Foundation quality detection device for building construction

Abstract

The invention discloses a building construction foundation quality detection device, and belongs to the technical field of detection devices.The building construction foundation quality detection device comprises a support, the support is slidably sleeved with a sleeve, the sleeve is fixedly sleeved with a balance weight hammer, and the support is fixedly sleeved with a limiting ring matched with the sleeve; wherein the ratio of the diameter of the limiting ring to the inner diameter of the sleeve is 1.2-1.3, so that the sleeve moving downwards along the bracket is limited by the limiting ring; the support is provided with a detection mechanism used for detecting the state of the support. Whether the support is in a vertical state or not can be detected through the straightening mechanism, and it is ensured that the support is in the vertical state in the detection process. Through mutual cooperation of the ball, the lubricating oil, the sponge, the exhaust groove and the air supply mechanism, when the lubricating oil is discharged, under the action of the sponge, the lubricating oil can uniformly cover the surface of the support, when the counterweight hammer moves downwards, the resistance borne by the counterweight hammer is reduced, and when the counterweight hammer collides with the limiting ring, the impact force is transmitted to the support through the limiting ring, so that the detection precision is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of detection devices, in particular to a building construction foundation quality detection device. BACKGROUND

[0002] In the process of standard penetration test, the tester first lifts the drop hammer assembly along the measuring rod to a preset scale position, and then releases the counterweight hammer to freely fall along the guide rod. By controlling the drop distance to realize kinetic energy conversion, the hammer impact kinetic energy is used to drive the measuring rod to penetrate into the foundation soil layer. After repeated impact, the final penetration depth is measured, and the number of hammer blows is combined to comprehensively evaluate the dynamic bearing characteristics of the foundation soil. Through the corresponding relationship between energy transmission and soil deformation, the compactness and mechanical response parameters of the foundation soil layer can be effectively obtained.

[0003] However, in the prior art, the counterweight hammer has a significant shaking problem during free falling. This shaking will cause the counterweight hammer to come into unintended contact with the side wall of the support, generating a large frictional resistance. This frictional resistance will significantly consume the falling kinetic energy of the counterweight hammer, thereby adversely affecting the accuracy of the detection results. Especially in high-precision detection situations, the kinetic energy loss caused by friction will significantly increase the detection error, seriously affecting the measurement accuracy and reliability of the detection equipment.

[0004] Therefore, a building construction foundation quality detection device is proposed. SUMMARY

[0005] In view of the problems in the prior art, the purpose of the present application is to provide a building construction foundation quality detection device that can reduce the error caused by wear between the counterweight hammer and the side wall of the support during falling.

[0006] To solve the above problems, the present application adopts the following technical solutions.

[0007] A building construction foundation quality detection device, comprising a support, a sleeve is slidably arranged on the support, a counterweight hammer is fixedly arranged outside the sleeve, a limiting ring cooperating with the sleeve is fixedly arranged on the support; The support is provided with a detection mechanism for detecting the state of the support; Uniformly arranged mounting holes are formed in the inner side wall of the sleeve, and rolling balls are movably arranged in the mounting holes; a baffle is fixedly arranged on the support, the baffle is located above the sleeve; a liquid storage cavity is formed in the support, lubricating oil is arranged in the liquid storage cavity; uniformly arranged pressure relief valves with output ends communicating with the outside are arranged on the side wall of the liquid storage cavity, and a pressurizing mechanism for pressurizing the liquid storage cavity is arranged on the support; An annular cavity is formed in the sleeve, the annular cavity is located below the mounting hole, an annular exhaust groove is formed in the side wall of the annular cavity close to the support, the exhaust groove is inclined upward, and a gas supply mechanism for supplying gas to the annular cavity is arranged on the limiting ring.

