Hydraulic chain tightener of double-chain scraper conveyor for mine

Abstract

The invention discloses a hydraulic chain tightener of a double-chain scraper conveyor for a mine. The hydraulic chain tightener comprises a hydraulic oil cylinder, the four connecting plates are arranged on the two sides of the front end and the rear end of the hydraulic oil cylinder respectively; the at least four connecting chains are respectively connected to the connecting plates; the pulling plate is connected to the free end of each connecting chain; wherein the pulling plate is used for being connected with a working chain of the double-side-chain scraper conveyor, and the structure of a connecting part of the pulling plate is the same as that of a connecting mechanism of a scraper of the double-side-chain scraper conveyor; the connecting plates are additionally arranged on the front section and the rear section of the hydraulic oil cylinder, then the connecting chains and the pulling plates are sequentially arranged on the connecting plates, finally, the pulling plates are installed at the positions, where the scraping plates are installed, of the working chains, part of the working chains are loosened through the hydraulic oil cylinder, and the working chains are additionally arranged on the loosened parts or replaced. And continuously extending working surfaces are used.

Description

Technical Field

[0001] The invention belongs to the technical field of tools for coal mines, and in particular relates to a hydraulic chain tightener for a double-sided chain scraper conveyor for mines. Background Art

[0002] Double-sided chain scraper conveyor is a commonly used coal mine transportation equipment. It has two parallel chains with scrapers installed at intervals on the two chains. During operation, the scrapers drive the material to move, thereby realizing the transportation of the material.

[0003] During the excavation process, as the working face continues to extend inward, the length of the chute and scraper chain needs to be continuously increased. When the chain is lengthened, it is usually necessary to partially relax the chain before adding additional chain. When the chain is partially relaxed, one end of the chain is usually fixed in a fixed position (usually the head frame), and then the controller is operated to rotate the chain. However, such operation requires frequent start / stop, which is very harmful to accessories such as the vacuum contactor in the motor and switch, reducing the service life of the equipment. In addition, the chain may break when connecting the chain, causing injury to people. Summary of the invention

[0004] The object of the present invention is to provide a hydraulic chain tightener for a double-sided chain scraper conveyor for use in mines, so as to partially relax the chain of the double-sided chain scraper conveyor without using the control of the double-sided chain scraper conveyor.

[0005] The present invention adopts the following technical scheme: a hydraulic chain tightener for a double-sided chain scraper conveyor for mines, comprising:

[0006] Hydraulic cylinder;

[0007] The connecting plates are respectively arranged at the front end and the rear end of the hydraulic cylinder;

[0008] Connecting chain, connected to the connecting plate;

[0009] a pull plate, connected to the free end of the connecting chain;

[0010] The pull plate is used to connect with the working chain of the double-sided chain scraper conveyor, and the connection structure of the pull plate is the same as the connection mechanism of the scraper of the double-sided chain scraper conveyor.

[0011] Furthermore, it also includes:

[0012] The detachable ring is located on at least one connecting chain at the front end and / or rear end of the hydraulic cylinder.

[0013] Furthermore, it also includes:

[0014] The connecting ring is a U-shaped half ring, located at the end of each connecting chain, and is used to connect with the pull plate, with the U-shaped opening facing the pull plate.

[0015] Further, the pull plate comprises:

[0016] The through hole is used for the end of the U-shaped ring to pass through.

[0017] Furthermore, two side surfaces of the pull plate are connected to the U-shaped ring at the edge of the through hole.

[0018] Furthermore, the connecting plate comprises:

[0019] The connecting hole is a through hole and is detachably connected to the connecting chain by bolts.

[0020] Furthermore, it also includes:

[0021] One-way valve, installed on the oil pipe of the hydraulic cylinder.

[0022] Furthermore, there are four connecting chains; two connecting chains are connected to the connecting plates at the front end of the hydraulic cylinder, and the other two connecting chains are connected to the connecting plates at the rear end of the hydraulic cylinder.

[0023] Furthermore, it also includes:

[0024] The reinforcing ribs are arranged on the pull plate.

[0025] The beneficial effects of the present invention are as follows: the present invention adds connecting plates to the front and rear sections of the hydraulic cylinder, and then sequentially arranges connecting chains and pull plates on the connecting plates, and finally installs the pull plates at the position where the scraper is installed on the working chain, thereby loosening a part of the working chain through the hydraulic cylinder, and adding or replacing the working chain in the loose part to use a continuously extending working surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a hydraulic chain tightener of a double-sided chain scraper conveyor for mines in the present invention;

[0027] Figure 2 Schematic diagram of the hydraulic cylinder of the hydraulic chain tensioner in the embodiment of the present invention in the extended state;

[0028] Figure 3 Schematic diagram of the hydraulic cylinder retracted state of the hydraulic chain tensioner in an embodiment of the present invention.

[0029] Among them: 10. Pull plate; 20. Connecting chain; 21. Removable ring; 30. Connecting plate;

[0030] 40. Hydraulic cylinder; 41. First oil pipe; 42. Second oil pipe; 43. One-way valve; 44. Operating valve plate;

[0031] 50. Scraper. DETAILED DESCRIPTION

[0032] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] The invention discloses a hydraulic chain tightener for a double-sided chain scraper conveyor for a mine, such as Figure 1 As shown, it includes: a hydraulic cylinder 40; a connecting plate 30, which is arranged at the front end and the rear end of the hydraulic cylinder 40; a connecting chain 20, which is connected to the connecting plate 30; a pulling plate 10, which is connected to the free end of the connecting chain 20; wherein the pulling plate 10 is used to connect with the working chain of the double-sided chain scraper conveyor, and the connecting part structure of the pulling plate 10 is the same as the connecting mechanism of the scraper 50 of the double-sided chain scraper conveyor.

[0034] In the present invention, the connecting plate 30 can be of different structures and can be designed as needed, such as a straight plate with through holes formed on the straight plate, and then bolts are used to fix the chain 20. It can also be an annular plate, and bolts are passed through the chain 20 and the annular plate in sequence to fix the two. In addition, when there are multiple chains 20, the chains can be evenly fixed on both sides of the connecting plate 30.

[0035] The structure and size of the pull plate 10 are consistent with the scraper on the double-sided chain scraper conveyor. Therefore, when it is needed, the scraper 50 at the corresponding position on the double-sided chain can be removed, and the pull plate 10 can be installed, and the pulling force is transmitted to the two chains through the pull plate 10. In addition, the pull plate 10 is provided with reinforcing ribs to increase the strength of the pull plate 10, which can be suitable for this use scenario.

[0036] The present invention adds connecting plates 30 to the front and rear ends of the hydraulic cylinder 40, and then sequentially arranges a connecting chain 20 and a pulling plate 10 on the connecting plate 30, and finally installs the pulling plate 10 at the position where the scraper 50 is installed on the working chain, and then pulls the working chain through the hydraulic cylinder 40 to tighten a part of the working chain and relax the other part, and adds or replaces the working chain in the relaxed part to adapt to the continuously extending working surface.

[0037] In one embodiment, a detachable ring 21 is provided on the chain, which is located on at least one connecting chain 20 at the front end and / or rear end of the hydraulic cylinder 40. The detachable ring 21 can be used to increase or decrease the length of the effective connecting chain as needed. When the connection position is far from the hydraulic cylinder 40, the connecting chain 20 is added.

[0038] More specifically, there are four connecting chains 20, two of which are connected to the connecting plate 30 at the front end of the hydraulic cylinder 40 (one connecting plate 30 may be provided for each chain), and the other two connecting chains 20 are connected to the connecting plate 30 at the rear end of the hydraulic cylinder 40. This can make the force on the pull plate 10 more uniform and reduce its strength requirements.

[0039] In addition, the connecting chain 20 also includes a connecting ring, which is a U-shaped half ring, located at the end of each connecting chain 20, and is used to connect with the pull plate 10, and the U-row opening faces the pull plate 10. The two ends of the U-shaped ring are connected to the pull plate 10 (preferably welded) to increase the connection contact points and increase the connection strength.

[0040] More specifically, the pull plate 10 includes a through hole for the end of the U-shaped ring to pass through. The two side surfaces of the pull plate 10 are connected to the U-shaped ring at the edge of the through hole. After the end of the U-shaped ring passes through the through hole, the two surfaces of the pull plate 10 are welded to the U-shaped ring respectively, further increasing the number of welding points, that is, further increasing the connection strength.

[0041] As a specific implementation, the connecting plate 30 includes a connecting hole, which is a through hole, and is detachably connected to the connecting chain 20 by a bolt. In this way, the bolt plays the role of a pin, reducing the difficulty of connecting the connecting chain 20 and the connecting plate 30.

