CN2688897Y

CN2688897Y - Oil-shortage preventer of air compressor

Info

Publication number: CN2688897Y
Application number: CN 200420043084
Authority: CN
Inventors: 计高凌
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-02-26
Filing date: 2004-02-26
Publication date: 2005-03-30
Anticipated expiration: 2014-02-26

Abstract

The utility model relates to an oil-shortage protection device of an air compressor, which comprises a box body. The interior of the box body is a totally-enclosed oil chamber, wherein, the upper part and the lower part of the oil chamber are separately provided with a connecting head of balancing air current pipes and a connecting head of oil pipes. The internal cavity of the oil chamber is provided with a sensor, wherein, a downward guide rod is arranged on an outer shell of the sensor, magnetic floats are sheathed on the guide rod, and the lower end of the guide rod is fixed with an iron barrier chip. A reset device is installed between the guide rod and the oil chamber. When an air compressor is short of oil, the protection device cuts off a power supply of the air compressor automatically, and can effectively prevent the failures caused by oil shortage, such as the lock of a crankshaft, the break of a connecting rod, the drawing damage of a piston cylinder barrel, etc. The utility model has the advantages of simple structure and low production cost. In addition, the double magnetic floats and the iron barrier chip are arranged in the device, so that the utility model can effectively avoid that the compressor can be burnt out due to the intermittent on-off of the control circuit, and the intermittent on-off of the control circuit is caused by the instable state of the sensor due to the fluctuation of an oil face at the critical point of oil shortage.

Description

Air compressor oil starvation protective gear

Technical field

The utility model relates to the air compression machine technology, specifically is a kind of air compressor oil starvation protective gear.

Background technique

Air compressor in working order down, the body temperature height, the piston reciprocating speed is fast, oil supply is big, needs frequently to refuel, and owing to can produce very big noise during air compressor work, often be positioned under the external environment condition, therefore manageability not, often takes place that the bent axle that oil starvation causes is locked, connecting rod cracking, piston cylinder bucket draw faults such as bad, its maintenance expenses is hundreds of unit at least, thousands of at most units, and influence production, very harmful.

Summary of the invention

In order to overcome the prior art above shortcomings, the utility model provides a kind of simple in structure, air compressor oil starvation protective gear that cost of production is low.

The utility model air compressor oil starvation protective gear comprises casing 1; in the casing 1 is totally-enclosed grease chamber 2; 2 upper and lowers, described grease chamber are provided for connecting the balance gas flow tube connecting head 13 and the connector of oil pipes of oil 9 of air compressor crankcase respectively; sensor installation 4 on the support 3 of grease chamber's 2 inner chambers; one straight down guide rod 5 is set on sensor 4 shells; socket magnetic float 6 on the guide rod 5; guide rod 5 lower ends are iron washer 7 fixedly, and the resetting means of the magnetic float 6 that is used to reset is installed between described guide rod 5 and the grease chamber 2.

This air compressor oil starvation protective gear cuts off the power supply of air compressor automatically when the air compressor oil starvation, can prevent effectively that the bent axle that oil starvation causes is locked, connecting rod cracking, piston cylinder bucket draw faults such as bad, and it is simple in structure, cost of production is low.In addition, in device, be provided with two magnetic floats and iron catch, when oil level drops to the oil starvation transition point, two magnetic floats and the adhesive of iron catch, sensor is disconnected, can effectively avoid when the oil starvation transition point pasta fluctuation to cause the sensor states instability, logical when disconnected when causing control circuit compressor be burnt out.

Description of drawings

Fig. 1 a, b are the structural representation of the utility model exemplary embodiments;

Fig. 2 is the connection diagram of itself and air compressor crankcase;

Fig. 3 is the wiring schematic diagram of itself and air compressor.

Specific embodiment

Below in conjunction with embodiment's accompanying drawing this air compressor oil starvation protective gear is further specified.

Air compressor oil starvation protective gear shown in Figure 1 comprises casing 1; casing 1 inner chamber left side is totally-enclosed grease chamber 2; casing 1 inner chamber right-hand part can be the control room 8 of installation and control circuit; described grease chamber 2 left upper portion are provided for connecting the balance gas flow tube connecting head 13 of air compressor crankcase; bottom, 2 left side, grease chamber is provided for connecting the connector of oil pipes of oil 9 of air compressor crankcase; grease chamber's 2 leading flanks are provided with oval oily window 17; described grease chamber 2 inner chambers are by support 3 sensor installations 4; one straight down guide rod 5 is set on sensor 4 shells; socket magnetic float 6 on the guide rod 5; guide rod 5 lower ends are iron washer 7 fixedly; the resetting means of the magnetic float 6 that is used to reset is installed between described guide rod 5 and the grease chamber 2; this resetting means comprises plastics shift fork 11; the bearing 10 of shift fork 11 1 ends and 2 bottom surfaces, grease chamber is coupling; between shift fork 11 middle parts and 2 bottom surfaces, grease chamber an extension spring 12 is set; shift fork 11 the other ends are opening end; this opening end is positioned at iron catch 7 lower ends of guide rod 5; the handle 16 of described shift fork 11 is placed through on the front side plate of casing 1; stir handle 16 with hand; shift fork 11 can be stirred magnetic float 6 and move up along guide rod 5, the purpose of the magnetic float 6 of realizing resetting.

In the present embodiment, described magnetic float 6 adopts two magnet floats, and this pair magnet float is by common float and be arranged at buoy upper and the magnet of bottom is formed.In actual applications, magnetic float 6 float that also can adopt magnetic material to make.

The described sensor 4 of this air compressor oil starvation protective gear adopts magnetic reed switch, in the practical application, also can adopt other magnetic sensor.

With reference to Fig. 2, narrate the installation method of this air compressor oil starvation protective gear:

1, oil pipe 18 is installed between the connector of oil pipes of oil of the connector of oil pipes of oil of this air compressor oil starvation protective gear 1 lower end and air compressor crankcase 20 lower ends; and regulate the height of described oil starvation protective gear, make oil level shown in its oily window and crankcase 20 oil oil level shown in the window on same horizontal line.

2, tracheae 19 is installed between the balance gas flow tube connecting head of the balance gas flow tube connecting head of described oil starvation protective gear 1 upper end and air compressor crankcase 20 upper ends.

The utility model both can with the supporting use of single-phase air compressor, also can with the supporting use of three-phase air compressor.

Fig. 3 is this air compressor oil starvation protective gear and the three-phase air compressor wiring diagram when supporting.As shown in FIG., sensor K1, contactor L1 and its normally-closed contact C21 constitute the pressure control circuit of air compressor, and normally opened contact C11, the C12 of contactor L1, C13 are connected in the major loop of air compressor motor M.

Narrate the working procedure of this air compressor oil starvation protective gear below:

The oil level that oil level in this protective gear grease chamber 2 is followed in the air compressor crankcase 20 changes; magnetic float 6 in the grease chamber 2 descends along with the decline of oil level in the grease chamber 2; when magnetic float 6 drops to the oil starvation transition point;

magnetic float

6 and 7 adhesives of iron washer; magnetic reed switch K1 disconnects, and causes control loop to disconnect the coil L1 dead electricity of contactor; make to be connected to compressor major loop normally opened contact C11, C12, C13 disconnection, compressor quits work.This moment, operator backed out the plug cock 21 on the threeway gas flow tube joint at oil hole position, compressor crankcase 20 upper end, refuel to suitable oil level, after reclosing pipeline, stirring the handle 16 of shift fork 11 throws off magnetic float 6 from iron washer 7 one ends, the magnetic float 6 floating pastas of going up make magnetic reed switch K1 conducting, and control loop is connected, and the coil L1 of contactor gets, normally opened contact C11, C12, C13 closure, air compressor must be established beginning work by cable.

This air compressor oil starvation protective gear is provided with green indicating lamp 14 and red led 15 in addition, and green indicating lamp 14 was bright when the air compressor oil level under the working state was normal, and afterwards red led 15 is bright because of oil starvation quits work for compressor.

The oil level of this air compressor oil starvation protective gear in air compressor crankcase drops to when setting oil level; power supply that can the automatic disconnection air compressor; send alarm signal simultaneously; avoid air compressor owing to oil starvation produces fault; both can save manpower and maintenance expenses; can effectively improve the trouble free service performance of air compressor again; prolong its working life; in addition; in device, be provided with two magnetic floats and metal catch; when oil level drops to the oil starvation transition point; two magnetic floats and the adhesive of iron catch; sensor disconnects, and can avoid effectively that the pasta fluctuation causes the sensor states instability when the oil starvation transition point, logical when disconnected when causing control circuit compressor is burnt out.

Claims

1; air compressor oil starvation protective gear; comprise casing (1); in the casing (1) is totally-enclosed grease chamber (2); it is waited to levy and is: upper and lower, described grease chamber (2) is provided for connecting the balance gas flow tube connecting head (13) and the connector of oil pipes of oil (9) of air compressor crankcase respectively; the support (3) of grease chamber (2) inner chamber is gone up sensor installation (4); one straight down guide rod (5) is set on sensor (4) shell; guide rod (5) is gone up socket magnetic float (6); guide rod (5) lower end is iron washer (7) fixedly, and the resetting means of magnetic float (6) that are used to reset is installed between described guide rod (5) and grease chamber (2).

2, air compressor oil starvation protective gear according to claim 1; it is characterized in that: described resetting means comprises shift fork (11); the bearing (10) of shift fork (11) one ends and bottom surface, grease chamber (2) is coupling; between shift fork (11) middle part and the bottom surface, grease chamber (2) extension spring (12) is set; shift fork (11) the other end is an opening end, and this opening end is positioned at the lower end of the iron catch (7) on the guide rod (5).

3, air compressor oil starvation protective gear according to claim 2 is characterized in that: described shift fork (11) is the plastics shift fork.

4, air compressor oil starvation protective gear according to claim 1 is characterized in that: described magnetic float (6) is two magnet floats, and this pair magnet float contains float, and the upper and lower of float is equipped with magnet.

5, air compressor oil starvation protective gear according to claim 1 is characterized in that: described sensor (4) is a magnetic reed switch.

6, air compressor oil starvation protective gear according to claim 1 is characterized in that: (2) one sides, described grease chamber are provided with oily window (17).