Pipeline condensed water drainage device for central heating system

Abstract

The utility model relates to the technical field of heat supply pipelines, in particular to a pipeline condensed water drainage device for a central heating system, which comprises a drainage hopper, the drainage hopper is fixedly communicated with the bottom of a heat supply pipe, and a heat energy recovery component is fixed at the tail end of the drainage hopper and comprises a water storage tank fixedly communicated with the bottom of the drainage hopper. A liquid level sensor is fixed to one side of the top of the water storage tank in a penetrating mode, a controller is fixed to the surface of the outer wall of the water storage tank, the bottom of the water storage tank fixedly communicates with a drainage electromagnetic valve, and the tail end of the drainage electromagnetic valve fixedly communicates with a water outlet pipe. The surrounding pipe is arranged in the inner cavity of the water storage tank, so that the surrounding pipe is arranged in the condensed water when the heat energy of the condensed water accumulated in the water storage tank is recycled, and the heat energy of the condensed water can be directly transferred to the wall of the surrounding pipe and then directly transferred to cold water in the surrounding pipe; therefore, heat transfer can be carried out only through the pipe wall of the single surrounding pipe, and heat energy loss in the heat transfer process can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of heating pipelines, in particular to a pipeline condensate drainage device for a central heating system. Background Technique

[0002] In a heating system, there is a large amount of heat loss in the transportation of steam. Generally, the temperature drops by 8°C to 10°C per kilometer, and the pressure drops by about 0.08 MPa. Pipeline loss has become the main limiting factor for the economy of steam pipeline transportation. At the same time, due to heat loss, part of the steam condenses into water. As the distance increases, the accumulated condensate may cause a water hammer accident. Therefore, a drainage device needs to be set at a certain distance interval during the design of the steam pipeline to drain the condensate in time. However, the existing condensate drainage devices are relatively simple and cannot converge the condensate in the pipeline, resulting in only simple drainage, and the heat contained in the condensate cannot be recovered, causing waste.

[0003] The existing patent CN202022305003.X discloses a pipeline condensate drainage device for a central heating system, which relates to the technical field of pipeline condensate treatment, including a heating pipeline, a drainage mechanism and a waste heat recovery mechanism. The drainage channel is connected to one side of the heating pipeline, and the end of the drainage channel communicates with a recovery box. The bracket is fixedly connected to the inner cavity of the drainage channel, the sleeve is fixedly connected to the top of the bracket, the baffle is fixedly connected to the top of the connecting rod, one end of the movable plate is hinged to the top of the water collecting cavity, and the floating ball is fixedly connected to the bottom of the support rod.

[0004] In the actual implementation process of the above patent, after draining and accumulating the condensate, when the accumulated condensate reaches a certain amount, the water is pumped into the spiral tube, and the heat energy is recovered by sleeving the spiral tube on the cold water pipe. However, the condensate placed in the surrounding tube needs to transfer the heat to the surrounding tube and then to the cold water pipe wall before it can be transferred to the cold water. After passing through two pipe walls, a large amount of heat is lost, thus affecting the efficiency of heat energy recovery and utilization. Therefore, we propose a pipeline condensate drainage device for a central heating system. Content of the Utility Model

[0005] The purpose of the utility model is to provide a pipeline condensate drainage device for a central heating system, which solves the problems raised in the background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A pipeline condensate drainage device for a central heating system, including a drainage hopper, the drainage hopper is fixedly communicated with the bottom of the heating pipe, and a heat energy recovery component is fixed at the tail end of the drainage hopper;

[0007] The heat energy recovery component includes:

[0008] A water storage tank is fixedly connected to the bottom of the drainage hopper. One side of the top of the water storage tank is fixedly penetrated with a liquid level sensor. The outer wall surface of the water storage tank is fixedly provided with a controller. The bottom of the water storage tank is fixedly communicated with a drain solenoid valve, and the tail end of the drain solenoid valve is fixedly communicated with a water outlet pipe.

[0009] A surrounding pipe is arranged in the inner cavity of the water storage tank. Both ends of the surrounding pipe respectively penetrate through the two side walls of the water storage tank and are respectively communicated with a conduit and a drain pipe through rotary joints. The outer end of the conduit is fixedly communicated with a cold water pipe through a water inlet solenoid valve.

[0010] By adopting the above technical solution, the condensed water in the heat supply pipe will flow along the drainage hopper into the inner cavity of the water storage tank for storage. The liquid level sensor will feedback a liquid level signal to the controller. When a certain liquid level is reached, the controller will open the water inlet solenoid valve, so that the water in the cold water pipe will enter the surrounding pipe, thereby exchanging heat with the heat of the condensed water, so as to realize the recovery of heat energy. And the surrounding pipe is in direct contact with the condensed water, so that the heat energy recovery efficiency can be improved.

[0011] As a preferred embodiment of the present invention, a first gear is fixedly sleeved on the outer wall of one end of the surrounding pipe. The outer wall of the first gear is engaged with a second gear, and the second gear is fixed to the outer end of the transmission shaft of the servo motor.

[0012] By adopting the above technical solution, when recovering heat energy, the servo motor is used to drive the second gear to rotate, and then drive the first gear to rotate, so as to drive the surrounding pipe to rotate in the condensed water, thereby improving the contact uniformity effect between the surrounding pipe and the condensed water, and further improving the efficiency of heat energy recovery and utilization.

[0013] As a preferred embodiment of the present invention, the tail end of the liquid level sensor is higher than the maximum height during the rotation of the surrounding pipe.

[0014] By adopting the above technical solution, it is avoided that there is a space obstacle between the surrounding pipe and the liquid level sensor during the rotation process.

[0015] As a preferred embodiment of the present invention, the tail end of the servo motor is fixedly connected to the side wall of the water storage tank through a mounting bracket.

[0016] By adopting the above technical solution, the stability of the servo motor during use can be ensured.

[0017] As a preferred embodiment of the present invention, the water storage tank is of a double-layer sandwich structure, and heat insulation cotton is filled in the double-layer sandwich cavity of the water storage tank.

[0018] By adopting the above technical solution, the heat preservation cotton can be used to insulate the inside of the water storage tank, so that the loss of heat energy can be reduced again when the heat energy of the condensed water is recycled, and the heat energy recycling efficiency can be improved again.

[0019] As a preferred embodiment of the present invention, the end faces of both ends of the surrounding pipe are concentrically arranged.

[0020] By adopting the above technical solution, when the servo motor drives the surrounding pipe to rotate, the rotation is ensured to be stable, and the situation that the servo motor and the surrounding pipe are damaged due to internal stress is avoided.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] A pipeline condensate drainage device for a central heating system according to the technical solution of the present application. By arranging the surrounding pipe in the inner cavity of the water storage tank, when the heat energy of the condensate stored in the water storage tank is recycled, the surrounding pipe is placed in the condensate, so that the heat of the condensate can be directly transferred to the wall of the surrounding pipe and then directly transferred to the cold water in the surrounding pipe. Therefore, only the wall of a single surrounding pipe is required for heat transfer, which is beneficial to reducing the loss of heat energy during the heat transfer process, and thus is beneficial to improving the efficiency of heat energy recycling;

[0023] When recycling heat energy, by using a servo motor to drive the second gear to rotate, and then driving the first gear to rotate, the surrounding pipe can be driven to rotate in the condensate, so as to improve the uniform contact effect between the surrounding pipe and the condensate, and further improve the efficiency of heat energy recycling and utilization;

[0024] Since the water storage tank is a double-layer sandwich box structure and heat preservation cotton is arranged in the sandwich cavity, the loss of heat energy can be reduced again when the heat energy of the condensate is recycled, and the heat energy recycling efficiency can be improved again. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] By reading the detailed description of the non-restrictive embodiments with reference to the following drawings, other features, objects and advantages of the present invention will become more obvious:

[0026] Figure 1 It is a schematic diagram of the overall structure of the pipeline condensate drainage device for the central heating system of the present invention;

[0027] Figure 2 It is an enlarged schematic diagram of part A of the pipeline condensate drainage device for the central heating system of the present invention;

[0028] Figure 3 It is a schematic cross-sectional view of the pipeline condensate drainage device for the central heating system of the present invention;

[0029] Figure 4 The utility model is a schematic diagram of the cross-sectional structure of the box of the pipeline condensate drainage device for the central heating system.

