CN204372081U - Multi stage screw - Google Patents
Multi stage screw Download PDFInfo
- Publication number
- CN204372081U CN204372081U CN201520018433.XU CN201520018433U CN204372081U CN 204372081 U CN204372081 U CN 204372081U CN 201520018433 U CN201520018433 U CN 201520018433U CN 204372081 U CN204372081 U CN 204372081U
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- thread section
- screw
- screw rod
- multi stage
- thread
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Abstract
The utility model relates to a kind of multi stage screw, described multi stage screw body is hollow design, comprise the first thread section, second thread section and the 3rd thread section, one end of described second thread section connects the first thread section, the other end connects the 3rd thread section, described first thread section, second thread section has the different screw thread of pitch separately with the 3rd thread section, when rotating speed is constant, can by controlling to use the thread section of different pitch to carry out the straight-line feed speed of adjusting screw rod, neither need to change rotating speed, do not need to change different screw rods yet, structure is simple, easy to operate.The hollow design of screw body, can pass into cooling liquid and take away the heat that screw rod rotates generation, prevent screw rod thermal distortion in the endoporus of screw rod.
Description
Technical field
The utility model relates to driving mechanism technical field, especially relates to a kind of multi stage screw.
Background technique
The oil transport pipeline of long distance is made up of oil transportation station and pipeline two major parts.The starting point of pipeline is an oil transportation station, is commonly referred to as " at first stop ", oil product or crude oil after initial station is collected, after metering, then by providing power to carry to downstream line at first stop.Initial station is generally laid with oil storage tank, oil transfer pump and oil metering device, if institute's oil transportation product need heating because viscosity is high, is then also provided with heating system.Oil transfer pump provides power that oil product can be moved along pipeline to terminal or next stage oil transportation station, and generally, due to distance, the energy loss of oil product in transportation process is obvious, needs multistage oil transportation station to provide power, until oil product is delivered to terminal.Oil transportation station common name " terminal " of terminal, be mainly responsible for collecting upstream line and carry and next material, therefore also more be furnished with storage tank and metering system.Screw pump is that the spatial volume that engages relying on the pump housing and screw rod to be formed changes and the mobile rotary pump carried liquid or make it supercharging, and the feature of screw pump is flow trim, pressure pulsation is little, have suction capacity, noise is low, efficiency is high, the life-span is long, reliable operation; And its outstanding advantage does not form eddy current, insensitive to the viscosity of medium when being fed sheet of a media, can transfer of highly viscous medium.The screw rod of usual screw drive mechanism has the screw thread of single specification, when rotating speed is certain, the speed of screw rod straight line motion is also certain, for the mechanism needing speed change, needing adjusting rotary speed or change screw rod to reach the object of speed change, is that adjusting rotary speed or replacing screw rod are all cumbersome.And a large amount of heats can be produced in screw rod rotary course, cause the thermal distortion of screw rod, cause the decline of screw rod feed accuracy, have a strong impact on the working life of screw rod.
Model utility content
The technical problems to be solved in the utility model is: the speed of adjusting screw rod transmission, the heat produced in cooling screw transmission process.In order to solve the problem, provide the multi stage screw of a kind of variable-speed, cooling in time.
The utility model solves the technological scheme that its technical problem adopts: a kind of multi stage screw, described multi stage screw body is hollow design, comprise the first thread section, the second thread section and the 3rd thread section, one end of described second thread section connects the first thread section, the other end connects the 3rd thread section, and described first thread section, the second thread section have the different screw thread of pitch separately with the 3rd thread section.When rotating speed is constant, because the pitch of the first thread section, the second thread section and the 3rd thread section is different, can by controlling to use the thread section of different pitch to carry out the straight-line feed speed of adjusting screw rod, first thread section, the second thread section and the 3rd thread section are respectively high, medium and low speed third gear, neither need to change rotating speed, also do not need to change different screw rods, structure is simple, easy to operate.The hollow design of screw body, can pass into cooling liquid and take away the heat that screw rod rotates generation, prevent screw rod thermal distortion in the endoporus of screw rod.
Further, the first thread section and the second thread section joint, the second thread section and the 3rd thread section joint are equipped with annular groove, and the chip that screw rod produces in rotary course is discharged by annular groove.
The material of described multi stage screw is stainless steel.
The beneficial effects of the utility model are: because the pitch of the first thread section, the second thread section and the 3rd thread section is different, when rotating speed is constant, can by controlling to use the thread section of different pitch to carry out the straight-line feed speed of adjusting screw rod, neither need to change rotating speed, do not need to change different screw rods yet, structure is simple, easy to operate.The hollow design of screw body, can pass into cooling liquid and take away the heat that screw rod rotates generation, prevent screw rod thermal distortion in the endoporus of screw rod.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Fig. 1 is structural representation of the present utility model.
In figure: 1. the first thread section, 2. the second thread section, 3. the 3rd thread section, 4. annular groove.
Embodiment
The utility model is described in more detail by reference to the accompanying drawings now.These accompanying drawings are the schematic diagram of simplification, only basic structure of the present utility model are described in a schematic way, and therefore it only shows the formation relevant with the utility model.
A kind of multi stage screw as shown in Figure 1, multi stage screw body is hollow design, comprise the first thread section 1, second thread section 2 and the 3rd thread section 3, one end of second thread section 2 connects the first thread section 1, the other end connects the 3rd thread section 3, first thread section 1, second thread section 2 and has the different screw thread of pitch separately with the 3rd thread section 3.When rotating speed is constant, because the pitch of the first thread section 1, second thread section 2 and the 3rd thread section 3 is different, can by controlling to use the thread section of different pitch to carry out the straight-line feed speed of adjusting screw rod, first thread section 1, second thread section 2 and the 3rd thread section 3 are respectively high, medium and low speed third gear, neither need to change rotating speed, also do not need to change different screw rods, structure is simple, easy to operate.The hollow design of screw body, can pass into cooling liquid and take away the heat that screw rod rotates generation, prevent screw rod thermal distortion in the endoporus of screw rod.First thread section 1 and the second thread section 2 joint, the second thread section 2 and the 3rd thread section 3 joint are equipped with annular groove 4, and the chip that screw rod produces in rotary course is discharged by annular groove 4.The material of multi stage screw is stainless steel.
With above-mentioned according to desirable embodiment of the present utility model for enlightenment, by above-mentioned description, relevant staff in the scope not departing from this model utility technological thought, can carry out various change and amendment completely.The technical scope of this model utility is not limited to the content on specification, must determine its technical scope according to right.
Claims (3)
1. a multi stage screw, it is characterized in that: described multi stage screw body is hollow design, comprise the first thread section (1), the second thread section (2) and the 3rd thread section (3), one end of described second thread section (2) connects the first thread section (1), the other end connects the 3rd thread section (3), and described first thread section (1), the second thread section (2) have the different screw thread of pitch separately with the 3rd thread section (3).
2. multi stage screw as claimed in claim 1, is characterized in that: described first thread section (1) is equipped with annular groove (4) with the second thread section (2) joint, the second thread section (2) with the 3rd thread section (3) joint.
3. multi stage screw as claimed in claim 1, is characterized in that: the material of described multi stage screw is stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520018433.XU CN204372081U (en) | 2015-01-12 | 2015-01-12 | Multi stage screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520018433.XU CN204372081U (en) | 2015-01-12 | 2015-01-12 | Multi stage screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204372081U true CN204372081U (en) | 2015-06-03 |
Family
ID=53328303
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520018433.XU Expired - Fee Related CN204372081U (en) | 2015-01-12 | 2015-01-12 | Multi stage screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204372081U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108904127A (en) * | 2018-04-11 | 2018-11-30 | 丁金 | A kind of application method of the ophthalmic crystalline lens clamping device of double working modes |
| CN109296720A (en) * | 2018-12-03 | 2019-02-01 | 舟山市金久机械制造有限公司 | New Nickel-Based Alloy segmented screw |
| CN113417923A (en) * | 2021-07-15 | 2021-09-21 | 四川大学 | Combined screw structure and assembling and disassembling method |
-
2015
- 2015-01-12 CN CN201520018433.XU patent/CN204372081U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108904127A (en) * | 2018-04-11 | 2018-11-30 | 丁金 | A kind of application method of the ophthalmic crystalline lens clamping device of double working modes |
| CN109296720A (en) * | 2018-12-03 | 2019-02-01 | 舟山市金久机械制造有限公司 | New Nickel-Based Alloy segmented screw |
| CN109296720B (en) * | 2018-12-03 | 2024-03-15 | 舟山市金久机械制造有限公司 | Nickel base alloy segmented screw |
| CN113417923A (en) * | 2021-07-15 | 2021-09-21 | 四川大学 | Combined screw structure and assembling and disassembling method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| 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: 20150603 Termination date: 20190112 |