CN212960137U - Rising stem plate valve closing limiting structure - Google Patents
Rising stem plate valve closing limiting structure Download PDFInfo
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- CN212960137U CN212960137U CN202021769783.7U CN202021769783U CN212960137U CN 212960137 U CN212960137 U CN 212960137U CN 202021769783 U CN202021769783 U CN 202021769783U CN 212960137 U CN212960137 U CN 212960137U
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Abstract
The utility model provides a rising stem plate valve closes limit structure, its characterized in that includes support, valve-stem nut, thrust bearing, bearing gland, drive structure, stop nut, lock nut, the inside mounting hole of having seted up of drive structure, install valve rod and valve-stem nut in the mounting hole, the valve rod passes through helicitic texture and valve-stem nut and connects, the utility model relates to a partly among the rising stem plate valve has accurate spacing position adjustable, characteristics such as simple structure is easy. After the utility model is used for limiting, the valve can not be closed continuously due to the rotation of the valve rod, thereby preventing the inaccurate sealing position of the valve, influencing the sealing performance of the valve and preventing the danger of excessive closing and deformation of the stress of the valve rod; the utility model discloses avoided the damage of valve, valve rod after using, prolonged the life of valve invisibly, had good economic benefits and social, be fit for using widely.
Description
Technical Field
The utility model relates to a mechanical engineering valve technical field especially relates to a rising stem plate valve closes limit structure.
Background
A valve is a device used in a fluid system to control the direction, pressure, and flow of a fluid. The valve is a control part in a pipeline fluid conveying system, is used for changing the section of a passage and the flowing direction of a medium, and has the functions of diversion, cut-off, throttling, non-return, flow division, overflow pressure relief and the like. Valves used for fluid control range from the simplest shut-off valves to the most complicated valves used in autonomous systems, which are of a wide variety of types and specifications, with nominal diameters of the valves ranging from small-scale instrumentation valves up to industrial line valves with diameters of up to 10 m. The valve can be used for controlling various types of fluid such as water, steam, oil products, gas, mud, various corrosive media, liquid metal, radioactive fluid and the like to flow, the working pressure of the valve can be from 0.013Mpa to 138Mpa ultrahigh pressure, and the working temperature can be from-196 ℃ of ultralow temperature to 1350 ℃ of high temperature. The valve can be controlled by adopting various transmission modes, such as manual, electric, hydraulic, pneumatic, turbine, electromagnetic hydraulic, electrohydraulic, pneumatic hydraulic, spur gear, bevel gear drive and the like; the valve can be operated according to the preset requirement under the action of pressure, temperature or other forms of sensing signals, or can be simply opened or closed without depending on the sensing signals, and the valve can make the opening and closing piece perform lifting, sliding, swinging or rotating motion by depending on a driving or automatic mechanism, so that the size of the flow passage area of the valve can be changed to realize the control function of the valve.
With the development of society, the requirements of people on valves are gradually increased, the functions of the valves are gradually increased, and the valves need to have the performances of high pressure resistance, convenience in disassembly and assembly, economy, energy conservation, environmental protection and the like. The flat gate valve is a sliding valve with a closing key of a parallel gate plate, and because the flow resistance is small and the gate plates slide on the two valve seat surfaces, the flat gate valve can be suitable for media with suspended particles, and is widely applied to the field of petroleum and natural gas transportation or tap water engineering. Among the prior art, plate valve does not have accurate limit structure, directly revolves to twist the valve rod when closing and reaches the closing action, and the valve rod plays simple limiting displacement together, but because valve rod simple structure causes the maloperation easily when operating now, causes the deviation of plate valve sealing position, influences product sealing performance, and staff sometimes can close the easy emergence excessively hard in order to avoid leaking the meeting strength and close, causes the valve rod to push up the curved deformation condition.
