Swing type pressure relief valve

Abstract

The invention provides a swing type pressure relief valve. The swing type pressure relief valve comprises a base, a valve element and a valve element, the swing type valve disc is arranged at the discharge port of the base in a rotatable manner; the fixed end of the spring force application mechanism is arranged above the base bottom plate, and the force application end of the spring force application mechanism is connected with the swing type valve disc in a rotating and sliding mode; and the valve disc linkage mechanism is respectively connected with the base, the spring force application mechanism and the swing valve disc. The lower spring seat can be pulled to slide towards the swing type valve disc, so that the lower spring seat is forced to slide when the swing type valve disc rotates, and the spring force applying mechanism is prevented from being clamped due to too fast opening of the swing type valve disc; the problem that when an existing pressure relief valve is opened, a valve disc is possibly clamped, and pressure cannot be relieved in time is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power equipment, and in particular to a swing-type pressure relief valve. Background Art

[0002] Pressure relief valves are important safety devices on high-voltage transformers. As demand changes, swing pressure relief valves are gradually produced. However, unlike pressure relief valves with vertically rising valve discs, swing pressure relief valves are opened by rotating the valve disc. Swing pressure relief valves are opened by connecting the lower spring seat to the roller in the slideway. Considering that when the valve disc starts to move, the roller in the slideway may not slide down in time, that is, there is a risk of the valve disc getting stuck when it is opened. 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 of the existing pressure relief valve may get stuck when it is opened, resulting in failure to release pressure in time.

[0004] The present invention proposes a swing pressure relief valve, which includes: a base; a swing valve disc, which is rotatably arranged at the discharge port of the base; a spring force mechanism, a fixed end of which is arranged above the bottom plate of the base, and a force end is connected to the swing valve disc in a rotatable and slidable manner, so that when the swing valve disc is rotated to open, the force end of the spring force mechanism can slide relative to the swing valve disc in the direction of the swing valve disc, and compress and deform to apply a reset force to the swing valve disc, so that the swing valve disc can be reset to the sealing position of the discharge port; a valve disc linkage mechanism, which is respectively connected to the base, the spring force mechanism, and the swing valve disc, and is used to pull the force end of the spring force mechanism to slide in the direction of the swing valve disc when the swing valve disc is rotated to open.

[0005] Furthermore, in the above-mentioned swing pressure relief valve, the valve disc linkage mechanism includes: a wire pressing shaft, which is arranged on the swing valve disc, and the force-applying ends of the wire pressing shaft and the spring force-applying mechanism are respectively arranged on both sides of the rotating shaft of the swing valve disc; a fixed lock buckle, which is placed on the side of the wire pressing shaft facing away from the swing valve disc, and the fixed lock buckle is located on the upper side of the wire pressing shaft; a connecting rope in a taut state, whose two ends are respectively connected to the force-applying end of the spring force-applying mechanism and the fixed lock buckle, and the connecting rope extends from the force-applying end of the spring force-applying mechanism to the rotating shaft of the swing valve disc and from the swing valve disc After passing around 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 wire pressing shaft, and extends upward from the lower side of the wire pressing shaft and then extends downward into the fixed lock buckle to be connected to the fixed lock buckle; when the swing valve disc is rotated to open, the wire pressing shaft rotates around the rotating shaft of the swing valve disc, so that the distance between the wire pressing shaft and the fixed lock buckle gradually increases, so as to force the end of the connecting rope connected to the spring force applying mechanism to gradually move toward the rotating shaft of the swing valve disc, so as to pull the force applying end of the spring force applying mechanism to slide toward the rotating shaft of the swing valve disc.

[0006] Furthermore, in the above-mentioned swing pressure relief valve, a valve disc bracket is provided on the base for supporting the fixed lock buckle and for rotatably supporting the swing valve disc.

[0007] Furthermore, in the above-mentioned swing pressure relief valve, the swing valve disc is also connected to a signal mechanism for sending an action signal and a mechanical action signal when the swing valve disc rotates to open.

