5results about How to "Prevent self-slip" patented technology

The utility model discloses an anti-rotation petroleum valve, which belongs to the technical field of valves, and has the technical key points that the anti-rotation petroleum valve comprises a valve body, the valve body comprises a valve body, a valve cover, a valve seat, a valve plate and a valve rod, the top of the valve body is fixedly connected with a shell, the valve rod penetrates through the shell, the top of the shell is provided with a groove, and the valve cover is arranged in the groove. According to the valve, due to the fact that the inserting groove and the inserting block are arranged, the problem of valve autorotation caused by valve design or external factors is effectively solved, the stability of valve operation is remarkably improved, and the valve is convenient to use. And the telescopic rod and the limiting block are arranged, the amplification effect of the lever principle is utilized, large enough force is easily transmitted, the valve can be successfully started, and therefore the physical strength of workers is greatly saved.

The utility model relates to the technical field of heat exchanger fin stamping dies, and discloses a fin stamping device with a replaceable die core, which comprises a lower die, a plurality of hydraulic cylinders are fixedly connected to the lower die, an upper die is fixedly connected to the top ends of the plurality of hydraulic cylinders, two groups of symmetrical telescopic rods are arranged between the upper die and the lower die, and the upper die is fixedly connected with the lower die. The upper surface of the lower mold is detachably connected with a mold plate through bolts, a core groove is formed in the upper surface of the mold plate, a mold core body is slidably connected into the core groove, and positioning grooves are formed in the four corners of the interior of the bottom of the core groove. According to the utility model, only the mold core body can be replaced, the whole mold does not need to be replaced, the replacement time is saved, the two Z-shaped rods can be moved at the same time, the time for moving the plurality of Z-shaped rods is saved, and the mold core body can be bounced for a certain distance when the mold core body is taken out.

This utility model relates to the field of office desk steel frame technology, and discloses an office desk steel frame with a position adjustment mechanism, including a base. The base is connected to a main desktop via a lifting component. An extension desktop is slidably connected to the inner wall of the main desktop. A handle is installed on the right outer wall of the extension desktop. Mounting brackets are fixedly connected to the bottom of the handle on both the front and rear sides. Table legs are rotatably connected to the opposite right side of the mounting brackets. Connecting plates are rotatably connected to the top of each table leg. An eccentric plate is rotatably connected to the opposite left side of the mounting brackets. Fixing blocks are fixedly connected to the bottom left and right sides of the extension desktop. Rotating rods are rotatably connected to the inner walls of each fixing block. In this utility model, the extension desktop can slide to extend or retract as needed, flexibly adjusting the desktop space to meet the needs of various office scenarios; the coordinated adjustment between various components ensures the overall structural stability of the office desk and helps the extension function to play a better role.

The utility model relates to the technical field of semitrailers, and discloses an easy unloading type container semitrailer structure which comprises a semitrailer plate, a connecting piece and an anti-collision beam, the connecting piece is fixedly connected to one end of the semitrailer plate, and the anti-collision beam is fixedly connected to the end, away from the connecting piece, of the semitrailer plate. A plurality of rectangular grooves are formed in the inner wall of the semitrailer plate, supporting plates are fixedly connected to the positions, located on the inner walls of the rectangular grooves, of the semitrailer plate, rotating shafts are rotationally connected to the inner walls of the supporting plates, and threaded grooves are formed in shaft bodies of the rotating shafts. The sliding block provided by the utility model moves outwards or backwards to drive the stable clamping plate to move, so that the container can be quickly and stably connected and separated from the semitrailer plate, and the subsequent loading and unloading treatment of the container on the semitrailer plate by a gantry crane is facilitated.

The invention discloses a drawing device for mathematical modeling, and relates to the technical field of mathematical modeling devices.The drawing device comprises a drawing assembly, the drawing assembly comprises a drawing frame, and a mounting groove is formed in the front surface of the drawing frame. Paper can be assisted to be adsorbed on the surface of the electrostatic sticker through the electrostatic adsorption force of the electrostatic sticker, the two sides of drawing paper can be tightly clamped by the clamping plates through the magnetic adsorption effect between the magnetic adsorption plates and the magnetic adsorption blocks, so that positioning of the drawing paper is completed, and after a basic pattern is drawn, the transparent drawing board is driven to be pulled outwards by pulling an iron handle, so that the drawing paper can be conveniently positioned. The transparent drawing board is rolled in the initial state, when the transparent drawing board is completely pulled out, the rolling reed is also in the unfolded state, drawing is facilitated, the same basic pattern does not need to be repeatedly drawn, after each time of drawing is completed, the camera is started, the modeled drawing is shot, and therefore storage of the drawing is achieved.