A safety protection enclosure device for the edge of a foundation pit

Abstract

The invention discloses a safety protection enclosure device for the edge of a foundation pit, which belongs to the technical field of safety protection enclosures and solves the problem that the protection device is inconvenient to be installed on the four corners of the edge of the foundation pit, thus affecting the protection effect. The invention comprises a middle connecting piece, wherein the middle connecting piece comprises a base, a swivel seat is symmetrically installed on both sides of the base, two longitudinal rods are symmetrically installed on the top of one end of the base, a top plate is installed on the top of the longitudinal rod, an expansion slot is provided on the side of the two longitudinal rods away from each other, a storage slot is provided on the outer wall of the longitudinal rod in a direction of ninety degrees to the expansion slot, a clamping support unit is installed inside the base, a bottom placing piece is installed on the swivel seat, and a front protection piece is installed on the longitudinal rod; the invention protects the edge of the foundation pit by setting a bottom plate and a protection plate when the bottom plate and the protection plate are unfolded, and at the same time, when the bottom plate and the protection plate on one side are unfolded, the two protection plates are in a vertical state, so that the equipment can be installed at the corner conveniently.

Description

Technical Field

[0001] The invention belongs to the technical field of safety protection enclosures, and specifically relates to a safety protection enclosure device for the edge of a foundation pit. Background Art

[0002] The foundation pit is a soil pit excavated at the foundation design location according to the base elevation and foundation plane dimensions. The foundation pit is a temporary project. Its function is to provide a space so that the foundation masonry work can be carried out according to the position specified in the design. If the excavation is not deep, the slope can be used to stabilize the soil slope. If the excavation is deep or there are buildings nearby, it is necessary to set up supports on the inner wall of the foundation pit. At the same time, safety protection devices are set around the foundation pit to prevent people from accidentally falling into it and getting injured. The method usually adopted by construction workers is to install protection devices around the foundation pit for protection. The protection devices generally consist of a bottom plate set on the ground and a vertically set protection plate. The bottom plate and the protection plate are set vertically, and the bottom plate and the protection plate are supported by support rods. However, there are the following defects:

[0003] The protective device is not convenient to disassemble and store. Due to the setting of the bottom plate and the protective plate, it is not convenient to install the protective device at the four corners formed by the protective devices on the four sides of the edge of the foundation pit, which affects the protective effect. Summary of the invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a foundation pit edge safety protection enclosure device, which effectively solves the problem that the protection device is inconvenient to install on the four corners of the foundation pit edge, affecting the protection effect.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a foundation pit edge safety protection enclosure device, comprising a middle connecting member, the middle connecting member comprising a base, swivel seats are symmetrically installed on both sides of the base, two longitudinal rods are symmetrically installed on the top of one end of the base, a top plate is installed on the top of the longitudinal rods, both sides of the two longitudinal rods away from each other are provided with an expansion slot, and the outer wall of the longitudinal rod at a 90-degree direction with the expansion slot is provided with a storage slot, and a clamping support unit is installed inside the base;

[0006] A bottom placing piece is installed on the rotating seat, and a front protection piece is installed on the longitudinal rod;

[0007] The bottom placement piece includes a bottom plate arranged on the side of the base, a rotating sleeve is installed on the side of the bottom plate close to the base, the rotating sleeve is rotatably connected with the rotating seat, the bottom plate is used for support, and a supporting piece is installed on the bottom plate;

[0008] The front protection member includes a protection plate, one end of which is provided with a rotation groove, and the protection plate is rotatably connected to the longitudinal rod through the rotation groove;

[0009] When the device is unfolded, the two bottom plates are unfolded parallel to the base, and the ends of the two protective plates are touched after being unfolded. When the device is stored, the two protective plates are rotated to the top of the base, and the two bottom plates are rotated upward to the side where the two protective plates are away from each other.

[0010] Preferably, the snap-on support unit includes an internal groove opened inside the base, a connecting groove is opened at the top of the internal groove, a limit plate is movably installed inside the internal groove, snap-on blocks are symmetrically installed at the top of the limit plate, and compression springs are installed at the four corners of the bottom end of the limit plate, and the bottom end of the compression spring is fixedly connected to the inner bottom wall of the internal groove.

[0011] Preferably, when the protective plate is in the expanded state, the end of the clamping block contacts the surface of the protective plate, and when the protective plate is in the retracted state, the clamping block contacts the inside of the bottom clamping slot. The bottom clamping slot is opened at the bottom end of the protective plate, and an end slide slot is opened at the end of the internal slot away from the longitudinal rod. A foot plate is installed at the end of the limit plate close to the end slide slot, and the foot plate passes through the end slide slot and is located on the outside of the base.

[0012] Preferably, the support member includes a storage groove opened at the top of the bottom plate, a support rod is arranged inside the storage groove, an end shaft is installed at the bottom end of the support rod, the end shaft is rotatably connected to the inner wall of the storage groove, a top slot is opened at the top of the support rod, when the support rod is supporting, the support rod is inserted into the support groove, the support groove is opened on the surface of the protective plate, and a snap-on connection unit is installed inside the protective plate.

[0013] Preferably, the snap-connecting unit includes a movable groove opened inside the protective plate, the movable groove is located above the supporting groove, a bottom groove is opened at the bottom end of the movable groove, the bottom groove passes through the inside of the supporting groove, a movable block is movably installed inside the movable groove, a bottom clamping block is installed at the bottom end of the movable block, the bottom clamping block passes through the bottom groove to the inside of the supporting groove, the bottom end of the bottom clamping block is clamped into the top clamping groove, a reset spring is symmetrically installed at the top of the movable block, the top of the reset spring is fixedly connected to the inner top wall of the movable groove, and an auxiliary snap-connecting unit is installed inside the protective plate.

[0014] Preferably, a top groove is provided at the top of the movable groove, the top groove passes through to the top of the protective plate, a longitudinal plate is installed at the top of the movable block, the top of the longitudinal plate passes through the top groove to the top of the protective plate, and a top clamp is fixedly installed at the top of the longitudinal plate. When the bottom plate and the protective plate are stored, the top clamp is inserted into the side clamp groove, and the side clamp groove is provided on the side of the bottom plate away from the base.

[0015] Preferably, the auxiliary clamping unit includes a transverse slot opened inside the protective plate, the transverse slot is located on the side of the movable slot close to the longitudinal rod, a first rod slot is opened on the side of the transverse slot close to the rotating slot, the first rod slot penetrates into the first rod slot, the first rod slot penetrates into the interior of the rotating slot, a moving block is slidably installed inside the transverse slot, a clamping rod is installed on the side of the moving block close to the first rod slot, and the clamping rod is located inside the first rod slot.

[0016] Preferably, a second rod groove is provided on the side of the transverse displacement groove away from the first rod groove, a limit rotation groove is provided at one end of the second rod groove, the limit rotation groove is located on the back of the movable groove, and the limit rotation groove is communicated with the movable groove, a gear is rotatably installed inside the limit rotation groove, a screw is installed on one side of the gear, the screw passes through the second rod groove to the inside of the transverse displacement groove, a screw groove is provided inside the moving block, the screw is threadedly installed inside the screw groove, and tooth grooves are evenly provided on the back of the longitudinal plate, and the gears are meshed with the tooth grooves.