[0008] Furthermore, in the above-mentioned swing pressure relief valve, the signal mechanism includes: a travel switch, which is arranged on one side of the swing valve disc; a signal cam, which is located between the travel switch and the swing valve disc, and the signal cam is rotatably arranged on the base, and the signal cam is also connected to the swing valve disc, so that when the swing valve disc rotates to open, the signal cam rotates synchronously therewith to trigger the contacts of the travel switch, so that the travel switch sends an action signal; a signal rod, the signal rod and the travel switch are arranged on the same side of the signal cam, and the triggering end of the signal rod is in pressure contact with the signal cam; a signal handle, which is rotatably arranged on the side of the signal rod facing away from the signal cam, and 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, which serves as a mechanical action signal to indicate that the swing valve disc is in an open state.

[0009] Furthermore, in the above-mentioned 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, and 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 travel switch to press the contacts of the travel switch to trigger the travel switch.

[0010] Furthermore, in the above-mentioned swing pressure relief valve, a mechanical driving part is provided on the signal cam, and the mechanical driving part has a limit surface and a mechanical signal pressure surface set at an angle, and an arc transition surface is provided between the limit surface and the mechanical signal pressure surface. When the swing valve disc is in the discharge port sealing position, the limit surface is in a vertical state, which is used to limit the triggering end of the signal rod, and the signal handle is in a vertical non-triggering position. The mechanical driving part and the signal cam can rotate synchronously with the swing valve disc, so that during the rotation and opening process of the swing valve disc, the triggering end of the signal rod presses and contacts on the arc transition surface to gradually push the signal rod to move linearly in a direction away from the signal cam, and push the signal handle to rotate gradually until the swing valve disc is swung into place, the triggering end of the signal rod presses and contacts on the mechanical signal pressure surface, and the signal handle rotates to an inclined trigger position as a mechanical action signal.

[0011] Furthermore, the above-mentioned swing pressure relief valve is also provided with an integrated exhaust mechanism on the base for exhausting the unexhausted gas in the transformer.

[0012] Furthermore, in the above-mentioned swing pressure relief valve, the integrated exhaust mechanism includes: an exhaust seat assembly, which is arranged on the bottom wall of the base bottom plate facing away from the swing valve disc, and the exhaust seat assembly is provided with a plurality of exhaust pipes for respectively extending into the corresponding oil inlets to exhaust the unexhausted gas in the transformer; an exhaust nozzle assembly, which is arranged inside the base, the bottom plate of the base is provided with an exhaust flow channel, the side plate of the base is provided with an exhaust port, the air inlet of the exhaust flow channel is connected with the exhaust seat assembly, the air outlet of the exhaust flow channel is connected with the air inlet of the exhaust nozzle assembly, and the air outlet of the exhaust nozzle assembly extends into the exhaust port; an exhaust cover plate, which is detachably arranged at the exhaust port for exhausting gas.

[0013] Furthermore, in the above-mentioned swing pressure relief valve, the exhaust nozzle assembly includes: a nozzle and an exhaust screw plug arranged at the outlet of the nozzle.

[0014] The swing pressure relief valve provided by the present invention can pull the lower spring seat to slide in the direction of the swing valve disc, thereby forcing the lower spring seat to slide when the swing valve disc rotates, thereby preventing the spring force applying mechanism from getting stuck due to the swing valve disc opening too quickly, thereby 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 rotates to open, an action signal and a mechanical action signal are sent out through the signal mechanism. In particular, since the swing valve disc is equipped with a signal cam that moves synchronously with it, it can give a signal to the travel switch and the signal rod in time when it opens.

[0016] Furthermore, the unexhausted gas in the transformer is exhausted through the integrated exhaust mechanism, so that the gas at each oil inlet is exhausted as much as possible. In particular, with multiple air inlets, the exhaust needs of the multi-flap large valve can be better met. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings: Figure 1 A schematic diagram of the structure of a swing pressure relief valve provided in an embodiment of the present invention; Figure 2 A cross-sectional view of a swing pressure relief valve provided by an embodiment of the present invention at a valve disc linkage mechanism; Figure 3 A cross-sectional view of a swing pressure relief valve at a signal mechanism provided by an embodiment of the present invention; Figure 4 A schematic diagram of the structure of a signal cam provided by an embodiment of the present invention; Figure 5 A cross-sectional view of a swing pressure relief valve at an integrated exhaust mechanism provided by an embodiment of the present invention; Figure 6 A bottom view of a swing pressure relief valve provided by an embodiment of the present invention; Explanation of the accompanying drawings: 1-base, 11-bottom plate, 111-drain port, 112-exhaust flow channel, 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-wire pressing shaft, 42-fixed lock buckle, 43-connecting rope, 5-signal mechanism, 51-travel switch, 52-signal cam, 521-trigger arc portion, 522-non-trigger arc portion, 523-transition circular arc portion, 524-mechanical pushing portion, 5241-limiting surface, 5242-mechanical signal top pressure surface, 5243-circular arc 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 DESCRIPTION

[0018] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to be able to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features described in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0019] See also Figures 1 to 6 , which shows the preferred structure of the swing pressure relief valve provided by the embodiment of the present invention. As shown in the figure, the swing pressure relief valve comprises: a base 1, a swing valve disc 2, a spring force mechanism 3, a valve disc linkage mechanism 4, a signal mechanism 5 and an integrated exhaust mechanism 6; wherein, The swing valve disc 2 is rotatably arranged at the discharge port 111 of the base 1. Specifically, the base 1 includes a bottom plate 11 and a side plate 12 arranged along the outer edge of the bottom plate 11. The bottom plate 11 is provided with a plurality of discharge ports 111, and the swing valve disc 2 is rotatably arranged at the discharge port 111 of the base 1, which can press the swing valve disc 2 when the internal pressure of the transformer is too large, so that the swing valve disc 2 can be rotated to open and realize pressure discharge.

[0020] The fixed end of the spring force applying mechanism 3 (such as Figure 1 The upper left end shown in FIG. 1 is arranged above the bottom plate 11 of the base 1, and the force-applying end (such as Figure 2 The lower left end shown in the figure) is connected to the swing valve disc 2 in a rotatable and slidable manner, so that when the swing valve disc 2 is rotated to open, the force application end of the spring force application mechanism 3 can slide relative to the swing valve disc 2 in the direction of the swing valve disc 2 (such as Figure 2The swing valve disc 2 is compressed and deformed to apply a restoring force to the swing valve disc 2, so that the swing valve disc 2 can be restored to the discharge port sealing position (as shown in FIG. Figure 2 shown in the position).

[0021] Specifically, the fixed end of the elastic force applying mechanism 3 (such as Figure 1 The top end shown in the figure is arranged above the bottom plate 11 of the base 1, and the force-applying end may be provided with a lower spring seat 31, and the lower spring seat 31 and the swing valve disc 2 are rotatable and extend along the length direction of the swing valve disc 2 (such as Figure 2 The lower spring seat 31 is used to apply elastic pressure to the swing valve disc 2 so that the swing valve disc 2 can be sealed at the discharge port 111 to achieve the sealing of the discharge port 111. When the swing valve disc 2 is in the sealing position, the lower spring seat 31 is located at the left sliding end position of the swing valve disc 2, so that the elastic force applying mechanism 3 can be arranged above the swing valve disc 2 with the maximum tilt; the pressure of the oil and gas in the oil chamber acting on the swing valve disc 2 forms an opening torque relative to the rotating shaft of the swing valve disc 2, and the pressure of the elastic force applying mechanism 3 on the swing valve disc 2 is relative to the rotating shaft of the swing valve disc 2. The moving shaft forms a resistance torque; when the opening torque is greater than the resistance torque, the swing valve disc 2 rotates and opens from the sealing position at the discharge port 111 to discharge oil and gas, and as the opening angle increases, the force-applying end of the elastic force-applying mechanism 3 slides from a position away from the rotating axis of the swing valve disc 2 to a position close to the rotating axis of the swing valve disc 2, so that the resistance torque is gradually reduced, and then the opening resistance of the swing valve disc 2 is gradually reduced 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, and can be approximately vertically arranged on one side of the swing valve disc 2 (such as Figure 2 The right side shown). The fixed end of the elastic force-applying mechanism 3 can be hinged on the side plate of the base 1, and the lower spring seat 31 is connected to the swing valve disc 2 in a rotatable and slidable manner, and can apply elastic resistance to the swing valve disc 2 to 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 to a position close 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 release valve.

