A retractable trench support device

Abstract

The present invention relates to the field of trench construction and provides a retractable trench support device, comprising two groups of support plates, wherein two groups of upper support units and lower auxiliary support units are symmetrically arranged between the two groups of support plates, wherein the upper support unit comprises: a telescopic mechanism, which is arranged between the two groups of support plates; a connecting mechanism, which is arranged between the support plates and the telescopic mechanism. Through the telescopic mechanism and the connecting mechanism in the upper support unit, the width of the support plate can be quickly adjusted according to the trench width, and the upper support point can be adjusted according to the trench height. In addition, the setting of the connecting mechanism can quickly realize the disassembly of the support plate, so that the support plate can be quickly turned over. In addition, a triangular support can be formed on the lower side of the support plate through the lower auxiliary support unit to increase the construction space in the support plate, so as to facilitate the construction of the pipeline network, thereby reducing the construction cost and shortening the construction period.

Description

Technical Field

[0001] The present invention relates to the technical field of trench support, and in particular to a telescopic trench support device. Background Art

[0002] With the acceleration of urbanization, the renovation of urban underground rainwater and sewage pipe networks is becoming more and more common. The renovation of the pipe network often requires workers to enter the trench to work. However, it is generally difficult to cause large-scale damage around the renovation project, which means that the trench excavation site is often limited. The traditional steel sheet pile support method is used, which has high construction costs and a long construction period.

[0003] Among them, the patent document with the announcement number CN 217840031 U discloses a trench support device, comprising two relatively arranged support plates, at least two upper telescopic members arranged in a row and at least two lower telescopic members arranged in a row, the ends of the upper telescopic members and the lower telescopic members are respectively hinged on the two support plates, and a locking mechanism for locking the upper telescopic members and the lower telescopic members and the support plates is provided. Although it solves the inconvenience of traditional steel sheet pile construction, in actual use, due to the horizontal layout of the lower telescopic members, the construction space of workers will be reduced during pipeline construction. At the same time, it will hinder the placement of the pipeline when the pipeline is laid, making it inconvenient for workers to place the pipeline.

[0004] The patent document with announcement number CN 218597182 U discloses a trench support device, including two support plates, two telescopic devices are arranged between the two support plates, the telescopic device includes an adjusting screw and two adjusting components, the adjusting component includes an adjusting part screwed to the adjusting screw thread, the side of the adjusting part opposite to the support plates on both sides is hinged to one end of the two connecting rods, and the other ends of the two connecting rods are hinged to the support plates on the corresponding side, one end of the adjusting screw is a positive thread, and the other end is a negative thread. It is tilted by the connecting rod inside the telescopic device to form an oblique support, so that the spacing of the support plates can be adjusted. However, the telescopic device on the lower side is in a connected state, which still reduces the construction space and affects the layout of the pipeline network.

[0005] The patent document with announcement number CN 218597182 U discloses a temporary support structure for trenches in construction projects, which specifically discloses adjusting the spacing between two interference frames through a telescopic assembly to adapt to trenches of different widths, adjusting the use angle according to the inclination of the side walls of the trench, and being able to select a suitable number of support plates to be stacked according to the height of the trench, with diversified usage methods. However, when it is in use, the lower support point formed by its connecting rod moves with the movement of the telescopic assembly. Then, when the trench is deep and the height of the telescopic assembly needs to be adjusted, the height of the synchronous lower support point will also move up, thereby affecting the support effect of the lower side of the support plate.

[0006] In response to the defects of the above-mentioned existing patent documents and traditional construction methods, we have designed a trench support device to assist in understanding the technical solution of the present invention, which does not mean that we admit that the above-mentioned content is the closest existing technology. Summary of the Invention

[0007] In order to solve the deficiencies mentioned in the above background technology, the present invention provides a retractable trench support device.

