Chain clamping device for chain tightening of scraper

Abstract

The utility model relates to the technical field of coal mine conveying equipment, in particular to a chain clamping device for chain tightening of a scraper, which comprises a chain stopper, a fixing seat, a hydraulic jack and a chain clamping component. The chain clamping assembly is arranged on one side of the chain stopper and limits the other pair of chain rings in the vertical state, the fixing base is located on the side, away from the chain stopper, of the chain clamping assembly, a piston rod of the hydraulic jack is obliquely arranged downwards, and the cylinder end of the hydraulic jack is hinged to the fixing base through a pin shaft. A piston rod of the hydraulic jack is hinged to the clamping chain assembly. The end of the piston rod and the vertical ring are connected into a whole through the chain clamping assembly, the limiting pin shaft penetrates through the middle of the chain vertical ring, it is guaranteed that slipping is avoided, and compared with the mode that a piston rod abuts against a scraper blade to directly tighten a chain in the prior art, personnel and equipment are safer.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mine conveying equipment, and more specifically to a chain clamping device for tightening a chain of a scraper. Background Art

[0002] The scraper is an important conveying equipment in the coal mine. Whether the chain tightness is appropriate directly affects the stability and life of the whole machine. Before the scraper is installed and put into operation, the chain must be tightened to ensure a reasonable tension of the chain. After running for a period of time, the chain will produce plastic deformation under the action of traction, causing the chain pitch to lengthen. In the early stage of chain elongation, the telescopic tail of the scraper or the telescopic head of the transfer machine can be used for compensation. When the elongation of the telescopic cylinder reaches the maximum stroke and cannot be compensated again, the chain will become loose and piled up, resulting in a series of faults such as tooth jumping, top gnawing, and chain breaking, which will lead to production suspension and even endanger the safety of operators. At this time, the loose chain needs to be tensioned and the excess chain links removed.

[0003] At present, a device that uses a push jack in conjunction with a chain blocker to tighten the chain is usually installed at a position farther than the maximum length of the push jack piston rod. It uses a limit pin and the scraper machine tank to limit the position and fix the scraper at that location. Then one end of the base of the push jack is fixed to the baffle or cover plate of the scraper conveying equipment through a pin shaft, and one end of the piston rod directly contacts the side of the scraper. After the high-pressure emulsion is connected through the hydraulic valve, the piston rod is driven to extend, pushing the scraper at that location forward, and the chain between the scraper contacted by the piston rod and the scraper limited by the chain blocker is relaxed, and the remaining closed-loop chains are tightened. After reaching a reasonable tension, the emulsion is cut off and the piston rod is kept stationary through a one-way lock, and then the excess chain is cut off, and the two ends of the chain are connected using a chain ring to complete the chain tightening work.

[0004] Since one end of the device is fixed and the other end relies only on the piston head to resist the side of the scraper, and the jack thrust can reach about 10 tons, and the underground working conditions are dark and humid, if the contact between the piston head and the scraper is unstable and easy to slip, causing the scraper chain to reverse, it will cause a major safety hazard to the operator.

[0005] Therefore, it is necessary to improve the prior art. Utility Model Content

[0006] In order to overcome the deficiencies in the prior art, a chain clamping device for tightening the chain of a scraper conveyor which is easy to use and highly safe is provided.

[0007] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0008] A chain clamping device for tightening the chain of a scraper, comprising a chain blocker, a fixing seat, a hydraulic jack and a chain clamping assembly, wherein the chain blocker is fixedly arranged in a scraper tank body and limits a pair of chain links;

[0009] The chain assembly is arranged on one side of the chain stopper and limits the other pair of chain links in an upright state. The fixing seat is located on the side of the chain assembly away from the chain stopper. The piston rod of the hydraulic jack is arranged to be inclined downward. The cylinder end of the hydraulic jack is hinged to the fixing seat through a pin shaft, and the piston rod of the hydraulic jack is hinged to the chain assembly.

[0010] Preferably, the chain assembly includes a guide plate, a limit plate and a reinforcement plate. The limit plate is fixedly arranged in the middle of the upper end of the guide plate and is perpendicular to the guide plate. Limiting slots with lower end openings are symmetrically arranged on both sides of the front side of the limit plate. A hinge seat is arranged between the front side of the limit plate and the upper end surface of the guide plate. A reinforcement plate is arranged between the back side of the limit plate and the upper end surface of the guide plate.

[0011] Preferably, both the left and right side surfaces of the limiting plate are provided with limiting holes, and limiting pins are inserted into the limiting holes, and the limiting pins pass through the limiting slots on the corresponding side.

