Concrete quality sampling inspection device

Abstract

The invention belongs to the technical field of commercial concrete sampling inspection, and particularly discloses a concrete quality sampling inspection device which comprises a cart, a vertical rod arranged at the front end of the cart, n-shaped frames extending forwards arranged on the vertical rod, a material collecting box elastically connected between the n-shaped frames and a triangular supporting bottom tightly attached to the interior of the material collecting box in a sliding mode. The device further comprises a linkage sampling mechanism, a pressure relief discharging mechanism and a load-bearing adjusting assembly, the linkage sampling mechanism comprises a folding rod rotationally connected with the material collecting box, a connecting rod connecting the folding rod and the triangular supporting bottom and a material guiding groove connected with the folding rod, and the pressure relief discharging mechanism comprises a blocking strip and a triggering rod which are arranged at the bottom of the triangular supporting bottom. The bearing adjusting assembly comprises a positioning rod which is arranged on the vertical rod and is adjustable in position. Mechanical linkage is triggered by means of dead weight accumulation of discharged concrete, the guide chute is driven to instantly cut out the concrete and automatically reset, external power is not needed in the whole process, the structure is reliable, and unmanned intervention, interval quantification and circulating sampling of commercial concrete are achieved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of commodity concrete sampling, and particularly relates to a concrete quality sampling device. BACKGROUND

[0002] As a structural material with the largest amount in modern construction engineering, the quality of commodity concrete is directly related to the structural safety, durability and overall service life of the building. Commodity concrete is produced from a central mixing station and transported to a construction site by a concrete mixing and transporting vehicle. During this process, the workability (such as slump) and homogeneity of the concrete may change due to factors such as transportation time, bumpy road, and changes in environmental temperature and humidity. Therefore, sampling and testing the key performance indicators of the concrete at the construction site before pouring is a key link to ensure that the engineering quality meets the design requirements and standard specifications.

[0003] In order to regulate the construction quality of concrete, the sampling and testing system of concrete is clearly specified in national or industry standards. It is usually required to sample in units of "test batch", for example, after a certain amount of concrete is unloaded for use, the concrete needs to be sampled and tested as a test batch, and the test sample is used to make test blocks for evaluating its mechanical properties. The purpose of this mandatory provision is to establish a quality monitoring system covering the entire construction process.

[0004] However, in current engineering practice, the implementation of the above sampling specification mainly relies on traditional manual operation. Specifically, the on-site quality inspector or construction personnel usually holds a simple tool such as a shovel, a sampling shovel or a sampling bucket, and scoops or shovels a certain amount of concrete as a test sample from the concrete flowing out during the unloading of the concrete mixing and transporting vehicle. This long-standing sampling method has the following inherent defects that are difficult to overcome:

[0005] Ideal sampling should sample from the unloaded concrete after a certain amount of concrete is unloaded. Manual single-point sampling and random sampling cannot achieve accurate quantitative control, and thus cannot truly reflect the test batch required by the specification, resulting in the subsequent slump test or test block strength evaluation results not having sampling representativeness, which poses a serious risk to engineering quality.

[0006] Manual sampling not only has high labor intensity and low efficiency, but also has significant safety risks when operating near large machinery. Moreover, the timing, location and frequency of sampling are all subject to the subjective judgment of the operator, and there is a lack of unified quantitative standards, which makes the quality monitoring process have a huge management loophole.

[0007] Due to the lack of automated recording and constraint means, the manual sampling process is difficult to be effectively traced and supervised, and the violation behaviors such as "symbolic sampling" or "missed detection" are difficult to be eliminated, so that the national mandatory norms are greatly discounted in the actual implementation, and cannot truly play the role of quality "firewall". SUMMARY

[0008] In view of the above, the present application provides a concrete quality sampling device, which utilizes the self-weight accumulation of unloaded concrete to trigger mechanical linkage, drives the guide chute to instantaneously intercept concrete and automatically resets, the whole process does not require external power, the structure is reliable, realizes the unmanned intervention, interval quantitative and cyclic sampling of commercial concrete, ensures the representativeness and fairness of the sample, and significantly improves the safety and efficiency of the on-site operation.