[0022] The valve disc linkage mechanism 4 is respectively connected to the base 1, the spring force mechanism 3, and the swing valve disc 2, and is used to pull the force end of the spring force mechanism 3 to slide in the direction of the swing valve disc 2 when the swing valve disc 2 is rotated to open. Specifically, the fixed end of the valve disc linkage mechanism 4 is connected to the base 1, and the force end of the valve disc linkage mechanism 4 is connected to the lower spring seat 31. The valve disc linkage mechanism 4 is also connected to the swing valve disc 2, and can apply force to the valve disc linkage mechanism 4 when the swing valve disc 2 is rotated to open, so that the valve disc linkage mechanism 4 can pull the lower spring seat 31 to slide in the direction of the swing valve disc 2, and then force the lower spring seat 31 to slide when the swing valve disc 2 rotates, so as to prevent the spring force mechanism 3 from getting stuck 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 send an action signal and a mechanical action signal when the swing valve disc 2 rotates to open. Specifically, the signal mechanism 5 can be installed on the base 1, and when the swing valve disc 2 is opened, the swing valve disc 2 triggers the signal mechanism 5, so that the signal mechanism 5 sends an action signal and a mechanical action signal to perform a fault alarm.

[0024] An integrated exhaust mechanism 6 is also provided on the base 1 for exhausting the unexhausted gas in the transformer. Specifically, the integrated exhaust mechanism 6 exhausts the gas at each oil inlet as much as possible.

[0025] Continue to see Figure 1 and Figure 2 The valve disc linkage mechanism 4 includes: a wire pressing shaft 41, a fixed lock buckle 42 and a connecting rope 43; wherein the wire pressing shaft 41 is arranged on the swing valve disc 2, and the force-applying ends of the wire pressing shaft 41 and the spring force-applying mechanism 3 are respectively arranged on both sides of the rotating shaft 21 of the swing valve disc 2; the fixed lock buckle 42 is placed on the side of the wire pressing shaft 41 facing away from the swing valve disc 2, and the fixed lock buckle 42 is located on the upper side of the wire pressing 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 fixed lock buckle 42, and the connecting rope 43 extends from the force-applying end of the spring force-applying mechanism 3 to the rotating shaft 21 of the swing valve disc 2 and from the swing valve disc 2 After passing around the upper side of the rotating shaft 21, the connecting rope 43 passes through the gap between the rotating shaft 21 of the swing valve disc 2 and the wire pressing shaft 41, and extends upward from the lower side of the wire pressing shaft 41 and then extends downward to the fixed lock buckle 42 to be connected to the fixed lock buckle 42; when the swing valve disc 2 is rotated to open, the wire pressing shaft 41 rotates around the rotating shaft 21 of the swing valve disc 2, so that the distance between the wire pressing shaft 41 and the fixed lock buckle 42 gradually increases, so as to force the end of the connecting rope 43 connected to the spring force applying mechanism 3 to gradually move toward the rotating shaft 21 of the swing valve disc 2, so as to pull the force applying end of the spring force applying mechanism 3 to slide toward the rotating shaft 21 of the swing valve disc 2.

[0026] Specifically, the wire pressing shaft 41 is installed on the swing valve disc 2 through a bracket, and the wire pressing shaft 41 and the lower spring seat 31 are respectively placed on the left and right sides of the rotating shaft 21 of the swing valve disc 2 (relative to Figure 2 In terms of the position shown in the figure), the wire pressing shaft 41 is also arranged in parallel with the rotating shaft 21 of the swing valve disc 2, and can seesaw-like rotate around the rotating shaft 21 of the swing valve disc 2 synchronously with the swing valve disc 2. Therefore, when the swing valve disc 2 rotates clockwise to open, that is, when it rotates to the upper right side, the wire pressing shaft 41 rotates clockwise accordingly and can rotate to the lower left side. In this embodiment, a valve disc bracket 7 is provided on the base 1, which is used to support the fixed lock buckle 42 and also to rotationally support the swing valve disc 2. The valve disc bracket 7 can have two bracket parts, which respectively rotationally support the rotating shaft 21 of the swing valve disc 2, and can also support the fixed lock buckle 42, so that the opening of the fixed lock buckle 42 faces Figure 2 The connecting rope 43 may be two, and the first ends of the two connecting ropes 43 (such as Figure 2 The left end shown in the figure passes through the force application end of the spring force application mechanism 3 and is connected. For example, the bottom of the lower spring seat 31 may be provided with two ear holes, and the first ends of the two connecting ropes 43 respectively pass through the two ear holes and are connected as an integral structure. The two connecting ropes 43 extend to the right from the first end, that is, extend toward the rotating shaft 21 of the swing valve disc 2, and after bypassing the upper side of the rotating shaft 21 of the swing valve disc 2, extend downward from the gap between the rotating shaft 21 of the swing valve disc 2 and the wire pressing shaft 41 to the lower side of the wire pressing shaft 41, and after bypassing the lower side of the wire pressing shaft 41, extend upward and extend to the fixed lock buckle 42, and extend downward from the opening of the fixed lock buckle 42 to the inside of the fixed lock buckle 42, so as to be locked by the fixed lock buckle 42. Among them, the connecting rope 43 is a non-elastic rope.