[0042] In the present invention, the front and rear ends of the hydraulic oil cylinder 40 have two oil inlets and outlets, the front end oil inlet and outlet are connected to the first oil pipe 41, and the rear end oil inlet and outlet are connected to the second oil pipe 42. A one-way valve 43 is installed on both oil pipes, that is, the one-way valve 43 is installed on the oil pipe of the hydraulic oil cylinder 40. The one-way valve 43 can prevent the hydraulic oil from flowing back during the working process, thereby ensuring the stability of the hydraulic oil cylinder 40 when it is in a stationary state. In addition, an operating switch 44 is also installed on the oil pipe, and the operating switch can control the working mode of the hydraulic oil cylinder 40.

[0043] In summary, the present invention utilizes the pressure of the emulsion pump station plus the hydraulic support operating valve plate (i.e., the operating switch) as the power source and control system to control the extension and retraction of the hydraulic cylinder 40, connects the two ends of the hydraulic cylinder 40 to make a chain ring, and the other end of the chain ring is connected to the horseshoe ring of the scraper chain. The contraction force of the hydraulic cylinder 40 is used to tighten the working chain, causing the scraper chain inside the chain tightener to loosen, so that the chain can be pinched open or tightened.

[0044] The working process of the present invention is:

[0045] First, shut down the double-sided chain scraper conveyor and disassemble the double-sided chain from the detachable part. Then, remove the scraper 50 at the corresponding position of the pull plate 10 at the front / rear end of the hydraulic cylinder 40, as shown in the figure. Figure 2 As shown, the pull plate 10 is installed in this position. The hydraulic cylinder 40 is extended to the longest position. Next, the other pull plate 10 is also installed in the corresponding position of the other scraper 50. After the fixing is completed, the hydraulic cylinder 40 is started to retract until it is received at the shortest position. At this time, the two working chains will be loose at the disassembly point. The staff will install the additional connecting chain 20 to the working chain and extend the hydraulic cylinder 40 to the longest position. The state is as shown in FIG. Figure 3As shown. At this time, since the double-sided chain scraper conveyor is not started, the chain will not be tightened. Finally, start the double-sided chain scraper conveyor, tighten the working chain after adding the chain, and complete the operation.

Claims

1. A hydraulic chain tightener for a double-sided chain scraper conveyor for mines, characterized in that: include: Hydraulic cylinder (40); A connecting plate (30) is arranged at the front end and the rear end of the hydraulic cylinder (40); A connecting chain (20) connected to the connecting plate (30); A pull plate (10) connected to the free end of the connecting chain (20); The pull plate (10) is used to be connected to the working chain of the double-sided chain scraper conveyor, and the connection structure of the pull plate (10) is the same as the connection mechanism of the scraper (50) of the double-sided chain scraper conveyor.

2. A hydraulic chain tightener for a double-sided chain scraper conveyor for mines as claimed in claim 1, characterized in that: Also includes: A detachable ring (21) is located on at least one connecting chain (20) at the front end and / or the rear end of the hydraulic cylinder (40).

3. A hydraulic chain tightener for a double-sided chain scraper conveyor for mines as claimed in claim 2, characterized in that: Also includes: The connecting ring is a U-shaped half ring, located at the end of each connecting chain (20), and is used to connect with the pulling plate (10), and the U-shaped opening faces the pulling plate (10).

4. A hydraulic chain tightener for a double-sided chain scraper conveyor for mines as claimed in claim 2 or 3, characterized in that: The pull plate (10) comprises: A through hole is used for allowing the end of the U-shaped ring to pass through.

5. A hydraulic chain tightener for a double-sided chain scraper conveyor for mines as claimed in claim 4, characterized in that: Two side surfaces of the pulling plate (10) are located at the edge of the through hole and are connected to the U-shaped ring.

6. A hydraulic chain tightener for a double-sided chain scraper conveyor for mines as claimed in claim 4, characterized in that: The connecting plate (30) comprises: The connecting hole is a through hole and is detachably connected to the connecting chain (20) via bolts.

7. A hydraulic chain tightener for a double-sided chain scraper conveyor for mines as claimed in claim 2, characterized in that: Also includes: A one-way valve (43) is installed on the oil pipe of the hydraulic cylinder (40).

8. A hydraulic chain tightener for a double-sided chain scraper conveyor for mines as claimed in claim 7, characterized in that: The number of the connecting chains (20) is four; two of the connecting chains (20) are connected to the connecting plate (30) at the front end of the hydraulic cylinder (40), and the other two connecting chains (20) are connected to the connecting plate (30) at the rear end of the hydraulic cylinder (40).

9. A hydraulic chain tightener for a double-sided chain scraper conveyor for mines as claimed in claim 8, characterized in that: Also includes: The reinforcing ribs are arranged on the pulling plate (10).

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