CN201377430Y - Built-in pressure protection device for single-screw refrigeration compressor - Google Patents
Built-in pressure protection device for single-screw refrigeration compressor Download PDFInfo
- Publication number
- CN201377430Y CN201377430Y CN200920042080U CN200920042080U CN201377430Y CN 201377430 Y CN201377430 Y CN 201377430Y CN 200920042080 U CN200920042080 U CN 200920042080U CN 200920042080 U CN200920042080 U CN 200920042080U CN 201377430 Y CN201377430 Y CN 201377430Y
- Authority
- CN
- China
- Prior art keywords
- valve
- pressure
- communicated
- port
- spool
- 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.)
- Expired - Lifetime
Links
Images
Landscapes
- Applications Or Details Of Rotary Compressors (AREA)
- Safety Valves (AREA)
Abstract
The utility model provides a built-in pressure protection device for single-screw refrigeration compressor, which adopts the structure that a safety valve, mainly comprising a valve body, an elastic element and a valve core, is arranged inside the casing of the refrigeration compressor; a valve chamber is formed inside the valve body; a valve port and a spout hole, which are communicated with the valve chamber, are formed on the valve body; the valve core, which corresponds to the valve port and is provided with a sealing part, is positioned in the valve chamber; the elastic element acts between the valve body and the valve core and forces the sealing part on the valve core to close the passage connected the valve port and the valve chamber; the valve port is communicated with a high-pressure chamber in the casing; and the spout hole is communicated with a low-pressure chamber in the casing. The scheme solves the problem of over-high air pressure in the high-pressure chamber inside the compressor because of sudden shut or bad air venting of an exhaust port due to misoperation or other reasons.
Description
Technical field
The utility model relates to a kind of single screw rod type refrigerating compressor, and the built-in pressure protective device of a kind of single screw rod type refrigerating compressor especially is set.
Background technique
Single screw rod type refrigerating compressor commonly used is to form engagement pair by the plane star-wheel of a screw rotor and two balanced configurations in casing, and the screw channel of screw rotor, chassis cavity and star-wheel tooth top plane three constitute the element volume of sealing.Casing is provided with intakeport and relief opening, is provided with the hyperbaric chamber and the low-pressure cavity of mutual isolating seal in casing inside, and wherein hyperbaric chamber is communicated with relief opening, and low-pressure cavity is communicated with intakeport.The screw rotor screw channel is communicated with low-pressure cavity before the star-wheel tooth is not engaging-in as yet, is in suction condition, and when power passed on the screw rotor, screw rotor just drove star-wheel rotation, and when screw rotor forwards certain position to, the star-wheel tooth seals screw channel, and breathing process finishes.Screw rod is rotated further, and along with the star-wheel tooth advances along screw channel, the swept volume of sealing is dwindled gradually, realizes the compression process of working medium, and when swept volume was communicated with hyperbaric chamber, compression process finished.Along with being rotated further of screw rotor, compressed working medium is delivered to exhaust duct by hyperbaric chamber through relief opening, till the star-wheel tooth breaks away from screw channel.
And in practical work process, often owing to misoperation or other certain reasons cause relief opening close suddenly or exhaust not smooth, and this moment is if screw rotor still works on, a large amount of low-pressure gas sucked and be compressed into pressurized gas enter hyperbaric chamber, then pile up the pressurized gas of discharging of not having enough time in a large number in the hyperbaric chamber, when exceeding the design pressure of body, the danger of body blast will be had.Existing most single screw rod type refrigerating compressor is not taked any protective gear at this explosion hazard; the single screw rod type refrigerating compressor of minority is the generation that prevents this explosion hazard; often be one safety valve to be set in the position of the outside relief opening of casing; when with hyperbaric chamber that relief opening is communicated with in pressure when surpassing the design pressure of body; this safety valve is opened the pressurized gas in it is directly released in the atmosphere; to alleviate the pressure in the hyperbaric chamber, make body keep safety.Because the pressurized gas in the hyperbaric chamber contain the overvoltage refrigeration agent, and this pressurized gas are directly released in the atmosphere, not only cause the waste of refrigeration agent, and atmospheric ozone layer is damaged, and are unfavorable for environmental protection.
