Quickly-assembled flushing valve

Abstract

The utility model provides a fast-assembly type flushing valve, and belongs to the technical field of valves, the fast-assembly type flushing valve comprises a valve body, a main valve assembly and a pilot valve assembly, the valve body is provided with a main valve cavity and an auxiliary valve cavity, the main valve assembly is installed in the main valve cavity, and the pilot valve assembly is integrated and is in threaded connection with the auxiliary valve cavity; the pilot valve assembly of the flushing valve can be assembled into a whole in advance and then is directly connected with the auxiliary valve cavity of the valve body through the threads, the operation difficulty of later maintenance, repair and replacement of the flushing valve is reduced, and particularly when the flushing valve is installed in a space-limited place, the flushing valve is convenient to maintain and replace. And a user can quickly mount and dismount the pilot valve assembly by using a single hand.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a quick-install flush valve. Background Art

[0002] Flush valves, usually installed in sanitary ware equipment, are valves used to control water flow to clean sanitary ware. The main function of a flush valve is to ensure that the right amount of water is released during each flushing process, which can both effectively clean and save water resources. Early manual flush valves achieved flushing through simple mechanical operations, but with technological advances, pressure-assisted and induction flush valves have become increasingly popular. These technologies use water pressure to enhance the flushing effect, or automatically control flushing through infrared sensing, greatly improving sanitary conditions and water resource utilization efficiency.

[0003] Solenoid valves are automation components that use electromagnetic principles to control valve opening and closing, and are widely used in industrial control systems. Common solenoid valves mainly include a valve body, a valve cover connected to the valve body, a diaphragm assembly arranged in the valve body, and an electromagnetic head for driving the diaphragm assembly to move. The valve body is provided with a water inlet, a water outlet, and a valve port for connecting the water inlet and the water outlet. The diaphragm assembly can open or close the valve port under the drive of the electromagnetic head, thereby realizing the opening and closing of the valve.

[0004] A commonly used flush valve includes a valve body, on which a pilot valve and a main valve are arranged, wherein the pilot valve mainly adopts a solenoid valve, and the pilot valve controls an auxiliary circuit. Generally, the auxiliary circuit needs to be opened before the main valve can be opened. During the use of this flush valve, the pilot valve is prone to failure and needs to be repaired and replaced. However, since the pilot valve is mostly connected to the valve body by bolts and is installed in a place with limited space, such as under a washbasin, behind a toilet, or in a bathroom wall, etc., it is difficult to repair and replace the pilot valve. Utility Model Content

[0005] The purpose of the utility model is to overcome the shortcomings and deficiencies of the prior art and to provide a quick-install flush valve.

[0006] The technical solution adopted by the utility model is as follows: The application provides a quick-install flush valve, including a valve body, a main valve assembly and a pilot valve assembly, the valve body is provided with a main valve cavity and a secondary valve cavity, the main valve assembly is installed in the main valve cavity, the pilot valve assembly is integrated and is connected to the secondary valve cavity by a thread.

[0007] In some embodiments, the pilot valve assembly includes an electromagnetic head, an auxiliary valve cover, an auxiliary valve seat, an auxiliary diaphragm and an auxiliary spring. The electromagnetic head, auxiliary valve cover and auxiliary valve seat are connected in sequence. The edge of the auxiliary diaphragm is pressed between the auxiliary valve cover and the auxiliary valve seat. The auxiliary spring is pressed between the auxiliary valve cover and the auxiliary diaphragm. A first threaded connection portion is provided on the auxiliary valve seat, and a second threaded connection portion compatible with the first threaded connection portion is provided in the auxiliary valve cavity.

[0008] In some embodiments, a pressure regulating chamber is formed between the auxiliary diaphragm and the auxiliary valve cover, and a receiving chamber is formed between the auxiliary diaphragm and the auxiliary valve seat. A plurality of first water inlets are circumferentially arranged on the side wall of the auxiliary valve seat and are all communicated with the receiving chamber. A first water outlet is axially arranged on the auxiliary valve seat and is communicated with the receiving chamber. A valve seat portion is arranged at the upper end of the first water outlet, and the valve seat portion can abut against the auxiliary diaphragm to form a sealing fit, so that the first water outlet is separated from the receiving chamber. A pilot hole is arranged between the first water outlet and the pressure regulating chamber, and the electromagnetic head includes a plug, and the plug has a first position for closing the pilot hole and a second position for opening the pilot hole.

