Spray head for cleaning inner wall of heat exchange tube of condenser

Abstract

The utility model discloses a condenser heat exchange tube inner wall cleaning nozzle which comprises a nozzle body, a water flow channel is arranged in the nozzle body, the nozzle body comprises a linear section and a conical surface section, the diameter of the side wall of the conical surface section is gradually increased in the direction from the front side to the rear side, and the rear wall of the conical surface section is connected with the front wall of the linear section. A main cleaning hole is formed in the front wall of the conical surface section, an auxiliary cleaning hole is formed in the side wall of the conical surface section, an included angle is formed between the axis of the auxiliary cleaning hole and the axis of the main cleaning hole, and the main cleaning hole and the auxiliary cleaning hole are both communicated with the water flow channel; according to the structure, the water flow spraying distance can be farther, the water flow entering the heat exchange pipe can spirally rotate around the axis of the heat exchange pipe along the pipe wall of the heat exchange pipe, the water flow in the heat exchange pipe is in a highly turbulent state, and therefore the inner wall of the heat exchange pipe is effectively cleaned.

Description

Technical Field

[0001] The utility model relates to the technical field of cleaning devices, in particular to a nozzle for cleaning the inner wall of a condenser heat exchange tube. Background Art

[0002] The condenser is an important component of the cold end device of a modern thermal power plant. Its main function is to quickly condense the steam after it has done work in the turbine into water, so that a certain vacuum can be established and maintained at the turbine exhaust port to improve the power generation efficiency. If the vacuum at the turbine exhaust port is too low, it will seriously affect the safe and economic operation of the power plant unit. An important reason for the low vacuum at the turbine exhaust port is the scaling of the condenser heat exchange tubes and the dust precipitation therein. The scaling and dust precipitation of the condenser heat exchange tubes will have a serious impact on the heat exchange efficiency of the condenser, and will also cause corrosion of the condenser heat exchange tubes, which is a safety hazard. Therefore, the condenser heat exchange tubes need to be cleaned regularly.

[0003] The condenser online cleaning robot is used to clean the condenser heat exchange tubes. During cleaning, the cleaning device mostly uses the principle of high-pressure water jet to spray high-pressure water on the inner wall of the heat exchange tube for cleaning. The current problem is that the water jet distance is limited. When the water jets in a straight line parallel to the axis of the heat exchange tube, only a part of the tube wall can be cleaned, and the entire tube cannot be effectively cleaned. Utility Model Content

[0004] In view of the defects in the prior art, the utility model provides a nozzle for cleaning the inner wall of the condenser heat exchange tube. This structure can make the water spray distance farther, and can make the water entering the heat exchange tube spirally rotate along the tube wall around the axis of the heat exchange tube, so that the water flow in the heat exchange tube is in a highly turbulent state, thereby achieving effective cleaning of the inner wall of the heat exchange tube.

[0005] A nozzle for cleaning the inner wall of a condenser heat exchange tube comprises a nozzle body, wherein the nozzle body has a water flow channel, the nozzle body comprises a straight section and a conical section, the diameter of the side wall of the conical section gradually increases in the direction from the front side to the rear side, the rear wall of the conical section is connected to the front wall of the straight section, the front wall of the conical section is provided with a main cleaning hole, the side wall of the conical section is provided with a secondary cleaning hole, the axis of the secondary cleaning hole and the axis of the main cleaning hole have an angle, and the main cleaning hole and the secondary cleaning hole are both connected to the water flow channel.

[0006] Preferably, the main cleaning hole is coaxially arranged with the nozzle body.

[0007] Preferably, the axis of the auxiliary cleaning hole is perpendicular to the side wall of the tapered surface section.

[0008] Preferably, the auxiliary cleaning holes are provided in plurality.

[0009] Preferably, the plurality of auxiliary cleaning holes are evenly distributed in the circumferential direction around the axis of the main cleaning hole.

[0010] Preferably, the main cleaning hole is a circular hole.

[0011] Preferably, the auxiliary cleaning hole is an elliptical hole.

[0012] Preferably, it also includes a hexagonal prism, and the straight line segment passes through the hexagonal prism and is fixedly connected to the hexagonal prism.

[0013] The beneficial effects of the utility model are embodied in: in the technical scheme, the nozzle body is divided into a straight section and a conical section, wherein the diameter of the side wall of the conical section gradually increases in the direction from the front side to the rear side, a main cleaning hole is arranged on the front wall of the conical section, and a secondary cleaning hole is arranged on the side wall of the conical section. During cleaning, water flows in from the water flow channel, and is sprayed along the axis of the nozzle body through the main cleaning hole, thereby ensuring a longer spraying distance. The water flow sprayed through the secondary cleaning hole can make the water flow entering the heat exchange tube spirally rotate along the wall of the heat exchange tube around the axis of the heat exchange tube, so that the water flow in the heat exchange tube is in a highly turbulent state, thereby making full use of the principles of liquid dynamics, thereby achieving effective cleaning of the inner wall of the heat exchange tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0016] In the attached drawings, 1-straight line segment, 2-conical segment, 3-secondary cleaning hole, 4-main cleaning hole, 5-hexagonal prism. DETAILED DESCRIPTION

[0017] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0018] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field to which the utility model belongs.

