An underground ventilation monitoring device

Abstract

The present invention discloses an underground ventilation monitoring device, comprising a locking mechanism and two dampers arranged opposite to each other, each damper being connected to a steel wire rope, the other end of the steel wire rope being connected to a gravity member, the locking mechanism also comprising a housing and a locking block movably arranged in the housing, the two gravity members being suspended in parallel in the housing, and further comprising a secondary locking rod movably connected in the housing, the secondary locking rod being located above the locking block, and during the ascent process, the gravity member squeezes the secondary locking rod after squeezing the locking block, so that the secondary locking rod limits the locking block. In the underground ventilation monitoring device provided by the present invention, during the ascent of the gravity member, the locking block is first squeezed to flip over, and then the flipped locking block is locked by the secondary locking rod, so that the locking block will not be affected by another gravity member that may rise, thereby reducing or even eliminating the probability of the locking block getting stuck in the gravity member.

Description

Technical Field

[0001] The present invention relates to underground ventilation technology, and in particular to an underground ventilation monitoring device. Background Art

[0002] As is well known, as an indispensable part of the underground ventilation monitoring system, in order to maintain mine safety, stabilize the ventilation system, and reduce ineffective air leakage, a damper mechanism needs to be installed in the underground tunnel. Due to the large pressure difference between the two sides of the damper mechanism, most damper mechanisms include two dampers. During normal use, the two dampers are staggered in opening and closing to ensure that the tunnel is not completely open at any point in time. To ensure this, the opening logic of the two dampers needs to be controlled. In theory, a software system can easily achieve this. However, due to the complexity of underground conditions and safety in extreme situations, the existing technology still uses a purely mechanical control mechanism in most cases.

[0003] For example, the patent with the authorization publication number CN213298029U and the authorization announcement date of May 28, 2021, and the name of "A mechanical locking device for a damper", includes a frame, pulley No. 1, wire rope No. 1, balance hammer No. 1, a locking triangle, damper No. 1, pulley No. 2, wire rope No. 2, balance hammer No. 2 and damper No. 2. The locking triangle is hinged on the frame, the pulley No. 1 is located at the left end inside the frame, and the wire rope No. 1 is movably wound around it, one end of the wire rope No. 1 is connected to the balance hammer No. 1, and the other end is connected to the damper No. 2. The pulley No. 2 is located at the right end inside the frame, and the wire rope No. 2 is movably wound around it, one end of the wire rope No. 2 is connected to the balance hammer No. 2, and the other end is connected to the damper No. 1.

[0004] Another example is the patent with authorization publication number CN213980846 U, which also provides a similar device. The disadvantage of this type of device is that the two areas separated by the damper mechanism often have a pressure difference. The above device pulls up a gravity member (the counterweight in the above patent) by opening one damper. The process of pulling up the gravity member drives a locking member (the locking triangle in the above patent) to rotate to limit the other gravity member, so that the other gravity member cannot be pulled up. Accordingly, the other damper cannot be opened. In actual operation, the following situation occurs: the original pressure difference in the roadway is borne by the two dampers. When one damper is opened, the pressure difference is instantly borne by the closed damper. The pressure causes the damper to have an opening tendency or even a smaller opening distance, so that the other gravity member directly presses against the locking member, and the other end of the locking member presses against the pulled gravity member. As a result, the pulled gravity member is suspended in the air due to the friction of the locking member and is stuck in the damper open position, which obviously affects normal operation. Summary of the Invention

[0005] The purpose of the present invention is to provide an underground ventilation monitoring device to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A downhole ventilation monitoring device includes a locking mechanism and two dampers arranged opposite to each other, each damper being connected to a steel wire rope, the other end of the steel wire rope being connected to a weight member, the locking mechanism also including a housing and a locking block movably disposed within the housing, the two weight members being suspended side by side within the housing, the opening of any damper driving the corresponding weight member to rise, thereby driving the locking block to move to limit the rising stroke of the other weight member, and further including:

[0008] A secondary locking rod is movably connected in the shell and is located above the locking block. During the rising process, the gravity member squeezes the secondary locking rod after squeezing the locking block, so that the secondary locking rod limits the locking block.

[0009] In the above-mentioned underground ventilation monitoring device, when the locking block limits the upward stroke of one of the gravity members, a gap is formed between it and the other gravity member.

[0010] In the above-mentioned underground ventilation monitoring device, the locking block is swingably connected in the shell, and the two ends of the swing stroke of the locking block are respectively located on the rising strokes of the two gravity members.

[0011] In the above-mentioned underground ventilation monitoring device, the locking block is an isosceles triangle block. After being driven up by a gravity member, the isosceles triangle block moves to the position of the other gravity member by relying on gravity.

[0012] In the above-mentioned underground ventilation monitoring device, the secondary locking rod is connected to the shell with its middle part swinging, and the rise of the gravity member drives one end of the secondary locking rod to rise so that the other end drops to limit the locking block.

[0013] In the above-mentioned underground ventilation monitoring device, the secondary locking rod relies on elastic force or gravity to achieve reset after the gravity member is separated.

[0014] In the above-mentioned underground ventilation monitoring device, the locking block reciprocates in the housing, and the two ends of the reciprocating stroke of the locking block are respectively located on the ascending strokes of the two gravity members.

[0015] In the above-mentioned underground ventilation monitoring device, a first wedge-shaped surface is provided at the end of the locking block, and a second wedge-shaped surface is provided at the top of the gravity member. During the rising process of the gravity member, the locking block is driven to reciprocate through the wedge-shaped cooperation of the first wedge-shaped surface and the second wedge-shaped surface.

[0016] In the above-mentioned underground ventilation monitoring device, the secondary locking rod includes a horizontal rod and a vertical rod. The middle portion of the horizontal rod is rotatably connected to the housing. One end of the horizontal rod is located on the rising stroke of the gravity member, and the other end of the horizontal rod presses the top of the vertical rod. The bottom of the vertical rod is located above the locking block.

[0017] The gravity piece rises and drives one end of the horizontal rod to rise and the other end to fall. The other end of the horizontal rod falls and squeezes the vertical rod to fall so that the bottom is inserted into the locking groove on the locking block.

[0018] In the above-mentioned underground ventilation monitoring device, a ball is provided on the top of the vertical rod, and the horizontal section is pressed on the ball.

[0019] In the above technical solution, the underground ventilation monitoring device provided by the present invention first squeezes the locking block to flip over during the rising stroke of the gravity piece, and then uses a secondary locking rod to lock the flipped locking block. In this way, the locking block will not be affected by another gravity piece that may rise, thereby reducing or even eliminating the probability of the locking block getting stuck in the gravity piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0021] Figure 1 A schematic structural diagram of a pipe clamp provided in one embodiment of the present invention;

[0022] Figure 2 A schematic structural diagram of an underground ventilation monitoring device provided by another embodiment of the present invention;

[0023] Figure 3 A schematic structural diagram of an underground ventilation monitoring device provided in yet another embodiment of the present invention;

[0024] Figure 4 A schematic structural diagram of an underground ventilation monitoring device provided in yet another embodiment of the present invention;

[0025] Figure 5 A schematic structural diagram of a secondary locking rod provided in yet another embodiment of the present invention;

[0026] Figure 6 A bottom view of a gravity member provided in yet another embodiment of the present invention;

[0027] Figure 7A schematic structural diagram of an underground ventilation monitoring device provided in yet another embodiment of the present invention;

[0028] Figure 8 A schematic structural diagram of an underground ventilation monitoring device provided in yet another embodiment of the present invention.

[0029] Description of reference numerals:

[0030] 1. Wire rope; 2. Gravity member; 2.1. Second wedge-shaped surface; 3. Housing; 4. Locking block; 4.1. First wedge-shaped surface; 4.2. Locking groove; 5. Secondary locking rod; 5.1. Horizontal rod; 5.2. Vertical rod; 5.3. First section; 5.4. Second section; 5.5. Limit rod; 6. Elastic sheet; 7. Connecting rope. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0032] like Figure 1-8 As shown, an embodiment of the present invention provides an underground ventilation monitoring device, including a locking mechanism and two relatively arranged air doors, each of the air doors is connected to a steel wire rope 1, and the other end of the steel wire rope 1 is connected to a gravity member 2. The locking mechanism also includes a shell 3 and a locking block 4 movably arranged in the shell 3. The two gravity members 2 are suspended in parallel in the shell 3. The opening of any air door drives the corresponding gravity member 2 to rise to drive the locking block 4 to move to limit the rising stroke of the other gravity member 2. It also includes a secondary locking rod 5, which is movably connected in the shell 3. The secondary locking rod 5 is located above the locking block 4. During the rising process, the gravity member 2 squeezes the secondary locking rod 5 after squeezing the locking block 4, so that the secondary locking rod 5 limits the locking block 4.

[0033] Specifically, two air doors are placed in the tunnel in front and back, and each air door is connected to a steel wire rope 1, and a gravity member 2 is hung on the other end of the steel wire rope 1. The steel wire rope 1 extends to the position between the two air doors, so that the two gravity members 2 are arranged side by side in the same shell 3. The opening and closing of each air door will drive the rise and fall of a gravity member 2. A locking block 4 is movably arranged in the shell 3. The most common one is an isosceles triangle connected to the shell 3 with its vertex rotating. The two ends of its movable stroke are respectively located on the rising stroke of the two gravity members 2, that is, the locking block 4 either blocks the rise of one gravity member 2 or blocks the rise of the other gravity member 2. The above are all existing technologies and will not be repeated. The innovation of this embodiment is that a secondary locking rod 5 is set above the locking block 4. Here, secondary means relative to the primary locking of the locking block 4. The secondary locking is used to lock the locking block 4 that has been locked once. The following text provides a variety of different secondary locking methods. The position of the locking block 4 is locked through the secondary locking rod 5 to prevent the other gravity member 2 from slightly moving upward due to the wind pressure driving the other closed air door to rotate slightly and squeeze the locking block 4 to drive the locking block 4 to swing, so that the gravity member 2 that has been fully raised can be lowered smoothly.

[0034] In the underground ventilation monitoring device provided by an embodiment of the present invention, during the rising stroke of the gravity member 2, the locking block 4 is first squeezed and flipped over, and then the flipped locking block 4 is locked by the secondary locking rod 5. In this way, the locking block 4 will not be affected by another gravity member 2 that may rise, thereby reducing or even eliminating the probability of the locking block 4 getting stuck in the gravity member 2.

[0035] In one embodiment provided by the present invention, the locking block 4 is swingably connected in the shell 3, and the two ends of the swing stroke of the locking block 4 are respectively located on the rising stroke of the two gravity members 2. Most commonly, the locking block 4 is an isosceles triangle block. After the isosceles triangle block is driven by the rising of one gravity member 2, it moves by gravity to limit the other gravity member 2. The isosceles triangle is rotatably connected in the shell 3 with its vertex angle (the angle connecting the two waist sides), and its other two angles are alternately blocked on the rising stroke of one gravity member 2 through the rotation of the isosceles triangle.

[0036] Preferably, when the locking block 4 limits the rising stroke of one of the gravity members 2, there is a gap between it and the other gravity member 2. At this time, the locking block 4 needs to automatically flip over by gravity at the end of the stroke when it is squeezed by the rising gravity member 2. This automatic flipping by gravity allows the locking block 4 to separate from the gravity member 2 that drives itself. Generally speaking, this effect can be achieved when the vertex angle of the isosceles triangle is greater than 120 degrees or even reaches 150 degrees. Obviously, other structures can also achieve this. Just configure the shape reasonably so that the center of gravity at the end of the stroke is close to the center line of the two gravity members 2. In this way, the descent of the rising gravity member 2 will not be affected by the friction of the locking block 4.

[0037] In this embodiment, the secondary locking rod 5 is connected to the housing 3 by swinging at its center, forming a lever-like structure, with one end rising and the other end falling. The end of the secondary locking rod 5 is located on the rising stroke of the weight member 2, and the end of the secondary locking rod 5 is located above the locking block 4. In this way, the rising of the weight member 2 drives the locking block 4 to flip, which drives one end of the secondary locking rod 5 to rise, causing the other end to fall and then limit the locking block 4. Here, the locking block 4 rotates from the bottom of the secondary locking rod 5, while the secondary locking rod 5 flips from the top of the locking block 4. It is only necessary to ensure that the end of the secondary locking rod 5 after flipping enters the return stroke of the locking block 4. This is simple knowledge from junior high school geometry, and the corresponding position arrangement can be sufficed and will not be repeated. In this way, the end of the secondary locking rod 5 blocks the return of the locking block 4, preventing the locking block 4 from returning to its original position. In other words, even if the other weight member 2 that has not risen rises, it will not drive the locking block 4 to squeeze the rising weight member 2.

[0038] In this embodiment, the secondary locking rod 5 relies on elastic force or gravity to achieve the reset of the gravity member 2 after it is disengaged. The limiting of the secondary locking rod 5 can be achieved by several protrusions in the shell 3. This is the existing technology and will not be repeated. However, the secondary locking rod 5 also needs to be reset after the driven gravity member 2 falls back. Obviously, an elastic member can achieve the reset. This is the existing technology, and it can also be achieved by gravity. For example, the rotating shaft of the secondary locking rod 5 is eccentrically arranged. In this way, in the absence of the squeezing of the gravity member 2, the secondary locking rod 5 will automatically rotate under the action of gravity to achieve reset.

