CN202645998U - Low pressure balanced compact three screw pump with built-in safety valve - Google Patents
Low pressure balanced compact three screw pump with built-in safety valve Download PDFInfo
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- CN202645998U CN202645998U CN 201120475675 CN201120475675U CN202645998U CN 202645998 U CN202645998 U CN 202645998U CN 201120475675 CN201120475675 CN 201120475675 CN 201120475675 U CN201120475675 U CN 201120475675U CN 202645998 U CN202645998 U CN 202645998U
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Abstract
The utility model provides a low pressure balanced compact three screw pump with a built-in safety valve, which comprises a pump body, a front and a rear covers, driving and driven screws, and the safety valve. The three screw pump is characterized in that the driving and driven screws are directly arranged into the pump body without a bush; an installing hole for the safety valve is arranged in the rear cover and the safety valve is installed in the installing hole; and the axial force of the driving and driven screws adopts a low pressure balance design. The pump body of the three screw pump is integrated with the bush as one, and the safety valve is built-in, so the three screw pump is simple in structure and small in size, especially suitable for places with limited installation space. The axial force of the driving and driven screws adopts a low pressure balance design, so the pressure-bearing capability is good. The inlet of the pump is located on the rear cover, so different relative positions of the inlet and the outlet can be realized as long as the installation position of the rear cover is changed, therefore easily satisfying the requirements of directions of different pipelines on spot. The flange of the inlet of the pump body is sealed by an O-shaped ring, improving the sealing reliability and reducing the number of flange connection bolts, and greatly decreased the labor intensity for pipeline connection.
Description
[technical field]
The utility model relate to fluid carry use that three screw pump, particularly a kind of pump housing and lining one, safety valve are built-in, the low-pressure balance built-in relief valve compact type three screw pump of principal and subordinate's screw rod low-pressure balance, compact structure.
[background technique]
The structure that traditional three screw pump generally adopts the pump housing to separate with lining.Wherein having a kind of is that safety valve is external, and master and slave screw axial power adopts the three screw pump of low-pressure balance design.The three screw pump of this structure has the strong characteristics of master and slave bar voltage endurance capability, but owing to adopting the structure that the pump housing separates with lining and safety valve is external, the machine shape size is larger, is subject to great restriction in its use of the limited occasion of some installing spaces (such as hydraulic oil unit, boats and ships etc.).Also having a kind of is that safety valve is built-in, the three screw pump of the non-hydro-cushion design of driven screw axial power.The three screw pump of this structure is because of with the built-in design of safety valve, therefore its profile is compared aforementioned pump structure and is seemed compact, but owing to adopting non-hydro-cushion design from the bar axial force, its voltage endurance capability is lower, and owing to directly acting on the bonnet of the pump housing from the axial force of bar, exist pump housing bonnet by from the worn out intrinsic hidden danger of bar.In addition, this structure is when setting safety valve pressure, thereby ambient air can enter the accuracy that pump chamber affects the pressure setting of safety valve.Have, this structure still follows the design concept that traditional pump housing separates with lining again, and machine shape is still compact not, does not still satisfy the demand of the narrow and small occasion of installing space.
[model utility content]
The purpose of this utility model is in order to overcome the deficiencies in the prior art, and a kind of compact structure, bearing capacity is strong, installation and maintenance are easy low-pressure balance built-in relief valve compact type three screw pump product are provided.
The utility model be address the above problem the scheme that adopts be the design a kind of low-pressure balance built-in relief valve compact type three screw pump.It comprises the pump housing, front/rear cover, and master and slave screw rod and safety valve is characterized in that the described pump housing not by the lining master and slave screw rod of directly packing into, is provided with outlet(discharge) flange on the pump housing; Be provided with the mounting hole of safety valve in the described bonnet, described safety valve is packed into wherein, radially also be provided with inlet flange on the bonnet, and safety valve is communicated with pump housing hyperbaric chamber; The axial force of described master and slave screw rod adopts low-pressure balance, and described low-pressure balance from screw axial power is will realize with being communicated with from screw front end from the spiro rod rear end low-pressure cavity by balance tube.
The beneficial effects of the utility model are:
1. the pump housing and lining unite two into one, safety valve is built-in, simple for structure, volume is little, are specially adapted to the narrow and small place of installing space.
2. principal and subordinate's bar axial force adopts the low-pressure balance design, and bearing capacity is strong.
3. special pressure regulating mechanism design makes the setting of safety valve pressure more convenient, more accurate.
4. the entrance of pump is located on the bonnet, only needs to change the installation position of bonnet, just can realize the relativeness of pump inlet/outlet, easily satisfies the needs of on-the-spot different pipeline trends.
5. the pump housing is imported and exported flange and is adopted seal with O ring, has both improved the reliability of sealing, the quantity of minimizing flange bolt, greatly reduces again the labor intensity that pipeline connects.
[description of drawings]
Fig. 1 is low-pressure balance built-in relief valve compact type three screw pump plan view;
Fig. 2 is low-pressure balance built-in relief valve compact type three screw pump plan view;
The safety valve structure figure of Fig. 3 low-pressure balance built-in relief valve compact type three screw pump;
Fig. 4 rear cover structure plan view;
Fig. 5 rear cover structure left view.
Among the figure: the 1-pump housing; The 3-bonnet; The 4-mobile jib; 5-is from bar; The 6-balance set; The 7-safety valve; The 8-balance tube; The 9-Stuffing box; The 10-sealing gland; The 11-back-up ring; The 12-protecgulum; The 13-adjustable lever; 14-O shape circle; The 15-spring; The 16-spool; The 17-spring seat; The 18-valve gap.
Be described in detail with reference to accompanying drawing below in conjunction with embodiment of the present utility model.
[embodiment]
The utility model has designed a kind of pump housing and lining integral type, principal and subordinate's bar axial force low-pressure balance, the built-in compact type three screw pump of safety valve for achieving the above object.It comprises the pump housing, bonnet, mobile jib, from bar, balance set, safety valve, balance tube, Stuffing box, sealing gland, back-up ring and protecgulum etc.The said pump housing is pressure part of the present utility model, is the installation cavity of principal and subordinate's bar, and the pump housing is the unification of body cover, and external form is cylindrical.Pump housing employing section bar forms by machining, is provided with outlet(discharge) flange on the pump housing.Said bonnet is entrance chamber of the present utility model (low-pressure cavity), is again the fitting seat of safety valve, and inlet flange is positioned at radially.Bonnet is casting, and the relative entrance axis of bonnet is preset 90 °, 180 ° and 270 ° of three safety valve mounting holes, realizes the different inlet/outlet relative position of pump by changing its installation position.What setting angle no matter, safety valve all can be communicated with pump housing hyperbaric chamber.Safety valve of the present utility model is spring pressure unloading valve.The axial force of the master and slave screw rod of the present invention adopts low-pressure balance.Described low-pressure balance from screw axial power is will realize with being communicated with from screw front end from the spiro rod rear end low-pressure cavity by balance tube.
The entering of the described pump housing and bonnet, its structural formula of outlet(discharge) flange are by SAE J518 standard design.
Seal with O ring is adopted in the adjustable lever of described safety valve and the sealing between the bonnet.
As depicted in figs. 1 and 2, the utility model low-pressure balance built-in relief valve compact type three screw pump is by the pump housing 1, bonnet 3, mobile jib 4, form from bar 5, balance set 6, safety valve 7, balance tube 8, Stuffing box 9, sealing gland 10, back-up ring 11, protecgulum 12 etc.
When pump work, power is by mobile jib 4 inputs, and mobile jib 4 drives does the synchromesh campaign from bar 5.At this moment, medium enters pump housing low-pressure cavity from the entrance of bonnet 3, and along with mobile jib 4, from the hyperbaric chamber that is transported to vertically the pump housing 1 that relatively rotates of bar 5, then the outlet through the pump housing 1 is pumped out.
