Coal mine excavation support device

Abstract

The present invention relates to the technical field of tunnel support. The present application discloses a coal mine excavation support device, including a connection seat, the connection seat is fixedly mounted on the top of the installation pad, a limited side plate I is fixedly mounted on the top of the connection seat near the two sides, an expansion bag I is arranged at the top of the connection seat between the limited side plates I, a scratch-proof sleeve I is arranged on the top of the connection seat, and the two ends of the scratch-proof sleeve I are respectively fixedly connected to the outer side of the limited side plate I. Liquid is discharged through the drainage pipe port and enters the inside of the expansion bag I through the pipeline and the liquid guide pipe port. The hydraulic pressure inside the expansion bag I rises. Under this action, the expansion bag I will expand upward under the limit of the limited side plate I and contact with the top of the tunnel. The surface of the expansion bag I can achieve a tight fit with the top of the tunnel, avoiding the problem of cracks in the top structure of the tunnel caused by the huge force caused by rigid contact, resulting in roof fall or collapse, thereby improving the safety performance of the device.

Description

Technical Field

[0001] The present application relates to the technical field of tunnel support, and in particular to a coal mine excavation support device. Background Art

[0002] During coal mine excavation, support devices are needed to support the tunnels to avoid tunnel roof collapse. Traditional support devices use hydraulic devices to lift the support plates and contact them with the top of the tunnel to achieve the support effect. They have a simple structure and are easy to use. However, the support plates in traditional support devices are often made of hard plates, and the top of the tunnel is often uneven, which makes the contact between the support plates and the top of the tunnel hard, causing the uneven top of the tunnel to crack and break, which poses a safety hazard to tunnel roof collapse and collapse in the later stage. Summary of the invention

[0003] The present application proposes a coal mine excavation support device, which has the advantage of achieving soft contact between the support device and the tunnel to reduce damage and cracking of the contact surface, and is used to solve the problem of increased probability of roof collapse on the contact surface due to hard contact.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: a coal mine excavation support device, comprising a support base, a pad is provided on the top of the support base, a telescopic device is fixedly installed on the top of the pad, a support device is fixedly installed on the top of the telescopic device, a connecting shaft seat I is fixedly installed on the top of the pad in front of the telescopic device, a top movable sleeve of the connecting shaft seat I is provided with an unfolding device, the top of the unfolding device cooperates with the support device, the outer surface of the telescopic device is respectively connected with the support device and the unfolding device through a pipe, and an anti-slip strip is provided on the bottom of the support base, the anti-slip strip is distributed in a linear array, the anti-slip strip is in contact with the channel ground and plays an anti-slip role.

[0005] Furthermore, the telescopic device includes a hydraulic press and a piston rod, a liquid storage tank is provided on the top of the piston rod, and liquid is injected into the liquid storage tank.

[0006] Specifically, a limit block is fixedly installed on the front side of the liquid storage bin near the top, and the limit block limits the telescopic rod circumferentially to prevent the telescopic rod from rotating. A limit rod is fixedly installed on the bottom of the inner cavity of the liquid storage bin, and the limit block and the limit rod limit the up and down movement of the telescopic rod.

[0007] Specifically, a telescopic rod is movably sleeved on the outer surface of the limiting rod, and a slide groove is provided on the front side of the outer surface of the telescopic rod. The slide groove cooperates with the limiting block, and the slide groove allows water to pass through and be discharged from the drain pipe outlet.

[0008] Specifically, a mounting pad is fixedly installed on the top of the telescopic rod, and a supporting device is fixedly installed on the top of the mounting pad by bolt connection. An energy storage spring is clamped at a position outside the limit rod at the bottom of the liquid storage tank, and the elastic force stored in the energy storage spring itself can drive the telescopic rod to reset.

[0009] Specifically, the top of the energy storage spring is clamped with the bottom of the telescopic rod, and a discharge pipe opening is provided on the outer surface of the piston rod below the limit block. The discharge pipe opening is connected to the inner cavity of the piston rod. There are two discharge pipe openings. When the telescopic rod squeezes the cavity inside the liquid storage bin, the liquid inside the liquid storage bin is discharged through the discharge pipe opening under the action of squeezing.

[0010] Furthermore, the supporting device includes a connecting seat, which is fixedly installed on the top of the mounting pad. A limiting side plate I is fixedly installed on the top of the connecting seat near both sides. The limiting side plate I limits both sides of the expansion bag I to prevent the expansion bag I from expanding in both directions when the hydraulic pressure inside the expansion bag I increases.

[0011] Specifically, an expansion bag I is provided at the top of the connection seat between the limiting side plates I. When the hydraulic pressure inside the expansion bag I increases, the volume increases and comes into close contact with the top of the tunnel.

[0012] Specifically, a scratch-proof cover I is provided on the top of the connection seat, and two ends of the scratch-proof cover I are respectively fixedly connected to the outer sides of the limiting side plate I.

[0013] Specifically, the anti-scratch sleeve I is made of wear-resistant nylon material, and the expansion bag I is made of high-pressure resistant rubber material, which serves to separate the top of the tunnel from the top of the expansion bag I to prevent the expansion bag I from being damaged due to excessive friction.

[0014] Specifically, the anti-scratch cover I contacts the top of the expansion bag I and limits the expansion bag I to the area between the limiting side plates I.

