Steel bar deformation measuring device

Abstract

The utility model discloses a reinforcing steel bar deformation measuring device, which relates to the technical field of measuring devices and comprises a bottom plate, a clamping assembly and a flange plate, a limiting cylinder is integrally formed at one end of the flange plate, a mechanical sensor is arranged in the limiting cylinder, and the limiting cylinder is in threaded connection with the mechanical sensor. The mechanical sensor penetrates to the outside of the end, away from the limiting cylinder, of the flange plate, and a detection mechanism used for measuring the reinforcing steel bars with the mechanical sensor is arranged on the bottom plate. According to the utility model, the detection mechanism can drive the dynamic sensor to rotate while driving the limiting cylinder and the dynamic sensor to displace through the flange plate, so that the detection mechanism can be automatically contacted with the outer walls of different types of steel bars, and electric signals generated by deformation can be transmitted to a data terminal through a wire along with the displacement of the dynamic sensor; therefore, the purpose of automatically detecting the steel bars of different models can be achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to measuring device technical field, concretely is a reinforcing steel bar deformation measuring device. BACKGROUND

[0002] Reinforcing steel bar is steel material for reinforced concrete and prestressed reinforced concrete, is mainly used for bearing tension and pressure, is widely used in building structure, and reinforcing steel bar is in production, in order to verify the mechanical properties of reinforcing steel bar, assesses the mechanical properties and applicability of reinforcing steel bar, to ensure reinforcing steel quality, for this need to measure the residual deformation of reinforcing steel bar, the existing measuring device is usually accurate measurement to the outer wall of reinforcing steel bar by using mechanical sensor.

[0003] According to the patent document with the announcement number CN218723835U, a reinforcing steel bar residual deformation measuring device is disclosed, which comprises a base and a placing seat fixed on the upper surface of the base on both sides, the upper surface of the placing seat is fixedly connected with sliding columns on both sides, the top end of the sliding column is fixedly connected with a top plate, and the outer surface of the sliding column is slidably sleeved with a clamping block. The reinforcing steel bar residual deformation measuring device, by cooperation of the telescopic rod, the electric sliding table, the displacement sensor, the rotating roller and the display screen, the rotating roller is tightly pressed against the outer surface of the reinforcing steel bar under the action of the spring, the displacement sensor detects the change of the position of the telescopic rod, and then the residual deformation of the reinforcing steel bar is measured, and the value of the residual deformation of the reinforcing steel bar is displayed on the display screen, so that the device has the function of automatically detecting the residual deformation of the reinforcing steel bar, and the detection efficiency of the residual deformation of the reinforcing steel bar is further improved, and the staff can more intuitively observe the residual deformation of the reinforcing steel bar.

[0004] The above-mentioned patent in the use process, by telescopic rod can along with the outer wall of reinforcing steel bar telescopic displacement, to this measures the residual deformation of reinforcing steel bar, but in the process of clamping and fixing reinforcing steel bar, need artificial always push rotating roller to compress spring, after clamping and fixing reinforcing steel bar, can release rotating roller, therefore the installation of reinforcing steel bar is more inconvenient, in order to be able to automatically detect different models of reinforcing steel bar, based on this, now provide a reinforcing steel bar deformation measuring device, can eliminate the drawbacks of the existing device. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a reinforcing steel bar deformation measuring device to solve the problems in the background art.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] The utility model provides a reinforcing steel bar deformation measuring device, including the bottom plate, the top end of bottom plate is symmetrically equipped with two clamping components for clamping and fixing the end of reinforcing steel bar, the flange plate is located one side of a clamping component, one end of flange plate is integrally formed with the limit cylinder, the inside of limit cylinder is equipped with the mechanical sensor, limit cylinder is connected with mechanical sensor, mechanical sensor penetrates to the outside of one end of flange plate far from limit cylinder, the detection mechanism for driving mechanical sensor to measure reinforcing steel bar is arranged on the bottom plate,

[0008] The detection mechanism comprises two fixed supporting plates symmetrically and fixedly connected to the top end of the bottom plate, the two fixed supporting plates are located on the side of the two clamping components respectively, one end of one fixed supporting plate away from the other fixed supporting plate is provided with a motor, the output end of the motor is fixedly connected with a lead screw, the lead screw is located between the two fixed supporting plates, the lead screw is rotatably connected with the other fixed supporting plate through a rotating shaft, the outer side of the lead screw is symmetrically provided with two limiting sliding rods, the two limiting sliding rods are fixedly connected with the two fixed supporting plates respectively, a movable sliding table is slidably sleeved on the outer wall of the lead screw, the movable sliding table is threadedly connected with the lead screw, and the movable sliding table is slidably sleeved on the outer wall of the two limiting sliding rods.

[0009] On the basis of the above technical scheme, the utility model further provides the following optional technical schemes:

[0010] In an optional scheme, the detection mechanism further comprises a supporting assembly arranged at the top end of the movable sliding table.

[0011] The supporting assembly comprises a supporting plate fixedly connected to the top end of the movable sliding table, a supporting rotating column is arranged on the upper surface of the supporting plate, a supporting cylinder is fixedly connected to the top end of the supporting rotating column, the supporting cylinder is fixedly connected with the flange plate through bolts, and the mechanical sensor is located on the inner side of the supporting cylinder.

[0012] A rotating assembly is arranged on the supporting plate, and the rotating assembly is used for driving the supporting rotating column to rotate.

[0013] In an optional scheme, the rotating assembly comprises a gear arranged in the supporting plate, the gear is rotatably connected with the supporting plate through a rotating shaft, the gear is fixedly connected with the supporting rotating column through a connecting shaft, a rack is engagedly connected to the outer wall of the gear, the rack penetrates to the outside of one side of the supporting plate, and the rack is slidably connected with the supporting plate.

[0014] A guide assembly is arranged on the rack, and the guide assembly is used for moving and guiding the rack.

[0015] In an alternative: the guide assembly comprises: a connecting guide block fixedly connected to the bottom end of the rack, an outer wall of the connecting guide block is sleeved with a fixed guide plate, the fixed guide plate is located between the rack and the movable sliding table, the fixed guide plate is fixedly connected with two fixed support plates, a guide inclined slot is formed at the position where the fixed guide plate is connected with the connecting guide block, a limiting guide slot is formed at the end of the fixed guide plate away from the connecting guide block, the inner cavities of the guide inclined slot and the limiting guide slot are mutually penetrated, and the limiting guide slot and the guide inclined slot are both in sliding connection with the connecting guide block.

[0016] The pressing assembly is arranged on the mechanical sensor.

[0017] In an alternative: the pressing assembly comprises: a fixed pressing plate arranged at the end of the mechanical sensor away from the flange plate, the fixed pressing plate is in sliding connection with the supporting cylinder, and a limiting push rod is fixedly connected to the end of the fixed pressing plate away from the mechanical sensor.

[0018] The displacement assembly is arranged on the limiting push rod.

[0019] In an alternative: the displacement assembly comprises: a connecting push cylinder which is sleeved on the outer wall of the limiting push rod, the connecting push cylinder penetrates to the outside of the end of the supporting cylinder away from the flange plate, the connecting push cylinder is in sliding connection with the supporting cylinder, a connecting push plate is fixedly connected to the end of the connecting push cylinder away from the limiting push rod, and a movable pressing roller is rotatably connected to the end of the connecting push plate away from the connecting push cylinder through a rotating shaft.

[0020] The reset assembly is arranged on the limiting push rod.

[0021] In an alternative: the reset assembly is a spring which is sleeved on the outer wall of the limiting push rod, one end of the spring is in contact with the outer wall of the connecting push cylinder, and the other end of the spring is in contact with the outer wall of the fixed pressing plate.

[0022] The limiting assembly is arranged on the connecting push cylinder.

[0023] In an alternative: the limiting assembly comprises: two connecting sliding plates which are fixedly connected to the outer wall of the connecting push cylinder in symmetry, the two connecting sliding plates penetrate to the outside of the two sides of the supporting cylinder respectively, the two connecting sliding plates are both in sliding connection with the supporting cylinder, limiting push plates are fixedly connected to the sides of the two connecting sliding plates away from the connecting push cylinder, the limiting push plates are located on the outer side of the supporting cylinder, and the limiting push plates are fixedly connected with the connecting push plate.

[0024] Compared with the prior art, the utility model has the advantages that:

[0025] The utility model discloses a detection mechanism can drive the limit cylinder, the displacement of mechanics sensor through the flange plate simultaneously, drive mechanics sensor to rotate, thereby can automatically contact with the outer wall of different model reinforcing bars, and along with the displacement of mechanics sensor, can through the electricity signal of production of deformation, by wire to data terminal transmission, thereby can realize the purpose of automatic detection to different model reinforcing bars. BRIEF DESCRIPTION OF DRAWINGS

[0026] Fig. 1 It is the structural diagram of the utility model.

