CN212616583U - Flow control valve capable of adjusting pressure difference - Google Patents

Abstract

The utility model relates to a flow control valve capable of adjusting pressure difference, which comprises a valve body, a water inlet, a mounting port B, a water outlet, a mounting port C and a main port, wherein the water inlet, the mounting port B, the water outlet and the mounting port C are arranged on the valve body; a flow regulating component is covered on the mounting port C in a sealing way, and an automatic pressure regulating component is packaged on the corresponding mounting port B; the automatic pressure regulating assembly comprises a valve cover matched with the mounting port B, a diaphragm clamped between the valve cover and the valve body mounting port B, a movable valve rod connected with the diaphragm and a valve clack fixedly connected to the upper end of the movable valve rod and arranged corresponding to the main through port; a fixed support seat is sleeved on the movable valve rod between the diaphragm and the valve clack, and a return spring is arranged between the fixed support seat and a spring support arranged at the top of the diaphragm; the lower end of the movable valve rod is sleeved on a differential adjusting mechanism which is arranged on the valve cover in a sliding way. The utility model discloses a case subassembly simple structure, the volume is less, and it is easy to make, assemble, and is with low costs, can realize that pressure differential is accurate to be adjusted, has improved holistic reliability of product, adaptability.

Description

Flow control valve capable of adjusting pressure difference

Technical Field

The utility model relates to a flow control valve technical field, concretely relates to adjustable pressure differential's flow control valve.

Background

With the increasing of urban buildings and the adjustment of enterprise scale, the problem of unbalanced medium flow or cut-off in heating, refrigerating or power energy systems is generated, so that the adjustable differential pressure valve and the flow control valve are widely applied. The adjustable differential pressure valve is characterized in that under the condition of setting differential pressure, the flow can be changed, and the set differential pressure is used as power to keep the constant differential pressure of an inlet and an outlet; the flow control valve is used for controlling the liquid flow by changing the pressure difference under the condition of setting the flow and regulating the relative sizes of a water through hole and an exhaust hole on a switch knob through the rotation of a switch; in contrast, the adjustable differential pressure valve and the flow control valve have single functions and only have one function of adjusting differential pressure or flow. Therefore, it is very significant to provide a flow control valve capable of taking into account flow adjustment and variable differential pressure, however, the existing variable differential pressure flow control valve is already manufactured and used, the differential pressure adjusting range is fixed, the adjustment of the differential pressure range cannot be completed through an adjusting mechanism according to the requirements of a pipe network system, and the application range of the product is narrow; in addition, other defects such as large stroke, complex structure, uncontrollable agility and the like of the differential pressure regulating valve core exist.

Disclosure of Invention

To the above problem, the utility model provides an adjustable pressure differential's flow control valve, case subassembly simple structure, the volume is less, and it is easy to make, assemble, and is with low costs, and easy to assemble can realize that pressure differential is accurate to be adjusted, guarantees that the operating pressure differential of setting for does not change when system's operating mode changes, has improved holistic reliability of product, adaptability. Therefore, the utility model provides a following technical scheme:

a flow control valve capable of adjusting pressure difference comprises a valve body, a water inlet, a mounting port B, a water outlet and a mounting port C, wherein the water inlet, the mounting port B, the water outlet and the mounting port C are arranged on the valve body; a flow regulating component for regulating flow is covered on the mounting port C in a sealing way, and automatic pressure regulating components coaxial with the flow regulating component are sealed in the corresponding mounting port A and the mounting port B;

the automatic pressure regulating assembly comprises a valve cover matched with the mounting port B, a diaphragm clamped between the valve cover and the valve body mounting port B, a movable valve rod connected with the diaphragm and a valve clack fixedly connected to the upper end of the movable valve rod and arranged corresponding to the main through port; a fixed support seat matched with the mounting opening A is sleeved on the movable valve rod between the diaphragm and the valve clack, and a return spring is arranged between the fixed support seat and a spring support arranged at the top of the diaphragm; a pressure plate and a fastener are sleeved on the movable valve rod positioned below the diaphragm; the lower end of the movable valve rod is sleeved on a differential adjusting mechanism which is arranged on the valve cover in a sliding way.

The flow adjusting assembly comprises a valve cover matched with the mounting hole C, an adjusting valve rod, a transmission gear and a flow adjusting cock, wherein the transmission gear and the flow adjusting cock are arranged in the center of the valve cover in a penetrating mode, the lower end of the transmission gear is fixedly arranged, and an adjusting knob meshed with the transmission gear and an adjusting gear at the lower end of the adjusting knob are arranged on one side of the valve cover in a penetrating mode.

