Check valve with valve element capable of being replaced quickly

Abstract

The check valve comprises a check valve body, a valve element assembly and a flange cover, the flange cover is connected with the valve element assembly, a flange plate is arranged on the check valve body, the flange cover is connected with the flange plate, the valve element assembly comprises a valve element body and a first connecting block, and the valve element body and the first connecting block are connected. Sliding grooves are formed in the valve element body and the first connecting block, a valve rod is installed in the sliding grooves in a sliding mode, a second connecting block is arranged on the valve rod, a compression spring is arranged between the first connecting block and the second connecting block, and the valve rod is sleeved with the compression spring. According to the utility model, a worker can conveniently disassemble and replace the valve core, the labor intensity of the worker in the operation process is reduced, and the replacement efficiency is improved. By rotating the adjusting sleeve, the second connecting block ascends and descends under the action of the second threaded part and the second threaded hole, the elastic force of the compression spring can be adjusted, then the flow of the check valve is controlled, and the practicability of the device is improved.

Description

Technical Field

[0001] The utility model mainly relates to the technical field of manual check valves, in particular to a check valve with a valve core that can be quickly replaced. Background Art

[0002] A check valve is also called a non-return valve. The function of this type of valve is to allow the medium to flow in one direction only and prevent the flow in the other direction. Usually this type of valve works automatically. Under the pressure of the fluid flowing in one direction, the valve disc opens; when the fluid flows in the opposite direction, the fluid pressure and the self-reclosing valve disc act on the valve seat, thereby cutting off the flow.

[0003] For example, the Chinese patent publication number CN210372150U provides a fluorine-lined flange manual check valve that is easy to replace the valve core, including a valve body, a valve core installed inside the valve body, a ring welded on the inner side of the top of the valve body, and a sealing plate installed on the top of the valve body. The outer clamping plate and the inner clamping plate welded on the outer edge and inner edge of the sealing plate are pressed into the semi-slot, and the sealing plate is rotated to make the sealing plate clamped into the top of the valve body, so that the sealing plate and the valve body are fixed. When replacing the valve core in the above application, the sealing plate needs to be rotated, and the clamping plate presses the pressure plate into the top of the sealing plate through the rotating shaft, so that the sealing plate is squeezed with the valve body through the sealing ring to achieve sealing. At the same time, a locking plate is welded on the top of the clamping plate, and a fixing rod is inserted inside the locking plate, and the two ends of the fixing rod are locked and fixed by bolts. It is also necessary to remove the bolts on both sides of the locking plate, and open the clamping plate to make the sealing plate movable. The valve core in the above application is relatively inconvenient to replace, and it is also inconvenient to control the flow rate of the valve. Utility Model Content

[0004] 1. Technical problems to be solved by the utility model:

[0005] The utility model provides a check valve with a quickly replaceable valve core, which is used to solve the technical problems existing in the above-mentioned background technology.

[0006] 2. Technical solution:

[0007] To achieve the above-mentioned purpose, the technical solution provided by the utility model is: a check valve with quick valve core replacement, comprising a check valve body, a valve core assembly and a flange cover, the flange cover is connected to the valve core assembly, the check valve body is provided with a flange plate, the flange cover is connected to the flange plate, the valve core assembly comprises a connected valve core body and a first connecting block, the valve core body and the first connecting block are provided with a slide groove, a valve stem is slidably installed in the slide groove, a second connecting block is provided on the valve stem, a compression spring is provided between the first connecting block and the second connecting block, and the compression spring is sleeved on the valve stem.

[0008] Preferably, a positioning groove is provided on the flange plate, a positioning plate matching the positioning groove is provided on the flange cover, and connecting holes are provided on the flange cover and the flange plate.

[0009] Preferably, a third threaded hole is provided at the center of the lower end of the flange cover, a third threaded portion matching the third threaded hole is provided at the upper end of the valve core assembly, and the third threaded portion is provided at the upper end of the second connecting block.

[0010] Preferably, a first installation groove for installing a compression spring is formed at the upper end of the first connecting block, a installation sleeve is provided at the center of the first installation groove, a sealing ring is provided on the inner wall of the installation sleeve, and the sealing ring is sleeved on the valve stem.

[0011] Preferably, a first threaded portion is disposed at the lower end of the first connecting block, and a first threaded hole matching with the first threaded portion is disposed at the upper end of the valve core body.

[0012] Preferably, the second connecting block includes an adjusting sleeve, the valve stem is provided with a second threaded portion, a second threaded hole matching with the second threaded portion is provided inside the adjusting sleeve, and the second connecting block is provided with a second mounting groove for mounting a compression spring.

[0013] 3. Beneficial effects:

[0014] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects:

[0015] When the valve core needs to be replaced, the flange cover is removed from the flange plate, and the valve core assembly can be removed. The valve core assembly and the flange cover are threadedly connected through the third threaded portion and the third threaded hole, which is convenient for disassembly. If only the valve core body needs to be replaced, the first connecting block and the valve core body can also be quickly removed through the first threaded portion and the first threaded hole. The utility model can facilitate the staff to disassemble and replace the valve core, reduce the labor intensity of the staff during the operation process, improve the replacement efficiency, and is suitable for promotion in a wide range.

[0016] The valve core assembly of the utility model is provided with a compression spring between the first connecting block and the second connecting block. The compression spring is sleeved on the valve stem. By rotating the adjusting sleeve, the second connecting block is raised and lowered under the action of the second threaded portion and the second threaded hole, the elastic force of the compression spring can be adjusted, thereby controlling the flow rate of the check valve and increasing the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall explosion structure of the utility model;

[0018] Figure 2This is a schematic diagram of the connection structure between the flange cover and the valve core assembly of the utility model;

[0019] Figure 3 This is a schematic diagram of the valve core assembly structure at one angle of the utility model;

[0020] Figure 4 This is a schematic diagram of the core assembly structure of another angle valve of the utility model;

[0021] Figure 5 It is a schematic structural diagram of the valve core body and the first connecting block of the utility model.

[0022] Reference numerals:

[0023] 1. Check valve body; 11. Flange; 12. Positioning groove; 2. Valve core assembly; 21. Valve core body; 22. First connecting block; 221. First mounting groove; 222. Mounting sleeve; 223. Sealing ring; 224. First threaded portion; 225. First threaded hole; 23. Valve stem; 24. Second connecting block; 241. Adjusting sleeve; 242. Second threaded portion; 243. Second mounting groove; 25. Third threaded portion; 26. Compression spring; 27. Slide groove; 3. Flange cover; 31. Third threaded hole; 32. Connecting hole; 33. Positioning plate. DETAILED DESCRIPTION

[0024] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "page", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 invention.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0027] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", "provided with", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] It should be noted that the structures not introduced in the present invention are not related to the design points and improvement directions of the present invention, and are the same as the prior art or can be implemented by using the prior art, and will not be described in detail here. Example

[0029] See attached Figures 1 to 5 A check valve with quick valve core replacement includes a check valve body 1, a valve core assembly 2 and a flange cover 3. The flange cover 3 is connected to the valve core assembly 2. The check valve body 1 is provided with a flange 11. The flange cover 3 is connected to the flange 11. The valve core assembly 2 includes a valve core body 21 and a first connecting block 22 connected to each other. A slide groove 27 is provided on the valve core body 21 and the first connecting block 22. A valve stem 23 is slidably installed in the slide groove 27. A second connecting block 24 is provided on the valve stem 23. A compression spring 26 is provided between the first connecting block 22 and the second connecting block 24. The compression spring 26 is sleeved on the valve stem 23.

[0030] The flange 11 is provided with a positioning groove 12, the flange cover 3 is provided with a positioning plate 33 matched with the positioning groove 12, and the flange cover 3 and the flange 11 are provided with connecting holes 32. When installing the flange cover 3, the positioning plate 33 and the positioning groove 12 can be quickly positioned, and then fixed through the connecting holes 32 and bolts.

[0031] A third threaded hole 31 is provided at the center of the lower end of the flange cover 3 , and a third threaded portion 25 matching the third threaded hole 31 is provided at the upper end of the valve core assembly 2 . The third threaded portion 25 is provided at the upper end of the second connecting block 24 .

[0032] The first connection block 22 has a first installation groove 221 at its upper end for installing the compression spring 26. In one embodiment, a mounting sleeve 222 is provided at the center of the first installation groove 221, and a sealing ring 223 is provided on the inner wall of the mounting sleeve 222. The sealing ring 223 is sleeved on the valve stem 23. The provision of the sealing ring 223 can effectively reduce the penetration of liquid into the valve core body 21 and the first connection block 22, prevent corrosion of the valve core body 21, and reduce the frequency of replacing the valve core body 21.

[0033] A first threaded portion 224 is disposed at the lower end of the first connection block 22 , and a first threaded hole 225 matched with the first threaded portion 224 is disposed at the upper end of the valve core body 21 .

[0034] The second connection block 24 includes an adjustment sleeve 241, a second threaded portion 242 is provided on the valve stem 23, a second threaded hole matching the second threaded portion 242 is provided inside the adjustment sleeve 241, and a second installation groove 243 for installing the compression spring 26 is provided on the second connection block 24. The upper and lower ends of the compression spring 26 are respectively arranged in the first installation groove 221 and the second installation groove 243.

[0035] Working principle:

[0036] When the valve core needs to be replaced, the flange cover 3 is removed from the flange plate 11, and the valve core assembly 2 can be removed. The valve core assembly 2 and the flange cover 3 are threadedly connected through the third threaded portion 25 and the third threaded hole 31, which is convenient for disassembly. If only the valve core body 21 needs to be replaced, the first connecting block 22 and the valve core body 21 can also be quickly removed through the first threaded portion 224 and the first threaded hole 225.

[0037] The valve core assembly 2 is provided with a compression spring 26 between the first connecting block 22 and the second connecting block 24. The compression spring 26 is sleeved on the valve stem 23. By rotating the adjusting sleeve 241, under the action of the second threaded portion 242 and the second threaded hole, the second connecting block 24 is raised and lowered, and the elastic force of the compression spring 26 can be adjusted, thereby controlling the flow rate of the check valve and increasing the practicality of the device.

[0038] The above-described embodiments only express a certain implementation method of the utility model, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the patent of the utility model shall be based on the attached claims.

Claims

1. A check valve with a quick valve core replacement, characterized in that: The invention comprises a check valve body (1), a valve core assembly (2) and a flange cover (3), wherein the flange cover (3) is connected to the valve core assembly (2), the check valve body (1) is provided with a flange plate (11), the flange cover (3) is connected to the flange plate (11), the valve core assembly (2) comprises a valve core body (21) and a first connecting block (22) connected to each other, a slide groove (27) is provided on the valve core body (21) and the first connecting block (22), a valve stem (23) is slidably mounted in the slide groove (27), a second connecting block (24) is provided on the valve stem (23), a compression spring (26) is provided between the first connecting block (22) and the second connecting block (24), and the compression spring (26) is sleeved on the valve stem (23).

2. A check valve with a quick valve core replacement according to claim 1, characterized in that: The flange (11) is provided with a positioning groove (12), the flange cover (3) is provided with a positioning plate (33) matching the positioning groove (12), and the flange cover (3) and the flange (11) are provided with connecting holes (32).

3. A check valve with a quick valve core replacement according to claim 1, characterized in that: A third threaded hole (31) is provided at the center of the lower end of the flange cover (3), a third threaded portion (25) matching the third threaded hole (31) is provided at the upper end of the valve core assembly (2), and the third threaded portion (25) is provided at the upper end of the second connecting block (24).

4. A check valve with a quick valve core replacement according to claim 1, characterized in that: A first mounting groove (221) for mounting a compression spring (26) is formed at the upper end of the first connecting block (22); a mounting sleeve (222) is provided at the center of the first mounting groove (221); a sealing ring (223) is provided on the inner wall of the mounting sleeve (222); and the sealing ring (223) is sleeved on the valve stem (23).

5. A check valve with a quick valve core replacement according to claim 1, characterized in that: The lower end of the first connection block (22) is provided with a first threaded portion (224), and the upper end of the valve core body (21) is provided with a first threaded hole (225) matching with the first threaded portion (224).

6. A check valve with a quick valve core replacement according to claim 4, characterized in that: The second connecting block (24) comprises an adjusting sleeve (241), the valve stem (23) is provided with a second threaded portion (242), a second threaded hole matching the second threaded portion (242) is provided inside the adjusting sleeve (241), and a second mounting groove (243) for mounting a compression spring (26) is provided on the second connecting block (24).

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