RU2210670C1 - Device for roof bolting - Google Patents

Abstract

FIELD: mining; applicable in mine roof bolting. SUBSTANCE: device has body with shank, thread whose inner diameter corresponds to outer diameter of bolt shank thread, balls accommodated in wall holes over body perimeter and fixed from one side in circular bore of rod located in body, and from other side by spring-loaded holder fitted on body. Spring is secured to body external wall, and thread is located on body internal wall on side of its opened end. Body external surface and holder internal surface may be made stepped. EFFECT: reduced labor input into manufacture and operation of device, higher efficiency of driving operations with high quality. 2 cl, 2 dwg

Description

 The invention relates to mining equipment, and in particular to devices for installing anchor support.

 A device for installing the anchor using an adhesive synthetic material (DE, OS 3344511, class E 21 D 20/00, publ. 1985), which is formed by two ribs passing only along the perimeter of the rod of the anchor, the end sides of which form the supporting surface, the latter being made on a sleeve, on one side of which a cutout is made for receiving the anchor nut, and on the other side means are provided for transmitting torque.

 However, this design creates the possibility of damage by the supporting surfaces of the sleeve of the threaded part of the shank of the anchor, in addition, the supporting surfaces increase the complexity of manufacturing the anchor.

 A device for installing anchor bolts (GB, 2172682, class E 21 D 20/00, 21/00, publ. 1986), which performs the function of a rotating tool, which is a pipe with a supporting transverse element inserted into the diametrical slot of the anchor bolts.

 This device is also associated with the possibility of damage to the threaded part of the anchor bolt, and the need to manufacture an anchor with a diametrical slot at the end leads to an increase in the complexity of manufacturing the anchor.

 A device for installing an anchor (ed. St. USSR 1721255, class E 21 D 21/00, 1989) is known, which has a body with a cylindrical shank, a snap lock, spring-loaded on the connector side, equipped with an internal semicylindrical threaded recess and a protrusion on the free end, while the other end is pivotally attached to the housing, as well as a retaining sleeve, spring-loaded and mounted on the shank with the possibility of interaction with the protrusion of the split lock.

 In the above device, there is an unreliable design, namely, the presence of a compound thread (of the two halves, one on the body and the other on the notch of the split lock), the need to constantly resort to the thread connector before inserting the anchor into the device, which is also causes an increase in the complexity of manufacturing and operating the device.

 The closest in design features is a device for installing anchor support (ed. St. USSR 1456598, class E 21 D 21/00, 1987 addition to ed. St. 1249167, class E 21 D 21/00, 1985 .) is a prototype. The device includes a housing with a cylindrical shank, inside of which there is a spring preloaded, a glass mounted on the pin, held at the open end of the housing by the end cap. Balls are installed in the holes of the glass, which, in contact with the conical inner surface of the body under the action of axial force, press the segments of the split coupling, made with internal thread and installed inside the glass, to the shank of the anchor and it is jammed in the device. The release of the anchor occurs only after the application of axial force, which is applied in the opposite direction of introduction of the anchor into the hole.

For reasons that impede the achievement of the following technical result when using the known device adopted for the prototype is that:
- the presence in the device of a split coupling containing segments, the need to hold a spring-loaded cup with balls inside the housing by an end cap - all this complicates the design and increases the complexity of manufacturing and operating the device;
- the removal of axial force and the release of the anchor occurs in the opposite direction of its introduction into the hole and requires an exposure in time until the self-hardening mass solidifies in order to avoid breaking its solidity.

 The invention consists in the following.

 The objective of the invention is to reduce the complexity both in the manufacture and in operation of the device for installing the anchor lining, increasing the productivity of tunneling, while maintaining the quality characteristics of the installation of anchor lining.

 EFFECT: device for installation of an anchor support (adapter), simplified in design, was created, which allows it to be screwed from the anchor, without waiting for the solidification of the self-hardening mass to end, without violating the solidity and bearing capacity of the anchor support, and therefore, to increase the productivity of tunneling.

 The specified technical result in the implementation of the invention is achieved by the fact that in the proposed device for installing anchor support, including a housing with a shank, a thread whose inner diameter corresponds to the outer diameter of the thread of the shank of the anchor, balls located in the holes of the walls.

Distinctive features of the proposed device for installing anchor support from the above known, closest to it devices are the following:
- balls are placed in the holes of the walls around the perimeter of the housing and are fixed on one side in the annular groove of the rod located in the housing, on the other hand - a spring-loaded clip worn on the housing, and the spring is fixed on the outside, and the thread is located on the inner wall of the housing from the side its open end;
- the outer surface of the glass and the inner surface of the cage are made in response step.

 Placing the balls directly in the housing walls, fixing them in the annular groove of the rod on one side and a spring-loaded clip on the other hand, allows you to keep the stem from axial movement inside the housing and feed the anchor screwed into the device with a threaded shank into the thread of the housing until it stops against the rod, in hole - using the actuator. Elimination of the interference "anchor-device" occurs gently due to the movement of the balls during movement of the cage along the housing in the direction of introduction of the anchor into the hole, while the balls release the rod. When compressing the retaining spring, the cage moves with a step of a larger diameter, onto the casing with a smaller diameter (due to the stepped surfaces: the inner - at the cage and the outer - at the casing), opposite the slot with balls, allows them to move slightly radially and release the stem.

 Thus, the proposed design of the device made it possible to solve the above problems and achieve the expected technical result, and, most importantly, to increase the productivity of sinking work while at the same time quality, removing the device from the anchor without appropriate exposure until the fixing mixture hardens.

 The analysis of the prior art by the applicant made it possible to establish that an analogue characterized by sets of features identical to all the features of the claimed product is missing. Therefore, the claimed invention meets the condition of patentability "novelty."

 Search results for known solutions in this and related fields of technology in order to identify features that match the distinctive features of the prototype of the claimed invention have shown that they do not follow explicitly from the prior art. From the prior art determined by the applicant, the influence of the transformations provided for by the essential features of the claimed invention on the achievement of the specified technical result has not been revealed. Therefore, the claimed invention meets the condition of patentability "inventive step".

 The drawings show: Fig. 1 shows a device for installing an anchor support (general view); figure 2 is a section aa.

 Information confirming the possibility of carrying out the invention to obtain the above result is as follows: the device for installing the anchor lining consists of a housing with a shank 1 (see figure 1) having a stepped outer surface, holes (two or more) in the wall located along the perimeter of the smaller diameter of the housing 1, in which the balls are located 2. Inside the housing 1 is inserted a rod 3 with an annular groove having a tapered surface, which is contacted by the balls 2, introduced through the holes, uniformly located along the perimeter of the housing 1 (see Fig. 2), and holding the rod 3 from axial movement inside the housing 1. In turn, the balls 2, located simultaneously in the annular groove of the rod 3 and in the openings of the walls of the housing 1, are fixed from the outside by a cage 4 (see FIG. 1), which has a stepped inner cylindrical surface corresponding to the housing 1 and is worn on the housing 1. The holder 4 is pressed by a spring 5 located on the outer wall of the housing 1 and is held by a washer 6 with a locking ring 7 from the side of the open end of the housing 1, and on the inner side of the wall is made thread, the inner diameter of which corresponds to the outer diameter of the shank of the anchor 8.

 The device for installing the anchor support works as follows: the device for installing the anchor support is screwed onto the threaded shank of the anchor 8 until it stops against the end of the stem 3. The shank of the housing 1 is inserted into the actuator (not shown), which transfers the shank of the anchor 8 (and therefore to the anchor itself ) through the device for installing the anchor lining, the torque necessary for introducing the anchor into the previously prepared hole.

 After installing the anchor in the hole, without waiting for the complete hardening of the self-hardening mass, the device for installing the anchor support from the anchor is removed. To do this, a key (not shown) is fitted onto the shank of the housing 1, having a cylindrical nozzle at the end, which, when applied to the key, moves the yoke 4 along the outer wall of the nozzle 2 in the direction of introduction of the anchor into the hole, while the yoke 4 compresses the spring 5, held by a washer 6 with a locking ring 7, and mounted with its inner surface of a larger diameter above the balls 2, allowing them to radially move in the openings of the walls of the housing 1. Balls 2, in turn, release the rod 3, which slightly moves along the axis towards the shank of the device 1, eliminating the tightness in the threaded connection "device - anchor", and the device for installing the anchor lining gets the opportunity to screw on the anchor without effort.

Thus, the above information indicates the fulfillment of the following set of conditions when using the claimed device for installing anchor support:
- a device for attaching anchor supports embodying the claimed invention in its implementation, is intended for use in mining construction as equipment for attaching mine workings;
- for the claimed device for installing the anchor support in the form described in the independent clause of the claims, the possibility of manufacturing and using means and methods known before the filing date of the application has been confirmed;
- a device for installing an anchor support, embodying the claimed invention when used, is capable of achieving the technical result perceived by the applicant, which is confirmed by tests of a prototype at the SHAHTA NAMED AFTER V.I. LENIN OJSC of the Kemerovo Region, which showed that when using the inventive device for installation anchor support increases the productivity of tunneling while maintaining safety requirements and the high bearing capacity of anchor support. The obtained results determined the decision on setting up this device for installing anchor support for production and preparing documentation for serial production.

 Therefore, the claimed invention meets the condition of "industrial applicability".

Claims (2)

 1. A device for installing an anchor support, comprising a housing with a shank, a thread whose inner diameter corresponds to the outer diameter of the thread of the anchor shank, balls located in the holes of the walls, characterized in that the balls are placed in the holes of the walls around the perimeter of the housing and are fixed on one side in the annular groove of the rod located in the housing, on the other hand, is a spring-loaded cage, worn on the housing, and the spring is fixed to the outer, and the thread is located on the inner wall of the housing from its covered end.  2. A device for installing an anchor lining according to claim 1, characterized in that the outer surface of the housing and the inner surface of the cage are made stepwise in response.

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