CN110553791A

CN110553791A - Dual-motor pressure generating system of weight loading mechanism

Info

Publication number: CN110553791A
Application number: CN201910383277.XA
Authority: CN
Inventors: 高腾; 庞桂兵; 卜繁岭
Original assignee: Dalian Polytechnic University
Current assignee: Dalian Polytechnic University
Priority date: 2019-05-09
Filing date: 2019-05-09
Publication date: 2019-12-10

Abstract

The invention discloses a double-motor pressure generating system of a weight loading mechanism, which comprises a piston cylinder (61) and a piston (60) for generating pressure, wherein the piston (60) is connected with a lead screw (57) and a lead screw sleeve (56); the screw sleeve is connected with a first servo motor (51); the control of a pumping execution mechanism of the pre-pressurizing pump, an opening and closing action mechanism of the pressure release valve and an opening and closing action mechanism of the booster valve is realized by additionally arranging a second servo motor and a first servo motor which are respectively connected with a transmission mechanism. Specifically, the pressure output end of the piston cylinder is connected with a gauge connecting seat (77) of a pressure gauge (78) and a pressure relief valve (74) in parallel; the pressure cavity at the rear part of the pressure output end of the piston cylinder is connected with the output end of an increasing valve (73), and the oil supply end of the increasing valve is connected with the oil outlet of a pre-pressurizing pump (70); an oil inlet of the pre-pressing pump is connected with an oil cup (75). The invention adopts two servo motors to control the pre-pressing pump and the pressure regulator to realize pressure making, the pre-pressing pump is used for quickly pressing in the initial stage of pressing, and the pressure regulator is used for accurately pressing after the pressure reaches a certain degree, thereby realizing full-automatic, quick and accurate pressure making.

Description

Dual-motor pressure generating system of weight loading mechanism

Technical Field

The invention relates to an automatic weight adding device, in particular to the structural improvement of a piston pressure gauge.

background

Pressure is one of important process parameters in industrial production, and in the field of pressure detection, system pressure is often required to be detected, and various pressure gauges, pressure sensors and pressure transmitters are common pressure detection instruments and are applied to almost all fluid related fields such as chemical engineering, petroleum, aerospace, automobiles, power generation, medium transmission, water supply and gas supply and the like. The performance of the pressure gauge is directly related to the quality of a detection result, and the pressure gauge must be subjected to regular pressure calibration in order to ensure the detection precision of the instrument. If the pressure detection is inaccurate, the production efficiency is influenced, the product quality is reduced, and even serious safety accidents are caused, so that the pressure measurement has a special position in industrial production. Therefore, the pressure gauge needs to be measured and checked regularly when being delivered from a factory or in the using process, so that the pressure gauge is required to be convenient and quick to detect and calibrate, high in efficiency and accurate in detection result. The measurement calibration device of the pressure gauge commonly used at present is a piston pressure gauge. The piston pressure gauge generally includes a pressure generating portion and a pressure calibrating portion. Pressure calibration generally adopts a series of weights with standard weight to produce corresponding pressure, therefore requires that the code adding device and the code adding process have better stability and practical convenience.

The piston type pressure gauge is a common instrument for detecting and calibrating the pressure gauge, the weight is generally a reference when the piston type pressure gauge is detected and calibrated, a specific weight is formed by combining specific weights, the specific weight is converted into liquid pressure through a hydraulic system and applied to the pressure gauge, and the method is a common method for detecting the pressure gauge. That is to say, piston pressure gauge's weight loading mode is mainly manual loading at present, and the weight is placed and is relied on artifical transport, and consumption of time and labor, reliability and poor stability, automatic code adding process and device are very necessary.

Disclosure of Invention

Aiming at the problems, the invention provides a system for automatically realizing pressure making, which has the characteristics of simple operation, convenient use and high efficiency, can be used together with a weight loading system, realizes a full-automatic piston type pressure metering robot, and solves the problems of the existing piston pressure gauge.

In order to achieve the aim, the invention provides an independent pressure making system of a weight loading mechanism, which comprises a piston cylinder and a piston for making pressure, wherein the piston is connected with a lead screw which is connected with an axially fixed screw sleeve; the screw sleeve is connected with a first servo motor for driving the screw sleeve to rotate through a clutch; the pressure output end of the piston cylinder is connected with a gauge connecting seat of a pressure gauge and a pressure relief valve in parallel; the pressure cavity at the rear part of the pressure output end of the piston cylinder is connected with the output end of an increasing valve, and the oil supply end of the increasing valve is connected with the oil outlet of a precompression pump; an oil inlet of the precompression pump is connected with an oil cup; and the pumping execution mechanism of the precompression pump, the opening and closing action mechanism of the pressure release valve and the opening and closing action mechanism of the booster valve are respectively connected with a power output part through a clutch.

The power output part comprises the first servo motor and a transmission mechanism for outputting the rotation action of the first servo motor; the transmission mechanism is a chain and chain wheel transmission mechanism, and is connected with a pumping execution mechanism of the precompression pump; the power output part also comprises a power unit which is connected with the pressure release valve opening and closing action mechanism and the valve increasing opening and closing action mechanism and consists of a second servo motor and a transmission part.

In a preferred mode, the output end of the pressure generating system is associated with and drives the lower piston rod to stretch; the lower piston rod for weighing or pressure calibration is connected with a piston weight; the upper part of the piston weight is hung at the center of the upper barrel opening of the barrel-shaped hanging basket weight; the outer side of the bottom of the cylinder wall of the hanging basket weight is connected with a radial annular weight tray, and the weight tray bears annular disc-shaped weights arranged in a stacked mode; the upper part of the piston weight is also connected with a tray weight positioned above the hanging basket weight through a connecting structure; a group of sleeved cylindrical weights is arranged on the tray weight; the disc-shaped weights are provided with disc-shaped weight loading and unloading units; the tubular weight is provided with a tubular weight loading and unloading unit.

