CN215596484U

CN215596484U - Suck-back prevention check valve

Info

Publication number: CN215596484U
Application number: CN202120441391.6U
Authority: CN
Inventors: 丁笑鹏
Original assignee: Shengzhou Jiuchun Electric Appliance Co ltd
Current assignee: Shengzhou Jiuchun Electric Appliance Co ltd
Priority date: 2021-03-01
Filing date: 2021-03-01
Publication date: 2022-01-21
Anticipated expiration: 2031-03-01

Abstract

The utility model relates to the technical field of check valves, in particular to an anti-suck-back check valve which comprises a mounting plate, a connecting cylinder, a connecting rod and a torsion spring, wherein a through hole is formed in a base surface of the mounting plate, the connecting cylinder is fixedly arranged on the base surface of the mounting plate at the periphery of the through hole, the base surface of the connecting cylinder is fixedly connected with a first mounting groove, a second mounting groove is fixedly arranged on the inner side of the first mounting groove, a first wind shield is arranged on the left side in the through hole, a first mounting sleeve is arranged on the right side of the first wind shield, the integral device is simple in structure, the phenomenon that smoke in a public smoke exhaust pipeline flows back due to a gap between the baffle and the device when the baffle is not used is effectively avoided, meanwhile, when the reverse suck-back force is applied to the device, the device can be attached to the public smoke exhaust pipeline more tightly along with the increase of suck-back resistance, the smoke can be effectively prevented from suck-back, and the high efficiency and the stability of the device are greatly improved, has certain popularization value.

Description

Suck-back prevention check valve

Technical Field

The utility model relates to the technical field of check valves, in particular to an anti-suck-back check valve.

Background

The check valve is a valve whose opening and closing member is a circular valve clack and acts by self weight and medium pressure to block medium backflow, belonging to the automatic valve class, also called check valve, one-way valve, backflow valve or isolating valve, the check valve is needed to be used on the smoke exhaust pipe of the kitchen ventilator, because one end of the smoke exhaust pipe of the smoke ventilator needs to be connected into the public smoke exhaust pipe of the whole building, when smoke flows in the public smoke exhaust pipe, the traditional check valve easily enables the smoke in the pipe to flow back into the smoke exhaust pipe through the gap generated between the baffle plate and the equipment, so that the smoke can be smelled when the kitchen does not cook, the clean environment in the kitchen is greatly influenced, meanwhile, the traditional check valve can only bear very weak direction check torque, when the suck-back force is too large, the backflow of the smoke in the pipe is easily caused, and therefore, the suck-back prevention check valve is needed to improve the problems.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a back suction prevention check valve, which solves the above problems of the prior art.

In order to achieve the purpose, the utility model provides the following technical scheme: a suck-back prevention check valve comprises a mounting plate, a connecting cylinder, a connecting rod and a torsion spring, wherein a through hole is formed in a base surface of the mounting plate, the periphery of the through hole is positioned on the base surface of the mounting plate and fixedly provided with the connecting cylinder, the base surface of the connecting cylinder is fixedly connected with a first mounting groove, a second mounting groove is fixedly arranged at the inner side of the first mounting groove, a first wind deflector is arranged at the left side in the through hole, a first mounting sleeve is arranged at the right side of the first wind deflector, a second wind deflector is fixedly arranged at the right side of the inner side of the through hole, a second mounting sleeve is fixedly arranged at the left side of the second wind deflector, annular stoppers are fixedly arranged at the inner sides of the first wind deflector and the second wind deflector, the centers of the upper end and the lower end of the inner side of the through hole are fixedly provided with the connecting rod, a fixing rod is fixedly arranged at the back of the inner side of the connecting rod, and the torsion spring is sleeved on the periphery of the fixing rod, and the back surface of the mounting plate is clamped with a sealing strip.

Preferably, the mounting plate is provided with a plurality of groups of threaded mounting holes, and the back of the mounting plate is provided with a rectangular annular groove.

Preferably, the first mounting sleeve and the second mounting sleeve are sleeved on the periphery of the connecting rod.

Preferably, the first wind deflector and the second wind deflector are fixedly connected through a first mounting sleeve and a second mounting sleeve.

Preferably, the torsion bars at the bottom end and the top end of the torsion spring are respectively attached to the first wind deflector and the second wind deflector.

