CN202756655U - Ultra-low temperature ball valve - Google Patents
Ultra-low temperature ball valve Download PDFInfo
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- CN202756655U CN202756655U CN201220413268.4U CN201220413268U CN202756655U CN 202756655 U CN202756655 U CN 202756655U CN 201220413268 U CN201220413268 U CN 201220413268U CN 202756655 U CN202756655 U CN 202756655U
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Abstract
The utility model relates to an ultra-low temperature ball valve which comprises a valve body, a valve seat assembly, a valve ball, a valve cover assembly and a valve rod assembly. The valve body, the valve cover assembly and the valve seat assembly are assembled to form a valve cavity, and the valve ball is positioned in the valve cavity. The ultra-low temperature ball valve is characterized in that a unidirectional through structure pointing from an inner cavity of the valve ball to the outside of the valve ball is arranged on the valve ball, and a channel hole for communicating the inner cavity of the valve ball and the valve cavity is further positioned on the valve ball. The unidirectional through structure and the channel hole can guarantee that the ball valve is good in sealing even if pressure from the outside of the valve cavity is very low. When pressure in the valve cavity exceeds a certain value, a sealing ball is pushed away, and pressure is released. Under low temperature and ultra-low temperature situations, the valve body cannot be damaged due to the fact that temperature increases abnormally to enable pressure of the valve cavity to increase abruptly, and the purpose of pressure release and explosion prevention are achieved. In addition, an upstream valve seat and a downstream valve seat are respectively of a ball front sealing structure and a ball rear sealing structure, the valve can achieve the sealing effect of two valve seats, sealing reliability of the valve is guaranteed, and the service life of the valve is prolonged.
Description
Technical field
The utility model relates to the ball valve technical field, and is particularly a kind of reliable in ultralow-temperature operation conditions lower seal performance, the ultra-low temperature ball valve of safety anti-explosive, long service life.
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 the LNG energy demand, the application of Subzero valve and Cryogenic valve is also more and more wider.
Because in the situation that ultralow temperature, the pressure of valve pocket and the pressure of pipeline are difficult to be consistent, Cryogenic valve will occur like this in valve pocket because pressure anomaly fluctuates or the temperature anomaly rising produces liquid gasification, thus the danger of blasting.In addition, if with medium discharged to valve downstream, be easy to cause danger, this just needs a kind of when valve pocket boosts unusually, valve can with the pressure in the valve pocket discharged to upstream line, can guarantee again the valve of valve normal turn-off.Mention in 4.6 of British standard(BS) BS 6364 that " because thermal expansion or liquid evaporation, the valve pocket internal pressure can increase, so Cryogenic valve should be designed to release and is higher than the pressure of nominal pressure." in the 5.5.1 of GB/T 24925 bar, mention in addition and " should take to prevent the measure of unusually boosting in the valve body for importing and exporting Cryogenic valve that side all can seal, decompression hole, buck channel can be set or take other pressure release mode.For ball valve, loaded by spring from pressure release valve seat and valve component initial sealing.Elastic material make from the pressure release valve seat, valve seat should have metal spring behind, unless manufacturing firm can under the design temperature of valve, discharge by type approval test proof in pressure, particularly when the minimum design temperature of valve.If the user is without specific (special) requirements, then pressure release mode is determined by manufactory." at present, common ultra-low temperature ball valve generally the material of valve is made into can low temperature resistant industrial and mineral material, its structural type also just simply lengthens neck, what have makes a call to a hole for pressure release at valve ball, what have does not then have a pressure relief.For the Cryogenic valve that does not have pressure relief, when the temperature anomaly fluctuation, valve pocket and the gasification of valve gap place cryogenic gas very easily have an accident.For just making a call to the structure that a hole is used for pressure release at valve ball, then valve can only have a valve seat to seal, and valve can only be sealed by the valve seat of back like this, and the valve seat of front can not seal.In the higher device of safety requirement, the double-piston effect valve that generally adopts two valve seats to seal, and such structure just can't satisfy the design of double-piston effect valve.Along with the raising that people look like safely, the at present requirement of the safety of Cryogenic valve and performance is also more and more higher, and this just needs a kind of ultralow-temperature operation conditions lower seal performance reliable, and the life-span is long, safety anti-explosive, the high-performance ultra-low temperature ball valve that cost is low.
