CN209876077U - Fire-retardant valve for pipeline - Google Patents

Abstract

The embodiment of the utility model discloses a pipeline fire-retardant valve, which comprises a valve box, wherein a valve seat is arranged in the valve box, fusible metal rods are oppositely arranged at the upper end and the lower end of the valve seat, the end parts of the fusible metal rods are respectively provided with a separation fire-extinguishing plate, and the fusible metal rods are sleeved with compression springs; the utility model discloses a fire relief valve not only can cut off the propagation of the intensity of a fire in the pipeline, but also can put out a fire layer by layer through the fire prevention fire relief plate, and does not worry about the secondary explosion caused by tempering; the fire is dispersed uniformly, the sealing performance of the connecting part is enhanced, the fire retardant effect is optimized, and the safety of equipment and personnel is guaranteed.

Description

Fire-retardant valve for pipeline

Technical Field

The embodiment of the utility model provides a relate to explosion-proof equipment technical field, concretely relates to pipeline back-fire relief valve.

Background

The fire-retardant valve is a valve which is used for blocking smoke and flame from a fire area and can meet the requirements of fire-resistant stability and fire-resistant integrity within a certain time. When a fire breaks out in a building, the fire rapidly spreads along the duct of the ventilation and air conditioning system, and a great number of cases cause significant losses. In order to minimize the loss caused by fire, effective fire and smoke prevention measures must be taken to control the spread of fire, and the proper arrangement of fire valves in ventilation, air conditioning and smoke prevention systems plays an important role. When dust explosion happens to the dust remover or the storage bin, the generated explosion flame and shock waves are transmitted to other equipment or plants, so that a fire-retardant valve is required to be arranged on a conveying pipeline, the explosion flame is extinguished in time, and the safety of the equipment and personnel is protected by releasing pressure.

However, the existing fire-retardant valve has the following problems: the traditional fire-retardant valve can only cut off the propagation of fire in a pipeline and can not extinguish fire, and once the fire is tempered, the traditional fire-retardant valve has the risk of secondary explosion; the valve core of a common fire relief valve bears huge pressure at the moment of meeting fire, so that the mechanism is easily damaged; and the sealing effect of part current case is not good, has reduced the back-fire relief effect.

Disclosure of Invention

Therefore, the embodiment of the utility model provides a pipeline back-fire relief valve to solve among the prior art because the not good problem of back-fire relief effect that back-fire relief valve design defect leads to.

In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:

the utility model provides a pipeline fire relief valve, which comprises a valve box, wherein a valve seat is arranged in the valve box, a plurality of groups of mutually parallel fusible metal rods are oppositely arranged at the upper end and the lower end of the valve seat, both ends of each fusible metal rod are connected with a separation fire-extinguishing plate, a compression spring is sleeved on each fusible metal rod, both ends of the compression spring are respectively and fixedly connected to the valve seat and the separation fire-extinguishing plate, and the bottom ends of the upper separation fire-extinguishing plate and the lower separation fire-extinguishing plate are sealed and meshed;

the separation fire board includes the back-fire relief shell, a plurality of stainless steel meshwork silk that have evenly arranged in the inside of back-fire relief shell hinder the firetube, the entrance point that the stainless steel meshwork silk hinders the firetube is provided with the pressure equalizing chamber, the exit end that the stainless steel meshwork silk hinders the firetube is provided with the chamber of hindering fires, the pressure equalizing intracavity is provided with a plurality of soft magnetic particles of fire prevention, the back-fire relief intracavity is provided with the fire prevention daub layer that density from inside to outside increases gradually. The pressure equalizing cavity can enable the blocking fire-extinguishing plate to be pressed evenly; the stainless steel wire fire-resistant pipe can extinguish explosion flame by absorbing reflection and release pressure, thereby protecting the safety of equipment and personnel. The length of the stainless steel wire flame-retardant tube can be evaluated by evaluating the destructive power generated by the explosive medium; the fire-retardant cavity can extinguish layer by layer to block fire, so as to prevent tempering.

According to the pipeline fire relief valve, the valve seat is provided with the overflow through hole, the inner end of the overflow through hole is connected with the fusible metal rod, and the outer end of the overflow through hole extends to the outside of the valve seat. When the fusible metal rod is melted into liquid under the melting action of high temperature generated by explosion, the liquid is discharged through the overflow through hole in time, so that the fused solution is prevented from being adhered to the inner cavity of the pipeline fire damper to influence the normal operation of other mechanisms.

Furthermore, the opposite end faces of the two separation fire-extinguishing plates are respectively provided with a U-shaped sealing frame and a T-shaped expansion sealing element clamped in the U-shaped sealing frame, and the T-shaped expansion sealing element is made of thermal expansion materials. When the T-shaped expansion sealing element clamped with the U-shaped sealing frame is heated and expanded, the sealing effect between the upper and lower two separation fire-extinguishing plates can be enhanced, and the explosion fire source can be separated more effectively.

Further, the lateral wall of back-fire relief shell is provided with the guide way, the inside wall of disk seat is provided with inlays the guided way in the guide way. After the fusible metal rod is fused, the blocking fire-extinguishing plate can slide along the guide rail in the vertical direction under the action of the compression spring.

Furthermore, the inner pipe wall of the stainless steel wire mesh fire-resisting pipe is provided with a plurality of concave-convex reflecting surfaces, and fireproof paint is coated on the concave-convex reflecting surfaces. The concave-convex reflecting surface can reflect heat, the fireproof coating can absorb heat, and the fire behavior is relieved layer by layer.

Further, the fusible metal rod is made of zinc alloy. The zinc alloy material is easy to form and is easy to fuse when meeting high temperature, and the fire retardant valve is triggered in time to prevent the spread of fire.

Furthermore, the outer end of the overflow through hole is sleeved with a one-way drain valve. The one-way drain valve prevents the backflow of the solution.

The embodiment of the utility model has the advantages that the fire-retardant valve of the utility model not only can cut off the propagation of fire in the pipeline, but also can extinguish fire layer by layer through the separation fire-extinguishing plate without worrying about the secondary explosion problem caused by tempering; the fire barrier fire extinguishing plate can disperse fire uniformly, so that the valve core of the fire retardant valve is prevented from being pressed intensively, and the service life of the fire retardant valve is prolonged; the connection parts of the upper and lower separation fire-extinguishing plates strengthen the sealing, further optimize the fire-retarding effect and ensure the safety of equipment and personnel.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structure, ratio, size and the like shown in the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention has no substantial technical significance, and any structure modification, ratio relationship change or size adjustment still falls within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy which can be produced by the present invention and the achievable purpose; during explosion, the fusible metal rod is melted by flame and shock wave, the two fire-extinguishing obstructing plates are instantly closed under the action of the compression spring, and the fire-retarding valve is instantly closed, which is equivalent to the speed of millisecond.

Fig. 1 is a schematic side view of the present invention;

fig. 2 is a schematic cross-sectional view of a-a' in fig. 1 according to the present invention;

fig. 3 is a schematic structural view of the separation fire-extinguishing plate of the present invention.

Reference numerals in the figures

1-a valve box; 2-valve seat; 3-a fusible metal rod; 4-a fire-extinguishing barrier; 5-compression spring; 6-overflow through holes; 7-one-way drain valve;

401-firestop housing; 402-stainless steel wire fire-resistant tube; 403-pressure equalizing chamber; 404-a fire-retardant cavity; 405-fireproof soft magnetic particles; 406-a layer of fire-retardant mastic; 407-U-shaped sealing frame; 408-T-shaped expansion seal; 409-a guide groove; 410-a guide rail; 411-concave-convex reflective surface.

Detailed Description

The present invention is described in terms of specific embodiments, and other advantages and benefits of the present invention will become apparent to those skilled in the art from the following disclosure. 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.

In the present specification, the terms "upper", "lower", "left", "right", "middle", and the like are used for the sake of clarity only, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof are also considered to be the scope of the present invention without substantial changes in the technical content.

As shown in fig. 1 to 3, the utility model provides a pipeline back-fire relief valve, including valve box 1, the both ends of valve box 1 are equipped with import and export respectively, and the inside of valve box 1 is provided with disk seat 2, and both ends are just to installing meeting high temperature that a plurality of groups are parallel to each other and will take place fused fusible metal pole 3 about disk seat 2, and fusible metal pole 3 is the zinc alloy material. The zinc alloy material is easy to form and is easy to fuse when meeting high temperature, and the fire retardant valve is triggered in time to prevent the spread of fire. The equal fixed mounting in tip of fusible metal pole 3 has the separation fire board 4 that is used for progressively stopping flame propagation, and the cover is equipped with compression spring 5 on the fusible metal pole 3, and compression spring 5's both ends are fixed connection respectively on disk seat 2 and separation fire board 4, and the mutual sealed interlock in bottom of two upper and lower separation fire boards 4.

According to the pipeline fire relief valve, the valve seat 2 is provided with the overflow through hole 6, the inner end of the overflow through hole 6 is connected with the fusible metal rod 3, the outer end of the overflow through hole 6 extends to the outside of the valve seat 2, and the outer end of the overflow through hole 6 is sleeved with the one-way liquid discharge valve 7. When the fusible metal rod 3 is melted into liquid under the melting action of high temperature generated by explosion, the liquid is discharged through the overflow through hole 6 in time, so that the melted liquid is prevented from being adhered to the inner cavity of the pipeline fire damper to influence the normal operation of other mechanisms. The one-way drain valve 7 further prevents the backflow of the solution.

The separation fire board 4 includes fire relief shell 401, and a plurality of stainless steel meshwork silk fire-resistant tubes 402 that have evenly arranged in fire relief shell 401, the entrance point that stainless steel meshwork silk fire-resistant tubes 402 is provided with the pressure-equalizing chamber 403, and the exit end that stainless steel meshwork silk fire-resistant tubes 402 is provided with fire-resistant chamber 404, is provided with a plurality of soft magnetic particles of fire prevention 405 in the pressure-equalizing chamber 403, is provided with the fire prevention daub layer 406 that density from inside to outside increases gradually in fire-resistant chamber 404. The pressure equalizing cavity 403 can equalize the pressure of the fire obstructing and extinguishing plate 4; the stainless steel wire fire-blocking tube 402 can extinguish the explosion flame by absorbing reflection, and release pressure, thereby protecting the safety of equipment and personnel. The length of the stainless steel wire flame retardant tube 402 can be evaluated by evaluating the destructive power generated by the explosive medium; and the fire-blocking cavity 404 can extinguish the fire layer by layer to block the fire, thereby playing a role in preventing backfire. Wherein, the inner pipe wall of stainless steel silk hinders firetube 402 is equipped with a plurality of unsmooth reflection planes 411, has paintd fire prevention coating on unsmooth reflection plane 411. The concave-convex reflecting surface 411 can reflect heat, and the fireproof coating can absorb heat, so that the fire behavior is relieved layer by layer.

In order to enhance the sealing effect between the upper and the lower fire-extinguishing obstructing plates 4, the explosion fire source is more effectively obstructed. The opposite end surfaces of the two fire obstructing plates 4 are respectively provided with a U-shaped sealing frame 407 and a T-shaped expansion sealing member 408 clamped in the U-shaped sealing frame 407, and the T-shaped expansion sealing member 408 is made of thermal expansion material. When the T-shaped expansion seal 408 engaged with the U-shaped sealing frame 407 expands due to heat, the two are locked more tightly.

The lateral wall of back-fire relief shell 401 is provided with guide way 409, and the inside wall of valve seat 2 is provided with the guided way 410 of inlaying in guide way 409. After the fusible metal rod 3 is fused, the obstructing and fire-extinguishing plate 4 slides along the guide rail 410 in the vertical direction under the action of the compression spring 5.

