CN210423052U - Water diversion tank capable of automatically supplementing water - Google Patents
Water diversion tank capable of automatically supplementing water Download PDFInfo
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- CN210423052U CN210423052U CN201921337959.9U CN201921337959U CN210423052U CN 210423052 U CN210423052 U CN 210423052U CN 201921337959 U CN201921337959 U CN 201921337959U CN 210423052 U CN210423052 U CN 210423052U
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Abstract
The utility model relates to a but diversion jar of automatic water supply, relate to the technical field of industrial equipment, which comprises a tank body, the interval is provided with inlet tube and the outlet pipe with jar body intercommunication on the jar body lateral wall, the inlet tube is located the top of outlet pipe, be provided with the moisturizing pipe with jar body intercommunication on the inlet tube top and the jar body lateral wall of one side relative with the outlet pipe, be provided with the suction pump of water source intercommunication on the moisturizing pipe, be provided with on the jar body lateral wall between moisturizing pipe and the outlet pipe and communicate and be vertical control tube with jar body, one of control tube keeping away from and jar body coupling is served and is provided with the apron, be provided with on the control tube and control the controlling means that the suction pump opened and stop according. The utility model discloses a controlling means detects the internal water level of jar, controls the suction pump according to the water level and opens and stop for the water level of the jar body is maintained at certain within range, has guaranteed when the jar body is opened, can not lead to the water pump damage because the water level crosses lowly, has improved the life of water pump.
Description
Technical Field
The utility model belongs to the technical field of industrial equipment's technique and specifically relates to a but diversion jar of automatic water supply is related to.
Background
The water diversion tank is a water pump water suction device, and is a sealed tank body, the tank body is generally provided with a water inlet pipe and a water outlet pipe, the water outlet pipe is connected in series on the water pump, so that a water suction port of the water pump is changed from negative pressure water suction to positive pressure water suction, the operation reliability of the water pump is much higher, and meanwhile, the water diversion tank is kept vacuum and is replenished through the water inlet pipe.
But the water pump is often opened and stops, causes the decline of water level in the diversion jar, leads to the diversion jar probably can't produce sufficient negative high pressure at the during operation to lead to the inlet tube can't absorb the water in the cistern, cause the water level in the diversion jar too low, thereby the water pump idle running, the damage to the water pump is very big, consequently need when the water pump stop operation, adds water to the diversion jar automatically, reduces the damage to the water pump.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a but automatic water supply's diversion jar has guaranteed when jar body is opened, can not lead to the water pump damage because the water level is low excessively, has improved the life of water pump.
The above object of the present invention is achieved by the following technical solutions:
the utility model provides a but diversion tank of automatic water supply, includes a jar body, the interval is provided with inlet tube and the outlet pipe with jar body intercommunication on the lateral wall of the jar body, the inlet tube is located the top of outlet pipe, the inlet tube top just with be provided with the moisturizing pipe with jar body intercommunication on the lateral wall of the jar body of the relative one side of outlet pipe, be provided with the suction pump of water source intercommunication on the moisturizing pipe, be provided with on the lateral wall of the jar body between moisturizing pipe and the outlet pipe and communicate with jar body and be vertical control tube, control tube keeps away from and serves and is provided with the apron with jar body coupling, be provided with on the control tube and control the controlling means that the suction pump opened and stop according to the.
By adopting the technical scheme, the control device detects the water level in the tank body, when the water level in the tank body is close to the water outlet pipe, the control device controls the water suction pump to start to add water to the tank body, and when the water level in the tank body reaches a position close to the water replenishing pipe, the control device controls the water suction pump to stop; detect the internal water level of jar through controlling means, control the suction pump according to the water level and open and stop for the water level of the jar body maintains in certain within range, has guaranteed when the jar body is started, can not lead to the water pump damage because the water level crosses lowly, has improved the life of water pump.
