CN208297283U - Packing wear condition monitoring device - Google Patents

Abstract

Technical field of tools more particularly to a kind of packing wear condition monitoring device on the utility model category oil exploitation well, including filling container (1), metrological service (4) and pressure match cylinder (5)；Filling container (1) includes shell (104), shield (106), packing element (105) and packing (2)；Packing element (105) and packing (2) are respectively placed in shell (104)；Cursor (3) is located at the axis of the shell (104)；Packing (2) and packing element (105) are successively socketed with cursor (3)；The end of shield (106) and the end of packing element (105) are fixedly connected；The inner wall of shell (104) and the outer wall of packing element (105) form pressure chamber E.The utility model can extend packing service life, provide packing service wear state field data and remote information, increase to underground burst pressure and carry out real-time control, mitigate the working strength of oil recovery worker, reduce production risk.

Description

Packing wear condition monitoring device

Technical field

Technical field of tools more particularly to a kind of packing wear condition monitoring dress on the utility model category oil exploitation well It sets.

Background technique

Petroleum beam-pumping unit distribution dispersion, face domain is wide, and the polished rod seal state of each well does not have accurate dynamic data, Oil recovery worker is daily will constantly to run well observation grasp polished rod seal situation, judge that sealing quality is substantially sealed by field observation Leakage states, after once safeguarding to polished rod stuffing box, when being safeguarded again next time can not be controlled, can only be by increasing The patrol frequency monitors, and workload and working strength be larger.

To prevent from running, emit and blowout, fastening or replacement packing for sealing polish rod become major tasks, meanwhile, underground mining work Skill becomes increasingly complex, and strata pressure is varied, and polished rod stuffing box used at present cannot increase with pressure rise unexpected in well Big sealing force occurs to check out often daytime, just occurs to run at night, emit and blowout, and pollution environment causes production accident, also to being adopted Oily worker at heart according at it is very big at heart and government pressure.

In oil recovery process polished rod can exist shake, twisting and with pump horse head position deviation, cause packing use condition dislike Bad, when packing_seal, does not adapt to the dynamic of polished rod, and packing service life shortens, and replacement is frequent.

Currently, existing polished rod sealer, packing work pushes the axial compressive force generated by the pressure cap on packing box, Packing axial compressive force effect under generate radial dilatation hold tightly polished rod generate sealing force, when polished rod moves downward, packing with The frictional force and packing axial compressive force of polished rod are superimposed, and packing low pressure increases, and the frictional force of packing lower part and polished rod also adds Greatly, packing box sealing state is lower tight upper pine at this time, and similarly, when polished rod moves upwards, packing kit packing can generate the lower pine of make-up State, repetitive cycling, borehole fluid object will be overflowed from polished rod, the mode of traditional packing box compression packing_seal, allow fastening The thing of headache is compared in the control of packing dynamics at field worker operation, and the compressing force of packing is excessive, packing box upper and lower ends disk Root frictional force is bigger, and so as to cause polished rod insufficient lubrication, packing serious wear, packing reduced service life also damages polished rod, Frictional resistance is excessive simultaneously, increases power of motor, causes to waste；Packing fastening force is too small to will cause packing leakage, pollutes well head And atmospheric environment；Live packing is replaced mostly every time to be determined according to live sealing condition, is determined by field worker fastening dynamics, When what is still leaked with the fastening of maximum fastening force, packing must just be replaced, although determining that the replacement of packing is existing by experience Field work brings convenience, but causes packing utilization efficiency low, and the service life is short, improves the labor intensity of worker, and increase is produced into This.

Utility model content

The utility model overcomes the shortcomings of the prior art place and packing service life can be extended by providing one kind, provides Packing service wear state field data and remote information increase underground burst pressure and carry out real-time control, mitigate oil recovery work The working strength of people reduces the packing wear condition monitoring device of production risk.

In order to solve the above technical problems, the utility model is realized in this way:

Packing wear condition monitoring device, including filling container, metrological service and pressure match cylinder；The filling container bottom with Wellhead component is fixedly connected；The filling container includes shell, shield, packing element and packing；The packing element and packing are respectively placed in outer In shell；Cursor is located at the axis of the shell；The packing and packing element are successively socketed with cursor；The end of the shield and packing element End be fixedly connected；The inner wall of the shell and the outer wall of packing element form pressure chamber E；It is fixed with oiling on the housing Valve；The fuel feeding valve is communicated with pressure chamber E；

The metrological service includes cylinder body, piston and piston rod；Cylinder body is separated into measurement chamber C and measurement chamber by the piston D；The measurement chamber D is communicated with pressure chamber E；In the measurement chamber C, spring is equipped on piston rod；In the piston rod Piston rod displacement measuring means is equipped with cylinder body；

The pressure match cylinder includes shell and piston group；Shell is separated into matching cylinder B chamber and matching by the piston group Cylinder A chamber；The matching cylinder B chamber is communicated with measurement chamber C；The matching cylinder A chamber is communicated through triple valve with borehole fluid K chamber.

As a preferred embodiment, piston rod displacement measuring means described in the utility model includes pointer and corresponding thereto The scale answered；The pointer is vertically fixed at the end of piston rod；The scale is laterally fixed on cylinder body.

Further, piston rod displacement measuring means described in the utility model includes signal acquisition module, code-bar, signal Processing module and signal transmission module；The signal acquisition module is fixed at the end of piston rod；The code-bar is laterally fixed On cylinder body；The signal transmission port of the signal acquisition module is passed through the signal of signal processing module and signal transmission module Defeated port connects.

Further, the utility model is additionally provided with upper end base, lower end seat, pressure pad and pressure cap in the filling container；The glue The upper and lower ends of cylinder connect with upper end base and lower end seat fixing card respectively；The upper and lower ends of the shield respectively with upper end base and lower end The fixed clamping of seat；The pressure pad is placed on packing, and between upper end base and cursor；The pressure cap is set on pressure pad, And it is threadedly coupled with shell (104).

Further, 0.2≤F of pressure chamber E fill cup hydraulic described in the utility model≤0.8Mpa.

Further, the utility model is equipped with silk plug on the measurement chamber C.

Further, rubber, plastics or softer metals can be used in packing element described in the utility model.

When the utility model installs packing, filling container pressure cap is screwed with the pre-fastening moment of 15 Kilogram Force Per Meters or so, passes through pressure Pad compression packing, completes packing installation, compared to the current Polish rod packing sealing device used, installation strength is small；It works normally When, the pressure of accumulation of energy is transmitted in filling container pressure chamber E by liquid in the measurement chamber D of metrological service, and packing element is in pressure chamber E liquid Radial contraction under the action of body pressure generates radial contraction pressure to packing element inner cavity packing, under the action of radial contraction pressure, Packing and polished rod generate sealing function, since packing_seal active force is that the radial force applied by packing element generates, change Traditional sealing means being compressed axially, therefore when polished rod moves back and forth, without because making the axial compressive force of packing_seal Superposition, reduce frictional force of the packing in reciprocating motion, improve the lubricant environment of polished rod, reduce packing friction damage Consumption, increases packing service life；Further, when packing is under polished rod reciprocating motion effect, internal diameter will become when generating abrasion Greatly, the radial contraction pressure that packing element generates under in energy storage pressure makes packing radially continue to shrink progress automatic compensation sealing, phase Than the existing seal form for being compressed axially packing, using in the same service life of identical packing, traditional packing box is wanted when working For several times, the utility model packing tool-wear monitoring device can reach without fastening and maintenance in identical service life, and reduction is adopted for maintenance The working strength of oily worker；Further, the packing element in filling container is elastomer, and packing element external pressure chamber E is full of control oil, light The offset that the shake that geometry deformation existing for bar itself and polished rod generate when moving back and forth, twisting and position of polished rod deviation generate, To the improper extruding of packing dynamic, packing can be all driven by polished rod, packing drives displacement movement of the packing element in pressure chamber E Elimination is compensated, the utility model packing tool-wear monitoring device filling container is good to polished rod dynamically adapting, eliminates to greatest extent Packing eccentric wear is leaked, and extends the service life of packing；Further, borehole fluid pressure is logical in borehole fluid K chamber It crosses triple valve and enters matching cylinder A chamber, act on pressure match mechanism piston group, match cylinder B chamber in pressure match mechanism piston group New pressure is inside obtained, be transmitted to metrological service measurement chamber C by control oil and is acted on metrological service's piston, on the piston right side The pressure and metrological service's spring that portion measurement chamber D is obtained generate energy-storage pressure and pass to filling container pressure chamber E through oil liquid together, this Pressure acts on filling container packing element external compression packing_seal, and such filling container packing_seal power is controlled by two pressure, and one It is the energy storage pressure that metrological service's piston compressed spring is formed, this pressure provides a baseline seal pressure for packing_seal, Guarantee to prevent packing from there is no sealing force to generate fluid without pressure or hypotony in well and overflow；Another is exactly borehole fluid pressure Be transmitted to the pressure of filling container pressure chamber E through metrological service by the conversion of matching mechanism for seedlings, this pressure change with borehole pressure and Variation, for borehole fluid pressure after matching mechanism for seedlings matches, the pressure finally acted on filling container packing element is optimum pressure, Under the premise of guaranteeing filling container packing_seal effect, move back and forth polished rod minimum with the frictional force of packing, effective solution The problem of traditional packing kit packing fastening force has no basis can more prevent traditional packing box when borehole pressure increases suddenly, pole The leakage even problem of blowout out of control easily occurs；Further, when the packing abrasion in filling container, packing radial thickness becomes Small, external packing element gradually tapers up under the action of pressure chamber E pressure, and filling container pressure chamber E volume becomes larger, metrological service's metering The control oil stream of chamber D enters filling container pressure chamber E and is supplemented, and metrological service's piston switching to pressure in spring thrust and well acts on Under move right, metrological service's piston rod drives pointer to move to right, the scale on pointer indicator scale, and the scale correspondence on scale is filled out The feed bin packing radial dimension degree of wear, the abrasion of filling container packing is more serious, and E chamber volume becomes bigger, metrological service's piston 407 The distance to move right is bigger, and most left scale is expressed as new packing state on scale 410, and mid-scale is expressed as alert status, Nethermost scale is hard stop state, and pointer indicator scale state provides intuitive packing for live patrol personnel and uses number According to pointer meaning state can be converted into wired or wireless control signal, do not patrolled by electric signal transducer on the downside of corresponding scale Well realizes the remotely monitoring to packing state therebetween, and the utility model packing tool-wear monitoring device provides effectively for packing replacing Parameter, keep the opportunity of packing replacing more accurate, reduce the labor intensity of worker, remote parameter monitoring more can be to production station Numerous oil well packing sealing situations carry out concentrated collection, analysis in area, constantly grasp wellhead polish rod and seal situation, for safety in production It provides safeguard.

Detailed description of the invention

The utility model is described in further detail with reference to the accompanying drawings and detailed description.The protection model of the utility model Enclose the statement for being not only limited to following content.

Fig. 1 is the overall structure diagram of the utility model.

Fig. 2 is the utility model piston rod displacement measuring means another embodiment structural schematic diagram.

In figure: 1, filling container；2, packing；3, cursor；4, metrological service；5, pressure match cylinder；101, pressure pad；102, it presses Cap；103, upper end base；104, shell；105, packing element；106, shield；107, lower cover；108, lower end seat；109, fuel feeding valve； 401, cylinder cap；402, the first sealing ring；403, spring；404, cylinder body；405, silk plug；406, the second sealing ring；407, piston； 408, pointer；409, fixing glue；410, scale；411, electric signal transducer；412, piston rod；413, signal acquisition module； 414, code-bar；415, signal processing module；416, signal transmission module；501, upper cylinder cover；502, shell；503, third seals Circle；504, the 4th sealing ring；505, piston group；506, lower cylinder cap；507, triple valve.

Specific embodiment

As shown in Figure 1, packing wear condition monitoring device, including filling container 1, metrological service 4 and pressure match cylinder 5；Institute 1 bottom of filling container is stated to be fixedly connected with wellhead component；The filling container 1 includes shell 104, shield 106, packing element 105 and packing 2；The packing element 105 and packing 2 are respectively placed in shell 104；Cursor 3 is located at the axis of the shell 104；The packing 2 with Packing element 105 is successively socketed with cursor 3；The end of the shield 106 and the end of packing element 105 are fixedly connected；The shell 104 The outer wall of inner wall and packing element 105 forms pressure chamber E；Fuel feeding valve 109 is fixed on the shell 104；The fuel feeding valve 109 It is communicated with pressure chamber E.

The metrological service 4 includes cylinder body 404, piston 407 and piston rod 412；The piston 407 separates cylinder body 404 At measurement chamber C and measurement chamber D；The measurement chamber D is communicated with pressure chamber E；In the measurement chamber C, set on piston rod 412 There is spring 403；Piston rod displacement measuring means is equipped on the piston rod 412 and cylinder body 404.

The pressure match cylinder 5 includes shell 502 and piston group 505；Shell 502 is separated by the piston group 505 With cylinder B chamber and matching cylinder A chamber；The matching cylinder B chamber is communicated with measurement chamber C；The matching cylinder A chamber is through in triple valve 507 and well Fluid K chamber communicates.

Piston rod displacement measuring means described in the utility model includes pointer 408 and scale 410 corresponding thereto；Institute State the end that pointer 408 is vertically fixed at piston rod 412；The scale 410 is laterally fixed on cylinder body 404.

Shown in Figure 2, piston rod displacement measuring means described in the utility model includes signal acquisition module 413, code Item 414, signal processing module 415 and signal transmission module 416；The signal acquisition module is fixed at the end of piston rod 412 Portion；The code-bar 414 is fastened transversely on cylinder body 404；The signal transmission port of the signal acquisition module 413 through signal at Reason module 415 connects with the signal transmission port of signal transmission module 416.When piston rod 412 moves along a straight line, piston rod 412 drive signal acquisition module 413(can use reflective photoelectric switch) it is mobile, when light and dark code-bar is adopted by signal When collecting module 413, corresponding pulse is generated, this pulse signal is sent into signal processing module 415 and is handled, then through signal Transmission module 416 carries out remote transmission.

The utility model is additionally provided with upper end base 103, lower end seat 108, pressure pad 101 and pressure cap 102 in the filling container 1；Institute The upper and lower ends for stating packing element 105 are fixed with upper end base 103 and lower end seat 108 respectively to be clamped；The upper and lower ends of the shield 106 point It does not fix and is clamped with upper end base 103 and lower end seat 108；The pressure pad 101 is placed on packing 2, and is located at upper end base 103 and light Between mark 3；The pressure cap 102 is set on pressure pad 101, and is threadedly coupled with shell 104.

0.2≤F of pressure chamber E fill cup hydraulic described in the utility model≤0.8Mpa.The utility model is on the measurement chamber C Equipped with silk plug 405.Packing element 105 described in the utility model is using rubber, plastics or softer metals.

The utility model packing wear condition monitoring device essential core component includes filling container 1, metrological service 4 and pressure Match cylinder 5；The filling container 1 is connect by 107 left end screw thread of lower cover with wellhead component, and lower cover 107 passes through with shell 104 It is threadedly coupled, in shell 104 and lower cover 107, lower end seat 108, shield 106, packing element 105 and upper end base 103 is installed.Under End seat 108 is connect by upper end external groove with 105 lower end inner convex platform of packing element, and packing element 105 passes through upper end inner convex platform and upper end base 103 Upper end external groove is connected, and shield 106 is connected with lower end seat 108 and 103 exterior bayonet slot of upper end base respectively by both ends inner convex platform, It is mounted in shell 104 after forming an entirety, upper end is limited by the boss of upper end base 103 with shell 104, and lower end is logical It crosses lower cover 107 to be fitted in shell 104, further, packing 2 is mounted on cursor 3, and lower end is lower end seat 108, and upper end is Pressure pad 101,101 top of pressure pad are pressure caps 102, and pressure cap 102 is attached with shell 104 by screw thread, backspin dynamic pressure cap 102, Packing 2 can be compressed by pressure pad 101, can adjust packing 2 and preload pressure is installed, preload pressure controls on 15 Kgfs of left sides It is right；Further, shell 104 and packing element 105 form pressure chamber E, can inject control by the check valve 109 on 104 right side of shell Oil, fill cup hydraulic control pressure in 0.2~0.8Mpa, the benchmark as system；The metrological service 4 is located at filling container 1 Left side is connected by 401 right side screw thread of cylinder cap with the connector on 1 shell of filling container, and 401 left end of cylinder cap passes through screw thread and cylinder body 404 connections, cylinder body 404 are provided with piston 407, and the first sealing ring 402 is housed between piston 407 and cylinder body 404；Piston rod 412 Second sealing ring 406 is housed between cylinder body 404；Spring 403 is mounted on piston rod 412, and pointer 408 is mounted on piston rod 412 left ends, fixed by fixing glue 409 and piston rod 412, scale 410 is located at 408 downside of pointer, is mounted on cylinder body 404 Face, electric signal transducer 411 are mounted on the downside of scale, and pointer 408, can be in scale 410 under the drive of 412 left and right displacement of piston rod It horizontally slips within the scope of high scale, scale section of the pointer 408 on scale can be slided and be converted into electricity by electric signal transducer 411 Letter is exported, and is transferred to remote control terminal by wired or wireless means, is remotely monitored to packing use state, is carried out Long-range management.

The utility model packing wear condition monitoring device course of work is: installation packing 2, with 15 kilograms or so of power to Lower fastening pressure cap 102, pressure pad 101 compress packing under the action of 102 thrust of pressure cap, complete installation；Pass through 1 right side of filling container Check valve 109 infuses control oil to pressure chamber E, and control oil flows to the left through pressure chamber E carries out metrological service's measurement chamber D, dosing machine 4 inner piston 407 of structure compressed spring 403 under the action of controlling oil moves downward, and piston rod 412 drives pointer 408 to move downward, When pointer 408 indicator scale 410 most left scale line, filling container 1, which controls oil injection, to be terminated, and maximum pressure control is on the left side 0.8Mpa The right side, the measured mechanism 4 of this pressure store；The silk plug 405 in metrological service 4 is opened, injects control oil, control oil to measurement chamber C Enter the matching cylinder B chamber of pressure match cylinder 5 through measurement chamber C, piston group 505 is pushed to be moved downwardly to matching cylinder B chamber bottom, meter Measuring mechanism measurement chamber C injection control oil terminates, and on the basis of filling oil, fastens silk plug 405；Working condition, polished rod 3 move back and forth band When dynamic underground oil pump is started to work, borehole fluid pressure enters matching cylinder A chamber, fluid pressure through triple valve 507 by borehole fluid K chamber Power is transmitted to measurement chamber C by matching cylinder B chamber control oil after piston group 505 carries out pressure conversion, and measurement chamber D obtains measurement chamber C It is transmitted to pressure chamber E through controlling oil with the pressure resultant force of 403 accumulation of energy of spring, is acted on outside packing element 105,105 resultant force of packing element Systolic pressure is generated to packing 2 under effect, packing 2 generates the sealing force to polished rod 3 under the work of 105 convergent force of packing element, guarantees Fluid in well is non-leakage, since sealing force is with the change in pressure in well, high pressure can be prevented out of control, low pressure or nothing in well When pressure, the pressure of 0.8Mpa of metrological service's accumulation of energy or so guarantees packing not overflow, and packing_seal works by whole-process control； Packing 2 is under 3 reciprocal movement friction of polished rod, it may occur that normal wear causes packing chamber volume to become after packing 2 is worn Small, under control oil effect radial contraction occurs for packing element 105, and pressure chamber E volume becomes larger, and measurement chamber D controls oil stream to pressure chamber E, piston 407 move right under the pressure resultant force effect that spring energy-storage pressure and borehole fluid transmitting are come, and 407 bar of piston drives Pointer 408 moves right, and the state of wear of such packing 2 is reacted directly into 4 pointer of metrological service, 408 end, and with 410 quarter of scale Degree is shown, carries out signal conversion with electric signal transducer, when pointer 408, which moves right, is directed toward early warning graduation mark, is carried out Packing 2 is replaced, shutdown of pumping machine, closes triple valve 507, fluid path disconnects in pressure match cylinder 5 and well, while pressure match Cylinder A chamber is communicated by triple valve 507 with atmosphere, is carried out pressure release to matching cylinder A chamber, is removed pressure cap 102, take out pressure pad 101 and disk Root 2 installs new packing 2, pressure pad 101, is screwed down pressure cap 102, and new packing 2 generates radial under the pressure effect of pressure pad 101 Expansion, pushes out packing element and expands outwardly, and pressure chamber E volume becomes smaller, and control oil is compressed to measurement chamber D, and piston 407 is pushed to press Contracting spring 403 moves downward, and when pointer 408 is directed toward 410 left end scale of scale, the replacement of packing 2 is completed, and opens triple valve 507, start pumping unit, 2 wear condition monitoring device of packing can put into normal use.

In the description of the present invention, it should be understood that term " axis ", " bottom ", " one end ", " top ", " in The orientation or positional relationship of the instructions such as portion ", " other end ", "upper", " side ", " top ", "inner", " front " and " both ends " is base In orientation or positional relationship shown in the drawings, be merely for convenience of describing the present invention and simplifying the description, rather than indicate or It implies that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as Limitations of the present invention.

In the present invention unless specifically defined or limited otherwise, term " installation ", " setting ", " connection ", " Gu Calmly ", the terms such as " being screwed on " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral； It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, can also indirectly connected through an intermediary, it can be with It is the interaction relationship of the connection or two elements inside two elements, unless otherwise restricted clearly, for this field For those of ordinary skill, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.

While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art, It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.

Claims (7)

1. packing wear condition monitoring device, which is characterized in that including filling container (1), metrological service (4) and pressure match cylinder (5)；Filling container (1) bottom is fixedly connected with wellhead component；The filling container (1) include shell (104), shield (106), Packing element (105) and packing (2)；The packing element (105) and packing (2) are respectively placed in shell (104)；Cursor (3) is located at described The axis of shell (104)；The packing (2) and packing element (105) are successively socketed with cursor (3)；The end of the shield (106) with The end of packing element (105) is fixedly connected；The inner wall of the shell (104) and the outer wall of packing element (105) form pressure chamber E；Institute It states and is fixed with fuel feeding valve (109) on shell (104)；The fuel feeding valve (109) communicates with pressure chamber E；

The metrological service (4) includes cylinder body (404), piston (407) and piston rod (412)；The piston (407) is by cylinder body (404) it is separated into measurement chamber C and measurement chamber D；The measurement chamber D is communicated with pressure chamber E；In the measurement chamber C, in piston rod (412) spring (403) are equipped on；Piston rod displacement measuring machine is equipped on the piston rod (412) and cylinder body (404) Structure；

The pressure match cylinder (5) includes shell (502) and piston group (505)；The piston group (505) divides shell (502) It is divided into matching cylinder B chamber and matching cylinder A chamber；The matching cylinder B chamber is communicated with measurement chamber C；The matching cylinder A chamber is through triple valve (507) it is communicated with borehole fluid K chamber.

2. packing wear condition monitoring device according to claim 1, it is characterised in that: the piston rod displacement measurement Mechanism includes pointer (408) and scale (410) corresponding thereto；The pointer (408) is vertically fixed at piston rod (412) End；The scale (410) is laterally fixed on cylinder body (404).

3. packing wear condition monitoring device according to claim 1, it is characterised in that: the piston rod displacement measurement Mechanism includes signal acquisition module (413), code-bar (414), signal processing module (415) and signal transmission module (416)；It is described Signal acquisition module is fixed at the end of piston rod (412)；The code-bar (414) is fastened transversely on cylinder body (404)；Institute State signal of the signal transmission port of signal acquisition module (413) through signal processing module (415) Yu signal transmission module (416) Transmission port connects.

4. any packing wear condition monitoring device according to claim 1~3, it is characterised in that: in the filling container (1) upper end base (103), lower end seat (108), pressure pad (101) and pressure cap (102) are additionally provided with；The upper and lower ends of the packing element (105) It fixes and is clamped with upper end base (103) and lower end seat (108) respectively；The upper and lower ends of the shield (106) respectively with upper end base (103) and lower end seat (108) fixes clamping；The pressure pad (101) is placed on packing (2), and is located at upper end base (103) and light It marks between (3)；The pressure cap (102) is set on pressure pad (101), and is threadedly coupled with shell (104).

5. packing wear condition monitoring device according to claim 4, it is characterised in that: the pressure chamber E fill cup hydraulic 0.2≤F≤0.8Mpa。

6. packing wear condition monitoring device according to claim 5, it is characterised in that: be equipped on the measurement chamber C Silk plug (405).

7. packing wear condition monitoring device according to claim 6, it is characterised in that: the packing element (105) uses rubber Glue, plastics or softer metals.