CN217401706U

CN217401706U - Piston assembly and solenoid valve

Info

Publication number: CN217401706U
Application number: CN202221265828.6U
Authority: CN
Inventors: 田鹏; 陈浙航; 金勇�
Original assignee: Zhejiang Dunan Machinery Co Ltd
Current assignee: Zhejiang Dunan Machinery Co Ltd
Priority date: 2022-05-20
Filing date: 2022-05-20
Publication date: 2022-09-09
Anticipated expiration: 2032-05-20

Abstract

The utility model provides a piston assembly and solenoid valve, piston assembly includes: the piston is provided with a containing groove, and the bottom wall of the containing groove is provided with a riveting through hole; the retaining ring is positioned in the accommodating groove and arranged around the riveting through hole, two surfaces of the retaining ring are respectively an abutting surface and a riveting surface, and the abutting surface abuts against the bottom wall of the accommodating groove; the riveting seat comprises a main body and a riveting ring arranged on the end face of the main body, the riveting seat penetrates through the riveting through hole and the check ring, the end face of the main body is located between the abutting face and the riveting face, and the riveting ring penetrates through the check ring and is in riveting fit with the riveting face. By adopting the scheme, the end face of the main body is located between the abutting face and the riveting face, so that the riveting pressure generated by the riveting ring in the riveting process acts on the retaining ring, the riveting pressure generated by the riveting ring in the riveting process due to the fact that the part of the riveting ring is located in the riveting through hole in the prior art is prevented from acting on the piston, the condition that the piston is deformed and failed is avoided, and the stability and the reliability of the piston assembly are improved.

Description

Piston assembly and solenoid valve

Technical Field

The utility model relates to a solenoid valve technical field particularly, relates to a piston assembly and solenoid valve.

Background

The assembly process of the piston assembly is as follows: the sealing gasket, the piston and the check ring are sequentially arranged on the riveting seat, and then the riveting ring of the riveting seat is turned over through riveting, so that the parts are fixed. However, in the assembly process of the existing piston assembly, the section of the riveting seat main body is lower than the abutting surface of the retainer ring, namely, the riveting ring is partially arranged in the riveting through hole, and in the riveting process of the riveting ring, the riveting pressure can act on the side wall of the riveting through hole of the piston, so that the riveting through hole of the piston is deformed to generate excessive riveting, or the outer diameter of the piston is enlarged, and the action of the electromagnetic valve is poor.

SUMMERY OF THE UTILITY MODEL

The utility model provides a piston assembly and solenoid valve to solve the piston assembly among the prior art problem of the easy atress deformation of piston when the assembly.

In order to solve the above problem, according to an aspect of the present invention, the present invention provides a piston assembly, including: the piston is provided with a containing groove, and the bottom wall of the containing groove is provided with a riveting through hole; the retaining ring is positioned in the accommodating groove and arranged around the riveting through hole, two surfaces of the retaining ring are respectively an abutting surface and a riveting surface, and the abutting surface abuts against the bottom wall of the accommodating groove; the riveting seat comprises a main body and a riveting ring arranged on the end face of the main body, the riveting seat penetrates through the riveting through hole and the check ring, the end face of the main body is located between the abutting face and the riveting face, and the riveting ring penetrates through the check ring and is in riveting fit with the riveting face.

Further, the diapire of holding tank has the standing groove, and the retaining ring is located the standing groove, and the thickness of retaining ring is greater than the degree of depth of standing groove.

Furthermore, the inner diameter of the retainer ring is D1, the minimum inner diameter of the riveting through hole is D2, and D1 is less than D2.

Further, D1+1mm < D2.

Furthermore, the piston assembly further comprises a sealing gasket, the sealing gasket is sleeved on the riveting seat, one end of the sealing gasket is abutted to the riveting seat, and the other end of the sealing gasket is abutted to the outer wall of the piston.

Further, the riveting through-hole includes interconnect's first hole section and second hole section, first hole section and holding tank intercommunication, and the second hole section is located one side that first hole section deviates from the holding tank, and the radial dimension of second hole section is greater than the radial dimension of first hole section, and some settings of sealed pad are in the second hole section.

Further, the main part is including the spacing cap that connects gradually, spacing section and direction section, the radial dimension of spacing section is greater than the radial dimension of direction section and is less than the radial dimension of spacing cap, sealed the pot head is established in spacing section, the piston butt of the terminal surface department of spacing section and second hole section, spacing cap and sealed butt of filling up, the direction section passes first hole section and sets up, the riveting ring sets up the one side that deviates from spacing section at the direction section, the riveting seat is structure as an organic whole.

