34results about How to "Change does not happen" patented technology

The invention discloses a dynamic balance electric control valve and belongs to a flow control valve. The technical problem that the conventional dynamic balance valve is complex in structure, low in control precision and narrow in application range is solved. The dynamic balance electric control valve comprises a valve body with an inlet flow channel and an outlet flow channel, wherein an automatic flow balancing device and a flow regulation assembly are arranged on the valve body; the automatic flow balancing device comprises a balance flow channel; a sliding valve core and an elastic part are arranged in the balance flow channel; and the sliding valve core slides in the balance flow channel by utilizing fluid pressure and controls the fluid flow of the balance flow channel. The dynamic balance electric control valve in the embodiment is applied to heating and air-conditioning waterway pipe network systems.

The invention provides an automatic loading and unloading device for a digital controlled lathe and relates to the technical field of machine manufacturing equipment. The device is characterized in that a material distributing cylinder, a material distributing groove and a hopper frame are arranged on a base, wherein the material distributing cylinder is in driving connection with the material distributing groove, two hoppers are fixed on the hopper frame, a guiding groove is vertically formed in each hopper, and an auxiliary blanking device is arranged between the two hoppers; the base is fixed with a feeding cylinder support, a feeding cylinder is fixed on the feeding cylinder support and connected with a loading cylinder support through threads, a loading cylinder, a charging barrel anda positioning bolt are fixed on the loading cylinder support, and the loading cylinder is in driving connection with the charging barrel. The automatic loading and unloading device can feed bar materials with different diameters and lengths, automation of the production process is improved, labor intensity of a worker is reduced, the mechanical structure is simpler than a manipulator, and the device occupies a small area and is low in production cost and acquisition cost.

The invention discloses an amplitude change compensation control method and a system and a movable arm tower crane. In the amplitude change compensation control method, a driver can select a fixed-height amplitude change mode through a human-computer interface, and operates the amplitude change in the mode; a control system calculates deformations of a whole machine and an arm frame according to acquired angle change values of a large arm and weights of lifted heavy objects in the movable arm tower crane and internal preset data; and the lifting speed is controlled in real time according to the parameters along with amplitude change actions to guarantee no change of heights of the heavy objects in the amplitude change process. The driver only needs to select the fixed-height amplitude change mode, and then, only needs to operate an amplitude change mechanism, so that the heavy objects can be kept at the same height for horizontal movement, and the operation difficulty and intensity of the driver are greatly reduced; and when the driver leaves from a seat for a long time, the control system can perform automatic identification and corresponding control to prevent dangers.

The invention relates to a sewing machine capable of easily adjusting the supply amount of a lubricating oil to a shuttle mechanism. The lubricating oil is stored in a fuel tank. The lubricating oil in the fuel tank is guided to a lubricating oil feeding opening of the shuttle mechanism by an oil core based on the capillary phenomenon. A support mechanism supports the fuel tank to move up and down relative to the shuttle mechanism. The supply amount of the lubricating oil to the shuttle mechanism is dependent on the height difference of the shuttle mechanism and the fuel tank. An operator changes the up-and-down position of the fuel tank to adjust the supply amount of the lubricating oil to the shuttle mechanism. The operator can easily adjust the upply amount of the lubricating oil to the shuttle mechanism.

The invention discloses a multi-terminal information inquiry method and system. The method comprises the following steps that multiple nodes with a first presupposition sequence are generated according to an inquiry period of the terminal to be inquired; by utilizing any node as current node in the multiple nodes, a node inquiry flow path on the current node and the node after the current node are successively actuated according to the first presupposition sequence; and when inquiring the last node according to the first presupposition sequence, the first node is used as the current node, the successive node inquiry step on the current node and the node after the current node is actuated according to the first presupposition sequence, and until the information inquiry of the terminal to be inquired is stopped. According to the multi-terminal information inquiry method and system, the terminal corresponding to identification in the current position unit in the node of the node inquiring process is stored to inquire, and a problem that the confliction of multi-terminal inquiry is avoided.

The invention relates to the technical field of anticorrosive coating, and particularly discloses a pH regulator, water-based steel structure anticorrosive coating containing the pH regulator and capable of preventing weld joint flash rust and a preparation method. The pH regulator is prepared from DMAE, water and a strong alkali aqueous solution of active metal according to a mass ratio of (1-5):(1-2):(0.1-0.5). The water-based steel structure anticorrosive coating is prepared from the following raw materials in parts by weight: 30-40 parts of polymer emulsion, 15-25 parts of an antirust filler, 10-20 parts of talcum powder, 0.1-1 part of an anti-flash-rust assistant, 0.1-1.5 parts of the pH regulator and 20-30 parts of water. The water-based steel structure anticorrosive coating not onlycan prevent flash rust of a common steel structure main body, but also has a remarkable inhibition effect on the flash rust at a weld joint, can effectively inhibit the flash rust of the weld joint,thoroughly solves the problem of rapid corrosion in the use process of the water-based coating, and is good in long-term storage stability.

The invention discloses a distributed consistent search result random sorting method, which comprises the following steps of: preparing search data, and generating an index primary key identifier; initializing global parameters for controlling random sorting processing; a search thread is started, and a random time factor is initialized; calculating an initial score and a random score for the matched product data; calculating the sum of the initial score and the random score as the total score of the product data; the method is not influenced by a distributed environment and a network environment, the consistency of search results in the distributed environment is supported, and the effects of guaranteeing the fairness of product search and improving the user experience of product retrieval of a user are achieved.