Conveyor Flexible Component Tensioning Device and Calcium Carbide Transportation Line

Abstract

The present invention relates to a tensioning device for a conveying flexible member and a calcium carbide transportation line. The tensioning device for the conveying flexible member includes a tensioning wheel around which the conveying flexible member bypasses, and further includes a guiding bracket. A counterweight bracket is assembled on the guiding bracket to be guided and moved in the vertical direction. The tensioning wheel is installed on the counterweight bracket. A stepped locking structure is provided between the counterweight bracket and the guiding bracket. The stepped locking structure includes a locking hole and a locking pin that are correspondingly inserted to lock and position the counterweight bracket on the guiding bracket. At least one of the locking hole and the locking pin is arranged with a plurality of intervals in the vertical direction. An elastic member is connected to the locking pin. The locking pin and the locking hole are in a blocking fit through an unlocking inclined surface and an unlocking blocking portion to position and fix the counterweight bracket, and the blocking fit can be released when the counterweight bracket has a downward trend. The above technical solution solves the technical problem in the prior art that the conveying flexible member floats when impacted, so that the tensioning device cannot effectively adjust the tension degree of the conveying flexible member.

Description

Technical Field

[0001] The present invention belongs to the technical field of calcium carbide production, and particularly relates to a tensioning device for a conveying flexible member and a calcium carbide transportation line. Background Art

[0002] The main component of calcium carbide is calcium carbide, which is the basic raw material of the organic synthetic chemical industry. Many organic compounds can be synthesized using calcium carbide as a raw material, and it is used in many industries such as industry, agriculture, and medicine. The acetylene gas generated by the reaction of calcium carbide with water can synthesize many organic compounds, such as synthetic rubber, artificial resin, acetone, ketene, carbon black, etc. Calcium carbide itself can be used as a desulfurizer in the steel industry, etc. The uses of calcium carbide are very extensive. In short, calcium carbide is a very important basic chemical raw material with countless uses.

[0003] In the prior art, calcium carbide produced from a calcium carbide furnace is usually loaded and unloaded by a calcium carbide transport vehicle. For example, a calcium carbide transport train disclosed in a Chinese invention patent with the authorization announcement number CN104986161B includes a plurality of calcium carbide transport trolleys, a closed-loop track, and a driving device. The closed-loop track forms a transport line track for transporting the calcium carbide trolleys, and the calcium carbide transport trolleys are movably assembled on the transport line track; the driving device includes a motor and a transport chain composed of a circular sprocket and a closed-loop circular chain. The transport chain extends along the transport line track and is arranged below the calcium carbide trolley to transport the calcium carbide trolley.

[0004] In order to improve the transport consistency of the transport chain, a corresponding tensioning structure is usually configured. For example, a chain connection structure disclosed in a Chinese invention patent application with the application publication number CN106246838A correspondingly arranges a tensioning sprocket on the chain. The tensioning sprocket is fixedly connected with a counterweight block for adjusting the position of the tensioning sprocket and the tension degree of the chain. However, when adjusting the tension degree of the chain, this chain connection structure completely relies on the counterweight block. When the chain is relaxed, the tensioning sprocket moves downward to tension the chain, and when the chain is slightly impacted, it will float slightly, easily causing the tensioning sprocket to follow the float, affecting the tension degree of the chain. Summary of the Invention

[0005] The purpose of the present invention is to provide a tensioning device for a conveying flexible member to solve the technical problem that the conveying flexible member in the prior art floats when impacted, making the tensioning device unable to effectively adjust the tension degree of the conveying flexible member; another purpose of the present invention is to provide a calcium carbide transportation line that can effectively adjust the tension degree of the conveying flexible member using the above-mentioned tensioning device for the conveying flexible member.

