A pressure relief valve for baby and child care products

Abstract

This invention relates to the field of pressure relief valves, and more particularly to a pressure relief valve for infant and child care products. The valve includes a valve body with a partition plate installed in the middle. An inlet chamber is separated from the lower part of the valve body by the partition plate, and a pressure relief chamber is separated from the upper part of the valve body by the partition plate. An opening is provided in the middle of the partition plate, and a valve core for sealing is provided inside the opening. Connecting flanges are installed at both ends of the valve body. A mounting seat is installed in the middle of the top of the valve body, and a top seat is installed on top of the mounting seat. A cavity is formed inside the wall of the top seat, and connection port one and connection port two are respectively installed on the lower rear sides of the top seat. This invention uses inert gas pressure to drive the valve, replacing the traditional spring and screw-type pressure adjustment structure. This fundamentally avoids the fatigue, permanent deformation, and elastic decay problems caused by long-term use of metal springs, significantly improving the stability and service life of the pressure relief threshold, and eliminating the need for frequent adjustments and maintenance.

Description

Technical Field

[0001] This invention relates to the field of pressure relief valves, and more particularly to a pressure relief valve for baby care products. Background Technology

[0002] Existing pressure relief valves mostly use conventional spring-loaded valves, which rely on metal springs to provide closing force. Long-term operation can lead to metal fatigue, elastic decay, and permanent deformation, resulting in pressure drift and decreased accuracy, requiring frequent adjustments and maintenance. Furthermore, most pressure relief valves lack temperature compensation structures. Additionally, traditional pressure relief valves are mostly fixed pressure settings, unable to flexibly adjust the effective pressure-bearing area according to operating conditions. Adjustment methods are complex and have limited accuracy, making it difficult to meet the multiple requirements of hygiene, stability, and adjustability in the production and transportation of baby care products. Pressure response is easily affected by environmental interference, and in continuous production lines, leakage, delayed pressure relief, or malfunctions can easily occur, impacting production efficiency and system safety. Therefore, we propose a pressure relief valve for baby care products to solve the aforementioned problems. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of the prior art by proposing a pressure relief valve for infant and child care products.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a pressure relief valve for infant and child care products, comprising a valve body, a partition plate installed in the middle of the valve body, an inlet chamber separated by the partition plate on the lower side of the valve body, a pressure relief chamber separated by the partition plate on the upper side of the valve body, an opening in the middle of the partition plate, a valve core for sealing provided inside the opening in the middle of the partition plate, connecting flanges installed at both ends of the valve body, a mounting seat installed in the middle of the top of the valve body, a top seat installed on the top of the mounting seat, a cavity opened inside the wall of the top seat, and connection port one and connection port two respectively installed on the lower rear sides of the top seat, both connection port one and connection port two communicating with the cavity in the wall of the top seat. Both connection port one and connection port two are equipped with check valves. Connection port one is used to connect to a gas storage device. A fixing rod is installed at the center of the top of the valve core. A top plug is fixedly connected to the top of the fixing rod. An inner slip ring is provided on the outer periphery of the top plug. An outer slip ring is provided on the outer periphery of the inner slip ring. The outer peripheral wall of the outer slip ring is slidably connected to the inner side wall of the top seat. An input pipe is installed at the center of the top of the top seat. The input pipe is used to input inert gas into the upper part of the top seat. A pressure regulating valve is installed in the middle of the input pipe. An input port is fixedly connected to the end of the input pipe away from the top seat. The input port is used to connect to a gas transmission device. A circulation pipe is fixedly connected to one side of the input pipe. The end of the circulation pipe away from the input pipe is connected to a connecting... The two interfaces are connected. An installation interface is provided on the upper front side of the top seat for connecting a pressure gauge, which is electrically connected to the gas transmission equipment. Fixed shaft one and fixed shaft two are respectively connected through and rotatably to the upper outer periphery of the top seat. An adjusting handwheel one is fixedly connected to one end of the outer periphery of fixed shaft one. A driving bevel gear one is fixedly connected to the end of the outer periphery of fixed shaft one away from the adjusting handwheel one. A driven bevel gear one is meshed with the lower part of the driving bevel gear one. An installation shaft one is fixedly connected to the middle of the driven bevel gear one. A transmission shaft one is slidably connected to the lower part of the installation shaft one. A rotating shaft one is fixedly connected to the bottom of the transmission shaft one. An adjusting... Gear 1; an adjusting handwheel 2 is fixedly connected to one end of the outer circumference of the fixed shaft 2; a driving bevel gear 2 is fixedly connected to the end of the outer circumference of the fixed shaft 2 away from the adjusting handwheel 2; a driven bevel gear 2 is meshed with the lower part of the driving bevel gear 2; an installation shaft 2 is fixedly connected to the middle part of the driven bevel gear 2; a transmission shaft 2 is slidably connected to the lower part of the installation shaft 2; a rotating shaft 2 is fixedly connected to the bottom of the transmission shaft 2; an adjusting gear 2 is fixedly connected to the lower part of the outer circumference of the rotating shaft 2; a ring tooth groove 1 is opened at the top of the outer slip ring; a rotating ring 2 is rotatably connected to the upper part of the inner side of the ring tooth groove 1; the rotating shaft 1 passes through the rotating ring 2 and is rotatably connected to the rotating ring 2; and the adjusting gear 1 is meshed with the inner side of the ring tooth groove 1.

