CN219265453U - Vertical lifting butt joint mechanism and diaphragm gas meter movement error curve detection table - Google Patents
Vertical lifting butt joint mechanism and diaphragm gas meter movement error curve detection table Download PDFInfo
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- CN219265453U CN219265453U CN202320623835.7U CN202320623835U CN219265453U CN 219265453 U CN219265453 U CN 219265453U CN 202320623835 U CN202320623835 U CN 202320623835U CN 219265453 U CN219265453 U CN 219265453U
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Abstract
The utility model discloses a vertical lifting butt joint mechanism, which is characterized in that: comprises a mounting block, a driving cylinder, a transmission assembly and a rigid shrink tube; the driving cylinder is fixedly arranged on the mounting block, a push rod of the driving cylinder faces downwards vertically and is fixedly connected with the upper section of the transmission assembly, the lower section of the transmission assembly is fixedly connected with the lower section movable part of the rigid ascending and shrinking pipe, the lower end of the transmission assembly is provided with a circular ring part sleeved on the lower end movable part of the rigid ascending and shrinking pipe, and the lower end face of the circular ring part is propped against the O-shaped sealing ring; the outer diameter of the circular ring part is consistent with the outer diameter of the flange, and the circular ring part and the O-shaped sealing ring together form an air suction interface for sealing an air outlet inserted into the movement. The utility model also discloses a diaphragm gas meter movement error curve detection table. The utility model has the advantages of good test consistency and high detection precision.
Description
Technical Field
The utility model belongs to the field of film type gas meter movement error curve detection tables, and particularly relates to a vertical lifting butt joint mechanism and a film type gas meter movement error curve detection table.
Background
The diaphragm gas meter is a meter for measuring the gas consumption, and the error of the diaphragm gas meter is the ratio between the difference between the measurement volume displayed by the diaphragm gas meter and the volume of the gas flow actually passing through the diaphragm gas meter; the error is a key parameter index for evaluating the quality of the membrane type gas meter product and ensuring the fairness of gas settlement for users.
The movement in the diaphragm gas meter is a core part for metering, and the metering error of the diaphragm gas meter can be reflected by detecting the movement error curve, so that the diaphragm gas meter delivered from the factory can be better ensured to meet the metering precision and quality control requirements.
CN107702770a and CN207556631U (technical scheme of reporting on the same day) in the prior art disclose a detection device for a movement speed curve of a diaphragm gas meter, and the detection device comprises:
the serial port module is connected with the PC end through a USB-to-serial port line and is used for serial port communication;
the controller is connected with the serial port module through a DuPont line;
the photoelectric encoder is connected with the controller and is used for measuring the position information of the rotary motion of the movement of the diaphragm gas meter;
and the code disc is adhered to the valve cover and is mounted on the valve grating of the diaphragm gas meter core together with the code disc.
However, the above "detection device for rate curve of diaphragm gas meter movement" still has the following disadvantages:
at present, when in actual use, the film type gas meter movement is required to be arranged on a tool of sonic nozzle type gas meter inspection equipment, and an air outlet pipe on the film type gas meter movement is well connected with an air suction interface on a detection device; the auxiliary action of realizing the movement metering of the membrane gas meter movement is finished manually at present, the manual operation is easy to be tired and the consistency and reliability of the sealing of the joint are difficult to be ensured, and then the error curve detection result is interfered, so that the detection accuracy is influenced.
Based on the above, the applicant considers designing a vertical lifting butt joint mechanism which can better ensure the butt joint consistency of the air suction interface of the test bench and the air outlet pipe orifice on the membrane gas meter movement and better ensure the detection accuracy and the error curve detection bench of the membrane gas meter movement.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model aims to solve the technical problems that:
how to provide a vertical lift docking mechanism that can better ensure the test bench inhale interface and the membrane gas table core on give vent to anger mouth of pipe department butt joint uniformity, better ensure to detect the accurate and detect platform with membrane gas table core error curve.
In order to solve the technical problems, the utility model adopts the following technical scheme:
vertical lift docking mechanism, its characterized in that: comprises a mounting block, a driving cylinder, a transmission assembly and a rigid shrink tube;
the mounting block is used for being fixedly mounted on a vertical mounting surface arranged on a frame of the error curve detection table of the movement of the diaphragm gas meter;
an L-shaped airflow channel rotating clockwise at 90 degrees is arranged in the mounting block in a penetrating manner;
the vertical outer end of the L-shaped airflow channel is an input end; the input end is in sealing connection with the sealing ring through threads between the input end and a threaded interface at the upper end of the rigid ascending and contracting pipe; the edge of the lower end of the rigid rising pipe is provided with a circle of flange, and the upper end surface of the flange is sleeved with an O-shaped sealing ring;
the transverse outer end of the L-shaped airflow channel is an output end, the end face where the output end is positioned is fixedly connected with a vertical mounting surface on the rack in a sealing way, and the vertical mounting surface is provided with a through hole for exposing the output end; the output end is communicated with the input end of the main electric control valve in a sealing way through a pipeline;
the driving cylinder is fixedly arranged on the mounting block, a push rod of the driving cylinder faces downwards vertically and is fixedly connected with the upper section of the transmission assembly, the lower section of the transmission assembly is fixedly connected with the lower section movable part of the rigid ascending and shrinking pipe, the lower end of the transmission assembly is provided with a circular ring part sleeved on the lower end movable part of the rigid ascending and shrinking pipe, and the lower end face of the circular ring part is propped against the O-shaped sealing ring;
the outer diameter of the circular ring part is consistent with the outer diameter of the flange, and the circular ring part and the O-shaped sealing ring together form an air suction interface for sealing an air outlet inserted into the movement.
Compared with the prior art, the vertical lifting butt joint mechanism in the technical scheme has the advantages that:
1. the air suction interface of the test board is in butt joint with the air outlet of the machine core, and is easy and accurate to control in a remote way, and the action consistency is good
By adopting the technical scheme, the push rod can be informed of the extension and retraction by controlling the driving cylinder, so that the transmission assembly is driven to act and the lower section of the rigid ascending and contracting pipe is driven to realize the extension and retraction in the vertical direction, thereby realizing the sealing butt joint and the separation between the air suction interface and the air outlet on the movement, and better ensuring the consistency of each butt joint and the separation action;
2. seal butt joint reliability can be effectively guaranteed
The flange at the lower end of the rigid ascending pipe and the circular ring part at the lower end of the transmission component can realize reliable clamping of the O-shaped sealing ring, and can better ensure the sealing reliability when the air suction interface is inserted into the air outlet of the machine core.
Drawings
FIG. 1 is a schematic diagram of a diaphragm gas meter movement (top view)
FIG. 2 is a schematic diagram of a membrane gas meter movement (looking up)
FIG. 3 is a schematic diagram of a film gas meter movement error curve detection table in the present technical scheme
Fig. 4 is a schematic structural diagram of a film type gas meter movement error curve detection table in the present technical scheme
Fig. 5 is a schematic structural view of a vertical lifting docking mechanism in the present embodiment
FIG. 6 is an exploded view of a vertical lift docking mechanism in the present embodiment
Fig. 7 is a schematic structural view of a movement metering motion detection mechanism in the present embodiment
FIG. 8 is an exploded view of a portion of the movement metering action detection mechanism of the present embodiment
Marked in the figure as:
film type a gas meter movement: a1 crank, A2 deflector rod and A3 positioning convex column
Diaphragm type gas table core error curve detects platform:
a 100 rack;
constant flow air extraction system: 101 air suction interface, 102 general electric control valve, 103 filter, 104 stagnation container, 105 vacuum container (1051T joint), 106 sonic nozzle, 107 branch electric control valve
Core error curve detection station: 108 guiding limit strips, 109 positioning stop blocks
110 hoop
Vertical lift interfacing mechanism:
200 mounting block (2001 output end), 201 driving cylinder, 202 rigid shrink tube (2021 flange, 2022 core tube (20221 shoulder), 2023 movable sleeve)
And a transmission assembly: 203 main driving block, 204 driving rod, 205 driving piece (2051 connecting flange)
206O type sealing ring
Movement metering action detection mechanism:
300 mounting bracket
Crank rotation detecting unit: 301 membrane gas meter magnetic transmission assembly (3011 plectrum, 3012 outer magnetic group, 3013 inner magnetic group), 302 induction sheet, 303 groove type proximity switch; 304 reflection type optical fiber sensor probe
Detailed Description
The present utility model will be described in further detail with reference to the accompanying drawings.
