CN220319986U - Driving device for testing low-temperature tightness of valve rod packing - Google Patents
Driving device for testing low-temperature tightness of valve rod packing Download PDFInfo
- Publication number
- CN220319986U CN220319986U CN202322340467.8U CN202322340467U CN220319986U CN 220319986 U CN220319986 U CN 220319986U CN 202322340467 U CN202322340467 U CN 202322340467U CN 220319986 U CN220319986 U CN 220319986U
- Authority
- CN
- China
- Prior art keywords
- piston
- packing
- cavity
- valve rod
- valve
- 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.)
- Active
Links
- 238000012856 packing Methods 0.000 title claims abstract description 51
- 238000012360 testing method Methods 0.000 title claims abstract description 22
- 230000008878 coupling Effects 0.000 claims abstract description 3
- 238000010168 coupling process Methods 0.000 claims abstract description 3
- 238000005859 coupling reaction Methods 0.000 claims abstract description 3
- 230000001276 controlling effect Effects 0.000 claims description 9
- 239000007789 gas Substances 0.000 claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 239000000945 filler Substances 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 description 13
- 238000001514 detection method Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
Landscapes
- Details Of Valves (AREA)
Abstract
The utility model provides a valve rod packing low temperature is drive arrangement for leakproofness test adopts the piston drive arrangement including piston cylinder, piston and piston rod, the piston is located the inner chamber of piston cylinder, and piston and left end stretch into the piston rod left end fixed connection in the piston cylinder, the piston rod right-hand member passes through the shaft coupling and is connected with the valve rod left end, the left end and the upper right end of piston cylinder are equipped with the joint that are located the piston left and right sides respectively and communicate with piston cylinder inner chamber, and two joints communicate with high-pressure air supply through two air supply branch pipes respectively, and under the control of the alternating control subassembly that is used for alternately controlling two air supply branch pipes break-make with the air supply branch connection, realize that the piston rod drives the valve rod reciprocating motion in the stuffing box. The utility model provides stable and reliable driving conditions for testing the valve rod and the packing under different temperature conditions, and has the advantages of simple structure, stable and reliable operation and controllable reciprocating motion stroke.
Description
Technical Field
The utility model belongs to the technical field of valve packing detection, and particularly relates to a driving device for testing low-temperature tightness of valve rod packing.
Background
In the whole machine, the sealing element is only a small part, but the safety, reliability and durability of the machine equipment are all determined by the sealing element, the effect of the sealing element on the whole machine, the whole device and even the whole factory is very great, the sealing element is used for the industrial production of the detachable machine equipment which is contacted with the fluid, and leakage problems exist between the parts which are isolated from the outside and have relative movement. For valves, the packing is the seal, and therefore detection of the packing sealing performance is particularly important. At present, a set of experimental devices capable of detecting the sealing performance of the filler under different working conditions is needed, and therefore, improvement is needed.
Disclosure of Invention
The utility model solves the technical problems that: the driving device for testing the low-temperature tightness of the valve rod packing is provided, and comprises a piston, a piston rod and an alternating control assembly for controlling the reciprocating motion of the piston rod to drive the valve rod connected with the piston rod to reciprocate in a packing box, so that the detection of the sealing performance between the valve rod and the packing is realized, stable and reliable driving conditions are provided for testing the valve rod and the packing under different temperature conditions, the structure is simple, the operation is stable and reliable, the reciprocating motion stroke is controllable, and the use value is higher.
The utility model adopts the technical scheme that: the driving device for the valve rod packing low-temperature tightness test comprises a piston driving device which is connected with a valve rod and used for driving the valve rod to reciprocate in a cavity of a packing box, wherein the piston driving device comprises a piston cylinder, a piston and a piston rod, the piston is positioned in an inner cavity of the piston cylinder, the piston is fixedly connected with the left end of the piston rod, the left end of the piston rod extends into the piston cylinder, the right end of the piston rod is connected with the left end of the valve rod through a coupler, the left end and the right end of the piston cylinder are provided with connectors which are respectively positioned on the left side and the right side of the piston and are communicated with the inner cavity of the piston cylinder, and the two connectors are respectively communicated with a high-pressure air source through two air source branch pipes and are controlled by an alternate control assembly which is connected with the air source branch pipes and used for alternately controlling the on-off of the two air source branch pipes, so that the piston rod drives the valve rod to reciprocate in the packing box.
The alternating control assembly comprises a two-position three-way electromagnetic valve and a time relay KT1, wherein a P port of the two-position three-way electromagnetic valve is communicated with a main air inlet pipe provided with a pressure regulating valve, an A port and a B port of the two-position three-way electromagnetic valve are respectively communicated with two air source branch pipes, the two-position three-way electromagnetic valve is connected with the time relay KT1 in series, and the time relay KT1 is communicated with a control power supply through a power switch.
