Adjusting mechanism of rotary valve element and multi-way valve

Abstract

The utility model discloses an adjusting mechanism of a rotary valve element and a multi-way valve, and relates to the technical field of multi-way valves, the adjusting mechanism of the rotary valve element is used for adjusting the sealing performance between the rotary valve element and a valve body on the multi-way valve and comprises a base and a threaded piece, the base is fixedly arranged on the valve body, the threaded piece is rotatably arranged on the base, and the threaded piece is arranged on the base. The threaded connection end of the threaded piece is in threaded connection with the rotary valve element. The threaded part is rotated, due to the fact that the threaded part is fixed in the axial direction of the rotary valve element, the rotary valve element is forced to axially move towards the end where the threaded part is located, the position, with the large outer diameter, of the rotary valve element is axially moved and adjusted to the abrasion position by means of the axial taper arrangement of the rotary valve element, and therefore the problem of leakage caused by poor sealing performance of the position due to abrasion is solved. And the service life of the rotary valve core is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to the technical field of multi-way valves. Background Art

[0002] A multi-way valve is usually composed of a valve body, a valve core, a valve cover, etc. Its main function is to achieve the distribution and switching of fluids. The valve body, as the supporting structure of the entire valve, is regarded as a stator, which plays a role in fixing and connecting. The valve core can be rotatably set in the valve body and is regarded as a rotor. The position of the fluid channel can be changed by rotation. The valve cover is used to close the valve to prevent liquid leakage. During operation, the multi-way valve receives fluids from different pipelines and controls the flow direction of the fluid by rotating the valve core. When the rotating valve core is in a specific position, the fluid can flow through a specific channel, and when the rotating valve core is rotated to another position, the fluid channel will change, thereby achieving the distribution and switching of the fluid.

[0003] It can be seen that the rotary valve core is one of the key components in the multi-way valve. However, after long-term use and frequent operation, the rotary valve core will cause fluid leakage due to wear. In practice, usually, after the multi-way valve has worked for 2 million times, due to long-term friction and pressure, the sealing surface of the rotary valve core will cause fluid leakage due to wear. When this happens, either the entire multi-way valve is replaced or the multi-way valve is repaired by replacing a new rotary valve core. The former undoubtedly greatly increases the production cost, and the latter mainly increases the cost of using the rotary valve core. In addition, since the multi-way valve requires specific maintenance technology and tools, it generally needs to be returned to the factory for maintenance, which means that the equipment needs to be shut down, resulting in reduced production efficiency and delays in production plans.

[0004] Therefore, how to further improve the service life of the rotary valve core is an important project for enterprises to reduce costs and increase profits. Utility Model Content

[0005] The utility model aims to provide an adjusting mechanism for a rotary valve core and a multi-way valve, wherein the adjusting mechanism is provided to adjust the fluid leakage problem caused by wear of the rotary valve core, thereby extending the service life of the rotary valve core.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A rotary valve core adjustment mechanism, used for adjusting the sealing performance between a rotary valve core and a valve body on a multi-way valve, comprising a base and a threaded member, wherein the base is fixedly arranged on the valve body, the threaded member is rotatably arranged on the base, and the threaded connection end of the threaded member is threadedly connected to the rotary valve core; the rotary threaded member, in view of the fixedness of the threaded member in the axial direction of the rotary valve core, forces the rotary valve core to perform axial displacement toward the end where the threaded member is located, and by means of the axial taper setting of the rotary valve core, the axial displacement of the position where the outer diameter of the rotary valve core is large is adjusted to the wear position, thereby compensating for the leakage problem caused by the poor sealing at this position due to wear, and improving the service life of the rotary valve core;

[0008] Furthermore, a concave structure is provided at one end of the rotary valve core facing the threaded member, and a thread corresponding to the threaded connection end is provided on the inner side wall of the concave structure;

[0009] Furthermore, a threaded sleeve is provided between the threaded member and the rotary valve core, an internal thread threadedly connected to the threaded member is provided on the inner side of the threaded sleeve, and an external thread threadedly connected to the rotary valve core is provided on the outer side of the threaded sleeve; a threaded sleeve is provided between the threaded member and the rotary valve core, and a transition is made through the threaded sleeve, so that the threaded sleeve and the rotary valve core are fully connected, and at the same time, the threaded sleeve and the threaded member are partially connected, which can make up for the problem of poor connection stability between the threaded member and the rotary valve core caused by different materials of the threaded member and the rotary valve core;

[0010] Furthermore, the base is a bearing structure, the outer ring of the bearing structure is fixedly arranged on the valve body, and the inner ring of the bearing structure is synchronously rotatably connected with an end of the threaded member away from the threaded connection end;

[0011] Furthermore, a sink groove for accommodating the base is provided on the valve body, and the sink groove is connected to a cavity on the valve body for accommodating the rotating valve core; in this way, the base is sunken in the sink groove without affecting the flatness of the bottom of the valve body;

[0012] Furthermore, a limiting platform is provided between the sink and the cavity to prevent the base from shifting toward the cavity.

[0013] A multi-way valve comprises a valve body, a rotating valve core and an adjusting mechanism, wherein the rotating valve core is rotatably arranged in the valve body, the outer diameter of the rotating valve core has a taper in its axial direction, at least two first fluid channels are arranged on the valve body, and the rotating valve core is provided with a second fluid channel that is simultaneously connected to at least two of the first fluid channels, and the adjusting mechanism is arranged at one end of the valve body and is threadedly connected to the rotating valve core.

[0014] The beneficial effects of the utility model are:

[0015] By setting up an adjustment mechanism including a base and a threaded part, after the rotary valve core of the multi-way valve is worn, the threaded part is rotated. Since the threaded part is fixed in the axial direction of the rotary valve core, the rotary valve core is forced to be axially displaced toward the end where the threaded part is located. By means of the axial taper setting of the outer diameter of the rotary valve core, the position where the outer diameter of the rotary valve core is larger is axially displaced to the worn position, thereby compensating for the leakage problem caused by wear and increasing the service life of the rotary valve core. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of a circumferential axial cross section of a multi-way valve according to an embodiment of the utility model;

[0017] In the figure:

[0018] 1. valve body; 11. first fluid channel;

[0019] 2. Rotating valve core; 21. Second fluid channel;

[0020] 31. Bearing structure; 32. Threaded part; 33. Threaded sleeve. DETAILED DESCRIPTION

[0021] In the description of the present invention, it should be understood that the terms used to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation.

[0022] The following describes the principle and features of the present invention in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention. It should be noted that the accompanying drawings are all in a very simplified form and are not in precise proportions, and are only used to facilitate and clearly assist in explaining the purpose of the embodiments of the present invention.

[0023] like Figure 1 As shown, in one embodiment of the present utility model, a multi-way valve having an adjusting mechanism provided with a rotating valve core 2, Figure 1 The figure shows a reverse pull multi-way valve as an example, which includes a valve body 1, a rotating valve core 2 and an adjusting mechanism. The valve body 1 is provided with a cavity for accommodating the rotating valve core 2, in which the rotating valve core 2 can be rotatably arranged, and the outer diameter of the rotating valve core 2 has a taper in its axial direction. In short, taking the cylindrical rotating valve core 2 as an example, in the direction shown in the figure, the outer diameter of the rotating valve core 2 shows a gradually decreasing trend from the upper end to the lower end. The valve body 1 is provided with at least two first fluid channels 11, and the rotating valve core 2 is provided with a second fluid channel 21 that is connected to at least the two first fluid channels 11 at the same time. An adjusting mechanism is provided at one end of the valve body 1 and is threadedly connected to the rotating valve core 2;

[0024] The adjustment mechanism includes a base, a threaded member 32 and a threaded sleeve 33:

[0025] A base is fixedly arranged on the valve body 1, and a threaded member 32 is rotatably arranged on the base. In this embodiment, a sink groove for accommodating the base is arranged on the valve body 1, and the sink groove is connected to a cavity on the valve body 1 for accommodating the rotating valve core 2. An annular limit platform for preventing the base from shifting toward the cavity is arranged between the sink groove and the cavity. The base is a bearing structure 31, and the outer ring of the bearing structure 31 is fixedly arranged in the sink groove of the valve body 1. The inner ring of the bearing structure 31 and the lower end of the threaded member 32 are fixedly connected, so that the inner ring and the threaded member 32 can rotate synchronously;

[0026] The threaded connection end of the threaded member 32 is threadedly connected to the rotary valve core 2. In this embodiment, a concave structure is provided at one end of the rotary valve core 2 facing the threaded member 32, a thread corresponding to the threaded connection end is provided on the inner side wall of the concave structure, and a hexagon socket bolt is used as the threaded member 32;

[0027] Furthermore, there may be a situation where the threaded member 32 and the rotary valve core 2 are made of different materials. For example, the threaded member 32 is usually a metal member, while the rotary valve core 2 may be a plastic member. Directly connecting the metal member and the plastic member by threading the parts may easily lead to the problem of poor connection stability. Therefore, in this embodiment, a threaded sleeve 33 is provided between the threaded member 32 and the rotary valve core 2, an internal thread is provided on the inner side of the threaded sleeve 33 to be threadedly connected to the threaded member 32, and an external thread is provided on the outer side of the threaded sleeve 33 to be threadedly connected to the rotary valve core 2. The threaded sleeve 33 is used for transition, and the threaded sleeve 33 and the rotary valve core 2 are fully connected. At the same time, the threaded sleeve 33 and the threaded member 32 are partially connected. This can make up for the problem of poor connection stability between the threaded member 32 and the rotary valve core 2 caused by the different materials of the threaded member 32 and the rotary valve core 2.

[0028] Thus, according to the multi-way valve described in this embodiment, the rotating valve core 2 is worn on the circumferential side due to rotation, resulting in a connection gap between the second fluid channel 21 and the first fluid channel 11, thereby causing a fluid leakage problem. Therefore, the rotating screw member 32 is fixed to the valve body 1 through the base, so that the screw member 32 is fixed in the axial direction of the rotating valve core 2, forcing the rotating valve core 2 to axially shift toward the end where the screw member 32 is located, that is, in Figure 1 The rotary valve core 2 is shifted downward in the middle, and with the help of the axial taper setting of the rotary valve core 2, the position with a larger outer diameter of the rotary valve core 2 is axially shifted and adjusted to the wear position, so as to avoid a gap between the first fluid channel 11 and the second fluid channel 21, thereby compensating for the leakage problem caused by poor sealing at this location due to wear and improving the service life of the rotary valve core 2.

[0029] Through this structure, when the multi-way valve is used 2 million times and wears out, resulting in fluid leakage, the multi-way valve can be adjusted automatically through the adjustment mechanism, which can increase the service life of the multi-way valve by 0.5-1 times. In one test, its service life was increased by 1.5 million times.

[0030] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A rotary valve core adjustment mechanism, used to adjust the sealing between the rotary valve core and the valve body on a multi-way valve, characterized in that: It comprises a base and a threaded component, wherein the base is fixedly arranged on the valve body, the threaded component is rotatably arranged on the base, and the threaded connection end of the threaded component is threadedly connected to the rotating valve core.

2. The adjusting mechanism of the rotary valve core according to claim 1, characterized in that: An inner concave structure is provided at one end of the rotary valve core facing the threaded member, and a thread corresponding to the threaded connection end is provided on the inner side wall of the inner concave structure.

3. The adjusting mechanism of the rotary valve core according to claim 1, characterized in that: A threaded sleeve is arranged between the threaded member and the rotary valve core, an internal thread threadedly connected to the threaded member is arranged on the inner side of the threaded sleeve, and an external thread threadedly connected to the rotary valve core is arranged on the outer side of the threaded sleeve.

4. The adjusting mechanism of the rotary valve core according to claim 1, characterized in that: The base is a bearing structure, the outer ring of the bearing structure is fixedly arranged on the valve body, and the inner ring of the bearing structure is synchronously rotatably connected with an end of the threaded member away from the threaded connection end.

5. The adjusting mechanism of the rotary valve core according to claim 1, characterized in that: A sink groove for accommodating the base is arranged on the valve body, and the sink groove is connected to a cavity on the valve body for accommodating the rotating valve core.

6. The adjusting mechanism of the rotary valve core according to claim 5, characterized in that: A limiting platform is arranged between the sink and the cavity to prevent the base from shifting toward the cavity.

7. A multi-way valve, characterized in that: It includes a valve body, a rotating valve core and an adjusting mechanism as described in any one of claims 1 to 6, wherein the rotating valve core is rotatably arranged in the valve body, the outer diameter of the rotating valve core has a taper in its axial direction, at least two first fluid channels are arranged on the valve body, and the rotating valve core is provided with a second fluid channel that is simultaneously connected to at least two of the first fluid channels, and the adjusting mechanism is arranged at one end of the valve body and is threadedly connected to the rotating valve core.

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