[0005] Preferably, a sealing plug is installed inside the mounting base, and a fixing rod passes through the middle of the sealing plug. The fixing rod is slidably connected to the sealing plug, and the sealing plug is located below the top plug.

[0006] Preferably, the inner slip ring has a second ring tooth groove at the top, and a first rotating ring is rotatably connected to the upper inner side of the second ring tooth groove. The second rotating shaft passes through the first rotating ring and is rotatably connected to the first rotating ring. The second adjusting gear is meshed with the inner side of the second ring tooth groove.

[0007] Preferably, the inner sidewall of the inner slip ring is provided with L-shaped grooves on both sides, and the upper outer periphery of the top plug is fixedly connected with sliding columns on both sides, and the sliding columns are slidably connected inside the L-shaped grooves.

[0008] Preferably, both sides of the outer sidewall of the inner slip ring are provided with L-shaped grooves, and both sides of the upper part of the inner sidewall of the outer slip ring are fixedly connected with sliding columns. The sliding columns are slidably connected inside the L-shaped grooves. Both L-shaped grooves are formed by connecting an upper vertical groove and a lower horizontal groove. The vertical groove extends from top to bottom, and the horizontal groove extends from the bottom of the vertical groove along the circumferential direction.

[0009] Preferably, the first adjusting handwheel and the second adjusting handwheel are respectively located on both sides of the outer periphery of the top seat, and the first mounting shaft and the second mounting shaft are both mounted on both sides of the inner side of the top seat through mounting plates.

[0010] Compared with the prior art, the present invention has the following beneficial effects: This invention uses inert gas pressure drive to replace the traditional spring and screw-type pressure regulation structure, fundamentally avoiding the fatigue, permanent deformation and elastic decay problems caused by long-term use of metal springs. It significantly improves the stability and service life of the pressure relief threshold, eliminates the need for frequent debugging and maintenance, ensures long-term constant medium conveying pressure, effectively prevents safety hazards such as pipeline overpressure leakage and pipe bursts, and improves the continuity and reliability of equipment operation. The overall sealing structure is compact, the pressure is uniform, and the switching action is sensitive. It can quickly respond to pressure relief when the medium pressure rises instantaneously, ensuring the safe and stable operation of the conveying system. It is suitable for application scenarios with high hygiene requirements and strong operational stability requirements.