[0027] It can be seen from this that when the swing valve disc 2 is rotated to open, the wire pressing shaft 41 rotates clockwise and can rotate to the lower left side, thereby pressing the connecting rope 43 to move accordingly, so that the distance between the position of the connecting rope 43 placed on the lower side of the wire pressing shaft 41 and the end fixedly connected to the fixed lock buckle 42 increases, thereby lengthening the part of the connecting rope 43 placed on the right side, which can force 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 wire pressing shaft 41 rotates with the swing valve disc 2, and then the wire rope 6 that passes around it below moves downward, forcing the lower spring seat 31 to drive the roller on the lower spring seat 31 to slide along the slide groove, forming a linkage mechanism, which assists the swing valve disc 2 to operate smoothly.

[0028] Continue to see Figure 3 The signal mechanism 5 includes: a travel switch 51, a signal cam 52, a signal rod 53 and a signal handle 54; wherein the travel switch 51 is arranged on one side of the swing valve disc 2 (such as Figure 3 The signal cam 52 is located between the travel switch 51 and the swing valve disc 2, and the signal cam 52 is rotatably arranged on the base 1. The signal cam 52 is also connected to the swing valve disc 2, and is used for when the swing valve disc 2 rotates to open, the signal cam 52 rotates synchronously therewith to trigger the contact of the travel switch 51, so that the travel switch 51 sends an action signal; the signal rod 53 and the travel switch 51 are arranged on the same side of the signal cam 52 (as shown in FIG. Figure 3 The trigger end of the signal rod 53 (as shown in the right side) Figure 3 The signal handle 54 is rotatably disposed on the side of the signal rod 53 facing away from the signal cam 52 (as shown in the left end) and is pressed against the signal cam 52; Figure 3 As shown on the right side of the figure, the signal cam 52 can rotate to push the signal rod 53 to perform linear motion, so that the signal rod 53 pushes the signal handle 54 to rotate to the action position, which serves as a mechanical action signal to indicate that the swing valve disc 2 is in the open state.

[0029] Specifically, the signal cam 52 is fixedly connected to the swing valve disc 2. As the swing valve disc 2 rotates around the rotating 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 travel switch 51 as a follower to translate, that is, push the travel switch 51 to be triggered. On the other hand, the signal cam 52 can push the signal rod 53 as a follower to translate, thereby causing the signal handle 54 to rotate around its fixing pin to serve as a mechanical trigger signal to achieve a visual prompt.

[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 travel switch 51 to press the contacts of the travel switch 51 to trigger the travel switch 51.

[0031] Continue to see Figure 3 and Figure 4The signal cam 52 is provided with a mechanical push part 524, which has a limit surface 5241 and a mechanical signal top pressure surface 5242 set at an angle, and a circular arc transition surface 5243 is provided between the limit surface 5241 and the mechanical signal top pressure surface 5242. When the swing valve disc 2 is in the discharge port sealing position, the limit surface 5241 is in a vertical state, which is used to limit the triggering end of the signal rod 53. The signal handle 54 is in a vertical non-triggering position. The mechanical push part 524 and the signal cam The wheel 52 can rotate synchronously with the swing valve disc 2, so that during the rotation and opening process of the swing valve disc 2, the trigger end of the signal rod 53 presses against the arc transition surface 5243, so as to gradually push the signal rod 53 to move linearly in the direction away from the signal cam 52, and push the signal handle 54 to rotate gradually until the swing valve disc 2 is swung into place, and the trigger end of the signal rod 53 presses against the mechanical signal pressing surface 5242, and the signal handle 54 rotates to the inclined trigger position as a mechanical action signal.

