92 results about "Rubber Dams" patented technology

The invention relates to the technical field of hydraulic engineering materials, and particularly discloses a corrosion-resistant rubber dam and a preparation method thereof. The rubber dam is prepared by the following steps: forming a composite matrix (in a mass ratio of 60: 25: 15) by using ethylene propylene diene monomer (EPDM), brominated butyl rubber (BIIR) and hydrogenated butadiene-acrylonitrile rubber (HNBR), adding silane coupling agent modified nano zirconium oxide-aluminum oxide composite powder (ZrO2-Al2O3 with the particle size of 30-80nm) as a corrosion-resistant filler, and carrying out two-stage mixing and gradient vulcanization processes. The tensile strength retention rate of the obtained product in a corrosive environment with the pH value of 1-14 is larger than or equal to 92%, the ultraviolet aging resistance life reaches 30 years, the air tightness is improved by 5 times (the leakage rate is smaller than or equal to 2% / month) compared with a traditional EPDM dam, and the dam is suitable for high-corrosive water areas such as seawater backflow and acid rain.

The invention discloses a flexible blocking solid source early warning structure suitable for narrow and steep debris flow prevention and control, and relates to the technical field of debris flow prevention and control. The structure is selectively arranged in a circulation area formed by debris flow, is reasonably combined and arranged from upstream to downstream according to the channel length and the longitudinal slope, and at least comprises four stages of flexible carbon fiber grating net structures and a counterfort type rubber dam. According to the flexible blocking and source fixing early warning structure suitable for narrow and steep debris flow prevention and control, the blocking and source fixing effects are achieved, early warning can be conducted in advance, the structure can bear high-strength impact of narrow and steep debris flow, impact loads are dispersed, damage of debris flow impact force to the blocking structure is greatly reduced, and the flexible blocking and source fixing early warning structure is light, green and convenient to use. According to the transportation and installation scheme, the construction period is short, the difficulty is low, debris flow disasters are accurately predicted, the problem that a steep debris flow prevention and control structure is prone to failure is solved, and the investment benefits of prevention and control measures are exerted to the maximum extent.

The invention provides a rubber dam composite material with excellent air tightness and long service life. The rubber dam composite material is prepared from the following components in parts by weight: 100 parts of raw rubber, 40-100 parts of a reinforcing filler, 2-15 parts of an activating agent, 4-30 parts of a plasticizer, 0-10 parts of magnesium oxide, 1.0-10.0 parts of an accelerant, 0.5-10 parts of a vulcanizing agent and 0.5-10 parts of an adhesive, the raw rubber comprises butyl rubber and a second rubber component in a mass ratio of (10-90): (10-90), and the second rubber component is ethylene propylene diene monomer and / or natural rubber; the adhesive is selected from tackifying resin and modified phenolic resin. The rubber dam composite material has excellent aging resistance and ultraviolet resistance under the combined action of the raw materials of specific types and dosages, and the bonding performance between different rubber layers (or and between the different rubber layers and polyester or chinlon impregnated canvas) is excellent.

The invention relates to the technical field of rubber, in particular to outer-layer rubber of an aging-resistant rubber dam and a preparation method of the outer-layer rubber, the outer-layer rubber is prepared from the following raw materials in parts by weight: 100 parts of chloroprene rubber (CR), 5 parts of zinc oxide (ZnO), 2.5 parts of an anti-aging agent, an anti-aging agent 4010, an anti-aging agent 4010NA, 2 parts of an accelerant and a combined system of an accelerant NA-22 and an accelerant TT (or DM), according to the anti-aging rubber dam outer layer rubber, the service life of a dam can be remarkably prolonged, and performance reduction and potential safety hazards caused by material aging are reduced. The outer-layer rubber has excellent weather resistance, chemical corrosion resistance and ultraviolet irradiation resistance, and can keep stable physical properties even in an extreme environment, so that safe and stable operation of the dam under various working conditions is ensured.

The dam wall of a dam body is of a multi-layer composite structure and comprises a structural layer set, an anti-fouling rubber layer and a hydrophobic coating from inside to outside, and the structural layer set providing structural strength and deformation toughness is formed by bonding a plurality of rubber layers and canvas layers which are arranged in a crossing rule mode; the surface of the anti-fouling rubber layer for improving the anti-fouling function is compact and free of pores; and the hydrophobic coating is coated on the outer surface of the anti-fouling rubber layer. Due to the multi-layer structure and the surface design, attachment of dirt and microorganisms is remarkably reduced, the cleaning requirement and frequency are reduced, and the long-term maintenance cost is reduced.

