CN215487676U - Fluorine-lined stop valve - Google Patents

Abstract

The utility model relates to a fluorine-lined stop valve which comprises a valve body, a valve rod, a valve clack, a valve seat and a driving mechanism, wherein a flow passage for medium to flow is arranged in the valve body, the driving mechanism drives the valve rod to move along the direction vertical to the flow passage, the valve clack is arranged on the valve rod and is in sealing fit with the valve seat to form the cutoff of the flow passage, the valve rod is sequentially divided into a main valve rod and a slave valve rod from top to bottom along the vertical direction, a buffer groove is arranged at the top of the valve rod, an extending part extends towards the center from the periphery of the buffer groove, the extending part forms a through hole positioned in the center of the buffer groove, the main valve rod is provided with a sliding block matched with the through hole in size, the sliding block is provided with the buffer block positioned in the buffer groove, and a buffer spring is arranged between the buffer block and the extending part. The utility model provides a fluorine-lined stop valve with a valve clack and a valve seat which are not easy to wear.

Description

Fluorine-lined stop valve

Technical Field

The utility model relates to a stop valve, in particular to a fluorine-lined stop valve.

Background

The stop valve is also called stop valve, belonging to forced sealing type valve, so when the valve is closed, it must apply pressure to valve clack to force sealing surface not to leak, when the medium is fed into the valve from below the valve clack, the resistance force which must be overcome by operation force is the friction force of valve stem and packing material and the thrust force produced by pressure of medium, the force for closing the valve is greater than the force for opening the valve, so the diameter of valve stem is greater, otherwise the failure of stem top bending can occur.

When the valve is driven to close by a manual mode, an operator cannot observe the contact condition of the valve clack and the valve seat, so that the valve clack and the valve seat are easy to be too tight, the valve clack and the valve seat are impacted by media, the contact surface of the valve clack and the valve seat is quickly abraded, and the sealing performance is reduced.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model aims to provide a fluorine-lined stop valve with a valve clack and a valve seat which are not easy to wear.

In order to achieve the purpose, the utility model provides the following technical scheme: including valve body, valve rod, valve clack, disk seat and actuating mechanism, be provided with the runner that supplies the medium circulation in the valve body, actuating mechanism drives the valve rod and removes along the direction of perpendicular to runner, and the valve clack sets up on the valve rod and constitutes cutting to the runner with the sealed cooperation of disk seat, the valve rod divide into main valve pole and from the valve rod from top to bottom in proper order along vertical, be provided with the dashpot from the valve rod top, the dashpot extends towards the center all around and is provided with the extension, the extension forms the opening that is located the dashpot center, main valve pole be provided with the sliding block with opening size looks adaptation, be provided with the buffer block that is located the dashpot on the sliding block, be provided with the elastic layer between buffer block and the dashpot, be provided with buffer spring between buffer block and the extension.

By adopting the technical scheme, when the stop valve needs to be closed, the driving mechanism drives the main valve rod to move downwards along the vertical direction, so that the buffer block moves towards the bottom of the buffer groove to extrude the elastic layer, so that the valve rod moves downwards until the valve clack is pressed against the valve seat, the flow passage is cut off by sealing fit, the stop valve is closed at the moment, however, the manually controlled driving mechanism easily causes the valve clack and the valve seat to be excessively squeezed, causes the contact surface of the valve clack and the valve seat to be rapidly worn under the impact of a medium, the proposal is provided with the elastic layer and the buffer spring, so that before the valve clack and the valve seat are extruded too much, the elastic layer is extruded more greatly, the contraction degree of the elastic layer is larger, the relative displacement between the main valve rod and the slave valve rod is increased, therefore, the acting force of the main valve rod on the slave valve rod is relieved, and the valve clack and the valve seat are not excessively abraded on the premise of ensuring the sealing performance of the valve.

The utility model is further configured to: the buffer block on be provided with the fixed orifices, be provided with the vertical groove corresponding with the fixed orifices position on the buffer slot lateral wall, be provided with fixed pin and fixed pin on the fixed orifices and extend to vertical inslot, fixed pin, fixed orifices and vertical groove constitute the main valve pole and follow the circumferential direction of valve rod.

By adopting the technical scheme, the driving mechanism enables the main valve rod to spirally lift through the threads, and the fixing pin, the fixing hole and the vertical groove enable the main valve rod to drive the main valve rod to rotate when rotating, when the main valve rod extrudes the elastic layer, and the elastic layer is compressed and deformed, the height of the main valve rod is reduced relatively to the descending height of the main valve rod though the main valve rod extends and rotates, namely the descending height of the main valve rod is the same as the descending height of the main valve rod through the addition of the descending height of the valve rod and the deformation degree of the elastic layer, and the fixing pin slides in the vertical groove at the moment.

The utility model is further configured to: the flow channel comprises an inlet flow channel and an outlet flow channel, the height of the inlet flow channel gradually decreases along the medium flowing direction, the height of the outlet flow channel gradually increases along the medium flowing direction, a transition flow channel along the vertical direction is arranged between the inlet flow channel and the outlet flow channel, and the valve seat is arranged in the transition flow channel and forms a seal for the transition flow channel with the valve clack.

Through adopting above-mentioned technical scheme, the medium is when the inflow to transition runner from the inlet channel, be blockked by valve clack and disk seat, after the valve clack rises, the medium rises and flows from outlet channel, because the inlet channel wholly is the decline trend and outlet channel is the rising trend, make transition runner be vertical state, when the medium flow to touch with the valve clack, if want to break away the gravity that the valve clack need overcome the valve clack and the power of valve rod to the valve clack, required power is great, the event is difficult to be destroyed by the medium, and it is also littleer to need the extra power of exerting of valve rod, the contact surface between effectual protective force valve clack and the disk seat is not worn and torn.

The utility model is further configured to: the valve rod and the extension part are arranged separately.

Through adopting above-mentioned technical scheme, will follow valve rod and extension and make respectively for the production and processing degree of difficulty that follows valve rod and main valve rod reduces.

The utility model is further configured to: and polytetrafluoroethylene layers are arranged on the inner side of the valve body and the valve rod.

Through adopting above-mentioned technical scheme, set up the polytetrafluoroethylene layer in valve body inner wall and valve rod, overcome polytetrafluoroethylene material shortcoming that intensity is low promptly, solved valve body main part material poor, with high costs not enough again, in addition, polytetrafluoroethylene has except that excellent chemical stability, and its antifouling, antiseized nature is good, the coefficient of static friction coefficient is minimum and close, antifriction lubricity is good.

Drawings

FIG. 1 is a schematic structural view of the present invention as a whole;

FIG. 2 is a partial enlarged view A of the present invention;

fig. 3 is a schematic view of the fixing pins, fixing holes and vertical grooves of the present invention.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

As shown in FIGS. 1-3, the utility model discloses a fluorine-lined stop valve, which comprises a valve body 1, a valve rod 2, a valve flap 3, a valve seat 4 and a driving mechanism 7, wherein a flow passage 5 for medium circulation is arranged in the valve body 1, the driving mechanism 7 drives the valve rod 2 to move along the direction vertical to the flow passage 5, the valve flap 3 is arranged on the valve rod 2 and is in sealing fit with the valve seat 4 to form the cutoff of the flow passage 5, the valve rod 2 is vertically and sequentially divided into a main valve rod 21 and a slave valve rod 22 from top to bottom, a buffer groove 23 is arranged at the top of the slave valve rod 22, an extending part 24 extends towards the center around the buffer groove 23, the extending part 24 forms a through hole 25 positioned at the center of the buffer groove 23, the main valve rod 21 is provided with a sliding block 26 matched with the size of the through hole 25, the buffer block 27 positioned in the buffer groove 23 is arranged on the sliding block 26, an elastic layer 28 is arranged between the buffer block 27 and the buffer groove 23, a buffer spring 29 is arranged between the buffer block 27 and the extending part 24, when the stop valve needs to be closed, the driving mechanism 7 drives the main valve rod 21 to move vertically downwards, so that the buffer block 27 moves towards the bottom of the buffer groove 23, so as to extrude the elastic layer 28, and further the slave valve rod 22 moves downwards until the valve clack 3 abuts against the valve seat 4, the flow channel 5 is cut off through sealing fit, at the moment, the stop valve is closed, but the manually controlled driving mechanism 7 easily causes the excessive extrusion of the valve clack 3 and the valve seat 4, so that the contact surface of the valve clack 3 and the valve seat 4 is quickly worn under the impact of media, the scheme is provided with the elastic layer 28 and the buffer spring 29, before the excessive extrusion of the valve clack 3 and the valve seat 4, the elastic layer 28 is greatly extruded, so that the contraction degree of the elastic layer 28 is larger, the relative displacement between the main valve rod 21 and the slave valve rod 22 is increased, so that the acting force of the main valve rod 21 on the valve rod 22 is relieved, and the sealing performance of the slave valve is ensured, so that the valve flap 3 and the valve seat 4 are not worn too much.

