CN212718031U

CN212718031U - Turnover stop valve

Info

Publication number: CN212718031U
Application number: CN202021349850.XU
Authority: CN
Inventors: 于成亮; 张大辉; 蔡飞; 杨忠义; 杨凯旋
Original assignee: Shanghai Koko Valve Group Co ltd
Current assignee: Shanghai Koko Valve Group Co ltd
Priority date: 2020-07-10
Filing date: 2020-07-10
Publication date: 2021-03-16
Anticipated expiration: 2030-07-10

Abstract

A turnover stop valve comprises a valve body, wherein a valve cover is fixedly arranged above the valve body, a support is fixedly arranged on the valve cover, a valve rod is movably connected in the middle of the support, the end part of the valve rod penetrates through the valve cover and is movably connected with a valve clack, the side surface of the valve clack is connected with one end of a cantilever, the other end of the cantilever is movably connected onto a cantilever frame through a rotating shaft, a first sliding bearing is fixedly arranged in the middle of the cantilever frame, and the valve rod is movably connected; the lower surface of the inner cavity of the valve body is provided with a curved surface groove, one side surface of the curved surface groove is arranged to be a plane, one end of the side surface of the valve clack is in contact with the plane on one side of the curved surface groove, a sealing block is arranged below the cantilever, and the other end of the side surface of the valve clack is in contact with the side surface of the sealing block. The utility model overcomes prior art's is not enough, has direct full latus rectum, flow resistance little, can force characteristics such as sealed, installation easy maintenance.

Description

Turnover stop valve

Technical Field

The utility model relates to a stop valve technical field, concretely relates to upset stop valve.

Background

At present, in an ultra-low temperature and ultra-high temperature system, the flow resistance of a valve is required to be small, the pressure and the temperature of a medium which is lost through the valve are low, the valve has the characteristic of forced sealing, the flow resistance of a common stop valve is large, the pressure and the temperature are high, the gate valve is easy to expand and die, the automatic sealing valves such as a ball valve are poor in reliability and cannot realize forced sealing, a valve rod of a butterfly valve is exposed in the medium, and the valve rod is easy to erode and deform.

SUMMERY OF THE UTILITY MODEL

The utility model provides a to prior art not enough, the utility model provides a upset stop valve has overcome prior art not enough, reasonable in design, has direct full latus rectum, flow resistance little, can force characteristics such as sealed, installation easy maintenance.

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes:

a turnover stop valve comprises a valve body, wherein a valve cover is fixedly arranged above the valve body, a support is fixedly arranged on the valve cover, a valve rod is movably connected in the middle of the support, the end part of the valve rod penetrates through the valve cover and is movably connected with a valve clack, the side surface of the valve clack is connected with one end of a cantilever, the other end of the cantilever is movably connected onto a cantilever frame through a rotating shaft, the cantilever frame is fixedly arranged at a flange above the valve body, a first sliding bearing is fixedly arranged in the middle of the cantilever frame, and the valve rod penetrates through the first sliding bearing and is movably connected with the first sliding; the valve body inner chamber lower surface is provided with the curved surface groove, a side surface of curved surface groove sets up to the plane, the one end of valve clack side surface contacts with the plane of curved surface groove one side, the below of cantilever is provided with sealed piece, the other end of valve clack side surface contacts with the side surface of sealed piece, sealed piece side surface and the plane of curved surface groove one side form sealed vice, sealed vice and the runner center of valve body inner chamber form an angle.

Preferably, the inside board that splines that is provided with of support, the hole that splines has been seted up in the middle of the board that splines, the valve rod through the hole that splines with spline fixed connection, the board both sides that splines are all seted up flutedly, support internal surface both sides are provided with the support slide rail, the board that splines passes through recess sliding connection on the support slide rail surface.

Preferably, the contact surfaces between the valve clack and the cantilever are a spherical surface and a cylindrical hole surface respectively, and the spherical surface and the cylindrical hole surface are matched to realize sealing connection.

