Steam condensing device for steam turbine of thermal power plant

Abstract

The steam condensing device comprises a steam condensing pipe, one end of the steam condensing pipe is communicated with a heat preservation chamber, a flange is installed at the front end of the heat preservation chamber, an exhaust pipe is installed on the side wall of the flange, a clamping groove is fixedly connected to the inner wall of the exhaust pipe, and a filter screen is slidably connected to the inner wall of the clamping groove. The number of the filter screens is two, a connecting rod is fixedly connected between the two filter screens, a positioning plate is installed at the front end of the clamping groove, a condensation pipe is installed on the inner wall of the condensation pipe, the inlet end and the outlet end of the condensation pipe both penetrate through the side wall of the condensation pipe to extend to the outside, and a fixing plate is fixedly connected to the outer side of the condensation pipe. A water tank is installed on the upper surface of the fixing plate, and a condensation box is installed outside the inlet end of the condensation pipe. By means of the structure, exhaust steam entering the condensation pipe can be filtered through the filter screen, and it is avoided that impurities are accumulated on the inner wall of the condensation pipe after long-time use.

Description

Technical Field

[0001] The utility model relates to the technical field of steam turbine condensers, in particular to a condensing device for steam turbines in thermal power plants. Background Art

[0002] Condensers are primarily used in steam turbines in thermal power plants and in chemical production processes such as coal chemical and metallurgy. When used in steam turbines, condensers not only condense exhaust steam into water for reuse in the boiler, but also create a vacuum well below atmospheric pressure at the turbine exhaust, improving the turbine's output power and thermal efficiency.

[0003] However, the existing partial condenser does not filter the gas when exhausting the steam from the turbine into the condensation pipe, and impurities in the gas easily enter the condensation pipe. Moreover, after long-term use, the impurities easily accumulate on the inner wall of the condensation pipe, affecting the use of the condensation pipe. Utility Model Content

[0004] The utility model aims to provide a condensing device for a steam turbine in a thermal power plant, which solves the problem that the exhaust steam in the existing condensing pipe lacks filtration when entering the interior of the condensing pipe while cooling the exhaust steam.

[0005] To achieve the above-mentioned object, a condensing device for a steam turbine in a thermal power plant is provided, comprising: a condensing pipe, one end of the condensing pipe being connected to an insulation chamber, a flange being installed at the front end of the insulation chamber, an exhaust pipe being installed at the side wall of the flange, a slot being fixedly connected to the inner wall of the exhaust pipe, a filter being slidably connected to the inner wall of the slot, two filters being provided, a connecting rod being fixedly connected between the two filters, and a positioning plate being installed at the front end of the slot;

[0006] A condensing pipe is installed on the inner wall of the condensing pipe, and the inlet and outlet ends of the condensing pipe extend to the outside through the side wall of the condensing pipe. A fixing plate is fixedly connected to the outside of the condensing pipe, and a water tank is installed on the upper surface of the fixing plate. A condensing box is installed on the outside of the inlet end of the condensing pipe, and a delivery pipe and a return pipe are respectively installed on both sides of the water tank, and both are connected to the inside of the condensing box.

[0007] According to the condensing device for a steam turbine in a thermal power plant, one end of the condensing pipe is connected to an exhaust pipe, a front end of the exhaust pipe is installed with an exhaust pump, and a front end of the exhaust pump is connected to a connecting pipe.

[0008] According to the condensing device for a steam turbine in a thermal power plant, mounting plates are fixedly connected to the outside of the exhaust pipe at intervals and symmetrically, and movable rods are slidably connected to the middle parts of the two connected mounting plates. One end of the movable rod is fixedly connected to a pull rod, and one end of the pull rod is fixedly connected to the side wall of the positioning plate.

[0009] According to the condensing device for a steam turbine in a thermal power plant, two limit plates are installed on the outside of the movable rod, and the middle part of one of the limit plates is slidably connected to the outside of the movable rod and fixedly connected to the side wall of one of the mounting plates.

[0010] According to the condensing device for a steam turbine in a thermal power plant, the middle part of the other limit plate is fixedly connected to the outside of the movable rod, a second spring is installed between the two limit plates, the front end of the movable rod is fixedly connected to a connecting plate, and a positioning hole is opened in the middle of the connecting plate.

[0011] According to the condensing device for a steam turbine in a thermal power plant, a plurality of sleeves are fixedly connected to the outside of the condensing pipe, a first spring is installed inside the sleeve, the upper end of the first spring is fixedly connected to a positioning rod, and the upper end of the positioning rod passes through the middle of the connecting plate and extends to the outside.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. The utility model uses a card slot to cooperate with the filter, and uses a connecting rod to install the two filters, which can effectively filter the exhaust steam and avoid impurities accumulating on the inner wall of the condensate pipe after long-term use. In addition, the movable rod, pull rod and positioning plate are used to cooperate to locate the position of the filter, and it is more convenient to replace the filter.

