A safety detection device for weak current engineering

Abstract

The present invention discloses a safety detection device for a weak current project, including a detection box. A circuit board is installed on the bottom wall of the detection box. The circuit board is electrically connected to two detection probes through wires. Two resistor seats are installed on the circuit board. A push-button type resistor adjustment mechanism is arranged on the detection box. The present invention relates to the technical field of weak current detection devices. With the setting of the push-button type resistor adjustment mechanism in this safety detection device for a weak current project, every time the left push column is pressed once, the contact area between the contact piece and the resistor seat can be increased, so as to reduce the resistance in the circuit where the detection probe is located. Every time the right push column is pressed once, the contact area between the contact piece and the resistor seat can be reduced, so as to increase the resistance in the circuit where the detection probe is located. Furthermore, the purpose of flexibly adjusting the voltage in the detection circuit is achieved, thereby adjusting the detection sensitivity of the detection probe, enabling the detection probe to accurately collect and amplify voltage signals, and further improving the accuracy of detection data.

Description

Technical Field

[0001] The present invention relates to the technical field of weak current detection equipment, and specifically relates to a safety detection equipment for weak current engineering. Background Technique

[0002] Weak current engineering is a classification of power applications. Power applications can be divided into strong current and weak current according to the strength of the power transmission power. The electricity used in buildings and building complexes generally refers to weak current below 220V 50Hz of alternating current, which mainly provides electrical energy to people and converts electrical energy into other forms of energy. During the implementation of power engineering applications, personnel need to detect weak current circuits to ensure that the equipment in the circuit can operate normally, efficiently, and safely.

[0003] The Chinese patent application with the publication number CN209486221U discloses a safety detection device for weak current engineering. This patent provides a safety detection device for weak current engineering, which has a simple structure and is convenient to carry and use. By contacting the weak current circuit with the detection probe, the voltage sensor and the current sensor can quickly and accurately detect the voltage and current data in the circuit. Through the analysis and integration of the analysis and comparison module, it is presented to the PLC controller for adjustment, and the data is displayed on the display. The data abnormal alarm light flashes to give a warning, which brings great convenience to the user. Moreover, according to the needs, the device can be efficiently cooled through the heat dissipation device, and the personnel can carry it conveniently, safely and stably through the carrying structure, which reduces the work burden of the personnel, ensures the high efficiency and use safety of the detection equipment, and improves the use efficiency of the safety detection device for weak current engineering. However, the above patent still has the following deficiencies:

[0004] When calibrating the sensitivity of the voltage detection probe, since there are slight differences in the voltage standards in different regions of weak current engineering, it is necessary to accurately adjust the measurement reference of the detection probe. The above patent lacks effective means to accurately adjust the gain of the voltage detection circuit, resulting in the difficulty for the detection probe to accurately collect and amplify the voltage signal, thereby affecting the accuracy of the detection data.

[0005] Therefore, we propose a safety detection equipment for weak current engineering to solve the above problems. Summary of the Invention

[0006] Aiming at the deficiencies of the prior art, the present invention provides a safety detection equipment for weak current engineering, which solves the problems raised in the background technique.

[0007] To achieve the above object, the present invention is realized through the following technical solutions: A safety detection device for a weak current project, including a detection box, a circuit board is installed on the bottom wall of the detection box, the circuit board is electrically connected to two detection probes through wires, two resistor seats are installed on the circuit board, and a push-type resistor adjustment mechanism is arranged on the detection box, and the push-type resistor adjustment mechanism is used to adjust the detection sensitivity of the detection probes;

