37results about How to "Easy to route pipes" patented technology

The invention provides a front and rear axle same-direction steering method of a 4X4 electromechanical liquid all-wheel steering system. The method is characterized in that a first connector oil way and a third connector oil way in a rear axle steering integrated valve set are smooth, a second connector oil way and a fourth connector oil way in the rear axle steering integrated valve set are smooth, a rod cavity of an unlocking oil cylinder is filled with oil, and a mechanical lock is driven to rotate upwards around a rotating shaft to complete unlocking; a controller makes a two-position two-way electromagnetic valve and a valve be powered on; pressure buildup of a rear axle steering hydraulic cylinder is realized; when a driver turns a steering wheel, a steering wheel angle sensor sendsa steering wheel angle signal to the steering controller; a control system calculates target displacement of the rear axle steering hydraulic cylinder, accurately achieves a displacement stroke of therear axle steering hydraulic cylinder by controlling a current of a three-position four-way proportional reversing valve, pushes a left steering rocker arm to rotate through a ball pin, and drives the rear axle steering rod system to achieve the same-direction steering of a rear axle along with a front axle. A brand-new calculation mode of a piston telescopic target displacement value of the rearaxle steering hydraulic cylinder is researched and developed, and the piston telescopic target displacement value of the rear axle steering hydraulic cylinder is accurately calculated.

The invention provides a front axle steering method of a 4X4 electromechanical liquid all-wheel steering system. The method is characterized in that a driver turns a steering wheel, and a steering angle signal of the steering wheel is sent to a steering controller; and a control system makes a two-position two-way electromagnetic valve be powered off according to a ''front axle steering'' controlstrategy, and meanwhile makes a first connector P and a second connector T in a rear axle steering integrated valve set be unblocked so that an unlocking oil cylinder is unloaded, an unlocking springdrives a mechanical lock to complete locking and be in a locked state, and a rear axle is ensured to be located in the middle and does not participate in steering. The front axle steering method of the 4X4 electromechanical liquid all-wheel steering system has safe and reliable performance, safety and stability of the system are greatly improved, and a system design is stable and reliable.

The invention provides a front and rear axle reverse steering method of a 4X4 electromechanical liquid all-wheel steering system. The method is characterized in that a first connector oil way and a third connector oil way in a rear axle steering integrated valve set are smooth, a second connector oil way and a fourth connector oil way in the rear axle steering integrated valve set are smooth, a rod cavity of an unlocking oil cylinder is filled with oil, and a mechanical lock is driven to rotate upwards around a rotating shaft to complete unlocking; a controller makes a two-position two-way electromagnetic valve and a valve be powered on; pressure buildup of the rear axle steering hydraulic cylinder is realized; when a driver turns a steering wheel, a steering wheel angle sensor sends a steering wheel angle signal to a steering controller; and a control system calculates the target displacement of the rear axle steering hydraulic cylinder, accurately achieves a displacement stroke of the rear axle steering hydraulic cylinder by controlling a current of a three-position four-way proportional reversing valve, pushes a left steering rocker arm to rotate through a ball pin, and drives the rear axle steering rod system to achieve reverse steering of a rear axle along with a front axle. The reverse steering method provided in the invention has safe and reliable performance, safety andstability of the system are greatly improved, and a system design is stable and reliable.

The invention provides a rear axle steering hydraulic cylinder assembly which comprises a cylinder barrel, a piston rod, a ball pin, a hoop and an oil cylinder displacement sensor and is provided witha first connector and a second connector which are connected with a fifth connector and a sixth connector of a rear axle steering integrated valve bank through oil pipes respectively. An oil cylinderdisplacement sensor (35) is mounted in the cylinder barrel; one end of a rear axle steering hydraulic cylinder assembly (6) is connected with a vehicle body auxiliary seat through a knuckle bearing;the other end is connected with a left swing arm (70) of a rear axle steering rod system (10) through a ball head (36) so that the rear axle steering hydraulic cylinder assembly (6) is fixed; and thefirst connector (34) of an oil way on an upper portion of the rear axle steering hydraulic cylinder assembly (6) is connected with the fifth connector (8-A) of the rear axle steering integrated valvebank (8), and the second connector (33) of the oil way on the upper portion of the rear axle steering hydraulic cylinder assembly (6) is connected with the sixth connector (8-B) of the rear axle steering integrated valve bank (8). Stretching and retracting of the rear axle steering hydraulic cylinder along with target displacement can be accurately controlled, and closed-loop control of the steering hydraulic cylinder and steering wheel control is achieved.

Disclosed is a prestressed concrete on-site pouring hollow slab filled with light material combined unit, which comprises light material combined unit, upper layer reinforcing steel bar, lower layer reinforcing steel bar, tendon, blind beam reinforcing steel bar and concrete. The light material combined unit consists of light tubes and connection bar, which is arranged between the upper layer reinforcing steel bar and the lower layer reinforcing steel bar, the combined unit tubes is in the same direction with the bigger bending moment within the slab, The blind beam is arranged at intervals of a certain distances, in which the tendon is centralized laid. Said on-site pouring slab has the advantages of both the prestressed structure and the hollow slab structure, has high hollow percentage, implements one time concrete pouring moulding, is suitable not only for one-way slab, but also for two-way slab. The slab has big span, light weight, good heat and sound insulation effects, good reliability, shock resistance and crack resistance.

The invention provides a 4X4 electromechanical hydraulic all-wheel steering system, the system includes a steering wheel and a steering gear assembly, a front axle steering oil tank assembly, a front axle steering pump, a rear axle steering oil tank assembly, and a front axle steering rod system, rear axle steering hydraulic cylinder assembly, steering return lock mechanism assembly, rear axle steering integrated valve group, all-wheel steering controller assembly, rear axle steering rod system, rear axle electric steering pump assembly, steering wheel and The steering gear assembly is connected with the steering linkage of the front axle. The present invention has developed a brand-new electromechanical hydraulic steering system. The all-wheel steering system with this structure can conveniently switch between the three modes, and can realize the closed-loop control of the steering hydraulic cylinder and the steering wheel and the passive active return of the steering axle and rigidity. The unlocking and locking control of the locking device has many advantages. In addition, the hydraulic pressure source of the front and rear axles is independent, and the system is safe and reliable.

The invention discloses a fireless returning device for an adjustable locomotive. The fireless returning device comprises a valve body, a horizontal channel is formed in the valve body, one end of the channel is provided with a joint, and the other end of the channel is provided with a choke plug. A filter element, a pressure regulating valve assembly and a one-way valve assembly are sequentially mounted in the channel in the direction from the joint to the choke plug. The outlet pressure of the fireless returning device can be freely adjusted according to demands, the demands for fireless returning pressure set values of railways in different nations are met, pressure values can be visibly read on the valve body, and convenience and quickness are achieved. The structure is compact, occupied space and the number of middle connecting pieces are reduced, tube layout of the locomotive is facilitated, and the cost is lowered. The fireless returning device is widely applied, and can be applied to other various kinds of air wind equipment in which filtering and decompression are needed by changing the choke plug.

The invention relates to the technical field of test equipment and particularly provides a steel tube pressure test sealing apparatus and a pressure test apparatus therewith for pressure test on multiple tubes. The sealing apparatus includes a first sealing head which includes a sealing base and a sealing ring. The sealing ring is installed in the sealing base. The sealing base is provided with a tube end inserting hole connected to an inner hole in the sealing ring. The sealing base is provided with a path, which is connected to the tube end inserting hole and the inner hole in the sealing ring and is introduced out from the sealing base. The sealing apparatus also includes an adjustment base being connected to the first sealing heat with a piston. The sealing apparatus conveniently adapts pressure test in steel tubes in different lengths, when being used in the pressure test on multiple tubes, at least two sets of the tube end pressure test sealing apparatus are arranged in parallel. The test sealing apparatus is more convenient to adjust the steel tubes in different lengths. The pressure test apparatus is more reasonable and compact in structure, achieves self-adaptive adjustment and is higher in efficiency.

The invention provides a steering return locking mechanism assembly, which includes an unlocking oil cylinder, an unlocking spring, a return spring, a mechanical lock assembly, a rotating pin, a return cylinder, a telescopic cylinder, Telescopic shaft, left support fixing nut, left spring support assembly, right spring support assembly, retaining ring between cylinders, pin shaft, unlocking spring support, unlocking cylinder upper bracket, unlocking cylinder lower bracket, ball pin , lock sensor, unlock sensor. The present invention has developed a brand-new steering return locking mechanism assembly, which can complete the follow-up expansion and contraction with the rear axle steering hydraulic cylinder when the rear axle is turning normally; when the rear axle is not turning, it can keep the steering rod of the rear axle in the middle The position is mechanically maintained and rigidly locked; when the all-wheel steering system has an electrical or hydraulic failure, it can realize passive active return and complete rigid lock, which greatly improves the reliability of the whole set of all-wheel steering device.