Portable meter for measuring water-cement ratio and specific gravity of cement mortar and use method of portable meter

Abstract

The invention discloses a portable cement mortar water-cement ratio and specific gravity measuring meter which comprises a dynamometer box body, a water-cement ratio scale plate is embedded in the front surface of the dynamometer box body, and a splicing screw sleeve is mounted on the inner side of the upper end of the dynamometer box body. The device has the beneficial effects that the water-cement ratio scale plate and the force measuring spring are arranged, the zero setting screw rod can be driven by the zero setting nut to carry out height adjustment along the splicing screw sleeve, the bottom structure is driven to carry out height adjustment during adjustment, the zero setting effect can be achieved through adjustment, then a barrel with a standard volume is hung on the hook, and the water-cement ratio scale plate and the force measuring spring are used for measuring the water-cement ratio. The pointer moves to a corresponding water-cement ratio scale area, so that the water-cement ratio scale plate adopts a standard volume barrel to control the volume of measured cement mortar, a dynamometer is adopted to read the mass, the mass reading is converted into the specific gravity to make a scale table, and then the specific gravity calculation is converted into the water-cement ratio to make the scale table; and the water-cement ratio of the cement mortar can be effectively and directly read, so that the working efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of construction engineering quality inspection, and specifically to a portable cement mortar water-cement ratio and specific gravity measuring meter and a use method thereof. Background Art

[0002] During the construction of mixing piles, the quality of cement mortar needs to be checked several times a day. The main inspection object is the water-cement ratio of cement mortar. The testing instruments used on site are balance-type hydrometers. Balance-type hydrometers are heavy and have poor portability. They cannot directly obtain the water-cement ratio of cement mortar and need to be calculated and converted. At the same time, based on the settings and programmed specific gravity measurement timer, the hook structure at the bottom is easy to hang on external devices when carried, causing damage to the device. Finally, when testing the water-cement ratio of cement mortar, the observation area of ​​the measurement is easy to contact the cement mortar, causing surface wear, making it difficult to see the scale and affecting normal detection. Summary of the invention

[0003] The object of the present invention is to provide a portable cement mortar water-cement ratio and specific gravity measuring meter and a use method thereof, so as to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a portable cement mortar water-cement ratio and specific gravity measuring meter, comprising a dynamometer box body, a water-cement ratio scale plate is embedded in the front of the dynamometer box body, and a splicing screw sleeve is installed on the inner side of the upper end of the dynamometer box body, a zero adjustment screw is arranged on the inner side of the splicing screw sleeve, and a fixed plate is installed on the outer side of the lower end of the zero adjustment screw, a force measuring spring is installed at the bottom of the fixed plate, and a movable plate is installed at the bottom of the force measuring spring, a scale pointer is installed on the front of the movable plate, and a spring is installed at the lower end of the bottom of the movable plate. There is a hook, a metal frame is embedded in the front of the dynamometer box body, and a transparent plate is embedded in the back of the metal frame, positioning plates are arranged on the inner sides of the upper and lower ends of the metal frame, and a movable block is installed on the outer side of the positioning plate, three groups of auxiliary springs are arranged on the outer side of the movable block, and the auxiliary springs are located on the inner sides of the upper and lower ends of the dynamometer box body, adjusting sliders are arranged inside the two ends of the dynamometer box body, and two groups of supporting springs are arranged at the bottom of the adjusting slider, a limiting plate is arranged on the outer side of the middle part of the adjusting slider, and a protective cover is installed at the bottom of the limiting plate.

[0005] Preferably, a handle is installed on the top of the dynamometer box body, and two sets of splicing grooves are opened on the inner sides of the upper end and the lower end of the dynamometer box body.

[0006] Preferably, adjustment slots are provided on both sides of the dynamometer box body, and a combined back cover is provided on the back side of the dynamometer box body.

[0007] Preferably, a splicing frame is installed on the front of the upper and lower ends of the combined back cover, and splicing slide columns are installed on both sides of the splicing frame. The splicing slide columns are located on the inner side of the splicing slide groove, and fixed columns are installed on the front of the four corners of the combined back cover.

[0008] Preferably, positioning grooves are provided at the top and bottom of the metal frame, and the positioning grooves are located on the outside of the positioning plate, and a baffle is installed in the middle of the movable block.

[0009] Preferably, a zero adjustment nut is installed at the top of the zero adjustment screw, a combined bearing is installed at the lower end of the zero adjustment screw, and the combined bearing is located on the inner side of the fixed plate.

[0010] Preferably, a connecting rod is installed on the top of the hook, and the connecting rod is located at the bottom of the movable plate, and a hanging handle is provided on the inner side of the hook.

[0011] Preferably, a fixed bearing is installed in the middle of the adjusting slider, and a sliding column is provided on one side of the fixed bearing, the sliding column is located on the inner side of the adjusting slide groove, two groups of blocks are installed on the inner side of the protective cover, and the blocks are located at the bottom of the dynamometer box body.

[0012] Preferably, a standard volume barrel is provided on the inner side of the lower end of the hanging handle, and a storage groove is opened on the inner side of the standard volume barrel, and a barrel cover is installed on the top of the storage groove.

[0013] Preferably, the method comprises the following steps: S1. First, grasp the protective cover at the bottom, and pull the protective cover to control the two sets of adjustment sliders to compress the support spring at the bottom. After compression, the protective cover will be separated from the inner hook. After separation, the limit plate will be controlled to flip along the fixed bearing. After flipping, the protective cover will be released, and the support spring will automatically push the adjustment slider to rise. After rising, the protective cover will be placed on the back of the dynamometer box body, and the hanging handle of the standard volume barrel will be placed on the hook; S2. Then, grasp the zero adjustment nut as required, and rotate it to drive the zero adjustment screw to rotate. Rotate it to control the height of the fixed disk along the spliced ​​screw sleeve. While adjusting, the scale pointer on the front of the movable disk at the bottom will adjust the height synchronously, so as to observe the position indicated by the scale to determine whether it is zeroed; S3. Take samples for testing again. Add cement mortar into the standard volume barrel. Cover and squeeze the barrel cover. Excess cement mortar inside is discharged through the overflow hole on the top of the barrel cover. Clean it. Then pull the whole dynamometer box and the standard volume barrel at the bottom in the vertical direction. The standard volume barrel at the bottom will stretch the internal force measuring spring and drive the scale pointer to slide along the inner side of the water-cement ratio scale plate. After the sliding stops, the judgment can be made according to the degree. S4. Finally, when the surface of the transparent plate is worn and it is difficult to see the water-cement ratio scale plate inside, buckle the two sets of movable blocks at the same time and extend them outward to compress the auxiliary spring. When the movable blocks are extended outward, the positioning plate will be separated from the positioning groove. After separation, the metal frame and the transparent plate inside can be removed, and then the transparent plate can be removed from the inside of the metal frame, and replaced with a new transparent plate. Repeat the operation to install the metal frame and the transparent plate back to their original position to achieve the replacement of the transparent plate.

[0014] Compared with the prior art, the invention has the following beneficial effects: the invention is provided with a water-cement ratio scale plate and a force measuring spring, and the zeroing nut can be used to drive the zeroing screw to adjust the height along the splicing screw sleeve, and the bottom structure will be driven to adjust the height during adjustment, and the adjustment can achieve the effect of zeroing, and then the cement mortar to be tested is placed in a standard volume bucket and hung on a hook for testing, and the pointer can be moved to the corresponding water-cement ratio scale area, so that the water-cement ratio scale plate uses a standard volume bucket to control the volume of the measured cement mortar, uses a dynamometer to read the mass, converts the mass reading into a specific gravity to make a scale, and then converts the specific gravity calculation into a water-cement ratio to make a scale, effectively and directly reading the effect of the cement mortar water-cement ratio, thereby improving work efficiency; By providing an adjustment slider and a protective cover, the adjustment slider can be used to slide and adjust along the inner side of the adjustment slot, and the support spring at the bottom will push the adjustment slider up to keep the protective cover close to the bottom of the dynamometer box body to protect the hook. The fixed bearing can assist the limit plate to flip, so as to keep the protective cover moving to the back of the dynamometer box body to avoid affecting the normal measurement of the device. The protective cover can be used to provide protection for the hook when not in use to avoid the problem of the hook being hung on the surface of an external object and causing damage; By providing a positioning plate and a metal frame, the metal frame can be used to limit the transparent plate inside, and the positioning groove can provide an engagement position for the top plate. The positioning plate can be controlled to be inserted into the inner side of the positioning groove to limit the metal frame by pushing the movable block outward through an auxiliary spring. This structure can be used to flexibly disassemble the metal frame, making it easy to replace the transparent plate inside to avoid affecting the observation scale and measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the structure of the dynamometer box of the present invention; Figure 3 It is a schematic diagram of the structure of the combined backplane of the present invention; Figure 4 It is a schematic diagram of the hook structure of the present invention; Figure 5 It is a schematic diagram of the transparent plate structure of the present invention; Figure 6 It is a schematic diagram of the protective cover structure of the present invention; Figure 7 It is a schematic diagram of the standard volume barrel structure of the present invention; Figure 8 It is a schematic diagram of the upper section of the water-cement ratio scale plate of the present invention; Fig. 9 It is a schematic plan view of the middle section of the water-cement ratio scale plate of the present invention; Fig.10 It is a plan view of the lower section of the water-cement ratio scale plate of the present invention.

