CN219388771U

CN219388771U - Mechanical liquid level control valve for vacuum system

Info

Publication number: CN219388771U
Application number: CN202320716398.3U
Authority: CN
Inventors: 欧阳开; 李健民; 张正军
Original assignee: Hangzhou Juchuan Environmental Protection Technology Co ltd
Current assignee: Hangzhou Juchuan Environmental Protection Technology Co ltd
Priority date: 2023-04-04
Filing date: 2023-04-04
Publication date: 2023-07-21
Anticipated expiration: 2033-04-04

Abstract

The utility model discloses a mechanical liquid level control valve for a vacuum system, which relates to the technical field of vacuum drainage and comprises a valve body, a valve cover and a trigger mechanism, wherein the valve body is hollow and cup-shaped, and the bottom of the valve body is connected with a gas holding pipe; the valve cover is in a hollow horn shape, the bottom is provided with an air vent communicated with the inside and the outside of the valve cover, the core part is provided with a first guide hole and a second guide hole which are coaxially arranged from the inside to the outside, and the first guide hole and the second guide hole are communicated through an air return port; the triggering mechanism comprises a disc-shaped diaphragm, a pressing sheet, a top ring, a magnet and a guide ring are sequentially arranged above the diaphragm from bottom to top, and a balancing weight is arranged below the diaphragm; the valve body and the open end of the valve cover are buckled, the diaphragm is clamped on the buckling surface to block the cavity formed inside the valve body and the valve cover, so that a normal pressure cavity is formed between the valve cover and the trigger mechanism, and a gas blocking cavity is formed between the valve body and the trigger mechanism. The utility model relies on negative pressure as power to detect liquid level, and has pure mechanical structure to control the vacuum interface valve.

Description

Mechanical liquid level control valve for vacuum system

Technical Field

The utility model relates to the technical field of vacuum drainage, in particular to a mechanical liquid level control valve for a vacuum system.

Background

Since 1881, the first set of negative pressure drainage systems in the world was designed by netherlands engineers, and vacuum drainage technology was rapidly developed in the euler and is becoming more and more perfect. The research and application of the negative pressure drainage system in China are relatively late, and the design concept is introduced for the first time until 2001. At present, the built and built negative pressure drainage engineering is relatively few in China, the corresponding design and construction are multi-reference to international engineering cases, and key equipment and executing elements in the system still depend on import. The pure mechanical control valve for detecting the water level and controlling the opening and closing of the interface valve is always clamped by the neck of the western country, and substitutes gradually appear in China until the last two years, but the performance is still imperfect and needs to be further improved; the Chinese patent with publication number ZL2021212009835 discloses a pneumatic vacuum liquid level control valve, which adopts pneumatic driving trigger mechanism to move, utilizes mechanical structure to match, controls the opening or closing of a vacuum interface valve, completely depends on the water level in a lifter to control, does not need cabling, greatly reduces the installation and use cost, and avoids the instability of the whole system caused by voltage attenuation. However, the control valve is connected or disconnected between the working hole and the negative pressure hole by the upward and downward movement of the magnetic beads under the double effects of magnetic force and air pressure, so that the working hole is positive pressure or negative pressure, and the closing or opening of the vacuum interface valve is controlled; the patent utilizes a plurality of magnet magnetic force difference actions, and the magnetic force of magnet is difficult to quantify, so that the product quality can not be ensured during mass production.

Disclosure of Invention

In order to solve the technical problems, the utility model provides a mechanical liquid level control valve for a vacuum system, which is used for detecting the liquid level by taking negative pressure as power and has a pure mechanical structure to control the opening and closing of a vacuum interface valve.

The technical scheme for solving the technical problems is as follows: a mechanical liquid level control valve for a vacuum system comprises a valve body, a valve cover and a triggering mechanism, wherein the triggering mechanism comprises a disc-shaped diaphragm, a pressing sheet, a top ring, a magnet and a guide ring are sequentially arranged above the diaphragm from bottom to top, a balancing weight is arranged below the diaphragm, and a screw sequentially penetrates through the top ring, the pressing sheet, the diaphragm and the balancing weight from top to bottom to be fixed through threads.

Further, the valve body is hollow and cup-shaped, the bottom is connected with a breath holding pipe, and the breath holding pipe can be set to any length according to the installation height.

Further, the valve cover is in a hollow horn shape, the bottom is provided with an air vent communicated with the inside and the outside of the valve cover, the core part is provided with a first guide hole and a second guide hole coaxially from the inside to the outside, and the first guide hole and the second guide hole are communicated through an air return port; a columnar iron core with a boss is arranged in the first guide hole, a compression spring is sleeved at the boss of the outer ring of the iron core, and a hollow limiting block is arranged at the upper end of the iron core to limit the moving position of the iron core in the first guide hole; the waist of the first guide hole is provided with a working interface communicated with the first guide hole, and the top end of the first guide hole is a negative pressure interface.

Further, the valve body is buckled with the open end of the valve cover, the diaphragm is clamped on the buckling surface, a cavity formed inside the valve body and the valve cover is blocked, a normal pressure cavity is formed between the valve cover and the triggering mechanism, and an air blocking cavity is formed between the valve body and the triggering mechanism.

Further, the guide ring at the top of the trigger mechanism is in interference fit with the top ring, is arranged in the second guide hole and is in clearance fit with the second guide hole.

Further, the air vent is communicated with the air return port.

Further, the iron core is magnetically conductive, the upper end face and the lower end face are provided with rubber or silica gel planes and are in clearance fit with the first guide holes, and the iron core can move up and down in the first guide holes.

Further, the groove can be arranged on the columnar surface of the iron core, and when the upper end surface of the iron core is contacted with the lower end surface of the limiting block, the working interface can be communicated with the air return port through a gap or the groove.

The beneficial effects of the utility model are as follows: the valve body is connected with the air-holding pipe arranged in the lifter, the air pressure in the air-holding cavity changes along with the change of the liquid level in the lifter, and the air pressure in the air-holding cavity is used for driving the magnet to move up and down, so that the iron core is controlled to move up and down, the negative pressure of the working interface is converted with the normal pressure, and the opening or closing of the vacuum interface valve is controlled.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. Like elements or portions are generally identified by like reference numerals throughout the several figures. In the drawings, elements or portions thereof are not necessarily drawn to scale.

Fig. 1 is a schematic perspective view of an embodiment of the present utility model.

Fig. 2 is a schematic cross-sectional structure (closed state) of an embodiment of the present utility model.

Fig. 3 is a schematic cross-sectional structure (open state) of an embodiment of the present utility model.

Fig. 4 is a schematic cross-sectional structure (closed state) of the second embodiment of the present utility model.

Description of the embodiments

Embodiments of the technical scheme of the present utility model will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and thus are merely examples, and are not intended to limit the scope of the present utility model.

It is noted that unless otherwise indicated, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

As shown in fig. 1 and 2, a mechanical liquid level control valve for a vacuum system comprises a valve body 2, a valve cover 1 and a trigger mechanism, wherein the valve body 2 is hollow and cup-shaped, and the bottom of the valve body is connected with a gas holding pipe 3; the valve cover 1 is in a hollow horn shape, the bottom is provided with an air vent 101 which is communicated with the inside and the outside of the valve cover, the core part is provided with a first guide hole 106 and a second guide hole 107 which are coaxially arranged from the inside to the outside, and the first guide hole and the second guide hole are communicated through an air return port 104; a columnar iron core 5 with a boss is arranged in the first guide hole, rubber or silica gel is arranged at the upper end surface and the lower end surface of the iron core, a compression spring 6 is sleeved at the boss of the outer ring of the iron core, and a hollow limiting block 4 is arranged at the upper end of the iron core to limit the moving position of the iron core in the first guide hole; the waist of the first guide hole 106 is provided with a working interface 103 which is communicated with the first guide hole, and the top end of the first guide hole is provided with a negative pressure interface 102; the triggering mechanism comprises a disc-shaped diaphragm 10, and screws sequentially penetrate through the top ring 9, the pressing sheet 11, the diaphragm 10 and the balancing weight 12 from top to bottom to be fixed in a threaded manner.

The valve body 2 and the open end of the valve cover 1 are buckled, the diaphragm 10 is clamped on the buckling surface to block the cavity formed inside the valve body and the valve cover, so that a normal pressure cavity 105 is formed between the valve cover and the triggering mechanism, and a gas blocking cavity 201 is formed between the valve body and the triggering mechanism. The guide ring 7 at the top of the triggering mechanism is in interference fit with the top ring 9, is arranged in the second guide hole 107 and is in clearance fit with the second guide hole; the vent 101 communicates with the return air port 104.

Embodiment of a mechanical liquid level control valve for a vacuum system-closed state: as shown in fig. 2, the valve body 2 is connected with the air-holding pipe 3 arranged in the lifter, the air pressure in the air-holding cavity 201 rises and falls along with the rise and fall of the liquid level in the lifter, when the pressure generated by the air pressure in the air-holding cavity is insufficient to jack up the trigger mechanism, the magnet 8 is positioned at the lower end, the downward suction force to the iron core 5 is insufficient to overcome the upward elastic force of the compression spring 6 to the iron core, the iron core is acted by the upward resultant force, the upper end surface of the iron core is tightly pressed on the bottom surface of the limiting block 4, so that the negative pressure interface 102 and the working interface 103 are disconnected, the working interface and the vent 101 are connected, the working interface is at normal pressure, and the vacuum interface valve is closed at the moment.

Embodiment of mechanical liquid level control valve for vacuum system-open state: as shown in fig. 3, the valve body 2 is connected with the air holding pipe 3 arranged in the lifter, the air pressure in the air holding cavity 201 rises and falls along with the rise and fall of the liquid level in the lifter, when the pressure generated by the air pressure in the air holding cavity jacks up the trigger mechanism, the magnet 8 is positioned at the top end, the downward suction force to the iron core 5 is larger than the upward elastic force of the compression spring 6 to the iron core, the iron core is acted by downward resultant force, the lower end surface of the iron core is tightly pressed on the air return port 104, so that the negative pressure interface 102 and the working interface 103 are connected, the working interface and the air vent 101 are disconnected, the working interface is at negative pressure, and the vacuum interface valve is opened at the moment.

In a second embodiment of a mechanical liquid level control valve for a vacuum system, as shown in fig. 4, a trigger mechanism comprises a compression spring II 13 and a disc-shaped diaphragm 10, wherein a pressing sheet 11, a top ring 9, a magnet 8 and a guide ring 7 are sequentially arranged on the diaphragm from bottom to top, and bolts sequentially penetrate through the top ring, the pressing sheet and the diaphragm from top to bottom to be fixed; the compression spring II 13 is arranged between the valve cover 1 and the guide ring 7. When the air pressure in the air-blocking cavity 201 is insufficient to overcome the elasticity of the compression spring II 13, the magnet 8 is positioned at the lower end, the downward suction force to the iron core 5 is insufficient to overcome the upward elasticity of the compression spring 6 to the iron core, the iron core is acted by the upward resultant force, the upper end surface of the iron core is tightly pressed on the bottom surface of the limiting block 4, so that the negative pressure interface 102 and the working interface 103 are disconnected, the working interface and the vent 101 are connected, the working interface is at normal pressure, and the vacuum interface valve is closed at the moment; when the air pressure in the air-holding cavity 201 is greater than the elasticity of the compression spring II 13, the magnet 8 is positioned at the top end, the downward suction force to the iron core 5 is greater than the upward elasticity of the compression spring 6 to the iron core, the iron core is acted by downward resultant force, and the lower end surface of the iron core is tightly pressed on the air return port 104, so that the negative pressure interface 102 and the working interface 103 are connected, the working interface 103 and the air vent 101 are disconnected, the working interface is in negative pressure, and the vacuum interface valve is opened at the moment.

Claims

1. A mechanical liquid level control valve for a vacuum system comprises a valve body (2), a valve cover (1) and a trigger mechanism, and is characterized in that the trigger mechanism comprises a disc-shaped diaphragm (10), a pressing sheet (11), a top ring (9), a magnet (8) and a guide ring (7) are sequentially arranged above the diaphragm from bottom to top, a balancing weight (12) is arranged below the diaphragm, and a screw sequentially penetrates through the top ring, the pressing sheet, the diaphragm and the balancing weight from top to bottom to be fixed in a threaded manner.

2. The mechanical liquid level control valve for a vacuum system according to claim 1, wherein the valve body (2) is hollow and cup-shaped, and the bottom is connected with a breath holding pipe (3) which can be set to any length according to the installation height.

3. The mechanical liquid level control valve for a vacuum system according to claim 1, wherein the valve cover (1) is in a hollow horn shape, a vent (101) is arranged at the bottom and communicated with the inside and the outside of the valve cover, a first guide hole (106) and a second guide hole (107) are coaxially arranged from the core part to the inside and the outside, and the first guide hole and the second guide hole are communicated through a return vent (104); a columnar iron core (5) with a boss is arranged in the first guide hole, a compression spring (6) is sleeved at the boss of the outer ring of the iron core, and a hollow limiting block (4) is arranged at the upper end of the iron core to limit the moving position of the iron core in the first guide hole; the waist of the first guide hole is provided with a working interface (103) which is communicated with the first guide hole, and the top end of the first guide hole is provided with a negative pressure interface (102).

4. A mechanical liquid level control valve for a vacuum system according to claim 3, wherein the valve body (2) is fastened to the open end of the valve cover (1), and the diaphragm (10) is clamped on the fastening surface to block the cavity formed by the valve body and the valve cover, so that a normal pressure cavity (105) is formed between the valve cover and the trigger mechanism, and a gas blocking cavity (201) is formed between the valve body and the trigger mechanism.

5. A mechanical liquid level control valve for a vacuum system according to claim 3, characterized in that the guide ring (7) at the top of the trigger mechanism is in interference fit with the top ring (9), is arranged in the second guide hole (107), and is in clearance fit with the second guide hole.

6. A mechanical liquid level control valve for a vacuum system according to claim 3, characterized in that the vent (101) communicates with a return air port (104).

7. A mechanical liquid level control valve for a vacuum system according to claim 3, wherein the iron core (5) is magnetically conductive, and the upper and lower end surfaces are provided with rubber or silica gel planes and are in clearance fit with the first guide holes (106), and the iron core can move up and down in the first guide holes.

8. The mechanical liquid level control valve for a vacuum system according to claim 7, wherein a groove can be arranged on the columnar surface of the iron core (5), and when the upper end surface of the iron core is contacted with the lower end surface of the limiting block (4), the working interface (103) can be communicated with the air return port (104) through a gap or the groove.

9. A mechanical liquid level control valve for a vacuum system according to claim 1, characterized in that the trigger mechanism is further provided with a compression spring two (13) between the valve cover (1) and the guide ring (7), and the downward force of the trigger mechanism is replaced by the gravity of the weight iron (12) by the downward elastic force of the compression spring two pair of trigger mechanisms.