CN210920927U

CN210920927U - Frost crack prevention device for drainage system of long-distance heat supply network

Info

Publication number: CN210920927U
Application number: CN201921615541.XU
Authority: CN
Inventors: 王国兴; 温成; 宋倩倩; 刘清
Original assignee: Nanjing Suxia Design Group Co ltd
Current assignee: Nanjing Suxia Design Group Co ltd
Priority date: 2019-09-26
Filing date: 2019-09-26
Publication date: 2020-07-03
Anticipated expiration: 2029-09-26

Abstract

The utility model discloses a long defeated heat supply network drainage system prevents frostbite and splits device to the fluidic flow direction in the drain pipe, including installing valve I, filter, drain valve and the valve II on the drain pipe in proper order, be located and install the check valve on the drain pipe in drain valve low reaches, be located and be provided with expansion joint I on the drain pipe between valve I and the filter, be located and install expansion joint II on the drain pipe between check valve and the valve II, expansion joint I and expansion joint II are the expansion joint, the expansion joint is including setting up the expansion chamber in the expansion valve body, assemble in the expansion chamber and the child intussuseption fill have the expansion tire of nitrogen gas and set up in the spacing ring at expansion tire both ends, and the fluid in the drain pipe flows through spacing ring, the expansion tire and the spacing ring in the expansion chamber in proper order. The utility model discloses the comparison is applicable to on the long heat transfer network pipeline in severe cold area and field work, and simple structure very easily produces and popularizes and applies moreover.

Description

Frost crack prevention device for drainage system of long-distance heat supply network

Technical Field

The utility model relates to a drainage system technical field, in particular to long defeated heat supply network drainage system prevents frostbite and splits device.

Background

The temperature of the pipeline for long-distance steam medium transmission is reduced, and the steam in the pipeline is changed into saturated steam from superheated steam after temperature reduction until condensate water is generated. Under the condition of high flow velocity, the steam can drive the condensed water to impact the pipeline, namely, the water hammer phenomenon. Therefore, a drainage system is needed in the steam pipeline system, which can automatically drain condensed water in heat-consuming equipment and pipelines, automatically prevent steam leakage, and simultaneously drain air and other non-condensed gases accumulated in the pipeline system. However, when the drainage system is used in winter or in colder areas, if the heat preservation measures of the drainage system are unfavorable, the drainage pipeline or the valve can be burst due to condensation and expansion of the pipeline water, and the phenomenon is very common, even a large amount of steam is leaked, and a large amount of manpower, material resources and financial resources are consumed. Therefore, a proper drainage system is developed, the influence on the motion working condition of the steam pipeline system is great, and the drainage system has important significance on improving the heat efficiency of the heat pipeline system and saving energy.

SUMMERY OF THE UTILITY MODEL

The utility model provides a long defeated heat supply network drainage system prevents frostbite and splits device to solve the problem among the prior art.

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

a device for preventing a long-distance heat-transfer network drainage system from being frozen and cracked comprises a valve I2, a filter 4, a drain valve 5 and a valve II8 which are sequentially arranged on a drain pipe 1, wherein a check valve 6 is arranged on the drain pipe 1 at the downstream of the drain valve 5 to prevent steam space water accumulation when the inlet pressure of the drain valve 5 is reduced or the drainage pipe is shut down, an expansion joint I3 is arranged on the drain pipe 1 between the valve I2 and the filter 4, an expansion joint II7 is arranged on the drain pipe 1 between the check valve 6 and the valve II8, the expansion joint I3 and the expansion joint II7 are expansion joints, the expansion joints comprise an expansion cavity 32 arranged in the expansion valve body 31, an expansion tire 34 assembled in the expansion cavity 32 and filled with nitrogen gas in the tire, and limit rings 33 arranged at two ends of the expansion tire 34, and fluid in the drain pipe 1 sequentially flows through the limit rings 33, the expansion tire 34 in the expansion cavity 32 and the limit rings 33.

Further, the central axis of the expansion tire 34 is coincident with the pipeline axis of the hydrophobic pipe 1.

Further, the material of the expansion tire 34 is high temperature resistant silica gel, the tire body has strong expansion and contraction capacity, and the tire of the expansion tire 34 is filled with nitrogen.

Further, the limiting rings 33 are positioned at two ends of the expansion tyre 34 and welded with the expansion valve body 31 to prevent the expansion tyre 34 from displacing along the pipeline axis of the drain pipe 1.

Further, the radius of the circular ring of the expanded tire 34 is 30% of the radius of the drain pipe 1.

Further, the length of the expansion valve body 31 is 4 times of the radius of the circular ring of the expansion tire 34.

Further, the valve I2 is welded with the drain pipe 1, and the valve II8 is connected with the drain pipe 1 through a flange.

Further, the outer of the drain pipe 1 is wrapped with a heat insulation layer 9, and the outer of the heat insulation layer 9 is wrapped with an outer protection layer 10.

Furthermore, the expansion joint I3, the filter 4, the drain valve 5, the check valve 6 and the expansion joint II7 are all located in the insulating layer 9, the valve I2 and the valve II8 are located in the insulating layer 9, and the switches of the valve I2 and the valve II8 extend out of the outer protective layer 10.

Further, the insulating layer 9 is made of high-temperature glass wool insulating material or aluminum silicate needled blanket, and the thickness is 40-80 mm; the outer protective layer 10 is a color steel plate or a color aluminum plate, and the thickness of the pipe wall of the outer protective layer 10 is 0.6 mm.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model can effectively achieve the purpose of preventing the pipelines and valves in the drainage system from frost cracking, and is very suitable for being applied to various liquid pipelines in severe cold areas and field work; even in summer or in some areas where no icing occurs, the drainage system can relieve the influence of pipeline air hammer or local pressurization on pipeline facilities, and avoid the occurrence of pipe burst accidents; in addition, the check valve is additionally arranged on the drainage system, so that the problem of water accumulation in a steam space when the inlet pressure of the drainage valve is reduced or the drainage system is shut down can be solved; the utility model discloses the structure is very simple, very easily produces and popularizes and applies.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic structural view of an expansion joint I and an expansion joint II in the present invention;

FIG. 3 is a schematic cross-sectional view of a middle expansion joint I and an expansion joint II of the present invention;

FIG. 4 is a schematic sectional view taken along line A-A of the expansion joint I and expansion joint II of the present invention;

FIG. 5 is a schematic structural view of the middle expansion tire of the present invention;

FIG. 6 is a schematic cross-sectional view B-B of the middle expansion tire of the present invention;

wherein: 1-drain pipe, 2-valve I, 3-expansion joint I, 31-expansion valve body, 32-expansion cavity, 33-limit ring, 34-expansion tire, 4-filter, 5-drain valve, 6-check valve, 7-expansion joint II, 8-valve II, 9-insulating layer and 10-outer protective layer.

Detailed Description

The present invention will be further described with reference to the following examples.

As shown in fig. 1-6, a device for preventing frost cracking of a long heat transfer network drainage system comprises a valve I2, a filter 4, a drain valve 5 and a valve II8 which are sequentially installed on a drain pipe 1, wherein the valve I2 is welded with the drain pipe 1 and is not easy to leak, the valve II8 is connected with the drain pipe 1 through a flange so as to be convenient to overhaul and replace, a check valve 6 is installed on the drain pipe 1 at the downstream of the drain valve 5 to prevent steam space water accumulation when the inlet pressure of the drain valve 5 is reduced or the drain pipe is shut down, an expansion joint I3 is arranged on the drain pipe 1 between the valve I2 and the filter 4, an expansion joint II7 is installed on the drain pipe 1 between the check valve 6 and the valve II8, an insulating layer 9 is wrapped outside the drain pipe 1, an outer protective layer 10 is wrapped outside the insulating layer 9, the expansion joint I3, the filter 4, the drain valve 5, the check valve 6 and the expansion joint II7 are all located in the insulating, the valve I2 and the valve II8 are positioned in the insulating layer 9, and the switches of the valve I2 and the valve II8 extend out of the outer protective layer 10.

Specifically, the expansion joint I3 and the expansion joint II7 are both expansion joints, the expansion joint includes an expansion cavity 32 provided in the expansion valve body 31, an expansion tire 34 assembled in the expansion cavity 32 and filled with nitrogen gas, and stop rings 33 provided at both ends of the expansion tire 34, and the fluid in the drain pipe 1 sequentially flows through the stop rings 33, the expansion tire 34 in the expansion cavity 32, and the stop rings 33; the central axis of the expansion tire 34 is coincident with the pipeline axis of the drain pipe 1, the expansion tire 34 is made of high-temperature-resistant silica gel, the tire body has strong expansion and contraction capacity, and the tire of the expansion tire 34 is filled with nitrogen; the limiting rings 33 are positioned at two ends of the expansion tyre 34 and are welded with the expansion valve body 31 to prevent the expansion tyre 34 from displacing along the pipeline axis of the drain pipe 1; preferably, the radius of the circular ring of the expansion tire 34 is 30% of the radius of the drain pipe 1, and the length of the expansion valve body 31 is 4 times of the radius of the circular ring of the expansion tire 34.