[0008] Further, the support is provided with an annular flow guide cavity, the output end of the pressure relief valve extends into the flow guide cavity, the side wall of the flow guide cavity is uniformly provided with oil discharge holes in communication with the outside, the oil discharge holes are uniformly circumferentially distributed on the side wall of the support, a circular sponge is sleeved on the side wall of the support, and the sponge covers the outside of the oil discharge holes.

[0009] Further, the top end and the bottom end of the sleeve are respectively provided with an upper bellow and a lower bellow, the upper bellow and the lower bellow are both sleeved on the outside of the support, the top end of the upper bellow is fixedly connected with the bottom wall of the baffle, the top wall of the limiting ring is provided with an annular groove, and the bottom end of the lower bellow is fixedly connected with the bottom wall of the annular groove.

[0010] Further, the pressurizing mechanism comprises a pressurizing cavity formed in the upper bellow, a guide pipe extending into the liquid storage cavity is fixedly arranged on the side wall of the pressurizing cavity, the guide pipe is located above the pressure relief valve, lubricating oil is arranged in the pressurizing cavity and the guide pipe, and the support is provided with a backflow mechanism for enabling the lubricating oil to flow back to the liquid storage cavity.

[0011] Further, the gas supply mechanism comprises a cavity formed in the lower bellow, and a gas pipe extending into the annular cavity is arranged on the side wall of the cavity.

[0012] Further, the backflow mechanism comprises a one-way valve fixedly embedded on the bottom wall of the liquid storage cavity, the output end of the one-way valve is in communication with the liquid storage cavity, a circulation pipe is fixedly arranged on the side wall of the annular groove, and the end of the circulation pipe away from the annular groove is in communication with the input end of the one-way valve.

[0013] Further, the detection mechanism comprises a mounting plate horizontally fixedly installed on the top end of the support, a connecting rope is fixedly installed on the bottom wall of the mounting plate, and a plumb bob is fixedly installed on the bottom end of the connecting rope.

[0014] Further, a circular annular float is slidably installed in the liquid storage cavity, and a friction plate is fixedly sleeved on the side wall of the float.

[0015] Further, the bottom wall of the baffle is provided with a circular annular groove, an air bag is fixedly installed in the circular annular groove, and the bottom wall of the air bag is located outside the circular annular groove. The top wall of the circular annular groove is provided with a through hole penetrating through the baffle, the output end of the air bag extends into the through hole, a scale is vertically and slidably arranged in the through hole, the output end of the air bag is fixedly connected with the side wall of the through hole, and the side wall of the scale is provided with a mark.

[0016] Further, the upper bellow and the lower bellow are both made of rubber material.

[0017] Compared with the prior art, the present application has the following beneficial effects: (1) the scheme through the ball, lubricating oil, sponge, exhaust groove and air supply mechanism of mutual cooperation, when the lubricating oil is discharged, under the action of sponge, lubricating oil can evenly cover the surface of the bracket, under the weight of the weight hammer, reduce the resistance received by the weight hammer, when the weight hammer hits the limit ring, the impact force is transmitted to the bracket through the limit ring, improve the detection accuracy.

[0018] (2) the scheme through the upper corrugated pipe, lower corrugated pipe and annular groove of mutual cooperation, when the lubricating oil is applied on the surface of the bracket, can prevent lubricating oil leakage, played a role in saving cost, at the same time under the action of annular groove, make sleeve and weight hammer can directly contact with limit ring, make the weight hammer can transmit impact force to limit ring, further improve the detection accuracy.

[0019] (3) the scheme through the one-way valve, circulation pipe of mutual cooperation, the lubricating oil on the surface of the bracket under the action of gravity along the side wall of the bracket down, finally flow into the annular groove. When the sleeve down, the upper corrugated pipe is stretched, at this time, the negative pressure state in the pressurizing cavity, under the action of catheter, the liquid storage cavity is also in negative pressure environment, at this time, the liquid storage cavity through the one-way valve and circulation pipe from the annular groove to absorb lubricating oil, so as to make the lubricating oil backflow to the liquid storage cavity, played a role in saving cost. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is the overall structure of the present application schematic diagram; Figure 2 is the front view structure of the present application schematic diagram; Figure 3 is the present application Figure 2 A place of enlarged structure schematic diagram; Figure 4 is the present application Figure 2 B place of enlarged structure schematic diagram; Figure 5 is the present application Figure 2 C place of enlarged structure schematic diagram; Figure 6 is the top view structure of the present application schematic diagram; Figure 7 is the combination structure of the present application floating block and friction plate schematic diagram.

[0021] Explanation of figure mark: 1, support; 2, sleeve; 3, counterweight; 4, limit ring; 5, ball; 6, baffle; 7, liquid storage cavity; 8, pressure relief valve; 9, annular cavity; 10, exhaust groove; 11, flow guide cavity; 12, oil drain hole; 13, sponge; 14, upper corrugated tube; 15, lower corrugated tube; 16, annular groove; 17, pressurizing cavity; 18, conduit; 19, cavity; 20, air pipe; 21, one-way valve; 22, circulation pipe; 23, mounting plate; 24, connecting rope; 25, plumb bob; 26, float; 27, friction plate; 28, circular ring groove; 29, air bag; 30, jack; 31, scale; 32, mark. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0023] Please refer to Figures 1 to 7 A building construction foundation quality detection device, comprising a support 1, a sleeve 2 is slidably arranged on the support 1, a counterweight 3 is fixedly arranged outside the sleeve 2, and a limit ring 4 matched with the sleeve 2 is fixedly arranged on the support 1; wherein the ratio of the diameter of the limit ring 4 to the inner diameter of the sleeve 2 is 1.2-1.3, so that the sleeve 2 moving downward along the support 1 will be limited by the limit ring 4; The support 1 is provided with a detection mechanism for detecting the state of the support 1; the detection mechanism can detect whether the support 1 is in a vertical state through a righting mechanism, so as to ensure that the support 1 is in a vertical state during the detection process; Uniform mounting holes are formed in the inner side wall of the sleeve 2, and balls 5 are movably arranged in the mounting holes; when the balls 5 are arranged, there is a gap between the sleeve 2 and the support 1, a baffle 6 is fixedly arranged on the support 1, and the baffle 6 is located above the sleeve 2, so that the baffle 6 and the limit ring 4 can limit the movement range of the sleeve 2, a liquid storage cavity 7 is formed in the support 1, lubricating oil is contained in the liquid storage cavity 7, pressure relief valves 8 with output ends communicating with the outside are uniformly arranged in the side wall of the liquid storage cavity 7, and a pressurizing mechanism for pressurizing the liquid storage cavity 7 is arranged on the support 1; When detection is needed, first, the support 1 is placed at a to-be-detected position, so that the support 1 is in a vertical state, and a worker holds the support 1, so that the support 1 can move in the vertical direction.

[0024] Then, other workers push the counterweight 3 upward, and in this process, the pressurizing mechanism provides high-pressure gas for the liquid storage cavity 7, at this time, the gas pressure in the liquid storage cavity 7 increases, so that the pressure relief valves 8 open.

[0025] When the pressure relief valve 8 opens, the lubricating oil in the storage cavity 7 is discharged to the outside through the pressure relief valve 8, and the discharged lubricating oil flows downward along the surface of the support 1; When the counterweight 3 moves to the specified height, the counterweight 3 is loosened, and under the action of its own gravity, the counterweight 3 moves downward along the support 1; The sleeve 2 is provided with an annular cavity 9 below the mounting hole, and the annular cavity 9 is provided with an annular exhaust groove 10 on the side wall close to the support 1, the exhaust groove 10 is inclined upward, and the limiting ring 4 is provided with a gas supply mechanism for supplying gas to the annular cavity 9; During the downward movement of the sleeve 2 along the support 1, the gas supply mechanism supplies gas to the annular cavity 9, and the gas in the annular cavity 9 is discharged upward through the exhaust groove 10, at this time, the gas discharged from the exhaust groove 10 flows upward and impacts the lubricating oil on the surface of the support 1, slowing down the downward flow speed of the lubricating oil, thereby ensuring that the contact part of the ball 5 with the support 1 contains an oil film, reducing the friction between the ball 5 and the support 1, and reducing the kinetic energy loss of the counterweight 3.

