Device for detecting masonry mortar strength through pendulum bob knock-in method

Abstract

The invention relates to the field of detection equipment, in particular to a device for detecting masonry mortar strength through a pendulum bob knock-in method, which comprises a positioning bracket, a connecting frame, a pendulum bob, a rotation guide sleeve piece, a control switch, a translation guide sleeve piece and a probe, the connecting frame is arranged at the upper part of the positioning bracket, and the pendulum bob is rotationally arranged on the connecting frame; and the rotation guide kit is connected between the connecting frame and the pendulum bob. The pendulum bob is provided with the rotating guide sleeve piece, and after the hammer head of the pendulum bob swings downwards to the lowest point under the guiding effect of the rotating guide sleeve piece, the motion track of the hammer head is restrained to be a horizontal straight line, so that vertical components of component motion are mutually offset, and only acting force in the horizontal direction is reserved; in this way, the probe does not have component force in the vertical direction when bearing the acting force from the pendulum bob, so that the tip of the probe is not prone to inclining upwards in the moving process of the probe within the preset range, and detection data can be more accurate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of detection equipment, in particular to a device for detecting the strength of masonry mortar by pendulum knock-in method. BACKGROUND

[0002] The pendulum knock-in method is an indirect detection method for detecting the strength of masonry mortar, which determines the depth of the pendulum knocked into the mortar, and combines with the relevant calibration curve to estimate the compressive strength of the mortar.

[0003] The core device of the pendulum knock-in method is a pendulum mortar strength detector, which mainly includes a positioning support, a measuring pin, a pendulum, a pendulum shaft and a release device. The pendulum shaft is rotatably arranged on the positioning support, the tail end of the pendulum is fixedly connected with the pendulum shaft, the release device is arranged on the positioning support and is used for controlling the rotation of the pendulum shaft, the positioning support is provided with a mounting hole, and the measuring pin is arranged in the mounting hole and the tip of the measuring pin faces the surface of the measuring point mortar.

[0004] In use, the staff selects a representative measuring point on the masonry wall according to the detection purpose (such as sampling detection or full detection), then vertically stands the positioning support on the surface of the measuring point mortar, ensures that the tip of the measuring pin is in close contact with the mortar, fixes the support and the wall surface, then lifts the pendulum to a specified angle, locks it, releases it through the release device, so that the pendulum shaft drives the pendulum to freely swing down, at this time the pendulum impacts on the top of the measuring pin with a rated force, the measuring pin is knocked into the mortar, then the staff takes out the measuring pin from the mortar hole, blows the debris and impurities in the mortar hole through the rubber blowing, then measures the total depth of the measuring pin knocked into the mortar by using a depth detector, and finally compares the standard curve matched with the instrument to obtain the mortar strength estimation value of the measuring point.

[0005] However, the existing pendulum mortar strength detector has the following problems in use: after the pendulum freely swings down to the lowest point and collides with the measuring pin, the measuring pin moves into the measuring point mortar under the force, at this time the pendulum moves synchronously with the measuring pin under the action of inertia, and rebounds after the measuring pin stops moving. During the process that the pendulum moves synchronously with the measuring pin, the pendulum tilts and swings up, so that the force applied by the pendulum to the measuring pin has a vertical component, which hinders the measuring pin from entering the measuring point mortar, causes the detection data to deviate, and even causes the measuring hole of the measuring point mortar to crack when the strength of the measuring point mortar is low. SUMMARY

[0006] Therefore, it is necessary to provide a device for detecting the strength of masonry mortar by pendulum knock-in method in view of the problems of the existing pendulum mortar strength detector, so as to solve the problem that the detection data is inaccurate when the existing pendulum mortar strength detector detects the strength of the measuring point mortar.

[0007] The above-mentioned purpose is achieved by the following technical scheme: A device for detecting the strength of masonry mortar by pendulum knock-in method comprises: a positioning support; a connecting frame arranged on the upper part of the positioning support; a pendulum rotatably arranged on the connecting frame; a rotation guide set connected between the connecting frame and the pendulum, for enabling the pendulum to move in a preset range in a horizontal direction after freely falling to the lowest point; a control switch arranged on the connecting frame, for controlling the release of the pendulum; a translation guide set arranged on the lower part of the positioning support; a measuring needle slidingly arranged in the translation guide set.