The buffer block 27 is provided with a fixing hole 271, the side wall of the buffer groove 23 is provided with a vertical groove 272 corresponding to the position of the fixing hole 271, the fixing hole 271 is provided with a fixing pin 273, the fixing pin 273 extends into the vertical groove 272, the fixing pin 273, the fixing hole 271 and the vertical groove 272 form the circumferential rotation of the main valve rod 21 and the main valve rod 22, the driving mechanism 7 enables the main valve rod 21 to spirally lift and lower through threads, the fixing pin 273, the fixing hole 271 and the vertical groove 272 make the main valve rod 21 rotate to drive the auxiliary valve rod 22 to rotate, when the main valve rod 21 presses the elastic layer 28, when the elastic layer 28 is deformed by pressure, although it extends from the valve stem 22 and rotates, its height is reduced to a smaller height than the main valve stem 21, i.e., the descending height from the valve stem 22 plus the degree of deformation of the resilient layer 28 is the same as the descending height of the main valve stem 21, at which time the fixing pin 273 slips in the vertical groove 272.

The flow passage 5 comprises an inlet flow passage 51 and an outlet flow passage 53, the height of the inlet flow passage 51 gradually decreases along the medium flowing direction, the height of the outlet flow passage 53 gradually increases along the medium flowing direction, a vertical transition flow passage 52 is arranged between the inlet flow passage 51 and the outlet flow passage 53, the valve seat 4 is arranged in the transition flow passage 52 and forms a seal for the transition flow passage 52 with the valve flap 3, when the medium enters into the transition flow passage 52 from the inlet flow passage 51, the medium is blocked by the valve flap 3 and the valve seat 4, after the valve flap 3 rises, the medium rises and flows out from the outlet flow passage 53, because the inlet flow passage 51 integrally falls and the outlet flow passage 53 rises, the transition flow passage 52 is in a vertical state, when the medium flows to contact with the valve flap 3, if the valve flap 3 is to be opened, the gravity of the valve flap 3 and the force of the valve rod 2 to the valve flap 3 need to be overcome, the required force is large, so the medium is not easy to be damaged, and the extra force required to be applied by the valve rod 2 is smaller, so that the contact surface between the force valve clack 3 and the valve seat 4 is effectively protected from being abraded.

The slave valve stem 22 and the extension portion 24 are separately arranged, and the slave valve stem 22 and the extension portion 24 are manufactured respectively, so that the production and processing difficulty of the slave valve stem 22 and the master valve stem 21 is reduced.

The polytetrafluoroethylene layer 6 is arranged on the inner side of the valve body 1 and the valve rod 2, the polytetrafluoroethylene layer 6 is arranged on the inner wall of the valve body 1 and the valve rod 2, the defect of low strength of a polytetrafluoroethylene material is overcome, and the defects of poor corrosion resistance and high cost of a main body material of the valve body 1 are overcome.

Claims (5)

1. The utility model provides a lining fluorine stop valve, includes valve body, valve rod, valve clack, disk seat and actuating mechanism, is provided with the runner that supplies the medium circulation in the valve body, and actuating mechanism drives the valve rod and removes along the direction of perpendicular to runner, and the valve clack sets up on the valve rod and constitutes cutting its characterized in that to the runner with the sealed cooperation of disk seat: the valve rod divide into main valve pole and valve rod from top to bottom along vertical in proper order, be provided with the dashpot from the valve rod top, the dashpot extends towards the center all around and is provided with the extension, the extension forms the opening that is located the dashpot center, main valve pole be provided with the sliding block of opening size looks adaptation, be provided with the buffer block that is located the dashpot on the sliding block, be provided with the elastic layer between buffer block and the dashpot, be provided with buffer spring between buffer block and the extension.

2. The fluorine-lined stop valve according to claim 1, wherein: the buffer block on be provided with the fixed orifices, be provided with the vertical groove corresponding with the fixed orifices position on the buffer slot lateral wall, be provided with fixed pin and fixed pin on the fixed orifices and extend to vertical inslot, fixed pin, fixed orifices and vertical groove constitute the main valve pole and follow the circumferential direction of valve rod.

3. The fluorine-lined stop valve according to claim 1, wherein: the flow channel comprises an inlet flow channel and an outlet flow channel, the height of the inlet flow channel gradually decreases along the medium flowing direction, the height of the outlet flow channel gradually increases along the medium flowing direction, a transition flow channel along the vertical direction is arranged between the inlet flow channel and the outlet flow channel, and the valve seat is arranged in the transition flow channel and forms a seal for the transition flow channel with the valve clack.

4. The fluorine-lined stop valve according to claim 1, wherein: the valve rod and the extension part are arranged separately.

5. The fluorine-lined stop valve according to claim 1, wherein: and polytetrafluoroethylene layers are arranged on the inner side of the valve body and the valve rod.

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