CN204176012U - A kind of wedge shape ball cryogenic ball valve - Google Patents

A kind of wedge shape ball cryogenic ball valve Download PDF

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Publication number
CN204176012U
CN204176012U CN201420340545.2U CN201420340545U CN204176012U CN 204176012 U CN204176012 U CN 204176012U CN 201420340545 U CN201420340545 U CN 201420340545U CN 204176012 U CN204176012 U CN 204176012U
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CN
China
Prior art keywords
valve
ball
wedge shape
spring
cryogenic
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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.)
Expired - Fee Related
Application number
CN201420340545.2U
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Chinese (zh)
Inventor
张师艳
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.)
TIANJIN STARRY HYDRAULIC TECHNOLOGY Co Ltd
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TIANJIN STARRY HYDRAULIC TECHNOLOGY Co Ltd
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Priority to CN201420340545.2U priority Critical patent/CN204176012U/en
Application granted granted Critical
Publication of CN204176012U publication Critical patent/CN204176012U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model relates to a kind of wedge shape ball cryogenic ball valve, comprises valve body, bearing, wedge shape valve ball, seal ring assembly, spring bracing, helical spring, thrust washer, bonnet assemblies, filler assembly, valve rod and Handleset.Wedge shape valve ball is provided with in described valve body, seal ring assembly is provided with between wedge shape valve ball and valve seat, the lengthening neck of valve gap Stuffing box is provided with filler assembly, between wedge shape valve ball and valve rod, be provided with compression helical spring and spring bracing, spring bracing can subtract spherular design size; Described valve seat and the sealing surface of valve body have the angle of wedge of 2 ° ~ 4.5 °, and it guarantees that valve has good sealing under low temperature and ultralow temperature situation; Wedge shape valve ball has the relief hole of φ 1 ~ φ 10mm, the danger can avoiding Subzero valve in valve pocket owing to producing blast when pressure or temperature anomaly change.