[0008] Preferably, the rotation guide set comprises guide rings and a guide column, the two guide rings are arranged on the connecting frame along a first axis at intervals, the opposite surfaces of the two guide rings are provided with guide arc grooves, the guide column is arranged at the handle end of the pendulum, and the two ends of the guide column can slide along the guide arc grooves; After the pendulum freely falls to the lowest point, the guide column continues to slide along the guide arc grooves, so that the distance between the centers of the guide column and the guide rings decreases.

[0009] Preferably, a sliding waist groove is arranged on the side surface of the handle of the pendulum, a load-bearing rod is coaxially and rotatably arranged between the two guide rings, and the load-bearing rod is slidingly connected in the sliding waist groove.

[0010] Preferably, the handle of the pendulum is provided with a hammer head at each end, there are two guide columns, the two guide columns are arranged at the end of the handle of the pendulum, and the two guide columns can be selectively slidingly connected in the guide arc grooves.

[0011] Preferably, one end surface of the hammer head is circular, and the center of the end surface of the hammer head protrudes outward.

[0012] Preferably, both end surfaces of the hammer head are circular, and the centers of the end surfaces protrude outward.

[0013] Preferably, the hammer head is rotatably arranged on the handle.

[0014] Preferably, the connecting frame can move in a vertical direction relative to the positioning support.

[0015] Preferably, the translation guide set comprises a fixed sleeve, a moving sleeve, a plurality of clamping jaws, and a transmission member, the fixed sleeve is arranged on the positioning support, the moving sleeve is slidingly arranged in the fixed sleeve, the plurality of clamping jaws are circumferentially and equidistantly arranged in the fixed sleeve, and the plurality of clamping jaws can simultaneously approach or move away from the axis of the fixed sleeve, and the transmission member is connected between the plurality of clamping jaws and the moving sleeve. The transmission member is configured to move the plurality of jaws away from the axis of the fixed sleeve synchronously by the transmission member when the sleeve is moved towards the inside of the fixed sleeve.

[0016] Preferably, the positioning support is provided with a handle on the left and right sides.

[0017] The present application has the following advantages: The present application sets the rotation guide kit, the hammer head of the pendulum swings to the lowest point under the guidance of the rotation guide kit, and the movement track is constrained to be a horizontal straight line, so that the vertical components of the movement cancel each other out, and only the horizontal force is reserved, so that the measuring needle does not have a vertical component when the measuring needle is subjected to the force from the pendulum, and the tip of the measuring needle is not easy to tilt upward during the movement of the measuring needle in the preset range, which is beneficial to make the detection data more accurate. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a whole schematic view of the device for detecting the strength of masonry mortar by the pendulum knock-in method of the present application; Figure 2 It is a top view of the device for detecting the strength of masonry mortar by the pendulum knock-in method of the present application; Figure 3 It is Figure 2 It is an A-A sectional view; Figure 4 It is an exploded view of the device for detecting the strength of masonry mortar by the pendulum knock-in method of the present application; Figure 5 It is a structural schematic view of the connecting frame in the device for detecting the strength of masonry mortar by the pendulum knock-in method of the present application; Figure 6 It is a structural schematic view of the guide ring in the device for detecting the strength of masonry mortar by the pendulum knock-in method of the present application; Figure 7 It is a structural schematic view of the pendulum in the device for detecting the strength of masonry mortar by the pendulum knock-in method of the present application; Figure 8 It is an exploded view of the transmission member in the device for detecting the strength of masonry mortar by the pendulum knock-in method of the present application; Figure 9 It is a sectional view of the transmission member in the device for detecting the strength of masonry mortar by the pendulum knock-in method of the present application; Figure 10 It is a structural schematic view of the internal structure of the end connecting ring in the device for detecting the strength of masonry mortar by the pendulum knock-in method of the present application.

[0019] Wherein: 100, positioning support; 110, handle; 120, fixed plate; 130, screw rod; 140, hand wheel; 200, connecting frame; 210, load-bearing rod; 220, avoiding groove; 230, friction plate; 300, pendulum bob; 310, bob head; 320, bob handle; 321, sliding waist groove; 400, rotation guiding set; 410, guiding ring; 411, guiding arc groove; 4111, first arc groove; 4112, second arc groove; 4113, communicating notch; 420, guiding column; 500, control switch; 600, translation guiding set; 610, fixed sleeve; 620, moving sleeve; 630, clamping jaw; 640, transmission member; 641, rotation sleeve; 642, end connecting ring; 6421, inclined sliding groove; 643, sliding column; 644, limiting block; 645, first elastic member; 700, measuring needle. DETAILED DESCRIPTION

[0020] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the embodiments and in conjunction with the drawings. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application.

