CN213286908U - Elliptical flow prop plug burette with emergency flow stopping device - Google Patents
Elliptical flow prop plug burette with emergency flow stopping device Download PDFInfo
- Publication number
- CN213286908U CN213286908U CN201920164241.8U CN201920164241U CN213286908U CN 213286908 U CN213286908 U CN 213286908U CN 201920164241 U CN201920164241 U CN 201920164241U CN 213286908 U CN213286908 U CN 213286908U
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- Prior art keywords
- piston
- flow
- burette
- oval
- straight
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- Expired - Fee Related
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- 239000007788 liquid Substances 0.000 claims abstract description 14
- 238000003825 pressing Methods 0.000 claims description 25
- 238000007789 sealing Methods 0.000 claims description 22
- 230000006835 compression Effects 0.000 claims description 13
- 238000007906 compression Methods 0.000 claims description 13
- 230000000149 penetrating effect Effects 0.000 claims description 11
- 229940099259 vaseline Drugs 0.000 claims description 11
- 230000001105 regulatory effect Effects 0.000 claims description 10
- 230000001276 controlling effect Effects 0.000 claims description 3
- 238000011065 in-situ storage Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 238000004448 titration Methods 0.000 abstract description 6
- 235000017166 Bambusa arundinacea Nutrition 0.000 abstract 1
- 235000017491 Bambusa tulda Nutrition 0.000 abstract 1
- 241001330002 Bambuseae Species 0.000 abstract 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 abstract 1
- 239000011425 bamboo Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 5
- 230000000903 blocking effect Effects 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
Images
Abstract
The utility model discloses a take oval flow property of urgent current stopping device to fill up buret, including the governing valve that control buret opened, closed liquid, the governing valve includes the piston bush of tube-shape and shaft-like straight-through piston, and the section of thick bamboo wall of piston bush is equipped with a pair of perforation along its radially running through, and the runner hole is oval, and its oval major axis length is not more than buret and the final drain pipe's of buret internal diameter, and still is equipped with along its axial in straight-through piston and can remove and will in straight-through piston the only flow member that the runner hole blockked up completely, only flow member includes the depression bar, the depression bar inserts in straight-through piston, the end of damming of depression bar when the depression bar inwards removes will the runner hole blocks up, when the depression bar outwards removes, the runner hole is opened. The burette flow control is flexible, the flow stopping of the burette can be realized in time, the operation is convenient, and the titration function is stable and reliable.
Description
Technical Field
The utility model belongs to the technical field of the buret, especially, relate to an utensil stopper buret of urgent flow stopping device in area.
Background
The existing plug burette generally comprises a burette, a regulating valve and a liquid outlet pipe from top to bottom in sequence, wherein the regulating valve comprises a cylindrical piston sleeve and a through piston, the burette mainly plays a metering role of the burette, the cylinder wall of the piston sleeve is provided with a pair of coaxially arranged through holes for liquid to flow through along the radial direction of the cylinder wall, the through hole at the upper part is connected with the bottom end port of the burette, the through hole at the lower part is connected with the inlet end of the liquid outlet pipe, the through piston is axially inserted into the piston sleeve and is rotatably arranged in the piston sleeve, the part of the through piston inserted into the piston sleeve is provided with a flow passage hole, and the flow passage hole is gradually aligned and communicated with two opposite through holes at the top and the. The current straight piston with a plug burette generally adopts a perfect circular flow liquid channel, so that the straight piston is longer in twist distance, the piston needs to twist more than 50 degrees to complete the flow stopping operation when the liquid dropping is stopped, the quick flow stopping operation when the titration end point is reached is not facilitated, the titration is extremely easy to be excessive, great experimental errors are caused, and even the experiment fails, so that the convenience and the controllability of the titration operation are influenced. Although the existing burette is provided with a diamond-shaped liquid flow channel, the diamond shape is inconvenient to process, the edge of the diamond shape is easy to concentrate stress to cause defects, so that the adjusting performance is damaged, and the friction is larger when the port of the diamond-shaped flow channel is contacted with the inner wall of the burette.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to solve above-mentioned technical problem, provide an oval stream property that takes urgent current termination device and fill up buret, this buret flow control is nimble, can in time realize the current termination of buret, and the operation is convenient, titrates the stable and reliable function.
