CN214838417U

CN214838417U - Stop valve

Info

Publication number: CN214838417U
Application number: CN202120403332.XU
Authority: CN
Inventors: 杨鑫城
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: 2021-11-23
Anticipated expiration: 2031-02-23

Abstract

The utility model relates to a stop valve, relate to valve technical field, its technical scheme mainly includes the valve body, the valve clack, valve rod and hand wheel, be provided with the passageway that supplies the medium circulation in the valve body, the valve rod goes up and down to set up in the valve body and be cylindric setting, the valve clack sets up in the valve rod lower extreme in order to be used for opening and close the passageway, the valve rod upper end stretches out the valve body outside and with hand wheel threaded connection, the hand wheel rotates and sets up on the valve body, be provided with the gag lever post that is located the valve body outside on the valve rod, the gag lever post is fixed to the valve body on, be provided with upper limit portion and lower limit portion of arranging along its axis direction on the valve rod, upper limit portion sets up on one side that the valve clack was kept away from to lower limit portion, when the supreme spacing portion of gag lever post butt, descend to the valve clack terminal point and with the valve body in the passageway by the setting. This application has the effect of the damage of stop valve internal component when reducing to open and close.

Description

Stop valve

Technical Field

The application relates to the technical field of valves, in particular to a stop 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 shut-off valves, check valves, regulating valves and the like according to their functions.

Traditional stop valve mainly includes the valve body, the valve clack, valve rod and hand wheel, drives the valve rod through rotating the hand wheel and drives the valve clack and go up and down and carry out the effect closed or opened to the passageway in the valve body, and because the valve clack is located the valve body, when the staff was opened and close at adjusting valve, it is difficult to observe whether the valve clack closes the valve tightly, can only distinguish according to the degree of support of valve clack and valve body, but, when supporting tight valve clack, will cause the damage to valve clack and valve rod hard, consequently need improve.

SUMMERY OF THE UTILITY MODEL

In order to reduce the damage of stop valve internal component when opening and close, this application provides a stop valve.

The application provides a stop valve adopts following technical scheme:

the utility model provides a stop valve, includes valve body, valve clack, valve rod and hand wheel, be provided with the passageway that supplies the medium to flow in the valve body, the valve clack goes up and down to open and close with being used for the passageway in the valve body, valve rod lower extreme and valve clack are connected and upper end and hand wheel threaded connection, the valve rod slides with the valve body and is connected, be provided with the gag lever post that is located the valve body outside on the valve rod, be provided with the last spacing portion and the lower spacing portion of arranging along its axis direction on the valve rod, go up the spacing portion and set up on one side that the valve clack was kept away from to lower spacing portion, when the supreme spacing portion of gag lever post butt, the valve clack descends to the terminal point and ends the setting with the passageway in the valve body.

Through adopting above-mentioned technical scheme, through be provided with the gag lever post on the valve body to be provided with spacing portion and lower spacing portion on the valve rod, utilize the restriction of spacing portion and lower spacing portion to limit the stroke that slides of valve clack, the staff can confirm whether the valve clack is with the end setting of passageway with the help of the butt effect of gag lever post and upper spacing portion, so set up the condition that can reduce because of excessively screwing and lead to when opening and close stop valve internal component damage.

Preferably, a sliding groove is formed in one side, close to the limiting rod, of the valve rod, the limiting rod slides in the sliding groove along the axis direction of the valve rod, and an upper limiting part and a lower limiting part are respectively arranged on two side walls of the sliding groove along the axis direction of the valve rod.

Through adopting above-mentioned technical scheme, the inslot that slides sets up and slides the gag lever post in the inslot that slides to in the spacing effect of spacing portion and lower spacing portion on realizing gag lever post and the valve rod, also can restrict the condition that the rotation takes place for the valve rod simultaneously, further improve the stability that the valve clack goes up and down.

Preferably, the limiting rod is arranged in a cylindrical shape.

Through adopting above-mentioned technical scheme, be cylindricly through setting up the gag lever post, utilize the setting of its arcwall face to improve the gag lever post in the stability of sliding of the inslot that slides, reduce the condition of gag lever post and valve rod joint.

