238 results about "Medium pressure" patented technology

The invention relates to the technical field of coal mine underground drilling equipment, in particular to a gyrator for a coal mine directional drilling machine and a using method.The gyrator comprises a shell, an input shaft and an output shaft, the shaft extension end of the output shaft is provided with a pressure balance type multiple dynamic sealing system, and the sealing system comprises a main sealing unit, a pressure balance unit and a dustproof sealing unit; the pressure balance unit comprises a sealing cavity, a lubricating grease injection channel and a grease injection nozzle; pressure lubricating grease is injected into the sealing cavity through the grease injection nozzle, so that a dynamic positive pressure barrier higher than the internal medium pressure of the gyrator and the external pressure of the environment is formed in the sealing cavity; through a triple sealing structure formed by combining the spring seal main seal, the pressurization balance cavity and the V-shaped dustproof ring and by combining an active injection and dynamic balance using method, passive blocking of traditional sealing is converted into active defense, the problem of invasion of high-pressure slurry and pulverized coal is effectively solved, and the service life of the sealing device is prolonged. And the working reliability and the service life of the equipment are obviously improved.

The invention provides a valve device. The valve device comprises a main valve component, a bypass valve component and a communicating pipe. When the medium pressure difference of the inflow runner part and the outflow runner part of the main valve part reaches the preset value, the first valve port part of the bypass valve part can be opened for pressure relief, the bypass valve part and the main valve part are integrated, and the problem that the pressure relief function is lost due to reverse installation of the bypass valve part does not exist. The bypass valve component is provided with the pressure gauge connector part, the bypass valve component has a bypass function and a cut-off function, a channel between the pressure gauge connector part and the main valve component can be cut off, and the safety problem when the pressure gauge is connected is solved.

The invention belongs to the technical field of nuclear power, and particularly relates to a pressure self-driving type separation pressure relief device. The device is driven to be opened through unbalanced force caused by medium pressure to the valve rod assembly. The separation structure is arranged, and the bearing bush and the separator can complete the separation action when the required separation pulling force is applied; the protector is of an integrated structure, one end of the protector is designed to be a blind hole, the head of the protector is designed to be a weak area, zero leakage is kept in a closed state under the normal working condition, when medium pressure reaches starting pressure, the disengaging structure is disengaged, the valve rod breaks the protector in a pulling mode, and the opening action is completed. The whole action process does not depend on external energy, signals, manpower and other operations, has the characteristic of high reliability, and can be applied to numerous key parts needing to execute the pressure relief function.

The utility model provides a fluid medium pressure gauge adopting an embedded damping device, which comprises a damping plate, bottom plates are arranged on two sides in a sliding chute, a supporting seat is movably arranged at the top of each bottom plate, an outer protection plate is mounted at the top of each supporting seat, and a pressure gauge body is mounted on each outer protection plate. An inner buffer rubber block is arranged between the bottom of the pressure gauge body and the outer protection plate; according to the utility model, the top of the damping plate is provided with the supporting seat sliding on the bottom plate, the top of the supporting seat is provided with the outer protection plate, the pressure gauge body is supported by the outer protection plate, and one side of the supporting seat is provided with the damper, so that the pressure gauge body can be damped through cooperation of the supporting seat and the damper when being subjected to transverse vibration; and meanwhile, the inner buffer rubber block is arranged between the pressure gauge body and the outer protection plate, so that the transmitted vibration can be reduced through the inner buffer rubber block when the pressure gauge body is subjected to vertical vibration, and the impact on the pressure gauge body is reduced.

The utility model relates to a pilot-operated type pressure balance pneumatic valve which comprises a valve body, a valve cover and a valve rod, and a valve seat is installed at the position of a valve shoulder of the valve body. The valve body is connected with the valve cover through a bolt; a through hole is formed in the center of the valve deck, the valve rod moves up and down along the through hole in the valve deck, and a sleeve is arranged on the upper portion of the valve seat and fixed in the valve body through the valve deck. A valve clack is arranged in the sleeve and moves up and down in the sleeve; a pilot valve core is arranged in the valve clack; a pressure balance disc is arranged on the top of the pilot valve element. The thrust requirements of the valve in the opening, closing, opening process, closing process and semi-opening state are greatly reduced, the opening process and the closing process only need to overcome friction of all parts and can be achieved without overcoming medium pressure, and meanwhile the medium auxiliary sealing effect in the full-closing state of the valve is reserved; while the good sealing performance is met, the opening and closing thrust of the valve is reduced, the operability of the valve is improved, and the requirement for an actuator is reduced.

The utility model discloses a device is unloaded to tank car with ice machine liquid ammonia simply, including compressor, ice machine system, liquid ammonia unloading pipeline, liquid ammonia pipeline, medium pressure nitrogen pipeline and tank car, ice machine system includes anti surge cooler, liquid ammonia storage jar and power saver, compressor links to each other with anti surge cooler, and anti surge cooler links to each other with liquid ammonia storage jar, and liquid ammonia storage jar links to each other with power saver, and power saver links to each other with the ammonia cooler of low temperature methanol washing system, and the ammonia cooler of low temperature methanol washing system links to each other with compressor, be connected with liquid ammonia pipeline on liquid ammonia storage jar, and liquid ammonia pipeline links to each other with tank car, be connected with liquid ammonia unloading pipeline on power saver, and liquid ammonia unloading pipeline links to each other with liquid ammonia pipeline, and medium pressure nitrogen pipeline links to each other with liquid ammonia pipeline and tank car. Advantage is: guarantee ice machine system supplement liquid ammonia and can utilize same pipeline safely and effectively when storing liquid ammonia in system and unloading, avoid the emergence of overpressure or leakage due to preparation use temporary pipeline and cause safety accident.

The pipeline pressure blocking operation multi-degree-of-freedom hydraulic manipulator device and method of the present application belongs to the pipeline repair and pressure blocking technical field, comprising: setting pressure blocking execution device, wherein the pressure blocking execution device comprises a main feeding rod and a blocking head at the end of the main feeding rod, and an embedded fine adjustment mechanism is connected between the blocking head and the main feeding rod, and the scheme adopts the parallel connection configuration of high-strength flexible hinge and micro hydraulic cylinder; the high-strength flexible hinge has very high rigidity in the axial direction, can withstand the huge axial thrust generated by the medium pressure up to 25 MPa or above, and ensures that the blocking head is not pushed back; at the same time, by using the incompressibility of hydraulic oil, the system can still realize the fine adjustment of ± 3 degrees to ± 5 degrees of pitch and yaw while maintaining high pressure bearing capacity through the coordinated action of the hydraulic cylinder, solving the pain points of easy self-locking and difficult adjustment under high pressure.

The application relates to the technical field of valve driving, and discloses a high-speed driving device and a method thereof, which comprises a cylinder body, a piston is slidably connected to the inner wall of the cylinder body, an energy storage cavity and an annular cavity are arranged at the upper part of the inner wall of the cylinder body, a buffer cavity is arranged at the lower part of the inner wall of the cylinder body, the annular cavity is communicated with the buffer cavity, the energy storage cavity, the annular cavity and the buffer cavity are all connected with an external pressure source, the energy storage cavity is connected with a first controller and a first valve, the first controller is used for controlling the opening and closing of the first valve, the annular cavity and the buffer cavity are connected with a second controller and a second valve, and the second controller is used for controlling the opening and closing of the second valve. The pressure medium of the energy storage cavity is fed in advance, when the pressure medium in the buffer cavity flows into the annular cavity, the piston can respond instantaneously, and the pressure medium does not need to be injected, under the action of the medium pressure of the energy storage cavity and the medium pressure of the annular cavity, the piston is driven downward instantaneously, and millisecond-level response of the piston is realized.

