374 results about "Working pressure" patented technology

The invention relates to the technical field of petrochemical equipment sealing, in particular to a flange sealing performance evaluation method based on bolt axial stress, which comprises the following steps: establishing a nonlinear stress relationship between a gasket and bolt axial force; establishing a relationship between the axial stress of the bolt and the sealing contact stress of the contact surface of the gasket under different working pressures; constructing a three-dimensional model of a real sealing surface; establishing a three-dimensional model of the sealing surface contact process; obtaining the change of a leakage gap between the contact surfaces under different contact stresses, and establishing a relation model of the leakage gap of the contact interface and the sealing contact stress; establishing a quantitative evaluation model among the sealing contact stress, the leakage clearance and the leakage rate; obtaining the contact stress under the actual working condition, and calculating whether the corresponding leakage rate meets the tightness judgment standard or not so as to judge the sealing state of the flange. The invention aims to solve the technical problem that the metal sealing performance of in-service flange connection cannot be quantitatively and online evaluated in the prior art.

The invention belongs to the technical field of shoe sole waste recycling treatment, and discloses a shoe sole processing waste recycling device which comprises a crushing box, two groups of crushing rollers are rotatably arranged on the inner side of the crushing box, linkage pressure applying assemblies are arranged on the two sides of the crushing rollers, and each linkage pressure applying assembly comprises two groups of limiting guide columns. According to the crushing device, through cooperation of structures such as the linkage pressure applying assembly and the crushing rollers, power can be provided for the pressure applying device when the crushing rollers rotate, it is guaranteed that downward pressure is provided while the crushing rollers rotate, and the crushing efficiency is improved; and therefore, the problems that the normal crushing treatment is influenced due to accumulation or clamping stagnation caused by the fact that rubber cannot be quickly concentrated between the crushing rollers, and the working pressure of workers is greatly increased are effectively solved.

The invention relates to the technical field of compressor temperature control, and discloses a compressor temperature control system capable of preventing generation of condensate water, which comprises a sensing module, an execution module and a controller. The sensing module is used for collecting air temperature, relative humidity, system working pressure and circulating oil temperature parameters of the compressor in real time. The controller is configured to calculate the current pressure dew point of the system based on the air temperature, the relative humidity and the working pressure of the system; the pressure dew point serves as a floating lower limit, a preset system optimal working temperature upper limit serves as a fixed upper limit, and a dynamic safe working interval is determined; finally, a cooling unit and a heating unit in the execution module are cooperatively controlled to work according to the relation between the circulating oil temperature and the dynamic safety working interval. By establishing the dynamic safety lower limit changing along with the working condition, the problem that the compressor is prone to generating condensate water under the high-humidity or low-load working condition to cause oil emulsification is effectively solved, and accurate and energy-saving temperature control is achieved.

The present disclosure provides a solution for a system and a method for converting heat into work. The solution makes use of a nozzle, in which pressurized heat transfer liquid (HTL) and a Liquid-Vapor-Phase-Changing (LVPhC) working fluid is about the same pressure are mixed to form a LVPhC-HTL mixture, which in turn undergoes evaporation and isothermal or quasi-isothermal expansion while flowing in the nozzle that results in acceleration of the mixture. The accelerated mixture is ejected from to thereby rotate a turbine and produce work from the generated kinetic energy. The LVPhC is separated from the mixture and condensed after its ejection from the nozzle and its pressure is elevated back to the working pressure in the nozzle. The present solution exploits the thermodynamic advantages of each phase of the LVPhC.

