Reducer heating device of movable belt conveyor

Abstract

The utility model discloses a movable belt conveyor speed reducer heating device, and relates to the technical field of heating devices. Comprising a frame installed outside the speed reducer, an aluminum foil composite silicate heat preservation plate is installed between the frame and a shell of the speed reducer and used for conducting heat preservation on the speed reducer, and a heat tracing cable is installed on the speed reducer. The speed reducer is not affected by the outdoor environment temperature, the situation that the speed reducer cannot be normally started due to the fact that gear oil in the speed reducer is thick and solidified due to environment temperature reduction is avoided, and the application range of the speed reducer of the movable belt conveyor is expanded.

Description

TECHNICAL FIELD

[0001] The utility model belongs to heating device technical field, especially relates to a portable belt conveyor reducer heating device. BACKGROUND

[0002] The portable belt conveyor reducer is a part of the portable belt conveyor driving device, and provides low-speed large-torque power for the belt conveyor. At present, the portable belt conveyor reducer is a fully exposed device, which comprises a reducer box, a high-speed transmission shaft, a low-speed output shaft and the like. Although a heating device is arranged in the reducer box, it cannot meet the outdoor use in the severe cold weather in the north in winter, and does not have the heat preservation function. When the outdoor temperature is higher than minus twenty-five degrees, even if the low-viscosity gear oil is used in winter, the device cannot be normally started due to the thick and even solidified gear oil in the reducer, thereby limiting the normal outdoor use of the portable belt conveyor in the north in winter. SUMMARY

[0003] In view of the defects in the prior art, the utility model aims to provide a portable belt conveyor reducer heating device to solve the problem that the reducer is easily damaged in extreme weather.

[0004] The utility model adopts the technical scheme of a portable belt conveyor reducer heating device, which has the technical points that a frame is installed outside the reducer, an aluminum-foil composite silicate heat preservation plate is installed between the frame and the reducer shell for heat preservation of the reducer, a heat tracing cable is installed on the reducer, a first heat tracing cable is bound to the center of the tooth surface of the reducer, and a second heat tracing cable and a third heat tracing cable are bound to the reducer shell at equal intervals from top to bottom, the three heat tracing cables are connected to the heat tracing cable power loop in the heat tracing cable power supply control switch box to control the electric heating process of the heat tracing cable and make the reducer work in the normal temperature range.

[0005] In the above scheme, the frame is composed of a front end face frame, a rear end face frame, a first adjusting beam, a second adjusting beam and a third adjusting beam, the front end face frame and the rear end face frame are the same in structure and are both day-shaped planar frames composed of an upper end face beam, a left frame beam, a lower end face beam and a right frame beam.

[0006] In the above scheme, a temperature sensor for detecting the temperature of the reducer is installed on the reducer.

[0007] In the above scheme, the aluminum-foil composite silicate heat preservation plate is connected to the reducer shell according to the shape of the reducer.

[0008] In the above scheme, the power supply from the low-voltage distribution cabinet of the nearby box-type substation is connected to the power loop of the heat tracing cable, the total power supply of the heat tracing cable power loop is air switch 2UQ, the branch circuit power supply is air switch 2UQ.1, the branch circuit L and N lines are connected to the normally open contact of contactor KM41, and the heat tracing cable BR of the electric equipment is connected in series with the contactor KM41; in the case that 2UQ and 2UQ.1 are closed, the heat tracing cable of the electric equipment is started and stopped by controlling the power-on and power-off of the coil of KM41.

[0009] The movable belt conveyor reducer heating device of the utility model has the advantages that the movable belt conveyor reducer can be used in the severe cold weather in the north in winter, is not affected by the outdoor ambient temperature, avoids the problem that the reduction gear cannot be normally started due to the thickening and solidification of the gear oil in the reduction gear caused by the reduction of the ambient temperature, and expands the application range of the movable belt conveyor reducer. BRIEF DESCRIPTION OF DRAWINGS

[0010] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiments will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the drawings.

[0011] Figure 1 It is a structure schematic view of the movable belt conveyor reducer heating device of the embodiment of the utility model.

[0012] Figure 2 It is an installation schematic view of the aluminum foil composite silicate insulation board in the embodiment of the utility model.

[0013] Figure 3 It is a schematic view of the connection between the low-voltage distribution cabinet of the box-type substation and the heat tracing cable power loop in the embodiment of the utility model.

[0014] Figure 4 It is a schematic view of the contactor KM41 connected in series with the heat tracing cable of the electric equipment in the embodiment of the utility model.

[0015] Figure 5 It is a schematic view of the manual control and automatic control in the embodiment of the utility model.

[0016] Figure 6 It is a schematic view of the connection between the heat tracing cable power loop and the controller in the embodiment of the utility model.

[0017] Figure 7 It is a schematic view of the temperature module of the reduction gear in the embodiment of the utility model.

[0018] Figure 8This is a schematic diagram of the overall temperature module of the reducer in this embodiment of the present invention.

[0019] The numbers in the diagram are explained as follows: 1. Left frame beam, 2. Front end frame, 3. Lower end frame beam, 4. Rear end frame, 5. Right frame beam, 6. Aluminum foil composite silicate insulation board, 7. Upper end beam, 8. Reducer, 9. First adjusting beam, 10. Second adjusting beam, 11. Third adjusting beam, 12. Positioning hole, 13. Heating cable, 14. Near-box type substation low-voltage distribution cabinet. Detailed Implementation

[0020] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the following description is provided in conjunction with the appendix. Figures 1-8 The present invention will be further described in detail below with reference to specific embodiments.

[0021] The portable belt conveyor reducer heating device used in this embodiment has the following structure:

[0022] In this embodiment, a frame is installed outside the reducer 8. The frame is a rectangular frame with one open side, consisting of a front face frame 2, a rear face frame 4, and a second adjusting beam 9, a first adjusting beam 10, and a third adjusting beam 11 connecting the two. Both the front and rear face frames are U-shaped planar frames, which are bolted to the three adjusting beams via positioning holes 12. The U-shaped planar frames are composed of an upper end beam 7, a left frame beam 1, a lower end beam 3, and a right frame beam 5. The reducer 8 is installed inside the rectangular frame, and its base is mounted on the first adjusting beam 10. Bolts are inserted into the adjusting holes on the first connecting beam 10 and the pre-drilled bolt holes on the reducer base, and the first adjusting beam 10 is then tightened to secure it. Install the tail connecting beam of the reducer on the lower end beam 3 of the H-shaped flat frame, and install the upper connecting beam of the reducer on the upper end beam 7 of the H-shaped flat frame. Tighten the bolts through the positioning holes of the H-shaped flat frame and the adjustment holes of the first adjustment beam 10 to fix it.

[0023] In this embodiment, an aluminum foil composite silicate insulation board 6 is installed between the cuboid frame and the reducer housing. The second adjustment beam 9 and the first adjustment beam 10 are adjusted according to the reducer's shape and the reserved space for the insulation material. The dimensions of the front and rear ends are adjusted using clamps and tightening bolts. After adjustment, positioning pins are inserted into the adjustment holes, and all connecting bolts are tightened. Insulation material installation method: The aluminum foil composite silicate insulation board 6 is cut to fit the left, right, top, and rear sides of the reducer. Irregular areas of the reducer are filled with the aluminum foil composite silicate insulation board 6, forming the four sides of the insulation structure. No insulation structure is installed on the input shaft fan side and bottom. The insulation structure is installed on the front and rear metal frames using flexible pressure strips. The bottom of the heating and insulation device connected to the reducer and the input shaft fan area are sealed with self-adhesive insulation material.

[0024] Heating facilities are installed. In this embodiment, three heat tracing cables 13 are used. The first heat tracing cable is installed 100mm below the center of the gear surface of the reducer 8. The other two heat tracing cables are tied to the reducer housing from top to bottom at 150mm intervals. The three heat tracing cables are respectively connected to the heat tracing cable power circuit in the power control switch box.

[0025] In this embodiment, the power circuit for the heat tracing cable is powered by a 220V source from the low-voltage distribution cabinet 14 of a nearby prefabricated substation. Lines KL and KN are connected to the power circuit. The main power supply for the heat tracing cable power circuit is an air switch 2UQ (32A), and branch circuit power supplies are supplied by air switches 2UQ.1 (6A). The L and N lines of the branch circuits are connected to the normally open contacts of contactor KM41, which is connected in series with the heat tracing cable BR of the electrical equipment. When 2UQ and 2UQ.1 are closed, the start and stop of the heat tracing cable are controlled by controlling the energization of the KM41 coil.

[0026] Control circuit: It can be controlled manually or automatically, with the manual / automatic switch being S1. Opening S1 is controlled manually, and closing S1 is controlled automatically.

[0027] When manual control is used, S2 and S3 control the start and stop respectively. For manual start, manually closing S2 energizes relay K3, causing its normally open contact to engage. This power is input via PLC channel 3DI4.1, and the PLC controls relays 1K61 and 1K62 via DO9.4 and DO9.5. Relay 1K61 is energized, and the KM41 coil is energized, causing it to engage. The heating cable of the equipment is powered and runs, and relay 1K62 is energized, causing the H2 running indicator light to operate. For manual stop, manually closing S3 de-energizes relay K4, causing its normally open contact to engage. This power is input via PLC channel 3DI4.2, and the PLC controls relays 1K61 and 1K62 to de-energize via DO9.4 and DO9.5. Relay 1K61 is de-energized, and the KM41 coil is de-energized, causing it to disengage. The heating cable of the equipment is de-energized and stops operating, and relay 1K62 and the H2 running indicator light are de-energized and stop operating.

[0028] When automatic control is used, S1 closes, relay K2 is energized, and the normally open contact of K2 is energized. This energization is input via the 3DI4.0 channel of the input module, and the PLC automatically commands the operation. The PLC transmits a 24V 4~20mA electrical signal to the RELIANCE temperature module (1A1 02, 1A1 COM) to determine whether 1K61 and 1K62 are energized, thereby controlling whether the KM41 coil is energized, and whether the heating cable of the electrical equipment and the running indicator light H2 are energized.