Preferably, springs are arranged on two opposite sides of the upper limit portion and the lower limit portion, one end of each spring is connected with the valve rod, and the other end of each spring can be abutted against the limit rod.

Through adopting above-mentioned technical scheme, utilize the cushioning effect of spring, when the valve clack is about to with the disk seat butt, the impact wear of the reducible valve clack of the cushioning effect of spring and disk seat.

Preferably, the valve rod lower extreme is coaxial to be provided with the connection pad, the connection pad external diameter is greater than valve rod lower extreme external diameter, the valve clack upper end is provided with the T type groove that supplies the installation of valve rod lower extreme, the upper end intercommunication setting of T type groove and valve clack.

Through adopting above-mentioned technical scheme, the setting in connection pad and T type groove utilizes the limiting displacement between connection pad and the valve clack, and the connection of the valve rod valve clack of will being convenient for is fixed.

Preferably, the valve body includes disk seat and valve gap, disk seat and valve gap inclusion form inclosed cavity, the valve clack slides in having the cavity, the valve gap setting is stretched out to the valve rod upper end, the packing groove of setting coaxial with the valve rod is seted up to the valve gap upper end, be provided with the low leakage stopping that is located on the valve rod week side in the packing groove, packing groove upper end compresses tightly is provided with the packing and presses the cover, be provided with the packing clamp plate that compresses tightly to packing and press the cover upside on the disk seat.

By adopting the technical scheme, the joint between the valve cover and the valve rod is sealed by utilizing the packing groove, the low-leakage packing, the packing pressing sleeve and the packing pressing plate, so that the connection sealing property between the valve body and the valve rod is improved.

Preferably, the valve seat is connected with the valve cover through a flange, and a flange gasket used for sealing the connection position is arranged between the valve seat and the valve cover.

Through adopting above-mentioned technical scheme, utilize the good sealing performance of flange packing ring, will multiplicable valve gap and the valve body between be connected the leakproofness.

Preferably, a corrugated pipe is arranged in the valve seat, the corrugated pipe is sleeved on the valve rod, the lower end of the corrugated pipe is connected with the valve rod in a sealing mode, and the upper end of the corrugated pipe is connected with the side wall of the upper port of the valve seat in a sealing mode.

Through adopting above-mentioned technical scheme, when impurity entered into the cavity from the gap between valve gap and the valve body, utilized the setting of bellows, the medium will enter into in the bellows and receive and put, so set up and lead to the fact the pollution to the fluid medium with reducible impurity entering into the cavity.

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

the valve body is provided with the limiting rod, the valve rod is provided with the upper limiting part and the lower limiting part, and the situation of descending transition of the valve clack is reduced by utilizing the abutting action of the limiting rod and the upper limiting part;

the valve seat is internally provided with the corrugated pipe sleeved on the valve rod, so that the sealing performance between the valve seat and the valve cover is further improved.

Drawings

Fig. 1 is an overall structural schematic diagram of a stop valve according to an embodiment of the present application.

Reference numerals: 1. a valve body; 101. a valve seat; 102. a valve cover; 2. a valve flap; 3. a valve stem; 4. a hand wheel; 5. a channel; 6. a limiting rod; 7. an upper limit portion; 8. a lower limiting part; 9. a cavity; 10. a flange gasket; 11. a connecting disc; 12. a T-shaped groove; 13. a bellows; 14. a packing groove; 15. low leakage filler; 16. pressing and sleeving the filler; 17. a packing press plate; 18. mounting an arm; 19. a bearing; 20. an internal thread sleeve; 21. a sliding groove; 22. a spring; 23. and installing a gasket.

