CN204852491U - Automatic water compensating valve - Google Patents

Abstract

The utility model discloses an automatic water replenishment valve, which is usually installed on the water replenishment pipeline of a closed-cycle heating system or a refrigeration system. , ejector rod and piston, etc., mainly adding a filter screen at the water inlet, and adding a check seat and a check spring at the water outlet. In addition to the automatic water replenishment function, it also has the filter function of the water inlet, the check function and the cut-off function of the water outlet, so the function of the improved automatic water replenishment valve is more abundant and diverse, so as to provide protection for the closed circulation system more reasonably and safely ; At the same time, the piston structure in the valve cavity is also improved, and the automatic water replenishment valve is opened and closed by using a unique and reliable piston with structural design, so as to effectively prevent the occurrence of automatic water replenishment failure and avoid safety hazards during use.

Description

Automatic filling valve

technical field

The utility model relates to a pipeline automatic valve installed in a closed circulation system, in particular to an automatic water supply valve.

Background technique

The automatic filling valve is a common automatic pipeline valve, which is mostly installed on the water supply pipeline of the heating system or refrigeration system in the closed cycle, and can be used to keep the system pressure at a stable value, such as wall-hung boilers, small boilers, and central air-conditioning water systems The automatic replenishment valve will be used to replace the traditional water tank replenishment, thus effectively simplifying the system structure. The work of the automatic water replenishment valve is as follows: when the system pressure drops, the automatic water replenishment valve will automatically open to replenish water to the system, and when the set pressure is reached, the automatic water replenishment valve will automatically close; therefore, the automatic water replenishment valve is also a reliable safety valve.

At present, most of the automatic water replenishment valve structures are composed of valve body, valve chamber, water inlet, water outlet, pressure regulating bolt, pressure regulating spring, knob, ejector rod and piston, etc., generally only undertake the function of automatic water replenishment, and In actual use, it is often found that when the water inlet of the automatic replenishment valve is designed with a filtering function or the water outlet is designed with a check function, it not only achieves the multi-functional use effect of the combined valve, but also can be more reasonable and safe. However, the automatic water replenishment valve with a single water replenishment function obviously cannot meet the needs of the market; at the same time, these automatic water replenishment valves also have the defect that the design of the piston opening and closing structure is not reliable enough. The failure of the automatic water replenishment due to the problem occurs, which brings safety hazards to the use.

Contents of the invention

The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide an automatic water replenishment valve integrated with automatic water replenishment function, water inlet filter function, water outlet check function and cut-off function. The piston of the automatic water replenishment valve The opening and closing structure is uniquely designed and reliable, and can effectively avoid potential safety hazards during use.

The technical problem of the utility model is realized through the following technical solutions:

An automatic water replenishing valve, comprising a valve body, a valve cavity arranged in the valve body, and a water inlet and a water outlet arranged on the side of the valve body; the top of the valve cavity is provided with a pressure regulating bolt and a pressure regulating spring, and the bottom of the valve cavity There is a knob and a push rod at the end, and a piston for axial lifting and moving is arranged in the valve chamber. The water inlet is provided with a filter, and the water outlet is provided with a check seat and an elastic push check seat to seal the opening and closing of the water outlet. Check spring.

The shape of the filter screen is spherical, the filter screen is embedded and fixed on the filter gasket, the water inlet is provided with a water inlet joint that connects and compresses the filter gasket, and the spherical surface of the filter screen is convex. The shape is set inside, and the spherical concave shape is set outside.

The inner end surface of the non-return seat is provided with a convex ring for sealing the water outlet, and the outer end surface of the non-return seat is provided with a spring column for pushing and installing the inner end of the non-return spring.

The water outlet is provided with an embedded and fixed clip ring, and the outer end of the non-return spring is pushed and arranged on the clip ring.

A reserved hole is arranged outside the water outlet, and a plug is installed in the reserved hole.

The middle part of the valve cavity is provided with a valve seat, the upper valve cavity of the valve seat is set as a water outlet cavity, and the valve cavity of the lower part of the valve seat is set as a water inlet cavity; the lower end of the piston passes through the valve seat and is provided with a valve disc. The water inlet and outlet chambers are sealed and opened and closed by the axial lifting movement of the piston; the water inlet is connected to the water inlet chamber, and the water outlet is connected to the water outlet chamber.

The lower end of the valve body is provided with a sealed knob seat, and the upper end of the ejector rod is rotated and sealed in the knob seat, and the lower end of the ejector rod extends out of the knob seat to fix the connection knob; Axial lifting movement.

The lower end of the piston is provided with a valve disc seat for fixing the valve disc, and the lower end of the valve disc seat moves and seals into the knob seat, and the upper end of the ejector rod is in contact with the valve disc seat.

The valve seat is a water hole arranged in the middle of the valve cavity, and the lower surface of the water hole is provided with a boss in sealing contact with the valve disc.

The upper end of the valve body is provided with a sealed valve cover, and the top of the valve cover is provided with a pressure regulating bolt that is threaded. The lower end of the pressure regulating bolt extends into the valve cover, and the pressure regulating spring is arranged on the valve cover Inside, the upper end of the pressure regulating spring is pushed and installed on the lower end of the pressure regulating bolt, and the lower end of the pressure regulating spring is pushed and installed on the upper end of the piston.

Compared with the prior art, the utility model mainly adds a filter screen to the water inlet of the automatic water replenishment valve, and a check seat and a check spring to the water outlet. The use effect, that is, on the basis of the automatic water replenishment function, it also has the filter function of the water inlet, the check function and the cut-off function of the water outlet, etc. Therefore, the improved automatic water replenishment valve has more diverse functions, so that it is more reasonable and safe. The closed circulation system provides protection; at the same time, the piston structure in the valve chamber is also improved, and the automatic water replenishment valve is opened and closed by using a unique and reliable piston with structural design, thereby effectively preventing the occurrence of automatic water replenishment failure and avoiding the use of safety hazards in the process.

Description of drawings

Fig. 1 is a schematic cross-sectional structure diagram of the utility model.

Fig. 2 is a schematic cross-sectional structure diagram of the check seat.

Detailed ways

The embodiment of the utility model will be described in detail again below according to the above-mentioned accompanying drawings.

As shown in Figure 1 and Figure 2, 1. Knob, 2. Push rod, 3. Disc seat, 4. Valve body, 41. Water inlet chamber, 42. Water outlet, 43. Reserved hole, 44. Water outlet chamber , 45. Water inlet, 5. Non-return spring, 6. Non-return seat, 61. Spring column, 62. Convex ring, 7. Circlip, 8. Plug, 9. Piston, 10. Regulating spring, 11. Pressure regulating bolt, 12. Valve cover, 13. Filter screen, 14. Filter gasket, 15. Water inlet joint, 16. Valve seat, 17. Valve disc, 18. Knob seat.

The automatic water replenishment valve, as shown in Figure 1, relates to an automatic valve installed on the water replenishment pipeline of a closed-loop heating system or refrigeration system. It can effectively maintain the system pressure at a stable value. Its structure is mainly composed of valve body 4. Consists of water inlet 45, water outlet 42, pressure regulating bolt 11, pressure regulating spring 10, knob 1, push rod 2 and piston 9, etc.

The valve body 4 is provided with an upper and lower through valve cavity, and the upper end of the valve body 4 is provided with a valve cover 12 installed in a threaded seal, and the top of the valve cavity is closed by the valve cover; the lower end of the valve body 4 is provided with a sealing device. Knob seat 18, and the bottom end of the valve chamber is closed by the knob seat; the side of the valve body 4 is respectively provided with a water inlet 45 and a water outlet 42, and the axis line of the water channel of the inlet and outlet is on the same horizontal line, and at the same time The axis lines of the water channel of the valve cavity are vertical.

The piston 9 is arranged in the valve chamber for axial lifting and moving, and cooperates with the valve seat 16 provided in the valve chamber to form a sealed opening and closing relationship. The structure is: the valve seat 16 is a The water hole, the lower surface of the water hole is provided with a ring of bosses, and the valve cavity is divided into an upper part and a lower part by the valve seat 16, that is, the upper valve cavity of the valve seat 16 is set as the water outlet cavity 44, and the lower part of the valve seat 16 The valve chamber is set as the water inlet chamber 41 , the water outlet chamber 44 under normal conditions is directly connected with the water outlet 42 , and the water inlet chamber 41 is directly connected with the water inlet 45 .

The water outlet chamber 44 is actually an annular accommodation space reserved between the piston 9 and the inner peripheral surface of the valve body 4, and an "O" ring is also provided on the outer peripheral surface of the upper end of the piston 9 to connect with the valve body. 4. The sealing contact between the inner circumferential surfaces; the lower end of the piston 9 passes through the valve seat 16 and is provided with a valve disc 17 which is threaded and fixedly installed by the valve disc seat 3; wherein, the lower end of the valve disc seat 3 is movable into the knob seat 18 Inside, an "O" ring is provided on the outer peripheral surface of the disc seat 3 as a dynamic seal, so as to form a movable sealing contact with the inner surface of the knob seat 18; Contact or break away from the boss of the valve seat 16, thereby sealing the opening and closing of the water inlet and outlet chambers; the opening and closing structure of the above-mentioned piston 9 has a unique and reliable design, which can effectively prevent the valve from failing to automatically replenish water and avoid safety hazards during use. Hidden danger.

The pressure regulating bolt 11 is threadedly connected to the top of the valve cover 12, and the lower end of the pressure regulating bolt 11 extends into the valve cover 12; the pressure regulating spring 10 is arranged in the valve cover 12, and the pressure regulating spring 10 adopts a cylindrical spring , the upper end of which is pushed on the spring seat set at the lower end of the pressure regulating bolt 11, and the lower end is pushed on the spring seat set on the upper end of the piston 9, so under normal conditions, under the push of the pressure regulating spring 10, the piston 9 is always It has a tendency to move downward; when the pressure regulating bolt 11 is rotated, the compression amount of the pressure regulating spring 10 can be adjusted to obtain the preset pressure required by the automatic water replenishing valve.

The upper end of the ejector rod 2 is rotatably installed in the knob seat 18, and is in contact with the disc seat 3 which is pushed down by the pressure regulating spring 10 and moves downward. The "O" ring is in contact with the inner circumferential surface of the knob seat 18 for sealing; the lower end of the push rod 2 protrudes from the knob seat 18 and is fixedly connected to the knob 1; the rotation of the knob 1 can drive the push rod 2 to move up and down in the axial direction Movement, that is, the push piston 9 overcomes the elastic force of the pressure regulating spring 10 to move up and down, thereby realizing the cut-off function. The design structure of the knob 1 and the ejector rod 2 is mainly used for temporary closing and maintenance of the valve.

The water inlet 45 is provided with a filter screen 13, which is spherical in shape and embedded and fixed on the filter pad 14 to form an integrated part. When the filter pad 14 sets the filter screen 13 on the Inside, the spherical concave shape is arranged outside and installed in the water inlet 45. At this time, it is only necessary to connect and compress the filter gasket 14 through the threaded water inlet joint 15; therefore, the design of the filter screen 13 makes the water inlet 45 It has the function of filtering impurities.

The water outlet 42 is provided with a non-return seat 6 and a non-return spring 5 made of rubber; the non-return seat 6 is shown in Figure 2, and its inner end surface is provided with a convex ring 62, and the outer end surface of the non-return seat 6 is provided with a spring post 61; the non-return spring 5 adopts a conical spring, the small conical end of the non-return spring 5 is pushed and installed on the spring column 61 on the outer end surface of the non-return seat 6, and the large conical end of the non-return spring 5 is pushed and installed in the water outlet 42 Embedded on the fixed circlip 7, it is pushed by the elasticity of the non-return spring 5 so that the convex ring 62 on the inner end surface of the non-return seat 6 seals the opening and closing of the water outlet 42; when the valve is closed, the non-return seat 6 will close the water outlet 42, to prevent the backflow of water in the system; when the valve is opened, the check seat 6 will be pushed by the water pressure in the system to open the water outlet 42. The water outlet 42 is also provided with a reserved hole 43, in which a plug 8 is temporarily installed, which can be used to connect auxiliary components such as pressure gauges during use.

The utility model is an automatic water replenishment valve integrated with automatic water replenishment function, water inlet filter function, water outlet check function and cut-off function. The circulatory system provides protection.

Claims (10)

1. An automatic water replenishing valve, comprising a valve body (4), a valve cavity arranged in the valve body (4), and a water inlet (45) and a water outlet (42) arranged on the side of the valve body (4); The top of the valve chamber is provided with a pressure regulating bolt (11) and a pressure regulating spring (10), the bottom of the valve chamber is provided with a knob (1) and a push rod (2), and the valve chamber is provided with a piston ( 9), characterized in that the water inlet (45) is provided with a filter (13), and the water outlet (42) is provided with a non-return seat (6) and an elastic push-back non-return seat (6) to seal the water outlet (42) of the non-return spring (5). 2. The automatic water filling valve according to claim 1, characterized in that the shape of the filter (13) is spherical, the filter (13) is embedded and fixed on the filter gasket (14), and the filter The water inlet (45) is provided with a water inlet joint (15) connected to and pressed against the filter gasket (14), the spherical convex shape of the filter screen (13) is set inside, and the spherical concave shape is set outside. 3. The automatic water filling valve according to claim 1, characterized in that the inner end surface of the check seat (6) is provided with a convex ring (62) for sealing the water outlet (42), and the outer end surface of the check seat (6) is A spring column (61) is provided for pushing and installing the inner end of the non-return spring (5). 4. The automatic replenishment valve according to claim 1, characterized in that the water outlet (42) is provided with an embedded and fixed clip spring (7), and the outer end of the non-return spring (5) is pushed to set on the circlip (7). 5. The automatic water filling valve according to claim 1, characterized in that a reserved hole (43) is arranged outside the water outlet (42), and a plug (8) is installed in the reserved hole. 6. The automatic replenishment valve according to any one of claims 1 to 5, characterized in that a valve seat (16) is provided in the middle of the valve cavity, and the upper valve cavity of the valve seat is set as a water outlet cavity (44). The lower valve chamber of the seat (16) is set as the water inlet chamber (41); the lower end of the piston (9) passes through the valve seat (16) and is provided with a valve disc (17), which is affected by the axial direction of the piston (9). Lifting and moving to seal and open and close the water inlet and outlet chambers; the water inlet (45) communicates with the water inlet chamber (41), and the water outlet (42) communicates with the water outlet chamber (44). 7. The automatic replenishment valve according to claim 6, characterized in that the lower end of the valve body (4) is provided with a knob seat (18) which is sealed and installed, and the upper end of the ejector rod (2) is rotated and sealed on the knob In the seat (18), the lower end of the ejector rod (2) protrudes from the knob seat (18) and is fixedly connected to the knob (1); the upper end of the ejector rod (2) is rotated by the knob (1) to move axially up and down. 8. The automatic replenishment valve according to claim 7, characterized in that the lower end of the piston (9) is provided with a disc seat (3) for fixing the disc (17), and the lower end of the disc seat is movable and sealed into the knob In the seat (18), the upper end of the ejector rod (2) is in contact with the disc seat (3). 9. The automatic replenishment valve according to claim 6, characterized in that the valve seat (16) is a water hole arranged in the middle of the valve chamber, and the lower surface of the water hole is provided with a Petal (17) is made the boss of sealing contact. 10. The automatic replenishment valve according to claim 1, characterized in that the upper end of the valve body (4) is provided with a sealed valve cover (12), and the top of the valve cover is provided with a threaded pressure regulating bolt (11), the lower end of the pressure regulating bolt extends into the valve cover (12), the pressure regulating spring (10) is set in the valve cover (12), and the upper end of the pressure regulating spring (10) is pushed and installed on the regulating valve Press the lower end of the bolt (11), and the lower end of the pressure regulating spring (10) is pushed and installed on the upper end of the piston (9).