CN219911153U - Internally cooled Roots pump device - Google Patents
Internally cooled Roots pump device Download PDFInfo
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- CN219911153U CN219911153U CN202321556722.6U CN202321556722U CN219911153U CN 219911153 U CN219911153 U CN 219911153U CN 202321556722 U CN202321556722 U CN 202321556722U CN 219911153 U CN219911153 U CN 219911153U
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- roots pump
- pump body
- internal cooling
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- 239000000498 cooling water Substances 0.000 claims abstract description 34
- 238000001816 cooling Methods 0.000 claims abstract description 30
- 230000003584 silencer Effects 0.000 claims abstract description 13
- 239000003921 oil Substances 0.000 claims description 10
- 239000002131 composite material Substances 0.000 claims description 9
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 230000001360 synchronised effect Effects 0.000 claims description 5
- 239000012208 gear oil Substances 0.000 claims description 3
- 239000010687 lubricating oil Substances 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 7
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000010985 leather Substances 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000009987 spinning Methods 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The utility model relates to an internal cooling type Roots pump device, which comprises a Roots pump, an air inlet channel, an air exhaust channel and an internal cooling water channel, wherein the Roots pump comprises a pump body, the top surface of the pump body is provided with an air inlet, the air inlet is connected with the air inlet channel, the bottom surface of the pump body is provided with an air exhaust port, the air exhaust port is connected with the air exhaust channel, the outer end of the air inlet channel is an outer air inlet, the air inlet channel is provided with an air inlet silencer, the pipeline between the air inlet silencer and the outer air inlet of the air inlet channel is connected with the internal cooling water channel, and a negative pressure automatic pressure relief valve is also connected between the air inlet silencer and the outer air inlet of the air inlet channel; the outer end of the exhaust channel is an outer exhaust port, an exhaust port silencer is arranged on the exhaust channel, and a positive pressure automatic pressure release valve is further connected between the exhaust port silencer and the outer exhaust port of the exhaust channel. The double-acting Roots pump capable of being used under positive and negative pressure does not need an additional cooling device and can be used for internal cooling directly by water.
Description
Technical Field
The utility model relates to the technical field of Roots vacuum pumps, in particular to an internal cooling Roots pump device.
Background
The Roots vacuum pump is a rotary positive displacement vacuum pump, and two 8-shaped rotors are utilized to rotate in a shell to generate suction and exhaust effects. When the vacuum pump operates, gas is discharged after being compressed by the rotor, so that a large working pressure difference exists between an inlet and an outlet of the pump body, the linear speed of the rotor surface is close to the thermal movement speed of molecules due to the high rotating speed of the rotor (1000 r/min-3000 r/min), and the temperature rise, the compression ratio and the efficiency of the Roots pump have a direct relation.
The Roots pump is mainly used in industries such as papermaking, packaging, spinning, leather, clothing, printing, waste water treatment, positive and negative pressure pneumatic conveying of particulate matters and the like, a large amount of high-temperature water vapor is arranged in the processes of pumping and exhausting of the Roots pump, and heat generated by compressed gas is usually radiated and cooled through an additional cooling device outside a pump body, namely, an external indirect cooling mode is adopted, and the mode has the advantages of high cost, poor cooling effect, high cooling water consumption and high motor energy consumption; the defects of overload and the like of the Roots pump are easily caused, the reliability of the pump is poor, the normal use of the Roots pump is influenced, and the Roots vacuum pump adopting indirect cooling can also generate overheat overload phenomenon in use due to the influence of the size of the cooling device, the temperature of cooling water and the flow of cooling water.
Disclosure of Invention
The utility model aims to overcome the defects and provide the internal cooling type Roots pump device which directly uses water to carry out internal cooling, thereby improving the reliability of the pump, adapting to any vacuum condition and discharge pressure condition, and having simpler structure and better safety.
