High-sealing-performance proportional valve

Abstract

The utility model discloses a proportional valve with high sealing performance, which comprises a valve body and a valve core rotationally arranged in the valve body, the valve core is formed by sequentially overlapping an upper valve plate, a middle valve plate group and a lower valve plate from top to bottom, the upper valve plate, the middle valve plate group and the lower valve plate are formed by symmetrical valve clacks, and circular fixing parts are arranged at the centers of the upper valve plate, the middle valve plate group and the lower valve plate. Each group of fixing parts are connected in series through a petal-type driven gear shaft; a containing cavity is formed in the side, facing the upper valve plate, of a valve clack of the lower valve plate. Sealing rubber strips are arranged on the sides, facing the lower valve plate, of the valve clacks of the upper valve plate and the middle valve plate group; after the upper valve plate, the middle valve plate group and the lower valve plate are overlapped in sequence, the sealing rubber strip is propped against the bottom of the accommodating cavity; the sealing rubber strip is clamped and fixed through the clamping plate. The proportional control valve is novel in structure, the valve plates are subjected to structural optimization, the containing cavities are designed and abut against the sealing rubber strips, the sealing performance between the valve plates is greatly improved, and proportional control accuracy is improved.

Description

Technical Field

[0001] The utility model relates to the field of fluid cutoff, in particular to a high-sealing proportional valve. Background Art

[0002] A proportional valve is a hydraulic valve that converts an input electrical signal into proportional force or displacement, thereby continuously controlling parameters such as pressure and flow. The valve core is a key component of the proportional valve. Located within the valve body, it adjusts the degree of fluid passageway opening based on changes in the control signal. The valve core is typically made of metal or non-metallic materials and exhibits certain sealing and wear resistance properties.

[0003] The valve discs in traditional proportional valves are in hard contact with each other, and the sealing between them has very high requirements on the flatness of the valve disc surface. If the flatness is not high, fluid loss is likely to occur, resulting in inaccurate flow rate proportional control. Utility Model Content

[0004] The utility model aims to provide a high-sealing proportional valve which is not easy to leak.

[0005] The purpose of the utility model is achieved as follows: a high-sealing proportional valve, comprising a valve body, and also comprising a valve core rotatably arranged in the valve body, the valve core being composed of an upper valve plate, an intermediate valve plate group, and a lower valve plate stacked in sequence, the upper valve plate, the intermediate valve plate group, and the lower valve plate being composed of symmetrical valve flaps, a circular fixing part being provided in the center of the upper valve plate, the fixing part of each group being connected in series through a flap-type driven gear shaft; an accommodating cavity being provided on the side of the valve flap of the intermediate valve plate group and the lower valve plate facing the upper valve plate; a sealing strip being provided on the side of the valve flap of the upper valve plate and the intermediate valve plate group facing the lower valve plate; after the upper valve plate, the intermediate valve plate group, and the lower valve plate are stacked in sequence, the sealing strip is in conflict with the bottom of the accommodating cavity; the sealing strip is clamped and fixed by a plywood.

[0006] Preferably, the splint consists of a left splint and a right splint, the left splint is welded and fixed to the valve disc, the right splint is fixedly connected to the left splint by bolts, and the sealing strip is placed between the left splint and the right splint.

[0007] Preferably, after the upper valve plate, the middle valve plate group, and the lower valve plate are stacked in sequence, the bottom of the clamping plate does not conflict with the bottom of the accommodating cavity and a gap is left.

[0008] Preferably, the accommodating cavity is provided with an opening on a side close to the inner wall of the valve body without a baffle.

[0009] Preferably, one side of the two end portions of the sealing strip contacts the side of the circular fixing portion, and the other side contacts the inner wall of the valve body.

[0010] Compared with the existing technology, the benefit of the present invention is that by arranging multiple groups of sealing strips between the valve plates, the hard contact between the valve plates can be converted into soft contact. The sealing strips greatly improve the sealing between the valve plates, avoiding the poor sealing between the traditional valve plates. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural diagram of the present utility model.

[0012] Figure 2 This is a front structural diagram of the upper valve plate, the middle valve plate group, and the lower valve plate of the utility model.

[0013] Figure 3 This is a schematic diagram of the back structure of the upper valve plate and the middle valve plate group of the utility model.

[0014] Figure 4 for Figure 3 A magnified view of the structure at center A.

[0015] 1 valve body, 2 valve core, 201 upper valve plate, 202 middle valve plate group, 203 lower valve plate, 3 valve disc, 4 fixing part, 5 disc type driven gear shaft, 6 accommodating chamber, 7 sealing strip, 8 plywood, 801 left plywood, 802 right plywood. DETAILED DESCRIPTION

[0016] The following describes the implementation of the present invention through specific embodiments. People familiar with this technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0017] It should be noted that in the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the utility model product is usually placed when in use. These are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third" and the like are only used to distinguish descriptions, and cannot be understood as indicating or implying relative importance. Terms such as "horizontal", "vertical", and "overhanging" do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0018] It should also be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections, direct connections, indirect connections via an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0019] like Figure 1-4 As shown, a high-sealing proportional valve includes a valve body 1 and a valve core 2 rotatably arranged in the valve body 1. The valve core 2 is composed of an upper valve disc 201, an intermediate valve disc group 202, and a lower valve disc 203 stacked in sequence. The upper valve disc 201, the intermediate valve disc group 202, and the lower valve disc 203 are composed of a symmetrical valve disc 3. A circular fixing part 4 is provided in the center of the upper valve disc 201, the intermediate valve disc group 202, and the lower valve disc 203. Each group of fixing parts 4 is connected in series through a disc-type driven gear shaft 5; the valve disc 3 of the intermediate valve disc group 202 and the lower valve disc 203 is provided with an accommodating cavity 6 on the side facing the upper valve disc 201; the valve disc of the upper valve disc 201 and the intermediate valve disc group 202 is provided with a sealing strip 7 on the side facing the lower valve disc 203; after the upper valve disc 201, the intermediate valve disc group 202, and the lower valve disc 203 are stacked in sequence, the sealing strip 7 is in conflict with the bottom of the accommodating cavity 6; the sealing strip 7 is clamped and fixed by a clamping plate 8.

[0020] like Figure 3-4 As shown, the splint 8 consists of a left splint 801 and a right splint 802. The left splint 801 is welded and fixed to the valve disc, and the right splint 802 is fixedly connected to the left splint 801 by bolts. The sealing strip 7 is placed between the left splint and the right splint. On one group of valve discs, the sealing strip is arranged at one side edge of one group of valve discs, and the sealing strip on the other group of valve discs is arranged in a mirror symmetrical manner with it. In this way, after the valve discs are stacked in sequence, the valve discs can be rotated and unfolded in sequence.

[0021] like Figure 1-3 As shown, after the upper valve plate 201, the middle valve plate group 202, and the lower valve plate 203 are stacked in sequence, the bottom of the splint 8 does not conflict with the bottom of the accommodating cavity 6 and a gap is left. The splint body can be completely embedded in the accommodating cavity to ensure that the splint will not scrape against the bottom of the accommodating cavity during operation.

[0022] like Figure 2 As shown, the accommodating cavity 6 has an opening without a baffle on one side close to the inner wall of the valve body 1. The opening is used to extend the outer edge of the sealing strip to the inner wall of the valve body to further reduce the gap between the valve plate and the valve body.

[0023] like Figure 1-3As shown, one end of the sealing strip 7 contacts the side of the circular fixing part 4, and the other side contacts the inner wall of the valve body 1. The three sides of the sealing strip, namely the bottom, contact the bottom of the accommodating cavity, the inner end contacts the fixing part, and the outer end contacts the inner cavity of the valve body, thereby improving the sealing between the valve plates.

[0024] The working principle of the present invention is explained as follows: during assembly, multiple groups of valve discs are stacked in sequence and connected through a petal-type driven gear shaft. When opening and closing according to the proportion, different valve discs can be driven to rotate, and the size of the opening can be controlled to achieve proportional adjustment; the sealing strip located inside the valve disc will form a conflict with the adjacent valve disc to form a seal, thereby improving the sealing between the valve discs.

[0025] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the concept and scope of the present invention. Any modifications and improvements to the technical solution of the present invention made by a person of ordinary skill in the art without departing from the design concept of the present invention shall fall within the scope of protection of the present invention. The technical content sought to be protected by the present invention is fully set forth in the claims.

Claims

1. A high sealing proportional valve, characterized in that: It includes a valve body and a valve core rotatably arranged in the valve body, the valve core is composed of an upper valve plate, an intermediate valve plate group, and a lower valve plate stacked in sequence, the upper valve plate, the intermediate valve plate group, and the lower valve plate are composed of symmetrical valve flaps, and a circular fixing part is provided in the center of the upper valve plate, the intermediate valve plate group, and the lower valve plate, and each group of the fixing parts is connected in series through a flap-type driven gear shaft; the valve flaps of the intermediate valve plate group and the lower valve plate are provided with an accommodating cavity on the side facing the upper valve plate; the valve flaps of the upper valve plate and the intermediate valve plate group are provided with a sealing strip on the side facing the lower valve plate; after the upper valve plate, the intermediate valve plate group, and the lower valve plate are stacked in sequence, the sealing strip is in conflict with the bottom of the accommodating cavity; the sealing strip is clamped and fixed by a plywood.

2. A high sealing proportional valve according to claim 1, characterized in that: The splint is composed of a left splint and a right splint, the left splint is welded and fixed on the valve disc, the right splint is fixedly connected to the left splint by bolts, and the sealing strip is placed between the left splint and the right splint.

3. A high sealing proportional valve according to claim 2, characterized in that: After the upper valve plate, the middle valve plate group and the lower valve plate are stacked in sequence, the bottom of the clamping plate does not conflict with the bottom of the accommodating cavity and a gap is left.

4. A high sealing proportional valve according to claim 1, characterized in that: The accommodating cavity is provided with an opening on a side close to the inner wall of the valve body without a baffle.

5. A high sealing proportional valve according to claim 1, characterized in that: One side of the end portions of the two ends of the sealing strip contacts the side portion of the circular fixing portion, and the other side contacts the inner wall of the valve body.

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