Intelligent low-voltage distribution network inspection instrument device

Abstract

The invention discloses an intelligent low-voltage distribution network itinerant detector device, and relates to the technical field of electrical equipment detection, and the intelligent low-voltage distribution network itinerant detector device comprises a portable frame which is used for being placed on the ground; the cover plate is rotationally mounted on the rear side of the portable frame; the instrument body is arranged in the portable frame; the portable handle is arranged on the front side of the portable frame; the charging port is formed in the top of the instrument body, and the charging port is used for charging the instrument body; the test key is arranged at the top of the instrument body, and the test key is electrically connected with the instrument body; the protection plate moves in the direction close to the sealing block to reset to make contact with the sensor aviation plug and fasten and limit the sensor aviation plug, the aviation plug is fastened and limited, it can be ensured that connection between the aviation plug and the aviation socket is firmer and more stable, and the stability and reliability of instrument body inspection are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical equipment detection, in particular to an intelligent low-voltage distribution network inspection instrument device. Background Art

[0002] The intelligent low-voltage distribution network inspection instrument device usually consists of a sensor, an instrument body, an aviation socket, an aviation plug, a portable frame and a switch.

[0003] Patent announcement number CN110632450B relates to an intelligent low-voltage distribution network inspection instrument device, including a main body, a controller, a communication module, an ammeter, and an operating lever. The main body is provided with a fixed clamp, a movable clamp, and a clamp handle for driving the movable clamp to rotate. A support rod is provided on the side of the main body near the fixed clamp and the movable clamp. The top of the support rod is connected to an externally threaded rod, and an internally threaded sleeve is threadedly connected to the externally threaded rod. The end of the internally threaded sleeve away from the support rod is rotatably connected to an adjustment rod. The adjustment rod is provided with an adjustment hole for matching with the externally threaded rod. The end of the adjustment rod away from the internally threaded sleeve is provided with an elastic limiter for connecting to the measured conductor. This patent can facilitate the adjustment of the measured conductor to the center position of the jaws, especially when measuring high-altitude lines. It can also facilitate the adjustment of the measured conductor's measurement position, resulting in a smaller measurement error.

[0004] In the above patent, it is easy to adjust the measured wire to the center position of the jaws, especially when measuring high lines, it is also easy to adjust the measurement position of the measured wire, so that the measurement error is smaller, but it is difficult to ensure the sealing between the aviation plug and the aviation socket. Poor sealing between the plug and the socket will cause mechanical looseness between the aviation plug and the aviation socket, thereby affecting the normal inspection of the inspection instrument. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the present invention provides an intelligent low-voltage distribution network inspection instrument device, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: an intelligent low-voltage distribution network inspection instrument device, comprising: a portable frame, the portable frame is used to be placed on the ground; a cover plate, the cover plate is rotatably mounted on the rear side of the portable frame; an instrument body, the instrument body is arranged inside the portable frame; a portable handle, the portable handle is arranged on the front side of the portable frame; a charging port, the charging port is arranged on the top of the instrument body, the charging port is used to charge the instrument body; a test button, the test button is arranged on the top of the instrument body, the test button is electrically connected to the instrument body; the aviation socket, the The aviation socket is arranged on the top of the instrument body; the protective frame is fixedly installed on the top of the instrument body; the L-shaped rod is fixedly installed on the right side of the protective frame; the protective plate is slidably installed on the circumferential surface of the L-shaped rod, and the protective plate passes through the right side of the protective frame; the placement rack is fixedly installed on the front side of the protective frame; the elastic telescopic rod is fixedly passed through the front side of the placement rack; the sealing block is fixedly installed on the inner wall of the protective frame, and the protective plate moves toward the sealing block to reset and contact the sensor aviation plug and tighten the sensor aviation plug to limit it.

[0007] According to the above technical solution, the rear side of the free end of the elastic telescopic rod is set as a slope, the free end of the elastic telescopic rod passes through the front side of the protective frame, and a No. 1 spring is set between the protective plate and the protective frame. The No. 1 spring can drive the protective plate to reset, and the protective plate moves away from the sealing block to break away from the contact with the sealing block and release the obstruction to the aviation socket.

[0008] According to the above technical solution, a linkage rod is fixedly installed on the right side of the protective plate, an L-shaped groove is opened on the top of the instrument body, a switch is provided at the bottom of the inner wall of the L-shaped groove, and the switch is electrically connected to the instrument body. The protective plate is limited by the free end of the elastic telescopic rod to ensure that a stable fastening force is applied to the sensor aviation plug.

[0009] According to the above technical solution, a protective component for preventing the cover from tipping over is provided on the inner wall of the portable frame, and a control component is provided on the top of the instrument body. The protective component includes a connecting rod, a connecting plate, a T-shaped plate, a connecting spring and a connecting groove. The cover cannot be closed during the testing of the instrument body due to the limitation of the T-shaped plate. The connecting rod is fixedly installed on the top of the instrument body, the connecting plate is fixedly installed on the top of the connecting rod, the T-shaped plate is slidably installed on the circumferential surface of the connecting rod, the connecting spring is arranged between the T-shaped plate and the instrument body, and the connecting groove is opened on the inner wall of the portable frame.

[0010] According to the above technical solution, a protective block is fixedly installed at the bottom of the protective plate. The protective block is elastic. The T-shaped plate contacts the inner wall of the connecting groove. The protective block slowly deforms so that the protective plate slowly moves to tighten and limit the sensor aviation plug.

[0011] According to the above technical solution, the front side of the T-shaped plate is set as a slope, the linkage rod moves to contact the slope of the front side of the T-shaped plate and squeeze the T-shaped plate, the T-shaped plate conflicts with the linkage rod, and a linkage groove is opened on the top of the front side of the T-shaped plate.

[0012] According to the above technical solution, the control component includes an L-shaped tube, piston rod 1, piston rod 2 and a return spring. Piston rod 2 moves backward to break away from contact with the switch and releases the limit on the switch. The L-shaped tube is fixedly installed on the inner wall of the L-shaped groove, the piston rod 1 is slidably installed on the inner wall of the L-shaped tube, and the piston rod 2 is slidably installed on the inner wall of the L-shaped tube. The return spring is arranged between the L-shaped tube and piston rod 1, and replenishing liquid is arranged inside the L-shaped tube.

[0013] According to the above technical solution, the top of the piston rod 1 contacts the T-shaped plate, and the piston rod 2 contacts the switch. The piston rod 2 is squeezed by the replenishing liquid inside the L-shaped tube and moves forward to restore the limit of the switch. A moving groove is opened on the circumferential surface of the L-shaped tube.

[0014] The present invention provides an intelligent low-voltage distribution network inspection device. It has the following beneficial effects: (1) The intelligent low-voltage distribution network inspection instrument device moves the protective plate toward the sealing block to reset the contact with the sensor aviation plug and tighten and limit the sensor aviation plug. By tightening and limiting the aviation plug, the connection between the aviation plug and the aviation socket can be ensured to be more firm and stable, thereby reducing signal interruption or error caused by poor connection or poor contact, and improving the stability and reliability of the instrument body inspection. The aviation socket can be sealed by the protective plate and the sealing block to reduce the contact between the aviation socket and the external environment, which can avoid problems such as poor contact and oxidation, and further ensure the accurate detection of the instrument body.

[0015] (2) The intelligent low-voltage distribution network inspection instrument device ensures that a stable fastening force is applied to the sensor aviation plug by limiting the free end of the elastic telescopic rod on the protective plate. The elastic telescopic rod helps to ensure that the connection between the aviation plug and the aviation socket is consistent, avoiding damage to the aviation plug caused by the continuous squeezing force of the protective plate.

[0016] (3) The intelligent low-voltage distribution network inspection instrument device cannot be closed during the instrument body test because the cover is limited by the T-shaped plate. The T-shaped plate limit design ensures that the cover cannot be completely closed during the test process, which can prevent the cover from accidentally tipping over, thereby protecting the wiring part of the instrument body from external impact.

[0017] (4) The intelligent low-voltage distribution network inspection instrument device can tighten and limit the aviation plug by slowly deforming the protective block so that the protective plate moves slowly, thereby avoiding the instantaneous impact force caused by rapid tightening, thereby reducing damage to the connection between the aviation plug and the aviation socket.

[0018] (5) The intelligent low-voltage distribution network inspection instrument device moves backwards due to the negative pressure inside the L-shaped tube. The piston rod moves backwards to break away from the contact with the switch and release the limit on the switch. By avoiding pressing the switch to power on when the connection is unstable, the normal operation of the instrument body can be ensured and accurate and reliable detection data can be obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the portable frame of the present invention; Figure 3 For the present invention Figure 2 A schematic diagram of the structure of part A in the middle; Figure 4 For the present invention Figure 2 A magnified schematic diagram of the structure of part B; Figure 5 This is a schematic diagram of the internal structure of the protective frame of the present invention; Figure 6 This is a schematic diagram of a half-section structure of the protective frame of the present invention; Figure 7 It is a schematic diagram of the half-section structure of the L-shaped tube of the present invention.

[0020] In the figure: 1. Portable frame; 2. Cover; 3. Instrument body; 4. Portable handle; 5. Charging port; 6. Test button; 7. Aviation socket; 8. Protective frame; 9. L-shaped rod; 10. Protective plate; 11. Placement rack; 12. Elastic telescopic rod; 13. Sealing block; 14. Linkage rod; 151. Connecting rod; 152. Connecting plate; 153. T-shaped plate; 154. Connecting spring; 155. Connecting groove; 156. Protective block; 157. Linkage groove; 161. L-shaped groove; 162. L-shaped tube; 163. Piston rod 1; 164. Piston rod 2; 165. Switch; 166. Reset spring; 167. Moving groove. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] See also Figures 1-6 One embodiment of the present invention is: an intelligent low-voltage distribution network inspection instrument device, comprising: a portable frame 1, the portable frame 1 is used to be placed on the ground; a cover plate 2, the cover plate 2 is rotatably mounted on the rear side of the portable frame 1; an instrument body 3, the instrument body 3 is arranged inside the portable frame 1; a portable handle 4, the portable handle 4 is arranged on the front side of the portable frame 1; a charging port 5, the charging port 5 is arranged on the top of the instrument body 3, and the charging port 5 is used to charge the instrument body 3; a test key 6, the test key 6 is arranged on the top of the instrument body 3, and the test key 6 is electrically connected to the instrument body 3; an aviation socket 7, the aviation socket 7 is arranged on the top of the instrument body 3; a protective frame 8, the protective frame 8 is fixedly mounted on the top of the instrument body 3; an L-shaped rod 9, the L-shaped rod 9 is fixedly mounted on the right side of the protective frame 8 ; Protective plate 10, the protective plate 10 is slidably installed on the circumferential surface of the L-shaped rod 9, and the protective plate 10 passes through the right side of the protective frame 8; the placement rack 11, the placement rack 11 is fixedly installed on the front side of the protective frame 8; the elastic telescopic rod 12, the elastic telescopic rod 12 is fixedly passed through the front side of the placement rack 11; the sealing block 13, the sealing block 13 is fixedly installed on the inner wall of the protective frame 8. By tightening and limiting the aviation plug, the connection between the aviation plug and the aviation socket 7 can be ensured to be more firm and stable, thereby reducing signal interruption or error caused by poor connection or poor contact, and improving the stability and reliability of the inspection of the instrument body 3. By directly clamping the sensor on the pole, the leakage current characteristic waveform is collected, and wavelet analysis is used to predict early hidden dangers of the line, so as to achieve early detection and early treatment.

[0023] The rear side of the free end of the elastic telescopic rod 12 is set as an inclined surface, and the free end of the elastic telescopic rod 12 passes through the front side of the protective frame 8. A No. 1 spring is set between the protective plate 10 and the protective frame 8. The No. 1 spring can drive the protective plate 10 to reset, and the protective plate 10 moves away from the sealing block 13 to break away from the contact with the sealing block 13 and release the shielding of the aviation socket 7. The aviation socket 7 can be sealed by the protective plate 10 and the sealing block 13, thereby reducing the contact between the aviation socket 7 and the external environment, avoiding problems such as poor contact and oxidation, and further ensuring the accurate detection of the instrument body 3.

[0024] A linkage rod 14 is fixedly installed on the right side of the protective plate 10. An L-shaped groove 161 is provided on the top of the instrument body 3. A switch 165 is provided at the bottom of the inner wall of the L-shaped groove 161. The switch 165 is electrically connected to the instrument body 3. The protective plate 10 is limited by the free end of the elastic telescopic rod 12 to ensure that a stable fastening force is applied to the sensor aviation plug. The elastic telescopic rod 12 helps to ensure that the connection between the aviation plug and the aviation socket 7 is consistent, thereby avoiding damage to the aviation plug caused by the continuous squeezing force of the protective plate 10.

[0025] When this embodiment is working: put the portable frame 1 and the instrument body 3 at a suitable position away from the pole, wrap the sensor around the pole and lock the clamp, manually push the protective plate 10 to move in the direction away from the sealing block 13, and the protective plate 10 moves in the direction away from the sealing block 13 to pull the No. 1 spring. The No. 1 spring is pulled by the protective plate 10 and deforms and stores force. At the same time, the protective plate 10 moves in the direction away from the sealing block 13 to break away from the contact with the sealing block 13 and release the shielding of the aviation socket 7. After the shielding of the aviation socket 7 is released, connect the sensor aviation plug to the aviation socket 7, and at the same time loosen the protective plate 10 so that the protective plate 10 moves back to the direction close to the sealing block 13 under the elastic force of the No. 1 spring. The protective plate 10 moves toward the direction close to the sealing block 13 and resets to contact the sensor aviation plug and tighten the sensor aviation plug. At the same time, the protective plate 10 moves toward the direction close to the sealing block 13 and resets to contact the free end of the elastic telescopic rod 12. The free end of the elastic telescopic rod 12 contacts the protective plate 10 and limits the protective plate 10. The protective plate 10 is limited by the free end of the elastic telescopic rod 12 to ensure that a stable tightening force is applied to the sensor aviation plug. After the sensor aviation plug is firmly connected to the aviation socket 7, select the corresponding gear and turn on the switch 165 of the instrument body 3. After sixty seconds, the instrument body 3 displays the line detection result, and displays the line characteristic waveform voice broadcast and automatically stores it.

[0026] See also Figure 1-Figure 7 On the basis of the above embodiment, in another embodiment of the present invention, a protective component for preventing the cover 2 from tipping over is provided on the inner wall of the portable frame 1, and a control component is provided on the top of the instrument body 3. The protective component includes a connecting rod 151, a connecting plate 152, a T-shaped plate 153, a connecting spring 154 and a connecting groove 155. The connecting rod 151 is fixedly mounted on the top of the instrument body 3, the connecting plate 152 is fixedly mounted on the top of the connecting rod 151, the T-shaped plate 153 is slidably mounted on the circumferential surface of the connecting rod 151, the connecting spring 154 is arranged between the T-shaped plate 153 and the instrument body 3, and the connecting groove 155 is opened on the inner wall of the portable frame 1. The limiting design of the T-shaped plate 153 ensures that the cover 2 cannot be completely closed during the test, which can prevent the cover 2 from accidentally tipping over, thereby protecting the wiring part of the instrument body 3 from external impact.

[0027] A protective block 156 is fixedly installed at the bottom of the protective plate 10. The protective block 156 is elastic. The T-shaped plate 153 contacts the inner wall of the connecting groove 155. The protective block 156 deforms slowly, causing the protective plate 10 to move slowly to tighten and limit the sensor aviation plug. The protective plate 10 moves slowly to tighten and limit the aviation plug, thereby avoiding the instantaneous impact force caused by rapid tightening, thereby reducing damage to the connection between the aviation plug and the aviation socket 7.

[0028] The front side of the T-shaped plate 153 is set as an inclined surface, and the linkage rod 14 moves to contact the inclined surface on the front side of the T-shaped plate 153 and squeeze the T-shaped plate 153. The T-shaped plate 153 conflicts with the linkage rod 14, and a linkage groove 157 is opened on the top of the front side of the T-shaped plate 153.

