Gas pressure regulating structure

Abstract

This utility model discloses a gas pressure regulating structure, relating to the field of gas pressure regulation technology. The utility model includes a regulating mechanism for controlling the gas intake volume and flow rate. The regulating mechanism includes a cylinder and a worm gear housing. The cylinder is hollow inside, and a housing is fitted onto its outer wall. Square boxes are installed at the center of both the front and back of the housing. This utility model uses an installation assembly: pressing a button downwards causes a cam at its bottom to rotate. When the cam rotates, it causes a hook to deflect, pulling the hook out of the rectangular hole of the insert rod. Then, moving the square cover upwards pulls out the insert rod. This allows for control of the rotation of the cam and hook via a button. When the lock is released, pulling the square cover upwards removes the cylinder. The disassembly process is relatively simple, ensuring efficient maintenance of the pressure regulator.

Description

Technical Field

[0001] This utility model belongs to the field of gas pressure regulation technology, and in particular relates to a gas pressure regulation structure. Background Technology

[0002] Gas pressure regulation refers to the process of controlling and adjusting gas pressure in a gas system through pressure regulators (such as pressure reducing valves). Regulators use mechanical structures such as springs, diaphragms, or pistons to balance high input pressure and low output pressure, avoiding negative impacts of gas pressure fluctuations on equipment or processes. Furthermore, by setting up gas pressure regulators, the risk of gas leakage or explosion can be reduced. They are widely used in fields that require the use of gas, such as industrial welding, medical oxygen supply, and gas supply.

[0003] Existing gas pressure regulation typically uses pressure regulators, which are bolted to the equipment. After prolonged use, the internal parts of these regulators age and require maintenance. However, disassembly requires special tools and is a complicated process, affecting the efficiency of maintenance. Therefore, we propose a gas pressure regulation structure. Utility Model Content

[0004] The purpose of this utility model is to provide a gas pressure regulating structure. By setting up an installation component, specifically, pressing down on a button causes a cam at its bottom to rotate. When the cam rotates, it causes a hook to deflect, pulling the hook out of the rectangular hole in the insert rod. Then, moving the square cover upwards pulls out the insert rod. This allows control of the rotation of the cam and hook via a button, thereby controlling the locking and unlocking of the square box and cover. When unlocked, pulling the square cover upwards removes the cylinder. The disassembly process is relatively simple, ensuring efficient maintenance of the pressure regulator. This solves the problem that existing gas pressure regulation typically uses pressure regulators, which are bolted to the equipment. After prolonged use, the internal parts of these regulators age and require maintenance, but disassembly requires special tools, making the process cumbersome and affecting the efficiency of pressure regulator maintenance.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model is a gas pressure regulating structure, including a regulating mechanism. The regulating mechanism is used to control the gas intake volume and the gas intake flow rate. The regulating mechanism includes a cylinder and a worm gear housing.

[0007] The cylinder is hollow inside, and an outer shell is fitted on the outer wall of the cylinder. A square box is installed at the center of the front and back of the outer shell, and a square cover is provided on the top of the two square boxes.

[0008] The worm gear housing is installed at the top center of the cylinder, and a worm gear is rotatably connected to the center inside the worm gear housing. A worm is meshed with the front of the worm gear.

[0009] The bottom outer walls of the two square covers, which are close to each other, are installed on the outer wall of the cylinder, and the two square boxes are arranged in a horizontal mirror image with the cylinder as the center.

[0010] Furthermore, the regulating mechanism includes a mounting assembly for mounting the regulating structure near the equipment where air pressure needs to be controlled;

[0011] An adjustment component, wherein the adjustment component is disposed at the top of the adjustment component, and the adjustment component is used to control the distance of the internal gap of the adjustment structure;

[0012] The top of the mounting component abuts against the bottom of the adjusting component.

[0013] Furthermore, the mounting assembly includes a cam, which is rotatably connected to the inner wall at the center of the square box. A rod is provided on the right side of the cam, the top of the rod penetrates the square box and extends upward. The outer wall of the cam is slidably connected to the part of the square box that is penetrated. The top outer wall of the rod is installed at the center of the bottom outer wall of the square cover. A slot is provided at the center of the rod.