[0008] The push-type resistor adjustment mechanism includes two shells fixed in the detection box, a top plate is fixed on the tops of the two shells, a bottom plate is fixed on the bottoms of the two shells, two push columns are slidably connected to the top of the top plate, the bottom ends of the two push columns both extend into the interior of the shell, a first spring is fixed between the bottom ends of the two push columns and the top of the bottom plate, grooves are opened on one side of the two push columns, a pawl is rotatably connected between the inner walls of the grooves through a rotating shaft, a elastic piece is fixed on one side of the inner wall of the groove, one side of the elastic piece is in contact extrusion with one side of the pawl, a first rack is slidably connected to one side of one of the push columns, a slide bar is slidably connected to one side of the other push column, the bottom ends of the first rack and the slide bar both penetrate through the bottom plate and extend to the bottom of the bottom plate, a connecting column is fixed between the bottom ends of the first rack and the slide bar, a contact piece is fixed at the bottom end of the connecting column, a ratchet wheel is rotatably connected in the two shells through a rotating rod, a first gear is fixed on the rotating rod, a second spring is fixed on the top of the bottom plate, and a clamping block is fixed at the top end of the second spring.

[0009] Preferably, both of the two pawls are clamped with the ratchet wheel, the first gear is meshed with the first rack, the top ends of the clamping blocks are clamped with the ratchet wheel, the two sides of the contact piece are slidably connected with the opposite sides of the two resistor seats, and the two resistor seats are electrically connected with the contact piece.

[0010] Preferably, a heat dissipation slot is opened on one side of the detection box, a baffle is rotatably connected between the interiors of the heat dissipation slots through a plurality of vertical rods, fixed blocks are fixed on one side of the plurality of baffles, a connecting rod is arranged above the plurality of fixed blocks, a plurality of squares are fixed on the connecting rod, and the bottoms of the plurality of squares are rotatably connected with the tops of the fixed blocks through pin shafts.

[0011] Preferably, a heat dissipation adjustment component for adjusting the rotation angle of the baffle is arranged on the connecting column, and the heat dissipation adjustment component includes an L-shaped rod fixed on one side of the connecting column, a wedge-shaped block is fixed at the bottom end of the L-shaped rod, a vertical plate is fixed on the top wall of the detection box, and a moving rod is slidably connected to the inner surface of the vertical plate.

[0012] Preferably, a circular plate is fixed to one end of the moving rod. Two side plates are fixed to one side of the circular plate. A roller is rotatably connected between the opposite sides of the two side plates. The outer surface of the roller contacts and presses against the inclined surface of the wedge-shaped block. A third spring is sleeved on the outer surface of the moving rod. One end of the third spring is fixed to one side of the circular plate, and the other end of the third spring is fixed to one side of the vertical plate.

[0013] Preferably, a folding rod is fixed to the top of the moving rod. A second rack is fixed to one end of the folding rod. A second gear is fixed to one of the vertical rods. The second rack meshes with the second gear.

[0014] Preferably, a dust removal unit for wiping and removing dust from the opposite sides of the two blocking seats is provided on the moving rod. The dust removal unit includes a bent rod fixed to one side of the moving rod. A sponge plate is fixed to one end of the bent rod. The two sides of the sponge plate are slidably connected to the opposite sides of the two blocking seats.

[0015] Preferably, a ventilation opening is provided on one side of the detection box. A fan is installed in the ventilation opening. A voltage sensor, a current sensor, and an analysis and comparison module are installed on one side of the inner wall of the detection box. An alarm lamp, a display screen, and a PLC controller are installed on the outer side of the detection box. A handheld handle is fixed to the bottom of the detection box.

[0016] The present invention provides a safety detection device for weak current engineering. Compared with the prior art, it has the following beneficial effects:

[0017] (1) Through the setting of the push-type resistance adjustment mechanism, each time the left push column is pressed, the contact area between the contact piece and the blocking seat can be increased, the resistance in the circuit where the detection probe is located can be reduced, and each time the right push column is pressed, the contact area between the contact piece and the blocking seat can be reduced, the resistance in the circuit where the detection probe is located can be increased, so as to achieve the purpose of flexibly adjusting the voltage in the detection circuit, thereby adjusting the detection sensitivity of the detection probe, enabling the detection probe to accurately collect and amplify the voltage signal, and further improving the accuracy of the detection data.

