CN213144500U

CN213144500U - Mechanical friction type pillar

Info

Publication number: CN213144500U
Application number: CN202022204658.8U
Authority: CN
Inventors: 文兴; 赵聪聪; 刘畅; 何环莎; 吕冠颖
Original assignee: Changsha Institute of Mining Research Co Ltd
Current assignee: Changsha Institute of Mining Research Co Ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2021-05-07
Anticipated expiration: 2030-09-30

Abstract

The utility model provides a mechanical friction formula pillar. The mechanical friction type support column comprises an upper column body, a lower column body and a conical clamping ring, wherein the upper column body and the lower column body are sleeved with each other; the bottom of lower cylinder is equipped with the valve that is used for business turn over water, it is equipped with the leather cup that is used for sealed to go up the cylinder bottom. Through the mode, the utility model can utilize the better sealing effect between the upper cylinder and the lower cylinder, and uses water medium to replace oil medium as a hydraulic source to be pumped into the strut from the valve for active support; after the strut reaches the supporting force of settlement, utilize toper snap ring fastening upper cylinder body and lower cylinder, then open the outlet valve and drain, rely on the frictional resistance that toper snap ring provided to play the effect that the energy-absorbing let the pressure to reach better supporting effect with simple structure and convenient operation mode, in order to satisfy practical application's demand.

Description

Mechanical friction type pillar

Technical Field

The utility model relates to a mine support technical field especially relates to a mechanical friction formula pillar.

Background

With the increase of the mining depth of metal and nonmetal mines, the requirements on the supporting technical level of volatile and stable rock masses such as top plates and surrounding rocks are higher and higher, and how to improve the supporting effect of the pillars is a problem to be solved urgently at the present stage.

At present, the pillars which are widely applied comprise hydraulic pillars and mechanical rod-shaped pillars of a coal mine. Although the hydraulic support column for the coal mine can achieve high supporting bearing capacity, the hydraulic support column is inconvenient to use and complex in step advancing process; and the whole supporting process has large material consumption and high manpower transportation cost, so that the practical application is limited, and the applicability to metal and nonmetal mines is poor. The mechanical rod-shaped pillar is small, flexible and convenient to use, and is widely applied; however, most of the purely mechanical pillars have the problem of insufficient bearing capacity and poor supporting effect.

The patent publication CN210195781U provides a hydraulic prop. This patent makes hydraulic prop be convenient for remove and carry through setting up telescopic running gear to improve the portable degree of this pillar when keeping the holding power. However, the pressure source of the hydraulic prop needs to be provided by hydraulic oil, which not only has higher cost, but also causes larger pollution; in addition, the hydraulic prop cannot effectively buffer the damage caused by the pressure coming, cannot achieve the effect of energy absorption and pressure yielding, is easy to damage in practical application, and cannot be recycled after being damaged, so that the application of the hydraulic prop is limited.

In addition, in the metal and nonmetal mine, active support is less used, and most of the active support is passive support after a roof plate is pressed, and damage caused by the passive support cannot be prevented in advance, so that the damage is generally more serious. If the used strut can not play the role of energy absorption and yielding, the strut is more easily damaged in passive support, thereby influencing the support effect on the mine.

In view of the above, there is a need to design a mechanical friction type pillar capable of absorbing energy and yielding pressure, which can achieve a more ideal supporting effect through active supporting while meeting the requirements of convenience in use, simple structure and the like, so as to solve the above problems.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned prior art's defect, the utility model aims to provide a mechanical friction formula pillar. A valve for water inlet and outlet is arranged at the bottom of the lower column body, and a water medium is used as a hydraulic source instead of an oil medium, so that active support is carried out; and through the nested toper snap ring in the junction of upper cylinder body and lower cylinder, make it can utilize the frictional resistance that the toper snap ring provided to play the energy-absorbing and let the effect of pressing after opening the outlet valve door to reach better supporting effect with simple structure and convenient operation mode.

In order to achieve the purpose, the utility model provides a mechanical friction type pillar, which comprises an upper pillar body, a lower pillar body and a conical snap ring, wherein the upper pillar body and the lower pillar body are sleeved with each other, and the conical snap ring is nested at the joint of the upper pillar body and the lower pillar body; the bottom of lower cylinder is equipped with the valve that is used for business turn over water, it is equipped with the leather cup that is used for sealed to go up the cylinder bottom, makes go up the cylinder with cylinder sealing connection down.

As a further improvement of the utility model, a ramming and smashing accessory is sleeved at the position, close to the upper part of the conical snap ring, on the outer side of the upper cylinder body; the tamping accessory can move up and down along the upper cylinder and is used for tamping the conical snap ring to fasten the upper cylinder and the lower cylinder.

