CN214466208U

CN214466208U - Gate valve

Info

Publication number: CN214466208U
Application number: CN202120403334.9U
Authority: CN
Inventors: 杨欣梦
Original assignee: Shanghai Yaao Valve Co ltd
Current assignee: Shanghai Yaao Valve Co ltd
Priority date: 2021-02-23
Filing date: 2021-02-23
Publication date: 2021-10-22
Anticipated expiration: 2031-02-23

Abstract

The utility model relates to a gate valve, relate to the technical field of valves, its technical scheme mainly includes the disk seat, the valve gap, the flashboard, valve rod and hand wheel, be provided with the passageway that supplies the medium circulation in the disk seat, the setting of disk seat is run through at passageway length direction both ends, the valve gap lid is established to disk seat upper end department and is enclosed to close and form airtight setting and with the cavity of passageway intercommunication, the flashboard goes up and down to slide in the cavity in order to be used for sealing up the setting to the passageway, valve rod lower extreme and flashboard fixed connection, the valve rod is cylindric setting and goes up and down to slide on the valve gap, valve rod upper end and hand wheel threaded connection, the hand wheel rotates and sets up on the valve gap, one section cover that lies in the cavity on the valve rod is equipped with the bellows, bellows lower extreme is fixed with valve rod sealing connection, bellows upper end and disk seat upper end open-ended lateral wall sealing connection set up. This application has the effect that improves the leakproofness of gate valve.

Description

Gate valve

Technical Field

The application relates to the technical field of valves, in particular to a gate valve.

Background

At present, valves are pipe fittings for opening and closing pipes, controlling flow direction, regulating and controlling parameters (temperature, pressure and flow) of a conveying medium, and can be classified into gate valves, check valves, regulating valves and the like according to their functions. The gate valve is a shutter, the movement direction of the shutter is vertical to the fluid direction, and the gate valve can only be fully opened and fully closed and cannot be adjusted and throttled. Gate valves are sealed by the contact of the valve seat and the gate plate, and the sealing surface is usually bead-welded with a metallic material to increase wear resistance.

Traditional stop valve mainly includes valve body, flashboard, valve rod and hand wheel, and the valve body includes disk seat and valve gap, drives the valve rod through rotating the hand wheel and drives the flashboard and go up and down and carry out the effect closed or opened to the passageway in the valve body, but sealing connection between the disk seat of traditional gate valve and the valve gap seals through the sealing washer, because the circumstances such as ageing, damage appear after the sealing washer is used for a long time, leads to the leakproofness of gate valve poor, consequently needs the improvement.

SUMMERY OF THE UTILITY MODEL

In order to improve the leakproofness of gate valve, this application provides a gate valve.

The application provides a gate valve adopts following technical scheme:

the utility model provides a gate valve, includes disk seat, valve gap, flashboard, valve rod and hand wheel, be provided with the passageway that supplies the medium circulation in the disk seat, the disk seat encloses with the valve gap and closes the cavity that forms airtight setting and communicate with the passageway, the flashboard goes up and down to slide in the cavity in order to be used for sealing up the setting to the passageway, the valve rod lower extreme is connected with the flashboard, the valve rod goes up and down to slide on the disk seat, valve rod upper end and hand wheel threaded connection, the hand wheel rotates and sets up on the valve gap, the cover is equipped with the bellows on the valve rod, the bellows lower extreme is fixed with valve rod sealing connection, bellows upper end and disk seat upper end open-ended lateral wall sealing connection set up.

Through adopting above-mentioned technical scheme, establish to the valve rod through being provided with the bellows cover in the valve body on, bellows lower extreme and valve rod sealing connection, bellows upper end and disk seat sealing connection, when sealing connection between disk seat and valve gap is unstable, if there is impurity to get into the cavity from the gap between valve gap and the disk seat in, utilize the setting of bellows, both satisfied the demand that the valve rod goes up and down, the setting of bellows will be intercepted the medium that gets into in the valve body simultaneously, and then realize improving the effect of gate valve leakproofness.

Preferably, the upper end of the valve cover is provided with a packing groove which is coaxial with the valve rod, low-leakage packing is filled between the packing groove and the valve rod, a packing pressing sleeve which is pressed to the upper side of the low-leakage packing is arranged at an opening at the upper end of the packing groove, and the packing pressing sleeve is sleeved on the valve rod.

Through adopting above-mentioned technical scheme, the packing groove, low leakage filler and packing press the cover to realize carrying out sealing connection to the gap department between valve rod and the valve gap, further improve the leakproofness of gate valve.

Preferably, the packing pressing plate is further provided with a packing pressing plate, the packing pressing plate is rotatably connected with an eyelet bolt, the valve cover is provided with a support pin inserted into an eyelet of the eyelet bolt, and one end, far away from the support pin, of the eyelet bolt is in threaded connection with an adjusting nut positioned on the upper side of the packing pressing plate.

By adopting the technical scheme, the packing pressing sleeve is further pressed, connected and fixed through the packing pressing plate, the swing bolt and the support pin.

Preferably, the upper end of the packing pressing sleeve is provided with an arc-shaped bulge, and the lower end face of the packing pressing plate is provided with an arc-shaped groove for the arc-shaped bulge to be embedded.

By adopting the technical scheme, the connection stability between the packing pressing plate and the packing pressing sleeve is further improved by utilizing the arc-shaped bulge on the packing pressing sleeve and the arc-shaped groove of the packing pressing plate.

Preferably, the valve rod is provided with a mounting ring for mounting the lower end of the corrugated pipe, the lower end of the corrugated pipe is mounted and abutted to the mounting ring and is in sealing connection with the mounting ring, a cushion block is further arranged at the joint of the valve seat and the valve cover and sleeved on the valve rod in a sliding manner, flange gaskets are arranged on two sides of the cushion block in the thickness direction, and the corrugated pipe is in sealing connection with the lower end face of the cushion block.

Through adopting above-mentioned technical scheme, the setting of collar and cushion will be convenient for realize that the bellows is fixed with being connected between valve rod and the disk seat.

Preferably, still be provided with the support arm that is located on the valve rod week side on the valve bonnet, the support arm upper end is rotated and is provided with valve-stem nut, valve-stem nut and valve rod threaded connection, the hand wheel is coaxial to be fixed to valve-stem nut on.

Through adopting above-mentioned technical scheme, the effect that the rotation between realization hand wheel and the valve gap is connected and drive the valve rod and go up and down will be convenient for to support arm and valve rod nut's setting.

Preferably, the valve-stem nut upper end cover is established and is supported tight board, support tight board and support tightly to the hand wheel upside, be provided with the spacing step that the hand wheel lower extreme butt of being convenient for was installed on the valve-stem nut lateral wall, threaded connection has lock nut on the valve-stem nut outer wall, lock nut butt is fixed to the valve-stem nut in order to be used for locking the hand wheel to the tight board upside.

Through adopting above-mentioned technical scheme, support tight board, spacing step and lock nut's setting so that realize pressing from both sides the hand wheel clamp tightly fixed to valve-stem nut on, simple structure, the simple installation.

Preferably, the upper end of the valve rod extends out of the upper end of the valve rod nut, the extending end of the valve rod is further coaxially provided with a limiting ring, and when the flashboard descends to cut off the channel completely, the limiting ring is abutted to the upper end of the valve rod nut.

Through adopting above-mentioned technical scheme, the setting of spacing ring will restrict the valve rod and excessively move down and cause the condition of damage to the flashboard.

In summary, the present application includes at least one of the following beneficial technical effects:

the corrugated pipe sleeved on the valve rod is arranged in the valve seat, and impurities entering the valve seat are collected by the corrugated pipe, so that the impurities can be reduced to be doped into a medium, and the effect of improving the sealing property of the gate valve is further realized;

through be provided with the packing groove on the valve gap, low leakage packing and gland to seal the setting to the junction between valve rod and the valve gap, the leakproofness of improvement gate valve that will further.

Drawings

Fig. 1 is a schematic view of an overall structure of a gate valve according to an embodiment of the present invention.

Reference numerals: 1. a valve seat; 2. a valve cover; 3. a shutter plate; 4. a valve stem; 5. a hand wheel; 6. a channel; 7. a cavity; 8. a bellows; 9. a mounting ring; 10. cushion blocks; 11. a flange gasket; 12. a packing groove; 13. a low leakage filler; 14. pressing and sleeving the filler; 15. a packing press plate; 16. an eye bolt; 17. a bracket pin; 18. adjusting the nut; 19. an arc-shaped bulge; 20. an arc-shaped groove; 21. a support arm; 22. a valve stem nut; 23. a propping plate; 24. a limiting step; 25. locking the nut; 26. a limit ring.

Detailed Description

The present application is described in further detail below with reference to FIG. 1.

