Foundation pit dewatering device

Abstract

The utility model discloses a foundation pit dewatering device, which relates to the technical field of foundation pit construction and comprises a sleeve, a plurality of water inlet holes distributed in an annular array are arranged on the lower portion of the sleeve, a limit plate is slidably mounted in the sleeve, a through hole is arranged in the middle of the limit plate, a floating part is mounted below the limit plate, and a support rod penetrating through the through hole in a sliding manner is fixed at the upper end of the floating part. The limiting plate and the trigger switch are movably installed, the driving piece is installed, the limiting plate and the trigger switch can be driven by the driving piece to ascend and descend, the limiting plate and the trigger switch can be driven by the driving piece to ascend and descend, the limiting plate and the trigger switch can be driven to ascend and descend, and the limiting plate and the trigger switch can be driven to ascend and descend. And when the height of the limiting plate is changed, the heights of the floating piece, the induction piece and the proximity switch are driven to be changed, so that the purpose of changing the initial height of the floating piece can be achieved, and the rainfall requirements of different water levels are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of foundation pit construction, in particular to a foundation pit dewatering device. BACKGROUND

[0002] The foundation pit dewatering refers to the dewatering work for ensuring that the foundation pit can be constructed under dry conditions, preventing the side slope instability, foundation quicksand, pit bottom uplift, pit bottom piping and foundation bearing capacity reduction when the underground water level is higher than the excavation bottom surface during the excavation of the foundation pit.

[0003] According to the patent file with the announcement number "CN210066795U", a kind of foundation pit dewatering device is disclosed, it is related to foundation pit dewatering field, including pumping mechanism and start-stop mechanism, start-stop mechanism and pumping mechanism are electrically connected, wherein, water pump extracts the underground water of the periphery of foundation pit, when the water level of underground water drops, floating assembly drives slide rod and inductive sheet to slide down, when approaching switch senses inductive sheet, approaching switch stops water pump by wire;When the water level of underground water rises, floating assembly drives slide rod and inductive sheet to slide up synchronously, when approaching switch does not sense inductive sheet, approaching switch starts water pump by wire, to effectively replace manual observation and control the start-stop of water pump, realizes the automatic start-stop of water pump according to the water level range of underground water in the process of foundation pit dewatering, guarantees the stability of underground water level.

[0004] Based on the above search, combined with prior art, it is found that in the use process of start-stop mechanism, according to the change of underground water level of foundation pit and dewatering demand, the installation position of internal element (such as the starting height of floating piece, the installation position of trigger switch, etc.) needs to be adjusted to meet the use demand under different conditions, but the existing start-stop mechanism is buried underground (or in well) when used, and the internal installed elements are mostly fixed installation, which is inconvenient to adjust, and is relatively inconvenient in actual use, so a kind of foundation pit dewatering device is needed. UTILITY MODEL CONTENT

[0005] The purpose of the present application is to provide a kind of foundation pit dewatering device to solve the problems raised in the above background.

[0006] To achieve the above purpose, the present application provides the following technical scheme: a kind of foundation pit dewatering device, including sleeve pipe, the lower part of sleeve pipe is provided with the multiple water inlet holes of annular array distribution, slidingly installed in sleeve pipe the limiting plate, the middle part of limiting plate is provided with through hole;

[0007] Limiting plate lower installation has floating piece, and the upper end of floating piece is fixed with the support rod sliding through the through hole;

[0008] The upper end of the supporting rod of the floating member is fixed with a sensing sheet, and the sensing sheet is located above the limiting plate;

[0009] A proximity switch is fixed above the limiting plate by a fixing member, and when the bottom surface of the sensing sheet is attached to the upper surface of the limiting plate, the proximity switch is located above the sensing sheet;

[0010] A trigger switch is movably installed above the limiting plate, and the trigger switch is higher than the proximity switch;

[0011] A driving member is fixed to the inner wall of the sleeve, and the driving member is used to control the lifting of the limiting plate and the trigger switch.

[0012] As a further supplement to the present scheme, the driving member includes a double-rod hydraulic cylinder, the double-rod hydraulic cylinder is fixed to the inner wall of the sleeve, a first piston rod and a second piston rod are respectively arranged on the double-rod hydraulic cylinder, the first piston rod extends downward and is fixed to one side of the upper surface of the limiting plate, the first piston rod is located outside the sensing sheet and on the side away from the proximity switch;

[0013] The second piston rod extends upward and is fixedly connected with the trigger switch through a connecting member.

[0014] As a further supplement to the present scheme, a plurality of limiting grooves are arranged equidistantly on the inner wall of the sleeve, and the limiting grooves are annular grooves;

[0015] An elastic support ring is fixed to the outside of the limiting plate, and the elastic support ring is embedded in the limiting groove and is in interference fit with the inner wall of the limiting groove.

[0016] As a further supplement to the present scheme, at least two elastic support rings are provided, the at least two elastic support rings are distributed and arranged at intervals, and the at least two elastic support rings are respectively clamped into two limiting grooves corresponding to the middle interval one limiting groove on the circumferential side of the limiting plate.

[0017] As a further supplement to the present scheme, the fixing member includes a fixing frame, the lower end of the fixing frame is fixed to the upper surface of the limiting plate, and the upper end of the fixing frame is fixed to the lower end of the proximity switch through bolts;

[0018] The connecting member includes a mounting rod, one end of the mounting rod is fixed to the upper end of the trigger switch, and the other end of the mounting rod is fixed to the upper end of the second piston rod.

[0019] As another improvement of the present application, the driving member includes a first single-rod hydraulic cylinder and a second single-rod hydraulic cylinder, the first single-rod hydraulic cylinder is fixed to the inner wall of the sleeve, the piston rod of the first single-rod hydraulic cylinder extends upward, the upper end of the piston rod of the first single-rod hydraulic cylinder is fixedly connected with the trigger switch through a mounting rod, the second single-rod hydraulic cylinder is fixed to the inner wall of the sleeve, and the piston rod of the second single-rod hydraulic cylinder extends downward and is fixed to the upper surface of the limiting plate;

[0020] The first single-rod hydraulic cylinder, the second single-rod hydraulic cylinder and the proximity switch are arranged along the circumference of the middle axis of the sleeve and are spaced apart.

[0021] In conclusion, the technical effects and advantages of the utility model are as follows:

[0022] 1. In the utility model, the limiting plate and the trigger switch are movably installed, and a driving element is installed, so that the limiting plate and the trigger switch can be lifted by the driving element, thereby facilitating the adjustment of the height of the limiting plate and the trigger switch.

[0023] In addition, the proximity switch is fixedly connected with the limiting plate, so that the proximity switch can change the same height as the floating element when the height of the floating element is changed, and the two can still be well matched for use before and after adjustment, thereby achieving the purpose of controlling the start and stop of the water pump.

[0024] 2. In the utility model, the limiting groove and the elastic supporting ring are used in cooperation, so that the limiting plate and the sleeve form an interference fit when the limiting plate is in a stopped state, thereby providing stable support for the limiting plate. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0026] Figure 1 It is the overall structure schematic view in embodiment 1.

[0027] Figure 2 It is the overall structure schematic view in embodiment 1. Figure 1

[0028] Figure 3 It is the overall structure schematic view in embodiment 1.

[0029] Figure 4 It is the overall structure schematic view in embodiment 2.

[0030] ​In the figure: 1, sleeve; 11, water inlet hole; 12, limiting groove; 2, limiting plate; 21, through hole; 22, elastic support ring; 23, fixing frame; 3, floating piece; 4, induction sheet; 5, proximity switch; 6, trigger switch; 61, mounting rod; 7, double-rod hydraulic cylinder; 71, first piston rod; 72, second piston rod; 8, first single-rod hydraulic cylinder; 9, second single-rod hydraulic cylinder. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0032] Embodiment 1

[0033] Reference Figures 1-3 As shown in the figure, a foundation pit dewatering device comprises a sleeve 1, a plurality of water inlet holes 11 are arranged in an annular array at the lower part of the sleeve 1, a limiting plate 2 is slidably installed in the sleeve 1, a through hole 21 is formed in the middle of the limiting plate 2;

