CN219391257U

CN219391257U - Boiler pressure vessel leakage detection device

Info

Publication number: CN219391257U
Application number: CN202222655132.0U
Authority: CN
Inventors: 赵波; 魏学玲; 李超; 韩楠; 侯淼昂
Original assignee: Xian Special Equipment Inspection and Testing Institute
Current assignee: Xian Special Equipment Inspection and Testing Institute
Priority date: 2022-10-09
Filing date: 2022-10-09
Publication date: 2023-07-21
Anticipated expiration: 2032-10-09

Abstract

The utility model discloses a boiler pressure vessel leakage detection device, which comprises a pressure vessel body with a cylindrical structure and also comprises a detection support with a U-shaped structure, wherein the upper end of the detection support is provided with a support assembly, the outer side of the detection support is fixedly provided with a motor, the output end of the motor penetrates through the detection support and is fixedly connected with a contact plate, the inner walls of the two sides of the detection support are rotatably connected with rotating rods, the opposite ends of the two rotating rods are fixedly connected with reciprocating screw rods, and the output ends of the rotating rods and the motor are connected with a gear pair. According to the utility model, after the pressure container body is supported by using the supporting component and the sealing cap is successfully abutted with the air inlet end, the motor drives the pressure container body to rotate through the contact plate, and meanwhile, the gear pair drives the sliding plate and the helium detector to detect whether helium leakage exists on the outer surface of the pressure container body, so that a detection mode of manually holding the suction gun is replaced, the condition of missing detection is avoided, the detection efficiency is higher, and the labor amount is reduced.

Description

Boiler pressure vessel leakage detection device

Technical Field

The utility model relates to the technical field of pressure vessel detection, in particular to a boiler pressure vessel leakage detection device.

Background

The boiler pressure vessel needs to be subjected to leakage detection before leaving the factory so as to ensure that leakage cannot occur when certain pressure is reached in the boiler pressure vessel, and ensure use safety. Leak tests include gas tightness tests, ammonia leak tests, halogen leak tests, and helium leak tests. Wherein the operation is troublesome in performing helium leak detection tests. The detection standard of the helium positive pressure method mainly comprises a helium mass spectrum positive pressure leakage detection method (QJ 3089-1999) and a pressure container welding seam helium mass spectrum suction gun cover box leakage detection test method (QJ 2862-1996). When the helium positive pressure method is adopted, helium with the pressure higher than the atmospheric pressure is filled into the pressure container to be detected, once the pressure container is cracked, helium overflows into the atmosphere through the crack, so that helium leakage measurement is realized, and then the helium concentration increment around the pressure container is detected by the suction gun method, and the outer surface of a detected product is scanned and probed by the positive pressure suction gun method by adopting the suction gun, so that accurate positioning of a leakage part can be realized.

The whole body of the existing boiler pressure vessel is generally fixed and sealed by adopting a welding process, the key point of leakage detection is a welding part, the existing method is that technicians hold and move the suction gun to scan and check the whole body, the condition of leakage detection is caused by unstable holding, the detection efficiency of manually moving the suction gun is low, and the labor capacity is high.

To this end, we propose a boiler pressure vessel leak detection apparatus to solve the above problems.

Disclosure of Invention

The utility model aims to provide a boiler pressure vessel leakage detection device to solve the defects of low detection efficiency and large labor capacity caused by the condition of missed detection due to unstable handholding in the prior art.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the utility model provides a boiler pressure vessel leak detection device, includes the pressure vessel body of cylindrical structure, still includes the detection support of U type structure, the upper end of detection support is provided with supporting component, the outside fixed mounting of detection support has the motor, the output of motor runs through detection support and fixedly connected with contact plate, the both sides inner wall rotation of detection support is connected with the dwang, two the relative one end fixedly connected with reciprocating screw rod of dwang, the dwang is connected with the gear pair with the output of motor, the cover is equipped with the slide rather than complex on the reciprocating screw rod, the lower extreme and the detection support sliding connection of slide are close to one side fixed mounting of pressure vessel body have helium detector, the right-hand member of pressure vessel body has the air inlet, the right-hand member fixed mounting of detection support has No. two telescopic devices, the telescopic end of No. two telescopic devices runs through the detection support setting, the outer peripheral face evenly fixedly connected with a plurality of L type structures's connecting rod, a plurality of the other end of connecting rod is fixedly connected with annular slab jointly, the opposite side of annular slab is through rotary seal cap, the annular slab's opposite side has the sealed cap, the sealed cap has the sealed tube of sealed tube, sealed tube has the sealed tube is kept away from to the sealed tube, sealed tube has the sealed tube is connected with in the sealed tube.

