CN202228692U - Needle valve - Google Patents
Needle valve Download PDFInfo
- Publication number
- CN202228692U CN202228692U CN2011203602404U CN201120360240U CN202228692U CN 202228692 U CN202228692 U CN 202228692U CN 2011203602404 U CN2011203602404 U CN 2011203602404U CN 201120360240 U CN201120360240 U CN 201120360240U CN 202228692 U CN202228692 U CN 202228692U
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- CN
- China
- Prior art keywords
- valve
- valve seat
- needle
- thrust step
- sleeve
- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses a needle valve, which comprises a valve body. A valve cavity is arranged in the valve body, a valve rod is movably arranged in the valve cavity, seal fillers and a pressing structure for pressing and fixing the seal fillers are arranged in the valve cavity and between the valve body and the valve rod, and a needle-shaped valve core is arranged at the lower portion of the valve rod. A thrust step is arranged on the inner wall surface of the valve cavity and below the needle-shaped valve core and is provided with a thrust step surface, a valve seat is arranged on the thrust step surface in a sitting mode and is pressed and fixed on the thrust step surface through the pressing structure for pressing and fixing the seal fillers, and a seal structure is arranged between the valve seat and the thrust step. A communication hole for communicating a fluid inlet and a fluid outlet is arranged on the valve seat, and the upper end of the communication hole is provided with a seal hole opening for being in seal match with the conical surface corresponding to the needle-shaped valve core. After a period of time in use, when the seal position on the valve seat corresponding to the needle-shaped valve core is damaged, a user can open a valve cover and fetch the valve seat for replacement, and then task for maintenance replacement is finished.
Description
Technical field
The utility model belongs to the control valve technical field, is specifically related to a kind of needle-valve.
Background technique
The spool of existing needle-valve as flow control valve is an aciculiform, and valve seat adopts soft materials such as tin, copper to process more, and the aciculiform spool is corresponding with valve seat to be sealed and matched to close needle-valve; Through valve rod spool is pressed on the valve seat; Rely on the conical surface to closely cooperate and reach the sealing of aciculiform spool and valve base chamber, when needs are opened needle-valve, operating valve lever; Valve rod drives the aciculiform spool and valve seat is separated, and can realize the needle-valve unlatching.
The valve body of existing needle-valve is provided with fluid inlet and fluid output; In valve body, be provided with the valve pocket that is used for communication of fluid import and fluid output; The guide direction of cigarette above-below direction moves and is equipped with valve rod in valve pocket, and stem lower portion has an aciculiform spool, in valve pocket, below the aciculiform spool, is provided be sealed and matched to close the valve seat of needle-valve corresponding with the aciculiform spool; Top at valve rod is provided with handwheel; Rotate handwheel, valve rod moves up and down along valve pocket, and the aciculiform spool is corresponding with valve seat to be sealed and matched or to break away from closing or opening with the realization needle-valve.
Mostly the valve seat of existing needle-valve is to be fixedly connected on the valve pocket internal face of valve body with Type of Welding, and along with the repeatedly opening and closing of needle-valve, wearing and tearing will appear in aciculiform spool and valve seat, influence both conical surface seal effects, needs to change.But because valve seat is to be connected and fixed on valve body with on-disconnectable, when damaging appears in valve seat, be not easy to change, safeguard cumbersomely, influence the normal use of needle-valve.
The model utility content
The purpose of the utility model is to provide a kind of simple in structure, easily changeable needle-valve of valve seat, to solve the technical problem that is difficult for replacing when the valve seat appearance damages in the existing technology and influences the normal use of needle-valve.
For realizing above-mentioned purpose, the utility model adopts following technological scheme: a kind of needle-valve comprises valve body; On valve body, be provided with fluid inlet and fluid output; Be provided with the valve pocket that is used to be communicated with said fluid inlet and fluid output in the valve body, along the vertical direction guide direction moves and is equipped with valve rod in valve pocket, between valve body and valve rod, is provided with stuffing box packing in the valve pocket and is used to be fixed the compressing structure of stuffing box packing; Stem lower portion has an aciculiform spool; Be provided with the thrust step in aciculiform spool below on the internal face of described valve pocket, the thrust step has thrust step surface upwards, and on the thrust step surface, sitting has valve seat; Valve seat is pressed abd fixed on the thrust step surface by the said compressing structure that is used to compress stuffing box packing; And between valve seat and thrust step, be provided with sealing configuration, described valve seat is provided with the opening that is used to be communicated with said fluid inlet and fluid output, has on the opening to be used for corresponding conical surface seal cooperation with the aciculiform spool to close the seal orifice of needle-valve.