Disclosure of Invention
According to the technical problems, the utility model provides a rising stem flat gate valve closing limit structure, it is characterized by comprising a bracket, a valve rod nut, a thrust bearing, a bearing gland, a driving structure, a limit nut and a locking nut, the driving structure is internally provided with a mounting hole, a valve rod and a valve rod nut are arranged in the mounting hole, the valve rod is connected with the valve rod nut through a thread structure, the side surface of the upper end of the valve rod is provided with a limit nut and a locknut through threads, the limit nut and the locknut are screwed on the upper end of the valve rod side by side, the limit nut is of a special-shaped structure, the driving structure is an inverted T-shaped structure, the driving structure is connected with a hexagonal square hole of the valve rod nut, and the valve rod nut is fixed with the support through a bearing gland, and the bearing gland is arranged in the middle of the valve rod nut and the support.
The upper side of the locking nut is provided with a groove, and the groove is matched with the lower end of the limit nut of the special-shaped structure.
The valve rod nut is sleeved on the valve rod.
The valve rod is matched with the valve rod nut through trapezoidal threads.
And the limiting nut and the locking nut are in threaded connection with the valve rod.
The driving structure is a hand wheel.
The utility model has the advantages that: the utility model relates to a partly among rising stem plate valve, it is adjustable to have accurate spacing nature limit position, characteristics such as simple structure is easy. After the utility model is used for limiting, the valve can not be closed continuously due to the rotation of the valve rod, thereby preventing the inaccurate sealing position of the valve, influencing the sealing performance of the valve and preventing the danger of excessive closing and deformation of the stress of the valve rod; the utility model discloses avoided the damage of valve, valve rod after using, prolonged the life of valve invisibly, had good economic benefits and social, be fit for using widely.
The utility model discloses through clockwise rotation hand wheel during the use, the hand wheel drives valve-stem nut rotatory, and the action is closed to the valve, and the valve rod moves down. When the valve rod reaches the closing position, the limiting nut acts on the valve rod nut to limit the downward movement of the valve rod, and the limiting protection effect is achieved.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is the installation schematic diagram of the limit nut and the locknut of the utility model.
Fig. 3 is the structure schematic diagram of the limiting nut and the locking nut when the utility model is used for limiting.
As shown in the figure: the device comprises a support 1, a valve rod 2, a valve rod nut 3, a bearing gland 4, a driving structure 5, a limiting nut 6, a locknut 7 and a locking nut 8.
Detailed Description
Example 1
The utility model provides a rising stem plate valve closes limit structure, which comprises a bracket 1, valve rod nut 3, thrust bearing, bearing gland 4, drive structure 5, stop nut 6, lock nut 8, the inside mounting hole that has seted up of drive structure 5, install valve rod 2 and valve rod nut 3 in the mounting hole, valve rod 2 passes through helicitic texture and valve rod nut 3 and connects, 2 upper end side screw threads of valve rod have stop nut 6 and lock nut 7, stop nut 6 and lock nut 7 tighten up side by side in 2 upper ends of valve rod, stop nut 6 is the dysmorphism structure, drive structure 5 is type of falling T structure, drive structure 5 and 3 hexagonal square hole connections of valve rod nut, and fix through lock nut 8, valve rod nut 3 is fixed through bearing gland 4 with support 1, bearing gland 4 installs in valve rod nut 3 and 1 intermediate position of support. The upper side of the locking nut 8 is provided with a groove which is matched with the lower end of the limit nut 6 with a special-shaped structure. The valve rod nut 3 is sleeved on the valve rod 2. The valve rod 2 is matched with the valve rod nut 3 through trapezoidal threads. And the limiting nut 6 and the locking nut 8 are in threaded connection with the valve rod 2. The driving structure 5 is a hand wheel.
Example 2
The utility model discloses during the use, with valve rod 2 and valve-stem nut 3 through trapezoidal thread fit, realize that 3 rotary motion of valve-stem nut turns into the lift removal of valve rod 2. The limit nut 6 is connected with the valve rod 2 through threads and moves up and down together with the valve rod 2. The locknut 7 and the limiting nut 6 are tightened side by side for locking. The valve rod nut 3 is fixed with the bracket 1 through a bearing gland 4. The hand wheel 5 is connected with the hexagonal hole of the valve rod nut 3 and is fixed through 8 locking nuts. By clockwise rotating the hand wheel 5, the hand wheel 5 drives the valve rod nut 3 to rotate, and the valve rod 2 moves downwards to drive the opening and closing piece to close. When arriving closed position, stop nut 6 is used in valve rod nut 3, and the restriction valve rod continues to move down, plays accurate limiting displacement, has protected valve rod 2 and valve rod nut 3 simultaneously. After spacing, the valve can not continue to close because of the rotation of valve rod, and limit structure's accurate spacing has prevented that the inaccurate valve seal position from influencing valve sealing performance to and prevent excessively to close, the danger of valve rod atress deformation.