As a further improvement of the utility model, the outer diameter of the upper surface of the conical snap ring is larger than that of the lower surface thereof.

As a further improvement of the utility model, be equipped with along the axial on the lateral wall of toper snap ring and run through the upper surface with the breach of lower surface.

As a further improvement of the utility model, the outer diameter of the upper column body is matched with the inner diameter of the lower column body, so that the bottom end of the upper column body is sleeved inside the lower column body; the caliber of the top end of the lower cylinder is slightly larger than that of the cylinder, so that the conical clamping ring can be conveniently installed and fastened.

As a further improvement of the utility model, the leather cup is made of silica gel.

As a further improvement of the utility model, the top of the upper column body is of an upward-protruding hemispherical structure; the top of the upper column body is covered with a top tray.

As a further improvement of the utility model, the bottom of the lower column body is of a downward-protruding semispherical structure which is symmetrical with the top of the upper column body; and the bottom of the lower column body is provided with a base which is symmetrical to the top tray.

As a further improvement of the utility model, a plurality of handles are arranged on the side wall of the lower column body.

As a further improvement of the utility model, the number of the handles is two; the two handles are respectively arranged at two ends of the lower column body along the vertical direction.

The utility model has the advantages that:

(1) the utility model has the advantages that the conical snap ring is nested at the joint of the upper cylinder body and the lower cylinder body, and the side wall of the conical snap ring is provided with the notch, so that the upper cylinder body and the lower cylinder body can be effectively fixed by the conical snap ring which is fastened after tamping, and a firm organic whole is formed; the mechanical friction type supporting column can play a role in yielding when pressure comes, can absorb destructive energy, fully reduces the destructiveness of the pressure coming, has a buffer room in the vertical direction, fully exerts the self-bearing capacity of surrounding rock, and achieves the supporting effect of energy absorption yielding.

(2) The utility model discloses an external diameter of cylinder and the internal diameter of lower cylinder on the rational design to set up in the bottom of last cylinder and be used for sealed leather cup, can make the inside better sealed degree that reaches of hydraulic prop, on this basis, the utility model discloses a bottom setting of cylinder is used for business turn over water valve under, can enough utilize water to carry out the initiative support as the hydraulic pressure source to hydraulic prop, treat that hydraulic pressure loading makes the pillar reach the supporting power of settlement after, fasten the toper snap ring, then open the valve and put water, rely on the frictional resistance that the toper snap ring provided to play the energy-absorbing and let the pressure effect, its actual supporting effect is obviously superior to passive supporting, can play and prevent suffering from in the effect in advance. Compared with the prior art with oily liquid acting as the hydraulic pressure source, the utility model discloses in regard to water as the hydraulic pressure source, both solved oily liquid with high costs, pollute big problem, also avoided in the traditional art with water as the hydraulic pressure source problem of revealing easily, not only easily on-the-spot water intaking still can take out at any time and deposit the use, and whole process is pollution-free, water source also can cyclic utilization, the bearing capacity that actually can reach 15 ~ 20 tons, can satisfy practical application's demand.

(3) The utility model provides a mechanical friction formula pillar has not only kept the small and exquisite, the convenient advantage of use of mechanical type pillar structure, has still utilized the hydraulic pressure of aqueous medium to initiatively strut to utilize the frictional force of toper snap ring to play the energy-absorbing effect of stepping down after the drainage, thereby effectively improve and strut the effect. In addition, this mechanical friction formula pillar installation is simple, save labour, but reuse, and the pumping time is shorter, overall efficiency is higher, and use safe and reliable, easily maintenance can reach better effect of strutting through the mode that dynamic pressure-bearing and static pressure-bearing combined together to satisfy practical application's demand.

Drawings

Fig. 1 is a schematic structural diagram of a mechanical friction type pillar according to the present invention.

Fig. 2 is an exploded view of the mechanical friction type pillar according to the present invention.

Reference numerals:

1. an upper column; 11. a leather cup; 12. a top tray; 2. a lower column; 21. a valve; 22. a base; 23. a handle; 3. a tapered snap ring; 4. tamping and smashing accessories.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the aspects of the present invention are shown in the drawings, and other details not relevant to the present invention are omitted.

In addition, it is also to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

As shown in fig. 1 and 2, the utility model provides a mechanical friction type pillar, including the last cylinder 1 that establishes each other, lower cylinder 2 and the toper snap ring 3 of nestification in last cylinder 1 and lower cylinder 2 junction, make and go up cylinder 1 and lower cylinder 2 and form firm organic whole under the fixed of toper snap ring 3. Simultaneously, the bottom of lower cylinder 2 is equipped with the valve 21 that is used for business turn over water, goes up 1 bottoms of cylinder and sets up the leather cup 11 that is used for sealing, goes up cylinder 1 and lower cylinder 2 and remains sealing connection throughout, makes and can not take place to reveal by the inside water of valve 21 pump income pillar, can provide great bearing capacity for the pillar.