Therefore, how solving single screw rod type refrigerating compressor internal high pressure intracavity gas overpressure and the hidden danger brought, and do not cause brokenly ring to external environment, is the utility model content of research emphatically.
Summary of the invention
The utility model provides a kind of single screw rod type refrigerating compressor built-in pressure protective device, and its purpose mainly is to solve in the prior art because of misoperation or other reasons cause relief opening to close suddenly or the problem of the compressor internal high pressure intracavity gas overpressure that exhaust does not freely bring.
For achieving the above object, the technical solution adopted in the utility model is: the built-in pressure protective device of a kind of single screw rod type refrigerating compressor, casing inside at described refrigeration compressor is provided with a safety valve, and this safety valve mainly is made up of valve body, elastic element and spool; Form valve pocket in the described valve body, valve body is provided with valve port and the overflow hole that is communicated with valve pocket; Described spool is positioned at valve pocket, and the corresponding valve port of spool is provided with sealed department, and sealing portion cooperates with valve port; Described elastic element acts between valve body and the spool, and forces sealed department close port on the spool to lead to the passage of valve pocket, and described valve port is communicated with hyperbaric chamber in the casing, and the interior low-pressure cavity of described overflow hole and casing is communicated with.
Related content in the technique scheme is explained as follows:
1, in the such scheme, the other end relative with valve port on the described valve body offers tapped hole, and one regulates bolt is located in this tapped hole, and this adjusting bolt acts on the elastic element.
2, in the such scheme, described elastic element is cylindrical spring or disk spring, and described disk spring can be one, also can be one group.
3, in the such scheme, described " sealed department " refers to the taper type on the spool end corresponding with valve port, and this taper type cooperates with sealing valve port, also can be the taper that cooperates with sealing valve port; This " sealed department " also can be set in " O " RunddichtringO on the spool.
4, submit a written statement to a higher authority in the scheme, described safety valve directly is installed on the outer wall in casing inner high voltage chamber, and its valve port is communicated with hyperbaric chamber, and its overflow hole is in the low-pressure cavity, thereby makes that compressor arrangement is simple, volume reduces.
Working principle of the present utility model is: when the air pressure in the hyperbaric chamber is higher than rated working pressure, pressurized gas promote spool by valve port and steadily move backward and pressure spring, open valve port, at this moment, hyperbaric chamber is communicated with low-pressure cavity, pressurized gas overflow by the overflow hole on the valve body, drain into low-pressure cavity from hyperbaric chamber, when gas pressure is reduced to rated working pressure in the hyperbaric chamber, spool steadily moves to the valve port position again under the effect of spring force, sealing valve port is closed, thereby low-pressure cavity and hyperbaric chamber are isolated once more, refrigeration compressor comes back to normal safe working state, guarantees the stable of system pressure.
After the pressurized gas that have refrigeration agent that hyperbaric chamber is discharged enter low-pressure cavity, continue to be recycled compression utilization, thereby reduced the waste of refrigeration agent, also avoided atmosphere environment is polluted.
Because the technique scheme utilization, the utility model compared with prior art advantage is:
1, because the danger when refrigeration compressor gas pressure in hyperbaric chamber surpasses the rated working pressure operation has been eliminated in application of the present utility model, avoided the loss of refrigeration agent simultaneously, reduced pollution atmosphere environment.
2, the utility model is simple in structure, and is compact, volume is little, and cost is low.
3, because the utility model adopts a safety valve to control the interior gas pressure of hyperbaric chamber, when gas pressure is higher than rated working pressure in the hyperbaric chamber, gas promotes spool and moves and open overflow hole, hyperbaric chamber is communicated with low-pressure cavity, thereby the pressure range that makes the hyperbaric chamber internal pressure be tending towards setting has guaranteed the stability of system pressure.
Description of drawings
Accompanying drawing 1 is the utility model structural representation;
Accompanying drawing 2 is the utility model working principle schematic representation.
