On-line monitoring device for tension of boiler suspender body

Abstract

The utility model belongs to the technical field of thermal power plant boiler equipment, and particularly relates to a boiler suspender body tension on-line monitoring device which comprises a boiler body, at least one suspender body used for hoisting is arranged on the top of the boiler body, and a fastener used for fastening is arranged on the suspender body. A tension test assembly used for detecting tension of the suspender body is arranged between the fastener and the boiler body, the tension test assembly comprises an annular force measurement sensor electrically connected with an external terminal, the suspender body is sleeved with the annular force measurement sensor, and the annular force measurement sensor is provided with a stress end abutting against the bottom of the fastener; according to the utility model, the actual stress condition of the suspender provided with the force transducer can be monitored on line in real time through the additionally arranged tension testing assembly, and the annular force transducer is adopted, so that the installation is convenient, and the structural size of the original suspension device is not influenced.

Description

Technical Field

[0001] The utility model belongs to the technical field of boiler equipment in thermal power plants, and particularly relates to an on-line monitoring device for the tensile force of a boiler hanger rod body. Background Technique

[0002] The boiler body of a thermal power plant generally adopts suspension support, and most of the equipment connected thereto also adopts a hanging structure. Therefore, in the entire boiler system, the number of hanger rod bodies is large, and the load borne by each hanger rod body is large. The safety status of the hanging device plays an important role in the safety of the entire boiler system.

[0003] Due to many reasons such as calculation errors, equipment deformation, and inconsistent expansion amounts, the actual stress values of most hanger rod bodies deviate more or less from the theoretical calculation values, manifested as some hanger rod bodies being "loose" and some hanger rod bodies being "tight", only with different degrees; when this difference is too large, some hanger rod bodies will be overstressed, and the weak parts in their corresponding hanging structures may undergo plastic deformation or even damage. Generally, on-site, the stress of the hanger rod body is adjusted by adjusting the adjusting nut in the hanging device, but only auxiliary means can be used to judge the adjustment result, and the accuracy is not high. At the same time, during the operation of the boiler, the stress conditions of the hanger rod body also change under different boiler loads. Therefore, the hanging device, which is an important part of the boiler system, is actually in a state of lacking real-time accurate quantitative monitoring, which is not conducive to power plant management and the future digital construction of power plants. Content of the Utility Model

[0004] The purpose of the utility model is to provide an on-line monitoring device for the tensile force of a boiler hanger rod body to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: An on-line monitoring device for the tensile force of a boiler hanger rod body, comprising: a boiler body, at least one hanger rod body for hoisting is provided at the top of the boiler body, a fastener for fastening is provided on the hanger rod body, and a tensile force test component for detecting the tensile force of the hanger rod body is provided between the fastener and the boiler body. The tensile force test component includes a ring-shaped force sensor electrically connected to an external terminal. The ring-shaped force sensor is sleeved on the hanger rod body, and a stress end abutted against the bottom of the fastener is provided on the ring-shaped force sensor.

[0006] Preferably, an alarm component for tensile force alarm is further provided on one side of the boiler body. The alarm component includes a single-chip microcomputer and an alarm lamp and a buzzer integrated on the single-chip microcomputer. The single-chip microcomputer is electrically connected to the ring-shaped force sensor.

[0007] Preferably, a dust-proof cover for dust-proof is further provided outside the annular force sensor. A through hole through which the through-hanging boom body passes is formed in the top of the dust-proof cover. The bottom of the dust-proof cover abuts against the top of the boiler body. An installation hole for accommodating a single-chip microcomputer is formed in the outer wall of the dust-proof cover.

[0008] Preferably, a wire slot is formed through the dust-proof cover from outside to inside. A cable passing through the wire slot is provided on the annular force sensor. Dust-proof brushes which are attached to each other are symmetrically provided on the inner walls on both sides of the wire slot.

[0009] Preferably, the fastener includes a nut. A partial external thread groove is provided on the boom body. The nut is sleeved on the external thread groove.

[0010] Preferably, a cushion block is further provided at the bottom of the annular force sensor. The cushion block is sleeved on the boom body.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] (1) By adding a tensile test component, the utility model can monitor the actual stress condition of the boom equipped with the force sensor in real time and online. By adopting the annular force sensor, the installation is convenient and does not affect the structural dimensions of the original hanging device.

[0013] (2) By adding an alarm component, the alarm lamp and buzzer in the alarm component in the utility model facilitate the accurate positioning of the boom with abnormal stress and facilitate the maintenance personnel to quickly find the abnormal position. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the utility model;

[0015] Figure 2 is a perspective view of the tensile test component of the utility model;

[0016] Figure 3 is a perspective view of the dust-proof cover and the dust-proof brush of the utility model;

[0017] In the figure: 1. Boiler body; 2. Cushion block; 3. Annular force sensor; 4. Stress end; 5. Buzzer; 6. Alarm lamp; 7. Single-chip microcomputer; 8. Installation hole; 9. Boom body; 10. External thread groove; 11. Through hole; 12. Dust-proof cover; 13. Nut; 14. Wire slot; 15. Cable; 16. Dust-proof brush. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0019] Referring to Figure 1-2 As shown, an on-line monitoring device for the tensile force of the boiler hanger rod body provided by the present invention includes: a boiler body 1, at least one hanger rod body 9 for hoisting is provided at the top of the boiler body 1, a fastener for fastening is provided on the hanger rod body 9, and a tensile force test assembly for detecting the tensile force of the hanger rod body 9 is provided between the fastener and the boiler body 1. The tensile force test assembly includes a ring-shaped force sensor 3 electrically connected to an external terminal. The ring-shaped force sensor 3 is sleeved on the hanger rod body 9, and a force-receiving end 4 abutted against the bottom of the fastener is provided on the ring-shaped force sensor 3.

