Burning-resistant pipe end flame arrester

Abstract

The invention provides a burning-resistant pipe end flame arrester which comprises a shell arranged at the end of a pipeline and a flame arresting mechanism which comprises a sleeve arranged above the shell and a plurality of flame arresting cores filled in the sleeve and used for receiving combustible fluid. The first pressing disc and the second pressing disc are arranged on the two sides of the sleeve respectively and fixedly connected through a pin, the adjusting mechanism comprises a variable-diameter disc assembly arranged between the shell and the second pressing disc, a shaft cylinder assembly extending to penetrate through the sleeve, and an adjusting mechanism arranged between the variable-diameter disc assembly and the shaft cylinder assembly. And the connecting rods are arranged between the variable-diameter disc assembly and the shaft cylinder assembly. The self-adaptive opening degree adjusting work can be achieved according to the intensity of flame combustion, so that the flow speed of combustible gas can be more quickly and reasonably adjusted, the flame can be lifted, and it is ensured that the flame can be away from the flame arresting core.

Description

Technical Field

[0001] The invention relates to the technical field of fire arresting and explosion suppressing, and in particular to a burn-resistant pipe end flame arrester. Background Art

[0002] Flame arrester is a safety device that can prevent the spread of flammable gas and liquid flames and stop flashback from causing explosions. Usually, flame arresters are installed on flammable gas transport pipelines or pipe ends. They can prevent explosion damage caused by accidental fires during normal operation of industrial equipment, and can therefore be widely used in the actual production, storage, transportation and use of flammable gases.

[0003] In the prior art, the flame arresters that are widely used are deflagration and detonation arresters. When the combustible gas continues to flow to the non-protected side, the flame arrester will continue to burn, and the flame will continue to heat the flame arrester unit, causing the temperature of the flame arrester unit to rise. At the same time, the circulation of the combustible gas will also take away the heat of the flame arrester unit. When the heat transfer of the combustion is greater than the temperature drop of the circulation effect, the temperature of the protected side of the flame arrester will continue to rise until it reaches the ignition point and explodes. When the heat transfer of the combustion is less than or equal to the temperature drop of the circulation effect, the temperature of the protected side of the flame arrester will be in a lower range, and the flame arrester will have the effect of preventing fire and suppressing explosion.

[0004] At present, pipe end flame arresters usually cannot burn for a long time. Therefore, when there is a continuous combustible gas source, it is very likely to flash back and cause a flash explosion. Especially when a larger size pipeline flame arrester needs to be installed, due to the large flow area, the large amount of heat generated by the combustion of the combustible gas in a short time is difficult to quickly diffuse through the flame arrester unit. Therefore, the temperature of the protection side of the flame arrester is very likely to rise to the ignition point of the combustible gas in a short time, causing a series of dangerous accidents.

[0005] Therefore, it is desired in the art to provide a burn-resistant pipe end flame arrester to solve the above technical problems. Summary of the invention

[0006] The purpose of the present invention is to propose a burn-resistant pipe end flame arrester, which can realize adaptive opening adjustment through a variable diameter disk assembly according to the intensity of flame combustion, so that the flow rate of the combustible gas can be reasonably adjusted more quickly, and then the flame can be raised to ensure that the flame can be away from the flame arrester core.

[0007] According to the present invention, there is provided a fire-resistant pipe end flame arrester, comprising a shell arranged on the end of a pipe,

[0008] The fire-blocking mechanism comprises a sleeve disposed above the housing, a plurality of fire-blocking cores filled in the sleeve and used to receive a flammable fluid, and a first pressure plate and a second pressure plate respectively disposed on both sides of the sleeve and fixedly connected by pins.

[0009] The adjusting mechanism comprises a variable diameter disc assembly arranged between the housing and the second pressure disc, a shaft cylinder assembly extending through the fire-blocking core, and a plurality of connecting rods arranged between the variable diameter disc assembly and the shaft cylinder assembly.

[0010] In one embodiment, the variable diameter disc assembly includes a first turntable configured in a hollow cover form, a second turntable configured in an annular structure and arranged opposite to the first turntable, and a circular disc arranged inside the first turntable and the second turntable, wherein a plurality of spaced-apart slide grooves are formed on both the first turntable and the second turntable.

[0011] In one embodiment, the disc includes a plurality of disc segments arranged in a circumferential direction and configured in a fan-shaped structure, and protrusions extending radially outward and used to form a sliding connection with the slide groove are formed on both sides of each of the disc segments.

[0012] In one embodiment, the shaft cylinder assembly includes a body configured in the form of a hollow sleeve and disposed at the center of the sleeve, a piston disposed in the body, and a memory alloy configured in a curved shape and fixedly connected to the top end of the piston.

[0013] The memory alloy is configured to straighten and push the piston downward when the temperature rises, so as to cause the disc to shrink inward in the first turntable, and to recover and pull the piston upward when the temperature drops, so as to cause the disc to expand outward in the first turntable.

[0014] In one embodiment, the shaft-cylinder assembly includes a body configured in the form of a hollow sleeve and arranged at the center of the sleeve, a piston sealingly connected to the inner circumferential surface of the body, and a pushing member arranged above the piston and located in a cavity of the body, wherein the pushing member can expand in the cavity when the temperature rises, thereby pushing the piston to move downward, so as to cause the disc to shrink inward in the first turntable.

[0015] In one embodiment, the pushing member is configured as liquid water.

[0016] In one embodiment, at least one through hole for communicating with the cavity is circumferentially arranged on the side wall of the body, and the through hole is located below the piston in an initial state.

[0017] In one embodiment, the pusher is configured as an intumescent coating coated on an inner wall of the cavity.

[0018] In one embodiment, the intumescent coating comprises any one of.

[0019] In one embodiment, the shaft-cylinder assembly further includes a push rod fixedly connected to the bottom end of the piston, and a circular ring disposed at the free end of the push rod.

[0020] In one embodiment, a first engaging portion extending radially outward is provided on the push rod.

[0021] The shaft-cylinder assembly further includes a second engaging portion in an annular form and disposed in the body and used for forming a threaded connection with the first engaging portion.

[0022] In one embodiment, the connecting rod comprises a first connecting rod portion with a larger diameter hinged on the second rotating disk, and a second connecting rod portion with a smaller diameter hinged on the ring.

[0023] In one embodiment, the fire-blocking mechanism further comprises a plurality of partitions circumferentially arranged in the sleeve and used to separate adjacent fire-blocking cores, wherein the partitions comprise any one of square, elliptical and triangular shapes.

[0024] Compared with the prior art, the advantages of the present invention are:

[0025] First, the present invention installs a variable diameter disc assembly at the top or bottom of the fire-retardant core. Thus, the variable diameter disc assembly can realize the adjustment of the opening adaptively according to the intensity of the flame combustion, so that the flow rate of the combustible gas can be reasonably adjusted more quickly, and then the flame can be raised to ensure that the flame can be away from the fire-retardant core.

[0026] Since the flow rate of the combustible gas can be accelerated by adjusting the opening of the variable diameter disk assembly, a large amount of heat in the flame arrester core can be quickly brought out in this state, thereby reducing the internal temperature of the flame arrester core and further improving the heat dissipation capacity of the burn-resistant flame arrester.

[0027] In addition, under the above-mentioned effect, since the temperature in the fire-retardant core can be effectively controlled, it is possible to effectively prevent the fire-retardant core from causing safety hazards due to excessive temperature or pressure.

[0028] In addition, the above method can effectively ensure that the heat transfer of the combustible gas combustion is always less than the heat dissipation of the flame retardant core, thereby ensuring that the inlet side temperature of the flame retardant core can always be maintained in a lower temperature range, thereby improving the burning resistance and flame retardancy of the burn-resistant flame arrester.

[0029] Secondly, the variable diameter disc assembly of the present invention has good operability and rapid adjustment capability.

[0030] Specifically, the disc is installed in the internal cavity formed by the first rotating disc and the second rotating disc and the disc can form a sliding connection with the first rotating disc and the second rotating disc respectively, so that the disc can perform an inward contraction or outward expansion movement in the internal cavity. Preferably, the disc includes a plurality of disc segments arranged in a circumferential direction and configured in a fan-shaped structure.

[0031] Therefore, when the disc is in the inwardly contracted state, adjacent disc segments are closely fitted to each other, so that the variable diameter disc assembly has a minimum flow area in this state.

[0032] When the disc is in an outwardly expanded state, adjacent disc segments are staggered with respect to each other, and the disc segments are radially in contact with the inner wall of the second rotating disc, so that the variable diameter disc assembly has a maximum flow area in this state.

[0033] Thirdly, the shaft cylinder assembly and the variable diameter disc assembly of the present invention have a good transmission relationship, thereby ensuring that the burn-resistant flame arrester can realize adaptive opening adjustment according to the intensity of flame combustion, and thus can reasonably adjust the flow rate of the combustible gas more quickly.

[0034] Fourthly, the present invention can be widely used in facilities such as the end of a flammable gas discharge pipeline, a device or valve outlet, and a breathing valve outlet, and is particularly suitable for scenes where there may be continuous discharge of flammable gas. As companies pay more and more attention to safety, their demand for high-quality burn-resistant flame arresters is increasing, and the present invention has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The present invention will be described in detail below in conjunction with the accompanying drawings, in which:

[0036] Figure 1 The structure of the burn-resistant pipe end flame arrester according to the present invention is schematically shown;

[0037] Figure 2 An exploded view of a variable diameter disc assembly in a burn-resistant pipe end flame arrester according to the present invention;

[0038] Figure 3 A schematic diagram of a disc segment in a burn-resistant pipe end flame arrester according to the present invention;

[0039] Figure 4 A schematic diagram of a first embodiment of a shaft-cylinder assembly in a burn-resistant pipe end flame arrester according to the present invention;

[0040] Figure 5 A schematic diagram of a second embodiment of a shaft-cylinder assembly in a burn-resistant pipe end flame arrester according to the present invention;

[0041] Figure 6Schematic diagram of a third embodiment of a shaft cylinder assembly in a burn-resistant pipe end flame arrester according to the present invention

[0042] Figure 7 It is a partial schematic diagram of the burn-resistant pipe end flame arrester according to the present invention.

[0043] In the drawings, the same reference numerals are used for the same components. The drawings are not drawn to scale.

[0044] The meanings of the reference numerals in the accompanying drawings are as follows:

[0045] 1 housing, 11 first housing part, 12 second housing part,

[0046] 21 sleeve, 22 flame arrester core, 23 first pressure plate, 24 second pressure plate, 25 pin,

[0047] 3 variable diameter disc assembly, 301 slide groove, 31, first rotating disc, 32 second rotating disc, 321 connecting block, 33 disc, 331 disc segment, 332 protrusion,

[0048] 4-axis cylinder assembly,

[0049] 411 body, 412 piston, 413 memory alloy

[0050] 421 body, 422 cavity, 423 piston, 424 pusher, 425 through hole,

[0051] 431 body, 432 cavity, 433 piston, 434 pusher,

[0052] 5 push rod, 51 first joint portion, 52 ring,

[0053] 6 second joint part,

[0054] 7 connecting rod, 701 first connecting rod part, 702 second connecting rod part,

[0055] 8 partitions. DETAILED DESCRIPTION

[0056] In order to make the technical solutions and advantages of the present invention more clearly understood, the exemplary embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than an exhaustive list of all the embodiments. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0057] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0058] In the present invention, unless otherwise clearly stipulated and limited, terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two elements.

[0059] For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0060] The present invention will be further described below in conjunction with the accompanying drawings.

