CN210953252U

CN210953252U - Simple low pressure boiler tube leak hunting appurtenance

Info

Publication number: CN210953252U
Application number: CN201922292644.3U
Authority: CN
Inventors: 钱力
Original assignee: Aitwei Zhangjiagang Semiconductor Technology Co ltd
Current assignee: Aitwei Zhangjiagang Semiconductor Technology Co ltd
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2020-07-07
Anticipated expiration: 2029-12-19

Abstract

The utility model belongs to the technical field of low pressure boiler tube leak hunting equipment, especially, relate to a simple low pressure boiler tube leak hunting appurtenance, including the end cap, the connecting piece, setting element and sealing washer, the end cap is including fixed connection's installation department and spacing portion in proper order, setting element and sealing washer all overlap and establish on the installation department, it holds the chamber to run through on the connecting piece, the connecting piece is established on the installation department through holding the chamber cover, the tip and the contact of spacing portion of connecting piece, it is close to the one end of spacing portion and inwards extends to hold the chamber to have a spacing flange, setting element and sealing washer all are located and hold the intracavity, and the sealing washer, the setting element, spacing flange and spacing portion set gradually, it is. Has the advantages that: the utility model discloses a simple low pressure boiler tube leak hunting appurtenance, simple structure, convenient to use does not need additionally to purchase the leak hunting instrument, only needs supplementary current vacuum pump leak hunting just by oneself, can solve the problem of common leak rate fast, low cost, and portable.

Description

Simple low pressure boiler tube leak hunting appurtenance

Technical Field

The utility model belongs to the technical field of low pressure boiler tube leak hunting equipment, especially, relate to a simple low pressure boiler tube leak hunting appurtenance.

Background

The low-pressure furnace tube has the difficulty that the leakage rate is not good, so that the product is often abnormal, and the product is seriously even scrapped.

First, two terms, ultimate vacuum and background leak rate, will be described. The complete name of the ultimate vacuum is ultimate vacuum degree, which refers to the maximum vacuum degree which can be reached by the micro vacuum pump. For example, a micro vacuum pump with a weak pumping capacity can only reduce the gas pressure in the closed container from the normal 100KPa to 80KPa after an indefinite period of time, and thus 80KPa is the ultimate vacuum degree of the micro vacuum pump.

Generally, ultimate vacuum can directly reflect whether equipment leaks greatly or not, but microleakage is often not reacted by ultimate vacuum, so that background leak rate is introduced, and the background leak rate can be simply understood as a difference value generated by pressure within a certain time under the condition of ultimate vacuum. For example, the ultimate vacuum of the equipment is 10Pa, the micro vacuum pump is closed, the pressure in the equipment becomes 12Pa within 60S, and then 2Pa is the background leakage rate of the equipment 60S.

Due to the inherent characteristics and the process of equipment, the low-pressure furnace tube can be periodically disassembled from the furnace opening flange and the quartz piece for maintenance. The equipment leakage rate is not good when the equipment is installed slightly out of place after being disassembled. And the improper installation of the quartz piece at the furnace opening flange is a common reason for the excessive leakage rate of the equipment. The conventional method comprises the steps of fastening a furnace mouth flange and a quartz piece, then reusing the existing vacuum pump to perform leak detection test on equipment, if helium detection is not performed, helium detection can be performed effectively to detect micro-leakage, however, the helium detector is heavy in shape and needs helium gas support, most importantly, the price is high, and the method is expensive, time-consuming and labor-consuming.

SUMMERY OF THE UTILITY MODEL

For solving the problem that the leak detection equipment for high-low pressure boiler tube that prior art exists leak hunting inefficiency and expensive, the utility model provides a simple low pressure boiler tube leak hunting appurtenance.

For solving the technical problem, the utility model discloses the technical scheme who adopts as follows, a simple low pressure boiler tube leak hunting appurtenance, including end cap, connecting piece, setting element and sealing washer, the end cap is including fixed connection's installation department and spacing portion in proper order, setting element and the equal cover of sealing washer are established on the installation department, it holds the chamber to run through on the connecting piece, the connecting piece passes through hold the chamber cover and establish on the installation department, the tip and the spacing contact of portion of connecting piece, it is close to the one end of spacing portion and inwards extends to have a spacing flange to hold the chamber, setting element and sealing washer all are located and hold the intracavity, just sealing washer, setting element, spacing flange and spacing portion set gradually, it attacks and is equipped with connecting thread to hold the one end that spacing portion was kept away from.