[0017] Preferably, when the longitudinal plate moves upward, the screw rod is driven to rotate by the gear, and the card rod is driven to completely enter the first rod groove through the screw groove. When the longitudinal plate moves downward, the card rod is driven to move outward. When the protective plate is unfolded, the card rod is inserted into the unfolding card groove. When the protective plate is retracted, the card rod is inserted into the retracting card groove.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1) During operation, the bottom plate is installed on the rotating seat on the side of the base through rotation, and the protective plate is installed on the longitudinal rod through rotation. When the bottom plate and the protective plate are unfolded, the bottom plate is perpendicular to the protective plate, and the two protective plates are on the same plane to protect the edge of the foundation pit. At the same time, when the bottom plate and the protective plate on one side are unfolded, the two protective plates are in a vertical state, which is convenient for installing the equipment in the corner and protecting the corner position of the edge of the foundation pit;

[0020] 2) During operation, when the protective plate is in the unfolded state, the end of the clamping block is in close contact with the surface of the protective plate, so that the end of the clamping block supports the protective plate to improve the protective effect. At the same time, when the protective plate is stored, the clamping block is inserted into the bottom card slot at the bottom of the protective plate, so that the protective plate can be stored conveniently and the equipment can be disassembled and assembled conveniently;

[0021] 3) During operation, when the bottom plate and the protective plate are unfolded and in a vertical state, the support rod is rotated toward the protective plate, and one end of the support rod enters the support groove, and at the same time, the bottom end of the bottom clamping block is clamped into the top clamping groove to ensure that the support rod supports the protective plate and improve the protective effect. At the same time, the bottom plate and the protective plate are clamped and installed to improve the installation stability. When the protective plate and the bottom plate are stored, the top clamping block is clamped into the side clamping groove for easy storage;

[0022] 4) During operation, when the longitudinal plate is pulled upward, the gear and the screw are driven to rotate through the tooth groove, and then the clamping rod is driven to completely enter the first rod groove through the screw groove, so that the protective plate is disengaged from the longitudinal rod, which facilitates the rotation and expansion of the protective plate. After the longitudinal plate moves back, it drives the clamping rod to move outward. When the protective plate is expanded, the clamping rod is inserted into the expansion clamping groove, and when the protective plate is stored, the clamping rod is inserted into the storage clamping groove, thereby improving the installation stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0024] In the attached picture:

[0025] Figure 1 It is a schematic structural diagram of a foundation pit edge safety protection enclosure device of the present invention;

[0026] Figure 2 It is a schematic diagram of the structure of the middle connecting piece of the present invention;

[0027] Figure 3 It is a schematic diagram of the structure of the clamping support unit of the present invention;

[0028] Figure 4 This is a schematic diagram of the connection structure between the bottom plate and the protective plate of the present invention;

[0029] Figure 5 It is a schematic diagram of the structure of the bottom placement piece of the present invention;

[0030] Figure 6 It is a schematic diagram of the side structure of the bottom plate of the present invention;

[0031] Figure 7 It is a schematic diagram of the structure of the card connection unit of the present invention;

[0032] Figure 8 It is a schematic diagram of the longitudinal plate structure of the present invention;

[0033] Fig. 9 It is a schematic diagram of the structure of the auxiliary card connection unit of the present invention;

[0034] Fig.10 It is a schematic diagram of the structure of the moving block of the present invention;

[0035] Fig.11 It is a schematic diagram of the foundation pit edge safety protection enclosure device of the present invention in a semi-folded state;

[0036] Fig.12 It is a schematic diagram of the fully folded state of the foundation pit edge safety protection enclosure device of the present invention.

