A small plugging component for converter station valve hall

Abstract

The present invention provides a small plugging assembly for a converter station valve hall, which belongs to the technical field of converter station valve hall plugging, and comprises: a small plugging body, which is made of a heat-insulating material, and the small plugging body forms a ring around the gap to be plugged, and the ring formed by the small plugging body has at least one vacant space for installing an expansion unit; an expansion unit, which is made of a heat-expanding material, and the expansion unit is arranged in the vacant space of the ring formed by the small plugging body. The present invention provides a small plugging assembly for a converter station valve hall, and when the temperature of the converter station valve hall rises, the large plug will be deformed by the heat, resulting in a gap between the large plug and the small plug. By arranging the expansion unit in the vacant space provided on the small plugging body, the expansion unit will expand by the heat to fill the gap, thereby ensuring the fire resistance and sealing of the valve hall.

Description

Technical Field

[0001] The present invention relates to the technical field of valve hall plugging in a converter station, and in particular to a small plugging component for a valve hall in a converter station. Background Art

[0002] The valve hall of the converter station is an enclosed building where the converter valve is placed. During the installation of the converter transformer, the valve sleeve of the converter transformer needs to be extended into the valve hall and connected to the converter valve, that is, the valve sleeve of the converter transformer needs to be installed through the wall. The valve hall of the converter station needs to ensure full enclosure and micro-positive pressure, and meet fire protection requirements, so it is necessary to separate the converter valve and the converter transformer through a sealing structure. The sealing structure is generally divided into large sealing and small sealing. Large sealing refers to a sealing body with a larger area, including plates, keels, edging, etc. The position where the penetration (for example, the sleeve) is connected to the large sealing plate or the seam is filled and sealed is a small sealing. The main function of the small sealing is to seal the gap between the penetration and the large sealing to ensure that the gap has the same integrity and thermal insulation as the large sealing.

[0003] Existing small pluggings are usually densely filled with aluminum silicate needle-punched blankets. As an inorganic refractory material, aluminum silicate needle-punched blankets have the characteristics of high temperature resistance and low thermal conductivity, which can meet the needs of fire prevention and heat insulation.

[0004] However, the large seal will produce a certain deformation when heated, resulting in a gap between the large seal and the small seal. However, the elastic deformation of the aluminum silicate needle-punched blanket is not enough to fill the entire gap, thereby affecting the fire resistance and sealing of the valve hall, causing smoke and fire leakage in the valve hall. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the existing small plug cannot densely fill the gap between the large plug and the penetration piece, thereby affecting the fire resistance and sealing performance of the valve hall.

[0006] In order to solve the above technical problems, the present invention provides a small plugging assembly for a converter station valve hall, comprising:

[0007] A small plugging body is made of a heat-insulating material, and the small plugging body forms a ring around the gap to be plugged, and the ring formed by the small plugging body has at least one space for installing an expansion unit;

[0008] The expansion unit is a material that expands when heated, and is arranged in the annular space formed by the small blocking body.

[0009] The ring-shaped portion formed by the small blocking body has a plurality of spaces arranged at intervals, and the expansion units are multiple, and the multiple expansion units are respectively arranged in the ring-shaped spaces formed by the small blocking body.

[0010] The small blocking body is composed of a plurality of blocking units with the same shape, and the shape of the expansion unit is the same as that of the blocking unit.

[0011] The plurality of blocking units and the plurality of expansion units are alternately arranged in sequence.

[0012] The blocking unit and the expansion unit are both wedge-shaped, and the side of the blocking unit away from the sharp corner is arranged toward the fire-facing side, and the side of the expansion unit away from the sharp corner is arranged toward the fire-back side.

[0013] The angle of the sharp corner of the wedge is 10°-40°, and the width of the side of the wedge away from the sharp corner is 3cm-10cm.

[0014] The small blocking body is an aluminum silicate needle-punched blanket.

[0015] The expansion ratio of the expansion unit is 2 to 5 times.

[0016] The expansion unit is a silicone fireproof sealant.

[0017] The technical solution of the present invention has the following advantages:

[0018] 1. The present invention provides a small plugging assembly for a converter station valve hall, comprising a small plugging body and an expansion unit. The small plugging body is made of a heat-insulating material and forms a ring around the gap to be plugged. The ring formed by the small plugging body has at least one vacant space for installing the expansion unit. The expansion unit is made of a heat-expanding material and is disposed within the vacant space in the ring formed by the small plugging body. When the temperature in the converter station valve hall rises, the large plugging body will deform due to the heat, resulting in a gap between the large plugging body and the small plugging body. By disposing the expansion unit in the vacant space provided in the small plugging body, the expansion unit expands due to heat and fills the gap, thereby ensuring the fire resistance and sealing properties of the valve hall.

[0019] 2. The present invention provides a small plugging assembly for a converter station valve hall. The small plugging body forms a ring with multiple spaced-apart spaces. Multiple expansion units are positioned within the ring-shaped spaces. This ensures that thermal expansion of the expansion units fills the gaps, ensuring fire resistance and airtightness of the valve hall.

[0020] 3. The present invention provides a small plugging assembly for a converter station valve hall. The small plugging body is composed of a plurality of plugging units of the same shape. The shape of the expansion unit is the same as that of the plugging unit, which makes it easier to coordinate and install the plugging unit and the expansion unit.

[0021] 4. The present invention provides a small plugging assembly for a converter station valve hall, in which a plurality of the above-mentioned plugging units and a plurality of expansion units are alternately arranged in sequence. While ensuring the fire resistance and sealing of the valve hall, the plugging units and the expansion units are alternately arranged, which makes it easier to install the small plugging assembly, and the plugging units are subjected to more balanced force when the expansion units expand.

[0022] 5. The present invention provides a small plugging assembly for a converter station valve hall, wherein both the plugging unit and the expansion unit are wedge-shaped, and the side of the plugging unit facing away from the sharp corner is arranged toward the fire-facing side, while the side of the expansion unit facing away from the sharp corner is arranged toward the back-fire side. The plugging unit and the expansion unit are both arranged in a wedge shape to ensure that the expansion unit expands and squeezes the plugging unit in both the circumferential and radial directions of the penetration component to fill the gap tightly. Furthermore, the plugging unit is arranged facing the fire, while the expansion unit is arranged away from the fire, to ensure that the expansion unit is not overheated and does not fail due to overheating.

[0023] 6. The present invention provides a small plugging assembly for a converter station valve hall. The wedge-shaped sharp corner has an angle of 10°-40°, and the width of the side of the wedge away from the sharp corner is 3cm-10cm. A sharp corner that is too large can easily create a gap between the plugging unit and the expansion unit. A width of less than 3cm makes installation more complicated and inefficient. A width greater than 10cm can easily create a gap. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 A schematic structural diagram of a plugging unit of a small plugging assembly for a converter station valve hall provided by an embodiment of the present invention;

[0026] Figure 2 A schematic structural diagram of an expansion unit of a small plugging assembly for a converter station valve hall provided by an embodiment of the present invention;

[0027] Figure 3 A schematic diagram of the overall structure of a small plugging assembly for a converter station valve hall provided by an embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of the overall structure of the casing, wall and small plugging components of the converter station valve hall provided by an embodiment of the present invention.

[0029] Description of reference numerals:

[0030] 1. Sealing unit; 2. Expansion unit; 3. Wall; 4. Casing. DETAILED DESCRIPTION

[0031] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0034] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0035] like Figures 1 to 3 The illustrated embodiment of a small plugging assembly for a converter station valve hall comprises a plurality of plugging units 1 and a plurality of expansion units 2. The plugging units 1 are made of insulating material, while the expansion units 2 are made of thermally expandable material. The plugging units 1 are spaced apart around the gap to be plugged, forming a ring-shaped small plugging body. Spaces for the expansion units 2 are formed between adjacent plugging units 1, meaning the plugging units 1 and expansion units 2 are arranged alternately.

[0036] When the temperature of the valve hall of the converter station rises, the large seal will be deformed due to the heat, resulting in a gap between the large seal and the small seal. By alternating the sealing unit 1 and the expansion unit 2, the expansion unit 2 will expand due to the heat to fill the gap, ensuring the fire resistance and sealing of the valve hall. When the expansion unit 2 expands, the sealing unit 1 is subjected to a more balanced force.

[0037] like Figures 1 to 3 As shown, both the blocking unit 1 and the expansion unit 2 are wedge-shaped, and have the same shape and size. Setting both the blocking unit 1 and the expansion unit 2 in a wedge shape ensures that the expansion unit 2 expands and squeezes the blocking unit 1 in both the circumferential and axial directions of the penetration piece to fill the gap tightly.

[0038] like Figure 3 As shown, the side of the blocking unit 1 that is away from the sharp corner is placed toward the fire side, and the side of the expansion unit 2 that is away from the sharp corner is placed toward the fire side. Placing the blocking unit 1 toward the fire side and the expansion unit 2 away from the fire side ensures that the expansion unit 2 is not overheated and does not fail due to overheating.

[0039] In this embodiment, the angle of the wedge's sharp corner is 10°-40°, and the width of the side of the wedge away from the sharp corner is 3cm-10cm. If the sharp corner is too large, a gap may easily form between the blocking unit 1 and the expansion unit 2. If the width of the side of the wedge away from the sharp corner is less than 3cm, construction is cumbersome and inefficient. If the width is greater than 10cm, gaps are likely to form.

[0040] In this embodiment, the plugging unit 1 is an aluminum silicate needle-punched blanket, and the bulk density of the aluminum silicate needle-punched blanket is 128 kg / m 3 -160kg / m 3 , thermal conductivity is less than 0.153W / (m·k), operating temperature is not less than 1100℃, and tensile strength is not less than 21kPa.

[0041] In this embodiment, the expansion unit 2 is a silicone fireproof sealant with an expansion ratio of 2 to 5 times and a fire resistance limit of not less than 3 hours.

[0042] like Figure 4 As shown, the small plugging assembly provided in this embodiment is applied to a converter station valve hall. A converter valve is installed inside the valve hall, and a converter transformer is installed outside the valve hall. The converter valve and converter transformer are connected by a bushing 4, which extends through the wall 3 of the valve hall. The gap between the bushing 4 and the wall 3 is sealed using the small plugging assembly for the converter station valve hall. The width of the gap is typically 5 cm to 10 cm. Using the small plugging assembly to seal the gap between the bushing 4 and the wall 3 ensures the fire resistance and sealing properties of the converter station valve hall.

[0043] Plugging tests were conducted on eight groups of small plugging units and expansion units with different compositions and shapes. Aluminum silicate No. 3 to No. 6 specified in GB / T 16400 Aluminum silicate wool and its products was used. The specific materials of the plugging units and expansion units in each group are as follows:

[0044] Group 1:

[0045] The thermal conductivity of the aluminum silicate needle-punched blanket for the plugging unit is 0.149W / (m·k) and the bulk density is 180kg / m 3 The sharp angle of the wedge is 10°, the classification temperature is No. 3, and the width of the side of the wedge away from the sharp angle is 5 cm.

[0046] Expansion unit, wedge-shaped tip angle is 10°, fire resistance limit is 3h.

[0047] Group 2:

[0048] The thermal conductivity of the aluminum silicate needle-punched blanket for the plugging unit is 0.150W / (m·k) and the bulk density is 160kg / m 3 The sharp angle of the wedge is 20°, the classification temperature is No. 4, and the width of the side of the wedge away from the sharp angle is 3 cm.

[0049] Expansion unit, the wedge-shaped sharp angle is 20°, and the fire resistance limit is 3h.

[0050] Group 3:

[0051] The thermal conductivity of the aluminum silicate needle-punched blanket for the plugging unit is 0.152W / (m·k) and the bulk density is 128kg / m 3 The sharp angle of the wedge is 20°, the classification temperature is 5, and the width of the side of the wedge away from the sharp angle is 3 cm.

[0052] Expansion unit, the wedge-shaped sharp angle is 20°, and the fire resistance limit is 3h.

[0053] Group 4:

[0054] The thermal conductivity of the aluminum silicate needle-punched blanket for the plugging unit is 0.151W / (m·k) and the bulk density is 140kg / m 3 The sharp angle of the wedge is 30°, the classification temperature is No. 6, and the width of the side of the wedge away from the sharp angle is 8 cm.

[0055] Expansion unit, the wedge-shaped sharp angle is 30°, and the fire resistance limit is 3h.

[0056] Group 5:

[0057] The thermal conductivity of the aluminum silicate needle-punched blanket for the plugging unit is 0.151W / (m·k); the bulk density is 140kg / m 3 The sharp angle of the wedge is 30°, the classification temperature is No. 3, and the width of the side of the wedge away from the sharp angle is 8 cm.

[0058] Expansion unit, the wedge-shaped sharp angle is 20°, and the fire resistance limit is 2h.

[0059] Group 6:

[0060] The thermal conductivity of the aluminum silicate needle-punched blanket for the plugging unit is 0.151W / (m·k) and the bulk density is 140kg / m 3 The sharp angle of the wedge is 40°, the classification temperature is No. 4, and the width of the side of the wedge away from the sharp angle is 12 cm.

[0061] Expansion unit, wedge-shaped tip angle is 40°, fire resistance limit is 3h.

[0062] Group 7:

[0063] The thermal conductivity of the aluminum silicate needle-punched blanket for the plugging unit is 0.153W / (m·k) and the bulk density is 128kg / m 3 The sharp angle of the wedge is 50°, the classification temperature is 5, and the width of the side of the wedge away from the sharp angle is 10 cm.

[0064] Expansion unit, wedge-shaped tip angle is 50°, fire resistance limit is 3h.

[0065] Group 8:

[0066] The thermal conductivity of the aluminum silicate needle-punched blanket for the plugging unit is 0.160W / (m·k) and the bulk density is 96kg / m 3 The sharp angle of the wedge is 30°, the classification temperature is No. 6, and the width of the side of the wedge away from the sharp angle is 10 cm.

[0067] Expansion unit, the wedge-shaped sharp angle is 30°, and the fire resistance limit is 3h.

[0068] Each group was subjected to fire resistance test according to GB / T 9978.1. The test results are compared in the following table:

[0069]

[0070]

[0071] When using the small sealing assembly of this embodiment to seal the gap between the wall 3 and the bushing 4 of the valve hall of the converter station, the sealing unit 1 and the expansion unit 2 are alternately arranged in the gap in sequence, and the side of the sealing unit 1 away from the sharp corner is arranged toward the side of the converter transformer, and the side of the expansion unit 2 away from the sharp corner is arranged toward the side of the converter valve, and the gap is densely filled by multiple sealing units 1 and multiple expansion units 2.

[0072] In summary, by alternately arranging the blocking unit and the expansion unit, the expansion unit expands when heated to fill the gap, thereby ensuring the fire resistance and sealing of the valve hall, and the blocking unit is subjected to more balanced force when the expansion unit expands.

[0073] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A small plugging assembly for a converter station valve hall, characterized in that: include: The small blocking body is made of a heat-insulating material, and the small blocking body forms a ring around the gap to be blocked. The ring formed by the small blocking body has at least one space for installing an expansion unit (2). The small blocking body is formed by combining a plurality of blocking units (1) of the same shape. The expansion unit (2) is a material that expands when heated, and the expansion unit (2) is arranged in the annular space formed by the small blocking body; The plurality of blocking units (1) and the plurality of expansion units (2) are alternately arranged in sequence along the circumference of the small blocking body, and the shape of the expansion unit (2) is the same as that of the blocking unit (1); The blocking unit (1) and the expansion unit (2) are both wedge-shaped, and the side of the blocking unit (1) facing away from the sharp corner is arranged toward the fire-facing side, while the side of the expansion unit (2) facing away from the sharp corner is arranged toward the fire-repelling side.

2. The small plugging assembly for the converter station valve hall according to claim 1, characterized in that: The ring-shaped portion formed by the small blocking body has a plurality of spaces arranged at intervals, and the expansion units (2) are multiple, and the multiple expansion units (2) are respectively arranged in the spaces in the ring-shaped portion formed by the small blocking body.

3. The small plugging assembly for the converter station valve hall according to claim 1, characterized in that: The angle of the sharp corner of the wedge is 10°-40°, and the width of the side of the wedge away from the sharp corner is 3cm-10cm.

4. The small plugging assembly for the converter station valve hall according to claim 1 or 2, characterized in that: The small blocking body is an aluminum silicate needle-punched blanket.

5. The small plugging assembly for the converter station valve hall according to claim 1 or 2, characterized in that: The expansion ratio of the expansion unit (2) is 2 to 5 times.

6. The small plugging assembly for the converter station valve hall according to claim 5, characterized in that: The expansion unit (2) is a silicone fireproof sealant.

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