10results about How to "Increase or decrease length" patented technology

The present invention discloses a universal arm and a rock drill for tunnel construction. The universal arm comprises a boom, a front support is provided at the front end of the boom, a guide rail sliding frame is rotatably provided on the front support through a first pivot, a guide rail sliding frame rotation driving oil cylinder is connected between the guide rail sliding frame and the front support; a guide rail support is rotatably provided on the guide rail sliding frame through a second pivot parallel to the bearing surface of the front support, and a flip driving device for driving the guide rail support to flip is provided between the guide rail support and the guide rail sliding frame rotation driving oil cylinder. The rock drill for tunnel construction is composed of a universal arm and a step-type rock drill provided on the universal arm. The beneficial effects of the present invention are that the universal arm has a simple structure, occupies less space, is light in weight, and has reliable functions. The rock drill for tunnel construction gives full play to the technical advantages of the step-type rock drill and the universal arm, provides guarantee for the mechanized operation of tunnel construction, has high construction efficiency, and low construction cost.

This utility model provides a large-area high-level cleaning device for wind turbine blades, relating to the field of wind turbine blade cleaning technology. It includes a housing, brushes, and a quick-release operating rod. The lower surface of the housing has a recessed groove. Two brushes are positioned along the left and right edges of the housing, forming a suction chamber between the brushes and the groove. The upper surface of the housing has a first through-slot communicating with the suction chamber. A first fixing seat is provided on the upper surface of the housing, sealing the first through-slot. A second through-slot communicating with the first through-slot is provided on the first fixing seat. A second fixing seat is provided on one side of the upper surface of the housing. The quick-release operating rod is hinged to the second fixing seat and connected to an external wind turbine and dust collection box. The first fixing seat and the quick-release operating rod are connected via a connecting pipe. This utility model can improve the cleaning efficiency of the blades by sweeping and suctioning simultaneously, while ensuring the cleaning effect of the blades.

A joint structure of an assembled rectangular tunnel lining and an installation method thereof, comprising a tunnel section and a rectangular tunnel segment, wherein the tunnel section is formed by splicing a plurality of rectangular tunnel segments, and the radial cross-section of the tunnel section is rectangular, wherein the rectangular tunnel segment is formed by placing the end face of a rectangular tunnel segment prefabricated with a cylindrical connecting steel column hole upward, vertically, inserting a connecting steel column, adding an adhesive material into the steel column hole, and placing the end face of a rectangular tunnel segment prefabricated with a truncated cone-shaped connecting steel column hole downward, butting and assembling downward, and under the dual action of the joint and the connecting steel column, the upper and lower rectangular tunnel segments are tightly assembled into a whole. The present invention has the advantages of high on-site assembly accuracy, easy control, fast construction, small workload, small impact on the surrounding environment, and environmental protection, and can effectively reduce the construction period and cost in assembled tunnel projects.

The utility model is suitable for sewage cleaning technical field provides a mobile grid cleaner, including baffle, the baffle is provided with two groups, two groups baffle between installing fixed plate, the top of baffle installs gantry. The utility model provides a mobile grid cleaner, the grid frame is driven by second motor and makes the whole body on the support plate slide, thereby realizes the mobile cleaning of dirt, through setting up first motor drive screw rod rotation to make the grid frame lift, this setting can facilitate the dirt between the grid frame and baffle and pull out, and the connecting plate can scrape off the dirt in the gap of grid frame when the grid frame is lifted, realize the quick cleaning of grid frame, through setting up photovoltaic board charges the battery, so that the device need not to hitch up line power on, improve the flexibility that the device uses, and reach the purpose of energy saving, the length of support plate overlap can increase or decrease, convenient to use in different length's sink.

The utility model discloses a novel overwater anti-crossing guardrail floating body, which comprises an elastic plastic guardrail and a floating body component, the elastic plastic guardrail adopts a continuous multi-section sectional structure, and a plurality of sections of the elastic plastic guardrail are connected end to end and float on the water surface to form the overwater anti-crossing guardrail floating body. The floating body assembly is used for fixing the connecting positions of the multiple sections of elastic plastic guardrails and providing buoyancy and fixing positions for the elastic plastic guardrails. The device is suitable for water recreation facilities, the device is excellent in intercepting effect, impact is dispersed and absorbed through overall displacement and deformation when the device is impacted by a yacht, the good buffering and intercepting effect is achieved, and when the device is subjected to displacement and deformation due to impact, the device is fixed through the balance weight traction effect of a balance weight block and a ground anchor in the fixing assembly. The elastic plastic guardrail can automatically reset, and the fixing mode does not need to consider the water depth condition, so that the applicability is higher.

The utility model discloses an alternating-current brushless angle grinder which comprises an angle grinder body, a moving assembly is arranged on the angle grinder body, a rotating assembly is arranged in front of the moving assembly, a grinding assembly is arranged on the rotating assembly, the angle grinder further comprises a control module, and an installation groove is formed in the angle grinder body. A cylindrical structure is arranged on the front section of the angle grinder body, and the angle grinder further comprises a limiting assembly. The angle grinder can stretch out and draw back through the sliding piece and the moving piece, the length can be conveniently increased or decreased according to the using habit of a user, the handle can be adjusted according to the using habit of the user, the user can conveniently use the angle grinder for a long time, and the idler wheel is attached to the side wall of a workpiece by adjusting the length and angle of the limiting assembly. And the side wall is prevented from being damaged when the angle grinder is used.

The utility model relates to the technical field of medical detection, in particular to a magnetic particle chemiluminescence method detection reagent strip with a light-proof storage function, which comprises a detection reagent strip body, a light-proof component is arranged at the top of the detection reagent strip body, and the light-proof component comprises a light-proof film. The light shielding film is fixedly connected to the top of the detection reagent strip body. According to the magnetic particle chemiluminescence detection reagent strip with the light-proof storage function, by installing the light-proof assembly, when a detection reagent is stored, a light-proof film at the top of the detection reagent strip body can be used for covering the reagent, so that a certain light-proof effect can be achieved, and meanwhile, by means of a black plastic film in the light-proof film, the light-proof effect is good. The light-proof film is arranged in the light-proof box and can absorb certain light so as to have a good light-proof effect, and the aluminum foil in the light-proof film has excellent light-proof performance so as to block most of light, so that internal reagents can be prevented from being influenced by illumination, the accuracy of reagent detection is ensured, and the practicability of the device is improved.

The application discloses a method and device for estimating the damage effect of an explosive belt. The method comprises the following steps: obtaining the model of a current projectile to be launched, and obtaining the launch angle of the projectile to be launched in a chamber; obtaining the length of the explosive belt connected to the projectile to be launched, the distribution of the explosive in the explosive belt, the type of the explosive, and the explosion parameters of the explosive; estimating the pre-launch position of the projectile to be launched based on the model and the launch angle of the projectile to be launched; estimating the falling position of the explosive belt based on the pre-launch position; obtaining the ground state of the setting area of the falling position based on the falling position, wherein the ground state comprises the information of ground buildings and vegetation; determining the impact resistance parameters of the ground buildings and the vegetation; determining the damage effect of the explosive belt based on the falling position of the explosive belt, the explosion parameters of the explosive, and the impact resistance parameters; and outputting the information of the damage effect. The damage effect of the explosive belt is estimated in advance, so that the attack or obstacle removal effect of the explosive belt can be guaranteed.

The utility model discloses a film splitting machine for film production, which relates to the technical field of film splitting and comprises a splitting machine body, an upper power mechanism and a lower power mechanism are arranged on the back of the splitting machine body, and winding components are arranged on one side of the upper power mechanism and the upper portion of the lower power mechanism. The winding device is used for winding the cut film; the winding assembly comprises a winding roller. The sleeve winding device is reasonable in design structure, when sleeves with different lengths need to be used, the rotating knob is rotated to drive the inner rotating cylinder in the winding roller to rotate, so that the elastic mechanisms and the check blocks are driven to rotate, the two check blocks with different intervals are popped out, the intervals between the check blocks are changed, the sleeve winding device is suitable for the sleeves with different lengths, and use is convenient. And sleeves with different lengths can be conveniently fixed, so that the problems that in the prior art, the sleeves are inconvenient to limit, and when the sleeves with different widths need to be used, the sleeves are inconvenient to adjust and fix are solved.