Device for measuring distance between buried stones in buried stone concrete and control method

Abstract

The application discloses a kind of buried stone concrete buried stone spacing measuring device and control method, wherein, measuring device includes handheld control unit, measuring arm unit and connecting rod transmission unit;The handheld control unit includes handheld rod, control piece movable along handheld rod and locking piece arranged on control piece, length scale mark is arranged on handheld rod, and locking piece is used to lock the relative position of control piece and handheld rod;Measuring arm unit includes a pair of measuring arms, and the end of measuring arm away from control piece is measuring end;Connecting rod transmission unit connects handheld control unit and two measuring arms;When control piece moves along handheld rod, connecting rod transmission unit drives a pair of measuring arms to open or close, and the corresponding position of control piece on length scale mark is used to indicate the opening distance of the measuring end of a pair of measuring arms;The application effectively improves the problems that the existing buried stone spacing detection means has poor precision, weak adaptability, low operation safety and insufficient construction applicability.

Description

Technical Field

[0001] This invention relates to the field of concrete gravity dam construction technology, specifically to a device and control method for measuring the spacing between embedded stones in embedded stone concrete. Background Technology

[0002] In the construction of buried-rock concrete gravity dams, controlling the buried-rock ratio is crucial, and the key to controlling the buried-rock ratio lies in the reasonable spacing between the stones. Currently, the buried-rock ratio is mainly controlled using the volumetric quantitative placement method. This method requires the stones to be arranged in a quincunx pattern during construction, but the control of the stone spacing often relies on construction experience, the creation of visual estimation tools of fixed length, or simple measurement using a measuring tape. This method easily leads to the buried-rock ratio tending towards total quantity control, resulting in uneven density of buried stones in actual layout. This not only reduces construction efficiency but may even affect the compactness of the concrete due to excessively dense local burying of stones, causing quality and safety hazards.

[0003] Among existing patented technologies, invention patent CN110053129A provides a combined construction tool for rapid construction of embedded stone concrete, comprising a hoisting platform, embedded stone storage bins, bottom covers of the embedded stone storage bins, vibrator limiting holes, lifting lugs, and multiple vibrators. The hoisting platform is equipped with multiple rows and columns of sunken embedded stone storage bins. When using this combined construction tool, embedded stones need to be placed in the embedded stone storage bins; the position of each storage bin determines the position of the embedded stones, and the distance between the storage bins determines the distance between the embedded stones. This effectively ensures the position of each embedded stone and the overall embedded stone rate. However, the dimensions of each embedded stone storage bin are fixed, requiring the size of the stones to strictly match the bin specifications. This makes it unsuitable for natural stones of varying sizes found on construction sites, resulting in a narrow range of applications and a severe lack of flexibility in actual construction.

[0004] Patent No. ZL201910926106.7 discloses a spacing measuring device, including a clamping block detachably fixed to one of the objects to be measured. The clamping block has a reference surface that contacts the measured surface of the object. The clamping block has a measuring hole pointing to another object and a positioning groove that cuts off the measuring hole. The measuring rod of a dial indicator is located in the middle of the measuring hole and abuts against a partition in the positioning groove, or passes through the measuring hole and abuts against the other object. The spacing between the two objects is determined by the change in readings in these two states. This spacing measuring device can quickly and accurately measure the spacing between the opposing surfaces of two objects, thus effectively improving the efficiency and accuracy of measurement. However, it is only suitable for objects with relatively flat surfaces and regular shapes, and requires the clamping block to be fixed to the object being measured, necessitating close-range operation during the measurement process. In the environment of embedded stone concrete construction, the surface of the stones is naturally rough and extremely irregular in shape, making it difficult to establish a stable reference surface. Simultaneously, the intensive mechanical operations within the concrete slab posed a significant safety hazard to personnel installing the clamping block close to the surface. In addition, the device needs to be installed and disassembled one by one, which makes it difficult to meet the high-frequency and large-scale spacing detection needs in buried stone construction, thus limiting its practicality.

[0005] Therefore, in the construction of embedded stone concrete, there is an urgent need for a special spacing measuring device and control method that can adapt to irregular stones, support safe operation over long distances, and allow for quick and flexible adjustment of the measurement range. Summary of the Invention

[0006] The purpose of this invention is to provide a device and control method for measuring the spacing between embedded stones in concrete, aiming to improve the problems of poor accuracy, weak adaptability, low operational safety and insufficient applicability in existing methods for detecting the spacing between embedded stones.

[0007] To achieve the above objectives, according to a first aspect of the present invention, the present invention provides a device for measuring the spacing between embedded stones in embedded concrete, comprising: A handheld control unit includes a handheld rod, a control component movably mounted on the handheld rod and movable along the handheld rod, and a locking component mounted on the control component. The handheld rod is provided with a length scale mark, and the locking component is used to lock the relative position of the control component and the handheld rod. The measuring arm unit includes a pair of parallel measuring arms located on both sides of the handheld lever, wherein the end of the measuring arm furthest from the control component is the measuring end; The linkage transmission unit connects the handheld control unit and the two measuring arms; When the control component moves along the handheld rod, the linkage transmission unit drives a pair of measuring arms to open or close. The corresponding position of the control component on the length scale mark is used to indicate the opening distance of the measuring ends of the pair of measuring arms.

[0008] Furthermore, the linkage transmission unit includes: A pair of first links, one end of each first link is hinged to the control element, and the other end is hinged to two measuring arms respectively; A pair of sliding components are slidably mounted on the measuring arm; A pair of second links are connected by an X-shaped intersection and hinged together, and the intersection position is also hinged to a handheld rod; one end of the second link is hinged to a measuring arm, and the other end is hinged to a sliding member on another measuring arm.

[0009] Furthermore, the measuring end of the measuring arm is provided with a measuring tip, which is detachably connected to the measuring arm, and the installation direction of the measuring tip is adjustable so that the inner or outer side of the measuring tip is flush with the inner or outer side of the measuring arm.

[0010] Furthermore, the measuring arm has a guide groove along its length, and the inner wall of the sliding member has a guide protrusion that cooperates with the guide groove.

[0011] Furthermore, both the measuring arm and the handheld rod are cylindrical, while the control component is cylindrical. The control component is fitted onto the handheld rod and has a nut structure thereon. The locking component is a hand-tightening bolt structure. The end of the locking component away from its head has a groove, and an anti-slip pad protruding to the outside of the groove is provided in the groove. The locking component is threadedly connected to the nut structure on the control component. By tightening the locking component, the anti-slip pad at its end presses against the handheld rod, locking the relative position of the control component and the handheld rod. By loosening the locking component, the anti-slip pad is released from the handheld rod, allowing the control component to slide freely along the handheld rod. The nut structure has a through hole penetrating the cylindrical wall of the control component, and this through hole is positioned to avoid length scale markings.

[0012] According to a second aspect of the present invention, the present invention provides a method for controlling the spacing between embedded stones in embedded stone concrete, wherein the above-mentioned embedded stone spacing measuring device in embedded stone concrete is used to control and verify the spacing between embedded stones in embedded stone concrete.

[0013] Furthermore, this includes the following steps: S100. Quickly measure the length, width, and height of irregular stones to determine their specifications and match the corresponding spacing control standards according to the designed stone burial rate. S200. Based on the determined spacing control standard, adjust the control component to the target spacing position corresponding to the length scale mark, and tighten the locking component to complete the range locking. S300: Construction workers stand in a safe area with a handheld rod in hand, and insert the measuring arm into the gap between the stones to be inspected, so that the end face of the measuring arm is against the outer edge of the stone, to quickly verify whether the net distance between the stones meets the design requirements. S400. For stones that do not meet the spacing requirements, the construction machinery is instructed to make a fine-tuning of their position. After the fine-tuning, the measuring device is used to re-measure until the stone spacing is qualified. After the S500 and buried stone layout is completed, a measuring device is used to fully verify the spacing between the stones in the storage area. Only after the verification is qualified can the next process of concrete pouring be carried out.

[0014] Furthermore, the specific method for rapidly measuring the size of the stone block in step S100 is as follows: push the control component to open the measuring end of the measuring arm to a size larger than the estimated size of the stone block, and then slowly close it so that the inner side of the measuring end of the measuring arm is close to the most convex point on both sides of the stone block. Read the length scale mark to obtain the outer contour size of the stone block in this direction, and repeat the measurement to obtain the length, width and height data of the stone block.

[0015] Furthermore, the specific method for instructing the construction machinery to make fine adjustments in step S400 is as follows: after the operator remotely obtains the spacing data through the measuring device, he / she is located in a safe area outside the rotation radius of the machinery and issues a displacement command to the machinery operator by hand gesture or walkie-talkie. During the adjustment process, the operator does not enter the blind spot of the machinery operation.

[0016] Furthermore, in step S500, during the full-coverage review, the measurement data of the size and spacing of each stone are recorded to form a stone size and spacing inspection record table, which serves as an attachment to the acceptance of concealed works.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention effectively improves the problems of poor accuracy, weak adaptability, low operational safety, and insufficient applicability in construction of existing methods for detecting the spacing between buried stones.

[0018] 2. The measuring tip of this invention is detachable and its direction is adjustable. It can measure the spacing between stones and the distance between stones and templates when the outer side is flush with the surface, and it can also measure the length, width and height of stones when the inner side is flush with the surface. It is a multi-purpose machine that does not require frequent tool changes and significantly improves construction flexibility.

[0019] 3. All components of this invention are rigid mechanical rods and cylinders, which achieve transmission through hinge and sliding connections. There are no electronic components or precision optical devices, no power supply, and they are not affected by harsh conditions such as dust, water mist, light changes, vibration and impact in the concrete construction environment. The structure is simple, sturdy and durable, and easy to clean and maintain, making it very suitable for field operation environments such as water conservancy and hydropower projects.

[0020] 4. This invention supports single-person operation without the need for multiple people to cooperate. After locking the range by the locking device, it can perform batch and rapid verification of stones with the same spacing requirements without the need for repeated adjustment and reading.

[0021] 5. This invention allows for the measurement and recording of the size and spacing of each stone during construction, forming a stone size and spacing inspection record table, which serves as supplementary documentation for the acceptance of concealed works. This solves the blind spot of quality management in traditional stone embedding construction, which relies on experience and lacks records, and provides data support for project quality traceability. Attached Figure Description

[0022] Figure 1 A schematic diagram of the structure of the stone-embedded spacing measuring device in embedded concrete provided by the present invention; Figure 2 This is a schematic diagram of the connection between the measuring arm and the sliding member of the present invention; Figure 3 for Figure 2 Sectional view along axis AA; Figure 4 This is a schematic diagram showing the connection between the control component, the handheld lever, and the locking component of the present invention. Figure 5 for Figure 4 BB-direction sectional view; Figure 6 This is a flowchart of the method for controlling the spacing of embedded stones in embedded stone concrete provided by the present invention.

[0023] Reference numerals: 1. Measuring tip; 2. Measuring arm; 3. Sliding component; 4. Hinge shaft; 5. Control component; 6. Length scale marking; 7. Handheld lever; 8. Locking component; 9. Second link; 10. First link. Detailed Implementation

[0024] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0025] The following description, in conjunction with the accompanying drawings and specific embodiments, provides further details: Example 1 This embodiment provides a device for measuring the spacing between embedded stones in concrete, including a handheld control unit, a measuring arm unit, and a linkage transmission unit, such as... Figure 1 , Figure 4 and Figure 5As shown, the handheld control unit includes a handheld rod 7, a control component 5 movably mounted on and movable along the handheld rod 7, and a locking component 8 mounted on the control component 5. The handheld rod 7 is a solid round rod, and the control component 5 is cylindrical with an outer diameter slightly larger than the diameter of the handheld rod 7. The control component 5 is fitted onto the handheld rod 7 and can slide along its axial direction. The control component 5 has a nut structure, which can take various forms. It can be a threaded through-hole directly in the cylindrical wall of the control component 5, or a through-hole with a nut welded to the outer wall at that hole. The locking component 8 is a hand-tightening bolt for easy operation, threaded onto the nut structure on the control component 5. Tightening the locking component 8 causes its end to press against the handheld rod 7, locking the control component 5 in place. Loosening the locking component 8 allows the control component 5 to slide smoothly along the handheld rod 7, since its outer diameter is slightly larger than the diameter of the handheld rod 7.

[0026] In some other exemplary embodiments, the end of the locking member 8 away from its head is provided with a groove, and an anti-slip pad protruding out of the groove is provided in the groove. Tightening the locking member 8 allows the anti-slip pad at its end to press against the handheld lever 7, thereby increasing the friction between the locking control member 5 and the handheld lever 7 or the relative position between the locking control member 5 and the handheld lever 7, while the anti-slip pad will not cause hard compression damage to the handheld lever 7 when it presses against it. Loosening the locking member 8 allows the anti-slip pad to detach from the handheld lever 7, and the control member 5 can slide freely along the handheld lever 7.

[0027] like Figure 1 and Figure 4 As shown, the handheld lever 7 has a length scale mark 6 along its length direction, i.e., the axial direction. The corresponding position of the control element 5 on the length scale mark 6 is used to indicate the opening distance of the measuring ends of the pair of measuring arms 2 of the measuring arm unit. The nut structure has a through hole penetrating the cylindrical wall of the control element 5, and this through hole is set away from the length scale mark 6 to prevent the locking element 8 from scratching or wearing the length scale mark 6, thereby protecting the integrity and readability of the length scale mark 6 for a long time.

[0028] In other exemplary embodiments, to prevent the length scale markings 6 from wearing down, a long, narrow groove is provided on the outer wall of the handheld rod 7. The length scale markings 6 are installed in the long, narrow groove in the form of a ruler, and the surface of the ruler is lower than the surface of the outer wall of the handheld rod 7. This avoids slippage, bumps, and friction that could cause the scale to become blurred or fall off, thus improving the stability and reading reliability of the device during long-term use. In addition, it also facilitates the replacement and transfer of the length scale markings 6.

[0029] like Figure 1As shown, the measuring arm unit includes a pair of parallel measuring arms 2 located on either side of the handheld rod 7. Each measuring arm 2 is a hollow round rod structure. The end of the measuring arm 2 furthest from the control component 5 is the measuring end, and the other end is the driving end. The measuring end of the measuring arm 2 is equipped with a measuring tip 1. The measuring tip 1 can be a component of the measuring arm 2 itself or an independent structure installed at the measuring end of the measuring arm 2. In this case, the measuring tip 1 and the measuring arm 2 can be detachably connected by bolts. Thus, the installation direction of the measuring tip 1 is adjustable. By adjustment, the inner or outer side of the measuring tip 1 can be flush with the inner or outer side of the measuring arm 2, which is used for measuring the spacing and contour dimensions of stones in different situations, meeting diverse on-site measurement needs and improving the versatility and accuracy of the device.

[0030] like Figures 1-3 As shown, the linkage transmission unit connects the handheld control unit and the two measuring arms 2. Specifically, the linkage transmission unit includes a pair of first connecting rods 10, a pair of sliding members 3, and a pair of second connecting rods 9. A hinge seat is welded to each side of the control unit 5, and a hinge shaft 4 is installed in the hinge seat. One end of each first connecting rod 10 is hinged to the control unit 5 via the hinge shaft 4, and the other end of each first connecting rod 10 is hinged to the drive end of the two measuring arms 2 via the hinge shaft 4. The sliding member 3 is cylindrical, and two sliding members 3 are respectively fitted onto the two measuring arms. The inner diameter of the sliding member 3 is slightly larger than the outer diameter of the measuring arm 2, allowing the sliding member 3 to slide along the length of the measuring arm 2. A guide groove is formed along the length of the measuring arm 2, and a guide protrusion that cooperates with the guide groove is provided on the inner wall of the sliding member 3. This ensures that the sliding member 3 does not rotate circumferentially when sliding along the measuring arm 2, maintaining a stable transmission posture, avoiding jamming and swaying, and ensuring that the opening and closing actions of the measuring arm 2 are synchronous, accurate, and smooth. A hinge seat is provided on the inner side of the sliding member 3. A pair of second connecting rods 9 are X-shaped and hinged together, and this intersection position is also hinged to the handheld rod 7. One end of the second connecting rod 9 is hinged to a measuring arm 2, and the other end is hinged to the hinge seat on the sliding member 3 on the other measuring arm 2. Thus, when the control member 5 moves along the handheld rod 7, the linkage transmission unit drives the pair of measuring arms 2 to open or close.

[0031] Working Principle: During use, the operator holds the handheld lever 7 with one hand and pushes or pulls the control component 5 with the other. When the control component 5 slides along the axial direction of the handheld lever 7, it drives the pair of first connecting rods 10 hinged to it to move. The first connecting rods 10 then drive the driving ends of the two measuring arms 2 to move closer or further apart. Simultaneously, because the second connecting rod 9 is X-shaped and hinged to the handheld lever 7 in the middle, and its two ends are respectively hinged to the sliding parts 3 on the measuring arm 2 and the opposite measuring arm 2, the two measuring arms 2 maintain symmetrical movement throughout the opening and closing process. The sliding parts 3 slide along the measuring arm 2, and the cooperation of the guide groove and guide protrusion ensures smooth transmission without jamming.

[0032] When the control component 5 slides, the position corresponding to the length scale mark 6 on the handheld lever 7 has a definite linear relationship with the opening distance of the measuring ends of the pair of measuring arms 2. Therefore, the operator can directly read the scale value corresponding to the control component 5 to obtain the opening distance of the measuring ends.

[0033] Several typical scenarios in actual measurement: 1. When measuring the distance between stones, insert the measuring end of the measuring arm 2 between adjacent stones, push the control piece 5 so that the outer side of the measuring tip 1 is close to the most convex point of the two stones, and read the scale value corresponding to the control piece 5, which is the actual net distance between the two stones.

[0034] 2. When measuring the size of the stone block, push the control component 5 to open the measuring end of the measuring arm 2 to a size larger than the estimated size of the stone block, then slowly close it so that the inner side of the measuring tip 1 is close to the most convex point on both sides of the stone block. Read the scale value to obtain the outer contour size of the stone block in that direction. Repeat the measurement in the length, width, and height directions to determine the size of the stone block.

[0035] 3. During batch rapid inspection, push the control piece 5 to the corresponding scale position according to the target spacing value, tighten the locking piece 8 to lock it, and use the measuring device as a distance comparison tool. Simply insert it into the gap between the stones to quickly determine whether the spacing meets the requirements.

[0036] IV. When working with machinery, the operator stands in a safe area outside the rotation radius of the construction machinery such as excavators and loaders. After obtaining the spacing data remotely with a handheld measuring device, the operator uses hand gestures or a walkie-talkie to direct the machinery operator to make fine adjustments to the position of the stones. During the adjustment process, the operator does not need to get close to the stones or enter the blind spot of the machinery, which effectively ensures personal safety.

[0037] 5. During the full-site verification, after all the stones have been laid out, use a measuring device to conduct a comprehensive inspection of the pouring surface, check the spacing between the stones one by one, and only after confirming that all are qualified can concrete pouring be carried out.

[0038] Example 2 This embodiment provides a method for controlling the spacing of embedded stones in embedded stone concrete, using the embedded stone spacing measuring device provided in Embodiment 1 to control and verify the spacing of embedded stones in embedded stone concrete. Figure 6 As shown, it includes the following steps: S100. Quickly measure the length, width, and height of irregular stones to determine their specifications and match the corresponding spacing control standard according to the designed stone burial rate. The specific method for quickly measuring the stone size in step S100 is as follows: Push the control component 5 to open the measuring end of the measuring arm 2 to a size larger than the estimated size of the stone, then slowly close it so that the inner side of the measuring end of the measuring arm 2 is close to the most convex points on both sides of the stone. Read the value on the length scale mark 6 corresponding to the position of the control component 5 to obtain the outer contour size of the stone in that direction. Repeat the measurement to obtain the length, width, and height data of the stone.

[0039] S200. Based on the determined spacing control standard, adjust the control component 5 to the target spacing position corresponding to the length scale mark 6, and tighten the locking component 8 to complete the range locking.

[0040] S300: The construction worker stands in a safe area with the handheld rod 7 in hand, and inserts the measuring arm 2 into the gap between the stones to be inspected, so that the end face of the measuring arm 2 is against the outer edge of the stone, to quickly verify whether the net distance between the stones meets the design requirements.

[0041] S400. For stones that do not meet the spacing requirements, instruct the construction machinery to make minor adjustments to their positions. After the minor adjustments, remeasure using a measuring device until the stone spacing is acceptable. The specific method for instructing the construction machinery to make minor adjustments in step S400 is as follows: After the operator obtains the spacing data remotely through the measuring device, they are located in a safe area outside the machinery's rotation radius and issue displacement commands to the machinery operator via hand gestures or walkie-talkies. During the adjustment process, the operator does not enter the machinery's blind spot.

[0042] After the S500 riprap installation is completed, a measuring device is used to conduct a full-coverage verification of the spacing between the riprap within the installation area. Only after confirmation of compliance can the next step of concrete pouring proceed. During the full-coverage verification, the dimensions and spacing of each riprap are recorded to form a riprap dimension and spacing inspection record sheet, which serves as supporting documentation for the acceptance of concealed works.

[0043] In summary, the present invention has the following technical effects: 1. High measurement accuracy This invention establishes a definite linear relationship between the sliding displacement of the control component 5 and the opening and closing distance of the measuring arm 2 through a linkage transmission unit, and directly reads the value through the scale mark 6 on the handheld rod 7. This avoids the reading errors caused by human eye tilt, tape slack, and multiple people working together in traditional tape measure measurement, and also avoids the subjectivity of experience judgment, thus realizing the quantitative and precise control of the stone spacing.

[0044] 2. High adaptability This invention allows for stepless adjustment of the opening of the measuring arm 2 by continuously sliding the control component 5 along the handheld rod 7, adapting to diverse spacing requirements of different design stone embedment ratios and different particle size ranges from 20cm to 120cm. Simultaneously, the measuring tip 1 is detachable and directionally adjustable, enabling measurement of stone spacing and the distance between stones and templates both with the outer side flush and with the inner side flush. This multi-functional design eliminates the need for frequent tool changes and significantly improves construction flexibility.

[0045] 3. High operational safety This invention employs a long rod structure design, allowing operators to hold the handheld rod 7 from a safe distance and extend the measuring arm 2 into the gap between the stones to be measured for measurement, without bending over, getting close to the stones, or entering the machine's rotation radius. During collaborative mechanical operations, the operator remains within a safe area, remotely directing the machine to adjust the stone position using hand gestures or a walkie-talkie, fundamentally eliminating safety hazards such as mechanical collisions and injuries from falling rocks inherent in traditional close-range measurement methods.

[0046] 4. Strong applicability to construction All components of this invention are rigid mechanical rods and cylinders, including a handheld rod 7, a measuring arm 2, a first connecting rod 10, a second connecting rod 9, a sliding component 3, etc. Transmission is achieved through hinged and sliding connections. There are no electronic components or precision optical devices, no power supply is required, and it is not affected by harsh conditions such as dust, water mist, light changes, vibration and impact in the concrete construction environment. The structure is simple, sturdy and durable, and easy to clean and maintain, making it very suitable for field operation environments such as water conservancy and hydropower projects.

[0047] 5. High construction efficiency This invention supports single-person operation, eliminating the need for multiple people to cooperate. After locking the measuring range using locking element 8, batch and rapid verification of stones with the same spacing requirements can be performed without repeated adjustments and readings. During collaborative mechanical operation, measurement and adjustment are carried out simultaneously, significantly reducing the time spent on repeated measurements and adjustments in traditional processes and effectively improving the efficiency of stone burying construction.

[0048] 6. Quality traceability This invention allows for the measurement and recording of the size and spacing of each stone during construction, forming a stone size and spacing inspection record table. This table serves as supplementary documentation for the acceptance of concealed works, solving the blind spot of quality management in traditional stone embedding construction that relies on experience and lacks records, and providing data support for project quality traceability.

[0049] In summary, this invention effectively improves upon the problems of poor accuracy, weak adaptability, low operational safety, and insufficient applicability in construction of existing methods for detecting buried stone spacing.

[0050] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A device for measuring the spacing between embedded stones in embedded concrete, characterized in that, include: The handheld control unit includes a handheld rod (7), a control component (5) movably disposed on the handheld rod (7) and movable along the handheld rod (7), and a locking component (8) disposed on the control component (5). The handheld rod (7) is provided with a length scale mark (6), and the locking component (8) is used to lock the relative position of the control component (5) and the handheld rod (7). The measuring arm unit includes a pair of measuring arms (2), wherein the end of the measuring arm (2) away from the control element (5) is the measuring end; A linkage transmission unit connects the handheld control unit and two measuring arms (2). When the control element (5) moves along the handheld rod (7), the linkage transmission unit drives a pair of measuring arms (2) to open or close. The corresponding position of the control element (5) on the length scale mark (6) is used to indicate the opening distance of the measuring ends of the pair of measuring arms (2).

2. The device for measuring the spacing between embedded stones in embedded concrete according to claim 1, characterized in that, The linkage transmission unit includes: A pair of first links (10), one end of each first link (10) is hinged to the control element (5), and the other end is hinged to the two measuring arms (2) respectively; A pair of sliding parts (3) are slidably fitted onto the measuring arm (2); A pair of second links (9) are connected by an X-shaped intersection and hinged together, and the intersection position is also connected to the handheld rod (7) by hinge. One end of the second link (9) is hinged to a measuring arm (2), and the other end is hinged to a sliding member (3) provided on another measuring arm (2).

3. The device for measuring the spacing between embedded stones in concrete according to claim 1, characterized in that, The measuring arm (2) has a measuring tip (1) at its measuring end. The measuring tip (1) is detachably connected to the measuring arm (2), and the installation direction of the measuring tip (1) is adjustable so that the inner or outer side of the measuring tip (1) is flush with the inner or outer side of the measuring arm (2).

4. The device for measuring the spacing between embedded stones in embedded concrete according to claim 2, characterized in that, The measuring arm (2) has a guide groove along its length, and the inner wall of the sliding member (3) has a guide protrusion that cooperates with the guide groove.

5. The device for measuring the spacing between embedded stones in embedded concrete according to claim 1, characterized in that, The measuring arm (2) and the handheld rod (7) are both cylindrical, and the control member (5) is cylindrical. The control member (5) is sleeved on the handheld rod (7) and has a nut structure thereon. The locking member (8) is a hand-tightening bolt structure. The end of the rod of the locking member (8) away from its head is provided with a groove, and an anti-slip pad protruding to the outside of the groove is provided in the groove. The locking member (8) is threadedly connected to the nut structure on the control member (5). By tightening the locking member (8), the anti-slip pad at its end is pressed against the handheld rod (7), locking the relative position of the control member (5) and the handheld rod (7). By loosening the locking member (8), the anti-slip pad is removed from the handheld rod (7), and the control member (5) can slide freely along the handheld rod (7). The nut structure has a through hole that penetrates the cylindrical wall of the control member (5), and the through hole is set away from the length scale mark (6).

6. A method for controlling the spacing between embedded stones in embedded stone concrete, characterized in that, The spacing between embedded stones in embedded concrete is controlled and verified using the embedded stone spacing measuring device according to any one of claims 1-5.

7. The method for controlling the spacing of embedded stones in embedded stone concrete according to claim 6, characterized in that, Includes the following steps: S100. Quickly measure the length, width, and height of irregular stones to determine their specifications and match the corresponding spacing control standards according to the designed stone burial rate. S200. Based on the determined spacing control standard, adjust the control component (5) to the target spacing position corresponding to the length scale mark (6), and tighten the locking component (8) to complete the range locking. S300. Construction workers stand in a safe area with a handheld rod (7), and insert the measuring arm (2) into the gap between the stones to be inspected. The end face of the measuring arm (2) is against the outer edge of the stone to quickly verify whether the net distance between the stones meets the design requirements. S400. For stones that do not meet the spacing requirements, the construction machinery is instructed to make a fine-tuning of their position. After the fine-tuning, the measuring device is used to re-measure until the stone spacing is qualified. After the S500 and buried stone layout is completed, a measuring device is used to fully verify the spacing between the stones in the storage area. Only after the verification is qualified can the next process of concrete pouring be carried out.

8. The method for controlling the spacing of embedded stones in embedded stone concrete according to claim 7, characterized in that, The specific method for rapidly measuring the size of the stone block in step S100 is as follows: push the control component (5) to open the measuring end of the measuring arm (2) to a size larger than the estimated size of the stone block, and then slowly close it so that the inner side of the measuring end of the measuring arm (2) is close to the most convex point on both sides of the stone block. Read the length scale mark (6) to obtain the outer contour size of the stone block in this direction. Repeat the measurement to obtain the length, width and height data of the stone block.

9. The method for controlling the spacing of embedded stones in embedded stone concrete according to claim 7, characterized in that, The specific method for instructing the construction machinery to make fine adjustments in step S400 is as follows: After the operator obtains the spacing data remotely through the measuring device, he / she is located in a safe area outside the rotation radius of the machinery and issues a displacement command to the machinery operator by hand gesture or walkie-talkie. During the adjustment process, the operator does not enter the blind spot of the machinery operation.

10. The method for controlling the spacing of embedded stones in embedded stone concrete according to claim 7, characterized in that, In step S500, during the full-coverage verification, the measurement data of the size and spacing of each stone are recorded to form a stone size and spacing inspection record table, which serves as an attachment to the acceptance of concealed works.

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