[0015] Specifically, connecting plates are fixedly installed on both sides of the outer surface of the connecting seat near the front end, the front end movable sleeve of the connecting plate is provided with a rotating plate, the top of the rotating plate is provided with a limiting side plate II, an expansion bag II and an anti-scratch cover II, the structure and function of the limiting side plate II, the expansion bag II and the anti-scratch cover II are the same as the structure and function of the limiting side plate I, the expansion bag I and the anti-scratch cover I, and a guide frame is provided at the bottom of the rotating plate, and the guide frame is connected to the unfolding device.

[0016] Specifically, a liquid guide pipe port and a connecting pipe port I are respectively provided at positions near both ends of the bottom of the connecting seat, and both the liquid guide pipe port and the connecting pipe port I are connected to the interior of the expansion bag I. A connecting pipe port II is provided at a position near the guide frame at the bottom of the rotating plate, and the connecting pipe port II is connected to the inner cavity of the expansion bag II.

[0017] Specifically, the connecting pipe opening I is connected to the connecting pipe opening II through a pipeline.

[0018] Furthermore, the unfolding device includes a rotating seat, and a rotating shaft is fixedly installed on the bottom of both sides of the outer surface of the rotating seat. The rotating shaft is sleeved with the connecting shaft seat I. A hydraulic warehouse is opened on the top of the rotating seat, and a travel device is provided in the internal movable sleeve of the hydraulic warehouse. A push plate is provided in the top movable sleeve of the travel device. The push plate is initially in an inclined state, so that the center of the overall unfolding device is biased to one side.

[0019] Specifically, sliding shafts are fixedly installed on both sides of the push plate near the top, and the sliding shafts are slidably matched with the guide frame. A liquid inlet is provided on the right side of the outer surface of the rotating seat near the bottom, and the liquid inlet is connected with the inner cavity of the hydraulic warehouse. A side warehouse is opened on the back of the inner wall of the hydraulic warehouse, and a locking device is fixedly installed on the back of the side warehouse. An unlocking rod is movably installed on the front side of the rotating seat near the bottom.

[0020] Specifically, the liquid discharge pipe opening is connected to the liquid guide pipe opening and the liquid inlet pipe opening through pipelines respectively.

[0021] Furthermore, the stroke device includes an outer stroke tube and an inner stroke tube, and the inner stroke tube is movably installed inside the outer stroke tube by telescopic cooperation. When the hydraulic pressure inside the hydraulic chamber increases, the outer stroke tube extends from the inside of the hydraulic chamber, and the inner stroke tube extends from the inside of the outer stroke tube.

[0022] Specifically, a limited base is provided at the bottom of the outer surface of the outer stroke tube, a connecting shaft seat II is fixedly installed on the top of the inner stroke tube, the connecting shaft seat II is movably sleeved with the push plate, and liquid grooves are provided on the front and both sides of the limited base to ensure that the liquid can flow.

[0023] Specifically, travel teeth are arranged on the back side of the limiting base.

[0024] Furthermore, the locking device includes a travel plate and a limiting sliding rod, and the end of the unlocking rod is in contact with the travel plate, and pressing the unlocking rod will cause displacement of the travel plate.

[0025] Specifically, when the pressure inside the hydraulic chamber increases, the stroke plate will move toward the inside of the side chamber under the action of the hydraulic pressure, so that the locking teeth are out of contact with the stroke teeth to prevent the outer stroke tube from being blocked from extending.

[0026] Specifically, a locking tooth is provided on the front side of the stroke plate near the middle, and the locking tooth is used to lock with the stroke tooth to realize the stopping of the external stroke tube.

[0027] Specifically, the locking teeth are distributed in a linear array, the number of the limit slide bars is 100 and they are movably mounted with the travel plate, a return spring is clamped on the back of the travel plate at a position outside the limit slide bar, and a flow hole is opened on the front of the travel plate near the bottom, so that the liquid can pass through at a slow speed, and finally the hydraulic pressure on both sides of the travel plate is balanced, and the travel plate is reset under the action of the return spring force, so that the locking tooth contacts and locks with the travel tooth.

[0028] Specifically, further, the limit slide rod includes a main slide rod, and a stop tail rod is fixedly installed at the tail end of the main slide rod to achieve a stop effect on the stroke plate, preventing the stroke plate from contacting the back of the side bin and causing the liquid to be unable to flow through the circulation hole.

[0029] Specifically, an anti-slip head is fixedly mounted on the front end of the main sliding rod.

[0030] Specifically, the cross-sectional diameter of the main sliding rod is smaller than the cross-sectional diameter of the stop tail rod, the anti-slip head is truncated cone-shaped, and the anti-slip head is sleeved with the travel plate in an initial state to prevent the travel plate from falling off.

[0031] This application has the following beneficial effects:

[0032] The pressure generated by the support is used to drive the liquid to be injected into the expansion bladder I and the expansion bladder II to achieve expansion and contact with the top of the tunnel. The contact surface between the support device and the tunnel achieves soft contact, and the force of the support can be evenly distributed on the entire contact surface, thereby effectively reducing the pressure and avoiding the uneven tunnel surface causing excessive local pressure and cracking and breaking of the contact surface, thereby causing roof collapse. Anti-scratch sleeves I and II are used to separate the contact surfaces between the expansion bladders I and II and the tunnel to avoid sharp protrusions on the tunnel surface that scratch the expansion bladders I and II and cause liquid leakage. In addition, the operator can judge the force of the support by observing the degree of expansion of the expansion bladders I and II, which is more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings, which constitute a part of the specification, illustrate embodiments disclosed in the present application and, together with the description, serve to explain the principles disclosed in the present application.

[0034] The present disclosure may be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:

[0035] Figure 1 It is a structural diagram of the present invention;

[0036] Figure 2 It is a cross-sectional view of the structure of the present invention;

[0037] Figure 3 This is a diagram of the structural telescopic device of the present invention;

[0038] Figure 4 It is a cross-sectional view of the structural telescopic device of the present invention;

[0039] Figure 5 This is a diagram of the structural support device of the present invention;

[0040] Figure 6 for Figure 5 Side view of

[0041] Figure 7 It is a cross-sectional view of the structural support device of the present invention;

[0042] Figure 8 The structure of the present invention Figure 7 The enlarged schematic diagram at A in the middle;

[0043] Fig. 9 It is a diagram of the structure of the present invention;

[0044] Fig.10 It is a cross-sectional view of the structure of the present invention;

[0045] Fig.11 It is a structural stroke device diagram of the present invention;

[0046] Fig.12 It is a cross-sectional view of the structural stroke device of the present invention;

[0047] Fig.13 This is a diagram of the structural locking device of the present invention;

[0048] Fig.14 The structure of the present invention Fig.13 The enlarged schematic diagram of point B in the middle;

[0049] Fig.15 This is a diagram of the position-limiting sliding rod structure of the present invention.

[0050] In the figure; 1, support base; 2, pad; 3, telescopic device; 31, hydraulic press; 32, piston rod; 33, liquid storage tank; 34, limit block; 35, limit rod; 36, telescopic rod; 37, slide; 38, installation pad; 39, energy storage spring; 301, discharge pipe outlet; 4, support device; 41, connecting seat; 42, limit side plate Ⅰ; 43, expansion bag Ⅰ; 44, anti-scratch cover Ⅰ; 45, connecting plate; 46, rotating plate; 47, limit side plate Ⅱ; 48, expansion bag Ⅱ; 49, anti-scratch cover Ⅱ; 401, guide frame; 402, liquid guide pipe outlet; 403, connecting pipe outlet Ⅰ; 404, connecting pipe outlet Ⅱ; 5, Connecting shaft seat Ⅰ; 6. unfolding device; 61. rotating seat; 62. rotating shaft; 63. hydraulic chamber; 64. stroke device; 641. outer stroke tube; 642. inner stroke tube; 643. limit base; 644. connecting shaft seat Ⅱ; 645. liquid trough; 646. stroke tooth; 65. push plate; 66. sliding shaft; 67. liquid inlet; 68. side chamber; 69. locking device; 691. stroke plate; 692. limit slide rod; 6921. main slide rod; 6922. stop tail rod; 6923. anti-slip head; 693. locking tooth; 694. reset spring; 695. flow hole; 601. unlocking rod; 7. anti-slip strip. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0052] A coal mine excavation support device, please refer to Figure 1-Figure 2 , including a support base 1, a pad 2 is provided on the top of the support base 1, a telescopic device 3 is fixedly installed on the top of the pad 2, a support device 4 is fixedly installed on the top of the telescopic device 3, a connecting shaft seat Ⅰ5 is fixedly installed on the top of the pad 2 at a position in front of the telescopic device 3, and an expansion device 6 is provided on the top movable sleeve of the connecting shaft seat Ⅰ5, the top of the expansion device 6 cooperates with the support device 4, and the outer surfaces of the telescopic device 3 are respectively connected with the support device 4 and the expansion device 6 through pipes, and an anti-slip strip 7 is provided on the bottom of the support base 1, and the anti-slip strip 7 is distributed in a linear array. The anti-slip strip 7 is in contact with the ground of the channel and plays an anti-slip role.

[0053] See also Figure 3-Figure 4 The telescopic device 3 includes a hydraulic machine 31 and a piston rod 32. A liquid storage tank 33 is provided on the top of the piston rod 32, and liquid is injected into the liquid storage tank 33.

[0054] See also Figure 3-Figure 4A limit block 34 is fixedly installed on the front side of the liquid storage bin 33 near the top, and the limit block 34 limits the telescopic rod 36 circumferentially to prevent the telescopic rod 36 from rotating. A limit rod 35 is fixedly installed on the bottom of the inner cavity of the liquid storage bin 33, and the limit block 34 and the limit rod 35 limit the up and down movement of the telescopic rod 36.

[0055] See also Figure 3-Figure 4 The outer surface of the limiting rod 35 is movably sleeved with a telescopic rod 36, and the front side of the outer surface of the telescopic rod 36 is provided with a slide groove 37, which cooperates with the limiting block 34, and the slide groove 37 allows water to pass through and be discharged from the drain pipe port 301.

[0056] See also Figure 3-Figure 4 A mounting pad 38 is fixedly installed on the top of the telescopic rod 36, and a supporting device 4 is fixedly installed on the top of the mounting pad 38 by bolt connection. An energy storage spring 39 is clamped at a position outside the limit rod 35 at the bottom of the liquid storage tank 33, and the elastic force stored in the energy storage spring 39 can drive the telescopic rod 36 to reset.