[0021] The serial numbers of components in this paper, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any sequence or technical meaning. The "connection" and "coupling" of the present application include direct and indirect connection (coupling) unless otherwise specified. In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0022] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0023] As Figures 1 to 10As shown, the device for detecting the strength of masonry mortar by pendulum knock-in method comprises a positioning support 100, a connecting frame 200, a pendulum 300, a rotation guide set 400, a control switch 500, a translation guide set 600 and a measuring needle 700. The connecting frame 200 is arranged on the upper part of the positioning support 100, the pendulum 300 is rotatably arranged on the connecting frame 200, the rotation guide set 400 is connected between the connecting frame 200 and the pendulum 300, the rotation guide set 400 is used to make the pendulum 300 move in a preset range in the horizontal direction after freely falling to the lowest point, the control switch 500 is arranged on the connecting frame 200, the control switch 500 is used to control the release of the pendulum 300, the translation guide set 600 is arranged on the lower part of the positioning support 100, and the measuring needle 700 is slidably arranged in the translation guide set 600.

[0024] In use, the worker vertically stands the positioning support 100 on the surface of the mortar at the measuring point, ensures that the tip of the measuring needle 700 is in close contact with the mortar, fixes the positioning support 100 to the surface of the wall, then the worker lifts the pendulum 300 to a specified height and locks it at the position by the control switch 500. When detecting, the worker releases the pendulum 300 by operating the control switch 500. At this time, the pendulum 300 freely falls under the action of its own gravity, moves in a preset range in the horizontal direction after freely falling to the lowest point under the guidance of the rotation guide set 400. In this way, the measuring needle 700 does not have a component force in the vertical direction when it is pushed by the pendulum 300 to move in a preset range, so the tip of the measuring needle 700 is not easy to tilt upward when the measuring needle 700 moves in a preset range, and the tip of the measuring needle 700 can be horizontally inserted into the mortar at the measuring point, which is beneficial to make the detection data more accurate. In addition, since the force applied by the pendulum 300 to the measuring needle 700 does not have a component force in the vertical direction, the universal applicability of the device is better, and it is more suitable for detecting the mortar at the measuring point with lower strength.

[0025] In further embodiments, as Figure 6 and Figure 7As shown, the rotation guide set 400 includes guide rings 410 and a guide column 420, the guide rings 410 are two, the two guide rings 410 are arranged on the connecting frame 200 along the first axis and are spaced apart, opposite surfaces of the two guide rings 410 are provided with guide arc grooves 411, the guide column 420 is arranged at the end of the hammer handle 320 of the pendulum 300, and two ends of the guide column 420 can slide along the guide arc grooves 411, after the pendulum 300 freely swings down to the lowest point, the guide column 420 continues to slide along the guide arc grooves 411, so that the distance between the center of the guide column 420 and the center of the guide ring 410 decreases, and for the groove shape of the guide arc grooves 411, specifically, the guide arc grooves 411 include a first arc groove 4111 and a second arc groove 4112, the first arc groove 4111 and the second arc groove 4112 are sequentially communicated in the counterclockwise direction, the first arc groove 4111 is concentric with the guide ring 410, and the center of the second arc groove 4112 is located below the center of the first arc groove 4111.

[0026] In use, the staff member lifts the pendulum 300 upward, so that the guide column 420 fixedly connected to the side surface of the hammer handle 320 of the pendulum 300 slides to the end groove bottom of the first arc groove 4111, at this time the pendulum 300 is lifted to the preset position, then the staff member releases the pendulum 300, at this time the pendulum 300 is blocked by the control switch 500 and cannot be released downward, then the staff member releases the pendulum 300 through the control switch 500, at this time the pendulum 300 freely swings down under the action of its own gravity, in the process that the pendulum 300 freely swings down from the highest point to the lowest point, the guide column 420 gradually slides from the end of the first arc groove 4111 to the junction position of the first arc groove 4111 and the second arc groove 4112, after the pendulum 300 freely swings down from the highest point to the lowest point, the pendulum 300 continues to swing under the action of its own inertial force, so the guide column 420 gradually slides from the junction position of the second arc groove 4112 and the first arc groove 4111 to the end of the second arc groove 4112, since the center of the second arc groove 4112 is located below the center of the first arc groove 4111, therefore the movement track of the hammer head 310 of the pendulum 300 is constrained to be a horizontal straight line after the pendulum 300 swings down to the lowest point under the action of the rotation guide set 400, so the vertical components of the divided movements cancel each other out, only the horizontal force is reserved, so when the measuring needle 700 is subjected to the force from the pendulum 300, the measuring needle 700 does not have a vertical component, therefore the tip of the measuring needle 700 is not easy to tilt upward in the process that the measuring needle 700 moves in the preset range, which is beneficial to make the detection data more accurate.

[0027] Further, as shown in FIG. 6, the rotation guide set 400 includes guide rings 410 and a guide column 420, the guide rings 410 are two, the two guide rings 410 are arranged on the connecting frame 200 along the first axis and are spaced apart, opposite surfaces of the two guide rings 410 are provided with guide arc grooves 411, the guide column 420 is arranged at the end of the hammer handle 320 of the pendulum 300, and two ends of the guide column 420 can slide along the guide arc grooves 411, after the pendulum 300 freely swings down to the lowest point, the guide column 420 continues to slide along the guide arc grooves 411, so that the distance between the center of the guide column 420 and the center of the guide ring 410 decreases, and for the groove shape of the guide arc grooves 411, specifically, the guide arc grooves 411 include a first arc groove 4111 and a second arc groove 4112, the first arc groove 4111 and the second arc groove 4112 are sequentially communicated in the counterclockwise direction, the first arc groove 4111 is concentric with the guide ring 410, and the center of the second arc groove 4112 is located below the center of the first arc groove 4111. Figure 3As shown, one end of the hammer head 310 is circular, and the center of the end surface of the hammer head 310 is raised outward to form a spherical surface, which is the same as the end surface of the existing cylindrical rubber hammer, so as to adapt to the existing probe 700 (the end thereof is also generally circular, and the middle part is arched upward). In this way, when the hammer head 310 contacts the probe 700, the contact surface is as small as possible, and the force is concentrated at one point, thereby increasing the pressure per unit area, so as to improve the knocking efficiency and effect.

[0028] When the hammer head 310 repeatedly hits the tail end of the probe 700, the contact surface of the hammer head 310 is damaged, such as being concave or deformed, which may cause a lateral force when the hammer head 310 contacts the tail end of the probe 700. To solve this problem, further, as shown in Figure 3 The contact point of the hammer head 310 after free swinging slightly deviates from the axis of the probe 700, and the hammer head 310 is rotatably connected to the hammer handle 320, rather than being fixedly installed on the hammer handle 320.

[0029] In this way, after each use of the hammer head 310, the worker can rotate the hammer head 310 by a certain angle to avoid the premature damage and deformation of the hammer head 310 due to continuous force at a certain position.

[0030] Further, the connecting frame 200 can move vertically relative to the positioning support 100, so that the position of the pendulum 300 can be adjusted to make the contact point of the hammer head 310 after free swinging slightly deviate from the axis of the probe 700. Specifically, a fixed plate 120 is arranged on the positioning support 100, a screw rod 130 is rotatably connected in the fixed plate 120, the screw rod 130 is threadedly connected with the connecting frame 200, and the upper end of the screw rod 130 is provided with a hand wheel 140. In addition, the side surface of the connecting frame 200 is in sliding abutment with the side surface of the positioning support 100, which is used to limit the movement of the connecting frame 200, so that the connecting frame 200 can move vertically.

[0031] Further, both ends of the hammer head 310 can be used as a working surface. After a period of use, the worker can disassemble the hammer head 310 from the hammer handle 320, and reverse the left and right positions of the hammer head 310.