Preferably, the insulating layer 9 is made of high-temperature glass wool insulating material or aluminum silicate needled blanket, and the thickness is 40-80 mm; the outer protective layer 10 is a color steel plate or a color aluminum plate, and the thickness of the pipe wall of the outer protective layer 10 is 0.6 mm.

The principle of the utility model is as follows: when the drainage system is arranged on a pipeline for normal use, the expansion tire 34 keeps a swelling state, when liquid (water) in the pipeline is reduced, solidified and expanded along with the temperature, the volume of gas in the expansion tire 34 is greatly reduced due to the reduction of the temperature and the increase of the pressure, and the tire body of the expansion tire 34 has better flexibility, so that the frozen expansion part of the water enters the expansion cavity 32, the huge pressure of the expansion of ice on the drainage pipe 1, the valve I2 and the valve II8 is counteracted, and the drainage pipe 1, the valve I2 and the valve II8 are protected from being burst. As the temperature recovers, the ice melts, the volume of water decreases, and the volume of air in the inflated tire 34 increases until it recovers.

The above description is only a preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present invention.

Claims

1. The utility model provides a long heat transfer net drainage system prevents frostbite and splits device which characterized in that: with the flow direction of fluid in trap (1), including installing valve I (2) on trap (1), filter (4), trap (5) and valve II (8) in proper order, be located and install check valve (6) on trap (1) of trap (5) low reaches, be located and be provided with expansion joint I (3) on trap (1) between valve I (2) and filter (4), be located and install expansion joint II (7) on trap (1) between check valve (6) and valve II (8), expansion joint I (3) and expansion joint II (7) are the expansion joint, the expansion joint is including setting up expansion chamber (32) in expansion valve body (31), assembles in expansion chamber (32) and child intussuseption is filled with expansion tire (34) of nitrogen gas and setting up in spacing ring (33) at expansion tire (34) both ends, and the fluid in trap (1) flows through spacing ring (33) in proper order, An expansion tire (34) and a limit ring (33) in the expansion cavity (32).

2. The long heat transfer network drainage system frost crack prevention device of claim 1, wherein: the central axis of the expansion tire (34) is coincident with the pipeline axis of the drainage pipe (1).

3. The long heat transfer network drainage system frost crack prevention device of claim 1, wherein: the material of the expansion tyre (34) is high temperature resistant silica gel, and the inner part of the expansion tyre (34) is filled with nitrogen.

4. The long heat transfer network drainage system frost crack prevention device of claim 1, wherein: the limiting rings (33) are positioned at two ends of the expansion tire (34) and are welded with the expansion valve body (31).

5. The long heat transfer network drainage system frost crack prevention device of claim 1, wherein: the radius of the circular ring of the expansion tire (34) is 30% of the radius of the drainage pipe (1).

6. The long heat transfer network drainage system frost crack prevention device of claim 1, wherein: the length of the expansion valve body (31) is 4 times of the radius of a circular ring of the expansion tire (34).

7. The long heat transfer network drainage system frost crack prevention device of claim 1, wherein: the valve I (2) is welded with the drain pipe (1), and the valve II (8) is connected with the drain pipe (1) through a flange.

8. The long heat transfer network drainage system frost crack prevention device of claim 1, wherein: the outer side of the drain pipe (1) is wrapped with an insulating layer (9), and the outer side of the insulating layer (9) is wrapped with an outer protective layer (10).

9. The long heat transfer network drainage system frost crack prevention device of claim 1, wherein: expansion joint I (3), filter (4), trap (5), check valve (6) and expansion joint II (7) all are located heat preservation (9), valve I (2) and valve II (8) are located heat preservation (9), and the switch of valve I (2) and valve II (8) stretches out in outer jacket (10).

10. The long heat transfer net hydrophobic system frost crack prevention device of claim 8, wherein: the heat-insulating layer (9) is made of high-temperature glass wool heat-insulating material or aluminum silicate needled blanket, and the thickness is 40-80 mm; the outer protective layer (10) is a color steel plate or a color aluminum plate, and the thickness of the pipe wall of the outer protective layer (10) is 0.6 mm.