A retractable pulley and a retractable sliding assembly using the same

Abstract

The present application provides a retractable pulley and a retractable sliding assembly used therein, wherein the retractable pulley comprises: a main body, on which a spring hole is provided; a first spring, inserted into the spring hole and leaking out of the two ends of the main body; a pulley assembly, respectively mounted on the two ends of the first spring; a plug hole perpendicular to the axial direction of the spring hole is provided on the main body between two parallel spring holes, and a retractable sliding rod is mounted on the plug hole of the retractable pulley. The present application enables a deep soil (wall) horizontal displacement detection device to be tightly coupled to a standard inclinometer tube, can correspond to the deformation of the inclinometer tube, and avoid being stuck at the gap of the splicing of the inclinometer tube, thereby improving the applicability to extreme situations. In addition, an orthogonal axially slidable sliding assembly is provided, so that the deep soil (wall) horizontal displacement detection device is subjected to uniform force, and the posture change of the sliding assembly is consistent with the inclinometer tube, thereby ensuring the monitoring accuracy when soil (wall) displacement occurs in different directions.

Description

Technical Field

[0001] The present application relates to the field of deformation monitoring technology, and in particular to a retractable pulley applied to an inclinometer tube for monitoring horizontal displacement of deep soil (wall) bodies and a retractable sliding assembly applied thereto. Background Art

[0002] Inclinometer tubes usually used for the installation of deep soil (wall) horizontal displacement monitoring devices adopt national unified standard specifications. According to different depths, multiple such inclinometer tubes are connected in series for the deep soil (wall) horizontal displacement monitoring device to be inserted for monitoring.

[0003] At present, a group of orthogonal slide grooves are arranged on the inner wall of the inclinometer tube, and a sliding assembly is installed on the deep soil (wall) horizontal displacement monitoring device, so that when the deep soil (wall) horizontal displacement monitoring device is inserted into the gap of the inclinometer tube, the deep soil (wall) horizontal displacement monitoring device can be smoothly driven to the next inclinometer tube through the sliding assembly, thereby avoiding the deep soil (wall) horizontal displacement monitoring device from being stuck; however, due to the fear of the slot and the pulley falling off, the sliding speed is limited during manual measurement.

[0004] When installing a fixed inclinometer in an inclinometer tube, the measuring device needs to be fixed in the inclinometer tube for a long time; the use of pulleys of traditional movable inclinometers is inconvenient and complex in structure. It is a difficult problem to fix the fixed inclinometer tightly in the inclinometer tube while ensuring that it can adapt to the centimeter-level gap between the inclinometer tubes, ensure that the measuring device is tightly connected to the inclinometer tube, and be located on the axial center line of the inclinometer tube.

[0005] Most of the deep soil (wall) horizontal displacement monitoring devices are only equipped with a sliding component corresponding to one axis, which brings a problem that the deep soil (wall) horizontal displacement monitoring device is unevenly stressed in the four horizontal directions. Therefore, the monitoring accuracy when the soil displacement occurs in the direction corresponding to the axial direction of the sliding component is different from the monitoring accuracy when the soil displacement occurs in the vertical direction of the axial direction of the sliding component, which will cause the monitoring accuracy to be reduced or fail. Summary of the invention

[0006] In view of the shortcomings of the prior art described above, the purpose of the present application is to provide a retractable pulley and a retractable sliding assembly used therein, so as to solve the problem of poor applicability of the pulley assembly when installing a deep soil (wall) horizontal displacement monitoring device in an inclinometer tube in the prior art.

[0007] To achieve the above-mentioned purpose and other related purposes, the present application provides a retractable pulley, which includes: a main body, which is provided with a spring hole; a first spring, which is inserted into the spring hole and leaks out at both ends of the main body; and a pulley assembly, which is respectively installed at both ends of the first spring.

