CN209818023U - Natural gas wellhead pipeline throttling device - Google Patents
Natural gas wellhead pipeline throttling device Download PDFInfo
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- CN209818023U CN209818023U CN201920530306.6U CN201920530306U CN209818023U CN 209818023 U CN209818023 U CN 209818023U CN 201920530306 U CN201920530306 U CN 201920530306U CN 209818023 U CN209818023 U CN 209818023U
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Abstract
The utility model discloses a natural gas wellhead pipeline throttling device, wherein the inside of an adjusting cavity is provided with a fixed wheel and a rotating wheel, the centers of the fixed wheel and the rotating wheel are respectively provided with a through hole, and the circumference of the through hole is provided with a plurality of auxiliary through holes; the fixed wheel is fixedly arranged on the air inlet cavity, one end of the rotating wheel is rotatably connected with the fixed wheel, and the other end of the rotating wheel is rotatably connected with the initial end of the air outlet cavity; the adjusting cavity is of a sealing structure and comprises a worm and a rotating handle, the worm is rotatably arranged inside the adjusting cavity, the top end of the worm upwards penetrates through the adjusting cavity and is connected with the rotating handle, and a turbine is correspondingly arranged on the outer wall of the rotating wheel. The utility model discloses a drive arrangement adjusts the swiveling wheel for the through-hole of swiveling wheel changes with the relative position of the through-hole of tight pulley, thereby changes the effect of throttle, the utility model discloses can be used to the throttle of the natural gas of different pressures, has better practicality.
Description
Technical Field
The utility model belongs to the technical field of natural gas exploitation device, concretely relates to natural gas well head pipeline throttling arrangement.
Background
Natural gas is an important clean energy source and is also a life line of national life. The pressure in the gas well is high, and the purpose of stable production can be achieved only by installing a throttling and pressure reducing device at the wellhead to control the gas production rate of the gas well. In the process of throttling and depressurizing, the pressure of the natural gas is rapidly reduced after the natural gas passes through the throttling nozzle, the volume of the natural gas is rapidly increased, the flow of the output natural gas is unstable, and the normal production of the natural gas well is influenced.
Therefore, the throttling device for the natural gas wellhead pipeline is needed to be provided, so that throttling is performed on the ground during natural gas exploitation, the phenomenon that the gas outlet of the gas outlet end is unstable due to the fact that the pressure of the natural gas at the bottom of the ground is too high is avoided, and exploitation of natural gas with different pressures is achieved.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a natural gas well head pipeline throttling arrangement adjusts the swiveling wheel through drive arrangement for the through-hole of swiveling wheel changes with the relative position of the through-hole of fixed pulley, thereby changes the effect of throttle, the utility model discloses can be used to the throttle of the natural gas of different pressures, better practicality has.
The utility model discloses mainly realize through following technical scheme: a natural gas wellhead pipeline throttling device comprises an air inlet cavity, an adjusting cavity and an air outlet cavity which are sequentially communicated, wherein the air inlet cavity is communicated with an air inlet pipe, and the air outlet cavity is communicated with an air outlet pipe; a fixed wheel and a rotating wheel which are coaxially arranged are arranged in the adjusting cavity, through holes are respectively formed in the centers of the fixed wheel and the rotating wheel, and a plurality of auxiliary through holes are formed in the circumferential direction of the through holes; the fixed wheel is fixedly arranged on the air inlet cavity, one end of the rotating wheel is rotatably connected with the fixed wheel, and the other end of the rotating wheel is rotatably connected with the starting end of the air outlet cavity; sealing rubber rings are respectively arranged at the inner connection parts of the rotating wheels; the inside in adjustment chamber still is provided with adjusts drive arrangement, the adjustment chamber is seal structure, it includes worm, twist grip to adjust drive arrangement, the worm rotates the inside that sets up in the adjustment chamber, and the top of worm upwards runs through the adjustment chamber and is connected with twist grip, it is provided with the turbine to correspond on the outer wall of swiveling wheel.