Detailed Description

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

The embodiment of the application discloses a stop valve. Referring to fig. 1, the stop valve includes valve body 1, valve clack 2, valve rod 3 and hand wheel 4, be provided with the passageway 5 that supplies the medium circulation in the valve body 1, valve rod 3 goes up and down to set up in valve body 1 and be cylindric setting, valve clack 2 sets up in valve rod 3 lower extreme in order to be used for opening and close passageway 5, valve rod 3 upper end stretch out the valve body 1 outside and with hand wheel 4 threaded connection, hand wheel 4 rotates and sets up on valve body 1, be provided with the gag lever post 6 that is located the valve body 1 outside on the valve rod 3, gag lever post 6 is fixed to valve body 1 on, be provided with upper limit portion 7 and lower spacing portion 8 of arranging along its axis direction on the valve rod 3, upper limit portion 7 sets up on one side that valve clack 2 was kept away from to lower spacing portion 8, when the supreme spacing portion 7 of gag lever post 6 butt, valve clack 2 descends to the terminal point and ends the setting with passageway 5 in the valve body 1.

The valve body 1 comprises a valve seat 101 and a valve cover 102, the channel 5 is arranged in the valve seat 101 and used for circulating fluid media, the valve cover 102 and the valve seat 101 form a closed cavity 9 in an enclosing mode, and the cavity 9 is communicated with the channel 5. The valve seat 101 and the valve cover 102 are fixed by flange connection, and a flange gasket 10 for sealing the connection is installed between the valve seat 101 and the valve cover 102.

The lower extreme of valve rod 3 is coaxial to be fixed with connection pad 11, and the external diameter of connection pad 11 is greater than the 3 lower extreme external diameters of valve rod, and the T type groove 12 that supplies the 3 lower extreme installations of valve rod is seted up to valve clack 2 upper end, and T type groove 12 sets up with the upper end intercommunication of valve clack 2, and valve clack 2 is formed by the split concatenation that two pile set up, and two split enclosures close and form T type groove 12, and the setting of connection pad 11 and T type groove 12 will be convenient for valve clack 2 and valve rod 3 be connected fixedly.

Still be provided with the bellows 13 that the cover was established to valve rod 3 in the cavity 9, bellows 13 lower extreme inside wall is fixed through sealed gluey bonding with the valve rod 3 lateral wall, still is provided with an installation packing ring 23 between disk seat 101 and the valve gap 102, has all placed flange packing ring 10 on the installation packing ring 23 thickness direction both sides, and bellows 13 upper end outer wall is fixed through sealed gluey bonding with the inside wall of installation packing ring 23.

The valve rod 3 is connected with the valve seat 101 in a sliding mode, the upper end of the valve rod 3 extends out of one side of the upper end of the valve seat 101, the upper end of the valve cover 102 is provided with a packing groove 14 which is coaxial with the valve rod 3, low-leakage packing 15 located on the peripheral side of the valve rod 3 is filled in the packing groove 14, a packing pressing sleeve 16 used for fixing the low-leakage packing 15 is arranged at the upper end of the packing groove 14 in a pressing mode, a packing pressing plate 17 pressed to the upper side of the packing pressing sleeve 16 is installed on the valve seat 101, and the packing pressing plate 17 is locked and fixed to the valve seat 101 through bolts and nuts.

Still be provided with the installation arm 18 that is used for rotating installation hand wheel 4 on the valve holder 101, installation arm 18 is bow-shaped form and sets up on valve rod 3 one side, and installation arm 18 lower extreme is connected fixedly with valve holder 101, and installation arm 18 upper end is fixed with bearing 19, and the bearing 19 endotheca is equipped with internal thread cover 20, and threaded connection is in internal thread cover 20 in valve rod 3 upper end, and internal thread cover 20 upper end is connected fixedly with hand wheel 4.

A sliding groove 21 is formed in one side, close to the mounting arm 18, of a section, between the upper side of the packing pressing plate 17 and the upper end of the mounting arm 18, of the valve rod 3, the length direction of the sliding groove 21 is arranged along the axis direction of the valve rod 3, the upper limiting part 7 and the lower limiting part 8 are two side walls in the sliding groove 21 along the axis direction of the valve rod 3 respectively, and springs 22 are fixed on two opposite sides of the upper limiting part 7 and the lower limiting part 8; the gag lever post 6 is cylindric setting, and 6 levels of gag lever post set up and wherein one end have installation arm 18 to connect fixedly, and the gag lever post 6 is kept away from the one end of installation arm 18 and is slided in sliding groove 21, and gag lever post 6 slides between two springs 22, slides down at valve rod 3 until gag lever post 6 when with the spring 22 complete compression of upper limit portion 7, and valve clack 2 just moves to ending with passageway 5.