[0020] Combined with Figure 1 As shown, a cushion block 2 for protection is further provided between the ring-shaped force sensor 3 and the boiler body 1. The cushion block 2 is sleeved on the hanger rod body 9, and the ring-shaped force sensor 3 is prevented from being damaged by the boiler body 1 through the cushion block 2.

[0021] In the above, when using the boiler body 1, the hanger rod body 9, the fastener and the tensile force test assembly provided by the present invention, the actual tensile force received by the hanger rod body 9 is obtained by adding a ring-shaped force sensor 3 between the nut 13 and the cushion block 2 at one end of the hanger rod body 9. The hanger rod body 9 passes through the middle of the ring-shaped force sensor 3, and the nut 13 transmits the pressure to the force-receiving end 4. When the ring-shaped force sensor 3 is compressed, it generates a small deformation and outputs an mV signal to an external controller. The external controller converts and amplifies the mV signal for on-site display and sends it to the boiler DCS control system. The actual accurate force-bearing condition of the hanger rod body 9 installed with the force sensor can be monitored in real time online. The over-limit judgment can be set to perform over-limit alarm in the DCS, which is beneficial for the power plant to timely understand the actual state of the equipment and implement reasonable disposal measures, increasing the safety and reliability of the equipment and preventing the occurrence of accident risks.

[0022] Furthermore, in order to facilitate the installation of the tensile force test assembly between the hanger rod body 9 and the boiler body 1, referring to Figure 1 As shown, the fastener includes a nut 13. A partial external thread groove 10 is provided on the hanger rod body 9. The nut 13 is screwed on the external thread groove 10, and the ring-shaped force sensor 3 is stressed between the hanger rod and the boiler body 1 through the nut 13 and the external thread groove 10.

[0023] In the present invention, combined with Figure 1As shown, on one side of the boiler body 1 of this embodiment, there is also an alarm component for tension alarm. The alarm component includes a single-chip microcomputer 7, an alarm lamp 6 and a buzzer 5 integrated on the single-chip microcomputer 7. The single-chip microcomputer 7 is electrically connected to the annular force sensor 3.

[0024] As described above, when using the alarm component provided by the present utility model, when the annular force sensor 3 detects that the force is in the abnormal area, it gives out sound and light alarms through the alarm lamp 6 and the buzzer 5.

[0025] In the present utility model, in combination with Figure 1 and Figure 3 As shown, outside the annular force sensor 3 of this embodiment, there is also a dust-proof cover 12 for dust prevention. A through hole 11 through which the through-hanger boom body 9 passes is provided through the top of the dust-proof cover 12. The bottom of the dust-proof cover 12 abuts against the top of the boiler body 1. An installation hole 8 for accommodating the single-chip microcomputer 7 is provided on the outer wall of the dust-proof cover 12.

[0026] As described above, when using the dust-proof cover 12 provided by the present utility model, the dust-proof cover 12 can prevent external dust from falling on the annular force sensor 3 and improve the service life of the annular force sensor 3.

[0027] Furthermore, in order to facilitate dust prevention for the gap between the cable 15 and the dust-proof cover 12, with reference to Figure 1 and Figure 3 As shown, a wire groove 14 runs through the dust-proof cover 12 from outside to inside. A cable 15 passing through the wire groove 14 is provided on the annular force sensor 3. Dust-proof brushes 16 are symmetrically provided and fitted on the inner walls on both sides of the wire groove 14. The dust-proof brushes 16 facilitate the cable 15 to be stuck into the wire groove 14, and at the same time, the dust-proof brushes 16 play a role in dust prevention in the wire groove 14.

[0028] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. An on-line monitoring device for the tensile force of a boiler hanger rod body, characterized in that, Including: A boiler body (1), at least one suspension rod body (9) for hoisting is provided at the top of the boiler body (1), a fastening member is provided on the suspension rod body (9), and a tensile test assembly for detecting the tensile force of the suspension rod body (9) is provided between the fastening member and the boiler body (1). The tensile test assembly includes an annular force sensor (3) electrically connected to an external terminal. The annular force sensor (3) is sleeved on the suspension rod body (9). A force-receiving end (4) abutted against the bottom of the fastening member is provided on the annular force sensor (3). The fastening member includes a nut (13). A partial external thread groove (10) is provided on the suspension rod body (9). The nut (13) is screwed on the external thread groove (10). A cushion block (2) is further provided at the bottom of the annular force sensor (3). The cushion block (2) is sleeved on the suspension rod body (9).

2. The on-line monitoring device for the tensile force of the boiler hanger rod body according to claim 1, characterized in that: An alarm assembly for tensile alarm is further provided on one side of the boiler body (1). The alarm assembly includes a single-chip microcomputer (7), an alarm lamp (6) and a buzzer (5) integrated on the single-chip microcomputer (7). The single-chip microcomputer (7) is electrically connected to the annular force sensor (3).

3. The on-line monitoring device for the tensile force of the boiler hanger rod body according to claim 2, characterized in that: A dust-proof cover (12) for dust-proof is further provided outside the annular force sensor (3). A through hole (11) through which the suspension rod body (9) passes is provided at the top of the dust-proof cover (12). The bottom of the dust-proof cover (12) abuts against the top of the boiler body (1). An installation hole (8) for accommodating the single-chip microcomputer (7) is provided on the outer wall of the dust-proof cover (12).

4. The online monitoring device for the tensile force of the boiler hanger rod body according to claim 3, characterized in that: A wire groove (14) penetrates through the dust-proof cover (12) from outside to inside. A cable (15) passing through the wire groove (14) is provided on the annular force sensor (3). Dust-proof brushes (16) which are symmetrically and fittingly arranged are provided on the inner walls on both sides of the wire groove (14).

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