[0061] Figure 1 The structure of the burn-resistant pipe end flame arrester 100 according to the present invention is schematically shown.

[0062] Figure 2 FIG. 1 is an exploded view of the variable diameter disk assembly 3 in the burn-resistant pipe end flame arrester 100 according to the present invention.

[0063] Figure 3 FIG. 3 is a schematic diagram of a disk segment 331 in the burn-resistant pipe end flame arrester 100 according to the present invention.

[0064] Figure 4 Schematic diagram of a first embodiment of the shaft-cylinder assembly 4 in the burn-resistant pipe end flame arrester 100 according to the present invention.

[0065] Figure 5 Schematic diagram of a second embodiment of the shaft-cylinder assembly 4 in the burn-resistant pipe end flame arrester 100 according to the present invention.

[0066] Figure 6 It is a schematic diagram of a third embodiment of the shaft-cylinder assembly 4 in the burn-resistant pipe end flame arrester 100 according to the present invention;

[0067] Figure 7 It is a partial schematic diagram of the burn-resistant pipe end flame arrester according to the present invention.

[0068] like Figure 1As shown, the fire-resistant pipe end flame arrester 100 according to the present invention includes a shell 1 arranged at the end of the pipe. Preferably, the shell 1 includes a first shell part 11 configured as a straight cylinder, and a second shell part 12 arranged above the first shell part 11. The diameter of the second shell part 12 gradually increases in the direction away from the first shell part 11. In this way, the fluid in the pipeline can smoothly flow to the flame arresting mechanism (described below), thereby achieving the purpose of preventing the spread of the flame of the combustible gas and liquid and preventing the flashback from inducing explosion.

[0069] In a preferred embodiment, the housing 1 can form a fixed and sealed connection with the end of the pipeline through a flange.

[0070] According to the present invention, Figure 1 and 7 As shown, the fire-resistant pipe end flame arrester 100 also includes a flame arresting mechanism. Preferably, the flame arresting mechanism includes a sleeve 21, and a first pressure plate 23 and a second pressure plate 24 respectively arranged on both sides of the sleeve 21. Preferably, the sleeve 21, the first pressure plate 23, the second pressure plate 24 and the housing 1 form a stable working environment, so as to achieve the purpose of preventing the spread of combustible gas and liquid flames.

[0071] In a preferred embodiment, the first pressure plate 23 and the second pressure plate 24 are both configured as an annular structure, so as to allow the flame to be discharged outward from the first pressure plate 23, thereby achieving the purpose of preventing the propagation of the flammable gas and liquid flame.

[0072] In one embodiment, if Figure 1 and 7 As shown, the fire-blocking mechanism further includes a fire-blocking core 22. Preferably, the fire-blocking core 22 is provided with at least two layers, and both are filled in the sleeve 21.

[0073] In a specific embodiment, the first pressure plate 23 and the second pressure plate 24 are fixedly mounted on the sleeve 21 by pins 25, and the pins 25 apply a pre-tightening force to the first pressure plate 23 and the second pressure plate 24, so that the fire-blocking core 22 can be firmly mounted in the sleeve 21 to improve the heat dissipation capacity of the flame.

[0074] In a specific embodiment, the fire-blocking core 22 is, for example, a corrugated plate type fire-blocking grid.

[0075] In one embodiment, Figure 1As shown, the fire arresting mechanism further includes a plurality of partitions 8. Preferably, the plurality of partitions 8 are all arranged in the sleeve 21 along the circumferential direction, and can separate adjacent fire arresting cores 22 (referring to two adjacent fire arresting cores 22 in the flame flow direction). In this way, an air layer can be provided between adjacent fire arresting cores 22, thereby improving the heat dissipation capacity of the fire-resistant pipe end flame arrester 100 to the flame.

[0076] In a specific embodiment, the partition 8 includes any one of a square, an oval and a triangle.

[0077] Preferably, the partitions 8 are usually provided with at least two layers, and the partitions 8 on both sides in the axial direction need to be placed vertically, and the contact mode at this time is point contact.

[0078] According to the present invention, the burn-resistant pipe end flame arrester 100 further includes an adjustment mechanism.

[0079] Preferably, if Figure 1 As shown, the adjustment mechanism includes a shaft cylinder assembly 4. The shaft cylinder assembly 4 can extend through the center of the fire-blocking core 22, so as to apply a pre-tightening force to the fire-blocking core 22 to improve the overall stability of the fire-blocking core 22.

[0080] In one embodiment, Figure 1 As shown, the adjustment mechanism also includes a variable diameter disc assembly 3. Preferably, the variable diameter disc assembly 3 is arranged between the second pressure plate 24 and the housing 1, and is hinged to the shaft cylinder assembly 4 through a connecting rod 7 (described below). Thus, the opening of the variable diameter disc assembly 3 can be adjusted through the shaft cylinder assembly 4, and its content is described below.

[0081] In one embodiment, Figure 1 As shown, the variable diameter disk assembly 3 also includes a connecting rod 7. The connecting rod 7 includes a first connecting rod portion 701 and a second connecting rod portion 702. Preferably, the first connecting rod portion 701 has a larger diameter and is hinged on the second rotating disk 32, while the second connecting rod portion 702 has a smaller diameter and is hinged on the ring 52 (described below).

[0082] In a specific embodiment, a connecting block 321 is provided on the second rotating disk 32 , and the first connecting rod portion 701 is hinged to the second rotating disk 32 through the connecting block 321 .

[0083] In another embodiment, the variable diameter plate assembly 3 is arranged above the first pressure plate 23, and is hinged to the shaft cylinder assembly 4 through the connecting rod 7. At the same time, the opening of the variable diameter plate assembly 3 can also be adaptively adjusted through the shaft cylinder assembly 4.

[0084] Next, a first embodiment of the present invention will be described.