Summary of the invention
The utility model provides the ultra-low temperature ball valve of a kind of, safety anti-explosive reliable in ultralow-temperature operation conditions lower seal performance, long service life for solving the technical problem that exists in the known technology.
The technological scheme that the utility model is taked for the technical problem that exists in the solution known technology is:
A kind of ultra-low temperature ball valve, comprise valve body, valve component, valve ball, bonnet assemblies and valve rod assembly, form valve pocket after valve body, bonnet assemblies and the valve component assembling, valve ball is installed in the valve pocket, it is characterized in that: described valve ball is provided with the one-way conduction structure, and the conducting direction of described one-way conduction structure is pointed to outside the valve ball by the valve ball inner chamber; Also be provided with the port hole that is communicated with valve ball inner chamber and valve pocket on the described valve ball.
The technological scheme that the utility model can also be taked is:
Described one-way conduction structure comprises pedestal, be provided with the first ladder hole in the described pedestal, in the hole, large footpath of the first ladder hole, the bearing of ball sealer, press seal ball and the spring of compressing support are installed successively from inside to outside, described bearing is provided with flow channels, and the large footpath nose end of described pedestal is shaped with the in-flanges of holddown spring; Described valve ball is provided with the mounting hole that matches with pedestal, and described pedestal is packed in the mounting hole.
Be equipped with tapered tread on the outer surface of described pedestal, be equipped with the female cone screw thread that matches on the described mounting hole, described pedestal is connected by tapered tread with valve ball.
Described one-way conduction structure comprises the second ladder hole that is located on the valve ball, in the hole, large footpath of the second ladder hole, the bearing of ball sealer, press seal ball and the spring of compressing support are installed successively from inside to outside, be fixed with the gland of holddown spring at the large footpath of the second ladder hole nose end, described bearing is provided with flow channels, and described gland is provided with flowing hole.
Described flow channels is made of the fluting that is located at the central through bore on the bearing and connects central through bore, and described fluting is located at the end that bearing contacts with ball sealer.
Position and the valve rod of described port hole on valve ball aligns.
Advantage and the good effect that the utlity model has are:
The utility model is by being located at the one-way conduction structure and the port hole that is connected valve ball inner chamber and valve pocket on the valve ball, guarantee on the one hand from valve ball C to pressure (being the pressure outside the valve pocket) even in very low situation, the one-way conduction structure is not opened yet, and makes valve have good sealing.On the other hand when from valve ball D to pressure (being the pressure in the valve pocket) when surpassing certain value, ball sealer is open, outside the fluid expulsion valve ball, pressure is laid down.Thereby avoided valve in low temperature and ultralow temperature situation, owing to the raise unexpected rising of the valve pocket pressure cause of temperature anomaly causes valve body to damage, reached safety relief, explosion-proof purpose.Since valve body at C to sealing, D is to pressure release, so the upstream valve seat of valve can adopt the front sealing configuration of ball, the downstream valve seat then can adopt sealing configuration behind the ball, make valve reach the effect of two valve base sealings, when a valve seat damage, another valve seat still can play the effect of sealing, the sealing that guarantees valve is reliable, has prolonged the working life of valve.
Description of drawings
Fig. 1 structural representation of the present utility model;
Fig. 2 is the structural representation of one-way conduction structure the first mode of execution among Fig. 1;
Fig. 3 is the A place partial enlarged drawing of Fig. 2;
Fig. 4 is the decomposing schematic representation of Fig. 2.
Fig. 5 is the structural representation of one-way conduction structure the second mode of execution among Fig. 1;
Fig. 6 is the B place partial enlarged drawing of Fig. 5.
Among the figure: 1, valve body; 2, valve component; 3, valve ball; 3-1, port hole; 3-2, mounting hole; 3-3, the second ladder hole; 4, bonnet assemblies; 5, valve rod assembly; 6, valve pocket; 7, one-way conduction structure; 7-1, pedestal; 7-1-1, the first ladder hole; 7-1-2, in-flanges; 7-2, ball sealer; 7-3, bearing; 7-3-1, central through bore; 7-3-2, fluting; 7-4, spring; 7-5, gland; 7-5-1, flowing hole.