[0026] When the counterweight 3 hits the limiting ring 4, the impact force is transmitted to the support 1 through the limiting ring 4, at this time, the support 1 moves downward and inserts into the ground, and thus reciprocates, so that the foundation quality can be obtained by observing the depth of the support 1 inserted into the ground.

[0027] As shown in Figure 2 , Figure 3 , the support 1 is provided with an annular flow guide cavity 11, and the output end of the pressure relief valve 8 extends into the flow guide cavity 11, so that the lubricating oil discharged from the pressure relief valve 8 enters the flow guide cavity 11, the side wall of the flow guide cavity 11 is uniformly provided with oil discharge holes 12 communicating with the outside, and the oil discharge holes 12 are uniformly circumferentially distributed on the side wall of the support 1, so that the lubricating oil in the flow guide cavity 11 is discharged through the oil discharge holes 12 and uniformly flows downward along the side wall of the support 1, thereby uniformly smearing the lubricating oil on the surface of the support 1, and the sponge 13 is sleeved on the side wall of the support 1, and the sponge 13 covers the outside of the oil discharge hole 12, so that the lubricating oil flowing out of the oil discharge hole 12 wets the sponge 13, and then uniformly discharges to the surface of the support 1 through the bottom wall of the sponge 13, thereby uniformly smearing the lubricating oil on the surface of the support 1.

[0028] As shown in Figure 2As shown, the top end and the bottom end of the sleeve 2 are respectively provided with the upper bellows 14 and the lower bellows 15, the upper bellows 14 and the lower bellows 15 are sleeved on the outside of the support 1, the top end of the upper bellows 14 is fixedly connected with the bottom wall of the baffle 6, the top wall of the limiting ring 4 is provided with the annular groove 16, the bottom end of the lower bellows 15 is fixedly connected with the bottom wall of the annular groove 16, so when the counterweight 3 drives the sleeve 2 to impact the limiting ring 4, the lower bellows 15 will be completely retracted into the annular groove 16, which ensures that the counterweight 3 can normally impact the limiting ring 4.

[0029] Under the action of the upper bellows 14 and the lower bellows 15, the discharged lubricating oil in the liquid storage cavity 7 can be prevented from leaking to the outside, which plays a role in saving cost and protecting the environment.

[0030] As shown in the figure, Figure 5 The pressurizing mechanism includes the pressurizing cavity 17 provided on the upper bellows 14, the side wall of the pressurizing cavity 17 is fixedly provided with the conduit 18 extending into the liquid storage cavity 7, the conduit 18 is located above the pressure relief valve 8, and the pressurizing cavity 17 and the conduit 18 are both filled with lubricating oil, during the process of the sleeve 2 moving downward along the support 1, the upper bellows 14 is stretched, at this time, the pressurizing cavity 17 absorbs the lubricating oil from the liquid storage cavity 7 through the conduit 18; when the sleeve 2 moves upward along the support 1, the upper bellows 14 is extruded, at this time, the lubricating oil in the pressurizing cavity 17 is discharged into the liquid storage cavity 7 through the conduit 18, so that the pressure in the liquid storage cavity 7 is increased, which plays a role in pressurizing the liquid storage cavity 7, and the support 1 is provided with a backflow mechanism for making the lubricating oil flow back to the liquid storage cavity 7.

[0031] As shown in the figure, Figure 4 The gas supply mechanism includes the cavity 19 provided on the lower bellows 15, the side wall of the cavity 19 is provided with the gas pipe 20 extending into the annular cavity 9; when the sleeve 2 moves downward, the lower bellows 15 is extruded, at this time, the gas in the cavity 19 is discharged into the annular cavity 9 through the gas pipe 20, which plays a role in supplying gas for the annular cavity 9.

[0032] When the sleeve 2 moves upward, the lower bellows 15 is stretched, at this time, the cavity 19 inhales air from the space between the sleeve 2 and the side wall of the support 1 through the gas pipe 20, which plays a role in preparing for the next work.

[0033] As shown in the figure, Figure 2 The backflow mechanism includes the one-way valve 21 fixedly embedded on the bottom wall of the liquid storage cavity 7, the output end of the one-way valve 21 is communicated with the liquid storage cavity 7, the side wall of the annular groove 16 is fixedly provided with the circulation pipe 22, the end of the circulation pipe 22 away from the annular groove 16 penetrates through the limiting ring 4 and the support 1 and is communicated with the input end of the one-way valve 21.

[0034] The lubricating oil on the surface of the support 1 flows downward along the side wall of the support 1 under the action of gravity, and finally flows into the annular groove 16.

[0035] When the sleeve 2 is lowered, the upper corrugated tube 14 is stretched, at this time, the pressurized cavity 17 is in a negative pressure state, under the action of the conduit 18, the liquid storage cavity 7 is also in a negative pressure environment, at this time, the liquid storage cavity 7 absorbs lubricating oil from the annular groove 16 through the one-way valve 21 and the circulation pipe 22, so that the lubricating oil can flow back to the liquid storage cavity 7, and preparation for the next work.

[0036] As shown in Figure 1 , the detection mechanism comprises a mounting plate 23 fixedly installed horizontally at the top end of the support 1, a connecting rope 24 fixedly installed on the bottom wall of the mounting plate 23, a conical plumb 25 fixedly installed at the bottom end of the connecting rope 24, and the tip of the plumb 25 is downward, and the connecting rope 24 is fixedly connected with the top wall center of the plumb 25.

[0037] The connecting rope 24 is directed to the center of the earth by the gravity of the plumb 25, forming an absolutely vertical reference line, after the connecting rope 24 is stationary, the parallelism between the support 1 and the connecting rope 24 is observed, if the support 1 is completely parallel to the connecting rope 24, it indicates that the support 1 is in a vertical state, thereby reducing the probability of the sleeve 2 driving the ball 5 to press the support 1 during the lowering of the sleeve 2, reducing the kinetic energy loss of the sleeve 2, and improving the detection accuracy.

[0038] As shown in Figure 2 , Figure 7 , a circular ring-shaped float 26 is slidingly installed in the liquid storage cavity 7, and a friction plate 27 is fixedly sleeved on the side wall of the float 26, when the liquid storage cavity 7 discharges lubricating oil outward through the pressure relief valve 8, the height of the float 26 changes with the change of the liquid level, the float 26 drives the friction plate 27 to move on the surface of the liquid storage cavity 7, so that heat is generated between the friction plate 27 and the side wall of the liquid storage cavity 7 due to friction, and the heat is transferred to the lubricating oil, thereby improving the flowability of the lubricating oil, and ensuring that the lubricating oil can flow downward along the surface of the support 1 in time.

[0039] As shown in Figure 5 , a circular groove 28 is formed in the bottom wall of the baffle 6, and an air bag 29 is fixedly installed in the circular groove 28; A through hole 30 is formed in the top wall of the circular groove 28 and extends through the baffle 6, the output end of the air bag 29 extends into the through hole 30, a scale 31 is vertically slidably arranged in the through hole 30, and the output end of the air bag 29 is fixedly connected to the side wall of the through hole 30, so that the scale 31 is prevented from falling into the air bag 29 by the output end of the air bag 29, and a mark 32 is arranged on the side wall of the scale 31, when the top wall of the counterweight 3 is completely attached to the bottom wall of the baffle 6, the air bag 29 is squeezed, at this time, the gas in the air bag 29 is discharged into the through hole 30, so that the scale 31 extends out of the through hole 30, when the mark 32 is located on the top wall of the baffle 6, it can be determined that the counterweight 3 is in a horizontal state, if the mark 32 is not extended out of the through hole 30, it indicates that there is a gap between the top wall of the counterweight 3 and the baffle 6, that is, the counterweight 3 may not be in a horizontal state, therefore, through the cooperation of the air bag 29 and the mark 32 on the scale 31, it can be ensured that the top wall of the counterweight 3 is in a horizontal state when the counterweight 3 is released.

