Auxiliary tool for adjusting radial sealing clearance of air preheater

Abstract

The utility model discloses an auxiliary tool for adjusting a radial sealing gap of an air preheater, which comprises a truss and a pressure contact switch, one end of the truss is fixed on a rotor shell of the air preheater, the other end of the truss is fixed on a sealing end face of a rotor central shaft of the air preheater, and the pressure contact switch is fixed on the truss. The auxiliary tool for adjusting the radial sealing gap of the air preheater is easy to manufacture and install and small in error, and compared with a traditional method, the error generated by the tool and measurement is reduced by more than 50%. Therefore, the acceptance of each point of the radial sealing gap of the air preheater is synchronously carried out without one-by-one measurement, and the acceptance time is shortened by 80%.

Description

TECHNICAL FIELD

[0001] The utility model relates to coal-fired power plant boiler air preheater air leakage control technical field, concretely relates to a kind of air preheater radial seal gap adjustment auxiliary tool. BACKGROUND

[0002] Rotary air preheater is important auxiliary machine of large coal-fired power plant boiler, and through air preheater heat storage element absorption flue gas heat to heat air supply, improve the economic efficiency of unit operation.The radial seal gap measurement of existing air preheater has the following deficiencies:

[0003] 1, the workload of prior art is large, and time is long

[0004] Since the rotary air preheater is generally selected for the air preheater of large-capacity coal-fired power plant boiler in China at present, 2 air preheaters are selected for each boiler, and 36 or 48 sectors are designed for each air preheater, and 5-6 radial sealing pieces are designed for each sector, and the number of air preheater sealing piece gap points to be measured and adjusted for each boiler is 864 according to 36 sectors and 5 sealing pieces for each air preheater, and 7.2 hours are required to complete air preheater sealing gap acceptance according to 30 seconds for each gap measurement.If the technical level of gap adjustment personnel is low, multiple measurements and acceptances may be required.The workload of air preheater radial sealing gap measurement is large and time is long.

[0005] 2, the error of existing equipment is large

[0006] The radial sealing gap adjustment method of traditional air preheater generally selects steel wire or string, and then gap is measured by ruler or caliper.The error of measurement result is large due to the poor rigidity of steel wire and string. INVENTION CONTENTS

[0007] The utility model aims at providing a kind of air preheater radial sealing gap adjustment auxiliary tool to solve the technical problems of large workload and long time and large error in the radial sealing gap measurement of air preheater in prior art.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions:

[0009] The utility model provides a kind of air preheater radial sealing gap adjustment auxiliary tool, including frame and pressure touch switch, one end of the frame is fixed to the rotor shell of air preheater, and the other end is fixed to the sealing end face of air preheater rotor center shaft, and the pressure touch switch is fixed on the frame.

[0010] Further, one is arranged at the cold end and the hot end of air preheater respectively, and the frame is #12-16 channel steel or square steel.

[0011] Further, the horizontal degree of the frame is adjusted by setting a fulcrum, and the fulcrum is connected with the frame and the lower supporting surface in the form of corner welding.

[0012] Further, the frame is fixed on the air preheater in the form of corner welding.

[0013] Further, the pressure touch switch is fixed on the frame in the form of magnetic attraction or height-adjustable bolt.

[0014] Further, the number of the pressure touch switch is one more than that of the radial sealing sheet.

[0015] Further, the contact height of the pressure touch switch is adjusted according to the gap size of the monitoring points of the radial sealing of the air preheater.

[0016] Further, the indicator light of the pressure touch switch is turned on within the range of 1mm of the contact height change.

[0017] Based on the above technical solutions, the embodiments of the present application can at least produce the following technical effects:

[0018] (1) The air preheater radial sealing gap adjustment auxiliary tool has the advantages of simple manufacturing and installation, small error, and the error generated by the tool and measurement is reduced by more than 50% compared with the traditional method.

[0019] (2) The air preheater radial sealing gap adjustment auxiliary tool makes the air preheater radial sealing gap acceptance points synchronous, and does not need to be measured one by one, and the acceptance time is shortened by 80%. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the present application or prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the drawings shown.

