A safety socket for electric power construction

Abstract

The present invention discloses a safety socket for electric power construction, which comprises a housing. On the front and rear sides of the upper surface of the housing, first side plates are symmetrically and fixedly installed. On both sides of the inner surfaces of the two first side plates, second side plates are symmetrically and fixedly installed. On the upper surfaces of the first side plates and the second side plates, a top plate is fixedly installed. Inside the two first side plates, multiple groups of safety mechanisms are fixedly installed. One side of the safety mechanism includes two guide rails, which are symmetrically and fixedly installed on the inner surfaces of the two first side plates. The upper surfaces of the guide rails are in sliding contact with the lower surface of the top plate. A sealing block is slidably sleeved on the inner surfaces of the two guide rails. Thus, the problems in the prior art are solved, that is, when the elastic valve is subjected to a vertical force, it is easily opened, resulting in accidental touch. At the same time, the problems that the elastic valve is easily damaged, the plug is easily detached from the socket and there is no waterproof function are solved. In addition, the use of disposable fuses and the problem that the socket catches fire and all plugs are damaged are also avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of electrical appliances, and specifically relates to a safety socket for electric power construction. Background Art

[0002] A socket is a transfer device widely used for electrical connection. In terms of materials, it is roughly divided into: bakelite, ceramic, plastic, etc. In addition, a socket mainly consists of three major parts: a power cord, a socket body, and a fuse. And the most important thing on the socket body is the shape and layout of the plug jacks.

[0003] Traditional sockets are provided with a simple elastic valve in the middle of the socket and the contact to avoid accidental mis-touch. When in use, only a little force needs to be applied in the vertical direction to simply open the elastic valve and insert the plug into the inside of the socket. Although the elastic valve plays a certain protective role, as long as a child exerts force, there is still a chance to open the elastic valve and cause mis-touch. Especially in places such as construction sites and electric power construction where there are many metal materials, the risk of mis-touch will be greatly increased. Since the elastic valve is composed of a thin plastic valve and a small-sized spring, in actual use, problems such as damage to the elastic valve and easy detachment of the plug from the socket often occur. The traditional elastic valve has no waterproof measures, so when used outdoors, sudden rainfall or splashing of industrial water will directly cause a short circuit, burn out equipment or cause a fire. In addition, since the overload protection device of the traditional socket only consists of a disposable fuse, when the socket is overloaded, the fuse breaks. During the construction of a construction site and the process of electric power construction, socket overload is a very common situation. Frequent replacement of the disposable fuse will not only affect the production progress but also increase the production cost. Therefore, during the construction of a construction site and the process of electric power construction, when the fuse of the socket breaks, workers will directly bypass the fuse and connect the wires, resulting in serious safety hazards. In addition, when the socket catches fire due to instant high-amplitude overload, other plugs inserted into the socket will also catch fire, causing all plugs to be damaged. Summary of the Invention

[0004] The purpose of the present invention is to provide a safety socket for electric power construction to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A safety socket for electric power construction, comprising a housing. On the front and rear sides of the upper surface of the housing, first side plates are symmetrically and fixedly installed. On both sides of the inner surfaces of the two first side plates, second side plates are symmetrically and fixedly installed. On the upper surfaces of the first side plates and the second side plates, a top plate is fixedly installed. Inside the two first side plates, multiple safety mechanisms are fixedly installed. One side of the safety mechanism includes two guide rails, which are symmetrically and fixedly installed on the inner surfaces of the two first side plates. The upper surface of the top plate is in sliding contact with the upper surface of the guide rails. A sealing block is slidably sleeved on the inner surfaces of the two guide rails. In the middle of the front side of the sealing block, a wire sleeve is fixedly installed. In the middle of the wire sleeve, a lead screw that is movably sleeved with the front first side plate is installed. A first elastic member with its front and rear ends respectively fixedly installed on the rear side surface of the first side plate and the front side surface of the sealing block is wound around the sides of the wire sleeve and the lead screw. At the front end of the lead screw, a gear is fixedly installed. A driving mechanism is provided between the front side surface of the housing and the gear. On the front and rear sides of the lower surface of the top plate, multiple clamping plates that are slidably sleeved with the inner surfaces of the adjacent guide rails are fixedly installed. In the cavities of the multiple clamping plates, third elastic members with their upper and lower ends respectively contacting the lower surface of the top plate and the bottom surface of the inner cavity of the housing are provided. At the bottoms of the inner side surfaces of the multiple clamping plates, grooves are opened. At the bottoms of the cavities of the multiple clamping plates, support plates with the top edges coinciding with the bottom edges of the grooves are fixedly installed. On the rear sides of the upper surfaces of the multiple support plates, expansion blocks are fixedly installed. In the middle of one side of the multiple expansion blocks, resistors are fixedly installed. Multiple extrusion mechanisms are provided between the opposite grooves and the bottom surface of the inner cavity of the housing.