[0085] According to the present invention, the diameter-changing disc assembly 3 includes a first rotating disc 31 and a second rotating disc 32 arranged opposite to the first rotating disc 31 .

[0086] like Figure 2 As shown, the first rotating disk 31 is configured as a hollow cover, and the second rotating disk 32 is configured as a hollow disk. Preferably, the first rotating disk 31 is slidably connected to the second rotating disk 32 and an internal cavity is formed therebetween, thereby ensuring that a stable operating space can be provided for the disc 33 (described below).

[0087] In a preferred embodiment, the first rotating disk 31 is fixedly connected to the second pressure disk 24 .

[0088] In one embodiment, the variable diameter disc assembly 3 further includes a circular disc 33 .

[0089] Preferably, if Figure 2 As shown, the disc 33 is installed in the internal cavity formed by the first turntable 31 and the second turntable 32, and the disc 33 can form a sliding connection with the first turntable 31 and the second turntable 32 respectively, so that the disc 33 can perform inward contraction or outward expansion movement in the internal cavity, the content of which is introduced below.

[0090] In one embodiment, the first rotating disk 31, the circular disk 33 and the second rotating disk 32 are closely fitted to each other.

[0091] In a specific embodiment, Figure 2 As shown, a plurality of slots 301 arranged at intervals are formed on both the first rotating disk 31 and the second rotating disk 32. Preferably, the plurality of slots 301 are distributed circumferentially divergently on the first rotating disk 31 and the second rotating disk 32. Thus, the disc 33 can perform inward contraction or outward expansion movement in the internal cavity.

[0092] In one embodiment, at least ten slide grooves 301 are disposed on the first rotating disk 31 , and at least ten slide grooves 301 are disposed on the second rotating disk 32 .

[0093] In a preferred embodiment, when the disk 33 contracts inwardly in the inner cavity, a flow channel is still provided at the center thereof for the fluid in the pipeline to flow.

[0094] In one embodiment, Figure 2 and 3 As shown, the disk 33 includes a plurality of disk segments 331 arranged along the circumferential direction. Preferably, the plurality of disk segments 331 are all configured into a fan-shaped structure and are all distributed divergently along the circumferential direction.

[0095] Preferably, when the disc 33 is in the inwardly contracted state, the adjacent disc segments 331 are closely fitted to each other. Figure 2 Minimum flow areas shown.

[0096] Preferably, when the disc 33 is in an outwardly expanded state, adjacent disc segments 331 are staggered with respect to each other, and the disc segments 331 are radially in contact with the inner wall of the second rotating disc 32. Therefore, the variable diameter disc assembly 3 in this state has the largest flow area.

[0097] In a specific embodiment, Figure 3 As shown, protrusions 332 extending radially outward are formed on both sides of each disc segment 331. Preferably, the disc segment 331 forms a stable engagement relationship with the slide grooves 301 on the first rotating disk 31 and the second rotating disk 32 through the protrusions 332 on both sides.

[0098] Therefore, under the action of the shaft cylinder assembly 4, the disc segment 331 can adaptively perform inward contraction or outward expansion in the internal cavity formed by the first turntable 31 and the second turntable 32, thereby changing the flow area, increasing the flow rate of the combustible gas to lift the flame, and further ensuring that the heat transfer of the combustion of the combustible gas is less than the heat dissipation of the flame arrester mechanism, and further ensuring that the side of the flame arrester mechanism close to the shell 1 can be in a lower temperature range, so as to improve the burn resistance and fire resistance of the burn-resistant pipe end flame arrester 100.

[0099] In one embodiment, Figure 4 As shown, the shaft cylinder assembly 4 includes a body 411, a piston 412 and a memory alloy 413. Preferably, the body 411 is constructed in the form of a hollow sleeve. The piston 412 and the memory alloy 413 are both arranged in the body 411, and the memory alloy 413 is fixedly connected to the top of the piston 412, so that the axial position of the piston 412 in the body 411 can be adjusted, thereby adjusting the opening of the variable diameter disc assembly 3, which is described below.

[0100] In one embodiment, the memory alloy 412 is configured in a curved shape.

[0101] In one embodiment, the memory alloy 412 is made of a nickel-titanium alloy material, for example.

[0102] In one embodiment, Figure 4 As shown, the shaft cylinder assembly 4 further includes a push rod 5. Preferably, the push rod 5 is disposed in the body 411 and fixedly connected to the bottom end of the piston 412.

[0103] In a specific embodiment, a first engaging portion 51 extending radially outward is provided on the push rod 5, and the shaft cylinder assembly 4 further includes a second engaging portion 6 provided in the body 411. Preferably, the second engaging portion 6 is configured in an annular form and is threadedly connected with the first engaging portion 51.

[0104] It is easy to understand that when the push rod 5 performs axial movement, the push rod 5 will perform rotational movement under the joint action of the first engaging portion 51 and the second engaging portion 6, so as to adjust the opening of the variable diameter disk assembly 3, which is described below.

[0105] In one embodiment, Figure 4 As shown, a ring 552 is further provided at the free end of the push rod 5. Preferably, the second connecting rod portion 702 of the connecting rod 7 is hinged on the ring 52.

[0106] It is easy to understand that when the piston 412 moves downward, the push rod 5 will move downward and rotate at the same time, thereby driving the connecting rod 7 to rotate. As a result, the disc segment 331 in the variable diameter disc assembly 3 will adaptively perform an inward contraction adjustment in the internal cavity formed by the first turntable 31 and the second turntable 32, thereby reducing the flow area and increasing the flow rate of the combustible gas to lift the flame, thereby ensuring that the heat transfer of the combustion of the combustible gas is less than the heat dissipation of the flame arrester, and further ensuring that the side of the flame arrester close to the shell 1 can be in a lower temperature range, so as to improve the burn resistance and fire assembly of the burn-resistant pipe end flame arrester 100.

[0107] It is easy to understand that when the piston 412 moves upward, the push rod 5 will move upward and rotate at the same time, thereby driving the connecting rod 7 to rotate. As a result, the disc segment 331 in the variable diameter disc assembly 3 will adaptively expand outward in the internal cavity formed by the first rotating disc 31 and the second rotating disc 32, thereby expanding the flow area for adaptive adjustment, thereby ensuring that the heat transfer amount of the combustion of the combustible gas is less than the heat dissipation of the flame arrester mechanism, and further ensuring that the side of the flame arrester mechanism close to the shell 1 can be in a lower temperature range, so as to improve the burning resistance and fire assembly properties of the burn-resistant pipe end flame arrester 100.

[0108] According to one embodiment of the present invention, the memory alloy 413 is configured to straighten when the temperature rises, thereby pushing the piston 412 to move downward, and then driving the push rod 5, the connecting rod 7, the second turntable 32 and the disc 33 to rotate in sequence, thereby prompting the disc segment 331 to adaptively perform an inward contraction adjustment in the internal cavity formed by the first turntable 31 and the second turntable 32.

[0109] According to one embodiment of the present invention, the memory alloy 413 is configured to be able to reset (i.e., return to a curved shape) when the temperature decreases, thereby pulling the piston 412 to move upward, and then driving the push rod 5, the connecting rod 7, the second turntable 32 and the disc 33 to rotate in sequence, thereby prompting the disc segment 331 to adaptively expand outward in the closed cavity formed by the first turntable 31 and the second turntable 32.

[0110] In one embodiment, external threads are formed at both ends of the main body 411, so that they can be connected to nuts respectively to limit the axial position of the fire-blocking core 22, thereby ensuring that the fire-blocking core 22 can have a stable working environment, so as to improve the heat dissipation capacity of the fire-blocking core 22, and further improve the burn resistance and fire resistance of the burn-resistant flame arrester 100.

[0111] Next, a second embodiment of the present invention will be described.

[0112] According to the present invention, the diameter-changing disc assembly 3 includes a first rotating disc 31 and a second rotating disc 32 arranged opposite to the first rotating disc 31 .

[0113] Preferably, if Figure 2 As shown, the first turntable 31 is constructed in a hollow cover form, and the second turntable 32 is constructed in a hollow disc form. Preferably, the first turntable 31 is slidably connected to the second turntable 32, and an internal cavity is formed therebetween, thereby ensuring that a stable operating space can be provided for the disc 33 (described below).

[0114] In a preferred embodiment, the first rotating disk 31 is fixedly connected to the second pressure disk 24 .

[0115] In one embodiment, Figure 2 As shown, the variable diameter disc assembly 3 further includes a disc 33. Preferably, the disc 33 is installed in the internal cavity formed by the first rotating disc 31 and the second rotating disc 32, and the disc 33 can form a sliding connection with the first rotating disc 31 and the second rotating disc 32 respectively, so that the disc 33 can be retracted inwardly in the internal cavity, which is described below.

[0116] In one embodiment, the first rotating disk 31, the circular disk 33 and the second rotating disk 32 are closely fitted to each other.

[0117] In a specific embodiment, Figure 2 As shown, a plurality of slots 301 arranged at intervals are formed on both the first rotating disk 31 and the second rotating disk 32. Preferably, the plurality of slots 301 are distributed circumferentially divergently on the first rotating disk 31 and the second rotating disk 32. Thus, the disc 33 can be retracted inwardly in the internal cavity.

[0118] In one embodiment, at least ten slide grooves 301 are disposed on the first rotating disk 31 , and at least ten slide grooves 301 are disposed on the second rotating disk 32 .

[0119] In a preferred embodiment, when the disk 33 contracts inwardly in the inner cavity, a flow channel is still provided at the center thereof for the fluid in the pipeline to flow.

[0120] In one embodiment, Figure 2 and 3 As shown, the disk 33 includes a plurality of disk segments 331 arranged along the circumferential direction. Preferably, the plurality of disk segments 331 are all configured into a fan-shaped structure and are all distributed divergently along the circumferential direction.

[0121] Preferably, when the disc 33 is in the inwardly contracted state, the adjacent disc segments 331 are closely fitted to each other. Figure 2 Minimum flow areas shown.

[0122] In a specific embodiment, Figure 3 As shown, protrusions 332 extending radially outward are formed on both sides of each disc segment 331. Preferably, the disc segment 331 forms a stable engagement relationship with the slide grooves 301 on the first rotating disk 31 and the second rotating disk 32 through the protrusions 332 on both sides.

[0123] Therefore, under the action of the shaft cylinder assembly 4, the disc segment 331 can adaptively perform an inward contraction adjustment in the internal cavity formed by the first turntable 31 and the second turntable 32, thereby reducing the flow area, increasing the flow rate of the combustible gas to lift the flame, and further ensuring that the heat transfer of the combustion of the combustible gas is less than the heat dissipation of the flame arrester mechanism, and further ensuring that the side of the flame arrester mechanism close to the shell 1 can be in a lower temperature range, so as to improve the burn resistance and fire resistance of the burn-resistant pipe end flame arrester 100.

[0124] In one embodiment, Figure 5 As shown, the shaft cylinder assembly 4 includes a body 421 and a piston 423. Preferably, the body 421 is constructed in the form of a hollow sleeve. The piston 423 is arranged in the body 421, and the piston 423 can be connected to the inner peripheral surface of the body 421 in a sealing manner.

[0125] In one embodiment, Figure 5 As shown, the shaft cylinder assembly 4 also includes a pusher 424 disposed in the cavity 422 of the body 421. Preferably, the cavity 422 is disposed above the piston 423, whereby the pusher 424 can cause the piston 421 to move downward in subsequent work, thereby adjusting the opening of the variable diameter disc assembly 3, the content of which is described below.

[0126] Preferably, the pusher 424 is constructed of liquid water. It is easy to understand that when the temperature rises, the liquid water will evaporate due to the heat to generate water vapor, thereby causing the volume in the air 422 to expand, thereby pushing the piston to move downward.

[0127] In one embodiment, Figure 5 As shown, the shaft cylinder assembly 4 further includes a push rod 5. Preferably, the push rod 5 is disposed in the body 421 and fixedly connected to the bottom end of the piston 423.

[0128] In a specific embodiment, a first engaging portion 51 extending radially outward is provided on the push rod 5, and the shaft cylinder assembly 4 further includes a second engaging portion 6 provided in the body 421. Preferably, the second engaging portion 6 is configured in an annular form and is threadedly connected with the first engaging portion 51.

[0129] It is easy to understand that when the push rod 5 performs axial movement, the push rod 5 will perform rotational movement under the joint action of the first engaging portion 51 and the second engaging portion 6, so as to adjust the opening of the variable diameter disk assembly 3, which is described below.

[0130] In one embodiment, Figure 5 As shown, a ring 52 is further provided at the free end of the push rod 5. Preferably, the second connecting rod portion 702 of the connecting rod 7 is hinged on the ring 52.

[0131] It is easy to understand that when the piston 423 moves downward, the push rod 5 will move downward and rotate at the same time, thereby driving the connecting rod 7 to rotate. As a result, the disc segment 331 in the variable diameter disc assembly 3 will adaptively perform an inward contraction adjustment in the closed cavity formed by the first turntable 31 and the second turntable 32, thereby reducing the flow area and increasing the flow rate of the combustible gas to lift the flame, thereby ensuring that the heat transfer of the combustion of the combustible gas is less than the heat dissipation of the flame arrester, and further ensuring that the side of the flame arrester close to the shell 1 can be in a lower temperature range, so as to improve the burn resistance and fire assembly of the burn-resistant pipe end flame arrester 100.

[0132] According to one embodiment of the present invention, the push member 424 is configured to generate water vapor when the temperature rises, thereby causing the volume in the cavity 422 of the body 421 to expand, thereby pushing the piston to move downward, further driving the push rod 5, the connecting rod 7, the second turntable 32 and the disc 33 to rotate, thereby causing the disc segment 331 to adaptively perform an inward contraction adjustment in the internal cavity formed by the first turntable 31 and the second turntable 32.

[0133] In one embodiment, Figure 5 As shown, at least one through hole 425 is circumferentially provided on the side wall of the body 421. Preferably, the through hole 425 is located below the piston 423 in an initial state.

[0134] It is easy to understand that when the volume in the cavity 422 expands to the limit, the piston 423 will pass downward over the through hole 425, thereby causing the through hole 425 to communicate with the cavity 422, so as to properly release the overpressure water vapor in the cavity 422, thereby preventing the cavity 422 from expanding and cracking due to heat, and further effectively protecting the fire-resistant pipe end flame arrester 100.

[0135] In one embodiment, external threads are formed at both ends of the main body 421, so that they can be connected to nuts respectively to limit the axial position of the fire-blocking core 22, thereby ensuring that the fire-blocking core 22 can have a stable working environment, so as to improve the heat dissipation capacity of the fire-blocking core 22, and further improve the burn resistance and fire resistance of the burn-resistant flame arrester 100.

[0136] Next, a third embodiment will be described.

[0137] According to the present invention, the diameter-changing disc assembly 3 includes a first rotating disc 31 and a second rotating disc 32 arranged opposite to the first rotating disc 31 .

[0138] Preferably, if Figure 2 As shown, the first rotating disk 31 is configured as a hollow cover-like form, and the second rotating disk 32 is configured as a hollow disk-like form. Preferably, the first rotating disk 31 is slidably connected to the second rotating disk 32, and an internal cavity is formed between the two, thereby ensuring that a stable operating space can be provided for the disc 33 (described below).

[0139] In a preferred embodiment, the first rotating disk 31 is fixedly connected to the second pressure disk 24 .

[0140] In one embodiment, Figure 2 As shown, the variable diameter disc assembly 3 further includes a disc 33. Preferably, the disc 33 is installed in the internal cavity formed by the first rotating disc 31 and the second rotating disc 32, and the disc 33 can form a sliding connection with the first rotating disc 31 and the second rotating disc 32 respectively, so that the disc 33 can be retracted inwardly in the internal cavity, which is described below.

[0141] In one embodiment, the first rotating disk 31, the circular disk 33 and the second rotating disk 32 are closely fitted to each other.

[0142] In a specific embodiment, Figure 2 As shown, a plurality of slots 301 arranged at intervals are formed on both the first rotating disk 31 and the second rotating disk 32. Preferably, the plurality of slots 301 are distributed circumferentially divergently on the first rotating disk 31 and the second rotating disk 32. Thus, the disc 33 can be retracted inwardly in the internal cavity.

[0143] In one embodiment, at least ten slide grooves 301 are disposed on the first rotating disk 31 , and at least ten slide grooves 301 are disposed on the second rotating disk 32 .

[0144] In a preferred embodiment, when the disk 33 contracts inwardly in the inner cavity, a flow channel is still provided at the center thereof for the fluid in the pipeline to flow.

[0145] In one embodiment, Figure 2 and 3 As shown, the disk 33 includes a plurality of disk segments 331 arranged along the circumferential direction. Preferably, the plurality of disk segments 331 are all configured into a fan-shaped structure and are all distributed divergently along the circumferential direction.

[0146] Preferably, when the disc 33 is in the inwardly contracted state, the adjacent disc segments 331 are closely fitted to each other. Figure 2 Minimum flow areas shown.

[0147] In a specific embodiment, protrusions 332 extending radially outward are formed on both sides of each disc segment 331. Preferably, the disc segment 331 forms a stable engagement relationship with the slide grooves 301 on the first rotating disk 31 and the second rotating disk 32 through the protrusions 332 on both sides.

[0148] Therefore, under the action of the shaft cylinder assembly 4, the disc segment 331 can adaptively perform an inward contraction adjustment in the internal cavity formed by the first turntable 31 and the second turntable 32, thereby changing the flow area, increasing the flow rate of the combustible gas to lift the flame, and further ensuring that the heat transfer of the combustible gas combustion is less than the heat dissipation of the flame arrester mechanism, and further ensuring that the side of the flame arrester mechanism close to the shell 1 can be in a lower temperature range, so as to improve the burn resistance and fire resistance of the burn-resistant pipe end flame arrester 100.

[0149] In one embodiment, Figure 6 As shown, the shaft cylinder assembly 4 includes a body 431 and a piston 433. Preferably, the body 431 is constructed in the form of a hollow sleeve. The piston 433 is arranged in the body 431, and the piston 433 can be sealedly connected to the inner peripheral surface of the body 431.

[0150] In one embodiment, Figure 6 As shown, the shaft cylinder assembly 4 also includes a pusher 434 disposed in the cavity 432 of the body 431. Preferably, the cavity 432 is disposed above the piston 433, whereby the pusher 434 can cause the piston 431 to move downward in subsequent work, thereby adjusting the opening of the variable diameter disc assembly 3, the content of which is described below.

[0151] Preferably, the pusher 434 is configured as an expansion coating coated on the inner wall of the cavity 432. It is easy to understand that when the temperature rises, the expansion coating will be heated and expand in the cavity 432, thereby pushing the piston to move downward.

[0152] In a preferred embodiment, the expansion coefficient of the intumescent coating is in the range of 10 to 20, and includes materials such as expanded graphite and polyurethane rigid foam that can expand to several times or even dozens of times their original volume when heated.

[0153] In one embodiment, Figure 6 As shown, the shaft cylinder assembly 4 further includes a push rod 5. Preferably, the push rod 5 is disposed in the body 431 and fixedly connected to the bottom end of the piston 433.

[0154] In a specific embodiment, Figure 6 As shown, a first engaging portion 51 extending radially outward is provided on the push rod 5, and the shaft cylinder assembly 4 further includes a second engaging portion 6 provided in the body 431. Preferably, the second engaging portion 6 is configured in an annular form and is threadedly connected with the first engaging portion 51.

[0155] It is easy to understand that when the push rod 5 performs axial movement, the push rod 5 will perform rotational movement under the joint action of the first engaging portion 51 and the second engaging portion 6, so as to adjust the opening of the variable diameter disk assembly 3, which is described below.

[0156] In one embodiment, Figure 6 As shown, a ring 52 is further provided at the free end of the push rod 5. Preferably, the second connecting rod portion 702 of the connecting rod 7 is hinged on the ring 52.

[0157] It is easy to understand that when the piston 433 moves downward, the push rod 5 will move downward and rotate at the same time, thereby driving the connecting rod 7 to rotate. As a result, the disc segment 331 in the variable diameter disc assembly 3 will adaptively perform an inward contraction adjustment in the closed cavity formed by the first turntable 31 and the second turntable 32, thereby reducing the flow area and increasing the flow rate of the combustible gas to lift the flame, thereby ensuring that the heat transfer of the combustion of the combustible gas is less than the heat dissipation of the flame arrester, and further ensuring that the side of the flame arrester close to the shell 1 can be in a lower temperature range, so as to improve the burn resistance and fire assembly of the burn-resistant pipe end flame arrester 100.

[0158] According to one embodiment of the present invention, the push member 434 is configured to expand in the cavity 432 when the temperature rises, thereby causing the volume of the cavity 432 of the body 431 to expand, thereby pushing the piston to move downward, further driving the push rod 5, the connecting rod 7, the second turntable 32 and the disc 33 to rotate, thereby causing the disc segment 331 to adaptively perform an inward contraction adjustment in the closed cavity formed by the first turntable 31 and the second turntable 32.

[0159] In one embodiment, external threads are formed at both ends of the main body 431, so that they can be connected to nuts respectively to limit the axial position of the fire-blocking core 22, thereby ensuring that the fire-blocking core 22 can have a stable working environment, so as to improve the heat dissipation capacity of the fire-blocking core 22, and further improve the burn resistance and fire resistance of the burn-resistant flame arrester 100.

[0160] Compared with the prior art, the present invention has the advantages of:

[0161] First, the present invention installs a variable diameter disc assembly 3 at the top or bottom of the fire-blocking core 22. Therefore, the variable diameter disc assembly 3 can realize the adjustment of the adaptive opening according to the intensity of the flame combustion, so that the flow rate of the combustible gas can be reasonably adjusted more quickly, and then the flame can be raised to ensure that the flame can be away from the fire-blocking core 22.

[0162] Since the flow rate of the combustible gas can be accelerated by adjusting the opening of the variable diameter disk assembly 3, a large amount of heat in the flame arrester core 22 can be quickly removed in this state, thereby reducing the internal temperature of the flame arrester core 22 and further improving the heat dissipation capacity of the burn-resistant flame arrester 100.

[0163] In addition, under the above-mentioned effect, since the temperature in the fire-blocking core 22 can be effectively controlled, it is possible to effectively prevent the fire-blocking core 22 from causing safety hazards due to excessive temperature or pressure.

[0164] In addition, the above method can effectively ensure that the heat transfer of the combustible gas combustion is always less than the heat dissipation of the flame retardant core 22, thereby ensuring that the inlet side temperature of the flame retardant core 22 can always be maintained within a relatively low temperature range, thereby improving the burn resistance and flame retardancy of the burn-resistant flame arrester 100.

[0165] Secondly, the variable diameter disc assembly 3 of the present invention has good operability and the ability of rapid adjustment.