[0057] See also Figure 3-Figure 4 The top of the energy storage spring 39 is clamped with the bottom of the telescopic rod 36, and a discharge pipe port 301 is provided on the outer surface of the piston rod 32 below the limit block 34. The discharge pipe port 301 is connected to the inner cavity of the piston rod 32. There are two discharge pipe ports 301. When the telescopic rod 36 squeezes the cavity inside the liquid storage bin 33, the liquid inside the liquid storage bin 33 is discharged through the discharge pipe port 301 under the action of squeezing.

[0058] See also Figure 3-Figure 8 The supporting device 4 includes a connecting seat 41, which is fixedly installed on the top of the mounting pad 38. A limiting side plate Ⅰ42 is fixedly installed on the top of the connecting seat 41 near both sides. The limiting side plate Ⅰ42 limits both sides of the expansion bag Ⅰ43 to prevent the expansion bag Ⅰ43 from expanding in both directions when the hydraulic pressure inside the expansion bag Ⅰ43 is increased.

[0059] See also Figure 5-Figure 8 An expansion bag Ⅰ43 is arranged at the top of the connecting seat 41 between the limiting side plates Ⅰ42. When the hydraulic pressure inside the expansion bag Ⅰ43 increases, the volume increases and is in close contact with the top of the tunnel. The anti-scratch sleeve Ⅰ44 can prevent the expansion bag Ⅰ43 from directly contacting the top of the tunnel. Since there will be many sharp protrusions on the top of the tunnel after excavation, the anti-scratch sleeve Ⅰ44 can effectively prevent the expansion bag Ⅰ43 from being scratched by the sharp protrusions on the top of the tunnel, thereby improving the stability of the device during operation.

[0060] See also Figure 5-Figure 8During the support process, the operator can judge the force exerted by the device on the contact part of the tunnel by observing the expansion state of the expansion bag Ⅰ43. The larger the volume amplitude of the expansion bag Ⅰ43, the greater the force exerted by the device on the contact part of the tunnel; the smaller the volume amplitude of the expansion bag Ⅰ43, the smaller the force exerted by the device on the contact part of the tunnel. This enables the operator to control the support force more accurately. Since the traditional device adopts rigid contact to achieve the support effect, the operator cannot intuitively feel the support force. The device involved in the present application document avoids this problem well, thereby improving the reliability of the device.

[0061] See also Figure 5-Figure 8 A scratch-proof cover Ⅰ44 is provided on the top of the connecting seat 41 , and both ends of the scratch-proof cover Ⅰ44 are fixedly connected to the outer sides of the limiting side plates Ⅰ42 .

[0062] See also Figure 5-Figure 8 The material of the anti-scratch sleeve Ⅰ44 is wear-resistant nylon material, and the material of the expansion bag Ⅰ43 is high-pressure resistant rubber material, which plays the role of separating the top of the tunnel from the top of the expansion bag Ⅰ43 to prevent the expansion bag Ⅰ43 from being damaged due to excessive friction.

[0063] See also Figure 5-Figure 8 The anti-scratch cover Ⅰ44 contacts the top of the expansion bag Ⅰ43 and limits the expansion bag Ⅰ43 to the area between the limiting side plates Ⅰ42.

[0064] See also Figure 2 and Figure 5-Figure 8 A connecting plate 45 is fixedly installed on both sides of the outer surface of the connecting seat 41 near the front end, and a rotating plate 46 is provided on the front end movable sleeve of the connecting plate 45. A limiting side plate Ⅱ47, an expansion bag Ⅱ48 and an anti-scratch cover Ⅱ49 are arranged on the top of the rotating plate 46. The structure and function of the limiting side plate Ⅱ47, the expansion bag Ⅱ48 and the anti-scratch cover Ⅱ49 are the same as the structure and function of the limiting side plate Ⅰ42, the expansion bag Ⅰ43 and the anti-scratch cover Ⅰ44. A guide frame 401 is arranged at the bottom of the rotating plate 46, and the guide frame 401 is connected to the unfolding device 6. When the device is in the initial state, the unfolding device 6 and the rotating plate 46 can be in a vertical state, which makes the device occupy less space when stored. Under the premise of a certain storage space, more support devices can be stored, thereby reducing the storage cost of the device.

[0065] See also Figure 5-Figure 8 A liquid guide tube port 402 and a connecting tube port I 403 are respectively provided at positions near both ends of the bottom of the connecting seat 41, and both the liquid guide tube port 402 and the connecting tube port I 403 are connected to the interior of the expansion bag I 43. A connecting tube port II 404 is provided at a position near the guide frame 401 at the bottom of the rotating plate 46, and the connecting tube port II 404 is connected to the inner cavity of the expansion bag II 48.

[0066] See also Figure 2 , Figure 4 and Figure 5-Figure 8 , the connecting pipe port Ⅰ403 is connected to the connecting pipe port Ⅱ404 through a pipeline. When the operator controls the hydraulic press 31 to drive the piston rod 32 to extend, the top of the support device 4 will first contact the top of the tunnel, and the blocked support device 4 drives the telescopic rod 36 to retract into the liquid storage bin 33. In this process, the telescopic rod 36 squeezes the inside of the liquid storage bin 33 and increases the hydraulic pressure. The liquid is discharged through the discharge pipe port 301 and enters the expansion bag Ⅰ43 through the pipeline and the liquid guide pipe port 402. The hydraulic pressure inside the expansion bag Ⅰ43 increases. Under this action, the volume of the expansion bag Ⅰ43 expands. Under the limit of the limit side plate Ⅰ42, the expansion bag Ⅰ43 will expand upward and contact the top of the tunnel. Since the material of the expansion bag Ⅰ43 is a high-pressure resistant rubber material, the surface of the expansion bag Ⅰ43 can be closely fitted with the top of the tunnel, avoiding the problem of cracks in the top structure of the tunnel caused by the huge force caused by rigid contact, resulting in roof caving or collapse, thereby improving the safety performance of the device.

[0067] See also Figure 2 and Figure 9-10 The unfolding device 6 includes a rotating seat 61, and rotating shafts 62 are fixedly installed on the bottom of both sides of the outer surface of the rotating seat 61. The rotating shafts 62 are sleeved with the connecting shaft seat Ⅰ5. A hydraulic warehouse 63 is opened on the top of the rotating seat 61. The internal movable sleeve of the hydraulic warehouse 63 is provided with a stroke device 64. The top movable sleeve of the stroke device 64 is provided with a push plate 65. The push plate 65 is initially in a tilted state, so that the center of the unfolding device 6 as a whole is biased to one side.

[0068] See also Figure 5-Figure 8 A sliding shaft 66 is fixedly installed on both sides of the push plate 65 near the top, and the sliding shaft 66 is slidably matched with the guide frame 401. A liquid inlet pipe port 67 is provided on the right side of the outer surface of the rotating seat 61 near the bottom. The liquid inlet pipe port 67 is connected to the inner cavity of the hydraulic warehouse 63. A side warehouse 68 is provided on the back of the inner wall of the hydraulic warehouse 63. A locking device 69 is fixedly installed on the back of the side warehouse 68. An unlocking rod 601 is movably installed on the front side of the rotating seat 61 near the bottom.

[0069] See also Figure 4 , Figure 6 and Fig. 9 The liquid discharge pipe opening 301 is connected to the liquid guide pipe opening 402 and the liquid inlet pipe opening 67 through pipelines respectively.

[0070] See also Figure 3-Figure 12, the stroke device 64 includes an outer stroke tube 641 and an inner stroke tube 642. The inner stroke tube 642 is movably installed inside the outer stroke tube 641 in a telescopic fit manner. When the hydraulic pressure inside the hydraulic chamber 63 increases, the outer stroke tube 641 extends out from the inside of the hydraulic chamber 63, and the inner stroke tube 642 extends out from the inside of the outer stroke tube 641. When the hydraulic pressure inside the liquid storage chamber 33 increases, the liquid discharge pipe orifice 301 will simultaneously convey the liquid through the pipeline and the liquid inlet pipe orifice 67 into the inside of the hydraulic chamber 63, causing the pressure inside the hydraulic chamber 63 to increase and pushing the inner stroke tube 642 and the outer stroke tube 641 to extend out from the inside of the hydraulic chamber 63. Since the push plate 65 is biased to one side, the center of the entire deployment device 6 is also biased to one side. When the outer stroke tube 641 and the inner stroke tube 642 are output, the entire deployment device 6 will deflect to one side. At the same time, through the sliding fit of the sliding shaft 66 with the guide frame 401, the rotating plate 46 is driven to rotate to a horizontal state. At this time, the communication pipe orifice I 403 is connected to the communication pipe orifice II 404 through a pipeline, enabling the liquid to enter the inside of the expansion bladder II 48 through the communication pipe orifice I 403 and the communication pipe orifice II 404. The expansion bladder II 48 expands by the same principle and achieves the effect of contacting the top of the roadway, thereby increasing the contact area between the device and the top of the roadway and ensuring the stability of the support of the device.

[0071] Please refer to Figure 11-Figure 12 , a limit base 643 is provided at the bottom of the outer surface of the outer stroke tube 641. A connecting shaft seat II 644 is fixedly installed at the top of the inner stroke tube 642. The connecting shaft seat II 644 is movably sleeved with the push plate 65. Liquid through grooves 645 are provided at the front and both sides of the limit base 643, and the liquid through grooves 645 ensure the flow of liquid.

[0072] Please refer to Figure 11-Figure 12 , a stroke tooth 646 is provided on the back of the limit base 643.

[0073] Please refer to Fig.10 and Fig.13 , the locking device 69 includes a stroke plate 691 and a limit slide bar 692. The end of the unlocking rod 601 contacts the stroke plate 691, and pressing the unlocking rod 601 will cause displacement of the stroke plate 691.

[0074] Please refer to Fig.10 and Figure 12-13 , when the pressure inside the hydraulic chamber 63 increases, the stroke plate 691 will move towards the inside of the side chamber 68 under the action of the hydraulic pressure, causing the locking tooth 693 to disengage from the stroke tooth 646 to prevent hindering the extension of the outer stroke tube 641.

[0075] Please refer to Fig.10 and Fig.12A locking tooth 693 is provided on the front side of the stroke plate 691 near the middle, and the locking tooth 693 is used to lock with the stroke tooth 646 to achieve the stop of the external stroke tube 641.

[0076] See also Fig.10 and Figure 12-14 The locking teeth 693 are distributed in a linear array, the number of limit slide bars 692 is reserved and they are movably sleeved with the stroke plate 691, a return spring 694 is clamped on the back of the stroke plate 691 at a position outside the limit slide bar 692, and a flow hole 695 is opened on the front of the stroke plate 691 near the bottom, so that the liquid can pass through at a slow speed, and finally the hydraulic pressure on both sides of the stroke plate 691 is balanced. The stroke plate 691 is reset under the action of the elastic force of the return spring 694, so that the locking teeth 693 are in contact with the stroke teeth 646 and locked. When the hydraulic pressure inside the hydraulic chamber 63 increases, the stroke plate 691 moves toward the inside of the side chamber 68 under the action of pressure, so that the locking teeth 693 are out of contact with the stroke teeth 646, ensuring that the outer stroke tube 641 and the inner stroke tube 642 are in the process of extending. 646 avoids the problem that the outer stroke tube 641 and the inner stroke tube 642 cannot be extended normally due to being locked due to being in contact with the locking tooth 693. Since a flow hole 695 is provided at the bottom of the stroke plate 691, the liquid inside the hydraulic chamber 63 will flow to the inside of the side chamber 68 through the flow hole 695 under the action of pressure. After a period of time, the pressure on both sides of the stroke plate 691 is balanced. At this time, the elastic force of the reset spring 694 will drive the stroke plate 691 to reset, so that the locking tooth 693 contacts with the stroke tooth 646 again and achieves the locking effect. At this time, the support device 4 has achieved the supporting effect on the tunnel, so that the device automatically achieves the locking effect on the unfolding device 6 after completing the support, and the hydraulic press 31 and the piston rod 32 do not need to be in working state for a long time, thereby improving the reliability of the device.

[0077] See also Figure 4 , Figure 7-Figure 8 , Fig.10 , Figure 12-14When the use is finished, the operator controls the hydraulic press 31 and the piston rod 32 to retract. During the retraction of the piston rod 32, the elastic force of the energy storage spring 39 drives the telescopic rod 36 to reset. The telescopic rod 36 retracts from the inside of the liquid storage tank 33, so that the volume of the cavity inside the liquid storage tank 33 increases and the pressure decreases, so that the liquid inside the expansion bag I 43 and the expansion bag II 48 flows back to the inside of the liquid storage tank 33. At the same time, the liquid inside the hydraulic tank 63 also flows back to the inside of the liquid storage tank 33. During the reflux process, since the travel tooth 646 and the locking tooth 693 are still in contact and locked state, the rotating plate 4 6 will not fall down immediately under the action of gravity, so as to avoid the occurrence of safety accidents caused by the sudden fall of the rotating plate 46 and the concentration of operators, thereby improving the safety of the device. As the liquid inside the hydraulic chamber 63 is pumped back to the inside of the liquid storage chamber 33 through the liquid inlet pipe 67, the liquid inside the side chamber 68 is also pumped back to the inside of the hydraulic chamber 63 through the flow hole 695. At this time, the operator can press the unlocking rod 601 to squeeze the stroke plate 691 to move toward the inside of the side chamber 68, thereby releasing the contact locking state of the locking tooth 693 and the stroke tooth 646, and the device is restored to the initial state.

[0078] See also Figure 13-Figure 15 The limit slide bar 692 includes a main slide bar 6921, and a stop tail bar 6922 is fixedly installed at the tail end of the main slide bar 6921 to achieve a stop effect on the stroke plate 691, preventing the stroke plate 691 from contacting the back of the side bin 68 and causing the liquid to be unable to flow through the circulation hole 695.

[0079] See also Fig.15 An anti-slip head 6923 is fixedly installed at the front end of the main sliding rod 6921.

[0080] See also Figure 13-Figure 15 The cross-sectional diameter of the main slide bar 6921 is smaller than the cross-sectional diameter of the stop tail bar 6922, and the anti-slip head 6923 is truncated cone-shaped. In the initial state, the anti-slip head 6923 is sleeved with the travel plate 691 to prevent the travel plate 691 from falling off.

[0081] The method of use of the present invention is as follows:

[0082] When the device is in the initial state, the unfolding device 6 and the rotating plate 46 can be in a vertical state, which makes the device occupy a smaller space when stored. Under the premise of a certain storage space, more supporting devices can be stored.

[0083] During use, when the operator controls the hydraulic press 31 to drive the piston rod 32 to extend, the top of the support device 4 will first contact the top of the tunnel, and the blocked support device 4 will drive the telescopic rod 36 to retract into the liquid storage bin 33. During this process, the telescopic rod 36 squeezes the inside of the liquid storage bin 33 and increases the hydraulic pressure. The liquid is discharged through the discharge pipe port 301 and enters the inside of the expansion bag Ⅰ43 through the pipeline and the liquid guide pipe port 402. The hydraulic pressure inside the expansion bag Ⅰ43 increases, and under this action, the volume of the expansion bag Ⅰ43 expands. Under the limit of the limit side plate Ⅰ42, the expansion bag Ⅰ43 will expand upward and contact the top of the tunnel. Since the material of the expansion bag Ⅰ43 is a high-pressure resistant rubber material, the surface of the expansion bag Ⅰ43 can contact the top of the tunnel. The top of the tunnel is tightly fitted, and the anti-scratch sleeve Ⅰ44 can prevent the expansion bag Ⅰ43 from directly contacting the top of the tunnel. Since there will be many sharp protrusions on the top of the tunnel after excavation, the anti-scratch sleeve Ⅰ44 can effectively prevent the expansion bag Ⅰ43 from being scratched by the sharp protrusions on the top of the tunnel. When the hydraulic pressure inside the liquid storage tank 33 increases, the discharge pipe port 301 will simultaneously transport the liquid to the inside of the hydraulic tank 63 through the pipeline and the liquid inlet pipe port 67, so that the pressure inside the hydraulic tank 63 increases, and pushes the inner stroke tube 642 and the outer stroke tube 641 to extend out from the inside of the hydraulic tank 63. Since the push plate 65 is biased to one side, the center of the deployment device 6 is also biased to one side, so that the outer stroke tube 641 and the inner stroke tube 642 are in the process of output. The deployment device 6 The whole body will deflect to one side, and at the same time, it will slide with the guide frame 401 through the sliding shaft 66, thereby driving the rotating plate 46 to rotate to a horizontal state. At this time, the connecting pipe port Ⅰ403 is connected to the connecting pipe port Ⅱ404 through a pipeline, so that the liquid can enter the interior of the expansion bag Ⅱ48 through the connecting pipe port Ⅰ403 and the connecting pipe port Ⅱ404. The expansion bag Ⅱ48 expands through the same principle and achieves the effect of contacting with the top of the lane, thereby increasing the contact area between the device and the top of the lane. When the hydraulic pressure inside the hydraulic chamber 63 increases, the stroke plate 691 moves toward the inside of the side chamber 68 under the action of pressure, so that the locking tooth 693 is out of contact with the stroke tooth 646, ensuring that the outer stroke tube 641 and the inner stroke tube 642 are in contact with each other during the extension process. During the process, the travel tooth 646 is prevented from being in contact with the locking tooth 693, resulting in locking and causing the outer travel tube 641 and the inner travel tube 642 to be unable to extend normally. Since the bottom of the travel plate 691 is provided with a flow hole 695, the liquid inside the hydraulic chamber 63 will flow to the inside of the side chamber 68 through the flow hole 695 under the action of pressure. After a period of time, the pressure on both sides of the travel plate 691 is balanced. At this time, the elastic force of the reset spring 694 will drive the travel plate 691 to reset, so that the locking tooth 693 contacts the travel tooth 646 again and achieves the locking effect. At this time, the support device 4 has achieved the supporting effect on the tunnel, so that the device automatically achieves the locking effect on the unfolding device 6 after completing the support. During the support process, the deviceThe operator can judge the force of the device on the contact part of the tunnel by observing the expansion state of the expansion capsule I 43. The larger the volume of the expansion capsule I 43, the greater the force of the device on the contact part of the tunnel. The smaller the volume of the expansion capsule I 43, the smaller the force of the device on the contact part of the tunnel. Therefore, the operator can control the support force more accurately.

[0084] After use, the operator controls the hydraulic press 31 and the piston rod 32 to retract. During the retraction of the piston rod 32, the elastic force of the energy storage spring 39 drives the telescopic rod 36 to reset, and the telescopic rod 36 retracts from the inside of the liquid storage tank 33, so that the volume of the cavity inside the liquid storage tank 33 increases and the pressure decreases, so that the liquid inside the expansion bag I 43 and the expansion bag II 48 flows back to the inside of the liquid storage tank 33, and the liquid inside the hydraulic tank 63 also flows back to the inside of the liquid storage tank 33. During the reflux process, since the travel tooth 646 and the locking tooth 693 are still in contact and locked state, the rotating plate 4 6 will not fall down immediately under the action of gravity, so as to avoid the occurrence of safety accidents caused by the sudden fall of the rotating plate 46 and the concentration of operators, thereby improving the safety of the device. As the liquid inside the hydraulic chamber 63 is pumped back to the inside of the liquid storage chamber 33 through the liquid inlet pipe 67, the liquid inside the side chamber 68 is also pumped back to the inside of the hydraulic chamber 63 through the flow hole 695. At this time, the operator can press the unlocking rod 601 to squeeze the stroke plate 691 to move toward the inside of the side chamber 68, thereby releasing the contact locking state of the locking tooth 693 and the stroke tooth 646, and the device is restored to the initial state.

