阅读说明：本技术 一种防锁死截止阀 (Anti-locking stop valve ) 是由 陆少华 刘朝霞 孙绪宝 于 2021-09-06 设计创作，主要内容包括：本发明涉及一种防锁死截止阀,其包括：阀体,具有进口流道、内腔、出口流道,所述进口流道与出口流道连通所述内腔；阀盖,盖设于所述阀体上端；阀杆,与所述阀盖螺纹连接,通过旋转所述阀杆,能够使所述阀杆沿竖直方向移动,所述阀杆上设置有棘齿；阀瓣,固定设置于所述阀杆下端,能够阻断所述进口流道与内腔；锁止杆,滑动设置于所述阀体上,能够与所述棘齿配合,当所述阀瓣移动至封闭所述进口流道时,能够限制所述阀杆旋转。本发明的优点有：通过阀瓣关闭状态和开启状态的压力差控制卡接块运动,使阀瓣完全关闭时,锁止杆从阀体向外伸出对阀杆进行限位,阀瓣开启时锁止杆通过拉绳驱动缩回阀体,无需其他控制元件,控制简单方便。(The invention relates to an anti-lock stop valve, which comprises: the valve body is provided with an inlet flow passage, an inner cavity and an outlet flow passage, and the inlet flow passage and the outlet flow passage are communicated with the inner cavity; the valve cover is arranged at the upper end of the valve body in a covering manner; the valve rod is in threaded connection with the valve cover, can move in the vertical direction by rotating the valve rod, and is provided with a ratchet; the valve clack is fixedly arranged at the lower end of the valve rod and can block the inlet flow passage and the inner cavity; and the locking rod is arranged on the valve body in a sliding mode and can be matched with the ratchet, and when the valve clack moves to close the inlet flow passage, the valve rod can be limited to rotate. The invention has the advantages that: the clamping block is controlled to move through the pressure difference between the closing state and the opening state of the valve clack, when the valve clack is completely closed, the locking rod extends outwards from the valve body to limit the valve rod, and when the valve clack is opened, the locking rod is driven to retract into the valve body through the pull rope, other control elements are not needed, and the valve is simple and convenient to control.)

1. An anti-lock shut-off valve, said anti-lock shut-off valve comprising:

the valve body is provided with an inlet flow passage, an inner cavity and an outlet flow passage, and the inlet flow passage and the outlet flow passage are communicated with the inner cavity;

the valve cover is arranged at the upper end of the valve body in a covering manner;

the valve rod is in threaded connection with the valve cover, can move in the vertical direction by rotating the valve rod, and is provided with a ratchet;

the valve clack is fixedly arranged at the lower end of the valve rod and can block the inlet flow passage and the inner cavity;

and the locking rod is arranged on the valve body in a sliding mode and can be matched with the ratchet, and when the valve clack moves to close the inlet flow passage, the valve rod can be limited to rotate.

2. The anti-lock stop valve according to claim 1, wherein a first receiving chamber is formed in the valve body, one end of the locking rod extends into the first receiving chamber, a first elastic member is disposed in the first receiving chamber, one end of the first elastic member abuts against an inner wall of the receiving chamber, and the other end of the first elastic member abuts against the locking rod, so that the locking rod extends into the inner chamber.

3. The anti-lock stop valve according to claim 2, wherein a dial plate is disposed on the valve rod, a slider is slidably disposed on the valve body and located on the side wall of the inner cavity, one end of the slider is connected to an end of the locking rod away from the valve rod through a pull rope, and when the valve rod moves upward, the slider is driven to move upward, so that the locking rod is driven to move away from the valve rod through the pull rope.

4. The anti-lock stop valve according to claim 3, wherein a limiting disc is arranged on the locking rod, a second accommodating cavity is further formed in the valve body, a clamping block is slidably arranged in the second accommodating cavity, the clamping block can extend into the first accommodating cavity and can abut against the limiting disc, and therefore the locking rod is limited to move towards the direction close to the valve rod.

5. The anti-lock stop valve according to claim 4, wherein a second elastic member is disposed in the second accommodating chamber, one end of the second elastic member abuts against the locking block, and the other end of the second elastic member abuts against an inner wall of the second accommodating chamber, so that the locking block extends into the first accommodating chamber.

