CN111610017A - Safety valve ejector rod mechanism and safety valve blockage test device - Google Patents
Safety valve ejector rod mechanism and safety valve blockage test device Download PDFInfo
- Publication number
- CN111610017A CN111610017A CN202010577742.6A CN202010577742A CN111610017A CN 111610017 A CN111610017 A CN 111610017A CN 202010577742 A CN202010577742 A CN 202010577742A CN 111610017 A CN111610017 A CN 111610017A
- Authority
- CN
- China
- Prior art keywords
- rod
- safety valve
- ejector
- sleeve
- support rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 20
- 230000000903 blocking effect Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/003—Machine valves
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Details Of Valves (AREA)
Abstract
The invention relates to a safety valve ejector rod mechanism, comprising: the ejector rod core bar comprises a head part and a support rod, and the head part is connected with one end of the support rod; the ejector rod sleeve rod is sleeved outside the support rod and can rotate relative to the support rod; the bearing is sleeved on the support rod and is positioned between the head of the ejector rod core rod and the ejector rod sleeve rod. A safety valve blockage test device comprises a torque wrench and a sleeve and further comprises a safety valve ejector rod mechanism. The invention can reduce the loss of force and reduce the torque when a blocking test is carried out, thereby using a torque wrench with smaller range, avoiding the damage of threads, avoiding the relative rotation of the contact surface of the ejector rod and the valve rod and reducing the damage of the contact surface of the valve rod.
Description
Technical Field
The invention relates to the field of safety valves, in particular to a safety valve ejector rod mechanism and a safety valve blockage test device.
Background
In the prior art, safety valves used in nuclear power are subjected to safety valve blockage tests in order to be normally used, a push rod device is required to be adopted for testing, and the existing safety valve push rod mechanism still has some problems.
The existing safety valve ejector rod mechanism comprises a core rod, wherein the lower end of the core rod is directly contacted with a valve rod, as shown in figure 1.
When the safety valve ejector rod mechanism is used for a blocking test, the valve rod needs to be jacked by the head of the core rod, and torque is applied to the ejector rod through the torque wrench, so that the downward force of the valve rod is increased, the pressure of a medium at the inlet of the safety valve is balanced, and the leakage of the valve is reduced. In the process of applying torque to a core rod, the core rod moves in a downward rotating mode, and in the process, the core rod is always in contact with a valve rod to cause the contact surface of the valve rod to be scratched; the friction of the core rod on the upper end face of the valve rod is large in the downward rotating process, a large-range torque wrench needs to be used, the stress of the rod part thread of the valve rod and the thread of the protective cover is large, and thread damage is easily caused, so that the traditional ejector rod is serious in loss and high in maintenance cost.
Disclosure of Invention
The invention aims to provide a safety valve ejector rod mechanism to reduce the problems of torque and damage of a threaded valve rod.
In order to achieve the purpose, the invention adopts the technical scheme that:
a safety valve ram mechanism comprising:
the ejector rod core bar comprises a head part and a support rod, and the head part is connected with one end of the support rod;
the ejector rod sleeve rod is sleeved outside the support rod and can rotate relative to the support rod;
the bearing is sleeved on the support rod and is positioned between the head of the ejector rod core rod and the ejector rod sleeve rod.
Preferably, the device further comprises a fastening component which is arranged at the other end of the supporting rod of the ejector rod core rod and is used for preventing the ejector rod sleeve rod from falling off from the supporting rod.
Further preferably, the fastening assembly comprises a first nut, the first nut is sleeved on the ejector rod core rod supporting rod and abuts against the ejector rod loop rod, the ejector rod core rod, the ejector rod loop rod and the bearing can be combined into a whole by the first nut, and reassembly and loss of the assembly during use are avoided.
Still further preferably, the fastening assembly further comprises a second nut, the second nut is sleeved on the ejector rod core rod supporting rod and abuts against the first nut, and the first nut can be prevented from loosening.
Preferably, the other end of the supporting rod extends out of the ejector rod sleeve rod, and the part of the extending section can be used for arranging a fastening assembly.
Preferably, the head of the ejector rod core rod and the support rod of the ejector rod core rod are both cylinders, and the head is superposed with the central line of the support rod.
Preferably, the bearing is a thrust ball bearing.
It is another object of the present invention to provide a safety valve plugging test device,
in order to achieve the purpose, the invention adopts the technical scheme that:
a safety valve blockage test device comprises a torque wrench and a sleeve and further comprises a safety valve ejector rod mechanism.
Preferably, in the use state: the sleeve is nested on the ejector rod sleeve rod.
Preferably, in the use state: the torque wrench is nested on the sleeve.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
the invention can reduce the loss of force and reduce the torque when a blocking test is carried out, thereby using a torque wrench with smaller range, avoiding the damage of threads, avoiding the relative rotation of the contact surface of the ejector rod and the valve rod and reducing the damage of the contact surface of the valve rod.
