A swing-type pressure relief valve

Abstract

The application provides a swing-type pressure release valve, which comprises a base, a swing-type valve disc rotatably arranged at a discharge opening of the base, a spring force applying mechanism with a fixed end arranged above a base plate of the base and a force applying end rotatably and slidably connected with the swing-type valve disc, and a valve disc linkage mechanism connected with the base, the spring force applying mechanism and the swing-type valve disc respectively. The application can pull the lower spring seat to slide towards the swing-type valve disc, and then force the lower spring seat to slide when the swing-type valve disc rotates, so as to prevent the spring force applying mechanism from being stuck due to the swing-type valve disc being opened too fast, and solve the problem that the valve disc may be stuck to cause the pressure to be not released in time when the existing pressure release valve is opened.

Description

Technical Field

[0001] This invention relates to the field of power equipment technology, and more specifically, to a swing-type pressure relief valve. Background Technology

[0002] Pressure relief valves are crucial safety devices on high-voltage transformers. With changing demands, swing pressure relief valves have gradually emerged. However, unlike pressure relief valves where the valve disc rises vertically, swing pressure relief valves open by rotating the valve disc. Swing pressure relief valves use a lower spring seat connected to rollers that slide in a groove to open. Considering that the rollers in the groove may not slide down in time when the valve disc first begins to move, there is a risk of the valve disc getting stuck when opening. Summary of the Invention

[0003] In view of this, the present invention proposes a swing-type pressure relief valve, which aims to solve the problem that the valve disc may get stuck when the existing pressure relief valve is opened, thus preventing timely pressure relief.

[0004] This invention proposes a swing-type pressure relief valve, comprising: a base; a swing-type valve disc rotatably disposed at the discharge port of the base; a spring-applying mechanism, with its fixed end disposed above the base plate and its applying end rotatably and slidably connected to the swing-type valve disc, for sliding relative to the swing-type valve disc towards the swing-type valve disc when the swing-type valve disc is rotated open, and compressing and deforming to apply a restoring force to the swing-type valve disc, so that the swing-type valve disc can be reset to the discharge port sealing position; and a valve disc linkage mechanism connected to the base, the spring-applying mechanism, and the swing-type valve disc respectively, for pulling the applying end of the spring-applying mechanism towards the swing-type valve disc when the swing-type valve disc is rotated open.

[0005] Furthermore, in the aforementioned swing-type pressure relief valve, the valve disc linkage mechanism includes: a pressure shaft, disposed on the swing-type valve disc, with the pressure shaft and the force-applying end of the spring force-applying mechanism respectively disposed on opposite sides of the rotation axis of the swing-type valve disc; a fixing buckle, located on the side of the pressure shaft facing away from the swing-type valve disc, and the fixing buckle being located on the upper side of the pressure shaft; and a taut connecting rope, with both ends connected to the force-applying end of the spring force-applying mechanism and the fixing buckle respectively, the connecting rope extending from the force-applying end of the spring force-applying mechanism toward the rotation axis of the swing-type valve disc and from the swing-type valve disc... After passing over the upper side of the rotating shaft, the connecting rope passes through the gap between the rotating shaft of the swing valve disc and the pressure shaft, and extends upward from the lower side of the pressure shaft and then downward into the fixed lock to connect to the fixed lock. When the swing valve disc is rotated open, the pressure shaft rotates around the rotating shaft of the swing valve disc, so that the distance between the pressure shaft and the fixed lock gradually increases, forcing the end of the connecting rope connected to the spring force mechanism to gradually move towards the rotating shaft of the swing valve disc, so as to pull the force-applying end of the spring force mechanism to slide towards the rotating shaft of the swing valve disc.

[0006] Furthermore, in the aforementioned swing-type pressure relief valve, a valve disc bracket is provided on the base for supporting the fixed latch and for rotating the swing-type valve disc.

[0007] Furthermore, in the aforementioned swing pressure relief valve, the swing valve disc is also connected to a signal mechanism, which is used to issue an action signal and a mechanical action signal when the swing valve disc is rotated open.

