CN208634461U - A kind of self-operated type ball valve - Google Patents

Abstract

A kind of self-operated type ball valve, including ball valve and uniform-pressure-drop valve, ball valve have four-way valve body, and sphere and valve seat are equipped in the inner bore cavity one of valve body, is equipped with upper valve rod in the through-hole of upper shell；The inner bore cavity of sphere second is that one with sphere is concentric, segments greater than 180 °；The lower end of sphere is machined with circular hole, and center line is consistent with the vertical center line of sphere, to be connected to cavity two and cavity one, is machined with throttle orifice on the ball wall on right side；After uniform-pressure-drop valve is connected on throttle orifice, including including the regulator in bottom cover, diaphragm, lower valve rod, guide sleeve, gasket and cavity five between bottom cover and diaphragm；When medium passes through throttle orifice, it if fluctuated into and out of water hole hydraulic pressure, since the pressure compensation of uniform-pressure-drop valve acts on, can guarantee that the pressure difference at throttle orifice both ends is constant, to guarantee that output flow is constant, make the temperature-resistant of controlled environment.

Description

A kind of self-operated type ball valve

Technical field

The utility model relates to ball valve field, especially a kind of self-operated type ball valve.

Background technique

Ball valve is adjusting flow in recent years since it has many advantages, such as compact-sized, good seal performance and easy to operate Be functionally widely used because the logical of certain discharge characteristic shape is provided in processing on the ball wall of hollow sphere Hole just can conveniently realize sphere aperture and the functional relation by flow, and ball valve is made to have certain discharge characteristic, such as straight line Discharge characteristic, equal percentage flow characteristic, quick open flow characteristic and the special linear flow rate characteristic of throwing etc..Such as within air-conditioning systems, it controls System processed generally uses Linear Control, and the specific method is as follows: the characteristic of coil pipe be just started small flow input can cause it is big Heat output, then as the flow rate increases, and the slope of heat output can gradually ease up (Fig. 3-I), and equal percentage characteristics ball Valve only provides small flow in rigid start, and then with the increase of aperture, the slope of output flow is gradually increased (Fig. 3-II), The two compensates mutually, compound linear (Fig. 3-III).The shortcoming of this control method is, when the aperture of sphere, i.e. hole After the opening area of (throttle orifice) determines, if the pressure oscillation of import or export causes hole front and back pressure difference to change, lead to The flow of via hole is no longer the desired flow rate of of former design requirement, but is changed according to pressure difference and fluctuated, and is especially pressed before and after hole In the lesser situation of difference, this will will cause, and air-conditioning system is out of control, keeps the temperature of controlled environment sometimes hot and sometimes cold, user is allowed to feel not It is comfortable, and waste of energy.

Utility model content

Purpose of the utility model is to solve the above-mentioned technical deficiencies of ordinary ball valve, provide a kind of guarantee valve work Pressure difference when making before and after throttle orifice remains unchanged, to guarantee that output flow is constant, make that controlled environment temperature remains unchanged from Power formula ball valve.

The specific technical solution of the utility model is:

A kind of self-operated type ball valve, including ball valve and uniform-pressure-drop valve, ball valve have four-way valve body 1, valve body right end through-hole Outside is annular end face, and the through-hole of valve body left end cylinder is apopore E, and the through-hole of upper and lower cylinder is on same vertical axis, valve Sphere 2 and valve seat 3 are installed in one C1 of inner bore cavity of body, are equipped with upper valve rod 5 in the through-hole of upper shell；The inner cavity of the sphere Two C2 of cavity is one and the body concentric segment of ball, and the upper plane of segment is vertical with the vertical center line of sphere；The lower end of sphere It is machined with circular hole d, center line is consistent with the vertical center line of sphere, to be connected to one C1 of two C2 of cavity and cavity, the ball on right side Throttle orifice H is machined on wall；After uniform-pressure-drop valve is connected on throttle orifice H, including bottom cover 22, diaphragm 19, lower valve rod 29, gasket 13, the regulator in guide sleeve 32 and five C5 of cavity between bottom cover and diaphragm.

Preferably, two jump-ring slots are machined in 1 lower through-hole of valve body, to be led with two 31 axial restraints of circlip To set 32, lower through-hole is separated into not connected four C4 of three C3 of cavity and cavity by guide sleeve；The top of three C3 of cavity is equipped with water Flat partition wall W, partition wall W are equipped with circular hole e, to be connected to one C1 of three C3 of cavity and cavity；The lower end of circular hole e has one downwardly projecting The annular sword side of narrower in width, as the valve seat of valve port V, the center line of circular hole e is consistent with the vertical center line of valve body 1；Under The neck of cylinder has an inclined convex block G, convex block G to be equipped with kidney slot A, is connected to apopore E and three C3 of cavity；Under lower shell It is machined with annular groove on the lower end surface of flange, to be embedded in the margo of diaphragm 19.

Preferably, the inner hole slide fit of the lower valve rod and guide sleeve, lower valve rod passes through the first nut 27, pressing plate 28 and film Piece and spring base 21 are connected；The margo of diaphragm is clipped between valve body lower flange and the flange of bottom cover, and by several pairs Bolt 16, washer 17, the second nut 18 are pressed in the annular groove of valve body lower flange end face；Regulator includes: pressure regulation spiral shell Bar 23, the Adjusting bolt Adjusting screw 26 screwed with screw press, spring base 21 and spring 30, spring setting spring base and guide sleeve it Between；Lower valve rod 29 is made of the flange of valve rod and top, and the center of valve rod is machined with aperture b, and lower part is machined with cross through hole g, So that two C2 of cavity is communicated with four C4 of cavity, gasket 23 is arranged in the groove of flange, and fixed by circlip 2 33, gasket With the valve port V of the annular sword side composition uniform-pressure-drop valve protruded below the e of hole；Bottom cover 22 is made of cylinder and flange, adjusting screw rod And Adjusting bolt Adjusting screw is located in the cavity five of cylinder；The wall of cylinder is equipped with aperture b1；Plane bearing 25 is to when reducing pressure regulation Rotating torque.

Preferably, being connected in annular end face on the outside of 1 right end of valve body has right cap 10, cylinder with cylinder It is equipped with aperture a, the inner hole of cylinder is inlet opening I, and aperture a passes through the aperture b1 on pipeline 12, connector 20 and 22 cylinder of bottom cover Connection, so that inlet opening I is communicated with five C5 of cavity.

Compared with prior art, the utility model has the beneficial effects that in the self-operated type ball valve use process, rotating ball Body, the opening area of hole H is from large to small up to closing, or changes from small to big until standard-sized sheet；When in air-conditioning system, throttle orifice Size temperature needed for controlled environment of H opening determines, it is desirable that when temperature is turned up, by hot water it is just more, aperture is with regard to big；Instead It, aperture is with regard to small.When sphere 2 be located in it is a certain require position when, the size of hole H opening is just it has been determined that this patent can guarantee works as When fluctuating into and out of water hole hydraulic pressure, the pressure difference at bis- end throttle orifice H is constant, to guarantee that output flow is constant, makes controlled environment It is temperature-resistant, allow user to feel comfortable, and energy saving.

Detailed description of the invention

Fig. 1: the longitudinal sectional view of the utility model

M direction view in Fig. 2: Fig. 1, shape and position when the H standard-sized sheet of aperture

Fig. 3: I--- coil pipe characteristic curve, II---- equal percentage characteristics valve characteristic curve and wait III----- coil pipe Ideal effect curve after percentage characteristic valve combination.

In figure, valve body 1, sphere 2, valve seat 3, O-ring seals 1, upper valve rod 5, swivel nut 6, gasket 7, screw 8, spring washer 9, Right cap 10, O-ring seal 2 11, pipeline 12, gasket 13, O-ring seals 3 14, O-ring seals 4 15, bolt 16, pad Enclose the 17, second nut 18, diaphragm 19, connector 20, spring base 21, bottom cover 22, adjusting screw rod 23, o shape sealing ring 5 24, plane axis Hold 25, Adjusting bolt Adjusting screw 26, the first nut 27, pressing plate 28, lower valve rod 29, spring 30, circlip 31, guide sleeve 32, circlip 33, water inlet Hole I, apopore E, throttle orifice H, kidney slot A, circular hole e, aperture a, aperture b, aperture b1, through-hole g, circular hole d, circular hole e, through-hole g, Partition wall W, convex block G, valve port V, one C1 of cavity, two C2 of cavity, three C3 of cavity, four C4 of cavity, five C5 of cavity.

Specific embodiment

The utility model is described further shown in reference to the accompanying drawing.

As shown in attached drawing 1, attached drawing 2, attached drawing 3:

The utility model includes two part of ball valve and uniform-pressure-drop valve.Ball valve includes that valve body 1, sphere 2, valve seat 3, O shape are close Seal 1, upper valve rod 5, swivel nut 6, gasket 7, right cap 10, O-ring seal 2 11.Valve body 1 is a four-way valve body, left end cylinder Through-hole be apopore E, be located on same level axis with right end through-hole, the through-hole of upper lower shell on same vertical axis, Two axis intersect vertically；Have a circular pit on the inner wall of apopore E right end inner cavity, the flange of left end and downstream line it is corresponding Threaded connection can be used for small-aperture ball valve in flanged joint；The through-hole diameter of 1 right end of valve body is slightly larger than the diameter of sphere 2, with Just in one C1 of inner bore cavity that sphere 2 and valve seat 3 can be fitted into valve body 1 in assembly；The right end of valve body 1 has an annular end face, Its center line is consistent with the horizontal center line of valve body 1, there is 6-8 only uniformly distributed screw hole on end face；It is machined in the lower through-hole of valve body 1 Two jump-ring slots, to two 31 axial restraint guide sleeves 32 of circlip, lower through-hole is separated into not connected by guide sleeve 32 Four C4 of three C3 of cavity and cavity；In the neck of lower through-hole cylinder, there is an inclined convex block G, be equipped with kidney slot A in convex block G and be connected to Three C3 of apopore E and cavity；The top of three C3 of cavity is equipped with horizontal partition wall W, and partition wall W is equipped with circular hole e, to be connected to cavity three One C1 of central cavity of C3 and valve body 1, there is the annular sword side of a downwardly projecting narrower in width in the lower end of circular hole e, as valve port V Valve seat, the center line of circular hole e is consistent with the vertical center line of valve body 1；The flange and uniform-pressure-drop valve bottom cover of lower shell lower end Several pairs of bolts 16 of 22 flange, washer 17 and the connection of the second nut 18；On the lower end surface of flange of lower shell, it is machined with annular Groove, to install and fix diaphragm 19.

The middle part of right cap 10 is a cylinder, and center is equipped with inlet opening I, and barrel is equipped with aperture a, the diameter of inlet opening I It is consistent with the diameter of apopore E；Two ends of right cap are flanges, and right end flange is used to connect with the respective flange of upstream line, Threaded connection can be used for small-aperture ball valve；The outer diameter of left end flange is consistent with the outer diameter of 1 right end annular end face of valve body, flange On have 6~8 uniformly distributed through-holes, matched with 6~8 screw holes on 1 right end annular end face of valve body；There is a circle on the left side of left end flange Shape boss, boss outer diameter and the right through-hole slide fit of valve body 1, there is a circular pit at the center of boss, passes through several pairs of screws 8 and spring washer 9 are fixed on right cap 10 on the annular end face of 1 right end of valve body；Inlet opening I is consistent with the center line of apopore E after installation；O shape Sealing ring=11 are to prevent medium from leaking outside.

Valve seat 3 also plays sealing function, is made of polymeric material, such as polytetrafluoroethylene (PTFE) (PTFE) elastomeric material.Valve The internal diameter of seat 3 is more bigger than the diameter of apopore E；Two valve seats 3 are separately positioned on cavity wall and side in 1 apopore E right end of valve body In the 10 corresponding circular pit of left end boss of lid, by adjusting the thickness of gasket 7, by the equal compression adjusted to sphere 2 of screw 8 Degree not only guarantees to seal, but also guarantees rotating torque appropriate, and after sphere 2 positions, center is located substantially on the level of valve body 1 On the intersection point of axis and vertical axis.

