CN211145455U - A valve core for the outlet pipeline valve of biomass furnace - Google Patents

Abstract

The utility model discloses a valve core for an outlet pipeline valve of a biomass furnace, which comprises a valve plate, wherein the valve plate is cylindrical; the valve plate is also provided with two communicating holes which are through holes penetrating through the inner side and the outer side of the valve plate; in the axial direction of the valve plate, the two communicating holes are in different positions; the valve plate is characterized by also comprising a turning plate arranged in the valve plate through a second rotating shaft, wherein the turning plate can rotate around the second rotating shaft; the valve plate is characterized by also comprising a return spring arranged between the turning plate and the valve plate, wherein when the return spring is in a free state, the turning plate is in a state of cutting off the flow space in the middle of the valve plate, and in the axis direction of the valve plate, the turning plate is positioned between the two communicating holes; when the turning plate is in a state of cutting off the flow space in the middle of the valve plate, the valve plate is connected with the edge of one communicating hole. The valve core has simple structure and low processing and manufacturing cost; the valve based on the valve core has the advantages of simple structure, easy manufacture, low manufacturing cost and anti-blocking performance.

Description

A valve core for the outlet pipeline valve of biomass furnace

technical field

The utility model relates to the technical field of valves, in particular to a valve core used for a biomass furnace outlet pipeline valve.

Background technique

With the rapid development of my country's social economy, the acceleration of urbanization and the rapid improvement of people's living standards, the waste generated in the process of urban production and living has also increased rapidly. The massive increase in domestic waste makes waste disposal more and more difficult. In addition, a large amount of straw obtained in agricultural production, and a large amount of branches and sawdust obtained in wood production, one of the traditional methods is to use direct incineration to obtain heat for reuse. The resulting environmental pollution and other problems have gradually caused all sectors of society. wide attention.

For example, for garbage disposal, in the traditional garbage disposal process, for garbage that has no reuse value, landfill or incineration is generally selected. Solid waste landfill treatment of domestic waste not only occupies land, but also poses a great threat to groundwater resources; although waste incineration can achieve a certain amount of energy conversion and reduce the space requirements for post-processing, when incinerating waste, it not only has the advantages of A large amount of fly ash and nitrogen oxides are produced, and at the same time, toxic substances such as dioxins that have a huge impact on the environment are produced, which brings a burden to the purification treatment and emission of flue gas.

In view of the above problems, in the prior art, there are biomass treatment equipment such as waste that is different from incineration and uses gasification and pyrolysis as means. The use of these equipment can not only convert the organic components in the waste into combustible gas, tar At the same time, due to the low air coefficient required, the energy utilization rate is high, the emission of harmful gases such as dioxins is low, and the investment in exhaust gas treatment is low.

However, when the above biomass treatment equipment or system based on gasification and pyrolysis is in operation, such as in the initial stage of system startup and in the stage of unstable system operation, the product gas produced may not meet the standard or even be unavailable. There are generally three-way valves on the outlet pipeline of the biomass treatment system (or one valve is installed on different pipelines). Among the above three-way valves, one of the valve ports is used as the air inlet, and the other two valve ports are used as the air outlet. , Through the corresponding valve core, adjust the connection state between the air inlet and the specific air outlet, so as to realize the fluid shunt transportation according to the quality of the product gas and the output form of different valve ports.

In the prior art, a three-way valve, a globe valve, a gate valve, etc. can be used for the corresponding valve to achieve the desired purpose, but these existing valves are usually classified as high-temperature valves, and there is a problem of high purchase cost.

Utility model content

Aiming at the technical problem of high valve purchase cost for the above-mentioned corresponding valve for fluid branch transportation of biomass treatment system, the utility model provides a valve core for a biomass furnace outlet pipeline valve. The valve core not only has simple structure and low processing and manufacturing cost; the valve based on the valve core is simple in structure, easy to manufacture, low in manufacturing cost and has anti-blocking performance.

In view of the above problems, a valve core for a biomass furnace outlet pipeline valve provided by the present invention solves the problem through the following technical points: a valve core for a biomass furnace outlet pipeline valve, comprising a valve plate, the The valve plate is cylindrical;

The valve plate is also provided with two communication holes, and the communication holes are through holes passing through the inner and outer sides of the valve plate;

In the axial direction of the valve plate, the two communication holes are in different positions;

It also includes a turning plate installed in the valve plate through the second rotating shaft, and the turning plate can rotate around the second rotating shaft;

It also includes a return spring arranged between the flap and the valve plate. When the return spring is in a free state, the flap is in a state of cutting off the circulation space in the middle of the valve plate, and in the axial direction of the valve plate, the flap is located at the two sides. between the connecting holes;

When the flap is in the state of blocking the flow space in the middle of the valve plate, the valve plate is in contact with the edge of one of the communication holes.