The utility model discloses the theory of operation does: during the use, the staff is twisted and is moved the drive structure, the drive structure drives stem nut 3 and rotates, stem nut and valve rod 2 together carry out the lift and move, when valve rod 2 descends to lock nut 8 position, stop nut 6's protrusion end inserts in lock nut 8's the recess, stop nut 6 and lock nut 8 lock this moment, the valve rod can not descend again, the restriction valve rod continues downstream, play accurate limiting displacement, valve rod 2 and stem nut 3 have been protected simultaneously. After spacing, the valve can not continue to close because of the rotation of valve rod, and limit structure's accurate spacing has prevented that the inaccurate valve seal position from influencing valve sealing performance to and prevent excessively to close, the danger of valve rod atress deformation.
The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. The utility model discloses each part that mentions is the common technique in prior art, and the technical personnel of this trade should understand, the utility model discloses do not receive the restriction of above-mentioned embodiment, the description only is the explanation in above-mentioned embodiment and the description the principle of the utility model, under the prerequisite that does not deviate from the spirit and the scope of the utility model, the utility model discloses still can have various changes and improvement, these changes and improvement all fall into the protection of claim the utility model is within the scope. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. The utility model provides a rising stem plate valve closes limit structure, its characterized in that includes support, valve-stem nut, thrust bearing, bearing gland, drive structure, stop nut, lock nut, the inside mounting hole of having seted up of drive structure, install valve rod and valve-stem nut in the mounting hole, the valve rod passes through the helicitic texture and valve-stem nut connects, stop nut and lock nut are installed to valve rod upper end side screw thread, stop nut and lock nut screw up side by side in the valve rod upper end, stop nut is special-shaped structure, the drive structure is type of falling T structure, drive structure and the hexagonal square jogged joint of valve-stem nut to fix through lock nut, it is fixed that valve-stem nut passes through bearing gland with the support, bearing gland installs in valve-stem nut and support intermediate position.
2. The rising stem plate valve closing limit structure of claim 1, wherein the locking nut has a groove on its upper side, and the groove is engaged with the lower end of the limit nut of the special-shaped structure.
3. The rising stem flat gate valve closing limit structure of claim 1, wherein the stem nut is sleeved on the valve stem.
4. The rising stem flat gate valve closing limit structure of claim 1, wherein the valve stem is engaged with the valve stem nut by trapezoidal threads.
5. The rising stem plate valve closing limit structure of claim 1, wherein the limit nut, the lock nut and the valve stem are in threaded connection.
6. The rising stem flat gate valve closing limit structure of claim 1, wherein the driving structure is a hand wheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021769783.7U CN212960137U (en) | 2020-08-23 | 2020-08-23 | Rising stem plate valve closing limiting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021769783.7U CN212960137U (en) | 2020-08-23 | 2020-08-23 | Rising stem plate valve closing limiting structure |
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| Publication Number | Publication Date |
|---|---|
| CN212960137U true CN212960137U (en) | 2021-04-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021769783.7U Active CN212960137U (en) | 2020-08-23 | 2020-08-23 | Rising stem plate valve closing limiting structure |
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| CN (1) | CN212960137U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113757402A (en) * | 2021-09-10 | 2021-12-07 | 浙江胜得龙阀门有限公司 | Gate valve with closing limiting device |
-
2020
- 2020-08-23 CN CN202021769783.7U patent/CN212960137U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113757402A (en) * | 2021-09-10 | 2021-12-07 | 浙江胜得龙阀门有限公司 | Gate valve with closing limiting device |
| CN113757402B (en) * | 2021-09-10 | 2023-11-07 | 浙江胜得龙阀门有限公司 | Gate valve with closing limiting device |
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