[0019] Example 1

[0020] like Figure 1As shown, in this embodiment, a condenser heat exchange tube inner wall cleaning nozzle is provided, including a nozzle body, wherein the nozzle body has a water flow channel, the nozzle body includes a straight section 1 and a conical section 2, the diameter of the side wall of the conical section 2 gradually increases from the front side to the rear side, the rear wall of the conical section 2 is connected to the front wall of the straight section 1, a main cleaning hole 4 is opened on the front wall of the conical section 2, and a secondary cleaning hole 3 is opened on the side wall of the conical section 2, the axis of the secondary cleaning hole 3 and the axis of the main cleaning hole 4 have an angle, and the main cleaning hole 4 and the secondary cleaning hole 3 are both connected to the water flow channel.

[0021] In this embodiment, the main cleaning hole 4 is coaxially arranged with the nozzle body.

[0022] In this embodiment, the axis of the auxiliary cleaning hole 3 is perpendicular to the side wall of the conical surface section 2 .

[0023] In this embodiment, the auxiliary cleaning holes 3 are provided in plurality.

[0024] In this embodiment, the plurality of auxiliary cleaning holes 3 are evenly distributed in the circumferential direction around the axis of the main cleaning hole 4 .

[0025] In this embodiment, the main cleaning hole 4 is a circular hole.

[0026] In this embodiment, the auxiliary cleaning hole 3 is an elliptical hole.

[0027] This embodiment also includes a hexagonal prism 5 , and the straight line segment 1 passes through the hexagonal prism 5 and is fixedly connected to the hexagonal prism 5 .

[0028] In this embodiment, the straight line segment 1 and the conical surface segment 2 are integrally formed, and the straight line segment 1 and the hexagonal prism 5 are integrally formed.

[0029] In this embodiment, the nozzle body is divided into a straight section 1 and a conical section 2, wherein the diameter of the side wall of the conical section 2 gradually increases from the front side to the rear side, a main cleaning hole 4 is provided on the front wall of the conical section 2, and a secondary cleaning hole 3 is provided on the side wall of the conical section 2. During cleaning, water flows in from the water flow channel, and is sprayed along the axis of the nozzle body through the main cleaning hole 4 to ensure a longer spraying distance, and is sprayed through the secondary cleaning hole 3. The water flow sprayed from the secondary cleaning hole 3 can make the water flow entering the heat exchange tube spirally rotate along the wall of the heat exchange tube around the axis of the heat exchange tube, so that the water flow in the heat exchange tube is in a highly turbulent state, thereby making full use of the principle of liquid dynamics, thereby achieving effective cleaning of the inner wall of the heat exchange tube.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

Claims

1. A nozzle for cleaning the inner wall of a condenser heat exchange tube, characterized in that: The invention comprises a nozzle body, wherein the nozzle body has a water flow channel, the nozzle body comprises a straight section (1) and a conical section (2), the diameter of the side wall of the conical section (2) gradually increases from the front side to the rear side, the rear wall of the conical section (2) is connected to the front wall of the straight section (1), the front wall of the conical section (2) is provided with a main cleaning hole (4), the side wall of the conical section (2) is provided with a secondary cleaning hole (3), the axis of the secondary cleaning hole (3) and the axis of the main cleaning hole (4) form an angle, and the main cleaning hole (4) and the secondary cleaning hole (3) are both connected to the water flow channel.

2. A condenser heat exchange tube inner wall cleaning nozzle according to claim 1, characterized in that: The main cleaning hole (4) is coaxially arranged with the nozzle body.

3. A condenser heat exchange tube inner wall cleaning nozzle according to claim 1, characterized in that: The axis of the auxiliary cleaning hole (3) is perpendicular to the side wall of the conical surface section (2).

4. A condenser heat exchange tube inner wall cleaning nozzle according to claim 1, characterized in that: The auxiliary cleaning holes (3) are arranged in plurality.

5. A condenser heat exchange tube inner wall cleaning nozzle according to claim 4, characterized in that: The plurality of auxiliary cleaning holes (3) are evenly distributed in the circumferential direction around the axis of the main cleaning hole (4).

6. A condenser heat exchange tube inner wall cleaning nozzle according to claim 1, characterized in that: The main cleaning hole (4) is a circular hole.

7. A condenser heat exchange tube inner wall cleaning nozzle according to claim 1, characterized in that: The auxiliary cleaning hole (3) is an elliptical hole.

8. The condenser heat exchange tube inner wall cleaning nozzle according to claim 1, characterized in that: It also comprises a hexagonal prism (5), and the straight line segment (1) passes through the hexagonal prism (5) and is fixedly connected to the hexagonal prism (5).

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