Automatic closing device for pipe explosion of boiler water level gauge

Abstract

The utility model discloses a boiler water level gauge tube explosion automatic closing device which is arranged between a boiler drum and a glass tube water level gauge and comprises a boiler connecting flange, an automatic closing tube and a water level gauge connecting flange. The automatic closing pipe comprises a straight pipe section and a bent pipe section; the straight pipe section sequentially comprises a first concentric reducer, a sealing equal-diameter tee joint, a second concentric reducer and a reducer tee joint; the bent pipe section sequentially comprises a first long-radius elbow, a check valve, a second long-radius elbow and a sealing ball; the first long-radius elbow is connected with the sealing equal-diameter tee joint, and the second long-radius elbow is connected with the reducing tee joint. When a pipe explosion accident occurs, the device can be closed in time, a large amount of water and steam are prevented from being sprayed out, the influence of the accident is effectively reduced, the sweep range is reduced, and the accident loss is reduced. The utility model has the advantages that the water level gauge communicating pipe can be automatically closed after pipe explosion, the accident influence is reduced, and the loss is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic oil pumps, in particular to an automatic closing device for a boiler water level gauge burst pipe. Background Art

[0002] Industrial boilers are managed by auxiliary departments in most industrial enterprises, so they are relatively lacking in technology and operation management. Boiler glass water level gauge is one of the most widely used water level gauges for industrial boilers. The disadvantage of glass water level gauge is that it is easy to be eroded and worn. The industrial steam pressure fluctuates greatly. If it is not replaced in time, it will burst.

[0003] Industrial boiler glass tube water level gauges are prone to tube bursting accidents for the following reasons:

[0004] 1. The quality of glass tube water level gauges on the market varies greatly, making selection difficult;

[0005] 2. Flushing the water level gauge will wear out the glass tube;

[0006] 3. The steam pressure and temperature of industrial boilers vary greatly, resulting in frequent boiler glass tube burst accidents.

[0007] However, due to the uneven quality of glass tubes, changes in water quality, different frequencies of flushing water level gauges, and random steam pressure fluctuations, the factory is basically unable to predict the time of a tube burst. Once a water level gauge tube bursts, a large amount of water and steam will rush out, causing not only personal injury, but also secondary damage to surrounding equipment and the electrical equipment of the boiler itself, especially for boilers installed indoors, where the hazards of the accident are more serious. Utility Model Content

[0008] The purpose of the utility model is to provide an automatic closing device for a boiler water level gauge burst pipe. The utility model has the advantages of automatically closing the water level gauge connecting pipe after the pipe bursts, reducing the impact of the accident and reducing losses.

[0009] The technical solution of the utility model is as follows: a boiler water level gauge burst pipe automatic closing device, a total of two, detachably arranged between the boiler drum and the glass tube water level gauge, respectively connected to the steam side and the water side of the glass tube water level gauge; each comprises a boiler connecting flange, an automatic closing pipe and a water level gauge connecting flange; the automatic closing pipe comprises a straight pipe section and a curved pipe section located below; the straight pipe section is sequentially a No. 1 concentric reducer, a sealed equal-diameter tee, a No. 2 concentric reducer and a reducing tee from the boiler drum to the glass tube water level gauge; the curved pipe section is sequentially a No. 1 long radius elbow, a check valve, a No. 2 long radius elbow and a sealing ball arranged in the No. 1 long radius elbow; the No. 1 long radius elbow is connected to the sealed equal-diameter tee, and the No. 2 long radius elbow is connected to the reducing tee.

[0010] In the aforementioned boiler water level gauge burst pipe automatic shut-off device, a limiting ring for limiting the sealing ball is provided inside the connecting end between the sealed equal-diameter tee and the second concentric reducer.

[0011] In the aforementioned boiler water level gauge burst pipe automatic closing device, the No. 1 concentric reducer is connected to the valve of the boiler drum via the boiler connecting flange.

[0012] In the aforementioned boiler water level gauge burst pipe automatic closing device, the flow direction of the check valve is from the glass tube water level gauge to the boiler drum.

[0013] In the aforementioned boiler water level gauge burst pipe automatic closing device, the sealing ball is a hollow ball.

[0014] Compared with the prior art, the present invention is connected and arranged between the boiler drum and the glass tube water level gauge, and is respectively connected to the steam side and the water side of the glass tube water level gauge, and is composed of a straight pipe section and a curved pipe section. The straight pipe section is used as a normal delivery pipe. Under normal circumstances, the sealing ball is located in the curved pipe section, and the glass tube water level gauge is used normally.

[0015] When a glass tube water level gauge bursts, a large amount of water and steam will be ejected from the burst, thus forming a suction operation at the sealing equal-diameter tee. The sealing ball will be sucked into the sealing equal-diameter tee and block the No. 2 concentric reducer. The straight pipe section will be blocked and closed, thus realizing the automatic closure of the glass tube water level gauge due to a burst.

[0016] The structure of the present invention is simple and ingenious, and the pure mechanical structure is used without electrical units, thereby ensuring the safety and reliability of the device. The present invention can timely and effectively realize the function of automatic shutdown when the glass tube water level gauge bursts, thereby avoiding secondary accidents, greatly reducing the leakage of steam and water, and providing a safe accident handling environment for operators.

[0017] By adopting this device, when a pipe burst occurs, it can be closed in time to prevent a large amount of water and steam from spraying out, effectively reducing the impact of the accident, reducing the affected area, and reducing the loss caused by the accident.

[0018] Therefore, the utility model has the advantages of automatically closing the water level gauge connecting pipe after the pipe bursts, thereby reducing the impact of the accident and minimizing the loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0021] Figure 3 yes Figure 1 Enlarged view of point B in the middle.

[0022] The markings in the attached drawings are: 1- boiler connecting flange, 2- No. 1 concentric reducer, 3- No. 2 concentric reducer, 4- reducing tee, 5- water level gauge connecting flange, 6- sealed equal diameter tee, 7- No. 1 long radius elbow, 8- sealing ball, 9- No. 2 long radius elbow, 10- glass tube water level gauge, 101- steam side, 102- water side, 11- check valve, 12- valve, 13- boiler drum. DETAILED DESCRIPTION

[0023] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0024] Embodiment. A boiler water level gauge burst pipe automatic shut-off device, such as Figure 1 As shown, there are two of them, which are detachably arranged between the boiler drum 13 and the glass tube water level gauge 10, and are respectively connected to the steam side 101 and the water side 102 of the glass tube water level gauge 10; each includes a boiler connecting flange 1, an automatic closing pipe and a water level gauge connecting flange 5; the automatic closing pipe includes a straight pipe section and a curved pipe section located below; the straight pipe section from the boiler drum 13 to the glass tube water level gauge 10 is sequentially composed of a No. 1 concentric reducer 2, a sealed equal-diameter tee 6, a No. 2 concentric reducer 3 and a reducing tee 4; the curved pipe section is sequentially composed of a No. 1 long radius elbow 7, a check valve 11, a No. 2 long radius elbow 9 and a sealing ball 8 arranged in the No. 1 long radius elbow 7; the No. 1 long radius elbow 7 is connected to the sealed equal-diameter tee 6, and the No. 2 long radius elbow 9 is connected to the reducing tee 4.

[0025] A limiting ring 61 for limiting the sealing ball 8 is provided inside the end where the sealing equal-diameter tee 6 is connected to the second concentric reducer 3 .

[0026] The first concentric reducer 2 is connected to the valve 12 of the boiler drum 13 via the boiler connecting flange 1.

[0027] The flow direction of the check valve 11 is from the glass tube water level gauge 10 to the boiler drum 13 .

[0028] The sealing ball 8 is a hollow ball.

[0029] This device is made of 304 stainless steel and has multiple pressure levels corresponding to different boiler working pressures.

[0030] The boiler connecting flange 1 and the water level gauge connecting flange 5 are DN25, the No. 1 concentric reducer 2 is 25×15, the No. 2 concentric reducer 3 is 15×25, the reducing tee 4 is 25×25×15, the sealed equal-diameter tee 6 is 15×15×15, the No. 1 long radius elbow 7 and the No. 2 long radius elbow 9 are DN15, the check valve 11 is DN15, model H14W.

[0031] Working principle:

[0032] Under normal circumstances, the water side 102 and the steam side 101 of the glass tube water level gauge 10 are normally connected to the boiler drum 13 through the device, and the drum water level is displayed according to the connecting pipe principle;

[0033] When the glass tube water level gauge 10 bursts, a large amount of water and steam rushes out from the burst pipe, forming a suction effect at the sealing equal-diameter tee 6, and the sealing ball 8 is instantly sucked into the sealing equal-diameter tee 6, and the straight pipe section is blocked and closed in time by the sealing ball 8, so that the glass tube water level gauge bursts and is automatically closed; when the sealing ball 8 is sucked to the sealing surface, the curved pipe section prevents the steam and water in the boiler drum 13 from flowing to the glass tube water level gauge 10 through the check valve 11; after the operator closes the valve 12, the sealing ball 8 automatically returns to the lower curved pipe section due to gravity; the same applies to the steam side 101 and the water side 102.

Claims

1. A boiler water level gauge burst automatic closing device, two in total, detachably arranged between the boiler drum (13) and the glass tube water level gauge (10), respectively connected to the steam side (101) and the water side (102) of the glass tube water level gauge (10), characterized in that: Each of them comprises a boiler connection flange (1), an automatic closing pipe and a water level gauge connection flange (5); the automatic closing pipe comprises a straight pipe section and a curved pipe section located below; the straight pipe section comprises a No. 1 concentric reducer (2), a sealed equal-diameter tee (6), a No. 2 concentric reducer (3) and a reducing tee (4) in the direction from the boiler drum (13) to the glass tube water level gauge (10); the curved pipe section comprises a No. 1 long radius elbow (7), a check valve (11), a No. 2 long radius elbow (9) and a sealing ball (8) arranged in the No. 1 long radius elbow (7); the No. 1 long radius elbow (7) is connected to the sealed equal-diameter tee (6), and the No. 2 long radius elbow (9) is connected to the reducing tee (4).

2. The boiler water level gauge burst automatic closing device according to claim 1, characterized in that: A limiting ring (61) for limiting the sealing ball (8) is provided in the end where the sealing equal-diameter tee (6) is connected to the second concentric reducer (3).

3. The boiler water level gauge burst automatic closing device according to claim 1, characterized in that: The first concentric reducer (2) is connected to the valve (12) of the boiler drum (13) via the boiler connection flange (1).

4. The boiler water level gauge burst automatic closing device according to claim 1, characterized in that: The flow direction of the check valve (11) is from the glass tube water level gauge (10) to the boiler drum (13).

5. The boiler water level gauge burst automatic closing device according to claim 1, characterized in that: The sealing ball (8) is a hollow ball.

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