CN213744930U

CN213744930U - Self-operated piston valve

Info

Publication number: CN213744930U
Application number: CN202022305988.6U
Authority: CN
Inventors: 朱铁强; 邱荣水; 黄海嵩
Original assignee: Hunan Pump Valve Manufactory Co ltd
Current assignee: Hunan Pump Valve Manufactory Co ltd
Priority date: 2020-10-15
Filing date: 2020-10-15
Publication date: 2021-07-20
Anticipated expiration: 2030-10-15

Abstract

The utility model discloses a formula of relying on oneself piston valve, include: the valve body is provided with an inlet end and an outlet end, and the inlet end is provided with a flow guide body; the end surface of the piston body, which is close to the inlet end, is used for being matched with the flow guide body to close the valve; a spring is arranged between the end surface of the outlet end of the piston body and the valve body; the spring is used for pushing the piston body to move towards the guide body; the end surfaces of the valve body and the piston body close to the outlet end form a pressure cavity; the pressure chamber is communicated with the inlet end through a communicating hole arranged on the piston body, and the valve body is provided with an outer connecting hole extending to the pressure chamber. The utility model discloses a self-operated piston valve to medium pressure is drive power in the valve body, through with communicating outer contact hole of pressure chamber and intercommunicating pore control pressure chamber internal pressure, thereby the axial displacement is made in the valve body to the drive piston body, realizes opening and close of valve. The structure is simple and light, the maintenance is simple, and the configuration mode of the outer connecting hole can be flexibly selected.

Description

Self-operated piston valve

Technical Field

The utility model relates to a hydraulic control valve especially relates to a formula of relying on oneself piston valve.

Background

At present, a hydraulic control valve adopts pipeline medium pressure as power to realize opening, closing and adjustment of the valve, has two types of diaphragm type and piston type, has the same working principle, and utilizes upstream and downstream pressure difference as power to enable a diaphragm or a piston to realize the opening, closing or adjusting state of a valve clack according to the differential principle in hydraulic pressure. The main valve body is in a Y-shaped or T-shaped cut-off type, and the valve is complex in structure, large in size and not beneficial to miniaturization and convenient application. Due to the tortuous flow passage, the adjusting performance is poor, and the device is particularly not suitable for the working condition of high pressure difference.

Meanwhile, the piston valve (also called a flow regulating pressure regulating valve) which is widely applied at present has good flow and pressure regulating performance due to the characteristics of a unique annular channel, a balanced type valve core and the like, avoids the problems of poor regulating performance of a butterfly valve, a gate valve and the like and cavitation, noise and the like which can be caused by the poor regulating performance, and is particularly applicable to high-pressure-difference working conditions and widely applied to flow control and pressure regulation of a pipe network. However, the existing piston valves are driven by external force, for example, in chinese patents 201610256810.2 and 201420239851.7, the opening and closing members are driven by a crank-link mechanism, the valve is opened and closed by moving axially forward and backward, the crank is driven by a valve shaft driven by external force, and the existing conventional power is an electric device, so that the application condition and the later operation and maintenance of the product are greatly limited and troublesome.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a formula of relying on oneself piston valve has small, light in weight, and the structure is retrencied, makes things convenient for later maintenance, and can control the advantage with the help of medium pressure to the valve.

According to the utility model discloses a formula of relying on oneself piston valve of first aspect embodiment includes: the valve body is provided with an inlet end and an outlet end, and the inlet end is provided with a flow guide body; the end surface of the piston body, which is close to the inlet end, is used for being matched with the flow guide body to realize the partition of the inlet end and the outlet end; a spring is arranged between the end face of the outlet end of the piston body and the valve body and is used for pushing the piston body to move towards the flow guide body; the end surfaces of the valve body and the piston body close to the outlet end form a pressure cavity; the pressure cavity is communicated with the inlet end through a communicating hole formed in the piston body, and the valve body is provided with an outer connecting hole extending to the pressure cavity.

According to the utility model discloses self-operated piston valve has following technological effect at least: the medium pressure in the valve body is used as driving force, the pressure in the pressure cavity is controlled through the outer connecting hole and the communicating hole, and therefore the piston body is driven to overcome the spring pressure to move axially in the valve body, and the valve is opened and closed. The high-voltage electric driving device is not needed, the structure is simplified and light, the subsequent maintenance is convenient, and the configuration mode of the external connection hole can be flexibly selected according to the functional requirements, the actual installation and application conditions, the control precision requirements and the like. For example, the external connection hole is connected by adopting modes of an electromagnetic valve, a mechanical pilot valve, a manual ball valve and the like, so that the functions of electric control, pressure relief, flow regulation, water level control, cut-off and the like are realized.

According to some embodiments of the invention, the valve body comprises a main valve body and a secondary valve body; the main valve body is detachably connected with the auxiliary valve body.

According to some embodiments of the invention, the piston body comprises a first cylindrical section and a second cylindrical section, the first cylindrical section having a larger diameter than the second cylindrical section, and the first cylindrical section and the second cylindrical section are coaxially connected and the first cylindrical section is close to the outlet end with respect to the second cylindrical section; the outer circle of the first cylindrical section and the outer circle of the second cylindrical section are in sealing fit with the main valve body and can move along the main valve body, and the inner circle of the piston body is in sealing fit with the auxiliary valve body.

According to the utility model discloses a some embodiments, the valve body first cylinder section be close to the terminal surface of entrance point with the excircle of second cylinder section constitutes the air chamber, be equipped with on the valve body and extend to from the outer wall the air vent of air chamber.

According to some embodiments of the present invention, the first sealing ring is installed at a position where the baffle body contacts with the piston body.

According to some embodiments of the present invention, the first seal ring is fixed to the flow guiding body by a seal pressing plate.

According to some embodiments of the present invention, a guide cylinder is installed on a side of the guide body near the outlet end; the axis of the guide shell is parallel to the moving direction of the piston body, and the guide shell is provided with a plurality of overflowing holes penetrating through the peripheral wall of the guide shell.

According to some embodiments of the utility model, the piston body corresponds the spring and is equipped with the second recess that supplies its one end embedding, the valve body corresponds the spring and is equipped with the first recess that supplies its other end embedding.

According to some embodiments of the invention, the flow conductor is fixed by a support bar in the inlet end center.

According to some embodiments of the present invention, the end surface of the piston body near the outlet end is provided with a third groove corresponding to the outer connecting hole.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic structural view of a valve according to an embodiment of the present invention when the valve is closed;

fig. 2 is a schematic structural view of the valve according to the embodiment of the present invention when the valve is opened;

FIG. 3 is a schematic view of an embodiment of the present invention illustrating the installation of a draft tube;

FIG. 4 is a schematic view of a kidney-shaped groove draft tube according to an embodiment of the present invention;

FIG. 5 is a schematic view of a V-shaped opening draft tube according to an embodiment of the present invention;

fig. 6 is a schematic view of a nozzle guide cylinder according to an embodiment of the present invention.

Reference numerals:

the auxiliary valve body 100, the outer connection hole 110, the spring 120, the first groove 130, the outlet end 140, the sealing section 150 and the valve body 111;

the main valve body 200, the support rib 210, the flow guiding body 220, the first sealing ring 230, the sealing pressing plate 240, the flow guiding cylinder 250, the overflowing hole 260, the sealing pressing block 270, the vent hole 280 and the inlet end 290;

the piston body 300, the communication hole 310, the first cylindrical section 320, the second cylindrical section 330, the third groove 340 and the second groove 350;

pressure chamber 400, air chamber 410.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 and 2, a self-operated piston valve according to an embodiment of the present invention includes a valve body 111 having an inlet end 290 and an outlet end 140, and a piston body 300 is installed in the valve body 111.

The inlet end 290 is provided with a guide body 220, an axial center line of the guide body 220 coincides with an axial center line of the valve body 111, and a spring 120 is installed between an end surface of the piston body 300 close to the outlet end 140 and the valve body 111. Spring 120 urges piston body 300 toward flow conductor 220 to prevent stagnation and assist in sealing of the valve in the event of valve closure. When piston body 300 moves toward outlet end 140 and separates from baffle 220, the valve is in an open conducting state, and the fluid medium is shunted by baffle 220, passes through the channel between piston body 300 and baffle 220, and flows out of outlet end 140. Valve closing is achieved when the end face of piston body 300 near inlet end 290 contacts baffle 220. The end surfaces of the valve body 111 and the piston body 300 near the outlet end 140 form a pressure chamber 400, the piston body 300 is provided with a communication hole 310, the pressure chamber 400 is communicated with the inlet end 290 through the communication hole 310, and the valve body 111 is provided with a circumscribed hole 110 extending to the pressure chamber 400. The pressure of the pressure chamber 400, the elastic force of the spring 120 and the pressure of the medium at the inlet end 290 control the movement of the piston body 300, and the pressure in the pressure chamber 400 can be controlled by the open/close state of the outer connection hole 110.

The utility model provides a pair of self-operated piston valve overflows the medium and to bumping the energy dissipation in the valve body lumen, has that piston valve cavitation is little, the noise is low, the steady characteristic of operation, especially still adopts the structure of self-operated valve, utilizes the medium pressure drive piston body in the pipe network, only needs the control piston body both sides pressure differential, can control opening and close and adjust of main valve, has avoided current piston valve to need external drive, need the defect of forceful electric power operation. Meanwhile, the main valve adopts an axial flow type, and compared with the existing hydraulic valve with a Y-shaped or T-shaped cut-off structure, the size is obviously reduced, the weight is reduced, the miniaturization and the convenience of the valve are realized, the caliber limit of the valve can be broken through, and a large-caliber product is developed.

In some embodiments of the present invention, the valve body 111 includes a main valve body 200 and an auxiliary valve body 100; the main valve body 200 and the sub valve body 100 are detachably connected, such as by a flange, a screw connection, etc., so as to facilitate manufacture and maintenance.

In some embodiments of the present invention, the piston body 300 includes a first cylindrical section 320 and a second cylindrical section 330, the first cylindrical section 320 has a larger diameter than the second cylindrical section 330, the first cylindrical section 320 and the second cylindrical section 330 are coaxially connected, and the first cylindrical section 320 is close to the outlet end 140 relative to the second cylindrical section 330; the outer circumference of the first cylindrical section 320 sealingly engages and is movable along the main valve body 200, and the outer circumference of the second cylindrical section 330 sealingly engages and is movable along the main valve body 200. The auxiliary valve body 100 has a sealing section 150 extending toward the inlet end 290, and the inner circle of the piston body 300 is in sealing fit with the sealing section 150 and can move along the same, and the sealing fit is in the form of a sealing ring, so that the piston body 300 can slide smoothly and the leakage of a medium can be prevented.

In some embodiments of the present invention, the end surface of the valve body 111 and the first cylindrical section 320 close to the inlet end 290 and the outer circle of the second cylindrical section 330 form an air chamber 410, the valve body 111 is provided with an air hole 280 extending from the outer wall to the air chamber 410, and the air chamber 410 can maintain a pressure equal to the atmospheric pressure during the movement of the piston body 300, so as to stabilize the pressure and avoid affecting the movement of the piston body 300.

In some embodiments of the present invention, a first sealing ring 230 is installed at a position where the guide body 220 contacts the piston body 300, so that the inlet end 290 and the outlet end 140 can be completely isolated at the time of closing the valve.

In some embodiments of the present invention, the first sealing ring 230 is fixed on the flow guiding body 220 by the sealing pressing plate 240, so as to prevent the first sealing ring 230 from being flushed down by water flow.

As shown in fig. 3, 4, 5, and 6, in some embodiments of the present invention, a guide cylinder 250 is installed on a side of the guide body 220 near the outlet end 140; the axis of the guide cylinder 250 is parallel to the moving direction of the piston 300, the guide cylinder 250 is provided with a sealing pressing block 270 at a position close to the guide body 220, and the sealing pressing block 270 is connected to the guide body 220 through a screw for fixing the first sealing ring 230. The guide shell 250 is formed with a plurality of flow holes 260 penetrating through the peripheral wall thereof. Flow holes 260 may take the form of, but are not limited to, V-shaped holes, kidney-shaped slots, and spray holes, depending on the pressure differential. In the case of overlarge pressure difference between the inlet end 290 and the outlet end 140, the medium realizes pressure relief and energy dissipation through the overflowing hole 260 on the guide cylinder 250 and can eliminate the water hammer phenomenon in the opening and closing processes of the valve.

In some embodiments of the present invention, the piston body 300 is provided with a first groove 130 for one end of the spring 120 to be inserted into, and the valve body 111 is provided with a second groove 350 for the other end of the spring 120 to be inserted into, and the grooves are used for fixing the position of the spring 120.

In some embodiments of the present invention, the flow guiding body 220 is fixed at the center of the inlet end 290 by the supporting rib 210, and the flow guiding body 220 can prevent the medium from directly washing the valve body 111 and the piston body 300, thereby reducing the wear of the flow passage component. The baffle 220 is a hollow cone protruding toward the inlet end 290, and the flow dividing medium with this special shape can reduce the valve overflow loss.

In some embodiments of the present invention, a third groove 340 corresponding to the outer connection hole 110 is formed on the end surface of the piston body 300 near the outlet end 140, and the outer connection hole 110 is communicated with the pressure chamber 400 through the third groove 340 when the piston body 300 moves to near the outlet end 140.

The working principle of the self-operated piston valve as the regulating valve is as follows: as shown in FIG. 2, the outer diameter D2 and the inner diameter D3 at the small cross-section end of the piston body 300 form an annular area A1, the outer diameter D1 and the inner diameter D3 at the large cross-section end of the piston body 300 form an annular area A2, and the spring 120 has a spring force F. The inlet end 290 has a pressure P1, and the pressure chamber 400 is connected to the valve outlet end 140 or the outside through the external connection hole 110, and is controlled by the components on the connection line to form a pressure P2.

When P1 XA 1 > P2 XA 2+ F, the piston body 300 moves leftward until fully opened;

when P1 XA 1 < P2 XA 2+ F, piston body 300 moves rightward until full closure;

when P1 xa 1 is P2 xa 2+ F, piston body 300 is in a balanced left-right adjustment state.

The self-operated piston valve adopting the technical scheme can control various methods of P2 pressure by controlling the pressure of P2 and driving the opening, closing and adjustment of the valve through water power, for example, the functions of electric control, flow regulation, water level control and the like are realized by adopting modes of an electromagnetic valve, a mechanical pilot valve, a manual ball valve and the like, and the configuration mode of a control end can be flexibly selected according to functional requirements, actual installation and application conditions, control precision requirements and the like.

The working principle of the self-operated piston valve as a shut-off valve is as follows: the flow area of the communication hole 310 is smaller than that of the outer connection hole 110. When the external connection hole 110 is in a closed state, the pressure chamber 400 is connected to the inlet end 290 through the communication hole 310, so that the pressure of the pressure chamber 400 is equal to that of the inlet end 290, i.e., P2 is P1, and when P2 × A2+ F > P1 × A1, the valve is closed. When the external connection hole 110 is completely conducted, the communication hole 310 will be insufficiently supplemented, so that the pressure chamber 400 is depressurized, P2 < P1, and when P2 × A2+ F is smaller than P1 × A1, the valve is opened.

It is contemplated that in some embodiments, one or more external ports 110 may be provided for the purpose of providing multiple ways of controlling the pressure within the pressure chamber 400.

It will be appreciated that in some embodiments, one or more vents 280 may be provided to also maintain the air chamber 410 at atmospheric pressure to prevent interference with the movement of the piston body 300.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example" or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A self-operated piston valve, comprising:

the valve body (111), the valve body (111) is provided with an inlet end (290) and an outlet end (140), and the inlet end (290) is provided with a flow guide body (220);

a piston body (300) installed in the valve body (111), wherein an end surface of the piston body (300) close to the inlet end (290) is used for cooperating with the flow guide body (220) to realize the separation of the inlet end (290) and the outlet end (140); a spring (120) is arranged between the end surface of the piston body (300) close to the outlet end (140) and the valve body (111), and the spring (120) is used for pushing the piston body (300) to move towards the guide body (220); the end surface of the piston body (300) close to the outlet end (140) and the valve body (111) form a pressure cavity (400);

the pressure chamber (400) is communicated with the inlet end (290) through a communication hole (310) formed in the piston body (300), and the valve body (111) is provided with an external connection hole (110) extending to the pressure chamber (400).

2. A self-operated piston valve according to claim 1, wherein the valve body (111) comprises a primary valve body (200) and a secondary valve body (100); the main valve body (200) is detachably connected with the auxiliary valve body (100).

3. A self-operated piston valve according to claim 1, wherein said piston body (300) comprises a first cylindrical section (320) and a second cylindrical section (330), said first cylindrical section (320) having a larger diameter than said second cylindrical section (330), and said first cylindrical section (320) and said second cylindrical section (330) being coaxially connected and said first cylindrical section (320) being adjacent to said outlet end (140) with respect to said second cylindrical section (330); the outer circle of the first cylindrical section (320) and the outer circle of the second cylindrical section (330) are in sealing fit with the main valve body (200) and can move along the main valve body, and the inner circle of the piston body (300) is in sealing fit with the auxiliary valve body (100).

4. A self-operated piston valve according to claim 3, wherein the valve body (111), the end surface of the first cylindrical section (320) near the inlet end (290) and the outer circumference of the second cylindrical section (330) form an air chamber (410), and the valve body (111) is provided with a vent hole (280) extending from the outer wall to the air chamber (410).

5. A self-operated piston valve as claimed in claim 1, wherein a first sealing ring (230) is installed at a position where the guide body (220) contacts the piston body (300).

6. A self-operated piston valve as claimed in claim 5 wherein said first sealing ring (230) is secured to said flow conductor (220) by a sealing pressure plate (240).

7. A self-operated piston valve as claimed in claim 1, wherein a guide cylinder (250) is mounted to the side of the guide body (220) adjacent the outlet end (140); the axis of the guide cylinder (250) is parallel to the moving direction of the piston body (300), and the guide cylinder (250) is provided with a plurality of overflowing holes (260) penetrating through the peripheral wall of the guide cylinder.

8. A self-operated piston valve according to claim 1, wherein said piston body (300) is provided with a second groove (350) for one end portion thereof to be fitted into in correspondence with said spring (120), and said valve body (111) is provided with a first groove (130) for the other end portion thereof to be fitted into in correspondence with said spring (120).

9. A self-operated piston valve as claimed in claim 1 wherein said flow conductor (220) is centrally secured to said inlet end (290) by support ribs (210).

10. A self-operated piston valve as claimed in claim 1, wherein the end surface of said piston body (300) adjacent to said outlet end (140) is provided with a third recess (340) corresponding to said outer port (110).