CN214888873U

CN214888873U - Servo main valve

Info

Publication number: CN214888873U
Application number: CN202023228944.4U
Authority: CN
Inventors: 周敏杰
Original assignee: Changzhou Amg Refrigeration Equipment Co ltd
Current assignee: Changzhou Amg Refrigeration Equipment Co ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2021-11-26
Anticipated expiration: 2030-12-28

Abstract

The utility model relates to a servo main valve, including valve body and valve gap, the valve body on both ends be provided with inlet port and the port of giving vent to anger respectively about, the valve gap set up in the valve body upper end, the inside case cover that is provided with of valve body, the case cover in be provided with piston assembly, valve gap upper end be provided with the ascending first pilot valve interface of opening and second pilot valve interface, valve gap right side end is provided with the third pilot valve interface that the opening was right, valve gap left side end is provided with the outer mouth of opening left, first pilot valve interface and second pilot valve interface between still be provided with the valve rod seat interface, the valve rod seat interface on be provided with ejector pin assembly, the valve rod seat interface is located the centre of a circle position of valve gap, the utility model discloses a change of interior outer structure and overall arrangement makes the location of valve gap pilot valve more reasonable, the installation is more convenient, the valve body advance, The exhaust is more smooth.

Description

Servo main valve

Technical Field

The utility model belongs to the technical field of the valve technique and specifically relates to a servo main valve.

Background

Servo-main valves are often used for flow regulation and are realized by different pilot valves which are screwed to the main valve or to an externally arranged pilot valve tube. Typically designed for ammonia and other commonly used freon refrigerants, may be used in a pipe return, vent or defrost line.

The existing main valve has some problems in the aspects of external pilot valve interface, internal structure, structure and arrangement of a piston piece, and the like, such as unstable integral structure, troublesome pilot valve positioning and installation, poor sealing performance, unsmooth ventilation and the like, and needs to be improved.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: to address the problems of the background art discussed above, an improved servo main valve is provided.

The utility model provides a technical scheme that its technical problem adopted is: a servo main valve comprises a valve body and a valve cover, wherein the left end and the right end of the valve body are respectively provided with an air inlet port and an air outlet port, the valve cover is arranged at the upper end of the valve body, a valve core sleeve is arranged in the valve body, a piston assembly is arranged in the valve core sleeve, the upper end of the valve cover is provided with a first pilot valve interface and a second pilot valve interface which are opened upwards, the right side end of the valve cover is provided with a third pilot valve interface which is opened rightwards, the left side end of the valve cover is provided with an outer interface which is opened leftwards, a valve rod seat interface is also arranged between the first pilot valve interface and the second pilot valve interface, an ejector rod assembly is arranged on the valve rod seat interface, the valve rod seat interface is positioned at the circle center of the valve cover, the first pilot valve interface, the second pilot valve interface and the valve rod seat interface are positioned on the same straight line, the valve body is cylindrical, and the air inlet port and the air outlet port are conical, the air inlet port and the air outlet port are tangent with the valve body to form an integral structure;

further, the piston assembly of the present invention comprises a piston rod, a spring, a guide valve flap and a guide valve flap pressing plate, wherein the spring is sleeved at the lower end of the piston and is limited in the valve core sleeve, the lower end of the piston rod extends downwards out of the valve core sleeve, the guide valve flap and the guide valve flap pressing plate are fixed at the lower end of the piston rod and are sealed with the valve body when the spring is in an initial state, and the piston assembly is ventilated after being forced to fall;

furthermore, the ejector rod component of the utility model comprises an ejector rod cap, an ejector rod seat and an adjusting ejector rod from top to bottom;

furthermore, the bottom of the guide valve clack of the utility model is provided with a flow guiding groove which is U-shaped or V-shaped and can be set according to different requirements, when the guide valve clack is used as a shut-off valve, a U-shaped opening is adopted, the circulation capacity is strong, the resistance is small, when the guide valve clack is used as an adjusting valve, a V-shaped opening is adopted, and the adjustment is more accurate;

furthermore, a piston guide ring is arranged between the upper end of the piston rod and the inner wall of the valve core sleeve;

furthermore, the middle part and the lower part of the valve core sleeve are respectively provided with an upper sealing ring and a lower sealing ring which are sealed with the valve body;

furthermore, a sealing gasket matched with the lower sealing ring is arranged on the guide valve clack pressing plate;

further, valve rod seat interface be provided with the cross strengthening rib outward for ejector pin subassembly's connection is more stable.

The utility model has the advantages that: the utility model discloses a servo main valve has solved the problem that exists among the conventional art, and the change through interior outer structure and overall arrangement makes the location of valve gap pilot valve reasonable more, the installation is more convenient, and the valve body advance, exhaust more unobstructed, overall structure is also stable more durable simultaneously, and the leakproofness is good, and is very practical.

Drawings

Fig. 1 is a schematic structural view of a preferred embodiment of the present invention;

fig. 2 is a schematic structural view of the middle valve cover of the present invention;

FIG. 3 is a schematic view of the internal structure of the valve body when the spring is in the initial state;

fig. 4 is the internal structure diagram of the valve open state when the middle spring is compressed and deformed.

In the figure: 1. the valve comprises a valve body, a valve cover, a valve inlet, a valve outlet, a valve core sleeve, a first pilot valve interface, a second pilot valve interface, a third pilot valve interface, a valve rod seat interface, a piston, a spring, a guide valve clack pressing plate, a top rod cap, a top rod seat, a regulating top rod, a flow guide groove, a piston guide ring, an upper sealing ring, a lower sealing ring, a sealing gasket and a cross-shaped reinforcing rib, wherein the valve body comprises 2 parts of the valve cover, 3 parts of the gas inlet, 4 parts of the gas outlet, 5 parts of the valve core sleeve, 6 parts of the first pilot valve interface, 7 parts of the second pilot valve interface, 8 parts of the third pilot valve interface, 9 parts of the external interface, 10 parts of the valve rod seat interface, 11 parts of the piston, 12 parts of the spring, 13 parts of the guide valve clack, 14 parts of the guide valve clack pressing plate, 15 parts of the top rod cap, 16 parts of the top rod seat, 17 parts of the regulating top rod, 18 parts of the flow guide groove, 19 parts of the piston guide ring, 20 parts of the upper sealing ring, 21 parts of the lower sealing ring, 22 parts of the sealing ring and the sealing gasket and the cross-shaped reinforcing rib.

Detailed Description

The invention will now be described in further detail with reference to the drawings and preferred embodiments. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.

The embodiment of the servo main valve of the present invention as shown in fig. 1, fig. 2, fig. 3 and fig. 4 comprises a valve body 1 and a valve cover 2, wherein the valve body 1 is provided with an inlet port 3 and an outlet port 4 at the left and right ends thereof, respectively, the valve cover 2 is arranged at the upper end of the valve body 1, the valve body 1 is internally provided with a valve core sleeve 5, a piston assembly is arranged in the valve core sleeve 5, the upper end of the valve cover 2 is provided with a first pilot valve interface 6 and a second pilot valve interface 7 which are opened upwards, the right side end of the valve cover 2 is provided with a third pilot valve interface 8 which is opened rightwards, the left side end of the valve cover 2 is provided with an external interface 9 which is opened leftwards, a valve rod seat interface 10 is further arranged between the first pilot valve interface 6 and the second pilot valve interface 7, the valve rod seat interface 10 is provided with a push rod assembly, and the valve rod seat interface 10 is located at the center of the valve cover 2, the first pilot valve interface 6, the second pilot valve interface 7 and the valve rod seat interface 10 are on the same straight line, the valve body 1 is cylindrical, the air inlet port 3 and the air outlet port 4 are conical, and the air inlet port 3 and the air outlet port 4 are tangentially connected with the valve body 1 to form an integral structure;

the piston assembly comprises a piston 11, a spring 12, a guide valve clack 13 and a guide valve clack pressing plate 14, wherein the spring 12 is sleeved at the lower end of the piston 11 and limited in the valve core sleeve 5, the lower end of the piston 11 extends downwards out of the valve core sleeve 5, the guide valve clack 13 and the guide valve clack pressing plate 14 are fixed at the lower end of the piston 11 and are sealed with the valve body 1 when the spring 12 is in an initial state, and the piston assembly is forced to descend and then is ventilated; the ejector rod assembly comprises an ejector rod cap 15, an ejector rod seat 16 and an adjusting ejector rod 17 from top to bottom; a flow guide groove 18 is formed in the bottom of the guide valve clack 13, the flow guide groove 18 is U-shaped, and a piston guide ring 19 is arranged between the upper end of the piston 11 and the inner wall of the valve core sleeve 5;

the middle part and the lower part of the valve core sleeve 5 are respectively provided with an upper sealing ring 20 and a lower sealing ring 21 which are sealed with the valve body 1; a sealing gasket 22 matched with the lower sealing ring 21 is arranged on the guide valve clack pressing plate 14; the valve rod seat interface 10 is externally provided with a cross-shaped reinforcing rib 23, so that the connection of the ejector rod assembly is more stable.

While the foregoing is directed to embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.

Claims

1. A servo main valve, comprising: the valve comprises a valve body (1) and a valve cover (2), wherein the left end and the right end of the valve body (1) are respectively provided with an air inlet port (3) and an air outlet port (4), the valve cover (2) is arranged at the upper end of the valve body (1), a valve core sleeve (5) is arranged inside the valve body (1), a piston assembly is arranged in the valve core sleeve (5), the upper end of the valve cover (2) is provided with a first pilot valve interface (6) and a second pilot valve interface (7) which are opened upwards, the right side end of the valve cover (2) is provided with a third pilot valve interface (8) which is opened rightwards, the left side end of the valve cover (2) is provided with an external interface (9) which is opened leftwards, a valve rod seat interface (10) is also arranged between the first pilot valve interface (6) and the second pilot valve interface (7), an ejector rod assembly is arranged on the valve rod seat interface (10), and the valve rod seat interface (10) is positioned at the circle center of the valve cover (2), the first pilot valve interface (6), the second pilot valve interface (7) and the valve rod seat interface (10) are on the same straight line, the valve body (1) is cylindrical, the air inlet port (3) and the air outlet port (4) are conical, and the air inlet port (3) and the air outlet port (4) are tangentially connected with the valve body (1) to form an integral structure.

2. A servo main valve as claimed in claim 1 wherein: the piston assembly comprises a piston (11), a spring (12), a guide valve clack (13) and a guide valve clack pressing plate (14), wherein the spring (12) is sleeved at the lower end of the piston (11) and limited in the valve core sleeve (5), the lower end of the piston (11) extends out of the valve core sleeve (5) downwards, and the guide valve clack (13) and the guide valve clack pressing plate (14) are fixed at the lower end of the piston (11) and are sealed with the valve body (1) in the initial state of the spring (12).

3. A servo main valve as claimed in claim 1 wherein: the ejector rod assembly comprises an ejector rod cap (15), an ejector rod seat (16) and an adjusting ejector rod (17) from top to bottom.

4. A servo main valve as claimed in claim 2 wherein: the bottom of the guide valve clack (13) is provided with a flow guide groove (18), and the flow guide groove (18) is U-shaped or V-shaped.

5. A servo main valve as claimed in claim 2 wherein: and a piston guide ring (19) is arranged between the upper end of the piston (11) and the inner wall of the valve core sleeve (5).

6. A servo main valve as claimed in claim 1 wherein: and an upper sealing ring (20) and a lower sealing ring (21) which are sealed with the valve body (1) are respectively arranged on the middle part and the lower part of the valve core sleeve (5).

7. A servo main valve according to claim 6 wherein: and a sealing gasket (22) matched with the lower sealing ring (21) is arranged on the guide valve clack pressing plate (14).

8. A servo main valve as claimed in claim 1 wherein: a cross-shaped reinforcing rib (23) is arranged outside the valve rod seat interface (10).