CN211819901U - Roots pump bypass device convenient to dismouting - Google Patents
Roots pump bypass device convenient to dismouting Download PDFInfo
- Publication number
- CN211819901U CN211819901U CN202020346908.9U CN202020346908U CN211819901U CN 211819901 U CN211819901 U CN 211819901U CN 202020346908 U CN202020346908 U CN 202020346908U CN 211819901 U CN211819901 U CN 211819901U
- Authority
- CN
- China
- Prior art keywords
- bypass
- valve
- roots
- pump
- vacuum pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model discloses a lobe pump bypass device convenient to dismouting, including air inlet pipe way, roots vacuum pump and exhaust pipe, the air inlet pipe way is connected in roots vacuum pump's inlet end, exhaust pipe connects in roots vacuum pump's exhaust end, still be connected with the bypass pipe way between air inlet pipe way and the exhaust pipe, be provided with the bypass valve between the bypass pipe way, the bypass valve includes valve body, valve barrel and case, the upper end at the valve body is connected to the valve barrel, the case can be gliding locates in the valve barrel from top to bottom, the valve body is inside to form the cushion chamber with the valve barrel, be provided with the spring in the cushion chamber, valve barrel and case outside are located to the spring housing, valve barrel and case are connected respectively at the spring both ends. The utility model provides a pair of lobe pump bypass device convenient to dismouting has reduced the running load of lobe vacuum pump, improves vacuum pump job stabilization nature and efficiency.
Description
Technical Field
The utility model relates to a lobe pump field, concretely relates to lobe pump bypass device convenient to dismouting.
Background
The roots vacuum pump, abbreviated as roots pump, is usually used for pressurization to reduce power consumption and increase pumping speed, thereby achieving the effect of energy saving. The Roots vacuum pump features quick start, low power consumption, low maintenance cost, high pumping speed, high efficiency, insensitivity to small amount of water vapor and dust contained in the pumped gas, high pumping speed in a certain pressure range and quick discharge of suddenly released gas. Based on the characteristics, the method is widely applied to smelting, degassing and rolling in vacuum metallurgy, and vacuum distillation, vacuum concentration, vacuum drying and other aspects in chemical industry, food industry and medical industry at present. However, since the roots vacuum pump is not allowed to operate under high differential pressure, the motor is overloaded and even burned out when the roots vacuum pump is started, especially when the pre-vacuum value is not reached. In addition, in the prior art, in the low vacuum and medium vacuum application scenes, a roots vacuum pump integrated with an overload protection bypass valve is used; in a high-vacuum application scene, a Roots vacuum pump without a bypass valve is used, the ultimate vacuum of the Roots vacuum pump is related to the ultimate vacuum of a backing pump, and different ultimate vacuums can be obtained by selecting different backing pumps. Above two kinds of application scenes need purchase the roots vacuum pump of two kinds of not isostructures, firstly with high costs, secondly roots vacuum pump uses and is idle easily.
How to design a bypass device convenient to dismouting, reduction roots vacuum pump running load is the utility model discloses the technical problem that will solve.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problem in the background art, provide a lobe pump bypass device convenient to dismouting. The utility model provides a pair of lobe pump bypass device convenient to dismouting through bypass valve and bypass pipeline's cooperation, has improved vacuum pump job stabilization nature and efficiency, also can install and dismantle simple structure, convenient operation according to lobe vacuum pump actual work demand.
The above technical purpose of the present invention is achieved by the following technical solutions:
the Roots pump bypass device convenient to disassemble and assemble comprises an air inlet pipeline, a Roots vacuum pump and an exhaust pipeline, wherein the air inlet pipeline is connected to the air inlet end of the Roots vacuum pump, the exhaust pipeline is connected to the exhaust end of the Roots vacuum pump, the bypass pipeline is further connected between the air inlet pipeline and the exhaust pipeline, a bypass valve is arranged between the bypass pipelines and comprises a valve body, a valve sleeve and a valve core, the valve sleeve is connected to the upper end of the valve body, the valve core can be arranged in the valve sleeve in a vertical sliding mode, a buffer cavity is formed inside the valve body, with the valve sleeve and the valve core, a spring is arranged in the buffer cavity and is arranged outside the valve sleeve and the valve core, and the.
