Bottom valve plate double-end anti-deviation guide device

Abstract

The utility model relates to a bottom valve plate double-end deviation-preventing guiding device which comprises an upper deviation-preventing guiding structure and a lower deviation-preventing guiding structure. The upper anti-deviation guide structure comprises an upper guide rod, an upper guide ring and an upper guide ring bracket; the upper guide rod is vertically and fixedly connected with the center of the upper end of the bottom valve plate; the upper guide ring support is fixedly connected with the inner wall of the valve seat, and an upper guide ring is fixed to the center of the upper guide ring support and matched with the upper guide rod in an up-down penetrating and guiding mode. The lower anti-deviation guide structure comprises a lower guide rod, a lower guide ring and a lower guide ring bracket; the lower guide rod and the upper guide rod are coaxially arranged, and the lower guide rod is vertically and fixedly connected with the center of the lower end of the bottom valve plate; the lower guide ring support is fixedly connected with the inner wall of the upper edge of a bottom valve filter cartridge connected to the lower end of the valve seat, and a lower guide ring is fixed to the center of the lower guide ring support and matched with a lower guide rod in a vertically penetrating and guiding mode. And components of the upper anti-deviation guide structure and the lower anti-deviation guide structure are made of stainless steel materials. The sealing performance of the sealing surfaces of the valve plate and the valve seat is well guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of power plant equipment, and relates to a whitening pump, in particular to a double-end anti-deviation guide device for a bottom valve plate of a whitening pump. Background Art

[0002] During the power generation process of the power plant, the exhaust gas temperature is cooled by the water circulation refrigeration system. Among them, the whitening pump is the power source in the water circulation refrigeration system. The start and stop of the whitening pump is affected by the weather and the exhaust gas temperature. It needs to be started and stopped frequently to ensure the exhaust temperature of the flue gas. During the frequent start and stop of the whitening pump, the bottom valve plate is frequently lifted and lowered. In order to ensure that the bottom valve plate can accurately fall on the valve seat sealing surface to achieve sealing, the existing bottom valve plate anti-bias guide structure adopts a single guide structure located at the upper end. Specifically, a guide rod is fixedly welded at the center of the upper end of the bottom valve plate. The guide rod can be slidably installed in the guide ring. Multiple transverse arms are welded on the outside of the guide ring in the circumferential direction. The outer ends of the multiple transverse arms are fixedly welded to the inner wall of the valve seat. With the above-mentioned single anti-bias guide structure, during the start-up and shutdown and normal operation of the whitening pump, due to the rust and friction of the guide rod and the positioning ring, the matching clearance between the guide rod and the positioning ring will gradually increase over time, causing the guide rod to deflect when the bottom valve plate is raised and lowered, and then causing the bottom valve plate to fail to seal with the valve seat after it falls back. When the bottom valve plate and the valve seat cannot be sealed, it will be difficult to inject water into the whitening pump inlet during the next startup process, causing the whitening pump to fail to start, which will have an adverse impact on normal power generation. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model proposes a double-end anti-deflection guide device for a bottom valve plate, which can effectively prevent the valve plate from deflecting during the lifting and lowering process for a long time and has good anti-corrosion and anti-rust properties, thereby better achieving the sealing between the valve plate and the valve seat sealing surface.

[0004] The above-mentioned purpose of the utility model is achieved through the following technical solutions:

[0005] A double-end anti-deflection guide device for a bottom valve plate, comprising an upper anti-deflection guide structure and a lower anti-deflection guide structure;

[0006] The upper anti-deflection guide structure includes an upper guide rod, an upper guide ring and an upper guide ring bracket; the upper guide rod is vertically fixedly connected to the center of the upper end of the bottom valve plate; the upper guide ring bracket is fixedly connected to the inner wall of the valve seat, and the upper guide ring is fixed at the center thereof, and the upper guide ring and the upper guide rod form a guide fit along the up and down direction;

[0007] The lower anti-deflection guide structure includes a lower guide rod, a lower guide ring and a lower guide ring bracket; the lower guide rod is coaxially arranged with the upper guide rod, and the lower guide rod is vertically fixedly connected to the center of the lower end of the bottom valve plate; the lower guide ring bracket is fixedly connected to the inner wall of the upper edge of the bottom valve filter cartridge connected to the lower end of the valve seat, and the lower guide ring is fixed at the center thereof, and the lower guide ring and the lower guide rod form a guide fit along the up and down directions;

[0008] The components of the upper anti-deflection guide structure and the lower anti-deflection guide structure are all made of stainless steel.

