51results about How to "Optimize the assembly method" patented technology

The invention relates to a chassis with a bus structure. The chassis comprises a sleeve, an instrument frame and a main control panel, wherein the instrument frame is arranged in the sleeve; a module card entrance is arranged at the rear end wall of the instrument frame; a power-supply module socket is arranged on the side wall of the instrument frame; a module card guide rail and the main control panel are arranged in the instrument frame; the main control panel is arranged on the side wall of the module card guide rail and is connected with the power-supply module which is arranged on the power-supply module socket; the instrument frame is fixedly connected by inserting a front frame and a rear frame; a bus rear panel is longitudinally arranged in the front frame; the module card is inserted into the module card guide rail through the module card entrance and is socketed with the bus rear panel; and the module card guide rail is connected with the rear frame and the front frame respectively in a clamping and hooking way. According to the chassis with the bus structure, the design difficult point of an instrument in a compact space is solved, as the internal main structures and the main control panel are all assembled by self-locking structure assembles such as plugging, clamping and hooking, the chassis is high in assembling efficiency, compact in structure and high in installation reliability.

The invention discloses a novel turbodrill capable of achieving accurate positioning of a stator and a rotor. The novel turbodrill is applied to the fields of petroleum drilling, mining, geological drilling and the like and solves the problem that the hydraulic performance of turbine sections is low when the turbodrill works. According to the technical scheme, the turbine stator is fixedly installed on a turbine shaft through a screw and a fastening nut, and the inner wall of a shell and the outer wall of each stage of a stator sleeve are provided with two symmetric key grooves to position the turbine stator in a flat key mode; the turbine shaft and a rotor sleeve are both machined to be regular octagon structures which are mutually matched; a thrust bearing set is installed on the middle-back section of the turbine shaft; a planetary gear reducer is arranged in a lower shell. According to the novel turbodrill, by means of the two methods that the turbine rotor and the turbine stator are fixed in the circumferential direction, it is guaranteed that the stator and the rotor cannot relatively rotate separately and precise circumferential positioning of the stator and the rotor can be achieved, therefore, the hydraulic performance of the turbodrill is improved, and meanwhile the cost is lowered.

The invention provides an automatic wall plastering machine. The automatic wall plastering machine comprises a base, an upright and a moving body; the moving body moves up and down on the upright as a track; a push plate is arranged on the frontage of the moving body and hinged to the front face; an electronic push rod and a first elastic telescopic rod are mounted on the two sides of the push plate; one end of the electronic push rod is fixed with the moving body, while the other end of the electronic push rod is hinged to one end of the first elastic telescopic rod; the other end of the first elastic telescopic rod is hinged to the back surface of the push plate; a material plate is mounted above the push plate; a second elastic telescopic rod and a third elastic telescopic rod are mounted on the two sides of the moving body correspondingly to the front and rear ends of the material plate, respectively; one end of the second elastic telescopic rod is hinged to the moving body, while the other end of the second elastic telescopic rod is hinged to the front end of the material plate; one end of the third elastic telescopic rod is fixed with the moving body, while the other end of the third elastic telescopic rod is hinged to the rear end of the material plate; an included angle is formed between the material plate and the upper surface of the moving body. The automatic wall plastering machine has the advantages of stable operation, good plastering effect, high automation degree, high applicability and the like.

The invention discloses a roller screw rod with spacing bodies. The roller screw rod with the spacing bodies comprises a screw rod body, a screw nut, a backflow piece, a plurality of rollers and a plurality of spacing bodies. The screw nut is arranged on the screw rod in a sleeved mode, and a load path is formed between the screw rod body and the screw nut. The backflow piece is arranged on the screw nut and is provided with a backflow channel connected with the load path. The rollers are arranged in the load path, and each roller is provided with an external diameter face. The spacing bodies are arranged between every two rollers, the two sides of each spacing body are respectively provided with a maintaining concave part, and each maintaining concave part is provided with a vertical face and two slant faces. When the rollers are in the load path, the external diameter face of each roller is in contact with one of the slant faces, and when the rollers are in the backflow channel, the external diameter face of each roller is in contact with one vertical face. Thus, the roller screw rod with the spacing bodies has the effects that assembling is easy, the load capacity of the roller screw rod can be enhanced, and mutual interference with one another among the rollers can be avoided.

