Built-in Venturi structure of micro-flow desuperheater

Abstract

The built-in venturi structure of the micro-flow desuperheater comprises a valve body, an end cover and the desuperheater, a transverse flow channel is formed in the valve body, and a mounting hole is formed in the upper end of the valve body; the end cover is fixedly installed on the valve body through a connecting piece, a connecting pipeline is arranged at the upper end of the end cover, a connecting column capable of being matched with the installing hole is arranged at the lower end of the end cover, and a water inlet hole communicated with the connecting pipeline is formed in the connecting column. The upper end of the desuperheater is connected with the connecting column, a water through hole capable of being matched with the water inlet hole is formed in the upper end of the desuperheater, and an atomization hole is formed in the other end of the desuperheater. The desuperheater is fixedly connected with the connecting column in a threaded mode and sealed in a welded mode, so that the sealing integrity is guaranteed; desuperheating water enters the desuperheater through the connecting pipeline, is atomized through the fine atomization holes and then is sprayed into the transverse flow channel of the valve body, hot steam and atomized superfine desuperheating water mist are mixed, and therefore the desuperheating effect is achieved.

Description

Technical Field

[0001] This utility model belongs to the field of desuperheater technology and relates to a built-in Venturi structure for a micro-flow desuperheater. Background Technology

[0002] Existing steam desuperheaters use high-pressure desuperheating water, which is atomized through nozzles and enters the high-pressure superheated steam pipeline to achieve a cooling effect. However, in applications with a capacity of 1T / H or less, the main steam pipeline diameter is small, the steam velocity is low, and the desuperheating water flow rate is generally less than 0.3T / H. Under these conditions, conventional spring-back-pressure desuperheaters or integrated desuperheaters are not suitable for installation. Ordinary Venturi desuperheaters suffer from poor atomization due to insufficient desuperheating water flow, leading to significant water accumulation downstream and potential safety hazards. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this utility model provides a built-in Venturi structure for a micro-flow desuperheater.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0005] A built-in Venturi structure for a micro-flow desuperheater includes:

[0006] The valve body has a transverse flow channel inside, and a mounting hole is provided at the upper end of the valve body. The mounting hole and the transverse flow channel are connected by a water spray hole.

[0007] The end cap is fixedly installed on the valve body using a connector. The upper end of the end cap is provided with a connecting pipe, and the lower end of the end cap is provided with a connecting post that can mate with the mounting hole. The connecting post has an inlet hole that communicates with the connecting pipe.

[0008] The desuperheater has its upper end connected to a connecting column. The upper end of the desuperheater has a water passage hole that can cooperate with the water inlet hole. The other end of the desuperheater has an atomizing hole with a diameter of 0.05~0.2mm. The water passage hole and the atomizing hole are connected by a flow channel groove.

[0009] Preferably, the valve body has a first threaded hole on its upper surface, and the end cap has a connecting through hole corresponding to the first threaded hole.

[0010] Preferably, a second threaded hole is provided on the lower part of the connecting column, and an external thread that can cooperate with the second threaded hole is provided on the upper end of the desuperheater.

[0011] Preferably, the upper end of the connecting pipe is provided with a connecting flange.

[0012] Preferably, a sealing gasket is provided between the connecting column and the valve body.

[0013] Preferably, the mounting hole is a stepped hole structure, and the desuperheater is provided with a positioning boss that can cooperate with the step of the mounting hole.

[0014] Preferably, the cooler and the end cap are sealed by welding.

[0015] Preferably, the lower end of the desuperheater is provided with an inclined surface that can cooperate with the water spray hole.

[0016] Compared with the prior art, this utility model has the following advantages:

[0017] The desuperheater of this invention is fixedly connected to the connecting column by a threaded connection and sealed by welding to ensure the integrity of the seal. The desuperheating water enters the desuperheater through the connecting pipe, and then is atomized through the fine atomizing holes and sprayed into the transverse flow channel of the valve body. The hot steam mixes with the atomized ultra-fine desuperheating water mist to achieve the desuperheating effect. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the desuperheater structure of this utility model.

[0020] Figure 3 This is a schematic diagram of the connecting post part of the end cap.

[0021] Figure 4 for Figure 2 Enlarged view of point A in the image.

[0022] In the diagram: 1. Valve body; 2. Transverse flow channel; 3. Mounting hole; 4. End cap; 5. Connector; 6. Connecting pipe; 7. Connecting column; 8. Water inlet; 9. Desuperheater; 10. Water passage hole; 11. Atomizing hole; 12. Flow channel groove; 13. First threaded hole; 14. Connecting through hole; 15. Second threaded hole; 16. Connecting flange; 17. Sealing gasket; 19. Positioning boss; 20. Water spray hole; 21. Inclined surface. Detailed Implementation

[0023] To enable those skilled in the art to better understand the present invention, the technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0024] This embodiment proposes a built-in Venturi structure for a micro-flow desuperheater, including a valve body 1, an end cap 4, and a desuperheater 9. The valve body 1 is used to connect to an external steam pipeline, the end cap 4 seals the valve body 1, and the desuperheater 9 can atomize the desuperheating water.

[0025] like Figures 1-4As shown, a transverse flow channel 2 is provided inside the valve body 1, through which hot steam can flow.

[0026] The upper end of the valve body 1 is provided with a mounting hole 3, and the mounting hole 3 is connected to the transverse flow channel 2 by a water spray hole 20.

[0027] The end cap 4 is fixedly installed on the top of the valve body 1 using the connector 5. A connecting pipe 6 is provided at the upper end of the end cap 4, and the connecting pipe 6 is connected to the desuperheating water pipeline.

[0028] The lower end of the end cap 4 is provided with a connecting post 7 that can cooperate with the mounting hole 3. The connecting post 7 is inserted into the mounting hole 3. The connecting post 7 is provided with a water inlet hole 8 that communicates with the connecting pipe 6. The desuperheating water can enter the mounting hole 3 through the water inlet hole 8, and then enter the transverse flow channel 2 through the spray hole 20.

[0029] The upper end of the desuperheater 9 is connected to the connecting column 7. The upper end of the desuperheater 9 is provided with a water passage hole 10 that can cooperate with the water inlet hole 8. The desuperheating water enters the interior of the desuperheater 9 through the water passage hole 10.

[0030] The other end of the desuperheater 9 is provided with an atomizing hole 11. The water passage 10 and the atomizing hole 11 are connected by a flow channel 12. After the desuperheating water enters the atomizing hole 11 through the flow channel 12, it is atomized and sprayed out to cool the hot steam.

[0031] Furthermore, a first threaded hole 13 is provided on the upper surface of the valve body 1, and a connecting through hole 14 corresponding to the first threaded hole 13 is provided on the end cover 4. The connecting through hole 14 is inserted into the connector 5 to fix the end cover 4 on the valve body 1.

[0032] Furthermore, a second threaded hole 15 is provided on the lower part of the connecting column 7, and an external thread that can cooperate with the second threaded hole 15 is provided on the upper end of the depressor 9. The upper end of the depressor 9 is screwed onto the connecting column 7.

[0033] Furthermore, a connecting flange 16 is provided at the upper end of the connecting pipe 6, which facilitates the connection of the connecting pipe 6 to an external desuperheating water pipe.

[0034] Furthermore, a sealing gasket 17 is provided between the connecting column 7 and the valve body 1 to prevent leakage between the valve body 1 and the end cap 4.

[0035] Furthermore, the mounting hole 3 is a stepped hole structure, and the desuperheater 9 is provided with a positioning boss 19 that can cooperate with the step of the mounting hole 3. The desuperheater 9 is located in the lower section of the mounting hole 3, and the positioning boss 19 facilitates the installation of the desuperheater 9.

[0036] Furthermore, the diameter of the atomizing hole 11 is 0.05~0.2mm.

[0037] Furthermore, the desuperheater 9 and the end cover 4 are sealed by welding to prevent leakage between the desuperheater 9 and the end cover 4.

[0038] Furthermore, the lower end of the desuperheater 9 is provided with an inclined surface 21 that can cooperate with the water spray hole 20.

[0039] Working principle: In use, the valve body 1 is connected to external hot steam pipelines at both ends, and the connecting pipe 6 is connected to the external desuperheating water pipeline through the connecting flange 16. When the hot steam flows in the transverse flow channel 2, the desuperheating water enters the desuperheater 9 through the connecting pipe 6 and the water inlet 10. Then, the desuperheating water enters the atomizing hole 11 through the flow channel groove 12 and is atomized and sprayed out to cool the hot steam. The high-temperature and high-pressure steam passes through the valve body 1. After passing through the contraction section of the valve body 1, the steam velocity increases significantly. Then, it enters the mixing section of the valve body 1 and mixes with the extremely fine water mist sprayed by the desuperheater 9. The mixed steam contains extremely fine water mist and flows to the diffusion section of the valve body 1. The steam divergence angle in the diffusion section of the valve body 1 becomes larger, which can fully mix with the steam in the steam pipeline to achieve precise control of the secondary steam temperature.

[0040] It is understood that the above embodiments are merely exemplary models used to illustrate the principles of this utility model, and this utility model is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of this utility model, and these modifications and improvements are also considered to be within the protection scope of this utility model.

Claims

1. A built-in Venturi structure for a micro-flow desuperheater, characterized in that it comprises: The valve body (1) has a transverse flow channel (2) inside, and an installation hole (3) is provided at the upper end of the valve body (1). The installation hole (3) and the transverse flow channel (2) are connected by a water spray hole (20). End cap (4), the end cap (4) is fixedly installed on the top of valve body (1) by means of connector (5), the upper end of the end cap (4) is provided with a connecting pipe (6), the lower end of the end cap (4) is provided with a connecting post (7) that can cooperate with the mounting hole (3), and the connecting post (7) is provided with a water inlet hole (8) that communicates with the connecting pipe (6). The upper end of the desuperheater (9) is connected to the connecting column (7). The upper end of the desuperheater (9) is provided with a water passage hole (10) that can cooperate with the water inlet hole (8). The other end of the desuperheater (9) is provided with an atomizing hole (11). The diameter of the atomizing hole (11) is 0.05~0.2mm. The water passage hole (10) and the atomizing hole (11) are connected by a flow channel groove (12).

2. The built-in Venturi structure of a micro-flow desuperheater according to claim 1, characterized in that, The valve body (1) has a first threaded hole (13) on its upper surface, and the end cap (4) has a connecting through hole (14) corresponding to the first threaded hole (13).

3. The built-in Venturi structure of a micro-flow desuperheater according to claim 1, characterized in that, The connecting column (7) has a second threaded hole (15) on its lower side, and the cooler (9) has an external thread at its upper end that can cooperate with the second threaded hole (15).

4. The built-in Venturi structure of a micro-flow desuperheater according to claim 1, characterized in that, The upper end of the connecting pipe (6) is provided with a connecting flange (16).

5. The built-in Venturi structure of a micro-flow desuperheater according to claim 3, characterized in that, A sealing gasket (17) is provided between the connecting column (7) and the valve body (1).

6. The built-in Venturi structure of a micro-flow desuperheater according to claim 1, characterized in that, The mounting hole (3) is a stepped hole structure, and the desuperheater (9) is provided with a positioning boss (19) that can cooperate with the step of the mounting hole (3).

7. The built-in Venturi structure of a micro-flow desuperheater according to claim 1, characterized in that, The desuperheater (9) and the end cap (4) are sealed by welding.

8. The built-in Venturi structure of a micro-flow desuperheater according to claim 1, characterized in that, The lower end of the desuperheater (9) is provided with an inclined surface (21) that can cooperate with the water spray hole (20).

Images