Further, the coil of the time relay KT1 is connected in series with a normally open contact KT 1-1.
Further, the cavity comprises a packing cavity, a connecting hole and a gas cavity which are coaxially communicated from left to right in sequence and are arranged in the packing box, the diameter of the gas cavity is larger than that of the packing cavity, the right end of the valve rod penetrates through the packing cavity and the connecting hole to be inserted into the gas cavity, and packing is filled between the inner wall of the packing cavity and the valve rod.
Further, an air inlet hole and an air leakage hole which are communicated with the inside of the air cavity are formed in the right end face of the packing box, the air inlet hole is communicated with a nitrogen air source through a pipeline provided with a one-way valve, and the air leakage hole is plugged by a plug arranged at the orifice of the air leakage hole.
Further, a pressure thermometer for measuring the temperature and the pressure in the cavity is arranged on the stuffing box.
Further, the stuffing box is supported on the bottom plate through two vertical plates, and a piston cylinder coaxially arranged with the stuffing box is supported on the bottom plate through an L-shaped plate.
Compared with the prior art, the utility model has the advantages that:
1. according to the technical scheme, the reciprocating motion of the valve rod connected with the piston rod in the stuffing box is driven by adopting the alternating control assembly comprising the piston, the piston rod and the piston rod for controlling the reciprocating motion of the piston rod, so that the detection of the sealing performance between the valve rod and the stuffing is realized, stable and reliable driving conditions are provided for the test of the valve rod and the stuffing under different temperature conditions, and the requirement of the detection of the sealing performance of the stuffing is met;
2. according to the technical scheme, the time relay is adopted to control the on-off of the electrified state of the two-position three-way electromagnetic valve, so that the reciprocating alternating control of the air inlet/air outlet of the two air source branch pipes on the piston cylinder is realized, the condition is provided for the reciprocating motion of the piston rod, the control of the reciprocating motion of the piston rod is realized by controlling the time length of the air inlet/air outlet, and the sealing performance test requirement between the piston rod and the filler under different travel requirements of the valve rod is met;
3. the technical scheme has the advantages of simple structure, stable and reliable operation, controllable reciprocating motion stroke, high precision and higher use value.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic diagram of an alternate control assembly of the present utility model.
Detailed Description
The technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to fig. 1-2 of the embodiments of the present utility model, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation. The inclusion of an element as defined by the phrase "comprising one does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.
The driving device for the low-temperature tightness test of the valve rod packing comprises a piston driving device which is connected with the valve rod 2 and is used for driving the valve rod 2 to reciprocate in a cavity 3 of the packing box 1, wherein the piston driving device comprises a piston cylinder 5, a piston 7 and a piston rod 13, the piston 7 is positioned in the cavity of the piston cylinder 5, the piston 7 is fixedly connected with the left end of the piston rod 13 of which the left end stretches into the piston cylinder 5, the right end of the piston rod 13 is connected with the left end of the valve rod 2 through a coupling 12, the left end and the right upper end of the piston cylinder 5 are provided with connectors 8 which are respectively positioned at the left side and the right side of the piston 7 and are communicated with the cavity of the piston cylinder 5, and the two connectors 8 are respectively communicated with a high-pressure air source through two air source branch pipes and realize that the piston rod 13 drives the valve rod 2 to reciprocate in the packing box 1 under the control of an alternate control assembly which is connected with the air source branch pipes and is used for alternately controlling the on-off of the two air source branch pipes; in the structure, the valve rod 2 connected with the piston rod 13 is driven to reciprocate in the stuffing box 1 by adopting the piston 2, the piston rod 13 and an alternating control component for controlling the reciprocation of the piston rod 13, so that the detection of the sealing performance between the valve rod 2 and the stuffing 4 is realized, stable and reliable driving conditions are provided for the test of the valve rod 2 and the stuffing 4 under different temperature conditions, and the requirement of the detection of the stuffing sealing performance is met;
the specific structure of the alternating control assembly is as follows: the alternating control assembly comprises a two-position three-way electromagnetic valve 6 and a time relay KT1, wherein a P port of the two-position three-way electromagnetic valve 6 is communicated with a main air inlet pipe provided with a pressure regulating valve, an A port and a B port of the two-position three-way electromagnetic valve 6 are respectively communicated with two air source branch pipes, the two-position three-way electromagnetic valve 6 is connected with the time relay KT1 in series, and the time relay KT1 is communicated with a control power supply through a power switch 18; specifically, a coil of the time relay KT1 is connected in series with a normally open contact KT 1-1; in the structure, the time relay KT1 is adopted to control the on-off of the electrified state of the two-position three-way electromagnetic valve 6, so that the reciprocating alternating control of the air inlet/air outlet of the two air source branch pipes on the piston cylinder 5 is realized, the condition is provided for the reciprocating motion of the piston rod 13, the control of the reciprocating motion of the piston rod 13 is realized by controlling the time length of the air inlet/air outlet, and the sealing performance test requirement between the valve rod 2 and the filler 4 under different travel requirements is met; the time relay KT1 is used for controlling the power on and off of the two-position three-way electromagnetic valve 6, the on time and the off time can be set through buttons on a panel of the time relay KT1, before the work, the power switch 18 is turned on, after the coil of the time relay KT1 is electrified, the normally open contact KT1-1 is closed, at the moment, after the coil of the two-position three-way electromagnetic valve 6 is electrified, the opening A is disconnected and the opening B is connected, after the on time reaches the set time, the coil of the time relay KT1 is powered off, the normally open contact KT1-1 is disconnected, at the moment, after the coil of the two-position three-way electromagnetic valve 6 is powered off, the opening A is connected and the opening B is disconnected, so that the reciprocating motion control of the piston 7 is repeated.