[0009] Moreover, a flange is welded at the lower end of the upper guide rod, and the flange is fixed to the upper end of the bottom valve plate by screws and anti-loosening washers, so that the upper guide rod and the bottom valve plate form a detachable fixed connection; the upper guide ring and the upper guide ring bracket adopt a split detachable fixed connection, and the upper guide ring bracket is composed of an upper guide ring mounting sleeve and a plurality of radial support arms welded to the outer surface of the upper guide ring mounting sleeve and evenly distributed along the circumferential direction, and the outer ends of the plurality of radial support arms are welded to the inner wall of the valve seat; the upper guide ring adopts a flange ring, the lower part of which is embedded in the upper guide ring mounting sleeve, and the upper part is fixedly connected to the upper end of the upper guide ring mounting sleeve by screws and anti-loosening washers.

[0010] Moreover, a flange is welded at the upper end of the lower guide rod, and the flange is fixedly connected to the lower end of the bottom valve plate by screws and anti-loosening washers; the lower guide ring and the lower guide ring bracket are fixedly connected in a split and detachable manner, and the lower guide ring bracket is composed of a lower guide ring mounting sleeve and a plurality of radial support arms welded to the outer surface of the lower guide ring mounting sleeve and evenly distributed in the circumferential direction, and the outer ends of the plurality of radial support arms are welded to the inner wall of the upper edge of the bottom valve filter cartridge; the lower guide ring adopts a flange ring, the lower part of which is embedded in the lower guide ring mounting sleeve, and the upper part is fixedly connected to the upper end of the lower guide ring mounting sleeve by screws and anti-loosening washers.

[0011] Moreover, an upper positioning circular groove consistent with the outer diameter of the flange of the upper guide rod is arranged at the center of the upper end of the valve plate of the bottom valve, and the lower end of the flange of the upper guide rod is embedded in the upper positioning circular groove; a lower positioning circular groove consistent with the outer diameter of the flange of the lower guide rod is arranged at the center of the lower end of the valve plate of the bottom valve, and the upper end of the flange of the lower guide rod is embedded in the lower positioning circular groove.

[0012] Moreover, an anti-deflection guide head is arranged at the lower end of the lower guide rod, and the anti-deflection guide head is a conical head with a larger upper part and a smaller lower part, and the lower end edge of the conical head adopts a rounded structure; an anti-deflection guide seat is arranged at the bottom center of the bottom valve filter cartridge, and the anti-deflection guide seat adopts a flange sleeve structure, and the lower end flange part is welded and connected to the bottom of the bottom valve filter cartridge, and the center hole adopts a conical hole that matches the shape of the anti-deflection guide head, and during the falling process of the bottom valve plate, the anti-deflection guide head and the conical hole form a guiding fit.

[0013] The advantages and positive effects of the utility model are:

[0014] 1. In addition to the existing single anti-deviation guide structure, the utility model arranges an upper anti-deviation guide structure and a lower anti-deviation guide structure at the upper and lower parts of the bottom valve plate respectively. The upper and lower anti-deviation guide structures cooperate to play a double-end anti-deviation guide role, thereby enhancing the anti-deviation guide performance of the bottom valve plate and effectively preventing the valve plate from swinging during the lifting and lowering process for a relatively long time.

[0015] 2. The utility model, on the basis of adopting double-end anti-deviation guide, further arranges a conical guide structure consisting of an anti-deviation guide head and an anti-deviation guide seat, which plays a role in strengthening the anti-deviation guide.

[0016] 3. The anti-deviation guide components of the utility model are made of stainless steel, which has the advantages of being rust-proof and anti-corrosion, and can avoid the adverse effects of rust and corrosion on the anti-deviation guide.

[0017] 4. In the utility model, the guide ring and the guide ring bracket are detachably connected, and the guide rod and the bottom valve plate are detachably connected, which can facilitate replacement and maintenance after long-term use and wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the first embodiment of the utility model (welding connection);

[0019] Figure 2 It is a structural schematic diagram of the second embodiment of the utility model (split connection). DETAILED DESCRIPTION

[0020] The structure of the utility model is further described below with reference to the accompanying drawings and through embodiments. It should be noted that the embodiments are descriptive rather than restrictive.

[0021] A double-end anti-deflection guide device for the bottom valve disc, see Figure 1 and Figure 2 The invention point is: it includes an upper anti-deflection guide structure and a lower anti-deflection guide structure.

[0022] The upper anti-bias guide structure includes an upper guide rod 4, an upper guide ring 3 and an upper guide ring bracket 2. The upper guide rod is vertically fixedly connected to the center of the upper end of the bottom valve plate, and the connection method that can be adopted is welding or detachable connection. In the present utility model, it is preferred to adopt a detachable connection method, and a flange is welded at the lower end of the upper guide rod, and the flange is fixedly connected to the upper end of the bottom valve plate by screws and anti-loosening washers. In order to facilitate the alignment of the center position of the upper guide rod and the bottom valve plate, an upper positioning circular groove consistent with the outer diameter of the flange can be set at the center of the upper end of the bottom valve plate, and the lower end of the flange is embedded in the upper positioning circular groove. The upper guide ring bracket is fixedly connected to the inner wall of the valve seat, and the upper guide ring is fixed at the center thereof. The upper guide ring and the upper guide rod form a guide fit along the up and down directions. The upper guide ring and the upper guide ring bracket can adopt an integral welded forming structure, or a split combined structure. In the present invention, the upper guide ring and the upper guide ring bracket preferably adopt a two-part structure. Specifically, the upper guide ring bracket is composed of an upper guide ring mounting sleeve and a plurality of radial arms welded to the outer surface of the upper guide ring mounting sleeve and uniformly arranged along the circumferential direction. The outer ends of the plurality of radial arms are welded to the inner wall of the valve seat 1. The upper guide ring adopts a flange ring, the lower part 4.1 of which is embedded in the upper guide ring mounting sleeve, and the upper part is fixedly connected to the upper end of the upper guide ring mounting sleeve by screws and anti-loosening washers.

[0023] The lower anti-bias guide structure includes a lower guide rod 7, a lower guide ring 8 and a lower guide ring bracket 9. The lower guide rod is coaxially arranged with the upper guide rod, and the lower guide rod is vertically fixedly connected to the center of the lower end of the bottom valve plate. The connection method that can be adopted is welding or detachable connection. In the present utility model, it is preferred to adopt a detachable connection method, and a flange is welded at the upper end of the lower guide rod, and the flange is fixedly connected to the lower end of the bottom valve plate through screws and anti-loosening washers. In order to facilitate the alignment of the center position of the lower guide rod and the bottom valve plate, a lower positioning circular groove consistent with the outer diameter of the flange can be set at the center of the lower end of the bottom valve plate, and the lower end of the flange is embedded in the lower positioning circular groove. The lower guide ring bracket is fixedly connected to the inner wall of the upper edge of the bottom valve filter cylinder 6 connected to the lower end of the valve seat, and the lower guide ring is fixed at the center, and the lower guide ring forms a guide fit with the lower guide rod. The lower guide ring and the lower guide ring bracket can adopt an integrated welding forming structure, or a split combined structure. In the present invention, the lower guide ring and the lower guide ring bracket preferably adopt a two-part structure. Specifically, the lower guide ring bracket is composed of a lower guide ring mounting sleeve and a plurality of radial arms welded to the outer surface of the lower guide ring mounting sleeve and evenly distributed along the circumferential direction. The outer ends of the plurality of radial arms are welded to the inner wall of the inner wall of the upper edge of the bottom valve filter cartridge. The lower guide ring adopts a flange ring, the lower part of which is embedded in the lower guide ring mounting sleeve, and the upper part 7.1 is fixedly connected to the upper end of the lower guide ring mounting sleeve by screws and anti-loosening washers.

[0024] In order to further improve the anti-deviation guiding performance, in the utility model, an anti-deviation guiding head 10 is provided at the lower end of the lower guiding rod. The anti-deviation guiding head adopts a conical head with a larger upper part and a smaller lower part, and the lower edge of the conical head adopts a rounded structure. In coordination with the anti-deviation guiding head, an anti-deviation guiding seat 11 is provided at the bottom center of the bottom valve filter cartridge. The anti-deviation guiding seat adopts a flange sleeve structure, and its lower end flange is welded and connected to the bottom of the bottom valve filter cartridge, and its center hole adopts a conical hole matching the shape of the anti-deviation guiding head. The coordination of the anti-deviation guiding head and the anti-deviation guiding seat constitutes a strengthened anti-deviation guiding structure.

[0025] By adopting this enhanced anti-bias guide structure, when the bottom valve plate 5 falls back to the valve seat sealing surface, the centering adjustment of the bottom valve plate and the valve seat sealing surface is achieved through the cooperation of the two conical guide surfaces, thereby ensuring the sealing of the bottom valve plate in contact with the valve seat sealing surface after the bottom valve plate falls back.

[0026] The upper guide rod, upper guide ring, upper guide ring bracket, lower guide rod, lower guide ring, lower guide ring bracket, anti-deviation guide head and anti-deviation guide seat are all made of stainless steel and have good anti-rust and anti-corrosion properties.

[0027] Although the embodiments and drawings of the present invention are disclosed for illustrative purposes, those skilled in the art will appreciate that various substitutions, changes and modifications are possible without departing from the spirit of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. A double-end anti-deflection guide device for a bottom valve plate, characterized in that: It includes an upper anti-deflection guide structure and a lower anti-deflection guide structure; The upper anti-deflection guide structure includes an upper guide rod, an upper guide ring and an upper guide ring bracket; the upper guide rod is vertically fixedly connected to the center of the upper end of the bottom valve plate; the upper guide ring bracket is fixedly connected to the inner wall of the valve seat, and the upper guide ring is fixed at the center thereof, and the upper guide ring and the upper guide rod form a guide fit along the up and down direction; The lower anti-deflection guide structure includes a lower guide rod, a lower guide ring and a lower guide ring bracket; the lower guide rod is coaxially arranged with the upper guide rod, and the lower guide rod is vertically fixedly connected to the center of the lower end of the bottom valve plate; the lower guide ring bracket is fixedly connected to the inner wall of the upper edge of the bottom valve filter cartridge connected to the lower end of the valve seat, and the lower guide ring is fixed at the center thereof, and the lower guide ring and the lower guide rod form a guide fit along the up and down directions; The components of the upper anti-deflection guide structure and the lower anti-deflection guide structure are all made of stainless steel.

2. The double-end anti-deflection guide device for the bottom valve plate according to claim 1, characterized in that: A flange is welded to the lower end of the upper guide rod, and the flange is fixed to the upper end of the bottom valve plate by screws and anti-loosening washers, so that the upper guide rod and the bottom valve plate form a detachable fixed connection; the upper guide ring and the upper guide ring bracket are connected in a split detachable fixed manner, and the upper guide ring bracket is composed of an upper guide ring mounting sleeve and a plurality of radial support arms welded to the outer surface of the upper guide ring mounting sleeve and evenly distributed in the circumferential direction, and the outer ends of the plurality of radial support arms are welded to the inner wall of the valve seat; the upper guide ring adopts a flange ring, the lower part of which is embedded in the upper guide ring mounting sleeve, and the upper part is fixedly connected to the upper end of the upper guide ring mounting sleeve by screws and anti-loosening washers.

3. The double-end anti-deflection guide device for the bottom valve plate according to claim 2, characterized in that: A flange is welded to the upper end of the lower guide rod, and the flange is fixedly connected to the lower end of the bottom valve plate by screws and anti-loosening washers; the lower guide ring and the lower guide ring bracket are fixedly connected in a split and detachable manner, and the lower guide ring bracket is composed of a lower guide ring mounting sleeve and a plurality of radial support arms welded to the outer surface of the lower guide ring mounting sleeve and evenly distributed in the circumferential direction, and the outer ends of the plurality of radial support arms are welded to the inner wall of the upper edge of the bottom valve filter cartridge; the lower guide ring adopts a flange ring, the lower part of which is embedded in the lower guide ring mounting sleeve, and the upper part is fixedly connected to the upper end of the lower guide ring mounting sleeve by screws and anti-loosening washers.

4. The double-end anti-deflection guide device for the bottom valve plate according to claim 3, characterized in that: An upper positioning circular groove consistent with the outer diameter of the flange of the upper guide rod is arranged at the center of the upper end of the valve plate of the bottom valve, and the lower end of the flange of the upper guide rod is embedded in the upper positioning circular groove; a lower positioning circular groove consistent with the outer diameter of the flange of the lower guide rod is arranged at the center of the lower end of the valve plate of the bottom valve, and the upper end of the flange of the lower guide rod is embedded in the lower positioning circular groove.

5. The double-end anti-deflection guide device for the bottom valve plate according to claim 1, characterized in that: An anti-deflection guide head is arranged at the lower end of the lower guide rod. The anti-deflection guide head is a conical head with a larger upper part and a smaller lower part, and the lower end edge of the conical head adopts a rounded structure; an anti-deflection guide seat is arranged at the bottom center of the bottom valve filter cartridge, and the anti-deflection guide seat adopts a flange sleeve structure, and the lower end flange portion is welded and connected to the bottom of the bottom valve filter cartridge, and the center hole adopts a conical hole that matches the shape of the anti-deflection guide head. During the falling back process of the bottom valve plate, the anti-deflection guide head and the conical hole form a guiding fit.

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