A height difference measuring device

Abstract

The present application discloses a height difference measuring device, which belongs to the technical field of measuring devices. The present application includes a fixedly connected measuring piece and a connecting rod, and a reference plane, a first mark and a second mark are provided on the measuring piece. When measuring the reverse height difference between the loop skirt and the finishing mill outlet transition plate, the operator holds the connecting rod, places the measuring piece on the loop skirt, and makes the reference plane of the measuring piece flush with the upper end surface of the loop skirt, and observes whether the finishing mill outlet transition plate is located between the first mark and the second mark, so as to judge whether the height difference between the loop skirt and the finishing mill outlet transition plate meets the requirements. The height difference measuring device of the present application reduces the risk of workers being scalded by the loop skirt or the outlet transition plate to a certain extent; the operator only needs to stand at a distance to observe whether the finishing mill outlet transition plate is located between the first mark and the second mark bracket, which is convenient for measurement and does not require precise readings, which helps to improve detection efficiency.

Description

Technical Field

[0001] The present application belongs to the technical field of measuring devices, and in particular, relates to a height difference measuring device. Background Art

[0002] In order to ensure the normal operation of the hot rolling finishing mill, the hot rolling finishing mill requires measuring the reverse height difference between the 1-6 looper skirts and the finishing mill outlet transition plate at least once a week, and each measurement is carried out just after the rolling is stopped. The height difference between the 1-6 looper skirts and the finishing mill outlet transition plate of the hot rolling finishing mill is generally required to be within the range of 5-15mm.

[0003] In the related art, when the height difference needs to be measured, the staff needs to squat on the transition plate and hold a square ruler to measure. Each measurement is carried out just after the rolling is stopped. At this time, the loop skirt plate and the transition plate at the outlet of the finishing mill are very red hot. The temperature is high. The operator squats on the transition plate to measure, which is very likely to cause burns to the staff. Utility Model Content

[0004] The present application aims to at least to some extent solve the technical problem in the related art that the reverse height difference measurement between the looper skirt plate and the finishing mill outlet transition plate is inconvenient and easy to cause burns. To this end, the present application provides a height difference measurement device.

[0005] An embodiment of the present application provides a height difference measuring device for measuring the height difference between a loop skirt and an outlet transition plate of a finishing mill, comprising: a measuring piece and a connecting rod, wherein the measuring piece and the connecting rod are fixedly connected; the measuring piece is provided with a reference plane for positioning with the upper end surface of the loop skirt; along the height direction of the measuring piece, the measuring piece is further provided with a first mark and a second mark, the height of the first mark from the reference plane being the same as the minimum height difference between the loop skirt and the outlet transition plate, and the height of the second mark from the reference plane being the same as the maximum height difference between the loop skirt and the outlet transition plate.

[0006] In some embodiments, the first mark and the second mark are both planar and parallel to the reference plane.

[0007] In some embodiments, along one side of the length direction of the measuring piece, the measuring piece is in a stepped shape, and the reference plane, the first mark and the second mark are stepped planes.

[0008] In some embodiments, four steps are provided on the measuring piece, namely a first step, a second step, a third step and a fourth step arranged in sequence, the lower end surface of the first step is a reference plane, the upper end surface of the first step is the first mark, and the upper end surface of the third step is the second mark.

[0009] In some embodiments, along the height direction of the measuring member, the distances from the upper end surface of the second step to the upper end surfaces of the first step and the third step are consistent.

[0010] In some embodiments, the height of the first mark from the reference plane is 5 mm, and the height of the second mark from the reference plane is 15 mm.

[0011] In some embodiments, the measuring member and the connecting rod are detachably connected.

[0012] In some embodiments, an external thread is provided at one end of the connecting rod close to the measuring piece, a through hole is provided on the measuring piece, and the height difference measuring device also includes two nuts. The connecting rod passes through the measuring piece through the through hole, and the nuts are located on both sides of the measuring piece and are threadedly connected to the connecting rod.

[0013] In some embodiments, the connecting rod is a telescopic rod.

