuating mechanism from top to bottom, the lock nut is located above the valve position indicating block, the check nut and the lock nut are movably connected with the output shaft of the actuating mechanism respectively, the lock nut is connected with the valve position indicating block in a joint mode, and the check nut is connected with the lock nut in a joint mode and used for locking the position of the valve position indicating block.
Further, the electric vacuum regulator valve further comprises: leak hunting end cap and leak hunting hole, on the periphery of flange in the leak hunting hole is located, leak hunting hole and the annular hole intercommunication of flange bottom in, annular hole and bellows inner chamber through connection, leak hunting end cap and leak hunting hole phase-match, leak hunting end cap and leak hunting hole pass through sealed screw thread and can dismantle the connection.
Further, the electric vacuum regulator valve further comprises: the valve rod is sleeved with the shaft sleeve, the shaft sleeve is positioned in the shaft sleeve, the shaft sleeve baffle is positioned at the upper end of the shaft sleeve, and the shaft sleeve baffle, the shaft sleeve and the middle flange are fixedly connected.
Further, the electric vacuum regulator valve further comprises: and the large sealing ring is positioned between the middle flange and the valve body and is respectively connected with the middle flange and the valve body in a joint way.
Further, the electric vacuum regulator valve further comprises: and the sealing gasket is positioned between the corrugated pipe welding pressing plate and the valve body and is respectively connected with the corrugated pipe welding pressing plate and the valve body in a joint way.
Further, the electric vacuum regulator valve further comprises: and the small sealing ring is positioned between the corrugated pipe welding pressing plate and the middle flange and is respectively connected with the corrugated pipe welding pressing plate and the middle flange in a joint mode.
Further, the electric vacuum regulator valve further comprises: and the valve rod sealing ring is positioned between the bottom of the valve rod and the middle flange and is respectively connected with the valve rod and the middle flange in a joint way.
The invention has the beneficial technical effects that:
1. the electric vacuum regulating valve for the uranium enrichment factory provided by the invention solves the requirement of external sealing required by the valve through the sealing connection of the corrugated pipe, the valve core and the corrugated pipe welding pressing plate, and meets the requirement of sealing in a channel in a uranium hexafluoride medium through the self-adaptive valve core and valve seat sealing structure consisting of the valve core, the self-adaptive connecting ball head, the disk spring, the locking nut and the valve rod.
2. The electric vacuum regulating valve for the uranium concentration factory reduces the heat dissipation area of the valve through the built-in corrugated pipe sealing structure consisting of the valve body, the valve core, the corrugated pipe, the sealing gasket, the large sealing ring, the small sealing ring and the corrugated pipe welding pressing plate, so that a uranium hexafluoride medium in the valve keeps a certain temperature, and the corrugated pipe is prevented from being solidified in a corrugated pipe gap to deform and leak. Meanwhile, the structure enables the outer surface of the valve body to be easier to heat and preserve heat, and effectively solves the problems that the conventional corrugated pipe valve is higher in height in the axial direction of the valve rod, large in heat dissipation area and difficult to wrap the outside of the valve for heat preservation.
3. The invention provides an electric vacuum regulating valve for a uranium concentration plant, which can set K of the minimum opening degree of the valve through a valve position regulating structure consisting of a limiting check ring and a valve position regulating nutVThe valve meets the requirement of the working condition of the uranium concentration process on the flow capacity of the valve.
4. The invention provides an electric vacuum regulating valve for a uranium concentration plant, which realizes real-time indication of the valve opening in the working process through a valve position indication structure consisting of a valve position indication rod, a valve position indication plate and a valve position indication block. Meanwhile, the valve can adjust the compression amount range of the corrugated pipe through the position adjustment of the locknut and the locknut according to the difference of the depth of the output shaft of the actuating mechanism screwed into the valve rod, so that the valve adapts to different internal pressure working conditions.
5. The electric vacuum regulating valve for the uranium concentration plant provided by the invention can detect medium leakage during the service life test of the corrugated pipe through the corrugated pipe service life test leakage detection structure consisting of the annular hole, the leakage detection hole and the leakage detection plug which are arranged on the middle flange.