The cavity 3 has the following specific shape: the cavity 3 comprises a packing cavity 3-1, a connecting hole 3-2 and a gas cavity 3-3 which are coaxially communicated from left to right and are arranged in the packing box 1 in sequence, the diameter of the gas cavity 3-3 is larger than that of the packing cavity 3-1, the right end of the valve rod 2 penetrates through the packing cavity 3-1 and the connecting hole 3-2 to be inserted into the gas cavity 3-3, packing 4 is filled between the inner wall of the packing cavity 3-1 and the valve rod 2, the diameter of the packing cavity 3-1 is larger than that of the connecting hole 3-2, a positioning step formed by the packing cavity 3-1 and the connecting hole 3-2 provides positioning conditions for the packing 4, and the packing 4 is pressed into the packing cavity 3-1 by a gland 6, so that the reliability of the position of the packing 4 in the reciprocating motion process of the valve rod 2 is ensured;
the right end face of the stuffing box 1 is provided with an air inlet hole 14 and an air leakage hole 9 which are communicated with the inside of the air cavity 3-3, the air inlet hole 14 is communicated with a nitrogen air source through a pipeline provided with a one-way valve 10, and a plug 11 arranged at the orifice of the air leakage hole 9 seals the air leakage hole 9; the stuffing box 1 is provided with a pressure thermometer for measuring the temperature and the pressure in the cavity 3; the testing device is used for guaranteeing the safety and reliability of testing work; the arrangement of the pressure thermometer can grasp the temperature and pressure inside the stuffing box 1 in real time, the precision and the safety of the test temperature can be ensured, and meanwhile, the required temperature and pressure are provided for the test and detection data are provided;
the stuffing box 1 is supported on a bottom plate 16 through two vertical plates 15, and a piston cylinder 5 coaxially arranged with the stuffing box 1 is supported on the bottom plate 16 through an L-shaped plate 17.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (7)
1. Valve rod filler low temperature is drive arrangement for leakproofness test, its characterized in that: including being connected and being used for driving valve rod (2) reciprocating motion's piston drive arrangement in cavity (3) of packing box (1) with valve rod (2), piston drive arrangement includes piston cylinder (5), piston (7) and piston rod (13), piston (7) are arranged in the inner chamber of piston cylinder (5), and piston (7) and left end stretch into piston rod (13) left end fixed connection in piston cylinder (5), piston rod (13) right-hand member is connected with valve rod (2) left end through shaft coupling (12), the left end and the upper right end of piston cylinder (5) are equipped with respectively be located piston (7) left and right sides and with joint (8) of piston cylinder (5) inner chamber intercommunication, and two joints (8) are connected with high pressure air supply through two air supply branch pipes respectively to under the control of the alternating control subassembly that is used for controlling the break-make with the air supply branch pipe in turn, realize that piston rod (13) drive valve rod (2) reciprocating motion in packing box (1).
2. The valve stem packing low temperature tightness test driving device according to claim 1, wherein: the alternating control assembly comprises a two-position three-way electromagnetic valve (6) and a time relay KT1, wherein a P port of the two-position three-way electromagnetic valve (6) is communicated with a main air inlet pipe provided with a pressure regulating valve, an A port and a B port of the two-position three-way electromagnetic valve (6) are respectively communicated with two air source branch pipes, the two-position three-way electromagnetic valve (6) is connected with the time relay KT1 in series, and the time relay KT1 is communicated with a control power supply through a power switch (18).
3. The valve stem packing low temperature tightness test driving device according to claim 2, wherein: the coil of the time relay KT1 is connected in series with a normally open contact KT 1-1.
4. The drive device for low-temperature tightness test of valve stem packing according to claim 1, 2 or 3, wherein: the cavity (3) comprises a packing cavity (3-1), a connecting hole (3-2) and a gas cavity (3-3) which are coaxially communicated from left to right and are arranged in the packing box (1), the diameter of the gas cavity (3-3) is larger than that of the packing cavity (3-1), the right end of the valve rod (2) penetrates through the packing cavity (3-1) and the connecting hole (3-2) to be inserted into the gas cavity (3-3), and the packing (4) is filled between the inner wall of the packing cavity (3-1) and the valve rod (2).
5. The valve stem packing low temperature tightness test driving device according to claim 4, wherein: an air inlet hole (14) and an air leakage hole (9) which are communicated with the inside of the air cavity (3-3) are formed in the right end face of the stuffing box (1), the air inlet hole (14) is communicated with a nitrogen air source through a pipeline provided with a one-way valve (10), and a plug (11) arranged at the orifice of the air leakage hole (9) plugs the air leakage hole (9).
6. The valve stem packing low temperature tightness test driving device according to claim 5, wherein: and a pressure thermometer for measuring the internal temperature and pressure of the cavity (3) is arranged on the stuffing box (1).
7. The valve stem packing low temperature tightness test driving device according to claim 6, wherein: the stuffing box (1) is supported on the bottom plate (16) through two vertical plates (15), and the piston cylinder (5) coaxially arranged with the stuffing box (1) is supported on the bottom plate (16) through an L-shaped plate (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322340467.8U CN220319986U (en) | 2023-08-30 | 2023-08-30 | Driving device for testing low-temperature tightness of valve rod packing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322340467.8U CN220319986U (en) | 2023-08-30 | 2023-08-30 | Driving device for testing low-temperature tightness of valve rod packing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220319986U true CN220319986U (en) | 2024-01-09 |
Family
ID=89422581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322340467.8U Active CN220319986U (en) | 2023-08-30 | 2023-08-30 | Driving device for testing low-temperature tightness of valve rod packing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220319986U (en) |
-
2023
- 2023-08-30 CN CN202322340467.8U patent/CN220319986U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN210375687U (en) | Detection apparatus for simulation deep sea environment reciprocating motion sealing washer sealing performance | |
| RU2005127182A (en) | CONTROL DRIVE VALVE FOR CONTROL UNDERGROUND FLOWS | |
| CN110608878B (en) | Detection apparatus for simulation deep sea environment rotary motion sealing washer sealing performance | |
| CN102720843A (en) | Large-diameter proportional pneumatic valve directly driven by alternating-current servo motor | |
| CN220319986U (en) | Driving device for testing low-temperature tightness of valve rod packing | |
| CN105675221A (en) | System and method for measuring low-temperature sealing specific pressure performance parameters of sealing material | |
| CN106276806A (en) | A kind of device for producing oxygen from chemical substance | |
| CN111504701A (en) | Ultrahigh pressure simulation experiment system of fidelity coring device | |
| CN220230823U (en) | Valve rod filler low-temperature tightness testing device | |
| CN108775992B (en) | Simple multifunctional pneumatic valve leakage detection device and leakage detection method | |
| CN209014222U (en) | A kind of anhydrous work seal detection device of gate valve | |
| CN2807448Y (en) | Minitype pressure controller | |
| US20100051716A1 (en) | Automated switch for liquid additive injection pump | |
| CN110657980B (en) | Oil well head packing sealing performance test system | |
| CN110617959A (en) | Detection apparatus for simulation deep sea environment reciprocating motion sealing washer sealing performance | |
| CN205605932U (en) | Two isolated tee bend reversing solenoid valve | |
| CN202946714U (en) | Pneumatic diaphragm valve | |
| CN202790804U (en) | Mechanical electrically operated valve | |
| CN212159140U (en) | Two oil sources of pushing away pressurization experimental apparatus | |
| CN201310681Y (en) | Vacuum pneumatic baffle charging valve | |
| CN212299527U (en) | Motor drive four-way reversing valve and carbon dioxide refrigerating and heating system | |
| CN221221470U (en) | High-temperature high-pressure regulating valve | |
| CN209067918U (en) | A kind of balanced type two-port valve | |
| CN208595996U (en) | Pressure gauge quick coupling device | |
| CN204988662U (en) | Butterfly valve gas tightness can measuring equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |