CN210799335U - High temperature stuffing box sealing gasket leakage detection structure - Google Patents
High temperature stuffing box sealing gasket leakage detection structure Download PDFInfo
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- CN210799335U CN210799335U CN201921743614.3U CN201921743614U CN210799335U CN 210799335 U CN210799335 U CN 210799335U CN 201921743614 U CN201921743614 U CN 201921743614U CN 210799335 U CN210799335 U CN 210799335U
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- sinking platform
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Abstract
The utility model relates to a high-temperature stuffing box sealing gasket leakage detection structure, which comprises a pump head and a plunger, wherein a high-pressure cavity is arranged in the pump head, the pump head is also connected with a stuffing box, the plunger passes through the stuffing box, and the front end of the plunger extends into the high-pressure cavity; the pump head is provided with a coaxial two-stage sinking platform which comprises a first stage sinking platform and a second stage sinking platform; one end of the stuffing box corresponds to the first-stage sinking platform and is arranged in the first-stage sinking platform, a pressure taking gap is formed between the end face of the end and the bottom surface of the first-stage sinking platform, a sealing boss is arranged on the end face of the end, and the free end of the sealing boss is abutted to the bottom surface of the second-stage sinking platform through a sealing gasket; a pressure measuring interface is arranged on the pump head or the stuffing box and is connected with a pressure measuring device through the pressure measuring interface; the pressure measuring device is communicated with the pressure measuring gap and used for detecting the pressure at the gap position so as to judge whether the position of the sealing gasket leaks. The utility model can lead the user to find the use leakage condition of the sealing gasket in time, thereby taking measures in time to avoid safety accidents; the structure is reliable, and the suitability is strong.
Description
Technical Field
The utility model belongs to the technical field of pump in the liquid varactor formula machinery, concretely relates to sealed pad leak hunting structure of high temperature stuffing box.
Background
In a conventional reciprocating pump, a plurality of cross heads and plungers are connected through a crankshaft in a driving mode, one end of a transmission case body of the reciprocating pump is connected with parts such as a crankshaft of a driving part, and the other end of the transmission case body of the reciprocating pump is connected with a stuffing box and a pump head; the plunger piston penetrates through the stuffing box and penetrates into the high-pressure cavity of the pump head, the plunger piston is driven by the crankshaft to reciprocate, the pressure in the high-pressure cavity can be changed at the front end of the plunger piston, and pumping operation of a pump inlet and a pump outlet which are communicated with the high-pressure cavity on the pump head is correspondingly realized.
The stuffing box 3 can play a role in reducing the leakage of the pressure medium at the position where the plunger 2 movably penetrates, but the static sealing position where the stuffing box 3 abuts against the pump head 1 through the sealing gasket 5 has the possibility of leakage (see the attached drawing 1), especially when the pumping medium is a high-temperature medium, on one hand, the high temperature of the high-pressure cavity 13 and the alternating load of the movement of the plunger 2 easily cause the failure of the sealing gasket 5, and in addition, the leakage of the high-temperature medium under the pressure correspondingly easily causes serious safety accidents.
Disclosure of Invention
The above-mentioned not enough to prior art, the to-be-solved technical problem of the utility model is to provide a sealed structure of leaking hunting of packing box of high temperature, avoid the sealed pad position between packing box and the pump head to leak and the inconvenient problem of in time discovering to avoid the incident that probably causes, gain and be convenient for judge whether the sealed effect of having appeared leaking of packing box sealed pad.
In order to solve the technical problem, the utility model adopts the following technical scheme:
the high-temperature stuffing box sealing gasket leakage detection structure comprises a pump head and a plunger, wherein a high-pressure cavity is formed in the pump head, the pump head is also connected with a stuffing box, and the plunger penetrates through the stuffing box and the front end of the plunger extends into the high-pressure cavity; the pump head is provided with a coaxial two-stage sinking platform, and the two-stage sinking platform comprises a first-stage sinking platform and a second-stage sinking platform; one end of the stuffing box corresponds to the first-stage sinking platform and is arranged in the first-stage sinking platform, a pressure taking gap is formed between the end face of the end and the bottom surface of the first-stage sinking platform, a sealing boss corresponding to the second-stage sinking platform is convexly arranged on the end face of the end, and the free end of the sealing boss is abutted to the bottom surface of the second-stage sinking platform through a sealing gasket; the plunger penetrates through the bottom surface of the second-stage sinking platform and then extends into the high-pressure cavity;
a pressure measuring interface is arranged on the pump head or the stuffing box and is connected with a pressure measuring device through the pressure measuring interface; the pressure measuring device is communicated with the pressure measuring gap and used for detecting the pressure of the gap position so as to judge whether the position of the sealing pad leaks.
Further perfecting the above technical scheme, when the pressure measuring interface is arranged on the pump head, the pressure measuring interface is communicated with the pressure measuring gap through a pressure measuring channel in the pump head;
when the pressure measuring interface is arranged on the stuffing box, the pressure measuring interface is communicated with the pressure measuring gap through a pressure measuring channel in the stuffing box, and the pressure measuring interface is positioned on the outer surface of the part of the stuffing box outside the first-stage sinking platform.
Furthermore, a ring of ring grooves are formed in the outer side face of one end, installed in the first-stage sinking platform, of the stuffing box, the ring grooves are matched with the inner wall of the first-stage sinking platform to form a cooling ring cavity, and a cooling water inlet flow channel and a cooling water outlet flow channel which are communicated with the cooling ring cavity are formed in the pump head respectively.
Furthermore, O-shaped sealing rings are respectively arranged on the two sides of the cooling ring cavity and between the inner wall of the first-stage sinking platform and the stuffing box.
Furthermore, a pressing plate is pressed at the other end of the stuffing box, and a plurality of pressing bolts penetrate through the pressing plate and are connected to the pump head; the plunger penetrates through the pressure plate.
Further, a packing sealing assembly is arranged between the inner wall of the through hole on the stuffing box, through which the plunger passes, and the plunger.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. the utility model discloses a sealed structure of leaking hunting that fills up of high temperature gland box, the heavy platform of two-stage has been set up, when the free end of sealed boss is through the bottom surface looks butt of sealed pad with the heavy platform of second level, keep getting between the bottom surface of gland box and the heavy platform of first level and press the clearance, the bottom surface butt that both can guarantee sealed boss and the heavy platform of second level is firm, utilize this clearance to be used for getting to press the pressure measurement simultaneously again, through the sealed effect of external pressure measurement device control sealing pad, can in time discover sealed the sealed leakage condition of filling up, thereby in time take corresponding processing measure to avoid the incident.
2. The utility model discloses a setting of cooling ring chamber, the too high problem of temperature of plunger and stuffing box when can avoiding using further ensures the sealed life who fills up, guarantees sealed effect.
3. The utility model discloses a structure is reliable, and the suitability is strong, can suitably reform transform on the current product of part and form, and the implementation cost is low.
Drawings
FIG. 1-schematic view of the improved pre-structure mentioned in the background;
FIG. 2 is a schematic structural diagram of a high-temperature stuffing box sealing gasket leakage detection structure according to a first embodiment;
FIG. 3 is a schematic structural view of a high-temperature stuffing box sealing gasket leakage detection structure according to a second embodiment;
the device comprises a pump head 1, a first-stage sinking platform 11, a second-stage sinking platform 12, a high-pressure cavity 13, a plunger 2, a packing box 3, a sealing boss 31, a cooling ring cavity 32, an O-shaped sealing ring 33, a pressure taking gap 4, a sealing gasket 5, a pressure measuring interface 6, a pressing plate 7, a pressing bolt 71, a packing sealing component 8 and a sealing and pressing device 9.
Detailed Description
The following describes the present invention in further detail with reference to the accompanying drawings.
Example one
Referring to fig. 2, the high-temperature stuffing box sealing gasket leakage detecting structure of the first embodiment includes a pump head 1 and a plunger 2, a high-pressure chamber 13 is provided in the pump head 1, a stuffing box 3 is further connected to the pump head 1, and the plunger 2 passes through a through hole in the stuffing box 3 and its front end extends into the high-pressure chamber 13; the pump head 1 is provided with a coaxial two-stage sinking platform (also called a counter bore), the two-stage sinking platform comprises a first-stage sinking platform 11 and a second-stage sinking platform 12 which is arranged on the bottom surface of the first-stage sinking platform 11 and has a diameter smaller than that of the first-stage sinking platform 11, and the bottom surface of the second-stage sinking platform 12 is communicated with a high-pressure cavity 13; one end of the stuffing box 3 corresponds to the first-stage sinking platform 11 and is arranged in the first-stage sinking platform 11, a pressure taking gap 4 is arranged between the end surface of the end and the bottom surface of the first-stage sinking platform 11, a sealing boss 31 corresponding to the second-stage sinking platform 12 is convexly arranged on the end surface of the end, and the free end of the sealing boss 31 is abutted against the bottom surface of the second-stage sinking platform 12 through a sealing gasket 5; the plunger 2 penetrates through the bottom surface of the second-stage sinking platform 12 and then extends into the high-pressure cavity 13; in this embodiment, the high pressure cavity 13 is a high pressure channel corresponding to (slightly larger than) the plunger 2, the diameter of the high pressure channel is smaller than that of the second stage sinking platform 12, and the high pressure channel, the plunger 2, the first stage sinking platform 11, the second stage sinking platform 12 and the sealing boss 31 are all coaxially arranged. A pressure measuring interface 6 is arranged on the pump head 1 and is connected with a pressure measuring device (not shown in the figure) through the pressure measuring interface 6; the pressure measuring device is communicated with the pressure measuring gap 4 through a pressure measuring interface 6 and a pressure measuring channel in the pump head 1 so as to detect the pressure at the gap position and judge whether the position of the sealing gasket 5 leaks. The pressure measuring device can be a pressure detecting instrument such as a pressure gauge, a pressure switch, a pressure transmitter and the like.
The sealing gasket leakage detection structure comprises a two-stage sinking platform, the free end of a sealing boss 31 is abutted to the bottom surface of a second-stage sinking platform 12 through a sealing gasket 5, a pressure taking gap 4 is kept between a stuffing box 3 and the bottom surface of a first-stage sinking platform 11, the necessary condition that the sealing boss 31 is firmly abutted to the bottom surface of the second-stage sinking platform 12 through the sealing gasket 5 is guaranteed, meanwhile, the gap is used for pressure taking and pressure measurement, and the sealing effect of the sealing gasket 5 is monitored through an external pressure measuring device. When the sealing gasket 5 leaks, the interlocking control can be displayed on site or remotely transmitted, and corresponding treatment measures can be taken in time. During the use, pressure measurement device instruction is the zero pressure under the normal condition, and the instruction is just greater than the zero pressure when leaking the emergence, and specific indicating value how much is decided according to the condition of leaking, and the pressure indicating value that leaks the volume is big more, nevertheless can not exceed the design pressure of pump, so can correspond according to the outlet pressure of pump and select when selecting the manometer.
Wherein, the outer side surface of one end of the stuffing box 3 arranged in the first-stage sinking platform 11 is provided with a ring of ring grooves and is matched with the inner wall of the first-stage sinking platform 11 to form a cooling ring cavity 32, and the pump head 1 is provided with a cooling water inlet flow passage and a cooling water outlet flow passage (not shown in the figure) which are respectively communicated with the cooling ring cavity 32.
Like this, during the use, through the external circulative cooling medium that lets in of cooling water inlet flow way and play water flow way, when can avoiding using, the temperature of plunger 2 and gland packing 3 is too high, further ensures the life of sealed pad 5, guarantees sealed effect.
Wherein, on both sides of the cooling ring cavity 32, an O-ring 33 is respectively arranged between the inner wall of the first-stage sinking platform 11 and the stuffing box 3.
Thus, although the stuffing box 3 is in close contact with the inner wall of the first stage sinkers 11 and the pressure of the circulating cooling medium in the cooling ring chamber 32 is much lower than that in the higher pressure chamber 13, the O-ring 33 is designed to further prevent leakage of the cooling medium.
The embodiment also provides a concrete form that the stuffing box 3 is pressed and abutted on the pump head 1, the other end of the stuffing box 3 is pressed and connected with the pressure plate 7, the pressure plate 7 passes through and is connected with the pump head 1 through a plurality of (usually four) pressure bolts 71 (corresponding to four corners of the pressure plate), the corresponding pressure is transmitted to the stuffing box 3, and the abutting between the sealing boss 31 and the bottom surface of the second-stage sinking platform 12 is ensured to be firm; it will be appreciated that the plunger 2 also passes through the platen 7. And a packing sealing assembly 8, a sealing and pressing device 9 and the like are arranged between the inner wall of the through hole for the plunger 2 to penetrate through on the stuffing box 3 and the plunger 2, so that the tightness of the movable penetrating position is ensured.
Example two
Referring to fig. 3, the difference between the second embodiment and the first embodiment is that the pressure measuring port 6 is provided on the stuffing box 3, but not on the pump head 1, and correspondingly, the pressure measuring port 6 is communicated with the pressure measuring gap 4 through a pressure measuring channel in the stuffing box 3, and is located on the outer side of the stuffing box part outside the first-stage sinking platform 11, so as to facilitate connection of the pressure measuring device and observation, and the pressure measuring port 6 should be located on the outer side of the stuffing box part outside the first-stage sinking platform 11.
Through the sealing gasket leakage detecting structure of the second embodiment, the above effects can be obtained as well, and the description is omitted here.
Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.
Claims (6)
1. The high-temperature stuffing box sealing gasket leakage detection structure comprises a pump head and a plunger, wherein a high-pressure cavity is formed in the pump head, the pump head is also connected with a stuffing box, and the plunger penetrates through the stuffing box and the front end of the plunger extends into the high-pressure cavity; the method is characterized in that: the pump head is provided with a coaxial two-stage sinking platform, and the two-stage sinking platform comprises a first-stage sinking platform and a second-stage sinking platform; one end of the stuffing box corresponds to the first-stage sinking platform and is arranged in the first-stage sinking platform, a pressure taking gap is formed between the end face of the end and the bottom surface of the first-stage sinking platform, a sealing boss corresponding to the second-stage sinking platform is convexly arranged on the end face of the end, and the free end of the sealing boss is abutted to the bottom surface of the second-stage sinking platform through a sealing gasket; the plunger penetrates through the bottom surface of the second-stage sinking platform and then extends into the high-pressure cavity;
a pressure measuring interface is arranged on the pump head or the stuffing box and is connected with a pressure measuring device through the pressure measuring interface; the pressure measuring device is communicated with the pressure measuring gap and used for detecting the pressure of the gap position so as to judge whether the position of the sealing pad leaks.
2. The high temperature stuffing box sealing gasket leak hunting structure of claim 1, wherein: when the pressure measuring interface is arranged on the pump head, the pressure measuring interface is communicated with the pressure measuring gap through a pressure measuring channel in the pump head;
when the pressure measuring interface is arranged on the stuffing box, the pressure measuring interface is communicated with the pressure measuring gap through a pressure measuring channel in the stuffing box, and the pressure measuring interface is positioned on the outer surface of the part of the stuffing box outside the first-stage sinking platform.
3. The high temperature stuffing box sealing gasket leak hunting structure of claim 1, wherein: the packing box is provided with a ring groove on the outer side surface of one end of the packing box in the first-stage sinking platform and is matched with the inner wall of the first-stage sinking platform to form a cooling ring cavity, and the pump head is provided with a cooling water inlet flow channel and a cooling water outlet flow channel which are respectively communicated with the cooling ring cavity.
4. The high temperature stuffing box sealing gasket leak hunting structure of claim 3, wherein: o-shaped sealing rings are respectively arranged on the two sides of the cooling ring cavity and between the inner wall of the first-stage sinking platform and the stuffing box.
5. A high temperature stuffing box sealing gasket leak hunting structure according to any of claims 1 to 4 wherein: the other end of the stuffing box is in press connection with a pressing plate, and a plurality of compression bolts penetrate through the pressing plate and are connected to the pump head; the plunger penetrates through the pressure plate.
6. The high temperature stuffing box sealing gasket leak hunting structure of claim 5, wherein: and a packing sealing assembly is arranged between the inner wall of the through hole for the plunger to pass through on the stuffing box and the plunger.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921743614.3U CN210799335U (en) | 2019-10-17 | 2019-10-17 | High temperature stuffing box sealing gasket leakage detection structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921743614.3U CN210799335U (en) | 2019-10-17 | 2019-10-17 | High temperature stuffing box sealing gasket leakage detection structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112431752A (en) * | 2020-11-30 | 2021-03-02 | 华中科技大学 | High-pressure large-scale clearance dynamic sealing performance testing device and system |
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- 2019-10-17 CN CN201921743614.3U patent/CN210799335U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112431752A (en) * | 2020-11-30 | 2021-03-02 | 华中科技大学 | High-pressure large-scale clearance dynamic sealing performance testing device and system |
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