[0166] Specifically, the disk 33 is installed in the internal cavity formed by the first rotating disk 31 and the second rotating disk 32, and the disk 33 can form a sliding connection with the first rotating disk 31 and the second rotating disk 32 respectively, so that the disk 33 can perform an inward contraction or outward expansion movement in the internal cavity. Preferably, the disk 33 includes a plurality of disk segments 331 arranged in a circumferential direction and configured in a fan-shaped structure.

[0167] Therefore, when the disc 33 is in the state of being retracted inward, the adjacent disc segments 331 are closely fitted to each other. Thus, in this state, the variable diameter disc assembly 3 has the following characteristics: Figure 2 Minimum flow areas shown.

[0168] When the disc 33 is in an outwardly expanded state, adjacent disc segments 331 are staggered with respect to each other, and the disc segments 331 are radially in contact with the inner wall of the second rotating disc 32 , so that the variable diameter disc assembly 3 has a maximum flow area in this state.

[0169] Thirdly, the shaft cylinder assembly 4 and the variable diameter disc assembly 3 of the present invention have a good transmission relationship, thereby ensuring that the burn-resistant flame arrester 100 can realize adaptive opening adjustment according to the intensity of flame combustion, and thus can reasonably adjust the flow rate of the combustible gas more quickly.

[0170] Fourthly, the present invention can be widely used in facilities such as the end of a flammable gas discharge pipeline, a device or valve outlet, and a breathing valve outlet, and is particularly suitable for scenes where there may be continuous discharge of flammable gas. As companies pay more and more attention to safety, their demand for high-quality burn-resistant flame arresters is increasing, and the present invention has broad application prospects.

[0171] The above are only preferred embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art can easily make changes or modifications within the disclosure scope of the present invention, and such changes or modifications should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A fire-resistant pipe end flame arrester, comprising: A housing (1) arranged on the end of the pipe, The fire-blocking mechanism comprises a sleeve (21) arranged above the housing (1), a plurality of fire-blocking cores (22) filled in the sleeve (21) and used to receive a flammable fluid, and a first pressure plate (23) and a second pressure plate (24) respectively arranged on both sides of the sleeve (21) and fixedly connected by a pin (25). The adjusting mechanism comprises a variable diameter disc assembly (3) arranged between the housing (1) and the second pressure disc (24), a shaft cylinder assembly (4) extending through the fire-blocking core (22), and a plurality of connecting rods (7) arranged between the variable diameter disc assembly and the shaft cylinder assembly.

2. The fire-resistant pipe end flame arrester according to claim 1, characterized in that: The variable diameter disc assembly comprises a first turntable (31) configured in a hollow cover form, a second turntable (32) configured in an annular structure and arranged opposite to the first turntable (31), and a disc (33) arranged inside the first turntable (31) and the second turntable (32), wherein a plurality of slide grooves (301) arranged at intervals are formed on both the first turntable (31) and the second turntable (32).

3. The fire-resistant pipe end flame arrester according to claim 2, characterized in that: The disc (33) comprises a plurality of disc segments (331) arranged in a circumferential direction and configured in a fan-shaped structure, and protrusions (332) extending radially outward and used to form a sliding connection with the slide groove (301) are formed on both sides of each disc segment (331).

4. The burn-resistant pipe end flame arrester according to claim 3, characterized in that: The shaft cylinder assembly comprises a body in the form of a hollow sleeve arranged at the center of the sleeve (21), a piston arranged in the body, and a memory alloy (413) in the form of a curve fixedly connected to the top end of the piston. The memory alloy (413) is configured to straighten and push the piston downward when the temperature rises, so as to cause the disc (33) to shrink inward in the first turntable (31), and to recover and pull the piston upward when the temperature drops, so as to cause the disc (33) to expand outward in the first turntable (31).

5. The fire-resistant pipe end flame arrester according to claim 3, characterized in that: The shaft-cylinder assembly comprises a body configured in the form of a hollow sleeve and arranged at the center of the sleeve (21), a piston sealingly connected to the inner circumferential surface of the body, and a pusher arranged above the piston and located in a cavity of the body, wherein the pusher can expand in the cavity when the temperature rises, thereby pushing the piston to move downward, so as to cause the disc (33) to shrink inward in the first turntable (31).

6. The burn-resistant pipe end flame arrester according to claim 5, characterized in that: The pushing member is configured as liquid water.

7. The fire-resistant pipe end flame arrester according to claim 6, characterized in that: At least one through hole for communicating with the cavity is circumferentially arranged on the side wall of the body, and the through hole is located below the piston in an initial state.

8. The burn-resistant pipe end flame arrester according to claim 5, characterized in that: The pusher is configured as an intumescent coating applied on the inner wall of the cavity.

9. The fire-resistant pipe end flame arrester according to claim 8, characterized in that: The intumescent coating comprises any one of expanded graphite and polyurethane rigid foam.

10. The burn-resistant pipe end flame arrester according to any one of claims 4 to 9, characterized in that: The shaft cylinder assembly also includes a push rod (5) fixedly connected to the bottom end of the piston, and a circular ring (52) arranged at the free end of the push rod (5).

11. The fire-resistant pipe end flame arrester according to claim 10, characterized in that: The push rod (5) is provided with a first engaging portion (51) extending radially outwards. The shaft cylinder assembly further comprises a second engaging portion (6) arranged in the body and configured in an annular form for forming a threaded connection with the first engaging portion (51).

12. The fire-resistant pipe end flame arrester according to claim 11, characterized in that: The connecting rod (7) comprises a first connecting rod portion (701) with a larger diameter hinged on the second rotating disk (32), and a second connecting rod portion (702) with a smaller diameter hinged on the circular ring (52).

13. The fire-resistant pipe end flame arrester according to claim 12, characterized in that: The fire-blocking mechanism further comprises a plurality of partitions (8) which are arranged in the sleeve (21) along the circumferential direction and are used to separate adjacent fire-blocking cores (22). The partitions (8) comprise any one of a square, an ellipse and a triangle.

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