[0016] In the figure: 1. dynamometer box; 101. hand piece; 102. splicing slide; 103. adjusting slide; 104. water-cement ratio scale plate; 2. combined back cover; 201. fixed column; 202. splicing frame; 203. splicing slide column; 3. transparent plate; 301. metal frame; 302. positioning groove; 303. auxiliary spring; 304. movable block; 305. positioning plate; 306. baffle; 4. force measuring spring; 401. splicing screw sleeve; 4 02. Zero adjustment nut; 403. Zero adjustment screw; 404. Combined bearing; 405. Fixed plate; 5. Hook; 501. Movable plate; 502. Scale pointer; 503. Connecting rod; 6. Protective cover; 601. Adjusting slider; 602. Support spring; 603. Fixed bearing; 604. Sliding column; 605. Limiting plate; 606. Stopper; 7. Standard volume barrel; 701. Hanging handle; 702. Storage tank; 703. Barrel cover. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the specification of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0018] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0019] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0020] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that an article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0021] In the description of the present application, it should be noted that the terms "upper", "lower", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0022] In the description of this application, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0023] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and the features in the embodiments can be mutually exclusive.

[0024] See also Figure 1-10The present invention provides a technical solution: a portable cement mortar water-cement ratio and specific gravity measuring meter, comprising a dynamometer box body 1, a water-cement ratio scale plate 104 is embedded in the front of the dynamometer box body 1, and a splicing screw sleeve 401 is installed on the inner side of the upper end of the dynamometer box body 1, a zeroing screw 403 is arranged on the inner side of the splicing screw sleeve 401, and a fixed plate 405 is installed on the outer side of the lower end of the zeroing screw 403, a force measuring spring 4 is installed at the bottom of the fixed plate 405, and a movable plate 501 is installed at the bottom of the force measuring spring 4, a scale pointer 502 is installed on the front of the movable plate 501, and a hook 5 is installed at the lower end of the bottom of the movable plate 501, and the dynamometer box body 1 is embedded with a metal frame 301 on the front side, and a transparent plate 3 is embedded with the back side of the metal frame 301, a positioning plate 305 is arranged on the inner side of the upper and lower ends of the metal frame 301, and a movable block 304 is installed on the outer side of the positioning plate 305, three groups of auxiliary springs 303 are arranged on the outer side of the movable block 304, and the auxiliary springs 303 are located on the inner side of the upper and lower ends of the dynamometer box body 1, an adjusting slider 601 is arranged inside the two ends of the dynamometer box body 1, and two groups of supporting springs 602 are arranged at the bottom of the adjusting slider 601, a limiting plate 605 is arranged on the outer side of the middle part of the adjusting slider 601, and a protective cover 6 is installed at the bottom of the limiting plate 605.

[0025] Through the above technical scheme, a water-cement ratio scale plate 104 and a force measuring spring 4 are provided, and the zeroing screw 403 can be driven by the zeroing nut 402 to adjust the height along the splicing screw sleeve 401. When adjusting, the bottom structure will be driven to adjust the height, and the adjustment can achieve the effect of zeroing. Then, when the cement mortar to be tested is placed in the standard volume bucket 7, it is hung on the hook 5 for testing, and the pointer can move to the corresponding water-cement ratio scale area. As a whole, the water-cement ratio scale plate 104 uses the standard volume bucket 7 to control the volume of the measured cement mortar, and uses a dynamometer to read the mass, and the mass reading is converted into a specific gravity to make a scale table, and then the specific gravity calculation is converted into a water-cement ratio to make a scale table, which effectively and directly reads the effect of the water-cement ratio of the cement mortar, thereby improving work efficiency. By providing an adjusting slider 601 and a protective cover 6, the adjusting slider 601 can be used to slide and adjust along the inner side of the adjusting slide groove 103, and the supporting spring at the bottom 602 will push the adjustment slider 601 to rise so as to keep the protective cover 6 close to the bottom of the dynamometer box body 1 to protect the hook 5. The fixed bearing 603 can assist the limit plate 605 to flip over, so as to keep the protective cover 6 moving to the back of the dynamometer box body 1 to avoid affecting the normal measurement of the device. The protective cover 6 can be used to provide protection for the hook 5 when not in use to avoid the problem of the hook 5 being hung on the surface of an external object and causing damage. By providing a positioning plate 305 and a metal frame 301, the metal frame 301 can be used to limit the inner transparent plate 3, and the positioning groove 302 can provide an engaging position for the top plate. The auxiliary spring 303 pushes the movable block 304 outward to control the positioning plate 305 to be inserted into the inner side of the positioning groove 302 to limit the metal frame 301. The structure can be used to flexibly disassemble the metal frame 301, so as to facilitate the replacement of the inner transparent plate 3 to avoid affecting the observation scale and affecting the measurement.

