CN216479096U

CN216479096U - A high seal valve clack structure for fire prevention check valve

Info

Publication number: CN216479096U
Application number: CN202122553473.2U
Authority: CN
Inventors: 聂法玉; 谭源生
Original assignee: GUANGZHOU CAIDIE ENERGY-SAVING TECHNOLOGY CO LTD
Current assignee: GUANGZHOU CAIDIE ENERGY-SAVING TECHNOLOGY CO LTD
Priority date: 2021-10-22
Filing date: 2021-10-22
Publication date: 2022-05-10
Anticipated expiration: 2031-10-22

Abstract

The utility model provides a high-tightness valve clack structure for a fireproof check valve, which comprises a valve clack, a connecting seat, an upper hinge, a rocker arm and a lower hinge, wherein the connecting seat is arranged in the middle of the valve clack, the upper end of the rocker arm is movably connected with the valve clack through the upper hinge, the lower end of the rocker arm is arranged on a valve shell of the fireproof check valve through the lower hinge, an upper baffle block for limiting is arranged at the upper end of the rocker arm, the upper baffle block is positioned at the upper side of the upper hinge, the upper baffle block is used for limiting the valve clack to rotate around the upper hinge in the forward direction, and the rocker arm is used for limiting the valve clack to rotate around the upper hinge in the reverse direction, so that the valve clack can rotate around the upper hinge within a set angle range to form self-adaptive optimal sealing fit with a valve seat of the fireproof check valve. The valve clack can freely rotate around the upper hinge in the closing process, so that an optimal binding surface is formed between the valve clack and the valve seat, and the sealing effect is good.

Description

A high seal valve clack structure for fire prevention check valve

Technical Field

The utility model belongs to the technical field of fireproof check valves, and particularly relates to a high-airtightness valve clack structure for a fireproof check valve.

Background

The fire-proof check valve is one of the important components of the residential exhaust duct system, and the main functions of the fire-proof check valve are divided into the following three aspects:

1) flow guiding function: the smoke in the house is guided to be organically discharged upwards into the house exhaust duct and finally discharged from the roof, so that the high-altitude discharge is realized. The air curtain and the vortex are prevented from being formed at the air inlet of the residential exhaust passage, and the smoke discharge resistance is reduced.

2) Check function: when the smoke is discharged, the valve clack is opened under the pushing of the wind power of the range hood or the exhaust fan, and the smoke is allowed to flow into the exhaust passage; when the smoke discharge is stopped, the valve clack is automatically closed under the action of gravity/spring force, so that the smoke backflow is prevented, and the smoke and odor mixing phenomena are avoided.

3) Fireproof effect: in case of fire, when the temperature rises to a specified value, the fire-proof executing mechanism acts to force the valve clack to be forcibly closed and locked in a closed state, so that the spread of smoke and fire is avoided, and the fire-proof safety is ensured.

For example, chinese patent application 201710147354.2 discloses a fire check valve, which solves the problem that the fire check valve loses the smoke-isolating effect in a high-temperature environment. A fireproof check valve comprises a valve body, a valve block, a connecting rod, a shifting piece, a temperature sensing element and an elastic element, wherein an exhaust port is formed in the valve body, the valve block is covered on the exhaust port and is connected with the valve body through the connecting rod, the shifting piece is rotatably connected with the valve body, the temperature sensing element is fixed on the valve body, one end of the elastic element is fixedly connected with the valve body, the other end of the elastic element is connected with the shifting piece and drives the shifting piece to abut against the temperature sensing element, a clamping part is formed in the shifting piece, and a clamping matching part is formed in the connecting rod; when the elastic element drives the shifting sheet to rotate relative to the valve body and extrudes the connecting rod, so that the connecting rod closes the exhaust port through the valve sheet, the clamping part is matched with the clamping matching part to prevent the connecting rod from rotating relative to the valve body.

For another example, chinese patent application 201821290666.5 discloses a locking structure and water conservancy diversion formula flue fire prevention check valve for fire prevention check valve, belong to valve technical field, including setting up base and the elastic element in the valve body, be provided with the movable connecting rod on the base, one side of base articulates there is the retaining member, elastic element is fixed in on the articulated shaft of retaining member and drives the retaining member and offset with the movable connecting rod, the one end of retaining member articulates there is the connecting piece that can stretch out and link firmly from the valve body, the articulated shaft that is used for articulated connecting piece adopts low melting point alloy fuse.

The fixed connection between the rocker arm and the flap of the prior art fire check valve is usually adopted, and the connection point is located at the edge position of the flap (for example, the lower edge, the upper edge or the side edge of the flap). When the valve clack is closed under the action of spring force/gravity, the stress point is located at a certain local point of the edge of the valve clack, the phenomena that stress is uneven at other positions of the edge of the valve clack or even the edge of the valve clack is tilted are often caused, and the defects that the sealing property of the valve clack is poor and smoke leakage and air leakage are caused exist.

Therefore, improvements are needed.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model provides the high-tightness valve clack structure for the fireproof check valve, the valve clack can freely rotate around the upper hinge in the closing process, the optimal binding surface is formed between the valve clack and the valve seat, and the sealing effect is good.

In order to achieve the purpose, the utility model provides a high-tightness valve clack structure for a fireproof check valve, which comprises a valve clack, a connecting seat, an upper hinge, a rocker arm and a lower hinge, wherein the connecting seat is arranged in the middle of the valve clack, the upper end of the rocker arm is movably connected with the valve clack through the upper hinge, the lower end of the rocker arm is arranged on a valve shell of the fireproof check valve through the lower hinge, an upper baffle block for limiting is arranged at the upper end of the rocker arm, the upper baffle block is positioned above the upper hinge, the valve clack is limited to rotate around the upper hinge in the forward direction by the upper baffle block, and the valve clack is limited to rotate around the upper hinge in the reverse direction by the rocker arm, so that the valve clack can rotate around the upper hinge within a set angle range to form self-adaptive optimal sealing fit with a valve seat of the fireproof check valve.

As another embodiment of the present invention, the predetermined angular range of the free rotation of the valve flap about the upper hinge is ± 5 °.

As another embodiment of the present invention, the predetermined angular range of the free rotation of the valve flap about the upper hinge is ± 2 °.

As another specific embodiment of the utility model, a sealing ring is arranged at the position, matched with the valve seat of the fireproof check valve, of the valve clack.

As another specific embodiment of the present invention, the connecting seat includes a base and two connecting lugs, the base is fixedly connected with the valve flap, the connecting lugs are provided with connecting holes, the rocker arm is provided with through holes, the upper hinge includes at least one connecting pin, and the connecting pin is arranged to pass through the two connecting holes and the through holes.

As another specific embodiment of the utility model, the rocker arm comprises two side wall plates, and the through holes are arranged on the two side wall plates, wherein the two assembled side wall plates are positioned between the two connecting lugs, and the adjacent side wall plates are in contact with the connecting lugs so as to form a limit along the axial direction of the connecting pin.

As another specific embodiment of the utility model, the rocker arm is provided with a lower stop block for limiting the reverse rotation of the valve clack around the upper hinge, and the lower stop block is positioned on the lower side of the upper hinge.

As another specific embodiment of the utility model, the distance that the upper stop block and the lower stop block protrude from the rocker arm is adjustable, so that the preset angle range of the valve clack which freely rotates around the upper hinge is changed.

The utility model has the following beneficial effects:

the valve clack can freely rotate around the upper hinge in the closing process, and meanwhile, the valve clack is limited by the rocker arm and the upper stop block on the rocker arm, so that the valve clack has a small-range rotating space, the valve clack can rotate around the upper hinge within a set angle range to form self-adaptive optimal sealing fit with a valve seat of the fireproof check valve, namely an optimal binding surface is formed, and the sealing effect is obviously improved.

The present invention will be described in further detail with reference to the accompanying drawings.

Drawings

FIG. 1 is a first schematic structural view of a fire check valve according to embodiment 1 of the present invention;

FIG. 2 is a schematic structural diagram II of the fireproof check valve in embodiment 1 of the present invention;

FIG. 3 is a schematic view of the construction of a valve flap device according to embodiment 1 of the present invention;

FIG. 4 is a schematic view showing the connection at the hinge in embodiment 1 of the present invention;

fig. 5 is a schematic structural view of a rocker arm according to embodiment 1 of the present invention.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the utility model will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited to the specific embodiments disclosed below.

Example 1

The present invention provides a high-sealability flap structure 100 for a fire check valve, as shown in fig. 1-2, having a valve seat 200 and a valve housing 300, the flap structure 100 being mounted on the valve housing 300 and cooperating with the valve seat 200.

As shown in fig. 3-5, the valve flap structure 100 includes a valve flap 110, a connection seat 120, an upper hinge 130, a rocker arm 140, and a lower hinge 150;

the coupling seat 120 is provided at the middle portion of the valve flap 110, the upper end of the swing arm 140 is movably coupled to the coupling seat 120 by an upper hinge 130, the lower end of the swing arm 140 is provided on the valve housing 300 by a lower hinge 150,

specifically, as shown in fig. 4, the connection seat 120 includes a base 121 and two connection lugs 122, the base 121 is fixedly connected to the valve flap 110, the connection lugs 122 are provided with connection holes 123, the swing arm 140 is provided with through holes 141, the upper hinge 130 includes at least one connection pin 131, and the connection pin 131 is configured to pass through the two connection holes 123 and the through holes 141.

Further, the swing arm 140 includes two side wall plates 142, each of the side wall plates 142 is provided with a through hole 141, wherein the two assembled side wall plates 142 are located between the two engaging lugs 122, and the adjacent side wall plates 142 and the engaging lugs 122 are contacted to form a limit position along the axial direction of the connecting pin 131, and the connecting socket 120 can rotate around the connecting pin 131.

As shown in fig. 5, the upper stopper 143 is located above the upper hinge 130, the lower stopper 144 is located below the upper hinge 130, the upper stopper 143 limits the forward rotation of the valve flap 110 about the upper hinge 130, and the lower stopper 144 limits the reverse rotation of the valve flap 110 about the upper hinge 130, so that the valve flap 110 can rotate about the upper hinge 130 within a predetermined angle range to form a self-adaptive optimal sealing fit with the valve seat 200.

Compared with the scheme of fixed connection between the rocker arm and the connecting seat in the prior art, the air leakage phenomenon caused by uneven stress on the edge of the valve clack and poor fitting degree due to rigid matching in the prior art can be eliminated by the embodiment.

Specifically, the distance that the upper stop 143 and the lower stop 144 protrude from the rocker arm 140 is adjustable, so as to change the preset angle range of the free rotation of the valve flap 110 around the upper hinge 130; preferably, the predetermined angular range of the free rotation of the valve flap 110 about the upper hinge 130 is ± 5 °, and more preferably, the predetermined angular range of the free rotation of the valve flap 110 about the upper hinge 130 is ± 2 °.

Further, a sealing ring 111 is arranged at the matching position of the valve clack 110 and the valve seat 200 to form a good sealing effect.

In this embodiment, the valve flap 110 can freely rotate around the upper hinge 130 during the closing process, and meanwhile, the valve flap 110 is limited by the upper stop 143 and the lower stop 144 on the rocker 140, so that the valve flap has a small rotation space, and therefore the valve flap 110 can rotate around the upper hinge 130 within a set angle range to form a self-adaptive optimal sealing fit with the valve seat 200, that is, an optimal attachment surface is formed, the occurrence of smoke leakage and air leakage can be effectively avoided, and a good sealing effect can be maintained for a long time.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the scope of the utility model. It will be appreciated by those skilled in the art that changes may be made without departing from the scope of the utility model, and it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

Claims

1. A high-tightness valve clack structure for a fireproof check valve is characterized by comprising a valve clack, a connecting seat, an upper hinge, a rocker arm and a lower hinge, the connecting seat is arranged in the middle of the valve clack, the upper end of the rocker arm is movably connected with the valve clack through the upper hinge, the lower end of the rocker arm is arranged on a valve shell of the fireproof check valve through the lower hinge, wherein the upper end of the rocker arm is provided with an upper stop block for limiting, the upper stop block is positioned above the upper hinge, the valve clack is limited to rotate around the upper hinge in the forward direction by the upper stop block, the valve clack is limited to rotate around the upper hinge in the reverse direction by the rocker arm, so that the valve flap can rotate around the upper hinge within a set angle range to form an adaptive optimal sealing fit with the valve seat of the fire check valve.

2. The high-tightness flap structure for a fire check valve of claim 1, wherein the predetermined angular range of the free rotation of said flap about said upper hinge is ± 5 °.

3. The high-tightness flap structure for a fire check valve according to claim 2, wherein the predetermined angle range of the free rotation of the flap about the upper hinge is ± 2 °.

4. The high-tightness flap structure for a fire check valve as claimed in claim 1, wherein a sealing ring is provided on said flap.

5. The structure of claim 1, wherein the connecting seat comprises a base and two connecting lugs, the base is fixedly connected to the valve flap, the connecting lugs are provided with connecting holes, the rocker arm is provided with through holes, and the upper hinge comprises at least one connecting pin, the connecting pin is configured to pass through the two connecting holes and the through holes.

6. The high-tightness flap structure for a fire check valve according to claim 5, wherein said rocker arm comprises two side wall plates, said perforations being provided on both of said side wall plates, wherein two of said side wall plates after assembly are located between two of said coupling lugs, and contact is made between adjacent ones of said side wall plates and said coupling lugs to form a stopper in an axial direction of said coupling pin.

7. The high-tightness flap structure for a fire check valve according to claim 1, wherein a lower stopper for restricting the reverse rotation of said flap about said upper hinge is provided on said rocker arm, said lower stopper being located on a lower side of said upper hinge.

8. The high-tightness flap structure for a fire check valve of claim 7, wherein the distance of the upper and lower stoppers protruding from the rocker arm is adjustable, thereby changing the preset angle range of the free rotation of the flap around the upper hinge.