6. The anti-lock stop valve of claim 5, wherein the clamping block divides the second receiving chamber into an upper chamber and a lower chamber, the valve body is provided with a first flow passage and a second flow passage, the first flow passage communicates the inlet flow passage and the upper chamber, the second flow passage communicates the inner chamber and the lower chamber, so that when the valve flap is closed, the medium in the inlet flow passage can enter the upper chamber to move the clamping block downward and leave the first receiving chamber.

7. The anti-lock stop valve of claim 5, wherein an inclined surface is arranged at the upper end of the clamping block, and when the locking rod moves away from the valve rod, the clamping block can abut against the inclined surface, so that the clamping block is pushed to leave the first accommodating cavity.

8. The anti-lock shut-off valve of claim 1, wherein a resilient sealing ring is adapted to be disposed on the underside of the valve flap, the resilient sealing ring being adapted to abut the valve body to seal the inlet channel from the interior chamber.

9. The anti-lock shut-off valve of claim 1, wherein a handle is provided at an upper end of the valve stem.

Technical Field

The invention relates to the field of pipeline valves, in particular to an anti-locking stop valve.

Background

The stop valve is also called as a stop valve, is one of the most widely used pipeline valves, is popular because the friction force between sealing surfaces is small in the opening and closing process, is durable, has small opening height, is easy to manufacture and convenient to maintain, and is suitable for medium and low pressure and high pressure systems. The stop valve makes the valve clack and the valve seat tightly fit by means of the pressure of the valve rod, so that the medium is prevented from flowing, and the sealing effect is achieved;

the conventional valve rod and the valve cover are in threaded connection, and in the using process, the threads and the valve cover are clamped due to excessive force; and when the stop valve is excessively closed by force, the rubber sealing ring is excessively deformed due to the pressure applied by the valve clack, so that the service life of the stop valve is influenced.

Disclosure of Invention

In view of the above, it is desirable to provide an anti-lock shut-off valve that addresses the above problems.

The invention discloses an anti-lock stop valve, which comprises: the valve body is provided with an inlet flow passage, an inner cavity and an outlet flow passage, and the inlet flow passage and the outlet flow passage are communicated with the inner cavity; the valve cover is arranged at the upper end of the valve body in a covering manner; the valve rod is in threaded connection with the valve cover, can move in the vertical direction by rotating the valve rod, and is provided with a ratchet; the valve clack is fixedly arranged at the lower end of the valve rod and can block the inlet flow passage and the inner cavity; and the locking rod is arranged on the valve body in a sliding mode and can be matched with the ratchet, and when the valve clack moves to close the inlet flow passage, the valve rod can be limited to rotate.

In one embodiment, a first accommodating cavity is formed in the valve body, one end of the locking rod extends into the first accommodating cavity, a first elastic piece is arranged in the first accommodating cavity, one end of the first elastic piece abuts against the inner wall of the accommodating cavity, and the other end of the first elastic piece abuts against the locking rod, so that the locking rod extends into the inner cavity.

In one embodiment, a dial plate is arranged on the valve rod, a slide block is slidably arranged on the side wall of the inner cavity of the valve body, one end of the slide block is connected with one end, away from the valve rod, of the locking rod through a pull rope, and when the valve rod moves upwards, the slide block can be driven to move upwards, so that the locking rod is driven to move away from the valve rod through the pull rope.

In one embodiment, a limiting disc is arranged on the locking rod, a second accommodating cavity is further formed in the valve body, a clamping block is slidably arranged in the second accommodating cavity, and the clamping block can extend into the first accommodating cavity and can abut against the limiting disc, so that the locking rod is limited to move towards the direction close to the valve rod.

In one embodiment, a second elastic member is disposed in the second accommodating cavity, one end of the second elastic member abuts against the clamping block, and the other end of the second elastic member abuts against the inner wall of the second accommodating cavity, so that the clamping block extends into the first accommodating cavity.

In one embodiment, the clamping block divides the second accommodating cavity into an upper cavity and a lower cavity, the valve body is provided with a first flow passage and a second flow passage, the first flow passage is communicated with the inlet flow passage and the upper cavity, and the second flow passage is communicated with the inner cavity and the lower cavity, so that when the valve clack is closed, a medium in the inlet flow passage can enter the upper cavity, and the clamping block moves downwards to leave the first accommodating cavity.

In one embodiment, an inclined surface is arranged at the upper end of the clamping block, and when the locking rod moves towards the direction away from the valve rod, the locking rod can abut against the inclined surface, so that the clamping block is pushed to leave the first accommodating cavity.