[0032] Further, the control switch 500 can be specifically a plug, which is slidingly plugged on the connecting frame 200. After the pendulum 300 is lifted to a specified height, the plug is plugged on the connecting frame 200 by the worker. At this time, the pendulum 300 cannot freely swing downward under the blocking effect of the plug. When the pendulum 300 needs to freely swing downward, the worker pulls out the plug outward. At this time, the plug no longer limits the pendulum 300 to swing downward. At this time, the pendulum 300 can freely swing downward. In other embodiments, the control switch 500 can also be a spring return button. Compared with the plug, the spring return button is more convenient to use.

[0033] In further embodiments, as shown in Figure 3 、 Figure 6 and Figure 7 , a sliding waist groove 321 is formed on the side of the hammer handle 320 of the pendulum 300. The load bearing rod 210 is coaxially and rotatably arranged between the two guide rings 410, and the load bearing rod 210 is slidingly connected in the sliding waist groove 321.

[0034] The load bearing rod 210 is arranged to share the force borne by the guide column 420. The sliding waist groove 321 is formed on the side of the hammer handle 320 to adapt to the guiding cooperation of the guide column 420 and the guide arc groove 411. Specifically, during the movement of the guide column 420 in the first arc groove 4111, the load bearing rod 210 is always rotatably connected with the end of the sliding waist groove 321. When the guide column 420 slides to the inside of the second arc groove 4112, as the guide column 420 continues to slide along the second arc groove 4112, the load bearing rod 210 moves to the middle position relative to the sliding waist groove 321. In this way, the pendulum 300 can be adapted to move along the horizontal direction within a predetermined range after swinging to the lowest point.

[0035] After each measurement of the pendulum 300 is completed, the pendulum 300 is manually swung to the highest point position by the worker. The resetting mode causes the load bearing rod 210 to reciprocatingly rotate within a half circle range. However, this unique resetting mode can cause the local area of the load bearing rod 210 to be severely worn. To solve this problem, in further embodiments, as shown in Figure 3 and Figure 4As shown, the hammer handle 320 of the pendulum 300 is provided with a hammer head 310 at both ends, the end faces of the two ends of the hammer head 310 are circular, and the center of the end face is outwardly raised, the guide column 420 has two, the two guide columns 420 are respectively arranged at the end portions of the hammer handle 320 of the pendulum 300, and the two guide columns 420 are selectively slidably connected in the guide arc groove 411, in order to enable the two guide columns 420 to be selectively slidably connected in the guide arc groove 411, specifically, the through grooves 4113 are arranged at the upper and lower positions of the guide ring 410, wherein the through groove 4113 at the upper portion of the guide ring 410 is between the first arc groove 4111 and the second arc groove 4112, and the through groove 4113 at the lower portion of the guide ring 410 is in communication with the end of the first arc groove 4111.

[0036] When detecting the next detection point of the masonry mortar, the staff first fixes the positioning support 100 at the next detection point, and then manually resets the pendulum 300, specifically, the staff first reversely rotates the pendulum 300 until the guide column 420 on the pendulum 300 corresponds to the position of the through groove 4113, then the staff lifts the pendulum 300 with his hand, so that the guide column 420 at the lower portion of the pendulum 300 slides into the guide ring 410 through the through groove 4113, and the guide column 420 at the upper portion of the pendulum 300 slides out of the guide ring 410 through the through groove 4113, then the staff counterclockwise rotates the pendulum 300 (i.e. along the free pendulum direction of the pendulum 300), until the guide column 420 on the pendulum 300 slides to the end position of the first arc groove 4111 through the through groove 4113, at this time, the two hammer heads 310 are switched in position, i.e. the resetting is completed, in the resetting process, the overall rotation direction of the pendulum 300 is the same as the movement direction of the free pendulum of the pendulum 300, rather than reciprocating within half a circle, so that the problem of serious local wear of the load rod 210 can be effectively solved, then the staff releases the pendulum 300 through the control switch 500, and the free pendulum of the pendulum 300 can complete the detection of the current detection point.

[0037] It can be understood that, by arranging the hammer head 310 at both ends of the hammer handle 320, compared with arranging the hammer head 310 at only one end of the hammer handle 320, the resetting stroke can be shortened by half, which is beneficial to save resetting time and improve use efficiency, in addition, arranging the double hammer heads 310 can enable the two hammer heads 310 to be alternately used, which is beneficial to improve the service life of the hammer head 310.

