Hydraulic chain tightener of double-chain scraper conveyor for mine

Abstract

The utility model 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, 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 utility model belongs to the technical field of coal mine tools, in particular to a hydraulic chain tightener for a double-sided chain scraper conveyor used in 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 excavation, as the working face continues to extend inward, the length of the chute and scraper chains must be continuously increased. This chain extension typically requires partial slack before adding additional chain. This slack is typically achieved by securing one end of the chain in a fixed position (usually the headstock) and then operating the controller to rotate the chain. However, this requires frequent start / stop cycles, which can severely damage components like the motor and the vacuum contactor within the switch, shortening the equipment's lifespan. Furthermore, the chain can break during reconnection, potentially causing injury. Utility Model Content

[0004] The utility model aims to provide a hydraulic chain tightener for a double-sided chain scraper conveyor used in mines, so as to locally relax the chain of the double-sided chain scraper conveyor without using the control of the double-sided chain scraper conveyor.

[0005] The utility model adopts the following technical solution: a hydraulic chain tightener for a double-sided chain scraper conveyor for mines, comprising:

[0006] Hydraulic cylinder;

[0007] 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] Furthermore, the pull plate includes:

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

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

[0018] Furthermore, the connecting plate includes:

[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 plate at the front end of the hydraulic cylinder, and the other two connecting chains are connected to the connecting plate 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 utility model are as follows: the utility model adds connecting plates to the front and rear sections of the hydraulic cylinder, then sequentially arranges connecting chains and pulling plates on the connecting plates, and finally installs the pulling 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 This is a structural schematic diagram of a hydraulic chain tightener for a double-sided chain scraper conveyor for mines in the utility model;

[0027] Figure 2 This is a schematic diagram of the hydraulic cylinder of the hydraulic chain tensioner in the embodiment of the present utility model in an extended state;

[0028] Figure 3 This is a schematic diagram of the hydraulic cylinder of the hydraulic chain tensioner in the embodiment of the present utility model in the retracted state.

[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 will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0033] The utility model discloses a hydraulic chain tightener for a double-sided chain scraper conveyor used in mines. Figure 1 As shown, it includes: a hydraulic cylinder 40; a connecting plate 30, which is arranged at the front and rear ends of the hydraulic cylinder 40; a connecting chain 20, which is connected to the connecting plate 30; and 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 connection structure of the pulling plate 10 is the same as the connection mechanism of the scraper 50 of the double-sided chain scraper conveyor.

[0034] In the present invention, the connecting plate 30 can be of various structures and can be designed as needed. For example, it can be a straight plate with through holes formed in it, and then bolted to secure the chain 20. Alternatively, it can be an annular plate, with bolts passing through the chain 20 and the annular plate in sequence to secure the two. In addition, when there are multiple chains 20, the chains can be evenly secured on both sides of the connecting plate 30.

[0035] The structure and dimensions of the pull plate 10 described above are identical to those of the scraper plates on double-sided chain scraper conveyors. Therefore, when needed, the scraper plates 50 at the corresponding locations on the double-sided chains can be removed and the pull plate 10 installed, transmitting the pulling force to both chains. Furthermore, the pull plate 10 is equipped with reinforcing ribs to increase its strength, making it suitable for this application scenario.

[0036] The utility model adds connecting plates 30 to the front and rear ends of the hydraulic cylinder 40, 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. Then, the working chain is pulled by the hydraulic cylinder 40 to tighten a part of the working chain and relax the other part, and the working chain is added or replaced 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, located on at least one connecting chain 20 at the front and / or rear end of the hydraulic cylinder 40. The detachable ring 21 can be used to increase or decrease the effective length of the connecting chain as needed. When the connection location is far from the hydraulic cylinder 40, the connecting chain 20 is added.

[0038] More specifically, there are four connecting chains 20; two of them 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 allows for more uniform force distribution on the pull plate 10 and reduces its strength requirements.

[0039] In addition, the connecting chains 20 also include connecting rings, which are U-shaped half-rings located at the ends of each connecting chain 20 and are used to connect to the pull plate 10, with the U-shaped opening facing the pull plate 10. The ends of the U-shaped half-rings are connected to the pull plate 10 (preferably by welding) to increase the connection contact points and enhance the connection strength.

[0040] More specifically, the pull plate 10 includes a through-hole for the end of the U-shaped half-ring to pass through. Both side surfaces of the pull plate 10 are connected to the U-shaped half-ring at the edges of the through-hole. After the end of the U-shaped half-ring passes through the through-hole, the two sides of the pull plate 10 are welded to the U-shaped half-ring, further increasing the number of weld points and, therefore, the strength of the connection.

[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 a pin role, reducing the difficulty of connecting the connecting chain 20 and the connecting plate 30.

[0042] In the present invention, the hydraulic cylinder 40 has two oil inlets and outlets at the front and rear ends. The front inlet and outlet are connected to a first oil pipe 41, while the rear inlet and outlet are connected to a second oil pipe 42. Both oil pipes are equipped with a check valve 43. Specifically, the check valve 43 is installed on the oil pipe of the hydraulic cylinder 40. The installation of the check valve 43 prevents backflow of hydraulic oil during operation, thereby ensuring the stability of the hydraulic cylinder 40 when it is stationary. Furthermore, an operating switch 44 is installed on the oil pipe to control the operating mode of the hydraulic cylinder 40.

[0043] In summary, the utility model 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 contraction of the hydraulic cylinder 40, and connects the two ends of the hydraulic cylinder 40 to make a chain link, and the other end of the chain link is connected to the horseshoe ring of the scraper chain. The working chain is tightened by the contraction force of the hydraulic cylinder 40, causing the scraper chain inside the chain tightener to relax, so that the chain can be pinched open or tightened.

[0044] The working process of this utility model is:

[0045] First, shut down the double-sided chain scraper conveyor and remove 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. Then, the other pull plate 10 is also installed in the corresponding position of the other scraper 50. After the fixation is completed, the hydraulic cylinder 40 is started to retract until it is received at the shortest position. At this time, the disassembly part of the two working chains will be loose, and 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 follows: Figure 3 As shown in the figure. At this time, since the double-sided chain scraper conveyor is not started, the chain is not tightened. Finally, start the double-sided chain scraper conveyor and tighten the working chain after adding the chain to 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); Connecting plates (30) are arranged at the front and rear ends 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 connect 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. The hydraulic chain tensioner for a double-sided chain scraper conveyor for mines according to 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 rear end of the hydraulic cylinder (40).

3. A hydraulic chain tensioner for a double-sided chain scraper conveyor for mines according to 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 to the pull plate (10), with the U-shaped opening facing the pull plate (10).

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

5. The hydraulic chain tensioner for a double-sided chain scraper conveyor for mines according to claim 4, characterized in that: Both side surfaces of the pull plate (10) are located at the edge of the through hole and are connected to the U-shaped half ring.

6. A hydraulic chain tensioner 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 a bolt.

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

8. The hydraulic chain tensioner for a double-sided chain scraper conveyor for mines according to 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. The hydraulic chain tensioner for a double-sided chain scraper conveyor for mines according to claim 8, characterized in that: Also includes: The reinforcing ribs are arranged on the pull plate (10).

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