The embodiment of the application discloses a gate valve. Referring to fig. 1, the gate valve includes disk seat 1, valve gap 2, flashboard 3, valve rod 4 and hand wheel 5, be provided with the passageway 6 that supplies the medium circulation in the

disk seat

1, 6 length direction both ends of passageway run through the setting of

disk seat

1, 2 lids of valve gap are established to 1 upper end department of disk seat and are enclosed to close and form airtight setting and with the cavity 7 of passageway 6 intercommunication, 3 lifts and slides in cavity 7 and in order to be used for carrying out sealed setting to

passageway

6, 4 lower extremes of valve rod and 3 fixed connection of flashboard, valve rod 4 is cylindric setting and lifts and slides on

valve gap

2, 4 upper ends of valve rod and 5 threaded connection of hand wheel, 5 rotations of hand wheel set up on valve gap 2, one section cover that lies in cavity 7 on valve rod 4 is equipped with

bellows

8, 8 lower extremes and 4 sealing connection of valve rod are fixed, 8 upper ends of bellows and 1 upper end open-ended lateral wall sealing connection of disk seat set up.

Welded fastening has the collar 9 that is used for installing 8 lower extremes of bellows on the valve rod 4 outer wall, and 8 lower extremes of bellows install butt joint to collar 9 on and through sealed gluey bonding fixed to collar 9, and the junction of disk seat 1 and valve gap 2 still is provided with the cushion 10 that the cover of sliding established to valve rod 4, all is provided with flange gasket 11 on the both sides of cushion 10 thickness direction, terminal surface under 8 sealing connection of bellows to cushion 10.

The upper end of the valve cover 2 is provided with a packing groove 12 which is coaxial with the valve rod 4, low-leakage packing 13 is filled between the packing groove 12 and the valve rod 4, an opening at the upper end of the packing groove 12 is provided with a packing pressing sleeve 14 which is pressed to the upper side of the low-leakage packing 13, the packing pressing sleeve 14 is sleeved on the valve rod 4, a packing pressing plate 15 is further pressed on the packing pressing plate 15, the packing pressing plate 15 is rotatably connected with an eyelet bolt 16 which is positioned on the peripheral side of the valve rod 4, the valve cover 2 is provided with a support pin 17 which is inserted and arranged on an eyelet of the eyelet bolt 16, one end of the eyelet bolt 16, which is far away from the support pin 17, is in threaded connection with an adjusting nut 18 which is positioned on the upper side of the packing pressing plate 15, and under the fixing action of the support pin 17, the pressing effect of the packing pressing sleeve 14 is realized by rotating the adjusting nut 18 and applying downward pressure to the packing pressing plate 15.

Further, the upper end of the packing pressing sleeve 14 is provided with an arc-shaped protrusion 19, the lower end face of the packing pressing plate 15 is provided with an arc-shaped groove 20 for the arc-shaped protrusion 19 to be embedded, and the connection stability between the packing pressing plate 15 and the packing pressing sleeve 14 is further improved by utilizing the limiting effect of the arc-shaped protrusion 19 and the arc-shaped groove 20.

Still install on the valve gap 2 and be fixed with the support arm 21 that is located valve rod 4 week side, support arm 21 is provided with two in this embodiment, two support arms 21 all are bow-shaped setting (support arm 21 is the conventional technique in this field, not shown in the figure), two support arm 21 upper ends are connected fixedly and support arm 21 upper end is rotated and is installed stem nut 22, stem nut 22 and valve rod 4 upper end threaded connection, stem nut 22 upper end cover is equipped with supports tight board 23, support tight board 23 and support tightly to 5 upsides of hand wheel, set up the spacing step 24 of 5 lower extreme butt installations of hand wheel of being convenient for on the stem nut 22 lateral wall, threaded connection has lock nut 25 on the stem nut 22 outer wall, exert decurrent pressure through rotatory lock nut 25 and to supporting board 23, and then realize fixing the effect on the valve rod 4 nut with hand wheel 5 locking.

Further, the upper end of the valve rod 4 extends to the upper end of the nut of the valve rod 4, a limit ring 26 is coaxially fixed on the extending end of the valve rod 4, and when the flashboard 3 descends to cut off the channel 6 completely, the limit ring 26 abuts against the upper end of the nut of the valve rod 4.

