Scraper chain puller

Abstract

The utility model relates to the technical field of nut dismounting tools, and discloses a scraper chain chest expander which comprises a connecting block, a chain distributed in a circle is arranged below the connecting block, the two ends of the chain are connected with the two sides of the connecting block respectively, a threaded rod is arranged at the upper end of the connecting block, and the threaded rod is connected with the connecting block. The lower part of the threaded rod penetrates through the connecting block and is in threaded connection with the connecting block; the chain comprises a plurality of sets of connecting pieces, each set of connecting pieces comprises two connecting pieces which are arranged side by side in parallel, and connecting shafts used for being connected with the adjacent set of connecting pieces are arranged at the two ends of each set of connecting pieces respectively. When a nut is disassembled, each group of connecting pieces of the chain are respectively clamped at each position of the outer side of the nut needing to be disassembled, and when the threaded rod and the connecting block are rotated, the nut can be conveniently driven to rotate, so that the nut can be conveniently disassembled.

Description

Technical Field

[0001] The utility model relates to the technical field of nut disassembly tools, in particular to a chain tensioner for a scraper conveyor. Background Art

[0002] A nut is a fixing tool with a hole in the center and threads on the inside of the hole. It is screwed together with a bolt or a screw to tighten. Nuts are parts that tightly connect various components in mechanical equipment. Maintenance personnel often encounter difficulties in removing nuts during maintenance work. For example, a 20-inch bolt is normally removed with a 30-inch plum wrench. Some nuts are prone to rust due to long-term exposure to corrosive gases. When removed with a 30-inch plum wrench, they will slip, posing a safety hazard to the operator. A smaller wrench cannot be used, and many places in chemical plants cannot be cut with fire. Therefore, whenever this happens, it causes considerable trouble to the maintenance operators. Utility Model Content

[0003] The purpose of the utility model is to provide a chain tensioner for a scraper conveyor to solve the problem proposed in the above-mentioned background technology that the nuts are prone to rust due to being exposed to corrosive gases for a long time, and will slip when disassembled with a 30-diameter plum wrench, posing a safety hazard to the operators, and a smaller wrench cannot be used, and fire cutting is not allowed in many places in chemical plants. Therefore, whenever this situation is encountered, it causes considerable trouble to the maintenance operators.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a chain tensioner for a scraper, comprising a connecting block, a circularly distributed chain is arranged below the connecting block, two ends of the chain are respectively connected to two sides of the connecting block, a threaded rod is arranged at the upper end of the connecting block, and the lower part of the threaded rod passes through the connecting block and is threadedly connected to the connecting block;

[0005] The chain comprises a plurality of groups of connecting plates, each group of connecting plates comprises two connecting plates arranged side by side in parallel, and both ends of each group of connecting plates are respectively provided with connecting shafts for connecting with an adjacent group of connecting plates.

[0006] Furthermore, a threaded sleeve which is sleeved on the outside of the threaded rod is provided at the upper end of the connection block, and the threaded sleeve is threadedly connected to the threaded rod.

[0007] Furthermore, a rotating handle is provided at the upper end of the threaded rod for driving the threaded rod to rotate.

[0008] Furthermore, a clamping plate is rotatably installed below the threaded rod and is pressed against one side of the nut. A rotatable connecting sleeve is provided above the clamping plate. The clamping plate is rotatably connected to the lower end of the threaded rod through the rotatable connecting sleeve. The diameter of the clamping plate is larger than the diameter of the threaded rod.

[0009] Furthermore, a trapezoidal notch that matches the outer side of the thread to be removed is provided at one end of the clamping plate away from the threaded rod.

[0010] Furthermore, connecting sliders are slidably arranged on both sides of the connecting block, and both connecting sliders are provided with connecting through holes for the connecting shaft of the chain to pass through, and the connecting block is provided with fixing bolts for fixing the position of the connecting sliders.

[0011] Furthermore, the connecting slider is arranged with a plurality of fixing through holes for fixing bolts to pass through, and the connecting block is provided with threaded through holes for fixing bolts to pass through, and the fixing bolts pass through the threaded through holes and the fixing through holes respectively to fix the connecting slider on both sides of the connecting block.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model provides a ring-shaped chain on the connecting block. When the nut is disassembled, each group of connecting pieces of the chain is respectively clamped at various positions outside the nut to be disassembled. When the threaded rod and the connecting block are rotated, the nut can be easily driven to rotate, and the nut can be easily disassembled. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of a chain tensioner for a scraper conveyor according to the utility model;

[0015] Figure 2 This is a schematic diagram of the overall structure of a connecting block of a chain tensioner of a scraper conveyor according to the utility model;

[0016] Figure 3 This is an exploded view of a connection block of a chain tensioner of a scraper conveyor according to the utility model;

[0017] Figure 4 The utility model is a schematic diagram of the structure of a chain of a scraper chain tensioner.

[0018] In the figure: 1, connecting block; 101, threaded through hole; 11, threaded sleeve; 12, connecting slider; 1201, fixing through hole; 1202, connecting through hole; 13, fixing bolt; 2, threaded rod; 21, rotating handle; 22, clamping plate; 2201, trapezoidal notch; 23, rotating connecting sleeve; 3, chain; 31, connecting plate; 32, connecting shaft. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0020] See also Figure 1-Figure 4 As shown, the utility model provides a technical solution: a chain tensioner for a scraper, comprising a connecting block 1, a circularly distributed chain 3 is arranged below the connecting block 1, two ends of the chain 3 are respectively connected to two sides of the connecting block 1, a threaded rod 2 is arranged at the upper end of the connecting block 1, and the lower part of the threaded rod 2 passes through the connecting block 1 and is threadedly connected to the connecting block 1;

[0021] The chain 3 includes a plurality of groups of connecting plates 31 , each group of connecting plates 31 includes two connecting plates 31 arranged side by side in parallel, and both ends of each group of connecting plates 31 are respectively provided with connecting shafts 32 for connecting with an adjacent group of connecting plates 31 .

