An explosion-proof and flame-retardant self-enclosed stainless steel bellows for connecting gas appliances

Abstract

The present invention relates to the technical field of bellows, and specifically to an explosion-proof and flame-retardant self-enclosed stainless steel bellows for connecting gas appliances, comprising an outer tube and an inner tube coaxially arranged inside the outer tube; the inner tube has a diameter smaller than that of the outer tube and forms a sealed cavity between the outer tube; a self-leakage repairing module is arranged in the sealed cavity; the self-leakage repairing module is provided with a flexible sealing element capable of dividing the sealed cavity into an inner chamber and an outer chamber, and self-repairing elements respectively arranged in the inner chamber and the outer chamber for sealing leaks; a one-way self-closing module is coaxially arranged at the access end of the inner tube; the one-way self-closing module is coaxially arranged at the output end of the inner tube; the present invention can not only timely and efficiently seal the leak when gas leaks, but also realize self-sealing of the transmission pipeline.

Description

Technical Field

[0001] The invention relates to the technical field of bellows, and in particular to an explosion-proof and flame-retardant self-enclosed stainless steel bellows for connecting gas appliances. Background Art

[0002] With the widespread use of modern urban gas, the safety and durability of gas appliance connection pipes have become particularly important. Traditional gas connection pipes are mainly made of rubber or plastic materials. Although these materials are low in cost, they are easily affected by environmental factors during long-term use, and may experience aging, cracking and other problems, leading to gas leakage, which in turn may cause safety accidents such as fires and explosions. In addition, when leaks occur, existing connection pipes lack effective flame retardant properties and self-sealing functions, and are unable to prevent gas leakage in the early stages of a fire, further exacerbating the severity of the accident.

[0003] In order to solve the above problems, stainless steel bellows have gradually become an ideal choice for gas appliance connections due to their excellent corrosion resistance, flexibility and pressure resistance. However, existing stainless steel bellows still have certain limitations, mainly manifested in the lack of explosion-proof and flame-retardant design. When pipeline leaks, there are major safety hazards and they cannot effectively prevent gas leakage and pipeline bursting. In addition, the realization of the self-sealing function in the existing technology is not perfect enough. When gas leaks or encounters external impact, the gas source cannot be cut off in time, which increases potential safety hazards. Summary of the invention

[0004] In view of the above problems, an explosion-proof and flame-retardant self-sealing stainless steel bellows for connecting gas appliances is provided. By proposing a bellows that can timely and efficiently plug the leaking point when a leak occurs in the stainless steel bellows and can achieve self-sealing of the pipeline, the technical problem that the existing gas bellows cannot plug the leaking point and cannot achieve self-sealing of the pipeline when a gas leak occurs during use is solved.

[0005] In order to solve the problems of the prior art, the present invention provides an explosion-proof and flame-retardant self-enclosed stainless steel bellows for connecting gas appliances, including an outer tube and an inner tube coaxially arranged in the outer tube; the inner tube has a smaller diameter than the outer tube and forms a sealed cavity with the outer tube; a self-leakage repairing module is arranged in the sealed cavity; the self-leakage repairing module is provided with a flexible sealing element capable of dividing the sealed cavity into an inner chamber and an outer chamber, and self-repairing elements respectively arranged in the inner chamber and the outer chamber for plugging the leakage points; a one-way blocking module is coaxially arranged at the access end of the inner tube; and a one-way self-closing module is coaxially arranged at the output end of the inner tube.

[0006] Preferably, the flexible sealing element is a rubber ring.

[0007] Preferably, the self-healing element is polyurethane foam.

[0008] Preferably, the self-replenishing element is a self-replenishing colloid.

[0009] Preferably, a fault-tolerant ring is coaxially arranged outside the outer tube and communicated with the inside of the outer tube.

[0010] Preferably, the one-way blocking module includes a first cylinder and a transmission mesh plate arranged in the first cylinder; the transmission mesh plate is coaxially fixed in the first cylinder and arranged near the access end of the inner tube; a sealing plate capable of axially sliding along the axis of the transmission mesh plate is also coaxially arranged in the middle part of the transmission mesh plate.