The invention relates to the field of centrifugal pumps, in particular to an efficient throttling and sealing self-balancing centrifugal pump. Comprising a pump body, a self-balancing rotor assembly, a two-way throttling sealing structure, an inner sealing ring, an outer sealing ring, an outer sealing ring, an inner sealing ring, an outer sealing ring, an inner sealing ring, a sealing ring, an inner sealing ring, a sealing ring and an outer sealing ring, wherein the pump body is provided with a forward cavity and a reverse cavity which are respectively communicated with a liquid inlet and a liquid outlet; and one end of the double-side transition pipe is communicated with the forward cavity and the other end of the double-side transition pipe is communicated with the reverse cavity. The inner sealing ring is embedded in the inner side between the butt joint flange and the mounting flange, the outer sealing ring is arranged on the periphery between the butt joint flange and the mounting flange in a sleeving mode, the two annular gaskets are located on the upper end face and the lower end face of the inner sealing ring respectively, and the positioning bushes are arranged on the outer sides of the annular gaskets. Through the semi-embedded and semi-convex structure of the annular gasket, radial and axial deformation is synchronously generated under the medium pressure, self-reinforced sealing is formed, pre-tightening force is not needed, the sealing specific pressure is automatically increased along with the pressure, complex working conditions are adapted, and efficient sealing is achieved.

The present application relates to the technical field of ball valve, more particularly, to a full-welded ball valve, which comprises a welded valve body, a movable valve core, a ball and a floating valve seat; the left and right sides of the inner cavity of the welded valve body are both provided with stepped holes, the two ends of the movable valve core are respectively provided with columnar structures which are in sliding fit with the stepped holes on the corresponding side, the two ends of the movable valve core are respectively in sealing fit with the stepped holes on the corresponding side through corrugated pipes I, and a rebound device is arranged between the movable valve core and the welded valve body to drive the movable valve core to move to the medium inlet side of the welded valve body; the medium inlet side of the welded valve body is provided with a cut-off device. The pressure balance mechanism composed of the movable valve core, the rebound device and the cut-off device is arranged, in the closed state of the ball, the medium pressure is mainly borne by the cut-off device, and the ball only bears the elastic force provided by the rebound device, so that the sealing reliability and service life of the valve under the high-pressure frequent opening and closing working condition are significantly improved.

The invention relates to the technical field of rubber detection, in particular to a testing device and method for a rubber expansion joint. A testing device for a rubber expansion joint comprises a pressure-bearing test chamber 10, a temperature and humidity control system 20, a corrosion medium circulation system 40 and a pressure circulation control system 30, the corrosive medium temperature and humidity control system 20 is connected with the corrosive medium pressure-bearing test cabin 10 through a pipeline and is used for controlling the temperature of a medium in the corrosive medium pressure-bearing test cabin 10; the corrosive medium circulating system 40 is connected with the corrosive medium pressure-bearing test cabin 10 through a pipeline and is used for pumping and circulating a corrosive medium into the corrosive medium pressure-bearing test cabin 10; and the corrosive medium pressure circulation control system 30 is connected with the corrosive medium pressure-bearing test cabin 10 through a pipeline and is used for applying circulation pressure to the medium in the corrosive medium pressure-bearing test cabin 10. The three systems are connected into the test bin, synchronous coupling loading of three key factors of temperature, corrosion media and pressure is successfully achieved, and the accuracy of test data in the aspect of real life prediction is improved.