[0032] Continue to see 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; wherein the exhaust seat assembly 61 is arranged on the bottom wall of the bottom plate 11 of the base 1 facing away from the swing valve disc 2, and a plurality of exhaust pipes 611 are provided on the exhaust seat assembly 61, which are used to extend into the corresponding oil inlets respectively to discharge the unexhausted gas in the transformer; the exhaust nozzle assembly 62 is arranged inside the base 1, an exhaust flow channel 112 is provided on the bottom plate 11 of the base 1, an exhaust port 121 is provided on the side plate 12 of the base 1, an air inlet of the exhaust flow channel 112 is connected to the exhaust seat assembly 61, an air outlet of the exhaust flow channel 112 is connected to the air inlet of the exhaust nozzle assembly 62, and an air outlet of the exhaust nozzle assembly 62 extends into the exhaust port; the exhaust cover plate 63 is detachably arranged at the exhaust port for exhausting gas.

[0033] Specifically, four exhaust pipes 611 and screw plugs extending to four oil inlets together constitute an exhaust seat assembly 61, and 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. Internal air can enter from 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 arranged at the nozzle outlet, that is, it is composed of a screw plug and an L-shaped nozzle. Gas can enter the screw plug from the internal exhaust flow channel 112 of the base 1 and flow out through the nozzle. The nozzle can be blocked with a screw plug. An exhaust port 121 is provided on the side panel 12 of the base 1, and the gas can be discharged to the outside of the valve through the exhaust port 121. The exhaust cover plate 63 can seal the opening with bolts.

[0034] In summary, the swing pressure relief valve provided in this embodiment can pull the lower spring seat 31 to slide in the direction of the swing valve disc 2, and then force the lower spring seat 31 to slide when the swing valve disc 2 rotates, thereby preventing the spring force mechanism 3 from getting stuck due to the swing valve disc 2 opening too quickly, thereby 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 rotates to open, an action signal and a mechanical action signal are sent out through the signal mechanism. In particular, since the swing valve disc 2 is equipped with a signal cam 52 that moves synchronously with it, it can give signals to the travel switch 51 and the signal rod 53 in time when it opens.

[0036] Furthermore, the unexhausted gas in the transformer is exhausted through the integrated exhaust mechanism 6, so that the gas located at each oil inlet is exhausted as much as possible. In particular, with multiple air inlets, it can better meet the exhaust needs of the multi-flap large valve.

[0037] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0038] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A swing pressure relief valve, characterized in that: include: Pedestal; A swing valve disc is rotatably arranged at the discharge port of the base; A spring force applying mechanism, wherein the fixed end is arranged above the base bottom plate, and the force applying end is connected to the swing valve disc in a rotatable and slidable manner, so that when the swing valve disc is rotated to open, the force applying end of the spring force applying mechanism can slide relative to the swing valve disc in the direction of 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 sealing position of the discharge port; The valve disc linkage mechanism is respectively connected to the base, the spring force mechanism, and the swing valve disc, and is used to pull the force end of the spring force mechanism to slide toward the swing valve disc when the swing valve disc rotates to open.