[0022] In the utility model, during use, the chain 3 is first put on the outside of the nut that needs to be disassembled, and then the connecting block 1 is held with one hand, and the threaded rod 2 is rotated with the other hand to drive the threaded rod 2 to move toward the nut that needs to be disassembled, so that one end of the threaded rod 2 is against the outside of the nut that needs to be disassembled. At this time, each group of connecting pieces 31 of the chain 3 is respectively stuck at various positions on the outside of the nut that needs to be disassembled. When the threaded rod 2 and the connecting block 1 are rotated, the nut can be easily driven to rotate, and the nut can be easily disassembled.

[0023] Furthermore, a threaded sleeve 11 is provided at the upper end of the connection block 1 and is sleeved on the outer side of the threaded rod 2 . The threaded sleeve 11 is threadedly connected to the threaded rod 2 .

[0024] Furthermore, a rotating handle 21 for driving the threaded rod 2 to rotate is provided at the upper end of the threaded rod 2 .

[0025] Furthermore, a clamping plate 22 is rotatably installed below the threaded rod 2 and is pressed against one side of the nut. A rotatable connecting sleeve 23 is provided above the clamping plate 22. The clamping plate 22 is rotatably connected to the lower end of the threaded rod 2 via the rotatable connecting sleeve 23. The diameter of the clamping plate 22 is larger than the diameter of the threaded rod 2.

[0026] Furthermore, a trapezoidal notch 2201 that matches the outer side of the thread to be removed is provided at one end of the clamping plate 22 away from the threaded rod 2 .

[0027] Furthermore, connecting sliders 12 are slidably provided on both sides of the connecting block 1, and both connecting sliders 12 are provided with connecting through holes 1202 for the connecting shaft 32 of the chain 3 to pass through. The connecting block 1 is provided with fixing bolts 13 for fixing the position of the connecting sliders 12.

[0028] Furthermore, the connecting slider 12 is arranged with a plurality of fixing through holes 1201 for the fixing bolts 13 to pass through, and the connecting block 1 is provided with threaded through holes 101 for the fixing bolts 13 to pass through, and the fixing bolts 13 pass through the threaded through holes 101 and the fixing through holes 1201 respectively to fix the connecting slider 12 on both sides of the connecting block 1.

[0029] Working principle: by setting connecting sliders 12 on both sides of the connecting block 1 to connect with the two ends of the chain 3, by adjusting the connecting sliders 12 to be close to or away from the connecting block 1, the two ends of the chain 3 close to the connecting block 1 can be tightened or loosened relative to each other, and nuts of different sizes can be disassembled, which can improve the scope of application of the device.

[0030] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

Claims

1. A chain tensioner for a scraper conveyor, characterized in that: It comprises a connecting block (1), a circularly distributed chain (3) is arranged below the connecting block (1), two ends of the chain (3) are respectively connected to two sides of the connecting block (1), a threaded rod (2) is arranged at the upper end of the connecting block (1), and the lower part of the threaded rod (2) passes through the connecting block (1) and is threadedly connected to the connecting block (1); The chain (3) comprises a plurality of groups of connecting plates (31), each group of connecting plates (31) comprises two connecting plates (31) arranged side by side in parallel, and connecting shafts (32) for connecting with an adjacent group of connecting plates (31) are respectively arranged at both ends of each group of connecting plates (31).

2. A scraper chain tensioner according to claim 1, characterized in that: The upper end of the connection block (1) is provided with a threaded sleeve (11) which is sleeved on the outer side of the threaded rod (2), and the threaded sleeve (11) is threadedly connected to the threaded rod (2).

3. A scraper chain tensioner according to claim 1, characterized in that: The upper end of the threaded rod (2) is provided with a rotating handle (21) for driving the threaded rod (2) to rotate.

4. A scraper chain tensioner according to claim 1, characterized in that: A clamping plate (22) is rotatably mounted below the threaded rod (2) and is pressed against one side of the nut. A rotatable connecting sleeve (23) is provided above the clamping plate (22). The clamping plate (22) is rotatably connected to the lower end of the threaded rod (2) via the rotatable connecting sleeve (23). The diameter of the clamping plate (22) is greater than the diameter of the threaded rod (2).

5. A scraper chain tensioner according to claim 4, characterized in that: The end of the clamping plate (22) away from the threaded rod (2) is provided with a trapezoidal notch (2201) that matches the outer side of the thread to be removed.

6. A scraper chain tensioner according to claim 1, characterized in that: Connecting sliders (12) are slidably arranged on both sides of the connecting block (1), and both connecting sliders (12) are provided with connecting through holes (1202) for allowing the connecting shaft (32) of the chain (3) to pass through. The connecting block (1) is provided with fixing bolts (13) for fixing the position of the connecting sliders (12).

7. A chain tensioner for a scraper conveyor according to claim 6, characterized in that: The connecting slider (12) is provided with a plurality of fixed through holes (1201) for the fixing bolts (13) to pass through, and the connecting block (1) is provided with threaded through holes (101) for the fixing bolts (13) to pass through. The fixing bolts (13) pass through the threaded through holes (101) and the fixed through holes (1201) respectively to fix the connecting slider (12) on both sides of the connecting block (1).

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