Drawings
FIG. 1 is a schematic structural diagram of an electric vacuum regulating valve for a uranium enrichment plant according to the present invention;
FIG. 2 is a partial enlarged view of a self-adaptive valve core sealing structure in an electric vacuum regulating valve for a uranium enrichment plant, which is provided by the invention;
FIG. 3 is a partial enlarged view of a bellows assembly sealing structure in an electric vacuum regulator valve for a uranium enrichment plant according to the present invention;
fig. 4 is a partial enlarged view of the small screw, the shaft sleeve baffle, the shaft sleeve and the shaft sleeve in the electric vacuum regulating valve for the uranium enrichment plant provided by the invention.
In the figure: 1-a valve body; 2-a valve core; 3-connecting the ball head in a self-adaptive manner; 4-a disc spring; 5-locking the nut; 6-valve stem; 7-a bellows; 8-a sealing gasket; 9-leakage detection of a plug; 10-large sealing ring; 11-small sealing ring; 12-a leak detection hole; 13-corrugated pipe welding pressing plate; 14-valve position locking screw; 15-valve position indicating rod; 16-valve position indication board; 17-an actuator; 18-a scaffold; 19-locking screws; 20-locknuts; 21-a lock nut; 22-valve position indication block; 23-a middle flange; 24-a limit retainer ring; 25-valve body locking screw; 26-valve position adjusting nut; 27-small screws; 28-shaft sleeve baffle; 29-shaft sleeve; 30-a shaft sleeve; 31-valve stem seal ring.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
As shown in fig. 1, the present invention provides an electric vacuum regulating valve for a uranium enrichment plant, including: the valve comprises a valve body 1, a valve core 2, a self-adaptive connecting ball 3, a disc spring 4, a locking nut 5, a valve rod 6, a corrugated pipe 7, a sealing gasket 8, a leakage detection plug 9, a large sealing ring 10, a small sealing ring 11, a leakage detection hole 12, a corrugated pipe welding pressing plate 13, a valve position locking screw 14, a valve position indicating rod 15, a valve position indicating plate 16, an actuating mechanism 17, a support 18, a locking screw 19, a locking nut 20, a locking nut 21, a valve position indicating block 22, a middle flange 23, a limiting retainer ring 24, a valve body locking screw 25, a valve position adjusting nut 26, a small screw 27, a shaft sleeve baffle 28, a shaft sleeve 29, a shaft sleeve 30 and a valve rod sealing ring 31.
As shown in fig. 1, the valve core 2 is positioned in a lower recess of the valve body 1, and the conical surface of the valve core 2 is in joint connection with the inner surface of the valve body 1; the corrugated pipe 7 is positioned in the valve body 1 and above the valve core 2, and the valve core 2 is fixedly connected with the bottom end of the corrugated pipe 7 through welding to realize sealing; the middle flange 23 is positioned above the valve body 1, the corrugated pipe welding pressing plate 13 is positioned between the middle flange 23 and the valve body 1 and above the corrugated pipe 7, and the corrugated pipe welding pressing plate 13 is fixedly connected with the top end of the corrugated pipe 7 through welding to realize sealing; the middle flange 23 and the valve body 1 are fastened together by a valve body locking screw 25, and the bellows welding pressure plate 13 is fixedly arranged between the middle flange 23 and the valve body 1. The longitudinal section of the bracket 18 is I-shaped, the bracket 18 is positioned above the middle flange 23, and the bracket 18 and the middle flange 23 are fastened together through valve body locking screws 25. The actuator 17 is positioned above the bracket 18, and the actuator 17 is fixedly connected with the bracket 18 through a locking screw 19. The valve stem 6 is located inside the bellows 7, the top of the valve stem 6 extending into the internal through hole of the bracket 18, and the bottom of the valve stem 6 being located within the opening of the valve cartridge 2.
As shown in fig. 2, the adaptive connection ball 3 is a hemisphere with an upward opening, the adaptive connection ball 3 is located below the valve rod 6, an external thread is arranged on the outer side of the bottom end of the valve rod 6, an internal thread is arranged on the inner side of the opening of the adaptive connection ball 3, and the valve rod 6 with the external thread and the adaptive connection ball 3 with the internal thread are connected through thread fastening. The locking nut 5 is sleeved on the valve rod 6 and is positioned on the valve core 2; the inner side of the locking nut 5 is provided with internal threads, and the locking nut 5 with the internal threads is fixedly connected with the valve rod 6 with the external threads through threads; the outer side of the locking nut 5 is provided with an external thread, the inner side of the opening of the valve core 2 is provided with an internal thread, and the locking nut 5 with the external thread is fixedly connected with the valve core 2 with the internal thread through the thread. A disc spring 4 is arranged between the locking nut 5 and the self-adaptive connecting ball head 3, the disc spring 4 is sleeved on the valve rod 6, and the disc spring 4 is connected with the locking nut 5 and the self-adaptive connecting ball head 3 in a joint mode. The valve core 2, the self-adaptive connecting ball head 3, the disc spring 4, the locking nut 5 and the valve rod 6 form a self-adaptive sealing structure.
In the closing process of the valve, the valve core 2 is in point contact with the self-adaptive connecting ball head 3 and can rotate along the contact point, so that the deviation of the valve rod 6 generated in the machining and assembling processes can be eliminated in the closing process, the conical sealing surface of the valve core 2 is tightly attached to the conical sealing surface of the valve body 1, and reliable sealing is realized.
As shown in fig. 3, a large sealing ring 10 is arranged between the middle flange 23 and the valve body 1, and the large sealing ring 10 is respectively connected with the middle flange 23 and the valve body 1 in a joint manner to realize sealing between the middle flange 23 and the valve body 1.
A sealing gasket 8 is arranged between the corrugated pipe welding pressing plate 13 and the valve body 1, and the sealing gasket 8 is respectively connected with the corrugated pipe welding pressing plate 13 and the valve body 1 to realize the sealing between the corrugated pipe welding pressing plate 13 and the valve body 1.
A small sealing ring 11 is arranged between the corrugated pipe welding pressing plate 13 and the middle flange 23, and the small sealing ring 11 is respectively connected with the corrugated pipe welding pressing plate 13 and the middle flange 23 in a joint mode to realize sealing between the corrugated pipe welding pressing plate 13 and the middle flange 23. As shown in fig. 3, the sealing gasket 8, the large sealing ring 10 and the small sealing ring 11 form a sealing structure of the bellows assembly.
As shown in fig. 1, a stem gasket 31 is disposed between the bottom of the stem 6 and the middle flange 23, and the stem gasket 31 is respectively connected to the stem 6 and the middle flange 23 in a joint manner to seal the stem 6 and the middle flange 23.
The valve core 2, the corrugated pipe 7 and the corrugated pipe welding pressing plate 13 form a novel corrugated pipe assembly through welding, the built-in corrugated pipe structure reduces the heat dissipation area of the valve, working media are not easy to be condensed into solid in a corrugated pipe gap to cause deformation and leakage of the corrugated pipe, and the outer surface of the valve body is easier to heat and preserve heat.
As shown in fig. 1, an annular groove is formed in the upper portion of the valve rod 6 located in the inner through hole of the bracket 18, and the limit retainer ring 24 is an open elastic part and is clamped on the annular groove of the valve rod 6. Valve position adjusting nut 26 is located the below of spacing retaining ring 24 on valve rod 6 is located to the cover, and valve position adjusting nut 26's hole and valve rod 6 are clearance fit, and valve position adjusting nut 26's lower part outside is equipped with the external screw thread, and the through-hole inboard of support 18 is equipped with the internal thread, and valve position adjusting nut 26 that has the external screw thread passes through the screw thread with support 18 that has the internal thread and is connected, and valve position adjusting nut 26 can reciprocate along valve rod 6 axial through the rotation. The valve position locking screw 14 penetrates through the side wall of the support 18 at the corresponding position of the upper portion of the valve position adjusting nut 26, the valve position locking screw 14 is provided with external threads, the side wall of the support 18 is provided with internal threads at the penetrating position, the valve position locking screw 14 with the external threads is connected with the support 18 with the internal threads through threads, the free end of the valve position locking screw 14 is tightly propped against the outer side of the upper portion of the valve position adjusting nut 26, and the installation position of the valve position adjusting nut 26 is locked.
The minimum opening degree of the valve is determined by the joint position of the limit stop ring 24 and the valve position adjusting nut 26. The Kv value of the stent 18 indicates that the position is calibrated. When the valve position adjusting nut 26 is rotated to the position indicated by the corresponding Kv of the bracket 18, the Kv value of the valve at the minimum opening degree is obtained. After the valve position adjusting nut 26 is adjusted to the actually required position, the position of the valve position adjusting nut 26 is locked by the valve position locking screw 14.
As shown in fig. 1, an indicating groove is arranged on the side wall of the bracket 18, and a valve position indicating plate 16 with valve position scales is arranged on the indicating groove; the top cover of valve rod 6 is equipped with valve position indication block 22, and valve position indication block 22 is fixed through lock nut 21 with valve rod 6.