[0009] The technical scheme adopted by the present application is as follows: the present application provides a concrete quality sampling device, which comprises a cart, a vertical rod is arranged at the front end of the cart, and a front-stretching H-shaped frame is arranged on the vertical rod.

[0010] Further, the device comprises a material collecting box elastically connected between the H-shaped frames, a triangular supporting bottom closely and slidingly arranged in the material collecting box, a linkage sampling mechanism, a pressure releasing and discharging mechanism, and a load adjusting assembly.

[0011] Further, the linkage sampling mechanism comprises a folding rod rotationally connected with the material collecting box, a connecting rod connecting the folding rod and the triangular supporting bottom, and a guide chute connected with the folding rod.

[0012] Further, the pressure releasing and discharging mechanism comprises a blocking strip arranged at the bottom of the triangular supporting bottom and a trigger rod, the blocking strip is used for disengageably clamping with a clamping frame arranged at the bottom of the material collecting box.

[0013] Further, the load adjusting assembly comprises a positioning rod arranged on the vertical rod and adjustable in position, the positioning rod is used for abutting against the trigger rod when the material collecting box sinks under load to trigger the pressure releasing and discharging mechanism.

[0014] Further, a first positioning shaft and a limiting piece are arranged on the side wall of the material collecting box, the middle part of the folding rod is rotationally connected with the first positioning shaft, one end of the folding rod is rotationally connected with the upper end of the connecting rod and is blocked and limited by the limiting piece, the bottom of the triangular supporting bottom is provided with a second positioning shaft, and the lower end of the connecting rod is rotationally connected with the second positioning shaft.

[0015] Further, a clamping rail is fixedly arranged at the bottom of the triangular supporting bottom, the blocking strip is horizontally and slidingly arranged in the clamping rail, the inner end of the blocking strip is provided with a fifth spring seat, a second tension spring is connected between the fifth spring seat and the clamping rail, and the trigger rod is fixedly connected with the fifth spring seat and extends towards the positioning rod.

[0016] Further, the load adjusting assembly further comprises a lifting sleeve arranged on the vertical rod and a positioning knob threaded through the lifting sleeve and abutting against the vertical rod, and the lifting sleeve is fixedly connected with the positioning rod.

[0017] Further, the U-shaped frame is provided with a first spring seat, the first spring seat is provided with a first clamping groove, the side wall of the aggregate box is fixedly provided with a clamping strip, the clamping strip is vertically slidably arranged in the first clamping groove, the lower end of the clamping strip is provided with a second spring seat, and the first spring seat and the second spring seat below are connected with a first tension spring.

[0018] Further, the vertical surface of the triangular supporting bottom is provided with a second clamping groove, the inner wall of the aggregate box is provided with a clamping block slidably arranged in the second clamping groove, the outer wall of the aggregate box is provided with a third spring seat, the bottom of the triangular supporting bottom is provided with a fourth spring seat, and the third spring seat and the fourth spring seat are connected with a pre-tension spring.

[0019] Further, the end edge of the blocking strip towards the clamping frame is provided with a chamfer; when the triangular supporting bottom is raised and reset, the chamfer of the blocking strip abuts against the lower edge of the clamping frame, so as to be guided to shrink and finally clamped into the clamping frame.

[0020] Further, the upper and lower edges of one side of the positioning rod towards the trigger rod are provided with chamfers; when the trigger rod is lowered, the upper chamfer of the positioning rod is contacted, and when the trigger rod is raised from the lowermost position, the lower chamfer of the positioning rod is contacted.

[0021] Further, the cross section of the triangular supporting bottom is isosceles triangle, and the bottom thereof is a horizontal surface; when the fourth spring seat is in close contact with the lower end of the aggregate box, the bottom surface of the triangular supporting bottom is flush with the lower end of the aggregate box.

[0022] Further, when the aggregate box is in the initial position without load, the material guiding groove is in a vertical state and away from the upper end of the aggregate box; when the triangular supporting bottom is lowered relative to the aggregate box to drive the folding rod to rotate around the first positioning shaft, the material guiding groove can be swung to the upper side of the aggregate box and in an inclined state with the pushcart.

[0023] The beneficial effects achieved by the above structure are as follows:

[0024] (1) The present application realizes full-automatic cyclic sampling without human intervention, and its working principle is that the weight of the unloaded concrete accumulated in the aggregate box is ingeniously used as a driving source; when the weight accumulation makes the aggregate box sink to the preset position, the trigger rod on the aggregate box will mechanically contact with the fixed positioning rod, thereby automatically triggering the pressure relief unloading mechanism and the linkage sampling mechanism; the whole process does not need manual judgment or operation, and completely abandons the traditional manual sampling mode, which not only liberates the quality inspection personnel from heavy and dangerous physical labor, eliminates the operation safety hazards, but also fundamentally solves the problems of subjective and arbitrary sampling and missed inspection caused by human factors.

[0025] (2) The present application has precise quantitative adjustment capability; the height of the positioning rod in the load-bearing adjustment assembly on the vertical rod is adjusted by rotating the positioning knob, so that the required concrete weight threshold for triggering sampling can be conveniently set; this design enables the sampling operation to be strictly based on the "test batch" standard required by different projects and different specifications, so as to ensure that sampling is performed once after a certain amount of concrete is unloaded, thereby ensuring the representativeness of the sample and the effectiveness of the subsequent quality evaluation, and solving the core defects of uncontrollable sampling amount and lack of representativeness in the background art.

[0026] (3) The present application realizes the forcedness and high reliability of the sampling process; once the device is deployed in the unloading process, the sampling action is physically bound to the concrete unloading process, and the sampling action will inevitably occur as long as concrete is unloaded into the aggregate box and reaches the set weight, which cannot be skipped or intervened by human beings; this is due to the pure mechanical structure design of the device, and the whole linkage process only relies on levers, springs and gravity driving, without any power supply or electronic components; this design not only has reliable principle and is not prone to failure, but also can perfectly adapt to the harsh environment of construction site such as dust, humidity and vibration, thereby ensuring that the quality control specification is strictly implemented. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a first three-dimensional structure schematic diagram of a concrete quality sampling device proposed by the present application.

[0028] Figure 2 It is a second three-dimensional structure schematic diagram of a concrete quality sampling device proposed by the present application.

[0029] Figure 3 It is an explosion structure schematic diagram of a concrete quality sampling device proposed by the present application.

[0030] Figure 4 It is a structure schematic diagram of an aggregate box of a concrete quality sampling device proposed by the present application.

[0031] Figure 5 It is a structure schematic diagram of a triangular supporting bottom of a concrete quality sampling device proposed by the present application.

[0032] Figure 6 for Figure 5 Enlarged view of part A.

[0033] Figure 7 This is a structural schematic diagram of a load-bearing adjustment component of a concrete quality sampling inspection device proposed by the present invention.

[0034] Figure 8 This is a structural schematic diagram of the positional relationship between a trigger rod and a positioning rod of a concrete quality sampling inspection device proposed by the present invention.

[0035] Figure 9 This is an initial state diagram of a concrete quality sampling inspection device proposed by the present invention.

[0036] Figure 10 This is a motion trajectory diagram of a concrete quality sampling inspection device proposed by the present invention.

[0037] Among them, 1. trolley, 11. vertical pole, 12. 匚-shaped frame, 2. first spring seat, 21. first card slot, 22. first tension spring, 3. collection box, 31. card strip, 32. second spring seat, 33. third spring seat, 34. card block, 35. first positioning shaft, 36. limit member, 37. card frame, 4. triangular support bottom, 41. second card slot, 42. fourth spring seat, 43. pre-tension spring, 44. second positioning shaft, 5. linkage sampling mechanism, 51. folding rod, 52. connecting rod, 53. material guide trough, 6. pressure relief unloading mechanism, 61. card rail, 62. stop bar, 63. fifth spring seat, 64. second tension spring, 65. trigger rod, 7. load-bearing adjustment component, 71. lifting sleeve, 72. positioning rod, 73. positioning knob.

[0038] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0040] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0041] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 As shown in the drawings, the present application provides a concrete quality sampling device, which comprises a trolley 1 as a mobile platform, the middle part of the trolley 1 is provided with a counterweight to balance the gravity center of the whole machine, so as to ensure stability when the front end core component carries concrete, the front end of the trolley 1 is symmetrically provided with two vertical stand poles 11, the upper end of the stand pole 11 is fixedly connected with a front-stretching U-shaped frame 12, the U-shaped frame 12 provides a mounting base for the subsequent core sampling mechanism, and in order to facilitate placing a receiving hopper and other equipment, no structure is arranged near the ground area below the U-shaped frame 12.

[0042] The core assembly of the present application comprises a material collecting box 3 elastically suspended between the U-shaped frames 12, a triangular supporting bottom 4 which can be tightly and slidingly fitted in the material collecting box 3, a linkage sampling mechanism 5 linked with the material collecting box 3 and the triangular supporting bottom 4, a pressure releasing and discharging mechanism 6 for releasing the triangular supporting bottom 4, and a load bearing adjusting assembly 7 for setting the triggering weight.

[0043] Specifically, in order to realize the elastic suspension and vertical lifting of the material collecting box 3, a first spring seat 2 is arranged on the end of the U-shaped frame 12, a vertical first clamping groove 21 is formed in the first spring seat 2, a clamping strip 31 is fixedly arranged on the side wall of the material collecting box 3, the clamping strip 31 is vertically and slidingly fitted in the first clamping groove 21, so as to constrain the material collecting box 3 to move vertically between the U-shaped frames 12, the lower end of the clamping strip 31 is provided with a second spring seat 32, the second spring seat 32 is located below the first spring seat 2, and a first tension spring 22 is connected between the first spring seat 2 and the second spring seat 32, in the initial state, the elastic force of the first tension spring 22 lifts the material collecting box 3 upward as a whole.

[0044] The aggregate tank 3 is an open box structure with open upper and lower ends, the cross section of the triangular supporting bottom 4 is isosceles triangular, which is convenient for unloading concrete without residue, and the bottom is a horizontal plane, which is a movable bottom of the aggregate tank 3, in order to ensure that the triangular supporting bottom 4 stably and vertically lifts in the aggregate tank 3, a second clamping groove 41 is arranged on the vertical surface of the triangular supporting bottom 4, and a clamping block 34 which is in sliding cooperation with the second clamping groove 41 is arranged on the inner wall of the aggregate tank 3, in order to realize automatic reset of the triangular supporting bottom 4, a third spring seat 33 is arranged on the outer wall of the aggregate tank 3, and a fourth spring seat 42 is correspondingly arranged on the bottom of the triangular supporting bottom 4, and a pre-tension spring 43 is connected between the third spring seat 33 and the fourth spring seat 42, the pre-tension spring 43 has a certain pre-tension force at the initial length, which can pull the triangular supporting bottom 4 upward, so that the bottom surface is flush with the lower end opening of the aggregate tank 3, and is clamped and limited by the structure of the fourth spring seat 42.

[0045] The linkage sampling mechanism 5 includes a folding rod 51, a connecting rod 52 and a material guide groove 53, a first positioning shaft 35 and a limiting piece 36 are arranged on each of the two opposite side walls of the aggregate tank 3, the middle part of the folding rod 51 is rotationally connected to the first positioning shaft 35, one end of the folding rod 51 is rotationally connected to the upper end of the connecting rod 52, and the end is blocked by the limiting piece 36 below when rotating, thereby limiting the rotation range and preventing the triangular supporting bottom 4 from being separated from the aggregate tank 3, a second positioning shaft 44 is arranged on the bottom of the triangular supporting bottom 4, and the lower end of the connecting rod 52 is rotationally connected to the second positioning shaft 44, and the other end of the folding rod 51 is fixedly connected with the material guide groove 53.