[0040] As shown in Figure 1 The upper bellows 14 and the lower bellows 15 are both made of rubber material, the rubber is not easy to crack under repeated deformation, which reduces the damage probability of the upper bellows 14 and the lower bellows 15.

[0041] Method for use: when detection is needed, first place the support 1 at the part to be detected, so that the support 1 is in a vertical state, and the staff holds the support 1, so that the support 1 can move in the vertical direction.

[0042] Then the counterweight 3 is pushed upward by other staff, in this process, the pressurizing mechanism provides high-pressure gas for the liquid storage cavity 7, at this time, the air pressure in the liquid storage cavity 7 increases, so that the pressure relief valve 8 is opened.

[0043] When the pressure relief valve 8 is opened, the lubricating oil in the liquid storage cavity 7 is discharged to the outside through the pressure relief valve 8, and the discharged lubricating oil flows downward along the surface of the support 1; After the counterweight 3 moves to the specified height, the counterweight 3 is released, and under the action of its own gravity, the counterweight 3 moves downward along the support 1; The sleeve 2 is provided with an annular cavity 9 below the mounting hole, an annular exhaust groove 10 is formed in the side wall of the annular cavity 9 close to the support 1, the exhaust groove 10 is inclined upward, and the limiting ring 4 is provided with a gas supply mechanism for supplying gas to the annular cavity 9; During the process of the sleeve 2 moving down along the support 1, the gas supply mechanism supplies gas to the annular cavity 9, and the gas in the annular cavity 9 is discharged upward through the exhaust groove 10, at this time, the gas discharged from the exhaust groove 10 flows upward and impacts the lubricating oil on the surface of the support 1 upward, which slows down the downward flow speed of the lubricating oil, thereby ensuring that the contact position of the ball 5 and the support 1 contains an oil film, which reduces the friction between the ball 5 and the support 1, and reduces the kinetic energy loss of the weight 3.

[0044] When the weight 3 impacts the limiting ring 4, the impact force is transmitted to the support 1 through the limiting ring 4, at this time, the support 1 moves downward and is inserted into the ground, and thus reciprocating, the foundation quality can be obtained by observing the depth of the support 1 inserted into the ground.

[0045] The above merely describes the preferred embodiments of the present application; however, the protection scope of the present application is not limited to this. Any person skilled in the art, according to the technical solution and the improved concept of the present application, can make equivalent replacements or changes within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A construction foundation quality detection device, comprising a bracket (1), a sleeve (2) being provided on a sliding sleeve of the bracket (1), a counterweight (3) being provided on an external fixed sleeve of the sleeve (2), and a limiting ring (4) being provided on a fixed sleeve of the bracket (1) and cooperating with the sleeve (2); Its characteristics are: The bracket (1) is provided with a detection mechanism for detecting the status of the bracket (1); The inner side wall of the sleeve (2) is uniformly provided with mounting holes, and a ball (5) is movably embedded in the mounting hole. A baffle (6) is fixedly sleeved on the bracket (1), and the baffle (6) is located above the sleeve (2). The bracket (1) is provided with a liquid storage cavity (7), and the liquid storage cavity (7) is filled with lubricating oil. A pressure relief valve (8) whose output end is connected to the outside is uniformly embedded on the side wall of the liquid storage cavity (7), and a pressurizing mechanism for pressurizing the liquid storage cavity (7) is provided on the bracket (1); An annular cavity (9) is provided on the sleeve (2), and the annular cavity (9) is located below the mounting hole. An annular exhaust groove (10) is provided on the side wall of the annular cavity (9) close to the bracket (1), and the exhaust groove (10) is inclined upward. An air supply mechanism for supplying air to the annular cavity (9) is provided on the limiting ring (4).

