CN210904768U

CN210904768U - Sealing structure of fire control nozzle

Info

Publication number: CN210904768U
Application number: CN201921541501.5U
Authority: CN
Inventors: 蒋海平
Original assignee: Zhuji Haiwang Fire Equipment Co ltd
Current assignee: Zhuji Haiwang Fire Equipment Co ltd
Priority date: 2019-09-17
Filing date: 2019-09-17
Publication date: 2020-07-03
Anticipated expiration: 2029-09-17

Abstract

The embodiment of the utility model provides a seal structure of fire control shower nozzle belongs to fire control shower nozzle technical field, seal structure includes: the nozzle base is internally provided with a flow passage, and an accommodating cavity is arranged opposite to the flow passage; the plug corresponds to the flow channel and is arranged in the accommodating cavity; the sealing element is arranged in the accommodating cavity and is arranged between the plug and the flow channel; the thermal sensitive component is arranged in the spray head seat, and two ends of the thermal sensitive component are respectively contacted with the spray head seat and the plug; the thermosensitive assembly acts on the plug and enables the sealing element to be attached to the flow channel through the plug. The technical effects of heat resistance, aging resistance and stable sealing effect of the sealing component are achieved.

Description

Sealing structure of fire control nozzle

Technical Field

The utility model relates to a fire control shower nozzle technical field especially relates to a seal structure of fire control shower nozzle.

Background

At present, the fire-fighting nozzle mainly comprises a nozzle seat, a plug and a thermosensitive assembly, the working principle is that the plug is sealed in a matching way by arranging a rubber sealing ring and the nozzle seat, the thermosensitive assembly and the nozzle seat are matched to limit the position of the plug, the plug is short of support when the thermosensitive assembly is heated, and the plug is separated from the nozzle seat under the action of water pressure in a pipeline, so that the normal work of the nozzle seat is realized.

But the rubber seal who now uses widely in the fire control shower nozzle can be ageing, and is not ageing-resistant, exists rubber seal and is heated and melt for link between end cap and the nozzle seat, influence the normal triggering of fire control shower nozzle.

Therefore, the technical problems of the prior art are as follows: the chemical stability of the rubber sealing ring in the fire-fighting nozzle is not enough, so that the plug and the nozzle seat are adhered.

Disclosure of Invention

The embodiment of the application provides a sealing structure of a fire-fighting nozzle, which solves the technical problem that a plug is adhered to a nozzle seat due to insufficient chemical stability of a rubber sealing ring in the fire-fighting nozzle in the prior art; the technical effects of heat resistance, aging resistance and stable sealing effect of the sealing component are achieved.

The embodiment of the application provides a seal structure of fire control shower nozzle, seal structure includes: the nozzle base is internally provided with a flow passage, and an accommodating cavity is arranged opposite to the flow passage; the plug corresponds to the flow channel and is arranged in the accommodating cavity; the sealing element is a polytetrafluoroethylene element and is arranged in the accommodating cavity, and the sealing element is arranged between the plug and the flow channel; the thermal sensitive component is arranged in the spray head seat, and two ends of the thermal sensitive component are respectively contacted with the spray head seat and the plug; the thermosensitive assembly acts on the plug and enables the sealing element to be attached to the flow channel through the plug.

Preferably, the sealing member is a poly-tetrachloroethylene sheet.

Preferably, the sealing element and the plug are bonded or attached.

Preferably, the accommodating cavity corresponds to the flow channel, the caliber of the accommodating cavity is larger than that of the flow channel, a step end face is formed between the accommodating cavity and the flow channel, and the sealing element is attached to the step end face.

Preferably, the nozzle seat is provided with a first protrusion relative to the stepped end surface, and the first protrusion is annular and concentrically arranged relative to the flow channel; wherein, the sealing member is attached to the first protrusion, so that a line seal is formed between the sealing member and the first protrusion.

Preferably, a second protrusion is arranged on the lower end surface of the plug relative to the sealing element, and the second protrusion is annular; wherein, the sealing member is attached to the second protrusion, so that a line seal is formed between the sealing member and the second protrusion.

Preferably, an inner side surface of the first protrusion and an inner wall of the flow channel are coplanar.

Preferably, the heat-sensitive component has elasticity compensation capability, so that the heat-sensitive component can supplement the deformation amount of the sealing element when the sealing element is deformed.

Preferably, the thermosensitive assembly is a glass ball assembly, an elastic compensation piece is arranged on the glass ball assembly, and the action direction of the elastic compensation piece on the glass ball assembly is consistent with the action direction of the plug on the sealing piece.

Preferably, the heat-sensitive component is a fusible alloy component, the fusible alloy component has a lever structure, and the lever structure enables the fusible alloy component to have elasticity compensation capability.

Preferably, the fusible alloy component is provided with an elastic force compensation member, the elastic force compensation member acts on the fusible alloy component, and the elastic force compensation capability of the fusible alloy component is enhanced through the elastic force compensation member.

Preferably, a part or the whole of the plug is a thin body, and the plug has elasticity compensation capability through the thin body.

One or more technical solutions in the embodiments of the present application have at least one or more of the following technical effects:

1. in the embodiment of the application, the traditional rubber sealing ring is replaced by the sealing element made of the polytetrafluoroethylene material, the thermal sensitive component acts on the plug, and the plug acts on the sealing element, so that the sealing element is tightly attached to the flow channel, the flow channel is sealed, and the sealing performance is stable under the pressure of 50 kilograms; the technical problem that a plug and a nozzle seat are adhered due to insufficient chemical stability of a rubber sealing ring in a fire-fighting nozzle in the prior art is solved; the technical effects of heat resistance, aging resistance and stable sealing effect of the sealing component are achieved.

2. In the embodiment of the application, through be provided with annular first arch on the ladder terminal surface for during sealing member and ladder terminal surface cooperation, sealing member and first protruding laminating are sealed for the line by traditional face seal optimization design, make when regard as the sealing member with the polytetrafluoroethylene material, avoid the polytetrafluoroethylene material because the hardness is high, the shortcoming that face seal reliability is low, reach sealed stable technological effect.

3. In the embodiment of the application, the thickness of the sealing element is reduced after being pressed for a long time by optimizing the elasticity compensation capability of the thermosensitive assembly; specifically, the glass ball component has no elastic compensation capability, and an elastic compensation piece is required to be additionally arranged to provide the glass ball component with the elastic compensation capability; particularly, when the fusible alloy component is a fusible alloy component, the fusible alloy component is of a lever structure, and has elasticity compensation capability, so that an elasticity compensation part is not required to be additionally arranged.

Drawings

FIG. 1 is a schematic structural view of a sealing structure of a fire sprinkler in an embodiment of the present application;

FIG. 2 is an enlarged view taken at A in FIG. 1;

FIG. 3 is a schematic cross-sectional view of a lower half portion of a sealing structure of a fire sprinkler according to an embodiment of the present application;

FIG. 4 is an enlarged view at B in FIG. 3;

FIG. 5 is an exploded view in section of a sealing structure of a fire sprinkler according to an embodiment of the present application;

FIG. 6 is a schematic sectional exploded view of a sealing structure of a fire sprinkler according to an embodiment of the present application;

FIG. 7 is a schematic sectional top view of a sealing structure of a fire sprinkler according to another embodiment of the present application;

FIG. 8 is a schematic structural view of a sealing structure of yet another fire sprinkler according to an embodiment of the present application;

FIG. 9 is a schematic sectional view of a lower half portion of a sealing structure of a fire sprinkler according to still another embodiment of the present application;

FIG. 10 is a schematic structural view showing a sealing structure of yet another fire sprinkler according to an embodiment of the present application;

FIG. 11 is a schematic sectional view of the lower half of a sealing structure of yet another fire sprinkler according to an embodiment of the present application;

FIG. 12 is an enlarged view at C of FIG. 11;

FIG. 13 is a schematic sectional view of the lower half of a sealing structure of yet another fire sprinkler according to an embodiment of the present application;

fig. 14 is an enlarged view at D in fig. 13.

Reference numerals: 1. a nozzle base; 11. a support portion; 12. a flow channel; 13. a first protrusion; 14. an accommodating cavity; 15. a guide part; 2. a glass ball assembly; 3. a plug; 31. a groove; 32. a second protrusion; 4. a screw; 5. an elastic force compensating member; 51. an elastic member; 52. fitting parts; 6. a seal member; 7. a first limit piece; 8. a second limiting member; 9. a fusible alloy component.