[0038] Further, in order to enable the lower hammer head 310 to pass through the connecting frame 200 without interfering with the connecting frame 200, specifically, the avoiding groove 220 is arranged on the connecting frame 200, and the size of the avoiding groove 220 is matched with the movement track of the lower hammer head 310.

[0039] Further, in order to facilitate the staff to rotate the hammer head 310, specifically, a friction plate 230 is arranged at the bottom of the connecting frame 200, when the staff lifts the pendulum 300, the side surface of the hammer head 310 is in rolling contact with the friction plate 230, so as to force the hammer head 310 to rotate by a certain angle, so as to facilitate the switching of the contact position of the hammer head 310 and the measuring needle 700.

[0040] In further embodiments, as shown in Figures 8-10 The translation guide kit 600 includes a fixed sleeve 610, a moving sleeve 620, a plurality of clamping jaws 630, and a transmission member 640. The fixed sleeve 610 is arranged on the positioning support 100, the moving sleeve 620 is slidingly arranged in the fixed sleeve 610, the plurality of clamping jaws 630 are arranged in the fixed sleeve 610 at equal intervals in the circumferential direction, and the plurality of clamping jaws 630 can simultaneously move towards or away from the axis of the fixed sleeve 610. The transmission member 640 is connected between the plurality of clamping jaws 630 and the moving sleeve 620, and is configured to make the plurality of clamping jaws 630 move away from the axis of the fixed sleeve 610 synchronously when the moving sleeve 620 moves towards the inside of the fixed sleeve 610.

[0041] In the initial state, the measuring needle 700 is clamped by the plurality of clamping jaws 630, which prevents the measuring needle 700 from moving along its own axis and prevents relative shaking between the measuring needle 700 and the translation guide kit 600 before the pendulum 300 contacts the measuring needle 700.

[0042] After the pendulum 300 freely swings down, it first contacts the tail end of the measuring needle 700 and pushes the tip of the measuring needle 700 to insert into the measuring point mortar. Subsequently, the pendulum 300 continues to move under the action of inertia, contacts the moving sleeve 620 and pushes it to move along the axis. Since the transmission member 640 is configured to make the plurality of clamping jaws 630 move away from the axis of the fixed sleeve 610 synchronously when the moving sleeve 620 moves towards the inside of the fixed sleeve 610, the plurality of clamping jaws 630 no longer hinder the measuring needle 700 from continuing to insert into the measuring point mortar at this time, preventing the loss of excessive force transmitted to the measuring needle 700 by the pendulum 300.

[0043] Further, in order to guide the movement of the plurality of clamping jaws 630, a limiting block 644 is arranged on one side of the clamping jaw 630, and a guide groove is formed in the fixed sleeve 610 and extends along the radial direction of the fixed sleeve 610, and the limiting block 644 is slidingly connected in the guide groove.

[0044] Further, the transmission member 640 comprises a rotating sleeve 641, an end connecting ring 642 and a sliding column 643, the rotating sleeve 641 is rotationally connected in the fixed sleeve 610, one end of the rotating sleeve 641 is coaxially provided with the end connecting ring 642, the end connecting ring 642 is screw-connected with the moving sleeve 620, specifically, the end connecting ring 642 is provided with a screw strip, the inner side of the moving sleeve 620 is provided with a screw groove, the screw strip is matched in the screw groove, the inner part of the end connecting ring 642 is provided with an inclined sliding groove 6421, the extending direction of the inclined sliding groove 6421 is arranged at an angle with the radial direction of the end connecting ring 642, one side of the clamping jaw 630 is rotationally provided with the sliding column 643, the sliding column 643 is slidingly connected in the inclined sliding groove 6421. When the moving sleeve 620 moves, the rotating sleeve 641 is rotated through the screw cooperation between the moving sleeve 620 and the rotating sleeve 641, the rotation of the rotating sleeve 641 drives the sliding column 643 to drive the clamping jaw 630 to move away from the axis of the fixed sleeve 610 through the inclined sliding groove 6421, thus the clamping jaw 630 no longer hinders the measuring needle 700 to continue to move into the mortar of the measuring point.

[0045] Further, in order to improve the detection accuracy, the energy consumed in the transmission process of the transmission member 640 can be measured, and then combined with the required rated kinetic energy of the measuring needle 700, the gravitational potential energy of the pendulum 300 required can be calculated, so that the kinetic energy received by the measuring needle 700 after the pendulum 300 hits the measuring needle 700 can be ensured to be the rated kinetic energy.

[0046] Further, in order to facilitate the resetting of the moving sleeve 620, specifically, the first elastic member 645 is sleeved outside the rotating sleeve 641, one end of the first elastic member 645 abuts against the groove wall of the fixed sleeve 610, and the other end of the first elastic member 645 abuts against the moving sleeve 620.

[0047] In further embodiments, the left and right sides of the positioning bracket 100 are provided with handles 110, which are convenient for the staff to hold and operate.

[0048] Further, the device can move the center of gravity of the pendulum 300 to the middle position of the pendulum 300 by designing the pendulum 300 into a double hammer head structure, so that the staff holds the handle 110 with hands to make the positioning bracket 100 maintain the posture more labor-saving.

[0049] The technical features of the above embodiments can be combined arbitrarily, in order to make the description simple, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present application.

[0050] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A device for testing the strength of masonry mortar using a pendulum penetration method, characterized in that: include: Positioning bracket; A connecting frame is arranged on the upper part of the positioning bracket; A pendulum is rotatably mounted on a connecting frame; A rotation guide kit is connected between the connecting frame and the pendulum, and is used to allow the pendulum to freely swing down to the lowest point and then move horizontally within a preset range; A control switch, located on the connecting frame, is used to control the release of the pendulum; A translation guide kit is provided at the lower part of the positioning bracket; The stylus is slidably mounted in the translation guide assembly.

2. The device for detecting the strength of masonry mortar by the pendulum penetration method according to claim 1, characterized in that: The rotation guide kit includes a guide ring and a guide column. There are two guide rings, which are arranged on the connecting frame at intervals along the first axis. The opposite surfaces of the two guide rings are provided with guide arc grooves. The guide column is arranged at the end of the hammer handle of the pendulum, and both ends of the guide column can slide along the guide arc grooves. After the pendulum swings freely to the lowest point, the guide column continues to slide along the guide arc groove so that the distance between the center of the guide column and the center of the guide ring decreases.

3. The device for detecting the strength of masonry mortar by the pendulum penetration method according to claim 2, characterized in that: A sliding waist groove is provided on the side of the hammer handle of the pendulum, and a load-bearing rod is coaxially and rotatably arranged between the two guide rings, and the load-bearing rod is slidably connected in the sliding waist groove.

4. The device for detecting the strength of masonry mortar using a pendulum hammer penetration method according to claim 3, characterized in that: Both ends of the pendulum hammer handle are provided with hammer heads. There are two guide columns, which are respectively arranged at the ends of the pendulum hammer handle. One of the two guide columns can be slidably connected in the guide arc groove.

5. The device for detecting the strength of masonry mortar using a pendulum hammer penetration method according to claim 4, characterized in that: One end surface of the hammer head is circular, and the center of the end surface bulges outwards.

6. The device for detecting the strength of masonry mortar using a pendulum penetration method according to claim 4, characterized in that: Both end faces of the hammer head are circular, and the centers of the end faces bulge outwards.

7. The device for testing masonry mortar strength by a pendulum hammer penetration method according to claim 4, characterized in that: The hammer head is rotatably arranged on the hammer handle.

8. The device for testing masonry mortar strength by a pendulum penetration method according to claim 1, characterized in that: The connecting frame can move in a vertical direction relative to the positioning bracket.

9. The device for detecting the strength of masonry mortar using a pendulum hammer penetration method according to claim 1, characterized in that: The translation guide kit includes a fixed sleeve, a movable sleeve, a clamping claw and a transmission member. The fixed sleeve is arranged on a positioning bracket, the movable sleeve is slidably arranged in the fixed sleeve, there are multiple clamping claws, and the multiple clamping claws are arranged in the fixed sleeve at equal intervals in the circumferential direction. The multiple clamping claws can simultaneously approach or move away from the axis of the fixed sleeve. The transmission member is connected between the multiple clamping claws and the movable sleeve. The transmission member is configured so that when the movable sleeve moves toward the interior of the fixed sleeve, the plurality of clamping claws are synchronously moved away from the axis of the fixed sleeve through the transmission member.

10. The device for testing masonry mortar strength by a pendulum penetration method according to claim 1, characterized in that: Handles are provided on the left and right sides of the positioning bracket.

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