In the dynamic upper through-hole for fitting over valve body 1 of upper valve rod 5, there is a cotter pilotage in 5 lower end of upper valve rod, and two sides of cotter pilotage and sphere 2 push up The groove pine in portion is matched, slightly gap, has certain amount of movement to make sphere 2 in the horizontal direction when compressing sphere 2.Upper valve rod The small axis of 5 upper ends is connect with handle or motor, drives sphere 2 to rotate by rotation upper valve rod, to adjust the aperture of throttle orifice H； Axial position of the swivel nut 6 to limit upper valve rod 5, O-ring seals 1 to prevent medium from leaking outside, 1 upper shell upper end of valve body Flange is used to install the aperture instruction disk of motor or sphere 2.

Sphere 2 be it is hollow, two C2 of cavity be one with sphere 2 is concentric, segments greater than 180 °, segment it is upper flat Face is vertical with the vertical center line of sphere 2；The consistent circle of vertical center line of lower end the processing own centre line and sphere 2 of sphere 2 Hole d is machined with the throttle orifice H (ginseng with particular flow rate characteristic to be connected to one C1 of two C2 of cavity and cavity on the ball wall on right side According to Fig. 2)；The top of sphere 2 is machined with elongated slot, and the symmetrical plane of elongated slot passes through the vertical center line of sphere 2, to guarantee sphere 2 Rotation axis it is consistent with the vertical center line of sphere 2, the edge cutting elastomeric of throttle orifice H when sphere 2 rotates in order to prevent There is smooth rounding at valve seat 3, the edge of throttle orifice H

Uniform-pressure-drop valve is by bottom cover 22, adjusting screw rod 23, Adjusting bolt Adjusting screw 26, o shape sealing ring 5 24, plane bearing 25, film Piece 19, pressing plate 28, spring base 21, spring 30, lower valve rod 29, guide sleeve 32, gasket 13, circlip 33 and O-ring seals 3 14, The equal parts composition of O-ring seals 4 15.The inner hole slide fit of lower valve rod 29 and guide sleeve 32, O-ring seals 3 14 and O-ring seals 4 15 let out in medium to prevent, and lower valve rod 29 is connected by the first nut 27, pressing plate 28 and diaphragm 19, spring base 21； The margo of diaphragm 19 is clipped between 1 lower flange of valve body and the flange of bottom cover 22, and by several pairs of bolts 16, washer 17 Two nuts 18 etc. are pressed in the annular groove of 1 lower flange end face of valve body, have not only secured diaphragm 19, but also seal；Spring 30 are arranged between spring base 21 and guide sleeve 32；Lower valve rod 29 is made of the flange of valve rod and top, the center processing of valve rod There is aperture b, lower part is machined with cross through hole g, by two C2 of cavity, i.e. to there is pressure medium to be introduced into four C4 of cavity after hole H, Gasket 13 is arranged in the groove above flange, and fixed by circlip 2 33, the annular sword of gasket 13 and the lower section hole e protrusion The valve port V of side composition uniform-pressure-drop valve.

Bottom cover 22 is made of cylinder and flange, is provided with adjusting screw rod 23 in five C5 of cavity between cylinder and diaphragm 19 And Adjusting bolt Adjusting screw 26 etc., plane bearing 25 is to reduce turning moment when pressure regulation, and O-ring seals 5 24 are to prevent outside medium Leakage；Aperture b1 is machined on the wall of cylinder.Aperture a on 10 cylinder of right cap is connected by pipeline 12 and connector 20 and aperture b1 It connects, to by inlet pressure water, i.e. pressure water before hole H is introduced into five C5 of cavity.

By above-mentioned introduction it is found that the hydraulic pressure P1 phase of hydraulic pressure and inlet opening I in five C5 of hydraulic pressure and cavity before throttle orifice H Together；After throttle orifice H, i.e. hydraulic pressure P2 in two C2 of cavity is identical with the hydraulic pressure in four C4 of one C1 of cavity and cavity；In three C3 of cavity Hydraulic pressure it is identical as the hydraulic pressure P3 of apopore E.

Working principle

Rotating sphere 2, the opening area of throttle orifice H is from large to small until close, or changes from small to big until standard-sized sheet, when being used for When in air-conditioning system, hole H opening size is determined by the temperature needed for control environment, it is desirable that temperature height-regulating when, by heat Water is just more, and aperture is with regard to big；Conversely, aperture is with regard to small.When sphere 2 be located in it is a certain require position when, throttle orifice H opening size just It has been determined that when import and export hydraulic pressure fluctuates, since this patent can guarantee that the pressure difference before and after throttle orifice H remains unchanged, in this way By flow it is also constant, do not influenced by into and out of water hole water pressure fluctuations.

The working principle of the utility model is as follows: before water flowing, lower valve rod 29 drops to lowest order under the action of spring 30 It sets, at this time valve port V standard-sized sheet；After water flowing, pressure water through aperture a, pipeline 12, into cavity C5, and act on the lower section of diaphragm 19, Lower valve rod 29 is pushed to move upwards, valve port V is turned down, and throttling action increases, and the hydraulic pressure in two C2 of cavity increases.Two C2 of cavity simultaneously Interior water enters in four C4 of cavity through the aperture b and g of lower valve rod 29, and acts on the top of diaphragm 19；When acting on diaphragm 19 When the power of upper and lower and the setting dynamic balance of spring 30, valve port V is in ideal design position, at this time the pressure difference △ before and after the H of hole P=F/S (sees below explanation), the setting power of F- spring 30, the effective active area of S-diaphragm 19 in formula.The pressure water of inlet opening I It downstream supplies water through throttle orifice H, two C2 of cavity, one C1 of cavity, hole e, valve port V, three C3 of cavity, kidney slot A and apopore E, by In the effect of uniform-pressure-drop valve, guarantee that output flow is constant.

When intake pressure P1 is increased, the hydraulic pressure in cavity C5 is also accordingly increased, and the thrust for acting on 19 lower section of diaphragm increases Greatly, lower valve rod 29 is pushed to move upwards, valve port V reduces, and throttling action increases, and the hydraulic pressure P2 in two C2 of cavity is increased, directly Pressure difference △ P=P1-P2 to bis- end hole H is remained unchanged；Conversely, lower valve rod 29 is transported downwards when intake pressure P1 is reduced Dynamic, valve port V increases, and throttling action weakens, and the hydraulic pressure P2 in cavity C2 is reduced, until △ P=P1-P2 is remained unchanged.

When the hydraulic pressure P3 of apopore E is increased, since the raised moment lower valve rod 29 of P3 has little time to act, cavity two Hydraulic pressure P2 is synchronous in C2 increases, and pushes lower valve rod 29 to move downward, valve port V becomes larger, and throttling action weakens, in two C2 of cavity Hydraulic pressure P2 is decreased, until P2 restores to initial value, remains unchanged △ P=P1-P2；Conversely, the hydraulic pressure P3 as apopore E drops When low, lower valve rod 29 is moved upwards, and valve port reduces, and throttling action increases, and the hydraulic pressure P2 in two C2 of cavity is increased, until restoring extremely Initial value remains unchanged △ P=P1-P2.

By above-mentioned self-regulating process it is found that when this valve working, regardless of the pressure of import and export fluctuates, due to fixed Difference pressure-reducing valve carries out pressure compensation to the pressure at bis- end throttle orifice H, remains unchanged its front and back pressure difference, therefore can maintain stable stream Amount.

The pressure difference at bis- end throttle orifice H can be set by the precompression of adjustment spring 30.Screw press 23 is rotated, i.e., Pressure regulation swivel nut 26 can be made to move up and down, to reach the precompression of adjustment spring 30.

The pressure difference △ P at bis- end device to hole H is calculated below:

When lower valve rod 29 is in a certain equilbrium position, the stress balance equation of lower valve rod 29 are as follows:

P1xS=P2xS+K (Xo+X)+G±FM

That is △ P=(P1-P2) xS=K (X0-X)+G ± FM ... (1)

In formula: the pressure before P1--- throttle orifice H

Pressure after P2---- throttle orifice H

The effective active area of S--- diaphragm 19

The weight of the parts such as G--- lower valve rod 29, pressing plate 28, spring 30 and spring base 21

Frictional force when FM-lower valve rod 29 moves

K-spring rate

Xo-- sets the amount of spring compression under pressure difference

The additional variation of spring, can just bear when hydraulic pressure changes before and after the H of the hole X---.

To simplify the calculation, the setting pressure very little because of weight G and frictional force FM with respect to spring, thus it is negligible, (1) formula can simplify are as follows:

△ P=P1-P2=KXo/S+KX/S...... (2)

Due to using biggish diaphragm area S, lesser spring rate K and biggish decrement Xo in the design, and And before and after the H of hole when variation in water pressure spring additional variation X very little, therefore K X/S also can be neglected

(2) formula can simplify are as follows:

△P =P1-P2= K Xo/S=F/S……(3)

F=KXo is the setting pressure of spring 30 in formula.

Claims (4)

1. a kind of self-operated type ball valve, including ball valve and uniform-pressure-drop valve, ball valve has four-way valve body (1), valve body right end through-hole Outside is annular end face, and the through-hole of valve body left end cylinder is apopore (E), the through-hole of upper and lower cylinder on same vertical axis, Sphere (2) and valve seat (3) are installed in the inner bore cavity one (C1) of valve body, are equipped with upper valve rod (5) in the through-hole of upper shell；It is special Sign is: the inner bore cavity two (C2) of the sphere is one and the body concentric segment of ball, the upper plane of segment and hanging down for sphere Straight central axis；The lower end of sphere is machined with circular hole (d), and center line is consistent with the vertical center line of sphere, to be connected to chamber Body two (C2) and cavity one (C1) are machined with throttle orifice (H) on the ball wall on right side；After uniform-pressure-drop valve is connected on throttle orifice (H), Including bottom cover (22), diaphragm (19), lower valve rod (29), gasket (13), guide sleeve (32) and between bottom cover and diaphragm Regulator in cavity five (C5).

2. self-operated type ball valve according to claim 1, it is characterised in that: be machined with two in valve body (1) lower through-hole Jump-ring slot, to two circlip (31) axial restraint guide sleeves (32), lower through-hole is separated into not connected chamber by guide sleeve Body three (C3) and cavity four (C4)；The top of cavity three (C3) is equipped with horizontal partition wall (W), and partition wall (W) is equipped with circular hole (e), uses To be connected to cavity three (C3) and cavity one (C1)；There is the annular sword side of a downwardly projecting narrower in width in the lower end of circular hole (e), makees Center line for the valve seat of valve port V, circular hole (e) is consistent with the vertical center line of valve body (1)；There is an inclination in the neck of lower shell Convex block (G), convex block (G) is equipped with kidney slot (A), is connected to apopore (E) and cavity three (C3)；Under lower shell lower flange Annular groove is machined on end face, to be embedded in the margo of diaphragm (19).

3. self-operated type ball valve according to claim 1, it is characterised in that: the inner hole slide fit of the lower valve rod and guide sleeve, Lower valve rod is connected by the first nut (27), pressing plate (28) with diaphragm and spring base (21)；The margo of diaphragm is clipped in Between valve body lower flange and the flange of bottom cover, and by several pairs of bolts (16), washer (17), the second nut (18) are pressed on valve body In the annular groove of lower flange end face；Regulator includes: screw press (23), the Adjusting bolt Adjusting screw screwed with screw press (26), spring base (21) and spring (30), spring are arranged between spring base and guide sleeve；Lower valve rod (29) is by valve rod and top Flange composition, the center of valve rod is machined with aperture (b), and lower part is machined with cross through hole (g), so that cavity two (C2) and cavity Four (C4) are communicated, and gasket (13) is arranged in the groove of flange, and fixed by circlip two (33), below gasket and hole (e) The valve port (V) of the annular sword side composition uniform-pressure-drop valve of protrusion；Bottom cover (22) is made of cylinder and flange, adjusting screw rod and adjusting Swivel nut is located in the cavity five of cylinder；The wall of cylinder is equipped with aperture (b₁)；Turn when plane bearing (25) is to reduce pressure regulation Kinetic moment.

4. self-operated type ball valve according to claim 1 or 3, it is characterised in that: the looped end on the outside of valve body (1) right end Having side cover (10) with cylinder is connected on face, cylinder is equipped with aperture (a), and the inner hole of cylinder is inlet opening (I), with water outlet Hole (E) is same level axis；Aperture (a) passes through pipeline (12), connector (20) and the aperture ((b on bottom cover (22)₁) connection, So that inlet opening (I) is communicated with cavity five (C5).