CN213087497U

CN213087497U - Building engineering is protection guardrail for foundation ditch convenient to dismantle

Info

Publication number: CN213087497U
Application number: CN202021815041.3U
Authority: CN
Inventors: 杨景红
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-08-27
Filing date: 2020-08-27
Publication date: 2021-04-30
Anticipated expiration: 2030-08-27

Abstract

The utility model discloses a building engineering is protection guardrail for foundation ditch convenient to dismantle belongs to building technical field, include: the left end and the right end of the left protective guard are both provided with a group of connecting screw holes, and each group of connecting screw holes is provided with two connecting screw holes; the left end and the right end of the right guard rail are provided with a group of notches, two notches are arranged in each group, and the inner wall of each group of notches is provided with a circular socket; and coupling mechanism, coupling mechanism can dismantle the setting between left rail guard and right rail guard, and coupling mechanism is provided with four groups, the utility model discloses be convenient for install and dismantle, the simple operation conceives ingeniously, and the practicality is strong.

Description

Building engineering is protection guardrail for foundation ditch convenient to dismantle

Technical Field

The utility model relates to a building technical field, more specifically say, relate to a building engineering is protection guardrail for foundation ditch convenient to dismantle.

Background

At present, with the rapid development of modern building industry, the construction method is continuously updated, the construction sites of deep foundation pits are more and more, and in the construction, in order to ensure the safety of workers in the construction and prevent people or materials from falling into the deep foundation pits, a protective railing needs to be arranged at the side of the foundation pit for protection in the excavation stage.

Authorizing publication number "CN 205857920U" and having recorded "a construction foundation ditch guardrail, including warning light, stand, guardrail frame, warning sign and stabilizer blade, the switch is installed to the top of warning light, the below of warning light is fixed with the battery, the stand is connected with the battery through the binding, be provided with the connecting block on the stand, the stand is all installed to the left and right sides of guardrail frame, it has the location cover shell to inlay on the guardrail frame, and the guardrail frame is connected with the connecting block through the location cover shell, the below of guardrail frame is fixed with the reflector panel, the reflector panel is installed to the below of warning sign, the stabilizer blade is connected with the stand through the circulator. This construction foundation ditch guardrail is provided with the warning light and warns through light cooperation reflector panel jointly, and the security is high, is equipped with stabilizer blade support guardrail stand, can not fall down to break under the condition of scraping strong wind, and the fastness is high, can be better serve the construction trade, furthest's guarantee constructor's safety and protection to construction equipment ".

Above-mentioned guard rail adopts fixed guard rail more, owing to in the process of digging soil at the job site, often need carry out the dismouting to fixed guard rail, needs a large amount of human input, along with the continuous improvement of human cost, is fairly unfavorable to the control of job site cost, if fail in time to install fixed guard rail in addition, will cause job site's major potential safety hazard.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved

To the problem that exists among the prior art, the utility model aims to provide a building engineering is protection guardrail for foundation ditch convenient to dismantle, its installation and dismantlement of being convenient for, the simple operation conceives ingeniously, and the practicality is strong.

2. Technical scheme

In order to solve the above problem, the utility model adopts the following technical scheme:

the utility model provides a building engineering is protection guardrail for foundation ditch convenient to dismantle, includes:

the left end and the right end of the left protective guard are both provided with a group of connecting screw holes, and each group of connecting screw holes is provided with two connecting screw holes;

the left end and the right end of the right guard rail are both provided with a group of notches, two notches are arranged in each group, and the inner wall of each group of notches is provided with a circular socket; and

coupling mechanism, coupling mechanism can dismantle the setting between left rail guard and right rail guard, coupling mechanism is provided with four groups, wherein:

every group coupling mechanism all includes screw rod, spacing slide bar, sliding sleeve, stopper, L type inserted bar and spring, threaded connection between screw rod and the connection screw, the fixed circumference surface of keeping away from the connection screw at the screw rod that sets up of spacing slide bar, sliding sleeve, stopper and L type inserted bar all are provided with two, two the stopper is fixed respectively and is set up the upper and lower both ends at spacing slide bar, two the equal movable sleeve of sliding sleeve is established at the circumference surface of spacing slide bar and can freely slide, the spring is fixed to be set up between two sliding sleeves, two L type inserted bar is fixed respectively and is set up the tip of keeping away from the connection screw at two sliding sleeves, two L type inserted bar activity grafting respectively is in two, the utility model discloses be convenient for install and dismantle, the simple operation, ingenious design, the practicality is strong.

As a preferred scheme of the utility model, the left protective guard comprises a left vertical beam, a left cross beam, a left triangular slot, a left threaded hole, a left screw, a left vertical plate, a left triangular insert block, a left threaded groove and a left socket, wherein the left vertical beam and the left cross beam are respectively provided with two, two are vertically arranged on the left and right sides of the left vertical beam, two are vertically and transversely detachably arranged between the two left vertical beams, four left threaded holes, four left screws, four left threaded grooves and four left sockets are respectively arranged on the left and right sides of the upper ends of the two left cross beams, four left sockets are respectively arranged on the upper and lower ends of the two left vertical beams, four left threaded grooves are respectively arranged on the bottom walls of the four left sockets, each left cross beam is respectively and movably clamped between the two left sockets, each left screw is respectively and is in threaded connection between the left threaded hole and the left threaded groove, the left side riser is provided with a plurality ofly, and the vertical equidistance setting of a plurality of left risers, the left side triangle-shaped inserted block is provided with the multiunit, every group the left side triangle-shaped inserted block all is provided with two, and two left side triangle-shaped inserted blocks are fixed the upper and lower both ends that set up at the left riser respectively, the left side triangle-shaped slot is provided with two sets ofly, and is two sets of the tip that is close to mutually at two left crossbeams is seted up respectively to the left side triangle-shaped slot, every group the left side triangle-shaped slot all is provided with a plurality ofly.

As a preferred scheme of the utility model, the right protective guard comprises a right vertical beam, a right cross beam, a right triangular slot, a right threaded hole, a right screw, a right vertical plate, a right triangular insert block, a right threaded groove and a right socket, wherein the right vertical beam and the right cross beam are respectively provided with two, two right vertical beams are vertically arranged from left to right, two right cross beams are transversely and detachably arranged between the two right vertical beams, the right threaded hole, the right screw, the right threaded groove and the right socket are respectively provided with four, four right threaded holes are respectively arranged at the left and right sides of the upper ends of the two right cross beams, four right sockets are respectively arranged at the upper and lower ends of the two right vertical beams, four right threaded grooves are respectively arranged at the bottom walls of the four right sockets, each right cross beam is movably clamped between the two right sockets, each right screw is respectively in threaded connection between the right threaded hole and the right threaded groove, the right side riser is provided with a plurality ofly, and the vertical equidistance setting of a plurality of right risers, the right side triangle-shaped inserted block is provided with the multiunit, every group the right side triangle-shaped inserted block all is provided with two, and two right side triangle-shaped inserted blocks are fixed the upper and lower both ends that set up at the right riser respectively, the right side triangle-shaped slot is provided with two sets ofly, and is two sets of the tip that is close to mutually at two right crossbeams is seted up respectively to the right side triangle-shaped slot, every group the right side triangle-shaped slot all is provided with a plurality ofly.

As a preferred scheme of the utility model, still include the fastening device who sets up on left rail guard and right rail guard.

As a preferred scheme of the utility model, fastening device is provided with four groups, every group fastening device all includes fixed block and stock, the stock is fixed to be set up in the bottom of fixed block, and wherein two fixed blocks are fixed respectively to be set up the tip downside of keeping away from mutually at two left side vertical beams, and two other fixed blocks are fixed respectively to be set up the tip downside of keeping away from mutually at two right side vertical beams.

As a preferred scheme of the utility model, two the movable hole has all been seted up at the top of sliding sleeve, the sliding sleeve passes through sliding fit between movable hole and the spacing slide bar, the diameter of stopper is greater than the aperture in movable hole.

3. Advantageous effects

Compared with the prior art, the utility model has the advantages of:

(1) the utility model discloses at first screw rod and be connected screw between screw thread fit realize dismantling, because the sliding sleeve can be in the activity of the circumference surface of spacing slide bar, cooperate the good elastic force effect of spring simultaneously, extrude two sliding sleeves, make the spring become compression state by initial condition, and make two sliding sleeves be close to, thereby insert two L type inserted bars respectively in two circular sockets, then the spring resets by compression state and accomplishes the installation, only need press two sliding sleeves when needs are dismantled, make L type inserted bar break away from with circular socket and accomplish the dismantlement can.

(2) The utility model discloses a left crossbeam is pegged graft in two left sockets, and left riser is pegged graft respectively in two left triangle-shaped slots through two left triangle-shaped inserts, then through the installation of left screw, has realized the installation between left side perpendicular roof beam, left crossbeam and the left riser, and on the same principle, can realize the right side and erect the installation between roof beam, right crossbeam and the right riser.

(3) The utility model discloses a firm connection between left rail guard, right rail guard and the ground has been realized to fastening device's setting.

Drawings

Fig. 1 is a first exploded perspective view of the protective fence for the construction engineering foundation pit, which is convenient to disassemble;

fig. 2 is an enlarged view of a part a in fig. 1 of the protective fence for the construction engineering foundation pit convenient to disassemble according to the present invention;

fig. 3 is an enlarged view of a protection guardrail for a construction pit, which is convenient to disassemble, at the position B in fig. 1;

fig. 4 is an enlarged view of the protective guard bar for the construction engineering foundation pit, which is convenient to disassemble, at the position C in fig. 1;

fig. 5 is an enlarged view of the conveniently detachable protective fence for the construction engineering foundation pit at the position D in fig. 1;

fig. 6 is a second exploded perspective view of the protective fence for the construction pit, which is convenient to disassemble and assemble;

fig. 7 is the utility model relates to a building engineering is stereograph of protection guardrail for foundation ditch convenient to dismantle.

The reference numbers in the figures illustrate:

1. a left guard rail; 101. a left vertical beam; 102. a left cross beam; 103. a left triangular slot; 104. a left threaded hole; 105. a left screw; 106. a left riser; 107. a connecting screw hole; 108. a left triangular insert; 109. a left thread groove; 110. a left jack; 2. a right guard rail; 201. a right vertical beam; 202. a right cross member; 203. a right triangular slot; 204. a right threaded hole; 205. a right screw; 206. a right vertical plate; 207. a circular socket; 208. a right triangular insert; 209. a right thread groove; 210. a right socket; 211. a notch; 3. a connecting mechanism; 301. a screw; 302. a limiting slide bar; 303. a sliding sleeve; 304. a limiting block; 305. an L-shaped inserted link; 306. a spring; 4. a fastening mechanism; 401. a fixed block; 402. an anchor rod.

Detailed Description

The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention based on the embodiments of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "provided", "sleeved/connected", "connected", and the like are to be understood in a broad sense, such as "connected", which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1:

referring to fig. 1 to 7, a protective barrier for a foundation pit of a construction engineering, which is easy to disassemble, includes:

the left guard rail 1 is provided with a group of connecting screw holes 107 at the left end and the right end of the left guard rail 1, and two connecting screw holes 107 are formed in each group;

a set of notches 211 are formed in the left end and the right end of the right guard rail 2, two notches 211 are formed in each set, and circular sockets 207 are formed in the inner wall of each set of notches 211; and

coupling mechanism 3, coupling mechanism 3 can dismantle the setting between left rail guard 1 and right rail guard 2, and coupling mechanism 3 is provided with four groups, wherein:

each group of connecting mechanisms 3 comprises a screw 301, a limit slide bar 302, a sliding sleeve 303, limit blocks 304, an L-shaped inserted bar 305 and a spring 306, the screw 301 is in threaded connection with a connecting screw hole 107, the screw 301 is in threaded fit with the connecting screw hole 107, so that the installation and the disassembly between the screw 301 and the left guard rail 1 can be rapidly realized, the limit slide bar 302 is fixedly arranged on the circumferential surface of the screw 301 far away from the connecting screw hole 107, the sliding sleeve 303, the limit blocks 304 and the L-shaped inserted bar 305 are respectively provided with two limit blocks 304 which are respectively fixedly arranged at the upper end and the lower end of the limit slide bar 302, the two sliding sleeves 303 are movably sleeved on the circumferential surface of the limit slide bar 302 and can freely slide, the limit slide bar 302 is used as a guide rail for the movement of the two sliding sleeves 303, so that the limit slide bar 302 can slide along the limit slide bar, its specific elastic coefficient selection should be selected according to actual need by oneself, so no longer detailed description, it is specific, the movable hole has all been seted up at the top of two sliding sleeves 303, sliding sleeve 303 passes through sliding fit between movable hole and the spacing slide bar 302, the diameter of stopper 304 is greater than the aperture in movable hole, stopper 304 is used for restricting sliding sleeve 303 and spacing slide bar 302 separation, spring 306 is fixed to be set up between two sliding sleeves 303, spring 306 has good elastic force effect, under the initial condition: when the spring 306 is in the original state, the two sliding sleeves 303 are respectively abutted to the two limiting blocks 304, the two L-shaped insertion rods 305 are respectively fixedly arranged at the ends of the two sliding sleeves 303 far away from the connecting screw hole 107, the two L-shaped insertion rods 305 are respectively movably inserted into the two circular insertion holes 207, and what needs to be explained is that: after the two sliding sleeves 303 are squeezed, the two sliding sleeves 303 are respectively contacted with the screw 301, at this time, the two L-shaped inserting rods 305 can penetrate into the notches 211, so that the two L-shaped inserting rods 305 can be respectively inserted into the two circular inserting holes 207;

specifically, in the using process of the embodiment: firstly, the screw 301 is matched with the connecting screw hole 107 in a threaded manner to realize detachability, the sliding sleeves 303 can move on the circumferential surface of the limiting sliding rod 302 and are matched with the good elastic force action of the spring 306 to extrude the two sliding sleeves 303, so that the spring 306 is changed from an initial state to a compression state, and the two sliding sleeves 303 are close to each other, so that the two L-shaped insert rods 305 are respectively inserted into the two circular sockets 207, then the spring 306 is reset from the compression state to complete installation, and when the disassembly is needed, only the two sliding sleeves 303 are pressed, so that the L-shaped insert rods 305 are separated from the circular sockets 207 to complete the disassembly;

finally, it is to be noted that: in this embodiment, the left guard rail 1 and the right guard rail 2 are integrated, and the left guard rail 1 and the right guard rail 2 are detachable or not detachable, which is not a technical problem that needs to be solved by this embodiment, but this embodiment implements convenient installation and detachment between the left guard rail 1 and the right guard rail 2, and certainly, this embodiment is not limited to installation and detachment between one left guard rail 1 and one right guard rail 2, and when an additional left guard rail 1 and an additional right guard rail 2 need to be installed, only the additional right guard rail 2 needs to be installed between the left guard rail 1 adjacent to the additional right guard rail, and the additional left guard rail 1 needs to be installed between the right guard rail 2 adjacent to the additional right guard rail.

Example 2:

referring to fig. 1 to 7, based on embodiment 1, the inventor sets the left guard rail 1 and the right guard rail 2 to be detachable, which can satisfy more complicated construction environment and is convenient to carry to the site;

the left guard rail 1 comprises a left vertical beam 101, a left cross beam 102, a left triangular slot 103, a left threaded hole 104, a left screw 105, a left vertical plate 106, a left triangular insert block 108, a left threaded groove 109 and a left socket 110, wherein the left vertical beam 101 and the left cross beam 102 are respectively provided with two, the two left vertical beams 101 are vertically arranged from left to right, the two left cross beams 102 are transversely and detachably arranged between the two left vertical beams 101 from top to bottom, the left threaded hole 104, the left screw 105, the left threaded groove 109 and the left socket 110 are respectively provided with four, the four left threaded holes 104 are respectively arranged on the left side and the right side of the upper ends of the two left cross beams 102, the four left sockets 110 are respectively arranged on the upper end and the lower end of the two left vertical beams 101, the four left threaded grooves 109 are respectively arranged on the bottom walls of the four left sockets 110, each left cross beam 102 is respectively movably clamped between the two left sockets 110, each left screw, a plurality of left risers 106 are arranged, the left risers 106 are arranged in a vertical equidistant mode, a plurality of groups of left triangular inserting blocks 108 are arranged, two left triangular inserting blocks 108 are arranged in each group, the two left triangular inserting blocks 108 are fixedly arranged at the upper end and the lower end of the left riser 106 respectively, two groups of left triangular inserting grooves 103 are arranged at the end parts, close to the two left crossbeams 102, of the left crossbeams respectively, a plurality of left triangular inserting grooves 103 are arranged in each group, and the left triangular inserting blocks 108 are movably inserted into the left triangular inserting grooves 103;

specifically, when the left guard rail 1 needs to be installed: inserting two ends of a left cross beam 102 positioned on the lower side between two left insertion holes 110 positioned on the lower side respectively, then completing installation of two left screws 105 positioned on the lower side in sequence, inserting a left triangular insertion block 108 positioned on the lower side into a left triangular insertion slot 103 positioned on the lower side in sequence to complete insertion, thereby installing a plurality of left vertical plates 106, then inserting two ends of a left cross beam 102 positioned on the upper side between two left insertion holes 110 positioned on the upper side respectively, and respectively enabling the left triangular insertion blocks 108 positioned on the upper side to be inserted into the left triangular insertion slots 103 positioned on the upper side in a one-to-one correspondence manner, and finally completing installation of the two left screws 105 positioned on the upper side, thereby completing installation of the left protective guard 1;

the right guard rail 2 comprises a right vertical beam 201, a right cross beam 202, a right triangular slot 203, a right threaded hole 204, a right screw 205, a right vertical plate 206, a right triangular insert block 208, a right threaded groove 209 and a right socket 210, wherein the right vertical beam 201 and the right cross beam 202 are respectively provided with two, the two right vertical beams 201 are vertically arranged from left to right, the two right cross beams 202 are transversely and detachably arranged between the two right vertical beams 201 from top to bottom, the right threaded hole 204, the right screw 205, the right threaded groove 209 and the right socket 210 are respectively provided with four, the four right threaded holes 204 are respectively arranged at the left and right sides of the upper ends of the two right cross beams 202, the four right sockets 210 are respectively arranged at the upper and lower ends of the two right vertical beams 201, the four right threaded grooves 209 are respectively arranged at the bottom walls of the four right sockets 210, each right cross beam 202 is movably clamped between the two right sockets 210, each right screw 205 is respectively, the number of the right vertical plates 206 is multiple, the right vertical plates 206 are arranged in a vertical equidistant mode, the right triangular insertion blocks 208 are provided with multiple groups, two right triangular insertion blocks 208 are arranged in each group, the two right triangular insertion blocks 208 are fixedly arranged at the upper end and the lower end of each right vertical plate 206 respectively, the right triangular insertion grooves 203 are provided with two groups, the two groups of right triangular insertion grooves 203 are arranged at the end parts, close to the two right cross beams 202, of the two groups of right triangular insertion grooves 203 respectively, the number of the right triangular insertion grooves 203 in each group is multiple, and the right triangular insertion blocks 208 are movably inserted into the;

similarly, according to the steps of the left guard rail 1, the right guard rail 2 can be mounted and dismounted;

it should be noted that: the connection screw hole 107 in embodiment 2 is disposed on the left vertical beam 101, and similarly, the notch 211 is disposed on the right vertical beam 201, and the specific position thereof can be easily obtained from embodiment 1, and therefore, the details are not repeated;

example 3:

referring to fig. 1-7, embodiment 3 is further optimized on the basis of embodiment 2, because the protective barriers are placed on the ground, they will fall over, and in embodiment 3, in order to place the protective barriers more firmly, the following scheme is adopted:

the utility model discloses still include the fastening device 4 who sets up on left rail guard 1 and right rail guard 2, specifically, fastening device 4 is provided with four groups, and each group fastening device 4 all includes fixed block 401 and stock 402, and stock 402 is fixed to be set up in the bottom of fixed block 401, and wherein two fixed blocks 401 are fixed respectively and are set up the tip downside that two left vertical beams 101 kept away from mutually, and two other fixed blocks 401 are fixed respectively and are set up the tip downside that two right vertical beams 201 kept away from mutually;

by inserting the anchor 402 below the ground, a secure placement is achieved, making it less prone to toppling.

The above description is only the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution and the improvement concept of the present invention within the technical scope disclosed in the present invention.

Claims

1. The utility model provides a building engineering is protection guardrail for foundation ditch convenient to dismantle, its characterized in that includes:

the left guard rail and the right guard rail are respectively provided with a group of connecting screw holes (107), and two connecting screw holes (107) are formed in each group of the left guard rail (1);

the left end and the right end of the right guard rail (2) are respectively provided with a group of notches (211), two notches (211) are arranged in each group, and the inner wall of each group of notches (211) is provided with a circular socket (207); and

coupling mechanism (3), coupling mechanism (3) can dismantle the setting between left rail guard (1) and right rail guard (2), coupling mechanism (3) are provided with four groups, wherein:

each group of connecting mechanism (3) comprises a screw rod (301), a limiting slide rod (302), sliding sleeves (303), limiting blocks (304), L-shaped insert rods (305) and springs (306), the screw rod (301) is in threaded connection with the connecting screw hole (107), the limiting slide rods (302) are fixedly arranged on the circumferential surface of the screw rod (301) far away from the connecting screw hole (107), the sliding sleeves (303), the limiting blocks (304) and the L-shaped insert rods (305) are respectively provided with two, the two limiting blocks (304) are respectively fixedly arranged at the upper end and the lower end of the limiting slide rod (302), the two sliding sleeves (303) are movably sleeved on the circumferential surface of the limiting slide rod (302) and can freely slide, the springs (306) are fixedly arranged between the two sliding sleeves (303), and the two L-shaped insert rods (305) are respectively fixedly arranged at the end parts of the two sliding sleeves (303) far away from the connecting screw hole (107), the two L-shaped insertion rods (305) are movably inserted into the two circular insertion holes (207) respectively.

2. The conveniently-disassembled protective guardrail for the foundation pit of the building engineering as claimed in claim 1, wherein the left protective guardrail (1) comprises left vertical beams (101), left cross beams (102), left triangular slots (103), left threaded holes (104), left screws (105), left risers (106), left triangular insertion blocks (108), left threaded grooves (109) and left insertion ports (110), two of the left vertical beams (101) and the left cross beams (102) are arranged, two of the left vertical beams (101) are vertically arranged from left to right, two of the left cross beams (102) are vertically and detachably arranged between the two left vertical beams (101), four of the left threaded holes (104), four of the left screws (105), four of the left threaded grooves (109) and four of the left insertion ports (110) are arranged, and the four of the left threaded holes (104) are respectively arranged at the left and right sides of the upper ends of the two left cross beams (102), four left sockets (110) are respectively arranged at the upper and lower ends of two left vertical beams (101), four left thread grooves (109) are respectively arranged at the bottom wall of the four left sockets (110), each left cross beam (102) is movably connected between the two left sockets (110), each left screw (105) is respectively in threaded connection between a left threaded hole (104) and the left thread groove (109), a plurality of left vertical plates (106) are arranged in a vertical equidistant manner, a plurality of groups of left triangular insertion blocks (108) are arranged, each group of left triangular insertion blocks (108) is provided with two, two left triangular insertion blocks (108) are respectively and fixedly arranged at the upper and lower ends of the left vertical plates (106), two groups of left triangular insertion grooves (103) are respectively arranged at the end parts which are close to the two left cross beams (102), each group of left triangular slots (103) is provided with a plurality of left triangular insertion blocks (108) which are movably inserted into the left triangular slots (103).

3. The conveniently-disassembled protective fence for the foundation pit of the building engineering as claimed in claim 2, wherein the right protective fence (2) comprises right vertical beams (201), right cross beams (202), right triangular slots (203), right threaded holes (204), right screws (205), right risers (206), right triangular inserts (208), right threaded grooves (209) and right sockets (210), two of the right vertical beams (201) and the right cross beams (202) are respectively arranged, two of the right vertical beams (201) are vertically arranged from left to right, two of the right cross beams (202) are vertically and vertically detachably arranged between the two right vertical beams (201), four of the right threaded holes (204), four of the right screws (205), four of the right threaded grooves (209) and four of the right sockets (210) are respectively arranged at the left and right sides of the upper ends of the two right cross beams (202), four right sockets (210) are respectively arranged at the upper end and the lower end of two right vertical beams (201), four right thread grooves (209) are respectively arranged at the bottom walls of the four right sockets (210), each right cross beam (202) is movably connected between the two right sockets (210), each right screw (205) is respectively in threaded connection between a right threaded hole (204) and the right thread groove (209), the right vertical plates (206) are provided with a plurality of right vertical plates (206) which are vertically arranged at equal intervals, the right triangular insert blocks (208) are provided with a plurality of groups, each group of right triangular insert blocks (208) is provided with two, the two right triangular insert blocks (208) are respectively and fixedly arranged at the upper end and the lower end of the right vertical plates (206), the right triangular insert grooves (203) are provided with two groups, and the right triangular insert grooves (203) are respectively arranged at the end parts which are close to the two right cross beams (202), each group of right triangular slots (203) are provided with a plurality of right triangular insertion blocks (208) which are movably inserted into the right triangular slots (203).

4. The easy-to-dismount protective fence for foundation pit of building engineering according to claim 3, characterized in that, it further comprises a fastening mechanism (4) arranged on the left protective fence (1) and the right protective fence (2).

5. The conveniently-disassembled protective guardrail for the foundation pit of the building engineering as claimed in claim 4, wherein the fastening mechanisms (4) are provided with four groups, each group of the fastening mechanisms (4) comprises a fixing block (401) and an anchor rod (402), the anchor rods (402) are fixedly arranged at the bottoms of the fixing blocks (401), two fixing blocks (401) are respectively and fixedly arranged at the lower sides of the ends, far away from the two left vertical beams (101), of the two fixing blocks (401), and the other two fixing blocks (401) are respectively and fixedly arranged at the lower sides of the ends, far away from the two right vertical beams (201).

6. The easy-to-dismount protective fence for the foundation pit of the building engineering as claimed in any one of claims 1 to 5, wherein the top of each of the two sliding sleeves (303) is provided with a movable hole, the sliding sleeves (303) are in sliding fit with the limiting sliding rods (302) through the movable holes, and the diameter of the limiting blocks (304) is larger than the diameter of the movable holes.