High-efficiency gas pressure regulating valve

Abstract

The utility model discloses a high-efficiency gas pressure regulating valve. Comprising a valve body and an upper cover body, a valve cavity is formed in the valve body, and a valve rod is arranged in the valve cavity; one end of the valve rod is connected with the upper cover body, and the other end of the valve rod extends into the valve cavity; one end of the rocker arm penetrates through the valve rod and is movably connected with the elastic compensation assembly, and the other end of the rocker arm is movably connected with the pressure regulating valve rod at the air inlet end of the valve body; the elastic compensation assembly comprises a guide seat and a limiting rod; one end of the guide seat is connected with the valve body, and the other end of the guide seat is provided with a limiting cavity; one end of the limiting rod extends into the limiting cavity, and the other end is connected with the rocker arm; and the other end of the spring is connected with the limiting rod. The valve body is linked with the rocker arm and the elastic compensation assembly, the elastic compensation assembly makes corresponding actions while pressure change movement of the pressure regulating main spring of the valve body is achieved, elastic attenuation of the pressure regulating main spring in the upper cover body is compensated, and on the basis that the pressure regulating precision of the valve body is improved, the closing pressure of the valve body can be reduced. Therefore, the stress area of the dynamic rubber diaphragm can be correspondingly reduced, the service life of the rubber diaphragm is prolonged, and the safety performance is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves, and particularly relates to a high-efficiency gas pressure regulator. Background Art

[0002] The same type of gas pressure regulators used in existing daily life and industrial production have the following several defects: 1. Within a certain parameter range, the pressure-bearing cavity of the valve chamber is large, the diaphragm's pressure-receiving area is large, and when the air pressure in the valve chamber often suddenly changes, the diaphragm is affected by the working pressure and is prone to deformation or damage, resulting in a shortened service life of the pressure regulator; at the same time, the main regulating spring of the pressure regulator is prone to attenuation, making the regulating pressure of the pressure regulator unable to reach the designed pressure, resulting in a decline in pressure regulation accuracy. Content of the Utility Model

[0003] In view of this, the present application provides a high-efficiency gas pressure regulator, which is a gas pressure regulator that improves the pressure regulation performance of the existing pressure regulator by adding a set of elastic compensation components in the valve body of the existing pressure regulator as a pressure regulation accessory. It is used to solve the defects in the prior art. The specific solution is as follows:

[0004] A high-efficiency gas pressure regulator, comprising: a valve body and an upper cover body, the upper cover body is installed on the top of the valve body, a valve chamber is provided in the valve body, and it is characterized in that a valve rod is arranged vertically along the center of the valve chamber;

[0005] One end of the valve rod is connected to the upper cover body, the other end of the valve rod extends into the valve chamber, a rocker arm and an elastic compensation component are respectively arranged on both sides of the valve rod, and the valve rod moves up and down with the change of the air pressure in the valve chamber;

[0006] The rocker arm and the elastic compensation component are respectively located at the air inlet end and the air outlet end of the valve body;

[0007] The rocker arm is movably connected to the inner wall of one end of the valve body near the air inlet end, one end of the rocker arm passes through the rod body near the bottom end of the valve rod and is movably connected to the elastic compensation component, and the other end of the rocker arm is movably connected to the pressure regulator at the air inlet end of the valve body;

[0008] The elastic compensation component includes a guide seat and a limit rod;

[0009] One end of the guide seat is movably connected to the inner side of the top of one end of the valve body near the air outlet end, the other end of the guide seat is provided with a limit cavity, and a spring is sleeved outside the guide seat;

[0010] One end of the limit rod extends into the limit cavity, and the other end of the limit rod is rotatably connected to the rocker arm facing away from the air inlet end of the valve body;

[0011] One end of the spring is fixedly connected to the guide seat, and the other end of the spring is fixedly connected to one end of the limit rod close to the rocker arm.

[0012] Preferably, one end of the rocker arm connected to the valve stem is integrally wavy, and the part of the rocker arm passing through the rod body at the bottom end of the valve stem is in a concave arc-shaped structure.

[0013] Preferably, a connection groove is provided on the rod body of the valve stem near the bottom end;

[0014] The top of the connection groove is in a convex arc-shaped structure, a fulcrum is provided on the inner side of the bottom of the connection groove, one end of the rocker arm extending into the valve stem is placed on the fulcrum and rotates around the fulcrum.

[0015] Preferably, when the diaphragm is in a balanced state, the connection between the guide seat and the valve body, the connection between the rocker arm and the limit rod, and the connection between the rocker arm and the valve body are on the same straight line.

[0016] Preferably, the pressure regulating valve includes an air inlet, a sealing part, a valve head rod and a valve port arranged along the direction of the intake air flow;

[0017] The sealing part includes a sealing head and an overcurrent ring arranged outside the sealing head;

[0018] The overcurrent ring is located between the air inlet and the valve port, and a plurality of air holes are evenly arranged on the overcurrent ring, so that the gas flows from the air inlet to the valve port, and the overcurrent ring is installed on the inner wall of the air inlet end of the valve body;

[0019] The sealing head is installed inside the overcurrent ring and moves along the axial direction of the overcurrent ring;

[0020] A sealing gasket is installed at the valve port;

[0021] One end of the valve head rod passes through the valve port and extends into the sealing head to be connected with the sealing head, and the other end of the valve head rod extends into the valve cavity and is rotatably connected with the rocker arm.

[0022] Preferably, the minimum elastic variable of the spring is greater than the gap between the air inlet and the valve port and less than the maximum elastic variable of the main regulating spring in the upper cover body.

[0023] Compared with the prior art, the beneficial effects of the present application are as follows:

[0024] In this application, the rocker arm is movably connected to the valve cavity at the intake end of the valve body. One end of the rocker arm is connected to the pressure regulating valve, and the other end of the rocker arm passes through the rod body at the bottom end of the valve stem and is connected to the elastic compensation component, realizing the linkage of the valve body with the rocker arm and the elastic compensation component. Thus, while the valve body moves, the elastic compensation component makes corresponding movements to compensate for the elastic attenuation in the upper cover body, optimize the pressure regulating range of the pressure regulating spring, keep the product in a steady flow and steady pressure state, improve the pressure regulating accuracy, achieve precise pressure regulation, avoid energy waste, and thereby provide a high-efficiency gas pressure regulating valve. At the same time, through the elastic compensation of the compensation component, the pressure regulating range of the pressure regulator is always within the set standard bandwidth range, thereby improving the safety performance of the pressure regulator. The stable air pressure in the valve cavity prevents the diaphragm from being deformed easily due to sudden changes in the air pressure in the valve cavity, resulting in a reduction in the service life of the pressure regulator;

[0025] Meanwhile, the pressure regulating accuracy of this pressure regulator can be achieved only through the elastic compensation component, without the need for precise voltage stabilizing instruments or complex structures, avoiding high manufacturing costs and high maintenance and usage costs;

[0026] Moreover, in this application, the elastic compensation component is arranged in the valve cavity of the pressure regulator, without deliberately increasing the volume of the valve body, thus avoiding the situation where the valve body is large in volume due to the addition or subtraction of additional accessories, occupying the effective space volume. Description of the Drawings

[0027] Figure 1 It is a structural schematic diagram of a high-efficiency gas pressure regulating valve;

[0028] Reference Signs:

[0029] 1. Valve head rod; 2. Valve port; 3. Sealing head; 4. Diaphragm; 5. Valve cover; 6. Main regulating spring; 7. Knob; 8. Valve stem; 9. Outlet end; 10. First connection point; 11. Guide seat; 12. Spring; 13. Limit rod; 14. Retaining ring; 15. Second connection point; 16. Connection groove; 17. Fulcrum; 18. Valve cavity; 19. Rocker arm; 20. Third connection point. Detailed Embodiments

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] Please refer to Figure 1, the present utility model provides a high-efficiency gas pressure regulating valve, comprising: a valve body and an upper cover body, the upper cover body is installed on the top of the valve body, both ends of the valve body are respectively an air inlet end and an air outlet end 9, a valve cavity 18 is arranged inside the valve body, and a valve rod 8 is arranged along the vertical direction at the center of the valve cavity 18;

[0032] A pressure regulating valve is arranged at the air inlet end;

[0033] The upper cover body in this application is a conventional upper cover body structure in this industry, specifically including a valve cover 5, a regulating main spring 6 arranged inside the valve cover 5, a lifting knob 7 arranged on the top of the valve cover 5, and a diaphragm 4 clamped between the valve cover 5 and the valve body; the valve cover 5 is detachably connected to the top of the valve body. The diaphragm 4 is connected to the inner side of the bottom of the valve cover 5, the lifting knob 7 is movably buckled on the top of the valve cover 5 to cover the top of the valve cover 5, the diaphragm 4 is located at the bottom of the valve cover 5, and the bottom of the valve cover 5 presses against the edge of the diaphragm 4 to realize the shielding of the bottom of the valve cover 5. The connections of the valve cover 5 with the lifting knob 7 and the diaphragm 4 respectively constitute the structure of the upper cover body of the pressure regulating valve.

[0034] The regulating main spring 6 is sleeved on the inner side of the top of the valve cover 5, one end of the regulating main spring 6 is connected to the valve cover 5, the other end of the regulating main spring 6 is connected to the valve cover 5, one end of the valve rod 8 passes through the diaphragm 4, the valve cover 5 and is connected to the lifting knob 7, the other end of the valve rod 8 extends into the valve cavity 18, and swing arms 19 and an elastic compensation component are respectively arranged on both sides of the end of the valve rod 8 extending into the valve cavity 18; as the air pressure in the valve cavity 18 increases or decreases, the diaphragm 4 located between the valve cavity 18 and the valve cover 5 bulges upward or downward correspondingly, thereby driving the lifting knob 7 and the valve rod 8 to move up and down, and the regulating main spring 6 compresses or elongates correspondingly with the movement of the valve rod 8.

[0035] The swing arms 19 and the elastic compensation component are respectively located at the air inlet end and the air outlet end 9 of the valve body;

[0036] One end of the swing arm 19 passes through the rod body near the bottom end of the valve rod 8 and is movably connected to the elastic compensation component, and the other end of the swing arm 19 is movably connected to the pressure regulating valve at the air inlet end of the valve body;

[0037] The elastic compensation component includes a guide seat 11 and a limit rod;

[0038] One end of the guide seat 11 is rotatably connected to the inner side of the top of one end of the valve body near the air outlet end 9 through a rotating shaft, a limit cavity is arranged at the other end of the guide seat 11, and a spring 12 is sleeved outside the guide seat 11;

[0039] One end of the limit rod 13 extends into the limit cavity, and the other end of the limit rod is rotatably connected to the end of the swing arm 19 facing away from the air inlet end of the valve body through but not limited to a rotating shaft;

[0040] One end of the spring 12 is fixedly connected to the guide seat 11, and the other end of the spring 12 is fixedly connected to one end of the limit rod close to the rocker arm 19.

[0041] In an embodiment of the present application, a spring retainer 14 is provided at one end of the limit rod connected to the rocker arm 19. The spring retainer 14 is located at the end of the spring. The spring retainer 14 is fixed on the limit rod, and the spring is fixedly connected to the spring retainer 14.

[0042] In the present application, the limit groove is arranged along the extending direction of the guide seat 11, and the length of the limit groove is greater than the maximum expansion and contraction amount of the spring.

[0043] Further, the pressure regulating valve includes an air inlet, a sealing part, a valve head rod 1 and a valve port 2 arranged along the direction of the intake air flow;

[0044] The sealing part includes a sealing head 3 and a flow-through ring arranged outside the sealing head 3. The flow-through ring is located between the air inlet and the valve port 2. A plurality of air holes are uniformly arranged on the flow-through ring, so that the gas flows from the air inlet to the valve port 2. The flow-through ring is installed on the inner wall of the air inlet end of the valve body; the sealing head 3 is installed inside the flow-through ring and moves along the axial direction of the flow-through ring;

[0045] A gasket is installed at the valve port 2. The gasket is installed inside the valve port 2. The valve head rod is integrally cross-shaped. One end of the valve head rod 1 passes through the valve port 2 and extends into the sealing head 3 and is connected to the sealing head 3. The vertical rod in the middle of the valve head rod 1 is located inside the air inlet end of the valve body. The other end of the valve head rod 1 extends into the valve cavity 18 and is rotatably connected to the rocker arm 19.

[0046] In the present application, the rocker arm 19 is integrally in an L-shaped structure. The corner of the rocker arm 19 is connected to the inner wall of one end of the valve cavity 18 close to the air inlet end of the valve body through, but not limited to, a rotating shaft. One end of the rocker arm 19 close to the air inlet end of the valve body is connected to a connecting column through a connection port (specifically, a connection port is provided on the rocker arm 19, the connecting column is fixed on the inner wall of the valve body, the connection port is sleeved outside the connecting column and rotates around the connecting column); the other end of the rocker arm 19 is connected to the valve rod 8.

[0047] Further, one end of the rocker arm 19 connected to the valve rod 8 is integrally wavy, and the part of the rocker arm 19 passing through the rod body at the bottom end of the valve rod 8 is in an arc-shaped structure with the opening facing downwards.

[0048] Further, a connection groove 16 is provided on the rod body of the valve rod 8 close to the bottom end;

[0049] The top of the connecting groove 16 is an arc-shaped structure protruding downward, and a fulcrum 17 is arranged on the inner side of the bottom of the connecting groove 16. One end of the rocker arm 19 extending into the valve stem 8 rests on the fulcrum 17 and rotates around the fulcrum 17.

[0050] In this application, through the linkage connection of the valve stem 8 with the elastic compensation component and the rocker arm 19, the elastic compensation of the main spring 6 is adjusted, so as to solve the problem that when the main spring 6 is used for a long time and its elastic force weakens, the valve will not close tightly or even cannot close, thus bringing potential safety hazards to the self-closing valve. Specifically:

[0051] When the air pressure in the valve cavity 18 is within the normal range, at this time, the connection point between the guide seat 11 and the valve body, the connection point between the limit rod and the rocker arm 19, and the connection point between the rocker arm 19 and the valve body are almost on the same straight line, and at this time the spring 12 is in a natural state (that is, neither elongated nor compressed).

[0052] When the air pressure value in the valve cavity 18 gradually increases, the diaphragm 4 bulges upward, the compression potential energy of the regulating main spring 6 gradually increases, the lifting knob 7 and the valve stem 8 move upward as a whole, one end of the rocker arm 19 connected to the valve stem 8 moves upward, so that the valve stem 8 rotates counterclockwise around its connection with the valve body. At this time, the rocker arm 19 pushes the valve head rod 1 to drive the sealing head 3 to move toward the air inlet side, and the spring 12 is gradually compressed. Until the pressure in the valve cavity 18 exceeds the pressure limit value, at this time, the compression potential energy of the regulating main spring 6 reaches the maximum. Under normal circumstances (that is, when the regulating main spring 6 has not undergone elastic attenuation), after the regulating main spring 6 is completely compressed, the rocker arm 19 should push the valve head rod 1 to move to the air inlet and be in full contact with the air inlet to achieve safe cut-off of the air intake; but when the regulating main spring 6 is used for a long time and its elasticity decays and loses part of its elasticity, resulting in the inability of the regulating main spring 6 to be completely compressed, and the rocker arm 19 cannot push the valve head rod 1 to move to the air inlet and be in full contact with the air inlet, which leads to a gap between the sealing head 3 and the air inlet and cannot achieve complete cut-off of the air intake.

[0053] And in this application, a pressure regulating mechanism is provided. When the air pressure in the valve cavity 18 is normal, the connection point between the guide seat 11 and the valve body (i.e., the first connection point 10), the connection point between the limit rod 13 and the rocker arm 19 (i.e., the second connection point 15), and the connection point between the rocker arm 19 and the valve body (i.e., the third connection point 20) are almost on the same straight line. When the pressure value in the valve cavity 18 gradually increases, one end of the rocker arm 19 connected to the pressure regulating mechanism moves upward, resulting in gradual compression. When the pressure value in the valve cavity 18 reaches the maximum limit value, the spring 12 begins to change from compression to tension and starts to release its own compression potential energy, so that the rocker arm 19 further rotates counterclockwise, pushing the valve head rod 1 and the sealing head 3 to continue to move until the sealing head 3 is in full contact with the air inlet, cutting off the air intake, and compensating for the compression elasticity attenuation of the regulating main spring 6;

[0054] When the air pressure value in the valve chamber 18 gradually decreases, the diaphragm 4 bulges downward, the adjusting main spring 6 gradually elongates, the lifting knob 7 and the valve stem 8 move downward as a whole, and the end of the rocker arm 19 connected to the valve stem 8 moves upward, causing the valve stem 8 to rotate clockwise around the connection with the valve body. At this time, the rocker arm 19 pushes the valve head rod 1 to drive the sealing head 3 to move toward the valve port 2 side, and the spring 12 is gradually stretched. When the pressure in the valve chamber 18 is lower than the pressure limit value, the adjusting main spring 6 is stretched to the maximum. Under normal circumstances (that is, when the adjusting main spring 6 has not undergone elastic attenuation), after the adjusting main spring 6 is fully stretched, the rocker arm 19 should push the valve head rod 1 to move to the valve port 2 and be in full contact with the valve port 2 to achieve safe cut-off of the intake air. However, when the adjusting main spring 6 is used for a long time, its elasticity decays and it loses some of its elasticity, resulting in the inability of the adjusting main spring 6 to be fully stretched, and the rocker arm 19 cannot push the valve head rod 1 to move to the valve port 2 and be in full contact with the valve port 2. This causes a gap between the sealing head 3 and the valve port 2, and the intake air cannot be completely cut off.

[0055] In this application, a pressure regulating mechanism is provided. When the air pressure in the valve chamber 18 is normal, the connection point of the guide seat 11 and the valve body, the connection point of the limit rod and the rocker arm 19, and the connection point of the rocker arm 19 and the valve body are almost on the same straight line. When the pressure value in the valve chamber 18 gradually decreases, the end of the rocker arm 19 connected to the pressure regulating mechanism moves downward, causing it to gradually elongate. When the pressure value in the valve chamber 18 reaches the minimum limit value, the spring 12 starts to change from being stretched to being compressed, thereby causing the rocker arm 19 to rotate further clockwise, and then pushing the valve head rod 1 and the sealing head 3 to continue moving to the right until the sealing head 3 is in full contact with the valve port 2, cutting off the intake air and compensating for the elastic attenuation of the stretching of the adjusting main spring 6.

[0056] Thus, it is realized that the elastic compensation component is used to solve the problem that the pressure regulating accuracy of the valve decreases due to the elastic attenuation of the adjusting main spring 6.

[0057] Furthermore, when the diaphragm 4 in the upper cover body is in balance, the connection point of the guide seat 11 and the valve body, the connection point of the limit rod and the rocker arm 19, and the connection point of the rocker arm 19 and the valve body are on the same straight line.

Claims

1. A high-efficiency gas pressure regulating valve, comprising: A valve body and an upper cover body, wherein the upper cover body is mounted on the top of the valve body, and a valve cavity is arranged in the valve body, wherein a valve stem is arranged in the center of the valve cavity along the vertical direction; One end of the valve stem is connected to the upper cover body, and the other end of the valve stem extends into the valve cavity. Rocker arms and elastic compensation components are respectively provided on both sides of the valve stem, and the valve stem moves up and down as the air pressure in the valve cavity changes; The rocker arm and the elastic compensation component are respectively located at the air inlet end and the air outlet end of the valve body; The rocker arm is movably connected to the inner wall of one end of the valve body close to the air inlet end, one end of the rocker arm passes through the rod body close to the bottom end of the valve stem and is movably connected to the elastic compensation component, and the other end of the rocker arm is movably connected to the pressure regulating valve at the air inlet end of the valve body; The elastic compensation component includes a guide seat and a limit rod; One end of the guide seat is movably connected to the inner side of the top of one end of the valve body close to the gas outlet end, the other end of the guide seat is provided with a limited position cavity, and the outer sleeve of the guide seat is provided with a spring; One end of the limiting rod extends into the limiting cavity, and the other end of the limiting rod is rotatably connected to one end of the rocker arm facing away from the air inlet end of the valve body; One end of the spring is fixedly connected to the guide seat, and the other end of the spring is fixedly connected to an end of the limiting rod close to the rocker arm.

2. A high-efficiency gas pressure regulating valve according to claim 1, characterized in that: The end of the rocker arm connected to the valve stem is wavy in shape as a whole, and the portion of the rocker arm that passes through the rod body at the bottom end of the valve stem is in a concave arc-shaped structure.

3. A high-efficiency gas pressure regulating valve according to claim 1, characterized in that: A connecting groove is provided on the rod body of the valve rod near the bottom end; The top of the connecting groove is in a downwardly convex arc structure, and a fulcrum is arranged on the inner side of the bottom of the connecting groove. One end of the rocker arm extending into the valve stem rests on the fulcrum and rotates around the fulcrum.

4. A high-efficiency gas pressure regulating valve according to claim 1, characterized in that: When the diaphragm is in a balanced state, the connection between the guide seat and the valve body, the connection between the rocker arm and the limit rod, and the connection between the rocker arm and the valve body are located on the same straight line.

5. A high-efficiency gas pressure regulating valve according to claim 1, characterized in that: The pressure regulating valve comprises an air inlet, a sealing portion, a valve head stem and a valve port arranged along the air flow direction of the air inlet; The sealing part includes a sealing head and a flow ring arranged outside the sealing head; The flow ring is located between the air inlet and the valve port, and a plurality of air holes are evenly arranged on the flow ring to allow the gas to flow from the air inlet to the valve port. The flow ring is installed on the inner wall of the air inlet end of the valve body; The sealing head is installed inside the flow ring and moves along the axial direction of the flow ring; A sealing gasket is installed at the valve port; One end of the valve head rod extends into the sealing head through the valve port and is connected to the sealing head, and the other end of the valve head rod extends into the valve cavity and is rotatably connected to the rocker arm.

6. A high-efficiency gas pressure regulating valve according to claim 5, characterized in that: The minimum elastic variable of the spring is greater than the gap between the air inlet and the valve port, and less than the maximum elastic variable of the regulating main spring in the upper cover body.

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