Pull rod for assembling and disassembling clamp assembly
Technical Field
The utility model relates to a load coal petrography sample experiment technical field especially relates to assembly and disassembly tools of holder assembly.
Background
In recent years, loaded coal rock industry CT scanning systems are widely applied to microscopic damage characteristic research of coal rocks in a loading process, not only can monitor coal rock damage dynamic evolution in a single-axis or three-axis compression process in real time, but also can realize continuous and multiple scanning records on different sections of a sample, and can also realize three-dimensional reconstruction to show a three-dimensional structure of the sample, so that the loaded coal rock industry CT scanning systems are popular among students.
Before and after the experiment is carried out on the coal rock sample, the clamp assembly needs to be assembled and disassembled. When assembling the gripper assembly, how to maintain the coaxiality of all parts is very important, and the relation is whether the experiment can be normally carried out and whether the experiment result is accurate.
When a sample is loaded, how to ensure the coaxiality of the coal sample assembly (upper pressing block) and the liquid outlet pressing block and how to conveniently take the liquid outlet pressing block out of the upper opening pipe when the coal sample assembly (upper pressing block) and the liquid outlet pressing block are disassembled after an experiment are difficult problems in practical operation.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a pull rod for assembling and dismantling holder assembly both guaranteed the axiality of going up the briquetting of play liquid briquetting and coal sample assembly, can conveniently dismantle again and take out the hydraulic block.
In order to achieve the purpose, the pull rod for assembling and disassembling the gripper assembly comprises a handle made of a cross rod, the handle is downwards connected with a vertical rod, a nut is sleeved on the vertical rod, and the nut is provided with a top cover and an opening at the lower end; the internal thread of the screw cap is matched with the external thread at the top of the seepage air outlet pipe;
the vertical rod below the top cover of the nut is fixedly connected with an annular plate used for supporting the top cover of the nut, and the vertical rod is downwards connected with a guide needle used for guiding when the clamp assembly is assembled.
Grooves for increasing friction force are uniformly distributed on the handle.
The utility model discloses have following advantage:
the utility model can ensure the coaxial line of the liquid outlet pressing block of the clamp holder assembly and the coal sample assembly when assembling the clamp holder assembly, and prevent the eccentric force; meanwhile, when the hydraulic block is disassembled, the problem of inconvenient force application can be solved.
The groove can prevent people from slipping when holding and applying force by hands.
Drawings
FIG. 1 is a schematic view of a gripper assembly;
fig. 2 is a schematic structural diagram of the present invention.
Detailed Description
The gripper assembly aimed by the utility model comprises a shell 1 as shown in figure 1, the shell 1 is provided with an inner cavity 2, the vertical axis of the inner cavity 2 is used for arranging a coal sample assembly, an upper open pipe 3 is integrally arranged at the top of the shell 1 right above the coal sample assembly, a threaded flange 4 and a liquid outlet pressing block 5 are assembled in the upper open pipe 3 from top to bottom, the threaded flange 4 is in threaded connection with the inner wall of the upper open pipe 3, the liquid outlet pressing block 5 is downwards in compression joint with the coal sample assembly, an air vent 7 which is downwards communicated with an air vent of an upper pressing block 6 of the coal sample assembly is arranged at the axis of the liquid outlet pressing block 5, a seepage outlet pipe 8 communicated with the air vent 7 is integrally arranged upwards on the liquid outlet pressing block 5, and the seepage outlet pipe 8 upwards extends out of an inner hole of the threaded flange 4; the top of the seepage air outlet pipe 8 is provided with external threads.
A liquid outlet hole 9 for surrounding pressure liquid (the surrounding pressure liquid can be water or oil) to flow out of the inner cavity 2 of the shell 1 is radially arranged in the side wall of the upper opening pipe 3 at the liquid outlet pressing block 5, and the liquid outlet hole 9 is outwards connected with a liquid outlet pipe 10; a gap is arranged between the middle lower part of the liquid outlet pressing block 5 and the inner wall of the upper opening pipe 3, and the liquid outlet hole 9 is communicated with the inner cavity 2 of the shell 1 through the gap; an annular sealing ring 11 for preventing confining pressure liquid from seeping out of the upper opening pipe 3 upwards is arranged between the top of the liquid outlet pressing block 5 and the inner wall of the upper opening pipe 3;
a lower opening pipe 12 is integrally arranged at the bottom of the shell 1 right below the coal sample assembly, a liquid inlet plug 13 is arranged in the lower opening pipe 12, and a plurality of annular sealing rings 11 for preventing confining pressure liquid from leaking out of the lower opening pipe 12 downwards are arranged between the bottom of the liquid inlet plug 13 and the inner wall of the lower opening pipe 12; a gap communicated with the inner cavity 2 is formed between the middle upper part of the liquid inlet plug 13 and the inner wall of the lower opening pipe 12, a liquid inlet hole 14 for confining pressure liquid to flow into the shell 1 is radially arranged in the side wall of the lower opening pipe 12 at the gap, and the liquid inlet hole 14 is connected with a liquid inlet pipe 15; the bottom of the outer wall of the lower opening pipe 12 is provided with external threads; and a seepage air inlet 17 which is correspondingly communicated with the vent hole 7 of the lower pressing block 16 is arranged at the axis of the liquid inlet plug 13. The housing 1 of the gripper assembly is preferably made of carbon fiber, and the scanning effect of the radiation on the sample is not influenced.
As shown in fig. 2, the pull rod for assembling and disassembling the gripper assembly of the present invention comprises a handle 61 made of a cross rod, the handle 61 is connected with a vertical rod 62 downward, a nut 63 is sleeved on the vertical rod 62, the nut 63 has a top cover 64 and is open at the lower end; the internal thread of the screw cap 63 is matched with the external thread at the top of the seepage air outlet pipe 8;
an annular plate 65 for supporting the top cover 64 of the nut 63 is fixedly connected to the stem 62 below the top cover 64 of the nut 63, and a guide pin 66 for guiding the nut 63 when the holder assembly is assembled is downwardly connected to the stem 62.
Grooves 67 for increasing friction force are uniformly distributed on the handle 61. The provision of the groove 67 prevents slipping when a person applies a force by holding with a hand.
When the clamp holder assembly is assembled, the guide needle 66 of the pull rod is inserted into the vent hole 7 of the liquid outlet pressing block 5 and then is aligned with and inserted into the vent hole 7 of the upper pressing block 6 of the coal sample assembly, so that the liquid outlet pressing block 5 is pressed into the upper open pipe 3 by guiding, the liquid outlet pressing block 5 and the coal sample assembly are ensured to be coaxial, the eccentric force is prevented,
when the hydraulic block 5 is disassembled, the threaded flange 4 is unscrewed and disassembled by a flange wrench, the screw cap 63 of the pull rod is screwed on the external thread at the top of the seepage air outlet pipe 8, the handle 61 is pulled upwards, and the annular plate 65 pulls the top cover 64 of the screw cap 63 upwards, so that the hydraulic block 5 can be conveniently pulled out, and the problem of inconvenient force application when the hydraulic block 5 is disassembled is solved.
The above embodiments are only used for illustrating but not limiting the technical solutions of the present invention, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the present invention may be modified or substituted with equivalents without departing from the spirit and scope of the invention, which should be construed as being limited only by the claims.