The invention discloses an automatic intercepting and flushing device for a rubber dam of a drainage pipe based on filling and exhausting. The support frame includes a water level sensing chamber, a control chamber and an intercepting chamber. The control chamber is arranged above the intercepting chamber. The water level sensing chamber is adjacent to the control chamber and is located upstream of the intercepting chamber. The rubber dam is arranged in the intercepting chamber. The top of the rubber dam is provided with an exhaust hole and is connected to the top of the intercepting chamber. The lifting column is arranged in the control chamber, and the bottom of the lifting column is slidably matched with the exhaust hole. The water level control component is arranged in the water level sensing chamber. The water level control component includes a float, a control rod, a limiter and a delayer. The bottom of the control rod is connected to the float, and the upper part is transmission-connected to the upper part of the lifting column. The movement direction of the control rod is the same as the movement direction of the lifting column. The limiter is arranged above the float. The delayer is connected to the control rod. The invention can automatically start the exhaust and contraction of the rubber dam by using the water level height upstream of the rubber dam, and the sewage flushes the bottom sediment, and the rubber dam can automatically reset.

According to the intelligent early warning system for safety management of the rubber dam, various safety problems occurring in operation management of the rubber dam can be detected in time and fed back to engineering management personnel in time, precaution is carried out in advance, early warning is sent to dangerous source audiences, and therefore casualties and property losses are avoided or reduced. Through informatization and intelligentization technologies, various dangerous sources possibly existing inside and outside a rubber dam project are all provided with sensors, video monitoring devices and image recognition devices, all-weather, all-directional and dead-corner-free monitoring is carried out, various dangers occurring in operation management of the rubber dam can be monitored and recognized, manual monitoring and recognition of the dangers are not needed, and the safety and reliability of the rubber dam are improved. The project management personnel do not need to carry out frequent project inspection, the project management efficiency is improved, manual passive defense is changed into intelligent active defense, and the project safety is guaranteed. The system is mainly composed of a monitoring module, an intelligent control and analysis module, an early warning module and a system management module, after the early warning system monitors and identifies dangers, the early warning system can feed back the dangers to project management personnel in time, early warning information is sent to dangerous source audiences, the rubber dam is intelligently controlled to be filled and collapsed, and intelligent power failure is achieved; therefore, casualties and property loss can be avoided or reduced.

The utility model belongs to the technical field of rubber dam cloth, specifically relates to a rubber dam cloth with clip, including rubber dam cloth body and rubber dam clip, the middle position of rubber dam cloth body is equipped with tooth placing gap for placing tooth, the part of rubber dam cloth body on the peripheral side of tooth placing gap is barrier cloth turn -up portion, two end parts of rubber dam clip are clip clamping parts, two clip clamping parts and barrier cloth turn -up portion fixed connection, the material of rubber dam clip and clip clamping part is plastic, stainless steel, nickel titanium alloy, silica gel, silicon rubber or synthetic resin, the fixed connection of clip contact block has in clip clamping part, and clip contact block and barrier cloth turn -up portion fixed connection. The utility model can reduce the gap between tooth and rubber dam cloth, reduce the phenomenon that medicine passes through gap and flows into the inside of mouth cavity.

The utility model discloses a rubber dam engineering river surface weed cleaning device, which belongs to the technical field of rubber dam engineering and comprises a body, a smashing mechanism, a collecting mechanism and a beating mechanism are arranged on the body, fixing plates are symmetrically arranged on the body, the collecting mechanism comprises a fixing frame fixedly arranged between the two fixing plates, and the beating mechanism is arranged on the fixing frame. The fixing frame is obliquely arranged, a driving wheel is rotationally arranged at the high end of the fixing frame, a driven wheel is rotationally arranged at the bottom end of the fixing frame, the driven wheel and the driving wheel are in transmission connection through a conveying belt, and hooks are arranged on the surface of the conveying belt in an array mode. By means of the smashing roller, the bent hook and the smashing teeth, collected weeds can be effectively cut up, the situation that the weeds are too long to wind around the collecting mechanism, normal operation of the device is affected is effectively avoided, and the operation stability of the device is effectively improved.

The utility model discloses an implantation guide plate with a rubber barrier, which particularly relates to the field of dental implantation and comprises a positioning plate, rubber barrier cloth is arranged at the upper end of the positioning plate, a guide plate is arranged at the upper end of the rubber barrier cloth, a positioning groove is formed in the bottom end of the positioning plate, a clamping plate is arranged in the positioning groove, and a clamping groove is formed in the clamping plate. A positioning groove is formed in the upper end of the positioning plate, a positioning protrusion is arranged at the bottom end of the guide plate, a guide ring is fixedly arranged in the middle of the guide plate, and a guide ring in-place hole is formed in the upper end of the positioning plate. According to the utility model, the rubber barrier cloth is arranged between the positioning plate and the guide plate, can play roles in isolating moisture, isolating infection, clearing the visual field, pulling soft tissues and the like, can prevent cooling water, saliva or blood from influencing the operation of medical personnel during hole preparation, and can improve the visual field in the oral cavity and the success rate of the implant.

The utility model belongs to the technical field of rubber dam bags, and discloses a rubber dam bag protection device. The dam bag is mainly technically characterized by comprising a dam bag body, an upstream anchor bolt is arranged at the front end of the dam bag body, a downstream anchor bolt is arranged at the rear end of the dam bag body, protective cloth is arranged on the dam bag body, a spraying water pipe is arranged on the protective cloth, the top end of the spraying water pipe is connected with a water pump, and the top end of the spraying water pipe is connected with the water pump. The tail end of the spraying water pipe is connected with spraying heads which are uniformly distributed on the dam bag body, an upstream mounting part is arranged at the front end of the dam bag body, a downstream mounting part is arranged at the rear end of the dam bag body, the front end of the protective cloth and the upstream mounting part are fixed through a bolt, a lock catch or a binding mode, and the rear end of the protective cloth and the downstream mounting part are fixed through a bolt, a lock catch or a binding mode. According to the rubber dam bag protection device, in the dry season, the protection cloth absorbs water and simulates the soaking state of the dam bag, the aging speed of the bag body of the dam bag is slowed down, and the service life of the rubber dam bag is prolonged.

1. Name of the design product: Rubber dam. 2. Use of the design product: For use during oral treatment. 3. Design key points of the design product: Lies in the shape. 4. Picture or photo that best shows the design key points: Perspective view.

The invention relates to the technical field of rubber barrier clip storage, in particular to a rubber barrier clip storage box for disinfection, which comprises a bottom box, a fixing assembly and a box cover, the bottom box comprises a box body and partition plates, the partition plates are installed in the box body and divide the interior of the box body into a plurality of containing cavities, vent holes are formed in the partition plates to communicate the adjacent containing cavities, and first through holes and second through holes are formed in the front face and the back face of the box body in a staggered mode respectively; the fixing assembly comprises a base and a buckling nail, the base is inserted into the box bottom, the lower end of the base protrudes out of the box bottom, and the buckling nail is inserted into the base and supports the base on the beak portion of the rubber barrier clip in an expanding mode. The box cover is buckled on the box body, a third through hole is formed in the front face of the box cover, and a fourth through hole is formed in the back face of the box cover. The problems that management is inconvenient, the service life is affected, disinfection is not thorough and the like due to the fact that a special container is lacked when an existing rubber barrier clip is used for disinfection and disinfection are solved.

The invention relates to a nuclear power plant cold source system rubber dam aging state detection method and system.The nuclear power plant cold source system rubber dam aging state detection method comprises the steps that S1, historical rubber dam engineering data are obtained and subjected to statistical analysis, and sample layout data are obtained; s2, placing a sample at a position corresponding to the sample layout data, carrying out regular sampling detection on the sample, judging whether a defect exists or not, and if the defect exists, executing a step S3; s3, repairing the defect position of the sample; s4, material performance testing is conducted on the repaired sample and / or the sample without the defects, and a performance testing result is obtained; and S5, performing trend analysis based on the performance test result to obtain a service trend result. According to the method, samples are placed at corresponding positions, regular sampling detection and testing are carried out, and trend analysis is carried out, so that quantitative evaluation of the aging state of the rubber dam and accurate prediction of the service trend are realized.

The utility model relates to a rubber barrier face bow which comprises a face bow body and a rubber barrier, the face bow body is provided with a plurality of fixing protrusions used for fixing the rubber barrier, the face bow body is in a U shape and comprises a transverse rod, vertical rods connected to the two ends of the transverse rod and shielding rods formed by upwarping one ends of the vertical rods, and the rubber barrier is connected between the two shielding rods. According to the utility model, the face bow body tilts upwards, and the rubber barrier is connected between the two shielding rods, so that a barrier is formed at the front end of the face bow body, and the phenomenon that flushing fluid splashes to the face of a patient is not easy to occur when an operation area is cleaned by flushing operation.

The utility model provides a desilting structure suitable for a water intake of a rubber dam, which comprises a sand flushing pump, a sand flushing main pipe is detachably mounted at the outlet end of the sand flushing pump, the tail end of the sand flushing main pipe extends to the bottom of the water intake, two branch pipes are fixed on the sand flushing main pipe in the water intake, and jet nozzles are fixedly mounted on the surfaces of the branch pipes at equal intervals. The bottom of the sand flushing main pipe is provided with a water filling pump installed in the water intake, the top of the sand flushing pump is provided with a chain block, and the top of the sand flushing pump is provided with a hook end connected with the chain block. And then sludge is discharged to the downstream through the water filling pump, the sludge is prevented from entering the rubber dam from the water intake, so that the operation reliability of the water filling pump is improved, the service life of the rubber dam is prolonged, and the convenience of device maintenance can be improved through the detachable lifting type sand flushing pump.

The utility model discloses a rubber dam body with buttonhole type anchoring holes and a rubber air bag of an air shield dam with the buttonhole type anchoring holes, and belongs to the technical field of water retaining water conservancy facilities. Comprising an extending part and a plurality of buttonhole type anchoring holes, and the extending part of the rubber dam body and the extending part of the air shield dam rubber air bag are in contact with a concrete foundation surface and are used for anchoring the concrete foundation surface; the rubber dam body and the air shield dam rubber air bag are provided with a plurality of continuous fiber skeleton layers which are mutually crossed by 90 degrees and bypass the anchoring holes. The buttonhole type anchoring holes are formed by embedding a plurality of conical metal buttonhole nails into the extending parts of the rubber dam body and the air shield dam rubber air bag; the rubber dam body and the air shield dam rubber air bag are integrally preformed and manufactured through an integral process. When the rubber dam body and the air shield dam rubber air bag are constructed and applied, punching or anchoring hole reserving through a complex production method is not needed, the strength of the dam body and the air bag is greatly enhanced, and the using safety and the service life of the rubber dam and the air shield dam rubber air bag are guaranteed.

The utility model discloses a rubber dam bag damage emergency plugging device, and relates to the technical field of rubber dam bags. The device comprises a hollow column, a plugging assembly is arranged on the inner side of the hollow column, and a limiting assembly is arranged at the top of the hollow column. The plugging device is inserted into the damaged position of the rubber dam bag to clamp and plug the inner side and the outer side of an adhesive tape at the damaged position of the rubber dam bag, the clamping area of the inner side of the damaged position can be enlarged, the plugging effect is improved, repairing is firm, reliability is high, water is not leaked, durability is achieved, repairing operation is simple and convenient, and the repairing efficiency is improved. The rubber dam bag damage repairing device is simple in structure, low in technical requirement for repairing personnel, capable of completing repairing in an extremely short time, capable of being put into use immediately after repairing, free of waiting, capable of being used for emergency repair under the emergency situation after dam bag damage and capable of being used for daily repairing, free of glue smearing, free of toxicity, free of water pollution and free of poison to management personnel, and the rubber dam bag damage repairing device can be used for emergency repair under the emergency situation after dam bag damage.

The present invention relates to the field of rubber dam clip storage technology, and in particular to a rubber dam clip storage box for disinfection, comprising a bottom box, a fixing assembly, and a box cover; the bottom box comprises a box body and a partition, the partition being installed in the box body and dividing the box body into a plurality of accommodating cavities, the partition being provided with vents to connect adjacent accommodating cavities, the front and back of the box body being respectively provided with first and second through holes arranged in a staggered manner; the fixing assembly comprising a base and a snap-fitting pin, the base being plugged into the box bottom and the lower end protruding from the box bottom, the snap-fitting pin being plugged into the base and supporting the base expansion on the beak of the rubber dam clip; the box cover being snap-fitted to the box body, the front of the box cover being provided with a third through hole, and the back of the box cover being provided with a fourth through hole. The present invention solves the problems of inconvenience in management, affected service life, and incomplete disinfection caused by the lack of a dedicated container for the disinfection and delivery of existing rubber dam clips.

This invention relates to the field of water conservancy engineering technology, and particularly to a movable dam for water conservancy projects, comprising a rubber dam body; the rubber dam body consists of a laying section and an unfolding section; a plurality of rubber sheets are fixedly connected at equal intervals between the laying section and the unfolding section; a plurality of grooved plates are fixedly connected at equal intervals on the laying section of the rubber dam body; each grooved plate is located on the side of a rubber sheet; a insert plate is inserted into each grooved plate; a stop block is fixedly connected to each insert plate; each stop block is placed on the laying section. After the rubber dam body is laid out manually, the unfolding section located above the grooved plates is lifted manually, and then the insert plate connected to the stop block is inserted into the grooved plate. In this way, the unfolding section, supported by the stop block, is pushed upward to create a gap with the laying section; thus, when the water rises, the water will naturally enter between the laying section and the unfolding section, thereby allowing the water to smoothly support and unfold the unfolding section.

The noise reduction rubber dam comprises a bottom plate arranged in a riverway in a crossing mode, a rubber dam body for sealing the riverway is arranged on the bottom plate and divides the riverway into an upstream area and a downstream area, and a drainage channel penetrating through the bottom plate is formed in the bottom plate in the direction of the riverway. A turnover adjusting plate is arranged on the inner top wall of the drainage channel, and an adjusting air bag is arranged between the adjusting plate and the inner top wall of the drainage channel. The drainage channel is formed in the bottom plate, water in the upstream area is drained through the drainage channel, the water level difference between the upstream area and the downstream area is effectively reduced, and water sound generated by water flowing into the downstream area is greatly reduced; and the turnover adjusting plate and the adjusting air bag are arranged, effective control over the water flow is achieved, river channel blockage is prevented, the opening degree of the drainage channel can be adjusted by adjusting inflation and deflation of the air bag, and therefore the water flow speed is slowed down to a certain degree, and the decibel of water flow sound is further reduced.

The application relates to the technical field of dental instruments, in particular to an intelligent bite pad integrated with an opening device and a rubber dam clamp, which comprises a rubber dam clamp, the rubber dam clamp comprises two clamping arms and an elastic arc bow, the two clamping arms are connected through the arc bow, a first bite part is arranged on one side of the clamping arms close to the arc bow, a connecting shell is fixedly arranged on the top of the first bite part, a connecting port is arranged on the side, away from the first bite part, of the connecting shell, a second bite part is movably arranged on the connecting shell, an adjusting assembly for adjusting the distance between the first bite part and the second bite part is arranged in the connecting port, and bite grooves are arranged on the sides, away from each other, of the first bite part and the second bite part. During oral treatment, the rubber dam cloth is used to separate the diseased tooth from other oral structures, the diseased tooth is isolated, the patient bites the first bite part and the second bite part, the oral cavity of the patient is supported, and the comfort of the patient is improved.

The utility model belongs to the technical field of rubber barrier clips, and particularly relates to a rear tooth rubber barrier clip stabilizing device. Comprising an elastic metal ring, the elastic metal ring is an open ring, rubber barrier clamping assemblies are fixedly arranged at the two ends of the elastic metal ring, and two stabilizing assemblies are arranged on the inner side of the elastic metal ring. According to the utility model, the stabilizing assembly is arranged to provide upward supporting force for the rubber barrier clamping assembly clamped on the rear teeth, so that the rubber barrier clamping assembly tends to be horizontal, and the rubber barrier clamping assembly in the horizontal state can prevent the rubber barrier clamping assembly from being inclined due to stress and colliding with the gingiva of a treated child; the problem that the tooth treatment progress is affected due to the fact that children feel painful due to the fact that the children do physical reactions when eating the teeth, and the physical reactions of the children not only affect doctors to observe the teeth needing to be treated of the children, but also enable the doctors not to treat the teeth through medical instruments is solved.

The utility model relates to the technical field of medical supplies, and discloses an oral cavity rubber barrier capable of absorbing water, which comprises a fixing frame, the bottom of the fixing frame is fixedly connected with a bottom layer rubber barrier, the bottom of the bottom layer rubber barrier is fixedly connected with a plurality of tooth position sleeves, the top of the fixing frame is fixedly connected with a top layer rubber barrier, and the top layer rubber barrier is fixedly connected with a plurality of tooth position sleeves. A plurality of flow guide holes are formed in the top of the top-layer rubber barrier, a drainage tube is fixedly connected to the interior of the bottom-layer rubber barrier, and a drooping suction tube is fixedly connected to the exterior of the drainage tube. According to the utility model, through the matching of the double-layer rubber barriers and the use of the flow guide holes, liquid contained in the oral cavity can be conveniently sucked out through the drainage tube during use, the drying degree and the operation visual field in the oral cavity treatment process are improved through the design, and the discomfort of a patient in the treatment process is reduced; the safety and the efficiency of dental treatment can be improved, and a doctor can be ensured to operate in a clear and comfortable environment.

The embodiment of the invention discloses a rubber dam height measuring device and a rubber dam control method. According to one specific embodiment, the rubber dam height measuring device comprises a structure device and a sensing device, the structure device comprises a measuring vertical rod, a rotatable fixing device and a horizontal rod, the sensing device comprises operation equipment, an angle gauge, water level monitoring equipment and a sensor set, the fixed end of the measuring vertical rod is connected with the rotatable fixing device, and the fixed end of the measuring vertical rod is connected with the horizontal rod. The connecting end is connected with the horizontal rod through a metal connecting chain; the rotatable fixing device is fixed on a bank slope; the operation equipment is connected with the angle gauge and the sensor group through wires; the angle gauge is mounted at the fixed end of the measuring vertical rod; the water level monitoring equipment is mounted on a bank slope; and the sensor group is arranged in the horizontal rod. According to the embodiment, the situation that downstream water flow is small or even disappears is avoided, and the water flow velocity cannot be determined is avoided.

To provide an emergency repair method and repair device for when damage such as breakage or cracking occurs near the base of a deflector of a rubber dam. [Solution] A first drilling step is performed in which through holes 11 are drilled at a predetermined interval in the rubber bag body 1 so that the damaged area is surrounded by the multiple through holes 11 penetrating the rubber bag body 1 and the leading edge 31 of the deflector 3. Next, a pair of upper and lower pressure plates 5, 6, 7, each having a multiple number of fastening holes 59, 69 formed therein at a predetermined interval, are positioned from the top and bottom sides of the rubber bag body 1, and then a second step is performed in which fastening fittings 8 are inserted into the fastening holes 59, 69 and through holes 11 to temporarily fasten them. Then, a third step is performed in which caulking 9 is filled into the gap between the rubber bag body 1 and the pair of upper and lower pressure plates 5, 6, 7. Finally, a fourth step is performed in which a part of the rubber bag body 1 and the caulking 9 are sandwiched between the pair of upper and lower pressure plates 5, 6, 7 to fix them in a state where they are sandwiched between them.

The utility model relates to a movable inner support device for controlling local deformation of a rubber dam bag, which comprises a rubber dam bag, a repair air bag, an inflation inlet, an inflation tube, a traction rope, a traction rope winch, inflation equipment and power supply equipment, the repairing air bag is arranged in the rubber dam bag; one end of the inflation tube is fixedly connected with the inflation inlet, and the other end of the inflation tube is connected with inflation equipment; the inflation equipment is connected with the power supply equipment; the traction ropes and the traction rope winches are arranged in two groups and are respectively arranged on two sides of the rubber dam bag; the repairing air bag horizontally moves in the rubber dam bag through the pulling rope and the pulling rope winch. The movable repairing air bag is arranged in the rubber dam bag in the axial direction, targeted positioning rapid repairing is carried out at the vertical deformation position of the dam bag, and the problems that the dam bag is bent to generate local vertical deformation, then the water retaining function, the landscape effect and the service life are affected, and even the internal pressure ratio is increased, and operation potential safety hazards exist are solved.

The utility model provides a rubber barrier capable of automatically sucking saliva. The rubber barrier comprises a rubber barrier main body, a filter screen and a negative pressure suction tube, the rubber barrier main body comprises a ring cover, a funnel, a rubber barrier and a rubber hose, the rubber barrier is positioned at the upper end of the rubber barrier main body and is in a shape with high periphery and low center, the ring cover is positioned at the lower end of the rubber barrier, and four supporting bulges which are symmetrically distributed about the circle center are connected to an inner ring of the ring cover; the filter screen is fixed on the ring cover through the supporting protrusion, a funnel is connected below the ring cover, a rubber hose is arranged at the bottom of the funnel, and the end of the rubber hose can be tightly connected with a negative pressure suction tube. The device is simple in structure, few in operation equipment, capable of well exposing the oral cavity operation visual field, capable of improving oral cavity diagnosis and treatment efficiency, free of nursing and saliva suction, capable of reducing manual operation and capable of automatically collecting blood, water and material scraps generated in oral cavity treatment in a centralized mode.