34results about How to "Improve mud performance" patented technology

A tire of the present invention can exhibit good mud path performance, wet performance, and steering stability performance on a dry road surface. A tire 1 comprises a tread portion 2 comprising a plurality of blocks 5. In a development view of the tread portion 2, at least one of the blocks 5 include a block body 6 arranged between lateral grooves 4 and a protruding portion 7 protruding from the block body 6 toward a main groove 3. The protruding portion 7 comprises a first part 8 having a ground contacting surface (8a) extending continuously from the block body 6 and a second part 9 arrangedcloser to the main groove 3 than the first part 8 and on an inner side of the ground contacting surface (8a) in a tire radial direction.

Provided is a pneumatic tire that is suitable as a tire for unpaved-road travel, and that has improved travel performance on unpaved roads and wear-resistant performance. Formed in a tread part 1 area plurality of longitudinal grooves 11 extending in a tire circumference direction, a plurality of transverse grooves 12 extending in a tire width direction, and a plurality of blocks 13 divided by the longitudinal grooves 11 and the transverse grooves 12. Cut-away parts 20 are formed in each of the longitudinal groove 11-facing portions of a pair of blocks 13 that are adjacent on either side of any longitudinal groove 11. The cut-away parts 20 are caused to face each other across the longitudinal groove 11. The cut-away width Wc and cut-away depth Dc of the cut-away parts 20 are greater toward the center along the extension direction of the longitudinal groove 11 than toward the outer side along the extension direction.

Provided is a pneumatic tire capable of improving noise performance and wet performance while maintaining steering stability. Disclosed is a pneumatic tire wherein: center blocks 20 and shoulder blocks 21 are partitioned by a circumferential-direction groove 10 extending in the tire circumferential direction, a plurality of inner slanted grooves 11 that communicate with the circumferential-direction groove 10 while slanting in one direction with respect to the tire circumferential direction, and a plurality of outer slanted grooves 12 that communicate with the inner slanted grooves 11 while slanting in another direction with respect to the tire circumferential direction; the pitch of each repeating element consisting of these grooves and blocks changes along the tire circumferential direction; the circumferential-direction groove 10 is constituted by a plurality of wide-width parts 10A and a plurality of narrow-width parts 10B arranged alternately in the tire circumferential direction;the inner slanted grooves 11 communicate with the wide-width parts 10A; and, the smaller the pitch of the repeating element is, the smaller the slanting angle theta formed between the tire circumferential direction and an imaginary line L connecting the respective centers of opening ends of a pair of said inner slanted grooves 11, 11 that is in communication with said wide-width part 10A.

The invention relates to a grouting construction method of coke oven hot roof mud. The construction method comprises the following steps: (1) assembling a mud fabrication system; (2) preparing the mud; (3) continuing to stew the mud in a second mud mixer, and separating out large-particle impurities, so as to form final casting mud. The casting mud is directly conveyed to the required part of the coke oven hot roof through a second mud delivery pump and a mud pressure uniform distributor, and directly grouted into a coke oven gap, and the coke oven hot roof mud is grouted and constructed. The construction method disclosed by the invention is simple, low in cost, high in efficiency, free of pollution, and good in construction mud performance, and the labor intensity of a worker is effectively reduced.

The invention relates to a pneumatic tire which improves mud road performance and durability. A plurality of tire shoulder pattern blocks (6) of the pneumatic tire (1) are arranged along a circumferential direction of the tire. Each tire shoulder pattern block (6) has a side face (11) extending from a grounding end (6t) of a tire axial outer side of a tread (16) towards a tire radial inner side. In a tire meridian section containing a tire rotating shaft under a normal state, the side face (11) includes a first arc part (12) having a concave arc-shaped profile, the concave arc shape has a center in a position closer to the tire axial outer side than the ground end (6t) and the radius of curvature is 50% to 100% of a tread grounding width (TW). A tire radial distance (Ha) between the outermost end (2e) in a tire radial direction of a tread (2a) of a tread part (2) and an inner end (12i) of the tire radial direction of a first arc part (12) is 5% to 10% of a tire maximum width.