Compared with the prior art, the utility model has the beneficial effects that:

1. in the utility model, through the arrangement of the first wind shield and the second wind shield, the annular stop block, the connecting rod, the fixing rod, the torsion spring and the sealing strip, when the smoke exhaust pipe of the range hood is matched for use, the mounting plate is fixed on the public smoke exhaust pipeline through the threaded mounting hole on the mounting plate, the mounting plate is attached to the public smoke exhaust pipeline, the through hole penetrates through the public smoke exhaust pipeline, the sealing strip can effectively enhance the connection sealing property of the mounting plate when the mounting plate is attached, smoke is prevented from scattering from the mounting gap, then the smoke exhaust pipe of the range hood is selected from the first mounting groove or the second mounting groove according to the size for connection and installation, when the oil smoke sucked by the range hood reaches the first wind shield and the second wind shield in the through hole through the smoke exhaust pipe, the first wind shield and the second wind shield can rotate through the connecting rod due to the rising resistance of the smoke, make first deep bead and second deep bead open, in passing through the through-hole with the oil smoke and discharging into public exhaust pipe, when lampblack absorber stop work, first deep bead can tightly laminate on annular dog through torque spring's support torsion, make first deep bead and second deep bead be in the closure state when the normality, the space of effectively avoiding the baffle to produce when not using and between the device leads to the flue gas backward flow in the public exhaust pipe, simultaneously when reverse suck-back effect and device, the laminating of first deep bead and second deep bead and annular dog is more tight along with the increase of suck-back resistance, effectively prevent the flue gas suck-back, the high efficiency and the stability of device have been improved greatly.

Drawings

FIG. 1 is an overall front view of the present invention;

FIG. 2 is a schematic view of the overall back structure of the present invention;

FIG. 3 is a schematic structural view of a connecting rod, a fixing rod and a torsion spring according to the present invention;

FIG. 4 is a schematic view of a first windshield of the present invention;

FIG. 5 is a schematic view of a second wind deflector according to the present invention;

fig. 6 is an overall side view of the utility model.

In the figure: 1. mounting a plate; 2. a connecting cylinder; 3. a first mounting groove; 4. a second mounting groove; 5. a first windshield; 6. a second wind deflector; 7. an annular stop block; 8. a first mounting sleeve; 9. a second mounting sleeve; 10. a connecting rod; 11. fixing the rod; 12. a torsion spring; 13. a sealing strip; 14. and a through hole.

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.

Referring to fig. 1-6, the present invention provides a technical solution: a suck-back prevention check valve comprises a mounting plate 1, a connecting cylinder 2, a connecting rod 10 and a torsion spring 12, wherein a plurality of groups of threaded mounting holes are formed in the mounting plate 1, a rectangular annular groove is formed in the back surface of the mounting plate 1, a through hole 14 is formed in the base surface of the mounting plate 1, the connecting cylinder 2 is fixedly arranged on the periphery of the through hole 14 and is positioned on the base surface of the mounting plate 1, a first mounting groove 3 is fixedly connected to the base surface of the connecting cylinder 2, a second mounting groove 4 is fixedly arranged on the inner side of the first mounting groove 3, a first wind shield 5 is arranged on the left side inside the through hole 14, the mounting plate 1 is fixed on a public smoke exhaust pipeline through the arranged first wind shield 5, the annular wind shield 7, the connecting rod 10, the fixing rod 11, the torsion spring 12 and a sealing strip 13 when the check valve is matched with a smoke exhaust pipe of a range hood for use, the mounting plate 1 is firstly fixed on the public smoke exhaust pipeline through the threaded mounting plate 1, the mounting plate 1 is jointed with the public smoke exhaust pipeline, the through hole 14 penetrates through the public smoke exhaust pipeline, the sealing strip 13 can effectively enhance the connection sealing performance of the mounting plate 1 when the mounting plate 1 is attached, smoke is prevented from scattering from an installation gap, then a smoke exhaust pipe of the range hood is selected from the first mounting groove 3 or the second mounting groove 4 according to the size of the smoke exhaust pipe to be connected and installed, when oil smoke sucked by the range hood reaches the first wind shield 5 and the second wind shield 6 in the through hole 14 through the smoke exhaust pipe, the first wind shield 5 and the second wind shield 6 can rotate through the connecting rod 10 due to the resistance of smoke rising, the first wind shield 5 and the second wind shield 6 are opened, the oil smoke is exhausted into the public smoke exhaust pipeline through the through hole 14, when the range hood stops working, the first wind shield 5 and the second wind shield 6 can be tightly attached to the annular stop dog 7 through the support of the torque spring 12, and the first wind shield 5 and the second wind shield 6 are in a closed state in a normal state, the flue gas backflow in a public exhaust flue is effectively avoided due to the gap between the baffle and the device when the baffle is not used, meanwhile, when reverse suck-back force is applied to the device, the attaching force of the first wind shield 5, the second wind shield 6 and the annular stop 7 is attached to be tighter along with the increase of suck-back resistance, the flue gas backflow is effectively prevented, the high efficiency and the stability of the device are greatly improved, the first wind shield 5 and the second wind shield 6 are fixedly connected with the second mounting sleeve 9 through the first mounting sleeve 8, the first mounting sleeve 8 is mounted on the right side of the first wind shield 5, the first mounting sleeve 8 and the second mounting sleeve 9 are sleeved on the periphery of the connecting rod 10, the second wind shield 6 is fixedly mounted on the right side of the inner side of the through hole 14, the second mounting sleeve 9 is fixedly mounted on the left side of the second wind shield 6, the annular stop 7 is fixedly mounted on the inner side of the first wind shield 5 and the base plane of the second wind shield 6 which are positioned in the through hole 14, both ends center department fixed mounting has connecting rod 10 about 14 inboards of through-hole, 14 inboards of through-hole are located connecting rod 10 back fixed mounting has dead lever 11, dead lever 11 periphery cover is established and is installed torque spring 12, torque spring 12 bottom and the torque rod on top laminate respectively on first deep bead 5 and second deep bead 6, sealing strip 13 has been clamped at the mounting panel 1 back, the overall structure of the device is simple, effectively avoid the baffle to lead to the flue gas backward flow in the public exhaust pipe when not using with the space that produces between the device, simultaneously when reverse suck-back effect and device, the device can be along with the increase of suck-back resistance and the laminating is tighter, effectively prevent the flue gas suck-back, the high efficiency and the stability of device have been improved greatly, certain spreading value has.