Specifically, in an embodiment of the present invention, the outer diameter of the upper surface of the tapered snap ring 3 is larger than the outer diameter of the lower surface thereof, and a notch penetrating through the upper surface and the lower surface is further axially formed on the side wall thereof. Based on the arrangement mode, the conical clamping ring 3 can stretch out and draw back in the radial direction, so that the conical clamping ring can move up and down in a certain range, and the upper column body 1 and the lower column body 2 can be effectively fastened; the device can also play a role in pressure resistance when in pressure coming, absorb the destructive energy and fully reduce the destructiveness of the pressure coming; and the pillar has a buffer room in the vertical direction, and the self-bearing capacity of the surrounding rock is fully exerted, so that the effects of energy absorption and yielding are achieved.

The utility model discloses an embodiment, the external diameter of going up cylinder 1 bottom and the internal diameter phase-match on 2 tops of lower cylinder make the bottom of going up cylinder 1 can just overlap the inside of locating lower cylinder 2, play certain sealed effect. Meanwhile, the leather cup 11 arranged at the bottom end of the upper column body 1 further improves the sealing degree between the upper column body 1 and the lower column body 2, and effectively avoids the water in the supporting column from leaking. In one embodiment of the present invention, the cup 11 for sealing is made of silica gel; in other embodiments of the present invention, the leather cup 11 may be made of other materials according to the need.

Based on the sealed effect that above-mentioned setting mode reached, the utility model discloses can replace the oil medium among the prior art with aqueous medium, this aqueous medium not only can the scene acquire, still can take out at any time and deposit the use, and whole process is pollution-free, and the water source also can cyclic utilization. Meanwhile, the utility model can pump water into the strut from the valve 21, and can promote the strut to generate upward prefabricated bearing pressure in a water injection stamping mode; after the conical clamping ring 3 is fastened, the valve 21 is opened to drain water, and the energy absorption and pressure yielding effect can be achieved by means of the friction resistance provided by the conical clamping ring 3, so that the actual supporting effect is obviously superior to that of passive supporting, and the function of preventing accidents can be achieved.

In an embodiment of the present invention, the inner diameter of the top opening of the lower cylinder 2 is slightly larger than the inner diameter of the other portions of the lower cylinder 2, so that the upper cylinder 1 can more smoothly extend into the lower cylinder 2, thereby facilitating the installation and fastening of the tapered snap ring 3. In addition, in another embodiment of the present invention, a ramming and smashing accessory 4 is further sleeved outside the upper column body 1 at a position close to the upper part of the conical snap ring 3; the tamping accessory 4 can move up and down along the upper column body 1 and is used for tamping the conical snap ring 3 to keep the conical snap ring 3 fastened.

In an embodiment of the present invention, the top of the upper column body 1 is an upward protruding semispherical structure, and the top of the upward protruding semispherical structure is covered with a top tray 12 for making the upper column body 1 closely contact with a top plate, so as to play a good role of supporting; meanwhile, the bottom of the lower column body 2 is a downward-protruding hemisphere symmetrical to the top structure of the upper column body 1, and a base 22 symmetrical to the top tray 12 is further disposed at the bottom of the downward-protruding hemisphere, so that the lower column body 2 is in close contact with the bottom plate, and a stable supporting effect is provided for the support.

In an embodiment of the present invention, two handles 23 are disposed on the sidewall of the lower column 2 along the vertical direction for installation and transportation. In other embodiments of the present invention, the number and the position of the handles 23 can be freely set according to actual needs.

The following is the utility model provides a pair of theory of operation of mechanical friction formula pillar explains:

use the utility model provides a mechanical friction formula pillar struts the during operation, specifically includes following step:

s1, arranging the surface of the bottom plate on which the mechanical friction type support post needs to be installed, then placing the base 22, and ensuring the cleanness and stability of the base 22; the valve 21 is cleaned and lubricated and the cup 11 for sealing is checked for damage and if damaged, replaced accordingly. After ensuring that the parts are connected correctly and cleanly, the mechanical friction column is erected with its lower column 2 mounted on the base 22, the column being perpendicular to the roof face, and the top tray 12 is mounted on top of the upper column 1.

S2, connecting the water injection pipe to the pillar through the valve 21, ensuring the locking of the water injection pin. Then the valve 21 is opened, the water is pumped into the support, and the top tray 12 is contacted with the rock top plate by utilizing the hydraulic punching principle, so that the support achieves the effect of self-standing.

