CN114278278A

CN114278278A - Protection device for oil field flowmeter

Info

Publication number: CN114278278A
Application number: CN202210034228.7A
Authority: CN
Inventors: 魏燕青
Original assignee: Individual
Current assignee: Shanghai Zhonghe Weisi Instrument Co ltd
Priority date: 2022-01-13
Filing date: 2022-01-13
Publication date: 2022-04-05
Anticipated expiration: 2042-01-13
Also published as: CN114278278B

Abstract

The invention relates to the field of flowmeter protection devices, in particular to a protection device for an oil field flowmeter. The invention aims to provide a flow meter protection device with a buffer protection function for an oil field. The technical scheme is as follows: the utility model provides a protection device for oil field flowmeter, is including base, shock attenuation buffer gear, bottom plate, square shell, chucking mechanism and the tight protection machanism of clamp, and the side of going up of base is equipped with shock attenuation buffer gear, and shock attenuation buffer gear's upside rigid coupling has the bottom plate, and the upper surface rigid coupling of bottom plate has the square shell, is equipped with two sets of chucking mechanisms altogether, and two portions about two sides are controlled in the side of bottom plate to two sets of chucking mechanisms rigid couplings respectively, and both ends are sealed to be cooperated about tight protection machanism and the flowmeter. The damping buffer mechanism and the clamping mechanism are arranged to prevent the flowmeter from being damaged in the use process, and the clamping protection mechanism is arranged to prevent the flowmeter from sliding relatively in the device in the use process to damage the flowmeter.

Description

Protection device for oil field flowmeter

Technical Field

The invention relates to the field of flowmeter protection devices, in particular to a protection device for an oil field flowmeter.

Background

In industrial sites, meters that measure fluid flow are collectively referred to as flow meters or flow meters. Is one of the most important instruments in industrial measurement. Along with the development of industry, the accuracy and the scope of flow measurement are required to be higher and higher, the flowmeter is used widely in the oil field industry, and the flow meter is a metering tool for the flow of crude oil when the crude oil is transported in an oil pipeline.

The flowmeter for the oil field is very sensitive to temperature and pressure in the use, simultaneously because the required precision of oil field flowmeter is higher, so the cost is very expensive, protection to the oil field flowmeter is very important, in the transportation of crude oil, because oil pipeline produces vibrations when the pressure in the oil pipeline changes, the flow timing is conducted to the vibrations that oil pipeline produced this moment, vibrations can influence the use precision of oil field flowmeter and lead to the flowmeter to damage even, current protection device does the vibrations buffering protection to the oil field flowmeter that can not be fine in the middle of the work, the leakproofness is relatively poor simultaneously.

Therefore, it is necessary to design a protection device for an oilfield flowmeter with a buffer protection function.

Disclosure of Invention

The invention aims to overcome the defects that the oil field flowmeter can be well subjected to vibration buffering protection and the sealing performance is poor, and provides an oil field flowmeter protection device with a buffering protection function.

The technical scheme is as follows: a protection device for an oil field flowmeter comprises a base, a damping and buffering mechanism, a bottom plate, a square shell, sliding covers, radiating fins, corrugated pipes, clamping mechanisms, a ventilation shell, a clamping and protecting mechanism and a sealing mechanism, wherein the damping and buffering mechanism is arranged on the upper side surface of the base, the bottom plate is fixedly connected to the upper side of the damping and buffering mechanism, the square shell is fixedly connected to the upper surface of the bottom plate, ventilation grids are embedded on the front side surface and the rear side surface of the square shell, the two sliding covers are respectively and slidably connected to the front part and the rear part of the upper end of the square shell, the radiating fins are respectively arranged on the upper parts of the two sliding covers, the two corrugated pipes are respectively communicated with the left side surface and the right side surface of the square shell, the two corrugated pipes are respectively and slidably connected with the square shell, two groups of clamping mechanisms are respectively arranged in the square shell, and the two groups of clamping mechanisms are respectively and fixedly connected to the left side and the right side surface of the upper side surface of the bottom plate, the flowmeter is installed in chucking mechanism, square through hole has respectively been seted up at two parts about the bottom plate, be equipped with two ventilative shells altogether, two ventilative shell rigid couplings are in two parts about the bottom plate downside, two ventilative shells cover respectively in the square through hole downside of bottom plate, inside the square shell was located to tight protection mechanism, tight protection mechanism and flowmeter both ends seal fit about tight protection mechanism, sealing mechanism is equipped with two altogether, two sealing mechanism symmetry respectively locate the inner of two bellows, sealing mechanism and flowmeter seal fit.

Furthermore, the shape of the ventilation shell is conical, and rectangular through holes are formed in four side faces of the ventilation shell.

Further, the damping and buffering mechanism comprises a first fixed shell, a spline shaft, a first sliding block, a first spring, a second fixed shell, a second sliding block, a second spring and an upper and lower buffering component, wherein the first fixed shell is fixedly connected to the lower side surface of the bottom plate, the spline shaft is fixedly connected to the front side and the rear side of the inner surface of the first fixed shell, the first sliding block is slidably connected to the spline shaft, the front end and the rear end of the upper side surface of the first sliding block are arranged in a circular arc manner, the two first springs are respectively sleeved on the front part and the rear part of the outer side surface of the spline shaft, the two ends of the two first springs are respectively fixedly connected with the first fixed shell of the first sliding block, the two second fixed shells are respectively fixedly connected to the front part and the rear part of the upper side surface of the bottom plate, the inner side surfaces of the second fixed shells are respectively slidably connected with the second sliding block, the lower end of the second sliding block is arranged in a circular arc manner, and the second sliding block respectively penetrates through the bottom plate, be equipped with two second springs altogether, inside the second set casing was located to two second springs, the both ends of second spring rigid coupling respectively in second set casing and second sliding block, both ends cooperation around two second sliding blocks respectively with first sliding block up side, first sliding block downside is located to upper and lower buffering subassembly.

Further, the upper and lower buffer components comprise a fixed sleeve, a first sliding rod, a third fixed shell, a first sliding plate, a third spring, a round head rod, a first fixed block and a fourth spring, the fixed sleeve is communicated with the base, the inner side surface of the fixed sleeve is connected with the first sliding rod in a sliding way, the lower part of the first sliding rod is provided with a circular groove, and is provided with four third fixed shells in total, the four third fixed shells are fixedly connected with the upper side surface of the base at equal intervals along the circumferential direction of the fixed sleeve, the inner side surfaces of the four third fixed shells are respectively connected with the first sliding plate in a sliding way, the inside of the four third fixed shells are respectively provided with the third spring, the two ends of the third spring are respectively fixedly connected with the third fixed shell and the first sliding plate, the inner end of the first sliding plate is fixedly connected with the round head rod, the round head rod is matched with the circular groove of the first sliding rod, the first fixed block is fixedly connected with the upper end of the first sliding rod, the first fixed block is fixedly connected with the lower surface of the first sliding block, the fourth spring is sleeved on the outer side surface of the first sliding rod, and two ends of the fourth spring are fixedly connected to the first fixing block and the fixing sleeve respectively.