Preferably, the control device comprises a sliding rod which is slidably arranged on the cover plate in a penetrating manner and is square, a floating block which is arranged at one end of the sliding rod in the control pipe, is smaller than the diameter of the inner pipe of the control pipe and is circular, a mounting plate which is arranged on the cover plate and is vertical, a first travel switch and a second travel switch which are arranged at the upper end and the lower end of the mounting plate at intervals and are electrically connected with the water pump, and an induction block which is arranged on the sliding rod between the first travel switch and the second travel switch, has coincident projection in the vertical direction with projection of the first travel switch in the vertical direction; when the upper top surface of the induction block is abutted to the first travel switch, the upper top surface of the floating block is not contacted with the cover plate, and when the lower bottom surface of the induction block is abutted to the second travel switch, the floating block is positioned above the water outlet pipe.
By adopting the technical scheme, the control pipe is communicated with the tank body, and water in the tank body enters the control pipe, so that when the water level in the tank body is reduced to drive the floating block to move downwards, the floating block moves to drive the sliding rod to move, the sliding rod moves to drive the induction block to move downwards, the induction block moves downwards to touch the second travel switch, the second travel switch triggers a signal to control the starting of the water pump, and the water pump is started to add water into the tank body through the water replenishing pipe; the jar body water level rises, and the water level in the control tube also rises simultaneously and drives the kicking block and rise, and the kicking block rises and drives the response piece and rise, touches first travel switch when the response piece, and first travel switch trigger signal control suction pump stop-start to come the internal water level of control jar to maintain at certain within range.
Preferably, the lateral wall of the water outlet pipe corresponding to the tank body is provided with a water outlet hole, and a filter screen is embedded in the water outlet hole.
Through adopting above-mentioned technical scheme, through the setting of filter screen, reduced the water pump and because impurity blocks up and make the probability that the water pump damaged when drawing water from the jar internal.
Preferably, be provided with spaced apart on first travel switch's the mounting panel lateral wall be equipped with two and be vertical waist shape holes, first travel switch and second travel switch are close to the one end of mounting panel and all are provided with the fixed plate, be provided with on the fixed plate pass waist shape hole and with fixed plate threaded connection's screw rod, the one end that the fixed plate was kept away from to the screw rod is provided with the star type handle of contradicting on the lateral wall of mounting panel and fixed plate one side of the back of the body mutually.
Through adopting above-mentioned technical scheme, twist and move star type handle and make star type handle keep away from the mounting panel, can remove star type handle, star type handle removes and drives the fixed plate and remove, and the fixed plate removes and drives first travel switch and second travel switch and remove to this mesh of the scope of adjusting the internal water level of jar.
Preferably, a circular bearing sheet is arranged at one end, close to the fixing plate, of the star-shaped handle, and the end face of the bearing sheet is larger than that of one end, close to the bearing sheet, of the star-shaped handle.
Through adopting above-mentioned technical scheme, through the setting of carrier plate, increased the contact range of star type handle and mounting panel lateral wall to when the star type handle compresses tightly on the mounting panel, reduced the pressure of mounting panel lateral wall to star type handle terminal surface, reduced the probability of star type handle damage.
Preferably, the bottom of the tank body is provided with a cleaning device for cleaning the bottom of the tank body.
Through adopting above-mentioned technical scheme, jar body bottom is because can store water for a long time, and impurity can be piled up to jar body bottom, and these impurity can influence jar internal quality of water, washs jar internal through belt cleaning device, has reduced the influence of impurity to jar internal quality of water.
Preferably, the cleaning device comprises a support arranged on the inner side wall of the tank body below the water outlet pipe, a rotating rod which is rotatably arranged at the center of the support and penetrates through the support and is vertical, a scraping plate which is arranged on one end of the rotating rod below the support in a rotating rod center array mode and is close to one side of the lower bottom wall of the tank body and is attached to the side wall of the inner bottom of the tank body, a drain pipe which is arranged at the bottom of the tank body and is communicated with the tank body, a control valve arranged on the drain pipe, and a driving assembly which is arranged on the side wall of the tank body above the support and is connected with.
Through adopting above-mentioned technical scheme, drive assembly drives the bull stick and rotates, and the bull stick rotates and drives the scraper blade and rotate, and the scraper blade rotates and comes to wash jar body bottom, then opens the control valve for impurity is discharged outside the jar body from the blow off pipe, accomplishes the washing to the jar body with this.
Preferably, the driving assembly comprises a first bevel gear arranged at one end of the rotating rod above the bracket, a motor arranged on the outer side wall of the tank body and an output shaft penetrating through the side wall of the tank body, and a second bevel gear arranged on the output shaft of the motor and meshed with the first bevel gear.
Through adopting above-mentioned technical scheme, the motor starts to drive the rotation of second bevel gear, and second bevel gear rotates and drives first bevel gear and rotate, and first bevel gear rotates and drives the bull stick and rotate to this realizes driving the bull stick pivoted purpose through the motor rotation.
To sum up, the utility model discloses a beneficial technological effect does:
1. the water level in the tank body is detected through the control device, the water suction pump is controlled to be started and stopped according to the water level, so that the water level of the tank body is maintained in a certain range, the water pump is prevented from being damaged due to the fact that the water level is too low when the tank body is started, and the service life of the water pump is prolonged;
2. through the arrangement of the filter screen, the probability that the water pump is damaged due to the blockage of impurities when the water pump pumps water from the tank body is avoided;
3. through the setting of carrier plate, increased the contact range of star type handle and mounting panel lateral wall to when the star type handle compresses tightly on the mounting panel, reduced the pressure of mounting panel lateral wall to star type handle terminal surface, reduced the probability of star type handle damage.
Drawings
FIG. 1 is a schematic structural view of the present invention, in which the control tube is partially cut along the control tube axis;
FIG. 2 is an enlarged schematic view of section A of FIG. 1;
FIG. 3 is a schematic structural view of the present invention, in which the side wall of the tank body is partially cut;
FIG. 4 is an enlarged schematic view of section B of FIG. 3;
fig. 5 is the structural schematic diagram of the utility model, the tank body is provided with a side wall which is partially cut, and the water suction pump is hidden.
Reference numerals: 10. a tank body; 11. a water replenishing pipe; 12. a water outlet pipe; 13. a water pump; 14. a water outlet hole; 15. a filter screen; 16. a water inlet pipe; 20. a control tube; 21. a cover plate; 30. a control device; 31. a slide bar; 32. floating blocks; 33. mounting a plate; 331. a waist-shaped hole; 34. a first travel switch; 35. a second travel switch; 36. an induction block; 40. a fixing plate; 41. a screw; 42. a star-shaped handle; 43. a carrier sheet; 50. a cleaning device; 51. a support; 52. a rotating rod; 521. a connecting rod; 53. a squeegee; 54. a blow-off pipe; 55. a control valve; 56. a drive assembly; 561. a first bevel gear; 562. a motor; 563. a second bevel gear.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The utility model provides a but diversion tank of automatic water supply, refer to fig. 1 and fig. 3, including a jar body 10, interval fixed mounting has inlet tube 16 and outlet pipe 12 with jar body 10 intercommunication on the 10 lateral walls of jar body, inlet tube 16 is located the top of outlet pipe 12, inlet tube 16 top and with outlet pipe 12 relative one side jar body 10 lateral walls on fixed mounting have with jar body 10 intercommunication the moisturizing pipe 11, fixed mounting has the suction pump 13 of water source intercommunication on the moisturizing pipe 11, outlet pipe 12 has seted up apopore 14 with jar body 10 corresponding lateral wall on, 14 embedded filter screens 15 that are equipped with of apopore, filter screens 15 have reduced the probability that the water pump made the water pump damage because impurity blocks up when drawing water from jar body 10.
Referring to fig. 1 and 2, a control pipe 20 which is vertical and communicated with the tank body 10 is fixedly installed on the side wall of the tank body 10 between the water replenishing pipe 11 and the water outlet pipe 12, and a cover plate 21 is fixedly installed on one end, far away from the end connected with the tank body 10, of the control pipe 20. The control pipe 20 is provided with a control device 30 for controlling the starting and stopping of the water pump 13, the control device 30 comprises a sliding rod 31, a floating block 32, a mounting plate 33, a first travel switch 34, a second travel switch 35 and an induction block 36, and the sliding rod 31 is slidably arranged on the cover plate 21 and is square; the floating block 32 is fixedly installed at one end of the sliding rod 31 in the control tube 20, the diameter of the floating block 32 is smaller than that of the inner tube of the control tube 20 and is circular, and the installation plate 33 is fixedly installed on the upper top surface of the cover plate 21 and is in a vertical state.
The first travel switch 34 and the second travel switch 35 are both mounted on the mounting plate 33, the first travel switch 34 and the second travel switch 35 are respectively located on the upper side and the lower side of the mounting plate 33, and the first travel switch 34 and the second travel switch 35 are both travel switches of the model WLCA 2-2; the sensing block 36 is fixedly installed on the sliding rod 31 outside the control tube 20 and located between the first travel switch 34 and the second travel switch 35, and meanwhile, the projection of the sensing block 36 in the vertical direction is overlapped with the projection of the first travel switch 34 in the vertical direction. When the upper top surface of the sensing block 36 abuts against the first travel switch 34, the upper top surface of the floating block 32 does not contact the cover plate 21, and when the lower bottom surface of the sensing block 36 abuts against the second travel switch 35, the floating block 32 is located above the water outlet pipe 12.
The water level in the tank body 10 is reduced to drive the floating block 32 to move downwards, the floating block 32 moves downwards to drive the sliding rod 31 to move downwards, the sliding rod 31 moves downwards to drive the induction block 36 to move downwards, the induction block 36 moves downwards to touch the second travel switch 35, the second travel switch 35 triggers a signal to control the starting of the water pump 13, and the water pump 13 is started to add water into the tank body 10 through the water supplementing pipe 11; the water level of the tank body 10 rises, meanwhile, the water level in the control pipe 20 also rises to drive the floating block 32 to rise, the floating block 32 rises to drive the induction block 36 to rise, when the induction block 36 touches the first travel switch 34, the first travel switch 34 triggers a signal to control the water pump 13 to stop starting, so that the water level in the tank body 10 is controlled to be maintained in a certain range, the water pump cannot be damaged due to too low water level when the tank body 10 is started, and the service life of the water pump is prolonged.
Referring to fig. 3 and 4, two vertical waist-shaped holes 331 are formed in the side wall of the mounting plate 33 on which the first travel switch 34 is mounted at intervals, a fixing plate 40 is fixedly mounted at one end, close to the mounting plate 33, of each of the first travel switch 34 and the second travel switch 35, a screw 41 which penetrates through the waist-shaped holes 331 and is in threaded connection with the fixing plate 40 is arranged on the mounting plate 33, and a star-shaped handle 42 which abuts against the side wall of the mounting plate 33, on the side opposite to the fixing plate 40, is arranged at one end, away from the fixing plate 40. The star-shaped handle 42 is screwed to enable the star-shaped handle 42 to be far away from the mounting plate 33, so that the star-shaped handle 42 can be moved, the star-shaped handle 42 moves to drive the fixing plate 40 to move, and the fixing plate 40 moves to drive the first travel switch 34 and the second travel switch 35 to move, so that the purpose of adjusting the range of the water level in the tank body 10 is achieved.
A circular bearing sheet 43 is fixedly arranged at one end of the star handle 42 close to the fixing plate 40, the area of the end surface of the bearing sheet 43 is larger than that of the end surface of the star handle 42 close to the bearing sheet 43, and the bearing sheet 43 enlarges the contact range of the star handle 42 and the side wall of the mounting plate 33.
Referring to fig. 3 and 5, the bottom of the tank 10 is provided with a cleaning device 50 for cleaning the bottom of the tank 10, a bracket 51 of the cleaning device 50, a rotating rod 52, a scraping plate 53, a sewage discharge pipe 54, a control valve 55 and a driving assembly 56, wherein the bracket 51 is fixedly arranged on the inner side wall of the tank 10 below the water outlet pipe 12; the rotating rod 52 penetrates through the center of the bracket 51, and the rotating rod 52 is rotatably connected with the bracket 51 and is in a vertical state; three connecting rods 521 arranged around the center array of the rotating rod 52 are fixedly arranged at one end of the rotating rod 52 positioned below the bracket 51, the scraper 53 is fixedly arranged on the lower side wall of the connecting rod 521 far away from one side of the rotating rod 52, and the side wall of the scraper 53 close to one side of the lower bottom wall of the tank body 10 is attached to the inner bottom wall of the tank body 10; the sewage discharge pipe 54 is fixedly arranged on the outer bottom wall of the tank body 10 and is communicated with the tank body 10; the control valve 55 is fixedly arranged on the sewage draining pipe 54; the driving assembly 56 is provided on the sidewall of the can body 10 above the bracket 51, and the driving assembly 56 is connected with the rotating rod 52.
