A type of positive float-type drain condensate

Abstract

This utility model relates to a positive float-type condensate drain. A top cover is fixedly connected to the top of the outer cylinder, and a drain pipe runs through the center of the top cover. An inner cylinder is coaxially disposed within the outer cylinder. The upper end of a suction pipe extends to the outside of the outer cylinder, and the lower end of the suction pipe passes through the top cover of the inner cylinder and is located within the inner cavity. Multiple small drainage holes are provided on the bottom side wall of the suction pipe. Multiple water inlets are provided on the top cover of the inner cylinder, allowing condensate to simultaneously enter the inner cylinder and the gap between the inner and outer cylinders. A top cone is fixed to the center of the upper surface of the lower end of the inner cylinder and is adapted to the suction inlet at the lower end of the suction pipe. The inner cylinder can move up and down along the suction pipe using buoyancy and gravity, causing the top cone to seal the suction pipe or open the suction inlet. This utility model utilizes the principle of buoyancy, employs a relatively simple mechanical structure, is lightweight and small in size, can expel cold air, achieves effective separation of air and water (condensate), is insensitive to swaying, can operate reliably for a long time, and is suitable for use on ships.

Description

Technical Field

[0001] This utility model relates to the technical field of steam condensate drainage equipment for industrial steam systems. Specifically, it relates to a novel positive float-type steam condensate drainage device suitable for ship secondary circuits and steam turbines, used to achieve efficient separation of air and condensate in steam systems, while adapting to the rolling environment of ships and ensuring long-term reliable operation. Background Technology

[0002] There are many types of steam traps, which can be classified according to their operating principle into buoyancy type, thermostatic type, thermodynamic type, and combined type. Only steam traps that operate on buoyancy, i.e., buoyancy-type steam traps, can effectively separate air and water by blocking steam and draining water.

[0003] Buoyancy-type condensate drains are classified into three types: upright float type, inverted bucket type, and float ball type.

[0004] Inverted bucket steam traps are reliable and can expel cold air, but they are sensitive to swaying and are not recommended for use on ships. Float-type steam traps are simple in structure and reliable in operation, but require additional devices to expel cold air and cannot automatically expel non-condensable gases.

[0005] Conventional floating buoy-type steam traps have a simple structure and can expel cold air, but they are heavy, large, have a small displacement, and are sensitive to swaying, making them unsuitable for marine use. For example, patent document (CN201306703Y) describes a design that, while capable of expelling cold air, relies on the sliding fit between the inner and outer cylinders, resulting in a large size and heavy weight (unsuitable for lightweight shipbuilding requirements) and a small displacement (typically ≤5m³ / hour per unit). 3 More importantly, its pontoon raising and lowering relies on linear sliding, which can easily lead to "uneven wear" or "jamming" when the ship rolls, resulting in unstable drainage. Patent document (CN202884460U): Although the pontoon is stabilized by a protective sleeve and a normally open regulating valve is added to increase the discharge, the protective sleeve and two-section outlet pipe increase the size of the equipment (40% larger in diameter than the conventional positive pontoon type), and the lining of easily worn parts needs to be replaced regularly, resulting in a short maintenance cycle (usually 1-2 years); at the same time, it does not have a dedicated venting structure, and the discharge of cold air depends on the movement of the pontoon, which is inefficient and can easily lead to air stagnation, affecting the heat exchange efficiency.

[0006] In summary, existing steam traps cannot simultaneously meet the core requirements of the marine industry for "light weight, small size, anti-sway, high efficiency in air venting, large discharge capacity, and long maintenance cycle," and there is an urgent need for a new type of positive float-type steam trap with targeted improvements. Summary of the Invention

[0007] In response to the need for buoyancy-type condensate drains on ships, this utility model proposes a novel positive buoy-type condensate drain. Utilizing the principle of buoyancy, it employs a relatively simple mechanical structure, requiring light weight and small size. It can expel cold air, effectively separate air (air) and water (condensate), is insensitive to swaying, can operate reliably for a long time, and is suitable for use on ships.

[0008] To achieve the above objectives, the technical solution of this utility model is as follows: a positive float-type condensate drainer, comprising a top cover, an outer cylinder, an inner cylinder, a top cone, a suction pipe, and a drain pipe; the top cover is fixedly connected to the top of the outer cylinder, and the drain pipe is disposed through the center of the top cover for discharging air from the air-water mixture; the inner cylinder is coaxially disposed within the outer cylinder; the upper end of the suction pipe extends to the outside of the outer cylinder, and the lower end of the suction pipe penetrates the top cover of the inner cylinder and is located within the inner cavity of the inner cylinder, with multiple small drainage holes on the bottom side wall of the suction pipe; the top cover of the inner cylinder has multiple water inlet holes, allowing condensate to simultaneously enter the inner cylinder and the gap between the inner cavity and the outer cylinder; the top cone is fixed to the center of the upper surface of the lower end of the inner cylinder and is adapted to the suction inlet at the lower end of the suction pipe; the inner cylinder can move up and down along the suction pipe by buoyancy and gravity, driving the top cone to seal the suction pipe or open the suction inlet.

[0009] Furthermore, the upper end of the straw is connected to a condenser.

[0010] Furthermore, when condensate enters the outer and inner cylinders, the inner cylinder floats up under buoyancy and the top cone blocks the suction port of the suction pipe.

[0011] Furthermore, when the weight of the condensate inside the inner cylinder is greater than the buoyancy, the inner cylinder descends, the top cone separates from the suction inlet of the suction tube, and the condensate enters the suction tube through the small hole at the bottom of the suction tube and is discharged into the condenser, thus achieving gas-water separation.

[0012] Furthermore, the inner chamber of the condenser connected to the suction tube draws condensate back into the suction tube through negative pressure and delivers it to the condenser.

[0013] Furthermore, the sealing surface of the top cone has an arc-shaped structure that fits against the inner wall of the straw inlet.

[0014] The beneficial effects of this utility model are:

[0015] This invention relates to a novel positive float-type steam trap that effectively separates air and condensate. It is lightweight, compact, has a large displacement capacity, is durable, easy to maintain, and insensitive to ship roll. It can be reliably used in marine steam turbine systems and can also be applied to other land-based steam applications. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of the novel positive float-type drain condensate of this utility model;

[0017] In the diagram: 1. Drain pipe, 2. Top cover, 3. Outer cylinder, 4. Inner cylinder, 5. Suction pipe, 6. Top cone. Detailed Implementation

[0018] The technical solution of this utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] like Figure 1 As shown, this utility model discloses a novel positive float-type drainer, which consists of a top cover 2, an outer cylinder 3, an inner cylinder 4, a top cone 6, a suction pipe 5, and a drain pipe 1.

[0020] The top cover 2 is fixedly connected to the top of the outer cylinder 3; the vent pipe 1 is installed through the center of the top cover 2 to discharge air from the gas-water mixture; the inner cylinder 4 is coaxially installed inside the outer cylinder 3, and the top cover of the inner cylinder 4 is an unsealed structure with multiple water inlets, allowing condensate to simultaneously enter the inner cavity (cavity B) of the inner cylinder 4 and the gap cavity (cavity C) between the inner cylinder 4 and the outer cylinder 3; the upper end of the suction pipe 5 extends to the outside of the outer cylinder 3 and is used to connect to the condenser, and the lower end of the suction pipe 5 penetrates the top cover of the inner cylinder 4 and is located inside the inner cavity of the inner cylinder 4, with multiple vent pipes on the bottom sidewall of the suction pipe 5. A small water inlet is provided; the inner cylinder 4 can move up and down along the suction pipe 5, and the top cone 6 is fixed at the center of the bottom upper surface of the inner cylinder 4, which is adapted to the suction port at the lower end of the suction pipe 5 for sealing or opening the suction port of the suction pipe 5; when condensate enters the outer cylinder 3 and the inner cylinder 4, the inner cylinder 4 floats up along the suction pipe 5 under the action of buoyancy, and the top cone 6 blocks the suction port of the suction pipe 5; when the weight of the condensate in the inner cylinder 4 is greater than the buoyancy, the inner cylinder 4 descends, the top cone 6 separates from the suction port of the suction pipe 5, and the condensate enters the suction pipe 5 through the small hole at the bottom of the suction pipe 5 and is discharged into the condenser, realizing gas-water separation.

[0021] This invention utilizes the principle of buoyancy and gravity balance in physics. When the air-water mixture enters the outer cylinder through the inlet, air is discharged through the vent pipe on the top cover. Because the top cover of the inner cylinder has multiple holes and is an unsealed structure, condensate enters both the outer and inner cylinders simultaneously. Under the action of buoyancy, the inner cylinder floats. When the condensate in the inner cylinder (float) reaches a certain amount, gravity exceeds buoyancy, the float descends, and the pipe holes originally sealed by the top cone are opened. The condensate immediately enters the suction pipe through the small hole at the bottom of the suction pipe and is discharged into the condenser, thus achieving effective separation of air and water.

[0022] When the mixture of air and water (condensate) enters the outer cylinder 3 through the inlet (marked in the diagram), some of the condensate enters chamber "B" inside the inner cylinder 4, while some of the condensate enters chamber "C" between the float 4 and the outer cylinder 3. Air is discharged from the vent pipe 1 on the cover plate 2. Under the influence of buoyancy, the inner cylinder 4 floats up and is blocked by the top cone 6 at the suction inlet of the suction pipe 5. When the condensate in the inner cylinder 4 reaches a certain amount, gravity exceeds buoyancy, and the inner cylinder 4 descends. At this point, due to the negative pressure in chamber "A" of the suction pipe connected to the condenser, the condensate is drawn back into the suction pipe 5 and transported to the condenser. This achieves air-water separation of the condensate containing air before it enters the condenser.

[0023] In summary, the novel positive buoy-type condensate drain of this utility model, through the above embodiments, can achieve the core requirements of "anti-sway, high efficiency, large displacement, long service life, and easy maintenance", and is fully adaptable to the application scenarios in the fields of marine secondary circuits and steam turbines, and has broad application value.

Claims

1. A positive float-type drain condensate, characterized in that, The device includes a top cover, an outer cylinder, an inner cylinder, a top cone, a suction tube, and a drain pipe. The top cover is fixedly connected to the top of the outer cylinder, and the drain pipe is installed through the center of the top cover to discharge air from the air-water mixture. The inner cylinder is coaxially installed inside the outer cylinder. The upper end of the suction tube extends to the outside of the outer cylinder, and the lower end of the suction tube penetrates the top cover of the inner cylinder and is located in the inner cavity. Multiple small drainage holes are provided on the bottom side wall of the suction tube. The top cover of the inner cylinder has multiple water inlet holes, allowing condensate to simultaneously enter the inner cylinder and the gap between the inner cavity and the outer cylinder. The top cone is fixed to the center of the upper surface of the lower end of the inner cylinder and is adapted to the suction port at the lower end of the suction tube. The inner cylinder can move up and down along the suction tube by buoyancy and gravity, causing the top cone to seal the suction tube or open the suction port.

2. The positive float-type drain condensate according to claim 1, characterized in that, The upper end of the straw is connected to the condenser.

3. The positive float-type drain condensate according to claim 1, characterized in that, When condensate enters the outer and inner cylinders, the inner cylinder floats up under buoyancy and the top cone blocks the suction inlet of the suction pipe.

4. The positive float-type drain condensate according to claim 3, characterized in that, When the weight of the condensate inside the inner cylinder is greater than the buoyancy, the inner cylinder descends, the top cone separates from the suction inlet of the suction tube, and the condensate enters the suction tube through the small hole at the bottom of the suction tube and is discharged into the condenser, thus achieving gas-water separation.

5. The positive float-type drain condensate according to claim 4, characterized in that, The inner chamber of the condenser is connected to the suction tube, and condensate is drawn back into the suction tube by negative pressure and then transported to the condenser.

6. The positive float-type drain condensate according to claim 1, characterized in that, The sealing surface of the top cone has an arc-shaped structure and fits against the inner wall of the suction inlet of the straw.

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