CN-224202734-U - Smoke exhaust pipe blockage testing device

CN224202734UCN 224202734 UCN224202734 UCN 224202734UCN-224202734-U

Abstract

The present disclosure provides a smoke exhaust pipe blocking test device suitable for being installed on a smoke exhaust pipe to change the smoke exhaust amount of the smoke exhaust pipe. The testing device comprises a cylindrical shell, a fixing mechanism arranged on the cylindrical shell and used for fixedly mounting the testing device on a smoke exhaust pipeline, and an air quantity changing assembly arranged in the cylindrical shell. The testing device also comprises a positioning bracket which is fixedly arranged relative to the cylindrical shell and extends through the axis of the cylindrical shell, and a plugging piece which is arranged on the positioning bracket and extends along the axis of the cylindrical shell so as to be contacted with a plurality of blades. By arranging the positioning support and the plugging piece on the cylindrical shell, the cross-section ventilation area in the cylindrical shell can be finely adjusted, and various plugging states including full sealing can be simulated.

Inventors

HUANG JINGCHENG
DU XIN

Assignees

威能(无锡)供热设备有限公司

Dates

Publication Date: 20260505
Application Date: 20250609

Claims (10)

1. The smoke exhaust pipe blockage testing device is suitable for being installed on a smoke exhaust pipe to change the smoke exhaust amount of the smoke exhaust pipe and is characterized by comprising a cylindrical shell, a fixing mechanism arranged on the cylindrical shell and used for fixedly installing the testing device on the smoke exhaust pipe, and an air volume changing component arranged in the cylindrical shell, wherein the air volume changing component comprises a driving mechanism which partially extends out of the cylindrical shell and can move along the circumferential direction, a plurality of blades matched with the driving mechanism, the driving mechanism can be operated to drive the blades to move so as to change the cross-section ventilation area in the cylindrical shell, a positioning bracket which is fixedly arranged relative to the cylindrical shell and extends through the axis of the cylindrical shell, and a blocking piece which is arranged on the positioning bracket and extends along the axis of the cylindrical shell so as to be contacted with the blades.
2. The smoke evacuation tube occlusion test device of claim 1 wherein the positioning bracket comprises at least one radially extending positioning rod.
3. The smoke exhaust pipe blocking test device according to claim 2, wherein the at least one positioning rod is provided with a through hole at the axial position of the cylindrical shell, and the blocking piece extends through the through hole.
4. The smoke exhaust pipe blockage testing device according to claim 2, wherein the positioning support comprises a plurality of positioning rods distributed at equal angular intervals, the positioning rods are intersected at the axial position of the cylindrical shell, and the blocking piece is fixedly arranged at the intersection of the positioning rods.
5. The smoke tube plugging testing device according to claim 1, further comprising a smoke sampling tube extending radially through the cylindrical housing, wherein the smoke sampling tube has a connection portion located outside the cylindrical housing and a sampling portion located inside the cylindrical housing, and wherein the sampling portion is provided with a plurality of sampling holes distributed radially.
6. The smoke exhaust pipe blocking test device according to claim 5, wherein the distance between at least two adjacent sampling holes in the plurality of sampling holes is 1/6 of the inner diameter of the cylindrical shell.
7. The smoke exhaust pipe blocking test device according to claim 5 or 6, wherein the apertures of the plurality of sampling holes are all 1mm.
8. The smoke exhaust pipe blocking test device according to claim 1, further comprising a pair of annular limiting blocks disposed in the cylindrical housing, the pair of annular limiting blocks axially clamping the air volume changing assembly therebetween, the positioning bracket being fixedly mounted on one of the annular limiting blocks.
9. The smoke exhaust pipe blockage testing device according to claim 1, wherein the air volume changing assembly further comprises an annular base arranged in the cylindrical shell, the driving mechanism comprises a deflector rod extending out of the cylindrical shell and an annular driving plate accommodated in the annular base, the deflector rod penetrates through the annular base and is fixedly connected with the annular driving plate to drive the annular driving plate to rotate, each blade is provided with a fixed convex column fixedly matched with the annular base and a movable convex column movably matched with the annular driving plate, the fixed convex column and the movable convex column are distributed on two sides of each blade, which are away from each other, the annular base is provided with a first bottom plate, the first bottom plate comprises a plurality of accommodating holes defined on the first bottom plate and used for accommodating the fixed convex columns of the blades respectively, and a first ventilation hole defined in the first bottom plate and used for accommodating the movable convex columns of the blades respectively, the second bottom plate comprises a plurality of sliding grooves defined on the second bottom plate and used for accommodating the movable convex columns of the blades respectively, and a second ventilation hole defined in the second bottom plate and extending along the radial direction, the blades are arranged between the first bottom plate and the second bottom plate are driven to rotate around the corresponding sliding grooves of the first ventilation holes and the second ventilation holes.
10. The smoke tube plugging testing device according to claim 1, wherein the fixing mechanism comprises a threaded hole formed in a circumferential side wall of the cylindrical housing, and a threaded post passing radially through the threaded hole for abutting against the smoke tube.

Description

Smoke exhaust pipe blockage testing device Technical Field The utility model relates to the field of smoke discharge testing of gas equipment, in particular to a testing device for simulating smoke discharge pipeline blockage. Background Gas equipment such as gas water heater, gas hanging stove, lampblack absorber etc. usually discharges the flue gas outdoors through the exhaust gas pipeline. Taking a gas water heater as an example, a combustor, a heat exchanger and a fan are usually arranged in the gas water heater. The fan is used for conveying air required by combustion to the combustor and discharging waste smoke generated by the combustion through the flue. The gas water heater is also internally provided with a wind pressure switch to ensure the normal operation of the fan, and can trigger the gas to be closed in time under the condition of unsmooth smoke exhaust so as to ensure that the gas is not leaked, thereby protecting personal safety. When the gas water heater is tested, the situation that the smoke discharge of the flue is unsmooth, namely the flue is blocked is generally simulated, so that the limit smoke value of the flameout point is obtained. In the prior art, aluminum foil paper is usually stuck to the outlet of the flue after cutting to simulate the situation of blocking the flue. However, the test data are deviated due to the inconsistent mode of blocking the flue and the size of cutting the aluminum foil paper when each person tests, or the test data are suddenly extinguished due to errors during operation, so that the accuracy of the test cannot be ensured. Patent CN218444396U filed earlier by the applicant discloses a smoke blocking test device which uses the movement of the blades to simulate the degree of blocking of the smoke exhaust duct. However, this device cannot simulate a fully occluded condition due to structural limitations of blade movement. Disclosure of utility model The utility model aims to provide a smoke exhaust pipe blockage testing device which can simulate various blockage states of a smoke exhaust pipeline so as to ensure the accuracy of a detection result. In order to achieve the above object, the present utility model provides a smoke exhaust pipe blocking test device, which is suitable for being installed on a smoke exhaust pipe to change the smoke exhaust amount of the smoke exhaust pipe. The testing device comprises a cylindrical shell, a fixing mechanism arranged on the cylindrical shell and used for fixedly mounting the testing device on a smoke exhaust pipeline, and an air quantity changing assembly arranged in the cylindrical shell. The air quantity changing component comprises a driving mechanism which partially extends out of the cylindrical shell and can move along the circumferential direction, and a plurality of blades matched with the driving mechanism. The drive mechanism is operable to drive movement of the plurality of vanes to vary the cross-sectional ventilation area within the cylindrical housing. The testing device also comprises a positioning bracket which is fixedly arranged relative to the cylindrical shell and extends through the axis of the cylindrical shell, and a plugging piece which is arranged on the positioning bracket and extends along the axis of the cylindrical shell so as to be contacted with a plurality of blades. In some embodiments, the positioning bracket includes at least one positioning rod extending in a radial direction. In some embodiments, the at least one positioning rod is provided with a through hole at an axial position of the cylindrical shell, and the blocking member extends through the through hole. In some embodiments, the positioning bracket comprises a plurality of positioning rods distributed at equal angular intervals, the plurality of positioning rods are intersected at the axial position of the cylindrical shell, and the plugging piece is fixedly arranged at the intersection of the plurality of positioning rods. In some embodiments, the test device further comprises a flue gas sampling tube extending radially through the cylindrical housing, the flue gas sampling tube having a connection portion located outside the cylindrical housing and a sampling portion located within the cylindrical housing, the sampling portion being provided with a plurality of sampling holes distributed radially. In some embodiments, at least two adjacent sampling holes of the plurality of sampling holes are spaced 1/6 of the inner diameter of the cylindrical housing. In some embodiments, the apertures of the plurality of sampling holes are each 1 millimeter. In some embodiments, the test device further comprises a pair of annular limiting blocks arranged in the cylindrical shell, the pair of annular limiting blocks clamp the air quantity changing component therebetween in the axial direction, and the positioning bracket is fixedly arranged on one of the annular limiting blocks. In some embodiments, the air volume changing assem