1590 results about "Cement slurry" patented technology

The invention provides a cement paste system with high strength, elasticity and toughness and application of the cement paste system in deep coal bed gas horizontal well cementation, and the cement paste system is prepared from the following raw materials in parts by mass: 40-70 parts of oil well cement, 13-40 parts of fly ash, 15-45 parts of slag, 5.0-20.0 parts of water-based organic silicon resin, 0.1-0.5 part of ultra-high performance polyethylene fiber, 3.0-8.0 parts of calcium oxide and 2.0-5.0 parts of calcium sulfate whisker. 1.0-8.0 parts of nano silicon dioxide, 1.0-6.0 parts of a fluid loss agent, 0.5-2.0 parts of a drag reducer, 0.2-1 part of a defoaming agent and 50-80 parts of water. The cement paste system disclosed by the invention has the characteristics of remarkable low-temperature quick setting and high early strength, also has the advantages of low water loss, controllable thickening, simple preparation operation and the like, and set cement is high in compressive strength, high in breaking strength and very excellent in elastic and tough mechanical properties.

According to the intelligent control method and system for the double-wheel milling and deep stirring equipment, geological data of a construction area are obtained through preset stratum detection equipment, geological data corresponding to a construction groove section are determined, and the tunneling speed is intelligently adjusted in combination with the milling wheel torque monitored in real time and the current tunneling depth. According to the method, speed adjustment is carried out according to milling wheel torque data, tunneling depth and stratum geological data, meanwhile, associated data of the tunneling depth and the speed are generated, and finally cement paste is injected into a groove section when equipment is lifted. According to the intelligent control method, construction parameters can be adaptively adjusted according to different geological conditions, the milling efficiency and precision are effectively improved, equipment abrasion is reduced, and the service life of equipment is prolonged. Through the combination of real-time data monitoring and intelligent parameter adjustment, the method realizes the accurate control and optimization of the construction process of the milling and deep stirring equipment, and provides more efficient and reliable technical support for the construction of the cement-soil continuous wall.

The invention belongs to the technical field of oil field well cementation cement paste, and particularly relates to thixotropic cement paste and a preparation method thereof. The thixotropic cement paste provided by the invention comprises water, a dry powder material, modified silica sol, a polymer fluid loss agent and other additives. The cement paste disclosed by the invention has the characteristics of viscoelasticity, no dispersion under water, thixotropy and leaking stoppage.

The invention provides high-toughness micro-expansive cement paste suitable for high-temperature well cementation. The cement paste comprises the following raw materials in parts by weight: 60-90 parts of G-grade oil well cement, 20-40 parts of an active material, 3-12 parts of a high-performance toughening agent, 3-10 parts of nano oxide, 0.5-5 parts of an expanding agent, 3-5 parts of a chemical exciting agent, 1-3 parts of a high-temperature fluid loss agent, 0.5-3 parts of a high-temperature retarder and 0.1-1 part of a dispersing agent, and 0.2-1 part by weight of a defoaming agent. By adding the active material, the high-performance toughening agent, the nano oxide and the expanding agent, the high-temperature resistance and toughness of the cement paste, the cementation quality of a cement sheath and the like are improved; through the combined action of the four components, the high-temperature resistance, toughness and surrounding rock interface cementation performance of the cement are comprehensively improved; and the cement paste is matched with other components for use, so that the cement paste has the advantages of good stability, low water loss, good rheological property and the like, is suitable for underground gas storage well cementation, can improve the well cementation quality of a stratum sealing section, and ensures the sealing integrity of a cement sheath under frequent injection and production.

The present invention relates to a sealing method for high-flow water inrush at a side wall of a foundation pit, the method comprising: calculating the minimum radius of a counter-pressure soil berm on the basis of the flow time of a liquid slurry in the counter-pressure soil berm being not less than the chemical setting time of the liquid slurry; piling up filtering sand bags on a foundation pit excavation face at a water inrush point, and constructing the counter-pressure soil berm; constructing annular grouting holes at the foundation pit on the outside of support piles and a cut-off curtain; according to the planar arrangement of the annular grouting holes, successively injecting a double-liquid slurry formed by mixing a cement slurry and sodium silicate into the annular grouting holes; inspecting the water seepage condition on the periphery of the counter-pressure soil berm until no water seepage occurs on the periphery of the counter-pressure soil berm; and excavating the counter-pressure soil berm layer by layer until the excavation reaches the pit bottom without water seepage observed at a side wall of the foundation pit. The present invention has the beneficial effects that: the size of the counter-pressure soil berm is optimally designed on the basis of the condition that the flow time of the double-liquid slurry in the soil berm is longer than the setting time, so as to solve the problems of slurry setting failure and poor grouting and sealing effects, thus saving a large amount of grouting materials, and reducing economic loss caused by secondary sealing.

The invention relates to the technical field of self-healing agents, in particular to a well cementation cement slurry self-healing agent and a preparation method thereof. The modified polyethylene glycol terephthalate polymer comprises the following components in parts by weight: 30-50 parts of modified polyethylene glycol terephthalate polymer, 2-10 parts of metal oxide, 5-15 parts of lithium silicate, 0.5-2 parts of persulfate, 0.1-1 part of bacillus subtilis and 1-5 parts of calcium lactate. The isosorbide can react with ester bonds in polyethylene glycol terephthalate, so that more hydroxyl groups are introduced, and the hydroxyl groups can interact with cement hydration products or metal oxides and lithium silicate to promote formation of new mineral phases at cracks. The generation of the new mineral phase is beneficial to filling and repairing cracks, and the self-healing of the cement paste is realized, so that the long-term stability of a well cementation structure is improved. Tetraethyl orthosilicate can cooperate with other components such as the modified polyethylene glycol terephthalate polymer to jointly promote the self-healing process of set cement.

The invention discloses a carbon dioxide injection and production well cementation cement paste and a preparation method and application thereof, the well cementation cement paste comprises the following components by weight: 95-105 parts of oil well cement, 44-48 parts of water, 4-6 parts of a polymer emulsion, 4-6 parts of a self-repairing material, 1.5-2.5 parts of a drag reducer, 0.5-1.5 parts of a fluid loss agent and 0.2-0.8 part of an antifoaming agent; wherein the polymer emulsion is an emulsion which is formed by taking methyl methacrylate, vinyl trimethoxy silane and propylene carbonate as monomers through polymerization; the self-repairing material is a microcapsule in which thiobacillus ferrooxidans thalli and bacillus amyloliquefaciens thalli are embedded. The well cementation cement paste keeps good strength and relatively low permeability in a carbon dioxide environment, is good in corrosion resistance and has self-repairing capability.

The invention relates to the technical field of well cementation materials and provides well cementation cement stone based on water-based benzoxazine resin as well as a preparation method and application of the well cementation cement stone. The well cementation cement stone is prepared from the following components in parts by mass: 400-600 parts of quartz sand, 4-6 parts of a retarder, 4-6 parts of a fluid loss agent, 1-2 parts of a suspension stabilizer, 1-2 parts of a dispersant, 4-6 parts of a high-temperature-resistant water-based benzoxazine monomer and 40-50 parts of water, and the high-temperature-resistant water-based benzoxazine monomer is prepared from a phenolic compound, primary amine and formaldehyde through Mannich reaction. Resin formed by the prepared benzoxazine monomer has improved mechanical properties at a high temperature of 150-200 DEG C, the mechanical properties and high temperature resistance of well cementation cement at a high temperature are significantly improved by filling pores of set cement and optimizing cement components, the benzoxazine monomer in a cement slurry system does not affect the fluidity of cement slurry, and the well cementation cement has a good application prospect. Meanwhile, the high-temperature strength of set cement can be remarkably enhanced, and the cement is suitable for well cementation of high-temperature deep wells.

The present invention discloses a low-temperature resistant and early-strength type alkali-free liquid accelerating agent and its preparation method, belonging to the technical field of alkali-free liquid accelerating agents. The composition includes 12-15 parts of aluminum sulfate, 2-5 parts of sodium thiocyanate embedded by β-cyclodextrin, 5-8 parts of calcium hydroxide deactivator, 3-5 parts of fiber, 5-10 parts of hydrophilic polymer substance, 3-5 parts of cationic surfactant, 6-10 parts of polyaluminum chloride, and 2-3 parts of air-entraining agent. The low-temperature resistant and early-strength type alkali-free liquid accelerating agent of the present invention can improve the frost resistance of sulfate alkali-free accelerating agents, reduce the viscosity of cement slurry, promote the hydration reaction of C3S, shorten the setting time of concrete, and improve the later strength of concrete.

The invention discloses a building cement floor construction leveling device, and relates to the technical field of cement floor construction, the building cement floor construction leveling device comprises a scraping plate, a vibration support is installed in the middle of the scraping plate, a vibration motor is installed on the vibration support, and an operation frame used for moving the leveling device is further installed on the vibration support; the lifting mechanism is installed on the rear side of the scraping plate, the lifting mechanism comprises a fixed plate and a lifting plate, and the lifting plate can do lifting motion relative to the fixed plate; the plurality of movable mounting mechanisms are mounted on the lifting plate and are used for movably mounting the vertical vibration mechanism; through cooperative arrangement of the lifting mechanism, the movable mounting mechanism and the vertical vibration mechanism, internal vibration treatment of thick cement pavement slurry can be achieved, exhaust of gas in the cement slurry is promoted, and the construction quality of leveling of the thick cement pavement can be improved in combination with scraper vibration leveling.

The invention provides a lightening composition and a well cementation cement slurry containing the same. The lightening composition comprises crushed crude pearlite, micro-silicon and fly ash.

The invention relates to the technical field of well cementation operation, in particular to an automatic well cementation multi-channel integrated control device which comprises a main valve body, a rotary valve element, a gland and a driving device, the main valve body is provided with a mounting cavity with an upward opening, the rotary valve element with the upper end located above the mounting cavity is arranged in the mounting cavity, and the rotary valve element is rotationally connected with the main valve body; the rotary valve element is provided with a communicating cavity with a downward opening, a gland fixedly installed together with the outer side of the upper end of the main valve body is arranged on the outer side of the upper portion of the rotary valve element, the rotary valve body is rotationally connected with the gland, and a driving device capable of driving the rotary valve element to rotate is arranged at the upper end of the rotary valve element. The quick switching valve is reasonable and compact in structure and convenient to use, through holes in different positions communicate with the communicating cavity by rotating the rotary valve element, and therefore quick switching of different working solutions is achieved; the forward blades and the reverse blades are arranged, so that two paths of cement paste are fully and uniformly mixed; and by arranging the station display device, the current working state is visually displayed, and the device has the characteristics of stability, reliability and high efficiency.

The invention discloses polymer graft modified graphene oxide as well as a preparation method and application thereof, and belongs to the field of building materials. The polymer grafted modified graphene oxide comprises graphene oxide and a polymer grafted on the surface of the graphene oxide through an ester bond, and the grafting mass ratio of the graphene oxide to the polymer is 1: (0.15-0.75). The preparation method of the polymer grafted modified graphene oxide comprises the following steps: firstly, carrying out esterification reaction on hydroxyl on the surface of graphene oxide and a reversible addition-fragmentation chain transfer polymerization (RAFT) chain transfer agent to generate GO of which the surface is grafted with the RAFT chain transfer agent; and adding a methacrylic acid monomer and an initiator, and carrying out RAFT polymerization on the surface of the GO to obtain a target product. The polymer grafting modified graphene oxide provided by the invention can achieve the effects of high polymer grafting ratio and capability of improving the fluidity of cement paste.

