Butt-clamping butterfly check valve with protective sleeve

Abstract

The utility model relates to the technical field of protective sleeves, and discloses a wafer butterfly check valve with a protective sleeve, which comprises a check valve body and two valve clacks, the two valve clacks are mounted in the check valve body in a hinged manner, and an arc step is arranged on the outer surface of one side of each valve clack. According to the check valve, the rubber sealing gasket is arranged on the contact sealing surface of the valve clack and the check valve body, so that the abrasion of the contact surface of the valve clack and the check valve body caused by friction between the valve clack and the inner wall of the check valve body when the valve clack rotates is avoided, and the service life of the check valve body is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of protective sleeves, in particular to a wafer-type butterfly check valve with a protective sleeve. Background Art

[0002] Wafer butterfly check valve refers to a valve that automatically opens and closes the valve disc by the flow of the medium itself to prevent the medium from flowing back. It is also called a non-return valve, a one-way valve, a reverse flow valve, and a back pressure valve. The check valve is an automatic valve, and its main function is to prevent the medium from flowing back, to prevent the pump and the drive motor from reversing, and to release the container medium.

[0003] When the existing wafer-type butterfly check valve is in use, the valve disc often opens and closes, so the valve disc will rub against the inner wall of the valve seat. Excessive friction will cause the valve disc and the inner wall of the valve seat to wear, resulting in a gap between the two, thereby deteriorating the sealing performance of the wafer-type butterfly check valve body and reducing the service life of the wafer-type butterfly check valve. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a wafer-type butterfly check valve with a protective sleeve.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A wafer-type butterfly check valve with a protective sleeve comprises a check valve body and two valve flaps, the two valve flaps are hingedly mounted inside the check valve body, an arc step is provided on the outer surface of one side of the valve flap, a first T-shaped slide groove is provided on the bottom wall of the arc step, a second T-shaped slide groove is provided on the side wall of the arc step, a plurality of sealing grooves are provided on the bottom wall of the arc step, a first T-shaped slide rail is slidably mounted on the inner wall of the first T-shaped slide groove, a second T-shaped slide rail is slidably mounted on the inner wall of the second T-shaped slide groove, an arc base is fixedly mounted on the outer surfaces of the first T-shaped slide rail and the second T-shaped slide rail, and a rubber sealing pad is fixedly mounted on the upper surface of the arc base.

[0007] As a further solution of the utility model, the rubber sealing pad abuts against the inner wall of the check valve body, and a plurality of rubber sealing rings are fixedly mounted on the lower surface of the arc base.

[0008] As a further solution of the utility model, the rubber sealing ring is arranged inside the sealing groove and abuts against the inner wall thereof.

[0009] As a further solution of the utility model, two positioning columns are fixedly installed on the two end surfaces of the valve disc, and the outer surfaces of the two positioning columns are slidably installed with limiting plates. The outer surfaces of the limiting plates are penetrated with positioning holes, and the positioning columns are slidably installed with the inner walls of the positioning holes.

[0010] As a further solution of the utility model, two hexagon socket bolts are inserted through the outer surface of the limit plate near the two ends, and bolt holes matching the hexagon socket bolts are formed on the two end surfaces of the valve disc.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] The device installs a rubber sealing pad on the contact sealing surface between the valve disc and the check valve body to avoid friction between the valve disc and the inner wall of the check valve body when the valve disc rotates, thereby preventing the contact surface of the two from being worn, thereby extending the service life of the check valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall structure of a wafer-type butterfly check valve with a protective sleeve proposed by the utility model;

[0014] Figure 2 This is a rear view structural schematic diagram of a wafer-type butterfly check valve with a protective sleeve proposed by the utility model;

[0015] Figure 3 A schematic diagram of a valve disc of a wafer-type butterfly check valve with a protective sleeve proposed by the utility model;

[0016] Figure 4 It is a schematic diagram of a positioning column of a wafer-type butterfly check valve with a protective sleeve proposed by the utility model;

[0017] Figure 5 A schematic diagram of a rubber sealing ring of a wafer-type butterfly check valve with a protective sleeve proposed by the utility model;

[0018] Figure 6 Based Figure 3 A partial enlarged schematic diagram in the middle;

[0019] Figure 7 Based Figure 4 A partial enlarged schematic diagram of point B in the middle.

[0020] In the figure: 1. Check valve body; 2. Valve disc; 3. Rubber sealing gasket; 4. Arc base; 5. Limit plate; 6. Hexagon socket bolt; 7. Positioning column; 8. Sealing groove; 9. First T-type slide groove; 10. Second T-type slide groove; 11. Rubber sealing ring; 12. First T-type slide rail; 13. Second T-type slide rail. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0022] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the 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 operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" 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 an indirect connection 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.

[0024] Reference Figure 1-Figure 7 A wafer-type butterfly check valve with a protective sleeve comprises a check valve body 1 and two valve flaps 2, the two valve flaps 2 are hingedly mounted inside the check valve body 1, an outer surface of one side of the valve flap 2 is provided with an arc step, a bottom wall of the arc step is provided with a first T-shaped slide groove 9, a side wall of the arc step is provided with a second T-shaped slide groove 10, a bottom wall of the arc step is provided with a plurality of sealing grooves 8, a first T-shaped guide rail 12 is slidably mounted on the inner wall of the first T-shaped guide groove 9, a second T-shaped guide rail 13 is slidably mounted on the inner wall of the second T-shaped guide groove 10, an arc base 4 is fixedly mounted on the outer surfaces of the first T-shaped guide rail 12 and the second T-shaped guide rail 13, a rubber sealing pad 3 is fixedly mounted on the upper surface of the arc base 4, and the rubber sealing pad 3 is abutted against the inner wall of the check valve body 1.

[0025] When in use, the user first aligns the first T-shaped slide rail 12 and the second T-shaped slide rail 13 on the arc base 4 with the first T-shaped slide groove 9 and the second T-shaped slide groove 10 respectively, and at the same time, aligns the rubber sealing ring 11 with the sealing groove 8, and manually pushes the arc base 4 to make the arc base 4 drive the rubber sealing pad 3 to slide into the specified position. The device installs the rubber sealing pad 3 on the contact and sealing surface of the valve disc 2 and the check valve body 1, thereby avoiding friction between the valve disc 2 and the inner wall of the check valve body 1 when rotating, which causes wear of the contact surface between the two, thereby extending the service life of the check valve body 1.

[0026] In this embodiment, a plurality of rubber sealing rings 11 are fixedly mounted on the lower surface of the arc base 4 . The rubber sealing rings 11 are arranged inside the sealing groove 8 and abut against the inner wall thereof.

[0027] The arc base 4 is sealed to the outer surface of the arc step of the valve disc 2 through the rubber sealing ring 11 and the sealing groove 8 .

[0028] In this embodiment, two positioning columns 7 are fixedly installed on the two end surfaces of the valve disc 2, and the outer surfaces of the two positioning columns 7 are slidably installed with limiting plates 5. The outer surface of the limiting plate 5 is penetrated with a positioning hole, and the positioning columns 7 are slidably installed with the inner wall of the positioning hole. The outer surface of the limiting plate 5 near the two ends is penetrated with two hexagon socket bolts 6, and the two end surfaces of the valve disc 2 are provided with bolt holes matching the hexagon socket bolts 6.

[0029] When the arc base 4 slides into the specified position, the limit plate 5 is fixedly installed on both ends of the valve disc 2 by the hexagon socket bolts 6, so as to fix the position of the arc base 4, and the installation position of the limit plate 5 is conveniently determined by the positioning column 7 and the positioning hole.

[0030] It should be noted that when the utility model is in use, the user first aligns the first T-shaped slide rail 12 and the second T-shaped slide rail 13 on the arc base 4 with the first T-shaped slide groove 9 and the second T-shaped slide groove 10 respectively, and at the same time, aligns the rubber sealing ring 11 with the sealing groove 8, and manually pushes the arc base 4 to make the arc base 4 drive the rubber sealing pad 3 to slide into the specified position, and the arc base 4 is sealed with the outer surface of the arc step of the valve disc 2 through the rubber sealing ring 11 and the sealing groove 8. After the arc base 4 slides into the specified position, the limit plate 5 is fixedly installed on the two ends of the valve disc 2 by the hexagon socket bolts 6, so as to fix the position of the arc base 4. The device installs the rubber sealing pad 3 on the contact sealing surface of the valve disc 2 and the check valve body 1 to avoid friction between the valve disc 2 and the inner wall of the check valve body 1 when rotating, which causes wear of the contact surface between the two, thereby extending the service life of the check valve body 1.

[0031] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A wafer-type butterfly check valve with a protective sleeve, comprising a check valve body (1) and two valve flaps (2), wherein the two valve flaps (2) are hingedly mounted inside the check valve body (1), characterized in that: An arc step is provided on the outer surface of one side of the valve disc (2); a first T-shaped slide groove (9) is provided on the bottom wall of the arc step; a second T-shaped slide groove (10) is provided on the side wall of the arc step; a plurality of sealing grooves (8) are provided on the bottom wall of the arc step; a first T-shaped slide rail (12) is slidably mounted on the inner wall of the first T-shaped slide groove (9); a second T-shaped slide rail (13) is slidably mounted on the inner wall of the second T-shaped slide groove (10); an arc base (4) is fixedly mounted on the outer surfaces of the first T-shaped slide rail (12) and the second T-shaped slide rail (13); a rubber sealing pad (3) is fixedly mounted on the upper surface of the arc base (4).

2. A wafer-type butterfly check valve with a protective sleeve according to claim 1, characterized in that: The rubber sealing pad (3) abuts against the inner wall of the check valve body (1), and a plurality of rubber sealing rings (11) are fixedly mounted on the lower surface of the arc base (4).

3. A wafer-type butterfly check valve with a protective sleeve according to claim 2, characterized in that: The rubber sealing ring (11) is arranged inside the sealing groove (8) and abuts against the inner wall thereof.

4. The wafer-type butterfly check valve with a protective sleeve according to claim 1, characterized in that: Two positioning columns (7) are fixedly mounted on both end surfaces of the valve flap (2); a limiting plate (5) is slidably mounted on the outer surfaces of the two positioning columns (7); a positioning hole is penetrated through the outer surface of the limiting plate (5); and the positioning columns (7) are slidably mounted on the inner wall of the positioning hole.

5. The wafer-type butterfly check valve with a protective sleeve according to claim 4, characterized in that: Two hexagon socket bolts (6) are inserted through the outer surface of the limiting plate (5) near the two ends, and bolt holes matching the hexagon socket bolts (6) are formed on the two end surfaces of the valve flap (2).

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