A pressure superimposition valve

Abstract

The utility model provides a kind of air pressure superposition valve, comprising: main valve body, gas flange, cylinder, pilot solenoid valve and valve core, main valve body includes valve body shell, first valve cavity and second valve cavity are provided with in valve body shell intercommunication, first valve cavity is connected with the main valve air inlet hole being arranged on the side surface of valve body shell, gas flange is installed in the top of valve body shell, gas flange is provided with the gas outlet hole being interconnected with second valve cavity, cylinder is installed in the left side end of main valve body, after valve core is installed in the cavity between the second valve cavity of valve body shell along transverse and penetrates baffle in cylinder body, pilot solenoid valve is installed on the left side end of cylinder cover, the pilot solenoid valve is provided with respectively with the valve core right push air hole and the valve core left push air hole being interconnected with valve core right push vent hole and valve core left push vent hole. The present air pressure superposition valve structure design is reasonable, easy to process, low in manufacturing cost, and high in control precision.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field, concretely relates to a gas pressure superposition valve. BACKGROUND

[0002] Compared with the traditional check valve, the biggest feature of the superposition valve is that it can achieve the purpose of system installation without using the pipe, thus reducing the leakage, vibration and noise of the system. Compared with the traditional pipe connection, the superposition valve does not require special installation skills and is very convenient to change the function of the system. Since the pipe is not required, the overall reliability of the system is enhanced, and it is convenient for daily inspection and maintenance.

[0003] The existing gas pressure superposition valve has a complex internal structure design, high manufacturing cost and low control precision, especially poor control precision for large flow, and therefore needs to be improved. CONTENT OF THE UTILITY MODEL

[0004] In view of the deficiency of the prior art, the utility model provides a gas pressure superposition valve which simplifies the design of the valve structure and can greatly improve the control precision of the large flow main valve by using the pilot electromagnetic valve to control the action of the large flow main valve.

[0005] To achieve the above technical scheme, the utility model provides a gas pressure superposition valve, which comprises a main valve body, a gas outlet flange, a cylinder, a pilot electromagnetic valve and a valve core. The main valve body comprises a valve body shell, the valve body shell is provided with a first valve body cavity and a second valve body cavity which are connected in communication, the first valve body cavity is connected with a main valve air inlet hole provided on the side surface of the valve body shell, the gas outlet flange is installed on the top of the valve body shell, the gas outlet flange is provided with a gas outlet hole which is connected in communication with the second valve body cavity, the cylinder is installed on the left end of the main valve body, the cylinder comprises a cylinder body, the right end of the cylinder body is fixed on the left end of the valve body shell, a cavity provided in the cylinder body is connected in communication with the second valve body cavity on the valve body shell, a partition plate is installed in the cavity provided in the cylinder body, a limiting cavity is provided on the left side of the partition plate, the left end of the cylinder body is closed by a cylinder cover, the cylinder cover is provided with a valve core right push air hole and a valve core left push air hole, the valve core left push air hole is connected in communication with the limiting cavity, the valve core right push air hole is connected in communication with the left side of the cavity provided in the cylinder body, the valve core is installed between the cavity provided in the cylinder body and the second valve body cavity of the valve body shell after penetrating the partition plate in the transverse direction, the pilot electromagnetic valve is installed on the left end of the cylinder cover, the pilot electromagnetic valve is provided with a valve core right push inlet air hole and a valve core left push inlet air hole which are connected in communication with the valve core right push air hole and the valve core left push air hole respectively.

