Self-cleaning, damping and anti-collision breather valve structure

Abstract

The invention discloses a self-cleaning, damping and anti-collision breather valve structure, and relates to the technical field of breather valves, the self-cleaning, damping and anti-collision breather valve structure comprises an exhalation valve mechanism and a suction valve mechanism, the suction valve mechanism is arranged at the lower part of the exhalation valve mechanism, the exhalation valve mechanism comprises a fixed valve rod and an exhalation valve disc, and the exhalation valve disc and the fixed valve rod are assembled through a nut; the fixed valve rod is of a spiral structure; the suction valve mechanism comprises a suction valve fixing rod and a suction valve disc, folded edges are arranged on the edges of the suction valve disc and the exhalation valve disc, notches are formed in the folded edges, and the direction of the folded notches in the folded edges is matched with the spiral direction of the suction valve fixing rod and the spiral direction of the fixed valve rod. According to the breather valve structure with the self-cleaning, damping and anti-collision functions, the positioning sleeve rod is cleaned, the problems that the sleeve rod is blocked and the valve disc and the valve seat are adhered are solved, the damping and anti-collision functions are achieved through the arrangement of the spring ring, damage to the valve seat and the sealing membrane can be reduced, and the long-term use reliability of the breather valve is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of breathing valves, in particular to a breathing valve structure capable of self-cleaning, shock absorption and collision prevention. Background Art

[0002] Storage tanks are indispensable equipment in the oil industry. Storage tanks are easily affected by the external ambient temperature and the flow of materials in and out, which causes changes in the air pressure in the tank, resulting in overpressure or negative pressure, and causing the tank to bulge or deflate. The breathing valve is an important accessory to protect the safety of oil storage tanks. It can maintain the air pressure balance in the tank by exhaling and inhaling. Within the set pressure range, the valve disc of the breathing valve remains in contact with the valve seat; when the pressure in the tank rises to the set pressure, the exhalation valve disc of the breathing valve opens and exhales the gas. After the pressure returns to the normal range, the valve disc automatically falls back; when the pressure in the tank drops to the set pressure, the inhalation valve disc of the breathing valve opens and inhales the gas until the pressure returns to normal. The breathing valve can effectively control the pressure in the tank and prevent the tank from being damaged by overpressure or negative pressure. At the same time, it can also reduce energy waste and avoid environmental pollution.

[0003] During the use of mechanical breathing valves, if they are not maintained for a long time, dust, rust and other debris will be attached and deposited in the sleeve rod above the valve disc of the breathing valve, blocking the sleeve rod and hindering the free movement of the valve stem therein. Or, due to chemical and physical changes caused by the mixture of steam, moisture and dust, rust and other debris accumulated on the valve disc and valve seat, the valve disc and valve seat will be bonded, which will cause the breathing valve to be unable to breathe, and it is very easy to cause the positive pressure of the storage tank to exceed the limit or the negative pressure to collapse. In addition, during the opening and closing process of the breathing valve, the heavy valve disc repeatedly hits the valve seat, which will also cause wear on the sealing surface, thereby affecting the sealing performance of the breathing valve. These problems seriously threaten the safety of oil storage tanks. Summary of the invention

[0004] The purpose of the present invention is to provide a self-cleaning, shock-absorbing and anti-collision breathing valve structure to reduce the risk of sleeve rod clogging, valve disc and valve seat adhesion, and valve disc falling quickly and hitting the valve seat to damage the sealing surface, thereby ensuring the reliability of the breathing valve in long-term use.

[0005] To achieve the above-mentioned objectives, the present invention provides a self-cleaning, shock-absorbing and anti-collision breathing valve structure, the exhalation valve mechanism and the inhalation valve mechanism, the inhalation valve mechanism is arranged at the lower part of the exhalation valve mechanism, the exhalation valve mechanism includes a fixed valve stem and an exhalation valve disc, the exhalation valve disc and the fixed valve stem are assembled by a nut, and the fixed valve stem is arranged as a spiral structure; the inhalation valve mechanism includes an inhalation valve fixing rod and an inhalation valve disc, the edges of the inhalation valve disc and the exhalation valve disc are both provided with folded edges, the folded edges are provided with notches, and the direction of the notch folded at the folded edge matches the spiral direction of the inhalation valve fixing rod and the fixed valve stem.

[0006] Preferably, a plurality of the notches are provided, and the notches are provided in a triangular structure or a rectangular structure.