[0014] In some embodiments, the length of the connecting rod is 1500-2000 mm.

[0015] The utility model has at least the following beneficial effects:

[0016] The height difference measuring device of the present application includes a fixedly connected measuring piece and a connecting rod, and a reference plane, a first mark and a second mark are arranged on the measuring piece. When it is necessary to measure the reverse height difference between the loop skirt and the finishing mill outlet transition plate, the operator holds the connecting rod, places the measuring piece on the loop skirt, and makes the reference plane of the measuring piece flush with the upper end surface of the loop skirt, and then observes whether the finishing mill outlet transition plate is located between the first mark and the second mark, so as to judge whether the height difference between the loop skirt and the finishing mill outlet transition plate meets the requirements. After the present application is designed in this way, when measuring the height difference, the operator stays away from the loop skirt and the finishing mill outlet transition plate, and does not need to stand on the loop skirt, which reduces the risk of the staff being scalded by the loop skirt or the outlet transition plate to a certain extent; at the same time, after the present application is designed in this way, the operator can stand at a distance to observe whether the finishing mill outlet transition plate is located between the first mark and the second mark bracket, which is more intuitive and convenient to measure, and does not need to read accurately, which helps to improve the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 The side view structure diagram of the height measuring device in one or more embodiments of the present application is shown. Figure 1 .

[0019] Figure 2 The side view structure diagram of the height measuring device in one or more embodiments of the present application is shown. Figure 2 .

[0020] Figure 3 The side view structure diagram of the height measuring device in one or more embodiments of the present application is shown. Figure 3 .

[0021] Figure 4 The side view structure diagram of the height measuring device in one or more embodiments of the present application is shown. Figure 4 .

[0022] Figure 5 The side view structure diagram of the height measuring device in one or more embodiments of the present application is shown. Figure 5 .

[0023] Figure 6 The side view structure diagram of the height measuring device in one or more embodiments of the present application is shown. Figure 6 .

[0024] Figure 7 A front view structural schematic diagram of a height measuring device in one or more embodiments of the present application is shown.

[0025] Figure 8 A schematic structural diagram of a loop skirt plate and an outlet transition plate is shown.

[0026] Fig. 9 Shows Figure 2 Schematic diagram of the height measuring device shown in use.

[0027] Figure markings: 100 - height difference measuring device, 110 - measuring piece, 110a - reference plane, 110b - first mark, 110c - second mark, 111 - first step, 112 - second step, 113 - third step, 114 - fourth step, 120 - connecting rod, 130 - nut, 200 - loop skirt, 300 - outlet transition plate. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0030] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0032] In order to ensure the normal operation of the hot rolling mill, the hot rolling mill is required to measure the reverse height difference between the 1-6 loop skirts and the finishing mill outlet transition plate at least once a week, and each measurement is carried out just after the rolling is stopped. The height difference between the 1-6 loop skirts and the finishing mill outlet transition plate of the hot rolling mill is generally required to be within the range of 5-15mm. Figure 8 As shown, a schematic diagram of the structure of the loop skirt plate and the finishing mill outlet transition plate is shown, and H in the figure represents the height difference between the loop skirt plate and the finishing mill outlet transition plate.

[0033] In the related art, when the height difference needs to be measured, due to limited space, the staff needs to squat on the transition plate and hold a square ruler to measure. Each measurement is carried out just after the rolling is stopped. At this time, the loop skirt plate and the transition plate at the outlet of the finishing mill are very red hot. The temperature is high. The operator squats on the transition plate to measure, which is very likely to cause burns to the staff.

[0034] At the same time, in the related technology, since a triangle ruler is used for measurement, the operator must lie down and look at the specific scale of the outlet transition plate alignment before making a judgment. This method increases the difficulty of measurement and low measurement efficiency.

[0035] Therefore, in the related art, when measuring the reverse height difference between the looper skirt plate and the finishing mill exit transition plate, there is a technical problem that the measurement is inconvenient and easily causes burns. The embodiment of the present application provides a height difference measurement device, which can at least solve the above technical problems to a certain extent.

[0036] The present application is described below with reference to the accompanying drawings and specific embodiments:

[0037] The embodiment of the present application provides a height difference measuring device 100, which can remotely measure whether the reverse height difference between the loop skirt plate 200 and the finishing mill exit transition plate 300 meets the required range.

[0038] It should be noted that the height difference between the looper skirt plate 200 and the finishing mill outlet transition plate 300 does not need to be measured to obtain a specific height difference value, but only needs to determine whether the height difference is within the required range.

[0039] like Figure 1 As shown, the height difference measuring device 100 of the present application is used to measure the height difference between the loop skirt 200 and the outlet transition plate 300 of the finishing mill, and includes a measuring piece 110 and a connecting rod 120. The measuring piece 110 and the connecting rod 120 are fixedly connected so that an operator can hold the connecting rod 120, stand at a distance, and move the measuring piece 110 to the upper end surface of the loop skirt 200 to achieve remote measurement.

[0040] The measuring piece 110 is provided with a reference plane 110 a for positioning with the upper end surface of the loop skirt 200 . During measurement, the reference plane 110 a of the measuring piece 110 fits with the upper end surface of the loop skirt 200 .

[0041] Along the height direction of the measuring piece 110, the measuring piece 110 is further provided with a first mark 110b and a second mark 110c. The height of the first mark 110b from the reference plane 110a is the same as the minimum height difference between the loop skirt 200 and the outlet transition plate 300, and the height of the second mark 110c from the reference plane 110a is the same as the maximum height difference between the loop skirt 200 and the outlet transition plate 300.

[0042] Since the height of the first mark 110b from the reference plane 110a is the same as the minimum height difference between the loop skirt 200 and the outlet transition plate 300, and the height of the second mark 110c from the reference plane 110a is the same as the maximum height difference between the loop skirt 200 and the outlet transition plate 300, when the reference plane 110a of the measuring piece 110 and the upper end surface of the loop skirt 200 are fitted, if the port of the outlet transition plate 300 is located between the first mark 110b and the second mark 110c, it means that the height difference between the loop skirt 200 and the outlet transition plate 300 meets the required range; if the port of the outlet transition plate 300 is not located between the first mark 110b and the second mark 110c, it means that the height difference between the loop skirt 200 and the outlet transition plate 300 is too large or too small and does not meet the required range, and the operator needs to make adjustments. Specifically, if the port of the outlet transition plate 300 is located below the first mark 110b, it means that the height difference between the loop skirt plate 200 and the outlet transition plate 300 is too small; if the port of the outlet transition plate 300 is located above the second mark 110c, it means that the height difference between the loop skirt plate 200 and the outlet transition plate 300 is too large.

[0043] After the application is designed in this way, when using the application, the operator holds the connecting rod 120 to place the measuring piece 110 on the loop skirt 200, and then observes whether the position of the outlet transition plate 300 is between the first mark 110b and the second mark 110c, and can quickly determine whether the height difference between the loop skirt 200 and the outlet transition plate 300 meets the required range, which greatly saves manpower and helps to improve the detection efficiency. At the same time, after the application is designed in this way, the operator can measure away from the loop skirt 200 and the outlet transition plate 300 of the finishing mill, and the operator does not need to stand on the loop skirt 200, which reduces the risk of the staff being scalded by the loop skirt 200 and the outlet transition plate 300 to a certain extent, and ensures the safety of the operator.

[0044] The types of the first mark 110b and the second mark 110c are various, and may be scale lines, ridges, grooves, etc., which are not limited in this application. For easy observation, the scale lines, ridges, grooves, etc. may be colored, such as red, yellow, or other eye-catching colors.

[0045] In order to facilitate observation of the first mark 110b and the second mark 110c, in some embodiments of the present application, such as Figures 1 to 6 As shown, the first mark 110b and the second mark 110c are both planes and parallel to the reference plane 110a. Designing the first mark 110b and the second mark 110c as planes can facilitate operators to observe the first mark 110b and the second mark 110c from a distance, which is convenient for the use of the height difference measurement device 100 of the present application.

[0046] The plane may be formed by slotting the measuring member 110, such as Figure 5 As shown, in some embodiments, a rectangular groove is provided on the measuring member 110 , the lower end surface of the rectangular groove is a first mark 110 b , and the upper end surface of the rectangular groove is a second mark 110 c .

[0047] The plane may also be formed by providing a protrusion on the measuring member 110, such as Figure 6 As shown, in some embodiments, a rectangular protrusion is provided on the measuring member 110, the upper end surface of the rectangular protrusion is the second mark 110c, and the lower end surface of the rectangular protrusion is the first mark 110b.

[0048] The plane can also be formed by steps, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in some embodiments, along one side of the length direction of the measuring member 110, the measuring member 110 is in a stepped shape, and the reference plane 110a, the first mark 110b and the second mark 110c are step planes; that is, one side of the measuring member 110 is in a stepped shape, and the reference plane 110a, the first mark 110b and the second mark 110c are step planes of these steps respectively; in some embodiments, three steps are provided, such as Figure 3 and Figure 4 As shown, from bottom to top they are the first step, the second step and the third step, the lower end surface of the first step is the reference plane 110a, the upper end surface of the first step is the first mark 110b, and the upper end surface of the second step 112 is the second mark 110c.

[0049] The step shape can be an upright step shape, such as Figure 1 and Figure 4 As shown, the stepped shape can also be inverted, such as Figure 2 and Figure 3 It is not limited in this application.

[0050] like Figure 1 and Figure 2As shown, in some embodiments, the measuring piece 110 is provided with four steps, namely, the first step 111, the second step 112, the third step 113 and the fourth step 114, which are arranged in sequence. The lower end surface of the first step 111 is the reference plane 110a, the upper end surface of the first step 111 is the first mark 110b, and the upper end surface of the third step 113 is the second mark 110c. With this design, after the measuring personnel hold the connecting rod 120 and place the measuring piece 110 on the loop skirt 200, they apply force to make the measuring piece 110 move toward the outlet transition plate 300 and abut against the outlet transition plate 300. After abutment: if the outlet transition plate 300 is aligned with the first step 111, that is, it is located between the upper end surface and the lower end surface of the first step 111, it means that the height difference between the loop skirt 200 and the outlet transition plate 300 is small and does not meet the required range; if the outlet transition plate 300 is not ... 0 is aligned with the second step 112 or the third step 113, that is, it is located between the upper end surface of the first step 111 and the upper end surface of the third step 113, then it means that the height difference between the loop skirt 200 and the outlet transition plate 300 meets the requirement; if the outlet transition plate 300 is aligned with the fourth step 114, that is, it is located between the upper end surface of the fourth step 114 and the upper end surface of the third step 113, then it means that the height difference between the loop skirt 200 and the outlet transition plate 300 is large and does not meet the required range. After such design, there are the second step 112 and the third step 113 between the first mark 110b and the second mark 110c, and it can be observed that the outlet transition plate 300 is specifically aligned with the second step 112 or the third step 113, and the height difference range between the loop skirt 200 and the outlet transition plate 300 is roughly known, which further facilitates the use of the height measurement device of the present application. For example, if the required height difference range is 5-15mm, the spacing between the upper end surface of the first step 111 and the upper end surface of the first step 111 can be set to 5mm, the spacing between the upper end surface of the second step 112 and the upper end surface of the third step 113 can be set to 4mm, and the spacing between the upper end surface of the third step 113 and the upper end surface of the third step 113 can be set to 6mm. If the outlet transition plate 300 is aligned with the second step 112, it can be obtained that the height difference between the loop skirt plate 200 and the outlet transition plate 300 of the finishing mill is between 5-9mm. If the outlet transition plate 300 and the third step 113 are aligned, it can be obtained that the height difference between the loop skirt plate 200 and the outlet transition plate 300 of the finishing mill is between 9-15mm, so that the operator can more accurately obtain the height difference between the loop skirt plate 200 and the outlet transition plate 300, which is convenient for the use of this application.

