CN217207934U

CN217207934U - Flue fire-proof check valve

Info

Publication number: CN217207934U
Application number: CN202221178026.1U
Authority: CN
Inventors: 陆爱平
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-05-13
Filing date: 2022-05-13
Publication date: 2022-08-16
Anticipated expiration: 2032-05-13

Abstract

The application discloses flue fire prevention check valve, which comprises a valve seat, the valve gap, non return mechanism and response mechanism, what the valve gap can open sets up on the disk seat, non return mechanism includes fixed part and movable part, the fixed part sets up on the disk seat of valve gap one side, the movable part is suitable for to use the fixed part to swing to the valve gap top from the disk seat as the center, be suitable for when the movable part swings to the valve gap top to prevent the valve gap to open, response mechanism sets up on the disk seat, response mechanism is suitable for to fix the movable part on the disk seat, response mechanism is suitable for and removes the fixed to the movable part when sensing ambient temperature is too high, this check valve compact structure is stable, high durability and convenient installation, the non return seals effectually, non return mechanism and valve gap are difficult to be heated the pressurized and lead to the flue gas to reveal when triggering.

Description

Flue fire-proof check valve

Technical Field

The application relates to the technical field of fire-fighting equipment, in particular to a flue fire-proof check valve.

Background

The flue fireproof check valve is a valve cover which is arranged at the inlet of a common exhaust duct with fire resistance grade, such as the rear end of a kitchen range hood or a toilet exhaust fan, is in an open state (for exhausting waste gas) when the fan works, is in a natural closed state (for preventing waste gas from flowing back) when the fan does not work, can be automatically closed when the temperature in a room or a common air duct reaches a specified value, can meet the requirement of fire resistance performance within specified time, and plays a role in smoke isolation and fire retardance.

However, the existing flue fireproof check valve has the following defects: common non return structure is slide bar formula enclosed construction, and the slide bar passes through the elasticity of spring and removes to the latched position, and behind the slide bar slip lock valve gap, the valve gap receives the elasticity that pressure may overcome the spring and opens, and the spring can be because of being heated the elasticity decline that appears simultaneously to the locking ability that leads to the slide bar further reduces, leads to the flue gas to take place to reveal.

Disclosure of Invention

An aim at of this application provides a compact structure is stable, simple to operate, is heated the difficult flue fire prevention check valve that takes place the flue gas and reveal of pressurized.

In order to achieve the above purposes, the technical scheme adopted by the application is as follows: a flue fireproof check valve comprises a valve seat, a valve cover, a check mechanism and a sensing mechanism, wherein the valve cover is arranged on the valve seat in an openable mode, the check mechanism comprises a fixed portion and a movable portion, the fixed portion is arranged on the valve seat on one side of the valve cover, the movable portion is suitable for swinging from the valve seat to the position above the valve cover by taking the fixed portion as the center, the movable portion is suitable for preventing the valve cover from being opened when swinging to the position above the valve cover, the sensing mechanism is arranged on the valve seat, the sensing mechanism is suitable for fixing the movable portion on the valve seat, and the sensing mechanism is suitable for releasing the movable portion when sensing that the ambient temperature is too high.

As an improvement, the induction mechanism comprises a support and a positioner, wherein a temperature sensing piece is arranged on the support, the positioner is fixed on the support, the positioner is suitable for preventing the movable part from swinging, the temperature sensing piece is suitable for fusing when sensing that the ambient temperature is too high, and the positioner is suitable for releasing the fixation of the movable part when the temperature sensing piece fuses.

As an improvement, the plane of the temperature sensing piece is intersected with the plane of the positioner, and one side of the temperature sensing piece is in butt joint with the positioner.

As an improvement, the positioner comprises a clamping portion and a positioning portion, the clamping portion is clamped with the bracket, the clamping portion is suitable for being matched with the temperature sensing piece to fix the positioner, the positioning portion is suitable for clamping and positioning the movable portion, and the front end of the positioning portion is obliquely bent towards the swinging direction of the movable portion; the support is provided with a limiting groove, and the limiting groove is suitable for being matched with the clamping portion to fix the movable portion.

As an improvement, a first bending portion is arranged on the movable portion, and when the movable portion swings to the position above the valve cover, the first bending portion is suitable for abutting against the valve cover.

As an improvement, a protruding part is arranged on the valve cover and is suitable for being matched and abutted against the first bending part.