[0034] A floating piece 3 is installed below the limiting plate 2, and a support rod is fixed to the upper end of the floating piece 3 and slides through the through hole 21;

[0035] An induction sheet 4 is fixed to the upper end of the support rod of the floating piece 3, and the induction sheet 4 is located above the limiting plate 2;

[0036] A proximity switch 5 is fixed above the limiting plate 2 by a fixing member, the fixing member comprises a fixing frame 23, the lower end of the fixing frame 23 is fixed to the upper surface of the limiting plate 2, and the upper end of the fixing frame 23 is fixed to the lower end of the proximity switch 5 by bolts, when the bottom surface of the induction sheet 4 is attached to the upper surface of the limiting plate 2, the proximity switch 5 is located above the induction sheet 4;

[0037] A trigger switch 6 is movably installed above the limiting plate 2, and the trigger switch 6 is higher than the proximity switch 5;

[0038] A driving member is fixed to the inner wall of the sleeve 1, and the driving member is used to control the lifting of the limiting plate 2 and the trigger switch 6.

[0039] By movably installing the limiting plate 2 and the trigger switch 6 and installing the driving member, the limiting plate 2 and the trigger switch 6 can be lifted by the driving member, so as to facilitate the adjustment of the height of the limiting plate 2 and the trigger switch 6, when the height of the limiting plate 2 changes, the height of the floating piece 3, the induction sheet 4 and the proximity switch 5 also changes, so as to achieve the purpose of changing the initial height of the floating piece 3, and the dewatering requirement of different water levels can be met;

[0040] In addition, by fixing the proximity switch 5 and the limiting plate 2, the proximity switch 5 can be changed at the same height as the floating member 3, so that they can be well matched before and after adjustment to achieve the purpose of controlling the opening and closing of the water pump.

[0041] It should be noted that the foundation pit dewatering device should also include other structures for realizing the dewatering function which are not disclosed in the embodiment and have been disclosed in the prior art (such as a water pump, a water filter pipe, etc.), since the other structures and working principles of the foundation pit dewatering device are all prior art (disclosed in the patent document with the publication number “CN210066795U”), which will not be described here.

[0042] Further, the driving member includes a double-rod hydraulic cylinder 7 fixed to the inner wall of the sleeve 1, and the double-rod hydraulic cylinder 7 is provided with a first piston rod 71 and a second piston rod 72, respectively. The first piston rod 71 extends downward and is fixed to one side of the upper surface of the limiting plate 2, and the first piston rod 71 is located outside the inductive sheet 4 and on the side away from the proximity switch 5.

[0043] The second piston rod 72 extends upward and is fixedly connected to the trigger switch 6 through a connecting member. The connecting member includes a mounting rod 61, one end of which is fixed to the upper end of the trigger switch 6, and the other end of which is fixed to the upper end of the second piston rod 72.

[0044] Through the arrangement of the double-rod hydraulic cylinder 7, after the double-rod hydraulic cylinder 7 is started, the first piston rod 71 and the second piston rod 72 respectively drive the limiting plate 2 and the trigger switch 6 to move up and down, thereby achieving the purpose of changing the floating member 3, the inductive sheet 4, the proximity switch 5, and the trigger switch 6, and ultimately realizing the effect of adapting to different foundation pit conditions for drainage. The adjustment has high synchronization, and the relative positions of the components after adjustment are stable, and the cooperation effect is good.

[0045] Further, a plurality of limiting grooves 12 are arranged equidistantly on the inner wall of the sleeve 1, and the limiting grooves 12 are annular grooves.

[0046] The outer side of the limiting plate 2 is fixedly provided with an elastic supporting ring 22 made of an elastic material (such as rubber, silicone, and elastic sponge) commonly used in the prior art and suitable for the embodiment. The elastic supporting ring 22 is embedded in the limiting groove 12 and is in interference fit with the inner wall of the limiting groove 12.