The utility model relates to pipeline installation technical field, concretely is a pipeline laying fixed structure, it includes bottom plate, adjusting mechanism, pipeline installation mechanism, fixed establishment and installation box, adjusting mechanism sets up at the top of bottom plate, pipeline installation mechanism sets up at the top of adjusting mechanism, fixed establishment sets up at the side of adjusting mechanism, the inside slide of installation box is provided with moving plate, the utility model discloses the setting of fixed establishment, motor drives drill bit to drill into the ground, miniature cylinder drives the land of the side of reinforcing plate to tie into, thereby realizes the multiple fixed of device, like this can avoid pipeline in operation to receive thermal expansion and cold shrink, medium pressure, ground subsidence etc. external force effect, thereby leads to local stress concentration, causes pipeline deformation, interface loosening even rupture, and through multipoint fixed, will stress dispersion to multiple support points, avoids single point overload, thereby protects pipeline structure integrity.

The utility model discloses a combustible liquid vehicle filling anti -drop device belongs to combustible liquid filling technical field, this combustible liquid vehicle filling anti -drop device, including the bearing mechanism and the compression mechanism, the bearing mechanism is clamped fixed with the connector mechanism for the liquid filling of the butt joint pipeline, the connector mechanism is integrally fixed with the locking mechanism for locking the compression mechanism. The utility model discloses the setting of bearing mechanism, connector mechanism, locking mechanism, compression mechanism and sliding mechanism, locking mechanism can lock the compression mechanism, effectively prevent the compression mechanism and rotate loose because of the mistake touch or because of medium pressure etc.

The invention relates to the technical field of valves, and particularly discloses a sealing ring capable of automatically adjusting sealing pressing force according to system pressure, the sealing ring is applied to a valve assembly, and the valve assembly comprises a valve body, a valve element arranged in the valve body and a water pipe penetrating through the valve body; the sealing ring is of an integrally-formed structure and comprises a sealing ring body, the sealing ring body is provided with a valve body sealing face making contact with the inner wall of the valve body and a water pipe sealing face making contact with the outer wall of the water pipe, and the sealing ring body is used for achieving sealing between the interior of the valve body and the external environment; the inner side sealing structure and the outer side sealing structure are arranged on the inner side ring portion of the sealing ring body from inside to outside in the radial direction and jointly form a valve element sealing face making contact with the outer wall of the valve element. According to the invention, by designing a geometrical configuration with an inner and outer double-lip sealing structure and a corresponding pressure-bearing surface, the sealing pressing force of the sealing ring does not only depend on the initial pre-tightening force of a material, but can be adaptively adjusted by using the pressure of a working medium of a system.

The utility model discloses a flow-controllable stop valve which is characterized by further comprising a pressure reduction buffer structure which is installed in a valve front channel of a valve body and used for reducing the flow velocity and pressure of a medium. The pressure reduction buffer structure comprises a plurality of flow slowing plates installed in the valve front channel in a stacked mode, a locking screw plate used for limiting and installing the flow slowing plates in the valve front channel and a plurality of through holes formed in the flow slowing plates and the locking screw plate and used for medium circulation. According to the utility model, through the arrangement of the pressure reduction buffer structure, the pressure of a medium is reduced, the flow speed of the medium is reduced, and the impact force of the medium is reduced, so that the normal use of equipment behind the valve is prevented from being influenced by overlarge pressure of the medium in front of the valve, and meanwhile, the flow of the medium after pressure reduction and speed reduction is controllable.

An accumulator assembly is interposed hydraulically between a source of pressurized fluid and at least one wheel brake of a corresponding first or second pair of wheels. The accumulator assembly includes a medium pressure accumulator, a nonpowered MPA fill valve interposed fluidically between a pump-side passage of the medium pressure accumulator and the source of pressurized hydraulic fluid, a powered MPA one-way valve interposed fluidically between a brake-side passage of the medium pressure accumulator and the at least one corresponding wheel brake, and an MPA check valve interposed fluidically between the brake-side passage of the MPA cavity and the at least one corresponding wheel brake. An electronic control unit is provided for controlling at least one of the secondary brake module and the master cylinder responsive to at least one braking signal. The accumulator assembly facilitates a non-powered evac / fill phase of lifetime operation of the brake system.

The present application belongs to the field of three-way stop valve, especially to an adjustable three-way stop valve, aiming at the problem of the existing three-way stop valve that the internal parts of the valve wear during use, causing the sealing to be not tight and foreign matters to be easily stuck in the valve, the present application proposes the following scheme, which comprises a valve body bearing medium pressure and a spherical valve controlling the flow of fluid in the channel, the spherical valve is located in the interior of the valve body, a T-shaped through hole is opened in the interior of the spherical valve, a pneumatic transmission device for power output is arranged on the top of the valve body, in the present application, by arranging the valve body, the spherical valve, the T-shaped through hole, the pneumatic transmission device, the mounting frame, the connecting piece, the telescopic transmission structure, the rotary sealing structure, the first transmission gear and the rotary transmission structure, the problem of the existing three-way stop valve that the internal parts of the valve wear during use, causing the sealing to be not tight and foreign matters to be easily stuck in the valve is solved.

The application provides a small-power high-speed compressor head, and belongs to the technical field of piston compressors. The small-power high-speed compressor head comprises a machine box and a crank connecting rod mechanism, the crank connecting rod mechanism is installed in the machine box, connecting arms are fixedly installed on the two side end walls of the machine box, guide connecting grooves are formed in the inner walls of the four connecting arms, and connecting rods are slidably connected to the inner walls of the guide connecting grooves. The first compression part, the second compression part and the combined compression part are provided as three types of special compression modules, the first compression part is suitable for natural gas and other medium-low pressure pure gas pressure boosting, the second compression part is suitable for ammonia gas and other multi-source gas pressure boosting, and the combined compression part is suitable for carbon dioxide, hydrogen and other super-high pressure gas pressure boosting. Meanwhile, the small-power high-speed compressor head can meet the multi-medium pressure boosting demand in the space-limited environment such as vehicle-mounted and pry-mounted environments, and the application scene can be switched without replacing the whole machine.

The invention relates to the technical field of soil testing, and discloses a lateral pressure adjustable expansive soil expansion rate measuring device, which comprises an experiment box, a sample cylinder and a measuring module, symmetrical through holes are formed in the side wall of the sample cylinder, a lateral pressure loading system is correspondingly arranged on the outer side of each through hole, and each lateral pressure loading system comprises a rigid piston head capable of extending into the cylinder, a piston rod, a closed medium pressure cavity and a miniature constant pressure pump; the pump is connected with the pressure cavity through a pipeline, and the piston head is driven to apply adjustable lateral pressure to the sample by accurately feeding and discharging a medium; the measurement module comprises a vertical deformation and lateral pressure measurement system and integrates free expansion and lateral confinement expansion measurement functions; the rigid piston and the water medium are adopted for constant-pressure loading, the structure is simplified, operation is convenient and fast, rapid response and high-stability control over lateral pressure are achieved, the membrane embedding effect is thoroughly eliminated, a multi-stage constraint continuous test can be completed through one-time sample loading, and the test efficiency and data consistency are remarkably improved.

The invention discloses an angle correction mechanism for negative angle machining, and relates to the field of negative angle machining. The angle correction mechanism for negative angle machining comprises a fixed table, a recognition device, a first correction rod, a second correction rod, a first monitoring device, a mounting frame, a workpiece pushing claw and a conveying piece. According to the angle correction mechanism for negative angle machining, the structure that the first monitoring device is installed on the upper pressing die in the negative angle machining device is adopted, and before a workpiece is corrected, the static distances between the first monitoring straight groove and the second monitoring straight groove are obtained through the first displacement sensor and the second displacement sensor; in the negative angle forming process, the dynamic distance between a second displacement sensor and a second monitoring straight groove is obtained through the second displacement sensor, data are transmitted to a medium-pressure controller through a transmission piece, the medium-pressure controller processes and evaluates the data, whether the movable plate in the negative angle machining device drifts due to long-term use or not is judged, and the negative angle forming process is completed. The correction mechanism failure is effectively avoided.