[0008] In one embodiment of the present application, the pulley assembly includes: a pulley bracket, the bottom of which is detachably connected to one end of the first spring; a pulley mounted on the pulley bracket; and a pulley shaft that passes through the center of the pulley and the mounting hole on the pulley bracket, respectively, so as to fix the pulley on the pulley bracket and enable the pulley to rotate.

[0009] In one embodiment of the present application, the retractable pulley includes: two fixed plates, respectively disposed on both sides of the main body; a slide groove is respectively disposed at both ends of each of the fixed plates; and the sliding distance of the pulley assembly relative to the main body is limited by inserting the pulley shaft into the slide groove.

[0010] In one embodiment of the present application, two spring holes parallel to each other are provided on the main body.

[0011] In one embodiment of the present application, a plug hole perpendicular to the axial direction of the spring hole is provided on the main body between the two parallel spring holes; the plug hole is used to install a retractable sliding member in the axial direction perpendicular to the spring hole.

[0012] To achieve the above-mentioned purpose and other related purposes, the present application provides a retractable sliding assembly, which includes: the retractable pulley as described above; a socket perpendicular to the axial direction of the spring hole and located between two parallel spring holes on the main body of the retractable pulley; and a retractable sliding rod installed in the socket of the retractable pulley.

[0013] In one embodiment of the present application, the retractable pulley and the retractable sliding rod have the same length in an unextended state or a natural state; and the sliding directions of the retractable pulley and the retractable sliding rod do not interfere with each other.

[0014] In one embodiment of the present application, the retractable sliding rod includes: a rod body, in which a second spring is disposed; a sliding unit, including a fixed portion and a sliding portion; the fixed portion is inserted into one end of the rod body and is detachably connected to one end of the second spring.

[0015] In one embodiment of the present application, the sliding portion is an arc-shaped structure.

[0016] In summary, the retractable pulley and the retractable sliding assembly used in the present application have the following beneficial effects:

[0017] The present application enables the deep soil (wall) horizontal displacement detection device to be tightly coupled to a standard inclinometer tube, can respond to the deformation of the inclinometer tube, and avoid being stuck at the gaps where the inclinometer tubes are spliced, thereby improving the applicability to extreme situations. In addition, an orthogonal axially slidable sliding component is provided, so that the deep soil (wall) horizontal displacement detection device is evenly stressed, and the posture change of the sliding component is consistent with the inclinometer tube, thereby ensuring the monitoring accuracy when soil (wall) displacement occurs in different directions. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Shown is a schematic structural diagram of a retractable pulley with a single spring in one embodiment of the present application.

[0019] Figure 2 Shown is a schematic structural diagram of a retractable pulley with double springs in one embodiment of the present application.

[0020] Figure 3 Shown is a schematic diagram of a scene of inclinometer casing installation in one embodiment of the present application.

[0021] Figure 4 It is a schematic structural diagram of a device for monitoring horizontal displacement of a deep soil (wall) body in which a retractable pulley is installed in one embodiment of the present application.

[0022] Figure 5 Shown is a schematic structural diagram of a retractable sliding rod in one embodiment of the present application.

[0023] Figure 6 Shown is a structural schematic diagram of a retractable sliding assembly in one embodiment of the present application. DETAILED DESCRIPTION

[0024] The following describes the embodiments of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. The present application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0025] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. Although the drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation, the type, quantity and proportion of each component in actual implementation may be changed arbitrarily, and the component layout may also be more complicated.

[0026] Throughout the specification, when a part is said to be "connected" to another part, this includes not only the case of "direct connection" but also the case of "indirect connection" by placing other elements therebetween. In addition, when a part is said to "include" a certain constituent element, unless otherwise stated, it does not exclude other constituent elements, but means that other constituent elements may be included.

[0027] The terms first, second and third are used to describe various parts, components, regions, layers and / or segments, but are not limited thereto. These terms are only used to distinguish a certain part, component, region, layer or segment from other parts, components, regions, layers or segments. Therefore, the first part, component, region, layer or segment described below may refer to the second part, component, region, layer or segment within the scope of this application.

[0028] Furthermore, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless there is an indication to the contrary in the context. It should be further understood that the terms "comprise", "include" indicate the presence of the described features, operations, elements, components, items, kinds, and / or groups, but do not exclude the presence, occurrence or addition of one or more other features, operations, elements, components, items, kinds, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, or mean any one or any combination. Therefore, "A, B or C" or "A, B and / or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B and C". Exceptions to this definition will only occur when the combination of elements, functions or operations is inherently mutually exclusive in some way.

[0029] Generally speaking, the deep soil (wall) horizontal displacement monitoring device is a circular tube or a square tube, and is divided into a sliding type or a fixed type. A plurality of fixed deep soil (wall) horizontal displacement monitoring devices can be spliced ​​together to monitor deformation at different depths. The retractable pulley or retractable slide rod or retractable sliding assembly described in the present application is installed in a single deep soil (wall) horizontal displacement monitoring device, preferably at the head and tail of the deep soil (wall) horizontal displacement monitoring device, or when multiple deep soil (wall) horizontal displacement monitoring devices are spliced ​​together, installed at the head of each deep soil (wall) horizontal displacement monitoring device, so that the installed retractable pulley or retractable slide rod or retractable sliding assembly can slide in the pre-set chute in the standard inclinometer tube, and can help the deep soil (wall) horizontal displacement monitoring device to smoothly pass through the gap between the inclinometer tubes, and synchronously realize the consistent deformation of the deep soil (wall) horizontal displacement monitoring device and the inclinometer tube.

[0030] like Figure 1, which is a schematic diagram of the structure of a retractable pulley with a single spring in an embodiment of the present application. As shown in the figure, the retractable pulley 100 includes: a main body 110, a first spring 120 and a pulley assembly 130.

[0031] In the present application, a spring hole 111 is provided on the main body 110 ; the spring hole 111 is preferably a horizontally penetrating hole, and its diameter is just suitable for receiving the first spring 120 .

[0032] Preferably, the present application does not limit the spring hole 111 to be only one, and two spring holes 111 parallel to each other may be provided, so that the connected pulley assembly 130 can be more stable when subjected to force, thereby preventing the pulley assembly 130 from deviating to one side.

[0033] In the present application, the first spring 120 is inserted into the spring hole 111 and leaks out from both ends of the main body 110 .

[0034] In one or more embodiments, the first spring 120 can also be connected to the pulley assembly 130 without leaking out of the two ends of the main body 110. In the present application, the first spring 120 is leaked out of the two ends of the main body 110 for the purpose of providing more deformation space for the first spring 120, thereby providing a larger range of motion for the pulley assembly 130 along the axial displacement of the first spring 120.

[0035] like Figure 2 As shown, a schematic diagram of the structure of a retractable pulley with two springs in an embodiment of the present application is shown. As shown in the figure, two spring holes 111 parallel to each other are provided on the main body 110. The provision of two spring holes 111 means that there are two first springs 120 connected to the pulley assembly 130, so that the stability between the pulley assembly 130 and the main body 110 is better when the pulley assembly 130 is subjected to force.

[0036] In the present application, the pulley assembly 130 is respectively installed at both ends of the first spring 120. The pulley assembly 130 includes:

[0037] The bottom of the pulley bracket 131 is detachably connected to one end of the first spring 120.

[0038] Preferably, the bottom thereof is provided with fixing columns which can be inserted into the first spring 120 at positions corresponding to the spring holes 111. For example, when the main body 110 is provided with one spring hole 111, the spring hole 111 is provided at a middle position of an axial direction of the main body 110, and correspondingly, a fixing column 134 corresponding to the position of the spring hole 111 is provided at the middle position of the bottom of the pulley bracket 131. When the main body 110 is provided with two spring holes 111, two fixing columns 134 corresponding to the positions of the spring holes 111 are provided at both sides of the bottom of the pulley bracket 131.

[0039] In addition, the fixing column 134 can be inserted into one end of the first spring 120 to achieve the connection between the pulley bracket 131 and the first spring 120 , and the fixing column 134 can be pulled out to achieve the disassembly of the pulley bracket 131 and the first spring 120 .

[0040] The pulley 132 is mounted on the pulley bracket 131. Preferably, the pulley bracket 131 is provided with two symmetrical brackets upward, and a pulley 132 can be vertically placed in the middle thereof.

[0041] The pulley shaft 133 passes through the center of the pulley 132 and the mounting hole 135 on the pulley bracket 131 respectively, so as to fix the pulley 132 on the pulley bracket 131 and enable the pulley 132 to rotate.

[0042] After the pulley is installed through the pulley shaft 133, the outer ring of the pulley 132 can be kept away from the pulley bracket 131, and the pulley 132 can be rotated under force. The pulley shaft 133 is also detachable, which is convenient for assembly or disassembly. Of course, after the assembly is completed, the two ends of the pulley shaft 133 can be bent to prevent the pulley shaft 133 from detaching.

[0043] It should be noted that the pulley sliding method of the present application has the advantage that: at the gap of the inclinometer tube 400, even if there is a slide groove that deviates from the inclinometer tube 400, it can still slide in the inclinometer tube 400. The sliding method of the pulley 132 has better applicability, and in the face of some extreme situations, it can also help the deep soil (wall) horizontal displacement monitoring device 300 to slide in the inclinometer tube 400.

[0044] like Figure 3As shown, it is a schematic diagram of the scene of the installation of the inclinometer tube in one embodiment of the present application. For example, the two vertically installed inclinometer tubes 400 are not accurately connected. If the deep soil (wall) horizontal displacement monitoring device 300 is placed directly in the inclinometer tube, it is very likely that the gap between the two inclinometer tubes 400 will interfere with the bottom of the inclinometer tube 400 located below, so that the deep soil (wall) horizontal displacement monitoring device 300 is stuck by the inclinometer tube 400 below. When the pulley-type retractable pulley 100 is installed at the lower part of the deep soil (wall) horizontal displacement monitoring device 300, since the outer ring of the pulley 132 is in a certain arc, its sliding front position can slide to a slightly higher platform or discontinuous plane in front, so that the sliding problem of the discontinuous plane or uneven plane appearing in the gap of the inclinometer tube 400 can be well solved, thereby helping the deep soil (wall) horizontal displacement monitoring device 300 to pass smoothly through the gap of the inclinometer tube 400.

[0045] In order to further ensure good stability between the pulley assemblies 130 and the main body 110 at both ends, the retractable pulley 100 includes: two fixing plates 140, which are respectively arranged on both sides of the main body 110, and the two ends of the fixing plates 140 are also respectively connected to the pulley assemblies 130. In this way, the pulley assembly 130 and the main body 110 can be kept from relative deviation or displacement (such as up and down movement) in the direction perpendicular to the axial direction of the main body 110.

[0046] Preferably, in order to limit the elastic displacement of the pulley assembly 130 relative to the main body 110 within a certain range, a slide groove 141 is provided at both ends of each fixed plate 140; by inserting the pulley shaft 133 into the slide groove 141, the sliding distance of the pulley assembly 130 relative to the main body 110 is limited.

[0047] In simple terms, when the first spring 120 is in a natural state or in an unstressed state, the distance between the pulley assemblies 130 at both ends is the maximum. If the first spring 120 is contracted under force, its deformation distance can be very large, but the present application does not require the first spring 120 to have too much deformation distance. Therefore, by providing a slide groove 141 on the fixed plate 140, the range of relative deformation of the first spring 120 can be limited, and the first spring 120 can also be limited to move only in the direction of the slide groove 141, further increasing the stability between the pulley assembly 130 and the main body 110 when under force.

[0048] In one embodiment of the present application, a plug hole 112 perpendicular to the axial direction of the spring hole 111 is provided on the main body 110 between the two parallel spring holes 111 ; the plug hole 112 is used to install a retractable sliding member in the axial direction perpendicular to the spring hole 111 .

[0049] It should be noted that, in addition to setting two parallel spring holes 111, the present application can further set a socket 112 so that another retractable sliding member can be installed in a direction perpendicular to the axis of the spring hole 111, so that the retractable pulley 100 can slide in four directions on the horizontal plane, so that the deep soil (wall) horizontal displacement monitoring device 300 is evenly stressed in the inclinometer tube 400, thereby increasing the monitoring accuracy of the fixed deep soil (wall) horizontal displacement monitoring device 300 for soil displacement in different directions.

[0050] For example, the retractable sliding member may be other existing sliding components, so that the retractable pulley 100 of the present application can be directly used in combination with the existing sliding components.

[0051] Preferably, the structure of the socket 112 may correspond to the rod structure of the telescopic sliding member to be installed. For example, when the rod 210 is a tubular or square tube, the socket 112 is a round hole, and the size of the socket 112 is also adapted to the thickness of the rod structure of the telescopic sliding member.

[0052] In another embodiment of the present application, the insertion hole 112 can be fixed to the deep soil (wall) horizontal displacement monitoring device 300 by inserting a fixing pin.

[0053] like Figure 4 As shown, it is a schematic diagram showing the structure of a retractable pulley installed in a deep soil (wall) horizontal displacement monitoring device in one embodiment of the present application. As shown in the figure, a deep soil (wall) horizontal displacement monitoring device 300 is connected to another deep soil (wall) horizontal displacement monitoring device 300 through a fixing member 310, and a deep soil (wall) horizontal displacement monitoring device 300 is provided at the end thereof as shown in the present application. Figure 1 The single-spring retractable pulley 100 is shown. Among them, the deep soil (wall) horizontal displacement monitoring device 300 is provided with slots on the upper and lower sides to allow the pulley 132 of the retractable pulley 100 to leak out. As shown in the figure, at this time, another sliding part is not installed in the socket 112 of the retractable pulley 100, so the retractable pulley 100 can be fixed by inserting the fixing pin 320. Correspondingly, the fixing part 310 used to connect the two deep soil (wall) horizontal displacement monitoring devices 300 is also provided with mounting holes corresponding to the position and size of the socket 112. It should also be noted that Figure 4 The fixing pin 320 is replaced with another retractable sliding member, that is, a schematic diagram of the installation of a double-spring retractable pulley 100 with another retractable sliding member.

[0054] In order to facilitate understanding of the structure of the retractable slide bar in the retractable slide assembly, the present application first describes in detail an embodiment of the retractable slide bar. However, it should be noted that the retractable slide bar is only one embodiment of the retractable slide member applicable to the retractable pulley 100, and the retractable slide assembly described in the present application is not limited to the structure of the retractable slide bar described in the present application.

[0055] like Figure 5 FIG. 2 is a schematic diagram showing the structure of a retractable sliding rod in an embodiment of the present application. As shown in the figure, the retractable sliding rod 200 includes:

[0056] The rod body 210 has a second spring 211 disposed therein; Figure 1 The main body 110 is greatly simplified, and in order to ensure stability with the sliding unit 220 , the second spring 211 does not leak out of the rod body 210 .

[0057] The sliding unit 220 includes a fixed portion 221 and a sliding portion 222; the fixed portion 221 is inserted from one end of the rod body 210 and is detachably connected to one end of the second spring 211; the sliding portion 222 is an arc-shaped structure. Figure 1 The pulley assembly 130 in the slide unit 220 is also greatly simplified, eliminating the pulley bracket 131 in the pulley assembly 130, and directly inserting the rod body 210 through the fixing portion 221 and connecting with the second spring 211. Of course, the slide portion 222 described in the present application can also be a pulley assembly.

[0058] In simple terms, compared to Figure 1 Compared with the retractable pulley 100 shown in the figure, the present application also provides a retractable sliding rod 200 with a different structure and a simpler structure. First, the rod body 210 is simplified to only place the second spring 211. Secondly, the sliding unit 220 is also greatly modified, from the pulley 132 to the sliding part 222 of the arc structure, and the sliding unit 220 is inserted into the rod body 210 by the fixing part 221 and connected to one end of the second spring 211.

[0059] In one embodiment of the present application, the fixing portion 221 is provided with a first sliding groove 223 along its axial direction, and the rod body 210 is provided with a first limiting hole ( Figure 5 wherein, by inserting the limiting pin 224 from the first limiting hole into the first sliding groove 223, the sliding distance of the sliding unit 220 relative to the rod body 210 can be limited.

[0060] In another embodiment of the present application, a second limiting hole is provided on the fixing portion 221, and a second sliding groove is provided on the rod body 210 at a position corresponding to the second limiting hole; wherein, by inserting the limiting pin 224 from the second sliding groove to the second limiting hole, the sliding distance of the sliding unit 220 relative to the rod body 210 can be limited.

[0061] In short, in this application, the combination of the limiting hole and the slide groove also imposes certain restrictions on the sliding of the sliding unit 220 relative to the rod body 210. In specific applications, the limiting hole and the slide groove are set to switch between the fixing portion 221 and the rod body 210. It should be noted that although the second limiting hole and the second slide groove are Figure 5 It is not shown in the figure, but the difference between it and the above-mentioned embodiment is only the replacement of the limiting hole and the sliding groove on the fixing part and the rod body, and the technical effect is the same, which can be easily thought of and realized by those skilled in the art.

[0062] In addition, it should be noted that, although compared with the sliding mode of the pulley, the sliding mode of the retractable slide rod 200 can only slide in the slide groove of the inclinometer tube 400, it can help the deep soil (wall) horizontal displacement monitoring device 300 to slide through the gap of the inclinometer tube 400, and its advantage is that the structure is simple and fewer parts.

[0063] like Figure 6 FIG. 1 is a schematic diagram showing the structure of a retractable sliding assembly in an embodiment of the present application. As shown in the figure, the retractable sliding assembly includes:

[0064] like Figure 1 The retractable pulley 100 shown in the figure; the main body 110 of the retractable pulley 100 is provided with an axial insertion hole 112 perpendicular to the spring hole 111 between two parallel spring holes 111; Figure 5 The telescopic sliding rod 200 is mounted on the insertion hole 112 of the telescopic pulley 100 .

[0065] In short, this application is based on Figure 1 The structure of the double spring hole 111 of the retractable pulley 100 shown in FIG. Figure 5 The telescopic sliding assembly formed by the combination of the telescopic sliding rod 200 shown in the figure has the advantage of providing a sliding scheme with uniform force on the horizontal plane, tightly fitting the deep soil (wall) horizontal displacement monitoring device in the inclinometer pipe slot, improving the measurement accuracy and reliability, and avoiding inaccurate or malfunction of a certain axial monitoring of the deep soil (wall) horizontal displacement monitoring device 300.

[0066] In the present application, the standard inclinometer tube 400 is suitable for a square tube or a round tube, and the retractable pulley 100 and the retractable slide rod 200 have the same length in an unextended state or a natural state. That is, no matter how the angle is changed, the retractable component of the present application can be adapted and installed in the inclinometer tube 400.

[0067] In addition, the retractable pulley 100 and the retractable sliding rod 200 do not interfere with each other in their sliding directions and can be deformed freely.

[0068] For example, if the retractable pulley 100 can slide in the up-down direction or the vertical direction, then the retractable slide bar 200 can also slide in the up-down direction or the vertical direction. In the slide groove of the inclinometer tube 400, the retractable pulley 100 can correspond to the first axial direction X, and the retractable slide bar 200 can correspond to the second axial direction Y, and the first axial direction X is perpendicular to the second axial direction Y on the horizontal plane.

[0069] In one or more embodiments, when assembling the retractable sliding assembly, the retractable pulley 100 is first installed, then the rod body 210 of the retractable sliding rod 200 is inserted, and then the sliding units 220 at both ends of the rod body 210 are installed.

[0070] In addition, when the retractable sliding assembly is installed in the inclinometer tube 400, the pulley 132 and the sliding part 222 of the retractable sliding assembly are first subjected to force to reduce their length and width. After the pulley 132 and the sliding part 222 of the retractable sliding assembly are aligned with the position of the slide groove in the inclinometer tube 400, the pulley 132 and the sliding part 222 of the retractable sliding assembly are released. Under the rebound force of the first spring 120 and the second spring 211, the pulley 132 of the retractable pulley 100 and the sliding unit 220 (sliding part 222) of the retractable sliding rod 200 are adapted and engaged in the slide groove, so as to facilitate the movement of the deep soil (wall) horizontal displacement monitoring device 300 in the inclinometer tube 400.

[0071] In summary, the retractable pulley and the retractable sliding assembly used in the present application can enable the deep soil (wall) horizontal displacement detection device to be tightly coupled to the standard inclinometer tube, can respond to the deformation of the inclinometer tube, and avoid being stuck in the gaps of the inclinometer tubes, thereby improving the applicability to extreme situations. In addition, an orthogonal axially slidable sliding assembly is provided, so that the deep soil (wall) horizontal displacement detection device is evenly stressed, and the posture change of the sliding assembly is consistent with the inclinometer tube, thereby ensuring the monitoring accuracy when soil (wall) displacement occurs in different directions.

[0072] The present invention effectively overcomes various shortcomings of the prior art and has high industrial utilization value.

[0073] The above embodiments are merely illustrative of the principles and effects of the present application and are not intended to limit the present application. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by those of ordinary skill in the art without departing from the spirit and technical ideas disclosed in the present application shall still be covered by the claims of the present application.

Claims

1. A retractable pulley installed in an inclinometer tube, characterized in that: The retractable pulley comprises: A main body, on which a spring hole is provided; A first spring is inserted into the spring hole and leaks out of two ends of the main body; Pulley assemblies, respectively mounted on both ends of the first spring; The pulley assembly comprises: a pulley bracket, the bottom of which is detachably connected to one end of the first spring; a pulley mounted on the pulley bracket; a pulley shaft passing through the center of the pulley and the mounting hole on the pulley bracket respectively, so as to fix the pulley on the pulley bracket and enable the pulley to rotate; The pulley bracket is provided with two symmetrical brackets upwards, and a pulley can be placed vertically in the middle; The retractable pulley comprises: two fixing plates, which are respectively arranged on both sides of the main body; two ends of each fixing plate are respectively provided with a slide groove; and the sliding distance of the pulley assembly relative to the main body is limited by inserting the pulley shaft into the slide groove.

2. The retractable pulley according to claim 1, characterized in that: The main body is provided with two spring holes which are parallel to each other.

3. The retractable pulley according to claim 2, characterized in that: An insertion hole perpendicular to the axial direction of the spring holes is provided on the main body between the two parallel spring holes; the insertion hole is used to install a telescopic sliding member in the axial direction perpendicular to the spring holes.

4. A retractable sliding assembly, characterized in that: The retractable sliding assembly comprises: The retractable pulley according to any one of claims 1 to 3; a plug hole perpendicular to the axial direction of the spring hole is provided on the main body of the retractable pulley between two parallel spring holes; A retractable sliding rod is installed in the insertion hole of the retractable pulley.

5. The telescopic sliding assembly according to claim 4, characterized in that: The retractable pulley and the retractable sliding rod have the same length in an unextended state or a natural state; and the retractable pulley and the retractable sliding rod do not interfere with each other in their sliding directions.

6. The telescopic sliding assembly according to claim 4, characterized in that: The retractable sliding rod comprises: a rod body, in which a second spring is arranged; The sliding unit comprises a fixing part and a sliding part; the fixing part is inserted into one end of the rod body and is detachably connected to one end of the second spring.

7. The telescopic sliding assembly according to claim 6, characterized in that: The sliding portion of the telescopic sliding rod is an arc-shaped structure.

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