30results about How to "Protective thread" patented technology

A method and apparatus for running tubular(s) into a well bore for use with a top drive or power swivel comprising a make-up assembly with inner and outer members, one of which has an array of ramped or inclined surface(s) while the other is an inner or outer cage with rolling support(s) with or without a central spindle and openings which may also be referred to as tubular engagement apparatus wherein relative movement of the members urges the rolling support(s) to protrude radially through the openings to engage a tubular internally or externally. Also provided is an elevator assembly with elevator links and transfer elevators to position tubular for engagement by the make-up assembly.

A steering head that comprises a forward pivot block and a rearward pivot block. The forward pivot block is attached to a leading edge of a casing. The rearward pivot block is attached to a trailing portion of the casing, the leading edge being separated from the trailing portion by a gap in the casing. Extending between the forward and rearward pivot blocks is a central drive shaft. The central drive shaft includes a threaded portion and is rotatable to move a drive nut away from or towards the rearward pivot block. The central drive shaft, to either side of the drive nut, is covered by a cylindrical sleeve. A second internal sleeve extends between the rearward pivot block and the drive nut to protect the threads of the drive shaft from earthen debris when the casing is being advanced or reversed to steer the forward-most casing portion during operation.

The invention belongs to the field of mechanical design, and relates to a floatable drill rod connecting device. The floatable drill rod connecting device is installed on a power head spindle and comprises a connector body connected with the power head spindle in a matched mode and a limiting device arranged outside the connector body and the power head spindle. An elastic piece with a floating positioning function is further arranged between the connector body and the power head spindle. The floatable drill rod connecting device has an axial floating function, rigid extrusion and friction between the connector body and threads of a front end drill rod are changed into an elastic gradual change process, the threads of the connector body are effectively protected, and the service life of the connector body is prolonged. By arranging a connecting sleeve, dynamic connection which generates impact for a long time is transferred between the connector body and the connecting sleeve, and thespindle and the connecting sleeve are in pin connection without impact, so that the probability that the spindle is directly damaged is greatly reduced, the maintenance cost is reduced, and the maintenance time is shortened.

The invention discloses a storage cabinet which comprises a storage cabinet frame. The center point of the storage cabinet frame is provided with a front-rear through storage cavity. The lower end face of the placement cavity is provided with a storage plate. The lower end of the storage plate is provided with multiple sets of drawing and pulling boxes distributed at equal intervals on the upper, lower, left and right portions. The upper end of the storage cavity is provided with multiple sets of wall cupboards. The front end faces of the wall cupboards and the front end faces of the drawing and pulling boxes are provided with handles. A side-turning preventing device is arranged in a top base of the storage cabinet frame and located on the upper sides of the wall cupboards. The side-turning preventing device comprises a fixing frame, a left side locking arm and a right side locking arm, wherein the fixing frame is fixedly installed in a bearing wall, and the left side locking arm and the right side locking arm are movably installed at the rear end of the top base of the storage cabinet frame in a left-right symmetrical mode. The top base of the storage cabinet frame is further internally provided with a guide groove which is extended front and back and communicates with a sunk groove. A guide rod is installed in the guide groove in a sliding mode. The storage cabinet is simple in structure, convenient to use, stable in operation and high in safety.

The invention discloses a demoulding mechanism for an inner screw with an undercut, comprising a spring plate, a top plate, a main shaft, a threaded shaft, an inner rod and a mounting plate; the mounting plate, the spring plate and the top plate are from top to bottom. They are arranged in front of each other and there is a gap between them. The bottom four corners of the elastic plate are provided with top extension springs; the main shaft passes through the top plate and the elastic plate from the bottom to the top of the mounting plate and is connected with a driving gear; the threaded shaft There are two symmetrically arranged on both sides of the driving gear. The top of the threaded shaft is installed with a driven gear that meshes with the driving gear. The inner rod vertically passes through the threaded shaft and extends downward. The inner rod includes a core rod and a sleeve. On the sleeve rod around the core rod, a slope block is installed on the core rod, and a slider on the sleeve rod is clamped with the slope block. The invention effectively protects the inner thread and the undercut of the product through the step-by-step demolding design, and at the same time has a simple structure and is worthy of popularization and use.

A building material transport device comprises a base board fixedly installed on the ground, and a top board fixedly installed on a roof; two guide rods in bilateral symmetry and a lifting threaded rod located between the two guide rods are fixedly installed between the base board and the top board; a lifting frame is installed on the lifting threaded rod; guide holes are formed in the left and right sides of the lifting frame symmetrically; the guide holes and the guide rods are matched; guide sleeves are installed on the guide rods in a sliding mode; the upper end faces of the guide sleeves and the lower end face of the lifting frame are fixedly connected; a triangular board is fixedly installed between the front end of each guide sleeve and the bottom end of the lifting frame and internally provided with a transverse groove and a longitudinal groove communicating with the transverse groove; a sliding board is installed in a cavity of the lifting frame in a vertical sliding mode; the guide sleeves are internally provided with sliding grooves extending front and back; a sliding frame is installed inside each sliding groove in a sliding mode and internally provided with a groove allowing the corresponding guide rod to penetrate through; the rear end wall of each groove is an arc face; and each arc face is fixedly provided with an arc friction plate.

An electrically adjustable lifting seat, comprising: a seat surface (91), a base (90), a housing (3) fixedly mounted on the base (90), and an upper end of the housing (3) The end cover (96), the center of the end cover (96) is provided with a through groove, and the guide block (97) protruding inward is arranged in the through groove, and the electric motor is installed in the base (90). The motor (94) and the lifting threaded rod (93) connected with the electric motor (94) are threaded and installed with an upper and lower telescopic rod (92). The guide groove (95) matched with the guide block (97), the upper end of the upper and lower telescopic rods (92) passes through the through groove and is fixed with the bottom end of the chair surface (91), so that the electric motor ( 94) The driving can drive the chair surface (91) to carry out lifting motion.

The invention discloses a device and a method for a detachable manual assembling steel column, and relates to the field of building equipment. A technical scheme is that the device comprises a steel column base used to place a steel column and a support, and the middle part of the steel column is bound with one end of a sling. The sling crosses the top of the support. A free end of the sling is held by hand of a constructor. The steel column base is fixedly provided with a base. One end of the base, far away from the support, is hinged with one end of a connecting component. The other end of the connecting component is fixedly connected with the lower outer side of the steel column. An included angle between the side surface of steel column, facing the steel column, and a horizontal planeis larger than or equal to 30 DEG and is smaller than or equal to 90 DEG. Beneficial effects are that the structure connection form is used in the device, and the device is suitable for assembly of steel columns in different specifications and shapes. The steel column is hinged and connected with the base through the connecting component. Using the structure ensures structural mechanical properties of a connection position, and related standards and use requirement are satisfied.

An electric lift seat, comprising: a seat surface (91), a base (90), a housing (3) fixedly mounted on the base (90), and an end cover arranged at the upper end of the housing (3) (96), the center of the end cover (96) is provided with a through groove, and the guide block (97) protruding inward is arranged in the through groove, and the electric motor (94) is installed in the base (90) ), and the upper and lower telescopic rods (92) are threaded on the lifting threaded rod (93) connected with the electric motor (94). (97) matching guide groove (95), the upper end of the upper and lower telescopic rods (92) passes through the through groove and is fixed with the bottom end of the chair surface (91), so as to be driven by the electric motor (94) It can drive the chair surface (91) to carry out lifting motion.

The invention discloses a motor capable of adjusting any arc surface of a terminal box through a rubber pad. The motor comprises a motor shell, a motor rubber pad and a motor terminal box, wherein themotor shell is cylindrical, the motor terminal box comprises a round angle rectangular panel and a wire box with a right-angled triangular section, the slope of the wire box is connected with the panel, the right-angled surface of the wire box is connected with the motor rubber pad, the edge of the right-angled surface of the wire box is provided with a group of opposite parallel chutes, a groupof opposite round angle rectangular holes is arranged in the center of the right-angled surface of the wire box, one side of the motor rubber pad is a plane fitted with the right-angled surface of thewire box, the other side thereof is an arc surface fitted with the motor shell, and two sides of the motor rubber pad are provided with insertion sheets fitted with the chutes. The rubber material helps changing the angle of the arc due to the elasticity, so as to adjust the arc surface, thereby being suitable for various motors, and reducing production cost.

The invention relates to an afforestation tool for a region of a difficult-site type. The afforestation tool comprises a handle, a nursery-grown plant root pitting device, a digging device and a locating device, wherein the two ends of the handle separately comprise a first end and a second end, the nursery-grown plant root pitting device is detachably connected to the first end of the handle, and the middle part of the digging device is rotatably connected to the second end of the handle; and the locating device is mounted on the handle and is used for locating the digging device when the digging device is rotated to a preset position. According to the afforestation tool, the nursery-grown plant root pitting device and the digging device are separately arranged at the two ends of the handle, so that the afforestation tool has a pitting function and also has a digging function, the digging of nursery-grown plant planting platforms and planting holes in slopes of arsenic rock is facilitated, and the survival rate and working efficiency of afforestation are increased.

The invention discloses a storage cabinet structure which comprises a storage cabinet rack, wherein a holding cavity which passes through front and back is formed in the middle point of the storage cabinet rack; a holding plate is arranged on the lower end surface of the holding cavity; a plurality groups of drawing boxes are distributed at equal intervals up, down, left and right at the lower end of the holding plate; a plurality groups of hung cabinets are arranged at the upper end of the holding cavity; handles are respectively arranged at the hung cabinets and the front end surfaces of the drawing boxes; a rollover prevention device is arranged on the upper side of the hung cabinets in a storage cabinet rack top base; the rollover prevention device comprises a fixing rack which is fixedly mounted in a holding well and a left fastening arm and a right fastening arm which are moveably mounted in sinking grooves in the rear end of the storage cabinet rack top base in a left and right symmetric manner; a guide groove which extends front and back and is communicated with the sinking grooves is further formed in the storage cabinet top base; a guide rod is mounted inside the guide groove in a sliding manner. The storage cabinet structure is simple in structure, convenient to use, stable to operate and high in security.

The invention relates to a top drive sliding variable end bending of drilling well, which mainly solves the problem that structures of top drive variable end bending and drilling bar shackle are complicated and fussy. It is characterized in that it comprises manual preventer (1); ring step is set at the lower end of manual preventer (1); sliding sleeve (3) is connected with the lower end of manual preventer (1); variable end bending (4) is connected in the step hole under the sliding sleeve (3) by spline; sealing ring (5) is set in the ring concave groove at the upper part of spline of variable end bending (4); sealing ring (5) is set in the ring concave groove in the hole at the lower end of sliding sleeve (2). The invention is provided with simple structure, simple operation and damping action.