Reducing check valve

Abstract

The utility model discloses a reducing check valve, belongs to the technical field of check valves, and solves the problem that the space in the check valve is relatively fixed and cannot be adjusted according to the requirements of operators. Comprising a valve body, a multi-step connecting pipe communicated with the valve body, a through pipe and a connecting disc fixedly connected to the outer ring of one end of the through pipe, a multi-step channel with the inner diameter gradually reduced from the end facing the valve body is formed in the multi-step connecting pipe, and a multi-step caulking groove communicated with the multi-step channel is formed in the peripheral wall of the multi-step connecting pipe; a multi-step embedded block is detachably connected into the multi-step embedded groove, and the through pipe penetrates through the multi-step connecting pipe. According to the variable-diameter check valve, an operator unscrews the inner hexagon bolts and adjusts the position of the connecting disc to change the volume of the buffer space, after the multi-step embedded blocks are embedded again, the sealing bolts are tightened, the embedded blocks are fixed, the threaded sealing holes are sealed, and therefore it is guaranteed that the variable-diameter check valve can be adjusted according to different buffer space requirements.

Description

Technical Field

[0001] The utility model relates to the technical field of check valves, in particular to a variable diameter check valve. Background Art

[0002] A check valve, also known as a non-return valve or non-return valve, is a valve used to control the one-way flow of fluid. A check valve can prevent the fluid from flowing back in the pipeline and play a role in preventing backflow. It is often used in hydraulic systems, air systems, petrochemical systems and other fields. Its working principle is to use the design of the valve disc or valve seat to allow the fluid to pass through the valve smoothly when it flows in one direction, and the valve automatically closes when it flows in the reverse direction to prevent the fluid from flowing back. There are many types of check valves, including one-way check valves, ball check valves, swing check valves, etc., which have the characteristics of simple structure, easy use, and low maintenance cost. They are widely used in pipeline systems in the industrial field.

[0003] Since check valves are used in different scenarios, one of which is when they need to connect large-flow pipelines with small-flow pipelines, the space inside the check valve can buffer the flow changes of the large and small-flow pipelines. However, the space inside the check valve is relatively fixed and cannot be adjusted according to the needs of the operator.

[0004] Therefore, a variable diameter check valve is proposed to solve or alleviate the above problems. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a variable diameter check valve.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A variable diameter check valve comprises a valve body, a multi-step connecting pipe connected thereto, a through pipe, and a connecting disk fixedly connected to the outer ring of one end of the through pipe, wherein the multi-step connecting pipe contains a multi-step channel whose inner diameter gradually decreases from one end of the valve body, the outer peripheral wall of the multi-step connecting pipe is provided with a multi-step embedding groove connected to the multi-step channel, a multi-step embedding block is detachably connected to the multi-step embedding groove, the through pipe runs through the multi-step connecting pipe, and an adaptor connecting ring matching the spacing between the outer ring of the connecting disk and the multi-step embedding block is detachably connected therebetween.

[0008] Preferably, the outer circumferential wall of the multi-step insert is provided with a threaded sealing hole extending radially therethrough, the outer circumferential wall of the adapter connection ring is provided with a threaded hole coaxially arranged with any one of the threaded sealing holes, the outer circumferential wall of the connection plate is provided with a threaded groove coaxially arranged with the threaded hole, and the threaded sealing holes are threadedly connected with sealing bolts, wherein one of the sealing bolts is threadedly connected with the threaded hole and the threaded groove.

[0009] Preferably, a recessed groove coaxially arranged with the threaded sealing hole is provided on the outer peripheral wall of the multi-step insert, and the screw head of the sealing bolt can be immersed in the recessed groove.

[0010] Preferably, the inner ring of the adapting connection ring is fitted with the outer ring of the connection disk, and the outer ring of the adapting connection ring is fitted with the inner circumferential wall of the multi-step channel.

[0011] Preferably, the multi-stage channel includes a primary channel, a secondary channel, a tertiary channel, a quaternary channel, and a quintuple channel with successively smaller tube diameters, the tube diameter of the quintuple channel is the same as the outer diameter of the through pipe, the inner diameter of the quaternary channel is the same as the outer diameter of the connecting plate, and the adapting connecting ring has three outer diameters to adapt to the primary channel, the secondary channel, and the tertiary channel.

[0012] Preferably, the multi-stage embedded groove includes a primary embedded groove connected to the primary channel, a secondary embedded groove connected to the secondary channel, a tertiary embedded groove connected to the tertiary channel, a fourth embedded groove connected to the fourth channel, and a fifth embedded groove connected to the fifth channel; the multi-stage embedded blocks include a primary embedded block embedded in the primary embedded groove, a secondary embedded block embedded in the secondary embedded groove, a tertiary embedded block embedded in the tertiary embedded groove, a fourth embedded block embedded in the fourth embedded groove, and a fifth embedded block embedded in the fifth embedded groove.

[0013] Preferably, it also includes a connecting flange, which is fixedly connected to one side of the valve body, and the multi-step connecting pipe is fixedly connected to the connecting flange by bolts.

[0014] The utility model has the following beneficial effects:

[0015] When the operator needs a buffer space of different volumes, the utility model only needs to loosen the sealing bolt which is a hexagon socket bolt with a hexagonal wrench to pull the multi-step insert out of the multi-step insert groove, and then adjust the position of the connecting plate to adjust the volume of the buffer space between the connecting plate and the connecting flange, and then reinsert the multi-step insert and screw back the sealing bolt, so that the sealing bolt can not only fix the multi-step insert, but also close the threaded sealing hole, thereby ensuring that the variable diameter check valve can be adjusted according to the operator's needs for buffer spaces of different volumes. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is an exploded view of the utility model;

[0018] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0019] Figure 4 It is a partial cross-sectional view of the utility model;

[0020] Figure 5 for Figure 4 Enlarged view of point B in the middle.

[0021] 1. Valve body; 2. Connecting flange; 3. Multi-step connecting pipe; 4. Multi-step embedded groove; 401. Primary embedded groove; 402. Secondary embedded groove; 403. Third-level embedded groove; 404. Fourth-level embedded groove; 405. Fifth-level embedded groove; 5. Multi-step embedded block; 501. Primary embedded block; 502. Secondary embedded block; 503. Third-level embedded block; 504. Fourth-level embedded block; 505. Fifth-level embedded block; 506. Countersunk groove; 507. Sealing bolt; 6. Through pipe; 7. Connecting plate; 8. Adapter ring; 801. Threaded hole. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0023] A variable diameter check valve, such as Figure 1 As shown, it includes a valve body 1, a connecting flange 2 fixedly connected to one side of the valve body 1, a multi-step connecting pipe 3 connected thereto, a through pipe 6, and a connecting plate 7 fixedly connected to the outer ring of one end of the through pipe 6. The multi-step connecting pipe 3 is fixedly connected to the connecting flange 2 by bolts. There is a multi-step channel with an inner diameter that gradually decreases from one end of the valve body 1 in the multi-step connecting pipe 3. A multi-step embedding groove 4 connected to the multi-step channel is provided on the outer peripheral wall of the multi-step connecting pipe 3. A multi-step embedding block 5 is detachably connected to the multi-step embedding groove 4. The through pipe 6 runs through the multi-step connecting pipe 3, and an adapting connecting ring 8 matching the spacing between the outer ring of the connecting plate 7 and the multi-step embedding block 5 is detachably connected therebetween. The inner ring of the adapting connecting ring 8 is fitted with the outer ring of the connecting plate 7, and the outer ring of the adapting connecting ring 8 is fitted with the inner peripheral wall of the multi-step channel.

[0024] like Figure 2-5 As shown, the multi-step insert 5 has a threaded sealing hole radially extending therethrough on its outer circumferential wall, a countersunk groove 506 coaxially arranged with the threaded sealing hole is provided on the outer circumferential wall of the multi-step insert 5, a threaded hole 801 coaxially arranged with any one of the threaded sealing holes is provided on the outer circumferential wall of the adapter connecting ring 8, a threaded groove coaxially arranged with the threaded hole 801 is provided on the outer circumferential wall of the connecting plate 7, and sealing bolts 507 are threadedly connected in the threaded sealing holes, one of the sealing bolts 507 is threadedly connected with the threaded hole 801 and the threaded groove, and the screw head of the sealing bolt 507 can be immersed in the countersunk groove 506.

[0025] The multi-stage channel includes a primary channel, a secondary channel, a tertiary channel, a quaternary channel, and a quintuple channel, the diameters of which decrease in sequence. The diameter of the quintuple channel is the same as the outer diameter of the through pipe 6, the inner diameter of the quaternary channel is the same as the outer diameter of the connecting plate 7, and the adapting connecting ring 8 has three outer diameters to adapt to the primary channel, the secondary channel, and the tertiary channel. The multi-stage embedded groove 4 includes a primary embedded groove 401 connected to the primary channel, a secondary embedded groove 402 connected to the secondary channel, a tertiary embedded groove 403 connected to the tertiary channel, a fourth embedded groove 404 connected to the fourth channel, and a fifth embedded groove 405 connected to the fifth channel. The multi-stage embedded block 5 includes a primary embedded block 501 embedded in the primary embedded groove 401, a secondary embedded block 502 embedded in the secondary embedded groove 402, a tertiary embedded block 503 embedded in the tertiary embedded groove 403, a fourth embedded block 504 embedded in the fourth embedded groove 404, and a fifth embedded block 505 embedded in the fifth embedded groove 405.

[0026] When the operator needs to adjust the volume of the buffer space according to the needs, the variable diameter check valve has 4 states that can be adjusted. The first state is that when the connecting plate 7 is located in the primary channel, the size of the buffer space only includes the space size at the connection point between the multi-stage connecting pipe 3 and the connecting flange 2. At this time, the adapter connecting ring 8 adopts a specification in which the outer diameter fits the inner wall of the primary insert 501 and the inner wall of the primary channel. The second state is that when the connecting plate 7 is located in the secondary channel, the size of the buffer space will add the space size of the primary channel. At this time, the adapter connecting ring 8 adopts a specification in which the outer diameter fits the inner wall of the secondary insert 502 and the inner wall of the secondary channel The third type is when the connecting disk 7 is located in the tertiary channel, the size of the buffer space will add the space sizes of the primary channel and the secondary channel. At this time, the adapter connecting ring 8 adopts a specification whose outer diameter fits the inner wall of the tertiary block 503 and the inner wall of the tertiary channel. The fourth type is when the connecting disk 7 is located in the quadruple channel, the size of the buffer space will add the space sizes of the primary channel, the secondary channel, and the tertiary channel. At this time, the adapter connecting ring 8 is no longer used, and the outer ring of the connecting disk 7 is fitted with the inner circumferential wall of the quadruple channel. In the above method, the through pipe 6 leaves the fifth channel, and the fifth channel is fitted with the outer circumferential wall of the through pipe 6.

[0027] The actual adjustment method is to use a hexagonal wrench to twist the sealing bolt 507, which is a hexagonal socket bolt. When it is no longer connected to the multi-step insert 5, the adapter connection ring 8 and the connection plate 7, the multi-step insert 5 can be taken out and then the above-mentioned adjustment can be performed. It should be noted that the outer ring of the screw rod of the sealing bolt 507 is fixedly connected with a sealing rubber layer to ensure that even if the screw head does not touch the bottom surface of the sink groove 506, the screw rod can still be sealed with the threaded sealing hole, and leakage is not likely to occur.

[0028] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A variable diameter check valve, characterized in that: The invention comprises a valve body (1), a multi-step connecting pipe (3) connected thereto, a through pipe (6), and a connecting plate (7) fixedly connected to the outer ring of one end of the through pipe (6); the multi-step connecting pipe (3) contains a multi-step channel whose inner diameter gradually decreases from one end of the valve body (1); the outer peripheral wall of the multi-step connecting pipe (3) is provided with a multi-step embedding groove (4) connected to the multi-step channel; a multi-step embedding block (5) is detachably connected to the multi-step embedding groove (4); the through pipe (6) passes through the multi-step connecting pipe (3); and an adapting connecting ring (8) that matches the spacing between the outer ring of the connecting plate (7) and the multi-step embedding block (5) is detachably connected therebetween.

2. A variable diameter check valve according to claim 1, characterized in that: The outer peripheral wall of the multi-stage insert (5) is provided with a threaded sealing hole extending radially therethrough; the outer peripheral wall of the adapter connection ring (8) is provided with a threaded hole (801) which can be coaxially arranged with any one of the threaded sealing holes; the outer peripheral wall of the connection plate (7) is provided with a threaded groove which can be coaxially arranged with the threaded hole (801); the threaded sealing holes are threadedly connected with sealing bolts (507), wherein one of the sealing bolts (507) is threadedly connected with the threaded hole (801) and the threaded groove.

3. A variable diameter check valve according to claim 2, characterized in that: A recessed groove (506) coaxially arranged with the threaded sealing hole is provided on the outer peripheral wall of the multi-step insert (5), and the screw head of the sealing bolt (507) can be immersed in the recessed groove (506).

4. A variable diameter check valve according to claim 1, characterized in that: The inner ring of the adapting connection ring (8) is arranged to fit with the outer ring of the connection disk (7), and the outer ring of the adapting connection ring (8) is arranged to fit with the inner peripheral wall of the multi-step channel.

5. A variable diameter check valve according to claim 4, characterized in that: The multi-stage channel comprises a primary channel, a secondary channel, a tertiary channel, a quaternary channel, and a quintuple channel, the diameters of which decrease successively. The diameter of the quintuple channel is the same as the outer diameter of the through pipe (6), the inner diameter of the quaternary channel is the same as the outer diameter of the connecting plate (7), and the adapting connecting ring (8) has three outer diameters to adapt to the primary channel, the secondary channel, and the tertiary channel.

6. A variable diameter check valve according to claim 5, characterized in that: The multi-stage embedded groove (4) comprises a primary embedded groove (401) communicating with a primary channel, a secondary embedded groove (402) communicating with a secondary channel, a tertiary embedded groove (403) communicating with a tertiary channel, a quaternary embedded groove (404) communicating with a quaternary channel, and a quintuple embedded groove (405) communicating with a quintuple channel; the multi-stage embedded block (5) comprises a primary embedded block (501) embedded in the primary embedded groove (401), a secondary embedded block (502) embedded in the secondary embedded groove (402), a tertiary embedded block (503) embedded in the tertiary embedded groove (403), a quaternary embedded block (504) embedded in the quaternary embedded groove (404), and a quintuple embedded block (505) embedded in the quintuple embedded groove (405).

7. The variable diameter check valve according to claim 1, characterized in that: It also comprises a connecting flange (2), wherein the connecting flange (2) is fixedly connected to one side of the valve body (1), and the multi-step connecting pipe (3) is fixedly connected to the connecting flange (2) by means of bolts.

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