Valve element

Abstract

The utility model provides a valve element, and belongs to the technical field of valves. The problem that when an existing valve element shell is made of plastic materials, the connection stability of the valve element shell and a pressing cap is poor is solved. The valve element comprises a valve element shell made of plastic materials, a main body and an annular pressing cap made of metal materials, one end of the valve element shell is an installation end, the installation end is provided with an opening allowing the main body to be installed in the valve element shell, and the pressing cap is arranged in the opening. The installation end of the valve element shell is cylindrical, a plurality of clamping openings are formed in the side portion, located at an opening, of the valve element shell in a penetrating mode, the clamping openings are distributed around the axis of the installation end, the outer side of the pressing cap is provided with a protruding ring-shaped protruding ring, the protruding ring and the clamping openings are opposite in position, and the protruding ring can be partially clamped into the clamping openings. The valve element has the advantage of being good in connection stability.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves and relates to a valve core. Background Art

[0002] The valve core is usually set in the valve body to control or switch the water path. Taking the three-way valve as an example, the valve body has three ports, one inlet and two outlets or two inlets and one outlet. For one inlet and two outlets, the inlet is fixed, and the switching of different outlets is achieved by rotating the valve core. Similarly, for two inlets and one outlet, the outlet is fixed, and different inlets are achieved by rotating the valve core. When one inlet is connected to one outlet, the other outlet or inlet needs to be blocked by the valve core.

[0003] The existing valve core generally includes a valve core shell with a water inlet and a water outlet. The top of the valve core shell is open for the valve core body to be installed. After the valve core body is installed, the top of the valve core shell is sealed by a pressure cap to prevent the valve core body from moving. Here, the connection between the pressure cap and the valve core shell is mostly threaded, which has good connection stability and can be applied to various strength places. In this type of threaded sealing valve core, the valve core shell is generally made of metal material, which is convenient for processing the internal thread.

[0004] However, a valve core shell made of metal material means high cost and heavy weight and other problems. If the valve core shell is made of plastic material, since plastic is generally formed in one piece by injection molding, the valve core shell is easily cracked during secondary processing of the internal thread after the molding, thereby affecting the connection stability of the valve core shell and the pressure cap. Utility Model Content

[0005] The utility model aims to solve the above problems in the prior art and proposes a valve core, which solves the problem of poor connection stability between the existing valve core shell and the pressure cap when the valve core shell is made of plastic material.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] A valve core comprises a valve core shell made of plastic material, a main body and a ring-shaped pressure cap made of metal material, one end of the valve core shell is a mounting end, the mounting end has an opening for the main body to be installed in the valve core shell, the pressure cap is arranged in the opening, and is characterized in that the mounting end of the valve core shell is cylindrical and a plurality of bayonet holes are penetrated through the side of the valve core shell at the opening, the plurality of bayonet holes are distributed around the axis of the mounting end, the outer side of the pressure cap has a protruding convex ring in a ring shape, the convex ring is opposite to the bayonet hole and the convex ring can be partially inserted into the bayonet hole.

[0008] In this valve core, the valve core shell is made of plastic material, and the pressure cap is made of metal material, so that the hardness of the pressure cap is greater than the hardness of the valve core shell. During production, the outer diameter of the convex ring on the pressure cap is slightly larger than the inner diameter of the installation end. When assembling, the pressure cap is pressed into the valve core shell, and the part of the convex ring that is opposite to the bayonet position is clamped into the bayonet by relying on the slight deformation of the installation end of the valve core shell, so as to achieve the fixation of the pressure cap and the valve core shell. In this connection structure, the convex ring on the outside of the pressure cap is annular, that is, the entire convex ring is a whole. Compared with the block structure that is divided into several and one-to-one corresponding clamps that are clamped into each bayonet, the convex ring has better strength and is not easy to deform or break, thereby ensuring the strength and stability of the connection. The opening precision requirements of the through bayonet are low, and it is easier to open and is not easy to cause damage to the valve core shell, further ensuring the stability of the connection.

[0009] In the above-mentioned valve core, the end surface of the convex ring facing the installation end port is a plane and the plane is arranged perpendicular to the axis of the installation end, and the other end of the convex ring is a conical surface, and the diameter of the conical surface gradually increases from the inside of the installation end to the installation end port. The setting of the conical surface facilitates the pressing cap to be pressed into the valve core housing, and the setting of the plane can abut against the top wall of the bayonet to prevent the pressing cap from falling out and ensure the stability of the connection.

[0010] In the above valve core, the number of the bayonet holes is at least three. Multiple bayonet holes realize multi-point positioning and improve connection stability.

[0011] In the valve core, there are four bayonet holes, which are opposite to each other in pairs, and the opening directions of each pair of bayonet holes are the same. The bayonet holes are opposite to each other in pairs and have the same opening directions, which facilitates the processing of the bayonet holes.

[0012] In the valve core, the inner wall of the pressure cap has a protruding annular convex edge, and the convex edge and the convex ring are respectively located on the inner and outer sides of the pressure cap and are opposite to each other. The setting of the convex edge is conducive to pressing the main body and enhancing the strength of the convex ring, further ensuring the stability of the connection.

[0013] Compared with the prior art, in the connection structure of the valve core, the convex ring on the outside of the pressure cap is annular, that is, the entire convex ring is a whole. Compared with the block structure divided into several and one-to-one corresponding clamps inserted into each bayonet, the convex ring has better strength and is not easy to deform or break, thus ensuring the strength and stability of the connection. The opening precision requirement of the through bayonet is low, which makes it easier to open and not easy to cause damage to the valve core shell, further ensuring the stability of the connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the cross-sectional structure of the valve core.

[0015] Figure 2 It is a schematic diagram of the cross-sectional structure of the valve core from another perspective.

[0016] In the figure, 1, valve core housing; 2, main body; 3, pressure cap; 4, installation end; 5, bayonet; 6, convex ring; 7, convex edge. DETAILED DESCRIPTION

[0017] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0018] like Figure 1 As shown, the valve core includes a valve core shell 1 having a water inlet and a water outlet and made of plastic material, a main body 2 capable of controlling the on and off of the water inlet and the water outlet, and a ring-shaped pressure cap 3 made of metal material. One end of the valve core shell 1 is a cylindrical mounting end 4, which has an opening for the main body 2 to be installed in the valve core shell 1, and the pressure cap 3 is arranged in the opening and close to the port of the mounting end 4. Here, the valve core shell 1 can be made of PPSU material, and the specific structure of the main body 2 can be the same as the main body structure in the invention patent application with application number 201810892344.6 applied by the applicant, and no further description is given.

[0019] The side of the valve core housing 1 at the opening is provided with a plurality of bayonet holes 5, which are distributed around the axis of the mounting end 4. The outer side of the pressure cap 3 is provided with a protruding annular convex ring 6, which is opposite to the bayonet hole 5 and can be partially inserted into the bayonet hole 5. In this embodiment, the end surface of the convex ring 6 facing the port of the mounting end 4 is a plane, and the plane is perpendicular to the axis of the mounting end 4. The other end of the convex ring 6 is a conical surface, and the diameter of the conical surface gradually increases from the inside of the mounting end 4 to the direction of the port of the mounting end 4, and a sharp angle is formed at the intersection of the plane and the conical surface; the inner wall of the pressure cap 3 is provided with a protruding annular convex edge 7, and the convex edge 7 and the convex ring 6 are respectively located on the inner and outer sides of the pressure cap 3 and the positions of the two in the axial direction of the pressure cap 3 are substantially the same.

[0020] like Figure 2 As shown, the number of the bayonet holes 5 is at least three, preferably four, and they are opposite to each other in pairs, and the opening directions of every two opposite bayonet holes 5 are the same.

[0021] The outer diameter of the convex ring 6 on the pressure cap 3 in the present valve core is slightly larger than the inner diameter of the mounting end 4. During assembly, the pressure cap 3 is pressed into the valve core housing 1 by relying on the conical surface, and the portion of the convex ring 6 that is opposite to the bayonet 5 is clamped into the bayonet 5 by relying on a small deformation of the mounting end 4 of the valve core housing 1, thereby achieving the fixation of the pressure cap 3 and the valve core housing 1.

[0022] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A valve core, comprising a valve core housing (1) made of plastic material, a main body (2) and a ring-shaped pressing cap (3) made of metal material, wherein one end of the valve core housing (1) is a mounting end (4), the mounting end (4) has an opening for the main body (2) to be installed in the valve core housing (1), and the pressing cap (3) is arranged in the opening, characterized in that: The mounting end (4) of the valve core housing (1) is cylindrical and a plurality of bayonet holes (5) are provided through the side of the valve core housing (1) at the opening. The bayonet holes (5) are distributed around the axis of the mounting end (4). The outer side of the pressure cap (3) has a protruding convex ring (6) in the shape of a circular ring. The convex ring (6) is opposite to the bayonet hole (5) and the convex ring (6) can be partially inserted into the bayonet hole (5).

2. The valve core according to claim 1, characterized in that: One end surface of the convex ring (6) facing the port of the mounting end (4) is a plane and the plane is arranged perpendicular to the axis of the mounting end (4); the other end of the convex ring (6) is a conical surface and the diameter of the conical surface gradually increases from the inside of the mounting end (4) toward the port of the mounting end (4).

3. The valve core according to claim 1 or 2, characterized in that: The number of the bayonet holes (5) is at least three.

4. The valve core according to claim 3, characterized in that: The number of the bayonet openings (5) is four, and they are opposite to each other in pairs, and the opening directions of every two opposite bayonet openings (5) are the same.

5. The valve core according to claim 1 or 2, characterized in that: The inner wall of the pressing cap (3) has a protruding convex edge (7) in the shape of a circular ring. The convex edge (7) and the convex ring (6) are respectively located on the inner and outer sides of the pressing cap (3) and are located opposite to each other.

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