CN212273161U - Leak-proof check valve with secondary anti-reflux function - Google Patents

Abstract

The utility model discloses a leak protection check valve with function is prevented against current by secondary, including first valve body, valve gap and second valve body, bolt fixedly connected with valve gap is passed through to the upper end of first valve body, the middle part of valve gap is rotated and is connected with the threaded rod, the inboard sliding connection of first valve body upper end has movable post, activity post upper end is provided with first sealing washer with the junction of first valve body, bolt fixedly connected with second valve body is passed through in the left side of first valve body, the fixed pipe of inboard fixedly connected with of second valve body left end, the outside cover of movable rod is equipped with reset spring, the movable rod right-hand member is provided with the second sealing washer with the junction of fixed pipe, the right side block of fixed pipe is connected with the check plate, and the outside fixedly connected with sealing plug of check plate. This leak protection check valve with function is prevented flowing backwards to the secondary is convenient for this check valve to carry out the secondary and prevent flowing backwards, and has improved the leakproofness of this check valve.

Description

Leak-proof check valve with secondary anti-reflux function

Technical Field

The utility model relates to a leak protection check valve technical field that is relevant specifically is a leak protection check valve with function is prevented against current by secondary.

Background

The check valve mainly produces a valve that moves and block medium refluence through medium pressure, and according to the usage of check valve difference, its kind is diversified, including over-and-under type, swing formula and butterfly etc. the check valve uses with the stop valve cooperation usually, plays the effect of safety isolation.

However, the check valve is easy to leak during operation, so that the secondary backflow prevention treatment is inconvenient, and the practicability of the check valve is reduced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a leak protection check valve with function is prevented against current by the secondary to the check valve of being not convenient for who proposes in solving above-mentioned background art carries out the secondary and prevents against current, and has reduced the leakproofness of check valve, makes the problem of seepage phenomenon appear in the check valve.

In order to achieve the above object, the utility model provides a following technical scheme: a leakage-proof check valve with secondary anti-reflux function comprises a first valve body, a valve cover and a second valve body, wherein the upper end of the first valve body is fixedly connected with the valve cover through a bolt, a first sealing gasket is clamped and connected at the joint of the valve cover and the first valve body, a threaded rod is rotatably connected at the middle part of the valve cover, a rotating handle is fixedly connected at the upper end of the threaded rod, a movable column is slidably connected at the inner side of the upper end of the first valve body, a limiting block is welded at the outer side of the upper end of the movable column, a first sealing ring is arranged at the joint of the upper end of the movable column and the first valve body, a rubber plug is fixedly connected at the lower surface of the movable column, a second valve body is fixedly connected at the left side of the first valve body through a bolt, a second sealing gasket is clamped and connected at the joint of the second valve body and the first valve body, a fixed, the outside cover of movable rod is equipped with reset spring, and the outside welding of movable rod right-hand member has the limiting plate, the junction of movable rod right-hand member and fixed pipe is provided with the second sealing washer, the right side block of fixed pipe is connected with the check plate, and the outside fixedly connected with sealing plug of check plate.

Preferably, the movable column is vertically arranged on the inner side of the first valve body, and the movable column forms a lifting structure on the inner side of the first valve body through a threaded rod.

Preferably, the limiting block is connected with the inner side wall of the first valve body in a clamping mode, and the limiting block is symmetrically arranged relative to the vertical middle axis of the movable column.

Preferably, the lower extreme of rubber buffer is the toper structure, and the diameter size of rubber buffer upper end cross section is greater than the diameter size of activity post cross section.

Preferably, the right side of the fixed pipe and the inner side wall of the second valve body are both attached to the sealing plug, and the longitudinal section of the sealing plug is of an inverted L-shaped structure.

Preferably, the movable rod is connected with the check plate in a penetrating mode, and the longitudinal section of the movable rod is of a T-shaped structure.

Compared with the prior art, the beneficial effects of the utility model are that: the leakage-proof check valve with the secondary backflow prevention function is convenient for secondary backflow prevention of the check valve, improves the sealing property of the check valve and avoids leakage;

1. the check valve is provided with a limiting block, the limiting block is clamped and connected with the inner side wall of the first valve body and symmetrically arranged about the vertical middle axis of the movable column, and the movable column drives the limiting block to form a sliding structure on the first valve body, so that the check valve is convenient to open and close, and the stability is improved;

2. the check valve is provided with the rubber plug, the lower end of the rubber plug is of a conical structure, the diameter size of the cross section of the upper end of the rubber plug is larger than that of the cross section of the movable column, the right side of the fixed pipe and the inner side wall of the second valve body are both in fit arrangement with the sealing plug, and through the rubber plug and the sealing plug, the sealing performance of the check valve is effectively improved, and the leakage phenomenon is avoided;

3. be equipped with the check plate, elastic deformation through reset spring makes the movable rod drive the check plate and slides on fixed pipe to make the check plate drive the sealing plug block and connect on the right side of fixed pipe, make this check valve have the secondary and prevent the function against the current, improved the practicality.

Drawings

Fig. 1 is a schematic view of the front cross-sectional structure of the present invention;

FIG. 2 is an enlarged schematic view of the structure at A of FIG. 1 according to the present invention;

FIG. 3 is a schematic view of the connection between the movable column and the rubber stopper in a front perspective view;

fig. 4 is a schematic view of the front perspective structure of the connection between the check plate and the sealing plug of the present invention.

In the figure: 1. a first valve body; 2. a valve cover; 3. a first gasket; 4. a threaded rod; 5. turning a handle; 6. a movable post; 7. a limiting block; 8. a first seal ring; 9. a rubber plug; 10. a second valve body; 11. a second gasket; 12. a fixed tube; 13. a movable rod; 14. a return spring; 15. a limiting plate; 16. a second seal ring; 17. a check plate; 18. and (4) sealing the plug.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-4, the present invention provides a technical solution: a leakage-proof check valve with a secondary anti-reflux function comprises a first valve body 1, a valve cover 2, a first sealing gasket 3, a threaded rod 4, a rotating handle 5, a movable column 6, a limiting block 7, a first sealing ring 8, a rubber plug 9, a second valve body 10, a second sealing gasket 11, a fixed pipe 12, a movable rod 13, a reset spring 14, a limiting plate 15, a second sealing ring 16, a check plate 17 and a sealing plug 18, wherein the upper end of the first valve body 1 is fixedly connected with the valve cover 2 through a bolt, the joint of the valve cover 2 and the first valve body 1 is clamped and connected with the first sealing gasket 3, the middle part of the valve cover 2 is rotatably connected with the threaded rod 4, the upper end of the threaded rod 4 is fixedly connected with the rotating handle 5, the inner side of the upper end of the first valve body 1 is slidably connected with the movable column 6, the limiting block 7 is welded on the outer side of the upper end of the, and the lower fixed surface of activity post 6 is connected with rubber buffer 9, bolt fixedly connected with second valve body 10 is passed through in the left side of first valve body 1, and the junction block of second valve body 10 and first valve body 1 is connected with the sealed pad 11 of second, the inboard fixedly connected with fixed tube 12 of the second valve body 10 left end, and the equal sliding connection in inside of lateral wall has movable rod 13 about fixed tube 12, the outside cover of movable rod 13 is equipped with reset spring 14, and the outside welding of movable rod 13 right-hand member has limiting plate 15, the junction of movable rod 13 right-hand member and fixed tube 12 is provided with second sealing washer 16, the right side block of fixed tube 12 is connected with check plate 17, and the outside fixedly connected with sealing plug 18 of check plate 17.

If in fig. 1 and fig. 3 activity post 6 is perpendicular setting in the inboard of first valve body 1, and activity post 6 constitutes elevation structure through threaded rod 4 in the inboard of first valve body 1, and stopper 7 is connected with the mode of the inside wall adoption block of first valve body 1, and stopper 7 sets up about the perpendicular axis symmetry of activity post 6, and the opening and shutting of this check valve of being convenient for has improved stability.

As in fig. 1 and 4 rubber buffer 9's lower extreme is the toper structure, and the diameter size of rubber buffer 9 upper end cross section is greater than the diameter size of the 6 cross sections of activity post, the right side of fixed pipe 12 and the inside wall of second valve body 10 all with the sealing plug 18 laminating setting, and the longitudinal section of sealing plug 18 is "L" font structure of falling, through rubber buffer 9 and sealing plug 18, the effectual leakproofness that has improved this check valve avoids appearing the phenomenon of seepage.

As shown in fig. 2 and fig. 1, the movable rod 13 is connected with the check plate 17 in a penetrating manner, and the longitudinal section of the movable rod 13 is in a "T" shape, the movable rod 13 drives the check plate 17 to slide on the fixed pipe 12, so that the check plate 17 drives the sealing plug 18 to be clamped and connected to the right side of the fixed pipe 12, and the check valve has a secondary anti-backflow function, thereby improving the practicability.

The working principle is as follows: when the leakage-proof check valve with the secondary backflow prevention function is used, as shown in the attached drawing 1, a rotating handle 5 is screwed to rotate, so that a threaded rod 4 rotates on a valve cover 2, a movable column 6 drives a limiting block 7 to slide upwards on a first valve body 1, a first sealing ring 8 is arranged at the joint of the movable column 6 and the first valve body 1, a rubber plug 9 is displaced after the movable column 6 moves, as shown in the attached drawings 1 and 2, a first sealing gasket 3 is clamped at the joint of the valve cover 2 and the first valve body 1, a second sealing gasket 11 is clamped at the joint of a second valve body 10 and the first valve body 1, the second valve body 10 and the valve cover 2 are fixedly connected to the first valve body 1 through bolts, after fluid enters the inner side of the second valve body 10, a check plate 17 is pushed to slide on a fixed pipe 12 through a movable rod 13, the check plate 17 is disconnected with the fixed pipe 12, make the fluid get into the inboard of first valve body 1, accomplish the transport, after stopping carrying, the inboard fluid of first valve body 1 flows back to the inboard of second valve body 10, as shown according to fig. 2 and fig. 4, the fluid promotes check plate 17 in the opposite direction, the left side and the limiting plate 15 block of check plate 17 are connected, and check plate 17 and the right-hand member fixed connection of movable rod 13, reset spring 14 resumes elastic deformation this moment, the junction of movable rod 13 right-hand member and fixed pipe 12 is provided with second sealing washer 16, movable rod 13 drives check plate 17 and slides once more, make check plate 17 drive sealing plug 18 and fixed pipe 12 block, accomplish sealed processing and prevent the backward flow, this is exactly the whole process that the leak protection check valve that has the secondary function of preventing against current used.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. The utility model provides a leak protection check valve with function is prevented flowing against reverse for the secondary, includes first valve body (1), valve gap (2) and second valve body (10), its characterized in that: the upper end of the first valve body (1) is fixedly connected with a valve cover (2) through a bolt, the joint of the valve cover (2) and the first valve body (1) is clamped with a first sealing gasket (3), the middle part of the valve cover (2) is rotatably connected with a threaded rod (4), the upper end of the threaded rod (4) is fixedly connected with a rotating handle (5), the inner side of the upper end of the first valve body (1) is slidably connected with a movable column (6), the outer side of the upper end of the movable column (6) is welded with a limiting block (7), a first sealing ring (8) is arranged at the joint of the upper end of the movable column (6) and the first valve body (1), the lower surface of the movable column (6) is fixedly connected with a rubber plug (9), the left side of the first valve body (1) is fixedly connected with a second valve body (10) through a bolt, and the joint of the second valve body (10) and, the inboard fixedly connected with fixed pipe (12) of second valve body (10) left end, and the equal sliding connection in inside of lateral wall has movable rod (13) about fixed pipe (12), the outside cover of movable rod (13) is equipped with reset spring (14), and the outside welding of movable rod (13) right-hand member has limiting plate (15), the junction of movable rod (13) right-hand member and fixed pipe (12) is provided with second sealing washer (16), the right side block of fixed pipe (12) is connected with check plate (17), and the outside fixedly connected with sealing plug (18) of check plate (17).

2. The leakage-proof check valve with the secondary reverse flow-preventing function as claimed in claim 1, wherein: the movable column (6) is vertically arranged on the inner side of the first valve body (1), and the movable column (6) forms a lifting structure on the inner side of the first valve body (1) through the threaded rod (4).

3. The leakage-proof check valve with the secondary reverse flow-preventing function as claimed in claim 1, wherein: the limiting block (7) is connected with the inner side wall of the first valve body (1) in a clamping mode, and the limiting block (7) is symmetrically arranged relative to the vertical middle axis of the movable column (6).

4. The leakage-proof check valve with the secondary reverse flow-preventing function as claimed in claim 1, wherein: the lower end of the rubber plug (9) is of a conical structure, and the diameter size of the cross section of the upper end of the rubber plug (9) is larger than that of the cross section of the movable column (6).

5. The leakage-proof check valve with the secondary reverse flow-preventing function as claimed in claim 1, wherein: the right side of the fixed pipe (12) and the inner side wall of the second valve body (10) are both attached to the sealing plug (18), and the longitudinal section of the sealing plug (18) is of an inverted L-shaped structure.

6. The leakage-proof check valve with the secondary reverse flow-preventing function as claimed in claim 1, wherein: the movable rod (13) is connected with the check plate (17) in a penetrating mode, and the longitudinal section of the movable rod (13) is of a T-shaped structure.

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