The pump housing 1 low-pressure cavity is communicated with the inner chamber of balance set 6 by balance tube 8, and low piezodielectric is incorporated into high voltage terminal axle head from bar 5, realizes the low-pressure balance from bar 5, and assurance is in tension state at work all the time from bar 5, thereby raising is from the bearing capacity of bar.
Claims (5)
1. a low-pressure balance built-in relief valve compact type three screw pump comprises the pump housing, front/rear cover, and master and slave screw rod and safety valve is characterized in that the described pump housing not by the lining master and slave screw rod of directly packing into, is provided with outlet(discharge) flange on the pump housing; Be provided with the mounting hole of safety valve in the described bonnet, described safety valve is packed into wherein, radially also be provided with inlet flange on the bonnet, and safety valve is communicated with pump housing hyperbaric chamber; The axial force of described master and slave screw rod adopts low-pressure balance, and described low-pressure balance from screw axial power is will realize with being communicated with from screw front end from the spiro rod rear end low-pressure cavity by balance tube.
2. low-pressure balance built-in relief valve compact type three screw pump according to claim 1 is characterized in that the described pump housing is the unification of body cover, and external form is cylindrical.
3. low-pressure balance built-in relief valve compact type three screw pump according to claim 1 and 2 is characterized in that described bonnet is casting, and the relative entrance axis of described bonnet is preset 90 °, 180 ° and 270 ° of three safety valve mounting holes.
4. low-pressure balance built-in relief valve compact type three screw pump according to claim 3 is characterized in that describedly entering, its structural formula of outlet(discharge) flange is by SAE J 518 standard design.
5. low-pressure balance built-in relief valve compact type three screw pump according to claim 1 is characterized in that the adjustable lever of described safety valve and the sealing between the bonnet adopt seal with O ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120475675 CN202645998U (en) | 2011-11-25 | 2011-11-25 | Low pressure balanced compact three screw pump with built-in safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120475675 CN202645998U (en) | 2011-11-25 | 2011-11-25 | Low pressure balanced compact three screw pump with built-in safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202645998U true CN202645998U (en) | 2013-01-02 |
Family
ID=47415115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120475675 Expired - Fee Related CN202645998U (en) | 2011-11-25 | 2011-11-25 | Low pressure balanced compact three screw pump with built-in safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202645998U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105143675A (en) * | 2013-03-01 | 2015-12-09 | 耐驰泵及系统有限公司 | Screw pump with at least two parts |
| CN106122006A (en) * | 2016-08-30 | 2016-11-16 | 葫芦岛龙源采油配套设备有限公司 | A kind of screw pump potentiation numerical control anti-reverse mechanism |
| CN108286516A (en) * | 2018-01-15 | 2018-07-17 | 陕西科技大学 | The carbon dioxide gas compressor screw oil pump of excess air can be excluded automatically |
| CN108343604A (en) * | 2018-01-15 | 2018-07-31 | 陕西科技大学 | Carbon dioxide gas compressor screw oil pump |
| CN109915214A (en) * | 2019-03-31 | 2019-06-21 | 丹东隆强科技有限责任公司 | Steam-water helical screw power machine with axial thrust balancing devices |
-
2011
- 2011-11-25 CN CN 201120475675 patent/CN202645998U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105143675A (en) * | 2013-03-01 | 2015-12-09 | 耐驰泵及系统有限公司 | Screw pump with at least two parts |
| CN106122006A (en) * | 2016-08-30 | 2016-11-16 | 葫芦岛龙源采油配套设备有限公司 | A kind of screw pump potentiation numerical control anti-reverse mechanism |
| CN108286516A (en) * | 2018-01-15 | 2018-07-17 | 陕西科技大学 | The carbon dioxide gas compressor screw oil pump of excess air can be excluded automatically |
| CN108343604A (en) * | 2018-01-15 | 2018-07-31 | 陕西科技大学 | Carbon dioxide gas compressor screw oil pump |
| CN109915214A (en) * | 2019-03-31 | 2019-06-21 | 丹东隆强科技有限责任公司 | Steam-water helical screw power machine with axial thrust balancing devices |
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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: 20130102 Termination date: 20161125 |