CN205639761U - Controlling means of selection valve - Google Patents

Abstract

The utility model discloses a controlling means of selection valve, including first trachea, second trachea, piston rod sleeve and control valve, press the cap middle part to have the district of wall, piston rod and the hole sliding fit who cuts off the district, piston rod and piston rod sleeve difference sliding connection are in the pressure cap that cuts off the district both sides to the cavity that cuts off between district's one end and the piston rod step face is first air chamber, and the cavity that cuts off between district's other end and the piston rod sleeve terminal surface is the second air chamber, the top at the valve body is installed to the control valve to the air inlet of control valve communicates with each other with the air inlet in the valve body, and the control valve has two gas outlets, and wherein first gas outlet is equipped with the valve inside subassembly that is used for the first gas outlet of break -make through first trachea and first air chamber intercommunication, second gas outlet through second trachea and second air chamber intercommunication in the control valve. After adopting this kind of structure, the leakproofness of valve department is better, avoid the deformation of piston rod simultaneously, guaranteed the normal work of selection valve.

Description

The control device of selector valve

Technical field

This utility model relates to the technical field of valve, is especially the control device of a kind of selector valve playing open close valve function in fire-fighting fire extinguishing gas long-distance sand transport system.

Background technology

Selector valve is a vitals in gas extinguishing system, is arranged between manifold trunk and guard plot fire extinction pipeline, is used for controlling the break-make of fire-fighting fire extinguishing gas long-distance sand transport.In combination distribution fire extinguishing system, each guard plot must be equipped with a corresponding selector valve, when guard plot has fire signal to send, the fire-extinguishing bottle corresponding with guard plot is activated, gas opens the container value on corresponding selector valve and fire-extinguishing bottle successively along starting pipe, being discharged by extinguishing chemical, extinguishing chemical arrives manifold trunk along high-pressure hose, then puts out a fire in arrived the guard plot of corresponding breaking out of fire by selector valve.

The selector valve of prior art, as shown in accompanying drawing 1～accompanying drawing 3, it includes having the valve body 03 of air inlet 01 and gas outlet 02, piston rod 04, pressure cap 011 and by driving Component driver piston rod 04 for opening and closing the cylinder 05 of valve.In one end of piston rod 04 is slidably fitted in valve body 03 and being formed for break-make air inlet 01 and the valve of gas outlet 02 with valve body 03, the other end is slidably connected in pressure cap 011, and pressure cap 011 is connected on valve body 03.Assembly is driven to include pressure arm 09, holding screw 010, handle 08, rotating shaft 07, pivoted arm 06 and spring leaf 012；One end of pressure arm 09 is rotatably connected on pressure cap 011, the other end is step end, one end of spring leaf 012 is connected on pressure cap 011, and the other end is pushed against the step bottom portion of pressure arm 09, and the step end of pressure arm 09 is upspring by spring leaf 012 by the half-round position locking in rotating shaft 07 or disengagement；Holding screw 010 is threaded in pressure arm 09, and the upper surface of the lower end of holding screw 010 and piston rod 04 compresses or disengages；Handle 08 and pivoted arm 06 are both connected in rotating shaft 07, and the lower end of pivoted arm 06 pushes against with the piston rod free end in cylinder 05.

The operation principle of above-mentioned this selector valve is: during work, pushed pivoted arm 06 by piston rod in cylinder 05 to rotate, thus drive rotating shaft 07 to rotate counterclockwise, or pulled rotating shaft 07 by handle 08 to rotate counterclockwise, the active force being pressed in pressure arm 09 step end is unclamped at the semicircle position of rotating shaft 07, elastic force effect hold 09 at spring leaf 012 is provided with the trend rotated counterclockwise, holding screw 010 is made to lose the pressure to piston rod 04 end, piston rod 04 moves up under the effect of air inlet 01 internal pressure differences simultaneously, thus open valve, gas from air inlet 01 through flow direction valve gas outlet 02；After completing work, then need, piston rod 04 head pressure pressure pressure arm 09 simultaneously, to overcome the elastic force effect of spring leaf 012, make the step end of pressure arm 09 realize auto lock after entering the semicircle position of rotating shaft 07, close valve.

