Adjustable supporting cushion block device for arch feet of tunnel steel arch

Abstract

The utility model belongs to the technical field of tunnel engineering construction, and particularly discloses a tunnel steel arch foot adjustable supporting cushion block device which comprises a first cushion block, a second cushion block and a spiral adjusting assembly arranged between the first cushion block and the second cushion block and used for spirally adjusting the distance between the first cushion block and the second cushion block. A locking assembly used for locking the first cushion block and the spiral adjusting assembly and / or locking the second cushion block and the spiral adjusting assembly is further arranged between the first cushion block and the second cushion block. According to the device, the height of the arch springing of the steel arch can be flexibly and dynamically adjusted, and the arch springing of the steel arch can be stably supported.

Description

Technical Field

[0001] The present application belongs to the technical field of tunnel engineering construction, and more specifically, relates to an adjustable support pad device for an arch foot of a tunnel steel arch frame. Background Art

[0002] The installation of the steel arch frame is the most important force-bearing structure of the initial support of the tunnel and is one of the important measures to ensure the safety of the tunnel. During the installation of the steel arch frame, in order to compensate for the over-excavation caused by blasting and ensure the elevation of the steel arch frame, multiple steel plates or prefabricated concrete pads are usually used to support the arch foot of the steel arch frame.

[0003] In the related art, the steel plate or precast concrete pad support method is to install several steel plates or precast concrete pads at the arch foot position in advance after removing the slag at the arch foot and completing the measurement and positioning to ensure the elevation of the steel arch frame.

[0004] During the construction process, steel plates or concrete pads of different thicknesses are often used to combine into a height that meets the requirements. Since the thickness of the steel plates or concrete pads is constant, the height of the arch foot of the steel arch frame is difficult to dynamically adjust, making the height adjustment process of the arch foot of the tunnel steel arch frame more complicated, the adjustment efficiency is low and the adjustment effect is poor, which urgently needs to be improved. Utility Model Content

[0005] In response to the defects of the prior art or the need for improvement, the present application provides an adjustable support pad device for the arch foot of a tunnel steel arch frame, aiming to improve the problem that the height of the arch foot of the steel arch frame is difficult to dynamically adjust.

[0006] The present application provides an adjustable support pad device for a tunnel steel arch foot, specifically comprising a first pad, a second pad, and a spiral adjustment component arranged between the first pad and the second pad for spirally adjusting the distance between the first pad and the second pad;

[0007] A locking assembly for locking the first cushion block and the screw adjustment assembly, and / or locking the second cushion block and the screw adjustment assembly is also provided between the first cushion block and the second cushion block.

[0008] Through the above technical solution conceived by the present application, compared with the prior art, in actual use, the distance between the first pad and the second pad can be adjusted by the spiral adjustment component, so as to flexibly adjust the distance between the first pad and the second pad dynamically, so that the user can adjust the height of the arch foot of the tunnel steel arch frame according to the needs and real-time conditions; this setting is particularly suitable for flexibly correcting the actual elevation of the arch foot by adjusting the spiral adjustment component after the elevation is re-measured. The locking component has a locking function, which can be used to limit the spacing adjustment ability of the spiral adjustment component, which is conducive to ensuring the support stability of the device for the arch foot of the steel arch frame.

[0009] In comparison, when traditionally steel plates or concrete pads of different thicknesses are combined to meet the required height, there are also situations during the construction process where it is easy for pad layers to slide, pads to be scattered and lost during the next cycle of excavation, and concrete pads to be easily crushed under pressure, resulting in a very low probability of reuse. This will lead to the need to continuously prepare steel plates or concrete pads of different thicknesses during the construction process, resulting in an increase in personnel and waste of materials. The device designed in this scheme is flexible and compact, with a wide adjustable range. It can be widely used in the elevation adjustment of the arch foot of the steel arch frame with various support parameters of the tunnel. At the same time, it can also protect the arch foot connection plate, which can be automatically detached for recycling in the next cycle of excavation, making the operation convenient and efficient, and the device is highly practical, effectively reducing the workload of adjusting the arch height.

[0010] As further preferred, the spiral adjustment assembly comprises a first connecting member, an intermediate connecting member and a second connecting member arranged in sequence along the axial direction, the first connecting member is fixed to the first cushion block, and the second connecting member is fixed to the second cushion block;

[0011] The first connecting member and the second connecting member are both threadedly connected to the intermediate connecting member, and the thread rotation direction of the first connecting member is opposite to the thread rotation direction of the second connecting member.

[0012] As further preferred, the first connecting member and the second connecting member are both threaded rods, and the intermediate connecting member is a threaded sleeve; or, the first connecting member and the second connecting member are both threaded sleeves, and the intermediate connecting member is a threaded rod.