[0037] In the figure: 1. middle connecting member; 101. base; 102. rotating seat; 103. longitudinal rod; 104. top plate; 105. unfolding slot; 106. storage slot; 107. card support unit; 1071. internal slot; 1072. connecting slot; 1073. limit plate; 1074. card block; 1075. compression spring; 1076. end slide slot; 1077. foot plate; 2. bottom placement member; 201. bottom plate; 202. rotating sleeve; 203. storage slot; 204. support rod; 205. end shaft; 206. top slot; 207. side slot; 3. front protection member; 301. anti Guard plate; 302, rotating groove; 303, supporting groove; 304, bottom clamping groove; 305, clamping connection unit; 3051, movable groove; 3052, bottom groove; 3053, top groove; 3054, movable block; 3055, bottom clamping block; 3056, reset spring; 3057, longitudinal plate; 3058, top clamping block; 306, auxiliary clamping unit; 3061, transverse groove; 3062, first rod groove; 3063, second rod groove; 3064, limit rotating groove; 3065, moving block; 3066, clamping rod; 3067, screw rod; 3068, screw groove; 3069, gear; 30610, tooth groove. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only 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 ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0039] Depend on Figure 1-12The present invention relates to a foundation pit edge safety protection enclosure device, comprising a middle connecting member 1, the middle connecting member 1 comprises a base 101, swivel seats 102 are symmetrically installed on both sides of the base 101, two longitudinal rods 103 are symmetrically installed on the top of one end of the base 101, a top plate 104 is installed on the top of the longitudinal rod 103, an expansion card slot 105 is provided on the side of the two longitudinal rods 103 away from each other, and a storage card slot 106 is provided on the outer wall of the longitudinal rod 103 at a ninety-degree direction to the expansion card slot 105, a clamping support unit 107 is installed inside the base 101, a bottom placement member 2 is installed on the swivel seat 102, a front protection member 3 is installed on the longitudinal rod 103, the bottom placement member 2 comprises a bottom plate 201 arranged on the side of the base 101, and a rotating sleeve 202 is installed on the side of the bottom plate 201 close to the base 101 The rotating sleeve 202 is rotatably connected to the rotating seat 102, the bottom plate 201 is used for support, and a support member is installed on the bottom plate 201. The front protective member 3 includes a protective plate 301, and a rotating groove 302 is opened at one end of the protective plate 301. The protective plate 301 is rotatably connected to the longitudinal rod 103 through the rotating groove 302. The bottom plate 201 is rotatably installed on the rotating seat 102 on the side of the base 101, and the protective plate 301 is rotatably installed on the longitudinal rod 103. When the bottom plate 201 and the protective plate 301 are unfolded, the bottom plate 201 is perpendicular to the protective plate 301, and the two protective plates 301 are in the same plane, so as to protect the edge of the foundation pit. At the same time, when the bottom plate 201 and the protective plate 301 on one side are unfolded, the two protective plates 301 are in a vertical state, so that the equipment can be installed in the corner conveniently, so as to protect the corner position at the edge of the foundation pit.

[0040] The clamping support unit 107 includes an internal groove 1071 opened inside the base 101, a connecting groove 1072 is opened at the top of the internal groove 1071, a limit plate 1073 is movably installed inside the internal groove 1071, and a clamping block 1074 is symmetrically installed on the top of the limit plate 1073. Compression springs 1075 are installed at the four corners of the bottom end of the limit plate 1073. The bottom end of the compression spring 1075 is fixedly connected to the inner bottom wall of the internal groove 1071. When the protective plate 301 is in the expanded state, the end of the clamping block 1074 contacts the surface of the protective plate 301. When the protective plate 301 is in the stored state, the clamping block 1074 contacts the inside of the bottom clamping groove 304. The bottom clamping groove 304 is opened. At the bottom end of the protective plate 301, an end groove 1076 is provided at one end of the internal groove 1071 away from the longitudinal rod 103, and a foot plate 1077 is installed at one end of the limiting plate 1073 close to the end groove 1076. The foot plate 1077 passes through the end groove 1076 and is located on the outside of the base 101. When the protective plate 301 is in the expanded state, the end of the clamping block 1074 is in close contact with the surface of the protective plate 301, so that the end of the clamping block 1074 supports the protective plate 301 to improve the protective effect. At the same time, when the protective plate 301 is stored, the clamping block 1074 is inserted into the bottom clamping groove 304 at the bottom end of the protective plate 301, thereby facilitating the storage of the protective plate 301 and facilitating the disassembly and assembly of the equipment.