[0011] This invention utilizes an inert gas-filled cavity within the top seat to form a highly efficient heat insulation layer. This effectively blocks the influence of external environmental temperature changes on the internal pressurized gas, reducing pressure drift caused by temperature fluctuations and making the pressure relief more stable and reliable. Combined with a pressure stabilizing valve and a pressure gauge that monitors in real time, the internal gas pressure of the top seat can be accurately monitored, enabling automatic pressure feedback and gas replenishment regulation to maintain a constant working pressure over a long period. The circulation pipeline and check valve structure enable stable circulation and replenishment of pressurized gas, further improving pressure control accuracy. The overall structure has good environmental adaptability, maintaining stable pressure relief performance even under conditions of large temperature variations, thus improving the applicability and operational safety of the equipment.

[0012] This invention utilizes a dual-adjustment handwheel, bevel gear transmission, and inner and outer slip rings to achieve flexible switching between the linkage state of the top plug and the slip rings, precisely adjusting the effective pressure-bearing area of ​​the top plug. This allows for accurate setting of multi-level pressure relief. The L-shaped slide groove, with its upper vertical groove and lower horizontal groove structure, ensures reliable locking after adjustment, preventing loosening or displacement during operation. The adjustment operation is simple and intuitive, with accurate positioning, meeting the pressure relief requirements of different working conditions and pressure levels. The adjustment process requires no equipment disassembly and can be quickly completed on-site, improving ease of use and adaptability, and meeting diverse and high-precision pressure control requirements. Attached Figure Description

[0013] Figure 1 This is a frontal perspective three-dimensional structural diagram of a pressure relief valve for infant and child care products according to the present invention; Figure 2 This is a rear-view three-dimensional structural diagram of a pressure relief valve for infant and child care products according to the present invention; Figure 3 This is a schematic diagram of the internal structure of a pressure relief valve for infant and child care products according to the present invention. Figure 4 This is a schematic diagram of the internal structure of the top seat of a pressure relief valve for infant and child care products according to the present invention; Figure 5 This is a partial structural diagram of the mounting shaft one and mounting shaft two of the pressure relief valve for infant and child care products according to the present invention. Figure 6 This is a partial structural diagram of the drive shaft one and drive shaft two of a pressure relief valve for infant and child care products according to the present invention. Figure 7 This is a partial structural diagram of the annular groove one and annular groove two of the pressure relief valve for infant and child care products according to the present invention. Figure 8 This is a partial structural diagram of the outer and inner slip rings of a pressure relief valve for infant and child care products according to the present invention; Figure 9 This is a partial structural diagram of two L-shaped grooves in a pressure relief valve for infant and child care products according to the present invention.

[0014] 101. Valve body; 102. Mounting base; 103. Top seat; 104. Connecting flange; 105. Connection port one; 106. Adjusting handwheel one; 107. Circulation pipe; 108. Inlet port; 109. Inlet pipe; 110. Adjusting handwheel two; 111. Mounting interface; 112. Pressure relief chamber; 113. Connection port two; 114. Inlet chamber; 115. Valve core; 116. Fixing rod; 117. Divider plate; 118. Sealing plug; 119. Top plug; 120. Rotary ring two; 121. Outer slip ring; 122. Mounting shaft two; 123. Mounting shaft one; 124. Driven bevel gear one; 125. Driving bevel gear one; 126. Fixed shaft one; 127. Driven bevel gear two; 128. Fixed shaft two; 129. Driving bevel gear two; 130. Rotating ring one; 131. Transmission shaft one; 132. Rotating shaft one; 133. Rotating shaft two; 134. Transmission shaft two; 135. Ring tooth groove one; 136. Ring tooth groove two; 137. Inner slip ring; 138. Sliding column one; 139. Sliding column two; 140. L-shaped slide groove one; 141. L-shaped slide groove two; 142. Adjusting gear one; 143. Adjusting gear two. Detailed Implementation