Described compressing structure comprises the joint sleeve of scyewed joint on valve body; Joint sleeve is positioned at the valve seat top; In valve pocket, between joint sleeve and valve seat, be furnished with power transmission sleeve, compact heap and clamp sleeve from top to bottom successively, wherein, power transmission sleeve, compact heap and clamp sleeve all are sleeved on the valve rod; Described stuffing box packing is between compact heap and clamp sleeve, and the lower end roof pressure of clamp sleeve is on valve seat.
The lower end of described clamp sleeve has one and is used for the inserting step hole of valve seat at circumferential upper limit with valve seat is pegged graft and to be cooperated.
Described valve rod is made up of upper valve rod and lower valve rod, and last lower valve rod is fixedly connected through embracing cover.
Sealing configuration between described thrust step and the valve seat comprises the annular seal groove on the lower end surface that is arranged on valve seat, in annular seal groove, is equipped with seal ring.
The beneficial effect of the utility model is: in the needle-valve that the utility model provided, be provided with valve rod in the valve pocket, the bottom of valve rod is provided with the aciculiform spool; Below the aciculiform spool, be provided with the thrust step on the internal face of valve pocket, on the thrust step, sitting has valve seat, and valve seat is pressed abd fixed on the thrust step surface of thrust step through the compressing structure that is arranged in the valve pocket; During use; When valve rod drove seal orifice conical surface seal that the aciculiform spool is moved downward to opening on aciculiform spool and the valve seat and cooperates, the opening of valve seat was closed, and needle-valve is closed; When valve rod drives the aciculiform spool and is moved upward to aciculiform spool and valve seat and is separated; The opening of valve seat is opened, and fluid inlet and fluid output are communicated with, and needle-valve is opened.In use for some time, when corresponding sealing part with the aciculiform spool is damaged on the valve seat, open valve gap, valve seat is taken out change, accomplish the task of maintain and replace.Valve seat is pressed abd fixed on the thrust step surface by the compressing structure that is used to compress stuffing box packing with valve seat; Like this; Compressing structure is fixed stuffing box packing not to the utmost and is fixed valve seat simultaneously, has saved the trouble that designs compressing structure again, has improved the degree of utilizing of compressing structure.Adopt the needle-valve that is provided in the foregoing description, when damaging appears in sealing surface of seat, only need change valve seat and get final product, reduced maintenance cost.
Description of drawings
Fig. 1 is a kind of embodiment's of the needle-valve that provides of the utility model a structural representation;
Fig. 2 is an A place enlarged diagram among Fig. 1.
Embodiment
Like Fig. 1, shown in Figure 2, a kind of embodiment of needle-valve, the needle-valve that is provided among this embodiment comprises valve body 1; Valve body 1 is provided with fluid inlet and fluid output, is provided for the valve pocket 15 of communication of fluid import and fluid output on the valve body 1, is provided with valve gap 9 in the top of valve pocket 15 on the valve body 1; Along the vertical direction guide direction moves and is equipped with valve rod 10 in the valve pocket of valve body 1, and valve rod 10 is fixed together through embracing cover 7 by upper valve rod 101 and lower valve rod 102, has an aciculiform spool 14 in the bottom of valve rod 10; At the top of valve rod 10 handwheel 11 is installed; On valve rod 10, be set with a joint sleeve 9, this joint sleeve 9 connects with valve rod 10 through screw thread, and the outer circumferential face of joint sleeve 9 is provided with outside thread; The internal face of the valve pocket 15 of valve body be provided with joint sleeve on the internal thread of outside thread screw fit; Joint sleeve is through internal and external threads and valve body scyewed joint, and wherein, valve rod passes valve gap; The internal face of the perforation that the confession valve rod of offering on the valve gap passes is provided with the opposite internal thread of internal thread rotation direction on rotation direction and the valve pocket internal face, and valve gap is through internal thread and joint sleeve scyewed joint.Below aciculiform spool 14, be provided with thrust step 12 on the internal face of valve pocket 15; Thrust step 12 has thrust step surface upwards; On thrust step 12, sit and be useful on be sealed and matched with the valve seat 3 of closing needle-valve corresponding with the aciculiform spool; Be provided with sealing configuration between valve seat 3 and the thrust step 12, the sealing configuration here comprises the annular seal groove on the lower end surface that is arranged on valve seat, in annular seal groove, is equipped with seal ring 2; Valve seat 3 is provided with the opening 11 that is used to be communicated with said fluid inlet and fluid output; Opening 11 upper ends have and are used for corresponding conical surface seal with the aciculiform spool and cooperate to close the seal orifice of needle-valve, in valve pocket, between valve rod and valve body, are provided with stuffing box packing 5, in valve pocket 15, are provided with to be used for compressing structure that stuffing box packing is fixed; In the present embodiment; This compressing structure is made up of the joint sleeve 9, power transmission sleeve 6, compact heap 13 and the clamp sleeve 4 that are assemblied in successively from top to bottom in the valve pocket, wherein, and on the equal suit valve rod of described joint sleeve, power transmission sleeve, compact heap and clamp sleeve; And described stuffing box packing is between compact heap 13 and clamp sleeve 4; When assembling was accomplished, scyewed joint was pressed abd fixed on valve seat through power transmission sleeve, compact heap, stuffing box packing, clamp sleeve at the joint sleeve on the valve pocket inwall of valve body on the thrust step surface of thrust step of valve body, and the lower end of clamp sleeve 4 is pressed on the valve seat 3; Have one is used for the inserting step hole of valve seat at circumferential upper limit, the hole internal face of inserting step hole and the corresponding grafting inserting of the corresponding outer circumferential face of valve seat with valve seat is pegged graft and cooperated in the lower end of clamp sleeve.
During use, above-mentioned needle-valve correspondence is assemblied on the fluid circuit, the fluid inlet of valve body and fluid output corresponding and pipeline connection; Turn handwheel 11; Through the screw-thread fit between valve rod 10 and the joint sleeve 9, valve rod 10 moves up or down along the bearing of trend of valve pocket 15, when valve rod 10 drives aciculiform spools 14 and is moved downward to aciculiform spool and valve seat 3 and is sealed and matched; Needle-valve is closed; When valve rod drives the aciculiform spool and is moved upward to the aciculiform spool and is separated with valve seat, fluid inlet and fluid output connection, needle-valve unlatching.
In use for some time; When corresponding sealing part with the aciculiform spool is damaged on the valve seat; Open valve gap, and after valve rod, joint sleeve, power transmission sleeve, compact heap, stuffing box packing and clamp sleeve taken out from valve pocket, valve seat is taken out change; Again each parts is assembled successively, accomplish the task of maintain and replace.Adopt the needle-valve that is provided in the foregoing description, when damaging appears in sealing surface of seat, only need change valve seat and get final product, reduced maintenance cost.
In the above-described embodiments, the sealing configuration between valve seat and the thrust step comprises the annular seal groove on the lower end surface that is arranged on valve seat, in annular seal groove, is equipped with seal ring.In other embodiments; Can annular seal groove be arranged on the thrust step surface of thrust step, and in the sealing groove, seal ring be installed, at this moment; Because valve seat is pressed on the thrust step surface of thrust step by the sleeve that is assemblied in the valve pocket; So can play sealing effect equally, can also sealing configuration be arranged on the outer circumferential face of valve seat or be arranged on the connecting passage, can play seal action equally.
In the above-described embodiments; Compressing structure is made up of valve body, joint sleeve, power transmission sleeve, positioning block, stuffing box packing and clamp sleeve; In other embodiments, compressing structure also can adopt other forms, as saves power transmission sleeve, positioning block; And joint sleeve is extended downward stuffing box packing place, form compressing structure by joint sleeve, stuffing box packing, clamp sleeve.Joint sleeve is extended downward the valve seat place; Directly valve seat is pressed on the thrust step by scyewed joint at the joint sleeve on the valve pocket internal face; At this moment, can with stuffing box packing be arranged between valve rod and the joint sleeve and between joint sleeve and the valve pocket to reach sealing effect.
In the foregoing description, valve rod is designed to the branch body structure that is fixedly connected by upper valve rod and lower valve rod, when long-distance transport, can valve rod be split into two sections like this, be convenient to transportation, be convenient to the maintenance assembling simultaneously.Certainly, in other embodiments, also can valve rod be designed to integrative-structure, not influence the normal unlatching of needle-valve and close and get final product.
Claims (5)
1. needle-valve; Comprise valve body, on valve body, be provided with fluid inlet and fluid output, be provided with the valve pocket that is used to be communicated with said fluid inlet and fluid output in the valve body; Along the vertical direction guide direction moves and is equipped with valve rod in valve pocket; Between valve body and valve rod, be provided with stuffing box packing in the valve pocket and be used to be fixed the compressing structure of stuffing box packing, stem lower portion has an aciculiform spool, it is characterized in that: be provided with the thrust step in aciculiform spool below on the internal face of described valve pocket; The thrust step has thrust step surface upwards; On the thrust step surface, sitting has valve seat, and valve seat is pressed abd fixed on the thrust step surface by the said compressing structure that is used to compress stuffing box packing, and between valve seat and thrust step, is provided with sealing configuration; Described valve seat is provided with the opening that is used to be communicated with said fluid inlet and fluid output, has on the opening to be used for corresponding conical surface seal cooperation with the aciculiform spool to close the seal orifice of needle-valve.
2. needle-valve according to claim 1; It is characterized in that: described compressing structure comprises the joint sleeve of scyewed joint on valve body, and joint sleeve is positioned at the valve seat top, in valve pocket, between joint sleeve and valve seat, is furnished with power transmission sleeve, compact heap and clamp sleeve from top to bottom successively; Wherein, Power transmission sleeve, compact heap and clamp sleeve all are sleeved on the valve rod, and described stuffing box packing is between compact heap and clamp sleeve, and the lower end roof pressure of clamp sleeve is on valve seat.
3. needle-valve according to claim 2 is characterized in that: the lower end of described clamp sleeve has one and is used for the inserting step hole of valve seat at circumferential upper limit with valve seat is pegged graft and to be cooperated.
4. needle-valve according to claim 1 is characterized in that: described valve rod is made up of upper valve rod and lower valve rod, and last lower valve rod is fixedly connected through embracing cover.
5. needle-valve according to claim 1 is characterized in that: the sealing configuration between described thrust step and the valve seat comprises the annular seal groove on the lower end surface that is arranged on valve seat, in annular seal groove, is equipped with seal ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203602404U CN202228692U (en) | 2011-09-23 | 2011-09-23 | Needle valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203602404U CN202228692U (en) | 2011-09-23 | 2011-09-23 | Needle valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202228692U true CN202228692U (en) | 2012-05-23 |
Family
ID=46079278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203602404U Expired - Fee Related CN202228692U (en) | 2011-09-23 | 2011-09-23 | Needle valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202228692U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102937189A (en) * | 2012-11-16 | 2013-02-20 | 镇江市华阳机电制造有限公司 | Needle valve with two-piece valve rods |
| CN102996813A (en) * | 2012-10-12 | 2013-03-27 | 安徽蓝德仪表有限公司 | High-pressure and high-sensitivity needle valve |
| CN105927762A (en) * | 2016-06-07 | 2016-09-07 | 大庆市华诚义机械设备有限公司 | Bivalve four-way combination body |
| CN110249167A (en) * | 2016-12-20 | 2019-09-17 | 莱卡姆动力传动系统责任有限公司 | Purification system with rotary connector |
-
2011
- 2011-09-23 CN CN2011203602404U patent/CN202228692U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102996813A (en) * | 2012-10-12 | 2013-03-27 | 安徽蓝德仪表有限公司 | High-pressure and high-sensitivity needle valve |
| CN102937189A (en) * | 2012-11-16 | 2013-02-20 | 镇江市华阳机电制造有限公司 | Needle valve with two-piece valve rods |
| CN105927762A (en) * | 2016-06-07 | 2016-09-07 | 大庆市华诚义机械设备有限公司 | Bivalve four-way combination body |
| CN110249167A (en) * | 2016-12-20 | 2019-09-17 | 莱卡姆动力传动系统责任有限公司 | Purification system with rotary connector |
| CN110249167B (en) * | 2016-12-20 | 2021-09-03 | 莱卡姆动力传动系统责任有限公司 | Decontamination system with swivel connector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120523 Termination date: 20130923 |