[0006] In the above technical solution, during actual operation, a pilot solenoid valve is used to precisely control the action of the large-flow main valve body. The pilot solenoid valve is a normally open solenoid valve. When not energized, the right push air hole of the valve core is open and the left push air hole of the valve core is closed. Gas enters the left side of the cylinder body from the right push air hole of the valve core through the right push air hole of the valve core, pushing the valve core to move to the right. The valve core seals the first valve body cavity set in the valve body shell. At this time, the first valve body cavity and the second valve body cavity in the valve body shell are disconnected, and the main valve body is closed. When the pilot solenoid valve is energized, the right push air port of the valve core closes and the left push air port of the valve core opens. Gas enters the limiting cavity set in the cylinder body from the left push air port of the valve core through the left push air port of the valve core, pushing the valve core to move to the left. At this time, the first valve body cavity and the second valve body cavity in the valve body shell are connected, and the main valve body is opened. External gas connected to the main valve body can enter the first valve body cavity and the second valve body cavity from the main valve inlet port, and finally be delivered outward through the outlet port set on the outlet flange. The distance the valve core moves to the left can be precisely controlled by the pilot solenoid valve, thereby precisely controlling the flow rate of the main valve body.

[0007] Preferably, the valve core includes a piston body, which is installed transversely through a partition between a cavity inside the cylinder body and a second valve body cavity in the valve body housing. An end-positioning sealing ring is installed at the right end of the piston body, and the diameter of the end-positioning sealing ring is larger than the outlet diameter of the first valve body cavity inside the valve body housing. In actual operation, when the piston body is pressed to the right, the end-positioning sealing ring can seal the first valve body cavity, thereby disconnecting the first and second valve body cavities.

[0008] Preferably, a buffer pad is installed on the inner side of the cylinder head to protect the left end of the piston body.

[0009] Preferably, the vent flange includes a flange body, which is fixed to the top of the valve body housing by flange fixing screws. The flange body has a vent hole at its center, which is connected to the top of the second valve body cavity.

[0010] Preferably, a sealing ring is installed at the contact point between the piston body and the inner side of the cylinder body to improve the sealing performance at the contact point between the piston body and the inner side of the cylinder body.

[0011] Preferably, the pilot solenoid valve is a normally open solenoid valve.

[0012] The air pressure superposition valve has the advantages that the structure design is reasonable, processing is convenient, manufacturing cost is low, the action of the large-flow main valve can be controlled through the pilot electromagnetic valve, and the control precision of the large-flow main valve can be greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a front view of the utility model.

[0014] Figure 2 It is a sectional view of the utility model.

[0015] Figure 3 It is a top view of the utility model.

[0016] Figure 4 It is a left view of the utility model.

[0017] Figure 5 It is a right view of the utility model.

[0018] In the drawing: 1, main valve body; 11, valve body shell; 12, first valve cavity; 13, second valve cavity; 2, gas outlet flange; 21, flange body; 22, flange fixing screw; 23, gas outlet hole; 3, cylinder; 31, cylinder body; 32, cylinder cover; 33, cylinder cover fixing screw; 34, valve core left push air hole; 35, valve core right push air hole; 36, buffer pad; 37, limiting cavity; 38, partition; 39, sealing ring; 4, pilot electromagnetic valve; 41, electromagnetic valve body; 42, valve core right push air hole; 43, valve core left push air hole; 5, valve core; 51, piston body; 52, end limiting sealing baffle ring. DETAILED DESCRIPTION

[0019] Clearly, the described embodiments are merely a part of the embodiments of the present application, but not all the embodiments. All the other embodiments obtained by those of ordinary skill in the art without creative labor fall within the protection scope of the present application.

[0020] Embodiment: A gas pressure superposition valve.

[0021] Referring to Figures 1 to 5 As shown in the figure, a gas pressure superposition valve comprises a main valve body 1, an air outlet flange 2, a cylinder 3, a pilot electromagnetic valve 4 and a valve core 5, wherein the main valve body 1 comprises a valve body shell 11, the valve body shell 11 is provided with a first valve body cavity 12 and a second valve body cavity 13 which are connected in communication, the first valve body cavity 12 is connected with a main valve air inlet hole provided on the side of the valve body shell 11, the main valve air inlet hole is used for docking external gas, and in actual work, the flow size of the main valve body 1 can be accurately controlled by controlling the gap between the first valve body cavity 12 and the second valve body cavity 13.

[0022] The air outlet flange 2 is installed on the top of the valve body shell 11, the air outlet flange 2 comprises a flange body 21, the flange body 21 is fixed on the top of the valve body shell 11 through a flange fixing screw 22, the center of the flange body 21 is provided with an air outlet hole 23, the air outlet hole 23 is connected in communication with the top of the second valve body cavity 13. The main valve air inlet hole, the first valve body cavity 12, the second valve body cavity 13 and the air outlet hole 23 constitute the gas path channel of the main valve body 1.

[0023] The cylinder 3 is installed on the left end of the main valve body 1, which includes a cylinder body 31, the right end of which is fixed on the left end side of the valve body shell 11, the cavity provided in the cylinder body 31 communicates with the second valve cavity 13 on the valve body shell 11, and the cavity provided in the cylinder body 31 is provided with a partition plate 38, which separates the cavity provided in the cylinder body 31 into two sections to facilitate the segmented movement of the valve core 5. The left side of the partition plate 38 is provided with a limiting cavity 37, which has two functions, one is to limit the maximum position of the right movement of the valve core 5, and the other is to provide a gas space for the left movement of the valve core 5. The left end side of the cylinder body 31 is closed by a cylinder cover 32, which is fixed on the left end side of the cylinder body 31 by a cylinder cover fixing screw 33. The cylinder cover 32 is provided with a valve core right push air hole 35 and a valve core left push air hole 34, wherein the valve core left push air hole 34 communicates with the limiting cavity 37, and the valve core right push air hole 35 communicates with the left side of the cavity provided in the cylinder body 31. In actual work, when the valve core left push air hole 34 is filled with gas, it can push the valve core 5 to move left, and when the valve core right push air hole 35 is filled with gas, it can push the valve core 5 to move right. The inner side of the cylinder cover 32 is provided with a buffer pad 36 to protect the left end side of the piston body 51.

[0024] The valve core 5 is installed between the cavity provided in the cylinder body 31 and the second valve cavity 13 of the valve body shell 11 after penetrating the partition plate 38 transversely, which includes a piston body 51, which is installed between the cavity provided in the cylinder body 31 and the second valve cavity 13 of the valve body shell 11 after penetrating the partition plate 38 transversely. The right end of the piston body 51 is provided with an end limiting sealing ring 52, and the diameter of the end limiting sealing ring 52 is greater than the diameter of the gas outlet of the first valve cavity 12 in the valve body shell 11. In actual work, when the piston body 51 is pressed to the right, the first valve cavity 12 can be sealed by the end limiting sealing ring 52, so as to realize the disconnection between the first valve cavity 12 and the second valve cavity 13. The sealing ring 39 is installed at the contact between the piston body 51 and the inner side of the cylinder body 31 to improve the sealing performance of the contact between the piston body 51 and the inner side of the cylinder body 31.

[0025] The pilot electromagnetic valve 4 is installed on the left end of the cylinder cover 32, which is a normally open electromagnetic valve, which includes an electromagnetic valve body 41, and the electromagnetic valve body 41 is provided with a valve core right push air hole 42 and a valve core left push air hole 43, which respectively communicate with the valve core right push air hole 35 and the valve core left push air hole 34.

[0026] In actual work, the action of the large flow main valve body 1 can be accurately controlled through the pilot electromagnetic valve 4. The pilot electromagnetic valve 4 is a normally open electromagnetic valve. When the pilot electromagnetic valve 4 is not powered, the valve core right push air hole 42 is opened, the valve core left push air hole 43 is closed, the gas enters the left side of the cylinder body 31 from the valve core right push air hole 42 through the valve core right push air hole 35, pushes the valve core 5 to move right, blocks the first valve body cavity 12 arranged in the valve body shell 11 through the valve core 5, at this time, the first valve body cavity 12 in the valve body shell 11 is disconnected with the second valve body cavity 13, and the main valve body 1 is closed. When the pilot electromagnetic valve 4 is powered, the valve core right push air hole 42 is closed, the valve core left push air hole 43 is opened, the gas enters the limiting cavity 37 arranged in the cylinder body 31 from the valve core left push air hole 43 through the valve core left push air hole 34, pushes the valve core 5 to move left, at this time, the first valve body cavity 12 in the valve body shell 11 is connected with the second valve body cavity 13, the main valve body 1 is opened, the external gas connected with the main valve body 1 can enter the first valve body cavity 12 and the second valve body cavity 13 from the main valve air inlet hole, and finally is delivered outward through the gas outlet hole 23 arranged on the gas outlet flange 2. The distance that the valve core 5 moves left can be accurately controlled through the pilot electromagnetic valve 4, so that the flow size of the main valve body 1 can be accurately controlled.

[0027] The gas pressure superposition valve has reasonable structure design, is convenient to process, has low manufacturing cost, and can greatly improve the control precision of the large flow main valve body 1 through the use of the pilot electromagnetic valve 4 to control the action of the large flow main valve body 1.

[0028] The above is the preferred embodiment of the utility model, but the utility model should not be limited to the content disclosed in the embodiment and the drawings, so that equivalent or modified, which is completed without departing from the spirit disclosed by the utility model, falls within the scope of protection of the utility model.

Claims

1. A pressure superimposition valve characterized by The utility model relates to a kind of air outlet flange, cylinder, pilot solenoid valve and valve core of main valve body, the main valve body includes valve body shell, the first valve body cavity and the second valve body cavity being connected in the valve body shell are provided, the first valve body cavity is connected with the main valve inlet hole being arranged on the side of valve body shell, air outlet flange is installed on the top of valve body shell, the air outlet flange is provided with air outlet hole being connected with the second valve body cavity, cylinder is installed in the left end of main valve body, the cylinder includes cylinder body, the right end of cylinder body is fixed on the left end side of valve body shell, the cavity being arranged in the cylinder body is connected with the second valve body cavity on valve body shell, the cavity being arranged in the cylinder body is installed with baffle, limit cavity is arranged in the left side of baffle, the left end side of cylinder body is closed by cylinder cover, the valve core right push air hole and the valve core left push air hole are arranged on the cylinder cover, wherein the valve core left push air hole is connected with limit cavity, the valve core right push air hole is communicated with the left side of the cavity being arranged in the cylinder body, valve core is installed between the cavity being arranged in the cylinder body and the second valve body cavity of valve body shell after being traversed through baffle, pilot solenoid valve is installed on the left end of cylinder cover, the valve core right push air hole and the valve core left push air hole being connected with the valve core right push air hole and the valve core left push air hole respectively are arranged on the pilot solenoid valve. The valve core includes piston body, the piston body is installed between the cavity being arranged in the cylinder body and the second valve body cavity of valve body shell after being traversed through baffle, the right end of piston body is installed with end limit sealing baffle ring, the diameter of end limit sealing baffle ring is greater than the diameter of air outlet of the first valve body cavity in valve body shell.

2. A pressure override valve as claimed in claim 1, characterised in that: Buffer pad is installed on the inner side of cylinder cover.

3. A pressure override valve as defined in claim 1 wherein: The air outlet flange includes flange body, the flange body is fixed in the top of valve body shell by flange fixed screw, the center of flange body is provided with air outlet hole, and the air outlet hole is connected with the top of the second valve body cavity.

4. A pressure override valve as defined in claim 1 wherein: Sealing ring is installed at the contact between the piston body and the inner side of cylinder body.

5. A pressure override valve as defined in claim 2 wherein: The pilot solenoid valve is normally open solenoid valve.

6. A pressure override valve as defined in claim 2 wherein: ​

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