[0008] To achieve the above object, the technical solution of the present invention is implemented as follows: a retractable trench support device includes two groups of support plates, two groups of upper support units and lower auxiliary support units are symmetrically arranged between the two groups of support plates;

[0009] Wherein, the upper support unit includes:

[0010] a telescopic mechanism, disposed between the two groups of support plates, for adjusting the spacing between the two groups of support plates according to the width of the groove;

[0011] A connecting mechanism is provided between the supporting plate and the telescopic mechanism, and is used to connect the telescopic mechanism and the supporting plate and adjust the supporting height of the upper supporting unit;

[0012] The lower auxiliary supporting unit is arranged between the supporting plate and the telescopic mechanism, and is used to form an oblique support for the lower side of the supporting plate.

[0013] Preferably, the telescopic mechanism includes: two groups of hydraulic rod groups, each group of the hydraulic rod groups includes two hydraulic rods, the base ends of the two hydraulic rods are fixedly connected, and the telescopic ends thereof are connected to the support plate through a connecting mechanism.

[0014] Preferably, the connecting mechanism includes:

[0015] The connecting base is symmetrically arranged on both sides of the upper end of the support plate, and the telescopic ends on both sides of each group of the hydraulic rod group extend to the connecting base on the same side of the two adjacent groups of support plates. The connecting base is provided with a slide groove, and the slide groove is evenly provided with first pin shaft holes from top to bottom;

[0016] The telescopic end of the hydraulic rod is provided with a connecting slider, which slides in the sliding groove. The connecting slider is provided with a second pin shaft hole for fixing the connecting slider by means of a pin shaft cooperating with the first pin shaft hole.

[0017] Preferably, the lower auxiliary support unit includes:

[0018] A support rod, one end of which is rotatably arranged with the inner wall of the lower end of the support plate, and the other end of which is rotatably arranged with a slide, and the slide is sleeved on the telescopic end of the hydraulic rod;

[0019] The fixing mechanism is arranged between the slide and the hydraulic rod, and is used to fix the position of the slide after the height of the hydraulic rod group is adjusted, thereby forming a triangular support.

[0020] Preferably, the fixing mechanism includes:

[0021] Two groups of tooth grooves are symmetrically arranged on both sides of the inner wall of the slide seat where the slide seat and the hydraulic rod are connected;

[0022] Two sets of racks are symmetrically and slidably arranged on the telescopic end of the hydraulic rod, and the racks and the tooth grooves are mutually engaged;

[0023] The adjusting portion is arranged between the telescopic end of the hydraulic rod and the rack, and is used to drive the rack to slide so as to achieve the engagement and release of the rack and the tooth groove.

[0024] Preferably, the adjustment unit includes:

[0025] A slide rod is slidably arranged on the symmetric axis of the two sets of racks and in the telescopic end of the hydraulic rod, and one end of the slide rod passes through the telescopic end of the hydraulic rod to the second pin shaft hole of the connecting slider;

[0026] Multiple sets of connecting plates are symmetrically arranged on both sides of the slide bar, one end of the connecting plates is rotatably connected to the slide bar, and the other end of the connecting plates is rotatably connected to the rack;

[0027] The elastic member is arranged at the inner end portion of the slide bar and is used for providing an outward sliding force for the slide bar.

[0028] Preferably, the elastic member is configured as an abutment spring, one end of which abuts against the inner telescopic end of the hydraulic rod and the other end abuts against the sliding rod. A limiting plate is provided at the outer end of the sliding rod, and a limiting groove is provided on the connecting slider for use with the limiting plate to limit the sliding distance of the sliding rod.

[0029] Preferably, the lower end of the connecting slider is provided with an abutment protrusion, and the abutment protrusion includes a deformation part and an abutment part, the deformation part is connected to the connecting slider, and the abutment part and the deformation part are connected in an L-shape as a whole, and the abutment end face of the abutment part protrudes from the inner end face of the connecting slider. When the connecting slider is installed on the connecting base through a pin shaft, the support plate is in an inclined state, and when the hydraulic rod drives the support plate to move toward the inner wall of the groove, the lower end of the support plate first contacts the inner wall of the groove. At this time, the deformation part is deformed to generate a reaction force on the support plate through the abutment part, and at the same time, the angle between the support plate and the groove will become smaller, and the support rod is squeezed to generate pre-pressure on the lower support point.