Embodiment
For further understanding summary of the invention of the present utility model, Characteristic, hereby exemplify following examples, and cooperate accompanying drawing to be described in detail as follows:
See also Fig. 1-6, a kind of ultra-low temperature ball valve comprises valve body 1, valve component 2, valve ball 3, bonnet assemblies 4 and valve rod assembly 5, forms valve pocket 6 after valve body, bonnet assemblies and the valve component assembling, and valve ball is installed in the valve pocket.Described valve ball is provided with one-way conduction structure 7, and the conducting direction of described one-way conduction structure is pointed to outside the valve ball by the valve ball inner chamber; Also be provided with the port hole 3-1 that is communicated with valve ball inner chamber and valve pocket on the described valve ball.Concrete, when the pressure in the valve pocket surpassed certain value, fluid entered into the valve ball inner chamber through port hole, and under pressure, the one-way conduction structure is opened and is carried out pressure release, and after the pressure release, the one-way conduction structure is closed.
In the technique scheme: the one-way conduction structure further can adopt following two kinds of structures:
The first structure:
Comprise pedestal 7-1, be provided with the first ladder hole 7-1-1 in the described pedestal, in the hole, large footpath of the first ladder hole, the bearing 7-3 of ball sealer 7-2, press seal ball and the spring 7-4 of compressing support are installed successively by inner outside mutually, described bearing is provided with flow channels, and the large footpath nose end of described pedestal is shaped with the in-flanges 7-1-2 of holddown spring.Described valve ball is provided with the mounting hole 3-2 that matches with pedestal, and described pedestal is packed in the mounting hole.Concrete, the installation process of this one-way conduction structure is: in the large aperture of the pedestal of at first ball sealer, bearing and spring being packed into successively, then pass through hemmer, make the large footpath bore ends of pedestal form inside flange, the end of this flange holddown spring, ball sealer, bearing and spring are encapsulated in the pedestal, above-mentioned package assembly are packed in form the one-way conduction structure in the mounting hole of valve ball at last.Above-mentioned one-way conduction structure will guarantee the sealing that pedestal cooperates with mounting hole when assembling, can adopt the mode that adds sealing gasket.In the utility model, further be equipped with tapered tread on the outer surface of described pedestal, be equipped with the female cone screw thread that matches on the described mounting hole, described pedestal is connected by tapered tread with valve ball.The taper direction of tapered tread is by pointing to outside the valve ball in the valve ball.Adopt this taper direction, behind said base, ball sealer, bearing and the spring assembling, operator change to be needed by the valve ball cavity above-mentioned package assembly to be introduced, and then from inside to outside package assembly is installed in the mounting hole of valve ball.
The second structure:
Comprise the second ladder hole 3-3 that is located on the valve ball, the bearing 7-3 of ball sealer 7-2, press seal ball and the spring 7-3 of compressing support are installed in the hole, large footpath of the second ladder hole from inside to outside successively, the large footpath nose end of described the second ladder hole is fixed with the gland 7-5 of holddown spring, described bearing is provided with flow channels, and described gland is provided with flowing hole 7-5-1.This one-way conduction structure has been saved pedestal than the first one-way conduction structure, ball sealer, bearing and spring are directly installed on the valve ball, but because valve ball forms relatively difficulty of inside flange, easily damage valve ball, the described corresponding gland that increased is used for holddown spring.This one-way conduction structure has been simplified installation than above-mentioned the first one-way conduction structure, only need install in the valve ball outside to get final product.
In above-mentioned two kinds of mode of executions: the flow channels that is located on the bearing is used for when pressure release, with fluid expulsion.This flow channels can adopt and be located on the bearing submarginal a plurality of through holes and realize.In the utility model, described flow channels preferably is made of the fluting 7-3-2 that is located at the central through bore 7-3-1 on the bearing and connects central through bore, and described fluting is located at the end that bearing contacts with ball sealer.Adopt this flow channels structure, when ball sealer was opened, fluid entered from the edge of fluting, flow through in central through bore, then discharged from its port.
In the technique scheme: the port hole that is located on the valve ball is guaranteeing that its position and quantity on valve ball can arrange arbitrarily under valve pocket and the state that the ball valve inner chamber is communicated with.In the utility model, location optimization and the valve rod of described port hole on valve ball aligns, referring to accompanying drawing.Adopt above-mentioned position, a port hole only need be set, just can guarantee that the valve ball inner chamber is communicated with simultaneously with the valve pocket of both sides and the valve pocket of stem position, thereby simplify the structure, reduced processing cost.
Claims (7)
1. ultra-low temperature ball valve, comprise valve body, valve component, valve ball, bonnet assemblies and valve rod assembly, form valve pocket after valve body, bonnet assemblies and the valve component assembling, valve ball is installed in the valve pocket, it is characterized in that: described valve ball is provided with the one-way conduction structure, and the conducting direction of described one-way conduction structure is pointed to outside the valve ball by the valve ball inner chamber; Also be provided with the port hole that is communicated with valve ball inner chamber and valve pocket on the described valve ball.
2. ultra-low temperature ball valve according to claim 1, it is characterized in that: described one-way conduction structure comprises pedestal, be provided with the first ladder hole in the described pedestal, in the hole, large footpath of the first ladder hole, the bearing of ball sealer, press seal ball and the spring of compressing support are installed successively from inside to outside, described bearing is provided with flow channels, and the large footpath nose end of described pedestal is shaped with the in-flanges of holddown spring; Described valve ball is provided with the mounting hole that matches with pedestal, and described pedestal is packed in the mounting hole.
3. ultra-low temperature ball valve according to claim 2, it is characterized in that: be equipped with tapered tread on the outer surface of described pedestal, be equipped with the female cone screw thread that matches on the described mounting hole, described pedestal is connected by tapered tread with valve ball.
4. ultra-low temperature ball valve according to claim 1, it is characterized in that: described one-way conduction structure comprises the second ladder hole that is located on the valve ball, in the hole, large footpath of the second ladder hole, the bearing of ball sealer, press seal ball and the spring of compressing support are installed successively from inside to outside, be fixed with the gland of holddown spring at the large footpath of the second ladder hole nose end, described bearing is provided with flow channels, and described gland is provided with flowing hole.
5. arbitrary described ultra-low temperature ball valve according to claim 2-4 is characterized in that: described flow channels is made of the fluting that is located at the central through bore on the bearing and connects central through bore, and described fluting is located at the end that bearing contacts with ball sealer.
6. ultra-low temperature ball valve according to claim 1, it is characterized in that: position and the valve rod of described port hole on valve ball aligns.
7. ultra-low temperature ball valve according to claim 5, it is characterized in that: position and the valve rod of described port hole on valve ball aligns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220413268.4U CN202756655U (en) | 2012-08-20 | 2012-08-20 | Ultra-low temperature ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220413268.4U CN202756655U (en) | 2012-08-20 | 2012-08-20 | Ultra-low temperature ball valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202756655U true CN202756655U (en) | 2013-02-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220413268.4U Expired - Lifetime CN202756655U (en) | 2012-08-20 | 2012-08-20 | Ultra-low temperature ball valve |
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| Country | Link |
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| CN (1) | CN202756655U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102829212A (en) * | 2012-08-20 | 2012-12-19 | 天津祥嘉流体控制系统有限公司 | Ultra-low temperature ball valve |
| CN104989841A (en) * | 2015-07-22 | 2015-10-21 | 雷蒙德(北京)科技股份有限公司 | High-temperature metal hard sealing floating ball valve |
| CN107731586A (en) * | 2017-10-16 | 2018-02-23 | 镇江市南方工矿器材有限公司 | A kind of explosion-proof electric apparatus switch |
| WO2021240494A1 (en) * | 2020-05-27 | 2021-12-02 | Habonim Industrial Valves & Actuators Ltd. | Bi-flow cryogenic firesafe floating ball valve |
-
2012
- 2012-08-20 CN CN201220413268.4U patent/CN202756655U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102829212A (en) * | 2012-08-20 | 2012-12-19 | 天津祥嘉流体控制系统有限公司 | Ultra-low temperature ball valve |
| CN104989841A (en) * | 2015-07-22 | 2015-10-21 | 雷蒙德(北京)科技股份有限公司 | High-temperature metal hard sealing floating ball valve |
| CN107731586A (en) * | 2017-10-16 | 2018-02-23 | 镇江市南方工矿器材有限公司 | A kind of explosion-proof electric apparatus switch |
| WO2021240494A1 (en) * | 2020-05-27 | 2021-12-02 | Habonim Industrial Valves & Actuators Ltd. | Bi-flow cryogenic firesafe floating ball valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130227 |