The invention discloses an intelligent anti-impact control method for a mining remote water seal system. The method aims to solve the problem of water hammer impact caused by quick opening of a valve during remote quick water injection. The method comprises the steps that after a remote water injection instruction is received, a pneumatic valve is controlled to be opened; in the valve opening process, real-time pressure data in the water supply pipeline are obtained; and based on the real-time pressure data, the opening process of the pneumatic valve is intelligently adjusted so as to restrain pressure impact in the pipeline. The method is characterized in that the opening rate of the valve is nonlinearly adjusted according to the pressure safety margin ratio among the real-time pressure, the set maximum safety pressure threshold value and the target steady-state working pressure through a self-adaptive rate feed-forward control model. According to the invention, active suppression can be realized at the initial stage of water hammer impact formation, the pressure peak value is limited within a safety threshold value, and safe, rapid and self-adaptive anti-impact water injection control is realized.

A steam compressor, specifically a multistage centrifugal compressor which could have an operating pressure between 0.2 bar and 12 bar and be used in industrial processes with heat pumps or for the mechanical compression of steam in general.The present invention is to improve the state of the art for steam compressors by means of an optimized architecture that minimizes the manufacturing cost, such that it makes it comparable to that of a fan, without compromising its typical performance.

The application discloses a kind of high-pressure fuel filter prediction model construction method and flow prediction method, including two prediction models, method specifically includes: using computational fluid dynamics method carries out fluid dynamics simulation calculation to high-pressure fuel filter, constructs working condition sample data set;The size of filter hole, quantity, filter working pressure, fuel viscosity and filter pressure drop are used as input variable, and filter flow is used as output variable, two new high-pressure filter general nonlinear flow prediction models are established using artificial neural network and regression prediction method respectively, the flow characteristics of different models of filter in working interval can be accurately predicted using the neural network prediction method proposed in the application at any working condition point, and the error is low;The flow of different models of filter under different conditions can be quickly and accurately obtained, the accuracy meets the engineering needs, while greatly shortening the experimental time and calculation time, saving design cost.

A control method for controlling the operating state of a rotary press (1) for forming tablets (100), wherein the rotary press (1) is a rotary compression turret (2), and includes a die table (3) on which a plurality of dies (4) are provided along the circumferential portion of the rotary compression turret (2), a plurality of lower punches (6) and a plurality of corresponding upper punches (5) associated in pairs with each die (4), the lower punches (6) and the upper punches (5) each having a substantially cylindrical body with contact ends into which a lower compression roller (12) and an upper compression roller (11) respectively abut, and a supply station (7), the control method for controlling the operating pressure of the lower compression roller (12) and the upper compression roller (11) The system comprises a control system (20) for controlling the operation, and includes a detection step in which the supply of powder (50) to the die (4) is blocked during the detection step so that there is at least one empty die (4a), the lower punch (6) and / or upper punch (5) are moved toward the at least one empty die (4a) by the respective lower and / or upper compression means, and a pressure resistance value is measured by the detection means (14) as the value of the pressure applied by the respective lower and / or upper compression means to the corresponding lower punch (6) and / or upper punch (5) as they are moved inside the at least one empty die (4a); and an evaluation step in which the pressure resistance value is processed by the control system (20) to generate a signal relating to the punch operation state.

A method for operating a fluid system, which has a control device with a control functionality and a piezoelectric valve assembly that can be controlled by the control device. The method involves the following steps: providing a target working pressure at the working connection, measurement of the actual working pressure at the working connection by the pressure sensor, transmitting the measurement data to the control device and applying the algorithm to compare the actual working pressure with the target working pressure, activating the at least one integrator to integrate the control deviation of the control voltage (=offset voltage) after the actual working pressure is constant over a certain time period, and changing the control voltage as a function of the determined target / actual deviation taking into account the integrator operation.

