CN204784810U - Plug valve - Google Patents
Plug valve Download PDFInfo
- Publication number
- CN204784810U CN204784810U CN201520243289.XU CN201520243289U CN204784810U CN 204784810 U CN204784810 U CN 204784810U CN 201520243289 U CN201520243289 U CN 201520243289U CN 204784810 U CN204784810 U CN 204784810U
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- cock
- accepting hole
- diameter part
- minor diameter
- valve rod
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Abstract
The utility model discloses a plug valve, including the valve body, valve rod that have the runner and with the terminal swing joint of valve rod has the cock of runner with the valve body complex, plug valve is under the reset mode, and the state of valve body, not roof pressure cock of valve rod are hugged closely in cock promptly. Compared with the prior art, the utility model discloses well motor can set up to deciding stroke mode, does benefit to the realization fast switch over, and to avoid electrical burns out.
Description
Technical field
The utility model relates to air conditioner field, especially the stopcock of air-conditioning system.
Background technique
Stopcock is used for blocking or connecting medium pipeline, and the requirement of the stopcock in its process pipe to sealing is very high, all must prevent dielectric leakage in all cases.Carrying out promoting, rotating, pressing down, when the operation such as to press down, utilizing drive unit to the compression of the lifting and spool that realize spool, thus realize the switching of switching valve and the sealing that resets.Drive unit comprises motor and driving mechanism, and the commutation process of switching valve relies on the rotation of motor through drive mechanism transmission, be converted realization.Rotary flow path switching valve is due to the existence of internal leakage, and the upper and lower cavity that spool and valve body are formed has pressure and produces, and the air pressure in this upper and lower cavity is between high low pressure.Spool is under the effect of this air pressure, one is had to be adjacent to making a concerted effort of valve body, and the working principle of switching valve is the lifting and the compression that are driven spool by mechanical transmission, therefore existing scheme need overcome this atmospheric pressure could realize spool and valve body are departed from when commutation.Certainly will require that the moment of torsion that motor inputs and power are comparatively large like this, namely electric machine structure is comparatively large, causes that the physical dimension of product is large, weight is large, cost is high.Meanwhile, due to the existence of this atmospheric pressure, when commutation, due to the impact be stressed, the wearing and tearing of each moving element also can aggravate, and are unfavorable for the Long-Time Service of product, also reduce the reliability of product.In addition, due to the impact of atmospheric pressure, terminate in commutation, when spool is again replied and is adjacent to valve body, can produce noise, atmospheric pressure is larger, and noise also will be larger.
Given this, be necessary that a kind of new stopcock of design solves the problems referred to above.Publication number is that the Chinese invention patent of CN104197089A discloses a kind of rotary flow path switching valve and solves this problem; but solving general approach is that motor arrives the shutdown of certain moment; there is a process judging and send instruction, be unfavorable for quick switching, sometimes occur motor damage.
Model utility content
Technical problem to be solved in the utility model is just to provide a kind of stopcock, is beneficial to quick switching, avoids motor damage.
For solving the problems of the technologies described above, the utility model adopts following technological scheme: a kind of stopcock, comprise there is runner valve body, valve rod and the cock with runner coordinated with valve body that is flexibly connected with described valve stem end, cock is up big and down small taper, cock realizes switching by promoting, rotating and press down under the drive of valve rod, in the reset state, valve rod does not push up pressure cock to described stopcock.
Principle: by gravity and the cock of fluid unbalanced force compression of cock, like this, motor can be set to determine stroke mode of operation, general mode of operation be the moment compressed when being greater than setting value motor stop continuing to apply to drive, control system issues instructions to and performs because postponing to cause burn-down of electric motor sometimes.
Another stopcock, comprise there is runner valve body, valve rod and the cock with runner coordinated with valve body that is flexibly connected with described valve stem end, cock is up-small and down-big taper, cock switches by pressing down, rotating also lifting implementation under the drive of valve rod, in the reset state, valve rod does not push up pressure cock to described stopcock.
Principle: by spring force and the cock of fluid unbalanced force compression of cock, like this, motor can be set to determine stroke mode of operation, general mode of operation be the moment compressed when being greater than setting value motor stop continuing to apply to drive, control system issues instructions to and performs because postponing to cause burn-down of electric motor sometimes.The program can realize quick execution, does not worry that motor torque sharply rises the situation causing burning.
Compared with prior art, in the reset state, namely the state of valve body is close in cock to the utility model stopcock, and valve rod does not push up pressure cock, and therefore motor can be set to determine stroke mode of operation, is beneficial to and realizes switching fast, avoid burn-down of electric motor.
Accompanying drawing explanation
Fig. 1 is the main structure schematic diagram of the utility model stopcock;
Fig. 2 is the decomposition chart of cock and valve rod in the utility model first embodiment;
Fig. 3 is the combination assumption diagram of cock and valve rod in the utility model first embodiment;
Fig. 4 is partial structurtes enlarged view in Fig. 1;
Fig. 5 is the decomposition chart of cock and valve rod in the utility model second embodiment;
Fig. 6 is the combination assumption diagram of cock and valve rod in the utility model second embodiment;
Fig. 7 is partial enlarged drawing in the utility model second embodiment.
Embodiment
Refer to Fig. 1 to Fig. 7, describe the embodiment of the utility model stopcock below in conjunction with accompanying drawing in detail.
Refer to Fig. 1 to Fig. 3, the utility model stopcock, comprise there is horizontal run valve body 1, be sealedly attached to described valve body 1 vertically top valve gap 2, be sealedly attached to described valve body 1 vertically bottom bottom 3, wear valve rod 4 that described valve gap 2 arranges and be mounted on described valve rod 4 end and be placed in the cock 5 of described horizontal run, described bottom 3 is provided with cavity 6, and the rotating center place, bottom of described cock 5 is provided with the convex axle 7 coordinated with described cavity 6.
Described stopcock also comprises the whirl-stop device be arranged between cock 5 and valve rod 4, and the cavity 6 that described convex axle 7 is placed in bottom 3 is rotatably assorted, and forms the anti-displacement structure of cock.Runner in cock 5 communicates with the horizontal run of valve body 1, specifically can adopt cylinder straight channel, and such Flow area is larger, medium fluid drag reduction, more adapts to the work requirements under high temperature and high pressure condition.
Described valve rod 4 comprises mobile jib portion, end bar portion 41 and is positioned at the dop 42 of end bar portion end, described dop 42 comprises minor diameter part and large-diameter portion, the minor diameter part accepting hole 51 that described cock 5 is provided with through end face and the large-diameter portion accepting hole 52 communicated with minor diameter part accepting hole 51, described minor diameter part accepting hole 51 and large-diameter portion accepting hole 52 extend to the same side of described cock 5 and through, so that valve rod 4 is included in from the side of cock 5, described minor diameter part is contained in minor diameter part accepting hole 51, and described large-diameter portion is arranged in large-diameter portion accepting hole 52.
Also consult Fig. 2 and Fig. 3 especially incorporated by reference to Fig. 1, explain for the whirl-stop device in first embodiment's stopcock below.The cylinder in described end bar portion 41 is provided with end bar portion side plane 411, described cock 5 is provided with and the block 9 holding bar portion side plane 411 to mate to limit described valve rod 4 and cock 5 mutually to rotate, block 9 is fixed in cock 5 by screw, and described end bar portion side plane 411 and block 9 form described whirl-stop device jointly.The present embodiment, by the cooperation of cock 5, valve rod 4 and block 9 three, forms spline structure jointly, prevents cock 5 to reset deviation.
In the present embodiment, along coning plug valve, namely the cock of stopcock is up big and down small taper, cock realizes switching by promoting, rotating and press down under the drive of valve rod, and in the reset state, namely the state of valve body is close in cock to described stopcock, valve rod does not push up pressure cock, as shown in Figure 4, be close to the state of valve body in cock, between bottom surface, dop portion and large-diameter portion accepting hole bottom surface, be provided with gap A.
In addition, as shown in Figure 4, dop 42 has bulb 43, movable contact between dop 42 and cock 5, phase mutual noninterference, and the setting of bulb 43 is beneficial to the centering of cock 5.
Also consult Fig. 5 and Fig. 6 especially incorporated by reference to Fig. 1, explain for the whirl-stop device in second embodiment's stopcock below, because the agent structure of the present embodiment is identical with the first embodiment, therefore same section adopts identical label, repeats no more.The cylinder of described dop 42 large-diameter portion is provided with large-diameter portion side plane 421, is correspondingly provided with the block plane 521 coordinated with described large-diameter portion side plane 421 in described large-diameter portion accepting hole 52.The present embodiment, by the cooperation of block plane 521 that coordinates of large-diameter portion side plane 421 therebetween of cock 5, valve rod 4, forms spline structure jointly, prevents cock 5 to reset deviation.In the present embodiment, the cylinder of described dop 42 minor diameter part is provided with the minor diameter part side plane 422 coplanar with large-diameter portion side plane 421.In above-described embodiment, minor diameter part can be equal with the diameter in the mobile jib portion of valve rod, like this, simplifies the structure of valve rod, be also convenient to processing.
Principle: by gravity and the cock of fluid unbalanced force compression of cock, like this, motor can be set to determine stroke mode of operation, general mode of operation be the moment compressed when being greater than setting value motor stop continuing to apply to drive, control system issues instructions to and performs because postponing to cause burn-down of electric motor sometimes.
Also can be back taper stopcock in addition, namely the cock of stopcock is up-small and down-big taper, cock switches by pressing down, rotating also lifting implementation under the drive of valve rod, be provided with spring between cock and valve body, in the reset state, namely the state of valve body is close in cock to described stopcock, valve rod does not push up pressure cock, as shown in Figure 7, be close to the state of valve body in cock, between large-diameter portion end face and large-diameter portion accepting hole end face, be provided with gap B.
Principle; By spring force and the cock of fluid unbalanced force compression of cock, like this, motor can be set to determine stroke mode of operation, general mode of operation be the moment compressed when being greater than setting value motor stop continuing to apply to drive, control system issues instructions to and performs because postponing to cause burn-down of electric motor sometimes.The program can realize quick execution, does not worry that motor torque sharply rises the situation causing burning.
Above-described embodiment, only for technical conceive of the present utility model and feature are described, its object is to person skilled in the art can be understood content of the present utility model and implement according to this, can not limit protection domain of the present utility model with this.Such as, described in the second embodiment, the cylinder of dop large-diameter portion is provided with large-diameter portion side plane 421, and described large-diameter portion accepting hole 52 is provided with the block plane 521 of coupling, in some other embodiment, stopping surface is plane not necessarily, as long as non-rotating, as ellipsoid etc.Again such as spline structure also can till the structure that coordinates of retaining groove and block projection.That is, all equivalent transformations of doing according to the utility model Spirit Essence or modification, all should be encompassed within protection domain of the present utility model.
Claims (8)
1. a stopcock, comprise there is runner valve body, valve rod and the cock with runner coordinated with valve body that is flexibly connected with described valve stem end, cock is up big and down small taper, cock realizes switching by promoting, rotating and press down under the drive of valve rod, it is characterized in that: in the reset state, valve rod does not push up pressure cock to described stopcock.
2. stopcock according to claim 1, it is characterized in that: described valve rod comprises the dop of end, described dop comprises minor diameter part and large-diameter portion, the minor diameter part accepting hole that described cock is provided with through end face and the large-diameter portion accepting hole communicated with minor diameter part accepting hole, described minor diameter part accepting hole and large-diameter portion accepting hole extend to the same side of described cock and through, described minor diameter part is contained in minor diameter part accepting hole, and described large-diameter portion is arranged in large-diameter portion accepting hole.
3. stopcock according to claim 1, it is characterized in that: described valve rod comprises mobile jib portion, end bar portion and is positioned at the dop of end bar portion end, described dop comprises minor diameter part and large-diameter portion, the minor diameter part accepting hole that described cock is provided with through end face and the large-diameter portion accepting hole communicated with minor diameter part accepting hole, described minor diameter part accepting hole and large-diameter portion accepting hole extend to the same side of described cock and through, so that valve rod is included in from the side of cock, described minor diameter part is contained in minor diameter part accepting hole, and described large-diameter portion is arranged in large-diameter portion accepting hole.
4. stopcock according to claim 3, is characterized in that: described minor diameter part and mobile jib portion equal diameters.
5. the stopcock according to claim 3 or 4, it is characterized in that: the cylinder in described end bar portion is provided with side plane, described cock is provided with the block mating to limit described valve rod and cock with described side plane and mutually rotate, and described side plane and block form whirl-stop device jointly.
6. the stopcock according to claim 3 or 4, is characterized in that: the cylinder of the minor diameter part of described dop is provided with minor diameter part side plane.
7. a stopcock, comprise there is runner valve body, valve rod and the cock with runner coordinated with valve body that is flexibly connected with described valve stem end, cock is up-small and down-big taper, cock switches by pressing down, rotating also lifting implementation under the drive of valve rod, it is characterized in that: in the reset state, valve rod does not push up pressure cock to described stopcock.
8. stopcock according to claim 7, it is characterized in that: described valve rod comprises the dop of end, described dop comprises minor diameter part and large-diameter portion, the minor diameter part accepting hole that described cock is provided with through end face and the large-diameter portion accepting hole communicated with minor diameter part accepting hole, described minor diameter part accepting hole and large-diameter portion accepting hole extend to the same side of described cock and through, described minor diameter part is contained in minor diameter part accepting hole, and described large-diameter portion is arranged in large-diameter portion accepting hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520243289.XU CN204784810U (en) | 2015-04-21 | 2015-04-21 | Plug valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520243289.XU CN204784810U (en) | 2015-04-21 | 2015-04-21 | Plug valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204784810U true CN204784810U (en) | 2015-11-18 |
Family
ID=54524860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520243289.XU Active CN204784810U (en) | 2015-04-21 | 2015-04-21 | Plug valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204784810U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105927747A (en) * | 2016-07-12 | 2016-09-07 | 阀工阀门有限公司 | Lift plug valve |
| CN113294583A (en) * | 2021-04-30 | 2021-08-24 | 西安航天远征流体控制股份有限公司 | Pressure balance type plug valve and driving device thereof |
-
2015
- 2015-04-21 CN CN201520243289.XU patent/CN204784810U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105927747A (en) * | 2016-07-12 | 2016-09-07 | 阀工阀门有限公司 | Lift plug valve |
| CN105927747B (en) * | 2016-07-12 | 2018-04-06 | 李忠武 | One kind lifting plug valve |
| CN113294583A (en) * | 2021-04-30 | 2021-08-24 | 西安航天远征流体控制股份有限公司 | Pressure balance type plug valve and driving device thereof |
| CN113294583B (en) * | 2021-04-30 | 2024-03-08 | 西安航天远征流体控制股份有限公司 | Pressure balance type plug valve and driving device thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |