Support Component and Water Level Gauge Component

Abstract

The present disclosure provides a support assembly and a water level gauge assembly. The support assembly is used to support the water level gauge, and the water level gauge is connected to the head of the boiler steam drum. The support assembly includes: a base including a horizontal first support surface and a baffle arranged around the edge of the first support surface; and a support member. The bottom end of the support member is movably supported on the first support surface and is restricted within the activity space surrounded by the baffle by the baffle. The top end of the support member is used to support the water level gauge. This support assembly can enable the water level gauge to expand freely synchronously with the steam drum, so as to reduce the additional stress received by the water level gauge during the thermal expansion of the steam drum.

Description

Technical Field

[0001] The present disclosure relates to the technical field of boiler steam drums, and particularly to a support assembly and a water level gauge assembly. Background Art

[0002] In the related art, the steam drum is usually located at the front top of the boiler, spanning the furnace width direction, such as a subcritical, single-steam-drum, natural circulation, circulating fluidized bed boiler of model DG1025 / 17.4-Ⅱ18. The steam drum is suspended on the roof beam by two U-shaped hanging rods and functions as a water storage device for the boiler evaporation circuit. On both sides A and B of the steam drum head, there are 2 lead-out pipes each on the steam side and the water side, with a specification of φ28×4mm and a material of 20G. The lead-out pipes are welded to two two-color non-blind-zone water level gauges on both sides. These two water level gauges are in-situ water level gauges, which are used for monitoring and verifying the water level of the steam drum.

[0003] In the related art, a support assembly is provided at the bottom of the water level gauge to support the water level gauge. During the operation of the unit, the increase in the temperature of the working medium inside the steam drum causes the steam drum to thermally expand, and the water level gauges on both sides also generate horizontal displacement along with the expansion of the steam drum. This method is likely to cause additional stress on the welds in the water level gauge area, especially the welds at the joints with the steam and water side lead-out pipes, which may cause the welds of the steam and water side lead-out pipes of the in-situ water level gauge of the steam drum to be pulled apart due to excessive stress, resulting in the leakage of the steam-water system and the unplanned shutdown of the unit, threatening the safe operation of the unit. Summary of the Invention

[0004] The purpose of the present disclosure is to provide a support assembly and a water level gauge assembly. The support assembly can enable the water level gauge to expand freely synchronously with the steam drum, so as to reduce the additional stress on the water level gauge during the thermal expansion of the steam drum, and at least partially solve the above problems.

[0005] To achieve the above purpose, the first aspect of the present disclosure provides a support assembly for supporting a water level gauge. The water level gauge is connected to the head of the boiler steam drum. The support assembly includes: a base, including a horizontal first support surface and a baffle arranged around the edge of the first support surface; and a support member. The bottom end of the support member is movably supported on the first support surface and is restricted within the activity space surrounded by the baffle by the baffle. The top end of the support member is used to support the water level gauge.

[0006] Optionally, the support member includes a support body. The top end of the support body has a second support surface for supporting the water level gauge, and a plurality of contact members for sliding and / or rolling support on the first support surface are provided at the bottom end of the support body.

[0007] Optionally, a first mounting portion corresponding to the number of the contact members is provided at the bottom end of the support body; the contact member includes a connecting member detachably connected to the first mounting portion and a contact portion provided on the connecting member.

[0008] Optionally, the first mounting portion is configured as a first mounting groove, the connecting member includes a top surface and a bottom surface arranged oppositely, and a side surface located between the top surface and the bottom surface, the top surface abuts against the inner top surface of the first mounting groove, the side surface fits against the side wall surface of the first mounting groove, a second mounting groove is provided on the bottom surface, and the contact portion is configured as a sphere partially received in the second mounting groove.

[0009] Optionally, a first mounting portion corresponding to the number of the contact members is provided at the bottom end of the support body, the first mounting portion is configured as a first mounting groove, and the contact member is configured as a sphere partially received in the first mounting groove.

[0010] Optionally, the top end of the support body is higher than the top end of the baffle in the vertical direction.

[0011] Optionally, the bottom end of the support body is lower than the top end of the baffle in the vertical direction.

[0012] Optionally, the top end of the support body has a flanging extending horizontally outwards, the top surface of the flanging is coplanar with the second support surface, and the bottom surface of the flanging is higher than the top end of the baffle in the height direction.

[0013] Optionally, the base includes a horizontal support plate and a support frame connected to the bottom surface of the support plate, and the first support surface is formed on the top surface of the support plate.

[0014] A second aspect of the present disclosure provides a water level gauge assembly, including a water level gauge and the above-mentioned support assembly, the water level gauge is used to be connected to the head of the boiler steam drum, the water level gauge is placed on the support member, or the water level gauge is detachably connected to the support member.

[0015] Through the above technical solutions, that is, the support assembly provided by the present disclosure, the support member is used to support the water level gauge and is movably supported on the first support surface of the base. When the steam drum expands or contracts, since the water level gauge is supported on the support member, the water level gauge can expand freely synchronously with the steam drum, thereby reducing the additional stress on the water level gauge during the thermal expansion of the steam drum. In addition, by providing a baffle around the edge of the first support surface on the base, the support member displaces within the movable space surrounded by the baffle, which can prevent the support member from detaching from the base and causing the water level gauge to detach from the support assembly and be damaged, and further can ensure the safety and reliability performance of the water level gauge.

[0016] Other features and advantages of the present disclosure will be described in detail in the following detailed description section. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings are used to provide a further understanding of the present disclosure, and constitute a part of the specification. Together with the following detailed description, they are used to explain the present disclosure, but do not constitute a limitation to the present disclosure. In the drawings:

[0018] Figure 1 is a schematic structural diagram of a support assembly provided in an exemplary embodiment of the present disclosure;

[0019] Figure 2 is a schematic structural diagram of a base provided in an exemplary embodiment of the present disclosure;

[0020] Figure 3 is a front view of a base provided in an exemplary embodiment of the present disclosure;

[0021] Figure 4 is a schematic structural diagram of a support member provided in an exemplary embodiment of the present disclosure;

[0022] Figure 5 is a schematic structural diagram of a support body provided in an exemplary embodiment of the present disclosure;

[0023] Figure 6 is a schematic structural diagram of a connecting member provided in an exemplary embodiment of the present disclosure;

[0024] Figure 7 is a schematic structural diagram of the connecting member from another angle provided in an exemplary embodiment of the present disclosure;

[0025] Figure 8 is a schematic structural diagram of a contact part provided in an exemplary embodiment of the present disclosure.

[0026] DESCRIPTION OF THE REFERENCE NUMERALS

[0027] 1 - Base; 11 - First support surface; 12 - Baffle; 13 - Support plate; 14 - Support frame; 2 - Support member; 21 - Support body; 211 - Second support surface; 212 - First mounting portion; 213 - Flange; 22 - Contact member; 221 - Connecting member; 2211 - Top surface; 2212 - Side surface; 2213 - Second mounting groove; 222 - Contact part; 3 - Water level gauge. DETAILED DESCRIPTION

[0028] The following provides a detailed description of the specific embodiments of the present disclosure in conjunction with the drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure, and do not limit the present disclosure.

[0029] In the present disclosure, unless otherwise stated, the orientation terms such as "upper" and "lower" refer to the upper and lower relative to the structure or component itself, and "inner" and "outer" refer to the inner and outer relative to the contour of the structure or component itself. The terms such as "first" and "second" are used to distinguish one element from another, without sequence and importance. In addition, in the description with reference to the drawings, the same reference numerals in different drawings represent the same elements.

[0030] The inventors have found through research that during the operation of the above boiler, the temperature inside the steam drum rises, causing the steam drum to thermally expand. The local water level gauges on both sides also undergo horizontal displacement as the steam drum expands. According to actual measurement, under the BMCR operating condition of the unit, the displacement amounts of the local water level gauges on both sides A and B of the steam drum are respectively A: X = 80 mm, Y = 40 mm; B: X = 80 mm, Y = 35 mm. Among them, X represents the displacement amount along the length direction of the steam drum, and Y represents the displacement amount along the width direction of the steam drum, where both the length direction and the width direction of the steam drum are parallel to the horizontal plane.

[0031] Therefore, when the water level gauge undergoes the above displacements, it is likely to cause additional stress to the welds in the water level gauge area, especially the welds at the connection with the steam and water side outlet pipes, which will cause the welds of the steam and water side outlet pipes of the local water level gauge of the steam drum to be pulled apart due to excessive stress, resulting in leakage of the steam-water system and unplanned shutdown of the unit, threatening the safe operation of the unit.

[0032] Based on this, the first aspect of the present disclosure provides a support assembly for supporting the water level gauge, especially suitable for the local support of the two-color water level gauge of the steam drum in a subcritical natural circulation boiler. Refer to Figures 1 to 8 As shown, the support assembly includes: a base 1 and a support member 2. The base 1 includes a horizontal first support surface 11 and a baffle 12 arranged around the edge of the first support surface 11. The bottom end of the support member 2 is movably supported on the first support surface 11 and is restricted within the activity space enclosed by the baffle 12 through the baffle 12, and the top end of the support member 2 is used to support the water level gauge 3.

[0033] Through this arrangement, the support member 2 is used to support the water level gauge 3 and is movably supported on the first support surface 11 of the base 1. When the steam drum expands or contracts, since the water level gauge 3 is supported on the support member 2, the water level gauge 3 can expand freely synchronously with the steam drum, thereby reducing the additional stress suffered by the water level gauge 3 during the thermal expansion of the steam drum. In addition, by providing the baffle 12 around the edge of the first support surface 11 on the base 1, the support member 2 displaces within the activity space enclosed by the baffle 12, which can prevent the support member 2 from detaching from the base 1 and causing the water level gauge 3 to be damaged due to detachment from the support assembly, and further ensure the safe and reliable performance of the water level gauge 3.

[0034] In some embodiments, refer toFigure 1 As shown, the support member 2 includes a support body 21. The top end of the support body has a second support surface 211 for supporting the water level gauge 3, so as to increase the contact area with the water level gauge 3 and stably support the water level gauge 3.

[0035] In some specific embodiments, the water level gauge 3 can be directly placed on the second support surface 211. When the water level gauge 3 is a two-color water level gauge for a boiler steam drum, due to its own weight, when the water level gauge 3 displaces following the expansion of the steam drum, it can drive the support member 2 to displace synchronously, and can prevent the water level gauge 3 from detaching from the support member 2.

[0036] In other embodiments, the water level gauge 3 can also be detachably connected to the support body 21, such as by threaded fasteners, etc., to prevent the water level gauge 3 from detaching from the support member 2 and facilitate the replacement of the water level gauge 3 or the support member 2. Alternatively, the water level gauge 3 can also be welded to the support body 21. The present disclosure does not make specific limitations on this.

[0037] In some embodiments, referring to Figure 4 As shown, a plurality of contact members 22 are provided at the bottom end of the support body 21 for sliding and / or rolling support on the first support surface. In this way, the support body 21 is supported on the first support surface 11 through the plurality of contact members 22, which can reduce the contact area between the support body 21 and the first support surface 11, and further reduce the frictional resistance between the support body 21 and the first support surface 11, and further prevent additional stress from being caused to the welds on the steam and water side outlet pipes of the water level gauge 3 due to the large resistance during the displacement of the water level gauge 3.

[0038] In the first embodiment, referring to Figure 4 、 Figure 5 、 Figure 7 and Figure 8 As shown, a first installation portion 212 corresponding to the number of the contact members 22 is provided at the bottom end of the support body 21; the contact member 22 includes a connecting member 221 detachably connected to the first installation portion 212 and a contact portion 222 provided on the connecting member 221. In this way, the contact portion 222 is detachably connected to the first installation portion 212 through the connecting member 221. When the contact portion 222 is worn or damaged, for example, only the contact portion 222 or the contact portion 222 and the connecting member 221 need to be replaced, and there is no need to replace the support body 21, so as to reduce the maintenance cost.

[0039] In this first embodiment, the connecting member 221 and the contact portion 222 can be constructed in any suitable manner. For example, referring to Figures 5 to 8As shown, the first mounting portion 212 can be configured as a first mounting groove. The connecting member 221 includes a top surface 2211 and a bottom surface arranged opposite to each other, and a side surface 2212 located between the top surface 2211 and the bottom surface. The top surface 2211 abuts against the inner top surface of the first mounting groove, the side surface 2212 fits against the side wall surface of the first mounting groove, and a second mounting groove 2213 is provided on the bottom surface. The contact portion 222 is configured as a sphere partially received in the second mounting groove 2213.

[0040] In this way, the connecting member 221 can be fully or partially embedded in the first mounting groove. Among them, the side surface 2212 of the connecting member 221 can be in interference fit with the side wall surface of the first mounting groove to make the support member 2 more stable. Or, alternatively, the side surface of the connecting member 221 can be in sliding fit with the side wall surface of the first mounting groove to facilitate the replacement of the connecting member 221 at any time when the sphere wears.

[0041] In addition, the second mounting groove 2213 can be configured as a spherical groove adapted to the sphere, so that the sphere can be partially received in the second mounting groove 2213 and can rotate freely.

[0042] Furthermore, the contact portion 222 is configured as a sphere, which can achieve omnidirectional rotation to further reduce the frictional resistance between the support member 2 and the first support surface 11, and thus reduce the additional stress on the welds of the steam and water side lead-out pipes of the water level gauge 3. The sphere can be made of a metal material or a non-metallic wear-resistant material, etc., and the present disclosure does not make specific limitations on this.

[0043] In this first embodiment, the connecting member 221 and the contact portion 222 can also be configured in other ways. For example, the contact portion 222 can be configured as a roller, and the connecting member 221 is configured as a roller bracket, so that the roller can be mounted at the bottom end of the support body 21 through the roller bracket.

[0044] In the second embodiment, the bottom end of the support body 21 is provided with a first mounting portion 212 corresponding to the number of contact members 22, and the first mounting portion 212 is configured as a first mounting groove. Among them, the contact member 22 can be configured as a sphere partially received in the first mounting groove to simplify the structure of the support member 2. Or, alternatively, the contact member 22 can also be configured as a slider partially received in the first mounting groove, etc., and the present disclosure does not make specific limitations on this.

[0045] In some embodiments, refer to Figure 3As shown, the projected area of the bottom end of the water level gauge 3 in the vertical direction is larger than the projected area of the support main body 21 in the vertical direction. It can also be understood that the size of the bottom end of the water level gauge 3 is larger than the size of the support main body 21, and the top end of the support main body 21 is higher than the top end of the baffle 12 in the vertical direction. Through this arrangement, since the size of the bottom end of the water level gauge 3 is large and the top end of the support main body 21 is set to be higher than the top end of the baffle 12, it is possible to prevent the water level gauge 3 from touching the baffle 12. And thus, because the water level gauge 3 will not touch the baffle 12, the moving range of the water level gauge 3 is increased. Correspondingly, it is possible to achieve a larger moving range of the water level gauge 3 with a smaller size of the first support surface of the base 1, and further reduce the occupied space of the support assembly.

[0046] In some specific embodiments, referring to Figure 3 As shown, the bottom end of the support main body 21 is lower than the top end of the baffle 12 in the vertical direction. Through this arrangement, when the steam drum expands, it will drive the water level gauge 3 and the support main body 21 that supports the water level gauge 3 to move. Since the bottom end of the support main body 21 is connected with a contact member 22, the height of the entire support main body 21 will be raised. When the support main body 21 moves to the position where it abuts against the baffle 12, the height of the baffle 12 will stop the support main body 21 so that the support main body 21 always moves within the moving space to support the water level gauge 3.

[0047] In some specific embodiments, referring to Figure 1 、 Figure 4 、 Figure 5 As shown, the top end of the support main body 21 has a flanging 213 extending horizontally outwards. The top surface of the flanging 213 is coplanar with the second support surface 211, and the bottom surface of the flanging 213 is higher than the top end of the baffle 12 in the height direction. By providing the flanging 213 at the top end of the support main body 21, the area of the second support surface 211 is increased. The second support surface 211 can disperse the force exerted by the water level gauge 3 on the support main body 21, making the support effect more stable. In addition, the bottom surface of the flanging 213 is higher than the top end of the baffle 12 in the height direction, which can also prevent the flanging 213 from touching the baffle 12 and reducing the moving range of the water level gauge 3.

[0048] In some specific embodiments, referring to Figures 1 to 3As shown, the base 1 includes a horizontal support plate 13 and a support frame 14 connected to the bottom surface of the support plate 13. The first support surface 11 is formed on the top surface of the support plate 13. In this way, the support frame 14 can raise the height of the overall base 1 while providing an overall support for the support plate. In a specific embodiment of the present disclosure, the support frame 14 can be configured as an I-shaped steel structure with an I-shaped cross-section. The I-shaped steel has the characteristics of strong bending resistance, large load-bearing capacity, and light self-structure. In a specific example of the present disclosure, the number of support frames 14 is 4 and they are arranged in a rectangle below the support plate 13, which can be used to support a relatively heavy water level gauge 3.

[0049] In addition, the support plate 13 can be made of steel plate, which has the advantages of high strength, high toughness, and good heat resistance.

[0050] According to a second aspect of the present disclosure, a water level gauge assembly is provided, which includes a water level gauge 3 and the above-mentioned support assembly. The water level gauge 3 is used to be connected to the head of the boiler steam drum. Among them, the water level gauge 3 can be, for example, a two-color water level gauge. In addition, this water level gauge assembly has all the beneficial effects of the above-mentioned support assembly, which will not be elaborated herein again.

[0051] The water level gauge 3 can be placed on the support member 2. Due to the weight of the water level gauge 3 itself, when the water level gauge 3 displaces following the expansion of the steam drum, it can drive the support member 2 to displace synchronously, and the water level gauge 3 can be prevented from detaching from the support member 2. Or, the water level gauge 3 is detachably connected to the support member 2 to avoid the separation of the water level gauge 3 from the support member 2 and facilitate the replacement of the water level gauge 3 or the support member 2.

[0052] The preferred embodiments of the present disclosure have been described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0053] In addition, it should be noted that among the various specific technical features described in the above specific embodiments, they can be combined in any suitable way without contradiction. To avoid unnecessary repetition, the present disclosure will not separately describe various possible combination methods.

[0054] In addition, any combination can be made between various different embodiments of the present disclosure as long as it does not violate the idea of the present disclosure, and it should equally be regarded as the content disclosed by the present disclosure.

Claims

1. A support component, characterized in that, For supporting a water level gauge, the water level gauge is connected to the head of a boiler steam drum, and the support assembly includes: A base including a horizontal first support surface and a baffle arranged around the edge of the first support surface; and A support member, the bottom end of the support member is movably supported on the first support surface and is restricted within the activity space surrounded by the baffle by the baffle, and the top end of the support member is used to support the water level gauge; The support member includes a support main body, the top end of the support main body has a second support surface for supporting the water level gauge, and a plurality of contact members for sliding and / or rolling on the first support surface are provided at the bottom end of the support main body; A first installation portion corresponding to the number of the contact members is provided at the bottom end of the support main body; The contact member includes a connecting member detachably connected to the first installation portion and a contact portion provided on the connecting member; The first installation portion is configured as a first installation groove, the connecting member includes a top surface and a bottom surface arranged opposite to each other, and a side surface located between the top surface and the bottom surface, the top surface abuts against the inner top surface of the first installation groove, the side surface fits against the side wall surface of the first installation groove, a second installation groove is provided on the bottom surface, and the contact portion is configured as a sphere partially received in the second installation groove; The base includes a horizontal support plate and a support frame connected to the bottom surface of the support plate, and the first support surface is formed on the top surface of the support plate.

2. The support assembly according to claim 1, wherein The top end of the support main body is higher than the top end of the baffle in the vertical direction.

3. The support assembly according to claim 1 or 2, characterized in that, The bottom end of the support main body is lower than the top end of the baffle in the vertical direction.

4. The support assembly according to claim 1 or 2, characterized in that, The top end of the support main body has a flanging extending horizontally outwards, the top surface of the flanging is coplanar with the second support surface, and the bottom surface of the flanging is higher than the top end of the baffle in the height direction.

5. A water level gauge assembly, characterized in that, Including a water level gauge and the support assembly according to any one of claims 1-4, the water level gauge is used to be connected to the head of a boiler steam drum, the water level gauge is placed on the support member, or the water level gauge is detachably connected to the support member.

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