[0014] 2. The utility model cooperates with a condensation box, a delivery pipe, a return pipe and a water tank. Cooling water is placed inside the water tank. The delivery pipe can be used to deliver the cooling water to the inside of the condensation box. The condensation box is installed outside the inlet end of the condensation pipe, which can keep the water inside the condensation pipe stable, facilitate the cold and heat exchange of the condensation pipe and the exhaust steam, and ensure the exchange effect.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0017] Figure 1 This is a three-dimensional diagram of a condensing device for a steam turbine in a thermal power plant according to the present invention;

[0018] Figure 2 This is a front view of a condensing device for a steam turbine in a thermal power plant according to the present invention;

[0019] Figure 3 This is a three-dimensional diagram of a filter screen for a condensing device for a steam turbine in a thermal power plant according to the present invention;

[0020] Figure 4 For this utility model Figure 2 Enlarged view of point A in the middle.

[0021] In the figure: 1. Condensate pipe; 2. Insulation chamber; 3. Condenser; 4. Exhaust pipe; 5. Exhaust pump; 6. Connecting pipe; 7. Flange; 8. Filter; 9. Slot; 10. Connecting rod; 11. Exhaust pipe; 12. Sleeve; 13. First spring; 14. Connecting plate; 15. Positioning rod; 16. Movable rod; 17. Limiting plate; 18. Second spring; 19. Mounting plate; 20. Pull rod; 21. Condensate box; 22. Delivery pipe; 23. Water tank; 24. Fixing plate; 25. Return pipe; 26. Positioning plate. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the utility model.

[0023] See also Figure 1-4 The embodiment of the utility model provides a technical solution: a condensing device for a steam turbine in a thermal power plant, comprising: a condensing pipe 1, one end of the condensing pipe 1 is connected to an insulation chamber 2, a flange 7 is installed at the front end of the insulation chamber 2, an exhaust pipe 11 is installed on the side wall of the flange 7, a card slot 9 is fixedly connected to the inner wall of the exhaust pipe 11, a filter screen 8 is slidably connected to the inner wall of the card slot 9, which can filter impurities in the exhaust steam to prevent impurities from accumulating on the inner wall of the condensing pipe 1 under long-term use, two filter screens 8 are provided to improve the filtering effect, a connecting rod 10 is fixedly connected between the two filter screens 8, and a positioning plate 26 is installed at the front end of the card slot 9 to position the filter screen 8;

[0024] A condensing pipe 3 is installed on the inner wall of the condensing pipe 1. The inlet and outlet ends of the condensing pipe 3 both pass through the side wall of the condensing pipe 1 and extend to the outside. A fixing plate 24 is fixedly connected to the outside of the condensing pipe 1. A water tank 23 is installed on the upper surface of the fixing plate 24. A water pump is installed inside the water tank 23 to transport cold water to the inside of the condensing box 21 to maintain the temperature inside the condensing pipe 3. A condensing box 21 is installed outside the inlet end of the condensing pipe 3. A delivery pipe 22 and a return pipe 25 are installed on both sides of the water tank 23, and both are connected to the inside of the condensing box 21.

[0025] One end of the condensation pipe 1 is connected to an exhaust pipe 4, and an exhaust pump 5 is installed at the front end of the exhaust pipe 4. The front end of the exhaust pump 5 is connected to a connecting pipe 6. The exhaust pump 5 can be used to extract the internal gas of the condensation pipe 1. The outside of the exhaust pipe 11 is fixedly connected with a mounting plate 19 at intervals and symmetrically. The middle parts of the two mounting plates 19 are slidably connected with a movable rod 16. One end of the movable rod 16 is fixedly connected with a pull rod 20. The movable rod 16 cooperates with the pull rod 20 to pull the positioning plate 26 to move, and with the cooperation of the second spring 18, the positioning plate 26 can be automatically restored to its initial position. One end of the pull rod 20 is fixedly connected to the side wall of the positioning plate 26. Two limit plates 1 are installed on the outside of the movable rod 16. 7. The middle part of one of the limit plates 17 is slidably connected to the outside of the movable rod 16 and is fixedly connected to the side wall of one of the mounting plates 19. The middle part of the other limit plate 17 is fixedly connected to the outside of the movable rod 16. A second spring 18 is installed between the two limit plates 17. The front end of the movable rod 16 is fixedly connected to the connecting plate 14. A positioning hole is provided in the middle of the connecting plate 14. The positioning hole cooperates with the positioning rod 15 to facilitate positioning of the movable rod 16. A plurality of sleeves 12 are fixedly connected to the outside of the condensation pipe 1. A first spring 13 is installed inside the sleeve 12. The upper end of the first spring 13 is fixedly connected to the positioning rod 15. The upper end of the positioning rod 15 passes through the middle of the connecting plate 14 and extends to the outside.

[0026] Working principle: When in use, the exhaust pipe 11 is connected to the insulation chamber 2 by using the flange 7, and the exhaust steam enters the interior of the condensation pipe 1 through the exhaust pipe 11. A card slot 9 is fixedly connected to the inner wall of the exhaust pipe 11, and the outer side of the filter 8 is matched with the card slot 9. The filter 8 can be used to filter impurities in the exhaust steam, and the positioning plate 26 is fitted with the outer side of the filter 8 to position the filter 8. When replacing the filter 8, the positioning rod 15 is pressed to separate the positioning rod 15 from the connecting plate 14, and the pull rod 20 is pulled to drive the movable rod 16 to move, and the second spring 18 is squeezed, and the positioning plate 26 is separated from the filter 8, so that the filter 8 can be replaced. After the replacement is completed, the pull rod 20 is released, and the elasticity of the second spring 18 is used to restore the positioning plate 26 to its initial position, and the positioning rod 15 is passed through the middle of the positioning hole to position the pull rod 20.

[0027] After the exhaust steam enters the condenser pipe 1, the condenser pipe 3 is used to exchange heat with the exhaust steam. Most of the exhaust steam condenses into liquid and is discharged from the lower end. When the coolant passes through the condenser pipe 3 and enters the condenser pipe 1, the water tank 23 and the delivery pipe 22 are used to cooperate to transport the cold water, and the coolant is transported to the inside of the condensation box 21, so that the coolant can maintain normal stability and avoid temperature changes during transportation that affect the effect of heat exchange.

[0028] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A condensing device for a steam turbine in a thermal power plant, comprising: A condensation pipe (1) is characterized in that one end of the condensation pipe (1) is connected to an insulation chamber (2), a flange (7) is installed at the front end of the insulation chamber (2), an exhaust pipe (11) is installed on the side wall of the flange (7), the inner wall of the exhaust pipe (11) is fixedly connected to a card slot (9), the inner wall of the card slot (9) is slidably connected to a filter screen (8), two filter screens (8) are provided, a connecting rod (10) is fixedly connected between the two filter screens (8), and a positioning plate (26) is installed at the front end of the card slot (9); A condensing pipe (3) is installed on the inner wall of the condensing pipe (1), and the inlet and outlet ends of the condensing pipe (3) both pass through the side wall of the condensing pipe (1) and extend to the outside. A fixing plate (24) is fixedly connected to the outside of the condensing pipe (1), and a water tank (23) is installed on the upper surface of the fixing plate (24). A condensing box (21) is installed outside the inlet end of the condensing pipe (3), and a delivery pipe (22) and a return pipe (25) are respectively installed on both sides of the water tank (23), and both are connected to the inside of the condensing box (21).

2. A condensing device for a steam turbine in a thermal power plant according to claim 1, characterized in that: One end of the condensation pipe (1) is connected to an air extraction pipe (4), a front end of the air extraction pipe (4) is installed with an air extraction pump (5), and a front end of the air extraction pump (5) is connected to a connecting pipe (6).

3. The condensing device for a steam turbine in a thermal power plant according to claim 1, characterized in that: The outside of the exhaust pipe (11) is fixedly connected with mounting plates (19) at intervals and symmetrically, and the middle parts of the two connected mounting plates (19) are slidably connected with movable rods (16), one end of the movable rod (16) is fixedly connected with a pull rod (20), and one end of the pull rod (20) is fixedly connected to the side wall of the positioning plate (26).

4. A condensing device for a steam turbine in a thermal power plant according to claim 3, characterized in that: Two limiting plates (17) are installed outside the movable rod (16), wherein the middle portion of one of the limiting plates (17) is slidably connected to the outside of the movable rod (16) and is fixedly connected to the side wall of one of the mounting plates (19).

5. The condensing device for a steam turbine in a thermal power plant according to claim 4, characterized in that: The middle part of the other limiting plate (17) is fixedly connected to the outside of the movable rod (16), a second spring (18) is installed between the two limiting plates (17), the front end of the movable rod (16) is fixedly connected to a connecting plate (14), and a positioning hole is opened in the middle of the connecting plate (14).

6. The condensing device for a steam turbine in a thermal power plant according to claim 1, characterized in that: A plurality of sleeves (12) are fixedly connected to the outside of the condensation pipe (1), a first spring (13) is installed inside the sleeve (12), the upper end of the first spring (13) is fixedly connected to a positioning rod (15), and the upper end of the positioning rod (15) passes through the middle of the connecting plate (14) and extends to the outside.

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