The Roots pump bypass device convenient to disassemble and assemble comprises a first bypass pipeline and a second bypass pipeline, wherein the first bypass pipeline is connected with an air inlet pipeline through a first flange, the second bypass pipeline is connected with an air outlet pipeline through a second flange, and the first bypass pipeline and the second bypass pipeline are connected through a bypass valve.
The Roots pump bypass device convenient to disassemble and assemble is characterized in that the upper part of the valve sleeve is provided with the elastic retainer ring.
The roots pump bypass device convenient to disassemble and assemble is characterized in that the valve core is provided with the sealing ring.
According to the Roots pump bypass device convenient to disassemble and assemble, the sealing ring is made of rubber.
The Roots pump bypass device convenient to disassemble and assemble is characterized in that the valve sleeve and the valve core are made of metal materials.
Compared with the prior art, the utility model has the advantages of it is following and beneficial effect:
1. the utility model provides a pair of lobe pump bypass device convenient to dismouting is provided with the bypass valve between the bypass pipeline, and when exhaust pipe and air inlet pipeline's pressure differential was too big, the too high gas pressure of roots vacuum pump exhaust pipeline overcome spring force, and the bypass valve is opened for gas returns to air inlet pipeline, has reduced roots vacuum pump's operating load, thereby has played the purpose of protection motor, and has improved vacuum pump job stabilization nature and efficiency.
2. The utility model provides a pair of lobe pump bypass device convenient to dismouting sets up first bypass pipeline, second bypass pipeline, first flange and second flange, can install and dismantle according to roots vacuum pump actual work demand, bypass device simple structure, convenient operation.
3. The free conversion of the functions of the Roots vacuum pump under the high vacuum condition and different use scenes under the medium and low vacuum conditions can be realized.
4. In addition, reduce the input of roots vacuum pump model kind, reduce the stock of roots vacuum pump kind, the management of being convenient for reduces the cost.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art, and it is obvious that the following description is only one embodiment of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic view of the overall structure of a roots pump bypass device convenient to disassemble and assemble according to the present invention;
FIG. 2 is a schematic cross-sectional view of the bypass valve of the present invention in a closed state;
fig. 3 is a schematic sectional view of the bypass valve according to the present invention in an open state.
1-air inlet pipeline, 2-roots vacuum pump, 3-exhaust pipeline, 4-first flange, 5-first bypass pipeline, 6-bypass valve, 601-valve sleeve, 602-valve core, 603-valve body, 604-spring, 605-elastic retainer ring, 606-sealing ring, 7-second bypass pipeline and 8-second flange.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiment of the present invention, all other embodiments obtained without creative work by the ordinary skilled person in the art all belong to the protection scope of the present invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.
Referring to fig. 1 and 2, a roots pump bypass device convenient for disassembly and assembly comprises an air inlet pipeline 1, a roots vacuum pump 2 and an exhaust pipeline 3, the air inlet pipeline 1 is connected with the air inlet end of the Roots vacuum pump 2, the exhaust pipeline 3 is connected with the exhaust end of the Roots vacuum pump 2, a bypass pipeline is also connected between the air inlet pipeline 1 and the exhaust pipeline 3, a bypass valve 6 is arranged between the bypass pipelines, the bypass valve 6 includes a valve body 603, a valve sleeve 601 and a valve core 602, the valve sleeve 601 is connected to the upper end of the valve body 603, the valve core 602 is disposed in the valve sleeve 601 in a vertically sliding manner, a buffer chamber is formed in the valve body 603 with the valve sleeve 601 and the valve core 602, the buffer cavity is an annular space, a spring 604 is arranged in the buffer cavity, the spring 604 is sleeved outside the valve sleeve 601 and the valve core 602, and two ends of the spring 604 are respectively connected with the valve sleeve 601 and the valve core 602.
In the embodiment, the bypass valve 6 is arranged between the bypass pipelines, when the pressure difference between the exhaust pipeline 3 and the air inlet pipeline 1 is too large, the elasticity of the spring 604 is overcome by the overhigh gas pressure of the exhaust pipeline 3 in the Roots vacuum pump 2, the bypass valve 6 is opened, so that gas returns to the air inlet pipeline 1, the pressure difference between the exhaust pipeline 3 and the air inlet pipeline 1 is reduced, the running load of the Roots vacuum pump 2 is reduced, the motor is protected, and the working stability and the efficiency of the Roots vacuum pump 2 are further improved.
Preferably, the bypass pipeline comprises a first bypass pipeline 5 and a second bypass pipeline 7, the first bypass pipeline 5 is connected with the air inlet pipeline 1 through a first flange 4, the second bypass pipeline 7 is connected with the air outlet pipeline 3 through a second flange 8, and the first bypass pipeline 5 is connected with the second bypass pipeline 7 through a bypass valve 6. In this embodiment, the low vacuum is 101325 to 1333Pa, and the medium vacuum is 1333 to 1.33 × 10-1Pa, high vacuum means pressure value of 1.33X 10-1Pa～10-6Pa. In the low vacuum and medium vacuum application scene, a first bypass pipeline 5, a second bypass pipeline 7 and a bypass valve 6 are reserved; in a high vacuum application scene, the first bypass pipeline 5, the second bypass pipeline 7 and the bypass valve 6 can be disassembled, and the first flange 4 and the second flange 8 are blindly injected by blind plates. Can install and dismantle according to 2 actual work demands of roots vacuum pump, need not purchase roots vacuum pump 2 in addition, simple structure, convenient operation.
Preferably, the upper part of the valve sleeve 601 is provided with a circlip 605.
Preferably, a sealing ring 606 is disposed on the valve core 602. Preferably, the sealing ring 606 is made of a rubber material. The sealing ring 606 serves as a seal.
Preferably, the valve sleeve 601 and the valve core 602 are made of metal. The valve sleeve 601 plays a role in protection, and the valve core 602 is made of alloy steel, so that the flow of air flow can be conveniently controlled.
The working principle of the present invention is as follows, please refer to fig. 2, the arrow indicates the direction of gas flow, when the flow rate of the gas flow in the exhaust pipe 3 is too small, the pressure difference between the two ends of the valve core 602 is not enough to overcome the elasticity of the spring 604, the valve core 602 is jacked up under the action of the elasticity of the spring 604, the valve core 602 is separated from the valve sleeve 601, the bypass valve 6 is in the closed state, and the gas cannot enter the intake pipe 1 from the exhaust pipe 3; referring to fig. 3, an arrow indicates a gas flow direction, when a gas flow in the exhaust pipe 3 reaches a minimum opening flow of the bypass valve 6, a pressure at a lower end of the valve core 602 is greater than a pressure at an upper end, the valve core 602 is gradually pressed toward the valve sleeve 601 against an elastic force of the spring 604 under a pressure difference between the exhaust pipe 3 and the intake pipe 1, the valve core 602 is communicated with the valve sleeve 601, the bypass valve 6 is in an open state, and gas enters the intake pipe 1 from the exhaust pipe 3. In a normal situation, the opening or closing action of the bypass valve 6 is determined by the gas pressure difference between the exhaust line 3 and the intake line 1. In this embodiment, the gas pressure difference for opening the bypass valve 6 is 0.08 Mpa.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of 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 (6)
1. A Roots pump bypass device convenient to disassemble and assemble comprises an air inlet pipeline (1), a Roots vacuum pump (2) and an exhaust pipeline (3), wherein the air inlet pipeline (1) is connected with an air inlet end of the Roots vacuum pump (2), the exhaust pipeline (3) is connected with an exhaust end of the Roots vacuum pump (2), the Roots pump bypass device is characterized in that the bypass pipeline is further connected between the air inlet pipeline (1) and the exhaust pipeline (3), a bypass valve (6) is arranged between the bypass pipelines, the bypass valve (6) comprises a valve body (603), a valve sleeve (601) and a valve core (602), the valve sleeve (601) is connected to the upper end of the valve body (603), the valve core (602) is arranged in the valve sleeve (601) in a vertically sliding manner, a buffer cavity is formed by the interior of the valve body (603) and the valve sleeve (601) and the valve core (, the spring (604) is sleeved outside the valve sleeve (601) and the valve core (602), and two ends of the spring (604) are respectively connected with the valve sleeve (601) and the valve core (602).
2. A roots-pump bypass device convenient to disassemble and assemble according to claim 1, characterized in that the bypass line comprises a first bypass line (5) and a second bypass line (7), the first bypass line (5) is connected with the air inlet line (1) through a first flange (4), the second bypass line (7) is connected with the exhaust line (3) through a second flange (8), and the first bypass line (5) and the second bypass line (7) are connected through a bypass valve (6).
3. A roots-pump bypass device for easy assembly and disassembly according to claim 1, wherein the valve housing (601) is provided with a circlip (605) at the upper part.
4. A roots-pump bypass device for easy assembly and disassembly according to claim 1, wherein the valve core (602) is provided with a sealing ring (606).
5. A Roots pump bypass device for easy disassembly and assembly as claimed in claim 4, wherein the sealing ring (606) is made of rubber.
6. A roots-pump bypass device convenient to disassemble and assemble according to claim 1, characterized in that the valve sleeve (601) and the valve core (602) are made of metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020346908.9U CN211819901U (en) | 2020-03-18 | 2020-03-18 | Roots pump bypass device convenient to dismouting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020346908.9U CN211819901U (en) | 2020-03-18 | 2020-03-18 | Roots pump bypass device convenient to dismouting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211819901U true CN211819901U (en) | 2020-10-30 |
Family
ID=73012468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020346908.9U Active CN211819901U (en) | 2020-03-18 | 2020-03-18 | Roots pump bypass device convenient to dismouting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211819901U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114593063A (en) * | 2020-12-04 | 2022-06-07 | 中国科学院沈阳科学仪器股份有限公司 | Vacuum pump with bypass structure |
-
2020
- 2020-03-18 CN CN202020346908.9U patent/CN211819901U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114593063A (en) * | 2020-12-04 | 2022-06-07 | 中国科学院沈阳科学仪器股份有限公司 | Vacuum pump with bypass structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6796215B1 (en) | Membrane pump | |
| CN204984884U (en) | Variable -pitch dry screw vacuum pump | |
| CN211819901U (en) | Roots pump bypass device convenient to dismouting | |
| CN201661465U (en) | Novel direct connection vacuum pump | |
| CN203394792U (en) | Energy-saving multistage deep well submersible and centrifugal pump | |
| CN2844531Y (en) | Axial-forced balancing disk unit for balanced sectional multi-stage pump | |
| CN201747618U (en) | Dual-suction multistage centrifugal pump | |
| CN101749251B (en) | Scroll casing type radial split three-grade process pump | |
| CN202811527U (en) | Suction-type centrifugal pump | |
| CN2530072Y (en) | Centrifugal pump | |
| CN215370324U (en) | Pneumatic pressure-discharging and emptying device of magnetic suspension fan | |
| CN2931872Y (en) | Water-ring vacuum pump | |
| CN110778543B (en) | Pneumatic pressurization system for hydraulic oil tank of engineering machinery | |
| CN2937564Y (en) | Water-ring vacuum pump | |
| CN2844530Y (en) | Axial-forced balancer of sectional multi-stage pump | |
| JP3906973B2 (en) | Vacuum exhaust device | |
| CN210371193U (en) | Suction-assisting vacuum pump system for chemical pump | |
| CN209025882U (en) | A kind of electronic water pump for automobile flow blocking mechanism | |
| CN202510410U (en) | Mechanical seal type self-priming pump | |
| CN208330734U (en) | Single cylinder compressor with rolling rotor with second vapor injection | |
| CN215595931U (en) | Two-stage cone type vacuum pump tailored for waste incineration power plant | |
| CN204572472U (en) | A kind of rotational flow self-priming pump | |
| CN205370917U (en) | Compressor unloading valve | |
| CN201593506U (en) | Novel energy saving self-absorbing pump | |
| CN103883766B (en) | Check valve for self-priming system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |