Intelligent dry oil lubrication system for coal mines

Abstract

The present invention discloses an intelligent dry oil lubrication system for coal mines, which belongs to the field of lubrication technology. The system includes a dry grease barrel, a dry grease pump, a main valve, a main delivery pipeline, a branch delivery pipeline, an oil inlet valve, a main control box and a distribution box. The oil distribution device in the distribution box includes a plurality of quantitative oil control valves installed side by side, and the quantitative oil control valve includes a reciprocating valve stem and an adjusting rod for adjusting the opening length of the oil regulating long hole on the valve stem. The main control box and the distribution box are both explosion-proof boxes. The present invention realizes independent and precise control of the oil volume of each line by controlling the reciprocating frequency of the valve stem and the opening length of the oil regulating long hole, and also avoids illegal operation through the linkage mechanism of mechanisms such as linkage rods.

Description

Technical Field

[0001] The invention belongs to the technical field of lubrication, and in particular relates to a dry oil lubrication system for coal mines. Background Art

[0002] In coal mine operations, the lubrication of mechanical equipment is crucial to ensure its stable operation. At present, the intelligent dry oil lubrication system for coal mines not only integrates multi-way lubrication functions, but also realizes explosion-proof functions through a box with good sealing, thus providing efficient and safe lubrication solutions for coal mine machinery.

[0003] However, the existing intelligent dry oil lubrication system for coal mines still has the following defects:

[0004] First, the traditional oil circuit distribution device cannot achieve independent and precise adjustment of the oil volume of the lubricating oil circuit leading to each lubrication point. Although the grease lubrication system proposed by the Chinese utility model patent with the authorization announcement number CN221592520U can independently control the amount of grease in each circuit by controlling the action frequency of the piston, the amount of grease output by the piston during each reciprocating motion is fixed. Therefore, when the required amount of grease is low, the piston action frequency is very low, which is essentially equivalent to intermittent oil supply and has poor uniformity.

[0005] Secondly, although the existing explosion-proof boxes have good sealing properties and can effectively prevent sparks and arcs from escaping or entering, thereby reducing the risk of fire and explosion, they do not have the function of preventing operators from operating in violation of regulations. In actual production, operators often open the box with power on, or directly turn on the power without closing the door, which can easily lead to explosions in coal mines. Summary of the invention

[0006] The present invention proposes an intelligent dry oil lubrication system for coal mines, the purpose of which is: 1. To solve the problem of poor oil supply uniformity when accurately adjusting the oil volume of each lubricating oil circuit. 2. To solve the problem of being unable to prevent the operator from illegally opening the box door with power on and directly powering on when opening the box.

[0007] The technical solution of the present invention is as follows:

[0008] An intelligent dry oil lubrication system for coal mines, comprising a dry grease barrel, a dry grease pump, a main valve, a main delivery pipeline, a branch delivery pipeline, an oil inlet valve, a main control box and a distribution box, wherein the oil inlet end of the dry grease pump is connected to the oil outlet end of the dry grease barrel, and the oil inlet and outlet ends of the dry grease pump are connected to the oil inlet ends of each branch delivery pipeline through the main delivery pipeline, a main valve is provided on the main delivery pipeline, and an oil inlet valve is provided on each branch delivery pipeline; the oil outlet end of each branch delivery pipeline is respectively connected to the oil distribution device in the corresponding distribution box, and the multiple oil outlet ends of the oil distribution device are respectively connected to the corresponding lubrication points through the lubrication pipeline; the main control box is electrically connected to the dry grease pump through a cable; the main control box and the distribution box are both explosion-proof boxes; the oil distribution device comprises a plurality of quantitative oil control valves installed side by side;

[0009] The quantitative oil control valve comprises a valve body, on which an oil inlet hole and an oil outlet hole are arranged; the oil inlet holes of each quantitative oil control valve are connected to each other and to the oil outlet end of the corresponding branch delivery pipeline, and the oil outlet hole is connected to the corresponding lubrication pipeline;

[0010] The valve body is also provided with a valve hole, the oil outlet end of the oil inlet hole is connected to the first position of the valve hole, and the oil inlet end of the oil outlet hole is connected to the second position of the valve hole;

[0011] A valve stem is installed in the valve hole by sliding fit; a rotary drive device is also installed on the valve body, an eccentric wheel is installed on the output shaft of the rotary drive device, and the eccentric wheel cooperates with the sliding sleeve installed on the valve stem to drive the valve stem to reciprocate in the valve hole;

[0012] The outer circumferential surface of the valve stem is provided with an annular oil passage groove corresponding to the first position and an oil outlet long hole corresponding to the second position, and the oil passage groove is provided with an oil adjustment long hole, and the oil adjustment long hole is connected with the oil outlet long hole through the oil passage of the valve stem core;

[0013] An adjusting rod is installed at one end of the valve hole by threaded matching, and the inner end of the adjusting rod extends into the oil passage and matches with the oil passage.

[0014] As a further improvement of the intelligent dry oil lubrication system for coal mines: a locking nut is also installed at the outer end of the adjusting rod.

[0015] As a further improvement of the intelligent dry oil lubrication system for coal mines: a damping spring for pushing the adjustment rod outward is also installed in the valve hole.

[0016] As a further improvement of the intelligent dry oil lubrication system for coal mines: the rotary drive device includes a motor and a reducer, the output shaft of the motor is connected to the input end of the reducer, and the eccentric wheel is installed on the output shaft of the reducer.

[0017] As a further improvement of the intelligent dry oil lubrication system for coal mines: the explosion-proof box includes a box body and a box door installed at the front end of the box body by a rotating connection and opened horizontally, and a sealing strip for contacting the box door is provided on the front side of the box body;

[0018] A first connecting flange is provided at the edge of the box body, and a second connecting flange is provided at the edge of the box door; a plurality of threaded holes are provided on the first connecting flange, and mounting holes corresponding to the threaded holes are provided on the second connecting flange; the explosion-proof box also includes a plurality of fixing screws corresponding to the threaded holes one by one, and the fixing screws are threadedly connected with the corresponding threaded holes after passing through the mounting holes.

[0019] As a further improvement of the intelligent dry oil lubrication system for coal mines: one side of the box door is rotatably connected to the front end of the box body;

[0020] A first linkage rod and a first spring for pushing the first linkage rod forward so that the front end of the first linkage rod contacts the closed door are installed on the outer wall of the other side of the box body in a sliding manner;

[0021] A stopper is provided on the first linkage rod;

[0022] A power switch knob is also installed on the outer wall of the other side of the box body, and a through slot for matching with the stopper is provided on the power switch knob;

[0023] When the power switch knob is in the power-on position, the through slot is in a vertical state, and when the power switch knob is in the power-off position, the through slot is in a horizontal state. At this time, if the box door is in an open state, the first linkage rod will move forward under the action of the first spring, so that the stopper cooperates with the through slot, causing the power switch knob to be unable to rotate and switch to the power-on position;

[0024] When the box door is closed, the box door pushes the first linkage rod backwards, so that the stopper is located behind the rotation area of ​​the power switch knob.

[0025] As a further improvement of the intelligent dry oil lubrication system for coal mines: the explosion-proof box also includes a square frame that is rotatably connected to the other side of the front end of the box body and is flatly opened, and the square frame is located outside the box door when the explosion-proof box is closed;

[0026] A second linkage rod and a second spring for pushing the second linkage rod forward so that the front end of the second linkage rod keeps in contact with the second cam that rotates with the square frame are also installed on the outer wall of the other side of the box body by means of sliding fit;

[0027] The power switch knob is also provided with a boss for contacting the rear end of the second linkage rod;

[0028] When the power switch knob is in the power-on position, the boss is in a horizontal state, and the boss abuts against the rear end of the second linkage rod so that it cannot move backward, causing the square frame to be unable to open; when the power switch knob is in the power-off position, the boss is in a vertical state. At this time, if the square frame is opened, the second cam pushes the second linkage rod to move backward, and the rear end of the second linkage rod can block the boss, causing the power switch knob to be unable to rotate and switch to the power-on position;

[0029] When the square frame is closed, the second spring pushes the second linkage rod forward, so that the rear end of the second linkage rod is located in front of the rotation area of ​​the power switch knob.

[0030] As a further improvement of the intelligent dry oil lubrication system for coal mines: the upper and lower ends of the box body are respectively provided with left and right sliding grooves, the outer side of the box body is sleeved with a sliding frame matched with the sliding grooves, and the sliding frame is provided with two ear plates, which are respectively located on the left and right sides of the first cam that rotates with the square frame;

[0031] The slide frame is provided with a detection mechanism for detecting whether the fixing screw is installed in place. When the fixing screw is installed in place, the pin in the detection mechanism retreats, so that the slide frame can slide left and right under the action of the first cam.

[0032] As a further improvement of the intelligent dry oil lubrication system for coal mines: the detection mechanism is a spring pin assembly corresponding to the fixing screws one by one;

[0033] The spring pin assembly includes a fixing sleeve fixed to the back side of the slide frame, the pin arranged in the fixing sleeve, a compression spring located in the fixing sleeve for pushing the pin forward, and a screw plug installed at the rear end of the fixing sleeve;

[0034] The threaded hole matched with the fixing screw is a threaded through hole. When the square frame is opened, the first cam drives the sliding frame to move so that the pin is directly opposite to the threaded through hole.

[0035] As a further improvement of the intelligent dry oil lubrication system for coal mines: the box door is rotatably connected to the box body through a right-angle hinge shaft;

[0036] The horizontal axis of the right-angle hinge axis matches with the first hinge sleeve installed on the box body, and a retaining ring is provided at the rear end of the horizontal axis, and there is a spacing between the retaining ring and the first hinge sleeve;

[0037] The vertical axis of the right-angle hinge axis is used to match with the second hinge sleeve on the cabinet door.

[0038] Compared with the prior art, the present invention has the following positive effects:

[0039] 1. The quantitative oil control valve in the present invention uses an eccentric wheel to realize intermittent oil feeding. It can not only adjust the frequency of each oil delivery by changing the speed of the motor, but also change the opening length of the oil adjustment long hole at each oil delivery by manually rotating the adjustment rod, thereby realizing the double-layer control of frequency and single oil volume. When the required oil volume is low, the oil volume delivered at a single time can be reduced by narrowing the opening length without significantly reducing the delivery frequency, which not only realizes the precise fine-tuning of the oil volume, but also ensures the uniformity of oil supply.

[0040] 2. The present invention realizes the detection of the closed state through two linkage rods, and realizes the restriction of the power-on operation through the cooperation between the linkage rod and the special-shaped power switch knob. Specifically, only when the box door is closed and the first linkage rod retracts without interfering with the through slot, and the square frame is closed and the second linkage rod pops forward without interfering with the boss, the power switch knob can be turned to the power-on state; only when the power is off and the rear end of the second linkage rod does not interfere with the boss, the square frame located on the outer side of the box door can be opened.

[0041] 3. The present invention also realizes the detection of the fixing screws and the interlocking control of the opening and closing of the square frame through the sliding frame and the spring pin assembly and the first cam that rotates with the square frame. Specifically, the square frame can only be closed when all the fixing screws are installed in place and all the pins are pushed to the point where their front ends are flush with the front end surface of the sliding frame. Otherwise, when closing the square frame, the ear plate on the sliding frame will block the first cam, making it impossible to close the square frame.

[0042] 4. The external mechanisms such as the linkage rod and the square frame in the present invention are all purely mechanical structures and will not add any new safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0044] Figure 2 A bottom view of multiple groups of quantitative oil control valves arranged side by side in a distribution box;

[0045] Figure 3 It is a structural schematic diagram of the quantitative oil control valve;

[0046] Figure 4 for Figure 3 A partial enlarged view of part A;

[0047] Figure 5 It is a three-dimensional diagram of the matching part of the valve stem and the regulating rod;

[0048] Figure 6 Schematic diagram of the distribution box with the door opened;

[0049] Figure 7 This is a side view of the explosion-proof box with the door closed and powered on;

[0050] Figure 8 for Figure 7 A partial enlarged view of part B;

[0051] Fig. 9 for Figure 7 A partial enlarged view of part C in the middle;

[0052] Fig.10 for Figure 7 A partial enlarged view of part D in the middle;

[0053] Fig.11 The power switch knob, the first linkage rod, the second linkage rod, the second cam on the square frame and the door portion are provided along the Figure 7 Schematic diagram when observing from the E direction;

[0054] Fig.12 This is a side view of the explosion-proof box with the door open and the power off;

[0055] Fig.13 for Fig.12 A partial enlarged view of part F in the middle;

[0056] Fig.14 for Fig.12 A partial enlarged view of the middle G part;

[0057] Fig.15 The power switch knob, the first linkage rod, the second linkage rod, the second cam on the square frame and the door portion are provided along the Fig.12 Schematic diagram when observing from the middle H direction;

[0058] Fig.16 It is a partial structural diagram of the ear plate and the first cam portion;

[0059] Fig.17 It is a connection diagram of a right-angle hinge axis, a first hinge sleeve and a second hinge sleeve.

[0060] Reference numerals include:

[0061] 1. Dry grease barrel, 2. Dry grease pump, 3. Main valve, 4. Main delivery pipeline, 5. Branch delivery pipeline, 6. Oil inlet valve, 7. Distribution box, 8. Quantitative oil control valve, 9. Main control box, 801. Locking nut, 802. Valve body, 803. Oil outlet hole, 804. Motor, 805. Reducer, 806. Eccentric wheel, 807. Sleeve, 808. Valve stem, 80801. Oil outlet long hole, 80802. Oil passage, 80803. Oil adjustment long hole, 80804. Oil groove, 809. Adjusting rod, 810. Damping spring, 811. Oil inlet hole, 101. Box body, 10101. Power-off limit column, 10102. Power-on limit column, 10103. First hinge sleeve, 102. Box door, 10201. Second hinge sleeve, 103. First connecting flange, 104. Second connecting flange, 105. Right-angle hinge shaft, 10501. Retaining ring, 106. Square frame, 107. First linkage rod, 10701. Stopper, 108. Power switch knob, 10801. Boss, 10802. Limit pin, 10803. Through slot, 109. Second linkage rod, 110. Slide slot, 111. Fixing screw, 112. Slide frame, 11201. Ear plate, 113. Spring pin assembly, 11301. Fixing sleeve, 11302. Screw plug, 11303. Compression spring, 11304. Pin, 114. First cam, 115. Second cam. DETAILED DESCRIPTION

[0062] The technical solution of the present invention is described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0063] like Figure 1 An intelligent dry oil lubrication system for coal mines includes a dry grease barrel 1, a dry grease pump 2, a main valve 3, a main delivery pipeline 4, a branch delivery pipeline 5, an oil inlet valve 6, a main control box 9 and a distribution box 7.

[0064] The oil inlet of the dry grease pump 2 is connected to the oil outlet of the dry grease barrel 1. The oil inlet and outlet of the dry grease pump 2 are connected to the oil inlet of each branch delivery pipeline 5 through the main delivery pipeline 4. The main delivery pipeline 4 is provided with a main valve 3, and each branch delivery pipeline 5 is provided with an oil inlet valve 6. The oil outlet of each branch delivery pipeline 5 is respectively connected to the oil distribution device in the corresponding distribution box 7, and the multiple oil outlets of the oil distribution device are respectively connected to the corresponding lubrication points through the lubrication pipeline. The main control box 9 is electrically connected to the dry grease pump 2 through a cable, and is used to control the operation of the dry grease pump 2, and send the lubricating grease in the dry grease barrel 1 to each oil distribution device through the main delivery pipeline 4 and the branch delivery pipeline 5. The grease reaches each lubrication point after fine distribution.

[0065] like Figure 2 , Figure 6The oil distribution device includes a plurality of quantitative oil control valves 8 installed side by side.

[0066] like Figures 2 to 5 The quantitative oil control valve 8 includes a valve body 802, and the valve body 802 is provided with an oil inlet hole 811 and an oil outlet hole 803. The oil inlet holes 811 of each quantitative oil control valve 8 are connected to each other and to the oil outlet end of the corresponding branch delivery pipeline 5. The front oil outlet hole 803 is connected to the corresponding lubrication pipeline.

[0067] A vertical valve hole is also provided in the valve body 802, the oil outlet end of the oil inlet hole 811 is connected to the first position of the valve hole, and the oil inlet end of the oil outlet hole 803 is connected to the second position of the valve hole. In this embodiment, the first position is lower than the second position.

[0068] A valve stem 808 is installed in the valve hole by sliding fit. A rotary drive device is also installed on the valve body 802, and an eccentric wheel 806 is installed on the output shaft of the rotary drive device. In this embodiment, the rotary drive device includes a motor 804 and a reducer 805, the output shaft of the motor 804 is connected to the input end of the reducer 805, and the eccentric wheel 806 is installed on the output shaft of the reducer 805.

[0069] The eccentric wheel 806 cooperates with the sliding sleeve 807 installed on the valve stem 808 to drive the valve stem 808 to move back and forth in the valve hole.

[0070] The outer circumferential surface of the valve stem 808 is provided with an annular oil passage groove 80804 corresponding to the first position and an oil outlet slot 80801 corresponding to the second position. When the valve stem 808 moves up and down, the oil passage groove 80804 is always connected to the oil outlet hole 803.

[0071] An oil regulating long hole 80803 is provided on the oil groove 80804 , and the oil regulating long hole 80803 is connected with the oil outlet long hole 80801 through the oil passage 80802 in the core of the valve stem 808 .

