Valve and system comprising same

Abstract

The utility model provides a valve and a system comprising the same, and belongs to the technical field of tunnel construction equipment. The valve comprises a valve shell, a valve cavity is formed in the valve shell, a valve element is rotatably arranged in the valve cavity, a rotary sealing assembly is arranged at the position, located at the rotating fit position of the valve shell and the valve element, outside the valve cavity, and the rotary sealing assembly at least comprises a bearing or a shaft sleeve which is arranged around the rotating axis of the valve element. When the valve element rotates, fluid can be prevented from leaking out of the valve shell from the valve cavity. By additionally arranging the rotary sealing assembly with the bearing or the shaft sleeve, on one hand, the rotating stability of the valve element is improved, and the abrasion of the sealing ring is reduced, and on the other hand, through the combination of soft sealing and hard sealing, the sealing performance is improved, and the service life of the valve is ensured; besides, the concrete is sealed and limited between the two sealing parts at the valve core main body part, so that the abrasion of the valve core main body during rotation can be reduced, the rotating torsion required during reversing is reduced, and the service life of the valve is prolonged.

Description

Technical Field

[0001] This utility model belongs to the technical field of tunnel construction equipment, specifically relating to a valve and a system containing the same. Background Technology

[0002] Tunnel concrete pouring is a crucial step in tunnel construction, primarily used for tunnel support structures and lining to ensure tunnel stability and durability. In recent years, to improve the efficiency of tunnel concrete pouring, reduce waste concrete generation, and optimize construction procedures, a grouting system using a three-way reversing valve grouting device and concrete conduit has been proposed. Representative technologies for this include patent application JP2021195789A (hereinafter referred to as Document 1) filed by the Japanese company Kajima Construction Co., Ltd., and Chinese patent application ZL202021793305.X (hereinafter referred to as Document 2).

[0003] Compared to traditional methods of grouting via manual placement, chutes, or concrete distribution machines, the technologies in References 1 and 2 significantly improve the efficiency of concrete pouring and reduce the generation of waste concrete. However, they generally still have the following problems: 1. Due to the high viscosity and high flow resistance of concrete, it is easy to form local sludge or slight blockage in narrow flow channels or complex structures inside the directional valve, which increases the friction between the valve core and the valve body, hindering the movement of the valve core. Therefore, for existing three-way directional valve grouting devices, a large rotational torque is required to drive the valve core to rotate during directional switching, resulting in high energy consumption; 2. Under this high torque, the valve core and valve body are prone to wear, affecting the service life of the valve. At the same time, sealing failure frequently occurs at the valve core's pivot, leading to concrete leakage.

[0004] In view of this, the present utility model is proposed. Utility Model Content

[0005] This invention proposes a valve and a system comprising the same, with the aim of solving at least one of the above problems.

[0006] To achieve the above technical objectives, the present invention adopts the following technical solution:

[0007] A valve includes a valve housing with a valve cavity formed within it. The valve housing has a first inlet, a second inlet, and a casting port communicating with the valve cavity. A valve core is rotatably disposed within the valve cavity, extending at least partially outside the valve housing and driven by a power mechanism to achieve rotation. One of the first and second inlet is an injection channel, and the other is a branch channel. When the valve core rotates under the drive of the power mechanism, the injection channel can selectively connect to one of the branch channel or the casting port. A rotary sealing assembly is disposed outside the valve cavity at a position where the valve housing and valve core rotate. The rotary sealing assembly includes at least a bearing or bushing arranged around the rotation axis of the valve core, and is capable of preventing fluid leakage from the valve cavity to the outside of the valve housing when the valve core rotates.

[0008] Preferably, the valve core includes a first rotating shaft, a valve core body, and a second rotating shaft arranged sequentially. The valve core is rotatably supported on the valve housing by the first and second rotating shafts. The valve core body is located inside the valve cavity. Rotary sealing assemblies are provided at both the first and second rotating shafts. The valve core body includes an arc-shaped body and sealing portions located on both sides of the arc-shaped body in the direction of extension of the rotation axis of the valve core.

[0009] Compared with the prior art, the present invention has at least the following beneficial effects:

[0010] 1. By using a rotary sealing assembly with bearings or bushings, the bearings or bushings surround and support the valve core, improving the smoothness of the valve core's rotation and greatly reducing the wear of the sealing rings. In addition, the detachable design of the rotary sealing assembly makes maintenance and replacement more convenient and reduces maintenance costs. Furthermore, it uses the first sealing assembly for soft sealing, while relying on the tight fit between the mounting base and the valve core to achieve hard sealing, which can provide good protection for bearings and other components, ensuring the service life of the valve.

[0011] 2. In the valve core body, the concrete seal is confined between the two sealing parts, which can reduce the wear of the valve core body during rotation and reduce the rotational torque required for switching, thereby improving the service life of the valve. Attached Figure Description

[0012] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0013] Figure 1 This is a three-dimensional structural diagram of the valve of this utility model from one perspective.

[0014] Figure 2 This is a three-dimensional structural diagram of the valve of this utility model from another perspective;

[0015] Figure 3 This is a top view of the valve structure of this utility model;

[0016] Figure 4 yes Figure 3 A schematic cross-sectional view of the valve shown in the AA direction;

[0017] Figure 5 yes Figure 4 A magnified view of a portion of region B in the middle;

[0018] Figure 6 This is a three-dimensional structural diagram of the valve core used in this utility model;

[0019] Figure 7 yes Figure 6 The diagram shows the main structural view of the valve core.

[0020] Figure 8 yes Figure 7 A schematic cross-sectional view of the valve core in the CC direction;

[0021] Wherein, 1-first valve housing, 2-second valve housing, 3-rotary sealing assembly, 4-power mechanism, 5-valve core, 6-first sealing assembly,

[0022] 101 - First drainage port, 102 - Second drainage port, 201 - Mounting plate, 202 - Pouring port

[0023] 301-Mounting base, 302-Fastener, 303-Bearing, 304-Sleeve, 305-Cap, 3011-First surface,

[0024] 501-First rotating shaft, 502-Valve core body, 503-Flow channel, 504-Second rotating shaft, 505-Sealing surface.

[0025] 5011 - First shaft section, 5012 - Second shaft section, 5021 - Second surface, 5022 - Sealing part, 5023 - Arc-shaped body. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description of this utility model is provided in conjunction with the embodiments. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.

[0027] like Figures 1 to 8As shown, this utility model provides a valve, which includes a valve shell, a valve cavity formed inside the valve shell, a first inlet 101, a second inlet 102 and a pouring port 202 connected to the valve cavity formed on the valve shell, a valve core 5 rotatably disposed inside the valve cavity, the valve core 5 extending at least partially outside the valve shell and driven by a power mechanism 4 (located outside the valve shell) to achieve the rotation, one of the first inlet 101 and the second inlet 102 is an injection channel port, and the other is a branch channel port (for guiding concrete to the next valve), when the valve core 5 achieves the rotation under the drive of the power mechanism 4, the injection channel port can selectively connect to one of the branch channel port and the pouring port 202, and wherein a rotary sealing assembly 3 is detachably disposed on the valve shell, the rotary sealing assembly 3 includes at least a bearing 303 or bushing (not shown in the figure) disposed around the rotation axis of the valve core 5, and it can prevent fluid from leaking from the valve cavity to the outside of the valve shell when the valve core 5 rotates.

[0028] It should be noted that existing three-way directional valve grouting devices typically only have multiple sealing rings, such as O-rings, at the valve core rotation shaft. This design results in uneven valve core rotation, and the O-rings are prone to wear over long-term use, affecting the overall valve's sealing and service life. This invention utilizes a detachable rotary sealing assembly 3 with bearings or bushings. By using the bearings or bushings to surround and support the valve core 5, it not only improves the smoothness of valve core 5 rotation but also significantly reduces the wear of the sealing rings (a sealing ring may also be used, such as the first sealing assembly 6 described later), extending the valve's service life. Furthermore, the detachable design of the rotary sealing assembly 3 makes maintenance and replacement more convenient, reducing maintenance costs. The bearings 303 or bushings also reduce friction between the valve core 5 and the valve body, further improving the valve's operating efficiency and reliability. It should be noted that the fluid mentioned above is not limited to concrete; it includes solid, liquid, or gaseous media.

[0029] Preferably, the valve housing includes a first valve housing 1 and a second valve housing 2, which are detachably connected to each other. This arrangement facilitates valve production, assembly, and subsequent maintenance. See the example below. Figure 1 and Figure 2 The first drain port 101 and the second drain port 102 are disposed on the first valve body 1. The second valve body 2 includes a mounting plate 201, and the pouring port 202 is disposed on the mounting plate 201. With this arrangement, during the pouring construction, the valve can be directly installed on equipment such as a trolley using the mounting plate 201, and then the concrete pouring construction of the lining can be carried out quickly with the help of the pouring port 202.

[0030] To better achieve the purpose of this utility model, the rotary sealing assembly 3 is at least partially embedded in the valve housing, and its tight fit with the valve core 5 achieves self-sealing, thereby isolating the bearing 303 or bushing from the valve cavity within the valve housing. More specifically, as... Figure 4 and Figure 5 As shown, the rotary seal assembly 3 includes a mounting base 301, a fastener 302, a bearing 303 (which can also be replaced by a bushing or other similar component), and a retaining sleeve 304. The mounting base 301 is detachably mounted on the valve body (e.g., by means of fasteners 302, such as bolts). Figure 5 As shown in the first valve housing 1, the bearing 303 is rotatably limited and mounted outside the valve core 5 via the mounting base 301 and the retaining sleeve 304, isolating it from the valve cavity inside the valve housing. Further, the rotary sealing assembly 3 also includes a first sealing assembly 6. The mounting base 301 is sleeved outside the valve core 5, and the first sealing assembly 6 is disposed between the mounting base 301 and the valve core 5. The bearing 303 is mounted on the side of the first sealing assembly 6 away from the valve cavity, thereby achieving the isolation. Even further, the mounting base 301 extends from outside the valve housing to inside the valve housing, and the portion extending into the valve housing is tightly fitted with the valve core 5. For example, as shown in... Figure 5 As shown, the mounting base 301 has a first surface 3011 on the side facing the valve cavity, and the valve core 5 has a corresponding second surface 5021. The mounting base 301 fits snugly against the second surface 5021 of the valve core 5 through the first surface 3011. This tight fit helps prevent concrete leakage from the valve cavity, thus preventing damage to the first sealing assembly 6 and protecting the bearing 303. It should be noted that this arrangement isolates the valve cavity from the bearing 303 or bushing. This isolation is achieved both through the first sealing assembly 6 and the tight fit. Typically, the first sealing assembly 6 is made of flexible materials such as rubber. Therefore, this solution uses the first sealing assembly 6 for soft sealing while simultaneously achieving a hard seal through the tight fit between the mounting base 301 and the valve core 5. This avoids wear on the first sealing assembly 6, provides good protection for the bearing 303, and ensures the service life of the valve. See also Figure 5 Since the mounting base 301 is detachably mounted on the valve body by fastener 302, the tight fit can be adjusted when the fastener 302 is tightened.

[0031] As a further preferred embodiment, the rotary seal assembly 3 also includes a cover 305 that at least shields the bearing 305 or bushing to prevent it from being exposed to the external environment. This arrangement prevents dust and other environmental contaminants from adversely affecting the bearing.

[0032] In a further preferred embodiment, the valve core 5 includes a first rotating shaft 501, a valve core body 502, and a second rotating shaft 504 arranged sequentially. The valve core 5 is rotatably supported on the valve housing by the first rotating shaft 501 and the second rotating shaft 504. The valve core body 502 is located inside the valve cavity. A rotary sealing assembly 3 is located at both the first rotating shaft 501 and the second rotating shaft 504. Furthermore, both the first rotating shaft 501 and the second rotating shaft 504 include a first shaft segment 5011 and a second shaft segment 5012. Compared to the first shaft segment 5011, the second shaft segment 5012 is located on the side away from the valve core body 502, and the diameter of the second shaft segment 5012 is smaller than that of the first shaft segment 5011. A bearing 305 or a bushing is fitted onto the second shaft segment 5012. With this arrangement, see [reference needed]. Figure 5 The bearing 305 or bushing is limited by the step created by the diameter change on the first shaft 501 and the second shaft 504. More preferably, the first sealing assembly 6 is disposed between the first shaft segment 5011 and the mounting base 301 (see...). Figure 5 Furthermore, the mounting base 301 is tightly fitted onto the outside of the first shaft section 5011 on the side near the valve core body 502.

[0033] To better achieve the purpose of this utility model, the second shaft segment 5012 is also provided with a thread (partially) for installing the retaining sleeve 304 and the cover 305 (see...). Figure 5 Preferably, the portion of the second shaft segment 5012 on which the bearing 303 or bushing is externally mounted is unthreaded.

[0034] To better achieve the purpose of this utility model, the valve core body 502 includes an arc-shaped body 5023 and sealing portions 5022 located on both sides of the arc-shaped body 5023 in the direction extending along the rotation axis of the valve core 5. A flow channel 503 is formed in the arc-shaped body 5023. When the valve core 5 rotates under the drive of the power mechanism 4, the injection port achieves selective conduction through the flow channel 503. With this arrangement, during concrete pouring, the concrete is sealed and confined between the sealing portions 5022 on both sides, which reduces the accumulation of concrete in the narrow flow channels within the valve cavity (e.g., between the arc-shaped body 5023 and the inner wall of the valve cavity) and reduces wear on the valve core body 502 during rotation. Furthermore, since the concrete is sealed and confined between the sealing portions 5022 on both sides, it is equivalent to multiple layers of sealing protection. Initially, when the sealing portion 5022 can seal well, the concrete is blocked by the sealing portion 5022 and cannot reach the position of the rotating sealing assembly 3. Therefore, it can play a good protective role for the bearing 3, etc. Since the contact area with the concrete is limited, for example, initially, there is no concrete on the second side 5021. Therefore, the valve core can be rotated without too much torque, ensuring operation with low energy consumption. This reduces the wear between the valve core and the valve body and extends the service life of the valve.

[0035] Preferably, the sealing part 5022 is provided with multiple annular grooves, and a second sealing component is provided in the annular grooves. The second sealing component can be, for example, an O-ring or an O-ring steel ring, etc. The second surface 5021 is preferably a conical surface.

[0036] In order to better achieve the purpose of this utility model, a sealing surface 505 is also formed on the arc-shaped main body 5023. When the injection channel is connected to the branch channel through the flow channel 503, the sealing surface 505 is just sealed at the pouring port 202, and the sealing surface 505 is basically flush with the plate surface of the mounting plate 201.

[0037] Preferred, see Figure 4 The first rotating shaft 501 on the side where the power mechanism 4 is located extends through the cover 305, while the second rotating shaft 504 on the side away from the power mechanism 4 is covered by the corresponding cover 305.

[0038] It should be understood that all concrete pouring systems that use the valves of this utility model are within the protection scope of this utility model.

[0039] Although the foregoing has shown a technical solution in which the mounting base 301 of the rotary seal assembly 3 is detachably mounted on the valve body by fasteners 302 (see above) Figure 5 However, in some cases, mounting bracket 301 may not be required, for example, Figure 5 The mounting base 301 and fastener 302 shown may simply be part of the first valve housing 1 (which will...) Figure 5 (As shown, the mounting base 301 and fastener 302 are integrated with the first valve housing 1). In this case, the rotary sealing assembly 3 no longer includes the mounting base 301, etc., but only includes the bearing 303 (or bushing), the first sealing assembly 6, the retaining sleeve 304, etc., which can still provide a good sealing effect and improve service life. This solution should also fall within the protection scope of this utility model.

[0040] Furthermore, to facilitate the installation of bearings 303, etc., the mounting base 301 can also be detachably mounted on the valve core 5, for example, mounted on... Figure 5 The bearing 303 and the first sealing assembly 6 shown are only required to be able to rotate and seal with the first valve body 1, provided that the bearing 303 of the rotating sealing assembly 3 and the first sealing assembly 6 can rotate and seal with the first valve body 1. This solution should also fall within the protection scope of this utility model.

[0041] Based on the above analysis, it can be seen that the rotary sealing assembly 3 can be detachably mounted on the valve housing, or it can be detachably mounted on the valve core 5, or it can simply be rotated between the valve housing and the valve core 5 (the "between" here is located outside the valve cavity, and does not include the part of the valve core body 502 inside the valve cavity that cooperates with the valve housing, that is, it belongs to the position outside the valve cavity located at the position where the valve housing and the valve core 5 rotate).

[0042] Finally, it should be noted that in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0043] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to the embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A valve comprising a valve housing, a valve cavity formed therein, a first inlet (101), a second inlet (102), and a casting port (202) communicating with the valve cavity formed on the valve housing, a valve core (5) rotatably disposed within the valve cavity, the valve core (5) extending at least partially outside the valve housing and driven by a power mechanism (4) to achieve said rotation, one of the first inlet (101) and the second inlet (102) being an injection channel and the other being a branch channel, wherein when the valve core (5) achieves said rotation under the drive of the power mechanism (4), the injection channel can selectively connect to one of the branch channel and the casting port (202), characterized in that, A rotary sealing assembly (3) is provided outside the valve cavity at the position where the valve shell and the valve core (5) rotate and engage. The rotary sealing assembly (3) includes at least a bearing (303) or bushing arranged around the rotation axis of the valve core (5). The rotary sealing assembly (3) is able to prevent fluid from leaking from the valve cavity to the outside of the valve shell when the valve core (5) rotates.

2. The valve as described in claim 1, characterized in that, The rotary sealing assembly (3) is at least partially embedded in the valve housing and achieves self-sealing by means of its tight fit with the valve core (5) to isolate the bearing (303) or bushing from the valve cavity in the valve housing.

3. A valve as described in claim 2, characterized in that, The rotary sealing assembly (3) includes a mounting base (301), a fastener (302), a bearing (303), and a retainer (304). The mounting base (301) is detachably mounted on the valve housing or valve core (5) by the fastener (302). The bearing (303) is rotatably limited outside the valve core (5) and isolated from the valve cavity inside the valve housing by the mounting base (301) and the retainer (304).

4. A valve as described in claim 3, characterized in that, The rotary sealing assembly (3) also includes a first sealing assembly (6), with a bearing (303) mounted on the side of the first sealing assembly (6) away from the valve chamber.

5. A valve as described in claim 4, characterized in that, The mounting base (301) is detachably mounted on the valve housing by fasteners (302). The mounting base (301) extends from the outside of the valve housing to the inside of the valve housing, and the part extending into the valve housing is in close contact with the valve core (5).

6. A valve as described in any one of claims 1-5, characterized in that, The valve core (5) includes a first rotating shaft (501), a valve core body (502), and a second rotating shaft (504) arranged in sequence. The valve core (5) is rotatably supported on the valve housing through the first rotating shaft (501) and the second rotating shaft (504). The valve core body (502) is located in the valve cavity. The valve core body (502) includes an arc-shaped body (5023) and sealing portions (5022) located on both sides of the arc-shaped body (5023) in the direction of extension of the rotation axis of the valve core (5).

7. A valve as described in claim 6, characterized in that, Rotary sealing assembly (3) is provided at both the first rotating shaft (501) and the second rotating shaft (504). Both the first rotating shaft (501) and the second rotating shaft (504) include a first shaft segment (5011) and a second shaft segment (5012). Compared with the first shaft segment (5011), the second shaft segment (5012) is located on the side away from the valve core body (502). The diameter of the second shaft segment (5012) is smaller than that of the first shaft segment (5011). The bearing (305) or bushing is fitted on the second shaft segment (5012).

8. A valve as described in claim 6, characterized in that, A flow channel (503) is formed at the arc-shaped main body (5023). When the valve core (5) is driven by the power mechanism (4) to rotate, the injection channel can selectively be guided through the flow channel (503) to one of the branch channel and the pouring port (202).

9. A valve as described in claim 8, characterized in that, A sealing surface (505) is also formed on the arc-shaped main body (5023). When the injection channel is connected to the branch channel through the flow channel (503), the sealing surface (505) is just sealed at the pouring port (202), and the sealing surface (505) is flush with the plate surface of the mounting plate (201).

10. A concrete pouring system, characterized in that, The system includes a valve as described in any one of claims 1-9.

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