Jiangsu Hengli Hydraulic Technology Co., Ltd.

Jiangsu Hengli Hydraulic Co., Ltd

Jiangsu Trautec Medical Technology Co., Ltd.

Jiangsu Hengli Highpressure Oil Cylinder Co., Ltd.

Liping Wang

Hongguang Liu

Qiang Lu

Zhan Chen

Jiajia Li

Song Qian

Guoliang Zhang

Junxiang Han

Pengfei Cheng

Huimin Liu

Zhonghua Zhou

Wangbo Yuan

Chenming Qian

Wenwen Jiang

Guohe Huang

Caifu Yuan

Li Zhai

Liang Ha

Jing Jia

Yanyan Liu

Lei Wei

Dachao Lin

Haiming Hua

Tong Li

A recombinant collagen and a preparation method and use thereof, and in particular, a full-length collagen α1 chain produced through recombinant expression, and a preparation method and use thereof are provided. When a variant (which is denoted as α1 (I) M1) of a human type I collagen α1 chain (α1 (I) chain) and a variant (which is denoted as α1 (II) M6) of a human type II collagen α1 chain (α1 (II) chain) constructed in the present disclosure are produced through recombinant expression in, a main degradation product (a main degradation band) in substantially the same proportion as a target product (a target band) of a full-length α1 chain occurring during the recombinant expression of native full-length α1 (I) chain and α1 (II) chain is eliminated, and a yield of the target product is improved.

Recombinant collagen and preparation method and use thereof

A hydraulic multi-way valve with independent oil-port control, includes a multi-way valve body, an A valve core and a B valve core. The multi-way valve body has an A oil port and a B oil port, and includes an A cavity and a B cavity independent from each other therein. The A oil port, a P high-pressure oil port and a T high-pressure oil port are all in communication with the A cavity, the B oil port, the P high-pressure oil port and the T high-pressure oil port are all in communication with the B cavity. The A valve core is arranged in the A cavity, and the B valve core is arranged in the B cavity.

Hydraulic multi-way valve with independent oil-port control, and control method therefor

A recombinant human type XVII collagen consists of an amino acid sequence shown in (A)or includes the amino acid sequence shown in (A), where A is a sequence set forth in SEQ ID NO: 2, a sequence undergoing an amino acid modification to a predetermined extent based on SEQ ID NO: 2, or a sequence that has more than 80% homology with SEQ ID NO: 2; n is an integer greater than or equal to 1; and A represents a basic unit, and when there are two or more basic units, the two or more basic units are identical or different and are directly connected in tandem through a peptide bond. In the present disclosure, it is confirmed that the recombinant human type XVII collagen can undergo efficient secretory and soluble expression in eukaryotic host cells such as().

Recombinant human type XVII collagen, and preparation method and use thereof

A regeneration control hydraulic system for an excavator, including at least one hydraulic pump, an actuator, a regeneration oil path, and a regeneration cut-off oil path. The regeneration oil path is configured to send a return oil as a regeneration oil to a cavity having a negative pressure of the actuator. The regeneration oil path is provided with a regeneration valve and a first control valve. The first control valve is configured to control the regeneration oil to enter the cavity having the negative pressure of the actuator when a working device of the excavator retracts inwards, or to control the oil to be discharged from the actuator to the regeneration cut-off oil path when the working device swings outwards. The regeneration cut-off oil path is configured to send the regeneration oil passing through the regeneration valve or the oil discharged from the actuator to other destinations.

Regeneration control hydraulic system

A hydraulic apparatus based on a confluence control mode includes a load sensing unit provided with first and second reversing valves, and a throttle governing unit provided with a fourth reversing valve. A confluence valve and a one-way valve, which communicate with the load sensing unit and the throttle governing unit, are arranged on a parallel oil path arranged in parallel with the fourth reversing valve. The confluence valve includes a confluence channel that controls opening and closing of the parallel oil path to shunt fluid of the throttle governing unit to the load sensing unit. A first pilot pressure acting on the first reversing valve and a second pilot pressure acting on the second reversing valve act on the confluence valve independently or simultaneously to change a position of the confluence channel, thus implementing reversing of the confluence valve.

Hydraulic apparatus based on confluence control mode

Disclosed is an energy-recycling hydraulic control main valve, which is provided with end covers, a valve core, a left one-way valve and a right one-way valve; the left one-way valve is composed of a left valve seat, a left cone valve core and a left spring; a conical surface of the left cone valve core is closely attached to a left conical surface of the valve core by the spring force; the right one-way valve is composed of a right valve seat, a right cone valve core and a right spring; and a conical surface of the right cone valve core is closely attached to a right conical surface of the valve core by spring force. The hydraulic main control valve can not only limit the falling speed of a piston, but use the potential energy generated by the gravity action on the piston, thereby achieving energy recycling.

Energy-recycling hydraulic control main valve

A pressure compensation valve comprises a valve body, a valve sleeve fixedly mounted on the valve body, and a spool disposed in a valve hole of the valve body and capable of moving. The pressure compensation valve can change the pressure compensation characteristic, that is, the pressure compensation valve can change the difficult degree of the pressurized oil liquid flowing by changing an effective pressure acting surface of the pressure compensation valve The structure is simple, requires low cost, and increases the utilization rate of a product.

Pressure compensation valve

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Changzhou, China

Liping Wang