38results about How to "Increase the force contact area" patented technology

The invention relates to a quick connection joint of a drill pipe, which is composed of an outer casing, an O-ring and an inner casing, and the inner and outer casings are sealed by an O-ring; The outer casing thread and flat groove are provided on the pipe wall, the inner casing thread, the inner casing sealing groove and the inner casing stopper with an axial stopper at the lower end are provided on the inner casing, and the inner casing thread and the outer casing thread are respectively used for Connecting the upper and lower drill pipes; the order in which the joint of the present invention is connected to the drill pipes is the lower drill pipe, the outer casing, the inner casing and the upper drill pipe. When the inner and outer casings are connected, the side contact of the inner and outer casing stoppers is formed to bear the transmission torque; the axial stopper is in contact with the end face of the outer casing stopper, so that the inner and outer casings cannot be axially pulled apart, and is used to withstand the lifting of the drill when the axial tension. The joint of the invention has the advantages of compact structure, good sealing performance, long service life, convenient and fast installation and disassembly, and is especially suitable for use on small-sized and portable geological exploration sampling drilling rigs.

The invention discloses a two-way layered shear model box device and its use method. The device includes a U-shaped layer frame, a rolling body system, a limit device and an inner liner bag. The U-shaped layer frames are vertically and equidistantly arranged in parallel. Through the interlayer rolling body system connection, the limit device is used to limit the plane torsion and vertical vibration deformation of the U-shaped frame, and the bottom frame is fixed on the vibration table. The use method includes a. assembling the rolling body system; b. assembling the model box body and fixing it on the vibrating table; c. assembling the limit device; d. laying a liner bag inside the box body and adding soil in the box body And embed the model structure; e. Vibrate in one direction; f. When the direction of vibration changes, switch the rolling bearing platform from along the direction of vibration to the direction perpendicular to the vibration, and continue the vibration test in the other direction. The invention can vibrate in two directions, has small self-weight, adjustable rigidity, simple operation, wear-resisting and durable, firm structure, and can repeat one-dimensional or two-dimensional shaking table tests.

The invention discloses a rectangular air duct steel wire rope anti-seismic support system, which comprises a lower support on which a rectangular air duct is placed, and L-shaped limiting plates are arranged on both sides of the rectangular air duct; A rubber push plate is arranged below, and a damping spring is connected between the rubber push plate and the upper bracket; the upper bracket is symmetrically provided with fixed blocks on both sides of the rubber push plate, and an L-shaped fixed block is arranged in the fixed block. Piston cavity, the side of the second piston plate away from the L-shaped piston cavity is fixedly provided with a second clamping rod; the outer side of the connector is fixedly provided with a ring plate, and the ring plate is provided with a plurality of threaded holes ; The upper bracket is symmetrically threaded with steel wire ropes. The invention provides a rectangular air duct steel wire rope anti-seismic support system with more stable support, which can uniformly limit the allowable shaking range and elastic extrusion state of the rectangular air duct, so multiple anti-seismic supports can evenly disperse the force during an earthquake, which is very It is worth promoting.

The invention relates to the technical field of rescue devices, in particular to a swamp rescue device, comprising a first mounting plate, a partition plate, a support plate, an air cushion body and a second mounting plate. A partition plate is fixedly installed in the middle, and a support plate is fixedly installed on the left end faces of the first installation plate and the second installation plate, and an air cushion body is fixedly installed between the first installation plate and the second installation plate. The main body is located on the right side of the partition plate. , a rotating rod is fixedly installed between the two support plates. The invention provides a swamp rescue device, which has a simple structure and is easy to use, greatly improves the rescue efficiency, avoids the risk of the rescuer falling into the quagmire, and does not cause harm to the rescuer, saves time and effort, and saves resources.

The invention discloses an anti-collision device for expressway vehicles. The upper horizontal guardrail belt is equidistantly opened along the length direction with upper wire rope through holes, the middle horizontal guardrail belt is equidistantly opened along the length direction with middle steel wire rope through holes, and the lower horizontal guardrail belt is equidistantly opened along the length direction. The lower steel wire rope holes are equidistant along the length direction, and the upper, middle, and lower wire rope holes are dislocated; the upper, middle, and lower horizontal guardrail belts are connected by the first buffer wire rope and the second buffer wire rope. The wire ropes respectively pass through the corresponding wire rope holes on the upper, middle and lower horizontal guardrail belts in turn. In this case, the first and second buffer wire ropes are arranged in a serpentine structure, which facilitates the positioning of the first and second buffer wire ropes, thereby effectively absorbing the energy of high-speed collisions, and the three horizontal guardrails + the first and second buffer wire ropes + The first and second buffer wire ropes are arranged in a serpentine structure + the first and second buffer wire ropes pass through the same wire rope hole on the middle level guardrail belt to organically cooperate.

Provided is a drill bit used for a high air-pressure down-the-hole drill hammer with the capability of penetrating reinforced concrete. The drill bit comprises a drill bit body, air exhaust holes and slag removing holes. The key point of the structure is characterized in that elongated tooth heads are inlaid on a panel of a head of the drill bit body. The drill bit used for the high air-pressure down-the-hole drill hammer with the capability of penetrating reinforced concrete has following advantages: by changing the distribution of the tooth heads of the drill bit body, the point distribution structure of the tooth heads is changed to be elongated distribution structure for alloy tooth heads; tooth roots are used to be small-diameter blind holes and are changed to be elongated tooth grooves; elongated alloy tooth heads are embedded into the drill bit body so that heat treatment technology becomes easy; welding-on reliability is greatly improved; due to the elongated structure of the alloy tooth heads of the drill bit body, the contact area for acting force is increased; force is applied by lines instead of points; and under effect of high frequency impact, panels of the alloy tooth heads of the drill bit body can operate in the knife-cutting mode in order to generate plastic deformation by force. The drill bit used for the high air-pressure down-the-hole drill hammer with the capability of penetrating reinforced concrete has following beneficial effects: the speed for penetrating reinforced steel bar is 20 times as high as original speed; and the drill bit has 10 or 20-fold service lifetime as compared with an ordinary drill bit.

The application of the invention discloses a suspension type anchor puller and its application and construction method. The suspension type anchor puller includes a first fixing part, which is detachably connected with the transverse diaphragm of the steel box girder through a pull rod, including the first fixing plate; a second fixing part, connected with the steel strand used for pushing construction, including The second fixing plate; the fixing groove, which is arranged between the first fixing piece and the second fixing piece, is used to fix the bottom plate of the steel box girder; the first fixing plate and the steel box girder The partition plate is correspondingly provided with a first structural hole, and the tie rod passes through the first structural hole and penetrates through the transverse partition connecting the first fixed plate and the steel box girder; the second fixed plate is provided with a The second structural hole. The application of the present invention solves the technical problem that the bottom plate is easily deformed due to direct contact with the hoisting equipment during the hoisting process, which leads to the need for time-consuming correction work in the later stage, which increases the overall construction difficulty and lengthens the construction period.

The invention discloses a water lubrication screw rod compressor bearing structure which mainly comprises a female rotor, a male rotor, four water lubrication radial sliding bearings and a thrust sliding bearing. The thrust sliding bearing is located at the shaft end of the female rotor and the male rotor on the air suction side of a compressor. The thrust sliding bearing is located on the air suction side of the compressor, since the whole compression process approximates to constant temperature compression, the air suction and exhaust temperature difference of the compressor is within 10 DEG C, accordingly, the thrust sliding bearing does not affect the rotor exhaust end face gap when installed on the air suction side of the compressor, meanwhile, the stress contact area of the thrust sliding bearing can be greatly enlarged, the thrust bearing face specific pressure is reduced, the service life of the water lubrication thrust sliding bearing is remarkably prolonged, and the reliability of the water lubrication thrust sliding bearing is remarkably improved. The installation gap of the female rotor and the male robot is convenient to adjust, the cooling and lubrication conditions of the thrust sliding bearing are improved, and the whole assembly and later-period maintenance work efficiency of the compressor can be improved.