Further, the piston includes the bottom plate and the annular side wall that sets up around the bottom plate, and the region between bottom plate and the annular side wall forms the holding tank, and the riveting through-hole sets up on the diapire, is provided with annular seal groove on the annular side wall, and piston assembly still includes the sealing washer, and the sealing washer setting is in annular seal groove.

According to another aspect of the present invention, there is provided a solenoid valve, the solenoid valve includes a valve body component, a pilot valve and the above-mentioned piston assembly, the valve body component has a first channel, a second channel, a sliding chamber and a pilot chamber, the sliding chamber has a first valve port communicated with the first channel, the piston assembly is movably disposed in the sliding chamber to block or open the first valve port, the pilot chamber has a second valve port communicated with the second channel, the pilot valve is partially disposed in the pilot chamber to block or open the second valve port, the first channel and the second channel are communicated with each other through the first valve port in an on-off manner, the first valve port is disposed on the second channel, the first channel is communicated with the sliding chamber, and the pilot chamber is communicated with the sliding chamber.

Furthermore, the solenoid valve still includes elastic component and pedestal, and the pedestal setting is in the holding tank of piston, and the both ends of elastic component are connected with pedestal, valve body part respectively.

Use the technical scheme of the utility model, a piston assembly is provided, include: the piston is provided with a containing groove, and the bottom wall of the containing groove is provided with a riveting through hole; the retaining ring is positioned in the accommodating groove and arranged around the riveting through hole, two surfaces of the retaining ring are respectively an abutting surface and a riveting surface, and the abutting surface abuts against the bottom wall of the accommodating groove; the riveting seat comprises a main body and a riveting ring arranged on the end face of the main body, the riveting seat penetrates through the riveting through hole and the check ring, the end face of the main body is located between the abutting face and the riveting face, and the riveting ring penetrates through the check ring and is in riveting fit with the riveting face. By adopting the scheme, in the assembly process of the piston assembly, the end face of the main body is positioned between the abutting surface and the riveting surface, so that the riveting pressure generated in the riveting process of the riveting ring acts on the retaining ring, the situation that the piston is easy to deform and lose efficacy due to the fact that the riveting pressure generated in the riveting process of the riveting ring acts on the piston because the part of the riveting ring is positioned in the riveting through hole in the prior art is avoided, and the stability and the reliability of the piston assembly are improved.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic structural diagram of a piston assembly provided by an embodiment of the present invention;

FIG. 2 shows an enlarged view of selected locations of FIG. 1;

FIG. 3 shows a dimensional schematic of the piston assembly of FIG. 1;

fig. 4 shows a schematic structural diagram of a solenoid valve according to another embodiment of the present invention.

Wherein the figures include the following reference numerals:

10. a piston; 11. accommodating grooves; 12. a base plate; 13. an annular sidewall; 14. a sealing groove;

20. a retainer ring; 21. a butting surface; 22. riveting the joint surface;

30. riveting a base; 31. a main body; 311. a limiting cap; 312. a limiting section; 313. a guide section; 32. riveting a ring;

40. a gasket;

50. a seal ring;

60. a valve body member; 61. a first channel; 62. a second channel; 63. a sliding cavity; 64. a pilot cavity;

70. a pilot valve;

81. an elastic member; 82. a base body.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1-3, embodiments of the present invention provide a piston assembly, comprising: a piston 10, the piston 10 having a receiving groove 11, a bottom wall of the receiving groove 11 having a rivet through hole; the retainer ring 20 is positioned in the accommodating groove 11, the retainer ring 20 is arranged around the riveting through hole, two surfaces of the retainer ring 20 are respectively an abutting surface 21 and a riveting surface 22, and the abutting surface 21 abuts against the bottom wall of the accommodating groove 11; riveting seat 30, riveting seat 30 include main part 31 and the riveting ring 32 of setting on the terminal surface of main part 31, and riveting seat 30 penetrates riveting through-hole and retaining ring 20, and the terminal surface of main part 31 is located between butt surface 21 and the riveting face 22, and riveting ring 32 passes retaining ring 20 and cooperates with riveting face 22 riveting.