The working process of the utility model is as follows: when the smoke exhaust ventilator is used, the mounting plate 1 is fixed on a public smoke exhaust pipeline through a threaded mounting hole on the mounting plate 1 by the aid of the first wind shield 5 and the second wind shield 6, the annular stop block 7, the connecting rod 10, the fixing rod 11, the torsion spring 12 and the sealing strip 13 when the smoke exhaust ventilator is matched with a smoke exhaust pipeline of the smoke exhaust ventilator for use, the mounting plate 1 is attached to the public smoke exhaust pipeline, the through hole 14 penetrates through the public smoke exhaust pipeline, the sealing strip 13 can effectively enhance connection sealing performance of the mounting plate 1 when the mounting plate 1 is attached to the mounting plate 1, smoke is prevented from scattering from an installation gap, the smoke exhaust pipeline of the smoke exhaust ventilator is selected from the first mounting groove 3 or the second mounting groove 4 according to size for connection and installation, when smoke absorbed by the smoke exhaust ventilator reaches the first wind shield 5 and the second wind shield 6 in the through the smoke exhaust pipeline, the first wind shield 5 and the second wind shield 6 can rotate through the connecting rod 10 due to resistance of rising of smoke, the first wind shield 5 and the second wind shield 6 are opened, oil smoke is discharged into a public exhaust pipeline through the through hole 14, when the range hood stops working, the first wind shield 5 and the second wind shield 6 can be tightly attached to the annular stop dog 7 through the supporting torsion of the torsion spring 12, the first wind shield 5 and the second wind shield 6 are in a closed state in a normal state, smoke backflow in the public exhaust pipeline caused by a gap between the baffle and the device when the range hood is not used is effectively avoided, meanwhile, when reverse suck-back force is applied to the device, the attaching force of the first wind shield 5, the second wind shield 6 and the annular stop dog 7 can be attached to be tighter along with the increase of suck-back resistance, smoke backflow is effectively prevented, the efficiency and the stability of the device are greatly improved, the structure of the whole device is simple, the smoke backflow in the public exhaust pipeline caused by the gap between the baffle and the device when the baffle is not used is effectively avoided, simultaneously when reverse suck-back effect and device, the device can be along with suck-back resistance's increase and the laminating is tighter, prevents effectively that the flue gas from suck-back, has improved the high efficiency and the stability of device greatly, has certain spreading value.

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 utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a prevent suck-back check valve, includes mounting panel (1), connecting cylinder (2), connecting rod (10) and torsion spring (12), its characterized in that: through-hole (14) has been seted up to mounting panel (1) base face, through-hole (14) periphery is located mounting panel (1) base face fixed mounting has connecting cylinder (2), connecting cylinder (2) base face fixedly connected with first mounting groove (3), the inboard fixed mounting of first mounting groove (3) has second mounting groove (4), first deep bead (5) are installed to the inside left side of through-hole (14), first installation sleeve (8) are installed on first deep bead (5) right side, through-hole (14) inboard right side fixed mounting has second deep bead (6), second deep bead (6) left side fixed mounting has second installation sleeve (9), first deep bead (5) and second deep bead (6) base face are located through-hole (14) inboard fixed mounting has annular dog (7), both ends center department fixed mounting has connecting rod (10) about through-hole (14) inboard, the through hole (14) inboard is located connecting rod (10) back fixed mounting and has dead lever (11), dead lever (11) periphery cover is established and is installed torque spring (12), mounting panel (1) back card is equipped with sealing strip (13).

2. An anti-suck back check valve as defined in claim 1, wherein: the mounting plate (1) is provided with a plurality of groups of threaded mounting holes, and the back of the mounting plate (1) is provided with a rectangular annular groove.

3. An anti-suck back check valve as defined in claim 1, wherein: the first mounting sleeve (8) and the second mounting sleeve (9) are sleeved on the periphery of the connecting rod (10).

4. An anti-suck back check valve as defined in claim 1, wherein: the first wind shield (5) and the second wind shield (6) are fixedly connected with each other through a first mounting sleeve (8) and a second mounting sleeve (9).

5. An anti-suck back check valve as defined in claim 1, wherein: the bottom end and the torsion bar at the top end of the torsion spring (12) are respectively attached to the first wind shield (5) and the second wind shield (6).