CN210603864U - Encapsulating runs through seal structure - Google Patents
Encapsulating runs through seal structure Download PDFInfo
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- CN210603864U CN210603864U CN201921788334.4U CN201921788334U CN210603864U CN 210603864 U CN210603864 U CN 210603864U CN 201921788334 U CN201921788334 U CN 201921788334U CN 210603864 U CN210603864 U CN 210603864U
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Abstract
The utility model discloses a encapsulating runs through seal structure, including bearing cap (1), container lid (2), wire (3) and glue layer (4). The utility model discloses a encapsulating runs through seal structure has a great deal of advantages such as withstand water pressure ability reinforce, the sealed difficult leakage of multilayer, simple structure easily operate.
Description
Technical Field
The utility model relates to a encapsulating runs through seal structure, especially a encapsulating runs through seal structure for water pressure detects belongs to sealed detection area.
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, the prior art needs to research and design a simple and effective sealing structure capable of withstanding high pressure.
SUMMERY OF THE UTILITY MODEL
In order to overcome the problem, the utility model discloses the people has carried out the research of sharp, designs a encapsulating and runs through seal structure.
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 a preferred embodiment, a sealing ring 5 is further disposed between the pressure-bearing cap 1 and the container cap 2.
In a preferred embodiment, a pressure-bearing cap groove 11 is formed in a lower surface of the pressure-bearing cap 1, a container cap groove 22 is formed in a corresponding position of the container cap 2, the packing 5 is disposed between the pressure-bearing cap groove 11 and the container cap groove 22,
further, 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.
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 utility model discloses, after passing bearing cover 1 and through-hole 21 with wire 3, locate the encapsulating at through-hole 21 for glue fills the gap between wire 3 and the 21 lateral walls of through-hole, forms glue layer 4.
In the present invention, 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.
A certain amount of 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 a preferred embodiment, the upper hard glue layer 41 is formed by curing ethyl cyanoacrylate glue.
And a certain amount of glue is poured into the lower part of the upper hard glue layer 41 again to form a middle soft glue layer 42, the thickness of the middle soft glue layer 42 is 1/3-1/2 of the thickness of the through hole 21, and in a preferred embodiment, the middle soft glue layer 42 is formed after epoxy resin soft glue is cured.
And pouring a certain amount of 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, and in a preferred embodiment, the lower hard glue layer 43 is formed by curing the same ethyl cyanoacrylate glue as the upper hard glue layer 41.
Compared with the prior art, the utility model provides a pair of encapsulating runs through seal structure's beneficial effect lies in:
1. the utility model provides a glue pouring penetration sealing structure which can adapt to higher water pressure;
2. the utility model provides a glue filling penetration sealing structure, which has a multilayer sealing structure and is not easy to leak;
3. the utility model provides a pair of encapsulating runs through seal structure, simple structure, easily operation.
Drawings
Fig. 1 shows a schematic view of a glue-pouring through seal structure according to a preferred embodiment of the present invention;
fig. 2 shows a schematic view of a glue-filled through seal structure according to a preferred embodiment of the present invention;
fig. 3 shows a schematic view of a sealing ring according to a preferred embodiment of the invention;
fig. 4 shows a schematic view of a sealing ring according to a preferred embodiment of 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 explained in more detail below with reference to the drawings and preferred embodiments. The features and advantages of the present invention will become more apparent from the description.
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 utility model, as shown in figure 1, the glue-pouring through sealing structure comprises a 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 furthermore, the aperture of the through hole 21 is not more than 100mm 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 a preferred embodiment, a packing 5 is further provided between the pressure-bearing cap 1 and the container cap 2 to further ensure structural sealability, 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 a 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,
further, the height of the sealing ring 5 is greater than the sum of the depths of the pressure-bearing cover groove 11 and the container cover groove 22, so that the sealing ring 5 is combined with the pressure-bearing cover 1 and the container cover 2 more tightly, and a better sealing effect is achieved.
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 utility model, after the lead 3 passes through the 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,
further, the wire 3 has many heels, regularly arranges in through-hole 21 for glue layer 4 around the wire 3 distributes evenly, with better pressure-bearing effect.
Utility model people discover, when water pressure exceeded 20Mpa, glue layer 4 very easily appeared glue layer chap, glue layer and through-hole 21 faying face and appeared tearing, finally leaded to seal structure leakage phenomenon to appear, can't continue to maintain sealed effect.
In order to solve the above-mentioned problems generated under high water pressure, the glue layer 4 comprises at least three layers, from top to bottom, an upper hard glue layer 41, a middle soft glue layer 42 and a lower hard glue layer 43.
A certain amount of 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,
furthermore, the upper hard glue layer 41 is formed by curing glue with high adhesive strength and high glue layer hardness, and preferably glue with glue layer hardness higher than 80D is used for supporting the middle soft glue layer 42.
In a preferred embodiment, 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.
In 41 below on the upper portion hard glue layer, pour into a certain amount of 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, furtherly, middle part soft glue layer 42 has the glue solidification of certain flexibility for the glue film after the solidification and forms, and preferred glue film hardness is less than 98A's glue for middle part soft glue layer 42 can be compressed in the through-hole 21 axial after receiving the extrusion, and the radial inflation in through-hole 21, 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 a preferred embodiment, the middle soft adhesive layer 42 is formed by curing an epoxy 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 pouring a certain amount of 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.
Furthermore, the lower hard glue layer 43 is formed by curing glue with high bonding strength and high glue layer hardness, and preferably glue with glue layer hardness higher than 80D is used for supporting the middle soft glue layer 42.
In a preferred embodiment, 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 use of the glue 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 utility model also provides a method that is used for encapsulating of nuclear pressure vessel water pressure test to run through sealedly, include following step:
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 10-100 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 a preferred embodiment, before the glue A is poured, the glue A is heated to 30-50 ℃ so that the flowability of the glue A is better and the glue layer after glue pouring 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 a preferred embodiment, before the glue B is poured, the glue B is heated to 30-50 ℃ so that the flowability of the glue B is better and 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 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 a preferred embodiment, before the glue C is poured, the glue C is heated to 30-50 ℃ so that the flowability of the glue C is better and the glue layer after glue pouring is more uniform,
and S36, standing the container cover 2 until the glue C is completely cured.
Examples
Example 1
Performing a hydraulic pressure strain test on the light water reactor pressure shell, and performing the following steps:
And 2, penetrating a lead of the strain gauge for detection through the through hole and the pressure bearing cover.
heating DELO-DUOPOX epoxy resin glue to 35 ℃, uniformly mixing, pouring into the through hole, stopping pouring until the thickness of the epoxy resin glue layer is 1/3 of the thickness of the through hole, vibrating for 10 seconds under the conditions that the vibration frequency is 10-100 Hz and the amplitude is 0.2-2 mm, and standing until the glue is completely cured;
heating α -ethyl cyanoacrylate glue to 35 ℃, pouring the glue into the through hole until the thickness of the through hole is 1/3 of the thickness of the glue layer, vibrating for 1S under the conditions that the vibration frequency is 10-100 Hz and the amplitude is 0.2-2 mm, and standing until the glue is completely cured.
And 4, mounting the pressure shell cover on the light water reactor pressure shell.
And 5, filling high-pressure water into the light water reactor pressure shell, and performing a hydraulic pressure strain test.
The actual water pressure is increased to 50Mpa, the phenomena of dripping and leakage do not occur at the position where the glue is poured and penetrates through the sealing, and the sealing effect is good.
Comparative example 1
Other steps are unchanged, only the step 3 in the embodiment 1 is replaced by glue filling at the through hole, α -ethyl cyanoacrylate glue is heated to 35 ℃ and then filled in the through hole, the vibration frequency is 10-100 Hz, the vibration amplitude is 0.2-2 mm, and the vibration is carried out for 2S, and the glue is kept stand until the glue is completely cured.
When the actual water pressure is increased to 5Mpa, slight dripping and leakage occur at the penetrating and sealing position of the pouring glue.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", and the like indicate the position or positional relationship based on the operation state of the present invention, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The present invention has been described in detail with reference to the preferred embodiments and the exemplary embodiments. It should be noted, however, that these specific embodiments are only illustrative explanations of the present invention, and do not set any limit to the scope of the present invention. Without departing from the spirit and scope of the present invention, various modifications, equivalent replacements, or modifications may be made to the technical content and embodiments thereof, which all fall within the scope of the present invention. The protection scope of the present invention is subject to the appended claims.
Claims (7)
1. A glue-pouring penetration sealing structure is characterized by comprising 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),
a through hole (21) is arranged on the container cover (2), a lead (3) passes through the pressure-bearing cover (1) and the through hole (21),
the glue layer (4) is formed after glue is filled in the through hole (21), the glue layer (4) comprises at least three layers which are an upper hard glue layer (41), a middle soft glue layer (42) and a lower hard glue layer (43) respectively,
the middle soft adhesive layer (42) is formed by curing glue with the adhesive layer hardness lower than 98A.
2. A glue-filled through seal according to claim 1,
the upper hard glue layer (41) is formed by curing glue with glue layer hardness higher than 80D,
the lower hard glue layer (43) is formed after glue with glue layer hardness higher than 80D is cured.
3. A glue-filled through seal according to claim 1,
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).
4. A glue-filled through seal according to claim 1,
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).
5. A glue-filled through seal according to claim 1,
the aperture of the through hole (21) is not more than 100 mm.
6. A glue-filled through seal according to 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).
7. A glue penetration seal according to claim 6,
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.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921788334.4U CN210603864U (en) | 2019-10-23 | 2019-10-23 | Encapsulating runs through seal structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921788334.4U CN210603864U (en) | 2019-10-23 | 2019-10-23 | Encapsulating runs through seal structure |
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| CN210603864U true CN210603864U (en) | 2020-05-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110739089A (en) * | 2019-10-23 | 2020-01-31 | 哈电集团（秦皇岛）重型装备有限公司 | glue pouring penetration sealing structure and sealing method |
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- 2019-10-23 CN CN201921788334.4U patent/CN210603864U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110739089A (en) * | 2019-10-23 | 2020-01-31 | 哈电集团（秦皇岛）重型装备有限公司 | glue pouring penetration sealing structure and sealing method |
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