When the valve core is used in practice, a pipeline valve is obtained by cooperating with the corresponding pipeline or valve body. For example, if the pipeline valve is set to include a valve body and a valve plate installed in the valve body, the valve body includes a dead pipe section and two outlet pipes. , the dead pipe section and the outlet pipe can be prepared by using the pipeline on the existing pipeline, or can be prepared by using an independent pipeline to obtain a pipeline valve independent of the pipeline, and the inlet end of the outlet pipe is connected to the side of the dead pipe section. , and the relative positions of the respective inlet ends of each outlet pipe match the relative positions of the two communicating holes on the valve plate;

The valve plate is coaxial with the dead pipe section, and the valve plate is installed in the dead pipe section, and the outer surface of the valve plate is in contact with the inner surface of the dead pipe section;

Also includes a drive mechanism for driving the valve plate to rotate around its own axis, among the two outlet pipes, one of the outlet pipes is pipe A, and the other outlet pipe is pipe B;

When one of the communicating holes is in the state of the conducting pipe A and the dead pipe section, the other communicating hole is staggered from the pipe B, and the pipe B and the dead pipe section are in a cut-off state; in one of the communicating holes, the position between the conducting pipe B and the dead pipe section is In the state, another communication hole is staggered from the position of the pipe A, and the pipe A and the dead pipe section are in a cut-off state.

The above exemplifies a specific application of the above valve core. More specifically, the open end of the dead pipe section is used as the fluid inflow end of the fluid inflow pipeline valve, and the two outlet pipes are used as different fluid outflow pipes for the fluid to flow out of the pipeline valve. The outlet pipe connected to the dead pipe section is controlled by the valve plate: the valve plate is driven to rotate by the driving mechanism, when the communication hole on the valve plate is at the position connecting the dead pipe section and a certain outlet pipe, the corresponding outlet pipe can be output fluid. In this way, with this solution, according to the specific working state of the biomass furnace, the generated gas can be defined to include the product gas that meets the standard and the initial gas that does not meet the standard, and the specific pipeline direction of the generated product gas and the initial gas can be controlled to realize the generated gas. Differential delivery of gases.

In this scheme, when preparing the valve, whether it is the valve body or the valve core, it has the characteristics of easy preparation and low manufacturing cost: for the valve body, it can be easily obtained by using three straight pipe sections: one of the straight pipe sections The end is welded as the bottom plate of the closed end of the dead pipe section. After two pipe holes are opened on the side of the straight pipe section, a straight pipe is welded at each corresponding pipe hole position as the outlet pipe; the three straight pipe sections are also The straight pipe section on the existing fluid pipeline can be used; for the valve plate used as the valve core, the straight pipe section can be used to drill the connecting hole. Therefore, in terms of cost, the solution can achieve the function of fluid shunt transportation by using one valve, and at the same time, the manufacturing cost of the valve body and the valve core is lower than the existing valve manufacturing cost and manufacturing difficulty.

In this scheme, when adjusting the conduction state between the dead pipe section and the specific outlet pipe, the valve plate is matched with a specific position in the dead pipe section, so for the situation that the inner wall of the dead pipe section is enriched with dust, the matching surface of the valve plate and the dead pipe section is rich in dust. In this way, when the valve plate is driven to rotate by the driving mechanism, the influence of dust on the rotation of the valve plate can be effectively reduced, so this scheme also has the characteristics of easy driving of the valve plate to rotate.

In this solution, it is set to include a flap, and at the same time, it is set to include a return spring. During specific use, the communication hole connected to the edge of the valve plate is arranged upstream of the fluid flow path in the valve plate, that is, the communication hole is compared with the other A communicating hole is closer to the open end, which is the inlet end of the dead pipe section, so that it can effectively prevent the sliding plate from being blocked due to the accumulation of dust in the valve plate. , The driving form of the flap can be driven by an auxiliary drive device. In this state, the flap can be regarded as the valve core of the butterfly valve; it can also be driven by the air pressure in the blind pipe section. It can be realized by different air pressures: the second rotating shaft can be eccentrically installed on the flip plate. In this way, when the flap is in a free state, the flap blocks the valve plate, so that dust cannot accumulate on the side of the valve plate close to the closed end of the blind pipe section. When the outlet pipe at the rear end of the flap needs to communicate with the blind pipe section, the drive device Or the air pressure can force the flap to rotate. For the return spring, the second rotating shaft can be rotatably connected to the flap, and the second rotating shaft is fixedly connected to the valve plate. At this time, the return spring can be a coil spring provided inside the valve plate, and the two ends of the coil spring are respectively It is fixedly connected to the valve plate and the turning plate; it can also be set as a fixed connection between the second shaft and the turning plate, such as the interference fit between the second shaft and the turning plate, the connection between the second turning shaft and the turning plate key, and the rotatable between the second turning shaft and the valve plate At this time, in order to facilitate installation, the return spring can be a torsion spring arranged on the outside of the valve plate, and both ends of the torque spring are fixedly connected to the second shaft and the valve plate. A stepped hole with an outer diameter larger than an inner diameter is provided, the inner hole section of the stepped hole is used for clearance fit with the second rotating shaft, and the outer hole section of the stepped hole is used for accommodating the torsion spring.

Further technical solutions are:

In order to make the directions of the outlet pipes as the same as possible, and to facilitate the arrangement of the outlet pipelines, it is arranged that the two communication holes are at different positions in the circumferential direction of the valve plate.

In order to facilitate the switching of the communication state between the dead pipe section and the specific outlet pipe, it is set as follows: the vertical line passing through the midpoint of one of the communicating holes and perpendicular to the axis of the valve plate is the vertical line A, passing through the midpoint of the other communicating hole, And the vertical line perpendicular to the axis of the valve plate is the vertical line B, and the included angle between the vertical line A and the vertical line B is 90° or 180°. With this solution, for example, the drive mechanism is set to include a first rotating shaft and a hand wheel; the valve plate is set in a blind tube shape, and the sealing end of the valve plate is in contact with the sealing end of the blind tube section; the middle of the sealing end of the blind tube section is also provided with a It is the installation hole of the through hole, the axis of the first rotating shaft is collinear with the axis of the dead pipe section, and the first rotating shaft can be rotatably installed in the installation hole; one end of the first rotating shaft is fixedly connected with the sealing end of the dead pipe section, and the hand When the wheel is fixedly connected with the other end of the first rotating shaft, the above switching can be realized by judging the rotation angle of the hand wheel. Further, according to the driving solution, in order to realize the sealing of the sealing end of the dead pipe section, it is arranged that a sealing device for sealing the matching position of the dead pipe section and the first rotating shaft is further included.

As an implementation solution of a sealing device with simple structure, low manufacturing cost and easy maintenance, the sealing device is a packing sealing mechanism including a pressing plate and a sealing packing.

In order to prevent the valve plate from sliding along the axis of the dead pipe section, it is arranged that: the first rotating shaft is further provided with a limiting device for limiting the position of the dead pipe section on the axis of the first rotating shaft. As a person skilled in the art, the limiting device can be realized by using a limiting boss installed on the first rotating shaft, a spring retaining ring for the shaft, etc., or a rolling bearing that can withstand axial force: for example, a deep groove ball bearing is used. , The inner and outer sides of the deep groove ball bearing are respectively matched with the first rotating shaft and the closed end of the blind pipe section.

Since the outlet end of the outlet pipe generally needs to be set with a pipeline, the specific conduction state between the outlet pipe and the dead pipe section is not intuitive at the position of the shunt valve. A locking device for locking the first rotating shaft with respect to the dead pipe section is further arranged between the first rotating shaft and the dead pipe section. The locking device may adopt a fastener disposed between the first rotating shaft and the dead pipe section, such as a hoop, a bolt, a locking nut, and the like.

In order to facilitate the matching accuracy between the valve plate and the blind pipe section, it is set as follows: the valve plate is in the shape of a blind pipe, the communication holes are respectively hole A and hole B, and when the flap is in the state of blocking the flow space in the middle of the valve plate, hole A and hole A The flaps are connected, and in both the hole A and the hole B, the hole A is a communication hole close to the open end of the valve plate. In the specific application of this solution, the sealing end of the above valve plate is attached to the sealing end of the dead pipe section, and the purpose is to achieve the purpose of facilitating the matching accuracy through the interaction of the two sealing ends. After the installation is completed, on the flow path of the fluid in the valve plate, the hole A serving as the communication hole is the communication hole close to the inlet end of the valve plate.