The utility model discloses when using, the worm that the twist grip is connected cooperatees with the turbine that the swiveling wheel outer wall set up, rotates through rotatory twist grip drive swiveling wheel, through rotatory twist grip's angle for through-hole on the swiveling wheel realizes semi-closed, 1/3 seals, link up the isotopose with the through-hole of tight pulley for this throttling arrangement can throttle the natural gas of different pressures. The sealing rubber ring is arranged at the joint of the inner part of the rotating wheel, so that the sealing effect of the left side and the right side of the adjusting cavity is improved, and the safe transportation of natural gas is ensured.
In the use process of the utility model, the fixed wheel is communicated with the through hole of the rotating wheel, and the auxiliary through hole is relatively closed; if the pressure of the natural gas of the air inlet pipe is detected to be larger than a set threshold value, the rotating wheel is driven to rotate so that the fixing wheel is gradually communicated with the auxiliary through holes of the rotating wheel, the pressure at the air outlet pipe is observed, if the pressure at the air outlet pipe reaches a set value, the rotating wheel is stopped to be adjusted, and the throttling effect at the moment accords with a set range. Intake pipe and outlet duct department's pressure measurement can be measured through the sensor, and the technique of sensor measurement is prior art and not the utility model discloses an improvement point, the event is no longer repeated.
The utility model discloses a diameter that changes the supplementary through-hole that the intracavity air current of adjustment passes through realizes the natural gas of the different pressure of throttle, the utility model discloses a diameter that increases supplementary through-hole avoids the natural gas pressure to appear and gathers the emergence of falling the phenomenon, reduces the loss of natural gas to going out the air cavity. The utility model discloses a setting of tight pulley and swiveling wheel has replaced the use of traditional throttle mouth, and rotation through the swiveling wheel is adjustable to the diameter that realizes supplementary through-hole is adjustable, makes the utility model discloses can be applicable to the natural gas throttle of different pressures.
In order to better realize the utility model, a rotary limiting rod is arranged in the rotary handle and is arranged at the top of the adjusting cavity; the rotary handle is provided with a dial gauge, and the rotary limiting rod is provided with an identification icon.
The utility model discloses a twist grip is the cavity ring, and twist grip's inside is through the top of a plurality of connecting rod fixed connection worms, forms fan-shaped space between the adjacent connecting rod, the setting of rotation gag lever post is between adjacent connecting rod, the bottom that rotates the gag lever post sets up the top at the adjustment chamber, the top that rotates the gag lever post is higher than the height of connecting rod, the rotation range of rotation gag lever post restriction twist grip. The last graduation apparatus that is provided with of twist grip, twist grip rotates the gag lever post and instructs the rotatory angle of twist grip when rotating, instructs through the scale, can know rotatory angle, and then confirms the rotatory value of swiveling wheel to the effect of accurate regulation throttle.
In order to better realize the utility model, furthermore, a plurality of channels are arranged on the side wall at the beginning end of the air outlet cavity, sealing blocks are arranged in the channels in a sliding manner, a plurality of auxiliary through pipes are arranged in the channels in sequence from inside to outside, the tail ends of the auxiliary through pipes are respectively communicated with the tail ends of the air outlet cavity, and the tail ends of the air outlet cavity are communicated with an air outlet pipe; the sealing block is mounted in the channel by a spring.
The utility model discloses when using, the natural gas of exploitation gets into the intracavity of giving vent to anger after the chamber of admitting air and the throttle of adjustment chamber, the volume of the natural gas after the throttle increases rapidly, if the natural gas pressure when exploiting is too high, then the sealed piece of natural gas compression, make sealed piece slide in the passageway, make sealed piece promote to the top of supplementary siphunculus in the passageway, make supplementary siphunculus and the chamber intercommunication of giving vent to anger to carry the natural gas with jointly, supplementary siphunculus exports the tail end in the chamber of giving vent to anger with the natural gas, and carry through the. When the sealing block is not stressed or stressed less, the auxiliary through pipe is blocked under the elastic force of the spring.
The utility model discloses a setting of supplementary siphunculus for the flow stability of the natural gas of the intracavity output of giving vent to anger avoids appearing a large amount of accumulations in the intracavity of giving vent to anger after the natural gas throttle, avoids a large amount of natural gases to cause the damage to throttling arrangement, ensures to continuously exploit the natural gas of ground end, increases the efficiency of exploitation.
In order to better realize the utility model discloses, it is further, the tail end that goes out the air cavity is the step structure, and the tail end intercommunication of every step department and supplementary siphunculus. The utility model discloses a tail end at the chamber of giving vent to anger sets up to the step structure for the chamber of giving vent to anger can carry out the energy dissipation to the natural gas after the throttle, makes the air current turbulent motion constantly aggravate, and effective dissipation air current energy forms the low pressure and stabilizes the air current, through the outlet duct output, prevents that the high velocity air current from causing dashing to pipe wall and valve. The tail end of the auxiliary through pipe is connected to the step, so that energy dissipation is performed on the natural gas after the natural gas is shunted through the auxiliary through pipe, the output air flow is stable, and subsequent processing is facilitated.
In order to better realize the utility model discloses, it is further, the internal diameter of the tail end of going out the air cavity increases progressively according to the direction of ventilating in proper order. The utility model discloses an increase at the internal diameter of giving vent to anger chamber tail end, through the diameter of increase circulation pipeline, reduce the velocity of flow after the natural gas throttle, reduce the energy that carries in the natural gas flow for the natural gas flow of output is stable.
In order to better realize the utility model discloses, it is further, the internal diameter in chamber of admitting air is steadilyd decrease in proper order according to the direction of ventilating, the internal diameter at the top in chamber of giving vent to anger scales up in proper order according to the direction of ventilating. The utility model has the advantages that the inner diameter of the air inlet cavity is gradually decreased, so that the speed of the input natural gas is increased, the preliminary throttling depressurization is carried out, and the natural gas can be better throttled and depressurized in the adjusting cavity; the utility model discloses an internal diameter of giving vent to anger the chamber increases progressively in proper order for the speed of the natural gas of output reduces, carries out the energy dissipation to the natural gas of output, makes the velocity of flow of the natural gas of output stable.
The utility model has the advantages that:
(1) the utility model discloses a diameter that changes the supplementary through-hole that the intracavity air current of adjustment passes through realizes the natural gas of the different pressure of throttle, the utility model discloses a diameter that increases supplementary through-hole avoids the natural gas pressure to appear and gathers the emergence of falling the phenomenon, reduces the loss of natural gas to going out the air cavity. The utility model discloses a setting of tight pulley and swiveling wheel has replaced the use of traditional throttle mouth, and rotation through the swiveling wheel is adjustable to the diameter that realizes supplementary through-hole is adjustable, makes the utility model discloses can be applicable to the natural gas throttle of different pressures.
(2) The utility model discloses a setting of supplementary siphunculus for the flow stability of the natural gas of the intracavity output of giving vent to anger avoids appearing a large amount of accumulations in the intracavity of giving vent to anger after the natural gas throttle, avoids a large amount of natural gases to cause the damage to throttling arrangement, ensures to continuously exploit the natural gas of ground end, increases the efficiency of exploitation.
(3) The tail end of the air outlet cavity is of a step structure, and each step is communicated with the tail end of the auxiliary through pipe. The utility model discloses a tail end at the chamber of giving vent to anger sets up to the step structure for the chamber of giving vent to anger can carry out the energy dissipation to the natural gas after the throttle, makes the air current turbulent motion constantly aggravate, and effective dissipation air current energy forms the low pressure and stabilizes the air current, through the outlet duct output, prevents that the high velocity air current from causing dashing to pipe wall and valve. The tail end of the auxiliary through pipe is connected to the step, so that energy dissipation is performed on the natural gas after the natural gas is shunted through the auxiliary through pipe, the energy of the natural gas after throttling and pressure reduction is reduced, the output air flow is stable, and subsequent processing is facilitated.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the rotating wheel and stationary rotation;
fig. 3 is a schematic structural view of the rotating handle and the rotating limiting rod.
Wherein: 1-air inlet cavity, 2-adjusting cavity, 3-air outlet cavity, 4-air inlet pipe, 5-air outlet pipe, 6-fixed wheel, 7-rotating wheel, 8-worm, 9-rotating handle, 10-rotating limiting rod, 11-channel, 12-sealing block and 13-auxiliary through pipe.
