An improved automatic valve core structure for a water separator or a heating valve

Abstract

The present invention relates to the field of valves, and particularly to an improved structure of an automatic valve core for a water distributor or a heating valve. It includes a valve core body with an actuator connection thread and a valve body fixing thread, and a valve rod is provided on the central axis of the valve core body; the valve rod is successively provided with a sealing ring, a circlip, a spring in the valve core body from top to bottom, and a sealing valve flap outside the valve core body; the upper part of the inner cavity of the valve core body has no connection port, and a top block is provided at the lower end of the valve core body, and the upper end surface of the top block is subjected to the thrust of the spring. This application breaks the routine, eliminates the only upper sealing connection structure on the standard valve core structure, changes the material at the same time, further adjusts the structure due to the change of the material, changes the previous assembly and fixed connection methods, and meets the requirements of various existing standard parts. At the same time, the product has better sealing performance, strong market competitiveness, novel product structure, practical design, and has market promotion value.

Description

Technical Field

[0001] The utility model relates to the field of valves. Background Art

[0002] In the field of valves, especially in the field of intelligent temperature control valves, automatic valve cores are widely used. For example, in the "Improved Structure of an Intelligent Valve Core for a Water Divider" with the publication number CN210484784 U, a valve stem and a spring for resetting the valve stem upward are provided inside the valve core, so that when an electric actuator or a temperature bulb is installed on the upper part, it can be closed downward for sealing and returned to the open position. The valve core structure of the "Connection Structure for a Temperature Control Valve" with the publication number CN212690975 U is used for a heating valve, and the valve core structure is similar. Generally, the valve is opened and closed by the action of a temperature bulb on the valve core; the "Scale Prevention Valve Core" with the publication number CN204922216U also has a similar structure, and the upper bottom of the valve stem is wrapped with a rubber sleeve, which has the function of scale prevention.

[0003] The automatic valve core is a standard part of a relatively common intelligent temperature control valve. As shown in the attached Figure 1 figure, it includes an actuator connection thread 10' and a valve body fixing thread 11' with an M30x1.5 standard interface on the valve core body 1'; a valve stem 2' is provided on the central axis of the valve core body 1'; from top to bottom, a sealing ring 3', a circlip 4', a spring 5' are sequentially arranged inside the valve core body 1' for the valve stem 2', and a sealing valve flap 6' outside the valve core body 1'; the fittings inside the valve core body 1' are fixed by threaded connection with the upper valve core cover 7' to form a connection port 12', and are sealed with an O-ring 13'; a positioning hexagonal structure 70' with a 19-mm across flats is also provided on the valve core cover 7' for positioning some standard fixing interfaces of the actuator. Its structure and fittings combination have been basically finalized in recent years, with few improvements. This valve core standard part is like the ceramic valve core of a bathroom angle valve, and there are many professional manufacturers of standard valve core parts, forming a product standard in the industry.

[0004] Generally, one automatic valve core is equipped on a heating valve, but on a water divider, four, five or more are usually installed, and even more than a dozen in some cases, to meet the control of multiple pipelines. For the valve cores assembled in batches, the requirement for sealing is relatively high. Therefore, the sealing structure of the automatic valve core has always been an important topic discussed and studied in the industry, although its structure has been basically finalized and is relatively mature. Summary of the Invention

[0005] Based on the applicant's years of production, application and problem feedback of automatic valve cores, the present invention provides an improved automatic valve core structure. On the basis of maintaining the standard structure of the valve core, this structure reduces an upper sealing connection structure, can meet the requirements of execution force, and improves the safety of the sealing parts.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] An improved structure of an automatic valve core for a water separator or a heating valve, including a valve core body with an actuator connection thread and a valve body fixing thread, and a valve rod is arranged on the central axis of the valve core body; a sealing ring, a snap ring, a spring are sequentially arranged on the valve rod from top to bottom in the valve core body, and a sealing valve flap outside the valve core body; the upper part of the inner cavity of the valve core body has no connection port, and a top block is arranged at the lower end of the valve core body, and the upper end surface of the top block is pushed by the spring.

[0008] The solution of the present invention may also be:

[0009] A pin positioning hole is arranged at the lower end of the valve core body, an annular pin slot is arranged on the top block, and the pin fixes the top block on the valve core body through the pin positioning hole and the annular pin slot.

[0010] There are two side-by-side pin positioning holes, and the pin is a U-shaped pin.

[0011] The top block is fixed at the bottom of the valve core body through a threaded structure.

[0012] The valve core body is made of high-temperature resistant plastic, and a disassembly and assembly groove is arranged on the upper part of the outer side of the valve core body.

[0013] There are more than two disassembly and assembly grooves, which are annularly and evenly distributed on the upper part of the outer side of the valve core body.

[0014] A positioning cover is arranged on the upper part of the valve core body, and the positioning cover has a hexagonal structure.

[0015] A convex block is arranged at the lower part of the positioning cover, and the convex block cooperates with the disassembly and assembly groove to achieve limit; the main body of the positioning cover covers the disassembly and assembly groove.

[0016] The sealing ring adopts a double O-ring structure.

[0017] An anti-scaling rubber sleeve is arranged between the top block and the valve rod.

[0018] An improved structure of an automatic valve core for a water separator or a heating valve of the present invention breaks the convention, reduces an upper sealing connection structure on the standard valve core structure, changes the material at the same time, further adjusts the structure due to the change of the material, changes the previous assembly and fixed connection methods, while meeting the requirements of existing standard parts, the product has better sealing performance, stronger market competitiveness, novel structure, practical design, and has market promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic cross-sectional structure diagram of the automatic valve core of the prior art;

[0020] Figure 2 Schematic three-dimensional structure diagram of the automatic valve core of the first embodiment;

[0021] Figure 3, Schematic three-dimensional structure diagram of the valve core body in the first embodiment;

[0022] Figure 4 , Schematic exploded three-dimensional structure diagram of the automatic valve core in the first embodiment;

[0023] Figure 5 , Schematic sectional three-dimensional structure diagram of the automatic valve core in the first embodiment;

[0024] Figure 6 , Schematic sectional structure diagram of the automatic valve core in the second embodiment;

[0025] Figure 7 , Schematic partially sectional structure diagram of the automatic valve core in the third embodiment;

[0026] Figure 8 , Schematic three-dimensional structure diagram of the valve core body in the fourth embodiment.

[0027] In the figure: valve core body 1, actuator connection thread 10, valve body fixing thread 11, pin positioning hole 12, disassembly and assembly groove 13, valve stem hole 14, anti-scaling rubber sleeve 18, clearance space 19, valve stem 2, sealing ring 3, snap ring 4, spring 5, sealing valve flap 6, plastic valve seat 60, fixed part 61, gap 62, top block 7, pin 8, upper end face 70, annular pin groove 71, sealing block 72, positioning cover 9, hexagonal structure 90, convex block 91, main body 92, fixed limit rib structure 93, disassembly port 94. Detailed implementation manners

[0028] The following further describes the preferred embodiments of the present invention with reference to the accompanying drawings.

[0029] As shown in the preferred embodiment from Figure 2 to Figure 5 , an improved structure of an automatic valve core for a water distributor or a heating valve includes a valve core body 1 with an actuator connection thread 10 and a valve body fixing thread 11. A valve stem 2 is provided on the central axis of the valve core body 1. The valve stem 2 is sequentially provided with a sealing ring 3, a snap ring 4, a spring 5 inside the valve core body 1 from top to bottom, and a sealing valve flap 6 outside the valve core body 1. The upper part of the inner cavity of the valve core body 1 has no connection port, and a top block 7 is provided at the lower end of the valve core body 1. The upper end face 70 of the top block 7 is subjected to the thrust of the spring 5.

