CN213041457U

CN213041457U - Mechanical seal off-line detection assembly and system and detection vehicle

Info

Publication number: CN213041457U
Application number: CN202021654653.9U
Authority: CN
Inventors: 崔利; 刘星; 樊晋; 王震; 赵旭光; 王景龙; 陈煜翔
Original assignee: China General Nuclear Power Corp; CGN Power Co Ltd; China Nuclear Power Operation Co Ltd
Current assignee: China General Nuclear Power Corp; CGN Power Co Ltd; China Nuclear Power Operation Co Ltd
Priority date: 2020-08-11
Filing date: 2020-08-11
Publication date: 2021-04-23
Anticipated expiration: 2030-08-11

Abstract

The utility model relates to a mechanical seal off-line measuring subassembly and system, detection car, include: the device comprises a detection box body, a sealing cover and a mechanical sealing element, wherein the upper part of the detection box body is provided with a sealing cover for sealing and supporting a first end face of the mechanical sealing element, the sealing cover is provided with an opening, and the detection box body is provided with a communicating hole; the sealing support body is arranged in the detection box body, the end face of the sealing support body faces the opening, and the sealing support body is used for sealing and supporting a second end face of the mechanical sealing element which penetrates through the opening and is arranged on the sealing support body; and the fixing part is arranged above the detection box body and used for fixing the mechanical sealing element. The detection is convenient after the installation, and the mechanical seal is not damaged in the detection process; can detect and ensure mechanical seal's encapsulated situation, avoid operating the in-process working medium to leak and lead to becoming invalid, detect the reliability height, can normal use after detecting and confirming no mistake to can fully guarantee the safe and stable operation of water pump.

Description

Mechanical seal off-line detection assembly and system and detection vehicle

Technical Field

The utility model relates to a sealed test field especially relates to mechanical seal off-line measuring subassembly and system, detection car.

Background

The safe operation of the important water pump of the nuclear power station is directly related to the safe and stable operation of the nuclear power unit. The mechanical seal is the most widely applied device for preventing the shaft seal from leaking on the water pump, the condition of the mechanical seal is directly related to the safe and stable operation of the pump, and the leakage of working medium caused by the poor tightness of the mechanical seal is the most common failure mode, so that the mechanical seal needs to be detected in advance.

At present, the detection of most mechanical seals of nuclear power plants only determines the tightness of the mechanical seals by visually checking the states of the parts of the mechanical seals, and a precise detection means or device is not used for checking or verifying the tightness of the mechanical seals, so that most important pump set mechanical seals need to be sent to a mechanical seal manufacturer for special detection, and the transportation bump of the mechanical seals on the way increases the risk of the mechanical seals being damaged (similar transportation damage events occur). In order to solve the problem, a water pressure detection tool can be designed to detect the pump set machinery, however, the reliability of water pressure detection is not high, and faults still occur after the detection is normal.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a mechanical seal off-line detection assembly, a mechanical seal off-line detection system and a mechanical seal off-line detection vehicle for the problems of troublesome and unreliable detection and easy damage of internal structure during outward detection.

An off-line mechanical seal detection assembly comprising:

the device comprises a detection box body, a sealing cover and a mechanical sealing element, wherein the upper part of the detection box body is provided with a sealing cover for sealing and supporting a first end face of the mechanical sealing element, the sealing cover is provided with an opening, and the detection box body is provided with a communicating hole;

the sealing support body is arranged in the detection box body, the end face of the sealing support body faces the opening, and the sealing support body is used for sealing and supporting a second end face of the mechanical sealing element which penetrates through the opening and is arranged on the sealing support body;

and the fixing part is arranged above the detection box body and used for fixing the mechanical sealing element.

The mechanical seal off-line detection assembly has at least the following beneficial technical effects:

(1) the sealing cover and the sealing support body of the embodiment can respectively correspond to the first end face and the second end face of the mechanical sealing part for sealing and supporting, and the detection medium is prevented from overflowing from the space between the sealing cover and the first end face and the space between the sealing support body and the second end face, so that the detection box body forms a completely sealed structure while the mechanical sealing part is fixed, and the double end faces are comprehensively detected. After the detection medium is filled into the interior, whether the tightness of the mechanical sealing element is qualified or not is judged by detecting the change of the internal pressure of the box body after a certain time interval.

(2) The detection is convenient after the installation, and the outward sending detection is not needed, so that the problem of mechanical seal damage caused by transportation bump is avoided, and the mechanical seal cannot be changed or damaged at all in the detection process;

(3) the sealing state can be detected and ensured, failure caused by leakage of working medium in the operation process is avoided, the detection reliability is high, the sealing device can be normally used after detection and confirmation are correct, and the probability of failure in subsequent use is very low. Thereby can fully guarantee the safe and stable operation of water pump.

(4) The embodiment can be suitable for more than 90% of pump types of nuclear power important pumps, and various mechanical seals can be freely detected only by replacing the corresponding sealing covers.

In one embodiment, the height of the seal support is adjustable.

In one embodiment, a telescopic supporting body is arranged inside the detection box body, two ends of the telescopic supporting body in the length direction are respectively abutted against the bottom plate surface of the detection box body and the lower surface of the sealing supporting body, and the length of the telescopic supporting body can be extended and contracted so as to adjust the height of the sealing supporting body.

In one embodiment, the fixing member includes:

the pressure head is arranged above the detection box body, and the lower end surface of the pressure head is in contact with the top end surface of the mechanical sealing element to limit the upward movement of the mechanical sealing element;

the connecting rod sequentially penetrates through the sealing support body, the mechanical sealing element and the pressure head, the bottom end of the connecting rod is arranged on the surface of the bottom plate of the detection box body, and the top end of the connecting rod is exposed out of the pressure head;

the fastener is arranged at the top end of the connecting rod in a rotating mode, and the lower end face of the fastener is abutted to the upper end face of the pressure head.

In one embodiment, the connecting rod includes a screw rod and a fixing seat connected to each other, the fixing seat is disposed inside the detection box and penetrates through the sealing support, one end of the screw rod is connected to the fixing seat, and the other end of the screw rod penetrates through the mechanical seal and the pressure head and is exposed out of the upper end surface of the pressure head.

In one embodiment, a sealing member is disposed between the fixing seat and the sealing support body.

In one embodiment, the lower end surface of the pressure head is matched with the shape of the top end surface of the mechanical seal and is attached to the top end surface of the mechanical seal.

In one embodiment, the sealing cover is detachably arranged on the detection box body, and a sealing structure is arranged between the end face, facing the detection box body, of the sealing cover and the detection box body.

In one embodiment, the sealing cover comprises a cover body and a first sealing gasket arranged on the surface of the cover body.

In one embodiment, the sealing support body comprises a support body and a second sealing gasket arranged on the surface of the support body.

The mechanical seal off-line detection system comprises an air source, a main loop, a detection loop and a mechanical seal off-line detection assembly, wherein the air source, the main loop and the detection loop are sequentially connected, the main loop is provided with a main switch, the detection loop is provided with a detection switch and a first pressure measurement device, and the other end of the detection loop is connected to a communication hole of the mechanical seal off-line detection assembly.

In one embodiment, the mechanical seal off-line detection assembly further comprises a pressure relief pipeline connected with the main circuit, wherein a pressure relief valve is arranged on the pressure relief pipeline, and the pressure relief valve can be opened to relieve pressure of the mechanical seal off-line detection assembly.

In one embodiment, the system further comprises a filter pressure reducing valve and a second pressure measuring device which are arranged in the main circuit, and the filter pressure reducing valve and the second pressure measuring device are located between the air source and the main switch.

The mechanical seal off-line detection system is arranged on the detection vehicle.

Drawings

Fig. 1 is a schematic view of an off-line mechanical seal detection assembly according to an embodiment of the present invention;

fig. 2 is a schematic view of an off-line mechanical seal detection system according to an embodiment of the present invention;

in the figure, the position of the upper end of the main shaft,

10. a mechanical seal off-line detection assembly; 100. detecting the box body; 110. a sealing cover; 111. an opening; 112. a first gasket; 113. a sealing structure; 120. a communicating hole; 130. a telescopic support body; 131. a support base;

200. a sealing support body; 210. a support body; 220. a second gasket; 230. a seal member;

300. a fixing member; 310. a pressure head; 320. a connecting rod; 321. a screw rod; 322. a fixed seat; 330. a fastener;

400. a mechanical seal; 410. a first end face; 420. a second end face;

20. a gas source; 30. a main loop; 31. a main switch; 32. a filtering pressure reducing valve; 33. a second pressure measurement device; 40. a detection circuit; 41. a detection switch; 42. a first pressure measurement device; 50. a pressure relief pipeline; 51. a pressure relief valve.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

To facilitate an understanding of the present invention, various embodiments defined by the claims of the present invention will be described more fully hereinafter with reference to the accompanying drawings. While the preferred embodiments of the present invention have been illustrated in the accompanying drawings, it is understood that the same is by way of example only and is not to be taken by way of limitation. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Accordingly, those of ordinary skill in the art will recognize that changes and modifications may be made to the various embodiments described herein without departing from the scope of the present invention, which is defined by the following claims. Moreover, descriptions of well-known functions and constructions may be omitted for clarity and conciseness.

It will be apparent to those skilled in the art that the following descriptions of the various embodiments of the present invention are provided for illustration only and not for the purpose of limiting the invention as defined by the appended claims.

Throughout the description and claims of this specification, the words "comprise" and variations of the words, for example "comprising" and "comprises", mean "including but not limited to", and are not intended to (and do not) exclude other components, integers or steps. Features, integers or characteristics described in conjunction with a particular aspect, embodiment or example of the invention are to be understood to be applicable to any other aspect, embodiment or example described herein unless incompatible therewith.

It is to be understood that the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. The expression "comprising" and/or "may comprise" as used in the present invention is intended to indicate the presence of corresponding functions, operations or elements, and is not intended to limit the presence of one or more functions, operations and/or elements. Furthermore, in the present application, the terms "comprises" and/or "comprising" are intended to indicate the presence of the features, quantities, operations, elements, and components, or combinations thereof, disclosed in the specification. Thus, the terms "comprising" and/or "having" should be understood as presenting additional possibilities for one or more other features, quantities, operations, elements, and components, or combinations thereof.

In the present application, the expression "or" encompasses any and all combinations of the words listed together. For example, "a or B" may comprise a or B, or may comprise both a and B.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present; when an element is referred to as being "connected" or "coupled" to another element, it can be directly or indirectly coupled to the other element or intervening elements may also be present.

References herein to "upper", "lower", "left", "right", etc. are merely intended to indicate relative positional relationships, which may change accordingly when the absolute position of the object being described changes.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present specification and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1, in an embodiment of the present invention, a mechanical seal offline inspection assembly 10 is provided, including:

a detection box 100, wherein a sealing cover 110 for sealing and supporting a first end surface 410 of a mechanical sealing element 400 is arranged at the upper part of the detection box 100, an opening 111 is arranged on the sealing cover 110, and a communication hole 120 is arranged on the detection box 100;

a seal support 200 disposed inside the detection box 100, wherein an end surface of the seal support 200 faces the opening 111, and a second end surface 420 of the mechanical seal 400 passing through the opening 111 and disposed on the seal support 200 is sealingly supported;

and a fixing member 300 provided above the inspection case 100 to fix the mechanical seal 400.

Specifically, the mechanical seal 400 is first placed at the opening 111 of the seal cover 110, the first end surface 410 is provided on the surface of the seal cover 110, the second end surface 420 is provided on the end surface of the seal support 200, the mechanical seal 400 is fixed by the fixing member 300, and the communication hole 120 is connected to the supply system, at which time the mechanical seal 400 can be fixed and the inspection chamber 100 forms a completely sealed structure, and inspection can be started. During detection, the supply system is started to fill detection media such as compressed air or compressed liquid into the detection box body 100, when the detection pressure value is reached, the supply system is closed, and if the internal sealing performance of the mechanical sealing element 400 is poor, the detection media overflow from the mechanical sealing element 400 so as to detect the internal pressure drop of the box body 100; if the mechanical seal 400 has good internal sealing performance, the detection medium hardly overflows from the mechanical seal 400, and the internal pressure of the detection tank 100 is stable and constant.

The sealing cover 110 and the sealing support 200 of the present embodiment may respectively correspond to the first end surface 410 and the second end surface 420 of the mechanical seal 400, so as to prevent the detection medium from overflowing between the sealing cover 110 and the first end surface 410 and between the sealing support 200 and the second end surface 420, thereby fixing the mechanical seal 400 and simultaneously forming the detection box 100 into a completely sealed structure for overall detection of both end surfaces. After the inside is filled with the detection medium, whether the sealability of the mechanical seal 400 is qualified is determined by detecting the change in the internal pressure of the case 100 after a certain time interval.

The detection is convenient after the installation, and the outward sending detection is not needed, so that the problem of mechanical seal damage caused by transportation bump is avoided, and the mechanical seal cannot be changed or damaged at all in the detection process;

the sealing state can be detected and ensured, failure caused by leakage of working medium in the operation process is avoided, the detection reliability is high, the sealing device can be normally used after detection and confirmation are correct, and the probability of failure in subsequent use is very low. Thereby can fully guarantee the safe and stable operation of water pump.

The embodiment can be suitable for more than 90% of pump types of nuclear power important pumps, and various mechanical seals can be freely detected only by replacing the corresponding sealing covers 110.

Referring to fig. 1, in some embodiments, the height of the seal support 200 is adjustable. Specifically, the mechanical sealing elements 400 have various types, and the mechanical sealing elements 400 of different types have different end surface forms, and the relative height between the sealing support body 200 and the sealing cover 110 can be changed by adjusting the height of the sealing support body 200, so that the first end surface 410 and the second end surface 420 having different height differences are correspondingly supported in a sealing manner, so as to adapt to the detection of the mechanical sealing elements 400 of different types.

Referring to fig. 1, in some embodiments, a telescopic support 130 is disposed inside the detection box 100, two ends of the telescopic support 130 along a length direction respectively abut against a bottom surface of the detection box 100 and a lower surface of the sealing support 200, and the length of the telescopic support 130 is telescopic so as to adjust a height of the sealing support 200. Specifically, the length of the retractable support 130 is adjusted according to the height difference between the first end surface 410 and the second end surface 420, so that the relative height between the end surface of the seal support 200 and the surface of the seal cover 110 is consistent with the height difference between the first end surface 410 and the second end surface 420, that is, the first end surface 410 and the second end surface 420 can be simultaneously supported in a sealing manner, and flexible support for different types of mechanical seals 400 is realized.

Further, the telescopic support 130 includes an air cylinder, an oil cylinder or an electric telescopic sleeve, and the air cylinder, the oil cylinder or the electric telescopic sleeve can be disposed on the support base 131, so that the stability is stronger. The cylinder, the oil cylinder or the electric telescopic sleeve can be driven to extend or shorten by power in corresponding forms respectively, so that the height of the sealing support body 200 can be adjusted, and different types of mechanical sealing elements 400 can be supported adaptively. The telescopic supporting body 130 may further include a supporting spring, and the height of the sealing supporting body 200 may also be adjusted when the length of the supporting spring is changed.

Referring to fig. 1, in some embodiments, the fixing member 300 includes:

a ram 310 disposed above the inspection box 100, wherein a lower end surface of the ram 310 contacts a top end surface of the mechanical seal 400 to limit upward movement of the mechanical seal 400;

the connecting rod 320 sequentially penetrates through the seal supporting body 200, the mechanical seal 400 and the pressure head 310, the bottom end of the connecting rod 320 is arranged on the bottom plate surface of the detection box 100, and the top end of the connecting rod 320 is exposed out of the pressure head 310;

and the fastening piece 330 is screwed on the top end of the connecting rod 320, and the lower end surface of the fastening piece 330 is abutted against the upper end surface of the pressure head 310.

Specifically, the mechanical seal 400 and the ram 310 are sequentially sleeved on the connecting rod 320, the first end face 410 of the mechanical seal 400 is disposed on the surface of the sealing cover 110, the second end face 420 of the mechanical seal 400 is disposed on the end face of the sealing support 200, the fastening member 330 is screwed to the top end of the connecting rod 320, the lower end face of the fastening member 330 abuts against the upper end face of the ram 310, and the mechanical seal 400 is further firmly fixed on the detection box 100 by the ram 310.

In this embodiment, the fixing component 300 has a simple structure, can fix the mechanical sealing element 400, can avoid the damage to surrounding equipment and operators caused by the fact that the mechanical sealing element 400 is separated from the detection box 100 and flies out due to the overlarge internal pressure of the detection box 100 during detection, and ensures the safety of the detection process.

In some embodiments, the connecting rod 320 includes a screw rod 321 and a fixing seat 322 connected to each other, the fixing seat 322 is disposed inside the detection box 100 and penetrates through the sealing support 200, one end of the screw rod 321 is connected to the fixing seat 322, and the other end of the screw rod passes through the mechanical seal 400 and the pressure head 310 and is exposed to the upper end surface of the pressure head 310. When the mechanical seal 400 and the pressing head 310 are installed, the screw rod 321 can be operated to penetrate through the mechanical seal 400 and the pressing head 310 and install the fastener 330; during disassembly, the fastening member 330 is unscrewed and the screw rod 321 is unscrewed, and then the mechanical sealing element 400 and the pressing head 310 are removed. In this embodiment, the mechanical seal 400 and the pressure head 310 do not need to be operated to lift the top of the connecting rod 320 and then to be sleeved on the connecting rod 320 during disassembly and assembly, which is more convenient in operation, and especially when the thickness and weight of the mechanical seal 400 and the pressure head 310 are larger, the arrangement can obviously save physical strength and improve operation efficiency, and avoid the risk of falling off when the mechanical seal 400 and the pressure head 310 are lifted; in addition, the lead screw 321 with different lengths can be selected according to the lengths of the mechanical seal 400 and the pressure head 310, so that the use flexibility is higher.

Further, a sealing member 230 is disposed between the fixing seat 322 and the sealing support 200. Specifically, the sealing member 230 can prevent the detection medium in the detection box 100 from overflowing from between the fixing seat 322 and the seal support 200 and flowing out along the mechanical seal 400 and the pressing head 310, so as to ensure complete sealing of the detection box 100 while fixing the mechanical seal 400. Further, the seal 230 may be a sealing ring or gland disposed around the inner wall surface of the seal support 200.

Further, the fastening member 330 is a fastening nut, which can provide a strong fastening force. Of course, in other embodiments, other fasteners 330, such as fastening plugs, etc., may be used, and are not limited thereto.

In some embodiments, the lower end face of the ram 310 is shape-matched to and conforms to the top end face of the mechanical seal 400. Specifically, because the lower terminal surface of pressure head 310 with the top end face shape matching of mechanical seal 400 and laminating in the top end face of mechanical seal 400 has great area of contact with mechanical seal 400 to it is more firm to mechanical seal 400's fixed, avoids unexpected pine to take off, guarantees to detect safe in utilization.

In some embodiments, the sealing cap 110 is detachably disposed on the inspection box 100.

In this embodiment, the detachable sealing cover 110 facilitates the assembly and disassembly of the mechanical off-line detection assembly 10, and when the component is damaged, the corresponding component is directly replaced, so that the cost can be saved.

Further, a sealing structure 113 is provided between an end surface of the sealing cover 110 facing the detection chamber 100 and the detection chamber 100. Specifically, the sealing structure 113 can prevent the detection medium in the detection box 100 from overflowing between the detection box 100 and the sealing cover 110, thereby ensuring complete sealing of the detection box 100 while fixing the mechanical seal 400. Further, the sealing structure 113 may employ a sealing ring.

Referring to fig. 1, in some embodiments, the sealing cover 110 includes a cover body and a first sealing gasket 112 disposed on a surface of the cover body.

In this embodiment, the first sealing gasket 112 may enhance the sealing and supporting effect of the sealing cover 110 on the first end surface 410, and may effectively reduce the probability of the detection medium overflowing from between the sealing cover 110 and the first end surface 410.

Referring to fig. 1, in some embodiments, the sealing support 200 includes a support body 210 and a second gasket 220 disposed on a surface of the support body 210.

In this embodiment, the second gasket 220 may enhance the sealing support effect of the sealing support 200 on the second end face 420, and may effectively reduce the probability of the detection medium overflowing from between the sealing support 200 and the second end face 420.

As shown in fig. 2, in another embodiment of the present invention, an off-line detecting system for mechanical seal is provided, which includes an air source 20, a main circuit 30, a detecting circuit 40 and the off-line detecting assembly 10 for mechanical seal connected in sequence, wherein the main circuit 30 is provided with a main switch 31, the detecting circuit 40 is provided with a detecting switch 41 and a first pressure measuring device 42, and the other end of the detecting circuit 40 is connected to a communication hole 120 of the off-line detecting assembly 10 for mechanical seal.

The specific operation process comprises the following steps: (1) closing the main switch 31 and the detection switch 41;

(2) after the gas source 20 is opened, the compressed gas enters the main loop 30, when the pressure in the main loop 30 reaches a preset value (slightly greater than a detection pressure value), the detection switch 41 is opened, then the main switch 31 is slowly opened, the compressed gas can enter the mechanical seal offline detection assembly 10, and when the first pressure measurement device 42 reaches the detection pressure value such as 25Psi, the main switch 31 is closed;

(3) continuously observing the first pressure measurement device 42, and if the pressure indication number of the first pressure measurement device 42 is reduced by not more than 2Psi after 300 seconds, indicating that the mechanical sealing element 400 has good sealing performance and qualified pressure detection; if the drop exceeds the standard, the sealing performance of the mechanical sealing element 400 is unqualified, and the mechanical sealing element 400 needs to be overhauled or replaced;

(4) after the detection is finished, the air source 20 is closed, the main switch 31 and the detection switch 41 are opened, and the pressure of the system is exhausted.

In this embodiment, since the detection switch 41 is turned on first and then the main switch 31 is turned on slowly, the gas with a relatively high pressure in the main circuit 30 can be prevented from directly entering the detection circuit 40 to damage the detection circuit; the main switch 31 is slowly opened to gradually increase the pressure of the detection circuit 40 to just reach the detection pressure value, and the first pressure measurement device 42 is observed to detect and judge whether the sealing performance of the mechanical seal 400 is qualified.

Referring to fig. 2, in some embodiments, a pressure relief line 50 is further included and connected to the main circuit 30, and a pressure relief valve 51 is disposed on the pressure relief line 50, wherein the pressure relief valve 51 can be opened to relieve pressure of the mechanical seal offline detection assembly 10. Specifically, the pressure relief valve 51 is closed before detection, after detection is completed, the air source 20 is closed, the main switch 31 and the detection switch 41 are opened, and meanwhile, the pressure relief valve 51 is opened, so that air can enter the pressure relief pipeline 50 and be rapidly exhausted. The pressure relief pipeline 50 and the pressure relief valve 51 can promote the system to relieve pressure quickly, and the detection efficiency is improved.

Referring to fig. 2, in some embodiments, a filter pressure reducing valve 32 and a second pressure measuring device 33 are further included, and are disposed in the main circuit 30, and the filter pressure reducing valve 32 and the second pressure measuring device 33 are located between the gas source 20 and the main switch 31. Specifically, after the main switch 31 and the detection switch 41 are closed, the air source 20 and the filtering and pressure reducing valve 32 are opened, the air can flow through the filtering and pressure reducing valve 32, the second pressure measuring device 33 is observed, when the second pressure measuring device 33 shows that the pressure in the main circuit 30 reaches a preset value, for example, 30Psi, the detection switch 41 can be opened, and then the main switch 31 is slowly opened to inflate the mechanical seal offline detection assembly 10. In this embodiment, the pressure of the air in the main circuit 30 can be adjusted by the filter pressure reducing valve 32, so as to prevent the main circuit 30 from being damaged by excessive air pressure, and prevent the mechanical seal off-line detection assembly 10 from being damaged by excessive pressure directly entering the detection circuit 40.

Further, the air source 20 is a compressed air source 20. Low cost and no harm to human body. Of course, in other embodiments, other types of gas sources 20 may be used, and are not limited herein.

The utility model discloses in a further embodiment, a detect car is provided, it is equipped with foretell mechanical seal off-line detecting system on the car to detect.

The mobile detection vehicle can move the mechanical seal off-line detection system to a required position to detect at will, so that the mechanical seal 400 is prevented from being carried, the use flexibility is stronger, the practicability is better, and the technical popularization and implementation are facilitated.

In the above description, although it is possible to describe each element of the present invention using expressions such as "first" and "second", they are not intended to limit the corresponding elements. For example, the above expressions are not intended to limit the order or importance of the corresponding elements. The above expressions are used to distinguish one element from another.

The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Singular references include plural references unless there is a significant difference in context, scheme or the like between them.

The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention, which is defined by the appended claims.

Those skilled in the art will appreciate that various features of the above-described embodiments may be omitted, added, or combined in any way, and for the sake of brevity, all possible combinations of features of the above-described embodiments will not be described, however, so long as there is no contradiction between these combinations of features, and simple variations and structural variations which are adaptive and functional to the prior art, which can occur to those skilled in the art, should be considered within the scope of this description.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that while the invention has been shown and described with reference to various embodiments, it will be understood by those skilled in the art that various changes and modifications in form and detail may be made without departing from the spirit of the invention and these are within the scope of the invention as defined by the appended claims. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. An off-line mechanical seal detection assembly, comprising:

2. The mechanical seal offline inspection assembly of claim 1, wherein a height of said seal support is adjustable.

3. The off-line mechanical seal detection assembly of claim 2, wherein a retractable support is disposed inside the detection box, two ends of the retractable support along a length direction respectively abut against a bottom plate surface of the detection box and a lower surface of the seal support, and the retractable support is retractable in length so as to adjust a height of the seal support.

4. The mechanical seal offline inspection assembly of claim 1, wherein said stationary component comprises:

5. The mechanical seal off-line detection assembly according to claim 4, wherein the connecting rod includes a screw rod and a fixing seat connected to each other, the fixing seat is disposed inside the detection box and penetrates through the seal support, one end of the screw rod is connected to the fixing seat, and the other end of the screw rod penetrates through the mechanical seal and the pressure head and is exposed out of the upper end surface of the pressure head.

6. The mechanical seal off-line detection assembly of claim 5, wherein a seal is disposed between the fixed seat and the seal support.

7. The mechanical seal off-line detection assembly of claim 4, wherein the lower end face of the ram is form-fit to and conforms to the top end face of the mechanical seal.

8. The mechanical seal off-line detection assembly according to claim 1, wherein the sealing cover is detachably disposed on the detection box, and a sealing structure is disposed between an end surface of the sealing cover facing the detection box and the detection box.

9. The mechanical seal offline inspection assembly of claim 1, wherein said sealing cover comprises a cover and a first gasket disposed on a surface of said cover.

10. The mechanical seal offline inspection assembly of claim 1, wherein said seal support comprises a support body and a second seal disposed on a surface of said support body.

11. An off-line detection system for mechanical seal, which is characterized by comprising an air source, a main loop, a detection loop and the off-line detection assembly for mechanical seal as claimed in any one of claims 1 to 10, which are connected in sequence, wherein the main loop is provided with a main switch, the detection loop is provided with a detection switch and a first pressure measurement device, and the other end of the detection loop is connected to a communication hole of the off-line detection assembly for mechanical seal.

12. The offline mechanical seal detection system according to claim 11, further comprising a pressure relief pipeline connected to said main circuit, wherein a pressure relief valve is disposed on said pressure relief pipeline, and said pressure relief valve can be opened to relieve pressure of said offline mechanical seal detection assembly.

13. The mechanical seal off-line detection system of claim 11, further comprising a filter pressure relief valve and a second pressure measurement device disposed in the main circuit, wherein the filter pressure relief valve and the second pressure measurement device are located between the air source and the main switch.

14. An inspection vehicle, characterized in that the inspection vehicle is provided with an off-line inspection system for mechanical seals according to any one of claims 10 to 13.