[0072] The lower end of the valve hole is installed with an adjusting rod 809 by threaded matching, and the outer end of the adjusting rod 809 is also installed with a locking nut 801. A damping spring 810 is also installed in the valve hole for pushing the adjusting rod 809 outward. The upper end of the adjusting rod 809 extends into the oil passage 80802 and matches with the oil passage 80802.

[0073] When the valve stem 808 moves downward, the oil groove 80804 will reach the first position and connect with the oil inlet hole 811. At this time, the grease enters the oil groove 80804 and passes through the oil adjustment long hole 80803, the oil passage 80802 and the oil outlet long hole 80801 in sequence to reach the oil outlet hole 803. Obviously, the open length of the oil adjustment long hole 80803 is determined by the position of the adjusting rod 809. The higher the adjusting rod 809 is, the longer the blocked part of the oil adjustment long hole 80803 is, and vice versa. The shorter the blocked part is. During lubrication, the staff can not only set different speeds for each motor 804 according to the amount of grease required for each lubrication point, change the reciprocating frequency of different valve stems 808, and achieve the purpose of adjusting the oil supply of each lubricating grease, but also can adjust the height of the adjusting rod 809 to change the length of the oil adjustment long hole 80803 that can be opened, and accurately adjust the oil amount. After adjustment, the position of the adjusting rod 809 can be locked by the locking nut 801.

[0074] Furthermore, the main control box 9 and the distribution box 7 are both explosion-proof boxes. Figure 6 The distribution box 7 in FIG. 1 is used as an example for explanation.

[0075] The explosion-proof box includes a box body 101 and a box door 102 which is installed at the front end of the box body 101 by a rotation connection and opens horizontally. A sealing strip for contacting the box door 102 is provided on the front side of the box body 101.

[0076] A first connection flange 103 is provided at the edge of the box body 101, and a second connection flange 104 is provided at the edge of the box door 102. The first connection flange 103 is provided with a plurality of threaded holes, and the second connection flange 104 is provided with mounting holes corresponding to the threaded holes. The explosion-proof box also includes a plurality of fixing screws 111 corresponding to the threaded holes one by one, and the fixing screws 111 are threadedly connected with the corresponding threaded holes after passing through the mounting holes. The function of the fixing screws 111 is to ensure that the sealing strip is compressed to achieve better sealing.

[0077] Specifically, Figures 6 to 15 , one side of the box door 102 is rotatably connected to the front end of the box body 101. A first linkage rod 107 with a rectangular cross-section and a first spring for pushing the first linkage rod 107 forward so that the front end of the first linkage rod 107 contacts the closed box door 102 are installed on the outer wall of the other side of the box body 101 by sliding fit. A stopper 10701 is provided on the first linkage rod 107.

[0078] A power switch knob 108 is also installed on the outer wall of the other side of the box body 101. A limit pin 10802 is arranged on the power switch knob 108, and a corresponding power-on limit column 10102 and power-off limit column 10101 are arranged on the side wall of the box body 101.

[0079] The power switch knob 108 is provided with a through slot 10803 for cooperating with the stopper 10701. Fig. 9 and Fig.11 When the power switch knob 108 is in the power-on position, the slot 10803 is in a vertical state. Figures 12 to 15 When the power switch knob 108 is in the power-off position, the through slot 10803 is in a horizontal state. At this time, if the box door 102 is in the open state, the first linkage rod 107 will move forward under the action of the first spring to resist the box door 102 or reach the front end limit position, so that the stopper 10701 cooperates with the through slot 10803, resulting in the power switch knob 108 being unable to rotate and switch to the power-on position, thereby achieving the purpose of "power cannot be turned on without closing the box door 102".

[0080] When the door 102 is closed, Figure 7 , Figures 9 to 11 , the box door 102 pushes the first linkage rod 107 backward, so that the stopper 10701 is located behind the rotation area of ​​the power switch knob 108. At this time, the first linkage rod 107 will not block the rotation of the power switch knob 108.

[0081] Furthermore, if Figures 7 to 15 The explosion-proof box further includes a square frame 106 which is rotatably connected to the other side of the front end of the box body 101 and is flatly opened. When the explosion-proof box is closed, the square frame 106 is located outside the box door 102. The square frame 106 corresponds to the distribution area of ​​the fixing screws 111.

[0082] The second linkage rod 109 and a second spring for pushing the second linkage rod 109 forward so that the front end of the second linkage rod 109 keeps in contact with the second cam 115 that rotates with the square frame 106 are also installed on the outer wall of the other side of the box body 101 by sliding fit. Fig.10 and Fig.14 When the square frame 106 is closed, the second linkage rod 109 moves forward, and when the square frame 106 is opened, the second cam 115 pushes the second linkage rod 109 backward.

[0083] like Figure 7 , Figures 9 to 11 The power switch knob 108 is also provided with a boss 10801 for contacting the rear end of the second linkage rod 109. When the power switch knob 108 is in the power-on position, the boss 10801 is in a horizontal state, and at this time, the boss 10801 abuts against the rear end of the second linkage rod 109 so that it cannot move backward, resulting in the square frame 106 being unable to open, thereby achieving the purpose of "the square frame 106 cannot be opened without power failure".

[0084] like Figures 12 to 15When the power switch knob 108 is in the power-off position, the boss 10801 is in a vertical state. At this time, if the square frame 106 is opened, the second cam 115 pushes the second linkage rod 109 to move backward. The rear end of the second linkage rod 109 can block the boss 10801, causing the power switch knob 108 to be unable to rotate and switch to the power-on position, thereby achieving the purpose of "power cannot be turned on without closing the square frame 106".

[0085] When the square frame 106 is closed, the second spring pushes the second linkage rod 109 forward so that the rear end of the second linkage rod 109 is located in front of the rotation area of ​​the power switch knob 108. At this time, the second linkage rod 109 will not block the rotation of the power switch knob 108.

[0086] Furthermore, in order to ensure that all fixing screws 111 are installed in place before closing the square frame 106, a linkage mechanism between the square frame 106 and the fixing screws 111 is added:

[0087] like Figure 8 The upper and lower ends of the box body 101 are respectively provided with left and right sliding grooves 110, and the outer side of the box body 101 is covered with a sliding frame 112 that matches the sliding grooves 110. Fig.15 The sliding frame 112 is provided with two ear plates 11201 , and the two ear plates 11201 are respectively located on the left and right sides of the first cam 114 that rotates with the square frame 106 .

[0088] The slide frame 112 is provided with a detection mechanism for detecting whether the fixing screws 111 are installed in place. Figure 8 , the detection mechanism is a spring pin assembly 113 corresponding to the fixing screw 111. The spring pin assembly 113 includes a fixing sleeve 11301 fixed to the back side of the slide frame 112, the pin 11304 arranged in the fixing sleeve 11301, a compression spring 11303 located in the fixing sleeve 11301 for pushing the pin 11304 forward, and a screw plug 11302 installed at the rear end of the fixing sleeve 11301. The threaded hole matched with the fixing screw 111 is a threaded through hole.

[0089] When the square frame 106 is opened, the first cam 114 drives the slide frame 112 to move so that the pin 11304 faces the threaded through hole. Only when all the fixing screws 111 are installed in place and all the pins 11304 are retracted until the front end surface is flush with the front end surface of the slide frame 112, the slide frame 112 can move left and right. Otherwise, the pin 11304 is located in the threaded through hole and the slide frame 112 cannot move. Fig.16If the movement condition of the sliding frame 112 is not met, when trying to close the square frame 106, the first cam 114 cannot rotate due to the obstruction of the ear plate 11201, and the square frame 106 cannot be closed. Only when the movement condition of the sliding frame 112 is met, the first cam 114 can push the sliding frame 112, and the square frame 106 can be closed normally.

[0090] Furthermore, if Figure 6 and 17 The door 102 is rotatably connected to the box body 101 through a right-angle hinge shaft 105. The horizontal axis of the right-angle hinge shaft 105 is matched with a first hinge sleeve 10103 installed on the box body 101. A retaining ring 10501 is provided at the rear end of the horizontal axis. There is a gap between the retaining ring 10501 and the first hinge sleeve 10103, so that the door 102 can have a certain front and rear floating range relative to the box body 101. The vertical axis of the right-angle hinge shaft 105 is used to match the second hinge sleeve 10201 on the door 102.

[0091] The correct operation process is as follows:

[0092] Before powering on, first close the door 102, move the first linkage rod 107 backward, and then install all the fixing screws 111 to achieve sealing, and move all the pins 11304 backward so that the sliding frame 112 meets the moving conditions. Then close the square frame 106, and the sliding frame 112 will move horizontally accordingly. The second cam 115 will avoid and move the second linkage rod 109 forward. At this time, the power switch knob 108 is unlocked and can rotate freely. Finally, switch the power switch knob 108 to the power-on state. After power is turned on, the boss 10801 is against the rear end of the second linkage rod 109, and the square frame 106 cannot be opened. Naturally, it is also impossible to open the door 102 or remove the fixing screws 111 (the square frame 106 will block the fixing screws 111).

[0093] When the explosion-proof box needs to be opened, the power switch knob 108 is first switched to the power-off state, and then the square frame 106 can be opened. When the square frame 106 is opened, the second linkage rod 109 retreats and presses against the power switch knob 108 so that it cannot be switched to the power-on state, and at the same time, the slide frame 112 moves into position and the pin 11304 is aligned with the fixing screw 111. Then all the fixing screws 111 are removed, and during this process, the pin 11304 is automatically inserted into the threaded hole, so that the slide frame 112 is in an immovable state, and finally the box door 102 is opened, the first linkage rod 107 moves forward, and the block 10701 cooperates with the through slot 10803, so that the power switch knob 108 cannot be switched to the power-on state.

[0094] Through the above mechanism, operators' illegal operations can be effectively avoided and safety hazards in the coal mine production process can be reduced.

[0095] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. The scope of the present invention is defined by the claims rather than the above description.

Claims

1. An intelligent dry oil lubrication system for coal mines, comprising a dry oil barrel (1), a dry oil pump (2), a main valve (3), a main delivery pipeline (4), a branch delivery pipeline (5), an oil inlet valve (6), a main control box (9) and a distribution box (7), wherein the oil inlet end of the dry oil pump (2) is connected to the oil outlet end of the dry oil barrel (1), the oil inlet and outlet ends of the dry oil pump (2) are connected to the oil inlet ends of each branch delivery pipeline (5) through the main delivery pipeline (4), the main delivery pipeline (4) is provided with a main valve (3), and each branch delivery pipeline (5) is provided with an oil inlet valve (6); the oil outlet end of each branch delivery pipeline (5) is respectively connected to the oil distribution device in the corresponding distribution box (7), and the multiple oil outlet ends of the oil distribution device are respectively connected to the corresponding lubrication points through the lubrication pipeline; the main control box (9) is electrically connected to the dry oil pump (2) through a cable; the main control box (9) and the distribution box (7) are both explosion-proof boxes; characterized in that: The oil distribution device comprises a plurality of quantitative oil control valves (8) installed side by side; The quantitative oil control valve (8) comprises a valve body (802), and the valve body (802) is provided with an oil inlet hole (811) and an oil outlet hole (803); the oil inlet holes (811) of each quantitative oil control valve (8) are interconnected and connected to the oil outlet end of the corresponding branch delivery pipeline (5), and the oil outlet hole (803) is connected to the corresponding lubrication pipeline; The valve body (802) is also provided with a valve hole, the oil outlet end of the oil inlet hole (811) is connected to the first position of the valve hole, and the oil inlet end of the oil outlet hole (803) is connected to the second position of the valve hole; A valve stem (808) is installed in the valve hole by means of a sliding fit; a rotary drive device is also installed on the valve body (802), an eccentric wheel (806) is installed on the output shaft of the rotary drive device, and the eccentric wheel (806) cooperates with a sliding sleeve (807) installed on the valve stem (808) to drive the valve stem (808) to move back and forth in the valve hole; An annular oil passage groove (80804) corresponding to the first position and an oil outlet long hole (80801) corresponding to the second position are provided on the outer circumferential surface of the valve stem (808); an oil regulating long hole (80803) is provided on the oil passage groove (80804); the oil regulating long hole (80803) is connected to the oil outlet long hole (80801) through an oil passage (80802) in the core of the valve stem (808); An adjusting rod (809) is installed at one end of the valve hole by means of threaded engagement, and the inner end of the adjusting rod (809) extends into the oil passage (80802) and engages with the oil passage (80802); The explosion-proof box comprises a box body (101) and a box door (102) which is installed at the front end of the box body (101) by a rotational connection and opens horizontally, and a sealing strip for contacting the box door (102) is provided on the front side of the box body (101); A first connecting flange (103) is provided at the edge of the box body (101), and a second connecting flange (104) is provided at the edge of the box door (102); the first connecting flange (103) is provided with a plurality of threaded holes, and the second connecting flange (104) is provided with mounting holes corresponding to the threaded holes; the explosion-proof box further comprises a plurality of fixing screws (111) corresponding to the threaded holes one by one, and the fixing screws (111) are threadedly connected to the corresponding threaded holes after passing through the mounting holes; One side of the box door (102) is rotatably connected to the front end of the box body (101); A first linkage rod (107) and a first spring for pushing the first linkage rod (107) forward so that the front end of the first linkage rod (107) contacts the closed door (102) are mounted on the outer wall of the other side of the box body (101) in a sliding manner; A stopper (10701) is provided on the first linkage rod (107); A power switch knob (108) is also mounted on the outer wall of the other side of the box body (101), and a through slot (10803) for cooperating with the stopper (10701) is provided on the power switch knob (108); When the power switch knob (108) is in the power-on position, the slot (10803) is in a vertical state. When the power switch knob (108) is in the power-off position, the slot (10803) is in a horizontal state. At this time, if the box door (102) is in the open state, the first linkage rod (107) will move forward under the action of the first spring, so that the stopper (10701) cooperates with the slot (10803), resulting in the power switch knob (108) being unable to rotate and switch to the power-on position. When the box door (102) is closed, the box door (102) pushes the first linkage rod (107) backwards, so that the stopper (10701) is located behind the rotation area of ​​the power switch knob (108); The explosion-proof box further comprises a square frame (106) which is rotatably connected to the other side of the front end of the box body (101) and is opened horizontally. When the explosion-proof box is closed, the square frame (106) is located outside the box door (102); A second linkage rod (109) and a second spring for pushing the second linkage rod (109) forward so that the front end of the second linkage rod (109) keeps in contact with a second cam (115) that rotates with the square frame (106) are also mounted on the outer wall of the other side of the box body (101) in a sliding manner; The power switch knob (108) is also provided with a boss (10801) for contacting the rear end of the second linkage rod (109); When the power switch knob (108) is in the power-on position, the boss (10801) is in a horizontal state. At this time, the boss (10801) abuts against the rear end of the second linkage rod (109) so that it cannot move backwards, resulting in the square frame (106) being unable to be opened; when the power switch knob (108) is in the power-off position, the boss (10801) is in a vertical state. At this time, if the square frame (106) is opened, the second cam (115) pushes the second linkage rod (109) to move backwards, and the rear end of the second linkage rod (109) can block the boss (10801), resulting in the power switch knob (108) being unable to rotate and switch to the power-on position; When the square frame (106) is closed, the second spring pushes the second linkage rod (109) forward, so that the rear end of the second linkage rod (109) is located in front of the rotation area of ​​the power switch knob (108); The upper and lower ends of the box body (101) are respectively provided with left-right sliding grooves (110); the outer side of the box body (101) is sleeved with a sliding frame (112) that matches the sliding groove (110); the sliding frame (112) is provided with two ear plates (11201); the two ear plates (11201) are respectively located on the left and right sides of a first cam (114) that rotates with the square frame (106); The slide frame (112) is provided with a detection mechanism for detecting whether the fixing screw (111) is installed in place; when the fixing screw (111) is installed in place, the pin (11304) in the detection mechanism retracts, allowing the slide frame (112) to slide left and right under the action of the first cam (114); The detection mechanism is a spring pin assembly (113) corresponding one-to-one to the fixing screw (111); The spring pin assembly (113) comprises a fixing sleeve (11301) fixed to the back side of the slide frame (112), the pin (11304) disposed in the fixing sleeve (11301), a compression spring (11303) located in the fixing sleeve (11301) and used for pushing the pin (11304) forward, and a screw plug (11302) mounted at the rear end of the fixing sleeve (11301); The threaded hole that cooperates with the fixing screw (111) is a threaded through hole. When the square frame (106) is opened, the first cam (114) drives the sliding frame (112) to move so that the pin (11304) faces the threaded through hole.

2. The intelligent dry oil lubrication system for coal mines according to claim 1, characterized in that: A locking nut (801) is also mounted on the outer end of the adjusting rod (809).

3. The intelligent dry oil lubrication system for coal mines according to claim 1, characterized in that: A damping spring (810) is also installed in the valve hole for pushing the adjustment rod (809) outward.

4. The intelligent dry oil lubrication system for coal mines according to claim 1, characterized in that: The rotary drive device comprises a motor (804) and a reducer (805), the output shaft of the motor (804) is connected to the input end of the reducer (805), and the eccentric wheel (806) is installed on the output shaft of the reducer (805).

5. The intelligent dry oil lubrication system for coal mines according to claim 1, characterized in that: The box door (102) is rotatably connected to the box body (101) via a right-angle hinge shaft (105); The transverse axis of the right-angle hinge shaft (105) cooperates with a first hinge sleeve (10103) installed on the box body (101), a retaining ring (10501) is provided at the rear end of the transverse axis, and a spacing exists between the retaining ring (10501) and the first hinge sleeve (10103); The vertical axis of the right-angle hinge axis (105) is used to cooperate with the second hinge sleeve (10201) on the cabinet door (102).

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