Safety inspection equipment for pressure-bearing component of boiler

Abstract

The utility model belongs to the technical field of pressure-bearing part detection, particularly relates to safety inspection equipment for a pressure-bearing part of a boiler, and aims to solve the problems that an existing device only depends on a magnifying lens to observe the surface, the condition inside a valve cannot be seen, and some tiny defects on the surface of the valve cannot be clearly observed. Comprising a valve pressure-bearing piece, and a first sealing cover and a second sealing cover are arranged on the outer side of the valve pressure-bearing piece; the beneficial effects of the utility model are that the leakage gas entering the sealed space is detected by a plurality of detection means, no matter a leakage source is located on the surface of the pressure-bearing member of the valve or deeply hidden in the internal structure of the valve, the leakage gas can be clearly reflected through the air flow sensor, the air flow buzzer and the spoon-shaped rotating member as long as the leakage gas enters the conical cover, and the detection accuracy is improved. Omni-directional and dead-corner-free leakage detection of the valve pressure-bearing part is realized, and the integrity and reliability of the equipment for detecting the sealing performance of the valve pressure-bearing part are comprehensively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a safety inspection equipment, concretely to a boiler pressure part safety inspection equipment, belongs to pressure part detection technical field. BACKGROUND

[0002] The boiler is a kind of energy conversion equipment, and the energy input to the boiler includes chemical energy in fuel and electric energy, and the boiler outputs steam, high-temperature water or organic heat carrier with certain heat energy, and the boiler pressure part includes valve, flange, furnace, kettle shell, tube plate, drum, header, steam collecting tank, water-cooled wall pipe, convection pipe and downcomer, and some boilers also have economizer and steam superheater, and before assembling the boiler, the safety of these pressure parts is detected, and at this time, a boiler pressure part safety detection device is required.

[0003] In the prior art, as disclosed in the boiler pressure part safety detection device with the announcement number CN214538522U, the outer surface of valve can be fully detected, or the magnetic attraction rod is pressed down relative to the detection plate, at this time, the detection plate and the support seat are magnetically attracted together, the support seat is driven to rotate the detection plate by servo motor, and full detection operation is facilitated, the valve is enlarged by magnifying glass, and the detection accuracy is improved, the prior art scheme has the following shortcomings: when the boiler pressure part safety detection device is used, only the surface is observed by magnifying glass, the internal condition of valve cannot be seen, some small defects on the surface of valve can not be clearly observed, which cannot be found by only surface magnifying glass detection, and simultaneously, when large-scale valve detection work is carried out, detection personnel can need to observe for a long time, and with the lapse of time, the accuracy of observation will decrease. SUMMARY

[0004] The utility model aims at solving the problems that the prior art device only relies on magnifying glass to observe surface, cannot see the internal condition of valve, and some small defects on the surface of valve can not be clearly observed, and provides a boiler pressure part safety inspection equipment.

[0005] The utility model realizes the above-mentioned purpose by the following technical scheme: a boiler pressure part safety inspection equipment, including valve pressure part, the outside of valve pressure part is provided with sealing cover no.1 and sealing cover no.2, valve pressure part is wrapped in the sealing cover no.1 and sealing cover no.2 of forming closed loop, and the outer surface of both ends of sealing cover no.1 and sealing cover no.2 is screw thread connection with screw thread pressure sleeve;

[0006] The side surface of the sealing cover one is integrally formed with a visible cover, the visible cover is internally provided with a cone cover, one end of the cone cover extends into the sealing cover one and is in communication with the sealing cover one, a spoon-shaped rotating part is arranged at the conical port of the cone cover in the visible cover, a fixed rod is rotatably connected to the surface of the center of the spoon-shaped rotating part, and the fixed rod is rotatably connected to the inner wall of the visible cover.

[0007] As a further scheme of the utility model: a one-way exhaust valve is fixedly arranged on the surface of the visible cover, and an airflow buzzer is arranged at the outlet of one end of the one-way exhaust valve.

