42results about How to "Unlimited height" patented technology

The invention relates to a press key structure comprising a sliding element, a press key cap, a scissor type connecting element and a connecting structure. The press key cap is connected to the scissor type connecting element, and the connecting structure is connected to the scissor type connecting element and the sliding element. When a user wants to operate the press key structure, linked operation of the sliding element and the connecting structure can be controlled, the press key cap is enabled to be at a high position, and good pressing hand touch can be provided for the user. Via the press key structure, linked operation of the sliding element and the connecting structure can be used to lower height of the press key cap, and therefore the press key structure is enabled to have a thin shape.

The invention discloses a mobile bulk material unloading machine, which belongs to the unloading machine, and its structure includes an overturning platform and a wheel stopper. The overturning platform is embedded in the chassis of a special semi-trailer. The lower part of the rear side of the chassis is provided with moving wheels, the left and right sides of the front end of the special semi-trailer chassis are respectively provided with front outriggers, the left and right sides of the middle part are respectively provided with middle outriggers, and the left and right sides of the rear end are respectively provided with rear outriggers. The front part of the chassis of the semi-trailer is equipped with a folding ladder, and the front side of the bottom of the chassis of the special semi-trailer is provided with an inclined surface. The angle between the inclined surface and the horizontal plane is ≤5°. A hydraulic system is provided on the trailer chassis. The invention has the characteristics of being able to drive like a car, automatically unloading a truck loaded with bulk materials;

The invention relates to a pipe-bundle-builtin isothermal-shift reactor. According to the pipe-bundle-builtin isothermal-shift reactor, axial annular pipe bundles, which are builtin and are uniformly distributed in a catalyst bed layer along circumferential direction, are adopted to shift out heat of reaction, so as to realize isothermal shift; and a central pipe bundle which is built in a central pipe is adopted to preheat raw material gas entering the reactor, so as to realize the builtin of a gas-gas heat exchanger. The isothermal-shift reactor comprises a pressure-bearing shell, a catalyst basket, the axial annular pipe bundles, the central pipe and the central pipe bundle; and the axial annular pipe bundles consist of upper and lower annular pipe boxes, upper and lower annular pipe sheets and heat exchange tubes. According to the pipe-bundle-builtin isothermal-shift reactor, due to builtin pipe bundles, the manufacturing cost of equipment is effectively reduced; due to an end-part bent structure for the heat exchange tubes, the size of the pipe sheets is effectively reduced; due to a heat insulating layer laid between the pipe sheets and the high-temperature catalyst bed layer, the contact between pipe end weld spots and a bed layer high-temperature area is effectively isolated, the probability of leakage is lowered, and the reliability of equipment is improved; and the pipe-bundle-builtin isothermal-shift reactor is compact in structure, low in manufacturing cost, relatively easy in maintenance, high in reliability, complete in function and high in applicability.

The invention discloses an automatic control device for passive farmland irrigation. The automatic control device mainly comprises a water storage tank, a pressure boosting mechanism, a valve flap, a floating ball guide mechanism and a buffer supporting part, wherein the buffer supporting part comprises a buffer plate and a pair of supporting columns installed on the buffer plate; each supporting column consists of a threaded connection screw rod in a threaded sleeve; the top end of each screw rod is provided with a supporting block or a supporting ball which supports the water storage tank; the water storage tank is of a fully-sealed structure, and is formed by connecting a water storage tank bottom plate and a water storage tank shell. The automatic control device has the advantages that the lifting of a floating ball in the floating ball guide mechanism is controlled by using the depth of a water layer in a farmland, so that the action of the valve flap in the water storage tank is further driven to realize water supply or discharge; when the valve flap is closed, the floating ball is used for guiding, and finally, the valve is closed by using water pressure; under the demand of shallow water supply, good sealing can still be realized; moreover, whole or independent height adjustment can be implemented in combination with the height of the floating ball of the floating ball guide mechanism, so that the depth of water level can be freely adjusted within the scope of 1-7cm to meet the demands of different-depth water supply.

The invention relates to an article display cabinet, which includes a cabinet body. A horizontal displacement device and an article clamping device are arranged inside the cabinet body. The horizontal displacement device is arranged behind the inside of the cabinet body. There are several rows of article placement devices in the front of the cabinet, and a removal port and an entry port are provided on one side of the cabinet. The invention can realize the automatic depositing and taking out of articles.