[0013] As further preferred, the locking assembly includes:

[0014] A first limit sleeve for preventing slippage and rotating is arranged on the outer periphery of the first connecting member, and the first limit sleeve extends to the outer periphery of the intermediate connecting member;

[0015] A first locking member is used to lock or release the other end of the intermediate connecting member and the first limiting sleeve.

[0016] As further preferred, the first locking member includes an adjusting screw, one end of which is threadedly radially through the first limiting sleeve, and the adjusting screw can be tightly fixed or threadedly fixed with the intermediate connecting member.

[0017] As a further preferred embodiment, one end of the first limiting sleeve is protruded to form an outer flange, and the first cushion block or the first connecting member is provided with a limiting structure for suppressing axial displacement of the outer flange.

[0018] As a further preferred embodiment, an annular groove is formed on the outer periphery of the intermediate connecting member along the circumferential direction, and the other end of the first limiting sleeve has an inner flange extending into the annular groove.

[0019] As further preferred, the device also includes an adjustment structure for rotating the intermediate connecting member.

[0020] As further preferred, the adjustment structure includes adjustment rods, and a plurality of adjustment rods are fixed at intervals on the circumferential surface of the intermediate connecting member.

[0021] As a further preferred embodiment, the adjustment structure includes a driven gear, a support platform and a transmission gear, the driven gear is coaxially fixed with the intermediate connecting member, the support platform is slidably connected to the outer periphery of the intermediate connecting member along the circumferential direction of the intermediate connecting member, the transmission gear is rotatably connected to the support platform, the transmission gear is meshed with the driven gear, and a handle is fixed on the end face of the transmission gear.

[0022] In general, the above technical solutions conceived by this application have the following technical advantages compared with the prior art:

[0023] 1. After placing the device between the ground foundation and the arch foot of the tunnel steel arch frame to form two end supports, the first connecting member and the second connecting member are driven to move synchronously through the intermediate connecting member, so as to realize the rapid adjustment of the distance between the first cushion block and the second cushion block, thereby realizing the height adjustment of the arch foot; when the arch foot is adjusted to the specified height, the first locking member and the second locking member can also be adjusted and locked to make the entire device an integrated fixed structure, thereby ensuring the elevation and stability of the arch foot.

[0024] 2. The user only needs to adjust the handle on the transmission gear on one side of the intermediate connecting piece, and then the driven gear can be driven to rotate by turning the gear, thereby driving the intermediate connecting piece to rotate and adjust, which is conducive to adjusting the height of the arch frame foot in a narrow environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of an adjustable support pad device for a tunnel steel arch foot provided in an embodiment of the present application;

[0026] Figure 2 yes Figure 1 Sectional view along line AA;

[0027] Figure 3 It is a schematic diagram of the connection structure of the intermediate connecting member, the support platform, the driven gear and the transmission gear provided in the embodiment of the present application;

[0028] Figure 4 yes Figure 3 Cross-sectional view along line BB.

[0029] Throughout the drawings, the same reference numerals are used to denote the same elements or structures, wherein:

[0030] 1. First cushion block; 2. Second cushion block; 3. First connecting member; 4. Intermediate connecting member; 4-1. Ring groove; 5. Second connecting member; 6. First limiting sleeve; 6-1. Outer flange; 6-2. Inner flange; 7. First locking member; 8. Limiting structure; 9. Second limiting sleeve; 10. Second locking member; 11. Adjusting rod; 12. Driven gear; 13. Support platform; 14. Transmission gear. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0032] The following is combined with Figure 1-4 This application is described in further detail.

[0033] The present application embodiment discloses a tunnel steel arch frame arch foot adjustable support pad device. Figure 1-2 The adjustable support pad device of the tunnel steel arch foot includes a first pad 1, a second pad 2, and a spiral adjustment component arranged between the first pad 1 and the second pad 2 for spirally adjusting the distance between the two; a locking component for locking the first pad 1 and the spiral adjustment component, and / or locking the second pad 2 and the spiral adjustment component is also arranged between the first pad 1 and the second pad 2.

[0034] Furthermore, in this embodiment, the first cushion block 1 and the second cushion block 2 are preferably made of steel plates. The screw adjustment assembly includes a first connecting member 3, an intermediate connecting member 4 and a second connecting member 5 arranged in sequence along the axial direction, the first connecting member 3 is vertically fixed to the first cushion block 1, and the second connecting member 5 is vertically fixed to the second cushion block 2; the first connecting member 3 and the second connecting member 5 are both threadedly connected to the intermediate connecting member 4, and the thread rotation direction of the first connecting member 3 is opposite to the thread rotation direction of the second connecting member 5.

[0035] Specifically, in this embodiment, the first connecting member 3 and the second connecting member 5 are both threaded rods, and the intermediate connecting member 4 is a threaded sleeve. The two ends of the threaded sleeve are threadedly connected to the two threaded rods one by one, and the threads of the two ends of the threaded sleeve are in opposite directions. When the threaded sleeve and the threaded rod rotate relative to each other, the combined length of the threaded sleeve and the threaded rod can be adjusted, and then the spacing between the first cushion block 1 and the second cushion block 2 can be adjusted, so as to flexibly adjust the height of the arch foot of the tunnel steel arch frame.

[0036] Of course, in other embodiments, the first connecting member 3 and the second connecting member 5 can both be threaded sleeves. In this case, the intermediate connecting member 4 is a threaded rod, and both ends of the threaded rod are spirally connected to the two threaded sleeves one by one, and the threads at both ends of the threaded rod have opposite rotation directions.

[0037] In addition, in some other embodiments, the screw adjustment assembly may include only one threaded rod and one threaded sleeve. In this solution, one of the threaded rod and the threaded sleeve is fixed to the first cushion block 1, and the other of the threaded rod and the threaded sleeve is fixed to the second cushion block 2, and the threaded rod and the threaded sleeve are thread-matched. By relatively rotating the threaded rod and the threaded sleeve, the spacing between the first cushion block 1 and the second cushion block 2 can also be adjusted.

[0038] Further, such as Figure 2 As shown, when the spiral adjustment assembly includes a first connecting member 3, an intermediate connecting member 4 and a second connecting member 5 arranged in sequence along the axial direction, the locking assembly includes a first limiting sleeve 6 and a first locking member 7. One end of the first limiting sleeve 6 is anti-slip and rotatably sleeved on the outer periphery of the first connecting member 3, and the other end extends to the outer periphery of the intermediate connecting member 4; the first locking member 7 is used to lock or release the other end of the intermediate connecting member 4 and the first limiting sleeve 6, so as to achieve locking and loosening of the first cushion block 1 and the spiral adjustment assembly.

[0039] In addition, the locking assembly further includes a second limiting sleeve 9 and a second locking member 10. One end of the second limiting sleeve 9 is a rotation sleeve that prevents slippage and is arranged on the outer periphery of the second connecting member 5, and the other two ends extend to the outer periphery of the intermediate connecting member 4. The second locking member 10 is used to lock or release the intermediate connecting member 4 and the other end of the second limiting sleeve 9 to achieve locking and loosening of the first cushion block 1 and the spiral adjustment assembly. In this embodiment, the structure and installation method of the second limiting sleeve 9 are the same as those of the first limiting sleeve 6, and the structure and installation method of the second locking member 10 are the same as those of the first locking member 7.

[0040] When adjusting the height of the arch foot of the tunnel steel arch frame, the first connecting member 3 and the second connecting member 5 can be driven by the intermediate connecting member 4 to adjust synchronously, so as to realize the rapid adjustment of the distance between the first cushion block 1 and the second cushion block 2; the intermediate connecting member 4 and the first cushion block 1 can also be locked by the first locking member 7, or the intermediate connecting member 4 and the second cushion block 2 can be locked by the second locking member 10, so as to realize the fine adjustment of the distance between the first cushion block 1 and the second cushion block 2. When adjusting the arch foot to the specified height, the first locking member 7 and the second locking member 10 can also be adjusted and locked to make the whole device an integrated fixed structure, so that the adjustment device can no longer be adjusted, to prevent accidental touch after the adjustment is completed, so as to ensure the stability of the arch foot.

[0041] It should be noted that in some solutions where the spiral adjustment assembly only includes a threaded rod and a threaded sleeve, the locking assembly is correspondingly provided with only a limit sleeve and a locking member. It can be understood that the form of the limit sleeve and the locking member is the same as the first limit sleeve 6 and the second locking member 10 mentioned above, and the installation method is also the same.

[0042] Further, the first locking member 7 includes but is not limited to an adjusting screw, a latch pin, an insert rod, etc. Preferably, the first locking member 7 in this embodiment is selected as an adjusting screw, and correspondingly, a threaded hole for the adjusting screw to pass through is provided on the surface of the first limiting sleeve 6. When in use, one end of the adjusting screw is threadedly penetrated through the threaded hole of the first limiting sleeve 6 along the radial direction, and can be tightly fixed with the intermediate connecting member 4.

[0043] In some optimization schemes, the surface of the intermediate connecting piece 4 can also be provided with a plurality of threaded holes spaced apart along the circumferential and axial directions. After one end of the adjusting screw passes through the first limiting sleeve 6, it can be threadedly connected and fixed with the threaded hole on the intermediate connecting piece 4, thereby improving the connection stability between the intermediate connecting piece 4 and the first limiting sleeve 6.

[0044] Under this design, when the first locking member 7 locks the intermediate connector 4 and the first limit sleeve 6, it is difficult for the intermediate connector 4 and the first cushion block 1 to undergo axial displacement adjustment (i.e., it is difficult to displace along the length direction of the intermediate connector 4), so that the intermediate connector 4 and the first cushion block 1 remain relatively stationary. At this time, the user can only perform spiral adjustment of the intermediate connector 4 and the second connector 5 to move the second cushion block 2 closer to or away from the first cushion block 1; compared with the synchronous movement of the first cushion block 1 and the second cushion block 2 under the bidirectional spiral adjustment, the spacing adjustment rate is relatively small, and the adjustment process will be more precise, which is particularly suitable for fine-tuning of the arch foot.

[0045] Furthermore, an outer flange 6 - 1 is formed on the outer periphery of one end of the first limiting sleeve 6 , and a limiting structure 8 for suppressing the axial displacement of the outer flange 6 - 1 is provided on the first cushion block 1 or the first connecting member 3 .

[0046] like Figure 2 As shown, in this embodiment, the limiting structure 8 is fixedly arranged on the first cushion block 1, and the middle part of the limiting structure 8 shrinks inward to form a limiting ring. The formed limiting ring limits the outer flange 6-1 of the first limiting sleeve 6 between the limiting structure 8 and the first cushion block 1, so that the first limiting sleeve 6 can rotate circumferentially on the outer periphery of the first connecting member 3, but cannot slide along the axial direction of the first connecting member 3, thereby realizing the anti-slip rotation sleeve of the first limiting sleeve 6 on the outer periphery of the first connecting member 3.

[0047] Further, such as Figure 2As shown, an annular groove 4-1 is circumferentially provided on the outer periphery of the intermediate connecting member 4, and an inner flange 6-2 extending into the annular groove 4-1 is welded on the other end of the first limiting sleeve 6. The cooperation between the annular groove 4-1 and the inner flange 6-2 makes it difficult for the intermediate connecting member 4 and the first connecting member 3 to separate.

[0048] To facilitate the adjustment of the intermediate connecting member 4, the device further includes an adjustment structure for rotating the intermediate connecting member 4. Figure 1-2 As shown, the adjustment structure includes an adjustment rod 11, and a plurality of adjustment rods 11 are fixed at intervals along the circumference of the intermediate connection member 4. The fixing method between the adjustment rod 11 and the intermediate connection member 4 includes but is not limited to: threaded connection, welding, plug-in connection, etc.

[0049] In some other embodiments, such as Figure 3-4 As shown, the adjustment structure includes a driven gear 12, a support platform 13 and a transmission gear 14. The driven gear 12 is coaxially fixed to the intermediate connecting member 4. The support platform 13 is slidably connected to the outer periphery of the intermediate connecting member 4 along the circumference of the intermediate connecting member 4. The transmission gear 14 is rotatably connected to the support platform 13 through a rotating shaft. The transmission gear 14 is meshed with the driven gear 12, and a handle is fixed to the end face of the transmission gear 14.

[0050] In some preferred embodiments, the driven gear 12 is assembled from two semi-ring gears, and the driven gear 12 is coaxially fixed to the intermediate connecting member 4 through a block and slot structure or a bolt, a pin and other structures. One end of the support platform 13 is slidably connected to the circumference of the intermediate connecting member 4 through a dovetail ring and a dovetail ring groove 4-1; or the support platform 13 is connected to the circumference of the intermediate connecting member 4 along the circumference of the intermediate connecting member 4 by fixing a ring guide rail in the intermediate connecting member 4 and assembling a slider at one end of the support platform 13.

[0051] Under this design, the user only needs to adjust the handle on the transmission gear 14 on one side of the intermediate connector 4, and the transmission gear 14 can drive the driven gear 12 to rotate, thereby driving the intermediate connector 4 to rotate and adjust; compared with the scheme of setting multiple adjustment rods 11, this scheme is conducive to the adjustment of the arch frame foot in an environment with limited width. For example, when the present device is used to lift the arch foot in a narrow environment, the support platform 13, transmission gear 14 and other structures in the device are rotated and adjusted to the length extension direction of the narrow space to perform the lifting adjustment of the present device, which can effectively avoid the situation where the adjustment rod 11 collides with the narrow side wall of the narrow space when the adjustment rod 11 is used. In addition, when the present device is set near the opening of some narrow spaces, the support platform 13, transmission gear 14 and other structures of the present device can also be adjusted to the outside of the opening of the narrow space, making the operation more convenient.

[0052] It should be understood that expressions such as "include" and "may include" used in this application indicate the existence of the disclosed functions, operations or constituent elements, and do not limit one or more additional functions, operations and constituent elements. In this application, terms such as "include" and / or "have" may be interpreted as indicating specific characteristics, numbers, operations, constituent elements, components or combinations thereof, but may not be interpreted as excluding the existence or possibility of adding one or more other characteristics, numbers, operations, constituent elements, components or combinations thereof.

[0053] It should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0054] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0055] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0056] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A tunnel steel arch foot adjustable support pad device, characterized in that: It comprises a first cushion block (1), a second cushion block (2), and a screw adjustment component arranged between the first cushion block (1) and the second cushion block (2) and used for screw adjusting the distance between the two. A locking assembly for locking the first cushion block (1) and the screw adjustment assembly, and / or locking the second cushion block (2) and the screw adjustment assembly is also provided between the first cushion block (1) and the second cushion block (2).

2. The adjustable support pad device for the arch foot of a tunnel steel arch frame according to claim 1, characterized in that: The spiral adjustment assembly comprises a first connecting member (3), an intermediate connecting member (4) and a second connecting member (5) which are arranged in sequence along the axial direction, the first connecting member (3) being fixed to the first cushion block (1), and the second connecting member (5) being fixed to the second cushion block (2); The first connecting member (3) and the second connecting member (5) are both threadedly connected to the intermediate connecting member (4), and the thread rotation direction of the first connecting member (3) is opposite to the thread rotation direction of the second connecting member (5).

3. The adjustable support pad device for the arch foot of a tunnel steel arch frame according to claim 2, characterized in that: The first connecting member (3) and the second connecting member (5) are both threaded rods, and the intermediate connecting member (4) is a threaded sleeve; or the first connecting member (3) and the second connecting member (5) are both threaded sleeves, and the intermediate connecting member (4) is a threaded rod.

4. The adjustable support pad device for the arch foot of a tunnel steel arch frame according to claim 2, characterized in that: The locking assembly comprises: A first limiting sleeve (6) which is an anti-slip rotating sleeve and is arranged on the outer periphery of the first connecting member (3), and the first limiting sleeve (6) extends to the outer periphery of the intermediate connecting member (4); A first locking member (7) for locking or releasing the other end of the intermediate connecting member (4) and the first limiting sleeve (6).

5. The adjustable support pad device for the arch foot of a tunnel steel arch frame according to claim 4, characterized in that: The first locking member (7) comprises an adjusting screw, one end of which is threadedly inserted through the first limiting sleeve (6) along a radial direction, and the adjusting screw can be fixed with the intermediate connecting member (4) by abutment or thread connection.

6. The adjustable support pad device for the arch foot of a tunnel steel arch frame according to claim 4, characterized in that: One end of the first limiting sleeve (6) is protruded on the outer periphery to form an outer flange (6-1), and the first cushion block (1) or the first connecting member (3) is provided with a limiting structure (8) for suppressing axial displacement of the outer flange (6-1).

7. The adjustable support pad device for the arch foot of a tunnel steel arch frame according to claim 4, characterized in that: An annular groove (4-1) is provided on the outer periphery of the intermediate connecting member (4) along the circumferential direction, and the other end of the first limiting sleeve (6) has an inner flange (6-2) extending into the annular groove (4-1).

8. The adjustable support pad device for the arch foot of a tunnel steel arch frame according to claim 2, characterized in that: The device also includes an adjustment structure for rotating the intermediate connecting member (4).

9. The adjustable support pad device for the arch foot of a tunnel steel arch frame according to claim 8, characterized in that: The adjustment structure comprises an adjustment rod (11), and a plurality of the adjustment rods (11) are fixed at intervals on the circumferential surface of the intermediate connecting member (4).

10. The adjustable support pad device for the arch foot of a tunnel steel arch frame according to claim 8, characterized in that: The adjustment structure comprises a driven gear (12), a support platform (13) and a transmission gear (14); the driven gear (12) is coaxially fixed with the intermediate connecting member (4); the support platform (13) is slidably connected to the outer periphery of the intermediate connecting member (4) along the circumferential direction of the intermediate connecting member (4); the transmission gear (14) is rotationally connected to the support platform (13); the transmission gear (14) is meshed with the driven gear (12); and a handle is fixed to the end surface of the transmission gear (14).

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