In the embodiment, in the assembling process of the piston assembly, the end surface of the main body 31 is located between the abutting surface 21 and the riveting surface 22, so that the riveting pressure generated by the riveting ring 32 in the riveting process acts on the check ring 20, the situation that the riveting pressure generated by the riveting ring in the riveting process acts on the piston due to the fact that the part of the riveting ring is located in the riveting through hole in the prior art, the deformation and the failure of the piston are easily caused is avoided, and the stability and the reliability of the piston assembly are improved.

Specifically, as shown in fig. 2, the height of the rivet ring 32 above the abutment surface is L1, and the thickness of the retainer ring 20 is L2, 0 < L1 < L2. If L1 < 0, the riveting pressure of the riveting ring 32 acts on the piston, so that the piston is prone to deformation failure. If L1 > L2, the riveting ring 32 is higher than the riveting surface 22, so that the riveting of the riveting ring 32 and the retainer ring 20 is not reliable.

As shown in fig. 1, the bottom wall of the accommodating groove 11 has a placing groove, the retainer ring 20 is located in the placing groove, and the thickness of the retainer ring 20 is larger than the depth of the placing groove. By the arrangement, the riveting reliability of the riveting ring 32 and the retainer ring 20 is ensured, the riveting pressure of the riveting ring 32 is prevented from acting on the piston 10, and the reliability of riveting connection is ensured. Specifically, the abutment surface 21 of the retainer ring 20 abuts against the bottom wall of the placement groove.

As shown in FIG. 3, the inner diameter of the retainer ring 20 is D1, and the minimum inner diameter of the rivet through-hole is D2, D1 < D2. Set up like this for have the clearance between riveting through-hole and the retaining ring 20, avoid the two riveting ring when the zero clearance radially extrude retaining ring 20 at the riveting pressure that the riveting in-process produced and make retaining ring 20 extrude the piston, lead to the condition of piston 10 atress deformation, improve piston assembly's stability and reliability.

Further, D1+1mm < D2. By means of the arrangement, the dimensional relation between the D1 and the D2 is further limited, the situation that the main body 31 of the riveting seat 30 in the riveting through hole is easy to move due to the fact that the gap between the D1 and the D2 is too large is prevented, and the stability of connection of the riveting seat 30 and the piston 10 is guaranteed.

As shown in fig. 1 to fig. 3, the piston assembly further includes a sealing gasket 40, the sealing gasket 40 is sleeved on the riveting base 30, one end of the sealing gasket 40 abuts against the riveting base 30, and the other end of the sealing gasket 40 abuts against the outer wall of the piston 10. By the arrangement, the sealing gasket 40 is arranged to seal and support the connecting position of the riveting seat 30 and the piston 10, and the reliability of the piston assembly is ensured.

Specifically, the riveting through-hole includes interconnect's first hole section and second hole section, first hole section and holding tank 11 intercommunication, and the second hole section is located one side that first hole section deviates from holding tank 11, and the radial dimension of second hole section is greater than the radial dimension of first hole section, and some settings of sealed pad 40 are in the second hole section.

In this embodiment, the radial dimension of the second bore section is greater than the radial dimension of the first bore section, and a portion of the seal 40 is located in the second bore section, thereby facilitating the machining of the first and second bore sections and facilitating the installation and positioning of the seal 40. The other part of sealed pad 40 is located outside the second hole section, and the main part 31 of riveting seat 30 and the sealed one end butt that fills up 40 and be located outside the second hole section are convenient for extrude the installation in piston assembly's assembling process for piston 10, sealed pad 40, riveting seat 30 three can closely laminate, guarantee piston assembly's sealed effect.

Further, main part 31 is including the spacing cap 311 that connects gradually, spacing section 312 and direction section 313, the radial dimension of spacing section 312 is greater than the radial dimension of direction section 313 and is less than the radial dimension of spacing cap 311, sealed pad 40 cover is established on spacing section 312, the piston 10 butt of the terminal surface department of spacing section 312 and second hole section, spacing cap 311 and sealed pad 40 butt, direction section 313 passes first hole section and sets up, riveting ring 32 sets up the one side that deviates from spacing section 312 at direction section 313, riveting seat 30 is structure as an organic whole.

