CN203146894U - Ball valve - Google Patents
Ball valve Download PDFInfo
- Publication number
- CN203146894U CN203146894U CN 201320149086 CN201320149086U CN203146894U CN 203146894 U CN203146894 U CN 203146894U CN 201320149086 CN201320149086 CN 201320149086 CN 201320149086 U CN201320149086 U CN 201320149086U CN 203146894 U CN203146894 U CN 203146894U
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- valve
- valve rod
- ball
- rod
- ball valve
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Abstract
The utility model provides a ball valve. The ball valve comprises a valve body, a valve seat, an opening-and-closing part, a valve rod and a tray, wherein the valve body comprises a first fluid channel, the valve seat is arranged inside the valve body, and is provided with a valve port communicated with the first fluid channel, the opening-and-closing part is arranged inside the valve body and is arranged matched with the valve seat, the valve rod comprises a shaft shoulder, and a first end of the valve rod penetrates through the valve body and is connected with the opening-and-closing part. The valve rod controls the valve port of the valve seat to be opened or closed by controlling the opening-and-closing part. The tray is sleeved on the valve rod, is arranged on one side, far away from the opening-and-closing part, of the shaft shoulder, and is fixedly connected with the valve body. The ball valve further comprises an abrasion-proof structure which is arranged between the shaft shoulder of the valve rod and the tray. According to the ball valve, the phenomenon of leakage caused by abrasion between the valve rod and the shaft shoulder when the ball valve is in a closed state or the phenomenon of separation between the valve rod and the opening-and-closing part can be effectively prevented from happening.
Description
Technical field
The utility model relates to valve field, in particular to a kind of ball valve.
Background technique
In high temperature, high pressure, high circulation, thermal shock with wash away etc. in the pipeline in the various systems such as fired power generating unit under the harsh working condition, petroleum refining, chemical industry, metallurgy, ball valve is connection, unlatching, the shutoff device that arrives commonly used.Since high temperature, high pressure, high circulation, thermal shock and wash away and medium in contain under the harsh operating mode such as a large amount of hydrogen and work, so just strict especially to the technical requirements of such ball valve.The ball valve that uses in the High Temperature High Pressure system very easily is subjected to abominable situation influence, as the leakage at the improper easier initiation ball valve sealing of fruit structure place.Under some abominable operating conditions, inner open-shut device can take place blow out and valve rod accident such as scurry out, thereby cause the damage of equipment and operator's hazard to person.
Scurry out for preventing valve rod, the tray structures that adopt in the prior art more, because in long-term using process, valve opening and close frequent movement, because the rotation of valve rod can cause wearing and tearing between pallet and the valve rod shaft shoulder, axial float easily takes place with respect to pallet in valve rod, easily makes the open-shut device rotation not in place, leak thereby cause the sealing surface of open-shut device and valve base sealing sternly not to cause under the ball valve closed condition, even cause valve rod and open-shut device to break away from.
The model utility content
The utility model aims to provide a kind of ball valve, to reduce the wearing and tearing between pallet and the valve rod shaft shoulder when valve rod rotates, breaks away from thereby leakage or valve rod and open-shut device take place under the ball valve closed condition that prevents from causing because of these wearing and tearing.
To achieve these goals, the utility model provides a kind of ball valve, comprising: valve body comprises the first fluid passage; Valve seat is arranged at valve inner, and valve seat has the valve port with the first fluid channel connection; Open-shut device is positioned at valve inner and is equipped with valve seat; Valve rod comprises the shaft shoulder, and first end of valve rod passes valve body and is connected with open-shut device, and valve rod opens or closes by the valve port of operation open-shut device control valve seat; Pallet is sheathed on valve rod, is positioned at fixedlying connected away from a side of open-shut device and with valve body of the shaft shoulder; Ball valve also comprises anti-wear structure, and anti-wear structure is arranged between the shaft shoulder and pallet of valve rod.
Further, anti-wear structure comprises the bearing that is arranged between pallet and the valve rod.
Further, anti-wear structure comprises thrust ball bearing, and first bearing surface of thrust ball bearing is supported on the shaft shoulder, and tray support is in second bearing surface of thrust ball bearing.
Further, ball valve also comprises: stuffing box packing; Gland, Gland are sheathed on valve rod and stuffing box packing are pressed between valve body and the valve rod; Wherein, at least one in valve rod and the Gland has the surface treatment wearing layer.
Further, ball valve also comprises: valve gap, be covered on the valve body, and valve gap comprises second fluid passage, open-shut device is arranged between the valve port and second fluid passage of valve seat; The valve seal ring, the gap between sealed valve body and the valve gap, the valve seal ring has the surface treatment wearing layer.
Further, Gland is connected with valve body with first nut by double-screw bolt, and ball valve also comprises belleville spring, and belleville spring is sheathed on the double-screw bolt and between Gland and first nut.
