Piston guide structure, four-way valve and connecting method

Abstract

The invention provides a piston guide structure, a four-way valve and a connecting method, the piston guide structure comprises a guide frame, a piston component and a penetrating piece, and the guide frame is provided with a mounting structure; the piston component is mounted on the mounting structure; and the penetrating piece breaks through the piston component and the mounting structure and fixedly connects the piston component and the mounting structure. According to the scheme, the penetrating piece breaks down the piston component and the mounting structure, so that the piston component and the mounting structure are fixedly connected. The piston component and the mounting structure are punctured through the penetrating piece, so that rivet holes and screw holes in the prior art do not need to be formed in the piston component and the mounting structure, medium leakage is not prone to occurring, meanwhile, the connecting strength can be improved, the production procedure is simplified, and cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of valve structures, and in particular, to a piston guiding structure, a four-way valve, and a connection method. Background Art

[0002] In the prior art, the piston guiding structure is composed of a piston member and a guiding frame. The piston member is provided with a through hole, and the piston member and the guiding frame are connected together by screws. Among them, the piston member is formed by connecting the through holes of an outer baffle, a piston bowl, a toothed spring, and an inner baffle together by rivets. Due to the large number of parts and the long processing flow, there is a problem that the medium leaks at the rivets and screws when the pressure difference between the inner and outer surfaces of the piston exists. Summary of the Invention

[0003] The present invention provides a piston guiding structure, a four-way valve, and a connection method to solve the problem of medium leakage at the connection between the connecting member and the piston member and the guiding frame in the prior art.

[0004] To solve the above problems, according to one aspect of the present invention, the present invention provides a piston guiding structure, including a guiding frame, a piston member, and a penetrating member. The guiding frame has an installation structure; the piston member is installed in the installation structure; the penetrating member penetrates through the piston member and the installation structure, and the penetrating member fixedly connects the piston member and the installation structure.

[0005] Further, the penetrating member includes a stop section, a bonding section, and an impact section connected in sequence. The stop section abuts against the piston member, the bonding section is used for fixedly connecting with the guiding frame and the piston member, and the impact section is used for penetrating through the piston member and the installation structure.

[0006] Further, the bonding section includes a cylinder and at least one protrusion. The protrusions are distributed on the surface of the cylinder, and the protrusions are used to increase the friction between the penetrating member and the installation structure and the piston member.

[0007] Further, the cross-section of the protrusion is a wavy stripe, a chevron stripe, or an annular stripe, and the protrusion is inclined relative to the surface of the cylinder to form a barbed structure.

[0008] Further, the diameter of the cylinder is 0.2 - 1 times the thickness of the installation structure.

[0009] Further, the diameter of the stop section is greater than the diameter of the bonding section. The impact section is a conical structure. The diameter of the end of the impact section close to the bonding section is the same as the diameter of the bonding section, and the end of the impact section far from the bonding section is a tip.

[0010] Further, the penetrating member further includes a pressure-receiving section, which is connected to the end of the stop section far from the bonding section, and the pressure-receiving section is used to bear the pressure of the pressing device.

[0011] Further, the guide frame further includes a connecting frame, the mounting structure is arranged at the end of the connecting frame, the mounting structure includes at least one folding structure, the folding structure is perpendicular to the moving direction of the piston guiding structure, and the penetrating member penetrates through the folding structure.

[0012] Further, there are two mounting structures, the two mounting structures are respectively arranged at both ends of the connecting frame, there are two piston members, and the two piston members are respectively connected to one mounting structure.

[0013] Further, the piston member includes an outer baffle, a piston bowl, a toothed spring and an inner baffle stacked in sequence, and the piston member reciprocates synchronously with the guide frame.

[0014] Further, the outer baffle has micropores, the micropores are aligned with the position of the mounting structure, the micropores are square, circular or triangular, and the micropores are used for positioning the penetrating member.

[0015] Further, the outer baffle has a mounting hole, and the diameter of the mounting hole matches the diameter of the penetrating member.

[0016] Further, the penetrating member is a nail.

[0017] According to another aspect of the present invention, a four-way valve is provided, including a valve pipe and the above-mentioned piston guiding structure, and the piston guiding structure is arranged in the valve pipe so as to be movable back and forth.

[0018] According to still another aspect of the present invention, a connection method for the above-mentioned piston guiding structure is provided, including:

[0019] S10: Stack the outer baffle, the piston bowl, the toothed spring and the inner baffle in the piston member in sequence;

[0020] S20: Align the piston member with the mounting structure of the guide frame;

[0021] S30: Align the penetrating member with a predetermined position of the outer baffle;

[0022] S40: Use a device to apply pressure to make the penetrating member pass through the piston member and the mounting structure.

[0023] Applying the technical solution of the present invention, a piston guiding structure is provided, including a guide frame, a piston member and a penetrating member. The guide frame has a mounting structure; the piston member is mounted on the mounting structure; the penetrating member penetrates through the piston member and the mounting structure, and the penetrating member fixedly connects the piston member and the mounting structure. With this solution, the penetrating member penetrates through the piston member and the mounting structure, so that the piston member and the mounting structure are fixedly connected. With the arrangement that the penetrating member penetrates through the piston member and the mounting structure, the piston member and the mounting structure do not need to be provided with rivet holes and screw holes in the prior art, it is not easy to cause leakage of the medium, and at the same time, the connection strength can be improved, and the production process is also simplified and the cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which form a part of this application, are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0025] Figure 1 shows a schematic structural diagram of a piston guiding structure provided by an embodiment of the present invention;

[0026] Figure 2 shows Figure 1 a positioning schematic diagram of the piston guiding structure in

[0027] Figure 3 shows Figure 1 a schematic structural diagram of a penetrating member of the piston guiding structure in

[0028] Figure 4 shows Figure 3 a partial enlarged view of the penetrating member in

[0029] Figure 5 shows Figure 1 a schematic structural diagram of a guiding frame of the piston guiding structure in

[0030] Figure 6 shows Figure 1 a schematic structural diagram of a piston member of the piston guiding structure in

[0031] Figure 7 shows a partial schematic structural diagram of a four-way valve provided by an embodiment of the present invention.

[0032] Among them, the above-mentioned drawings include the following reference numerals:

[0033] 10, guiding frame; 11, mounting structure; 111, folding structure; 12, connecting frame;

[0034] 20, piston member; 21, outer baffle; 22, piston bowl; 23, toothed spring; 24, inner baffle;

[0035] 30, penetrating member; 31, stop section; 32, bonding section; 321, cylinder; 322, protrusion; 33, impact section; 34, compression section;

[0036] 40, valve pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way restricts the present invention and its application or use. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0038] As Figures 1 to 7 shown, an embodiment of the present invention provides a piston guiding structure, which includes a guiding frame 10, a piston member 20, and a penetrating member 30. The guiding frame 10 has an installation structure 11; the piston member 20 is installed on the installation structure 11; the penetrating member 30 penetrates through the piston member 20 and the installation structure 11, and the penetrating member 30 fixedly connects the piston member 20 and the installation structure 11.

[0039] With this solution, the penetrating member 30 penetrates through the piston member 20 and the installation structure 11, so that the piston member 20 and the installation structure 11 are fixedly connected. By using the arrangement that the penetrating member 30 penetrates through the piston member 20 and the installation structure 11, there is no need to provide rivet holes and screw holes in the prior art for the piston member 20 and the installation structure 11, and it is not easy to cause medium leakage. At the same time, the connection strength can be improved, and the production process is simplified and the cost is reduced.

[0040] As Figure 3 shown, the penetrating member 30 includes a stop section 31, a bonding section 32, and an impact section 33 that are connected in sequence. The stop section 31 abuts against the piston member 20, the bonding section 32 is used for fixedly connecting with the guiding frame 10 and the piston member 20, and the impact section 33 is used for penetrating through the piston member 20 and the installation structure 11.

[0041] With such an arrangement, the stop section 31 abuts against the piston member 20, so that the piston member 20 and the penetrating member 30 are mutually limited, preventing the piston member 20 from falling off. The bonding section 32 is used for fixedly connecting with the guiding frame 10 and the piston member 20, preventing the penetrating member 30 from having relative displacement with the guiding frame 10 and the piston member 20. The impact section 33 is arranged at the end of the penetrating member 30, and the impact section 33 is used for penetrating through the guiding frame 10 and the piston member 20.

[0042] In a specific embodiment of the present invention, the penetrating member 30 is made of an alloy material, such as stainless steel.

[0043] As Figure 3 shown, the bonding section 32 includes a column 321 and at least one protrusion 322. The protrusions 322 are distributed on the surface of the column 321, and the protrusions 322 are used to increase the friction between the penetrating member 30 and the installation structure 11 and the piston member 20.

