Pulverized coal regulating valve

Abstract

The utility model provides a pulverized coal regulating valve which comprises a lower valve body, an upper valve body and a lower valve body, the upper valve body is connected with the lower valve body, a valve cover assembly is arranged on the upper valve body, a mounting cavity capable of communicating with the medium inflow channel and a medium outflow channel communicating with the mounting cavity are formed in the upper valve body, and a guide protection sleeve and a first stop position are arranged in the mounting cavity; the valve seat is arranged at the joint of the upper valve body and the lower valve body, a communicating channel capable of communicating the mounting cavity with the medium inflow channel is arranged in the valve seat, and a second stop position is arranged in the communicating channel; and the valve element assembly sequentially penetrates through the valve deck assembly, the upper valve body and the guide protection sleeve and then is located at a first stop position or a second stop position, when the valve element assembly is located at the first stop position, the medium inflow channel communicates with the medium outflow channel, and when the valve element assembly is located at the second stop position, the medium inflow channel and the medium outflow channel are blocked. According to the scheme, the service life of the pulverized coal regulating valve is effectively prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves, in particular to a coal powder regulating valve. Background Art

[0002] At present, the pulverized coal regulating valve adopts an angled single-seat structure, that is, the pulverized coal regulating valve includes a lower valve body, a valve seat, an upper valve body and a valve cover, etc., which are arranged from bottom to top. The upper valve body is connected to the lower valve body, and the valve seat is arranged in the upper valve body and the lower valve body. A medium channel is opened in the upper valve body, the valve seat and the lower valve body. The medium channel is side-in and bottom-out (that is, the side of the upper valve body is the inlet, the bottom of the lower valve body is the outlet, and the inlet and outlet are arranged vertically). A valve core is arranged through the valve cover and the upper valve body. The valve core moves up and down to block or open the medium channel on the valve seat to realize the opening and closing of the valve. However, since the medium flow direction in the valve is side-in and bottom-out, the upper valve body, valve core and valve seat are severely eroded, and are easily damaged, resulting in medium leakage, etc., which affects the service life of the pulverized coal regulating valve. Utility Model Content

[0003] In view of the above-mentioned shortcomings of the prior art, the purpose of the utility model is to provide a pulverized coal regulating valve to solve the above-mentioned problems.

[0004] In order to achieve the above-mentioned purpose and other related purposes, the utility model provides a pulverized coal regulating valve, comprising:

[0005] A lower valve body, wherein a medium inflow channel is arranged in the lower valve body;

[0006] an upper valve body connected to the lower valve body, the upper valve body being provided with a valve cover assembly, the upper valve body being provided with a mounting cavity capable of communicating with the medium inflow channel and a medium outflow channel communicating with the mounting cavity, the mounting cavity being provided with a guide protective sleeve and a first stop position;

[0007] A valve seat is arranged at the connection between the upper valve body and the lower valve body, wherein a communication channel capable of connecting the installation cavity with the medium inflow channel is arranged in the valve seat, and a second stop position is arranged in the communication channel;

[0008] The valve core assembly is located at the first stop position or the second stop position after passing through the valve cover assembly, the upper valve body and the guide protective sleeve in sequence. When the valve core assembly is located at the first stop position, the medium inflow channel is connected with the medium outflow channel. When the valve core assembly is located at the second stop position, the medium inflow channel and the medium outflow channel are blocked.

[0009] Optionally, the valve cover assembly includes a lower valve cover and an upper valve cover which are sequentially installed in a direction away from the upper valve body, and the valve core assembly sequentially passes through the upper valve cover and the lower valve cover and then passes through the guide protective sleeve.

[0010] Optionally, a mounting channel for the valve core assembly to pass through is provided in the lower valve cover, a flow guide tube is provided in the mounting channel, an elastic sealing assembly is provided on the valve core assembly, and the elastic sealing assembly is provided in the flow guide tube.

[0011] Optionally, a guide inner cavity and a guide outer cavity are concentrically arranged on the lower valve cover around the installation channel, a partition cavity wall is arranged between the guide inner cavity and the guide outer cavity, a connecting hole for connecting the guide inner cavity and the guide outer cavity is opened on the partition cavity wall, the guide inner cavity is connected with the installation channel and the inside of the guide pipe; the guide outer cavity is also connected with an air intake pipe.

[0012] Optionally, the communicating holes are evenly distributed around the circumference of the partition cavity wall.

[0013] Optionally, the flow guide cavity is communicated with an end of the flow guide pipe away from the upper valve cover.

[0014] Optionally, the inner cavity of the upper valve body is provided with a ceramic lining.

[0015] Optionally, the axes of the medium inflow channel and the medium outflow channel intersect at an obtuse angle.

[0016] Optionally, a limiting step is provided in the upper valve body, a step surface for cooperating with the limiting step is provided on the guide protection sleeve, and a seal is provided between the step surface and the limiting step.

[0017] As described above, the pulverized coal regulating valve of the utility model has the following beneficial effects:

[0018] In this solution, a medium inflow channel is set on the lower valve body, and a medium outflow channel is set on the upper valve body, that is, a bottom-in and side-out method is adopted. Compared with the existing side-in and bottom-out method, when the pulverized coal regulating valve is closed, only the end of the valve core assembly is eroded by the medium; when the pulverized coal regulating valve is opened, the passage between the medium inflow channel and the medium outflow channel is shorter, and the impact of the medium on other components is smaller. The setting of the guide protective sleeve facilitates the guidance and protection of the valve core assembly and reduces the possibility of vibration during the up and down movement of the valve core. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the internal structure of the pulverized coal regulating valve in the embodiment of the utility model.

[0020] The figure marks in the drawings of the specification include: lower valve body 1, medium inlet channel 101, upper valve body 2, installation cavity 201, medium outflow channel 202, ceramic lining 203, limit step 204, valve seat 3, guide protection sleeve 4, lower valve cover 5, installation channel 501, guide inner cavity 502, guide outer cavity 503, connecting hole 504, upper valve cover 6, cavity sleeve 7, air inlet pipe 8, elastic sealing assembly 9, guide pipe 10, valve core assembly 11. DETAILED DESCRIPTION

[0021] The following is a description of the implementation of the present invention by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0022] Figure 1 Schematic diagram of the internal structure of the pulverized coal regulating valve in the embodiment of the utility model. Figure 1 The arrow in the middle points to the medium flow direction.

[0023] In an exemplary embodiment of the present application, a pulverized coal regulating valve is provided, comprising:

[0024] A lower valve body 1, wherein a medium inflow channel 101 is provided in the lower valve body 1;

[0025] The upper valve body 2 is connected to the lower valve body 1. The upper valve body 2 is provided with a valve cover assembly. The upper valve body 2 is provided with a mounting cavity 201 that can communicate with the medium inflow channel 101 and a medium outflow channel 202 that communicates with the mounting cavity 201. The mounting cavity 201 is provided with a guide protective sleeve 4 and a first stop position.

[0026] The valve seat 3 is arranged at the connection between the upper valve body 2 and the lower valve body 1. A communication channel that can connect the installation cavity 201 and the medium inflow channel 101 is arranged in the valve seat 3. A second stop position is arranged in the communication channel;

[0027] The valve core assembly 11 passes through the valve cover assembly, the upper valve body 2 and the guide protection sleeve 4 in sequence and is located at the first stop position or the second stop position. When the valve core assembly 11 is located at the first stop position, the medium inflow channel 101 is connected with the medium outflow channel 202. When the valve core assembly 11 is located at the second stop position, the valve core assembly 11 blocks the connecting channel, and the medium inflow channel 101 and the medium outflow channel 202 are blocked.

[0028] In this embodiment, a medium inflow channel 101 is provided on the lower valve body 1, and a medium outflow channel 202 is provided on the upper valve body 2, that is, a bottom-in and side-out method is adopted. Compared with the existing side-in and bottom-out method, when the pulverized coal regulating valve is closed, only the end of the valve core assembly 11 is eroded by the medium; when the pulverized coal regulating valve is opened, the passage between the medium inflow channel 101 and the medium outflow channel 202 is shorter, and the impact of the medium on other components is smaller. The guide protection sleeve 4 is provided to facilitate the guidance and protection of the valve core assembly 11, and reduce the possibility of vibration during the up and down movement of the valve core.

[0029] Exemplarily, the valve core assembly 11 includes a valve stem and a valve core disposed at an end of the valve stem for matching with the communication channel.

[0030] In an exemplary embodiment, the valve cover assembly includes a lower valve cover 5 and an upper valve cover 6 which are sequentially installed in a direction away from the upper valve body 2 , and the valve core assembly 11 sequentially passes through the upper valve cover 6 and the lower valve cover 5 and then passes through the guide protective sleeve 4 .

[0031] In this embodiment, the upper valve cover 6 and the lower valve cover 5 are provided to seal the valve body.

[0032] In an exemplary embodiment, a mounting channel 501 for the valve core assembly 11 to pass through is provided in the lower valve cover 5 , a flow guide tube 10 is provided in the mounting channel 501 , an elastic sealing assembly 9 is provided on the valve core assembly 11 , and the elastic sealing assembly 9 is provided in the flow guide tube 10 .

[0033] It is worth noting that the installation channel 501 is provided to realize the installation of the flow guide tube 10 , and the flow guide tube 10 is provided to realize the installation of the elastic sealing assembly 9 .

[0034] Exemplarily, the elastic sealing component 9 adopts a bellows.

[0035] In an exemplary embodiment, a guide inner cavity 502 and a guide outer cavity 503 are concentrically arranged on the lower valve cover 5 around the installation channel 501, a partition cavity wall is arranged between the guide inner cavity 502 and the guide outer cavity 503, a connecting hole 504 for connecting the guide inner cavity 502 and the guide outer cavity 503 is opened on the partition cavity wall, the guide inner cavity 502 is connected with the installation channel 501 and the inside of the guide pipe 10; the guide outer cavity 503 is connected with the air intake pipe 8.

[0036] In this embodiment, the flow guiding outer cavity 503 is provided so that the gas entering from the air inlet pipe 8 can enter the flow guiding inner cavity 502 evenly from the connecting hole 504, so that the circumferential air intake is uniform. The flow guiding inner cavity 502 is provided to achieve communication with the inside of the flow guiding pipe 10, so as to purge the coal powder in the elastic sealing assembly 9.

[0037] Exemplarily, a plurality of groups of communication holes 504 are distributed along the circumference of the valve core assembly 11 to increase the air intake capacity.

[0038] Exemplarily, the flow guiding inner cavity 502 is arranged in the lower valve cover 5. The outer surface of the lower valve cover 5 is provided with an annular groove, and the outer surface of the annular groove is provided with a cavity sleeve 7, and the cavity sleeve 7 and the annular groove form a flow guiding outer cavity 503.

[0039] In an exemplary embodiment, the communication holes 504 are evenly distributed around the circumference of the partition cavity wall.

[0040] In this embodiment, the communication holes 504 are evenly distributed around the circumference of the partition chamber wall to increase the purge uniformity.

[0041] In an exemplary embodiment, the flow guiding cavity 502 is in communication with an end of the flow guiding tube 10 away from the upper valve cover 6 .

[0042] In this embodiment, high-pressure gas is blown from the upper end of the flow guide tube 10 into the upper valve body 2 to prevent the granular medium from entering and causing the valve core assembly 11 to be blocked.

[0043] In an exemplary embodiment, the inner cavity of the upper valve body 2 is provided with a ceramic lining 203 .

[0044] In this embodiment, the ceramic bushing is provided to increase the anti-scouring capability of the interior of the upper valve body 2 .

[0045] In an exemplary embodiment, the axes of the medium inflow channel 101 and the medium outflow channel 202 intersect at an obtuse angle.

[0046] In this embodiment, the medium outflow channel 202 is inclined from one end close to the lower valve body 1 toward a direction away from the lower valve body 1, so that the axes of the medium inflow channel 101 and the medium outflow channel 202 intersect at an obtuse angle, thereby increasing the smoothness of medium outflow.

[0047] In an exemplary embodiment, a limiting step 204 is provided in the upper valve body 2 , and a step surface for cooperating with the limiting step 204 is provided on the guide protection sleeve 4 , and a seal is provided between the step surface and the limiting step 204 .

[0048] Exemplarily, the guide protection sleeve 4 is in contact with the valve cover assembly and a sealing ring is provided at the contact portion, and a sealing ring is provided between the step surface of the guide protection sleeve 4 and the limiting step 204 to better achieve sealing.

[0049] Exemplarily, the inlet of the communication channel for the valve core assembly 11 to enter is a bell mouth that is continuously reduced toward the lower valve body 1, so as to facilitate the entry and exit of the valve core assembly 11 and the entry and exit of the medium.

[0050] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A pulverized coal regulating valve, characterized in that: include: A lower valve body, wherein a medium inflow channel is arranged in the lower valve body; an upper valve body connected to the lower valve body, the upper valve body being provided with a valve cover assembly, the upper valve body being provided with a mounting cavity capable of communicating with the medium inflow channel and a medium outflow channel communicating with the mounting cavity, the mounting cavity being provided with a guide protective sleeve and a first stop position; A valve seat is arranged at the connection between the upper valve body and the lower valve body, wherein a communication channel capable of connecting the installation cavity with the medium inflow channel is arranged in the valve seat, and a second stop position is arranged in the communication channel; The valve core assembly is located at the first stop position or the second stop position after passing through the valve cover assembly, the upper valve body and the guide protective sleeve in sequence. When the valve core assembly is located at the first stop position, the medium inflow channel is connected with the medium outflow channel. When the valve core assembly is located at the second stop position, the medium inflow channel and the medium outflow channel are blocked.

2. The pulverized coal regulating valve according to claim 1, characterized in that: The valve cover assembly comprises a lower valve cover and an upper valve cover which are sequentially installed in a direction away from the upper valve body, and the valve core assembly sequentially passes through the upper valve cover and the lower valve cover and then passes through the guide protective sleeve.

3. The pulverized coal regulating valve according to claim 2, characterized in that: The lower valve cover is provided with an installation channel for the valve core assembly to pass through, a flow guide tube is provided in the installation channel, an elastic sealing assembly is provided on the valve core assembly, and the elastic sealing assembly is provided in the flow guide tube.

4. The pulverized coal regulating valve according to claim 3, characterized in that: The lower valve cover is concentrically provided with a guide inner cavity and a guide outer cavity around the installation channel, a partition cavity wall is provided between the guide inner cavity and the guide outer cavity, a connecting hole for connecting the guide inner cavity and the guide outer cavity is opened on the partition cavity wall, the guide inner cavity is connected with the installation channel and the inside of the guide pipe; the guide outer cavity is also connected with an air intake pipe.

5. The pulverized coal regulating valve according to claim 4, characterized in that: The communication holes are evenly distributed around the circumference of the partition cavity wall.

6. The pulverized coal regulating valve according to claim 4, characterized in that: The flow guiding inner cavity is communicated with an end of the flow guiding pipe away from the upper valve cover.

7. The pulverized coal regulating valve according to claim 1, characterized in that: The inner cavity of the upper valve body is provided with a ceramic lining.

8. The pulverized coal regulating valve according to claim 1, characterized in that: The axes of the medium inflow channel and the medium outflow channel intersect at an obtuse angle.

9. The pulverized coal regulating valve according to any one of claims 1 to 8, characterized in that: A limiting step is arranged in the upper valve body, a step surface for cooperating with the limiting step is arranged on the guide protection sleeve, and a seal is arranged between the step surface and the limiting step.

Images