[0051] In some embodiments, along the height direction of the measuring piece 110, the distances from the upper end surface of the second step 112 to the upper end surface of the first step 111 and the upper end surface of the third step 113 are consistent. That is, the distance between the upper end surface of the second step 112 and the upper end surface of the first step 111 is consistent with the distance between the upper end surface of the second step 112 and the upper end surface of the third step 113. Specifically, in some embodiments, the height difference between the looper skirt 200 and the exit transition plate 300 of the measuring finishing mill is in the range of 5-15mm, the distance from the upper end surface to the lower end surface of the first step 111 is 5mm, the distance from the upper end surface of the second step 112 to the upper end surface of the first step 111 is 5mm, and the distance from the upper end surface of the second step 112 to the upper end surface of the third step 113 is 5mm.

[0052] Typically, the height difference between the loop skirt 200 and the exit transition plate 300 of the finishing mill is measured in the range of 5-15 mm. Therefore, in some embodiments, in order to facilitate the use of the height difference measuring device 100 of the present application, the height from the first mark 110b to the reference plane 110a is 5 mm, and the height from the second mark 110c to the reference plane 110a is 15 mm.

[0053] In order to facilitate the storage of the height difference measuring device 100 of the present application, in some embodiments, the measuring piece 110 and the connecting rod 120 are detachably connected. When the height difference measuring device 100 of the present application needs to be used, the measuring piece 110 and the connecting rod 120 are connected together. When the height difference measuring device 100 of the present application is not used, the measuring piece 110 and the connecting rod 120 are disassembled for easy storage and reduced space occupation. There are various ways of detachable connection, which can be snap-on, adhesive, threaded connection, etc., which are not limited in the present application.

[0054] In order to facilitate the disassembly and installation of the connecting rod 120 and the measuring member 110, in some embodiments, as Figure 7 As shown, an end of the connecting rod 120 close to the measuring member 110 is provided with an external thread, and a through hole is provided on the measuring member 110. The height difference measuring device 100 further includes two nuts 130. The connecting rod 120 passes through the measuring member 110 through the through hole, and the nuts 130 are located on both sides of the measuring member 110 and are threadedly connected to the connecting rod 120. After such a design, the two nuts 130 are tightened so that the two nuts 130 clamp the measuring member 110 located between the two nuts 130, so that the connecting rod 120 and the measuring member 110 are fixedly connected. When the connecting rod 120 and the measuring member 110 need to be disassembled, any one of the nuts 130 can be disassembled to remove the measuring member 110.

[0055] In order to facilitate the use of the height difference measuring device 100 of the present application, in some embodiments, the connecting rod 120 is a telescopic rod. When measuring near, the connecting rod 120 is shortened, and when measuring far, the connecting rod 120 is lengthened. The structural form of the telescopic rod is various and is known to those skilled in the art, and will not be described in detail here.

[0056] To facilitate the use of the height difference measuring device 100 of the present application, in some embodiments, the length of the connecting rod 120 is 1500-2000 mm.

[0057] The method of using the height difference measuring device 100 of the present application is as follows: Fig. 9 As shown, when in use, the operator stands next to the looper on the operating side of the rolling mill, holds the end of the connecting rod 120 away from the measuring piece 110, then places the connecting rod 120 on the upper end surface of the looper skirt 200, and makes the reference plane 110a of the measuring piece 110 flush with the upper end surface of the looper skirt 200, then applies force to the connecting rod 120 to make the measuring piece 110 close to the outlet transition plate 300, then observes the alignment of the outlet transition plate 300 and the first step 111, the second step 112, the third step 113 and the fourth step 114. If the outlet transition plate 300 is aligned with the second step 112 or the third step 113, it means that the height difference between the looper skirt 200 and the outlet transition plate 300 meets the requirement.