[0011] Preferably, a sealing rubber ring is coaxially fixedly provided on the surface of one side of the sealing plate close to the transmission mesh plate.

[0012] Preferably, the one-way self-closing module includes a second cylinder, a conical plate arranged in the second cylinder, and a guide cylinder coaxially arranged behind the conical plate; the guide cylinder has a diameter smaller than the inner diameter of the second cylinder and forms an annular channel with the second cylinder; the edge of the conical plate is also densely covered with first transmission holes connected to the annular channel.

[0013] Preferably, the one-way self-closing module further includes an intercepting ring coaxially arranged outside the guide tube, and the intercepting ring is arranged in the annular channel.

[0014] Preferably, the one-way self-closing module further comprises a sealing plate coaxially fixedly arranged at the end of the second cylinder and a guide tube vertically arranged at a side of the sealing plate close to the guide tube; the guide port of the guide tube is arranged close to the conical plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention realizes the effect of dividing the sealed cavity formed between the outer tube and the inner tube into an outer chamber and an inner chamber through a flexible sealing element, and at the same time, by injecting self-repairing elements into the outer chamber and the inner chamber respectively, the effect of quickly sealing the leakage point when the inner tube or the outer tube is broken is realized.

[0017] 2. The present invention realizes the effect of how to allow the self-leakage repairing module arranged in the sealing cavity to move freely when the stainless steel bellows is axially adjusted by the fault-tolerant ring coaxially arranged outside the outer tube, which will not affect the free adjustment of the stainless steel bellows and the effect of quickly repairing the leakage point.

[0018] 3. The present invention realizes the effect of how to only provide gas conduction while allowing the self-replenishing element to quickly close the transmission channel through a one-way self-closing module, and realizes the effect of how to conduct gas normally in a non-leakage state and assist the self-replenishing element to quickly close the transmission channel in a leakage state. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional diagram of an explosion-proof and flame-retardant self-enclosed stainless steel bellows for connecting gas appliances.

[0020] Figure 2 It is a side view of an explosion-proof and flame-retardant self-enclosed stainless steel bellows for connecting gas appliances.

[0021] Figure 3 yes Figure 2 Cross-sectional view at AA.

[0022] Figure 4 yes Figure 3 A partial enlarged view of point B.

[0023] Figure 5 yes Figure 3 A partial enlarged view of point C.

[0024] Figure 6 yes Figure 3 A partial enlarged view of point D.

[0025] Figure 7 It is a top view of an explosion-proof and flame-retardant self-enclosed stainless steel bellows for connecting gas appliances.

[0026] Figure 8 yes Figure 7 A three-dimensional cross-sectional view of the section at EE.

[0027] Fig. 9 It is a partial structural exploded stereogram of the one-way barrier module in a stainless steel bellows for connecting explosion-proof and flame-retardant self-enclosed gas appliances.

[0028] The numbers in the figure are:

[0029] 1. Outer tube; 11. Fault-tolerant ring; 12. Introduction nozzle;

[0030] 2. Inner tube; 21. Outer chamber; 22. Inner chamber;

[0031] 3. Self-leakage repair module; 31. Flexible sealing element; 32. Self-leakage repair element;

[0032] 4. One-way blocking module; 41. First cylinder; 42. Transmission mesh plate; 43. Sealing plate; 44. Guide rod; 45. Flange; 46. Spring; 47. Sealing rubber ring;

[0033] 5. One-way self-closing module; 51. Second cylinder; 52. Conical plate; 521. First transmission through hole; 53. Guide cylinder; 54. Intercepting ring; 55. Second transmission through hole; 56. Sealing plate; 57. Lead-out cylinder; 58. Third transmission through hole. DETAILED DESCRIPTION

[0034] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0035] See also Figures 1 to 8 As shown: an explosion-proof and flame-retardant self-enclosed stainless steel bellows for connecting gas appliances, comprising an outer tube 1 and an inner tube 2 coaxially arranged in the outer tube 1; the inner tube 2 is smaller in diameter than the outer tube 1 and forms a sealed cavity with the outer tube 1; a self-leakage repairing module 3 is arranged in the sealed cavity; the self-leakage repairing module 3 is provided with a flexible sealing element 31 capable of dividing the sealed cavity into an inner chamber 22 and an outer chamber 21, and a self-repairing element 32 respectively arranged in the inner chamber 22 and the outer chamber 21 for plugging the leakage point; a one-way blocking module 4 is coaxially arranged at the access end of the inner tube 2; and a one-way self-closing module 5 is coaxially arranged at the output end of the inner tube 2.

[0036] When transmitting gas through the stainless steel bellows, first connect the access end of the stainless steel bellows to the external gas supply equipment; then connect the output end of the stainless steel bellows to the gas equipment; in the subsequent use, when the outer tube 1 of the stainless steel bellows is broken during long-term use, under the action of the flexible sealing element 31 and the inner tube 2, the gas transmitted through the inner tube 2 will not leak from the broken part of the outer tube 1, and the self-repairing element 32 arranged in the outer chamber 21 will leak due to the leakage of the outer tube 1, and expand after contacting with the external air during the overflow, thereby achieving the self-repairing effect of the leakage point; when the inner tube 2 of the stainless steel bellows leaks, the gas at this time will enter the inner chamber 22 along the leakage point, but because the flexible sealing element 31 is also provided in the sealed cavity, the gas cannot pass through the inner chamber 22 to be transmitted to the outer chamber 21, and due to the existence of the leakage point In this case, the self-repairing element 32 located in the inner chamber 22 will also leak along the leak point toward the inner tube 2, thereby achieving the effect of plugging the leak point through the self-repairing element 32, and as the gas continues to flow into the inner chamber 22, the self-repairing element 32 located in the inner chamber 22 is pushed by the inflowing gas to overflow from the leak point, thereby achieving the effect of plugging the leak point. If the leak point is large, the self-repairing element 32 that overflows into the bellows will be pushed to the one-way interception module 4 under the conduction of the gas, and the one-way interception module 4 is blocked, thereby achieving the self-sealing effect of the bellows; and when the self-repairing element 32 overflows from the leak point in large quantities, the self-repairing element 32 at this time will be completely filled in the bellows, achieving a complete sealing effect on the bellows; thereby achieving the self-leakage and self-sealing effect of the leak point of the bellows, thereby avoiding technical problems such as deflagration and explosion that are prone to occur due to continuous leakage of gas from the leak point.

[0037] See also Figure 5As shown: the flexible sealing element 31 is a rubber ring.

[0038] The shape of the rubber ring is matched with the shape of the outer wall of the inner tube 2 and is folded along the outer wall of the inner tube 2 to form a corresponding shape; by adopting the rubber ring as the flexible sealing element 31, its excellent elasticity and flexibility can enable the rubber ring to maintain its sealing performance under different temperature and pressure conditions to ensure that the gas does not leak; and because the rubber sealing ring has excellent elasticity and flexibility, when the gas enters the inner chamber 22, the rubber ring can also be used to achieve the effect of pushing the self-repairing element 32 located in the outer chamber 21 toward the leak point, thereby achieving the purpose of efficient self-repairing of the leak point through the self-repairing element 32.

[0039] See also Figure 3 As shown: the self-repairing element 32 is polyurethane foam.

[0040] The polyurethane foam is injected into the outer chamber 21 and the inner chamber 22 in liquid form when not in use;

[0041] When the inner tube 2 of the bellows breaks during use and the gas leaks from the break into the sealed cavity, the self-repairing element 32, i.e., the polyurethane foam, located in the sealed cavity will overflow from the break and rapidly expand at the leak point by utilizing its unique physical and chemical properties, thereby achieving the purpose of efficiently repairing the leak point.

[0042] See also Figure 3 As shown: the self-replenishing element 32 is a self-replenishing colloid.

[0043] By using self-repairing colloid to seal the leak point, the leak point can also be quickly sealed.