[0008] Furthermore, in the aforementioned swing-type pressure relief valve, the signal mechanism includes: a limit switch disposed on one side of the swing-type valve disc; a signal cam located between the limit switch and the swing-type valve disc, and the signal cam is rotatably disposed on the base, and the signal cam is also connected to the swing-type valve disc, for use when the swing-type valve disc is rotated open, the signal cam rotates synchronously to trigger the contact of the limit switch, causing the limit switch to issue an action signal; a signal rod disposed on the same side of the signal cam, and the trigger end of the signal rod is in abutting contact with the signal cam; and a signal handle rotatably disposed on the side of the signal rod facing away from the signal cam, the rotation of the signal cam can push the signal rod to perform linear motion, so that the signal rod pushes the signal handle to rotate to the action position, as a mechanical action signal indicating that the swing-type valve disc is in the open state.

[0009] Furthermore, in the aforementioned swing-type pressure relief valve, the signal cam has a trigger arc portion and a non-trigger arc portion, and a transition arc portion is provided between the trigger arc portion and the non-trigger arc portion. The distance from the trigger arc portion to the rotation axis of the signal cam is greater than the distance from the non-trigger arc portion to the rotation axis of the signal cam, so that the trigger arc portion can rotate to one side of the limit switch to press the contact of the limit switch and realize the triggering of the limit switch.

[0010] Furthermore, in the aforementioned swing-type pressure relief valve, the signal cam is provided with a mechanical pushing part. The mechanical pushing part has a limiting surface and a mechanical signal pressing surface set at an angle, and there is an arc transition surface between the limiting surface and the mechanical signal pressing surface. When the swing-type valve disc is in the vent sealing position, the limiting surface is in a vertical state, used to limit the trigger end of the signal rod. The signal handle is in a vertical non-triggering position. The mechanical pushing part and the signal cam can rotate synchronously with the swing-type valve disc. During the rotation and opening of the swing-type valve disc, the trigger end of the signal rod presses against the arc transition surface, gradually pushing the signal rod to move linearly away from the signal cam, and gradually pushing the signal handle to rotate until the swing-type valve disc is fully opened. The trigger end of the signal rod presses against the mechanical signal pressing surface, and the signal handle rotates to the tilt triggering position as a mechanical action signal.

[0011] Furthermore, the aforementioned swing-type pressure relief valve also has an integrated exhaust mechanism on its base for discharging any gas that has not been discharged from the transformer.

[0012] Furthermore, in the aforementioned swing-type pressure relief valve, the integrated venting mechanism includes: a venting seat assembly disposed on the bottom wall of the base plate facing away from the swing-type valve disc, and the venting seat assembly having a plurality of vent pipes for extending into corresponding oil inlets to vent unvented gas from the transformer; a venting nozzle assembly disposed inside the base, the base plate of the base having a venting channel, the side plate of the base having a venting port, the inlet of the venting channel being connected to the venting seat assembly, the outlet of the venting channel being connected to the inlet of the venting nozzle assembly, and the outlet of the venting nozzle assembly extending into the venting port; and a detachable venting cover plate disposed at the venting port for venting gas.

[0013] Furthermore, in the aforementioned swing-type pressure relief valve, the exhaust nozzle assembly includes: a nozzle and an exhaust plug disposed at the nozzle outlet.

[0014] The swing pressure relief valve provided by the present invention can pull the lower spring seat to slide towards the swing valve disc, thereby forcing the lower spring seat to slide when the swing valve disc rotates, preventing the spring force application mechanism from getting stuck due to the swing valve disc opening too quickly, thus solving the problem that the valve disc may get stuck when the existing pressure relief valve is opened, resulting in the inability to release pressure in time.

[0015] Furthermore, when the swing valve disc is rotated open, the signal mechanism sends an action signal and a mechanical action signal. In particular, since the swing valve disc is equipped with a signal cam that moves in sync with it, it can promptly send signals to the limit switch and the signal rod when it is opened.

[0016] Furthermore, the integrated exhaust mechanism removes the gas that has not been discharged from the transformer, allowing the gas at each oil inlet to be emptied as much as possible. In particular, the multiple air inlets can better meet the exhaust needs of the multi-disc valve. Attached Figure Description

[0017] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This is a schematic diagram of the structure of the swing pressure relief valve provided in an embodiment of the present invention; Figure 2 This is a cross-sectional view of the swing pressure relief valve at the valve disc linkage mechanism provided in an embodiment of the present invention; Figure 3 This is a cross-sectional view of the swing pressure relief valve at the signal mechanism provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the signal cam provided in an embodiment of the present invention; Figure 5 This is a cross-sectional view of the swing pressure relief valve at the integrated exhaust mechanism provided in an embodiment of the present invention; Figure 6 A bottom view of a swing pressure relief valve provided in an embodiment of the present invention; Explanation of reference numerals in the attached drawings: 1-Base, 11-Bottom plate, 111-Vent port, 112-Exhaust passage, 12-Side plate, 121-Exhaust port, 2-Swing valve disc, 21-Rotating shaft, 3-Spring force application mechanism, 31-Lower spring seat, 4-Valve disc linkage mechanism, 41-Pressing shaft, 42-Fixing latch, 43-Connecting rope, 5-Signal mechanism, 51-Limit switch, 52-Signal cam, 521-Trigger arc, 522-Non-Trigger arc, 523-Transition arc, 524-Mechanical pusher, 5241-Limiting surface, 5242-Mechanical signal pressing surface, 5243-Arch transition surface, 53-Signal rod, 54-Signal handle, 6-Integrated exhaust mechanism, 61-Exhaust seat assembly, 611-Exhaust pipe, 62-Exhaust nozzle assembly, 63-Exhaust cover plate. Detailed Implementation

[0018] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] See Figures 1 to 6 The figure illustrates a preferred structure of a swing pressure relief valve provided in an embodiment of the present invention. As shown, the swing pressure relief valve includes: a base 1, a swing valve disc 2, a spring-applying mechanism 3, a valve disc linkage mechanism 4, a signal mechanism 5, and an integrated venting mechanism 6; wherein, The swing valve disc 2 is rotatably mounted at the vent 111 of the base 1. Specifically, the base 1 includes a base plate 11 and side plates 12 arranged along the outer edge of the base plate 11. The base plate 11 is provided with a plurality of vents 111. The swing valve disc 2 is rotatably mounted at the vent 111 of the base 1. When the internal pressure of the transformer is too high, the swing valve disc 2 can be pressed against it, so that the swing valve disc 2 can be rotated open to release the pressure.

[0020] The fixed end of the spring force application mechanism 3 (such as...) Figure 1 The upper left end (as shown) is positioned above the base plate 11 of the base 1, and the force-applying end (such as...) Figure 2 The lower left end (as shown) is connected to the swing valve disc 2 in a rotatable and slidable manner, so that when the swing valve disc 2 is rotated open, the force-applying end of the spring force-applying mechanism 3 can slide relative to the swing valve disc 2 towards the swing valve disc 2 (e.g., Figure 2(As shown, slide to the right), and compress and deform to apply a restoring force to the swing valve disc 2, so that the swing valve disc 2 can be restored to the vent sealing position (as shown). Figure 2 (At the location shown).

[0021] Specifically, the fixed end of the elastic force application mechanism 3 (such as...) Figure 1 The top end (as shown) is positioned above the base plate 11 of the base 1. The force-applying end may be provided with a lower spring seat 31. The lower spring seat 31 and the swing valve disc 2 are rotatable and along the length direction of the swing valve disc 2 (e.g., Figure 2 The two valves (shown horizontally) are connected in a sliding manner. The lower spring seat 31 applies elastic pressure to the swing valve disc 2 so that the swing valve disc 2 can seal at the vent 111, thus sealing the vent 111. When the swing valve disc 2 is in the sealed position, the lower spring seat 31 is located at the left sliding end of the swing valve disc 2, allowing the elastic force application mechanism 3 to be arranged at its maximum angle above the swing valve disc 2. The pressure of the oil and gas in the oil chamber acting on the swing valve disc 2 relative to the rotation axis of the swing valve disc 2 forms an opening torque. The pressure of the elastic force application mechanism 3 acting on the swing valve disc 2 relative to the rotation axis of the swing valve disc 2 forms an opening torque. The moving shaft generates a resistance torque; when the opening torque is greater than the resistance torque, the swing valve disc 2 rotates open from the sealed position at the vent 111 to release oil and gas. As the opening angle increases, the force-applying end of the elastic force-applying mechanism 3 slides from a position away from the rotation axis of the swing valve disc 2 to a position closer to the rotation axis of the swing valve disc 2, causing the resistance torque to gradually decrease, thereby gradually reducing the opening resistance of the swing valve disc 2 until the swing valve disc 2 rotates to the open position. In the open position, the force-applying end of the elastic force-applying mechanism 3 slides along the swing valve disc 2 to the right sliding end position, which can be approximately vertically set on one side of the swing valve disc 2 (e.g., Figure 2 (As shown on the right). The fixed end of the elastic force-applying mechanism 3 can be hinged to the side plate of the base 1. The lower spring seat 31 is connected to the swing valve disc 2 in a rotatable and slidable manner, which can apply elastic resistance to the swing valve disc 2 and prevent the swing valve disc 2 from opening and rotating. As the swing valve disc 2 rotates, the force-applying end of the elastic force-applying mechanism 3 can slide. Especially in the sealed state, the distance between the lower spring seat 31 and the rotation axis of the swing valve disc 2 is the farthest. As the swing valve disc 2 opens and rotates, the force-applying end of the elastic force-applying mechanism 3 gradually slides closer to the rotation axis of the swing valve disc 2, so that the resistance torque applied by the elastic force-applying mechanism 3 gradually decreases, which is conducive to the opening of the pressure relief valve.

[0022] The valve disc linkage mechanism 4 is connected to the base 1, the spring force application mechanism 3, and the swing valve disc 2, respectively. It is used to pull the force application end of the spring force application mechanism 3 towards the swing valve disc 2 when the swing valve disc 2 is rotated open. Specifically, the fixed end of the valve disc linkage mechanism 4 is connected to the base 1, the force application end of the valve disc linkage mechanism 4 is connected to the lower spring seat 31, and the valve disc linkage mechanism 4 is also connected to the swing valve disc 2. When the swing valve disc 2 is rotated open, a force is applied to the valve disc linkage mechanism 4, causing it to pull the lower spring seat 31 towards the swing valve disc 2. This forces the lower spring seat 31 to slide when the swing valve disc 2 rotates, preventing the spring force application mechanism 3 from jamming due to the swing valve disc 2 opening too quickly.

[0023] The swing valve disc 2 is also connected to a signal mechanism 5, which is used to issue action signals and mechanical action signals when the swing valve disc 2 is rotated open. Specifically, the signal mechanism 5 can be installed on the base 1. When the swing valve disc 2 is opened, the swing valve disc 2 triggers the signal mechanism 5, causing the signal mechanism 5 to issue action signals and mechanical action signals for fault alarm.

[0024] The base 1 is also equipped with an integrated venting mechanism 6, which is used to discharge any gas that has not been discharged from the transformer. Specifically, the integrated venting mechanism 6 ensures that the gas located at each oil inlet is vented as much as possible.