In the above accompanying drawing: 1, casing; 2, intakeport; 3, relief opening; 4, low-pressure cavity; 5, hyperbaric chamber; 6, safety valve; 7, valve body; 8, spool; 9, valve core housing; 10, valve port; 11, overflow hole; 12, cylindrical spring; 13, regulate bolt.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described:
Embodiment:
As shown in Figure 1 and Figure 2; the built-in pressure protective device of a kind of single screw rod type refrigerating compressor; the casing 1 of compressor is provided with intakeport 2 and relief opening 3; be provided with the hyperbaric chamber 5 and the low-pressure cavity 4 of mutual isolating seal in casing 1 inside; wherein hyperbaric chamber 5 is communicated with relief opening 3, and low-pressure cavity 4 is communicated with intakeport 2.Casing 1 inside at described refrigeration compressor is provided with a safety valve 6, this safety valve 6 mainly is made up of valve body 7, cylindrical spring 12 (also can be disk spring) and spool 8, form valve pocket in the described valve body 7, valve body 7 is provided with valve port 10 and the overflow hole 11 that is communicated with valve pocket; Described spool 8 is positioned at valve pocket, and its corresponding valve port 10 1 ends are provided with the taper type that cooperates with valve port 10, and this taper type inserts in valve port 10, and valve port 10 is closed, and the other end is positioned in the valve pocket through valve core housing 9, and valve core housing 9 is along the valve pocket setting that endwisely slips; Described cylindrical spring 12 axially is provided with along valve port 10 and acts between valve core housing 9 and the valve body 7, act between valve body 7 and the valve core housing 9, and force taper type close port 10 on the spool 8 to lead to the passage of valve pocket by valve core housing 9, hyperbaric chamber 5 in described valve port 10 and the casing 1 is communicated with, and the interior low-pressure cavity 4 of described overflow hole 11 and casing is communicated with.
The bottom of described valve body 7 inner chambers offers tapped hole, and one regulates bolt 13 is located in this tapped hole, and this adjusting bolt 13 acts on the cylindrical spring 12.
During normal the operation, the exhaust pressure of hyperbaric chamber 5 is within its rated working pressure scope, and is relatively stable, and the spool 8 of safety valve 6 is positioned at valve port 10 positions, makes valve port 10 be in normally off, the refrigeration compressor safe operation.Suddenly close or exhaust when smooth when misoperation or other certain reasons cause relief opening 3, the pressurized gas in the hyperbaric chamber 5 are cumulative; When the air pressure in the hyperbaric chamber 5 is higher than rated working pressure, pressurized gas promote spool 8 by valve port 10, compress cylindrical spring 12 then, spool 8 steadily moves, open valve port 10, at this moment, hyperbaric chamber 5 is communicated with low-pressure cavity 4, and pressurized gas overflow by the overflow hole on the valve body 7 11, drains into low-pressure cavity 4 from hyperbaric chamber 5, when gas pressure is reduced to rated working pressure in the hyperbaric chamber 5, spool 8 steadily moves to intake valve port 10 positions again under the effect of spring 12 elastic force, valve port 10 is closed, thereby low-pressure cavity 4 is isolated once more with hyperbaric chamber 5, refrigeration compressor comes back to normal safe working state, guarantees the stable of system pressure.
After the pressurized gas that have refrigeration agent that hyperbaric chamber 5 is discharged enter low-pressure cavity 4, continue to be recycled compression utilization, thereby reduced the waste of refrigeration agent, also avoided atmosphere environment is polluted.
The foregoing description only is explanation technical conceive of the present utility model and characteristics, and its purpose is to allow the personage who is familiar with this technology can understand content of the present utility model and enforcement according to this, can not limit protection domain of the present utility model with this.All equivalences of being done according to the utility model spirit change or modify, and all should be encompassed within the protection domain of the present utility model.
Claims (3)
1, the built-in pressure protective device of a kind of single screw rod type refrigerating compressor is characterized in that: casing (1) inside at described refrigeration compressor is provided with a safety valve (6), and this safety valve (6) mainly is made up of valve body (7), elastic element and spool (8); Form valve pocket in the described valve body (7), valve body (7) is provided with valve port (10) and the overflow hole (11) that is communicated with valve pocket; Described spool (8) is positioned at valve pocket, and the corresponding valve port of spool (8) (10) is provided with sealed department, and sealing portion cooperates with valve port (10); Described elastic element acts between valve body (7) and the spool (8), and force sealed department close port (10) on the spool (8) to lead to the passage of valve pocket, hyperbaric chamber (5) in described valve port (10) and the casing (1) is communicated with, and the interior low-pressure cavity (4) of described overflow hole (11) and casing is communicated with.
2, the built-in pressure protective device of single screw rod type refrigerating compressor according to claim 1; it is characterized in that: described valve body (7) is gone up the other end relative with valve port (10) and is offered tapped hole; one regulates bolt (13) is located in this tapped hole, and this adjusting bolt (13) acts on the elastic element.
3, the built-in pressure protective device of single screw rod type refrigerating compressor according to claim 1 is characterized in that: described elastic element is cylindrical spring (12) or disk spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920042080U CN201377430Y (en) | 2009-04-03 | 2009-04-03 | Built-in pressure protection device for single-screw refrigeration compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920042080U CN201377430Y (en) | 2009-04-03 | 2009-04-03 | Built-in pressure protection device for single-screw refrigeration compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201377430Y true CN201377430Y (en) | 2010-01-06 |
Family
ID=41517538
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920042080U Expired - Lifetime CN201377430Y (en) | 2009-04-03 | 2009-04-03 | Built-in pressure protection device for single-screw refrigeration compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201377430Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105003413A (en) * | 2015-07-30 | 2015-10-28 | 江苏锐升新材料有限公司 | Screw compressor for floor processing |
| WO2023108924A1 (en) * | 2021-12-14 | 2023-06-22 | 广东美芝制冷设备有限公司 | Exhaust one-way valve for compressor, and compressor having same |
-
2009
- 2009-04-03 CN CN200920042080U patent/CN201377430Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105003413A (en) * | 2015-07-30 | 2015-10-28 | 江苏锐升新材料有限公司 | Screw compressor for floor processing |
| CN105003413B (en) * | 2015-07-30 | 2017-05-31 | 江苏锐升新材料有限公司 | A kind of screw compressor of floor processing |
| WO2023108924A1 (en) * | 2021-12-14 | 2023-06-22 | 广东美芝制冷设备有限公司 | Exhaust one-way valve for compressor, and compressor having same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201306286Y (en) | Double-screw liquefied gas pump by-pass valve | |
| WO2022083672A1 (en) | Electric control valve and fuel system | |
| CN201377430Y (en) | Built-in pressure protection device for single-screw refrigeration compressor | |
| CN202132564U (en) | Combined type multifunctional safety valve | |
| CN101943284B (en) | Surge protection relief valve | |
| CN209621101U (en) | A kind of explosion-proof pre-buried plugging during imminence of war door | |
| CN1414273A (en) | Normal open guiding type safety valve combined with blasting sheet | |
| CN204003451U (en) | A kind of screw-rod air compressor gas valve | |
| CN201487281U (en) | Safe explosion protection ball valve | |
| CN202008326U (en) | Explosion release device | |
| CN208749707U (en) | Commutation balance pile-up valve | |
| CN204573285U (en) | A kind of cylindrical valve servomotor cavity body structure and cylindrical valve servomotor | |
| CN107631047A (en) | Gas pipeline fracture blast self-closing valve | |
| CN201992164U (en) | Valve cover of high vacuum baffle valve | |
| CN202228214U (en) | Pressure regulating and pressure reducing device used for gas vehicle electric control jetting system | |
| CN216306837U (en) | High-low pressure protection device for biogas fermentation tank | |
| CN201391658Y (en) | Safe explosion-proof stop valve | |
| CN202327271U (en) | Automatic pressure reduction anti-explosion cover for oil filling port of oil immersed electric equipment | |
| CN203362318U (en) | Air inflow explosion-proof device of gas engine | |
| CN201818856U (en) | Pressure release valve for water attack protection | |
| CN219712446U (en) | Novel dustproof explosion-proof valve of high protection level | |
| CN202501017U (en) | Solenoid valve for automatic gas emergency cutoff | |
| CN211820149U (en) | Safety protection control hydraulic system of explosion-proof diesel engine | |
| CN210600361U (en) | Electromagnetic type gas stop valve convenient to maintain | |
| CN219933120U (en) | Pneumatic actuator with protection structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100106 |