Elliptical limited space ventilation pipeline

Abstract

The utility model discloses an oval limited space ventilation pipeline, and relates to the technical field of limited space operation. A plurality of oval steel wire keels are embedded in the oval air pipe. A sampling pipe connector is arranged in the middle of the annular side of each oval steel wire keel, and a universal bamboo joint pipe is arranged at the tail end. A sampling tube is arranged at the sampling tube interface, and a plurality of pieces of label paper are adhered to the sampling tube. And the label paper is provided with a quick connector matched with the sampling tube connector. The air pipe supported by the oval keel is adopted, under the same ventilation cross section, the flat and long shape of the air pipe reduces occupied space, operators are not interfered in entering and exiting, and the problems that an entrance and an exit in a limited space are narrow, and the operators are difficult to enter and exit due to the fact that a round ventilation pipeline occupies the space of the entrance and the exit are effectively solved. Meanwhile, the sampling pipe connector is arranged on the ventilation pipeline, so that pump suction type gas sampling is facilitated, ventilation is effectively guaranteed, implementation of safety protection measures for detection is effectively guaranteed, and the operation safety is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a limited space operation technical field especially relates to an oval limited space ventilation pipeline. BACKGROUND

[0002] Limited space refers to the closed or partially closed, import and export limited but personnel can enter, not designed as a fixed work place, poor ventilation, easy to cause toxic and harmful, flammable and explosive material accumulation or oxygen content insufficient space. Limited space as a common work place, various forms and widely exist in public facilities management industry, power, heat, gas and water production and supply industry, manufacturing industry, construction industry, service industry, property management industry, accommodation and catering industry and many other industries. At the same time, it is a special work place, the general environment is relatively small, the work environment is poor ventilation, easy to cause toxic and harmful, flammable and explosive material accumulation or oxygen content insufficient. Whether it is limited space routine operation or emergency rescue in accident state, there is a greater risk, once the operation or rescue is improper, it is easy to cause casualties.

[0003] In order to curb the frequent occurrence of related accidents, the government departments also successively introduce various laws and regulations, strictly regulate the closed space operation, aiming at reducing the limited space operation accident rate, standardizing the operation process and reducing the safety production accidents, among which strictly following the operation specification and ventilating in advance are effective safety measures.

[0004] At present, the limited space operation requires'ventilation first, detection second and operation third', that is, using mechanical ventilation equipment to ventilate before operation can effectively eliminate or reduce the oxygen deficiency, suffocation, poisoning, explosion and other gas hazards existing in the limited space, and after ventilation, gas detection is carried out to judge whether the gas environment in the limited space meets the operation safety requirements. At the same time, continuous detection and ventilation should be carried out during operation, and mechanical ventilation is an important ventilation way. However, due to the serious space interference between ordinary air pipe and construction personnel entering and exiting the limited space represented by the well, the ventilation pipeline needs to be withdrawn during operation, and even for the convenience of personnel operation, the ventilation pipeline is not used for ventilation. For example, the municipal inspection well of water, electricity, gas, heat and communication usually has a diameter of 700mm-800mm, and 12 inch fan and 300mm round keel air pipe are used for ventilation before operation. Taking the 1.7m high operating personnel as an example, when entering and exiting the well mouth, the round air pipe will interfere, and the fan needs to be stopped and the pipeline needs to be withdrawn. Such operation mode has safety hazards, and if the concentration of toxic and harmful gas increases during operation, it will harm human health. If the pipeline is not withdrawn, the operating personnel forcibly enter the limited space for operation, and once the danger occurs, the ordinary ventilation pipeline becomes an obstacle to the rapid escape of the operating personnel.

[0005] In summary, how to maintain ventilation and continuous monitoring in the whole construction process, reduce the obstacles of workers entering and exiting the limited space, become the problem to be solved. Practical new type content

[0006] To solve the above technical problems, the utility model provides an oval limited space ventilation pipeline, thereby guaranteeing continuous ventilation and detection in the whole construction process, making workers no longer interfered when entering and exiting, and greatly improving operation safety.

[0007] To solve the above technical problems, the utility model is realized through the following technical schemes:

[0008] The utility model provides an oval limited space ventilation pipeline, which comprises an oval air pipe directly placed in a manhole.The oval air pipe is embedded with multiple oval steel wire keels.A sampling pipe interface is arranged at the central position of the ring side of each oval steel wire keel.A sampling pipe is arranged at the position of the sampling pipe interface, and the sampling pipe is pasted with multiple label papers. The label paper is provided with a quick connection interface matched with the sampling pipe interface. A universal bamboo joint pipe is arranged at the end of the oval air pipe, and the sampling pipe is inserted into the universal bamboo joint pipe.