The valve position indicating rod 15 is positioned between the valve position indicating block 22 and the bracket 18, an external thread is arranged at one end of the valve position indicating rod 15, one end of the valve position indicating rod 15 with the external thread is connected with the valve position indicating block 22 with an internal thread hole through a thread, namely the valve position indicating rod 15 with the external thread is screwed into the internal thread hole of the valve position indicating block 22; the other end of the valve position indicating rod 15 extends to the middle position of the indicating groove on the side wall of the bracket 18.
An external thread is arranged on an output shaft of the actuating mechanism 17, an internal thread is arranged on a top opening of the valve rod 6, an internal thread is arranged on a central through hole of the valve position indicating block 22, the output shaft with the external thread of the actuating mechanism 17 is in threaded connection with the top opening with the internal thread of the valve rod 6 and the central through hole with the internal thread of the valve position indicating block 22, namely, the output shaft with the external thread of the actuating mechanism 17 is screwed into the central through hole with the internal thread of the valve position indicating block 22 and the top opening with the internal thread of the valve rod 6.
An output shaft with external threads of the actuating mechanism 17 is sequentially sleeved with a locknut 20 and a locknut 21 from top to bottom, the locknut 21 is positioned above a valve position indicating block 22, the locknut 20 and the locknut 21 are respectively movably connected with the output shaft of the actuating mechanism 17 through threads, the locknut 21 is connected with the valve position indicating block 22 in a jointing mode, and the locknut 20 is connected with the locknut 21 in a jointing mode.
When the threaded output shaft of the actuator 17 is screwed into the internal thread at the top of the valve rod 6, the lock nut 21 is rotated to tightly attach the lock nut 21 to the valve position indicating block 22, and then the lock nut 20 is rotated to tightly attach the lock nut 20 to the lock nut 21. In the working process of the valve, the working position of the valve is judged by observing the position of the valve position indicating rod 15 on the valve position indicating plate 16 with valve position scales, and meanwhile, the valve position indicating rod 15 can prevent the rotation of an output shaft with external threads of the actuating mechanism 17 when the valve works through the middle position of an indicating groove machined on the bracket 18.
According to different internal pressures of the valve, the depth of screwing the output shaft with the external thread of the actuating mechanism 17 into the valve rod 6 with the internal thread is adjusted, after the output shaft with the external thread is screwed to a required position, the locknut 21 is rotated to be tightly attached to the valve position indicating block 22, and then the locknut 20 is rotated to be tightly attached to the locknut 20. Thereby making the bellows 7 work under different compression states to adapt to different internal working pressures of the valve.
As shown in fig. 1, an annular hole is formed in the bottom of the middle flange 23, the annular hole is in through connection with the inner cavity of the bellows 7, a leak detection hole 12 is formed in the periphery of the middle flange 23, the leak detection hole 12 is communicated with the annular hole, the leak detection plug 9 is matched with the leak detection hole 12, and the leak detection plug 9 is connected with the leak detection hole 12 through detachable sealing threaded connection.
When a valve life test is carried out, the leakage detecting plug 9 is detached, when the corrugated pipe 7 is broken, airflow enters the leakage detecting hole 12 along the annular hole of the middle flange 23, the pressure in the corrugated pipe is led out through the leakage detecting hole 12, and corrugated pipe leakage can be detected at the leakage detecting hole 12.
Fig. 4 shows a partially enlarged view of the small screw 27, the sleeve stopper 28, the sleeve 29, and the shaft sleeve 30.
The valve rod 6 is sleeved with the shaft sleeve 30, the shaft sleeve 30 is located on an inner boss of the middle flange 23, the shaft sleeve 29 is installed in the shaft sleeve 30 and used for guiding the movement of the valve rod 6, the shaft sleeve baffle 28 is installed at the upper end of the shaft sleeve 30 and used for preventing the shaft sleeve 29 from coming out of the installation groove, and the small screw 27 penetrates through the shaft sleeve baffle 28 and the shaft sleeve 30 and then is screwed into the inner boss of the middle flange 23, so that the shaft sleeve baffle 28, the shaft sleeve 30 and the middle flange 23 are fastened together.
The present invention has been described in detail with reference to the drawings and examples, but the present invention is not limited to the examples, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present invention. The prior art can be adopted in the content which is not described in detail in the invention.

