Waste gas treatment device for cable bunching combustion heat release test

Abstract

The utility model relates to the technical field of cable testing, in particular to a waste gas treatment device for a cable bunched combustion heat release test, which is used for preliminarily filtering waste gas before the waste gas enters a gas conveying pipe and comprises a gas collecting hood, a gas outlet, a gas inlet and a gas outlet, the air inlet is communicated with the air port of the test box, and the air outlet is communicated with the air inlet end of the air delivery pipe. According to the utility model, the gas collecting hood is arranged between the air port of the test box and the gas conveying pipe, and the filter hood is arranged in the gas collecting hood, so that dirt in waste gas can be adsorbed by utilizing the surface of the filter hood, and the fluidity of the dirt attached to the filter hood is improved along with the heating of the high-temperature waste gas to the filter hood; the waste gas flows into the liquid storage tank to be collected along the flow guide surface of the filter cover, and is filtered for the first time, so that pollutants in the waste gas are obviously reduced when the waste gas enters the gas conveying pipe through the meshes on the surface of the filter cover, and the blockage of the gas conveying pipe can be slowed down.

Description

TECHNICAL FIELD

[0001] The utility model relates to cable test technical field especially relates to a kind of waste gas treatment device for cable bunching combustion heat release test. BACKGROUND

[0002] The main purpose of the burning test of the bundled cable is to evaluate the burning characteristics of the cable under fire conditions, the flame spreading ability and the harmfulness of the combustion products. Since the waste gas generated during the burning of the bundled cable usually contains a variety of toxic and harmful substances, if the waste gas is directly discharged, it will cause serious harm to human health and the environment. Therefore, as shown in Figure 1 and Figure 2 At present, the test box is generally used in a closed environment. The test box heats the cable on the test sample holder through the combustion assembly in the test box, and the harmful gas generated is directly sent into the exhaust gas purifier through the air outlet at the top of the test box and the gas conveying pipe for filtration.

[0003] The existing technical problem is that in practice, the waste gas usually contains unburned carbon particles, metal oxides (such as lead, cadmium and other heavy metals) and tar-like substances decomposed from insulating materials, which can adhere to the gas conveying pipe and cause ash accumulation and blockage of the gas conveying pipe, increase the wind resistance and affect the smoke exhaust and purification effect. Therefore, how to effectively solve the problem of easy blockage of the gas conveying pipe is of great practical significance. UTILITY MODEL CONTENTS

[0004] Therefore, the purpose of the utility model is to provide a waste gas treatment device for cable bunching combustion heat release test to solve the technical problem of easy blockage and pollution of the gas conveying pipe of the existing cable burning test device during use.

[0005] Based on the above purpose, the utility model provides a waste gas treatment device for cable bunching combustion heat release test for preliminary filtering of waste gas before entering the gas conveying pipe, comprising:

[0006] The gas collecting cover is hollow inside and has a gas outlet and a gas inlet at the upper and lower ends respectively, the gas inlet is connected with the air inlet of the test box, and the gas outlet is connected with the gas inlet end of the gas conveying pipe;

[0007] The filter cover has mesh on the surface, and the filter cover is arranged at one end of the gas collecting cover close to the gas inlet, so that when the high-temperature waste gas contacts the filter cover, the dirt attached to the surface of the filter cover is heated to improve its flowability, and the filter cover is narrow at the top and wide at the bottom to form a flow guide surface for guiding the flow of dirt;

[0008] The liquid storage tank is arranged at the lower end of the filter cover for receiving the dirt flowing from the flow guide surface.

[0009] As the preferred technical scheme of the utility model, the device further comprises:

[0010] The spray head is arranged at the lower end of the filter cover and points to the flow guide surface.

[0011] The water tank, the pump and the conduit for inputting the cleaning liquid in the water tank into the spray head.

[0012] As the preferred technical scheme of the utility model, the flow guide surface has a plurality of, correspondingly, the spray head has a plurality of, the spray head is provided with the integrated box for being connected with each other, the integrated box is communicated with the pump through the conduit.

[0013] As the preferred technical scheme of the utility model, the lower end of the filter cover is provided with a plurality of positioning plates, the surface of the positioning plate is provided with a first mounting hole, the first mounting hole corresponds with the second mounting hole arranged in the inner wall of the gas collecting cover, the first bolt for penetrating the first mounting hole and the second mounting hole is arranged between the first mounting hole and the second mounting hole.

[0014] As the preferred technical scheme of the utility model, the surface of the positioning plate is provided with the third mounting hole, the second bolt is arranged in the third mounting hole, the recess is arranged at the lower end of the liquid storage groove, and the second bolt is in contact with the recess or separated from the recess by rotating the second bolt to move along the axial direction.

[0015] As the preferred technical scheme of the utility model, the lower end of the filter cover is provided with the support, and the support is rotatably connected with the spray head.

[0016] As the preferred technical scheme of the utility model, the flange for connecting the gas conveying pipe is arranged at the gas outlet of the gas collecting cover.

[0017] As the preferred technical scheme of the utility model, the gas outlet of the gas collecting cover is smaller than the gas inlet to slow down the flow rate of flue gas.

[0018] The utility model discloses the beneficial effect: the utility model discloses the gas collecting cover between the tuyere of test box and gas conveying pipe is set up, and the filter cover is set up in the gas collecting cover, can utilize the dirt in the surface adsorption of filter cover in waste gas, and with the heating of filter cover to high-temperature waste gas, make the dirt flowing property of adhering on filter cover improve, flow into the liquid storage groove along the flow guide surface of filter cover and collect, because having passed primary filtration, when waste gas enters the gas conveying pipe again through the mesh of filter cover surface, the pollutants in waste gas have reduced obviously, so can slow down the blockage of gas conveying pipe. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to make the technical scheme of the present application or the prior art clearer, the drawings needed in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only the present application, and other drawings can be obtained by those skilled in the art without creative labor on the premise of not paying creative labor.

[0020] Figure 1 It is a sectional view of the test box according to the present application;

[0021] Figure 2 It is a sectional view of the test box according to the present application;

[0022] Figure 3 It is a sectional view of the gas collecting hood according to the present application;

[0023] Figure 4 It is a sectional view of the bottom end of the filter cover according to the present application;

[0024] Figure 5 It is a sectional view of the bottom end of the filter cover according to the present application; Figure 4 It is an enlarged structure diagram of A in the middle of the present application;

[0025] Figure 6 It is a sectional view of the liquid storage tank according to the present application.

[0026] In the figure, the marks are: 1, test box; 2, test sample holder; 3, cable; 4, combustion assembly; 5, air inlet; 6, gas collecting hood; 7, gas conveying pipe; 8, exhaust gas purifier; 9, air inlet; 10, air outlet; 11, flange; 12, filter cover; 13, mesh; 14, positioning plate; 15, first mounting hole; 16, first bolt; 17, second mounting hole; 18, liquid storage tank; 19, groove; 20, third mounting hole; 21, second bolt; 22, support; 23, spray head; 24, water tank; 25, pump; 26, conduit; 27, integrated box. DETAILED DESCRIPTION

[0027] In order to make the technical scheme of the present application or the prior art clearer, the drawings needed in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only the present application, and other drawings can be obtained by those skilled in the art without creative labor on the premise of not paying creative labor.

[0028] It should be noted that, unless otherwise defined, technical or scientific terms used in the present application should be understood as their common meanings to those skilled in the art to which the present application belongs. In the present application, "first", "second" and similar words do not represent any order, quantity or importance, but are only used to distinguish different components. "Include" or "contain" and similar words mean that the elements or objects before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connected" or "connected" and similar words are not limited to physical or mechanical connection, but can include electrical connection, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to represent relative positional relationship, which may change accordingly when the absolute position of the described object changes.

[0029] As shown in Figure 1 , Figure 2 , Figure 3 and Figure 4 , a kind of exhaust gas treatment device for cable bundle combustion heat release test, for preliminary filtration to exhaust gas before exhaust gas enters gas conveying pipe 7, comprising: gas collecting cover 6 with hollow inside and upper and lower ends are provided with gas outlet 10 and gas inlet 9 respectively, gas inlet 9 is connected with the air inlet 5 of test box 1, gas outlet 10 is connected with the gas inlet end of gas conveying pipe 7;Filter cover 12 with mesh 13 on the surface, filter cover 12 is arranged at one end of gas collecting cover 6 close to gas inlet 9, so that when high-temperature exhaust gas contacts filter cover 12, the dirt adhered to the surface of filter cover 12 is heated to improve its flowability, filter cover 12 is narrow at the top and wide at the bottom to form a flow guide surface to guide the flow of dirt;Liquid storage tank 18 arranged at the lower end of filter cover 12 for receiving dirt flowing from the flow guide surface;

[0030] The above technical scheme can effectively reduce the dirt entering the gas conveying pipe 7. When the combustion assembly 4 in the test box 1 burns the cable 3 placed on the sample holder 2, the exhaust gas purifier 8 draws the exhaust gas from the air inlet 5 through the gas conveying pipe 7 and the gas collecting cover 6. When the exhaust gas passes through the filter cover 12, the unburned carbon particles, metal oxides and tar-like substances decomposed by the insulating material in the exhaust gas will adhere to the filter cover 12, forming dirt. Then, with the heating of the filter cover 12 by the high-temperature exhaust gas, the temperature of the surface of the filter cover 12 gradually rises, so that the flowability of the dirt adhered to the filter cover 12 is improved. The dirt flows along the flow guide surface of the filter cover 12 into the liquid storage tank 18. Since the exhaust gas has been subjected to primary filtration, the pollutants in the exhaust gas have been significantly reduced when the exhaust gas passes through the mesh 13 on the surface of the filter cover 12 and enters the gas conveying pipe 7, so that the blockage of the gas conveying pipe 7 can be slowed down. When the liquid storage tank 18 is full of dirt, it needs to be disassembled and cleaned and maintained.

[0031] AsFigure 1 , Figure 3 and Figure 4 As shown, in this embodiment, the device further includes: a nozzle 23 disposed at the lower end of the filter cover 12, the nozzle 23 pointing towards the guide surface; a bracket 22 disposed at the lower end of the filter cover 12, the bracket 22 being rotatably connected to the nozzle 23; a water tank 24, and a pump 25 and a conduit 26 for inputting the cleaning liquid in the water tank 24 into the nozzle 23; specifically, there are four guide surfaces, and correspondingly, there are four nozzles 23, and an integrated box 27 for connecting them in series is disposed between the nozzles 23, the integrated box 27 being connected to the pump 25 through the conduit 26;

[0032] The above technical solution can clean the guide surface of the filter cover 12 regularly. When in use, the pump 25 is started to inject the cleaning liquid in the water tank 24 into each nozzle 23 through the conduit 26 and the integrated box 27. The cleaning liquid is then sprayed onto the guide surface of the filter cover 12 at a certain pressure through the nozzle 23, thereby reducing the adhesion of dirt and achieving self-cleaning of the guide surface of the filter cover 12. The nozzle 23 is mounted on the filter cover 12 through the bracket 22, so the spray direction can be adjusted by rotating the nozzle 23 relative to the bracket 22.

[0033] like Figure 3 , Figure 4 and Figure 5 As shown, in this embodiment, the lower end of the filter cover 12 is provided with a plurality of positioning plates 14. The surface of the positioning plate 14 is provided with a first mounting hole 15. The first mounting hole 15 corresponds to the second mounting hole 17 opened on the inner wall of the gas collection cover 6. A first bolt 16 for passing through the second mounting hole 17 and the first mounting hole 15 is provided between the second mounting hole 17 and the first mounting hole 15.

[0034] The above technical solution allows the filter cover 12 to be detachably installed in the air collection hood 6. When it is necessary to remove the filter cover 12, the first bolt 16 installed in the first mounting hole 15 and the second mounting hole 17 can be unscrewed with a tool to release the first bolt 16 from the filter cover 12, thereby removing the filter cover 12 from the air collection hood 6. The filter cover 12 can be removed through the air outlet 5 of the test chamber 1.

[0035] like Figure 4 , Figure 5 and Figure 6 As shown, in this embodiment, a third mounting hole 20 is provided on the surface of the positioning plate 14, and a second bolt 21 is provided in the third mounting hole 20. A groove 19 is provided at the lower end of the liquid storage tank 18. By rotating the second bolt 21 to move it in the axial direction, the second bolt 21 can be made to abut or disengage from the groove 19.

[0036] The technical scheme can conveniently detach the liquid storage tank 18 from the filter cover 12, when the liquid storage tank 18 needs to be detached, the second bolt 21 is rotated to be completely received in the third mounting hole 20, so that the second bolt 21 is out of contact with the groove 19, and the liquid storage tank 18 can be slid downward and pulled out.

[0037] As shown in Figure 1 and Figure 3 In the embodiment, a flange 11 for connecting the gas conveying pipe 7 is arranged at the gas outlet 10 of the gas collecting cover 6; the gas outlet 10 of the gas collecting cover 6 is smaller than the gas inlet 9 to slow down the flue gas flow rate;

[0038] The technical scheme can connect the gas collecting cover 6 and the gas conveying pipe 7 through the flange 11.

[0039] Working principle: when the combustion assembly 4 in the test box 1 burns the cable 3 placed on the test sample rack 2, the exhaust gas purifier 8 draws the exhaust gas from the air outlet 5 through the gas conveying pipe 7 and the gas collecting cover 6, when the exhaust gas passes through the filter cover 12, the unburned carbon particles, metal oxides and tar-like substances decomposed by the insulating material in the exhaust gas will adhere to the filter cover 12 to form dirt, then with the heating of the filter cover 12 by the exhaust gas, the surface temperature of the filter cover 12 gradually rises, so that the flowability of the dirt adhering to the filter cover 12 is improved, the dirt flows into the liquid storage tank 18 along the flow guide surface of the filter cover 12, since the exhaust gas has been subjected to primary filtration, when the exhaust gas passes through the mesh 13 on the surface of the filter cover 12 to enter the gas conveying pipe 7 again, the pollutants in the exhaust gas have been significantly reduced, so that the blockage of the gas conveying pipe 7 can be slowed down;

[0040] When the flow guide surface of the filter cover 12 needs to be cleaned, the pump 25 is started to inject the cleaning liquid in the water tank 24 into each spray head 23 through the conduit 26 and the integrated box 27, so that the cleaning liquid is accurately sprayed to the flow guide surface of the filter cover 12 at a certain pressure through the spray head 23, thereby reducing the adhesion of the dirt and achieving self-cleaning of the flow guide surface of the filter cover 12, the spray head 23 is installed on the filter cover 12 through the bracket 22, so that the spray head 23 can be rotated relative to the bracket 22 by rotating the spray head 23 to adjust the spray direction;

[0041] When the liquid storage tank 18 is full of dirt, it needs to be detached and cleaned and maintained, when the liquid storage tank 18 is detached, the second bolt 21 is rotated to be completely received in the third mounting hole 20, so that the second bolt 21 is out of contact with the groove 19, and the liquid storage tank 18 can be slid downward and pulled out.

[0042] It should be understood by those of ordinary skill in the art that the above discussion of any of the embodiments is merely exemplary and is not intended to suggest that the scope of the present application includes only these examples; the above embodiments or technical features among different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of the present application as above, which are not provided in detail for the sake of brevity.

[0043] The present application is intended to cover all such alternatives, modifications, and variations as fall within the broad scope of the appended claims. Accordingly, any and all such alternatives, modifications and variations should be included within the scope of the present application.

Claims

1. An exhaust gas treatment device for a cable bundle burning heat release test for performing preliminary filtration of exhaust gas before the exhaust gas enters a gas delivery pipe (7), characterized in that, The device comprises: a gas collecting cover (6) which is hollow inside and has a gas outlet (10) and a gas inlet (9) at its upper and lower ends respectively, the gas inlet (9) being connected to the air inlet (5) of the test box (1), and the gas outlet (10) being connected to the gas inlet end of the gas conveying pipe (7); a filter cover (12) having meshes (13) on its surface, the filter cover (12) being arranged at the end of the gas collecting cover (6) close to the gas inlet (9) so as to heat the dirt attached to the surface of the filter cover (12) when the high-temperature exhaust gas contacts the filter cover (12) to improve the flowability of the dirt, and the filter cover (12) being narrow at the top and wide at the bottom to form a flow guide surface for guiding the flow of the dirt; a liquid storage tank (18) arranged at the lower end of the filter cover (12) for receiving the dirt flowing from the flow guide surface.

2. The exhaust treatment device for cable bundle burning heat release test according to claim 1, characterized in that, The device further comprises: a spray head (23) arranged at the lower end of the filter cover (12), the spray head (23) being directed towards the flow guide surface; a water tank (24), and a pump (25) and a conduit (26) for inputting the cleaning liquid in the water tank (24) into the spray head (23).

3. The exhaust treatment device for cable bundle burning heat release test according to claim 2, characterized in that, The flow guide surface has a plurality of corresponding spray heads (23), and the spray heads (23) are provided with an integrated box (27) for being connected to each other in series, the integrated box (27) being connected to the pump (25) through the conduit (26).

4. The exhaust treatment device for cable bundle burning heat release test according to claim 1, characterized by The lower end of the filter cover (12) is provided with a plurality of positioning plates (14), the surface of the positioning plate (14) is provided with a first mounting hole (15), the first mounting hole (15) corresponds to a second mounting hole (17) provided in the inner wall of the gas collecting cover (6), and a first bolt (16) is arranged between the first mounting hole (15) and the second mounting hole (17) for penetrating both holes.

5. The exhaust treatment device for cable bundle burning heat release test according to claim 4, characterized in that, The surface of the positioning plate (14) is provided with a third mounting hole (20), a second bolt (21) is arranged in the third mounting hole (20), and a recess (19) is provided at the lower end of the liquid storage tank (18), the second bolt (21) can be in contact with or separated from the recess (19) by rotating the second bolt (21) to move it in the axial direction.

6. The exhaust treatment device for cable bundle burning heat release test according to claim 1, characterized in that, The lower end of the filter cover (12) is provided with a bracket (22), and the bracket (22) is rotatably connected to the spray head (23).

7. The exhaust treatment device for cable bundle burning heat release test according to claim 1, characterized in that, The gas outlet (10) of the gas collecting cover (6) is provided with a flange (11) for connecting the gas conveying pipe (7).

8. The exhaust treatment device for cable bundle burning heat release test according to claim 1, characterized in that, The gas outlet (10) of the gas collecting cover (6) is smaller than the gas inlet (9) to slow down the flow rate of the flue gas.

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