[0026] Furthermore, a hand piece 101 is installed on the top of the dynamometer box body 1 , and two sets of splicing grooves 102 are opened on the inner sides of the upper end and the lower end of the dynamometer box body 1 .

[0027] Through the above technical solution, the handle 101 is used to suspend the dynamometer box body 1, and the splicing slide groove 102 is used to limit the splicing slide column 203 to maintain the stability of the splicing.

[0028] Furthermore, adjustment slots 103 are provided on both sides of the dynamometer box body 1 , and a combined back cover 2 is provided on the back of the dynamometer box body 1 .

[0029] Through the above technical solution, the adjustment slide groove 103 is used to limit the upward and downward movement of the sliding column 604.

[0030] Furthermore, a splicing frame 202 is installed on the front of the upper and lower ends of the combined back cover 2, and splicing slide columns 203 are installed on both sides of the splicing frame 202. The splicing slide columns 203 are located on the inner side of the splicing slide groove 102, and fixed columns 201 are installed on the front of the four corners of the combined back cover 2.

[0031] Through the above technical solution, the combined back cover 2 can be disassembled to repair the inner structure, the splicing slide column 203 can be inserted into the inner side of the splicing slide groove 102 to limit the combined back cover 2, and the fixing column 201 is used to install the bolt structure for combination.

[0032] Furthermore, positioning grooves 302 are provided at the top and bottom of the metal frame 301 , and the positioning grooves 302 are located outside the positioning plate 305 , and a baffle 306 is installed in the middle of the movable block 304 .

[0033] Through the above technical solution, the positioning groove 302 can limit the positioning plate 305, and the baffle 306 can prevent mortar from entering the interior and causing blockage.

[0034] Furthermore, a zero adjustment nut 402 is installed on the top of the zero adjustment screw 403 , and a combined bearing 404 is installed on the lower end of the zero adjustment screw 403 , and the combined bearing 404 is located on the inner side of the fixed plate 405 .

[0035] Through the above technical solution, the zeroing nut 402 is used to control the rotation of the zeroing screw 403 to achieve the zeroing effect, and the combined bearing 404 is used to Furthermore, a connecting rod 503 is installed on the top of the hook 5 , and the connecting rod 503 is located at the bottom of the movable plate 501 , and a hanging handle 701 is provided on the inner side of the hook 5 .

[0036] Through the above technical solution, the connecting rod 503 is used to connect the hook 5 at the bottom and the movable plate 501.

[0037] Furthermore, a fixed bearing 603 is installed in the middle of the adjusting slider 601, and a sliding column 604 is provided on one side of the fixed bearing 603, and the sliding column 604 is located on the inner side of the adjusting slide groove 103, and two groups of blocks 606 are installed on the inner side of the protective cover 6, and the blocks 606 are located at the bottom of the dynamometer box body 1.

[0038] Through the above technical solution, the fixed bearing 603 is used to assist the limit plate 605 to flip and adjust the angle, the sliding column 604 can slide and adjust along the inner side of the adjustment slot 103, and the stopper 606 is used to limit the protective cover 6 to avoid squeezing the hook 5.

[0039] Furthermore, a standard volume barrel 7 is provided on the inner side of the lower end of the hanging handle 701 , and a storage groove 702 is opened on the inner side of the standard volume barrel 7 , and a barrel cover 703 is installed on the top of the storage groove 702 .

[0040] Through the above technical solution, the standard volume barrel 7 can store a fixed volume of cement mortar for measuring the water-cement specific gravity, and the barrel cover 703 can be closed to achieve a quantitative effect, while the excess mortar can be discharged through the overflow port on the top.

[0041] Further, the following steps are included: S1. First, grasp the protective cover 6 at the bottom, and control the two groups of adjusting sliders 601 to compress the supporting spring 602 at the bottom by pulling the protective cover 6. After compression, the protective cover 6 will be separated from the inner hook 5. After separation, the limit plate 605 will be controlled to flip along the fixed bearing 603. After flipping, the protective cover 6 will be released, and the supporting spring 602 will automatically push the adjusting slider 601 to rise. After rising, the protective cover 6 will be placed on the back of the dynamometer box body 1, and the hanging handle 701 of the standard volume barrel 7 will be placed on the hook 5. S2. Then, grasp the zero adjustment nut 402 as required, and rotate it to drive the zero adjustment screw 403 to rotate. The rotation can control the fixed plate 405 to adjust the height along the splicing screw sleeve 401. At the same time, the scale pointer 502 on the front of the movable plate 501 at the bottom will adjust the height synchronously, so as to observe the indicated position of the scale to determine whether it is zeroed; S3, sampling and testing is performed again, cement mortar is added into the interior of the standard volume barrel 7, and then the barrel cover 703 is covered and squeezed, and the excess cement mortar inside is discharged through the overflow hole on the top of the barrel cover 703, and cleaned, and then the whole dynamometer box body 1 and the standard volume barrel 7 at the bottom are pulled up in the vertical direction, and the standard volume barrel 7 at the bottom will stretch the internal force measuring spring 4 and drive the scale pointer 502 to slide along the inner side of the water-cement ratio scale plate 104. After the sliding stops, the judgment can be made according to the degree; S4. Finally, when the surface of the transparent plate 3 is worn and it is difficult to see the water-cement ratio scale plate 104 inside, the two sets of movable blocks 304 are buckled at the same time and extended to compress the auxiliary spring 303. When the movable blocks 304 are extended, the positioning plate 305 will be separated from the positioning groove 302. After separation, the metal frame 301 and the transparent plate 3 inside can be removed, and then the transparent plate 3 is removed from the inside of the metal frame 301, and a new transparent plate 3 is replaced. The metal frame 301 and the transparent plate 3 are installed back to their original positions in a repeated operation to achieve the replacement of the transparent plate 3.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A portable cement mortar water-cement ratio and specific gravity measuring instrument, comprising a dynamometer box (1), characterized in that: The front of the dynamometer box body (1) is embedded with a water-cement ratio scale plate (104), and a splicing screw sleeve (401) is installed on the inner side of the upper end of the dynamometer box body (1), a zero adjustment screw rod (403) is installed on the inner side of the splicing screw sleeve (401), and a fixed plate (405) is installed on the outer side of the lower end of the zero adjustment screw rod (403), a force measuring spring (4) is installed on the bottom of the fixed plate (405), and a movable plate (501) is installed on the bottom of the force measuring spring (4), a scale pointer (502) is installed on the front of the movable plate (501), and a hook (5) is installed on the lower end of the bottom of the movable plate (501), and a metal frame (301) is embedded on the front of the dynamometer box body (1), and the metal frame (301) is installed on the inner side of the splicing screw sleeve (401), and a fixed plate (405) is installed on the outer side of the lower end of the zero adjustment screw rod (403), and a force measuring spring (4) is installed on the bottom of the fixed plate (405). A transparent plate (3) is embedded in the back of the frame (301); positioning plates (305) are arranged on the inner sides of the upper and lower ends of the metal frame (301); a movable block (304) is installed on the outer side of the positioning plate (305); three groups of auxiliary springs (303) are arranged on the outer side of the movable block (304); the auxiliary springs (303) are located on the inner sides of the upper and lower ends of the dynamometer box body (1); adjusting sliders (601) are arranged inside the two ends of the dynamometer box body (1); two groups of supporting springs (602) are arranged at the bottom of the adjusting slider (601); a limiting plate (605) is arranged on the outer side of the middle part of the adjusting slider (601); and a protective cover (6) is installed at the bottom of the limiting plate (605).

2. A portable cement mortar water-cement ratio and specific gravity measuring meter according to claim 1, characterized in that: A hand piece (101) is installed on the top of the dynamometer box body (1), and two groups of splicing slide grooves (102) are provided on the inner sides of the upper and lower ends of the dynamometer box body (1).

3. A portable cement mortar water-cement ratio and specific gravity measuring meter according to claim 1, characterized in that: Adjustment slide grooves (103) are provided on both sides of the dynamometer box body (1), and a combined back cover (2) is provided on the back of the dynamometer box body (1).

4. A portable cement mortar water-cement ratio and specific gravity measuring meter according to claim 3, characterized in that: Splicing frames (202) are installed on the front of the upper and lower ends of the combined back cover (2), and splicing sliding columns (203) are installed on both sides of the splicing frames (202), the splicing sliding columns (203) are located on the inner side of the splicing sliding groove (102), and fixing columns (201) are installed on the front of the four corners of the combined back cover (2).

5. A portable cement mortar water-cement ratio and specific gravity measuring meter according to claim 1, characterized in that: The top and bottom of the metal frame (301) are provided with positioning grooves (302), and the positioning grooves (302) are located outside the positioning plate (305). A baffle (306) is installed in the middle of the movable block (304).

6. A portable cement mortar water-cement ratio and specific gravity measuring meter according to claim 1, characterized in that: A zero adjustment nut (402) is installed at the top of the zero adjustment screw (403), a combined bearing (404) is installed at the lower end of the zero adjustment screw (403), and the combined bearing (404) is located on the inner side of the fixed plate (405).

7. A portable cement mortar water-cement ratio and specific gravity measuring meter as claimed in claim 1, characterized in that: A connecting rod (503) is installed on the top of the hook (5), and the connecting rod (503) is located at the bottom of the movable plate (501). A hanging handle (701) is provided on the inner side of the hook (5).

8. A portable cement mortar water-cement ratio and specific gravity measuring meter according to claim 1, characterized in that: A fixed bearing (603) is installed in the middle of the adjusting slider (601), and a sliding column (604) is provided on one side of the fixed bearing (603), and the sliding column (604) is located on the inner side of the adjusting slide groove (103). Two groups of stoppers (606) are installed on the inner side of the protective cover (6), and the stoppers (606) are located at the bottom of the dynamometer box body (1).

9. A portable cement mortar water-cement ratio and specific gravity measuring meter according to claim 7, characterized in that: A standard volume barrel (7) is arranged on the inner side of the lower end of the hanging handle (701), and a storage groove (702) is opened on the inner side of the standard volume barrel (7), and a barrel cover (703) is installed on the top of the storage groove (702).

10. A method for using an electric constant temperature air blowing thermoplastic film heating device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. First, grasp the protective cover (6) at the bottom, and control the two sets of adjustment sliders (601) to compress the support spring (602) at the bottom by pulling the protective cover (6). After compression, the protective cover (6) will be separated from the inner hook (5). After separation, the limit plate (605) is controlled to flip along the fixed bearing (603). After flipping, the protective cover (6) is released, and the support spring (602) will automatically push the adjustment slider (601) to rise. After rising, the protective cover (6) will be placed on the back of the dynamometer box (1), and the hanging handle (701) of the standard volume barrel (7) is placed on the hook (5); S2. Then, grasp the zero adjustment nut (402) as required, and rotate the zero adjustment screw (403) to rotate. The rotation can control the fixed plate (405) along the splicing screw sleeve (401) to adjust the height. At the same time, the scale pointer (502) on the front of the movable plate (501) at the bottom will adjust the height synchronously, so as to observe the position indicated by the scale to determine whether it is zeroed; S3, sampling and testing is performed again, cement mortar is added into the interior of the standard volume barrel (7), and then the barrel cover (703) is covered and squeezed, and the excess cement mortar inside is discharged through the overflow hole on the top of the barrel cover (703), and then cleaned, and then the whole dynamometer box (1) and the standard volume barrel (7) at the bottom are pulled up in the vertical direction, and the standard volume barrel (7) at the bottom stretches the internal force measuring spring (4) and drives the scale pointer (502) to slide along the inner side of the water-cement ratio scale plate (104), and after the sliding stops, the judgment can be made according to the degree; S4. Finally, when the surface of the transparent plate (3) is worn and it is difficult to see the water-cement ratio scale plate (104) inside, the two sets of movable blocks (304) are simultaneously buckled and extended to compress the auxiliary spring (303). When the movable blocks (304) are extended, the positioning plate (305) will be separated from the positioning groove (302). After separation, the metal frame (301) and the transparent plate (3) inside can be removed, and then the transparent plate (3) is removed from the inside of the metal frame (301), and a new transparent plate (3) is replaced. The metal frame (301) and the transparent plate (3) are installed back to their original positions in a repeated operation to achieve the replacement of the transparent plate (3).

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