[0044] With such a setting, the engaging section 32 includes a cylinder 321 and at least one protrusion 322. The protrusion 322 increases the friction between the piercing member 30 and the mounting structure 11 and the piston member 20, so that it is not easy for friction to occur between the piercing member 30 and the mounting structure 11 and the piston member 20. In a specific embodiment of the present invention, there are multiple protrusions 322, which are distributed circumferentially and axially on the cylinder 321 to increase the friction between the piercing member 30 and the mounting structure 11 and the piston member 20.

[0045] As Figure 3 shown, the cross-section of the protrusion 322 is a wavy stripe, a chevron stripe or an annular stripe, and the protrusion 322 is inclined relative to the surface of the cylinder 321 to form a barbed structure.

[0046] With such a setting, the cross-section of the protrusion 322 can be set as a wavy stripe, a chevron stripe or an annular stripe or other shapes to increase the friction between the protrusion 322 and the mounting structure 11 and the piston member 20. The protrusion 322 is inclined relative to the surface of the cylinder 321 to form a barbed structure. When relative displacement occurs between the piercing member 30 and the mounting structure 11 and the piston member 20, the barbs increase the friction and prevent relative displacement from occurring; for example, when the piercing member moves in the direction opposite to the piercing direction, the protrusion has a stopping effect to prevent the piercing member from falling off along the reverse direction; also for example, when the piercing member penetrates in place, if there is a tendency to rotate under the drive of an external force, the protrusion 322 can form a resistance with the pierced member to limit the rotation of the piercing member. In this way, the overall installation stability can be improved, and the fluid is not easy to leak.

[0047] Furthermore, the diameter of the cylinder 321 is 0.2 - 1 times the thickness of the mounting structure 11. With such a setting, the piercing member 30 can withstand sufficient strength and is not easy to break.

[0048] As Figure 3 shown, the diameter of the stopping section 31 is greater than the diameter of the engaging section 32, and the impact section 33 is a conical structure. The diameter of the end of the impact section 33 close to the engaging section 32 is the same as the diameter of the engaging section 32, and the end of the impact section 33 far from the engaging section 32 is a tip.

[0049] With such a setting, the diameter of the stopping section 31 is greater than the diameter of the engaging section 32, so that the stopping section 31 can be in stop cooperation with the piston member 20. The impact section 33 is a conical structure, and the tip of the impact section 33 can pierce through the piston member 20 and the mounting structure 11, so that the piercing member 30 can penetrate through the piston member 20 and the mounting structure 11.

[0050] As Figure 3 shown, the piercing member 30 further includes a pressure-receiving section 34. The pressure-receiving section 34 is connected to the end of the stopping section 31 far from the engaging section 32, and the pressure-receiving section 34 is used to receive the pressure of the pressing device.

[0051] With such a setting, the compression section 34 is arranged at one end of the penetrating member 30 that is under pressure. The compression section 34 is subjected to the pressure of the device, piercing through the piston member 20 and the mounting structure 11.

[0052] As Figure 5 shown, the guide frame 10 further includes a connecting frame 12. The mounting structure 11 is arranged at the end of the connecting frame 12. The mounting structure 11 includes at least one folding structure 111. The folding structure 111 is perpendicular to the moving direction of the piston guiding structure, and the penetrating member 30 pierces through the folding structure 111.

[0053] With such a setting, the guide frame 10 further includes a connecting frame 12. The mounting structure 11 is arranged at the end of the connecting frame 12. The mounting structure 11 includes at least one folding structure 111. The folding structure 111 is connected to the piston member 20 through the penetrating member 30. In a specific embodiment of the present invention, there are two folding structures 111. The adjacent folding structures 111 are arranged at 180°. Each folding structure 111 penetrates into a penetrating member 30, which increases the connection strength.

[0054] As Figure 2 shown, there are two mounting structures 11. The two mounting structures 11 are respectively arranged at both ends of the connecting frame 12. There are two piston members 20. The two piston members 20 are respectively connected to one mounting structure 11.

[0055] With such a setting, there are two mounting structures 11. The two mounting structures 11 are respectively arranged at both ends of the connecting frame 12. Both ends of the connecting frame 12 are respectively connected to a piston member 20, enabling the piston guiding structure to reciprocate within the valve tube 40.

[0056] As Figure 6 shown, the piston member 20 includes an outer baffle 21, a piston bowl 22, a toothed spring 23, and an inner baffle 24 that are stacked in sequence. The piston member 20 reciprocates synchronously with the guide frame 10.

[0057] With such a setting, the piston member 20 includes an outer baffle 21, a piston bowl 22, a toothed spring 23, and an inner baffle 24 that are stacked in sequence. After the outer baffle 21, the piston bowl 22, the toothed spring 23, and the inner baffle 24 are stacked in sequence, the penetrating member 30 penetrates through the outer baffle 21, the piston bowl 22, the toothed spring 23, and the inner baffle 24, not only realizing the connection of multiple parts in the piston member 20, but also enabling the piston member 20 to be connected to the mounting structure 11. In this way, it is not necessary to connect multiple parts in the piston member 20 first, simplifying the process and cost.

[0058] In a specific embodiment of the present invention, the outer baffle 21, the toothed spring 23, and the inner baffle 24 are made of stainless steel, and the piston bowl 22 is made of plastic.

[0059] Optionally, in a specific embodiment of the present invention, the outer baffle 21 has micropores, the micropores are aligned with the position of the mounting structure 11, the micropores are square, circular or triangular, and the micropores are used for positioning the penetrating member 30.

[0060] With such a setting, the outer baffle 21 has micropores, which can position the penetrating member 30 and avoid deviation in the installation of the penetrating member 30. The micropores can be set to be square, circular or triangular, or other shapes that are beneficial to installation.

[0061] Optionally, in a specific embodiment of the present invention, the outer baffle 21 has a mounting hole, and the diameter of the mounting hole matches the diameter of the penetrating member 30.

[0062] With such a setting, a mounting hole is provided in the outer baffle 21, so that the diameter of the mounting hole matches the diameter of the penetrating member 30, avoiding leakage of the medium at the mounting hole. At the same time, due to the provision of the mounting hole, it is easier for the penetrating member 30 to penetrate the piston member 20, reducing the processing difficulty.

[0063] In a specific embodiment of the present invention, the penetrating member 30 is a nail. With such a setting, using a nail as the penetrating member 30 is convenient for operation and saves costs.

[0064] According to another aspect of the present invention, a four-way valve is provided, which includes a valve tube 40 and the above-mentioned piston guiding structure, and the piston guiding structure is disposed in the valve tube 40 so as to be movable back and forth. With such a setting, the piston guiding structure can reciprocate in the valve tube 40 and avoid leakage of the medium.

[0065] According to still another aspect of the present invention, a connection method for the above-mentioned piston guiding structure is provided, including:

[0066] S10: Stack the outer baffle 21, the piston bowl 22, the toothed spring 23 and the inner baffle 24 in the piston member 20 in sequence;

[0067] S20: Align the piston member 20 with the mounting structure 11 of the guiding frame 10;

[0068] S30: Align the penetrating member 30 with a predetermined position of the outer baffle 21;

[0069] S40: Use a device to apply pressure to pass the penetrating member 30 through the piston member 20 and the mounting structure 11.

[0070] With such a setting, the outer baffle 21, piston bowl 22, toothed spring 23 and inner baffle 24 in the piston member 20 are stacked together in sequence, achieving the positioning of the piston member 20. The installation structure 11 of the piston member 20 and the guide frame 10 are corresponded to determine the relative positions of the piston member 20 and the installation structure 11. The penetrator 30 is aligned with a predetermined position of the outer baffle 21, and then a pressure is applied by a device to pass the penetrator 30 through the piston member 20 and the installation structure 11, so that the penetrator 30 fixedly connects the piston member 20 and the installation structure 11.

[0071] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, various changes and modifications can be made to the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

[0072] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0073] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps described in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the specification. In all the examples shown and discussed here, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0074] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by orientation terms such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom", etc. is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description. Without contrary description, these orientation terms do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present invention; the orientation terms "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0075] For the sake of convenience in description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "above-mentioned" etc. can be used here to describe the spatial positional relationship between a device or feature shown in the drawings and other devices or features. It should be understood that the spatial relative terms are intended to cover different orientations in use or operation in addition to the orientation described in the drawings for the device. For example, if the device in the drawing is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned as "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above..." can include both the orientations of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the corresponding explanations are made for the spatial relative descriptions used here.

[0076] In addition, it should be noted that the use of words such as "first", "second", etc. to limit components is only for the convenience of distinguishing the corresponding components. Without additional statement, the above-mentioned words have no special meaning. Therefore, it should not be construed as a limitation on the protection scope of the present invention.

Claims

1. A piston guiding structure, characterized in that, it includes: a guiding frame (10), and the guiding frame (10) has an installation structure (11); a piston member (20), and the piston member (20) is installed on the installation structure (11); a penetrating member (30), the penetrating member (30) penetrates through the piston member (20) and the installation structure (11), and the penetrating member (30) fixedly connects the piston member (20) and the installation structure (11).

2. The piston guiding structure according to claim 1, characterized in that, the penetrating member (30) includes a stop section (31), a bonding section (32) and an impact section (33) connected in sequence, the stop section (31) abuts against the piston member (20), the bonding section (32) is used for fixedly connecting with the guiding frame (10) and the piston member (20), and the impact section (33) is used for penetrating through the piston member (20) and the installation structure (11).

3. The piston guiding structure according to claim 2, characterized in that, the bonding section (32) includes a cylinder (321) and at least one protrusion (322), the protrusions (322) are distributed on the surface of the cylinder (321), and the protrusions (322) are used to increase the friction between the penetrating member (30) and the installation structure (11) and the piston member (20).

4. The piston guiding structure according to claim 3, characterized in that, the cross-section of the protrusion (322) is a wavy stripe, a chevron stripe or an annular stripe, and the protrusion (322) is inclined relative to the surface of the cylinder (321) to form a barb structure.

5. The piston guiding structure according to claim 3, characterized in that, the diameter of the cylinder (321) is 0.2 - 1 times the thickness of the installation structure (11).

6. The piston guiding structure according to claim 2, characterized in that, the diameter of the stop section (31) is larger than the diameter of the bonding section (32), the impact section (33) is a conical structure, the diameter of the end of the impact section (33) close to the bonding section (32) is the same as the diameter of the bonding section (32), and the end of the impact section (33) far from the bonding section (32) is a tip.

7. The piston guiding structure according to claim 2, characterized in that, the penetrating member (30) further includes a pressure-receiving section (34), the pressure-receiving section (34) is connected to the end of the stop section (31) far from the bonding section (32), and the pressure-receiving section (34) is used to bear the pressure of the pressing device.

8. The piston guiding structure according to claim 1, characterized in that, the guiding frame (10) further includes a connecting frame (12), the installation structure (11) is arranged at the end of the connecting frame (12), the installation structure (11) includes at least one folding structure (111), the folding structure (111) is perpendicular to the moving direction of the piston guiding structure, and the penetrating member (30) penetrates through the folding structure (111).

9. The piston guiding structure according to claim 8, wherein, there are two of the mounting structures (11), the two mounting structures (11) are respectively arranged at two ends of the connecting frame (12), there are two of the piston members (20), and the two piston members (20) are respectively connected to one of the mounting structures (11).

10. The piston guiding structure according to claim 1, wherein, the piston member (20) includes an outer baffle (21), a piston bowl (22), a toothed spring (23) and an inner baffle (24) stacked in sequence, and the piston member (20) reciprocates synchronously with the guiding frame (10).

11. The piston guiding structure according to claim 10, wherein, the outer baffle (21) has micropores, the positions of the micropores are aligned with the mounting structure (11), the micropores are square, circular or triangular, and the micropores are used for positioning the penetrating member (30).

12. The piston guiding structure according to claim 10, wherein, the outer baffle (21) has mounting holes, and the diameter of the mounting holes matches the diameter of the penetrating member (30).

13. The piston guiding structure according to claim 1, wherein, the penetrating member (30) is a nail.

14. A four-way valve, wherein, it includes a valve pipe (40) and the piston guiding structure according to any one of claims 1 to 13, and the piston guiding structure is movably arranged in the valve pipe (40) in a reciprocating manner.

15. A connection method, wherein, it is used for the piston guiding structure according to any one of claims 1 to 13, and includes: S10: Stack the outer baffle (21), the piston bowl (22), the toothed spring (23) and the inner baffle (24) in the piston member (20) in sequence; S20: Align the piston member (20) with the mounting structure (11) of the guiding frame (10); S30: Align the penetrating member (30) with a predetermined position of the outer baffle (21); S40: Use equipment to apply pressure to pass the penetrating member (30) through the piston member (20) and the mounting structure (11).

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