[0039] In this embodiment, the two gravity members 2 need to correspond to two secondary locking rods 5, and the two secondary locking rods 5 may interfere with each other. At this time, the two secondary locking rods 5 can be staggered in the depth direction (the direction perpendicular to the parallel direction of the two gravity members 2 on the horizontal plane). For example, the thickness of the gravity member 2 is 10 cm (length in the vertical direction, width and thickness in the horizontal direction), and a thickness of 5 cm is used to drive one secondary locking rod 5. In this way, the two gravity members 2 use two 5 cm front and rear to drive the two secondary locking rods 5 to achieve staggering in the depth direction.

[0040] In another embodiment provided by the present invention, further, the secondary locking rod 5 includes a first section 5.3 and a second section 5.4, and the second section 5.4 is rotatably connected to the first section 5.3 through a rotating shaft and a torsion spring. In daily life, the second section 5.4 is docked with the first section 5.3 by relying on the spring force of the torsion spring to form the secondary locking rod 5. At the same time, an axial through hole is provided in the secondary locking rod 5, which passes through the first section 5.3 and extends into the second section 5.4. A limiting rod 5.5 is movably connected to the axial through hole. The limiting rod 5.5 is limited in the first section 5.3 by an elastic member (not shown in the figure). The end of the limiting rod 5.5 extends out of the first section 5.3 and is exposed. When in use, the secondary locking rod 5 receives the drive of the gravity member 2 with the first section 5.3, and the second section 5.4 is locked. The second section 5.4 removes the limit locking block 4. At this time, the gravity member 2 will squeeze the limit rod 5.5 to make it move axially. The axial movement causes its end to be inserted into the second section 5.4, thus completely locking the second section 5.4 and the first section 5.3 so that both lose their ability to rotate. The above is the normal use process. The purpose of the above setting is to prevent the locking block 4 from getting stuck. When one damper is opened, if the other damper is slightly opened by wind pressure, it drives the other gravity member 2 to squeeze the locking block 4. The locking block 4 squeezes the secondary locking rod 5 to form a stable force state. The several are relatively stationary and do not affect the reset of the gravity member 2 that has already risen. The switches are all normal, but at this time, since the secondary locking rod 5 will not be reset, the slightly opened damper cannot be actively opened first next time and is completely stuck. In this embodiment, although it is still in a stuck state, when the slightly opened damper is actively opened, the damper opening force is relatively large. At this time, the gravity member 2 can forcibly squeeze the locking block 4, and the locking block 4 forcibly squeezes the second section 5.4. At this time, the limit rod 5.5 is separated from the second section 5.4. The second section 5.4 is forcibly squeezed and rotates relative to the first section 5.3 to make way for the locking block 4. After the locking block 4 rotates away, the second section 5.4 is then reset with the first section 5.3. In other words, even if a jam occurs, it does not affect the next opening of the two dampers.

[0041] In another embodiment provided by the present invention, the size of the base side (the side connecting the two waists) of the locking block 4 of the isosceles triangle is designed to be smaller than the distance between the two gravity members 2. This brings an effect, that is, under some working conditions (such as maintenance), it is necessary to open the two dampers at the same time. The existing technology requires opening the shell 3 to disassemble the locking block 4, which is more troublesome. This embodiment can control the two dampers to open at the same time. At this time, the isosceles triangle will be sandwiched by the two gravity members 2. Because the size of the base side is smaller than the distance between the two gravity members 2, the two gravity members 2 will not be affected if they are pulled up at the same time. Moreover, the base side is in a basically horizontal state at this time, and will not affect the two secondary locking rods 5. However, this structure has another problem: during normal use, it is impossible to rely on the drive of one gravity member 2 to flip to a position in the middle of covering the other, that is, the gravity member 2 alone cannot drive it to rotate across its gravity center line (if it exceeds the size, it will exceed the distance between the two gravity members 2, and the two are essentially the same problem). To solve this problem, in this embodiment, an elastic sheet 6 such as a rubber sheet is provided on the outer wall of the gravity member 2, and a vertical groove is provided in the shell 3 for the elastic sheet 6 to move. During the rising process of the gravity member 2, the elastic sheet 6 protruding from the gravity member 2 is used to squeeze the locking block 4 to enable it to flip, and the elastic sheet 6 can be deformed. When the two gravity members 2 are pulled up at the same time, the elastic sheet 6 is deformed to cross the locking block 4 by relying on the huge pulling force. Subsequently, when the gravity member 2 descends, it is necessary to manually limit the position of the locking block 4 to help the elastic sheet 6 descend. This is the only position in the entire process that requires manual operation by workers.

[0042] In another embodiment provided by the present invention, the locking block 4 reciprocates in the shell 3, and the two ends of the reciprocating stroke of the locking block 4 are respectively located on the rising stroke of the two gravity members 2. At this time, the locking block 4 is a strip member, and a straight channel is provided in the shell 3 so that the locking block 4 can reciprocate, and the length of the locking block 4 is such that one end thereof is located on the rising stroke of one gravity member 2, so that when one end is driven to squeeze and move, the other end will be extended to the rising stroke of the other gravity member 2, so that it has one end blocking the rising stroke of one gravity member 2. In order to realize the driving of the locking block 4 by the gravity member 2, a first wedge surface 4.1 can be provided at the end of the locking block 4, and a second wedge surface 2.1 can be provided on the top of the gravity member 2. During the rising process of the gravity member 2, the locking block 4 is driven to reciprocate by the wedge cooperation of the first wedge surface 4.1 and the second wedge surface 2.1.

[0043] When the locking block 4 is unlocked, the locking groove 4.2 is initially not located below the vertical rod 5.2. When the locking block 4 is squeezed, the locking groove 4.2 enters the bottom of the vertical rod 5.2, so that when the vertical rod 5.2 is subsequently lowered, it is stuck in the locking groove 4.2 to achieve locking of the locking block 4. Preferably, a ball is provided on the top of the vertical rod 5.2, and the horizontal section is pressed on the ball, thereby reducing the horizontal friction resistance between the horizontal rod 5.1 and the vertical rod 5.2.

[0044] In another embodiment provided by the present invention, a simple solution is provided to alleviate the lifting of one gravity member 2 and the slight lifting of another gravity member 2. A channel is limited at the bottom of the shell 3, and a connecting rope 7 is located in the channel. The two ends of the connecting rope 7 are respectively connected to the bottom of the two gravity members 2. When one gravity member 2 rises to a preset height (when the damper is fully open), the connecting rope 7 is pulled straight to limit the other gravity member 2 so that it cannot rise.

[0045] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims.

Claims

1. A downhole ventilation monitoring device, comprising a locking mechanism and two dampers arranged opposite to each other, each damper being connected to a wire rope, the other end of each wire rope being connected to a weight member, the locking mechanism further comprising a housing and a locking block movably disposed within the housing, the two weight members being suspended side by side within the housing, characterized in that: The opening of any of the dampers drives the corresponding gravity member to rise, thereby driving the locking block to move to limit the rising stroke of the other gravity member, and further comprising: a secondary locking rod movably connected to the housing, the secondary locking rod being located above the locking block, and during the ascending process, the gravity member squeezes the secondary locking rod after squeezing the locking block, so that the secondary locking rod limits the locking block; The secondary locking rod includes a first section and a second section, the second section being rotatably connected to the first section by a rotating shaft and a torsion spring, and the spring force of the torsion spring causes the second section to dock with the first section to form a secondary locking rod. At the same time, an axial through-hole is formed in the secondary locking rod, which passes through the first section and extends into the second section. A limiting rod is movably connected in the axial through-hole, and the limiting rod is limited in the first section by an elastic member. The end of the limiting rod extends out of the first section and is exposed. When in use, the secondary locking rod receives the drive of the gravity member with the first section, and the second section moves against the limiting locking block. At this time, the gravity member squeezes the limiting rod to move axially, and the limiting rod moves axially so that its end is inserted into the second section, thereby completely locking the second section and the first section so that both lose the ability to rotate. If the damper is opened with a large force, the gravity member can forcibly squeeze the locking block, and the locking block forcibly squeezes the second section. At this time, the limiting rod is separated from the second section, and the second section is forced to rotate relative to the first section to clear the locking block. After the locking block rotates away, the second section is subsequently reset with the first section.

2. The underground ventilation monitoring device according to claim 1, characterized in that: When the locking block limits the upward stroke of one of the gravity members, a gap is formed between the locking block and the other gravity member.

3. The underground ventilation monitoring device according to claim 1, characterized in that: The locking block is swingably connected in the housing, and both ends of the swing stroke of the locking block are respectively located on the rising strokes of the two gravity members.

4. The underground ventilation monitoring device according to claim 3, characterized in that: The locking block is an isosceles triangle block. After being lifted up by one gravity member, the isosceles triangle block moves to limit the other gravity member by relying on gravity.

5. The underground ventilation monitoring device according to claim 3, characterized in that: The secondary locking rod is connected to the housing by swinging at its middle part, and the rise of the gravity member drives one end of the secondary locking rod to rise so that the other end falls and limits the locking block.

6. The underground ventilation monitoring device according to any one of claims 3 to 5, characterized in that: The secondary locking rod relies on elastic force or gravity to achieve reset after the gravity member is separated.

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