CN114148688A - Drying machine and chain tensioning device thereof - Google Patents
Drying machine and chain tensioning device thereof Download PDFInfo
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- CN114148688A CN114148688A CN202111333196.2A CN202111333196A CN114148688A CN 114148688 A CN114148688 A CN 114148688A CN 202111333196 A CN202111333196 A CN 202111333196A CN 114148688 A CN114148688 A CN 114148688A
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- telescopic cylinder
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- supply system
- tension
- detection mechanism
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- 238000001035 drying Methods 0.000 title claims description 8
- 230000007246 mechanism Effects 0.000 claims abstract description 54
- 238000001514 detection method Methods 0.000 claims abstract description 41
- 239000007788 liquid Substances 0.000 claims description 34
- 238000000034 method Methods 0.000 description 9
- 239000003921 oil Substances 0.000 description 8
- 230000009977 dual effect Effects 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 241000132536 Cirsium Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G23/00—Driving gear for endless conveyors; Belt- or chain-tensioning arrangements
- B65G23/44—Belt or chain tensioning arrangements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G43/00—Control devices, e.g. for safety, warning or fault-correcting
- B65G43/06—Control devices, e.g. for safety, warning or fault-correcting interrupting the drive in case of driving element breakage; Braking or stopping loose load-carriers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Abstract
Provided herein are a dryer and a chain tensioner thereof. The chain tensioning device comprises a telescopic cylinder, a tensioning force detection mechanism, a pressure supply system and a control module, wherein the tensioning force detection mechanism and the pressure supply system are electrically connected with the control module, the pressure supply system is provided with a first connecting port and a second connecting port, the first connecting port is communicated with a rodless cavity of the telescopic cylinder, the second connecting port is communicated with a rod cavity of the telescopic cylinder, the telescopic cylinder is arranged to be fixed, one end of the tensioning force detection mechanism is connected with the telescopic cylinder, and the other end of the tensioning force detection mechanism is arranged to be matched with a movable seat of the dryer, which is used for mounting a first chain wheel; the tension detection mechanism is used for detecting tension of the first chain wheel acting on the chain, and the control module is used for controlling the pressure supply system to drive the telescopic cylinder to stretch according to the tension and a preset instruction, so that the tension is adjusted to a preset value. The chain tensioning device not only occupies small space, but also does not need an independent equipment foundation.
Description
Technical Field
This paper relates to gypsum board production technical field, especially indicates a chain overspeed device tensioner and a desiccator of desiccator.
Background
The desiccator is the important equipment of production thistle board, and the operation of desiccator roll table adopts the chain to drive, and the quality and the output of gypsum board can be influenced to the good or bad of chain operation, and the tensioning of chain directly influences the chain operation again, so the tensioning of chain is more crucial.
The related chain tensioning is a weight type chain tensioning device, and comprises a sliding block, a steel wire rope, a pulley, a counterweight, an installation frame and the like. The chain tensioning device has the advantages that the mounting frame is particularly large in size, the weight of the balance weight is particularly large, and the space of a factory is particularly occupied; in addition, the mounting frame needs an independent equipment foundation, and the civil engineering cost is particularly high.
Disclosure of Invention
The application provides a chain overspeed device tensioner of desiccator, and not only occupation space is little, does not need independent equipment basis moreover.
The application also provides a dryer.
The chain tensioning device of the drying machine comprises a telescopic cylinder, a tensioning force detection mechanism, a pressure supply system and a control module, wherein the tensioning force detection mechanism and the pressure supply system are electrically connected with the control module, the pressure supply system is provided with a first connecting port and a second connecting port, the first connecting port is communicated with a rodless cavity of the telescopic cylinder, the second connecting port is communicated with a rod cavity of the telescopic cylinder, the telescopic cylinder is fixed, one end of the tensioning force detection mechanism is connected with the telescopic cylinder, and the other end of the tensioning force detection mechanism is matched with a movable seat of the drying machine, wherein the movable seat is used for installing a first chain wheel; the tension detection mechanism is used for detecting tension of the first chain wheel acting on the chain, and the control module is arranged for controlling the pressure supply system to drive the telescopic cylinder to stretch according to the tension and a preset instruction so as to adjust the tension to a preset value.