In a preferred mode, the precompression pump is of a cylinder structure, and a pumping execution mechanism of the precompression pump is a precompression pump piston rod. The one-way oil circuit in the system is realized by arranging a one-way valve. And a displacement sensor used for determining the position of the movable tail end of the piston is arranged in the piston cylinder, and the displacement sensor is connected with a control end used for limiting the piston. And the pressure output end of the piston cylinder is also provided with a pressure sensor, and the pressure sensor is connected with a controller for controlling the rotating speed of the first servo motor.

in a preferred mode, the tubular weight and the tubular weight loading and unloading unit have the following structures: the upper end of each layer of the tubular weight is provided with a driving mechanism for driving the tubular weight to move up and down; a tray weight for weighing or pressure detection is arranged below the cylindrical weight; the height of the tubular weight is gradually reduced from inside to outside; a supporting bulge is arranged on the outer cylindrical surface of the upper end of each cylindrical weight; the driving mechanism comprises a group of horizontally telescopic support rods arranged on the circumference of each cylindrical weight support bulge at intervals, and the rear part of each support rod is connected with a support rod driving cylinder; and each code supporting rod driving cylinder is fixed on a code supporting tower vertically driven by a weight pulling cylinder.

In a preferred mode, the code supporting tower is arranged in a tower-shaped structure corresponding to the top of the cylindrical weight; each group of the brace rods is at least 3.

In a preferred embodiment, the disc-shaped weight and the disc-shaped weight loading mechanism are: the edge of the disc-shaped weight is provided with a flange; the disc-shaped weight loading mechanism comprises at least three code pulling rods which are vertically arranged on the periphery of the disc-shaped weight and have the same structure; the plurality of code pulling rods are respectively and synchronously connected with vertical driving units which move up and down in a mode of rotating around the axes of the code pulling rods; the stacking bar corresponds to each layer in the axial direction, the flange of the disc-shaped weight is provided with a radially outward lap joint convex disc, each layer of the lap joint convex disc is connected with the flange lap joint surface of the disc-shaped weight so that the stacking bar is gradually enlarged from bottom to top, the disc-shaped weight and each layer of the lap joint convex discs are overlapped completely, the stacking bar rotates one circle of each layer from top to bottom, and the lap joint convex disc is separated from the lap joint of the disc-shaped weight one by one.

Compared with the prior art, the invention has the beneficial effects that:

1. The weight free combination under the condition of heavy weight is realized by adopting the combined loading of the cylindrical weight and the disc-shaped weight. The big weight of tube-shape weight overlaps outside the little weight, and the ring overlaps mutually, can only have the free combination of a limited weight, and the weight of going to the intermediate position weight more is littleer. The disc-shaped weights are laminated one on the other layer by layer, and a plurality of large weights with the same weight can be loaded layer by layer. The weight and the weight can be freely combined under the condition of heavy weight by combining the two components.

2. and the positions of all weights can be accurately positioned in the loading and unloading process. Conical surfaces are arranged between the cylindrical weight and the tray weight, between each layer of the disc-shaped weight and the adjacent layer of the disc-shaped weight, between the tray weight and the piston weight, between the hanging basket weight and the piston weight and between the disc-shaped weight and the hanging basket weight, so that the positioning accuracy and reliability between all the weights are ensured.

3. The pressurizing device adopts a servo motor to provide power, the servo motor is connected with a speed reducer to amplify the power, the servo motor drives a chain wheel to control a suction control switch valve of a clutch, and one power source is used for controlling a plurality of valves, a pressure regulator and a pre-pressurizing pump. The invention adopts a servo system to control the pre-pressing pump and the pressure regulator to realize pressure making, the pre-pressing pump is used for quickly pressing at the initial stage of pressing, and the pressure regulator is used for accurately pressing after the pressure reaches a certain degree, thereby realizing full-automatic, quick and accurate pressure making of the pressure.

Drawings

Fig. 1 is a schematic diagram of the arrangement structure of the combined weight loading mechanism of the invention.

fig. 2 is an enlarged schematic view of a portion a in fig. 1.

Fig. 3 is an enlarged schematic view of B in fig. 1.

Fig. 4 is a schematic diagram illustrating the dimensions of the cylindrical weight in the combined weight loading mechanism of the present invention.

Fig. 5 is a schematic view of the overall structure of the combined weight loading mechanism of the present invention.

Fig. 6 is a schematic view of the weight loading principle of the combined weight loading mechanism of the present invention.

fig. 7 is a schematic structural view of the loading guide principle of the combined weight loading mechanism of the invention.

Fig. 8 shows a schematic diagram of a two-servomotor controlled pressure build system.

Fig. 9 is a schematic structural diagram of the arrangement principle of the peripheral guide drive in the combined weight loading mechanism of the present invention.

Fig. 10 is a supplementary structural view of the guiding driving arrangement principle of fig. 9.

Fig. 11 is a schematic view showing the arrangement of the bottom lower plate in the combination weight loading mechanism of the present invention.

Detailed Description

The combined weight loading mechanism shown in fig. 1-7 and 9-11 comprises a piston weight 31 connected with a lower piston rod 92 for weighing or pressure calibration; the upper part of the piston weight 31 is hung at the center of the upper cylinder opening of the cylindrical hanging basket weight 33; the radial annular weight tray 23 is connected to the outer side of the bottom of the barrel wall of the hanging basket weight 33, and the annular disc-shaped weights 22 arranged in a stacked mode are borne on the weight tray 23. The upper part of the piston weight 31 is also connected with a tray weight 34 positioned above the hanging basket weight 33 through a connecting structure; the tray weight 34 is provided with a set of nested tubular weights 20. The disc-shaped weight 22 is provided with a separate disc-shaped weight loading and unloading unit. The tubular weight 20 is provided with an independent tubular weight loading and unloading unit. Wherein the piston cylinder of the lower piston rod 92 is connected to the output 44 (fig. 8) of the pressure generating system, as described below.