[0018] (2) Through the setting of the heat dissipation adjustment component, which is linked with the push-type resistance adjustment mechanism, when the connecting column moves downward, due to the reduction of the resistance in the circuit, the generated heat is reduced, the baffle rotates to change the angle and gradually closes, at this time the fan speed is reduced, the air output can be reduced, and the noise can be reduced. When the connecting column moves upward, due to the increase of the resistance in the circuit, more heat is generated. At this time, the baffle rotates and gradually opens. At this time, the fan speed is increased, the air output can be increased, and the heat dissipation speed can be accelerated, achieving the purpose of rapid heat dissipation and noise reduction.

[0019] (3) Through the setting of the dust removal unit, during the movement of the heat dissipation adjustment component, the relative side of the resistance seat is wiped and dusted by the sponge board. When the contact piece moves upward and resets, the sponge board slides into the space between the two resistance seats to also prevent dust, effectively avoiding the phenomenon that external dust adheres to the resistance seat during ventilation, resulting in an increase in resistance. Description of the Drawings

[0020] Figure 1 is a three-dimensional external structure view of the present invention;

[0021] Figure 2 is a three-dimensional internal structure of the present invention Figure 1 ;

[0022] Figure 3 of the present invention Figure 2 is a partial enlarged view of part A in the present invention;

[0023] Figure 4 is a three-dimensional internal structure of the present invention Figure 2 ;

[0024] Figure 5 is an exploded view of the push-button resistance adjustment mechanism of the present invention Figure 1 ;

[0025] Figure 6 of the present invention Figure 5 is a partial enlarged view of part B in the present invention;

[0026] Figure 7 is an exploded view of the push-button resistance adjustment mechanism of the present invention Figure 2 ;

[0027] Figure 8 is a three-dimensional view of the heat dissipation adjustment component and the dust removal unit of the present invention;

[0028] Figure 9 of the present invention Figure 8 is a partial enlarged view of part C in the present invention.

[0029] In the figure: 1. Detection box; 2. Circuit board; 3. Detection probe; 4. Resistance seat; 5. Press-type resistance adjustment mechanism; 6. Heat dissipation slot; 7. Vertical rod; 8. Flap; 9. Fixed block; 10. Connecting rod; 11. Square block; 12. Heat dissipation adjustment component; 13. Dust removal unit; 14. Vent; 15. Fan; 16. Voltage sensor; 17. Current sensor; 18. Analysis and comparison module; 19. Alarm light; 20. Display screen; 21. PLC controller; 22. Handheld handle; 51. Housing; 52. Top plate; 53. Bottom plate; 54. Pressing column; 55. First spring; 56. Groove; 57. Pawl; 58. Elastic sheet; 59. First rack; 510. Slide bar; 511. Connecting column; 512. Contact piece; 513. Rotating rod; 514. Ratchet wheel; 515. First gear; 516. Second spring; 517. Block; 121. L-shaped rod; 122. Wedge block; 123. Vertical plate; 124. Moving rod; 125. Circular plate; 126. Side plate; 127. Roller; 128. Third spring; 129. Folding rod; 1210. Second rack; 1211. Second gear; 131. Bent rod; 132. Sponge plate. Specific embodiments

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] The embodiments of the present invention provide three technical solutions, specifically including the following embodiments:

[0032] Embodiment 1

[0033] Please refer to Figure 1 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , a safety detection device for a weak current project, including a detection box 1. A circuit board 2 is installed on the bottom wall of the detection box 1. A circuit for controlling the operation of the detection probe 3 is provided on the circuit board 2. The circuit board 2 is electrically connected to two detection probes 3 through wires. After the detection probe 3 is started, it can detect the voltage in the weak current circuit to be detected. Two resistance seats 4 are installed on the circuit board 2. The resistance seat 4 is a conductive metal block. A press-type resistance adjustment mechanism 5 is provided on the detection box 1. The press-type resistance adjustment mechanism 5 is used to adjust the detection sensitivity of the detection probe 3;