Drawings
FIG. 1 is a schematic structural diagram of a conventional safety valve blockage test device;
FIG. 2 is a schematic structural diagram of a safety valve ejector mechanism in the present embodiment;
FIG. 3 is a schematic structural diagram of a mandrel bar in this embodiment;
FIG. 4 is a schematic structural view of a bearing according to the present embodiment;
FIG. 5 is a schematic structural diagram of a top rod loop bar in the present embodiment;
FIG. 6 is a schematic structural diagram of a first nut in the present embodiment;
FIG. 7 is a schematic structural diagram of a second nut in the present embodiment;
fig. 8 is a schematic structural diagram of the safety valve clogging test apparatus in this embodiment.
In the above drawings: 1. a mandril core rod; 11. a head portion; 12. a support bar; 2. a mandril sleeve rod; 3. a bearing; 4. a fastening assembly; 41. a first nut; 42. a second nut; 5. a valve stem; 6. a torque wrench; 7. a sleeve; 8. a core bar; 9. a protective cover.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. 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 invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 2, a safety valve jack mechanism includes: the device comprises a mandril core rod 1, a mandril sleeve rod 2, a bearing 3, a fastening component 4 and the like.
As shown in fig. 3, the ejector pin core rod 1 comprises a head 11 and a support rod 12, the head 11 is fixed at one end of the support rod 12, the head 11 and the support rod 12 are both cylinders, the center lines of the head 11 and the support rod 12 are overlapped, and the head 11 contacts with a valve rod 55 and transmits the downward force of the ejector pin sleeve rod 2 to the valve rod 5.
As shown in fig. 5: ejector pin loop bar 2, 2 covers of ejector pin loop bar are established in the bracing piece 12 outsides, and ejector pin loop bar 2 can rotate relative to bracing piece 12 to the bracing piece 12 other end stretches out from ejector pin loop bar 2 for set up fastening components, ejector pin loop bar 2 turns into the moment of torsion spanner moment of torsion decurrent power and acts on bearing and head 11, thereby withstands valve rod 5.
As shown in fig. 4, the bearing 3 is sleeved on the support rod 12 and located between the head 11 of the ejector rod core rod and the ejector rod sleeve rod 2, the used bearing is a thrust ball bearing, the rotation downward movement of the ejector rod sleeve rod 2 is converted into the vertical downward movement of the head 11 of the ejector rod core rod, and the friction of the ejector rod sleeve rod 2 to the head 11 in the rotation descending process and the friction between the head 11 and the valve rod 5 are avoided.
As shown in fig. 1, 6 and 7, the fastening component 4 is disposed at the other end of the support rod 12, and is used for preventing the ejector rod loop bar 2 from falling off, including a first nut 41 and a second nut 42, the first nut 41 is disposed on the support rod 12 and supported on the ejector rod loop bar 2 through a threaded sleeve, the ejector rod core bar 1, the ejector rod loop bar 2 and the bearing 3 are combined into a whole, thereby avoiding the re-assembly and the loss of the components during use, the second nut 42 is disposed on the support rod 12 and supported on the first nut 41 through a threaded sleeve, and preventing the first nut 41 from loosening.
As shown in fig. 8, the safety valve blockage testing device comprises a torque wrench 6, a sleeve 7 and a safety valve ejector rod mechanism.
When conducting the plugging test: the sleeve 7 is nested on the ejector rod loop bar 2 and keeps relatively fixed, then the torque wrench 6 is clamped at the upper end of the sleeve 7, torque is applied to the sleeve 7 through the torque wrench 6, the sleeve 7 is rotated to drive the ejector rod loop bar 2 to rotate downwards, and the head 11 applies downward force to the valve rod 5 to perform a blocking test.
When the safety valve blockage test is carried out, the valve rod 5 is guaranteed to be subjected to the same force, the head 11 and the valve rod 5 are prevented from rotating, friction between the ejector rod sleeve rod 2 and the head 11 is reduced, force loss is reduced, torque is reduced, and thread damage and damage to each contact surface are avoided.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (10)
1. A safety valve ejector rod mechanism is characterized by comprising:
the ejector rod core bar comprises a head part and a support rod, and the head part is connected with one end of the support rod;
the ejector rod sleeve rod is sleeved outside the support rod and can rotate relative to the support rod;
the bearing is sleeved on the support rod and is positioned between the head of the ejector rod core rod and the ejector rod sleeve rod.
2. The safety valve ejector mechanism of claim 1, further comprising a fastening member provided at the other end of the support rod of the ejector core rod for preventing the ejector sleeve rod from falling off the support rod.
3. The safety valve stem lifter mechanism of claim 2, wherein the fastening assembly includes a first nut that fits over the stem bar support rod and abuts the stem bar sleeve rod.
4. The safety valve stem lifter mechanism of claim 3, wherein the fastening assembly further comprises a second nut that fits over the stem bar support rod and abuts the first nut.
5. The safety valve stem lifter mechanism of claim 1 or 2, wherein the other end of the support rod protrudes from the stem lifter bar.
6. The safety valve ejector mechanism of claim 1, wherein the head of the ejector pin core rod and the support rod of the ejector pin core rod are both cylindrical, and the head coincides with the center line of the support rod.
7. The safety valve stem lifter mechanism of claim 1, wherein the bearing is a thrust ball bearing.
8. A safety valve blockage test device comprises a torque wrench and a sleeve, and is characterized by further comprising a safety valve ejector rod mechanism according to any one of claims 1 to 7.
9. The safety valve plugging test device of claim 8, wherein in a use state: the sleeve is nested on the ejector rod sleeve rod.
10. The safety valve plugging test device of claim 9, wherein in a use state: the torque wrench is nested on the sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010577742.6A CN111610017B (en) | 2020-06-23 | 2020-06-23 | Safety valve ejector rod mechanism and safety valve blockage test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010577742.6A CN111610017B (en) | 2020-06-23 | 2020-06-23 | Safety valve ejector rod mechanism and safety valve blockage test device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111610017A true CN111610017A (en) | 2020-09-01 |
| CN111610017B CN111610017B (en) | 2024-07-12 |
Family
ID=72198926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010577742.6A Active CN111610017B (en) | 2020-06-23 | 2020-06-23 | Safety valve ejector rod mechanism and safety valve blockage test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111610017B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01124741A (en) * | 1987-11-10 | 1989-05-17 | Mitsubishi Heavy Ind Ltd | Testing device for safety valve operating pressure |
| US5548997A (en) * | 1991-09-03 | 1996-08-27 | Westinghouse Electric Corporation | Apparatus for applying a known axial force to a valve stem |
| CN205824298U (en) * | 2016-06-29 | 2016-12-21 | 上海阀门厂股份有限公司 | A kind of nuclear power main steam relief valve |
| CN210513684U (en) * | 2019-10-15 | 2020-05-12 | 石家庄环烃检测服务有限公司 | Novel online check-up of relief valve device |
| CN212059348U (en) * | 2020-06-23 | 2020-12-01 | 吴江市东吴机械有限责任公司 | Safety valve ejector rod mechanism and safety valve blockage test device |
-
2020
- 2020-06-23 CN CN202010577742.6A patent/CN111610017B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01124741A (en) * | 1987-11-10 | 1989-05-17 | Mitsubishi Heavy Ind Ltd | Testing device for safety valve operating pressure |
| US5548997A (en) * | 1991-09-03 | 1996-08-27 | Westinghouse Electric Corporation | Apparatus for applying a known axial force to a valve stem |
| CN205824298U (en) * | 2016-06-29 | 2016-12-21 | 上海阀门厂股份有限公司 | A kind of nuclear power main steam relief valve |
| CN210513684U (en) * | 2019-10-15 | 2020-05-12 | 石家庄环烃检测服务有限公司 | Novel online check-up of relief valve device |
| CN212059348U (en) * | 2020-06-23 | 2020-12-01 | 吴江市东吴机械有限责任公司 | Safety valve ejector rod mechanism and safety valve blockage test device |
Non-Patent Citations (1)
| Title |
|---|
| 臧恒波等: "安全阀结构分析与优化设计", 《阀门》, no. 05, 25 October 2010 (2010-10-25), pages 13 - 15 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111610017B (en) | 2024-07-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN212059348U (en) | Safety valve ejector rod mechanism and safety valve blockage test device | |
| CN108362574A (en) | Rock mechanics tests bearing system under high temperature and pressure multi- scenarios method | |
| CN111610017A (en) | Safety valve ejector rod mechanism and safety valve blockage test device | |
| US5468136A (en) | Clamping apparatus | |
| CN112525673A (en) | Self-centering anti-bending and anti-twisting high-temperature clamp bearing axial tensile load | |
| CN107471152A (en) | A kind of full-floating type round nut assembling and disassembling device | |
| CN108436819B (en) | Calibration device and calibration method for high-load bolt fastening machine tool | |
| CN112265931B (en) | Synchronous lifting device for corrugated pipe connector and load driving device | |
| CN111573613B (en) | Hydraulic quick connector suitable for automatic butt joint of marine loading and unloading arm | |
| CN214573916U (en) | Prestress compensation anchorage device with monitoring function applied to prestress anchor rod | |
| CN209910916U (en) | Top-mounted ball valve seat pre-tightening support and auxiliary inspection tool | |
| CN209903113U (en) | Flashboard clamping device for nuclear power plant | |
| CN206362476U (en) | A kind of output torque test device of actuator switching mechanism | |
| CN208155757U (en) | Rock mechanics tests bearing system under high temperature and pressure multi- scenarios method | |
| CN216359548U (en) | Extracting tool that relief valve blockked up | |
| CN211761167U (en) | Framework oil seal dismounting device | |
| CN112338865A (en) | Force unloading device for pneumatic valve maintenance | |
| CN214171311U (en) | End cover mechanism for cavity | |
| CN211975856U (en) | Self-tightening sealing structure of top cover of high-pressure container | |
| CN218973821U (en) | Check connecting device for threaded safety valve | |
| CN221296035U (en) | Safety detection device for hydraulic lifter | |
| CN221443068U (en) | Safety bolt structure of press machine | |
| CN112628454B (en) | Actuating mechanism anti-rotation structure of regulating valve | |
| CN221762754U (en) | Split valve rod nut | |
| CN215065728U (en) | Fixing device for pressure sensor for steel rail static load test |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |