CN219527993U

CN219527993U - Blow-down pipe rainproof device

Info

Publication number: CN219527993U
Application number: CN202320602578.9U
Authority: CN
Inventors: 张国强; 杜建合; 魏答楼
Original assignee: Guolei Safety Protection Technology Xi'an Co ltd
Current assignee: Guolei Safety Protection Technology Xi'an Co ltd
Priority date: 2023-03-24
Filing date: 2023-03-24
Publication date: 2023-08-15
Anticipated expiration: 2033-03-24

Abstract

The utility model provides a blow-down pipe rainproof device which comprises a gas dispersing pipe, a top cap seal head, a mounting seat and a guide cover, wherein the top end of the gas dispersing pipe is provided with an arc-shaped top cap seal head, and the bottom end of the gas dispersing pipe is provided with the mounting seat connected with a blow-down vertical pipe; the periphery of the air dispersing pipe is provided with a guide cover, an upward air dispersing channel is formed between the guide cover and the air dispersing pipe, a plurality of guide holes communicated with the air dispersing channel are formed in the side face of the air dispersing pipe, and air flow flowing in the inner cavity of the air dispersing pipe enters the air dispersing channel through the guide holes; the bottom of the air guide sleeve is provided with a drainage groove. In the utility model, accumulated water in the guide cover is discharged through the drainage groove, the guide hole is shielded by the maximum degree of wind and rain by utilizing the height difference of the top cap seal head and the guide cover, and the possibility that rainwater flows into the emptying vertical pipe through the guide hole is avoided through the arrangement of the drainage groove. Meanwhile, the diversion holes are utilized for high-efficiency and stable air flow discharge, so that air flow back pressure resistance is reduced, air flow discharge speed is increased, and fatigue damage to the emptying vertical pipe due to uneven stress is avoided.

Description

Blow-down pipe rainproof device

Technical Field

The utility model relates to the field of ventilation rainproof equipment, in particular to a blow-down pipe rainproof device applied to all gas diffusing devices.

Background

At present, all domestic high-pressure system blow-down pipes are designed to be provided with a drain valve at a proper position at the bottom of a blow-down vertical pipe, so that operators on duty are required to drain water manually at regular intervals or after rain; the blow-down pipes of the medium and low pressure systems are partially the same as those of the high pressure systems, and most of the blow-down pipes are provided with or welded with 900 elbows, 450 elbows, tee joints or umbrella caps and the like at the tops of the blow-down pipes, but the blow-down pipes have different advantages and disadvantages, and the blow-down pipes are as follows:

1. the drain valve type rainproof measure is used for a high-pressure emptying system, and has the following problems: firstly, the high-pressure system blow-down pipe is located in the field, which is remote, manual drainage or periodic drainage after rain often cannot be achieved in time due to various factors such as human factors, moreover, if storm rain occurs in a storm, water accumulation in the pipe is serious, local part of the pipe can overflow the blow-down pipe to be directly flooded to the position of the blow-down valve, and the rainproof function is lost; secondly, the drain valve at the bottom of the emptying/scattering pipe of most station valve chambers is subjected to disc activity maintenance for a long time, and a valve core valve plate is severely corroded and cannot be opened; thirdly, in the alpine region, accumulated water is not discharged in time in rainy season, so that the alpine region can be frozen and expanded in winter, and a pipeline is frozen and cracked or ice is blocked, and if the alpine region is scattered in emergency, the pipeline is blocked, so that serious safety accidents such as pipeline burst and the like are caused.

2. The fatal defects of elbow type rainproof measures such as 45 degrees, 90 degrees and 180 degrees are that lateral force is generated during emptying, if a great deal of emergency quick discharging is encountered, the emptying stand pipe can be caused to swing violently, and the emptying stand pipe can be caused to break when serious.

3. The blow-down pipes of the medium-low pressure system are positioned in dense areas of personnel and buildings, the elbow, the tee joint and the umbrella cap rain-proof measures change the direction of the flow of the blow-down air, so that combustible gas such as natural gas is discharged horizontally or horizontally in an inclined manner, and the natural gas or harmful gas is easily caused to blow into the indoor or surrounding crowd of the adjacent building due to the fact that the umbrella cap can cause gas refraction and discharge horizontally in the inclined manner, and explosion or personnel poisoning events can be caused when the fire source is encountered; if an ignition and diffusion mode is adopted, burn can be caused to an ignition person, and the warning range is difficult to determine.

The comparison table of the advantages and disadvantages of various rain-proof measures of the prior blow-down pipe:

disclosure of Invention

The utility model aims to provide a blow-down pipe rainproof device which can prevent rainwater from entering a blow-down pipe to cause accumulated water in the blow-down pipe or rust, blockage and the like on the inner wall of the pipe caused by accumulated water and icing.

In order to achieve the above purpose, the utility model provides a blow-down pipe rainproof device, which comprises a gas dispersing pipe, a top cap seal head, a mounting seat and a guide cover, wherein the top end of the gas dispersing pipe is provided with the arc-shaped top cap seal head, and the bottom end of the gas dispersing pipe is provided with the mounting seat, so that the gas dispersing pipe is connected with a flange of a blow-down vertical pipe; the periphery of the air dispersing pipe is provided with the air guide sleeve, an upward air dispersing channel is formed between the air guide sleeve and the air dispersing pipe, a plurality of air guide holes communicated with the air dispersing channel are formed in the side face of the air dispersing pipe, and air flowing in the inner cavity of the air dispersing pipe enters the air dispersing channel through the air guide holes; the bottom of the air guide sleeve is provided with a drainage groove.

Further, in the blow-down pipe rainproof device, the inner diameter of the inner cavity is identical to the inner diameter of the blow-down pipe.

Further, in the blow-down pipe rainproof device, the diversion holes are arranged on the air dispersing pipe in a spiral symmetrical layout.

Further, in the blow-down pipe rainproof device, the aperture and the number of the diversion holes and the airflow diffusion area of the diversion cover are all related to the calculation of the maximum blow-down flow rate and the flow velocity which can pass through the blow-down vertical pipe.

Further, in the blow-down pipe rainproof device, the bottom plane of the top cap seal head is higher than the top edge of the guide cover, and the height difference between the bottom plane of the top cap seal head and the top edge of the guide cover is K.

Further, in the blow-down pipe rainproof device, the height difference K is associated with wind speed calculation in the environment.

Further, in the blow-down pipe rainproof device, the number and the area of the drainage grooves are associated with the calculation of the level of heavy rain in the environment.

Further, in the blow-down pipe rainproof device, a miniature bird repellent device is arranged on the top cap sealing head.

Further, in the blow-down pipe rainproof device, a flash receiving device is arranged on the top cap sealing head.

Further, in the blow-down pipe rainproof device, an electronic ignition device or a manual ignition device is arranged on the air dispersing pipe.

Compared with the prior art, the utility model has the beneficial effects that: the water is accumulated in the guide cover through the drainage groove, the guide hole is shielded by utilizing the height difference of the top cap seal head and the guide cover to the greatest extent, and the possibility that rainwater flows into the emptying vertical pipe through the guide hole is avoided through the arrangement of the drainage groove. Meanwhile, the diversion holes are utilized for high-efficiency and stable air flow discharge, so that air flow back pressure resistance is reduced, air flow discharge speed is increased, and fatigue damage to the emptying vertical pipe due to uneven stress is avoided.

Drawings

Fig. 1 is a schematic structural view of a hollow tube rainproof device of the utility model.

Detailed Description

The blow-down pipe flashing device of the present utility model will now be described in more detail with reference to the drawings, in which preferred embodiments of the utility model are shown, it being understood that the person skilled in the art may modify the utility model described herein while still achieving the advantageous effects of the utility model. Accordingly, the following description is to be construed as broadly known to those skilled in the art and not as limiting the utility model.

In the description of the present utility model, it should be noted that, for the azimuth words such as terms "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the azimuth and positional relationships are based on the azimuth or positional relationships shown in the drawings, it is merely for convenience of describing the present utility model and simplifying the description, and it is not to be construed as limiting the specific scope of protection of the present utility model that the device or element referred to must have a specific azimuth configuration and operation.

In the present utility model, unless explicitly stated and limited otherwise, the terms "assembled," "connected," and "connected" are to be construed broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; or may be a mechanical connection; can be directly connected or connected through an intermediate medium, and can be communicated with the inside of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The utility model is more particularly described by way of example in the following paragraphs with reference to the drawings. The advantages and features of the present utility model will become more apparent from the following description. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for convenience and clarity in aiding in the description of embodiments of the utility model.

As shown in fig. 1, the utility model provides a blow-down pipe rainproof device, which comprises a gas dispersing pipe 1, a top cap seal head 2, a mounting seat 3 and a guide cover 4, wherein the top end of the gas dispersing pipe 1 is provided with an arc-shaped top cap seal head 2, and the bottom end of the gas dispersing pipe 1 is provided with the mounting seat 3 connected with a blow-down vertical pipe; the periphery of the air dispersing pipe 1 is provided with an air guide sleeve 4, an upward air dispersing channel 5 is formed between the air guide sleeve 4 and the air dispersing pipe 1, a plurality of air guide holes 6 communicated with the air dispersing channel 5 are formed in the side face of the air dispersing pipe 1, and air flow flowing in the inner cavity 7 of the air dispersing pipe 1 enters the air dispersing channel 5 through the air guide holes 6; the bottom of the air guide sleeve 4 is provided with a drainage groove 8.

Further, the inner diameter of the inner cavity 7 is consistent with the inner diameter of the emptying vertical pipe, after the emptying gas in the emptying vertical pipe is discharged into the inner cavity 7, the gas flow enters the air dispersing channel 5 through the diversion holes 6, and is uniformly and quickly dispersed to the upper part under the action of the diversion cover 4, so that the gas dispersing function is completed.

Further, the diversion holes 6 are arranged on the air dispersing pipe 1 in a spiral symmetrical layout, namely, the diversion holes 6 are a group of parallel spiral holes so as to reduce air flow back pressure resistance, increase air flow release speed according to the rifling principle, and simultaneously avoid fatigue damage to the emptying vertical pipe caused by uneven stress.

Further, the aperture and the number of the diversion holes 6 and the air flow diffusion area of the diversion cover 4 are set, and the setting needs to be obtained by calculating according to the system pressure and the maximum emptying flow rate and flow velocity which can pass through the pipe diameter of the emptying vertical pipe under the condition of considering the back pressure of the pipe orifice of the emptying vertical pipe.

Further, the bottom plane of the top cap seal head 2 is higher than the top edge of the air guide sleeve 4, the height difference between the bottom plane of the top cap seal head 2 and the top edge of the air guide sleeve 4 is K, and the height difference K is obtained by calculating the wind speed in the environment.

Further, the number and area of the drainage channels 8 are calculated from the level of stormwater in the environment.

Furthermore, as most of the emptying stand pipes are arranged in the open field, in order to prevent birds from nesting on the upper part of the rain hat, the miniature bird repeller is arranged on the top hat sealing head 2 in the emptying rain-proof device of the utility model, so that the process of emptying and diffusing air is ensured to be safe and reliable.

Furthermore, as most of the emptying risers are arranged at the roof or the field high points, in order to avoid disaster risks caused by direct lightning strike, according to the specification requirements of the GB50057-2010 lightning protection design, the top cap head 2 of the emptying pipe rainproof device is provided with a lightning receiving device.

Meanwhile, the blow-down pipe rainproof device can be additionally provided with an electronic ignition device or a manual ignition device according to the requirements of users.

In addition, the mounting seat 3 at the bottom end of the air dispersing pipe 1 can be connected with the emptying vertical pipe through various mounting structures, and specifically comprises the following steps: the screw thread structure is suitable for Dn50 and lower emptying risers, and the system design pressure is less than or equal to Pn0.4MPa; the flange structure is applicable to all pressures and pipe diameters; the welded structure is suitable for all pressures and pipe diameters; the quick-assembly structure is suitable for Pn0.4/Dn100 and the lower emptying vertical pipes.

Specifically, each series of reference data for the vent riser is as follows, pn referring to the system design pressure:

Pn0.1

Pn0.4

Pn0.8

Pn1.6

Pn2.5

Pn4.0

Pn6.4

Pn8.0

Pn10

Pn25

Dn20

√

Dn25

√

Dn40

√

Dn50

√

Dn65

√

Dn80

√

Dn100

√

Dn125

√

Dn150

√

Dn200

√

specifically, the operation principle of the blow-down pipe rainproof device for rainproof is as follows:

the vertical rain falling is shielded by an arc-shaped top cap seal head 2 with the same diameter as the emptying vertical pipe; because the rainwater is influenced by the wind direction, the floating rainfall on the windward side of the emptying vertical pipe is maximum, and the rainwater is mainly shielded by the air guide cover 4 at the moment; rainwater falls into the groove cavity of the air dispersing channel 5 of the air guide sleeve 4 along the surface of the rainproof device, accumulated water is discharged along the water discharge groove 8 at the bottom of the air guide sleeve 4, and the quantity and the area of the water discharge grooves 8 arranged based on the level of heavy rain can ensure that the liquid level of accumulated water in the groove cavity of the air guide sleeve 4 does not exceed the level of the bottommost gas guide hole 6 in half an hour, and the accumulated water is prevented from flowing into the emptying vertical pipe under the condition of ensuring the water discharge efficiency.

To sum up, in this embodiment, the blow-down pipe rainproof device that proposes discharges ponding in the kuppe through the water drainage tank, utilizes the difference in height of top cap head and kuppe to carry out the biggest shielding of wind and rain to the guiding hole to avoid the rainwater to flow into the possibility in the riser of blowing down through the guiding hole through the setting of water drainage tank. Meanwhile, the diversion holes are utilized for high-efficiency and stable air flow discharge, so that air flow back pressure resistance is reduced, air flow discharge speed is increased, and fatigue damage to the emptying vertical pipe due to uneven stress is avoided.

The foregoing is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any person skilled in the art will make any equivalent substitution or modification to the technical solution and technical content disclosed in the utility model without departing from the scope of the technical solution of the utility model, and the technical solution of the utility model is not departing from the scope of the utility model.

Claims

1. The blow-down pipe rainproof device is characterized by comprising a gas dispersing pipe (1), a top cap seal head (2), a mounting seat (3) and a guide cover (4), wherein the top end of the gas dispersing pipe (1) is provided with an arc-shaped top cap seal head (2), and the bottom end of the gas dispersing pipe (1) is provided with the mounting seat (3) connected with a blow-down vertical pipe; the periphery of the air dispersing pipe (1) is provided with the air guide sleeve (4), an upward air dispersing channel (5) is formed between the air guide sleeve (4) and the air dispersing pipe (1), a plurality of air guide holes (6) communicated with the air dispersing channel (5) are formed in the side face of the air dispersing pipe (1), and air flow flowing in an inner cavity (7) of the air dispersing pipe (1) enters the air dispersing channel (5) through the air guide holes (6); the bottom of the air guide sleeve (4) is provided with a drainage groove (8).

2. Blow-down pipe rainproof device according to claim 1, characterized in that the inner diameter of the inner cavity (7) corresponds to the inner diameter of the blow-down pipe.

3. The blow-down pipe rainproof device according to claim 1, wherein the diversion holes (6) are arranged on the air dispersing pipe (1) in a spiral symmetrical arrangement.

4. A blow-down pipe flashing device according to claim 3, characterised in that the aperture and number of the pilot holes (6) and the airflow spreading area of the pod (4) are both computationally linked to the maximum blow-down flow rate through which the blow-down riser can pass.

5. The blow-down pipe rainproof device according to claim 1, wherein the bottom plane of the top cap seal head (2) is higher than the top edge of the guide cover (4), and the height difference between the bottom plane of the top cap seal head (2) and the top edge of the guide cover (4) is K.

6. The blow-down pipe rain shield of claim 5, wherein the height difference K is associated with a calculation of wind speed in the environment.

7. The blow-down pipe rainproof device according to claim 1, characterized in that the number and area of the drainage channels (8) are correlated with the calculation of the level of heavy rain in the environment.

8. The blow-down pipe rainproof device according to claim 1, wherein a miniature bird repellent device is arranged on the top cap seal head (2).

9. The blow-down pipe rainproof device according to claim 1, wherein a lightning receiving device is arranged on the top cap seal head (2).

10. The blow-down pipe rainproof device according to claim 1, wherein an electronic ignition device or a manual ignition device is arranged on the air dispersing pipe (1).