[0030] This automatic valve core is used for a water distributor or a heating valve. It can intelligently control the opening and closing of the valve through an electric actuator or a temperature bulb. The electric actuator or the temperature bulb acts on the valve stem 2 of the automatic valve core, exerting forces up and down to achieve the opening and closing of the fluid medium of the valve, and the spring 5 realizes the reset. The actuator connection thread 10 of the valve core body 1 is a standard connection structure in the industry, and the valve body fixing thread 11 realizes the connection with the valve. The valve stem 2 is generally made of a stainless steel rod, which has high strength and is convenient for finish machining. The snap ring 4 on the valve stem 2 can be made into an integral structure with the valve stem 2. In the prior art, a valve core cover is equipped on the upper part of the valve core body 1. The valve core cover uses a thread plus a sealing ring, which results in a connection port existing on the upper part of the valve body. Due to problems such as non-concentric thread machining or the quality, size, and fit of the sealing ring, there is a safety hazard at the connection port. Reducing the only connection port in the inner cavity of the valve core body 1 will greatly improve the safety of the automatic valve core.

[0031] Although a valve stem hole 14 is provided between the valve stem 2 and the valve core body 1, the concentricity of the machining of the valve stem hole 14 is good, the process fit is simple, the fit with the sealing ring 3 is good, and the reliability of the seal is extremely high. There is basically no leakage statically. The sealing ring 3 adopts a double O-ring structure, with good material compatibility, convenient for lengthening the structure, which can greatly improve the safety and reliability. At the same time, the valve stem 3 has the characteristic of moving up and down, which can improve the dynamic sealing performance of the automatic valve core. The dynamic sealing performance is also a headache problem in the industry. In the case of high-pressure and high-temperature media, the valve stem moves up and down for a long time, resulting in dynamic leakage. Although the leakage amount is very small and has little impact on the use; while the double O-ring structure, the rear sealing ring can effectively reduce the medium pressure on the sealing ring 3, thereby effectively solving the dynamic leakage.

[0032] The setting of the top block 7 is different from that of the valve core cover. When water enters due to dynamic movement at the sealing section at the bottom of the automatic valve core, the sealing safety of the upper part without a connection port can also be guaranteed. While setting a valve core cover on the upper part of the valve core body, it is necessary to test the sealing safety of the valve core cover and its sealing ring. It is also feasible not to set a sealing ring on the top block 7 at the lower part of the valve core body 1. The sealing reliability at the sealing ring 3 is high, there is a certain air pressure block, and it is difficult for the valve liquid medium to enter. In the embodiment, the top block 7 is provided with a sealing section.

[0033] The lower end of the valve core body 1 is provided with a pin positioning hole 12, and the top block 7 is provided with an annular pin slot 71. The pin 8 fixes the top block 7 on the valve core body 1 through the pin positioning hole 12 and the annular pin slot 71. Compared with threaded connection, the pin has a degree of looseness and has the characteristic of automatically adjusting the size. The valve stem 2 can be automatically adjusted to the axis of the valve core without being affected by the non-concentric machining of the valve stem hole and the thread. The valve stem 2 runs vertically and smoothly, and the sealing valve flap 6 will not cause the sealing surface to tilt due to the inclination of the valve stem, improving the safety of actual application.

[0034] Two pin positioning holes 12 are arranged side by side, and the pin 8 is a U-shaped pin. The U-shaped pin is convenient for installation and disassembly and has good consistency.

[0035] The top block 7 is under the pressure of the spring 5 and is repeatedly compressed hundreds of thousands of times within the service life, so there are relatively high requirements for the connection reliability between the top block 7 and the valve core body 1. The top block 7 can also be fixed to the bottom of the valve core body 1 through a threaded structure; however, the connection between the pin 8 and the annular pin slot 71 has higher fastening and reliability, and better structural compactness.

[0036] The valve core body 1 is made of high-temperature resistant plastic, and a disassembly and assembly groove 13 is provided on the upper part of the outer side of the valve core body 1. The applicant has used high-strength plastic to make the valve core body and set a standard positioning hexagonal structure integrated with the valve core body. During the installation process, there is a common situation that the positioning hexagonal structure is deformed by a wrench or a socket, resulting in the failure of the positioning hexagonal structure. After repeated design and testing by the applicant, by using the disassembly and assembly groove 13 and a special tool, a large tightening force can be provided while minimizing deformation damage. Two or more disassembly and assembly grooves 13 are provided and are evenly distributed in a ring on the upper part of the outer side of the valve core body 1.

[0037] The high-temperature resistant plastic is plastic materials such as PPSU, reinforced nylon, or POM.

[0038] In order to make up for the existence of the standard positioning hexagonal structure, a positioning cover 9 is provided on the upper part of the valve core body 1 in this embodiment, and the positioning cover 9 is provided with a hexagonal structure 90. A convex block 91 is provided on the lower part of the positioning cover 9, and the convex block 91 cooperates with the disassembly and assembly groove 13 to achieve limit; the main body 92 of the positioning cover 9 covers the disassembly and assembly groove 13. Even if the disassembly and assembly groove 13 is deformed, the positioning cover 9 can play a good covering role. The positioning cover 9 is installed into the valve core body 1, and the main body 92 is not higher than the upper plane of the actuator connection thread 10.

[0039] A fixed limit rib structure 93 and a disassembly port 94 are also provided on the positioning cover 9.

[0040] As shown in the preferred Embodiment 2 attached Figure 6 In the improved structure of the automatic valve core for a water separator or a heating valve shown, it includes a valve core body 1 with an actuator connection thread 10 and a valve body fixing thread 11. A valve rod 2 is provided on the central axis of the valve core body 1; a sealing ring 3, a snap ring 4, a spring 5 are sequentially arranged in the valve core body 1 from top to bottom along the valve rod 2, and a sealing valve flap 6 outside the valve core body 1; there is no connection port in the upper part of the inner cavity of the valve core body 1, and a top block 7 is provided at the lower end of the valve core body 1. The upper end surface 70 of the top block 7 is subjected to the thrust of the spring 5.

[0041] A pin positioning hole is provided at the lower end of the valve core body 1, an annular pin slot 71 is provided on the top block 7, and the pin 8 fixes the top block 7 on the valve core body 1 through the pin positioning hole and the annular pin slot 71. In this embodiment, a flange part is provided at the upper part of the annular pin slot 71, the spring 5 presses the top block 7, and there is no flange part at the lower end of the annular pin slot 71. Two pin positioning holes 12 are arranged side by side, and the pin (8) is a U-shaped pin.

[0042] The described valve core body 1 is made of conventional brass material, and a disassembly and assembly groove 13 is provided on the upper part of the outer side of the valve core body 1. There are six disassembly and assembly grooves 13, which are evenly distributed in a ring on the upper part of the outer side of the valve core body 1. There is no positioning cover in this embodiment, which can meet the positioning requirements of some electric actuators.

[0043] The described sealing ring 3 adopts a single O-ring structure.

[0044] A scale prevention rubber sleeve 18 is provided between the described top block 7 and the valve stem 2. The scale prevention rubber sleeve 18 is in a cylindrical shape, and there is a gap space 19 between the scale prevention rubber sleeve 18 and the valve stem 2. The gap space 19 can provide the space required for the folding of the cylindrical scale prevention rubber sleeve 18.

[0045] As shown in the Figure 7 Preferred Embodiment 3 shown. Embodiment 2 is generally the same as Embodiment 1. An improved structure of an automatic valve core for a water distributor or a heating valve includes a valve core body 1 with an actuator connection thread 10 and a valve body fixing thread 11. A valve stem 2 is provided on the central axis of the valve core body 1; a sealing ring, a snap ring, a spring 5 are sequentially arranged in the valve core body 1 from top to bottom along the valve stem 2, and a sealing valve flap 6 outside the valve core body 1; there is no connection port in the upper part of the inner cavity of the valve core body 1, and a top block 7 is provided at the lower end of the valve core body 1. The upper end surface 70 of the top block 7 is subjected to the thrust of the spring 5.

[0046] In this embodiment, sealing blocks 72 are provided inside and outside the top block 7, and the sealing blocks can also not be provided.

[0047] In this embodiment, the upper part of the sealing valve flap 6 is a valve seat 60, and the bottom of the valve seat 60 is an integral structure. The valve medium will not leak along the gap 62 of the fixed part 61 to the upper part of the valve seat 60. The gaps in Embodiments 1 and 2 extend to the upper part of the valve seat 60 and penetrate through. This embodiment has no hidden danger of leakage compared with other embodiments and the prior art.

[0048] As shown in the Figure 8 Preferred Embodiment 4 shown. The valve core body 1 includes an actuator connection thread 10 and a valve body fixing thread 11. An inner hexagonal structure is provided on the upper part of the outer side of the valve core body 1. The disassembly and assembly grooves 13 in both Embodiment 1 and Embodiment 4 are groove structures. Compared with the convex hexagonal structure, the groove structure has greater disassembly and assembly force and is not easily deformed. The valve core body 1 is made of high-temperature resistant plastic, and the groove structure is more suitable for disassembly and assembly.

[0049] The convex block at the lower part of the positioning cover cooperates with the disassembly and assembly groove 13 to achieve limit; the positioning cover covers the disassembly and assembly groove 13, and can cover it even with slight deformation. The appearance is good and beautiful during the use of the automatic valve core.

[0050] An improved structure of an automatic valve core for a water separator or a heating valve according to the present application breaks the convention. It eliminates the only upper sealing connection structure in the standard valve core structure, changes the material at the same time, further adjusts the structure due to the change of the material, changes the previous assembly and fixed connection methods, and meets the requirements of existing standard parts. At the same time, the product has better sealing performance and stronger market competitiveness. The structure of this product is novel and the design is practical, having the value of market promotion.

Claims

1. An improved structure of an automatic valve core for a water separator or a heating valve, comprising a valve core body (1) with an actuator connection thread (10) and a valve body fixing thread (11), and a valve rod (2) is arranged on the central axis of the valve core body (1); a sealing ring (3), a circlip (4), a spring (5) are sequentially arranged in the valve core body (1) from top to bottom along the valve rod (2), and a sealing valve flap (6) is arranged outside the valve core body (1); it is characterized in that: The upper part of the inner cavity of the valve core body (1) has no connection port. A top block (7) is provided at the lower end of the valve core body (1), and the upper end surface (70) of the top block (7) is subjected to the thrust of a spring (5). A pin positioning hole (12) is provided at the lower end of the valve core body (1), and an annular pin groove (71) is provided on the top block (7). A pin (8) fixes the top block (7) on the valve core body (1) through the pin positioning hole (12) and the annular pin groove (71). The valve core body (1) is made of high-temperature resistant plastic, and a disassembly and assembly groove (13) is provided on the upper part of the outer side of the valve core body (1). There are more than two disassembly and assembly grooves (13), which are evenly distributed annularly on the upper part of the outer side of the valve core body (1). A positioning cover (9) is provided on the upper part of the valve core body (1), and the positioning cover (9) is provided with a hexagonal structure (90). A convex block (91) is provided at the lower part of the positioning cover (9), and the convex block (91) cooperates with the disassembly and assembly groove (13) to achieve limit. The main body (92) of the positioning cover (9) covers the disassembly and assembly groove (13).

2. The improved structure of an automatic valve core for a water separator or a heating valve according to claim 1, characterized in that: There are two side-by-side pin positioning holes (12), and the pin (8) is a U-shaped pin.

3. The improved structure of an automatic valve core for a water separator or a heating valve according to claim 1, characterized in that: The top block (7) is fixed to the bottom of the valve core body (1) through a threaded structure.

4. An improved structure of an automatic valve core for a water separator or a heating valve according to claim 1, characterized in that: The sealing ring (3) adopts a double O-ring structure.

5. An improved structure of an automatic valve core for a water separator or a heating valve according to claim 1, characterized in that: An anti-scaling rubber sleeve (18) is provided between the top block (7) and the valve stem (2).

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