[0041] The support member includes a storage groove 203 opened at the top of the bottom plate 201, a support rod 204 is arranged inside the storage groove 203, an end shaft 205 is installed at the bottom end of the support rod 204, the end shaft 205 is rotatably connected to the inner wall of the storage groove 203, a top card slot 206 is opened at the top of the support rod 204, when the support rod 204 is supporting, the support rod 204 is inserted into the support groove 303, the support groove 303 is opened on the surface of the protective plate 301, and a card connection unit 305 is installed inside the protective plate 301, and the card connection unit 305 includes a movable groove 306 opened inside the protective plate 301. 051, the movable groove 3051 is located above the supporting groove 303, the bottom end of the movable groove 3051 is provided with a bottom groove 3052, the bottom groove 3052 penetrates into the interior of the supporting groove 303, the interior of the movable groove 3051 is movably installed with a movable block 3054, the bottom end of the movable block 3054 is installed with a bottom clamping block 3055, the bottom clamping block 3055 penetrates through the bottom groove 3052 to penetrate into the interior of the supporting groove 303, the bottom end of the bottom clamping block 3055 is clamped into the interior of the top clamping groove 206, the top of the movable block 3054 is symmetrically installed with a return spring 3056, the top of the return spring 3056 is symmetrically connected to the movable The inner top wall of the groove 3051 is fixedly connected, an auxiliary card unit 306 is installed inside the protective plate 301, a top groove 3053 is opened at the top of the movable groove 3051, and the top groove 3053 penetrates to the top of the protective plate 301, and a longitudinal plate 3057 is installed at the top of the movable block 3054. The top of the longitudinal plate 3057 passes through the top groove 3053 to the top of the protective plate 301, and a top card block 3058 is fixedly installed on the top of the longitudinal plate 3057. When the bottom plate 201 and the protective plate 301 are stored, the top card block 3058 is inserted into the inside of the side card groove 207, and the side card groove 207 is opened at the bottom When the plate 201 is on one side away from the base 101 and the bottom plate 201 and the protective plate 301 are unfolded and in a vertical state, the support rod 204 is rotated toward the protective plate 301, and one end of the support rod 204 enters the support groove 303. At the same time, the bottom end of the bottom clamping block 3055 is clamped into the top clamping groove 206 to ensure that the support rod 204 supports the protective plate 301 to improve the protective effect. At the same time, the bottom plate 201 and the protective plate 301 are clamped and installed to improve the installation stability. When the protective plate 301 and the bottom plate 201 are stored, the top clamping block 3058 is clamped into the side clamping groove 207 for easy storage.