[0030] The beneficial effects of the present invention are embodied in:

[0031] The present invention uses the telescopic mechanism and the connecting mechanism in the upper support unit to quickly adjust the width of the support plate according to the groove width, and adjust the height of the upper support point according to the groove height. In addition, the setting of the connecting mechanism can quickly realize the disassembly of the support plate, so that the support plate can be quickly turned over. In addition, the lower auxiliary support unit can be used to form a triangular support on the lower side of the support plate to increase the construction space in the support plate, facilitate pipeline construction, and thus reduce construction costs and shorten construction period. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In the attached figure:

[0033] Figure 1 This is a diagram of the entire present invention being placed in a groove;

[0034] Figure 2 It is the overall structural diagram of the present invention;

[0035] Figure 3 This is a schematic diagram of the connection between a single set of upper support units and lower auxiliary support units of the present invention;

[0036] Figure 4 This is a cross-sectional view of the interior of the fixing mechanism of the present invention;

[0037] Figure 5 A diagram showing the support relationship of angle A formed by the abutting protrusions in the present invention;

[0038] Figure 6 for Figure 2 Enlarged view of point A in the middle;

[0039] Figure 7 for Figure 3 Enlarged view of point B in the middle;

[0040] Figure 8 for Figure 4 Enlarged view of point C in the middle.

[0041] Description of reference numerals:

[0042] 1. Support plate; 2. Telescopic mechanism; 21. Hydraulic rod group; 3. Connecting mechanism; 31. Connecting base; 32. Slide groove; 321. Second pin shaft hole; 33. Connecting slider; 331. Second pin shaft hole; 4. Lower auxiliary support unit; 41. Support rod; 42. Slide seat; 43. Fixing mechanism; 431. Tooth groove; 432. Rack; 433. Slide rod; 434. Connecting plate; 435. Elastic member; 436. Limiting plate; 437. Limiting groove; 438. Abutting protrusion; 4381. Deformation portion; 4382. Abutting portion. DETAILED DESCRIPTION

[0043] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Obviously, the embodiments described are only some embodiments of the invention, not all embodiments. In the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of the invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the invention.

[0044] See also Figures 1 to 8 , a retractable trench support device, comprising two groups of support plates 1, two groups of upper support units and lower auxiliary support units 4 are symmetrically arranged between the two groups of support plates 1;

[0045] Wherein, the upper support unit includes:

[0046] The telescopic mechanism 2 is provided between the two groups of support plates 1 and is used to adjust the distance between the two groups of support plates 1 according to the width of the groove;

[0047] A connecting mechanism 3 is provided between the supporting plate 1 and the telescopic mechanism 2, and is used to connect the telescopic mechanism 2 and the supporting plate 1 and adjust the supporting height of the upper supporting unit;

[0048] The lower auxiliary support unit 4 is arranged between the support plate 1 and the telescopic mechanism 2, and is used to form an oblique support for the lower side of the support plate 1 to increase the working space between the two groups of support plates 1.

[0049] The telescopic mechanism 2 includes two hydraulic rod groups 21 , each hydraulic rod group 21 includes two hydraulic rods, the base ends of the two hydraulic rods are fixedly connected, and the telescopic ends thereof are connected to the support plate 1 through a connecting mechanism 3 .

[0050] In addition, the connecting mechanism 3 includes:

[0051] The connecting base 31 is symmetrically arranged on both sides of the upper end of the support plate 1. The telescopic ends of each group of the hydraulic rod group 21 extend to the connecting base 31 on the same side of the two adjacent groups of support plates 1. The connecting base 31 is provided with a slide groove 32. The slide groove 32 is evenly provided with first pin shaft holes 321 from top to bottom;

[0052] The telescopic end of the hydraulic rod is provided with a connecting slider 33, which slides in the slide groove 32. The connecting slider 33 is provided with a second pin hole 331 for fixing the connecting slider 33 by engaging the first pin hole 321 with the pin.