[0015] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0016] like Figures 1-9The pressure relief valve for infant and child care products shown includes a valve body 101. A partition plate 117 is installed in the middle of the valve body 101. An inlet chamber 114 is separated from the lower side of the valve body 101 by the partition plate 117, and a pressure relief chamber 112 is separated from the upper side of the valve body 101 by the partition plate 117. An opening is provided in the middle of the partition plate 117, and a valve core 115 for sealing is provided inside the opening in the middle of the partition plate 117. Connecting flanges 104 are installed at both ends of the valve body 101. A mounting seat 102 is installed in the middle of the top of the valve body 101. A top seat 103 is installed on the top of the mounting seat 102. An installation interface 111 is provided on the upper front side of the top seat 103 for connecting a pressure gauge. The pressure gauge is electrically connected to a gas transmission device. A fixing rod 1 is installed in the middle of the top of the valve core 115. 16. A top plug 119 is fixedly connected to the top of the fixed rod 116. An inner slip ring 137 is provided on the outer periphery of the top plug 119. An outer slip ring 121 is provided on the outer periphery of the inner slip ring 137. The outer periphery of the outer slip ring 121 is slidably connected to the inner side wall of the top seat 103. A sealing plug 118 is installed inside the mounting seat 102. The middle of the sealing plug 118 is penetrated by the fixed rod 116. The fixed rod 116 is slidably connected to the sealing plug 118. The sealing plug 118 is located at the lower part of the top plug 119. Fixed shaft 126 and fixed shaft 228 are respectively passed through and rotatably connected on both sides of the upper part of the outer periphery of the top seat 103. Adjusting handwheel 106 and adjusting handwheel 210 are respectively located on both sides of the outer periphery of the top seat 103. Mounting shaft 123 and mounting shaft 222 are both installed on both sides of the inner periphery of the top seat 103 through mounting plates. Furthermore, in practical implementation, the valve body 101 can be connected to the conveying pipeline and the pressure relief pipeline at both ends via connecting bolts and connecting flange 104, respectively, so that the inlet chamber 114 is connected to the conveying pipeline and the pressure relief chamber 112 is connected to the pressure relief pipeline. In practical use, after the pressure relief valve is installed, inert gas can be introduced into the top seat 103 through the inlet pipe 109. The air pressure inside the top seat 103 can suppress the internal top plug 119, so that the valve core 115 can be pressed into the opening on the partition plate 117. The current sealing of the partition plate 117 can prevent leakage of the medium in the conveying pipeline and ensure the normal operation of the conveying work. During this process, when the internal pressure of the conveying pipeline increases and the internal pressure of the inlet chamber 114 exceeds the pressure exerted by the gas inside the top seat 103 on the top plug 119, the medium in the conveying pipeline will push the valve core 115 upward, so that the port on the partition plate 117 can be opened, connecting the inlet chamber 114 and the pressure relief chamber 112, so that the medium in the conveying pipeline will be guided into the pressure relief chamber 112 and discharged through the pressure relief pipeline to achieve the pressure relief operation.

[0017] The top seat 103 has a cavity inside its wall. Connecting ports 105 and 113 are installed on the lower rear sides of the top seat 103, respectively. Both connecting ports 105 and 113 are connected to the cavity inside the top seat 103 wall. Check valves are installed inside both connecting ports 105 and 113. Connecting port 105 is used to connect to a gas storage device. An input pipe 109 is installed at the top center of the top of the top seat 103. The input pipe 109 is used to input inert gas into the upper part of the top seat 103. A pressure stabilizing valve is installed in the middle of the input pipe 109. An input port 108 is fixedly connected to the end of the input pipe 109 away from the top seat 103. The input port 108 is used to connect to a gas transmission device. A circulation pipe 107 is fixedly connected to one side of the input pipe 109. The end of the circulation pipe 107 away from the input pipe 109 is connected to connecting port 113. Furthermore, in specific implementation, the pressure gauge connected to the installation interface 111 can monitor the internal air pressure of the top seat 103, facilitating the judgment of the working status of the top seat 103. At the same time, the pressure stabilizing valve inside the input pipe 109 can stabilize the internal pressure of the top seat 103. In actual use, the cavity inside the top seat 103 and the inert gas inside the cavity can achieve temperature insulation of the internal pressure gas of the top seat 103, avoiding pressure fluctuations due to changes in ambient temperature, which would affect the pressure relief operation. During operation, the pressure gauge can cooperate with the gas transmission equipment, allowing the gas transmission equipment to be activated according to actual needs to replenish the gas inside the top seat 103 and replace the inert gas in the cavity of the top seat 103.

