Mine geological disaster early warning device

Abstract

The invention discloses a mine geological disaster early warning device, and belongs to the field of mine safety monitoring. Comprising a supporting rod and a cleaning assembly, the cleaning assembly comprises a first moving unit and a second moving unit, and the first moving unit comprises a first sliding seat suitable for sliding in the linear direction of a side cover; the second moving unit comprises a second sliding seat suitable for sliding in the linear direction of the side cover, a cleaning brush is connected between the second sliding seat and the first sliding seat, the cleaning brush is tubular and provided with multiple sets of leaking holes, and the cleaning brush is connected with the water storage pipe through a hose; the water supply assembly comprises a water receiving box, the bottom face of the water receiving box is communicated with a water receiving pipe, the squeezing unit comprises a water storage pipe installed on the support and used for storing rainwater and a push rod suitable for squeezing the rainwater in the water storage pipe, the hose is connected with the water storage pipe, the water receiving pipe is connected with a connecting pipe, and the connecting pipe is connected with the water storage pipe. According to the mine geological disaster early warning device, the first moving unit and the second moving unit drive the cleaning brush to wipe and spray, and the water supply assembly cyclically utilizes rainwater for cleaning.

Description

Technical Field

[0001] The present invention relates to the technical field of mine safety monitoring, and in particular to a mine geological disaster early warning device. Background Art

[0002] During the mining process, geological disasters such as landslides, collapses, and mudslides occur frequently, seriously threatening the safety of people's lives and the stability of production facilities. Currently, mining geological disaster early warning devices are set up for monitoring. They mainly monitor parameters such as rainfall, soil moisture content, surface displacement, and crack expansion, and combine data analysis to achieve disaster early warning. Existing early warning devices mostly rely on solar power to adapt to remote mining areas.

[0003] During the operation of mine geological disaster early warning devices, solar panels, as the core energy supply component, are susceptible to environmental influences in the mining area, leading to power generation efficiency degradation. During use, mining dust (such as coal dust and metal rock dust), fallen leaves in the open air, and bird droppings can easily cover the surface of the solar panels, resulting in reduced power generation efficiency. Existing devices lack automatic cleaning functions and require regular manual wiping. This makes operation difficult and costly in scenarios such as high slopes and deep mining areas, and there is also a risk of falling from height. Therefore, it is necessary to design a mine geological disaster early warning device.

[0004] It should be noted that the above information disclosed in this Background section is only for understanding the background technology of the present application concept, and therefore, it may contain information that does not constitute prior art. Summary of the Invention

[0005] An embodiment of the present invention provides a mine geological disaster early warning device to solve the problem that the solar panels of the mine geological disaster early warning device are easily covered by dust, fallen leaves, and bird droppings in the mining area, resulting in reduced power generation efficiency, and the existing device requires manual cleaning and is difficult to operate.

[0006] The embodiment of the present invention adopts the following technical solution: a mine geological disaster early warning device. It mainly includes a support rod and a cleaning component, wherein a bracket is installed on the support rod, the bracket has two sets of inclined rods, the two sets of inclined rods are installed with solar panels, a control box is installed on the bracket, the cleaning component includes a mounting cover installed on the solar panel, side covers are installed on both sides of the mounting cover, a moving unit 1 is installed inside one set of side covers, the moving unit 1 includes a first sliding seat suitable for sliding along the straight direction of the side cover; a moving unit 2 is installed inside one set of side covers, the moving unit 2 includes a second sliding seat suitable for sliding along the straight direction of the side cover, and the second sliding seat is connected to the first sliding seat. There is a cleaning brush, which is a hollow tubular structure with multiple groups of leakage holes on the cleaning brush. The cleaning brush is connected to the water storage pipe through a hose; a water supply component, which includes a fixed sleeve installed on the support rod, a bracket plate installed on the fixed sleeve, a water receiving box installed on the bracket plate, a water receiving pipe installed on the bottom surface of the water receiving box, and an extrusion unit installed on the bracket. The extrusion unit includes a water storage pipe for storing rainwater and a push rod suitable for squeezing rainwater in the water storage pipe. One end of the push rod has a piston, one end of the hose is connected to the water storage pipe, and a connecting pipe is connected to the water receiving pipe, which is connected to the water storage pipe.

[0007] Furthermore, there is a certain gap between the water receiving box and the bracket plate, the water storage pipe is installed on the bracket, a first fixing plate is installed on the bracket, a second motor is installed on the side of the first fixing plate, the second motor is electrically connected to the control box, a first gear is installed on the output end of the second motor, a second fixing plate is installed at one end of the water storage pipe, a second screw rod is installed on a bearing between the first fixing plate and the second fixing plate, a second gear is installed near one end of the second screw rod, and the second gear is meshed with the first gear; A push plate is threadedly connected to the second screw rod, a limiting rod is installed between the first fixed plate and the second fixed plate, the push plate is movably sleeved on the limiting rod, the push rod is installed on the side of the push rod, and the piston is initially located in the water storage pipe near one end of the second motor.

[0008] Furthermore, the mobile unit 1 further includes a first concave plate installed in a group of the side covers, a first screw is installed in a bearing in the first concave plate, a first sliding seat is threadedly connected to the first screw, two groups of first guide rods are installed on the first concave plate, the first sliding seat slides on the two groups of first guide rods simultaneously, a first motor is installed at one end of the first concave plate, the first motor is electrically connected to the control box, and an output end of the first motor is connected to the first screw; The second moving unit further comprises a second concave plate installed in the side cover, two groups of second guide rods are installed on bearings in the second concave plate, and the second sliding seat is slidably sleeved on the second guide rods.

[0009] Furthermore, a filter is fixedly installed on the water receiving box near the opening.

[0010] Furthermore, a liquid level sensor is provided on the inner wall of the water receiving box.

[0011] Furthermore, a valve is provided at the connection point between the connecting pipe and the water storage pipe, the valve is electrically connected to the control box, and a position sensor is installed on the inner wall of the water storage pipe.

[0012] The at least one technical solution adopted in the embodiment of the present invention can achieve the following beneficial effects: A mining geological disaster early warning device uses first and second mobile units to drive a cleaning brush that slides along the side shield, physically wiping the solar panels to keep them clean and ensure power generation efficiency. The hollow tubular design of the cleaning brush, combined with a water supply assembly, enables spray cleaning, enhancing decontamination capabilities. The water supply assembly collects and filters rainwater through a water collection box and filter, then stores it in a water storage pipe via a connecting pipe. A push rod and piston squeeze the water, achieving water recycling. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings described herein are used to provide further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0014] In the attached figure: Figure 1 This is an overall schematic diagram of a mine geological disaster early warning device in this application; Figure 2 for Figure 1 Schematic diagram of the bottom structure; Figure 3 for Figure 2 Partial exploded view; Figure 4 for Figure 3 Schematic diagram of the local structure; Figure 5 for Figure 2 A magnified view of point A; Figure 6 for Figure 4 Enlarged view of point B; Reference numerals: 1. Warning assembly; 11. Support rod; 12. Top plate; 13. Rain sensor; 14. Bracket; 15. Slant rod; 16. Solar panel; 17. Control box; 2. Cleaning assembly; 21. Mounting cover; 22. Side cover; 23. First concave plate; 24. First screw rod; 25. First guide rod; 26. First motor; 27. Cleaning brush; 28. Second concave plate; 29. ​​Second guide rod; 210. Second sliding seat; 211. Hose; 3. Water supply assembly; 31. Fixing sleeve; 32. Bracket plate; 33. Water receiving box; 34. Water receiving pipe; 35. Connecting pipe; 36. Water storage pipe; 38. First fixing plate; 39. Second motor; 310. First gear; 311. Second gear; 312. Push plate; 313. Second screw rod; 314. Limiting rod; 315. Push rod. DETAILED DESCRIPTION

[0015] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0016] The technical solutions provided by various embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0017] Reference Figures 1 to 6 As shown, an embodiment of the present invention provides a mine geological disaster early warning device, including an early warning component 1, a cleaning component 2 and a water supply component 3; The warning assembly 1 includes a support rod 11, which supports the entire structure and provides a stable foundation for the device. A bracket 14 is fixedly mounted on the support rod 11, and two sets of inclined rods 15 are provided on the bracket 14. Solar panels 16 are fixedly mounted on the two sets of inclined rods 15. The bracket 14 and the inclined rods 15 form a stable support structure, so that the solar panels 16 can face the sunlight at a suitable angle to improve the efficiency of light energy collection. At the same time, a battery is fixedly mounted on the back of the solar panel 16. The solar panel 16 and the battery are electrically connected through wires to achieve the transmission and storage of electrical energy. A control box 17 is fixedly mounted on the bracket 14. The control box 17 is electrically connected to the battery and the solar panel 16. When exposed to sunlight, the solar panel 16 converts solar energy into electricity through the photoelectric effect. Some of this energy is directly used by the equipment within the control box 17, while the remaining energy is stored in a battery on the back. When sunlight is insufficient (e.g., at night or on cloudy days), the battery powers the control box 17 and other electrical components, maintaining normal operation of the geological disaster warning device.

[0018] The control box 17 manages and regulates electrical energy. It monitors the power generation status of the solar panels 16 and the battery charge level. Through internal circuits and control programs, it rationally distributes and manages electrical energy. For example, it controls the process of charging the battery from the solar panels 16 to avoid overcharging or over-discharging, ensuring stable and efficient operation of the entire power supply system.

[0019] A top plate 12 is fixedly mounted on one end of the support rod 11, and a rain sensor 13 is fixedly mounted on this top plate 12. This rain sensor 13 is conventional and will not be described in detail here. This rain sensor 13 is connected to the data acquisition module in the control box 17 via a waterproof cable. This cable is made of anti-aging and bend-resistant material and is covered with a waterproof casing. It is laid along the inside or side of the support rod 11 and is equipped with a waterproof connector before entering the control box 17 to further enhance the waterproof performance and ensure that the data collected by the sensor can be stably and reliably transmitted to the control box 17 for processing and analysis.

[0020] The cleaning assembly 2 includes a mounting cover 21 fixedly mounted on the solar panel 16 near a side position, with side covers 22 installed on both sides of the mounting cover 21 in communication, and a movable unit 1 installed inside a set of side covers 22, the movable unit 1 including a first concave plate 23 fixedly mounted inside the set of side covers 22, a first screw rod 24 bearing mounted inside the first concave plate 23, and a first sliding seat (not shown in the figure) threadedly connected to the first screw rod 24; Two sets of first guide rods 25 are fixedly mounted on the first concave plate 23. The first sliding seat slides on the two sets of first guide rods 25 at the same time. A first motor 26 is fixedly mounted on one end of the first concave plate 23. The first motor 26 is electrically connected to the control box 17. The output end of the first motor 26 is connected to the first screw rod 24. The first screw rod 24 is adapted to rotate along with the output end of the first motor 26. Meanwhile, a second movable unit is fixedly mounted in another set of side covers 22. The second movable unit includes a second concave plate 28 fixedly mounted in the side cover 22. Two sets of second guide rods 29 are mounted on bearings in the second concave plate 28. A second sliding seat 210 is slidably sleeved on the second guide rods 29. A cleaning brush 27 is connected between the second sliding seat 210 and the first sliding seat. When the control box 17 receives a command to activate the cleaning assembly 2 (e.g., when the scheduled cleaning timer expires), it supplies power to the first motor 26. Once energized, the output end of the first motor 26 begins to rotate, converting electrical energy into mechanical energy. Because the output end of the first motor 26 is connected to the first screw rod 24, the first screw rod 24 rotates synchronously with the output end of the first motor 26.

[0021] When the first screw rod 24 rotates, the first sliding seat, which is threadedly connected to the first screw rod 24, moves along the axial direction of the first screw rod 24 under the action of the threaded transmission. At the same time, the first sliding seat is sleeved on two sets of first guide rods 25. The first guide rods 25 serve as a guide and support, limiting the movement of the first sliding seat to a linear direction, preventing the first sliding seat from deflecting or rotating during movement, and ensuring the stability and accuracy of movement.

[0022] A cleaning brush 27 is connected between the first and second sliding seats 210. When the first sliding seat moves, the cleaning brush 27 drives the second sliding seat 210 to move synchronously. The second sliding seat 210 slides over two sets of second guide rods 29 within the second concave plate 28. The second guide rods 29 also serve as guides, ensuring smooth movement of the second sliding seat 210. Driven by the first and second sliding seats 210, the cleaning brush 27 reciprocates along the sides of the solar panel 16, cleaning dirt such as dust, fallen leaves, and bird droppings from the surface of the solar panel 16.

[0023] During movement, the bristles of the cleaning brush 27 come into close contact with the surface of the solar panel 16, removing dirt from the surface of the solar panel 16 through physical friction, thereby keeping the solar panel 16 clean. This ensures that the solar panel 16 receives sunlight more efficiently and improves power generation efficiency. When the first motor 26 reverses, the first sliding base moves in the opposite direction, and the cleaning brush 27 cleans the surface of the solar panel 16 again, ensuring that every corner is cleaned.

[0024] Reference Figures 4 to 6 As shown, specifically, the water supply assembly 3 includes a fixing sleeve 31 fixedly mounted on the support rod 11, a bracket plate 32 fixedly mounted on the fixing sleeve 31, and a water receiving box 33 supported and fixed on the bracket plate 32. The water receiving box 33 is suitable for receiving rainwater, and there is a certain gap between the water receiving box 33 and the bracket plate 32; A water receiving pipe 34 is installed on the bottom surface of the water receiving box 33. The water receiving pipe 34 is suitable for discharging the water received by the water receiving box 33. A squeezing unit is installed on the support frame 14. The squeezing unit includes a water storage pipe 36 fixedly installed on the support frame 14. At the same time, a connecting pipe 35 is connected to the water receiving pipe 34. The connecting pipe 35 is connected to the water storage pipe 36. The connecting pipe 35 is suitable for collecting the water collected in the water receiving box 33 into the water storage pipe 36. At the same time, a first fixing plate 38 is fixedly mounted on the support frame 14. A second motor 39 is fixedly mounted on the side of the first fixing plate 38. The second motor 39 is electrically connected to the control box 17, and a first gear 310 is fixedly mounted on the output end of the second motor 39. At the same time, a second fixing plate (not shown in the figure) is fixedly mounted on one end of the water storage pipe 36. A second screw rod 313 is mounted on a bearing between the first fixing plate 38 and the second fixing plate. At the same time, a second gear 311 is fixedly mounted on the second screw rod 313 near one end, and the second gear 311 is meshed with the first gear 310. The second motor 39 is adapted to be started to drive the first gear 310 to rotate, the first gear 310 is adapted to drive the second gear 311 to rotate, and the second gear 311 is adapted to drive the second screw rod 313 to rotate; A push plate 312 is threadedly connected to the second screw rod 313. A limiting rod 314 is fixedly installed between the first fixing plate 38 and the second fixing plate. The push plate 312 is movably sleeved on the limiting rod 314. A push rod 315 is fixedly installed on the side of the push rod 315. One end of the push rod 315 has a piston. In the initial state, the piston is located in the water storage pipe 36 at one end near the second motor 39. It should be noted that the cleaning brush 27 is a hollow tubular structure with multiple groups of leak holes formed on it. A hose 211 is connected to one end of the cleaning brush 27. The hose 211 passes through the second sliding seat 310 and the second concave plate 28 in sequence. A long groove (not shown) is formed on the second concave plate 28 for the hose 211 to move. One end of the hose 211 is connected to the end of the water storage pipe 36 away from the second motor 39. When control box 17 issues a start command, second motor 39, electrically connected to control box 17, begins to operate, its output driving first gear 310 to rotate. First gear 310 meshes with second gear 311, driving second gear 311 to rotate synchronously. Since second gear 311 is fixedly mounted on second screw 313, second screw 313 also begins to rotate. The rotation of second screw 313 causes push plate 312, threadedly connected to it, to move along the axial direction of second screw 313, guided by restraining rod 314. Push plate 312, via push rod 315, drives a piston within water pipe 36 from one end near second motor 39 to the other, squeezing water out of water pipe 36. The pressurized water flows through hose 211 into hollow cleaning brush 27, where it is evenly sprayed onto the surface of solar panel 16 through multiple holes in cleaning brush 27. Combined with the physical wiping of cleaning brush 27, this effectively rinses and cleans solar panel 16. After cleaning is completed, the second motor 39 rotates in reverse, driving the piston to return to the initial position, and the water storage pipe 36 is filled with water again, preparing for the next cleaning.

[0025] Specifically, a filter is fixedly mounted near the opening of the water receiving box 33. This filter is suitable for filtering rainwater. When rainfall occurs, rainwater directly falls into the water receiving box 33 and first comes into contact with the filter. The filter is typically made of a material with fine pores (such as stainless steel mesh, nylon mesh, etc.), which can effectively intercept impurities in the rainwater, preventing these impurities from entering the water receiving box 33 and achieving filtration.

[0026] Specifically, a liquid level sensor is provided on the inner wall of the water receiving box 33, and the liquid level sensor is used to sense the amount of rainwater collected in the water receiving box 33, and the liquid level sensor is electrically connected to the control box 17; As rainwater continues to fall into the water collection box 33, the water level gradually rises. The liquid level sensor transmits the calculated liquid level data in the form of an electrical signal via a wire to the control box 17. The control box 17 analyzes and processes the received data, recording changes in the amount of rainwater in an internal storage module. When the liquid level falls below a preset minimum threshold, the control box 17 controls related equipment to suspend the use of rainwater in the water collection box 33. The liquid level sensor and the control box 17 work together to achieve automated and intelligent management of rainwater collection and use, ensuring the stable operation of the relevant functions of the geological disaster early warning device.

[0027] Specifically, a valve is installed at the connection point between the connecting pipe 35 and the water storage pipe 36. This valve is electrically connected to the control box 17. A position sensor is installed on the inner wall of the water storage pipe 36 to monitor the position of the piston in real time. When the piston moves past the critical point of the valve, the sensor sends a signal to the control box 17. When the control box 17 determines that the piston has passed the valve and begins to squeeze the rainwater, it sends a closing command to the valve. At this time, the pressure generated by the forward movement of the piston forces the rainwater to flow only through the hose 211 to the cleaning brush 27, ensuring efficient cleaning. When the piston completes its cleaning stroke and begins to reset, the control box 17 detects that the piston is about to return to its initial position and sends an opening command to the valve. After the valve is opened, the rainwater in the water receiving box 33 flows into the water storage pipe 36 through the connecting pipe 35 under the action of gravity or siphon, completing the water storage and replenishment.

[0028] In summary, the stable structure created by support rods 11, support frames 14, and diagonal rods 15 allows solar panels 16 to receive sunlight at an optimal angle. The solar energy is converted into electricity through the photoelectric effect. A portion of this energy is directly used to power equipment such as the control box 17, while the remaining energy is stored in batteries for backup. The control box 17 ensures stable power distribution through intelligent management. A rain sensor 13 on the roof 12 monitors rainfall in real time and transmits this data to the control box 17 via waterproof cables, providing key parameters for geological disaster warnings.

[0029] Cleaning assembly 2 is activated under the command of control box 17. First motor 26 drives first screw 24 to rotate, driving cleaning brush 27 to move back and forth along the surface of solar panel 16, removing dirt through friction of bristles. Water supply assembly 3 works in conjunction with water receiving box 33: rainwater is filtered through a filter and stored in water storage pipe 36. Control box 17 activates second motor 39, which drives piston to squeeze water in water storage pipe 36 through gear transmission. Pressurized water flows through hose 211 and sprays out from the leakage hole of cleaning brush 27, combined with physical wiping to achieve flushing. The valve at the connection between connecting pipe 35 and water storage pipe 36 is intelligently controlled by control box 17. It closes when the piston is squeezed to ensure water pressure and opens when it is reset to replenish water. The liquid level sensor in water receiving box 33 monitors the water level in real time, and the control box 17 is linked to optimize the efficiency of rainwater utilization.

[0030] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, make some changes or modifications to equivalent embodiments using the technical contents disclosed above. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A mine geological disaster early warning device, comprising a support rod (11) and a cleaning assembly (2), wherein a bracket (14) is mounted on the support rod (11), the bracket (14) has two groups of inclined rods (15), solar panels (16) are mounted on the two groups of inclined rods (15), and a control box (17) is mounted on the bracket (14), characterized in that: The cleaning assembly (2) comprises a mounting cover (21) mounted on the solar panel (16), side covers (22) are connected and mounted on both sides of the mounting cover (21), a first moving unit is mounted inside one set of side covers (22), the first moving unit comprises a first sliding seat adapted to slide along the straight direction of the side cover (22); a second moving unit is mounted inside one set of side covers (22), the second moving unit comprises a second sliding seat (210) adapted to slide along the straight direction of the side cover (22), a cleaning brush (27) is connected between the second sliding seat (210) and the first sliding seat, the cleaning brush (27) is a hollow tubular structure, a plurality of leaking holes are provided on the cleaning brush (27), and the cleaning brush (27) is connected to the water storage pipe through a hose (211). (36) is connected; a water supply assembly (3), the water supply assembly (3) comprising a fixing sleeve (31) mounted on the support rod (11), a bracket plate (32) mounted on the fixing sleeve (31), a water receiving box (33) mounted on the bracket plate (32), a water receiving pipe (34) mounted on the bottom surface of the water receiving box (33), an extrusion unit mounted on the bracket (14), the extrusion unit comprising a water storage pipe (36) for storing rainwater, and a push rod (315) suitable for squeezing rainwater in the water storage pipe (36), one end of the push rod (315) having a piston, one end of the hose (211) being connected to the water storage pipe (36), a connecting pipe (35) being connected to the water receiving pipe (34), and the connecting pipe (35) being connected to the water storage pipe (36).

2. The mine geological disaster early warning device according to claim 1, characterized in that: There is a certain gap between the water receiving box (33) and the bracket plate (32), the water storage pipe (36) is installed on the bracket (14), a first fixing plate (38) is installed on the bracket (14), a second motor (39) is installed on the side of the first fixing plate (38), the second motor (39) is electrically connected to the control box (17), a first gear (310) is installed on the output end of the second motor (39), a second fixing plate is installed at one end of the water storage pipe (36), and a second screw rod (313) is installed in a bearing between the first fixing plate (38) and the second fixing plate A second gear (311) is installed near one end of the second screw rod (313), and the second gear (311) is engaged with the first gear (310); a push plate (312) is threadedly connected to the second screw rod (313), a limiting rod (314) is installed between the first fixed plate (38) and the second fixed plate, and the push plate (312) is movably sleeved on the limiting rod (314), and the push rod (315) is installed on the side of the push rod (315). In the initial state, the piston is located in the water storage pipe (36) near one end of the second motor (39).

3. The mine geological disaster early warning device according to claim 2, characterized in that: The mobile unit 1 also includes a first concave plate (23) installed in a group of the side covers (22), a first screw rod (24) is installed in a bearing in the first concave plate (23), a first sliding seat is threadedly connected to the first screw rod (24), two groups of first guide rods (25) are installed on the first concave plate (23), and the first sliding seat slides on the two groups of first guide rods (25) at the same time, a first motor (26) is installed at one end of the first concave plate (23), the first motor (26) is electrically connected to the control box (17), and the output end of the first motor (26) is connected to the first screw rod (24); the mobile unit 2 also includes a second concave plate (28) installed in the side cover (22), two groups of second guide rods (29) are installed in a bearing in the second concave plate (28), and the second sliding seat (210) is slidably sleeved on the second guide rod (29).

4. The mine geological disaster early warning device according to claim 3, characterized in that: A filter is fixedly installed on the water receiving box (33) near the opening.

5. The mine geological disaster early warning device according to claim 4, characterized in that: The inner wall of the water receiving box (33) is provided with a liquid level sensor.

6. The mine geological disaster early warning device according to claim 3, characterized in that: A valve is provided at the connection point between the connecting pipe (35) and the water storage pipe (36), the valve is electrically connected to the control box (17), and a position sensor is installed on the inner wall of the water storage pipe (36).

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