35results about How to "Prevent lateral swing" patented technology

The invention relates to the technical field of printing equipment and discloses a printing device. The printing device comprises a printing roller and a grooved wheel mechanism. The grooved wheel mechanism comprises a grooved wheel and a rotating wheel. The end face of the grooved wheel is connected with an ink guide roller, and the ink guide roller is fixed to the printing roller. The ink guideroller is provided with a plurality of ink guide grooves distributed uniformly, an ink cavity communicating with the ink guide grooves is formed in the printing roller, and the outer surface of the printing roller is provided with ink outlet holes communicating with the ink cavity. The grooved wheel is provided with a plurality of clamping grooves, the number of the clamping grooves is equal to the number of the ink guide grooves, an opening of the side portion of each clamping groove is in sliding connection with a sliding plate for sealing the opening, the sliding plates can slide in the radial direction of the grooved wheel, a cavity is formed between each sliding plate and the groove wall of the corresponding clamping groove in an enclosed mode, a piston is connected in each cavity ina sliding mode, a nozzle is connected to the end, close to the circle center of the grooved wheel, of each cavity, a pressure valve is arranged on each nozzle, and each nozzle faces the interior of the corresponding ink guide groove. The rotating wheel is provided with a clamping post. By means of the printing device, the problem that ink liquid in ink grooves is thrown out during ink feeding of existing printing rollers can be solved.

[Problem to be solved] The present invention provides a compound needle for a flatbed knitting machine in which sliding resistance can be made small and opening / closing accuracy to an aperture of a hook by a tongue can be enhanced with a simple structure. [Solution] Tongues 1a, 2a have no bent and have linear shaped portions 1b, 2b provided at the rear side of the tongues 1a, 2a, so that the blades 1, 2 have stable finishing shapes and manufacturing thereof can be easily performed. Since lower portions of the blades 1, 2 are not bent in the blade groove, sliding resistance can be made small. Shoulder portions 1c, 2c which come out of the blade groove from rear portions of the tongues 1a, 2a are bent inward between the shoulder portions 1c, 2c opposed to each other such that front ends of the shoulder portions 1c, 2c make closer to and contact with each other so as to form contacting portions 1f, 2f, therefore, a centering effect can be obtained. A space generated between the tongues 1a, 2a is kept so that resistance when the hook 3a opens between the tongues 1a, 2a can be made small and opening / closing accuracy of the hook 3a can be enhanced.

The invention relates to a dynamic sealing device for blocking a rotary blowout preventer between a drill column and a borehole in drilling of oil-gas fields. The dynamic sealing device overcomes the defects that the conventional dynamic sealing device has short service life, is quick in heat emission and is easily sintered. The invention adopts the technical scheme that: a supporting ring is arranged in a packing box, the supporting ring is provided with an oil hole b and an oil hole c, and the outer surface of the supporting ring is provided with an annular groove b; a disc spring is arranged in the supporting ring, a caulking ring is arranged at the lower part of the disc spring, and the supporting ring is arranged between the caulking ring and a pressure ring; the pressure ring is provided with an oil hole a, and a V-shaped sealing ring and a spacing ring are sequentially arranged at the lower part of the pressure ring at intervals; a packing pressure ring is arranged at the lower end of a floating ring, the packing pressure ring is fixed at the end of the packing box, and the packing pressure ring is in clearance fit with a central pipe bush; and the central pipe bush is in interference fit with a central pipe, the packing box is in interference fit with an upper shell of the blowout preventer, and lubricating oil enters an oil hole in the upper shell of the blowout preventer through a bearing. The dynamic sealing device is suitable for relatively high dynamic sealing pressure, reduces sintering of the sealing ring, has low heat emitting abrasion and long service life, and reduces the abrasion rate.

The invention discloses a horizontal bar and parallel bars for remote control teaching. A first supporting plate is welded to the top of a first support, a second supporting plate is welded to the top of a second support, the first supporting plate is connected with a first hollow column which is connected with a first locking rocker, the second supporting plate is connected with a second hollow column which is connected with a second locking rocker, a first conical balancing weight is connected with the first locking rocker through a first lifting screw, a second conical balancing weight is connected with the second locking rocker through a second lifting screw, the first locking rocker is connected with a first lifting motor and a first remote control receiver, the second locking rocker is connected with a second lifting motor and a second remote control receiver, and the second remote control receiver is electrically connected with the second lifting motor. The locking rockers are remotely controlled to adjust the balancing weights, so that the gravity center of the whole horizontal bar and parallel bars moves upward or downward to be suitable for different users, the users can take exercises stably in a balanced mode, and the teaching and exercising effect are better.

The invention discloses a forming and sealing device used for a hollow packaging machine of food. The forming and sealing device comprises a rack, a cutter sealing angle component and a bag forming component, wherein the cutter sealing angle component comprises a bracket, a first expansion link, a second expansion link, an upper fixing plate, a lower fixing plate, an upper heat sealing seat, a lower heat sealing seat, a first angle plate and a second angle plate, wherein the upper fixing plate and the lower fixing plate penetrate through the first expansion link and the second expansion link; the upper heat sealing seat is fixedly arranged on the upper fixing plate; the lower heat sealing seat is fixedly arranged on the lower fixing plate; the first angle plate and the second angle plate are positioned between the upper heat sealing seat and the lower heat sealing seat; the upper heat sealing seat and the lower heat sealing seat are driven by an air cylinder assembly installed on the bottom of the bracket; the first angle plate is driven by a first angle air cylinder sheathing the first expansion link; the second angle plate is driven by a second angle air cylinder sheathing the second expansion link; the first angle plate and the second angle plate are symmetrically arranged. According to the forming and sealing device used for the hollow packaging machine, the cutter sealing angle component can be used for carrying out continuous end surface angle and sealing on a vertical sealing square bag, so that the forming and sealing efficiency of whole package is improved so as to improve the packaging efficiency of a finished product.