2. A construction foundation quality detection device according to claim 1, characterized in that: An annular flow guide cavity (11) is provided on the bracket (1), and the output end of the pressure relief valve (8) extends into the flow guide cavity (11). Oil drain holes (12) communicating with the outside are evenly provided on the side wall of the flow guide cavity (11). The oil drain holes (12) are evenly distributed on the side wall of the bracket (1). A circular sponge (13) is provided on the side wall of the bracket (1), and the sponge (13) is covered on the outside of the oil drain hole (12).

3. A construction foundation quality detection device according to claim 2, characterized in that: An upper bellows (14) and a lower bellows (15) are respectively installed at the top and bottom ends of the sleeve (2). The upper bellows (14) and the lower bellows (15) are both sleeved on the outside of the bracket (1). The top end of the upper bellows (14) is fixedly connected to the bottom wall of the baffle (6). An annular groove (16) is provided on the top wall of the limiting ring (4). The bottom end of the lower bellows (15) is fixedly connected to the bottom wall of the annular groove (16).

4. A construction foundation quality detection device according to claim 3, characterized in that: The pressurizing mechanism comprises a pressurizing chamber (17) provided on the upper bellows (14); a conduit (18) extending into the liquid storage chamber (7) is fixedly inserted on the side wall of the pressurizing chamber (17); the conduit (18) is located above the pressure relief valve (8); both the pressurizing chamber (17) and the conduit (18) are filled with lubricating oil; and a reflux mechanism for returning the lubricating oil to the liquid storage chamber (7) is provided on the bracket (1).

5. A construction foundation quality detection device according to claim 4, characterized in that: The air supply mechanism comprises a cavity (19) formed on the lower bellows (15), and an air pipe (20) extending into the annular cavity (9) is inserted into the side wall of the cavity (19).

6. A construction foundation quality detection device according to claim 5, characterized in that: The reflux mechanism comprises a one-way valve (21) fixedly embedded in the bottom wall of the liquid storage chamber (7), the output end of the one-way valve (21) being in communication with the liquid storage chamber (7), and a circulation pipe (22) being fixedly inserted into the side wall of the annular groove (16), the end of the circulation pipe (22) away from the annular groove (16) being in communication with the input end of the one-way valve (21).

7. A construction foundation quality detection device according to claim 6, characterized in that: The detection mechanism comprises a mounting plate (23) fixedly mounted horizontally on the top of the bracket (1), a connecting rope (24) fixedly mounted on the bottom wall of the mounting plate (23), and a plumb bob (25) fixedly mounted on the bottom end of the connecting rope (24).

8. The construction foundation quality detection device according to claim 7, characterized in that: A circular floating block (26) is slidably mounted in the liquid storage cavity (7), and a friction plate (27) is fixedly sleeved on the side wall of the floating block (26).

9. The construction foundation quality detection device according to claim 1, characterized in that: A circular groove (28) is formed on the bottom wall of the baffle (6), an air bag (29) is fixedly installed in the circular groove (28), and the bottom wall of the air bag (29) is located outside the circular groove (28); A socket (30) penetrating the baffle (6) is provided on the top wall of the annular groove (28), the output end of the airbag (29) extends into the socket (30), a scale (31) is vertically slidably inserted into the socket (30), and the output end of the airbag (29) is fixedly connected to the side wall of the socket (30), and a mark (32) is provided on the side wall of the scale (31).

10. The construction foundation quality detection device according to claim 3, characterized in that: The upper bellows (14) and the lower bellows (15) are both made of rubber material.

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