[0009] In some embodiments, a through hole is provided on the auxiliary diaphragm, a pilot column portion is provided on the auxiliary valve cover facing the through hole, the pilot hole is arranged axially along the pilot column portion, the outer diameter of the pilot column portion is smaller than the inner diameter of the through hole and its lower end passes through the through hole, and sealing convex rings are provided on the upper side and the lower side of the inner wall of the through hole facing the pilot column portion, and the sealing convex ring is in contact with the pilot column portion.

[0010] In some embodiments, the portion where the sealing convex ring abuts against the pilot column portion is arranged at a sharp angle.

[0011] In some embodiments, the auxiliary valve cavity includes a first circular groove portion, a second circular groove portion, a third circular groove portion and a fourth circular groove portion, the second threaded connection portion is arranged on the inner wall of the fourth circular groove portion, a first sealing ring is arranged between the auxiliary valve seat and the first circular groove portion, a second sealing ring is arranged between it and the third circular groove portion, and the side wall of the second circular groove portion is provided with an auxiliary circuit connected to the first water inlet.

[0012] In some embodiments, the auxiliary valve seat includes a first groove portion and a second groove portion, the auxiliary diaphragm includes a fixed portion, a deformation portion and a valve core portion, the auxiliary valve cover is provided with a pressing portion facing the second groove portion, the fixed portion is pressed between the second groove portion and the pressing portion, and the valve core portion is located in the first groove portion and is sealed with the valve seat portion.

[0013] In some embodiments, a balancing hole is provided on the auxiliary diaphragm, the balancing hole connects the pressure regulating chamber and the first water inlet, a needle portion extends from the upper end of the auxiliary spring, and the needle portion is axially slidably arranged along the balancing hole.

[0014] In some embodiments, a sealed cavity is provided between the auxiliary valve cover and the electromagnetic head, the pilot hole connects the sealed cavity and the first water outlet, a connecting hole is provided on the bottom wall of the sealed cavity, and the connecting hole connects the sealed cavity and the pressure regulating cavity.

[0015] In some embodiments, a truncated cone-shaped sealing portion is provided on the pilot column portion near the plug, and the plug can abut against the sealing portion to form a sealing fit.

[0016] The beneficial effects of the present invention are as follows: the pilot valve assembly of the flush valve in the present invention can be pre-assembled as an integral whole and then directly connected to the auxiliary valve chamber of the valve body through threads, thereby reducing the difficulty of later maintenance, repair and replacement of the flush valve. Especially when the flush valve is installed in a place with limited space, the user can quickly install and disassemble the pilot valve assembly using only one hand. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the utility model.

[0018] Figure 1 It is an exploded view of a quick-install flush valve in the utility model;

[0019] Figure 2 This is an exploded cross-sectional view of a quick-install flush valve in the utility model. Figure 1 ;

[0020] Figure 3 This is an exploded cross-sectional view of a quick-install flush valve in the utility model. Figure 2 ;

[0021] Figure 4 It is a cross-sectional view of the pilot valve assembly in the utility model;

[0022] Figure 5 It is a partial exploded view of a quick-install flush valve in the utility model;

[0023] Figure 6 A partial schematic diagram of a quick-install flush valve in the utility model Figure 1 ;

[0024] Figure 7 A partial schematic diagram of a quick-install flush valve in the utility model Figure 2 ;

[0025] Figure 8It is a cross-sectional view of a quick-install flush valve in the utility model. DETAILED DESCRIPTION

[0026] The following description provides specific application scenarios and requirements of this specification, with the purpose of enabling those skilled in the art to make and use the contents of this specification. Various local modifications to the disclosed embodiments will be apparent to those skilled in the art, and the general principles defined herein may be applied to other embodiments and applications without departing from the spirit and scope of this specification. Therefore, this specification is not limited to the embodiments shown, but to the widest scope consistent with the claims.

[0027] In the description of the present application, it should be noted that, unless otherwise expressly specified and limited, the terms "longitudinal", "transverse", "radial", "length", "width", "thickness", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. These terms are mainly for better describing the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0028] Secondly, the terms "first", "second" and similar words do not indicate any order, quantity or importance, but are only used to distinguish different components and should not be understood as limitations on the embodiments of the present application.

[0029] In addition, the terms "installed", "set", "provided with", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements or components.

[0030] For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0031] Regarding the drawings of the present application, it should be clearly understood that the drawings are for illustration and description purposes only and are not intended to limit the scope of the present specification. It should also be understood that the drawings are not drawn to scale.

[0032] Embodiment 1:

[0033] like Figures 1 to 8As shown, the present embodiment provides a quick-install flush valve, comprising a valve body 1, a main valve assembly 2 and a pilot valve assembly 3. The valve body 1 is provided with a main valve chamber 100 and a secondary valve chamber 101. The main valve assembly 2 is installed in the main valve chamber 100. The pilot valve assembly 3 is integrated and connected to the secondary valve chamber 101 by threads. Specifically, the pilot valve assembly 3 can be pre-assembled into one piece and then directly connected to the secondary valve chamber 101 of the valve body 1 by threads, which reduces the difficulty of later maintenance, repair and replacement of the flush valve. Especially when the flush valve is installed in a place with limited space, the user can quickly install and disassemble the pilot valve assembly using only one hand.

[0034] The valve body 1 is provided with a main flow channel 102 , the main valve chamber 100 and the auxiliary valve chamber 101 are arranged above the main flow channel 102 and are connected thereto, a first flow channel opening 103 is arranged between the main flow channel and the main valve chamber 100 , and a second flow channel opening 104 is arranged between the main flow channel and the auxiliary valve chamber 101 .

[0035] Among them, the pilot valve assembly 3 includes an electromagnetic head 30, an auxiliary valve cover 31, an auxiliary valve seat 32, an auxiliary diaphragm 33 and an auxiliary spring 34. The electromagnetic head 30, the auxiliary valve cover 31 and the auxiliary valve seat 32 are connected in sequence, and the edge of the auxiliary diaphragm 33 is pressed between the auxiliary valve cover 31 and the auxiliary valve seat 32, and the auxiliary spring 34 is pressed between the auxiliary valve cover 31 and the auxiliary diaphragm 33, so as to form an integrated pilot valve assembly 3. Compared with the pilot valve assembly in the prior art, generally, several parts are installed in the auxiliary valve cavity 101 in sequence, and finally locked and fixed by multiple bolts. Not only is it troublesome to disassemble and assemble, but it is also inconvenient to repair and replace later. Especially in installation places with limited space, it is difficult to install springs, bolts, etc. in the pilot valve assembly. On the other hand, in this embodiment, a first threaded connection portion 320 is provided on the auxiliary valve seat 32 , a second threaded connection portion 1010 matched with the first threaded connection portion 320 is provided in the auxiliary valve cavity 101 , and the pilot valve assembly 3 is an integral component directly threadedly connected to the auxiliary valve cavity 101 .

[0036] Secondly, a pressure regulating chamber 35 is formed between the auxiliary diaphragm 33 and the auxiliary valve cover 31, and a receiving chamber 36 is formed between the auxiliary diaphragm 33 and the auxiliary valve seat 32. A plurality of first water inlets 321 are circumferentially arranged on the side wall of the auxiliary valve seat 32 and are all communicated with the receiving chamber 36. A first water outlet 322 is axially arranged on the auxiliary valve seat and is communicated with the receiving chamber 36. A valve seat portion 323 is arranged at the upper end of the first water outlet 322. The valve seat portion 323 can abut against the auxiliary diaphragm 33 to form a sealing fit, so that the first water outlet 322 is separated from the receiving chamber 36. A pilot hole 37 is arranged between the first water outlet 322 and the pressure regulating chamber 35. The electromagnetic head 30 includes a plug 300, and the plug 300 has a first position of closing the pilot hole 37 and a second position of opening the pilot hole 37. The electromagnetic head 30 adopts the electromagnetic principle to control the up and down movement of the plug 300, so as to realize the closing of the pilot hole 37 or the opening of the pilot hole 37.

[0037] Secondly, a through hole 330 is provided on the auxiliary diaphragm 33, and a pilot column portion 310 is provided on the auxiliary valve cover 31 facing the through hole 330. The pilot hole 37 is arranged axially along the pilot column portion 310. The outer diameter of the pilot column portion 310 is smaller than the inner diameter of the through hole 330 and its lower end passes through the through hole 330. The upper side and the lower side of the inner wall of the through hole 330 are both provided with a sealing convex ring 331 facing the pilot column portion 310. The sealing convex ring 331 abuts against the pilot column portion 310 to form a sealing fit. Specifically, the portion where the sealing convex ring 331 abuts against the pilot column portion 310 is arranged at a sharp angle. In the present embodiment, the cross section of the sealing convex ring 331 is triangular, and its tip abuts against the pilot column portion 310, so that the resistance of the auxiliary diaphragm 33 to opening and closing can be reduced.

[0038] It should be understood that the main valve assembly 2 can adopt a variety of structures. In this embodiment, the main valve assembly 2 includes a main valve cover 20, a main valve seat 21, a main diaphragm 22, a sealing ring 23 and a main spring 24. The main valve seat 21 is arranged at the first flow channel opening 103. The main diaphragm 22 is slidably arranged up and down along the main valve cavity 100. A balance cavity 25 is formed between it and the main valve cover 20, and a cavity 26 is formed between it and the main valve cavity 100. The sealing ring 23 and the inner wall of the main valve cavity 100 are The main diaphragm 22 forms a seal, thereby isolating the balance chamber 25 from the cavity 26. A main valve core 27 is provided on the main diaphragm 22 toward the main valve seat 21. The main valve core 27 slides up and down along the main valve chamber 100 to form a seal with the main valve seat 21. The main spring 24 is pressed between the main valve cover 20 and the main diaphragm 22. The main valve assembly 2 also includes a filter ring 28. The upper end of the filter ring 28 abuts against the main diaphragm 22, and the lower end thereof abuts against the main valve seat 21.

[0039] Secondly, an auxiliary circuit 47 is arranged between the main valve assembly 2 and the pilot valve assembly 3. The auxiliary circuit 47 connects the main valve chamber 100 and the auxiliary valve chamber 101. Specifically, the auxiliary circuit 47 connects the balance chamber 25 and the containing chamber 36. The main valve assembly 2 is controlled by the pilot valve assembly 3. Usually, the pilot valve assembly 3 needs to be opened before the main valve assembly 2 can be opened.

[0040] Furthermore, the auxiliary valve chamber 101 includes a first circular groove portion 41, a second circular groove portion 42, a third circular groove portion 43 and a fourth circular groove portion 44. The circular groove structure will not affect the disassembly and assembly of the first threaded connection portion 320 and the second threaded connection portion 1010. The second threaded connection portion 1010 is arranged on the inner wall of the fourth circular groove portion 44. A first sealing ring 45 is arranged between the auxiliary valve seat 32 and the first circular groove portion 41, and a second sealing ring 46 is arranged between it and the third circular groove portion 43. The auxiliary circuit 47 is arranged on the side wall of the second circular groove portion 42 and is connected to the first water inlet 321. The two sealing rings ensure that the first water inlet 321 is isolated from the first water outlet 322 to avoid water leakage.

[0041] Secondly, the auxiliary valve seat 32 includes a first groove portion 3201 and a second groove portion 3202, the auxiliary diaphragm 33 includes a fixed portion 3301, a deformation portion 3302 and a valve core portion 3303, and the auxiliary valve cover 31 is provided with a pressing portion 3100 facing the second groove portion 3202, the fixed portion 3301 is pressed between the second groove portion 3202 and the pressing portion 3100, and the valve core portion 3303 is located in the first groove portion 3201 and is sealed with the valve seat portion 323, thereby ensuring the isolation between the pressure regulating chamber 35 and the receiving chamber 36.

