CN220320394U - Check valve - Google Patents

Abstract

The utility model discloses a check valve, in particular to the field of check valves, which comprises a valve body, wherein the inner wall of the valve body is slidably connected with a valve core, the top of the valve core is fixedly provided with a valve shaft, the inner wall of the valve body is fixedly provided with a hollow column, the valve shaft is slidably connected inside the hollow column, the outer side of the hollow column is slidably connected with a pressing plate, the bottom of the pressing plate is provided with a first spring, the first spring is fixedly arranged at the top of the valve core, the inside of the pressing plate is rotatably connected with a plurality of first screws, the plurality of first screws are uniformly distributed in a circular array shape relative to the vertical center line of the pressing plate, and gears are fixedly arranged at the tops of the plurality of first screws. According to the utility model, the pressing plate and the first spring are arranged, the inner gear sleeve is driven to rotate by the rotating handle, so that the pressing plate is lifted, the first spring is stretched, and the pressure required by lifting the valve core is reduced, so that the pressure required by opening the check valve is adjusted.

Description

Check valve

Technical Field

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

Background

The check valve is a valve with a circular valve clack and can stop the backflow of medium by the action of self weight and medium pressure, and belongs to automatic valves, namely a check valve, a one-way valve, a backflow valve or an isolation valve.

The Chinese patent publication CN218152514U discloses a check valve, which comprises a valve body, a mounting cylinder, a valve plate and a valve cover, wherein a valve seat is fixedly arranged in an inner cavity of the valve body, a filter screen cylinder is fixedly arranged on the bottom surface of the valve seat, and the valve plate is clamped and embedded in the valve seat. When the filter screen cylinder is used, fluid enters the inner cavity of the valve body through one end provided with the water inlet connecting flange, and the fluid passes through the valve seat after the impurity contained in the fluid is filtered by the filter screen cylinder, and at the moment, the fluid pushes the valve plate to lift, so that the impurity blocked on the filter screen cylinder can be automatically cleaned when the filter screen cylinder is used. However, this arrangement does not have the capability of automatically adjusting the pressure required for opening the valve, and when the valve is opened in the face of a water flow with a small water pressure, the water pressure is insufficient to open the valve, so that the water flow cannot circulate, and therefore, how to design a check valve is a problem that we need to solve currently.

Disclosure of Invention

In order to overcome the above-mentioned drawbacks of the prior art, an embodiment of the present utility model provides a check valve, in which a pressing plate and a first spring are used to rotate an inner gear sleeve by rotating a handle, so that the pressing plate is lifted, and the first spring is stretched, and the pressure required by lifting a valve core is reduced, so as to adjust the pressure required by opening the check valve, thereby solving the problems set forth in the above-mentioned background art.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a check valve, includes the valve body, the inner wall sliding connection of valve body has the case, the top fixed mounting of case has the valve shaft, the inner wall fixed mounting of valve body has the hollow post, valve shaft sliding connection is in the inside of hollow post, the outside sliding connection of hollow post has the clamp plate, the bottom of clamp plate is equipped with first spring, first spring fixed mounting is at the top of case, the inside rotation of clamp plate is connected with first screw rod, the quantity of first screw rod sets up to a plurality of, a plurality of first screw rod is circumference array form evenly distributed setting about the vertical central line of clamp plate, a plurality of the equal fixed mounting in top of first screw rod has the gear, the outside meshing of gear has interior tooth cover.

In a preferred embodiment, the first screw rod is arranged in a threaded connection with the valve body, and a handle is fixedly arranged on the outer side of the inner tooth sleeve.

In a preferred embodiment, the inner wall of the hollow column is slidably connected with a limiting block, a second screw rod is fixedly arranged at the top of the limiting block, and the second screw rod is in threaded connection with the valve body.

In a preferred embodiment, a rotating handle is fixedly arranged at the top end of the second screw rod, and an upper rubber pad is fixedly arranged at the bottom of the valve core.

In a preferred embodiment, a stop ring is fixedly arranged on the inner wall of the valve body, and a buffer piece is connected to one side of the stop ring in a sliding manner.

In a preferred embodiment, a second spring is arranged at the bottom of the stop ring, the second spring is fixedly arranged on one side of the buffer piece, and a lower rubber pad is fixedly arranged at the top of the buffer piece.

In a preferred embodiment, a water inlet pipe is communicated with one side of the valve body, and a water outlet pipe is communicated with one side of the valve body away from the water inlet pipe.

The utility model has the technical effects and advantages that:

1. according to the utility model, the pressing plate and the first spring are arranged, the inner gear sleeve is driven to rotate through the rotating handle, so that the pressing plate is meshed with the gears to drive the first screw rod to rotate, the pressing plate is lifted, the first spring is stretched, the pressure required by lifting the valve core is reduced, the pressure required by opening the check valve is adjusted, different hydraulic environments are flexibly applicable, when the resistance required by opening the valve core is required to be increased, the pressing plate is lowered to drive the first spring to shrink, and the pressure required by lifting the valve core is increased;

2. according to the utility model, the buffer piece and the second spring are arranged, when the valve core descends due to the fact that water flow is conveyed into the valve body in the water inlet pipe is stopped, the upper rubber pad is contacted with the lower rubber pad, so that the phenomenon that the valve core is damaged due to the fact that the second screw rod is directly contacted with the buffer piece is avoided, meanwhile, the buffer piece is stressed by the descending of the valve core, so that the buffer piece descends, the second spring stretches, the impact force of the descending of the valve core is slowed down by the buffer piece under the action of the second spring, and the phenomenon that the valve core is damaged due to the fact that the valve core descends rapidly is avoided.

Drawings

Fig. 1 is a cross-sectional view of the front structure of the present utility model.

Fig. 2 is an enlarged view of the structure of the portion a of fig. 1 according to the present utility model.

Fig. 3 is an enlarged view of the B part structure of fig. 1 according to the present utility model.

The reference numerals are: 1. a valve body; 2. a valve core; 3. a valve shaft; 4. a hollow column; 5. a pressing plate; 6. a first spring; 7. a first screw; 8. a gear; 9. an inner tooth sleeve; 10. a handle; 11. a limiting block; 12. a second screw; 13. a rotating handle; 14. a rubber pad is arranged; 15. a stop ring; 16. a buffer member; 17. a second spring; 18. a lower rubber pad; 19. a water inlet pipe; 20. and a water outlet pipe.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-3 of the specification, as shown in fig. 1, the check valve of the embodiment of the utility model comprises a valve body 1, wherein the inner wall of the valve body 1 is slidably connected with a valve core 2, the top of the valve core 2 is fixedly provided with a valve shaft 3, the compression degree of the first spring 6 controls the pressure required by the rising of the valve core 2 through the arrangement of the valve shaft 3, the inner wall of the valve body 1 is fixedly provided with a hollow column 4, the valve shaft 3 is slidably connected in the hollow column 4, the outer side of the hollow column 4 is slidably connected with a pressing plate 5, when the first screw 7 descends, the first spring 6 is contracted through the pressing plate 5, the bottom of the pressing plate 5 is provided with the first spring 6, the first spring 6 is fixedly arranged at the top of the valve core 2, as shown in fig. 2, the inner side of the pressing plate 5 is rotatably connected with the first screw 7, the plurality of the first screw 7 are uniformly distributed in a circular array shape about the vertical center line of the pressing plate 5, the top of the first screw 7 is fixedly provided with a gear 8, the outer side of the gear 8 is meshed with an inner tooth sleeve 9, the inner tooth sleeve 9 is arranged through the arrangement of the inner tooth sleeve 9, the inner tooth sleeve 9 is matched with the gear 8, and the inner tooth sleeve 9 is rotatably arranged with the inner tooth sleeve 9, and the inner tooth sleeve is synchronously arranged with the first screw 7, and the inner screw 7 is synchronously rotated, and the inner screw 9 is fixedly arranged with the inner screw sleeve 9, and is arranged.

It should be noted that, when water flows into the valve body 1 through the water inlet pipe 19, the valve core 2 rises with the gradual increase of water pressure, the first spring 6 compresses synchronously, when the valve core 2 rises, the water entering the valve body 1 enters the water outlet pipe 20, so as to realize the circulation of water flow, when the rising resistance of the valve core 2 needs to be increased, the rotating handle 10 drives the inner gear sleeve 9 to rotate, so as to mesh with the plurality of gears 8, and the gears 8 drive the first screw rod 7 to rotate, because the first screw rod 7 and the valve body 1 are arranged in a threaded connection manner, the rotation of the first screw rod 7 gradually descends, so that the pressing plate 5 synchronously descends, and the first spring 6 contracts, because the first spring 6 contracts at this time, when the valve core 2 needs to rise, the first spring 6 contracts, a larger pressure is needed, the pressure required by the first spring 6 to shrink again is changed, the valve core 2 can be lifted up by needing larger water pressure, meanwhile, the pressing plate 5 is lifted up by reversely rotating the inner gear sleeve 9, the first spring 6 is stretched, the pressure required by the lifting of the valve core 2 is reduced, the pressure required by the opening of the check valve is adjusted, the hydraulic environment is flexibly applicable, when the flow rate of water flow needs to be adjusted, the second screw 12 is rotated by rotating the rotating handle 13, because the second screw 12 is in threaded connection with the valve body 1, the second screw 12 can be lowered when rotating, the limiting block 11 is driven to descend, the limiting block 11 can block and limit when the valve core 2 is lifted up to be contacted with the limiting block 11, the maximum lifting distance of the valve core 2 is changed, the amount of water flow which can flow out of the valve body 1 is changed, thereby realizing the purpose of adjusting the flow rate of water flow.