[0046] The pressure release and unloading mechanism 6 is arranged on the bottom of the triangular supporting bottom 4, the bottom of the triangular supporting bottom 4 is fixedly provided with a clamping rail 61, a blocking strip 62 is horizontally slidably arranged in the clamping rail 61, the inner end of the blocking strip 62 is fixedly provided with a fifth spring seat 63, a second tension spring 64 is connected between the fifth spring seat 63 and the clamping rail 61, the spring makes the blocking strip 62 tend to extend outward in the normal state, the fifth spring seat 63 is further fixedly connected with a trigger rod 65 extending outward, the lower end of the aggregate tank 3 is provided with a clamping frame 37 cooperating with the blocking strip 62, in the initial state, the blocking strip 62 extends out and is clamped into the clamping frame 37 under the action of the second tension spring 64, thereby locking the triangular supporting bottom 4 at the bottom of the aggregate tank 3, in order to facilitate reset, the upper edge of the end of the blocking strip 62 facing the clamping frame 37 is chamfered.

[0047] The load adjusting assembly 7 is used for setting the threshold of the unloading weight of the concrete for triggering sampling, the assembly includes a lifting sleeve 71 sleeved on the vertical rod 11, and a positioning knob 73 threaded through the lifting sleeve 71 and capable of abutting against the vertical rod 11, by loosening or tightening the positioning knob 73, the height of the lifting sleeve 71 on the vertical rod 11 can be adjusted and locked, the lifting sleeve 71 is fixedly connected with a positioning rod 72, in order to ensure the smoothness of the triggering and resetting process, the upper and lower edges of the side of the positioning rod 72 facing the trigger rod 65 are chamfered.

[0048] The specific working process is as follows:

[0049] Step 1, initial state and preparation: move the cart 1 to the bottom of the discharge port of the concrete mixer truck, place the receiving hopper for construction under the two inclined surfaces of the triangular support bottom 4, and place the collecting component for sampling under the inclined diversion direction of the guide trough 53. In the initial state, there is no concrete in the aggregate box 3, and its weight is the lightest. The first tension spring 22 is in a contracted state, lifting the aggregate box 3 as a whole to the highest position. At the same time, the pre-tensioned spring 43 also lifts the triangular support bottom 4 to the highest position relative to the aggregate box 3, so that its bottom surface is flush with the lower mouth of the aggregate box 3. At this time, the baffle 62 of the pressure relief unloading mechanism 6 is inserted into the card frame 37 at the bottom of the aggregate box 3 under the action of the second tension spring 64, and the triangular support bottom 4 is firmly locked. The guide trough 53 of the linkage sampling mechanism 5 is naturally in a vertical state due to its connection position, away from the discharge port, and does not affect the normal concrete unloading.

[0050] Step 2, load-bearing sinking and triggering: start unloading, concrete enters the aggregate box 3 from the unloading port, as the amount of concrete increases, the total weight of the aggregate box 3 and the triangular support base 4 gradually increases, and the gravity overcomes the tension of the first tension spring 22, causing the entire aggregate box 3 together with the internal components to sink vertically along the vertical pole 11 direction. In this process, since the triangular support base 4 and the aggregate box 3 are locked by the baffle 62, their relative positions remain unchanged, so the various components of the linkage sampling mechanism 5 (folding rod 51, connecting rod 52, guide trough 53) do not rotate relative to each other. When the aggregate box 3 sinks to a preset depth, the front end of the trigger rod 65 contacts the upper chamfered surface of the positioning rod 72 in the load-bearing adjustment assembly 7. As it continues to sink, the inclined surface of the positioning rod 72 will generate an inward squeezing force on the trigger rod 65, which drives the fifth spring seat 63 to overcome the tension of the second tension spring 64 and move inward, thereby causing the baffle 62 to disengage from the card frame 37.

[0051] Step three, instant unloading and sampling: the moment when the blocking bar 62 is disengaged from the clamping frame 37, the locking between the triangular base 4 and the aggregate box 3 is released, at this moment, the huge gravity of the concrete carried on the triangular base 4 makes it accelerate downward instantly, and the trigger rod 65 also drops below the positioning rod 72, this process produces two linkage effects: one is that after the triangular base 4 falls, most of the concrete on the two isosceles triangular slopes slides down along the slopes and enters the two pre-set construction receiving hoppers below respectively; the other is that the rapid downward movement of the triangular base 4 drives the connecting rod 52 to move downward through the second positioning shaft 44, the downward movement of the connecting rod 52 pulls the folding rod 51 to rotate around the first positioning shaft 35, the rotation of the folding rod 51 drives the guide chute 53 at the other end of the folding rod 51 to swing rapidly below the unloading port and in an inclined state, at this moment, the concrete flowing out of the unloading port of the mixer truck is intercepted by the guide chute 53 and guided along the inclined chute bottom to the sampling collection component on the side, the rotation of the folding rod 51 is eventually stopped by the limiting piece 36, thereby limiting the downward stroke of the triangular base 4.

[0052] Step four, automatic reset: since the concrete on the triangular base 4 is quickly emptied, and the guide chute 53 intercepts new concrete from entering the aggregate box 3, the total weight of the entire movable part is sharply reduced, at this moment, the elastic force of the first tension spring 22 is greater than the remaining gravity, which lifts the aggregate box 3 upward as a whole, and the pre-tension spring 43 also starts to act, pulling the triangular base 4 upward relative to the aggregate box 3, during the upward reset process, the trigger rod 65 will encounter the lower chamfered surface of the positioning rod 72, which guides the trigger rod 65 to shrink inward again, thereby smoothly passing through the positioning rod 72 and returning to above it, when the triangular base 4 is about to reset to the initial position, the upper chamfer of the blocking bar 62 will contact the lower edge of the clamping frame 37 and be guided to shrink inward, after passing through the clamping frame 37, it is automatically popped out under the action of the second tension spring 64 and re-clamped into the clamping frame 37, completing the locking, at the same time, with the upward movement of the triangular base 4, the connecting rod 52 pushes the folding rod 51, making it rotate in the opposite direction, driving the guide chute 53 away from the unloading port and restoring to the initial vertical state.

[0053] At this point, a complete "unload a specific amount of concrete-trigger-sampling-reset" cycle is completed, the device automatically returns to the initial state and starts the next round of concrete entering, thereby realizing periodic automatic sampling.

[0054] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other presenters can develop. It is also possible, however, that only a single element can be present. Terms such as "a", "an", and "the" are not intended to refer to only a singular entity but include the general class of which a single element is only one species, unless otherwise indicated. Furthermore, the use of the terms "primary" and "secondary", "first" and "second", etc., designate different Stages in the process, and are not intended to otherwise limit the number of stages which can be employed. The terminology includes the words specifically noted above, derivatives thereof, and words of similar import. The designation of a component as "optional" indicates that the component is "optional" and can or can not be present or used in the practice of the application, but that when it is present or used, it can be used in varying embodiments of the present application.

[0055] While the embodiments of the application have been shown and described, it is to be understood that for the purpose of the present application, the changes in form and details disclosed can be made by persons skilled in the art, without departing from the spirit and the scope of the present application.

[0056] The above description of the application and its embodiments is not restrictive, and the embodiments shown in the drawings are only one of the embodiments of the present application, and the actual structure is not limited thereto. In general, if a person skilled in the art is inspired by it, without departing from the purpose of the present application, without creative design, similar structure and embodiments of the technical solution can be developed, which should belong to the protection scope of the present application.

Claims

1. A concrete quality sampling device, comprising a trolley (1), wherein a vertical pole (11) is provided at the front end of the trolley (1), and a forward-extending shaped frame (12) is provided on the vertical pole (11), characterized in that: It includes an aggregate bin (3) elastically connected between U-shaped frames (12) and a triangular bottom support (4) closely sliding inside the aggregate bin (3), and also includes a linkage sampling mechanism (5), a pressure relief unloading mechanism (6), and a load-bearing adjustment component (7); The linkage sampling mechanism (5) includes a folding rod (51) rotatably connected to the aggregate bin (3), a connecting rod (52) connecting the folding rod (51) and the triangular bottom support (4), and a guide chute (53) connected to the folding rod (51); The pressure relief unloading mechanism (6) includes a stop bar (62) and a trigger rod (65) provided at the bottom of the triangular bottom support (4), and the stop bar (62) is used for detachably engaging with a card frame (37) provided at the bottom of the aggregate bin (3); The load-bearing adjustment component (7) includes a positioning rod (72) provided on the vertical rod (11) with adjustable position, and the positioning rod (72) is used for abutting against the trigger rod (65) when the aggregate bin (3) sinks due to load-bearing to trigger the pressure relief unloading mechanism (6).

2. A concrete quality sampling device according to claim 1, characterized in that: A first positioning shaft (35) and a limiting member (36) are provided on the side wall of the aggregate bin (3). The middle part of the folding rod (51) is rotatably connected to the first positioning shaft (35). One end of the folding rod (51) is rotatably connected to the upper end of the connecting rod (52) and is blocked and limited by the limiting member (36). A second positioning shaft (44) is provided at the bottom of the triangular bottom support (4), and the lower end of the connecting rod (52) is rotatably connected to the second positioning shaft (44).

3. A concrete quality sampling inspection device according to claim 2, characterized in that: A card rail (61) is fixedly provided at the bottom of the triangular bottom support (4). The stop bar (62) slides horizontally inside the card rail (61). A fifth spring seat (63) is provided at the inner end of the stop bar (62). A second tension spring (64) is connected between the fifth spring seat (63) and the card rail (61). The trigger rod (65) is fixedly connected to the fifth spring seat (63) and extends towards the positioning rod (72).

4. A concrete quality sampling inspection device according to claim 3, characterized in that: The load-bearing adjustment component (7) further includes a lifting sleeve (71) sleeved on the vertical rod (11) and a positioning knob (73) threadedly penetrating the lifting sleeve (71) and abutting against the vertical rod (11), and the lifting sleeve (71) is fixedly connected to the positioning rod (72).

5. A concrete quality sampling inspection device according to claim 4, characterized in that: A first spring seat (2) is provided on the U-shaped frame (12). A first card slot (21) is provided on the first spring seat (2). A card strip (31) is fixedly provided on the side wall of the aggregate bin (3). The card strip (31) slidably cooperates vertically inside the first card slot (21). A second spring seat (32) is provided at the lower end of the card strip (31). A first tension spring (22) is connected between the first spring seat (2) and the second spring seat (32) below.

6. The concrete quality sampling inspection device according to claim 5, characterized in that: A second card slot (41) is provided on the vertical surface of the triangular bottom support (4). A card block (34) slidably cooperating with the second card slot (41) is provided on the inner wall of the aggregate bin (3). A third spring seat (33) is provided on the outer wall of the aggregate bin (3). A fourth spring seat (42) is provided at the bottom of the triangular bottom support (4). A pre-tension spring (43) is connected between the third spring seat (33) and the fourth spring seat (42).

7. The concrete quality sampling inspection device according to claim 6, characterized in that: The upper edge of one end of the baffle (62) facing the card frame (37) is provided with a chamfer; when the triangular support base (4) rises and resets, the chamfer of the baffle (62) abuts against the lower edge of the card frame (37), thereby being guided to shrink and finally be clamped into the card frame (37).

8. The concrete quality sampling inspection device according to claim 7, characterized in that: The positioning rod (72) has a side facing the trigger rod (65) with chamfers on its upper and lower edges; the trigger rod (65) can contact the upper chamfer of the positioning rod (72) when descending, and the trigger rod (65) contacts the lower chamfer of the positioning rod (72) when returning to its original position after ascending from the bottom.

9. The concrete quality sampling inspection device according to claim 8, characterized in that: The cross section of the triangular support base (4) is an isosceles triangle, and its bottom is a horizontal plane; when the fourth spring seat (42) is in close contact with the lower end of the aggregate box (3), the bottom surface of the triangular support base (4) is flush with the lower end of the aggregate box (3).

10. The concrete quality sampling inspection device according to claim 9, characterized in that: When the aggregate box (3) is in an initial position without bearing any weight, the guide trough (53) is in a vertical state and away from the upper end of the aggregate box (3); when the triangular support base (4) sinks relative to the aggregate box (3) and drives the folding rod (51) to rotate around the first positioning axis (35), the guide trough (53) can swing to the top of the aggregate box (3) and be in an inclined state with its back facing the trolley (1).

Images