[0027] Fig. 2 It is the internal structure diagram of the utility model's support plate.

[0028] Fig. 3 It is the detection mechanism structure diagram of the utility model.

[0029] Fig. 4 It is the limit cylinder and mechanics sensor explosion structure diagram of the utility model.

[0030] Figure mark annotation: 1, bottom plate;201, support cylinder;202, support rotating column;203, spring;204, limit pushboard;205, connect push cylinder;206, connect pushboard;207, remove pressure roll;208, fixed guide plate;209, limit guide groove;2010, guide inclined slot;2011, connect guide block;2012, rack;2013, gear;2014, support plate;2015, limit pushrod;2016, fixed pressure plate;2017, connect sliding plate;2018, remove sliding table;2019, limit sliding rod;2020, screw;2021, motor;2022, fixed support plate;3, clamping assembly;4, limit cylinder;5, flange plate;6, mechanics sensor. DETAILED DESCRIPTION

[0031] In order to make the utility model's purpose, technical scheme and advantage more clearly clear, following combining with the drawings and example, this utility model carries out further detailed explanation.

[0032] In one embodiment, as Figs. 1-4As shown, a steel deformation measuring device, including a base plate 1, the top end of the base plate 1 is symmetrically provided with two clamping assemblies 3 for clamping and fixing the end of the steel, a flange plate 5 is arranged above the base plate 1, the flange plate 5 is located on one side of a clamping assembly 3, one end of the flange plate 5 is integrally formed with a limiting cylinder 4, the inside of the limiting cylinder 4 is provided with a mechanical sensor 6, the limiting cylinder 4 is threadedly connected with the mechanical sensor 6, the mechanical sensor 6 penetrates to the outside of the end of the flange plate 5 away from the limiting cylinder 4, the mechanical sensor 6 is electrically connected with a data terminal through a wire, and the limiting cylinder 4 is provided with an opening for the wire to penetrate at the position where the limiting cylinder 4 is connected with the wire, and a detection mechanism for driving the mechanical sensor 6 to measure the steel is arranged on the base plate 1;

[0033] The detection mechanism comprises: two fixed supporting plates 2022 symmetrically and fixedly connected to the top end of the base plate 1, the two fixed supporting plates 2022 are located on one side of the two clamping assemblies 3 respectively, one fixed supporting plate 2022 is provided with a motor 2021 at the end away from the other fixed supporting plate 2022, the output end of the motor 2021 is fixedly connected with a lead screw 2020, the lead screw 2020 is located between the two fixed supporting plates 2022, the lead screw 2020 is rotatably connected with the other fixed supporting plate 2022 through a rotating shaft, the outer side of the lead screw 2020 is symmetrically provided with two limiting sliding rods 2019, the two limiting sliding rods 2019 are fixedly connected with the two fixed supporting plates 2022 respectively, and a movable sliding table 2018 is slidably sleeved on the outer wall of the lead screw 2020;

[0034] In this embodiment, when in use, the two ends of the steel are clamped and fixed by the two clamping assemblies 3, then the motor 2021 is started to drive the lead screw 2020 to rotate, at this time, the movable sliding table 2018 is driven to slide along the outer wall of the two limiting sliding rods 2019 under the thread of the lead screw 2020, so that the detection mechanism can drive the flange plate 5 to displace;

[0035] In this process, the detection mechanism can drive the limiting cylinder 4 and the mechanical sensor 6 to move through the flange plate 5, and at the same time, the detection mechanism can exert pressure on the end face of the mechanical sensor 6 through the block of the outer wall of the steel;

[0036] When the detection mechanism stops driving the mechanical sensor 6 to move, at this time, the mechanical sensor 6 is started, and the motor 2021 continues to drive the lead screw 2020 to rotate, so that the movable sliding table 2018 continues to displace, in this process, the detection mechanism can drive the mechanical sensor 6 to transmit the electric signal generated by the deformation to the data terminal through the wire, so as to automatically detect different types of steels;

[0037] In one embodiment, as Figs. 1-3As shown, the detection mechanism further comprises a support assembly arranged at the top end of the moving slide 2018;

[0038] The support assembly comprises a support plate 2014 fixedly connected to the top end of the moving slide 2018, the upper surface of the support plate 2014 is provided with a support rotating column 202, the top end of the support rotating column 202 is fixedly connected with a support cylinder 201, the support cylinder 201 is fixedly connected with the flange plate 5 through bolts, and the mechanical sensor 6 is located on the inner side of the support cylinder 201;

[0039] A rotating assembly is arranged on the support plate 2014, and the rotating assembly is used to drive the support rotating column 202 to rotate;

[0040] The rotating assembly comprises a gear 2013 arranged in the support plate 2014, the gear 2013 is rotatably connected with the support plate 2014 through a rotating shaft, the gear 2013 is fixedly connected with the support rotating column 202 through a connecting shaft, the outer wall of the gear 2013 is meshingly connected with a rack 2012, the rack 2012 penetrates to the outside of one side of the support plate 2014, and the rack 2012 is slidably connected with the support plate 2014;

[0041] A guide assembly is arranged on the rack 2012, and the guide assembly is used to move and guide the rack 2012;

[0042] The guide assembly comprises a connecting guide block 2011 fixedly connected to the bottom end of the rack 2012, the outer wall of the connecting guide block 2011 is sleeved with a fixed guide plate 208, the fixed guide plate 208 is located between the rack 2012 and the moving slide 2018, the fixed guide plate 208 is fixedly connected with two fixed support plates 2022, a guide inclined groove 2010 is formed at the position where the fixed guide plate 208 is connected with the connecting guide block 2011, a limiting guide groove 209 is formed at the end portion of the fixed guide plate 208 away from the connecting guide block 2011, the inner cavities of the guide inclined groove 2010 and the limiting guide groove 209 are mutually penetrated, and the limiting guide groove 209 and the guide inclined groove 2010 are slidably connected with the connecting guide block 2011. Through the cooperation of the support assembly, the rotating assembly and the guide assembly, the support rotating column 202 can drive the mechanical sensor 6 to displace in the moving process;

[0043] A pressing assembly is arranged on the mechanical sensor 6;

[0044] In one embodiment, as shown in the drawings, Figs. 2-3 The pressing assembly comprises a fixed pressing plate 2016 arranged at the end portion of the mechanical sensor 6 away from the flange plate 5, the fixed pressing plate 2016 is slidably connected with the support cylinder 201, and a limiting push rod 2015 is fixedly connected to the end of the fixed pressing plate 2016 away from the mechanical sensor 6;

[0045] The displacement assembly is arranged on the limiting push rod 2015.

[0046] The displacement assembly comprises a connecting push cylinder 205 which is sleeved on the outer wall of the limiting push rod 2015 and penetrates to the outer side of the supporting cylinder 201 away from the flange 5, the connecting push cylinder 205 is in sliding connection with the supporting cylinder 201, the end of the connecting push cylinder 205 away from the limiting push rod 2015 is fixedly connected with a connecting push plate 206, and the end of the connecting push plate 206 away from the connecting push cylinder 205 is rotationally connected with a moving pressure roller 207 through a rotating shaft.

[0047] The limiting push rod 2015 is provided with a reset assembly.

[0048] The reset assembly is a spring 203 which is sleeved on the outer wall of the limiting push rod 2015, one end of the spring 203 is in contact with the outer wall of the connecting push cylinder 205, and the other end of the spring 203 is in contact with the outer wall of the fixed pressing plate 2016.

[0049] The connecting push cylinder 205 is provided with a limiting assembly.

[0050] In one embodiment, as shown in Figs. 1-3 The limiting assembly comprises two connecting sliding plates 2017 which are symmetrically fixedly connected to the outer wall of the connecting push cylinder 205, the two connecting sliding plates 2017 penetrate to the outer sides of the supporting cylinder 201 respectively, the two connecting sliding plates 2017 are in sliding connection with the supporting cylinder 201, the side of the two connecting sliding plates 2017 away from the connecting push cylinder 205 is fixedly connected with a limiting push plate 204, the limiting push plate 204 is located on the outer side of the supporting cylinder 201, the limiting push plate 204 is fixedly connected with the connecting push plate 206, and the supporting cylinder 201 is provided with a straight sliding groove at the position where the supporting cylinder 201 is in contact with the connecting sliding plate 2017, the straight sliding groove is used for sliding of the connecting sliding plate 2017.