[0018] Among them, an adjusting handwheel 106 is fixedly connected to one end of the outer circumference of the fixed shaft 126; a driving bevel gear 125 is fixedly connected to the end of the outer circumference of the fixed shaft 126 away from the adjusting handwheel 106; a driven bevel gear 124 is meshed with the lower part of the driving bevel gear 125; a mounting shaft 123 is fixedly connected to the middle of the driven bevel gear 124; a transmission shaft 131 is slidably connected to the lower part of the mounting shaft 123; a rotating shaft 132 is fixedly connected to the bottom of the transmission shaft 131; an adjusting gear 142 is fixedly connected to the lower part of the outer circumference of the rotating shaft 132; and the outer slip ring 121 is topped with... The inner sliding ring 137 has an annular groove 135. A rotating ring 120 is rotatably connected to the upper inner side of the annular groove 135. A rotating shaft 132 passes through the rotating ring 120 and is rotatably connected to it. An adjusting gear 142 is meshed with the inner side of the annular groove 135. The outer wall of the inner sliding ring 137 has L-shaped grooves 140 on both sides. The upper sides of the inner wall of the outer sliding ring 121 are fixedly connected to sliding posts 138. The sliding posts 138 are slidably connected inside the L-shaped grooves 140. Both the L-shaped grooves 140 and 141 have a vertical groove at the top and a horizontal groove at the bottom. The horizontal groove is connected, and the vertical groove extends from top to bottom. The horizontal groove extends circumferentially from the bottom of the vertical groove. An adjusting handwheel 110 is fixedly connected to one end of the outer circumference of the fixed shaft 128. A driving bevel gear 129 is fixedly connected to the end of the fixed shaft 128 away from the adjusting handwheel 110. A driven bevel gear 127 is meshed with the lower part of the driving bevel gear 129. A mounting shaft 122 is fixedly connected to the middle of the driven bevel gear 127. A transmission shaft 134 is slidably connected to the lower part of the mounting shaft 122. A rotating shaft 133 is fixedly connected to the bottom of the transmission shaft 134. The lower outer periphery of the rotating shaft 133 is fixedly connected to the adjusting gear 143. The top of the inner slip ring 137 is provided with a ring tooth groove 136. The upper inner side of the ring tooth groove 136 is rotatably connected to the rotating ring 130. The rotating shaft 133 passes through the rotating ring 130 and is rotatably connected to the rotating ring 130. The adjusting gear 143 is meshed and connected to the inner side of the ring tooth groove 136. The inner sidewall of the inner slip ring 137 is provided with L-shaped sliding grooves 141 on both sides. The upper outer periphery of the top plug 119 is fixedly connected to the sliding column 139 on both sides. The sliding column 139 is slidably connected inside the L-shaped sliding groove 141. Furthermore, in specific implementation, high-pressure gas can be introduced into the top seat 103, causing the valve core 115 to drop to its lowest position and the pressure relief valve to be closed. At this time, the top plug 119, inner slip ring 137, and outer slip ring 121 are all at the bottom of the top seat 103 under the action of high-pressure gas. At this time, the adjusting handwheel 110 can be rotated, which can drive the coaxial fixed driving bevel gear 129 to rotate. The driving bevel gear 129 can drive the driven bevel gear 127 meshing at the bottom to rotate synchronously. The driven bevel gear 127 can drive the transmission shaft 134 and the rotating shaft 133 at the bottom to rotate. When 133 rotates, the adjusting gear 143 at the bottom can drive the inner slip ring 137 to rotate synchronously via the ring groove 136, so that the sliding column 139 on the top plug 119 can rotate relative to the L-shaped slide groove 141 inside the "horizontal groove". By adjusting the handwheel 106, the driving bevel gear 125 can be rotated via the fixed shaft 126. The fixed shaft 126 can drive the driven bevel gear 124 meshing with it at the bottom to rotate. When the driven bevel gear 124 rotates, it will drive the transmission shaft 131 and the rotating shaft 132 to rotate synchronously via the mounting shaft 123. The adjusting gear 132 at the bottom of the rotating shaft 132 can also rotate synchronously. The gear 142 can drive the outer slip ring 121 to deflect via the ring tooth groove 135. When the inner slip ring 137 deflects, the sliding pin 139 can switch between the "horizontal groove" and the "vertical groove" on the L-shaped groove 141. When the outer slip ring 121 deflects, the sliding pin 138 can switch between the "horizontal groove" and the "vertical groove" on the L-shaped groove 140. When the sliding pin 139 and the sliding pin 138 are in the "horizontal groove", the inner slip ring 137 and the outer slip ring 121 will cooperate and connect with the top plug 119, so that when the top plug 119 moves up and down, it will drive the inner slip ring 137 and the outer slip ring 121 to move synchronously, forming a linkage. When the sliding pin 139... The sliding column 138 is located in the "vertical groove". The inner slip ring 137 and the outer slip ring 121 slide with the top plug 119 and are in their own independent state. This means that when the top plug 119 moves up and down, it will not drive the inner slip ring 137 and the outer slip ring 121 to move synchronously. By adjusting the rotation of the first handwheel 106 and the second handwheel 110, the linkage state between the top plug 119, the inner slip ring 137 and the outer slip ring 121 can be adjusted. This allows for the adjustment of the pressure-bearing area of ​​the gas on the top surface of the top plug 119, thereby precisely adjusting the pressure relief start pressure. After adjusting to the required state, the high-pressure gas in the top seat 103 is discharged and adjusted to the required gas pressure, thus completing the adjustment work.

