Pipe replacement connecting device for high-pressure rubber pipe of hydraulic support

Abstract

The utility model discloses a hydraulic support high-pressure rubber pipe replacement connecting device, and belongs to the technical field of coal mine pipeline tools. The shaft hole in one end of the connector A corresponds to the shaft hole in one end of the connector B in position. And the connector A and the connector B are connected through a hexagon socket screw. And the cavity A in the connector A and the cavity B in the connector B are buckled to form an accommodating cavity. The shaft holes of the connectors A and the shaft holes of the connectors B on the same side are connected together through the two ends of the connecting chains respectively. The connecting device is simple in structure, reliable in connection and convenient and fast to operate. The connector is of an opening-closing type outer surrounding structure, the rubber pipe connector is effectively protected, and damage to the connector and a sealing piece when the rubber pipe is dragged is reduced. The connecting chain can guarantee the connecting strength, the head portion is smooth and round and can be bent along with the turning position in the dragging process, the connector is tightly connected with the rubber hose connector, the stress direction of the connector is the axial direction in the dragging process, and the inside hexagonal bolt cannot be broken off.

Description

Technical Field

[0001] The utility model belongs to the technical field of coal mine pipeline tools, in particular to a hydraulic support high-pressure hose replacement connection device, which can be used when the hydraulic support replaces the high-pressure hose. Background Art

[0002] The W3-1506 coal mining face of Xiaoqing Coal Mine has an average coal seam thickness of 1.5 meters. It uses a low coal mining machine with a thin coal seam hydraulic support ZY5200 / 08 / 18D for mining. During the first month of mining on the face, 35 DN19 liquid inlet pipes were found to be damaged and very difficult to replace. According to the standard connection method, it takes 1.5 hours to replace a liquid inlet pipe, which affects the normal production of the face. Using a non-standard connection method, the connected liquid inlet pipe is suspended between the bracket and the cable trough, making it impossible for operators to pass through. This has caused operators to trip over the suspended liquid inlet pipe many times, posing a great safety hazard. In summary, the problem of the difficulty in replacing the liquid inlet pipe of the ZY5200 / O8 / 18D hydraulic support must be solved.

[0003] Problem Analysis:

[0004] The hydraulic support pipeline layout of the W3-1506 coal mining face in Xiaoqing Coal Mine is as follows: the hydraulic support inlet and return main pipeline is installed on the conveyor cable trough, and is connected to the hydraulic support electromagnetic reversing valve through two DN19X3.8m high-pressure hoses to supply fluid to the hydraulic support. Figure 1 As shown: Figure 1 Middle: 11-cable trough, 12-main liquid inlet pipe, 13-DN19 liquid inlet pipe, 14-sliding frame, 15-electromagnetic reversing valve, 16-hydraulic support.

[0005] The ZY5200 / 08 / 18D hydraulic support push frame is welded with four steel plates, and the inside of the frame is hollow. There are two square holes at the front end of the push frame and two square holes at the middle and rear ends. Two DN19X3.8m high-pressure hoses are inserted from the two square holes at the front end, passed through the inside of the push frame, and led out from the two square holes at the middle and rear ends to connect with the electromagnetic reversing valve. Figure 2-3 As shown: Figure 2-3 Middle: 21-front square hole, 22-middle and rear square hole.

[0006] The mining height of the W3-1506 working face is relatively low, and the DN19 liquid inlet pipe is often squeezed into the gap between the push frame and the base, causing damage. When the frame is pulled, coal gangue enters the push frame through the square hole at the front end of the push frame, causing the push frame to be filled with coal gangue. Since the DN19 liquid inlet pipe is inside the push frame, it is squeezed and compacted by coal gangue, making it very difficult to replace the pipeline.

[0007] Method for replacing pipelines by standard vertebrae: Two employees are required to work together. First, hang a crane on the front end of the bracket top beam, and then hang a crane behind the bracket electromagnetic reversing valve. First, use the crane chain at the front end of the top beam to tie the DN19 liquid inlet pipe in the front square hole, and then use the crane chain behind the electromagnetic reversing valve to tie the DN19 liquid inlet pipe in the middle and rear square holes. One employee operates the crane on the front end of the top beam to pull the DN19 liquid inlet pipe out of the push frame, and another employee operates the crane behind the electromagnetic reversing valve to loosen the chain. When all the DN19 liquid inlet pipes are pulled out of the push frame, the crane chain behind the electromagnetic reversing valve is also led out of the push frame. Remove the damaged DN19 liquid inlet pipe, tie one end of the new DN19 liquid inlet pipe with the crane chain behind the electromagnetic reversing valve, and tie the other end of the new DN19 liquid inlet pipe with the crane chain at the front end of the top beam. The employee behind the solenoid reversing valve operates the crane to tighten the chain and introduce the new DN19 liquid inlet pipe into the sliding frame. At the same time, the employee at the front end of the top beam operates the crane to loosen the chain.

[0008] Since the crane chain is tied to the DN19 inlet pipe body, the DN19 inlet pipe head and the pipe body are not on the same running track, the DN19 inlet pipe head is violently scraped and stuck with the hard coal gangue in the push frame during the forward movement, generating great resistance. If the crane worker behind the electromagnetic reversing valve feels that the resistance is too great, he will loosen the chain. The worker at the front end of the top beam operates the crane to tighten the chain and pull it back in the opposite direction. This is repeated many times before the new DN19 inlet pipe can be dragged out of the push frame and replaced with the new DN19 inlet pipe.

[0009] Method for replacing pipelines in a non-standard way: an employee is required to remove one end of the DN19 liquid inlet pipe on the main line of the cable trough, and remove the other end of the DN19 liquid inlet pipe on the electromagnetic reversing valve. Connect one end of the new DN19 liquid inlet pipe to the main line of the cable trough, and the other end to the electromagnetic reversing valve, and open the bracket stop valve to use it normally. However, after the DN19 liquid inlet pipeline is passed through the high-pressure liquid, the pipeline will become hard and cannot be bent. It will be suspended between the cable trough and the bracket base, about 400mm from the floor. It is very difficult for people to walk, and operators often trip and fall, which is easy to cause people to fall and injure people, posing a great safety hazard.

[0010] Therefore, according to the fact that the DN19 liquid inlet pipeline of ZY5200 / 08 / 18D hydraulic support is often damaged during operation, and the problem of difficulty in on-site replacement due to the need to push the hose through the frame under the support, this hose connection device was manufactured. Utility Model Content

[0011] The utility model aims to provide a hydraulic support high-pressure rubber hose replacement connection device, which can conveniently pull out the high-pressure rubber hose that needs to be replaced.

[0012] The technical solution adopted is:

[0013] A hydraulic support high-pressure rubber hose replacement connection device comprises two connectors and a connection chain.

[0014] Each connector includes a connector A and a connector B.

[0015] The axial hole at one end of the connector A corresponds to the axial hole at one end of the connector B.

[0016] The connector A and the connector B are connected by a hexagon socket bolt.

[0017] A cavity A is provided inside the connector A, and a cavity B is provided inside the connector B. When the cavity A and the cavity B are buckled relative to each other, an accommodating cavity is formed.

[0018] The two ends of the connecting chain respectively connect the axial hole of the connecting head A and the axial hole of the connecting head B on the same side.

[0019] Its advantages are:

[0020] 1. The connecting device has a simple structure, reliable connection and convenient and quick operation.

[0021] 2. Because the connector adopts an open-and-close outer enclosure structure, the hose joint is effectively protected, reducing damage to the joint and seal when pulling the hose.

[0022] 3. The two connectors are connected by an iron chain to ensure the connection strength. The head is smooth and round, and can bend with the turns during dragging to prevent scratching.

[0023] 4. Small size, light weight, easy to carry, reducing the burden of employees carrying tools.

[0024] 5. The connector and the hose joint are tightly connected. During the dragging process, the force direction of the connector is axial, and the hexagon socket bolt is subjected to less force, which will not cause the connector to separate due to bolt breakage, so the connection is safe and reliable.

[0025] 6. Quickly, safely and reliably connect the old and new hoses, pull out the old hose and introduce the new hose into the push frame at the same time, complete the replacement of the pipeline at one time, reduce the damage of the hose, improve work efficiency, and effectively ensure the normal production of the working surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is the layout diagram of the DN19 liquid inlet hose.

[0027] Figure 2 This is a diagram of the internal structure of the push frame.

[0028] Figure 3 This is a cross-sectional view of the internal structure of the sliding frame.

[0029] Figure 4 It is a structural schematic diagram of the utility model.

[0030] Figure 5 This is the front view of connector A.

[0031] Figure 6 A top view of connector A.

[0032] Figure 7 This is the front view of connector B.

[0033] Figure 8 A top view of connector B.

[0034] Connector A1, connector B2, connector 3, hexagon socket bolt 4, accommodating cavity 5, connecting chain 6. DETAILED DESCRIPTION

[0035] In combination with the actual working conditions on site, it was decided to develop a special high-pressure hose connection device. Through simple and quick operations, the old hose to be replaced can be connected with the new hose. Then, the old hose can be pulled out of the sliding frame by a crane and the new hose can be pulled into the sliding frame to complete the replacement of the high-pressure hose.

[0036] The hydraulic support high-pressure rubber hose replacement connection device comprises two connectors 3 and a connection chain 6 (iron chain).

[0037] Each connector 3 includes a connector A1 and a connector B2.

[0038] The axial hole at one end of the connector A1 corresponds to the axial hole at one end of the connector B2.

[0039] The connector A1 and the connector B2 are connected via a hexagon socket bolt 4 .

[0040] A cavity A is provided inside the connector A1, and a cavity B is provided inside the connector B2. When the cavity A and the cavity B are buckled relative to each other, an accommodating cavity 5 is formed.

[0041] Use 3-5 sections of connecting chain 6 (the width of the chain links does not exceed the outer diameter of the connector 3) to connect the axial holes of the two connectors A1 and the connector B2 together, that is, the chain links at both ends of the connecting chain 6 pass through the connector axial holes to ensure that the two halves of the connector can rotate along the chain links passing through the axial holes.