The technical scheme of the utility model as follows:
an elliptic flow prop plug burette with an emergency flow stopping device comprises a regulating valve for controlling the opening and closing of the burette, wherein the regulating valve comprises a cylindrical piston sleeve and a rod-shaped through piston, the cylinder wall of the piston sleeve is provided with a pair of through holes along the radial direction in a penetrating way, one end of the through piston is inserted into the piston sleeve and can be rotatably arranged in the piston sleeve, the part of the through piston inserted into the piston sleeve is provided with a flow passage hole, and the upper and lower ports of the flow passage hole are respectively communicated with the two through holes on the cylinder wall of the piston sleeve and finally completely aligned when the through piston is rotated;
the flow passage hole is oval, the length of the long axis of the oval is not more than the inner diameters of the burette and the final liquid outlet pipe of the burette, a flow stopping rod piece which can move in the through piston and completely blocks the flow passage hole is further arranged in the through piston along the axial direction of the through piston, the flow stopping rod piece comprises a pressing rod, the pressing rod is inserted into the through piston, the flow passage hole is blocked by the cut-off end of the pressing rod when the pressing rod moves inwards, and the flow passage hole is opened when the pressing rod moves outwards.
Furthermore, the compression bar is of a cylindrical rod-shaped structure, the compression bar is inserted into the through piston from the outer end face of the through piston to a threaded joint, a sealing ring is arranged on the end face of the threaded joint, a threaded cap is screwed on the threaded joint end in a bottle cap screwing structure mode and extrudes the sealing ring, and an expansion end convenient for being grabbed and pulled by hand is arranged at one end of the compression bar, penetrating through the threaded cap and extending out after penetrating through the sealing ring.
Furthermore, vaseline is further coated on the sealing ring, and a felt ring used for wiping off the vaseline on the compression rod is filled in the compression rod through the hole wall of the through hole in the threaded cover.
Furthermore, the cut-off end of the pressure lever is of an isosceles trapezoid wedge block structure, two waist parts of the cut-off end intersect with the flow passage hole in a penetrating mode to seal the flow passage hole, and the small end face of the cut-off end is arranged towards the bottom of the jack hole in the straight-through piston for the pressure lever to be inserted.
Furthermore, the intercepting end is made of wear-resistant sealing rubber, and two bottom edges of the intercepting end are respectively and oppositely located in the concave cavity at the bottom of the jack hole and the jack.
Furthermore, one side of the pressure lever, which is close to the handheld end of the pressure lever, is provided with a plurality of scale marks, and the scale marks are arranged along the length direction of the pressure lever.
Furthermore, the straight-through piston is inserted into the piston sleeve and is in threaded connection with the piston sleeve, when the straight-through piston is screwed to the bottom, the flow passage hole is communicated with the two through holes to form a maximum flow passage, and when the straight-through piston is screwed out to a position where a step on the end face of the threaded section of the straight-through piston is in contact with a limiting step in the piston sleeve, the flow passage hole is completely closed.
Further, the through piston is self-rotating in situ within the piston sleeve.
Furthermore, a circle of scale marks are arranged at the disc-shaped holding part close to the free end of the through piston, and a protrusion is further arranged on the end face, facing the holding part, of the piston sleeve and can be aligned with the scale marks when the through piston rotates.
The utility model has the advantages that: the middle part of the straight-through piston of the burette is provided with the emergency flow stopping device (namely the flow stopping rod piece), the internal structure of the burette with the plug is improved, the function of emergency flow stopping is achieved, the titration operation is easier to control, the achievement rate, the accuracy and the precision of the titration analysis method can be greatly improved, and the working efficiency is improved. Meanwhile, in order to reduce the pressure stroke of the pressure lever and reduce the difficulty of flow stopping operation, a classical circular flow channel is improved into an elliptical flow channel, stress concentration is avoided after elliptical holes are machined, the strength is high, and the contact of the orifice edge is smoother; the burette is directly connected with a piston and is provided with a leakage-proof device which consists of a screw head, a screw cap and a deformable rubber leakage-proof gasket (a sealing ring); the thread head is invaginated to contain a deformable sealing ring; when the screw cap is screwed down, the deformable rubber leakage-proof washer is pressed on, so that the deformable rubber leakage-proof washer deforms and extends, and the leakage-proof effect is achieved. The utility model discloses a vaseline is paintd to flexible rubber leak protection packing ring, further prevents the weeping.
Drawings
Fig. 1 is a front view of the present invention.
Fig. 2 is a front view of the regulating valve of the present invention.
Fig. 3 is a top view of the regulating valve of the present invention.
Fig. 4 is an exploded view of the structure shown in fig. 2.
Fig. 5 and 6 are partial cross-sectional views of the regulator valve of the present invention in the axial direction thereof.
Fig. 7 is a schematic view of a partial structure of the present invention at the holding portion of the pressing rod.
Element number description: the measuring tube 1, the liquid outlet tube 2, the straight-through piston 3, the piston sleeve 4, the pressure rod 5, the threaded cover 6, the sealing ring 7, the threaded connector 8, the felt ring 9, the cut-off end 10, the flow channel hole 11, the first scale mark 12, the bulge 13 and the second scale mark 14.
Detailed Description
The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.
The invention will be further explained with reference to the following figures and examples:
as shown in fig. 1 to 5, an elliptical flow plunger burette with an emergency flow stopping device comprises a regulating valve for controlling the opening and closing of the burette, wherein the regulating valve comprises a cylindrical piston sleeve and a rod-shaped through piston, a pair of through holes are arranged on the wall of the piston sleeve in a penetrating manner along the radial direction of the cylinder wall of the piston sleeve, the upper through hole and the lower through hole are respectively butted with the burette and a liquid outlet pipe, one end of the through piston is inserted into the piston sleeve and is rotatably installed in the piston sleeve, a flow passage hole is arranged at the part of the through piston inserted into the piston sleeve, and the upper end port and the lower end port of the flow passage hole are respectively communicated with the two through holes on the wall of the piston sleeve and are finally. The flow passage hole is oval, the length of the long oval axis of the flow passage hole is not larger than the inner diameters of a burette and a liquid outlet pipe of the burette, so that liquid can only flow out through the flow passage hole, a flow stopping rod piece which can move in the through piston and completely blocks the flow passage hole is further arranged in the through piston along the axial direction of the through piston, the flow stopping rod piece comprises a pressing rod, the pressing rod is inserted into the through piston, when the pressing rod is pressed, the flow passage hole is blocked by the cut-off end of the pressing rod, and when the pressing rod moves outwards, the flow passage hole is opened, so that the flow stopping adjusting function of whether the flow passage hole is communicated or not is further realized through the insertion of the pressing rod on the basis that the flow is adjusted through the abutting degree of the oval flow passage hole and two through holes of the piston sleeve.
Further, as shown in fig. 5 to 6, the pressing rod is of a cylindrical rod-shaped structure, the pressing rod is inserted into the through piston from the threaded joint on the outer end surface of the through piston, a sealing ring is arranged on the end surface of the threaded joint, a threaded cap is screwed on the threaded joint end in a bottle cap screwing structure mode and extrudes the sealing ring, and an expanded end convenient for being grasped by a hand is arranged at one end of the pressing rod, which penetrates through the threaded cap and extends out after penetrating through the sealing ring, so that sealing is ensured and liquid seepage is prevented when the pressing rod is pulled out and inserted. During actual manufacturing, the threaded cover cannot be pressed too tightly, so that the deformable rubber leakage-proof gasket (sealing ring) is prevented from being excessively expanded and deformed, and the flow stopping operation of the compression bar is prevented from being influenced.
Further, as shown in fig. 7, vaseline is further coated on the sealing ring to improve sealing performance and lubricity, and a felt ring for wiping off the vaseline on the compression bar is filled in the hole wall of the through hole where the compression bar penetrates through the threaded cap, so that exposure of the vaseline is reduced as much as possible, and a sealing effect is achieved to a certain extent. It should be noted that the pressing rod is strictly prevented from being coated and stained with vaseline close to the runner hole so as to avoid plugging the fluid channel by pushing the vaseline in; the compression bar should reduce the probability of complete extraction, and if the compression bar is completely extracted, the vaseline in the compression bar and the pore canal should be thoroughly cleaned.
Further, as shown in fig. 5-6, the shutoff end of the pressure lever is in an isosceles trapezoid wedge structure, and two waist portions of the pressure lever intersect with the flow passage hole in a penetrating manner to close the flow passage hole, and the small end surface of the shutoff end is arranged towards the bottom of the insertion hole in the straight-through piston, into which the pressure lever is inserted, so as to improve the effect of blocking and shutoff.
Further, the interception end is made of wear-resistant sealing rubber, and as shown in fig. 5-6, two bottom edges of the interception end are respectively and oppositely located in the concave cavity at the bottom of the jack hole and the jack hole, so that the effect of blocking interception is further improved, and the runner hole is completely closed.
Furthermore, as shown in fig. 7, a plurality of scale marks, namely first scale marks, are arranged on one side of the pressure lever near the handheld end of the pressure lever, and the scale marks are arranged along the length direction of the pressure lever, so that whether and to what extent the flow passage hole is blocked can be determined during operation.
Further, as shown in fig. 5 and 6, the through piston is inserted into the piston sleeve and is in threaded connection with the piston sleeve, when the through piston is screwed to the bottom, the flow passage hole is communicated with the two through holes and forms a maximum flow passage, and when the through piston is screwed outwards to a position where a step at the end face of the threaded section of the through piston is in contact with a limit step in the piston sleeve, the flow passage hole is completely closed. The design is also intended to facilitate a clear degree of communication between the through piston and the bore during operation.
Preferably, the through piston rotates in situ in the piston sleeve, that is, there is no axial feed amount like a threaded connection, and this embodiment mode is the fastest embodiment mode when the through piston rotates to close, and the use is most convenient, and only the through piston needs to be directly rotated to its limit position, and the limit position can be implemented by arranging a corresponding limit step on the inner wall of the piston sleeve, and the like, which is not described in detail in this embodiment.
Furthermore, a circle of scale marks, namely a second scale mark, is arranged at the disc-shaped holding part at the free end of the through piston, a protrusion is further arranged on the end surface of the piston sleeve facing the holding part, and the protrusion can be aligned with the scale marks when the through piston rotates.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (9)
1. An elliptic flow prop plug burette with an emergency flow stopping device comprises a regulating valve for controlling the opening and closing of the burette, wherein the regulating valve comprises a cylindrical piston sleeve and a rod-shaped through piston, the cylinder wall of the piston sleeve is provided with a pair of through holes along the radial direction in a penetrating way, one end of the through piston is inserted into the piston sleeve and can be rotatably arranged in the piston sleeve, the part of the through piston inserted into the piston sleeve is provided with a flow passage hole, and the upper and lower ports of the flow passage hole are respectively communicated with the two through holes on the cylinder wall of the piston sleeve and finally completely aligned when the through piston is rotated; the method is characterized in that:
the flow passage hole is oval, the length of the long axis of the oval is not more than the inner diameters of the burette and the liquid outlet pipe of the burette, a flow stopping rod piece which can move in the through piston and completely blocks the flow passage hole is further arranged in the through piston along the axial direction of the through piston, the flow stopping rod piece comprises a pressing rod, the pressing rod is inserted into the through piston, the flow passage hole is blocked by the flow stopping end of the pressing rod when the pressing rod moves inwards, and the flow passage hole is opened when the pressing rod moves outwards.