The tubular weight loading mechanism (tubular weight loading and unloading unit) refers to chinese patent 201410229031.4, which discloses a driving mechanism for driving weights to move up and down in a freely combined automatic code adding device. The patent is also an automatic code adding device used in the field of pressure detection, and comprises a group of sleeved cylindrical weights, wherein the upper end of each layer of the weights is provided with a driving mechanism for driving the weights to move up and down; and a weight tray of a weighing or pressure detection mechanism is attached to the lower part of the weight. The height of the weight is gradually reduced from inside to outside; and a supporting groove is formed on the exposed cylindrical surface at the upper end of each weight, and a supporting rod, an inner ring, a middle ring and an outer ring are correspondingly arranged.

In an optimal mode, the arrangement mode of the tubular weight and the loading mechanism thereof is as follows:

The tubular weight comprises a group of tubular weights 20 which are sleeved, and the upper end of each layer of the tubular weight 20 is provided with a driving mechanism for driving the tubular weight 20 to move up and down; a tray weight 34 for weighing or pressure detection is arranged below the cylindrical weight 20; the height of the tubular weight 20 is gradually reduced from inside to outside; and a supporting bulge 91 is arranged on the outer cylindrical surface of the upper end of each cylindrical weight 20.

The tubular weight's actuating mechanism includes corresponding each tubular weight 20 supports a set of level flexible vaulting pole 27 that sets up at the interval on the protruding 91 circumference, and each group vaulting pole 27 is 3 at least. The rear part of each support rod 27 is connected with a support rod driving cylinder 24; each spreader bar drive cylinder 24 is secured to a spreader tower 25 which is vertically driven by a pull weight cylinder 98. The support tower 25 is arranged in a tower-shaped structure corresponding to the top of the tubular weight 20.

The disc-shaped weight loading and unloading unit can be realized by a supporting unit of a sequential code adding device in Chinese patent CN201410227718.4 or similar integral reference. The loading and unloading part of an automatic sequential code adding mechanism in Chinese patent CN201710373500.3 can also be selected.

Chinese patent CN201410227718.4 discloses a sequential code adding device, which comprises a supporting plate with a lifting mechanism arranged at the bottom, wherein disc-shaped weights are arranged on the supporting plate in a stacking manner through supporting units; a flange is formed at the edge of each layer of weights and is inversely suspended and lapped on the supporting part of the supporting unit; the arrangement relation between two adjacent layers can meet the requirement that interference cannot occur during loading. In addition, a weight tray of a weighing or pressure detection mechanism is attached between the bottom-most layer weight and the supporting plate. Chinese patent CN201710373500.3 discloses an automatic sequential stacking mechanism, which comprises a plurality of disc-shaped weights, a weighing part and a loading and unloading part. The weighing part comprises a weighing tray; the loading and unloading part comprises a support column assembly; each support column component comprises a support column of which the lower rod section is a polished rod section, a sleeve sequentially sleeved on the polished rod section, and an elastic body supported between the support column and the sleeve; the upper rod section of the support column and the outer part of the sleeve are axially provided with convex support steps at intervals, and the lower end of the light rod section of the support column is fixed on a lifting platform which is horizontally arranged and driven by a driving mechanism to lift; each sleeve is provided with an external support for limiting its descent to the lowest position.

In an optimal mode, the disc-shaped weight and the loading and unloading unit thereof are arranged in the following modes:

the disc-shaped weights comprise a plurality of stacked disc-shaped weights 22 with flanges at the edges, a weighing part and a loading and unloading part; the weighing section includes a weight tray 23 for holding the disc-shaped weight for weighing.

The loading and unloading part (disc-shaped weight loading and unloading unit) comprises at least three code pulling rods 16 with the same structure, which are distributed on the periphery of the disc-shaped weight 22 in a concentric direction; the plurality of the tension rods 16 are respectively and synchronously connected with vertical driving units which move up and down in a mode of rotating around the axes of the tension rods. Each code bar 16 is connected by a fixed toothed pulley 15 to a toothed belt 14 which encircles the entire code bar 16 and the outside of the disc-shaped weight 22. The inner side of the toothed belt wheel 15 which surrounds it is supported outwards by means of a toothed belt idler 36 on the outside of the disc-shaped weight 22.

The tension rod 16 is provided with a radially outward overlapping convex disk 95 corresponding to the flange of each layer of the disc-shaped weights 22 in the axial direction. The overlapping surface (as shown in fig. 6) between the overlapping flange 95 of each layer and the flange of the disc-shaped weight 22 gradually increases from the bottom to the top with the stacking rod 16, so that the overlapping flange 95 of each layer and the disc-shaped weight 22 are separated from each other one by one from the top to the bottom after the disc-shaped weight 22 and the overlapping flange 95 of each layer are completely overlapped with each other by rotating the stacking rod 16 for a circle. According to the above description, one end of each of the plurality of tie bars 16 is further provided with a tie bar angle control device 10 for driving the tie bars to rotate around the axis. The vertical driving unit of the invention comprises an intermediate plate 7 which is driven by a driving component to move up and down; each tension rod 16 is arranged through the middle plate 7 through a bearing 13 and is fixed with the middle plate 7 in a vertical direction through a positioning part.

Further, "faying surface" is specifically described. The disc-shaped weight 22 is a disc-shaped body, and the overlapping surface is a sector surface from the contact to the separation of the disc-shaped weight 22 and each layer of the overlapping convex disc 95, and the size of the sector surface can be determined by the angle of the sector surface of the disc. Preferably, the overlapping cam 95 is shown as an incomplete disk about the axis of the stacking bar 16; in order to ensure the loading of the disc-shaped weights on the uppermost layer, the lapping convex disc 95 on the uppermost layer is completely lacked relative to the disc surface in the direction of one side part of the code pulling rod 16, so that the lapping convex disc and the disc-shaped weights on the uppermost layer can be completely separated.

Preferably, as shown in fig. 1, the contact surface of the piston weight 31 and the upper cylinder mouth of the basket weight 33 is aligned in a conical surface; the weight tray 23 of the hanging basket weight 33 is aligned with the disc-shaped weights 22 and the conical surfaces at the inner openings between two adjacent disc-shaped weights 22. Each cylindrical weight 20 and the tray weight 34 are matched with each other in an annular conical surface; optimally, the disc surface of the tray weight 34 is provided with grooves with annular conical surfaces at two sides, and the two annular conical surfaces are respectively aligned with the lower end surfaces of the two adjacent tubular weights 20.