[0008] As a further scheme of the utility model: a plurality of spiral flow guide grooves are arranged in the cone cover, one end of each of the plurality of spiral flow guide grooves surrounds the central axis of the conical end of the cone cover, and each of the plurality of spiral flow guide grooves is in a spiral expansion mode in the cone cover.

[0009] As a further scheme of the utility model: an airflow sensor is arranged on the surface of the visible cover, and a detection end of the airflow sensor extends to the conical port of the cone cover.

[0010] As a further scheme of the utility model: a sealing strip is attached to the abutting surface of the sealing cover one and the sealing cover two, and a sealing gasket is attached to the inner surface of each of the two ends of the sealing cover one and the sealing cover two.

[0011] As a further scheme of the utility model: a rotating ring is rotatably connected to the outer surface of each of the two threaded press sleeves, a plurality of pull rods are fixedly and uniformly arranged on the side surface of the rotating ring in a ring shape, and the same pull rod is arranged on the same end of each of the plurality of pull rods.

[0012] As a further scheme of the utility model: a conical sealing cone is fixedly arranged on the side surface of the plug plate close to the threaded press sleeve.

[0013] As a further scheme of the utility model: a tracheal connector is arranged on the surface of one of the plug plates, the tracheal connector extends out of the sealing cone on the side surface of the plug plate, and the other end of the tracheal connector is connected to an external air source through a trachea.

[0014] The utility model has the advantages of:

[0015] 1. The utility model discloses a valve pressure bearing, sealing cover no. 1, sealing cover no. 2, sealing strip, visible cover, cone cover, spiral flow guide groove, spoon -shaped rotating part, airflow buzzer, airflow sensor, threaded press sleeve, plug disc and sealing cone etc. Structure's cooperation use, integrated airflow sensor, airflow buzzer and spoon -shaped rotating part multiple detection means, airflow sensor can accurately detect the airflow state at the conical port of cone cover, and all can be acutely captured to the tiny airflow change, and the airflow signal of timely discovery that leaks produces, and airflow buzzer is directly prompted to the operator possible existence's leakage situation through the sound alarm, even when the operator is not close attention sensor data also can know in time, spoon -shaped rotating part is based on physical rotation principle, as long as the weak airflow of leakage gas formation enters the cone cover, can make it rotate, detects the leakage from different angle and principle, supplement each other and verify, significantly improve the accuracy and reliability of detection, effectively reduce the probability of missed detection and misdiagnosis.

[0016] 2. The utility model discloses a variety of detection means to the leakage gas in the sealed space is detected, whether the leakage source is located valve pressure bearing surface or hides in its internal structure, as long as the leakage gas enters the cone cover, can clearly be reflected through airflow sensor, airflow buzzer and spoon -shaped rotating part, realizes all -round, dead -angle -free leakage detection of valve pressure bearing, improves the integrity and reliability of equipment to valve pressure bearing sealing detection comprehensively, ensures the safety of boiler pressure parts to be more comprehensive, in -depth guarantee,

[0017] 3. The utility model discloses a sealing cover no. 1 and sealing cover no. 2 are wrapped valve pressure bearing from two sides to utilize threaded press sleeve even -pressure makes sealing pad close -fitting, formed the preliminary reliable sealing structure, ensure the sealing property of sealed cavity in the detection process, prevent gas from the contact surface of sealing cover and valve pressure bearing leakage, lay a solid foundation for subsequent accurate detection, and drive pull rod to make the conical sealing cone and valve pressure bearing two end passageway mouth close -fitting through the rotation ring of threaded press sleeve outer rotation connection to pull plug disc, further strengthen the sealing of valve pressure bearing two end passageway mouth, the synergies of this double -deck sealing measure, greatly improved the sealing performance of whole detection system, effectively avoided the detection error and misjudgment because of bad sealing, guaranteed the accuracy and reliability of detection result. ACCURACY

