CN2194422Y - Gas valve for mechanical vacuum pump - Google Patents
Gas valve for mechanical vacuum pump Download PDFInfo
- Publication number
- CN2194422Y CN2194422Y CN 94238935 CN94238935U CN2194422Y CN 2194422 Y CN2194422 Y CN 2194422Y CN 94238935 CN94238935 CN 94238935 CN 94238935 U CN94238935 U CN 94238935U CN 2194422 Y CN2194422 Y CN 2194422Y
- Authority
- CN
- China
- Prior art keywords
- valve
- gas
- cap
- valve head
- ballasting
- 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
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- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The utility model is the element of a vacuum pump, which is used for abstraction condensable gas, which can directly affect the performance of the vacuum pump. The utility model greatly improves the original structure, the connection of a lower valve head and the pump is changed into the ball head inserting into an air ballast hole, and a sealing ring is arranged on a ball body. An air ballast cap is made of metal material, the bottom of the air ballast cap is fixed by a check ring via the bore, and the bottom surface of the bottom of the air ballast cap is provided with a sealing gasket. In this way, the utility model is convenient for dismounting and adjusting the air ballast valve, the sealing performance and the operational reliability of the valve are also improved, and therefore, the working performance of the vacuum pump is enhanced.
Description
The utility model relates to a kind of pump that is used to obtain the specific use of vacuum.
Gas ballast valve is used for extracting condensable gas, and the vacuum pump performance is had direct influence, and existing gas ballast valve is installed on the pump cover or the pump housing, has plenty of the mode that is threaded that adopts; Have plenty of and adopt the direct-insert mode of pipe, the latter also puts the red copper cover on cylindrical, often have deviation during installation, if with mounting hole not on same shaft axis, regular meeting leaks, and is threaded in addition also to make seal ring damage inefficacy; Also be provided with the additional oil circuit of vacuum pump rotor seal oil on some gas ballast valve, return oily phenomenon in the time of also can causing termination of pumping.In a word, existing gas ballast valve exists the poor sealing performance of installation place, and part damages easily and shortcomings such as inconvenience are regulated in dismounting.
The purpose of this utility model is that a kind of dismounting of design is easy to adjust, good seal performance is installed, the service-strong gas ballast valve.
The purpose of this utility model is: gas ballast valve and pump cover, or the following valve head employing sphere structure that the gas ballasting hole connects on the pump housing, and seal ring is installed on spheroid, realize.In order to improve the service behaviour of gas ballast valve, the utility model gas ballast valve also can adopt the suction pressure adjustable structure on this basis; The use pressing plate pine of gas ballast valve on fuel tank shell overlapped the compression type structure; The gas ballasting cap adopts improvement such as demountable structure, with the performance and the functional reliability of further raising gas ballast valve.
Accompanying drawing 1 is the structural representation of the utility model gas ballast valve, and Fig. 2 is the sealing oil circuit of the two ends of rotor face set up.1 is the gas ballasting cap among the figure, 2 be the gas ballasting cap at the bottom of, 3 is last valve head, 4 is valve seat, 5 is pressing plate, 6 is steel ball, 7 is fuel tank, 8 is spring, 9 are valve head down, 10 is pump cover (body).
Provide embodiment of the present utility model in conjunction with the accompanying drawings.
The utility model gas ballast valve is made up of gas ballasting cap 1, last valve head 3, valve seat 4 and parts such as following valve head 9 and steel ball 6 springs 8.Gas ballasting cap 1 shape is as a swivel nut, the lower end endoporus is processed with screw thread, with last valve head 3 for being threaded, gas ballasting cap 1 top has a groove, and the mounting hole ring washer is used for fixing at the bottom of the gas ballasting cap that is installed in the inner chamber 2,2 lower plane is provided with sealing gasket at the bottom of the gas ballasting cap, or as provide among the figure for " O " shape sealed picture, regulate the length that is threaded, can realize the switch of gas ballast valve, promptly tighten gas ballasting cap 1, because 2 are adjacent to mutually with last valve head 3 at the bottom of the gas ballasting cap, and the seal ring sealing is arranged, gas ballast valve just is in closed condition, unscrew gas ballasting cap 1,2 throw off with last valve head 3 at the bottom of the gas ballasting cap, and this moment, air entered valve head 3 middle parts by aperture and thread pitch, gas ballast valve unlatching this moment.Because the turn of gas ballasting cap 1 is frequent, therefore need employing wear-resistant, on-deformable metallic material, structure of the present utility model makes the gas ballast valve switch convenient, not fragile, reliable operation.Valve seat and last valve head 3 are for being threaded, valve seat and steel ball 6, spring 8, last valve head 3 are formed