Digital locking balance valve

Abstract

The utility model discloses a digital locking balance valve which comprises a valve body, one end of the valve body is fixedly provided with a water inlet pipe, the other end of the valve body is fixedly provided with a water drainage pipe, the surface of the water inlet pipe is fixedly provided with an installation table, and the surface of the installation table is fixedly connected with a waterproof hammer assembly in a threaded mode. A valve seat is installed in the valve body, a valve seat seal is fixedly installed at the bottom of the valve seat, a valve cover is installed on the upper side of the valve seat, a handle cover is installed on the surface of the valve cover, the bottom of the handle cover is connected with a valve rod nut through a valve rod, and the bottom of the valve rod nut is connected with the valve seat. According to the digital locking balance valve, when the valve body is closed, a generated water hammer impacts the interior of the air bag through the mounting table, at the moment, the air bag is stressed to expand, water flow impacts the interior of the containing box, the water pressure is reduced, and therefore the impact force of the water hammer is reduced, and the impact force of the water hammer effect on valve seat sealing in the valve body is reduced; and the sealing performance of the interior of the valve body in a closed state is ensured.

Description

Technical Field

[0001] The utility model relates to the field of digital locking balance valves, and particularly relates to a digital locking balance valve. Background Technique

[0002] A digital locking balance valve is a valve used for static hydraulic condition balance. It has an equal percentage flow characteristic curve and is applicable to centralized flow regulation, centralized quality regulation, and flow regulation systems that change flow in stages. When the system flow changes, the flow of each branch and each user where this valve is installed will increase or decrease proportionally, maintaining the flow distribution scheme during initial regulation.

[0003] However, for existing digital locking balance valves, when they work on pipelines, when the digital locking balance valve is quickly closed, the water flow will continue to flow forward due to inertia, resulting in an instant blockage of the water flow and a sharp increase in pressure, thereby generating positive water hammer; this impacts the valve plug seal in the digital locking balance valve. Over time, the sealing performance of the valve plug seal inside the digital locking balance valve will be reduced. Content of the Utility Model

[0004] The purpose of the utility model is to provide a digital locking balance valve to solve the defects mentioned in the above background technique.

[0005] To achieve the above purpose, a digital locking balance valve is provided, which includes a valve body. One end of the valve body is fixedly installed with a water inlet pipe, and the other end of the valve body is fixedly installed with a drain pipe. At the same time, an installation platform is fixedly arranged on the surface of the water inlet pipe, and a water hammer prevention component is fixedly screwed on the surface of the installation platform; a valve seat is installed inside the valve body, and a valve seat seal is fixedly installed at the bottom of the valve seat. At the same time, a valve cover is installed above the valve seat, and a handle cover is installed on the surface of the valve cover. The bottom of the handle cover is connected to a valve stem nut through a valve stem, and the bottom of the valve stem nut is connected to the valve seat;

[0006] The water hammer prevention component includes a positioning seat inserted inside the installation platform. A receiving box is fixedly installed at the top of the positioning seat. At the same time, an airbag is installed inside the receiving box, and a lining seat is fixedly installed at the bottom of the airbag.

[0007] Preferably, the receiving box is made of metal and has an elliptical cross-sectional structure, and installation pieces are fixedly welded on the outside of the positioning seat at the bottom of the receiving box.

[0008] Preferably, four groups of through holes are evenly opened on the installation pieces, and four groups of screwing holes are evenly opened on the surface of the installation platform. At the same time, the installation pieces cover the surface of the installation platform and are fixed through bolts, and the bolts pass through the through holes and are screwed inside the screwing holes. A sealing connection is made between the installation pieces and the installation platform through a gasket.

[0009] Preferably, the inner lining seat is adapted to the positioning seat in size, and the inner lining seat is attached to the inner wall of the positioning seat and fixed by bolts.

[0010] Preferably, the inner lining seat and the positioning seat are hermetically connected through a gasket, and the cross-section of the airbag at the top of the inner lining seat is arc-shaped.

[0011] Preferably, the inside of the water inlet pipe is communicated with the airbag through a mounting platform, and the expansion volume of the airbag is limited by the accommodating box.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows: when the valve body is closed, the water hammer generated impacts inside the airbag through the mounting platform. At this time, the airbag expands under the force, causing the water flow to impact inside the accommodating box, reducing the water pressure, thereby reducing the impact force of the water hammer and reducing the impact force of the water hammer effect on the valve seat seal inside the valve body, ensuring the sealing performance when the valve body is in a closed state. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a front view schematic diagram of the structure of the present utility model;

[0014] Figure 2 is a schematic diagram of the internal structure of the water hammer prevention component of the structure of the present utility model;

[0015] Figure 3 is a schematic diagram of the water hammer prevention component of the structure of the present utility model;

[0016] Figure 4 is the structure of the present utility model Figure 2 The enlarged schematic diagram of the structure at A in.

[0017] Reference numerals in the figures: 1, water inlet pipe; 2, mounting platform; 3, drain pipe; 4, valve seat; 5, valve stem nut; 6, valve stem; 7, valve seat seal; 8, valve cover; 9, handle cover; 10, water hammer prevention component; 101, accommodating box; 102, positioning seat; 103, mounting piece; 104, inner lining seat; 105, airbag; 11, valve body. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] Please refer to Figures 1-4 , the present utility model provides a digital lock balance valve, including a valve body 11. One end of the valve body 11 is fixedly installed with a water inlet pipe 1, and the other end of the valve body 11 is fixedly installed with a drain pipe 3. At the same time, a mounting platform 2 is fixedly arranged on the surface of the water inlet pipe 1, and a water hammer prevention component 10 is fixedly connected by screwing on the surface of the mounting platform 2; a valve seat 4 is installed inside the valve body 11, and a valve seat seal 7 is fixedly installed at the bottom of the valve seat 4. At the same time, a valve cover 8 is installed above the valve seat 4, and a handle cover 9 is installed on the surface of the valve cover 8. The bottom of the handle cover 9 is connected to the valve stem nut 5 through a valve stem 6, and the bottom of the valve stem nut 5 is connected to the valve seat 4;

[0019] The water hammer prevention assembly 10 includes a positioning seat 102 inserted inside the mounting table 2, and a receiving box 101 is fixedly installed on the top of the positioning seat 102. Meanwhile, an airbag 105 is installed inside the receiving box 101, and a lining seat 104 is fixedly installed at the bottom of the airbag 105.

[0020] Working principle: When in use, when the valve body 11 is closed, the water flow will continue to flow forward due to inertia, resulting in an instant blockage of the water flow, an increase in pressure, and the generated water hammer impacts inside the airbag 105 through the mounting table 2. At this time, the airbag 105 expands under force, causing the water flow to impact inside the receiving box 101, reducing the water pressure, thereby reducing the impact force of the water hammer and reducing the impact force of the water hammer effect on the valve seat seal 7 inside the valve body 11, ensuring the sealing performance when the inside of the valve body 11 is in a closed state.

[0021] As a preferred embodiment, the receiving box 101 is made of metal and has an elliptical cross-sectional structure, and a mounting piece 103 is fixedly welded to the outside of the positioning seat 102 at the bottom of the receiving box 101.

[0022] Four groups of perforations are evenly formed on the mounting piece 103, and four groups of screw holes are evenly formed on the surface of the mounting table 2. Meanwhile, the mounting piece 103 covers the surface of the mounting table 2 and is fixed by bolts, and the bolts pass through the perforations and are screwed into the screw holes. The mounting piece 103 and the mounting table 2 are hermetically connected through a gasket.

[0023] As a preferred embodiment, the lining seat 104 is adapted to the size of the positioning seat 102, and the lining seat 104 is attached to the inner wall of the positioning seat 102 and fixed by bolts.

[0024] The lining seat 104 and the positioning seat 102 are hermetically connected through a gasket, and the cross-section of the airbag 105 at the top of the lining seat 104 is arc-shaped.

[0025] The lining seat 104 and the positioning seat 102 are hermetically connected through a gasket; the mounting piece 103 and the mounting table 2 are hermetically connected through a gasket; ensuring the sealing performance between the two groups of structures.

[0026] The inside of the water inlet pipe 1 is communicated with the airbag 105 through the mounting table 2, and the expansion volume of the airbag 105 is limited by the receiving box 101.

Claims

1. A digital locking balancing valve, comprising a valve body (11), characterized in that: One end of the valve body (11) is fixedly mounted with a water inlet pipe (1), and the other end of the valve body (11) is fixedly mounted with a drain pipe (3); a mounting platform (2) is fixedly arranged on the surface of the water inlet pipe (1), and a water hammer prevention assembly (10) is screwed and fixed to the surface of the mounting platform (2); a valve seat (4) is mounted inside the valve body (11), and a valve seat seal (7) is fixedly mounted on the bottom of the valve seat (4); a valve cover (8) is mounted on the upper side of the valve seat (4), and a handle cover (9) is mounted on the surface of the valve cover (8); the bottom of the handle cover (9) is connected to the valve stem nut (5) through the valve stem (6), and the bottom of the valve stem nut (5) is connected to the valve seat (4); The anti-water hammer assembly (10) comprises a positioning seat (102) inserted into the interior of a mounting platform (2), and a receiving box (101) is fixedly mounted on the top of the positioning seat (102), and an air bag (105) is installed inside the receiving box (101), and a lining seat (104) is fixedly mounted on the bottom of the air bag (105).

2. A digital locking balancing valve according to claim 1, characterized in that: The containing box (101) is made of metal material and has an elliptical cross-section structure, and a fixed mounting plate (103) is welded to the outside of the positioning seat (102) at the bottom of the containing box (101).

3. A digital locking balancing valve according to claim 2, characterized in that: The mounting plate (103) is evenly provided with four groups of through holes, and the surface of the mounting platform (2) is evenly provided with four groups of screw holes. The mounting plate (103) covers the surface of the mounting platform (2) and is fixed by bolts, and the bolts pass through the through holes and are screwed into the inside of the screw holes. The mounting plate (103) and the mounting platform (2) are sealed and connected by a sealing gasket.

4. A digital locking balancing valve according to claim 1, characterized in that: The lining seat (104) is matched to the size of the positioning seat (102), and the lining seat (104) is attached to the inner wall of the positioning seat (102) and fixed by bolts.

5. A digital locking balancing valve according to claim 4, characterized in that: The lining seat (104) and the positioning seat (102) are sealed and connected via a sealing gasket, and the cross section of the airbag (105) at the top of the lining seat (104) is arranged in an arc shape.

6. A digital locking balancing valve according to claim 1, characterized in that: The interior of the water inlet pipe (1) is connected to the air bag (105) via the mounting platform (2), and the expansion volume of the air bag (105) is limited by the containing box (101).

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