The driving assembly 56 comprises a first bevel gear 561, a motor 562 and a second bevel gear 563, wherein the first bevel gear 561 is fixedly installed on one end of the rotating rod 52 above the bracket 51; the motor 562 is fixedly arranged on the outer side wall of the tank body 10 above the bracket 51, and an output shaft of the motor 562 penetrates through the side wall of the tank body 10 and extends into the tank body 10; the second bevel gear 563 is fixedly installed on an output shaft of the motor 562, and the second bevel gear 563 is engaged with the first bevel gear 561. The motor 562 is started to drive the second bevel gear 563 to rotate, the second bevel gear 563 is rotated to drive the first bevel gear 561 to rotate, the first bevel gear 561 is rotated to drive the rotating rod 52 to rotate, the rotating rod 52 rotates to drive the scraper 53 to rotate, the scraper 53 rotates to clean the bottom of the tank 10, and then the control valve 55 is opened to discharge impurities out of the tank 10 from the sewage discharge pipe 54, so that the tank 10 is cleaned.
The working principle of the embodiment is as follows:
the water level in the tank body 10 is reduced to drive the floating block 32 to move downwards, the floating block 32 moves downwards to drive the induction block 36 to touch the second travel switch 35 to control the starting of the water pump 13, and the water pump 13 is started to add water into the tank body 10; the water level of the tank body 10 rises, the floating block 32 rises to drive the induction block 36 to touch the first travel switch 34, and the first travel switch 34 controls the water pump 13 to stop starting, so that the water level in the tank body 10 is controlled to be maintained in a certain range, the water pump cannot be damaged due to too low water level when the tank body 10 is started, and the service life of the water pump is prolonged.
The motor 562 is started to drive the scraper 53 to rotate, the scraper 53 rotates to clean the bottom of the tank 10, and then the control valve 55 is opened, so that impurities are discharged out of the tank 10 from the sewage pipe 54, and the cleaning of the tank 10 is completed.
It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. The utility model provides a but automatic water supply's diversion jar, includes jar body (10), its characterized in that: a water inlet pipe (16) and a water outlet pipe (12) which are communicated with the tank body (10) are arranged on the side wall of the tank body (10) at intervals, the water inlet pipe (16) is positioned above the water outlet pipe (12), a water replenishing pipe (11) communicated with the tank body (10) is arranged on the side wall of the tank body (10) above the water inlet pipe (16) and opposite to the water outlet pipe (12), a water pump (13) communicated with a water source is arranged on the water supplementing pipe (11), a control pipe (20) which is communicated with the tank body (10) and is vertical is arranged on the side wall of the tank body (10) between the water supplementing pipe (11) and the water outlet pipe (12), a cover plate (21) is arranged at one end of the control tube (20) far away from the end connected with the tank body (10), the control pipe (20) is provided with a control device (30) for controlling the starting and stopping of the water pump (13) according to the water quantity of the water in the tank body (10).
2. The automatic water replenishing priming tank of claim 1, wherein: the control device (30) comprises a sliding rod (31) which is slidably arranged on the cover plate (21) in a penetrating mode and is square, a floating block (32) which is arranged at one end of the sliding rod (31) positioned in the control tube (20), is smaller than the diameter of an inner tube of the control tube (20) in diameter and is circular, a mounting plate (33) which is arranged on the cover plate (21) and is vertical, a first travel switch (34) and a second travel switch (35) which are arranged at the upper end and the lower end of the mounting plate (33) at intervals and are electrically connected with the water suction pump (13), and an induction block (36) which is arranged on the sliding rod (31) positioned between the first travel switch (34) and the second travel switch (35) and is overlapped with the projection of the first travel switch (34) in the vertical direction; when the upper top surface of the induction block (36) is abutted to the first travel switch (34), the upper top surface of the floating block (32) is not contacted with the cover plate (21), and when the lower bottom surface of the induction block (36) is abutted to the second travel switch (35), the floating block (32) is positioned above the water outlet pipe (12).
3. The automatic water replenishing priming tank of claim 1, wherein: the water outlet pipe (12) and the side wall corresponding to the tank body (10) are provided with a water outlet hole (14), and a filter screen (15) is embedded in the water outlet hole (14).
4. The automatic water replenishing priming tank of claim 2, wherein: be provided with two vertical waist shape holes (331) have been seted up at the interval on mounting panel (33) lateral wall of first travel switch (34), the one end that first travel switch (34) and second travel switch (35) are close to mounting panel (33) all is provided with fixed plate (40), be provided with on fixed plate (40) and pass waist shape hole (331) and with fixed plate (40) threaded connection's screw rod (41), the one end that fixed plate (40) were kept away from in screw rod (41) is provided with star type handle (42) of contradicting on mounting panel (33) and fixed plate (40) lateral wall of one side of carrying on the back mutually.
5. The automatic water replenishing priming tank of claim 4, wherein: one end of the star-shaped handle (42) close to the fixing plate (40) is provided with a circular bearing sheet (43), and the area of the end face of the bearing sheet (43) is larger than that of the end face of the star-shaped handle (42) close to the bearing sheet (43).
6. The automatic water replenishing priming tank of claim 1, wherein: the bottom of the tank body (10) is provided with a cleaning device (50) for cleaning the bottom of the tank body (10).
7. The automatic water replenishing priming tank of claim 6, wherein: the cleaning device (50) comprises a support (51) arranged on the inner side wall of the tank body (10) below the water outlet pipe (12), a rotating rod (52) which is rotatably arranged at the center of the support (51) and penetrates through the support (51) and is vertical, a scraping plate (53) which is arranged on one end of the rotating rod (52) below the support (51) in a rotating mode and is close to the side wall of the lower bottom wall of the tank body (10) and is attached to the inner bottom side wall of the tank body (10) in a surrounding mode, a drain pipe (54) which is arranged at the bottom of the tank body (10) and is communicated with the tank body (10), a control valve (55) arranged on the drain pipe (54), and a driving assembly (56) which is arranged on the side wall of the tank body (10) above the support (51) and is connected with the rotating.
8. The automatic water replenishing priming tank of claim 7, wherein: the driving assembly (56) comprises a first bevel gear (561) arranged at one end of a rotating rod (52) positioned above the support (51), a motor (562) arranged on the outer side wall of the tank body (10) and an output shaft penetrating through the side wall of the tank body (10) and extending into the tank body (10), and a second bevel gear (563) arranged on the output shaft of the motor (562) and meshed with the first bevel gear (561).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921337959.9U CN210423052U (en) | 2019-08-15 | 2019-08-15 | Water diversion tank capable of automatically supplementing water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921337959.9U CN210423052U (en) | 2019-08-15 | 2019-08-15 | Water diversion tank capable of automatically supplementing water |
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| Publication Number | Publication Date |
|---|---|
| CN210423052U true CN210423052U (en) | 2020-04-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921337959.9U Active CN210423052U (en) | 2019-08-15 | 2019-08-15 | Water diversion tank capable of automatically supplementing water |
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| Country | Link |
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| CN (1) | CN210423052U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112523157A (en) * | 2020-12-09 | 2021-03-19 | 山东省水利科学研究院 | Hydraulic engineering construction waterproof drainage device with adjustable |
| CN115199560A (en) * | 2022-09-19 | 2022-10-18 | 河北双达石油设备制造有限公司 | Drainage device for pump that can be strong from inhaling |
-
2019
- 2019-08-15 CN CN201921337959.9U patent/CN210423052U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112523157A (en) * | 2020-12-09 | 2021-03-19 | 山东省水利科学研究院 | Hydraulic engineering construction waterproof drainage device with adjustable |
| CN115199560A (en) * | 2022-09-19 | 2022-10-18 | 河北双达石油设备制造有限公司 | Drainage device for pump that can be strong from inhaling |
| CN115199560B (en) * | 2022-09-19 | 2022-12-06 | 河北双达石油设备制造有限公司 | Drainage device for pump that can be strong from inhaling |
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