Push type switch valve element and fluid switch device

Abstract

The utility model discloses a push-type switch valve core and a fluid switch device, comprising: a housing, the side wall of which is provided with a liquid inlet and the front end of which is provided with a liquid outlet; the piston is arranged in the shell in a front-back axial movement mode, and the rear end of the piston and the inner wall of the shell form a pressure inner cavity; a pressure hole is formed in the rear end of the piston, the other end of the pressure hole communicates with the liquid inlet, and the piston is provided with a through cavity penetrating front and back; the push rod is arranged in the through cavity in a front-back axial movement mode, the push rod is provided with a first baffle, and a return spring is arranged between the first baffle and the inner wall of the rear end of the shell; a plurality of channels are circumferentially distributed in the front of the first baffle of the push rod; by optimizing the structural design of the piston, the push rod and the return spring, higher sealing performance, more stable opening and closing processes and a more reliable reset mechanism are achieved, the structure is compact, the occupied space is small, operation is easy, convenient and rapid, and the valve is suitable for various occasions needing fluid control.

Description

Technical Field

[0001] The utility model relates to the technical field of switching valves, and particularly relates to a push-button type switching valve core and a fluid switching device. Background Technique

[0002] In the field of fluid control, as a key component, the switching valve is widely used in various industrial, construction and civil systems for precisely controlling the flow of fluids. The traditional design of the switching valve often has problems such as complex structure, inconvenient operation, large occupied space, and poor sealing performance, making it difficult to meet the requirements of modern fluid control equipment for high efficiency, reliability and compactness.

[0003] In recent years, with the continuous progress of material science and mechanical design, the design of the switching valve has also developed towards a more intelligent, modular and efficient direction. As a fluid control device, the push-button type switching valve has gradually gained market favor due to its advantages such as simple operation, compact structure and good sealing performance.

[0004] However, there are still certain limitations in the design of the existing push-button type switching valve core, such as unstable sealing performance, easy generation of pressure shock during the opening and closing processes, and insufficient reliability of the reset mechanism. These problems not only affect the service life and safety of the switching valve core, but also limit its application in a wider range of fields. Content of the Utility Model

[0005] The purpose of the utility model is to address the problems existing in the prior art by providing a push-button type switching valve core and a fluid switching device. Through the optimization of the design of the piston, push rod and return spring, higher sealing performance, more stable opening and closing processes and a more reliable reset mechanism are achieved. The push-button type switching valve core is not only compact in structure and small in occupied space, but also simple and fast in operation, and is suitable for various occasions requiring fluid control.

[0006] To achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A pressing type switch valve core, comprising: a housing, the side wall of which is provided with a liquid inlet, and the front end is provided with a liquid outlet; a piston, axially movable back and forth in the housing, the back end of the piston and the inner wall of the housing form a pressure inner cavity; a pressure hole connected to the pressure inner cavity is provided at the back end of the piston, the other end of the pressure hole communicates with the liquid inlet, and a through cavity penetrating back and forth is provided at the central axis of the piston; when the piston is in the first position, the front end of the piston is hermetically connected to the liquid outlet, and when the piston is in the second position, the liquid inlet communicates with the liquid outlet; a push rod, axially movable back and forth in the through cavity, the push rod is provided with a first baffle, and a return spring is provided between the first baffle and the inner wall of the back end of the housing, for hermetically abutting the first baffle against the step in the through cavity and making the front end of the push rod extend out of the piston; a plurality of grooves are circumferentially distributed in front of the first baffle of the push rod.

[0008] A first sealing ring is provided in front of the first baffle of the push rod, and the first baffle and the step in the through cavity are hermetically abutted through the first sealing ring.

[0009] A sleeve is provided at the back side of the first baffle, a plurality of opening grooves are circumferentially distributed on the side wall of the sleeve, a convex seat is provided on the inner wall of the back end of the housing, one end of the return spring is sleeved outside the sleeve, and the other end is sleeved outside the back end of the convex seat; when the piston is in the second position, the front end of the convex seat is inserted into the sleeve, and the return spring is in a compressed state.

[0010] An annular cavity is provided on the circumferential side of the piston, when the piston is in the first position and the second position, the annular cavity communicates with the liquid inlet, the pressure hole extends axially and is connected to the annular cavity, the back end of the return spring extends out a diversion wire, and the other end of the diversion wire axially penetrates the pressure hole.

[0011] A connecting column is provided in the middle of the front end of the piston, an annular sealing gasket is provided on the circumferential side of the connecting column, the connecting column is threadedly connected with a gland, and the sealing gasket is fixed to the piston through the gland; when the piston is in the first position, the circumferential side edge of the sealing gasket is hermetically abutted against the liquid outlet.

[0012] The front end of the housing is detachably connected with an annular cover, and the inner hole of the annular cover is the liquid outlet; when the piston is in the first position, the circumferential side edge of the sealing gasket is hermetically abutted against the back end face of the annular cover.

[0013] A ring groove is provided on the back side wall of the piston, a second sealing ring is clamped in the ring groove, and the back side wall of the piston is hermetically connected to the inner side wall of the housing through the second sealing ring.

[0014] A fluid switch device includes the above-mentioned switch valve core; it further includes:

[0015] An inlet liquid pipeline, which is hermetically connected to the inlet;

[0016] An outlet liquid pipeline, which is hermetically connected to the outlet;

[0017] A switch driving mechanism, which drives the push rod and the piston to axially displace backward.

[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0019] Through the synergistic effect of the push rod and the return spring, as well as the design of the channel, the pressure balance between the pressure inner cavity and the inlet is achieved, avoiding the excessive impact caused by sudden pressure changes, and ensuring the stable operation of the switch valve core;

[0020] The design of the sleeve and the convex seat provides accurate positioning and guiding functions for the return spring, increases the stability of the return spring in the compressed state, and improves the reliability of the piston reset;

[0021] The design of the connecting column and the gland facilitates the disassembly and replacement of the gasket, preventing leakage and performance degradation; the detachable design of the housing and the ring cover also facilitates the installation and disassembly of the piston, simplifying the maintenance process. Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 It is the overall structure diagram of the switch valve core in an embodiment of the present application;

[0024] Figure 2 It is the structural split diagram of the switch valve core in an embodiment of the present application;

[0025] Figure 3 It is the structure diagram of the piston in an embodiment of the present application;

[0026] Figure 4 It is the structure diagram of the push rod in an embodiment of the present application;

[0027] Figure 5 It is the cross-sectional schematic diagram of the fluid switch device in an embodiment of the present application;

[0028] In the figure: 1. housing; 101. liquid inlet; 102. liquid outlet; 2. piston; 201. pressure hole; 202. annular cavity; 203. connecting column; 3. push rod; 301. first baffle; 302. channel; 4. return spring; 401. diversion wire; 5. first sealing ring; 6. sleeve; 7. convex seat; 8. gasket; 9. gland; 10. ring cover; 11. second sealing ring; 12. liquid inlet pipe; 13. liquid outlet pipe. Detailed implementation manners

[0029] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0030] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this utility model is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0031] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0032] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0033] Such as Figures 1 to 5As shown in the figure, a push-button switch valve core includes: a housing 1, with a liquid inlet 101 provided on its side wall and a liquid outlet 102 provided at its front end; a piston 2, axially movable forward and backward in the housing 1, and the rear end of the piston 2 and the inner wall of the housing 1 form a pressure inner cavity; a pressure hole 201 connected to the pressure inner cavity is provided at the rear end of the piston 2, and the other end of the pressure hole 201 communicates with the liquid inlet 101, and a through cavity penetrating forward and backward is provided at the central axis of the piston 2; when the piston 2 is in the first position, the front end of the piston 2 is hermetically connected to the liquid outlet 102, and when the piston 2 is in the second position, the liquid inlet 101 communicates with the liquid outlet 102; a push rod 3, axially movable forward and backward in the through cavity, the push rod 3 is provided with a first baffle 301, and a return spring 4 is provided between the first baffle 301 and the rear inner wall of the housing 1, for hermetically abutting the first baffle 301 against the step in the through cavity and making the front end of the push rod 3 extend out of the piston 2; a plurality of channels 302 are circumferentially distributed in front of the first baffle 301 of the push rod 3.

[0034] Specifically, when the push rod 3 is not subjected to an external driving force, it is under the thrust of the return spring 4 and hermetically abuts against the step in the through cavity; this makes the piston 2 in the first position, thereby sealing the liquid outlet 102 and blocking the liquid medium from flowing from the liquid inlet 101 to the liquid outlet 102, forming a closed circuit; in this state, the front end of the push rod 3 extends out of the piston 2 for the pushing of an external driving mechanism.

[0035] When the push rod 3 is pushed by the driving mechanism, it compresses the return spring 4 and axially displaces backward; this makes the first baffle 301 no longer in sealed contact with the step in the through cavity; when the front end of the push rod 3 is displaced to be flush with the piston 2, the driving mechanism continues to push the piston 2 to axially displace backward together, and when the piston 2 is displaced to the second position, it no longer seals the liquid outlet 102, and the liquid inlet 101 communicates with the liquid outlet 102, forming an open circuit.

[0036] During the formation of the open circuit, when the piston 2 starts to axially displace backward, the liquid in the pressure inner cavity is squeezed into the through cavity, and these liquids flow out through the channels 302 and then communicate with the liquid inlet 101. This design effectively realizes the pressure balance between the pressure inner cavity and the liquid inlet, thereby avoiding excessive impact caused by pressure mutation, ensuring the stable operation of the switch valve core, and extending its service life.

[0037] When the driving mechanism retracts, the return spring 4 resets; the push rod 3 is displaced forward under the elastic force, and is in sealed contact with the step in the through cavity again; at the same time, the push rod 3 drives the piston 2 to displace, and at this time, the liquid at the liquid inlet 101 flows into the pressure inner cavity through the pressure hole 201 to balance the pressure. When the piston 2 is displaced to the first position to seal the liquid outlet 102 again, a normally closed circuit is formed.

[0038] The design of this push - type switch valve core is compact and occupies little space, making it suitable for various occasions requiring fluid control. By the action of an external driving mechanism on the push rod 3, its axial displacement back and forth can easily achieve the opening and closing of the switch valve core, with simple and quick operation.

[0039] This push - type switch valve core has higher adaptability and can be applied to various fluid control devices, and is used in conjunction with automatic or manual switch driving mechanisms to achieve a wider range of applications and lower costs.

[0040] In some embodiments, a first sealing ring 5 is provided in front of the first baffle 301 of the push rod 3, and the first baffle 301 and the step in the through - cavity are in sealing contact through the first sealing ring 5. The design of the first sealing ring 5 significantly enhances the sealing performance between the push rod 3 and the through - cavity step, effectively preventing liquid leakage and improving the reliability and safety of the switch valve core.

[0041] In some embodiments, a sleeve 6 is provided on the rear side of the first baffle 301. A number of opening grooves are circumferentially distributed on the side wall of the sleeve 6. A convex seat 7 is provided on the inner wall of the rear end of the housing 1. One end of the return spring 4 is sleeved outside the sleeve 6, and the other end is sleeved outside the rear end of the convex seat 7; when the piston 2 is in the second position, the front end of the convex seat 7 is inserted into the sleeve 6, and the return spring 4 is in a compressed state. The design of the sleeve 6 and the convex seat 7 provides accurate positioning and guiding for the return spring 4. Through the design of the convex seat 7 inserted into the sleeve 6, the stability of the return spring 4 in the compressed state is increased, and the reliability of the piston 2 to reset is improved; the design of the opening grooves provides necessary flow space for the liquid in the sleeve, effectively avoiding the problem of pressure transient caused by the extrusion of the liquid in the sleeve when the convex seat 7 is inserted into the sleeve 6, thereby extending its service life and reducing maintenance and replacement costs.

[0042] In some embodiments, an annular cavity 202 is provided on the circumferential side of the piston 2. When the piston 2 is in the first position and the second position, the annular cavity 202 is in communication with the liquid inlet 101. The pressure hole 201 extends axially and is connected to the annular cavity 202. The rear end of the return spring 4 extends out a diversion wire 401, and the other end of the diversion wire 401 axially penetrates the pressure hole 201. The design of the annular cavity 202 enables the medium to act evenly on the circumferential side of the piston. The pressure hole 201 extends axially and is connected to the annular cavity 202 to ensure that the medium can flow smoothly when the piston is in the open state, reducing the flow resistance. The diversion wire 401 plays a role in guiding the liquid flow.

[0043] In some embodiments, a connecting post 203 is provided in the middle of the front end of the piston 2. An annular gasket 8 is provided on the circumferential side of the connecting post 203. The connecting post 203 is threadedly connected to a gland 9, and the gasket 8 is fixed to the piston 2 through the gland 9. When the piston 2 is in the first position, the circumferential edge of the gasket 8 is in sealing contact with the liquid outlet 102. The tight contact between the gasket 8 and the liquid outlet 102 provides a better sealing effect. The design of the connecting post 203 and the gland 9 facilitates the disassembly and replacement of the gasket 8, preventing leakage and performance degradation.

[0044] In some embodiments, a ring cover 10 is detachably connected to the front end of the housing 1. The inner hole of the ring cover 10 is the liquid outlet 102. When the piston 2 is in the first position, the circumferential edge of the gasket 8 is in sealing contact with the rear end face of the ring cover 10. The detachable design of the ring cover 10 and the housing 1 facilitates the installation and disassembly of the piston, simplifying the maintenance process of the piston 2. The circumferential edge contact and sealing design between the piston 2 and the gasket 8 provide a better sealing effect, reducing the risk of leakage.

[0045] In some embodiments, a ring groove is provided on the rear side wall of the piston 2, and a second sealing ring 11 is clamped in the ring groove. The rear side wall of the piston 2 is hermetically connected to the inner side wall of the housing 1 through the second sealing ring 11. The design of the second sealing ring 11 provides a stable sealing layer, ensuring the sealing performance between the piston 2 and the housing 1.

[0046] In summary, through the optimization of the design of the piston, the push rod, and the return spring, the present application achieves higher sealing performance, a more stable opening and closing process, and a more reliable reset mechanism. This push-button switch valve core is not only structurally compact, occupies a small space, but also is simple and fast to operate, and is suitable for various occasions requiring fluid control.

[0047] In the second aspect of the present application, a fluid switch device is provided, including the above-mentioned switch valve core; and further including: a liquid inlet pipe 12, hermetically connected to the liquid inlet 101; a liquid outlet pipe 13, hermetically connected to the liquid outlet 102; and a switch driving mechanism for driving the push rod 3 and the piston 2 to axially displace backward.

[0048] This switch device is applicable to various liquid media, such as water, oil, gas, etc., and has a wide range of application prospects.

[0049] Although the 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 variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A push-button switch valve core, characterized in that, Comprising: A housing (1) with a liquid inlet (101) provided on its side wall and a liquid outlet (102) provided at its front end; A piston (2) axially movable forward and backward in the housing (1), the rear end of the piston (2) and the inner wall of the housing (1) forming a pressure inner cavity; a pressure hole (201) connected to the pressure inner cavity is provided at the rear end of the piston (2), the other end of the pressure hole (201) communicates with the liquid inlet (101), and a through cavity penetrating forward and backward is provided at the central axis of the piston (2); when the piston (2) is in the first position, the front end of the piston (2) is sealingly connected to the liquid outlet (102), and when the piston (2) is in the second position, the liquid inlet (101) communicates with the liquid outlet (102); A push rod (3) axially movable forward and backward in the through cavity, the push rod (3) is provided with a first baffle (301), a return spring (4) is provided between the first baffle (301) and the rear inner wall of the housing (1) to make the first baffle (301) sealingly abut against the step in the through cavity and make the front end of the push rod (3) extend out of the piston (2); a plurality of channels (302) are circumferentially distributed in front of the first baffle (301) of the push rod (3).

2. The push-button switch valve core according to claim 1, characterized in that, A first sealing ring (5) is provided in front of the first baffle (301) of the push rod (3), and the first baffle (301) and the step in the through cavity are sealingly abutted through the first sealing ring (5).

3. The push-button switch spool according to claim 1, characterized in that, A sleeve (6) is provided at the rear side of the first baffle (301), a plurality of opening grooves are circumferentially distributed on the side wall of the sleeve (6), a convex seat (7) is provided on the rear inner wall of the housing (1), one end of the return spring (4) is sleeved outside the sleeve (6), and the other end is sleeved outside the rear end of the convex seat (7); when the piston (2) is in the second position, the front end of the convex seat (7) is inserted into the sleeve (6), and the return spring (4) is in a compressed state.

4. The push-button switch spool according to claim 1, characterized in that An annular cavity (202) is provided on the peripheral side of the piston (2), when the piston (2) is in the first position and the second position, the annular cavity (202) communicates with the liquid inlet (101), the pressure hole (201) extends axially and is connected to the annular cavity (202), the rear end of the return spring (4) extends out a diversion wire (401), and the other end of the diversion wire (401) axially penetrates the pressure hole (201).

5. A push-button switch valve core according to claim 1, characterized in that, A connecting column (203) is provided in the middle of the front end of the piston (2), an annular sealing gasket (8) is provided on the peripheral side of the connecting column (203), the connecting column (203) is threadedly connected with a gland (9), and the sealing gasket (8) is fixed to the piston (2) through the gland (9); when the piston (2) is in the first position, the peripheral edge of the sealing gasket (8) is sealingly abutted against the liquid outlet (102).

6. The push-button switch valve core according to claim 5, characterized in that The front end of the housing (1) is detachably connected with an annular cover (10), and the inner hole of the annular cover (10) is the liquid outlet (102); when the piston (2) is in the first position, the circumferential edge of the gasket (8) is in sealing contact with the rear end face of the annular cover (10).

7. The push-button switch spool according to claim 1, characterized in that A ring groove is provided on the rear side wall of the piston (2), and a second sealing ring (11) is clamped in the ring groove. The rear side wall of the piston (2) is hermetically connected with the inner side wall of the housing (1) through the second sealing ring (11).

8. A fluid switching device, characterized in that, It includes the switching valve core according to any one of claims 1 to 7; further includes: A liquid inlet pipe (12), which is hermetically connected to the liquid inlet (101); A liquid outlet pipe (13), which is hermetically connected to the liquid outlet (102); A switch driving mechanism, which drives the push rod (3) and the piston (2) to axially displace backward.

Images