Flow overflowing automatic reset device
By designing a flow overcurrent automatic reset device, the elastic difference between the return spring and the overcurrent spring is used to realize automatic reset of the safety valve when the flow rate returns to normal, solving the problem of external interference reset in the prior art, and improving the automation and reliability of the safety valve.
Patent Information
- Application Number
- CN202422075265.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-26
- Publication Date
- 2025-09-02
- Estimated Expiration
- 2034-08-26
AI Technical Summary
The overflow device of the existing safety valve needs external interference to reset after the flow rate returns to normal or the pipeline is replaced, and automatic reset cannot be achieved, which poses safety hazards.
A flow overcurrent automatic reset device is designed to utilize the different elastic differences between the return spring and the overcurrent spring to realize the automatic reset of the overcurrent valve core when the flow rate returns to normal, and is installed on the reset seat through multiple return valve core rings to ensure uniform force.
It realizes automatic reset after the gas flow returns to normal, eliminates the safety hazards of gas leakage, and improves the automation and reliability of the safety valve.
Smart Images
Figure CN223294327U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of safety valves, and in particular relates to an automatic over-flow reset device. Background Art
[0002] In the field of gas safety, such as fuel gas and toxic gas, when safety valves (such as timing valves, solenoid valves, and electric valves) use overflow devices as accessories, overflow devices play a vital role. When the flow rate increases to the maximum overflow design value, or when the outlet pipe falls off, causing underpressure, or when the pipeline pressure is too high, the overflow device will automatically close the valve to ensure that there are no safety hazards caused by overflow, underpressure, or overpressure. However, once the overflow device cuts off the gas, even if the flow rate returns to normal or the pipeline is replaced, external intervention and the reset structure are usually required to manually reset the overflow device and restore the safety valve to normal operation. Utility Model Content
[0003] The utility model aims to provide an automatic over-flow resetting device, so as to realize automatic resetting of the over-flow device after the gas flow returns to normal.
[0004] A flow overflow automatic reset device in the present scheme includes an overflow valve core, a reset valve core and a fixed seat provided with an air inlet channel, the air inlet channel is fixedly connected with a filter seat and a reset seat provided with a through hole in sequence; a sealing ring is provided at one end of the reset seat facing the filter seat, the two ends of the overflow valve core are respectively slidably connected to the filter seat and the reset seat, the overflow valve core is provided with an air outlet channel for gas to pass through, the overflow valve core is connected to an overflow spring, and one end of the overflow spring abuts against the reset seat; one end of the reset valve core is slidably connected to the reset seat, the other end of the reset valve core abuts against the overflow valve core and is located at the air outlet channel, the reset valve core is provided with a reset spring, one end of the reset spring abuts against the reset seat, and the elastic force of the reset spring is smaller than that of the overflow spring.
[0005] The working principle and benefits of this solution are as follows: During use, the flow overflow automatic reset device is installed at the inlet of the safety valve, with the end with the filter seat mounted at the inlet of the safety valve (such as a timing valve, electric valve, or solenoid valve). Because the force of the reset spring is smaller than that of the overflow spring, when gas flows from the device into the safety valve inlet, if the flow rate increases, the pressure generated approaches the force of the reset spring, causing the reset valve core to move toward the reset seat. As the flow rate continues to increase, the pressure generated becomes greater than the force of the overflow spring, causing the overflow valve core to move toward the reset seat until the overflow valve core contacts the sealing ring, completing the overcurrent protection and shutting off the gas flow. Because the force of the reset spring is smaller than that of the overflow spring, the reset valve core is fully depressed before the overflow valve core contacts the sealing ring. When the flow rate gradually decreases and returns to normal, the overflow valve core is simultaneously acted upon by the overflow spring and the reset spring, generating sufficient force to overcome the attraction between the overflow valve core and the sealing ring, completing the automatic reset.
[0006] In addition, when underpressure occurs, the pressure at the outlet decreases or disappears, while there is still pressure at the inlet. At this time, the device cannot complete automatic reset, thereby better eliminating the safety hazards caused by gas leakage.
[0007] Furthermore, the reset valve cores are provided in plurality and the plurality of reset valve cores are arranged in a circle on the reset seat. By providing the plurality of reset valve cores and arranging them in a circle on the reset seat, the force exerted by the reset valve core on the filter valve core is made more uniform.
[0008] Furthermore, the reset seat includes a connecting pipe and a fixing ring fixedly connected to the connecting pipe, the fixing ring and the connecting pipe are coaxial, one end of the connecting pipe away from the filter seat is fixedly connected to the fixing seat, and the reset valve core is slidably connected to the fixing ring.
[0009] Furthermore, the retaining ring is equipped with a number of guide tubes equal to the number of reset valve cores. These guide tubes extend in the same direction as the connecting tubes and penetrate the retaining ring. The reset valve core is slidably connected within the guide tubes, and the reset spring abuts against the end of the guide tube facing the filter seat. The provision of the guide tubes ensures effective guidance of the reset valve core while reducing the thickness of the retaining ring and lowering production costs.
[0010] Furthermore, the connection between the connecting pipe and the fixing ring is provided with reinforcing ribs, which help to increase the service life of the fixing ring.
[0011] Furthermore, the end of the connecting pipe away from the filter seat is provided with a necking, a sealing gasket is sleeved on the necking, and the fixing seat is provided with a placement groove for use with the sealing gasket. The provision of the sealing gasket and the placement groove helps to better ensure the sealing of the connection between the reset seat and the fixing seat.
[0012] Furthermore, a fixing groove for accommodating the sealing ring is provided on the inner wall of the end of the connecting tube near the filter seat, and the sealing ring extends outside the fixing groove. The fixing groove can better secure the sealing ring, and the sealing ring extends outside the fixing groove, thereby improving the airtightness when the overflow valve core contacts the sealing ring, ensuring the effective gas shutoff.
[0013] Furthermore, the overflow valve core includes a connecting rod and a baffle fixedly connected to the connecting rod, the air outlet channel is arranged on the baffle, and the air outlet channel is an air outlet hole or a notch; a fixed block is fixedly connected to the connecting pipe, and a gap for gas to pass is left between the fixed block and the inner wall of the connecting pipe, and the two ends of the connecting rod are respectively slidably connected to the fixed block and the filter seat, and the overflow spring is sleeved on the connecting rod, and the overflow spring is located between the baffle and the fixed block.
[0014] Furthermore, the gas outlet passage is a plurality of notches, and the plurality of notches are evenly distributed at the outer edge of the baffle. The provision of the notches helps the gas to directly act on the reset valve core through the notches.
[0015] Furthermore, the reset valve core includes a guide rod and a supporting plate fixedly connected to one end of the guide rod, and the end of the guide rod away from the supporting plate is slidably connected to the corresponding guide tube. The reset spring is sleeved on the guide rod, and the reset spring is located between the supporting plate and the guide tube. The supporting plate is supported at the notch of the baffle. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a three-dimensional diagram of an automatic over-current reset device according to an embodiment of the present utility model;
[0017] Figure 2 for Figure 1 Exploded view of the medium flow over-current automatic reset device;
[0018] Figure 3 for Figure 1 Longitudinal cross-sectional view. DETAILED DESCRIPTION
[0019] The following is further described in detail through specific implementation methods:
[0020] The figure marks in the drawings of the specification include: filter seat 1, overflow valve core 2, baffle 21, notch 22, overflow spring 3, sealing ring 4, reset valve core 5, holding plate 51, guide rod 52, reset spring 6, reset seat 7, connecting pipe 71, guide pipe 72, fixing ring 73, sealing gasket 8, and fixing seat 9.
[0021] The embodiment is basically as shown in the attached Figures 1 to 3As shown: a flow overflow automatic reset device, including a fixed seat 9, a reset seat 7, a filter seat 1, an overflow valve core 2, a reset valve core 5, a sealing ring 4, a sealing gasket 8, an overflow spring 3 and three reset springs 6, the fixed seat 9 is cylindrical, and both ends of the fixed seat 9 are provided with chamfers; one end of the fixed seat 9 is provided with an air intake channel with a circular cross-section, and the other end of the fixed seat 9 is provided with a mounting hole, the aperture of the mounting hole is smaller than the aperture of the air intake channel, the air intake channel is connected to the mounting hole, and the mounting hole, the air intake channel and the fixed seat 9 are coaxial; a placement groove is provided on the fixed seat 9, and the placement groove is located at the connection between the air intake channel and the mounting hole.
[0022] The filter seat 1 is cylindrical, with one end of the filter seat 1 open, and the open end of the filter seat 1 is chamfered for easy installation; the other end of the filter seat 1 is evenly distributed with filter holes, and a fixing column is provided at the center of the bottom of the filter seat 1, and a guide hole is provided at the center of the fixing column; the filter seat 1 is installed in the air inlet channel of the fixing seat 9 by a tight fit, and the filter seat 1 is located at the end of the air inlet channel away from the mounting hole, and the open end of the filter seat 1 faces the mounting hole.
[0023] The reset seat 7 includes a connecting tube 71 and a fixing ring 73 integrally formed on the connecting tube 71. The fixing ring 73 is coaxial with the connecting tube 71. Three guide tubes 72 are evenly distributed on the fixing ring 73. The guide tubes 72 extend in the same direction as the connecting tube 71 and pass through the fixing ring 73. Three reinforcing ribs are evenly distributed at the connection between the connecting tube 71 and the fixing ring 73. A cross-shaped fixing block is fixedly connected to the connecting tube 71, and a connecting hole is provided at the center of the fixing block. One end of the connecting tube 71 is provided with a shrinkage, and the inner wall of the other end of the connecting tube 71 is provided with a fixing groove. The sealing ring 4 is fixed in the fixing groove by gluing, and the sealing ring 4 extends out of the fixing groove. The sealing gasket 8 is sleeved on the shrinkage of the connecting tube 71, and the sealing gasket 8 is fixed in the placement groove by a tight fit. The shrinkage of the connecting tube 71 is fixed in the mounting hole of the fixing seat 9 by a tight fit.
[0024] The overflow valve core 2 includes a connecting rod and a baffle 21 fixedly connected to the connecting rod. The baffle 21 is circular, and the diameter of the baffle 21 is smaller than the aperture of the open end of the filter seat 1; the outer edge of the baffle 21 is evenly distributed with notches 22, and the notches 22 are used for gas to pass through. The two ends of the connecting rod slide in the guide hole of the fixed column and the connecting hole of the fixed block respectively. The overflow spring 3 is mounted on the connecting rod, and the overflow spring 3 passes through the sealing ring 4. The overflow spring 3 is located between the baffle 21 and the fixed block.
[0025] There are three reset valve cores 5, and the reset valve core 5 includes a guide rod 52 and a supporting plate 51 integrally formed at one end of the guide rod 52. The supporting plate 51 is circular, and the end of the guide rod 52 away from the supporting plate 51 is slidably connected to the corresponding guide tube 72. Three reset springs 6 are respectively sleeved on the three guide rods 52. The reset spring 6 is located between the supporting plate 51 and the guide tube 72. The supporting plate 51 is supported at the notch 22 of the baffle 21; the sum of the elastic forces of the three reset springs 6 is less than that of the overflow spring 3.
[0026] The specific implementation process is as follows: During use, the end of the fixing seat 9 equipped with the filter seat 1 is installed at the inlet of a safety valve (such as a timing valve, electric valve, or solenoid valve). Because the elastic force of the return spring 6 is smaller than the elastic force of the overflow spring 3, when gas flows from the device into the safety valve inlet, if the flow rate increases, the pressure generated approaches the elastic force of the return spring 6, causing the return valve core 5 to move toward the return seat 7. As the flow rate continues to increase, the pressure generated becomes greater than the elastic force of the overflow spring 3, causing the overflow valve core 2 to also move toward the return seat 7 until the overflow valve core 2 and the sealing ring 4 are in close contact, completing the overcurrent protection and shutting off the gas. Because the elastic force of the return spring 6 is smaller than the overflow spring 3, the return valve core 5 is fully pressed in before the overflow valve core 2 and the sealing ring 4 contact. When the flow rate gradually decreases and returns to normal, the overflow valve core 2, acting simultaneously with the overflow spring 3 and the return spring 6, generates sufficient elastic force to overcome the attraction between the overflow valve core 2 and the sealing ring 4, completing the automatic reset.
[0027] In addition, when underpressure occurs, the pressure at the outlet decreases or disappears, while there is still pressure at the inlet. At this time, the device cannot complete automatic reset, thereby better eliminating the safety hazards caused by gas leakage.
[0028] The above is only an embodiment of the present invention, and the commonly known specific structures and characteristics of the scheme are not described in detail here. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, and these should also be regarded as the scope of protection of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection claimed by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.
Claims
1. A flow over-current automatic reset device, characterized by: It includes an excess flow valve core, a reset valve core and a fixed seat provided with an air inlet channel, the air inlet channel is fixedly connected with a filter seat and a reset seat provided with a through hole in sequence; a sealing ring is provided at one end of the reset seat facing the filter seat, two ends of the excess flow valve core are respectively slidably connected to the filter seat and the reset seat, an excess flow valve core is provided with an air outlet channel for gas to pass, an excess flow valve core is connected to an excess flow spring, one end of the excess flow spring abuts against the reset seat; one end of the reset valve core is slidably connected to the reset seat, the other end of the reset valve core abuts against the excess flow valve core and is located at the air outlet channel, a reset spring is provided on the reset valve core, one end of the reset spring abuts against the reset seat, and the elastic force of the reset spring is smaller than that of the excess flow spring.
2. The automatic reset device for over-current according to claim 1, characterized in that: There are multiple reset valve cores, and the multiple reset valve cores are arranged in a ring on the reset seat.
3. The automatic reset device for over-current according to claim 2, characterized in that: The reset seat includes a connecting pipe and a fixing ring fixedly connected to the connecting pipe. The fixing ring is coaxial with the connecting pipe. One end of the connecting pipe away from the filter seat is fixedly connected to the fixing seat. The reset valve core is slidably connected to the fixing ring.
4. The automatic reset device for over-current according to claim 3, characterized in that: The fixing ring is provided with a number of guide tubes equal to the reset valve core, the guide tubes and the connecting tube extend in the same direction, the guide tubes pass through the fixing ring, the reset valve core is slidably connected in the guide tubes, and the reset spring is supported on one end of the guide tube facing the filter seat.
5. The automatic reset device for over-current according to claim 4, characterized in that: The connection between the connecting pipe and the fixing ring is provided with reinforcing ribs.
6. The automatic over-current reset device according to any one of claims 3 to 5, characterized in that: The end of the connecting pipe away from the filter seat is provided with a necking, a sealing gasket is sleeved at the necking, and the fixing seat is provided with a placement groove used in conjunction with the sealing gasket.
7. The automatic reset device for over-current according to claim 6, characterized in that: A fixing groove for accommodating the sealing ring is provided on the inner wall of one end of the connecting pipe close to the filter seat, and the sealing ring extends out of the fixing groove.
8. The automatic reset device for over-current according to claim 7, characterized in that: The overflow valve core includes a connecting rod and a baffle fixedly connected to the connecting rod, the air outlet channel is arranged on the baffle, and the air outlet channel is an air outlet hole or a notch; a fixed block is fixedly connected to the connecting pipe, and a gap for gas to pass is left between the fixed block and the inner wall of the connecting pipe, and the two ends of the connecting rod are respectively slidably connected to the fixed block and the filter seat, and the overflow spring is sleeved on the connecting rod, and the overflow spring is located between the baffle and the fixed block.
9. The automatic reset device for over-current according to claim 8, characterized in that: The air outlet passage is a plurality of notches, and the plurality of notches are evenly distributed at the outer edge of the baffle.
10. The automatic over-current reset device according to claim 9, characterized in that: The reset valve core includes a guide rod and a supporting plate fixedly connected to one end of the guide rod. The end of the guide rod away from the supporting plate is slidably connected in the corresponding guide tube. The reset spring is sleeved on the guide rod. The reset spring is located between the supporting plate and the guide tube. The supporting plate is supported at the notch of the baffle.