The present disclosure relates to the technical field of petroleum extraction, and disclosed are a forward and reverse circulation combined cementing tool and method, aiming to solve the problem of poor adaptability when using forward or reverse circulation cementing alone. The forward and reverse circulation combined cementing tool comprises a cross-circulation sub (2) and a reverse circulation cementing choke float shoe (3) which are arranged from top to bottom; the reverse circulation cementing choke float shoe (3) comprises a choke assembly (33) and a one-way valve (32), and the choke assembly (33) comprises a control module (332) and a choke module (333). The forward and reverse circulation combined cementing tool and method make full use of the advantages of forward and reverse circulation cementing processes, achieving pressure balance and cement slurry delivery, solving the problems of ultra-long cementing sections and complex formation cementing, greatly improving cementing quality and construction efficiency, and the cementing tool and method are suitable for cementing operations in oil and gas wells under complex geological conditions.

The invention discloses a thick soft soil foundation bridge bored pile construction method which comprises the following steps: firstly, vibrating and driving an outer pile casing to a stable depth, nesting an inner pile casing in the outer pile casing, then performing rotary excavating and drilling to reach 1m of the bottom of a pile, injecting high-pressure rotary spraying cement slurry into the bottom of the pile and synchronously starting vacuum suction, and then injecting compensation slurry at a reducing position through ultrasonic scanning, a reinforcement cage is installed, and finally control concrete is symmetrically poured through double guide pipes; through the synergistic effect of high-pressure cutting and vacuum negative-pressure suction, high-pressure cement paste can fully smash muddy sediment blocks at the bottom of a pile, and the vacuum suction device synchronously sucks suspended fine particles, so that the sediment removal rate is greatly increased, and the cleaning bottleneck of fine-particle sediments in a traditional process is broken through.

The invention discloses low-temperature coagulation-accelerating anion styrene-butadiene latex for oil field well cementation and a preparation method of the low-temperature coagulation-accelerating anion styrene-butadiene latex. The low-temperature coagulation-accelerating anion styrene-butadiene latex comprises the following components in parts by mass: 100 parts of anion styrene-butadiene latex raw stock; 4 to 10 parts of a nonionic surfactant I; 2 to 4 parts of a nonionic surfactant II; 10 to 20 parts of water glass; 0.5 to 1 part of a defoaming agent; and 15-20 parts of deionized water. The low-temperature coagulation-accelerating anionic styrene-butadiene latex prepared by the invention is used in cement paste, has short thickening time at low temperature, can resist sodium chloride brine to reach semi-saturation, and can effectively control the water loss of the cement paste, improve the anti-channeling performance of a cement paste system, reduce the elastic modulus of set cement, increase the density of the set cement and improve the stability of the set cement. Therefore, formation gas is effectively prevented from invading cement stone, and well cementation quality is guaranteed.

The invention discloses an intelligent regulation and control method and system for tunnel concrete spraying. The method comprises the steps that key influence factors of the adhesion and solidification process of concrete are determined; according to the determined adhesion and solidification process influence factors, material proportioning parameters are optimized in combination with cement grout fluidity and additive effect change characteristics, and based on an optimized proportioning scheme, the requirements of construction area differences for injection parameter adjustment are analyzed, and pressure and flow set values of injection equipment are determined; according to the determined pressure and flow set values, injection parameter adjusting instructions for different areas are generated, equipment operation configuration suitable for current temperature distribution is obtained, and a corrected operation instruction is generated; and the corrected operation instruction is transmitted to a spraying equipment control system, the equipment operation state is adjusted in real time, meanwhile, adjusted concrete solidification process control data are collected, and whether the final performance parameters meet the construction requirements or not is determined. The construction quality and efficiency are improved.

Pumpable slurry compositions including at least one aluminosilicate additive and optional pozzolanic cement additives and methods including the pumpable slurry compositions improve development of compressive strengths in the pumpable cement slurry compositions. The methods utilize one or more pumpable cement slurry compositions including at least one cement component, water, at least one first aluminosilicate additive, at least one optional second aluminosilicate additive, and one or more optional pozzolanic additives, where the at least one first aluminosilicate additive has an amorphous phase of greater than about 50% and a weight ratio of silica oxide to aluminum oxide of about 1.0 to about 2.5, and the at least one optional second aluminosilicate additive has a weight ratio of silica oxide to aluminum oxide of about 1.7 to about 3.3.

The present invention provides a rechargeable cement-based battery with high conductivity and a preparation method thereof, belonging to the field of energy storage technology. It prepares positive and negative electrodes by a particle dispersion method; iron particles dispersed in a cement matrix are the negative electrode, manganese dioxide particles dispersed in a cement matrix are the positive electrode, and a cement pore solution is the electrolyte; polyvinyl alcohol and K3Fe(CN)6 dispersed in the cement matrix are used as additives. The present invention also provides a preparation method and use of a rechargeable cement-based battery. The present invention uses polyvinyl alcohol commonly used in cement slurry to simultaneously improve the ionic conductivity of the positive and negative electrodes and the electrolyte cement matrix. The preparation method is simple and the raw material cost is low. The preparation of a rechargeable cement-based battery with high conductivity is achieved by adding polyvinyl alcohol and K3Fe(CN)6 and formula design. The cement-based battery of the present invention maintains the strength required for cement as a building material, while having a higher voltage and output current, and exhibits a higher energy density and cycle life.

The invention relates to the field of salt mine drilling well plugging, in particular to a bag type drilling well leakage plugging device capable of being used in a combined mode and a using method thereof.The bag type drilling well leakage plugging device comprises a drilling well and a drilling rod installed in the drilling well and further comprises a connecting sleeve composed of two plate bodies, and the connecting sleeve is connected with the surface of the drilling rod in an attached mode; a first bag body is arranged on the outer side of the surface of each connecting sleeve, grouting bases are arranged on the surfaces of the connecting sleeves, a second bag body is arranged between the two grouting bases, a liquid filling channel and a grouting channel are formed in the top of the surface of each connecting sleeve, and a filling connecting piece is arranged between the two grouting bases. A grouting opening is formed in the surface of the grouting seat; the bag structure is adopted, combined use is formed, the two sides of a leakage point are plugged through the first bag body, the closed area is formed, cement grout is injected into the closed area, the leakage point is plugged, meanwhile, the second bag body isolates the cement grout from the drill rod, drill jamming is prevented, and practicability is improved.

The invention discloses a rapid treatment system and method for mine well wall water inrush. The rapid treatment system comprises a double-liquid grouting machine, a mixer, a mixing section high-pressure rubber pipe, a grouting tee joint and a water stop sleeve. The double-liquid grouting machine is respectively communicated with a first slurry inlet hole and a second slurry inlet hole of the mixer through a first slurry outlet pipe and a second slurry outlet pipe, and cement slurry in the first slurry outlet pipe and water glass slurry in the second slurry outlet pipe are mixed at the mixer; a pressure release valve is mounted on the mixer; one end of the mixing section high-pressure rubber pipe is communicated with a slurry outlet hole of the mixer, the other end of the mixing section high-pressure rubber pipe is communicated with the water stop sleeve through the grouting tee joint, mixed slurry is fully mixed in the mixing section high-pressure rubber pipe and rapidly reacts, so that the mixed slurry forms pasty slurry at the outlet end of the mixing section high-pressure rubber pipe, and the pasty slurry is pressed into a water inrush point of a well wall through the water stop sleeve. And the water inrush point is quickly blocked. By arranging the mixing section high-pressure rubber pipe, the mixed slurry forms pasty slurry, rapid water plugging can be achieved, and the water disaster treatment emergency disposal capacity is effectively improved.

A method of cementing a geothermal wellbore includes pumping a first volume of cement slurry down a wellbore. The first volume of cement slurry has a first water to cement ratio. A second volume of cement slurry is pumped down the wellbore. The second volume of cement slurry has a second water to cement ratio that is less than the first water to cement ratio. The first volume of cement slurry hardens at a vertical portion of the wellbore, and the second volume of cement slurry hardens at a horizontal portion of the wellbore.

The invention discloses a shoal elevator suitable for grouting spiral anchor installation and a using method thereof. A spiral anchor fixed to the bottom of an anchoring base is screwed into an anchoring seabed, so that the anchoring base is fixed to a designated installation site, and shoal elevator installation is completed. When seabed soil is loosened, the rotary piling system starts to work, a sensor is arranged at the tip end of the grouting spiral anchor, and when the tip end touches seabed soil, an engineering ship can pressurize cement grout to the spiral anchor through a grouting pipe. And when the grouting screw anchor reaches the designed burial depth, the rotary piling system is disconnected from the grouting screw anchor, the fixed screw anchor at the bottom of the anchoring base is screwed out of the anchoring seabed, and the shoal elevator is pulled out of the seabed to be reused. According to the invention, the anchoring base can accurately reach a preset mounting site, and the deviation of the spiral anchor is reduced; it is ensured that the grouting spiral anchor reaches the sufficient penetration depth, and sufficient uplift bearing capacity is provided; the device is high in flexibility and suitable for shoal foundations of different oceans.

The invention discloses deep coal bed gas well cementation cement paste and a preparation method thereof, and the deep coal bed gas well cementation cement paste is prepared from the following raw materials in parts by weight: 100 parts of G-grade oil well cement, 5-15 parts of water-borne epoxy resin, 1.5-3 parts of a nano silicon dioxide solution, 0.5-1.8 parts of calcium sulfate whiskers, 0.2-0.6 part of composite coating fibers, 1.2-1.8 parts of a fluid loss agent and 0.5-1.8 parts of a retarder. 0.3 to 0.5 part of a drag reducer, 0.2 to 0.5 part of a defoaming agent and 38 to 42 parts of water; wherein the composite coating fiber is hydrophilic epoxy resin modified polyethylene fiber. The cement paste can improve the well cementation cementing packing quality of a coal seam, and has good filtration property.

The present invention discloses a method for preparing a high-ionic conductivity cement-based structured electrolyte and the electrolyte, comprising: mixing a polymer solution, cement, and fine sand to obtain a polymer-cement slurry; subjecting the polymer-cement slurry to low-temperature, sealed curing, and then allowing it to stand at room temperature to obtain a cement-based structured electrolyte. The present invention utilizes a controlled phase separation technique to enable elastic phase separation of the polymer network prior to cement hydration. During the hydration process, the cement adaptively forms the backbone of the polymer network, resulting in a good interface between the two, capable of forming continuous, high-conductivity ion channels. The preparation process is simple to operate and highly reproducible.

The invention provides a foundation pit water gushing iron ore grading thixotropic blockage reduction method which comprises the steps that iron ore tailings are crushed and screened into multi-stage particle size particles, and a customized mold is subjected to 3D printing based on foundation pit scanning data; paving particles in a mold layer by layer, doping iron powder, and cementing and curing cement paste to form a prefabricated body; the prefabricated body is installed to a water gushing area, the slurry viscosity is increased through a grading contact network, a weak gravitational flow state is triggered to be transiently changed to an anti-scouring state, and water flow speed reduction is achieved; alternating field induction micro-vibration is synchronously started during lateral grouting, and grout permeation and bubble discharge are driven; after solidification, the guide core body is pulled away, and remaining pore channels are self-compacted by a grading system to form an anti-seepage structure. The method has the advantages that the anti-scouring performance is enhanced; particle-slurry-foundation pit curved surface triple self-adaptive combination is carried out; the engineering cost is reduced.

The utility model relates to the technical field of cement slurry mixing, and in particular to a cement slurry mixing device, comprising a workbench, a base is fixedly connected to the left upper end of the workbench, a controller is fixedly connected to the left upper end of the workbench, the controller is located in the front of the base, an electric push rod is fixedly connected to the middle upper end of the base, a stabilizing rod is fixedly connected to the left upper end and the right upper end of the base, a cross frame is fixedly connected to the telescopic end of the electric push rod, the cross frame is movably connected with two stabilizing rods, a stirring mechanism is fixedly connected to the right upper end of the cross frame, and a No. 1 limit device, a stirring barrel and a No. 2 limit device are movably connected to the right upper end of the workbench in sequence from front to back, and the stirring mechanism extends into the stirring barrel. The cement slurry mixing device described in the utility model can limit the stirring barrel by setting the No. 1 limit device and the No. 2 limit device, thereby improving the stability during stirring.

The invention relates to the technical field of oil and gas field development, in particular to well cementation self-healing cement paste and a preparation method thereof. The concrete is prepared from the following components in parts by weight: 4 to 6 parts of repairing agent, 41 to 53 parts of cement, 18 to 22 parts of silica fume, 0.1 to 0.5 part of basalt fiber, 1 to 5 parts of expanding agent, 0.3 to 0.9 part of fluid loss agent, 0.2 to 0.4 part of bentonite, 1.7 to 2.3 parts of naphthalene sulfonate formaldehyde condensate, 0.1 to 0.2 part of simethicone and 1 to 3 parts of retarder, wherein the repairing agent is formed by modifying ethyl cyanoacrylate, candelilla wax and 3-isocyanate propyl trimethoxy silane according to the mass ratio of 1: (1-2): (0.1-0.3). According to the invention, ethyl cyanoacrylate is used for repairing micro cracks of cement, candelilla wax and nano silicon dioxide are used for carrying out microencapsulation to protect ethyl cyanoacrylate, and methoxy groups of 3-isocyanate propyl trimethoxy silane enhance the interface bonding force between microcapsules and a cement slurry system, so that the service life of a cement structure is effectively prolonged.

The utility model relates to the technical field of float collars and float shoes, and discloses a float collar and float shoe for well cementation of a deep well, which comprises a pipe body, G-grade cement is fixedly connected in the pipe body, a valve body is fixedly connected at the bottom of the G-grade cement, a spring is arranged in the valve body, a ball seat is slidably connected in the valve body, a ball body is fixedly connected at the top of the ball seat, and the top of the ball seat is fixedly connected with the spring. A twisted rod is fixedly connected to the bottom of the ball seat, a cross seat is rotatably connected to the periphery of the twisted rod, and a plurality of brushes are fixedly connected to the top of the cross seat. By arranging the pipe body, the G-grade cement, the valve body, the spring, the ball seat, the ball body, the twisted rod, the cross seat, the brush and the like, silt attached to the periphery of the spring can be cleaned, and the situation that due to the fact that too much silt is deposited in cement paste in the valve body, the too much silt attached to the periphery of the spring hinders stretching and retracting of the spring is prevented; the using effect of the valve body becomes poor, and the cement paste conveying efficiency is reduced.

The utility model discloses a cement setting time and consistency measuring device, and relates to the technical field of cement paste detection, a rotating table is arranged on a base, a test mold is arranged at the top of the rotating table, a supporting rod is vertically arranged on one side of the rotating table, an automatic measuring instrument is arranged right above the test mold, and the automatic measuring instrument is connected to the supporting rod through a fixing rod; a sliding rod is arranged in the middle of the automatic tester, a test needle is connected to the bottom end of the sliding rod, the infrared camera is arranged on one side of the automatic tester, and a cleaning mechanism is further arranged on the base and comprises a flushing assembly and a wiping assembly. The device can be used for measuring the consistency and the setting time of the cement mortar, repeated operation is not needed, great convenience is brought to measurement, the influence caused by human factors is reduced through automatic measurement and data recording, the result is more accurate and reliable, and the measurement accuracy is high. Meanwhile, an infrared camera is arranged for assisting in judging whether the cement sample reaches an initial setting state or not, so that the measurement error is reduced.