[0034] The pressing - type resistance adjusting mechanism 5 includes two housings 51 fixed inside the detection box 1. The two housings 51 are combined to form an outer shell. A top plate 52 is fixed to the tops of the two housings 51, and a bottom plate 53 is fixed to the bottoms of the two housings 51. Two pressing columns 54 are slidably connected to the top of the top plate 52. The bottom ends of the two pressing columns 54 extend into the interior of the housings 51. A first spring 55 is fixed between the bottom ends of the two pressing columns 54 and the top of the bottom plate 53. Grooves 56 are formed on one side of each of the two pressing columns 54. A pawl 57 is rotatably connected between the inner walls of the grooves 56 by a rotating shaft. A shrapnel 58 is fixed to one side of the inner wall of the groove 56. The shrapnel 58 can reset the pawl 57. The shrapnel 58 is made of a metal sheet with good elasticity. One side of the shrapnel 58 contacts and presses against one side of the pawl 57. A first rack 59 is slidably connected to one side of one of the pressing columns 54, and a slide bar 510 is slidably connected to one side of the other pressing column 54. The bottom ends of the first rack 59 and the slide bar 510 penetrate through the bottom plate 53 and extend to the bottom of the bottom plate 53. A connecting column 511 is fixed between the bottom ends of the first rack 59 and the slide bar 510. A contact piece 512 is fixed to the bottom end of the connecting column 511. The contact piece 512 is a conductive metal sheet. A ratchet wheel 514 is rotatably connected inside the two housings 51 by a rotating rod 513. A first gear 515 is fixed to the rotating rod 513. A second spring 516 is fixed to the top of the bottom plate 53, and a latch 517 is fixed to the top end of the second spring 516.

[0035] Both pawls 57 are engaged with the ratchet wheel 514. The first gear 515 is engaged with the first rack 59. The top ends of the latches 517 are engaged with the ratchet wheel 514. After the latch 517 is inserted between the teeth of the ratchet wheel 514, it can limit the rotation of the ratchet wheel 514 to prevent the ratchet wheel 514 from rotating. The two sides of the contact piece 512 are slidably connected to the opposite sides of the two resistance seats 4, and the two resistance seats 4 are electrically connected to the contact piece 512. After the resistance seat 4 contacts the contact piece 512, the circuit is connected, and the detection probe 3 works normally.

[0036] Through the setting of the pressing - type resistance adjusting mechanism 5, each time the left - hand pressing column 54 is pressed, the contact area between the contact piece 512 and the resistance seat 4 can be increased, realizing the reduction of the resistance in the circuit where the detection probe 3 is located. Each time the right - hand pressing column 54 is pressed, the contact area between the contact piece 512 and the resistance seat 4 can be reduced, realizing the increase of the resistance in the circuit where the detection probe 3 is located. Furthermore, the purpose of flexibly adjusting the voltage in the detection circuit is achieved, thereby adjusting the detection sensitivity of the detection probe 3, enabling the detection probe 3 to accurately collect and amplify the voltage signal, and further improving the accuracy of the detection data.

[0037] Embodiment 2

[0038] On the basis of Embodiment 1, refer to Figure 3 、 Figure 4 、 Figure 8 、 Figure 9As shown in the figure, a heat dissipation slot 6 is provided on one side of the detection box 1. A baffle 8 is rotatably connected between the interiors of the heat dissipation slot 6 by a plurality of vertical rods 7. When the baffle 8 rotates to a state perpendicular to the heat dissipation slot 6, maximum heat dissipation can be achieved at this time. Fixing blocks 9 are fixed on one side of each of the plurality of baffles 8. A connecting rod 10 is arranged above the plurality of fixing blocks 9. A plurality of square blocks 11 are fixed on the connecting rod 10. The bottom of each of the plurality of square blocks 11 is rotatably connected to the top of the fixing block 9 by a pin shaft. Through the arrangement of the fixing blocks 9, the connecting rod 10, the pin shaft, and the square blocks 11, the plurality of baffles 8 can be linked, and rotating one of the baffles 8 can drive all the baffles 8 to rotate.

[0039] A heat dissipation adjustment assembly 12 for adjusting the rotation angle of the baffle 8 is arranged on the connecting column 511. The heat dissipation adjustment assembly 12 includes an L-shaped rod 121 fixed on one side of the connecting column 511. A wedge-shaped block 122 is fixed at the bottom end of the L-shaped rod 121. A vertical plate 123 is fixed on the top wall of the detection box 1. A moving rod 124 is slidably connected to the inner surface of the vertical plate 123.

[0040] A circular plate 125 is fixed at one end of the moving rod 124. Two side plates 126 are fixed on one side of the circular plate 125. A roller 127 is rotatably connected between the opposite sides of the two side plates 126. The outer surface of the roller 127 is in contact with and pressed against the inclined surface of the wedge-shaped block 122. A third spring 128 is sleeved on the outer surface of the moving rod 124. One end of the third spring 128 is fixed to one side of the circular plate 125, and the other end of the third spring 128 is fixed to one side of the vertical plate 123. The setting of the third spring 128 can drive the moving rod 124 to reset.

[0041] A folding rod 129 is fixed at the top of the moving rod 124. A second rack 1210 is fixed at one end of the folding rod 129. A second gear 1211 is fixed on one of the vertical rods 7. The second rack 1210 meshes with the second gear 1211.

[0042] Through the setting of the heat dissipation adjustment assembly 12, it is linked with the pressing type resistance adjustment mechanism 5. When the connecting column 511 moves downward, since the resistance in the circuit decreases, the generated heat reduces, and the baffle 8 rotates to change the angle and gradually closes. At this time, the rotation speed of the fan 15 is reduced, the air output can be reduced, and the noise can be reduced. When the connecting column 511 moves upward, since the resistance in the circuit increases, the generated heat becomes more. At this time, the baffle 8 rotates and gradually opens. At this time, the rotation speed of the fan 15 is increased, the air output can be increased, and the heat dissipation speed can be accelerated, achieving the purpose of rapid heat dissipation and noise reduction.

[0043] Embodiment 3

[0044] On the basis of Embodiment 2, refer to Figure 1 、 Figure 2 、 Figure 4 、 Figure 8As shown in the figure, a dust removal unit 13 for wiping and removing dust from the opposite sides of the two blocking seats 4 is provided on the moving rod 124. The dust removal unit 13 includes a bent rod 131 fixed to one side of the moving rod 124. A sponge plate 132 is fixed to one end of the bent rod 131. The two sides of the sponge plate 132 are slidably connected to the opposite sides of the two blocking seats 4.

[0045] Through the setting of the dust removal unit 13, during the movement of the heat dissipation adjustment assembly 12, the opposite sides of the blocking seats 4 are wiped and dusted by the sponge plate 132. When the contact piece 512 moves upward and resets, the sponge plate 132 slides into the space between the two blocking seats 4 to also prevent dust. This effectively avoids the phenomenon that the resistance increases due to external dust adhering to the blocking seats 4 during ventilation.

[0046] A ventilation opening 14 is provided on one side of the detection box 1. A fan 15 is installed in the ventilation opening 14. A voltage sensor 16, a current sensor 17, and an analysis and comparison module 18 are installed on one side of the inner wall of the detection box 1. An alarm lamp 19, a display screen 20, and a PLC controller 21 are installed on the outside of the detection box 1. A handheld handle 22 is fixed to the bottom of the detection box 1. The fan 15, the voltage sensor 16, the current sensor 17, the analysis and comparison module 18, the alarm lamp 19, the display screen 20, and the PLC controller 21 are all prior arts, controlled by an external switch, and electrically connected to the built-in power supply of the detection box 1.

[0047] Meanwhile, the content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0048] During operation, connect the detection probe 3 to the weak current circuit to be detected. The voltage sensor 16 and current sensor 17 can quickly and accurately detect the voltage and current data in the circuit. After the data analysis and integration by the analysis and comparison module 18, the data is presented to the PLC controller 21 for adjustment. The data is displayed on the display screen 20, and the data abnormality alarm light 19 flashes to give a warning. When it is necessary to adjust the detection sensitivity of the detection probe 3, press the left pressing column 54. The pressing column 54 drives the pawl 57 to move downward and compresses the first compression spring 55. The pawl 57 drives the ratchet wheel 514 to rotate a certain angle and uses the clamping block 517 for clamping. Then, the ratchet wheel 514 drives the first gear 515 to rotate. The first gear 515 drives the first rack 59 and the connecting column 511 to move downward a certain distance. Then, the connecting column 511 drives the contact piece 512 to move downward a certain distance. Each time the left pressing column 54 is pressed, the contact piece 512 can be made to move downward a certain distance. When the contact piece 512 is connected to the two resistance seats 4, the power supply can be turned on, and the detection probe 3 is used for detection. When the contact piece 512 moves downward, the contact area between the contact piece 512 and the two resistance seats 4 becomes larger and larger. At this time, the resistance in the circuit decreases, and thus the voltage signal obtained at both ends of the detection probe 3 is changed. The detection probe 3 converts the obtained voltage signal into an electrical signal for processing and analysis. Therefore, reducing the resistance indirectly increases the signal strength obtained by the detection probe 3, realizing the adjustment of the detection sensitivity. By pressing the right pressing column 54, the contact piece 512 can be driven to reset upward, increasing the resistance and reducing the signal strength. When the connecting column 511 moves downward, since the resistance in the circuit decreases, the generated heat is reduced. At this time, the wedge block 122 moves downward and presses the roller 127, thereby driving the moving rod 124 and the second rack 1210 to move leftward. Then, the second rack 1210 drives the second gear 1211 to rotate. Then, the second gear 1211 drives the baffle 8 to rotate and change the angle and gradually close. At this time, the speed of the fan 15 is reduced, the air volume can be reduced, and the noise can be reduced. When the connecting column 511 moves upward, since the resistance in the circuit increases, more heat is generated. At this time, the baffle 8 rotates and gradually opens. At this time, the speed of the fan 15 is increased, the air volume can be increased, and the heat dissipation speed can be accelerated. During the leftward movement of the moving rod 124, the sponge plate 132 can be driven to move leftward, thereby driving the sponge plate 132 to wipe and remove dust on one side of the two resistance seats 4.

[0049] The embodiments of the invention have been described in detail above, but the above content is only the preferred embodiment of the invention and cannot be considered as limiting the scope of implementation of the invention. All equivalent changes and improvements made according to the scope of the invention application should still fall within the scope covered by the patent of the invention.

