CN206571990U - A kind of SMC types pressure regulation filter - Google Patents

Abstract

The utility model discloses a kind of SMC types pressure regulation filter, it includes bonnet, valve body and valve element, and bonnet, which is located in the top of valve body, bonnet, is provided with regulation component；Wherein, valve body is sealed between upper chamber, and the periphery of upper chamber and bonnet by sealing ring towards offering in the one side of bonnet, and valve element part is stretched in upper chamber；Piston is provided with bonnet, one end of one end of piston and the spring of regulation component offsets, the other end is stretched into upper chamber and offseted with valve element；Piston is set with bonnet in slip, and piston and the face that bonnet is slided are sealing surface；The utility model has the advantage that：With more stablize, sealing effectiveness is more preferable the characteristics of.

Description

A kind of SMC types pressure regulation filter

Technical field

The utility model is related to a kind of SMC types pressure regulation filter.

Background technology

SMC type pressure regulation filters are in pneumatic field extensive use, and it is mainly acted on diaphragm unit by adjusting part Carry out the aperture of adjusting spool, so as to adjust the pressure size of port of export gas.

As Fig. 1 discloses a kind of existing SMC types pressure regulation filter, it includes valve body 1, bonnet 2, diaphragm 3, core assembly And cup 4；Valve body is provided with regulation component, and the upper surface of the spring 5 and diaphragm 3 of regulation component offsets；Diaphragm 3 is located at valve body Upper chamber 6 is formed between 1 and bonnet 2, and between valve body 1 and diaphragm 3；The left side of valve body 1 offers air inlet 7, the right side of valve body Side offers gas outlet 8, and gas outlet 8 is connected with upper chamber 6；Air inlet 7 is connected to be further opened with the inner chamber of cup 4, valve body 1 Head piece 9, overcurrent mouth 9 connects upper chamber 6 with the inner chamber of cup 4；The valve element 10 of core assembly stretches to upper chamber by overcurrent mouth 9 Lower surface in 6 with diaphragm 3 offsets；Valve element 10 is provided with step surface 11, by controlling the distance of step surface 11 and overcurrent mouth 9 come real Now adjust the pressure size of the gas of gas outlet 8.

Existing such a SMC types pressure regulation filter, its regulative mode is to turn adjusting part so that the pressure increase of spring Or reduce so that diaphragm increases or reduced to the pressure of valve element so that the increase of the distance between step surface and overcurrent mouth or Reduce, so as to realize the size of regulation gas outlet gas pressure.

But existing such a SMC types pressure regulation filter, can by accompanying drawing using diaphragm seal between its bonnet and valve body Know its sealed principle, sealed using the upper surface of diaphragm and the lower surface of bonnet, it is close using the lower surface and valve body of diaphragm Envelope；Sealing is gone using the entire surface of diaphragm, and such a sealing means are very high to the design requirement of diaphragm.If design accuracy It is poor sealing it is not close when, because the pressure oscillation of inlet port is more severe, diaphragm can be shaken, work as air pressure fluctuation Frequency it is consistent with the intrinsic frequency that diaphragm works when, diaphragm can send the noise of " puff puff " so that the gas atmosphere of gas outlet Unstable, diaphragm may be directly damaged when serious causes whole SMC types pressure regulation filter to be scrapped.

The content of the invention

There is provided a kind of SMC types pressure regulation filter for problem above for the utility model.

A kind of SMC types pressure regulation filter, it includes bonnet, valve body and valve element, and bonnet is located in the top of valve body, bonnet Provided with regulation component；Wherein, valve body leads between upper chamber, and the periphery of upper chamber and bonnet towards offering in the one side of bonnet Sealing ring sealing is crossed, valve element part is stretched in upper chamber；Piston, one end of piston and the spring of regulation component are provided with bonnet One end offset, the other end is stretched into upper chamber and offseted with valve element；Piston is set with bonnet in slip, and piston is slided with bonnet Face be sealing surface.

Compared with prior art, the utility model is adopted the structure, and bonnet is realized instead of diaphragm first with sealing ring Sealing between valve body, the sealing principle of sealing ring seals for extrusion pressing type, is realized and sealed using the compressive deformation of seal, phase It is more more stable than its sealing effectiveness in diaphragm, and requirement on machining accuracy is low, and will not be because of inlet port gas ripple after sealing Movable property life vibration；Secondly the aperture regulation of valve element is realized instead of diaphragm using piston, and piston is partly to be arranged in upper chamber , it is predominantly located among bonnet, therefore piston also will not be because inlet port pressed gas is fluctuated and produces and rocks.Cause This, the utility model compared to prior art diaphragm type structure, with more stablize, sealing effectiveness is more preferable the characteristics of.