[0029] The control component includes an L-shaped tube 162, piston rod 1 163, piston rod 2 164 and a return spring 166. The L-shaped tube 162 is fixedly installed on the inner wall of the L-shaped groove 161, piston rod 1 163 is slidably installed on the inner wall of the L-shaped tube 162, piston rod 2 164 is slidably installed on the inner wall of the L-shaped tube 162, and the return spring 166 is arranged between the L-shaped tube 162 and piston rod 1 163. Supplementary fluid is provided inside the L-shaped tube 162. By avoiding pressing the switch 165 to power on when the connection is unstable, the normal operation of the instrument body 3 can be ensured and accurate and reliable detection data can be obtained.

[0030] The top of piston rod 163 contacts the T-shaped plate 153, and piston rod 2 164 contacts the switch 165. Piston rod 2 164 is squeezed by the replenishing liquid inside the L-shaped tube 162 and moves forward to restore the limit of switch 165. A moving groove 167 is opened on the circumferential surface of the L-shaped tube 162.

[0031] When this embodiment is working, the protective plate 10 moves in the direction away from the sealing block 13, driving the linkage rod 14 to move. The linkage rod 14 moves and contacts the inclined surface on the front side of the T-shaped plate 153 and squeezes the T-shaped plate 153. The T-shaped plate 153 moves upward under the squeezing of the linkage rod 14. The T-shaped plate 153 moves upward to pull the connecting spring 154. The connecting spring 154 is pulled by the T-shaped plate 153 to produce deformation and accumulate force. At the same time, the T-shaped plate 153 moves upward to limit the cover plate 2. The cover plate 2 is limited by the T-shaped plate 153. During the test of the instrument body 3, it cannot be closed. At the same time, when the protective plate 10 moves toward the direction close to the sealing block 13 to reset, the protective plate 10 moves toward the direction close to the sealing block 13, driving the protective block 156 to move. The protective block 156 moves toward the direction close to the sealing block 13 and contacts the bottom right side of the protective frame 8 and squeezes the bottom right side of the protective frame 8. The protective block 156 is slowly deformed by the reaction force of squeezing the protective frame 8. The slow deformation of the protective block 156 causes the protective plate 10 to move slowly to tighten and limit the sensor aviation plug.

[0032] The T-shaped plate 153 moves upward and contacts the piston rod 163 and squeezes the piston rod 163. The piston rod 163 is squeezed by the T-shaped plate 153 and moves upward. The piston rod 163 moves upward to pull the return spring 166. The return spring 166 is pulled by the piston rod 163 to deform and store force. At the same time, the piston rod 163 moves upward to suck the replenishing liquid inside the L-shaped tube 162. The replenishing liquid inside the L-shaped tube 162 is sucked by the piston rod 163, so that negative pressure is generated inside the L-shaped tube 162. The piston rod 2 164 is affected by the negative pressure inside the L-shaped tube 162 and moves backward. The piston rod 2 164 moves backward to break away from the contact with the switch 165 and releases the limit on the switch 165. After the detection of the instrument body 3 is completed, the T-shaped plate 153 moves downward and resets under the elastic force of the connecting spring 154. The T-shaped plate 153 moves downward and resets to disengage from the contact with the piston rod 163. After the piston rod 163 is disengaged from the contact with the T-shaped plate 153, the piston rod 163 moves downward and resets under the elastic force of the reset spring 166. The piston rod 163 moves downward to squeeze the replenishing liquid inside the L-shaped tube 162. The replenishing liquid inside the L-shaped tube 162 is squeezed downward by the piston rod 163. The replenishing liquid inside the L-shaped tube 162 moves downward to squeeze the piston rod 2 164. The piston rod 2 164 is squeezed by the replenishing liquid inside the L-shaped tube 162 and moves forward to restore the limit of the switch 165.

[0033] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An intelligent low-voltage distribution network inspection device, characterized in that: include: A portable frame (1), the portable frame (1) being used for being placed on the ground; A cover plate (2), the cover plate (2) being rotatably mounted on the rear side of the portable frame (1); An instrument body (3), the instrument body (3) being arranged inside the portable frame (1); A portable handle (4), the portable handle (4) being arranged on the front side of the portable frame (1); A charging port (5), the charging port (5) being arranged on the top of the instrument body (3), and the charging port (5) being used to charge the instrument body (3); A test key (6), the test key (6) is arranged on the top of the instrument body (3), and the test key (6) is electrically connected to the instrument body (3); An aviation socket (7), the aviation socket (7) being arranged on the top of the instrument body (3); A protective frame (8), the protective frame (8) being fixedly mounted on the top of the instrument body (3); An L-shaped rod (9), the L-shaped rod (9) being fixedly mounted on the right side of the protective frame (8); A protective plate (10), the protective plate (10) being slidably mounted on the circumferential surface of the L-shaped rod (9), the protective plate (10) passing through the right side of the protective frame (8); A placement rack (11), wherein the placement rack (11) is fixedly mounted on the front side of the protection frame (8); An elastic telescopic rod (12), wherein the elastic telescopic rod (12) is fixedly passed through the front side of the placement frame (11); A sealing block (13) is fixedly mounted on the inner wall of the protective frame (8).

2. The intelligent low-voltage distribution network inspection device according to claim 1, characterized in that: The rear side of the free end of the elastic telescopic rod (12) is set as an inclined surface, the free end of the elastic telescopic rod (12) passes through the front side of the protective frame (8), a spring No. 1 is set between the protective plate (10) and the protective frame (8), the inner wall of the portable frame (1) is provided with a protective component for preventing the cover plate (2) from tipping over, and a control component is provided on the top of the instrument body (3).

3. The intelligent low-voltage distribution network inspection device according to claim 2, characterized in that: A linkage rod (14) is fixedly mounted on the right side of the protective plate (10), an L-shaped groove (161) is provided on the top of the instrument body (3), a switch (165) is provided at the bottom of the inner wall of the L-shaped groove (161), and the switch (165) is electrically connected to the instrument body (3).

4. The intelligent low-voltage distribution network inspection device according to claim 3, characterized in that: The protective assembly comprises a connecting rod (151), a connecting plate (152), a T-shaped plate (153), a connecting spring (154) and a connecting groove (155), wherein the connecting rod (151) is fixedly mounted on the top of the instrument body (3), the connecting plate (152) is fixedly mounted on the top of the connecting rod (151), the T-shaped plate (153) is slidably mounted on the circumferential surface of the connecting rod (151), the connecting spring (154) is arranged between the T-shaped plate (153) and the instrument body (3), and the connecting groove (155) is opened on the inner wall of the portable frame (1).

5. The intelligent low-voltage distribution network inspection device according to claim 4, characterized in that: A protection block (156) is fixedly mounted on the bottom of the protection plate (10); the protection block (156) is elastic; and the T-shaped plate (153) contacts the inner wall of the connecting groove (155).

6. The intelligent low-voltage distribution network inspection device according to claim 5, characterized in that: The front side of the T-shaped plate (153) is set as an inclined surface, the T-shaped plate (153) contacts the linkage rod (14), and a linkage groove (157) is opened on the top of the front side of the T-shaped plate (153).

7. The intelligent low-voltage distribution network inspection device according to claim 6, characterized in that: The control assembly includes an L-shaped tube (162), a piston rod 1 (163), a piston rod 2 (164) and a return spring (166), wherein the L-shaped tube (162) is fixedly mounted on the inner wall of the L-shaped groove (161), the piston rod 1 (163) is slidably mounted on the inner wall of the L-shaped tube (162), the piston rod 2 (164) is slidably mounted on the inner wall of the L-shaped tube (162), the return spring (166) is arranged between the L-shaped tube (162) and the piston rod 1 (163), and a replenishing liquid is arranged inside the L-shaped tube (162).

8. The intelligent low-voltage distribution network inspection device according to claim 7, characterized in that: The top of the piston rod 1 (163) contacts the T-shaped plate (153), the piston rod 2 (164) contacts the switch (165), and a movable groove (167) is provided on the circumferential surface of the L-shaped tube (162).

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