Magnetic diaphragm type filling valve

Abstract

The invention discloses a magnetic suction diaphragm type filling valve which comprises a valve body, a limiting support is arranged at the front end of the inner side of the valve body, a valve element is arranged on the rear side of the limiting support, a diaphragm is arranged at the rear end of the limiting support in a sliding mode, a permanent magnet is arranged in the center of the interior of the valve element, and a sealing screw is arranged at the rear end of the valve body. A spring structure is optimized and canceled, so that leakage caused by failure of the spring is reduced; the circulation amount is increased, and the filling efficiency is improved; and the structure is compact, the diaphragm returns smoothly and quickly, sealing is stable, and practicability is high.

Description

Technical Field

[0001] The present invention belongs to the technical field of refrigeration equipment accessories, and specifically relates to a magnetic adsorption diaphragm type filling valve. Background Art

[0002] The process of filling gas or liquid from one container to another usually requires a connection channel to be set between the two containers. Currently, in large refrigeration equipment systems, there is usually a filling valve with a large flow rate and rapid fluid filling function with an opening and closing function.

[0003] The filling valve has the functions of adding refrigerant to the system and inspection. Existing filling valves generally use a spring to push the sealing ring to move to achieve opening and closing, and the sealing ring needs to be compressed to play a sealing role. When the spring fails due to insufficient rigidity or fatigue, it cannot push the sealing ring to seal. At the same time, when the spring is not perpendicular to the sealing surface, it will cause uneven stress and local leakage problems. Therefore, how to develop a filling valve that does not require a spring and a sealing ring for sealing and can quickly and stably return to its position is an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0004] The purpose of the present invention is to overcome the defects of the prior art and provide a magnetic adsorption diaphragm type filling valve.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A magnetic adsorption diaphragm type filling valve includes a valve body. A limit bracket is provided at the front end inside the valve body. A valve core is provided behind the limit bracket. A diaphragm is slidably provided at the rear end of the limit bracket. A permanent magnet is provided at the center of the valve core. A sealing screw is provided at the rear end of the valve body.

[0007] Preferably, the valve body is machined and formed from brass or other non-magnetic metal materials. A quick-connect interface is provided at the rear end of the outer end face of the valve body for connection during filling. A sealing thread is provided at the front end of the outer end face of the valve body, and its thread profile matches the thread profile of the installation equipment. A plugging thread is provided on the inner end face of the valve body, and the thread profile of the plugging thread matches the thread profile of the sealing screw.

[0008] Preferably, a sealing member installation groove is provided on the outer side of the valve core, and a sealing member is provided therein. A sealing step is provided at the end of the valve core. A flow-through hole is provided at the center of the valve core, and the permanent magnet is provided in the flow-through hole.

[0009] Preferably, the sealing member is an O-ring, and its material is rubber. The outer diameter of the sealing member is slightly larger than the inner diameter of the inner cavity of the valve body, and sealing is achieved by compressing the sealing member.

[0010] Preferably, the permanent magnet is strip-shaped, with its length slightly greater than the inner diameter of the valve core. A guiding conical angle is provided on the end face of the magnetic strip, and it is assembled in the flow hole of the valve core through pressing. The end face of the permanent magnet is located within the sealing step.

[0011] Preferably, a number of columns are arranged in a circular array on the rear side of the limit bracket. The diaphragm is slidably connected to the number of columns, and a limit step is provided on the columns to limit the sliding distance of the diaphragm.

[0012] Preferably, a flow hole is provided at the center of the limit bracket, and a cavity is formed by the gaps outside the number of columns.

[0013] Preferably, the diaphragm includes a steel sheet, and a corrosion-resistant rubber is sprayed on the rear side of the steel sheet for cooperating with the sealing step to achieve sealing.

[0014] Preferably, a seal is provided at the connection between the valve body and the sealing screw, and the seal is sleeved outside the sealing screw.

[0015] Preferably, a press opening is formed by inward extrusion at the front end of the valve body for fixing the inner cavity parts.

[0016] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present invention are as follows:

[0017] In the present invention, by optimizing and canceling the spring structure, the leakage caused by spring failure is reduced; the flow rate is increased, and the filling efficiency is improved; and the structure is compact, the diaphragm returns smoothly and quickly, the sealing is stable, and the practicability is strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the present invention

[0019] Figure 2 is an enlarged schematic view of part I;

[0020] Figure 3 is a schematic diagram of the medium flow during the filling of the present invention (filling state);

[0021] Figure 4 is a schematic diagram of the internal medium flow of the refrigeration equipment after the filling of the present invention (closed state);

[0022] Figure 5 is an exploded schematic structural diagram of the present invention.

[0023] Reference numerals: 1, valve body; 1-1, rear end of the outer end face of the valve body; 1-2, inner end face of the valve body; 1-3, front end of the outer end face of the valve body; 1-4, pressing port; 2, valve core; 2-1, sealing member installation groove; 2-2, sealing member; 2-3, sealing step; 2-4, valve core through hole; 3, permanent magnet; 4, diaphragm; 4-1, steel sheet; 4-2, corrosion-resistant rubber; 5, limit bracket; 5-1, column; 5-2, limit step; 5-3, cavity; 5-4, flow hole; 6, sealing screw; 6-1, sealing member; 6-2, thread tooth. Detailed implementation manners

[0024] The following is a detailed description of the specific implementation manners of the present invention.

[0025] The "range" disclosed in the present invention is defined in the form of a lower limit and an upper limit. A given range is defined by selecting a lower limit and an upper limit, and the selected lower limit and upper limit define the boundary of a specific range. The range defined in this way can include the end values or not include the end values, and can be combined arbitrarily, that is, any lower limit can be combined with any upper limit to form a range. For example, if a range of 10 to 50 is listed for a specific parameter, ranges of 10 to 40 and 20 to 50 are also contemplated. In addition, if the minimum range values 1 and 2 are listed, and if the maximum range values 3, 4, and 5 are listed, then the following ranges are all contemplated: 1 to 3, 1 to 4, 1 to 5, 2 to 3, 2 to 4, and 2 to 5. In this application, unless otherwise specified, the numerical range "a to b" represents an abbreviated representation of any real number combination between a and b, where a and b are both real numbers. For example, the numerical range "0 to 5" means that all real numbers between "0 to 5" have been fully listed in this article, and "0 to 5" is only an abbreviated representation of these numerical combinations.

[0026] If there is no special instruction, all implementation manners and optional implementation manners of this application can be combined with each other to form a new technical solution.

[0027] If there is no special instruction, all technical features and optional technical features of this application can be combined with each other to form a new technical solution.

[0028] Unless otherwise specified, all steps of this application can be carried out sequentially or randomly, preferably sequentially. For example, the method includes steps (a) and (b), which means that the method may include steps (a) and (b) carried out sequentially, or may include steps (b) and (a) carried out sequentially. For example, when it is mentioned that the method may further include step (c), it means that step (c) can be added to the method in any order. For example, the method may include steps (a), (b) and (c), or may include steps (a), (c) and (b), or may include steps (c), (a) and (b), etc.

[0029] Unless otherwise specified, "including" and "comprising" mentioned in this application mean open-ended, and can also be closed-ended. For example, "including" and "comprising" can mean that other components not listed may also be included or comprised, or may only include or comprise the listed components.

[0030] Unless otherwise specified, the reaction is carried out under normal temperature and pressure conditions.

[0031] Unless otherwise specified, all parts or percentages are by weight or weight percentage.

[0032] In the present invention, the substances used are all known substances, which can be purchased or synthesized by known methods.

[0033] In the present invention, the devices or equipment used are all conventional devices or equipment known in the field and can be purchased.

[0034] The following further illustrates the specific implementation manner of a magnetic adsorption diaphragm type filling valve of the present invention in conjunction with embodiments. The magnetic adsorption diaphragm type filling valve of the present invention is not limited to the descriptions of the following embodiments.

[0035] Embodiment:

[0036] A magnetic adsorption diaphragm type filling valve, as Figures 1-5 shown, includes a valve body 1. A limit bracket 5 is provided at the front end inside the valve body 1. A valve core 2 is provided at the rear side of the limit bracket 5. A diaphragm 4 is slidably provided at the rear end of the limit bracket 5. A permanent magnet 3 is provided at the center inside the valve core 2. A sealing screw 6 is provided at the rear end of the valve body 1.

[0037] In a possible implementation manner, the valve body 1 is machined and formed from brass or other non-magnetic metal materials. A quick-connect interface 1-1 is provided at the rear end of the outer end face of the valve body for connection during filling; a sealing thread 1-3 is provided at the front end of the outer end face of the valve body, and its thread profile matches the thread profile of the installation equipment; a plugging thread 1-2 is provided on the inner end face of the valve body, and the thread profile of the plugging thread matches the thread profile 6-2 of the sealing screw 6.

[0038] In a possible implementation, a seal installation groove 2-1 is provided on the outer side of the valve core 2, a seal 2-2 is arranged therein, a seal step 2-3 is provided at the end of the valve core 2, a flow-through hole is provided at the center of the valve core 2, and a permanent magnet 3 is arranged in the flow-through hole.

[0039] In a possible implementation, the seal 2-2 is an O-ring, its material is rubber, the outer diameter of the seal 2-2 is slightly larger than the inner diameter of the inner cavity of the valve body 1, and sealing is achieved by compressing the seal 2-2.

[0040] In a possible implementation, the permanent magnet 3 is strip-shaped, its length is slightly larger than the inner diameter of the valve core 2, a guiding taper angle is provided on the end face of the magnetic strip, it is assembled in the flow-through hole of the valve core 2 by pressing, and the end face of the permanent magnet 3 is located within the seal step 2-3.

[0041] In a possible implementation, a number of upright columns 5-1 are arranged in a circular array on the rear side of the limit bracket 5, the diaphragm 4 is slidably connected to the number of upright columns 5-1, and a limit step 5-1 is provided on the upright column 5-1 for limiting the sliding distance of the diaphragm 4.

[0042] In a possible implementation, a flow-through hole 5-4 is provided at the center of the limit bracket 5, and a cavity 5-3 is formed by the gaps outside the number of upright columns 5-1.

[0043] In a possible implementation, the diaphragm 4 includes a steel sheet 4-1, and a corrosion-resistant rubber 4-2 is sprayed on the rear side of the steel sheet 4-1 for cooperating with the seal step 2-3 to achieve sealing.

[0044] In a possible implementation, a seal 6-1 is provided at the connection between the valve body 1 and the seal screw 6, and the seal 6-1 is sleeved outside the seal screw 6.

[0045] In a possible implementation, a crimp 1-4 is formed at the front end of the valve body 1 by inward extrusion for fixing the inner cavity parts.

[0046] In a possible implementation, the magnetic diaphragm filling valve includes a valve body 1 made of brass or other non-magnetic metal materials, connection ports are provided at both ends of the valve body 1, one end is connected to the refrigeration equipment pipeline, and a quick connection port is provided at the other end for connecting the filling raw material device;

[0047] Further, a valve seat installation cavity is provided inside the valve body 1 for installing the valve seat. The valve seat is fixed, the circumference is sealed with a sealing ring, and the valve seat is provided with a large-diameter flow-through hole, and a high-precision convex step is provided along the outer edge of the hole for end face sealing;

[0048] Further, a thin-walled sheet-shaped rubberized steel sheet is installed above the valve seat, the rubberized material is hydrogenated nitrile rubber, the surface is required to be flat and smooth, the rubberized steel sheet has magnetic attraction characteristics, and the thin-walled rubberized steel sheet is simply called a diaphragm;

[0049] Further, to restrict the up and down axial movement of the diaphragm inside the valve body, an aluminum or non-magnetic limiting bracket 5 is installed inside the valve body 1, which does not affect the adsorption of the permanent magnet on the diaphragm. The bracket is provided with 4 limiting posts 5-1, and limiting steps 5-2 are provided on the limiting posts 5-1; the limiting bracket 5 is provided with a circulation hole 5-4;

[0050] Further, one end of the valve body 1 is designed with a sealing screw 6 for secondary sealing. The sealing screw 6 is assembled with a rubber sealing gasket and is sealed by locking and compressing.

[0051] Working principle: As Figures 1-5 shown, as Figure 1 shown, the magnetic adsorption filling valve includes a valve body 1, a fixed valve core 2, a permanent magnet 3, a diaphragm 4, a limiting bracket 5, and a sealing screw 6;

[0052] Further, the valve body 1 is made of brass or non-magnetic metal material through machining. A standard quick-connect interface is machined at the outer part 1-1 of the valve body end face for connection during filling; a sealing thread tooth is machined at the outer part 1-3 of the valve body end face, and the tooth profile matches the thread tooth of the installation equipment; a thread tooth is machined at the inner part 1-2 of the valve body end face, and the thread tooth of the valve body matches the thread tooth 6-2 of the sealing screw 6 in a press-fit manner;

[0053] Further, a fixed valve core 2 is installed inside the valve body. The valve core is provided with a sealing element installation groove 2-1 and a sealing element 2-2. The sealing element is an O-ring made of rubber. The sealing ring is arranged in the valve core installation groove; the outer diameter of the sealing element is slightly larger than the inner cavity of the valve body, and sealing is achieved by compressing the sealing element; a sealing step 2-3 is provided at the end of the valve core, and the width and height of the step are determined according to actual needs; the valve core is provided with a circulation hole, and a permanent magnet 3 is installed in the circulation hole. The permanent magnet is in a long strip shape, and its length is slightly larger than the inner diameter of the valve core. A guiding cone angle is provided at the end face of the magnetic strip, and it is press-fitted tightly in the circulation hole of the valve core. After the permanent magnet is installed, its end face is lower than the sealing step 2-3;

[0054] Further, the opening and closing structure mainly realizes the sealing and closing by using the permanent magnet 3 fixed on the valve core 2 to magnetically adsorb the rubber-coated steel sheet 4. To ensure the sealing reliability, hydrogenated nitrile rubber or other corrosion-resistant rubber 4-2 is sprayed on the steel sheet 4-1. The thickness of the steel sheet 4-1 is between 0.4-1 mm, and in this case, 0.6 mm is adopted. The rubber-coated steel sheet is simply called the diaphragm;

[0055] Furthermore, to ensure the stability of the axial movement of the diaphragm 4 inside the valve body, a limiting bracket 5 is installed in the valve inner cavity. The material of the limiting bracket is aluminum or non-magnetic material. The bracket is provided with 3-6 circumferentially equally spaced columns 5-1. In this case, 4 columns are provided. Each column is provided with a limiting step 5-2 that matches the diaphragm. The steps are arranged in a circular shape with a diameter slightly larger than the outer diameter of the diaphragm to ensure smooth movement of the diaphragm. The axial length of the steps is set according to actual needs; the outer pitch diameter of the circumferentially equally spaced columns is smaller than the outer diameter of the installation of the bracket and the valve body. The limiting diameter is provided with a flow hole 5-4;

[0056] Furthermore, after the above-mentioned valve body 1, fixed valve core 2, permanent magnet 3, adhesive-coated steel sheet 4, and limiting bracket 5 are assembled, a crimp 1-4 is formed by inward extrusion at the end of the valve body 1 close to the limiting bracket to prevent the inner cavity parts from loosening; at the same time, a sealing screw 6 is installed at the other end of the valve body to provide secondary sealing in case of leakage at the diaphragm;

[0057] Furthermore, when the valve body is being filled, as Figure 3 shown, the diaphragm moves axially to the step of the limiting bracket under the thrust of the filling medium. At this time, the medium enters the cavity 5-3 between the limiting bracket and the valve body column through the valve core through-hole 2-4, and then enters the interior of the refrigeration equipment pipeline through the flow hole 5-4 between the limits to achieve filling; when filling stops, the diaphragm is as Figure 2 shown in Figure 4 and is adsorbed by the permanent magnet and in a closed state, and the medium inside the pipeline cannot flow out;

[0058] Furthermore, to prevent the sealing between the diaphragm and the fixed valve core from failing, a sealing screw 6 is installed on the end face of the valve body. By axially pressing the seal 6-1, double-layer sealing is achieved;

[0059] The above content is a further detailed description of the present invention in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or substitutions can be made, and all should be regarded as belonging to the protection scope of the present invention.

Claims

1. A magnetic diaphragm filling valve, characterized in that: The valve body (1) comprises a valve body (1), wherein a limit bracket (5) is provided at the front end of the inner side of the valve body (1), a valve core (2) is provided at the rear side of the limit bracket (5), a diaphragm (4) is slidably provided at the rear end of the limit bracket (5), a permanent magnet (3) is provided at the center of the valve core (2), and a sealing screw (6) is provided at the rear end of the valve body (1).

2. A magnetic diaphragm filling valve as claimed in claim 1, characterized in that: The valve body (1) is machined and formed of brass or other non-magnetic metal materials, and a quick-connect interface is provided at the rear end (1-1) of the outer end face of the valve body for connection during filling; a sealing thread is provided at the front end (1-3) of the outer end face of the valve body, and its thread profile matches that of the installed equipment; a plugging thread is provided at the inner end face (1-2) of the valve body, and the plugging thread matches the thread profile of the thread (6-2) of the sealing screw (6).

3. A magnetic diaphragm filling valve as claimed in claim 1, characterized in that: The outer side of the valve core (2) is provided with a sealing member installation groove (2-1), in which a sealing member (2-2) is arranged; the end of the valve core (2) is provided with a sealing step (2-3); the center of the valve core (2) is provided with a flow hole, and a permanent magnet (3) is arranged in the flow hole.

4. A magnetic diaphragm filling valve as claimed in claim 3, characterized in that: The sealing member (2-2) is an O-ring made of rubber. The outer diameter of the sealing member (2-2) is slightly larger than the inner diameter of the inner cavity of the valve body (1). Sealing is achieved by compressing the sealing member (2-2).

5. A magnetic diaphragm filling valve as claimed in claim 3, characterized in that: The permanent magnet (3) is in the shape of a long strip, with a length slightly larger than the inner diameter of the valve core (2). The end face of the magnetic strip is provided with a guide cone angle and is assembled in the flow hole of the valve core (2) by pressing. The end face of the permanent magnet (3) is located in the sealing step (2-3).

6. A magnetic diaphragm filling valve as claimed in claim 1, characterized in that: A plurality of columns (5-1) are arranged in a circular array on the rear side of the limiting bracket (5), the diaphragm (4) is slidably connected to the plurality of columns (5-1), and a limiting step (5-1) is arranged on the column (5-1) for limiting the sliding distance of the diaphragm (4).

7. A magnetic diaphragm filling valve as claimed in claim 1, characterized in that: A flow hole (5-4) is provided at the center of the position-limiting bracket (5), and gaps outside a plurality of the upright posts (5-1) form a cavity (5-3).

8. The magnetic diaphragm filling valve according to claim 1, characterized in that: The diaphragm (4) comprises a steel sheet (4-1), the rear side of which is sprayed with corrosion-resistant rubber (4-2) for cooperating with a sealing step (2-3) to achieve sealing.

9. The magnetic diaphragm filling valve according to claim 1, characterized in that: A sealing member (6-1) is provided at the connection between the valve body (1) and the sealing screw (6), and the sealing member (6-1) is sleeved on the outside of the sealing screw (6).

10. The magnetic diaphragm filling valve according to claim 1, characterized in that: The front end of the valve body (1) is pressed inward to form a pressure port (1-4) for fixing the inner cavity parts.

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