Preferably, the outer circumferential surface of the connecting piece is carved with anti-skid lines. The connecting piece is convenient to assemble.

Further, the installing port that communicates with the external world has on the fire door flange of low pressure boiler tube, the axis of installing port is towards the horizontal direction, spacing annular has been seted up to the tip of installing port, in the spacing annular was gone into to the sealing washer card, the installation department is fixed to be set up in the installing port, the external screw thread has on the installing port, the connecting piece passes through connecting thread with external screw thread cooperation and installing port fixed connection. The installing port of seting up on the conventional furnace mouth flange has profile tc installing port, special gas installing port, nitrogen gas installing port and exhaust emission, during the leak hunting, except that the nitrogen gas installing port (the effect of nitrogen gas installing port is daily logical nitrogen gas, and lead to the broken vacuum of nitrogen gas, let equipment get back to atmospheric condition from the vacuum state), with profile tc installing port, special gas installing port and exhaust emission seal in proper order, the leak source is confirmed to the background leak rate of the current vacuum pump limit vacuum of rethread and unit interval, this leak hunting appurtenance convenient to use, need not additionally purchase the leak hunting instrument, only need supplementary current vacuum pump leak hunting by oneself go, can solve common leak rate problem not fast, therefore, the carrier wave prepaid electric energy meter is low in cost, the processing assembly of being convenient for, and convenient for carry.

Has the advantages that: the simple low-pressure furnace tube leak detection auxiliary tool is convenient to use, does not need to additionally purchase a leak detection instrument, only needs to assist the conventional vacuum pump to automatically leak the leak, and can quickly solve the problem that the common leak rate is not excessive; the simple low-pressure furnace tube leak detection auxiliary tool has the advantages of simple structure, low cost and low processing difficulty, and can be used by companies and individuals; the utility model discloses a simple low pressure boiler tube leak hunting appurtenance, the appearance is small and exquisite, conveniently carries, is particularly suitable for the personnel of often going out debugging equipment.

Drawings

FIG. 1 is a schematic perspective view of a simple auxiliary tool for leak detection of low-pressure furnace tubes according to the present invention;

FIG. 2 is an exploded view of the simple low pressure furnace tube leak detection aid of the present invention;

FIG. 3 is a schematic cross-sectional view of a simple low-pressure furnace tube leak detection aid of the present invention;

FIG. 4 is an enlarged partial schematic view of A in FIG. 3;

in the figure: 1. the anti-skid device comprises a plug, 11, an installation part, 12, a limiting part, 2, a connecting piece, 21, an accommodating cavity, 22, a limiting flange, 23, anti-skid grains, 3, a positioning piece, 4, a sealing ring, 5, an installation opening, 51 and a limiting ring groove.

Detailed Description

Examples

As shown in FIGS. 1 to 4, a simple auxiliary tool for leak detection of a low-pressure furnace tube comprises a plug 1, a connecting piece 2, a positioning piece 3 and a sealing ring 4, the plug 1 comprises an installation part 11 and a limiting part 12 which are fixedly connected in sequence, the positioning piece 3 and the sealing ring 4 are sleeved on the installation part 11, an accommodating cavity 21 penetrates through the connecting piece 2, the connecting piece 2 is sleeved on the mounting part 11 through the accommodating cavity 21, the end part of the connecting piece 2 is contacted with the limiting part 12, one end of the accommodating cavity 21 close to the limiting part 12 extends inwards to form a limiting flange 22, the positioning piece 3 and the sealing ring 4 are both positioned in the accommodating cavity 21, the sealing ring 4, the positioning piece 3, the limiting flange 22 and the limiting part 12 are sequentially arranged, connecting threads are tapped at one end of the accommodating cavity 21, which is far away from the limiting part 12, and anti-skid grains 23 are carved on the outer peripheral surface of the connecting piece 2;

as shown in fig. 3 and 4, the installing port 5 that communicates with the external world has on the fire door flange of low pressure boiler tube, the axis of installing port 5 is towards the horizontal direction, spacing annular 51 has been seted up to the tip of installing port 5, in spacing annular 51 was gone into to sealing washer 4 card, installation department 11 is fixed to be set up in installing port 5, the external screw thread has on the installing port 5, connecting piece 2 passes through connecting thread with external screw thread fit and installing port 5 fixed connection.

The installing port 5 of seting up on the conventional furnace mouth flange has profile tc installing port 5, special gas installing port 5, nitrogen gas installing port 5 and exhaust vent, during the leak hunting, except that nitrogen gas installing port 5 (the effect of nitrogen gas installing port 5 is to lead to nitrogen gas daily, and lead to the broken vacuum of nitrogen gas, let equipment get back to atmospheric condition from the vacuum state), with profile tc installing port 5, special gas installing port 5 and exhaust vent seal in proper order, the back leak is confirmed to the background leak rate of the extreme vacuum of rethread current vacuum pump and unit interval, this leak hunting appurtenance convenient to use, do not need additionally to purchase the leak hunting instrument, only need supplementary current vacuum pump leak hunting certainly just, can solve the problem that common leak rate is not.

The working principle is as follows:

firstly, the connecting piece 2, the positioning piece 3 and the sealing ring 4 are sequentially sleeved on the mounting part 11, the positioning piece 3 and the sealing ring 4 are both positioned in the accommodating cavity 21, the sealing ring 4, the positioning piece 3, the limiting flange 22 and the limiting part 12 are sequentially arranged, the end part of the connecting piece 2 is contacted with the limiting part 12, then the mounting part 11 is inserted into the corresponding mounting opening 5, at the moment, the sealing ring 4 is clamped into the limiting ring groove 51, the connecting piece 2 is fixedly connected with the mounting port 5 through threads by matching of connecting threads and external threads, the sealing installation that the mounting port 5 is blocked by the auxiliary leakage detection tool is completed, the actions are repeated to block the mounting port 5 corresponding to the pipeline which possibly has no problem in the furnace port flange for sealing by the auxiliary leakage detection tool, the existing vacuum pump is sequentially used for inspecting the pipeline suspected of leakage, and the mounting port 5 corresponding to the pipeline suspected of leakage is normally connected with the pipeline. Because the mounting ports 5 (air inlet holes and air outlet holes) communicated with the outside on the furnace mouth flange are less, pipelines which are seriously suspected can be detected in practical application, and other pipelines are sealed by the auxiliary leakage detection tool, so that the leaked pipelines can be found out quickly and conveniently.

Claims

1. The utility model provides a simple low pressure boiler tube leak hunting appurtenance which characterized in that: comprises a plug (1), a connecting piece (2), a positioning piece (3) and a sealing ring (4), the plug (1) comprises an installation part (11) and a limiting part (12) which are fixedly connected in sequence, the positioning piece (3) and the sealing ring (4) are sleeved on the mounting part (11), an accommodating cavity (21) penetrates through the connecting piece (2), the connecting piece (2) is sleeved on the mounting part (11) through the accommodating cavity (21), the end part of the connecting piece (2) is contacted with the limiting part (12), one end of the accommodating cavity (21) close to the limiting part (12) extends inwards to form a limiting flange (22), the positioning piece (3) and the sealing ring (4) are both positioned in the containing cavity (21), and the sealing ring (4), the positioning piece (3), the limit flange (22) and the limit part (12) are arranged in sequence, and one end of the accommodating cavity (21) far away from the limiting part (12) is provided with connecting threads.

2. The simple low pressure furnace tube leak detection aid of claim 1, wherein: the outer peripheral surface of the connecting piece (2) is carved with anti-skid lines (23).

3. A simple low pressure furnace tube leak detection aid as claimed in claim 1 or claim 2, wherein: have installing port (5) with external intercommunication on the fire door flange of low pressure boiler tube, the axis of installing port (5) is towards the horizontal direction, spacing annular (51) have been seted up to the tip of installing port (5), in spacing annular (51) was gone into to sealing washer (4) card, installation department (11) are fixed to be set up in installing port (5), the external screw thread has on installing port (5), connecting piece (2) are passed through connecting thread with external screw thread cooperation and installing port (5) fixed connection.