Description

A kind of wedge shape ball cryogenic ball valve
Technical field
The utility model relates to a kind of ball valve, and particularly a kind of ball valve being applicable to low temperature and ultralow temperature, belongs to mechanical manufacturing field.
Background technique
Ball valve is mainly used in fluid or gas pipeline transmission, block fluid or gas are so that maintenance, maintenance or construction, be widely used in the industries such as petroleum refining, long-distance transport pipes, chemical industry, papermaking, pharmacy, water conservancy, electric power, municipal administration and iron and steel, in national economy, occupy very important status.Along with the growth to LNG energy demand, the application of Subzero valve and Cryogenic valve is also more and more wider.
At present, the side-mounted structure of the many employings of General low temperature ball valve, generally being made into by the material of valve seat can the material of low temperature resistant industrial and mineral, and its structural type is also just simple to be lengthened neck.Mainly there is following several respects problem in it: 1, because the just simple material by valve has made low temperature resistant material into, even but low temperature resistant material is under the operating mode of low temperature and ultralow temperature, its intrinsic elastic reaction also can reduce greatly, and is subject to the impact of low-temperature deformation.And the sealing surface of seat of General low temperature ball valve is parallel surface sealing, sealing ring material under low temperature and ultralow-temperature operation conditions cannot auto-compensation low-temperature deformation impact so that affect the sealability of valve.Most of valve can occur in normal temperature situation lower seal performance and can also ensure for this reason, but just loses the automatic compensation function of plastic material in ultralow temperature situation, can produce very large leakage.2, in other instances, even if taken into full account plastic material deformation factor at low temperatures, reserved certain amount of deformation, but owing to reaching the function of sealing by extrusion-deformation, the realization that its sealability is also just temporary transient, its working life also can not be very long, and often switch will leak several times.3, due to when low temperature and ultralow temperature, the pressure of valve pocket and the pressure of pipeline are difficult to be consistent, and Subzero valve will occur like this in valve pocket, produce liquid gasification thus the danger of blasting due to pressure or temperature anomaly fluctuation.In addition, if by medium discharged to valve downstream, be easy to cause danger, this just needs a kind of when the abnormal boosting of valve pocket, and valve by valve pocket pressure discharged to upstream line, and can ensure that valve normally manages disconnected valve.4, General low temperature ball valve, due to structural unreasonable, the volume of its valve ball is excessive, makes the structure of ball valve compact not.This just needs a kind of low temperature seal performance good, and the life-span is long, safety anti-explosive, the high performance low temperature ball valve of compact structure.
Summary of the invention
The utility model provides a kind of low temperature seal performance good for solving in known technology the technical problem that exists, and the life-span is long, safety anti-explosive, the high-performance wedge shape ball cryogenic ball valve of compact structure.
The technological scheme that the utility model is taked for the technical problem existed in solution known technology is:
A kind of wedge shape ball cryogenic ball valve, comprise valve body, bearing, wedge shape valve ball, seal ring assembly, spring bracing, helical spring, thrust washer, bonnet assemblies, filler assembly, valve rod and Handleset, it is characterized in that being provided with wedge shape valve ball in described valve body, wedge shape valve ball is provided with the relief hole that has decompression function; Be provided with seal ring assembly between described wedge shape valve ball and valve body and valve seat, between wedge shape valve ball and valve rod, be provided with the compression helical spring that constant mechanical power is provided and the spring supporting dish for supported spring; Thrust washer is provided with between described valve rod and bonnet assemblies; Described bonnet assemblies is provided with Stuffing box, the lengthening neck of valve gap Stuffing box is provided with filler assembly, and reaches valve stem seal by fastening screw trip bolt and Gland.
The size of described wedge shape valve ball double-wedge face angle is 2 ° ~ 4.5 °, and valve ball side is provided with the relief hole that diameter is φ 1 ~ φ 10mm;
Described spring supporting is placed between helical spring and wedge shape valve ball, it has the opening for placing valve rod and for takeing on the counterbore of locating with wedge valve billiard table;
Described wedge shape valve ball is floating type also can be fixed, and fixed form can adopt dunnage to fix, and integrated valve ball gudgeon also can be adopted to fix or adopt split stationary axle Connecting format between valve ball and valve body.
Wedge shape valve ball has auto-compensation loading structure, this structure is made up of spring bracing, compression helical spring and valve rod.
The advantage that the utility model has and good effect are:
Wedge shape valve ball is for folding wedge face structure and itself and relatively-stationary valve cover chamber are provided with the compression helical spring that can provide constant mechanical power, seal ring and valve body and valve seat and valve ball can be made well to fit under spring and pressure medium acting in conjunction, can avoid like this valve between low temperature and ultralow temperature situation lower sealing surface because of material at low temperature operating mode under shrinkage difference and cause between sealing surface and produce gap, and then make valve under low temperature and ultralow-temperature operation conditions, have good sealability and working life; The spring bracing that wedge shape valve ball adds can subtract spherular size, also reduces the size of whole valve pocket simultaneously, saves the manufacture cost of product and makes structure become compacter; Relief hole can guarantee that the pressure of valve pocket remains consistent with the pressure of the upstream side of valve, the danger avoiding Subzero valve in valve pocket owing to producing blast when pressure or temperature anomaly change.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Fig. 1 is the overall structure schematic diagram of a preferred embodiment of the present utility model;
Fig. 2 is the partial enlarged drawing of Fig. 1;
Fig. 3 is that folding wedge face described in the utility model cryogenic ball valve sealing pair throws off schematic diagram.
In figure: 1, valve body; 1-1, valve body and valve seat sphenoid surface; 2, bearing; 3, Wedge shape ball valve ball; 3-1, relief hole; 3-2, wedge valve billiard table are takeed on; 4, seal ring assembly; 4-1, seal ring; 4-1-1; Seal ring sealing surface; 4-2, trim ring; 5, spring bracing; 5-1, spring bracing counterbore; 5-2, spring bracing are slotted; 6, helical spring; 7, thrust washer; 8, stem bearing; 9, bonnet assemblies; 10, filler assembly; 11, valve rod; 11-1, valve rod shoulder; 12, Handleset.
Embodiment
For summary of the invention of the present utility model, Characteristic can be understood further, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:
Refer to Fig. 1-3, a kind of wedge shape ball cryogenic ball valve, comprise valve body 1, bearing 2, wedge shape valve ball 3, seal ring assembly 4, spring bracing 5, helical spring 6, thrust washer 7, stem bearing 8, bonnet assemblies 9, filler assembly 10, valve rod 11 and Handleset 12, be provided with wedge shape valve ball 3 in described valve body 1, wedge shape valve ball 3 is provided with the relief hole 3-1 that has decompression function, seal ring assembly 4 is provided with between described wedge shape valve ball 3 and valve body and valve seat 1-1, the compression helical spring 6 that constant mechanical power is provided and the spring bracing 5 for supported spring is provided with between wedge shape valve ball 3 and the valve rod shoulder 11-1 of valve rod 11, the trend that spring supporting frame 5 makes wedge shape valve ball 3 and seal ring assembly 4 move downward all the time under the effect of helical spring 6, this makes valve under low temperature and ultralow-temperature operation conditions, cold events due to material produces this respect is eliminated in gap impact by the effect of helical spring 7, thus guarantee the sealing reliability of valve under low temperature and ultralow temperature situation.Be provided with thrust washer 6 between described valve rod 11 and bonnet assemblies 9, moment of torsion when guaranteeing valve rod 11 switch is little; Be provided with filler assembly 10 in described bonnet assemblies 9, and reach the sealing of valve rod 11 by fastening screw trip bolt and Gland, be connected with Handleset 12 in the top of valve rod 11.
Described valve rod 11 is assembled by bearing 8 and bonnet assemblies 9, and it is connected with transmitting torque with wedge shape valve ball 3 by flat groove through spring bracing fluting 5-2, and spring bracing 5 is takeed on 3-2 by its spring bracing counterbore 5-1 and wedge valve billiard table and fixed.
Well fit under helical spring 6 and pressure medium acting in conjunction to make wedge shape valve ball, valve body and valve seat 1-1 and seal ring 4-1, and then under low temperature and ultralow-temperature operation conditions, there is good sealability, above-mentioned wedge shape valve ball 3 sphenoid surface becomes the folding wedge face of 2 ° ~ 4.5 ° with valve shaft, this angle has best sealing effect.
Above-mentioned seal ring assembly 4 is made up of seal ring 4-1 and trim ring 4-2, and its back side of seal ring 4-1 is fixed in trim ring 4-2 by modes such as welding or expanded joints, and guarantees that medium can not along junction plane place seepage; Between seal ring sealing surface 4-1-1 and vertical plane, angle is similarly 2 ° ~ 4.5 °.
In order to subtract spherular design size, spring supporting frame 5 is provided with on wedge shape valve ball 3, helical spring 6 acts on and spring bracing 5 can reduce helical spring 6 and act directly on insufficient space on valve ball 3, reduce the size of wedge shape valve ball 3 and whole valve pocket, compact structure, saves the manufacture cost of product.
In sum: it is good that the utility model has low temperature seal performance, and the life-span is long, the advantage such as safety anti-explosive and compact structure.More than show and describe basic principle of the present utility model, major character and advantage.The technician of the industry should understand; the utility model is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present utility model; under the prerequisite not departing from the utility model spirit and scope, also have various changes and modifications, these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims (5)

