CN216201085U

CN216201085U - Adjusting check valve

Info

Publication number: CN216201085U
Application number: CN202122304403.3U
Authority: CN
Inventors: 周道亮; 杨选辰; 杨选浩
Original assignee: Zhejiang Diantai Valve Industry Co ltd
Current assignee: Zhejiang Diantai Valve Industry Co ltd
Priority date: 2021-09-23
Filing date: 2021-09-23
Publication date: 2022-04-05
Anticipated expiration: 2031-09-23

Abstract

The utility model relates to the field of check valves, in particular to an adjusting check valve which comprises a valve body, wherein a valve cover is fixedly arranged at the upper end of the valve body, a valve seat is fixedly arranged in the valve body, a valve clack is arranged on one side of the valve seat, a valve rod is arranged in the valve cover, a limiting plate extending into the valve body is integrally arranged at the bottom end of the valve rod, a rocker arm is fixedly arranged on the back surface of the valve clack through a second hexagon nut, and the upper end of the rocker arm is movably connected with the valve cover through a pin shaft; a valve rod nut is installed at the upper end of the valve rod in a threaded mode, the valve rod nut is movably installed at the top end of the valve cover, and a hand wheel is installed on the outer ring of the valve rod nut in a locking mode through the hand wheel nut; the valve clack is for swaing the formula structure, and when the valve rod rose and valve place pipeline normally water delivery, the pressure when flowing by the medium was opened the valve clack rotation top for the normal water delivery of valve, and when the pipeline stopped to supply water, the valve clack was closed by oneself under the pressure effect when the medium was against the current, because special swaing the formula structure and playing that the shut-off pressure is littleer, the flexibility ratio is higher.

Description

Adjusting check valve

Technical Field

The utility model relates to the field of check valves, in particular to a regulating check valve.

Background

The stop check valve is a multi-purpose valve with the functions of both a stop valve and a check valve. The structure form is similar to that of a stop valve, but the valve rod is not fixedly connected with the valve clack. When the valve rod descends to press the valve clack on the valve seat, the valve rod plays a role of a stop valve; the valve rod acts as a check valve when lifted. The use of a stop check valve can save installation costs and space in a pipeline where both a stop valve (or gate valve) and a check valve need to be installed (such as an outlet end of a water pump), or in a place where the installation location is limited (such as a ship).

When the traditional stop check valve plays a role of stopping and returning, the traditional stop check valve is essentially a lifting check valve, and the working principle of the traditional stop check valve is the same as that of the lifting check valve. When the valve is closed, the valve rod moves downwards to push the valve clack, so that the valve has the closing function of the stop valve. When the valve is opened, the valve rod is separated from the valve clack, the valve clack can move up and down along the valve rod, the valve clack is equal to a lifting check valve at the moment, when fluid flows backwards, the valve clack can be automatically closed under the action of self weight and countercurrent pressure to prevent media from flowing backwards, the pressure required for opening and closing is large, for example, when the valve is opened, the water pressure of inlet water is required to be large enough, the valve clack gravity can be overcome, the valve clack is jacked up, and the valve is switched on.

SUMMERY OF THE UTILITY MODEL

To address the problems in the prior art, the present invention provides a modulating check valve.

The technical scheme adopted by the utility model for solving the technical problems is as follows: an adjusting check valve comprises a valve body, wherein a valve cover is fixedly mounted at the upper end of the valve body, a valve seat is fixedly mounted in the valve body, a valve clack is arranged on one side of the valve seat, a valve rod is mounted in the valve cover, a limiting plate extending into the valve body is integrally arranged at the bottom end of the valve rod, a rocker arm is fixedly mounted on the back surface of the valve clack through a second hexagon nut, and the upper end of the rocker arm is movably connected with the valve cover through a pin shaft; a valve rod nut is installed on the upper end of the valve rod in a threaded mode, the valve rod nut is movably installed on the top end of the valve cover, and a hand wheel is installed on the outer ring of the valve rod nut in a locking mode through the hand wheel nut.

Furthermore, a stuffing box is installed on the inner ring of the valve cover, the valve cover and the stuffing box are in locking connection through a self-sealing clamping nut and a disc spring, lower stuffing and upper stuffing are filled in the stuffing box, a stuffing pressing sleeve is installed at the top end of the stuffing box, and a stuffing pressing plate is installed at the top end of the stuffing pressing sleeve.

Furthermore, loose joint bolts are installed at two ends of the packing press plate, the top ends of the loose joint bolts are fixedly locked with the packing press plate through a hexagon nut, and the bottom ends of the loose joint bolts are movably connected with the valve cover through pins.

Further, joint parts of the valve body, the valve cover and the stuffing box are provided with self-sealing rings.

The utility model has the beneficial effects that:

according to the adjusting check valve, the valve clack is of a swing structure, when the valve rod rises upwards and a pipeline where the valve is located normally conveys water, the valve clack is rotated and jacked open by pressure generated when a medium flows, so that the valve normally conveys water, and when the pipeline stops supplying water, the valve clack is automatically closed under the action of pressure generated when the medium flows reversely, and due to the special swing structure, the closing pressure is lower, and the flexibility is higher; when needs regulation flow, with the valve rod to descending to the height of adjusting valve rod lower extreme limiting plate, and then highly adjust according to the spacing butt of adjusting the limiting plate to the valve clack rocking arm and open the flow size, when the valve rod arrived a locating position down, its lower extreme limiting plate deadlocks the valve clack rocking arm completely, accomplishes the effect of forcing the shut-off valve.

Drawings

The utility model is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic view of the regulating check valve of the present invention in a closed configuration;

FIG. 2 is a schematic view of the regulating check valve of the present invention in an open configuration;

in the figure: 1. a valve body; 2. a valve cover; 3. a valve seat; 4. a valve flap; 5. a valve stem; 6. a rocker arm; 7. a stuffing box; 8. lower filling; 9. filling; 10. a self-sealing ring; 11. a disc spring; 12. a hand wheel nut; 13. loose joint bolts; 14. a pin; 15. a first hexagonal nut; 16. a second hexagonal nut; 17. self-sealing and tightening the nut; 18. pressing and sleeving the filler; 19. a packing press plate; 20. a valve stem nut; 21. a handwheel.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the utility model easy to understand, the utility model is further described with the specific embodiments.

As shown in fig. 1-2, the adjusting check valve of the utility model comprises a valve body 1, wherein a valve cover 2 is fixedly installed at the upper end of the valve body 1, a valve seat 3 is fixedly installed inside the valve body 1, a valve flap 4 is arranged on one side of the valve seat 3, a valve rod 5 is installed in the valve cover 2, a limiting plate extending into the valve body 1 is integrally arranged at the bottom end of the valve rod 5, a rocker arm 6 is fixedly installed on the back surface of the valve flap 4 through a second hexagon nut 16, and the upper end of the rocker arm 6 is movably connected with the valve cover 2 through a pin shaft; valve-stem nut 20 is installed to the upper end screw thread of valve rod 5, just valve-stem nut 20 movable mounting in the top of valve gap 2, the outer lane of valve-stem nut 20 is locked through hand wheel nut 12 and is installed hand wheel 21.

The valve cap is characterized in that a stuffing box 7 is installed on the inner ring of the valve cap 2, the valve cap 2 is connected with the stuffing box 7 in a locking mode through a self-sealing clamping nut 17 and a disc spring 11, a lower stuffing 8 and an upper stuffing 9 are filled in the stuffing box 7, a stuffing pressing sleeve 18 is installed at the top end of the stuffing box 7, and a stuffing pressing plate 19 is installed at the top end of the stuffing pressing sleeve 18. Loose joint bolt 13 is all installed at the both ends of packing clamp plate 19, just loose joint bolt 13's top through a hexagon nut 15 with packing clamp plate 19 locking is fixed, loose joint bolt 13's bottom through pin 14 with valve gap 2 swing joint, wherein, lower packing 8 adopts stainless steel wire and flexible graphite, and the packing adopts flexible graphite, can improve the leakproofness of valve rod 5 junction through the packing, prevents the infiltration.

The joint of the valve body 1, the valve cover 2 and the stuffing box 7 is provided with a self-sealing ring 10, so that the sealing performance of the joint of the valve body 1, the valve cover 2 and the stuffing box 7 can be improved.

Specifically, when the valve needs to be opened, the hand wheel 21 is rotated upwards to drive the valve rod nut 20 to rotate, the valve rod 5 is driven to move upwards through the thread transmission of the valve rod nut 20, and then the limiting plate at the bottom end of the valve rod 5 is driven to move upwards synchronously, so that the limiting plate does not limit the rocker arm 6 any more, wherein a limiting groove for performing radial limiting with the valve rod 5 is arranged in the valve body 1 to prevent the valve rod nut 20 from driving the valve rod 5 to rotate when rotating, and therefore the valve rod nut 20 is ensured to be capable of driving the valve rod 5 to lift when rotating; when the pipeline where the valve is located normally delivers water, the valve flap 4 is rotated rightwards and jacked open by the pressure when the medium flows, so that the valve normally delivers water, and when the pipeline stops supplying water, the valve flap 4 rotates leftwards and automatically closes under the action of the pressure when the medium flows reversely, so that the check function is realized; and when needs regulation flow, reverse rotation hand wheel 21 is with valve rod 5 to descending to the height of 5 lower extreme limiting plates of regulating valve rod, and then highly adjust according to the spacing butt of adjusting the limiting plate to rocking arm 6 and open the flow size, when valve rod 6 descended a locating position, its lower extreme limiting plate was died rocking arm 6 complete lock, accomplishes the effect of forcing to close the valve.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the embodiments and descriptions given above are only illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which fall within the scope of the claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. A regulating non-return valve comprising a valve body (1), characterized in that: the valve comprises a valve body (1), a valve cover (2) is fixedly mounted at the upper end of the valve body (1), a valve seat (3) is fixedly mounted inside the valve body (1), a valve clack (4) is arranged on one side of the valve seat (3), a valve rod (5) is mounted in the valve cover (2), a limiting plate extending into the valve body (1) is integrally arranged at the bottom end of the valve rod (5), a rocker arm (6) is fixedly mounted on the back surface of the valve clack (4) through a second hexagon nut (16), and the upper end of the rocker arm (6) is movably connected with the valve cover (2) through a pin shaft; valve-stem nut (20) is installed to the upper end screw thread of valve rod (5), just valve-stem nut (20) movable mounting in the top of valve gap (2), hand wheel (21) are installed through hand wheel nut (12) locking in the outer lane of valve-stem nut (20).

2. A modulating check valve as defined in claim 1 wherein: stuffing box (7) is installed to the inner circle of valve gap (2), just valve gap (2) with through self sealss jam nut (17) and dish spring (11) locking connection between stuffing box (7), stuffing box (7) intussuseption is filled with down pack (8) and last filler (9), packing pressure cover (18) is installed on the top of stuffing box (7), packing clamp plate (19) is installed on the top of packing pressure cover (18).

3. A modulating check valve as defined in claim 2 wherein: loose joint bolt (13) are all installed at the both ends of packing clamp plate (19), just the top of loose joint bolt (13) through a hexagon nut (15) with packing clamp plate (19) locking is fixed, the bottom of loose joint bolt (13) through pin (14) with valve gap (2) swing joint.

4. A modulating check valve as defined in claim 2 wherein: and a self-sealing ring (10) is arranged at the joint of the valve body (1), the valve cover (2) and the stuffing box (7).