a typical can regulate suction pressure and ball valve, wherein steel ball 6 is withstood in valve seat 4 lower ends, steel ball 6 pressure springs 8, spring places the cavity of valve head 3, the upper-lower position of regulating valve seat 4 in last valve head 3 can change the rigidity of spring 8, thereby realizes the adjusting of gas ballasting degree of vacuum.Gas ballast valve adopts pressing plate 5 will go up valve head 3 in the connection of fuel tank 7 and is pressed on the fuel tank shell, has on the last valve head to be loose nested structure between a convex shoulder pressing plate and the convex shoulder, and the bottom plane of last valve head 3 is provided with seal ring, makes it have good air-tightness.The last valve head 3 of gas ballast valve is connected in aggregates with following valve head 9, can one process, also can be welded into one by two parts, there is the air flue of connection inside, the lower end of following valve head, the part of promptly inserting the pump housing or pump cover is a spheroid, have a groove on the outer surface of ball, be used for installing seal ring, such linkage structure has easy accessibility, installation requirement is low, can not damage the characteristics of seal ring.After using this gas ballast valve, owing to do not establish oil duct in the valve, therefore need join an additional oil circuit as shown in Figure 2 in addition, be provided with safety check control in the additional oil circuit, to increase sealing to the rudimentary two ends of rotor face or the single-stage pump two ends of rotor face of two-stage pump, can improve the gas ballasting performance of pump like this, on oil circuit, be provided with safety check, when pump is quit work, cut off oil circuit, prevent to produce and return oil, even gas ballast valve left also same effect can be arranged this moment, this has just improved original gas ballasting and has not closed, and will produce the defective of returning oil.
The sliding-vane-type vacuum pump of the utility model gas ballast valve particularly suitable eccentric rotor also can support the use with other vavuum pump, makes pump have better service behaviour, and it has easy accessibility, the characteristics of good airproof performance and reliable operation.
Claims (6)
1, a kind of oil-sealed rotary pump gas ballast valve, it is made up of gas ballasting cap, last valve head, valve seat, following valve head and parts such as steel ball, spring, it is characterized in that gas ballast valve is a sphere structure with the following valve head that gas ballasting hole on the pump cover or the pump housing is connected, and seal ring is installed on spheroid.
2, according to the said gas ballast valve of claim 1, it is characterized in that valve adopts the valve seat lower end to withstand steel ball, steel ball pressure spring, spring places the valve suction pressure adjustable structure of valve head cavity.
3, according to the said gas ballast valve of claim 1, it is characterized in that a convex shoulder is arranged on last valve head, with pressing plate valve head is pressed on the fuel tank shell, between pressing plate and convex shoulder loose nested structure, the bottom plane of last valve head is provided with seal ring.
4,1 said gas ballast valve as requested is characterized in that having a groove on gas ballasting cap endoporus top, and mounting hole fixes with ring washer at the bottom of the gas ballasting cap, is provided with sealing gasket below at the bottom of the gas ballasting cap.
5, according to the said gas ballast valve of claim 1, it is characterized in that the gas ballasting cap adopts metallic material, be connected with last valve head with screw thread, the lower plane at the bottom of the gas ballasting cap is equipped with sealing gasket.
6, according to the said gas ballast valve of claim 1, it is characterized in that being provided with in addition the additional oil circuit of a safety check control, oil circuit includes working connection and additional oil circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94238935 CN2194422Y (en) | 1994-06-22 | 1994-06-22 | Gas valve for mechanical vacuum pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94238935 CN2194422Y (en) | 1994-06-22 | 1994-06-22 | Gas valve for mechanical vacuum pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2194422Y true CN2194422Y (en) | 1995-04-12 |
Family
ID=33846243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94238935 Expired - Lifetime CN2194422Y (en) | 1994-06-22 | 1994-06-22 | Gas valve for mechanical vacuum pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2194422Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102678519A (en) * | 2012-05-18 | 2012-09-19 | 威海戥同测试设备有限公司 | Novel gas ballast valve |
| CN112761955A (en) * | 2021-01-18 | 2021-05-07 | 浙江飞越机电有限公司 | Gas ballast structure for rotary-vane vacuum pump |
-
1994
- 1994-06-22 CN CN 94238935 patent/CN2194422Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102678519A (en) * | 2012-05-18 | 2012-09-19 | 威海戥同测试设备有限公司 | Novel gas ballast valve |
| CN102678519B (en) * | 2012-05-18 | 2014-09-17 | 威海戥同测试设备有限公司 | Novel gas ballast valve |
| CN112761955A (en) * | 2021-01-18 | 2021-05-07 | 浙江飞越机电有限公司 | Gas ballast structure for rotary-vane vacuum pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |