Embedded check valve

Abstract

The utility model relates to the technical field of check valves, in particular to an embedded check valve which comprises a valve body, a valve element assembly, a first sealing ring and a second sealing ring, the valve element assembly is connected to the upper portion in the valve body, the first sealing ring is arranged between the upper portion of the valve element assembly and the valve body, and the second sealing ring is arranged between the upper portion of the valve element assembly and the valve body. A second sealing ring is arranged between the middle of the valve element assembly and the valve body, an upper annular plate is arranged at the upper end of the valve body, a limiting groove is formed in the upper portion of the valve body, a lower annular plate is arranged at the lower end of the valve body, and the valve element assembly is composed of a pressing sleeve, a connecting frame, a limiting frame, a pull rod, a limiting sleeve, a reset spring, a telescopic rod and a valve element. A plurality of groups of limiting columns are arranged at the upper end of the first sealing ring.

Description

TECHNICAL FIELD

[0001] The utility model relates to check valve technical field, concretely is a kind of embedded check valve. BACKGROUND

[0002] The valve core of embedded check valve is inconvenient to replace after long time use abrasion, and the overall replacement cost is higher.

[0003] Therefore, it is necessary to design an embedded check valve to solve the problems in the above background technology. INVENTION CONTENTS

[0004] The utility model aims at solving the problems in prior art and provides an embedded check valve.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] An embedded check valve includes a valve body, a valve core assembly, a first sealing ring and a second sealing ring, the upper part of the valve body is connected with the valve core assembly, the first sealing ring is arranged between the upper part of the valve core assembly and the valve body, and the second sealing ring is arranged between the middle part of the valve core assembly and the valve body.

[0007] The upper end of the valve body is provided with an upper ring plate, the upper part of the valve body is provided with a limiting groove, and the lower end of the valve body is provided with a lower ring plate.

[0008] The valve core assembly is composed of a pressing sleeve, a connecting frame, a limiting frame, a pull rod, a limiting sleeve, a return spring, an extension rod and a valve core, the upper end of the valve core is connected with the extension rod, the extension rod is externally provided with the return spring, the upper end of the extension rod is connected with the limiting sleeve and the pull rod, the upper end of the pull rod is connected with the connecting frame, the upper part of the limiting sleeve is externally provided with a plurality of limiting frames, and the upper part of the limiting frame is provided with the pressing sleeve.

[0009] The upper end of the first sealing ring is provided with a plurality of limiting columns.

[0010] As a preferred scheme of the utility model, the first sealing ring, the pressing sleeve, the second sealing ring and the limiting groove are connected through sleeve connection.

[0011] As a preferred scheme of the utility model, the pull rod and the extension rod are connected through threaded fastening.

[0012] As a preferred scheme of the utility model, the pull rod is locked through a nut after passing through the limiting frame and the limiting sleeve.

[0013] As a preferred scheme of the utility model, the extension rod and the valve core are connected through bolts.

[0014] As a preferred scheme of the utility model, the lower end of the valve core and the valve body are connected through clamping connection.

[0015] In summary, the technical effects and advantages of the utility model: the embedded check valve, the first sealing ring, the pressing sleeve, the second sealing ring and the limiting groove are connected through sleeve joint, the sealing structure between the valve body and the valve core assembly is formed, and the wear of the connecting part is effectively reduced, the valve core assembly is a combined structure, convenient to assemble and overhaul later, and part replacement can be carried out according to the demand after overhaul, reduces the replacement cost, and the cooperation of the pull rod and the connecting frame makes the valve core keep stable when moving up and down, thereby reducing the valve core deviation. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the overall structural drawing of the utility model;

[0017] Figure 2 It is the valve body structure drawing of the utility model;

[0018] Figure 3 It is the overall cross section structure drawing of the utility model;

[0019] Figure 4 It is the first sealing ring structure drawing of the utility model;

[0020] Figure 5 It is the valve core assembly structure drawing of the utility model;

[0021] Figure 6 It is the second sealing ring structure drawing of the utility model.

[0022] In the drawing: 1, valve body;101, upper ring plate;102, lower ring plate;103, limiting groove;2, valve core assembly;201, pressing sleeve;202, connecting frame;203, limiting frame;204, pull rod;205, limiting sleeve;206, reset spring;207, telescopic rod;208, valve core;3, first sealing ring;301, limiting column;4, second sealing ring. DETAILED DESCRIPTION

[0023] The technical schemes in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model, obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0024] REFERENCE Figures 1-6The utility model provides an embedded check valve, including valve body 1, valve core subassembly 2, first sealing ring 3 and second sealing ring 4, the upper portion inside valve body 1 is connected with valve core subassembly 2, and the upper portion between valve core subassembly 2 and valve body 1 is equipped with first sealing ring 3, and the intermediate place between valve core subassembly 2 and valve body 1 is equipped with second sealing ring 4, the upper end of valve body 1 is equipped with upper ring plate 101, the upper portion of valve body 1 is equipped with limit groove 103, and the lower end of valve body 1 is equipped with lower ring plate 102, valve core subassembly 2 is composed of pressing sleeve 201, connecting frame 202, limit frame 203, pull rod 204, limit sleeve 205, reset spring 206, telescopic rod 207 and valve core 208, and the upper end of valve core 208 is connected with telescopic rod 207, the outside of telescopic rod 207 is equipped with reset spring 206, the upper end of telescopic rod 207 is connected with limit sleeve 205 and pull rod 204, the upper end of pull rod 204 is connected with connecting frame 202, the outside of limit sleeve 205 is equipped with multiple limit frame 203, and the upper portion of limit frame 203 is equipped with pressing sleeve 201, the upper end of first sealing ring 3 is equipped with multiple limit column 301.

[0025] Referring to Figures 1-6 , first sealing ring 3, pressing sleeve 201, second sealing ring 4 and limit groove 103 are connected through sleeve connection, forming the sealing structure between valve body 1 and valve core subassembly 2, and effectively reducing the wear of the connection.

[0026] Referring to Figures 1-6 , the valve core of the embedded check valve is inconvenient to replace after long-term use, and the overall replacement cost is high, the pull rod 204 and the telescopic rod 207 are connected through thread tightening, the pull rod 204 is locked through the nut after passing through the limit frame 203 and the limit sleeve 205, the telescopic rod 207 and the valve core 208 are connected through bolts, the lower end of the valve core 208 and the valve body 1 are connected through clamping, the valve core subassembly 2 is a combined structure, which is convenient to assemble and maintain later, and can be replaced partially according to the needs after maintenance, reducing the replacement cost, and the pull rod 204 and the connecting frame 202 are used in cooperation to make the valve core 208 move up and down stably, thereby reducing the deviation of the valve core 208.

[0027] Working principle: the first sealing ring 3, the pressing sleeve 201, the second sealing ring 4 and the limit groove 103 of the embedded check valve are connected through sleeve connection, forming the sealing structure between the valve body 1 and the valve core subassembly 2, and effectively reducing the wear of the connection, the pull rod 204 and the telescopic rod 207 are connected through thread tightening, the pull rod 204 is locked through the nut after passing through the limit frame 203 and the limit sleeve 205, the telescopic rod 207 and the valve core 208 are connected through bolts, the lower end of the valve core 208 and the valve body 1 are connected through clamping, the valve core subassembly 2 is a combined structure, which is convenient to assemble and maintain later, and can be replaced partially according to the needs after maintenance, reducing the replacement cost, and the pull rod 204 and the connecting frame 202 are used in cooperation to make the valve core 208 move up and down stably, thereby reducing the deviation of the valve core 208.

[0028] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the present application, which should be limited only by the appended claims and their equivalents.

Claims

1. An embedded check valve comprising a valve body (1), a valve core assembly (2), a first sealing ring (3) and a second sealing ring (4), characterized in that: The upper part of the valve body (1) is connected with a valve core assembly (2), a first sealing ring (3) is arranged between the upper part of the valve core assembly (2) and the valve body (1), and a second sealing ring (4) is arranged between the middle part of the valve core assembly (2) and the valve body (1); The upper end of the valve body (1) is provided with an upper ring plate (101), the upper part of the valve body (1) is provided with a limiting groove (103), and the lower end of the valve body (1) is provided with a lower ring plate (102); The valve core assembly (2) is composed of a pressing sleeve (201), a connecting frame (202), a limiting frame (203), a pull rod (204), a limiting sleeve (205), a reset spring (206), an extension rod (207) and a valve core (208), the upper end of the valve core (208) is connected with the extension rod (207), the outer part of the extension rod (207) is provided with the reset spring (206), the upper end of the extension rod (207) is connected with the limiting sleeve (205) and the pull rod (204), the upper end of the pull rod (204) is connected with the connecting frame (202), the outer part of the limiting sleeve (205) is provided with a plurality of limiting frames (203), the upper part of the limiting frame (203) is provided with the pressing sleeve (201); The upper end of the first sealing ring (3) is provided with a plurality of limiting columns (301).

2. An embedded check valve according to claim 1, wherein: The first sealing ring (3), the pressing sleeve (201), the second sealing ring (4) and the limiting groove (103) are connected through sleeve connection.

3. An embedded check valve according to claim 1, wherein: The pull rod (204) and the extension rod (207) are connected through threaded rotation.

4. An embedded check valve according to claim 1, wherein: The pull rod (204) passes through the limiting frame (203) and the limiting sleeve (205) and is locked through a nut.

5. An embedded check valve according to claim 1, wherein: The extension rod (207) and the valve core (208) are connected through bolts.

6. An embedded check valve according to claim 1, wherein: The lower end of the valve core (208) and the valve body (1) are connected through clamping connection.

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