[0019] Working principle: In practical use, the valve body 101 can be connected to the conveying pipeline and the pressure relief pipeline at both ends via connecting bolts and connecting flange 104, respectively. This connects the inlet chamber 114 to the conveying pipeline and the pressure relief chamber 112 to the pressure relief pipeline. During specific use, after the pressure relief valve is installed, inert gas can be introduced into the top seat 103 through the inlet pipe 109. The internal air pressure of the top seat 103 can suppress the internal top plug 119, causing the valve core 115 to be pressed into the opening on the partition plate 117, thus sealing the partition plate 117 and preventing leakage of the conveying pipeline, ensuring the normal operation of the conveying work. During this process, when the internal pressure of the conveying pipeline increases and the internal pressure of the inlet chamber 114 exceeds that of the top seat 103, the valve body 101 will be closed. When the internal gas applies pressure to the top plug 119, the medium in the delivery pipeline will push the valve core 115 upward, allowing the opening on the partition plate 117 to open, connecting the inlet chamber 114 and the pressure relief chamber 112. This allows the medium in the delivery pipeline to be guided into the pressure relief chamber 112 and discharged through the pressure relief pipeline, thus achieving pressure relief. In practical use, the pressure gauge connected to the mounting interface 111 can monitor the internal air pressure of the top seat 103, facilitating the judgment of the working status of the top seat 103. At the same time, the pressure stabilizing valve inside the input pipe 109 can stabilize the internal pressure of the top seat 103. In actual use, the internal cavity of the top seat 103 and the inert gas within the cavity can achieve the control of the internal pressure of the gas in the top seat 103. The system is designed for thermal insulation to prevent pressure fluctuations within the top seat 103 due to changes in ambient temperature, which could affect the pressure relief operation. During operation, a pressure gauge can be used in conjunction with a gas delivery system, allowing the system to activate as needed to replenish gas to the top seat 103 and replace the inert gas within its cavity. In practical use, high-pressure gas is first introduced into the top seat 103, lowering the valve core 115 to its lowest position and closing the pressure relief valve. At this point, the top plug 119, inner slip ring 137, and outer slip ring 121 are all positioned at the bottom of the top seat 103 under the pressure of the high-pressure gas. Then, the adjusting handwheel 110 can be rotated, which drives the coaxially fixed drive bevel gear 129. The mechanism involves a drive bevel gear 129 driving a driven bevel gear 127 at the bottom for synchronous rotation. The driven bevel gear 127, in turn, drives the transmission shaft 134 and the rotating shaft 133 at the bottom. When the rotating shaft 133 rotates, the adjusting gear 143 at the bottom drives the inner sliding ring 137 to deflect synchronously via the ring groove 136. This causes the sliding pin 139 on the top plug 119 to deflect relative to the L-shaped groove 141 within its transverse groove. The adjusting handwheel 106 drives the drive bevel gear 125 via the fixed shaft 126, which in turn drives the driven bevel gear 124 at the bottom for rotation.When the driven bevel gear 124 rotates, it drives the transmission shaft 131 and the rotating shaft 132 to rotate synchronously via the mounting shaft 123. The adjusting gear 142 at the bottom of the rotating shaft 132, through the ring groove 135, drives the outer slip ring 121 to deflect. When the inner slip ring 137 deflects, the sliding column 139 can switch between the "horizontal groove" and the "vertical groove" on the L-shaped groove 141. When the outer slip ring 121 deflects, the sliding column 138 can switch between the "horizontal groove" and the "vertical groove" on the L-shaped groove 140. When the sliding column 139 and the sliding column 138 are in the "horizontal groove," the inner slip ring 137 and the outer slip ring 121 will cooperate and connect with the top plug 119, causing the top plug 119 to move up and down, which in turn drives the inner slip ring. The inner slip ring 137 and outer slip ring 121 move synchronously, forming a linkage. When the second sliding column 139 and the first sliding column 138 are in the "vertical groove," the inner slip ring 137 and outer slip ring 121 will slide against the top plug 119, remaining in their independent states. This prevents the inner slip ring 137 and outer slip ring 121 from moving synchronously when the top plug 119 moves up and down. By adjusting the rotation of the first handwheel 106 and the second handwheel 110, the linkage state between the top plug 119, inner slip ring 137, and outer slip ring 121 can be adjusted. This allows for adjustment of the pressure-bearing area of ​​the gas on the top surface of the top plug 119, thereby precisely adjusting the pressure relief start pressure. After adjusting to the required state, the high-pressure gas in the top seat 103 is discharged and adjusted to the required pressure, thus completing the adjustment work.

[0020] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A pressure relief valve for infant and child care products, comprising a valve body (101), characterized in that: A partition plate (117) is installed in the middle of the valve body (101). An inlet chamber (114) is separated from the lower side of the valve body (101) by the partition plate (117). A pressure relief chamber (112) is separated from the upper side of the valve body (101) by the partition plate (117). An opening is provided in the middle of the partition plate (117). A valve core (115) for sealing is provided inside the opening in the middle of the partition plate (117). A connecting flange (104) is installed at both ends of the valve body (101). A mounting seat (102) is installed in the middle of the top of the valve body (101). A top seat (103) is installed on the top of the mounting seat (102). A cavity is opened inside the wall of the top seat (103). The rear of the top seat (103) Connection port one (105) and connection port two (113) are respectively installed on the lower two sides. Both connection port one (105) and connection port two (113) are connected to the cavity in the wall of the top seat (103). Check valves are installed inside both connection port one (105) and connection port two (113). Connection port one (105) is used to connect to the gas storage device. A fixing rod (116) is installed at the middle of the top of the valve core (115). A top plug (119) is fixedly connected to the top of the fixing rod (116). An inner slip ring (137) is provided on the outer periphery of the top plug (119). An outer slip ring (121) is provided on the outer periphery of the inner slip ring (137). The outer peripheral wall of the outer slip ring (121) is slidably connected to the inner wall of the top seat (103). An input pipe (109) is installed at the middle of the top of the top seat (103). The input pipe (109) is used to input inert gas into the upper part of the top seat (103). A pressure regulating valve is installed in the middle of the input pipe (109). An input port (108) is fixedly connected to the end of the input pipe (109) away from the top seat (103). The input port (108) is used to connect to the gas transmission equipment. A circulation pipe (107) is fixedly connected to one side of the input pipe (109). The end of the circulation pipe (107) away from the input pipe (109) is connected to the second connection port (113). An installation interface (111) is provided on the upper front side of the top seat (103). The installation interface (111) is used to connect a pressure gauge. The pressure gauge is connected to the gas transmission equipment. For electrical connection, a fixed shaft one (126) and a fixed shaft two (128) are respectively connected through and rotatably on the upper outer periphery of the top seat (103). An adjusting handwheel one (106) is fixedly connected to one end of the outer periphery of the fixed shaft one (126). A driving bevel gear one (125) is fixedly connected to the end of the outer periphery of the fixed shaft one (126) away from the adjusting handwheel one (106). A driven bevel gear one (124) is meshed with the lower part of the driving bevel gear one (125). An installation shaft one (123) is fixedly connected to the middle part of the driven bevel gear one (124). A transmission shaft one (131) is slidably connected to the lower part of the installation shaft one (123). A rotating shaft one (132) is fixedly connected to the bottom of the transmission shaft one (131).An adjusting gear 1 (142) is fixedly connected to the lower outer periphery of the rotating shaft 1 (132). An adjusting handwheel 2 (110) is fixedly connected to one end of the outer periphery of the fixed shaft 2 (128). A driving bevel gear 2 (129) is fixedly connected to the end of the fixed shaft 2 (128) away from the adjusting handwheel 2 (110). A driven bevel gear 2 (127) is meshed with the lower part of the driving bevel gear 2 (129). An installation shaft 2 (122) is fixedly connected to the middle part of the driven bevel gear 2 (127). A sliding connection is made to the lower part of the installation shaft 2 (122). A second drive shaft (134) is fixedly connected to a second rotating shaft (133) at its bottom. An adjusting gear (143) is fixedly connected to the lower outer periphery of the second rotating shaft (133). A ring tooth groove (135) is provided at the top of the outer slip ring (121). A second rotating ring (120) is rotatably connected to the upper inner side of the first ring tooth groove (135). The first rotating shaft (132) passes through the second rotating ring (120) and is rotatably connected to it. The first adjusting gear (142) meshes with the inner side of the first ring tooth groove (135).

2. The pressure relief valve for infant and child care products according to claim 1, characterized in that: The mounting base (102) is equipped with a sealing plug (118), the middle of which is penetrated by a fixing rod (116). The fixing rod (116) is slidably connected to the sealing plug (118), and the sealing plug (118) is located at the lower part of the top plug (119).

3. A pressure relief valve for infant and child care products according to claim 2, characterized in that: The inner slip ring (137) has a second ring tooth groove (136) at the top. The upper inner side of the second ring tooth groove (136) is rotatably connected to a first rotating ring (130). The second rotating shaft (133) passes through the first rotating ring (130) and is rotatably connected to the first rotating ring (130). The second adjusting gear (143) is meshed with the inner side of the second ring tooth groove (136).

4. A pressure relief valve for infant and child care products according to claim 3, characterized in that: The inner sliding ring (137) has two L-shaped sliding grooves (141) on both sides of its inner sidewall. The top plug (119) has two sliding columns (139) fixedly connected to both sides of its outer upper part. The two sliding columns (139) are slidably connected inside the L-shaped sliding grooves (141).

5. A pressure relief valve for infant and child care products according to claim 4, characterized in that: The inner sliding ring (137) has two L-shaped sliding grooves (140) on both sides of its outer sidewall. The upper side of the inner sidewall of the outer sliding ring (121) is fixedly connected to two sliding columns (138). The sliding columns (138) are slidably connected inside the L-shaped sliding groove (140). The L-shaped sliding groove (140) and the L-shaped sliding groove (141) are both formed by connecting the upper vertical groove and the lower horizontal groove. The vertical groove extends from top to bottom, and the horizontal groove extends from the bottom of the vertical groove along the circumferential direction.

6. A pressure relief valve for infant and child care products according to claim 1, characterized in that: The first adjusting handwheel (106) and the second adjusting handwheel (110) are respectively located on both sides of the outer periphery of the top seat (103), and the first mounting shaft (123) and the second mounting shaft (122) are both installed on both sides of the inner side of the top seat (103) through mounting plates.

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