The implementation principle of a gate valve of the embodiment of the application is as follows: install flashboard 3 to 4 lower extremes of valve rod, establish 8 covers of bellows to the valve rod 4 on and the lower extreme is connected fixedly to collar 9, establish 10 covers of cushion to the valve rod 4 on and with valve clack bellows 8 sealing connection fixed, install valve rod 4 to disk seat 1 in, and install seal ring to 10 both sides of cushion, install valve gap 2 to disk seat 1 on, install low leakage filler 13 to the packing groove 12 in, install fixed with packing pressure sleeve 14 and packing clamp plate 15, install valve rod nut 22 to support arm 21 on, install fixed to the valve rod 4 nut with hand wheel 5.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A gate valve, characterized in that: comprises a valve seat (1), a valve cover (2), a flashboard (3), a valve rod (4) and a hand wheel (5), a channel (6) for medium to flow is arranged in the valve seat (1), the valve seat (1) and the valve cover (2) are enclosed to form a cavity (7) which is arranged in a sealing way and is communicated with the channel (6), the gate plate (3) is lifted and glided in the cavity (7) to be used for sealing the channel (6), the lower end of the valve rod (4) is connected with the flashboard (3), the valve rod (4) is lifted and slid on the valve seat (1), the upper end of the valve rod (4) is in threaded connection with a hand wheel (5), the hand wheel (5) is rotationally arranged on the valve cover (2), the valve rod (4) is sleeved with a corrugated pipe (8), the lower end of the corrugated pipe (8) is fixedly connected with the valve rod (4) in a sealing way, the upper end of the corrugated pipe (8) is hermetically connected with the side wall of the upper opening of the valve seat (1).

2. The gate valve of claim 1, wherein: the valve cap is characterized in that a packing groove (12) which is coaxial with the valve rod (4) is formed in the upper end of the valve cap (2), low-leakage packing (13) is filled between the packing groove (12) and the valve rod (4), a packing pressing sleeve (14) which is pressed to the upper side of the low-leakage packing (13) is arranged at an opening in the upper end of the packing groove (12), and the packing pressing sleeve (14) is sleeved on the valve rod (4).

3. The gate valve of claim 2, wherein: the novel valve is characterized in that a packing pressure plate (15) is further arranged on the packing pressure sleeve (14) in a pressing mode, an eyelet bolt (16) is connected to the packing pressure plate (15) in a rotating mode, a support pin (17) inserted into an eyelet of the eyelet bolt (16) is arranged on the valve cover (2), and an adjusting nut (18) located on the upper side of the packing pressure plate (15) is connected to one end, far away from the support pin (17), of the eyelet bolt (16) in a threaded mode.

4. The gate valve of claim 3, wherein: the upper end of the packing pressing sleeve (14) is provided with an arc-shaped bulge (19), and the lower end face of the packing pressing plate (15) is provided with an arc-shaped groove (20) for embedding the arc-shaped bulge (19).

5. The gate valve of claim 1, wherein: be provided with on valve rod (4) and be used for installing mounting ring (9) of bellows (8) lower extreme, bellows (8) lower extreme installation butt joint on mounting ring (9) and with mounting ring (9) sealing connection, the junction of disk seat (1) and valve gap (2) still is provided with slides and overlaps and establish cushion (10) to valve rod (4), all be provided with flange packing ring (11) on the both sides of cushion (10) thickness direction, terminal surface under bellows (8) sealing connection to cushion (10).

6. The gate valve of claim 1, wherein: still be provided with on valve gap (2) and be located support arm (21) on valve rod (4) week side, support arm (21) upper end is rotated and is provided with valve-stem nut (22), valve-stem nut (22) and valve rod (4) threaded connection, hand wheel (5) coaxial fixation is to valve-stem nut (22) on.

7. The gate valve of claim 6, wherein: valve-stem nut (22) upper end cover is established and is supported tight board (23), support tight board (23) and support tightly to hand wheel (5) upside, be provided with spacing step (24) that be convenient for hand wheel (5) lower extreme butt installation on valve-stem nut (22) lateral wall, threaded connection has lock nut (25) on valve-stem nut (22) outer wall, lock nut (25) butt is fixed to valve rod (4) nut to supporting tight board (23) upside in order to be used for with hand wheel (5) locking.

8. The gate valve of claim 7, wherein: valve rod (4) upper end is stretched out to valve-stem nut (22) upper end, the stretching out of valve rod (4) is served and still is coaxial to be provided with spacing ring (26), when flashboard (3) descend to cut off passageway (6) completely, spacing ring (26) butt to valve-stem nut (22) upper end.