The invention discloses an LED illuminating lamp comprising a heat radiation base, a fixed support, a power supply box, a light enhancement shield, a light transmission shield and a fixed end cover, wherein the heat radiation base has a containing space; a dovetail groove and a T-shaped groove are arranged outside the heat radiation base; a positioning groove is arranged on the inner wall surfaceof the heat radiation base; a T-shaped block is arranged on the fixed support and inserted along the T-shaped groove; the fixed support is fixedly connected with the heat radiation base through screws; a dovetail inclined angle is arranged in the power supply box and inserted along the dovetail groove; the power supply box is fixedly connected with the heat radiation base through the screws; the light enhancement shield is arranged in the containing space; a plurality of grid grooves are arranged on the light enhancement shield; LED lamp bodies and lenses are arranged in the grid grooves; a positioning pillar is arranged on the fixed end cover and inserted along the positioning groove; and the fixed end cover is fixedly connected with the heat radiation base through the screws. The invention can ensure that the assembling of the parts is convenient by utilizing the bearing of the heat radiation base on the parts; the installation and the connection of the parts are more stable by utilizing the fixedly locking of the screws; and the LED illuminating lamp is suitable for popularization in markets.

The invention relates to a refrigerator, especially relates to a refrigerator with an iced water distributor, and specifically relates to a water pump in a refrigerator with an iced water distributor. The invention is designed for solving the problems that a water pump is easy to have friction with metals in the process of operating, large in noise, complicated in water pipe arrangement, low in productbility and waste in water pipe length, and the like. The refrigerator with an iced water distributor, provided by the invention, comprises a water storage tank, a water supply part, an ice maker and a water pump, wherein the water storage tank is arranged on the inner side of a door of a refrigerating chamber of the refrigerator, the water supply part and the ice maker are arranged on the inner side of the door of the refrigerating chamber of the refrigerator, a cavity is arranged in a lower decorative cover of the door of the refrigerating chamber of the refrigerator, the surface of a cavity body of the cavity is provided with a water inlet hole, a water outlet hole and a circuit connection box, and the water pump is placed in the cavity. According to the invention, the purposes of reducing noise, simplifying pipe arrangement, improving the productbility, saving pipe materials and making things convenient for customers are achieved.

The invention relates to the technical field of air conditioners and particularly discloses an air conditioner base part assembling structure. The air conditioner base part assembling structure comprises a base part, an air inlet panel part and an evaporator part which are connected fixedly, wherein an opening for a coil of the evaporator part to penetrate through is formed in the edge of the base part. The invention further discloses an air conditioner having the air conditioner base part assembling structure. The existing problems of required pipe penetration, pipe bending operation, easy pipeline damage, low safety and low production efficiency of an existing air conditioner base part assembling mode are effectively solved, the assembling mode is optimized, the pipe penetration and pipe bending operations are effectively avoided, pipeline damage is prevented, and the safety and production efficiency are improved.

The invention relates to the technical field of building engineering, in particular to a pipe rack channel and a construction method thereof. The pipe rack channel comprises a bottom plate, side plates and a top plate. the construction method comprises the following steps of S1, early-stage preparation, S2, foundation pit excavation, S3, foundation pit bottom pretreatment, S4, bottom plate laying,S5, side plate installation, S6, top plate installation, and S7, waterproof treatment and earthwork backfilling. The pipe rack channel and the construction method thereof have the beneficial effectsthat during transporting, the bottom plate, the side plates and the top plate are transported to the construction position, transport is convenient, in addition, the bottom plate, the side plates andthe top plate are directly assembled together in the construction position, the assembling mode is convenient, and the time is saved.

The invention relates to the technical field of connection fasteners, in particular to a special anti-loosening clamping connection lubricating fastener. According to the technical scheme adopted by the invention, the special anti-loosening clamping connection lubricating fastener comprises a rectangular main body connection assembling supporting structure; the front portion of the lower end of the main body connection assembling supporting structure is provided with an integrally formed connection supporting seat; the left side and the right side of the lower end of the connection supportingseat are provided with symmetrical clamping assembling fastening anti-loosening connection plates, and the front faces of the clamping assembling fastening anti-loosening connection plates are each provided with an arc-shaped clamping fastening anti-loosening groove; the depth of each clamping fastening anti-loosening groove is smaller than half of the width, in the front-back direction, of the corresponding clamping assembling fastening anti-loosening connection plate; and the front faces of the lower ends of the clamping assembling fastening anti-loosening connection plates are each providedwith a chamfering structure convenient to assemble. The special anti-loosening clamping connection lubricating fastener has the advantages that the stability of the overall structure in the using process is better, the service life is longer, the overall using effect is better, and the safety in the using process is more reliable.