[0044] See also Figure 3 As shown: the outer tube 1 is coaxially surrounded by a fault-tolerant ring 11 which is connected to the inner part of the outer tube 1 .

[0045] When the self-repairing element 32 is injected into the outer chamber 21, the self-repairing element 32 is completely filled in the outer chamber 21, but does not enter the fault-tolerant ring 11, so that when the side wall of the outer tube 1 leaks, the self-repairing element 32 can be used to quickly repair the leak point, while leaving an accommodation space for the flexible sealing element 31 and the self-repairing element 32 to adaptively surge when the stainless steel bellows is adjusted;

[0046] The fault-tolerant rings 11 are arranged in multiple groups equidistantly along the axis of the outer tube 1 and are all arranged at the wave crest of each outer tube 1 and are connected to the interior of the outer tube 1; by coaxially arranging the fault-tolerant rings 11 connected to the interior of the outer tube 1 on the outer wall of the outer tube 1, it can be achieved that when the stainless steel bellows needs to be telescopically adjusted, the stainless steel bellows in the adjustment state will not be unable to autonomously telescopically adjust due to the flexible sealing element 31 arranged in its sealing cavity, and when the stainless steel bellows is adjusted, such as axially contracted, when the stainless steel bellows is axially compressed, the flexible sealing element 31 and the self-complementing element 32 located in the sealing cavity will automatically surge toward the fault-tolerant ring 11, thereby automatically adjusting the adjustment space for the longitudinal expansion and contraction of the stainless steel bellows; further, the outer wall of the fault-tolerant ring 11 is also radially provided with an introduction nozzle 12; the introduction nozzle 12 is used to introduce the self-complementing element 32 into the outer chamber 21.

[0047] See also Figure 4 and Fig. 9 As shown: the one-way blocking module 4 includes a first cylinder 41 and a transmission mesh plate 42 arranged in the first cylinder 41; the transmission mesh plate 42 is coaxially fixedly arranged in the first cylinder 41 and is arranged close to the access end of the inner tube 2; a sealing plate 43 capable of axially sliding along the axis of the transmission mesh plate 42 is also coaxially arranged in the middle part of the transmission mesh plate 42.

[0048] The sealing plate 43 is arranged on one side of the transmission mesh plate 42 close to the one-way self-closing module 5;

[0049] The one-way blocking module 4 further includes a guide rod 44, which is coaxially and vertically arranged on a side of the sealing plate 43 close to the transmission mesh plate 42, and the rod portion of the guide rod 44 passes through the transmission mesh plate 42 and is slidably matched with the transmission mesh plate 42; the end of the guide rod 44 is also coaxially provided with a flange 45 and a spring 46 coaxially sleeved and installed outside the guide rod 44; the two ends of the spring 46 are respectively in contact with the adjacent surfaces of the flange 45 and the sealing plate 43;

[0050] The transmission mesh plate 42 is a circular disk with holes densely distributed on its surface;

[0051] In the non-working state, the sealing plate 43 is always pressed against the surface of the transmission mesh plate 42 under the elastic force of the spring 46, thereby achieving the effect of sealing the through holes opened on the surface of the transmission mesh plate 42; when the stainless steel pipe is connected to the external gas supply equipment, when the gas is set to enter the inner tube 2 from the access end of the inner tube 2, the gas is continuously transmitted and acts on the sealing plate 43 through the transmission mesh plate 42, thereby pushing the sealing plate 43 to slide axially toward the one-way self-closing module 5, thereby achieving the effect of opening the through holes opened on the transmission mesh plate 42, so that the gas can enter the inner tube 2 and be normally conducted through the inner tube 2; further, in order to ensure that the gas in the transmission state can normally push open the sealing plate 43, the elastic force of the spring 46 is less than the gas supply pressure of the gas; it can also be achieved through other structures for the purpose of one-way conduction of gas.

[0052] See also Fig. 9 As shown, a sealing rubber ring 47 is coaxially fixedly disposed on the surface of the sealing plate 43 on one side close to the transmission mesh plate 42 .

[0053] In order to provide a better sealing effect, a rubber ring is coaxially fixedly arranged on the side surface close to the transmission mesh plate 42, so that the contact surface can be further sealed when the sealing plate 43 and the transmission mesh plate 42 are in contact with each other. This ensures that when a large leak occurs in the inner tube 2 and the self-repairing element 32 is completely expanded in the inner tube 2, the self-repairing element 32 in the expanded state will not pass through the transmission mesh plate 42 to solve the technical problem of reverse flow during the process of pushing the sealing plate 43 and the transmission mesh plate 42 together from the inside, thereby completely realizing the self-sealing of the transmission channel inside the bellows and avoiding gas leakage.

[0054] See also Figure 6 and Figure 8 As shown: the one-way self-closing module 5 includes a second cylinder 51, a conical plate 52 arranged in the second cylinder 51, and a guide cylinder 53 coaxially arranged behind the conical plate 52; the diameter of the guide cylinder 53 is smaller than the inner diameter of the second cylinder 51 and forms an annular channel with the second cylinder 51; the edge of the conical plate 52 is also densely covered with first transmission holes 521 connected to the annular channel.

[0055] The guide tube 53 is disposed at the rear side of the conical plate 52 and is fixedly connected to the conical plate 52; the conical plate 52 is disposed at one end of the second cylinder 51 close to the one-way self-closing module 5;

[0056] When the self-compensating element 32 leaks into the inner tube 2 and is transmitted toward the conical plate 52 driven by the gas, due to the conical plate 52 being set in a conical shape, when the self-compensating element 32 contacts, it will slide to the first transmission through hole 521 under the guidance of the conical plate 52, and expand at the first transmission through hole 521 until the first transmission through hole 521 is blocked. When the smaller self-compensating element 32 passes through the first transmission through hole 521 and enters the annular channel, it will accumulate in the annular channel until it expands to block the annular channel. The transmission diameter of the annular channel is preferably set to the minimum, so that the self-compensating element 32 can achieve the effect of quickly closing the annular channel; and the annular channel formed by the guide tube 53 and the second cylinder 51 can achieve the effect of extending the conduction path and space of the self-compensating element 32, so that the self-compensating element 32 can have sufficient curing time; thereby achieving the self-closing effect of the transmission channel inside the bellows; avoiding the technical problem of combustion and explosion caused by further leakage of gas.

[0057] See also Figure 6 and Figure 8 As shown, the one-way self-closing module 5 also includes an interception ring 54 coaxially arranged outside the guide tube 53, and the interception ring 54 is arranged in the annular channel.

[0058] The surface of the interception ring 54 is also provided with a second transmission through hole 55; and the diameter of the second transmission through hole 55 is smaller than that of the first transmission through hole 521; it is used to further intercept the self-complementing element 32 transmitted into the annular channel, and cooperate with the conical plate 52 to further compress the annular channel space, so that the self-complementing element 32 can quickly and efficiently fill the annular channel, thereby achieving complete blocking of the annular channel.

[0059] See also Figure 6 and Figure 8 As shown: the one-way self-closing module 5 also includes a sealing plate 56 coaxially fixedly arranged at the end of the second cylinder 51 and a guide tube 57 vertically arranged on the sealing plate 56 close to the guide tube 53; the inlet of the guide tube 57 is arranged close to the conical plate 52.

[0060] A third transmission through hole 58 is radially formed on one side of the outlet tube 57 close to the sealing plate 56;

[0061] The guide tube 57 is funnel-shaped and arranged from small to large, and the inlet is arranged close to the conical plate 52; since the third transmission through hole 58 is opened on the side of the guide tube 57 close to the sealing plate 56; and the inlet of the guide tube 57 is arranged close to the conical plate 52, even if there is a small amount of self-compensating elements 32 entering the guide tube 53, they will pass through the third transmission through hole 58 and fall to the outer wall of the guide tube 57, and will not enter the inlet of the guide tube 57, thereby completely eliminating the problem that the self-compensating elements 32 will enter the gas equipment during the blocking process.

[0062] The present invention can not only effectively stop the leakage point in time when the gas leaks, but also realize the self-sealing of the transmission pipeline.

[0063] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. An explosion-proof and flame-retardant self-enclosed stainless steel bellows for connecting gas appliances, characterized in that: The invention comprises an outer tube (1) and an inner tube (2) coaxially arranged inside the outer tube (1); the inner tube (2) has a smaller diameter than the outer tube (1) and forms a sealed cavity with the outer tube (1); a self-leakage repairing module (3) is arranged inside the sealed cavity; the self-leakage repairing module (3) is provided with a flexible sealing element (31) capable of dividing the sealed cavity into an inner chamber (22) and an outer chamber (21), and self-repairing elements (32) respectively arranged inside the inner chamber (22) and the outer chamber (21) for sealing the leaking point; a one-way blocking module (4) is coaxially arranged at the access end of the inner tube (2); and a one-way self-closing module (5) is coaxially arranged at the output end of the inner tube (2); The one-way blocking module (4) comprises a first cylinder (41) and a transmission mesh plate (42) arranged in the first cylinder (41); the transmission mesh plate (42) is coaxially fixedly arranged in the first cylinder (41) and arranged near the access end of the inner tube (2); a sealing plate (43) capable of axially sliding along the axis of the transmission mesh plate (42) is also coaxially arranged in the middle of the transmission mesh plate (42); The sealing plate (43) is arranged on a side of the transmission mesh plate (42) close to the one-way self-closing module (5); The one-way blocking module (4) further comprises a guide rod (44), wherein the guide rod (44) is coaxially and vertically arranged on a side of the sealing plate (43) close to the transmission mesh plate (42), and a rod portion of the guide rod (44) passes through the transmission mesh plate (42) and is slidably matched with the transmission mesh plate (42); a flange (45) and a spring (46) coaxially sleeved and mounted outside the guide rod (44) are coaxially arranged at the end of the guide rod (44); and two ends of the spring (46) are respectively in contact with adjacent surfaces of the flange (45) and the sealing plate (43); The one-way self-closing module (5) comprises a second cylinder (51), a conical plate (52) arranged inside the second cylinder (51), and a guide cylinder (53) coaxially arranged behind the conical plate (52); the guide cylinder (53) has a diameter smaller than the inner diameter of the second cylinder (51) and forms an annular channel with the second cylinder (51); the edge of the conical plate (52) is densely covered with first transmission through holes (521) communicating with the annular channel; The one-way self-closing module (5) further comprises an interception ring (54) coaxially arranged outside the guide cylinder (53), and the interception ring (54) is arranged in the annular channel; The one-way self-closing module (5) further comprises a sealing plate (56) coaxially fixedly arranged at the end of the second cylinder (51) and a guide tube (57) vertically arranged at a side of the sealing plate (56) close to the guide tube (53); the guide port of the guide tube (57) is arranged close to the conical plate (52); The transmission mesh plate (42) is circular and has a circular disk body with through holes densely distributed on its surface.

2. The explosion-proof and flame-retardant stainless steel bellows for connecting gas appliances according to claim 1, characterized in that: The flexible sealing element (31) is a rubber ring.

3. The explosion-proof and flame-retardant self-enclosed stainless steel bellows for connecting gas appliances according to claim 1, characterized in that: The self-repairing element (32) is polyurethane foam.

4. The explosion-proof and flame-retardant stainless steel bellows for connecting gas appliances according to claim 1, characterized in that: The self-replenishing element (32) is a self-replenishing colloid.

5. The explosion-proof and flame-retardant self-enclosed stainless steel bellows for connecting gas appliances according to claim 1, characterized in that: The outer tube (1) is also coaxially surrounded by a fault-tolerant ring (11) which is communicated with the interior of the outer tube (1).

6. The explosion-proof and flame-retardant self-enclosed stainless steel bellows for connecting gas appliances according to claim 1, characterized in that: A sealing rubber ring (47) is coaxially fixedly disposed on a surface of one side of the sealing plate (43) close to the transmission mesh plate (42).

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