CN217355689U

CN217355689U - Small-sized non-return pressure switch

Info

Publication number: CN217355689U
Application number: CN202221332908.9U
Authority: CN
Inventors: 张克海; 滕小翻
Original assignee: Zhejiang Kebo Electrical Appliances Co ltd
Current assignee: Zhejiang Kebo Electrical Appliances Co ltd
Priority date: 2022-05-26
Filing date: 2022-05-26
Publication date: 2022-09-02
Anticipated expiration: 2032-05-26

Abstract

The utility model belongs to water household electrical appliances pressure control field, concretely relates to small-size contrary pressure switch that ends, which comprises an outer shell, the switch module, drive assembly includes the diaphragm, the diaphragm separates the valve pocket for fluid cavity and switch module installation cavity, switch module sets up in the switch module installation cavity, be provided with in inlet channel and/or the outlet channel and be used for realizing the one-way check valve subassembly that the inlet channel switched on to outlet channel's circulation direction one-way, check valve subassembly includes the valve body, the movable rod, the back lid, a spring, the valve clack, the valve body is connected with the back lid, the movable rod is spacing can follow the axial and slide in the back lid, the valve clack links to each other with the movable rod, the spring is located the sealed cooperation of footpath face that makes valve clack and valve body inner wall between valve clack and the back lid. The utility model discloses combine check valve and pressure switch together, the check valve adopts the footpath face to seal, and is longe-lived, can more effectual let sealed face closely laminate improvement product sealing performance by a wide margin when sealed.

Description

Small-sized non-return pressure switch

Technical Field

The utility model belongs to water household electrical appliances pressure control field, concretely relates to small-size contrary pressure switch that ends.

Background

The pressure switch is suitable for pressure control systems of water appliances, is a switch for controlling the systems, belongs to an actuator, and is basically the same as the pressure switches, basic structures and working principles existing in the prior and the market. The pressure switch structure comprises a shell, a diaphragm, a butterfly reed, a switch component, a sunflower gland, a seal sleeve, an O-shaped ring and a push rod. The shell is provided with an inflow passage, an outflow passage and a valve cavity, and when water flows from the inflow passage to the valve cavity, the water flows out of the outflow passage. When the water inlet end of the shell does not reach a certain pressure, the movable contact and the static contact are closed, the switch is switched on, when the pressure at the water inlet end of the shell is gradually increased, the deformation pressure of the rubber diaphragm is transmitted to the disc-shaped reed, when the pressure reaches the bounce value of the disc-shaped reed, the disc-shaped reed instantaneously deforms and jumps, the pressure is transmitted to the push rod, the push rod pushes the movable reed, the static contact and the dynamic contact are disconnected, and thus the external circuit is controlled by the on-off of the pressure switch. Similar to pressure switches in the current market, all are single channel pressure switches.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the shortcoming and not enough that prior art exists, and provide a small-size contrary pressure switch that ends.

The utility model discloses the technical scheme who takes as follows: a small-sized non-return pressure switch comprises a shell, a switch component positioned in the shell, and a driving component used for driving the switch component to be switched on and off, a water inlet passage, a water outlet passage and a valve cavity are arranged in the shell, the driving component comprises a diaphragm, the diaphragm divides the valve cavity into a fluid cavity and a switch component mounting cavity, the fluid cavity is communicated with the water inlet channel and the water outlet channel, the switch component is arranged in the switch component mounting cavity, the water inlet channel and/or the water outlet channel are/is internally provided with a one-way valve component for realizing the one-way conduction of the water inlet channel to the flow direction of the water outlet channel, the check valve component comprises a valve body, a movable rod, a rear cover, a spring and a valve clack, the valve body is connected with the rear cover, the movable rod is limited in the rear cover and can slide along the axial direction, the valve clack is connected with the movable rod, and the spring is positioned between the valve clack and the rear cover to enable the valve clack to be in sealing fit with the radial surface of the inner wall of the valve body.

The valve clack includes last valve plate, lower valve plate and inlays the first O type sealing washer of establishing between last valve plate and lower valve plate with movable rod fixed connection, the up end of valve plate is gone up in the spring butt, the footpath face of valve body inner wall include with the sealed complex first radial inclined plane of first O type sealing washer.

The outer diameter of lower valve plate is less than the outer diameter of last valve plate, lower valve plate outer peripheral face is equipped with the sealed face of toper, the footpath face of valve body inner wall includes can form the radial inclined plane of face seal with the sealed face of toper second.

The upper valve plate is characterized in that a spring limiting convex ring is arranged on the upper end face of the upper valve plate, the spring is limited in the spring limiting convex ring, and the valve body is matched with the rear cover in a clamping mode.

The driving assembly comprises a butterfly reed and a push rod, the switch assembly comprises a mounting frame, a switch seat, a movable insertion piece, a static insertion piece, a movable reed, a movable contact and a static contact, the switch seat is connected with the mounting frame to form a closed movable and static contact cavity, the static contact is connected with the static insertion piece, the static insertion piece penetrates through and is fixed on the switch seat, the movable contact is connected with the movable reed, the movable insertion piece penetrates through and is fixed on the switch seat, the movable reed is fixed on the movable insertion piece, the butterfly reed is positioned between the mounting frame and the valve body, the push rod penetrates through the mounting frame, and two ends of the push rod are respectively matched with the butterfly reed and the movable reed;

the valve body is fixed in the water inlet channel, a second O-shaped sealing ring is arranged between the valve body and the inner wall of the shell, and the water inlet channel and the water outlet channel are opposite to the push rod and are eccentrically arranged.

The diaphragm limiting groove is formed in the shell, an elastic annular lug is arranged on the periphery of the diaphragm, the elastic annular lug is embedded in the diaphragm limiting groove, and the lower end face of the mounting frame abuts against the upper end face of the elastic annular lug.

The upper end face of the elastic annular bump consists of a first abutting convex ring positioned on the outer periphery and a first abutting plane positioned on the inner side of the first abutting convex ring, the lower end face of the mounting frame is provided with a second abutting convex ring positioned on the inner periphery and a second abutting plane positioned on the outer side of the second abutting convex ring, the first abutting convex ring and the second abutting plane are abutted with each other and are in sealing fit, and the second abutting convex ring and the first abutting plane are abutted with each other and are in sealing fit; the first abutting convex ring and the second abutting convex ring are separated by a certain distance.

The switch assembly is fixed in the switch assembly mounting cavity by fixedly connecting the gland with the shell, and the movable insertion piece and the static insertion piece both penetrate through the gland and extend out of the gland; and sealing sleeves made of elastic materials are respectively arranged between the gland and the movable insertion piece and between the gland and the static insertion piece.

The sealing sleeve comprises a main body sleeved outside the movable insertion piece or the static insertion piece and a limiting part positioned between the lower end face of the gland and the upper end face of the switch base, wherein the inner wall of the main body is provided with at least one first sealing convex ring, and the lower end face of the limiting part is provided with at least one second sealing convex ring; and a third O-shaped sealing ring is arranged between the switch seat and the mounting frame.

The shell comprises a water inlet straight insertion pipe and a water outlet straight insertion pipe, and the water inlet channel and the water outlet channel are respectively communicated with the pipe orifice of the water inlet straight insertion pipe and the pipe orifice of the water outlet straight insertion pipe; the straight intubate of intaking and the straight intubate outer wall of play water from interior to exterior set gradually the spacing step of sealing washer, sealing washer cover establish tub portion and be located the annular groove that the outer end of pipe portion was established to the sealing washer cover, the annular groove inner wall is close to the sealing washer cover and establishes the one end terminal surface of tub portion for leading outer inclined plane, and its one end terminal surface of keeping away from the sealing washer cover and establishing tub portion is the perpendicular or position face that ends that forms the inner inclined plane of relative the central axis.

The utility model has the advantages as follows: the utility model discloses combine check valve and pressure switch together, the check valve adopts the footpath face to seal, and is longe-lived, can more effectual let sealed face closely laminate improvement product sealing performance by a wide margin when sealed.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings obtained from these drawings still belong to the scope of the present invention without inventive laboriousness.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is a cross-sectional view of an embodiment of the present invention;

FIG. 3 is an enlarged view of portion A of FIG. 2;

FIG. 4 is an exploded view of a check valve assembly according to an embodiment of the present invention;

FIG. 5 is a cross-sectional view of the housing in an embodiment of the invention;

fig. 6 is a cross-sectional view of a mounting bracket according to an embodiment of the present invention;

FIG. 7 is a cross-sectional view of a diaphragm according to an embodiment of the present invention;

FIG. 8 is an enlarged view of portion B of FIG. 2;

fig. 9 is a cross-sectional view of a sealing sleeve in an embodiment of the invention;

fig. 10 is an enlarged view of a portion a of fig. 5.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings.

It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are used for distinguishing two entities with the same name but different names or different parameters, and it is understood that "first" and "second" are only used for convenience of expression and should not be construed as limitations to the embodiments of the present invention, and the following embodiments do not describe the embodiments one by one.

The terms of direction and position in the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., refer to the direction and position of the attached drawings only. Accordingly, the use of directional and positional terms is intended to illustrate and understand the present invention and is not intended to limit the scope of the invention.

As shown in fig. 1 and fig. 2, a small-sized non-return pressure switch comprises a housing 17, a switch assembly located in the housing 17, and a driving assembly for driving the switch assembly to be turned on or off, wherein a water inlet passage 12, a water outlet passage 11 and a valve cavity are arranged in the housing 17, the driving assembly comprises a membrane 18, the membrane 18 separates the valve cavity into a fluid chamber and a switch assembly installation cavity, the fluid chamber is communicated with the water inlet passage 12 and the water outlet passage 11, the switch assembly is arranged in the switch assembly installation cavity, a check valve assembly for realizing one-way conduction of the water inlet passage 12 to the flow direction of the water outlet passage 11 is arranged in the water inlet passage 12 and/or the water outlet passage 11, the check valve assembly comprises a valve body 13, a movable rod 14, a rear cover 16, a spring 15 and a valve flap 32, the valve body 13 is connected with the rear cover 16, the movable rod 14 is limited in the rear cover 16 and can slide along the axial direction, the flap 32 is connected to the movable rod 14, and the spring 15 is located between the flap 32 and the rear cover 16 to make the flap 32 in sealing engagement with the radial surface of the inner wall of the valve body 13.

As shown in fig. 3 and 4, the valve flap 32 includes an upper valve plate 321 fixedly connected to the movable rod 14, a lower valve plate 322, and a first O-ring 323 embedded between the upper valve plate 321 and the lower valve plate 322, the spring 15 abuts against an upper end surface of the upper valve plate 321, and a radial surface of an inner wall of the valve body 13 includes a first radial inclined surface 131 in sealing engagement with the first O-ring 323. With this arrangement, the greater the fluid pressure above the valve flap 32, the better the sealing effect of the first O-ring 323.

Further, the outer diameter of the lower valve plate 322 is smaller than the outer diameter of the upper valve plate 321, a tapered sealing surface 3221 is disposed on the outer peripheral surface of the lower valve plate 322, and the radial surface of the inner wall of the valve body 13 includes a second radial inclined surface 132 capable of forming a surface seal with the tapered sealing surface 3221. The conical sealing surface 3221 and the second radial inclined surface 132 can limit displacement of the valve flap 32, and prevent the first O-ring 323 from being excessively deformed, which may cause the one-way valve to be opened abnormally.

Furthermore, a spring limiting convex ring 3211 is arranged on the upper end face of the upper valve plate 321, the spring 15 is limited in the spring limiting convex ring 3211, and the valve body 13 is in clamping fit with the rear cover 16.