[0007] The driving mechanism includes a side shell, which is fixedly installed on the front side surface of the housing. A sliding plate is movably sleeved on the bottom of the inner side surfaces of the housing and the side shell. On both sides of the upper surface of the sliding plate, mounting shafts are slidably sleeved. At the bottoms of the two mounting shafts, limit blocks are fixedly installed. At the tops of the two mounting shafts, a rack is fixedly installed. On the sides of the two mounting shafts, second elastic members with their upper and lower ends respectively fixedly installed on the upper surface of the sliding plate and the lower surface of the limit block are wound. At the front end of the rack, a handle block with its rear side surface slidingly contacting the front side surface of the side shell is fixedly installed.

[0008] The extrusion mechanism includes a sliding sleeve, which is fixedly installed on the bottom of the inner cavity of the housing. In the front and rear parts of the inner cavity of the sliding sleeve, sliding rods are symmetrically and slidably sleeved. In the middle of the inner sides of the two sliding rods, a fourth elastic member located in the middle of the inner cavity of the sliding sleeve is fixedly installed. The sliding rods are in sliding and clamping connection with the grooves, and the sliding rods are in sliding contact with the upper surfaces of the support plates. On the inner side surfaces of the adjacent sliding rods on the same side, a curved rod is fixedly installed.

[0009] The upper surface of the top plate is provided with multiple groups of first jack groups, and the upper surfaces of the multiple sealing blocks are each provided with a second jack group that cooperates with the first jack groups. A plurality of contact pieces located directly below the first jack groups are fixedly installed at the bottom of the inner cavity of the housing. The multiple resistors on the front side are connected in series with the right contact piece through a first wire, the multiple resistors on the rear side are connected in series with the right contact piece through a second wire, and the multiple intermediate contact pieces are connected in series through a third wire.

[0010] A smooth wear-resistant metal coating is provided on both the upper surface of the sealing block and the lower surface of the top plate, and a rubber coating is provided on the upper surface of the top plate.

[0011] A threaded hole is provided in the middle of the wire sleeve, and a thread is provided at the rear of the screw rod.

[0012] The resistor is made of a material with high heat resistance and high resistance value, and the expansion block is made of a material with a high coefficient of thermal expansion.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] 1. In the present invention, the driving mechanism drives the gear to rotate, the rack drives the gear to rotate, the gear drives the screw rod to rotate, the screw rod drives the wire sleeve to move forward, the wire sleeve drives the sealing block to move forward, and the wire sleeve compresses the spring to contract. When the second jack group coincides with the first jack group, the plug is inserted into the inside of the first jack group, and the plug is in contact with the contact through the first jack group and the second jack group to be energized. After the plug makes contact, the pressing block is pressed downward, the pressing block drives the rack to move downward, the rack compresses the second elastic member to contract downward, and the rack disengages from the gear. At this time, the first elastic member resets, the first elastic member presses the sealing block to move backward, the sealing block drives the wire sleeve to move backward, the wire sleeve drives the screw rod to rotate, and the screw rod drives the gear to rotate. Thus, when any force of any magnitude in the vertical direction acts on the sealing block, the sealing block will not move horizontally, avoiding the problem that the elastic valve of the traditional socket is easily opened and damaged. In addition, the first elastic member pushes the sealing block to give the plug a horizontal force to prevent the plug from detaching.

