CN212203144U - Relief valve - Google Patents

Abstract

The utility model relates to a blow-off valve, this blow-off valve includes: a valve body; the valve seat is arranged on the valve body; the valve cover is arranged at the top of the valve seat and used for sealing the top opening of the valve seat; the transmission mechanism comprises a crank, a rocker and a transmission main shaft, the transmission main shaft is rotatably arranged on the valve body, the bending part of the crank and one end of the rocker are rotatably connected to the transmission main shaft, and the other end of the rocker is hinged with the valve cover; the driving mechanism is arranged on the valve body and connected with one end of the crank, and can drive the crank to rotate and drive the rocker to rotate through the crank, so that the valve cover is driven to move to open or close the second valve cavity; the disc spring cylinder is rotatably arranged on the valve body through a connecting rod and is hinged with the other end of the crank, and when the driving mechanism drives the crank to rotate, the disc spring cylinder can be driven to rotate, and pressure is applied to the valve cover to enable the valve cover to be sealed on the valve seat. The utility model discloses a bleeding valve is high temperature resistant, the valve gap stroke is little, can realize automatic, quick bleeding to can guarantee long-time steady operation.

Description

Relief valve

Technical Field

The utility model relates to the technical field of valves, concretely relates to relief valve.

Background

The stability of gas pressure in the furnace kiln and the pipeline is the key for normal operation of systems such as metallurgy, chemical engineering, energy and the like, and the diffusion valve is used as key equipment for stabilizing the gas pressure in the furnace kiln and the pipeline and is widely applied to systems such as metallurgy, chemical engineering, energy and the like; as a leading-edge technology of the steel industry, smelting reduction iron making has the advantages of short flow, low investment and low pollution, but the temperature (1450 ℃) of generated gas is far higher than that of blast furnace iron making, and the existing bleeding valve structure is not suitable for the working condition. The existing bleeding valve is long in valve cover stroke and low in bleeding speed, and high-temperature media can scour the valve when the valve is diffused, so that the valve is easy to be sealed untight, and the using effect of the bleeding valve is influenced.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned problem that prior art exists, the utility model discloses an aspect's aim at provides a bleeding valve, under the prerequisite that satisfies conventional bleeding valve function, realized high temperature resistant, automatic bleeding, the valve gap stroke is little, the fast performance of bleeding to can guarantee long-time steady operation.

In order to achieve the above object, the present invention provides a bleeding valve, including:

the valve body is internally provided with a first valve cavity;

the valve seat is arranged on the valve body and is provided with a second valve cavity communicated with the first valve cavity;

the valve cover is arranged on the top of the valve seat and used for covering the top opening of the second valve cavity;

the transmission mechanism comprises a crank, a rocker and a transmission main shaft, the transmission main shaft is rotatably arranged on the valve body, the bending part of the crank and one end of the rocker are rotatably connected to the transmission main shaft, and the other end of the rocker is hinged to the valve cover;

the driving mechanism is arranged on the valve body and connected with one end of the crank, and can drive the crank to rotate and drive the rocker to rotate through the crank, so that the valve cover is driven to move to open or close the second valve cavity;

the disc spring cylinder is rotatably arranged on the valve body through a connecting rod and is hinged to the other end of the crank, the driving mechanism drives the crank to rotate, the disc spring cylinder can be driven to rotate, and a certain disc spring force can be generated when the disc spring cylinder rotates, so that when the valve cover is covered on the valve seat, the force for sealing the valve cover and the valve seat is applied to the valve cover.

In some embodiments, the crank comprises a first crank arm and a second crank arm disposed at a predetermined angle, the first crank arm being articulated with the drive mechanism, the second crank arm being articulated with the disc spring barrel.

In some embodiments, the transmission mechanism further includes a beam frame and a connecting plate, the beam frame includes a beam and connecting arms disposed at two ends of the beam, the beam is mounted above the valve cover and connected with the valve cover through a cross hinge shaft, the connecting arms are hinged to the other end of the rocker, the connecting plate is located on one side of the rocker, one end of the connecting plate is hinged to the valve cover, the other end of the connecting plate is hinged to the valve body, and the valve cover, the beam, the connecting plate and the rocker form a four-bar linkage mechanism so as to drive the valve cover to open or close when the crank drives the rocker to rotate.

In some embodiments, one end of the connecting rod is hinged to the valve body, the other end of the connecting rod is hinged to the outer wall of the disc spring barrel, and the crank rotates in a first direction to drive the connecting rod and the disc spring barrel to rotate in a second direction opposite to the first direction, and the connecting rod is driven to rotate in the first direction through the disc spring barrel after the crank rotates to a certain position in the first direction.

In some embodiments, the bleed valve further comprises a limiting mechanism mounted to the valve body to limit rotation of the disc spring barrel.

In some embodiments, the disc spring barrel includes a barrel, a disc spring shaft and a disc spring, the disc spring shaft is inserted into the barrel, and one end of the disc spring shaft extends out of the barrel and is connected with the other end of the crank, the disc spring is sleeved on the disc spring shaft located in the barrel, the disc spring shaft is provided with a butting portion which butts against the disc spring, and when the crank rotates to drive the disc spring barrel to rotate, the disc spring shaft can compress or release the disc spring to generate a certain disc spring force and act on the crank.