2. The swing pressure relief valve according to claim 1, characterized in that: The valve disc linkage mechanism comprises: A wire pressing shaft is arranged on the swing valve disc, and the wire pressing shaft and the force applying end of the spring force applying mechanism are respectively arranged on both sides of the rotating shaft of the swing valve disc; A fixed lock buckle is placed on the side of the wire pressing shaft facing away from the swing valve disc, and the fixed lock buckle is located on the upper side of the wire pressing shaft; The connecting rope is in a taut state, and its two ends are respectively connected to the applying end of the spring applying mechanism and the fixed lock buckle. The connecting rope extends from the applying end of the spring applying mechanism to the rotating shaft of the swing valve disc and passes around the upper side of the rotating shaft of the swing valve disc. Then, the connecting rope passes through the gap between the rotating shaft of the swing valve disc and the wire pressing shaft, and extends upward from the lower side of the wire pressing shaft and then extends downward into the fixed lock buckle to be connected to the fixed lock buckle; when the swing valve disc is rotated to open, the wire pressing shaft rotates around the rotating shaft of the swing valve disc, so that the distance between the wire pressing shaft and the fixed lock buckle gradually increases, so as to force the end of the connecting rope connected to the spring applying mechanism to gradually move toward the rotating shaft of the swing valve disc, so as to pull the applying end of the spring applying mechanism to slide toward the rotating shaft of the swing valve disc.

3. The swing pressure relief valve according to claim 2, characterized in that: The base is provided with a valve disc support for supporting the fixed lock buckle and for rotatably supporting the swing valve disc.

4. The swing pressure relief valve according to any one of claims 1 to 3, characterized in that: The swing valve disc is also connected to a signal mechanism for sending an action signal and a mechanical action signal when the swing valve disc rotates to open.

5. The swing pressure relief valve according to claim 4, characterized in that: The signal mechanism comprises: A travel switch, arranged on one side of the swing valve disc; a signal cam, located between the travel switch and the swing valve disc, and the signal cam is rotatably arranged on the base, and the signal cam is also connected to the swing valve disc, and is used for when the swing valve disc rotates to open, the signal cam rotates synchronously therewith to trigger the contact of the travel switch, so that the travel switch sends an action signal; A signal rod, wherein the signal rod and the travel switch are arranged on the same side of the signal cam, and a trigger end of the signal rod is in pressing contact with the signal cam; The signal handle is rotatably arranged 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 move linearly, so that the signal rod pushes the signal handle to rotate to the action position, which serves as a mechanical action signal to indicate that the swing valve disc is in an open state.

6. The swing pressure relief valve according to claim 5, characterized in that: The signal cam is provided with 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, and 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 travel switch to press the contact of the travel switch to trigger the travel switch.

7. The swing pressure relief valve according to claim 5, characterized in that: The signal cam is provided with a mechanical pushing part, which has a limit surface and a mechanical signal pressure surface set at an angle, and an arc transition surface is provided between the limit surface and the mechanical signal pressure surface. When the swing valve disc is in the discharge port sealing position, the limit surface is in a vertical state, which is used to limit the triggering end of the signal rod, and the signal handle is in a vertical non-triggering position. The mechanical pushing part and the signal cam can rotate synchronously with the swing valve disc, so that during the rotation and opening process of the swing valve disc, the triggering end of the signal rod presses and contacts on the arc transition surface, so as to gradually push the signal rod to move linearly in a direction away from the signal cam, and push the signal handle to rotate gradually until the swing valve disc is swung into place, the triggering end of the signal rod presses and contacts on the mechanical signal pressure surface, and the signal handle rotates to an inclined trigger position as a mechanical action signal.

8. The swing pressure relief valve according to any one of claims 1 to 3, characterized in that: The base is also provided with an integrated exhaust mechanism for exhausting the unexhausted gas in the transformer.

9. The swing pressure relief valve according to claim 8, characterized in that: The integrated exhaust mechanism comprises: An exhaust seat assembly is arranged on the bottom wall of the base bottom plate facing away from the swing valve disc, and a plurality of exhaust pipes are arranged on the exhaust seat assembly, which are used to extend into corresponding oil inlets respectively to exhaust the unexhausted gas in the transformer; An exhaust nozzle assembly is arranged inside the base, an exhaust flow channel is arranged on the bottom plate of the base, an exhaust port is arranged on the side plate of the base, an air inlet of the exhaust flow channel is communicated with the exhaust base assembly, an air outlet of the exhaust flow channel is communicated with the air inlet of the exhaust nozzle assembly, and an air outlet of the exhaust nozzle assembly extends into the exhaust port; An exhaust cover plate is detachably arranged at the exhaust port and is used for exhausting gas.

10. The swing pressure relief valve according to claim 9, characterized in that: The exhaust nozzle assembly comprises a nozzle and an exhaust screw plug arranged at the outlet of the nozzle.

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