Jacking system of tennis rack

Abstract

The jacking system comprises a jacking base provided with sinking grooves, and telescopic lifting auxiliary parts are installed in the four grooves in an embedded mode; a telescopic jacking piece is mounted in the middle of the top surface of the jacking seat; a pull rod is rotatably hinged to the top of the jacking part, a jacking frame for supporting the net rack ball is installed on the top face of the jacking base, the jacking part is located in the middle of the jacking frame, and the inner face of the bottom of the jacking frame is rotatably hinged to the bottom of the pull rod. In a jacking system of the constructed tennis frame, in the jacking process of the jacking frame, when a pull rod, hinged to a jack, of the jacking frame is subjected to fatigue damage, the four lifting auxiliary pieces can support the four feet of the bottom of the jacking frame at the same height, and the jacking frame is not damaged; the problem that four legs at the bottom of a jacking frame cannot be supported at the same height when a single jack is mounted in the middle of a jacking seat and a pull rod is subjected to fatigue damage is solved.

Description

Technical Field

[0001] The utility model relates to a jacking system of a tennis rack and belongs to the technical field of rack installation and construction. Background Art

[0002] When constructing large buildings such as airports, it is necessary to construct a structure with a concrete frame as the main body, a steel structure for the interlayer and a grid for the roof. After the grid is assembled as a whole, multiple stress nodes of the grid need to be lifted to the corresponding installation height for installation.

[0003] The existing jacking technology for the grid frame can be found in Chinese patent announcement number CN208202143U, and the disclosed technology is: a single jack is installed on the middle part of the jacking seat, and the jack is hinged to the jacking frame through a pull rod to jack up the jacking frame as a whole, and then the standard sections are gradually installed to realize the jacking process of the grid stress node; although the jack can support the grid stress node at the top by the pull rod to force the jacking frame, but as the number of standard sections installed on the jacking frame increases, the overall weight load of the jacking frame increases. When the pull rod of the jacking frame articulated jack is fatigued and damaged during the jacking process of the jacking frame, the four legs at the bottom of the jacking frame cannot be supported at the same height. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a jacking system for a tennis rack.

[0005] The utility model is realized through the following technical solutions.

[0006] The utility model provides a tennis rack lifting system, comprising:

[0007] A lifting seat with sunken grooves, in which four grooves are pre-buried and installed with retractable lifting auxiliary parts;

[0008] A retractable lifting piece is installed in the middle of the top surface of the lifting seat;

[0009] The top of the jacking piece is rotatably hinged with a pull rod, the top surface of the jacking seat is equipped with a jacking frame for supporting the grid ball, the jacking piece is located in the middle of the jacking frame, and the bottom inner surface of the jacking frame is rotatably hinged with the bottom of the pull rod.

[0010] The lifting component and the lifting auxiliary component are hydraulic jacks.

[0011] The oil port of the hydraulic jack is connected to the hydraulic oil pump station through a one-way valve.

[0012] The pull rod itself is composed of at least two rod bodies that are rotatably hinged.

[0013] The beneficial effects of the utility model are as follows: in the jacking system of the constructed tennis rack, the retractable lifting auxiliary part lifts the corresponding jacking frame in the groove sunken in the jacking seat, and the pull rod of the jacking part assists in bearing force during the lifting process of the jacking frame, thereby reducing the load on the pull rod; during the jacking process of the jacking frame, when the pull rod of the hinged jack of the jacking frame is fatigued and damaged, the four lifting auxiliary parts can support the four bottom legs of the jacking frame at the same height, thus solving the problem that a single jack installed in the middle of the jacking seat cannot support the four bottom legs of the jacking frame at the same height when the pull rod is fatigued and damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the lifting auxiliary part and the lifting part of the utility model when the lifting frame is lifted;

[0015] Figure 2 It is a schematic diagram of installing two main pipes of the opposite feet after the jacking frame of the utility model is jacked up;

[0016] Figure 3 It is a schematic diagram of installing four main pipes on the opposite feet after the jacking frame of the utility model is jacked up;

[0017] In the figure: 1-lifting seat; 11-groove; 12-lifting auxiliary part; 2-lifting part; 3-pull rod; 4-lifting frame; 41-main pipe; 5-grid ball. DETAILED DESCRIPTION

[0018] The technical solution of the utility model is further described below, but the scope of protection required is not limited to the description.

[0019] like Figures 1 to 3 shown.

[0020] The present application discloses a tennis rack lifting process, comprising:

[0021] Step 1: Building the jacking system of the tennis rack: construct a jacking seat 1 using steel or concrete on the construction site, with a retractable jacking member 2 installed in the middle of the top surface of the jacking seat 1; the top of the jacking member 2 is rotatably hinged with a pull rod 3, and a jacking frame 4 for supporting the net ball 5 is installed on the top surface of the jacking seat 1, the jacking member 2 is in the middle of the jacking frame 4, and the bottom inner surface of the jacking frame 4 is rotatably hinged with the bottom of the pull rod 3; the jacking seat 1 is provided with sunken grooves 11 corresponding to the four corners of the bottom of the jacking frame 4, and retractable lifting auxiliary parts 12 are pre-embedded in the four grooves 11; a jacking system of a tennis rack is presented; see Figure 3 shown.

[0022] The jacking member 2 and the lifting auxiliary member 12 can be formed by hydraulic jacks, and the oil port of the hydraulic jack is connected to the hydraulic oil pump station through a one-way valve. The jacking member 2 and the lifting auxiliary member 12 can also be controllable telescopic members such as telescopic pneumatic rods or telescopic threaded rods.

[0023] The above pull rod 3 itself is composed of at least two rod bodies that are rotatably hinged.

[0024] Step 2: Install the standard section for jacking: the jacking piece 2 is extended to pre-stress the tie rod 3 so that the tie rod 3 itself is in a straightened state; the four lifting auxiliary pieces 12 are corresponding to the four corners of the jacking frame 4 and are lifted to a height slightly higher than the predetermined installation height of the standard installation section. During this process, the jacking piece 2 is also lifted synchronously, so that the four lifting auxiliary pieces 12 at the four corners of the bottom of the jacking frame 4 are mainly stressed during jacking. Figure 1 Status shown;

[0025] Retract the two lifting aids 12 at the diagonal positions, such as Figure 2 As shown, the left front and right rear lifting auxiliary parts 12 are retracted, and the jacking frame 4 can be mainly supported by the left rear and right front lifting auxiliary parts 12. At this time, the jacking member 2 pulls the jacking frame 4 through the pull rod 3 to assist in the force bearing, lower the pull rod 3 to bear the load, and install the standard section main pipe 41 at the bottom of the two feet of the jacking frame 4;

[0026] Then retract the other two lifting auxiliary members 12 at the diagonal positions again, such as Figure 3 As shown, at this time, the weight of the jacking frame 4 is mainly supported by the main pipe 41 with the installed standard section, and the jacking member 2 is auxiliaryly supported by the jacking frame 4 through the pull rod 3;

[0027] Then install the main pipe 41 of the standard section to the bottom of the two feet of the jacking frame 4. At this time, the main pipes 41 of the four standard sections are all installed. The main pipes 41 are installed with inclined webs to form a standard section connected to the bottom of the jacking frame 4. At this time, the four lifting auxiliary parts 12 are all retracted into the groove 11 sunken in the jacking seat 1, as shown in FIG. Figure 3 As shown, the bottoms of the four pull rods 3 are separated from the last standard section and hinged with the newly installed standard section at the bottom. When installing the next standard section, repeat step 2 several times to achieve the jacking of the tennis rack to the required height.

[0028] In the jacking system of the constructed tennis rack, a retractable lifting auxiliary part 12 lifts the corresponding jacking frame 4 in the groove 11 of the jacking seat 1, and the pull rod 3 of the jacking part 2 assists in bearing force during the lifting process of the jacking frame 4, thereby reducing the load on the pull rod 3. During the jacking process of the jacking frame 4, when the pull rod of the hinged jack of the jacking frame is fatigued and damaged, the four lifting auxiliary parts 12 can support the four bottom feet of the jacking frame 4 at the same height, thereby solving the problem that a single jack installed in the middle of the jacking seat cannot support the four bottom feet of the jacking frame at the same height when the pull rod is fatigued and damaged.

Claims

1. A tennis rack lifting system, characterized in that: include: A lifting auxiliary component (12) capable of lifting the four legs of the lifting frame (4); It also includes a lifting seat (1) provided with a sinking groove (11), and retractable lifting auxiliary parts (12) are pre-buried and installed in the four grooves (11); A retractable lifting member (2) is installed in the middle of the top surface of the lifting seat (1); The top of the lifting member (2) is rotatably hinged with a pull rod (3), the top surface of the lifting seat (1) is equipped with a lifting frame (4) for supporting the grid ball (5), the lifting member (2) is located in the middle of the lifting frame (4), and the bottom inner surface of the lifting frame (4) is rotatably hinged with the bottom of the pull rod (3).

2. The tennis rack lifting system according to claim 1, characterized in that: The pull rod (3) itself is composed of at least two rod bodies that are rotatably hinged.

3. The tennis rack lifting system according to claim 1, characterized in that: The lifting component (2) and the lifting auxiliary component (12) are hydraulic jacks.

4. The tennis rack lifting system according to claim 3, characterized in that: The oil port of the hydraulic jack is connected to the hydraulic oil pump station through a one-way valve.

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