Detailed Description

The embodiment of the application provides a sealing structure of a fire-fighting nozzle, a polytetrafluoroethylene sealing element 6 is arranged to replace a traditional rubber sealing ring, a thermal sensitive component acts on a plug 3, the plug 3 acts on the sealing element 6, so that the sealing element 6 is tightly attached to a flow channel 12, the flow channel 12 is sealed, and the sealing performance is stable under the pressure of 50 kilograms; the technical problem that the plug 3 is adhered to the nozzle seat 1 due to insufficient chemical stability of a rubber sealing ring in the fire-fighting nozzle in the prior art is solved; the technical effects of heat resistance, aging resistance and stable sealing effect of the sealing component are achieved.

In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.

Example one

Referring to the accompanying figures 1-5 of the specification, a sealing arrangement for a fire sprinkler, the sealing arrangement comprising: the spray nozzle comprises a spray nozzle base 1, a plug 3, a sealing element 6, a thermosensitive assembly and a first limiting piece 7; the thermosensitive assembly acts on the plug 3, the sealing element 6 is attached to the flow channel 12 through the plug 3, and the technical effect that the sealing element 6 seals the flow channel 12 is achieved.

The nozzle base 1 is internally provided with a flow passage 12, and an accommodating cavity 14 is arranged opposite to the flow passage 12; the aperture of the accommodating cavity 14 is larger than the aperture of the flow channel 12, and a stepped end surface is formed between the accommodating cavity 14 and the flow channel 12. The first bulge 13 is arranged on the end face, opposite to the step, of the spray nozzle base 1, the first bulge 13 is annular, the outer surface of the annular shape is smooth and free of burrs and sharp edges, and therefore the first bulge is prevented from scratching the sealing element during assembly; the cross-sectional area of the first protrusion 13 is gradually reduced from bottom to top, and is concentrically arranged with respect to the flow channel 12.

Specifically, the inner side surface of the first protrusion 13 and the inner wall of the flow channel 12 are coplanar; the outer side surface of the first protrusion 13 is an inclined surface, and the inclined surface is inclined from bottom to top towards the inner side surface of the first protrusion 13. Preferably, the first protrusion 13 is obtained by machining, and the first protrusion 13 and the nozzle holder 1 are integrated.

The plug 3 corresponds to the flow channel 12, and the plug 3 is arranged in the accommodating cavity 14; the bottom surface of the plug 3 corresponds to the sealing element 6, and the bottom surface is preferably a smooth surface, so that the thin sealing element 6 is prevented from being scratched by the bottom surface of the plug 3, and the sealing effect of the sealing element 6 is ensured.

The sealing element 6 is made of an anti-aging plastic material, has no elasticity, is hard, is anti-aging, has a smooth surface, has good self-lubricating property and is easy to slide; the thickness of the polytetrafluoroethylene sheet or the polytetrafluoroethylene film is preferably 0.08-0.1 mm, the thinner the sealing element 6 is, the smaller the deformation amount of the sealing element 6 is, the maximum deformation amount of the sealing element is controlled, so that the elastic compensation element 5 can compensate the deformation amount of the sealing element 6, the deformation of the sealing element 6 is more controllable, the compensation amount of the deformation amount required in the whole fire sprinkler head is small, and the sealing effect is stable when the polytetrafluoroethylene sealing element 6 is achieved. The sealing member 6 is bonded to the bottom surface of the plug 3, so that the sealing member 6 does not slip with respect to the bottom surface of the plug 3, and when the sealing member 6 is fixed to the plug 3, the bottom surface of the sealing surface or the first protrusion 13 is not scratched.

Specifically, the sealing element 6 is arranged in the accommodating cavity 14, and the sealing element 6 is arranged between the plug 3 and the stepped end surface; the sealing element 6 is attached to the first protrusion 13, and the cross-sectional contact position of the attached position is preferably a point rather than a surface, so that a line seal is formed between the sealing element 6 and the first protrusion 13.

Particularly, after the fire sprinkler head is connected with a fire-fighting pipe network, the pushing and sucking force generated by the reciprocating water hammer movement in the pipe network can lead the sealing element 6 to be repeatedly pulled along the water flow direction, so that the sealing element 6 and the first bulge 13 are continuously rubbed to generate abrasion. The sealing element in the application can be provided with a through hole at the central position, so that the pushing and sucking force is reduced, and the pulling force is reduced. The sealing element with the through hole can still maintain the sealing performance under the action of the plug, because if the through hole is not formed, the sealing element is equivalent to a diaphragm on the water pipe port, and if the through hole is formed, the diaphragm is ineffective and does not bear the pushing and sucking force.

The thermal sensitive component is arranged in the nozzle base 1, two ends of the thermal sensitive component are respectively contacted with the nozzle base 1 and the plug 3, the upper part of the nozzle base 1 is provided with a supporting part 11, the supporting part 11 is provided with a screw 4 for fixing and pressing the thermal sensitive component, and the thermal sensitive component transmits pressure from the screw 4 so that the sealing element 6 is pressed.

In particular, the heat-sensitive component has a spring force compensation capability, so that the heat-sensitive component can supplement the deformation amount of the sealing member 6 when the sealing member 6 is deformed. The thermosensitive assembly is specifically a glass ball assembly 2, an elastic compensation piece 5 is arranged on the glass ball assembly 2, and the action direction of the elastic compensation piece 5 on the glass ball assembly 2 is consistent with the action direction of the plug 3 on the sealing piece 6.

The elastic compensation piece 5 comprises an elastic piece 51, and the elastic piece 51 can be arranged between the plug 3 and the thermosensitive assembly and also can be arranged between the thermosensitive assembly and the supporting part 11 on the upper part of the spray head base 1; a plurality of sets of symmetrical elastic members 51 may also be provided, the elastic members 51 tilt the heat sensitive component, and the acting direction of the elastic compensation member 5 on the glass ball component 2 is kept consistent with the acting direction of the plug 3 on the sealing member 6 under the condition that the symmetrical elastic members 51 counteract the relatively tilted partial acting force. In order to uniformly apply force between the elastic member 51 and the thermal sensitive component, an attachment member 52 may be provided, and the attachment member 52 is disposed between the elastic member 51 and the thermal sensitive component, so that the force applied by the elastic member 51 to the thermal sensitive component is uniform. Preferably, the elastic member 51 is a spring, which is sleeved on the screw 4 and located between the support portion 11 and the thermal sensitive component, and an engaging member 52 is disposed between the spring and the thermal sensitive component.

Because the polytetrafluoroethylene sealing element 6 is easy to slip, the sealing element 6 is easy to slip relative to the first protrusion 13 during assembly, the sealing element 6 is likely to be cost-effective, and the sealing effect is unstable or poor.

The first limiting piece 7 is located between the nozzle base 1 and the plug 3, preferably between the accommodating cavity 14 and the plug 3, so as to limit the position of the plug 3 relative to the accommodating cavity 14 and prevent the plug 3 from rotating relative to the accommodating cavity 14, and because the sealing piece 6 is bonded with the plug 3, the sealing piece 6 is also limited under the condition that the plug 3 is fixed, so that the slippage between the sealing piece 6 and the first protrusion 13 is reduced, the possibility of scratching the sealing piece 6 is small, and the sealing effect is stable. Specifically, the first limiting member 7 may be a plastic ring or a rubber O-ring, a groove 31 is formed in the side surface of the plug 3, the plastic ring is sleeved on the groove 31 in the side surface of the plug 3, and when the plug 3 is placed in the accommodating cavity 14, the plastic ring is located in a gap between the accommodating cavity 14 and the plug 3, so that the plug 3 is limited. The plastic ring is preferably designed to be in a groove form or a hollow form, so that the plastic ring has a deformation capability, and the plug 3 is more stable in a limited manner.

Particularly, the upper end of the accommodating cavity 14 is provided with a guide part 15, and the guide part 15 is in a flaring form, such as a chamfer, so that when the plug 3 is placed in the accommodating cavity 14, the plug 3 can be conveniently placed above the accommodating cavity 14 to apply force downwards, so that the plug 3 smoothly enters the accommodating cavity 14 until the sealing element 6 bonded below the plug 3 contacts and is attached to the first protrusion 13.

Example two

Reference is made to fig. 6 of the specification; on the basis of the first embodiment, the sealing member 6 is further optimized, specifically:

the sealing element 6 is a polytetrafluoroethylene sheet body, the sealing element 6 and the plug 3 are not bonded and are independent parts, and the sealing element 6 is thin, preferably 0.08-0.1 mm. In the embodiment of the present application, the emphasis is placed on the thickness of the sealing member in order to control the deformation amount of the teflon sealing member, so that the elastic compensation member has enough capacity to give the sealing member a slight displacement caused by the deformation, so that the sealing member always maintains a close contact with the first protrusion and the plug.

When the sealing device is used, the sealing element 6 is firstly placed into the accommodating cavity 14, then the plug 3 is placed into the accommodating cavity 14, the sealing element 6 is attached to the first protrusion 13 through the plug 3, and the technical effect of sealing is achieved.

EXAMPLE III

Reference is made to fig. 7 of the specification; on the basis of the first or second embodiment, the first limiting member 7 is further optimized, specifically:

on the basis of canceling or reserving the first limiting part 7, a second limiting part 8 is additionally arranged, the second limiting part 8 is arranged in the accommodating cavity 14 and clamped between the accommodating cavity 14 and the plug 3, and therefore the plug 3 is prevented from shaking in the accommodating cavity 14.

Specifically, the second limiting member 8 preferably has a certain elastic deformation capability, such as a deformable plastic block with a groove or a rubber block made of a special material.

Example four

Reference is made to figures 8-9 of the specification; on the basis of the first embodiment, the second embodiment or the third embodiment, the heat-sensitive component is further optimized, and specifically:

the glass ball component 2 of the thermosensitive component is changed into the fusible alloy component 9, the fusible alloy component 9 has a lever structure and has deformation capacity, and the lever structure enables the fusible alloy component 9 to have certain elasticity compensation capacity. Therefore, the fusible alloy component 9 can be optionally provided with the elastic compensation part 5, or can be optionally not provided with the elastic compensation part 5, when the fusible alloy component 9 is provided with the elastic compensation part 5, the elastic compensation part 5 acts on the fusible alloy component 9, and the elastic compensation capability of the fusible alloy component 9 is enhanced through the elastic compensation part 5.

EXAMPLE five

With reference to the attached fig. 10 of the specification, on the basis of the first, second or third embodiment, the thermosensitive assembly is further optimized, specifically:

the glass ball component 2 is designed into a lever type structure, so that the glass ball component 2 has a lever structure and has deformation capacity, and the glass ball component 2 has certain elasticity compensation capacity through the lever structure. Therefore, the glass ball component 2 can be optionally provided with the elastic compensation part 5, or can be optionally not provided with the elastic compensation part 5, when the glass ball component 2 is provided with the elastic compensation part 5, the elastic compensation part 5 acts on the glass ball component 2, and the elastic compensation capability of the glass ball component 2 is enhanced through the elastic compensation part 5.

EXAMPLE six

On the basis of the first, second, third, fourth or fifth embodiment, the plug 3 is further optimized, specifically:

the plug is made of special steel, such as stainless steel in elastic steel, the local part or the whole part of the plug is processed into a thin body, the minimum thickness of the thin body is between 1.5 and 5mm, and the plug has the elastic deformation capacity and the elastic compensation capacity of the plug on a sealing element by depending on the material characteristics of the plug. Wherein, the plug is preferably processed into a sheet shape, and the minimum thickness is 2 or 3 mm.

EXAMPLE seven

Reference is made to fig. 11-12 of the specification; on the basis of the first, second, third, fourth, fifth or sixth embodiment, the plug 3 is further optimized, specifically:

the first bulge 13 is eliminated or reserved, on the basis, a second bulge 32 is arranged on the lower end face of the plug 3, the second bulge 32 is annular, and the second bulge acts on the sealing element 6, so that line sealing is formed between the plug 3 and the sealing element 6, and the sealing effect is enhanced.

In the case where the first projection 13 is left, it is preferable that the second projection 32 and the first projection 13 are arranged in a staggered manner, and it is preferable that the second projection 32 is located outside the first projection 13.

Specifically, the second protrusion 32 and the plug 3 are preferably integrated, so that the second protrusion 32 can be more easily machined on the plug 3 than the first protrusion 13, and the second protrusion 32 with high precision can be machined to meet the requirement of wire sealing.

Example eight

Reference is made to fig. 13-14 of the specification; on the basis of the seventh embodiment, the plug 3 and the sealing member 6 are further optimized, specifically:

the seal 6 is provided with a hole relative to the plug 3 and the lower part of the plug 3 is located in the flow passage 12 through the seal 6. The end cap 3 penetrates through the sealing element 6 to process a sealing effect, so that the water pressure in the flow channel acts on the end cap 3, the acting force of the water pressure in the flow channel on the sealing element 6 is reduced, and the sealing between the sealing element 6 and the end cap 3 is more reliable.

The working principle is as follows:

the polytetrafluoroethylene sealing element 6 is aging-resistant, and the problem of rubber seal ring bonding is solved.

The reason for providing the elasticity compensator 5 is: because sealing member 6 of polytetrafluoroethylene material is hard, and does not have elasticity, observe the discovery, sealing member 6 is under heat sensitive component's effect, and sealing member 6 can be out of shape gradually, and deformation can not reset, if the sealing member of thinner polytetrafluoroethylene material, although the deformation volume is little, still can influence the leakproofness, consequently set up an elasticity compensating part 5, the deformation of compensating member 6 is come through the elastic deformation of elasticity compensating part 5, guarantee to keep laminating between sealing member 6 and first arch or the second arch all the time.

The reason for setting the first limiting member 7 or the second limiting member 8 is as follows: due to the relation of processing precision, the fit between the plug 3 and the accommodating cavity 14 is not precise, and the plug 3 can shake relative to the accommodating cavity 14; and in the process of screwing the thermosensitive assembly by the screw during assembly, the screw 4 drives the thermosensitive assembly, the thermosensitive assembly drives the plug 3, the plug 3 drives the sealing element 6 to rotate relative to the first bulge 13, so that the sealing element 6 is scratched by the first bulge 13, the wire sealing is damaged, and the long sealing is influenced.

The technical effects are as follows:

4. In the embodiment of the application, the thickness of the sealing element is emphasized to control the deformation amount of the polytetrafluoroethylene sealing element, so that the elastic compensation element has enough capacity to give the sealing element a slight displacement caused by deformation, and the sealing element is always kept in close contact with the first protrusion and the plug.

While the preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A sealing structure of a fire sprinkler, the sealing structure comprising:

the nozzle base is internally provided with a flow passage, and an accommodating cavity is arranged opposite to the flow passage;

the plug corresponds to the flow channel and is arranged in the accommodating cavity;

the sealing element is arranged in the accommodating cavity and is arranged between the plug and the flow channel; and

the thermosensitive assembly is arranged in the spray head seat, and two ends of the thermosensitive assembly are respectively contacted with the spray head seat and the plug;

the thermosensitive assembly acts on the plug and enables the sealing element to be attached to the flow channel through the plug.

2. The seal of claim 1, wherein the seal is adhesively or snugly disposed with respect to the plug.

3. The sealing structure according to claim 1, wherein the receiving cavity is disposed corresponding to the flow channel, an aperture of the receiving cavity is larger than an aperture of the flow channel, a stepped end surface is formed between the receiving cavity and the flow channel, and the sealing member is attached to the stepped end surface.

4. The seal structure according to claim 3, wherein said nozzle mount is provided with a first projection with respect to said stepped end surface, said first projection being annular; wherein, the sealing member is attached to the first protrusion, so that a line seal is formed between the sealing member and the first protrusion.

5. The seal structure of claim 1, wherein the lower end surface of the plug is provided with a second projection with respect to the seal, the second projection being annular; wherein, the sealing member is attached to the second protrusion, so that a line seal is formed between the sealing member and the second protrusion.

6. The seal structure of claim 1, wherein said heat responsive element has spring force compensation capability such that said heat responsive element supplements the amount of deformation of the seal when said seal is deformed.

7. The sealing structure according to claim 6, wherein the heat sensitive component is a glass ball component, and an elastic compensation member is arranged on the glass ball component, and the action direction of the elastic compensation member on the glass ball component is consistent with the action direction of the plug on the sealing member.

8. The sealing structure according to claim 6, characterized in that the heat sensitive component is embodied as a fusible alloy component, the fusible alloy component has a lever structure, and the lever structure provides the fusible alloy component with a spring force compensation capability.

9. The seal structure according to claim 8, wherein an elastic force compensator is provided on the fusible alloy member, the elastic force compensator acting on the fusible alloy member and increasing an elastic force compensating ability of the fusible alloy member by the elastic force compensator.

10. The sealing structure according to any one of claims 1 to 9, wherein the stopper is partially or entirely thin, and the thin body provides the stopper with elastic compensation capability.