CN112879674A - Converter station valve room is with little shutoff subassembly - Google Patents
Converter station valve room is with little shutoff subassembly Download PDFInfo
- Publication number
- CN112879674A CN112879674A CN202110356870.2A CN202110356870A CN112879674A CN 112879674 A CN112879674 A CN 112879674A CN 202110356870 A CN202110356870 A CN 202110356870A CN 112879674 A CN112879674 A CN 112879674A
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- Prior art keywords
- plugging
- small
- converter station
- expansion unit
- valve hall
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L5/00—Devices for use where pipes, cables or protective tubing pass through walls or partitions
- F16L5/02—Sealing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L5/00—Devices for use where pipes, cables or protective tubing pass through walls or partitions
- F16L5/02—Sealing
- F16L5/04—Sealing to form a firebreak device
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
Abstract
The invention provides a small plugging component for a converter station valve hall, which belongs to the technical field of plugging of the converter station valve hall and comprises the following components: the small plugging body is a heat insulating material, the small plugging body forms a ring shape around a gap to be plugged, and the ring formed by the small plugging body is provided with at least one vacancy for installing an expansion unit; and the expansion unit is made of a thermal expansion material and is arranged in an annular vacancy formed by the small plugging body. According to the small plugging component for the converter station valve hall, when the temperature of the converter station valve hall rises, the large plug can deform to a certain extent when heated, so that a gap is formed between the large plug and the small plug, the expansion unit is arranged in the empty position arranged on the small plug body, the expansion unit expands when heated to fill the gap, and the fire resistance and the sealing performance of the valve hall are guaranteed.
Description
Technical Field
The invention relates to the technical field of plugging of a converter station valve hall, in particular to a small plugging component for the converter station valve hall.
Background
The converter station valve hall is a closed building for placing the converter valve, and in the installation process of the converter transformer, a converter transformer valve sleeve needs to extend into the valve hall to be connected with the converter valve, namely the converter transformer valve sleeve needs to be installed through a wall. And the totally closed slight positive pressure of converter station valve hall needs to be guaranteed, and satisfy the fire prevention demand, consequently need separate converter valve and converter transformer through block structure. Occlusion structures are generally divided into large and small occlusions. The large plugging refers to a plugging main body with a large area, and comprises a plate, a keel, a covered edge and the like, wherein a penetrating piece (such as a sleeve) is connected with the large plugging plate or the position of seam filling plugging is a small plugging. The small plug mainly has the function of sealing a gap between the penetrating piece and the large plug and ensuring that the gap has the integrity and the heat insulation performance which are consistent with those of the large plug.
The existing small plug is usually densely filled by adopting an aluminum silicate needle blanket, and the aluminum silicate needle blanket is used as an inorganic refractory material, has the characteristics of high temperature resistance and low heat conductivity coefficient, and can meet the requirements of fire prevention and heat insulation.
However, the large plug can deform to some extent when heated, so that a gap is formed between the large plug and the small plug, but the elastic deformation of the aluminum silicate needle-punched blanket is not enough to fill the whole gap, so that the fire resistance and the sealing performance of the valve hall are affected, and the situations of smoke channeling, fire channeling and the like occur in the valve hall.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the defect that the existing small plug cannot densely fill the gap between the large plug and the penetrating piece, and the fire resistance and the sealing performance of the valve hall are influenced.
In order to solve the technical problem, the invention provides a small plugging component for a converter station valve hall, which comprises:
the small plugging body is a heat insulating material, the small plugging body forms a ring shape around a gap to be plugged, and the ring formed by the small plugging body is provided with at least one vacancy for installing an expansion unit;
and the expansion unit is made of a thermal expansion material and is arranged in an annular vacancy formed by the small plugging body.
The annular formed by the small plugging body is provided with a plurality of vacant spaces arranged at intervals, the expansion units are provided with a plurality of expansion units, and the expansion units are respectively arranged in the annular vacant spaces formed by the small plugging body.
The small plugging body is formed by combining a plurality of plugging units with the same shape, and the shape of the expansion unit is the same as that of the plugging unit.
The plugging units and the expansion units are alternately arranged in sequence.
The plugging unit with the expansion unit is wedge-shaped, and the one side of plugging unit that deviates from the closed angle sets up towards the face of catching a fire, the one side that deviates from the closed angle of expansion unit sets up towards the face of catching a fire.
The angle of the sharp angle of the wedge is 10-40 degrees, and the width of the side of the wedge far away from the sharp angle is 3-10 cm.
The small plugging body is an aluminum silicate needle-punched blanket.
The expansion multiplying power of the expansion unit is 2-5 times.
The expansion unit is a silicone fireproof sealant.
The technical scheme of the invention has the following advantages:
1. the invention provides a small plugging component for a converter station valve hall, which comprises a small plugging body and an expansion unit, wherein the small plugging body is made of heat-insulating materials and forms a ring shape by surrounding a gap to be plugged, the ring shape formed by the small plugging body is provided with at least one vacancy for installing the expansion unit, the expansion unit is made of a heat expansion material, and the expansion unit is arranged in the ring-shaped vacancy formed by the small plugging body. After the temperature of the converter station valve hall rises, the large plug can deform to a certain extent when being heated, so that a gap is formed between the large plug and the small plug, the expansion unit is arranged in a vacancy formed in the small plug body, the expansion unit expands when being heated to fill the gap, and the fire resistance and the sealing performance of the valve hall are guaranteed.
2. The invention provides a small plugging assembly for a converter station valve hall, wherein an annular formed by a small plugging body is provided with a plurality of vacant spaces arranged at intervals, a plurality of expansion units are arranged in the annular vacant spaces formed by the small plugging body respectively. The plurality of expansion units are arranged to ensure that the expansion units expand when heated to fill the gaps, so that the fire resistance and the sealing performance of the valve hall are ensured.
3. The small plugging assembly for the converter station valve hall is characterized in that the small plugging body is formed by combining a plurality of plugging units with the same shape, and the shape of each expansion unit is the same as that of each plugging unit, so that the plugging units and the expansion units can be conveniently installed in a matched mode.
4. According to the small plugging assembly for the converter station valve hall, the plugging units and the expansion units are sequentially and alternately arranged, so that the fireproof performance and the sealing performance of the valve hall are guaranteed, the plugging units and the expansion units are alternately arranged, the small plugging assembly is convenient to install, and the plugging units are stressed more uniformly when the expansion units expand.
5. According to the small plugging assembly for the converter station valve hall, the plugging unit and the expansion unit are both wedge-shaped, the side, away from the sharp corner, of the plugging unit faces the fire-facing side, and the side, away from the sharp corner, of the expansion unit faces the fire-backing side. The plugging unit and the expansion unit are both arranged in a wedge shape, so that the expansion unit is ensured to expand and extrude the plugging unit in the circumferential direction and the radial direction of the penetrating piece, and gaps are filled compactly; and, with the setting of shutoff unit head on fire, with expansion unit backfire setting, guarantee that expansion unit is heated can not too high, guarantee that expansion unit can not overheated inefficacy.
6. The small plugging component for the converter station valve hall has the advantages that the angle of the wedge-shaped sharp angle is 10-40 degrees, and the width of the wedge-shaped surface far away from the sharp angle is 3-10 cm. When the closed angle is too big, a gap is easily generated between the plugging unit and the expansion unit, when the width of the wedge-shaped surface far away from the closed angle is less than 3cm, the construction is more complicated, the efficiency is low, and when the width is more than 10cm, the gap is easy to appear.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of a plugging unit of a small plugging component for a converter station valve hall according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an expansion unit of a small plugging component for a valve hall of a converter station according to an embodiment of the present invention;
fig. 3 is a schematic overall structure diagram of a small plugging component for a converter station valve hall according to an embodiment of the present invention;
fig. 4 is a schematic view of an overall structure of a sleeve, a wall and a small plugging component of a valve hall of a converter station according to an embodiment of the present invention.
Description of reference numerals:
1. a plugging unit; 2. an expansion unit; 3. a wall body; 4. a sleeve.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
One embodiment of a small block assembly for a valve hall of a converter station as shown in fig. 1 to 3 comprises: the plugging device comprises a plurality of plugging units 1 and a plurality of expansion units 2, wherein the plugging units 1 are heat-insulating materials, and the expansion units 2 are heat-expandable materials. The plurality of plugging units 1 are arranged at intervals around a gap to be plugged to form an annular small plugging body, and a vacant space for installing the expansion unit 2 is formed between the adjacent plugging units 1, namely the plurality of plugging units 1 and the plurality of expansion units 2 are arranged alternately in sequence.
When converter station valve room temperature rose the back, big shutoff is heated and can produces certain deformation, leads to producing the gap between big shutoff and the little shutoff, through setting up shutoff unit 1 and expansion unit 2 in turn, expansion unit 2 is heated the inflation and fills up the gap, guarantees the fire proofness and the leakproofness in valve room, and shutoff unit 1 atress is more balanced when expansion unit 2 expands.
As shown in fig. 1 to 3, the plugging unit 1 and the expansion unit 2 are both wedge-shaped, and the plugging unit 1 and the expansion unit 2 have the same shape and size. The plugging unit 1 and the expansion unit 2 are both arranged to be wedge-shaped, and the expansion unit 2 is guaranteed to expand and extrude the plugging unit 1 in the circumferential direction and the axial direction of the penetrating piece so as to fill the gap compactly.
As shown in fig. 3, the side of the plugging unit 1 facing away from the sharp corner is arranged towards the fire-facing side, and the side of the expansion unit 2 facing away from the sharp corner is arranged towards the fire-facing side. With the setting of shutoff unit 1 meet a fire, with expansion unit 2 back fire setting, guarantee that expansion unit 2 is heated and can not be too high, ensure that expansion unit 2 can not overheated inefficacy.
In the embodiment, the angle of the sharp angle of the wedge is 10-40 degrees, and the width of the side of the wedge far away from the sharp angle is 3-10 cm. When the closed angle is too big, a gap is easily generated between the plugging unit 1 and the expansion unit 2, when the width of the wedge-shaped surface far away from the closed angle is less than 3cm, the construction is more complicated, the efficiency is low, and when the width is more than 10cm, the gap is easy to appear.
In the present embodiment, the plugging unit 1 is an aluminum silicate needled blanket with a bulk weight of 128kg/m3-160 kg/m3The heat conductivity coefficient is less than 0.153W/(m.k), the use temperature is not lower than 1100 ℃, and the tensile strength is not lower than 21 kPa.
In the embodiment, the expansion unit 2 is a silicone fire-proof sealant, the expansion ratio is 2-5 times, and the fire resistance limit is not less than 3 hours.
As shown in fig. 4, the small plugging component provided in this embodiment is applied to a converter station valve hall, a converter valve is arranged inside the valve hall, a converter transformer is arranged outside the valve hall, the converter valve and the converter transformer are connected through a casing 4, the casing 4 is arranged to penetrate through a wall 3 of the valve hall, a gap between the casing 4 and the wall 3 is plugged by the small plugging component for the converter station valve hall, and the width of the gap is usually 5cm-10 cm. The small plugging component is used for plugging a gap between the sleeve 4 and the wall 3, so that the fire resistance and the sealing performance of a converter station valve hall are ensured.
The plugging test is carried out on a small plugging assembly consisting of eight groups of plugging units and expansion units with different components and shapes, GB/T16400 aluminum silicate cotton and No. 3-6 aluminum silicate specified in the article specification of the product thereof are selected, and the specific materials of the plugging units and the expansion units in each group are as follows:
a first group:
the heat conductivity coefficient of the plugging unit and the aluminum silicate needled blanket is 0.149W/(m.k), and the volume weight is 180kg/m3The wedge-shaped sharp angle is 10 degrees, the classification temperature is No. 3, and the width of the wedge-shaped surface far away from the sharp angle is 5 cm.
The expansion unit has a wedge-shaped sharp angle of 10 degrees and a fire endurance of 3 h.
Second group:
the heat conductivity coefficient of the plugging unit and the aluminum silicate needled blanket is 0.150W/(m.k), and the volume weight is 160kg/m3The wedge-shaped sharp angle is 20 degrees, the classification temperature is No. 4, and the width of the wedge-shaped surface far away from the sharp angle is 3 cm.
The expansion unit has a wedge-shaped sharp angle of 20 degrees and a fire endurance of 3 h.
Third group:
the heat conductivity coefficient of the plugging unit and the aluminum silicate needled blanket is 0.152W/(m.k), and the volume weight is 128kg/m3The wedge-shaped sharp angle is 20 degrees, the classification temperature is No. 5, and the width of the wedge-shaped surface far away from the sharp angle is 3 cm.
The expansion unit has a wedge-shaped sharp angle of 20 degrees and a fire endurance of 3 h.
And a fourth group:
the heat conductivity coefficient of the plugging unit and the aluminum silicate needled blanket is 0.151W/(m.k), and the volume weight is 140kg/m3The wedge-shaped sharp angle is 30 degrees, the classification temperature is No. 6, and the width of the wedge-shaped surface far away from the sharp angle is 8 cm.
The expansion unit has a wedge-shaped sharp angle of 30 degrees and a fire endurance of 3 h.
And a fifth group:
the heat conductivity coefficient of the aluminum silicate needled blanket is 0.151W/(m.k); the bulk density was 140kg/m3The wedge-shaped sharp angle is 30 degrees, the classification temperature is No. 3, and the width of the wedge-shaped surface far away from the sharp angle is 8 cm.
The expansion unit has a wedge-shaped sharp angle of 20 degrees and a fire endurance of 2 h.
A sixth group:
the heat conductivity coefficient of the plugging unit and the aluminum silicate needled blanket is 0.151W/(m.k), and the volume weight is 140kg/m3The wedge-shaped sharp angle is 40 degreesClass temperature is No. 4, and the width of the wedge-shaped surface far away from the sharp corner is 12 cm.
The expansion unit has a wedge-shaped sharp angle of 40 degrees and a fire endurance of 3 h.
A seventh group:
the heat conductivity coefficient of the plugging unit and the aluminum silicate needled blanket is 0.153W/(m.k), and the volume weight is 128kg/m3The wedge-shaped sharp angle is 50 degrees, the classification temperature is No. 5, and the width of the wedge-shaped surface far away from the sharp angle is 10 cm.
The expansion unit has a wedge-shaped sharp angle of 50 degrees and a fire endurance of 3 h.
And an eighth group:
the heat conductivity coefficient of the plugging unit and the aluminum silicate needled blanket is 0.160W/(m.k), and the volume weight is 96kg/m3The wedge-shaped sharp angle is 30 degrees, the classification temperature is No. 6, and the width of the wedge-shaped surface far away from the sharp angle is 10 cm.
The expansion unit has a wedge-shaped sharp angle of 30 degrees and a fire endurance of 3 h.
The fire endurance tests were carried out for each group with reference to GB/T9978.1, and the results are given in the following table:
when using the little shutoff subassembly of this embodiment to carry out the shutoff to the space between wall body 3 and the sleeve pipe 4 in the converter station valve room, set up shutoff unit 1 and expansion unit 2 in turn in the space, and the one side that shutoff unit 1 deviates from the closed angle sets up towards converter transformer one side, and expansion unit 2 deviates from the one side setting of closed angle towards converter valve one side to closely knit the packing in space through a plurality of shutoff units 1 and a plurality of expansion unit 2.
To sum up, through setting up shutoff unit and expansion unit in turn, expansion unit thermal expansion fills up the gap, guarantees the fire prevention and the leakproofness in valve room, and shutoff unit atress is more balanced when expansion unit expands.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (9)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110356870.2A CN112879674B (en) | 2021-04-01 | 2021-04-01 | A small plugging component for converter station valve hall |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110356870.2A CN112879674B (en) | 2021-04-01 | 2021-04-01 | A small plugging component for converter station valve hall |
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| CN112879674B CN112879674B (en) | 2025-08-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116817035A (en) * | 2023-07-10 | 2023-09-29 | 应急管理部四川消防研究所 | Small sealing system for valve hall of UHV converter station |
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