A pneumatic clutch control device of a railway vehicle comprises an air supply pipeline and a two-position three-way electromagnetic valve. The air supply pipeline is communicated between a main air reservoir of the railway vehicle air compression system and an air inlet of the pneumatic clutch; two ports of the two-position three-way electromagnetic valve are communicated with the air supply pipeline, and the other port of the two-position three-way electromagnetic valve is introduced into external atmosphere; a pressure switch I is arranged on the air supply pipeline between the two-position three-way electromagnetic valve and the pneumatic clutch; the set value of the pressure switch I is greater than the minimum value of the normal working pressure of the pneumatic clutch; a non-backpressure one-way valve and a pressure stabilizing air cylinder are sequentially arranged on the air supply pipeline between the main air cylinder and the two-position three-way electromagnetic valve; the pressure stabilizing air cylinder is provided with a second pressure switch, and the set value of the second pressure switch is larger than the maximum value of normal working pressure of the pneumatic clutch. And the controller can receive signals of the first pressure switch and the second pressure switch so as to control the two-position three-way electromagnetic valve. The boosting time of the clutch air cavity is shortened, friction plate loss in the boosting process is reduced, and the pressure is more stable when the pneumatic clutch works.

This invention belongs to the field of clamping fixture technology, specifically a clamping fixture for casting production and processing and its operating method. The clamping fixture includes a crossbeam, with a hydraulic cylinder fixedly connected to the top of the crossbeam and a set of hangers fixedly connected to the bottom of the crossbeam. Each set of hangers has a set of crossbars fixedly connected to it, and each set of crossbars is slidably connected to a limiting seat. A movable seat is fixedly connected to the bottom of each of the two limiting seats, and a mounting arm is fixedly connected to the bottom of each of the two movable seats. Mounting plates are fixedly connected to the bottom of opposite sides of each of the two mounting arms. Floating chucks are provided on the mounting plates, and support components are provided on each of the two mounting arms. This invention, by setting multiple sets of floating chucks on the mounting plates on both sides, can tightly fit the outer walls of both sides of the cylinder head, better clamping and fixing the cylinder head. By setting the support components, after the floating chucks clamp the cylinder head, they can support the cylinder head from below, reducing the working pressure of the floating chucks and preventing excessive clamping force from damaging the cylinder head surface.

The invention discloses a control system of an outboard engine and the outboard engine. A multi-sensor module is used for collecting the posture of a ship body, the water pressure of the outboard engine, the navigational speed and the navigational direction; the main control module is connected with the multi-sensor module and used for processing the ship body posture, the outboard engine water pressure, the navigational speed and the navigational direction collected by the multi-sensor module and generating a control instruction. The tilting angle module is connected with the main control module and used for adjusting the pitching angle of the outboard engine according to the control instruction; the vertical lifting module is connected with the main control module and used for adjusting the vertical height of the outboard engine according to the control instruction. According to the control system of the outboard engine, self-adaptive adjustment of the warping angle and the vertical height of the outboard engine can be achieved, so that the operation difficulty is reduced, and the working pressure of a driver is relieved.

The utility model relates to natural gas pipeline production and processing technical field discloses a kind of natural gas pipeline elbow hydraulic forming machine, comprising: rack, the cavity of rack is movably connected with carousel, the top of carousel is provided with lower mould, carousel is discoid;Support, support is fixedly connected in the rear wall top of rack, the bottom of electric cylinder is fixedly connected with upper mould;Automatic structure, automatic structure includes: base plate, trigger block, give way slot and collection groove, base plate is fixedly connected in the cavity of rack, trigger block is fixedly connected in the top of base plate, give way slot is opened in the bottom of carousel, collection groove is opened in the top of carousel, automatic structure can realize automatically and unload the pipeline elbow of pressing molding from device, only need worker to place elbow blank in lower mould top to carry out pressing molding and collect elbow discharged from collection pipe during working process, to make the present scheme not only reduce the working pressure of worker, still can indirectly promote production efficiency.