Detailed Description
Example 1:
a natural gas wellhead pipeline throttling device is shown in figure 2 and comprises an air inlet cavity 1, an adjusting cavity 2 and an air outlet cavity 3 which are sequentially communicated, wherein the air inlet cavity 1 is communicated with an air inlet pipe 4, and the air outlet cavity 3 is communicated with an air outlet pipe 5; a fixed wheel 6 and a rotating wheel 7 which are coaxially arranged are arranged in the adjusting cavity 2, through holes are respectively formed in the centers of the fixed wheel 6 and the rotating wheel 7, and a plurality of auxiliary through holes are formed in the circumferential direction of the through holes; the fixed wheel 6 is fixedly arranged on the air inlet cavity 1, one end of the rotating wheel 7 is rotatably connected with the fixed wheel 6, and the other end of the rotating wheel is rotatably connected with the initial end of the air outlet cavity 3; sealing rubber rings are respectively arranged at the inner connection parts of the rotating wheel 7; the inside in adjustment chamber 2 still is provided with adjusts drive arrangement, adjustment chamber 2 is seal structure, it includes worm 8, twist grip 9 to adjust drive arrangement, worm 8 rotates the inside that sets up in adjustment chamber 2, and the top of worm 8 upwards runs through adjustment chamber 2 and is connected with twist grip 9, it is provided with the turbine to correspond on the outer wall of swiveling wheel 7.
The utility model discloses when using, the worm 8 that the twist grip 9 is connected cooperatees with the turbine that the swiveling wheel 7 outer wall set up, rotates through rotatory twist grip 9 drive swiveling wheel 7, through the angle of rotatory twist grip 9 for the through-hole on the swiveling wheel 7 and the through-hole of tight pulley 6 realize semi-closed, 1/3 seals, link up the state such as, make this throttling arrangement can throttle the natural gas of different pressure. The sealing rubber ring is arranged at the connecting part of the inner part of the rotating wheel 7, so that the sealing effect of the left side and the right side of the adjusting cavity 2 is improved, and the safe transportation of natural gas is ensured.
In the use process of the utility model, the fixed wheel 6 is communicated with the through hole of the rotating wheel 7, and the auxiliary through hole is relatively closed; if the pressure of the natural gas in the gas inlet pipe 4 is detected to be larger than a set threshold value, the rotating wheel 7 is driven to rotate so that the fixing wheel 6 is gradually communicated with the auxiliary through hole of the rotating wheel 7, meanwhile, the pressure at the gas outlet pipe 5 is observed, if the pressure at the gas outlet pipe 5 reaches a set value, the rotating wheel 7 is stopped to be adjusted, and at the moment, the throttling effect meets the set range.
The utility model discloses a diameter that changes the supplementary through-hole that the air current passes through in the adjustment chamber 2 realizes the natural gas of the different pressure of throttle, the utility model discloses a diameter that increases supplementary through-hole avoids the natural gas pressure to appear and gathers the emergence of falling the phenomenon, reduces the loss of natural gas to going out air cavity 3. The utility model discloses a setting of tight pulley 6 and swiveling wheel 7 has replaced the use of traditional throttle mouth, and rotation through swiveling wheel 7 is adjustable to the diameter that realizes supplementary through-hole is adjustable, makes the utility model discloses can be applicable to the natural gas throttle of different pressures.
Example 2:
the embodiment is further optimized on the basis of embodiment 1, as shown in fig. 3, a rotation limiting rod 10 is arranged in the rotation handle 9, and the rotation limiting rod 10 is installed at the top of the adjustment cavity 2; the rotary handle 9 is provided with a dial gauge, and the rotary limiting rod 10 is provided with an identification icon.
The utility model discloses a turning handle 9 is the cavity ring, and turning handle 9's inside is through the top of a plurality of connecting rod fixed connection worms 8, forms fan-shaped space between the adjacent connecting rod, rotation gag lever post 10 sets up between adjacent connecting rod, the bottom that rotates gag lever post 10 sets up at the top of adjustment chamber 2, the top that rotates gag lever post 10 is higher than the height of connecting rod, rotate the rotation range of gag lever post 10 restriction turning handle 9. Be provided with the graduation apparatus on the twist grip 9, twist grip 9 rotates gag lever post 10 and instructs the rotatory angle of twist grip 9 when rotating, instructs through the scale, can know rotatory angle, and then confirms the rotatory value of swiveling wheel 7 to the effect of accurate regulation throttle.
Other parts of this embodiment are the same as embodiment 1, and thus are not described again.
Example 3:
the embodiment is further optimized on the basis of the embodiment 2, the side wall of the beginning end of the air outlet cavity 3 is provided with a plurality of channels 11, the channels 11 are internally and slidably provided with sealing blocks 12, the channels 11 are internally and sequentially provided with a plurality of auxiliary through pipes 13 from inside to outside, the tail ends of the auxiliary through pipes 13 are respectively communicated with the tail end of the air outlet cavity 3, and the tail end of the air outlet cavity 3 is communicated with an air outlet pipe 5; the sealing block 12 is mounted in the channel 11 by means of a spring.
The utility model discloses when using, the natural gas of exploitation gets into in the air cavity 3 of giving vent to anger through admitting air chamber 1 and adjusting 2 throttles back, the volume of the natural gas after the throttle increases rapidly, natural gas pressure when if the exploitation is too high, then the sealed piece 12 of natural gas compression, make sealed piece 12 slide in passageway 11, make sealed piece 12 promote to the top of supplementary siphunculus 13 in the passageway 11, make supplementary siphunculus 13 and 3 intercommunications in air cavity of giving vent to anger carry the natural gas with jointly, supplementary siphunculus 13 exports the tail end of air cavity 3 with the natural gas, and carry through outlet duct 5. When the sealing block 12 is not stressed or is stressed less, the auxiliary through pipe 13 is blocked under the elastic force of the spring.
The utility model discloses a supplementary siphunculus 13's setting for the flow of the natural gas of output in the air cavity 3 is stable, avoids appearing a large amount of accumulations in air cavity 3 after the natural gas throttle, avoids a large amount of natural gases to cause the damage to throttling arrangement, ensures to continuously exploit the natural gas at the bottom of the earth, increases the efficiency of exploitation.
The other parts of this embodiment are the same as those of embodiment 2, and thus are not described again.
Example 4:
this embodiment is further optimized on the basis of embodiment 3, the tail end of the gas outlet cavity 3 is of a step structure, and each step is communicated with the tail end of the auxiliary through pipe 13. The utility model discloses a tail end at the air outlet cavity 3 sets up to the step structure for air outlet cavity 3 can carry out the energy dissipation to the natural gas after the throttle, makes the air current turbulence constantly aggravate, and effective dissipation air current energy forms the low pressure and stabilizes the air current, through 5 outputs of outlet duct, prevents that high velocity air from leading to the fact towards pipe wall and valve. The tail end of the auxiliary through pipe 13 is connected to the step, so that energy dissipation is performed on the natural gas after the natural gas is shunted through the auxiliary through pipe 13, and the output airflow is stable.
The other parts of this embodiment are the same as those of embodiment 3, and thus are not described again.
Example 5:
the embodiment is further optimized based on the embodiment 4, as shown in fig. 1, the inner diameter of the tail end of the outlet cavity 3 increases in turn in the ventilation direction. The inner diameter of the air inlet cavity 1 is gradually decreased in the ventilation direction, and the inner diameter of the starting end of the air outlet cavity 3 is gradually increased in the ventilation direction.
The utility model discloses an increasing at the internal diameter of 3 tail ends in the air outlet cavity, through the diameter of increase circulation pipeline, reducing the velocity of flow after the natural gas throttle, reducing the energy that carries in the natural gas flow for the natural gas flow of output is stable. The utility model has the advantages that the inner diameter of the air inlet cavity 1 is gradually decreased, so that the speed of the input natural gas is increased, the preliminary throttling depressurization is carried out, and the throttling depressurization of the natural gas in the regulating cavity can be better carried out; the utility model discloses an internal diameter of giving vent to anger chamber 3 increases progressively in proper order for the speed of the natural gas of output reduces, carries out the energy dissipation to the natural gas of output, makes the velocity of flow of the natural gas of output stable.
The other parts of this embodiment are the same as those of embodiment 4, and thus are not described again.
The above is only the preferred embodiment of the present invention, not to the limitation of the present invention in any form, all the technical matters of the present invention all fall into the protection scope of the present invention to any simple modification and equivalent change of the above embodiments.
Claims (6)
1. The throttling device for the natural gas wellhead pipeline is characterized by comprising an air inlet cavity (1), an adjusting cavity (2) and an air outlet cavity (3) which are sequentially communicated, wherein the air inlet cavity (1) is communicated with an air inlet pipe (4), and the air outlet cavity (3) is communicated with an air outlet pipe (5); a fixed wheel (6) and a rotating wheel (7) which are coaxially arranged are arranged in the adjusting cavity (2), through holes are respectively formed in the centers of the fixed wheel (6) and the rotating wheel (7), and a plurality of auxiliary through holes are formed in the circumferential direction of the through holes; the fixed wheel (6) is fixedly arranged in a bearing manner with the air inlet cavity (1), one end of the rotating wheel (7) is rotatably connected with the fixed wheel (6), and the other end of the rotating wheel is rotatably connected with the initial end of the air outlet cavity (3); the inner connecting parts of the rotating wheels (7) are respectively provided with a sealing rubber ring; the inside in adjustment chamber (2) still is provided with adjusts drive arrangement, adjustment chamber (2) are seal structure, it includes worm (8), twist grip (9) to adjust drive arrangement, worm (8) rotate to set up in the inside in adjustment chamber (2), and the top of worm (8) upwards runs through adjustment chamber (2) and is connected with twist grip (9), it is provided with the turbine to correspond on the outer wall of swiveling wheel (7).
2. The natural gas wellhead pipeline throttling device according to claim 1, characterized in that a rotation limiting rod (10) is arranged in the rotation handle (9), and the rotation limiting rod (10) is installed at the top of the adjusting cavity (2); the rotary handle (9) is provided with a dial gauge, and the rotary limiting rod (10) is provided with an identification icon.
3. The throttling device for the natural gas wellhead pipeline according to claim 1, wherein a plurality of channels (11) are formed in the side wall of the beginning end of the gas outlet cavity (3), sealing blocks (12) are arranged in the channels (11) in a sliding manner, a plurality of auxiliary through pipes (13) are sequentially arranged in the channels (11) from inside to outside, the tail ends of the auxiliary through pipes (13) are respectively communicated with the tail end of the gas outlet cavity (3), and the tail end of the gas outlet cavity (3) is communicated with a gas outlet pipe (5); the sealing block (12) is mounted in the channel (11) by means of a spring.
4. A natural gas wellhead pipeline throttling device according to claim 3, wherein the tail end of the gas outlet cavity (3) is of a stepped structure, and each step is communicated with the tail end of the auxiliary through pipe (13).
5. A natural gas wellhead pipeline throttling device according to claim 4, characterized in that the inner diameter of the tail end of the gas outlet cavity (3) increases gradually in the ventilation direction.
6. A natural gas wellhead pipeline throttling device according to any one of claims 1 to 5, characterized in that the inner diameter of the gas inlet cavity (1) is gradually decreased in the ventilation direction, and the inner diameter of the beginning end of the gas outlet cavity (3) is gradually increased in the ventilation direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920530306.6U CN209818023U (en) | 2019-04-18 | 2019-04-18 | Natural gas wellhead pipeline throttling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920530306.6U CN209818023U (en) | 2019-04-18 | 2019-04-18 | Natural gas wellhead pipeline throttling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209818023U true CN209818023U (en) | 2019-12-20 |
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ID=68880573
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920530306.6U Expired - Fee Related CN209818023U (en) | 2019-04-18 | 2019-04-18 | Natural gas wellhead pipeline throttling device |
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| Country | Link |
|---|---|
| CN (1) | CN209818023U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112404077A (en) * | 2020-11-25 | 2021-02-26 | 湖北民族大学 | Glassware cleaning device for experiments |
-
2019
- 2019-04-18 CN CN201920530306.6U patent/CN209818023U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112404077A (en) * | 2020-11-25 | 2021-02-26 | 湖北民族大学 | Glassware cleaning device for experiments |
| CN112404077B (en) * | 2020-11-25 | 2022-01-28 | 湖北民族大学 | Glassware cleaning device for experiments |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191220 Termination date: 20210418 |