Further, ball valve also comprises handle and the anti-attrition pad that is connected with valve rod, the anti-attrition pad is sheathed on the valve rod and is positioned at the groove of second end, one side surface of the close valve rod of pallet, the respective surfaces of the outstanding pallet of anti-attrition pad and with the handle butt, the anti-attrition pad has the surface treatment wearing layer.
Further, the surface treatment wearing layer is salt bath compounding layer.
Use the technical solution of the utility model, because ball valve has the shaft shoulder that is arranged at valve rod and the anti-wear structure between the pallet, in valve opening and pass closed procedure, this anti-wear structure can reduce the wearing and tearing between the shaft shoulder of pallet and valve rod, valve rod is with respect to the difficult generation of pallet axial float, thereby generation leakage or valve rod and open-shut device disengaging under the ball valve closed condition that can effectively prevent from causing because of these wearing and tearing.
Description of drawings
The Figure of description that constitutes the application's a part is used to provide further understanding of the present utility model, and illustrative examples of the present utility model and explanation thereof are used for explaining the utility model, do not constitute improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 shows the sectional view according to the utility model embodiment's ball valve plan view;
Fig. 2 shows the plan view according to the utility model embodiment's ball valve.
Embodiment
Need to prove that under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.Describe the utility model below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
As shown in Figure 1, the ball valve of present embodiment comprises valve body 1, open-shut device 2, valve seat 3, valve rod 4, pallet 5, is arranged at the anti-wear structure 6 between valve rod 4 and the pallet 5.
Valve rod 4 is provided with the shaft shoulder 41, and pallet 5 is sheathed on the valve rod 4 and with valve body 1 fixedlys connected by the screw 15 that is installed in the column 14.Anti-wear structure 6 preferably includes bearing.In the present embodiment, anti-wear structure 6 is thrust ball bearing 61, and first bearing surface of thrust ball bearing is supported on the shaft shoulder 41, and pallet 5 is supported in second bearing surface of thrust ball bearing.Bearing 61 wear resistancies are good, can reduce the wearing and tearing between the shaft shoulder 41 of pallet 5 and valve rod 4.
Valve body 1 is provided with the first fluid passage.It is inner and have a valve port with the first fluid channel connection that valve seat 3 is arranged at valve body 1.Open-shut device 2 is positioned at valve body 1 inside and is equipped with valve seat 3.First end of valve rod 4 passes valve body 1 and is connected with open-shut device 2, and valve rod 4 opens or closes by the valve port of operation open-shut device 2 control valve seats 3, thus the opening and closing of control ball valve.Open-shut device is the spheroid with central fluid passage in the present embodiment.
In the present embodiment, ball valve also comprises the seating spring 20 that is arranged on valve body 1 inside.Seating spring 20 comprises the through hole that is communicated with first fluid passage and valve port between valve body 1 and valve seat 3.The effect of seating spring 20 is to make between spheroid and the valve seat 3 to cooperate closely.
As depicted in figs. 1 and 2, ball valve also comprises stuffing box packing 9, Gland 10, belleville spring 11, double-screw bolt 13, first nut 12, is covered on valve gap 7 on the valve body 1, is used for the valve seal ring 8 in gap between sealed valve body 1 and the valve gap 7.Wherein, valve gap 7 comprises second fluid passage.Open-shut device 2 is arranged between the valve port and second fluid passage of valve seat.In the present embodiment, Gland 10 is sheathed on the valve rod 4 and with stuffing box packing 9 and is pressed between valve body 1 and the valve rod 4.Gland 10 is fixed on the valve body 1 by the cooperation between belleville spring 11, double-screw bolt 13 and first nut 12.Owing to have elastic force during belleville spring 11 distortion, thereby sustainable stuffing box packing 9, the above-mentioned function that can realize gap between sealed valve body 1 and the valve rod 4 better that arranges of compressing itself.
Second end of valve rod 4 passes pallet 5 backs by pad 18 and second nut, 19 fixedly connected handles 16.
As shown in Figure 1, in the present embodiment, ball valve also comprises anti-attrition pad 17.Anti-attrition pad 17 is sheathed on the valve rod 4 and is positioned at pallet 5 near the groove of second end, one side surface of valve rods 4, the respective surfaces of anti-attrition pad 17 outstanding pallets 5 and with handle 16 butts.
As shown in Figure 1, be communicated with second fluid passage of valve gap 7 and in line the time, ball valve is in complete opening state when the first fluid passage of the valve port of the central fluid passage of spheroid, valve seat 3 and valve body 1; Rotatable handle 16 actuatable valve bars 4 rotate, and by valve rod 4 control spheroid half-twists, at this moment, the sealing surface of spheroid contacts with valve gap 7 with valve seat 3 respectively behind 90 ° of the rotatable handles, and ball valve is in closed condition.
