Waste heat recycling device for thermal power plant

Abstract

The utility model discloses a waste heat recycling device of a thermal power plant, which relates to the technical field of waste heat recycling of the thermal power plant and comprises a waste heat exchanger shell, an access hole is formed in the front surface of the waste heat exchanger shell, an access door covers the front surface of the access hole, and connecting blocks are symmetrically distributed at two ends of the access door. And connecting grooves are formed in the connecting blocks correspondingly, and moving blocks are inserted into the connecting grooves correspondingly. Through the arrangement of the connecting block and the limiting block, in the using process, through the mutual cooperation of the connecting block and the limiting block, a worker can conveniently and rapidly complete the disassembly and assembly work of the access door, so that the working efficiency of the worker in the overhauling process can be effectively improved, and through the arrangement of the fixing plate and the positioning rod, in the using process, the work efficiency of the worker is effectively improved. And through mutual cooperation of the fixing plate and the positioning rod, a worker can fix the access door on the front face of the device in advance when the access door is installed, and therefore the convenience of follow-up installation of the access door can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat recovery in thermal power plants, in particular to a waste heat recovery and utilization device in thermal power plants. Background Art

[0002] Thermal power plants generate a large amount of waste heat during the power generation process. If this waste heat is not recycled, it will be wasted. Through waste heat recovery, this part of energy can be reused to improve the overall energy utilization efficiency. There are many devices for waste heat recovery, and waste heat exchanger is one of them. It can realize the recovery and utilization of waste heat by exchanging heat between two fluids of different temperatures on the heat exchange surface.

[0003] At present, when the existing waste heat exchanger is in use, in order to facilitate daily inspections of the interior of the heat exchanger and check whether there is dust, dirt, corrosion, etc. on the heat exchange surface so as to clean it in time to ensure heat exchange efficiency, an inspection door is set on the front of the heat exchanger. The inspection door is connected by multiple sets of bolts. Therefore, during the inspection process, the staff needs to use auxiliary tools and rotate multiple sets of bolts to complete the inspection, which makes the overall inspection efficiency relatively low. For this reason, we propose a waste heat recovery and utilization device for thermal power plants to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a waste heat recovery and utilization device for a thermal power plant.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A waste heat recovery and utilization device for a thermal power plant includes a waste heat exchanger shell, an inspection port is provided on the front of the waste heat exchanger shell, and the front of the inspection port is covered with an inspection door, connecting blocks are symmetrically distributed at both ends of the inspection door, and connecting grooves are provided inside the connecting blocks, movable blocks are respectively inserted into the interiors of the connecting grooves, and the sides of the movable blocks close to each other are connected to limit blocks, positioning grooves adapted to the limit blocks are provided on the sides of the inspection door, a bidirectional screw is provided above the inspection door, and the two ends of the bidirectional screw respectively pass through the connecting blocks and are connected to the inner wall of the connecting groove through bearings, and a threaded groove adapted to the bidirectional screw is provided inside the movable block.

[0007] Preferably, a slot is provided on the front of the inspection door, and a handle is connected to the inner wall of the slot.

[0008] Preferably, a rotating plate is connected to the center of the bidirectional screw, and the rotating plates are distributed on the outer surface of the bidirectional screw in an arc-shaped array structure.

[0009] Preferably, four groups of fixing plates are symmetrically connected to the inner wall of the inspection port, and positioning rods are inserted into the interior of the four groups of fixing plates, and the front of the positioning rods is connected to the back of the inspection door.

[0010] Preferably, the outer wall of the positioning rod is covered with a rubber sleeve, and the outer surface of the rubber sleeve is connected to the inner wall of the reserved groove opened inside the fixing plate.

[0011] Preferably, the upper and lower ends of the connection block are symmetrically connected with mounting plates, and the interior of the mounting plates are connected to the front side of the waste heat exchanger shell through bolts.

[0012] Preferably, guide rods are inserted into the bottom ends of the two groups of connecting blocks, and guide grooves adapted to the guide rods are opened inside the moving blocks.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. The device is provided with a connecting block and a limit block. During use, the connecting block and the limit block cooperate with each other, which can facilitate the staff to quickly complete the disassembly and assembly of the inspection door, thereby effectively improving the work efficiency of the staff during the inspection process.

[0015] 2. The device is provided with a fixing plate and a positioning rod. During use, through the mutual cooperation of the fixing plate and the positioning rod, the staff can fix it on the front of the device in advance when installing the inspection door, thereby effectively improving the convenience of subsequent installation of the inspection door. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of a waste heat recovery and utilization device for a thermal power plant proposed by the utility model;

[0017] Figure 2 for Figure 1 A three-dimensional schematic diagram of the fixed plate and bidirectional screw structure;

[0018] Figure 3 for Figure 1 Schematic diagram of the three-dimensional cross-section of the limit block and slot structure;

[0019] Figure 4 for Figure 1 Schematic diagram of the three-dimensional cross-section of the positioning rod and rubber sleeve structure.

[0020] In the figure: 1. Waste heat exchanger housing; 2. Inspection door; 3. Connecting block; 4. Connecting groove; 5. Moving block; 6. Limiting block; 7. Bidirectional screw; 8. Rotating plate; 9. Guide rod; 10. Mounting plate; 11. Slot; 12. Handle; 13. Fixing plate; 14. Positioning rod; 15. Rubber sleeve. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] Reference Figure 1-4 A waste heat recovery and utilization device for a thermal power plant includes a waste heat exchanger shell 1, an inspection port is provided on the front of the waste heat exchanger shell 1, and an inspection door 2 is provided on the front of the inspection port. Connecting blocks 3 are symmetrically distributed at both ends of the inspection door 2, and connecting grooves 4 are provided inside the connecting blocks 3. Moving blocks 5 are respectively inserted into the connecting grooves 4, and the sides of the moving blocks 5 close to each other are connected to limit blocks 6. A positioning groove is provided on the side of the inspection door 2 to match the limit blocks 6. A bidirectional screw 7 is provided above the inspection door 2, and the two ends of the bidirectional screw 7 respectively penetrate to The connecting block 3 is connected to the inner wall of the connecting groove 4 through a bearing. Two sets of external threads in opposite directions are provided at the left and right ends of the bidirectional screw 7. A thread groove adapted to the bidirectional screw 7 is provided inside the moving block 5. Therefore, when the bidirectional screw 7 rotates, the two sets of moving blocks 5 are threadedly matched with the bidirectional screw 7, so that the two sets of moving blocks 5 are forced to move closer to or away from each other, so that the two sets of limit blocks 6 are inserted into the positioning grooves provided inside the inspection door 2, or are pulled out from the positioning grooves inside the inspection door 2, so as to realize rapid disassembly and assembly of the inspection door 2.

[0023] Further, refer to Figure 1 and Figure 3 It can be seen that a slot 11 is provided on the front of the inspection door 2, and a handle 12 is connected to the inner wall of the slot 11. During use, the slot 11 and the handle 12 cooperate with each other to facilitate the staff to pull the inspection door 2 conveniently.

[0024] Further, refer to Figure 3 It can be seen that a rotating plate 8 is connected to the center position of the bidirectional screw 7, and the rotating plate 8 is distributed in an arc-shaped array structure on the outer surface of the bidirectional screw 7. When in use, the setting of multiple groups of rotating plates 8 can effectively improve the convenience of the staff in rotating the bidirectional screw 7.

[0025] Further, refer to Figure 4 It can be seen that four groups of fixing plates 13 are symmetrically connected to the inner wall of the inspection port, and positioning rods 14 are inserted into the interior of the four groups of fixing plates 13. The front of the positioning rods 14 is connected to the back of the inspection door 2. When in use, the inspection door 2 covering the front of the inspection port can be preliminarily positioned by the mutual cooperation of the fixing plates 13 and the positioning rods 14.

[0026] Further, refer to Figure 4It can be seen that the outer wall of the positioning rod 14 is provided with a rubber sleeve 15, and the outer surface of the rubber sleeve 15 is connected to the inner wall of the reserved groove opened inside the fixing plate 13. Through the setting of the rubber sleeve 15, the tightness of the positioning rod 14 when inserted into the fixing plate 13 can be further ensured.

[0027] Further, refer to Figure 3 and Figure 4 It can be seen that the upper and lower ends of the connecting block 3 are symmetrically connected with the mounting plates 10, and the interior of the mounting plates 10 are connected to the front of the waste heat exchanger housing 1 through bolts. When in use, the two sets of connecting blocks 3 can be disassembled and assembled by the mutual cooperation of the mounting plates 10 and the bolts.

[0028] Further, refer to Figure 2 and Figure 3 It can be seen that a guide rod 9 is inserted into the bottom end of the two groups of connecting blocks 3, and a guide groove adapted to the guide rod 9 is opened inside the moving block 5. During use, the stability of the two groups of moving blocks 5 during lateral movement can be further ensured by the mutual cooperation between the guide rod 9 and the guide groove.

[0029] Working principle: When the utility model is in use, the staff can first install the device at the designated position. After using it for a period of time, when the staff needs to repair the device, the staff can first rotate the rotating plate 8, thereby driving the bidirectional screw 7 to rotate at the same time. At this time, the left and right sides of the bidirectional screw 7 are able to be threadedly matched with the two groups of moving blocks 5, so that the two groups of moving blocks 5 and the limit block 6 are forced to slide inside the connecting groove 4, so that the limit block 6 can be pulled out from the positioning groove opened inside the inspection door 2 to release the limit on the inspection door 2, and then the staff can The staff can manually pull the handle 12, thereby causing the inspection door 2 to be subjected to tension, so that the positioning rod 14 connected to the back of the inspection door 2 is pulled out from the inside of the fixing plate 13. At this time, the staff can inspect the inside of the waste heat exchanger shell 1 through the inspection port. After the inspection is completed, the staff can cover the inspection door 2 on the front of the waste heat exchanger shell 1 again, and then rotate the rotating plate 8 in the opposite direction, so that the limit block 6 can be embedded in the positioning groove provided on the side wall of the inspection door 2 to realize the re-installation of the inspection door 2. The above is the entire working principle of the present utility model.

[0030] In the present invention, the installation method, connection method or setting method of all the components mentioned above are common mechanical methods, and the specific structures, models and coefficient indicators of all its components are its own technology. As long as it can achieve its beneficial effects, it can be implemented, so it will not be elaborated on.

[0031] The above embodiments are preferred implementation methods of the present invention, but the implementation methods of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be considered as equivalent replacement methods and are included in the scope of protection of the present invention.

[0032] In the present utility model, unless otherwise specified, the directional words contained in the terms "up, down, left, right, front, back, inside, outside, vertical, horizontal" only represent the directions of the terms in normal use, or are common names understood by those skilled in the art, and should not be regarded as limitations on the terms. At the same time, number series nouns such as "first", "second" and "third" do not represent specific quantities and orders, but are merely used to distinguish names. Moreover, the terms "include", "comprise" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements that are not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

Claims

1. A waste heat recovery and utilization device for a thermal power plant, comprising a waste heat exchanger housing (1), characterized in that: The front of the waste heat exchanger housing (1) is provided with an inspection port, and the front of the inspection port is covered with an inspection door (2), and connecting blocks (3) are symmetrically distributed at both ends of the inspection door (2), and the interior of the connecting blocks (3) is provided with a connecting groove (4), and the interior of the connecting groove (4) is respectively inserted with a moving block (5), and the sides of the moving blocks (5) close to each other are connected to the limiting block (6), and the side of the inspection door (2) is provided with a positioning groove adapted to the limiting block (6), and a bidirectional screw (7) is provided above the inspection door (2), and the two ends of the bidirectional screw (7) respectively pass through the connecting block (3) and are connected to the inner wall of the connecting groove (4) through a bearing, and the interior of the moving block (5) is provided with a threaded groove adapted to the bidirectional screw (7).

2. A waste heat recovery and utilization device for a thermal power plant according to claim 1, characterized in that: A slot (11) is provided on the front of the inspection door (2), and a handle (12) is connected to the inner wall of the slot (11).

3. The waste heat recovery and utilization device of a thermal power plant according to claim 1, characterized in that: A rotating plate (8) is connected to the center of the bidirectional screw (7), and the rotating plates (8) are distributed on the outer surface of the bidirectional screw (7) in an arc-shaped array structure.

4. The waste heat recovery and utilization device of a thermal power plant according to claim 1, characterized in that: Four groups of fixing plates (13) are symmetrically connected to the inner wall of the inspection port, and positioning rods (14) are inserted into the interior of the four groups of fixing plates (13), and the front of the positioning rods (14) is connected to the back of the inspection door (2).

5. The waste heat recovery and utilization device of a thermal power plant according to claim 4, characterized in that: The outer wall of the positioning rod (14) is covered with a rubber sleeve (15), and the outer surface of the rubber sleeve (15) is connected to the inner wall of a reserved groove opened inside the fixing plate (13).

6. The waste heat recovery and utilization device of a thermal power plant according to claim 1, characterized in that: The upper and lower ends of the connection block (3) are symmetrically connected to mounting plates (10), and the interior of the mounting plates (10) is connected to the front surface of the waste heat exchanger housing (1) via bolts.

7. The waste heat recovery and utilization device of a thermal power plant according to claim 1, characterized in that: The bottom ends of the two groups of connecting blocks (3) are provided with guide rods (9), and the interior of the moving block (5) is provided with guide grooves adapted to the guide rods (9).

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