Underground pipe gallery concrete shrinkage test detection device

Abstract

The utility model belongs to the technical field of building construction, particularly relates to an underground pipe gallery concrete shrinkage test detection device, and provides the following scheme aiming at the problems that an existing device cannot more accurately obtain concrete shrinkage variable data and cannot perform more real environment simulation on concrete. Comprising a detection box, a movable base, a detection cylinder, a concrete sample block and a U-shaped liquid level pipe, the concrete sample block can be moved to the position tightly attached to the detection cylinder by moving the movable base, initial liquid level data of the U-shaped liquid level pipe can be recorded at the moment, and after a period of time, the concrete sample block can be changed in shape, so that the detection accuracy is improved. When the concrete sample block is contracted, the detection cylinder can generate corresponding actions, namely, liquid in the U-shaped liquid level pipe can be driven to form another liquid level data, the contraction deformation quantity of the concrete sample block can be accurately obtained through the difference value of the two groups of data, and the concrete contraction condition can be tested and detected.

Description

Technical Field

[0001] The utility model relates to a concrete detection device, in particular to an underground pipe gallery concrete shrinkage test detection device, belonging to the technical field of building construction. Background Art

[0002] With the construction and development of urban infrastructure in my country, more and more cities have built integrated pipe corridors, which is an important measure for the rational development and utilization of urban underground space. Underground integrated pipe corridors implement unified planning, design, construction and maintenance. They are municipal public facilities built underground in cities for laying municipal public pipelines. It not only solves the problem of urban traffic congestion, but also greatly facilitates the maintenance and inspection of municipal facilities such as electricity, communications, gas, water supply and drainage. Underground pipe corridors are usually made of prefabricated concrete components, which are then assembled and spliced. When the natural environment changes, concrete will shrink. The shrinkage of concrete will cause cracking of underground pipe corridors. Therefore, the shrinkage performance of concrete needs to be tested before production.

[0003] In the prior art, a concrete shrinkage detection experimental device for underground pipe gallery disclosed in announcement number CN209264725U includes a detector body and a modeling component for pouring concrete samples, a protective box is arranged around the outer side of the detector body, a rotating window is arranged on one side of the protective box, and the protective box is connected to a controller for controlling the temperature and humidity in the protective box; a concrete shrinkage test detection device disclosed in announcement number CN215066680U includes a scale line, a bottom plate and a support plate, and one side of the top of the bottom plate is installed There is a hinge, and a support plate is movably hinged above the hinge, a fixed plate is installed on one side of the top of the support plate, and a movable plate is installed on one side of the fixed plate, and an adjustment mechanism is installed on the inner wall of one side of the support plate; by pulling the pull ring outward, the connecting rod moves outward at the same time, the telescopic spring is stretched and deformed, and then concrete is put into the support plate, after the pull ring is loosened, the telescopic spring is reset to make the connecting rod drive the clamping plate to move inward at the same time, the two sides of the concrete are clamped and fixed by the clamping plate, and then the data of the scale line is recorded, which solves the problem of convenient detection. The prior art detects the shrinkage of concrete by measuring the distance between the plywood. However, since the shrinkage of concrete is often small, the shrinkage variable data of concrete cannot be obtained more accurately by simply measuring the spacing between the plywood, which leads to errors in the actual measurement results. Secondly, the prior art can simulate the real environment by controlling the temperature and humidity during the shrinkage detection of concrete to obtain more accurate variable detection data. However, since the underground pipe gallery is a place that requires ventilation, if only the environmental simulation of temperature and humidity is considered, but the ventilation conditions of the underground pipe gallery are not simulated accordingly, a more realistic simulation environment cannot be obtained, that is, it is also impossible to achieve accurate measurement and detection of the shrinkage of concrete. Utility Model Content

[0004] The utility model provides an underground pipe gallery concrete shrinkage test detection device to solve the problems that the existing device cannot obtain the shrinkage variable data of concrete more accurately and cannot perform more realistic environmental simulation on concrete.