[0042] Furthermore, the shaft hole end of the connector A1 and the shaft hole end of the connector B2 are combined into a semicircular head.

[0043] The cylindrical connector 3 is an axially split half opening and closing structure, which can be rotated around the connector axial hole to open the connector 3 along the axial centerline direction. After closing, the connector 3 is fastened by the hexagon socket bolt 4 to form a whole, ensuring that the two halves of the connector A and B cannot be opened.

[0044] The internal shape and size of the accommodating cavity 5 are processed according to the shape and size of the DN19 high-pressure hose pipe joint and are slightly larger, and a 1mm gap is ensured between the DN19 pipe joint and each part. The outer diameter of the connector 3 is the maximum outer diameter of the DN19 high-pressure hose, ensuring that there is no obstruction when moving in the push frame.

[0045] Specific operation method of high pressure hose connection device:

[0046] When replacing the high-pressure hose, remove the old hose to be replaced from the electromagnetic reversing valve of the hydraulic support and the main inlet and return liquid pipeline, connect one end to the crane and tie it tightly, remove the hexagon socket bolt 4 on one connector 3 of the high-pressure hose replacement connection device of the hydraulic support, open a connector 3 and buckle it on the other end of the old hose to be replaced, install the hexagon socket bolt 4 and tighten it. On the other side, connect and fix one end of the new high-pressure hose to the other connector 3 of the high-pressure hose replacement connection device of the hydraulic support in the same way, so that the connection between the new and old hoses is completed, and then pull the crane to slowly pull the old hose out of the push frame, and at the same time, under the drive of the high-pressure hose replacement connection device of the hydraulic support, the new high-pressure hose is also introduced into the push frame, and then the connection device is removed from the new and old hoses, and the new hose is connected to the electromagnetic reversing valve of the hydraulic support and the main inlet and return liquid pipeline, that is, the replacement of the entire high-pressure hose is completed.

[0047] Application effect and economic benefits:

[0048] After the new pipe replacement tool was used at the W3-1506 working face of Xiaoqing Mine, the effect was very ideal. It used to take 2 employees 1.5 hours to replace a hose, but now it only takes 1 employee 0.5 hours to complete it, improving work efficiency by more than 6 times.

[0049] 1. Labor cost savings: Before the transformation, DN19 high-pressure pipes needed to be processed 60 times per month. Each processing required 2 employees to spend 1.5 hours. The labor cost of one employee per hour was about 45 yuan. Based on the calculation that the W3-1506 working face can be mined for 28 months, the labor cost was approximately:

[0050] 28 months × 60 times × 2 people × 1.5 hours × 45 yuan = 226,800 yuan

[0051] After the improvement, the labor cost is approximately:

[0052] 28 months × 60 times × 1 person × 0.5 hours × 45 yuan = 37,800 yuan

[0053] After the improvement, the annual labor cost savings can be approximately:

[0054] 226,800 yuan - 37,800 yuan = 189,000 yuan

[0055] 2. Renovation costs:

[0056] Material cost: 50 yuan

[0057] Other costs (including processing fee + labor cost) 500 yuan

[0058] The total cost is: 50+500=550 yuan

[0059] 3. Create total economic value:

[0060] Creating economic value = labor savings - transformation costs

[0061] = 189,000 yuan - 550 yuan = 188,450 yuan = 188,450 yuan

[0062] Safety value:

[0063] After the working face uses the hose connecting device to replace the hose, it can avoid the risk of working face operators being tripped and fallen by the pipeline. It also reduces the use of cranes, reduces equipment investment and employee operation, and prevents safety accidents such as equipment damage and personal injury caused by poor coordination between the two cranes. It truly protects the health of front-line employees underground and effectively improves the safety of coal mining working faces.

[0064] 6. Application prospects and social benefits

[0065] Xiaoqing Mine used intelligent short coal mining machine for mining for the first time, and various faults of new equipment occurred frequently. It is of great significance to continuously strengthen the research on the working principle of hydraulic support, steadily improve the working performance, improve labor efficiency, reduce the labor intensity of coal mining team workers, and ensure the normal production of the working face.

Claims

1. A hydraulic support high pressure hose replacement connection device, comprising two connectors (3) and a connection chain (6), characterized in that: Each connector (3) comprises a connector A (1) and a connector B (2); The shaft hole at one end of the connector A (1) corresponds to the shaft hole at one end of the connector B (2); The connector A (1) and the connector B (2) are connected by a hexagon socket bolt (4); A cavity A is provided inside the connector A (1), and a cavity B is provided inside the connector B (2). When the cavity A and the cavity B are buckled relative to each other, a receiving cavity (5) is formed. The two ends of the connecting chain (6) respectively connect the axial hole of the connecting head A (1) and the axial hole of the connecting head B (2) on the same side.

2. The hydraulic support high pressure hose replacement connection device according to claim 1 is characterized in that: The shaft hole end of the connector A (1) and the shaft hole end of the connector B (2) form a semicircular head.

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