[0053] In this way, the installation height of the upper supporting unit can be adjusted according to the height of the groove, so that the upper support point formed by the upper supporting unit can abut against the upper end wall of the groove according to actual conditions.

[0054] At the same time, the lower auxiliary support unit 4 includes:

[0055] A support rod 41 is rotatably mounted on the inner wall of the lower end of the support plate 1 at one end, and a slide 42 is rotatably mounted on the other end. The slide 42 is sleeved on the telescopic end of the hydraulic rod.

[0056] Among them, the support rod 41 and the lower end rotation point of the support plate 1 can be used as a rotation axis by inserting a pin shaft, which makes it easy to disassemble the support rod 41. In this way, after the pipeline network is laid, the pin shaft there and the pin shaft at the connecting slider 33 can be removed to complete the disassembly of the support plate 1 and the upper support unit and the lower auxiliary support unit 4, and then they can be transferred. In order to facilitate the transfer of the support plate 1, a moving wheel can be set at the lower end of the support plate 1 to facilitate the movement of the support plate 1;

[0057] The fixing mechanism 43 is provided between the slide 42 and the hydraulic rod, and is used to fix the position of the slide 42 after the height of the hydraulic rod group 21 is adjusted, thereby forming a triangular support.

[0058] In addition, the fixing mechanism 43 includes:

[0059] Two groups of tooth grooves 431 are symmetrically arranged on both sides of the inner wall of the slide 42 where the slide 42 and the hydraulic rod are connected;

[0060] Two sets of racks 432 are symmetrically and slidably arranged on the telescopic end of the hydraulic rod, and the racks 432 and the tooth grooves 431 are mutually engaged;

[0061] The adjusting portion is provided between the telescopic end of the hydraulic rod and the rack 432 , and is used to drive the rack 432 to slide so as to achieve engagement and disengagement between the rack 432 and the tooth groove 431 .

[0062] At the same time, the adjustment unit includes:

[0063] The sliding rod 433 is slidably arranged on the symmetrical axis of the two sets of racks 432 and in the telescopic end of the hydraulic rod. One end of the sliding rod 433 passes through the telescopic end of the hydraulic rod and is inserted into the second pin hole 331 of the connecting slider 33.

[0064] Multiple groups of connecting plates 434 are symmetrically arranged on both sides of the sliding rod 433, with one end being rotatably connected to the sliding rod 433 and the other end being rotatably connected to the rack 432;

[0065] The elastic member 435 is disposed at the inner end of the sliding rod 433 to provide an outward sliding force for the sliding rod 433 .

[0066] Among them, the elastic member 435 is configured as an abutment spring, one end of which abuts against the inner telescopic end of the hydraulic rod and the other end abuts against the slide rod 433. A limiting plate 436 is provided at the outer end of the slide rod 433, and a limiting groove 437 used in conjunction with the limiting plate 436 is provided on the connecting slider 33 to limit the sliding distance of the slide rod 433.

[0067] Finally, the lower end of the connecting slider 33 is provided with an abutting protrusion 438, and the abutting protrusion 438 includes a deformation portion 4381 and an abutting portion 4382. The deformation portion 4381 is connected to the connecting slider 33, and the abutting portion 4382 and the deformation portion 4381 are connected in an L-shape as a whole. The abutting end surface of the abutting portion 4382 protrudes from the inner end surface of the connecting slider 33. When the connecting slider 33 is installed on the connecting base 31 through a pin shaft, the support plate 1 is in an inclined state. When the hydraulic rod drives the support plate 1 to move toward the inner wall of the groove, the lower end of the support plate 1 first contacts the inner wall of the groove. At this time, the deformation portion 4381 is deformed to generate a reaction force on the support plate through the abutting portion 4382. At the same time, the angle between the support plate 1 and the groove will become smaller, and the support rod 41 is squeezed to generate pre-pressure on the lower support point.

[0068] The deformable portion 4381 can be configured as a metal connecting plate, which is deformable.

[0069] When installing the support device, according to the actual groove height, first align the second pin hole 331 of the connecting slider 33 at the end of the hydraulic rod with the first pin hole 321 at the corresponding position on the slide groove 32 on the connecting base 31, and then fix it with a pin. At this time, the abutting protrusion 438 below the connecting slider 33 will abut against the inner wall of the slide groove 32, so that the lower end of the support plate 1 can be slightly tilted outward.

[0070] As mentioned above, before the pin is inserted into the first pin hole 321 and the second pin hole 331, when adjusting the height of the hydraulic rod according to the actual groove height, the hydraulic rod can be slid downward. At this time, as the hydraulic rod moves downward, the slide 42 will also slide on the telescopic end of the hydraulic rod until the first pin hole 321 and the second pin hole 331 are docked at the adapted position. Then, the pin is plugged and fixed, so that the connecting slider 33 is fixed. When the pin is inserted into the first pin hole 321 and the second pin hole 331, it abuts against the slide bar 433, causing the slide bar 433 to move toward the inside of the hydraulic rod, thereby squeezing the rack 432 to slide toward the tooth groove 431 to achieve locking and fixing, so that the hydraulic rod and the support rod 41 are fixed synchronously.

[0071] Then, the hydraulic rod is used to adjust the distance between the two groups of support plates 1 so that it is slightly smaller than the width of the groove, and then the support plate 1 is placed in the groove, and then the hydraulic rod is slowly used to continue to adjust the distance between the support plates 1 so that the support plates 1 and the inner wall of the groove are abutted. In the process of the support plates 1 moving toward the inner wall of the groove to abut, due to the setting of the abutting protrusion 438, the lower end of the support plate 1 will first abut against the inner wall of the lower end of the groove, and the hydraulic rod is continued to be extended until the abutting point of the hydraulic rod at the upper end of the support plate 1 abuts against the inner wall of the groove. In this way, under the setting of the abutting protrusion 438, the abutting force of the lower side of the support plate 1 can be increased, so that the lower side support situation can be changed, the working space can be increased, and the trench construction can be facilitated while also ensuring the lower side support effect.

[0072] The support plate 1 will generate an initial inclination under the action of the abutment portion 4382 provided on the elastic protrusion 438, and its inclination angle A does not need to be very large (about 5-10 degrees). In this way, when the hydraulic rod is extended, the lower end of the support plate 1 will first contact the inner wall of the groove. When the hydraulic rod continues to extend, the abutment portion 4382 will be squeezed, causing the deformation portion 4381 to deform inward, and the inclination angle A will become smaller, so that the support rod 41 is slightly squeezed and shortened, so that the support rod 41 generates a pre-pressure on the support point at the lower end, so that the oblique support can be in a stressed state until the hydraulic rod drives the support plate to move and fit into the inside of the groove, so as to effectively increase the force effect of the lower support point.

[0073] The above state is an ideal state. In actual operation, the inclination angle A does not need to be completely eliminated. It is sufficient when the support rod 41 reaches a certain pre-pressure.

[0074] It should be noted that if the embodiments of the invention involve directional indications (such as up and down), such directional indications are only used to explain the relative positional relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0075] In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, scheme B, or schemes in which A and B are satisfied at the same time. In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the invention, the descriptions of "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 technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one such feature. In addition, "multiple" refers to more than two. 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 this field to implement them. When the combination of technical solutions is mutually 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 invention.

Claims

1. A retractable trench support device comprising two sets of support plates (1), characterized in that: Two groups of upper support units and lower auxiliary support units (4) are symmetrically arranged between the two groups of support plates (1); Wherein, the upper support unit includes: A telescopic mechanism (2) is provided between the two groups of support plates (1) and is used to adjust the distance between the two groups of support plates (1) according to the width of the groove; A connecting mechanism (3) is provided between the support plate (1) and the telescopic mechanism (2), and is used to connect the telescopic mechanism (2) and the support plate (1) and to adjust the support height of the upper support unit; The lower auxiliary support unit (4) is arranged between the support plate (1) and the telescopic mechanism (2), and is used to form an oblique support for the lower side of the support plate (1); The telescopic mechanism (2) comprises: two groups of hydraulic rod groups (21), each group of the hydraulic rod groups (21) comprises two hydraulic rods, the base ends of the two hydraulic rods are fixedly connected, and the telescopic ends thereof are connected to the support plate (1) via a connecting mechanism (3); The lower auxiliary support unit (4) comprises: A support rod (41) is rotatably mounted on one end of the inner wall of the lower end of the support plate (1), and a slide seat (42) is rotatably mounted on the other end of the support rod. The slide seat (42) is sleeved on the telescopic end of the hydraulic rod. A fixing mechanism (43) is provided between the slide (42) and the hydraulic rod, and is used to fix the position of the slide (42) after the height of the hydraulic rod group (21) is adjusted to form a triangular support; The connecting mechanism (3) comprises: A connecting base (31) is symmetrically arranged on both sides of the upper end of the support plate (1), and the telescopic ends on both sides of each group of the hydraulic rod group (21) extend to the connecting base (31) on the same side of the two adjacent groups of the support plates (1). The connecting base (31) is provided with a slide groove (32), and the slide groove (32) is evenly provided with first pin shaft holes (321) from top to bottom; The telescopic end of the hydraulic rod is provided with a connecting slider (33) which slides in the slide groove (32); the connecting slider (33) is provided with a second pin hole (331) for fixing the connecting slider (33) by means of a pin that cooperates with the first pin hole (321); The fixing mechanism (43) comprises: Two groups of tooth grooves (431) are symmetrically arranged on both sides of the inner wall of the slide seat (42) at the connection between the slide seat (42) and the hydraulic rod; Two sets of racks (432) are symmetrically and slidably arranged on the telescopic end of the hydraulic rod, and the racks (432) and the tooth grooves (431) are mutually engaged; an adjusting portion, disposed between the telescopic end of the hydraulic rod and the rack (432), for driving the rack (432) to slide so as to achieve engagement and disengagement between the rack (432) and the tooth groove (431); The adjustment unit includes: A slide rod (433) is slidably arranged on the symmetrical axis of the two sets of racks (432) and in the telescopic end of the hydraulic rod, and one end of the slide rod (433) passes through the telescopic end of the hydraulic rod to the second pin shaft hole (331) of the connecting slider (33); A plurality of connecting plates (434) are symmetrically arranged on both sides of the slide bar (433), one end of which is rotatably connected to the slide bar (433) and the other end of which is rotatably connected to the rack (432) on the corresponding side; The elastic member (435) is arranged at the inner end of the slide rod (433) and is used to provide an outward sliding force for the slide rod (433).

2. A retractable trench support device according to claim 1, characterized in that: The elastic member (435) is configured as an abutting spring, one end of which abuts against the inner side of the telescopic end of the hydraulic rod and the other end abuts against the slide bar (433). A limiting piece (436) is provided at the outer end of the slide bar (433). A limiting groove (437) used in conjunction with the limiting piece (436) is provided on the connecting slider (33) to limit the sliding distance of the slide bar (433).

3. The retractable trench support device according to claim 1, characterized in that: The lower end of the connecting slider (33) is provided with an abutting protrusion (438), the abutting protrusion (438) includes a deformation portion (4381) and an abutting portion (4382), the deformation portion (4381) is connected to the connecting slider (33), the abutting portion (4382) and the deformation portion (4381) are connected in an L-shape as a whole, the abutting end surface of the abutting portion (4382) protrudes from the inner end surface of the connecting slider (33), and the connecting slider (33) is connected to the connecting slider (33). ) is installed on the connecting base (31) through a pin shaft, the support plate (1) is in an inclined state, and when the hydraulic rod drives the support plate (1) to move toward the inner wall of the groove, the lower end of the support plate (1) first contacts the inner wall of the groove. At this time, the deformation portion (4381) deforms to generate a reaction force on the support plate through the abutment portion (4382), and at the same time, the angle between the support plate (1) and the groove will become smaller, and the support rod (41) will be squeezed to generate pre-pressure on the lower support point.

Images