Claims

1. A safety detection device for weak current engineering, comprising a detection box (1), characterized in that: A circuit board (2) is mounted on the bottom wall of the detection box (1), the circuit board (2) being electrically connected to two detection probes (3) via a wire, two resistance seats (4) being mounted on the circuit board (2), a push-type resistance adjustment mechanism (5) being arranged on the detection box (1), a heat dissipation slot (6) being provided on one side of the detection box (1), a baffle (8) being rotatably connected between the inside of the heat dissipation slot (6) via a plurality of vertical rods (7), a fixing block (9) being fixed on one side of the plurality of baffles (8), a connecting rod (10) being arranged above the plurality of fixing blocks (9), a plurality of blocks (11) being fixed on the connecting rod (10), the bottoms of the plurality of blocks (11) being rotatably connected to the tops of the fixing blocks (9) via pins, and the push-type resistance adjustment mechanism (5) being used to adjust the detection sensitivity of the detection probe (3); The push-type resistance adjustment mechanism (5) comprises two shells (51) fixed in the detection box (1), the tops of the two shells (51) are fixed with top plates (52), the bottoms of the two shells (51) are fixed with bottom plates (53), the tops of the top plates (52) are slidably connected to two push columns (54), the bottom ends of the two push columns (54) extend into the interior of the shells (51), a spring (55) is fixed between the bottom ends of the two push columns (54) and the top of the bottom plates (53), one side of the two push columns (54) is provided with a groove (56), the inner walls of the grooves (56) are rotatably connected with a pawl (57) via a rotating shaft, one side of the inner wall of the grooves (56) is fixed with a spring sheet (58), one side of the spring sheet (58) is in contact with the pawl (57), One side of the pressing column (54) is contacted and squeezed, one side of one of the pressing columns (54) is slidably connected to a rack 1 (59), and one side of the other pressing column (54) is slidably connected to a slide bar (510), the bottom ends of the rack 1 (59) and the slide bar (510) both penetrate the bottom plate (53) and extend to the bottom of the bottom plate (53), a connecting column (511) is fixed between the bottom ends of the rack 1 (59) and the slide bar (510), a contact piece (512) is fixed to the bottom end of the connecting column (511), the inside of the two shells (51) is rotatably connected to a ratchet (514) through a rotating rod (513), a gear 1 (515) is fixed on the rotating rod (513), a spring 2 (516) is fixed on the top of the bottom plate (53), and a clamping block (517) is fixed on the top of the spring 2 (516); The connecting column (511) is provided with a heat dissipation adjustment component (12) for adjusting the rotation angle of the baffle (8), the heat dissipation adjustment component (12) comprising an L-shaped rod (121) fixed to one side of the connecting column (511), a wedge-shaped block (122) being fixed to the bottom end of the L-shaped rod (121), a vertical plate (123) being fixed to the top wall of the detection box (1), and a moving rod (124) being slidably connected to the inner surface of the vertical plate (123).

2. A safety detection device for weak current engineering according to claim 1, characterized in that: The two pawls (57) are both engaged with the ratchet (514), the gear one (515) is meshed with the rack one (59), the top of the block (517) is both engaged with the ratchet (514), the two sides of the contact piece (512) are slidably connected to the opposite sides of the two blocking seats (4), and the two blocking seats (4) are electrically connected to the contact piece (512).

3. A safety detection device for weak current engineering according to claim 1, characterized in that: A circular plate (125) is fixed to one end of the moving rod (124), two side plates (126) are fixed to one side of the circular plate (125), a roller (127) is rotatably connected between opposite sides of the two side plates (126), the outer surface of the roller (127) is in contact and extrusion with the inclined surface of the wedge block (122), and a spring three (128) is sleeved on the outer surface of the moving rod (124), one end of the spring three (128) is fixed to one side of the circular plate (125), and the other end of the spring three (128) is fixed to one side of the vertical plate (123).

4. A safety detection device for weak current engineering according to claim 1, characterized in that: A folding rod (129) is fixed on the top of the moving rod (124), a rack 2 (1210) is fixed on one end of the folding rod (129), a gear 2 (1211) is fixed on one of the vertical rods (7), and the rack 2 (1210) is meshed with the gear 2 (1211).

5. The safety detection equipment for weak current engineering according to claim 1 is characterized by: The movable rod (124) is provided with a dust removal unit (13) for wiping and removing dust from opposite sides of the two blocking seats (4); the dust removal unit (13) comprises a bent rod (131) fixed to one side of the movable rod (124); a sponge plate (132) is fixed to one end of the bent rod (131); and two sides of the sponge plate (132) are slidably connected to opposite sides of the two blocking seats (4).

6. The safety detection equipment for weak current engineering according to claim 1, characterized in that: A vent (14) is provided on one side of the detection box (1), a fan (15) is installed in the vent (14), a voltage sensor (16), a current sensor (17), and an analysis and comparison module (18) are installed on one side of the inner wall of the detection box (1), an alarm light (19), a display screen (20), and a PLC controller (21) are installed on the outside of the detection box (1), and a hand-held handle (22) is fixed to the bottom of the detection box (1).

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