Coal feeder butt joint belt tensioning and aligning device and belt butt joint method

Abstract

The invention relates to a coal feeder butt joint belt tensioning and aligning device and a belt butt joint method. The device comprises two sets of belt end clamping mechanisms and a butt joint tensioning mechanism. The two sets of belt end clamping mechanisms are used for clamping and fixing the two ends of a butt joint belt correspondingly and each comprise an upper clamping plate, a lower clamping plate and a clamping plate connecting bolt. Bolt penetrating holes are formed in two ends of the upper and lower clamping plates; the upper clamping plates are transversely arranged above the ends of the butt joint belt, two receding grooves formed in the lower ends of the upper clamping plates are in clearance embedded fit with the two skirt edges of the belt respectively, and the lower clamping plates are arranged below the ends of the butt joint belt and vertically aligned with the corresponding upper clamping plates. Clamping plate connecting bolts penetrate through corresponding bolt penetrating holes in the two ends of the upper clamping plate and the lower clamping plate respectively, and the upper clamping plate and the lower clamping plate are clamped and fixed to the ends of the belt through locking nuts; the butt-joint tensioning mechanism is used for connecting the two sets of belt end clamping mechanisms, so that the two ends of the butt-joint belt are aligned and meshed, and a transversely-through shaft penetrating hole is formed. The belt butt joint device facilitates belt butt joint.

Description

Technical Field

[0001] The invention belongs to the technical field of power generation equipment, and in particular relates to a coal feeder butt-jointing belt tensioning and alignment device and a belt butt-jointing method. Background Art

[0002] In the process of thermal power generation, the coal feeder is used to transport the coal blocks dropped from the coal hopper to the coal mill for grinding. The coal feeder adopts a belt conveyor, and the coal is weighed by a weighing mechanism during the conveying process. During long-term use, the belt may be scratched, worn and aged, and needs to be replaced regularly.

[0003] At present, the belts used on coal feeders are generally one-piece belts. When using this type of belt, it is necessary to remove the support rollers of the belt, the bearing seats at both ends and other accessories before the old belt can be removed and replaced with a new one. This has the disadvantages of being cumbersome to operate, having a long replacement cycle and high maintenance costs. In addition, after the belt is replaced, it is necessary to reinstall and adjust the equipment.

[0004] In order to facilitate the replacement of the belt, a butt-jointed belt is used. Engagement teeth are set at both ends of the belt, and transverse pin holes are set at the engagement teeth. After the two ends of the belt are engaged, the belt can be butt-jointed by inserting the connecting pin shaft. When replacing this butt-jointed belt, it is not necessary to remove the belt roller, bearing seat and other accessories, and the belt can be replaced on the machine.

[0005] When the belts are docked for actual replacement, since the belts are heavy, at least two people are required to dock the belts at both ends, and then one person performs the pinning operation. Although compared with the replacement of a single belt, the operation is simplified and the replacement cycle is shortened, there are still problems of cumbersome operation and high labor costs. Therefore, it is necessary to design an auxiliary device that can achieve belt tightening and alignment to facilitate the belt docking operation and save manpower. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention proposes a coal feeder joint belt tensioning and alignment device and a belt joint method, which can realize on-machine belt replacement, facilitate belt jointing, save manpower, improve belt maintenance efficiency, and reduce maintenance costs.

[0007] One of the above objects of the present invention is achieved by the following technical solution:

[0008] A coal feeder butt-jointed belt tensioning and aligning device, characterized in that it comprises two groups of belt end clamping mechanisms and butt-jointed tensioning mechanisms;

[0009] The two sets of belt end clamping mechanisms are respectively used to realize clamping and fixing of the two ends of the docking belt, and the two sets of belt end clamping mechanisms adopt the same structural form, all of which include an upper clamping plate, a lower clamping plate, and a clamping plate connecting bolt; the width of the upper clamping plate and the lower clamping plate is greater than the width of the belt, and a yield groove is respectively provided at the lower end of the upper clamping plate near the left and right sides of the upper clamping plate; the two ends of the upper clamping plate are provided with bolt penetration holes, and the two ends of the lower clamping plate are provided with two bolt penetration holes corresponding to the two ends of the upper clamping plate; the upper clamping plate is arranged laterally above the end of the docking belt, and the two yield grooves at the lower end of the upper clamping plate are respectively embedded and matched with the gaps at the two skirt edges of the belt, and the lower clamping plate is arranged laterally below the end of the docking belt and is aligned with the corresponding upper clamping plate up and down; a clamping plate connecting bolt is respectively inserted into the bolt penetration holes corresponding to the two ends of the upper clamping plate and the lower clamping plate, and the upper and lower clamping plates are clamped and fixed to the end of the belt through the locking nuts connected with the clamping plate connecting bolts;

[0010] The butt-jointed tensioning mechanism is used to connect two groups of belt end clamping mechanisms so that the two ends of the butt-jointed belts are aligned and engaged with each other to form a transversely penetrating shaft hole.

[0011] Moreover, the docking tensioning mechanism adopts two tensioning screws with ends; left and right screw insertion holes are arranged on the upper clamping plates of the two groups of belt end clamping mechanisms; the two tensioning screws are respectively inserted into the left and right groups of screw insertion holes aligned on the two groups of belt end clamping mechanisms, and locking nuts are respectively installed on the ends of the two tensioning screws. By tightening the locking nuts, the two end ends are gradually approached and the engaging teeth are engaged with each other, so that the docking belt is tightened and aligned.

[0012] Moreover, the docking tensioning mechanism is composed of two guide rods and a double-headed reverse-threaded screw; left and right guide rod mounting holes are arranged on the upper clamping plates of the two groups of belt end clamping mechanisms, and threaded through holes are arranged on the two upper clamping plates between the corresponding guide rod mounting holes, and the rotation directions of the threaded through holes on the two upper clamping plates are opposite; the two guide rods are respectively inserted into the guide rod mounting holes on both sides of the two upper clamping plates, and the threads at both ends of the double-headed reverse-threaded screw are respectively connected with the threaded through holes on the two upper clamping plates; by rotating the double-headed threaded screw, the two ends can be gradually approached and the engaging teeth can be engaged with each other, so as to realize the tensioning and alignment of the docking belt.

[0013] Moreover, two left and right threaded through holes are arranged on the upper clamping plate corresponding to the two sides of the middle part of the belt, and the lower ends of the left and right threaded through holes both adopt a conical hole structure; an auxiliary clamping screw is screwed into each of the left and right threaded through holes, and a conical pressure head is fixedly installed at the lower end of the two auxiliary clamping screws, and the conical head adopts a rubber pressure head, and the two auxiliary clamping screws form a clamping contact with the upper surface of the belt through the conical pressure head.

[0014] The second objective of the present invention is achieved by the following technical solutions:

[0015] A method for butt-jointing a butt-jointed belt based on the above-mentioned butt-jointed belt tensioning device for a coal feeder comprises the following steps:

[0016] Step 1: Clamp and fix two sets of belt end clamping mechanisms at the two ends of the butt-jointed belts respectively; in the case where auxiliary clamping screws are provided, tighten the auxiliary clamping screws to further clamp the end of the belts through the conical pressure head;

[0017] Step 2: The two tensioning screws in the butt-jointed tensioning mechanism are respectively inserted into the rod holes on the upper clamping plates of the two sets of belt end clamping mechanisms, and locking nuts are installed at the ends of the two tensioning screws to realize the pre-connection of the two ends of the butt-jointed belt;

[0018] Step 3: Tighten the two locking nuts alternately to gradually bring the two ends of the butt-jointed belt closer together until they are fully engaged. At this time, the through-shaft holes on the two ends are coaxial along the transverse direction of the belt.

[0019] Step 4: Insert the connecting pin of the docking belt into the through-shaft holes on both ends, and fix axial limit pieces on both ends of the connecting pin;

[0020] Step 5: Loosen the locking nuts at various locations of the device, remove the entire device from the belt, and complete the docking connection of the belt.

[0021] The third object of the present invention is achieved by the following technical solutions:

[0022] A method for butt-jointing a butt-jointed belt based on the above-mentioned butt-jointed belt tensioning device for a coal feeder comprises the following steps:

[0023] Step 1: Connect the upper clamping plates of the two sets of belt end clamping mechanisms through double-threaded screws and two guide rods, and ensure that the upper ends of the two upper clamping plates are flush;

[0024] Step 2, placing the two clamping plates assembled in step 1 above the two ends of the belt;

[0025] Step 3, respectively set the lower clamping plates of the two sets of belt end clamping mechanisms under the two ends of the belt, and align them with the corresponding upper clamping plates, and install the clamping plate connecting bolts and locking nuts at both ends to clamp and fix the two sets of belt end clamping mechanisms at the two ends of the butt-jointed belts; in the case of setting auxiliary clamping screws, tighten the auxiliary clamping screws to further tighten the end of the belt through the conical pressure head;

[0026] Step 4: Rotate the double-ended reverse-threaded screw to gradually bring the two ends of the butt-jointed belt closer together until they are fully engaged. At this time, the through-shaft holes on the two ends are coaxial along the transverse direction of the belt.

[0027] Step 5: Insert the connecting pin of the docking belt into the through-shaft holes on both ends, and fix axial limit pieces on both ends of the connecting pin;

[0028] Step 6: Remove the clamping bolts at both ends, remove the entire device from the belt, and complete the butt connection of the belt.

[0029] The advantages and positive effects of the present invention are:

[0030] The present invention achieves the clamping and fixing of the two ends of the belt to be butted by two groups of belt end clamping mechanisms with the same structure, which are composed of an upper clamping plate, a lower clamping plate, a clamping plate connecting bolt and an auxiliary clamping screw. By connecting the two groups of belt end clamping mechanisms to the butt tensioning mechanism, the two ends can be gradually approached and the bite teeth can be engaged with each other, thereby achieving the tightening and alignment of the butted belt. The use of this device avoids two operators from tightening and butting the belt at both ends, ensures the stability of the tightening and butting of the two ends of the belt during the pinning process, and can achieve on-machine belt replacement, convenient belt butt jointing, save manpower, improve belt maintenance efficiency, and reduce maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of a device for tightening and aligning a belt of a coal feeder according to a first embodiment of the present invention;

[0032] Figure 2 This is a reference diagram (top view) of the use state of the tensioning and aligning device for the butt-jointed belt of a coal feeder according to the first embodiment of the present invention;

[0033] Figure 3 yes Figure 2 AA section view;

[0034] Figure 4 It is a schematic diagram of the overall structure of a device for tightening and aligning a belt of a coal feeder according to a second embodiment of the present invention;

[0035] Figure 5 This is a reference diagram (top view) of the use state of the tensioning and aligning device for the butt-jointed belt of the coal feeder according to the second embodiment of the present invention;

[0036] Figure 6 yes Figure 5 BB cross-sectional view. DETAILED DESCRIPTION

[0037] The structure of the present invention is further described below with reference to the accompanying drawings and by way of examples. It should be noted that the present examples are descriptive rather than restrictive.

[0038] A coal feeder belt tensioning and alignment device, see Figure 1-Figure 6The invention point is: it comprises two sets of belt end clamping mechanisms 1 and a butt-joint tensioning mechanism 2. The two sets of belt end clamping mechanisms are used to clamp and fix the two ends of the butt-jointed belt 3, and the butt-joint tensioning mechanism is used to connect the two sets of belt end clamping mechanisms so that the two ends of the butt-jointed belt are aligned and engaged to form a transverse through-axis hole.

[0039] The two groups of belt end clamping mechanisms adopt the same structural form, and both include an upper clamping plate 1.2, a lower clamping plate 1.3, a clamping plate connecting bolt 1.1, and an auxiliary clamping screw 1.4. The upper clamping plate and the lower clamping plate are set with equal width, and the width is greater than the width of the belt. A clearance groove 1.2.1 is respectively provided at the lower end of the upper clamping plate near the left and right sides, and the width of the clearance groove is greater than the width of the belt group edge 3.1, and the depth of the clearance groove is greater than the height of the belt group edge. The function of the clearance grooves on both sides is to allow the skirts on both sides of the belt to be embedded in a clearance fit manner when clamping the end of the belt, so as to achieve the clearance of the belt skirt. Bolt insertion holes are provided at both ends of the upper clamping plate, and two bolt insertion holes corresponding to the two ends of the upper clamping plate are provided at both ends of the lower clamping plate. The upper clamping plate is transversely arranged above the end of the butt-jointed belt, and the two clearance grooves at the lower end of the upper clamping plate are respectively fitted into the gaps between the two skirt edges of the belt, and the lower clamping plate is transversely arranged below the end of the butt-jointed belt and aligned with the corresponding upper clamping plate up and down. A clamping plate connecting bolt is respectively inserted into the corresponding bolt insertion holes at both ends of the upper clamping plate and the lower clamping plate, and the upper and lower clamping plates are clamped and fixed to the end of the belt through a locking nut connected to the clamping plate connecting bolt.

[0040] The above two groups of belt end clamping mechanisms are connected by a butt-joint tensioning mechanism. In the present invention, the butt-joint tensioning mechanism adopts two structural forms:

[0041] Structural form 1, see Figure 1-Figure 3 The butt-joint tensioning mechanism adopts two tensioning screws 2.1 with ends, and the upper clamping plates of the two sets of belt end clamping mechanisms are provided with left and right screw insertion holes. The two tensioning screws are respectively inserted into the left and right screw insertion holes aligned with the two sets of belt end clamping mechanisms, and locking nuts are respectively installed at the ends of the two tensioning screws. By tightening the locking nuts, the two ends are gradually approached and the bite teeth are engaged with each other, thereby achieving the tension and alignment of the butt-jointed belt.

[0042] Structural form 2, see Figure 4-Figure 6The docking tensioning mechanism is composed of two guide rods 2.2 and a double-headed reverse threaded screw 2.3. The upper clamping plates of the two groups of belt end clamping mechanisms are provided with left and right guide rod mounting holes, and threaded through holes are provided between the corresponding guide rod mounting holes on the two upper clamping plates. The threaded through holes on the two upper clamping plates have opposite rotation directions. The two guide rods are respectively installed in the guide rod mounting holes on both sides of the two upper clamping plates, and the threads at both ends of the double-headed reverse threaded screw are respectively connected to the threaded through holes on the two upper clamping plates. By rotating the double-headed threaded screw, the two ends can be gradually approached and the bite teeth can be engaged with each other, thereby realizing the tensioning and alignment of the docking belt. In the process of the two ends of the belt approaching, the above-mentioned two guide rods play a guiding role.

[0043] Due to the wideness of the docking belt, in order to ensure the firmness of the belt clamping mechanism at the end of the belt, two left and right threaded through holes are further provided on the upper clamping plate corresponding to the positions on both sides of the middle of the belt. The lower ends of the left and right threaded through holes adopt a conical hole structure. An auxiliary clamping screw is screwed into each of the left and right threaded through holes. A conical pressure head 1.5 (small on the top and large on the bottom) is fixedly installed at the lower ends of the two auxiliary clamping screws. The two auxiliary clamping screws form a pressing contact with the upper surface of the belt through the conical pressure head. In order to avoid scratches or damage to the belt surface caused by the conical pressure head, the conical pressure head adopts a rubber material pressure head.

[0044] A method for butt-jointing a butt-jointing belt of a coal feeder butt-jointing belt tensioning device based on the above-mentioned structural form 1, the invention point is that it comprises the following steps:

[0045] Step 1: Clamp and fix two sets of belt end clamping mechanisms at the two ends of the butt-jointed belts respectively; in the case where auxiliary clamping screws are provided, tighten the auxiliary clamping screws to further clamp the end of the belts through the conical pressure head;

[0046] Step 2: Install the two tensioning screws in the butt-jointed tensioning mechanism into the rod holes on the upper clamping plates of the two sets of belt end clamping mechanisms respectively, and install locking nuts on the ends of the two tensioning screws to achieve the pre-connection of the two ends of the butt-jointed belt;

[0047] Step 3: Tighten the two locking nuts alternately to gradually bring the two ends of the butt-jointed belt closer together until they are fully engaged. At this time, the through-shaft holes on the two ends are coaxial along the transverse direction of the belt.

[0048] Step 4: Insert the connecting pin of the butt-jointed belt into the through-shaft holes on both ends, and fix axial limiters on both ends of the connecting pin. The axial limiters at both ends can be cotter pins or other structural parts that can achieve axial limit;

[0049] Step 5: Loosen the locking nuts at various locations on the device and remove the entire device from the belt to complete the belt docking connection.

[0050] A method for butt-jointing a butt-jointing belt of a coal feeder butt-jointing belt tensioning device based on the second structural form, the invention point is that it comprises the following steps:

[0051] Step 1: Connect the upper clamping plates of the two sets of belt end clamping mechanisms through a double-threaded screw and two guide rods, and ensure that the upper ends of the two upper clamping plates are flush.

[0052] Step 2: Place the two clamping plates assembled in step 1 above the two ends of the belt.

[0053] Step 3: Set the lower clamping plates of the two sets of belt end clamping mechanisms under the two ends of the belt respectively, and align them with the corresponding upper clamping plates respectively, and install the clamping plate connecting bolts and locking nuts at both ends to clamp and fix the two sets of belt end clamping mechanisms at the two ends of the butt belt respectively; when setting the auxiliary clamping screw, tighten the auxiliary clamping screw to further tighten the end of the belt through the conical pressure head.

[0054] Step 4: Rotate the double-ended reverse-threaded screw to gradually bring the two ends of the docking belt closer together until they are fully engaged. At this time, the through-shaft holes on the two ends are coaxial along the transverse direction of the belt.

[0055] Step 5: Insert the connecting pin of the docking belt into the through-shaft holes on both ends, and fix axial limiters on both ends of the connecting pin; the axial limiters at both ends can be cotter pins or other structural parts that can achieve axial limit.

[0056] Step 6: Remove the clamping bolts at both ends and remove the entire device from the belt to complete the belt connection.

[0057] Although the embodiments and drawings of the present invention are disclosed for illustrative purposes, those skilled in the art will appreciate that various substitutions, changes and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. A coal feeder butt belt tensioning and alignment device, characterized in that: It includes two sets of belt end clamping mechanisms and a butt tightening mechanism; The two sets of belt end clamping mechanisms are respectively used to realize clamping and fixing of the two ends of the docking belt, and the two sets of belt end clamping mechanisms adopt the same structural form, all of which include an upper clamping plate, a lower clamping plate, and a clamping plate connecting bolt; the width of the upper clamping plate and the lower clamping plate is greater than the width of the belt, and a yield groove is respectively provided at the lower end of the upper clamping plate near the left and right sides of the upper clamping plate; the two ends of the upper clamping plate are provided with bolt penetration holes, and the two ends of the lower clamping plate are provided with two bolt penetration holes corresponding to the two ends of the upper clamping plate; the upper clamping plate is arranged laterally above the end of the docking belt, and the two yield grooves at the lower end of the upper clamping plate are respectively embedded and matched with the gaps at the two skirt edges of the belt, and the lower clamping plate is arranged laterally below the end of the docking belt and is aligned with the corresponding upper clamping plate up and down; a clamping plate connecting bolt is respectively inserted into the bolt penetration holes corresponding to the two ends of the upper clamping plate and the lower clamping plate, and the upper and lower clamping plates are clamped and fixed to the end of the belt through the locking nuts connected with the clamping plate connecting bolts; The butt-jointed tensioning mechanism is used to connect two groups of belt end clamping mechanisms so that the two ends of the butt-jointed belts are aligned and engaged with each other to form a transversely penetrating shaft hole.

2. The coal feeder butt-jointed belt tensioning and alignment device according to claim 1 is characterized in that: The docking tensioning mechanism adopts two tensioning screws with ends; left and right screw insertion holes are arranged on the upper clamping plates of the two groups of belt end clamping mechanisms; the two tensioning screws are respectively inserted into the left and right groups of screw insertion holes aligned on the two groups of belt end clamping mechanisms, and locking nuts are respectively installed on the ends of the two tensioning screws. By tightening the locking nuts, the two ends are gradually approached and the engaging teeth are engaged with each other, so that the docking belt is tightened and aligned.

3. The coal feeder butt-joint belt tensioning and alignment device according to claim 1, characterized in that: The docking tensioning mechanism is composed of two guide rods and a double-headed reverse-threaded screw; left and right guide rod mounting holes are arranged on the upper clamping plates of the two groups of belt end clamping mechanisms, and threaded through holes are arranged between the corresponding guide rod mounting holes on the two upper clamping plates, and the rotation directions of the threaded through holes on the two upper clamping plates are opposite; the two guide rods are respectively inserted into the guide rod mounting holes on both sides of the two upper clamping plates, and the threads at both ends of the double-headed reverse-threaded screw are respectively connected to the threaded through holes on the two upper clamping plates; by rotating the double-headed threaded screw, the two ends can be gradually approached and the engaging teeth can be engaged with each other, so as to realize the tensioning and alignment of the docking belt.

4. The coal feeder butt-jointed belt tensioning and alignment device according to claim 1, characterized in that: Two left and right threaded through holes are arranged on the upper clamp plate corresponding to the two sides of the middle part of the belt, and the lower ends of the left and right threaded through holes both adopt a conical hole structure; an auxiliary clamping screw is screwed into each of the left and right threaded through holes, and a conical pressure head is fixedly installed at the lower end of the two auxiliary clamping screws, and the conical head is a rubber pressure head, and the two auxiliary clamping screws form a clamping contact with the upper surface of the belt through the conical pressure head.

5. A method for butt-jointing the butt-jointed belts of the coal feeder butt-jointed belt tensioning device according to claim 2, characterized in that: The steps include: Step 1: Clamp and fix two sets of belt end clamping mechanisms at the two ends of the butt-jointed belts respectively; in the case where auxiliary clamping screws are provided, tighten the auxiliary clamping screws to further clamp the end of the belts through the conical pressure head; Step 2: The two tensioning screws in the butt-jointed tensioning mechanism are respectively inserted into the rod holes on the upper clamping plates of the two sets of belt end clamping mechanisms, and locking nuts are installed at the ends of the two tensioning screws to realize the pre-connection of the two ends of the butt-jointed belt; Step 3: Tighten the two locking nuts alternately to gradually bring the two ends of the butt-jointed belt closer together until they are fully engaged. At this time, the through-shaft holes on the two ends are coaxial along the transverse direction of the belt. Step 4: Insert the connecting pin of the docking belt into the through-shaft holes on both ends, and fix axial limit pieces on both ends of the connecting pin; Step 5: Loosen the locking nuts at various locations of the device, remove the entire device from the belt, and complete the docking connection of the belt.

6. A method for butt-jointing a butt-jointed belt based on the butt-jointed belt tensioning device of a coal feeder according to claim 3, characterized in that: The steps include: Step 1: Connect the upper clamping plates of the two sets of belt end clamping mechanisms through double-threaded screws and two guide rods, and ensure that the upper ends of the two upper clamping plates are flush; Step 2, placing the two clamping plates assembled in step 1 above the two ends of the belt; Step 3, respectively set the lower clamping plates of the two sets of belt end clamping mechanisms under the two ends of the belt, and align them with the corresponding upper clamping plates, and install the clamping plate connecting bolts and locking nuts at both ends to clamp and fix the two sets of belt end clamping mechanisms at the two ends of the butt-jointed belts; in the case of setting auxiliary clamping screws, tighten the auxiliary clamping screws to further tighten the end of the belt through the conical pressure head; Step 4: Rotate the double-ended reverse-threaded screw to gradually bring the two ends of the butt-jointed belt closer together until they are fully engaged. At this time, the through-shaft holes on the two ends are coaxial along the transverse direction of the belt. Step 5: Insert the connecting pin of the docking belt into the through-shaft holes on both ends, and fix axial limit pieces on both ends of the connecting pin; Step 6: Remove the clamping bolts at both ends, remove the entire device from the belt, and complete the butt connection of the belt.

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