Wherein, the sealing ring is O-ring seal or rectangular seal.

Wherein, valve body surrounds upper chamber towards annular groove, annular groove is offered in the one side of bonnet, and sealing ring part is located at In annular groove.

Adopt the structure, be easy to the positioning and installation of sealing ring so that valve body, bonnet and sealing ring are assembled up More facilitate.

Wherein, storage tank is offered on the side surface of the piston, O-ring part is located in storage tank, the side table of piston Face passes through O-ring and valve bonnet seal.

Adopt the structure and allow piston to realize slip, while sliding surface is also in sealing state.

Wherein, the O-ring is nitrile rubber O-ring.

Nitrile rubber O-ring is a kind of known sealing ring, and its coefficient of friction is relatively low, and frictional dissipation is less, thus by its Sealed effect can not only be played by being set with piston, can also improve service life.

Wherein, regulation component also includes handwheel, coordinated with handwheel in the lifting screw being linked and lifting screw screw thread Nut, another end nut of spring offsets；The handwheel can be rotated relative to bonnet.

Using such a mode, it by turning handwheel, can both realize that nut was moved, so as to control the flexible of spring, promote Piston movement.

Wherein, lifting screw includes nut portion and threaded portion, and nut portion is stretched out by the upper surface of bonnet；Handwheel Bonnet top is placed on, handwheel is realized with nut portions split-phase card and linked.

Using such a mode so that overall to seem that structure is compacter, because handwheel is placed on bonnet top, itself and nut Part is the relation of clamping, therefore nut portion also can concomitant rotation when turning handwheel.

Wherein, the one side of the piston towards spring offers spring locating slot, and spring locating slot is stretched into one end of spring In.

Adopt the structure so that one end of spring can be extend into spring locating slot, improve between spring and piston Stability, and be conducive to the assembling of spring.

Wherein, stepped cavity is offered in the bonnet, the stepped cavity includes smaller portions and major part, The nut is located in smaller portions, and piston is located in major part.

Wherein, the major part perisporium of stepped cavity is provided with reinforcement, and reinforcement is located at the top of piston.

The setting of reinforcement, can increase the intensity of bonnet, while reinforcement is located at the upper end of piston, and install piston When, the lower surface of its upper surface and reinforcement is offseted in the major part that can directly place it in stepped cavity.

Brief description of the drawings

Fig. 1 is the sectional view of SMC types pressure regulation filter in the prior art；

Fig. 2 is sectional view of the present utility model.

Embodiment

Below in conjunction with specific embodiments and the drawings, the utility model is described in further detail：

Embodiment one, as shown in Figure 2, a kind of existing SMC types pressure regulation filter, it include valve body 1, bonnet 2, piston 3, Core assembly, cup 4 and regulation component.

Stepped cavity is offered in bonnet 2, stepped cavity includes smaller portions 51 and major part 52, and larger portion 52 are divided to be located at lower section, smaller portions 51 are above；The lower surface of bonnet 2 is provided with opening.The major part 52 of stepped cavity Inwall be provided with reinforcement 6.The setting of reinforcement 6, can increase the intensity of bonnet 2, while reinforcement 6 is located at piston 3 Upper end, and when installing piston 3, make its upper surface and reinforcement in the major part 52 that can directly place it in stepped cavity The lower surface of muscle 6 offsets.

Regulation component includes handwheel 7, lifting screw, nut 8.Lifting screw includes nut portion 91 and threaded portion 92, it is located in stepped cavity.Nut portion 91 is matched somebody with somebody through stretching behind the upper surface of bonnet 2, threaded portion 92 with nut 8 Close so that nut 8 is located in the smaller portions 51 of stepped cavity.Handwheel 7 is placed on the top of bonnet 2 and is connected with bonnet 2 to rotate, Handwheel 7 mutually blocks realization linkage with nut portion 91, that is, lifting screw can be rotated when rotating handwheel 7, so that Nut 8 is moved.

The part of piston 3 is located in the major part 52 of stepped cavity, and positioned at the lower section of reinforcement 6, piston 3 and rank Ladder type cavity is set to slide, and is offered on the side surface of piston 3 in storage tank 10, storage tank 10 provided with nitrile rubber O It is sealing relationship that type circle 11, i.e. piston 3, which can slide piston 3 and stepped cavity simultaneously,.Piston 3 offers spring on upper surface Locating slot 12.

Spring 13 is arranged in stepped cavity, and one end offsets with the lower surface of nut 8, and the other end extend into spring locating slot Offseted in 12 with piston 3.Handwheel 7 is turned so that lifting screw rotates, so that spring 13 is moved down or moved up, to adjust work Fill in the active force of 3 pairs of valve elements.

Valve body 1 is located at the lower section of bonnet 2, is fixed between valve body 1 and bonnet 2 using bolt, such a fixed form is known Technology, is not repeated here herein.The upper surface of valve body 1 is realized by sealing ring 14 with the lower surface of bonnet 2 and sealed, specific to seal Structure offers around upper chamber 18 for the upper surface of bonnet 21 and sealing ring 14 is provided with annular groove 15, annular groove 15, works as valve After lid 21 is assembled with bonnet 2, the deformation of sealing ring 14 is so as to realize sealing.

The left surface of valve body 1 is provided with air inlet 16, and the right flank of valve body 1 is provided with gas outlet 17, and the upper surface of valve body 1 is opened up There is upper chamber 18, gas outlet 17 is connected with upper chamber 18.Air inlet 16 is connected with the inner chamber of cup 4, and valve body is provided with overcurrent mouth 19, overcurrent mouth 19 connects the inner chamber of cup 4 with upper chamber 18.

Core assembly includes valve element, valve core spring 13 etc., and specifically composition is known technology to core assembly, is not added with herein To repeat.The lower surface that valve element part is extended in upper chamber 18 with piston 3 by overcurrent mouth 19 offsets.Valve element is located at overcurrent mouth 19 Son is provided with cascaded surface 20, the gap changed between cascaded surface 20 and overcurrent mouth 19 is moved by valve element, so as to adjust gas outlet 17 Gas pressure.

Specific pressure regulation step is as follows：By rotating handwheel 7, lifting screw is caused to rotate so that the position of nut 8 is offset, and is led The deformation of spring 13 is caused, driving piston 3 is moved so that valve core movement, the space change between influence cascaded surface 20 and overcurrent mouth 19, Reach the effect of the gas pressure of regulation gas outlet 17.

Claims (10)

1. a kind of SMC types pressure regulation filter, it includes bonnet, valve body and valve element, and bonnet, which is located in the top of valve body, bonnet, to be set There is regulation component；It is characterized in that：Valve body towards offering upper chamber in the one side of bonnet, and upper chamber periphery and bonnet it Between sealed by sealing ring, valve element part is stretched in upper chamber；It is provided with piston in bonnet, one end of piston and regulation component One end of spring is offseted, and the other end is stretched into upper chamber and offseted with valve element；Piston is set with bonnet in slip, and piston and bonnet The face of slip is sealing surface.

2. a kind of SMC types pressure regulation filter according to claim 1, it is characterised in that：The sealing ring is ring packing Circle or rectangular seal.

3. a kind of SMC types pressure regulation filter according to claim 1, it is characterised in that：Valve body is towards in the one side of bonnet Annular groove is offered, annular groove surrounds upper chamber, and sealing ring part is located in annular groove.

4. a kind of SMC types pressure regulation filter according to claim 1, it is characterised in that：Opened on the side surface of the piston Provided with storage tank, O-ring part is located in storage tank, and the side surface of piston passes through O-ring and valve bonnet seal.

5. a kind of SMC types pressure regulation filter according to claim 4, it is characterised in that：The O-ring is nitrile rubber O Type circle.

6. a kind of SMC types pressure regulation filter according to claim 1 or 2 or 3 or 4 or 5, it is characterised in that：Regulation component Also include handwheel, the nut coordinated with handwheel in the lifting screw being linked, with lifting screw screw thread, the other end spiral shell of spring Parent phase is supported；The handwheel can be rotated relative to bonnet.

7. a kind of SMC types pressure regulation filter according to claim 6, it is characterised in that：Lifting screw includes nut portion And threaded portion, nut portion by bonnet upper surface stretch out；Handwheel is placed on bonnet top, and handwheel is real with nut portions split-phase card Now link.

8. a kind of SMC types pressure regulation filter according to claim 1, it is characterised in that：The piston towards spring one Face offers spring locating slot, and one end of spring is stretched into spring locating slot.

9. a kind of SMC types pressure regulation filter according to claim 6, it is characterised in that：Ladder is offered in the bonnet Type cavity, the stepped cavity include smaller portions and major part, the nut be located at smaller portions in, piston be located at compared with In major part.

10. a kind of SMC types pressure regulation filter according to claim 9, it is characterised in that：The major part of stepped cavity Perisporium is provided with reinforcement, and reinforcement is located at the top of piston.