[0007] Preferably, the exhalation valve disc and the suction valve disc are both provided with spring coils, the spring coils are composed of a jacket and a metal sheet spring, the metal sheet spring is arranged inside the jacket, and the cross section of the jacket matches the structure of the metal sheet spring.

[0008] Preferably, the cross-sectional structure of the jacket is any one of a V-shaped structure, a U-shaped structure, and a rectangular structure.

[0009] Preferably, the suction valve fixing rod is slidably connected to the suction valve sleeve rod, the suction valve sleeve rod is arranged inside the fixed part on the suction valve and is fixedly connected to the suction valve through a thread, a fixing ring is arranged outside the fixed part of the suction valve, the fixing ring is arranged on the upper part of the suction valve counterweight, the suction valve counterweight is arranged on the upper part of the suction valve disc, and a suction valve seat is arranged on the lower part of the suction valve disc.

[0010] Preferably, the lower portion of the suction valve fixing rod is connected to a fixing bracket, and the end portion of the fixing bracket is connected to the inside of the valve body.

[0011] Preferably, a call valve counterweight is provided on the upper part of the call valve disc, a counterweight positioning ring is provided on the upper part of the call valve counterweight, the counterweight positioning ring and the call valve counterweight are connected to the fixed valve stem, and the fixed valve stem is slidably connected to the positioning sleeve rod.

[0012] Preferably, the upper portion of the positioning sleeve rod is threadedly connected to the upper bracket, and the lower end of the upper bracket is provided with a three-hole flange, and the three-hole flange is fixedly connected to the inside of the valve body.

[0013] Preferably, a rain cover is provided on the outside of the positioning sleeve rod, an outer cylinder is provided at the lower part of the rain cover, the lower part of the outer cylinder is connected to an elliptical seal head, and the lower part of the elliptical seal head is connected to a flange pipe.

[0014] Therefore, the present invention adopts the above-mentioned self-cleaning, shock-absorbing and anti-collision breathing valve structure, which has the following beneficial effects:

[0015] (1) The present invention integrates the two functions of cleaning and shock absorption and collision prevention of the breathing valve structure, reduces the clogging of the sleeve rod, and reduces the wear of the valve seat sealing surface, thereby ensuring the reliability of the breathing valve in long-term use.

[0016] (2) The present invention solves the problems of sleeve rod blockage and valve disc and valve seat adhesion by setting the valve disc and valve stem. The edges and corners on the spiral groove of the valve stem can scrape the inner wall of the positioning sleeve rod, remove the dirt attached to the inner wall of the positioning sleeve rod, clean the positioning sleeve rod and ensure the normal opening and closing of the call valve.

[0017] (3) The present invention forms a buffer when the valve cover contacts the valve seat by setting the spring ring.

[0018] It plays a role in shock absorption and collision prevention, and can reduce damage to the valve seat and sealing diaphragm.

[0019] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of an embodiment of the self-cleaning, shock-absorbing and collision-proof breathing valve structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the call valve mechanism of the present invention;

[0022] Figure 3 It is an isometric view of the call valve mechanism of the present invention;

[0023] Figure 4 It is a schematic diagram of the structure of the suction valve mechanism of the present invention;

[0024] Figure 5 It is an isometric view of the suction valve mechanism of the present invention;

[0025] Figure 6 is a cross-sectional view of a spring coil of the present invention;

[0026] Figure 7 This is the cross-section example 1 of the spring coil of the present invention;

[0027] Figure 8 This is Example 2 of the cross section of the spring coil of the present invention;

[0028] Fig. 9 This is the cross-section example 3 of the spring coil of the present invention;

[0029] Fig.10 This is Example 4 of the cross section of the spring coil of the present invention;

[0030] Fig.11 This is the cross-section example 5 of the spring coil of the present invention;

[0031] Reference numerals

[0032] 1. Rain cover; 2. Flange pipe; 3. Elliptical head; 4. Outer tube; 5. Lifting eye screw; 6. Exhalation valve mechanism; 61. Positioning sleeve rod; 62. Fixed valve stem; 63. Counterweight positioning ring; 64. Exhalation valve counterweight; 65. Exhalation valve disc; 66. Exhalation valve seat; 67. Nut; 7. Suction valve mechanism; 71. Suction valve upper fixing; 72. Fixing ring; 73. Suction valve counterweight; 74. Suction valve disc; 75. Suction valve seat; 76. Suction valve fixing rod; 77. Fixing rod bracket; 78. Suction valve sleeve rod; 8. Folding edge; 9. Spring ring; 91. Jacket; 92. Metal sheet spring. DETAILED DESCRIPTION

[0033] The technical solution of the present invention is further described below through the accompanying drawings and embodiments.

[0034] Unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0035] Example

[0036] See also Figure 1-11 The present invention provides a self-cleaning, shock-absorbing and anti-collision breathing valve structure, including an exhalation valve mechanism 6 and an inhalation valve mechanism 7, the inhalation valve mechanism 7 is arranged at the lower part of the exhalation valve mechanism 6, the exhalation valve mechanism 6 and the inhalation valve mechanism 7 are both arranged inside an outer tube 4, a rain cover 1 is arranged at the upper part of the outer tube 4, the upper end of the rain cover 1 is connected to the lifting eye screw 5, the lower part of the outer tube 4 is connected to the elliptical head 3, and the lower part of the elliptical head 3 is connected to the flange pipe 2.

[0037] The call valve mechanism 6 includes a positioning sleeve rod 61, a fixed valve stem 62, and a call valve disc 65. A call valve seat 66 is provided at the lower part of the call valve disc 65. A call valve counterweight 64 is provided at the upper part of the call valve disc 65. Three call valve counterweights 64 are provided. The three call valve counterweights 64 are stacked. The call valve counterweights 64 can be stacked in a number according to the required opening pressure. A counterweight positioning ring 63 is provided at the upper part of the call valve counterweight 64. The counterweight positioning ring 63 positions the call valve counterweight 64. The counterweight positioning ring 63, the call valve counterweight 64, the call valve disc 65 and the sealing diaphragm are assembled with the fixed valve stem 62 through a nut 67. The assembly setting facilitates the call valve disc 65 to work with the fixed valve stem 62. The nut 67 is provided at the lower end of the call valve disc 65. The fixed valve stem 62 is slidably connected with the positioning sleeve rod 61 to facilitate the fixed valve stem 62 to move up and down in the positioning sleeve rod 61.

[0038] The upper part of the positioning sleeve rod 61 is threadedly connected to the upper bracket, and the upper bracket is set to limit the fixed valve stem 62. The lower end of the upper bracket is provided with a three-hole flange, and the three-hole flange is fixedly connected to the inside of the valve body.

[0039] The suction valve mechanism 7 includes a suction valve upper fixing 71, a suction valve sleeve rod and a suction valve fixing rod 76. The suction valve fixing rod 76 is slidably connected with the suction valve sleeve rod 78. The suction valve sleeve rod 78 is arranged inside the suction valve upper fixing 71 and connected with the suction valve upper fixing 71 through a thread. The suction valve upper fixing 71 is provided with an internal thread, and the suction valve sleeve rod 78 is provided with an external thread. A fixing ring 72 is arranged outside the suction valve upper fixing 71. The fixing ring 72 is arranged on the upper part of the suction valve counterweight 73. The suction valve counterweight 73 is arranged on the upper part of the suction valve disc 74. The suction valve seat 75 is arranged on the lower part of the suction valve disc 74. The suction valve counterweight 73, the fixing ring 72, the suction valve disc 74 and the sealing diaphragm are assembled together through the suction valve upper fixing 71 and the suction valve sleeve rod 78. The lower part of the suction valve fixing rod 76 is connected with the fixing rod bracket 77, and the end of the fixing rod bracket 77 is connected to the inside of the valve body.

[0040] The edges of the suction valve disc 74 and the exhalation valve disc 65 are both provided with folded edges 8, and a longitudinal cutout of a certain angle is designed at the folded edge 8. One side of the cutout is turned outward at a certain angle to form a triangular or rectangular notch turned outward, so that the folded edge of the valve disc has a circle turned outward in the circumferential direction. The folded edge 8 is provided to facilitate the reverse force generated when the gas flows in and out, so that the valve cover rotates.

[0041] The fixed valve stem 62 and the suction valve fixed stem 76 are both arranged as spiral structures, and the edges and corners on the spiral grooves can scrape the inner walls of the positioning sleeve rod 61 and the suction valve sleeve rod to remove the dirt attached to the inner walls of the positioning sleeve rod 61 and the suction valve sleeve rod, thereby ensuring the normal opening and closing of the exhalation valve and the suction valve. The spiral directions of the suction valve fixed stem 76 and the fixed valve stem 62 should match the directions of the edges and corners folded at the folded edge 8 of the valve disc edge, so that the spiral edges and corners of the valve stem can scrape the dirt on the inner wall of the sleeve rod in the rotation direction.

[0042] Spring coils 9 are provided on both the exhalation valve disc 65 and the suction valve disc 74. The spring coils 9 are arranged in the grooves in the valve discs. The position where the valve cover collides with the valve seat is designed with a groove of appropriate depth. The spring coils 9 are installed in the grooves of the valve cover. When the valve cover falls back quickly, the spring is compressed, and a buffer is formed when the valve cover contacts the valve seat, which plays a role in shock absorption and collision prevention, and can reduce damage to the valve seat and the sealing diaphragm.

[0043] The spring coil 9 is composed of a jacket 91 and a metal sheet spring 92. The metal sheet spring 92 is arranged inside the jacket 91. The cross section of the jacket 91 matches the structure of the metal sheet spring 92. The jacket 91 is made of polymer material. Polymer materials such as PTFE have a low friction coefficient and good self-lubricating properties. Using it as the jacket 91 that wraps the spring can maintain a low wear rate during the friction process and extend the service life of the spring coil 9. The cross section of the jacket 91 is a thin-walled V-shaped with two openings facing each other, matching two V-shaped stainless steel springs.

[0044] The spring ring 9 can also be designed in a variety of different forms, such as Figure 7 The cross section of the jacket 91 shown is a thin-walled U-shaped with two openings facing each other, matching two U-shaped stainless steel springs; Figure 8 The cross section of the jacket 91 shown is a thin-walled rectangle, matching the elliptical thin leaf spring. In addition to the symmetrical spring ring structure, a spring ring 9 with a single opening is also possible, but the horizontality of the contact surface between the jacket 91 and the valve seat after being compressed needs to be considered when designing the size. Fig. 9 The cross section of the jacket 91 shown is a thin-walled U-shaped one, matching a V-shaped stainless steel spring; Fig.10 The cross section of the jacket 91 is a thin-walled U-shaped structure, matching the thin-sheet spring; Fig.11 The cross section of the jacket 91 shown is a thin-walled U-shaped one, which matches the V-shaped stainless steel spring. Fig. 9 The difference is that the stainless steel spring has a different inclination angle of the lip. The U-shaped spring and the thin-sheet spring with the lip inclined inward are less likely to damage the jacket 91, which is conducive to increasing the service life.

[0045] During specific use, when the breathing valve is opened by positive pressure, the call valve disc 65 is separated from the call valve seat 66. Under the action of gas pressure, the call valve disc 65 moves upward, and the overpressure gas flows out from the discharge port, and flows out along the outward folded corners at the edge fold 8 of the call valve disc 65, so that the call valve disc 65 can rotate in the opposite direction as the gas flows out during the rising process. In this way, the fixed valve stem 62 on the call valve disc 65 also moves up and rotates with the call valve disc 65, and the edges and corners on the spiral groove of the fixed valve stem 62 can scrape the inner wall of the positioning sleeve rod 61, taking away the dirt attached to the inner wall of the positioning sleeve rod 61, thereby ensuring the normal opening and closing of the call valve.

[0046] When the breathing valve is opened by negative pressure, the suction valve disc 74 moves upward under the action of gas pressure, and the suction valve disc 74 is separated from the suction valve seat 75. External gas flows from the valve port to the inside of the storage tank, and flows in along the outward folded corners at the edge fold 8 of the suction valve disc 74, so that the suction valve disc 74 can rotate with the inflow of gas during the rising process. In this way, the suction valve sleeve rod 78 also moves up and rotates with the suction valve disc 74, and the spiral groove and its edges and corners on the suction valve fixing rod 76 can scrape the inner wall of the suction valve sleeve rod 78, taking away the dirt attached to the inner wall of the suction valve sleeve rod 78, thereby ensuring the normal opening and closing of the suction valve.

[0047] When the valve disc is opened, the gas flows out along the notch at the edge of the valve disc fold 8, driving the valve disc to rotate, and the relative position of the valve disc and the valve seat changes, which prevents the valve disc and the valve seat from sticking together due to dirt when the valve disc falls back to its original position. Each time the valve disc is opened, it can rotate a certain angle and then fall back, so that the relative position of the valve disc and the valve seat keeps changing, which helps to promote the shedding of dirt and avoid adhesion, and plays a certain self-cleaning role at the contact point between the valve disc and the valve seat.

[0048] Therefore, the present invention adopts the above-mentioned self-cleaning-shock-absorbing and anti-collision breathing valve structure. The present invention realizes the integration of the two functions of cleaning and shock-absorbing and anti-collision of the breathing valve structure, reduces the clogging of the sleeve rod, and reduces the wear of the valve seat sealing surface, thereby ensuring the long-term reliability of the breathing valve. The present invention solves the problems of sleeve rod clogging and valve disc valve seat adhesion by setting the valve disc and valve stem. The edges and corners on the spiral groove of the valve stem can scrape the inner wall of the positioning sleeve rod, remove the dirt attached to the inner wall of the positioning sleeve rod, clean the positioning sleeve rod, and ensure the normal opening and closing of the breathing valve. The present invention forms a buffer when the valve cover contacts the valve seat through the setting of the spring coil, which plays a role of shock absorption and anti-collision, and can reduce damage to the valve seat and the sealing diaphragm.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. The self-cleaning, shock-absorbing and anti-collision breathing valve structure is characterized by: The exhalation valve mechanism and the suction valve mechanism, the suction valve mechanism is arranged at the lower part of the exhalation valve mechanism, the exhalation valve mechanism includes a fixed valve stem and an exhalation valve disc, the exhalation valve disc and the fixed valve stem are assembled by a nut, and the fixed valve stem is arranged as a spiral structure; the suction valve mechanism includes a suction valve fixing rod and a suction valve disc, the edges of the suction valve disc and the exhalation valve disc are both provided with folded edges, the folded edges are provided with notches, and the direction of the notch folded at the folded edges matches the spiral direction of the suction valve fixing rod and the fixed valve stem.

2. The self-cleaning, shock-absorbing and collision-proof breathing valve structure according to claim 1 is characterized in that: There are multiple notches, and the notches are arranged in a triangular structure or a rectangular structure.

3. The self-cleaning, shock-absorbing and collision-proof breathing valve structure according to claim 2 is characterized in that: The exhalation valve disc and the suction valve disc are both provided with spring rings, the spring rings are composed of a jacket and a metal sheet spring, the metal sheet spring is arranged inside the jacket, and the cross section of the jacket matches the structure of the metal sheet spring.

4. The self-cleaning, shock-absorbing and anti-collision breathing valve structure according to claim 3 is characterized in that: The cross-sectional structure of the jacket is any one of a V-shaped structure, a U-shaped structure, and a rectangular structure.

5. The self-cleaning, shock-absorbing and collision-proof breathing valve structure according to claim 4 is characterized in that: The suction valve fixing rod is slidably connected to the suction valve sleeve rod, the suction valve sleeve rod is arranged inside the suction valve and fixedly connected to the suction valve through a thread, a fixing ring is arranged outside the suction valve, the fixing ring is arranged on the upper part of the suction valve counterweight, the suction valve counterweight is arranged on the upper part of the suction valve disc, and a suction valve seat is arranged on the lower part of the suction valve disc.

6. The self-cleaning, shock-absorbing and collision-proof breathing valve structure according to claim 5 is characterized in that: The lower part of the suction valve fixing rod is connected to the fixing bracket, and the end of the fixing bracket is connected to the inside of the valve body.

7. The self-cleaning, shock-absorbing and collision-proof breathing valve structure according to claim 6 is characterized in that: A call valve counterweight is arranged on the upper part of the call valve disc, a counterweight positioning ring is arranged on the upper part of the call valve counterweight, the counterweight positioning ring and the call valve counterweight are connected to the fixed valve stem, and the fixed valve stem is slidably connected to the positioning sleeve rod.

8. The self-cleaning, shock-absorbing and collision-proof breathing valve structure according to claim 6 is characterized in that: The upper part of the positioning sleeve rod is threadedly connected to the upper bracket, and the lower end of the upper bracket is provided with a three-hole flange, and the three-hole flange is fixedly connected to the inside of the valve body.

9. The self-cleaning, shock-absorbing and collision-proof breathing valve structure according to claim 8 is characterized in that: A rain cover is arranged outside the positioning sleeve rod, an outer cylinder is arranged below the rain cover, the lower part of the outer cylinder is connected to an elliptical seal head, and the lower part of the elliptical seal head is connected to a flange pipe.

Images