[0029] The manufacturing process of the portable belt conveyor reducer heating device used in this embodiment is as follows:

[0030] The specific steps for installing and commissioning the heating system are as follows:

[0031] Step 1.1: Install the BR01 heat tracing cable 13 100mm below the center of the gear tooth surface of the reducer housing and fix it in place;

[0032] Step 1.2: Install the BR02 heat tracing cable 13 on the reducer housing, 150mm below BR01, and secure it.

[0033] Step 1.3: Install the BR03 heat tracing cable 13 on the reducer housing, 150mm below BR02, and secure it.

[0034] Step 1.4: Connect the power supply line of the heat tracing cable to the power circuit of the heat tracing cable where the contactor KM41 of the AP04 power control switch box is located;

[0035] Step 1.5: Connect the normally open auxiliary contact of contactor 13.14 to the PLC switch output module D09 6ES7 521-1FHD0-0AA0 230VAC 4DO 9.4;

[0036] Step 1.6: Use the analog input of the temperature sensor PT100 built into the reducer as the on / off condition. If the PT100 input signal determines that the temperature is less than -15℃, relay 1K61 will be energized, KM41 will be powered on, and the heating cable will start heating. If the PT100 input signal determines that the temperature is greater than 10℃, relay 1K61 will be de-energized, and KM41 will be de-energized and disconnected. The installation and commissioning of the heating device are now complete.

[0037] Step 2, Insulation system installation, the specific steps are as follows:

[0038] Step 2.1: Cut aluminum foil composite silicate insulation board 6 according to the four sides of the reducer (top, back, left, and right), and fill in the gaps according to the outer dimensions of the reducer;

[0039] Step 2.2: Install the insulation structure obtained in Step 2.1 onto the rigid structure using flexible pressure strips;

[0040] Step 2.3: Seal the bottom of the connection between the heating and insulation device and the reducer, and the input shaft fan with self-adhesive insulation material;

[0041] Step 3, rigid structure installation, the specific steps are as follows:

[0042] Step 3.1: Install the lower beam connecting beams 9 and 10 on the reducer base, insert bolts into the adjustment holes of the lower beam connecting beams and the reserved bolt holes of the reducer base, tighten the bolts, and fix the lower beam connecting beams.

[0043] Step 3.2: Install the two side H-shaped planar frames 1 and 2 onto the lower beam connecting beams 9 and 10 using bolts; install the reducer tail connecting beam and upper connecting beam onto the planar frames 1 and 2, insert the bolts into the positioning holes of the planar frames and the adjustment holes of the connecting beams, and tighten the bolts.

[0044] Step 3.3: Adjust connecting beams 9 and 10 according to the shape of the reducer and the reserved space for the insulation material;

[0045] After adjusting in step 3.4, insert the locating pin into the adjusting hole and tighten all connecting bolts.

[0046] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A portable belt conveyor reducer heating device, characterized in that... , including a frame installed outside the reducer. An aluminum foil composite silicate thermal insulation board is installed between the frame and the reducer housing to insulate the reducer. A tracing heating cable is installed on the reducer. The first tracing heating cable is tied below the center of the tooth surface of the reducer. The second and third tracing heating cables are tied to the reducer housing at equal intervals from top to bottom. The three tracing heating cables are respectively connected to the tracing heating cable power circuit in the power control switch box to control the electric heating process of the tracing heating cable, so that the reducer operates within the normal temperature range.

2. The heating device for the portable belt conveyor reducer according to claim 1, characterized in that... , the frame is composed of a front end face frame, a rear end face frame, and the first adjustment beam, the second adjustment beam, and the third adjustment beam that connect the two together. The front end face frame and the rear end face frame have the same structure, and both are a square-shaped plane frame composed of an upper end face beam, a left frame beam, a lower end face beam, and a right frame beam.

3. The heating device for the portable belt conveyor reducer according to claim 1, characterized in that... , a temperature sensor for detecting the temperature of the reducer is installed on the reducer.

4. The heating device for the portable belt conveyor reducer according to claim 1, characterized in that... , the aluminum foil composite silicate thermal insulation board cut according to the outer shape of the reducer is connected to the reducer housing.

5. The heating device for the portable belt conveyor reducer according to claim 1, characterized in that... , the power supply led out from the low-voltage power distribution cabinet of the nearby box-type substation is connected to the tracing heating cable power circuit. The total power supply of the tracing heating cable power circuit is the air switch 2UQ, and the branch circuit power supply is the air switch 2UQ.

1. The branch circuit L and N lines are connected to the normally open contacts of the contactor KM41. The contactor KM41 is connected in series with the electrical equipment tracing heating cable BR. When 2UQ and 2UQ.1 are switched on, the start and stop of the electrical equipment tracing heating cable are controlled by controlling the gain and loss of power of the KM41 coil.

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