Preferably, the contact surfaces between the valve clack and the cantilever are all welded with hard alloy.

Preferably, the end of the valve rod is provided with a waist-shaped hole, a cylindrical pin shaft is fixedly mounted on the side surface of the valve clack, and the valve clack is in sliding connection in the waist-shaped hole through the cylindrical pin shaft.

Preferably, a positioning pin is fittingly installed on a side surface of the cantilever frame.

Preferably, a second sliding bearing is installed in the middle of the valve cover, and the valve rod penetrates through the second sliding bearing and is movably connected with the second sliding bearing; the packing is filled above the second sliding bearing, a packing pressing sleeve is arranged above the packing, a packing pressing plate is arranged above the packing pressing sleeve, the packing pressing plate is fixedly arranged on the upper surface of the valve cover through a stud, and a belleville spring is sleeved between the packing pressing plate and the stud.

The utility model provides a turnover stop valve. The method has the following beneficial effects: whole device is for stop valve, butterfly valve, has the advantage that the flow resistance is little, the pressure loss is little, the temperature decreases for a short time, can the scavenge pipe, for the gate valve, has longe-lived advantage, and is troublesome for self sealss such as ball valve, has the advantage that can force to close. And all internals can all be taken out and the installation from valve body 1 upper portion, this application valve is installed behind the pipeline, can maintain and maintain under the condition of not dismantling the valve to shorten maintenance duration greatly. And in the great occasion of difference in temperature, the valve clack of this application can not cause valve function failure because of thermal expansion, cold shrink.

Drawings

In order to more clearly illustrate the present invention or the technical solutions in the prior art, the drawings used in the description of the prior art will be briefly described below.

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

FIG. 2 is a schematic view of the structure of the valve rod, the valve clack and the cantilever of the present invention;

FIG. 3 is a schematic structural view of the interior of the middle valve cover of the present invention;

FIG. 4 is a schematic cross-sectional view taken at A-A of FIG. 1;

the reference numbers in the figures illustrate:

1. a valve body; 2. a valve cover; 3. a support; 4. a valve stem; 5. a valve flap; 6. a cantilever; 7. a rotating shaft; 8. a cantilever mount; 9. a curved groove; 10. a sealing block; 11. a rotation stopping plate; 12. a rotation stopping hole; 13. a first sliding bearing; 14. a groove; 15. a bracket slide rail; 16. a waist-shaped hole; 17. a cylindrical pin shaft; 18. a second sliding bearing; 19. a filler; 20. pressing and sleeving the filler; 21. a packing press plate; 22. a stud; 23. a disc spring; 24. and positioning the pin.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the drawings of the present invention will be combined below to clearly and completely describe the technical solutions of the present invention.

In a first embodiment, as shown in fig. 1 to 4, a roll-over stop valve includes a valve body 1, a valve cover 2 is fixedly installed above the valve body 1, a support 3 is fixedly installed on the valve cover 2 through a fixing bolt, a valve rod 4 is movably connected in the middle of the support 3, an end portion of the valve rod 4 penetrates through the valve cover 2 and is movably connected with a valve flap 5, a side surface of the valve flap 5 is connected with one end of a cantilever 6, the other end of the cantilever 6 is movably connected to a cantilever frame 8 through a rotating shaft 7, the cantilever frame 8 is fixedly installed at a flange above the valve body 1, a first sliding bearing 13 is fixedly installed in the middle of the cantilever frame 8, and the valve rod 4 penetrates through; the lower surface of the inner cavity of the valve body 1 is provided with a curved surface groove 9, one side surface of the curved surface groove 9 is arranged to be a plane, one end of the side surface of the valve clack 5 is in contact with the plane on one side of the curved surface groove 9, a sealing block 10 is arranged below the cantilever 6, the other end of the side surface of the valve clack 5 is in contact with the side surface of the sealing block 10, the side surface of the sealing block 10 and the plane on one side of the curved surface groove 9 form a sealing pair, and the sealing pair and the center.