[0042] Furthermore, a balancing hole 50 is provided on the auxiliary diaphragm 33, and the balancing hole 50 connects the pressure regulating chamber 35 and the first water inlet 321. When the pilot valve assembly is closed, the medium of the first water inlet 321 can flow into the pressure regulating chamber 35 through the balancing hole 50, thereby relieving pressure. A needle portion 340 is extended from the upper end of the auxiliary spring 34, and the needle portion 340 is axially slidably arranged along the balancing hole 50, that is, there is a gap between the needle portion 340 and the balancing hole 50. When the valve core portion 3303 moves, the needle portion 340 follows the telescopic action of the auxiliary spring 34 and slides axially along the balancing hole 50, thereby clearing and cleaning the balancing hole 50.

[0043] Furthermore, a sealed cavity 38 is provided between the auxiliary valve cover 31 and the electromagnetic head 30, the pilot hole 37 connects the sealed cavity 38 with the first water outlet 322, a connecting hole 380 is provided on the bottom wall of the sealed cavity 38, the connecting hole 380 connects the sealed cavity 38 with the pressure regulating cavity 35, and there are multiple connecting holes 380, which are evenly arranged circumferentially with the pilot hole 37 as the center.

[0044] Secondly, a truncated cone-shaped sealing portion 3101 is provided on the guide column portion 310 near the plug 300. The plug 300 can abut against the sealing portion 3101 to form a sealed fit. The area of ​​the sealing end of the plug 300 is larger than the area of ​​the sealing end of the sealing portion 3101. The truncated cone-shaped sealing portion 3101 can form a more reliable seal when the plug 300 abuts against the sealing portion 3101.

[0045] In summary, after reading this detailed disclosure, those skilled in the art will appreciate that the foregoing detailed disclosure may be presented only by way of example and may not be restrictive. Although not explicitly stated herein, those skilled in the art will appreciate that the requirements of this application encompass various reasonable changes, improvements and modifications to the embodiments. These changes, improvements and modifications are intended to be proposed by the present application and are within the spirit and scope of the exemplary embodiments of the present application.

[0046] In addition, it should be understood that in the foregoing description of the embodiments of the present application, in order to help understand a feature and for the purpose of simplifying the present application, the present application combines various features in a single embodiment, drawing or its description. However, this does not mean that the combination of these features is necessary. When reading the present application, it is entirely possible for a person skilled in the art to mark out a part of the devices as a separate embodiment. In other words, the embodiments in the present application can also be understood as the integration of multiple secondary embodiments. This is also true when the content of each secondary embodiment is less than all the features of a single aforementioned disclosed embodiment.

[0047] Finally, it should be understood that the embodiments of the application disclosed herein are explanations of the principles of the embodiments of the present application. Other modified embodiments are also within the scope of the present application. Therefore, the embodiments disclosed in the present application are merely examples and not limitations. Those skilled in the art can adopt alternative configurations according to the embodiments in the present application to implement the application in the present application. Therefore, the embodiments of the present application are not limited to the embodiments accurately described in the application.

Claims

1. A quick-install flush valve, comprising a valve body (1), a main valve assembly (2) and a pilot valve assembly (3), wherein the valve body (1) is provided with a main valve chamber (100) and a secondary valve chamber (101), and the main valve assembly (2) is installed in the main valve chamber (100), characterized in that: The pilot valve assembly (3) is integral and connected to the auxiliary valve chamber (101) via threads.

2. A quick-install flush valve according to claim 1, characterized in that: The pilot valve assembly (3) comprises an electromagnetic head (30), an auxiliary valve cover (31), an auxiliary valve seat (32), an auxiliary diaphragm (33) and an auxiliary spring (34); the electromagnetic head (30), the auxiliary valve cover (31) and the auxiliary valve seat (32) are connected in sequence; the edge of the auxiliary diaphragm (33) is pressed between the auxiliary valve cover (31) and the auxiliary valve seat (32); the auxiliary spring (34) is pressed between the auxiliary valve cover (31) and the auxiliary diaphragm (33); a first threaded connection portion (320) is provided on the auxiliary valve seat (32); and a second threaded connection portion (1010) matched with the first threaded connection portion (320) is provided in the auxiliary valve cavity (101).