[0051] The above embodiment discloses a reinforcing steel bar deformation measuring device, wherein, when in use, the two ends of the reinforcing steel bar are clamped and fixed by the two clamping assemblies 3, then the motor 2021 is started to drive the screw rod 2020 to rotate, at this time, the moving sliding table 2018 slides along the outer walls of the two limiting sliding rods 2019 under the thread of the screw rod 2020, and the supporting column 202 is driven by the supporting plate 2014 to drive the flange 5 to displace under the driving of the moving sliding table 2018.

[0052] In the process, the rack 2012 is driven by the support plate 2014, and the connecting guide block 2011 is driven to slide along the inner wall of the guide chute 2010. At this time, the rack 2012 is driven by the connecting guide block 2011 to slide along the inner wall of the support plate 2014. At the same time, the gear 2013 is driven by the rack 2012 to rotate the support rotating column 202 through the connecting shaft. At this time, the support cylinder 201 is driven by the support rotating column 202 to move the moving pressure roller 207 through the limiting push plate 204, the connecting push cylinder 205, and the connecting push plate 206.

[0053] When the moving pressure roller 207 contacts the outer wall of the steel bar, the moving pressure roller 207 is blocked by the steel bar, and the limiting push plate 204 and the connecting push cylinder 205 are pushed synchronously by the connecting push plate 206. At this time, the connecting sliding plate 2017 is driven by the limiting push plate 204 and the connecting push cylinder 205 to slide along the inner wall of the straight sliding groove. At the same time, the connecting push cylinder 205 slides along the inner wall of the support cylinder 201 and the outer wall of the limiting push rod 2015 by moving, and the spring 203 is compressed. At this time, the spring 203 exerts pressure on the end face of the fixed pressure plate 2016 by rebounding, and the fixed pressure plate 2016 slides along the inner wall of the support cylinder 201 by the pushing of the spring 203, and exerts pressure on the end face of the mechanical sensor 6. Until the connecting guide block 2011 contacts the inner wall of the limiting guide groove 209, the moving pressure roller 207 can contact the outer wall of the steel bar of different models.

[0054] After the mechanical sensor 6 is started, the lead screw 2020 is continuously driven to rotate by the motor 2021, so that the moving sliding table 2018 continues to displace. In the process, the spring 203 pushes the connecting push cylinder 205 to displace along the inner wall of the support cylinder 201 by rebounding. At the same time, the limiting push plate 204 pushes the moving pressure roller 207 through the connecting push plate 206 by the driving of the connecting push cylinder 205 through the connecting sliding plate 2017, so that the moving pressure roller 207 is always tightly attached to the outer wall of the steel bar. At this time, the mechanical sensor 6 is compressed by the fixed pressure plate 2016, and the electrical signal generated by the deformation is transmitted to the data terminal through the wire, so that the steel bars of different models can be automatically detected.

[0055] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A steel bar deformation measuring device, comprising a base plate (1), two clamping assemblies (3) for clamping and fixing the end of the steel bar are symmetrically installed at the top end of the base plate (1), a flange plate (5) is arranged above the base plate (1), the flange plate (5) is located on one side of a clamping assembly (3), a limiting cylinder (4) is integrally formed at one end of the flange plate (5), a mechanical sensor (6) is arranged in the limiting cylinder (4), the limiting cylinder (4) is threadedly connected with the mechanical sensor (6), and the mechanical sensor (6) penetrates to the outside of the end of the flange plate (5) away from the limiting cylinder (4), characterized in that, The bottom plate (1) is provided with a detection mechanism for driving the dynamic sensor (6) to measure the steel bar; The detection mechanism comprises two fixed supporting plates (2022) symmetrically and fixedly connected at the top end of the bottom plate (1), the two fixed supporting plates (2022) are located on one side of the two clamping assemblies (3) respectively, one end of the fixed supporting plate (2022) away from the other fixed supporting plate (2022) is provided with a motor (2021), the output end of the motor (2021) is fixedly connected with a lead screw (2020), the lead screw (2020) is located between the two fixed supporting plates (2022), the lead screw (2020) is rotatably connected with the other fixed supporting plate (2022) through a rotating shaft, the outer side of the lead screw (2020) is symmetrically provided with two limiting sliding rods (2019), the two limiting sliding rods (2019) are fixedly connected with the two fixed supporting plates (2022) respectively, the outer wall of the lead screw (2020) is slidably sleeved with a moving sliding table (2018), the moving sliding table (2018) is threadedly connected with the lead screw (2020), and the moving sliding table (2018) is slidably sleeved on the outer wall of the two limiting sliding rods (2019).

