CN219692407U

CN219692407U - Automatic rotary exhaust valve

Info

Publication number: CN219692407U
Application number: CN202321231832.5U
Authority: CN
Inventors: 董振友
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-05-22
Filing date: 2023-05-22
Publication date: 2023-09-15
Anticipated expiration: 2033-05-22

Abstract

The utility model discloses an exhaust valve, and particularly relates to an automatic rotary exhaust valve. The automatic rotary exhaust valve has the following structure: the floating ball (2) is arranged in the valve body (1), a spiral valve rod (3) is longitudinally and fixedly arranged at the central position right above the floating ball (2), an outer ring (9) of the guide frame (4) is fixed with the inner wall of the valve body (1), the spiral valve rod (3) is sleeved in a central hole (7) of the guide frame (4), a valve core (5) is fixedly arranged at the upper end of the spiral valve rod (3), and a valve seat (6) is arranged at the position, corresponding to the valve core (5), of the upper wall of the valve body (1). The valve has the characteristics that impurities exist at the joint of the valve core and the valve seat through rotary friction, the sealing performance of the valve is guaranteed, and a certain space is still kept between the upper part of the floating ball and the valve seat after the valve is closed, so that time and space are provided for water-gas separation in circulating water and impurity precipitation in the circulating water.

Description

Automatic rotary exhaust valve

Technical Field

The utility model relates to an exhaust valve, in particular to an automatic rotary exhaust valve.

Background

The water is used as heat carrier in heating system, and after being heated in closed container, it is fed into the equipment for heating by means of pipeline to implement central heating. Heating systems are subject to a number of factors during operation, and the circulating water often has entrained therein a certain amount of air which can only be separated from the water in the stagnant zone. The heating system is a closed circulating system, and how to effectively remove the gas generated in the circulating system during operation is the key for ensuring the normal operation of the system.

To solve this problem, people have installed an automatic exhaust valve at the higher position of the pipeline. The automatic exhaust valve consists of valve body, float ball, valve core, valve seat, etc. When the floating ball in the automatic exhaust valve is subjected to the buoyancy of water, the valve core above the floating ball moves vertically upwards, and the valve core is in close contact with the valve seat until the exhaust hole is sealed. When the water quantity in the exhaust valve is insufficient, the floating ball loses buoyancy and sinks to vacate a certain space, conditions are provided for water-gas separation, and when the water level rises, the floating ball floats up again until the exhaust valve is closed. The operation is repeated in different time, so as to achieve the aim of frequent exhaust.

The circulating water for heating is heated in a closed metal container, and then repeatedly circulated in a pipeline for a long time, and metal oxides and impurities are inevitably generated in the circulating water. When the valve core and the valve seat of the traditional automatic exhaust valve are closed, the contact surface of the valve core and the valve seat needs to achieve a closed condition, and if the contact position of the valve core and the valve seat is once stuck by a water film or impurities in water, the exhaust valve is not tightly closed. The traditional exhaust valve is common in running, overflowing, dripping and leaking phenomena caused by the fact that the exhaust valve is not tightly closed in actual operation, so that certain economic loss is also caused frequently.

Because the floating ball drives the valve core to vertically move up and down under the action of buoyancy, the water film and impurities on the valve core and the valve seat cannot be removed in the movement mode. On the other hand, the distance between the upper part of the floating ball and the valve seat is small, the space for separating water from air is limited, and when the valve core is about to be in contact with the valve seat, the water level in the pipeline also easily exceeds the position of the upper part of the floating ball reaching the valve seat, so that water and air are inevitably caused to overflow simultaneously, and impurities in the water are extremely easy to be brought to the joint part of the valve core and the valve seat, so that the sealing is not tight and water leakage is caused.

Disclosure of Invention

The utility model aims to solve the technical problem of providing an automatic rotary exhaust valve, which has the characteristics that impurities exist at the joint of a valve core and a valve seat through friction, so that the sealing performance of the valve is ensured, and meanwhile, a certain space is still kept between the upper part of a floating ball and the valve seat after the valve is closed, so that time and space are provided for water-gas separation in circulating water and impurity precipitation in the circulating water.

In order to solve the technical problems, the utility model is realized by the following technical scheme:

the automatic rotary exhaust valve comprises a valve body, a floating ball, a valve core and a valve seat, wherein the floating ball is arranged in the valve body, a spiral valve rod is longitudinally and fixedly arranged at the central position right above the floating ball, an outer ring of a guide frame is fixed with the inner wall of the valve body, the spiral valve rod is sleeved in a central hole of the guide frame, the valve core is fixedly arranged at the upper end of the spiral valve rod, and the valve seat is arranged at the position, corresponding to the valve core, of the upper wall of the valve body.

Preferably, the length of the screw valve rod is 1/2-2/3 of the diameter of the floating ball.

Preferably, the screw stem has a plate-like screw structure.

Preferably, the guide frame is composed of an outer ring and an inner ring, the outer ring and the inner ring are connected through reinforcing ribs, and a rectangular center hole is formed in the center of the inner ring.

The utility model has the following characteristics and effects:

the utility model designs the spiral valve rod with the rotation function and the guide frame for controlling the movement of the spiral valve rod and ensuring the spiral valve rod to do rotation movement along the center hole. The floating ball, the spiral valve rod and the valve core are radially and rotatably lifted or rotationally lowered along the central hole of the guide frame under the action force of water, so that the aim of removing impurities at the joint of the valve core and the valve seat through friction is fulfilled, and the sealing performance of the valve is ensured. The utility model still leaves a larger space after the exhaust valve is closed, thereby providing space for water-gas separation and impurity precipitation.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is a schematic view of the guide frame of fig. 1.

In the figure, 1, a valve body, 2, a floating ball, 3, a spiral valve rod, 4, a guide frame, 5, a valve core, 6, a valve seat, 7, a central hole, 8, an outer ring, 9, an inner ring, 10 and a reinforcing rib.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1, the automatic rotary exhaust valve comprises a valve body 1, a floating ball 2, a valve core 5 and a valve seat 6, wherein the floating ball 2 is arranged in the valve body 1, a spiral valve rod 3 is longitudinally and fixedly arranged at the central position right above the floating ball 2, the outer ring of a guide frame 4 is fixed with the inner wall of the valve body 1, the spiral valve rod 3 is sleeved in a central hole of the guide frame 4, the valve core 5 is fixedly arranged at the upper end of the spiral valve rod 3, and the valve seat 6 is arranged at the position, corresponding to the valve core 5, of the upper wall of the valve body 1.

The length of the spiral valve rod 3 is 1/2-2/3 of the diameter of the floating ball, and specifically, the length of the spiral valve rod 3 is 1/2, 7/12 and 2/3 of the diameter of the floating ball. The screw stem 3 has a plate-like screw structure.

As shown in fig. 2, the guide frame 4 is composed of an outer ring 8 and an inner ring 9, the outer ring 8 and the inner ring 9 are connected by a reinforcing rib 10, and a rectangular central hole 7 is formed in the center of the inner ring 9.

Because the spiral valve rod 3 is additionally arranged between the upper part of the floating ball 2 and the valve core 5, the distance between the upper part of the floating ball 2 and the valve seat 6 is increased, and a good steam-water separation space is provided.

The working principle of the automatic rotary exhaust valve is as follows:

when the water level is reduced, the floating ball 2, the spiral valve rod 3 and the valve core 5 simultaneously make rotary descending motion through the guide frame 4, and the exhaust valve is in an open state, so that conditions are created for water-vapor separation in the pipeline. When the water level in the pipeline slowly rises, the floating ball 2, the spiral valve rod 3 and the valve core 5 rise along the central hole 7 of the guide frame 4 in a radial rotation mode under the action of water, gas in the valve is gradually discharged until the rotating valve core 5 is in tight contact with the fixed valve seat 6, and the exhaust valve is closed. When the valve core 5 and the valve seat 6 are in rotary lifting, the valve core 5 and the valve seat 6 generate friction, so that the repeated friction is frequent, water films and impurities in water generated on the surfaces of the valve core 5 and the valve seat 6 are removed in time, and the contact surface of the valve core 5 and the valve seat 6 of the automatic rotary exhaust valve is always in a good working state. After the valve is closed, a certain space is still kept between the upper part of the floating ball 2 and the valve seat 6, so that time and space are provided for water-vapor separation in the circulating water and impurity precipitation in the circulating water.

Claims

1. The utility model provides an automatic rotation type discharge valve, it includes valve body (1), floater (2), case (5), disk seat (6), its characterized in that floater (2) set up in valve body (1), the vertical fixed mounting in central point in floater (2) put has spiral valve rod (3), outer loop (8) and valve body (1) inner wall of leading truck (4) are fixed mutually, spiral valve rod (3) suit is in centre bore (7) of leading truck (4), the upper end of spiral valve rod (3) is fixed and is provided with case (5), disk seat (6) are installed to the position that the upper wall of valve body (1) corresponds case (5).

2. An automatic rotary exhaust valve according to claim 1, characterized in that the length of the screw valve stem (3) is 1/2-2/3 of the diameter of the float ball (2).

3. An automatic rotary exhaust valve according to claim 1 or 2, characterized in that the screw valve stem (3) is of a plate-like screw-shaped structure.

4. The automatic rotary exhaust valve according to claim 1, characterized in that the guide frame (4) is composed of an outer ring (8) and an inner ring (9), the outer ring (8) and the inner ring (9) are connected through a reinforcing rib (10), and a rectangular center hole (7) is formed in the center of the inner ring (9).