As an improvement, a second bending part is arranged between the movable part and the fixed part, the second bending part is bent towards the outer side of the valve cover, and when the movable part is connected with the sensing mechanism, the second bending part is suitable for preventing the movable part from contacting the valve cover.

As an improvement, a positioning device is further arranged on the valve seat and comprises a positioning seat, and the positioning seat is suitable for clamping and fixing the movable part.

As an improvement, a guide part is arranged at the top of the positioning seat, the front end of the guide part is bent upwards, and the movable part is suitable for entering the positioning seat along the guide part.

As an improvement, the swing plane of the movable part is parallel to the plane of the valve seat, the fixed part is rotatably connected with the valve seat, the fixed part is perpendicular to the plane of the valve seat, and the fixed part is provided with an elastic resetting piece which is suitable for enabling the movable part to swing above the valve seat; one side of the valve cover is rotatably connected with the valve seat, and the movable part is suitable for swinging from the connection part of the valve cover and the valve seat to enter the position above the valve cover; the valve cover is obliquely arranged on the valve seat, the higher side of the valve cover is close to the fixed part, and the lower side of the valve cover is close to the movable part.

Compared with the prior art, the beneficial effect of this application lies in: through improving the structure of non return mechanism, make non return mechanism behind locking valve gap, can decompose the power of opening the valve gap, when the valve gap receives impact such as air current atmospheric pressure to produce the activity trend, can reduce the external force of the elasticity piece that resets that conducts to non return mechanism, thereby reduce the activity of non return mechanism, increase the stability under the non return mechanism locking state, reduce the probability that takes place to leak, owing to need not set up the baffle isotructure of guide slide bar activity, the structure of non return mechanism is compacter simple, it is also more convenient to install.

Drawings

FIG. 1 is an overall structural view of a check mechanism according to a preferred embodiment of the present application in an initial state;

FIG. 2 is an overall structural view of a check mechanism in a triggered state according to a preferred embodiment of the present application;

FIG. 3 is an enlarged view at a in FIG. 1 according to a preferred embodiment of the present application;

FIG. 4 is a front view of a check mechanism in a triggered state according to a preferred embodiment of the present application;

FIG. 5 is a right side view of a check mechanism in a triggered state according to a preferred embodiment of the present application;

FIG. 6 is a bottom view of a check mechanism in a triggered state according to a preferred embodiment of the present application;

FIG. 7 is an overall structural view provided within an outer housing according to a preferred embodiment of the present application.

In the figure: 1. a valve seat; 11. a vent; 111. a magnet; 2. a valve cover; 21. a boss portion; 22. a seal ring; 3. a non-return mechanism; 31. a fixed part; 32. a movable portion; 321. a first curved portion; 322. a second curved portion; 33. an elastic reset member; 4. An induction mechanism; 41. a support; 411. a limiting groove; 42. a positioner; 421. a clamping part; 422. a positioning part; 43. a temperature sensing tablet; 5. a positioning device; 51. positioning seats; 511. a guide section; 6. an outer housing; 7. a fixed base; 71. and (5) buckling.

Detailed Description

The present application is further described below with reference to specific embodiments, and it should be noted that, without conflict, any combination between the embodiments or technical features described below may form a new embodiment.

In the description of the present application, it should be noted that, for the terms of orientation, such as "central", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., it indicates that the orientation and positional relationship shown in the drawings are based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be construed as limiting the specific scope of protection of the present application.

It is noted that the terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

The terms "comprises," "comprising," and "having," and any variations thereof, in the description and claims of this application, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The present application is further described with reference to the accompanying drawings:

as shown in fig. 1 to 7, a preferred embodiment of the present application includes a valve seat 1, a valve cover 2, a check mechanism 3 and a sensing mechanism 4, wherein the valve cover 2 is openably disposed on the valve seat 1, the check mechanism 3 includes a fixed portion 31 and a movable portion 32, the fixed portion 31 is disposed on the valve seat 1 on one side of the valve cover 2, the movable portion 32 is adapted to swing from the valve seat 1 to above the valve cover 2 with the fixed portion 31 as a center, the movable portion 32 is adapted to prevent the valve cover 2 from opening when swinging to above the valve cover 2, the sensing mechanism 4 is disposed on the valve seat 1, the sensing mechanism 4 is adapted to fix the movable portion 32 on the valve seat 1, and the sensing mechanism 4 is adapted to release the movable portion 32 when sensing that an excessive ambient temperature is high.