But, the selector valve of above-mentioned this structure there is the problem that

1) due to the gas with pressure full in valve body, under this pressure effect, holding screw holds out against the top of piston rod then can easily cause piston rod part deformation, piston rod, once deform, can affect the interior interporal lacuna of the pressure cap being slidably matched with it, the open and close ultimately causing valve are the most extremely difficult, even cause the phenomenon that valve is stuck, make selector valve normally to work；

2) nominal operating pressure of valve is the biggest, act on the power on the piston rod in valve the biggest, same purpose is the biggest at the active force suffered by the pressure arm of piston rod part, therefore the problem brought is: first, pressure arm and the bearing pin at the place of being rotationally connected of pressure cap and the rotating shaft that the step end of pressure arm is locked on pressure cap be the most easily deformed；Second, when needing valve opening, in order to open the locking active force of pressure arm step end and rotating shaft semicircle position, then need the active force acting on handle bigger, or the cylinder specification installed is bigger, then operating difficulties, cost height；

3) nominal operating pressure of valve is the biggest, piston rod is under the effect of air inlet gases at high pressure, moment at valve opening, the snap action that piston rod slides in pressure cap is fierce, make the reversion impulse force acting on pressure arm the biggest, thus there is unsafe hidden danger, and piston rod have impact on sealing property when valve upper is once closed under clashing into fiercely；

4) additionally, after having worked, pressure arm to be depressed while needing piston rod part to depress, the most just can overcome the effect of the torsion spring connected on the elastic force effect of spring leaf and pivoted arm, the step end that just can make pressure arm enters the semicircle position of rotating shaft and realizes locking, just can close the door valve, therefore, troublesome poeration, laborious.

Utility model content

Technical problem to be solved in the utility model is to provide that a kind of valve opening is light, the control device of the selector valve of action safety and precise.

For solving above-mentioned technical problem, the control device of the selector valve that this utility model provides, including inside, there is air inlet and the valve body of gas outlet, step-like piston rod and pressure cap, piston rod is slidably connected in valve body, and one end of piston rod forms valve with valve body, the other end is connected with pressure cap, and pressure cap is connected on valve body；It also includes the first trachea, the second trachea, piston rod sleeve and control valve；The axis horizontal of piston rod is arranged, and pressure cap is connected to the side of valve body；Having exclusion region in the middle part of described pressure cap, piston rod is slidably matched with the endoporus of exclusion region；Piston rod and piston rod sleeve are slidably connected in the pressure cap of exclusion region both sides respectively, and the chamber between exclusion region one end and piston rod step face is the first air chamber, and the chamber between the exclusion region other end and piston rod sleeve end face is the second air chamber；Control valve is arranged on the top of valve body, and the air inlet of control valve communicates with the air inlet in valve body, control valve has two gas outlets, wherein first gas outlet the first trachea and the connection of the first air chamber, second gas outlet the second trachea and the connection of the second air chamber, be provided with the valve inside assembly for break-make the first gas outlet in control valve.

Described control valve includes base, joint body, upper valve inside, lower valve inside and sealing plug, base lower end is fixedly connected on the top of valve body, the lower end of joint body is connected to the upper end of base, bottom the joint body that sealing plug is connected in base, there is in joint body valve pocket, upper valve inside and lower valve inside are slidably fitted in valve pocket in the state that pushes against up and down, upper valve inside forms valve with the joint body of valve pocket upper end, and lower valve inside lower end is positioned at the deep gouge of sealing plug and forms lower valve bottom deep gouge.

The lower end of described lower valve inside is provided with the little spring with reset response, and the lower end of little spring pushes against with the deep gouge bottom land of sealing plug, and upper end pushes against with the shaft shoulder on lower valve inside.

Having the 3rd air chamber bottom described joint body and between the mounting groove bottom land of base, and base is provided with the first gas passage, the two ends of the first gas passage are respectively communicated with the air inlet in the 3rd air chamber and valve body；The first described gas outlet and the second gas outlet are respectively arranged on the both sides of joint body, and the first gas outlet connects with valve pocket, and the second gas outlet is connected by the second gas passage on joint body and the 3rd air chamber；Having air vent on described joint body, this air vent is connected with valve pocket by upper valve or disconnects.

The the first described air chamber pressure cap sidewall near exclusion region end is provided with the 3rd gas passage being radially arranged, and the 3rd gas passage is connected by joint and the first trachea；The the second described air chamber pressure cap sidewall near exclusion region end is provided with the 4th gas passage being radially arranged, and the 4th gas passage is connected by joint and the second trachea.

After using above structure, this utility model compared with prior art, has the advantage that

1) owing to valve body inner piston rod is in being horizontally disposed with, the valve formed with valve body its open and close be sealed into axial end face end face, simultaneously in air inlet under the effect of gas pressure, add power on the piston rod being pressed at valve and increase, therefore, the better tightness at valve；Avoid the deformation of piston rod, it is ensured that the normal work of selector valve simultaneously；

2) when opening valve, only at the joint body of control valve, just need to can back down valve inside by the least power, simultaneously close off lower valve inside, after in the gas in the first air chamber is by the first trachea, the first gas outlet of control valve, valve pocket and air vent exits valve body, gas pressure in first air chamber declines, thus opens valve；Therefore, the nominal operating pressure of tube valve does not has much, and the unlatching of valve is the most easily, flexibly, easy to operate, it is not necessary to increase the specification of related components, thus cost is lower；

3) between piston rod and pressure cap, it is provided with big spring, makes the movement of piston rod be provided with cushioning effect, thus when preventing valve from opening, piston rod moves suddenly under the effect of gas pressure difference, it is ensured that the safety of piston rod movement；And after hours, piston rod automatic-closing valve under the effect of big spring, it is not necessary to adjust and reset.

Accompanying drawing explanation

Fig. 1 is the structural representation of selector valve in prior art.

Fig. 2 is the structural representation in A-A direction in Fig. 1.

Fig. 3 is the structural representation in B direction in Fig. 1.

Fig. 4 is the structural representation controlling device of this utility model selector valve.

Fig. 5 is the structural representation in C direction in Fig. 4.

Fig. 6 is the structure for amplifying schematic diagram of control valve in this utility model.

Wherein:

Prior art: 01, air inlet；02, gas outlet；03, valve body；04, piston rod；05, cylinder；06, pivoted arm；07, rotating shaft；08, handle；09, pressure arm；010, holding screw；011, pressure cap；012, spring leaf；

This utility model: 1, air inlet；2, gas outlet；3, valve body；4, the first trachea；5, the second trachea；6, the first gas outlet；7, the second gas outlet；8, air vent；9, piston rod sleeve；10, the first air chamber；11, the second air chamber；12, the 3rd gas passage；13, the 4th gas passage；14, exclusion region；15, pressure cap；16, piston rod；17, base；18, sealing plug；19, joint body；20, little spring；21, lower valve inside；22, upper valve inside；23, the 3rd air chamber；24, the first gas passage；25, the second gas passage；26, deep gouge；27, valve pocket.

Detailed description of the invention

With detailed description of the invention, this utility model is described in more detail below in conjunction with the accompanying drawings.

From the structural representation controlling device of this utility model selector valve shown in Fig. 4～Fig. 6, it includes that inside has the valve body 3 of air inlet 1 and gas outlet 2, step-like piston rod 16 and pressure cap 15, piston rod 16 is slidably connected in valve body 3, and one end of piston rod 16 and valve body 3 form valve, the other end is connected with pressure cap 15, and pressure cap 15 is connected on valve body 3.It also includes first trachea the 4, second trachea 5, piston rod sleeve 9 and control valve；The axis horizontal of piston rod 16 is arranged, and pressure cap 15 is connected to the side of valve body 3.Having exclusion region 14 in the middle part of described pressure cap 15, piston rod 16 is slidably matched with the endoporus of exclusion region 14.Piston rod 16 and piston rod sleeve 9 are slidably connected in the pressure cap 15 of exclusion region 14 both sides respectively, and the chamber between exclusion region 14 one end and piston rod 16 step surface is the first air chamber 10, the chamber between exclusion region 14 other end and piston rod sleeve 9 end face is the second air chamber 11.Control valve is arranged on the top of valve body 3, and the air inlet of control valve communicates with the air inlet in valve body 3, control valve has two gas outlets, wherein the first gas outlet 6 connects with the first air chamber 10 through the first trachea 4, second gas outlet 7 connects with the second air chamber 11 through the second trachea 5, is provided with the valve inside assembly for break-make the first gas outlet 6 in control valve.