In an exemplary embodiment, the preset instruction includes: when F1 < F2, the control module controls the pressure supply system to supply a conducting medium from the second connecting port to the rod cavity to contract the telescopic cylinder; when F1 is larger than F2, the control module controls the pressure supply system to supply a conducting medium to the rodless cavity from the first connecting port to enable the telescopic cylinder to extend; when F1 is F2, the pressure of the rod cavity and the rodless cavity is kept balanced; f1 is the tension force, and F2 is the preset value.
In an exemplary embodiment, one end of the tension detecting mechanism is connected to the telescopic cylinder through a first rope, and the other end of the tension detecting mechanism is connected to the movable base through a second rope.
In an exemplary embodiment, one end of the tension detecting mechanism is connected to the telescopic cylinder through a first rope, the other end of the tension detecting mechanism is configured to pass through a second rope around a sheave rotatably mounted on the movable seat, and an end of the second rope, which is far away from the tension detecting mechanism, is configured to be fixed.
In an exemplary embodiment, the telescopic cylinder is a hydraulic cylinder, and the pressure supply system is a liquid supply system.
In an exemplary embodiment, the liquid supply system includes: the three-position four-way reversing valve is electrically connected with the control module, and the port A of the three-position four-way reversing valve is the first connecting port, and the port B of the three-position four-way reversing valve is the second connecting port; a liquid supply path, the outlet of which is communicated with the P port of the three-position four-way reversing valve; and the inlet of the liquid return path is communicated with the T port of the three-position four-way reversing valve.
In an exemplary embodiment, the liquid supply system further comprises: the port A and the port B are communicated with the rod cavity and the rodless cavity through the double hydraulic control one-way valve; and the throttling valve is arranged between the double hydraulic control one-way valve and the rod cavity or between the double hydraulic control one-way valve and the rodless cavity.
In an exemplary embodiment, the three-position, four-way reversing valve, the telescoping cylinder, and the tension detection mechanism comprise multiple sets.
In an exemplary embodiment, the liquid supply path includes a tank, a filter, a pump body, a pressure detection mechanism, an accumulator, and a relief valve.
The dryer provided by the embodiment of the invention comprises a rack, a movable seat, a first chain wheel, a second chain wheel, a chain and the chain tensioning device of the dryer provided by any one of the embodiments, wherein the movable seat is movably arranged on the rack, the first chain wheel is rotatably arranged on the movable seat, the second chain wheel is rotatably arranged on an output shaft of a motor, the chain is sleeved on the first chain wheel and the second chain wheel, and a telescopic cylinder is fixed on the rack.
In an exemplary embodiment, the dryer further includes: the grooved wheel is rotatably arranged on the movable seat, and one end of the second rope body, which is far away from the tension detection mechanism, is fixed on the rack.
The chain tensioning device of the drying machine provided by the embodiment of the invention comprises a telescopic cylinder, a tensioning force detection mechanism, a pressure supply system and a control module, wherein the tensioning force detection mechanism detects the tensioning force of a first chain wheel acting on a chain, and the control module controls the pressure supply system to drive the telescopic cylinder to stretch according to a preset instruction according to the tensioning force, so that the tensioning force is adjusted to a preset value, the chain can better run.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application. Other advantages of the present application may be realized and attained by the instrumentalities and combinations particularly pointed out in the specification and the drawings.
Drawings
The accompanying drawings are included to provide an understanding of the present disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the examples serve to explain the principles of the disclosure and not to limit the disclosure.
Fig. 1 is a partial schematic structural view of a dryer according to an embodiment of the present invention;
FIG. 2 is a schematic top view of the structure of FIG. 1;
FIG. 3 is a schematic view of the telescoping cylinder to chain arrangement of FIG. 1;
fig. 4 is a schematic structural diagram illustrating a connection between a pressure supply system, a plurality of telescopic cylinders, and a plurality of tension detection mechanisms in a dryer according to an embodiment of the present invention;
fig. 5 is a schematic structural view of the connection of the pressure supply system, a telescopic cylinder and a tension detecting mechanism in fig. 4.
Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 5 is:
100 telescopic cylinders, 200 tension force detection mechanisms, 300 pressure supply systems, 310 three-position four-way reversing valves, 320 liquid supply paths, 321 oil tanks, 3211 liquid level meters, 3212 liquid level relays, 3213 oil discharge ports, 322 filters, 323 pump bodies, 324 pressure detection mechanisms, 325 energy accumulators, 326 overflow valves, 327 one-way valves, 330 liquid return paths, 331 filters, 340 double-hydraulic control one-way valves, 350 throttle valves, 400 control modules, 500 first rope bodies, 600 second rope bodies, 710 racks, 720 movable seats, 730 first chain wheels, 740 chains and 750 grooved wheels.
Detailed Description
The present application describes embodiments, but the description is illustrative rather than limiting and it will be apparent to those of ordinary skill in the art that many more embodiments and implementations are possible within the scope of the embodiments described herein. Although many possible combinations of features are shown in the drawings and discussed in the detailed description, many other combinations of the disclosed features are possible. Any feature or element of any embodiment may be used in combination with or instead of any other feature or element in any other embodiment, unless expressly limited otherwise.
The present application includes and contemplates combinations of features and elements known to those of ordinary skill in the art. The embodiments, features and elements disclosed in this application may also be combined with any conventional features or elements to form a unique inventive concept as defined by the claims. Any feature or element of any embodiment may also be combined with features or elements from other inventive aspects to form yet another unique inventive aspect, as defined by the claims. Thus, it should be understood that any of the features shown and/or discussed in this application may be implemented alone or in any suitable combination. Accordingly, the embodiments are not limited except as by the appended claims and their equivalents. Furthermore, various modifications and changes may be made within the scope of the appended claims.
Further, in describing representative embodiments, the specification may have presented the method and/or process as a particular sequence of steps. However, to the extent that the method or process does not rely on the particular order of steps set forth herein, the method or process should not be limited to the particular sequence of steps described. Other orders of steps are possible as will be understood by those of ordinary skill in the art. Therefore, the particular order of the steps set forth in the specification should not be construed as limitations on the claims. Further, the claims directed to the method and/or process should not be limited to the performance of their steps in the order written, and one skilled in the art can readily appreciate that the sequences may be varied and still remain within the spirit and scope of the embodiments of the present application.
As shown in fig. 1 to 5, an embodiment of the present invention provides a chain tensioning device of a dryer, including a telescopic cylinder 100, a tensioning force detecting mechanism 200, a pressure supply system 300 and a control module 400, where the tensioning force detecting mechanism 200 and the pressure supply system 300 are both electrically connected to the control module 400, the pressure supply system 300 has a first connection port and a second connection port, the first connection port is communicated with a rodless cavity of the telescopic cylinder 100, the second connection port is communicated with a rod cavity of the telescopic cylinder 100, the telescopic cylinder 100 is configured to be fixed, one end of the tensioning force detecting mechanism 200 is connected to the telescopic cylinder 100, and the other end is configured to be matched with a movable seat 720 of the dryer, which is used for mounting a first sprocket; the tension detection mechanism 200 is configured to detect a tension of the first sprocket acting on the chain, and the control module 400 is configured to control the pressure supply system 300 to drive the telescopic cylinder 100 to stretch according to a preset instruction according to the tension so as to adjust the tension to a preset value.
This chain overspeed device tensioner, including telescoping cylinder 100, tensile force detection mechanism 200, supply to press system 300 and control module 400, tensile force detection mechanism 200 detects the tensile force that first sprocket acted on the chain, and control module 400 supplies according to the tensile force according to presetting order control pressure system 300 drive telescoping cylinder 100 and stretch out and draw back to adjust the tensile force to the default, realize that the chain operates better, this chain overspeed device tensioner not only simple structure, occupy empty less, do not need independent equipment basis moreover.
Illustratively, the preset instructions include: when F1 < F2, the control module 400 controls the pressure supply system 300 to supply the conducting medium to the rod cavity from the second connecting port to contract the telescopic cylinder 100, so as to increase F1; when F1 is greater than F2, the control module 400 controls the pressure supply system 300 to supply the conducting medium to the rodless cavity from the first connection port, so that the telescopic cylinder 100 is extended, and F1 is reduced; when F1 satisfies F2, the control module 400 stops the pressure supply system 300 to keep the telescopic cylinder 100 in the telescopic state; when F1 is F2, the pressure of the rodless cavity and the rod cavity of the telescopic cylinder are kept balanced; f1 is the tension force, and F2 is a preset value. The chain tensioning device adopts a closed-loop control mode, and the automation degree is higher.
As shown in fig. 1 to 3, one end of the tension detection mechanism 200 may be connected to the piston rod of the telescopic cylinder 100 through the first rope 500, and the other end may be connected to the movable seat 720 through the second rope 600; alternatively, one end of the tension detection mechanism 200 is connected to the piston rod of the telescopic cylinder 100 through the first rope 500, and the other end of the tension detection mechanism passes through the second rope 600 and bypasses the sheave 750 rotatably mounted on the movable seat 720, and then one end of the second rope 600 far away from the tension detection mechanism 200 is fixed (not shown in this embodiment); the above two modes can achieve the purpose of the present application, and the purpose of the present application does not depart from the design concept of the present invention, and therefore, the present application shall not be described herein again, and shall fall within the protection scope of the present application.
In an exemplary embodiment, as shown in fig. 1 to 5, the telescopic cylinder 100 is configured as a hydraulic cylinder, the pressure supply system 300 is configured as a liquid supply system, the tension detection mechanism 200 is a tension sensor, and the transmission medium is hydraulic oil.
Illustratively, as shown in fig. 4 and 5, the liquid supply system includes: the three-position four-way reversing valve 310 is electrically connected with the control module 400, wherein a port A is a first connecting port, and a port B is a second connecting port; a liquid supply path 320, the outlet of which is communicated with the P port of the three-position four-way reversing valve 310; and a return path 330, the inlet of which communicates with the T port of the three-position, four-way reversing valve 310.
Illustratively, as shown in fig. 4 and 5, the liquid supply system further includes: the port A and the port B are communicated with the rod cavity and the rodless cavity through the double hydraulic control one-way valve 340; and a throttle valve 350 disposed between the dual pilot operated check valve 340 and the rod chamber or between the dual pilot operated check valve 340 and the rodless chamber. And a hydraulic lock is formed by the double hydraulic control one-way valve 340, so that the pressure balance of the hydraulic cylinder is kept.
Illustratively, as shown in fig. 4, the three-position four-way reversing valve 310, the telescopic cylinder 100 and the tension detecting mechanism 200 comprise a plurality of sets, the liquid supply path 320 and the liquid return path 330 are a set, the liquid supply path 320 has a plurality of outlets and an inlet, the plurality of outlets of the liquid supply path 320 are in one-to-one correspondence with the plurality of P ports of the three-position four-way reversing valves 310, the liquid return path 330 has a plurality of inlets and an outlet, and the plurality of inlets of the liquid return path 330 are in one-to-one correspondence with the plurality of T ports of the three-position four-way reversing valves 310.
Illustratively, as shown in fig. 4 and 5, the three-position, four-way reversing valve 310 is a three-position, four-way solenoid reversing valve.
Exemplarily, as shown in fig. 4 and 5, the liquid supply path 320 includes an oil tank 321, a filter 322, a pump body 323, a pressure detection mechanism 324, an accumulator 325, an overflow valve 326, a check valve 327, and the like, which are connected by a pipeline, the oil tank 321 is provided with a liquid level meter 3211, a liquid level relay 3212, and an oil discharge port 3213, the liquid level meter 3211 and the liquid level relay 3212 are electrically connected to the control module 400, when the liquid level meter 3211 detects that the oil tank 321 is short of oil, the control device 400 controls the liquid level relay 3212 to open, and hydraulic oil is replenished into the oil tank 321 through the liquid level relay 3212; the liquid return path 330 is provided with a filter 331.
Illustratively, as shown in fig. 4 and 5, the pressure detecting mechanism 324 is a pressure gauge.
The embodiment of the present invention further provides a dryer, as shown in fig. 1 to 5, including a frame 710, a movable seat 720, a first chain wheel 730, a second chain wheel, a chain 740, and a chain 740 tensioning device of the dryer according to any one of the above embodiments, where the movable seat 720 is movably mounted on the frame 710, the first chain wheel 730 is rotatably mounted on the movable seat 720, the second chain wheel is rotatably mounted on an output shaft of a motor, the motor is fixed on the frame 710, the chain 740 is sleeved on the first chain wheel 730 and the second chain wheel, and the telescopic cylinder 100 is fixed on the frame 710.
The dryer has all the advantages of the chain 740 tensioning device of the dryer provided in any of the above embodiments, and the description thereof is omitted.
Illustratively, as shown in fig. 1 to 3, the dryer further includes: the sheave 750 is rotatably installed on the movable seat 720, one end of the tension detection mechanism 200 is connected to the piston rod of the telescopic cylinder 100 through the first rope 500, the other end of the tension detection mechanism bypasses the sheave 750 rotatably installed on the movable seat 720 through the second rope 600, and one end of the second rope 600 far away from the tension detection mechanism 200 is fixed on the frame 710.
The embodiment of the invention also provides a control method of the dryer, which comprises the following steps: the tension detection mechanism detects tension of the first chain wheel acting on the chain, and the pressure supply system is controlled to drive the telescopic cylinder to stretch based on the tension according to a preset instruction, so that the tension is adjusted to a preset value.
The preset instruction is as follows: when F1 < F2, the control module controls the pressure supply system to supply the conducting medium to the rod cavity from the second connecting port; when F1 is larger than F2, the control module controls the pressure supply system to supply the conducting medium to the rodless cavity from the first connecting port; when F1 is F2, the pressure balance of the rod cavity and the rodless cavity is kept; f1 is the tension force, and F2 is the preset value.
The chain tensioning device adopts a closed-loop control mode, and the automation degree is higher.
In summary, the chain tensioning device of the drying machine provided by the embodiment of the invention comprises the telescopic cylinder, the tensioning force detection mechanism, the pressure supply system and the control module, wherein the tensioning force detection mechanism detects the tensioning force of the first chain wheel acting on the chain, and the control module controls the pressure supply system to drive the telescopic cylinder to stretch according to the tensioning force according to the preset instruction, so that the tensioning force is adjusted to the preset value, the chain can better run, the chain tensioning device is simple in structure, occupies small space, and does not need an independent equipment base.
In the description of the present invention, it should be noted that the terms "upper", "lower", "one side", "the other side", "one end", "the other end", "side", "opposite", "four corners", "periphery", "mouth" structure ", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the structures referred to have specific orientations, are configured and operated in specific orientations, and thus, are not to be construed as limiting the present invention.
In the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "connected," "directly connected," "indirectly connected," "fixedly connected," "mounted," and "assembled" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; the terms "mounted," "connected," and "fixedly connected" may be directly connected or indirectly connected through intervening media, or may be connected through two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The chain tensioning device of the drying machine is characterized by comprising a telescopic cylinder, a tensioning force detection mechanism, a pressure supply system and a control module, wherein the tensioning force detection mechanism and the pressure supply system are electrically connected with the control module, the pressure supply system is provided with a first connecting port and a second connecting port, the first connecting port is communicated with a rodless cavity of the telescopic cylinder, the second connecting port is communicated with a rod cavity of the telescopic cylinder, the telescopic cylinder is fixed, one end of the tensioning force detection mechanism is connected with the telescopic cylinder, and the other end of the tensioning force detection mechanism is matched with a movable seat, used for mounting a first chain wheel, of the drying machine;
the tension detection mechanism is used for detecting tension of the first chain wheel acting on the chain, and the control module is arranged for controlling the pressure supply system to drive the telescopic cylinder to stretch according to the tension and a preset instruction so as to adjust the tension to a preset value.
2. The chain tensioner as set forth in claim 1, wherein the preset command comprises:
when F1 < F2, the control module controls the pressure supply system to supply a conducting medium from the second connecting port to the rod cavity to contract the telescopic cylinder;
when F1 is larger than F2, the control module controls the pressure supply system to supply a conducting medium to the rodless cavity from the first connecting port to enable the telescopic cylinder to extend;
when F1 is F2, the pressure of the rod cavity and the rodless cavity is kept balanced;
f1 is the tension force, and F2 is the preset value.
3. The chain tensioner according to claim 1 or 2, wherein one end of the tension detection mechanism is connected to the telescopic cylinder via a first rope, and the other end is configured to be connected to the movable seat via a second rope.
4. The chain tensioner according to claim 1 or 2, wherein the tension detecting mechanism has one end connected to the telescopic cylinder through a first rope and the other end arranged to pass around a sheave rotatably mounted on the movable seat through a second rope, and an end of the second rope remote from the tension detecting mechanism is arranged to be fixed.
5. A chain tensioner according to claim 1 or 2, wherein the telescopic cylinder is a hydraulic cylinder and the pressure supply system is a liquid supply system.
6. The chain tensioner as set forth in claim 5, wherein said liquid supply system comprises:
the three-position four-way reversing valve is electrically connected with the control module, and the port A of the three-position four-way reversing valve is the first connecting port, and the port B of the three-position four-way reversing valve is the second connecting port;
a liquid supply path, the outlet of which is communicated with the P port of the three-position four-way reversing valve;
and the inlet of the liquid return path is communicated with the T port of the three-position four-way reversing valve.
7. The chain tensioner as set forth in claim 6, wherein said liquid supply system further comprises:
the port A and the port B are communicated with the rod cavity and the rodless cavity through the double hydraulic control one-way valve; and the throttling valve is arranged between the double hydraulic control one-way valve and the rod cavity or between the double hydraulic control one-way valve and the rodless cavity.
8. The chain tensioner as set forth in claim 6, wherein said three-position, four-way reversing valve, said telescoping cylinder, and said tension detection mechanism comprise a plurality of sets.
9. A dryer comprising a frame, a movable seat movably mounted on the frame, a first sprocket rotatably mounted on the movable seat, a second sprocket rotatably mounted on an output shaft of a motor, a chain fitted over the first and second sprockets, and a chain tensioner of the dryer according to any one of claims 1 to 8, wherein the telescopic cylinder is fixed to the frame.
10. The dryer of claim 9, further comprising:
a sheave rotatably mounted on the movable seat, wherein the chain tensioner of the dryer is the chain tensioner of claim 4, and an end of the second rope remote from the tension detection mechanism is fixed to the frame.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111333196.2A CN114148688A (en) | 2021-11-11 | 2021-11-11 | Drying machine and chain tensioning device thereof |
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| CN202111333196.2A CN114148688A (en) | 2021-11-11 | 2021-11-11 | Drying machine and chain tensioning device thereof |
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| CN114148688A true CN114148688A (en) | 2022-03-08 |
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| CN202111333196.2A Pending CN114148688A (en) | 2021-11-11 | 2021-11-11 | Drying machine and chain tensioning device thereof |
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| CN111532683A (en) * | 2020-05-09 | 2020-08-14 | 徐州工程学院 | Automatic tension regulating and controlling system for hydraulic tensioning device of belt conveyor |
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