When the valve is required to be closed, the two ends of the side surface of the valve clack 5 are respectively contacted with the side surface of the sealing block 10 and the plane on one side of the curved groove 9 through downward movement of the control valve rod 4, so that the closing action of the valve is realized, and when the valve is required to be opened, the control valve rod 4 moves upwards. In the embodiment of the utility model, waist shape hole 16 has been seted up to the tip of valve rod 4, and valve clack 5 side surface fixed mounting has cylindrical pin axle 17, and valve clack 5 passes through cylindrical pin axle 17 sliding connection in waist shape hole 16. Therefore, the valve clack 5 horizontally moves in the waist-shaped hole 16 through the cylindrical pin shaft 17 in the rotating process, so that the friction force is reduced, the opening and closing torque of the valve is reduced, and meanwhile, the abrasion loss of the cylindrical pin shaft 17 and the waist-shaped hole 16 of the valve rod 4 is reduced, and the service life of the valve is prolonged.

Whole device is for stop valve, butterfly valve, has the advantage that the flow resistance is little, the pressure loss is little, the temperature decreases for a short time, can the scavenge pipe, for the gate valve, has longe-lived advantage, and is troublesome for self sealss such as ball valve, has the advantage that can force to close. And all internals can all be taken out and the installation from valve body 1 upper portion, this application valve is installed behind the pipeline, can maintain and maintain under the condition of not dismantling the valve to shorten maintenance duration greatly.

Second, based on a preferred scheme of first embodiment, support 3 is inside to be provided with splines 11, has seted up in the middle of splines 11 and has stopped changeing hole 12, and valve rod 4 is through stopping changeing

hole

12 and 11 fixed connection that splines, and the recess 14 has all been seted up on the both sides of

splines

11, and 3 internal surface both sides of support are provided with support slide rail 15, and splines 11 and pass through recess 14 sliding connection on support slide rail 15 surfaces. The shape of the rotation stopping hole 12 in this embodiment is not limited, and may be rectangular, the fixed valve rod 4 is clamped through the rotation stopping hole 12, and the groove 14 on both sides of the rotation stopping plate 11 slides on the surface of the bracket slide rail 15 to form a sliding rotation stopping system; and then the stability of the valve rod 4 during the lifting action is ensured.

In a third embodiment, based on a preferable scheme of the first embodiment, contact surfaces between the valve flap 5 and the cantilever 6 are a spherical surface and a cylindrical hole surface respectively, and the spherical surface and the cylindrical hole surface are matched to realize sealing connection. Therefore, when the valve clack 5 and the cantilever 6 move, the position of a sealing surface between the valve clack 5 and the cantilever 6 can be automatically adjusted; hard alloy is welded on the contact surface between the valve clack 5 and the cantilever 6; therefore, the valve is ensured to be small in abrasion loss after being opened and closed for many times, and the service life of the valve is prolonged.

In the fourth embodiment, based on a preferable scheme of the first embodiment, a positioning pin 24 is fittingly installed on a side surface of the cantilever frame 8; the cantilever frame 8 is fixedly arranged on the valve body 1 through a positioning pin 24 and is pressed and fixed through the valve cover 2; therefore, when the accumulated error is compensated, an accurate mounting point can be provided for later maintenance of the valve.