Described control valve includes base 17, joint body 19, upper valve inside 22, lower valve inside 21 and sealing plug 18, base 17 lower end is fixedly connected on the top of valve body 3, the lower end of joint body 19 is connected to the upper end of base 17, bottom the joint body 19 that sealing plug 18 is connected in base 17, there is in joint body 19 valve pocket 27, upper valve inside 22 and lower valve inside 21 are slidably fitted in valve pocket 27 in the state that pushes against up and down, upper valve inside 22 forms upper valve with the joint body 19 of valve pocket 27 upper end, lower valve inside 21 lower end is positioned at the deep gouge 26 of sealing plug 18 and forms lower valve bottom deep gouge 26.

The lower end of described lower valve inside 21 is provided with the little spring 20 with reset response, and the lower end of little spring 20 pushes against with deep gouge 26 bottom land of sealing plug 18, and upper end pushes against with the shaft shoulder on lower valve inside 21.

Having the 3rd air chamber 23 bottom described joint body 19 and between the mounting groove bottom land of base 17, and base 17 is provided with the first gas passage 24, the two ends of the first gas passage 24 are respectively communicated with the air inlet 1 in the 3rd air chamber 23 and valve body 3.The first described gas outlet 6 and the second gas outlet 7 are respectively arranged on the both sides of joint body 19, and the first gas outlet 6 connects with valve pocket 27, and the second gas outlet 7 is connected with the 3rd air chamber 23 by the second gas passage 25 on joint body 19.Having air vent 8 on described joint body 19, this air vent 8 is connected with valve pocket 27 by upper valve or disconnects.

The the first described air chamber 10 pressure cap 15 sidewall near exclusion region 14 end is provided with the 3rd gas passage 12 being radially arranged, and the 3rd gas passage 12 is connected by joint and the first trachea 4.The the second described air chamber 11 pressure cap 15 sidewall near exclusion region 14 end is provided with the 4th gas passage 13 being radially arranged, and the 4th gas passage 13 is connected by joint and the second trachea 5.

In the present embodiment, being applied on joint body 19 top opening for backing down the upper valve at upper valve inside 22 can be with mechanical, electronic, the pneumatic and various ways such as manually.

Work process of the present utility model is as follows:

1, during valve-closed state, gas is under air inlet 1 pressure effect, and a road flows to the second air chamber 11 after first gas passage the 24, the 3rd air chamber the 23, second gas passage the 25, second gas outlet the 7, second trachea the 5, the 4th gas passage 13；Another road through the first gas passage the 24, the 3rd air chamber 23, back down lower valve inside 21 and close and close after valve inside 22 enters valve pocket the 27, first gas outlet the 6, first trachea the 4, the 3rd gas passage 12 and flow to the first air chamber 10；Due to the compression area of piston rod sleeve 9 during piston rod 16 step surface compression area is more than the second air chamber 11 in the first air chamber 10, piston rod 16 is made to have the trend moved to the left side expressed by diagram, so that the sealing surface pressurized of piston rod 16 end, it is ensured that the closed mode of valve.

2, during Open valve, only need to press downwards in joint body 19 upper end, backing down the upper valve at valve inside 22 and close the lower valve at lower valve inside 21, the gas in the first air chamber 10 is discharged after the 3rd gas passage the 12, first trachea the 1, first gas outlet 6, valve pocket 27, upper valve at air vent 8；Now; gas pressure in first air chamber 10 reduces, and the gas-pressure protection in the second air chamber 11 is constant and creates pressure differential with the first air chamber 10, and piston rod sleeve 9 drives piston rod 16 to move to the right; thus open valve, gas from air inlet 1 through flow direction valve gas outlet 2.

3, after having worked, valve body external and internal pressure is consistent, and piston rod 16 moves under the effect of big spring automatically to the left, until closing valve；Act on the active force on valve inside 22 simultaneously at releasable joint body 19, enter readiness for operation next time.

The above; it it is only the most feasible enforcement example of this utility model; can not the most i.e. limit to interest field of the present utility model; for those skilled in the art, other various corresponding changes that all utilization the technical solution of the utility model and technology design are made all should belong within this utility model scope of the claims.

Claims (5)

1. the control device of a selector valve, including inside, there is the valve body (3) of air inlet (1) and gas outlet (2), step-like piston rod (16) and pressure cap (15), piston rod (16) is slidably connected in valve body (3), and one end of piston rod (16) forms valve with valve body (3), the other end is connected with pressure cap (15), and pressure cap (15) is connected on valve body (3)；It is characterized in that: it also includes the first trachea (4), the second trachea (5), piston rod sleeve (9) and control valve；The axis horizontal of piston rod (16) is arranged, and pressure cap (15) is connected to the side of valve body (3)；Described pressure cap (15) middle part has exclusion region (14), and piston rod (16) is slidably matched with the endoporus of exclusion region (14)；Piston rod (16) and piston rod sleeve (9) are slidably connected in the pressure cap (15) of exclusion region (14) both sides respectively, and the chamber between exclusion region (14) one end and piston rod (16) step surface is the first air chamber (10), the chamber between exclusion region (14) other end and piston rod sleeve (9) end face is the second air chamber (11)；Control valve is arranged on the top of valve body (3), and the air inlet of control valve communicates with the air inlet in valve body (3), control valve has two gas outlets, wherein the first gas outlet (6) connect with the first air chamber (10) through the first trachea (4), second gas outlet (7) connects with the second air chamber (11) through the second trachea (5), is provided with the valve inside assembly for break-make the first gas outlet (6) in control valve.

nullThe control device of selector valve the most according to claim 1，It is characterized in that: described control valve includes base (17)、Joint body (19)、Upper valve inside (22)、Lower valve inside (21) and sealing plug (18)，Base (17) lower end is fixedly connected on the top of valve body (3)，The lower end of joint body (19) is connected to the upper end of base (17)，Joint body (19) bottom that sealing plug (18) is connected in base (17)，There is in joint body (19) valve pocket (27)，Upper valve inside (22) and lower valve inside (21) are slidably fitted in the state that pushes against up and down in valve pocket (27)，Upper valve inside (22) and valve in joint body (19) formation of valve pocket (27) upper end，Lower valve inside (21) lower end is positioned at the deep gouge (26) of sealing plug (18) and forms lower valve with deep gouge (26) bottom.

The control device of selector valve the most according to claim 2, it is characterized in that: the lower end of described lower valve inside (21) is provided with the little spring (20) with reset response, the lower end of little spring (20) pushes against with deep gouge (26) bottom land of sealing plug (18), and upper end pushes against with the shaft shoulder on lower valve inside (21).

The control device of selector valve the most according to claim 2, it is characterized in that: between described joint body (19) bottom and the mounting groove bottom land of base (17), there is the 3rd air chamber (23), and base (17) is provided with the first gas passage (24), the two ends of the first gas passage (24) are respectively communicated with the air inlet (1) in the 3rd air chamber (23) and valve body (3)；Described the first gas outlet (6) and the second gas outlet (7) are respectively arranged on the both sides of joint body (19), and the first gas outlet (6) connect with valve pocket (27), the second gas outlet (7) are connected with the 3rd air chamber (23) by the second gas passage (25) on joint body (19)；Having air vent (8) on described joint body (19), this air vent (8) is connected by upper valve with valve pocket (27) or disconnects.

The control device of selector valve the most according to claim 4, it is characterized in that: described the first air chamber (10) pressure cap (15) sidewall near exclusion region (14) end is provided with the 3rd gas passage (12) being radially arranged, the 3rd gas passage (12) is connected by joint and the first trachea (4)；Described the second air chamber (11) pressure cap (15) sidewall near exclusion region (14) end is provided with the 4th gas passage (13) being radially arranged, and the 4th gas passage (13) is connected by joint and the second trachea (5).