Foretell, fixed bolster including the sleeve top facing that supports sleeve and top set up, the sleeve top facing sets up the shaft hole A that is used for making the movable valve pole pass, shaft hole A still set up the water guide hole B that is used for transmitting pressure around, it is provided with the external screw thread district to be located to support the outer circumference of sleeve, is provided with the spring fixed chamber that is used for injecing reset spring on the shaft hole A circumference below being located the sleeve top facing.

The valve clack comprises a valve clack sleeve and a valve clack cover surface on the top end of the valve clack sleeve, a shaft hole B is formed in the center of the valve clack cover surface, a water guide hole A for conducting pressure is formed in the circumferential direction of the shaft hole B, and an outer edge guide surface formed by the valve clack sleeve and the valve clack cover surface on the valve clack sleeve is matched with a main through hole in the control valve to be opened or closed.

In the above, the differential adjusting mechanism includes an adjusting piston and an adjusting screw connected to a lower end of the adjusting piston.

As mentioned above, the adjusting piston includes the piston plate, is located sleeve a on its top and is located sleeve B of its lower extreme, sleeve a top offer with activity valve stem bottom complex blind hole, be located sleeve B bottom offer with adjusting screw matching internal thread hole, adjusting screw is last to distribute have with internal thread hole matching first screw thread district and with valve bonnet 310 matching second screw thread district, and first screw thread district and second screw thread district have inequality pitch.

In the above, a sealing groove is formed in the outer circumference of the piston plate, and an O-ring seal for sealing the piston plate and the valve cover is arranged in the corresponding sealing groove.

The water guide hole is formed in one side of the water inlet of the valve body, and the lower portion of the diaphragm is communicated with the water inlet of the valve body through the water guide hole through the inner cavity of the valve cover.

The utility model relates to a rationally novel, gain following technological effect:

1. the valve core assembly of the control valve has the advantages of simple structure, small volume, easy manufacture and assembly, low cost and convenient installation;

2. the pressure difference range of the automatic pressure regulating assembly can be secondarily regulated according to the system flow, so that the adaptability of the product is improved;

3. the valve has the functions of two products of an adjustable differential pressure valve and a flow control valve, can save a large amount of steel, and reduces the cost.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to these drawings.

Fig. 1 is a schematic cross-sectional view of a flow control valve according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of a valve body according to an embodiment of the present invention;

3-4 are schematic diagrams of valve clacks of the embodiment of the invention;

fig. 5-6 are schematic structural views of a fixing support seat according to an embodiment of the present invention;

fig. 7-8 are schematic structural views of an adjusting piston according to an embodiment of the present invention.

Reference numerals:

100-flow control valve, 110-valve body, 120-water inlet, 130-mounting port A, 140-mounting port B, 150-water outlet, 160-water outlet, 170-main port, 180-water guide hole, 200-flow regulating component, 210-valve cover, 220-regulating valve rod, 230-transmission gear, 240-regulating knob, 250-regulating gear, 260-flow regulating cock, 300-automatic pressure regulating component, 310-valve cover, 320-regulating screw, 330-regulating piston, 331-piston plate, 332-sleeve A, 333-sleeve B, 334-sealing groove, 335-blind hole, 336-internal threaded hole, 340-fastener, 350-diaphragm, 360-reset spring, 370-fixed support seat, 371-support sleeve, 372-sleeve cover surface, 373-shaft hole A, 374-water guide hole B, 375-external thread area, 376-spring fixing cavity, 380-movable valve rod, 390-O type sealing ring, 3110-pressure plate, 3120-spring support, 3130-valve flap, 3131-valve flap sleeve, 3132-water guide hole A, 3133-valve flap cover surface, 3134-shaft hole B, 3135-water guide cavity, 1-fixing screw and 2-sealing gasket.

Detailed Description

In order to make those skilled in the art better understand the solution of the embodiments of the present invention, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings and the implementation manner.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are used only for convenience of describing the present application and for simplicity of description, and do not indicate or imply that the devices or elements being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application.

In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Example 1: referring to fig. 1-2, a flow control valve 100 capable of adjusting pressure difference includes a valve body 110, and a water inlet 120, a mounting port B140, a water outlet 150 and a mounting port C160 provided thereon, a main port 170 is provided in the valve body 110 to communicate the water inlet 120 and the water outlet 150, and a mounting port a 130 is provided below the main port 170 and inside the mounting port B140; a flow regulating component 200 for regulating flow is covered on the mounting port C160, and an automatic pressure regulating component 300 coaxial with the flow regulating component 200 is sealed in the corresponding mounting port A130 and the mounting port B140;

the automatic pressure regulating assembly 300 includes a valve housing 310 fitted to the mounting port B140, a diaphragm 350 clamped between the valve housing 310 and the mounting port B140 of the valve body 110, a movable stem 380 connected to the diaphragm 350, and a flap 3130 fixedly connected to the upper end of the movable stem 380 and disposed corresponding to the main port 170; a fixed support seat 370 matched with the mounting port A130 is sleeved on the movable valve rod 380 positioned between the diaphragm 350 and the valve clack 3130, and a return spring 360 is arranged between the fixed support seat 370 and a spring support 3120 arranged on the top of the diaphragm 350; a pressure plate 3110 and a fastener 340 are sleeved on the movable valve rod 380 positioned below the diaphragm 350; the lower end of the movable valve stem 380 is fitted to a differential speed adjustment mechanism slidably disposed in the valve housing 310.

Referring to fig. 1, the flow rate adjusting assembly 200 includes a valve cover 210 disposed in cooperation with the mounting opening C160, a regulating valve rod 220, a transmission gear 230 fixedly disposed at a lower end of the valve cover 210, and a flow rate adjusting cock 260, wherein the flow rate adjusting cock 260 is a cylindrical sleeve, and a gap extending to an end surface of the water inlet 120 is formed in a side wall of the flow rate adjusting cock 260 facing the water inlet 120, and is used for adjusting an opening degree of the water inlet 120 to adjust a flow rate; an adjusting knob 240 meshed with the transmission gear 230 and an adjusting gear 250 at the lower end of the adjusting knob are arranged on one side of the valve cover 210 in a penetrating manner, the adjusting gear 250 at the lower end of the adjusting knob 240 is driven to rotate by rotating the adjusting knob to further drive the transmission gear 230 to rotate, the rotation of the flow adjusting cock 260 is realized, and finally the adjustment of the flow is realized; in addition, a dial is arranged on the valve cover 210 corresponding to the adjusting knob 240, so that accurate flow control is facilitated.

Referring to fig. 1, 5 and 6, the fixed support 370 includes a support sleeve 371 and a sleeve cover 372 disposed at a top end thereof, the sleeve cover 372 is provided with a shaft hole a 373 through which the movable valve rod 380 passes, a water guide hole B374 for transmitting pressure is further formed around the shaft hole a 373, an external thread region 375 is disposed on an outer circumference of the support sleeve 371, and a spring fixing cavity 376 for defining the return spring 360 is disposed on a circumference of the shaft hole a 373 below the sleeve cover 372; the fixed support seat 370 is fixedly connected with the mounting hole a 130 through the external thread thereof, and the movable valve rod 380 can freely move up and down from the shaft hole a 373.

Referring to fig. 3 and 4, the flap 3130 includes a flap bush 3131 and a flap cover 3133 on the top thereof, a central hole B3134 formed in the flap cover 3133 and a water guide hole a3132 circumferentially disposed on the shaft hole B3134 for transmitting pressure are formed, and an outer edge guide surface formed by the flap bush 3131 and the flap cover 3133 thereon is engaged with the main opening 170 in the control valve 100 to open or close the same. The shaft hole B3134 of the flap 3130 is fixedly connected to the upper end of the movable valve rod 380 through the fastener 340 and the sealing washer 390, and the main port 170 is opened or closed as the movable valve rod 380 moves up and down.

Referring to fig. 1, 7 and 8, the differential adjusting mechanism includes an adjusting piston 330 and an adjusting screw 320 connected to a lower end thereof.

The adjusting piston 330 comprises a piston plate 331, a sleeve A332 positioned at the top end of the piston plate 331 and a sleeve B333 positioned at the lower end of the piston plate 333, the top of the sleeve A332 is provided with a blind hole 335 matched with the bottom end of the movable valve rod 380, the sleeve A332 is tightly propped against a fastener 340 at the lower end of the movable valve rod 380, and the movable valve rod 380 is pushed to lift along the axis by the adjusting piston 330; an internal threaded hole 336 matched with the adjusting screw 320 is formed in the bottom of the sleeve B333, a first threaded area matched with the internal threaded hole 336 and a second threaded area matched with the valve bonnet 310 are distributed on the adjusting screw 320, and the first threaded area and the second threaded area have different screw pitches. When the adjusting screw 320 is rotated for one turn, the screw pitches of the upper end and the lower end of the adjusting screw are not equal to each other to generate differential motion, and the adjusting piston 330 can generate displacement equal to the difference between the two screw pitches to drive the movable valve rod 380 and the element fixed on the movable valve rod 380 to generate the same displacement, so that the position of the valve core assembly can be adjusted slightly and accurately, the deformation of the spring is changed to realize new balance to enlarge the differential pressure working range of a product, and the application range of the product is wider.

Wherein, a sealing groove 334 is provided on the outer circumference of the piston plate 331, and an O-ring for sealing the piston plate 331 and the valve cover 310 is provided in the corresponding sealing groove 334.

Referring to fig. 1 and 2, a water guide hole 180 is formed at a side of the water inlet of the valve body 110, and a lower portion of the diaphragm 350 is communicated with the water inlet 120 of the valve body 110 through the water guide hole 180 via the inner cavity of the valve housing 310. This arrangement ensures that the water inlet 120 communicates with the underside of the diaphragm 350 and maintains the same liquid pressure.

The working principle is as follows:

the working principle of the flow regulating assembly is as follows: the adjusting gear 250 at the lower end of the adjusting knob 240 is driven to rotate by rotating the adjusting knob to drive the transmission gear 230 to rotate, so that the flow adjusting cock 260 is rotated, the flow area between the gap and the water inlet 120 is changed, and the flow is adjusted finally.

The working principle of the automatic pressure regulating assembly is as follows: when fluid enters the automatic pressure regulating assembly 300 from the water inlet 120 and passes through the flow regulating cock 260 and the valve flap 3130 to reach the water outlet 150, the fluid generates three different pressure zones under the action of the valve core assembly, and the pressure in the area from the water inlet 120 to the flow regulating cock 260 is the highest, namely P1; the cavity at the lower part of the diaphragm 350 is communicated with the water inlet 120 through the water guide holes of the valve body 110 and the valve cover 310, and the pressure is also P1; the pressure drop P2 occurs when the fluid flows through the main port 170, the flow control cock 260, the water guide hole a3132 of the flap 3130, and the water guide hole B374 of the fixed support seat to the area above the diaphragm 350; the area passing the flap 3130 to the outlet 150 has the lowest pressure, P3; when the system pressure rises, P1 increases, the force acting below the diaphragm 350 is greater than the resultant force of the force acting above the diaphragm of P2 and the elastic force of the return spring 360, the diaphragm 350 drives the movable valve stem 380 and the flap 3130 to move upward, the distance between the flap 3130 and the main port 170 decreases, and therefore the area of the water outlet decreases, the fluid pressure gradually increases until a new equilibrium occurs, the flow rate is maintained unchanged, and vice versa, and the purpose of automatic flow rate regulation is achieved.

The working principle of the differential adjusting mechanism is as follows: through the thread areas with different thread pitches distributed on the adjusting screw 320, the thread pitches on the upper end and the lower end of the adjusting screw are different to generate differential motion, so that the adjusting piston 330 is driven to generate displacement equal to the difference of the two thread pitches, and the movable valve rod 380 and the element fixed on the movable valve rod 380 are driven to generate the same displacement; in the process, the return spring 360 is pressed along with the ascending of the adjusting piston 330, the pressure difference required by the deformation of the diaphragm 350 is increased, and the system sensitivity is reduced; when the adjusting screw 320 drives the adjusting piston 330 to move downwards, the return spring 360 is released, the pressure difference required by the deformation of the diaphragm 350 is reduced, the system sensitivity is increased, and the pressure difference adjustment is sensitive. While the preferred embodiments of the present invention have been described in the foregoing illustrative manner, it will be understood by those skilled in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the present invention.

Claims (8)

1. A flow control valve capable of regulating differential pressure, comprising: the flow control valve (100) comprises a valve body (110), a water inlet (120), a mounting port B (140), a water outlet (150) and a mounting port C (160), wherein the water inlet (120), the mounting port B (140), the water outlet (150) and the mounting port C (160) are arranged on the valve body (110), a main through port (170) which is used for communicating the water inlet (120) with the water outlet (150) is arranged in the valve body (110), and a mounting port A (130) is arranged on the inner side of the mounting port B (140; a flow regulating component (200) for regulating flow is covered on the mounting port C (160), and an automatic pressure regulating component (300) coaxial with the flow regulating component (200) is sealed in the corresponding mounting port A (130) and the mounting port B (140);

the automatic pressure regulating assembly (300) comprises a valve cover (310) matched with the mounting port B (140), a diaphragm (350) clamped between the valve cover (310) and the mounting port B (140) of the valve body (110), a movable valve rod (380) connected with the diaphragm (350) and a valve flap (3130) fixedly connected to the upper end of the movable valve rod (380) and arranged corresponding to the main port (170); a fixed support seat (370) matched with the mounting port A (130) is sleeved on the movable valve rod (380) positioned between the diaphragm (350) and the valve clack (3130), and a return spring (360) is arranged between the fixed support seat (370) and a spring support seat (3120) arranged at the top of the diaphragm (350); a pressure plate (3110) and a fastener (340) are sleeved on the movable valve rod (380) positioned below the diaphragm (350); the lower end of the movable valve rod (380) is sleeved on a differential adjusting mechanism which is arranged on the valve cover (310) in a sliding way.

2. A differential pressure adjustable flow control valve as defined in claim 1 wherein: the flow adjusting assembly (200) comprises a valve cover (210) matched with the mounting hole C (160), an adjusting valve rod (220) and a transmission gear (230) and a flow adjusting cock (260) which are fixedly arranged at the lower end of the valve cover (210) are arranged in the center of the valve cover in a penetrating mode, and an adjusting knob (240) meshed with the transmission gear (230) and an adjusting gear (250) at the lower end of the adjusting knob are arranged on one side of the valve cover (210) in a penetrating mode.

3. A differential pressure adjustable flow control valve as defined in claim 1 wherein: fixed supporting seat (370) including sleeve mat coat (372) that support sleeve (371) and its top set up, sleeve mat coat (372) set up shaft hole A (373) that are used for making movable valve rod (380) pass, shaft hole A (373) around still set up water guide hole B (374) that are used for transmitting pressure, be located support sleeve (371) outer circumference and be provided with external screw thread district (375), be located sleeve mat coat (372) below be provided with spring fixed chamber (376) that are used for injecing reset spring (360) on shaft hole A (373) circumference.

4. A differential pressure adjustable flow control valve as defined in claim 1 wherein: the valve clack (3130) comprises a valve clack sleeve (3131) and a valve clack cover surface (3133) at the top end of the valve clack sleeve, a shaft hole B (3134) and a water guide hole A (3132) for conducting pressure are formed in the center of the valve clack cover surface (3133) in the circumferential direction of the shaft hole B (3134), and an outer edge guide surface formed by the valve clack sleeve (3131) and the valve clack cover surface (3133) on the valve clack sleeve is matched with a main through hole (170) in the control valve (100) to be opened or closed.

5. A differential pressure adjustable flow control valve as defined in claim 1 wherein: the differential adjusting mechanism comprises an adjusting piston (330) and an adjusting screw (320) connected with the lower end of the adjusting piston.

6. A differential pressure adjustable flow control valve as defined in claim 5 wherein: adjusting piston (330) include piston board (331), be located sleeve A (332) on its top and be located sleeve B (333) of its lower extreme, sleeve A (332) top seted up with movable valve rod (380) bottom complex blind hole (335), be located sleeve B (333) bottom and set up internal thread hole (336) that match with adjusting screw (320), it has the first screw thread district that matches with internal thread hole (336) and the second screw thread district that matches with valve bonnet (310) to distribute on adjusting screw (320), and first screw thread district and second screw thread district have inequality pitch.

7. A differential pressure adjustable flow control valve as defined in claim 6 wherein: the outer circumference of the piston plate (331) is provided with a sealing groove (334), and an O-shaped sealing ring for sealing the piston plate (331) and the valve cover (310) is arranged in the corresponding sealing groove (334).

8. A differential pressure adjustable flow control valve as defined in claim 1 wherein: a water guide hole (180) is formed in one side of the water inlet of the valve body (110), and the lower portion of the diaphragm (350) is communicated with the water inlet (120) of the valve body (110) through the water guide hole (180) through the inner cavity of the valve cover (310).

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