2. The device for measuring deformation of a steel bar according to claim 1, wherein The detection mechanism further comprises a supporting assembly arranged at the top end of the moving sliding table (2018); The supporting assembly comprises a supporting plate (2014) fixedly connected at the top end of the moving sliding table (2018), the upper surface of the supporting plate (2014) is provided with a supporting rotating column (202), the top end of the supporting rotating column (202) is fixedly connected with a supporting cylinder (201), the supporting cylinder (201) is fixedly connected with the flange plate (5) through bolts, and the dynamic sensor (6) is located on the inner side of the supporting cylinder (201); The supporting plate (2014) is provided with a rotating assembly, and the rotating assembly is used for driving the supporting rotating column (202) to rotate.

3. A device for measuring deformation of a steel bar according to claim 2, wherein The rotating assembly comprises a gear (2013) arranged in the supporting plate (2014), the gear (2013) is rotatably connected with the supporting plate (2014) through a rotating shaft, the gear (2013) is fixedly connected with the supporting rotating column (202) through a connecting shaft, the outer wall of the gear (2013) is engaged with a rack (2012), the rack (2012) penetrates to the outside of one side of the supporting plate (2014), and the rack (2012) is slidably connected with the supporting plate (2014); The rack (2012) is provided with a guide assembly, and the guide assembly is used for moving and guiding the rack (2012).

4. The device for measuring deformation of a steel bar according to claim 3, wherein The guide assembly comprises a connecting guide block (2011) fixedly connected to the bottom end of the rack (2012), an outer wall of the connecting guide block (2011) is sleeved with a fixed guide plate (208), the fixed guide plate (208) is located between the rack (2012) and the movable sliding table (2018), the fixed guide plate (208) is fixedly connected with two fixed support plates (2022), a guide inclined groove (2010) is formed at the position where the fixed guide plate (208) is connected with the connecting guide block (2011), a limiting guide groove (209) is formed at the end of the fixed guide plate (208) away from the connecting guide block (2011), the inner cavities of the guide inclined groove (2010) and the limiting guide groove (209) are mutually penetrated, and the limiting guide groove (209) and the guide inclined groove (2010) are both in sliding connection with the connecting guide block (2011). The pressing assembly is arranged on the mechanical sensor (6).

5. A device for measuring deformation of a steel bar according to claim 4, wherein The pressing assembly comprises a fixed pressing plate (2016) arranged at the end of the mechanical sensor (6) away from the flange plate (5), the fixed pressing plate (2016) is in sliding connection with the supporting cylinder (201), and the end of the fixed pressing plate (2016) away from the mechanical sensor (6) is fixedly connected with a limiting push rod (2015). A displacement assembly is arranged on the limiting push rod (2015).

6. A device for measuring deformation of a steel bar according to claim 5, wherein The displacement assembly comprises a connecting push cylinder (205) which is sleeved on the outer wall of the limiting push rod (2015), the connecting push cylinder (205) penetrates to the outside of the end of the supporting cylinder (201) away from the flange plate (5), the connecting push cylinder (205) is in sliding connection with the supporting cylinder (201), the end of the connecting push cylinder (205) away from the limiting push rod (2015) is fixedly connected with a connecting push plate (206), and the end of the connecting push plate (206) away from the connecting push cylinder (205) is rotatably connected with a movable pressing roller (207) through a rotating shaft. A reset assembly is arranged on the limiting push rod (2015).

7. A device for measuring deformation of a steel bar according to claim 6, wherein The reset assembly is a spring (203) which is sleeved on the outer wall of the limiting push rod (2015), one end of the spring (203) is in contact with the outer wall of the connecting push cylinder (205), and the other end of the spring (203) is in contact with the outer wall of the fixed pressing plate (2016). A limiting assembly is arranged on the connecting push cylinder (205).

8. A device for measuring deformation of a steel bar according to claim 7, wherein The limiting assembly comprises two connecting sliding plates (2017) which are fixedly connected to the outer wall of the connecting push cylinder (205) in symmetry, the two connecting sliding plates (2017) penetrate to the outside of the two sides of the supporting cylinder (201) respectively, the two connecting sliding plates (2017) are both in sliding connection with the supporting cylinder (201), the side of the two connecting sliding plates (2017) away from the connecting push cylinder (205) is fixedly connected with a limiting push plate (204), the limiting push plate (204) is located on the outside of the supporting cylinder (201), and the limiting push plate (204) is fixedly connected with the connecting push plate (206).

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