Cast valve body of butterfly valve

Abstract

The utility model discloses a butterfly valve casting valve body which comprises a valve body unit, and a sealing unit is arranged on the valve body unit and used for enhancing the sealing performance of the valve body unit. The sealing unit comprises a mounting seat, a sealing element and a sealing element, wherein a clamping block is arranged on the outer side of the mounting seat; the tightening ring is arranged on the inner side of the mounting seat; and the sealing washer is arranged on the inner side of the tightening ring, and the sealing washer is always propped against the valve rod through the tightening ring, so that the sealing washer can still be tightly attached to the valve rod after being abraded, and the sealing performance of the sealing washer is ensured. According to the casting valve body of the butterfly valve, the sealing unit is arranged at the top, so that the top of the valve body is tightly attached to the valve rod, after the inner diameter of the sealing gasket is abraded and becomes large, the tightening ring always extrudes the sealing gasket to be tightly attached to the valve rod, and the problem that leakage occurs due to abrasion of the sealing ring caused by rotating friction between the valve rod and the sealing ring is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to butterfly valve body technical field, concretely is a butterfly valve cast valve body. BACKGROUND

[0002] The butterfly valve is also called flap valve or butterfly valve, and is a simple structure regulating valve, in the cylindrical channel of the butterfly valve body, the disc-shaped butterfly plate rotates around the axis, when the butterfly plate rotates to 90 DEG, the valve is in the fully open state, when the butterfly plate is perpendicular to the pipeline center line, the valve is in the closed position. By changing the angle of the butterfly plate, the flow of medium can be adjusted.

[0003] The valve body of the butterfly valve is an important part of the butterfly valve, and the top thereof is usually connected with the valve cover, the connection part of the valve cover of most existing butterfly valves usually needs to be provided with a sealing ring, the sealing ring is tightly abutted with the valve rod to ensure the sealing property of the connection part, but the valve rod controls the reciprocating rotation of the disc, so that the valve rod and the sealing ring rotate and rub, which easily causes the abrasion of the sealing ring and further easily causes leakage, thereby affecting the use effect of the butterfly valve. UTILITY MODEL CONTENTS

[0004] The utility model discloses a butterfly valve cast valve body, solve the connection part of the valve cover of most butterfly valve body sealing ring and valve rod rotation and rub and cause sealing ring abrasion and further easily cause leakage problem.

[0005] A butterfly valve cast valve body, including valve body unit, be provided with sealing unit on valve body unit, it is used for strengthening the sealing property of valve body unit;

[0006] The sealing unit includes:

[0007] The mounting seat is provided with a clamping block on the outer side thereof;

[0008] The tightening ring is arranged on the inner side of the mounting seat;

[0009] The sealing gasket is arranged on the inner side of the tightening ring, and the sealing gasket is always abutted with the valve rod through the tightening ring, so that the sealing gasket can be tightly attached with the valve rod after abrasion, to ensure the sealing property thereof.

[0010] Preferably, the valve body unit includes:

[0011] The valve body body;

[0012] The sleeve rod is arranged on the top of the valve body body;

[0013] The flange plate is arranged on the top of the sleeve rod, and is used for connecting the valve body unit with the valve cover.

[0014] Preferably, the flange plate is provided with a clamping groove, and the clamping block is inserted into the clamping groove.

[0015] Preferably, the sealing unit further comprises a fastening screw, the fastening screw is screwed through the clamping block and the flange plate, by unscrewing the fastening screw, the sealing unit can be detached from the flange plate, so as to facilitate replacement and ensure the sealing performance of the top of the butterfly valve body.

[0016] Preferably, the outer side of the tightening ring is connected with the mounting seat, and the inner side of the tightening ring abuts against the sealing gasket, and the tightening ring is used to drive the sealing gasket to abut against the valve rod.

[0017] Preferably, the sealing gasket movably abuts against the valve rod.

[0018] Preferably, the sealing unit is movably mounted on the flange plate.

[0019] By adopting the above technical scheme, the top of the butterfly valve cast body is tightly combined with the valve rod, and the problem that the sealing gasket is worn due to rotating friction between the valve rod and the sealing gasket at the top of the butterfly valve cast body is avoided.

[0020] Compared with the prior art, the butterfly valve cast body has the following beneficial effects:

[0021] 1. The butterfly valve cast body is provided with a sealing unit, the mounting seat is mounted on the flange plate, the tightening ring is arranged on the inner side of the mounting seat, the sealing gasket is arranged on the inner side of the tightening ring and is sleeved on the valve rod, the tightening ring is contracted and presses the sealing gasket and the valve rod to be tightly combined, the inner diameter of the sealing gasket is always tightly combined with the valve rod after being worn and enlarged, and the problem that the sealing gasket is worn due to rotating friction between the valve rod and the sealing gasket is avoided.

[0022] 2. The butterfly valve cast body is provided with a mounting seat which can be mounted and detached, so that when the tightening ring and the sealing gasket need to be replaced, the sealing unit can be detached from the flange plate by unscrewing the fastening screw, so as to facilitate replacement and ensure the sealing performance of the top of the butterfly valve body. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a structural schematic view of the utility model;

[0024] Figure 2 It is a structural schematic view of the valve body unit of the utility model;

[0025] Figure 3 It is a structural schematic view of the sealing unit of the utility model;

[0026] Figure 4 It is a structural schematic view of the flange plate of the utility model.

[0027] In the figure: 1, valve body unit; 11, valve body body; 12, sleeve rod; 13, flange plate; 131, clamping groove; 2, sealing unit; 21, mounting seat; 211, clamping block; 22, tightening ring; 23, sealing washer; 24, fastening screw; 3, valve stem. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0029] Please refer to Figures 1-4 The present application provides a technical solution:

[0030] Embodiment one

[0031] A butterfly valve cast valve body, comprising a valve body unit 1, the valve body unit 1 is provided with a sealing unit 2, which is used to strengthen the sealing property of the valve body unit 1;

[0032] The sealing unit 2 comprises:

[0033] The mounting seat 21 is provided with a clamping block 211 on the outer side of the mounting seat 21;

[0034] The tightening ring 22 is arranged on the inner side of the mounting seat 21;

[0035] The sealing washer 23 is arranged on the inner side of the tightening ring 22, and the sealing washer 23 is always in abutment with the valve stem 3 through the tightening ring 22, so that the sealing washer 23 can still be closely attached to the valve stem 3 after wear, so as to ensure its sealing property.

[0036] Further, the valve body unit 1 comprises:

[0037] The valve body body 11;

[0038] The sleeve rod 12 is arranged on the top of the valve body body 11;

[0039] The flange plate 13 is arranged on the top of the sleeve rod 12, which is used to connect the valve body unit 1 with the valve cover.

[0040] Further, the mounting seat 21 is mounted on the flange plate 13, the tightening ring 22 is arranged inside the mounting seat 21, and the sealing washer 23 is arranged inside the tightening ring 22 and sleeved on the valve rod 3, so that the tightening ring 22 is contracted to tightly press the sealing washer 23 against the valve rod 3, and even if the inner diameter of the sealing washer 23 is enlarged due to wear, the tightening ring 22 can always tightly press the sealing washer 23 against the valve rod 3, thereby avoiding the problem that the sealing washer 23 is worn due to the rotating friction between the valve rod 3 and the sealing washer 23.

[0041] Embodiment two

[0042] The butterfly valve cast valve body comprises a valve body unit 1, and a sealing unit 2 is arranged on the valve body unit 1 and used for enhancing the sealing performance of the valve body unit 1.

[0043] The sealing unit 2 comprises:

[0044] A mounting seat 21 is arranged on the outer side of the sealing unit 2.

[0045] A tightening ring 22 is arranged on the inner side of the mounting seat 21.

[0046] A sealing washer 23 is arranged on the inner side of the tightening ring 22, and the sealing washer 23 is always in abutment with the valve rod 3 through the tightening ring 22, so that the sealing washer 23 can still tightly abut against the valve rod 3 after being worn, thereby ensuring the sealing performance.

[0047] Further, a clamping groove 131 is arranged on the flange plate 13, and the clamping groove 131 is inserted with the clamping block 211.

[0048] Further, the sealing unit 2 further comprises a fastening screw 24, and the fastening screw 24 is threadedly connected with the flange plate 13 through the clamping block 211.

[0049] Further, the outer side of the tightening ring 22 is connected with the mounting seat 21, and the inner side of the tightening ring 22 is in abutment with the sealing washer 23, and the tightening ring 22 is used to drive the sealing washer 23 to abut against the valve rod 3.

[0050] Further, the sealing washer 23 is in abutment with the valve rod 3, and the sealing washer 23 is always tightly pressed against the valve rod 3 under the contraction of the tightening ring 22, thereby ensuring the sealing performance of the top of the butterfly valve cast valve body.

[0051] Further, the sealing unit 2 is movably mounted on the flange plate 13, and the mounting seat 21 can be mounted and dismounted, so that when the tightening ring 22 and the sealing washer 23 need to be replaced, the sealing unit 2 can be dismounted from the flange plate 13 by loosening the fastening screw 24, thereby facilitating replacement and ensuring the sealing performance of the top of the butterfly valve body.

[0052] Working principle: first, the valve stem 3 is inserted into the sleeve rod 12, so that the bottom end of the valve stem 3 is connected with the disc, then the clamping block 211 on the mounting seat 21 is inserted into the clamping groove 131 on the flange plate 13, the fastening screw 24 is tightened, so that the mounting seat 21 is installed on the flange plate 13, the tightening ring 22 is arranged on the inner side of the mounting seat 21, then the sealing washer 23 is sleeved on the valve stem 3, and the sealing washer 23 is installed on the inner side of the tightening ring 22, at this time, the tightening ring 22 is expanded, so that the tightening ring 22 generates an inward shrinking force, the tightening ring 22 shrinks and extrudes the sealing washer 23 and the valve stem 3 to be closely attached, so that the inner diameter of the sealing washer 23 is always extruded and closely attached to the valve stem 3 after being worn and enlarged.

[0053] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above. It should be understood by those skilled in the art that the utility model is not limited by the above-mentioned embodiments, and the above-mentioned embodiments and the description in the specification are only to illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model can also have various changes and improvements, and these changes and improvements all fall within the scope of the utility model claimed. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A butterfly valve casting body, comprising a valve body unit (1), characterized in that: The valve body unit (1) is provided with a sealing unit (2), which is used to enhance the sealing performance of the valve body unit (1); The sealing unit (2) includes: Mounting base (21), wherein a locking block (211) is provided on the outer side of the mounting base (21); A tightening ring (22) is disposed on the inner side of the mounting base (21); A sealing gasket (23) is provided inside the tightening ring (22). The sealing gasket (23) is kept in contact with the valve stem (3) by the tightening ring (22), so that the sealing gasket (23) can still fit tightly with the valve stem (3) after wear, so as to ensure its sealing performance.

2. The butterfly valve casting body as described in claim 1, characterized in that: The valve body unit (1) includes: Valve body (11); Sleeve rod (12), the sleeve rod (12) is disposed on the top of the valve body (11); A flange (13) is disposed on top of a sleeve (12) for connecting the valve body unit (1) to the valve cover.

3. The butterfly valve casting body as described in claim 2, characterized in that: The flange (13) is provided with a slot (131), and a locking block (211) is inserted into the slot (131).

4. The butterfly valve casting body as described in claim 2, characterized in that: The sealing unit (2) also includes a fastening screw (24) which passes through the locking block (211) and is threadedly connected to the flange (13).

5. The butterfly valve casting body as described in claim 1, characterized in that: The outer side of the tightening ring (22) is connected to the mounting base (21), and the inner side of the tightening ring (22) abuts against the sealing gasket (23). The tightening ring (22) is used to drive the sealing gasket (23) to abut against the valve stem (3).

6. The butterfly valve casting body as described in claim 1, characterized in that: The sealing gasket (23) is in movable contact with the valve stem (3).

7. The butterfly valve casting body as described in claim 2, characterized in that: The sealing unit (2) is movably mounted on the flange (13).

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