[0058] In summary, the height difference measuring device 100 of the present application includes a fixedly connected measuring piece 110 and a connecting rod 120, and a reference plane 110a, a first mark 110b and a second mark 110c are provided on the measuring piece 110. When it is necessary to measure the reverse height difference between the loop skirt plate 200 and the finishing mill outlet transition plate 300, the operator holds the connecting rod 120, places the measuring piece 110 on the loop skirt plate 200, and makes the reference plane 110a of the measuring piece 110 flush with the upper end surface of the loop skirt plate 200, and then observes whether the finishing mill outlet transition plate 300 is located between the first mark 110b and the second mark 110c, so as to judge whether the height difference between the loop skirt plate 200 and the finishing mill outlet transition plate 300 meets the requirements. After the present application is designed in this way, when measuring the height difference, the operator stays away from the loop skirt 200 and the finishing mill outlet transition plate 300, and does not need to stand on the loop skirt 200, which reduces the risk of the operator being scalded by the loop skirt 200 or the outlet transition plate 300 to a certain extent; at the same time, after the present application is designed in this way, the operator only needs to stand at a distance to observe whether the finishing mill outlet transition plate 300 is located at the first mark 110b and the second mark 110c bracket, which is more intuitive and convenient to measure, does not require precise readings, and helps to improve detection efficiency.

[0059] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0060] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0061] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A height difference measuring device, characterized in that: The invention is used for measuring the height difference between a loop skirt (200) and an outlet transition plate (300) of a finishing mill, and comprises: a measuring piece (110) and a connecting rod (120), wherein the measuring piece (110) and the connecting rod (120) are fixedly connected; the measuring piece (110) is provided with a reference plane (110a) for positioning with the upper end surface of the loop skirt (200); along the height direction of the measuring piece (110), the measuring piece (110) is also provided with a first mark (110b) and a second mark (110c), wherein the height of the first mark (110b) from the reference plane (110a) is the same as the minimum height difference between the loop skirt (200) and the outlet transition plate (300), and the height of the second mark (110c) from the reference plane (110a) is the same as the maximum height difference between the loop skirt (200) and the outlet transition plate (300).

2. The height difference measuring device according to claim 1, characterized in that: The first mark (110b) and the second mark (110c) are both planes and parallel to the reference plane (110a).

3. The height difference measuring device according to claim 2, characterized in that: Along one side of the length direction of the measuring piece (110), the measuring piece (110) is in a stepped shape, and the reference plane (110a), the first mark (110b) and the second mark (110c) are stepped planes.

4. The height difference measuring device according to claim 3, characterized in that: The measuring member (110) is provided with four steps, namely a first step (111), a second step (112), a third step (113) and a fourth step (114) which are arranged in sequence, the lower end surface of the first step (111) being a reference plane (110a), the upper end surface of the first step (111) being the first mark (110b), and the upper end surface of the third step (113) being the second mark (110c).

5. The height difference measuring device according to claim 4, characterized in that: Along the height direction of the measuring member (110), the distances from the upper end surface of the second step (112) to the upper end surfaces of the first step (111) and the third step (113) are consistent.

6. The height difference measuring device according to any one of claims 1 to 5, characterized in that: The height from the first mark (110b) to the reference plane (110a) is 5 mm, and the height from the second mark (110c) to the reference plane (110a) is 15 mm.

7. The height difference measuring device according to any one of claims 1 to 5, characterized in that: The measuring member (110) and the connecting rod (120) are detachably connected.

8. The height difference measuring device according to claim 7, characterized in that: An external thread is provided at one end of the connecting rod (120) close to the measuring member (110), and a through hole is provided on the measuring member (110). The height difference measuring device (100) further comprises two nuts (130), and the connecting rod (120) passes through the measuring member (110) through the through hole. The nuts (130) are located on both sides of the measuring member (110) and are threadedly connected to the connecting rod (120).

9. The height difference measuring device according to any one of claims 1 to 5, characterized in that: The connecting rod (120) is a telescopic rod.

10. The height difference measuring device according to any one of claims 1 to 5, characterized in that: The length of the connecting rod (120) is 1500-2000 mm.

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