In order to avoid the accumulation of dust in the blind pipe section at the inlet end of the valve plate as much as possible, it is set as follows: the valve plate is in the shape of a blind pipe, and the open end of the valve plate is a tip with a slope, and the slope makes the opening of the valve plate The wall of the end hole is conical, and on the conical section, the position of the largest diameter is located at the end of the open end of the valve plate. In this solution, the slope is the introduction surface for introducing dust into the valve plate for convenient discharge.

In order to realize the automatic adjustment state of the flap to control the on-off of the corresponding position of the valve plate under the air pressure, it is set that the second rotating shaft is eccentrically matched with the flap relative to the center of the flap.

As a specific implementation manner of the return spring, the return spring is a coil spring arranged in the valve plate, and the two ends are respectively fixedly connected to the valve plate and the flap.

As a specific implementation of the return spring, the return spring is a torsion spring that is arranged outside the valve plate and has two ends respectively fixedly connected to the valve plate and the second rotating shaft, the second rotating shaft is fixedly connected to the flap, and the first The two rotating shafts are rotatably connected to the valve plate.

In order to prevent the return spring from increasing the design difficulty or structural complexity of the dead pipe section, it is set as follows: the hole on the valve plate for installing the second rotating shaft includes a stepped hole penetrating the side wall of the valve plate, and the diameter of the outer side of the stepped hole includes a stepped hole. The return spring is installed in the hole section outside the stepped hole, which is larger than the inner hole diameter.

The utility model has the following beneficial effects:

In this scheme, when preparing the valve, whether it is the valve body or the valve core, it has the characteristics of easy preparation and low manufacturing cost: for the valve body, it can be easily obtained by using three straight pipe sections: one of the straight pipe sections The end is welded as the bottom plate of the closed end of the dead pipe section. After two pipe holes are opened on the side of the straight pipe section, a straight pipe is welded at each corresponding pipe hole position as the outlet pipe; the three straight pipe sections are also The straight pipe section on the existing fluid pipeline can be used; for the valve plate used as the valve core, the straight pipe section can be used to drill the connecting hole. Therefore, in terms of cost, the solution can achieve the function of fluid shunt transportation by using one valve, and at the same time, the manufacturing cost of the valve body and the valve core is lower than the existing valve manufacturing cost and manufacturing difficulty.

In this scheme, when adjusting the conduction state between the dead pipe section and the specific outlet pipe, the valve plate is matched with a specific position in the dead pipe section, so for the situation that the inner wall of the dead pipe section is enriched with dust, the matching surface of the valve plate and the dead pipe section is rich in dust. In this way, when the valve plate is driven to rotate by the driving mechanism, the influence of dust on the rotation of the valve plate can be effectively reduced, so this scheme also has the characteristics of easy driving of the valve plate to rotate.

In this solution, it is set to include a flap, and at the same time, it is set to include a return spring. During specific use, the communication hole connected to the edge of the valve plate is arranged upstream of the fluid flow path in the valve plate, that is, the communication hole is compared with the other A communicating hole is closer to the open end, which is the inlet end of the dead pipe section, so that it can effectively prevent the sliding plate from being blocked due to the accumulation of dust in the valve plate. , The driving form of the flap can be driven by an auxiliary drive device. In this state, the flap can be regarded as the valve core of the butterfly valve; it can also be driven by the air pressure in the blind pipe section. It can be realized by different air pressures: the second rotating shaft can be eccentrically installed on the flip plate. In this way, when the flap is in a free state, the flap blocks the valve plate, so that dust cannot accumulate on the side of the valve plate close to the closed end of the blind pipe section. When the outlet pipe at the rear end of the flap needs to communicate with the blind pipe section, the drive device Or the air pressure forces the flap to rotate, and the conduction between the other outlet pipe and the inlet of the dead pipe section can be realized.

Description of drawings

1 is a schematic structural diagram of a specific application embodiment of a valve core for a biomass furnace outlet pipeline valve according to the present utility model, and the schematic diagram is a cross-sectional view of a valve including the valve core;

2 is a schematic partial structure diagram of a specific embodiment of a valve core for a biomass furnace outlet pipeline valve according to the present utility model, the schematic diagram is a partial schematic diagram of a valve plate, and is used to reflect the first position when the return spring is a torsion spring. The matching method of the second shaft and the valve plate;

3 is a schematic structural diagram of a specific embodiment of a valve core for a biomass furnace outlet pipeline valve according to the present invention, and the schematic diagram shows the external structural features of the valve plate.

The marks in the figure are: 1. Dead pipe section, 2. Connecting hole, 3. Outlet pipe, 4. Valve plate, 5. Flap plate, 6. First shaft, 7. Sealing device, 8. Handwheel, 9. Slope Surface, 10, second shaft, 11, return spring.

Detailed ways

Below in conjunction with embodiment, the utility model is described in further detail, but the utility model is not limited to the following examples:

Example 1:

As shown in Figures 1 to 3, a valve core for a biomass furnace outlet pipeline valve includes a valve plate 4, and the valve plate 4 is cylindrical;

The valve plate 4 is also provided with two communication holes 2, and the communication holes 2 are through holes passing through the inside and outside of the valve plate 4;

In the axial direction of the valve plate 4, the two communication holes 2 are in different positions;

It also includes a flip plate 5 installed in the valve plate 4 through the second rotating shaft 10, and the flip plate 5 can rotate around the second rotating shaft 10;

It also includes a return spring 11 arranged between the flap 5 and the valve plate 4. When the return spring 11 is in a free state, the flap 5 is in a state of cutting off the circulation space in the middle of the valve plate 4, and is in the axis of the valve plate 4. In the direction, the flap 5 is located between the two communication holes 2;

When the flap 5 is in the state of blocking the flow space in the middle of the valve plate 4 , the valve plate 4 is in contact with the edge of one of the communication holes 2 .

When the valve core is used in practice, a pipeline valve is obtained by cooperating with the corresponding pipeline or valve body. For example, if the pipeline valve is set to include a valve body and a valve plate 4 installed in the valve body, the valve body includes a dead pipe section 1 and two The outlet pipe 3, the dead pipe section 1 and the outlet pipe 3 can be prepared by using the pipeline on the existing pipeline, or can also be prepared by using an independent pipeline to obtain a pipeline valve independent of the pipeline, and the inlet ends of the outlet pipe 3 are connected to each other. On the side of the dead pipe section 1, and the relative positions of the respective inlet ends of the outlet pipes 3 match the relative positions of the two communication holes 2 on the valve plate 4;

The valve plate 4 is coaxial with the dead pipe section 1, and the valve plate 4 is installed in the dead pipe section 1, and the outer surface of the valve plate 4 is in contact with the inner surface of the dead pipe section 1;

Also includes a drive mechanism for driving the valve plate 4 to rotate around its own axis, among the two outlet pipes 3, one of the outlet pipes 3 is the pipe A, and the other outlet pipe 3 is the pipe B;

When one of the communicating holes 2 is in the state of the conducting pipe A and the dead pipe section 1, the other communicating hole 2 is staggered from the position of the pipe B, and the pipe B and the dead pipe section 1 are in a cut-off state; one of the communicating holes 2 is in the conducting pipe When B is in the state of the dead pipe section 1, another communication hole 2 is staggered from the position of the pipe A, and the pipe A and the dead pipe section 1 are in a cut-off state.

The above exemplifies a specific application of the above valve core. More specifically, the open end of the dead pipe section 1 is used as the fluid inflow end of the fluid inflow pipeline valve, and the two outlet pipes 3 are used as the fluid outflow pipeline valve. Different fluid outflow pipes, And the outlet pipe 3 that is specifically connected to the dead pipe section 1 is controlled by the valve plate 4: the valve plate 4 is driven to rotate by the driving mechanism, when the communication hole 2 on the valve plate 4 is in the connection between the dead pipe section 1 and a certain outlet. When the position of the pipe 3, the corresponding outlet pipe 3 can output fluid. In this way, with this solution, according to the specific working state of the biomass furnace, the generated gas can be defined to include the product gas that meets the standard and the initial gas that does not meet the standard, and the specific pipeline direction of the generated product gas and the initial gas can be controlled to realize the generated gas. Differential delivery of gases.

In this scheme, when preparing the valve, whether it is the valve body or the valve core, it has the characteristics of easy preparation and low manufacturing cost: for the valve body, it can be easily obtained by using three straight pipe sections: one of the straight pipe sections The end is welded as the bottom plate of the closed end of the blind pipe section 1. After two pipe holes are opened on the side of the straight pipe section, a straight pipe is welded at each corresponding pipe hole position as the outlet pipe 3; The pipe section can also use the straight pipe section on the existing fluid pipeline; for the valve plate 4 as the valve core, the straight pipe section can be used to drill the communication hole 2 to obtain it. Therefore, in terms of cost, the solution can achieve the function of fluid shunt transportation by using one valve, and at the same time, the manufacturing cost of the valve body and the valve core is lower than the existing valve manufacturing cost and manufacturing difficulty.

In this solution, since the valve plate 4 is fitted at a specific position in the blind pipe segment 1 when the conduction state between the blind pipe segment 1 and the specific outlet pipe 3 is adjusted, the valve plate 4 is connected to the blind pipe segment 1 for dust enrichment on the inner wall of the blind pipe segment 1. The mating surface of the pipe section 1 is a dead corner for collecting dust, so that when the valve plate 4 is driven to rotate by the driving mechanism, the influence of dust on the rotation of the valve plate 4 can be effectively reduced.

In this solution, it is set to include the flap 5, and at the same time, it is set to include the return spring 11. In specific use, the communication hole 2 connected to the edge of the valve plate 4 is arranged upstream of the fluid flow path in the valve plate 4, that is, the communication hole 2 The hole 2 is closer to the open end serving as the inlet end of the dead pipe section 1 than the other communicating hole 2, so that the sliding plate is blocked due to the accumulation of dust in the valve plate 4 can be effectively avoided: in this solution, the return spring 11 is used to realize The flap 5 is automatically reset in the state of blocking the valve plate 4. The driving form of the flap 5 can be driven by an auxiliary drive device. In this state, the flap 5 can be regarded as the valve core of the butterfly valve; it can also be driven by the air pressure in the blind pipe section 1. , when driven by air pressure, it can be realized by using the different air pressures on the surfaces of the flipping plates 5 on both sides of the second rotating shaft 10 : the second rotating shaft 10 can be eccentrically installed on the flipping plate 5 . In this way, when the flap 5 is in a free state, the flap 5 blocks the valve plate 4, so that dust cannot accumulate on the side of the valve plate 4 close to the closed end of the blind pipe section 1. The outlet pipe 3 at the rear end of the flap 5 needs to be connected with the blind pipe section 1. When connected, the turning plate 5 can be forced to rotate by the driving device or the air pressure. For the return spring 11, the second rotating shaft 10 can be rotatably connected to the flap 5, and the second rotating shaft 10 is fixedly connected to the valve plate 4. At this time, the return spring 11 can be a coil spring provided inside the valve plate 4, And the two ends of the coil spring are fixedly connected to the valve plate 4 and the turning plate 5 respectively; it can also be arranged that the second rotating shaft 10 and the turning plate 5 are fixedly connected, for example, the second rotating shaft 10 and the turning plate 5 are in interference fit, and the second rotating shaft 10 It is connected with the turning plate 5 by key, and the second rotating shaft 10 is rotatably connected with the valve plate 4. At this time, for the convenience of installation, the return spring 11 can be a torsion spring arranged on the outside of the valve plate 4, and the two ends of the torsion spring are respectively on the second side. The rotating shaft 10 and the valve plate 4 are fixedly connected. At the same time, in order to facilitate assembly, a stepped hole with an outer diameter larger than an inner diameter is provided on the outer side of the valve plate 4. The inner hole section of the stepped hole is used for clearance fit with the second rotating shaft 10. The outer hole section of the stepped hole is used to accommodate the torsion spring.

Example 2:

This embodiment is further limited on the basis of Embodiment 1. As shown in FIG. 1 to FIG. 3 , in order to make the direction of the outlet pipe 3 as the same as possible, so as to facilitate the setting of the outlet pipe 3 line, the setting is as follows: In the circumferential direction, the two communication holes 2 are at different positions.

In order to facilitate the switching of the communication state between the dead pipe section 1 and the specific outlet pipe 3, it is set to pass through the midpoint of one of the communication holes 2, and the vertical line perpendicular to the axis of the valve plate 4 is the vertical line A, and pass through the other communication hole. 2, and the vertical line perpendicular to the axis of the valve plate 4 is the vertical line B, and the included angle between the vertical line A and the vertical line B is 90° or 180°. With this solution, for example, the driving mechanism is set to include the first rotating shaft 6 and the hand wheel 8; the valve plate 4 is set to be in the shape of a blind pipe, and the sealing end of the valve plate 4 is in contact with the sealing end of the blind pipe section 1; the blind pipe section 1 The middle part of the sealing end is also provided with a mounting hole which is a through hole, the axis of the first rotating shaft 6 is collinear with the axis of the blind pipe section 1, and the first rotating shaft 6 can be rotatably installed in the mounting hole; one end of the first rotating shaft 6 When the handwheel 8 is fixedly connected to the sealing end of the dead pipe section 1 and the handwheel 8 is fixedly connected to the other end of the first rotating shaft 6 , the above switching can be realized by judging the rotation angle of the handwheel 8 . Further, according to this driving scheme, in order to realize the sealing of the sealing end of the dead pipe section 1 , it is set as follows: a sealing device 7 for sealing the matching position of the dead pipe section 1 and the first rotating shaft 6 is further included.

As an implementation solution of the sealing device 7 with simple structure, low manufacturing cost and easy maintenance, the sealing device 7 is a packing sealing mechanism including a pressing plate and a sealing packing.

In order to prevent the valve plate 4 from sliding along the axis of the dead pipe section 1 , it is arranged that: the first rotating shaft 6 is further provided with a limiting device for limiting the position of the dead pipe section 1 on the axis of the first rotating shaft 6 . As a person skilled in the art, the limiting device can be realized by using a limiting boss installed on the first rotating shaft 6, a spring retaining ring for the shaft, etc., or by using a rolling bearing that can withstand axial force: for example, deep groove balls are used. Bearings, the inner and outer sides of the deep groove ball bearings are respectively matched with the first rotating shaft 6 and the closed end of the blind pipe section 1 in a satisfying manner.

Since the outlet end of the outlet pipe 3 generally needs to be provided with a pipeline, the specific conduction state of the outlet pipe 3 and the dead pipe section 1 is not intuitive at the position of the shunt valve. The purpose is that a locking device for locking the first rotating shaft 6 with respect to the blind pipe section 1 is further arranged between the first rotating shaft 6 and the dead pipe section 1 . The locking device may adopt a fastener disposed between the first rotating shaft 6 and the blind pipe section 1, such as a hoop, a bolt, a locking nut, and the like.

In order to facilitate the matching accuracy of the valve plate 4 and the blind pipe section 1, it is set as follows: the valve plate 4 is in the shape of a blind pipe, the communication holes 2 are respectively the hole A and the hole B, and the flap 5 is located in the middle of the valve plate 4. The circulation space is cut off. In the state, the hole A is in contact with the flap 5 , and in both the hole A and the hole B, the hole A is the communication hole 2 close to the open end of the valve plate 4 . In the specific application of this solution, the sealing end of the valve plate 4 and the sealing end of the dead pipe section 1 are in contact with each other, so as to achieve the purpose of facilitating the matching accuracy through the interaction of the two sealing ends. After the installation is completed, on the flow path of the fluid in the valve plate 4 , the hole A serving as the communication hole 2 is the communication hole 2 close to the inlet end of the valve plate 4 .

In order to avoid the accumulation of dust in the blind pipe section 1 at the inlet end of the valve plate 4 as much as possible, it is set as follows: the valve plate 4 is in the shape of a blind pipe, the open end of the valve plate 4 is a tip with a slope 9, and the slope 9. The hole wall of the open end of the valve plate 4 is conical, and on the conical section, the position with the largest diameter is located at the end of the open end of the valve plate 4. In this solution, the slope surface 9 is the introduction surface for introducing the dust into the valve plate 4 so as to facilitate the discharge.

In order to realize the automatic adjustment state of the flap 5 to control the on-off of the corresponding position of the valve plate 4 under the air pressure, the setting is as follows: the second rotating shaft 10 is eccentrically matched with the flap 5 relative to the center of the flap 5 .

As a specific implementation of the return spring 11 , the return spring 11 is a coil spring arranged in the valve plate 4 , and two ends of which are fixedly connected to the valve plate 4 and the flap 5 respectively.

As a specific implementation of the return spring 11, the return spring 11 is a torsion spring arranged outside the valve plate 4, and the two ends are respectively fixedly connected to the valve plate 4 and the second rotating shaft 10, the second rotating shaft 10 and the flap 5. Fixed connection, the second shaft 10 is rotatably connected to the valve plate 4.

In order to prevent the return spring 11 from increasing the design difficulty or structural complexity of the dead pipe section 1, it is set as follows: the hole on the valve plate 4 for installing the second rotating shaft 10 includes a stepped hole penetrating the side wall of the valve plate 4, and the The diameter of the outer side of the stepped hole is larger than that of the inner side, and the return spring 11 is installed in the hole section outside the stepped hole.

The above content is a further detailed description of the present invention in conjunction with the specific preferred embodiments, and it cannot be considered that the specific embodiments of the present invention are limited to these descriptions. For those of ordinary skill in the technical field of the present invention, other embodiments obtained without departing from the technical solutions of the present invention shall be included in the protection scope of the present invention.

Claims (9)

1. A valve core for a biomass furnace outlet pipeline valve, comprising a valve plate (4), wherein the valve plate (4) is cylindrical; The valve plate (4) is further provided with two communication holes (2), and the communication holes (2) are through holes penetrating the inner and outer sides of the valve plate (4); In the axial direction of the valve plate (4), the two communication holes (2) are in different positions; Also included is a flap (5) installed in the valve plate (4) through the second rotation shaft (10), the flap (5) being rotatable around the second rotation shaft (10); Also includes a return spring (11) arranged between the flap (5) and the valve plate (4), when the return spring (11) is in a free state, the flap (5) is in the middle of the cut-off valve plate (4) The state of the circulation space, and in the axial direction of the valve plate (4), the flap (5) is located between the two communication holes (2); When the flap (5) is in the state of blocking the flow space in the middle of the valve plate (4), the valve plate (4) is in contact with the edge of one of the communication holes (2). 2. A valve core for a biomass furnace outlet pipeline valve according to claim 1, characterized in that, in the circumferential direction of the valve plate (4), the two communication holes (2) are at different positions. 3. A valve core for a biomass furnace outlet pipeline valve according to claim 2, characterized in that it passes through the midpoint of one of the communication holes (2), and is perpendicular to the axis of the valve plate (4). The line is the vertical line A, passing through the midpoint of the other communication hole (2), and the vertical line perpendicular to the axis of the valve plate (4) is the vertical line B, and the angle between the vertical line A and the vertical line B is 90° or 180°. 4 . The valve core for a biomass furnace outlet pipeline valve according to claim 2 , wherein the valve plate ( 4 ) is in the shape of a blind tube, and the communication holes ( 2 ) are holes A and 4 . Hole B, when the flap (5) is in the state of blocking the flow space in the middle of the valve plate (4), the hole A is connected to the flap (5), and in both the hole A and the hole B, the hole A is close to the valve The communication hole (2) at the open end of the plate (4). 5. A valve core for a biomass furnace outlet pipeline valve according to claim 4, characterized in that the valve plate (4) is in the shape of a blind tube, and the open end of the valve plate (4) is a tip with a sloped surface (9) that makes the opening end hole wall of the valve plate (4) conical, and on the conical section, the maximum diameter is located at the opening of the valve plate (4) end. 6. A valve core for a biomass furnace outlet pipeline valve according to any one of claims 1 to 5, characterized in that the second rotating shaft (10) is relative to the center of the flap (5) It is eccentrically matched with the flap (5). 7. A valve core for a biomass furnace outlet pipeline valve according to any one of claims 1 to 5, wherein the return spring (11) is arranged in the valve plate (4), And the coil springs are fixedly connected with the valve plate (4) and the turning plate (5) at both ends respectively. 8. A valve core for a biomass furnace outlet pipeline valve according to any one of claims 1 to 5, wherein the return spring (11) is arranged outside the valve plate (4), and a torsion spring whose two ends are respectively fixedly connected with the valve plate (4) and the second rotating shaft (10), the second rotating shaft (10) is fixedly connected with the turning plate (5), and the second rotating shaft (10) is rotatable Connect to valve plate (4). 9. A valve core for a biomass furnace outlet pipeline valve according to claim 8, wherein the hole on the valve plate (4) for installing the second shaft (10) comprises a through valve plate (4) The stepped hole in the side wall, the outer diameter of the stepped hole is larger than the inner diameter, and the return spring (11) is installed in the hole section outside the stepped hole.

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