2. An oval flow path stoppered burette with an emergency flow stop device as claimed in claim 1 wherein: the pressure lever is of a cylindrical rod-shaped structure, a threaded joint is inserted into the through piston from the pressure lever to the outer end face of the through piston, a sealing ring is arranged on the end face of the threaded joint, a threaded cap is screwed on the threaded joint end in a bottle cap screwing structure mode and extrudes the sealing ring, and an expanded end convenient for grabbing and poking is arranged at one end of the pressure lever, which penetrates through the threaded cap and extends out after penetrating through the sealing ring.
3. An oval flow field plug burette with an emergency flow stop device as claimed in claim 2, wherein: vaseline is further coated on the sealing ring, and a felt ring used for wiping off the vaseline on the compression bar is filled in the through hole wall of the compression bar penetrating through the threaded cover.
4. An oval flow path stoppered burette with an emergency flow stop device as claimed in claim 1 wherein: the cut-off end of the pressure rod is of an isosceles trapezoid wedge block structure, two waist parts of the cut-off end are intersected with the flow channel hole in a penetrating mode to seal the flow channel hole, and the small end face of the cut-off end is arranged towards the bottom of the jack hole for the pressure rod to be inserted into the straight-through piston.
5. The elliptical flow field obstructed burette with an emergency flow stopping device of claim 4, wherein: the flow intercepting end is made of wear-resistant sealing rubber, and two bottom edges of the flow intercepting end are respectively and oppositely located in the concave cavity at the bottom of the jack hole and the jack.
6. An oval flow path stoppered burette with an emergency flow stop device as claimed in claim 1 wherein: a plurality of scale marks are arranged on one side of the pressing rod, which is close to the handheld end of the pressing rod, and the scale marks are arranged along the length direction of the pressing rod.
7. An oval flow path stoppered burette with an emergency flow stop device as claimed in claim 1 wherein: the straight-through piston is inserted into the piston sleeve and is in threaded connection with the piston sleeve, the flow passage hole is communicated with the two through holes when the straight-through piston is screwed to the bottom, a maximum flow passage is formed, and when the straight-through piston is screwed out to a position where a step on the end face of the threaded section of the straight-through piston is in contact with a limiting step in the piston sleeve, the flow passage hole is completely closed.
8. An oval flow path stoppered burette with an emergency flow stop device as claimed in claim 1 wherein: the straight-through piston rotates in situ in the piston sleeve.
9. An oval flow field clogging burette with an emergency flow stop device according to claim 7 or 8, wherein: the through piston is provided with a circle of scale marks at a disc-shaped holding part close to the free end of the through piston, and a protrusion is further arranged on the end face, facing the holding part, of the piston sleeve and can be aligned with the scale marks when the through piston rotates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920164241.8U CN213286908U (en) | 2019-01-30 | 2019-01-30 | Elliptical flow prop plug burette with emergency flow stopping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920164241.8U CN213286908U (en) | 2019-01-30 | 2019-01-30 | Elliptical flow prop plug burette with emergency flow stopping device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213286908U true CN213286908U (en) | 2021-05-28 |
Family
ID=75982223
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920164241.8U Expired - Fee Related CN213286908U (en) | 2019-01-30 | 2019-01-30 | Elliptical flow prop plug burette with emergency flow stopping device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213286908U (en) |
-
2019
- 2019-01-30 CN CN201920164241.8U patent/CN213286908U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210528 |
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| CF01 | Termination of patent right due to non-payment of annual fee |