CN114137174A - Pressure limiting device and steam-water system - Google Patents
Pressure limiting device and steam-water system Download PDFInfo
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- CN114137174A CN114137174A CN202210006362.6A CN202210006362A CN114137174A CN 114137174 A CN114137174 A CN 114137174A CN 202210006362 A CN202210006362 A CN 202210006362A CN 114137174 A CN114137174 A CN 114137174A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 18
- 239000000126 substance Substances 0.000 claims description 19
- 239000000428 dust Substances 0.000 claims description 6
- 238000009434 installation Methods 0.000 abstract description 22
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 abstract description 6
- 230000017525 heat dissipation Effects 0.000 description 9
- 238000012423 maintenance Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/18—Water
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
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Abstract
The application discloses voltage limiting device and soda system relates to power plant equipment technical field. The device comprises a device main body, wherein the device main body is provided with a first surface and a second surface, the first surface is connected with the second surface, the device main body is provided with a mounting groove and a through hole, the mounting groove is arranged on the first surface, the through hole is arranged on the second surface, and the through hole is communicated with the mounting groove; the access cover is detachably connected with the device main body and is provided with an installation part which is arranged in the installation groove; the operating piece is movably arranged in the device main body, and part of the operating piece is positioned in the through hole; the elastic limiting part is arranged on the mounting part, the elastic limiting part is arranged opposite to the operating part, and the elastic limiting part is in limiting fit with the inner wall of the through hole. The problem that the access cover of the existing pressure limiting device is inconvenient to disassemble and assemble can be solved by the scheme.
Description
Technical Field
The application belongs to the technical field of power plant equipment, and particularly relates to a pressure limiting device and a steam-water system.
Background
In the soda system of power plant, soda sample pressure relief device is used for taking a sample the soda that gets into online chemical instrumentation and carrying out the decompression, but because soda sample pressure relief device's performance is unstable, and undulant great, and online chemical instrumentation requires highly to the water pressure of soda sample, if the too high water pressure can cause online chemical instrumentation to damage, if the pressure crosses lowly can cause online chemical instrumentation to measure inaccurately, consequently only suitable water sample pressure can ensure that online chemical instrumentation can accurately measure quality of water data in real time.
In practical application, the pressure limiting device is arranged between the steam-water sampling pressure limiting device and the online chemical instrument to limit the pressure of the water sample after pressure reduction, so that a stable working environment is provided for the online chemical instrument. When the pressure limiting device breaks down and needs to be disassembled from the access cover to maintain the interior of the pressure limiting device, the disassembly and assembly structure of the access cover is complex, so that the pressure limiting device is inconvenient to disassemble, and the loss of the installation parts is easily caused, thereby influencing the later use of the pressure limiting device and further influencing the measurement accuracy of the online chemical instrument.
Disclosure of Invention
The embodiment of the application aims to provide a pressure limiting device and a steam-water system, and the problem that an access cover of the existing pressure limiting device is inconvenient to disassemble and assemble can be solved.
In order to solve the technical problem, the present application is implemented as follows:
in a first aspect, an embodiment of the present application provides a voltage limiting device, including:
the device comprises a device main body, a first side and a second side, wherein the first side is connected with the second side, the device main body is provided with a mounting groove and a through hole, the mounting groove is arranged on the first side, the through hole is arranged on the second side, and the through hole is communicated with the mounting groove;
the access cover is detachably connected with the device main body and is provided with an installation part which is arranged in the installation groove;
the operating piece is movably arranged in the device main body, and part of the operating piece is positioned in the through hole;
the elastic limiting part is arranged on the mounting part, the elastic limiting part is arranged opposite to the operating part, and the elastic limiting part is in limiting fit with the inner wall of the through hole.
In a second aspect, an embodiment of the present application provides a steam-water system, which includes an online chemical meter and a pressure limiting device, where the pressure limiting device is the above pressure limiting device, and the online chemical meter is connected to the pressure limiting device.
In the embodiment of the application, when the interior of the pressure limiting device needs to be overhauled, the elastic limiting piece is elastically deformed by pressing the operating piece, and when the elastic limiting piece is positioned in the mounting groove, namely the elastic limiting piece is positioned outside the through hole and is disengaged from the inner wall of the through hole, the access cover can be taken out at the moment, and the elastic limiting piece restores to be deformed; after the overhaul is completed, the elastic limiting part is manually pressed to enable the elastic limiting part to be elastically deformed again, then the installation part and the elastic limiting part are placed into the installation groove together, the elastic limiting part is opposite to the operation part, the through hole provides a containing space for the elastic limiting part to restore deformation, and after the elastic limiting part restores deformation, the elastic limiting part is in limit fit with the inner wall of the through hole, so that the assembly of the overhaul cover is completed. Therefore, the pressure limiting device disclosed by the application can take out the access cover only by pressing the operating piece, and in the assembly process, the installation part and the elastic limiting piece after deformation are only required to be put into the installation groove, so that the disassembly and the installation of the access cover of the pressure limiting device are simple, and the interior of the access cover is convenient to overhaul. Therefore, the problem that the access cover of the existing pressure limiting device is inconvenient to disassemble and assemble can be solved.
Drawings
Fig. 1 is a schematic structural diagram of a water sample pressure limiting device of an online chemical meter disclosed in an embodiment of the present application;
fig. 2 is an exploded view of a water sample pressure limiting device of an online chemical meter disclosed in the embodiment of the present application;
FIG. 3 is a cross-sectional view of a water sample pressure limiting device of an online chemical meter disclosed in an embodiment of the present application;
fig. 4 is a partial enlarged view of the structure a shown in fig. 3.
Description of reference numerals:
100-device body, 110-first face, 111-threaded mounting hole, 120-second face, 130-mounting groove;
200-access cover, 210-mounting part, 220 heat dissipation channel;
300-operating piece, 310-pressing part, 320-connecting part and 330-driving part;
400-elastic limiting piece, 410-elastic driving part, 420-limiting part and 430-guiding part;
500-a resilient connecting element;
600-dust screen;
700-a fastener;
800-base.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that embodiments of the application may be practiced in sequences other than those illustrated or described herein, and that the terms "first," "second," and the like are generally used herein in a generic sense and do not limit the number of terms, e.g., the first term can be one or more than one. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.
The following describes the voltage limiting device provided in the embodiments of the present application in detail through specific embodiments and application scenarios thereof with reference to the accompanying drawings.
As shown in fig. 1 to 4, an embodiment of the present application discloses a pressure limiting device, which includes a device body 100, an access cover 200, an operation member 300, and an elastic limiting member 400.
The device main body 100 is provided with an accommodating space which is mainly used for accommodating the pressure limiting structure, and optionally, the online chemical instrument can be arranged on the device main body 100 and connected with the pressure limiting structure to display the pressure value of the steam-water after pressure limiting, so that the operation condition of the steam-water system is supervised. The device main body 100 has a first surface 110 and a second surface 120, the first surface 110 is connected to the second surface 120, the device main body 100 has a mounting groove 130 and a through hole, the mounting groove 130 is disposed on the first surface 110, optionally, the online chemical meter can be disposed opposite to the first surface, the through hole is disposed on the second surface 120, and the through hole is communicated with the mounting groove 130. Alternatively, the mounting groove 130 may be disposed adjacent to an edge of the first face 110, thereby saving space for other structures within the device body 100.
The access cover 200 is mainly used to protect a pressure limiting structure and other components disposed in the accommodating space of the device main body 100, the access cover 200 is detachably connected to the device main body 100, the access cover 200 has a mounting portion 210, and the mounting portion 210 is disposed in the mounting groove 130. Optionally, the number of the mounting portions 210 may be at least two, and the mounting grooves 130 are arranged in one-to-one correspondence to the mounting portions 210, which is beneficial to improving the connection stability of the access cover 200 and the device main body 100.
The operation member 300 is movably provided to the apparatus main body 100, a part of the operation member 300 is located in the through hole, and the operation member 300 moves between a first position and a second position with respect to the apparatus main body 100.
The elastic limiting element 400 is disposed on the mounting portion 210, and optionally, the elastic limiting element 400 and the mounting portion 210 may be connected by a fixed connection manner such as welding, bonding, and the like, which is not limited in this application. The elastic limiting member 400 is disposed opposite to the operating member 300, and the elastic limiting member 400 is in limiting fit with the inner wall of the through hole, so that the access cover 200 is fixed to the device body 100.
Specifically, when the interior of the pressure limiting device needs to be overhauled, the elastic limiting member 400 is elastically deformed by pressing the operating member 300, and when the elastic limiting member 400 is located in the installation groove, that is, the elastic limiting member 400 is located outside the through hole and is disengaged from the inner wall of the through hole, the access cover 200 can be taken out at this time, and the elastic limiting member 400 is restored to be deformed; after the maintenance work is completed, the elastic limiting member 400 is manually pressed to be elastically deformed again, then the installation part 210 and the elastic limiting member 400 are placed into the installation groove 130 together, the elastic limiting member 400 is opposite to the operation member 300, the through hole provides an accommodation space for the elastic limiting member 400 to restore deformation, and after the elastic limiting member 400 restores deformation, the elastic limiting member 400 is in limit fit with the inner wall of the through hole, so that the assembly of the maintenance cover 200 is completed. Therefore, the pressure limiting device disclosed in the embodiment of the present application can take out the access cover 200 only by pressing the operation member 300, and only the installation portion 210 and the deformed elastic limiting member 400 need to be put into the installation groove 130 during assembly, and therefore, the access cover 200 of the pressure limiting device is easy to disassemble and install, and the interior of the access cover is convenient to overhaul. Therefore, the problem that the access cover 200 of the existing pressure limiting device is inconvenient to disassemble and assemble can be solved.
In an alternative embodiment, the operation member 300 includes a pressing portion 310 and a connecting portion 320, the pressing portion 310 is connected to the connecting portion 320, the pressing portion 310 is exposed relative to the apparatus main body 100, a portion of the connecting portion 320 is located in the through hole, the connecting portion 320 is opposite to the elastic limiting member 400, and the pressing portion 310 protrudes from a circumferential surface of the connecting portion 320, that is, a cross-sectional area of the pressing portion 310 is larger than a cross-sectional area of the connecting portion 320, so as to facilitate operation of a worker, and it should be noted that the cross-sectional area is an area of a cross-section perpendicular to a moving direction of the operation member 300. Alternatively, the cross-sectional area of the pressing portion 310 may be circular, square, triangular, polygonal, and the like, which is not particularly limited by the embodiment of the present application. In addition, since the cross-sectional area of the pressing portion 310 is larger than that of the connecting portion 320, the pressing portion 310 can be in limit fit with the apparatus main body 100 during pressing of the operating element 300, thereby limiting the movement of the operating element 300.
When the connecting portion 320 of the operating element 300 contacts with the inner wall of the through hole, friction exists between the connecting portion 320 and the inner wall of the through hole during the movement of the operating element 300, and a larger pressing force needs to be output to drive the operating element 300 to move when the operating element 300 is pressed. Optionally, the connecting portion 320 has a fitting gap with the inner wall of the through hole, so as to avoid a friction force between the connecting portion 320 and the inner wall of the through hole, which is beneficial for an operator to easily press the operating member 300 to move it.
In the process of pressing the operation element 300, the connection portion 320 abuts against the elastic limiting element 400, so that the elastic limiting element 400 deforms, but once an operator presses the edge of the pressing portion 310, the operation element 300 tilts, at this time, the end of the connection portion 320 makes line contact or point contact with the elastic limiting element 400, and the damping force of the elastic limiting element 400 acting on the connection portion 320 makes the elastic limiting element 400 difficult to deform; in addition, when the connecting portion 320 and the elastic limiting member 400 are in line contact or point contact, the operating element 300 may easily scratch the elastic limiting member 400. Therefore, optionally, the operation element 300 further includes a driving portion 330, the driving portion 330 is disposed on one side of the connecting portion 320 departing from the pressing portion 310, the driving portion 330 is of a hemispherical structure, that is, one side of the driving portion 330 opposite to the elastic limiting member 400 is an arc-shaped surface, when the operation element 300 is pressed, even if an operator presses the edge of the pressing portion 310, the operation element 300 is inclined, but the operation element 300 and the elastic limiting member 400 are always in surface contact, and the operation element 300 can still drive the elastic limiting member 400 to deform through the driving portion 330, so that the disassembling efficiency of the access cover 200 is improved, and the elastic limiting member 400 can be protected at the same time.
The operation member 300 and the apparatus body 100 may be connected by a chain to prevent the operation member 300 from being separated from the apparatus body 100, but the connection is made by a chain, and after the access cover 200 is taken out, the operation member 300 needs to be manually returned, or after the maintenance is completed, the access cover 200 and the elastic stopper 400 are installed in the installation groove, and the operation member 300 needs to be driven to return by the elastic stopper 400. Based on this, optionally, the pressure limiting device further includes an elastic connecting member 500, the elastic connecting member 500 is sleeved on the connecting portion 320, one end of the elastic connecting member 500 is connected with the pressing portion 310, the other end of the elastic connecting member 500 is connected with the device main body 100, on the basis of avoiding the loss of the operating member 300, after the access cover 200 is taken out, the elastic connecting member 500 can restore the deformation by means of the elastic force of the elastic connecting member 500, so as to drive the operating member 300 to move, the operating member 300 does not need to be driven to move manually or through the elastic limiting member 400, and the pressure limiting device is more convenient and labor-saving.
In an alternative embodiment, the elastic limiting member 400 includes an elastic driving portion 410, the elastic driving portion 410 is disposed on the mounting portion 210, the elastic driving portion 410 is in limiting fit with the inner wall of the through hole, at this time, the elastic driving portion 410 is in point contact with the inner wall of the through hole, and the elastic driving portion 410 is easily deformed after being stressed, which results in unstable limiting fit between the elastic driving portion 410 and the through hole. Based on this, optionally, the elastic limiting member 400 further includes a limiting portion 420, the elastic driving portion 410 is disposed between the limiting portion 420 and the mounting portion 210, the limiting portion 420 is disposed opposite to the operating member 300, and the limiting portion 420 is in limiting fit with the inner wall of the through hole, at this time, the limiting portion 420 is in surface contact with the inner wall of the through hole, the contact area is large, and the stability of limiting fit between the elastic limiting member 400 and the inner wall of the through hole is improved.
The quantity of elastic drive portion 410 can be a plurality of, in order to increase the tie point between elastic drive portion 410 and installation department 210 and spacing portion 420, thereby strengthen the spacing complex stability of inner wall of elastic locating part 400 and through-hole, however, after the maintenance is accomplished through manual pressing elastic locating part 400 and make its deformation, when elastic locating part 400 and installation department 210 install to the inside of mounting groove 130, a plurality of elastic drive portions 410 after this deformation misplace with the through-hole easily, lead to in the unable through-hole that gets into of spacing portion 420, will increase the installation degree of difficulty of access cover 200. Therefore, in a further alternative embodiment, the elastic limiting member 400 further includes a guiding portion 430, the guiding portion 430 is disposed between the limiting portion 420 and the mounting portion 210, the guiding portion 430 and the elastic driving portion 410 are disposed side by side, that is, the guiding portion 430 is combined with the elastic driving portion 410, at this time, the guiding portion 430 can play a guiding role for the deformation of the elastic driving portion 410, and can also provide a guide for the movement of the limiting portion 420, so as to improve the mounting efficiency of the access cover 200; it should be noted that the guiding portion 430 may be a telescopic rod, and during the deformation of the elastic driving portion 410, the length of the guiding portion 430 changes along with the change of the length of the elastic driving portion 410. In addition, since the rigidity of the guide portion 430 is greater than that of the elastic driving portion 410, the elastic limiting member 400 having such a structure can further improve the stability of the limiting engagement between the elastic limiting member 400 and the inner wall of the through hole.
The number of the guiding portions 430 may be multiple, so as to further improve the stability of the elastic limiting member 400, but when the elastic limiting member 400 and the mounting portion 210 are mounted inside the mounting groove 130, the through hole provides a space for the elastic driving portion 410 to recover deformation, and since the guiding portions 430 and the limiting portions 420 both need the elastic driving portion 410 to drive the movement thereof, and the number of the elastic driving portions 410 is small, the elastic driving portion 410 is easily damaged. Based on this, optionally, the number of the elastic driving portions 410 is at least two, including a first elastic driving portion and a second elastic driving portion, both the first elastic driving portion and the second elastic driving portion are disposed at the edge of the limiting portion 420, so as to further increase the connection points between the elastic driving portion 410 and the mounting portion 210 and the limiting portion 420, so that the plurality of elastic driving portions 410 act together to drive the limiting portion 420 and the guiding portion 430 to move, thereby protecting the elastic driving portion 410. Further, when the number of the elastic driving portions 410 is at least two, if the guiding portion 430 is disposed adjacent to the first elastic driving portion or the second elastic driving portion, the elastic limiting member 400 is easily dislocated from the through hole, so optionally, the guiding portion 430 is disposed at the central axis of the limiting portion 420, and the guiding portion 430 is disposed between the first elastic driving portion and the second elastic driving portion, thereby providing guidance for the plurality of elastic driving portions 410 to improve the installation efficiency of the access cover 200.
The access cover 200 of the pressure limiting device may be provided with a plurality of heat dissipation holes to dissipate heat generated inside the device body 100, but the heat dissipation holes have a small area and a low heat dissipation efficiency. Therefore, optionally, the access cover 200 is provided with the heat dissipation channel 220, so as to improve the heat dissipation efficiency, but impurities in the external environment easily enter the inside of the device main body 100 by dissipating heat through the heat dissipation channel 220; therefore, further optionally, the pressure limiting device further includes a dust screen 600, and the dust screen 600 is disposed in the heat dissipation channel 220, so as to achieve the purpose of dust prevention while satisfying the requirement of rapid heat dissipation, thereby protecting the structure disposed inside the device main body 100.
In an alternative embodiment, the access cover 200 is provided with a mounting hole, the mounting hole is disposed at an edge of the access cover 200, so that the mounting hole and the mounting portion 210 are arranged in a staggered manner, the first surface 110 is provided with a threaded mounting hole 111, the pressure limiting device further comprises a fastener 700, the fastener 700 is provided with a thread, and one end of the fastener 700 penetrates through the mounting hole to be in threaded fit with the threaded mounting hole 111, so that the access cover 200 is tightly connected with the device body 100, and the connection stability of the access cover 200 and the device body 100 is further improved.
Further alternatively, the number of the mounting holes may be multiple, the mounting holes are spaced apart, and the threaded mounting holes 111 and the fasteners 700 are disposed in one-to-one correspondence with the mounting holes, so as to further improve the firmness of the mounting of the access cover 200 to the device body 100.
In another alternative embodiment, the pressure limiting device further includes a base 800, and the device body 100 and the access cover 200 are both disposed on the base 800, so as to prevent the device body 100 and the access cover 200 from directly contacting the installation base, so as to protect the device body 100 and the access cover 200; in addition, the base 800 can increase the contact area between the device body 100 and the access cover 200 and the installation base, so that the whole pressure limiting device is more stable. Device main part 100 and base 800 fixed connection to play fixed effect to device main part 100, optionally, the two can adopt fixed connection modes such as bolted connection, and this application embodiment does not do specific restriction to this, and in addition, this base 800 sets up to the dismouting that access cover 200 provides the holding surface, thereby is favorable to improving access cover 200's dismouting efficiency.
Based on the pressure limiting device disclosed by the embodiment, the embodiment of the application also discloses a steam-water system, which comprises the online chemical instrument and the pressure limiting device, wherein the pressure limiting device is the pressure limiting device disclosed by any embodiment, and the online chemical instrument is connected with the pressure limiting device.
While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A pressure limiting device, comprising:
the device comprises a device main body (100), wherein the device main body (100) is provided with a first surface (110) and a second surface (120), the first surface (110) is connected with the second surface (120), the device main body (100) is provided with a mounting groove (130) and a through hole, the mounting groove (130) is arranged on the first surface (110), the through hole is arranged on the second surface (120), and the through hole is communicated with the mounting groove (130);
an access cover (200), the access cover (200) being detachably connected to the apparatus main body (100), the access cover (200) having a mounting portion (210), the mounting portion (210) being disposed in the mounting groove (130);
an operating member (300), wherein the operating member (300) is movably arranged on the device main body (100), and part of the operating member (300) is positioned in the through hole;
the elastic limiting piece (400), the elastic limiting piece (400) is arranged on the mounting portion (210), the elastic limiting piece (400) and the operating piece (300) are arranged oppositely, and the elastic limiting piece (400) is in limit fit with the inner wall of the through hole.
2. The pressure limiting device according to claim 1, wherein the operating member (300) includes a pressing portion (310) and a connecting portion (320), the pressing portion (310) is connected to the connecting portion (320), the pressing portion (310) is exposed with respect to the device body (100), a portion of the connecting portion (320) is located in the through hole, the connecting portion (320) is disposed opposite to the elastic limiting member (400), and the pressing portion (310) protrudes from a circumferential surface of the connecting portion (320).
3. The pressure limiting device according to claim 2, wherein the operating member (300) further comprises a driving portion (330), the driving portion (330) is disposed on a side of the connecting portion (320) facing away from the pressing portion (310), and the driving portion (330) has a hemispherical structure.
4. The pressure limiting device according to claim 2, further comprising an elastic connecting member (500), wherein the elastic connecting member (500) is sleeved on the connecting portion (320), one end of the elastic connecting member (500) is connected to the pressing portion (310), and the other end of the elastic connecting member (500) is connected to the device body (100).
5. The pressure limiting device according to claim 1, wherein the elastic limiting member (400) comprises an elastic driving portion (410) and a limiting portion (420), the elastic driving portion (410) is disposed between the limiting portion (420) and the mounting portion (210), the limiting portion (420) is disposed opposite to the operating member (300), and the limiting portion (420) is in limiting fit with an inner wall of the through hole.
6. The device according to claim 5, wherein the elastic limiting member (400) further comprises a guiding portion (430), the guiding portion (430) is disposed between the limiting portion (420) and the mounting portion (210), and the guiding portion (430) is disposed side by side with the elastic driving portion (410).
7. The pressure limiting device according to claim 6, wherein the guiding portion (430) is disposed at a central axis of the position limiting portion (420), the number of the elastic driving portions (410) is at least two, and the elastic driving portions include a first elastic driving portion and a second elastic driving portion, the first elastic driving portion and the second elastic driving portion are both disposed at an edge of the position limiting portion (420), and the guiding portion (430) is disposed between the first elastic driving portion and the second elastic driving portion.
8. The pressure limiting device of claim 1, wherein the access cover (200) defines a heat dissipating channel (220), the pressure limiting device further comprising a dust screen (600), the dust screen (600) being disposed in the heat dissipating channel (220).
9. The pressure limiting device of claim 1 wherein the access cover (200) defines a mounting hole disposed adjacent an edge of the access cover (200), the first face (110) defines a threaded mounting hole (111), the pressure limiting device further comprising a fastener (700), the fastener (700) defining a thread, one end of the fastener (700) passing through the mounting hole to threadedly engage the threaded mounting hole (111).
10. A steam-water system, characterized in that, it comprises an on-line chemical instrument and a pressure limiting device, the pressure limiting device is the pressure limiting device of any one of claims 1-9, the on-line chemical instrument is connected with the pressure limiting device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210006362.6A CN114137174A (en) | 2022-01-04 | 2022-01-04 | Pressure limiting device and steam-water system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210006362.6A CN114137174A (en) | 2022-01-04 | 2022-01-04 | Pressure limiting device and steam-water system |
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| CN114137174A true CN114137174A (en) | 2022-03-04 |
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| CN202210006362.6A Pending CN114137174A (en) | 2022-01-04 | 2022-01-04 | Pressure limiting device and steam-water system |
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| CN212874221U (en) * | 2020-08-11 | 2021-04-02 | 江苏鼎鑫电气有限公司 | Oil pointer device of oil-immersed transformer |
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