Preferably, the valve box is made of magnetic steel, stainless steel or aluminum alloy, and one end of the valve box is provided with a mounting seat. Through the bolt and nut structure, the valve box can be conveniently installed on various supporting surfaces through the installation seat, and the stability of the whole structure is enhanced. In addition, the internally mounted of valve box has the dust concentration inductor that is used for detecting the dust concentration in the pipeline back-fire relief valve, and after the concentration that the dust concentration inductor detected the dust exceeded standard, the dust remover that will start carries out the dust clearance in to the passageway.

The utility model discloses a pipeline back-fire relief valve's theory of operation: will the fire relief valve of the utility model is arranged on the dust conveying pipeline. When no explosion occurs, under the supporting action of the fusible metal rod 3, the two fire blocking plates 4 are in an opening and closing state, and the compression spring 5 is in a highly compressed state; when the feed bin generates dust explosion, the fusible metal rod 3 is fused by explosion flame and shock waves, and liquid melted by the fusible metal rod 3 flows out through the overflow through hole 6. The two fire obstructing plates 4 are pressed against each other to close under the pressing action of the compression springs 5. The explosion flame disperses the fire pressure evenly into the stainless steel wire fire-resistant pipe 402 for reflection and absorption through the fireproof soft magnetic particles 405 in the pressure equalizing chamber 403. The last remaining fire dissipates layer-by-layer through the multiple layers 406 of fire retardant mastic in the fire retardant cavity 404. The effects of good partition and fire resistance are achieved.

Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims (7)

1. The utility model provides a pipeline back-fire relief valve, includes valve box (1), the inside of valve box (1) is provided with disk seat (2), its characterized in that: a plurality of groups of mutually parallel fusible metal rods (3) are arranged at the upper end and the lower end of the valve seat (2) in a positive opposition manner, two ends of each fusible metal rod (3) are connected with a separation fire-extinguishing plate (4), a compression spring (5) is sleeved on each fusible metal rod (3), two ends of each compression spring (5) are respectively and fixedly connected to the valve seat (2) and the separation fire-extinguishing plates (4), and the bottom ends of the upper separation fire-extinguishing plate (4) and the lower separation fire-extinguishing plates (4) are sealed and meshed;

the separation fire board (4) are including back-fire relief shell (401), a plurality of stainless steel meshwork silk fire-resistant tubes (402) have evenly been arranged in the inside of back-fire relief shell (401), the entrance point that stainless steel meshwork silk fire-resistant tubes (402) hinders fire tube (402) is provided with equipressure chamber (403), the exit end that stainless steel meshwork silk fire-resistant tube (402) is provided with fire-resistant chamber (404), be provided with a plurality of soft magnetic particles of fire prevention (405) in equipressure chamber (403), be provided with fire prevention daub layer (406) that density from inside to outside increases gradually in fire-resistant chamber (404).

2. A pipe fire relief valve as claimed in claim 1, wherein: an overflow through hole (6) is formed in the valve seat (2), the inner end of the overflow through hole (6) is connected with the fusible metal rod (3), and the outer end of the overflow through hole (6) extends to the outside of the valve seat (2).

3. A pipe fire relief valve as claimed in claim 1, wherein: and the opposite end surfaces of the two fire blocking plates (4) are respectively provided with a U-shaped sealing frame (407) and a T-shaped expansion sealing element (408) clamped in the U-shaped sealing frame (407).

4. A pipe fire relief valve as claimed in claim 1, wherein: the lateral wall of back-fire relief shell (401) is provided with guide way (409), the inside wall of disk seat (2) is provided with inlays guided way (410) in guide way (409).

5. A pipe fire relief valve as claimed in claim 1, wherein: the inner pipe wall of the stainless steel wire fire-blocking pipe (402) is provided with a plurality of concave-convex reflecting surfaces (411), and fireproof paint is coated on the concave-convex reflecting surfaces (411).

6. A pipe fire relief valve as claimed in claim 1, wherein: the fusible metal rod (3) is made of zinc alloy.

7. A pipe fire relief valve as claimed in claim 2, wherein: the outer end of the overflow through hole (6) is sleeved with a one-way liquid discharge valve (7).