Preferably, the supporting component comprises a first telescopic device fixedly arranged at the inner bottom end of the detection support, the telescopic end of the first telescopic device is fixedly connected with a supporting plate of an arc-shaped structure, and a plurality of rolling rods are uniformly arranged on the inner surface of the supporting plate in a rolling mode.

Preferably, the gear pair comprises two gears which are meshed with each other but are coaxially and fixedly sleeved at the output ends of the reciprocating screw rod and the motor respectively.

Preferably, the axis of the motor output end coincides with the axis of the pressure vessel body.

Preferably, the length of the multifilament feed rod is greater than the length of the pressure vessel body.

Preferably, the air inlet end is matched with the shape of the sealing cap, and the air inlet end is connected with the sealing cap in an airtight manner through a sealing ring.

Compared with the prior art, the utility model has the beneficial effects that:

according to the utility model, after the pressure container body is supported by using the supporting component and the sealing cap is successfully abutted with the air inlet end, the motor drives the pressure container body to rotate through the contact plate, and meanwhile, the gear pair drives the sliding plate and the helium detector to detect whether helium leakage exists on the outer surface of the pressure container body, so that a detection mode of manually holding the suction gun is replaced, the condition of missing detection is avoided, the detection efficiency is higher, and the labor amount is reduced.

Drawings

FIG. 1 is a sectional view showing the structure of a boiler pressure vessel leak detection apparatus according to the present utility model in a top view;

fig. 2 is an enlarged schematic view of the structure at a in fig. 1.

In the figure: the pressure vessel comprises a pressure vessel body 1, a detection support 2, a support plate 3, a rolling rod 4, a motor 5, a contact plate 6, a second telescopic device 7, a connecting rod 8, an annular plate 9, a rotary seal 10, a seal cap 11, a seal ring 12, an inflation tube 13, a reciprocating screw rod 14, a gear pair 15, a sliding plate 16 and a helium detector 17.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

Referring to fig. 1-2, a boiler pressure vessel leakage detecting device comprises a pressure vessel body 1 with a cylindrical structure, and further comprises a detecting support 2 with a U-shaped structure, wherein a supporting component is arranged at the upper end of the detecting support 2, and the pressure vessel body 1 is supported by the supporting component, so that the stability of a subsequent rotation process is improved.

The supporting component is including fixed setting up the flexible equipment of No. one in the interior bottom that detects support 2, the flexible end fixedly connected with arc structure's of flexible equipment backup pad 3, and a plurality of dwang 4 are installed in the even roll of internal surface of backup pad 3, through the vertical height of the adjustable backup pad 3 of flexible equipment of No. one, and pressure vessel body l is placed in relative lower position to backup pad 3, and backup pad 3 leak detection in relative higher position, pressure vessel body l and 4 rolling contact of dwang in order to improve rotation stability.

The outside fixed mounting who detects support 2 has motor 5, and the axis of motor 5 output and the axis coincidence of pressure vessel body 1, and motor 5 is low-speed rotating electrical machines, and the model is various on the market, and is not exemplified here, and motor 5 is for providing the power that pressure vessel body 1 rotated.

The output end of the motor 5 penetrates through the detection support 2 and is fixedly connected with the contact plate 6, the inner walls of the two sides of the detection support 2 are rotationally connected with rotating rods, one ends of the two rotating rods opposite to each other are fixedly connected with a reciprocating screw rod 14, the length of the reciprocating screw rod 14 is larger than that of the pressure container body 1, the output ends of the rotating rods and the motor 5 are connected with a gear pair 15, and the gear pair 15 comprises two gears which are meshed with each other and are respectively coaxially and fixedly sleeved on the output ends of the reciprocating screw rod 14 and the motor 5.

The reciprocating screw rod 14 is sleeved with a sliding plate 16 matched with the reciprocating screw rod, the lower end of the sliding plate 16 is in sliding connection with the detection support 2, a helium detector 17 is fixedly arranged on one side, close to the pressure container body 1, of the sliding plate 16, and the helium detector 17 is provided with a suction gun, which is the prior art.

The right-hand member of pressure vessel body 1 has the inlet end, the right-hand member fixed mounting of detection support 2 has No. two telescopic devices 7, the telescopic ends of No. two telescopic devices 7 run through detection support 2 and set up, the even fixedly connected with of outer peripheral face of telescopic ends a plurality of L type structures's connecting rod 8, form the annular space between a plurality of connecting rods 8, provide the activity space of gas tube 13, the common fixedly connected with annular slab 9 of the other end of a plurality of connecting rods 8, the opposite side of annular slab 9 is through rotary seal 10 rotation connection has sealing cap 11, through setting up rotary seal 10, rotary seal 10 is prior art, do not influence the rotation of pressure vessel body 1, and do not influence sealing cap 11 and annular slab 9's sealing, have the air inlet that link up and set up in the sealing cap 11, the inner wall bonding fixedly connected with sealing ring 12 of sealing cap 11, the inlet end matches with sealing cap 11 shape, the inlet end is airtight connection with sealing cap 11 through sealing ring 12, one side sealing connection that the sealing cap 11 is kept away from to annular slab 9, the gas tube 13's the other end is connected with helium source, the helium source is liquid helium source.

When the utility model is used, the supporting component is used for lifting the pressure container body 1 to the position of the output end axis of the motor 5, the second telescopic device 7 pushes the connecting rod 8, the annular plate 9, the rotary seal 10 and the sealing cap 11 to move so that the air inlet end enters the sealing cap 11, airtight connection is realized through the sealing ring 12 which is in contact with the air inlet end, the valve is opened so that helium gas sequentially passes through the inflation tube 13, the annular plate 9, the rotary seal 10, the air inlet and the air inlet end to enter the pressure container body 1, in the process, the motor 5 drives the pressure container body 1 and the sealing cap 11 to synchronously rotate through the contact plate 6, meanwhile, the gear pair 15 drives the rotating rod and the reciprocating screw rod 14 to rotate, in the rotating process of the pressure container body 1, the helium detector 17 reciprocates to linearly, so that leakage detection can be carried out on the whole body of the pressure container body 1, a detection mode of a manual holding suction gun is replaced, the condition of omission is avoided, the detection efficiency is higher, and the labor is reduced.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims

1. The utility model provides a boiler pressure vessel leak detection device, includes pressure vessel body (1) of cylindrical structure, its characterized in that: the device also comprises a detection bracket (2) with a U-shaped structure, wherein the upper end of the detection bracket (2) is provided with a supporting component, the outer side of the detection bracket (2) is fixedly provided with a motor (5), the output end of the motor (5) penetrates through the detection bracket (2) and is fixedly connected with a contact plate (6), the inner walls of the two sides of the detection bracket (2) are rotationally connected with rotating rods, two opposite ends of the rotating rods are fixedly connected with a reciprocating screw rod (14), the rotating rods are connected with the output end of the motor (5) through a gear pair (15), the reciprocating screw rod (14) is sleeved with a sliding plate (16) matched with the rotating rod, the lower end of the sliding plate (16) is in sliding connection with the detection bracket (2), one side of the sliding plate (16) close to a pressure vessel body (1) is fixedly provided with a helium detector (17), the right end of the pressure vessel body (1) is provided with an air inlet end, the right end of the detection bracket (2) is fixedly provided with a second telescopic device (7), the telescopic ends of the second telescopic device (7) penetrate through the detection bracket (2), the other ends of the second telescopic device (7) are uniformly arranged with a plurality of annular sealing plates (8) and are fixedly connected with annular sealing plates (9) through the other sides of the annular sealing plates (9), the sealing cap (11) is internally provided with a through air inlet, the inner wall of the sealing cap (11) is fixedly connected with a sealing ring (12) in an adhering mode, one side, far away from the sealing cap (11), of the annular plate (9) is hermetically connected with an inflation tube (13), and the other end of the inflation tube (13) is connected with a helium source.

2. A boiler pressure vessel leak detection apparatus as defined in claim 1, wherein: the support assembly comprises a first telescopic device fixedly arranged at the inner bottom end of the detection support (2), the telescopic end of the first telescopic device is fixedly connected with a support plate (3) of an arc-shaped structure, and a plurality of rolling rods (4) are uniformly arranged on the inner surface of the support plate (3) in a rolling mode.

3. A boiler pressure vessel leak detection apparatus as defined in claim 1, wherein: the gear pair (15) comprises two gears which are meshed with each other but are respectively and coaxially fixedly sleeved at the output ends of the reciprocating screw rod (14) and the motor (5).

4. A boiler pressure vessel leak detection apparatus as defined in claim 1, wherein: the axis of the output end of the motor (5) coincides with the axis of the pressure vessel body (1).

5. A boiler pressure vessel leak detection apparatus as defined in claim 1, wherein: the length of the reciprocating screw rod (14) is longer than that of the pressure container body (1).

6. A boiler pressure vessel leak detection apparatus as defined in claim 1, wherein: the air inlet end is matched with the sealing cap (11) in shape, and the air inlet end is connected with the sealing cap (11) in an airtight manner through a sealing ring (12).