SU717301A1 - Device for mounting sensors in well wall - Google Patents

Description

(54) DEVICE FOR INSTALLING SENSORS IN THE WALL

one

The invention relates to devices for geophysical surveys, namely, devices for installing sensors into. well wall.

A device is known for inserting a sensor into the undisturbed soil of the borehole wall, in which there is an injection unit and a sensor, the latter using the device installed through the side wall of the borehole into the ground 1. In this device, the sensor is bullet-inserted, the depth of it remains unknown in the ground, and the sensor element is not oriented.

When conducting geophysical surveys with pressure measurements over the depth of the soil mass, the determining criteria are accurate knowledge of the depth of installation of the sensor and the position of the sensing element, since the accuracy of measurements and the correct assessment of the effect of pressure on the submerged structures depend on it.

The closest technical solution to the proposed device is for

installation of sensors in the borehole wall which includes a drive, a sliding element, a sensor, a guide for the sensor, an indicator of the depth of insertion of the sensor. In this device, an increase in the depth of insertion of the sensor is provided by a cassette made in the form of spring-loaded inserts located one above the other and installed along the central and lateral guides. The implementation mechanism of this device contains a sliding element in the form of a lead screw, which directly presses the sensor, and then the inserts as they enter the ground. -.

The device works as follows. When the drive is turned on, the sliding element pushes the sensor out of the guide and inserts it into the ground. The inserts are in their original position. After inserting the sensor, the retractable element is returned to its original position by reversing. In this case, under the action of the compressed spring, the inserts are mixed and the top occupies the place in the guide where the sensor was in the initial position. When the engine is restarted, the sliding element moves the upper insert, which in turn pushes the sensor forward, inserting it deep into the array. After this operation noBTopjito cn. , ",." .. "With this process, the internal data sensor consumes half of the time spent on unproductive work, namely, on the return stroke of the sliding element (lead screw) carried out with the same speed as the standout; see it as it is based on the constructive pair, screw-nut. Useful work can only be done when Schd5bv6g6 Oynt is nominated for the sensor and inserts forward. At the same time for the return of any way; screw. The initial position is necessary for reversing, which improves the design of the device. The aim of the invention is to reduce the installation time of the sensors. The object of the invention is achieved by performing a pusher drive in the form of a toothed rack with a return spring connected to the housing, and a toothed sector kinematically associated with the gearbox. In addition, the length of the arc of the toothed sector is equal to the length of the toothed part of the rail. The length of the toothed portion of the rake is equal to the length of the insert. Such an implementation of the device insertion unit virtually eliminates the time for unproductive movement of the gIfejiffl 1if8K7ie shtkkktvanyv sensor or insertion due to the fact that the rail to the initial position is bent back by the spring force almost instantaneously and at the same time does not require reversal, i.e. FIG. 1 shows the preset device, general view; in fig. 2 is a view along arrow A in FIG. 1 on aleGenzla Jedrei; in fig. 3 - cassette with inserts; FIG. 4 is an insert; in fig. 5 - J cassette element with insert and sensor, into the ground through STY1N1Kusk1: a: W. The device contains a drive including an electric motor 1, body 2, CYLGYAnDry-. gear 3, implementation unit; from the worm gear 4 with the sector 5 mounted on the same shaft with the worm gear, and the rail 6, which is the pusher, the sensor 7 in the guide 8, the cassette 9, grasping the side surfaces of the guide 8 and attached to it screw. On the pinion shaft, there is a protrusion 10, and in case 2, there is installed a switch 11 that provides an indication of the depth of insertion of the sensor. The rail 6 is installed in the guide support 12. The rail surface facing the sector has a tooth, and the length of the arc of the toothed sector is equal to the length of the gear rail portion that meshes with it. The inner end of the rail 6 St. 5Shtgr Y Pbm6 {: f J f :: ..- ---

Claims (2)

 --- .. ELEVEN 13 with a rear wall of the housing 2. In the cassette 9 one above the other is placed inserts 14, loaded on one side by a spring 15. The inserts are placed along three guides: central 16, holding the inserts from displacement, and. two side 17, preventing distortions when moving inserts. The side guides are not in the form of flat springs and have a protrusion 18 on the loose rail that holds the inserts in the cassette when it is installed on the insertion unit. The insert 14 has a longitudinal groove 19 for laying the cable and a hole 20 for the central guide. The ends of the inserts are provided with a protrusion 21 on one side and a recess 22 on the other side, which ensures a reliable connection of the inserts during insertion. The number of inserts is determined by the predetermined depth of penetration of the sensor into the soil. The length of the toothed part of the rail 6 is equal to the length of the insert 14, which ensures the complete exit of the insert from the guide and minimizes idle operation. Sector 5 has such a profile that its angle of rotation when idling (i.e. when the sector tooth is not engaged with the rack) provides the minimum necessary time for the insert to enter. guide. The operation of the device and the monitoring of the depth of insertion are controlled by means of a console 23 connected to the drive mechanism by cable 24. A rigid rod 25 of the pipe links serves to lower the device into the well. The device operates as follows. The engine 1 is turned on and the force from it is through gears 3, the worm gear 4 is transmitted to sector 5, which rotates the rail 6 along the guide support 12. The rail, acting on the outer end of the sensor 7, pushes it out track 8 and injects into the ground. At the same time, the inserts 14 are located in the cassette 9 in the initial position, and the lower surface of the recess is located on the outer surface of the upper insertion.,. At the moment when the sensor leaves the sector of the guide tooth, it is disengaged from the rail and it returns to its original position under the action of the tension spring 13. In this case, under the action of the compressed spring 15 of the insert 14, the upper part of them moves, and occupies that place in the guide 8, where the sensor is in the initial position. At this moment, sector 5, continuing to rotate in the same direction, ends the rotation of the E idling mode, its tooth engages again with the teeth of the rail and moves it forward, while the upper insert moves forward and enters with a force of its protrusion 21 into the groove the sensor and further the insert and the sensor are moved together. When the sensor and inserts enter the ground, the sensor cable is placed in the groove 19 of the inserts. With the further implementation of the sensor, the operations are automatically repeated. Thus, the introduction into the mechanism of the gear sector associated with the rail, and the supply of the rail with a return spring, reduces the time required for the introduction of sensors by almost two times. Claim 1. Device for installation of sensors in the borehole wall, comprising a housing, a pusher with a drive and a gearbox and a cassette with spring-loaded inserts, characterized in that, in order to reduce the time for installation of sensors, the pusher drive is designed as a toothed rack with a return spring, connected to the housing, and the toothed sector, kinematically associated with the gearbox. & Device under item 1, characterized in that the length of the arc of the toothed sector is equal to the length of the toothed part of the rack. , Sources of information taken into account in the examination 1. USSR author's certificate number 326355, cl. E 21 B 47/00, 1970. 2. USSR author's certificate number 562641, cl. E 21 B 47/00, 1975. 6tJ A FIG. 2 eleven 21 FIG L