Claims

1. A coal mine excavation support device, characterized in that: The invention comprises a support base (1), a pad (2) is arranged on the top of the support base (1), a telescopic device (3) is fixedly installed on the top of the pad (2), a support device (4) is fixedly installed on the top of the telescopic device (3), a connecting shaft seat I (5) is fixedly installed on the top of the pad (2) at a position in front of the telescopic device (3), a top movable sleeve of the connecting shaft seat I (5) is provided with an unfolding device (6), the top of the unfolding device (6) is matched with the support device (4), and the outer surface of the telescopic device (3) is respectively connected to the support device (4) and the unfolding device (6) through a pipeline. The support base (1) is connected to the support base, and the bottom of the support base (1) is provided with an anti-slip strip (7), and the anti-slip strip (7) is distributed in a linear array; the telescopic device (3) comprises a hydraulic press (31) and a piston rod (32), the top of the piston rod (32) is provided with a liquid storage bin (33), a limit block (34) is fixedly installed at a position close to the top of the front side of the liquid storage bin (33), a limit rod (35) is fixedly installed at the bottom of the inner cavity of the liquid storage bin (33), the outer surface of the limit rod (35) is movably sleeved with a telescopic rod (36), and the front side of the outer surface of the telescopic rod (36) is provided with a slide groove (37) ), the slide groove (37) cooperates with the limit block (34), a mounting pad (38) is fixedly installed on the top of the telescopic rod (36), and a supporting device (4) is fixedly installed on the top of the mounting pad (38) by bolt connection, the bottom of the liquid storage tank (33) is clamped with an energy storage spring (39) at a position outside the limit rod (35), and the top of the energy storage spring (39) is clamped with the bottom of the telescopic rod (36), and a liquid discharge pipe opening (301) is provided on the outer surface of the piston rod (32) at a position below the limit block (34), and the liquid discharge pipe opening (301) is connected to the piston rod ( 32), the number of the liquid discharge pipe openings (301) is two; the supporting device (4) comprises a connecting seat (41), the connecting seat (41) is fixedly mounted on the top of the mounting pad (38), a limiting side plate I (42) is fixedly mounted on the top of the connecting seat (41) near the two sides, an expansion bag I (43) is arranged at the top of the connecting seat (41) between the limiting side plates I (42), an anti-scratch cover I (44) is arranged on the top of the connecting seat (41), and the two ends of the anti-scratch cover I (44) are respectively fixedly connected to the outer side of the limiting side plate I (42); The material of the anti-scratch cover I (44) is wear-resistant nylon material, and the material of the expansion bag I (43) is high-pressure resistant rubber material; The anti-scratch cover I (44) contacts the top of the expansion bag I (43) and restricts the expansion bag I (43) within the area between the limiting side plates I (42); Connecting plates (45) are fixedly mounted on both sides of the outer surface of the connecting seat (41) near the front end, and a rotating plate (46) is provided on the front end of the connecting plate (45). A limiting side plate II (47), an expansion bag II (48) and an anti-scratch cover II (49) are provided on the top of the rotating plate (46). The structures of the limiting side plate II (47), the expansion bag II (48) and the anti-scratch cover II (49) are the same as those of the limiting side plate I (42), the expansion bag I (43) and the anti-scratch cover I (44). A guiding frame (401) is provided on the bottom of the rotating plate (46), and the guiding frame (401) is connected to the unfolding device (6); A liquid guide tube port (402) and a connecting tube port I (403) are respectively arranged at positions near both ends of the bottom of the connecting seat (41), and the liquid guide tube port (402) and the connecting tube port I (403) are both connected to the interior of the expansion bag I (43); a connecting tube port II (404) is arranged at a position near the guide frame (401) at the bottom of the rotating plate (46), and the connecting tube port II (404) is connected to the inner cavity of the expansion bag II (48); The connecting pipe port I (403) is connected to the connecting pipe port II (404) through a pipeline.

2. A coal mine excavation support device according to claim 1, characterized in that: The unfolding device (6) comprises a rotating seat (61), and rotating shafts (62) are fixedly installed at the bottom of both sides of the outer surface of the rotating seat (61), and the rotating shafts (62) are sleeved with the connecting shaft seat I (5). A hydraulic chamber (63) is opened on the top of the rotating seat (61), and a travel device (64) is sleeved inside the hydraulic chamber (63). The top of the travel device (64) is sleeved with a push plate (65), and sliding plates are fixedly installed at positions near the top on both sides of the push plate (65). A shaft (66), the sliding shaft (66) is slidably matched with the guide frame (401), a liquid inlet pipe opening (67) is provided on the right side of the outer surface of the rotating seat (61) near the bottom, the liquid inlet pipe opening (67) is connected to the inner cavity of the hydraulic chamber (63), a side chamber (68) is provided on the back of the inner wall of the hydraulic chamber (63), a locking device (69) is fixedly installed on the back of the side chamber (68), and an unlocking lever (601) is movably installed on the front side of the rotating seat (61) near the bottom; The liquid discharge pipe opening (301) is connected to the liquid guide pipe opening (402) and the liquid inlet pipe opening (67) respectively through pipelines.

3. A coal mine excavation support device according to claim 2, characterized in that: The stroke device (64) comprises an outer stroke tube (641) and an inner stroke tube (642); the inner stroke tube (642) is movably mounted inside the outer stroke tube (641) by telescopic cooperation; a limit base (643) is provided at the bottom of the outer surface of the outer stroke tube (641); a connecting shaft seat II (644) is fixedly mounted on the top of the inner stroke tube (642); the connecting shaft seat II (644) is movably sleeved with the push plate (65); liquid passage grooves (645) are provided on the front and both sides of the limit base (643); and stroke teeth (646) are provided on the back of the limit base (643).

4. A coal mine excavation support device according to claim 3, characterized in that: The locking device (69) includes a travel plate (691) and a limiting slide bar (692), the end of the unlocking rod (601) contacts the travel plate (691), a locking tooth (693) is provided on the front side of the travel plate (691) near the middle, and the locking teeth (693) are distributed in a linear array. The limiting slide bars (692) are provided in number and are movably sleeved with the travel plate (691), a return spring (694) is clamped on the back side of the travel plate (691) at a position outside the limiting slide bar (692), and a flow hole (695) is provided on the front side of the travel plate (691) near the bottom.

5. A coal mine excavation support device according to claim 4, characterized in that: The limit slide bar (692) comprises a main slide bar (6921), a stop tail bar (6922) is fixedly mounted on the tail end of the main slide bar (6921), and an anti-slip head (6923) is fixedly mounted on the front end of the main slide bar (6921); The cross-sectional diameter of the main sliding rod (6921) is smaller than the cross-sectional diameter of the stop tail rod (6922), the anti-slip head (6923) is truncated cone-shaped, and the anti-slip head (6923) is sleeved with the travel plate (691) in an initial state.

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