The invention provides an automatic assembling and welding device and method for bent ribs. The welding device is formed by arranging an assembling device storage and grabbing portal frame, a panel clamping mechanism, a guide rail base, an overturning jig frame, and a welding portal frame. The welding device is used for automatically welding the bent ribs. According to the automatic assembling andwelding device and method for the bent ribs, automatic scanning, adjusting, assembling and welding functions of horizontal T-shaped section bars and bent T-shaped section bar ribs can be achieved, rib sections with the outer diameter ranging from 6 m to 11 m and horizontal T-shaped section bars with the length ranging from 1 m to 10 m can be machined, and the problem that welding reversible deformation is too large is solved. Tools can be saved, the construction period is shortened, the assembly precision is improved, construction is easy, and the assembly process can be effectively optimized. Meanwhile, the device has the advantages of simple and convenient assembly mode, high assembly precision, high efficiency and wide machining range. The method is suitable for being applied to automatic assembling and welding of the ship bent ribs.

The invention discloses an explosion-proof stainless steel alcohol lamp. The upper part of the stainless steel lamp tank forms a circular opening. There is a piece of cotton wool, and a lamp holder is sleeved on the upper end of the wick. The lamp holder is in the shape of a tube, and a serrated edge is formed on the upper edge of the lamp holder. The beneficial effects are as follows: 1. Substitute the traditional glass material with stainless steel, and carry out physical process treatment on the surface of the stainless steel, which effectively improves the safety factor and durability factor of the product, and is not easily affected by temperature to burst, avoiding fire incidents; 2. Improved The assembly method of the wick and the lamp cap is improved, the structure of the lamp cap is improved, and the stability of the alcohol lamp is further ensured; 3. The alcohol filling port is designed with a screw thread, with a large diameter, safe filling and easy operation.

The invention discloses a split type electric control silicone oil clutch water pump, wherein a clutch part is rigidly connected with and fixed to a shaft connecting bearing of a water pump part through a driven shaft, the clutch water pump aims to change an original stacking type assembly manner, the risk of clamping stagnation of a driving part and a driven part is reduced, separation coupling response time can be optimized, the speed of an impeller is corrected more accurately, engine oil consumption is better reduced, the requirement of an engine cooling system is met, and the service life of parts of the cooling system is prolonged.

The invention discloses agile project progress browsing board equipment which comprises a base, a shell is welded to the top of the base, vertical plates located on the base are arranged on the two sides of the shell, a mounting plate is slidably connected between the two vertical plates, and a connecting plate is welded to the back face of the top of the mounting plate. A mounting seat is connected to the connecting plate through screws, a universal support is mounted at the top of the mounting seat, a projector body is mounted at one end, away from the mounting seat, of the universal support, a plurality of clamping plates are slidably connected to the mounting plate, and a glass plate is arranged between every two clamping plates. Through the combination of various structures, the equipment is convenient to use and has a long-term tracking storage function of an electronic management system, a glass plate on equipment is clamped and fixed to replace traditional screw connection, the assembly mode is simple and convenient, the assembly efficiency is improved, the height of the glass plate can be adjusted, and the application range of equipment is widened.

The invention discloses a rubber protection device for hoisting a cold-rolled steel coil. The rubber protection device comprises steel plate protection layers, pull rods, steel cylinder protection sleeves, magnet positioning frames, springs, steel cylinders, vertical steel plates, suction claw protection layers, magnet suction claws and arc-shaped bearing plates, wherein the lower ends of the vertical steel plates are welded at one ends of the arc-shaped bearing plates; the steel plate protection layers wrap the vertical steel plates and the arc-shaped bearing plates; the steel plate protection layers on the outer sides of the arc-shaped bearing plates are in contact with the inner walls of holes of the hoisted steel coil; the steel plate protection layers on the inner sides of the vertical steel plates are in contact with the side wall of the hoisted steel coil; at least two steel cylinders are welded at the upper ends of the vertical steel plates; the springs are arranged in the steel cylinders; the lower ends of the springs are pressed against the vertical steel plates, and the upper ends of the springs are pressed against the pull rods; the pull rods extend out of the steel cylinders; the upper ends of the pull rods are bent towards the outer circumferential surface of the hoisted steel coil; the magnet positioning frames are welded at the upper ends of the pull rods; the magnet suction claws are arranged in the magnet positioning frames; and the outer sides of the steel plate protection layers, the steel cylinder protection sleeves and the suction claw protection layers are positioned on the same straight line.

The invention discloses a double-curved-surface aluminium plate suspended ceiling structure. The suspended ceiling structure comprises a hoop, a keel, panels and a three-dimensional adjusting mechanism, wherein the hoop is assembled with a roof truss of a building; the keel is assembled with the hoop, the keel comprises a plurality of main keels arranged in parallel with one another, and further comprises a plurality of secondary keels arranged in parallel with one another, the length direction of the main keels is perpendicular to the length direction of the secondary keels, and framed keels are further arranged on the lower parts of the main keels and the secondary keels; a plurality of panels are fixed to the lower parts of the framed keels; and the three-dimensional adjusting mechanism comprises vertical threaded rods connected with the main keels and the secondary keels, universal joints connected with the framed keels are arranged at the bottoms of the threaded rods, the universal joints are provided with threaded holes assembled with the threaded rods, and the universal joints are provided with the rotation freedom degree of the universal joints and the rotation freedom degree of the threaded rods around the axis of the threaded rods. According to the double-curved-surface aluminium plate suspended ceiling structure, the structural strength is high, on-site welding is eliminated, maintenance and disassembly are convenient, and when the effect of the curved surface top is needed to be created on the overall, the local panel can conveniently fine adjust the height and adaptively change the angle.

The invention discloses a micromotor commutator system, which comprises a main shaft and a commutator, wherein the commutator is provided with a large diameter section and a small diameter section; the large diameter section is stuck to the inner wall of the coil, and the outer wall of the small diameter section is evenly fixed with three conducting strips which are contacted with an electric brush. The invention is characterized in that the commutator is injection-molded on the main shaft; the side wall of the main shaft is provided with a holddown groove; a spacing convex hull is injection-molded on the inner wall of the commutator; the shape of the spacing convex hull conforms to that of the holddown groove; the spacing convex hull is positioned in the holddown groove; and the outer wall of the large diameter section is only provided with one locating port. Since the commutator is injection-molded on the main shaft, the invention simplifies the assembly process, reduces the difficulty for assembling the motor commutator, greatly increases the assembly speed, lowers the assembly cost and improves the assembly mode of the conducting strips.

The invention relates to a slide block type linear displacement sensor. The sensor comprises a housing and a slide block brush assembly. A side face housing which is arranged in the length direction of the housing and opposite to the housing is formed by a wave-shaped plate body. The cross section, which is perpendicular to the length direction of the housing, of outer side plate face of the wave-shaped plate body is wave-shaped. Slide grooves which are arranged in the wave-shaped plate body and through which the slide block brush assembly moves along the length direction of the housing are arranged in the housing. The wave-shaped plate body has good anti-deformation ability, so defects of too big linear errors and deformation in processing caused by the fact that the housing is too long can be avoided; assembly precision of the product is greatly improved; reliability of product in long stroke is ensured; smooth cooperation degree between the oppositely arranged guide grooves in the wave-shaped plate body in the housing and a slide sleeve in the slide block brush assembly is increased; and product quality and measurement precision can be further improved.

The invention relates to a mounting screw connection type cavity filter. The mounting screw connection type cavity filter includes a cavity and a sealing cover plate, wherein one end of the cavity isopened and the cavity is molded through die-cast; a plurality of spaced and interconnected resonance pieces are fixed on the sealing cover plate; the resonance pieces and the sealing cover plate are integrally die-cast structures; one of the outer side walls of the cavity is provided with a pair of pin mounting holes penetrating through the side wall of the cavity; a pin medium is inserted in theeach pin mounting hole, and a mounting screw is disposed in the each pin medium, and one end of the mounting screw is located outside the cavity to facilitate connection with an antenna; and one end,of the mounting screw, penetrating the resonance piece is screwed on the resonance piece. The mounting screw connection type cavity filter changes the disassembling mode of a traditional filter that the upper and lower disassembling structure is modified to be a left and right side drawing structure, and adopts an integrated design of the resonance pieces and the cover plate, thus simplifying thestructure of the boss and the like which need to be welded during the installation of the resonance pieces, and reducing the number of internal parts, optimizing the assembling mode, and improving theproduction efficiency. At the same time, the mounting screw connection type cavity filter cancels the traditional welding form and can be reused by using mounting screws.

The invention discloses a novel countable root canal file, belonging to dental medical devices. The novel countable root canal file comprises a handle, wherein the handle is provided with a counter; the upper end surface of the handle is provided with a hole, the inner side wall of the hole is provided with an annular groove, and the side wall of the annular groove is provided with a display hole;the counter comprises a character wheel sleeving the annular groove, and a pawl device arranged on a side wall of the hole, the outer side wall of the character wheel is provided with a digital sign,the upper end surface of the character wheel is fixedly connected with a ratchet wheel, the pawl device is connected with the ratchet wheel, an end surface of the character wheel is provided with a through hole, the axis of the through hole is collinear with the axis of the character wheel, a circular ring is sheathed in the through hole, the inner side wall of the circular ring is provided witha chute, a button sleeves the upper end of the hole, the button can move in the hole along the axis of the hole, the bottom of the button is connected with a connecting rod, the side wall of the connecting rod is provided with an inclined block, and the inclined block adapts to the chute. According to the novel countable root canal file, the number of uses of the root canal file can be visually read on the handle.

The invention discloses a fast single-shaft dial linking machine, comprising a machine body, a support on the side edge of the machine body, a main shaft passing through the machine body and the support, a main shaft driving device arranged on the outer side of the machine body and used to drive the main shaft to rotate, a dial arranged on the lower end of the machine body, a first driving device arranged in the machine body and being linked with the main shaft and used to drive the dial to rotate, a crochet hook assembly arranged on the outer side of the support and cooperated with the dial, a second driving device arranged in the support and used to drive the crochet hook assembly to swing front and back and left and right, a thread taking-up device arranged on the outer side of the support, and a third driving device arranged in the support and used to drive the thread taking-up device to operate. The end of the support is provided with a main shaft supporting structure used to support the main shaft, and the side of the main shaft supporting structure is also provided with a shaft inversion prevention device. The dial linking machine is stable in structure, stable and smooth in operation, and simple in dismounting, and has effect of preventing shaft inversion, and has relatively long service life and high market competitiveness.

The invention relates to a special negative pressure ventilation system for production improvement of a cement kiln, and belongs to the technical field of ventilation pipelines. In order to solve the problems that in a traditional negative pressure ventilation system, pipelines are inconvenient to assemble, and the pollution of gas emission is large, the following technical scheme is provided that the air duct comprises a first air duct pipe, a second air duct pipe and a filtering mechanism, a first clamping mechanism is arranged at one end of the first air duct pipe, and a second clamping mechanism is arranged at one end of the second air duct pipe; and a clamping mechanism plate is arranged in the air duct pipe II. Through combination of various structures, when the device is used for assembling a pipeline of a ventilation system, a clamping and fixing mode is used for replacing a traditional screw connection mode, so that the working efficiency of pipeline assembling is improved, and the filtering mechanism is arranged in the pipeline, so that the filtering effect is improved. Therefore, when the cement kiln is subjected to negative pressure ventilation through a pipeline, exhausted air can be filtered and exhausted, pollution to the atmosphere is reduced, the filtering mechanism is fixed in a clamping mode, and the assembling mode is simplified.

The invention discloses an electromagnetic iron plate of an electronic jacquard of a narrow-width loom. The electromagnetic iron plate comprises a PCB (Printed Circuit Board), an electromagnet and a copper bar, wherein the electromagnet and the copper bar are arranged on the PCB; the electromagnet comprises an electromagnet main body; one end of the electromagnet main body is fixedly connected with a connecting piece; a raised pin post is arranged on the outer end surface of the connecting piece; a limiting hole which is matched with the pin post in a clamping way is formed in the copper bar. The electromagnetic iron plate disclosed by the invention has a more convenient assembling way and a stable assembling effect; meanwhile, the using amount of standard parts-screws is reduced, so that the efficiency is greatly increased, and the cost is reduced.

The invention discloses an anti-explosion stainless steel alcohol lamp. A round opening is formed in the upper portion of a stainless steel lamp tank. A tubular lamp opening is convexly formed in the round opening. A lamp wick is arranged in the lamp opening, a cotton fiber is arranged in a through hole of the lamp wick, a tubular lamp nozzle is connected to the upper end of the lamp wick in a sleeving mode, and a zigzag edge is arranged at the upper edge of the lamp nozzle and formed by multiple tooth tops which are arranged circularly. The anti-explosion stainless steel alcohol lamp has the advantages that a stainless steel material replaces a glass material, physical processing is conducted on the stainless steel surface, the safety coefficient and the durability coefficient of the anti-explosion stainless steel alcohol lamp are effectively increased, explosion caused by the influence of temperature is not likely to happen, and fire disasters are avoided; the lamp wick and the lamp nozzle are assembled in an improved mode, the structure of the lamp nozzle is improved, and the stability of the alcohol lamp is further guaranteed; the alcohol feeding inlet is designed in a threaded mode, the diameter of the alcohol feeding inlet is large, filling is safe, and operation is convenient.

The invention discloses an installing structure of an automobile shifting cover. The installing structure comprises a shifting cover (1) and a shifting panel (2), wherein the shifting cover (1) penetrates through a through hole of the shifting panel (2); the lower end of the shifting cover (1) is continuously curled to form a circle of sandwich surrounding edge (1a); a steel wire ring (3) is wrapped in the sandwich surrounding edge (1a); and moreover, the sandwich surrounding edge (1a) and the steel wire ring (3) are clamped together with clamping feet (2a) at the bottom of the shifting panel (2). According to the invention, the installing structure of the shifting cover is simplified so that the assembly mode of the shifting cover is simpler, more convenient and quicker; the assembly efficiency is enhanced and the labor intensity of workers is reduced; meanwhile, the production cost can be effectively reduced.

The invention discloses an ultrasonic cleaning circulating water tank for a liquid crystal screen cleaning machine. The ultrasonic cleaning circulating water tank comprises a liquid crystal screen cleaning machine body and multiple circulating water tanks arranged on the inner side of the liquid crystal screen cleaning machine body. An ultrasonic generating device is installed at the bottom end of the inner side of each circulating water tank, supporting beams are fixed to the positions, opposite to the two sides of each circulating water tank, of the inner wall of the liquid crystal screen cleaning machine body, hanging blocks are fixed to the two sides of each circulating water tank, and hanging grooves corresponding to the hanging blocks are formed in the two sides of the supporting beams. Through the arrangement of the supporting beams, the hanging blocks and the hanging grooves and the arrangement of fixing mechanisms composed of threaded grooves, threaded blocks, rotating rods, fixed pressing plates, limiting protrusions, limiting grooves and rotating rods, the assembling manner of the circulating water tanks is simpler and more convenient, the installing efficiency and the follow-up disassembling efficiency of the circulating water tanks are improved, convenience is brought to maintenance personnel for disassembling and assembling the circulating water tanks later, and later maintenance convenience is improved.

The invention relates to the technical field of construction engineering, in particular to a pipe gallery channel and a construction method thereof. The channel of the pipe gallery includes a bottom plate, a side plate and a top plate, and its construction method includes the following steps: S1: preliminary preparation; S2: excavation of the foundation pit; S3: pretreatment of the bottom of the foundation pit; S4: laying of the bottom plate; S5: installation of the side plate; S6: roof installation; S7: waterproofing and earthwork backfilling. The invention has the following beneficial effects: during transportation, the bottom plate, side plate and top plate are transported to the construction site respectively, which is convenient for transportation, and they are directly assembled together at the construction site, the assembly method is more convenient, and time is saved.

The invention discloses a diaphragm type gas meter and a movement thereof. Circular platforms for installing diaphragm assemblies are formed on inner sides of ports of a movement body in the movement of the gas meter; circular raised bosses which are embedded into the ports and press the diaphragm assemblies with the circular platforms are formed on side cover plates; a movement wall among the circular raised bosses, the circular platforms and the ports form a first sealing surface; the side cover plates and the ports are fixed through clamping structures; the circular raised bosses formed on the side cover plates are embedded into the circular platforms positioned in the movement body, the clamping structures can firmly press the diaphragm assemblies between the movement body and the side cover plates. Seal assembly of the movement body, the diaphragm assemblies, and the side cover plate can be easily and rapidly achieved, and the formed sealed structure is firm and reliable; and the circular raised bosses and the movement wall form the first sealing surface while the circular raised bosses are embedded into the movement body, the seal area between the movement body and the side cover plates can be increased, and the seal performance of a metering chamber is greatly improved.