In some embodiments, the cavity wall of the first valve cavity is a hollow double-layer structure, wherein a hollow part forms a valve body water cavity, and a valve body water inlet and a valve body water outlet which are communicated with the valve body water cavity are arranged on the cavity wall; the cavity wall of the second valve cavity is of a hollow double-layer structure, a hollow part of the cavity forms a valve seat water cavity, and a valve seat water inlet and a valve seat water outlet which are communicated with the valve seat water cavity are formed in the cavity wall of the second valve cavity; the valve cover is of a hollow double-layer structure, a valve cover water cavity is formed in the hollow part of the valve cover, and a valve cover water inlet and a valve cover water outlet which are communicated with the valve cover water cavity are formed in the valve cover.

In some embodiments, the cavity wall of the first valve cavity is provided with a temperature-resistant and heat-insulating material, the cavity wall of the second valve cavity is provided with a temperature-resistant and heat-insulating material, and the inner layer of the double-layer structure of the valve cover is made of a high-temperature-resistant and corrosion-resistant stainless steel material.

In some embodiments, the relief valve further comprises a valve cover seat, the valve cover seat is mounted on the valve seat, a sealing member is arranged between the valve cover seat and the valve seat, the sealing member comprises an annular first sealing member and an annular second sealing member, the second sealing member is arranged on the outer side of the first sealing member and spaced from the first sealing member, the first sealing member is a metal sealing member, and the second sealing member is a non-metal sealing member.

In some embodiments, the valve seat has a valve seat sealing surface that mates with the first seal, the valve seat sealing surface is spherical, the valve bonnet seat has a bonnet sealing surface that mates with the first seal, the bonnet sealing surface is conical, and the valve seat sealing surface and the bonnet sealing surface sealingly engage the first seal from opposite sides; the mounting height of the first seal is higher than the mounting height of the second seal.

Compared with the prior art, the utility model provides a diffuse valve the embodiment of the utility model provides a diffuse valve passes through crank connection actuating mechanism and dish spring section of thick bamboo to through the rocker connection valve gap, realize opening or closing of valve gap, simultaneously, connect the dish spring section of thick bamboo through crank drive, the dish spring force that produces when utilizing dish spring section of thick bamboo to rotate seals the valve gap, and transmission structure is reasonable, and the stroke that the valve gap was opened and was closed is little, can realize quick, automatic diffusing, and can guarantee long-time steady operation.

Drawings

In the drawings, which are not necessarily drawn to scale, like reference numerals may describe similar components in different views. Like reference numerals having letter suffixes or different letter suffixes may represent different instances of similar components. The drawings illustrate various embodiments, by way of example and not by way of limitation, and together with the description and claims, serve to explain the embodiments of the invention. The same reference numbers will be used throughout the drawings to refer to the same or like parts, where appropriate. Such embodiments are illustrative, and are not intended to be exhaustive or exclusive embodiments of the present apparatus or method.

FIG. 1 is a schematic structural diagram of a bleeding valve according to an embodiment of the present invention;

FIG. 2 is a schematic view of another aspect of a bleed valve according to an embodiment of the present invention;

FIG. 3 is a partial cross-sectional view of a valve body of a bleed valve according to an embodiment of the present invention;

FIG. 4 is an enlarged schematic view of a portion circled A in FIG. 3;

FIG. 5 is a side, partially cross-sectional view of a valve seat and valve cover of a bleed valve in accordance with an embodiment of the present invention;

FIG. 6 is a cross-sectional view taken along line B-B of FIG. 5;

FIG. 7 is an enlarged schematic view of a portion encircled by C in FIG. 6;

fig. 8 is a top cross-sectional view of a disc spring cartridge of a bleed valve in accordance with an embodiment of the present invention;

fig. 9 is a schematic view of a valve cover of a bleeding valve according to an embodiment of the present invention in a closed state;

fig. 10 is a schematic view of a valve cover of a bleeding valve according to an embodiment of the present invention in an open state.

Reference numerals:

1-valve body, 11-first valve cavity, 12-valve body frame, 13-valve body water cavity, 14-valve body water inlet, 15-valve body water outlet, 16-connecting water pipe and 17-temperature-resistant heat-insulating material;

2-valve seat, 21-second valve cavity, 22-valve seat water cavity, 23-valve seat water inlet, 24-valve seat water outlet, 25-temperature-resistant heat-insulating material, 26-support ring, 27-gland and 28-valve seat sealing surface;

3-valve cover, 31-valve cover water cavity, 32-valve cover water inlet and outlet;

41-crank, 411-first crank arm, 412-second crank arm; 42-rocker; 43-a drive spindle; 44-beam, 441-beam, 442-link arm; 45-connecting plate, 46-cross hinge shaft and 47-hinge part;

5-drive mechanism, 51-piston rod; 6-disc spring cylinder, 61-cylinder, 62-disc spring shaft, 621-abutting part, 622-output end, 63-disc spring, 64-adjusting nut, 65-dust cover; 7-a connecting rod; 8-a limiting mechanism; 9-bonnet seat, 91-bulge, 92-bonnet sealing surface; 101-first seal, 102-second seal.