3. A quick-install flush valve according to claim 2, characterized in that: A pressure regulating cavity (35) is formed between the auxiliary diaphragm (33) and the auxiliary valve cover (31), and a receiving cavity (36) is formed between the auxiliary diaphragm (33) and the auxiliary valve seat (32). The auxiliary valve seat (32) is provided with a plurality of first water inlets (321) along the circumferential direction of the side wall and all of them are connected to the receiving cavity (36), and a first water outlet (322) is provided along the axial direction thereof and is connected to the receiving cavity (36). A valve seat is provided at the upper end of the first water outlet (322). The valve seat portion (323) can abut against the auxiliary diaphragm (33) to form a sealing fit, so that the first water outlet (322) is separated from the chamber (36), a pilot hole (37) is provided between the first water outlet (322) and the pressure regulating chamber (35), and the electromagnetic head (30) includes a plug (300), and the plug (300) has a first position for closing the pilot hole (37) and a second position for opening the pilot hole (37).

4. A quick-install flush valve according to claim 3, characterized in that: The auxiliary diaphragm (33) is provided with a through hole (330), the auxiliary valve cover (31) is provided with a pilot column portion (310) facing the through hole (330), the pilot hole (37) is arranged along the axial direction of the pilot column portion (310), the outer diameter of the pilot column portion (310) is smaller than the inner diameter of the through hole (330), and the lower end thereof passes through the through hole (330), and the upper side and the lower side of the inner wall of the through hole (330) are both provided with sealing convex rings (331) facing the pilot column portion (310), and the sealing convex ring (331) is in contact with the pilot column portion (310).

5. A quick-install flush valve according to claim 4, characterized in that: The portion where the sealing convex ring (331) abuts against the pilot column portion (310) is arranged at a sharp angle.

6. A quick-install flush valve according to claim 2, characterized in that: The auxiliary valve chamber (101) includes a first circular groove portion (41), a second circular groove portion (42), a third circular groove portion (43) and a fourth circular groove portion (44); the second threaded connection portion (1010) is arranged on the inner wall of the fourth circular groove portion (44); a first sealing ring (45) is arranged between the auxiliary valve seat (32) and the first circular groove portion (41); a second sealing ring (46) is arranged between the auxiliary valve seat (32) and the third circular groove portion (43); and the side wall of the second circular groove portion (42) is provided with an auxiliary circuit (47) connected to the first water inlet (321).

7. The quick-install flush valve according to claim 3, characterized in that: The auxiliary valve seat (32) includes a first groove portion (3201) and a second groove portion (3202), the auxiliary diaphragm (33) includes a fixed portion (3301), a deformation portion (3302) and a valve core portion (3303), the auxiliary valve cover (31) is provided with a pressing portion (3100) facing the second groove portion (3202), the fixed portion (3301) is pressed between the second groove portion (3202) and the pressing portion (3100), and the valve core portion (3303) is located in the first groove portion (3201) and is sealed with the valve seat portion (323).

8. The quick-install flush valve according to claim 3, characterized in that: The auxiliary diaphragm (33) is provided with a balancing hole (50), the balancing hole (50) is connected with the pressure regulating chamber (35) and the first water inlet (321), and the upper end of the auxiliary spring (34) is extended with a needle portion (340), and the needle portion (340) is axially slidably arranged along the balancing hole (50).

9. The quick-install flush valve according to claim 4, characterized in that: A sealed cavity (38) is provided between the auxiliary valve cover (31) and the electromagnetic head (30); the pilot hole (37) communicates the sealed cavity (38) with the first water outlet (322); a communicating hole (380) is provided on the bottom wall of the sealed cavity (38); and the communicating hole (380) communicates the sealed cavity (38) with the pressure regulating cavity (35).

10. The quick-install flush valve according to claim 9, characterized in that: A truncated cone-shaped sealing portion (3101) is provided on the pilot column portion (310) near the plug (300), and the plug (300) can abut against the sealing portion (3101) to form a sealing fit.

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