CN212656976U - Small-flow screw pump with external pressure regulating type safety valve - Google Patents
Small-flow screw pump with external pressure regulating type safety valve Download PDFInfo
- Publication number
- CN212656976U CN212656976U CN202021305136.0U CN202021305136U CN212656976U CN 212656976 U CN212656976 U CN 212656976U CN 202021305136 U CN202021305136 U CN 202021305136U CN 212656976 U CN212656976 U CN 212656976U
- Authority
- CN
- China
- Prior art keywords
- screw pump
- oil suction
- radial oil
- safety valve
- external pressure
- 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
Landscapes
- Details And Applications Of Rotary Liquid Pumps (AREA)
- Rotary Pumps (AREA)
Abstract
The utility model relates to a low flow screw pump with external pressure regulating type relief valve, including the screw pump casing, end flange and the other end are installed to screw pump casing one end and radial oil absorption lid is installed, be equipped with the oil absorption mouth on a lateral wall of radial oil absorption lid, be equipped with the oil-out on the screw pump casing lateral wall, be equipped with in the screw pump casing with radial oil absorption lid, the transport chamber that the oil-out all communicates, carry the intracavity and install the male rotor, the female rotor, the bottom is equipped with the pressure release passageway in the screw pump casing, be equipped with the intercommunication mouth between pressure release passageway and the transport chamber, pressure release passageway and radial oil absorption lid intercommunication, the disk seat is installed to the outer terminal surface of radial oil absorption lid, threaded mounting has the regulation pole on the disk seat, it has the depression bar to adjust the inside one end of pole stretching into. The utility model discloses the pressure regulating is convenient, can be according to the on-the-spot safety environment, changes the oil-out and radially inhales oily lid in equidirectional, cooperation installation that can be better.
Description
Technical Field
The utility model relates to a technical field of screw pump especially relates to a low discharge screw pump with external pressure regulating type relief valve.
Background
During the operation of the pump, if the discharge pipeline is blocked and the like, the pressure at the discharge end of the pump is increased sharply, and the pump overload damage can be caused in serious conditions and the motor is damaged at the same time. In order to prevent the screw pump from being damaged by overload, a safety valve is usually arranged on the pump. The pump is provided with the safety valve, so that when the discharge pressure exceeds a certain specified value, the safety valve is opened to introduce the high-pressure medium at the discharge end into the inlet end, the pressure at the discharge end is reduced, the further rise of the pressure at the discharge end is avoided, and the overload protection effect is achieved.
However, most safety valves of the existing screw pumps are arranged inside pump bodies, pressure regulation of the safety valves is inconvenient, and the internal safety valves are limited by oil inlet and outlet.
Disclosure of Invention
The utility model aims at solving the defects of the prior art and provides a small-flow screw pump with an external pressure regulating type safety valve.
The utility model discloses a realize above-mentioned purpose, adopt following technical scheme:
a small-flow screw pump with an external pressure-regulating safety valve comprises a screw pump shell, wherein an end cover flange is installed at one end of the screw pump shell, a radial oil suction cover is installed at the other end of the screw pump shell, an oil suction opening is formed in one side wall of the radial oil suction cover, an oil outlet is formed in the side wall of the screw pump shell, which is close to the end cover flange, a conveying cavity communicated with the radial oil suction cover and the oil outlet is formed in the screw pump shell, a male rotor and a female rotor meshed with the male rotor are installed in the conveying cavity, a pressure relief channel is formed in the inner bottom of the screw pump shell, a communication opening is formed between the top of one end of the pressure relief channel and the conveying cavity, the other end of the pressure relief channel is communicated with the radial oil suction cover, a valve seat is installed on the outer end face of the radial, the pressure lever is connected with a spring, the other end of the spring is connected with a valve core, and the valve core extends into the pressure relief channel.
The inside terminal surface of disk seat stretching into radial oil absorption lid is equipped with the cylindricality hole towards inside, the depression bar is installed at the cylindricality downtheholely, be equipped with the sealing washer between depression bar outer wall and the cylindricality downthehole wall.
The end surface of the pressing rod facing the spring is provided with an installation hole towards the inside, and the spring is fixed in the installation hole.
The adjusting rod is screwed with a nut, and the nut is tightly attached to the outer surface of the valve seat.
The rotating shaft of the male rotor is installed on the end cover flange through a bearing, and the outer end of the rotating shaft penetrates out of the end cover flange.
And an oil seal is arranged on the end cover flange at the outer side of the bearing of the male rotor.
And a sealing ring is arranged on the connecting end surface of the end cover flange and the screw pump shell.
The radial oil suction cover is mounted on the screw pump shell through a plurality of fastening bolts.
The utility model has the advantages that: the utility model discloses cover the disk seat setting at radial oil absorption, can adjust the distance of depression bar and case through adjusting the pole, and then change the compression degree of spring, change the pressure of relief valve, the pressure regulating is convenient, and external relief valve moreover can be according to the on-the-spot safe environment, changes the oil-out at the radial oil absorption lid of equidirectional, cooperation installation that can be better does not receive the restriction of business turn over hydraulic fluid port direction.
Drawings
Fig. 1 is a perspective view of the present invention;
FIG. 2 is a front view of the present invention;
FIG. 3 is a cross-sectional view A-A of FIG. 2;
FIG. 4 is a cross-sectional view taken along line B-B of FIG. 2;
FIG. 5 is a schematic view of a conveying cavity and a communication port inside a screw pump shell;
FIG. 6 is a structural view of a relief valve;
in the figure: 1-screw pump housing; 2-end cover flange; 3-radial oil suction cover; 4-an oil suction port; 5-oil outlet; 6-a delivery chamber; 7-male rotor; 8-female rotor; 9-a pressure relief channel; 10-a communication port; 11-a valve seat; 12-adjusting the rod; 13-a compression bar; 14-a spring; 15-a valve core; 16-a sealing ring; 17-a nut; 18-a bearing; 19-oil sealing; 20-a sealing ring; 21-fastening bolts;
the following detailed description will be made in conjunction with embodiments of the present invention with reference to the accompanying drawings.
Detailed Description
The invention will be further explained with reference to the following figures and examples:
as shown in fig. 1 to 6, a small flow screw pump with an external pressure regulating type safety valve comprises a screw pump housing 1, wherein an end cover flange 2 is installed at one end of the screw pump housing 1, a radial oil suction cover 3 is installed at the other end of the screw pump housing, an oil suction port 4 is arranged on one side wall of the radial oil suction cover 3, an oil outlet 5 is arranged on the side wall of the screw pump housing 1 close to the end cover flange 2, a conveying cavity 6 communicated with the radial oil suction cover 3 and the oil outlet 5 is arranged in the screw pump housing 1, a male rotor 7 and a female rotor 8 meshed with the male rotor 7 are installed in the conveying cavity 6, a pressure relief channel 9 is arranged at the bottom in the screw pump housing 1, a communication port 10 is arranged between the top of one end of the pressure relief channel 9 and the conveying cavity 6, the other end of the pressure relief channel 9 is communicated with the radial oil suction cover 3, and, an adjusting rod 12 is installed on the valve seat 11 in a threaded mode, one end, extending into the radial oil suction cover 3, of the adjusting rod 12 is connected with a pressing rod 13, the pressing rod 13 is connected with a spring 14, the other end of the spring 14 is connected with a valve core 15, and the valve core 15 extends into the pressure relief channel 9.
The inside terminal surface that disk seat 11 stretched into radial oil absorption cover 3 is equipped with the cylindricality hole towards inside, depression bar 13 is installed in the cylindricality is downthehole, be equipped with sealing washer 16 between depression bar 13 outer wall and the cylindricality downthehole wall.
The end surface of the pressure lever 13 facing the spring 14 is provided with an installation hole, and the spring 14 is fixed in the installation hole.
The adjusting rod 12 is screwed with a nut 17, and the nut 17 is tightly attached to the outer surface of the valve seat 11.
The rotating shaft of the male rotor 7 is installed on the end cover flange 2 through a bearing 18, and the outer end of the rotating shaft penetrates out of the end cover flange 2.
The end flange 2 is provided with an oil seal 19 on the outside of the bearing 18 of the male rotor 7.
And a sealing ring 20 is arranged on the connecting end surface of the end cover flange 2 and the screw pump shell 1.
The radial oil suction cover 3 is mounted on the screw pump housing 1 through a plurality of fastening bolts 21.
The utility model discloses set up disk seat 11 on radial oil suction cover 3, can adjust depression bar 13 and case 15's distance through adjusting pole 12, and then change spring 14's compression degree, change the pressure of relief valve, the pressure regulating is convenient, and external relief valve moreover can be according to the on-the-spot safe environment, changes the oil-out and radially inhales oil cover 3 in the equidirectional, cooperation installation that can be better does not receive the restriction of business turn over hydraulic fluid port direction.
The present invention has been described above with reference to the accompanying drawings, and it is obvious that the present invention is not limited by the above embodiments, and various improvements made by the method concept and technical solution of the present invention or directly applied to other occasions without improvement are all within the protection scope of the present invention.
Claims (8)
1. The small-flow screw pump with the external pressure-regulating safety valve is characterized by comprising a screw pump shell (1), wherein an end cover flange (2) is installed at one end of the screw pump shell (1), a radial oil suction cover (3) is installed at the other end of the screw pump shell, an oil suction opening (4) is formed in one side wall of the radial oil suction cover (3), an oil outlet (5) is formed in the side wall of the screw pump shell (1) and close to the end cover flange (2), a conveying cavity (6) communicated with the radial oil suction cover (3) and the oil outlet (5) is formed in the screw pump shell (1), a male rotor (7) and a female rotor (8) meshed with the male rotor (7) are installed in the conveying cavity (6), a pressure relief channel (9) is formed in the bottom of the screw pump shell (1), and a communication opening (10) is formed between the top of one end of the pressure relief channel, the oil suction device is characterized in that the other end of the pressure relief channel (9) is communicated with the radial oil suction cover (3), a valve seat (11) is installed on the outer end face of the radial oil suction cover (3), an adjusting rod (12) is installed on the valve seat (11) through threads, one end, extending into the radial oil suction cover (3), of the adjusting rod (12) is connected with a pressing rod (13), the pressing rod (13) is connected with a spring (14), the other end of the spring (14) is connected with a valve core (15), and the valve core (15) extends into the pressure relief channel (9).
2. The low-flow screw pump with the external pressure-regulating safety valve according to claim 1 is characterized in that one end surface of the valve seat (11) extending into the radial oil suction cover (3) is provided with a cylindrical hole facing inwards, the pressure rod (13) is installed in the cylindrical hole, and a sealing ring (16) is arranged between the outer wall of the pressure rod (13) and the inner wall of the cylindrical hole.
3. The low-flow screw pump with the external pressure-regulating safety valve according to claim 2, wherein the end of the pressure rod (13) facing the spring (14) is provided with a mounting hole facing inwards, and the spring (14) is fixed inside the mounting hole.
4. The low-flow screw pump with the external pressure-regulating safety valve according to claim 3, wherein the adjusting rod (12) is screwed with a nut (17), and the nut (17) is tightly attached to the outer surface of the valve seat (11).
5. The low-flow screw pump with the external pressure-regulating safety valve according to claim 4, characterized in that the rotating shaft of the male rotor (7) is mounted on the end cover flange (2) through a bearing (18) and the outer end of the rotating shaft penetrates out of the end cover flange (2).
6. A low-flow screw pump with an external pressure-regulating safety valve according to claim 5, characterised in that the end flange (2) is provided with an oil seal (19) outside the bearing (18) of the male rotor (7).
7. The low-flow screw pump with the external pressure regulating type safety valve according to claim 6, characterized in that the connecting end surface of the end cover flange (2) and the screw pump shell (1) is provided with a sealing ring (20).
8. The low-flow screw pump with an external pressure-regulating safety valve according to claim 7, characterized in that the radial oil suction cap (3) is mounted on the screw pump housing (1) by means of a number of fastening bolts (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021305136.0U CN212656976U (en) | 2020-07-07 | 2020-07-07 | Small-flow screw pump with external pressure regulating type safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021305136.0U CN212656976U (en) | 2020-07-07 | 2020-07-07 | Small-flow screw pump with external pressure regulating type safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212656976U true CN212656976U (en) | 2021-03-05 |
Family
ID=74759599
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021305136.0U Active CN212656976U (en) | 2020-07-07 | 2020-07-07 | Small-flow screw pump with external pressure regulating type safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212656976U (en) |
-
2020
- 2020-07-07 CN CN202021305136.0U patent/CN212656976U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9651048B2 (en) | Gas inlet valve for a compressor, compressor comprising a gas inlet valve of this type and method for operating a compressor comprising a gas inlet valve of this type | |
| WO1997001053A1 (en) | Dry seal contamination prevention system | |
| CN204476777U (en) | Multi-impeller Centrifugal electro-pump | |
| CN212656976U (en) | Small-flow screw pump with external pressure regulating type safety valve | |
| CN201461390U (en) | Pressure-regulating gear pump | |
| CN206036322U (en) | Modulation system guide relief valve | |
| CN108757249A (en) | A kind of safe small-sized external fuel oil pump | |
| CN101718361B (en) | Constant-pressure check valve | |
| CN207621005U (en) | A kind of diaphragm stabilized pressure pump | |
| CN107300029B (en) | Pressure limiting valve | |
| CN212745467U (en) | Explosion-proof valve joint | |
| CN108980428A (en) | Air compressor machine in-line relief valve | |
| CN213954516U (en) | Diaphragm type hydraulic control valve for preventing water hammer | |
| CN204921393U (en) | Vertical multistage pump | |
| CN212028554U (en) | Loading regulating valve | |
| CN212656980U (en) | Screw pump with external safety valve | |
| CN212177975U (en) | Pressure release valve with exhaust function | |
| CN207064235U (en) | Vane fuel supply pump provided with safety valve | |
| CN207740181U (en) | A kind of double outlet multipurpose external-mix self-priming pumps with similar spiral shape suction chamber | |
| CN208331741U (en) | A kind of lubricating oil pump equipped with plunger type pressure regulator valve | |
| CN112610536A (en) | Anti cavitation structure of fuel pump | |
| CN201582452U (en) | Constant pressure check valve | |
| CN205744474U (en) | A kind of direct connection gear up axial force balance formula self priming pump | |
| CN210135018U (en) | Fuel pump assembly | |
| CN107905986A (en) | A kind of membrane stabilized pressure pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 301800 No.1 Tianxing Road, energy saving and environmental protection industrial zone, Baodi District, Tianjin Patentee after: Hailink hydraulic technology (Tianjin) Co.,Ltd. Address before: 301800 No.1 Tianxing Road, energy saving and environmental protection industrial zone, Baodi District, Tianjin Patentee before: JINMAISI HYDRAULIC EQUIPMENT (TIANJIN) CO.,LTD. |