Detailed Description

In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined below to clearly and completely describe the technical solution of the embodiments of the present invention.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which the invention belongs. The use of "first," "second," and similar terms in the description herein do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

To maintain the following description of the embodiments of the present invention clear and concise, detailed descriptions of well-known functions and components may be omitted.

Fig. 1 to 10 are schematic structural views of a bleeding valve according to an embodiment of the present invention. As shown in fig. 1 to 10, an embodiment of the present invention provides a bleeding valve, including:

a valve body 1, a first valve cavity 11 is formed inside the valve body;

a valve seat 2 mounted on the valve body 1 and having a second valve chamber 21 communicating with the first valve chamber 11;

a valve cover 3 mounted on the top of the valve seat 2 for closing the top opening of the second valve chamber 21;

the transmission mechanism comprises a crank 41, a rocker 42 and a transmission main shaft 43, the transmission main shaft 43 is rotatably arranged on the valve body 1, the bending part of the crank 41 and one end of the rocker 42 are rotatably connected to the transmission main shaft 43, and the other end of the rocker 42 is hinged with the valve cover 3;

the driving mechanism 5 is arranged on the valve body 1 and is connected with one end of the crank 41, and the driving mechanism 5 can drive the crank 41 to rotate and drive the rocker 42 to rotate through the crank 41 so as to drive the valve cover 3 to move to open or close the second valve cavity 21;

the disc spring cylinder 6 is rotatably arranged on the valve body 1 through the connecting rod 7 and is hinged to the other end of the crank 41, when the driving mechanism 5 drives the crank 41 to rotate, the disc spring cylinder 6 can be driven to rotate, and when the disc spring cylinder 6 rotates, a certain disc spring force can be generated so that when the valve cover 3 covers the valve seat 2, the force for sealing the valve cover 3 and the valve seat 2 is applied to the valve cover 3.

The bleeding valve can be arranged at the furnace mouth of the blast furnace and also can be arranged on a high-temperature pipeline. Specifically, under the normal working pressure state of the bleeding valve, the driving mechanism 5 drives the transmission mechanism to move to drive the valve cover 3 to open or close, and the disc spring cylinder 6 is used for carrying out pressure sealing on the valve cover 3; when the medium pressure in the blast furnace (or in the pipeline) is higher than the preset pressure, the valve cover 5 drives the transmission mechanism to compress the disc spring cylinder 6, so that the valve cover 5 is slightly opened, the automatic releasing function is realized, and when the medium pressure is recovered, the valve cover 3 is recovered to a sealing state under the action of the disc spring cylinder 6.

The preset pressure is determined according to the disc spring force (disc spring force) of the disc spring cylinder 6 for sealing the valve cover 3, namely the sealing force of the valve cover 3 is ensured by the disc spring force of the disc spring cylinder 6, the disc spring cylinder 6 pushes the crank 41 to drive the rocker 42 to provide downward sealing pressure for the valve cover 3 so as to overcome the medium pressure and ensure the sealing performance of the valve, when the medium pressure in the blast furnace is greater than the sealing pressure, the sealing pressure provided by the disc spring cylinder 6 cannot ensure the sealing of the valve cover 3 after overcoming the medium pressure of the bleeding valve, the valve cover 3 leaks, the automatic bleeding function is realized, when the medium in the furnace leaks for a certain amount, the system pressure returns to normal, the disc spring cylinder 6 pushes the valve cover 3 to act, and the valve cover 3 is in a sealing state again under the pressure action of the disc spring cylinder 6.

The embodiment of the utility model provides a diffuse valve passes through crank 41 and connects actuating mechanism 5 and dish spring section of thick bamboo 6 to connect valve gap 3 through rocker 42, realize opening or closing of valve gap 3, simultaneously, connect dish spring section of thick bamboo 6 through the crank 41 transmission, the dish spring power that produces when utilizing the rotation of dish spring section of thick bamboo 6 seals the valve gap, and the transmission is rational in infrastructure, and the stroke that valve gap 3 was opened and was closed is little, can realize quick, automatic diffusing, and can guarantee long-time steady operation.

As shown in fig. 1 to 3, in the present embodiment, the valve body 1 includes a valve body frame 12 provided on one side of the first valve chamber 11 to facilitate installation of the transmission mechanism and the drive mechanism 5. The valve body frame 12 includes two curb plates of relative setting, two curb plates are worn to locate by transmission main shaft 43, transmission main shaft 43 is located and is located between two curb plates to the department of bending of crank 41 cover, transmission main shaft 43 is located and is located the outside of two curb plates to the rocker 42 cover, actuating mechanism 5 and dish spring section of thick bamboo 6 are installed between two curb plates, crank 41 is including the first crank arm 411 and the second crank arm 412 that extend to different directions from the department of bending, and first crank arm 411 and second crank arm 412 are predetermined angle setting, first crank arm 411 is articulated with actuating mechanism 5, second crank arm 412 is articulated with dish spring section of thick bamboo 6, in order to realize actuating mechanism 5 and the transmission connection of dish spring section of thick bamboo 6.

The preset angle is predetermined according to the action stroke of the driving mechanism 5, the sizes of the disc spring cylinder 6 and the connecting rod 7 and the like so as to adapt to the diffusion valves with different specifications, and the structure is ensured to be more compact and the appearance is more attractive on the premise of meeting the use requirements of the valves.

Further, the transmission mechanism further comprises a cross beam frame 44 and a connecting plate 45, the cross beam frame 44 comprises a cross beam 441 and connecting arms 442 arranged at two ends of the cross beam 441, the cross beam 441 is mounted above the valve cover 3 and connected with the valve cover 3 through a cross hinge shaft 46, the connecting arms 442 are hinged to the other end of the rocker 42, the connecting plate 45 is located on one side of the rocker 42, one end of the connecting plate 45 is hinged to the valve cover 3, the other end of the connecting plate 45 is hinged to the valve body 1, and the valve cover 3, the cross beam 44, the connecting plate 45 and the rocker 42 form a four-bar linkage mechanism so as to drive the valve cover 3 to be opened or closed when the crank 41 drives.

As shown in fig. 2, the connecting plate 45 is located inside the rocker 42 and is disposed parallel to the rocker 42, and the valve body 1 is provided with a hinge portion 47 connected to the connecting plate 45, and the connecting plate 45 can be hinged to the hinge portion 47 by a pin. In this embodiment, two rocking levers 42 are provided on the outer side of the valve body frame 12 to be respectively hinged to the outer sides of the two connecting arms 442 on both sides of the cross frame 44, and correspondingly, two link plates 45 are provided on the inner side of the rocking levers 42 to be respectively hinged to the inner sides of the two connecting arms 442. The four-bar mechanism formed by the valve cover 3, the cross beam 44, the connecting plate 45 and the rocker 42 can ensure stable and reliable transmission, the stroke of the valve cover 3 is small, and quick release can be realized.

As shown in fig. 9 and 10, when the driving mechanism 5 drives the rocker 42 to rotate clockwise to drive the valve cover 3 to move upward, the connecting plate 45 and the valve cover 3 rotate clockwise simultaneously under the cooperation of the connecting plate 45, so that the rotating angle of the valve cover 3 is larger than that of the rocker 42, that is, the valve cover 3 can be opened quickly under the condition of small driving force, and a small rotation angle can be provided for the rotation of the rocker 42 through the cooperation of the connecting plate 45. In addition, in the embodiment, the turning radius of the valve cover 3 is small, so that the impact on the valve cover 3 can be reduced when the valve cover is opened quickly; and the valve cover 3 is completely positioned at one side of the valve cavity after being opened, so that a medium diffusion channel can be completely avoided, and the valve cover 3 is prevented from being washed by high-temperature media. In this embodiment, the position of the valve cover 3 is moderate, which can not only avoid the medium in the pipeline from being washed away during the diffusion, but also ensure that the stroke of the valve cover 3 is as small as possible, so as to realize the rapid diffusion.

The rotation direction of the crank 41 is the same as the rotation direction of the rocker 42 and the connecting plate 45, and the rocker 42 and the connecting plate 45 are driven to rotate simultaneously through the rotation of the crank 41 to realize the opening and closing of the valve cover 3 in the normal working state.

Actuating mechanism 5 can also be hydraulic drive mechanism for motor drive mechanism, and in this embodiment, actuating mechanism 5 adopts the pneumatic cylinder, and the pneumatic cylinder can also be hydraulic cylinder for hydraulic cylinder, and upper and lower side is located respectively to dish spring section of thick bamboo 6 and pneumatic cylinder, compares in motor drive, and structural arrangement is more reasonable, compact, can reduce the occupation space of bleeding the valve.

As shown in fig. 1 and fig. 2, in the present embodiment, the connecting rod 7 is a plate-shaped structure, one end of the connecting rod 7 is hinged to the valve body 1, the other end of the connecting rod 7 is hinged to the outer wall of the disc spring barrel 6, and the rotation of the crank 41 in the first direction can drive the connecting rod 7 and the disc spring barrel 6 to rotate in the second direction opposite to the first direction, and after the crank 41 rotates to a certain position in the first direction, the disc spring barrel 6 drives the connecting rod 7 to rotate in the first direction.

Specifically, the rotation of the crank 41 in the first direction can drive the connecting rod 7 and the disc spring barrel 6 to rotate in the second direction opposite to the first direction, which means that: the crank 41 rotates in the first direction to drive the disc spring barrel 6 to rotate in the second direction, and the disc spring barrel 6 rotates in the second direction to drive the connecting rod 7 to rotate in the second direction. In some embodiments, as shown in fig. 1, 2, 9 and 10, a position limiting mechanism 8 is disposed above the connection between the crank 41 and the disc spring barrel 6, the position limiting mechanism 8 is mounted on the top of the valve body frame 12, and can limit the rotation of the disc spring barrel 6 and enable the disc spring barrel 6 to rotate around the position limiting mechanism 8, that is, the position limiting mechanism 8 can be used as the rotation center of the disc spring barrel 6 within a certain rotation range. The limiting mechanism 8 comprises two limiting rods which are arranged in parallel, a certain distance is arranged between the two limiting rods, and the two limiting rods are different in installation height, so that an inclined part is formed, the disc spring barrel 6 is limited, and the disc spring barrel 6 is convenient to rotate.

As shown in fig. 8, the disc spring barrel 6 includes a barrel 61, a disc spring shaft 62 and a disc spring 63, the disc spring shaft 62 is inserted into the barrel 61, and one end of the disc spring shaft 62 extends out of the barrel 61 and is connected with the other end of the crank 41, the disc spring 63 is sleeved on the disc spring shaft 62 located in the barrel 61, an abutting portion 621 abutting against the disc spring 63 is arranged on the disc spring shaft 62, the abutting portion 621 is located in the barrel 61, when the crank 41 rotates to drive the disc spring barrel 6 to rotate, the disc spring shaft 62 can compress or release the disc spring 63 to generate a certain disc spring force and act on the crank 41. The end of the disc spring shaft 62 connected to the crank 41 is an output end 622, the output end is hinged to the second crank arm 412, and the other end (the end away from the valve body 1) of the disc spring shaft 62 is a tail end.

As shown in fig. 9 and 10, the operation process of the bleeding valve provided by the embodiment of the present invention is as follows:

when the hydraulic cylinder works, oil is fed into a rodless cavity of the hydraulic cylinder to extend a piston rod 51, the piston rod 51 extends out to drive a crank 41 to rotate along a first direction (clockwise direction in the embodiment) and can drive a valve cover 3 to rotate and open along the same direction (clockwise direction) through a first crank arm 411 and a rocker 42, the crank 41 also drives a disc spring cylinder 6 to rotate along a second direction (anticlockwise direction) through a second crank arm 412 when rotating along the first direction, when the disc spring cylinder 6 rotates, an abutting part 621 of a disc spring shaft 62 compresses a disc spring 63, when the crank 41 drives the disc spring cylinder 6 to rotate to a first position where the center line of the first crank arm 411 is collinear with the center line of the disc spring cylinder 6, the disc spring cylinder 6 is in contact with a limiting mechanism 8, and the compression amount of the disc spring 63 is maximum; when the driving mechanism 5 drives the crank 41 to rotate continuously along the first direction, the disc spring barrel 6 is driven to rotate continuously along the second direction around the limiting mechanism 8 by taking the limiting mechanism 8 as a rotation center, meanwhile, the disc spring 63 is released until the release amount is maximum, at this time, the crank 41 rotates to the second position along the first direction, and the abutting part 621 abuts against the end wall of the barrel 61; when the driving mechanism 5 drives the crank 41 to rotate continuously in the first direction, the disc spring cylinder 6 does not rotate continuously with the crank 41, and the crank 41 drives the connecting rod 7 to rotate in the first direction through the disc spring cylinder 6 until the crank 41 rotates to a third position (as shown in fig. 10) at which the valve cover 3 is completely opened. That is, the disc spring tube 6 only acts as a rigid link pulling the connecting rod 7 to rotate with the crank 41 during the rotation of the crank 41 from the second position to the third position.

The process of closing the valve cover 3 is opposite to the process of opening the valve cover 3, the hydraulic cylinder works reversely, the rod cavity is filled with oil, so that the piston rod 51 retracts, the crank 41 is driven (from the third position) to rotate along the second direction (anticlockwise direction), the valve cover 3 is driven to close through the first crank arm 411 and the rocker 42, the connecting rod 7 is driven to rotate along the second direction to the second position through the second crank arm 412 and the disc spring cylinder 6 when the crank 41 rotates along the second direction, and in the rotating process, the disc spring cylinder 6 is fixed (the abutting part 621 abuts against the end wall of the cylinder body 61) and does not rotate along with the crank 41, and only the effect of pulling the connecting rod 7 to rotate is achieved; the crank 41 continues to rotate in the second direction, the abutting portion 621 is separated from the end wall of the cylinder 61, the crank 41 rotates to drive the disc spring barrel 6 and the connecting rod 7 to rotate in the first direction (clockwise direction), and the disc spring 63 is compressed by the abutting portion 621, when the crank 41 drives the disc spring barrel 6 to rotate to the first position where the center line of the first crank arm 411 and the center line of the disc spring barrel 6 are collinear, the compression amount of the disc spring 63 is maximum, when the driving mechanism 5 drives the crank 41 to continue to rotate in the second direction, the disc spring 63 is released, the disc spring force generated by the release of the disc spring 63 is transmitted to the bonnet 3 through the crank 41 and the rocker 42, and when the bonnet 3 is covered on the valve seat 2, the disc spring barrel 6 exerts a certain pressure on the bonnet 3 to seal the bonnet 3 on the valve seat 2 (as shown in fig. 9). At the moment, the oil inlet and the oil outlet of the hydraulic cylinder are decompressed, the piston rod 51 of the hydraulic cylinder is in a free state, and the valve cover 3 pushes the crank 41 to drive the rocker 42 to provide sealing force for the valve cover 3 by the sealing pressure of the disc spring barrel 6 so as to seal the valve.

The first direction is a direction for opening the valve cover 3, and the second direction is a direction for closing the valve cover 3. In this embodiment, the transmission mechanism and the driving mechanism 5 are disposed on the right side of the valve cover 3, so that the first direction is clockwise and the second direction is counterclockwise. In other embodiments, the first direction is counterclockwise when the transmission mechanism and the driving mechanism 5 are disposed on the left side of the valve cover 3.

As shown in fig. 9 and 10, when the crank 41 drives the disc spring barrel 6 to rotate to a first position where the center line of the first crank arm 411 is collinear with the center line of the disc spring barrel 6, taking the opening of the valve cover 3 as an example, the connecting rod 7 also rotates to a first position where the center line thereof is collinear with the center line of the disc spring barrel 6, the center of the transmission main shaft 43, the first hinge point of the second crank arm 412 and the disc spring barrel 6, and the second hinge point of the connecting rod 7 and the valve body frame 12 are collinear, the connection of the three points is a straight line, the compression amount of the disc spring 63 under the compression of the abutting portion 621 is maximum, and the connecting rod 7 and the disc spring 6 are always parallel in the process that the crank 41 rotates from the initial position to the first position along the first direction (clockwise direction); when the crank 41 continues to rotate, under the action of the limiting mechanism 8, the rotation center of the disc spring cylinder 6 is switched to the limiting mechanism 8 from the first hinge point, the disc spring cylinder 6 continues to rotate around the limiting mechanism 8 and drives the connecting rod 7 to continue to rotate, the center of the transmission main shaft 43, the first hinge point of the second crank arm 412 and the disc spring cylinder 6 and the second hinge point of the connecting rod 7 and the valve body frame 12 are connected in a triangular structure, and the disc spring 63 is released; due to the action of the limiting mechanism 8, after the disc spring 63 is completely released, the crank 41 can drive the connecting rod 7 to rotate in the same direction through the disc spring barrel 6, so that the valve cover 3 is ensured to be opened, and the reliability of a product is improved.

When the limiting mechanism 8 is not arranged, the crank 41 rotates along the first direction to always drive the disc spring cylinder 6 to rotate along the second direction, and when the disc spring cylinder 6 rotates to a certain degree, the connecting rod 7 has two degrees of freedom, so that certain uncertainty exists in the rotation of the connecting rod, and the valve cover 3 cannot be opened.

The embodiment of the utility model provides an in, through the cooperation of crank 41, dish spring section of thick bamboo 6, connecting rod 7 and stop gear 8, can provide certain helping hand when valve gap 3 is opened to a certain extent and guarantee that valve gap 3 opens, when valve gap 3 closes, applys certain helping hand, guarantees that valve gap 3 is sealed.

During the closing process of the valve cover 3, the disc spring cylinder 6 compressed to a certain compression amount releases the generated thrust to push the crank 41 to move along the closing direction of the valve cover 3. The thrust generated by the disk spring cylinder 6 is the sealing pressure for sealing the valve cover 3 on the valve seat 2, and the output of the sealing pressure is realized by compressing the disk spring 63 and pushing the disk spring shaft 62, i.e. the magnitude of the thrust output by the disk spring cylinder 6 is determined according to the compression amount of the disk spring 63. As shown in fig. 8, an adjusting nut 64 for adjusting the compression amount of the disc spring 63 is provided at the rear end of the cylinder 61, and the adjusting nut 64 is fitted around the outer periphery of the cylinder 61. Under the state that the bleed valve was closed, the compression capacity of adjusting dish spring 63 through adjusting nut 64 can guarantee that dish spring 63 exports invariable thrust (sealing pressure) to satisfy the requirement of valve gap 3 seal specific pressure, thereby adjust the bleed pressure of bleed valve, the size of specific bleed pressure is confirmed according to actual conditions.

Preferably, the rear end of the barrel 61 is also provided with a dust cover 65 to prevent dust from entering the barrel 61 and affecting the compression and release of the disc spring 63.

In some embodiments, as shown in fig. 3 and 4, the cavity wall of the first valve cavity 11 is a hollow double-layer structure, wherein a hollow portion forms the valve body water cavity 13, and a valve body water inlet 14 and a valve body water outlet 15 which are communicated with the valve body water cavity 13 are arranged on the cavity wall; as shown in fig. 5 to 7, the cavity wall of the second valve cavity 21 is also a hollow double-layer structure, wherein a hollow portion forms a valve seat water cavity 22, and a valve seat water inlet 23 and a valve seat water outlet 24 which are communicated with the valve seat water cavity 22 are arranged on the cavity wall of the second valve cavity 21; the valve cover 3 is a hollow double-layer structure, a valve cover water cavity 31 is formed in the hollow part of the valve cover 3, and a valve cover water inlet and outlet 32 communicated with the valve cover water cavity 31 is arranged on the valve cover 3.

Further, the valve body water outlet 15 and the valve seat water inlet 23 are connected through a connecting water pipe 16 to communicate the valve body water cavity 13 and the valve seat water cavity 22, so that water circulation is realized.

The embodiment of the utility model provides an in, adopt bilayer structure to form hollow water cavity to continuously let in the cooling water in to the water cavity, can take away the conduction to the casing heat of valve body 1, disk seat 2 and valve gap 3, guarantee to be in safe use temperature in the valve cavity of valve of diffusing, make the valve of diffusing can be high temperature resistant, guarantee the structural strength and the life of valve body 1 disk seat 2 and valve gap 3, thereby guarantee to diffuse the life of valve.

Further, the wall of the first valve cavity 11 is provided with a temperature-resistant heat-insulating material 17; the cavity wall of the second valve cavity 21 is also provided with a temperature-resistant and heat-insulating material 25, and the inner layer of the double-layer structure of the valve cover 3 is made of a high-temperature-resistant and corrosion-resistant stainless steel material.

The valve body 1, the valve seat 2 and the valve cover 3 are generally made of materials such as steel plates, temperature-resistant heat-insulating materials are poured in the valve body 1 and the valve seat 2, heat conduction to the steel plates can be reduced, and the temperature in the valve cavity is within a certain range. Because the valve gap 3 will follow the motion of actuating mechanism 5, in order to avoid the vibrations in the motion process to cause the temperature resistant heat insulating material to drop, do not set up the temperature resistant heat insulating material in the valve gap 3, but adopt high temperature resistant and corrosion resistant stainless steel material in its inlayer, simultaneously, can reduce the high temperature medium to the washing away of valve gap 3.

The embodiment of the utility model provides an in, through hollow water cavity and temperature resistant thermal insulation material's cooperation, can prevent on the one hand that too high temperature is to the damage of bleeding valve, on the other hand can reduce calorific loss, makes the temperature in the bleeding valve keep in the certain limit, improves the life of bleeding valve.

In some embodiments, as shown in fig. 6 and 7, the relief valve further comprises a valve cover seat 9, the valve cover seat 9 is mounted on the valve seat 2, the valve cover seat 9 is provided with a mounting cavity for mounting the valve cover 3, and the valve cover 3 and the valve cover seat 9 which are assembled in a whole form a valve cover assembly which can move under the driving of the driving mechanism 5. A seal is provided between the valve cover seat 9 and the valve seat 2 to seal the valve cover 3 and the valve seat 2. Through installing valve gap 3 seal in valve gap seat 9 to realize opening or closing of valve gap 3 through the cooperation of valve gap seat 9 and disk seat 2, rational in infrastructure, processing, assembly are nimble, and sealing performance is good, and can reduce the damage of valve gap 3.

Specifically, as shown in fig. 6 and 7, the outer periphery of the valve cover seat 9 extends downward to form an annular projection 91, and the outer periphery of the valve seat 2 is provided with a support ring 26 and a gland 27 that cooperate with the valve cover seat 9 to fix the valve cover seat 9 and the valve cover 3 when they are capped on the valve seat 2.

The sealing member includes annular first sealing member 101 and annular second sealing member 102, and the periphery of valve seat 2 is all located to first sealing member 101 and second sealing member 102 cover, and second sealing member 102 is located the outside of first sealing member 101 to set up at certain distance apart, first sealing member 101 is the metal seal, and second sealing member 102 is nonmetal sealing member.

The valve seat 2 is provided with a valve seat sealing surface 28 matched with the first sealing element 101, the valve seat sealing surface 28 is a spherical surface, the valve cover seat 9 is provided with a valve cover sealing surface 92 matched with the first sealing element 101, the valve cover sealing surface 92 is a conical surface, and the valve seat sealing surface 28 and the valve cover sealing surface 92 are in sealing connection with the first sealing element 101 from two opposite sides to realize the inner side sealing of the valve cover seat 9 and the valve seat 2. First sealing member 101 is the metal seal spare, through inboard metal hard seal, can reduce the high temperature medium when diffusing and to the washing away of sealing member, guarantee sealed reliability, prolong the life of valve of diffusing.

The sealing pair formed by the matching of the valve seat sealing surface 28 and the valve cover sealing surface 92 also has certain hardness to ensure the service life of the sealing pair, so the valve cover seat 9 and the valve seat 2 adopt the surfacing hard alloy to improve the surface hardness of the sealing pair.

Since the bonnet 3 is mounted in the mounting cavity of the bonnet seat 9 and moves together with the bonnet seat 9, the bonnet sealing surface 92 of the bonnet seat 9 can be regarded as a sealing surface of the bonnet 3.

In addition, the valve cover 3 is connected with the cross beam 44 through the cross hinge shaft 46, the valve cover 3 can swing freely, the sealing surface of the valve cover 3 and the valve seat 2 can be centered automatically, the sealing surface is ensured to be closely matched, and the sealing performance of the bleeding valve is ensured.

Preferably, the installation height of the first seal 101 is higher than that of the second seal 102. The installation height refers to the height of the sealing member 91 relative to the valve seat 2 when the valve cover seat 9 is sealingly connected to the valve seat 2.

The second sealing member 102 may be a sealing member made of rubber, such as a rubber sealing ring. As shown in fig. 7, the second sealing member 102 is mounted in the annular space formed by the support ring 26 and the gland 27, the second sealing member 102 is limited from the radial direction, and the annular protrusion 91 of the bonnet seat 9 is downward matched with the second sealing member 102 for sealing.

The valve cover 3 and the valve seat 2 adopt a metal and nonmetal combined sealing structure, so that the double sealing performance of the bleeding valve can be realized, the sealing is reliable, and the zero-leakage sealing performance can be achieved; meanwhile, the pressure in the furnace or the pipeline connected with the bleeding valve can be ensured, and energy loss is avoided. The embodiment of the utility model provides an in, the nonmetal is sealed to be in the outside that the metal is sealed, and the sealing height of non-metalwork is less than the sealing height of the hard sealing member of metal, can guarantee that the nonmetal sealed face keeps away from high temperature medium in the pipeline, does not receive high temperature medium to erode, guarantees the life of nonmetal sealing member.

The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the protection scope of the present invention is defined by the claims. Various modifications and equivalents of the invention can be made by those skilled in the art within the spirit and scope of the invention, and such modifications and equivalents should also be considered as falling within the scope of the invention.

Claims (10)

1. A bleed valve, comprising:

the valve body is internally provided with a first valve cavity;

the valve seat is arranged on the valve body and is provided with a second valve cavity communicated with the first valve cavity;

the valve cover is arranged on the top of the valve seat and used for covering the top opening of the second valve cavity;

the transmission mechanism comprises a crank, a rocker and a transmission main shaft, the transmission main shaft is rotatably arranged on the valve body, the bending part of the crank and one end of the rocker are rotatably connected to the transmission main shaft, and the other end of the rocker is hinged to the valve cover;

the driving mechanism is arranged on the valve body and connected with one end of the crank, and can drive the crank to rotate and drive the rocker to rotate through the crank, so that the valve cover is driven to move to open or close the second valve cavity;

the disc spring cylinder is rotatably arranged on the valve body through a connecting rod and is hinged to the other end of the crank, the driving mechanism drives the crank to rotate, the disc spring cylinder can be driven to rotate, and a certain disc spring force can be generated when the disc spring cylinder rotates, so that when the valve cover is covered on the valve seat, the force for sealing the valve cover and the valve seat is applied to the valve cover.

2. The bleed valve of claim 1, wherein the crank comprises a first crank arm and a second crank arm disposed at a predetermined angle, the first crank arm being articulated to the drive mechanism and the second crank arm being articulated to the disc spring barrel.

3. The bleeding valve of claim 1, wherein the transmission mechanism further comprises a beam frame and a connecting plate, the beam frame comprises a beam and connecting arms disposed at two ends of the beam, the beam is mounted above the valve cover and connected with the valve cover through a cross hinge, the connecting arms are hinged to the other end of the rocker, the connecting plate is disposed at one side of the rocker, one end of the connecting plate is hinged to the valve cover, the other end of the connecting plate is hinged to the valve body, and the valve cover, the beam, the connecting plate and the rocker form a four-bar linkage mechanism to drive the valve cover to open or close when the crank drives the rocker to rotate.

4. The bleeding valve of claim 1, wherein one end of the linkage is pivotally connected to the valve body and the other end of the linkage is pivotally connected to the outer wall of the disc spring barrel, and rotation of the crank in a first direction causes rotation of the linkage and the disc spring barrel in a second direction opposite to the first direction, and the rotation of the crank in the first direction causes rotation of the linkage in the first direction via the disc spring barrel.

5. The bleed valve of claim 4, further comprising a limiting mechanism mounted to the valve body to limit rotation of the disc spring barrel.

6. The bleeding valve of claim 1, wherein the disc spring barrel comprises a barrel, a disc spring shaft and a disc spring, the disc spring shaft is inserted into the barrel and has one end extending out of the barrel to connect with the other end of the crank, the disc spring is sleeved on the disc spring shaft located in the barrel, the disc spring shaft is provided with a butting portion that butts against the disc spring, and when the crank rotates to drive the disc spring barrel to rotate, the disc spring shaft can compress or release the disc spring to generate a certain disc spring force to act on the crank.

7. The bleeding valve of claim 1, wherein the wall of the first valve chamber is a hollow double-layer structure, wherein a hollow portion forms a valve body water chamber, and a valve body water inlet and a valve body water outlet which are communicated with the valve body water chamber are arranged on the wall; the cavity wall of the second valve cavity is of a hollow double-layer structure, a hollow part of the cavity forms a valve seat water cavity, and a valve seat water inlet and a valve seat water outlet which are communicated with the valve seat water cavity are formed in the cavity wall of the second valve cavity; the valve cover is of a hollow double-layer structure, a valve cover water cavity is formed in the hollow part of the valve cover, and a valve cover water inlet and a valve cover water outlet which are communicated with the valve cover water cavity are formed in the valve cover.

8. The bleeding valve of claim 7, wherein the wall of the first valve chamber is provided with a temperature resistant and heat insulating material, the wall of the second valve chamber is provided with a temperature resistant and heat insulating material, and the inner layer of the double-layer structure of the valve cover is made of a high temperature resistant and corrosion resistant stainless steel material.

9. The bleed valve as in claim 1, further comprising a valve cover seat mounted to the valve seat with a seal disposed therebetween, wherein the seal comprises a first annular seal and a second annular seal disposed outwardly of and spaced apart from the first annular seal, the first annular seal being a metal seal and the second annular seal being a non-metal seal.

10. The bleed valve of claim 9, wherein the valve seat has a valve seat sealing surface that engages the first seal member, the valve seat sealing surface being spherical, the valve bonnet seat has a bonnet sealing surface that engages the first seal member, the bonnet sealing surface being conical, the valve seat sealing surface and the bonnet sealing surface being sealingly connected to the first seal member from opposite sides; the mounting height of the first seal is higher than the mounting height of the second seal.

Images