Fifth, based on a preferable scheme of the first embodiment, a second sliding bearing 18 is installed in the middle of the valve cover 2, and the valve rod 4 passes through the second sliding bearing 18 and is movably connected with the second sliding bearing 18; the packing 19 is filled above the second sliding bearing 18, the packing pressing sleeve 20 is arranged above the packing 19, the packing pressing plate 21 is arranged above the packing pressing sleeve 20, the upper surface of the valve cover 2 is fixedly installed on the packing pressing plate 21 through the stud 22, and the belleville spring 23 is sleeved between the packing pressing plate 21 and the stud 22. The second sliding bearing 18 provides a second support for the valve rod 4, and the first sliding bearing 13 is matched to determine the motion track of the valve rod 4 so as to protect the packing 19 from lateral force.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. A roll-over stop valve, includes valve body (1), its characterized in that: the valve comprises a valve body (1), a valve cover (2) is fixedly mounted above the valve body (1), a support (3) is fixedly mounted on the valve cover (2), a valve rod (4) is movably connected in the middle of the support (3), the end part of the valve rod (4) penetrates through the valve cover (2) and is movably connected with a valve clack (5), the side surface of the valve clack (5) is connected with one end of a cantilever (6), the other end of the cantilever (6) is movably connected onto a cantilever frame (8) through a rotating shaft (7), the cantilever frame (8) is fixedly mounted at a flange above the valve body (1), a first sliding bearing (13) is fixedly mounted in the middle of the cantilever frame (8), and the valve rod (4) penetrates through the first sliding bearing (13) and is movably connected with;

the valve body (1) inner chamber lower surface is provided with curved surface groove (9), a side surface of curved surface groove (9) sets up to the plane, the one end of valve clack (5) side surface contacts with the plane of curved surface groove (9) one side, the below of cantilever (6) is provided with sealed piece (10), the other end of valve clack (5) side surface contacts with the side surface of sealed piece (10), sealed piece (10) side surface forms sealed vice with the plane of curved surface groove (9) one side, sealed vice runner center with valve body (1) inner chamber forms an angle.

2. A roll-over shut-off valve as claimed in claim 1, wherein: the improved valve is characterized in that a rotation stopping plate (11) is arranged inside the support (3), a rotation stopping hole (12) is formed in the middle of the rotation stopping plate (11), the valve rod (4) is fixedly connected with the rotation stopping plate (11) through the rotation stopping hole (12), grooves (14) are formed in two sides of the rotation stopping plate (11), support sliding rails (15) are arranged on two sides of the inner surface of the support (3), and the rotation stopping plate (11) is connected to the surfaces of the support sliding rails (15) in a sliding mode through the grooves (14).

3. A roll-over shut-off valve as claimed in claim 1, wherein: the contact surface between the valve clack (5) and the cantilever (6) is a spherical surface and a cylindrical hole surface respectively, and the spherical surface and the cylindrical hole surface are matched to realize sealing connection.

4. A roll-over shut-off valve according to claim 3, wherein: and hard alloy is welded on the contact surface between the valve clack (5) and the cantilever (6).

5. A roll-over shut-off valve as claimed in claim 1, wherein: waist-shaped hole (16) have been seted up to the tip of valve rod (4), valve clack (5) side surface fixed mounting has cylindrical pin axle (17), valve clack (5) are through cylindrical pin axle (17) sliding connection in waist-shaped hole (16).

6. A roll-over shut-off valve as claimed in claim 1, wherein: and a positioning pin (24) is arranged on the side surface of the cantilever frame (8) in a matching way, and the cantilever frame (8) is fixedly arranged on the valve body (1) through the positioning pin (24) and is pressed and fixed through the valve cover (2).

7. A roll-over shut-off valve as claimed in claim 1, wherein: a second sliding bearing (18) is mounted in the middle of the valve cover (2), and the valve rod (4) penetrates through the second sliding bearing (18) and is movably connected with the second sliding bearing (18); the packing pressing device is characterized in that a packing (19) is filled above the second sliding bearing (18), a packing pressing sleeve (20) is arranged above the packing (19), a packing pressing plate (21) is arranged above the packing pressing sleeve (20), the upper surface of the valve cover (2) is fixedly installed on the packing pressing plate (21) through a stud (22), and a belleville spring (23) is sleeved between the packing pressing plate (21) and the stud (22).