The implementation principle of a stop valve of the embodiment of the application is as follows: when the stop valve needs to be closed, the hand wheel 4 is rotated to drive the valve rod 3 to drive the valve clack 2 to slide downwards, a worker can observe whether the limiting rod 6 completely compresses the spring 22 on one side of the upper limiting part 7, and when the limiting rod is completely compressed, the channel 5 is cut off by the valve clack 2; when the stop valve needs to be opened, the hand wheel 4 is rotated reversely to drive the valve rod 3 to drive the valve clack 2 to slide upwards, a worker can observe whether the limiting rod 6 completely compresses the spring 22 on one side of the lower limiting part 8, and when the limiting rod is completely compressed, the channel 5 is opened by the valve clack 2.

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. The utility model provides a stop valve, includes valve body (1), valve clack (2), valve rod (3) and hand wheel (4), be provided with in valve body (1) and supply passageway (5) that the medium flows, valve clack (2) go up and down and open and close with being used for passageway (5) in valve body (1), valve rod (3) lower extreme and valve clack (2) are connected and upper end and hand wheel (4) threaded connection, valve rod (3) slide with valve body (1) and are connected its characterized in that: be provided with gag lever post (6) that are located the valve body (1) outside on valve rod (3), be provided with upper limit portion (7) and lower limit portion (8) of arranging along its axis direction on valve rod (3), upper limit portion (7) set up on one side that valve clack (2) were kept away from to lower limit portion (8), when gag lever post (6) butt was last spacing portion (7), valve clack (2) descend to the terminal point and with valve body (1) inner channel (5) by the setting.

2. The shut-off valve of claim 1, wherein: be provided with groove (21) that slides on valve rod (3) on the one side that is close to gag lever post (6), gag lever post (6) slide in groove (21) that slides along the axis direction of valve rod (3), it is upper limit portion (7) and lower limit portion (8) respectively to follow the both sides wall of valve rod (3) axis direction in groove (21) that slides.

3. The shut-off valve of claim 2, wherein: the limiting rod (6) is arranged in a cylindrical shape.

4. The shut-off valve of claim 2, wherein: springs (22) are arranged on two opposite sides of the upper limiting portion (7) and the lower limiting portion (8), one end of each spring (22) is connected with the valve rod (3), and the other end of each spring (22) can be abutted to the limiting rod (6).

5. The shut-off valve of claim 1, wherein: valve rod (3) lower extreme coaxial connection pad (11) of being provided with, connection pad (11) external diameter is greater than valve rod (3) lower extreme external diameter, valve clack (2) upper end is provided with T type groove (12) that supply valve rod (3) lower extreme to install, the upper end intercommunication setting of T type groove (12) and valve clack (2).

6. The shut-off valve of claim 1, wherein: the valve body (1) comprises a valve seat (101) and a valve cover (102), the valve seat (101) and the valve cover (102) are wrapped to form a closed cavity (9), the valve clack (2) slides in the cavity (9), the upper end of the valve rod (3) extends out of the valve cover (102), a packing groove (14) which is coaxial with the valve rod (3) is formed in the upper end of the valve cover (102), low-leakage packing (15) which is located on the periphery of the valve rod (3) is arranged in the packing groove (14), a packing pressing sleeve (16) is arranged at the upper end of the packing groove (14) in a pressing mode, and a packing pressing plate (17) which is pressed to the upper side of the packing pressing sleeve (16) is arranged on the valve seat (101).

7. The shut-off valve of claim 6, wherein: the valve seat (101) is connected with the valve cover (102) in a flange mode, and a flange gasket (10) used for sealing the connection position is arranged between the valve seat (101) and the valve cover (102).

8. The shut-off valve of claim 7, wherein: be provided with bellows (13) in disk seat (101), bellows (13) cover is established to valve rod (3) on and bellows (13) lower extreme and valve rod (3) sealing connection, bellows (13) upper end and lateral wall and the last port lateral wall sealing connection of disk seat (101).