Claims (14)

1. An electric vacuum regulating valve for a uranium enrichment plant, the electric vacuum regulating valve comprising: the valve comprises a valve body (1), a valve core (2), a valve rod (6), a corrugated pipe (7), a corrugated pipe welding pressure plate (13), an actuating mechanism (17), a support (18) and a middle flange (23); the valve core (2) and the corrugated pipe (7) are both positioned in the valve body (1), the valve core (2) is connected with the inner surface of the valve body (1) in a joint manner, the corrugated pipe (7) is positioned above the valve core (2), and the corrugated pipe (7) is fixedly connected with the valve core (2); the middle flange (23) is positioned above the valve body (1), and the middle flange (23) is fixedly connected with the valve body (1); the corrugated pipe welding pressure plate (13) is positioned between the middle flange (23) and the valve body (1) and above the corrugated pipe (7), and the corrugated pipe welding pressure plate (13) is fixedly connected with the corrugated pipe (7); the bracket (18) is positioned above the middle flange (23), and the bracket (18) is fixedly connected with the middle flange (23); the actuating mechanism (17) is positioned above the bracket (18), and the actuating mechanism (17) is fixedly connected with the bracket (18); the valve rod (6) is positioned inside the corrugated pipe (7), the top of the valve rod (6) extends into the inner through hole of the support (18), and the bottom of the valve rod (6) is positioned in the opening of the valve core (2).
2. An electric vacuum regulating valve for a uranium enrichment plant according to claim 1, wherein the bellows (7) is fixedly connected with the valve core (2) by welding, and the bellows welding pressure plate (13) is fixedly connected with the bellows (7) by welding.
3. An electrically operated vacuum regulator valve for a uranium enrichment plant according to claim 1, further comprising: the self-adaptive valve comprises a self-adaptive connecting ball head (3), a disc spring (4) and a locking nut (5), wherein the self-adaptive connecting ball head (3) is positioned below a valve rod (6), the self-adaptive connecting ball head (3) is fixedly connected with the valve rod (6), the locking nut (5) is sleeved on the valve rod (6) and positioned above a valve core (2), and the locking nut (5) is respectively fixedly connected with the valve rod (6) and the valve core (2); the disc spring (4) is sleeved on the valve rod (6) and is positioned between the locking nut (5) and the self-adaptive connecting ball head (3), and the disc spring (4) is connected with the locking nut (5) and the self-adaptive connecting ball head (3) in a joint mode.
4. The electric vacuum regulating valve for the uranium enrichment plant according to claim 3, wherein the adaptive connecting ball head (3) is fixedly connected with the valve rod (6) through threads, and the locking nut (5) is fixedly connected with the valve rod (6) and the valve core (2) through threads respectively.
5. An electrically operated vacuum regulator valve for a uranium enrichment plant according to claim 1, further comprising: the valve position adjusting device comprises a valve position locking screw (14), a limiting check ring (24) and a valve position adjusting nut (26), wherein the limiting check ring (24) is clamped on an annular groove at the upper part of a valve rod (6), the valve position adjusting nut (26) is sleeved on the valve rod (6) and is positioned below the limiting check ring (24), an inner hole of the valve position adjusting nut (26) is in clearance fit with the valve rod (6), and the valve position adjusting nut (26) is movably connected with a support (18); the valve position locking screw (14) penetrates through the side wall of the support (18), the valve position locking screw (14) is movably connected with the support (18), the free end of the valve position locking screw (14) is tightly propped against the valve position adjusting nut (26), and the installation position of the valve position adjusting nut (26) is locked.
6. An electrically operated vacuum regulator valve for a uranium enrichment plant according to claim 1, further comprising: the valve position indicating device comprises a valve position indicating rod (15), a valve position indicating plate (16) and a valve position indicating block (22), wherein the valve position indicating plate (16) is provided with valve position scales, the valve position indicating plate (16) is fixedly arranged in an indicating groove on the side wall of a support (18), the valve position indicating block (22) is sleeved at the top end of a valve rod (6), and the valve position indicating block (22) is fixedly connected with the valve rod (6); the valve position indicating rod (15) is located between the valve position indicating block (22) and the support (18), one end of the valve position indicating rod (15) is fixedly connected with the valve position indicating block (22), and the other end of the valve position indicating rod (15) extends into the middle position of an indicating groove in the side wall of the support (18).
7. An electric vacuum regulating valve for a uranium enrichment plant according to claim 6, wherein the output shaft of the actuator (17) is fixedly connected with the valve rod (6) and the valve position indicating block (22).
8. An electrically operated vacuum regulator valve for a uranium enrichment plant according to claim 7, further comprising: the check nut (20) and the lock nut (21), the check nut (20) and the lock nut (21) are sequentially sleeved on an output shaft of the actuating mechanism (17) from top to bottom, the lock nut (21) is located above the valve position indicating block (22), the check nut (20) and the lock nut (21) are movably connected with the output shaft of the actuating mechanism (17) respectively, the lock nut (21) is connected with the valve position indicating block (22) in a joint mode, and the check nut (20) is connected with the lock nut (21) in a joint mode and used for locking the position of the valve position indicating block (22).
9. An electrically operated vacuum regulator valve for a uranium enrichment plant according to claim 1, further comprising: leak hunting end cap (9) and leak hunting hole (12), leak hunting hole (12) are located in the periphery of flange (23), leak hunting hole (12) and the annular ring intercommunication of flange (23) bottom in, annular ring and bellows (7) inner chamber through connection, leak hunting end cap (9) and leak hunting hole (12) phase-match, leak hunting end cap (9) can be dismantled through sealed screw with leak hunting hole (12) and be connected.
10. An electrically operated vacuum regulator valve for a uranium enrichment plant according to claim 1, further comprising: the novel valve comprises a shaft sleeve baffle (28), a shaft sleeve (29) and a shaft sleeve (30), wherein the shaft sleeve (30) is sleeved on the valve rod (6) and is located on an inner boss of the middle flange (23), the shaft sleeve (29) is sleeved on the valve rod (6) and is located in the shaft sleeve (30), the shaft sleeve baffle (28) is located at the upper end of the shaft sleeve (30), and the shaft sleeve baffle (28), the shaft sleeve (30) and the middle flange (23) are fixedly connected.
11. An electrically operated vacuum regulator valve for a uranium enrichment plant according to claim 1, further comprising: the large sealing ring (10) is positioned between the middle flange (23) and the valve body (1), and the large sealing ring (10) is connected with the middle flange (23) and the valve body (1) in a joint mode.
12. An electrically operated vacuum regulator valve for a uranium enrichment plant according to claim 1, further comprising: and the sealing gasket 8 is positioned between the corrugated pipe welding pressing plate (13) and the valve body (1), and the sealing gasket 8 is respectively connected with the corrugated pipe welding pressing plate (13) and the valve body (1).
13. An electrically operated vacuum regulator valve for a uranium enrichment plant according to claim 1, further comprising: the small sealing ring (11) is positioned between the corrugated pipe welding pressing plate (13) and the middle flange (23), and the small sealing ring (11) is respectively connected with the corrugated pipe welding pressing plate (13) and the middle flange (23).
14. An electrically operated vacuum regulator valve for a uranium enrichment plant according to claim 1, further comprising: and the valve rod sealing ring (31) is positioned between the bottom of the valve rod (6) and the middle flange (23), and the valve rod sealing ring (31) is respectively connected with the valve rod (6) and the middle flange (23) in a joint manner.
CN202110897505.2A 2021-08-05 2021-08-05 Electric vacuum regulating valve for uranium concentration plant Pending CN113653807A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110897505.2A CN113653807A (en) 2021-08-05 2021-08-05 Electric vacuum regulating valve for uranium concentration plant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110897505.2A CN113653807A (en) 2021-08-05 2021-08-05 Electric vacuum regulating valve for uranium concentration plant

Publications (1)

Publication Number Publication Date
CN113653807A true CN113653807A (en) 2021-11-16

Family

ID=78478540

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110897505.2A Pending CN113653807A (en) 2021-08-05 2021-08-05 Electric vacuum regulating valve for uranium concentration plant

Country Status (1)

Country Link
CN (1) CN113653807A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114877260A (en) * 2022-04-13 2022-08-09 中海石油气电集团有限责任公司 High compact LNG sample gasification equipment with self-adaptation function

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114877260A (en) * 2022-04-13 2022-08-09 中海石油气电集团有限责任公司 High compact LNG sample gasification equipment with self-adaptation function
CN114877260B (en) * 2022-04-13 2024-03-08 中海石油气电集团有限责任公司 High compact LNG sampling gasification device with self-adaptation function

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