Fixing device for valve seat of hard sealing butterfly valve

Abstract

The utility model discloses a hard sealing butterfly valve seat fixing device which comprises a valve seat, a connecting ring and an auxiliary ring, the connecting ring and the auxiliary ring are arranged on the two opposite sides of the valve seat, the connecting mode of the connecting ring and the connecting mode of the auxiliary ring are consistent, a fastening hole is formed in the valve seat in a penetrating mode, and auxiliary holes are formed in the connecting ring and the auxiliary ring in a penetrating mode. The number and specification of the fastening holes are consistent with those of the auxiliary holes in the two sides, the inner walls of the auxiliary holes are in threaded connection with fastening bolts, the fastening bolts penetrate through the auxiliary holes, and the fastening bolts are in threaded connection with the inner walls of the fastening holes at the same time; according to the utility model, the outer side connecting part is simultaneously connected with the connecting ring and the auxiliary ring, and the two sides of the valve seat are subjected to multi-stage connection, so that the fastening strength during use is ensured, the device has two-way multi-stage fixation, the fastening bolts on the two sides simultaneously move towards the middle part of the device, and the fastening bolts are ensured to be conveniently and stably fixed again; and the firmness of the device during installation and connection is further ensured.

Description

Technical Field

[0001] This utility model relates to the field of butterfly valve technology, and in particular to a valve seat fixing device for hard-seal butterfly valves. Background Technology

[0002] A butterfly valve, also known as a flap valve, is a simple regulating valve that can be used for on / off control of low-pressure pipeline media. A butterfly valve is a type of valve whose closing element is a disc that rotates around the valve shaft to achieve opening and closing.

[0003] The installation of a butterfly valve involves connecting and fixing its two valve seats to the pipeline, thereby achieving a control effect from a certain position in the middle of the pipeline. Currently, butterfly valves are basically connected by a single flange and bolts during installation. After tightening the bolts, no other fixing method is added, which makes it easy for the single-layer flange connection to have poor sealing performance and unstable tightening, which can easily lead to loosening and leakage, affecting the stability and tightness of the valve during installation and use.

[0004] Therefore, we provide a hard-seal butterfly valve seat fixing device. Utility Model Content

[0005] The purpose of this utility model is to address the aforementioned technical problems by providing a hard-seal butterfly valve seat fixing device that achieves multi-layer fastening and efficient sealing.

[0006] In view of this, the present invention provides a valve seat fixing device for a hard-seal butterfly valve, including a valve seat and a connecting ring and an auxiliary ring disposed on opposite sides of the valve seat. The connecting ring and the auxiliary ring are connected in the same way. The valve seat is provided with a through-hole for fastening. The connecting ring and the auxiliary ring are also provided with through-holes for auxiliary holes. The number and specifications of the fastening holes and the auxiliary holes on both sides are the same. A fastening bolt is threaded to the inner wall of the auxiliary hole. The fastening bolt passes through the auxiliary hole and is also threaded to the inner wall of the fastening hole.

[0007] Preferably, sealing gaskets are installed on the outer surfaces of the two opposite sides of the connecting ring, and sealing gaskets are installed on the two opposite sides of the auxiliary ring, with the sealing gaskets located between a plurality of fastening bolts.

[0008] Preferably, the valve seat has positioning grooves on both opposite sides, and the positioning grooves are positioned and inserted into the sealing gasket.

[0009] Preferably, the outer center of the valve seat has a hollow fastening space, and the fastening hole penetrates the hollow fastening space.

[0010] Preferably, a plurality of adjusting cylinders are rotatably installed in the hollow fastening space, and a fastening screw hole is provided through the middle of the adjusting cylinder. The number and specifications of the fastening screw hole, the fastening hole, and the auxiliary hole are all the same.

[0011] Preferably, a rotating connecting ring is sleeved on the outer side of the adjusting cylinder, and there are at least two rotating connecting rings, with a rotating support ring sleeved on the outer side of each of the two rotating connecting rings.

[0012] Preferably, the inner wall of the rotating support ring is provided with a limiting ring groove, the rotating connecting ring is rotatably installed inside the limiting ring groove, and the rotating support ring is fixedly installed inside the hollow fastening space.

[0013] Compared with the prior art, this utility model provides a valve seat fixing device for hard-seal butterfly valves, which has the following advantages:

[0014] This invention achieves multi-stage connection on both sides of the valve seat by simultaneously connecting the outer connecting component to the connecting ring and auxiliary ring, thereby ensuring its fastening strength during use and enabling the device to have bidirectional multi-stage fixation. Based on the positioning insertion of the sealing gaskets on both sides and the positioning grooves on both sides, when the connecting rings and auxiliary rings on both sides are fastened to the valve seat, the sealing gaskets at the connection point are compressed and deformed, thus ensuring the sealing effect of the connection surface while fastening the valve seat connection, guaranteeing its stability and reliability during use. Furthermore, based on the threaded connection of the adjusting cylinder to the fastening bolts on both sides through the fastening screw holes, the middle position of the fastening bolts on both sides is further fixed, and the end positions of the fastening bolts are further reinforced, ensuring the overall stability of the fastening bolt connection. At the same time, it also acts as a limiter for the fastening bolts from the middle, improving the overall limiting strength of the fastening bolts and increasing the strength of the valve seat during connection, installation, and use.

[0015] The parts of this device not covered herein are the same as or can be implemented using existing technologies. This utility model has a simple structure and is easy to operate. Attached Figure Description

[0016] Figure 1 This is a schematic side view of the overall structure of the hard-seal butterfly valve seat fixing device proposed in this utility model;

[0017] Figure 2 This is a three-dimensional structural diagram of the left half of the hard-seal butterfly valve seat fixing device proposed in this utility model.

[0018] Figure 3 This is a three-dimensional structural diagram of the connecting ring of the hard-seal butterfly valve seat fixing device proposed in this utility model;

[0019] Figure 4 This is a schematic diagram of the installation position of the adjusting cylinder of the hard-seal butterfly valve seat fixing device proposed in this utility model;

[0020] Figure 5 This is a three-dimensional structural diagram of the adjusting cylinder of the hard-seal butterfly valve seat fixing device proposed in this utility model.

[0021] In the diagram: 1. Valve seat; 101. Positioning groove; 103. Fastening hole; 2. Connecting ring; 201. Auxiliary ring; 202. Fastening bolt; 203. Sealing gasket; 204. Auxiliary hole; 3. Adjusting cylinder; 301. Fastening screw hole; 302. Rotating connecting ring; 303. Rotating support ring; 304. Limiting ring groove. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] Example 1: Hard-seal butterfly valve seat fixing device, such as Figures 1-5 As shown, the valve includes a valve seat 1, and a connecting ring 2 and an auxiliary ring 201 disposed on opposite sides of the valve seat 1. The connecting ring 2 and the auxiliary ring 201 are connected in the same way. The valve seat 1 has a through-hole 103. The connecting ring 2 and the auxiliary ring 201 both have through-holes 204. The number and specifications of the fastening holes 103 and the auxiliary holes 204 on both sides are the same. The inner wall of the auxiliary hole 204 is threaded with a fastening bolt 202. The fastening bolt 202 passes through the auxiliary hole 204 and is also threaded to the inner wall of the fastening hole 103.

[0025] First, based on the positioning guidance of the auxiliary holes 204 on the connecting rings 2 and auxiliary rings 201 on both sides, and the positioning guidance of the fastening holes 103 on the valve seat 1, the connecting rings 2 and auxiliary rings 201 are positioned and connected from both sides of the valve seat 1 through the fastening connection of multiple fastening bolts 202 on both sides. By connecting the outer connecting parts to the connecting rings 2 and auxiliary rings 201 at the same time, the valve seat 1 is connected in multiple stages, thereby ensuring its fastening strength during use and enabling the device to have bidirectional multi-stage fixation.

[0026] like Figures 1-5As shown, sealing washers 203 are installed on the outer surfaces of both sides of the connecting ring 2, and sealing washers 203 are installed on both sides of the auxiliary ring 201. The sealing washers 203 are located between several fastening bolts 202.

[0027] The valve seat 1 has positioning grooves 101 on both sides, and the positioning grooves 101 are positioned and inserted into the sealing gasket 203.

[0028] Based on the positioning and insertion of the sealing gaskets 203 on both sides and the positioning grooves 101 on both sides, when the connecting rings 2 and auxiliary rings 201 on both sides are tightly connected to the valve seat 1, the sealing gaskets 203 at the connection point are squeezed and deformed and expanded, thereby ensuring the sealing effect of the connection surface while tightening the connection of the valve seat 1, and ensuring the stability and reliability of the connection during use.

[0029] Example 2: Hard-seal butterfly valve seat fixing device, such as Figures 1-5 As shown, the outer middle part of the valve seat 1 has a hollow fastening space, and the fastening hole 103 penetrates the hollow fastening space.

[0030] Several adjusting cylinders 3 are rotatably installed in the hollow fastening space. A fastening screw hole 301 is provided through the middle of the adjusting cylinder 3. The number and specifications of the fastening screw hole 301 are the same as those of the fastening hole 103 and the auxiliary hole 204.

[0031] Based on the threaded connection of the adjusting cylinder 3 to the fastening bolts 202 on both sides through the fastening screw hole 301, the middle position of the fastening bolts 202 on both sides is fixed again, and the end position of the fastening bolts 202 is reinforced again to ensure the overall stability of the fastening bolts 202 connection. At the same time, it has the effect of limiting the fastening bolts 202 from the middle, improving the overall limiting strength of the fastening bolts 202, and improving the strength of the valve seat 1 during connection, installation and use.

[0032] like Figures 1-5 As shown, a rotating connecting ring 302 is sleeved on the outside of the adjusting cylinder 3. There are at least two rotating connecting rings 302, and a rotating support ring 303 is sleeved on the outside of the two rotating connecting rings 302.

[0033] A limiting ring groove 304 is provided on the inner wall of the rotating support ring 303. The rotating connecting ring 302 is rotatably installed inside the limiting ring groove 304, and the rotating support ring 303 is fixedly installed inside the hollow fastening space.

[0034] By rotating the adjusting cylinder 3, its outer rotating connecting ring 302 simultaneously rotates within the limiting ring groove 304. Based on the rotating support ring 303 fixedly installed on the outer side of the valve seat 1, it provides support for the rotation of the rotating connecting ring 302 while ensuring the stable and accurate position of the rotating connecting ring 302 and the adjusting cylinder 3 during operation. Furthermore, by setting the outer side of the adjusting cylinder 3 to a hexagonal shape, it is easy to rotate and adjust, thereby allowing the fastening bolts 202 on both sides to move towards the center simultaneously, ensuring convenient and stable re-fixing of the fastening bolts 202, and further ensuring the reliability of the device during installation and connection.

[0035] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A hard-seal butterfly valve seat fixing device, comprising a valve seat (1), and connecting rings (2) and auxiliary rings (201) disposed on opposite sides of the valve seat (1), characterized in that, The connecting ring (2) and the auxiliary ring (201) are connected in the same way. The valve seat (1) is provided with a fastening hole (103). The connecting ring (2) and the auxiliary ring (201) are provided with auxiliary holes (204). The fastening hole (103) and the auxiliary holes (204) on both sides are provided with the same number and specifications. The inner wall of the auxiliary hole (204) is threaded with a fastening bolt (202). The fastening bolt (202) is threaded through the auxiliary hole (204) and is also threaded to the inner wall of the fastening hole (103).

2. The hard-seal butterfly valve seat fixing device according to claim 1, characterized in that, The connecting ring (2) has sealing gaskets (203) installed on the outer surfaces of its two opposite sides, and the auxiliary ring (201) has sealing gaskets (203) installed on its two opposite sides. The sealing gaskets (203) are located between a number of fastening bolts (202).

3. The hard-seal butterfly valve seat fixing device according to claim 2, characterized in that, The valve seat (1) has positioning grooves (101) on both sides, and the positioning grooves (101) are positioned and inserted into the sealing gasket (203).

4. The hard-seal butterfly valve seat fixing device according to claim 1, characterized in that, The valve seat (1) has a hollow fastening space in the middle of its outer side, and the fastening hole (103) penetrates the hollow fastening space.

5. The hard-seal butterfly valve seat fixing device according to claim 4, characterized in that, Several adjusting cylinders (3) are rotatably installed in the hollow fastening space. A fastening screw hole (301) is provided through the middle of the adjusting cylinder (3). The number and specifications of the fastening screw hole (301) are the same as those of the fastening hole (103) and the auxiliary hole (204).

6. The hard-seal butterfly valve seat fixing device according to claim 5, characterized in that, A rotating connecting ring (302) is sleeved on the outside of the adjusting cylinder (3). There are at least two rotating connecting rings (302), and a rotating support ring (303) is sleeved on the outside of the two rotating connecting rings (302).

7. The hard-seal butterfly valve seat fixing device according to claim 6, characterized in that, The inner wall of the rotating support ring (303) is provided with a limiting ring groove (304), the rotating connecting ring (302) is rotatably installed inside the limiting ring groove (304), and the rotating support ring (303) is fixedly installed inside the hollow fastening space.

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