CN220230823U - Valve rod filler low-temperature tightness testing device - Google Patents
Valve rod filler low-temperature tightness testing device Download PDFInfo
- Publication number
- CN220230823U CN220230823U CN202322340453.6U CN202322340453U CN220230823U CN 220230823 U CN220230823 U CN 220230823U CN 202322340453 U CN202322340453 U CN 202322340453U CN 220230823 U CN220230823 U CN 220230823U
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- valve rod
- packing
- cavity
- piston
- box
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- 238000012360 testing method Methods 0.000 title claims abstract description 29
- 239000000945 filler Substances 0.000 title description 6
- 238000012856 packing Methods 0.000 claims abstract description 65
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 11
- 210000004907 gland Anatomy 0.000 claims abstract description 5
- 229910001873 dinitrogen Inorganic materials 0.000 claims abstract 2
- 238000003780 insertion Methods 0.000 claims abstract 2
- 230000037431 insertion Effects 0.000 claims abstract 2
- 239000007789 gas Substances 0.000 claims description 9
- 238000007789 sealing Methods 0.000 abstract description 10
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 7
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
Landscapes
- Sealing Devices (AREA)
Abstract
The utility model provides a valve rod packing low temperature tightness testing arrangement, including packing box and right-hand member cartridge in the valve rod in the cavity of packing box, it has the packing to fill between the inner wall of cavity left half and the valve rod, and the gland is fixed in on the packing box left end face and is used for the packing of lid pressure valve rod insertion end, nitrogen gas fills in the cavity through the inlet port that packing box right-hand member and cavity communicate, the valve rod left end passes through the shaft coupling and is connected with piston drive arrangement's piston rod end, and by piston reciprocating motion device drive valve rod reciprocating motion in the packing box. The utility model adopts the stuffing box with the internal stuffing and the valve rod being matched and the nitrogen being introduced into the valve rod, provides the valve rod with a structure working under different temperature conditions, and drives the valve rod to reciprocate in the stuffing box by the piston driving device connected with the valve rod, thereby realizing the tightness test between the valve rod stuffing under different temperature conditions, having simple test structure and controllable reciprocating movement stroke of the valve rod, and meeting the tightness test requirements of different stroke requirements under different sealing temperatures.
Description
Technical Field
The utility model belongs to the technical field of valve packing detection, and particularly relates to a valve rod packing low-temperature tightness testing device.
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 detachable machine equipment which is in contact with the fluid in industrial production, the leakage problem exists between the parts which are isolated from the outside and have relative motion, and the sealing element is used as the packing for the valve, so the detection of the sealing performance of the packing 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 low-temperature tightness testing device for the valve rod filler adopts a structure that internal filler is matched with the valve rod and nitrogen can be introduced into the valve rod, so that the valve rod is provided with working under different temperature conditions, and a piston driving device connected with the valve rod drives the valve rod to reciprocate in the stuffing box, so that tightness testing among the valve rod fillers under different temperature conditions is realized.
The utility model adopts the technical scheme that: the valve rod packing low-temperature tightness testing device comprises a packing box and a valve rod, wherein the right end of the valve rod is inserted into a cavity of the packing box, packing is filled between the inner wall of the left half part of the cavity and the valve rod, a gland is fixed on the left end face of the packing box and used for covering packing at the inserting end of the valve rod, nitrogen is filled into the cavity through an air inlet hole communicated with the cavity through the right end of the packing box, and the left end of the valve rod is connected with the end part of a piston rod of a piston type driving device through a coupler and is driven by the piston type reciprocating device to reciprocate in the packing box.
The piston type driving device comprises a piston cylinder, a piston and a piston rod, wherein 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 and the right end of the piston cylinder are respectively positioned at the left side and the right side of the piston cylinder and are communicated with the inner cavity of the piston cylinder, the two connectors are respectively communicated with a high-pressure air source through two air source branch pipes, and the on-off state of the two air source branch pipes is alternately controlled, so that the piston rod drives the valve rod to reciprocate in 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.
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.
Compared with the prior art, the utility model has the advantages that:
1. according to the technical scheme, the stuffing box which is matched with the valve rod and can be filled with nitrogen is adopted, so that a structure which works under different temperature conditions is provided for the valve rod, the nitrogen is convenient to fill, the temperature and the pressure inside the stuffing box can be mastered in real time by setting the pressure thermometer, and the precision and the safety of the test temperature can be ensured;
2. according to the technical scheme, the piston type driving device connected with the valve rod drives the valve rod to reciprocate in the stuffing box, so that the tightness test of the valve rod under different temperature conditions among stuffing is realized, the test structure is simple, the reciprocating motion stroke of the valve rod is controllable, and the tightness test requirements of different stroke requirements under different sealing temperatures are met;
3. the technical scheme has the advantages of simple structure, convenient operation, high accuracy, low test cost, high safety and reliability and higher use value.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model.
Detailed Description
The technical solution in the embodiments of the present utility model will be clearly and completely described in the following with reference to fig. 1 in 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 valve rod packing low-temperature tightness testing device comprises a packing box 1 and a valve rod 2, wherein the right end of the valve rod 2 is inserted into a cavity 3 of the packing box 1, packing 4 is filled between the inner wall of the left half part of the cavity 3 and the valve rod 2, a gland 6 is fixed on the left end face of the packing box 1 and used for covering the packing 4 at the inserted end of the valve rod 2, nitrogen is filled into the cavity 3 through an air inlet hole 14 communicated with the cavity 3 at the right end of the packing box 1, and the left end of the valve rod 2 is connected with the end part of a piston rod 13 of a piston type driving device through a coupler 12 and is driven by the piston type reciprocating device to reciprocate in the packing box 1; in the structure, the stuffing box which is matched with the valve rod 2 by the internal stuffing 4 and can be used for introducing nitrogen into the valve rod is adopted, so that the valve rod is provided with a structure working under different temperature conditions, and the nitrogen is convenient to charge;
the piston type driving device has the following specific structure: the piston type driving device comprises a piston cylinder 5, a piston 7 and a piston rod 13, wherein the piston 7 is positioned in an inner 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 extends into the piston cylinder 5, joints 8 which are respectively positioned at the left side and the right side of the piston 7 and are communicated with the inner cavity of the piston cylinder 5 are arranged at the left end and the right upper end of the piston cylinder 5, the two joints 8 are respectively communicated with a high-pressure air source through two air source branch pipes, and the on-off state of the two air source branch pipes is alternately controlled to realize that the piston rod 13 drives a valve rod 2 to reciprocate in a stuffing box 1; in the structure, the piston type driving device connected with the valve rod 2 drives the valve rod to reciprocate in the stuffing box 1, so that the tightness test of the valve rod 2 under different temperature conditions is realized, the test structure is simple, the reciprocating motion stroke of the valve rod 2 is controllable, and the tightness test of different stroke requirements under different sealing temperatures is met; when the joint 8 at the left end of the piston cylinder 5 is in air and the joint 8 at the right upper end is out of air, the piston 7 drives the valve rod 2 to move right, otherwise, the piston 7 drives the valve rod 2 to move left, and the left or right stroke can be controlled by controlling the time of inflating in the corresponding joint 8, and the specific control can be controlled by adopting a two-position three-way electromagnetic valve and a time relay KT 1.
The supporting structure of the stuffing box 1 and the piston cylinder 5 is specifically as follows: the stuffing box 1 is supported on a bottom plate 16 by two vertical plates 15, and a piston cylinder 5 coaxially arranged with the stuffing box 1 is supported on the bottom plate 16 by an L-shaped plate 17.
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 and is inserted into the gas cavity 3-3, the packing 4 is filled between the inner wall of the packing cavity 3-1 and the valve rod 2, wherein 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, the packing 4 is pressed into the packing cavity 3-1 by the gland 6, and the reliability of the position of the packing 4 in the reciprocating motion process of the valve rod 2 is ensured;
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 seals the air leakage hole 9; specifically, the stuffing box 1 is provided with a pressure thermometer for measuring the temperature and the pressure in the cavity 3, so as to ensure the safety and the reliability of the test 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 technical scheme has the advantages of simple structure, convenient operation, high accuracy, low test cost, high safety and reliability and higher use value.
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 (6)
1. Valve rod packing low temperature tightness testing arrangement, including packing box (1) and right-hand member cartridge valve rod (2) in cavity (3) of packing box (1), it has packing (4) to fill between inner wall and the valve rod (2) of cavity (3) left half, and gland (6) are fixed in on packing box (1) left end face and are used for lid to press packing (4) of valve rod (2) insertion end, and in inlet port (14) that nitrogen gas was through packing box (1) right-hand member and cavity (3) intercommunication filled cavity (3), its characterized in that: the left end of the valve rod (2) is connected with the end part of a piston rod (13) of the piston type driving device through a coupler (12), and the valve rod (2) is driven by the piston type reciprocating device to reciprocate in the stuffing box (1).
2. The valve stem packing cryogenic tightness test device of claim 1, wherein: the piston type driving device comprises a piston cylinder (5), a piston (7) and a piston rod (13), wherein the piston (7) is located in an inner cavity of the piston cylinder (5), the piston (7) and the left end of the piston rod (13) extending into the piston cylinder (5) are fixedly connected, the left end and the right upper end of the piston cylinder (5) are provided with connectors (8) which are respectively located at the left side and the right side of the piston (7) and are communicated with the inner cavity of the piston cylinder (5), the two connectors (8) are respectively communicated with a high-pressure air source through two air source branch pipes, and the on-off states of the two air source branch pipes are alternately controlled, so that the piston rod (13) drives a valve rod (2) to reciprocate in a stuffing box (1).
3. The valve stem packing cryogenic tightness test device of claim 2, 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).
4. A valve stem packing cryogenic tightness test device according to claim 1 or 2 or 3, characterized in that: 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 cryogenic tightness test device of 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 cryogenic tightness test device of 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).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322340453.6U CN220230823U (en) | 2023-08-30 | 2023-08-30 | Valve rod filler low-temperature tightness testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322340453.6U CN220230823U (en) | 2023-08-30 | 2023-08-30 | Valve rod filler low-temperature tightness testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220230823U true CN220230823U (en) | 2023-12-22 |
Family
ID=89173076
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322340453.6U Active CN220230823U (en) | 2023-08-30 | 2023-08-30 | Valve rod filler low-temperature tightness testing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220230823U (en) |
-
2023
- 2023-08-30 CN CN202322340453.6U patent/CN220230823U/en active Active
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