[0009] As a preferred technical scheme of the utility model, the diameter size of the manhole entrance is D 长 , the long diameter size of the oval air pipe is D 短 , and the short diameter size of the oval air pipe is D 检查井 . 长 检查井 长 短 .

[0010] As a preferred technical scheme of the utility model, the diameter size of the manhole entrance is 700 mm, the long diameter size of the oval air pipe is 450 mm, and the short diameter size of the oval air pipe is 200 mm.

[0011] As a preferred technical scheme of the utility model, the interval between two adjacent oval steel wire keels on the oval air pipe is 150 mm.

[0012] As a preferred technical scheme of the utility model, the interval size between two adjacent label papers on the sampling pipe is 150 mm, and the length of the label paper is 60 mm.

[0013] As a preferred technical scheme of the utility model, the sampling pipe interface adopts two snap fastener female ends with a distance of 30 mm, and the quick connection interface adopts two snap fastener male ends matched with the snap fastener female ends.

[0014] As a preferred technical scheme of the utility model: the length of the universal bamboo joint pipe is not less than 200mm, the inner diameter of the universal bamboo joint pipe is not less than 3mm, and the outer diameter size of the sampling pipe is not greater than the inner diameter size of the universal bamboo joint pipe.

[0015] Compared with the prior art, the utility model has the beneficial effects that:

[0016] 1. The utility model discloses an oval keel support's air pipe, under the same ventilation section, its flat long shape reduces the space of well mouth, makes the operating personnel no longer interfered, realizes the uninterrupted ventilation, greatly improves the operation safety, effectively solves the problem that the limited space hole is narrow, the circular ventilation pipe occupies the well mouth space and causes the personnel to be difficult to go in and out, avoids the risk of the accumulation of toxic and harmful gases caused by stopping the wind, and guarantees the safety of the construction personnel in the process of going in and out and operating.

[0017] 2. The utility model discloses the gas detector sampling pipe interface on the oval keel, and the sampling pipe adopts PET material and is equipped with snap fastener male end quick coupling interface, cooperates with the snap fastener female end on the keel, so that the sampling pipe can be quickly fixed on the oval air pipe, and the universal bamboo joint pipe arranged at the end of the air pipe can reduce the influence of the air inlet at the end of the detection pipe on the air outlet of the air pipe, ensure that the gas detector can continuously monitor the gas composition and content before and during construction, guarantee the construction safety, effectively solve the problems of binding the gas detection sampling pipe and the pipeline and continuous ventilation and gas detection before and during the limited space operation, avoid the problems of untimely detection or pipeline disorder caused by poor fixing of the sampling pipe, and keep the construction site clean. DRAWINGS

[0018] Figure 1 It is a schematic view of the position relationship between the oval air pipe and the construction personnel when the construction personnel go down the well.

[0019] Figure 2 It is a schematic view of the interval distribution interface of the oval air pipe in the utility model.

[0020] Figure 3 It is a schematic view of the interval distribution quick coupling interface of the sampling pipe in the utility model.

[0021] Wherein: 1 - inspection well;2 - oval air pipe;3 - oval steel wire keel;4 - sampling pipe interface;5 - sampling pipe;6 - label paper;7 - quick coupling interface;8 - construction personnel;9 - universal bamboo joint pipe. CONCRETE IMPLEMENTING METHOD

[0022] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the utility model is further explained in detail in combination with the drawings and examples. It should be understood that the specific examples described here are only used to explain the utility model, and are not used to limit the utility model.

[0023] Embodiment one, the utility model relates to in inspection well ventilation, detects installation process, specific content is as follows:

[0024] (I) before construction material preparation

[0025] According to the size of inspection well (such as the common municipal inspection well diameter 700mm-800mm), customizes the long diameter 450mm, short diameter 200mm oval air pipe 2, ensures that its material meets the ventilation requirement and has certain strength and corrosion resistance, such as PVC cloth flexible material.

[0026] Purchase oval steel wire keel 3, its specification needs to be adapted to oval air pipe 2, guarantees effective support to the air pipe structure after embedding. According to the requirement of every 150mm interval distance, prepare enough quantity of keel.

[0027] Purchase the sampling tube 5 of PET material, its pipe diameter should match the gas detection instrument, ensure that the gas transmission is smooth. At the same time, prepare the length of 60mm label paper 6, two press button male ends with 30mm interval are sewn on the label paper as quick connector 7, the press button male end needs to be closely matched with the press button female end on the subsequent keel, guarantees connection firm and easy operation, and is prepared by sticking at 150mm interval.

[0028] Prepare the press button female end for the sampling tube interface 4, two groups, and prepare the corresponding specification size universal bamboo joint pipe 9.

[0029] (II) sampling tube installation

[0030] First step, sampling tube interface installation

[0031] In the central position of every oval steel wire keel 3, accurately sew two press button female ends as sampling tube interface 4 at the transverse interval 30mm. Ensure that the press button female end is firmly fixed on the keel during installation, and the interval meets the requirement, can adopt special tool to sew, and carries out tension test, prevents loosening and falling off in the use process.

[0032] Check the installed sampling tube interface 4, ensure that it is not damaged, deformed, and can be smoothly matched with the press button male end of sampling tube 5, can carry out simulation connection test, guarantees connection close, fast.

[0033] Second step, sampling tube connection

[0034] The prepared sampling tube 5 is laid along the air pipe 2, makes the label paper 6 on the sampling tube evenly distributed at 150mm interval, and ensures that the press button male end on the label paper 6 corresponds with the position of the press button female end on the keel. During the connection process, gently press the press button male end and the press button female end, make them closely connected, realize the quick fixation of sampling tube 5, and at the same time, avoid the damage of press button or connection not firm.

[0035] Then, a section of universal bamboo joint pipe 9 is installed at the end of the oval air pipe 2, and the sampling pipe 5 is inserted into the section of universal bamboo joint pipe 9 at the end of the sampling pipe 5, so as to reduce the influence of the air inlet at the end of the sampling pipe 5 by the air inlet of the oval air pipe 2, and ensure the stability of the sampling air at the end of the sampling pipe 5.

[0036] After the connection is completed, the overall connection of the sampling pipe 5 is checked to ensure that there is no loose part and air leakage part. The sealing property and reliability of the connection can be judged by blowing air into the sampling pipe and detecting the gas flow and pressure at the other end by using a gas detector.

[0037] (Three) Ventilation and detection operation

[0038] The oval air pipe 2 with the sampling pipe 5 prepared is carried to the inspection well to be operated, the oval air pipe 2 is gradually lowered along the side wall of the inspection well to the corresponding position, the oval air pipe 2 is connected to the ventilation equipment, the sampling pipe 5 is connected to the gas detector, the ventilation equipment and the gas detector are started, ventilation and detection are performed, and after the detection is qualified, the construction personnel can enter the inspection well to perform corresponding operation.

[0039] The above only describes the preferred embodiments of the utility model, and does not limit the utility model, and any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. An elliptical limited space ventilation pipe, characterized in that: an elliptical air pipe (2) is directly placed in a manhole (1); a plurality of elliptical steel wire keels (3) are embedded in the elliptical air pipe (2); a sampling pipe interface (4) is arranged at the central position of the ring side of each elliptical steel wire keel (3); a sampling pipe (5) is arranged at the position of the sampling pipe interface (4), and a plurality of label papers (6) are attached to the sampling pipe (5); the label paper (6) is provided with a quick connection interface (7) matched with the sampling pipe interface (4); a universal bamboo joint pipe (9) is arranged at the end of the elliptical air pipe (2), and the sampling pipe (5) is inserted into the universal bamboo joint pipe (9).

2. The elliptical limited space ventilation pipe according to claim 1, characterized in that: Let the diameter size of the manhole (1) entrance and exit be D 检查井 , the long diameter size of the oval air duct (2) be D 长 , the short diameter size of the oval air duct (2) be D 短 ; wherein 0.7D 检查井 D 长 0.5D 检查井 D 长 2D 短 .

3. The elliptical limited space ventilation pipe according to claim 2, characterized in that: the diameter of the entrance and exit of the manhole (1) is 700-800 mm, the length of the elliptical air pipe (2) is 450 mm, and the short diameter of the elliptical air pipe (2) is 200 mm.

4. An elliptical limited space duct according to claim 1, wherein: The interval between two adjacent elliptical steel wire keels (3) on the elliptical air pipe (2) is 150 mm.

5. The elliptical limited space ventilation pipe according to claim 1, characterized in that: the interval between two adjacent label papers (6) on the sampling pipe (5) is 150 mm, and the length of the label paper (6) is 60 mm.

6. An elliptical limited space duct according to claim 1, wherein: The sampling pipe interface (4) adopts two snap button female ends with a distance of 30 mm, and the quick connection interface (7) adopts two snap button male ends matched with the snap button female ends.

7. The elliptical limited space ventilation pipe according to claim 1, characterized in that: the length of the universal bamboo joint pipe (9) is not less than 200 mm, the inner diameter of the universal bamboo joint pipe (9) is not less than 3 mm, and the outer diameter of the sampling pipe (5) is not greater than the inner diameter of the universal bamboo joint pipe (9).

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