[0018] Figure 1 It is the whole structure schematic diagram of the utility model;

[0019] Figure 2 It is the local section structure schematic diagram of the utility model in Figure 1 ;

[0020] Figure 3 It is the structure schematic diagram of plug disc, pull rod and sealing cover no. 1 in the utility model;

[0021] Figure 4 It is the structure schematic view of the sealing strip, the sealing gasket and the sealing cover one in the utility model;

[0022] Figure 5 It is the structure schematic view of the sealing strip, the sealing gasket and the sealing cover one in the utility model;

[0023] Figure 6 It is the structure schematic view of the sealing strip, the sealing gasket and the sealing cover one in the utility model;

[0024] Figure 7 It is the structure schematic view of the sealing strip, the sealing gasket and the sealing cover one in the utility model; Figure 6 It is the structure schematic view of the sealing strip, the sealing gasket and the sealing cover one in the utility model;

[0025] In the figure: 1, valve pressure-bearing part;2, sealing cover one;3, sealing cover two;5, sealing strip;6, sealing gasket;7, visible cover;8, cone cover;9, spiral flow guide groove;10, fixed rod;11, spoon-shaped rotating part;12, one-way exhaust valve;14, airflow buzzer;15, airflow sensor;16, threaded press sleeve;17, rotating ring;18, pull rod;19, plug disc;20, sealing cone;21, air pipe joint. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0027] Embodiment one

[0028] As shown in Figures 1 to 7 A kind of boiler pressure-bearing component safety inspection equipment, including valve pressure-bearing part 1, the outer side of valve pressure-bearing part 1 is provided with sealing cover one 2 and sealing cover two 3, valve pressure-bearing part 1 is wrapped in the sealing cover one 2 and sealing cover two 3 of forming closed loop, the outer surface of both ends of the sealing cover one 2 and sealing cover two 3 of forming closed loop is all connected with threaded press sleeve 16 by screw thread;

[0029] Place the valve pressure-bearing component 1 to be tested on a suitable workbench. Then, remove the sealing cover 1 2 and sealing cover 2 3, ensuring that their interiors are clean and free of foreign objects. Wrap the valve pressure-bearing component 1 with the sealing cover 1 2 and sealing cover 2 3 from both sides, so that the valve pressure-bearing component 1 is completely within the space formed by the sealing cover 1 2 and sealing cover 2 3. Then, screw threaded pressure sleeves 16 into the outer surfaces of both ends of the formed closed-loop sealing cover 1 2 and sealing cover 2 3 respectively. By rotating the threaded pressure sleeves 16, gradually tighten them, and apply pressure evenly to the sealing cover 1 2 and sealing cover 2 3, thereby ensuring that the sealing gasket 6 fits tightly against the valve pressure-bearing component 1, forming a preliminary sealing structure.

[0030] A viewing cover 7 is integrally formed on one side surface of the sealing cover 2. A conical cover 8 is installed inside the viewing cover 7. One end of the conical cover 8 extends into the sealing cover 2 and is connected to the sealing cover 2. A spoon-shaped rotating member 11 is provided inside the viewing cover 7 and at the conical port of the conical cover 8. A fixing rod 10 is rotatably connected to the center of the spoon-shaped rotating member 11. The fixing rod 10 is rotatably connected to the inner wall of the viewing cover 7.

[0031] During testing, operators can also observe the rotation of the spoon-shaped rotating part 11. If the spoon-shaped rotating part 11 starts to rotate without the application of external force, it can also be used to determine that there is a leak in the valve pressure-bearing part 1. This is because the leaked gas will form an airflow after entering the cone shroud 8, causing the spoon-shaped rotating part 11 to rotate. This direct observation allows operators to know the leakage status of the valve pressure-bearing part 1 immediately.

[0032] Furthermore, a one-way exhaust valve 12 is fixedly installed on the surface of the viewing cover 7, and an airflow buzzer 14 is connected to one end of the outlet of the one-way exhaust valve 12.