Furthermore, the clamping mechanism comprises support bars, a chute shell, arc-shaped fixed plates, tension springs, second sliding rods, fifth springs and an extrusion assembly, wherein the two support bars are arranged, the two support bars are fixedly connected to the upper side surface of the bottom plate respectively, the chute shell is fixedly connected to the upper ends of the two support bars, the two arc-shaped fixed plates are arranged, the two arc-shaped fixed plates are slidably connected to the front and the rear parts of the chute shell respectively, the tension springs are arranged between the two arc-shaped fixed plates, the two ends of each tension spring are fixedly connected to the two arc-shaped fixed plates respectively, the two second sliding rods are arranged, the two second sliding rods are slidably connected to the front and the rear ends of the chute shell respectively, the inner ends of the two second sliding rods are fixedly connected to the adjacent arc-shaped fixed plates respectively, the two fifth springs are arranged, the two fifth springs are sleeved outside the second sliding rods respectively, and the two ends of the fifth springs are fixedly connected to the adjacent arc-shaped fixed plates and the chute shell respectively, two groups of extrusion components are arranged in total and are respectively and fixedly connected with the lower side surfaces of the two sliding covers.

Further, the extrusion subassembly is including the second fixed block, the slip shell, the sixth spring, first mount, the apparatus further comprises a rotating shaft, torsional spring and arc strip, be equipped with two second fixed blocks altogether, two second fixed blocks rigid coupling respectively in two sliding closure downside, sliding connection has the slip shell respectively in the lower part of second fixed block, be connected with the sixth spring between second fixed block and the slip shell, the lower part of slip shell is equipped with first mount, slip shell and first mount rotate through the pivot and connect, two parts are respectively around being equipped with the torsional spring about the lateral surface of pivot, the both ends of torsional spring rigid coupling respectively in slip shell and first mount, the downside rigid coupling of first mount has the arc strip.

Furthermore, the clamping protection mechanism comprises a first support plate, a second support plate, a screw rod, a first gear, a servo motor, a second gear, a support frame, a threaded sleeve and a second sliding plate, wherein two first support plates are arranged, the two first support plates are fixedly connected to the left part and the right part of the upper side surface of the bottom plate, two second support plates are arranged, the two second support plates are fixedly connected to the front part and the rear part of the upper side surface of the bottom plate, sliding grooves are formed in the left part and the right part of the lower side of the two second support plates, the screw rod is rotatably connected between the two first support plates, the threads of the left part and the right part of the screw rod are opposite, the first gear is fixedly connected to the middle part of the outer side surface of the screw rod, the servo motor is fixedly connected to the front part of the upper side surface of the bottom plate, the second gear is fixedly connected to an output shaft of the servo motor, the first gear is meshed with the second gear, the left side and the right side of the inner ends of the two corrugated pipes are respectively fixedly connected with the support frames, and the threaded sleeve is fixedly connected between the lower parts of the two support frames, the threaded sleeve is in threaded connection with the lead screw and is provided with four second sliding plates, the four second sliding plates are fixedly connected to the outer side face of the lower portion of the support frame respectively, and the four second sliding plates are connected in the sliding grooves of the second support plate respectively in a sliding mode.

Furthermore, the sealing mechanism comprises a second fixing frame, a third sliding block, a seventh spring, an electric hydraulic push rod, a first supporting block, a fourth sliding block, a T-shaped plate, a fifth sliding block, a first arc-shaped plate, a third fixing block, a second arc-shaped plate and a conical supporting rod, wherein two second fixing frames are arranged in total, the two second fixing frames are respectively fixedly connected with the front part and the rear part of the inner side surface of the square shell, two third sliding blocks are arranged in total, the two third sliding blocks are respectively and slidably connected with the outer parts of the inner side surfaces of the two second fixing frames, two seventh springs are arranged in total, two ends of each seventh spring are respectively connected with the adjacent second fixing frame and the adjacent third sliding block, two electric hydraulic push rods are arranged in total, the left part and the right part of the lower side surfaces of the two electric hydraulic push rods are respectively and fixedly connected with the first supporting blocks, the two first supporting blocks are fixedly connected with the upper parts of the inner side surfaces of the adjacent second supporting plates, and the telescopic rods of the two electric hydraulic push rods are respectively and fixedly connected with the fourth sliding blocks, two fourth sliding blocks sliding connection respectively in adjacent second mount medial surface, the left surface difference rigid coupling of two fourth sliding blocks has the T shaped plate, the medial surface difference sliding connection of two second mounts has the fifth sliding block, the T shape spout has been seted up to the right flank branch table of fifth sliding block, T shaped plate sliding connection is in the T shape spout of fifth sliding block, the medial surface difference rigid coupling of two fifth sliding blocks has first arc, be equipped with a plurality of third fixed block altogether, equidistant rigid coupling in the medial surface of first arc is distinguished to a plurality of third fixed block, the inner rigid coupling of a plurality of third fixed block has the second arc, the equidistant rigid coupling of the left surface of second arc has a plurality of toper branch, toper branch and the sealed cooperation of flowmeter ring flange round hole.

Further, the watch comprises a watch head protection mechanism, the watch head protection mechanism comprises a first protection shell, a second protection shell, second supporting blocks, a circular plate, an eighth spring, a circular ring, a ninth spring and a sponge strip, the lower ends of the first protection shell and the second protection shell are fixedly connected with the second supporting blocks respectively, the two second supporting blocks are fixedly connected to the upper side surfaces of the two sliding covers respectively, a square through hole is formed in the front side of the second protection shell, a glass plate is installed on the square through hole of the second protection shell, the first protection shell is in sealing fit with the second protection shell, the circular plate is connected to the inside of the first protection shell in a sliding mode, the eighth spring is arranged between the circular plate and the first protection shell, the two ends of the eighth spring are fixedly connected to the first protection shell and the circular plate respectively, the circular ring is connected to the inside of the second protection shell in a sliding mode, the ninth spring is arranged between the second protection shell and the circular ring, the two ends of the ninth spring are fixedly connected to the second protection shell and the circular ring respectively, the inner side surfaces of the first protective shell and the second protective shell are fixedly connected with sponge strips respectively.

Further, first protective housing and second protective housing mutually support and form airtight protective housing, and the top of airtight protective housing is the inclined plane setting and the inclined plane is smooth.

The invention has the following advantages: the invention dissipates heat inside the square shell by arranging the ventilation shell, dissipates heat of a connecting rod of the flowmeter by a heat dissipation sheet in the use process, avoids excessive heat from reducing the service life of electronic components in a meter head of the flowmeter, fixes the flowmeter between the arc-shaped fixed plate and the arc-shaped strip by arranging the clamping mechanism under the action of the tensile force of the tension spring and the elastic forces of the fifth spring and the sixth spring, protects the flowmeter from being damaged in the use process, prevents the flowmeter from generating relative sliding in the device and damaging the flowmeter by arranging the clamping protection mechanism and respectively clamping and sealing flanges at two ends of the flowmeter by arranging the clamping protection mechanism, drives the conical support rod to approach the corrugated pipe at the same side by arranging the sealing mechanism, and the conical support rod is in sealing fit with a through hole of the flange of the flowmeter, avoid crude oil to spill over in the through-hole of flowmeter ring flange, through setting up shock attenuation buffer gear, buffer protection is carried out to the inside flowmeter of this device under the spring action through first spring and fourth spring, avoid the flowmeter to receive the damage, through setting up gauge outfit protection mechanism, pass through the bolt sealing of screwing with first protective housing and second protective housing through operating personnel, avoid water infiltration to cause the damage to it in the flowmeter gauge outfit, through the eighth spring, ninth spring and sponge strip play the guard action to the gauge outfit of flowmeter, avoid vibrations to cause the damage to the flowmeter.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a schematic sectional perspective view of the present invention.

Fig. 3 is a schematic perspective view of the open state of the present invention.

Fig. 4 is a schematic perspective view of the shock absorbing and buffering mechanism of the present invention.

Fig. 5 is a schematic sectional perspective view of the shock absorbing and buffering mechanism of the present invention.

Fig. 6 is a schematic sectional perspective view of a second stationary housing according to the present invention.

Fig. 7 is a schematic sectional perspective view of a third stationary housing according to the present invention.

Fig. 8 is a schematic perspective view of the chucking mechanism of the present invention.

Fig. 9 is a partial perspective view of the chucking mechanism of the present invention.

Fig. 10 is a schematic cross-sectional perspective view of the hold-down assembly of the present invention.

Fig. 11 is a schematic perspective view of the clamping protection mechanism of the present invention.

Fig. 12 is a partial perspective view of the clamping protection mechanism of the present invention.

Fig. 13 is a schematic perspective view of the sealing mechanism of the present invention.

Fig. 14 is a partial perspective view of the sealing mechanism of the present invention.

Fig. 15 is a schematic cross-sectional three-dimensional structure view of a second fixing frame according to the present invention.

Fig. 16 is a schematic sectional perspective view of the gauge outfit protection mechanism according to the present invention.

Number designation in the figures: 1-base, 2-bottom plate, 3-square shell, 4-sliding cover, 5-heat sink, 6-corrugated pipe, 7-flowmeter, 8-permeable shell, 901-first fixed shell, 902-spline shaft, 903-first sliding block, 904-first spring, 905-second fixed shell, 906-second sliding block, 907-second spring, 908-fixed sleeve, 909-first sliding rod, 910-third fixed shell, 911-first sliding plate, 912-third spring, 913-round rod, 914-first fixed block, 915-fourth spring, 1001-support bar, 1002-chute shell, 1003-arc fixed plate, 1004-tension spring, 1005-second sliding rod, 1006-fifth spring, 1007-second fixed block, 1008-a sliding shell, 1009-a sixth spring, 1010-a first fixing frame, 1011-a rotating shaft, 1012-a torsion spring, 1013-an arc-shaped strip, 1101-a first supporting plate, 1102-a second supporting plate, 1103-a screw rod, 1104-a first gear, 1105-a servo motor, 1106-a second gear, 1107-a supporting frame, 1108-a thread bush, 1109-a second sliding plate, 1201-a second fixing frame, 1202-a third sliding block, 1203-a seventh spring, 1204-an electric hydraulic push rod, 1205-a first supporting block, 1206-a fourth sliding block, 1207-a T-shaped plate, 1208-a fifth sliding block, 1209-a first arc-shaped plate, 1210-a third fixing block, 1211-a second arc-shaped plate, 1212-a conical supporting rod, 1301-a first protection shell, 1302-a second protection shell, 1303-second support block, 1304-circular plate, 1305-eighth spring, 1306-circular ring, 1307-ninth spring, 1308-sponge strip.

Detailed Description

The following further describes the technical solution with reference to specific embodiments, and it should be noted that: the words upper, lower, left, right, and the like used herein to indicate orientation are merely for the location of the illustrated structure in the corresponding figures. The serial numbers of the parts are themselves numbered herein, for example: first, second, etc. are used solely to distinguish one from another as to objects described herein, and do not have any sequential or technical meaning. The application states that: the connection and coupling, unless otherwise indicated, include both direct and indirect connections (couplings).

Example 1

A protection device for an oil field flowmeter is disclosed, as shown in figures 1-15, and comprises a base 1, a damping buffer mechanism, a bottom plate 2, a square shell 3, a sliding cover 4, radiating fins 5, corrugated pipes 6, a clamping mechanism, a ventilation shell 8, a clamping protection mechanism and a sealing mechanism, wherein the damping buffer mechanism for protecting the flowmeter 7 is arranged on the upper side surface of the base 1, the bottom plate 2 is fixedly connected to the upper side of the damping buffer mechanism, the square shell 3 is fixedly connected to the upper surface of the bottom plate 2, ventilation grids are embedded on the front and rear side surfaces of the square shell 3, two sliding covers 4 are arranged, the two sliding covers 4 are slidably connected to the front and rear parts of the upper end of the square shell 3, the two sliding covers 4 are in sealing fit with the outer side surface of a connecting rod of the flowmeter 7 to prevent a large amount of dust from entering the square shell 3, the radiating fins 5 are respectively arranged on the upper parts of the two sliding covers 4, and the two corrugated pipes 6 are arranged, the two corrugated pipes 6 are respectively communicated with the left side surface and the right side surface of the square shell 3, the two corrugated pipes 6 are connected with the square shell 3 in a sliding way, two groups of clamping mechanisms for placing the flowmeter 7 are arranged, the two groups of clamping mechanisms are arranged in the square shell 3 and are respectively fixedly connected with the left side surface and the right side surface of the bottom plate 2, the flowmeter 7 is arranged on the clamping mechanisms, the left side surface and the right side surface of the bottom plate 2 are respectively provided with a square through hole, two breathable shells 8 are arranged, the two breathable shells 8 are fixedly connected with the left side surface and the right side surface of the bottom plate 2, the two breathable shells 8 respectively cover the lower side surface of the square through hole of the bottom plate 2, the breathable shells 8 are conical, the four side surfaces are respectively provided with a plurality of rectangular through holes, the clamping protection mechanism is arranged in the square shell 3, the clamping protection mechanism is in sealing fit with the left end and the right end of the flowmeter 7, and two sealing mechanisms for connecting the corrugated pipes 6 and the flowmeter 7 are arranged, two sealing mechanism symmetry respectively locate the inner of two bellows 6, sealing mechanism and flowmeter 7 seal fit, through setting up ventilative shell 8 and dispel the heat to the inside of square shell 3, dispel the heat through fin 5 to the connecting rod of flowmeter 7 in the use, avoid too much heat to reduce flowmeter 7's gauge outfit in electronic components's life.

When the device is used, the base 1 is fixedly connected to the ground through screws, the sliding covers 4 on the front side and the rear side are opened through sliding of an operator, the flowmeter 7 is placed in the square shell 3 from the device, the flowmeter 7 is clamped through the clamping mechanism, the operator starts the clamping protection mechanism, the clamping protection mechanism clamps the flanges on the left part and the right part of the flowmeter 7, the clamping protection mechanism clamps the flowmeter 7, the operator starts the sealing mechanism, the sealing mechanism is matched with the clamping protection mechanism to hermetically connect the flanges on the left part and the right part of the flowmeter 7 with the adjacent corrugated pipes 6, the operator resets the two sliding covers 4, screws the two sliding covers 4 through bolts to be hermetically matched, rainwater and a large amount of dust are prevented from entering the device to damage the device, and the operator communicates the corrugated pipes 6 on the left part and the right part of the device with an oil pipeline, the crude oil then flows through an oil pipeline to the left bellows 6, the crude oil flows through a flow meter 7 to the right bellows 6, and is transmitted to the right side through an oil pipeline, the flow of the crude oil is calculated through the flowmeter 7 at the moment, the flowmeter 7 vibrates due to the change of the pressure in the oil pipeline in the transportation process of the crude oil, the flowmeter 7 is subjected to damping and buffering protection through the damping and buffering mechanism at the moment, the damage of the flowmeter 7 in the use process is avoided, since the flowmeter 7 is very sensitive to temperature, the inside of the rectangular housing 3 is radiated by the ventilation grill and the ventilation housing 8, a large number of electronic components exist in the meter head of the flowmeter 7, the connecting rod of the flowmeter 7 is cooled through the cooling fins 5 in the using process, heat is prevented from entering the meter head of the flowmeter 7 through the connecting rod, and the service life of the electronic components in the meter head of the flowmeter 7 is shortened.

Example 2

In addition to embodiment 1, as shown in fig. 4 to 7, the shock absorbing and cushioning mechanism includes a first fixed housing 901, a spline shaft 902, a first sliding block 903, a first spring 904, a second fixed housing 905, a second sliding block 906, a second spring 907, a fixed housing 908, a first sliding rod 909, a third fixed housing 910, a first sliding plate 911, a third spring 912, a round rod 913, a first fixed block 914, and a fourth spring 915, the first fixed housing 901 is fixed to the lower side surface of the base plate 2, the spline shaft 902 is fixed to the front and rear sides of the inner surface of the first fixed housing 901, the first sliding block 903 is slidably connected to the spline shaft 902, the spline shaft 902 is used to slide stably when the first sliding block 903 slides back and forth, the front and rear ends of the upper side surface of the first sliding block 903 are disposed in an arc shape, two first springs 904 are disposed in total, the two first springs 904 are respectively fitted around the front and rear parts of the outer side surface 902 of the spline shaft, two ends of two first springs 904 are respectively fixedly connected with the first fixed shell 901 of the first sliding block 903, and two second fixed shells 905 are arranged, the two second fixed shells 905 are fixedly connected with the front and back parts of the upper side surface of the bottom plate 2, the inner side surface of the second fixed shell 905 is respectively and slidably connected with a second sliding block 906, the lower end of the second sliding block 906 is arranged in a circular arc shape, the second sliding block 906 passes through the bottom plate 2 and is provided with two second springs 907, the two second springs 907 are arranged in the second fixed shell 905, two ends of the second springs 907 are respectively and fixedly connected with the second fixed shell 905 and the second sliding block 906, the two second sliding blocks 906 are respectively matched with the front and back ends of the upper side surface of the first sliding block 903, at the moment, the second sliding block 906 avoids small vibration to enable the device to shake back and forth, the first spring 904 is extruded by the first sliding block 903 to buffer the device, the fixed sleeves 908 are communicated with the base 1, the inner side of the fixed sleeve 908 is slidably connected with a first sliding rod 909, the lower part of the first sliding rod 909 is provided with a circular groove, and totally four third fixed cases 910 are arranged, the four third fixed cases 910 are fixedly connected to the upper side of the base 1 along the circumferential direction of the fixed sleeve 908 at equal intervals, the inner side of the third fixed case 910 is respectively slidably connected with a first sliding plate 911, the four third fixed cases 910 are respectively internally provided with a third spring 912, two ends of the third spring 912 are respectively fixedly connected to the third fixed case 910 and the first sliding plate 911, the inner end of the first sliding plate 911 is fixedly connected with a round head rod 913, the round head rod 909 is matched with the circular groove of the first sliding rod, the round head rod 913 fixes the first sliding rod 909 to avoid the device from shaking up and down under small vibration, the first fixed block 914 is fixedly connected to the upper end of the first sliding rod 909, the first fixed block 914 is fixedly connected to the lower surface of the first sliding block 903, and the fourth spring is sleeved on the outer side of the first sliding rod 909, the both ends of fourth spring 915 rigid coupling respectively in first fixed block 914 and fixed cover 908, extrude fourth spring 915 through first fixed block 914, cushion this device, cushion protection to the inside flowmeter 7 of this device under the spring action through first spring 904 and fourth spring 915, avoid flowmeter 7 to receive the damage.

As shown in fig. 8-10, the clamping mechanism includes a support bar 1001, a chute housing 1002, an arc-shaped fixing plate 1003, a tension spring 1004, a second sliding bar 1005, a fifth spring 1006, a second fixing block 1007, a sliding housing 1008, a sixth spring 1009, a first fixing frame 1010, a rotating shaft 1011, a torsion spring 1012 and an arc-shaped bar 1013, wherein two support bars 1001 are provided, the two support bars 1001 are respectively and fixedly connected to the upper side surface of the base plate 2, the chute housing 1002 is fixedly connected to the upper ends of the two support bars 1001, two arc-shaped fixing plates 1003 are provided, the two arc-shaped fixing plates 1003 are respectively and slidably connected to the front and rear portions of the chute housing 1002, the tension spring 1004 is provided between the two arc-shaped fixing plates 1003, the two ends of the tension spring 1004 are respectively and fixedly connected to the two arc-shaped fixing plates 1003, two second sliding bars 1005 are provided, the two second sliding bars 1005 are respectively and slidably connected to the front and rear ends of the chute housing 1002, the inner ends of the two second sliding bars 1005 are respectively and fixedly connected to the adjacent arc-shaped fixing plates 1003, two fifth springs 1006 are arranged, the two fifth springs 1006 are respectively sleeved outside the second sliding rod 1005 in a sleeved manner, two ends of each fifth spring 1006 are respectively fixedly connected to the adjacent arc-shaped fixing plate 1003 and the sliding chute shell 1002, two second fixing blocks 1007 are arranged, the two second fixing blocks 1007 are respectively fixedly connected to the lower sides of the two sliding covers 4, the lower parts of the second fixing blocks 1007 are respectively and slidably connected with the sliding shell 1008, a sixth spring is connected between the second fixing blocks 1007 and the sliding shell 1008, the lower part of the sliding shell 1008 is provided with a first fixing frame 1010, the sliding shell 1008 is rotatably connected with the first fixing frame 1010 through a rotating shaft 1011, the left part and the right part of the outer side surface of the rotating shaft 1011 are respectively wound with a torsion spring 1012, two ends of the torsion spring 1012 are respectively fixedly connected to the sliding shell 1008 and the first fixing frame 1010, under the torsion of the torsion spring 1012, the arc-shaped strip 1013 is reset, the collision between the arc-shaped strip 1013 and the inner side surface of the square shell 3 is avoided, the arc-shaped strip 1013 is fixedly connected to the lower side surface of the first fixing frame 1010, under the action of the tension spring 1012 and the elastic forces of the fifth spring 1006 and the sixth spring 1009, the flowmeter 7 is fixed between the arc fixing plate 1003 and the arc strip 1013, so that the flowmeter 7 is protected, and the flowmeter 7 is prevented from being damaged in the using process.

As shown in fig. 11 and 12, the clamping protection mechanism includes a first support plate 1101, a second support plate 1102, a lead screw 1103, a first gear 1104, a servo motor 1105, a second gear 1106, a support frame 1107, a thread bushing 1108 and a second sliding plate 1109, wherein two first support plates 1101 are provided, the two first support plates 1101 are fixedly connected to the left and right parts of the upper side of the bottom plate 2, two second support plates 1102 are provided, the two second support plates 1102 are fixedly connected to the front and rear parts of the upper side of the bottom plate 2, the left and right parts of the lower sides of the two second support plates 1102 are provided with sliding slots, the lead screw 1103 is rotatably connected between the two first support plates 1101, the threads of the left and right parts of the lead screw 1103 are opposite, the first gear 1104 is fixedly connected to the middle part of the outer side of the lead screw 1103, the servo motor 1105 is fixedly connected to the front part of the upper side of the bottom plate 2, the output shaft of the servo motor 1105 is fixedly connected to the second gear 1106, the first gear 1104 is engaged with the second gear 1106, the inner left and right sides of two bellows 6 is the rigid coupling respectively has the support frame 1107, the rigid coupling has thread bush 1108 between the lower part of two support frames 1107, thread bush 1108 and lead screw 1103 threaded connection, be equipped with four second sliding plates 1109 altogether, four second sliding plates 1109 rigid coupling in support frame 1107 lower part lateral surface respectively, four second sliding plates 1109 are sliding connection respectively in the spout of second backup pad 1102, the ring flange at two bellows 6 press from both sides tight sealed flowmeter 7 both ends respectively, avoid flowmeter 7 in the use inside relative slip that produces of this device, cause the damage to flowmeter 7.

As shown in fig. 13-15, the sealing mechanism includes a second fixing frame 1201, a third sliding block 1202, a seventh spring 1203, an electro-hydraulic push rod 1204, a first supporting block 1205, a fourth sliding block 1206, a T-shaped plate 1207, a fifth sliding block 1208, a first arc-shaped plate 1209, a third fixing block 1210, a second arc-shaped plate 1211 and a tapered strut 1212, wherein two second fixing frames 1201 are provided, the two second fixing frames 1201 are respectively fixed on the front and rear portions of the inner side of the square casing 3, two third sliding blocks 1202 are provided, the two third sliding blocks 1202 are respectively connected outside the inner side of the two second fixing frames 1201 in a sliding manner, two seventh springs 1203 are provided, two ends of the two seventh springs 1203 are respectively connected to the adjacent second fixing frame 1201 and third sliding block 1202, two electro-hydraulic push rods 1204 are provided, the left and right portions of the lower side of the two electro-hydraulic push rods 1204 are respectively fixed with the first supporting block 1205, two first supporting blocks 1205 are fixedly connected to the upper parts of the inner sides of the adjacent second supporting plates 1102, the telescopic rods of the two electric hydraulic push rods 1204 are respectively fixedly connected with a fourth sliding block 1206, the two fourth sliding blocks 1206 are respectively and slidably connected to the inner sides of the adjacent second fixing frames 1201, the left sides of the two fourth sliding blocks 1206 are respectively and fixedly connected with a T-shaped plate 1207, the inner sides of the two second fixing frames 1201 are respectively and slidably connected with a fifth sliding block 1208, the right side of the fifth sliding block 1208 is respectively provided with a T-shaped sliding groove, the T-shaped plate 1207 is slidably connected in the T-shaped sliding groove of the fifth sliding block 1208, the T-shaped plate 1207 is reset by the pulling force of the fifth sliding block 1208, the inner sides of the two fifth sliding blocks 1208 are respectively and fixedly connected with a first arc-shaped plate 1209, a plurality of third fixing blocks 1210 are arranged, the plurality of third fixing blocks 1210 are respectively and fixedly connected to the inner sides of the first arc-shaped plate 1209 at equal intervals, the inner ends of the plurality of the third fixing blocks 1210 are fixedly connected with a second arc-shaped plate 1211, the left side of second arc 1211 is equidistant the rigid coupling has a plurality of toper branch 1212, and toper branch 1212 and flowmeter 7 ring flange round hole seal fit avoids crude oil to spill over in the flowmeter 7 ring flange round hole, and second arc 1211 drives toper branch 1212 and is close to the bellows 6 of homonymy, and toper branch 1212 and flowmeter 7 ring flange's through-hole seal fit avoids crude oil to spill over in the through-hole of flowmeter 7 ring flange.

When the device is used, an operator puts the flowmeter 7 into the square shell 3, then the operator slides the first arc plate 1209 outwards, at the same time, the first arc plate 1209 drives the third fixed block 1210, the second arc plate 1211 and the tapered support rod 1212 outwards, the first arc plate 1209 drives the fifth sliding block 1208 to slide outwards, the fifth sliding block 1208 extrudes the third sliding block 1202 to slide outwards, the seventh spring 1203 is compressed, when the flowmeter 7 contacts the arc fixed plate 1003, the outer side surface of the flowmeter 7 extrudes the arc fixed plate 1003 to move outwards, the tension spring 1004 stretches at the same time, the arc fixed plate 1003 drives the second sliding rod 1005 to move outwards, then the operator resets the two sliding covers 4, then the sliding covers 4 drive the second fixed block 1007 on the same side to approach, then the second fixed block 1007 drives the sliding shell 1008 to approach, when the arc strip 1013 contacts the outer side surface of the flowmeter 7, arc strip 1013 rotates along pivot 1011, torsional spring 1012 screws, arc strip 1013 extrudees flowmeter 7 lateral surface, this moment under the effect of extrusion force, slip shell 1008 upwards slides, sixth spring 1009 compresses, this moment under the effect of the pulling force of extension spring 1004 and the effect of fifth spring 1006 and sixth spring 1009 elasticity, be fixed in flowmeter 7 between arc fixed plate 1003 and arc strip 1013, protect flowmeter 7, avoid flowmeter 7 to receive the damage in the use, after two sliding closure 4 reset, the lateral surface seal fit of the connecting rod of two sliding closure 4 and flowmeter 7, avoid inside a large amount of dusts enter into square shell 3, cause the influence to this device.

The operating personnel starts servo motor 1105, the output shaft of servo motor 1105 drives second gear 1106 clockwise, second gear 1106 drives first gear 1104 anticlockwise rotation, first gear 1104 drives lead screw 1103 anticlockwise rotation, lead screw 1103 drives two thread bushings 1108 and is close to mutually, thread bushings 1108 drive the support frame 1107 that is connected and is close to the removal mutually afterwards, support frame 1107 slides between two second backup pads 1102 through second sliding plate 1109, the support frame 1107 drives bellows 6 that is connected and is close to mutually this moment, the ring flange at two bellows 6 clamp tight sealed flowmeter 7 both ends respectively this moment, avoid flowmeter 7 in the use inside relative slip that produces of this device, cause the damage to flowmeter 7, operating personnel closes servo motor 1105 afterwards.

When the two corrugated pipes 6 seal the flanges at the left and right ends of the flowmeter 7, then an operator starts the electric hydraulic push rods 1204, the electric hydraulic push rods 1204 at the left and right sides drive the fourth sliding blocks 1206 at the left and right sides to slide away from each other, at this time, the fourth sliding blocks 1206 at the two sides push the fifth sliding blocks 1208 to move away from each other, the fifth sliding blocks 1208 drive the connected first arc-shaped plates 1209 to approach the corrugated pipes 6 at the same side, at this time, the first arc-shaped plates 1209 drive the second arc-shaped plates 1211 to approach the corrugated pipes 6 at the same side through the third fixing blocks 1210, the second arc-shaped plates 1211 drives the conical supporting rods 1212 to approach the corrugated pipes 6 at the same side, the conical supporting rods 1212 are in sealing fit with the through holes of the flanges of the flowmeter 7, so as to prevent crude oil from overflowing from the through holes of the flanges of the flowmeter 7, under the thrust action of the electric hydraulic push rod 1204, the flange of the flowmeter 7 is matched and sealed with the inner end of the corrugated pipe 6.

When the pressure of crude oil in an oil pipeline is greatly changed, the oil pipeline can generate large vibration, the damage of the oil pipeline vibration to the flowmeter 7 is relieved under the action of the corrugated pipe 6, when the flowmeter 7 generates slight vibration due to the crude oil, the influence on the flowmeter 7 is not large, at the moment, the first sliding block 903 and the first sliding rod 909 are respectively enabled to be stationary under the action of the second sliding block 906 and the round-head rod 913, when the flowmeter 7 generates large front-back vibration, the bottom plate 2 drives the first fixed shell 901 to slide back and forth, then the first sliding block 903 extrudes the second sliding blocks 906 on the front side and the back side, the second sliding block 906 slides upwards along the second fixed shell 905, the second spring 907 compresses, when the first fixed shell 901 slides back and forth, the first spring 904 is continuously extruded, the vibration is buffered for the flowmeter 7 through the first spring 904, and the flowmeter 7 is prevented from being damaged, when the vibration is finished, the first fixed case 901 is restored by the elastic force of the first spring 904, and then the second sliding block 906 is restored by the elastic force of the second spring 907.

When the flowmeter 7 generates large up-and-down vibration, the bottom plate 2 drives the first sliding block 903 to move downwards, the first sliding block 903 drives the first fixing block 914 to move downwards, the first fixing block 914 drives the first sliding rod 909 to enable the first sliding rod 909 to slide downwards on the inner side surface of the fixing sleeve 908, the round head rod 913 slides along the third fixing shell 910 under the extrusion force of the first sliding rod 909, the round head rod 913 drives the first sliding plate 911 to slide, the third spring 912 is compressed, the round head rod 913 is out of fit with the first sliding rod 909, the fourth spring 915 is compressed during the downward sliding process of the first sliding rod 909, when the first sliding rod 909 moves upwards, the fourth spring 915 is stretched, the flowmeter 7 is damped and buffered under the action of the fourth spring 915, so that the damage to the flowmeter 7 caused by the vibration is avoided, and after the vibration is finished, the first sliding rod 909 is reset under the elastic force of the fourth spring 915, at this time, the round rod 913 is re-engaged with the first sliding rod 909 by the elastic force of the third spring 912, so that the flowmeter 7 inside the apparatus is protected by the elastic force of the first spring 904 and the fourth spring 915.

When the flowmeter 7 needs to be replaced, the bolt at the joint of the two sliding covers 4 is screwed down by an operator, the two sliding covers 4 are far away from and slide by the operator, at the moment, the arc-shaped strip 1013 loses contact with the outer side surface of the flowmeter 7, the sliding shell 1008 is reset under the elastic action of the sixth spring 1009, the arc-shaped strip 1013 is reset under the torsion action of the torsion spring 1012, collision between the arc-shaped strip 1013 and the inner side surface of the square shell 3 is avoided, then the operator starts the electric hydraulic push rod 1204 to restore the initial position, then the operator starts the servo motor 1105 to restore the initial position, then the operator takes away the flowmeter 7 to be replaced, the arc-shaped fixing plate 1003 is reset under the action of the tension spring 1004 and the fifth spring 1006, after a new flowmeter 7 is replaced, the device is reset by repeating the operation.

Example 3

Based on embodiment 2, as shown in fig. 16, the device further includes a meter head protection mechanism, the meter head protection mechanism includes a first protection shell 1301, a second protection shell 1302, second supporting blocks 1303, a circular plate 1304, an eighth spring 1305, a circular ring 1306, a ninth spring 1307, and a sponge bar 1308, the lower ends of the first protection shell 1301 and the second protection shell 1302 are respectively fixedly connected with the second supporting blocks 1303, the two second supporting blocks 1303 are respectively fixedly connected to the upper side surfaces of the two sliding covers 4, a square through hole is formed in the front side of the second protection shell 1302, a glass plate is installed on the square through hole of the second protection shell 1302, the first protection shell 1301 and the second protection shell 1302 are in sealing fit, the first protection shell 1301 and the second protection shell 1302 are matched with each other to form a closed protection shell, an inclined surface is arranged above the closed protection shell 1302, the inclined surface is smooth, rainwater and snow can slide along the smooth inclined surface, and cannot stay for a long time, rainwater is prevented from permeating along the joint of the first protective shell 1301 and the second protective shell 1302, a circular plate 1304 is connected inside the first protective shell 1301 in a sliding mode, an eighth spring 1305 is arranged between the first protective shell 1301 and the circular plate 1304, two ends of the eighth spring 1305 are fixedly connected to the first protective shell 1301 and the circular plate 1304 respectively, a circular ring 1306 is connected inside the second protective shell 1302 in a sliding mode, a ninth spring 1307 is arranged between the second protective shell 1302 and the circular ring 1306, two ends of the ninth spring 1307 are fixedly connected to the second protective shell 1302 and the circular ring 1306 respectively, sponge strips 1308 are fixedly connected to the inner side faces of the first protective shell 1301 and the second protective shell 1302 respectively, the gauge head of the flowmeter 7 is further protected through the eighth spring 1305, the ninth spring 1307 and the sponge strips 1308, the damage of the gauge head is avoided, the first protective shell 1301 and the second protective shell are sealed through bolts 1302 by an operator, and water is prevented from permeating into the gauge head of the flowmeter 7 and damaging the gauge head, the gauge outfit of the flowmeter 7 is protected by the eighth spring 1305, the ninth spring 1307 and the sponge strips 1308, and the flowmeter 7 is prevented from being damaged by vibration.

When the flowmeter 7 is maintained, the head seal of the flowmeter 7 does not reach the factory standard, a large amount of rainwater can enter the head of the flowmeter 7 in rainy days, most seriously, after snowing, snow can be attached to the upper side surface of the head of the flowmeter 7, water generated by continuous melting of snow can always flow on the upper side of the head of the flowmeter 7, so that a large amount of water can infiltrate into the head of the flowmeter 7, electronic components in the head can be damaged, when the sliding cover 4 is closed, the sliding covers 4 on the front side and the rear side respectively drive the first protection shell 1301 and the second protection shell 1302 to approach, when the first protection shell 1301 is contacted with the second protection shell 1302, the rear side surface of the head of the flowmeter 7 extrudes the circular plate 1304, the eighth spring 1305 is compressed, the front side surface of the head of the flowmeter 7 extrudes the circular ring 1306, the circular ring 1306 moves forwards, the ninth spring 1307 is compressed, and the sponge strip 1308 surrounds the outer side surface of the head of the flowmeter 7, then, the first protective shell 1301 and the second protective shell 1302 are screwed tightly through bolts by an operator, when rainwater and snow fall to the upper side surfaces of the first protective shell 1301 and the second protective shell 1302, the rainwater and the snow slide along the smooth inclined surface, no long-time stay is caused, rainwater is prevented from permeating along the joint of the first protective shell 1301 and the second protective shell 1302, the gauge head of the flowmeter 7 is damaged, water is prevented from permeating into the gauge head of the flowmeter 7 to damage the gauge head, meanwhile, the gauge head of the flowmeter 7 is further protected through the eighth spring 1305, the ninth spring 1307 and the sponge strip 1308, the gauge head is prevented from being damaged, and the operator can read and record through a glass plate installed on the front side surface of the second protective shell 1302.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. A protection device for an oil field flowmeter comprises a base (1), a bottom plate (2), a square shell (3), sliding covers (4), radiating fins (5), corrugated pipes (6) and a breathable shell (8), wherein the bottom plate (2) is fixedly connected to the upper side of a damping and buffering mechanism, the square shell (3) is fixedly connected to the upper surface of the bottom plate (2), ventilating grids are embedded in the front side surface and the rear side surface of the square shell (3) and are provided with two sliding covers (4), the two sliding covers (4) are slidably connected to the front part and the rear part of the upper end of the square shell (3), the radiating fins (5) are respectively arranged on the upper parts of the two sliding covers (4) and are provided with two corrugated pipes (6), the two corrugated pipes (6) are respectively communicated with the left side surface and the right side surface of the square shell (3), the two corrugated pipes (6) are slidably connected with the square shell (3), a flowmeter (7) is arranged on a clamping mechanism, the left part and the right part of the bottom plate (2) are respectively provided with square through holes, be equipped with two ventilative shells (8) altogether, two portions about two ventilative shells (8) rigid couplings in bottom plate (2) downside, two ventilative shells (8) cover respectively in the square through hole downside of bottom plate (2), characterized by, still including the shock attenuation buffering, chucking mechanism, press from both sides tight protection mechanism and sealing mechanism, the side of going up of base (1) is equipped with shock attenuation buffer mechanism, two sets of chucking mechanism rigid couplings are two portions about the side of bottom plate (2) respectively, press from both sides tight protection mechanism and locate inside square shell (3), press from both sides tight protection mechanism and flowmeter (7) and control both ends sealed cooperation, sealing mechanism is equipped with two altogether, the inner of two bellows (6) is located to two sealing mechanism symmetries respectively, sealing mechanism and flowmeter (7) sealed cooperation.

2. A protector for oilfield flowmeters according to claim 1, characterised in that the permeable casing (8) is conical in shape and has rectangular through holes on four sides.

3. The protection device for the oilfield flowmeter as defined by claim 1, wherein the shock absorption and buffering mechanism comprises a first fixed housing (901), a spline shaft (902), a first sliding block (903), first springs (904), a second fixed housing (905), a second sliding block (906), second springs (907), and upper and lower buffering components, the first fixed housing (901) is fixedly connected to the lower side of the bottom plate (2), the spline shaft (902) is fixedly connected to the front and rear sides of the inner surface of the first fixed housing (901), the first sliding block (903) is slidably connected to the spline shaft (902), the front and rear ends of the upper side of the first sliding block (903) are arranged in an arc shape, two first springs (904) are arranged, the two first springs (904) are respectively sleeved on the front and rear parts of the outer side surface of the spline shaft (904), the two ends of the two first springs (904) are respectively fixedly connected to the first fixed housing (901) of the first sliding block (903), be equipped with two second set casing (905) altogether, two second set casing (905) rigid couplings are two parts back and forth before the side on bottom plate (2), the medial surface difference sliding connection of second set casing (905) has second sliding block (906), the lower extreme of second sliding block (906) is the circular arc setting, bottom plate (2) are passed respectively in second sliding block (906), be equipped with two second springs (907) altogether, second set casing (905) is inside located to two second springs 907, the both ends difference rigid coupling of second spring (907) in second set casing (905) and second sliding block (906), two second sliding blocks (906) respectively with first sliding block (903) side back both ends cooperation before the side, first sliding block (903) downside is located to upper and lower buffering subassembly.

4. The protection device for the oilfield flowmeter as defined by claim 3, wherein the upper and lower buffering components comprise a fixed sleeve (908), a first sliding rod (909), a third fixed housing (910), a first sliding plate (911), a third spring (912), a round-head rod (913), a first fixed block (914) and a fourth spring (915), the fixed sleeve (908) is communicated with the base (1), the inner side of the fixed sleeve (908) is slidably connected with the first sliding rod (909), the lower portion of the first sliding rod (909) is provided with a circular groove, four third fixed housings (910) are provided in total, the four third fixed housings (910) are fixedly connected to the upper side of the base (1) at equal intervals along the circumferential direction of the fixed sleeve (908), the inner sides of the four third fixed housings (910) are respectively slidably connected with the first sliding plate (911), the three springs (912) are respectively provided inside the four third fixed housings (910), two ends of a third spring (912) are respectively fixedly connected to a third fixed shell (910) and a first sliding plate (911), the inner end of the first sliding plate (911) is fixedly connected with a round-head rod (913), the round-head rod (913) is matched with a circular groove of the first sliding rod (909), a first fixed block (914) is fixedly connected to the upper end of the first sliding rod (909), the first fixed block (914) is fixedly connected to the lower surface of the first sliding block (903), a fourth spring (915) is sleeved on the outer side surface of the first sliding rod (909), and two ends of the fourth spring (915) are respectively fixedly connected to the first fixed block (914) and a fixed sleeve (908).

5. The protection device for the oilfield flowmeter as defined by claim 1, wherein the clamping mechanism comprises support bars (1001), a chute case (1002), arc-shaped fixing plates (1003), tension springs (1004), second sliding bars (1005), a fifth spring (1006) and an extrusion assembly, a total of two support bars (1001) are provided, the two support bars (1001) are respectively and fixedly connected to the upper side surface of the bottom plate (2), the chute case (1002) is fixedly connected to the upper ends of the two support bars (1001), a total of two arc-shaped fixing plates (1003) are provided, the two arc-shaped fixing plates (1003) are respectively and slidably connected to the front and rear parts of the chute case (1002), the tension springs (1004) are provided between the two arc-shaped fixing plates (1003), the two ends of the tension springs (1004) are respectively and fixedly connected to the two arc-shaped fixing plates (1003), a total of two second sliding bars (1005) are provided, the two second sliding bars (1005) are respectively and slidably connected to the front and rear ends of the chute case (1002), the inner ends of the two second sliding rods (1005) are fixedly connected with the adjacent arc-shaped fixing plates (1003) respectively, two fifth springs (1006) are arranged together, the two fifth springs (1006) are sleeved on the outer sides of the second sliding rods (1005) respectively in a sleeved mode, two ends of each fifth spring (1006) are fixedly connected with the adjacent arc-shaped fixing plates (1003) and the adjacent sliding groove shell (1002) respectively, two groups of extrusion assemblies are arranged together, and the two groups of extrusion assemblies are fixedly connected to the lower side surfaces of the two sliding covers (4) respectively.

6. The protection device for the oilfield flowmeter as defined by claim 5, wherein the extrusion assembly comprises a second fixed block (1007), a sliding housing (1008), a sixth spring (1009), a first fixed mount (1010), a rotating shaft (1011), a torsion spring (1012) and an arc-shaped strip (1013), wherein the two second fixed blocks (1007) are arranged together, the two second fixed blocks (1007) are respectively and fixedly connected to the lower side surfaces of the two sliding covers (4), the lower parts of the second fixed blocks (1007) are respectively and slidably connected with the sliding housing (1008), the sixth spring (1009) is connected between the second fixed blocks (1007) and the sliding housing (1008), the first fixed mount (1010) is arranged at the lower part of the sliding housing (1008), the sliding housing (1008) and the first fixed mount (1010) are rotatably connected through the rotating shaft (1011), the torsion spring (1012) is respectively and wound around the left and right parts of the outer side surface of the rotating shaft (1011), and two ends of the torsion spring (1012) are respectively and fixedly connected to the sliding housing (1008) and the first fixed mount (1010), the lower side surface of the first fixing frame (1010) is fixedly connected with an arc-shaped strip (1013).

7. The protection device for the oilfield flowmeter as defined by claim 1, wherein the clamping protection mechanism comprises a first support plate (1101), a second support plate (1102), a lead screw (1103), a first gear (1104), a servo motor (1105), a second gear (1106), a support frame (1107), a thread sleeve (1108) and a second sliding plate (1109), the two first support plates (1101) are arranged, the two first support plates (1101) are fixedly connected to the left and right sides of the upper side of the bottom plate (2), the two second support plates (1102) are arranged, the two second support plates (1102) are fixedly connected to the front and back sides of the upper side of the bottom plate (2), the left and right sides of the lower sides of the two second support plates (1102) are provided with sliding grooves, the lead screw (1103) is rotatably connected between the two first support plates (1101), the threads of the left and right sides of the lead screw (1103) are opposite, the middle of the outer side of the lead screw (1103) is fixedly connected with the first gear (1104), servo motor (1105) rigid coupling is anterior in bottom plate (2) upper flank, servo motor (1105)'s output shaft rigid coupling has second gear (1106), first gear (1104) and second gear (1106) meshing, the inner left and right sides of two bellows (6) rigid coupling respectively has support frame (1107), the rigid coupling has thread bush (1108) between the lower part of two support frames (1107), thread bush (1108) and lead screw (1103) threaded connection, be equipped with four second sliding plate (1109) altogether, four second sliding plate (1109) rigid coupling respectively in support frame (1107) lower part lateral surface, four second sliding plate (1109) are respectively sliding connection in the spout of two parts about the downside of two second backup pads (1102).

8. The protection device for the oilfield flowmeter as defined by claim 1, wherein the sealing mechanism comprises a second fixing frame (1201), a third sliding block (1202), a seventh spring (1203), an electro-hydraulic push rod (1204), a first supporting block (1205), a fourth sliding block (1206), a T-shaped plate (1207), a fifth sliding block (1208), a first arc-shaped plate (1209), a third fixing block (1210), a second arc-shaped plate (1211) and a tapered strut (1212), wherein two second fixing frames (1201) are provided, the two second fixing frames (1201) are respectively fixed at the front and rear parts of the inner side of the square shell (3), two third sliding blocks (1202) are provided, the two third fixing frames (1202) are respectively connected outside the inner side of the two second fixing frames (1201) in a sliding manner, two seventh springs (1203) are provided, and two ends of the two seventh springs (1203) are respectively connected to the adjacent second fixing frame (1201) and the third sliding block (1202), the hydraulic support is provided with two electric hydraulic push rods (1204) in total, the left part and the right part of the lower side surfaces of the two electric hydraulic push rods (1204) are respectively and fixedly connected with a first supporting block (1205), the two first supporting blocks (1205) are fixedly connected with the upper parts of the inner side surfaces of the adjacent second supporting plates (1102), telescopic rods of the two electric hydraulic push rods (1204) are respectively and fixedly connected with a fourth sliding block (1206), the two fourth sliding blocks (1206) are respectively and slidably connected with the inner side surfaces of the adjacent second fixing frames (1201), the left side surfaces of the two fourth sliding blocks (1206) are respectively and fixedly connected with a T-shaped plate (1207), the inner side surfaces of the two second fixing frames (1201) are respectively and slidably connected with a fifth sliding block (1208), the right side surface of the fifth sliding block (1208) is respectively provided with a T-shaped sliding groove, the T-shaped plate (1207) is slidably connected in the T-shaped sliding groove of the fifth sliding block (1208), the inner side surfaces of the two fifth sliding blocks (1208) are respectively provided with a first arc-shaped plate (1209), the novel flowmeter is characterized in that a plurality of third fixing blocks (1210) are arranged, the third fixing blocks (1210) are fixedly connected to the inner side face of the first arc-shaped plate (1209) at equal intervals respectively, the inner ends of the third fixing blocks (1210) are fixedly connected with a second arc-shaped plate (1211), the left side face of the second arc-shaped plate (1211) is fixedly connected with a plurality of conical supporting rods (1212) at equal intervals, and the conical supporting rods (1212) are in sealing fit with flange circular holes of the flowmeter (7).

9. The protection device for the oilfield flowmeter as defined by claim 1, further comprising a gauge head protection mechanism, wherein the gauge head protection mechanism comprises a first protection shell (1301), a second protection shell (1302), a second supporting block (1303), a circular plate (1304), an eighth spring (1305), a circular ring (1306), a ninth spring (1307) and a sponge bar (1308), the lower ends of the first protection shell (1301) and the second protection shell (1302) are respectively and fixedly connected with the second supporting block (1303), the two second supporting blocks (1303) are respectively and fixedly connected with the upper side surfaces of the two sliding covers (4), a square through hole is formed in the front side of the second protection shell (1302), a glass plate is installed on the square through hole of the second protection shell (1302), the first protection shell (1301) is in sealing fit with the second protection shell (1302), the circular plate (1304) is slidably connected inside the first protection shell (1301), the eighth spring (1305) is arranged between the first protection shell (1301) and the circular plate (1304), two ends of the eighth spring (1305) are fixedly connected to the first protection shell (1301) and the circular plate (1304) respectively, the circular ring (1306) is connected to the inside of the second protection shell (1302) in a sliding mode, the ninth spring (1307) is arranged between the second protection shell (1302) and the circular ring (1306), two ends of the ninth spring (1307) are fixedly connected to the second protection shell (1302) and the circular ring (1306) respectively, and the inner side faces of the first protection shell (1301) and the second protection shell (1302) are fixedly connected with the sponge strips (1308) respectively.

10. The protection device for the oilfield flowmeter as defined by claim 9, wherein the first protection casing (1301) and the second protection casing (1302) cooperate to form a closed protection casing, and the upper portion of the closed protection casing is provided with an inclined surface and the inclined surface is smooth.