[0005] The utility model achieves the above-mentioned purpose through the following technical scheme: an underground pipe gallery concrete shrinkage test detection device, comprising a detection box, a movable base and a detection cylinder are arranged in the detection box, the detection cylinder is fixedly connected to the box wall of the detection box, the movable base is located on one side of the detection cylinder, a concrete sample block is placed on the movable base, a U-shaped liquid level tube is fixedly connected to the outer wall of the short side box on one side of the detection box, and the detection cylinder is connected to the U-shaped liquid level tube;

[0006] A small constant temperature and humidity machine is fixedly connected to the outer wall of the other short side of the test box, and a circulating fan is fixedly connected to the bottom of the test box. The air inlet and outlet ports of the circulating fan are respectively connected to the long side walls of the test box on both sides;

[0007] A detection push rod, a piston and a spring are arranged in the detection cylinder. One end of the detection push rod is inserted in the detection cylinder, and the other end of the detection push rod is against the end face of the concrete sample block. The piston is movably arranged in the detection cylinder, and the edge of the piston is tightly against the inner wall of the detection cylinder. The spring is compressed and pressed between the piston and the bottom of the detection cylinder. The front and rear ends of the detection cylinder are respectively connected with the two ends of the U-shaped liquid level tube. The detection cylinder and the U-shaped liquid level tube are filled with hydraulic oil. The inner diameter of the detection cylinder is larger than the inner diameter of the U-shaped liquid level tube.

[0008] As a further solution of the utility model: a sealed box cover is clamped at the upper opening of the detection box, and supporting feet are vertically connected to the four corners of the bottom end of the detection box.

[0009] As a further solution of the utility model: a baffle is vertically connected to the side of the movable base away from the detection tube, and a plurality of baffle rods are vertically connected to the side of the baffle close to the detection tube. The movable base is provided with longitudinal supporting teeth and transverse supporting teeth, and the transverse supporting teeth are located on both sides of the longitudinal supporting teeth.

[0010] As a further solution of the utility model: the bottom of the detection box is fixedly connected with a precision linear slide rail, the movable base is movably placed on the rail body of the precision linear slide rail, and the movable base is fixedly connected to the slider of the precision linear slide rail.

[0011] As a further solution of the utility model: the bottom wall of the detection tube is provided with a front end liquid guide interface and a rear end liquid guide interface, and the front end liquid guide interface and the rear end liquid guide interface are respectively connected to the inner cavity of the detection tube on both sides of the piston.

[0012] As a further solution of the utility model: the port tube body and the middle tube body of the U-shaped liquid level tube are fixedly sleeved with a fixing ring, the fixing ring is fixedly connected to the outer wall of the detection box, the two end tube openings of the U-shaped liquid level tube are respectively connected to the front end liquid guide tube and the rear end liquid guide tube, the other end of the front end liquid guide tube is connected to the front end liquid guide interface, and the other end of the rear end liquid guide tube is connected to the rear end liquid guide interface.

[0013] As a further solution of the utility model: scale lines are arranged on the tube bodies on both sides of the U-shaped liquid level tube, and the inside of the U-shaped liquid level tube is also filled with soft rubber blocks, which are installed above the hydraulic oil filled in the vertical tube bodies on both sides of the U-shaped liquid level tube.

[0014] As a further solution of the utility model: the air outlet pipe of the circulating fan is connected with the air inlet duct, the connecting part of the air inlet duct and the air outlet pipe of the circulating fan is installed with an electromagnetic three-way valve, the two ends of the air inlet duct are respectively connected with the long side box walls on both sides of the detection box, the air inlet pipe of the circulating fan is connected with the exhaust duct, the connecting part of the exhaust duct and the air inlet pipe of the circulating fan is installed with an electromagnetic three-way valve, the two ends of the exhaust duct are respectively connected with the long side box walls on both sides of the detection box.

[0015] The beneficial effects of the utility model are:

[0016] 1. The utility model is provided with a detection box, a movable base, a detection tube, a concrete sample block, and a U-shaped liquid level tube. The detection tube is connected with the U-shaped liquid level tube. The concrete sample block can be placed on the movable base to achieve positioning and installation of the concrete sample block, and the concrete sample block can be moved to a position close to the detection tube by moving the movable base. At this time, the initial liquid level data of the U-shaped liquid level tube can be recorded. After a period of time, the concrete sample block can change its shape, which will cause the detection tube to produce a corresponding action, that is, it can drive the liquid in the U-shaped liquid level tube to form another liquid level data. Through the difference between the two sets of data, the shrinkage deformation of the concrete sample block can be accurately obtained, that is, the shrinkage of the concrete can be tested.

[0017] 2. The detection box provided in the utility model is connected with a small constant temperature and humidity machine and a circulating fan. The humidity and temperature in the detection box can be adjusted by the small constant temperature and humidity machine, and the gas in the detection box can be driven to flow by the circulating fan to simulate the concrete sample block in an environment with different temperature, humidity and different ventilation conditions for concrete shrinkage detection, that is, it can more realistically simulate the actual environment of the underground pipe gallery where the concrete is located.

[0018] 3. The detection cylinder of the utility model is provided with a detection push rod, a piston and a spring. The front and rear ends of the detection cylinder are respectively connected with the two ends of the U-shaped liquid level tube. The detection cylinder and the U-shaped liquid level tube are filled with hydraulic oil. The inner diameter of the detection cylinder is larger than the inner diameter of the U-shaped liquid level tube, so that when the concrete sample block shrinks, a gap is generated between the concrete sample block and the detection push rod, and then the piston is pushed by the spring to push the detection push rod to the outside of the detection cylinder, so that the detection push rod is always against the end face of the concrete sample block, that is, it can drive the hydraulic oil between the detection cylinder and the U-shaped liquid level tube to produce a liquid level change, and if the concrete sample When the concrete block expands, the concrete sample block will push the detection push rod toward the inside of the detection cylinder, which will cause the hydraulic oil between the detection cylinder and the U-shaped liquid level tube to produce an opposite liquid level change. That is, on the basis of satisfying the contraction detection of the concrete sample block, it can also detect whether the concrete sample block expands, thereby expanding the detection range of the detection device. A small movement of the piston in the detection cylinder can drive a large liquid level change of the hydraulic oil in the U-shaped liquid level tube. The larger liquid level variable of the U-shaped liquid level tube is used to correspond to the slight contraction of concrete, thereby realizing a more accurate detection of the concrete shrinkage test. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the internal structure of the detection box of the utility model;

[0021] Figure 3 This is a schematic diagram of the overall front view structure of the utility model;

[0022] Figure 4 This is a schematic diagram of the overall side view structure of the utility model;

[0023] Figure 5 This is a schematic diagram of the connection structure between the movable base and the precision linear slide rail of the utility model;

[0024] Figure 6 This is a schematic diagram of the connection structure between the detection tube and the U-shaped liquid level tube of the utility model;

[0025] Figure 7 This is a schematic diagram of the cross-sectional structure of the detection tube of the utility model;

[0026] Figure 8 This is a schematic diagram of the cross-sectional structure of the U-shaped liquid level tube of the utility model;

[0027] Fig. 9 This is a schematic diagram of the connection structure of the circulation fan, air inlet duct and exhaust duct of the utility model.

[0028] In the figure: 1. detection box, 11. sealed box cover, 12. support foot, 2. movable base, 21. baffle, 22. baffle rod, 23. longitudinal support teeth, 24. transverse support teeth, 3. precision linear slide rail, 4. concrete sample block, 5. detection cylinder, 51. detection push rod, 52. piston, 53. spring, 54. front end liquid guide interface, 55. rear end liquid guide interface, 6. U-shaped liquid level tube, 61. fixing ring, 62. front end liquid guide tube, 63. rear end liquid guide tube, 64. hydraulic oil, 65. soft rubber block, 66. scale line, 7. small constant temperature and humidity machine, 8. circulation fan, 81. air inlet duct, 82. exhaust duct, 9. electromagnetic three-way valve. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] Embodiment 1

[0031] like Figure 1 , Figure 2 , Figure 6 , Figure 7 and Figure 8 As shown, a detection device for shrinkage test of underground pipe gallery concrete comprises a detection box 1, wherein a movable base 2 and a detection tube 5 are arranged in the detection box 1, the detection tube 5 is fixedly connected to the box wall of the detection box 1, the movable base 2 is located at one side of the detection tube 5, a concrete sample block 4 is arranged on the movable base 2, a U-shaped liquid level tube 6 is fixedly connected to the outer wall of the short side box on one side of the detection box 1, and the detection tube 5 is connected to the U-shaped liquid level tube 6, the concrete sample block 4 can be positioned and installed by placing it on the movable base 2, and the concrete sample block 4 can be moved to a position close to the detection tube 5 by moving the movable base 2, at which time the initial liquid level data of the U-shaped liquid level tube 6 can be recorded, after a period of time, the concrete sample block 4 can change its shape, and then the detection tube 5 can produce a corresponding action, that is, it can drive the liquid in the U-shaped liquid level tube 6 to form another liquid level data, and the shrinkage deformation of the concrete sample block 4 can be accurately obtained through the difference between the two sets of data, that is, the shrinkage condition of the concrete can be tested;

[0032] A small constant temperature and humidity machine 7 is fixedly connected to the outer wall of the short side box of the other side of the detection box 1, and a circulating fan 8 is fixedly connected to the bottom of the detection box 1. The air inlet and outlet ports of the circulating fan 8 are respectively connected to the long side box walls on both sides of the detection box 1. The humidity and temperature in the detection box 1 can be adjusted by the small constant temperature and humidity machine 7, and the gas in the detection box 1 can be driven to flow by the circulating fan 8 to simulate the concrete sample block 4 in different temperature, humidity and different ventilation conditions for concrete shrinkage detection, that is, it can more realistically simulate the real environment of the underground pipe gallery where the concrete is located;

[0033] A detection push rod 51, a piston 52 and a spring 53 are provided in the detection cylinder 5. One end of the detection push rod 51 is inserted in the detection cylinder 5, and the other end of the detection push rod 51 is against the end surface of the concrete sample block 4. The piston 52 is movably arranged in the detection cylinder 5, and the edge of the piston 52 is tightly attached to the inner wall of the detection cylinder 5. The spring 53 is compressed and pressed between the piston 52 and the bottom of the detection cylinder 5. The front and rear ends of the detection cylinder 5 are respectively connected with the two ends of the U-shaped liquid level tube 6. The detection cylinder 5 and the U-shaped liquid level tube 6 are filled with hydraulic oil 64. The inner diameter of the detection cylinder 5 is larger than the inner diameter of the U-shaped liquid level tube 6, so that when the concrete sample block 4 shrinks, a gap is generated between the concrete sample block 4 and the detection push rod 51, and then the piston 52 is pushed by the action of the spring 53, so that the detection push rod 51 is pushed to the outside of the detection cylinder 5, so that the detection push rod 51 It always rests against the end surface of the concrete sample block 4, that is, it can drive the hydraulic oil 64 between the detection cylinder 5 and the U-shaped liquid level tube 6 to produce a liquid level change, and if the concrete sample block 4 expands, the concrete sample block 4 will push the detection push rod 51 to the inner side of the detection cylinder 5, at this time, it will drive the hydraulic oil 64 between the detection cylinder 5 and the U-shaped liquid level tube 6 to produce a reverse liquid level change, that is, it can not only meet the contraction detection of the concrete sample block 4, but also detect whether the concrete sample block 4 expands, thereby expanding the detection range of the detection device, and the piston in the detection cylinder 5 moves slightly, which can drive the hydraulic oil 64 in the U-shaped liquid level tube 6 to undergo a large liquid level change, and the relatively large liquid level variable of the U-shaped liquid level tube 6 is used to correspond to the slight contraction of the concrete, thereby achieving a more accurate detection of the concrete shrinkage test.

[0034] Embodiment 2

[0035] Improvements based on Example 1:

[0036] like Figures 1 to 5As shown, a sealed box cover 11 is engaged at the upper opening of the test box 1, and supporting feet 12 are vertically connected to the four corners of the bottom end of the test box 1. The sealing box cover 11 can be engaged with the test box 1 to make the interior of the test box 1 in a sealed space, thereby ensuring that the simulated environment in the box is isolated from the outside, so that a more accurate simulated environment test can be performed in the box. At the same time, the supporting feet 12 can provide stable support for the test box 1, and make the bottom of the test box 1 suspended, providing installation space for various components connected to the bottom of the box.

[0037] Furthermore, a baffle 21 is vertically connected to a side of the movable base 2 away from the detection tube 5, and a plurality of baffle rods 22 are vertically connected to a side plate surface of the baffle 21 close to the detection tube 5. A longitudinal supporting tooth 23 and a transverse supporting tooth 24 are provided on the movable base 2, and the transverse supporting tooth 24 is provided on both sides of the longitudinal supporting tooth 23. When the concrete sample block 4 is placed on the movable base 2, the placement position of the concrete sample block 4 can be limited by the baffle 21, and when the movable base 2 approaches the detection tube 5, the baffle rod 22 is pressed against the end face of the concrete sample block 4 to have a better ventilation effect, and the longitudinal supporting teeth 23 and the transverse supporting teeth 24 can also ventilate the bottom surface of the concrete sample block 4 to ensure that the concrete sample block 4 can shrink more naturally, and the longitudinal supporting teeth 23 and the transverse supporting teeth 24 are matched to make the concrete sample block 4 more firmly placed on the movable base 2.

[0038] Furthermore, a precision linear slide 3 is fixedly connected to the bottom of the detection box 1, and the movable base 2 is movably placed on the rail body of the precision linear slide 3, and the movable base 2 is fixedly connected to the slider of the precision linear slide 3. The movable base 2 can be driven to move by the precision linear slide 3, and the concrete sample block 4 can be moved in the direction close to the detection tube 5, that is, the concrete sample block 4 can be moved to a position where it hits the detection push rod 51, and the detection push rod 51 is retracted a certain distance into the detection tube 5. This position is the fixed point position of the concrete sample block 4 after movement, and the inward contraction of the detection push rod 51 can put the spring 53 in a compressed state, and then the detection push rod 51 can be pushed in different directions according to the contraction or expansion of the concrete sample block 4, driving the hydraulic oil 64 in the U-shaped liquid level tube 6 to produce different liquid level changes.

[0039] like Figure 1 , Figure 2 , Figure 6 , Figure 7 and Figure 8As shown, a front end liquid guide interface 54 and a rear end liquid guide interface 55 are provided on the bottom wall of the detection cylinder 5, and the front end liquid guide interface 54 and the rear end liquid guide interface 55 are respectively connected with the inner cavity of the detection cylinder 5 on both sides of the piston 52, so that when the detection push rod 51 is pushed in different directions, the piston 52 can be driven to move in different directions in the detection cylinder 5, and the hydraulic oil 64 on both sides of the piston 52 can be moved in different directions, so as to realize the corresponding liquid level change of the hydraulic oil 64 in the U-shaped liquid level tube 6.

[0040] Furthermore, the end tube body and the middle tube body of the U-shaped liquid level tube 6 are fixedly sleeved with a fixing ring 61, and the fixing ring 61 is fixedly connected to the outer wall of the detection box 1. The two end tube openings of the U-shaped liquid level tube 6 are respectively connected to the front end liquid guide tube 62 and the rear end liquid guide tube 63. The other end of the front end liquid guide tube 62 is connected to the front end liquid guide interface 54, and the other end of the rear end liquid guide tube 63 is connected to the rear end liquid guide interface 55. The U-shaped liquid level tube 6 is connected to the detection cylinder 5 through the front end liquid guide tube 62 and the rear end liquid guide tube 63, thereby realizing the flow of hydraulic oil 64 between the U-shaped liquid level tube 6 and the detection cylinder 5.

[0041] Furthermore, scale lines 66 are provided on the tube bodies on both sides of the U-shaped liquid level tube 6, and the inside of the U-shaped liquid level tube 6 is also filled with soft rubber blocks 65. The installation position of the soft rubber blocks 65 is located above the hydraulic oil 64 filled with the vertical tube bodies on both sides of the U-shaped liquid level tube 6. The soft rubber blocks 65 can form a barrier to the hydraulic oil 64 on both sides, and when the liquid level of the hydraulic oil 64 in the U-shaped liquid level tube 6 changes, the liquid level change value can be accurately read through the scale lines 66, so as to facilitate the reading of the detection results.

[0042] like Figure 1 , Figure 4 and Fig. 9As shown, the outlet pipe of the circulating fan 8 is connected with an air inlet duct 81, and the connection part of the air inlet duct 81 and the outlet pipe of the circulating fan 8 is installed with an electromagnetic three-way valve 9, and the two ends of the air inlet duct 81 are respectively connected with the long side box walls on both sides of the detection box 1, and the air inlet pipe of the circulating fan 8 is connected with an exhaust duct 82, and the connection part of the exhaust duct 82 and the air inlet pipe of the circulating fan 8 is installed with an electromagnetic three-way valve 9, and the two ends of the exhaust duct 82 are respectively connected with the long side box walls on both sides of the detection box 1. By controlling the opening direction of the two electromagnetic three-way valves 9, the air blown out from the outlet pipe of the circulating fan 8 can be discharged through one of the pipes of the air inlet duct 81. The air in the detection box 1 can flow through the opening, and then the air flow can enter from one side wall of the detection box 1, and the air flow in the detection box 1 can be discharged through the exhaust duct 82 connected to the other side wall of the detection box 1, and enter the air inlet end of the circulation fan 8, so that the gas in the detection box 1 can be driven to flow in a certain direction by the circulation fan 8. Similarly, by changing the opening direction of the two electromagnetic three-way valves 9, the gas in the detection box 1 can be driven to flow in the opposite direction, that is, during the detection process, by changing the flow direction of the air flow in the box, the concrete sample block 4 can be blown by a more uniform air flow, making the entire simulation environment more realistic.

[0043] Working principle: The concrete sample block 4 is placed on the movable base 2 to realize the positioning and installation of the concrete sample block 4. The movable base 2 is driven to move by the precision linear slide rail 3, so that the concrete sample block 4 can be moved in the direction close to the detection tube 5, that is, the concrete sample block 4 can be moved to the position where it hits the detection push rod 51, and the detection push rod 51 is retracted a certain distance into the detection tube 5. This position is the fixed point position of the concrete sample block 4 after movement. At this time, the initial liquid level data of the U-shaped liquid level tube 6 can be recorded, and the humidity and temperature in the detection box 1 can be adjusted by the small constant temperature and humidity machine 7, and the gas in the detection box 1 can be driven to flow by the circulating fan 8 to simulate the concrete sample block 4 in different temperature, humidity and ventilation conditions to perform concrete shrinkage detection. After a period of time, the concrete sample block 4 changes shape. When the concrete sample block 4 shrinks, a gap is generated between the concrete sample block 4 and the detection push rod 51. Then, the piston 52 is pushed by the action of the spring 53, so that the detection push rod 51 is pushed toward the outside of the detection cylinder 5, so that the detection push rod 51 always rests on the end surface of the concrete sample block 4, that is, it can drive the hydraulic oil 64 between the detection cylinder 5 and the U-shaped liquid level tube 6 to produce a liquid level change, and if the concrete sample block 4 expands, the concrete sample block 4 will push the detection push rod 51 toward the inside of the detection cylinder 5, at this time, it will drive the hydraulic oil 64 between the detection cylinder 5 and the U-shaped liquid level tube 6 to produce a reverse liquid level change, that is, it can not only meet the contraction detection of the concrete sample block 4, but also detect whether the concrete sample block 4 expands, thereby expanding the detection range of the detection device, and the piston in the detection cylinder 5 moves slightly, which can drive the hydraulic oil 64 in the U-shaped liquid level tube 6 to undergo a large liquid level change, and the relatively large liquid level variable of the U-shaped liquid level tube 6 is used to correspond to the slight contraction of the concrete, thereby achieving a more accurate detection of the concrete shrinkage test.

[0044] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0045] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An underground pipe gallery concrete shrinkage test detection device, comprising a detection box (1), characterized in that: The detection box (1) is provided with a movable base (2) and a detection cylinder (5), the detection cylinder (5) is fixedly connected to the box wall of the detection box (1), the movable base (2) is located on one side of the detection cylinder (5), a concrete sample block (4) is placed on the movable base (2), a U-shaped liquid level tube (6) is fixedly connected to the outer wall of one side of the short side of the detection box (1), and the detection cylinder (5) is connected to the U-shaped liquid level tube (6); A small constant temperature and humidity machine (7) is fixedly connected to the outer wall of the other short side of the detection box (1), and a circulating fan (8) is fixedly connected to the bottom of the detection box (1), and the air inlet and outlet ports of the circulating fan (8) are respectively connected to the long side walls of the detection box (1) on both sides; The detection cylinder (5) is provided with a detection push rod (51), a piston (52) and a spring (53); one end of the detection push rod (51) is inserted into the detection cylinder (5); the other end of the detection push rod (51) is against the end surface of the concrete sample block (4); the piston (52) is movably arranged in the detection cylinder (5); the edge of the piston (52) is in close contact with the inner wall of the detection cylinder (5); the spring (53) is compressed and is pressed between the piston (52) and the bottom of the detection cylinder (5); the front and rear ends of the detection cylinder (5) are respectively connected to the two ends of the U-shaped liquid level tube (6); the detection cylinder (5) and the U-shaped liquid level tube (6) are filled with hydraulic oil (64); the inner diameter of the detection cylinder (5) is larger than the inner diameter of the U-shaped liquid level tube (6).

2. The underground pipe gallery concrete shrinkage test detection device according to claim 1 is characterized in that: A sealed box cover (11) is engaged at the upper opening of the detection box (1), and supporting feet (12) are vertically connected to the four corners of the bottom of the detection box (1).

3. The underground pipe gallery concrete shrinkage test detection device according to claim 1 is characterized in that: A baffle plate (21) is vertically connected to a side of the movable base (2) away from the detection cylinder (5), and a plate surface of the baffle plate (21) close to the detection cylinder (5) is vertically connected to a plurality of baffle rods (22). The movable base (2) is provided with longitudinal support teeth (23) and transverse support teeth (24), and the transverse support teeth (24) are provided at two sides of the longitudinal support teeth (23).

4. The underground pipe gallery concrete shrinkage test detection device according to claim 3 is characterized in that: The bottom of the detection box (1) is fixedly connected to a precision linear slide rail (3), the movable base (2) is movably clamped on the rail body of the precision linear slide rail (3), and the movable base (2) is fixedly connected to a slider of the precision linear slide rail (3).

5. The underground pipe gallery concrete shrinkage test detection device according to claim 1 is characterized in that: A front end liquid guide interface (54) and a rear end liquid guide interface (55) are provided on the bottom wall of the detection cylinder (5), and the front end liquid guide interface (54) and the rear end liquid guide interface (55) are respectively connected to the inner cavities of the detection cylinder (5) on both sides of the piston (52).

6. The underground pipe gallery concrete shrinkage test detection device according to claim 5 is characterized in that: The end tube body and the middle tube body of the U-shaped liquid level tube (6) are both fixedly sleeved with a fixing ring (61), and the fixing ring (61) is fixedly connected to the outer wall of the detection box (1). The two end tube openings of the U-shaped liquid level tube (6) are respectively connected to a front end liquid guide tube (62) and a rear end liquid guide tube (63), the other end of the front end liquid guide tube (62) is connected to the front end liquid guide interface (54), and the other end of the rear end liquid guide tube (63) is connected to the rear end liquid guide interface (55).

7. The underground pipe gallery concrete shrinkage test detection device according to claim 1 is characterized in that: Graduation lines (66) are provided on the tube bodies on both sides of the U-shaped liquid level tube (6), and the inside of the U-shaped liquid level tube (6) is also filled with soft rubber blocks (65). The installation position of the soft rubber blocks (65) is located above the hydraulic oil (64) filled in the vertical tube bodies on both sides of the U-shaped liquid level tube (6).

8. The underground pipe gallery concrete shrinkage test detection device according to claim 1 is characterized in that: The outlet pipe of the circulating fan (8) is connected to an air inlet duct (81); a solenoid three-way valve (9) is installed at the connection portion between the air inlet duct (81) and the outlet pipe of the circulating fan (8); the two ends of the air inlet duct (81) are respectively connected to the long side box walls of the detection box (1) at both sides; the air inlet pipe of the circulating fan (8) is connected to an exhaust pipe (82); a solenoid three-way valve (9) is installed at the connection portion between the exhaust pipe (82) and the air inlet pipe of the circulating fan (8); the two ends of the exhaust pipe (82) are respectively connected to the long side box walls of the detection box (1) at both sides.

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