The specific implementation method comprises the following steps: as shown in figures 1 to 8 of the drawings,
the film type gas meter movement error curve detection table comprises a frame, a constant flow air extraction system and a measurement and control system;
at least one core error curve detection station is fixedly arranged on the frame;
the constant flow air extraction system comprises an air suction interface, a total electric control valve, a filter, a stagnation container, a constant flow regulating pipeline, a vacuum container and a vacuum pump which are sequentially and hermetically connected in series from front to back in the airflow flowing direction; the constant-current regulating and controlling pipeline comprises at least two regulating and controlling branches connected in parallel between the stagnation container and the vacuum container, and each regulating and controlling branch is connected with a sonic nozzle and an electric control valve for the branch in series;
the measurement and control system comprises an atmospheric parameter measurement unit for measuring the temperature, the air pressure and the humidity parameters of the atmosphere around the movement error curve detection station; the device also comprises a stagnation parameter measuring unit for measuring the air pressure and temperature parameters in the stagnation container; the metering detection mechanism is used for measuring the metering of the movement error curve detection station movement and the flowmeter is used for measuring the actual flow in the constant flow pumping system; the controller is used for controlling the total electric control valve, the electric control valve for the branch circuit and the vacuum pump;
each movement error curve detection station comprises a movement positioning mechanism and a vertical lifting butt joint mechanism;
the movement positioning mechanism comprises a guide limit bar and a positioning stop block which are fixed on the table top of the frame; the guide limit strip is of a strip-shaped structure and is provided with a guide groove with an opening at the top, and the guide groove is used for inserting, guiding and directionally moving a positioning convex column protruding downwards from the bottom of the machine core along the guide groove; the positioning stop block is integrally and fixedly arranged at the outer side position adjacent to the end part of the guide limit strip in the length direction and is used for blocking and positioning the side end of the movement which moves along the guide groove in a directional manner;
the vertical lifting butt joint mechanism is used for driving the air suction interface to vertically move and realizing sealing butt joint or separation between the air suction interface and an air outlet on the positioned movement.
The technical scheme film type gas meter movement error curve detection table has the advantages that:
1. the vertical sealing butt joint and the separation between the air suction interface on the detection table and the air outlet on the machine core are realized through the vertical lifting butt joint mechanism, so that the consistency and the reliability of the sealing butt joint at the air suction interface can be effectively ensured; the manual labor intensity is reduced, the condition of inaccurate detection results caused by inconsistent manual butt joint is overcome, and the objective accuracy of detection is better ensured.
2. The automatic feeding and taking device is more efficient in detection, and is easy to be matched with a manipulator on an automatic assembly production line to automatically finish feeding and taking actions required by detection.
When in implementation, the atmospheric parameter measuring unit comprises a temperature sensor, a pressure sensor and a humidity sensor; the stagnation parameter measuring unit includes a temperature sensor and a pressure sensor.
The atmospheric parameter measuring unit and the stagnation parameter measuring unit are respectively connected with the controller in a signal manner; the measurement and control system also comprises an upper computer, and the upper computer is in communication connection with the controller.
After the technical scheme is adopted, software on an upper computer (industrial personal computer) can be used for collecting, processing and detecting data and measuring an error curve, and verification flow (qmax, 0.2qmax and qmin) can be selected and set conveniently according to the specifications (G1.6, G2.5 and G4) of the diaphragm gas meter.
In implementation, the controller is a PLC controller. The upper computer is a desktop computer.
The machine core error curve detection stations are double stations arranged side by side;
the number of the vacuum containers in the constant flow air extraction system is one; the air suction interface, the total electric control valve, the filter, the stagnation container and the constant flow regulating pipeline in the constant flow air suction system are two sets which are arranged in one-to-one correspondence with the double stations; the two constant-current regulating pipelines are provided with regulating branches with the same number;
the vacuum container is fixedly provided with a plurality of T-shaped connectors which are equal to the regulating branches in each set of constant current regulating pipeline in number, the T-shaped connectors are uniformly distributed at intervals in the height direction of the vacuum container, the vertical lower end of each T-shaped connector is a connecting end which is fixedly sealed with the vacuum container, and the two ends of each T-shaped transverse connecting pipe of each T-shaped connector are respectively connected with the tail end of a single regulating branch.
The technical scheme has the advantages that:
the arrangement of double stations and the same vacuum container in the constant flow air extraction system can greatly reduce the cloth volume required by the constant flow air extraction system, help reduce the occupied space of the error curve detection table of the film type gas meter movement and improve the compactness of the structure.
The two sets of the air suction interfaces, the total electric control valve, the filter, the stagnation container and the constant flow regulating pipeline are arranged and installed on the frame in a bilateral symmetry mode; and the main electric control valve, the filter, the stagnation container and the constant-current regulation and control pipeline are all arranged in the inner space of the frame.
Therefore, the internal space of the frame can be fully utilized to accommodate and mount the components, and the appearance of the detection table is more concise; meanwhile, the outer side panel of the detection table can be used for protecting and isolating dust, and durable and reliable operation actions of all components of the constant flow air extraction system in the interior are better ensured.
In addition, after the components are arranged in the bilateral symmetry mode, the vacuum container and the connection of the T-shaped connectors of the vacuum container can form bilateral symmetry structural arrangement, the anchor ear and the connecting pipeline are convenient to be used for efficiently assembling and connecting two adjacent interfaces, and the assembly efficiency is improved.
In practice, a first embodiment (not shown) of the vertical lift docking mechanism may be employed:
the vertical lifting butt joint mechanism comprises a support frame, a guide rail vertically arranged on the support frame and a sliding block slidingly assembled on the guide rail; a driving cylinder is fixedly arranged on the supporting frame, and a push rod of the driving cylinder faces downwards and is fixedly connected with the upper end of the sliding block;
the sliding block is fixedly connected with the outer side of the air suction interface through a supporting connecting piece.
Therefore, the accurate consistency of vertical displacement is ensured through the guide rail and the sliding block in the vertical lifting butt joint mechanism, and the accurate butt joint between the air suction interface and the air outlet of the movement is ensured.
In practice, a second embodiment (preferred embodiment, as shown in fig. 3, 5 and 6) of the vertical lift docking mechanism may be:
the vertical lifting butt joint mechanism comprises a mounting block, a driving cylinder, a transmission assembly and a rigid lifting pipe;
the mounting block is used for being fixedly mounted on a vertical mounting surface arranged on a frame of the error curve detection table of the movement of the diaphragm gas meter;
an L-shaped airflow channel rotating clockwise at 90 degrees is arranged in the mounting block in a penetrating manner;
the vertical outer end of the L-shaped airflow channel is an input end; the input end is in sealing connection with the sealing ring through threads between the input end and a threaded interface at the upper end of the rigid ascending and contracting pipe; the edge of the lower end of the rigid rising pipe is provided with a circle of flange, and the upper end surface of the flange is sleeved with an O-shaped sealing ring;
the transverse outer end of the L-shaped airflow channel is an output end, the end face where the output end is positioned is fixedly connected with a vertical mounting surface on the rack in a sealing way, and the vertical mounting surface is provided with a through hole for exposing the output end; the output end is communicated with the input end of the main electric control valve in a sealing way through a pipeline;
the driving cylinder is fixedly arranged on the mounting block, a push rod of the driving cylinder faces downwards vertically and is fixedly connected with the upper section of the transmission assembly, the lower section of the transmission assembly is fixedly connected with the lower section movable part of the rigid ascending and shrinking pipe, the lower end of the transmission assembly is provided with a circular ring part sleeved on the lower end movable part of the rigid ascending and shrinking pipe, and the lower end face of the circular ring part is propped against the O-shaped sealing ring;
the outer diameter of the circular ring part is consistent with the outer diameter of the flange, and the circular ring part and the O-shaped sealing ring together form an air suction interface for sealing an air outlet inserted into the movement.
The vertical lifting butt joint mechanism in the technical scheme has the advantages that:
1. the air suction interface of the test board is in butt joint with the air outlet of the machine core, and is easy and accurate to control in a remote way, and the action consistency is good
By adopting the technical scheme, the push rod can be informed of the extension and retraction by controlling the driving cylinder, so that the transmission assembly is driven to act and the lower section of the rigid ascending and contracting pipe is driven to realize the extension and retraction in the vertical direction, thereby realizing the sealing butt joint and the separation between the air suction interface and the air outlet on the movement, and better ensuring the consistency of each butt joint and the separation action;
2. seal butt joint reliability can be effectively guaranteed
The flange at the lower end of the rigid ascending pipe and the circular ring part at the lower end of the transmission component can realize reliable clamping of the O-shaped sealing ring, and can better ensure the sealing reliability when the air suction interface is inserted into the air outlet of the machine core.
The rigid shrink tube comprises an axially-through core tube and a movable sleeve;
the outer side of the upper end of the core tube is provided with a shoulder, the upper end surface of the shoulder is provided with an annular sealing groove embedded with an O-shaped sealing ring, and the upper end surface of the shoulder is used for realizing sealing butt joint with a step surface of a step hole which is arranged corresponding to the vertical outer end of the L-shaped airflow channel as an input end; external threads are arranged on the circumferential side surface of the shoulder of the core tube, and the external threads are matched with corresponding internal threads in the stepped hole to realize thread fixed connection;
the movable sleeve is sleeved on the lower section of the core tube in a sliding sealing manner, and the flange and the O-shaped sealing ring are arranged at the lower end of the movable sleeve.
The rigid ascending shrink tube comprises a core tube and a movable sleeve, so that reliable sealing and fixed connection between the core tube and the mounting block can be realized by utilizing the core tube, and a pipeline for conveying air flow is formed;
the movable sleeve is sleeved on the lower section of the core pipe in a sliding manner, and the core pipe not only plays a role in a pipeline, but also plays a role in a guide post to ensure that the movable sleeve realizes a vertical telescopic action along the axial direction of the core pipe. The movable sleeve is fixedly connected with the transmission assembly, and the transmission assembly can be driven by the driving cylinder to enable the movable sleeve to reliably stretch.
The whole appearance of the mounting block is of a rectangular body type structure; the side of the mounting block is provided with a pressure measuring hole communicated with the L-shaped airflow channel.
The installation block of the rectangular structure has the advantages of high structural strength and simple appearance;
meanwhile, when the method is implemented, the installation block is preferably a hard metal block, and the installation block with a rectangular structure is square in shape, so that the installation block is easy to clamp and utilizes a machining center to carry out drilling and cutting machining on all surfaces, helps to reduce positioning machining difficulty, can ensure high structural strength, and can be used permanently and reliably.
The driving cylinder is fixedly arranged on the top surface of the mounting block;
the transmission assembly comprises a main driving block, a transmission rod and a driving piece;
the main driving block is integrally flat, and the top surface of the mounting block is provided with a yielding groove for the vertical lifting movement of the main driving block;
two vertical perforations are vertically and penetratingly arranged on the parts, which are positioned on the two outer sides of the L-shaped airflow channel, of the mounting part, and the upper ends of the vertical perforations are communicated with the abdication grooves; one transmission rod is inserted in each vertical through hole in a sliding manner, and the upper end of each transmission rod is fixedly connected with the main driving block;
the upper end of the driving piece is fixedly connected with the lower end of the transmission rod, and the lower end of the driving piece is provided with the circular ring part.
The driving piece is integrally of a sleeve-shaped structure, and the upper end of the sleeve-shaped structure is outwards protruded in the radial direction to form a circle of connecting flanges for fixing the lower end of the transmission rod.
The lower end face of the mounting block is provided with a lower groove for the connecting flange of the driving piece to retract and completely fill the whole body.
The movement metering action detection mechanism in the technical scheme has the advantages that:
1. according to the technical scheme, the electric signal for metering is directly triggered and generated by the shifting lever of the crank on the movement, and the auxiliary metering procedure before related detection is not needed in advance, so that the detection efficiency is naturally and more efficient; in addition, the auxiliary device for detection is not required to be arranged on the machine core, so that the consistency and the accuracy in each detection can be better ensured.
2. In the prior art, the detection action position for the movement metering is positioned on a valve gate or a rocker arm with larger action amplitude; correspondingly, the motion amplitude is larger, the regular motion time period is longer, the error of metering detection is larger, and the detection precision is lower.
According to the technical scheme, the rapidly selected crank and the shifting lever thereof are selected as detection targets of the metering action of the movement, the crank and the shifting lever thereof always perform circular rotary motion, the regular action time period is shorter, the action frequency is higher, and the metering detection precision is higher.
The mounting brackets are arranged on the left side and the right side of the length direction of the movement error curve detection station of the diaphragm gas meter movement error curve detection table.
Because the diaphragm gas meter has two structural forms of left inlet and right outlet and right inlet and left outlet, the setting position of the crank in each structural form is different;
according to the technical scheme, the mounting brackets are arranged on the left side and the right side of the length direction of the movement error curve detection station of the membrane type gas meter movement error curve detection table, so that two different structural forms can be simultaneously applied, the universality of the detection table in the technical scheme is improved, and the detection cost is reduced.
A second embodiment of the movement metering action detection mechanism is shown in fig. 7 and 8:
the crank rotation detection unit comprises an intermediate transmission assembly, an induction piece and a correlation proximity switch;
the intermediate transmission assembly has a fixed portion, a drive portion and a transmission portion; the middle transmission assembly is fixedly arranged on the mounting bracket through a fixing part of the middle transmission assembly; the driving part is provided with a radially outwards protruding plectrum, and the plectrum is used for being driven by the deflector rod and rotating with the crank in a follow-up way; the transmission part is coaxially and drivingly connected with the driving part, the outer end of the transmission part is fixedly provided with the induction piece, and the induction piece is provided with at least one extending part radiating from the axis to the periphery along the radial direction;
the opposite type proximity switch is fixedly arranged on the mounting bracket, and the transmitting end and the receiving end of the opposite type proximity switch are arranged in an opposite mode and are opposite to the connecting line on the rotating path of the extending part of the induction piece.
The intermediate transmission assembly can be driven by the toggle rod of the crank to realize synchronous rotation, so that the metering action of the crank is synchronously transmitted to the sensing piece, the action of the extending part of the sensing piece can be detected through the correlation proximity switch, and accurate measurement of the metering of the movement is smoothly realized.
The opposite-type proximity switch is an integrally formed groove-type proximity switch.
Therefore, the integration of the groove-shaped proximity switch is better, the design of the supporting structures of the transmitting end and the receiving end can be saved, and the installation is more convenient.
The intermediate transmission assembly is a magnetic transmission assembly for a diaphragm gas meter.
The magnetic transmission component for the diaphragm gas meter can output rotation synchronization of the crank to help to realize accurate metering, and the magnetic transmission component for the diaphragm gas meter can also be used for testing movement errors with high precision.
When the magnetic transmission assembly for the diaphragm gas meter is implemented, the structure of the magnetic transmission assembly is as shown in CN113932871A, namely a small magnetic transmission structure for the diaphragm gas meter, the magnetic transmission assembly comprises an outer magnetic group and an inner magnetic group, wherein the inner magnetic group is positioned on the inner side of the outer magnetic group, the outer magnetic group comprises a first outer magnetic sleeve, a second outer magnetic sleeve and an outer magnet, the outer magnet is an annular cylinder, and the first outer magnetic sleeve and the second outer magnetic sleeve are respectively clamped at two ends of the outer magnet; the inner magnetic group comprises a first inner magnetic sleeve, a second inner magnetic sleeve and an inner magnet, the inner magnet is also an annular cylinder, and the first inner magnetic sleeve and the second inner magnetic sleeve are respectively clamped at two ends of the inner magnet; the outer magnet is made of ferrite material, and the inner magnet is made of neodymium iron boron material.
In the technical scheme, the shaft sleeve in the 'small magnetic transmission structure of the diaphragm gas meter' is fixedly arranged on the mounting bracket, the outer magnetic group is coaxial with the crank on the movement to be detected, the shifting block on the outer magnetic group is used for being driven to rotate by the shifting rod on the crank, and the threaded connecting column in the inner magnetic group is fixedly connected with the sensing piece through the connecting seat.
The induction piece is of a cross-shaped structure as a whole.
Thus, the number of rotations is counted four times, that is, the frequency of the metering technology is increased, thereby helping to improve the error detection precision.
As shown in fig. 3, a first and a second embodiment of an organic movement metering motion detection mechanism are included, wherein the first embodiment is:
the crank rotation detection unit is one of a reflective optical fiber sensor or a capacitive proximity switch, and a probe of the crank rotation detection unit is fixed on the mounting bracket and is positioned at the radial outer side of the crank; the probe can generate a trigger electric signal when the probe is nearest to a shift lever on a crank in a circle.
The optical fiber probe of the reflective optical fiber sensor has the advantages of small structure, convenience in cloth and accurate detection, and can ensure the metering detection precision of the test bench.
The method for testing the error of the movement of the diaphragm gas meter adopts the error curve detection table of the movement of the diaphragm gas meter;
the method comprises the following steps:
first, preparation before detection:
setting verification flow qmax, 0.2qmax and qmin, and setting verification time corresponding to each verification flow;
secondly, feeding the movement to be detected:
loading cores to be detected in error curve detection stations of the cores, and sealing and butting an air suction interface with an air outlet on the cores to be detected;
third step, error curve detection and recording:
starting a constant flow air extraction system, and recording each detection parameter by a measurement and control system;
fourth, the measurement and control system judges whether the core metering error index is qualified or not and outputs a judging result:
if the maximum error under each verification flow is less than six thousandths, the test is qualified; if the maximum error under any verification flow is greater than or equal to six thousandths, the test flow is failed.
According to the method for testing the error of the movement of the diaphragm gas meter, the diaphragm gas meter movement error curve detection table is adopted, so that the method has the advantages of being high in detection effect, good in detection consistency and guaranteed in detection precision.
The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and improvements made by those skilled in the art without departing from the present technical solution shall be considered as falling within the scope of the claims.
Claims (7)
1. Vertical lift docking mechanism, its characterized in that: comprises a mounting block, a driving cylinder, a transmission assembly and a rigid shrink tube;
the mounting block is used for being fixedly mounted on a vertical mounting surface arranged on a frame of the error curve detection table of the movement of the diaphragm gas meter;
an L-shaped airflow channel rotating clockwise at 90 degrees is arranged in the mounting block in a penetrating manner;
the vertical outer end of the L-shaped airflow channel is an input end; the input end is in sealing connection with the sealing ring through threads between the input end and a threaded interface at the upper end of the rigid ascending and contracting pipe; the edge of the lower end of the rigid rising pipe is provided with a circle of flange, and the upper end surface of the flange is sleeved with an O-shaped sealing ring;
the transverse outer end of the L-shaped airflow channel is an output end, the end face where the output end is positioned is fixedly connected with a vertical mounting surface on the rack in a sealing way, and the vertical mounting surface is provided with a through hole for exposing the output end; the output end is communicated with the input end of the main electric control valve in a sealing way through a pipeline;
the driving cylinder is fixedly arranged on the mounting block, a push rod of the driving cylinder faces downwards vertically and is fixedly connected with the upper section of the transmission assembly, the lower section of the transmission assembly is fixedly connected with the lower section movable part of the rigid ascending and shrinking pipe, the lower end of the transmission assembly is provided with a circular ring part sleeved on the lower end movable part of the rigid ascending and shrinking pipe, and the lower end face of the circular ring part is propped against the O-shaped sealing ring;
the outer diameter of the circular ring part is consistent with the outer diameter of the flange, and the circular ring part and the O-shaped sealing ring together form an air suction interface for sealing an air outlet inserted into the movement.
2. The vertical lift docking mechanism of claim 1, wherein: the rigid shrink tube comprises an axially-through core tube and a movable sleeve;
the outer side of the upper end of the core tube is provided with a shoulder, the upper end surface of the shoulder is provided with an annular sealing groove embedded with an O-shaped sealing ring, and the upper end surface of the shoulder is used for realizing sealing butt joint with a step surface of a step hole which is arranged corresponding to the vertical outer end of the L-shaped airflow channel as an input end; external threads are arranged on the circumferential side surface of the shoulder of the core tube, and the external threads are matched with corresponding internal threads in the stepped hole to realize thread fixed connection;
the movable sleeve is sleeved on the lower section of the core tube in a sliding sealing manner, and the flange and the O-shaped sealing ring are arranged at the lower end of the movable sleeve.
3. The vertical lift docking mechanism of claim 1, wherein: the whole appearance of the mounting block is of a rectangular body type structure; the side of the mounting block is provided with a pressure measuring hole communicated with the L-shaped airflow channel.
4. A vertical lift docking mechanism according to any one of claims 1 to 3, characterized in that: the driving cylinder is fixedly arranged on the top surface of the mounting block;
the transmission assembly comprises a main driving block, a transmission rod and a driving piece;
the main driving block is integrally flat, and the top surface of the mounting block is provided with a yielding groove for the vertical lifting movement of the main driving block;
two vertical perforations are vertically and penetratingly arranged on the parts, which are positioned on the two outer sides of the L-shaped airflow channel, of the mounting part, and the upper ends of the vertical perforations are communicated with the abdication grooves; one transmission rod is inserted in each vertical through hole in a sliding manner, and the upper end of each transmission rod is fixedly connected with the main driving block;
the upper end of the driving piece is fixedly connected with the lower end of the transmission rod, and the lower end of the driving piece is provided with the circular ring part.
5. The vertical lift docking mechanism of claim 4, wherein: the driving piece is integrally of a sleeve-shaped structure, and the upper end of the sleeve-shaped structure is outwards protruded in the radial direction to form a circle of connecting flanges for fixing the lower end of the transmission rod.
6. The vertical lift docking mechanism of claim 5, wherein: the lower end face of the mounting block is provided with a lower groove for the connecting flange of the driving piece to retract and completely fill the whole body.
7. Diaphragm type gas table core error curve detects platform, its characterized in that: a vertical lift docking mechanism comprising any one of claims 1 to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320623835.7U CN219265453U (en) | 2023-03-27 | 2023-03-27 | Vertical lifting butt joint mechanism and diaphragm gas meter movement error curve detection table |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320623835.7U CN219265453U (en) | 2023-03-27 | 2023-03-27 | Vertical lifting butt joint mechanism and diaphragm gas meter movement error curve detection table |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219265453U true CN219265453U (en) | 2023-06-27 |
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