Provided is a pneumatic tire capable of improving uneven-wear resistance and driving performance on muddy road surfaces, and achieving both these properties in a balanced manner. A plurality of firstlug grooves (11) and a plurality of second lug grooves (12) shorter than the first lug grooves (11) are provided alternately along the tire circumferential direction in a shoulder region of a tread part (1). A first connection groove (21) that connects the second lug groove (12) and a tip end part of the first lug groove (11) is provided, and a second connection groove (22) that connects the firstlug groove (11) and a tip end part of the second lug groove (12) is provided. An angle THETA 1 of the first connection groove (21) is greater than an angle THETA 2 of the second connection groove (22). A tire-widthwise inner end part of each of a plurality of first shoulder blocks (31) each partitioned by the first lug groove (11), the second lug groove (12), and the first connection groove (21)is arranged closer to the tire equator CL than a tire-widthwise inner end part of each of a plurality of second shoulder blocks (32) each partitioned by the first lug groove (11), the second lug groove (12), and the second connection groove (22). Each of the first and second shoulder blocks (31, 32) is provided with a traversal groove (31a, 32a) that traverses the block while being slanted with respect to the tire circumferential direction.

The invention relates to the field of building construction, and provides a mud for retaining wall of an underground diaphragm wall of a deep and large foundation pit in a round boulder formation, which comprises the following raw materials in parts by weight: 1000 parts of water, 75-85 parts of bentonite, 3-5 parts of soda ash, and polyacrylic acid Sodium 0.5‑1.5 parts. The invention also provides a method for configuring the slurry for the retaining wall of the underground diaphragm wall of the deep and large foundation pit in the round gravel formation. The advantage of the present invention is that: the present invention adopts sodium polyacrylate to replace traditional CMC, and its slurry retaining wall performance and slurry recycling rate will be greatly improved, and at the same time, corresponding environmental pollution and material consumption are reduced; at the same time, it is prepared according to the formula of the present invention The various indexes of the obtained mud can meet the requirements of the circulating mud index, the effect of wall protection is good, and the stability of the groove wall is good.

The present invention provides a pneumatic tire in which on-road performance, off-road performance, riding comfort performance, and noise performance are improved in a balanced manner. The pneumatic tire (1) of the present invention is provided with a plurality of main grooves (3) extending continuously in a zigzag shape in the tire circumferential direction and a plurality of lateral grooves (4) extending in the tire axial direction on the tread portion (2). . The main groove (3) includes a pair of shoulder main grooves (6) arranged on both sides of the tire equator C. The lateral grooves (4) include a plurality of shoulder lateral grooves (17) extending from each shoulder main groove (6) to a tread end (Te) on the tire axially outer side. The maximum groove width W8 of the shoulder transverse groove (17) is 0.2-0.6 times of the maximum groove width W1 of the shoulder main groove (6).

A tire includes a tread portion including a main groove, a first block and a second block which are adjacent to one another in a tire axial direction through the main groove. The main groove includes first groove elements and second groove elements having groove widths smaller than that of the first groove elements. The first block includes a first ground contact surface, a first sidewall facing one of the second groove elements, a first corner portion between the first ground contact surface and the first sidewall, and a first recess being cut out the first corner portion locally. The second block includes a second ground contact surface, a second sidewall facing said one of the second groove elements, a second corner portion between the second ground contact surface and the second sidewall, and a second recess being cut out the second corner portion locally.

Provided is a pneumatic tire that is favorable for traveling on an unpaved road and shows improved traveling performance and anti-wear performance on an unpaved road. Of a plurality of blocks 13 formed in a tread portion, at least three blocks 13 that include an outermost block 13o located outermost in a tire width direction and are adjacent to each other in the tire width direction, and at leasttwo vertical grooves 11 located between these blocks 13, are arranged on a platform 15 that protrudes from a groove bottom of a horizontal groove 12, has a flat top surface, and projects to either side in a tire circumferential direction with respect to the at least three blocks 13, and a bottom raising portion 16 protruding from a groove bottom of the vertical groove 11 adjacent to the outermostblock 13o is provided on the groove bottom of the vertical groove 11, to connect the outermost block 13o to the block 13 adjacent to the outermost block 13o.

The invention discloses an experimental device for simulating the formation process of mud cake, which comprises a simulated wellbore and an invasion chamber, the simulated wellbore is respectively connected with a feeding bin and a pressurized pump, and a stirring shaft is installed at the shaft of the simulated wellbore, and the stirring shaft and Stirring motor transmission connection, an impeller is set on the stirring shaft, a window is opened on the simulated wellbore, a formation module is installed in the invasion chamber, the invasion chamber is sealed and connected to the window of the simulated wellbore, and a Filtration flow measurement device. The invention realizes mud filtration experiments under different mud types, different mud pressures, and different hydrodynamic conditions, and creates favorable conditions for studying mud cake formation rules and evaluating mud filtration and wall-building properties, and is helpful for optimizing mud performance , It is of great significance to protect the reservoir productivity.