S3, continuously pumping water into each support column through the valve 21 until the water injection stop valve falls off (after the set water injection pressure is reached); at this point, the stanchion has been firmly braced against the roof, forming a first barrier for active bracing.

And S4, hammering the ramming and hammering accessory 4 from the highest position of the support to the conical clamping ring 3, and repeating for many times to fasten the conical clamping ring 3 in place.

S5, opening the valve 21 at the bottom of the lower column body 2, discharging water in the column, and keeping the support work of the column by the conical snap ring 3 by using the friction resistance of the conical snap ring and playing a role in absorbing energy and yielding pressure; and then taking the water injection connecting device down from the strut and carrying out rust prevention protection on the inner pipe. And checking whether each support is installed in place according to requirements again, and finishing the supporting work.

In this way, the utility model provides a mechanical friction formula pillar is portable, easy to use not only, can also utilize pollution-free water medium to play the effect of initiative strut to utilize the toper snap ring to reach the energy-absorbing effect of stepping down, thereby reach better effect of strut. Meanwhile, the mechanical friction type support is simple to mount, labor force is saved, and the mechanical friction type support can be repeatedly recycled; the supporting process based on the mechanical friction type supporting column is easy to operate, short in water pumping time, high in overall efficiency, safe and reliable in use and easy to maintain, and a better supporting effect can be achieved through a mode of combining dynamic pressure bearing in a water injection process and static pressure bearing of the conical clamping ring after water drainage.

To sum up, the utility model provides a mechanical friction formula pillar. The mechanical friction type support column comprises an upper column body, a lower column body and a conical clamping ring, wherein the upper column body and the lower column body are sleeved with each other; the bottom of the lower column body is provided with a valve for water inlet and outlet; and a leather cup for sealing is arranged at the bottom of the upper column body, so that the upper column body is connected with the lower column body in a sealing manner. Through the mode, the utility model can utilize the better sealing effect between the upper cylinder and the lower cylinder, and uses water medium to replace oil medium as a hydraulic source to be pumped into the strut from the valve for active support; after the strut reaches the supporting force of settlement, utilize toper snap ring fastening upper cylinder body and lower cylinder, then open the outlet valve and drain, rely on the frictional resistance that toper snap ring provided to play the effect that the energy-absorbing let the pressure to reach better supporting effect with simple structure and convenient operation mode, in order to satisfy practical application's demand.

The above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A mechanical friction strut, comprising: comprises an upper cylinder (1), a lower cylinder (2) and a conical snap ring (3) which is nested at the joint of the upper cylinder (1) and the lower cylinder (2); a valve (21) for water inlet and outlet is arranged at the bottom of the lower column body (2); and a leather cup (11) for sealing is arranged at the bottom of the upper column body (1), so that the upper column body (1) is in sealing connection with the lower column body (2).

2. A mechanical friction strut according to claim 1, characterised in that: a tamping accessory (4) is sleeved at the position, close to the upper part of the conical snap ring (3), on the outer side of the upper cylinder (1); the tamping accessory (4) can move up and down along the upper cylinder (1) and is used for tamping the conical snap ring (3) to fasten the upper cylinder (1) and the lower cylinder (2).

3. A mechanical friction strut according to claim 1, characterised in that: the outer diameter of the upper surface of the conical snap ring (3) is larger than that of the lower surface of the conical snap ring.

4. A mechanical friction strut according to claim 3, characterised in that: and a notch penetrating through the upper surface and the lower surface is axially arranged on the side wall of the conical clamping ring (3).

5. A mechanical friction strut according to claim 1, characterised in that: the outer diameter of the upper column body (1) is matched with the inner diameter of the lower column body (2), so that the bottom end of the upper column body (1) is sleeved inside the lower column body (2).

6. A mechanical friction strut according to claim 1, characterised in that: the leather cup (11) is made of silica gel.

7. A mechanical friction strut according to claim 1, characterised in that: the top of the upper column body (1) is of an upward-protruding hemispherical structure; the top of the upper column body (1) is covered with a top tray (12).

8. A mechanical friction strut according to claim 7, characterised in that: the bottom of the lower column body (2) is of a downward-protruding hemispherical structure which is symmetrical to the top of the upper column body (1); the bottom of the lower column body (2) is provided with a base (22) which is symmetrical to the top tray (12).

9. A mechanical friction strut according to claim 1, characterised in that: the side wall of the lower column body (2) is provided with a plurality of handles (23).

10. A mechanical friction strut according to claim 9, characterised in that: the number of the handles (23) is two; the two handles (23) are respectively arranged at two ends of the lower column body (2) along the vertical direction.