CN208024904U - A kind of gas pipeline self-closing valve - Google Patents

Abstract

A kind of gas pipeline self-closing valve disclosed by the utility model, including valve body, both ends are respectively arranged with air inlet pipe and an air outlet pipe, the valve deck of center opening is fixedly connected with above valve body, the center of valve deck, which passes through, valve deck pull rod, the top of valve deck pull rod is provided with shift mechanism, the bottom end of valve deck pull rod is the actuation portion of irony and is fixedly connected with epithelium, epithelium forms closed accommodating cavity with valve body, secure fit has position-limited rack in accommodating cavity, the irony pressing plate for being fixedly arranged above center opening of position-limited rack, magnet is placed with above pressing plate, the transmission mechanism being fixedly connected with magnet is provided with below pressing plate, drawing cap is connected on transmission mechanism.The utility model since the travel limit effect of limit bezel ring, avoids Overexertion when lifting that valve deck pull rod bottom and magnet is caused to disengage, so as to cause self-closing valve accidental switch off phenomenon；When pipeline air pressure is in ultralimit state, rod cap prolapse upwards limited cover under the action of valve deck pull rod can play the role of instruction.

Description

A kind of gas pipeline self-closing valve

Technical field

The utility model belongs to valve technology field, and in particular to a kind of gas pipeline self-closing valve.

Background technology

Gas pipeline self-closing valve, abbreviation self-closing valve are installed on low-pressure fuel gas system pipeline, when gas supply conduit pressure occurs When under-voltage, superpressure, not electricity consumption or other external impetus, can be automatically closed and must be manually opened device.The valve of traditional self-closing valve Bar, if controlling bad dynamics, is easy to disengage valve rod and the magnet of its bottom, then valve rod will decline after being lifted up And self-closing valve is made to close, influence the practicality；In addition, when pipeline air pressure is in ultralimit state, epithelium etc. zero may be damaged Part and gas leak phenomenon occurs, user is also difficult to find, to cause safety accident.

Utility model content

The purpose of this utility model is to provide a kind of gas pipeline self-closing valves, have higher practicability and safety.

Technical solution used by the utility model is：A kind of gas pipeline self-closing valve, including valve body, the both ends point of valve body It is not provided with air inlet pipe and an air outlet pipe, the valve deck of center opening is fixedly connected with above valve body, the center of valve deck, which passes through, valve The top of lid pull rod, valve deck pull rod is provided with shift mechanism, and the bottom end of valve deck pull rod is the actuation portion of irony and is fixedly connected with Epithelium, epithelium and valve body form closed accommodating cavity, and secure fit has a position-limited rack in accommodating cavity, in being fixedly arranged above of position-limited rack The irony pressing plate of heart trepanning, magnet is placed with above pressing plate, and the bottom end of valve deck pull rod is butted on above magnet, is set below pressing plate It is equipped with the transmission mechanism being fixedly connected with magnet, the drawing cap for being covered on valve body close to air inlet pipe side is connected on transmission mechanism；

Shift mechanism includes the cylindrical shape limited cover placed above valve deck, and the top of limited cover is openning shape, limited cover Bottom centre is provided with trepanning, and the bottom of limited cover is also coaxially fixed with size and is limited with the comparable cylindrical shape of valve deck top drilling Bezel ring, limit bezel ring, is inserted into valve deck and bottom extends radially outward, and the top of valve deck pull rod passes through the bottom of limited cover It center and is fixed in limited cover；

Fasten the rod cap for having that size is adaptable therewith in limited cover, the bottom end of rod cap be provided with in limited cover bottom The top of the corresponding trepanning of the heart, valve deck pull rod is stretched into after the bottom centre of limited cover and is fixed in rod cap；

Rod cap includes rod cap ontology, and the side wall of rod cap ontology is horizontally disposed opening, rod cap ontology Opening in be equipped with hollow withdrawing part, the bottom of rod cap ontology and withdrawing part offers the through-hole being mutually communicated, The top of valve deck pull rod sequentially passes through rod cap ontology and the bottom through-hole of withdrawing part is inserted into withdrawing part, the top of valve deck pull rod It holds and circumferentially offers annular card slot, circumferentially uniform intervals are fixed with several be caught in card slot on the bottom through-hole of withdrawing part Card.

The utility model is also characterized by

The bottom of limit bezel ring, offers the groove of annular, and circumferentially uniform intervals are fixed with several for the bottom of limited cover It is caught in the hidden discount of groove.

Circumferentially uniform intervals are provided with several and the one-to-one reinforcing rib of hidden discount for the bottom of limited cover.

Transmission mechanism includes the vertical slideway and horizontal slide being arranged in position-limited rack, and one end of horizontal slide is connected to vertically The stage casing of slideway, the other end face air inlet pipe of horizontal slide are equipped with the outwardly directed level in one end in horizontal slide Pull rod draws cap to be fixed on one end that girt is located at outside horizontal slide；The center opening of the top face pressing plate of vertical slideway, The vertical pull rod of pressing plate center opening can be stretched out by being equipped with top in vertical slideway, and the top of vertical pull rod passes through screw It is fixed with magnet；Vertical pull rod is connected with girt one end close to each other by right angle link transmission.

Right angle connecting rod is L-shaped and two edge lengths are suitable, and the top of right angle connecting rod is connect by axis pin with position-limited rack, right angle Two edges of connecting rod longitudinally offer sliding slot；It is both provided with cunning on vertical pull rod and girt one end close to each other Block, two sliding blocks, which are respectively cooperating with, to be set in two sliding slots.

The top outer diameter of vertical pull rod is not more than the internal diameter of pressing plate center opening；The lower outer diameter of vertical pull rod is not less than pressure The internal diameter of plate center opening.

Position-limited rack, girt, vertical pull rod and right angle connecting rod material be polyformaldehyde thermoplastic crystalline polymer.

The position that the bottom of valve deck pull rod is located above epithelium is fixed with epithelium gasket.

The utility model has the beneficial effects that：A kind of gas pipeline self-closing valve of the utility model, by valve deck pull rod top Shift mechanism is arranged in portion, when being lifted valve deck pull rod by limited cover, since the travel limit effect of limit bezel ring, avoids carrying Overexertion causes valve deck pull rod bottom and magnet to disengage when drawing, so as to cause self-closing valve accidental switch off phenomenon；When pipeline gas When being pressed in ultralimit state, rod cap prolapse upwards limited cover under the action of valve deck pull rod can play the role of instruction, have Effect reduces security risk.

Description of the drawings

Fig. 1 is a kind of structural schematic diagram of gas pipeline self-closing valve of the utility model；

Fig. 2 is a kind of sectional view of gas pipeline self-closing valve of the utility model；

Fig. 3 is the structural schematic diagram of shift mechanism in a kind of gas pipeline self-closing valve of the utility model；

Fig. 4 is the sectional view of shift mechanism in a kind of gas pipeline self-closing valve of the utility model；

Fig. 5 is a kind of directions the A-A view of gas pipeline self-closing valve of the utility model in Fig. 4；

Fig. 6 is the structural schematic diagram of withdrawing part in a kind of gas pipeline self-closing valve of the utility model；

Fig. 7 is the structural schematic diagram of withdrawing part bottom in a kind of gas pipeline self-closing valve of the utility model；

Fig. 8 is the structural schematic diagram of transmission mechanism in a kind of gas pipeline self-closing valve of the utility model；

Fig. 9 is the sectional view of transmission mechanism in a kind of gas pipeline self-closing valve of the utility model；

Figure 10 is the structural schematic diagram of vertical pull rod in a kind of gas pipeline self-closing valve of the utility model；

Figure 11 is the schematic diagram that a kind of gas pipeline self-closing valve of the utility model is in valve opening state；

Figure 12 is the schematic diagram that a kind of gas pipeline self-closing valve of the utility model is under superpressure state.

In figure, 1. valve bodies, 2. air inlet pipe, 3. escape pipes, 4. valve decks, 5. valve deck pull rods, 6. epitheliums, 7. position-limited racks, 8. pressures Plate, 9. magnet, 10. drawing caps, 11. limited covers, 12. limit bezel ring,s, 13. rod caps, 14. grooves, 15. hidden discounts, 16. reinforcing ribs, 17. vertical slideway, 18. horizontal slides, 19. girts, 20. vertical pull rods, 21. right angle connecting rods, 22. sliding slots, 23. sliding blocks, 24. epithelium gasket, 25. rod cap ontologies, 26. withdrawing parts, 27. card slots, 28. cards.

Specific implementation mode

Below in conjunction with the accompanying drawings and the utility model is described in detail in specific implementation mode.

The utility model provides a kind of gas pipeline self-closing valve, as illustrated in fig. 1 and 2, including valve body 1, the both ends of valve body 1 It is respectively arranged with air inlet pipe 2 and escape pipe 3, the top of valve body 1 is fixedly connected with the valve deck 4 of center opening, and the center of valve deck 4 is worn Valve deck pull rod 5 is crossed, the top of valve deck pull rod 5 is provided with shift mechanism, and the bottom end of valve deck pull rod 5 is the actuation portion of irony and consolidates Surely it is connected with epithelium 6, the bottom of valve deck pull rod 5 is located at the position above epithelium 6 and is fixed with epithelium gasket 24, epithelium 6 and valve body 1 Closed accommodating cavity is formed, secure fit has position-limited rack 7, the irony for being fixedly arranged above center opening of position-limited rack 7 in accommodating cavity Pressing plate 8, the top of pressing plate 8 are placed with magnet 9, and the bottom end of valve deck pull rod 5 is butted on 9 top of magnet, the lower section of pressing plate 8 be provided with The transmission mechanism that magnet 9 is fixedly connected is connected with the drawing cap 10 for being covered on valve body 1 close to 2 side of air inlet pipe on transmission mechanism, draws The material of cap 10 is nitrile rubber.

When work, as shown in Figure 2 (lower to be left, the right side is upper), lift the limited cover 11 of shift mechanism, valve deck pull rod 5 manually It is moved upwards under the action of 11 draw-in bar cap 13 of limited cover, while the magnetic attraction force between valve deck pull rod 5 and magnet 9 overcomes magnetic Magnetic attraction force between iron 9 and pressing plate 8 makes magnet 9 rise, and the vertical pull rod 20 for the transmission mechanism being fixedly connected with magnet 9 is therewith Rise, the right angle connecting rod 21 being flexibly connected with vertical pull rod 20 is made to rotate counterclockwise, it is horizontal to the left to oppress girt 19 Sliding, and then so that drawing cap 10 is moved downward and disengage 1 sealing surface of valve body, at this point, self-closing valve is in aeration status.When pipe gas pressure When power is within the scope of ± the 2KPa of 0.8 ± 0.2KPa~8, as shown in figure 11, hand unclamps limited cover 11, and buoyant gas can also overcome magnetic Magnetic attraction force between iron 9 and pressing plate 8 makes 20 step surface of vertical pull rod be adjacent to pressing plate 8 with 6 elastic force of epithelium, and self-closing valve is made to protect automatically Hold aeration status；As pipe gas pressure≤0.8 ± 0.2KPa, 6 bullet of magnetic attraction force and epithelium between magnet 9 and pressing plate 8 Power overcomes buoyant gas, makes the decline of magnet 9 and 8 automatic pick of pressing plate, and then so that drawing cap 10 is moved right pressure by transmission mechanism Tight 1 sealing surface of valve body is automatically closed with cutting off air source so as to cause self-closing valve.As pipe gas pressure >=8 ± 2KPa, gas Magnetic attraction force and epithelium elastic force between buoyancy overcoming valve deck pull rod 5 and magnet 9 make valve deck pull rod 5 continue rising de- with magnet 9 It opens, magnet 9 declines and 8 automatic pick of pressing plate, so that drawing cap 10 is moved right by transmission mechanism and compresses 1 sealing surface of valve body to cut off Air source is automatically closed so as to cause self-closing valve.

As shown in Fig. 3 to Fig. 7, shift mechanism includes the cylindrical shape limited cover 11 that 4 top of valve deck is placed, the top of limited cover 11 Portion is openning shape, and the bottom centre of limited cover 11 is provided with trepanning, and the bottom of limited cover 11 is also coaxially fixed with size and valve deck 4 The comparable cylindrical shape of top drilling limits bezel ring, 12, and the bottom of limit bezel ring, 12 offers the groove 14 of annular, limited cover 11 Circumferentially uniform intervals are fixed with several hidden discounts 15 for being caught in groove 14 for bottom, the bottom of limited cover 11 circumferentially uniform intervals Be provided with several and 15 one-to-one reinforcing rib 16 of hidden discount, limit bezel ring, 12 be inserted into valve deck 4 and bottom radially to The top of outer extension, valve deck pull rod 5 passes through the bottom centre of limited cover 11 and is fixed in limited cover 11.Wherein, in limited cover 11 are additionally arranged at the bottom limit bezel ring, 12, since Overexertion leads to valve deck when the travel limit effect of limit bezel ring, 12 can avoid lifting 5 bottom of pull rod and magnet 9 disengage, so as to cause self-closing valve accidental switch off phenomenon；In addition, limited cover 11 with limit bezel ring, 12 it Between using ring type hidden discount 15 connect, meanwhile, 15 both ends root of hidden discount carry reinforcing rib 15, its role is to：One, expand hidden discount 15 Flexible deformation face avoids root stress concentration and the fatigue damage of generation；Two, the strength and stiffness for improving hidden discount 15, prevent Limited cover 11 is disengaged with limit bezel ring, 12 caused by violence is constructed.The drawing for having that size is adaptable therewith is fastened in limited cover 11 The bottom end of pole cap 13, rod cap 13 is provided with trepanning corresponding with 11 bottom centre of limited cover, and the top of valve deck pull rod 5 passes through limit It stretches into and is fixed in rod cap 13 after the bottom centre of position lid 11；Rod cap 13 includes rod cap ontology 25, rod cap ontology 25 side wall is horizontally disposed opening, and hollow withdrawing part 26 is equipped in the opening of rod cap ontology 25, draws The bottom of pole cap ontology 25 and withdrawing part 26 offers the through-hole being mutually communicated, and the top of valve deck pull rod 5 sequentially passes through rod cap Ontology 25 and the bottom through-hole of withdrawing part 26 are inserted into withdrawing part 26, and the top of valve deck pull rod 5 circumferentially offers annular Card slot 27, circumferentially uniform intervals are fixed with several cards 28 being caught in card slot 27 on the bottom through-hole of withdrawing part 26.Wherein, As shown in figure 12, the button connection relation of rod cap 13 and limited cover 11 may make that epithelium 6 is by larger when pipeline air pressure is excessive Buoyancy so that valve deck pull rod 5 be put on, limited cover 11 also obtains peak, Jin Erfa due to the effect of limit bezel ring, 12 at this time The fixed rod cap 13 in 5 top of lid pull rod deviates from limited cover 11 with 11 relative motion of limited cover, plays indicative function；And rod cap The drawer type used between ontology 25 and withdrawing part 26 connects so that assembly is simple and convenient and safe and reliable.

As shown in Fig. 8 to Figure 10, transmission mechanism includes the vertical slideway 17 being arranged in position-limited rack 7 and horizontal slide 18, water The one end in smooth road 18 is connected to the stage casing of vertical slideway 17, the other end face air inlet pipe 2 of horizontal slide 18, horizontal slide 18 It is inside equipped with the outwardly directed girt 19 in one end, draws cap 10 to be fixed on girt 19 and is located at outside horizontal slide 18 One end；The center opening of the top face pressing plate 8 of vertical slideway 17, pressure can be stretched out by being equipped with top in vertical slideway 17 The vertical pull rod 20 of 8 center opening of plate, the top outer diameter of vertical pull rod 20 are not more than the internal diameter of 8 center opening of pressing plate；It is vertical to draw The lower outer diameter of bar 20 is not less than the internal diameter of 8 center opening of pressing plate, and the top of vertical pull rod 20 is fixed by screw and magnet 9； Vertical pull rod 20 and the one end close to each other of girt 19 are sequentially connected by right angle connecting rod 21, right angle connecting rod 21 it is L-shaped and Two edge lengths are suitable and ensure that its length can rotate to rigging position and just position, in this way it is avoided that the long short side work of worker's sorting Make, while can quickly position again, improve working efficiency, the top of right angle connecting rod 21 is connect by axis pin with position-limited rack 7, and right angle connects Two edges of bar 21 longitudinally offer sliding slot 22；It is respectively provided on vertical pull rod 20 and the one end close to each other of girt 19 There is sliding block 23, two sliding blocks 23, which are respectively cooperating with, to be set in two sliding slots 22.

Position-limited rack 7, girt 19, vertical pull rod 20 and right angle connecting rod 21 material be that polyformaldehyde thermoplastic crystalline is poly- Close object, this kind of material has that high intensity, high rigidity, high-fatigue strength, good, the anti-attrition wearability of elasticity be good and good stability of the dimension Feature, it is ensured that the sensitivity and security reliability of self-closing valve；Meanwhile high elasticity compensates for due to each part foozle again The big defect of the self-closing valve parameter discrete properties degree of generation, improves product qualification rate.

By the above-mentioned means, a kind of gas pipeline self-closing valve of the utility model in the 5 top setting of valve deck pull rod by lifting Mechanism, when being lifted valve deck pull rod 5 by limited cover 11, due to mistake when the travel limit effect of limit bezel ring, 12 avoids lifting Degree firmly causes 5 bottom of valve deck pull rod and magnet 9 to disengage, so as to cause self-closing valve accidental switch off phenomenon；When pipeline air pressure exists When ultralimit state, the prolapse upwards limited cover 11 under the action of valve deck pull rod 5 of rod cap 13 can play the role of instruction, Effectively reduce security risk.

Claims (8)

1. a kind of gas pipeline self-closing valve, which is characterized in that including valve body (1), the both ends of valve body (1) are respectively arranged with air inlet pipe (2) and escape pipe (3) valve deck (4) of center opening, is fixedly connected with above valve body (1), the center of valve deck (4), which passes through, valve The top of lid pull rod (5), valve deck pull rod (5) is provided with shift mechanism, and the bottom end of valve deck pull rod (5) is the actuation portion of irony and consolidates Surely it is connected with epithelium (6), epithelium (6) forms closed accommodating cavity with valve body (1), and secure fit has position-limited rack (7) in accommodating cavity, The irony pressing plate (8) for being fixedly arranged above center opening of position-limited rack (7), magnet (9) is placed with above pressing plate (8), and valve deck is drawn The bottom end of bar (5) is butted on above magnet (9), and the transmission mechanism being fixedly connected with magnet (9) is provided with below pressing plate (8), is passed The drawing cap (10) for being covered on valve body (1) close to air inlet pipe (2) side is connected on motivation structure；

Shift mechanism includes the cylindrical shape limited cover (11) placed above valve deck (4), and the top of limited cover (11) is openning shape, limit The bottom centre of position lid (11) is provided with trepanning, and the bottom of limited cover (11), which is also coaxially fixed at the top of size and valve deck (4), opens The comparable cylindrical shape limit bezel ring, (12) in hole, limit bezel ring, (12) is inserted into valve deck (4) and bottom extends radially outward, valve The top of lid pull rod (5) passes through the bottom centre of limited cover (11) and is fixed in limited cover (11)；

The rod cap (13) for having that size is adaptable therewith is fastened in limited cover (11), the bottom end of rod cap (13) is provided with and limits The corresponding trepanning of (11) bottom centre is covered, the top of valve deck pull rod (5) is stretched into and consolidated after the bottom centre of limited cover (11) Due in rod cap (13)；

Rod cap (13) includes rod cap ontology (25), and the side wall of rod cap ontology (25) is horizontally disposed opening, draws Hollow withdrawing part (26), the bottom of rod cap ontology (25) and withdrawing part (26) are equipped in the opening of pole cap ontology (25) Portion offers the through-hole being mutually communicated, and the top of valve deck pull rod (5) sequentially passes through rod cap ontology (25) and withdrawing part (26) Bottom through-hole is inserted into withdrawing part (26), and the top of valve deck pull rod (5) circumferentially offers the card slot (27) of annular, withdrawing part (26) circumferentially uniform intervals are fixed with several cards (28) being caught in card slot (27) on bottom through-hole.

2. a kind of gas pipeline self-closing valve as described in claim 1, which is characterized in that open the bottom of the limit bezel ring, (12) Groove (14) equipped with annular, circumferentially uniform intervals are fixed with several and are caught in the dark of groove (14) for the bottom of limited cover (11) It detains (15).

3. a kind of gas pipeline self-closing valve as claimed in claim 2, which is characterized in that the bottom of the limited cover (11) is along week Uniform intervals are provided with several and the one-to-one reinforcing rib (16) of hidden discount (15).

4. a kind of gas pipeline self-closing valve as described in claim 1, which is characterized in that the transmission mechanism includes position-limited rack (7) the vertical slideway (17) and horizontal slide (18), one end of horizontal slide (18) being arranged in are connected to vertical slideway (17) It is outwardly directed to be equipped with one end in horizontal slide (18) for stage casing, the other end face air inlet pipe (2) of horizontal slide (18) Girt (19) draws cap (10) to be fixed on girt (19) and is located at the one end of horizontal slide (18) outside；Vertical slideway (17) Top face pressing plate (8) center opening, be equipped with top in vertical slideway (17) pressing plate (8) center can be stretched out and open The top of the vertical pull rod (20) in hole, vertical pull rod (20) is fixed by screw and magnet (9)；Vertical pull rod (20) and horizontal drawing Bar (19) one end close to each other is sequentially connected by right angle connecting rod (21).

5. a kind of gas pipeline self-closing valve as claimed in claim 4, which is characterized in that the right angle connecting rod (21) it is L-shaped and Two edge lengths are suitable, and the top of right angle connecting rod (21) is connect by axis pin with position-limited rack (7), two sides of right angle connecting rod (21) Sliding slot (22) is offered along longitudinal direction；It is both provided with sliding block on vertical pull rod (20) and girt (19) one end close to each other (23), two sliding blocks (23), which are respectively cooperating with, is set in two sliding slots (22).

6. a kind of gas pipeline self-closing valve as claimed in claim 4, which is characterized in that outside the top of the vertical pull rod (20) Diameter is not more than the internal diameter of pressing plate (8) center opening；The lower outer diameter of vertical pull rod (20) is interior not less than pressing plate (8) center opening Diameter.

7. such as a kind of gas pipeline self-closing valve of claim 4-6 any one of them, which is characterized in that the position-limited rack (7), water The material of horizontal drawing bar (19), vertical pull rod (20) and right angle connecting rod (21) is polyformaldehyde thermoplastic crystalline polymer.

8. a kind of gas pipeline self-closing valve as described in claim 1, which is characterized in that the bottom position of the valve deck pull rod (5) Position above epithelium (6) is fixed with epithelium gasket (24).