The application provides a kind of pipeline medium pressure non-contact measurement method and device based on ultrasonic surface wave, the method is by fixing ultrasonic surface wave transceiver module TRA and ultrasonic surface wave transceiver module TRB on the pipeline to be detected, parallel to the central axis of the pipeline to be measured;Start the measurement program of industrial computer, and set the measurement threshold;Get the ultrasonic surface wave propagation time t0 in zero pressure state;The pressure value P of real-time pipeline medium is calculated by the pressure calculation formula based on thickness correction index, and the final pressure value is obtained after averaging;The application can realize high-precision and high-accuracy non-contact measurement of pipeline medium pressure, the detection resolution is greatly improved, and the ultrasonic surface wave only propagates in the surface layer of the pipe wall, the signal transmission loss is small, is not affected by the nature of the medium inside the pipeline, can effectively improve the accuracy of measurement results, can be used for electric vehicle related facility manufacturing, realizes high-accuracy non-contact measurement of pipeline fluid pressure measurement.

The invention belongs to the technical field of manipulator automatic control, and discloses a manipulator grabbing and releasing control valve which comprises a connecting plate, and vacuum generators are installed and connected to the top of the connecting plate at equal intervals. Core components such as the vacuum generator, the direct-acting electromagnetic valve and the terminal strip are integrated through the connecting plate, traditional distributed pipeline connection is replaced, and pipeline redundancy is reduced; a valve element of the direct-acting type electromagnetic valve is directly driven by electromagnetic force and a reset spring and does not need to depend on medium pressure difference, the response time from power obtaining to vacuum generation and from power failure to automatic vacuum breaking is shortened, and the single-time grabbing and releasing circulation efficiency of the mechanical arm is greatly improved. The vacuum generator can work within the wide pressure range of the positive pressure ranging from 1 MP to 0.8 MP or the negative pressure ranging from 10 < 2 > KP to 0.1 MP, the grabbing requirement under the conventional atmospheric environment can be met, the vacuum generator can also adapt to low-vacuum scene operation, the problem that a traditional vacuum generator is high in fault rate under the special environment is solved, and actual application and operation are facilitated.

The invention relates to the technical field of flat valves, and discloses a self-sensing heat balance regulation and control high-temperature flat valve which comprises a valve body, a valve cover, a valve seat arranged in the valve body, a gate plate ascending and descending in the valve body to open and close a flow channel, a valve rod connected with the gate plate and a self-sensing heat balance regulation and control system. The self-sensing heat balance regulation and control system comprises a multi-parameter sensing unit and a control unit, wherein the multi-parameter sensing unit comprises a plurality of sensors used for acquiring temperatures, opening and closing torques and medium pressures of all positions of a flat valve; the regulation and control unit is configured to generate a thermal imbalance state criterion based on the detection data of the plurality of sensors and output a regulation and control instruction; and the valve rod position adjusting unit is arranged at the valve rod penetrating-out channel of the valve cover, is matched with the valve rod, and is configured to automatically correct the position of the valve rod under the triggering of the regulation and control instruction. The state of the valve is monitored in real time, the geometric center of the valve rod is actively adjusted, the action reliability of the valve under temperature fluctuation is ensured, and equipment faults caused by heat jamming are avoided.

The present application relates to the field of parts of submarine sewage system, and discloses a manually adjusted constant pressure difference blow-off valve. In the state of dynamic balance, the elastic force of the adjusting spring is equal to the elastic force of the auxiliary spring and the pressure of the second piston cavity; the liquid pressure received by the upper part of the first piston is equal to the elastic force of the main spring and the pressure of the piston in the rear cavity of the main valve; and the medium pressure of the second piston cavity and the rear cavity of the main valve is the same. By setting the pilot valve as a sensitive element, the signal of the hand wheel is amplified, thereby expanding the pressure adjustment range of the rear cavity of the main valve; and the outlet pressure of the valve connected with the rear cavity of the main valve is continuously adjustable, so that the blow-off pressure of the valve outlet can be adjusted according to the different diving depth of the submarine, and the appropriate sewage air supply pressure can be selected. By adopting the constant pressure difference blow-off valve, the air supply pressure and blow-off speed of the blow-off sewage are reduced, the amount of compressed air discharged to the outside of the hull is reduced, and the vibration of the sewage pipeline and the sewage transient noise can be effectively reduced.

The invention relates to a system of a subcritical thermal power generating unit. The nuclear reactor is respectively connected with a condenser and a high-pressure heater through a water conveying pipeline; a first outlet of the nuclear reactor is connected to a low-pressure cylinder in the steam turbine through a steam pipeline via a low-pressure mixing heater; a second outlet of the nuclear reactor is connected to a reheater in the boiler through a steam pipeline via a medium-pressure heater, and the reheater is connected to a medium-pressure cylinder of the steam turbine through a steam pipeline; a third outlet of the nuclear reactor is input to a boiler through a high-pressure heater through a water conveying pipeline; the boiler is connected to a high-pressure cylinder of the turbine through a steam pipeline; the high-pressure heater and the high-pressure cylinder are connected with the medium-pressure heater through steam pipelines. The low-pressure mixing heater is also connected with the medium-pressure cylinder through a steam pipeline; the steam turbine and the generator are coaxially arranged, and the high-pressure cylinder, the medium-pressure cylinder and the low-pressure cylinder expand step by step to drive the generator to rotate to generate electricity. By means of the system, carbon emission can be reduced.

The utility model discloses a valve seat sealing ring capable of adjusting sealing performance, which relates to the technical field of valve seat sealing rings, and aims to solve the technical problem that the valve seat sealing ring cannot be adjusted according to medium pressure fluctuation or working condition change at present, the valve seat sealing ring comprises a valve body, the inner wall of the valve body is provided with thread grooves which are axially distributed, and the inner wall of the valve body is provided with a thread ring in a threaded manner; an adjusting ring is fixedly installed in the threaded ring, a sealing ring is installed on the screwing-in face of the adjusting ring in a nested mode, and elastic fins are evenly distributed in the adjusting ring in the circumferential direction. The adjusting ring is driven by the threaded ring to move axially, the compression amount of the sealing ring is adjusted by combining the stepped clamping structure of the adjusting clamping block and the adjusting clamping groove, after the sealing ring is damaged, the compression amount of the sealing ring can be continuously adjusted by rotating the adjusting ring, the sealing ring does not need to be replaced immediately, emergency use is facilitated, and the service life of the sealing ring is prolonged. The problem that the current sealing ring needs to be replaced immediately after being damaged, and continuous operation of a system is affected is solved.

1. The name of the design product: coplanar pressure transmitter. 2. The use of the design product: an industrial automation instrument for measuring the pressure (or differential pressure) of medium such as liquid, gas or vapor, and converting the pressure signal into standard electrical signal (such as 4-20mA) output, so as to realize remote monitoring, control or recording of the medium pressure parameter, the core feature of which is that the pressure tapping and the transmitter measuring chamber are in the same plane. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