The frame and lifting structure of the present invention are shown in fig. 9-11. The piston weight 31, the disc weight 22, and the cylindrical weight 20 are provided with vertically upward-pushing cylinders 99 in a peripheral symmetry, and are provided with a plurality of vertically oriented optical axes 4.

As shown in fig. 11, the optical axis 4 and the upper ceiling cylinder 99 are placed on the lower plate 9. As shown in fig. 9-11, the middle part of the optical axis 4 is penetrated with a middle plate 7 connected by a linear bearing 5, and the top part of the optical axis is connected with an upper plate 8; the middle plate 7 and the upper plate 8 are fixed into a whole by a middle connecting unit and are integrally fixed on the top of a piston mandril 89 of the upper jacking cylinder 99. The upper plate 8 is used as a driving component of the tubular weight 20 for driving the weight to move up and down and is connected with a code supporting tower 25; the intermediate plate 7 serves as the active part of the vertical drive unit for the disc-shaped weights 22, to which the tension rod 16 is connected.

The disc-shaped weight loading and unloading unit comprises an intermediate plate 7 which is driven by a driving component to move up and down; each code bar 16 penetrates through the middle plate 7 through a bearing 13 and is vertically fixed relative to the middle plate 7 through a positioning component.

The tubular weight loading and unloading unit includes an upper plate 8 that fixes the weight pulling cylinder 98 and the support tower 25. The middle plate 7 and the upper plate 8 are connected by a pull weight cylinder 98 and a support tower 25.

the code supporting tower 25 is connected with the middle plate 7 through a connecting screw 88, the code supporting tower 25 is connected with a weight pulling cylinder 98 through a connecting screw 87, and the upper plate 8 is connected with the weight pulling cylinder 98 through a connecting screw 96. In normal work, the weight pulling cylinder 98 can pull the code supporting tower 25 to drive the middle plate 7 to move up and down. When the middle plate 7 needs to be jacked up, the connecting screw 93 is unscrewed, so that the upper plate 8 is separated from the guide optical axis 4, and the piston mandril 89 of the upper jacking cylinder 99 jacks the upper plate 8 to drive the code pulling rod angle control device 10, namely the code supporting tower 25 part and the middle plate 7 to move upwards along the guide optical axis 4.

In addition, the structure of the pressure generating system can be selected in the following ways:

As shown in fig. 9, two servo motor controlled pressure build systems: the first servo motor 51 is connected with a first speed reducer 552 to reduce the rotation speed of the first servo motor 51 and increase the torque, the first speed reducer 552 is connected with a transmission shaft, a first chain wheel 53 and a first clutch 54 are mounted on the transmission shaft to realize the transmission of the rotation speed and the torque, and the first clutch 54 is connected with a second speed reducer 55 to realize the reduction of the rotation speed of the first servo motor 51 and the increase of the torque. The second speed reducer 55 is connected with a screw sleeve 56, the screw sleeve 56 is matched with a screw rod 57, and the screw rod 57 is connected with a piston 60. The first servo motor 51 rotates to drive the piston 60 to move linearly in the piston cylinder 61, so that hydraulic oil in the piston cylinder 61 is compressed, and the pressure is increased. The piston 60 is provided with a screw 58, the screw 58 is provided with a light shielding sheet, the piston cylinder 61 is provided with a position sensor 59, and the sensor 59 limits the moving displacement of the piston. The second chain wheel 63 and the second clutch 66 are mounted on the pre-pressure pump driving shaft, the second clutch 66 is connected with a pre-pressure pump piston rod 72, and the pre-pressure pump piston rod 72 is controlled to linearly move in the pre-pressure pump cylinder body 70 to work so as to provide pre-pressure for the piston cylinder 61. The first sprocket 53 and the second sprocket 63 are connected together by a chain 62. The third servomotor 40 is connected to a third sprocket 64, and the third sprocket 64 and the third clutch 67 are mounted on a drive shaft of the pressure increasing valve 73. The third clutch 67 is connected with the pressure increasing valve 73, and the third clutch 67 controls the opening and closing of the pressure increasing valve 73; the fourth sprocket 65 and the fourth clutch 68 are attached to a drive shaft of the relief valve 74, the fourth clutch 68 is connected to the relief valve 74, and the fourth clutch 68 controls opening and closing of the relief valve 74. The third sprocket 64 and the fourth sprocket 65 are connected together by the chain 62. The pressure increasing valve 73 is connected with the prepressing pump cylinder body 70 and the piston cylinder body 61, the pressure increasing valve 73 is opened to apply prepressing force generated by the prepressing pump cylinder body 70 to the piston cylinder body 61, the pressure reducing valve 74 is connected with the oil cup 75 and the meter connecting seat 77, the pressure reducing valve 74 is opened to zero the pressure of the system, the meter connecting seat 77 is connected with the piston cylinder body 61, and the pressure gauge 78 is installed on the meter connecting seat 77. The pressure sensor 76 is connected to the controller, and generates a feedback signal to control the rotation of the motor, i.e. to adjust the pressurization speed.

And (3) pressurizing and calibrating: the fourth clutch 68 is electrified to attract, the third clutch 67 is powered off, the third servo motor 40 rotates to close the pressure relief valve 74, the fourth clutch 68 is powered off, and the third clutch 67 is electrified to attract, the third servo motor 40 rotates to open the pressure relief valve 73; when the second clutch 66 is energized to close and the first clutch 54 is de-energized, the rotation of the first servo motor 51 is transmitted to the pre-pressure pump piston rod 772 through the second chain wheel 63, so that the pre-pressure pump piston rod 772 moves linearly in the pre-pressure pump piston rod 70 in the pre-pressure pump cylinder body. The hydraulic oil in the oil cup 75 is sucked into the pre-pressurizing pump piston cylinder 70 through the first check valve 69, the hydraulic oil is sent to the piston cylinder 61 through the second check valve 71 to enable the pressure in the piston cylinder 61 to reach a certain value, the fourth clutch 68 is powered off, the third clutch 67 is powered on, and the third servo motor 40 rotates to close the pressure increasing valve 73. The second clutch 66 is powered off, the first clutch 54 is powered on and closed, the first servo motor 51 rotates to drive the piston rod 60 to move linearly in the piston cylinder 61, hydraulic oil is compressed, pressure is increased, the pressure is transmitted to the meter connecting seat 77, the pressure gauge 78 arranged on the meter connecting seat 77 reacts to the pressure, the pressure sensor 76 transmits a pressure signal to the controller to control the rotating speed of the first servo motor 51, slow pressurization is achieved, and verification points of the pressure gauge 78 are verified sequentially.

And (3) a step-down verification process: the first clutch 54 is electrified for closing, the second clutch 66 is deenergized, and the first servo motor 51 reversely rotates to control the piston rod 60 to move reversely in the piston cylinder 61 so as to realize the pressure reduction. When the detection point is detected, the pressure reduction pressure value is lower than the pressure value corresponding to the detection point, the first servo motor 51 reversely rotates to control the piston rod 60 to reversely move in the piston cylinder 61, the pressurization process is started, the pressure value is about to reach the pressure corresponding to the pressure gauge detection point, the pressure sensor 76 transmits a pressure signal to the controller to control the rotating speed of the first servo motor 51 to reduce, slow pressurization is realized, and the process is repeated to realize detection of the detection point in the depressurization process. After the verification is finished, the third clutch 67 is powered off, the fourth clutch 68 is powered on, the third servo motor 40 controls the pressure relief valve 74 to be opened, and the pressure in the system returns to zero.

The pressure system can connect a plurality of meter seats 77 to be established ties together, realizes detecting simultaneously of a plurality of manometer 78, and the pressure system of making also can connect a plurality of meter seats 77 to be established ties together and detect polylith manometer 78 simultaneously.

when the weight is arranged, the piston weight is positioned at the approximate center position, the tray weight and the hanging basket weight are arranged on the piston weight, the cylindrical weight is arranged on the tray weight, and the disc-shaped weight is arranged on the hanging basket weight. The overall arrangement is that the cylindrical weight is arranged above and the disc-shaped weight is arranged below. The cylindrical weights are not affected each other during loading, so that the weight of the weights can be freely combined and loaded, and the weights above the disc-shaped weights need to be pressed on the weights below the disc-shaped weights during loading, so that the weight of the weights can be sequentially combined and loaded. The weight free combined loading under the heavy weight condition is realized through the combined loading of the cylindrical weight and the disc-shaped weight.

The upper portion of the tubular weight is provided with a flange, the lower portion of the flange is provided with a telescopic support rod, one end, close to the flange, of the support rod can extend into the lower portion of the flange of the tubular weight, the tubular weight is lifted up and down, and loading and unloading of the tubular weight are achieved. The outer side of the upper part of the disc-shaped weight is provided with a flange, the lower part of the flange is provided with a code pulling rod with a changeable position, and the code pulling rod can extend into the lower part of the flange of the disc-shaped weight on different layers to control the sequential loading and unloading of the weights on different layers.

The tubular weight lower part is equipped with the conical surface (interior conical surface or the external conical surface), and the corresponding position also is equipped with the conical surface (the tubular weight is interior conical surface, and then the corresponding position on the tray weight sets up the external conical surface, and the tubular weight is the external conical surface, and then the corresponding position on the tray weight sets up interior conical surface) with the corresponding complex of tubular weight to realize the accurate positioning of tubular weight, guarantee simultaneously that the weight does not take place the offset at the rotation in-process. The inner sides of the upper part and the lower part of the disc-shaped weights are provided with inner conical surfaces or outer conical surfaces, if the lower side of a certain weight adjacent to the upper layer of weights is an inner conical surface, the upper side of the layer of weights is an outer conical surface, and vice versa; if the upper side of a certain weight adjacent to the lower layer of weight is an inner conical surface, the lower side of the weight of the layer is an outer conical surface, and vice versa. The accuracy of the position of the tray-shaped weight in the loading and unloading process and the position deviation in the rotating process are ensured through the conical surface. Piston weight upper portion sets up the step cylinder, and tray weight lower part sets up matched with step cylinder with it, if what set up on the piston weight is outer cylinder, then be interior cylinder on the tray weight, if what set up on the piston weight is interior cylinder, then be outer cylinder on the tray weight, through the cooperation between the cylinder realization the two accurate positioning. The outer edge of the piston weight is provided with an outer conical surface, the inner side of the hanging scaffold weight is provided with an inner conical surface matched with the piston weight, and the piston weight and the hanging scaffold weight are accurately positioned through the conical surfaces. The upper surface of the disc at the lower part of the hanging scaffold weight is provided with an inner conical surface or an outer conical surface corresponding to the conical surface of the disc weight adjacent to the upper surface so as to realize accurate positioning between the disc weight and the hanging scaffold weight.

The tray weight, the hanging basket weight and the piston weight are only one, and the cylindrical weight and the disc weight are multiple. The weight and size of each weight were determined as follows.

Weight: the tubular weights are placed in the middle with the lightest weight and are sequentially arranged outwards according to the weight, and the tubular weights are placed on the outermost sides with the heaviest weight. The weight of the disc-shaped weights is equal. The weight of the hanging basket weight is equal to that of the disc-shaped weight. The sum of the weight of the piston weight and the weight of the tray weight is the minimum value identified by the instrument.

Size: the height of tube-shape weight is highly reduced from the centre to the outside in proper order, and the diameter increases in proper order, satisfies following relation:

diameter: di < Di + 1;

Height: hi > Hi + 1.

D is the outer diameter of the cylindrical weight, D is the inner diameter of the cylindrical weight, i is the serial number of the cylindrical weight arranged from inside to outside, i is a natural number and i is more than or equal to 1.

The larger tubular weight and the disc-shaped weight adopt split combined weights, the tubular weight is in a split structure with ring-ring buckling type, and the outer edge of the inner ring split weight is provided with a step for fixing the outer ring split weight; the disc-shaped weights are of a split structure in a stacked mode layer by layer, and inclined planes are arranged on the upper side of the inner side of the lower-layer weight and the lower side of the outer side of the upper-layer weight to guarantee positioning. The split weight has the advantage of reducing the requirements of instruments and equipment when the weight is calibrated. The positioning of the weight in the device of the invention can be replaced by conical surfaces with different shapes and angles or other modes.

the upper plate 8, the optical axis 4, the middle plate 7, the lower plate 9, the support tower 25, the fixed sleeve or the linear bearing 3, the linear bearing 5 and the supporting leg 1 form a frame of the device; the cylindrical weight 20, the tray weight 34, the disc weight 22, the hanging basket weight 33 and the piston weight 31 form a weight load system of the device; the code pulling rod angle control device 10, the linear bearing 13, the toothed belt 14, the toothed belt wheel 15, the toothed belt idler wheel 36, the code pulling rod 16, the code supporting rod driving cylinder 24 and the code supporting rod 27 form a control mechanism for loading and unloading weights of the device; the belt 17, the belt pulley 18, the motor 19 and the air blowing column 28 form a weight rotation driving system of the device; the light barrier 11, the photoelectric sensor 12, the sensor support frame 30, the distance sensor 29 and the speed sensor 37 form an action position detection mechanism of the device; the upper jacking cylinder 99 and the connecting column 26 form a convenient operating mechanism for weight maintenance of the device.

The upper plate 8, the optical axis 4, the fixed sleeve or the linear bearing 3 and the lower plate 9 are fixedly connected, the middle plate 7 and the support tower 25 are fixedly connected, and the middle plate 7 can slide up and down along the optical axis 4 through the linear bearing 5; the upper plate 8 and the support tower are connected through the weight cylinder 98, the movement of the weight cylinder 98 can realize that the support tower 25 drives the support rod 27, the tubular weight up-and-down movement is realized to add the unloading action to the tubular weight, and simultaneously, the support tower 25 can be driven to drive the middle plate 7 to drive the code pulling rod 16 to move up and down, so that the disc-shaped weight up-and-down movement is realized, and the loading and unloading action to the disc-shaped weight is carried out.

And a code supporting rod arranged on a code supporting tower 25 drives the air cylinder 24 to drive the code supporting rod 27 to move in a telescopic mode along the horizontal direction, so that the relative position of the code supporting rod and a flange of the cylindrical weight is controlled, and the action control of different cylindrical weights is realized. According to the height of the cylindrical weight, a plurality of layers of code supporting rods 27 are arranged, and on the same layer, a plurality of code supporting rods 27 are arranged, and generally not less than 3.

the lower part of the code pulling rod 16 is provided with a plurality of layers of incomplete disks, namely, disk steps with gaps, when the code pulling rod 16 rotates around the axis of the code pulling rod 16, the incomplete disk gaps and the flanges of the disk-shaped weights in different layers are located at different relative positions, the code pulling rod is driven by the code pulling rod angle control device 10 to rotate, the protruding parts of the incomplete disks on the code pulling rod are located at different positions and extend into the lower parts of the flanges of the disk-shaped weights 22 in different layers, and action control of different disk-shaped weights is achieved. A plurality of disc-shaped weights are stacked on the hanging basket weight 33, and a plurality of cylindrical weights are annularly sleeved on the tray weight 34 to realize loading. A plurality of code pulling rods 16 are arranged on the middle plate 7 through linear bearings 13, generally not less than 3 code pulling rods are arranged, one code pulling rod 16 is connected with the code pulling rod angle control device 10 and can be driven by the code pulling rod angle control device, each code pulling rod 16 is provided with a toothed belt wheel, a plurality of code pulling rods are connected and linked through the toothed belts, and incomplete discs on different code pulling rods are guaranteed to be located at positions symmetrical along the center of the weight. The toothed belt is tensioned by the provision of a toothed belt idler 36.

The code bar angle control device 16 may be controlled by a stepper motor, a servo motor, or a rotary cylinder, among others.

The light blocking sheet 11 is arranged on one of the code pulling rods, the code pulling rods drive the light blocking sheet to rotate when rotating, the plurality of photoelectric sensors 12 are arranged around the light blocking sheet, and when the code pulling rods rotate to different positions, the photoelectric sensors 12 can sense the positions of the code pulling rods, so that the angle of the code pulling rods can be known, and the disc-shaped weight can be known to be loaded and unloaded.

Two sensor holders 30 are provided, one for fixing the distance sensor 29 and the other for fixing the speed sensor 37. The height position of the code tray is measured by the distance sensor 29, and the weight rotation speed is measured by the speed sensor 37. The sensor support 30 is mounted on a slideway fixedly connected with the bottom plate (the slideway can be independently arranged, and can also be a groove on the outer vertical surface of the cylinder). The distance sensor 29 may be implemented as a hall sensor, and the speed sensor may be implemented as a photoelectric sensor, and a coating layer (or an adhesive layer) having different colors may be provided on the lower surface of the pallet.

The working process of the device mainly comprises the following steps: the weight loading process, the unloading process of all weights, the floating and rotating process of the code supporting disc and the process of putting the weights into and taking the weights out of the device.

the weight loading process comprises the following steps: the piston weight 31 and the tray weight 34 are always in a loaded state. The loading of the tubular weight 20, all the tubular weight 20 are put on the tray weight 34 initially, the code bar drives the cylinder 24 to move, so that the connected code bar 27 is driven to extend to the lower part of the weight flange corresponding to the non-loaded tubular weight, the weight cylinder 98 is pulled to move, the weight to be unloaded is lifted to realize the unloading of the tubular weight, and the non-unloaded weight is the loaded weight. The loading of disc weight 22 and hanging flower basket weight 33, all disc weights 22 are put on hanging flower basket weight 33 at the beginning, control the turned angle of code bar 16, will draw incomplete disc bulge below the code bar to change to not loading disc weight or hanging flower basket weight 33's flange below, draw the action of weight cylinder 23, the weight that will unload is lifted up and is realized the uninstallation of weight, and the weight that does not unload is loaded weight.

Unloading process of all weights: stretch out all vaulting pole 27 to corresponding weight flange lower part, simultaneously, control is drawn the incomplete disc bulge in sign indicating number pole below and is changeed to all weight flange below, draws the action of weight cylinder 23, drives all weights and upwards lifts up, uninstalls all weights.

The process of putting weights into and taking weights out of the device: when the weight needs to be detached from the device for weight detection and other operations, the rotating angles of the code supporting rod driving cylinder 24 and the code pulling rod 16 are controlled, so that all the weights are in a loading state, namely the tubular weight 20 is in contact with the tray weight 34, and the disc-shaped weight 22 is in contact with the hanging basket weight 33. The upper plate 8 and the optical axis 4 are disconnected, the upper jacking cylinder 99 moves, the upper plate 8 is jacked to drive the code supporting tower 25 and the middle plate 7, and then the code pulling rod 16 is driven to integrally move upwards, so that all weights are exposed, and the weights can be conveniently placed in and taken out.

The principle of the invention is shown in the figures. The device of the invention adopts a preferred mode of pneumatic driving of a middle pull weight cylinder 98, a brace rod driving cylinder 24 and an upper jacking cylinder 99, but can be realized by a screw nut mechanism, a hydraulic oil cylinder mechanism, an electromagnetic driving mechanism or other mechanisms capable of realizing linear motion. The power device can be correspondingly an air pump, an electric motor, a hydraulic motor and the like. The distance sensor 29 and the speed sensor 37 are disposed below the bottom of the tray weight 34, and may be disposed above the tray weight 34 or in other locations instead. The pull weight cylinder 98 is disposed above the support tower 25, and the pull weight cylinder 98 may be disposed on the top plate 8, or may be replaced in other ways and locations that allow relative movement between the support tower 25 and the top plate 8. The tubular weight is 6 in this figure, and there are 6 layers in the support yard tower that corresponds, and the vaulting pole that every layer set up has 3. In practice, can set up N tube-shape weights as required, hold in the palm the sign indicating number tower number of piles can N layer, and the vaulting pole quantity that every layer corresponds is 2. The disk-shaped weights in the drawing are 3, the number of incomplete disk steps arranged on each code pulling rod is 3, and the number of the code pulling rods is 3. In practice, can set up N disk weights as required, every incomplete disc step quantity N layer of code bar, the quantity of code bar 2. The rotation angle of the code pulling rod is controlled by a position sensor, and 3 weights correspond to 4 position sensors. If N weights are arranged, N +1 position sensors are needed to sense the rotation angle of the code pulling rod, and therefore loading and unloading substitution of the disc-shaped weights is achieved. The position sensor is preferably a photoelectric sensor, but other sensors can be used instead. The toothed belt 14 and the toothed pulley 15 may be provided below the linear bearing 13 or may be provided above the linear bearing 13.

The supporting leg 1 is fixed with a lower plate 9, a linear bearing 3 is arranged on the lower plate 9, the linear bearing 3 is used for positioning the guide optical axis 4, and a guide sleeve or a fixed sleeve can be selected. The lower plate 9 and the upper plate 8 are connected through the guide optical axis 4, the middle plate 7 is connected with the linear bearing 5, and the linear bearing 5 can move up and down on the guide optical axis 4. An upper ejection cylinder 99 is installed between the lower plate 9 and the upper plate 8, and a cylinder piston (piston rod 89) and a cylinder body are connected to the lower plate 9 and the upper plate 8, respectively.

When the upper plate 8 and the weight loading and unloading device need to be lifted, the screw 93 between the fixed upper plate 8 and the guide optical axis 4 is unscrewed, the upper jacking cylinder 99 moves, the upper plate 8, the weight loading and unloading device 80 and the middle plate 7 are jacked up, the spring pin 6 is arranged on the connecting sleeve outside the linear bearing 5, the annular groove is formed in the guide optical axis 4, when the upper jacking cylinder 99 jacks the upper plate 8, the weight loading and unloading device 80 and the middle plate 7, the spring pin 6 is inserted into the annular groove of the guide optical axis 4 or is not arranged, the spring pin 6 is directly inserted into the upper end face of the linear sliding rail 4, so that when the upper jacking cylinder 99 is prevented from suddenly losing gas, the upper plate 8 suddenly falls, and the personal safety of an operator when the weight is taken out and put in is guaranteed.

the principle of the invention is shown in the figures. The jacking cylinder can be realized by a screw rod nut mechanism, a hydraulic oil cylinder mechanism, an electromagnetic driving mechanism or other mechanisms capable of realizing linear motion.

The invention combines the free combination code adding mode of the cylindrical weight and the sequential combination code adding mode of the disc-shaped weight, fully utilizes the advantages of the two code adding modes, and realizes the combination and loading of different weights by using less weights and smaller volume.

The device adopts a three-plate structure, an upper plate, a lower plate and a linear slide rail are fixed to form a basic frame, and an intermediate plate can move on the linear slide rail; the lower plate is connected with the intermediate plate through a fixing sleeve, the fixing sleeve can be a linear bearing, the linear slide rail is fixed on the lower plate through the fixing sleeve and a backing plate, and the intermediate plate can move up and down through the linear bearing; the device can be provided with a corresponding device for controlling the actions of weight loading and unloading, floating and the like, so as to realize automatic loading and unloading.

the weight loading and unloading device mainly depends on manual operation to load and unload the weight of the existing piston pressure gauge, and a device without supporting and guiding ensures the stability and reliability of the work. And the linear bearing is installed by adopting a three-plate structure, the middle plate moves on the linear slide rail through the linear bearing to realize the action of loading and unloading weights, and the structure is simple and practical, and the reliability and the stability are high. The problems of inclination and the like when the weight is loaded can not occur. The jacking cylinder is adopted to jack the upper plate and control the weight loading and unloading device, so that the physical labor can be reduced, and the weights can be conveniently and quickly placed in and taken out.

The invention ensures that the rotating speed of the tray weight and the weight meet the set value without generating obvious interference to the system. When the tray weight rotates inertia not enough, apply external force to the tray weight and make the tray weight rotate, when the effort was applyed to the manual work, its size of unable accurate control destroyed the original rotation state of tray weight easily, has reduced measurement efficiency and reading accuracy nature to probably produce the injury to the piston rod. The air nozzles are uniformly arranged around the tray weight, so that the air pressure generated on the tray weight is uniformly distributed along the periphery of the tray weight, the tray weight is uniformly stressed, and the air blowing acceleration process cannot generate obvious interference on the rotation of the tray weight.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.

Claims

1. The dual-motor pressure generating system of the weight loading mechanism is characterized by comprising a piston cylinder (61) and a piston (60) for generating pressure, wherein the piston (60) is connected with a lead screw (57), and the lead screw (57) is connected with an axially fixed screw sleeve (56); the screw sleeve (56) is connected with a first servo motor (51) which drives the screw sleeve (56) to rotate through a clutch (54);

The pressure output end of the piston cylinder (61) is connected with a gauge connecting seat (77) of a pressure gauge (78) and a pressure relief valve (74) in parallel;

the pressure cavity at the rear part of the pressure output end of the piston cylinder (61) is connected with the output end of an increasing valve (73), and the oil supply end of the increasing valve (73) is connected with the oil outlet of a pre-pressurizing pump (70); an oil inlet of the pre-pressurizing pump (70) is connected with an oil cup (75);

The pumping execution mechanism of the pre-pressurizing pump (70), the opening and closing action mechanism of the pressure relief valve (74) and the opening and closing action mechanism of the increasing valve (73) are respectively connected with a power output part through clutches;

The power output part comprises the first servo motor (51) and a transmission mechanism for outputting the rotation action of the first servo motor (51); the transmission mechanism is a chain and chain wheel transmission mechanism, and is connected with a pumping execution mechanism of the pre-pressurizing pump (70);

The power output part also comprises a power unit which is connected with the opening and closing action mechanism of the pressure release valve (74) and the opening and closing action mechanism of the increasing valve (73) and consists of a second servo motor (40) and a transmission part.

2. the dual-motor pressure generating system of the weight loading mechanism according to claim 1, wherein the output end (44) of the pressure generating system is associated with and drives the lower piston rod (92) to extend and retract;

The lower piston rod (92) for weighing or pressure calibration is connected with a piston weight (31);

The upper part of the piston weight (31) is hung at the center of the upper barrel mouth of the cylindrical hanging basket weight (33); the outer side of the bottom of the cylinder wall of the hanging basket weight (33) is connected with a radial annular weight tray (23), and annular disc-shaped weights (22) which are arranged in a stacked mode are borne on the weight tray (23);

The upper part of the piston weight (31) is also connected with a tray weight (34) positioned above the hanging basket weight (33) through a connecting structure; a group of sleeved cylindrical weights (20) is arranged on the tray weight (34);

The disc-shaped weight (22) is provided with a disc-shaped weight loading and unloading unit;

The tubular weight (20) is provided with a tubular weight loading and unloading unit.

3. The dual-motor compression system of the weight loading mechanism according to claim 1, wherein the pre-pressure pump (70) is of a cylinder structure, and the pumping actuator of the pre-pressure pump (70) is a pre-pressure pump piston rod (72).

4. The dual-motor pressure generating system of the weight loading mechanism according to claim 1, wherein the one-way oil path in the system is realized by arranging a one-way valve.

5. The dual-motor crimping system of the weight loading mechanism according to claim 1, characterized in that a displacement sensor (59) for determining the position of the movable end of the piston (60) is arranged in the piston cylinder (61), and the displacement sensor (59) is connected with a control terminal for limiting the piston (60).

6. The dual-motor pressure generating system of the weight loading mechanism according to claim 1, wherein the pressure output end of the piston cylinder (61) is further provided with a pressure sensor (76), and the pressure sensor (76) is connected with a controller for controlling the rotation speed of the first servo motor (51).

7. The dual-motor compression system of the weight loading mechanism according to claim 2, wherein the cylindrical weight and the cylindrical weight loading and unloading unit are constructed as follows

The upper end of each layer of the tubular weights (20) is provided with a driving mechanism for driving the tubular weights (20) to move up and down; a tray weight (34) for weighing or pressure detection is arranged below the cylindrical weight (20); the height of the tubular weight (20) is gradually reduced from inside to outside; a supporting bulge (91) is arranged on the outer cylindrical surface of the upper end of each cylindrical weight (20);

The driving mechanism comprises a group of horizontally telescopic code supporting rods (27) which are arranged on the circumference of the supporting bulge (91) of each cylindrical weight (20) at intervals, and the rear part of each code supporting rod (27) is connected with a code supporting rod driving cylinder (24); each brace rod driving cylinder (24) is fixed on a support tower (25) vertically driven by a pull weight cylinder (98).

8. The dual-motor pressure generating system of the weight loading mechanism according to claim 7, wherein the code tower (25) is arranged in a tower-shaped structure corresponding to the top of the cylindrical weight (20); each group of the brace rods (27) is at least 3.

9. The dual-motor compression building system of the weight loading mechanism of claim 2, wherein the disc-shaped weight and the disc-shaped weight loading mechanism are:

The edge of the disc-shaped weight (22) is provided with a flange;

The disc-shaped weight loading mechanism comprises at least three code pulling rods (16) which are vertically arranged on the periphery of the disc-shaped weight (22) and have the same structure; the plurality of code pulling rods (16) are respectively and synchronously connected with vertical driving units which move up and down in a mode of rotating around the axes of the code pulling rods;

draw code bar (16) to correspond every layer in the axial the flange of disc weight (22) sets up radial outside overlap joint flange (95), every layer overlap joint flange (95) with the flange faying surface of disc weight (22) with draw code bar (16) by supreme orientation grow gradually down, make certainly disc weight (22) and every layer the whole overlap joint of overlap joint flange (95) begins, draw code bar (16) rotate a week from top to bottom every layer overlap joint flange (95) with disc weight (22) break away from the overlap joint one by one.