CN208295154U - A kind of mini shut-off valve - Google Patents

Abstract

The utility model discloses a kind of mini shut-off valves, include the valve body equipped with spool chamber, and the pressure cap being connected on valve body plays the screw rod of spool, and the handwheel for rotary screw rod is connect with screw rod upper end；It is equipped in valve body and covers the annular convex platform on screw rod；Boss upper cover has the rubber pad of the annular for sealing filament bar and spool chamber upper gap, and rubber pad lower part is connected with the rubber mat lower part with the cooperation of outside the boss wall；Pressure cap lower end is mutually compressed with rubber pad upper end, rubber pad inner wall and screw rod are interference fitted, screw rod is just sealed with spool chamber upper end in this way, since rubber pad wearability is better than metal, is not easy to occur between traditional screw rod and valve body in this way because the phenomenon that gap occurs in long-term friction；And rubber pad elasticity is bigger, the ratio metal of such rubber pad and screw rod cooperation and intermetallic cooperation are closer, and leakproofness is more preferable than the interference fit seal between traditional screw rod and valve body.

Description

A kind of mini shut-off valve

Technical field

The utility model belongs to valve field, and in particular to a kind of mini shut-off valve.

Background technique

Existing shut-off valve is sealed between screw rod and valve body by being simply interference fitted, but is used for a long time Later, since friction causes junction gap occur, leakproofness reduces, causes to reveal between screw rod and valve body, causes to cut Only valve reduced lifetime.

Summary of the invention

The technical problem to be solved by the utility model is in view of the deficienciess of the prior art, provide a kind of screw rod with The all relatively good shut-off valve of long term seal between valve body.

In order to achieve the purpose of the present invention, the following technical solutions are adopted:

A kind of mini shut-off valve, includes valve body, and the pressure cap being connected on valve body plays the screw rod of spool, Yi Jiyu The connection of screw rod upper end is used for the handwheel of rotary screw rod；Valve body includes valve core shell, is connected to the influent stream portion of valve core shell lower end, connection Go out stream portion in valve core shell left end, and is connected to the interconnecting piece of valve core shell upper end；

It forms spool chamber communicating up and down, accommodating screw rod in valve core shell, forms inside influent stream portion and communicate up and down Influent stream chamber forms the outflow lumen that left and right communicates out, forms the connecting hole communicated up and down inside interconnecting piece inside stream portion；Spool Chamber, influent stream chamber, outflow lumen and connecting hole communicate；

First partition is equipped between influent stream chamber and spool chamber, first partition forms first through hole；Outflow lumen and spool chamber Between be equipped with second partition, second partition forms the second through-hole；

Screw lower end is connected with the plug for blocking first through hole, and plug diameter gradually becomes smaller from top to bottom；

Spool chamber upper portion side wall is equipped with the first internal screw thread, and screw rod lower part is equipped with and the outer spiral shell of the first internal screw thread matched first Line；

Annular convex platform is equipped between connecting hole and spool chamber, the outer diameter of boss becomes larger from top to bottom；It is stamped on boss For sealing the rubber pad of the annular of screw rod and spool chamber upper gap, rubber pad inner wall and screw rod are interference fitted；Under rubber pad Portion is connected with the rubber mat lower part with the cooperation of outside the boss wall；

Pressure cap lower end is mutually compressed with rubber pad upper end, and pressure cap is equipped with the screw rod through-hole that communicates up and down, under pressure cap lateral wall Portion is equipped with the second external screw thread, and connecting hole side wall is equipped with and internal screw thread in the second external screw thread matched second.

Ground is advanced optimized, inner groove is formed in the middle part of the screw rod through-hole side wall of pressure cap, is connected in inner groove for close The rubber ring of envelope, rubber ring and screw rod are interference fitted.

Ground is advanced optimized, first through hole top is formed with plug outer wall to matched bellmouth in first partition, is bored The diameter in shape hole is gradually reduced from top to bottom；It is equipped with link slot in the middle part of plug, the sealing ring of annular is connected in link slot.

Advanced optimize ground, sealing ring with a thickness of 1-3mm, extending to width outside link slot is 2-6mm.

Ground is advanced optimized, screw rod upper end is symmetrically arranged with two limit outer walls；Handwheel is equipped with the cooperation covered in screw rod upper end Hole is symmetrically arranged with the limit inner walls of two with limit outer wall cooperation on matching hole；Screw rod top is equipped with opening up threaded hole, Screw rod further passes through screw with handwheel and connects.

Ground is advanced optimized, handwheel top forms opening up mounting groove, label, label quilt are connected in mounting groove Screw is fixed in mounting groove.

Ground is advanced optimized, handwheel lateral wall is circumferentially uniformly provided with several lug bosses.

Ground is advanced optimized, handwheel lower part is equipped with the groove for accommodating pressure cap top.

Ground is advanced optimized, outer groove is equipped in the middle part of pressure cap lateral wall, is connected in the middle part of lateral wall for facilitating rotation The polygonal portion of pressure cap.

Compared with prior art, the synthesis beneficial effect of the utility model is:

1, boss outer diameter is gradually reduced from upper to small, and rubber pad is covered on boss, and rubber pad is compressed tightly against by pressure cap again On boss, the good leak tightness between boss and rubber pad can be made in this way.Rubber pad inner wall and screw rod are interference fitted, such silk Bar is just sealed with spool chamber upper end, since rubber pad wearability is better than metal, is not easy traditional screw rod and valve occur in this way Because the phenomenon that gap occurs in long-term friction between body；And rubber pad elasticity is bigger, the ratio metal of such rubber pad and screw rod cooperation Closer with intermetallic cooperation, leakproofness is more preferable than the interference fit seal between traditional screw rod and valve body.To solve Certainly, the problem of screw rod and valve body are interference fitted, cause poor sealing after long-time service in background technique, improves shut-off valve Service life.

2, rubber ring is connected in the inner groove of screw rod through-hole, rubber ring and screw rod are interference fitted, in this way in rubber pad pair Under the premise of screw rod is sealed, screw rod is sealed again, further ensures that when opening stop valve, prevents from screw rod Leakage.

3, corresponding Rubber end can be cased on traditional screw rod plug, but such Rubber end individual is big, wastes material, And be easy to split, to reduce leakproofness, herein in order to further ensure that the airtightness of shut-off valve, the utility model first are logical Hole top is formed with plug outer wall to matched bellmouth, and the diameter of bellmouth is gradually reduced from top to bottom；It is set in the middle part of plug There is link slot, the sealing ring of annular is connected in link slot.Different relative to existing Rubber end, annular sealing ring can The gap between plug and bellmouth is filled with efficient deformation, screw rod is twisted more downward, and sealing ring and plug and bellmouth cooperate It is closer, to guarantee effective sealing.

Detailed description of the invention

Fig. 1 is the schematic perspective view of the utility model.

Fig. 2 is the cross-sectional view of the utility model.

Fig. 3 is the structural schematic diagram of the utility model valve body.

Fig. 4 is the cross-sectional view of the utility model valve body.

Fig. 5 is the structural schematic diagram of the utility model screw rod.

Fig. 6 is the structural schematic diagram of the utility model rubber pad.

Fig. 7 is the cross-sectional view of the utility model rubber pad.

Fig. 8 is the structural schematic diagram of the utility model pressure cap.

Fig. 9 is the cross-sectional view of the utility model pressure cap.

Figure 10 is the structural schematic diagram at one visual angle of the utility model handwheel.

Figure 11 is the structural schematic diagram at another visual angle of the utility model handwheel.

Appended drawing reference: 1, valve body；11, valve core shell；111, spool chamber；112, second partition；1121, the second through-hole；12, into Stream portion；121, influent stream chamber；122, first partition；1221, first through hole；1222, bellmouth；13, go out stream portion；131, outflow lumen； 14, interconnecting piece；141, connecting hole；142, boss；2, screw rod；21, the first external screw thread；22, outer wall is limited；23, threaded hole；24, Plug；25, sealing ring；3, rubber pad；31, rubber mat lower part；4, pressure cap；41, screw rod through-hole；42, the second external screw thread；43, polygon Shape portion；44, outer groove；45, inner groove；451, rubber ring；5, handwheel；51, matching hole；511, inner wall is limited；52, lug boss； 53, mounting groove；54, groove；6, label；7, screw.

Specific embodiment

Specific embodiment of the present utility model is made a detailed explanation to attached drawing 11 below according to attached drawing 1.

The present embodiment is a kind of mini shut-off valve, includes valve body 1, the pressure cap 4 being connected on valve body 1 plays spool Screw rod 2, and connect with 2 upper end of screw rod the handwheel 5 for rotary screw rod 2.Valve body 1 includes valve core shell 11, is connected to valve The influent stream portion 12 of 11 lower end of core shell, be connected to 11 left end of valve core shell goes out stream portion 13, and is connected to the company of 11 upper end of valve core shell Socket part 14.Spool chamber 111 communicating up and down, accommodating screw rod 2 is formed in valve core shell 11, is formed up and down inside influent stream portion 12 The influent stream chamber 121 communicated forms the outflow lumen 131 that left and right communicates out, forms inside interconnecting piece 14 up and down inside stream portion 13 The connecting hole 141 communicated；Spool chamber 111, influent stream chamber 121, outflow lumen 131 and connecting hole 141 4 communicate.121 He of influent stream chamber First partition 122 is equipped between spool chamber 111, first partition 122 forms first through hole 1221；Outflow lumen 131 and spool chamber Second partition 112 is equipped between 111, second partition 112 forms the second through-hole 1121.2 lower end of screw rod is connected with for blocking The plug 24 of first through hole 1221,24 diameter of plug gradually become smaller from top to bottom.111 upper portion side wall of spool chamber is equipped with spiral shell in first Line, 2 lower part of screw rod are equipped with and matched first external screw thread 21 of the first internal screw thread.Ring is equipped between connecting hole 141 and spool chamber 111 The outer diameter of shape boss 142, boss 142 becomes larger from top to bottom；142 upper cover of boss has for sealing filament bar 2 and spool chamber 111 The rubber pad 3 of the annular of upper gap, 3 inner wall of rubber pad and screw rod 2 are interference fitted；3 lower part of rubber pad is connected with and boss 142 Positioning action is played on boss 142 in the rubber mat lower part 31 of lateral wall cooperation, 31 sets of rubber mat lower part, and rubber pad 3 is not just in this way It can slide, it is not easily to fall off.4 lower end of pressure cap is mutually compressed with 3 upper end of rubber pad, and pressure cap 4 is equipped with the screw rod through-hole 41 communicated up and down, 4 lateral wall lower part of pressure cap be equipped with the second external screw thread 42,141 side wall of connecting hole be equipped with in the second external screw thread 42 matched second in Screw thread, pressure cap 4 are connect by screw thread with interconnecting piece 14, and what is be screwed down is more, squeeze bigger, the sealing of rubber pad 3 to rubber pad 3 Effect is better.Pressure cap 4 is fixed with interconnecting piece simultaneously, will not ensure that pressure cap one with rotating when screw rod dextrorotation or derotation Rubber pad directly is pressed tightly against, is not in gap.

By above-mentioned setting, 142 outer diameter of boss is gradually reduced from upper to small, and rubber pad 3, rubber pad 3 are covered on boss 142 It is compressed tightly against on boss 142 by pressure cap 4 again, the good leak tightness between boss 142 and rubber pad 3 can be made in this way.Rubber It pads 3 inner walls and screw rod 2 is interference fitted, such screw rod 2 is just sealed with 111 upper end of spool chamber, due to 3 wearability ratio of rubber pad Metal is good, is not easy to occur between traditional screw rod 2 and valve body 1 in this way because the phenomenon that gap occurs in long-term friction；And 3 bullet of rubber pad Property it is bigger, ratio metal that such rubber pad 3 and screw rod 2 cooperate and it is intermetallic cooperate closer, leakproofness is than traditional screw rod 2 Interference fit seal between valve body 1 is more preferable.To solve, screw rod 2 and valve body 1 are interference fitted in background technique, long Phase causes the problem of poor sealing after, improves the service life of shut-off valve.

Ground is advanced optimized, inner groove 45 is formed in the middle part of 41 side wall of screw rod through-hole of pressure cap 4, is connected in inner groove 45 For the rubber ring 451 of sealing, rubber ring 451 and screw rod 2 are interference fitted.

By above-mentioned setting, in this way under the premise of rubber pad 3 is sealed screw rod 2, screw rod 2 is carried out again close Envelope, further ensures that when opening stop valve, prevents to leak from screw rod 2.

Ground is advanced optimized, 1221 top of first through hole is formed with 24 outer wall of plug to matched in first partition 122 The diameter of bellmouth 1222, bellmouth 1222 is gradually reduced from top to bottom；Link slot, connection in link slot are equipped in the middle part of plug 24 There is the sealing ring 25 of annular.Sealing ring 25 with a thickness of 1-3mm, extending to width outside link slot is 2-6mm.

By above-mentioned setting, corresponding Rubber end can be cased on traditional 2 plug 24 of screw rod, but such Rubber end is a Body is big, wastes material, and is easy to split, to reduce leakproofness, herein in order to further ensure that the airtightness of shut-off valve, this 1221 top of utility model first through hole is formed with 24 outer wall of plug to matched bellmouth 1222, the diameter of bellmouth 1222 It is gradually reduced from top to bottom；It is equipped with link slot in the middle part of plug 24, the sealing ring 25 of annular is connected in link slot.Relative to existing Rubber end it is different, annular sealing ring 25 can fill the gap between plug 24 and bellmouth 1222 with efficient deformation, Screw rod 2 is twisted more downward, sealing ring 25 and plug 24 and bellmouth 1222 cooperate it is closer, to guarantee effectively to seal.

Ground is advanced optimized, 2 upper end of screw rod is symmetrically arranged with two limit outer walls 22；Handwheel 5, which is equipped with, to be covered in 2 upper end of screw rod Matching hole 51 is symmetrically arranged with two limit inner walls 511 cooperated with limit outer wall 22, such handwheel 5 on matching hole 51 Rotary screw rod 2, screw rod 2 will not be relatively rotated with handwheel 5；2 top of screw rod is equipped with opening up threaded hole 23, screw rod 2 and hand Wheel 5 is further connected by screw 7, and screw 7 is tightly coupled handwheel 5 and screw rod 2 together, and handwheel 5 is not easy from screw rod 2 On fall off.

Ground is advanced optimized, 5 top of handwheel forms opening up mounting groove 53, is connected with label 6 in mounting groove 53, Label 6 is fixed in mounting groove 53 by screw 7, facilitates the installation of famous brand, is not needed famous brand and is pasted on handwheel 5.

Ground is advanced optimized, 5 lateral wall of handwheel is circumferentially uniformly provided with several lug bosses 52, and hand pinches protrusion, rotates hand Wheel 5 is not easy to skid, and motive force of growth arm is laborsaving.

Ground is advanced optimized, 5 lower part of handwheel is equipped with the groove 54 for accommodating 4 top of pressure cap, so that handwheel 5 is turned more lower It goes, does not need the very long of the setting of screw rod 2.

Advanced optimize ground, be equipped with outer groove 44 in the middle part of pressure cap 4 lateral wall, can save in this way pressure cap 4 with material amount, outside The polygonal portion 43 for facilitating rotation pressure cap 4 is connected in the middle part of side wall.

The above is only the preferred embodiments of the utility model, are not intended to limit the utility model, those skilled in the art Member carries out common variations and alternatives within the scope of technical solutions of the utility model should be included in the protection model of the utility model In enclosing.

Claims (9)

1. a kind of mini shut-off valve, it is characterised in that: include valve body, the pressure cap being connected on valve body plays the silk of spool Bar, and the handwheel of rotary screw rod is connect and is used for screw rod upper end；Valve body includes valve core shell, is connected to valve core shell lower end Influent stream portion, be connected to valve core shell left end goes out stream portion, and is connected to the interconnecting piece of valve core shell upper end；

Spool chamber communicating up and down, accommodating screw rod is formed in valve core shell, forms the influent stream communicated up and down inside influent stream portion Chamber forms the outflow lumen that left and right communicates out, forms the connecting hole communicated up and down inside interconnecting piece inside stream portion；Spool chamber, Influent stream chamber, outflow lumen and connecting hole communicate；

First partition is equipped between influent stream chamber and spool chamber, first partition forms first through hole；Between outflow lumen and spool chamber Equipped with second partition, second partition forms the second through-hole；

Screw lower end is connected with the plug for blocking first through hole, and plug diameter gradually becomes smaller from top to bottom；

Spool chamber upper portion side wall is equipped with the first internal screw thread, and screw rod lower part is equipped with and matched first external screw thread of the first internal screw thread；

Annular convex platform is equipped between connecting hole and spool chamber, the outer diameter of boss becomes larger from top to bottom；Boss upper cover is used for Screw rod and spool chamber upper gap, annular rubber pad are sealed, rubber pad inner wall and screw rod are interference fitted；Rubber pad lower part connects It is connected to the rubber mat lower part with the cooperation of outside the boss wall；

Pressure cap lower end is mutually compressed with rubber pad upper end, and pressure cap is equipped with the screw rod through-hole communicated up and down, and pressure cap lateral wall lower part is set There is the second external screw thread, connecting hole side wall is equipped with and internal screw thread in the second external screw thread matched second.

2. a kind of mini shut-off valve according to claim 1, it is characterised in that: in being formed in the middle part of the screw rod through-hole side wall of pressure cap Annular groove, the rubber ring for sealing is connected in inner groove, and rubber ring and screw rod are interference fitted.

3. a kind of mini shut-off valve according to claim 1 or 2, it is characterised in that: first through hole top forms in first partition Have with plug outer wall to matched bellmouth, the diameter of bellmouth is gradually reduced from top to bottom；Link slot is equipped in the middle part of plug, even The sealing ring of annular is connected in access slot.

4. a kind of mini shut-off valve according to claim 3, it is characterised in that: sealing ring with a thickness of 1-3mm, extend to connection Width outside slot is 2-6mm.

5. a kind of mini shut-off valve according to claim 1, it is characterised in that: screw rod upper end is symmetrically arranged with two limit outer walls； Handwheel is equipped with the matching hole covered in screw rod upper end, and the limit inner wall of two with limit outer wall cooperation are symmetrically arranged on matching hole；Silk Bar top is equipped with opening up threaded hole, and screw rod further passes through screw with handwheel and connects.

6. a kind of mini shut-off valve stated according to claim 5, it is characterised in that: handwheel top forms opening up installation Slot is connected with label in mounting groove, and label is fixed in mounting groove by screw.

7. a kind of mini shut-off valve according to claim 1, it is characterised in that: handwheel lateral wall is circumferentially uniformly provided with several convex The portion of rising.

8. a kind of mini shut-off valve according to claim 1, it is characterised in that: handwheel lower part, which is equipped with, accommodates the recessed of pressure cap top Slot.

9. a kind of mini shut-off valve according to claim 1, it is characterised in that: be equipped with outer groove, outside in the middle part of pressure cap lateral wall The polygonal portion for facilitating rotation pressure cap is connected in the middle part of wall.