With traditional slide bar formula configuration optimization for the non return mechanism 3 of rotation rod-type, the rotation through non return mechanism 3 and conflict with valve gap 2 and realize the locking of valve gap 2, non return mechanism 3 after the optimization need not install the baffle isotructure that sets up the guide slide bar activity, the spare part of required installation still less, the installation is also more laborsaving, because non return mechanism 3 operates through the swing, the swing in-process only moves about in the coplanar, consequently, the space that needs to occupy is also littleer, thereby make the compacter that disk seat 1 can design, installation adaptability is stronger.

The fixed portion 31 is provided with an elastic restoring member 33, the elastic restoring member 33 is adapted to make the movable portion 32 swing upward the valve seat 1, the elastic restoring member 33 is preferably a torsion spring, the torsion spring is sleeved on the fixed portion 31, one end of the torsion spring is fixed on the fixed portion 31, and the other end of the torsion spring extends and is fixed on the second bending portion 322 or the movable portion 32, so that the torsion spring has a restoring tendency, thereby controlling the second bending portion 322 or the movable portion 32 to swing.

The swing plane of the movable part 32 is parallel to the plane of the valve seat 1, the fixed part 31 is connected with the valve seat 1 in a rotating way, the fixed part 31 is perpendicular to the plane of the valve seat 1, when the valve seat 1 is impacted by airflow pressure and the like to generate a moving trend, the valve seat 1 generates a force in an inclined direction to the check mechanism 3, at the moment, the movable part 32 can decompose the force into forces in two horizontal and vertical directions (the plane of the valve seat 1 is a transverse plane), wherein the force in the vertical direction can be transmitted to the fixed part 31 and borne by the fixed part 31, as the fixed part 31 and the movable part 32 are integrally formed, a larger force can be borne in the vertical direction, the transverse force can be borne by the elastic resetting piece 33, when the transverse force overcomes the elastic force of the elastic resetting piece 33, the valve cover 2 is likely to open and leak, and an included angle between the swing plane of the movable part 32 and the direction of the force generated by the valve seat 1 is larger, the force thus received is also smaller, the stability of the valve closure 2 after locking is stronger and the probability of leakage is lower.

Valve gap 2 one side and disk seat 1 rotate to be connected, and movable part 32 is suitable for and swings from the junction of valve gap 2 and disk seat 1 and enters into the valve gap 2 top, and this structural design makes non return mechanism 3 can close valve gap 2 by force when valve gap 2 is opened, and movable part 32 and valve gap 2's trend of motion is unanimous, and it is more smooth and easy to close the locking process.

Valve gap 2 slope sets up on disk seat 1, and the higher side of valve gap 2 is close to fixed part 31, and the lower side of valve gap 2 is close to movable part 32, sets up the motion trend that more accords with movable part 32 like this, further promotes the smooth and easy degree that valve gap 2 closed, reduces elasticity and resets piece 33 and close valve gap 2 in-process need apply force in control movable part 32, avoids elasticity that elasticity resets piece 33 is not enough to be difficult to close valve gap 2.

The valve cover 2 is arranged on the valve seat 1 in a side-opening mode and is provided with an inclination, the valve cover can be automatically closed through self gravity under the condition of no spring stress application, the resistance for opening the valve cover 2 is small, oil smoke can be easily discharged from the valve cover 2 in daily use, the sealing performance and the stability of the valve cover 2 are also stronger when no oil smoke is discharged, and the phenomenon that the valve cover 2 cannot be completely closed after being opened can not occur.

The sensing mechanism 4 comprises a bracket 41 and a retainer 42, a temperature sensing piece 43 is arranged on the bracket 41, the retainer 42 is fixed on the bracket 41 by the temperature sensing piece 43, the retainer 42 is suitable for preventing the movable part 32 from swinging, the temperature sensing piece 43 is suitable for fusing when sensing overhigh ambient temperature, the temperature sensing piece 43 is also called a fuse piece and is made of metal material with lower melting point, fusing can be generated when the temperature exceeds the melting point of the material, the melting point temperature of the fuse piece suitable for the flue fire-proof check valve is generally 70 ℃, the retainer 42 is suitable for releasing the fixing of the movable part 32 when the temperature sensing piece 43 fuses, the temperature sensing piece 43 does not directly fix the movable part 32 of the mechanism 3 but indirectly fixes the movable part by fixing the retainer 42, and due to the limited strength of the temperature sensing piece 43, structural deformation can be generated when the movable part 32 is directly fixed to cause the failure of the check mechanism 3 or early trigger check, the torsional spring that elasticity is stronger can also be used to the setting like this, further promotes the stability to valve gap 2 locking.

The plane of the temperature sensing piece 43 is intersected with the plane of the locator 42, one side of the temperature sensing piece 43 is abutted and clamped with the locator 42, the temperature sensing piece 43 is abutted with the locator 42 in a crossing manner, the fixing capacity of the temperature sensing piece 43 can be improved, deformation is not easy to occur, and the strongest fixing capacity can be obtained when the plane of the temperature sensing piece 43 is perpendicular to the plane of the locator 42.

Locator 42 includes joint portion 421 and location portion 422,

joint portion

421 and 41 joint of support, joint portion 421 is suitable for and temperature sensing piece 43 cooperation fixed locator 42, location portion 422 is suitable for joint location movable part 32, the front end of location portion 422 is crooked to the swing direction slope of movable part 32, joint portion 421 can assist temperature sensing piece 43 fixed locator 42, reduce temperature sensing piece 43's atress, the front end slope of location portion 422 is crooked can reduce the degree of difficulty that movable part 32 breaks away from location portion 422 when temperature sensing piece 43 fuses, make valve gap 2's locking process more accurate smooth and easy fast.

Spacing groove 411 has been seted up on support 41, and spacing groove 411 can the holding movable part 32, and spacing groove 411's opening is towards location portion 422 one side, and spacing groove 411 can be fixed with joint portion 421 cooperation movable part 32, spacing groove 411 can support movable part 32 in the opposite one side of locator 42, avoid movable part 32 to take place to rock, avoid movable part 32 to warp the activity and lead to deviating from to the opposite side of locator 42, promote induction mechanism 4's stability.

Be provided with first flexion 321 on the movable part 32, when the movable part 32 swung to valve gap 2 top, first flexion 321 was suitable for conflict valve gap 2, and first flexion 321 can increase the structural strength of movable part 32, reduces the probability that movable part 32 takes place to warp under the high temperature pressurized circumstances, can also further decompose valve gap 2's power, the dispersion atress.

Be provided with bellying 21 on the valve gap 2, bellying 21 is suitable for the first flexion 321 of cooperation conflict, and bellying 21 can strengthen valve gap 2's structural strength, reduces valve gap 2 compressive deformation's probability, further reduces the probability that the flue gas leaked.

The second bending portion 322 is arranged between the movable portion 32 and the fixed portion 31, the second bending portion 322 bends towards the outer side of the valve cover 2, when the movable portion 32 is connected with the sensing mechanism 4, the second bending portion 322 is suitable for preventing the movable portion 32 from contacting the valve cover 2, the second bending portion 322 does not interfere with the opening of the valve cover 2, and the second bending portion 322 is used for changing the position between the movable portion 32 and the fixed portion 31, so that stress is dispersed, and the force applied to the elastic resetting piece 33 is smaller.

Still be provided with positioner 5 on the valve seat 1, positioner 5 includes positioning seat 51, positioning seat 51 is suitable for the fixed movable part 32 of joint, positioning seat 51 can carry out spacing fixed to movable part 32, it is excessive to avoid the swing of movable part 32, fix movable part 32 to predetermineeing the position, let movable part 32 fix in the most stable locking position, positioning seat 51 can also cooperate fixed part 31 to carry out the atress at the both ends of movable part 32, can bear the power that the valve gap 2 is bigger opened.

The top of positioning seat 51 is provided with guide portion 511, and the front end of guide portion 511 is the bending upwards, and movable part 32 is suitable for along guide portion 511 entering positioning seat 51, and movable part 32 is at the in-process that the guide valve lid 2 closed, and valve lid 2 can exert the ascending power of vertical direction to movable part 32 to lead to movable part 32 to take place slight deformation in the vertical direction, this kind of deformation can be overcome to guide portion 511, lets movable part 32 can get into positioning seat 51 smoothly.

The orientation is buckled to valve gap 2 in the border of valve gap 2, and the angle of buckling is preferably 60, and the laminating covers has sealing washer 22 on valve gap 2's the border, and sealing washer 22 border all around extends to the outside at the border of valve gap, and sealing washer 22 can contradict to carrying out sealedly on valve body 1 when valve gap 2 is closed, compares in the sealing washer of traditional joint cover setting installation, and this kind of sealing washer is difficult to drop, and is more difficult to reveal.

As shown in fig. 6, a vent 11 is arranged on the valve seat 1, a plurality of magnets 111 are arranged around the vent 11, and the magnets 111 are used for attracting the valve cover 2 to close, so as to prevent the valve cover 2 from shaking continuously to impact the valve seat 1 when the air pressure of the air flow is small, thereby generating abnormal sound.

As shown in fig. 7, the valve seat 1 can be installed in the outer shell 6, because the structure of the non-return mechanism 3 is relatively compact, the thickness of the outer shell 6 can also be set to be relatively low, the outer shell 6 is provided with the fixing base 7, the fixing base 7 can prevent the valve seat 1 from being separated from the outer shell 6, the fixing base 7 is provided with the buckle 71 all around, and the fixing base 7 can be clamped and fixed with the outer shell 6 through the buckle 71.

The foregoing has described the general principles, essential features, and advantages of the application. It will be understood by those skilled in the art that the present application is not limited to the embodiments described above, which are merely illustrative of the principles of the application, but that various changes and modifications may be made without departing from the spirit and scope of the application, and such changes and modifications are intended to be within the scope of the application as claimed. The scope of protection claimed by this application is defined by the following claims and their equivalents.

Claims

1. The utility model provides a flue fire prevention check valve which characterized in that: the valve cover is arranged on the valve seat in an openable mode, the non-return mechanism comprises a fixed portion and a movable portion, the fixed portion is arranged on the valve seat on one side of the valve cover, the movable portion is suitable for swinging to the position above the valve cover from the position of the valve seat by taking the fixed portion as a center, the movable portion is suitable for preventing the valve cover from being opened when swinging to the position above the valve cover, the induction mechanism is arranged on the valve seat, the induction mechanism is suitable for fixing the movable portion on the valve seat, and the induction mechanism is suitable for releasing the movable portion when sensing that the ambient temperature is too high.

2. A flue fire-resistant check valve as claimed in claim 1, wherein: the induction mechanism comprises a support and a positioner, wherein a temperature sensing piece is arranged on the support, the temperature sensing piece is fixed on the positioner, the positioner is suitable for preventing the movable part from swinging, the temperature sensing piece is suitable for fusing when sensing the overhigh ambient temperature, and the positioner is suitable for releasing the fixation of the movable part when the temperature sensing piece fuses.

3. A flue fire-resistant check valve as claimed in claim 2, wherein: the plane of the temperature sensing piece is intersected with the plane of the positioner, and one side of the temperature sensing piece is abutted and clamped with the positioner.

4. A flue fire-resistant check valve as claimed in claim 2, wherein: the positioner comprises a clamping part and a positioning part, the clamping part is clamped with the bracket, the clamping part is suitable for being matched with the temperature sensing piece to fix the positioner, the positioning part is suitable for clamping and positioning the movable part, and the front end of the positioning part is obliquely bent towards the swinging direction of the movable part; the support is provided with a limiting groove, and the limiting groove is suitable for being matched with the clamping portion to fix the movable portion.

5. A flue fire-resistant check valve as claimed in claim 1, wherein: be provided with first flexion on the movable part, the movable part swings extremely when the valve gap top, first flexion is suitable for to contradict the valve gap.

6. A fire-resistant check valve for a flue as claimed in claim 5, wherein: the valve cover is provided with a protruding portion, and the protruding portion is suitable for being matched with and abutted against the first bending portion.

7. A flue fire-resistant check valve as claimed in claim 1, wherein: the movable portion with be provided with the second flexion between the fixed part, the second flexion to the valve gap outside is crooked, when the movable portion with response mechanism connects, the second flexion is suitable for and prevents the movable portion contacts the valve gap.

8. A flue fire-resistant check valve as claimed in claim 1, wherein: the valve seat is further provided with a positioning device, the positioning device comprises a positioning seat, and the positioning seat is suitable for clamping and fixing the movable part.

9. A flue fire-resistant check valve as claimed in claim 8, wherein: the top of positioning seat is provided with guide portion, the front end of guide portion is the bending upwards, the movable part is suitable for along guide portion gets into the positioning seat.

10. A flue fire-resistant check valve as claimed in claim 1, wherein: the swing plane of the movable part is parallel to the plane of the valve seat, the fixed part is rotatably connected with the valve seat, the fixed part is perpendicular to the plane of the valve seat, and the fixed part is provided with an elastic resetting piece which is suitable for enabling the movable part to swing above the valve seat; one side of the valve cover is rotatably connected with the valve seat, and the movable part is suitable for swinging from the connection part of the valve cover and the valve seat to enter the position above the valve cover; the valve cover is obliquely arranged on the valve seat, the higher side of the valve cover is close to the fixed part, and the lower side of the valve cover is close to the movable part.