[0042] The auxiliary clamping unit 306 includes a transverse slot 3061 opened inside the protective plate 301, the transverse slot 3061 is located on the side of the movable slot 3051 close to the longitudinal rod 103, a first rod slot 3062 is opened on the side of the transverse slot 3061 close to the rotating slot 302, the first rod slot 3062 penetrates the first rod slot 3062, the first rod slot 3062 penetrates the inside of the rotating slot 302, a moving block 3065 is slidably installed inside the transverse slot 3061, a clamping rod 3066 is installed on the side of the moving block 3065 close to the first rod slot 3062, and the clamping rod 3066 is located in the first rod slot 3062 The second rod groove 3063 is provided on the side of the transverse displacement groove 3061 away from the first rod groove 3062, and a limited rotation groove 3064 is provided at one end of the second rod groove 3063. The limited rotation groove 3064 is located on the back of the movable groove 3051, and the limited rotation groove 3064 is connected with the movable groove 3051. A gear 3069 is rotatably installed inside the limited rotation groove 3064, and a screw rod 3067 is installed on one side of the gear 3069. The screw rod 3067 passes through the second rod groove 3063 to the inside of the transverse displacement groove 3061. A screw groove 3068 is provided inside the moving block 3065, and the screw 3067 is threadedly installed to Inside the screw groove 3068, tooth grooves 30610 are evenly opened on the back of the longitudinal plate 3057, and the gear 3069 is meshed with the tooth groove 30610. When the longitudinal plate 3057 moves upward, the screw rod 3067 is driven to rotate through the gear 3069, and the clamping rod 3066 is driven to completely enter the first rod groove 3062 through the screw groove 3068. When the longitudinal plate 3057 moves downward, the clamping rod 3066 is driven to move outward. When the protective plate 301 is unfolded, the clamping rod 3066 is inserted into the unfolding clamping groove 105. When the protective plate 301 is stored, the clamping rod 3066 is inserted into the storage clamping groove 106. When the longitudinal plate 3057 is pulled upward, the gear 3069 and the screw 3067 are driven to rotate through the tooth groove 30610, and then the locking rod 3066 is driven to completely enter the first rod groove 3062 through the screw groove 3068, so that the protective plate 301 is disengaged from the longitudinal rod 103, which facilitates the rotation and expansion of the protective plate 301. After the longitudinal plate 3057 moves back, it drives the locking rod 3066 to move outward. When the protective plate 301 is expanded, the locking rod 3066 is inserted into the expansion slot 105. When the protective plate 301 is stored, the locking rod 3066 is inserted into the storage slot 106, thereby improving the installation stability.

[0043] Working principle: When it is necessary to carry out safety protection on the edge of the foundation pit, pull the longitudinal plate 3057 upwards so that the top block 3058 is disengaged from the side slot 207, then expand the two bottom plates 201 outwards to be parallel to the base 101, place the bottom plate 201 on the ground, then step on the foot plate 1077 with your foot, thereby driving the limit plate 1073 to move downwards, so that the clamping block 1074 is disengaged from the bottom slot 304, and the two protective plates 301 are rotated outwards so that the two protective plates 301 are in the same plane and are arranged vertically with the bottom plate 201, then release the foot plate 1077, at this time, the limit plate 1073 moves back upwards under the elastic force of the compression spring 1075, so that the end of the clamping block 1074 is in close contact with the surface of the protective plate 301, generating a supporting force for the protective plate 301, thereby improving the protective effect;

[0044] When the longitudinal plate 3057 moves upward, the gear 3069 is driven to rotate through the tooth groove 30610. Since the screw rod 3067 is threadedly connected with the screw groove 3068, the clamping rod 3066 is driven to completely enter the first rod groove 3062. When the longitudinal plate 3057 moves back downward, the gear 3069 is driven to rotate in the opposite direction through the tooth groove 30610, thereby driving the clamping rod 3066 to move outward and be clamped into the deployment clamping groove 105, thereby fixing the protective plate 301 and improving the protective effect. At the same time, when the protective plate 301 is stored, the clamping rod 3066 can be clamped into the storage clamping groove 106 to store and fix the protective plate 301.

[0045] When the bottom plate 201 and the protective plate 301 are in a vertical state, the support rod 204 inside the receiving groove 203 on the bottom plate 201 is rotated toward the side of the protective plate 301 until the end of the support rod 204 is pressed into the support groove 303. When the longitudinal plate 3057 is pulled upward, the end of the support rod 204 smoothly enters the support groove 303, and the longitudinal plate 3057 is loosened to move it back, so that the bottom end of the longitudinal plate 3057 is inserted into the top slot 206, thereby clamping and fixing the support rod 204, so that the support rod 204 supports the protective plate 301, improving the protection stability. At the same time, the bottom plate 201 and the protective plate 301 are connected by the support rod 204 to ensure the installation stability.

[0046] When the equipment needs to be stored, the longitudinal plate 3057 is pulled upward, the support rod 204 is rotated back to the inside of the storage slot 203, the foot plate 1077 is stepped on to move the clamping block 1074 downward, and then the protective plate 301 is rotated back to the top of the base 101, and then the foot plate 1077 is released, so that the limit plate 1073 moves upward to clamp the clamping block 1074 into the bottom clamping slot 304 to fix the protective plate 301, and then the two bottom plates 201 are rotated upward to the side where the two bottom plates 201 are away from each other, and then the longitudinal plate 3057 is released, so that the longitudinal plate 3057 moves back to clamp the top clamping block 3058 into the side clamping slot 207 to fix the two bottom plates 201, and at the same time, the longitudinal plate 3057 moves back to drive the clamping rod 3066 to move outward and clamp it into the storage slot 106;

[0047] When it is necessary to protect the corners at the edge of the foundation pit, it is only necessary to unfold the bottom plate 201 and the protective plate 301 on one side of the base 101, while keeping the bottom plate 201 and the protective plate 301 on the other side in the stowed state, so that the two bottom plates 201 form a vertical state, which is convenient for installing the equipment in the corner for protection.

[0048] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0049] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A foundation pit edge safety protection enclosure device, comprising a middle connecting piece (1), characterized in that: The middle connecting member (1) comprises a base (101), a rotating seat (102) is symmetrically mounted on both sides of the base (101), two longitudinal rods (103) are symmetrically mounted on the top of one end of the base (101), a top plate (104) is mounted on the top of the longitudinal rods (103), an expansion slot (105) is provided on the side of the two longitudinal rods (103) away from each other, a storage slot (106) is provided on the outer wall of the longitudinal rods (103) at a 90-degree angle to the expansion slot (105), and a clamping support unit (107) is mounted inside the base (101); The clamping support unit (107) comprises an internal groove (1071) provided inside the base (101), a connecting groove (1072) provided at the top of the internal groove (1071), a limit plate (1073) movably installed inside the internal groove (1071), a clamping block (1074) symmetrically installed at the top of the limit plate (1073), a compression spring (1075) installed at each of the four corners of the bottom end of the limit plate (1073), the bottom end of the compression spring (1075) being fixedly connected to the inner bottom wall of the internal groove (1071), and when the protective plate (301) is in the unfolded state, the clamping block The end of the (1074) contacts the surface of the protective plate (301). When the protective plate (301) is in the storage state, the clamping block (1074) is clamped into the bottom clamping groove (304). The bottom clamping groove (304) is opened at the bottom end of the protective plate (301). An end slide groove (1076) is opened at one end of the internal groove (1071) away from the longitudinal rod (103). A foot plate (1077) is installed at one end of the limiting plate (1073) close to the end slide groove (1076). The foot plate (1077) passes through the end slide groove (1076) and is located on the outside of the base (101); A bottom placement piece (2) is installed on the rotating seat (102), and a front protection piece (3) is installed on the longitudinal rod (103); The bottom placement member (2) comprises a bottom plate (201) arranged on the side of the base (101); a rotating sleeve (202) is installed on the side of the bottom plate (201) close to the base (101); the rotating sleeve (202) is rotatably connected to the rotating seat (102); the bottom plate (201) is used for support, and a support member is installed on the bottom plate (201); The front protection member (3) includes a protection plate (301) provided on one end of which a rotation groove (302) is provided. The protection plate (301) is rotationally connected to the longitudinal rod (103) via the rotation groove (302). When the device is unfolded, the two bottom plates (201) are unfolded to be parallel to the base (101). The ends of the two protection plates (301) are in contact after being unfolded. When the device is stored, the two protection plates (301) are rotated to the top of the base (101), and the two bottom plates (201) are rotated upward to a side where the two protection plates (301) are away from each other. The support member comprises a storage groove (203) formed at the top of the bottom plate (201); a support rod (204) is arranged inside the storage groove (203); an end shaft (205) is installed at the bottom end of the support rod (204); the end shaft (205) is rotatably connected to the inner wall of the storage groove (203); a top clamping groove (206) is formed at the top of the support rod (204); when the support rod (204) is used for support, the support rod (204) is inserted into the support groove (303); the support groove (303) is formed on the surface of the protective plate (301); and a clamping connection unit (305) is installed inside the protective plate (301); The snap-on connection unit (305) comprises a movable groove (3051) provided inside the protective plate (301), the movable groove (3051) being located above the support groove (303), a bottom groove (3052) being provided at the bottom end of the movable groove (3051), the bottom groove (3052) penetrating into the interior of the support groove (303), a movable block (3054) being movably installed inside the movable groove (3051), a bottom clamping block (3055) being installed at the bottom end of the movable block (3054), the bottom clamping block (3055) penetrating into the interior of the support groove (303) through the bottom groove (3052), the bottom end of the bottom clamping block (3055) being snapped into the interior of the top clamping groove (206), a return spring (3056) being symmetrically installed at the top end of the movable block (3054), the return spring (3056) The top of the movable block (3054) is fixedly connected to the inner top wall of the movable groove (3051); an auxiliary clamping unit (306) is installed inside the protective plate (301); a top groove (3053) is opened at the top of the movable groove (3051); the top groove (3053) penetrates to the top of the protective plate (301); a longitudinal plate (3057) is installed at the top of the movable block (3054); the top of the longitudinal plate (3057) passes through the top groove (3053) to the top of the protective plate (301); a top clamping block (3058) is fixedly installed at the top of the longitudinal plate (3057); when the bottom plate (201) and the protective plate (301) are stored, the top clamping block (3058) is clamped into the inside of the side clamping groove (207); the side clamping groove (207) is opened on the side of the bottom plate (201) away from the base (101).

2. A foundation pit edge safety protection enclosure device according to claim 1, characterized in that: The auxiliary clamping unit (306) comprises a transverse displacement groove (3061) provided inside the protective plate (301), the transverse displacement groove (3061) being located on a side of the movable groove (3051) close to the longitudinal rod (103), a first rod groove (3062) being provided on a side of the transverse displacement groove (3061) close to the rotating groove (302), the first rod groove (3062) penetrating into the interior of the rotating groove (302), a moving block (3065) being slidably installed inside the transverse displacement groove (3061), a clamping rod (3066) being installed on a side of the moving block (3065) close to the first rod groove (3062), the clamping rod (3066) being located inside the first rod groove (3062).

3. A foundation pit edge safety protection enclosure device according to claim 2, characterized in that: The side of the transverse displacement groove (3061) away from the first rod groove (3062) is provided with a second rod groove (3063), one end of the second rod groove (3063) is provided with a limit rotation groove (3064), the limit rotation groove (3064 is located on the back of the movable groove (3051), and the limit rotation groove (3064) is connected to the movable groove (3051), and a gear (3069) is rotatably installed inside the limit rotation groove (3064), and the gear (3069) is connected to the movable groove (3051). A screw rod (3067) is installed on one side of the longitudinal plate (3057), the screw rod (3067) passes through the second rod groove (3063) to the inside of the transverse groove (3061), a screw groove (3068) is opened inside the moving block (3065), the screw rod (3067) is threadedly installed inside the screw groove (3068), and tooth grooves (30610) are evenly opened on the back side of the longitudinal plate (3057), and the gear (3069) is meshed with the tooth grooves (30610).

4. A foundation pit edge safety protection enclosure device according to claim 3, characterized in that: When the longitudinal plate (3057) moves upward, the gear (3069) drives the screw rod (3067) to rotate, and the screw groove (3068) drives the clamping rod (3066) to completely enter the first rod groove (3062). When the longitudinal plate (3057) moves downward, the clamping rod (3066) is driven to move outward. When the protective plate (301) is unfolded, the clamping rod (3066) is clamped into the unfolding clamping groove (105). When the protective plate (301) is retracted, the clamping rod (3066) is clamped into the retracting clamping groove (106).

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