The purpose of the utility model is realized in the following way:
the internal cooling type Roots pump device comprises a Roots pump body, an air inlet channel, an air exhaust channel and an internal cooling water channel, wherein the Roots pump body is provided with an air inlet on the top surface, the air inlet is connected with the air inlet channel, an air outlet is arranged on the bottom surface of the pump body, the air outlet is connected with the air exhaust channel, and two air outlets are respectively arranged on two side surfaces of the pump body; the main shaft of the Roots pump is connected with a coupler, and the coupler is connected with a motor;
one end of the air inlet channel is connected with an air inlet of the Roots pump, the other end of the air inlet channel is an external air inlet, an air inlet silencer is arranged on the air inlet channel, an internal cooling water channel is connected on a pipeline between the air inlet silencer and the external air inlet of the air inlet channel, and the external end of the internal cooling water channel is an internal cooling water inlet; a negative pressure automatic pressure release valve is also connected between the air inlet muffler and the outer air inlet of the air inlet channel; one end of the exhaust channel is connected with an exhaust port at the bottom of the Roots pump, the other end of the exhaust channel is an outer exhaust port, an exhaust port silencer is arranged on the exhaust channel, and a positive pressure automatic pressure relief valve is further connected between the exhaust port silencer and the outer exhaust port of the exhaust channel.
Further, the front end of the pump body is provided with a front end cover, the rear end of the pump body is provided with a rear end cover, and a pair of parallel three-vane involute rotors which are horizontally installed and meshed with each other are arranged in the pump body: the driving rotor and the driven rotor are respectively arranged in a front end cover and a rear end cover at two ends of the pump body through bearings; a bearing is arranged between the front end cover and the main shaft, and a bearing is also arranged between the rear end cover and the main shaft.
Further, a front cover is arranged on the front end cover, a rear cover is arranged on the rear end cover, a gear is arranged in the rear cover, and the gear is sleeved at the tail end of the main shaft; the driving rotor and the driven rotor make the rotors synchronously rotate at constant speed in the pump body through a pair of synchronous gears in the oil tank.
Further, a lubricating oil tank is arranged between the front end cover and the front cover, a gear oil tank is arranged between the rear end cover and the rear cover, and an air suction cavity is arranged between the front end cover and the rear end cover in the pump body; the novel air suction pump is characterized in that a composite seal is arranged between the main shaft and the front end cover, a composite seal is arranged between the main shaft and the rear end cover, and the pump body and the oil tanks at two sides effectively separate the oil tanks from an air suction cavity in the pump body through the composite seal in the end covers at two ends of the pump body.
Further, a coupling protective cover is arranged outside the coupling.
Further, the outer air inlet of the air inlet channel is connected with the control system through a first stop valve, and a pressure transmitter is arranged between the first stop valve and the control system.
Further, two branches are arranged on a pipeline between the exhaust port muffler and the outer exhaust port of the exhaust channel, one branch is connected with the control system through a thermometer, and the other branch is connected with the control system through a pressure gauge.
Further, the Roots pump is connected with the cooling water inlet through a second stop valve and a second electromagnetic valve, and the Roots pump is connected with the cooling water outlet.
Further, the internal cooling water channel is provided with a regulating valve, a first electromagnetic valve and a flowmeter.
Compared with the prior art, the utility model has the beneficial effects that:
the utility model provides an internal cooling type Roots pump device, which provides a double-acting Roots pump capable of being used under positive and negative pressure, and can be used for directly carrying out internal cooling by water, the Roots pump does not need an additional cooling device, a certain amount of normal-temperature water is directly supplemented at an air inlet of the Roots pump through a water inlet stop valve and a flow regulating valve to cool heat generated by compressed gas of internal parts of the Roots pump, and in addition, cooling water can also be used for carrying out water seal on internal gaps of the Roots pump, so that the backflow of the compressed gas can be reduced, and the air extraction efficiency of the Roots pump can be improved. Compared with the method for directly spraying cooling water by adopting a cooler, the method has the advantages of better brief heat exchange cooling effect, simpler structure, lower use cost and the like; the Roots pump does not need a forevacuum pump, can be used independently, has wider application range, is not limited by working vacuum, has smaller temperature rise, greatly improves the reliability of the pump and has longer service life.
The positive pressure relief valve and the negative pressure relief valve are respectively arranged at the air inlet and the air outlet of the Roots pump, so that the Roots pump is not limited by using vacuum and exhaust pressure, and the Roots pump is not damaged even if the Roots pump is in misoperation, and the reliability and the safety of products are greatly improved. At present, the Roots pump is mainly used in industries such as papermaking, packaging, spinning, leather, clothing, printing, wastewater treatment, positive and negative pressure pneumatic conveying of particulate matters and the like.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
Fig. 2 is a schematic structural view of the Roots pump of the present utility model.
Fig. 3 is a front view of the Roots pump of the present utility model.
Fig. 4 is a front cross-sectional view of the Roots pump of the present utility model.
Fig. 5 is a side sectional view of the Roots pump of the present utility model.
Wherein:
roots pump 1, pump body 1.1, air inlet 1.2, air outlet 1.3, front end cover 1.4, front cover 1.5, rear end cover 1.6, rear cover 1.7, bearing 1.8, gear 1.9, compound seal 1.10, driving rotor 1.11, driven rotor 1.12, coupling 2, coupling shield 2.1, motor 3, air intake channel 4, first stop valve 5, pressure transmitter 6, negative pressure automatic relief valve 7, internal cooling water inlet 8, regulating valve 9, first solenoid valve 10, flowmeter 11, air inlet muffler 12, cooling water inlet 13, second stop valve 14, second solenoid valve 15, cooling water outlet 16, air exhaust channel 17, thermometer 18, positive pressure automatic relief valve 19, air outlet muffler 20, control system 21, pressure gauge 22.
Description of the embodiments
In order to better understand the technical solution of the present utility model, the following detailed description will be made with reference to the accompanying drawings. It should be understood that the following embodiments are not intended to limit the embodiments of the present utility model, but are merely examples of embodiments that may be employed by the present utility model. It should be noted that, the description herein of the positional relationship of the components, such as the component a being located above the component B, is based on the description of the relative positions of the components in the drawings, and is not intended to limit the actual positional relationship of the components.
Example 1
Referring to fig. 1-5, fig. 1 depicts a schematic structural view of the present utility model. As shown in the figure, the internal cooling type Roots pump device comprises a Roots pump 1, an air inlet channel 4, an air exhaust channel 17 and an internal cooling water channel, wherein the Roots pump 1 comprises a pump body 1.1, the top surface of the pump body 1.1 is provided with an air inlet 1.2, the air inlet 1.2 is connected with the air inlet channel 4, the bottom surface of the pump body 1.1 is provided with an air exhaust port 1.3, the air exhaust port 1.3 is connected with the air exhaust channel 17, and two side surfaces of the pump body 1.1 are respectively provided with an air exhaust port 1.3.
The front end of the pump body 1.1 is provided with a front end cover 1.4, the rear end is provided with a rear end cover 1.6, and a pair of parallel three-vane involute rotors which are horizontally arranged and meshed with each other are arranged in the pump body 1.1: the driving rotor 1.11 and the driven rotor 1.12 are arranged on a main shaft, the driven rotor 1.12 is arranged on a rotor shaft, the main shaft and the rotor shaft are arranged in the pump body, and the driving rotor 1.11 and the driven rotor 1.12 are respectively arranged in a front end cover 1.4 and a rear end cover 1.6 at two ends of the pump body through bearings 1.8; a bearing 1.8 is arranged between the front end cover 1.4 and the main shaft, and a bearing 1.8 is also arranged between the rear end cover 1.6 and the main shaft;
the front end cover 1.4 is provided with a front cover 1.5, the front cover 1.5 is fixedly connected to the front side of the front end cover 1.4 by using an inner hexagon screw, the rear end cover 1.6 is provided with a rear cover 1.7, and the rear cover 1.7 is fixedly connected to the rear side of the rear end cover 1.6 by using an inner hexagon screw; a gear 1.9 is arranged in the rear cover 1.7, and the gear 1.9 is sleeved at the tail end of the main shaft; the driving rotor 1.11 and the driven rotor 1.12 make the rotors synchronously rotate at constant speed in the pump body through a pair of synchronous gears 1.9 in the oil tank.
A lubricating oil tank is arranged between the front end cover 1.4 and the front cover 1.5, a gear oil tank is arranged between the rear end cover 1.6 and the rear cover 1.7, and an air suction cavity is arranged between the front end cover 1.4 and the rear end cover 1.6 in the pump body 1.1; the novel air suction pump is characterized in that a composite seal 1.10 is arranged between the main shaft and the front end cover 1.4, a composite seal 1.10 is arranged between the main shaft and the rear end cover 1.6, and the pump body 1.1 and the oil tanks at two sides effectively separate the oil tanks from the air suction cavity in the pump body 1.1 through the composite seal 1.10 in the end covers at two ends of the pump body.
The output shaft end of the main shaft of the Roots pump 1 extends out of the front cover 1.5 and is connected with the coupler 2, and the coupler 2 is connected with the motor 3; the outside of the coupler 2 is provided with a coupler protective cover 2.1.
One end of the air inlet channel 4 is connected with an air inlet 1.2 of the Roots pump 1, the other end of the air inlet channel is an external air inlet, an air inlet silencer 12 is arranged on the air inlet channel 4, an internal cooling water channel is connected to a pipeline between the air inlet silencer 12 and the external air inlet of the air inlet channel 4, a regulating valve 9, a first electromagnetic valve 10 and a flowmeter 11 are arranged on the internal cooling water channel, the external end of the internal cooling water channel is an internal cooling water inlet 8, the internal cooling water inlet 8 is connected with the regulating valve 9, the regulating valve 9 is connected with the first electromagnetic valve 10, and the first electromagnetic valve 10 is connected with the flowmeter 11; a negative pressure automatic pressure release valve 7 is also connected between the air inlet muffler 12 and the outer air inlet of the air inlet channel 4; the outer air inlet of the air inlet channel 4 is also connected with a control system 21 through a first stop valve 5, and a pressure transmitter 6 is arranged between the first stop valve 5 and the control system 21.
One end of the exhaust channel 17 is connected with an exhaust port 1.3 at the bottom of the Roots pump 1, the other end of the exhaust channel is an external exhaust port, a machine seat is arranged below the pump body 1.1, the exhaust channel 17 is arranged in the machine seat, an exhaust port muffler 20 is arranged on the exhaust channel 17, and gas exhausted by the Roots vacuum pump is discharged into the atmosphere through the exhaust port of the muffler after being subjected to circulating noise reduction treatment of the muffler; two branches are arranged on a pipeline between the exhaust port muffler 20 and the outer exhaust port of the exhaust channel 17, one branch is connected with the control system 21 through the thermometer 18, and the other branch is connected with the control system 21 through the pressure gauge 22; and a positive pressure automatic pressure release valve 19 is also connected between the exhaust port muffler 20 and the outer exhaust port of the exhaust channel 17.
The Roots pump 1 is connected with the cooling water inlet 13 through the second stop valve 14 and the second electromagnetic valve 15, and the Roots pump 1 is connected with the cooling water outlet 16.
Working principle:
the utility model relates to an internal cooling type Roots pump device, which comprises a Roots pump, wherein the Roots pump comprises a pump body, and a pair of three-vane involute rotors which are horizontally arranged in parallel and meshed with each other are arranged in the pump body; each rotor is respectively supported in end covers at two ends of the pump body by two bearings. The motor provides rotary torque for the driving rotor through the coupler, and the driving rotor drives the driven rotor and the driving rotor to rotate at the same speed in the opposite direction in the pump body together through a pair of synchronous gears in the gear box so as to realize air suction and air exhaust. The upper part of the pump body is provided with an air suction port, the lower part of the pump body and the left and right sides of the pump body are provided with three air exhaust ports in total, and the purpose of arranging the three air exhaust ports on the pump body is to facilitate the on-site arrangement and the pipeline connection of customers, and the air exhaust ports are one of optional use.
When the Roots pump is used as a vacuum pump, the air inlet of the Roots pump is well connected with the vacuumized system through a pipeline, and the air outlet is in an open atmosphere state. When the Roots pump runs, the motor transmits power to the driving rotor through the elastic coupling, the driving rotor drives the driven rotor through a pair of synchronous gears in the oil tank, and the two rotors rotate in the pump body at constant speed and in opposite directions, so that the Roots pump vacuumizes the system. Because the rotor adopts a three-blade structure, three air suction and exhaust functions can be realized by each rotor rotating for one circle. The cooling water inlet valve of the air inlet of the Roots pump is used for supplementing a certain amount of cooling water to the Roots pump in the running process of the Roots pump, and besides the cooling water plays a role in cooling the heating component of the Roots pump, the cooling water can also fill the gap between the rotor and the inner cavity of the pump body, so that the back flow of gas can be reduced, the pumping efficiency of the pump is improved, and compared with the indirect cooling pump, the temperature of the direct cooling mode is reduced by more than 20 ℃, so that the energy consumption can be saved, and the pumping efficiency and the running reliability can be improved. And if the system vacuum reaches the maximum allowable value of the Roots pump, the negative pressure automatic relief valve of the air inlet of the Roots pump can be opened and automatically control the Roots pump to normally operate in the specified vacuum.
When the Roots pump is used as a compressor or a fan, the air inlet of the Roots pump needs to be in an open atmosphere state, the air outlet of the Roots pump is connected to a closed system or a pipeline, and when the Roots pump works, after the pressure of the air outlet reaches the maximum allowable pressure of the Roots pump, the positive pressure automatic relief valve of the air outlet of the Roots pump can be automatically opened and automatically controls the Roots pump to normally run for a long time under the specified pressure.
The foregoing is merely a specific application example of the present utility model, and the protection scope of the present utility model is not limited in any way. All technical schemes formed by equivalent transformation or equivalent substitution fall within the protection scope of the utility model.
Claims (9)
1. An internal cooling type roots pump device, which is characterized in that: the novel air conditioner comprises a Roots pump (1), an air inlet channel (4), an air outlet channel (17) and an internal cooling water channel, wherein the Roots pump (1) comprises a pump body (1.1), an air inlet (1.2) is formed in the top surface of the pump body (1.1), the air inlet (1.2) is connected with the air inlet channel (4), an air outlet (1.3) is formed in the bottom surface of the pump body (1.1), the air outlet (1.3) is connected with the air outlet channel (17), and an air outlet (1.3) is formed in two side surfaces of the pump body (1.1) respectively; the main shaft of the Roots pump (1) is connected with a coupler (2), and the coupler (2) is connected with a motor (3);
one end of the air inlet channel (4) is connected with an air inlet (1.2) of the Roots pump (1), the other end of the air inlet channel is an external air inlet, an air inlet silencer (12) is arranged on the air inlet channel (4), and an internal cooling water channel is connected on a pipeline between the air inlet silencer (12) and the external air inlet of the air inlet channel (4); a negative pressure automatic pressure release valve (7) is also connected between the air inlet muffler (12) and the outer air inlet of the air inlet channel (4); one end of the exhaust channel (17) is connected with an exhaust port (1.3) at the bottom of the Roots pump (1), the other end of the exhaust channel is an external exhaust port, and an exhaust port muffler (20) is arranged on the exhaust channel (17); and a positive pressure automatic pressure release valve (19) is further connected between the exhaust port muffler (20) and the outer exhaust port of the exhaust channel (17).
2. An internal cooling Roots pump device according to claim 1, wherein: the front end of the pump body (1.1) is provided with a front end cover (1.4), the rear end of the pump body is provided with a rear end cover (1.6), and a pair of parallel three-vane involute rotors which are horizontally installed and meshed with each other are arranged in the pump body (1.1): the driving rotor (1.11) and the driven rotor (1.12), the driving rotor (1.11) is arranged on a main shaft, the driven rotor (1.12) is arranged on a rotor shaft, the main shaft and the rotor shaft are arranged in a pump body, and the driving rotor (1.11) and the driven rotor (1.12) are respectively arranged in a front end cover (1.4) and a rear end cover (1.6) at two ends of the pump body through bearings (1.8); a bearing (1.8) is arranged between the front end cover (1.4) and the main shaft, and a bearing (1.8) is also arranged between the rear end cover (1.6) and the main shaft.
3. An internal cooling Roots pump device according to claim 2, wherein: a front cover (1.5) is arranged on the front end cover (1.4), and a rear cover (1.7) is arranged on the rear end cover (1.6); a gear (1.9) is arranged in the rear cover (1.7), and the gear (1.9) is sleeved at the tail end of the main shaft; the driving rotor (1.11) and the driven rotor (1.12) synchronously rotate at a constant speed in the pump body through a pair of synchronous gears (1.9) in the oil tank.
4. An internal cooling Roots pump device according to claim 2, wherein: a lubricating oil tank is arranged between the front end cover (1.4) and the front cover (1.5), a gear oil tank is arranged between the rear end cover (1.6) and the rear cover (1.7), and an air suction cavity is arranged between the front end cover (1.4) and the rear end cover (1.6) in the pump body (1.1); the novel oil tank is characterized in that a composite seal (1.10) is arranged between the main shaft and the front end cover (1.4), a composite seal (1.10) is arranged between the main shaft and the rear end cover (1.6), and the oil tank on the two sides of the pump body (1.1) is effectively separated from the air suction cavity in the pump body (1.1) through the composite seal (1.10) in the end covers on the two ends of the pump body.
5. An internal cooling Roots pump device according to claim 1, wherein: the outside of the coupler (2) is provided with a coupler protective cover (2.1).
6. An internal cooling Roots pump device according to claim 1, wherein: the outer air inlet of the air inlet channel (4) is also connected with a control system (21) through a first stop valve (5), and a pressure transmitter (6) is arranged between the first stop valve (5) and the control system (21).
7. An internal cooling Roots pump device according to claim 1, wherein: two branches are arranged on a pipeline between the exhaust port muffler (20) and an external exhaust port of the exhaust channel (17), one branch is connected with the control system (21) through a thermometer (18), and the other branch is connected with the control system (21) through a pressure gauge (22).
8. An internal cooling Roots pump device according to claim 1, wherein: the Roots pump (1) is connected with the cooling water inlet (13) through the second stop valve (14) and the second electromagnetic valve (15), and the Roots pump (1) is connected with the cooling water outlet (16).
9. An internal cooling Roots pump device according to claim 1, wherein: the internal cooling water channel is provided with a regulating valve (9), a first electromagnetic valve (10) and a flowmeter (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321556722.6U CN219911153U (en) | 2023-06-19 | 2023-06-19 | Internally cooled Roots pump device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321556722.6U CN219911153U (en) | 2023-06-19 | 2023-06-19 | Internally cooled Roots pump device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219911153U true CN219911153U (en) | 2023-10-27 |
Family
ID=88434038
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321556722.6U Active CN219911153U (en) | 2023-06-19 | 2023-06-19 | Internally cooled Roots pump device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219911153U (en) |
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2023
- 2023-06-19 CN CN202321556722.6U patent/CN219911153U/en active Active
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