[0021] Figure 1 is a structural schematic diagram of the embodiment of the present application;

[0022] In the figure: 1, frame; 2, pressure touch switch; 3, rotor shell; 4, air preheater rotor center shaft; 5, radial sealing sheet. DETAILED DESCRIPTION

[0023] Clearly, the described embodiments are merely a part of the embodiments of the present application, but not all the embodiments; based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative labor shall fall within the scope of protection of the present application.

[0024] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are merely for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application; unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication between two elements. For a person of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0025] Embodiment 1

[0026] As Figure 1 shown, the utility model provides a kind of air preheater radial sealing gap adjustment auxiliary tool, including row frame 1 and pressure touch switch 2, the row frame 1 one end is fixed to the rotor shell 3 of air preheater, the other end is fixed on the sealing end face of air preheater rotor center shaft 4, and the pressure touch switch 2 is fixed on the row frame 1.

[0027] In the embodiment, the row frame 1 is provided with one at the cold and hot ends of the air preheater, and the row frame 1 is a #12-16 channel steel or square steel.

[0028] In the embodiment, the row frame 1 is fixed on the air preheater by corner welding at both ends.

[0029] In the embodiment, the pressure touch switch 2 is fixed on the row frame 1 by magnetic attraction or height-adjustable bolt.

[0030] In the embodiment, the number of pressure touch switches 2 is one more than the number of radial sealing sheets 5.

[0031] In the embodiment, the contact height of the pressure touch switch 2 is adjusted according to the gap size between the monitoring points of the air preheater radial sealing.

[0032] In the embodiment, the pressure contact switch 2 indicates that the indicator light is on within the range of 1mm of the contact height variation.

[0033] Specific process:

[0034] After the horizontal degree of the frame 1 is adjusted, the pressure contact switch 2 is installed, the contact height of the pressure contact switch 2 is adjusted according to the gap size of the air preheater radial seal monitoring points, according to the thermal expansion principle of the air preheater rotor, the pressure contact switches of the cold and hot sections of the air preheater are in U-shaped distribution, and the height of the radial seal plate 5 of the air preheater is adjusted according to the design data of the radial seal gap of each air preheater. After the auxiliary tool is installed, the maintenance personnel adjust the height of the radial seal plate 5 of the air preheater according to the contact height of the pressure contact switch 2, and when the indicator light of the pressure contact switch 2 is on, the height of the radial seal plate 5 is qualified. When the radial seal plate 5 is installed and accepted, the air preheater rotor is rotated, when each radial seal passes through the auxiliary tool, the indicator lights of all the pressure contact switches 2 are on, and the gap adjustment is qualified.

[0035] The structure, function and connection form disclosed in the present application can be realized by other ways. For example, the above-described embodiments are only illustrative, for example, a plurality of components can be combined or integrated into another component; in addition, each functional component in each embodiment of the present application can be integrated into one functional component, or each functional component can exist physically, or two or more functional components can be integrated into one functional component.

[0036] The above only describes the preferred embodiments of the present application, and it should be pointed out that, for ordinary skilled in the art, without departing from the creative concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application.

Claims

1. An air preheater radial seal gap adjustment aid tool characterized by, It comprises a row frame (1) and a pressure contact switch (2), the row frame (1) is fixed on the sealing end surface of the rotor housing (3) of the air preheater at one end and the rotor central shaft (4) of the air preheater at the other end, and the pressure contact switch (2) is fixed on the row frame (1).

2. The air preheater radial seal gap adjustment aid tool of claim 1, wherein, The row frame (1) is arranged at the cold and hot ends of the air preheater respectively, and is a #12-16 channel steel or square steel.

3. The air preheater radial seal gap adjustment aid tool of claim 1, wherein, The row frame (1) is fixed on the air preheater by means of corner welding.

4. The air preheater radial seal gap adjustment aid tool of claim 1, wherein, The pressure contact switch (2) is fixed on the row frame (1) by magnetic attraction or height-adjustable bolt.

5. The air preheater radial seal gap adjustment aid tool of claim 1, wherein, The number of the pressure contact switch (2) is one more than that of the radial sealing sheet (5).

6. The air preheater radial seal gap adjustment aid tool of claim 1, wherein, The contact height of the pressure contact switch (2) is adjusted according to the gap size between the monitoring points of the radial sealing of the air preheater.

7. The air preheater radial seal gap adjustment aid tool of claim 1, wherein, The indicating light of the pressure contact switch (2) is turned on within the range of 1mm change of the contact height.

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