[0012] Preferably, one end of the limit pin is fixedly connected to a positioning plate, the limit pin is vertically arranged at the lower side of the positioning plate, and a positioning hole is arranged at the upper side of the positioning plate;

[0013] The left and right sides of the limit plate are fixedly provided with guide shafts, the positioning hole of the positioning plate is sleeved on the guide shaft on the corresponding side, and the outer end of the guide shaft is provided with a limit hole and a limit pin is inserted.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. The utility model connects the end of the piston rod with the vertical ring through the chain clamp assembly, and the limit pin runs through the middle of the chain vertical ring to ensure that it will not slip. Compared with the previous method of using the piston rod to contact the scraper to tighten the chain directly, it is safer for personnel and equipment;

[0016] 2. The utility model chain assembly decomposes the downward force of the hydraulic jack into horizontal thrust and positive pressure. The horizontal thrust of the opposing ring is used to tighten the chain, and the positive pressure on the assembly ensures that the piston rod does not rebound upward, greatly improving the safety performance;

[0017] 3. The chain clamp assembly connects the piston rod with the chain vertical ring, which can adapt to the change of the angle between the piston rod and the horizontal plane due to the change of the length. In conjunction with the chain blocker, the chain tightening operation can be carried out conveniently and quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The specific implementation of the utility model will be further described in detail below with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the working state of the utility model;

[0020] Figure 2 Figures a, b and c are respectively the front view, side view and top view of the cooperation between the card chain assembly and the chain;

[0021] Figure 3 Figure a and Figure b are the front view and side view of the limit pin respectively;

[0022] Figure 4 Figures a and b in the figure are respectively the front view and the side view of the limit pin shaft;

[0023] Figure 5 Figures a, b and c are the front view, side view and top view of the card chain assembly respectively;

[0024] In the figure: 1-fixed seat; 2-pin shaft; 3-hydraulic jack; 4-chain assembly; 4.1-guide plate; 4.2-limiting plate; 4.3-reinforcement plate; 4.4-limiting slot, 4.5-hinge seat, 4.6-limiting hole, 4.7-guide shaft; 5-chain; 6-chain blocker; 7-limiting pin; 8-limiting pin shaft; 8.1-positioning plate; 8.2-positioning hole, 9-chain link; 10-scraper trough body. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] like Figures 1 to 5 As shown, a chain clamping device for tightening the chain of a scraper includes a chain blocker 6, a fixing seat 1, a hydraulic jack 3 and a chain clamping assembly 4. The chain blocker 6 is fixedly arranged in the scraper tank 10 and limits one pair of chain links 9 to prevent the chain link from moving.

[0027] The chain assembly 4 is arranged on one side of the chain blocker 6 and limits the other pair of chain links 9 in an upright state. Preferably, the distance between the chain assembly 4 and the chain blocker 6 is greater than the maximum stroke of the hydraulic jack 3. The chain assembly 4 includes a guide plate 4.1, a limit plate 4.2 and a reinforcing plate 4.3. The limit plate 4.2 is fixedly arranged at the middle of the upper end of the guide plate 4.1 and is perpendicular to the guide plate 4.1. The limit slots 4.4 with lower ends open are symmetrically arranged on both sides of the front of the limit plate 4.2. The chain links 9 in an upright state are inserted into the limit slots 4.4. The left and right sides of the limit plate 4.2 are both provided with limit holes 4.6. The limit holes 4.6 are inserted with limit pins 8. The limit pins 8 pass through the limit slots 4.4 on the corresponding side and are inserted into the chain links 9 in an upright state to prevent the chain links 9 from detaching from the limit plate 4.2. In order to lock the limit pin 8, one end of the limit pin 8 is fixedly connected with a positioning plate 8.1, the limit pin 8 is vertically arranged at the lower side of the positioning plate 8.1, and a positioning hole 8.2 is arranged at the upper side of the positioning plate 8. The left and right sides of the limit plate 4.2 are fixedly provided with guide shafts 4.7, the positioning hole 8.2 of the positioning plate 8.1 is sleeved on the guide shaft 4.7 on the corresponding side, and the outer end of the guide shaft 4.7 is provided with a limit insertion hole and a limit pin 7 is inserted. The limit pin 7 prevents the positioning plate 8.1 and the limit pin 8 from being separated.

[0028] An articulated seat 4.5 is provided between the front of the limit plate 4.2 and the upper end surface of the guide plate 4.1, and is used for articulating with the piston rod. A reinforcing plate 4.3 is provided between the back of the limit plate 4.2 and the upper end surface of the guide plate 4.1. The fixing seat 1 is located on the side of the chain assembly 4 away from the chain blocker 6. The piston rod of the hydraulic jack 3 is tilted downward. The cylinder end of the hydraulic jack 3 is articulated with the fixing seat 1 through the pin 2. The piston rod of the hydraulic jack 3 is articulated with the articulated seat 4.5 of the chain assembly 4.

[0029] Steps:

[0030] Install the chain blocker 6 in the scraper tank 10 with the limiting hole, so that the chain ring 9 at this position is fixed, and the fixing 1 is connected to the cylinder of the hydraulic jack 3 through the pin 2, and the piston rod of the hydraulic jack 3 is connected to the clamping chain assembly 4. Then install the clamping chain assembly 4 at a certain vertical ring of the two chains 5, and its limiting plate 4.2 is in conflict with the front and rear flat rings connected to the vertical ring, and then two limiting pins 8 are inserted from both sides into the limiting plate 4.2 and the vertical ring of the chain ring 9, so that the vertical ring and the clamping chain assembly 4 are connected as a whole. Finally, the limiting pin 7 is passed through the limiting jack at the outer end of the guide shaft 4.7 to prevent the limiting pin 8 from falling out from the side. At this point, the clamping chain assembly 4 is installed.

[0031] The hydraulic valve is turned on to supply liquid to the hydraulic jack. The high-pressure emulsion drives the piston rod of the hydraulic jack 3 to extend, pushing the chain assembly 4 and the vertical ring at that location forward. Since the vertical ring at the chain blocker 6 is also fixed, the chain 5 between the chain assembly 4 and the chain blocker 6 becomes loose. After the tightness of the rest of the chain 5 is moderate, the hydraulic valve is closed to supply liquid. Through the action of the one-way lock, the piston rod of the hydraulic jack 3 maintains the extension. At this time, the chain at the loose location is shortened or replaced with a shorter adjustment chain.

[0032] After the chain tightening operation is completed, the hydraulic valve is reversely supplied with fluid, and the piston rod of the hydraulic jack 3 is retracted. After the taut chain is unloaded and in a natural state, the hydraulic valve is closed, and the chain clamping assembly 4 and the chain blocker 6 are removed in turn, and the entire chain tensioning process is completed.

[0033] Only the preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention, and various changes should be included in the protection scope of the present invention.

Claims

1. A chain clamping device for tightening a chain of a scraper conveyor, comprising a chain blocker (6), characterized in that: It also includes a fixed seat (1), a hydraulic jack (3) and a chain block assembly (4), wherein the chain blocker (6) is fixedly arranged in the scraper tank (10) and limits the position of one pair of chain links (9); The chain assembly (4) is arranged on one side of the chain blocker (6) and limits the position of the other pair of chain links (9) in an upright state; the fixing seat (1) is located on the side of the chain assembly (4) away from the chain blocker (6); the piston rod of the hydraulic jack (3) is arranged to be tilted downward; the cylinder end of the hydraulic jack (3) is hinged to the fixing seat (1) via a pin (2); and the piston rod of the hydraulic jack (3) is hinged to the chain assembly (4); The clamping chain assembly (4) comprises a guide plate (4.1), a limit plate (4.2) and a reinforcing plate (4.3); the limit plate (4.2) is fixedly arranged at the middle of the upper end of the guide plate (4.1) and is perpendicular to the guide plate (4.1); limit clamping grooves (4.4) with lower ends open are symmetrically arranged on both sides of the front of the limit plate (4.2); a hinge seat (4.5) is arranged between the front of the limit plate (4.2) and the upper end surface of the guide plate (4.1); and a reinforcing plate (4.3) is arranged between the back of the limit plate (4.2) and the upper end surface of the guide plate (4.1).

2. A chain clamping device for tightening a chain of a scraper conveyor according to claim 1, characterized in that: The left and right sides of the limit plate (4.2) are both provided with limit holes ( 4.6), a limiting pin shaft (8) is inserted into the limiting hole (4.6), and the limiting pin shaft (8) passes through the limiting slot (4.4) on the corresponding side.

3. A chain clamping device for tightening a chain of a scraper according to claim 2, characterized in that: One end of the limit pin (8) is fixedly connected to a positioning plate (8.1), the limit pin (8) is vertically arranged on the lower side of the positioning plate (8.1), and a positioning hole (8.2) is arranged on the upper side of the positioning plate (8.1); A guide shaft (4.7) is fixedly provided on both the left and right side surfaces of the limit plate (4.2); the positioning hole (8.2) of the positioning plate (8.1) is sleeved on the guide shaft (4.7) on the corresponding side; and a limit insertion hole is provided at the outer end of the guide shaft (4.7) and a limit pin (7) is inserted therein.

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