[0006] To achieve the above object, the technical solution of the conveying flexible member tensioning device provided by the present invention is: a conveying flexible member tensioning device, including a tensioning wheel around which the conveying flexible member passes. The conveying flexible member tensioning device further includes a guiding bracket, on which a counterweight frame that can be used as a counterweight alone or for arranging counterweight blocks is guidingly and movably assembled in the up and down direction. The tensioning wheel is installed on the counterweight frame. A stepped locking structure is provided between the counterweight frame and the guiding bracket. The stepped locking structure includes a lock hole and a lock pin that are correspondingly inserted to lock and position the counterweight frame on the guiding bracket. One of the guiding bracket and the counterweight frame is a lock pin frame with the lock pin movably assembled, and the other is a lock hole frame with the lock hole provided. At least one of the lock hole and the lock pin is arranged at intervals in the up and down direction in multiple numbers. An elastic member is connected to the lock pin to apply an elastic acting force to the lock pin to force the lock pin to insert into the corresponding lock hole. A downward unlocking pressing portion is provided on the lock pin, and a downward unlocking blocking portion is provided on the lock hole frame. At least one of the downward unlocking pressing portion and the downward unlocking blocking portion is an unlocking inclined surface. The downward unlocking pressing portion and the downward unlocking blocking portion are in pressing cooperation when the lock pin and the lock hole are inserted to form an unlocking pressing structure for the counterweight frame with a downward trend to drive the lock pin out of the corresponding lock hole.

[0007] Advantages of the conveying flexible member tensioning device: When the conveying flexible member provided by the present invention is worn for a long time and becomes loose and long, the counterweight frame and the tensioning wheel move downward under their own weights. Under the action of the downward unlocking inclined surface, the lock pin compresses the elastic member and exits from the lock hole, and moves downward with the unlocking of the counterweight frame and the tensioning wheel. When the lock pin moves to the next lock hole on the guiding bracket, under the elastic force of the elastic member, the lock pin re-enters the lock hole and is re-locked and matched with the lock hole, thereby effectively adjusting the tightness of the conveying flexible member. And when the conveying flexible member is slightly impacted, the lock pin and the lock hole are still in a locked and matched state, so that the tensioning wheel will not float, and therefore the tightness of the conveying flexible member is not affected.

[0008] Further, the guiding bracket includes two guide rails extending in the up and down direction that are relatively spaced apart in the left and right direction. A plurality of the lock holes are respectively provided on the two guide rails in the up and down direction. The lock pins are guidingly and movably assembled on the counterweight frame corresponding to each guide rail in the left and right direction.

[0009] Advantages: Setting the lock holes in the up and down direction on the guide rails is convenient for processing. Corresponding lock pins are provided on the counterweight frame, which is convenient for arrangement on the one hand. On the other hand, the number of lock pins does not need to be set a lot, and the overall cost is low.

[0010] Further, at least one pair of lock pins is provided on the counterweight frame. The pair of lock pins includes two lock pins arranged corresponding to the two guide rails one by one. A synchronous linkage mechanism is provided between the two lock pins of the same pair of lock pins to enable the two lock pins to be synchronously locked and synchronously unlocked.

[0011] Beneficial effects: The locking pin pair and the synchronous linkage mechanism therebetween can achieve synchronous locking and unlocking of the locking pin, so that the counterweight frame and the tensioning wheel have good downward movement stability when the conveying flexible member is relaxed and moves downward.

[0012] Furthermore, the synchronous linkage mechanism includes an intermediate rod hinged on the counterweight frame, and the intermediate rod is respectively connected to the corresponding locking pins through a transmission connecting rod to drive the two locking pins belonging to the same locking pin pair to move synchronously during the swinging process of the intermediate rod.

[0013] Beneficial effects: The connecting rod type synchronous linkage mechanism is simple in structure and convenient in design and installation.

[0014] Furthermore, the elastic member is a compression spring, and the compression spring is correspondingly sleeved on a transmission connecting rod that is transmission-connected to the corresponding locking pin.

[0015] Beneficial effect: As a common elastic part, the compression spring is easy to assemble.

[0016] Furthermore, the locking pin is provided with the unlocking inclined surface, the unlocking inclined surface is arranged downward, and the bottom end of the unlocking inclined surface is a rounded structure.

[0017] Beneficial effect: The bottom end of the unlocking slope has a rounded structure, which is beneficial to reducing the friction between the bottom end of the unlocking slope and the downward unlocking stop, thereby facilitating the guidance of the lock pin to withdraw from the lock hole and preventing the lock pin from being stuck in the lock hole and unable to withdraw.

[0018] Furthermore, the central axis of the tensioning wheel extends in the front-to-back direction, and the guide rails are correspondingly arranged on the left and right sides of the tensioning wheel.

[0019] Beneficial effect: The central axis of the tensioning wheel extends in the front-to-back direction, that is, the tensioning wheel is set in the vertical direction, and the guide rails are arranged on the left and right sides of the tensioning wheel, that is, the guide rails are also set in the vertical direction. The tensioning wheel can be guided and moved along the extension direction of the guide rails by relying on its own weight, and then when the conveying flexible member is relaxed, the tensioning wheel moves down along the guide rails to adjust the tightness of the conveying flexible member.

[0020] The technical solution of the calcium carbide conveying line provided by the present invention is as follows: A calcium carbide transportation line includes a conveying track, on which a calcium carbide conveying train and a conveying flexible member for driving the calcium carbide conveying train to reciprocate are provided. The calcium carbide transportation line further includes a tensioning device for tensioning the flexible member. The tensioning device includes a tensioning wheel around which the conveying flexible member passes. The tensioning device also includes a guiding bracket, on which a counterweight frame that can be used as a counterweight alone or for arranging counterweight blocks is guidingly movably assembled in the vertical direction. The tensioning wheel is installed on the counterweight frame. A stepped locking structure is provided between the counterweight frame and the guiding bracket. The stepped locking structure includes a locking hole and a locking pin that are correspondingly inserted to lock and position the counterweight frame on the guiding bracket. One of the guiding bracket and the counterweight frame is a locking pin frame with the locking pin movably assembled, and the other is a locking hole frame with the locking hole provided. At least one of the locking hole and the locking pin is arranged at intervals in the vertical direction. An elastic member is connected to the locking pin to apply an elastic acting force to the locking pin to force the locking pin to insert into the corresponding locking hole. A downward unlocking pressing portion is provided on the locking pin, and a downward unlocking blocking portion is provided on the locking hole frame. At least one of the downward unlocking pressing portion and the downward unlocking blocking portion is an unlocking inclined surface. The downward unlocking pressing portion and the downward unlocking blocking portion are in pressing cooperation when the locking pin and the locking hole are inserted to form an unlocking pressing structure for the counterweight frame with a downward trend to drive the locking pin out of the corresponding locking hole.

[0021] Advantages of the calcium carbide conveying line: When the conveying flexible member provided by the present invention is worn for a long time and becomes loose and elongated, the counterweight frame and the tensioning wheel move downward under their own weights. Under the action of the downward unlocking inclined surface, the locking pin compresses the elastic member and exits from the locking hole, and moves downward as the counterweight frame and the tensioning wheel are unlocked. When the locking pin moves to the next locking hole on the guiding bracket, under the elastic force of the elastic member, the locking pin re-enters the locking hole and is re-locked and matched with the locking hole, so as to effectively adjust the tightness of the conveying flexible member. And when the conveying flexible member is slightly impacted, since the locking pin and the locking hole are still in the locked and matched state, the tensioning wheel will not float, that is, the tightness of the conveying flexible member is not affected, and the calcium carbide conveying train runs more stably on the conveying track.

[0022] Further, the guiding bracket includes two guide rails extending in the vertical direction and arranged at intervals relative to each other in the left-right direction. A plurality of the locking holes are respectively provided on the two guide rails in the vertical direction. The locking pins are respectively guidingly movably assembled on the counterweight frame corresponding to the guide rails in the left-right direction.

[0023] Advantages: Setting the locking holes in the vertical direction on the guide rails is convenient for processing. Corresponding locking pins are provided on the counterweight frame. On the one hand, it is convenient for arrangement. On the other hand, the number of locking pins does not need to be set a lot, and the overall cost is low.

[0024] Furthermore, at least one locking pin pair is provided on the counterweight frame, and the locking pin pair includes two locking pins arranged in a one-to-one correspondence with the two guide rails, and a synchronous linkage mechanism is provided between the two locking pins of the same locking pin pair so that the two locking pins are locked and unlocked synchronously.

[0025] Beneficial effects: The locking pin pair and the synchronous linkage mechanism therebetween can achieve synchronous locking and unlocking of the locking pin, so that the counterweight frame and the tensioning wheel have good downward movement stability when the conveying flexible member is relaxed and moves downward.

[0026] Furthermore, the synchronous linkage mechanism includes an intermediate rod hinged on the counterweight frame, and the intermediate rod is respectively connected to the corresponding locking pins through a transmission connecting rod to drive the two locking pins belonging to the same locking pin pair to move synchronously during the swinging process of the intermediate rod.

[0027] Beneficial effects: The connecting rod type synchronous linkage mechanism is simple in structure and convenient in design and installation.

[0028] Furthermore, the elastic member is a compression spring, and the compression spring is correspondingly sleeved on a transmission connecting rod that is transmission-connected to the corresponding locking pin.

[0029] Beneficial effect: As a common elastic part, the compression spring is easy to assemble.

[0030] Furthermore, the locking pin is provided with the unlocking inclined surface, the unlocking inclined surface is arranged downward, and the bottom end of the unlocking inclined surface is a rounded structure.

[0031] Beneficial effect: The bottom end of the unlocking slope has a rounded structure, which is beneficial to reduce the friction between the bottom end of the unlocking slope and the downward unlocking stop, thereby facilitating the guiding of the lock pin to unlock from the lock hole and preventing the lock pin from being stuck in the lock hole and unable to withdraw.

[0032] Furthermore, the central axis of the tensioning wheel extends in the front-to-back direction, and the guide rails are correspondingly arranged on the left and right sides of the tensioning wheel.

[0033] Beneficial effect: The central axis of the tensioning wheel extends in the front-to-back direction, that is, the tensioning wheel is set in the vertical direction, and the guide rails are arranged on the left and right sides of the tensioning wheel, that is, the guide rails are also set in the vertical direction. The tensioning wheel can be guided and moved along the extension direction of the guide rails by relying on its own weight, and then when the conveying flexible member is relaxed, the tensioning wheel moves down along the guide rails to adjust the tightness of the conveying flexible member.

[0034] Furthermore, the calcium carbide transport line also includes a flexible member driving device for driving the movement of the conveying flexible member, two upper reversing guide wheels are provided on the top of the guide bracket of the tensioning device, and the tensioning wheel is located between and below the two upper reversing guide wheels, and a lower reversing guide wheel is provided below each upper reversing guide wheel on the conveying track.

[0035] Beneficial effects: The tensioning wheel is arranged between two upper reversing guide wheels and below them, which can reduce the volume of the tensioning device in the front-back direction. And a lower reversing guide wheel is correspondingly arranged below the conveying track, which can enable the whole tensioning device to be located above the flexible member driving device, thus facilitating manual adjustment, maintenance and repair of the tensioning device. Description of the Drawings

[0036] Figure 1 It is a schematic structural diagram of the conveying flexible member tensioning device provided by the present invention;

[0037] Figure 2 It is a schematic diagram of the state of the conveying flexible member tensioning device provided by the present invention when unlocked;

[0038] Figure 3 It is Figure 1 a partial structural diagram of the counterweight frame with a lock pin pair and a synchronous linkage mechanism in

[0039] Figure 4 It is Figure 3 an enlarged view of part A in

[0040] Figure 5 It is a top view of the overall structure of the calcium carbide conveying line provided by the present invention;

[0041] Figure 6 It is a front view of the overall structure of the calcium carbide conveying line provided by the present invention;

[0042] Figure 7 It is a partial schematic diagram of the calcium carbide conveying line provided by the present invention ( Figure 5 structural schematic diagram of part B in

[0043] Description of the reference numerals: 1 - conveying chain, 2 - tensioning wheel, 3 - counterweight frame, 4 - guiding bracket, 5 - lock hole, 6 - lock pin, 7 - compression spring, 8 - intermediate rod, 9 - transmission rod, 10 - guide rail, 11 - rounded section, 12 - downward unlocking stop portion, 13 - downward unlocking pressing portion, 14 - driving device, 15 - upper reversing guide wheel, 16 - lower reversing guide wheel, 17 - conveying track, 18 - calcium carbide conveying train, 19 - calcium carbide furnace, 20 - tapping hole. Detailed Embodiments

[0044] The following further describes the embodiments of the present invention with reference to the drawings.

[0045] Specific embodiments of the conveying flexible member tensioning device provided by the present invention;

[0046] This conveying flexible member tensioning device is specifically applied in the process of calcium carbide handling, such as Figures 1 to 4As shown in the figure, it includes a guiding bracket 4 and a counterweight frame 3 that is guided and movably assembled on the guiding bracket 4 in the up and down direction. The guiding bracket 4 includes a vertical part and a horizontal part perpendicular to the vertical part, presenting a T shape as a whole. The vertical part of the guiding bracket 4 includes two guide rails 10, both of which are made of channel steel, arranged relatively spaced apart in the left and right direction and extending in the up and down direction; the horizontal part of the guiding bracket 4 is arranged at the top of the two guide rails 10 and is perpendicular to the two guide rails 10, and two upper reversing guide wheels 15 are provided at the top of the horizontal part.

[0047] A tensioning wheel 2 is configured on the counterweight frame 3, and the central axis of the tensioning wheel 2 extends in the front and back direction. In order to reduce the volume of the entire conveying flexible member tensioning device in the front and back direction, the tensioning wheel 2 is arranged between the two upper reversing guide wheels 15 and is located below the two upper reversing guide wheels 15. At this time, the two guide rails 10 are respectively arranged on the left and right sides of the tensioning wheel 2. The conveying flexible member bypasses the two upper reversing guide wheels 15 and the tensioning wheel 2. In this embodiment, the conveying flexible member adopts a conveying chain 1 with better conveying stability.

[0048] A stepped locking structure is provided between the counterweight frame 3 and the two guide rails 10. The stepped locking structure includes a lock hole 5 and a lock pin 6 that are correspondingly inserted to lock and position the counterweight frame 3 on the guiding bracket 4. For the convenience of installation and cost saving, lock holes 5 are provided on the guide rails 10, and a plurality of lock holes 5 are arranged at intervals in the extending direction of the two guide rails 10; on the counterweight frame 3, lock pins 6 are respectively guided and movably assembled along the left and right direction corresponding to each guide rail 10. At this time, the entire counterweight frame 3 forms a lock pin frame for movably assembling the lock pins 6, and the entire guiding bracket 4 forms a lock hole frame provided with lock holes 5.

[0049] As Figure 3 shown, one end of the lock pin 6 away from the lock hole 5 is connected with an elastic member that applies an elastic force to the lock pin 6 to force the lock pin 6 to insert into the corresponding lock hole 5. Specifically, the elastic member adopts a compression spring 7. Two lock pins 6 arranged along the left and right direction on the counterweight frame 3 form a lock pin pair. The two lock pins in this lock pin pair are arranged corresponding to the two guide rails 10, and a synchronous linkage mechanism is provided between the two lock pins 6. The synchronous linkage mechanism can realize the synchronous locking and synchronous unlocking of the two lock pins 6. The synchronous linkage mechanism includes an intermediate rod 8 hinged on the counterweight frame 3. Two transmission rods 9 for driving the movement of the lock pins 6 are respectively hinged at both ends of the intermediate rod 8. The transmission rod 9 includes a transmission connecting rod hinged with the intermediate rod 8 and a straight rod hinged with the transmission connecting rod. The external of the straight rod is sleeved with the above-mentioned compression spring 7, and the straight rod penetrates into the lock pin 6. A downward unlocking pressing part 13 is provided on the lock pin 6, and a downward unlocking blocking part 12 is provided on the lock hole. In this embodiment, the downward unlocking pressing part 13 is an unlocking inclined surface, and its structure is as Figure 4As shown, the unlocking inclined surface is arranged downward, and the bottom end of the unlocking inclined surface is a rounded corner section 11. The rounded corner section 11 can reduce the friction between the unlocking inclined surface and the downward unlocking stop portion 12, preventing the locking pin 6 from getting stuck in the lock hole 5 and unable to make the counterweight frame 3 move downward under its own weight; the edge of the lock hole 5 forms the downward unlocking stop portion 12. The downward unlocking pressing portion 13 and the downward unlocking stop portion 12 are in pressing cooperation when the locking pin 6 is inserted into the lock hole 5 to form an unlocking pressing structure for the counterweight frame 3 with a downward trend to drive the locking pin 6 out of the corresponding lock hole 5.

[0050] In the initial position, the conveying endless chain 1 is not worn and is in a tensioned state. The locking pin 6 is inserted into the lock hole 5 and is in locking cooperation with the lock hole 5. The compression spring 7 is in a compressed state, and the linear rod in the transmission rod 9 is in an extended state.

[0051] When the conveying endless chain 1 is worn after being used for a long time and then becomes loose and elongated, as Figure 2 shown, the counterweight frame 3 drives the locking pin 6 out of the corresponding lock hole 5 under its own gravity. Since the bottom end of the unlocking inclined surface of the locking pin 6 is the rounded corner section 11, it is convenient for the locking pin 6 to exit from the lock hole 5; when exiting, the compression spring 7 is compressed, the linear rod in the transmission rod 9 is in a retracted state, and the counterweight frame 3 moves downward along the guide rail 10.

[0052] When the tensioning wheel 2 and the counterweight frame 3 descend to the next-level lock hole 5, the compression spring 7 resets, the linear rod of the transmission rod 9 extends, and under the elastic force of the compression spring 7, the locking pin 6 is pushed into the lock hole 5 and is in locking cooperation with the lock hole 5, so that the counterweight frame 3 is re-locked and positioned on the guiding bracket 4, that is, the conveying endless chain 1 is in a tensioned state again. When the tensioned conveying endless chain 1 is impacted, since the locking pin 6 and the lock hole 5 are still in locking cooperation, the counterweight frame 3 will not move upward, and the stability is very good.

[0053] In the above embodiment, the conveying flexible member uses a conveying endless chain. In other embodiments, the conveying flexible member can also use a conveyor belt or a conveying wire rope.

[0054] In the above embodiment, the locking pin in the stepped locking structure is arranged on the counterweight frame, and the lock hole is arranged on the guiding bracket. In other embodiments, the lock hole can also be arranged on the counterweight frame, and the locking pin is arranged on the guiding bracket; in the above embodiment, the guiding bracket is provided with a plurality of lock holes in the up-down direction, and only one pair of locking pins is arranged on the counterweight frame. In other embodiments, a plurality of locking pins can also be arranged on the guiding bracket, and a pair of lock holes can be arranged on the counterweight frame, or locking pins can be arranged on the counterweight frame in the front-rear direction, and no lock holes are arranged on the guide rail, that is, a separate guiding is matched with a separate locking. The separate guiding is realized by the counterweight frame moving downward along the guide rail, and the separate locking is realized by the locking pins arranged on the counterweight frame in the front-rear direction being in locking cooperation with the installation structure of the tensioning device in the front-rear direction of the counterweight frame.

[0055] In the above embodiments, the counterweight frame is used as a counterweight alone. In other embodiments, counterweight blocks may also be arranged on the counterweight frame.

[0056] In the above embodiments, a synchronous linkage mechanism is arranged between a pair of locking pins on the counterweight frame to ensure synchronous performance. In other embodiments, the two locking pins in the pair of locking pins may also be separately controlled by a transmission mechanism.

[0057] In the above embodiments, the elastic member is a compression spring. In other embodiments, the elastic member may also be an ordinary spring, a tension spring, a torsion spring, etc.

[0058] Specific embodiments of the calcium carbide conveying line provided by the present invention, such as Figure 5 , Figure 6 and Figure 7 As shown, the calcium carbide conveying line in this embodiment includes a conveying track 17 and a calcium carbide conveying train 18 movably assembled on the conveying track 17. The calcium carbide conveying train 18 includes a plurality of calcium carbide conveying trolleys connected end to end. The conveying track 17 is arranged in a closed loop. A conveying flexible member extending along the conveying track 17 and fixedly connected to the calcium carbide conveying trolley is arranged on the conveying track 17. The calcium carbide conveying trolley is located above the conveying flexible member. In this embodiment, the conveying flexible member is a conveying chain 1, and the conveying chain 1 is used to drive the calcium carbide conveying train 18 to move back and forth. It should be noted that the reciprocating movement of the calcium carbide conveying train refers to the return movement along the original path, rather than the repeated movement around a circle.

[0059] An electric calcium carbide furnace 19 for reacting to produce calcium carbide is arranged inside the circular track formed by the conveying track 17. The electric calcium carbide furnace 19 is provided with a tapping port 20 for discharging molten calcium carbide above the conveying track 17. A discharging point for discharging when the calcium carbide conveying trolley moves to this position is arranged on the conveying track 17 at a position far from the electric calcium carbide furnace 19. There are two discharging points in total. A driving device 14 for driving the conveying chain 1 to move is arranged between the two discharging points. Specifically, the driving device 14 includes a driving motor, and a driving sprocket fixedly connected to the conveying chain 1 to drive the conveying chain to move is assembled on the output shaft of the driving motor. A group of calcium carbide conveying trains 18 are respectively arranged between the two discharging points and the electric calcium carbide furnace. One of the two groups of calcium carbide conveying trains can be used as a standby group to ensure the conveying of calcium carbide when the other group breaks down and needs to be repaired.

[0060] The calcium carbide conveying line further includes a tensioning device for tensioning the above-mentioned conveying chain. The structure of the tensioning device is the same as that of the conveying flexible member tensioning device in the above embodiments, and will not be described in detail here. The specific structure inside the conveying flexible member tensioning device in the above embodiments is directly cited below. Lower reversing guide wheels 16 are respectively arranged below each of the above-mentioned upper reversing guide wheels 15 on the conveying track 17, so that the driving device 14 is located above the tensioning device as a whole.

[0061] During the operation of the calcium carbide conveying line, the calcium carbide conveying trolley receives molten calcium carbide from the tapping opening of the calcium carbide furnace 19. The driving motor starts and drives the conveying endless chain 1 through the driving sprocket, and the conveying endless chain 1 drives the calcium carbide conveying trolley fixedly connected thereto to move on the conveying track 17. The calcium carbide conveying trolley is located above the conveying endless chain 1. When the conveying endless chain 1 is worn for a long time and becomes loose, the counterweight frame 3 in the tensioning device moves downward along the guide rail 10 under the action of its own weight. Under the action of the unlocking inclined plane on the locking pin 6, the locking pin 6 withdraws from the locking hole 5 to achieve unlocking until it descends to the next-level locking hole 5 to re-form a locking fit, and the tensioning of the conveying endless chain 1 is realized again, ensuring the stable operation of the calcium carbide conveying train 18.

Claims

1. A conveying flexible member tensioning device, comprising a tensioning wheel for the conveying flexible member to pass around, Features: The conveying flexible member tensioning device also includes a guide bracket, on which a counterweight frame that can be used as a counterweight alone or for arranging a counterweight block is installed for guiding and moving in the up-down direction, and a tensioning wheel is installed on the counterweight frame, and a step locking structure is provided between the counterweight frame and the guide bracket, and the step locking structure includes a lock hole and a lock pin that are correspondingly inserted to lock and position the counterweight frame on the guide bracket, the counterweight frame is a lock pin frame that is movably equipped with the lock pin, and the guide bracket is a lock hole frame provided with the lock hole, and a plurality of lock holes are arranged at intervals in the up-down direction, and a device is connected to the lock pin to apply an elastic force to the lock pin to force the lock pin to be inserted An elastic part in the corresponding lock hole, a downward unlocking pressing part is provided on the lock pin, and a downward unlocking stopping part formed along the lock hole is provided on the lock hole frame, the downward unlocking pressing part is an unlocking inclined surface, the unlocking inclined surface is arranged downward and the bottom end of the unlocking inclined surface is a rounded section, and the downward unlocking pressing part and the downward unlocking stopping part are pressed together when the lock pin and the lock hole are plugged in to form an unlocking pressing structure so that the counterweight frame with a downward trend can drive the lock pin to exit the corresponding lock hole; at least one lock pin pair is provided on the counterweight frame, and the two lock pins of each lock pin pair are arranged along the left and right directions of the counterweight frame, and a synchronous linkage mechanism is provided between the two lock pins.

2. The conveying flexible member tensioning device according to claim 1, Features: The guide bracket includes two guide rails that are arranged relatively spaced apart in the left-right direction and extend in the up-down direction. The two guide rails are respectively provided with a plurality of lock holes in the up-down direction. The counterweight frame is provided with lock pins corresponding to each guide rail for guiding movement in the left-right direction.

3. The conveying flexible member tensioning device according to claim 2, Features: The lock pin pair comprises two lock pins arranged in one-to-one correspondence with the two guide rails, and a synchronous linkage mechanism is provided between the two lock pins of the same lock pin pair to enable the two lock pins to be locked and unlocked synchronously.

4. The conveying flexible member tensioning device according to claim 3, Features: The synchronous linkage mechanism includes an intermediate rod hinged on the counterweight frame, and the intermediate rod is respectively connected to the corresponding locking pins through a transmission connecting rod, so as to drive the two locking pins belonging to the same locking pin pair to move synchronously during the swinging process of the intermediate rod.

5. The conveying flexible member tensioning device according to claim 4, Features: The elastic member is a compression spring, which is correspondingly sleeved on a transmission connecting rod that is transmission-connected to a corresponding locking pin.

6. The conveying flexible member tensioning device according to any one of claims 1 to 5, Features: The locking pin is provided with the unlocking inclined surface, which is arranged downward, and the bottom end of the unlocking inclined surface is a rounded structure.

7. The conveying flexible member tensioning device according to any one of claims 2 to 5, Features: The central axis of the tension wheel extends along the front-rear direction, and the guide rails are arranged on the left and right sides of the tension wheel accordingly.

8. A calcium carbide transport line, comprising a transport track, on which a calcium carbide transport train and a transport flexible member for driving the calcium carbide transport train to move back and forth are arranged, the calcium carbide transport line also comprising a tensioning device for tensioning the flexible member, the tensioning device comprising a tensioning wheel for the transport flexible member to pass around, Features: The tensioning device also includes a guide bracket, on which a counterweight frame that can be used as a counterweight alone or for arranging a counterweight block is installed for guiding and moving in the up-down direction, a tensioning wheel is installed on the counterweight frame, a step locking structure is provided between the counterweight frame and the guide bracket, the step locking structure includes a lock hole and a lock pin that are correspondingly inserted to lock and position the counterweight frame on the guide bracket, the counterweight frame is a lock pin frame that is movably equipped with the lock pin, the guide bracket is a lock hole frame that is provided with the lock hole, a plurality of lock holes are arranged at intervals in the up-down direction, and a device is connected to the lock pin to apply an elastic force to the lock pin to force the lock pin to be inserted into the corresponding The elastic part in the lock hole, the lock pin is provided with a downward unlocking pressing part, the lock hole frame is provided with a downward unlocking stopping part formed along the lock hole, the downward unlocking pressing part is an unlocking inclined surface, the unlocking inclined surface is arranged downward and the bottom end of the unlocking inclined surface is a rounded section, the downward unlocking pressing part and the downward unlocking stopping part are pressed together when the lock pin and the lock hole are plugged in to form an unlocking pressing structure so that the counterweight frame with a downward trend can drive the lock pin to withdraw from the corresponding lock hole; at least one lock pin pair is provided on the counterweight frame, and the two lock pins of each lock pin pair are arranged along the left and right directions of the counterweight frame, and a synchronous linkage mechanism is provided between the two lock pins.

9. The calcium carbide transportation line according to claim 8, Features: The guide bracket includes two guide rails that are arranged relatively spaced apart in the left-right direction and extend in the up-down direction. The two guide rails are respectively provided with a plurality of lock holes in the up-down direction. The counterweight frame is provided with lock pins corresponding to each guide rail for guiding movement in the left-right direction.

10. The calcium carbide transportation line according to claim 9, Features: The lock pin pair comprises two lock pins arranged in one-to-one correspondence with the two guide rails, and a synchronous linkage mechanism is provided between the two lock pins of the same lock pin pair to enable the two lock pins to be locked and unlocked synchronously.

11. The calcium carbide transportation line according to claim 10, Features: The synchronous linkage mechanism includes an intermediate rod hinged on the counterweight frame, and the intermediate rod is respectively connected to the corresponding locking pins through a transmission connecting rod, so as to drive the two locking pins belonging to the same locking pin pair to move synchronously during the swinging process of the intermediate rod.

12. The calcium carbide transportation line according to claim 11, Features: The elastic member is a compression spring, which is correspondingly sleeved on a transmission connecting rod that is transmission-connected to a corresponding locking pin.

13. The calcium carbide transportation line according to any one of claims 8 to 12, Features: The locking pin is provided with the unlocking inclined surface, which is arranged downward, and the bottom end of the unlocking inclined surface is a rounded structure.

14. The calcium carbide transportation line according to any one of claims 9 to 12, Features: The central axis of the tension wheel extends along the front-rear direction, and the guide rails are arranged on the left and right sides of the tension wheel accordingly.

15. The calcium carbide transportation line according to any one of claims 8 to 12, Features: The calcium carbide transportation line further includes a flexible member driving device for driving the movement of the conveying flexible member. Two upper reversing guide wheels are provided at the top of the guiding bracket of the tensioning device. The tensioning wheel is located between the two upper reversing guide wheels and below them. A lower reversing guide wheel is respectively provided below each upper reversing guide wheel on the conveying track.

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