[0014] The slot of the insertion rod is rectangular, and a hook is inserted inside the insertion rod.

[0015] Furthermore, the bottom left side of the hook is mounted on the top right outer wall of the cam, and a button is provided on the top left side of the cam. The top of the button extends upward through the square box and is slidably connected. The bottom outer wall of the button abuts against the top left outer wall of the cam. Slide rods are provided on the bottom left side of the cam and the bottom of the insertion rod. By setting the hook and the insertion rod to engage, the hook can hook the insertion rod and fix it inside the square box, so that the square box and the square cover fit together tightly.

[0016] The bottom of both slide rods penetrates the bottom outer wall of the box and extends downwards. The slide rods are slidably connected to the inner wall of the penetration point. The outer wall dimension of the top of the button is smaller than the outer wall dimension of the bottom.

[0017] Furthermore, both slide rods have a frustum top, and both slide rods have a tension spring fitted on their outer sides. The bottom of the tension spring is installed on the inner wall of the bottom of the square box. The top outer wall of the frustum of the slide rod on the left side contacts the bottom outer wall of the cam, and the top outer wall of the frustum of the slide rod on the right side contacts the bottom outer wall of the insert rod. Both square boxes have wedges installed at their bottoms. The two wedges are horizontally mirrored with respect to the cylinder. The sides of the two wedges that are close to each other are installed on the outer wall of the outer shell, and the sides of the two wedges that are far apart from each other are inclined. Square and round convex plates are installed at the four corners of the sides of the two square boxes that are far apart from each other. The square and round convex plates of the square boxes have screw holes. By setting the tension spring fitted on the outer side of the bottom of the slide rod, it can absorb pressure when squeezed and release pressure outward and drive the slide rod to return to its original position after the pressure applied to the slide rod disappears.

[0018] The top of the tension spring is mounted on the bottom outer wall of the slide rod truncated cone, and the slide rod and the square box are flexibly connected by the spring.

[0019] Furthermore, the adjusting assembly includes a lead screw, which is threadedly connected to the center of the worm gear. The left and right sides of the worm gear extend outward through the worm gear housing and are rotatably connected. Knobs are installed on the left and right sides of the worm gear. The outer wall of the lead screw has four slots arranged in a circumferential array around the lead screw. A first insert plate is inserted into the top outer wall of each slot and is installed on the top inner wall of the worm gear housing. By setting the slots, the first insert plate, and the second insert plate, the displacement of the lead screw in the vertical direction can be restricted, preventing the lead screw from rotating and jamming with the worm gear during vertical displacement.

[0020] The slot has a second insert plate inserted into its bottom outer wall. The bottom outer walls of the four second insert plates are all installed on the inner wall of the cylinder. The four second insert plates are arranged in a circular array with the lead screw as the center.

[0021] Furthermore, a trapezoidal protrusion is rotatably connected to the bottom of the lead screw, and a silicone diaphragm abuts against the bottom of the trapezoidal protrusion. The silicone diaphragm is made of elastic material and can be elastically deformed. A push rod is installed at the bottom center of the silicone diaphragm, and a guide ring is sleeved on the outer side of the bottom outer wall of the push rod. The guide ring is located at the inner center of the bottom of the cylinder, and a circular hole is opened on the left side of the guide ring. A trapezoidal protrusion is provided below the guide ring. Rectangular protrusions are provided on both the front and back of the guide ring. The outer wall of the rectangular protrusion part of the guide ring is installed on the inner wall of the cylinder. The rectangular protrusion of the guide ring can divide the left and right sides of the cylinder into two parts, so that the left and right sides of the cylinder can only be connected to each other through the circular hole at the center of the guide ring.

[0022] Springs are installed at the bottom of both the ladder protrusion and the silicone diaphragm, and the diameter of the bottom outer wall of the ladder protrusion is larger than the diameter of the bottom outer wall of the guide ring.

[0023] This utility model has the following beneficial effects:

[0024] 1. This utility model, through the setting of an installation component, specifically, involves pressing down a button to cause the bottom of the cam to rotate. When the cam rotates, it causes the grab hook to deflect, thereby pulling the grab hook out of the rectangular hole of the insert rod. Then, the square cover is moved upward to pull out the insert rod. In this way, the rotation of the cam and the grab hook can be controlled by the button, thereby controlling the locking and unlocking of the square box and the square cover. When the lock is released, the cylinder can be removed by pulling the square cover upward. The disassembly steps are relatively simple, ensuring the efficiency of maintenance and repair of the pressure regulator.

[0025] 2. This utility model incorporates an adjustment component. Specifically, rotating a knob causes the worm gear to rotate, which in turn drives the worm wheel to rotate. The worm wheel, through a threaded screw, causes the trapezoidal protrusion to press down on the silicone diaphragm. The silicone diaphragm then pushes a push rod to press down on the trapezoidal protrusion. This allows for adjustment of the gap between the guide ring and the trapezoidal protrusion, gradually reducing the gap and obstructing the flow of gas into the guide ring. This, in turn, reduces the gas flow rate and pressure, making it convenient for operators to adjust the gas flow rate and pressure easily using the adjustment component.

[0026] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0029] Figure 2 This is a schematic diagram of the outer shell structure of this utility model;

[0030] Figure 3 This is a schematic cross-sectional view of the square box of this utility model;

[0031] Figure 4 This is a schematic cross-sectional view of the cylindrical body of this utility model;

[0032] Figure 5 This is a schematic diagram of the knob structure of this utility model.

[0033] The attached diagram lists the components represented by each number as follows:

[0034] 1. Adjustment mechanism; 11. Mounting assembly; 111. Cylinder; 112. Outer shell; 1131. Square box; 1132. Square cover; 114. Cam; 115. Insert rod; 116. Hook; 117. Button; 118. Slide rod; 12. Adjustment assembly; 121. Worm gear housing; 1221. Worm gear; 1222. Worm; 1223. Lead screw; 123. Knob; 1241. Groove; 1242. Insert plate one; 1243. Insert plate two; 125. Trapezoidal protrusion; 126. Silicone diaphragm; 127. Push rod; 128. Guide ring; 129. Trapezoidal protrusion. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0036] Please see Figures 1-5 As shown, this utility model is a gas pressure regulating structure, including a regulating mechanism 1. The regulating mechanism 1 is used to control the gas intake volume and intake flow rate. The regulating mechanism 1 includes a cylinder 111 and a worm gear housing 121. The cylinder 111 is hollow inside, and a housing 112 is fitted on the outer wall of the cylinder 111. A square box 1131 is installed at the center of the front and back of the housing 112. A square cover 1132 is provided on the top of each of the two square boxes 1131. The worm gear housing 121 is installed at the top center of the cylinder 111. A worm gear 1221 is rotatably connected to the center of the inside of the worm gear housing 121. A worm 1222 is meshed with the front of the worm gear 1221. The bottom outer walls of the two square covers 1132, which are close to each other, are installed on the outer wall of the cylinder 111. The two square boxes 1131 are arranged in a horizontal mirror image with the cylinder 111 as the center.

[0037] The regulating mechanism 1 includes a mounting assembly 11 for mounting the regulating structure near the equipment where air pressure needs to be controlled; and a regulating assembly 12 disposed on top of the regulating assembly 12 for controlling the distance of the internal gap of the regulating structure. The top of the mounting assembly 11 abuts against the bottom of the regulating assembly 12.

[0038] The mounting component 11 includes a cam 114, which is rotatably connected to the inner wall of the center of the square box 1131. A rod 115 is provided on the right side of the cam 114. The top of the rod 115 passes through the square box 1131 and extends upward. The outer wall of the cam 114 is slidably connected to the part of the square box 1131 through which the rod is passed. The top outer wall of the rod 115 is installed at the center of the bottom outer wall of the square cover 1132. A slot is provided at the center of the rod 115. The slot of the rod 115 is rectangular. A hook 116 is inserted into the inside of the rod 115.

[0039] The bottom left side of the grab hook 116 is mounted on the top right outer wall of the cam 114. A button 117 is provided on the top left side of the cam 114. The top of the button 117 extends upward through the square box 1131 and is slidably connected. The bottom outer wall of the button 117 abuts against the top left outer wall of the cam 114. A slide rod 118 is provided on the bottom left side of the cam 114 and the bottom of the insert rod 115. The bottom of both slide rods 118 extends downward through the bottom outer wall of the square box 1131. The slide rod 118 is slidably connected to the inner wall of the penetrating part. The outer wall size of the top of the button 117 is smaller than the outer wall size of the bottom.

[0040] Both slide rods 118 have a frustum top. The outer walls of both slide rods 118 are fitted with tension springs. The bottom of the tension springs on the slide rods 118 is mounted on the inner wall of the bottom of the square box 1131. The outer wall of the frustum top of the left slide rod 118 contacts the outer wall of the bottom of the cam 114, and the outer wall of the frustum top of the right slide rod 118 contacts the outer wall of the bottom of the insert rod 115. Both square boxes 1131 have wedges at their bottoms, arranged horizontally mirror-images of the cylinder 111. The sides of the two wedges closest to each other are mounted on the outer wall of the outer shell 112, while the sides furthest from each other are inclined. Square and round protrusions are installed at the four corners of the furthest sides of the two square boxes 1131. The square and round protrusions of the square boxes 1131 have openings... With a screw hole, pressing button 117 downwards causes the bottom of the cam 114 to rotate. When the cam 114 rotates, it will cause the hook 116 to deflect, thereby pulling the hook 116 out of the rectangular hole of the insert rod 115. Then, the square cover 1132 is moved upwards to pull out the insert rod 115. In this way, the rotation of the cam 114 and the hook 116 can be controlled by button 117, thereby controlling the locking and unlocking of the square box 1131 and the square cover 1132. When the lock is released, pulling the square cover 1132 upwards can remove the cylinder 111. The disassembly steps are relatively simple, ensuring the efficiency of maintenance of the pressure regulator. The top of the tension spring is installed on the bottom outer wall of the truncated cone of the slide rod 118. The slide rod 118 and the square box 1131 are flexibly connected by the spring.

[0041] The adjusting assembly 12 includes a lead screw 1223, which is threadedly connected to the center of the worm gear 1221. The left and right sides of the worm 1222 extend outward through the worm gear housing 121 and are rotatably connected. A knob 123 is installed on the left and right sides of the worm 1222. The outer wall of the lead screw 1223 has four slots 1241, which are arranged in a circular array around the lead screw 1223. A first insert plate 1242 is inserted into the top outer wall of the slot 1241 and is installed on the top inner wall of the worm gear housing 121.

[0042] Among them, the bottom outer wall of the slot 1241 is connected to the insert plate 1243, and the bottom outer walls of the four insert plates 1243 are all installed on the inner wall of the cylinder 111. The four insert plates 1243 are arranged in a circular array with the lead screw 1223 as the center.

[0043] A trapezoidal protrusion 125 is rotatably connected to the bottom of the lead screw 1223. A silicone diaphragm 126 abuts against the bottom of the trapezoidal protrusion 125. The silicone diaphragm 126 is made of elastic material and can undergo elastic deformation. A push rod 127 is installed at the center of the bottom of the silicone diaphragm 126. A guide ring 128 is sleeved on the outer side of the bottom outer wall of the push rod 127. The guide ring 128 is located at the center of the bottom of the cylinder 111. A circular hole is opened on the left side of the guide ring 128, and a trapezoidal protrusion 129 is located below the guide ring 128. Rotating the knob 123 causes the worm gear 1222 to rotate and drives the worm wheel 1221 to rotate, causing the worm wheel 1221 to pass through the threaded lead screw 122. 3. The trapezoidal protrusion 125 pushes the silicone diaphragm 126 downward, causing the silicone diaphragm 126 to push the push rod 127 downward to press the trapezoidal protrusion 129. This allows adjustment of the gap between the guide ring 128 and the trapezoidal protrusion 129, which gradually narrows, obstructing the flow of gas into the guide ring 128 and reducing the gas flow rate and pressure. This allows the operator to easily adjust the gas flow rate and pressure using the adjustment component 12. Springs are installed at the bottom of both the trapezoidal protrusion 129 and the silicone diaphragm 126. The diameter of the bottom outer wall of the trapezoidal protrusion 129 is larger than the diameter of the bottom outer wall of the guide ring 128.

[0044] A specific application of this embodiment is as follows: First, use bolts to pass through the square and round convex plates and install them near the equipment that needs to regulate gas pressure. Then, press down button 117 to make it push cam 114 to rotate. When cam 114 rotates, it will deflect, thereby causing hook 116 to lift and release its lock on box 1131. Then, take out cylinder 111 and align the square box 1131 installed on its front and back with square cover 1132, so that the hole of square cover 1132 is aligned with insertion rod 115.

[0045] Next, the cylinder 111 is moved downwards, and the square cover 1132 drives the insertion rod 115 to move downwards. After the bottom outer wall of the square cover 1132 contacts the top outer wall of the square box 1131, the insertion rod 115 is inserted into the inside of the square cover 1132. Then, the button 117 is released, and the slide rod 118 slides upwards and resets under the action of the tension spring. The button 117 and the cam 114 are pushed to reset. After the cam 114 is reset, the grab hook 116 will be inserted into the rectangular slot of the insertion rod 115, locking the square box 1131 together. Then, the cylinder 111 and the outer shell 112 are locked together, which makes it convenient for the staff to perform regular maintenance and upkeep on the cylinder 111.

[0046] Next, connect the device to the cylinder 111, and then turn the knob 123 to drive the worm 1222 to rotate. When the worm 1222 rotates, it will drive the worm wheel 1221 to rotate through the meshing connection. When the worm wheel 1221 rotates clockwise, it will drive the lead screw 1223 set at the center to move downward through the threaded connection. When the worm wheel 1221 rotates counterclockwise, the opposite will happen. When the lead screw 1223 moves, it will slide downward through the slot 1241 along the first insert plate 1242 and the second insert plate 1243 to prevent the lead screw 1223 from deflecting when moving downward.

[0047] Finally, the lead screw 1223 will drive the bottom rotating guide ring 128 to squeeze the silicone diaphragm 126 downward, causing the silicone diaphragm 126 to deform and press the ladder protrusion 129 downward through the push rod 127, creating a gap between the guide ring 128 and the ladder protrusion 129. When the gap is small, the flow of gas will be obstructed, thereby reducing its flow rate and flow volume. When the gap is large, the opposite will happen.

[0048] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0049] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the present utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A gas pressure regulating structure, characterized in that, include: Adjustment mechanism (1), the adjustment mechanism (1) is used to control the gas intake volume and intake flow rate, the adjustment mechanism (1) includes a cylinder (111) and a worm gear housing (121). The interior of the cylinder (111) is hollow, and the outer wall of the cylinder (111) is fitted with an outer shell (112). A square box (1131) is installed at the center of the front and back of the outer shell (112), and a square cover (1132) is provided on the top of the two square boxes (1131). The worm gear housing (121) is installed at the top center of the cylinder (111), and a worm gear (1221) is rotatably connected at the center inside the worm gear housing (121). A worm (1222) is meshed with the front of the worm gear (1221). The bottom outer walls of the two square covers (1132) are installed on the outer wall of the cylinder (111) on the side closest to each other, and the two square boxes (1131) are arranged in a horizontal mirror image with the cylinder (111) as the center.

2. The gas pressure regulating structure according to claim 1, characterized in that, The regulating mechanism (1) includes a mounting assembly (11) for mounting the regulating structure near the equipment where air pressure needs to be controlled; Adjustment component (12), the adjustment component (12) is disposed on the top of the adjustment component (12), the adjustment component (12) is used to control the distance of the internal gap of the adjustment structure; The top of the mounting component (11) abuts against the bottom of the adjusting component (12).

3. The gas pressure regulating structure according to claim 2, characterized in that, The mounting assembly (11) includes a cam (114), which is rotatably connected to the inner wall of the center of the square box (1131). A rod (115) is provided on the right side of the cam (114). The top of the rod (115) passes through the square box (1131) and extends upward. The outer wall of the cam (114) is slidably connected to the part of the square box (1131) that is passed through. The top outer wall of the rod (115) is installed at the center of the bottom outer wall of the square cover (1132). A slot is provided at the center of the rod (115). The slot of the insert (115) is rectangular, and a hook (116) is inserted inside the insert (115).

4. The gas pressure regulating structure according to claim 3, characterized in that, The bottom left side of the hook (116) is mounted on the top right outer wall of the cam (114). A button (117) is provided on the top left side of the cam (114). The top of the button (117) extends upward through the square box (1131) and is slidably connected. The bottom outer wall of the button (117) abuts against the top left outer wall of the cam (114). A slide rod (118) is provided on the bottom left side of the cam (114) and the bottom of the insert rod (115). The bottom of both slide rods (118) penetrates the bottom outer wall of the square box (1131) and extends downward. The slide rods (118) are slidably connected to the inner wall of the penetration point. The outer wall size of the top of the button (117) is smaller than the outer wall size of the bottom.

5. A gas pressure regulating structure according to claim 4, characterized in that, The top of both slide rods (118) is set as a frustum. The outer side of the outer wall of both slide rods (118) is fitted with a tension spring. The bottom of the tension spring of the slide rod (118) is installed on the inner wall of the bottom of the square box (1131). The top outer wall of the frustum of the slide rod (118) on the left side is in contact with the bottom outer wall of the cam (114). The top outer wall of the frustum of the slide rod (118) on the right side is in contact with the bottom outer wall of the insert rod (115). The bottom of both square boxes (1131) is equipped with wedges. The two wedges are set horizontally in a mirror image with the cylinder (111) as the center. The side of the two wedges that are close to each other is installed on the outer wall of the outer shell (112). The side of the two wedges that are far apart from each other is set as an inclined surface. The four corners of the side of the two square boxes (1131) that are far apart from each other are equipped with square and round convex plates. The square and round convex plates of the square box (1131) are provided with screw holes. The top of the tension spring is mounted on the bottom outer wall of the truncated cone of the slide rod (118), and the slide rod (118) and the square box (1131) are flexibly connected by the spring.

6. The gas pressure regulating structure according to claim 2, characterized in that, The adjustment assembly (12) includes a lead screw (1223), which is threadedly connected to the center of the worm gear (1221). The left and right sides of the worm gear (1222) extend outward through the worm gear housing (121) and are rotatably connected. The left and right sides of the worm gear (1222) are equipped with knobs (123). The outer wall of the lead screw (1223) is provided with four slots (1241). The four slots (1241) are arranged in a circular array with the lead screw (1223) as the center. A first insert plate (1242) is inserted into the top outer wall of the slot (1241). The first insert plate (1242) is installed on the top inner wall of the worm gear housing (121). Among them, the bottom outer wall of the slot (1241) is connected to the second insert plate (1243), and the bottom outer walls of the four second insert plates (1243) are all installed on the inner wall of the cylinder (111). The four second insert plates (1243) are arranged in a circular array with the lead screw (1223) as the center.

7. A gas pressure regulating structure according to claim 6, characterized in that, The bottom of the lead screw (1223) is rotatably connected to a trapezoidal protrusion (125). The bottom of the trapezoidal protrusion (125) abuts against a silicone diaphragm (126). The silicone diaphragm (126) is made of elastic material and can be elastically deformed. A push rod (127) is installed at the bottom center of the silicone diaphragm (126). A guide ring (128) is sleeved on the outer side of the bottom outer wall of the push rod (127). The guide ring (128) is located at the inner center of the bottom of the cylinder (111). A round hole is opened on the left side of the guide ring (128). A trapezoidal protrusion (129) is provided below the guide ring (128). Springs are installed at the bottom of both the ladder protrusion (129) and the bottom of the silicone diaphragm (126), and the bottom outer wall diameter of the ladder protrusion (129) is larger than the bottom outer wall diameter of the guide ring (128).

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