[0015] 2. When the present invention is energized through the first wire, heat is generated due to the resistance, the expansion block expands when heated, the expansion block pushes the sliding rod to move inwards, the sliding rod drives the curved rod 114 to move inwards, the sliding rod compresses the fourth elastic member to contract inwards. When the sliding rod disengages from the support plate, the third elastic member quickly pushes the top plate upwards, the top plate drives the plug and the clamping plate upwards, the clamping plate drives the expansion block and the resistance upwards. Similarly, during use, the top plate drives the clamping plate to insert into the inner side surface of the guide rail, the top plate compresses the third elastic member to contract, the clamping plate pushes the sliding rod to move inwards along the sliding sleeve, the sliding rod drives the curved rod to move inwards, the sliding rod compresses the fourth elastic member to contract until the sliding rod is clamped with the groove. Thus, the overload protection device of the device can be reused, avoiding the use of disposable fuses, reducing the production cost and overload risk. At the same time, when the socket is overloaded, the plug can be quickly separated from the socket, preventing all plugs from being damaged after a fire.

[0016] 3. By means of the smooth coating on the upper surface of the sealing block and the lower surface of the top plate and the rubber coating on the upper surface of the top plate, the present invention prevents water, dust, etc. from entering the interior of the device through the socket, thus avoiding the problem of short circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the present invention.

[0018] Figure 2 is a schematic diagram of the extrusion mechanism of the present invention.

[0019] Figure 3 is a schematic diagram of the overall appearance of the present invention.

[0020] Figure 4 is a schematic diagram of the clamping plate structure of the present invention.

[0021] Figure 5 is a schematic diagram of the resistance structure of the present invention.

[0022] In the figure: 1, housing; 2, first side plate; 3, second side plate; 4, top plate; 401, first jack group; 5, safety mechanism; 501, guide rail; 502, sealing block; 503, wire sleeve; 504, lead screw; 505, first elastic member; 506, gear; 5021, second jack group; 6, drive mechanism; 601, side housing; 602, sliding plate; 603, mounting shaft; 604, limiting block; 605, rack; 606, second elastic member; 607, handle block; 7, clamping plate; 8, third elastic member; 9, support plate; 10, expansion block; 11, extrusion mechanism; 101, resistance; 111, sliding sleeve; 112, sliding rod; 113, fourth elastic member; 114, curved rod. DETAILED DESCRIPTION OF THE INVENTION

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0024] As Figures 1 to 5 shown, an embodiment of the present invention provides a safety socket for power construction, including a housing 1. On the front and rear sides of the upper surface of the housing 1, first side plates 2 are symmetrically and fixedly installed. On both sides of the inner surfaces of the two first side plates 2, second side plates 3 are symmetrically and fixedly installed. On the upper surfaces of the first side plates 2 and the second side plates 3, a top plate 4 is fixedly installed. Inside the two first side plates 2, multiple safety mechanisms 5 are fixedly installed. One side of the safety mechanism 5 includes two guide rails 501, which are symmetrically and fixedly installed on the inner surfaces of the two first side plates 2. The upper surface of the guide rail 501 is in sliding contact with the lower surface of the top plate 4. A sealing block 502 is slidably sleeved on the inner sides of the two guide rails 501. In the middle of the front side of the sealing block 502, a wire sleeve 503 is fixedly installed. In the middle of the wire sleeve 503, a lead screw 504 that is movably sleeved with the front first side plate 2 is movably sleeved. On the outer sides of the wire sleeve 503 and the lead screw 504, a first elastic member 505 with its front and rear ends fixedly installed on the rear side surface of the first side plate 2 and the front side surface of the sealing block 502 respectively is wound. At the front end of the lead screw 504, a gear 506 is fixedly installed. Between the front side surface of the housing 1 and the gear 506, a driving mechanism 6 is provided.

[0025] On the front and rear sides of the lower surface of the top plate 4, a plurality of clamping plates 7 that are slidably sleeved on the inner sides of the adjacent guide rails 501 are fixedly installed. In the cavities of the plurality of clamping plates 7, third elastic members 8 with their upper and lower ends respectively contacting the lower surface of the top plate 4 and the bottom surface of the inner cavity of the housing 1 are provided. At the bottom of the inner sides of the plurality of clamping plates 7, grooves are formed. At the bottom of the cavities of the plurality of clamping plates 7, support plates 9 with the top edges coinciding with the bottom edges of the grooves are fixedly installed. On the rear sides of the upper surfaces of the plurality of support plates 9, expansion blocks 10 are fixedly installed. In the middle of one side of the plurality of expansion blocks 10, resistors 101 are fixedly installed. Between the plurality of opposite grooves and the bottom surface of the inner cavity of the housing 1, extrusion mechanisms 11 are provided. Among them, at the bottom of the front side surface of the housing 1, a slot is formed, so that the sliding plate 602 can slide along the slot. On the upper surface of the first side plate 2 and the lower surface of the top plate 4, a layer of rubber coating is provided to prevent water and dust from entering the inside of the device through the gap between the first side plate 2 and the top plate 4 and causing a short circuit.

[0026] As Figure 1 and Figure 3As shown in the figure, the driving mechanism 6 includes a side shell 601. The side shell 601 is fixedly installed on the front side of the outer shell 1. A sliding plate 602 is movably sleeved at the bottom of the inner side surface of the outer shell 1 and the side shell 601. Installation shafts 603 are slidably sleeved on both sides of the upper surface of the sliding plate 602. Limit blocks 604 are fixedly installed at the bottoms of the two installation shafts 603. A rack 605 is fixedly installed at the tops of the two installation shafts 603. Second elastic members 606 are wound around the sides of the two installation shafts 603, and the upper and lower ends of the second elastic members 606 are fixedly installed on the upper surface of the sliding plate 602 and the lower surface of the limit block 604 respectively. A handle block 607, whose rear side is in sliding contact with the front side of the side shell 601, is fixedly installed at the front end of the rack 605. Among them, a chute is provided in the middle of the outer side surface of the side shell 601, and a bayonet is provided in the middle of the top of the chute. In the non-working state, the rack 605 is clamped in the bayonet to prevent the rack 605 from sliding due to external factors. A wear-resistant metal coating is provided on the contact surface between the rack 605 and the chute and the inner side surface of the chute to reduce the wear when the side shell 601 and the rack 605 slide relative to each other and improve the service life of the device.

[0027] As Figure 2 shown, the extrusion mechanism 11 includes a sliding sleeve 111. The sliding sleeve 111 is fixedly installed at the bottom of the inner cavity of the outer shell 1. Slide bars 112 are symmetrically and slidably sleeved in the front and rear parts of the inner cavity of the sliding sleeve 111. A fourth elastic member 113 located in the middle of the inner cavity of the sliding sleeve 111 is fixedly installed in the middle of the inner sides of the two slide bars 112. The slide bars 112 are in sliding engagement with the grooves, and the slide bars 112 are in sliding contact with the upper surface of the support plate 9. Curved bars 114 are fixedly installed on the inner sides of the adjacent slide bars 112 on the same side. Among them, the outer side surfaces of the slide bars 112 and the inner side surfaces of the sliding sleeve 111 are both smooth surfaces, and the side surfaces of the grooves are all smooth surfaces to prevent the slide bars 112 from being hindered when contracting inward.

[0028] As Figures 1 to 5 shown, a plurality of groups of first jack groups 401 are provided on the upper surface of the top plate 4. Second jack groups 5021 that cooperate with the first jack groups 401 are provided on the upper surfaces of the plurality of sealing blocks 502. A plurality of groups of contact pieces located directly below the first jack groups 401 are fixedly installed at the bottom of the inner cavity of the outer shell 1. The plurality of front-side resistors 101 and the right-side contact piece are connected in series through a first wire, and the plurality of rear-side resistors 101 and the right-side contact piece are connected in series through a second wire. The plurality of intermediate contact pieces are connected in series through a third wire. Among them, the first wire is connected to the live wire on the outside, the second wire is connected to the neutral wire on the outside, and the third wire is connected to the ground wire on the outside. When in use, the current first passes through the resistor 101 and then through the contact piece.

[0029] As Figure 1 、 Figure 3 and Figure 4As shown, a smooth wear-resistant metal coating is provided on both the upper surface of the sealing block 502 and the lower surface of the top plate 4 to improve the sealing between the top plate 4 and the sealing block 502, preventing surface dust, water, etc. from entering the interior of the device and causing a short circuit. A rubber coating is provided on the upper surface of the top plate 4 to improve the sealing of the contact between the top plate 4 and the external plug, preventing water or dust from entering the interior of the device through the socket and causing a short circuit.

[0030] As Figure 1 shown, a threaded hole is provided in the middle of the threaded sleeve 503, and a thread is provided at the rear of the threaded rod 504. The threaded hole and the thread are connected in cooperation. During use, the threaded sleeve 503 can drive the threaded rod 504 to rotate through the threaded hole.

[0031] As Figure 2 and Figure 5 shown, the resistor 101 is made of a heat-resistant material with a high resistance value, and the expansion block 10 is made of a material with a high coefficient of thermal expansion. Thus, the resistor 101 can generate a higher temperature to heat the expansion block 10, increasing the expansion amount of the expansion block 10, and then pushing the sliding rod 112 to move inward.

[0032] During use, drag the handle block 607. The handle block 607 moves along the chute to one side, driving the rack 605 to move to one side. The rack 605 drives one side of the mounting shaft 603 to move. The mounting shaft 603 drives the slide plate 602, the rack 605, and the second elastic member 606 to move to one side. When the rack 605 contacts the gear 506, the rack 605 drives the gear 506 to rotate. The gear 506 drives the threaded rod 504 to rotate. The threaded rod 504 drives the threaded sleeve 503 to move forward. The threaded sleeve 503 drives the sealing block 502 to move forward, compressing the first elastic member 505 to contract. When the second jack group 5021 coincides with the first jack group 401, insert the plug into the interior of the first jack group 401. The plug is in contact with the contact through the first jack group 401 and the second jack group 5021 to conduct electricity. After the plug makes contact, press down on the handle block 607. The handle block 607 drives the rack 605 to move downward. The rack 605 compresses the second elastic member 606 to contract downward, and the rack 605 disengages from the gear 506. At this time, the first elastic member 505 resets, and the first elastic member 505 presses the sealing block 502 to move backward. The sealing block 502 drives the threaded sleeve 503 to move backward. The threaded sleeve 503 drives the threaded rod 504 to rotate. The threaded rod 504 drives the gear 506 to rotate. Thus, when the sealing block 502 is subjected to any vertical force, the sealing block 502 will not move horizontally, avoiding the problem that the elastic valve of the traditional socket is easily opened and damaged. In addition, the first elastic member 505 pushes the sealing block 502 to give the plug a horizontal force to prevent the plug from disengaging. At the same time, the smooth coatings on the upper surface of the sealing block 502 and the lower surface of the top plate 4 and the rubber coating on the upper surface of the top plate 4 prevent water or dust from entering the interior of the device through the socket and causing a short circuit problem.

[0033] During use, the first wire is energized, the resistor 101 generates heat, the expansion block 10 expands due to heat, the expansion block 10 pushes the sliding rod 112 to move inwards, the sliding rod 112 drives the curved rod 114 to move inwards, the sliding rod 112 compresses the fourth elastic member 113 to contract inwards. When the sliding rod 112 disengages from the support plate 9, the third elastic member 8 quickly pushes the top plate 4 to move upwards, the top plate 4 drives the plug and the clamping plate 7 to move upwards, the clamping plate 7 drives the expansion block 10 and the resistor 101 to move upwards. Similarly, during use, the top plate 4 drives the clamping plate 7 to insert into the inner side surface of the guide rail 501, the top plate 4 compresses the third elastic member 8 to contract, the clamping plate 7 pushes the sliding rod 112 to move inwards along the sliding sleeve 111, the sliding rod 112 drives the curved rod 114 to move inwards, the sliding rod 112 compresses the fourth elastic member 113 to contract until the sliding rod 112 is clamped with the groove. Thus, the overload protection of the device can be reused, avoiding the use of disposable fuses, accelerating the production speed, reducing the production cost and the overload risk. At the same time, when the socket is overloaded, the plug can be quickly detached from the socket, preventing all plugs from being damaged after a fire occurs.

Claims

1. A safety socket for electric power construction, comprising a housing (1), and first side plates (2) are symmetrically and fixedly installed on the front and rear sides of the upper surface of the housing (1), characterized in that: On both sides of the inner sides of the two first side plates (2), second side plates (3) are symmetrically and fixedly installed. On the upper surfaces of the first side plates (2) and the second side plates (3), a top plate (4) is fixedly installed. Inside the two first side plates (2), multiple safety mechanisms (5) are fixedly installed. One side of the safety mechanism (5) includes two guide rails (501). The two guide rails (501) are symmetrically and fixedly installed on the inner sides of the two first side plates (2). The lower surface of the top plate (4) is in sliding contact with the upper surface of the guide rails (501). A sealing block (502) is slidably sleeved on the inner sides of the two guide rails (501). In the middle of the front side of the sealing block (502), a wire sleeve (503) is fixedly installed. In the middle of the wire sleeve (503), a lead screw (504) that is movably sleeved with the front first side plate (2) is movably sleeved. A first elastic member (505) whose front and rear ends are respectively fixedly installed on the rear side surface of the first side plate (2) and the front side surface of the sealing block (502) is wound around the sides of the wire sleeve (503) and the lead screw (504). At the front end of the lead screw (504), a gear (506) is fixedly installed. A driving mechanism (6) is provided between the front side surface of the housing (1) and the gear (506). On the front and rear sides of the lower surface of the top plate (4), multiple clamping plates (7) that are slidably sleeved on the inner sides of the adjacent guide rails (501) are fixedly installed. In the cavities of the multiple clamping plates (7), third elastic members (8) whose upper and lower ends are respectively in contact with the lower surface of the top plate (4) and the bottom surface of the inner cavity of the housing (1) are provided. At the bottom of the inner sides of the multiple clamping plates (7), grooves are formed. At the bottom of the cavities of the multiple clamping plates (7), support plates (9) whose top edges coincide with the bottom edges of the grooves are fixedly installed. On the rear sides of the upper surfaces of the multiple support plates (9), expansion blocks (10) are fixedly installed. In the middle of one side of the multiple expansion blocks (10), resistors (101) are fixedly installed. Multiple sets of extrusion mechanisms (11) are provided between the opposite grooves and the bottom surface of the inner cavity of the housing (1).

2. The safety socket for electric power construction according to claim 1, characterized in that: The driving mechanism (6) includes a side shell (601). The side shell (601) is fixedly installed on the front side surface of the housing (1). A sliding plate (602) is movably sleeved on the bottom of the inner side surfaces of the housing (1) and the side shell (601). On both sides of the upper surface of the sliding plate (602), mounting shafts (603) are slidably sleeved. At the bottoms of the two mounting shafts (603), limit blocks (604) are fixedly installed. At the tops of the two mounting shafts (603), a rack (605) is fixedly installed. Second elastic members (606) whose upper and lower ends are respectively fixedly installed on the upper surface of the sliding plate (602) and the lower surface of the limit blocks (604) are wound around the sides of the two mounting shafts (603). At the front end of the rack (605), a handle block (607) whose rear side is in sliding contact with the front side surface of the side shell (601) is fixedly installed.

3. The safety socket for electric power construction according to claim 2, characterized in that: The extrusion mechanism (11) includes a sliding sleeve (111), the sliding sleeve (111) is fixedly installed at the bottom of the inner cavity of the housing (1), the front and rear parts of the inner cavity of the sliding sleeve (111) are symmetrically and slidably sleeved with sliding rods (112), a fourth elastic member (113) located in the middle of the inner cavity of the sliding sleeve (111) is fixedly installed in the middle of the inner sides of the two sliding rods (112), the sliding rods (112) are slidably clamped with the grooves, the sliding rods (112) are in sliding contact with the upper surface of the support plate (9), and a curved rod (114) is fixedly installed on the inner side surface of the adjacent sliding rods (112) on the same side.

4. A safety socket for electric power construction according to any one of claims 1-3, characterized in that: A plurality of groups of first jack groups (401) are formed on the upper surface of the top plate (4), a second jack group (5021) matching with the first jack group (401) is arranged on the upper surface of each of the plurality of sealing blocks (502), a plurality of groups of contact pieces located directly below the first jack group (401) are fixedly installed at the bottom of the inner cavity of the housing (1), the plurality of front-side resistors (101) and the right contact piece are connected in series through a first wire, the plurality of rear-side resistors (101) and the right contact piece are connected in series through a second wire, and the plurality of middle contact pieces are connected in series through a third wire.

5. The safety socket for electric power construction according to claim 1, characterized in that: A smooth wear-resistant metal coating is provided on both the upper surface of the sealing block (502) and the lower surface of the top plate (4), and a rubber coating is provided on the upper surface of the top plate (4).

6. The safety socket for electric power construction according to claim 1, characterized in that: A wire hole is formed in the middle of the wire sleeve (503), and a thread is provided at the rear part of the lead screw (504).

7. The safety socket for electric power construction according to claim 1, characterized in that: The resistor (101) is made of a material with high heat resistance and high resistance value, and the expansion block (10) is made of a material with a high coefficient of thermal expansion.

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