1. a wedge shape ball cryogenic ball valve, comprise valve body, bearing, wedge shape valve ball, seal ring assembly, spring bracing, helical spring, thrust washer, bonnet assemblies, filler assembly, valve rod and Handleset, wedge shape valve ball is provided with in described valve flowing channel, wedge shape valve ball is provided with the aperture with decompression function, wedge shape valve ball is connected with valve seat, seal ring assembly is provided with between wedge shape valve ball and valve seat, the compression helical spring that constant mechanical power is provided and spring bracing is provided with between wedge shape valve ball and valve rod, the lengthening neck of valve gap Stuffing box is provided with stem packing and Gland, and be connected with valve gap Stuffing box by fastening screw trip bolt.
2. a kind of wedge shape ball cryogenic ball valve according to claim 1, it is characterized in that: described wedge shape valve ball is designed to the folding wedge face of 2 ° ~ 4.5 °, valve ball side is designed with the relief hole that diameter is φ 1 ~ φ 10mm.
3. a kind of wedge shape ball cryogenic ball valve according to claim 1, is characterized in that: valve ball is provided with spring bracing.
4. a kind of wedge shape ball cryogenic ball valve according to claim 3, it is characterized in that: described spring bracing has auto-compensation loading structure, this structure is made up of spring bracing, compression helical spring and valve rod.
5. a kind of wedge shape ball cryogenic ball valve according to claim 1, it is characterized in that: described wedge shape valve ball is floating type also can be fixed, fixed form can adopt dunnage to fix, and integrated valve ball gudgeon also can be adopted to fix or adopt split stationary axle Connecting format between valve ball and valve body.
CN201420340545.2U 2014-06-25 2014-06-25 A kind of wedge shape ball cryogenic ball valve Expired - Fee Related CN204176012U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420340545.2U CN204176012U (en) 2014-06-25 2014-06-25 A kind of wedge shape ball cryogenic ball valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420340545.2U CN204176012U (en) 2014-06-25 2014-06-25 A kind of wedge shape ball cryogenic ball valve

Publications (1)

Publication Number Publication Date
CN204176012U true CN204176012U (en) 2015-02-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201420340545.2U Expired - Fee Related CN204176012U (en) 2014-06-25 2014-06-25 A kind of wedge shape ball cryogenic ball valve

Country Status (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106552773A (en) * 2016-11-21 2017-04-05 昆山星益沅精密机械有限公司 A kind of thread testing machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106552773A (en) * 2016-11-21 2017-04-05 昆山星益沅精密机械有限公司 A kind of thread testing machine

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20150225

Termination date: 20160625