阅读说明：本技术 一种灌胶贯穿密封结构及密封方法 (glue pouring penetration sealing structure and sealing method ) 是由 白海永 姚在山 张勇 赵亮 王帅 王擎宇 于 2019-10-23 设计创作，主要内容包括：本发明公开了一种灌胶贯穿密封结构,包括承压盖(1)、容器盖(2)、导线(3)和胶水层(4)。本发明的灌胶贯穿密封结构具有耐受水压能力强、多层密封不易泄漏、结构简单易操作等诸多优点。(The invention discloses an glue pouring through sealing structure which comprises a pressure-bearing cover (1), a container cover (2), a lead (3) and a glue layer (4).)

1, glue-pouring penetration seal structure, which is characterized in that the structure comprises a pressure-bearing cover (1), a container cover (2), a lead (3) and a glue layer (4),

the pressure-bearing cover (1) is fixed on the container cover (2),

the container cover (2) is provided with a through hole (21), and the lead (3) penetrates through the pressure bearing cover (1) and the through hole (21).

2. The kind of potting adhesive through seal structure of claim 1,

the glue layer (4) is formed after glue is filled in the through hole (21), and the glue layer (4) comprises at least three layers, namely an upper hard glue layer (41), a middle soft glue layer (42) and a lower hard glue layer (43).

3. The kind of potting adhesive through seal structure of claim 2,

the upper hard glue layer (41) is formed by curing glue with glue layer hardness higher than 80D,

the middle soft adhesive layer (42) is formed by curing glue with the adhesive layer hardness lower than 98A,

the lower hard glue layer (43) is formed after glue with glue layer hardness higher than 80D is cured.

4. The kind of potting adhesive through seal structure of claim 2,

the upper hard glue layer (41) is formed by curing ethyl cyanoacrylate glue,

the middle soft adhesive layer (42) is formed by curing epoxy resin soft glue,

the lower hard glue layer (43) is formed by curing glue which is the same as that of the upper hard glue layer (41).

5. The kind of potting adhesive through seal structure of claim 2,

the thickness of the upper hard glue layer (41) is 1/4-1/3 of the thickness of the through hole (21),

the thickness of the middle soft adhesive layer (42) is 1/3-1/2 of the thickness of the through hole (21),

the thickness of the lower hard adhesive layer (43) is 1/4-1/3 of the thickness of the through hole (21).

6. The kind of potting adhesive through seal structure of claim 1,

the aperture of the through hole (21) is not more than 100 mm.

7. The kind of potting adhesive through seal structure of claim 1,

threaded holes are arranged on the pressure bearing cover (1) and the container cover (2) to ensure that the pressure bearing cover (1) can be fixed with the container cover (2) through bolts,

the lower surface of the pressure-bearing cover (1) is provided with a pressure-bearing cover groove (11), the container cover (2) is provided with a corresponding container cover groove (22), and a sealing ring (5) is arranged between the pressure-bearing cover groove (11) and the container cover groove (22).

8. The kind of potting adhesive through seal structure of claim 7,

an annular groove (51) is formed in the upper end face and the lower end face of the sealing ring (5), and the section of the annular groove (51) is in a trapezoid shape with a narrow opening and a wide bottom.

9, A method for the glue pouring through seal of the hydraulic pressure test of the nuclear pressure container, which comprises the following steps:

s1, mounting the pressure-bearing cover (1) on the container cover (2);

s2, the lead (3) penetrates through the through hole (21) and the pressure bearing cover (1);

s3, pouring glue at the through hole (21) to form a glue layer (4);

and S4, mounting the container cover (2) on the container to be tested.

10. The method of claim 9, wherein the step S3 further includes the following sub-steps:

s31, pouring the glue A into the through hole (21), stopping pouring when the glue layer depth is 1/4-1/3 of the thickness of the through hole (21), and vibrating the container cover (2) to enable air mixed with the glue in the glue pouring process to be vibrated out of the glue layer, so that no air bubbles exist in the glue layer;

s32, standing the container cover (2) until the glue A is completely cured;

s33, filling the glue B into the through hole (21), stopping filling until the thickness of the glue B is 1/3-1/2 of the thickness of the through hole (21), and vibrating the container cover (2) while filling the glue B so that air mixed with the glue in the glue filling process is vibrated out of the glue layer and no bubbles exist in the glue layer;

s34, standing the container cover (2) until the glue B is completely cured;

s35, filling glue C into the through hole (21) until the through hole (21) is filled, and vibrating the container cover (2) to enable air mixed with the glue to be vibrated out of the glue layer in the glue filling process, so that no bubbles are generated in the glue layer;

s36, standing the container cover (2) until the glue C is completely cured.

Technical Field

The invention relates to glue pouring penetration sealing structures, in particular to glue pouring penetration sealing structures for water pressure detection, and belongs to the field of sealing detection.

Background

In nuclear industry applications, it is often necessary to measure the strain of the inner wall of a pressure vessel to verify the difference between the actual value and the theoretical data.

During actual measurement, the strain gauge is placed in a container, a hole needs to be formed in the container for leading out a lead of the strain gauge, and high-pressure water is injected into the container to complete the test.

When the strain of the inner wall of the pressure container is measured, the water pressure in the container is usually more than 20Mpa, the maximum water pressure can reach 50Mpa, and the phenomena of poor sealing, popping of the sealing device and the like often occur due to the fact that a common sealing device cannot bear the large pressure, so that energy waste and potential safety hazards are caused.

Therefore, there is a need in the art to develop and design simple and effective sealing structures capable of withstanding high pressures.

Disclosure of Invention

In order to overcome the above problems, the present inventors have conducted intensive studies to design sealant-filled through sealing structures.

The glue-pouring penetration sealing structure comprises a pressure-bearing cover 1, a container cover 2, a lead 3 and a glue layer 4,

the container cover 2 is provided with a through hole 21, and the aperture of the through hole 21 is not more than 100 mm.

The pressure-bearing cover 1 is fixed on the container cover 2, preferably, the pressure-bearing cover 1 is fixed with the container cover 2 by bolts, and threaded holes are provided on the pressure-bearing cover 1 and the container cover 2, so that the pressure-bearing cover 1 can be fixed with the container cover 2 by bolts.

In the preferred embodiments, a sealing ring 5 is further provided between the pressure-bearing cap 1 and the container cap 2.

In the preferred embodiments, a pressure-bearing cap groove 11 is provided on the lower surface of the pressure-bearing cap 1, a container cap groove 22 is provided at the corresponding position of the container cap 2, a packing 5 is provided between the pressure-bearing cap groove 11 and the container cap groove 22,

, the height of the sealing ring 5 is larger than the sum of the depths of the pressure-bearing cap groove 11 and the container cap groove 22.

More preferably, the upper and lower end surfaces of the sealing ring 5 are provided with annular grooves 51, and the cross-sectional shape of the annular groove 51 is a trapezoid with a narrow mouth and a wide bottom.

The pressure-bearing cover 1 is further provided with wire holes, the wires 3 penetrate through the pressure-bearing cover 1 through the wire holes, and the number of the wire holes is the same as that of the wires 3.

According to the invention, after the wire 3 passes through the pressure bearing cover 1 and the through hole 21, glue is filled in the through hole 21, so that the glue fills the gap between the wire 3 and the side wall of the through hole 21, and a glue layer 4 is formed.

In the present invention, the glue layer 4 includes at least three layers, i.e., an upper hard glue layer 41, a middle soft glue layer 42, and a lower hard glue layer 43.

quantitative glue is poured into the through hole 21, an upper hard glue layer 41 is formed after the glue is cured, the thickness of the upper hard glue layer 41 is 1/4-1/3 of the thickness of the through hole 21, and in preferred embodiments, the upper hard glue layer 41 is formed by curing ethyl cyanoacrylate glue.

And (3) filling quantitative glue below the upper hard glue layer 41 again to form a middle soft glue layer 42, wherein the thickness of the middle soft glue layer 42 is 1/3-1/2 of the thickness of the through hole 21, and in preferred embodiments, the middle soft glue layer 42 is formed by epoxy resin soft glue after curing.

And (3) filling quantitative glue below the middle soft glue layer 42 again to form a lower hard glue layer 43, wherein the thickness of the lower hard glue layer 43 is 1/4-1/3 of the thickness of the through hole 21, and in preferred embodiments, the lower hard glue layer 43 is formed by curing ethyl cyanoacrylate glue which is the same as that of the upper hard glue layer 41.

The invention also provides glue pouring penetration sealing method for the hydraulic pressure test of the nuclear pressure container, which comprises the following steps:

s1, mounting the pressure-bearing cover 1 on the container cover 2;

s2, leading the lead 3 to pass through the through hole 21 and the pressure bearing cover 1;

s3, pouring glue into the through hole 21 to form a glue layer 4;

and S4, mounting the container cover 2 on the container to be tested.

Specifically, step S3 further includes the following sub-steps:

s31, pouring the glue A into the through hole 21 until the glue layer depth is 1/4-1/3 of the thickness of the through hole 21, and vibrating the container cover 2 to enable air mixed with the glue in the glue pouring process to be vibrated out of the glue layer, so that no bubbles are in the glue layer;

preferably, the glue A is ethyl cyanoacrylate glue;

preferably, the vibration frequency of the vibration container cover 2 is 10 to 100Hz, the amplitude is 0.2 to 2mm, the vibration time of the vibration is not more than 3s,

in preferred embodiments, before filling the glue A, the glue A is heated to 30-50 ℃,

s32, standing the container cover 2 until the glue A is completely cured;

s33, filling the glue B into the through hole 21 until the thickness of the glue B is 1/3-1/2 of the thickness of the through hole 21, and vibrating the container cover 2 while filling the glue B so that air mixed with the glue in the glue filling process is vibrated out of a glue layer and further no bubbles exist in the glue layer;

preferably, the glue B is epoxy resin soft glue, the vibration frequency of the vibration container cover 2 is 10-100 Hz, the amplitude is 0.2-2 mm, the vibration time of vibration is 5-20 s,

in preferred embodiments, before filling glue B, glue B is heated to 30-50 ℃,

s34, standing the container cover 2 until the glue B is completely cured;

s35, filling glue C into the through hole 21 until the through hole 21 is filled, and vibrating the container cover 2 to enable air mixed with the glue to be vibrated out of a glue layer in the glue filling process, so that no bubbles exist in the glue;

preferably, the glue C and the glue A are the same as glue, the vibration frequency of the vibration container cover 2 is 30-150 Hz, the amplitude is 0.1-1 mm, the vibration time of vibration is not more than 3s,

in preferred embodiments, before the glue C is poured, the glue C is heated to 30-50 ℃ so that the fluidity of the glue C is better, the glue layer after glue pouring is more uniform,

and S36, standing the container cover 2 until the glue C is completely cured.

Compared with the prior art, the glue pouring penetration sealing structure provided by the invention has the beneficial effects that:

1. the glue pouring penetration sealing structure provided by the invention can adapt to higher water pressure;

2. the glue pouring penetration sealing structure provided by the invention has a multilayer sealing structure, and is not easy to leak;

3. the glue pouring penetration sealing structure provided by the invention is simple in structure and easy to operate.

Drawings

FIG. 1 shows a schematic view of a preferred embodiment of a potting adhesive through seal structure according to the present invention;

FIG. 2 shows a schematic view of preferred embodiments of the potting through seal structure according to the present invention;

FIG. 3 shows a schematic representation of the construction of preferred embodiments of a seal ring according to the invention;

fig. 4 shows a schematic view of preferred embodiments of the sealing ring according to the invention.

The reference numbers illustrate:

1-a pressure bearing cover;

11-bearing cover grooves;

2-container lid;

21-a through hole;

22-container lid recess;

3-a wire;

4-glue layer;

41-upper hard glue layer;

42-middle soft glue layer;

43-lower hard glue layer;

5-sealing ring;

51-annular groove.

Detailed Description

The invention is further illustrated in the drawings and detailed description of the preferred embodiment with the understanding that the nature and advantages of the invention will become more apparent.

The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

According to the glue pouring through sealing structure provided by the invention, as shown in fig. 1, the glue pouring through sealing structure comprises a pressure-bearing cover 1, a container cover 2, a lead 3 and a glue layer 4,

the container cover 2 is provided with a through hole 21 for leading out a lead wire 3 connected with the strain gauge for detection, and the aperture of the through hole 21 is not more than 100mm in steps so as to reduce the water pressure on the glue layer 4 during detection.

The pressure-bearing cover 1 is fixed on the container cover 2, when water pressure is great, for example, when more than 30Mpa, only rely on the bonding strength of glue can not effectively guarantee the effective combination of glue layer 4 and through-hole 21, and the design of pressure-bearing cover 1 for it can support glue layer 4, and then guarantees that the phenomenon of tearing can not appear between glue layer 4 and the through-hole 21, and then influences the sealed effect of structure.

Preferably, the pressure-bearing cover 1 is fixed to the container cover 2 through a bolt, and threaded holes are formed in the pressure-bearing cover 1 and the container cover 2, so that the pressure-bearing cover 1 can be fixed to the container cover 2 through the bolt, and the mechanical strength between the pressure-bearing cover 1 and the container cover 2 is improved by the fixing mode of the bolt, and then the pressure-bearing cover 1 can provide a large supporting force for the glue layer 4.

In preferred embodiments, a packing 5 is further provided between the pressure-bearing cap 1 and the container cap 2 to ensure the structural sealing performance in step , as shown in fig. 2, a pressure-bearing cap groove 11 is provided on the lower surface of the pressure-bearing cap 1, a container cap groove 22 is provided at the corresponding position of the container cap 2, the packing 5 is provided between the pressure-bearing cap groove 11 and the container cap groove 22,

, the height of the sealing ring 5 is greater than the sum of the depths of the pressure-bearing cap groove 11 and the container cap groove 22, so that the sealing ring 5 is more tightly combined with the pressure-bearing cap 1 and the container cap 2, thereby achieving better sealing effect.

More preferably, as shown in fig. 3, an annular groove 51 is opened on the upper and lower end surfaces of the sealing ring 5, the cross-sectional shape of the annular groove 51 is a trapezoid with a narrower mouth and a wider bottom,

as shown in fig. 4, the upper and lower end surfaces of the sealing ring 5 are respectively in contact with the pressure-bearing cover 1 and the container cover 2, so that the annular groove 51 forms a sealing cavity, when high-pressure water permeates into the sealing cavity formed by the annular groove 51, the high-pressure water firstly enters the sealing cavity formed by the annular groove 51, due to the trapezoidal design of the annular groove 51, the pressure generated by the water pressure acts on the trapezoidal edge, and the generated vertical separation makes the sealing ring 5 more tightly contact with the pressure-bearing cover 1 and the container cover 2, thereby improving the sealing effect.

The pressure-bearing cover 1 is further provided with wire holes, so that the wires 3 can pass through the pressure-bearing cover 1, and the number of the wire holes is the same as that of the wires 3.

According to the invention, after the lead 3 passes through the pressure bearing cover 1 and the through hole 21, glue is filled in the through hole 21, so that the glue is filled in the gap between the lead 3 and the side wall of the through hole 21 to form a glue layer 4, thereby achieving the sealing effect,

, the lead 3 has multiple heels regularly distributed in the through holes 21, so that the glue layers 4 around the lead 3 are uniformly distributed, and a better pressure bearing effect is achieved.

The inventor finds that when the water pressure exceeds 20Mpa, the glue layer 4 is easy to crack, and the joint surface between the glue layer and the through hole 21 is easy to tear, so that the leakage phenomenon of the sealing structure is finally caused, and the sealing effect cannot be continuously maintained.

In order to solve the series problems generated under high water pressure, in the present invention, the glue layer 4 includes at least three layers, an upper hard glue layer 41, a middle soft glue layer 42 and a lower hard glue layer 43 from top to bottom.

quantitative glue is firstly poured into the through hole 21, an upper hard glue layer 41 is formed after the glue is solidified, the thickness of the upper hard glue layer 41 is 1/4-1/3 of the thickness of the through hole 21,

further , the upper hard glue layer 41 is formed by curing a glue with high adhesive strength and high glue layer hardness, preferably a glue layer hardness higher than 80D, to support the middle soft glue layer 42.

In preferred embodiments, the upper hard glue layer 41 is formed by curing ethyl cyanoacrylate glue, and the ethyl cyanoacrylate glue has the advantages of low viscosity, good wettability and permeability, high curing speed, no need of long-time waiting, simplicity in use, no need of heating and pressurizing, high bonding strength and the like, and is suitable for rapid glue filling and sealing.

At upper portion hard glue layer 41 below, pour into ration glue once more, form middle part soft glue layer 42, the thickness of middle part soft glue layer 42 is 1/3 ~ 1/2 of through-hole 21 thickness, and step by step , middle part soft glue layer 42 has glue solidification formation of deciding the flexibility for the back glue film of solidification, and preferred glue film hardness is less than 98A's glue for middle part soft glue layer 42 can be compressed in the axial of through-hole 21 after receiving the extrusion, upwards expands at through-hole 21 footpath, and then improves the joint strength of middle part soft glue layer 42 and through-hole 21, improves the sealed effect of glue layer 4.

In preferred embodiments, the middle soft adhesive layer 42 is formed by curing an epoxy resin soft adhesive, which has the advantages of adjustable hardness, water resistance, high tensile strength, and the like, so that the middle soft adhesive layer 42 has a better sealing effect under high water pressure.

And (3) pouring quantitative glue again below the middle soft glue layer 42 to form a lower hard glue layer 43, wherein the thickness of the lower hard glue layer 43 is 1/4-1/3 of the thickness of the through hole 21.

Further , the lower hard glue layer 43 is formed by curing a glue with high adhesive strength and higher glue layer hardness, preferably a glue with glue layer hardness higher than 80D, to support the middle soft glue layer 42.

In preferred embodiments, the lower hard glue layer 43 is formed by curing the same glue as the upper hard glue layer 41, so as to reduce the variety of glue used and the complexity of the structure.

The glue layer 4 consisting of the upper hard glue layer 41, the middle soft glue layer 42 and the lower hard glue layer 43 solves the problem of cracking of the glue layer under the condition of high water pressure, improves the bonding strength of the glue layer and the through hole 21, and greatly improves the sealing effect of the structure under high pressure.

The invention also provides glue pouring penetration sealing method for the hydraulic pressure test of the nuclear pressure container, which comprises the following steps:

s1, mounting the pressure-bearing cover 1 on the container cover 2;

s2, leading the lead 3 to pass through the through hole 21 and the pressure bearing cover 1;

s3, pouring glue into the through holes 21 to form glue layers 4;

and S4, mounting the container cover 2 on the container to be tested.

Specifically, step S3 further includes the following sub-steps:

s31, pouring the glue A into the through hole 21 until the glue layer depth is 1/4-1/3 of the thickness of the through hole 21, and vibrating the container cover 2 to enable air mixed with the glue in the glue pouring process to be vibrated out of the glue layer, so that no bubbles are in the glue layer;

preferably, the glue A is ethyl cyanoacrylate glue;

preferably, the vibration frequency of the vibration container cover 2 is 10-100 Hz, the amplitude is 0.2-2 mm, and the vibration time of the vibration is not more than 3s, so that the bubbles in the glue solution can be completely vibrated out, the phenomenon that the glue solution solidification is influenced by the vibration to cause the reduction of the glue bonding strength is avoided,

in preferred embodiments, before filling the glue A, the glue A is heated to 30-50 ℃ so that the fluidity of the glue A is better, the glue layer after filling is more uniform,

s32, standing the container cover 2 until the glue A is completely cured;

s33, filling the glue B into the through hole 21 until the thickness of the glue B is 1/3-1/2 of the thickness of the through hole 21, and vibrating the container cover 2 while filling the glue B so that air mixed with the glue in the glue filling process is vibrated out of a glue layer and further no bubbles exist in the glue layer;

preferably, the glue B is epoxy resin soft glue,

because the viscosity of the glue B is high, bubbles are more easily mixed in the glue layer to cause uneven glue layer, preferably, the vibration frequency of the vibration container cover 2 is 10-100 Hz, the amplitude is 0.2-2 mm, and the vibration time of vibration is 5-20 s, so that the bubbles in the glue solution can be completely vibrated out, the phenomenon that the vibration affects the solidification of the glue solution to cause the reduction of the bonding strength of the glue solution is avoided,

in preferred embodiments, before the glue B is poured, the glue B is heated to 30-50 ℃ so that the fluidity of the glue B is better, the glue layer after glue pouring is more uniform,

s34, standing the container cover 2 until the glue B is completely cured;

s35, filling glue C into the through hole 21 until the through hole 21 is filled, and vibrating the container cover 2 to enable air mixed with the glue to be vibrated out of a glue layer in the glue filling process, so that no bubbles exist in the glue;

preferably, the glue C and the glue A are the same as glue;

preferably, the vibration frequency of the vibration container cover 2 is 30-150 Hz, the amplitude is 0.1-1 mm, so as to avoid the glue C from being vibrated out of the through hole 21, the vibration time of the vibration is not more than 3s, which can not only completely vibrate out the bubbles in the glue, but also avoid the phenomenon that the bonding strength of the glue is reduced due to the influence of the vibration on the glue solidification,

in preferred embodiments, before the glue C is poured, the glue C is heated to 30-50 ℃ so that the fluidity of the glue C is better, the glue layer after glue pouring is more uniform,

and S36, standing the container cover 2 until the glue C is completely cured.