[0047] The cross-sectional area of the elastic supporting ring 22 in the initial state is larger than that of the limiting groove 12. The limiting groove 12 is an expanded groove with a larger opening diameter and a smaller inner diameter, and the cross section is semicircular, triangular, trapezoidal, or other cross-sectional shapes with a larger opening, so as to facilitate the embedding of the elastic supporting ring 22 and achieve a good compression effect on the elastic supporting ring 22.

[0048] By the cooperation of the limiting groove 12 and the elastic support ring 22, when the limiting plate 2 is in a stop state, an interference fit is formed between the limiting plate 2 and the sleeve 1, thereby providing stable support effect for the limiting plate 2, and when the limiting plate 2 is supported, the stress on the piston rod of the double-rod hydraulic cylinder 7 can be reduced, so that the load of the double-rod hydraulic cylinder 7 when not started is reduced, thereby avoiding the double-rod hydraulic cylinder 7 being in a high load state for a long time when not started, prolonging the service life of the double-rod hydraulic cylinder 7 to a certain extent, and reducing the probability of damage.

[0049] In order to improve the support stability of the limiting plate 2, the elastic support ring 22 is provided with at least two elastic support rings 22, which are distributed and spaced apart upward and downward, and the at least two elastic support rings 22 are respectively clamped into two limiting grooves 12 corresponding to the middle one limiting groove 12 on the circumferential side of the limiting plate 2.

[0050] Embodiment 2

[0051] A foundation pit dewatering device shown in reference 4 is different from embodiment 1 in that the driving member includes a first single-rod hydraulic cylinder 8 and a second single-rod hydraulic cylinder 9, the first single-rod hydraulic cylinder 8 is fixed to the inner wall of the sleeve 1, and the piston rod of the first single-rod hydraulic cylinder 8 extends upward, the upper end of the piston rod of the first single-rod hydraulic cylinder 8 is fixedly connected to the trigger switch 6 through the mounting rod 61, the second single-rod hydraulic cylinder 9 is fixed to the inner wall of the sleeve 1, and the piston rod of the second single-rod hydraulic cylinder 9 extends downward and is fixed to the upper surface of the limiting plate 2.

[0052] Among them, the first single-rod hydraulic cylinder 8, the second single-rod hydraulic cylinder 9 and the proximity switch 5 are distributed and spaced apart along the central axis of the sleeve 1.

[0053] By providing two separate hydraulic cylinders (the first single-rod hydraulic cylinder 8 and the second single-rod hydraulic cylinder 9), the position of the limiting plate 2 or the trigger switch 6 can be individually adjusted, thereby changing the distance between the sensing sheet 4 and the trigger switch 6, so that the trigger point of the trigger switch 6 is different when it participates in controlling the operation of the water pump, so that the foundation pit dewatering device can be suitable for dewatering operation under different conditions after the position is changed, and the flexibility of the foundation pit dewatering device in use is further improved.

[0054] It should be noted that the double-rod hydraulic cylinder 7 in embodiment 1 and the first single-rod hydraulic cylinder 8 and the second single-rod hydraulic cylinder 9 in embodiment 2 are connected to an external control terminal (not shown in the figure) through a cable, and the control terminal adopts a programmable logic controller (PLC) commonly used in the prior art and suitable for the present embodiment, thereby facilitating the adjustment operation of the staff outside.

[0055] The utility model discloses working principle: in the daily use process, the staff can drive limiting plate 2 and trigger switch 6 lifting through drive part (double -rod hydraulic cylinder 7 or first single -rod hydraulic cylinder 8 and second single -rod hydraulic cylinder 9), thereby conveniently adjusting the height of limiting plate 2 and trigger switch 6, and the height of floating element 3, sensing sheet 4 and proximity switch 5 is changed along with when limiting plate 2 height changes, thereby can reach the purpose of changing floating element 3 initial height, is applicable to the precipitation demand of different water level,

[0056] In addition, by fixing the proximity switch 5 with the limiting plate 2, the proximity switch 5 can be changed to the same height while the height of the floating element 3 is changed, so that the two can still be well used before and after adjustment, achieving the purpose of controlling the opening and closing of the water pump.

[0057] Finally, it should be noted that: the above only for the preferred embodiment of the utility model, and does not limit the utility model, although the utility model has been described in detail with reference to the foregoing embodiments, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or equivalent replacement to part of technical features, any modification, equivalent replacement, improvement etc. within the spirit and principles of the utility model, should be included in the protection scope of the utility model.

Claims

1. A foundation pit dewatering device comprising a sleeve pipe (1) with a plurality of water inlet holes (11) arranged in a ring array in the lower part of the sleeve pipe (1), characterized in that: The sleeve (1) is slidably installed with a limiting plate (2), and a through hole (21) is formed in the middle of the limiting plate (2); A floating piece (3) is installed below the limiting plate (2), and a supporting rod is fixed to the upper end of the floating piece (3) and slidably passes through the through hole (21); The upper end of the supporting rod of the floating piece (3) is fixed with an induction sheet (4), and the induction sheet (4) is located above the limiting plate (2); A proximity switch (5) is fixed above the limiting plate (2) by a fixing piece, and when the bottom surface of the induction sheet (4) is attached to the upper surface of the limiting plate (2), the proximity switch (5) is located above the induction sheet (4); A trigger switch (6) is movably installed above the limiting plate (2), and the trigger switch (6) is higher than the proximity switch (5); A driving piece is fixed to the inner wall of the sleeve (1), and the driving piece is used to control the lifting of the limiting plate (2) and the trigger switch (6).

2. The foundation dewatering device of claim 1, wherein: The driving piece comprises a double-rod hydraulic cylinder (7), the double-rod hydraulic cylinder (7) is fixed to the inner wall of the sleeve (1), a first piston rod (71) and a second piston rod (72) are respectively arranged on the double-rod hydraulic cylinder (7), the first piston rod (71) extends downward and is fixed to one side of the upper surface of the limiting plate (2), the first piston rod (71) is located outside the induction sheet (4) and is located on the side of the induction sheet (4) away from the proximity switch (5); The second piston rod (72) extends upward and is fixedly connected with the trigger switch (6) through a connecting piece.

3. The foundation dewatering device of claim 2, wherein: A plurality of limiting grooves (12) are formed in the inner wall of the sleeve (1) and are arranged equidistantly in up-down direction, and the limiting grooves (12) are annular grooves; An elastic supporting ring (22) is fixed to the outer side of the limiting plate (2), the elastic supporting ring (22) is embedded in the limiting groove (12) and is in interference fit with the inner wall of the limiting groove (12).

4. The foundation dewatering device of claim 3, wherein: The elastic supporting ring (22) is provided with at least two, and the at least two elastic supporting rings (22) are distributed and spaced in up-down direction, and the at least two elastic supporting rings (22) are respectively clamped into two limiting grooves (12) corresponding to the middle interval one limiting groove (12) on the circumferential side of the limiting plate (2).

5. The foundation dewatering device of claim 2, wherein: The fixing piece comprises a fixing frame (23), the lower end of the fixing frame (23) is fixed to the upper surface of the limiting plate (2), and the upper end of the fixing frame (23) is fixed to the lower end of the proximity switch (5) through a bolt; The connecting piece comprises a mounting rod (61), one end of the mounting rod (61) is fixed to the upper end of the trigger switch (6), and the other end of the mounting rod (61) is fixed to the upper end of the second piston rod (72).

6. The foundation dewatering device of claim 1, wherein: The driving piece comprises a first single-rod hydraulic cylinder (8) and a second single-rod hydraulic cylinder (9), the first single-rod hydraulic cylinder (8) is fixed to the inner wall of the sleeve (1), the piston rod of the first single-rod hydraulic cylinder (8) extends upward, the upper end of the piston rod of the first single-rod hydraulic cylinder (8) is fixedly connected with the trigger switch (6) through the mounting rod (61), the second single-rod hydraulic cylinder (9) is fixed to the inner wall of the sleeve (1), and the piston rod of the second single-rod hydraulic cylinder (9) extends downward and is fixed to the upper surface of the limiting plate (2). The first single-rod hydraulic cylinder (8), the second single-rod hydraulic cylinder (9) and the proximity switch (5) are distributed along the circumference of the central axis of the sleeve (1) and are arranged at intervals.

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