The utility model discloses an air clamp with stable clamping force, which comprises a base, an air cylinder is fixedly connected on the base, a slot position is arranged on the base, a wedge plate is in sliding contact in the slot position, the wedge plate abuts against the inner wall of one side of the slot position, an output shaft of the air cylinder is connected with the wedge plate, a first clamping plate is in sliding connection in the slot position, and a second clamping plate is arranged in the first clamping plate. The wedge plate and the first clamping plate extend to form wedge blocks, the wedge blocks of the wedge plate abut against the wedge blocks of the first clamping plate, the sliding path of the wedge plate is perpendicular to the sliding path of the first clamping plate, and a clamping area is formed between the first clamping plate and the inner wall of the other side of the groove position. According to the air clamp stable in clamping force, the air cylinder pushes the first clamping plate to clamp a pin through the wedge plate, and the working pressure of the air cylinder is reduced.

A lubricating system is disclosed. The lubricating system includes: at least one first to-be-lubricated component, wherein an inlet of each of the at least one first to-be-lubricated component is connected with a first lubrication oil inlet pipe, and an outlet of the each of the at least one first to-be-lubricated component is connected with a first lubrication oil outlet pipe; and at least one second to-be-lubricated component, wherein an inlet of each of the second to-be-lubricated component is connected with a second lubrication oil inlet pipe, and an outlet of the each of the at least one second to-be-lubricated component is connected with a second lubrication oil outlet pipe. An operating pressure of the each of the at least one first to-be-lubricated component is different from a working pressure of the each of the at least one second to-be-lubricated component.

The utility model relates to the technical field of cutting devices, in particular to a die-casting aluminum stub bar cutting machine which mainly comprises a cutting device body, an air cylinder is arranged on the cutting device body, a pressing plate is arranged at the arrangement end of the air cylinder, a product and a replacement assembly are arranged on the cutting device body, and the replacement assembly is arranged at the output end of the air cylinder. The replacement assembly comprises a mounting plate arranged at the output end of the air cylinder, a limiting block is arranged on the mounting plate, a through groove is formed in the pressing plate, and the replacement assembly is used for replacing the pressing plate; the dustproof assembly is arranged on the mounting plate, the dustproof assembly comprises a clamping plate arranged on the mounting plate, a rubber plate is arranged on the mounting plate, a convex block is arranged on the rubber plate, and the dustproof assembly is used for preventing dust from entering. According to the die-casting aluminum stub bar cutting machine, the mounting plate is aligned with the containing groove to be placed, and the two-way lead screw is controlled to rotate, so that two sets of limiting blocks can be driven to slide into the through groove, rapid replacement of the pressing plate can be achieved, the working pressure of workers can be relieved, and the replacement difficulty is lowered; and therefore, the device can quickly cut products with different specifications.

The utility model discloses a hydraulic element pressure adjusting tool, which relates to the technical field of hydraulic element adjustment and comprises a bottom plate, a first long plate is fixedly mounted at the left end of the outer top surface of the bottom plate, a second long plate is arranged at the right end of the outer top surface of the bottom plate, and a first support plate and a second support plate are fixedly mounted on the outer top surfaces of the first long plate and the second long plate respectively. A reciprocating assembly used for driving the second long plate to move relatively along the outer top face of the bottom plate is arranged on the outer wall of the right side of the first long plate, a bearing assembly used for bearing a test workpiece is arranged on the outer top face of the second long plate, and a pressure sensor is fixedly installed in the center of the outer wall of the right side of the first supporting plate. According to the utility model, through the arrangement of the first bearing block and the second bearing block, the second supporting plate can fix the test workpiece on the second long plate, and the working pressure of the test workpiece is detected under the cooperation of the pressure sensor, so that the test workpiece can be stably tested without generating potential safety hazards after a piston is replaced and the test workpiece is detected.

The utility model relates to the technical field of dumper equipment, in particular to an electro-hydraulic single-control reversing valve which comprises a valve body and a valve element, the valve element is arranged in the valve body, a high-pressure cavity, a lifting cavity, an oil return cavity and a pressure relief cavity are formed in the two sides of the valve element in a boss type, and the valve element is arranged in the valve body. A spring washer, a reset spring and a right end cover are arranged at the right end of the valve element, a pressure measuring plug is arranged in the middle of the right end cover, the right end cover is fixedly connected with the valve body through a bolt, a sealing rubber ring is arranged between the right end cover and the valve body, and a right spring cavity is formed in the position of the reset spring. The one-way valve and the pre-pressing valve are arranged in the valve body, working pressure is provided for the electro-hydraulic reversing valve, the action of the valve body lies in integration of multiple hydraulic elements of the large-flow electro-hydraulic reversing valve, the risk of oil leakage is reduced, the structure is more compact, the size is small, the weight is light, machining is convenient, the reversing response speed is high, response is sensitive, and the reliability of the reversing valve is improved.

The invention relates to a valve arrangement (1; 81; 91) with several functional modules arranged in series from the group consisting of: valve disc group (8), safety valve group (7), throttle valve (171), wherein the valve disc group (8) has one or more valve discs (101, 102) each with at least one electrically controllable valve (103, 104) connected to an electrical supply line (17) and to a fluid supply line (18), wherein the throttle valve (171) is arranged upstream of the safety valve group (7) between a fluid port (36) and the fluid supply line (18) of the valve disc group (8), wherein the safety valve group (7) has two safety valves (51, 52) designed to control a fluid flow between the fluid port (36) and the fluid supply line (18).wherein the safety control (7) is configured for the safety-oriented blocking of electrical control signals for the safety valves (51, 52), wherein the throttle valve is configured for a temporary reduction of a working pressure in the fluid supply line (18) and wherein a valve control (5) is configured for controlling the valve disc group (8) and the safety valve group (7).

The invention relates to a gas spring (100) comprising: a gas-filled pressure chamber in a pressure tube (110); a working piston (120) which can be displaced in the pressure chamber along a travel axis (HA); a piston rod (140) fastened to the working piston (120) and guided out of the pressure tube (110) along a travel axis (HA) through a guide seal (130); and a separating piston (150) which is arranged on a side of the working piston (120) facing away from the guide seal (130) and which can be displaced along a stroke axis (HA) relative to the pressure tube (110) and relative to the working piston (120). The separating piston (150) divides the pressure chamber in a gas-tight manner into a working chamber (112) accommodating the working piston (120) and a support chamber (113). The gas spring (100) comprises a holding device (160). The holding device (160) holds the separating piston (150) stationary on the pressure tube (110) as long as a positive pressure difference between the support pressure of the gas in the support chamber (113) and the working pressure of the gas in the working chamber (112) is less than a predefined switching difference. The holding device (160) is designed in such a way that, as long as the positive pressure difference reaches or exceeds the switching difference, a switching force acting on the separating piston (150) caused by the positive pressure difference releases the separating piston (150) from the pressure tube (110) in such a way that the separating piston (150) can be moved towards the working piston (120).

The invention discloses a robot joint module thermal management system based on phase change working medium injection, and relates to the field of robots, and the system comprises a central high-pressure storage and supply unit which is used for storing a liquid phase change working medium and stabilizing the pressure of the liquid phase change working medium to a set working pressure; the flexible high-pressure common rail pipe network is connected with the central high-pressure storage and supply unit and is used for conveying the liquid phase change working medium to each joint module of the robot; the joint module cooling injection assemblies are arranged at the joint modules correspondingly, communicate with the flexible high-pressure common rail pipe network and are used for conducting pulse injection, phase change heat absorption and waste cold secondary utilization on the liquid phase change working media; and the hierarchical control subsystem is connected with the central high-pressure storage and supply unit and the joint module cooling injection assembly and used for controlling the injection flow of the liquid phase change working medium. The heat dissipation problem restricting the humanoid / quadruped robot from a test prototype to engineering application can be solved, and the thermal failure risk of the joint module is remarkably reduced.

The present invention relates to a method for operating a hydraulic system (10) of a motor vehicle transmission, wherein the hydraulic system (10) comprises: a hydraulic pump (12), a first hydraulic valve (26), a second hydraulic valve (28), and an oil pan (32). In a first method step, a diagnosis is performed on the first hydraulic valve (26), wherein if a defect in the first method step is identified, a second method step is performed to achieve a pressure reduction in the working pressure line (36), wherein in the second method step, the second hydraulic valve (28) is briefly moved to a second actuated position, in which a connection is established between the second working pressure port (44) of the second hydraulic valve (28) and the second actuated port (46) of the second hydraulic valve (28) by means of the second hydraulic valve (28), wherein subsequently, in a third method step, the second hydraulic valve (28) is moved to a second stationary position, in which a connection exists between the second actuated port (46) and the oil pan (32).

The invention discloses a fire-fighting equipment intelligent management system and method based on Internet of Things, and relates to the technical field of fire-fighting management. The method comprises the steps of obtaining a loss path and loss points and loss sections thereof, calculating on-way loss values and elevation loss values of all the loss sections on the spraying path, constructing a digital twin model of the fire-fighting spraying system, obtaining a loss parameter set of all the loss points, constructing a loss evaluation model, and outputting local loss values of all the loss points on the spraying path. The total lift of the spraying path is calculated, the most disadvantageous spraying head is selected, and whether the pressure value of the most disadvantageous spraying head is within the working pressure range or not is judged so that the rotating speed of the fire pump can be regulated and controlled till the pressure value of the most disadvantageous spraying head is within the working pressure range; under the condition that the working pressure range of each spray head is met, a flexible regulation and control mechanism can be realized for the fire pump, and the working energy consumption can be reduced.

The invention discloses a strong self-suction high-pressure external double-suction double-screw pump which comprises a pump body, a screw pair is arranged in the pump body, the screw pair comprises a driving screw and a driven screw, each of the two screws comprises a rotating shaft, a left helical casing and a right helical casing, the left helical casing and the right helical casing are fixedly arranged on the periphery of the rotating shaft, and the rotating shafts, the left helical casing and the right helical casing are made into a whole; the left spiral sleeve and the right spiral sleeve on each screw are provided with tooth-shaped grooves with the same shape, the thread turning directions of the left spiral sleeve and the right spiral sleeve are opposite, and the surfaces of the tooth-shaped grooves are covered with wear-resistant rubber layers; and the left helical casing and the right helical casing on the driving screw are correspondingly meshed and paired with the right helical casing and the left helical casing on the driven screw. The screw rod pair adopts an integrated design, so that the structural rigidity is enhanced, and the pump can bear higher working pressure; meanwhile, the tooth-shaped groove of the spiral sleeve is covered with the wear-resistant rubber layer, so that fine control over the meshing clearance of the screw is achieved, medium backflow is greatly reduced, and the self-suction efficiency and the volume efficiency are improved.

The present application relates to hydraulic valve, disclose a kind of liquid-filled valve, including energy accumulator (1) and the working oil path connected with inlet (P) and working oil port (A), the working oil path is provided with check valve (2), the energy accumulator (1) is connected with the reverse oil port of check valve (2), further comprising hydraulic control reversing valve (3) and hydraulic bridge path, the hydraulic control reversing valve (3) includes the first oil port (B1) connected with the inlet (P), the second oil port (B2) connected with return oil port (T) and the third oil port (B3) connected with the hydraulic bridge path, the energy accumulator (1) and the hydraulic bridge path are respectively connected with the hydraulic control port of the hydraulic control reversing valve (3), to control the switching of the hydraulic control reversing valve (3).The present application also discloses a kind of running hydraulic brake system and running hydraulic steering system.The liquid-filled valve of the present application increases the width of energy accumulator working pressure interval, with wide-range pressure maintaining function.

The invention discloses a composite riveting connection structure of an automobile shock absorber hydraulic hose, which comprises a hose, a connection joint and a riveting claw, the hose is a braided wire reinforced rubber hose, the connection joint comprises a lining core and a steel sleeve, one end of the lining core is welded with a hard pipe, and the other end of the lining core is inserted into the hose; the end, inserted into the hose, of the lining core is sleeved with a steel sleeve, the steel sleeve is sequentially provided with a flat riveting fastening section and a point riveting buffering section in the axial direction of the steel sleeve, the flat riveting fastening section and the point riveting buffering section are coaxially and integrally formed, the flat riveting fastening section is a full-circumference compression area with inner protrusions of the steel sleeve, and the point riveting buffering section is a local compression area with circumferential arc-shaped protrusions after extrusion. The riveting claw extrudes the steel sleeve to achieve fixed connection of the hose and the lining core, and bosses matched with the flat riveting fastening section and the point riveting buffering section respectively are arranged in the riveting claw. The braided wire reinforced hose with the inner diameter of 5-12 mm is matched, the tensile strength is larger than or equal to 11 kN under the working pressure of 13-35 MPa, the ultimate pulse service life reaches 2,000,000-2,000,000 times, and the lightweight and high-pressure performance requirements of new energy automobile suspension shock absorbers are met.

This invention belongs to the field of testing technology, specifically relating to a dynamic shear test device and method for a flexible connection assembly of an aircraft fuel system. The test device includes a reciprocating assembly, a clamping assembly, and a loading assembly. A second push block in the reciprocating assembly is connected to a first locking block in the clamping assembly. The loading assembly is located on one side of the clamping assembly. The reciprocating assembly applies a shear load to the flexible connection assembly. The clamping assembly is responsible for clamping and fixing the test tube. The loading assembly injects pressure into the test tube. By connecting two test tubes using the flexible connection assembly, and controlling the pressurization module in the loading assembly to pressurize the test tube and the electric cylinder in the reciprocating assembly to apply thrust to the test tube, the internal working pressure and external shear load of the flexible connection assembly are tested. This provides standard equipment and methods for conducting life testing research on flexible connection assemblies, and also provides a reference for the selection of flexible connection assemblies.

The utility model discloses a ceramic body glazing device which comprises a hand-held rod, the outer wall of the hand-held rod is fixedly connected with an opening blocking plate, a cavity is formed in the hand-held rod, an electric cylinder is installed in the cavity, the top of the electric cylinder is provided with a storage battery, the electric cylinder is electrically connected with the storage battery, and the storage battery is electrically connected with the hand-held rod. A first supporting assembly, a second supporting assembly, a third supporting assembly and a fourth supporting assembly are arranged on the outer wall of the hand lifting rod, and the second supporting assembly, the third supporting assembly and the fourth supporting assembly are the same as the first supporting assembly in structure. The first supporting assembly comprises an electric cylinder installed in the hand lifting rod, one end of the electric cylinder is connected with a supporting plate, the outer wall of the supporting plate is sleeved with the opening blocking plate, and the lower end of the supporting plate is sleeved with a to-be-machined ceramic body. According to the device, the to-be-machined ceramic green body can be automatically fixed, the to-be-machined ceramic green body does not need to be fixed by hands, the fixing firmness of the to-be-machined ceramic green body is improved, and the working pressure of the hands of workers is relieved.

According to the battery loop, a first inlet of a first three-way valve is connected with an outlet of a battery; a second inlet of the first three-way valve is connected with an inlet of the battery in parallel; an outlet of the first three-way valve is connected with an inlet of the cooler. Compared with the prior art, according to the scheme provided by the invention, the cooler is arranged behind the battery, and the cooling liquid flows into the cooler after passing through the battery by controlling the first inlet of the first three-way valve to be communicated, so that the heat of the cooling liquid can be absorbed by the battery, the temperature of the cooling liquid is reduced, and the inlet temperature of the cooler is also relatively low; therefore, the working pressure of the cooler is prevented from being increased due to overhigh water, the working efficiency of the cooler is improved, and energy consumption is reduced.