CN211477502U

CN211477502U - Adaptive assembly for calibrating pressure gauge

Info

Publication number: CN211477502U
Application number: CN201922421461.7U
Authority: CN
Inventors: 向友刚
Original assignee: Guangzhou Zhongce Testing Technology Co ltd
Current assignee: Guangzhou Zhongce Testing Technology Co ltd
Priority date: 2019-12-26
Filing date: 2019-12-26
Publication date: 2020-09-11
Anticipated expiration: 2029-12-26

Abstract

The utility model provides an adaptive component for pressure gauge calibration, which comprises a frame, a connector, a slide seat, a driving device and a control valve, wherein the control valve is connected on the slide seat, the slide seat is connected with the frame in a sliding way, the connector is fixed with the frame, the driving device is fixed with the frame, the driving device is used for driving the sliding seat to move so that the control valve is abutted against and communicated with the connector, the connector comprises a sleeve and an end cap, one end of the sleeve is provided with a clamping mechanism for fixing a pressure gauge to be tested, the other end of the sleeve is movably connected with the end cap, a top post is fixed in the end cap, the end part of the top post is inserted into the sleeve, the top post and the end cap are coaxially arranged, an air passage is arranged on the axial lead of the end cap and the top column, the end cap can drive the top column to move towards the clamping mechanism, and the top column is used for abutting against an interface of a pressure gauge to be measured and fixed in the sleeve and forming sealed communication; this adaptation subassembly of manometer check-up has rational in infrastructure, convenience simple to use and helps improving the advantage of manometer calibration detection efficiency.

Description

Adaptive assembly for calibrating pressure gauge

Technical Field

The utility model belongs to the technical field of the measurement, concretely relates to adaptation subassembly for manometer check-up.

Background

Pressure gauges (pressure gauge) are instruments that measure and indicate pressures above ambient pressure, which are very common, using elastic elements as sensors, and are used in almost all fields of industrial processes and scientific research. Especially in the industrial process control and technical measurement process, the elastic sensitive element of the mechanical pressure gauge has the characteristics of high mechanical strength, convenient production and the like, so the application range of the mechanical pressure gauge is wide; such as heat distribution network, oil and gas transmission, water and gas supply system, and vehicle maintenance shop. The main working principle of the pressure gauge is that the pressure is displayed by the rotation of the pointer through the elastic deformation of the sensitive elements (Bourdon tube, bellows and bellows) in the gauge and then the pressure deformation is transmitted to the pointer by the conversion mechanism of the movement in the gauge. The pressure gauge needs to be calibrated correspondingly before leaving factory, after maintenance or after being used for a period of time, so as to ensure the use precision of the pressure gauge; such as the indication error of a calibration pressure gauge detected by a measuring instrument. Measuring Instruments (Measuring Instruments) refer to main tools for performing verification or calibration, and generally refer to Measuring devices (such as taximeter verification devices, high-frequency microwave power meter calibration devices, and the like) which can be used alone or together with auxiliary equipment to directly or indirectly measure the quantity of a measured object, Instruments and meters (such as a heart/electroencephalograph, a pressure gauge, a flow meter, and the like), sensors (sensors equipped with various Measuring devices or Instruments and meters, various sensors for independent input/output, Measuring sensors or Measuring probes in a negative feedback closed loop control loop formed in various equipment, and the like), Measuring tools (such as Measuring blocks, weights, and the like), standard substances (such as carbon monoxide gas standard substances and ultraviolet light region transmittance standard filters) for unifying the quantity, calipers, and the like. According to the regulations of the national "metrological act" and the related regulations on metrological appliances, before use or during their valid verification period or calibration time interval, they must be "verified" or "checked" by a metrological agency with the relevant qualifications, according to the regulations of the corresponding metrological verification rules or calibration specifications. However, in the prior art, there is a certain inconvenience in calibrating the pressure gauge, and it is also not beneficial to improve the detection efficiency of the pressure gauge, for example, a pressure gauge calibration platform with application number 201821910933.4; its root cause mainly lies in, the manometer of waiting to calibrate often can include the bore of multiple not of uniform size, and then even the bore of manometer is the same also often can use the connecting thread of different grade type because of the user demand of difference, for example thick screw thread, thin screw thread etc. this also makes manometer calibration platform need be equipped with the switching mouth of multiple difference to the manometer of different bores of adaptation or screw thread.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a rational in infrastructure, simple to use conveniently help improving the adaptation subassembly that is used for the manometer check-up of manometer calibration detection efficiency.

In order to solve the technical problem, the utility model discloses the technical scheme who uses is:

an adapting assembly for calibrating a pressure gauge comprises a rack, a connector, a sliding seat, a driving device and a control valve, wherein the control valve is connected onto the sliding seat, the sliding seat is connected with the rack in a sliding manner, the connector is fixed with the rack, the driving device is used for driving the sliding seat to move so that the control valve is abutted against the connector and communicated with the connector, the connector comprises a sleeve and an end cap, the sleeve is tubular, one end of the sleeve is provided with a clamping mechanism for fixing the pressure gauge to be tested, the other end of the sleeve is movably connected with the end cap, a top post is fixed in the end cap, the end part of the top post is inserted into the sleeve, the top post and the end cap are coaxially arranged, an air passage is arranged on the axial lead of the end cap and the top post, and the end cap can drive the top post to move towards, the top column is used for abutting against an interface of a pressure gauge to be measured and fixed in the sleeve and forming sealed communication.

Preferably, the clamping mechanism comprises a plurality of clamping blocks and an adjusting screw rod, a plurality of sliding grooves are annularly arranged on the inner wall of the sleeve, the clamping blocks are respectively positioned in each sliding groove and can radially slide relative to the axis of the sleeve, the adjusting screw joint is annularly arranged along the outer wall of the sleeve and is screwed with the sleeve, and the end part of the adjusting screw rod is rotatably connected with the clamping blocks.

Preferably, the end part of the clamping block is provided with a cushion block, and the cushion block is fixedly connected with the clamping block.

Preferably, the end part of the top column is also provided with a sealing gasket, and the sealing gasket is fixedly connected with the top column.

Preferably, the rack comprises a base, two guide columns and a cross beam, the two guide columns are arranged at two ends of the base respectively, two ends of each guide column are fixedly connected with the base and the cross beam respectively, and the sliding seat slides with the guide columns and can slide along the axial direction of the guide columns to reciprocate.

Preferably, the beam is provided with a hollow hole, and the connector is mounted at the hollow hole.

Preferably, the driving device is any one of an air cylinder, a hydraulic cylinder and an electric telescopic rod.

Preferably, the control valve comprises a gasket, a valve block, a guide pipe, a reset spring and a connecting seat, wherein a through hole is formed in the connecting seat, the guide pipe penetrates through the through hole, one end of the guide pipe is fixedly connected with the valve block, the other end of the guide pipe penetrates through the gasket and is fixedly connected with the gasket, the reset spring is sleeved on the guide pipe and is located between the gasket and the connecting seat, the guide pipe can move in a reciprocating mode along the through hole, and a guide hole is formed in the side wall, close to the valve block, of the guide pipe.

Preferably, the cushion block, the sealing washer and the gasket are all made of polytetrafluoroethylene.

Preferably, the valve plate is further provided with a sealing ring, the sealing ring is sleeved on the guide pipe, and the sealing ring is located between the valve plate and the connecting seat.

The beneficial effects of the utility model are mainly embodied in that: the connecting head with the sleeve and the end cap is arranged, wherein the end cap is movably connected with the sleeve, a support pillar is arranged in the end cap, and a clamping mechanism is arranged on the sleeve; when the manometer that awaits measuring is fixed in the sleeve pipe through fixture, when removing the end cap and drive the fore-set and be close to fixture department, can make the tip of fore-set and be fixed in the sleeve pipe to await measuring the interface looks butt of manometer and form sealed intercommunication, and finally make the manometer that awaits measuring insert the pressure source and carry out corresponding detection calibration, thereby avoid inserting the source of impressing and detect the calibration through the mode of different bores or screw thread switching mouth, consequently, improved the convenience that the adaptation subassembly used and carried the dismouting efficiency of adaptation subassembly to the manometer that awaits measuring.

Drawings

The foregoing and other objects, features and advantages of the invention will be apparent from the following more particular description of preferred embodiments of the invention, as illustrated in the accompanying drawings. Like reference numerals refer to like parts throughout the drawings, and the drawings are not intended to be drawn to scale in actual dimensions, emphasis instead being placed upon illustrating the principles of the invention.

Fig. 1 is a schematic structural diagram of an adapter assembly for calibrating a pressure gauge according to the present invention;

fig. 2 is a schematic view of a use state of the adapter assembly for calibrating a pressure gauge according to the present invention;

fig. 3 is a schematic diagram of a connector structure of an adapter assembly for calibrating a pressure gauge according to the present invention;

fig. 4 is a schematic top view of a connector of an adapter assembly for calibrating a pressure gauge according to the present invention;

fig. 5 is an enlarged view of a in fig. 1.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the illustrated embodiments are not intended to limit the present invention, and in the present embodiments, it is understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and only describe the present invention, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention; in addition, in the present embodiment, if the connection or fixing manner between the components is not specifically described, the connection or fixing manner may be a bolt fixing manner, a welding fixing manner, a pin fixing manner, or the like, which is commonly used in the prior art, and therefore, detailed description thereof is omitted in this embodiment.

As shown in fig. 1 to 5, the present embodiment provides an adapter assembly for calibrating a pressure gauge, including a frame 1, a connector 2, a sliding seat 3, a driving device 4 and a control valve 5, wherein the control valve 5 is connected to the sliding seat 3, the sliding seat 3 is slidably connected to the frame 1, the connector 2 is fixed to the frame 1, the driving device 4 is fixed to the frame 1, and the driving device 4 is configured to drive the sliding seat 3 to move so that the control valve 5 abuts against and is communicated with the connector 2. The connector 2 comprises a sleeve 21 and an end cap 22, one end of the sleeve 21 is provided with a clamping mechanism for fixing a pressure gauge to be tested, the other end of the sleeve 21 is movably connected with the end cap 22, in the embodiment, the sleeve 21 is connected with the end cap 22 through threads, the outer wall of the sleeve 21 is provided with external threads, and the end cap 22 is provided with internal threads matched with the external threads; be provided with fore-set 23 in the end cap 22, the one end and the end cap 22 integrated into one piece of fore-set 23, the other end extends to the outside direction of end cap 22, and the tip of fore-set 23 inserts in sleeve pipe 21, fore-set 23 and the coaxial setting of end cap 22, and be equipped with air flue 24 on the axial lead of end cap 22 and fore-set 23, end cap 22 can drive fore-set 23 to fixture department motion and make fore-set 23 and the interface looks butt of the manometer that awaits measuring that is fixed in sleeve pipe 21 and form the sealed intercommunication. The clamping mechanism comprises a plurality of clamping blocks 25 and an adjusting screw rod 26, a plurality of sliding grooves 27 are annularly arranged on the inner wall of the sleeve 21, the clamping blocks 25 are respectively positioned in each sliding groove 27 and can radially slide relative to the axis of the sleeve 21, the adjusting screw joint is annularly arranged along the outer wall of the sleeve 21 and is screwed with the sleeve 21, and the end part of the adjusting screw rod 26 is rotatably connected with the clamping blocks 25. The joint of the pressure gauge to be checked is placed in the sleeve 21, then each adjusting screw 26 is respectively rotated, the adjusting screws 26 push the clamping blocks 25 to move towards the axis of the sleeve 21, and the pressure gauge to be checked can be clamped and fixed, namely, the clamping mechanism and the sleeve 21 are matched with each other to clamp and fix the clamping force gauges with different calibers; when the to-be-tested pressure gauge is fixed on the sleeve 21, the end cap 22 is rotated, and the end cap 22 can drive the top column 23 to be abutted with the to-be-tested pressure gauge so as to form sealed communication; finally, the pressure gauge to be tested is connected to the pressure source and corresponding detection and calibration are carried out, so that the pressure source is prevented from being connected to the pressing source in a mode of different calibers or threaded adapter ports and detection and calibration are carried out. The end part of the top column 23 is also provided with a sealing washer 29, the sealing washer and the top column 23 are fixed by gluing or clamping, the sealing washer 29 in the embodiment is a polytetrafluoroethylene washer, and polytetrafluoroethylene has self-lubricating property and wear resistance, so that abrasion caused by rotary extrusion of the sealing washer 29 and a pressure gauge to be measured can be reduced, namely, the maintenance workload of the adapter assembly is reduced.

In a preferred embodiment, a control valve 5, a sliding seat 3 and a driving device 4 are not used, but a rotary joint is directly connected to the lower end of an end cap 22, a pressure source is connected with the rotary joint, a valve is connected into a pipeline of the pressure source, and the rotary joint is arranged, so that the pressure source pipeline can be in sealing connection with the end cap 22, and the end cap 22 can freely rotate, so that a top column 23 in the end cap 22 is abutted to and in sealing connection with a pressure gauge to be measured; then the valve is opened again to lead the gas in the pressure source into the pressure gauge to be measured.

As shown in fig. 3, in a preferred embodiment, a cushion block 28 is disposed at an end of the clamping block 25, the cushion block 28 and the clamping block 25 are clamped or adhesively fixed, the cushion block 28 in this embodiment is made of teflon, and the cushion block 28 can avoid damage to a connector thread on a pressure gauge to be measured, so that the applicability of the adapting assembly is improved.

As shown in fig. 1-2, in a preferred embodiment, the frame 1 includes a base 11, two guide posts 12 and a cross beam 13, the two guide posts 12 are respectively located at two ends of the base 11, two ends of the guide posts 12 are respectively fixed with the base 11 and the cross beam 13 through bolts, and the sliding base 3 slides on the guide posts 12 and can reciprocate along the axial direction of the guide posts 12. The beam 13 is provided with a hollow hole 14, and the connector 2 is fixed on the hollow hole 14 of the beam 13. The driving device 4 is any one of an air cylinder, a hydraulic cylinder or an electric telescopic rod; the driving device in this embodiment is an air cylinder, the air cylinder is fixed to the base 11 through a bolt, a piston rod of the air cylinder is fixed to the sliding seat 3 through a support, and when the piston rod of the air cylinder extends upwards, the sliding seat 3 can be pushed to move upwards along the guide post 12, so that the control valve 5 on the sliding seat 3 is abutted to the connector 2 and is conducted.

As shown in fig. 5, in a preferred embodiment, the control valve 5 includes a spacer 51, a valve plate 52, a conduit 53, a return spring 54 and a connecting seat 55, the connecting seat 55 is provided with a through hole 56, the conduit 53 passes through the through hole 56, one end of the conduit 53 is fixed to the valve plate 52 by welding, the other end of the conduit 53 passes through the spacer 51 and is fixed to the spacer 51 by gluing or clamping, the return spring 54 is sleeved on the conduit 53, the return spring 54 is located between the spacer 51 and the connecting seat 55, the conduit 53 can reciprocate along the through hole 56, and a guide hole 57 is further provided on a side wall of the conduit 53 near the valve plate 52. The gasket 51 in this embodiment is made of polytetrafluoroethylene. The valve plate 52 is further provided with a sealing ring 58, the sealing ring 58 is sleeved on the conduit 53, and the sealing ring 58 is located between the valve plate 52 and the connecting seat 55. Along with the movement of the sliding seat 3, the gasket 51 is abutted to the lower end of the end cap 22, the gasket 51 moves downward, and the guide pipe 53 and the valve plate 52 connected to the gasket 51 are driven to move downward, so that the valve plate 52 is released from the sealing state with the connecting seat 55, and at the moment, the gas in the pressure source can enter the guide pipe 53 through the guide hole 57 on the side wall of the guide pipe 53 and enter the pressure gauge to be measured through the air passage 24 in the end cap 22. After the detection is completed, and the control valve 5 is separated from the end cap 22, the gasket 51 moves upward relative to the connecting seat 55 under the elastic force of the return spring 54, and drives the guide tube 53 and the valve plate 52 connected to the guide tube 53 to move upward, so that the valve plate 52 and the connecting seat 55 form a seal, that is, the gas in the pressure source is cut off from leaking, and the convenience in use of the adapting assembly is further improved.

The above is only the preferred embodiment of the present invention, and not the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings or the direct or indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. The utility model provides an adaptation subassembly for manometer check-up which characterized in that: comprises a frame, a connector, a sliding seat, a driving device and a control valve, wherein the control valve is connected on the sliding seat, the slide seat is connected with the frame in a sliding way, the connector is fixed with the frame, the driving device is fixed with the frame, and the driving device is used for driving the sliding seat to move so that the control valve is abutted against and communicated with the connecting head, the connector comprises a sleeve and an end cap, one end of the sleeve is provided with a clamping mechanism for fixing the pressure gauge to be measured, the other end of the sleeve is movably connected with the end cap, a support pillar is fixed in the end cap, the end part of the support pillar is inserted into the sleeve, the support pillar and the end cap are coaxially arranged, and the axial lead of the end cap and the top post is provided with an air passage, the end cap can drive the top post to move towards the clamping mechanism, the top column is used for abutting against an interface of a pressure gauge to be measured and fixed in the sleeve and forming sealed communication.

2. The adapter assembly for pressure gauge verification of claim 1, wherein: the clamping mechanism comprises a plurality of clamping blocks and an adjusting screw rod, a plurality of sliding grooves are annularly arranged on the inner wall of the sleeve, the clamping blocks are respectively positioned in each sliding groove and can radially slide along the axis of the sleeve, the adjusting screw joint is annularly arranged on the outer wall of the sleeve and is screwed with the sleeve, and the end part of the adjusting screw rod is rotatably connected with the clamping blocks.

3. The adapter assembly for pressure gauge verification of claim 2, wherein: the end part of the clamping block is provided with a cushion block, and the cushion block is fixedly connected with the clamping block.

4. The adapter assembly for pressure gauge verification of claim 1, wherein: and the end part of the top column is also provided with a sealing gasket which is fixedly connected with the top column.

5. The adapter assembly for pressure gauge verification of claim 1, wherein: the frame includes base, guide post and crossbeam, the guide post is provided with two and is located the both ends of base respectively, the both ends of guide post respectively with base and crossbeam fixed connection, the slide with the guide post slides and can slide the axial direction reciprocating motion of guide post.

6. The adapter assembly for pressure gauge verification of claim 5, wherein: the beam is provided with a hollow hole, and the connector is arranged at the hollow hole.

7. The adapter assembly for pressure gauge verification of claim 1, wherein: the driving device is any one of an air cylinder, a hydraulic cylinder or an electric telescopic rod.

8. The adapter assembly for pressure gauge verification of claim 1, wherein: the control valve comprises a gasket, a valve block, a guide pipe, a reset spring and a connecting seat, wherein a through hole is formed in the connecting seat, the guide pipe penetrates through the through hole, one end of the guide pipe is fixedly connected with the valve block, the other end of the guide pipe penetrates through the gasket and is fixedly connected with the gasket, the reset spring is sleeved on the guide pipe and located on the reset spring between the gasket and the connecting seat, the guide pipe can move in a reciprocating mode along the through hole, and the guide pipe is close to the side wall of the valve block.

9. The adapter assembly for pressure gauge verification of claim 8, wherein: the valve plate is further provided with a sealing ring, the sealing ring is fixed on the guide pipe, and the sealing ring is located between the valve plate and the connecting seat.