Measuring device for installation in a switchboard (1) of a high- or medium-voltage system, comprising a housing (2) for mounting in a mounting opening (4) of the switchboard (1), wherein the housing (2) has at least one support surface (10) extending perpendicular to a mounting direction (M) for resting on the switchboard (1) in the edge region of the mounting opening (4), wherein the housing (2) has at least one locking element (12, 12a) movably arranged on its circumference, which is movably arranged relative to the housing (2) such that the locking element (12, 12a) can be moved from a locked position to a released position and back, wherein the housing (2) is clamped in the mounting opening (4) in the locked position and can be removed from the mounting opening (4) in the released position, characterized in that the housing (2) has a stepped surface extending in the mounting direction (M) in the area of ​​the locking element (12, 12a). (24) exhibitswhich projects into the housing (2) with a depth (T) perpendicular to the mounting direction (M) and forms a pocket (26), wherein the locking means (12, 12a) is movably mounted in the pocket (26) and by means of the movement of the locking means (12, 12a) from the release position to the locking position, the receiving circumference of the housing (2) is at least partially increased, so that in the mounted state the housing (2) is clamped at least partially perpendicular to the mounting direction (M) against an inner side (16) of the mounting opening (4), and by means of the movement of the locking means (12, 12a) from the locking position to the release position, the receiving circumference of the housing (2) is at least partially decreased, and the housing (2) has formed at least one elastic clamping arm (18a) in the area of ​​the locking means (12, 12a), which extends from a beginning integrally formed with the housing (2) towards an open end in the direction of the mounting direction (M). (20a) extendsand the open end (20a) projects perpendicularly from the housing (2) to the mounting direction (M), the clamping arm (18a) bearing against the locking means (12, 12a) in the locking position, so that the receiving circumference is increased at least in the area of ​​the open end (20a) by means of the movement of the locking means (12, 12a) from the release position to the locking position, and the open end (20a) is clamped at least partially perpendicularly to the mounting direction (M) against the inside (16) of the mounting opening (4) in the mounted state, and the receiving circumference of the housing (2) is reduced by means of an elastic re-deformation of the clamping arms (18a) by means of the movement of the locking means (12, 12a) from the locking position to the release position, so that the housing (2) can be removed from the mounting opening (4) against the mounting direction (M).

The invention discloses a polyurethane modified two-component acrylate grouting leaking stoppage material construction method and system, and the method comprises the steps: determining crack and environmental parameters through early-stage investigation, determining grouting parameters and grouting nozzle arrangement spacing according to the crack type and the environmental parameters, and formulating a pretreatment scheme and a monitoring scheme; pretreating crack pollutants and defects by adopting physical-chemical-structural enhancement; accurate mixing of the A component and the B component is achieved through the double-liquid grouting pump and the dynamic mixer; gradient pressure grouting of low-pressure permeation, medium-pressure filling and high-pressure compaction is adopted; construction parameters are dynamically adjusted through pressure-flow-ultrasonic multi-parameter real-time monitoring; and finally, the construction effect is ensured through standard post-treatment and quality acceptance. The method can adapt to microcrack, high water pressure, acid-base and other complex working conditions, the construction efficiency is improved by 50%, the leaking stoppage success rate is larger than or equal to 95%, the secondary leakage rate is smaller than or equal to 5%, and the method can be suitable for leaking stoppage construction of subways, pipe galleries, dams and other projects.

This invention discloses a process for refining crude methanol with high water content. The crude methanol with high water content enters a pre-distillation tower, and the bottom products are then fed into a pressurized tower and a medium-pressure tower, respectively. The bottom product of the pressurized tower enters an atmospheric tower, and the bottom product of the medium-pressure tower enters a negative-pressure tower. The top products of the atmospheric tower and the bottom products of the negative-pressure tower enter a recovery tower. The top of the pre-distillation tower heats the reboiler of the negative-pressure tower, the top of the pressurized tower heats the reboiler of the medium-pressure tower, the top of the medium-pressure tower heats the reboiler of the atmospheric tower, and the top of the atmospheric tower heats the reboilers of both the pre-distillation tower and the recovery tower. The top of the recovery tower heats the reboiler of the negative-pressure tower. Simultaneously, the bottom products of the pre-distillation tower, pressurized tower, medium-pressure tower, and recovery tower are used to preheat their respective feeds. This invention employs parallel flow splitting and multi-effect thermal coupling technology, which significantly reduces the energy consumption of high-water-content crude methanol refining without relying on high-power heat pumps. Steam consumption can be reduced to below 0.56 tons / ton of refined methanol, and it has the advantages of low energy consumption, simple control, and wide applicability.