[0025] See also Figure 1 and Figure 2 The valve disc linkage mechanism 4 includes: a pressure shaft 41, a fixing buckle 42, and a connecting rope 43; wherein, the pressure shaft 41 is mounted on the swing valve disc 2, and the pressure shaft 41 and the force-applying end of the spring force-applying mechanism 3 are respectively located on both sides of the rotation shaft 21 of the swing valve disc 2; the fixing buckle 42 is located on the side of the pressure shaft 41 facing away from the swing valve disc 2, and the fixing buckle 42 is located on the upper side of the pressure shaft 41; the connecting rope 43 is in a taut state, and its two ends are respectively connected to the force-applying end of the spring force-applying mechanism 3 and the fixing buckle 42, and the connecting rope 43 extends from the force-applying end of the spring force-applying mechanism 3 to the rotation shaft 21 of the swing valve disc 2 and from the swing valve disc 2... After passing over the upper side of the rotating shaft 21, the connecting rope 43 passes through the gap between the rotating shaft 21 of the rotary valve disc 2 and the pressure shaft 41, and extends upward from the lower side of the pressure shaft 41 and then downward to the fixed lock 42 to connect to the fixed lock 42; when the rotary valve disc 2 is rotated open, the pressure shaft 41 rotates around the rotating shaft 21 of the rotary valve disc 2, so that the distance between the pressure shaft 41 and the fixed lock 42 gradually increases, so as to force the end of the connecting rope 43 connected to the spring force mechanism 3 to gradually move towards the rotating shaft 21 of the rotary valve disc 2, so as to pull the force-applying end of the spring force mechanism 3 to slide towards the rotating shaft 21 of the rotary valve disc 2.

[0026] Specifically, the pressure spool 41 is mounted on the swing valve disc 2 via a bracket, and the pressure spool 41 and the lower spring seat 31 are respectively positioned on the left and right sides of the rotation shaft 21 of the swing valve disc 2 (relative to the left and right sides of the rotation shaft 21 of the swing valve disc 2). Figure 2 (As shown in the diagram), the pressure shaft 41 is also arranged parallel to the rotation shaft 21 of the swing valve disc 2, and can rotate synchronously with the swing valve disc 2 around the rotation shaft 21 in a seesaw manner. Therefore, when the swing valve disc 2 rotates clockwise, it is opened, that is, when it rotates to the upper right, the pressure shaft 41 rotates clockwise accordingly, and can rotate to the lower left. In this embodiment, the base 1 is provided with a valve disc bracket 7, which is used to support the fixing latch 42 and also to provide rotational support for the swing valve disc 2. The valve disc bracket 7 may have two bracket parts, which respectively provide rotational support for the rotation shaft 21 of the swing valve disc 2, and can also support the fixing latch 42, so that the opening of the fixing latch 42 faces towards Figure 2 The arrangement is shown on the upper left side. There can be two connecting ropes 43, with the first ends of the two connecting ropes 43 (as shown) Figure 2 The left end of the connecting rope 43 passes through and connects to the force-applying end of the spring force-applying mechanism 3. For example, the bottom of the lower spring seat 31 may have two ear holes. The first ends of the two connecting ropes 43 pass through the two ear holes respectively and are connected as a single structure. The two connecting ropes 43 extend to the right from the first end, that is, towards the rotating shaft 21 of the rotary valve disc 2. After passing over the upper side of the rotating shaft 21 of the rotary valve disc 2, they extend downward from the gap between the rotating shaft 21 of the rotary valve disc 2 and the pressure shaft 41 to the lower side of the pressure shaft 41. After passing over the lower side of the pressure shaft 41, they extend upward and to the fixed latch 42, and then extend downward from the opening of the fixed latch 42 to the inside of the fixed latch 42 for locking. The connecting rope 43 is a non-elastic rope.

[0027] Therefore, when the swing valve disc 2 is rotated open, the pressure shaft 41 rotates clockwise and to the lower left, which in turn presses the connecting rope 43 to move accordingly. This increases the distance between the position of the connecting rope 43 below the pressure shaft 41 and the end fixedly connected to the locking buckle 42, thus lengthening the part of the connecting rope 43 on the right side. This forces the connecting rope 43 to pull the lower spring seat 31 to slide to the right. In particular, if the lower spring seat 31 cannot roll along the slide groove in time, the pressure shaft 41 rotates with the swing valve disc 2, which in turn moves the steel wire rope 6 passing below it downwards, forcibly pulling the lower spring seat 31 and causing the roller on the lower spring seat 31 to slide along the slide groove, forming a linkage mechanism to help the swing valve disc 2 operate smoothly.

[0028] See also Figure 3 The signal mechanism 5 includes: a limit switch 51, a signal cam 52, a signal rod 53, and a signal handle 54; wherein, the limit switch 51 is located on one side of the swing valve disc 2 (e.g., Figure 3 (As shown on the right); the signal cam 52 is located between the limit switch 51 and the swing valve disc 2, and the signal cam 52 is rotatably mounted on the base 1. The signal cam 52 is also connected to the swing valve disc 2, so that when the swing valve disc 2 is rotated open, the signal cam 52 rotates synchronously to trigger the contacts of the limit switch 51, causing the limit switch 51 to send an action signal; the signal rod 53 and the limit switch 51 are located on the same side of the signal cam 52 (e.g., on the right side). Figure 3 (as shown on the right), and the trigger end of signal rod 53 (as shown on the right). Figure 3 The left end shown is in a pressing contact with the signal cam 52; the signal handle 54 is rotatably positioned on the side of the signal rod 53 facing away from the signal cam 52 (e.g., the left end shown). Figure 3 (As shown on the right), the rotation of the signal cam 52 can drive the signal rod 53 to move linearly, so that the signal rod 53 pushes the signal handle 54 to rotate to the action position, so as to indicate that the swing valve disc 2 is in the open state as a mechanical action signal.

[0029] Specifically, the signal cam 52 is fixedly connected to the swing valve disc 2. As the swing valve disc 2 rotates around the rotation axis 21 of the swing valve disc 2, that is, the signal cam 52 is coaxially arranged with the swing valve disc 2. When the swing valve disc 2 is opened, on the one hand, the rotation of the signal cam 52 can push the limit switch 51, which is a driven member, to translate, that is, push the limit switch 51 to be triggered. On the other hand, the signal cam 52 can push the signal rod 53, which is a driven member, to translate, thereby causing the signal handle 54 to rotate around its fixed pin, so as to serve as a mechanical trigger signal and realize visual prompting.

[0030] In this embodiment, the signal cam 52 has a trigger arc portion 521 and a non-trigger arc portion 522, and a transition arc portion 523 is provided between the trigger arc portion 521 and the non-trigger arc portion 522. The distance from the trigger arc portion 521 to the rotation axis of the signal cam 52 is greater than the distance from the non-trigger arc portion 522 to the rotation axis of the signal cam 52, so that the trigger arc portion 521 can rotate to one side of the limit switch 51 to press the contact of the limit switch 51 and realize the triggering of the limit switch 51.

[0031] See also Figure 3 and Figure 4The signal cam 52 is provided with a mechanical pusher 524, which has a limiting surface 5241 and a mechanical signal pressing surface 5242 set at an angle. An arc transition surface 5243 is formed between the limiting surface 5241 and the mechanical signal pressing surface 5242. When the swing valve disc 2 is in the vent sealing position, the limiting surface 5241 is in a vertical state, used to limit the trigger end of the signal rod 53, and the signal handle 54 is in a vertical non-triggering position. The mechanical pusher 524 and the signal cam... Wheel 52 can rotate synchronously with the swing valve disc 2. During the rotation and opening of the swing valve disc 2, the trigger end of the signal rod 53 presses against the arc transition surface 5243, gradually pushing the signal rod 53 to move linearly away from the signal cam 52, and pushing the signal handle 54 to rotate gradually until the swing valve disc 2 is fully opened. The trigger end of the signal rod 53 presses against the mechanical signal pressing surface 5242, and the signal handle 54 rotates to the tilt trigger position as a mechanical action signal.

[0032] See also Figure 5 and Figure 6 The integrated exhaust mechanism 6 includes: an exhaust seat assembly 61, an exhaust nozzle assembly 62, and an exhaust cover plate 63. The exhaust seat assembly 61 is mounted on the bottom wall of the base plate 11 of the base 1, facing away from the swing valve disc 2. The exhaust seat assembly 61 has several exhaust pipes 611, which extend into corresponding oil inlets to discharge any undischarged gas inside the transformer. The exhaust nozzle assembly 62 is located inside the base 1. The base plate 11 of the base 1 has an exhaust channel 112, and the side plate 12 of the base 1 has an exhaust port 121. The inlet of the exhaust channel 112 is connected to the exhaust seat assembly 61, and the outlet of the exhaust channel 112 is connected to the inlet of the exhaust nozzle assembly 62. The outlet of the exhaust nozzle assembly 62 extends into the exhaust port. The exhaust cover plate 63 is detachably mounted at the exhaust port for discharging gas.

[0033] Specifically, the four exhaust pipes 611 extending to the four oil inlets and the screw plug together constitute the exhaust seat assembly 61. The four exhaust pipes 611 are connected to the vent screw plug, and the other end of the screw plug is connected to the exhaust flow channel 112 inside the base 1. The internal air can enter through the exhaust seat assembly 61 and flow through the internal air channel of the base 1 to reach the exhaust nozzle assembly 62. The exhaust nozzle assembly 62 includes a nozzle and an exhaust screw plug set at the nozzle outlet, that is, it is composed of a screw plug and an L-shaped nozzle. Gas can enter the screw plug through the exhaust flow channel 112 inside the base 1 and flow out through the nozzle. The nozzle can be blocked by the screw plug. The side plate 12 of the base 1 is provided with an exhaust port 121. Gas can be discharged to the outside of the valve through the exhaust port 121. The exhaust cover plate 63 can be sealed with bolts.

[0034] In summary, the swing pressure relief valve provided in this embodiment can pull the lower spring seat 31 to slide towards the swing valve disc 2, thereby forcing the lower spring seat 31 to slide when the swing valve disc 2 rotates. This prevents the spring force application mechanism 3 from getting stuck due to the swing valve disc 2 opening too quickly, thus solving the problem that the valve disc may get stuck when the existing pressure relief valve is opened, resulting in the inability to release pressure in time.

[0035] Furthermore, when the swing valve disc 2 is rotated open, an action signal and a mechanical action signal are issued through the signal mechanism. In particular, since the swing valve disc 2 is equipped with a signal cam 52 that moves in sync with it, it can promptly send signals to the limit switch 51 and the signal rod 53 when it is opened.

[0036] Furthermore, the integrated exhaust mechanism 6 discharges the gas that has not been discharged from the transformer, allowing the gas located at each oil inlet to be emptied as much as possible. In particular, with multiple air inlets, it can better meet the exhaust needs of the multi-disc large valve.

[0037] It should be noted that in the description of this invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc., which indicate directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and is not intended to indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0038] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0039] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A swing-type pressure relief valve, characterized in that, include: Base; A swing valve disc is rotatably mounted at the discharge port of the base; A spring-applying mechanism has a fixed end located above the base plate and an application end connected to the swing valve disc in a rotatable and slidable manner. When the swing valve disc is rotated open, the application end of the spring-applying mechanism can slide relative to the swing valve disc towards the swing valve disc and compress and deform to apply a restoring force to the swing valve disc, so that the swing valve disc can be reset to the vent sealing position. The valve disc linkage mechanism is connected to the base, the spring force application mechanism, and the swing valve disc respectively, and is used to pull the force application end of the spring force application mechanism to slide towards the swing valve disc when the swing valve disc is rotated open. The valve disc linkage mechanism includes: A pressure shaft is provided on the swing valve disc, and the pressure shaft and the force-applying end of the spring force-applying mechanism are respectively provided on both sides of the rotation shaft of the swing valve disc; A locking buckle is placed on the side of the pressure shaft facing away from the rotary valve disc, and the locking buckle is located on the upper side of the pressure shaft; The taut connecting rope is connected at both ends to the force-applying end of the spring force-applying mechanism and the fixing buckle, respectively. The connecting rope extends from the force-applying end of the spring force-applying mechanism toward the rotation axis of the swing valve disc and passes over the upper side of the rotation axis of the swing valve disc. Then, the connecting rope passes through the gap between the rotation axis of the swing valve disc and the pressure shaft, and extends upward from the lower side of the pressure shaft and then downward into the fixing buckle to connect to the fixing buckle. When the swing valve disc is rotated open, the pressure shaft rotates around the rotation axis of the swing valve disc, causing the distance between the pressure shaft and the fixing buckle to gradually increase. This forces the end of the connecting rope connected to the spring force-applying mechanism to gradually move toward the rotation axis of the swing valve disc, thereby pulling the force-applying end of the spring force-applying mechanism to slide toward the rotation axis of the swing valve disc.

2. The swing pressure relief valve according to claim 1, characterized in that, The base is provided with a valve disc bracket, which is used to support the fixed latch and to provide rotational support for the swing valve disc.

3. The swing pressure relief valve according to claim 1 or 2, characterized in that, The swing valve disc is also connected to a signal mechanism, which is used to send action signals and mechanical action signals when the swing valve disc is rotated open.

4. The swing pressure relief valve according to claim 3, characterized in that, The signal mechanism includes: A limit switch is located on one side of the rotary valve disc; A signal cam is located between the limit switch and the rotary valve disc, and the signal cam is rotatably mounted on the base. The signal cam is also connected to the rotary valve disc, and is used to rotate synchronously when the rotary valve disc is rotated open, so as to trigger the contacts of the limit switch and cause the limit switch to send an action signal. A signal rod and the limit switch are disposed on the same side of the signal cam, and the trigger end of the signal rod is in abutting contact with the signal cam; A signal handle is rotatably mounted on the side of the signal rod opposite to the signal cam. The rotation of the signal cam can push the signal rod to move linearly, so that the signal rod pushes the signal handle to rotate to the action position, thereby indicating that the rotary valve disc is in the open state as a mechanical action signal.

5. The swing pressure relief valve according to claim 4, characterized in that, The signal cam has a trigger arc and a non-trigger arc, and a transition arc is provided between the trigger arc and the non-trigger arc. The distance from the trigger arc to the rotation axis of the signal cam is greater than the distance from the non-trigger arc to the rotation axis of the signal cam, so that the trigger arc can rotate to one side of the limit switch to press the contact of the limit switch and trigger the limit switch.

6. The swing pressure relief valve according to claim 4, characterized in that, The signal cam is equipped with a mechanical pushing part, which has a limiting surface and a mechanical signal pressing surface set at an angle. There is an arc transition surface between the limiting surface and the mechanical signal pressing surface. When the swing valve disc is in the vent sealing position, the limiting surface is vertical, used to limit the trigger end of the signal rod. The signal handle is in the vertical non-triggering position. The mechanical pushing part and the signal cam can rotate synchronously with the swing valve disc. During the rotation opening of the swing valve disc, the trigger end of the signal rod presses against the arc transition surface, gradually pushing the signal rod to move linearly away from the signal cam, and gradually pushing the signal handle to rotate until the swing valve disc is fully opened. At this point, the trigger end of the signal rod presses against the mechanical signal pressing surface, and the signal handle rotates to the tilt triggering position, serving as a mechanical action signal.

7. The swing pressure relief valve according to claim 1 or 2, characterized in that, The base is also equipped with an integrated exhaust mechanism for discharging gases that have not been discharged from the transformer.

8. The swing pressure relief valve according to claim 7, characterized in that, The integrated exhaust mechanism includes: An exhaust seat assembly is provided on the bottom wall of the base plate facing away from the swing valve disc, and the exhaust seat assembly is provided with a plurality of exhaust pipes for extending into the corresponding oil inlet to discharge the gas that has not been discharged from the transformer. An exhaust nozzle assembly is disposed inside the base. The base has an exhaust channel on its bottom plate and an exhaust port on its side plate. The air inlet of the exhaust channel is connected to the exhaust nozzle assembly, and the air outlet of the exhaust channel is connected to the air inlet of the exhaust nozzle assembly. The air outlet of the exhaust nozzle assembly extends into the exhaust port. An exhaust cover is detachably installed at the exhaust port for discharging gas.

9. The swing pressure relief valve according to claim 8, characterized in that, The exhaust nozzle assembly includes a nozzle and an exhaust plug disposed at the nozzle outlet.

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