Air valve
Technical field
The utility model relates to a kind of air valve.
Background technique
At present, air valve is the most key in a reciprocal compressor assembly, and the reliability of compressor operating and Economy are all closely bound up with the air valve design, at present main air valve or the air valve that adopts on the compressor.The air valve assembly comprises valve seat, limiter and the valve block between the two, the center of valve seat and limiter is equipped with through hole, the two utilizes described through hole bolt to connect, the other locating stud that is provided with of through hole, the end face of through hole protrudes from the described limiter body mating face relative with valve seat, and the discrepancy in elevation of the two is the maximum lift of permission.
On the mating face of limiter body, also be provided with a plurality of annular grooves of concentric setting, be provided with at the bottom of the annular groove porose, the spring that the installation and control valve block opens and closes in the hole, annular valve block is positioned at annular groove, the degree of depth of annular groove equals throttle slice thickness.Throttle slice thickness is greater than maximum lift, and therefore, valve block can be by annular groove wall guiding, and annular groove plays buffer function in the valve block opening process, can be so that air valve reduce the receptance of operating mode, thus improve air valve working life.
The air valve and the limiter thereof of existing structure have the following disadvantages: when lift is big, or after the valve block wearing and tearing, when throttle slice thickness during smaller or equal to lift, valve block just might break away from annular groove and unrestricted motion in air valve, air valve was lost efficacy or damages, and reliability is lower.
The model utility content
In order to overcome existing air valve and the lower deficiency of limiter reliability thereof, technical problem to be solved in the utility model provides a kind of reliability higher air valve limiter and air valve thereof.
The technological scheme that its technical problem that solves the utility model adopts is: air valve, comprise mutual coupling and interconnective valve seat and air valve limiter, described air valve limiter comprises the limiter body, the mating face of limiter body is provided with annular groove and through hole, the end face of through hole protrudes from described mating face, described mating face is provided with boss, the end face of described boss is higher than described mating face and is no more than the end face of through hole, and the part side of described boss and the cell wall of described annular groove are positioned on the same cylinder.
Described boss is arranged on the inboard or the outside of annular groove,
Described boss has at least two, and is disposed on the described mating face.
Described boss has at least three, and even, arranged concentric.
The beneficial effects of the utility model are: utilize a plurality of boss that are positioned at the annular groove side are set on mating face, the guiding length of valve block has extended, simple in structure, can obviously improve the reliability of air valve, simultaneously, the length dimension of boss is very little for the girth of annular groove, does not influence the air valve usability, especially is suitable for reciprocal compressor.
Description of drawings
Fig. 1 is existing air valve assembly schematic representation.
Fig. 2 is the schematic representation of air valve limiter in the utility model.
Fig. 3 is the left view of Fig. 2.
Fig. 4 is the schematic representation of air valve of the present utility model.
Be labeled as valve seat 1, spring 2, valve block 3, hole 4, annular groove 5, locking nut 6, locking nut 7, bolt 8, locating stud 9, air valve limiter 10, sealing gasket 11, boss 12, through hole 13, limiter body 14, mating face 15, air valve limiter 16, mating face 17 among the figure.
Be the clear lug boss position that shows, the end face blacking of boss shows in Fig. 2.
Embodiment
Below in conjunction with accompanying drawing the utility model is further specified.
As shown in Figure 1, existing air valve comprises valve seat 1, air valve limiter 16 and the valve block between the two 3, the center of valve seat 1 and air valve limiter 16 is equipped with through hole, the two utilizes described through hole bolt to connect, the other locating stud 9 that is provided with of through hole, the end face of through hole protrudes from the relative mating face 17 of described air valve limiter 16 and valve seat 1, and the discrepancy in elevation of the two is the maximum lift of permission.When lift is big, or after valve block 3 wearing and tearing, valve block 3 may detach annular groove, causes air valve to lose efficacy.
As shown in Figures 2 and 3, employed air valve limiter 10 comprises limiter body 14 in the air valve of the present utility model, the mating face 15 of limiter body 14 is provided with annular groove 5 and through hole 13, the end face of through hole 13 protrudes from described mating face 15, described mating face 15 is provided with boss 12, the end face of described boss 12 is higher than described mating face 15 and is no more than the end face of through hole 13, and the part side of described boss 12 and the cell wall of described annular groove 5 are positioned on the same cylinder.Boss 12 can be valve block 3 location under the situation of valve block 3 wearing and tearing or lift increasing, and valve block 3 is difficult for deviating from annular groove 5 and dissociates, and such air valve limiter reliability is higher, simultaneously, does not influence its normal function.
As shown in Figure 2, described boss 12 can be arranged on annular groove 5 outside radially, and described boss 12 also can be arranged on annular groove 5 inboard radially, and perhaps annular groove 5 outside and inboard radially is provided with simultaneously.
Preferred described boss 12 only is arranged on annular groove 5 outside radially, to valve clearance airflow influence minimum.
For controlling certain valve gap flow simultaneously, described boss 12 has at least two, and is disposed on the described mating face 15.
For guaranteeing to strengthen or still can reliably locate during valve block 3 wearing and tearing in lift, described boss 12 preferably has at least three, and evenly, arranged concentric.
As Fig. 2, Fig. 3 and shown in Figure 4, air valve of the present utility model, comprise the above-mentioned air valve limiter 10 that has valve block positioning boss structure and the valve seat with air-flow path 1 that is complementary with air valve limiter 10, the spring 2 that the control valve block opens and closes, three ring-type valve block 3 arranged concentric that differ in size are in the annular groove 5 of air valve limiter 10, locking nut 6,7 and bolt 8 that valve seat 1 is connected with air valve limiter 10, the locating stud 9 that valve seat 1 and air valve limiter 10 are positioned, the aluminium pad 11 that gas in the cylinder is sealed.Compressor expands at the end, the active force that the gas pressure difference that exists between cylinder and the air valve causes can overcome the mass force of valve block 3 and the spring force of spring 2 is opened valve block 3, and the gas at compressor mouth of pipe place can enter cylinder by the passage of valve seat 1 and air valve limiter 10.
In order to control certain valve gap flow, sometimes must adopt the method that strengthens valve lift to realize, promptly adjust the distance between the end face of mating face 15 on the limiter body 14 shown in Figure 2 and the through hole 13 on the air valve limiter 10, but existing air valve is when lift is excessive, because valve block 3 location are highly too short, can from annular groove 5, run out of and cause air valve to damage inefficacy in advance because processing or assembly error cause valve block 3 normally to locate.
As shown in Figures 2 and 3, in order not allow valve block 3 from annular groove 5, run out of, and can control certain valve gap flow, side at annular groove 5 is provided with a plurality of boss 12 that are provided with at interval, as shown in Figure 4, described boss 12 can position valve block 3, avoid valve block 3 because processing or assembly error cause can't positioning phenomenon, improved the practicability of air valve.