[0030] In the figure:

[0031] 1. Water storage tank; 11. Liquid level sensor; 12. Drain solenoid valve; 13. Surround pipe; 14. Rotary joint; 15. Conduit; 16. Drain pipe; 17. Water inlet solenoid valve; 18. Cold water pipe; 19. Controller;

[0032] 2. Heating pipe; 21. Drainage bucket;

[0033] 3. First gear; 31. Second gear; 32. Servo motor;

[0034] 4. Thermal insulation cotton. DETAILED DESCRIPTION

[0035] See also Figures 1-4 The utility model provides a technical solution: a pipeline condensate drainage device for a centralized heating system, comprising a drainage hopper 21, the drainage hopper 21 is fixedly connected to the bottom of a heating pipe 2, and a heat recovery component is fixed at the tail end of the drainage hopper 21;

[0036] Heat recovery components include:

[0037] The water storage tank 1 is fixedly connected to the bottom of the drainage bucket 21. The water storage tank 1 can be used to store condensed water. A liquid level sensor 11 is fixed through one side of the top of the water storage tank 1. The liquid level sensor 11 can monitor the water level in the water storage tank 1. A controller 19 is fixed on the outer wall surface of the water storage tank 1. A drainage solenoid valve 12 is fixedly connected to the bottom of the water storage tank 1 and a water outlet pipe is fixedly connected to the tail end of the drainage solenoid valve 12. The drainage solenoid valve 12 can control drainage;

[0038] The surrounding pipe 13 is arranged in the inner cavity of the water storage tank 1. The two ends of the surrounding pipe 13 respectively penetrate the two side walls of the water storage tank 1 and are respectively connected to the conduit 15 and the drain pipe 16 through the rotating joint 14. The outer end of the conduit 15 is fixedly connected to the cold water pipe 18 through the water inlet solenoid valve 17.

[0039] Specifically, the signal output end of the liquid level sensor 11 is connected to the signal input end of the controller 19, the controller 19 is a PLC controller, and the signal output end of the controller 19 is connected to the signal input ends of the water inlet solenoid valve 17 and the drain solenoid valve 12 respectively;

[0040] During actual use, the condensed water in the heat supply pipe 2 will be introduced into the inner cavity of the water storage tank 1 along the drainage hopper 21 for storage. The liquid level sensor 11 will feedback a liquid level signal to the controller 19. When a certain liquid level is reached, the controller 19 will open the water inlet solenoid valve 17, so that the water in the cold water pipe 18 will enter the surrounding pipe 13, thereby exchanging heat with the heat of the condensed water, thus realizing the recovery of thermal energy. And the surrounding pipe 13 is in direct contact with the condensed water, so as to improve the efficiency of thermal energy recovery.

[0041] Furthermore, the water storage tank 1 is of a double-layer sandwich structure, and the double-layer sandwich cavity of the water storage tank 1 is filled with heat-insulating cotton 4. The heat-insulating cotton 4 can be used to insulate the inside of the water storage tank 1, so as to further reduce the loss of thermal energy when recovering and utilizing the thermal energy of the condensed water, and further improve the efficiency of thermal energy recovery.

[0042] As Figure 1 and 2 shown in FIGS. 3; a first gear 3 is fixedly sleeved on the outer wall of one end of the surrounding pipe 13, and a second gear 31 is meshed with the outer wall of the first gear 3. The second gear 31 is fixed to the outer end of the transmission shaft of the servo motor 32;

[0043] When recovering thermal energy, the servo motor 32 is used to drive the second gear 31 to rotate, and then drive the first gear 3 to rotate, so as to drive the surrounding pipe 13 to rotate in the condensed water, so as to improve the contact uniformity effect between the surrounding pipe 13 and the condensed water, and further improve the efficiency of recovering and utilizing thermal energy;

[0044] Furthermore, the tail end of the liquid level sensor 11 is higher than the maximum height during the rotation of the surrounding pipe 13, so as to avoid spatial obstacles between the surrounding pipe 13 and the liquid level sensor 11 during the rotation process.

[0045] Even further, the tail end of the servo motor 32 is fixedly connected to the side wall of the water storage tank 1 through a mounting bracket, so as to ensure the stability of the servo motor 32 during use.

[0046] It is worth introducing that the two end faces of the surrounding pipe 13 are concentrically arranged, so as to ensure stable rotation when the servo motor 32 drives the surrounding pipe 13 to rotate, and avoid the situation that the servo motor 32 and the surrounding pipe 13 are damaged due to internal stress.

[0047] The implementation principle of the pipeline condensate drainage device for a central heating system in this application is as follows: During actual use, the condensate in the heating pipe 2 will be introduced into the inner cavity of the water storage tank 1 along the drainage hopper 21 for storage. The liquid level sensor 11 will feedback the liquid level signal to the controller 19. When a certain liquid level is reached, the controller 19 will open the water inlet solenoid valve 17, so that the water in the cold water pipe 18 will enter the surrounding pipe 13, thereby exchanging heat with the heat of the condensate, thus realizing the recovery of thermal energy. And the surrounding pipe 13 is in direct contact with the condensate, which can improve the efficiency of thermal energy recovery. And when recovering thermal energy, the servo motor 32 is used to drive the second gear 31 to rotate, and then drive the first gear 3 to rotate, so as to drive the surrounding pipe 13 to rotate in the condensate, thereby improving the contact uniformity effect between the surrounding pipe 13 and the condensate, and further improving the efficiency of thermal energy recovery and utilization.

[0048] In addition, all the components included in the pipeline condensate drainage device for a central heating system in this utility model are common standard components or components known to those skilled in the art. Its structure and principle can be known by those skilled in the art through technical manuals or obtained through conventional experimental methods. At the idle place of this device, all the above-mentioned electrical components, which refer to power components, electrical components, and the adapted monitoring computer and power supply, are connected through wires. For the specific connection means, the sequence of work among the electrical components in the following working principle should be referred to to complete the electrical connection. The detailed connection means are well-known technologies in the art. The following mainly introduces the working principle and process, and no further description of electrical control will be made.

Claims

1. A pipeline condensate drainage device for a central heating system, comprising a drainage hopper (21), characterized in that: The drainage hopper (21) is fixedly connected to the bottom of the heating pipe (2), and a heat recovery component is fixed to the tail end of the drainage hopper (21); The heat recovery component comprises: A water storage tank (1) is fixedly connected to the bottom of the drainage bucket (21), a liquid level sensor (11) is fixedly connected to one side of the top of the water storage tank (1), a controller (19) is fixedly connected to the outer wall surface of the water storage tank (1), and a drainage solenoid valve (12) is fixedly connected to the bottom of the water storage tank (1), and a water outlet pipe is fixedly connected to the tail end of the drainage solenoid valve (12); A surrounding pipe (13) is arranged in the inner cavity of the water storage tank (1), and the two ends of the surrounding pipe (13) respectively penetrate the two side walls of the water storage tank (1) and are respectively connected to a conduit (15) and a drain pipe (16) through a rotating joint (14), and the outer end of the conduit (15) is fixedly connected to a cold water pipe (18) through a water inlet electromagnetic valve (17).

2. The pipeline condensate drainage device for a central heating system according to claim 1, characterized in that: A first gear (3) is fixedly sleeved on the outer wall of one end of the surrounding tube (13); a second gear (31) is meshed on the outer wall of the first gear (3); and the second gear (31) is fixed to the outer end of the transmission shaft of the servo motor (32).

3. The pipeline condensate drainage device for a central heating system according to claim 2, characterized in that: The tail end of the liquid level sensor (11) is higher than the maximum height during the rotation of the surrounding tube (13).

4. The pipeline condensate drainage device for a central heating system according to claim 2, characterized in that: The tail end of the servo motor (32) is fixedly connected to the side wall of the water storage tank (1) via a mounting frame.

5. The pipeline condensate drainage device for a central heating system according to claim 1, characterized in that: The water storage tank (1) is a double-layer sandwich structure, and the double-layer sandwich of the water storage tank (1) is filled with thermal insulation cotton (4).

6. The pipeline condensate drainage device for a central heating system according to claim 1, characterized in that: The end surfaces at both ends of the surrounding tube (13) are arranged concentrically.

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