Further, as shown in fig. 2, the inner wall sliding connection of the hollow column 4 has a stopper 11, the top fixed mounting of stopper 11 has a second screw 12, the second screw 12 is threaded connection form setting with the valve body 1, as shown in fig. 1, the top fixed mounting of second screw 12 has a rotating handle 13, as shown in fig. 3, the bottom fixed mounting of case 2 has an upper rubber pad 14, the inner wall fixed mounting of valve body 1 has a stop ring 15, through the setting of stop ring 15, limit the case 2, one side sliding connection of stop ring 15 has a buffer 16, the bottom of stop ring 15 is equipped with second spring 17, through the setting of second spring 17, increase the resistance that buffer 16 descends, thereby slow down the impulsive force that the case 2 descends, second spring 17 fixed mounting is in one side of buffer 16, the top fixed mounting of buffer 16 has a lower rubber pad 18, as shown in fig. 1, one side intercommunication of valve body 1 is equipped with inlet tube 19, one side intercommunication that the valve body 1 kept away from inlet tube 19 is equipped with outlet pipe 20.

When the valve core 2 is lifted, the buffer member 16 is lifted under the action of the shrinkage of the second spring 17, so that when the valve core 2 is lifted due to the fact that the water flow in the valve body 1 stops to be conveyed in the water inlet pipe 19, the upper rubber pad 14 is contacted with the lower rubber pad 18, the phenomenon that the valve core 2 is damaged due to the fact that the second screw rod 12 is directly contacted with the buffer member 16 is avoided, meanwhile, the buffer member 16 is stressed by the fact that the buffer member 16 is lifted due to the fact that the valve core 2 is lifted due to the fact that the buffer member 2 is lifted due to the fact that the second spring 17 stretches, the impact force of the valve core 2 lifted due to the fact that the valve core 2 is lifted rapidly is avoided.

The last points to be described are: first, in the description of the present application, it should be noted that, unless otherwise specified and defined, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be mechanical or electrical, or may be a direct connection between two elements, and "upper," "lower," "left," "right," etc. are merely used to indicate relative positional relationships, which may be changed when the absolute position of the object being described is changed;

secondly: in the drawings of the disclosed embodiments, only the structures related to the embodiments of the present disclosure are referred to, and other structures can refer to the common design, so that the same embodiment and different embodiments of the present disclosure can be combined with each other under the condition of no conflict;

finally: the foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and principles of the utility model are intended to be included within the scope of the utility model.

Claims (7)

1. A check valve comprising a valve body (1), characterized in that: the valve is characterized in that a valve core (2) is slidably connected to the inner wall of the valve body (1), a valve shaft (3) is fixedly arranged at the top of the valve core (2), a hollow column (4) is fixedly arranged at the inner wall of the valve body (1), the valve shaft (3) is slidably connected to the inside of the hollow column (4), a pressing plate (5) is slidably connected to the outer side of the hollow column (4), a first spring (6) is arranged at the bottom of the pressing plate (5), a first screw (7) is rotatably connected to the inner side of the pressing plate (5), a plurality of first screws (7) are uniformly distributed in a circumferential array mode relative to the vertical center line of the pressing plate (5), gears (8) are fixedly arranged at the top of the first screws (7), and inner tooth sleeves (9) are meshed to the outer side of the gears (8).

2. A check valve according to claim 1, wherein: the first screw (7) is in threaded connection with the valve body (1), and a handle (10) is fixedly arranged on the outer side of the inner tooth sleeve (9).

3. A check valve according to claim 2, wherein: the inner wall sliding connection of hollow post (4) has stopper (11), the top fixed mounting of stopper (11) has second screw rod (12), second screw rod (12) are threaded connection form setting with valve body (1).

4. A check valve according to claim 3, wherein: the top end of the second screw rod (12) is fixedly provided with a rotating handle (13), and the bottom of the valve core (2) is fixedly provided with an upper rubber pad (14).

5. A check valve according to claim 4, wherein: the inner wall of the valve body (1) is fixedly provided with a stop ring (15), and one side of the stop ring (15) is connected with a buffer piece (16) in a sliding manner.

6. A check valve according to claim 5, wherein: the bottom of snap ring (15) is equipped with second spring (17), second spring (17) fixed mounting is in one side of bolster (16), the top fixed mounting of bolster (16) has lower rubber pad (18).

7. A check valve according to claim 6, wherein: one side of the valve body (1) is communicated with a water inlet pipe (19), and one side of the valve body (1) far away from the water inlet pipe (19) is communicated with a water outlet pipe (20).