As shown in fig. 2, the driving assembly comprises a butterfly spring 19 and a push rod 29, the switch assembly comprises a mounting frame 25, a switch seat 21, a movable insertion piece 23, a static insertion piece 31, a movable spring 26, a movable contact 27 and a static contact 28, the switch seat 21 is connected with the mounting frame 25 to form a closed movable and static contact cavity, the static contact 28 is connected with the static insertion piece 31, the static insertion piece 31 penetrates through and is fixed on the switch seat 21, the movable contact 27 is connected with the movable spring 26 through a rivet 20, the movable insertion piece 23 penetrates through and is fixed on the switch seat 21, the movable spring 26 is fixed on the movable insertion piece 23, the butterfly spring 19 is located between the mounting frame 25 and the valve body 13, the push rod 29 penetrates through the mounting frame 25, and two ends of the push rod are respectively matched with the butterfly spring 19 and the movable spring 26;

the valve body 13 is fixed in the water inlet channel 12, a second O-shaped sealing ring 33 is arranged between the valve body 13 and the inner wall of the shell 17, and the water inlet channel 12 is opposite to the water outlet channel 11 and the push rod 29 is eccentrically arranged. This arrangement reduces interference of fluid impact with the drive assembly.

As shown in fig. 5, a diaphragm limiting groove 171 is formed in the housing 17, an elastic annular protrusion 181 is formed around the diaphragm 18, the elastic annular protrusion 181 is embedded in the diaphragm limiting groove 171, and the lower end surface of the mounting bracket 25 abuts against the upper end surface of the elastic annular protrusion 181.

Further, as shown in fig. 6 and 7, the upper end surface of the elastic annular projection 181 is composed of a first abutting convex ring 1811 at the outer periphery and a first abutting plane 1812 at the inner side of the first abutting convex ring 1811, the lower end surface of the mounting bracket 25 is provided with a second abutting convex ring 251 at the inner periphery and a second abutting plane 252 at the outer side of the second abutting convex ring 251, the first abutting convex ring 1811 and the second abutting plane 252 are in abutting sealing fit with each other, and the second abutting convex ring 251 and the first abutting plane 1812 are in abutting sealing fit with each other; the first abutting convex ring 1811 and the second abutting convex ring 251 are separated by a certain distance. The arrangement can further improve the sealing effect, the first abutting convex ring 1811 and the first abutting plane 1812 of the elastic annular convex block 181 are both elastically deformable, the second abutting convex ring 251 and the second abutting plane 252 of the mounting frame 25 are both rigid, when abutting against each other, the second abutting convex ring 251 extrudes the first abutting plane 1812 to deform the first abutting plane 1812, the second abutting plane 252 interacts with the first abutting convex ring 1811 to form a double sealing ring, and the first abutting convex ring 1811 and the second abutting convex ring 251 are separated by a certain distance, so that a cavity is formed between the double sealing rings, an expansion cavity is formed, resistance is generated to the leakage of fluid, and the entry into a movable contact cavity and a static contact cavity is avoided.

As shown in fig. 2, the switch assembly further comprises a gland 22, the gland 22 is fixedly connected with the housing 17 to fix the switch assembly in the switch assembly mounting cavity, and the movable insertion piece 23 and the static insertion piece 31 both pass through the gland 22 and extend out of the gland 22; as shown in fig. 8, sealing sleeves 24 made of elastic material are respectively arranged between the gland 22 and the movable insertion piece 23 and the static insertion piece 31.

Further, as shown in fig. 9, the sealing sleeve 24 includes a main body 241 sleeved outside the moving insertion piece 23 or the static insertion piece 31, and a limiting portion 242 located between the lower end surface of the gland 22 and the upper end surface of the switch base 21, the inner wall of the main body 241 is provided with at least one first sealing convex ring 2411, and the lower end surface of the limiting portion 242 is provided with at least one second sealing convex ring 2421; a third O-ring 30 is disposed between the switch base 21 and the mounting bracket 25. The first sealing convex ring 2411 forms sealing with the movable insertion sheet 23 or the static insertion sheet 31 therein, and the second sealing convex ring 2421 forms sealing with the upper end surface of the switch base 21, so that the fluid can be effectively prevented from penetrating out of the position of the movable insertion sheet 23 or the static insertion sheet 31 to enter a cavity of the movable and static contact points.

As shown in fig. 5, the housing 17 includes a water inlet straight cannula 172 and a water outlet straight cannula 173, and the water inlet channel 12 and the water outlet channel 11 are respectively communicated with a nozzle of the water inlet straight cannula 172 and a nozzle of the water outlet straight cannula 173; as shown in fig. 10, the outer walls of the water inlet straight insertion tube 172 and the water outlet straight insertion tube 173 are sequentially provided with a sealing ring limiting step 176, a sealing ring sleeve-arranged tube portion 174 and an annular groove 175 located at the outer end of the sealing ring sleeve-arranged tube portion 174 from inside to outside, the end surface of the inner wall of the annular groove 175 close to the sealing ring sleeve-arranged tube portion 174 is a guiding outer inclined surface 1751, and the end surface of the end of the inner wall of the annular groove 175 away from the sealing ring sleeve-arranged tube portion 174 is a stop surface 1752 which is vertical to the central axis or forms an inner inclined surface. The design of straight intubate is adopted to conventional solenoid valve, can adopt the structure of sealing washer spacing groove usually, and the sealing washer spacing groove needs set up according to the quantity of the O type sealing washer of predetermineeing, position, and this embodiment adopts the sealing washer cover to establish tub portion 173 outer ends to no limit structure of O type sealing washer, and the restriction to O type sealing washer mountable quantity is relied on the sealing washer cover to establish tub portion 174 length like this, can set up longer messenger's customer end and set up the O type sealing washer of a certain quantity as required. Further annular groove 175's setting can effectively prevent deviating from of the outer O type sealing washer of sealing washer cover pipe portion 174, and the outer inclined plane 1751 of direction and the face 1752 of stopping can make the O type sealing washer that is located annular groove 175 can easily push away on sealing washer cover pipe portion 174 along the outer inclined plane 1751 of direction, but can't push away the outer end (the lower extreme in the picture) of annular groove 175, form the anticreep effect.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention, therefore, all equivalent variations of the present invention are intended to be covered by the present invention.

Claims

1. The utility model provides a small-size contrary pressure switch that ends, includes shell (17), is located switch module in shell (17), is used for the drive assembly of drive switch module break-make, be equipped with inhalant canal (12), exhalant canal (11) and valve pocket in shell (17), drive assembly includes diaphragm (18), diaphragm (18) separate the valve pocket for fluid cavity and switch module installation cavity, its characterized in that: fluid chamber intercommunication inhalant canal (12), exhalant canal (11), switch module sets up in the switch module installation cavity, be provided with in inhalant canal (12) and/or exhalant canal (11) and be used for realizing inhalant canal (12) to the one-way check valve subassembly of the circulation direction one-way conduction of exhalant canal (11), check valve subassembly includes valve body (13), movable rod (14), back lid (16), spring (15), valve clack (32), valve body (13) are connected with back lid (16), movable rod (14) are spacing can follow the axial and slide in back lid (16), valve clack (32) link to each other with movable rod (14), spring (15) are located and make between valve clack (32) and back lid (16) the sealed cooperation of footpath face of valve clack (32) and valve body (13) inner wall.

2. The small-sized non-return pressure switch according to claim 1, characterized in that: valve clack (32) including with movable rod (14) fixed connection last valve plate (321), lower valve plate (322) and inlay and establish first O type sealing washer (323) between last valve plate (321) and lower valve plate (322), the up end of valve plate (321) is gone up in spring (15) butt, the footpath face of valve body (13) inner wall include with first radial inclined plane (131) of first O type sealing washer (323) sealed complex.

3. The small-sized non-return pressure switch according to claim 2, characterized in that: the outer diameter of the lower valve plate (322) is smaller than that of the upper valve plate (321), a conical sealing surface (3221) is arranged on the outer peripheral surface of the lower valve plate (322), and the radial surface of the inner wall of the valve body (13) comprises a second radial inclined surface (132) capable of forming surface sealing with the conical sealing surface (3221).

4. The small-sized non-return pressure switch according to claim 2, characterized in that: the upper valve plate (321) is provided with a spring limiting convex ring (3211) on the upper end face, the spring (15) is limited in the spring limiting convex ring (3211), and the valve body (13) is matched with the rear cover (16) in a clamping manner.

5. The small-sized non-return pressure switch according to claim 1, characterized in that: the driving component comprises a butterfly spring (19) and a push rod (29), the switch component comprises a mounting frame (25), a switch seat (21), a movable inserting sheet (23), a static inserting sheet (31), a movable spring (26), a movable contact (27) and a static contact (28), the switch seat (21) is connected with the mounting frame (25) to form a closed movable and static contact cavity, the static contact (28) is connected with the static inserting sheet (31), the static inserting sheet (31) penetrates through and is fixed on the switch seat (21), the movable contact (27) is connected with the movable spring piece (26), the movable inserting sheet (23) penetrates through and is fixed on the switch seat (21), the movable spring (26) is fixed on the movable inserting sheet (23), the butterfly reed (19) is positioned between the mounting frame (25) and the valve body (13), the push rod (29) penetrates through the mounting frame (25), and two ends of the push rod are respectively matched with the butterfly spring plate (19) and the movable spring plate (26);

valve body (13) are fixed in inhalant canal (12) in, be equipped with second O type sealing washer (33) between valve body (13) and shell (17) inner wall, inhalant canal (12) with exhalant canal (11) are relative catch bar (29) eccentric settings.

6. The small-sized non-return pressure switch according to claim 5, characterized in that: be equipped with diaphragm spacing groove (171) in shell (17), diaphragm (18) circumference is equipped with elasticity annular convex block (181), elasticity annular convex block (181) inlay is located in diaphragm spacing groove (171), the up end of the lower terminal surface butt elasticity annular convex block (181) of mounting bracket (25).

7. The small-sized non-return pressure switch according to claim 6, wherein: the upper end face of the elastic annular convex block (181) consists of a first abutting convex ring (1811) positioned at the outer periphery and a first abutting plane (1812) positioned at the inner side of the first abutting convex ring (1811), the lower end face of the mounting frame (25) is provided with a second abutting convex ring (251) positioned at the inner periphery and a second abutting plane (252) positioned at the outer side of the second abutting convex ring (251), the first abutting convex ring (1811) and the second abutting plane (252) are abutted and sealed and matched with each other, and the second abutting convex ring (251) and the first abutting plane (1812) are abutted and sealed and matched with each other; the first abutting convex ring (1811) and the second abutting convex ring (251) are separated by a certain distance.

8. The small-sized non-return pressure switch according to claim 5, characterized in that: the switch assembly is fixed in the switch assembly mounting cavity by fixedly connecting the gland (22) with the shell (17), and the movable insertion piece (23) and the static insertion piece (31) both penetrate through the gland (22) and extend out of the gland (22); gland (22) with move between inserted sheet (23), the quiet inserted sheet (31) and be equipped with seal cover (24) of being made by elastic material respectively.

9. The small-sized non-return pressure switch according to claim 8, wherein: the sealing sleeve (24) comprises a main body (241) sleeved outside the movable insertion piece (23) or the static insertion piece (31) and a limiting part (242) positioned between the lower end face of the gland (22) and the upper end face of the switch base (21), at least one first sealing convex ring (2411) is arranged on the inner wall of the main body (241), and at least one second sealing convex ring (2421) is arranged on the lower end face of the limiting part (242); and a third O-shaped sealing ring (30) is arranged between the switch seat (21) and the mounting frame (25).

10. The miniature non-return pressure switch of any one of claims 1-9, wherein: the shell (17) comprises a water inlet straight insertion pipe (172) and a water outlet straight insertion pipe (173), and the water inlet channel (12) and the water outlet channel (11) are respectively communicated with a pipe orifice of the water inlet straight insertion pipe (172) and a pipe orifice of the water outlet straight insertion pipe (173); the straight intubate of intaking (172) and the straight intubate of play water (173) outer wall from interior to exterior all sets gradually the spacing step of sealing washer (176), sealing washer cover and establishes pipe portion (174) and be located sealing washer cover and establish annular groove (175) of pipe portion (174) outer end, the one end terminal surface that annular groove (175) inner wall was close to sealing washer cover and establishes pipe portion (174) is for leading outer inclined plane (1751), and its one end terminal surface of keeping away from sealing washer cover and establishing pipe portion (174) is the perpendicular or position face (1752) that ends that forms the inner inclined plane of relative central axis.