[0033] If the airflow buzzer 14 sounds, it also indicates that there is a gas leak. This is because as the pressure-bearing component 1 of the valve leaks, the gas in the visible cover 7 is discharged through the one-way exhaust valve 12. If there is a continuous airflow, it will cause the airflow buzzer 14 to sound. The operator can know immediately that there may be a leak problem, so as to take measures quickly and avoid continuing to conduct tests or putting the problematic pressure-bearing component into use without knowing it, thus preventing potential safety accidents.

[0034] Furthermore, the cone shroud 8 has multiple spiral guide grooves 9 inside, one end of each spiral guide groove 9 is around the central axis of the cone end of the cone shroud 8, and the multiple spiral guide grooves 9 are spirally expanded inside the cone shroud 8.

[0035] A plurality of spiral guide grooves 9 are distributed around the central axis of the conical end of the cone cover 8, so that the gas leaked into the cone cover 8 from different directions can be effectively guided. For tiny leaks, the flow direction of the leaked gas can be random. The spiral guide grooves 9 can converge and guide these weak gas flows in different directions into relatively stable spiral flows, which helps to reduce detection errors caused by uncertain gas flow directions. The spiral guide grooves 9 can integrate the gas generated by these tiny leaks, making it easier for the spoon-shaped rotating part 11 to make correct judgments on the leakage, and improving the accuracy of detection.

[0036] Further, the surface of the visible cover 7 is provided with an air flow sensor 15, and the detection end of the air flow sensor 15 extends to the conical port of the cone cover 8.

[0037] The gas source gradually increases the gas pressure in the valve pressure-bearing part 1 to a predetermined detection pressure value through the air pipe, and then observes the data of the air flow sensor 15. If the air flow sensor 15 detects that there is a continuous air flow through the conical port of the cone cover 8, it indicates that the valve pressure-bearing part 1 has a leak. If the valve pressure-bearing part 1 leaks, the gas will enter the sealing cavities of the sealing cover one 2 and the sealing cover two 3 through the leak, and then be introduced into the visible cover 7 through the cone cover 8. The detection end of the air flow sensor 15 extends to the conical port of the cone cover 8, which can detect the air flow state of the conical port of the cone cover 8 in time.

[0038] Example two

[0039] Based on the improvement of example one:

[0040] As shown in Figures 1 to 7 , the sealing strip 5 is bonded at the abutting surface of the sealing cover one 2 and the sealing cover two 3, and the sealing gasket 6 is bonded at the inner surface of both ends of the sealing cover one 2 and the sealing cover two 3.

[0041] Avoiding gas leakage, improving the sealing effect of the connection, and then improving the accuracy of the detection structure;

[0042] Further, the outer surfaces of the two threaded sleeves 16 are rotatably connected with rotating rings 17. The side surface of each rotating ring 17 is fixedly connected with a plurality of pull rods 18 in a ring shape. The same end of each of the plurality of pull rods 18 is provided with the same plug disc 19. The side surface of the plug disc 19 close to the threaded sleeve 16 is fixedly provided with a conical sealing cone 20.

[0043] The two groups of pull rods 18 pull the plug disc 19 to approach the threaded sleeve 16, until the conical sealing cone 20 on the plug disc 19 tightly abuts the two end passage openings of the valve pressure-bearing part 1, preventing gas from leaking from the two end passage openings of the valve pressure-bearing part 1.

[0044] Further, the surface of one of the blocking discs 19 is provided with a gas pipe joint 21, one end of which extends out of the sealing cone 20 provided on one side surface of the blocking disc 19, and the other end of which is connected to an external gas source through a gas pipe.

[0045] The gas pipe joint 21 is connected to the output end of the external gas source (constant pressure gas pump) through a gas pipe, and the external gas source is caused to gradually increase the gas pressure in the valve pressure-bearing member 1 to a predetermined detection pressure value, so as to facilitate detection of the sealing effect of the valve pressure-bearing member 1.

[0046] Working principle: in use, first, the valve pressure-bearing member 1 to be detected is placed on a suitable workbench, then the sealing cover one 2 and the sealing cover two 3 are taken out, and it is ensured that the interiors are clean and free of foreign matter, the sealing cover one 2 and the sealing cover two 3 are wrapped around the valve pressure-bearing member 1 from both sides, so that the valve pressure-bearing member 1 is completely in the space formed by the sealing cover one 2 and the sealing cover two 3, then the threaded sleeves 16 are screwed into the outer surfaces of the two ends of the sealing cover one 2 and the sealing cover two 3, and the threaded sleeves 16 are gradually tightened to uniformly apply pressure to the sealing cover one 2 and the sealing cover two 3, so as to ensure that the sealing gasket 6 tightly fits the valve pressure-bearing member 1, forming a preliminary sealing structure;

[0047] When the two threaded sleeves 16 are respectively rotated on the outer surfaces of the two ends of the sealing cover one 2 and the sealing cover two 3, the rotating rings 17 rotatably connected to the outer surfaces of the threaded sleeves 16 can drive the multiple evenly distributed pull rods 18 to move synchronously, causing the two groups of pull rods 18 to pull the blocking disc 19 to move closer to the threaded sleeves 16, until the conical sealing cone 20 on the blocking disc 19 tightly fits the passage openings at the two ends of the valve pressure-bearing member 1, preventing gas from leaking from the passage openings at the two ends of the valve pressure-bearing member 1;

[0048] Then, the gas pipe joint 21 is connected to the output end of the external gas source (constant pressure gas pump) through a gas pipe, and the external gas source is caused to gradually increase the gas pressure in the valve pressure-bearing member 1 to a predetermined detection pressure value, and then the data of the airflow sensor 15 is observed, if the airflow sensor 15 detects that there is a continuous airflow through the conical port of the cone cover 8, it indicates that the valve pressure-bearing member 1 has a leak, if the valve pressure-bearing member 1 has a leak, gas will enter the sealing cavity of the sealing cover one 2 and the sealing cover two 3 through the leak, and then be introduced into the visible cover 7 through the cone cover 8, and the detection end of the airflow sensor 15 extends to the conical port of the cone cover 8, so as to timely detect the airflow state of the conical port of the cone cover 8;

[0049] Meanwhile, attention is paid to the sound of the airflow buzzer 14, and if the airflow buzzer 14 makes a sound, it also indicates that there is a gas leakage, because as the valve pressure-bearing part 1 leaks, the gas in the visible cover 7 is discharged through the one-way exhaust valve 12, and if there is continuous airflow discharge, the airflow buzzer 14 will sound, and the operator can know that there may be a leakage problem at the first time, so that measures can be taken quickly to prevent the problem pressure-bearing part from being put into use without knowing, and prevent potential safety accidents from occurring;

[0050] The operator can also observe the rotation of the spoon-shaped rotating part 11, and if the spoon-shaped rotating part 11 starts to rotate without external force, it can also be used as a judgment that the valve pressure-bearing part 1 has a leakage, because the leaked gas enters the conical cover 8 to form airflow, which makes the spoon-shaped rotating part 11 rotate;

[0051] If the airflow sensor 15 does not detect abnormal airflow, the airflow buzzer 14 does not sound, and the spoon-shaped rotating part 11 does not rotate during the detection process, it is judged that the valve pressure-bearing part 1 has good sealing performance;

[0052] It should be noted that the airflow buzzer 14 is a device driven by airflow to make sound, and its working principle is mainly based on air vibration sound. When there is airflow through the specific structure inside the airflow buzzer 14, the vibration parts (such as diaphragm or reed) will vibrate, and these vibration parts will vibrate at a certain frequency under the action of airflow, so that the surrounding air changes in density, forming sound waves and making sound.

[0053] It should be noted that the airflow sensor 15 uses a capacitive airflow sensor to detect airflow based on capacitance changes. It is mainly composed of two electrodes with a certain gap between the electrodes. When there is no airflow, the capacitance value is a fixed value determined by the area, spacing and medium between the electrodes. When there is airflow, the airflow will change the medium distribution or spacing between the electrodes, resulting in a change in capacitance value.

[0054] It is obvious to those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be considered as limiting the claims involved.

[0055] Furthermore, it should be understood that although the specification is described in terms of embodiments, not every embodiment includes every feature described. The specification can include implicit combinations of explicitly mentioned features and / or explicit combinations of implicitely mentioned features. Each embodiment depends on the explicit combinations of features and / or the implicit combinations of features made specifically within that embodiment, and each such embodiment can be combined with every other such embodiment to create further embodiments.

Claims

1. A boiler pressure part safety inspection apparatus comprising a valve pressure part (1), characterized by: The outer side of the valve pressure bearing (1) is provided with a sealing cover one (2) and a sealing cover two (3), the valve pressure bearing (1) is wrapped in the sealing cover one (2) and the sealing cover two (3) of the closed loop, the outer surface of the two ends of the sealing cover one (2) and the sealing cover two (3) of the closed loop are threadedly connected with threaded pressure sleeves (16); The sealing cover one (2) is integrally formed with a visible cover (7) on one side surface, a cone cover (8) is installed in the visible cover (7), one end of the cone cover (8) extends into the sealing cover one (2) and communicates with the sealing cover one (2), a spoon-shaped rotating part (11) is arranged in the visible cover (7) and located at the tapered port of the cone cover (8), a fixed rod (10) is rotatably connected to the surface of the center position of the spoon-shaped rotating part (11), and the fixed rod (10) is rotatably connected to the inner wall of the visible cover (7).

2. The boiler pressure part safety inspection apparatus according to claim 1, characterized by: A one-way exhaust valve (12) is fixedly installed on the surface of the visible cover (7), and an airflow buzzer (14) is communicated with the outlet of one end of the one-way exhaust valve (12).

3. The boiler pressure part safety inspection apparatus according to claim 1, characterized by: A plurality of spiral flow guide grooves (9) are arranged in the cone cover (8), one end of each of the plurality of spiral flow guide grooves (9) surrounds the central axis of the tapered end of the cone cover (8), and each of the plurality of spiral flow guide grooves (9) is in a spiral expansion mode in the cone cover (8).

4. The boiler pressure part safety inspection apparatus according to claim 1, characterized by: An airflow sensor (15) is installed on the surface of the visible cover (7), and a detection end of the airflow sensor (15) extends to the tapered port of the cone cover (8).

5. The boiler pressure part safety inspection apparatus according to claim 1, characterized by: A sealing strip (5) is bonded to the abutting surface of the sealing cover one (2) and the sealing cover two (3), and a sealing gasket (6) is bonded to the inner surface of the two ends of the sealing cover one (2) and the sealing cover two (3).

6. The boiler pressure part safety inspection apparatus according to claim 1, characterized by: The outer surfaces of the two threaded pressure sleeves (16) are rotatably connected with rotating rings (17), a plurality of pull rods (18) are fixedly and uniformly connected to the side surface of each rotating ring (17), and the same end of each of the plurality of pull rods (18) is provided with the same plug disc (19).

7. A boiler pressure part safety examination apparatus according to claim 6, characterized in that: A conical sealing cone (20) is fixedly installed on the side surface of the plug disc (19) close to the threaded pressure sleeve (16).

8. A boiler pressure part safety inspection apparatus according to claim 7, characterized in that: A tracheal connector (21) is installed on the surface of one of the plug discs (19), one end of the tracheal connector (21) extends out of the sealing cone (20) on the side surface of the plug disc (19), and the other end of the tracheal connector (21) is connected with an external air source through an air pipe.

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