Sectional type slow closing device of pneumatic valve
By designing a segmented slow-closing device for pneumatic valves, the combination of cam valves and air-controlled valves has been used to solve the problem that existing pneumatic actuators cannot achieve segmented slow-closing, achieving higher adaptability and flexible closing speed.
Patent Information
- Application Number
- CN202420894872.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-26
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2034-04-26
AI Technical Summary
The existing pneumatic actuators' gas circuit regulation method cannot achieve segmented slow-off, resulting in poor adaptability.
A segmented slow-closing device for pneumatic valves is designed. By including supporting seats, rotating rods, opening and closing plates, cam valves, air-controlled valves and speed control valves, the segmented slow-closing control of the actuator is achieved by combining the cam valves and air-controlled valves.
The actuator is segmented slow-off, which improves adaptability and can adjust the actuator's shutdown speed as needed.
Smart Images
Figure CN222577005U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of switch valves, in particular to a segmented slow closing device of a pneumatic valve. Background Art
[0002] At present, many pneumatic actuators use gas circuits to control operation. The speed regulating valve in the gas circuit controls the gas flow by adjusting the opening of the valve, thereby adjusting the gas flow speed (i.e. the actuator operation speed). Since the current gas circuit generally uses a single or double speed regulating valve for regulation, and a single or double speed regulating valve is used to control the gas circuit, it cannot be closed slowly in sections, and the adaptability is relatively poor. Utility Model Content
[0003] In view of the above problems, the utility model provides a segmented slow closing device for a pneumatic valve.
[0004] The technical solution adopted by the utility model is as follows:
[0005] A segmented slow closing device for a pneumatic valve comprises a support, a rotating rod, an opening and closing piece, a cam valve, a first air-controlled valve, a second air-controlled valve, an actuator, a solenoid valve, a first speed regulating valve, a second speed regulating valve, an air source and a filter, wherein the rotating rod is rotatably mounted on the support, the opening and closing piece is arranged on the rotating rod, the cam valve is arranged on the support, an air inlet interface, an air outlet interface and a silencer interface are provided on the cam valve, the opening and closing piece comprises a first arc portion and a second arc portion, the first arc portion is connected to the second arc portion, the center points of the first arc portion and the second arc portion are located at the same point, the radius of the first arc portion is smaller than the radius of the second arc portion, and the contact cam end of the cam valve is used to contact the second arc portion;
[0006] The air signal port of the first air-controlled valve is connected to the filter through a solenoid valve; the air inlet of the first air-controlled valve is connected to the filter, and the air outlet of the first air-controlled valve is connected to the actuator; the exhaust port of the first air-controlled valve is connected to the air inlet of the first speed regulating valve and the air inlet of the second speed regulating valve, the air outlet of the first speed regulating valve is connected to a muffler, the air outlet of the second speed regulating valve is connected to the air inlet of the second air-controlled valve, the air outlet of the second air-controlled valve is connected to a muffler, the signal port of the second air-controlled valve is connected to the air outlet interface of the cam valve, and the air inlet interface of the cam valve is connected to the filter.
[0007] The working process of the above-mentioned device is as follows: first, when and only when the second arc portion on the opening and closing plate contacts the contact cam end of the cam valve, the air inlet interface and the air outlet interface on the cam valve are in a conductive state; when the second arc portion does not contact the contact cam end of the cam valve, the air inlet interface and the air outlet interface on the cam valve are in a non-conductive state.
[0008] In this device, the solenoid valve and the cam valve only play the role of a signal valve. The specific working process is as follows: first, when the solenoid valve is opened, the gas in the gas source enters the signal interface of the first gas-controlled valve through the filter and the solenoid valve. At this time, the first gas-controlled valve is opened, and the gas in the gas source enters the air inlet of the first gas-controlled valve through the filter and then enters the actuator through the air outlet of the first gas-controlled valve, and the actuator is opened. When the solenoid valve is closed, the gas discharged from the actuator enters the first speed regulating valve and the second speed regulating valve through the exhaust port of the first air hole valve. Since the first speed regulating valve is directly connected to the muffler, the gas in the first speed regulating valve can be directly discharged through the muffler, and the air path between the second speed regulating valve and the muffler is controlled by the second gas-controlled valve.
[0009] The opening and closing of the second air-controlled valve is controlled by the cam valve. When gas flows into the signal interface of the second air-controlled valve from the outlet interface of the cam valve, the second air-controlled valve opens, and the gas in the second speed regulating valve can flow into the muffler through the second air-controlled valve. Therefore, in this device, the opening and closing of the second air-controlled valve is determined by the opening and closing of the cam valve, and the opening and closing of the second air-controlled valve can ensure the opening and closing of the passage of the second speed regulating valve. The opening and closing of the second speed regulating valve is equivalent to the first speed regulating valve and the second speed regulating valve operating at the same time for a period of time, and only the first speed regulating valve operates alone for a period of time (realizing the actuator to close at speed A), and the first speed regulating valve and the second speed regulating valve operate at the same time (at this time, the first speed regulating valve and the second speed regulating valve are in parallel, and the outflowing gas is equal to the sum of the gas flowing through the first speed regulating valve and the second speed regulating valve) can realize the actuator to close at a speed of 2A, so this device can realize the segmented slow closing of the actuator.
[0010] Specifically, the function of the silencer interface in this device is to connect the silencer, and the silencer and the silencer are the same type of instruments.
[0011] Optionally, the opening and closing piece further includes a spacing portion, and the spacing portion is located between the first circular arc portion and the second circular arc portion.
[0012] The contact cam end of the specific cam valve only contacts the second arc portion, and does not contact the first arc portion and the spacing portion.
[0013] Optionally, a bracket is further included, wherein the bracket is arranged on a support, and the valve body is arranged on the bracket.
[0014] Optionally, the bracket is a U-shaped bracket.
[0015] Optionally, a docking shaft is further included, and a clamping hole is provided on the rotating rod, and the docking shaft cooperates with the clamping hole.
[0016] Optionally, the docking axis is perpendicular to the opening and closing piece.
[0017] Optionally, the contact cam end is a semi-spherical contact cam end.
[0018] Optionally, the arc angle of the first arc portion is 240 degrees, and the arc angle of the second arc portion is 67.5 degrees.
[0019] The beneficial effect of the utility model is that the segmented slow closing of the actuator can be realized. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 This is a schematic diagram of the gas circuit of the segmented slow closing device of the pneumatic valve.
[0021] Figure 2 This is a schematic diagram showing the installation position of the cam valve;
[0022] Figure 3 Schematic diagram of the position relationship of the rotating rod on the support;
[0023] Figure 4 It is a schematic diagram of the structure of the opening and closing piece;
[0024] Figure 5 It is a schematic diagram of the matching relationship between the opening and closing piece and the docking shaft;
[0025] Figure 6 These are the two states when the opening and closing plates control the cam valve.
[0026] The reference numerals in the figure are: 1. support; 2. rotating rod; 201. clamping hole; 3. opening and closing piece; 301. first arc portion; 302. second arc portion; 303. spacer portion; 4. cam valve; 401. air inlet interface; 402. silencer interface; 403. contact cam end; 6. bracket; 7. docking shaft; 8. air source; 9. filter; 10. solenoid valve; 11. actuator; 1201. first air-controlled valve; 1202. second air-controlled valve; 1301. first speed regulating valve; 1302. second speed regulating valve; 14. muffler. DETAILED DESCRIPTION
[0027] The utility model is described in detail below in conjunction with the accompanying drawings.
[0028] As attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 , Attachment Figure 4 And attached Figure 5As shown, a segmented slow closing device of a pneumatic valve comprises a support 1, a rotating rod 2, an opening and closing piece 3, a cam valve 4, a first air-controlled valve 1201, a second air-controlled valve 1202, an actuator 11, a solenoid valve 10, a first speed regulating valve 1301, a second speed regulating valve 1302, an air source 8 and a filter 9. The rotating rod 2 is rotatably mounted on the support 1, the opening and closing piece 3 is arranged on the rotating rod 2, the cam valve 4 is arranged on the support 1, and an air inlet interface 401 and an air outlet interface (located on the other side, attached) are provided on the cam valve 4. Figure 1 The opening and closing piece 3 includes a first arc portion 301 and a second arc portion 302, the first arc portion 301 is connected to the second arc portion 302, the center points of the first arc portion 301 and the second arc portion 302 are located at the same point, the radius of the first arc portion 301 is smaller than the radius of the second arc portion 302, and the contact cam end 403 of the cam valve 4 is used to contact the second arc portion 302;
[0029] The air signal port of the first air-controlled valve 1201 is connected to the filter 9 through the solenoid valve 10; the air inlet of the first air-controlled valve 1201 is connected to the filter 9, and the air outlet of the first air-controlled valve 1201 is connected to the actuator 11; the exhaust port of the first air-controlled valve 1201 is connected to the air inlet of the first speed regulating valve 1301 and the air inlet of the second speed regulating valve 1302, the air outlet of the first speed regulating valve 1301 is connected to the muffler 14, the air outlet of the second speed regulating valve 1302 is connected to the air inlet of the second air-controlled valve 1202, the air outlet of the second air-controlled valve 1202 is connected to the muffler 14, the signal port of the second air-controlled valve 1202 is connected to the air outlet interface of the cam valve 4, and the air inlet interface 401 of the cam valve 4 is connected to the filter 9.
[0030] The working process of the above-mentioned device is as follows: first, when and only when the second arc portion 302 on the opening and closing piece 3 contacts the contact cam end 403 of the cam valve 4, the air inlet interface 401 and the air outlet interface on the cam valve 4 are in a conductive state; when the second arc portion 302 does not contact the contact cam end 403 of the cam valve 4, the air inlet interface 401 and the air outlet interface on the cam valve 4 are in a non-conductive state.
[0031] In this device, the solenoid valve 10 and the cam valve 4 only act as a signal valve, and the specific working process is as follows: first, when the solenoid valve 10 is opened, the gas in the air source 8 enters the signal interface of the first air-controlled valve 1201 through the filter 9 and the solenoid valve 10. At this time, the first air-controlled valve 1201 is opened, and the gas in the air source 8 enters the air inlet of the first air-controlled valve 1201 through the filter 9 and then enters the actuator 11 through the air outlet of the first air-controlled valve 1201, and the actuator 11 is opened.
[0032] The opening and closing of the second air-controlled valve 1202 is controlled by the cam valve 4. When gas flows into the signal interface of the second air-controlled valve 1202 from the air outlet interface of the cam valve 4, the second air-controlled valve 1202 is opened, and the gas in the second speed regulating valve 1302 can flow into the muffler 14 via the second air-controlled valve 1202. Therefore, in this device, the opening and closing of the second air-controlled valve 1202 can be controlled by the opening and closing of the cam valve 4, and the opening and closing of the second air-controlled valve 1202 can ensure the passage of the second speed regulating valve 1302. The passage of the second speed regulating valve 1302 is equivalent to the first speed regulating valve 1301 and the second speed regulating valve 1302 running at the same time for a period of time (closing at a speed of 2A), and only the first speed regulating valve 1301 runs alone for a period of time (the actuator closes at a speed of A), so this device can realize the segmented slow closing of the actuator 11.
[0033] The angle of the opening and closing piece can be determined by the arc of 302. For example, this solution uses 67.5°, that is, during the 75% time period of the closing stroke, the contact cam end 403 of the cam valve contacts the opening and closing piece 302, the cam valve 4 and the second air control valve 1202 work normally, and the first speed regulating valve 1301 and the second speed regulating valve 1302 both work normally (the state of the cam valve at this time can be seen in the attached figure). Figure 6 The gas inside the actuator is discharged at a speed of 2A. During the last 25% of the closing stroke, the contact cam end 403 of the cam valve has no contact with the opening and closing piece 302. The cam valve 4 and the second air control valve 1202 do not work. The gas path where the second speed regulating valve 1302 is located is blocked. The gas path where the first speed regulating valve 1301 is located is open (the state of the cam valve at this time is shown in the attached figure). Figure 6 The gas inside the actuator is discharged at speed A, i.e., a staged slow closing. Figure 6 The circular rotation arrow on the left side represents the rotation direction of the opening and closing piece.
[0034] Specifically, the function of the silencer interface 402 in the present device is to connect a silencer, and the silencer and the silencer 14 are the same type of instruments.
[0035] As attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 , Attachment Figure 4 And attached Figure 5 As shown, the opening and closing piece 3 further includes a spacer 303 , and the spacer 303 is located between the first arc portion 301 and the second arc portion 302 .
[0036] Specifically, the contact cam end 403 of the cam valve 4 only contacts the second arc portion 302 , and does not contact the first arc portion 301 and the spacing portion 303 .
[0037] As attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 , Attachment Figure 4 And attached Figure 5 As shown, it also includes a bracket 6, which is arranged on the support 1, and the valve body is arranged on the bracket 6.
[0038] As attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 , Attachment Figure 4 And attached Figure 5 As shown, the bracket 6 is a U-shaped bracket 6.
[0039] As attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 , Attachment Figure 4 And attached Figure 5 As shown, it also includes a docking shaft 7, and a clamping hole 201 is provided on the rotating rod 2, and the docking shaft 7 and the clamping hole 201 are matched together.
[0040] As attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 , Attachment Figure 4 And attached Figure 5 As shown, the docking axis 7 is perpendicular to the opening and closing piece 3.
[0041] As attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 , Attachment Figure 4 And attached Figure 5 As shown, the contact cam end is a semi-spherical contact cam end.
[0042] As attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 , Attachment Figure 4 And attached Figure 5 As shown, the arc angle of the first arc portion 301 is 240 degrees, and the arc angle of the second arc portion 302 is 67.5 degrees.
[0043] The above description is only a preferred embodiment of the present invention, and does not limit the patent protection scope of the present invention. Any equivalent transformations made using the contents of the present invention specification, directly or indirectly used in other related technical fields, are also included in the protection scope of the present invention.
Claims
1. A segmented slow closing device for a pneumatic valve, characterized in that: It includes a support, a rotating rod, an opening and closing piece, a cam valve, a first air-controlled valve, a second air-controlled valve, an actuator, a solenoid valve, a first speed regulating valve, a second speed regulating valve, an air source and a filter, wherein the rotating rod is rotatably mounted on the support, the opening and closing piece is arranged on the rotating rod, the cam valve is arranged on the support, an air inlet interface, an air outlet interface and a silencer interface are provided on the cam valve, the opening and closing piece includes a first arc portion and a second arc portion, the first arc portion is connected to the second arc portion, the center points of the first arc portion and the second arc portion are located at the same point, the radius of the first arc portion is smaller than the radius of the second arc portion, and the contact cam end of the cam valve is used to contact the second arc portion; The air signal port of the first air-controlled valve is connected to the filter through a solenoid valve; the air inlet of the first air-controlled valve is connected to the filter, and the air outlet of the first air-controlled valve is connected to the actuator; the exhaust port of the first air-controlled valve is connected to the air inlet of the first speed regulating valve and the air inlet of the second speed regulating valve, the air outlet of the first speed regulating valve is connected to a muffler, the air outlet of the second speed regulating valve is connected to the air inlet of the second air-controlled valve, the air outlet of the second air-controlled valve is connected to a muffler, the signal port of the second air-controlled valve is connected to the air outlet interface of the cam valve, and the air inlet interface of the cam valve is connected to the filter.
2. The segmented slow closing device for a pneumatic valve according to claim 1, characterized in that: The opening and closing piece further includes a spacing portion, and the spacing portion is located between the first arc portion and the second arc portion.
3. The segmented slow closing device for a pneumatic valve according to claim 1, characterized in that: It also includes a bracket, which is arranged on the support.
4. The segmented slow closing device for a pneumatic valve as claimed in claim 3, characterized in that: The bracket is a U-shaped bracket.
5. The segmented slow closing device for a pneumatic valve according to claim 1, characterized in that: It also includes a docking shaft, a clamping hole is provided on the rotating rod, and the docking shaft is matched with the clamping hole.
6. The segmented slow closing device for a pneumatic valve according to claim 5, characterized in that: The docking axis is perpendicular to the opening and closing piece.
7. The segmented slow closing device for a pneumatic valve according to claim 1, characterized in that: The contact cam end is a semi-spherical contact cam end.
8. The segmented slow closing device for a pneumatic valve according to claim 1, characterized in that: The arc angle of the first arc portion is 240 degrees, and the arc angle of the second arc portion is 67.5 degrees.