In the installation process of the piston assembly, it is assumed that the riveting seat 30 is fixedly arranged, the sealing gasket 40 is firstly sleeved on the limiting section 312 and abutted against the limiting cap 311, then the piston 10 is sleeved on the riveting seat 30 and the sealing gasket 40, the sealing gasket 40 is partially arranged in the second hole section and is in limiting fit with the second hole section, the sealing gasket 40 faces the end face of the limiting cap 311 and abutted against the limiting cap 311, the sealing gasket 40 deviates from the end face of the limiting cap 311 and the piston 10 abutted against the end face of the second hole section, meanwhile, the limiting section 312 is also abutted against the end face of the second hole section, the first hole section is sleeved on the guide section 313, the riveting ring 32 penetrates through holes and is located in the accommodating groove 11, finally, the check ring 20 is installed in the accommodating groove, the riveting ring 32 is riveted, and the above parts are fixedly connected together. Due to the arrangement, the piston assembly is convenient to assemble, the assembling efficiency of the piston assembly is improved, and the assembling precision is ensured while the assembling tightness is ensured. Further, the riveting base 30 is of an integral structure, so that the riveting base 30 can be conveniently machined, and meanwhile, the riveting base 30 can be conveniently used for positioning other parts during installation.

As shown in fig. 1 and 3, the piston 10 includes a bottom plate 12 and an annular side wall 13 disposed around the bottom plate 12, a receiving groove 11 is formed in an area between the bottom plate 12 and the annular side wall 13, a rivet through hole is disposed on a bottom wall, an annular seal groove 14 is disposed on the annular side wall 13, and a seal ring 50 is disposed in the annular seal groove 14. In the embodiment, the sealing ring 50 arranged in the annular sealing groove 14 facilitates the sealing installation of the piston assembly and other parts, and ensures the reliability of the piston assembly.

As shown in fig. 4, another embodiment of the present invention provides a solenoid valve, the solenoid valve includes a valve body 60, a pilot valve 70 and the above-mentioned piston assembly, the valve body 60 has a first channel 61, a second channel 62, a sliding cavity 63 and a pilot cavity 64, the sliding cavity 63 has a first valve port communicated with the first channel 61, the piston assembly is movably disposed in the sliding cavity 63 to block or open the first valve port, the pilot cavity 64 has a second valve port communicated with the second channel 62, the pilot valve 70 is partially disposed in the pilot cavity 64 to block or open the second valve port, the first channel 61 and the second channel 62 are communicated with each other via the first valve port, the first channel 61 is communicated with the sliding cavity 63, and the pilot cavity 64 is communicated with the sliding cavity 63.

As shown in fig. 4, the valve closing state of the solenoid valve of the present embodiment is shown, in which the first passage 61 and the second passage 62 are not communicated, and the valve closing principle is as follows: the first channel 61, the sliding cavity 63 and the pilot cavity 64 are communicated, fluid in the first channel 61 enters the sliding cavity 63, the second valve port is closed at the moment, namely the second channel 62 is not communicated with the pilot cavity 64, the fluid pressure of the first channel 61 and the fluid pressure of the sliding cavity 63 are the same and are larger than the fluid pressure of the second channel 62, and the piston assembly moves downwards under the action of the fluid pressure and closes the first valve port tightly. When the electromagnetic valve is switched from the valve closing state to the valve opening state, the pilot valve 70 is electrified to enable the pilot valve 70 to move, the pilot valve 70 moves to open the second valve port to enable the second channel 62 to be communicated with the sliding pilot cavity 64, because the pilot cavity 64 and the sliding cavity 63 are always communicated, the pressure of the fluid in the sliding cavity 63 is released through the pilot cavity 64 and the second channel 62 in sequence, the pressure in the sliding cavity 63 is quickly reduced, the piston assembly moves upwards under the action of the pressure difference at the two sides of the sliding cavity 63, so that the first valve port is opened, and the first passage 61 and the second passage 62 are communicated, in this process, the flow area of the position where the first passage 61 and the sliding chamber 63 are always communicated is smaller than the flow area of the second valve port, so the pressure release speed for the sliding chamber 63 is higher than the pressure supply speed, and the fluid pressure in the sliding chamber 63 after pressure release is smaller than the fluid pressure of the first passage 61. In this embodiment, the piston assembly is the above piston assembly, so that the situation that in the prior art, the riveting pressure generated by the riveting ring in the riveting process acts on the piston due to the fact that the part of the riveting ring is located in the riveting through hole, and the piston is prone to deformation and failure is avoided, the reliability of the movement of the piston assembly in the sliding cavity 63 is guaranteed, and the performance of the solenoid valve is further guaranteed.

Specifically, the solenoid valve further includes an elastic member 81 and a seat body 82, the seat body 82 is disposed in the receiving groove 11 of the piston 10, and two ends of the elastic member 81 are respectively connected to the seat body 82 and the valve body part 60.

In the present embodiment, the seat 82 and the elastic member 81 disposed inside the piston assembly ensure the reliability of the movement of the piston assembly, and specifically, during the process of switching the solenoid valve from the valve-closed state to the valve-open state, the elastic member 81 is compressed to provide a certain buffer for the movement of the piston assembly, and during the process of switching the solenoid valve from the valve-open state to the valve-closed state, the elastic member 81 is expanded to provide a thrust for the piston member to close the first valve port, so as to close the first valve port more quickly.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A piston assembly, comprising:

a piston (10), the piston (10) having a housing groove (11), a bottom wall of the housing groove (11) having a rivet through hole;

the retainer ring (20) is positioned in the accommodating groove (11), the retainer ring (20) is arranged around the riveting through hole, two surfaces of the retainer ring (20) are respectively an abutting surface (21) and a riveting surface (22), and the abutting surface (21) is abutted to the bottom wall of the accommodating groove (11);

riveting seat (30), riveting seat (30) include main part (31) and set up riveting ring (32) on the terminal surface of main part (31), riveting seat (30) penetrate the riveting through-hole with retaining ring (20), the terminal surface of main part (31) is located butt face (21) with between riveting face (22), riveting ring (32) pass retaining ring (20) and with riveting face (22) riveting cooperation.

2. Piston assembly according to claim 1, characterized in that the bottom wall of the receiving groove (11) has a placement groove in which the collar (20) is located, the thickness of the collar (20) being greater than the depth of the placement groove.

3. The piston assembly of claim 1, wherein the inner diameter of the retainer ring (20) is D1, and the minimum inner diameter of the rivet through-hole is D2, D1 < D2.

4. The piston assembly of claim 3, wherein D1+1mm < D2.

5. The piston assembly of claim 1, further comprising a sealing pad (40), wherein the sealing pad (40) is sleeved on the riveting seat (30), one end of the sealing pad (40) is abutted against the riveting seat (30), and the other end of the sealing pad (40) is abutted against the outer wall of the piston (10).

6. Piston assembly according to claim 5, wherein the rivet through-hole comprises a first and a second interconnected bore section, the first bore section communicating with the receiving groove (11), the second bore section being located on a side of the first bore section facing away from the receiving groove (11), the second bore section having a radial dimension greater than the radial dimension of the first bore section, a portion of the sealing gasket (40) being arranged in the second bore section.

7. The piston assembly according to claim 6, characterized in that the main body (31) comprises a limiting cap (311), a limiting section (312) and a guide section (313) which are connected in sequence, the radial dimension of the limiting section (312) is larger than that of the guide section (313) and smaller than that of the limiting cap (311), the sealing gasket (40) is sleeved on the limiting section (312), the limiting section (312) is abutted against a piston (10) at the end face of the second hole section, the limiting cap (311) is abutted against the sealing gasket (40), the guide section (313) penetrates through the first hole section, the riveting ring (32) is arranged on one side of the guide section (313) deviating from the limiting section (312), and the riveting seat (30) is of an integral structure.

8. The piston assembly of claim 1, wherein said piston (10) includes a base plate (12) and an annular side wall (13) disposed about said base plate (12), an area between said base plate (12) and said annular side wall (13) forming said receiving groove (11), said rivet through hole being disposed on said bottom wall, said annular side wall (13) having an annular seal groove (14) disposed thereon, said piston assembly further comprising a seal ring (50), said seal ring (50) being disposed within said annular seal groove (14).

9. A solenoid valve, characterized in that the solenoid valve comprises a valve body part (60), a pilot valve (70) and a piston assembly of any one of claims 1 to 8, the valve body part (60) has a first passage (61), a second passage (62), a sliding chamber (63) and a pilot chamber (64), the sliding chamber (63) has a first valve port communicating with the first passage (61), the piston assembly is movably disposed in the sliding chamber (63) to close or open the first valve port, the pilot chamber (64) has a second valve port communicating with the second passage (62), the pilot valve (70) is partially disposed in the pilot chamber (64) to close or open the second valve port, the first passage (61) and the second passage (62) are in on-off communication through the first valve port, the first channel (61) is communicated with the sliding cavity (63), and the guide cavity (64) is communicated with the sliding cavity (63).

10. The electromagnetic valve according to claim 9, characterized in that the electromagnetic valve further comprises an elastic member (81) and a seat body (82), the seat body (82) is disposed in the accommodating groove (11) of the piston (10), and two ends of the elastic member (81) are respectively connected with the seat body (82) and the valve body component (60).