CN217634066U

CN217634066U - Hydraulic slow-closing type air pipe check valve

Info

Publication number: CN217634066U
Application number: CN202220845915.2U
Authority: CN
Inventors: 孙苗; 刘鑫
Original assignee: China IPPR International Engineering Co Ltd
Current assignee: China IPPR International Engineering Co Ltd
Priority date: 2022-04-13
Filing date: 2022-04-13
Publication date: 2022-10-21
Anticipated expiration: 2032-04-13

Abstract

The utility model provides a hydraulic slow-closing type air pipe check valve, which relates to the technical field of ventilation air conditioners, in particular to an air pipe check valve, comprising a valve plate, a retainer ring, a hydraulic buffer mechanism, a valve plate rotating shaft, a first connecting rod, a second connecting rod and a fixed connecting seat; the retaining ring is fixed at the valve body inner wall in the annular, and the fixed connection seat is fixed at the retaining ring top, and hydraulic buffer mechanism is fixed at the valve plate top, and hydraulic buffer mechanism is connected through first connecting rod, second connecting rod with the fixed connection seat. The utility model can realize the one-way flow of air, prevent the reverse flow of air, has the function of automatic closing, and can improve the sealing performance of the check valve; meanwhile, the hydraulic buffer mechanism can avoid severe impact on the check ring when the check valve is closed, and the vibration reduction effect is good.

Description

Hydraulic slow-closing type air pipe check valve

Technical Field

The utility model relates to a ventilation air conditioning technology field, more specifically relates to hydraulic pressure slows down closed tuber pipe check valve.

Background

The check valve is used in ventilation and air conditioning system, is an independent component capable of automatically opening and closing along with airflow, is installed to prevent gas from flowing backwards, and is especially installed in the ventilation system when two or more fans are connected in parallel. In addition, check valves are usually installed at the exhaust ends of the kitchen fume exhaust pipe and the toilet exhaust pipe to prevent the backflow of the odorous gas.

The existing air pipe check valve usually comprises a valve plate and a retainer ring, and the retainer ring can prevent the valve plate from being reversely opened, so that the backflow of air is avoided. When the ventilation system stops working, some occasions require the check valve to have the automatic closing function, and there are two common methods: one is that the valve plate is reset and closed by the aid of an additional weight or the gravity of the valve plate, but the installation direction of the valve is strictly limited, and the other is that the valve plate is reset and closed by the aid of a spring. Because the closing process of above two kinds of check valves all can produce the impact force to the retaining ring, long-term the use leads to the retaining ring to warp easily, influences the seal of valve, can produce great noise simultaneously.

Accordingly, there is a need for new techniques to at least partially address the deficiencies of the prior art, such as reducing the impact force on the retainer ring when the valve plate is closed.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model provides a hydraulic pressure slows down closed tuber pipe check valve can self-closing when ventilation system shut down, to the impact force of retaining ring when can avoiding valve plate to close in the check valve simultaneously, has better seal and shock attenuation effect.

According to the utility model discloses an aspect provides a hydraulic pressure slowly closes formula tuber pipe check valve, include: the valve comprises a valve body (1), a valve plate (2), a retainer ring (3), a fixed connecting seat (6), a first connecting rod (7) and a second connecting rod (8), and is characterized by further comprising a hydraulic buffer mechanism (5);

one side of the hydraulic buffer mechanism (5) is fixed on the valve plate (2), and the other side of the hydraulic buffer mechanism is connected with the first connecting rod (7); the first connecting rod (7) is movably connected with the second connecting rod (8), the second connecting rod (8) is movably connected with the fixed connecting seat (6), and the fixed connecting seat (6) is fixed on the retainer ring (3);

the hydraulic buffer mechanism (5) comprises a shell (9), a transmission gear (10), a rack plunger (11), a return spring (12) and a one-way valve (13), wherein a cavity (91), a gear cavity (92) and a throttling cavity (93) which are communicated with each other are formed in the shell (9), and hydraulic oil can circularly flow in each cavity;

the rack plunger (11) is arranged in the cavity (91) and divides the first cavity (91) into a first cavity (18) and a second cavity (19), a through hole is formed in the side wall, facing the second cavity (19), of the rack plunger (11), and the check valve (13) is fixedly arranged in the through hole; the return spring (12) is arranged in the first cavity (18), one end of the return spring is fixed on the side wall of the cavity (91), and the other end of the return spring is fixed on the rack plunger (11); the transmission gear (10) is disposed in the gear chamber (92), and a gear that is fitted to the transmission gear (10) is formed on the lower side of the rack plunger (11).

According to the utility model discloses an embodiment, wherein hydraulic pressure slowly closes formula tuber pipe check valve is still including setting up throttle case (14) in throttle chamber (93), and throttle chamber (93) are through throttle aperture (15) and cavity (91) intercommunication, and throttle case (14) can be adjusted the size of throttle aperture (15).

According to the utility model discloses an embodiment, wherein hydraulic pressure slowly closes formula tuber pipe check valve still includes valve plate pivot (4), the one end of valve plate (2) is fixed on valve body (1) through valve plate pivot (4) with rotating.

According to an embodiment of the invention, wherein the return spring (12) is in a normal state or in a compressed state when the valve plate is in (2) closed state; when the valve plate is in the open state (2), the return spring (12) is in a compressed state.

According to the utility model discloses an embodiment, wherein buffer gear (5) are rigid connection with first connecting rod (7), fixed connection seat (6) are hinged joint with second connecting rod (8), first connecting rod (7) constitute hinged joint through the round pin axle with second connecting rod (8).

According to the utility model discloses an embodiment, wherein hydraulic pressure slowly-closed tuber pipe check valve still includes fixed sealing member (20) that set up on valve body (1) for supplementary sealed when valve plate (2) are closed.

The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.

Drawings

Some specific embodiments of the invention will be described in detail hereinafter by way of example and not by way of limitation with reference to the accompanying drawings. The objects and features of the present invention will become more apparent in view of the following description taken in conjunction with the accompanying drawings, in which:

fig. 1 is a schematic three-dimensional structure diagram of an opening state of a hydraulic slow-closing type air pipe check valve according to an embodiment of the present invention;

fig. 2 is a schematic three-dimensional structure diagram of an initial closed state of a hydraulic slow-closing type air pipe check valve according to an embodiment of the present invention;

fig. 3 is a schematic three-dimensional structure diagram of a fully closed state of a hydraulic slow-closing type air pipe check valve according to an embodiment of the present invention;

fig. 4 is a schematic view of a partial structure of a hydraulic buffer mechanism when a valve plate of a hydraulic slow-closing type air pipe check valve is in an open state according to an embodiment of the present invention; and

fig. 5 is according to the utility model discloses hydraulic pressure buffer gear's local structure schematic diagram when hydraulic pressure slowly closes formula tuber pipe check valve plate closed condition.

Detailed Description

In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application shall fall within the scope of protection of the present application.

Referring to fig. 1 to 3, the utility model provides a hydraulic pressure slowly-closed type tuber pipe check valve, this hydraulic pressure slowly-closed type tuber pipe check valve can include valve body 1, valve plate 2, retaining ring 3, valve plate pivot 4, hydraulic buffer mechanism 5, fixed connection seat 6, first connecting rod 7, second connecting rod 8 and sealing member 20.

Wherein, two ends of the valve body 1 are respectively connected with an air inlet pipe section 16 and an air exhaust pipe section 17; one end of the valve plate 2 is rotationally fixed on the valve body 1 through a valve plate rotating shaft 4; the retainer ring 3 is fixed on the inner wall of the valve body 1 in an annular shape, the fixed connecting seat 6 is fixed at the top of the retainer ring 3, and the hydraulic buffer mechanism 5 is fixed at the top of the valve plate 2 and connected with the first connecting rod 7; the first connecting rod 7 is connected with the second connecting rod 8, and the second connecting rod 8 is connected with the fixed connecting seat 6. For example, the hydraulic buffer mechanism 5 and the first link 7 may be rigidly connected, the fixed connection seat 6 and the second link 8 may be hinged, and the first link 7 and the second link 8 may form a hinge connection through a pin. The sealing element is fixed on the valve body 1 and is opposite to the valve plate rotating shaft 4 and used for assisting sealing when the valve plate 2 is closed.

As shown in fig. 4 and 5, the hydraulic cushion mechanism 5 may include a housing 9, a transmission gear 10, a rack plunger 11, a return spring 12, a check valve 13, and a throttle valve spool 14. In which a cavity 91, a gear chamber 92, and a throttle chamber 93 that communicate with each other are formed in the housing 9, and hydraulic oil can circulate in each chamber.

More specifically, the rack plunger 11 is disposed in the cavity 91 and divides the first cavity 91 into a first cavity 18 and a second cavity 19, a through hole is formed on a side wall of the rack plunger 11 facing the second cavity 19, and the check valve 13 is fixedly disposed in the through hole; the return spring 12 is arranged in the first cavity 18, one end of the return spring is fixed on the side wall of the cavity 91, and the other end of the return spring is fixed on the opposite side wall of the rack plunger 11; the transmission gear 10 is arranged in the gear cavity 92 and is rigidly connected with the first connecting rod 7, a gear matched with the transmission gear 10 is formed on the lower side of the rack plunger 11, and the transmission gear 10 can rotate clockwise or anticlockwise under the action of the first connecting rod 7 and drives the rack plunger 11 to move back and forth. In addition, a rubber sealing washer may be disposed between the rotation shaft of the connecting rod 7 and the gear cavity to prevent leakage of hydraulic oil.

The throttle valve spool 14 is disposed in the throttle chamber 93, the throttle chamber 93 communicates with the cavity 91 through the throttle orifice 15, and the throttle valve spool 14 can adjust the size of the throttle orifice 15, thereby adjusting the fluid flowing through the throttle chamber. In addition, the throttle chamber 93 communicates with the gear chamber 92 through a passage.

According to the utility model discloses an embodiment, when the air current passed through valve body 1, valve plate 2 opened automatically under the effect of the pressure differential around the valve (see fig. 4), and valve plate 2 is opened and is driven 7 actions of first connecting rod to make drive gear 10 clockwise rotation, and then drive rack plunger 11 and remove right. The first chamber 18 is now filled with hydraulic oil and the return spring 12 is in a normal or compressed state. During the rightward movement of the rack plunger 11, the return spring 12 is compressed, and the hydraulic oil in the first chamber 18 is pressurized and then flows into the second chamber 19 through the check valve 13.

When the ventilation system stops working, the pressure difference between the front and the back of the valve disappears, the return spring 12 releases elastic potential energy, the rack plunger 11 is pushed leftwards by the elastic force, the transmission gear 10 and the first connecting rod 7 are driven to rotate anticlockwise (see the attached drawing 5), and the valve plate 2 is closed. During the release of the return spring 12, the hydraulic oil in the chamber 19 is compressed and the non-return valve 13 is closed. The hydraulic oil can be returned to the gear chamber 92 and the first chamber 18 only through the gap between the housing 9 and the rack plunger 11 and the flow passage communicating with the orifice 15. The damping effect is achieved because the hydraulic oil in the second chamber 19 constitutes resistance to the release of the return spring 12. The opening area of the small throttling hole 15 can be changed by adjusting the position of the throttling valve core 14, and the closing speed of the valve plate 2 can be controlled by influencing the flow resistance.

In addition, since the compressed return spring 12 is gradually restored, the force to which the valve plate 2 is subjected during the closing process is gradually reduced. When the valve plate 2 is closed to the edge of the arc-shaped sealing member 20, the air duct sealing function can be realized, and then the valve plate 2 gradually recovers to a completely closed state, namely the sealing member 20 can play an auxiliary sealing role.

Although the present application has been described in terms of embodiments, those of ordinary skill in the art will recognize that there are numerous variations and modifications of the present application without departing from the spirit of the application, and it is intended that the appended claims encompass such variations and modifications without departing from the spirit of the application.

Claims

1. A hydraulic slow-closing type air pipe check valve, comprising: the valve comprises a valve body (1), a valve plate (2), a retainer ring (3), a fixed connecting seat (6), a first connecting rod (7) and a second connecting rod (8), and is characterized by further comprising a hydraulic buffer mechanism (5);

the rack plunger (11) is arranged in the cavity (91) and divides the first cavity (91) into a first cavity (18) and a second cavity (19), a through hole is formed in the side wall, facing the second cavity (19), of the rack plunger (11), and the check valve (13) is fixedly arranged in the through hole; the return spring (12) is arranged in the first cavity (18), one end of the return spring is fixed on the side wall of the cavity (91), and the other end of the return spring is fixed on the opposite side wall of the rack plunger (11); the transmission gear (10) is disposed in the gear chamber (92), and a gear that is fitted to the transmission gear (10) is formed on the lower side of the rack plunger (11).

2. The hydraulic slow-closing type air pipe check valve according to claim 1, characterized by further comprising a throttle valve core (14) arranged in the throttle chamber (93), wherein the throttle chamber (93) is communicated with the cavity (91) through a throttle small hole (15), and the throttle valve core (14) can adjust the size of the throttle small hole (15).

3. The hydraulic slow-closing type air pipe check valve as claimed in claim 1, further comprising a valve plate rotating shaft (4), wherein one end of the valve plate (2) is rotatably fixed on the valve body (1) through the valve plate rotating shaft (4).

4. The hydraulic slow-closing type air pipe check valve according to claim 1, characterized in that when the valve plate is in a closed state, the return spring (12) is in a normal state or a compressed state; the return spring (12) is in a compressed state when the valve plate is in an open state.

5. The hydraulic slow-closing type air pipe check valve according to claim 1, wherein the buffer mechanism (5) is rigidly connected with the first connecting rod (7), the fixed connecting seat (6) is hinged with the second connecting rod (8), and the first connecting rod (7) and the second connecting rod (8) form a hinged connection through a pin shaft.

6. The hydraulic slow-closing type air pipe check valve according to claim 1, further comprising a sealing member (20) fixedly arranged on the valve body (1) for assisting sealing when the valve plate (2) is closed.