In the present embodiment, valve rod 4, Gland 10, valve seal ring 8 and anti-attrition pad 17 have the surface treatment wearing layer.Preferably, the surface treatment wearing layer is compound (Quench-Polish-Quench, QPQ) processing layer of salt bath.Valve rod 4, Gland 10, valve seal ring 8 with salt bath compounding layer have strengthened wear resistance and corrosion resistance, in high temperature, high pressure, high circulation, thermal shock with wash away etc. under the harsh operating mode, have guaranteed the zero leakage of valve.And behind the anti-attrition pad 17 increase salt bath compounding layers, strengthen wear resistance, can further reduce the wearing and tearing between pallet 5 and the handle 16.
As can be seen from the above description, embodiment of the present utility model has realized following technique effect: owing to be provided with thrust ball bearing between valve rod 4 and the pallet 5, wear resistance is good, in valve opening and pass closed procedure, can effectively prevent the wearing and tearing between pallet 5 and valve rod 4 shaft shoulders 41, valve rod 4 is difficult for taking place axial float with respect to pallet 5, when ball valve is closed behind the rotatable handle 16, thereby valve rod 4 rotates drive open-shut device 2 and rotates to the appropriate location, the sealing surface of open-shut device 2 is accurately cooperated with valve seat, sealing is tight, thereby can prevent the ball valve leakage.
The above is preferred embodiment of the present utility model only, is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (8)
1. ball valve comprises:
Valve body (1) comprises the first fluid passage;
Valve seat (3) is arranged at described valve body (1) inside, and described valve seat (3) has the valve port with described first fluid channel connection;
Open-shut device (2), it is inner and be equipped with described valve seat (3) to be positioned at described valve body (1);
Valve rod (4) comprises the shaft shoulder (41), and first end of described valve rod (4) passes described valve body (1) and is connected with described open-shut device (2), and the described valve port that described valve rod (4) is controlled described valve seat (3) by the described open-shut device of operation (2) opens or closes;
Pallet (5) is sheathed on described valve rod (4), is positioned at fixedlying connected away from a side of described open-shut device (2) and with described valve body (1) of the described shaft shoulder (41);
It is characterized in that,
Described ball valve also comprises anti-wear structure (6), and described anti-wear structure (6) is arranged between the shaft shoulder (41) and described pallet (5) of described valve rod (4).
2. ball valve according to claim 1 is characterized in that, described anti-wear structure (6) comprises the bearing that is arranged between described pallet (5) and the described valve rod (4).
3. ball valve according to claim 2, it is characterized in that, described anti-wear structure (6) comprises thrust ball bearing, and first bearing surface of described thrust ball bearing is supported on the described shaft shoulder (41), and described pallet (5) is supported in second bearing surface of described thrust ball bearing.
4. ball valve according to claim 1 is characterized in that, described ball valve also comprises:
Stuffing box packing (9);
Gland (10), described Gland (10) are sheathed on described valve rod (4) and described stuffing box packing (9) are pressed between described valve body (1) and the described valve rod (4);
Wherein, at least one in described valve rod (4) and the described Gland (10) has the surface treatment wearing layer.
5. ball valve according to claim 1 is characterized in that, described ball valve also comprises:
Valve gap (7) is covered on the described valve body (1), and described valve gap comprises second fluid passage, and described open-shut device (2) is arranged between the valve port and described second fluid passage of described valve seat (3);
Valve seal ring (8) seals the gap between described valve body (1) and the described valve gap (7), and described valve seal ring (8) has the surface treatment wearing layer.
6. ball valve according to claim 4, it is characterized in that, described Gland (10) is connected with described valve body (1) with first nut (12) by double-screw bolt (13), described ball valve also comprises belleville spring (11), and described belleville spring (11) is sheathed on described double-screw bolt (13) upward and is positioned between described Gland (10) and described first nut (12).
7. ball valve according to claim 1, it is characterized in that, described ball valve also comprises handle (16) and the anti-attrition pad (17) that is connected with described valve rod (4), described anti-attrition pad (17) is sheathed on the groove of second end, one side surface that the close described valve rod (4) of described pallet (5) was gone up and be positioned to described valve rod (4), the respective surfaces of the outstanding described pallet (5) of described anti-attrition pad (17) and with described handle (16) butt, described anti-attrition pad (17) has the surface treatment wearing layer.
8. according to each described ball valve in the claim 4 to 7, it is characterized in that described surface treatment wearing layer is salt bath compounding layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320149086 CN203146894U (en) | 2013-03-28 | 2013-03-28 | Ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320149086 CN203146894U (en) | 2013-03-28 | 2013-03-28 | Ball valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203146894U true CN203146894U (en) | 2013-08-21 |
Family
ID=48974418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320149086 Expired - Lifetime CN203146894U (en) | 2013-03-28 | 2013-03-28 | Ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203146894U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110206896A (en) * | 2019-06-14 | 2019-09-06 | 刘艳文 | A kind of shut-off valve |
-
2013
- 2013-03-28 CN CN 201320149086 patent/CN203146894U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110206896A (en) * | 2019-06-14 | 2019-09-06 | 刘艳文 | A kind of shut-off 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: 20130821 |