In one embodiment, an elastic sealing ring is arranged on the lower side of the valve clack and can be abutted with the valve body so as to seal the inlet flow passage and the inner cavity.

In one embodiment, the upper end of the valve rod is provided with a handle.

The invention has the advantages that:

1. the clamping block is controlled to move by the pressure difference between the closing state and the opening state of the valve clack, when the valve clack is completely closed, the locking rod extends outwards from the valve body to limit the valve rod, and when the valve clack is opened, the locking rod is driven by the pull rope to retract into the valve body, other control elements are not needed, and the control is simple and convenient;

2. through the cooperation of ratchet and locking pole on the valve rod, the valve rod can't be rotatory to closing the direction again when making the stop valve close completely, and the screw thread and the valve gap card that excessively lead to the valve rod hard when preventing to close the stop valve to and the valve clack excessively pushes down the elastic sealing circle that leads to and take place excessive deformation, thereby improved the life of stop valve.

Drawings

FIG. 1 is a cross-sectional view of the valve flap of the present invention in a closed state;

FIG. 2 is an enlarged view of a portion of the area I of FIG. 1 in accordance with the present invention;

FIG. 3 is a partial cross-sectional view taken in the direction A-A of FIG. 2 in accordance with the present invention;

FIG. 4 is a cross-sectional view of the valve flap of the present invention in an open state;

fig. 5 is a partial enlarged view of the area II in fig. 4 according to the present invention.

In the figure, a valve body 1, an inlet flow passage 11, an inner cavity 12, an outlet flow passage 13, a first accommodating cavity 14, an upper cavity 151, a lower cavity 152, a first flow passage 16, a second flow passage 17, a valve cover 2, a valve rod 3, a ratchet 31, a dial plate 32, a valve flap 4, an elastic sealing ring 41, a locking rod 5, a limiting plate 51, a first elastic piece 52, a sliding block 6, a pull rope 61, a clamping block 7, a second elastic piece 71, an inclined surface 72 and a handle 8.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.

It will be understood that when an element is referred to as being "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1 to 3, the present invention discloses an anti-lock stop valve, which includes: the valve body 1 is provided with an inlet flow passage 11, an inner cavity 12 and an outlet flow passage 13, wherein the inlet flow passage 11 is communicated with the inner cavity 12 through the outlet flow passage 13; the valve cover 2 is arranged at the upper end of the valve body 1 in a covering manner; a valve rod 3 in threaded connection with the bonnet 2, wherein the valve rod 3 can move in the vertical direction by rotating the valve rod 3, and the valve rod 3 is provided with a ratchet 31; the valve clack 4 is fixedly arranged at the lower end of the valve rod 3 and can block the inlet flow passage 11 and the inner cavity 12; and the locking rod 5 is arranged on the valve body 1 in a sliding mode, can be matched with the ratchet 31, and can limit the rotation of the valve rod 3 when the valve clack 4 moves to close the inlet flow channel 11.

It can be understood that, through setting up locking pole 5 for when valve clack 4 seals inlet flow channel 11, can joint and ratchet 31, thereby restriction valve rod 3 continues the forward rotation, in order to avoid operating personnel to exert oneself and excessively make the screw thread card between valve rod 3 and the valve gap 2 dead, and also can avoid valve clack 4 and valve body 1 excessive extrusion.

Preferably, a first accommodating cavity 14 is formed in the valve body 1, one end of the locking rod 5 extends into the first accommodating cavity 14, a first elastic piece 52 is arranged in the first accommodating cavity 14, one end of the first elastic piece 52 abuts against the inner wall of the accommodating cavity, and the other end of the first elastic piece 52 abuts against the locking rod 5, so that the locking rod 5 extends into the inner cavity 12.

It can be understood that, by providing the first elastic member 52, the snap rod can be automatically abutted against the valve rod 3 under the action of the first elastic member 52.

Preferably, be provided with dial disk 32 on the valve rod 3, lie in on the valve body 1 slide on the inner chamber 12 lateral wall and be provided with slider 6, 6 one end of slider pass through stay cord 61 with locking pole 5 is kept away from the one end of valve rod 3 is connected, works as when valve rod 3 upwards removes, can drive slider 6 upwards removes, and then drives through stay cord 61 locking pole 5 is kept away from valve rod 3.

It will be appreciated that when the valve stem 3 is moved upwardly, the toggle plate 32 is able to lift the slider 6 upwardly, thereby moving the locking lever 5 away from the valve stem 3 and compressing the first resilient member 52.

Preferably, be provided with spacing dish 51 on the locking pole 5, the second holding chamber has still been seted up in the valve body 1, the second holding intracavity slides and is provided with joint piece 7, joint piece 7 can stretch into in the first holding chamber 14, and can with spacing dish 51 butt, thereby the restriction locking pole 5 is to being close to 3 direction movements of valve rod.

Preferably, a second elastic member 71 is disposed in the second accommodating cavity, one end of the second elastic member 71 abuts against the clamping block 7, and the other end abuts against the inner wall of the second accommodating cavity, so that the clamping block 7 extends into the first accommodating cavity 14.

Preferably, the clamping block 7 divides the second accommodating cavity into an upper cavity 151 and a lower cavity 152, the valve body 1 is provided with a first flow channel 16 and a second flow channel 17, the first flow channel 16 communicates the inlet flow channel 11 with the upper cavity 151, and the second flow channel 17 communicates the inner cavity 12 with the lower cavity 152, so that when the valve flap 4 is closed, a medium in the inlet flow channel 11 can enter the upper cavity 151, so that the clamping block 7 moves downward and leaves the first accommodating cavity 14.

It can be understood that, when the valve flap 4 is opened and the inlet channel 11 is communicated with the inner cavity 12, the pressures in the upper cavity 151 and the lower cavity 152 are the same, so that the clamping block 7 can move upward under the action of the second elastic member 71 and extend into the first accommodating cavity 14 to abut against the limiting disc 51, and when the valve flap 4 closes the inlet channel 11, the pressure in the inner cavity 12 is reduced, and the inlet channel 11 still maintains a higher pressure, so that the hydraulic pressure in the upper cavity 151 communicated with the inlet channel 11 is higher, and the hydraulic pressure in the lower cavity 152 communicated with the inner cavity 12 is lower, thereby driving the clamping block 7 to move downward.

Preferably, the upper end of the clamping block 7 is provided with an inclined surface 72, and when the locking rod 5 moves away from the valve rod 3, the locking rod can abut against the inclined surface 72, so that the clamping block 7 is pushed to leave the first accommodating cavity 14.

It can be understood that, as shown in fig. 2 and 5, when the lock lever 5 moves to the left, the engaging block 7 can be pushed downward by the inclined surface 72, and after the lock lever 5 passes over the engaging block 7, the engaging block 7 is sprung up by the second elastic member 71, so that the lock lever 5 can be restricted from moving to the right.

Preferably, an elastic sealing ring 41 is arranged on the lower side of the valve flap 4, and the elastic sealing ring 41 can be abutted against the valve body 1 so as to seal the inlet flow passage 11 and the inner cavity 12.

Preferably, the upper end of the valve rod 3 is provided with a handle 8.

The working mode of the invention is as follows: as shown in fig. 1 to fig. 3, at this time, the valve flap 4 is in a closed state, when the valve flap 4 needs to be opened, the handle 8 is rotated clockwise, so as to drive the valve rod 3 to rotate clockwise, so that the valve flap 4 rises, the inlet channel 11 is communicated with the inner cavity 12, so as to balance the pressure of the inlet channel 11 and the pressure of the inner cavity 12, the clamping member is moved upward by the action force of the second elastic member 71, so as to extend into the first accommodating cavity 14, and meanwhile, the poking disc 32 abuts against the slider 6, so as to drive the slider 6 to move upward, so as to drive the locking rod 5 to be away from the valve rod 3 through the pulling rope 61, until the valve flap 4 is completely opened, as shown in fig. 4 and fig. 5, the limiting disc 51 abuts against the clamping block 7.

When the stop valve is closed to needs, anticlockwise rotation handle 8 drives valve rod 3 anticlockwise rotation, when making valve clack 4 descend to sealed inlet flow channel 11, because the liquid pressure of inner chamber 12 reduces, thereby make joint piece 7 downstream, make locking pole 5 be close to valve rod 3 under the effect of first elastic component 52, thereby with ratchet 31 joint, restriction valve rod 3 continues anticlockwise rotation, the elastic sealing ring 41 that has played restriction valve rod 3 excessive rotation and arouses from this warp the dead problem of damage and screw thread card.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.